Folding bed

Abstract

To provide a folding bed that enhances the stability of the movement of the rotating frame when folding and unfolding. [Solution] This folding bed 10 comprises a fixed body 20 and a movable frame 30. The movable frame 30 has a first leg portion 40 separate from the fixed body 20, a first mounting portion 50 positioned close to the fixed body 20, a second mounting portion 60 positioned adjacent to the first mounting portion 50, a first pivot support portion 55 that rotatably supports the first mounting portion 50 on the first leg portion 40, and a second pivot support portion 70 that rotatably supports the second mounting portion 60 on the first mounting portion 50. The first leg portion 40 has a load-receiving portion that receives the load of the first mounting portion 50 via the first pivot support portion 55 at a position spaced apart from the fixed body 20 toward the second mounting portion 60.

Description

Technical Field

[0001] The present invention relates to a folding bed that can be folded into an inverted V-shaped folded state and a horizontal unfolded state.

Background Art

[0002] Conventionally, a folding bed that can be folded into an inverted V-shaped folded state and a horizontal unfolded state has been used. As such a folding bed, there are an end-point fixed type in which one end side of the bed frame is fixed and the other end side is movable, and a both-ends movable type in which both ends are movable.

[0003] As the former end-point fixed type folding bed, for example, in Patent Document 1 below, there is described a folding bed including a support body disposed on the head side and serving as a fixed end, a first placement frame rotatably supported by the support body, and a second placement frame rotatably connected to the first placement frame. The support body has a frame shape including a pair of vertical frames disposed on both side portions in the width direction, a bottom frame extending forward from the lower end portions of the vertical frames, and a pair of front vertical frames disposed in front of the pair of vertical frames rising from the bottom frame.

[0004] Further, from the lower portions of the respective front vertical frames of the support body, triangular support plates project inward in the width direction of the bed, and support shafts are supported on the respective triangular support plates. And one end portion of the first placement frame is rotatably supported by this support shaft (see FIG. 6 of Patent Document 1). That is, one end portion of the first placement frame is rotatably supported by a pair of front vertical frames constituting the support body via a support shaft.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In the case of the folding bed described in Patent Document 1 above, when the first mounting frame and the second mounting frame are brought close together to form a folded state, or when the two mounting frames are separated to form an unfolded state, the load from one end of the first mounting frame is transmitted to the triangular support plate and each front vertical frame of the frame body via the support shaft.

[0007] In this case, because each front vertical frame is relatively tall, the load transmitted from the first mounting frame to each front vertical frame of the frame body can cause problems such as each front vertical frame swaying or swaying laterally, resulting in unstable operation of the first and second mounting frames.

[0008] Furthermore, if the strength or rigidity of each front vertical frame of the frame was insufficient or if it was too light, the load-bearing capacity of each front vertical frame against the load from the first mounting frame may be insufficient, which could lead to unstable operation of the first and second mounting frames.

[0009] Therefore, the object of the present invention is to provide a folding bed that can improve the stability of the operation of the rotating frame when it is folded and when it is unfolded. [Means for solving the problem]

[0010] To achieve the above objective, the folding bed according to the present invention comprises a fixed body installed on the head side or foot side of the bed user, a movable frame with one end supported by the fixed body and movable to an inverted V-shaped folded state and a horizontal unfolded state, wherein the movable frame is separate from the fixed body and has a first leg portion that is directly fixed to the fixed body or indirectly fixed via a fastener, a frame-like structure having at least one pair of vertical frames extending in the longitudinal direction of the bed on which bedding is placed, a first mounting portion positioned close to the fixed body in the longitudinal direction of the bed, and at least one pair of vertical frames extending in the longitudinal direction of the bed The bed frame has a frame-like structure on which the equipment is placed, and is located adjacent to the first mounting portion on the opposite side of the bed in the longitudinal direction from the fixed body. The bed frame has a first pivot support portion that rotatably supports one end of each vertical frame of the first mounting portion to the first leg portion, and a second pivot support portion that rotatably supports one end of each vertical frame of the second mounting portion to the other end of the corresponding vertical frame of the first mounting portion. The first leg portion is provided with the first pivot support portion at a position spaced apart from the fixed body toward the second mounting portion, and has a load-receiving portion that receives the load of the first mounting portion via the first pivot support portion.

[0011] According to the present invention, one end of each vertical frame of the first mounting section is rotatably connected to a first pivot support section provided on the load-receiving section of the first leg section, which is separate from the fixed body. Furthermore, the load-receiving section of the first leg section is spaced apart from the fixed body toward the second mounting section. Therefore, during the folding and unfolding operations of the movable frame, the load applied from one end of the first mounting section is first transmitted to the load-receiving section of the first leg section via the first pivot support section, and then transmitted to the fixed body via the first leg section, or received by the load-receiving section.

[0012] In other words, since the first leg is separate from the fixed body and the load-receiving portion is spaced apart from the fixed body, the load from the first mounting portion is not directly transmitted to the fixed body, but is indirectly transmitted to the fixed body via the first leg, which includes the load-receiving portion, or is received by the load-receiving portion.

[0013] As a result, the transmission path of the load from the first mounting section to the fixed body can be made longer, thereby reducing (weakening) the load, or the load from the first mounting section can be received and absorbed by the load receiving section, thus preventing lateral swaying or shaking of the fixed body that occurs with the movement of the movable frame. This improves the stability of the rotational movement of the first mounting section, and consequently improves the stability of the folding and unfolding of the movable frame.

[0014] In the folding bed according to the present invention, the first leg portion may have a pair of first arm portions, one end of which is connected to the lower end of the fixed body and extending toward the second mounting portion for a predetermined length, and a pair of second arm portions erected so as to intersect with the extension direction of the first arm portions, wherein the second arm portions constitute the load-receiving portion.

[0015] According to the above embodiment, since the first leg portion has the above configuration, the first arm portion can reliably and firmly connect the first leg portion to the lower end of the fixed body, and the second arm portion, which forms the load-receiving portion, can stably rotate and support one end of each vertical frame of the first mounting portion.

[0016] Furthermore, since the first leg section has a relatively simple configuration consisting of a first arm section and a second arm section, it is possible to improve the manufacturability of the first leg section and reduce costs, while also increasing the overall strength and rigidity of the first leg section.

[0017] In the folding bed according to the present invention, the movable frame further has second leg portions connected to the other end of each vertical frame of the second mounting portion, and the second leg portions may be fitted with unidirectional casters that rotate only in the folding direction and the unfolding direction when the movable frame moves in the folding direction from the unfolded state so that one end of the first mounting portion and the other end of the second mounting portion come closer together, and when it moves in the unfolding direction so that one end of the first mounting portion and the other end of the second mounting portion move further apart from the folded state.

[0018] According to the above aspect, since the unidirectional caster is attached to the second leg portion, when the movable frame moves, the second placement portion can be moved closer to or away from the first placement portion, and the movement of the movable frame can be smoothly performed with a light force.

Effect of the Invention

[0019] According to the present invention, since the first leg portion is a separate body from the fixed body and the load receiving portion is separated from the fixed body, a long transmission path of the load from the first placement portion to the fixed body can be ensured to reduce the load, or the load from the first placement portion can be received and absorbed by the load receiving portion. Therefore, it is possible to prevent lateral displacement or lateral sway of the fixed body accompanying the movement of the movable frame, improve the stability of the rotation operation of the first placement portion, and improve the stability when the movable frame is folded and deployed.

Brief Description of the Drawings

[0020] [Figure 1] Shows an embodiment of a folding bed according to the present invention, which is a perspective view of the movable frame in a deployed state. [Figure 2] It is a side view of the folding bed. [Figure 3] It is a front view of the folding bed. [Figure 4] It is the movable frame constituting the folding bed, which is a perspective view in a slightly folded state. [Figure 5] It is a perspective view of the first leg portion constituting the folding bed. [Figure 6] It is an enlarged perspective view of the main part of the second leg portion constituting the folding bed. [Figure 7] In the folding bed, it is a perspective view of the movable frame in a folded state.

Mode for Carrying Out the Invention

[0021] (An Embodiment of a Folding Bed) Hereinafter, with reference to the drawings, one embodiment of the folding bed according to the present invention will be described.

[0022] As shown in Figures 1 and 2, the folding bed 10 in this embodiment (hereinafter also simply referred to as "bed 10") comprises a fixed body 20 installed on the head side or foot side of the bed user, and a movable frame 30, one end of which is supported by the fixed body 20, and which is movable to an inverted V-shaped folding state and a horizontal unfolded state.

[0023] Furthermore, as shown in Figure 4, the movable frame 30 comprises a first leg portion 40 separate from the fixed body 20, a first mounting portion 50 which is frame-shaped on which the bedding 1 is placed and is positioned close to the fixed body 20, a second mounting portion 60 which is frame-shaped on which the bedding 1 is placed and is positioned adjacent to the first mounting portion 50, a first rotating support portion 55 which rotatably supports one end of the first mounting portion 50 on the first leg portion 40, and one end of the second mounting portion 60 on the first mounting portion 5 It is mainly composed of a second pivot support part 70 that is rotatably supported on the other end of the first leg part 40, a second leg part 80 connected to the other end of the second mounting part 60, a third pivot support part 90 that rotatably supports the other end of the second mounting part 60 on the second leg part 80, a first link 78 that connects the first leg part 40 and the second pivot support part 70 to each other, and a second link 79 that connects the second leg part 80 and the second pivot support part 70 to each other.

[0024] The bedding 1 placed on the first mounting section 50 and the second mounting section 60 can be a mattress, a futon, or the like. The bedding 1 is fixed to the first mounting section 50 and the second mounting section 60 by fasteners such as bolts. The bedding 1 may also be fixed to the first mounting section 50 and the second mounting section 60 in a detachable manner by a detachable structure (such as hook-and-loop fasteners or detachable clips) not shown. In other words, the method of fixing the bedding 1 to each mounting section 50, 60 can be fixed or detachable.

[0025] By the way, this bed 10 has a structure in which the fixing body 20, the first mounting part 50, and the second mounting part 60 are arranged in order and extend long in one direction. However, in this invention, "bed longitudinal direction" means the direction parallel to the direction in which the fixing body 20, the first mounting part 50, and the second mounting part 60 are arranged (arrangement direction). In the following explanation, this will be referred to as "bed longitudinal direction L". Also, when viewing the bed 10 from a planar direction, the direction perpendicular to the bed longitudinal direction L will be referred to as "bed width direction W".

[0026] In addition, in the first leg portion 40, the first mounting portion 50, the second mounting portion 60, the second leg portion 80, etc., "one end" refers to the end adjacent to the fixed body 20, and "the other end" refers to the end spaced away from the fixed body 20.

[0027] First, the fixing body 20 will be described in detail. The fixing body 20 in this embodiment is a frame-like structure that is a substantially long plate shape extending vertically with respect to the bed installation surface and consists of a pair of side walls 21, 21 arranged parallel to each other at a predetermined interval, an upper connecting portion 22 that extends along the bed width direction W and whose ends are connected to the upper part of the pair of side walls 21, 21, and an intermediate connecting portion 23 that extends along the bed width direction W and is connected to the middle part of the pair of side walls 21, 21 in the height direction.

[0028] Furthermore, as shown in Figure 2, each side wall 21 is provided with a fixing portion 24 at its lower end 21a for securing it to the first leg portion 40.

[0029] The material of the fixing body 20 can be, for example, wood, metal, plastic, or a combination of these materials.

[0030] Next, the first mounting section 50 and the second mounting section 60 will be described in detail.

[0031] As shown in Figures 1-4, the first mounting section 50 has at least one pair of vertical frames 51, 51 extending in the longitudinal direction L of the bed, forming a frame on which the bedding 1 is placed, and is positioned in close proximity to the fixing body 20 in the longitudinal direction L of the bed.

[0032] More specifically, as shown in Figure 4, the first mounting section 50 of this embodiment is frame-shaped and consists of a pair of vertical frames 51, 51 extending along the longitudinal direction L of the bed and arranged parallel to each other, a horizontal frame 52 extending along the width direction W of the bed and connecting the pair of vertical frames 51, 51 to each other at one end 51a in the extending direction of the vertical frame 51, and a plurality of horizontal frames 53, 53 arranged parallel to the horizontal frame 52 and connecting the pair of vertical frames 51, 51 to each other in the middle portion in the extending direction of the vertical frame 51. The end 51a of the vertical frame 51 has a rounded, substantially arc shape. Furthermore, the vertical frame 51, its end 51a in the extending direction, and the horizontal frame 52 are integrally molded structures formed by bending a single pipe with an elliptical cross-section.

[0033] Furthermore, the second mounting section 60 has at least one pair of vertical frames 61, 61 extending in the longitudinal direction L of the bed, forming a frame on which the bedding 1 is placed, and is located adjacent to the first mounting section 50 on the opposite side of the bed's longitudinal direction L from the fixing body 20.

[0034] More specifically, as shown in Figure 4, the second mounting section 60 of this embodiment is frame-shaped and consists of a pair of vertical frames 61, 61 extending along the longitudinal direction L of the bed and arranged parallel to each other, a horizontal frame 62 extending along the width direction W of the bed and connecting the pair of vertical frames 61, 61 to each other at the other end 61b in the extension direction of the vertical frames 61, and a plurality of horizontal frames 63, 63 arranged parallel to the horizontal frame 62 and connecting the pair of vertical frames 61, 61 to each other in the intermediate portion in the extension direction of the vertical frames 61. The other end 61b of the vertical frames 61 has a rounded, substantially arc shape. Furthermore, the vertical frames 61, their other end 61b in the extension direction, and the horizontal frames 62 are integrally molded structures formed by bending a single pipe with an elliptical cross-section.

[0035] Furthermore, a pair of leg mounting frames 64, 64 extending along the longitudinal direction L of the bed are installed between the horizontal frame 62 and the horizontal frame 63 adjacent to the horizontal frame 62.

[0036] Next, the first leg portion 40 will be described in detail. This first leg portion 40 is separate from the fixing body 20 and is either directly fixed to the fixing body 20 or indirectly fixed via a fixing device (not shown), and is installed on the bed mounting surface to support the load on one end of the bed 10 in the longitudinal direction L of the bed.

[0037] In this embodiment, the first leg portion 40 has one end 41a connected to the lower end 21a of the fixed body 20 and a pair of first arm portions 41, 41 that extend for a predetermined length along the longitudinal direction L of the bed and toward the second mounting portion 60, and a pair of second arm portions 42, 42 that are erected so as to intersect the extension direction of the first arm portions 41.

[0038] Furthermore, the first leg portion 40 of this embodiment has one leg body 43 consisting of a first arm portion 41 and a second arm portion 42, which is arranged on one side in the bed width direction W, and the other leg body 43 consisting of a first arm portion 41 and a second arm portion 42, which is arranged on the other side in the bed width direction W. In other words, the first leg portion 40 of this embodiment has a pair of left and right leg bodies 43, 43 arranged in the bed width direction W.

[0039] Furthermore, the left and right pairs of legs 43, 43 are connected to each other via a rod-shaped connecting portion 44 that extends along the width direction W of the bed. Specifically, the ends of the connecting portion 44 in the extending direction are fixed to the lower part of the second arm portion 42 of one leg 43 and the second arm portion 42 of the other leg 43, thereby integrating the two legs 43, 43 to form the first leg portion 40.

[0040] Furthermore, one first arm portion 41 and the other first arm portion 41 are arranged parallel to each other, and one second arm portion 42 and the other second arm portion 42 are also arranged parallel to each other (see Figure 5).

[0041] As shown in Figure 2, each first arm portion 41 extends for a predetermined length along the longitudinal direction L of the bed, and one end 41a in the direction of extension is indirectly fixed to a fixing portion 24 provided on the lower end 21a of the side wall 21 of the fixing body 20 via a fixing device (not shown) such as a bolt or screw. In this case, a gap is formed between the upper surface of each first arm portion 41 of the first leg portion 40 and the lower end surface of the lower end 21a of each side wall 21 of the fixing body 20 (see Figure 2).

[0042] Furthermore, from a point offset towards the other end 41b of each first arm portion 41, a second arm portion 42 is erected perpendicular to the extension direction of the first arm portion 41 (see Figure 2). In other words, each leg body 43 can be said to have a roughly inverted T shape. In addition, plate-shaped support pieces 45 extend from the upper inward side of each second arm portion 42 toward the fixed body 20. Each support piece 45 protrudes for a predetermined length from one side edge of the second arm portion 42 in the longitudinal direction L of the bed.

[0043] Furthermore, a first rotating support portion 55 is provided at the tip of the extending end of each support piece 45 provided on each second arm portion 42. In this embodiment, the first rotating support portion 55 is a pin-shaped support shaft with a circular outer circumference extending to a predetermined length, which is inserted into an axis support hole (not shown) formed at one end 51a of each vertical frame 51 of the first mounting portion 50.

[0044] Furthermore, the first leg portion 40 has a first pivot support portion 55 provided at a position spaced apart from the fixed body 20 toward the second mounting portion 60, and also has a load-receiving portion that receives the load of the first mounting portion 50 via the first pivot support portion 55.

[0045] In other words, one end 41a of each first arm portion 41 in the extending direction is indirectly fixed to fixing portions 24, 24 provided on the lower ends 21a, 21a of a pair of side walls 21, 21 of the fixing body 20 via fixing devices (bolts, screws, etc.) not shown, thereby fixing the first leg portion 40, which is separate from the fixing body 20, to the fixing body 20.

[0046] As described above, with the first leg portion 40 fixed to the fixing body 20, as shown in Figure 2, the second arm portion 42 is spaced a predetermined length away from the other side edge 21b of the side wall 21 of the fixing body 20 in the longitudinal direction L of the bed, toward the second mounting portion 60.

[0047] Furthermore, a pair of second arm portions 42, including the support piece 45, are positioned outside one end 51a, 51a of the pair of vertical frames 51, 51 of the first mounting portion 50, and the first rotatable support portion 55 is inserted into and supported in the axial support hole of one end 51a of the vertical frame 51, thereby allowing one end of the first mounting portion 50 to rotatably support the first leg portion 40 (see Figure 4).

[0048] Then, from the deployed state of the movable frame 30 shown in Figure 2 (a state in which one end of the first mounting section 50 and the other end of the second mounting section 60 are separated and the movable frame 30 is deployed horizontally), by grasping predetermined locations on the mounting sections 50 and 60 and moving them closer together via the second rotating support section 70 in the direction in which one end of the first mounting section 50 and the other end of the second mounting section 60 are brought closer together, as shown by arrow R1 in Figure 2, the movable frame 30 is moved into a roughly inverted V-shaped folded state as shown in Figure 7. At this point, the load F (see Figure 2) from one end of the first mounting section 50 is first applied to the first rotating support section 55, then transmitted to the support piece 45, and then transmitted to the second arm section 42 via the support piece 45.

[0049] On the other hand, even when the movable frame 30 is moved from its folded state shown in Figure 7 (a state in which one end of the first mounting section 50 and the other end of the second mounting section 60 are close together and the movable frame 30 is folded into a roughly inverted V shape), for example, by grasping a predetermined location on the second mounting section 60 and moving the two mounting sections 50 and 60 apart via the second rotating support section 70 in a direction away from one end of the first mounting section 50 and the other end of the second mounting section 60, as shown by arrow R2 in Figure 7, to a horizontal unfolded state as shown in Figure 2, the load from one end of the first mounting section 50 is first applied to the first rotating support section 55, then transmitted to the support piece 45, and then transmitted to the second arm section 42 via the support piece 45.

[0050] As described above, when the movable frame 30 is moved via the second pivot support 70 in a direction that brings the two mounting sections 50 and 60 closer together or further apart, the load F from one end of the first mounting section 50 is transmitted in the order of the first pivot support 55, the support piece 45, and the second arm section 42.

[0051] In this case, as described above, the second arm portion 42 is spaced a predetermined length away from the other side edge 21b of the side wall 21 of the fixed body 20 in the longitudinal direction L of the bed, towards the second mounting portion 60. Therefore, the load F from one end of the first mounting portion 50 applied to the first rotating support portion 55 is prevented from being directly transmitted to the side wall 21 of the fixed body 20, and is instead received by the second arm portion 42. In other words, in this embodiment, the second arm portion 42 constituting the first leg portion 40 constitutes the "load receiving portion" in the present invention.

[0052] Furthermore, as shown in Figures 1 and 2, adjusters 46 are attached below each second arm portion 42, at both ends in the extension direction and near one end in the extension direction, to allow adjustment of the height of the first leg portion 40. In addition, as shown in Figure 5, plate-shaped link connecting pieces 47 are provided protruding from predetermined locations in the extension direction of the connecting portion 44.

[0053] Next, the second rotatable support section 70 will be described in detail. As mentioned above, this second rotatable support section 70 rotatably supports one end of the second mounting section 60 to the other end of the first mounting section 50.

[0054] Specifically, as shown in Figure 4, the second rotating support section 70 of this embodiment includes a columnar section 71 extending along the bed width direction W, a pair of inner support pieces 72, 72 fixed to both ends of the columnar section 71 in the extending direction, a pair of support shafts 73, 73 positioned at both ends of the inner support pieces 72, and a pair of outer support pieces 74, 74 positioned outside the pair of inner support pieces 72, 72 via the pair of support shafts 73, 73. As shown in Figures 1, 7, etc., covers 74a are fitted to the outside of the inner support pieces 72 and outer support pieces 74 to protect both support pieces 72, 74.

[0055] Then, as shown in Figure 4, the ends of the pair of inner support pieces 72, 72 are positioned inside the other ends 51b, 51b of the pair of vertical frames 51, 51 of the first mounting section 50, and inside the one ends 61a, 61a of the pair of vertical frames 61, 61 of the second mounting section 60, while the ends of the pair of outer support pieces 74, 74 are positioned outside the other ends 51b, 51b of the pair of vertical frames 51, 51 of the first mounting section 50, and outside the one ends 61a, 61a of the pair of vertical frames 61, 61 of the second mounting section 60, so that the other end 51b of the vertical frame 51 and the one end 61a of the vertical frame 61 are clamped by the inner support pieces 72 and the outer support pieces 74.

[0056] Furthermore, a predetermined pin-shaped support shaft 73 with a circular outer circumference is inserted through one shaft support hole (not shown) of the inner support piece 72, a shaft support hole (not shown) of the other end 51b of the vertical frame 51, and one shaft support hole (not shown) of the outer support piece 74, respectively. Another pin-shaped support shaft 73 with a circular outer circumference is inserted through the other shaft support hole (not shown) of the inner support piece 72, a shaft support hole of one end 71a of the vertical frame 61, and the other shaft support hole (not shown) of the outer support piece 74, respectively.

[0057] As a result, the second rotating support section 70 rotatably supports the other ends 51b, 51b of the pair of vertical frames 51, 51 of the first mounting section 50 with respect to one end 61a, 61a of the pair of vertical frames 61, 61 of the second mounting section 60.

[0058] Furthermore, rod-shaped central legs 75, 75 hang down from both ends of the columnar portion 71 in the extending direction, and a connecting portion 76 is connected to this pair of central legs 75, 75. As shown in Figures 1 and 2, when the two mounting portions 50, 60 are moved apart via the second pivot support portion 70 in a direction in which one end of the first mounting portion 50 and the other end of the second mounting portion 60 are separated and moved into a horizontally extended state, the lower ends of the pair of central legs 75, 75 come into contact with the bed mounting surface and become the part that supports the load in the central part of the bed 10 in the longitudinal direction L of the bed.

[0059] Furthermore, the distance between the pair of central legs 75, 75 is narrower than the distance between the pair of left and right leg bodies 43, 43 that constitute the first leg 40. As a result, as shown in Figure 7, when the two mounting sections 50, 60 are brought closer together via the second pivot support section 70 to be folded into a roughly inverted V shape, the pair of central legs 75, 75 are housed between the pair of leg bodies 43, 43 of the first leg 40, as shown in Figure 3.

[0060] Furthermore, as shown in Figure 4, a plate-shaped link connecting piece 77 is provided protruding from a predetermined location in the extending direction of the connecting portion 76. One end of the rod-shaped first link 78 in the extending direction is rotatably connected to the link connecting piece 47 of the first leg portion 40, and the other end of the first link 78 in the extending direction is rotatably connected to the link connecting piece 77 of the second rotating support portion 70, so that the first leg portion 40 and the second rotating support portion 70 are connected to each other via the first link 78.

[0061] Next, the second leg portion 80 will be described in detail. This second leg portion 80 is connected to the other end 61b side of each vertical frame 61 of the second mounting portion 60 and supports the load on the other end side of the bed 10 in the longitudinal direction L of the bed.

[0062] The second leg portion 80 of this embodiment has a pair of first arm portions 81, 81 that extend for a predetermined length along the longitudinal direction L of the bed, and a pair of second arm portions 82, 82 that are erected perpendicular to the extension direction of the first arm portions 81.

[0063] Furthermore, the second leg portion 80 of this embodiment has one leg body 83 consisting of a first arm portion 81 and a second arm portion 82, which is arranged on one side in the bed width direction W, and the other leg body 83 consisting of a first arm portion 81 and a second arm portion 82, which is arranged on the other side in the bed width direction W. In other words, the second leg portion 80 of this embodiment has a pair of left and right leg bodies 83, 83 arranged in the bed width direction W.

[0064] Furthermore, the left and right pairs of legs 83, 83 are connected to each other via a rod-shaped connecting portion 84 that extends along the width direction W of the bed. Specifically, the ends of the connecting portion 84 in the extending direction are fixed to the lower part of the second arm portion 82 of one leg 83 and the second arm portion 82 of the other leg 83, thereby integrating the two legs 83, 83 to form the second leg portion 80.

[0065] Furthermore, one first arm portion 81 and the other first arm portion 81 are arranged parallel to each other, and one second arm portion 82 and the other second arm portion 82 are also arranged parallel to each other (see Figure 5).

[0066] The connecting portion 84 is formed to be shorter than the connecting portion 44 of the first leg portion 40, and as a result, the distance between the pair of left and right leg bodies 83, 83 of the second leg portion 80 is narrower than the distance between the pair of left and right leg bodies 83, 83 of the first leg portion 40, and is also narrower than the distance between the pair of central leg bodies 75, 75 of the second pivot support portion 70.

[0067] As a result, as shown in Figure 7, when the mounting sections 50 and 60 are brought close together via the second pivot support section 70 and moved into a roughly inverted V-shaped folded state, they are housed between the pair of leg bodies 43, 43 of the first leg section 40 and between the pair of central leg bodies 75, 75 of the second pivot support section 70, as shown in Figure 3.

[0068] Furthermore, plate-shaped support pieces 85 extend from the upper inner side of each second arm portion 82 in the direction opposite to the fixed body 20. Each support piece 85 protrudes for a predetermined length from the other side edge of the second arm portion 82 in the longitudinal direction L of the bed.

[0069] Furthermore, a third pivot support portion 90 is provided at the tip of each support piece 85 in the extending direction of each second arm portion 82. In this embodiment, the third pivot support portion 90 is a pin-shaped support shaft with a circular outer circumference and extending for a predetermined length, which is inserted into an axis support hole (not shown) formed in the leg mounting frame 64 of the second mounting portion 60.

[0070] Then, a pair of second arm portions 82, including the support piece 85, are positioned outside predetermined locations on a pair of leg mounting frames 64, 64 of the second mounting portion 60, and a third pivot support portion 90 is inserted into and supported in an unillustrated shaft support hole of the leg mounting frame 64, thereby allowing the other end of the second mounting portion 60 to rotatably support the second leg portion 80.

[0071] Furthermore, as shown in Figure 4, a plate-shaped link connecting piece 87 is provided protruding from a predetermined location in the extending direction of the connecting portion 84. One end of the rod-shaped second link 79 in the extending direction is rotatably connected to the link connecting piece 77 of the second pivot support portion 70, and the other end of the second link 79 in the extending direction is rotatably connected to the link connecting piece 87 of the second leg portion 80, so that the second pivot support portion 70 and the second leg portion 80 are connected to each other via the second link 79.

[0072] Furthermore, the second leg portion 80 is fitted with a unidirectional caster 100 that rotates only in the folding direction and the unfolding direction when the movable frame 30 moves from a horizontal unfolded state to a folding direction in which one end of the first mounting portion 50 and the other end of the second mounting portion 60 move closer together, and when it moves from a roughly inverted V-shaped folded state to an unfolding direction in which one end of the first mounting portion 50 and the other end of the second mounting portion 60 move further apart.

[0073] Referring to Figure 6, the one-way caster 100 in this embodiment is attached below the second arm portion 82 of each leg body 83 of the second leg portion 80, and to both ends in the extension direction of the second arm portion 82.

[0074] Each unidirectional caster 100 consists of a roughly U-shaped bracket 101 fixed to the lower part of the second arm portion 82 of each leg body 83 with bolts, screws, etc. (not shown), and a wheel 103 rotatably supported at the lower ends of both side walls of the bracket 101 via a rotating shaft 102.

[0075] Furthermore, the materials used for the first mounting section 50 and the second mounting section 60, the first leg section 40, the second leg section 80, etc., which constitute the movable frame 30 described above, can be, for example, metal, plastic, or a combination of these materials.

[0076] (modified version) The shape, structure, layout, etc., of each component constituting the folding bed in the present invention, namely the fixed body, movable frame (first mounting part, second mounting part), first leg part, first rotating support part, second rotating support part, second leg part, unidirectional caster, etc., are not limited to the above-described embodiment.

[0077] For example, the fixing body may be a horizontally elongated back plate extending in the width direction of the bed, or a block-shaped structure, as long as it can support one end of the movable frame and fix the first leg.

[0078] Furthermore, the first and second mounting sections may be configured by increasing or decreasing the number of horizontal frames that make up each mounting section, or by providing diagonal frames that are installed diagonally between a pair of vertical frames, as long as they are frame-shaped on which bedding can be placed.

[0079] Furthermore, a biasing means, such as a tension coil spring, may be installed between the first mounting portion and the second mounting portion to bias the first mounting portion and the second mounting portion towards each other via the second rotation support portion.

[0080] Furthermore, in this embodiment, the first leg portion 40 is indirectly fixed to a fixing portion 24 (see Figure 2) provided on the lower end portion 21a of each side wall 21 of the fixing body 20 via a fixing device, with one end portion 41a of each first arm portion 41 extending in the extension direction. However, the first leg portion may also be directly fixed to the fixing body by welding (if both the first leg portion and the fixing body are made of metal and are weldable) or welding.

[0081] Furthermore, the second arm portion constituting each leg portion may be erected diagonally upward rather than perpendicularly to the first arm portion. In addition, the first and second arm portions of each leg portion may be connected to each other by rods, ribs, or the like to increase the rigidity, strength, and load-bearing capacity of the first and second arm portions.

[0082] Furthermore, although the first leg portion 40 and the second leg portion 80 of this embodiment have a pair of left and right leg bodies 43, 83 consisting of a first arm portion and a second arm portion, the load-bearing capacity of the first leg portion and / or second leg portion may be increased by arranging one or more additional leg bodies between the pair of leg bodies.

[0083] (Effects and Benefits) Next, the effects of the bed 10, which has the above configuration, will be explained.

[0084] When folding the movable frame 30, which is in the unfolded state as shown in Figure 2, the mounting parts 50 and 60 are grasped at predetermined locations and brought closer together via the second rotating support part 70 in the direction in which one end of the first mounting part 50 and the other end of the second mounting part 60 approach each other, as shown by arrow R1 in Figure 2. Then, the second mounting part 60 approaches the first mounting part 50, which has one end supported by the fixed body 20, by sliding on the bed mounting surface by the one-way caster 100, and the movable frame 30 moves into a roughly inverted V-shaped folded state as shown in Figure 7.

[0085] On the other hand, when unfolding the movable frame 30, which is in a folded state as shown in Figure 7, for example, a predetermined location of the second mounting section 60 is grasped, and the two mounting sections 50 and 60 are separated via the second rotating support section 70 in a direction away from one end of the first mounting section 50 and the other end of the second mounting section 60, as shown by arrow R2 in Figure 7. Then, the second mounting section 60 slides away from the first mounting section 50, which has one end supported by the fixed body 20, on the bed mounting surface by the one-way caster 100, and the movable frame 30 moves to a horizontal unfolded state as shown in Figure 2.

[0086] In this bed 10, when folding the movable frame 30 from the unfolded state or unfolding it from the folded state, one end 51a of each vertical frame 51 of the first mounting section 50 is rotatably connected to a first pivot support section 55 provided on the second arm section 42, which is a load-receiving section of the first leg section 40 separate from the fixed body 20. The second arm section 42, which forms the load-receiving section of the first leg section 40, is spaced apart from the fixed body 20 towards the second mounting section 60.

[0087] Therefore, during the folding and unfolding operations of the movable frame 30 as described above, the load F applied from one end of the first mounting section 50 is first transmitted to the second arm section 42, which is the load-receiving section of the first leg section 40, via the first rotating support section 55, and then transmitted to the fixed body 20 via the first leg section 40, or received by the second arm section 42, which is the load-receiving section.

[0088] In other words, in this bed 10, the first leg portion 40 is separate from the fixed body 20, and the second arm portion 42, which forms the load-receiving portion, is spaced apart from the fixed body 20. Therefore, the load F from the first mounting portion 50 is not transmitted directly to the fixed body 20, but is transmitted indirectly to the fixed body 20 via the first leg portion 40, which includes the load-receiving portion, or is received by the second arm portion 42, which is the load-receiving portion.

[0089] In other words, by ensuring a longer transmission path for the load F from the first mounting section 50 to the fixed body 20, the load F can be reduced (weakened), or the load F from the first mounting section 50 can be received and absorbed by the second arm section 42, which is the load receiving section. This prevents lateral swaying or wobbling of the fixed body 20 that occurs when the movable frame 30 moves. As a result, the stability of the rotational movement of the first mounting section 50 can be improved, and consequently, the stability of the movable frame 30 when folding and unfolding can be improved.

[0090] In this embodiment, as shown in Figure 2, a gap is formed between the upper surface of each first arm portion 41 of the first leg portion 40 and the lower end surface of the lower end portion 21a of each side wall 21 of the fixed body 20. Therefore, the load F is not transmitted to the fixed body 20 via the first leg portion 40, but is mainly received by the second arm portion 42, which is the load receiving portion.

[0091] Furthermore, in this embodiment, the first leg portion 40 has a pair of first arm portions 41, 41, one end of which is connected to the lower end portion 21a of the fixed body 20 and which extend toward the second mounting portion 60 side by a predetermined length, and a pair of second arm portions 42, 42 which are erected so as to intersect with the extension direction of the first arm portions 41, and the second arm portions 42 constitute the load-receiving portion.

[0092] According to the above embodiment, since the first leg portion 40 has the above configuration, the first arm portion 41 can reliably and firmly connect the first leg portion 40 to the lower end portion 21a of the fixed body 20, and the second arm portion 42, which forms the load-receiving portion, can stably rotate and support one end portion 51a of each vertical frame 51 of the first mounting portion 50.

[0093] Furthermore, since the first leg portion 40 has a relatively simple structure consisting of a first arm portion 41 and a second arm portion 42, the manufacturability of the first leg portion 40 can be improved, reducing costs, and the overall strength and rigidity of the first leg portion 40 can be increased.

[0094] Furthermore, in this embodiment, the movable frame 30 further has a second leg portion 80 connected to the other end 61b side of each vertical frame 61 of the second mounting portion 60, and a unidirectional caster 100 is attached to the second leg portion 80 that rotates only in the folding direction and the unfolding direction when the movable frame 30 moves in the folding direction from a horizontal unfolded state so that one end of the first mounting portion 50 and the other end of the second mounting portion 60 are close together, and when it moves in the unfolding direction from a substantially inverted V-shaped folded state so that one end of the first mounting portion 50 and the other end of the second mounting portion 60 are separated.

[0095] According to the above embodiment, since a unidirectional caster 100 is attached to the second leg portion 80, the second mounting portion 60 can be moved closer to or further away from the first mounting portion 50 when the movable frame 30 is moved, and the movable frame 30 can be moved smoothly with little force.

[0096] It should be noted that the present invention is not limited to the embodiments described above, and various modified embodiments are possible within the scope of the gist of the present invention, and such embodiments are also included in the scope of the present invention. [Explanation of symbols]

[0097] 1...Bedding, 10...Folding bed (bed), 20...Fixed body, 21...Side wall, 30...Movable frame, 40...First leg, 41...First arm, 42...Second arm, 43...Leg body, 50...First mounting part, 51...Vertical frame, 52, 53...Horizontal frame, 55...First rotating support part, 60...Second mounting part, 61...Vertical frame, 62, 63...Horizontal frame, 70...Second rotating support part, 78...First link, 79...Second link, 80...Second leg, 81...First arm, 82...Second arm, 83...Leg body, 90...Third rotating support part, 100...Unidirectional caster.

Claims

1. A fixing device installed at the head or foot of the bed user, The fixed body is supported at one end by a movable frame that can move between an inverted V-shaped folded state and a horizontally unfolded state, and comprises The aforementioned movable frame is A first leg portion, which is separate from the aforementioned fixing body and is installed by being directly fixed to the aforementioned fixing body or by being indirectly fixed via a fixing device, It has at least one pair of vertical frames extending in the longitudinal direction of the bed, forming a frame on which bedding is placed, and a first mounting section positioned close to the fixed body in the longitudinal direction of the bed, The bed has at least one pair of vertical frames extending in the longitudinal direction, forming a frame on which bedding is placed, and a second mounting section is located adjacent to the first mounting section on the opposite side of the bed in the longitudinal direction from the fixing body, A first rotating support portion rotatably supports one end of each vertical frame of the first mounting portion on the first leg portion, The second mounting section has a second pivotable support section that rotatably supports one end of each vertical frame of the second mounting section to the other end of the corresponding vertical frame of the first mounting section. The folding bed is characterized in that the first leg portion has a first pivot support portion provided at a position spaced apart from the fixed body toward the second mounting portion, and has a load-receiving portion that receives the load of the first mounting portion via the first pivot support portion.

2. The first leg portion is, A pair of first arm portions, one end of which is connected to the lower end of the fixed body and extending toward the second mounting portion for a predetermined length, It has a pair of second arm portions erected so as to intersect the extension direction of the first arm portion, The folding bed according to claim 1, wherein the second arm portion constitutes the load-receiving portion.

3. The movable frame further has second leg portions connected to the other end of each vertical frame of the second mounting portion, The folding bed according to claim 1 or 2, wherein the second leg portion is fitted with a unidirectional caster that rotates only in the folding direction and the unfolding direction when the movable frame moves in the folding direction from the unfolded state so that one end of the first mounting portion and the other end of the second mounting portion are close together, and when it moves in the unfolding direction so that one end of the first mounting portion and the other end of the second mounting portion are separated from each other.

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