JP2023164821A - How to join joints and parts - Google Patents

Abstract

An object of the present invention is to provide a means for improving workability, including relative positioning when joining members to be attached, with a simple structure.
[Solution] A connection in which a pair of fitting parts respectively provided on a pair of opposing attachment target members, a pair of engaging parts that can be fitted into the fitting parts, and a bridge part connecting the pair of engaging parts are provided. A joint having a member, wherein the opening edge of the fitted part has an installation part in which a lid member can be installed, and the lid member is installed in the installation part to prevent the fitting from the fitting part. occlude the opening.
[Selection diagram] Figure 1

Description

The present invention relates to a joint etc. for joining a plurality of members.

BACKGROUND ART Conventionally, buildings, structures, furniture, etc. are constructed by joining members together, including structures such as buildings and houses, bridges, segments, precast products, etc. As a method of joining members, for example, a method of joining precast deck slabs of a bridge, a method using loop reinforcing bars (see, for example, Patent Document 1) is known.
In addition, a method of joining the floor slabs by providing a convex part or a concave part on the surface where the floor slabs are joined and disposing the convex part of one floor slab in the concave part of the other floor slab (for example, see Patent Document 2) )It has been known.
Another method for joining other members is to protrude a C-shaped fitting from each side of a pair of members, and insert the fitting portion of the H-shaped fitting into the fitting recess of the C-shaped fitting. A so-called cotter joint (for example, see Patent Document 3) is known.

JP2008-303538A Patent No. 5879452 Patent No. 5787965

However, the method described in Patent Document 1 mentioned above involves bending reinforcing bars on-site, inserting wires into loop reinforcing bars, and then pouring concrete. It took a long time to do the work. In addition, since the inner bending radius of the loop shape of the reinforcing bars is determined to a certain extent, it is not possible to reduce the thickness of the precast slab, making it impossible to apply it to a predetermined planning height, and increasing the weight of the precast slab. There are problems such as an increase in reaction force and stress, which is structurally disadvantageous for the lower structure and the like.

In addition, in the method described in Patent Document 2, the members are attached to each other via a filler, but no steel rods or prestress are introduced that apply stress in the bridge axis direction to the deck slab. There is a problem that gaps may occur between the deck slabs due to expansion and contraction of the deck slabs due to temperature changes, and there is a risk that the deck slabs may shift in the direction perpendicular to the bridge axis, making it impossible to maintain the joined state.

Furthermore, in the method described in Patent Document 3, when the pair of members are arranged at predetermined positions, the fitting portion of the H-shaped joint fitting can be fitted into the fitted recess of each C-shaped fitting fitting. By this, the C-type joint fitting and the H-type joint fitting can be fixed with bolts for the first time. Therefore, if the members are out of their predetermined positions, there is a problem in that the fitting portion of the H-shaped joint fitting cannot be fitted into the fitted recesses of both C-shaped fittings and fixed with bolts. In addition, in the cotter joint described in Patent Document 3, it is not possible to position the members by fitting the H-type joint fitting to the C-type joint fitting, so there is a possibility of error when joining the members. It is necessary to perform positioning work between missing members. If the component is a precast deck used for a bridge, multiple chain blocks are hung on the precast deck to align the bridge in the direction along the bridge axis, in the direction perpendicular to the bridge axis, and in the height direction. However, there is a problem in that posture adjustment work such as correcting the inclination with respect to the bridge surface becomes extremely difficult, the work time becomes long, and the workability becomes very poor.
In addition, if the positioning of the members is performed using the fastening force of the bolts that connect both fitting parts of the H-type fitting and the C-type fitting, in other words, the positions of the members may be slightly shifted. In addition, with the fitting part of the H-shaped fitting fitting halfway inserted into the fitting recess of the C-shaped fitting fitting, forcefully tighten each bolt and insert the H-shaped fitting fitting so that the fitting part fits into the fitting recess. If an attempt is made to align the members together with the C-shaped joint fitting while pushing in with the axial force of the bolt, there is a problem in that the bolt cannot be tightened accurately. That is, it is extremely difficult to tighten each bolt at the same speed (or torque) at the same time, and in reality, each bolt is tightened gradually one side at a time. However, this work is not easy and is greatly influenced by the senses and skills of the worker, and there is a problem that the fixing state changes depending on the worker. Specifically, when the bolts are tightened on one side at a time, the H-shaped joint fitting sinks on the tightened side, and the opposite side becomes relatively raised and tilts. As a result, the H-shaped joint fitting should be fixed in the position and posture that it should be, but it may be fixed in a different position and in an inclined posture. This not only causes an abnormality in the fastening force but also reduces the fatigue strength and may cause unintended problems with joint compression force.As can be seen from this, H-shaped joint fittings are always It is desirable that it be installed and fixed so that its horizontal position does not tilt.

The present invention was achieved through intensive research by the inventor in view of the above problems, and has a simple structure that improves workability including relative positioning when joining target members to each other. The purpose is to provide a means.

The joint of the present invention includes a pair of fitting parts respectively provided on a pair of opposing members to be attached, a pair of engaging parts that can be fitted into the fitting parts, and a bridge part connecting the pair of engaging parts. a connecting member provided, the opening edge of the fitted part has an installation part in which a lid member can be installed, and the lid member is installed in the installation part so that the It is characterized by closing the opening of the inserted part.

Further, in the joint of the present invention, when the lid member is installed in the installation part, the one end part is prevented from coming into contact with or pressing against the engaging part that is fitted into the fitted part. Features.

Further, in the joint of the present invention, the lid installation part has a female thread area that opens wider than the inner circumferential surface and forms a female thread surface, and the lid member has a surface that is screwed into the female thread surface of the female thread area. It is characterized by having a male thread region having a male thread surface formed thereon.

Further, in the joint of the present invention, the fitted portion has an inner circumferential surface that narrows from the opening edge on one end side to the other end side.

Further, in the joint of the present invention, the connecting member has a shaft portion that is inserted into the bridge portion along the fitting direction of the engaging portion, and a contact portion that is disposed at one end of the shaft portion. Features.

Moreover, the joint of the present invention is characterized in that it has a fixing part that fixes the engaging part and the inserted part.

Further, in the joint of the present invention, the fixing part is a male threaded body, the engaging part has a hole through which the male threaded body is inserted, and the fitted part is a female threaded hole that can be screwed into the male threaded body. It is characterized by having the following.

Further, the joint of the present invention is characterized in that the shaft portion is configured to break when a torque and/or axial force exceeding a predetermined value is applied.

Further, the method for joining members of the present invention is characterized in that members to be attached are joined together using the joint of the present invention.

Further, the method for joining members of the present invention includes a pair of fitting portions provided on a pair of opposing members to be attached, a pair of engaging portions that can be fitted into the fitting portions, and a gap between the pair of fitting portions. a connecting member provided with a bridging portion that connects the connecting member, the connecting member having a shaft portion that can slide in a direction in which the engaging portion is inserted, and an abutment body that can be fixed to the shaft portion, When disposing the connecting member between the fitting parts, each of the engaging parts is fitted into each of the fitting parts, and the shaft part slides with respect to the bridge part, so that the abutting body is connected to the fitting part. Any of a plurality of types of connecting members that are displaced to a point where they come into contact with the inserted part, are fixed by sandwiching the inserted part between the engaging part and the abutting body, and have bridge parts having mutually different lengths. A joint that can be reassembled is provided, and after attaching a connecting member for temporary assembly among the plurality of types of connecting members, the connecting member for temporary assembly is removed and a connecting member for main assembly is attached. do.

Further, the method for joining members according to the present invention is characterized in that the connecting member for temporary assembly has a short bridge portion, and the connecting member for main assembly has a long bridge portion.

Further, the method for joining members of the present invention is characterized in that the connecting member for temporary assembly has a long bridge portion, and the connecting member for main assembly has a short bridge portion.

Further, the method for joining members of the present invention includes distributing a curable fluid between the members to be attached while the members to be attached are connected to each other by the joint to which the connecting member for temporary assembly is attached, When the curable fluid has a hardness above a certain level, the connecting member for temporary assembly in the joint is replaced with the connecting member for main assembly.

Further, in the member joining method of the present invention, the members to be attached are connected by a plurality of the joints, and among the plurality of joints, the joint to which the connection member for temporary assembly is attached and the joint for the main assembly. By disposing the joint with the member attached, the connecting member for the main assembly is stretched in an elastic deformation region, a curable fluid is disposed between the members to be attached, and the curable fluid has a hardness of a certain level or higher. At this time, the connecting member for temporary assembly is replaced with the connecting member for main assembly, and a prestress is applied to the curable fluid.

According to the present invention, with a simple structure, workability including relative positioning when joining members to be attached can be improved.

FIG. 2 is a plan view showing a precast floor slab to which the joint according to the first embodiment is applied. FIG. 2 is a sectional view of a precast floor slab to which the joint according to the first embodiment is applied. The receiving member of the joint according to the first embodiment is shown, in which (a) is a perspective view, (b) is a sectional view seen from the left side, and (c) is a sectional view seen from the front side. It is a perspective view showing a connection member of a joint concerning a first embodiment. It is a figure which shows the procedure of connecting receiving members with a connecting member. It is a figure which shows the positioning process of the precast floor slab to which the joint based on 1st embodiment is applied. It is a figure which shows the positioning performed by making precast floor slabs spaced apart. It is a figure which shows positioning when a precast floor slab shifts in the Y direction. FIG. 7 is a cross-sectional view showing a state in which the engaging portion is in contact with one inner circumferential surface in the Y direction. It is a figure which shows the example of the rotation prevention mechanism between a shaft part and a bridge part. It is a figure which shows the other shape of the inner peripheral surface of a accommodating part, and the outer peripheral surface of an engaging part. It is a figure which shows the example of inclination of the inner peripheral surface of a accommodating part. A joint according to a second embodiment is shown, with (a) being a perspective view and (b) being a side view. FIG. 7 is a perspective view showing a receiving member of a joint according to a second embodiment. It is a figure which shows the example of a shape of an uneven|corrugated engagement part. FIG. 7 is a cross-sectional view showing the configuration of another connecting member. FIG. 7 is a plan view showing the appearance of another connecting member. FIG. 7 is a plan view showing the appearance of another connecting member. FIG. 7 is a plan view showing the appearance of another connecting member. FIG. 3 is a diagram showing a temporary assembled state and a fully assembled state of the joint. It is a figure which shows the procedure of applying prestress by rearranging a connection member. It is a sectional view showing the composition of another joint. It is a top view which shows another example of arrangement|positioning of precast floor slabs. It is a top view which shows another receiving member. It is a figure which shows the receiving member comprised by several partial bodies. It is a figure which shows the receiving member comprised by several partial bodies. It is a figure which shows the receiving member comprised by several partial bodies. It is a figure which shows the example of the anchor arrangement groove of a receiving member. It is a figure which shows the joint provided with the cover member. It is a figure which shows the example of the fixing method of a lid member. FIG. 7 is a perspective view showing the configuration of another joint. The connecting member is shown, with (a) being a perspective view and (b) being a side view. It is a side view which shows a connection member. FIG. 7 is a diagram showing the orientation of the connecting member when the receiving member is deviated in the Y direction. It is a figure which shows the other structure of a joint. It is a figure which shows the connection of the receiving members which differ in height. It is a figure which shows the other structure of a joint. It is a figure which shows the other structure of a joint. It is a figure which shows the other structure of a joint.

Embodiments of the joint of the present invention will be described below with reference to the drawings. The joint of the present invention can be used to connect various attachment target members or join attachment target members, but here, it is applied to precast deck slabs used for deck slabs such as bridges, roads, and railway track foundations. This will be explained using an example.

FIG. 1 is a plan view showing a precast floor slab 1 to which the joint 10 according to the first embodiment is applied, and FIG. 2 is a plan view of the precast floor slab 1 in FIG. 1 to which the joint 10 according to the first embodiment is applied. -A cross-sectional view. The precast deck slab 1 is spanned and fixed over a plurality of main girders (not shown) arranged in the bridge width direction (Y direction). Further, the precast deck slabs 1 are arranged adjacent to each other along the bridge axis direction (X direction) as the member connection direction, and the opposing precast deck slabs 1, 1 are connected by a joint 10. In addition, between the precast floor slabs 1 and 1 after being connected by the joint 10, a hardening material such as grout, ready-mixed concrete, water glass, thermosetting or thermoplastic synthetic resin in a fluid state is used to close the joints. Fluid may be injected.

The joint 10 includes a connecting member 20 and receiving members 30, 30a, and is configured by connecting the receiving members 30, 30a to each other with the connecting member 20. FIG. 3 is a perspective view showing the connecting member 20 of the joint 10 according to the first embodiment. The connecting member 20 has a substantially H-shaped joint shape in cross section, and includes a pair of engaging portions 22, a bridge portion 24 connecting the pair of engaging portions 22, a shaft portion 26 inserted through the bridge portions 24, and a shaft portion. 26 and a pressing body (abutting body) 28 supported so as to be able to rotate integrally therewith.

The engaging portion 22 is a member extending in a direction perpendicular to the XY plane, and has a tapered outer circumferential surface, and gradually extends from the proximal end (upper end) side fixed to the bridge portion 24 to the distal end (lower end) side. It forms a narrowing approximately quadrangular pyramid shape. That is, among the outer circumferential surfaces of the engaging portion 22, the outer circumferential surfaces facing in the X direction are inclined approximately symmetrically from the upper end to the lower end so as to narrow the interval in the X direction, and the outer peripheral surfaces facing in the Y direction are inclined approximately symmetrically. It is tilted approximately symmetrically so that the interval in the Y direction is narrowed from the upper end to the lower end.

The bridge portion 24 is formed in a narrow shape with a shorter length in the Y direction than the engaging portion 22. Further, the bridge portion 24 has an insertion hole extending in a direction perpendicular to the XY plane at the center of the XY plane, and the shaft portion 26 is inserted into the insertion hole. The shaft portion 26 includes a male threaded portion 26a having a right-handed male threaded helical groove formed at one end thereof. Further, the shaft portion 26 includes a head portion 26b at the other end, which has an outer circumferential shape larger than the insertion hole of the bridge portion 24, and has a hexagonal hole formed on the top surface. The head 26b has a seat surface that can come into contact with the bridge portion 24.

The pressing body 28 has a generally rectangular shape in a plan view having a short side portion 28a and a long side portion 28b, and has a female threaded hole into which the male threaded portion 26a can be screwed.

The short side portion 28a is set to a length that does not interfere with the receiving members 30, 30a when the connecting member 20 is disposed between the receiving members 30, 30a. That is, the short side portion 28a is set to have a length shorter than the distance between the receiving members 30, 30a.

The long side portion 28b is set to a length that interferes with the receiving members 30, 30a when the connecting member 20 is disposed between the receiving members 30, 30a. That is, the long side portion 28b is set to have a length that exceeds the distance between the receiving members 30, 30a.

FIG. 4 shows the receiving members 30, 30a of the joint 10 according to the first embodiment, where (a) is a perspective view and (b) is a left side view when the end surface side of the precast floor slab 1 is the front side. (c) is a cross-sectional view seen from the front side. The receiving members (inserted parts) 30, 30a are C-shaped joint fittings having the same shape, and are respectively disposed at the ends of the pair of opposing precast deck slabs 1, 1. A part of the receiving members 30, 30a is embedded in the end portion of each precast floor slab 1, 1 extending along the Y direction. Therefore, the precast floor slabs 1, 1 are arranged so that the receiving members 30, 30a face each other along the X direction.
Although the receiving members 30 and 30a are each said to be a C-shaped joint fitting here, it is sufficient that the receiving members 30 and 30a have sufficient strength as a joint, and the material thereof is not limited to metal.

The receiving members 30 and 30a include an anchor portion 32 extending in the X direction within the precast floor slab 1, a housing portion 34 having a concave shape into which the engaging portion 22 of the connecting member 20 can be fitted, and a long side portion of the pressing body 28. 28b has a regulating portion 36 that can abut, and a step portion 38 that faces the regulating portion 36 in the Y direction.

The receiving members 30 and 30a are disposed on the precast floor slab 1 with the opening edge of the accommodating portion 34 facing upward and along the XY plane. Note that the opening edge of the accommodating portion 34 is not necessarily limited to being disposed upward, and the direction in which it is disposed may be set as appropriate, such as downward.
Further, the receiving members 30 and 30a may be provided so that the accommodating part 34 protrudes from the end of the precast floor slab 1, or a part of the accommodating part 34 may be embedded in the precast floor slab 1. etc., the arrangement method can be set as appropriate.

The accommodating part 34 has a notch at the end opposite to the anchor part 32 in the X direction into which the bridge part 24 can be fitted, and has a lip part 34a along the edge of the notch. The lip portion 34a engages with the engaging portion 22 in the X direction.

The inner peripheral shape of the accommodating portion 34 substantially corresponds to the outer shape of the engaging portion 22, and has a substantially quadrangular pyramid shape that gradually narrows from the opening edge to the bottom. That is, as shown in FIG. 4(b), among the inner circumferential surfaces of the accommodating portion 34, inner circumferential surfaces 40a and 40b facing each other in the X direction extend from the opening edge toward the center in the X direction along the bottom. Tilted approximately symmetrically. Further, as shown in FIG. 4(c), inner circumferential surfaces 40c and 40d facing each other in the Y direction are inclined symmetrically from the opening edge toward the center in the Y direction along the bottom.

The restricting portion 36 is formed at a position substantially directly below the accommodating portion 34 so as to be able to abut the long side portion 28b of the pressing body 28. That is, when extending in the orthogonal direction from the lower end surface 34b of the accommodating part 34 and making the lip portion 34a side of the accommodating part 34 shown in FIG. It is formed. Note that the space defined by the lower end surface 34b and the regulating portion 36 functions as a space into which the long side portion 28b of the pressing body 28 can enter and come into contact with the regulating portion 36.

Next, a procedure for connecting the receiving members 30, 30a using the connecting member 20 and connecting the precast floor slab 1 will be described. The precast floor slabs 1 are arranged such that the ends on which the receiving members 30 and 30a are provided face each other. Further, the receiving members 30, 30a are arranged at a predetermined interval so that their lip portions 34a face each other.

The connecting member 20 allows each engaging portion 22 to fit into each accommodating portion 34 in a direction perpendicular to the XY plane, that is, in the direction shown by arrow A in FIG. 5(a). As a result, the engaging portion 22 fits into the inner circumferential surface of each accommodating portion 34, and the connecting member 20 is disposed between the receiving members 30 and 30a. Here, it is assumed that the short side portion 28a of the pressing body 28 is oriented parallel to the X direction and located on the tip side of the shaft portion 26 so as not to interfere with the receiving members 30, 30a.

When the engaging portion 22 is fitted into the accommodating portion 34, the pressing body 28 is arranged so as to be able to enter the space defined by the lower end surface 34b of the accommodating portion 34 and the regulating portion 36 between the receiving members 30, 30a. Ru. Therefore, the pressing body 28 is positioned between the receiving members 30 and 30a so that the long side portion 28b can come into contact with the regulating portion 36 when the shaft portion 26 is rotated approximately 90 degrees.

Next, as shown in FIG. 5(b), when a torque in the fastening direction is applied to the hexagonal hole of the head 26b through an instrument such as a wrench, the pressing body 28 screwed onto the shaft 26 26. When the pressing body 28 is rotated by approximately 90° (a predetermined angle) and the long side portion 28b is oriented parallel to the X direction, the long side portion 28b comes into contact with the regulating portion 36 of each receiving member 30, 30a. Therefore, further rotation is restricted. In this way, after the pressing body 28 rotates by a predetermined angle together with the shaft portion 26, it engages with the restriction portion 36 in the circumferential direction, and its rotation is restricted.

Furthermore, when torque is applied in the tightening direction, the shaft portion 26 rotates relative to the pressing body 28. As a result, the pressing body 28 rises (displaces) along the axial direction to a position where it comes into contact with the lower end surface 34b. That is, the pressing body 28 moves toward the receiving members 30, 30a and the bridge portion 24 in the axial direction as the shaft portion 26 rotates while contacting the regulating portion 36, and comes into contact with the lower end surface 34b.

When the pressing body 28 comes into contact with the lower end surface 34b and cannot rise as shown in FIG. 5(c), the rotation of the shaft portion 26 in the fastening direction is restricted and the fastening is completed. Thereby, the receiving members 30, 30a are connected by the connecting member 20, and the precast floor slab 1 is connected.

Next, the positioning function of the precast floor slab 1 based on the shapes of the accommodating part 34 and the engaging part 22 will be explained. The joint 10 has a positioning function of moving the precast floor slab 1 by fitting the engaging part 22 into the housing part 34. Specifically, the engaging part 22 and the accommodating part 34 come into contact with each other on their inclined surfaces, and the outer circumferential surface of the engaging part 22 presses the inner circumferential surface of the accommodating part 34, thereby moving the precast floor slab 1. It is something.

In connecting the precast floor slabs 1, 1, one precast floor slab 1 is fixed at a predetermined position and the other precast floor slab 1 is moved so that their relative positions fall within a predetermined range (predetermined position). Position. Here, the precast floor slab 1 on which the receiving member 30a is disposed is fixed, and the precast floor slab 1 on which the receiving member 30 is disposed is moved.

When the relative positions of the precast floor slabs 1 and 1 are further apart along the X direction than a predetermined distance, when the connecting member 20 is placed between the receiving members 30 and 30a, the engagement occurs as shown in FIG. 6(a). The portion 22 is locked at an intermediate position within the housing portion 34. That is, one inner circumferential surface 40a of the accommodating part 34 and the outer circumferential surface of the engaging part 22 are both inclined, and the distal end of the outer circumferential surface of the engaging part 22 abuts at a midway position of the inner circumferential surface 40a, and the engaging part 22 is accommodated. Fitting of the portion 34 into the bottom side is restricted.

When the head 26b is rotated in the fastening direction, the pressing body 28 gradually moves as described above and is displaced to a position where it comes into contact with the lower end surface 34b. As shown in FIG. 6(b), the receiving member 30 and the connecting member 20 are pressed while being sandwiched between the head 26b and the pressing body 28. Therefore, when the shaft portion 26 is further rotated in the fastening direction, the head 26b presses the connecting member 20 toward the pressing body 28 because the position of the pressing body 28 is restricted by the lower end surface 34b.

Note that since the outer circumferential surface and the inner circumferential surface 40a of the engaging part 22 are in contact with each other on inclined surfaces, the pressing force with which the head 26b presses the connecting member 20 is due to the outer circumferential surface of the engaging part 22. The force is transmitted to the inner circumferential surface 40a through the force and is converted into a force that presses the receiving member 30 in the X direction. Therefore, the receiving member 30 moves along the X direction together with the precast floor slab 1 toward the receiving member 30a, and with this movement, the engaging portion 22 enters the accommodating portion 34.

As described above, the receiving member 30 and the precast floor slab 1 on which the receiving member 30 is arranged gradually move toward the receiving member 30a (the other precast floor slab 1) along the X direction, and the engaging portion 22 When the receiving member 30 is inserted into the innermost part of the housing portion 34, the relative position of the receiving member 30 with respect to the receiving member 30a becomes a predetermined position, thereby positioning the precast floor slabs 1, 1.

In this manner, by rotating the shaft portion 26 in the fastening direction and fitting each engaging portion 22 of the connecting member 20 into each accommodating portion 34 of the receiving members 30 and 30a, the engaging portion 22 is inserted into the inner circumference of the accommodating portion 34. By pressing the surfaces, it is possible to position the precast floor slabs 1, 1 relative to each other in a predetermined position.

In addition, although the case where the precast floor slabs 1, 1 whose relative positions are separated or shifted along the X direction by a predetermined interval are positioned and fixed in a predetermined arrangement has been explained as an example, The movement of the precast floor slab 1 to a predetermined position closer than the predetermined position can also be performed in the same manner. That is, when the tip of the engaging portion 22 contacts the other inner circumferential surface 40b of the accommodating portion 34 at an intermediate position as shown in FIG. 7(a), if the head 26b is rotated in the fastening direction, As shown in FIG. 7(b), the pressing body 28 comes into contact with the lower end surface 34b, and the receiving member 30 and the connecting member 20 are sandwiched between the head 26b and the pressing body 28.

As a result, the receiving member 30 is pressed in the direction away from the other precast floor slab 1 side along the X direction via the inner circumferential surface 40b that is in contact with the outer circumferential surface of the connecting member 20, and the precast floor slab 1 And the receiving member 30 moves in a direction away from the receiving member 30a along the X direction. Further, as the receiving member 30 moves, the engaging portion 22 enters the accommodating portion 34, and when the receiving member 30 moves to a predetermined position with respect to the receiving member 30a, the engaging portion 22 fits into the accommodating portion 34. Then, the relative positions of the precast floor slabs 1, 1 are determined in a predetermined arrangement.

Further, for example, when the precast floor slabs 1 and 1 are at positions shifted from each other in the Y direction as shown in FIG. The tip portion contacts the inner circumferential surface 40c of the housing portion 34 and is locked at an intermediate position. That is, the distal end of the engaging portion 22 abuts on the inner circumferential surface 40c at a midway position, and fitting into the bottom side of the housing portion 34 is restricted.

Here, FIG. 9 is a cross-sectional view in a direction orthogonal to the XY plane showing a state in which the engaging portion 22 is in contact with the inner circumferential surface 40c. When the engaging portion 22 contacts the inner circumferential surface 40c at an intermediate position and the head 26b rotates in the fastening direction, the pressing body 28 moves to the position where it contacts the lower end surface 34b as described above. The receiving member 30 and the connecting member 20 are then pressed while being sandwiched between the head 26b and the pressing body 28.

Note that since the outer circumferential surface and the inner circumferential surface 40c of the engaging portion 22 are inclined to each other, a part of the pressing force applied to the receiving member 30 acts as a force in the Y direction via the inner circumferential surface 40c. Therefore, the receiving member 30 is pressed in the Y direction.

Therefore, each time the shaft portion 26 is rotated in the fastening direction, the precast floor slab 1 and the receiving member 30 gradually move in the Y direction, and as a result, the precast floor slab 1 and the receiving member 30 are at a predetermined position opposite to the receiving member 30a in the X direction. Displaced to.

In this way, even if the precast floor slabs 1 and 1 are shifted in the X direction and/or the Y direction, by connecting the receiving members 30 and 30a with the connecting member 20, the precast floor slab 1 can be and/or the Y direction and can be positioned at a predetermined position. That is, the inner circumferential surface of the accommodating portion 34 of the receiving member 30 is pressed by the engaging portion 22, and the precast floor slab 1 can be moved together with the receiving member 30 toward a predetermined position along the X direction and/or the Y direction. can.

In addition, if the precast floor slabs 1 and 1 are deviated from each other in the height direction perpendicular to the XY direction, the engaging part 22 is fitted into the receiving part 34 of the receiving member 30, 30a, and the shaft part 26 is rotated in the fastening direction. By doing so, the height positions of the precast floor slabs 1 and 1 can be adjusted. That is, the axial force that acts on the shaft portion 26 when the shaft portion 26 is rotated in the fastening direction is transmitted to the connecting member 20 or to the pressing body 28 via the head portion 26b. Then, the connecting member 20 presses the receiving member 30, or the pressing body 28 presses the lower end surface 34b of the receiving member 30, and the precast floor slab 1 moves together with the receiving member 30 toward a predetermined height position. Thereby, the precast floor slabs 1, 1 can be connected by matching the height positions of the receiving member 30 and the receiving member 30a.
Of course, if the relative positions of the precast floor slabs 1, 1 are within a predetermined range, the engaging portion 22 can be accommodated without performing the positioning work by rotating the shaft portion 26 described above. Since it can be inserted almost to the deepest part of the portion 34, positioning work is not necessary.

As explained above, according to the joint 10 of the present embodiment, the relative positions of the precast floor slabs 1, 1 are at an intersection level from a predetermined position in the X direction, the Y direction, and the direction perpendicular to the XY plane (height direction). The connecting member 20 enters between the receiving portions 30 and 30a so that the engaging portion 22 fits into the receiving portion 34 of the receiving portions 30 and 30a even if the deviation greatly exceeds (for example, several tens of mm). By simply applying a pressing force, the precast floor slabs 1, 1 can be positioned so that their relative positions fall within a predetermined range, and work including relative positioning when joining the precast floor slabs 1, 1 together can be done It is easy to perform, reduces work time, and improves work efficiency.
Moreover, by simply fastening the receiving parts 30, 30a and the connecting member 20 between the head 26b and the pressing body 28, the head 26b presses the connecting member 20 (or the pressing body 28 presses the receiving part 30). However, the receiving portion 30 can be pressed in the X direction, the Y direction, and/or the height direction.
That is, by simply rotating the shaft portion 26 in the fastening direction so that the receiving portions 30, 30a and the connecting member 20 are fastened between the head 26b and the pressing body 28, the relative relationship between the precast floor slabs 1, 1 is fixed. In addition to being able to position the precast floor slabs within a predetermined range, the series of operations can ultimately complete the work of connecting precast floor slabs at appropriate positions, further improving work efficiency. I can do it.

Furthermore, the pair of receiving members 30, 30a and the connecting member 20 are fastened together by the single shaft portion 26 inserted into the bridge portion 24 and the pressing body 28 disposed on the distal end side of this shaft portion 26. , the pair of receiving members 30, 30a and the connecting member 20 can be firmly fixed. Furthermore, the connection between the pair of receiving members 30, 30a can be strengthened. Therefore, according to the present invention, workability when connecting the receiving members 30, 30a to each other can be improved.

Further, since the connecting member 20 is configured to tighten and fix the pair of receiving members 30, 30a and the connecting member 20 by simply rotating the single shaft portion 26 inserted through the central portion of the bridge portion in the fastening direction, the connecting member 20 can be fixed. Since the engaging portion 22 enters the housing portion 34 and is fixed while maintaining the horizontal position, the connecting member 20 and the receiving members 30, 30a can be fixed in an extremely stable manner.

In addition, even if the relative positions of the opposing precast deck slabs 1 and 1 are shifted in the bridge axis direction or in the direction perpendicular to the bridge axis, the precast deck slab 1 and the receiving part can be inserted into the engaging part 22 in the housing part 34. Since the member 30 moves to a predetermined position, positioning can be easily performed and work efficiency can be further improved.

Note that in addition to the above-described configuration, a rotation prevention mechanism may be formed in the shaft portion 26 to prevent rotation of the shaft portion 26 in the loosening direction due to vibration or the like after fastening. Specifically, a head-side unevenness 50 is provided on the seat surface of the head 26b as shown in FIG. 10, and a bridge-side unevenness 52 that can engage with the head-side unevenness 50 is provided on the surface of the bridge section 24. Further, both the concavities and convexities are formed into sawtooth shapes so that they can be engaged in the circumferential direction. That is, when the shaft portion 26 attempts to rotate in the fastening direction, the head-side unevenness 50 brings the inclined surfaces 50a and 52a into contact with each other, allowing relative sliding while separating the distance between the two in the axial direction. On the other hand, when the shaft portion 26 attempts to rotate in the loosening direction, the vertical surfaces 50b and 52b (surfaces on the steeper side) abut against each other, thereby preventing the shaft portion 26 from rotating.
Of course, the bridge portion unevenness 52 on the bridge portion 24 side corresponding to the head side unevenness 50 provided on the seat surface of the head portion 26b may be configured as a washer-like member separate from the bridge portion 24.

By forming such a rotation prevention mechanism, it is possible to prevent rotation of the shaft portion 26 in the direction of loosening due to repeated vibrations, and also prevent the pressing body 28 from coming off and falling due to rotation of the shaft portion 26 in the direction of loosening. can be prevented.

Moreover, although the internal space of the accommodating portion 34 and the shape of the engaging portion 22 have been described as having a substantially quadrangular pyramid shape, they are not limited thereto. For example, the approximate shape of the engaging portion 22 may be a substantially polygonal pyramid shape such as a substantially triangular pyramid shape, a substantially pentagonal pyramid shape, a substantially hexagonal pyramid shape, or a substantially conical shape as shown in FIG.
Similarly, the internal space of the accommodating portion 34 may have a substantially polygonal pyramid shape such as a substantially triangular pyramid shape, a substantially pentagonal pyramid shape, a substantially hexagonal pyramid shape, or a substantially conical shape corresponding to the engaging portion 22 as shown in FIG. It may also have a conical shape.

Further, although the inner circumferential surface of the accommodating portion 34 and the outer circumferential surface of the engaging portion 22 are symmetrically inclined with respect to the surfaces facing each other in the X direction or the Y direction, the present invention is of course limited to this. Instead, it may be asymmetrically inclined, or it may be a shape in which one of the opposing surfaces is inclined and the other is not inclined.

For example, among the inner circumferential surfaces 40a and 40b of the accommodating portion 34, one inner circumferential surface 40a may not be inclined, and only the other inner circumferential surface 40b may be inclined, as shown in FIG. 12(a). Further, as shown in FIG. 12(b), only one inner circumferential surface 40a may be inclined, or the inner circumferential surfaces 40a and 40b may be inclined at an inclination angle to each other as shown in FIG. 12(c) or 12(d). They may be tilted in the same direction with different angles. Of course, the slope of the outer circumferential surface of the engaging portion 22 may be set in the same manner as described above.

Further, although the head 26b has a shape having a hexagonal hole on the top surface, the present invention is not limited to this, and may be a cross-shaped hole, a slotted hole, a rectangular hole, a star-shaped hole, or the like. Further, instead of providing a hole in the top surface, the outer shape may be an irregular shape such as a substantially square shape or a substantially hexagonal shape.

Further, the precast floor slabs 1, 1 connected by the joint 10 are not limited to those arranged facing each other at a distance, and the precast floor slabs 1, 1 are arranged so that there are almost no joints between the precast floor slabs 1, 1. 1 and 1 may be placed in contact with each other. In that case, as shown in FIG. 23, the length in the X direction is set so that the receiving member 20 (and/or the receiving member 20a) can come into contact with the opposing receiving member 20a (and/or the receiving member 20). Good too.

Next, a joint according to a second embodiment will be described. FIG. 13 shows a joint 60 according to a second embodiment, in which (a) is a perspective view and (b) is a side view. In the following description, the same reference numerals are used for the same components as those of the joint 10 in the first embodiment, and the description thereof will be omitted. Further, in each figure, the anchor portion 32 is not necessarily necessary and will be omitted here.

The joint 60 is different from the joint 10 of the first embodiment in that it has a concave-convex engaging portion 62 that directly engages the receiving members 30, 30a with each other in the insertion direction. The concave-convex engaging portion 62 projects outward from the lip portion 34a along the X direction, and has a plurality of concavo-convex portions arranged in the vertical direction on its end surface.

The concave-convex engaging portion 62 has concavities and convexities that mesh and engage with each other when the relative positions of the receiving members 30 and 30a reach a predetermined position. That is, as shown in FIG. 14, the uneven engagement portion 62 has an unevenness 62a formed on the lip portion 34a on one side in the Y direction and an unevenness 62b formed on the lip portion 34a on the other side in the Y direction. Each has its own. The projections and recesses 62a and 62b are formed so that the positions of the projections and recesses arranged along the fitting direction are staggered so that the projections fit into the recesses of the other side when they are arranged facing each other. Ru.

The joint 60 is configured by connecting the receiving members 30 and 30a via the connecting member 20, as in the first embodiment described above. That is, as in the first embodiment, the connecting member 20 is first disposed between the receiving members 30 and 30a, and a torque in the fastening direction is applied to the shaft portion 26.

When the pressing body 28 screwed onto the shaft portion 26 rotates together with the shaft portion 26 and the long side portion 28b of the pressing body 28 is oriented parallel to the X direction, it hits the regulating portion 36 of each receiving member 30. Contact rotation is restricted. As the shaft portion 26 rotates in the fastening direction, the pressing body 28 gradually moves toward the head 26b and comes into contact with the lower end surface 34b of the receiving members 30, 30a.

As a result, the receiving members 30, 30a and the connecting member 20 are fastened together. In addition, if the relative positions of the precast floor slabs 1 and 1 are apart from each other than a predetermined position, the engagement portion 22 fits into the housing portion 34 to hold the precast floor slab 1 and the receiving member 30 in the predetermined position. It is possible to move it to a certain position and perform positioning. When the precast floor slab 1 and the receiving member 30 are moved to a predetermined position, the unevenness of the uneven engaging portion 62 engages with each other, and the receiving members 30 and 30a are engaged in the insertion direction.

By forming the uneven engagement portions 62 in this way, the strength of joining the precast slabs 1, 1 against external forces along the insertion direction, that is, the direction orthogonal to the XY plane is improved, and the strength of the joint 60 itself is improved. I can do it.

Note that the uneven shape of the uneven engaging portion 62 is not particularly limited, and may be, for example, approximately triangular as shown in FIG. 15(a), approximately wavy as shown in FIG. 15(b), or as shown in FIG. The meshing side surfaces of the unevenness (contact surfaces between the unevenness) shown in FIG. The uneven shape etc. can be set as appropriate. However, if the positions of the receiving members 30 are not aligned in the vertical direction, the opening of the recess is widened and the tip of the projection is set to a narrow shape in order to make it easier for the projection to enter the recess. is preferable.

Further, in each of the above-described embodiments, the head 26b of the shaft portion 26 is in contact with the bridge portion 24, but the present invention is not limited to this, and the head 26b is in contact with the lower end surface 34b of the accommodating portion 34. The shaft portion 26 may be arranged in such a direction that it can make contact. That is, the shaft portion 26 may be inserted into the bridge portion 24 upside down. In that case, the head 26b is formed into a substantially rectangular shape having a short side portion 28a and a long side portion 28b so as to correspond to the shape of the pressing body 28. In this way, the head 26b comes into contact with the regulating part 36, and the rotation in the fastening direction is restricted, and further, the pressing body 28 is screwed onto the shaft part 26 on the bridging part 24 side, and the pressing body 28 is rotated in the fastening direction. By doing so, the receiving members 30, 30a and the connecting member 20 can be fastened together. In this case, it goes without saying that a female threaded body such as a hexagonal nut may be used instead of the pressing body 28.

Further, when inserting the shaft portion 26 upside down, the head portion 26b does not necessarily have to be shaped to contact the regulating portion 36 as long as it can come into contact with the lower end surface 34b. In that case, for example, a groove or the like is formed at the tip of the shaft portion 26 to be engaged with a tool such as a cross recess or a slit. Then, the female threaded body screwed onto the shaft portion 26 is fixed in contact with the bridge portion 24, and the shaft portion 26 is rotated in the fastening direction using a tool or the like, thereby connecting the receiving members 30, 30a and the connecting member. 20 will be concluded.

Further, although the case where the pressing body 28 is screwed into the male threaded portion 26a of the shaft portion 26 has been described as an example, the present invention is not limited to this, and the shaft portion 26 and the pressing body 28 may be integrated. good. In this case, it is preferable that the pressing body 28 is configured to be rotatable by a predetermined angle together with the shaft portion 26 and to be displaceable in the axial direction.

For example, as shown in FIG. 16(a), the shaft portion 26 is slidably inserted into the insertion hole of the bridge portion 24, and the end surface of the head portion 26b is biased so as to be separated from the bridge portion 24 in the axial direction. A force member 70 is provided. As a result, the pressing body 28 can rotate together with the shaft portion 26 at a position where it does not interfere with the stepped portion 38, and comes into contact with the connecting member 20. That is, while pressing the shaft portion 26 and sliding it in a direction against the biasing member 70, the shaft portion 26 is rotated so that the long side portion 28b is parallel to the X direction. Then, when the pressure on the shaft portion 26 is released and the urging member 70 urges the shaft portion 26, the pressing body 28 comes into contact with the lower end surface 34b as shown in FIG. 16(b).

In addition, the connecting member 20 has been described using as an example a configuration in which one engaging portion 22 is disposed on each side in the X direction, that is, the engaging portions 22 are disposed one-on-one with the bridge portion 24 as a boundary. Of course, the number of engaging portions 22 is not limited, and a plurality of engaging portions 22 may be provided at the boundary of the bridge portions 24. For example, as shown in FIG. 17(a), one engaging portion 22 may be provided at one end in the X direction, and two engaging portions 22 may be provided at the other end. Note that the engaging portions 22 may be formed radially around the shaft portion 26 as shown in FIG. 17(b).

Further, the engaging portions 22 may be arranged in a plurality-to-multiple manner with the bridging portion 24 as a boundary. For example, as shown in FIGS. 18(a) and 18(b), two engaging portions 22 may be provided at one end in the X direction, and two engaging portions 22 may be provided at the other end. As shown in FIG. 18(c), three engaging portions 22 may be provided at one end in the X direction, and two engaging portions 22 may be provided at the other end.

Further, the distance from the shaft portion 26 to the engaging portion 22 may be set equal on both sides in the X direction, but it goes without saying that it may be set to different distances as shown in FIG. 19.

In addition, in the above-described embodiment, the engaging part 22 was described as being in close contact with the inner circumference of the accommodating part 34, but at least if the engaging part 22 can be engaged within the accommodating part 34, The inner peripheral space of the portion 34 may be set to be larger than the engaging portion 22. If this is done, a gap will be created between the inner circumferential surfaces 40a to 40d of the accommodating part 34 and the engaging part 22, so positioning must be performed so that the relative positions of the members to which the receiving members are attached are within a predetermined range. It can be carried out.

In addition, in the process of positioning, the distance between the receiving members 30 and 30a is determined by the position of the engaging part 22 that has entered into the housing part 34. It is possible to apply a pressing force, which can be called post-stress rather than pre-stress, to the curable fluid. Specifically, a state in which the precast floor slabs 1, 1 are spaced apart from each other from a predetermined position and the engaging portion 22 of the connecting member 20 is not inserted into the innermost part of the accommodating portion 34 is defined as a temporarily assembled state. Further, a state in which the engaging portion 22 of the connecting member 20 is inserted to the innermost part is a fully assembled state, and a curable fluid is injected between the precast floor slabs 1 and 1 during the temporary assembled state. After hardening to a certain level of hardness, when the state is moved to the main assembly state, the engaging portion 22 of the connecting member 20 presses the inner peripheral surface 40a as shown in FIG. 20, and the precast floor slab 1, A compression force can be applied to the curable fluid between 1 and 2.
Of course, it goes without saying that the precast floor slabs 1, 1 may be temporarily assembled in a state in which they are brought closer to each other than a predetermined position.

Further, in the present invention, since the distance between the receiving members 30 and 30a is determined according to the length of the bridge portion in the X direction, the connection can be made by replacing a plurality of connecting members having different lengths of the bridge portion. It is possible to apply prestress to the curable fluid injected into the gap (joint allowance) between the precast slabs 1 and 1.

Specifically, a short connecting member (referred to as short connecting member 82) and a long connecting member for main assembly (referred to as long connecting member 82) are used. Here, the long connecting member 82 has a long bridge portion 82a that is longer in the X direction than the short bridge portion 80a of the short connecting member 80. Further, the length of the long bridge portion 82a in the X direction is set such that the length of the long bridge portion 82a is longer than the short bridge portion 80a by the amount of elongation in the X direction that the short bridge portion 80a can stretch in the elastic deformation region.

Precast floor slabs 1, 1 are connected to each other by a plurality of joints 10. Here, FIG. 21 is a diagram showing a procedure for applying prestress by rearranging the connecting members, and the precast floor slabs 1, 1 shown in FIG. 21(a) are connected by three joints 10. That is, each precast floor slab 1 has three receiving members 30 (or receiving members 30a) arranged in parallel at substantially equal intervals along the Y direction. The precast floor slabs 1, 1 are positioned by connecting the receiving members 30, 30a using the short connecting members 82.

Next, the short connecting members 82 are removed from the joints 10 located at both ends in the Y direction among the plurality of joints 10 and replaced with the long connecting members 80. Therefore, the short connecting member 82 of the joint 10 at the intermediate position in the Y direction shown in FIG. 21(b) receives a tensile force in the X direction and is stretched in the elastic deformation region, and this is a temporarily assembled state. .

In this temporarily assembled state, a curable fluid is injected into the gap between the precast slabs 1, 1. Note that in order to prevent the curable fluid from adhering to the elongated connecting member 80, an adhesion prevention member such as a cover or a plate may be placed around the elongated connecting member 80 in advance.

After the curable fluid hardens to a hardness above a certain level and becomes a hardened body, the long connecting members 80 are removed from the joints 10 at both ends as shown in FIG. 21(c) and replaced with short connecting members 82. be assembled. As a result, within the cured body, a force acts on the short connecting members 82 that have been stretched in advance at the time of reassembly to return to their original length, applying compressive force to the cured body and imparting prestress. I can do it. This allows the cured product to be reinforced.

Note that after applying prestress, the short connecting members 82 may be left exposed, but the precast floor slabs 1 are injected with a curable fluid so that they are flush with the precast floor slabs 1, 1. , 1 may be closed. Further, the number of joints 10 for connecting the precast floor slabs 1, 1 is not particularly limited, and they may be connected using two joints 10, or may be connected using four or more joints. . Further, the short connecting member 82 may be used for temporary assembly, and the long connecting member 80 may be used for main assembly.

Further, the precast slabs 1, 1 may be connected by a plurality of joints 10 and cotter joints of other structures. As long as the precast slabs 1, 1 can be positioned with respect to each other at least by the joint 10, the number and arrangement of each of the joints 10 and cotter joints can be set as appropriate. For example, an arrangement in which the joints 10 and cotter joints are arranged alternately, an arrangement in which the joints 10 are located at both ends of the precast floor slab 1 in the Y direction and a cotter joint is arranged between the joints 10, a joint 10 It may be arranged such that the cotter joint is located in the center and cotter joints are arranged on both sides thereof.

Further, in each of the embodiments described above, the connecting member 20 is pressed by the axial force generated by rotating the shaft portion 26 in the fastening direction so that the engaging portion 22 fits into the housing portion 34. The shaft portion 26 may be omitted from the connecting member 20 so that the connecting member 20 can be directly pressed with a tool such as a hammer.

Further, in each of the embodiments described above, the insertion hole formed in the bridge portion 24 is not limited to a through hole as long as it is a hole into which the shaft portion 26 can be inserted. For example, as shown in FIG. 22(a), a non-penetrating insertion hole 86 may be formed in the lower end surface of the bridge portion 24. In that case, a male threaded pin 88 serving as a shaft portion is inserted into the insertion hole 86 from below the bridge portion 24 and fixed. Specifically, a female threaded spiral groove is provided on the inner circumferential surface of the insertion hole 86, and a male threaded portion 88a is provided at the base end of the male threaded portion 88a. A head portion 88b is provided. Then, as shown in FIG. 22(b), the male threaded pin 88 is screwed into the insertion hole 86, the head 88b is brought into contact with the lower end surface 34b, and the connecting member 20 and the receiving members 30, 30a are fastened to complete the joint. Configure.

Further, the shape of the receiving members 30, 30a is not particularly limited. For example, as shown in FIG. 24, the outer shape in plan view may be approximately wedge-shaped. That is, the width a1 at one end in the X direction where the lip portion 34a and the inner circumferential surface 40a are provided is narrower than the width a2 at the other end (inner circumferential surface 40b side) in the X direction. good. If such wedge-shaped receiving members 30, 30a are employed, the tensile resistance against tension in the X direction is improved within the precast deck slab and between the receiving members 30 and 30a in the X direction. Therefore, the receiving members 30, 30a and the precast floor slab are fixed even more firmly.

Moreover, the anchor part 32 provided in the receiving members 30, 30a may be provided integrally with the receiving members 30, 30a, or may be separate. The shape of the separate anchor portion 32 is not particularly limited, and the material and shape may be appropriately set, such as a deformed steel bar, threaded reinforcing bar, round bar, U-shaped reinforcing bar, plate shape, etc.
Of course, even if the anchor part 32 is integrated, its shape is not particularly limited.

When disposing the separate anchor part 32 on the receiving members 30, 30a, it is preferable to provide an anchor arrangement groove in the receiving members 30, 30a, and to fit and fix the anchor part 32 therein. Of course, other fixing means such as welding, welding, adhesion, etc. may be applied between the anchor portion 32 and the receiving members 30, 30a. In addition, by making the insertion end of the anchor part 32 into a male thread shape and making the inner peripheral surface of the anchor arrangement groove of the receiving members 30, 30a into a female thread shape and screwing the anchor part 32 into the receiving members 30, 30a, the anchor part 32 can be screwed into the receiving members 30, 30a. 32 may be fixed.

Further, the receiving members 30, 30a may be configured by a plurality of partial bodies formed separately from each other, and the anchor portion 32 may be clamped and fixed between the partial bodies. For example, as shown in FIG. 25, the receiving member 30 is constituted by two separate parts 100 and 102. Although the receiving member 30 will be explained here, it goes without saying that the receiving member 30a can also be configured in the same way. The receiving member 30 has an anchor arrangement groove 104 in the center of the surface opposite to the lip portion 34a in the X direction.

The partial bodies 100 and 102 each have a bonding surface 106 that is perpendicular to the XY plane and parallel to the X direction, and are bonded to each other using the bonding surface 106 as a mating surface. Further, in the partial bodies 100 and 102, an inner circumferential surface of a recess and/or groove constituting the anchor arrangement groove 104 is formed on each engagement surface 106. Therefore, the anchor installation groove 104 is formed by combining the plurality of partial bodies 100 and 102.

The partial bodies 100 and 102 are connected by bolts. Therefore, by communicating the through holes (not shown) formed in each of the partial bodies 100 and 102 and penetrating in the Y direction, inserting a bolt into the communicating through hole, and fastening a nut to the bolt, the partial body 100 , 102 are combined.

Note that the means for connecting the partial bodies 100 and 102 is not limited to bolt fastening, but may be caulking or rivet fastening. Furthermore, bonding means such as adhesion, welding, welding, fitting, or a combination of these may be used.
Furthermore, the bonding surface 106 is not limited to a substantially planar shape, but may have a substantially uneven surface shape as shown in FIG. It may have any shape, such as a substantially wave-like shape in which the unevenness shown in c) is curved.

When unevenness is formed on the coupling surface 106, the frictional force and/or the fitting force between the coupling surfaces 106 will increase if the unevenness is fitted into each other, so that the partial bodies 100, 102 are moved in a direction perpendicular to the XY plane. It is possible to prevent it from sliding along or shifting. Furthermore, before joining the partial bodies 100 and 102, the unevenness of each joining surface 106 can be fitted to facilitate positioning.

Further, the joining surface 106 may be formed with minute irregularities such as knurling or a rough surface, etc. This also increases the frictional force and/or the fitting force between the joining surfaces 106, so that the The bodies 100 and 102 can be prevented from sliding or shifting along the direction perpendicular to the XY plane.
Further, one or more recesses are provided on the joint surface 106 of the partial body 100, one or more convex portions are provided on the joint surface 106 of the partial body 102, and the convex portion is fitted into the recess to perform alignment. It's okay. Further, the bonding surface 106 may have a surface shape in which a part is planar and the other part is a slightly uneven surface, or an uneven surface as shown in FIGS. 26(a) to 26(c).

Further, the position of the coupling surface 106 in the receiving member 30 is not limited to the approximate center position in the Y direction as shown in FIG. 25, but as shown in FIG. The position may be along one end face of the direction. Furthermore, it goes without saying that the bonding surface 106 may be set to be parallel to the XY plane as shown in FIG. 27(b).

Further, the internal shape of the anchor arrangement groove 104 can be set as appropriate, but it is preferably a shape into which the anchor portion 32 fits. That is, when the anchor part 32 is a so-called deformed steel bar having protrusions such as knots and ribs on the outer circumferential surface, the protrusions of the anchor part 32 are formed on the inner circumferential surface of the anchor groove 104 as shown in FIG. 28(a). A recess is provided to fit and engage the protrusion. Further, when the anchor portion 32 is a reinforcing bar curved in a U-shape, the anchor arrangement groove 104 is formed in a U-shape as shown in FIG. 28(b). Furthermore, when the insertion end of the anchor portion 32 has a widened shape, the opening of the anchor placement groove 104 is formed so as to widen from the opening edge toward the back side in the X direction, as shown in FIG. 28(c). When the receiving member 30 is constituted by the partial bodies 100 and 102 in this manner, the shape of the anchor groove 104 can be set as appropriate.

Further, the number of anchor portions 32 disposed on the receiving member 30 is not limited to one, and may preferably be a plurality of anchor portions. In that case, the anchor placement groove 104 is Form multiple pieces depending on the number of pieces.

Furthermore, although the anchor arrangement groove 104 has been described as being constituted by a plurality of partial bodies 100 and 102, the present invention is not limited to this. For example, the anchor arrangement groove 104 may be provided in one partial body 100. good. Of course, if there are a plurality of anchor parts 32, the anchor arrangement groove 104 may be provided for each partial body 100, 102.
Further, in each of the embodiments described above, the accommodating portion 34 has been described as having a concave shape, but of course the accommodating portion 34 may have a hole shape that penetrates the receiving members 30 and 30a.

Further, although the connecting member 20 and the receiving members 30, 30a are fixed by fastening the shaft portion 26, a separate member is additionally provided to press the engaging portion 22 in the receiving member 30, 30a toward the bottom side of the housing portion 34. It is also possible to firmly fix the connecting member 20 and the receiving members 30, 30a by disposing them. For example, a lid member as a separate member that fits into the opening of the accommodating portion 34 is arranged. As shown in FIG. 29, the lid member 120 has a general shape that fits into the opening edge (installation part) of the accommodating part 34, and is inserted into the accommodating part 34 so that one end in the fitting direction can press the engaging part 22. stand out. By fitting the lid member 120 onto the opening edge of the accommodating portion 34 in this manner, the engaging portion 22 can be pressed while closing the accommodating portion 34 .

In order to more firmly fix the lid member 120 to the housing portion 34, the lid member 120 and the housing portion 34 may be fastened together. That is, even if a male screw region is formed on the outer circumferential surface of the lid member 120 and a female screw region is formed on the inner peripheral surface on the opening edge side of the accommodating portion 34, the lid member 120 is screwed and fixed to the accommodating portion 34. good.

For example, as shown in FIG. 30(a), the accommodating portion 34 has a female thread region 130 formed at the open end (upper end), which has a circular inner periphery and has a female thread spiral thread on the peripheral surface. form. Note that the female thread region 130 has a hole shape that is larger in diameter than the region of the accommodating portion 34 into which the engaging portion 22 is fitted so as not to interfere with the engaging portion 22 that is fitted into the accommodating portion 34 .

On the other hand, the male threaded region of the lid member 120 includes a male threaded region 122 having a cylindrical shape and a protrusion 124 that projects in the axial direction. The male thread region 122 has a male thread helical groove on its outer periphery that engages with the female thread thread of the female thread region 130 . The protrusion 124 is disposed on the distal end side of the male thread region 122 and protrudes in the axial direction.
Therefore, by fastening the male threaded region 122 to the female threaded region 130 as shown in FIG. A downward pressing force can be applied to the joining portion 22. Note that the lengths of the male thread region 122 and the female thread region 130 can be set as appropriate.

Note that the protrusion length of the protrusion 124 is not particularly limited, but it should be set so that the protrusion 124 presses the engagement portion 22 when the lid member 120 is fastened and fixed to the accommodating portion 34. For example, it is possible to control the pressing force applied to the engaging portion 22 by tightening the lid member 120.
Further, in the above description, the lid member 120 and the accommodating portion 34 are fastened and fixed, but other fixing means such as adhesion, welding, and welding may be used.
Further, a sealing member may be provided on the lid member 120 so that the lid member 120 can fit into the housing portion 34 in a water-tight or liquid-tight manner.

FIG. 31 is a perspective view showing the configuration of another joint, in which the joint 200 includes receiving members 210, 210a having a substantially conical accommodating portion 212, and a connecting member having a substantially conical engaging portion 222. Equipped with 220. The receiving members 210, 210a have uneven engaging portions 214, 214a that protrude outward along the X direction, and the uneven engaging portions 214, 214a have unevenness that can be engaged in the Z direction by meshing with each other. . Therefore, when the concave and convex engaging portions 214, 214a of the receiving members 210, 210a are engaged with each other, the relative positions of the receiving members 210, 210a become a predetermined position. The housing portion 212 is open at the top, and a female thread spiral strip for installing the lid member 230 is disposed on the inner circumferential surface near the opening. That is, the shape of the inner circumferential surface of the accommodating portion 212 is set such that the lid member 230 having the male threaded spiral groove on the outer circumferential surface can be screwed and fixed thereto.

In addition, in the receiving members 210 and 210a, the notch 216 into which the bridge portion 220 can be fitted has a shape that expands in a V-shape along the X direction. That is, it is formed so as to gradually expand outward in the X direction from the accommodating portion 212 side.

FIG. 32 shows a connecting member 220, in which (a) is a perspective view and (b) is a side view. Here, the bridge portion 224 has a shape in which a base portion connected to the engaging portion 222 is widened in a V-shape so as to correspond to the shape of the notch 216 . That is, the bridge portion 224 has a shape in which the width along the Y direction gradually increases from the base side (the engaging portion 222 side) toward the center portion.

Furthermore, at least a pair of connecting portion-side locking portions 224a that protrude in the Z direction are formed on the lower end surface of the connecting member 220. The connecting portion side locking portions 224a are disposed at positions facing the shaft portion 26 in the X direction, and here are disposed on both sides of the shaft portion 26 in the X direction. The connecting portion side locking portion 224a functions as a part of a rotation prevention mechanism of the pressing body 226, which will be described later.

A shaft portion 26 is inserted through a central insertion hole in the bridge portion 224, and a pressing body 226 is disposed in a male threaded portion 26a formed in the shaft portion 26. The pressing body 226 includes a main body portion having a substantially rectangular shape in a plan view having a short side portion and a long side portion, and a cylinder having an elliptical or rectangular shape in a plan view disposed on a surface of the main body portion facing the bridge portion 224. It has a pressing body side locking part 226a which is a shaped protrusion. Further, like the pressing body 28 described above, the pressing body 226 is also formed with a female threaded hole into which the male threaded portion 26a is screwed and through which the shaft portion 26 can be inserted. The long side portion of the pressing body side locking portion 226a is set to be parallel to the long side portion of the pressing body 226 in plan view, and longer than the interval between the pair of connecting portion side locking portions 224a, and the short side portion The width is set such that the connecting portion side locking portions 224a can be positioned between the pair of connecting portion side locking portions 224a.
Therefore, by positioning the short side portion of the pressing body side locking portion 226a between the connecting portion side locking portions 224a, a rotation prevention mechanism for the pressing body 226 is configured. That is, when the pressing body 226 rotates from the state where the pressing body side locking part 226a is located between the connecting part side locking parts 224a, the long side part of the pressing body side locking part 226a is located between the connecting part side locking parts 224a. Since it is longer than the interval, the pressing body side locking portion 226a contacts the connecting portion side locking portion 224a and is locked in the circumferential direction. As a result, it functions to prevent the pressing body 226 from rotating.

According to the joint 200 configured as described above, it is possible to prevent the pressing body 226 from rotating from a predetermined state when the connecting member 220 is installed on the receiving members 210, 210a with the head 26b being pinched. Specifically, when the short side of the pressing body 226 shown in FIG. The pressing member-side locking portion 226a is brought into contact with the lower end surface of the bridge portion 224 between the pair of connection-side locking portions 224a. At this time, even if an external force that causes the pressing body 226 to rotate relative to the shaft portion 26 is applied, the pressing body side locking portion 226a abuts the coupling body side locking portion 224a, and rotation is restricted. Therefore, it is possible to prevent the pressing body 226 from coming into contact with the receiving members 210 and 210a while the engaging portion 222 is being inserted into the housing portion 212 while pinching the head portion 26b.
Of course, here, the connection side locking part 224a provided on the side of the connection member 220 is configured to prevent relative rotation with the pressing body 226, but the invention is not limited to this. It is also possible to provide a locking portion that can be locked to the connecting member 220 on the upper surface of the connecting member 220 .

In addition, by using the joint 200, compared to the case where the square pyramid-shaped engaging portion 22 described above is inserted into the housing portion 34, the range of positional deviation between the receiving members along the Y direction that can be aligned is reduced. can be expanded. Specifically, as shown in FIG. 34, even if the connecting member 220 is inclined with respect to the X and Y axes on the XY plane, the engaging portion 222 can be accommodated in the accommodating portion 212. Therefore, it is possible to deal with the magnitude of positional deviation along the Y direction over a wider range.

Further, by making the shape of the notch 216 and the base of the bridge portion 224 into a V-shape, the strength of the engagement between the conical accommodating portion 212 and the engaging portion 222 in the X direction can be improved. .
In addition, since the uneven engaging parts 214 and 214a are located on both sides of the notch 216 in the Y direction, the Y direction between the uneven engaging parts 214 and 214a is caused by the positional deviation in the Y direction between the receiving members 210 and 210a. The gap along which the pressing body 226 passes becomes narrower. Therefore, the installation positions and the widths along the Y direction of the uneven engaging portions 214 and 214a are determined in such a way that at least a gap can be ensured for the pressing body 226 to pass through even if the receiving members 210 and 210a are shifted in the Y direction. is set to

Further, the screwing structure between the lid member and the accommodating portion is not limited to the above, but for example, a male threaded spiral groove may be formed on the accommodating portion side, and a female threaded helical groove may be formed on the lid member side. A structure may be configured. That is, a substantially cylindrical tube part surrounding the opening of the accommodating part is disposed on the upper surface of the engaging part, and a male threaded spiral groove is formed on the outer circumferential surface of the cylinder part, while the lid member has a concave cross section and an inner part. The opening in the upper portion of the storage portion may be closed by the lid member by forming a female thread on the circumferential surface and screwing the female thread on the lid member into the male thread groove of the cylinder.

Moreover, the engagement part 22 and the accommodating part 34 touch each other's inclined surfaces, and the outer circumferential surface of the engaging part 22 presses the inner circumferential surface of the accommodating part 34, thereby moving the precast floor slab 1. However, if at least one of the outer circumferential surface of the engaging portion 22 and the inner circumferential surface of the accommodating portion 34 is an inclined surface, the precast floor slab 1 can be moved. For example, as shown in FIG. 38(a), the outer circumferential surface of the engaging portion 22 has a vertical surface 400 (non-inclined surface) parallel to the insertion direction, and an inclined inner circumferential surface 40a (or inner circumferential surface 40b). ) and the vertical surface 400 contact or press, the precast floor slab 1 may be moved. Further, as shown in FIG. 38(b), the engaging portion 22 has an inclined outer circumferential surface, the accommodating portion 34 has a vertical surface 410 (non-inclined surface) on the inner circumferential surface on the opening side, and the engaging portion The precast floor slab 1 may be moved when the inclined outer circumferential surface of the container 22 contacts or presses the vertical surface 410 of the housing portion 34. In addition, since the vertical surfaces 400 and 410 come into contact with the sloped surface from the corner, they may be chamfered to provide a corner surface or a rounded surface so as not to damage the sloped surface.

Further, the shaft portion 26 may be configured to be broken by application of torque and/or axial force exceeding a predetermined value, and a portion of the shaft portion 26 can be separated and dropped together with the pressing body screwed into the male threaded portion 26a. For example, a fragile portion 310 (see FIG. 35) in which a V groove is carved in the circumferential direction is provided on the circumferential surface of the male threaded portion 26a of the shaft portion 26. If a predetermined torque or more is applied to the shaft portion 26 and the shaft portion 26 breaks at the weakened portion 310, the externally threaded portion 26a extending below the bridge portion 24 can be removed. The engraving for providing the fragile portion 310 is performed by an appropriate method such as cutting or plastic working, and the method is not limited. Further, a hole may be formed or a hanging device may be provided in the male threaded portion 26a that is cut off due to breakage, and a string, chain, wire, etc. may be connected to the hole or the hanging device. By connecting a string, chain, wire, etc. to the male threaded portion 26a in this manner, the male threaded portion 26a that has been cut off and fallen and the pressing body 28 screwed thereto can be easily pulled up and recovered. Further, instead of the male threaded portion 26a, a hole, a hanging device, etc. may be provided on the pressing body 28 side to connect a string, chain, wire, etc., and this also allows the male threaded portion 26a and the pressing body 28 to be pulled up after falling. can be easily recovered.

Further, the connecting member 20 and the receiving members 30, 30a were fixed by fastening the shaft portion 26 and the pressing body 28, but the engaging portion 22 and the receiving member 30 (30a) were further fixed using bolts. You may. For example, a through hole 240 (see FIG. 35) parallel to the axial direction is provided by drilling into the engaging portion 22, and a female screw hole (see FIG. 35) is provided at the bottom of the accommodating portion 34. Then, the engaging part 22 may be fixed to the receiving member 30 (30a) by inserting the bolt 250 (see FIG. 35) into the through hole 240 of the engaging part 22 and screwing it into the female threaded hole 260.

FIG. 35 shows the structure of another joint, in which (a) is a plan view, (b) is a sectional view taken along the line AA, and (c) is a sectional view taken along the line BB. The engaging portion 22 is provided with a through hole 240, and the through hole 240 is formed by drilling a substantially central portion of the engaging portion 22. Furthermore, the through hole 240 is provided along the direction in which the engaging portion 22 is inserted into the housing portion 34 . The receiving members 30, 30a have a female threaded hole 260 at the bottom.
Further, bolts 250 are provided to fix the engaging portion 22 and the receiving members 30, 30a. The bolt 250 can be inserted into the through hole 240 and screwed into the female screw hole 260, and has a shaft portion 252 having a male screw portion 250a formed at one end, and a head portion 254 having a hexagonal outer circumference. has. The head 254 has an outer shape with a longer length (width) in the direction orthogonal to the axis than the shaft 252 .

The bolt 250 is tightened after the engaging portion 22 is fitted into the housing portion 34 . Specifically, first, the engaging portion 22 is fitted into the housing portion 34 . Then, the bolt 250 is inserted into the through hole 240 of the engaging portion 22, and the male threaded portion 250a is screwed into the female threaded hole 260 and tightened.

The inner circumferential surface of the accommodating portion 34 may have a cross-sectional shape such as a substantially conical shape, a substantially conical shape, a substantially truncated conical shape, etc., and include at least a tapered surface that gradually narrows from the opening edge toward the innermost part. If so, a vertical surface 300 extending substantially vertically may be included between the opening edge and the bottom, as shown in FIG. 35(b). That is, the opening edge has an inclination for guiding the engagement part 22 to fit in, and from the inclination there is a vertical plane (first plane) 300 substantially parallel to the direction in which the engagement part 22 is inserted, and from the vertical plane 300 to the bottom part. The inner peripheral surface may have a tapered surface (second surface) 302 that gradually narrows toward the side. In that case, the outer circumferential shape of the engaging portion 22 may be shaped along the inner circumferential shape of the accommodating portion 34 . That is, when the engaging part 22 is housed in the housing part 34, the vertical surface 22a can be in parallel sliding contact with the vertical surface 300, and the engaging part 22 can be in parallel with the inclined surface 302 and in contact with the inclined surface 302. It may have an outer circumferential surface including an inclined surface 22b.

In addition, in the embodiment described above, the height position can be adjusted even if the precast floor slabs 1 and 1 are shifted in the height direction, but the precast floor slabs 1 and 1 are It is also possible to fix the floor slabs to each other using the joint 10 while being shifted by a predetermined amount. In that case, a spacer (intervening part) 270 is interposed at the inner part of the receiving part 34 with a lower set height of the receiving parts 30 and 30a in the depth direction into which the engaging part 22 is inserted. Insert the section 22.

Here, FIG. 36 shows the connection of the receiving members 30, 30a with different heights, (a) is a sectional view showing the receiving members 30, 30a with different height positions, and (b) is a cross-sectional view showing the receiving members 30, 30a with different height positions, and (b) is fixed by a joint. It is a sectional view showing receiving members 30 and 30a. The spacer 270 is a washer-like member having a substantially annular shape, and has a hole in the center through which the bolt 250 can be inserted. Further, the spacer 270 restricts the depth at which the engaging portion 22 can be inserted, and positions the engaging portion 22 within the housing portion 34 at a shallow position by depth h from the innermost portion. That is, the spacer 270 contacts the engaging portion 22 within the housing portion 34 and restricts the movement of the engaging portion 22 in the insertion direction.

Specifically, the height positions of the opposing precast floor slabs (not shown) are made different, so that the receiving member 30 is at a higher position than the receiving member 30a by the length h shown in FIG. 36(a). In this case, before installing the connecting member 20, a spacer 270 having a thickness that matches the height difference (length h) between the receiving members 30, 30a is placed, and then the connecting member 20 is placed. When disposing the connecting member 20, a torque in the fastening direction is applied to the shaft portion 26 inserted through the bridge portion 24. As a result, as shown in FIG. 36(b), the pressing body 28 comes into contact with the lower end surface of the receiving member 30a, and the shaft portion 26 becomes unable to rotate in the fastening direction. Then, as shown in FIG. 36(c), the bolt 250 is inserted into the through hole 240 of the engaging portion 22, the male threaded portion 250a is screwed into the female threaded hole 260, and the bolt 250 is rotated in the fastening direction.
In this state, by further applying torque in the fastening direction to the shaft portion 26 and inputting an overload to the fragile portion 310, the shaft portion 26 is broken at the fragile portion 310, as shown in FIG. 36(d). , the male threaded portion 26a is cut off and dropped together with the pressing body 28. Of course, it is desirable to pick up and remove any fallen parts. Further, a portion of the shaft portion 26 remaining after the breakage may be removed by pulling it out from the bridge portion 24.

In this manner, by arranging the spacer 270, the position of the engaging portion 22 fitted into the receiving member 30a is shallower than the innermost part by the length h, and the receiving members 30, 30a are kept at a predetermined height difference. While setting, the connecting member 20 can be arranged so that the bridge portion 24 is held in a substantially horizontal position between the receiving members 30 and 30a, and both engaging portions 22 are held substantially horizontally.

Further, the depth into which the engaging portion 22 can be fitted may be restricted by a method other than arranging the spacer 270. For example, the depth into which the engaging portion 22 can be fitted may be restricted by providing an intervening member 280 that can be displaced in the depth direction, as shown in FIG. 37(a). The intervening member 280 is a substantially cylindrical member interposed between the female threaded hole 260 and the bolt 250. Further, the intervening member 280 has an outer circumferential male threaded portion 280a formed on its outer circumferential surface that can be screwed into the female threaded hole 260, and an inner circumferential female threaded portion 280b that can be screwed into the male threaded portion 250a on its inner circumferential surface.

The intervening member 280 can protrude into the accommodating portion 34 by rotating relative to the receiving member 30a. That is, the outer peripheral male threaded portion 280a of the intervening member 280 can be threaded into the female threaded hole 260, so that the intervening member 280 can enter into the housing portion 34 along the axial direction. Therefore, by positioning the intervening member 280 so that the distal end of the intervening member 280 along the traveling direction is within the accommodating portion 34, the depth into which the engaging portion 22 can be fitted can be regulated. For example, as shown in FIG. 37(b), the height positions of opposing precast floor slabs (not shown) are different, and the receiving member 30a is longer than the receiving member 30 by a length h'. If the intervening member 280 is located at a high position, before installing the connecting member 20, position the intervening member 280 so that it protrudes into the accommodation portion 34 with a length that matches the height difference (length h') between the receiving members 30, 30a. conduct. Then, the connecting member 20 is arranged.

Therefore, by abutting the intervening member 280, the depth into which the engaging portion 22 can be fitted is restricted. Therefore, as in the case of arranging the spacer 270, a desired height difference is set between the receiving members 30 and 30a, and the bridging portion 24 is held in a substantially horizontal position between the receiving members 30 and 30a, and both engaging portions 22 The connecting member 20 can be arranged so that the connecting member 20 is arranged substantially horizontally.
Moreover, since the intervening member 280 can change the protrusion length into the housing part 34 by screwing into the female screw hole 260, it is possible to change the protrusion length into the receiving member 30, rather than arranging the spacer 270. It becomes possible to flexibly respond to height differences between the 30a. That is, in the case of the spacer 270, it is necessary to prepare a plurality of spacers with various thicknesses in order to be able to deal with various height differences, whereas in the case of the intervening member 280, only the rotation speed is controlled. , it becomes easier to deal with differences in height compared to the case of spacers. Of course, when using the spacer 270, by setting a unit thickness, it is possible to easily accommodate the height difference in stages by changing the number of stacked sheets.

Further, in each of the embodiments described above, the shaft portion 26 has been described as having the head portion 26b, but the shaft portion 26 may have a substantially rod shape without the head portion 26b. However, the outer circumferential shape is set so that it can engage with the bridge portion 24 in the axial direction. Specifically, as shown in FIG. 39(a), the shaft portion 430 has a male threaded portion 432 at one end, and the bridge portion 24 has a female threaded hole 440 in the center that is screwed into the male threaded portion 432. It may be configured as follows.

Further, the shaft portion 430 has a male threaded portion 434 at the other end, a separate female threaded member 450 can be screwed into the male threaded portion 434, and when the pressing body 28 is supported by the female threaded member 450, the shaft It is disposed so as to be loosely fitted to the portion 430. The female thread member 450 is a substantially disk-shaped member with an open center, and a female thread portion that is screwed into the male thread portion 434 is formed on the open inner peripheral surface. Therefore, it is also possible to attach the pressing body 28 to the shaft portion 430 by loosely fitting the pressing body 28 into the shaft portion 430 and screwing the female threaded member 450 into the male threaded portion 434.

Further, the male threaded portion 432 and the male threaded portion 434 may have thread directions opposite to each other. For example, if the male threaded portion 432 and female threaded hole 440 are right-handed threaded, and the male threaded portion 434 and female threaded member 450 are left-handed threaded, by rotating the shaft portion 430 counterclockwise, the female threaded member 450 (and pressing body 28) can be bridged. The portion 24 can be moved in a direction in which the portion 24 is relatively close to each other.
That is, when the shaft portion 430 rotates to the left, the female screw member 450 advances in the tightening direction (towards one end where the bridge portion 24 etc. shown in FIG. 39(b) exists) relative to the shaft portion 430, and is pressed. The body 28 is pushed by the female threaded member 450 and moves in the axial direction. On the other hand, the bridging portion 24 advances in a loosening direction relative to the shaft portion 430 (towards the other end where the female threaded portion 450 and the like shown in FIG. 39(b) are present). Therefore, the pressing body 28 and the bridging portion 24 move to a position where they press against each other, and it is possible to position the precast floor slabs 1, 1 similarly to the first embodiment.

Note that when arranging the shaft portion 430 as described above, a separate female threaded member 460 is provided instead of providing the female threaded hole 440, and the female threaded member 460 is screwed into the male threaded portion 432 as shown in FIG. 39(c). The relative position of the bridging portion 24 with respect to the shaft portion 430 may be regulated.

Furthermore, although the shaft portion 430 has been described as having male thread portions 432 and 434 having different directions at one end and the other end, the present invention is not limited to this, and the shaft portion 430 has a right-handed helical groove and a left-handed helical groove. Two types of spiral grooves may be formed overlappingly on the same area. For details of the male thread in which two types of spiral grooves are formed, please refer to Japanese Patent No. 4,663,813 by the inventor of the present invention. When using a shaft portion in which two pairs of such spiral grooves are formed, it is also possible to form the spiral grooves in the entire axial direction of the shaft portion.

The member to which the receiving member of the joint of each embodiment is attached is not limited to the precast floor slab. The attachment target member is not limited in material or shape, and the present invention can be applied to any member as long as the attachment target members can be joined by connecting the receiving members with a connecting member. As the material of the member to be attached, for example, concrete, ceramics, glass, metal, synthetic resin, natural resin, wood, etc., or various composite materials can be used. The shape of the member to be attached may be, for example, a plate shape, a columnar shape, a block shape, or the like, and the present invention can be applied to joining members of the same type or members of different types. Further, it can be applied to all kinds of articles such as precast concrete members in general, furniture in general, building materials, housing frame materials, and various machines.

DESCRIPTION OF SYMBOLS 1... Precast floor slab, 10, 60... Joint, 20... Connecting member, 22... Engaging part, 24... Bridge part, 26... Shaft part, 26a... Male screw part, 26b... Head, 28... Pressing body, 28a... Short side part, 28b...Long side part, 30, 30a...Receiving member, 32...Anchor part, 34...Accommodating part, 34a...Lip part, 34b...Lower end surface, 36...Regulating part, 38...Step part, 40a, 40b , 40c, 40d...Inner peripheral surface, 50...Irregularities on the head side, 52...Irregularities on the bridge part side, 50a, 52a...Slanted surface, 50b, 52b...Vertical surface, 62...Irregularity engaging portion, 62a, 62b...Irregularities, 70... Biasing member, 80... Long connecting member, 80a... Long bridge section, 82... Short connecting member, 82a... Short bridge section, 86... Insertion hole, 88... Male screw pin, 88a... Male screw section, 88b... Head 100, 102...Partial body, 104...Anchor arrangement groove, 106...Joining surface, 120...Lid member, 122...Male thread region, 124...Protrusion, 130...Female thread region.

Claims (14)

a pair of fitting parts provided respectively on a pair of opposing mounting target members;
A joint comprising: a pair of engaging parts that can be fitted into the fitted part; and a connecting member provided with a bridging part that connects the pair of engaging parts,
The opening edge of the fitted part has an installation part in which a lid member can be installed,
The joint is characterized in that the lid member closes the opening of the inserted portion by being installed in the installation portion. 2. The lid member according to claim 1, wherein one end portion of the lid member contacts or presses against the engaging portion fitted into the fitted portion by being installed in the installation portion. Fittings. The lid installation part has a female thread area that opens wider than the inner circumferential surface and forms a female thread surface,
3. The joint according to claim 1, wherein the lid member has a male threaded region on its surface with a male threaded surface that screws into the female threaded surface of the female threaded region. 4. The joint according to claim 1, wherein the fitting portion has an inner circumferential surface that narrows from an opening edge on one end side to the other end side. The connecting member has a shaft portion that is inserted into the bridge portion along the fitting direction of the engaging portion, and an abutment portion that is disposed at one end of the shaft portion. 4. The joint according to any one of 4. 6. The joint according to claim 1, further comprising a fixing part that fixes the engaging part and the inserted part. The fixing part is a male threaded body,
The engaging portion has a hole through which the male threaded body is inserted,
7. The joint according to claim 6, wherein the fitted portion has a female threaded hole into which the male threaded body can be screwed. 8. The joint according to claim 1, wherein the shaft portion is configured to break when a torque and/or axial force exceeding a predetermined value is applied. A method for joining members, the method comprising joining members to be attached to each other using the joint according to any one of claims 1 to 8. A pair of fitting parts each provided on a pair of opposing attachment target members, a pair of engaging parts that can be fitted into the fitting parts, and a connecting member having a bridge part connecting the pair of engaging parts. have,
The connecting member has a shaft portion that can slide in the insertion direction of the engaging portion, and a contact body that can be fixed to the shaft portion,
When disposing the connecting member between the fitting parts, each of the engaging parts is fitted into each of the fitting parts, and the shaft part slides with respect to the bridge part, so that the abutting body Displaced to a point where it comes into contact with the inserted part, and fixed by sandwiching the inserted part between the engaging part and the abutting body,
Providing a recombinable joint on any of a plurality of types of connecting members having bridge portions of different lengths,
A method for joining members, which comprises attaching a connecting member for temporary assembly among the plurality of types of connecting members, and then removing the connecting member for temporary assembly and attaching a connecting member for main assembly. The connection member for temporary assembly has a short bridge portion,
11. The method for joining members according to claim 10, wherein the connecting member for main assembly has an elongated bridge portion. The connection member for temporary assembly has a long bridge portion,
11. The method for joining members according to claim 10, wherein the connecting member for main assembly has a short bridge portion. Distributing a curable fluid between the attachment target members in a state where the attachment target members are connected by the joint to which the temporary assembly connecting member is attached,
The method for joining members according to claim 11 or 12, characterized in that, when the hardening fluid has a hardness above a certain level, the connecting member for temporary assembly in the joint is replaced with the connecting member for main assembly. . Connecting the attachment target members by a plurality of the joints,
Among the plurality of joints, by arranging a joint to which the connection member for temporary assembly is attached and a joint to which the connection member for main assembly is attached, the connection member for main assembly can be elastically deformed. Stretch,
When a curable fluid is disposed between the members to be attached and the curable fluid has a hardness above a certain level, the connecting member for temporary assembly is replaced with the connecting member for main assembly, and the curable fluid is 12. The method for joining members according to claim 11, wherein a prestress is applied to the member.