CN108135364A - Bed apparatus - Google Patents

Abstract

The bed device of the present invention includes: a bed; and a support stand that supports the bed and has a movable mechanism. The movable mechanism has: a receiving portion; a slider fitted into the receiving portion; and a guide member having a guide portion contacting an outer peripheral surface of the sliding body and restricting A restricting part that falls off from the receiving part.

Description

bed device

technical field

The present invention relates to bed arrangements.

This application claims priority based on Japanese Patent Application No. 2015-206433 for which it applied in Japan on October 20, 2015, and uses the content here.

Background technique

As a bed device having a conventional raising and lowering mechanism, for example, a configuration shown in Patent Document 1 below can be cited. This bed apparatus has a structure in which a lifting frame is supported by an X-link type lifting mechanism so as to be able to move up and down. And, by inserting the roller provided on the elevating mechanism side into the guide member provided on the elevating frame side rotatably, the movement of the coupling position between the elevating frame and the elevating mechanism is allowed when the elevating frame is raised and lowered, and both are maintained. state of connection between them.

As the configuration of the roller, for example, configurations shown in FIGS. 14 and 15 can be applied. That is, the roller 1 shown in this figure has: a nut 3 fixed to the end of the connecting rod body 2 of the lifting mechanism; a bolt 4 fixed to the nut 3 by a screw; and a roller body 5 , the roller main body 5 is rotatably supported by the bolt 4 . The nut 3 is welded and fixed in a state of being coaxially inserted into the end portion of the connecting rod body 2 as a pipe. And, the roller main body 5 is a resin molded product having a cylindrical shape, and the roller main body 5 is rotatably supported by the roller bearing surface 4a formed on the peripheral surface of the bolt 4, and the head 4b of the bolt 4 prevents the roller main body 5 from rolling. Roller main body 5 falls off in the axial direction.

By having the above configuration, the roller 1 is mounted in a state where it can roll around the central axis CL of the connecting rod body 2 and the position in the direction of the central axis CL is fixed. Then, by guiding the roller 1 while rolling along the guide member, the connecting rod body 2 is relatively movably connected to the guide member.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2009-207642

The problem to be solved by the invention

However, the roller 1 of the above-mentioned bed apparatus requires two fixing members (nuts 3 and bolts 4) in order to pivotally support one roller body 5, so the number of members is large, and there are also many places where the roller 1 is applied. , Therefore, it becomes a structure that requires a larger number of members, and it is not easy to reduce the cost and weight.

In addition, since welding is required to fix the nut 3 to the connecting rod body 2, the connecting rod body 2 needs to be drilled multiple times (refer to symbol 2a in FIG. 14). That is, when the roller 1 is mounted, (1) firstly, the end of the connecting rod body 2 is drilled for welding a plurality of times, and (2) after that, the nut 3 is coaxially inserted into the end. Fix by welding. And (3) after coaxially inserting the bolt 4 into the roller main body 5, the bolt 4 is fixed with the screw and the nut 3. In this way, at least three steps are required to assemble the roll 1 , and since there are many places where the roll 1 is applied, a large amount of work and cost are required. In addition, when weight reduction is desired for easier transportation of the bed apparatus, the fact that a large number of bolts and nuts mainly made of iron are used is an obstacle.

Contents of the invention

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a bed apparatus capable of reducing both the number of structural members and the number of man-hours for installation, thereby achieving cost reduction and weight reduction.

means to solve the problem

In order to solve the above-mentioned problems and achieve related objects, the present invention adopts the following configurations.

(1) A bed apparatus according to one aspect of the present invention includes: a bed; and a support stand that supports the bed and has a movable mechanism. The movable mechanism has: a receiving portion; a slider fitted into the receiving portion; and a guide member having a guide portion contacting an outer peripheral surface of the sliding body and restricting A restricting portion that falls off from the receiving portion.

According to the bed apparatus of the above-mentioned aspect, installation work can be performed by only one step of fitting the slider to the receiving portion. In addition, the bolts and nuts required in the conventional structure can be eliminated and sliding bodies such as rollers can be installed, and the sliding body can be prevented from falling off by the restricting part. Therefore, the function as the sliding body can be ensured, and the number of components can be greatly reduced to achieve weight reduction. In addition, since nuts required in the conventional structure are unnecessary, welding work for this mounting is also unnecessary, and processing costs can also be significantly reduced.

(2) In the bed device described in (1) above, a structure may be adopted in which the sliding body is a cover covering the receiving portion and has a structure that separates the inner space of the sliding body from the outside air. connected openings.

In this case, the slider is attached to the receiving portion by fitting the slider to the receiving portion so as to cover the cover. At this time, since the opening is provided in the cover, even if the air inside the cover is compressed, the air can pass through the opening and be sent out to the outside. Therefore, no reaction force due to the compression of the air is received during the attachment of the cover, so that the attachment work can be easily performed.

And, for example, when the receiving portion is both ends of a hollow tube, when a cap is fitted on one end side of the hollow tube and then a cap is also fitted on the other end side of the hollow tube, the first fitted end will The side cover will not be pushed out due to the air compression in the hollow tube and fall off. Therefore, the pair of covers (sliders) can be attached reliably in two steps.

(3) In the bed device described in (2) above, a structure may be employed in which the slider is a roller that can rotate freely around a central axis coaxial with the longitudinal direction of the receiving portion, and the Openings are provided around the central axis of the sliding body.

In this case, even if water, for example, enters the cover when cleaning the bed, it can be easily discharged to the outside compared with the case where the opening is provided only on the central axis, thus contributing to the efficiency of cleaning and drying operations.

(4) In the bed device described in any one of (1) to (3) above, a structure may be adopted in which the sliding body has an end wall portion facing the restricting portion, and The peripheral edge of the end wall portion is provided with a chamfer.

In this case, the chamfering can prevent the slider from interfering with the corner formed between the guide portion and the restricting portion of the guide member. That is, in the case where the guide member is manufactured by, for example, bending a sheet of material, the corner portion as a bent portion formed between the guide portion and the restricting portion sometimes has a slightly curved surface, which is easy to contact with the end wall of the sliding body. peripheral interference. On the other hand, by chamfering the end wall portion, it is possible to reliably prevent contact between the slider and the guide member, and ensure smooth sliding of the slider.

(5) In the bed device described in any one of (1) to (4) above, the end edge of the sliding body on the side fitted to the receiving portion may be in contact with the guide The end edge of the part protrudes outward on one surface or relative to the end edge of the guide part.

In this case, even if, for example, a relative inclination occurs between the receiving portion and the guide member, and the end edge of the guide portion comes into contact with the peripheral surface of the receiving portion, it can be moved by sliding between the two. body and reliably prevent direct contact between the two. As a result, damage to both the guide portion and the receiving portion can be prevented.

(6) In the bed device described in any one of (1) to (5) above, the hardness of the slider may be set to be greater than the hardness of the receiving portion and the hardness of the guide member. Either side is lower.

In this case, for example, if the receiving portion or the guide member is made of metal, loss can be reduced compared with a resin-made slider. Thereby, instead of the receiving part and the guide member which are not easy to replace, the easily detachable or attachable and inexpensive slider can be handled as a consumable.

Invention effect

According to the bed device of the above-mentioned aspect of the present invention, both the number of structural members and the number of installation man-hours can be suppressed, and cost reduction can be achieved. In addition, since the number of structural members is reduced compared with the conventional structure, weight reduction can also be achieved.

Description of drawings

FIG. 1 is a plan view of a bed apparatus according to one embodiment of the present invention.

Figure 2 is a side view of the bed unit.

Fig. 3 is an exploded perspective view of a support frame constituting the bed device.

Fig. 4 is a top view of the supporting stand.

Fig. 5 is a side view of the support stand.

Fig. 6 is a side view of the support stand, showing a state in which the main frame is raised by the elevating mechanism.

FIG. 7 is a side view schematically explaining the X-link structure of the support stand.

FIG. 8 is a schematic perspective view for explaining a movable mechanism included in the support frame.

FIG. 9 is a diagram showing a main part of the movable mechanism, and is an enlarged perspective view corresponding to part A in FIG. 8 .

Fig. 10 is a side view of a part of the main part of the movable mechanism viewed in section.

Fig. 11 is a side view showing a modified example of the main part of the movable mechanism.

Fig. 12 is a side view showing another modified example of the main part of the movable mechanism.

FIG. 13 is a diagram showing still another modified example of the main part of the movable mechanism, and corresponds to a view taken along line B-B in FIG. 8 .

Fig. 14 is an exploded perspective view showing the structure of a roller included in a conventional bed device.

Fig. 15 is a longitudinal sectional view of the structure of the roller.

Detailed ways

Hereinafter, one embodiment of the bed apparatus of the present invention will be described with reference to the drawings.

The bed apparatus 10 of the present embodiment can be used in, for example, a medical environment (including a nursing environment). In FIGS. 1 to 7 , arrow H indicates the orientation of the head side when a person (user) is sleeping, and arrow F indicates the orientation of the foot side when the person is sleeping. In the following description, the horizontal direction perpendicular to the front-rear direction which is the direction of the arrows H and F may be referred to as the left-right direction.

As shown in FIGS. 1 to 6 , the bed apparatus 10 includes a bed 11 , a support stand 12 , a drive mechanism 13 , a board 14 , and a control unit 15 . The bed device 10 is a so-called electric bed that uses electricity as a power source.

The bed 11 is longer in the front-rear direction than in the left-right direction in plan view. The bed 11 has a back bottom 16 , a waist bottom 17 , and a leg bottom 18 arranged in this order from the head side H toward the foot side F. As shown in FIG. The leg sole 18 has a knee sole 19 and a foot sole 20 which are arranged in this order from the head side H toward the foot side F. As shown in FIG.

The upper surfaces of the back bottom 16 , the waist bottom 17 , and the leg bottom 18 (the knee bottom 19 and the foot bottom 20 ) each form a part of the bed surface 21 . The back base plate 16 corresponds to the part supporting the user's back on the bed surface 21, the waist base plate 17 corresponds to the part supporting the user's waist on the bed surface 21, and the leg base plate 18 corresponds to the part supporting the user's waist on the bed surface 21. Corresponds to the part of the leg. The knee base 19 corresponds to the part on the bed surface 21 supporting the user from the knee to the waist, and the foot base 20 corresponds to the part on the bed 21 supporting the user from the knee to the toe. The waist bottom panel 17 is configured to be able to expand and contract freely in the front-rear direction. The knee base plate 19 and the foot base plate 20 are rotatably coupled around a flexion axis 22 extending in the left-right direction.

In a standard state before the bed 11 undergoes deformation (for example, rotation with heaving) such as back raising or knee raising by the driving mechanism 13, the bed surface 21 is a horizontal plane. The bed surface 21 is formed in a rectangular shape longer in the front-rear direction than in the left-right direction in this plan view. The long-side direction of the bed surface 21 (bed 11 ) is defined as the front-rear direction, and the short-side direction of the bed surface 21 is defined as the left-right direction. A mattress (not shown) is arranged on the bed surface 21 .

The support frame 12 supports the bed 11 and bears the load of the bed 11 and the load of the user on the bed 11 . In this embodiment, the support frame 12 rotatably supports the back floor 16 and the leg floor 18 (movable floor) around the rotation shafts 23, 24 extending in the left-right direction, and the bed device 10 is a so-called movable backrest bed. The support stand 12 has a base frame 25 , a main frame 26 and an elevating mechanism 27 .

The base frame 25 is installed on the installation surface S and has a rectangular shape in plan view. As shown in FIG. 3 , the base frame 25 has: a first vertical member 28 extending in the front-rear direction; and a first horizontal member 29 extending in the left-right direction.

A pair of 1st vertical member 28 is provided at intervals in the left-right direction.

The first horizontal member 29 spans between a pair of left and right first vertical members 28 and connects these two first vertical members 28 in the left-right direction. A pair of first horizontal members 29 are provided at intervals in the front-rear direction. The first horizontal member 29 is fixed so as not to move relative to the first vertical member 28 .

Ends in the front-rear direction of the first vertical member 28 protrude further outward in the front-rear direction than the first horizontal member 29 , and leg members 30 for installation are attached to the respective end portions. In addition, in this embodiment, although the cover made of polypropylene, for example was used as the leg member 30, casters may be used instead of this cover.

The main frame 26 directly supports the bed 11 . The main frame 26 has a frame portion 31 supporting the bed 11 from below, and an optional portion 32 disposed below the bed 11 and protruding in the left-right direction from the frame portion 31 .

The frame portion 31 has a rectangular shape in plan view. The frame part 31 has the 2nd vertical member 33 (vertical member) extended in the front-back direction, and the 2nd horizontal member 34 (receiving member) extended in the left-right direction.

A pair of second vertical members 33 are provided at intervals in the left-right direction.

The second horizontal member 34 spans between a pair of left and right second vertical members 33 and connects the second vertical members 33 in the left-right direction. A plurality of (five in the illustrated example) second lateral members 34 are provided at intervals in the front-rear direction. The second horizontal member 34 is fixed so as not to move relative to the second vertical member 33 . An end in the front-rear direction of the second vertical member 33 protrudes further in the front-rear direction than the second lateral member 34 , which is the outermost position in the front-rear direction among the plurality of second lateral members 34 .

A pair of left and right optional parts 32 are provided with the frame part 31 sandwiched therebetween, and a pair of left and right optional parts 32 are provided at intervals in the front-rear direction. Each optional part 32 has: a pair of front and rear protruding parts 35 extending from the second vertical part 33 in the left-right direction; Fitted on these two protruding parts 35 in a manner. The option 36 protrudes from the bed 11 in the left-right direction. A not-shown anti-roll fence body is attached to and detached from the option 36 .

The main frame 26 is divided into two in the front-rear direction into a head-side frame 37 and a foot-side frame 38 . In this embodiment, a pair of 2nd vertical member 33 is divided into two into the head side member 33a and the foot side member 33b respectively along the front-back direction. Furthermore, the head side frame 37 is formed by connecting the pair of left and right head side members 33 a with two second horizontal members 34 located on the head side H among the plurality of second horizontal members 34 . Furthermore, the leg side frame 38 is formed by connecting the left and right pair of leg side members 33 b with three second cross members 34 positioned on the leg side F among the plurality of second cross members 34 . The optional parts 32 are arranged as a left and right pair on the head side frame 37 and the foot side frame 38 , respectively.

The head side frame 37 is provided with: a retraction frame 39, which fixes the back chassis 16; and a first rotating member 43, which makes the retraction frame 39 (the back chassis 16) rotate The first rotation shaft 23 rotates. Both the retraction frame 39 and the first rotating member 43 are formed in an inverted U-shape opening toward the head side H in plan view.

The retracting frame 39 has: a pair of floor support parts 40 provided with a spaced apart in the left-right direction; connection between the ends. An end portion of the connecting shaft 41 in the left-right direction protrudes from the floor support portion 40 in the left-right direction.

As shown in FIGS. 3 and 4 , the retraction frame 39 is connected to the main frame 26 via a retraction link 42 . A pair of retraction links 42 are provided across the retraction frame 39 in the left-right direction. The left-right end of the connecting shaft 41 is rotatably connected to the end of the foot side F of each retracting link 42 . The end portion on the head side H of each retracting link 42 is rotatably connected to the main frame 26 via the first rotating shaft 23 . The first rotation shaft 23 rotatably couples the retracting link 42 to the main frame 26 .

As shown in FIGS. 2 to 4 , the first rotating member 43 has: a pair of left and right first push-up arm portions 43 a extending in the front-rear direction along the lower surface of the back chassis 16 ; The first connection part 43b (receiving member) to which the first push-up arm part 43a is connected. The first connecting portion 43b connects the end portions on the foot side F of the first push-up arm portion 43a. The end part of the left-right direction of the 1st connection part 43b protrudes in the left-right direction from the 1st push-up arm part 43a, and is rotatably connected with the 2nd vertical member 33. As shown in FIG. The end portion on the head H side of the first push-up arm portion 43 a is slidably in contact with the lower surface of the chassis support portion 40 .

In the head-side frame 37, by turning the first rotating member 43 upward, the head-side H end of the first push-up arm portion 43a slides relative to the lower surface of the chassis support portion 40, and the first The rotating part 43 pushes up the retracting frame 39 . Then, the retracting link 42 rotates about the first rotating shaft 23 , and the retracting frame 39 rotates about the connecting shaft 41 . Thus, as shown in FIG. 2 , the entire back base plate 16 moves toward the head side H, and the back base plate 16 undulates around the first rotation axis 23 to become a so-called back rising state in which the back base plate 16 is inclined relative to the horizontal plane.

The retracting frame 39 in the back-up state is supported by retracting stays 44 extending in the front-rear direction. The retracting stay 44 is provided between the retracting frame 39 and the second lateral member 34 located on the most head side H among the plurality of second lateral members 34 . The end of the retracting stay 44 on the foot side F is rotatably connected to the retracting frame 39 , and the end of the retracting stay 44 on the head side H is rotatably connected to the second cross member 34 . The retraction stay 44 supports the retraction frame 39 in the back-up state from the head side H obliquely below.

As shown in FIGS. 3 and 4 , the foot side frame 38 is provided with: a fixing part 45 for fixing the leg bottom plate 18 via the second rotation shaft 24; The second rotating part 46 .

The fixing member 45 is provided on the second cross member 34 located on the most head side H among the plurality of second cross members 34 constituting the foot side frame 38 . The fixing member 45 protrudes toward the foot side F from the second cross member 34 . The end portion of the leg bottom plate 18 on the head side H is rotatably fixed to the fixing member 45 via the second rotation shaft 24 .

The second rotating member 46 is rotatably connected to the second vertical member 33 about the push-up shaft 47 . A pair of push-up shafts 47 are provided across the second rotating member 46 in the left-right direction. These two push-up shafts 47 are arranged coaxially with each other.

The second pivot member 46 is formed in an inverted U-shape opening toward the foot side F in plan view. The second rotating member 46 has: a pair of left and right second push-up arm parts 48 extending in the front-rear direction along the lower surface of the leg bottom plate 18; The second connecting portion 49 (receiving member). The second connecting portion 49 connects the head-side H end portions of the pair of left and right second push-up arm portions 48 . The end portion on the head side H of the second push-up arm portion 48 is connected to the second vertical member 33 via the push-up shaft 47 . The end portion of the second push-up arm portion 48 on the foot side F is slidably in contact with the lower surface of the knee bottom plate 19 .

In the foot side frame 38, by turning the second turning member 46 toward the upper side, the end of the foot side F of the second push-up arm portion 48 slides on the lower surface of the knee bottom plate 19, and the second push-up arm portion 48 slides on the lower surface of the knee bottom plate 19. The two rotating parts 46 push up the knee base plate 19 . Then, as shown in FIG. 2, the knee base plate 19 rotates around the first rotation axis 23, and the end of the knee base plate 19 on the foot side F rises. On the other hand, the foot base plate 20 relatively rotates around the flexion axis 22 to become This is a so-called leg-raised state in which the portion of the bed surface 21 corresponding to the knee is bent so as to protrude upward.

In addition, a toe raising stay 50 is provided on the foot bottom plate 20 . The toe-up stay 50 holds the leg bottom plate 18 in the toe-up state. After placing the leg base plate 18 in the leg up state, the leg base plate 18 in the toe up state rotates the foot base plate 20 upward about the flexion axis 22 . The toe-up stay 50 extends in the front-rear direction along the lower surface of the foot sole plate 20 . The end of the toe-up stay 50 on the foot side F is rotatably connected to the foot sole plate 20 . The head-side H end of the toe-up stay 50 is a free end.

In the toe-up stay 50, when the leg base 18 is in the toe-up state, the entire toe-up stay 50 turns downward and extends obliquely downward from the foot base 20 toward the head side H, and the toe-up stay The head-side H end of the bar 50 is engaged with the second vertical member 33 .

Here, an end of the waist bottom panel 17 on the head side H is fixed to the retracting frame 39 , and an end of the waist bottom panel 17 on the foot side F is fixed to the fixing member 45 . When the back bottom plate 16 undulates, the end of the head side H of the waist bottom plate 17 rises and falls together with the back bottom plate 16, and the waist bottom plate 17 bends so as to elongate in the front-rear direction and protrude downward as a whole.

In the support platform 12, the back base plate 16 and the leg base plate 18 are rotated from the above-mentioned standard state by the first rotating part 43 and the second rotating part 46, so that the bed 11 becomes the double-dashed line in Fig. 2 The back rise and the leg rise (knee rise) are shown in use. When the bed 11 is brought into use from the standard state, the user's body can be effectively prevented from shifting relative to the bed apparatus 10 by raising the legs before raising the back.

As shown in FIG. 3 , FIG. 5 and FIG. 6 , the lifting mechanism 27 lifts the main frame 26 relative to the base frame 25 . The lift mechanism 27 employs a so-called X-link structure. The elevating mechanism 27 has a first link 51, a second link 52, and a connecting rod 53 (receiving member).

A pair of first link 51 and second link 52 are provided at intervals in the left-right direction, respectively. Both the first link 51 and the second link 52 extend in the front-rear direction, and the center portions in the front-back direction of the first link 51 and the second link 52 are rotatably connected via a connecting pin 54 .

Four connecting rods 53 are provided. Each connecting rod 53 connects between the front-rear direction end portions of each of the left and right pair of first links 51 , and connects between the respective front-rear direction end portions of each of the left and right pair of second link rods 52 .

Among the four connecting rods 53 , the connecting rod 53 connected to the head-side H end of the first link 51 is rotatably connected to the first vertical member 28 and connected to the head-side H end of the second link 52 . The connecting rod 53 is rotatably connected to the second vertical member 33 .

And, as shown in FIGS. 3 and 7 , among the four connecting rods 53 , the connecting rod 53 (hereinafter also referred to as connecting rod 100 ) connected to the end of the foot side F of the first link 51 extends along it. Direction movement is attached to the upper guide part 55 provided in the 2nd vertical member 33 (it is also called an upper guide 150 hereafter). In addition, a connecting rod 53 (hereinafter also referred to as connecting rod 200 ) connected to the end of the second link 52 on the foot side F is attached to the lower guide provided on the first vertical member 28 so as to be movable along the extending direction. part 56 (hereinafter also referred to as the lower guide 250). The upper guide part 55 and the lower guide part 56 support the connecting rod 53 slidably in the front-rear direction, respectively.

In the lift mechanism 27, when the first link 51 turns upward, the second link 52 also turns upward in conjunction with it. At this time, the end portion (connecting rod 100) on the foot side F of the first link 51 moves while being guided toward the head side H by the upper guide portion 55 (upper guide portion 150), and the end portion (connecting rod 100) of the second link 52 The end portion (connecting rod 200 ) on the foot side F of the body moves while being guided toward the head side H by the lower guide portion 56 (lower guide 250 ). As a result, the first link 51 and the second link 52 rotate and rise, so that the main frame 26 rises relative to the base frame 25 .

In addition, in the present embodiment, the structure of the elevating mechanism 27 (movable mechanism) having the above-mentioned connecting rod 100, upper guide 150, connecting rod 200, and lower guide 250 is particularly distinctive, and details thereof will be described later. Be explained.

As shown in FIGS. 3 and 4 , the drive mechanism 13 is attached to the support stand 12 to move the movable portion 57 which is at least a part of the bed 11 and the support stand 12 . The drive mechanism 13 is a linear actuator that expands and contracts in the front-rear direction, and moves the movable portion 57 by expanding and contracting in the front-rear direction. The driving mechanism 13 has: a bottom plate driving mechanism 58 that rotates the back bottom plate 16 or the leg bottom plate 18 (movable bottom plate) as the movable portion 57; 52 (connecting rod) the connecting rod driving mechanism 59 that rotates.

The bottom plate drive mechanism 58 has: the 1st drive mechanism 58a which turns the back bottom plate 16, and the 2nd drive mechanism 58b which turns the leg bottom plate 18. As shown in FIG.

The first drive mechanism 58a is disposed on a portion of the support frame 12 that is located on the head side H along the front-rear direction. The first drive mechanism 58a rotates the first rotating member 43 upward by extending in the front-rear direction. The first drive mechanism 58a is provided between the second lateral member 34 located on the head side H most among the plurality of second lateral members 34 and the first connection portion 43b. The first drive mechanism 58a is connected to the second horizontal member 34 and the first connecting portion 43b via the mounting members 60 respectively protruding from the second horizontal member 34 and the first connecting portion 43b. The first drive mechanism 58a is rotatably connected to the mounting member 60 .

The second drive mechanism 58 b is arranged at the central portion in the front-rear direction of the support stand 12 . The second drive mechanism 58b rotates the second rotating member 46 upward by extending in the front-rear direction. The second drive mechanism 58 b is provided between the second cross member 34 located on the most head side H among the plurality of second cross members 34 provided on the foot side frame 38 and the second connection portion 49 of the second rotation member 46 . The second drive mechanism 58b is connected to the second horizontal member 34 and the second connecting portion 49 via the mounting members 60 protruding from the second horizontal member 34 and the second connecting portion 49 , respectively. The second drive mechanism 58b is rotatably connected to the mounting member 60 .

The link drive mechanism 59 is disposed on a portion of the support frame 12 located on the foot side F along the front-rear direction. The link drive mechanism 59 rotates the first link 51 upward by extending in the front-rear direction. The link driving mechanism 59 is provided between the first link 51 and the connecting rod 53 (connecting rod 200 ) that connects the end of the first link 51 on the foot side F among the plurality of connecting rods 53 . The link drive mechanism 59 is connected to the connecting rod 53 via a mounting member 60 protruding from the connecting rod 53 . The link drive mechanism 59 is connected to the first link 51 via the conversion mechanism 61 . The conversion mechanism 61 converts the telescopic movement of the link driving mechanism 59 into the rotational movement of the first link 51 . The link drive mechanism 59 is rotatably connected to the attachment member 60 and the conversion mechanism 61 .

As shown in FIGS. 1 and 2 , the board 14 is fixed to the support frame 12 and rises further upward than the bed surface 21 . It has a pair of front and rear boards 14 , and rises from end portions on both sides in the front and rear direction of the second vertical member 33 .

The control unit 15 controls the drive mechanism 13 . The control unit 15 is electrically connected to the drive mechanism 13 . The control unit 15 is electrically connected to a power cord C and an unillustrated operation unit. The control unit 15 is supplied with power from the outside through the power line C, and an instruction from the outside is input through the operation unit. The control unit 15 controls the drive mechanism 13 according to an instruction from the outside.

Next, the connecting rod 100 , the upper guide 150 , the connecting rod 200 , and the lower guide 250 , which are the characteristics of the present embodiment described above, will be described in detail below. In addition, one set of guide mechanisms is constituted by one connecting rod 100 and two upper guides 150 , and similarly, one set of guide mechanisms is constituted by one connecting rod 200 and two lower guides 250 . And, these two sets of guide mechanisms all have the same structure, so the explanation will be given based on one of the guide mechanisms consisting of one connecting rod 100 and two upper guides 150, and the other one consisting of one connecting rod will be omitted. 200 and the guide mechanism constituted by the two lower guides 250 are descriptions of the same structure.

As shown in FIGS. 8 to 10 , the connecting rod 100 has a hollow circular tube 111 long in the left-right direction, and a pair of rollers (sliders) 121 rotatably attached to both ends of the circular tube 111 .

The inner space of the round tube 111 communicates from the one end to the other end. In addition, the circular tube 111 is bent at four places in the longitudinal direction, and as a result, the central part in plan view protrudes further toward the foot side F than the side parts. In addition, both ends of the circular pipe 111 are roller receivers 112 into which the roller 121 is fitted coaxially. The roller receiver 112 has a circular outer peripheral surface 112a when viewed in a cross section perpendicular to the central axis CL along the left-right direction; and a circular inner peripheral surface when viewed in the same cross section. 112b; and an annular end surface 112c. Furthermore, the pair of roller receivers 112 have a common central axis CL. That is, the pair of roller receivers 112 are formed coaxially with each other so as to share the central axis CL, and as a result, the respective outer peripheral surfaces 112a are formed coaxially with each other.

As shown in FIGS. 9 and 10 , the roller 121 has a cylindrical peripheral wall portion 121a coaxial with the central axis CL, and an end wall portion 121b closing one opening of the peripheral wall portion 121a. The roller 121 is a resin molded product, and the peripheral wall part 121a and the end wall part 121b are integrally formed. Further, the roller 121 is fitted coaxially to the roller receiving portion 112 of the round pipe 111 , and is capable of sliding relative to the roller receiving portion 112 around the central axis CL, that is, is rotatable.

The peripheral wall portion 121a has an outer peripheral surface 121a1 that is circular when viewed in a cross section perpendicular to the central axis CL, and an inner peripheral surface 121a2 that is circular when viewed in the same cross section. In addition, the end wall portion 121b is a circular disc when viewed along the central axis CL, and a chamfer 121b1 is formed on the periphery thereof. In addition, four through-holes 121b4 communicating in the range from the inner surface 121b2 toward the outer surface 121b3 are formed in the end wall portion 121b. The through-holes 121b4 are formed at equal angular intervals (90° intervals in the example of this embodiment) around the central axis CL (rolling axis).

This through-hole 121b4 functions as a vent when the roller 121 is externally fitted to both ends of the round pipe 111 . To describe this, when attaching the pair of rollers 121 to the round pipe 111 , first, one roller 121 is externally fitted in the roller receiving portion 112 on one end side of the round pipe 111 . That is, the outer fitting is performed by inserting the roller receiving portion 112 on the one end side into the internal space of the roller 121 . Next, in the same manner, the other roller 121 is externally fitted to the roller receiving portion 112 on the other end side of the round pipe 111 . At this time, the one end side of the round tube 111 is already fitted by the roller 121, and if the through hole 121b4 is not formed, the one end side of the round tube 111 is covered and closed by the roller 121. In this case, when the roller 121 is fitted outside the other end side of the round pipe 111, the air inside the round pipe 111 is compressed, and the roller 121 fitted earlier may be pushed by the air and come off. On the other hand, in this embodiment, since the through-hole 121b4 is formed in the roller 121, the air in the circular pipe 111 can pass through this through-hole 121b4 and escape to outside air, As a result, the above-mentioned situation can be prevented. The roller 121 falls off.

In addition, the number of through holes 121b4 is not limited to four, and may be 1 to 3, or 5 or more. However, the through-holes 121b4 are formed for the purpose of exhaust gas, and it is not preferable to increase the number of them unnecessarily. That is, if the number of through-holes 121b4 formed is too large, the surface area of the outer surface 121b3 of the end wall portion 121b becomes small, and the strength and slidability of the end wall portion 121b itself deteriorate. From such a viewpoint, the number of through-holes 121b4 is preferably 1 to 4.

The material of the roller 121 is most preferably made of resin, but it is not limited to resin, and it can be selected from materials with relatively lower hardness and relatively lower friction coefficient than the metal round pipe 111 or the metal upper guide 150 . choose. More specifically about the hardness, when selecting the material of the roller 121, the hardness of the roller 121 is preferably selected from any of the hardness of the roller receiving portion 112, the hardness of the upper wall 151, the hardness of the lower wall 152, and the hardness of the vertical wall 153. One side is selected among the low material.

By selecting such a material, wear of the outer peripheral surface 112a of the round pipe 111 and wear of the inner surface of the upper guide 150 can be prevented. That is, when the bed 11 is raised and lowered, the round pipe 111 and the roller 121 support the weight of the bed 11 and the user, and the roller 121 rolls coaxially with respect to the round pipe 111, so that the inner peripheral surface 121a2 of the roller 121 is opposite to the roller receiving portion. The outer peripheral surface 112a of 112 is in sliding contact and rolls. At this time, if the hardness of the roller 121 is higher than that of the roller receiving portion 112, the round tube 111 needs to be replaced when the roller receiving portion 112 wears out due to long-term use. However, it is actually not easy to replace such a member. . On the other hand, by making the hardness of the roller 121 relatively lower than the hardness of the roller receiving portion 112 as in the present embodiment, it is possible to wear the roller 121 side instead of the roller receiving portion 112 . Since the roller 121 is a resin molded product, the manufacturing cost is low, and replacement is easy, so a structure with high maintainability is realized. In addition, when the roller 121 is made of a resin molded product, there are also advantages in that the noise during rolling can be made extremely small and that it is superior in terms of weight reduction. In addition, the reason why the hardness of the roller 121 is made relatively lower than the hardness of the upper guide 150 is the same as above.

As shown in FIG. 8 , the upper guides 150 are formed in a set of two and are parallel to each other, and are respectively arranged along the front-rear direction. And, the separation dimension W of the upper guide 150 in the horizontal direction is fixed to a certain dimension.

As shown in FIG. 10 , upper guide 150 has: a pair of upper wall 151 and lower wall 152 parallel to each other; and vertical wall 153 connecting side edges of upper wall 151 and lower wall 152 . The upper wall 151 is a substantially rectangular wall portion long in the front-rear direction, and the roller 121 is in rolling and sliding contact with the lower surface 151 a. Likewise, the lower wall 152 is a substantially rectangular wall portion long in the front-rear direction, and the roller 121 is in rolling and sliding contact with the upper surface 152 a. The vertical wall 153 is a substantially rectangular wall portion long in the front-rear direction, and the outer surface 121b3 of the roller 121 faces the inner surface 153a. In addition, the space defined by the three surfaces of the lower surface 151a, the upper surface 152a, and the inner surface 153a serves as a path for the roller 121 to roll and move.

The upper wall 151, the lower wall 152, and the vertical wall 153 constituting the upper guide 150 are formed by bending a single metal plate. Therefore, as shown in FIG. 10 , a bent portion between the lower surface 151 a of the upper wall 151 and the inner surface 153 a of the vertical wall 153 forms a curved surface. Similarly, a curved portion is also formed between the upper surface 152a of the lower wall 152 and the inner surface 153a of the vertical wall 153 . Since the chamfer 121b1 is formed on the roller 121 with respect to this curved surface, interference when the roller 121 rolls can be avoided, and as a result, the roller 121 can roll smoothly.

Furthermore, as shown in FIG. 10 , the end edge 121e of the roller 121 fitted on the side of the roller receiving portion 112 protrudes outward from the end edge 151e of the upper wall 151 and the end edge 152e of the lower wall 152 . That is, when the roller 121 fitted in the roller receiving portion 112 rolls or slides in the upper guide 150 , at any position in the longitudinal direction of the upper guide 150 , the end edge 121 e of the roller 121 is positioned relative to the upper wall 151 . The end edge 151e of the lower wall 152 and the end edge 152e of the lower wall 152 protrude outward by a remaining dimension m.

According to this structure, even if a relative inclination occurs between the roller receiving portion 112 and the upper wall 151 and the lower wall 152 , the end edge 151 e of the upper wall 151 or the end edge 152 e of the lower wall 152 faces the outer peripheral surface 112 a of the roller receiving portion 112 . To make contact, since the roller 121 protrudes outward by the remaining distance m, direct contact between the two can be reliably prevented. As a result, damage to the roller receiver 112, the upper wall 151, and the lower wall 152 can be prevented.

In addition, the remaining dimension m may be 0 (zero) mm, and the edge 121e of the roller 121 may be on the same surface as the edge 151e of the upper wall 151 and the edge 152e of the lower wall 152 . Also in this case, the same effect can be achieved.

In addition, as described above, since the separation dimension W in the horizontal direction between the two upper guides 150 is fixed at a constant value, it is possible to prevent the roller 121 from coming off from both ends of the round pipe 111 . That is, since the fall of the roller 121 in the direction along the central axis CL is prevented by the inner surface 153a of the vertical wall 153, the fall of the roller 121 is prevented.

In the present embodiment, the roller receiving portion 112 of the round pipe 111 functions as the rotation shaft of the roller 121, and the inner surface 153a of the vertical wall 153 acts as a fall-off stopper for the roller 121 (conventional structure using bolts and nuts). In addition, since the load received by the roller 121 is received by the metal roller receiver 112 , there is an effect that deformation of the roller 121 is less likely to occur even if it is a resin molded product. Therefore, smooth rolling like conventional ones can be achieved by the roller 121 having a structure with an extremely small number of components.

In addition, the connection structure between the connection rod 200 and the lower guide 250 is also the same as the connection structure between the connection rod 100 and the upper guide 150 described above, and thus repeated description thereof will be omitted here.

The main points of the bed apparatus of this embodiment having the results described above will be summarized below.

which is,

(1) The bed device 10 of the present embodiment includes a bed 11 and a support stand 12 that supports the bed 11 and has an elevating mechanism 27 as a movable mechanism. And, lifting mechanism 2 has: roller receiving portion 112; Roller 121, and this roller 121 fits in roller receiving portion 112; 152 and the vertical wall 153 have a lower surface 151a and an upper surface 152a as a guide portion (or guide surface) that contact the outer peripheral surface 121a1 of the roller 121, and an inner surface 153a as a restricting portion that restricts the fall of the roller 121 from the roller receiving portion 112. .

In addition, according to the bed device 10 , an installation operation can be performed only by one step of fitting the roller 121 to the roller receiving portion 112 . In addition, the roller 121 can be installed without bolts or nuts required in the conventional structure, and the inner surface 153a prevents the roller 121 from falling off, so that the function as the roller 121 can be ensured, and the number of components can be greatly reduced to achieve weight reduction. In addition, since nuts required in the conventional structure are unnecessary, welding work for this mounting is also unnecessary, and processing costs can also be significantly reduced.

Therefore, according to the bed apparatus 10 of the present embodiment, both the number of structural members and the number of installation man-hours can be suppressed, and cost reduction can be achieved. In addition, since the number of structural members is reduced compared with the conventional structure, weight reduction can also be achieved.

(2) In the bed apparatus 10 described in (1) above, the roller 121 is a cover covering the roller receiver 112 and has an opening (through hole 121b4 ) communicating between the internal space of the roller 121 and the outside air. In addition, the through hole 121b4 also has the function of communicating the air inside and outside at the open end of the circular tube 111 .

According to this configuration, the roller 121 is attached to the roller receiving portion 112 by fitting the roller 121 to the roller receiving portion 112 so that the cover is covered. Since the through hole 121b4 is provided in the roller 121, even when the The air in the roller 121 is compressed during installation, and the air can also pass through the opening and be sent out to the outside. Therefore, since the reaction force due to the compression of the air is not received when the roller 121 is mounted, the mounting work can be easily performed.

(3) In the bed apparatus 10 described in (2) above, a plurality of (four locations) of the openings (through holes 121 b 4 ) are provided around the central axis CL of the roller 121 .

According to this configuration, even if water enters the roller 121, it can be easily discharged to the outside compared with the case where the through hole 121b4 is provided only at the position of the central axis CL, thus contributing to the efficiency of washing and drying operations. In addition, the number of formations is not limited to four locations, and only one location may be formed around the central axis CL, for example.

(4) In the bed apparatus 10 described in any one of (1) to (3) above, the roller 121 has an end wall portion 121b facing the restricting portion, and chamfers are provided on the periphery of the end wall portion 121b. 121b1.

According to this structure, the contact of the roller 121 with respect to each corner|angular part between the upper wall 151 and the lower wall 152 with respect to the vertical wall 153 can be prevented reliably, and the rolling or sliding of the roller 121 can be ensured smoothly.

(5) In the bed device 10 described in any one of (1) to (4) above, the end edge 121e of the roller 121 fitted on the side of the roller receiving portion 112 and the upper wall 151 and the lower wall 152 Each end edge 151e, 152e of the upper wall 151 and each end edge 152e of the lower wall 152 protrude outward on one surface or with respect to each end edge 151e, 152e of the upper wall 151 and the lower wall 152 .

According to this structure, even if, for example, a relative inclination occurs between the roller receiving portion 112 and the upper wall 151 and the lower wall 152, the peripheral wall portion 121a of the roller 121 sandwiched between the two can reliably prevent the gap between the two. direct contact. As a result, damage to the roller receiver 112, the upper wall 151, and the lower wall 152 can be prevented.

(6) In the bed device described in any one of (1) to (5) above, the hardness of the roller 121 is lower than either of the hardness of the roller receiver 112 and the hardness of the upper guide 150 .

According to this configuration, instead of the metal roller receiving portion 112 and the upper guide 150 which are difficult to replace, the cheap roller 121 which is easy to detach or attach can be handled as a consumable.

One embodiment of the present invention has been described above, but it goes without saying that the present invention is not limited to the above configuration.

For example, in this embodiment a pair of upper wall 151 and lower wall 152 are used, but depending on the application of the present invention, the lower wall 152 may be omitted as shown in FIG. 11 and only the upper wall 151 and the vertical wall 153 may be used.

In addition, in this embodiment, the structure in which the roller 121 is provided on the round pipe 111 and the upper guide 150 is provided on the foot side member 33b is adopted, but the roller 121 may be installed as shown in FIG. 121 is provided on the foot side member 33 b and the upper guide 150 is provided on the round pipe 111 . In this case, it is necessary to weld and fix the new round pipe 111A for installing the roller 121 on the foot member 33b to the foot member 33b.

In addition, in the present embodiment, the roller 121 is configured to roll in the upper guide 150 , but a configuration in which the roller 121 does not roll in the upper guide 150 may be employed. For example, as shown in FIG. 13 , it is also possible to employ a roller 121A having a substantially square shape when viewed along the central axis CL. In this case, the roller 121A does not roll but only slides within the upper guide 150 , but rolls relatively to the round pipe 111 .

In addition, in this embodiment, the example in which the roller 121 is externally fitted in the roller receiving portion 112 has been described, but it is not limited to this structure, and the roller 121 may be embedded in the roller receiving portion 112, or the roller 121 may be externally fitted in the roller receiving portion 112. The roller receiver 112 is also embedded in the roller receiver 112 .

In addition, in this embodiment, the case where the receiving parts of the roller 121 are used as both ends of the round pipe 111 has been described as an example, but instead of the round pipe 111, both ends of a solid rod may be used as the receiving parts. The rollers 121 are installed respectively.

In addition, in this embodiment, as long as the lower surface 151a of the upper wall 151 as a guide member is in contact with at least a part of the outer peripheral surface 121a1 of the roller 121 in the width direction, it can serve as a guide for guiding the rolling or sliding direction of the roller 121. part to function. Therefore, even if, as shown in FIG. 10, for example, the lower surface 151a is in contact with a main part of the outer peripheral surface 121a1 in the width direction (direction along the central axis CL) of the roller 121, but not in contact with other parts of the outer peripheral surface 121a1. structure, the lower surface 151a can also reliably function as a guide. On the contrary, it is needless to say that the lower surface 151a may be in contact with the entire width direction of the outer peripheral surface 121a1 of the roller 121 .

The upper surface 152a of the lower wall 152 serving as a guide member is also the same as the above-mentioned lower surface 151a. That is, the upper surface 152a can function as a guide for guiding the rolling or sliding direction of the roller 121 as long as it is in contact with at least a part of the outer peripheral surface 121a1 of the roller 121 in the width direction. Moreover, in the longitudinal section shown in FIG. 10 , regarding the width dimension along the central axis CL, the outer peripheral surface 121a1 may be longer than the lower surface 151a, or equal, or even the lower surface 151a may be longer than the outer peripheral surface 121a1.

Moreover, in this embodiment, as shown in FIG. 10, the inner surface 153a of the vertical wall 153 which is a guide member is in sliding contact with the whole surface of the outer surface 121b3 of the roller 121, but it is not limited to this structure. That is, as long as the inner surface 153a is in contact with at least a part of the outer surface 121b3 of the roller 121, it can function as a restricting part which restricts the falling of the roller 121. For example, in a modified example shown in FIG. 11 , the vertical wall 153 may be shortened in width in the vertical direction on the paper, and may be in sliding contact with only a part (upper portion) of the outer surface 121b3 of the roller 121 .

In addition, in this embodiment, play (gap) for smooth rolling (or sliding) of the roller 121 is provided between the outer peripheral surface 121a1 of the roller 121 and the lower surface 151a and the upper surface 152a. Therefore, sometimes the outer peripheral surface 121a1 of the roller 121 is temporarily separated from the lower surface 151a and the upper surface 152a due to the rolling (or sliding) state of the roller 121. It is within the scope of the present invention that the upper surface 152a contacts and guides.

Similarly, play (gap) for smooth rolling (or sliding) of the roller 121 is provided between the outer surface 121b3 of the roller 121 and the inner surface 153a of the vertical wall 153 . Therefore, sometimes the outer surface 121b3 of the roller 121 is temporarily separated from the inner surface 153a due to the rolling (or sliding) state of the roller 121. A structure for preventing the roller 121 from coming off falls within the scope of the present invention.

In addition, the constituent elements of the above-described embodiments may be appropriately replaced with known constituent elements, and the above-described modified examples may be appropriately combined within a range not departing from the gist of the present invention.

Industrial availability

According to the bed apparatus according to the above-mentioned embodiment of the present invention, it is possible to reduce both the number of structural members and the number of installation man-hours, thereby achieving cost reduction. In addition, since the number of structural members is reduced compared with the conventional structure, weight reduction can also be achieved.

Symbol Description

10 bed unit

11 beds

12 Support stand

27 Lifting mechanism (movable mechanism)

111 round tube (hollow tube)

112 Roller receiving part (receiving part)

121 roller (sliding body)

121a peripheral wall

121a1 The outer peripheral surface of the roller

121b1 Chamfer

121b4 through hole (opening)

151, 152, 153 upper wall, lower wall, vertical wall (guide part)

151a, 152a lower surface, upper surface (guide part)

153a Inner surface (restricted part)

CL central axis

Claims (6)

1. a kind of bed apparatus, which is characterized in that the bed apparatus has：

Bed；And

Pallet is supported, which supports the bed and has movable agency,

The movable agency has：

Carrier；

Slide mass, the slide mass are embedded in the carrier；And

Guiding parts, the guiding parts have the guide part contacted with the peripheral surface of the slide mass and the limitation slide mass From the limiting unit to come off of the carrier.

2. bed apparatus according to claim 1, which is characterized in that

The slide mass is the lid for coating the carrier,

The slide mass has the opening that will be connected between the inner space of the slide mass and outer gas.

3. bed apparatus according to claim 2, which is characterized in that

The slide mass be around with the long side direction of the carrier in the roller of coaxial center axis thereof freely,

The opening is arranged on around the central axis of the slide mass.

4. the bed apparatus described in any one in claims 1 to 3, which is characterized in that

The slide mass has the end wall opposite with the limiting unit,

The periphery of the end wall is provided with chamfering.

5. the bed apparatus described in any one in Claims 1-4, which is characterized in that

The ora terminalis of the side for being embedded in the carrier of the slide mass and the ora terminalis of the guide part on one face or It is stretched out outward relative to the ora terminalis of the guide part.

6. the bed apparatus described in any one in claim 1 to 5, which is characterized in that

The hardness of the slide mass is all lower than the either side in the hardness of the carrier and the hardness of the guiding parts.