Bed device

Abstract

To provide a bed device in which assembly work or disassembly work can be performed in a smaller space.SOLUTION: A bed device in one embodiment comprises: a first frame and a second frame which are arranged in a vertical direction and are long in a longitudinal direction; a first link member which has a pair of first arms, and is attached to the first and second frames; a second link member which has a pair of second arms crossing the pair of first arms in a width direction crossing the longitudinal direction, and is attached to the first and second frames; a rotation member which couples the pair of first arms and the pair of second arms in a rotatable state around an axis being parallel to the width direction; and a frame stopper which is fitted to the first and second link members, and regulates relative movement of the pair of second arms to the pair of first arms.SELECTED DRAWING: Figure 13

Description

[Technical Field]

[0001] The present invention relates to a bed apparatus. [Background technology]

[0002] One known example of a bed apparatus includes a lower frame having legs placed on the floor, an upper frame supported by the lower frame, and a lifting mechanism for raising and lowering the upper frame relative to the lower frame. For example, the lifting mechanism includes a link member connecting the lower frame and the upper frame, and a lifting motor for driving the link member (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-13893 Summary of the Invention [Problem to be solved by the invention]

[0004] The bed apparatus as described above is assembled through many steps, such as connecting the link members to the lower frame, connecting the link members to the upper frame, connecting the lifting motor to the lower frame or the upper frame, and connecting the leg members to the lower frame.

[0005] For example, the bed disclosed in Patent Document 1 includes an X-link mechanism as a lifting mechanism. The X-link mechanism includes a pair of first and second links. The first and second links are rotatably connected to each other at approximately the center in the front-to-rear direction via a link fixing part.

[0006] In such an X-link mechanism, the first and second links rotate via the link fixing portion, and therefore may be stored in a flat state during assembly or disassembly. Therefore, it is necessary to secure space for storing the first and second links during assembly or disassembly.

[0007] Therefore, an object of the present invention is to provide a bed apparatus that can be assembled or disassembled in a smaller space. [Means for solving the problem]

[0008] A bed device according to one embodiment comprises a first frame and a second frame that are aligned vertically and elongated in the longitudinal direction, a first link member having a pair of first arms and attached to the first frame and the second frame, a second link member having a pair of second arms that intersect with the pair of first arms when viewed in a width direction that intersects with the longitudinal direction and attached to the first frame and the second frame, a pivot member that connects the pair of first arms and the pair of second arms rotatably around an axis parallel to the width direction, and a frame stopper that is attached to the first link member and the second link member and restricts the relative movement of the pair of second arms with respect to the pair of first arms.

[0009] The bed device may be provided with a drive source having an extendable extension section that rotates the first link member and the second link member using the extension section to change the vertical distance between the first frame and the second frame, a first connecting mechanism, a second connecting mechanism, and a third connecting mechanism.

[0010] The first link member may further include a first connecting member extending in the width direction and connecting the pair of first arms, the second link member may further include a second connecting member extending in the width direction and connecting the pair of second arms, the first connecting mechanism may be provided on the first connecting member and rotatably connect one end of the driving source in the longitudinal direction, the second connecting mechanism may be provided on the first frame and connect the other end of the driving source in the longitudinal direction, and the third connecting mechanism may be provided on the second connecting member and connect the other end of the driving source. The connection destination of the other end of the driving source may be switchable between the second connecting mechanism and the third connecting mechanism.

[0011] The first link member may further have a third connecting member extending in the width direction, aligned parallel to the second connecting member, and connecting the pair of first arms, and the frame stopper may have a first engaging portion engageable with the second connecting member and a second engaging portion engageable with the third connecting member.

[0012] The drive source may have a holding portion that detachably holds the frame stopper. With the frame stopper attached, when the first link member and the second link member are placed on a horizontal surface so that the pair of first arms and the pair of second arms extend along the vertical direction, the first link member and the second link member may be self-supporting.

[0013] A bed apparatus according to one embodiment includes a first frame and a second frame that are aligned in a vertical direction and are elongated in a longitudinal direction, a pair of first arms, and a first connecting member that extends in a width direction intersecting the longitudinal direction and connects the pair of first arms, the first link member being attached to the first frame and the second frame, a pair of second arms that intersect with the pair of first arms as viewed in the width direction, and a second connecting member that extends in the width direction and connects the pair of second arms, the second link member being attached to the first frame and the second frame, and the first connecting member that connects the pair of first arms and the pair of second arms. a rotating member that rotatably connects the arm to the first frame about an axis parallel to the width direction, a drive source having an expandable and contractible section that rotates the first link member and the second link member by the expandable and contractible section to change the distance in the vertical direction between the first frame and the second frame, a first connecting mechanism that is provided on the first connecting member and rotatably connects one end of the drive source in the longitudinal direction, a second connecting mechanism that is provided on the first frame and connects the other end of the drive source in the longitudinal direction, and a third connecting mechanism that is provided on the second connecting member and connects the other end of the drive source. The connection destination of the other end of the drive source can be switched between the second connecting mechanism and the third connecting mechanism.

[0014] The first connecting mechanism may be located between the second connecting mechanism and the third connecting mechanism in the longitudinal direction. [Effects of the Invention]

[0015] According to the present invention, it is possible to provide a bed apparatus that can be assembled or disassembled in a smaller space. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a schematic perspective view of a bed apparatus according to one embodiment. [Figure 2] FIG. 2 is a schematic perspective view of a bed frame and a lifting mechanism according to one embodiment. [Figure 3] FIG. 3 is a schematic plan view of a bed frame and a lifting mechanism according to one embodiment. [Figure 4] FIG. 4 is a schematic perspective view showing a part of the lifting mechanism according to one embodiment. [Figure 5] FIG. 5 is a schematic perspective view of a lifting mechanism according to one embodiment. [Figure 6] FIG. 6 is a schematic perspective view of the attachment mechanism. [Figure 7] FIG. 7 is a schematic perspective view of the attachment mechanism. [Figure 8] FIG. 8 is a diagram illustrating the operation of the attachment mechanism. [Figure 9] FIG. 9 is a schematic perspective view of a driving source according to an embodiment. [Figure 10] FIG. 10 is a schematic perspective view of a coupling mechanism according to one embodiment. [Figure 11] FIG. 11 is a schematic front view of a coupling mechanism according to one embodiment. [Figure 12] FIG. 12 is a schematic perspective view of a lifting mechanism according to one embodiment. [Figure 13] FIG. 13 is a schematic perspective view of a lifting mechanism according to one embodiment. [Figure 14] FIG. 14 is a schematic perspective view of a coupling mechanism according to one embodiment. [Figure 15] FIG. 15 is a schematic perspective view of a frame stopper according to one embodiment. [Figure 16] FIG. 16 is a schematic side view of a frame stopper according to one embodiment. [Figure 17] FIG. 17 is a schematic side view of a frame stopper according to one embodiment. [Figure 18] FIG. 18 is a schematic perspective view showing a part of a drive source according to one embodiment. [Figure 19] FIG. 19 is a schematic perspective view showing the lifting mechanism in a self-standing state. [Figure 20] FIG. 20 is a schematic perspective view of a head frame and an extension frame according to one embodiment. [Figure 21] FIG. 21 is a schematic perspective view showing a state in which the head frame and the extension frame according to one embodiment are freestanding. [Figure 22] FIG. 22 is a schematic perspective view showing an upper frame and thigh base plate according to one embodiment. [Figure 23] FIG. 23 is a schematic perspective view of a coupling mechanism according to one embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] An embodiment will be described with reference to the drawings. In this embodiment, an electric bed capable of raising, lowering, and deforming a bed platform is disclosed as an example of a bed apparatus. However, the configuration disclosed in this embodiment, particularly the structure relating to the connection between various members, can also be applied to other types of bed apparatus, such as a bed apparatus that does not have an electrical control element.

[0018] FIG. 1 is a schematic perspective view of a bed apparatus 1 according to this embodiment. In the following description, a longitudinal direction X, a width direction Y, and a vertical direction Z are defined as shown in the figure. In this embodiment, these directions X, Y, and Z are perpendicular to one another. In this embodiment, the vertical direction Z is defined as up or upward, and the direction opposite to the vertical direction Z is defined as down or downward.

[0019] The bed apparatus 1 comprises a bed frame 2, a bed plate body 10 placed on the bed frame 2, and a plurality of leg members 3 attached to the bed frame 2. Both the bed frame 2 and the bed plate body 10 have an elongated shape in the longitudinal direction X.

[0020] The bed plate body 10 includes a back plate 10A, a lumbar plate 10B, a thigh plate 10C, and a foot plate 10D. The back plate 10A, the lumbar plate 10B, the thigh plate 10C, and the foot plate 10D are arranged in this order in the longitudinal direction X. Adjacent two of these plates 10A, 10B, 10C, and 10D are connected to be rotatable about an axis parallel to the width direction Y. When the bed apparatus 1 is in use, a mattress is placed on the bed plate body 10.

[0021] The bed apparatus 1 further includes a drive mechanism disposed below the bed plate body 10. For example, this drive mechanism includes a lifting mechanism (described later) that raises and lowers the bed plate body 10. Furthermore, the drive mechanism deforms the bed plate body 10 from a flat state as shown in FIG. 1 to a predetermined shape.

[0022] Examples of the predetermined shape include a back-raised state in which the back base plate 10A is raised, and a leg-raised state in which at least one of the thigh base plate 10C and the foot base plate 10D is raised.

[0023] 1, the bed apparatus 1 may include a headboard 11 and a footboard 12. The headboard 11 is disposed at the head-side end of the bed frame 2 in the longitudinal direction X. The footboard 12 is disposed at the foot-side end of the bed frame 2 in the longitudinal direction X.

[0024] Fig. 2 is a schematic perspective view of the bed frame 2 and the lifting mechanism 6 according to this embodiment. Fig. 3 is a schematic plan view of the bed frame 2 and the lifting mechanism 6 according to this embodiment. Fig. 4 is a schematic perspective view showing a part of the lifting mechanism 6 according to this embodiment. Fig. 5 is a schematic perspective view of the lifting mechanism 6 according to this embodiment. In Fig. 4, the drive source 9 is omitted from the lifting mechanism 6.

[0025] As shown in Figures 2 and 3, the bed frame 2 includes a lower frame 4 and an upper frame 5 aligned in the vertical direction Z. In this embodiment, the lower frame 4 corresponds to the first frame, and the upper frame 5 corresponds to the second frame. Both the lower frame 4 and the upper frame 5 have an elongated shape in the longitudinal direction X.

[0026] The lower frame 4 includes frame members 40L, 40R and horizontal beams 41, 42. The frame members 40L, 40R extend in the longitudinal direction X and are aligned in the width direction Y. The horizontal beams 41, 42 are spaced apart in the longitudinal direction X and connect the frame members 40L, 40R.

[0027] 2 and 3, the horizontal beam 41 extends linearly in the width direction Y. On the other hand, the horizontal beam 42 is bent so that its central portion in the width direction Y protrudes in the longitudinal direction X (toward the legs). The leg members 3 are attached to both ends in the longitudinal direction X of the frame material 40L and both ends in the longitudinal direction X of the frame material 40R.

[0028] The upper frame 5 includes frame members 50L, 50R and cross bars 51, 52. The frame members 50L, 50R extend in the longitudinal direction X and are aligned in the width direction Y. The cross bars 51, 52 are spaced apart in the longitudinal direction X and connect the frame members 50L, 50R. In the example shown in FIGS. 2 and 3, the cross bars 51, 52 extend linearly in the width direction Y.

[0029] The upper frame 5 is driven by a lifting mechanism 6 and is movable along the vertical direction Z. That is, the lifting mechanism 6 changes the distance in the vertical direction Z between the lower frame 4 and the upper frame 5.

[0030] 2 and 3, the lifting mechanism 6 includes link members 7 and 8 that connect the lower frame 4 and the upper frame 5, and a rotating member that rotatably connects the link members 7 and 8. In this embodiment, the link member 7 corresponds to the first link member, and the link member 8 corresponds to the second link member. These link members 7 and 8 form a so-called X link.

[0031] The link member 7 has link arms 70L, 70R, cross bars 71, 72, brackets 73L, 73R, shafts 74L, 74R, and shafts 75L, 75R. In this embodiment, the link arms 70L, 70R correspond to a pair of first arms, the cross bar 71 corresponds to a third connecting member, and the cross bar 72 corresponds to a first connecting member.

[0032] The link arms 70L, 70R are arranged in parallel and spaced apart in the width direction Y. The cross bars 71, 72 extend in the width direction Y and connect the link arms 70L, 70R. Specifically, one end of the link arm 70L is connected to the cross bar 71 via a bracket 73L. Furthermore, one end of the link arm 70R is connected to the cross bar 71 via a bracket 73R.

[0033] The shaft 74L is connected to the link arm 70L via a bracket 73L and extends parallel to the width direction Y toward the frame material 40L. The shaft 74R is connected to the link arm 70R via a bracket 73R and extends parallel to the width direction Y toward the frame material 40R.

[0034] The shaft 75L is directly connected to the link arm 70L and extends parallel to the width direction Y toward the frame material 50L. The shaft 75R is directly connected to the link arm 70R and extends parallel to the width direction Y toward the frame material 50R.

[0035] Shaft 74L is attached to frame member 40L by attachment mechanism 76L. Shaft 74R is attached to frame member 40R by attachment mechanism 76R. Shaft 75L is attached to frame member 50L by attachment mechanism 77L. Shaft 75R is attached to frame member 50R by attachment mechanism 77R.

[0036] The link member 8 has link arms 80L, 80R and shafts 81, 82. In this embodiment, the link arms 80L, 80R correspond to a pair of second arms, and the shaft 82 corresponds to a second connecting member.

[0037] The link arms 80L, 80R are arranged in parallel with each other at an interval in the width direction Y. As shown in Figs. 2 and 4, the link arms 80L, 80R intersect with the link arms 70L, 70R when viewed in the width direction Y.

[0038] The shaft 81 extends in the width direction Y and connects the link arms 80L and 80R. One end of the shaft 81 protrudes beyond the link arm 80L toward the frame material 40L. One end of the shaft 81 is attached to the frame material 40L by an attachment mechanism 83L.

[0039] The other end of the shaft 81 protrudes further toward the frame material 40R than the link arm 80R. The other end of the shaft 81 is attached to the frame material 40R by an attachment mechanism 83R.

[0040] The shaft 82 extends in the width direction Y and connects the link arms 80L, 80R. The shaft 82 is aligned parallel to the cross beam 71. One end of the shaft 82 protrudes beyond the link arm 80L toward the frame material 50L. One end of the shaft 82 is attached to the frame material 50L by an attachment mechanism 84L.

[0041] The other end of the shaft 82 protrudes further from the link arm 80R toward the frame material 50R. The other end of the shaft 82 is attached to the frame material 50R by an attachment mechanism 84R.

[0042] That is, the link arms 70L, 70R and the link arms 80L, 80R are attached to the lower frame 4 and the upper frame 5.

[0043] The pivoting members connect the link arms 70L, 70R and the link arms 80L, 80R so that they can pivot about a pivot axis. The pivoting members are, for example, pivot pins 60L, 60R. The link arms 70L, 80L are connected at their middle portions by the pivot pin 60L.

[0044] The link arms 70R and 80R are connected at their middle portions by a pivot pin 60R. The pivot axes of the pivot pins 60L and 60R are both parallel to the width direction Y. The pivot axis of the pivot pin 60L is aligned with the pivot axis of the pivot pin 60R in the width direction Y.

[0045] 4, a roller 78L is provided on the shaft 74L, and a roller 78R is provided on the shaft 74R. A roller 79L is provided on the shaft 75L, and a roller 79R is provided on the shaft 75R.

[0046] A roller 85L is provided at one end of the shaft 81, and a roller 85R is provided at the other end thereof. Furthermore, a roller 86L is provided at one end of the shaft 82, and a roller 86R is provided at the other end thereof.

[0047] 2 and 3, the lifting mechanism 6 further includes a drive source 9. The drive source 9 has a motor 90, a cylinder 91 connected to the motor 90, a rod 92 housed in the cylinder 91, and a control box CB. The cylinder 91 and the rod 92 form a telescopic portion of the lifting mechanism 6 that can be freely extended and retracted.

[0048] The bed apparatus 1 further includes connecting mechanisms C1, C2, and C3. In this embodiment, the connecting mechanism C1 corresponds to the first connecting mechanism, the connecting mechanism C2 corresponds to the second connecting mechanism, and the connecting mechanism C3 corresponds to the third connecting mechanism.

[0049] 3, when viewed in the direction opposite to the vertical direction Z, the connecting mechanism C1 is located between the connecting mechanisms C2 and C3 in the longitudinal direction X. From another perspective, the connecting mechanisms C3, C1, and C2 are lined up in this order along the longitudinal direction X.

[0050] The connecting mechanism C1 is provided on the horizontal beam 72. In the example shown in Fig. 4, the connecting mechanism C1 has a bracket 96 provided on the horizontal beam 72. The bracket 96 has a pair of side walls. The pair of side walls protrude from the horizontal beam 72 in the vertical direction Z and are arranged side by side in the width direction Y with a gap between them.

[0051] The driving source 9 further has a pivot pin 95. The pivot pin 95 is positioned on a bracket 96. The pivot pin 95 is passed through a mounting hole (shown in FIG. 9) provided at the tip of the rod 92. The pivot pin 95 is rotatably supported by the bracket 96. The pivot axis of the pivot pin 95 is parallel to the width direction Y. Configurations that can be applied to the connecting mechanisms C2 and C3 will be described later.

[0052] In the driving source 9, the amount of protrusion of the rod 92 protruding from the cylinder 91 changes as the motor 90 is driven. As the amount of protrusion changes, the link members 7 and 8 rotate around the pivot pins 60L and 60R. In other words, in the driving source 9, the extendable portion formed by the cylinder 91 and the rod 92 rotates the link members 7 and 8.

[0053] As the amount of protrusion of the rod 92 increases, the height of the link members 7 and 8 increases, and the upper frame 5 rises. As the amount of protrusion of the rod 92 decreases, the height of the link members 7 and 8 decreases, and the upper frame 5 descends. Figure 5 corresponds to the state in which the amount of protrusion of the rod 92 is at its smallest. In other words, Figure 5 corresponds to the state in which the shaft 82 is closest to the cross bar 71.

[0054] The control box CB controls the movement of the lifting mechanism 6. The control box CB is attached to the motor 90 and is electrically connected to the motor 90. The control box CB is aligned with the motor 90 in the width direction Y.

[0055] The control box CB may, for example, control the drive mechanism including the lifting mechanism 6 and the entire bed apparatus 1. The control box CB is electrically connected to a power source, a remote control, etc. via cables not shown.

[0056] Fig. 6 is a schematic perspective view of the attachment mechanism 77L. The attachment mechanism 77L includes a roller 79L, also shown in Fig. 4, and a rail 53 that holds the roller 79L. The rail 53 is provided on the side surface of the frame material 50L.

[0057] The rail 53 has a bottom wall 531 and an upper wall 532. The bottom wall 531 and the upper wall 532 are elongated in the longitudinal direction X and face each other with a gap in the vertical direction Z. The roller 79L is disposed between the bottom wall 531 and the upper wall 532 and is movable along the longitudinal direction X.

[0058] 6 corresponds to a state in which the upper frame 5 is raised to the maximum. When the upper frame 5 is lowered, the rollers 79L move toward the cross beams 52.

[0059] The mounting mechanisms 77R, 83L, and 83R have the same configuration as the mounting mechanism 77L shown in Fig. 6. That is, the mounting mechanisms 77R, 83L, and 83R all include rails 53, and the rails 53 support the rollers 79R, 85L, and 85R.

[0060] The rails 53 of the mounting mechanism 77R are provided on the frame material 50R, the rails 53 of the mounting mechanism 83L are provided on the frame material 40L, and the rails 53 of the mounting mechanism 83R are provided on the frame material 40R.

[0061] 7 is a schematic perspective view of the attachment mechanism 76L. The attachment mechanism 76L includes the roller 78L, the wall member 43, the movable member 44, the pivot pin 45, and the elastic body 46, which are also shown in FIG.

[0062] The wall member 43 is provided on the side surface of the frame material 40L and forms a storage space S for the roller 78L. Specifically, the wall member 43 has a bottom wall 431, side walls 432 and 433, and an upper wall 434, and the area surrounded by these corresponds to the storage space S.

[0063] The bottom wall 431 extends parallel to the longitudinal direction X. The side walls 432, 433 extend in the vertical direction Z from both ends of the bottom wall 431 in the longitudinal direction X. The top wall 434 extends parallel to the longitudinal direction X from the side wall 432 and faces the bottom wall 431 in the vertical direction Z.

[0064] In the longitudinal direction X, the top wall 434 is shorter than the bottom wall 431. As a result, an entrance EN that opens in the vertical direction Z is formed between the top wall 434 and the side wall 433. The entrance EN has a width greater than the diameter of the roller 78L.

[0065] Furthermore, the wall member 43 has a slit 435, a connecting portion 436, and a support portion 437. The slit 435 extends between the bottom wall 431 and the side wall 433. The connecting portion 436 protrudes from the side wall 433 toward the side wall 432. The support portion 437 is U-shaped and protrudes from the outer surface of the side wall 433 in the longitudinal direction X.

[0066] The movable member 44 is rotatably connected to the connecting portion 436 by a pivot pin 45. The pivot axis is parallel to the width direction Y. A part of the movable member 44 is located inside the slit 435.

[0067] The movable member 44 is provided at a position overlapping the entrance EN in the vertical direction Z. In the example shown in FIG. 7, the movable member 44 has an upper surface 441, a side surface 442, and a locking portion 443. The upper surface 441 faces approximately in the vertical direction Z and faces the entrance EN. The side surface 442 faces the side wall 432. The locking portion 443 is located below the bottom wall 431.

[0068] The elastic body 46 is, for example, a torsion spring with a pair of arms protruding from a spiral portion. A pivot pin 45 is passed through the spiral portion. One of the arms is supported by a support portion 437. The other arm is fixed to the movable member 44.

[0069] The amount of protrusion of the movable member 44 into the accommodation space S can be adjusted by rotating the movable member 44 around the rotation pin 45. The elastic body 46 biases the movable member 44 so that the amount of protrusion of the movable member 44 into the accommodation space S is maximized.

[0070] When the locking portion 443 reaches its maximum protrusion amount, it comes into contact with the lower surface of the bottom wall 431 and restricts further rotation of the movable member 44. The locking portion 443 protrudes further than the bottom wall 431 in the width direction Y. By pressing the protruding locking portion 443 downward in this manner, the movable member 44 can be rotated.

[0071] 8 is a diagram showing the operation of the attachment mechanism 76L. In this figure, the movable member 44 in a state where it is protruded to the maximum extent into the accommodation space S is shown by a solid line, and the movable member 44 in a state where it is retracted to a certain extent from the accommodation space S is shown by a dotted line.

[0072] There is no gap large enough for the roller 78L to pass between the movable member 44 shown by the solid line and the upper wall 434. In addition, the side surface 442 of the movable member 44 faces most of the roller 78L. Hereinafter, this state of the movable member 44 will be referred to as the closed state.

[0073] Meanwhile, a gap larger than the diameter of the roller 78L is formed between the movable member 44, shown by the chain line, and the upper wall 434. In addition, the side surface 442 of the movable member 44 does not face the roller 78L. Hereinafter, this state of the movable member 44 is referred to as the open state.

[0074] The elastic body 46 biases the movable member 44 toward the closed state. To shift from the closed state to the open state, an operation such as pressing down the locking portion 443 is required.

[0075] In the closed state, movement of the roller 78L in the longitudinal direction X is restricted by the movable member 44. Therefore, when the movable member 44 is in the closed state, the roller 78L located in the storage space S cannot be moved toward the entrance / exit EN.

[0076] On the other hand, in the open state, the roller 78L can be moved toward the entrance EN, and therefore the roller 78L can be moved out through the entrance EN.

[0077] When the roller 78L outside the storage space S is to be moved into the storage space S, the roller 78L can be moved as shown by the arrow R. That is, first, the roller 78L is pressed against the upper surface 441 of the movable member 44 in the closed state, as shown by the dashed line.

[0078] As a result, the movable member 44 rotates downward and transitions to the open state. Thereafter, if the roller 78L is pushed in until it abuts against the side wall 432, the movable member 44 will no longer be in contact with the roller 78L and will be biased by the elastic body 46 to transition to the closed state.

[0079] 8, the upper surface 441 of the movable member 44 in the open state is inclined toward the side wall 432. This allows the roller 78L to move toward the side wall 432 smoothly.

[0080] The mounting mechanisms 76R, 84L, and 84R have the same configuration as the mounting mechanism 76L shown in Figures 7 and 8. That is, the mounting mechanisms 76R, 84L, and 84R each include a wall member 43, a movable member 44, a pivot pin 45, and an elastic body 46, which hold the rollers 78R, 86L, and 86R.

[0081] The wall members 43 etc. of the mounting mechanism 76R are provided on the frame material 40R, the wall members 43 etc. of the mounting mechanism 84L are provided on the frame material 50L, and the wall members 43 etc. of the mounting mechanism 84R are provided on the frame material 50R. In the mounting mechanisms 84L and 84R, the entrance / exit EN faces downward.

[0082] 9 is a schematic perspective view of a driving source 9 according to one embodiment. As described above, the driving source 9 includes a motor 90, a cylinder 91, a rod 92, and a control box CB. The driving source 9 further includes a cap 97 and a pivot pin 99.

[0083] The cap 97 is attached to the tip of the rod 92. The cap 97 has an attachment hole 97a formed therethrough in the width direction Y. The pivot pin 95 shown in FIG. 4 is passed through the attachment hole 97a. The cap 97 and the pivot pin 95 correspond to one end of the drive source 9 in the longitudinal direction. The tip of the rod 92 is pivotably connected to the cross beam 72 of the link member 7 by a connecting mechanism C1 via the cap 97 and the pivot pin 95.

[0084] The motor 90 is provided with a pair of protrusions 98 aligned in the width direction Y. A gap is formed between the pair of protrusions 98. Each of the protrusions 98 has a mounting hole 98a penetrating therethrough in the width direction Y. A pivot pin 99 is passed through the mounting hole 98a. The protrusions 98 and the pivot pin 99 correspond to the other end of the drive source 9 in the longitudinal direction.

[0085] The rotation axis of the rotation pin 99 is parallel to the width direction Y. Both ends of the rotation pin 99 protrude from the respective mounting holes 98a. The motor 90 is rotatably connected to the horizontal beam 42 of the lower frame 4 by a connecting mechanism C2 via the protrusions 98 and the rotation pin 99.

[0086] Fig. 10 is a schematic perspective view of the connecting mechanism C2 according to this embodiment. Fig. 11 is a schematic front view of the connecting mechanism C2 according to this embodiment. The connecting mechanism C2 is provided on the horizontal beam 42. As shown in Figs. 10 and 11, the connecting mechanism C2 includes a bracket 100, a pair of locking pieces 110, and a pair of fixing members 120.

[0087] The bracket 100 is attached to the horizontal beam 42 of the lower frame 4. The bracket 100 has a pair of side walls 101 aligned in the width direction Y, and a bottom wall 102 connecting the lower ends of these side walls 101. Each side wall 101 has a recess 103 (groove) recessed along the vertical direction Z.

[0088] The pair of locking pieces 110 are provided on the outer surfaces of the pair of side walls 101, respectively. That is, the pair of side walls 101 are located between the pair of locking pieces 110 in the width direction Y. Each locking piece 110 is a plate material made of, for example, a metal material or a resin material, and extends longitudinally in the vertical direction Z.

[0089] Each of the locking pieces 110 has a circular opening 112. These openings 112 overlap with the recesses 103 in the width direction Y.

[0090] 10 , a slit 104 and a female screw 105 are formed in the left side wall 101. A claw 111 is formed on the left locking piece 110. The claw 111 is passed through the slit 104 and protrudes inward from the side wall 101.

[0091] The fixing member 120 is, for example, a male screw, which passes through a through hole provided in the locking piece 110 and is screwed into the female screw 105. The female screw 105 and the through hole of the locking piece 110 are located below the opening 112 and recess 103 of the locking piece 110. The right locking piece 110 is also fixed to the right side wall 101 by a similar structure.

[0092] Furthermore, each locking piece 110 has a tapered portion 113. These tapered portions 113 are inclined with respect to the vertical direction Z so that the distance between them in the width direction Y increases as they approach the tip. At least a portion of the tapered portion 113 is located above the recess 103.

[0093] The pair of locking pieces 110 are flexible and can bend around the fixed position by the fixing member 120 as a fulcrum, as shown by the chain line in FIG.

[0094] When attaching the pivot pin 99, the pivot pin 99 is lowered from above toward the recess 103 (shown in FIG. 10) as shown by the arrow in FIG. 11. The length of the pivot pin 99 is greater than the distance between the pair of side walls 101. Therefore, before the pivot pin 99 enters the recess 103, both ends of the pivot pin 99 come into contact with the pair of tapered portions 113.

[0095] When the pivot pin 99 is further lowered from this state, the pair of locking pieces 110 are spread apart in the width direction Y. When the pivot pin 99 reaches the recess 103, the distance between the openings 112 of the pair of locking pieces 110 in the width direction Y becomes larger than the length of the pivot pin 99, and both ends of the pivot pin 99 pass through the openings 112. At this time, the force spreading the locking pieces 110 in the width direction Y is released, and the locking pieces 110 return to the shape shown in FIG.

[0096] As described above, in this embodiment, the pivot pin 99 can be connected to the bracket 100 without any special operation by lowering the pivot pin 99 toward the recess 103. When the pivot pin 99 is connected, the movement of the pivot pin 99 is restricted by the locking piece 110 and the recess 103.

[0097] The pivot pin 99 is rotatable while passing through the opening 112. Since the claw portion 111 of the locking piece 110 is passed through the slit 104 of the side wall 101, the rotation of the locking piece 110 around the fixing member 120 is suppressed.

[0098] When removing the pivot pin 99 from the bracket 100, the user, for example, pushes apart the tapered portions 113 of the pair of locking pieces 110 and lifts the motor 90 upward. This causes the pivot pin 99 to come out of the opening 112.

[0099] Next, the stored state of the lifting mechanism 6 will be described.

[0100] 12 and 13 are schematic perspective views of the lifting mechanism 6 according to this embodiment. Fig. 13 is a perspective view seen from a different direction (opposite direction) from that of Fig. 12. The drive source 9 shown in Fig. 12 has been rotated counterclockwise around the rotation axis of the rotation pin 95 from the state shown in Fig. 5 when viewed in the width direction Y.

[0101] The lifting mechanism 6 includes link members 7 and 8, pivot pins 60L and 60R, and a drive source 9. A connecting mechanism C3 is provided on the shaft 82. In the example shown in FIGS. 12 and 13, the motor 90 is connected to the shaft 82 of the link member 8 by the connecting mechanism C3 via a protrusion 98 and a pivot pin 99.

[0102] 12 and 13, the bed apparatus 1 further includes a frame stopper 200. The frame stopper 200 restricts the relative movement of the link arms 80L, 80R with respect to the link arms 70L, 70R. In other words, the link member 8 does not rotate around the pivot pins 60L, 60R with respect to the link member 7.

[0103] The frame stopper 200 is attached, for example, to the crosspiece 71 of the link member 7 and the shaft 82 of the link member 8. Configurations that can be applied to the frame stopper 200 will be described later.

[0104] As shown in Figures 12 and 13, the state in which the pivot pin 99 is connected to the shaft 82 by the connecting mechanism C3 and the frame stopper 200 is attached to the cross bar 71 and the shaft 82 is sometimes referred to as the "storage state" of the lifting mechanism 6.

[0105] Fig. 14 is a schematic perspective view of a coupling mechanism C3 according to this embodiment. As shown in Fig. 14, the coupling mechanism C3 includes a bracket 310, a motor stopper 320, and a pivot pin 330. As shown in Figs. 12 and 13, in the stored state, portions of the bracket 310 and the motor stopper 320 are positioned between the pair of protrusions 98 in the width direction Y.

[0106] The bracket 310 is provided on the shaft 82 of the link member 8. The bracket 310 is, for example, a plate made of a metal material. In the example shown in FIG. 14 , the bracket 310 is substantially parallel to the XZ plane defined by the longitudinal direction X and the vertical direction Z. The bracket 310 protrudes toward the shaft 81, for example.

[0107] The bracket 310 has a recess 311 at its tip that is recessed along the vertical direction Z. The recess 311 opens upward. In the stored state, the rotation pin 99 is positioned in the recess 311.

[0108] The recess 311 has side surfaces 311a and 311b. The side surface 311a faces the side surface 311b. The side surface 311a is located closer to the tip of the bracket 310 than the side surface 311b. In the example shown in FIG. 14, the side surface 311b is longer than the side surface 311a. In other words, the portion of the bracket 310 that is located closer to the tip than the recess 311 has a shorter length along the vertical direction Z than the portion that is located closer to the shaft 82 than the recess 311.

[0109] The motor stopper 320 is integrally formed from, for example, a resin material. The motor stopper 320 is provided with a slit 340. The slit 340 penetrates the motor stopper 320 in the longitudinal direction X. The bracket 310 is passed through the slit 340.

[0110] The motor stopper 320 has a main body portion 321, a stopper portion 322, an elastic portion 323, and a handle portion 324. The main body portion 321 has a substantially rectangular shape when viewed in the width direction Y.

[0111] The stopper portion 322 is located higher than the main body portion 321. The stopper portion 322 faces the side surface 311b of the recess 311. The stopper portion 322 has, for example, a curved shape that curves toward the side surface 311b. The slit 340 extends between the main body portion 321 and the stopper portion 322. In other words, the main body portion 321 and the stopper portion include portions that overlap with the bracket 310 in the width direction Y.

[0112] The stopper portion 322 has a portion P1 that overlaps with the recessed portion 311 in the vertical direction Z. When the pivot pin 99 is positioned in the recessed portion 311, the portion P1 of the stopper portion 322 restricts the upward movement of the pivot pin 99. A space in which the pivot pin 99 is positioned is formed between the recessed portion 311 and the portion P1 of the stopper portion 322.

[0113] The elastic portion 323 is located below the bracket 310. When the motor stopper 320 rotates relative to the bracket 310, the elastic portion 323 is elastically deformed. The elastic portion 323 has a shape similar to a bent plate.

[0114] 14, the elastic portion 323 has a first portion 323a, a second portion 323b, a third portion 323c, and a fourth portion 323d. The first portion 323a extends along the lower end of the bracket 310.

[0115] The second portion 323b is provided at a distance from the first portion 323a in the vertical direction Z. The second portion 323b overlaps the first portion 323a in the vertical direction Z. The second portion 323b is curved convexly in the vertical direction Z. A part of the second portion 323b contacts the lower end of the bracket 310. For example, a groove in which the bracket 310 is positioned may be formed in the second portion 323b.

[0116] The third portion 323c connects one end of the first portion 323a to the main body portion 321. The third portion 323c is curved convexly in the direction opposite to the vertical direction Z. The fourth portion 323d connects the other end of the first portion 323a to one end of the second portion 323b. When the elastic portion 323 elastically deforms, the distance between the first portion 323a and the second portion 323b in the vertical direction Z becomes smaller.

[0117] Handle portion 324 extends downward from the lower end of main body portion 321. Handle portion 324 has, for example, a curved shape that points toward shaft 82. Motor stopper 320 is rotatably attached to bracket 310 by pivot pin 330. An opening 325 through which pivot pin 330 passes is formed on the shaft 82 side of main body portion 321.

[0118] The pivot pin 330 passes through the opening 325 and a through-hole (not shown) provided in the bracket 310. The pivot axis of the pivot pin 330 is parallel to the width direction Y. For example, when a user pulls the handle portion 324 downward, the motor stopper 320 pivots relative to the bracket 310.

[0119] Since the bracket 310 is positioned in the slit 340, it is possible to rotate the motor stopper 320. The elastic portion 323 biases the side surface 311b of the recess 311 and the stopper portion 322 so that they approach each other.

[0120] When attaching the pivot pin 99, first, the pivot pin 99 is removed from the bracket 100, and the motor 90 is rotated around the rotation axis of the pivot pin 99. Next, as shown by the arrow in Figure 14, the pivot pin 99 is lowered from above toward the recess 311. At this time, the amount of protrusion of the rod 92 from the cylinder 91 is adjusted appropriately.

[0121] Before the pivot pin 99 enters the recess 311, the outer circumferential surface of the pivot pin 99 comes into contact with the upper end of the stopper portion 322. For example, the outer circumferential surface of the pivot pin 99 comes into contact with an inclined surface 322a located at the upper end of the stopper portion 322. The inclined surface 322a is inclined downward in the direction opposite to the longitudinal direction X.

[0122] When the rotation pin 99 is further lowered from this state, the rotation pin 99 presses the inclined surface 322 a , and the elastic portion 323 is elastically deformed, causing the motor stopper 320 to rotate relative to the bracket 310 .

[0123] When the pivot pin 99 is further lowered, the motor stopper 320 pivots relative to the bracket 310, and the pivot pin 99 is positioned between the stopper portion 322 and the recessed portion 311. When the pivot pin 99 reaches the gap between the stopper portion 322 and the recessed portion 311, the elastically deformed elastic portion 323 returns to its original shape, and the motor stopper 320 returns to the position shown in FIG.

[0124] As described above, in this embodiment, the pivot pin 99 can be connected to the shaft 82 without any special operation by lowering the pivot pin 99 toward the recess 311. When the pivot pin 99 is connected, the movement of the pivot pin 99 is restricted by the stopper portion 322 of the motor stopper 320.

[0125] When removing the pivot pin 99 from the connecting mechanism C3, the user can, for example, pull the handle portion 324 of the motor stopper 320 downward to rotate the motor stopper 320 relative to the bracket 310 and form a gap between the stopper portion 322 and the side surface 311b of the recess 311.

[0126] In this state, when the user lifts the motor 90 upward, the pivot pin 99 disengages from the shaft 82. By rotating the motor stopper 320, the size of the gap between the stopper portion 322 and the side surface 311b of the recess 311 can be adjusted.

[0127] 2 and 3, the motor 90 is connected to the cross member 42 of the lower frame 4 by the connecting mechanism C2. That is, the connection destination of the pivot pin 99 of the drive source 9 can be switched between the connecting mechanism C2 and the connecting mechanism C3.

[0128] Next, the frame stopper 200 will be described. Fig. 15 is a schematic perspective view of the frame stopper 200 according to this embodiment. Figs. 16 and 17 are schematic side views of the frame stopper 200 according to this embodiment. Fig. 18 is a schematic perspective view showing a part of the drive source 9 according to this embodiment.

[0129] The frame stopper 200 is integrally formed from, for example, a resin material. The frame stopper 200 has a base portion 210, engagement portions 221 and 222, and an attachment portion 230. The engagement portion 221 corresponds to a first engagement portion, and the engagement portion 222 corresponds to a second engagement portion.

[0130] 15 and 16, the base portion 210 is in the shape of a long, flat plate. The base portion 210 has a substantially rectangular shape. The base portion 210 includes an end portion 211 located on the short side and an end portion 212 opposite the end portion 211. An engagement portion 221 is provided at the end portion 211, and an engagement portion 222 is provided at the end portion 212.

[0131] The engagement portions 221, 222 have a shape that allows them to engage with the shaft 82 and the horizontal cross-piece 71. In this embodiment, the cross-sectional shape of the shaft 82 and the horizontal cross-piece 71 is circular. In the example shown in Figures 15 and 16, the engagement portions 221, 222 are formed in an arc shape. Various shapes can be applied to the engagement portions 221, 222 depending on the shapes of the shaft 82 and the horizontal cross-piece 71, etc.

[0132] The engagement portions 221 and 222 are provided at a predetermined interval. The distance between the engagement portions 221 and 222 is changed as appropriate depending on the distance between the horizontal rail 71 and the shaft 82 in the stored state. In the example shown in Fig. 13, the engagement portion 221 engages with the shaft 82, and the engagement portion 222 engages with the horizontal rail 71.

[0133] The inner peripheral surface of the engaging portion 221 contacts the outer peripheral surface of the shaft 82, and the inner peripheral surface of the engaging portion 222 contacts the outer peripheral surface of the horizontal bar 71. More specifically, the engaging portion 221 contacts more than half of the outer periphery of the shaft 82 in the circumferential direction, and the engaging portion 222 contacts more than half of the outer periphery of the horizontal bar 71 in the circumferential direction.

[0134] The engaging portion 221 has an opening 223 through which the shaft 82 passes, and the engaging portion 222 has an opening 224 through which the cross bar 71 passes. The opening 223 faces the opening 224. The opening 223 is provided between the end portion 211 and one end of the engaging portion 221, and the opening 224 is provided between the end portion 212 and one end of the engaging portion 222.

[0135] For example, the size of the openings 223, 224 is smaller than the outer diameter of the shaft 82 and the horizontal crosspiece 71. The engaging portions 221, 222 are, for example, flexible. When the frame stopper 200 is attached to the shaft 82 and the horizontal crosspiece 71, the engaging portions 221, 222 bend, widening the openings 223, 224 so that the shaft 82 and the horizontal crosspiece 71 can pass through the openings 223, 224.

[0136] A claw portion 225 is provided at one end of the engagement portion 221, and a claw portion 226 is provided at one end of the engagement portion 222. The claw portions 225, 226 extend in the direction opposite to the openings 223, 224. When removing the frame stopper 200 from the shaft 82 and the cross bar 71, the user can remove the engagement portions 221, 222 from the shaft 82 and the cross bar 71 by applying force to the claw portions 225, 226.

[0137] 15 and 16, the attachment portion 230 is a long, flat plate extending along the base portion 210. The attachment portion 230 connects the outer circumferential surfaces of the engagement portions 221 and 222.

[0138] The mounting portion 230 is provided at a distance from the base portion 210. A reinforcing portion 240 may be further provided between the base portion 210 and the mounting portion 230. The reinforcing portion 240 connects the base portion 210 and the mounting portion 230.

[0139] 18, the motor 90 has a holding portion 93 that detachably holds the frame stopper 200. The frame stopper 200 can be attached to the holding portion 93 via an attachment portion 230.

[0140] The holding portion 93 is, for example, a groove extending along the motor 90. The direction along the motor 90 is, for example, the width direction Y. A pair of recesses 94 extending in the extension direction of the holding portion 93 are formed on the side surface of the holding portion 93.

[0141] 15 to 17, the mounting portion 230 has a pair of protrusions 231 that can be inserted into the pair of recesses 94. The pair of protrusions 231 are provided at one end spaced apart from the engaging portions 221, 222. For example, as shown by the arrow in FIG. 18, the frame stopper 200 can be attached to the holding portion 93 by inserting the pair of protrusions 231 into the pair of recesses 94.

[0142] Fig. 19 is a schematic perspective view showing the lifting mechanism 6 in a self-standing state. In the example shown in Fig. 19, the lifting mechanism 6 is in a stored state. That is, the pivot pin 99 is connected to the shaft 82 by the connecting mechanism C3, and a frame stopper 200 is attached to the shaft 82 and the crosspiece 71.

[0143] In the stored state, the lifting mechanism 6 (link members 7, 8) can stand on its own. In the example shown in Fig. 19, the link members 7 and 8 are placed on a horizontal plane SF such as the floor surface so that the link arms 70L, 70R of the link member 7 and the link arms 80L, 80R of the link member 8 extend along the vertical direction Z.

[0144] More specifically, the rollers 79L, 79R of the link member 7 and the rollers 85L, 85R of the link member 8 are in contact with the horizontal plane SF. The frame stopper 200 is located above the driving source 9.

[0145] When the contact points of the rollers 79L, 79R, 85L, and 85R with the horizontal plane SF are connected, an area surrounded by straight lines is formed. When viewed in the vertical direction Z, the center of gravity of the lifting mechanism 6 is located within this area. At this time, the shafts 75L and 75R of the link member 7 and the shaft 81 of the link member 8 may be in contact with the horizontal plane SF.

[0146] Since the relative movement of the link arms 80L, 80R with respect to the link arms 70L, 70R is restricted by the frame stopper 200, the link member 8 does not rotate with respect to the link member 7.

[0147] This allows the link arms 70L, 70R and the link arms 80L, 80R to maintain a state in which they extend along the vertical direction Z. As a result, in the stored state, the lifting mechanism 6 (link members 7, 8) can stand on its own.

[0148] Fig. 20 is a schematic perspective view of the head frame 400 and the extension frame 500 according to this embodiment. Fig. 21 is a schematic perspective view showing the head frame 400 and the extension frame 500 according to this embodiment in a self-standing state.

[0149] The bed frame 2 further includes a head frame 400 and an extension frame 500. The head frame 400 and the extension frame 500 are located closer to the head than the upper frame 5 in the longitudinal direction X. The head frame 400 supports the back bed plate 10A (shown in FIG. 1) of the bed plate body 10.

[0150] The head frame 400 includes frame members 410L, 410R, a horizontal bar 420, and side fence bases 450L, 450R. The frame members 410L, 410R extend in the longitudinal direction X and are aligned in the width direction Y. The horizontal bar 420 connects the frame members 410L, 410R. The horizontal bar 420 extends linearly in the width direction Y.

[0151] The side rail bases 450L, 450R support the side rails arranged on both sides in the width direction Y of the bed apparatus 1. The side rail base 450L is attached to the frame material 410L, and the side rail base 450R is attached to the frame material 410R.

[0152] The side fence base 450L has a frame material 451, a plurality of (for example, two) connecting materials 452, and a cover 453. The frame material 451 extends in the longitudinal direction X and is aligned with the frame material 410L in the width direction Y.

[0153] The two connecting members 452 are arranged at an interval in the longitudinal direction X and connect the frame member 410L and the frame member 451. The cover 453 covers the frame member 451. The frame member 451 and the cover 453 are formed with a plurality of openings 454 for attaching side fences.

[0154] The side fence base 450R has a frame member 455, a plurality of (for example, two) connecting members 456, and a cover 457. The frame member 455 extends in the longitudinal direction X and is aligned with the frame member 410R in the width direction Y.

[0155] The two connecting members 456 are spaced apart in the longitudinal direction X and connect the frame member 410R and the frame member 455. The cover 457 covers the frame member 455. The frame member 455 and the cover 457 are formed with a plurality of openings 458 for attaching side fences.

[0156] The extension frame 500 can adjust the length of the bed frame 2 in the longitudinal direction X according to its position in the longitudinal direction X relative to the head frame 400. The extension frame 500 includes frame members 510L, 510R, a cross beam 520, and holding members 530L, 530R.

[0157] The frame members 510L, 510R extend in the longitudinal direction X and are aligned in the width direction Y. In the example shown in FIGS. 20 and 21, the frame member 510L is provided along the frame member 410L, and the frame member 510R is provided along the frame member 410R. The horizontal beam 520 connects the frame members 510L, 510R. The horizontal beam 520 extends linearly in the width direction Y.

[0158] The holding members 530L and 530R hold the headboard 11 (shown in FIG. 1) to the bed frame 2. The holding member 530L is provided at one end of the frame member 510L, and the holding member 530R is provided at one end of the frame member 510R. The holding members 530L and 530R are aligned in the width direction Y.

[0159] The holding members 530L, 530R are formed, for example, from a plate material. The holding members 530L, 530R are provided so as to be perpendicular to the frame members 510L, 510R. More specifically, the holding members 530L, 530R are substantially parallel to a YZ plane defined by the width direction Y and the vertical direction Z.

[0160] 21, the extension frame 500 is placed on a horizontal plane SF with the holding members 530L, 530R in contact with the horizontal plane SF. At this time, the frame members 410L, 410R of the head frame 400 and the frame members 510L, 510R of the extension frame 500 extend along the vertical direction Z.

[0161] The extension frame 500 can stand on its own while attached to the head frame 400. In the example shown in Fig. 21, the extension frame 500 is attached to the head frame 400, but the extension frame 500 alone can stand on its own.

[0162] The holding members 530L, 530R for holding the headboard 11 to the bed frame 2 have been described, but the structure of the holding members 530L, 530R can also be provided as holding members for holding the footboard 12 (shown in FIG. 1). In this case, the frame having the holding members can also stand on its own.

[0163] Next, we will explain the connecting mechanism C4 for connecting the upper frame 5 and the bed plate body 10. As an example, we will disclose the connecting mechanism C4 for connecting the upper frame 5 and the thigh bed plate 10C. The connecting mechanism C4 can also be used to connect other bed plates 10A, 10B, 10D to the upper frame 5, or to connect bed plates 10A, 10B, 10C, 10D to each other.

[0164] Fig. 22 is a schematic perspective view showing the upper frame 5 and thigh floor plate 10C according to this embodiment. Fig. 23 is a schematic perspective view of the connecting mechanism C4 according to this embodiment.

[0165] The thigh base plate 10C includes frame members 601 and 602 and base plate portions 611 and 612. The frame members 601 and 602 extend in the width direction Y and are aligned in the longitudinal direction X.

[0166] The frame members 601 and 602 are connected by a plurality of connecting members (not shown) that extend in the longitudinal direction X and are aligned in the width direction Y. The floor board portions 611 and 612 are provided between the frame members 601 and 602. The floor board portions 611 and 612 are aligned in the longitudinal direction X.

[0167] The bed apparatus 1 further includes two connecting mechanisms C4. The connecting mechanisms C4 are located between the thigh board 10C and the lumbar board 10B in the longitudinal direction X. As shown in FIG. 22, the two connecting mechanisms C4 are aligned in the width direction Y.

[0168] Thigh base plate 10C is connected to upper frame 5 by two connecting mechanisms C4. Connecting mechanisms C4 have a plane-symmetrical shape with respect to the XZ plane. While Fig. 23 shows connecting mechanism C4 located on the frame member 50R side of upper frame 5, connecting mechanism C4 located on the frame member 50L side is configured similarly.

[0169] 23, the connecting mechanism C4 includes brackets 710 and 720, a fixing member 810, and an elastic body 820. The bracket 710 is provided on the side surface 501 of the frame member 50R of the upper frame 5.

[0170] The bracket 710 is a plate made of, for example, a metal material. In the example shown in Fig. 23, the bracket 710 is substantially parallel to the XZ plane. The bracket 710 protrudes above the upper surface 502 of the frame material 50R. The bracket 710 has a circular opening 711 above the upper surface 502 of the frame material 50R.

[0171] Bracket 720 is provided on frame member 601 of thigh floor board 10C. More specifically, bracket 720 is provided on side surface 603 of frame member 601 that faces lumbar floor board 10B.

[0172] The bracket 720 has a pair of side walls 721, 722 aligned in the width direction Y, and an upper wall 723 connecting the upper ends of these side walls 721, 722. The side wall 721 has a substantially circular opening 724, and the side wall 722 has a circular opening 725. The opening 724 is aligned with the opening 725 in the width direction Y.

[0173] The opening 724 has a basic circular shape. Furthermore, a pair of enlarged portions 726 are formed in the opening 724. The opening 724 can also be said to have an elongated shape in the longitudinal direction X. The pair of enlarged portions 726 are aligned in the longitudinal direction X, but this is not limited to this. As shown in FIG. 23 , the openings 724 and 725 overlap with the opening 711 in the width direction Y.

[0174] The fixing member 810 has a shaft portion 811 and a head portion 812. The shaft portion 811 has a cylindrical shape with a central axis extending in the width direction Y. The head portion 812 is provided at one end of the shaft portion 811. The head portion 812 is located outside the side wall 722.

[0175] The size of head portion 812 is larger than opening 725. Shaft portion 811 is passed through openings 711, 724, and 725. In this way, thigh floor board 10C is mounted on upper frame 5 so as to be rotatable around shaft portion 811 of fixing member 810.

[0176] The elastic body 820 is provided between the pair of side walls 721, 722. In one example, the elastic body 820 is a coil spring having a central axis extending in the width direction Y. The shaft portion 811 is passed through the elastic body 820. The elastic body 820 biases the shaft portion 811 toward the opening 711.

[0177] The connecting mechanism C4 further includes a pair of spring holders 830. The spring holders 830 are located on both sides of the elastic body 820 between the pair of side walls 721, 722. The spring holders 820 are, for example, plain washers. The shaft portion 811 is passed through the pair of spring holders 820.

[0178] Two female threads 813 are provided at the tip end (opposite the head portion 812) of the shaft portion 811. A stopper 840 is provided on the female threads 813. The stopper 840 protrudes beyond the outer circumferential surface of the shaft portion 811 in a direction intersecting the axial direction of the shaft portion 811. The stopper 840 is, for example, a set screw.

[0179] The fixing member 810 is movable in the width direction Y and in the direction opposite to the width direction Y. When the expansion portion 726 and the stopper 840 overlap in the width direction Y, the fixing member 810 is movable in the width direction Y and in the direction opposite to the width direction Y. When the stopper 840 and the side wall 721 overlap in the width direction Y, the movement of the fixing member 810 in the width direction Y and in the direction opposite to the width direction Y is restricted.

[0180] When attaching thigh floorboard 10C, fixing member 810 is moved in the direction opposite to width direction Y. More specifically, fixing member 810 is pulled in the direction opposite to width direction Y. This prevents shaft 811 from coming into contact with bracket 710 when attaching thigh floorboard 10C, allowing thigh floorboard 10C to be placed on upper frame 5. At this time, stopper 840 comes into contact with spring retainer 830, so elastic body 820 is compressed.

[0181] Then, after thigh floor board 10C is placed on upper frame 5, fixing member 810 is moved in width direction Y. More specifically, by releasing the force pulling fixing member 810 in the direction opposite to width direction Y, elastic body 820 returns to its original shape, fixing member 810 moves in width direction Y, and shaft portion 811 passes through opening 711 of bracket 710.

[0182] Furthermore, by rotating the fixing member 810 (for example, by about 90 degrees) after the shaft portion 811 has been passed through the opening 711, the stopper 840 overlaps with the side wall 721 in the width direction Y. This restricts movement of the fixing member 810 in the width direction Y and in the direction opposite to the width direction Y.

[0183] When removing thigh baseplate 10C from upper frame 5, the user, for example, pulls fixing member 810 to remove shaft 811 from opening 711, and lifts thigh baseplate 10C upward.

[0184] In this embodiment, the user can attach and detach thigh floor plate 10C to and from upper frame 5 without using tools or the like.

[0185] The bed apparatus 1 configured as above includes a frame stopper 200 that restricts the relative movement of the link arms 80L, 80R of the link member 8 with respect to the link arms 70L, 70R of the link member 7.

[0186] 12 and 13, the frame stopper 200 prevents the link member 8 from rotating relative to the link member 7. This allows the link arms 70L, 70R and the link arms 80L, 80R to maintain their extended positions in the vertical direction Z when the link members 7 and 8 are placed on the horizontal plane SF. This allows the lifting mechanism 6 to stand on its own in the stored state.

[0187] Because the lifting mechanism 6 is self-standing, the space required to store the link members 7, 8 can be reduced compared to when the link members 7, 8 are stored flat on the horizontal plane SF during assembly or disassembly. As a result, this embodiment allows assembly or disassembly to be performed in a smaller space.

[0188] The frame stopper 200 prevents the link member 8 from rotating relative to the link member 7, making it easy for the user to transport the lifting mechanism 6. Since the link members 7 and 8 do not rotate unexpectedly, the user can transport the lifting mechanism 6 safely.

[0189] The bed apparatus 1 can switch the connection destination of the pivot pin 99 of the drive source 9 between the connecting mechanism C2 and the connecting mechanism C3. More specifically, as shown in Fig. 3, the connecting mechanism C1 is located between the connecting mechanism C2 and the connecting mechanism C3 in the longitudinal direction X. As a result, the drive source 9 can switch the connection destination of the pivot pin 99 of the drive source 9 between the connecting mechanism C2 and the connecting mechanism C3 by rotating around the rotation axis of the pivot pin 95.

[0190] 19, the lifting mechanism 6 can stand on its own when connected to the drive source 9. This eliminates the need to prepare a separate space for storing the drive source 9 with the lifting mechanism 6 of this embodiment.

[0191] In this embodiment, the drive source 9 has a control box CB attached to the motor 90. This allows the bed apparatus 1 to be made more compact than when the control box CB is attached to the bed frame 2 or the like. Furthermore, the lifting mechanism 6 can be packed in a packing material in the stored state. This allows the packaging of the bed apparatus 1 to be reduced.

[0192] In this embodiment, the motor 90 of the drive source 9 has a holder 93. The holder 93 can detachably hold the frame stopper 200. For example, as in the example shown in FIGS. 2 and 3, when the frame stopper 200 is not in use, the user can attach the frame stopper 200 to the motor 90 using the holder 93. As a result, the user is less likely to lose the frame stopper 200.

[0193] Here, among the steps of assembling the bed apparatus 1, the attachment of the lifting mechanism 6 to the bed frame 2 will be described.

[0194] First, the end of the link member 7 is attached to the lower frame 4 via the attachment mechanisms 76L and 76R. At this time, the end of the link member 8 is attached to the lower frame 4 via the attachment mechanisms 83L and 83R. The attachment of the end of the link member 8 to the lower frame 4 may be performed before the end of the link member 7 is attached to the lower frame 4, or may be performed after the end of the link member 7 is attached to the lower frame 4.

[0195] Next, the frame stopper 200 is removed from the link members 7, 8. However, the frame stopper 200 may be removed before the link members 7, 8 are attached to the lower frame 4.

[0196] 14, the pivot pin 99 is removed from the connecting mechanism C3, and the drive source 9 is rotated around the rotation axis of the pivot pin 95. Then, as described with reference to FIGS. 10 and 11, the pivot pin 99 is attached to the lower frame 4 by the connecting mechanism C2. At this time, the amount of protrusion of the rod 92 from the cylinder 91 is adjusted as appropriate.

[0197] Next, the end of the link member 8 is attached to the upper frame 5 via the attachment mechanisms 84L and 84R, and the end of the link member 7 is attached to the upper frame 5 via the attachment mechanisms 77L and 77R. Through the steps described above, the lifting mechanism 6 is attached to the bed frame 2.

[0198] In this embodiment, as described with reference to Figures 2 to 8, the end of the link member 7 can be easily attached to the lower frame 4 by the attachment mechanisms 76L and 76R. In addition, the end of the link member 8 can be easily attached to the upper frame 5 by the attachment mechanisms 84L and 84R. As described with reference to Figures 9 to 11, the driving source 9 can be easily attached to the lower frame 4 by the coupling mechanism C2. As described with reference to Figures 12 to 14, the driving source 9 can be easily attached to the link member 8 by the coupling mechanism C3.

[0199] According to the configuration of this embodiment, no special tools are required for these attachment operations, so that the user can easily assemble and disassemble the bed apparatus 1.

[0200] The extension frame 500 of this embodiment is self-standing, as described with reference to Figures 20 and 21. This allows the space required for assembling or disassembling the bed apparatus 1 to be reduced.

[0201] In this embodiment, the case where the extension frame 500 is self-supporting has been disclosed as an example, but other members constituting the bed apparatus 1 other than the extension frame 500 may also be self-supporting.

[0202] The position at which the frame stopper 200 is attached is not limited to the above example. For example, the frame stopper 200 may be attached to the link arm 70L (70R) and the link arm 80L (80R). The shape of the frame stopper 200 may be changed as appropriate depending on the shape of the member to which it is attached.

[0203] In this embodiment, the motor 90 has the holding portion 93, but the position where the holding portion 93 is provided is not limited to the motor 90. For example, the portion corresponding to the holding portion 93 may be provided on any of the lower frame 4, the upper frame 5, and the link members 7 and 8.

[0204] The present invention is not limited to the configurations disclosed in the present embodiment, and the present invention can be implemented by modifying the configurations disclosed in the present embodiment in various ways. [Explanation of symbols]

[0205] 1...bed device, 2...bed frame, 4...lower frame, 5...upper frame, 6...lifting mechanism, 7, 8...link member, 9...driving source, 60L, 60R...rotating pin, 70L, 70R...link arm, 71, 72...horizontal bar, 80L, 80R...link arm, 81, 82...shaft, 90...motor, 91...cylinder, 92...rod, 93...holding portion, 95...rotating pin, 99...rotating pin, 200...frame stopper, 221...engaging portion, 222...engaging portion, 320...motor stopper, 400...head frame, 500...extension frame, C1, C2, C3, C4...connecting mechanism, SF...horizontal surface.

Claims

1. a first frame and a second frame aligned in a vertical direction and elongated in a longitudinal direction; a first link member having a pair of first arms and attached to the first frame and the second frame; a second link member having a pair of second arms that intersect with the pair of first arms when viewed in a width direction that intersects with the longitudinal direction, the second link member being attached to the first frame and the second frame; a rotating member that connects the pair of first arms and the pair of second arms so as to be rotatable about an axis parallel to the width direction; a frame stopper attached to the first link member and the second link member, which restricts relative movement of the pair of second arms with respect to the pair of first arms; Bed equipment.

2. a drive source having an expandable / contractable section that rotates the first link member and the second link member by the expandable / contractable section, thereby changing the distance between the first frame and the second frame in the vertical direction; a first coupling mechanism; A second connection mechanism; a third linkage mechanism; the first link member further includes a first connecting member extending in the width direction and connecting the pair of first arms; the second link member further includes a second connecting member extending in the width direction and connecting the pair of second arms, the first coupling mechanism is provided on the first coupling member and rotatably couples one end of the drive source in the longitudinal direction; the second connecting mechanism is provided on the first frame and connects the other end of the driving source in the longitudinal direction; the third connecting mechanism is provided on the second connecting member and connects the other end of the drive source; The coupling destination of the other end of the driving source can be switched between the second coupling mechanism and the third coupling mechanism. The bed apparatus according to claim 1 .

3. the first link member further includes a third connecting member extending in the width direction, aligned parallel to the second connecting member, and connecting the pair of first arms; The frame stopper has a first engagement portion engageable with the second connecting member and a second engagement portion engageable with the third connecting member. The bed apparatus according to claim 2.

4. the drive source has a holding portion that detachably holds the frame stopper, The bed apparatus according to claim 2.

5. With the frame stopper attached, when the first link member and the second link member are placed on a horizontal surface so that the pair of first arms and the pair of second arms extend along the vertical direction, the first link member and the second link member can stand on their own. The bed apparatus according to any one of claims 1 to 4.

6. In the longitudinal direction, the first connecting mechanism is located between the second connecting mechanism and the third connecting mechanism. The bed apparatus according to claim 2.

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