JP7395666B2 - sleeper device - Google Patents

Description

The present invention relates to a bed device.

BACKGROUND ART Conventionally, as a bed device to which the back-knee-bottom interlocking mechanism shown in Patent Documents 1 and 2 is applied, the following configurations are listed. That is, in a bed frame in which the back bottom and the knee bottom are supported so as to be able to rotate up and down, an interlocking link is connected between a drive shaft that rotationally drives the back bottom and a drive shaft that rotationally drives the knee bottom. . As a result, one driving source can simultaneously raise the bottom of the back and raise the bottom of the knees.
Specifically, in order to raise the back of the back bottom, when power from a drive source is applied to the drive arm connected to the back bottom, the power is transferred from the interlocking arm of the same drive shaft as the drive arm to the interlocking link. Given. Further, the power is applied to the interlocking arm of the knee bottom via the interlocking link, and is applied to the push-up arm of the same drive shaft as the interlocking arm of the knee bottom. As a result, the bottom of the back is raised, and the bottom of the knees are also pushed up.

Japanese Patent Application Publication No. 2009-240583 Japanese Patent Application Publication No. 2004-16635

However, if the height from the ground to the top of the bed is set to about 150 mm for the purpose of lowering the floor, for example, or if the height from the ground is sufficiently high, there is a space of about 150 mm from the top of the bed. If the mechanism must be housed in a conventional structure, it is necessary to place the interlocking link provided on the main frame and the crossbar that constitutes the elevating mechanism in extremely close positions due to space constraints. As a result, there is a risk that the interlocking link may come into contact with the crossbar or the floor when the back-knee-bottom interlocking mechanism is operated. Therefore, it has been difficult to sufficiently lower the floor of the conventional bed device having the back-knee-bottom interlocking mechanism. On the other hand, in the case of a mechanically interlocking bed device, these members are often essential members in order to operate the members together. Therefore, it has been difficult to arrange the back-knee-bottom interlocking mechanism inside the bed device, for example by reducing the number of parts and expanding the space.

The present invention has been made in view of the above-mentioned circumstances, and even when the floor is lowered, it is possible to operate an interlocking mechanism such as a back knee bottom interlocking mechanism without bringing the members into contact with each other. The purpose is to provide a bed device.

In order to solve the above problems, the present invention proposes the following means.
A bed device according to one aspect of the present invention includes a bed having a back bottom and a knee bottom, and a support pedestal that supports the bed, and the support pedestal includes a first base that rotates when the back bottom of the back bottom is raised. A rotating member, a second rotating member that rotates when the knee bottom is raised, and the first rotating member and the second rotating member are connected, and the rotation of the first rotating member An interlocking link capable of interlocking the rotation of the second rotating member, and a cross bar having a portion that intersects with the interlocking link in a plan view, and at least one of the interlocking link and the cross bar, The intersecting portions have relief structures deformed to avoid mutual contact.

According to the above aspect, since both the cross bar and the interlocking link have deformed relief structures to avoid contact with each other, contact with each other can be reliably avoided.

Both the interlocking link and the cross bar may have relief structures deformed to avoid contact with each other at the intersecting portions.

According to the above aspect, not only one but both of the cross bar and the interlocking link have a relief structure, so that even when the back knee bottom interlocking mechanism is operated in a low-floor bed device, the cross bar is more reliably secured. It is possible to avoid contact between the link and the interlocking link.

The escape structure of the interlocking link is a first curved portion that curves in a direction away from the cross bar, and the relief structure of the cross bar is a second curved portion that curves in a direction away from the interlock link. It may be a curved part.

According to the above aspect, the curved portion having a shape that is easy to manufacture can ensure a sufficient distance at the intersection between the interlocking link and the cross bar.

The support frame further includes a base frame installed on an installation surface, a main frame to which the bed is fixed, and an elevating mechanism capable of elevating the main frame with respect to the base frame, and the cross bar is , forming a part of the elevating mechanism and being rotatably connected to the main frame, and the cross bar may rotate when the elevating mechanism raises and lowers the main frame.

According to the above aspect, since both the cross bar and the interlocking link have a relief structure, interference between the cross bar and the interlocking link occurs not only when the back knee bottom interlocking mechanism is operated but also when the cross bar rotates. can be avoided.

The cross bar has a straight portion arranged in a straight line different from an extension line of a rotation axis of the cross bar with respect to the main frame, and the escape structure of the cross bar is on an extension line of the rotation axis. may be placed.

According to the above aspect, even when the elevating mechanism is operated, since the escape structure is arranged on the rotation axis, it is possible to avoid interference of the cross bar not only with the interlocking link but also with other members.

According to the bed device according to the above aspect of the present invention, it is possible to lower the floor and include an interlocking mechanism.

FIG. 1 is a plan view of a bed device according to an embodiment of the present invention. FIG. 2 is a side view of the bed device shown in FIG. 1. FIG. FIG. 2 is an exploded perspective view of a support frame that constitutes the bed device shown in FIG. 1. FIG. 4 is a plan view of the support frame shown in FIG. 3. FIG. FIG. 4 is a side view of the support pedestal shown in FIG. 3; FIG. 4 is a side view of the support frame shown in FIG. 3, showing a state in which the main frame is raised by a lifting mechanism. It is an enlarged perspective view for explaining the structure of the bottom interlocking mechanism and the connecting rod in this embodiment.

A bed device 10 according to an embodiment of the present invention will be described below based on the drawings. The bed device 10 can be used, for example, in a medical environment (including a nursing care environment). 1 to 6, arrow H indicates the head side when a person (user) sleeps, and arrow F indicates the foot side when the person sleeps. In the following description, the horizontal direction orthogonal to the front-rear direction, which is the direction of arrows H and F, may be referred to as the left-right direction.

As shown in FIGS. 1 to 6, the bed device 10 includes a bed 11, a support frame 12, a drive mechanism 13, a board 14, and a control section 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 when viewed from above. The bed 11 includes a back bottom 16, a waist bottom 17, and leg bottoms 18. They are lined up in order. The leg bottom 18 includes a knee bottom 19 and a foot bottom 20, and these knee bottoms 19 and foot bottoms 20 are arranged in this order from the head side H to the foot side F.

The upper surface of the back bottom 16, the upper surface of the waist bottom 17, and the upper surface of the leg bottom 18 (knee bottom 19 and foot bottom 20) each form a part of the bed surface 21. The back bottom 16 corresponds to the part on the bed surface 21 that supports the user's back, the waist bottom 17 corresponds to the part on the bed surface 21 that supports the user's waist, and the leg bottoms 18 correspond to the part on the bed surface 21 that supports the user's waist. Corresponds to the part that supports the upper user's legs. The knee bottoms 19 correspond to the portions on the bed surface 21 that support the user's knees and lower back, and the foot bottoms 20 correspond to the portions on the bed surface 21 that support the user's knees and feet. The waist bottom 17 is formed to be expandable and contractible in the front-rear direction. The knee bottom 19 and the foot bottom 20 are rotatably connected around a bending shaft 22 extending in the left-right direction.

The bed surface 21 is an orthogonal surface that is orthogonal to the vertical direction in a standard state before the bed 11 is deformed by the drive mechanism 13 such as raising the back or raising the knees (for example, rotating with ups and downs). The bed surface 21 is formed into a rectangular shape that is longer in the front-rear direction than in the left-right direction when viewed from above. The longitudinal direction of the bed surface 21 (bed 11) is the front-rear direction, and the lateral direction of the bed surface 21 is the left-right direction. A mattress (not shown) is arranged on the bed surface 21.

The support frame 12 supports the bed 11 and receives the respective loads of the bed 11 and the user on the bed 11. In this embodiment, the support pedestal 12 supports the back bottom 16 and the leg bottoms 18 (movable bottoms) so as to be rotatable around pivot shafts 23 and 24 extending in the left-right direction, and the bed device 10 has a so-called It has become a Gatchbet. The support frame 12 includes a base frame 25, a main frame 26, and a lifting 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 includes 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 first vertical members 28 are provided at intervals in the left-right direction.
The first horizontal member 29 is installed over a pair of left and right first vertical members 28, and connects both of these 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 immovably fixed to the first vertical member 28.

The ends of the first vertical member 28 in the front-back direction protrude further outward in the front-rear direction than the first horizontal member 29, and leg members 30 for installation are attached to each of these ends. In the illustrated example, a rubber cover is used as the leg member 30, but it is also possible to use casters instead of the rubber cover.

The main frame 26 directly supports the bed 11. The main frame 26 includes a frame portion 31 that supports the bed 11 from below, and an option attachment portion 32 that protrudes from the frame portion 31 in the left-right direction and is disposed below the bed 11.
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 horizontal 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 installed over a pair of left and right second vertical members 33, and connects both of these second vertical members 33 in the left-right direction. A plurality of second horizontal members 34, five in the illustrated example, are provided at intervals in the front-rear direction. The second horizontal member 34 is immovably fixed to the second vertical member 33. The end portion of the second vertical member 33 in the front-rear direction projects further in the front-rear direction than the second horizontal member 34 located at the outermost side along the front-rear direction among the plurality of second horizontal members 34 .

A pair of left and right option mounting portions 32 are provided with the frame portion 31 in between, and a pair of left and right option mounting portions 32 are provided with an interval in the front-rear direction. Each option mounting portion 32 includes a pair of front and rear protruding members 35 extending in the left-right direction from the second vertical member 33, and an option receiver 36 attached to both of these protruding members 35 so as to be slidable in the left-right direction. There is. The option receiver 36 protrudes from the bed 11 in the left-right direction. A fall prevention fence (not shown) is attached to and detached from the option receiver 36.

The main frame 26 is divided into a head frame 37 and a foot frame 38 along the front-rear direction. In this embodiment, each of the pair of second vertical members 33 is divided into two parts along the front-rear direction into a head side member 33a and a foot side member 33b. The head side frame 37 is formed by connecting the pair of left and right head side members 33a with two second lateral members 34 located on the head side H of the plurality of second lateral members 34. Further, the foot frame 38 is formed by connecting the pair of left and right foot side members 33b with three second lateral members 34 located on the foot side F among the plurality of second lateral members 34. The option attachment parts 32 are arranged in pairs on each of the head side frame 37 and the foot side frame 38, one on the left and one on the left.

The head side frame 37 is provided with a retractable frame 39 to which the back bottom 16 is fixed, and a first rotation member 43 that rotates the retractable frame 39 (back bottom 16) around the first rotation axis 23. ing. Both the retra frame 39 and the first rotating member 43 are formed in an inverted U-shape that opens toward the head side H in plan view.
The retra frame 39 includes a pair of bottom support parts 40 provided at intervals in the left-right direction, and a connecting shaft 41 that connects the ends of the bottom support parts 40 on the foot side F in the front-rear direction. The ends of the connecting shaft 41 in the left-right direction protrude from the bottom support part 40 in the left-right direction.

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

As shown in FIGS. 2 to 4, the first rotating member 43 includes a pair of left and right first pushing upper arm parts 43a extending in the front-rear direction along the lower surface of the back bottom 16, and a pair of left and right first pushing upper arm parts 43a. A first connecting portion 43b (receiving member) that connects the two in the left-right direction. The first connecting portion 43b connects the end of the first pushing upper arm portion 43a on the foot side F. The left-right end portion of the first connecting portion 43b projects in the left-right direction from the first pushing upper arm portion 43a, and is rotatably connected to the second vertical member 33. The head side H end of the first push-up upper arm portion 43a is slidably abutted on the lower surface of the bottom support portion 40.

In the head side frame 37, when the first rotating member 43 rotates upward, the head side H end of the first pushing upper arm portion 43a slides against the lower surface of the bottom support portion 40, The first rotating member 43 pushes up the retra frame 39. Then, the retrieval link 42 rotates around the first rotation shaft 23, and the retrieval frame 39 rotates around the connection shaft 41. As a result, as shown in FIG. 2, while the entire back bottom 16 moves toward the head side H, the back bottom 16 rises and falls around the first rotation axis 23, and the back bottom 16 tilts with respect to the horizontal plane. This results in what is called a back-raised state.

The retracting frame 39 in the back raised state is supported by a retracting stay 44 extending in the front-rear direction. The restoring stay 44 is provided between the retracting frame 39 and the second lateral member 34 located closest to the head side H among the plurality of second lateral members 34. The end of the foot side F of the stay 44 for retracing is rotatably connected to the retra frame 39, and the end of the head side H of the stay 44 for retracing is rotatably connected to the second horizontal member 34. There is. The restoring stay 44 supports the retracting frame 39 in the back raised state from diagonally below the head side H.

As shown in FIGS. 3 and 4, the leg side frame 38 includes a fixing member 45 to which the leg bottom 18 is fixed via the second rotation axis 24, and a fixing member 45 to which the leg bottom 18 is fixed via the second rotation axis 24. A second rotating member 46 that rotates is provided.
The fixing member 45 is provided on the second lateral member 34 located closest to the head side H among the plurality of second lateral members 34 that constitute the foot frame 38 . The fixing member 45 protrudes from the second lateral member 34 toward the foot side F. A head-side end H of the leg bottom 18 is rotatably fixed to the fixing member 45 via the second rotation shaft 24 .

The second rotation member 46 is connected to the second vertical member 33 so as to be rotatable around a push-up shaft 47 . A pair of push-up shafts 47 are provided to sandwich the second rotation member 46 in the left-right direction. Both of these push-up shafts 47 are arranged coaxially with each other.

The second rotating member 46 is formed in an inverted U-shape that opens toward the foot side F in plan view. The second rotating member 46 includes a pair of left and right second push-up upper arms 48 that extend in the front-rear direction along the lower surface of the leg bottom 18, and a second connecting portion that connects the left and right pair of second push-up arm sections 48 in the left-right direction. 49 (receiving member). The second connecting portion 49 connects the ends of the head side H of the pair of left and right second pushing upper arm portions 48 to each other. A head side H end of the second push-up upper arm portion 48 is connected to the second vertical member 33 via a push-up shaft 47. The end of the second push-up upper arm portion 48 on the foot side F slidably abuts on the lower surface of the knee bottom 19.

In the foot side frame 38, the second rotating member 46 rotates upward, so that the end of the second push-up upper arm portion 48 on the foot side F slides on the lower surface of the knee bottom 19. The second rotation member 46 pushes up the knee bottom 19. Then, as shown in FIG. 2, the knee bottom 19 rotates around the first rotation axis 23, and the end of the knee bottom 19 on the foot side F rises. On the other hand, the foot bottom 20 relatively rotates around the bending axis 22, and the portion of the bed surface 21 corresponding to the knee bends upward in a convex manner, resulting in a so-called leg-up state.

Note that the foot bottom 20 is provided with a stay 50 for raising the tip of the foot. The toe-up stay 50 holds the leg bottom 18 in a toe-up state. The leg bottom 18 in the toe-up state is obtained by turning the leg bottom 20 upward around the bending axis 22 after the leg bottom 18 is in the leg-up state. The toe-raising stay 50 extends in the front-rear direction along the lower surface of the foot bottom 20. The end of the foot side F of the toe-raising stay 50 is rotatably connected to the foot bottom 20. The head side H end of the toe lifting stay 50 is a free end.
In the toe-raising stay 50, when the leg bottom 18 is in the toe-up state, the entire toe-raising stay 50 rotates downward and moves diagonally downward from the foot bottom 20 toward the head side H. The head side H end of the toe lifting stay 50 is locked to the second vertical member 33 .

Here, the end of the waist bottom 17 on the head side H is fixed to the retract frame 39, and the end of the waist bottom 17 on the foot side F is fixed to the fixing member 45. When the back bottom 16 rises and turns, the end of the head side H of the waist bottom 17 rises and falls together with the back bottom 16, and the waist bottom 17 as a whole extends in the front-rear direction and projects downward. curved to

In the support frame 12, the first rotating member 43 and the second rotating member 46 rotate the back bottom 16 and the leg bottoms 18 from the above-mentioned standard state, so that the bed 11 moves to the position indicated by the two-dot chain line in FIG. As shown, it is in a typical usage state with the back raised and legs raised (knees raised). When the bed 11 is changed from the standard state to the use state, by raising the legs before raising the back, it is possible to effectively prevent the user from shifting relative to the bed device 10.

As shown in FIGS. 3, 5, and 6, the elevating mechanism 27 raises and lowers the main frame 26 with respect to the base frame 25. The elevating mechanism 27 employs a so-called X-link structure. The elevating mechanism 27 includes a first link 51, a second link 52, and connecting rods 53A to 53D (receiving members).
A pair of first links 51 and a pair of second links 52 are each provided with an interval in the left-right direction. The first link 51 and the second link 52 both extend in the front-rear direction, and the center portions of the first link 51 and the second link 52 in the front-rear direction are rotatably connected to each other via a connecting pin 54. has been done.

Four connecting rods 53A to 53D are provided. Each of the connecting rods 53A to 53D connects both ends of each of the pair of left and right first links 51 in the front-rear direction, and both ends of each of the pair of left and right second links 52 in the front-rear direction.
Among the four connecting rods 53A to 53D, the connecting rod 53A that connects the head side H end of the first link 51 is rotatably connected to the first vertical member 28, and connects the head side H end of the second link 52. A connecting rod 53B (cross rod) connecting the ends of is rotatably connected to the second vertical member 33. Among the four connecting rods 53A to 53D, the connecting rod 53C that connects the end of the foot side F of the first link 51 is attached to the upper guide portion 55 provided on the second vertical member 33, and the connecting rod 53C connects the end of the foot side F of the first link 51. A connecting rod 53D that connects the end portions of the foot side F is attached to a lower guide portion 56 provided on the first vertical member 28. The upper guide part 55 and the lower guide part 56 each support the connecting rods 53C and 53D so as to be slidable in the front-rear direction.
Furthermore, as shown in FIG. 7, in order to avoid contact with an interlocking link 63, which will be described later, the connecting rod 53B rotatably connected to the second vertical member 33 is not composed of only a straight portion 53b. It has a partially curved relief structure 53a.

In the elevating mechanism 27, when the first link 51 rotates upward, the second link 52 also rotates upward in conjunction. At this time, the end of the foot side F of the first link 51 and the end of the foot side F of the second link 52 are guided toward the head side H by the upper guide part 55 or the lower guide part 56, respectively. The link 51 and the second link 52 rotate, and the main frame 26 rises with respect to the base frame 25.

As shown in FIGS. 3 and 4, the drive mechanism 13 is attached to the support pedestal 12 and moves the movable part 57, which is at least part of the bed 11 and the support pedestal 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 drive mechanism 13 includes a bottom drive mechanism 58 that rotates the back bottom 16 and leg bottoms 18 (movable bottoms) as a movable part 57 in conjunction with each other, and a first link 51 or a second link 52 (link ), and a back knee bottom interlocking mechanism (bottom interlocking mechanism) 62.

In this embodiment, the bottom drive mechanism 58 is disposed at a portion of the support frame 12 located on the head side H along the front-rear direction. The bottom drive mechanism 58 rotates the first rotating member 43 upward by extending in the front-back direction. Furthermore, the power of the bottom drive mechanism 58 is applied to the second rotating member 46 by the back knee bottom interlocking mechanism 62, causing the second rotating member 46 to rotate upward. The bottom drive mechanism 58 is provided between the second lateral member 34 located closest to the head side H among the plurality of second lateral members 34 and the first connecting portion 43b. The bottom drive mechanism 58 is connected to the second horizontal member 34 and the first connecting portion 43b via attachment members 60 that protrude from the second horizontal member 34 and the first connecting portion 43b, respectively. The bottom drive mechanism 58 is rotatably connected to the mounting member 60.

The back knee bottom interlocking mechanism 62 connects the first connecting portion 43b (first rotating member 43) of the head side frame 37 and the second connecting portion 49 (second rotating member 46) of the foot side frame 38. There is.
As shown in FIG. 7, the back knee bottom interlocking mechanism 62 includes an interlocking link 63 and fixing members 64a and 64b. The fixing member 64a is fixed to the first connecting portion 43b of the head frame 37, and protrudes upward in the standard state. The fixing member 64b is fixed to the second connecting portion 49 of the foot frame 38, and protrudes downward in the standard state. The interlocking link 63 is rotatably fixed to both of the fixing members 64a and 64b. In this embodiment, the interlocking link 63 also has a partially curved escape structure 63a to avoid contact with the connecting rod 53B.

The interlocking operation of the back-knee-bottom interlocking mechanism 62 according to this embodiment will be described below.
First, when the bottom drive mechanism 58 extends in the front-rear direction from the standard state shown in FIG. 7, the first connecting portion 43b (first rotating member 43) rotates via the attachment member 60. As a result, the fixing member 64a moves toward the head side H around the first connecting portion 43b together with the head side H end of the interlocking link 63, and the entire interlocking link 63 moves toward the head side H. Then, due to the movement of the interlocking link 63, the free end of the fixed member 64b moves toward the head side H around the second connecting portion 49 (second rotating member 46) together with the end of the foot side F of the interlocking link 63. As a result, the knee bottom 19 (leg bottom 18) is pushed up as shown in FIG. That is, by connecting the interlocking link 63 to the first rotating member 43 and the second rotating member 46, the rotation of the first rotating member 43 and the rotation of the second rotating member 46 are linked. I can do it.
In this manner, in this embodiment, it is possible to raise both the back bottom 16 and the knee bottoms 19 at the same time using only the power of the bottom drive mechanism 58. As a result, the user's body is supported by the knee bottoms 19 while the user's back is raised, so the displacement of the user's body due to the back raising is reduced, and the feeling of pressure can be alleviated.

The link drive mechanism 59 is arranged at 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 drive mechanism 59 is provided between the first link 51 and a connecting rod 53C that connects the end of the foot side F of the first link 51 among the plurality of connecting rods 53A to 53D. The link drive mechanism 59 is connected to the connecting rod 53C via a mounting member 60 protruding from the connecting rod 53C. The link drive mechanism 59 is connected to the first link 51 via a conversion mechanism 61. The conversion mechanism 61 converts the telescopic movement of the link drive mechanism 59 into a 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 to 6, the board 14 is fixed to the support frame 12 and stands up above the bed surface 21. A pair of front and rear boards 14 are provided, and stand up from both ends of the second vertical member 33 in the front and rear direction.
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 operation unit (not shown). The control unit 15 is supplied with power from the outside via the power cord C, and receives instructions from the outside via the operation unit. The control unit 15 controls the drive mechanism 13 based on instructions from the outside.

Incidentally, in this embodiment, a bed apparatus is assumed in which the height from the ground (installation surface) to the top surface of the bed 11 (bed surface 21) is reduced to, for example, about 150 mm. Since the connecting rod and the interlocking link are arranged very close to each other, when the bottom drive mechanism 58 is operated and the main frame is lowered to a low position, the connecting rod and the interlocking link will be separated in plan view. There is a risk that the parts where they intersect (overlapping parts) may come into contact. On the other hand, in this embodiment, as shown in FIG. 7, at the portion where the interlocking link 63 and the connecting rod 53B intersect in plan view, the connecting rod 53 and the interlocking link 63 are deformed so as to avoid contacting each other. It has relief structures 53a and 63a.

Specifically, as shown in FIG. 7, the connecting rod 53B includes a straight portion 53b and a relief structure 53a. The escape structure 53a is provided at a position intersecting the interlocking link 63 in a plan view, and a part of the connecting rod 53 is curved in a direction away from the interlocking link 63 (in the illustrated example, upward with respect to the straight portion 53b). This is the curved portion (second curved portion). Therefore, even if the back-knee-bottom interlocking mechanism 62 is operated on a low-floor bed device, a sufficient distance between the relief structure 53a of the connecting rod 53B and the interlocking link 63 is ensured, so contact between them can be avoided. can.
Further, when manufacturing the bed device 10, in consideration of transportability, each frame is often assembled on site to complete the bed device 10. Therefore, in consideration of workability when assembling each frame, the connecting rod 53B, which is rotatably connected to the second vertical member 33 as shown in FIG. It has a structure in which the extension line of the rotation axis is arranged on a different straight line.
On the other hand, the escape structure (curved portion) 53a of the connecting rod 53B is arranged on an extension of the rotation axis of the connecting rod 53B with respect to the second vertical member 33. Thereby, even if the elevating mechanism 27 is operated, the escape structure (curved portion) 53a is placed on the rotation axis. Therefore, there is no possibility that the connecting rod 53B will interfere with other members. In particular, in this embodiment, since the elevating mechanism 27 has an X-link structure, the above configuration is particularly effective when the connecting rod 53B rotates when the main frame 26 is raised and lowered.

Further, the relief structure 63a of the interlocking link 63 is provided at a position intersecting the connecting rod 53B in a plan view, and a part thereof is curved in a direction away from the connecting rod 53B (downward in the illustrated example). (first curved part). Therefore, even when the back-knee-bottom interlocking mechanism 62 is operated, a sufficient distance is ensured between the relief structure 63a of the interlocking link 63 and the connecting rod 53B, so that contact between them can be avoided.

As explained above, according to the bed device 10 according to the present embodiment, by having the escape structures 53a, 63a that are deformed to prevent both the connecting rod 53 and the interlocking link 63 from coming into contact with each other, Both the lifting mechanism 27 and the back-knee-bottom interlocking mechanism 62 can be reliably prevented from coming into contact with each other. In particular, in this embodiment, not only one but both the connecting rod 53 and the interlocking link 63 have relief structures 53a, 63a, so even when the floor is lowered, the operation of the back knee bottom interlocking mechanism 62 is prevented. This will ensure that they do not come into contact with each other.
Therefore, in this embodiment, even if the height from the ground to the top surface of the bed 11 is set to, for example, about 150 mm, the interlocking link 63 provided on the main frame 26 and the connecting rod 53 of the base frame 25 There is no risk of contact during back-raising and knee-raising movements.

Note that in the above embodiment, both the connecting rod 53B and the interlocking link 63 have relief structures 53a and 63a. However, the present invention is not limited thereto, and at least one of the connecting rod 53B and the interlocking link 63 may have a relief structure. However, if both the connecting rod 53B and the interlocking link 63 have a relief structure, even when the back knee bottom interlocking mechanism is operated in a low-floor bed device, the cross rod and the interlocking link will be connected more reliably. This is preferable because contact can be avoided.

In the above embodiment, the relief structures 53a and 63a of the connecting rod 53B and the interlocking link 63 are curved. However, the present invention is not limited to this, as long as the distance between them is changed so that they become farther apart. For example, by deforming at right angles, the distance between them may be increased. However, from the viewpoint of ease of manufacture, a curved portion is preferable.

Further, in the above embodiment, an example has been described in which the back-knee bottom interlocking mechanism 62 is composed of the interlocking link 63 and the fixing members 64a and 64b. However, the present invention is not limited to this, as long as it is possible to raise both the back bottom and the knee bottoms at the same time using only the power of one drive mechanism. The present invention may be applied appropriately to a mechanism having a configuration corresponding to an interlocking link.

Further, in the above embodiment, the elevating mechanism 27 has an X-link structure, but the present invention is not limited to this. The present invention may be applied as appropriate to any bed device configured to move the main frame up and down with respect to the base frame.

Further, in the above embodiment, the escape structure 53a is provided on the connecting rod 53B rotatably connected to the second vertical member 33 that may come into contact with the interlocking link 63, but the present invention is not limited to this. . Depending on the structure of the frame, an escape structure may be provided as appropriate for members that may interfere with the interlocking link.

Further, in the embodiment described above, the bottom drive mechanism 58 is provided on the first rotating member 43, and the back knee bottom interlocking mechanism 62 is configured to transmit the rotational force of the first rotating member 43 to the second rotating member 46. However, the present invention is not limited thereto. The bottom drive mechanism 58 may be provided on the second rotation member 46 so that the back-knee bottom interlocking mechanism 62 transmits the rotational force of the second rotation member 46 to the first rotation member 43.

In addition, without departing from the spirit of the present invention, the components in the embodiments described above may be replaced with well-known components as appropriate, and the above-described modifications may be combined as appropriate.

10 Bed device 11 Bed 12 Support frame 16 Back bottom 19 Knee bottom 26 Main frame 43 First rotating member 46 Second rotating member 53B connecting rod (receiving member)
53a relief structure 53b straight section 58 Bottom drive mechanism 63 Interlocking link 63a relief structure

Claims (3)

A main frame that supports the back bottom and knee bottom;
a base frame that supports the main frame;
Equipped with
An interlocking link provided on the main frame and extending in the front-rear direction is connected between a first rotating member of the main frame that rotationally drives the back bottom and a second rotating member of the main frame that rotationally drives the knee bottom. can be connected to
The base frame includes a first link, a second link, another first link, another second link, and a first connecting rod extending in the left-right direction, and the first link, the second link, and the other The first link and the other second link extend in the front-rear direction, and the first link and the second link extend in the left-right direction from the another first link and the another second link. separated, the first link is connected to the second link by a connecting pin, the another first link is connected to the other second link by another connecting pin, and the first connecting rod is connected to the second link by a connecting pin. connected to a second link and the other second link;
The interlocking link capable of interlocking the rotation of the first rotation member and the rotation of the second rotation member is connected between the first rotation member and the second rotation member of the main frame. In this case, the first connecting rod includes a portion that intersects with the interlocking link when viewed in plan,
The first connecting rod has a relief structure that avoids contact with the interlocking link, and in the relief structure, the height of the intersecting portion is greater than the height of the second link of the first connecting rod and the other third link. An electric bed with a different height of the part connected to the 2-link . The electric bed according to claim 1, wherein the relief structure includes a curved portion of the first connecting rod and a straight portion of the first connecting rod. The electric bed according to claim 1 or 2, wherein the height from the installation surface of the electric bed to the upper surface of the back bottom and the knee bottom can be 150 mm.

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