Bed device

Abstract

To provide a bed device for which assembling work and disassembling work are easy.SOLUTION: A bed device comprises a bed frame, a link member connected to the bed frame, a drive source that rotates the link member around an axis parallel to the width direction, a first connection mechanism that connects the drive source to the bed frame in a rotatable manner, and a second connection mechanism that connects the drive source to the link member in a rotatable manner. The first connection mechanism includes: a bracket that is installed on the bed frame, and has a pair of sidewalls that respectively has a recessed portion recessed in a direction intersecting the width direction and is aligned in the width direction; a pair of locking pieces that is provided on the outer surfaces of the pair of sidewalls, and has an opening overlapping with the recessed portion in the width direction; a pin that is installed on the drive source, and passes through the recessed portions of the pair of sidewalls and the openings of the pair of locking pieces; and a fixing member that fixes the pair of locking pieces to the pair of sidewalls such that the spacing in the width direction of the openings can be expanded beyond the length of the pin.SELECTED DRAWING: Figure 10

Description

[Technical Field]

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

[0002] One example of a bed device is known that includes a lower frame with legs that are placed on the floor, an upper frame that is supported by the lower frame, and a lifting mechanism that raises and lowers the upper frame relative to the lower frame.

[0003] For example, the lifting mechanism includes a link member that connects the lower frame and the upper frame, and a lifting motor that drives the link member (see, for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 3639725 [Patent Document 2] Japanese Patent Publication No. 2022-13893 Summary of the Invention [Problem to be solved by the invention]

[0005] The bed apparatus 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 lift motor to the lower frame or the upper frame, and connecting the leg members to the lower frame. Furthermore, when dismantling the bed apparatus, the connection between each element must also be released. Therefore, the assembling and dismantling of the bed apparatus requires a lot of labor and time.

[0006] An object of the present invention is to provide a bed apparatus that can be easily assembled or disassembled. [Means for solving the problem]

[0007] A bed apparatus according to one embodiment includes a first frame and a second frame aligned vertically and elongated longitudinally, a link member connected to the first frame and the second frame, a first attachment mechanism for attaching the link member to the first frame, and a second attachment mechanism for attaching the link member to the second frame. The first attachment mechanism includes a first roller attached to the link member, a wall member attached to the first frame, forming a storage space for the first roller and having an opening opening in the vertical direction, a movable member positioned to overlap the opening in the vertical direction and movable between a closed state in which the movable member protrudes into the storage space and an open state in which the movable member retracts from the storage space, and an elastic body for biasing the movable member toward the closed state. When the first roller is stored in the storage space and the movable member is in the closed state, the first roller faces the movable member in the longitudinal direction, restricting movement of the first roller toward the opening. When the movable member is in the open state, the first roller can be taken in and out of the accommodation space through the entrance.

[0008] The second attachment mechanism may include a second roller provided on the link member, and a rail provided on the second frame for holding the second roller movably in the longitudinal direction.

[0009] The bed device may further include a drive source that rotates the link member around an axis parallel to the width direction of the first frame and the second frame, thereby changing the vertical distance between the first frame and the second frame.

[0010] According to another aspect of one embodiment, a bed apparatus includes a bed frame, a link member connected to the bed frame, a drive source that rotates the link member around an axis parallel to the width direction of the bed frame, a first coupling mechanism that rotatably couples the drive source to the bed frame, and a second coupling mechanism that rotatably couples the drive source to the link member. The first coupling mechanism includes a bracket provided on the bed frame and including a pair of side walls that are aligned in the width direction and each have a recess that is recessed in a direction intersecting the width direction, a pair of locking pieces provided on outer surfaces of the pair of side walls and each have an opening that overlaps with the recess in the width direction, pins provided on the drive source and that are passed through the recesses in the pair of side walls and the openings of the pair of locking pieces, and fixing members that fix the pair of locking pieces to the pair of side walls so that the distance between the openings in the width direction can be expanded to a value greater than the length of the pin.

[0011] The pair of locking pieces may each have a tapered portion that is inclined with respect to the vertical direction so that the distance between them in the width direction increases toward the tip.

[0012] According to yet another aspect of one embodiment, a bed apparatus includes a leg member, a bed frame having a mounting portion to which the leg member is attached, and a fixing pin for fixing the leg member to the bed frame. The fixing pin has a handle portion, a shaft portion extending from the handle portion, and an engaging portion provided at the tip of the shaft portion. The mounting portion has a first mounting hole into which the shaft portion can be inserted. The leg member has a housing portion capable of housing the mounting portion, and a second mounting hole that communicates with the housing portion and overlaps with the first mounting hole when the mounting portion is housed in the housing portion. By inserting the shaft portion into the first mounting hole and the second mounting hole and rotating the handle portion to a fixed position, the engaging portion engages with the mounting portion. By rotating the handle portion from the fixed position to a release position, the engagement between the engaging portion and the mounting portion is released.

[0013] For example, the engaging portion is a protrusion extending from the tip of the shaft portion in a protruding direction intersecting the extending direction of the shaft portion. The first mounting hole may penetrate between the inner and outer surfaces of a wall portion of the mount portion and have a shape that is elongated in a first direction. In this case, the shaft portion and the engaging portion can be inserted into and removed from the first mounting hole and the second mounting hole by aligning the protruding direction with the first direction. Furthermore, by inserting the shaft portion into the first mounting hole and the second mounting hole and rotating the fixing pin so that the protruding direction coincides with a second direction intersecting the first direction, the engaging portion engages with the inner surface of the mount portion. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide a bed apparatus that can be easily assembled or disassembled. [Brief explanation of the drawings]

[0015] [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 an attachment mechanism (second attachment mechanism) according to one embodiment. [Figure 6] FIG. 6 is a schematic perspective view of an attachment mechanism (first attachment mechanism) according to one embodiment. [Figure 7] FIG. 7 illustrates the operation of an attachment mechanism according to one embodiment. [Figure 8] FIG. 8 is a schematic perspective view showing a part of a driving source according to one embodiment. [Figure 9] FIG. 9 is a schematic perspective view showing a portion of a coupling mechanism according to one embodiment. [Figure 10] FIG. 10 is a schematic front view showing a portion of a coupling mechanism according to one embodiment. [Figure 11] FIG. 11 is a schematic perspective view of a leg member attached to a frame member of a lower frame according to one embodiment. [Figure 12] FIG. 12 is a schematic cross-sectional perspective view of a leg member according to one embodiment. [Figure 13] FIG. 13 is a schematic perspective view of an attachment portion and a fixing pin according to one embodiment. [Figure 14] FIG. 14 is a schematic side view of a mounted portion according to one embodiment. [Figure 15] FIG. 15 is a schematic perspective view of a fixation pin and a blocking pin according to one embodiment. [Figure 16] FIG. 16 is a schematic cross-sectional view of a leg member, a mounting portion, a fixing pin, and a blocking pin according to one embodiment. [Figure 17] FIG. 17 is a schematic perspective view of a lower frame to which casters are attached according to one embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] 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.

[0017] 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.

[0018] 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.

[0019] The bed plate body 10 includes a back plate 10A, a lumbar plate 10B, a thigh plate 10C, and a foot plate 10D. These plates 10A, 10B, 10C, and 10D are aligned in order in the longitudinal direction X. Adjacent two of the plates 10A, 10B, 10C, and 10D are connected to each other so as 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 plates 10A, 10B, 10C, and 10D.

[0020] 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 6, described below, that raises and lowers the bed plate body 10. Furthermore, the drive mechanism transforms the bed plate body 10 from a flat state as shown in Fig. 1 into a predetermined shape. Examples of the predetermined shape include a back-raised state in which the back plate 10A is raised, and a leg-raised state in which at least one of the thigh plate 10C and the foot plate 10D is raised.

[0021] The bed apparatus 1 may include a headboard 11 and a footboard 12 shown in Fig. 1. The headboard 11 is disposed at the head end of the bed frame 2. The footboard 12 is disposed at the foot end of the bed frame 2.

[0022] Fig. 2 is a schematic perspective view of the bed frame 2 and the lifting mechanism 6. Fig. 3 is a schematic plan view of the bed frame 2 and the lifting mechanism 6. Fig. 4 is a schematic perspective view showing a part of the lifting mechanism 6.

[0023] 2 and 3, the bed frame 2 includes a lower frame 4 and an upper frame 5 arranged in the vertical direction Z. The lower frame 4 and the upper frame 5 each have an elongated shape in the longitudinal direction X.

[0024] The lower frame 4 includes frame members 40L, 40R and cross bars 41, 42. The frame members 40L, 40R extend in the longitudinal direction X and are aligned in the width direction Y. The cross bars 41, 42 are spaced apart in the longitudinal direction X and connect the frame members 40L, 40R. In the example shown in FIGS. 2 and 3, the cross bar 41 extends linearly in the width direction Y. Meanwhile, the cross bar 42 is bent so that its central portion in the width direction Y protrudes in the longitudinal direction X (towards the feet).

[0025] 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.

[0026] 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 Figures 2 and 3, the cross bars 51, 52 both extend linearly in the width direction Y.

[0027] 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.

[0028] 2 to 4, the lifting mechanism 6 includes link members 7 and 8 that connect the lower frame 4 and the upper frame 5. These link members 7 and 8 form a so-called X link.

[0029] The link member 7 includes link arms 70L, 70R, cross bars 71, 72, brackets 73RL, 73R, shafts 74L, 74R, and shafts 75L, 75R. The link arms 70L, 70R are arranged in parallel with each other in the width direction Y with a gap therebetween.

[0030] The cross beams 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 beam 71 via a bracket 73L. Also, one end of the link arm 70R is connected to the cross beam 71 via a bracket 73R.

[0031] 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. 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.

[0032] 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.

[0033] The link member 8 includes link arms 80L, 80R and shafts 81, 82. The link arms 80L, 80R are arranged in parallel in the width direction Y with a gap therebetween.

[0034] The shaft 81 extends in the width direction Y and connects the link arms 80L and 80R. One end of the shaft 81 protrudes further toward the frame material 40L than the link arm 80L and is attached to the frame material 40L by an attachment mechanism 83L. The other end of the shaft 81 protrudes further toward the frame material 40R than the link arm 80R and is attached to the frame material 40R by an attachment mechanism 83R.

[0035] The shaft 82 extends in the width direction Y and connects the link arms 80L and 80R. One end of the shaft 82 protrudes further toward the frame material 50L than the link arm 80L and is attached to the frame material 50L by an attachment mechanism 84L. The other end of the shaft 82 protrudes further toward the frame material 50R than the link arm 80R and is attached to the frame material 50R by an attachment mechanism 84R.

[0036] The link arms 70L, 80L are rotatably connected at their middle portions by a pivot pin 60L. The link arms 70R, 80R are rotatably connected at their middle portions by a pivot pin 60R. The pivot axes of the pivot pins 60L, 60R are both parallel to the width direction Y.

[0037] 4, rollers 78L and 78R are provided on the shafts 74L and 74R, respectively. Rollers 79L and 79R are provided on the shafts 75L and 75R, respectively.

[0038] 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.

[0039] 2 and 3, the lifting mechanism 6 further includes a drive source 9. The drive source 9 includes a motor 90, a cylinder 91 connected to the motor 90, and a rod 92 housed in the cylinder 91.

[0040] The motor 90 is rotatably connected to the cross beam 42 of the lower frame 4 by a connecting mechanism 93. The tip of the rod 92 is rotatably connected to the cross beam 72 of the link member 7 by a connecting mechanism 94. The rotation axes of the connecting mechanisms 93 and 94 are both parallel to the width direction Y.

[0041] 4, the connecting mechanism 94 includes a bracket 96 provided on the cross beam 72 and a pivot pin 95 rotatably supported by the bracket 96. The pivot pin 95 is passed through a mounting hole provided at the tip of the rod 92. Configurations that can be applied to the connecting mechanism 93 will be described later.

[0042] As the motor 90 is driven, the amount by which the rod 92 protrudes from the cylinder 91 changes. As this change in the amount of protrusion occurs, the link members 7 and 8 rotate around the pivot pins 60L and 60R. When the amount by which the rod 92 protrudes increases, the height of the link members 7 and 8 increases, and the upper frame 5 rises. When the amount by which the rod 92 protrudes decreases, the height of the link members 7 and 8 decreases, and the upper frame 5 descends.

[0043] Fig. 5 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.

[0044] 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.

[0045] 5 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.

[0046] The mounting mechanisms 77R, 83L, and 83R have the same configuration as the mounting mechanism 77L shown in Fig. 5. That is, the mounting mechanisms 77R, 83L, and 83R all include rails 53, and rollers 79R, 85L, and 85R are held by these rails 53. 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.

[0047] 6 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] Furthermore, the wall member 43 has a slit 435, a connecting portion 436, and a support portion 437. The slit 435 extends to both 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.

[0052] The movable member 44 is rotatably connected to the connecting portion 436 by a pivot pin 45. The axis of this rotation is parallel to the width direction Y. A part of the movable member 44 is located inside the slit 435.

[0053] The movable member 44 is provided at a position overlapping the entrance EN in the vertical direction Z. In the example of FIG. 6, 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 7 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] When the roller 78L outside the storage space S is moved into the storage space S, the roller 78L can be moved as shown by the arrow R. That is, the roller 78L is first pressed against the upper surface 441 of the movable member 44 in the closed state, as shown by the broken line in FIG. 2. This causes the movable member 44 to rotate downward and transition to the open state. Thereafter, when the roller 78L is pressed to a position where it abuts against the side wall 432, the movable member 44 is no longer in contact with the roller 78L, and is biased by the elastic body 46 to transition to the closed state.

[0064] 7, 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.

[0065] The mounting mechanisms 76R, 84L, and 84R have the same configuration as the mounting mechanism 76L shown in Figures 6 and 7. 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. The wall member 43 and the like of the mounting mechanism 76R are provided on the frame member 40R, the wall member 43 and the like of the mounting mechanism 84L are provided on the frame member 50L, and the wall member 43 and the like of the mounting mechanism 84R are provided on the frame member 50R. In the mounting mechanisms 84L and 84R, the entrance / exit EN faces downward.

[0066] 8 is a schematic perspective view showing a part of the driving source 9. As described above, the driving source 9 includes the motor 90, the cylinder 91 connected to the motor 90, and the rod 92 housed in the cylinder 91.

[0067] A cap 97 is attached to the tip of the rod 92. The cap 97 has an attachment hole 97a that penetrates 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 form part of the connecting mechanism 94 described above.

[0068] The motor 90 is provided with a pair of protrusions 98 aligned in the width direction Y. These protrusions 98 have mounting holes 98a penetrating in the width direction Y. A pivot pin 99 passes through the mounting holes 98a. Both ends of the pivot pin 99 protrude from the respective mounting holes 98a. The pair of protrusions 98 and the pivot pin 99 form part of the above-mentioned connecting mechanism 93.

[0069] Fig. 9 is a schematic perspective view showing a part of the coupling mechanism 93. Fig. 10 is a schematic front view showing a part of the coupling mechanism 93. The pivot pin 99 is omitted in Fig. 9. As shown in Figs. 9 and 10, the coupling mechanism 93 includes a bracket 100, a pair of locking pieces 110, and a pair of fixing members 120.

[0070] 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 the side walls 101. Each side wall 101 has a recess 103 (groove) recessed along the vertical direction Z.

[0071] 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, for example, a plate made of metal or synthetic resin, and extends longitudinally in the vertical direction Z.

[0072] Each of the locking pieces 110 has a circular opening 112. These openings 112 overlap with the recesses 103 in the width direction Y.

[0073] In the example of FIG. 9 , a slit 104 and a female screw 105 are formed in the left side wall 101. A claw 111 is formed in the left locking piece 110. The claw 111 is passed through the slit 104 and protrudes inside the side wall 101. The fixing member 120 is, for example, a male screw, which passes through a through hole formed 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.

[0074] 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.

[0075] 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.

[0076] When attaching the pivot pin 99, the pivot pin 99 is lowered from above toward the recess 103 (see FIG. 9 ) as shown by the arrow in FIG. 10 . 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. When the pivot pin 99 is further lowered from this state, the pair of locking pieces 110 are pushed 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 greater than the length of the pivot pin 99, and both ends of the pivot pin 99 are inserted into the openings 112. At this time, the locking pieces 110 are released from the force pushing them apart in the width direction Y and return to the shape shown in FIG. 9 .

[0077] As described above, in this embodiment, by lowering the pivot pin 99 toward the recess 103, the pivot pin 99 can be connected to the bracket 100 without any special operation. 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. Note that the pivot pin 99 is rotatable when it is passed through the opening 112. Because 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 restricted.

[0078] When removing the pivot pin 99 from the bracket 100, the worker, 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.

[0079] 11 is a schematic perspective view of the leg member 3 attached to the frame material 40L of the lower frame 4. The leg member 3 is used to securely position the bed apparatus 1 on the floor surface, and is made of, for example, synthetic resin.

[0080] The leg member 3 is fixed to an end of the frame material 40L by a fixing pin 200. In the following description, this end of the frame material 40L is referred to as an attachment portion 400. The fixing pin 200 has a handle portion 201 having an elongated shape.

[0081] The leg component 3 has an attachment portion 30R for attaching the fixing pin 200. The attachment portion 30R is provided with a mark M indicating the fixing position P1 of the fixing pin 200. By rotating the handle portion 201 to the fixing position P1, the fixing pin 200 engages with the leg component 3 and the attachment portion 400. On the other hand, by rotating the handle portion 201 to the release position P2, this engagement is released. The release position P2 is, for example, a position that forms an angle of 90° with the fixing position P1 in the rotation direction of the fixing pin 200.

[0082] 12 is a schematic cross-sectional perspective view of the leg component 3. The leg component 3 has a storage section 31 capable of storing the attachment section 400. The storage section 31 is surrounded by walls on all four sides, and has an open end in the longitudinal direction X. A stopper 32 that receives the attachment section 400 is provided at the end of the storage section 31 in the longitudinal direction X.

[0083] The storage section 31 is located between a pair of side walls 33L, 33R in the width direction Y. The side wall 33R is provided with the attachment section 30R, which is also shown in Fig. 11. The side wall 33L is provided with the attachment section 30L.

[0084] The mounting portion 30R has a mounting hole 300 penetrating the side wall 33R, a counterbore 301 provided on the outer surface of the side wall 33R, and a groove 302 provided on the inner surface of the side wall 33R. The mounting hole 300 communicates with the accommodation portion 31. The counterbore 301 is provided around the mounting hole 300 and has a substantially circular planar shape. The groove 302 is not provided around the entire axis of the mounting hole 300, but is provided only on a portion of it.

[0085] In this embodiment, the leg member 3 has a shape that is plane-symmetrical with respect to the XZ plane defined by the longitudinal direction X and the vertical direction Z. Therefore, the structures of the side wall 33L and the mounting portion 30L are similar to those of the side wall 33R and the mounting portion 30R.

[0086] As shown by the dashed line in Figure 12, the mounting hole 300 has a basic circular shape. Furthermore, the mounting hole 300 has a pair of enlarged portions 300a aligned in the first direction D1. The mounting hole 300 can also be said to have an elongated shape in the first direction D1. The first direction D1 is, for example, parallel to the vertical direction Z, but is not limited to this example.

[0087] Fig. 13 is a schematic perspective view of the mounted portion 400 and the fixing pin 200. Fig. 14 is a schematic side view of the mounted portion 400. Fig. 13 also shows the blocking pin 210 attached to the attachment portion 30L.

[0088] 13, the mounting portion 400 has a hollow structure surrounded by walls. Specifically, the walls of the mounting portion 400 have a pair of side walls 450, 460 aligned in the width direction Y, a bottom wall 470 connecting the lower ends of the side walls 450, 460, and a top wall 480 connecting the upper ends of the side walls 450, 460.

[0089] The side wall 450 has a mounting hole 451 into which the fixing pin 200 is inserted. The mounting hole 451 penetrates between the inner and outer surfaces of the side wall 450. As shown in FIG. 14 , the mounting hole 451 has a basic circular shape. Furthermore, the mounting hole 451 has a pair of enlarged portions 451a aligned in a first direction D1. The mounting hole 451 can also be said to have a shape that is elongated in the first direction D1, or a shape whose width in the first direction D1 is greater than its width in a second direction D2 perpendicular to the first direction D1. The second direction D2 is, for example, parallel to the longitudinal direction X, but is not limited to this example.

[0090] The side wall 450 further has a mounting hole 452. The mounting hole 452 is, for example, a circular through-hole, and is located closer to the end of the mounting portion 400 than the mounting hole 451. The side wall 460 has a mounting hole 462 at a position opposite the mounting hole 452 in the width direction Y. The shape of the mounting hole 462 is the same as that of the mounting hole 452.

[0091] The bottom wall 470 has a mounting hole 471. The mounting hole 471 is circular and has a larger opening area than the mounting holes 451, 452, and 462, for example.

[0092] 15 is a schematic perspective view of the fixing pin 200 and the blocking pin 210. The fixing pin 200 has the handle portion 201 described above, a shaft portion 202 extending from the handle portion 201, a pair of engagement portions 203, and a flange portion 204.

[0093] Each engagement portion 203 is a protrusion provided at the tip of shaft portion 202 and extending in protruding direction D3 intersecting the extension direction of shaft portion 202. Handle portion 201 has an elongated shape in protruding direction D3. Flange portion 204 is provided at the base of shaft portion 202 and protrudes in an annular shape in a direction intersecting the extension direction of shaft portion 202.

[0094] The blocking pin 210 has a head 211, a shaft 212 extending from the head 211, and a pair of engagement portions 213. The head 211 is disk-shaped. Each engagement portion 213 is a protrusion provided at the tip of the shaft 212 and extending in a protruding direction D4 that intersects with the extension direction of the shaft 212.

[0095] 16 is a schematic cross-sectional view of the leg member 3, the attachment portion 400, the fixing pin 200, and the blocking pin 210. This figure shows a state in which the attachment portion 400 is inserted into the accommodation portion 31 of the leg member 3, the fixing pin 200 is attached to the attachment portion 30R, and the blocking pin 210 is attached to the attachment portion 30L.

[0096] When the mounted portion 400 is housed deep in the housing portion 31, the mounting hole 300 of the mounting portion 30R and the mounting hole 451 of the mounted portion 400 overlap in the width direction Y. At this time, the pair of enlarged portions 300a shown in FIG. 12 and the pair of enlarged portions 451a shown in FIG. 14 also overlap in the width direction Y.

[0097] The shaft 202 of the fixing pin 200 and each engaging portion 203 can be inserted into or removed from the mounting holes 300, 451 by aligning the protruding direction D3 of the engaging portions 203 with the first direction D1, which is the longitudinal direction of the mounting holes 300, 451. That is, when the protruding direction D3 is aligned with the first direction D1, each engaging portion 203 can pass through the enlarged portion 300a of the mounting hole 300 and the enlarged portion 451a of the mounting hole 451. When the protruding direction D3 is misaligned with the first direction D1 by a predetermined angle, each engaging portion 203 abuts on the periphery of the mounting hole 300 and cannot be inserted into the mounting hole 300.

[0098] By inserting the shaft portion 202 into the mounting holes 300 and 451 and rotating the fixing pin 200 so that the protruding direction D3 coincides with the second direction D2, the engaging portions 203 engage with the inner surface of the side wall 450 as shown in Fig. 16. The fixing position P1 shown in Fig. 11 indicates the position of the handle portion 201 where the engaging portions 203 engage with the inner surface of the side wall 450. When the fixing pin 200 is inserted into the mounting holes 300 and 451, the flange portion 204 is accommodated in the counterbore portion 311.

[0099] To remove the fixing pin 200 from the mounting portion 30R, the handle portion 201 is rotated to the release position P2 shown in Figure 11. At this time, the protruding direction D3 coincides with the first direction D1, and the engagement between each engaging portion 203 and the inner surface of the side wall 450 is released. In this state, the shaft portion 202 and each engaging portion 203 can be removed from the mounting holes 300, 451.

[0100] The blocking pin 210 is intended to block the mounting hole 300 of the mounting portion 30L and does not contribute to fixing the leg member 3 and the mounted portion 400 together. The shaft 212 of the blocking pin 210 and each engaging portion 213 can be inserted into or removed from the mounting hole 300 by aligning the protruding direction D4 of the engaging portion 213 with the first direction D1, which is the longitudinal direction of the mounting hole 300. That is, when the protruding direction D4 is aligned with the first direction D1, each engaging portion 213 can pass through the enlarged portion 300a of the mounting hole 300. When the protruding direction D4 is misaligned with the first direction D1 by a predetermined angle, each engaging portion 213 abuts on the periphery of the mounting hole 300 and cannot be inserted into the mounting hole 300.

[0101] By inserting the shaft portion 212 into the mounting hole 300 and rotating the blocking pin 210 so that the protruding direction D4 coincides with the second direction D2, each engaging portion 213 engages with the inner surface of the side wall 33L as shown in Figure 16. At this time, each engaging portion 213 is positioned in the groove portion 302.

[0102] When removing the blocking pin 210 from the mounting portion 30L, the blocking pin 210 is rotated so that the protruding direction D4 coincides with the first direction D1. This releases the engagement between each engaging portion 213 and the inner surface of the side wall 33L. In this state, the shaft portion 212 and each engaging portion 213 can be removed from the mounting hole 300.

[0103] In this way, the leg member 3 according to this embodiment can be attached to the attachment portion 400 without using screws, bolts, etc. Therefore, no tools are required for attaching or detaching the leg member 3.

[0104] 11 to 16 show an example of a structure for attaching the leg member 3 to one end of the frame material 40L. The structure for attaching the leg member 3 to the other end of the frame material 40L and the structure for attaching the leg members 3 to both ends of the frame material 40R are also similar to the examples shown in FIGS.

[0105] As described above, the leg members 3 have a shape that is plane-symmetrical with respect to the XZ plane. Therefore, the four leg members 3 shown in Fig. 2 can have the same shape. A fixing pin 200 and a blocking pin 210 are selectively fitted into the mounting portions 30L, 30R.

[0106] The leg members 3 can be replaced with casters depending on the application of the bed apparatus 1. Fig. 17 is a schematic perspective view of the lower frame 4 to which the casters 500 are attached. A portion of the caster 500 is inserted into the attachment portion 400, for example, through the attachment hole 471 shown in Fig. 13. In this state, the caster 500 is fixed to the attachment portion 400 by connecting a fixing member 510 such as a screw to the portion through the attachment holes 452, 462. As another example, the caster 500 may be fixed to the attachment portion 400 by the fixing pin 200 described above.

[0107] In the present embodiment described above, as explained using FIGS. 2 to 7, the end of the link member 7 can be easily attached to the lower frame 4 by the attachment mechanisms 76L, 76R. Also, the end of the link member 8 can be easily attached to the upper frame 5 by the attachment mechanisms 84L, 84R. Also, as explained using FIGS. 8 to 10, the drive source 9 can be easily attached to the lower frame 4 by the connecting mechanism 93. Also, as explained using FIGS. 11 to 16, the leg member 3 can be easily attached to the lower frame 4. Furthermore, according to the configuration of this embodiment, no special tools are required for these attachment operations. Therefore, the bed apparatus 1 can be assembled and disassembled extremely easily.

[0108] The bed apparatus obtained from this embodiment is exemplified below. [1] a first frame and a second frame aligned in the vertical direction and elongated in the longitudinal direction; a link member connected to the first frame and the second frame; a first attachment mechanism that attaches the link member to the first frame; a second attachment mechanism that attaches the link member to the second frame; Equipped with The first attachment mechanism is a first roller provided on the link member; a wall member provided on the first frame, forming a storage space for the first roller and having an entrance opening in the vertical direction; a movable member provided at a position overlapping the entrance in the vertical direction, the movable member being movable between a closed state in which the movable member protrudes into the storage space and an open state in which the movable member retracts from the storage space; an elastic body that biases the movable member toward the closed state; Equipped with When the first roller is accommodated in the accommodation space and the movable member is in the closed state, the first roller faces the movable member in the longitudinal direction, and movement of the first roller toward the entrance / exit is restricted, When the movable member is in the open state, the first roller can be taken in and out of the accommodation space through the entrance. Bed equipment. [2] The second attachment mechanism is a second roller provided on the link member; a rail provided on the second frame and configured to hold the second roller movably in the longitudinal direction; Equipped with The bed device according to [1] above. [3] a drive source that rotates the link member around an axis parallel to the width direction of the first frame and the second frame to change the distance between the first frame and the second frame in the vertical direction, The bed apparatus according to the above [1] or [2]. [4] a first frame and a second frame aligned in the vertical direction and elongated in the longitudinal direction; a link member connected to the first frame and the second frame; a drive source that rotates the link member around an axis parallel to a width direction of the first frame and the second frame to change the distance between the first frame and the second frame in the vertical direction; a first coupling mechanism that rotatably couples the drive source to the first frame; a second coupling mechanism that rotatably couples the drive source to the link member; Equipped with The first connecting mechanism is a bracket provided on the first frame, the bracket including a pair of side walls each having a recess recessed in the vertical direction and aligned in the width direction; a pair of locking pieces provided on outer surfaces of the pair of side walls, each having an opening overlapping the recess in the width direction; a pin provided on the driving source and passed through the recesses of the pair of side walls and the openings of the pair of locking pieces; Equipped with The pair of locking pieces have flexibility that allows them to bend so that the distance between the openings in the width direction is greater than the length of the pin. Bed equipment. [5] The pair of locking pieces each have a tapered portion inclined with respect to the vertical direction so that the distance between them in the width direction increases toward the tip. The bed device according to [4] above. [6] A leg member; a bed frame having a mounting portion to which the leg member is attached; a fixing pin for fixing the leg member to the bed frame; Equipped with The fixing pin is The handle and a shaft portion extending from the handle portion; an engaging portion provided at the tip of the shaft portion; and the mount portion has a first mounting hole into which the shaft portion can be inserted, The leg member is a housing portion capable of housing the mounted portion; a second mounting hole that communicates with the accommodation portion and overlaps with the first mounting hole when the mount portion is accommodated in the accommodation portion; and The shaft portion is inserted into the first mounting hole and the second mounting hole, and the handle portion is rotated to a fixed position, whereby the engaging portion engages with the mount portion; By rotating the handle from the fixed position to the release position, the engagement between the engagement portion and the attached portion is released. Bed equipment. [7] the engaging portion is a protrusion extending from a tip of the shaft portion in a protruding direction intersecting with an extending direction of the shaft portion, the first mounting hole penetrates between the inner surface and the outer surface of the wall portion of the mounting portion and has a shape that is elongated in a first direction; By aligning the protruding direction with the first direction, the shaft portion and the engaging portion can be inserted into and removed from the first mounting hole and the second mounting hole, The shaft portion is inserted into the first mounting hole and the second mounting hole, and the fixing pin is rotated so that the protruding direction coincides with a second direction intersecting the first direction, whereby the engaging portion engages with the inner surface of the mounted portion. The bed device according to [6] above.

[0109] Here, one of the lower frame 4 and the upper frame 5 is an example of a first frame, and the other is an example of a second frame. The mounting mechanisms 76L, 76R, 84L, and 84R are an example of a first mounting mechanism. The mounting mechanisms 77L, 77R, 83L, and 83R are an example of a second mounting mechanism. The rollers 78L, 78R, 86L, ​​and 86R are an example of a first roller. The rollers 79L, 79R, 85L, and 85R are an example of a second roller. The connecting mechanism 93 is an example of a first connecting mechanism. The connecting mechanism 94 is an example of a second connecting mechanism. The mounting hole 451 is an example of a first mounting hole. The mounting hole 300 is an example of a second mounting hole.

[0110] The scope of 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]

[0111] 1...bed device, 2...bed frame, 3...leg member, 4...lower frame, 5...upper frame, 6...lifting mechanism, 7, 8...link member, 9...driving source, 10...bed plate body, 43...wall member, 44...movable member, 45...rotating pin, 46...elastic body, 76L, 76R, 77L, 77R, 83L, 83R, 84L, 84R...mounting mechanism, 93, 94...connecting mechanism, 110...locking piece, 200...fixing pin, 210...blocking pin, P1...fixed position, P2...release position, S...storage space, X...longitudinal direction, Y...width direction, Z...vertical direction.

Claims

1. Bed frame and a link member connected to the bed frame; a drive source that rotates the link member around an axis parallel to the width direction of the bed frame; a first connecting mechanism that rotatably connects the driving source to the bed frame; a second coupling mechanism that rotatably couples the drive source to the link member; Equipped with The first connecting mechanism is a bracket provided on the bed frame, the bracket including a pair of side walls aligned in the width direction and each having a recess recessed in a direction intersecting the width direction; a pair of locking pieces provided on outer surfaces of the pair of side walls, each having an opening overlapping the recess in the width direction; a pin provided on the driving source and passed through the recesses of the pair of side walls and the openings of the pair of locking pieces; a fixing member that fixes the pair of locking pieces to the pair of side walls so that the gap between the pair of locking pieces in the width direction of the opening can be expanded to a value greater than the length of the pin; A bed apparatus comprising:

2. The pair of locking pieces each have a tapered portion that is inclined so that the distance between them in the width direction increases toward the tip. The bed apparatus according to claim 1 .

3. When attaching the pin to the bracket and the pair of locking pieces, if the pin is lowered with both ends of the pin in contact with the tapered portions of the pair of locking pieces, the pair of locking pieces are pushed apart in the width direction, and when the pin reaches the recesses in the pair of side walls, the spacing between the openings of the pair of locking pieces in the width direction becomes larger than the length of the pin, and both ends of the pin are inserted into the openings of the pair of locking pieces, respectively. The bed apparatus according to claim 2.

4. the fixing member is a long plate material, the fixing members fix the pair of locking pieces to the pair of side walls below the openings of the pair of locking pieces and below the recesses of the pair of side walls, respectively; The bed apparatus according to claim 1 .

5. The bed frame has a first frame and a second frame that are aligned vertically and are elongated in a longitudinal direction, the link member is connected to the first frame and the second frame, the drive source changes the distance between the first frame and the second frame in the vertical direction by rotating about the axis; 5. The bed apparatus according to claim 1, wherein the bed apparatus is a bed-type bed.

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