CN108135364B - bed unit - Google Patents

Abstract

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

Description

bed unit

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 the content is incorporated herein by reference.

Background technique

As a bed apparatus having a conventional elevating mechanism, the structure shown in the following patent document 1 can be mentioned, for example. This bed apparatus has a structure in which the lifting frame is supported by an X-link type lifting and lowering mechanism so as to be able to rise and fall. In addition, by inserting the rollers provided on the lift mechanism side into the guide members provided on the lift frame side in a rolling manner, the movement of the connection position between the lift frame and the lift mechanism when the lift frame is raised and lowered is allowed, and both are maintained. the state of the connection between them.

As the configuration of the roller, for example, the configuration shown in FIGS. 14 and 15 can be applied. That is, the roller 1 shown in the figure includes: a nut 3 fixed to the end of the connecting rod body 2 of the elevating mechanism; a bolt 4 fixed to the nut 3 by a screw; and a roller main body 5 , the roller 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 serving as a pipe. The roller main body 5 is a resin molded product having a cylindrical shape, and the roller main body 5 is pivotally supported by the roller bearing surface 4a formed on the peripheral surface of the bolt 4 so as to be rotatable, and the head portion 4b of the bolt 4 prevents the roller main body 5 from being rolled. The roller main body 5 comes off in the axial direction.

By having the above-mentioned structure, the roller 1 is attached in a state in which the position in the direction of the center axis CL is fixed in a rollable state around the center axis CL of the connecting rod body 2 . Then, by being guided while rolling along the guide member, the connecting rod 2 is connected to the guide member so as to be movable relative to the guide member.

prior art literature

Patent Literature

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

The problem to be solved by the invention

However, the roll 1 of the above-described bed apparatus requires two fixing members (nuts 3 and bolts 4) in order to pivotally support one roll body 5, so the number of members is large, and the roll 1 has many application sites. , so it becomes a structure that requires a larger number of components, and it is not easy to reduce 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 several times (see reference numeral 2a in FIG. 14). That is, when the roller 1 is attached, (1) first, the end portion of the connecting rod body 2 is subjected to a plurality of drilling processes for welding operations, and (2) the nut 3 is then coaxially inserted into the end portion. Weld to fix. Then, (3) after the bolts 4 are coaxially inserted into the roller body 5, the bolts 4 are fixed to the nuts 3 with screws. In this way, at least three steps are required to assemble the roll 1, and since there are a plurality of application parts of the roll 1, a large amount of work and cost are required. Furthermore, when weight reduction is desired for easier transportation of the bed apparatus, etc., the use of a large number of bolts and nuts mainly made of iron is an obstacle.

SUMMARY OF THE INVENTION

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

Means for solving problems

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

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

According to the bed apparatus of the above aspect, the installation work can be performed only by the step of fitting the sliding body to the receiving portion. Furthermore, sliding bodies such as rollers can be attached without bolts or nuts required in the conventional structure, and the sliding body can be prevented from falling out by the restricting portion, so that the function as a sliding body can be ensured, the number of components can be greatly reduced, and weight can be reduced. In addition, since the nut required in the conventional structure is not required, the welding work for this mounting is also not required, and the processing cost can also be greatly reduced.

(2) In the bed apparatus described in the above (1), the sliding body may be a cover covering the receiving portion, and the sliding body may have a space between the inner space of the sliding body and the outside air. Connected openings.

In this case, the attachment of the sliding body to the receiving portion is performed by fitting the sliding body 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 in the cover is compressed, the air can be sent to the outside through the opening. Therefore, the reaction force due to the compression of the air at the time of attaching the cover is not received, so that the attaching work can be easily performed.

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

(3) In the bed apparatus described in the above (2), a configuration may be adopted in which the sliding body is a roller that is rotatable 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, compared with the case where the opening is provided only on the central axis, even if water or the like enters the cover during bed cleaning, it is easily discharged to the outside, thereby contributing to the efficiency of cleaning and drying operations.

(4) In the bed apparatus according to any one of the above (1) to (3), the sliding body may have an end wall portion facing the restricting portion, and the sliding body may have an end wall portion facing the restricting portion, and the 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 portion formed between the guide portion and the restricting portion of the guide member. That is, when the guide member is produced by, for example, bending a sheet of material, the corner portion as the curved portion formed between the guide portion and the restricting portion may have a slightly curved surface, which is easy to connect with the end wall of the sliding body. peripheral interference. On the other hand, by chamfering the end wall portion, the contact between the sliding body and the guide member can be reliably prevented, and smooth sliding of the sliding body can be ensured.

(5) In the bed apparatus according to any one of the above (1) to (4), an end edge of the sliding body on the side fitted to the receiving portion may be connected to the guide. The end edge of the guide portion protrudes outward on one surface or relative to the end edge of the guide portion.

In this case, for example, even if a relative inclination occurs between the receiving portion and the guide member, and the end edge of the guide portion is brought into contact with the peripheral surface of the receiving portion, sliding between the two is possible. Physically 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 apparatus according to any one of (1) to (5) above, the hardness of the sliding body may be set to be higher than the hardness of the receiving portion and the hardness of the guide member. either side is low.

In this case, if the receiving portion and the guide member are made of metal, for example, the loss can be reduced compared with the sliding body made of resin. Thereby, it is possible to handle the inexpensive sliding body which is easy to detach or attach, as a consumable, instead of the receiving part or the guide member which is not easy to replace.

Invention effect

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

Description of drawings

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

Figure 2 is a side view of the bed unit.

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

FIG. 4 is a plan view of the support stand.

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

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

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

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

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

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

FIG. 11 is a side view showing a modification of the main part of the movable mechanism.

FIG. 12 is a side view showing another modification of the main part of the movable mechanism.

FIG. 13 is a view showing still another modification of the main part of the movable mechanism, and is a view corresponding to a view taken along the line B-B of FIG. 8 .

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

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 accompanying drawings.

The bed apparatus 10 of the present embodiment can be used, for example, in a medical environment (including a nursing care environment). In FIGS. 1 to 7 , arrow H represents the orientation of the head side when a person (user) sleeps, and arrow F represents the orientation of the foot side when the person sleeps. 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 plate 14 , and a control unit 15 . The bed apparatus 10 is a so-called electric bed using electric power as a power source.

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

The upper surface of the back panel 16 , the upper surface of the waist panel 17 , and the upper surfaces of the leg panels 18 (knee panels 19 and foot panels 20 ) respectively form a part of the bed surface 21 . The back bottom plate 16 corresponds to the part of the bed surface 21 that supports the back of the user, the waist bottom plate 17 corresponds to the part of the bed surface 21 that supports the user's waist, and the leg bottom plate 18 corresponds to the part of the bed surface 21 that supports the user's waist. The parts of the legs correspond. The knee bottom plate 19 corresponds to the part of the bed surface 21 that supports the user from the knees to the waist, and the foot bottom plate 20 corresponds to the part of the bed surface 21 that supports the user from the knees to the toes. The waist bottom plate 17 is configured to be expandable and contractible in the front-rear direction. The knee bottom plate 19 and the foot bottom plate 20 are rotatably connected to a flexion shaft 22 extending in the left-right direction.

The bed surface 21 is a horizontal plane in a standard state before the drive mechanism 13 causes the bed 11 to perform deformation such as back-up or knee-up (for example, rotation with ups and downs). 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. Let the longitudinal direction of the bed surface 21 (the bed 11 ) be the front-rear direction, and the short-side direction of the bed surface 21 is the left-right direction. A mattress not shown is arranged on the bed surface 21 .

The support stand 12 supports the bed 11 and receives the load of the bed 11 and the load of the user on the bed 11 . In the present embodiment, the support stand 12 rotatably supports the back bottom plate 16 and the leg bottom plate 18 (movable bottom plate) around pivot shafts 23 and 24 extending in the left-right direction, and the bed apparatus 10 is a so-called movable back bed. The support stand 12 has a base frame 25 , a main frame 26 , and a lift mechanism 27 .

The base frame 25 is provided on the installation surface S, and has a rectangular shape in a plan view. As shown in FIG. 3, the base frame 25 has the 1st vertical member 28 extended in the front-back direction, and the 1st horizontal member 29 extended in the left-right direction.

A pair of first vertical members 28 are provided at intervals in the left-right direction.

The first horizontal member 29 is spanned between the pair of left and right first vertical members 28, and connects the two first vertical members 28 in the left-right direction. A pair of first lateral members 29 are provided at intervals in the front-rear direction. The first horizontal member 29 is fixed to be immovable with respect 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 transverse member 29 , and leg members 30 for installation are attached to the respective ends. In addition, in the present embodiment, a cover made of polypropylene, for example, is used as the leg member 30, but casters may be used instead of the cover.

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

The frame portion 31 has a rectangular shape in plan view. The frame portion 31 includes a second vertical member 33 (vertical member) extending in the front-rear direction, and a second lateral member 34 (receiving member) extending 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 is spanned 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 to be immovable with respect to the second vertical member 33 . The end of the second vertical member 33 in the front-rear direction is further protruded in the front-rear direction than the second horizontal member 34 at the outermost position in the front-rear direction among the plurality of second horizontal members 34 .

The optional portion 32 is provided as a pair on the left and right with the frame portion 31 sandwiched therebetween, and a pair of the optional portion 32 on the left and right is 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 longitudinal part 33 in the left-right direction; mounted on these two protruding parts 35 . The option 36 protrudes from the bed 11 in the left-right direction. A fence body for rolling-off prevention (not shown) is attached to and detached from the option 36 .

The main frame 26 is divided into a head-side frame 37 and a foot-side frame 38 in two along the front-rear direction. In this embodiment, a pair of 2nd vertical member 33 is divided|segmented into the head side member 33a and the leg side member 33b in the front-back direction, respectively. And the head side frame 37 is formed by connecting a pair of left and right head side members 33a by the two second transverse members 34 located on the head side H among the plurality of second transverse members 34. Furthermore, the leg side frame 38 is formed by connecting a pair of left and right leg side members 33 b by three second transverse members 34 located on the leg side F among the plurality of second transverse members 34 . The optional parts 32 are arranged in pairs 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 that fixes the back base plate 16; and a first rotation member 43 that allows the retraction frame 39 (the back base plate 16) to be wound around The first rotating shaft 23 rotates. Both the retracting frame 39 and the first rotating member 43 are formed in an inverted U-shape that opens toward the head side H in a plan view.

The retractable frame 39 includes a pair of bottom plate support portions 40 provided with a space between them in the left-right direction, and a connecting shaft 41 that connects the foot side F of the bottom plate support portion 40 in the front-rear direction. connection between the ends. The left-right direction end part of the connection shaft 41 protrudes from the bottom plate support part 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 the retraction link 42 . A pair of retraction links 42 are provided so as to sandwich the retraction frame 39 in the left-right direction. The left-right direction end of the connection shaft 41 is rotatably connected to the end of the leg side F of each retraction 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 rotating shaft 23 rotatably connects the retracting link 42 and the main frame 26 .

As shown in FIGS. 2 to 4 , the first rotating member 43 includes: 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 bottom plate 16 ; The first connecting portion 43b (receiving member) to which the first push-up arm portion 43a is connected. The 1st connection part 43b connects between the edge parts of the leg side F of the 1st push-up arm part 43a. The left-right direction end part of the 1st connection part 43b protrudes in the left-right direction from the 1st push-up arm part 43a, and is connected with the 2nd vertical member 33 so that rotation is free. The end portion on the head side H of the first push-up arm portion 43 a is in slidable contact with the lower surface of the bottom plate support portion 40 .

In the head-side frame 37, by rotating the first rotating member 43 toward the upper side, the end portion of the head-side H of the first push-up arm portion 43a is slid with respect to the lower surface of the base plate support portion 40, and the first The rotating member 43 pushes up and retracts the frame 39 . Then, the retraction link 42 is rotated around the first rotation shaft 23 , and the retraction frame 39 is rotated around the connection shaft 41 . As a result, as shown in FIG. 2 , the entire back base 16 moves toward the head side H, and the back base 16 undulates and rotates around the first pivot shaft 23 , so that the back base 16 is inclined with respect to the horizontal plane in a so-called back raised state.

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

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

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

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

The second rotating member 46 is formed in an inverted U-shape open to the leg side F in a plan view. The second rotating member 46 includes a pair of left and right second push-up arm portions 48 extending in the front-rear direction along the lower surface of the leg bottom plate 18 , and a pair of left and right second push-up arm portions 48 connected in the left-right direction. the second connecting part 49 (receiving member). The second connecting portion 49 connects the ends of the head side H 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 foot side F of the second push-up arm portion 48 is in slidable contact with the lower surface of the knee bottom plate 19 .

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

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

In the above-mentioned toe raising stay 50, when the leg base plate 18 is in the toe raising state, the toe raising stay 50 as a whole rotates downward to extend obliquely downward from the foot base 20 toward the head side H, and the toe raising stay The end of the head side H of the bar 50 is locked to the second vertical member 33 .

Here, the end portion on the head side H of the waist bottom plate 17 is fixed to the retraction frame 39 , and the end portion of the waist bottom plate 17 on the foot side F is fixed to the fixing member 45 . When the back bottom plate 16 undulates and rotates, 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 as a whole is elongated in the front-rear direction and curved so as to protrude downward.

In the support stand 12, the back base plate 16 and the leg base plate 18 are rotated from the above-mentioned standard state by the first rotating member 43 and the second rotating member 46, so that the bed 11 is formed by the two-dot chain line in FIG. 2 . Shown with back up and legs up (knees up). When the bed 11 is brought into the use state from the standard state, the user's body can be effectively prevented from being displaced with respect to the bed apparatus 10 by raising the legs before raising the back.

As shown in FIGS. 3 , 5 and 6 , the lift mechanism 27 lifts and lowers the main frame 26 relative to the base frame 25 . The lift mechanism 27 adopts 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 the first link 51 and the 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-rear direction of each of the first link 51 and the second link 52 are rotatably connected via a connection pin 54 .

Four connecting rods 53 are provided. Each connecting rod 53 connects the both ends of the pair of left and right first links 51 in the front-rear direction, and connects the both ends of the pair of left and right second links 52 in the front-rear direction.

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

Furthermore, as shown in FIGS. 3 and 7 , among the four connecting rods 53 , the connecting rod 53 (hereinafter, also referred to as a connecting rod 100 ) connected to the end portion of the leg side F of the first link 51 extends along the same. It is attached to the upper guide part 55 (henceforth, also called the upper guide 150) provided in the 2nd vertical member 33 so that direction movement is possible. In addition, a connecting rod 53 (hereinafter, also referred to as a connecting rod 200 ) connected to the end of the leg side F of the second link 52 is movably attached to a lower guide provided in the first vertical member 28 along the extending direction thereof. part 56 (hereinafter, also referred to as lower guide 250). The upper guide portion 55 and the lower guide portion 56 respectively support the connecting rod 53 slidably in the front-rear direction.

In the elevating mechanism 27, when the first link 51 is rotated upward, the second link 52 is also rotated upward in conjunction with it. At this time, the end portion (connecting rod 100 ) of 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 ). The end portion (connecting rod 200 ) on the foot side F of the pair moves while being guided toward the head side H by the lower guide portion 56 (lower guide 250 ). As a result, since the first link 51 and the second link 52 are rotated and raised, the main frame 26 is raised 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 characteristic, and the details of these will be described later. Be explained.

As shown in FIGS. 3 and 4 , the drive mechanism 13 is attached to the support frame 12 to move the movable portion 57 which is at least a part of the bed 11 and the support frame 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 extending and contracting in the front-rear direction. The drive mechanism 13 includes: a bottom plate drive mechanism 58 for rotating the back bottom plate 16 or the leg bottom plate 18 (movable bottom plate) as the movable part 57 ; and the first link 51 or the second link as the movable part 57 . 52 (link) is a link drive mechanism 59 that rotates.

The bottom plate drive mechanism 58 includes: a first drive mechanism 58 a for rotating the back bottom plate 16 ; and a second drive mechanism 58 b for rotating the leg bottom plate 18 .

The 1st drive mechanism 58a is arrange|positioned in the part located in the head side H along the front-back direction of the support stand 12. As shown in FIG. The first drive mechanism 58a rotates the first rotating member 43 toward the upper side by extending in the front-rear direction. The first drive mechanism 58a is provided between the second lateral member 34 located on the most head side H among the plurality of second lateral members 34 and the first connection portion 43b. The first drive mechanism 58a is coupled to the second lateral member 34 and the first coupling portion 43b via the attachment members 60 protruding from the second lateral member 34 and the first coupling portion 43b, respectively. The first drive mechanism 58a is rotatably coupled to the attachment member 60 .

The 2nd drive mechanism 58b is arrange|positioned in the center part of the front-back direction in the support stand 12. As shown in FIG. The second drive mechanism 58b rotates the second rotating member 46 toward the upper side by extending in the front-rear direction. The second drive mechanism 58b is provided between the second lateral member 34 located on the most head side H among the plurality of second lateral members 34 provided in the foot side frame 38 and the second connecting portion 49 of the second rotating member 46 . The second drive mechanism 58b is coupled to the second lateral member 34 and the second coupling portion 49 via the attachment members 60 protruding from the second lateral member 34 and the second coupling portion 49, respectively. The second drive mechanism 58b is rotatably coupled to the attachment member 60 .

The link drive mechanism 59 is arranged at a portion of the support stand 12 located on the leg side F along the front-rear direction. The link drive mechanism 59 is extended in the front-rear direction to rotate the first link 51 toward the upper side. The link drive mechanism 59 is provided between the first link 51 and the connecting rod 53 (the connecting rod 200 ) that connects the end portion of the foot side F of the first link 51 among the plurality of connecting rods 53 . The link drive mechanism 59 is connected to the connecting rod 53 via the attachment 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 motion of the link driving mechanism 59 into the rotational motion 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 plate 14 is fixed to the support stand 12 and raised further upward than the bed surface 21 . A pair of front and rear plates 14 are provided, and are raised from both ends of the second vertical member 33 in the front-rear direction.

The control unit 15 controls the drive mechanism 13 . The control unit 15 is electrically connected to the drive mechanism 13 . The power cord C and an operation unit (not shown) are electrically connected to the control unit 15 . Power is supplied to the control unit 15 from the outside via the power cord C, and an instruction from the outside is input via the operation unit. The control unit 15 controls the drive mechanism 13 in accordance with 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 features of the above-described present embodiment will be described in detail below. In addition, a set of guide mechanisms is constituted by one connecting rod 100 and two upper guides 150 , and a set of guiding mechanisms is similarly constituted by one connecting rod 200 and two lower guides 250 . In addition, since these two sets of guide mechanisms have the same structure, the description will be based on the guide mechanism composed of one connecting rod 100 and two upper guides 150 on one of them, and the other one composed of one connecting rod will be omitted. 200 and the guide mechanism constituted by the two lower guides 250 are described as having the same structure.

As shown in FIGS. 8 to 10 , the connecting rod 100 includes 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 circular tube 111 is communicated in a range from the one end to the other end. Further, the circular tube 111 is bent at four locations in the longitudinal direction, and as a result, the central portion in a plan view protrudes toward the leg side F further than the both side portions thereof. In addition, both ends of the circular tube 111 are roller receiving portions 112 on which the rollers 121 are coaxially fitted. The roller receiving portion 112 has an outer peripheral surface 112a that is circular when viewed in a cross section perpendicular to the center axis CL in the left-right direction, and an inner peripheral surface that is circular when viewed in the same cross section 112b; and an annular end face 112c. In addition, the pair of roller receiving portions 112 have a common central axis CL. That is, the pair of roller receiving portions 112 are formed to be coaxial with each other so as to share the central axis CL, and as a result, the respective outer peripheral surfaces 112a are formed to be coaxial with each other.

As shown in FIGS. 9 and 10 , the roller 121 has a cylindrical peripheral wall portion 121a that is coaxial with the central axis CL, and an end wall portion 121b that closes one opening of the peripheral wall portion 121a. The roller 121 is a resin molded product, and the peripheral wall portion 121a and the end wall portion 121b are integrally formed. The roller 121 is coaxially fitted to the roller receiving portion 112 of the round tube 111, and is slidable about the center axis CL relative to the roller receiving portion 112, that 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 plate having a circular shape when viewed along the central axis CL, and a chamfer 121b1 is formed on the peripheral edge thereof. Moreover, four through-holes 121b4 communicating in the range from the inner surface 121b2 toward the outer surface 121b3 are formed in the end wall part 121b. The through-holes 121b4 are formed around the central axis CL (rolling axis) at equal angular intervals (90-degree intervals in the example of the present embodiment).

The through-holes 121b4 function as vents when the rollers 121 are fitted to both ends of the circular pipe 111. Here, when attaching the pair of rollers 121 to the round pipe 111 , first, one roll 121 is fitted to the roll receiving portion 112 on the 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 inner space of the roller 121 . Next, similarly, the other roller 121 is externally fitted to the roller receiving portion 112 on the other end side of the circular tube 111 . At this time, the roller 121 is already fitted on the one end side of the round pipe 111, and if the through hole 121b4 is not formed, the one end side of the round pipe 111 is covered by the roller 121 to be in a closed state. In this case, when the roller 121 is fitted on the other end side of the round tube 111, the air inside the round tube 111 is compressed, and the roller 121 fitted earlier may be pushed by the air and fall off. On the other hand, in the present embodiment, since the through hole 121b4 is formed in the roller 121, the air in the circular pipe 111 can pass through the through hole 121b4 to escape to the outside air, and as a result, the above-mentioned can be prevented. of the roller 121 comes off.

In addition, the number of through-holes 121b4 is not limited to four, and may be one to three, or five or more. However, the through-holes 121b4 are formed for the purpose of exhausting, and it is not preferable that the number of the through-holes 121b4 be increased unnecessarily. That is, when 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 the through holes 121b4 is preferably 1 to 4 pieces.

The material of the roller 121 is most preferably made of resin, but it is not limited to resin, and can be appropriately selected from materials with relatively low hardness and relatively low friction coefficient compared with the metal round tube 111 or the metal upper guide 150 choose. More specifically, 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 . Either side is low in the material selected.

By selecting such a material, wear of the outer peripheral surface 112a of the circular tube 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 circular tube 111 and the roller 121 support the bed 11 and the user's weight, etc., and the roller 121 rolls coaxially with respect to the circular tube 111 , so 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 the hardness of the roller receiving portion 112, the round tube 111 needs to be replaced when the roller receiving portion 112 is worn out due to long-term use, but such a member replacement is not easy in practice. . On the other hand, by making the hardness of the roller 121 relatively lower than the hardness of the roller receiving part 112 as in the present embodiment, the roller 121 side can be worn instead of the roller receiving part 112 . The roller 121 is a resin-molded product, which is inexpensive to manufacture and easy to replace, so that a structure with high maintainability is realized. In addition, when the roller 121 is made of a resin molded product, there is an advantage that the noise during rolling can be extremely small, and an advantage that it is superior from the viewpoint of weight reduction. In addition, the reason for making the hardness of the roller 121 relatively lower than the hardness of the upper guide 150 is also the same as above.

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

As shown in FIG. 10 , the upper guide 150 has a pair of upper wall 151 and lower wall 152 parallel to each other, and a vertical wall 153 connecting the side edges of the upper wall 151 and the side edges of the lower wall 152 . The upper wall 151 is a substantially rectangular wall portion long in the front-rear direction, and the roller 121 rolls and makes sliding contact with the lower surface 151a. Likewise, the lower wall 152 is a substantially rectangular wall portion long in the front-rear direction, and the roller 121 rolls and makes sliding contact with the upper surface 152a. 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 is opposed to the inner surface 153a. Moreover, the space partitioned by the three surfaces of the lower surface 151a, the upper surface 152a, and the inner surface 153a becomes a passage when the roller 121 rolls and moves.

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 curved surface is formed at the curved portion between the lower surface 151 a of the upper wall 151 and the inner side surface 153 a of the vertical wall 153 . Similarly, a curved surface is also formed at the curved portion between the upper surface 152a of the lower wall 152 and the inner side surface 153a of the vertical wall 153 . Since the chamfer 121b1 is formed in the roller 121 with respect to this curved surface, interference when the roller 121 is rolled can be avoided, and as a result, the roller 121 can be smoothly rolled.

10 , the end edge 121e of the roller 121 fitted on the roller receiving portion 112 side protrudes outward with respect to 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 , the end edge 121 e of the roller 121 is opposed to the upper wall 151 at any position in the longitudinal direction of the upper guide 150 . The end edge 151e of the lower wall 152 and the end edge 152e of the lower wall 152 protrude outward by the remaining dimension m.

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

Alternatively, the residual dimension m may be set to 0 (zero) mm, and the end edge 121e of the roller 121 may be flush with the end edge 151e of the upper wall 151 and the end edge 152e of the lower wall 152 . Also in this case, the same effect can be achieved.

Furthermore, since the separation dimension W in the horizontal direction between the two upper guides 150 is fixed to a certain dimension as described above, the roller 121 can be prevented from falling off from both ends of the circular tube 111 . That is, the roller 121 is prevented from falling off in the direction of the central axis CL by the inner side surface 153a of the vertical wall 153, so that the roller 121 is prevented from falling off.

In the present embodiment, the roller receiving portion 112 of the round tube 111 functions as a rotation axis of the roller 121, and the inner surface 153a of the vertical wall 153 serves as a slip-off preventing member of the roller 121 (conventional structure using bolts and nuts). Moreover, since the load which the roller 121 receives is received by the metal roller receiving part 112, there exists an effect that deformation|transformation of the roller 121 is hard to generate|occur|produce even if it is a resin molded product. Therefore, the same smooth rolling as in the past can be achieved by the roller 121 having a structure with a very 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 therefore the repeated description is omitted here.

The main points of the bed apparatus of the present embodiment having the results described above are summarized below.

which is,

(1) The bed apparatus 10 of the present embodiment includes the bed 11 and the support stand 12 which supports the bed 11 and has the elevating mechanism 27 as a movable mechanism. In addition, the elevating mechanism 2 includes a roller receiving portion 112, a roller 121 to which the roller receiving portion 112 is fitted, and an upper wall 151, a lower wall 152, and a vertical wall 153 as guide members. 152 and the vertical wall 153 have a lower surface 151a and an upper surface 152a serving as a guide portion (or guide surface) contacting the outer peripheral surface 121a1 of the roller 121, and an inner surface 153a serving as a restricting portion that restricts the roller 121 from falling off the roller receiving portion 112 .

In addition, according to the bed apparatus 10, the mounting work can be performed only by the step of fitting the roller 121 to the roller receiving portion 112. In addition, the roller 121 can be mounted without the bolts and nuts required in the conventional structure, and the inner surface 153a prevents the roller 121 from falling off. Therefore, the function as the roller 121 can be ensured, the number of components can be greatly reduced, and the weight can be reduced. In addition, since the nut required in the conventional structure is not required, the welding work for this mounting is also not required, and the processing cost can also be greatly reduced.

Therefore, according to the bed apparatus 10 of the present embodiment, it is possible to reduce both the number of structural members and the number of installation man-hours, and to achieve cost reduction. 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 roll 121 is a cover covering the roll receiving portion 112 and has an opening (through hole 121b4 ) that communicates between the inner space of the roll 121 and the outside air. In addition, the through hole 121b4 also has a function of connecting the air inside the open end of the circular pipe 111 and the outside air.

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 in During installation, the air in the roller 121 is compressed, and the air can also be sent to the outside through the opening. Therefore, the reaction force due to the compression of the air at the time of installation of the roller 121 is not received, so that the installation work can be easily performed.

(3) In the bed apparatus 10 described in the above (2), the openings (through holes 121b4 ) are provided in a plurality (four places) around the central axis CL of the roller 121 .

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

(4) In the bed apparatus 10 according to any one of the above (1) to (3), the roller 121 has an end wall portion 121b facing the restriction portion, and a chamfer is provided on the peripheral edge of the end wall portion 121b 121b1.

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

(5) In the bed apparatus 10 according to any one of the above (1) to (4), the end edge 121e of the roller 121 on the side fitted to the roller receiving portion 112 and the upper wall 151 and the lower wall 152 Each end edge 151e, 152e of the upper wall 151e, 152e protrudes outward on one surface or relative to each end edge 151e, 152e of the upper wall 151 and the lower wall 152.

According to this configuration, for example, even if 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 relationship between the two. direct contact. As a result, damage to the roller receiving portion 112 , the upper wall 151 , and the lower wall 152 can be prevented.

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

According to this structure, the inexpensive roller 121 which is easy to detach or attach can be handled as consumables instead of the metal roller receiving part 112 and the upper guide 150 which are difficult to replace.

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-described configuration.

For example, in the present embodiment, a pair of upper wall 151 and lower wall 152 are used, but according to the application site 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.

Furthermore, in the present embodiment, the roller 121 is provided on the round tube 111 and the upper guide 150 is provided on the leg side member 33b. However, the roller may be provided as shown in FIG. 12 depending on the application site of the present invention. 121 is provided on the foot side member 33b, and the upper guide 150 is provided on the round tube 111. In this case, a new round pipe 111A for installing the roller 121 on the leg side member 33b needs to be welded and fixed to the leg side member 33b.

In addition, in this embodiment, the structure in which the roller 121 rolls in the upper guide 150 is adopted, but a structure in which the roller 121 does not roll in the upper guide 150 may be adopted. For example, as shown in FIG. 13 , when viewed along the central axis CL, a substantially square roller 121A may be employed. In this case, the roller 121A does not roll in the upper guide 150 but only slides, but rolls relatively with respect to the round tube 111 .

In addition, in this embodiment, the example in which the roller 121 is externally fitted to the roller receiving portion 112 has been described, but the present invention is not limited to this configuration. The roller receiving portion 112 is embedded in the roller receiving portion 112 again.

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

In addition, in the present 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 width direction of the outer peripheral surface 121a1 of the roller 121, it can be used as a guide for guiding the rolling or sliding direction of the roller 121 function of the department. Therefore, even if the lower surface 151a is in contact with the main part in the width direction (direction along the center axis CL) of the outer peripheral surface 121a1 of the roller 121 as shown in, for example, FIG. Therefore, the lower surface 151a can also function as a guide reliably. Conversely, it is needless to say that the lower surface 151a may be in contact with each other over 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 the guide member is also the same as the above-described lower surface 151a. That is, as long as the upper surface 152a is in contact with at least a part of the width direction of the outer peripheral surface 121a1 of the roller 121, it can function as a guide for guiding the rolling or sliding direction of the roller 121. 10 , the outer peripheral surface 121a1 may be longer than the lower surface 151a, or the lower surface 151a may be longer than the outer peripheral surface 121a1 in terms of the width in the direction along the central axis CL.

Furthermore, in this embodiment, as shown in FIG. 10 , the inner surface 153a of the vertical wall 153 serving as the guide member is in sliding contact with the entire surface of the outer surface 121b3 of the roller 121, but it is not limited to this configuration. 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 portion that restricts the roller 121 from falling off. For example, in the modified example shown in FIG. 11 , the vertical wall 153 may be in sliding contact with only a part (upper part) of the outer surface 121 b 3 of the roller 121 by shortening the width dimension of the vertical wall 153 in the vertical direction.

In addition, in this embodiment, a 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, the outer peripheral surface 121a1 of the roller 121 may be temporarily separated from the lower surface 151a and the upper surface 152a due to the rolling (or sliding) state of the roller 121, but as long as the outer peripheral surface 121a1 of the roller 121 and the lower surface 151a or A structure in which the upper surface 152a contacts and guides is within the scope of the present invention.

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

In addition to this, the constituent elements of the above-described embodiment may be appropriately replaced with known constituent elements, and the above-described modified examples may be appropriately combined without departing from the gist of the present invention.

Industrial Availability

According to the bed apparatus of the above-described embodiment of the present invention, cost reduction can be achieved by suppressing both the number of structural members and the number of installation man-hours. 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 rollers (slide body)

121a Peripheral wall

121a1 Outer peripheral surface of roller

121b1 Chamfer

121b4 Through hole (opening)

151, 152, 153 Upper wall, lower wall, vertical wall (guide member)

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

153a Inner side (restriction)

CL center axis

Claims (5)

1. A bed unit, characterized in that, the bed unit has: bed; and a support stand, which supports the bed and has a movable mechanism, The movable mechanism has: a receiving portion, which is a hollow tube; a sliding body, the sliding body is fitted in the receiving portion; and a guide member having a guide portion that contacts the outer peripheral surface of the sliding body and a restricting portion that restricts the sliding body from falling off the receiving portion, The sliding body is a cover covering the receiving portion, The sliding body has an opening that communicates between the inner space of the hollow tube and the outside air. 2. The bed apparatus according to claim 1, characterized in that, The sliding body is a roller rotatably around a central axis coaxial with the longitudinal direction of the receiving portion, The opening is provided around the central axis of the sliding body. 3. The bed arrangement according to claim 1 or 2, characterized in that, The sliding body has an end wall portion opposite to the restricting portion, A chamfer is provided on the peripheral edge of the end wall portion. 4. The bed arrangement according to claim 1 or 2, characterized in that: An end edge of the sliding body on one side of the sliding body fitted to the receiving portion and the end edge of the guide portion are on one surface or protrude outward with respect to the end edge of the guide portion. 5. The bed arrangement according to claim 1 or 2, characterized in that, The hardness of the sliding body is lower than either the hardness of the receiving portion or the hardness of the guide member.

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