JP6691249B2 - Sleeper device - Google Patents

Description

  The present invention relates to a bed device.

Conventionally, as a bed apparatus to which the back knee bottom interlocking mechanism shown in Patent Documents 1 and 2 is applied, the following configuration can be given. That is, in the bed frame in which the back bottom and the knee bottom are rotatably supported, the interlocking link is connected between the drive shaft that rotationally drives the back bottom and the drive shaft that rotationally drives the knee bottom. . Thus, with one drive source, both the back raising of the back bottom and the knee raising of the knee bottom can be performed at the same time.
Specifically, in order to raise the back of the back bottom, when the power from the 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 axis as the drive arm to the interlocking link. Given. Further, the power is applied to the interlocking arm of the knee bottom through the interlocking link and to the push-up arm of the same drive shaft as the interlocking arm of the knee bottom. As a result, the back bottom is raised and at the same time the knee bottom is pushed up.

JP, 2009-240583, A JP, 2004-16635, A

  However, when the height from the ground to the upper surface of the bed is set to, for example, about 150 mm for the purpose of lowering the floor, a space of about 150 mm from the upper surface of the bed even if the height is sufficiently high from the ground. When the mechanism must be housed in the above structure, it is necessary to arrange the interlocking link provided on the main frame and the cross bar forming the elevating mechanism at a position extremely close to each other in the conventional structure because of space limitations. As a result, the interlocking link may come into contact with the cross bar or the floor during operation of the back knee bottom interlocking mechanism. Therefore, it is difficult to sufficiently lower the floor in the conventional bed apparatus having the back knee bottom interlocking mechanism. On the other hand, in the case of a bed device that mechanically interlocks, these members are often indispensable members in order to operate the members. Therefore, it is difficult to dispose the back knee bottom interlocking mechanism inside the bed apparatus, for example, by reducing the number of parts and expanding the space.

  The present invention has been made in view of the above circumstances, and even when the floor is lowered, it is possible to operate the interlocking mechanism such as the 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 apparatus according to an aspect of the present invention includes a bed having a back bottom and a knee bottom, and a support frame that supports the bed, and the support platform rotates when raising the back bottom. A rotation member, a second rotation member that rotates when raising the knee of the knee bottom, a connection between the first rotation member and the second rotation member, and rotation of the first rotation member. An interlocking link capable of interlocking with 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, It has a relief structure that is deformed so as to avoid contact with each other at the intersecting portions.

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

  Both the interlocking link and the cross bar may have a relief structure that is deformed so as to avoid contact with each other at the intersecting portion.

  According to the above aspect, not only one of the cross bar and the interlocking link, but both of them have an escape structure. Therefore, even when the back knee bottom interlocking mechanism is operated in the low-bed bed apparatus, the cross bar can be more reliably operated. It is possible to avoid contact between the link link and.

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

  According to the above aspect, it is possible to sufficiently secure the distance at the intersection between the interlocking link and the cross bar by the curved portion that is easy to manufacture.

  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. The cross bar may be part of the elevating mechanism and rotatably connected to the main frame, and the cross bar may rotate when the elevating mechanism elevates and lowers the main frame.

  According to the above aspect, since both the cross bar and the interlocking link have the escape structure, interference between the cross bar and the interlocking link occurs not only when the back knee bottom interlocking mechanism operates but also when the cross bar rotates. Can be avoided.

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

  According to the above aspect, even when the elevating mechanism is operated, the escape structure is arranged on the rotation axis, so that it is possible to prevent the cross bar from interfering with not only the interlocking link but also other members.

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

It is a top view of the bed apparatus which concerns on one Embodiment of this invention. It is a side view of the bed apparatus shown in FIG. FIG. 2 is an exploded perspective view of a support frame that constitutes the bed apparatus shown in FIG. 1. It is a top view of the support stand shown in FIG. It is a side view of the support stand shown in FIG. FIG. 4 is a side view of the support frame shown in FIG. 3, showing a state where a main frame is raised by a lifting mechanism. It is an expansion perspective view for explaining composition of a bottom interlocking mechanism and a connecting rod in this embodiment.

  A bed apparatus 10 according to an embodiment of the present invention will be described below with reference to the drawings. The bed device 10 can be used, for example, in a medical environment (including a nursing care environment). 1 to 6, an arrow H indicates a head side when a person (user) sleeps, and an arrow F indicates a foot side when a 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 apparatus 10 includes a bed 11, a support base 12, a drive mechanism 13, a board 14, and a control unit 15. The bed device 10 is a so-called electric bed that uses electric power as a power source.
The bed 11 is longer in the front-back direction than in the left-right direction when seen in a plan view. The bed 11 includes a back bottom 16, a waist bottom 17, and a leg bottom 18, and these back bottom 16, waist bottom 17 and leg bottom 18 are directed from the head side H to the foot side F. They are arranged in order. The leg bottom 18 includes a knee bottom 19 and a foot bottom 20, and the knee bottom 19 and the foot bottom 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 surfaces of the leg bottoms 18 (the knee bottoms 19 and the foot bottoms 20) respectively form a part of the bed surface 21. The back bottom 16 corresponds to the portion of the bed surface 21 that supports the user's back, the waist bottom 17 corresponds to the portion of the bed surface 21 that supports the user's waist, and the leg bottom 18 corresponds to the bed surface 21. It corresponds to the part that supports the legs of the upper user. The knee bottom 19 corresponds to a portion of the bed surface 21 that supports the user's knees from the waist, and the foot bottom 20 corresponds to a portion of the bed surface 21 that supports the user's knees to the toes. The waist bottom 17 is formed to be stretchable in the front-back direction. The knee bottom 19 and the foot bottom 20 are rotatably connected about a bending shaft 22 extending in the left-right direction.

  The bed surface 21 is an orthogonal surface orthogonal to the up-down direction in a standard state before the bed 11 is deformed by the drive mechanism 13 such as raising the back or raising the knee (for example, rotation accompanied by ups and downs). The bed surface 21 is formed in a rectangular shape that is longer in the front-back direction than in the left-right direction in plan view. The longitudinal direction of the bed surface 21 (bed 11) is the front-back 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 base 12 supports the bed 11 and receives the loads of the bed 11 and the user on the bed 11. In the present embodiment, the support base 12 supports the back bottom 16 and the leg bottoms 18 (movable bottoms) so as to be rotatable about rotation shafts 23 and 24 extending in the left-right direction, and the bed apparatus 10 is so-called. It is a Gatch bet. The support base 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 a 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 the first vertical members 28 is provided at intervals in the left-right direction.
The first horizontal member 29 is provided on the pair of left and right first vertical members 28, and connects both the first vertical members 28 in the left-right direction. A pair of the first lateral members 29 is provided with a space in the front-rear direction. The first horizontal member 29 is immovably fixed to the first vertical member 28.

  An end of the first vertical member 28 in the front-rear direction projects further outward in the front-rear direction than the first horizontal member 29, and a leg member 30 for installation is attached to each of these ends. In the illustrated example, a rubber cover is used as the leg member 30, but a caster can be used 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 projects from the frame portion 31 in the left-right direction and that is disposed below the bed 11.
The frame portion 31 has a rectangular shape in a 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.

The second vertical member 33 is provided as a pair with a space in the left-right direction.
The second horizontal member 34 is installed on the pair of left and right second vertical members 33, and connects both the second vertical members 33 in the left-right direction. A plurality of second lateral members 34 are provided at intervals in the front-rear direction, five in the illustrated example. The second horizontal member 34 is immovably fixed to the second vertical member 33. An end portion of the second vertical member 33 in the front-rear direction protrudes in the front-rear direction from the second lateral member 34 that is located on the outermost side in 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 sandwiched therebetween, and a pair of left and right option mounting portions 32 are provided at intervals in the front-rear direction. Each option mounting portion 32 includes a pair of front and rear projecting members 35 extending in the left-right direction from the second vertical member 33, and an option receiver 36 slidably mounted on the both projecting members 35 in the left-right direction. There is. The option receiver 36 projects in the left-right direction from the bed 11. An unillustrated fall prevention fence is attached to and detached from the option receiver 36.

  The main frame 26 is divided into two along the front-rear direction into a head side frame 37 and a foot side frame 38. In the present embodiment, each of the pair of second vertical members 33 is divided into a head side member 33a and a foot side member 33b along the front-rear direction. The head-side frame 37 is formed by connecting the pair of left and right head-side members 33a to the two second lateral members 34 located on the head side H of the plurality of second lateral members 34. Further, the pair of left and right foot side members 33b is connected to the three second lateral members 34 located on the foot side F of the plurality of second lateral members 34, so that the foot side frame 38 is formed. A pair of left and right option mounting portions 32 are arranged on each of the head-side frame 37 and the foot-side frame 38.

The head-side frame 37 is provided with a retra frame 39 to which the back bottom 16 is fixed, and a first rotating member 43 for rotating the retra frame 39 (back bottom 16) around the first rotating shaft 23. ing. Both the retort 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 retort frame 39 includes a pair of bottom support parts 40 provided at intervals in the left-right direction, and a connecting shaft 41 connecting end portions of the bottom support part 40 on the foot side F in the front-rear direction. The left and right ends of the connecting shaft 41 project left and right from the bottom support portion 40.

  As shown in FIGS. 3 and 4, the retra frame 39 is connected to the main frame 26 via a retra link 42. A pair of retort links 42 are provided so as to sandwich the retort frame 39 in the left-right direction. An end portion of the connecting shaft 41 in the left-right direction is rotatably connected to an end portion on the foot side F of each retort link 42. The head-side H end of each retort link 42 is rotatably connected to the main frame 26 via the first rotation shaft 23. The first rotation shaft 23 rotatably connects the retort link 42 to the main frame 26.

  As shown in FIGS. 2 to 4, the first rotation member 43 includes a pair of left and right first push-up arm portions 43a extending in the front-rear direction along the lower surface of the back bottom 16 and a pair of left and right first push-up arm portions 43a. And a first connecting portion 43b (receiving member) for connecting in the left-right direction. The first connecting portion 43b connects the end portion of the first push-up arm portion 43a on the foot side F. The left-right end portion of the first connecting portion 43b protrudes leftward and rightward from the first push-up arm portion 43a, and is rotatably connected to the second vertical member 33. The head-side H end portion of the first push-up arm portion 43a slidably contacts the lower surface of the bottom support portion 40.

  In the head-side frame 37, by rotating the first rotating member 43 toward the upper side, the head-side H end of the first push-up arm portion 43a slides on the lower surface of the bottom support portion 40, The first rotating member 43 pushes up the retra frame 39. Then, the retra link 42 rotates about the first rotation shaft 23, and the retra frame 39 rotates about the connecting shaft 41. As a result, as shown in FIG. 2, while the entire back bottom 16 moves to the head side H, the back bottom 16 undulates and rotates about the first rotation shaft 23, and the back bottom 16 inclines with respect to the horizontal plane. It is a so-called back-up state.

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

As shown in FIGS. 3 and 4, a fixing member 45 to which the leg bottom 18 is fixed via the second rotation shaft 24 and the leg bottom 18 around the second rotation shaft 24 are attached to the foot frame 38. The second rotating member 46 for rotating 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 configuring the foot-side frame 38. The fixing member 45 projects from the second lateral member 34 toward the foot side F. An end of the leg bottom 18 on the head side H is rotatably fixed to the fixing member 45 via the second rotation shaft 24.

  The second rotating member 46 is connected to the second vertical member 33 so as to be rotatable 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. These two push-up shafts 47 are arranged coaxially with each other.

The second rotating member 46 is formed in an inverted U shape that opens to the foot side F in a plan view.
The second rotation member 46 connects the 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 18 and the second connecting portion that connects the pair of left and right second push-up arm portions 48 in the left-right direction. 49 (receiving member). The second connecting portion 49 connects the ends on the head side H of the pair of left and right second pushing up arm portions 48. The end portion of the second push-up arm portion 48 on the head side H is connected to the second vertical member 33 via the push-up shaft 47. An end portion of the second push-up arm portion 48 on the foot side F slidably contacts 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 arm portion 48 on the foot side F slides on the lower surface of the knee bottom 19, and 2 The rotation member 46 pushes up the knee bottom 19. Then, as shown in FIG. 2, the knee bottom 19 rotates around the first rotation shaft 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 about the bending axis 22, and the so-called leg-raising state is achieved in which the portion of the bed surface 21 corresponding to the knee bends upward to project.

The foot bottom 20 is provided with a toe raising stay 50. 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 formed by rotating 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-up stay 50 on the foot side F is rotatably connected to the foot bottom 20. The head-side H end of the toe raising stay 50 is a free end.
In the toe raising stay 50, when the leg bottom 18 is brought to the toe raising 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 portion H of the stay 50 for raising the toe is extended and is locked to the second vertical member 33.

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

  In the support base 12, the first rotation member 43 and the second rotation member 46 rotate the back bottom 16 and the leg bottom 18 from the above-described standard state, so that the bed 11 is indicated by a two-dot chain line in FIG. As shown, it is in a typical state of use with the back raised and the legs raised (knee raised). When the bed 11 is changed from the standard state to the use state, the legs are raised before the back is raised, so that the shift of the user with respect to the bed apparatus 10 can be effectively prevented.

As shown in FIGS. 3, 5 and 6, the elevating mechanism 27 elevates and lowers the main frame 26 with respect to the base frame 25. The lifting mechanism 27 has 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).
Each of the first link 51 and the second link 52 is provided as a pair with a space 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 via a connecting pin 54. Has been done.

Four connecting rods 53A to 53D are provided. The connecting rods 53A to 53D connect the front and rear ends of the pair of left and right first links 51 and the front and rear ends of the pair of left and right second links 52, respectively.
Of 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 the head side H of the second link 52. A connecting rod 53B (intersecting rod) that connects the ends of the second vertical member 33 is rotatably connected to the second vertical member 33. Of the four connecting rods 53 </ b> A to 53 </ b> D, the connecting rod 53 </ b> C that connects the end portion of the first link 51 on the foot side F is attached to the upper guide portion 55 provided on the second vertical member 33, and the second link 52. The connecting rod 53D that connects the ends of the foot side F is attached to the lower guide portion 56 provided on the first vertical member 28. The upper guide portion 55 and the lower guide portion 56 slidably support the connecting rods 53C and 53D along the front-rear direction, respectively.
Further, as shown in FIG. 7, in order to avoid contact with an interlocking link 63 described later, the connecting rod 53B rotatably connected to the second vertical member 33 is not composed of only the straight portion 53b, It has a relief structure 53a that is partially curved.

  In the elevating mechanism 27, when the first link 51 rotates upward, the second link 52 also interlocks and rotates upward. At this time, the end portion of the first link 51 on the foot side F and the end portion of the second link 52 on the foot side F are guided to the head side H by the upper guide portion 55 or the lower guide portion 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 base 12 and moves the bed 11 and the movable portion 57 that is at least a part of the support base 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 the leg bottoms 18 (movable bottoms) as the movable portion 57 in conjunction with each other, and the first link 51 or the second link 52 (links as the movable portion 57. ) Is rotated, and a back knee bottom interlocking mechanism (bottom interlocking mechanism) 62 is provided.

  In the present embodiment, the bottom drive mechanism 58 is arranged in a portion of the support base 12 located on the head side H along the front-rear direction. The bottom drive mechanism 58 extends in the front-rear direction to rotate the first rotation member 43 upward. Further, the power of the bottom drive mechanism 58 is given to the second rotating member 46 by the back knee bottom interlocking mechanism 62 to rotate the second rotating member 46 toward the upper side. 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 mounting members 60 that project 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-side frame 37 and projects upward in the standard state. The fixing member 64b is fixed to the second connecting portion 49 of the foot frame 38 and projects downward in the standard state. The interlocking link 63 is rotatably fixed to both the fixing members 64a and 64b. In addition, in the present embodiment, the interlocking link 63 also has a relief structure 63a that is partially curved in order to avoid contact with the connecting rod 53B.

Hereinafter, the interlocking action of the back knee bottom interlocking mechanism 62 according to the present embodiment will be described.
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 mounting member 60. Thereby, the fixing member 64a moves toward the head side H around the first coupling portion 43b together with the head side H end of the interlocking link 63, and the entire interlocking link 63 moves to the head side H. Then, by the movement of the interlocking link 63, the free end of the fixing member 64b moves to the head side H around the second connecting portion 49 (second rotating member 46) together with the end portion of the interlocking link 63 on the foot side F. As a result, the knee bottom 19 (leg bottom 18) is pushed up as shown in FIG. That is, the interlocking link 63 is connected to the first rotating member 43 and the second rotating member 46, so that the rotation of the first rotating member 43 and the rotation of the second rotating member 46 are interlocked. You can
As described above, in the present embodiment, both the raising of the back bottom 16 and the raising of the knee bottom 19 can be simultaneously performed only by the power of the bottom drive mechanism 58. As a result, since the back of the user's body is supported by the knee bottom 19 while raising the back, the displacement of the body due to raising the back is reduced, and the feeling of pressure can be reduced.

  The link drive mechanism 59 is arranged in a portion of the support frame 12 located on the foot side F along the front-rear direction. The link drive mechanism 59 extends in the front-rear direction to rotate the first link 51 upward. The link drive mechanism 59 is provided between the first link 51 and a connecting rod 53C that connects the foot side F end 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 the conversion mechanism 61. The conversion mechanism 61 converts the expansion / contraction motion of the link drive 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 to 6, the board 14 is fixed to the support frame 12 and stands up above the bed surface 21. The boards 14 are provided in a front-rear pair, and stand up from both ends of the second vertical member 33 in the front-rear direction.
The controller 15 controls the drive mechanism 13. The controller 15 is electrically connected to the drive mechanism 13. A 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 instructions from the outside are input via the operation unit. The control unit 15 controls the drive mechanism 13 based on an instruction from the outside.

  By the way, in the present embodiment, a bed apparatus in which the height from the ground (installation surface) to the upper surface of the bed 11 (bed surface 21) is lowered to about 150 mm is assumed. Since the arrangement of the connecting rod and the interlocking link is extremely close to each other, when the bottom drive mechanism 58 is operated, when the main frame is lowered to a lower position, the connecting rod and the interlocking link are seen in a plan view. There is a risk that the intersecting portions (overlapping portions) may come into contact with each other. On the other hand, in the present embodiment, as shown in FIG. 7, at the portion where the interlocking link 63 and the connecting rod 53B intersect in a plan view, the connecting rod 53 and the interlocking link 63 are modified so as to avoid contact with each other. It has the escape structure 53a, 63a which was made.

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 with 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 (upward with respect to the straight line portion 53b in the illustrated example). It is a curved portion (second curved portion). Therefore, even if the back knee bottom interlocking mechanism 62 is operated with a low-bed bed device, a sufficient distance is secured between the escape structure 53a of the connecting rod 53B and the interlocking link 63, so that contact between them can be avoided. it can.
Furthermore, when manufacturing the bed apparatus 10, in consideration of transportability, the frames are often assembled on site to complete the bed apparatus 10. Therefore, in consideration of workability when assembling each frame, as shown in FIG. 3, the connecting rod 53B rotatably connected to the second vertical member 33 is connected to the linear portion 53b and the second vertical member 33. It has a structure arranged on a straight line different from the extension line of the rotating shaft.
On the other hand, the escape structure (curved portion) 53a of the connecting rod 53B is arranged on the extension line of the rotation shaft of the connecting rod 53B with respect to the second vertical member 33. As a result, even when the elevating mechanism 27 is operated, the escape structure (curved portion) 53a is arranged on the rotation axis. Therefore, there is no possibility that the connecting rod 53B interferes with other members. Particularly, in the present embodiment, since the lifting mechanism 27 has the X-link structure, the above configuration is particularly effective when the connecting rod 53B is rotated when the main frame 26 is lifted.

  The escape structure 63a of the interlocking link 63 is provided at a position that intersects with 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). It is a part (1st bending part). Therefore, even when the back knee bottom interlocking mechanism 62 is operated, a sufficient distance can be secured between the escape structure 63a of the interlocking link 63 and the connecting rod 53B, so that their contact can be avoided.

As described above, according to the bed device 10 according to the present embodiment, by having the escape structures 53a and 63a that are deformed in order to prevent both the connecting rod 53 and the interlocking link 63 from contacting each other, With respect to the operations of both the elevating mechanism 27 and the back knee bottom interlocking mechanism 62, it is possible to reliably avoid mutual contact. In particular, in the present embodiment, not only one but both the connecting rod 53 and the interlocking link 63 have the escape structures 53a and 63a. Therefore, even when the floor is lowered, the operation of the back knee bottom interlocking mechanism 62 is prevented. It is possible to prevent them from coming into contact with each other more reliably.
Therefore, in the present embodiment, for example, even when the height from the ground to the upper surface of the bed 11 is set to about 150 mm, for example, the interlocking link 63 provided on the main frame 26 and the connecting rod 53 of the base frame 25 are provided. There is no risk of contact during back-raising and knee-raising operations.

  In the above embodiment, both the connecting rod 53B and the interlocking link 63 have escape structures 53a and 63a. However, the invention is not limited to this, 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 an escape structure, the crossing rod and the interlocking link can be more reliably connected even when the back knee bottom interlocking mechanism is operated in the low bed apparatus. It is preferable because contact can be avoided.

  In addition, in the above-described embodiment, the escape 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 they are deformed so that the distance between them is increased. For example, it may be configured such that they are deformed at right angles so that the distance between them increases. However, a curved portion is preferable from the viewpoint of ease of manufacturing.

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

  Further, in the above embodiment, the lifting mechanism 27 has an X-link structure, but the present invention is not limited to this. The present invention may be applied as appropriate as long as it is a bed device configured to raise and lower the main frame with respect to the base frame.

  Further, in the above embodiment, the escape structure 53a is provided on the connecting rod 53B that is 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. . An escape structure may be appropriately provided for a member that can interfere with the interlocking link depending on the structure of the frame and the like.

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

  In addition, it is possible to appropriately replace the constituent elements in the above-described embodiments with known constituent elements within the scope of the present invention, and it is also possible to appropriately combine the modified examples.

10 Bed Device 11 Bed 12 Supporting Stand 16 Back Bottom 19 Knee Bottom 26 Main Frame 43 First Rotating Member 46 Second Rotating Member 53B Connecting Rod (Receiving Member)
53a escape structure 53b straight part 58 bottom drive mechanism 63 interlocking link 63a escape structure

Claims (18)

Multiple bottoms including back bottom, waist bottom and leg bottom,
A plurality of main frames supporting the plurality of bottoms,
A base frame supporting the plurality of main frames,
A bottom drive mechanism that drives the back bottom and the leg bottom in an interlocking manner,
A mounting member connected to the bottom drive mechanism,
Equipped with
Wherein the main frame, and the dynamic possible first rotating member and the mounting member is connected Kai to, and a second pivot member pivotable provided,
Further comprising an interlocking link connecting the first rotating member and the second rotating member,
The base frame is provided with a first connecting rod extending in the left-right direction that intersects with the interlocking link in a plan view,
The first connecting rod is rotatably connected to a second vertical member,
The first connecting rod includes a linear first portion and a curved portion so as not to come into contact with the interlocking link .
The electric bed, wherein the first portion and the extension line of the rotation axis of the first connecting rod with respect to the second vertical member are arranged on different straight lines. The electric bed according to claim 1, wherein the second vertical member is connected to the main frame. The main frame includes a head side frame and a foot side frame,
The electric bed according to claim 1, wherein the head-side frame is provided with the first rotating member, and the foot-side frame is provided with the second rotating member. The base frame includes two first vertical members extending in the front-rear direction intersecting the left-right direction, and leg members provided on the first vertical member,
The base frame is provided with a second connecting rod extending in the left-right direction, two first links extending in the front-rear direction are provided on the second connecting rod, and two second links extending in the front-rear direction. Is provided on the first connecting rod,
The electric bed according to any one of claims 1 to 3, wherein each of the first link and the second link is connected by a connecting pin.   The electric bed according to any one of claims 1 to 4, wherein the curved portion is arranged on the extension line.   The electric bed according to any one of claims 1 to 5, wherein the height from the installation surface of the electric bed to the upper surfaces of the plurality of bottoms can be 150 mm.   In a plan view, the first rotating member, the first connecting rod, and the second rotating member are arranged in this order from the back bottom side toward the leg bottom side. The electric bed according to any one of claims 1 to 6. The main frame is provided with an option attachment part to which options can be attached and detached,
The electric bed according to any one of claims 1 to 7, wherein the option mounting portion is disposed below the plurality of bottoms. The first connecting rod is connected to the second vertical member via a first member,
9. The lower part of the first member is connected to the first portion, and the upper part of the first member is connected to the second vertical member, according to any one of claims 1 to 8. Electric bed. Multiple bottoms including back bottom and leg bottom,
A plurality of main frames supporting the plurality of bottoms,
A base frame supporting the plurality of main frames,
A bottom drive mechanism that drives the back bottom and the leg bottom in an interlocking manner,
Equipped with
The main frame is provided with a first rotating member that can be rotated by the bottom drive mechanism and a second rotating member that can rotate.
Further comprising an interlocking link for interlocking the rotations of the first rotating member and the second rotating member,
The base frame is provided with a first connecting rod extending in the left-right direction that intersects with the interlocking link in a plan view,
The first connecting rod is rotatably connected to a second vertical member,
The first connecting rod includes a linear first portion and a curved portion so as not to come into contact with the interlocking link.
The electric bed, wherein the first portion and the extension line of the rotation axis of the first connecting rod with respect to the second vertical member are arranged on different straight lines.   The electric bed according to claim 10, wherein the second vertical member is connected to the main frame. The main frame includes a head side frame and a foot side frame,
The electric bed according to claim 10 or 11, wherein the head-side frame is provided with the first rotating member, and the foot-side frame is provided with the second rotating member. The base frame includes two first vertical members extending in the front-rear direction intersecting the left-right direction, and leg members provided on the first vertical member,
The base frame is provided with a second connecting rod extending in the left-right direction, two first links extending in the front-rear direction are provided on the second connecting rod, and two second links extending in the front-rear direction. Is provided on the first connecting rod,
The electric bed according to any one of claims 10 to 12, wherein each of the first link and the second link is connected by a connecting pin.   The electric bed according to any one of claims 10 to 13, wherein the curved portion is arranged on the extension line.   The electric bed according to any one of claims 10 to 14, wherein the height from the installation surface of the electric bed to the upper surfaces of the plurality of bottoms can be 150 mm.   In a plan view, the first rotating member, the first connecting rod, and the second rotating member are arranged in this order from the back bottom side toward the leg bottom side. The electric bed according to any one of claims 10 to 15. The main frame is provided with an option attachment part to which options can be attached and detached,
The electric bed according to any one of claims 10 to 16, wherein the option mounting portion is disposed below the plurality of bottoms. The first connecting rod is connected to the second vertical member via a first member,
The lower side of the first member is connected to the first portion, and the upper side of the first member is connected to the second vertical member. Electric bed.

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