bed

Abstract

To provide a bed that enables simple assembly and disassembly of the bed.SOLUTION: A bed can be disassembled into a plurality of parts, and is finished by combining and coupling the plurality of parts at predetermined mutual positions. The plurality of parts include a first part, a second part 5, and a third part 4. The third part is provided with a first coupling tool for coupling the first part and the second part so as not to be detached. The first coupling tool is arranged in a specific position of the third part such that, when the first part, the second part, and the third part are combined at predetermined mutual positions, the first coupling tool 48 couples the first part and the second part in a state where they are not detached naturally.SELECTED DRAWING: Figure 9

Description

[Technical field]

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

[0002] Many beds are designed to be disassembled and assembled for the convenience of transportation, storage, and loading and unloading into and from houses and buildings. In particular, nursing beds used in hospitals and nursing care facilities are structurally complex, expensive, and have a short period of use compared to normal beds, and are therefore often rented to end users. Rental companies of nursing beds usually frequently disassemble and assemble nursing beds. In conventional nursing beds, a large number of fasteners, such as connecting pins or fastening bolts, are used to connect and fasten parts to each other.

[0003] As an example, Non-Patent Document 1 describes a connection structure of a frame of a conventional nursing bed. According to the description, the frame supports the bottom that receives the body of the care recipient, and is configured by connecting multiple parts (subframes). Specifically, the frame is configured such that four subframes, namely, a base frame, a center frame, a head frame, and a foot frame, are connected and fixed to each other.

[0004] When assembling a bed, the base frame and center frame are connected, and then the head frame and foot frame are connected to the center frame and fixed in place. At this time, separate parts, pins and split pins to prevent the pins from falling out, are used to secure the multiple connected sub-frames together.

[0005] In addition to the frame (connected part) exemplified above, a bed has many other parts (connected parts) that need to be connected and fixed to one another, and fasteners such as fastening bolts and connecting pins are used at each location. These fasteners are individual parts that are separate from the parts that are to be connected to one another, such as each subframe. Before assembling the bed, workers need to prepare the correct fasteners in the correct number. After disassembling the bed, workers need to store the fasteners so as not to lose them. [Prior art documents] [Non-patent literature]

[0006] [Non-Patent Document 1] User's Manual "Low Bed Nursing Bed Rafio" Platz Co., Ltd. (Created in April 2018) <URL https: / / www.platz-ltd.co.jp / support / manual / torisetsu / rafio / rafio_201804_np0120-e.pdf> Summary of the Invention [Problem to be solved by the invention]

[0007] However, if the fasteners are used as separate parts from the connected parts such as the frame, the work of the worker becomes complicated, and it takes time to assemble and disassemble the bed. There is also a possibility that the fasteners may be lost during the work. There is also a risk that the worker may attach the fasteners to the wrong place or forget to attach a certain part. In such a case, the bed may become loose or the fasteners may fall off the connected parts, making it impossible to assemble the bed safely.

[0008] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a bed that allows easy assembly and disassembly. [Means for solving the problem]

[0009] A bed according to one embodiment can be disassembled into multiple parts, and is completed by assembling and connecting the multiple parts at a predetermined relative position. The multiple parts include a first part, a second part, and a third part. A first connector for connecting the first part and the second part so that they do not come apart is provided on the third part. The first connector is arranged at a specific position of the third part so that when the first part, the second part, and the third part are assembled at the predetermined relative position, the first connector automatically connects the first part and the second part in a state in which they do not come apart.

[0010] In this bed, since the first fastener is provided on the third component, it is possible to prevent the first fastener from being lost and to prevent the first fastener from being forgotten to be attached.

[0011] The worker does not need to prepare a separate fastener to prevent the first part from coming apart from the second part, which reduces the number of parts in the bed.

[0012] Furthermore, with this bed, simply by combining the first, second and third parts in their respective predetermined positions, the first fastener automatically connects the first and second parts so that they do not come apart. This reduces the number of steps required for assembling the bed 1. Workers are spared the stress of losing fasteners, and forgetting to attach fasteners can be prevented. This reduces the number of steps required, improving work efficiency.

[0013] Furthermore, when disassembling the bed 1, the labor required can be reduced, and when storing the bed in a disassembled state, loss of the fasteners can be prevented.

[0014] According to one embodiment, the first and second parts are assembled at a predetermined relative position by engaging a first engagement portion provided on the first part with a second engagement portion provided on the second part. Therefore, the specific position of the third part may be a position that prevents the first engagement portion from disengaging from the second engagement portion, that is, a position that maintains the engagement of both engagement portions.

[0015] According to one embodiment, the second engagement portion is capable of receiving the first engagement portion and has an opening for inserting said first engagement portion. The first coupling has a means for closing the opening of the second engagement portion. In this way, the first coupling can be simplified in shape since it only closes the opening of the second engagement portion.

[0016] The multiple parts include multiple subframes that make up the bed frame. Many nursing beds have frames that are made up of multiple subframes interconnected so that they can be assembled and disassembled. In particular, nursing beds that involve up-down movement and rotation have complex frame connection structures. For this reason, many fasteners are used to connect the frames. Therefore, by providing the fasteners to the frame rather than as separate components, assembly work can be made less complicated.

[0017] According to one embodiment, the first part is a base frame that raises and lowers the bed, the second part is a center frame supported by the base frame, and the third part is at least one of a head frame and a foot frame that is connected to the center frame. By making the third part a head frame or a foot frame, the first coupling tool can be provided in an appropriate state and at an appropriate position according to the order of the worker's work. The third part may be a head frame.

[0018] According to one embodiment, the first engagement portion is an abutment portion provided on the base frame to abut against the center frame to raise and lower the bed. The second engagement portion is a holding portion having an opening that receives and holds the abutment portion. The first coupling is provided on the head frame to block a part or all of the opening so that the abutment portion does not come off the holding portion when the center frame and the head frame are combined in a predetermined relative position.

[0019] For example, the shaft holder is opened toward the center of the bed in the longitudinal direction. The first fastener may be a pin-shaped member that is provided at a specific position of the head frame or the foot frame and faces downward. When the center frame and the head frame are combined at a predetermined relative position, the pin-shaped member may be inserted into a hole provided at the rear end of the shaft holder.

[0020] For example, the holding portion has an opening and an opening / closing portion that opens and closes the opening. The first coupling may have a pressing member for pressing the opening / closing portion. When the center frame and the head frame are combined in a predetermined relative position, the opening / closing portion may be pressed by the pressing member to close the opening.

[0021] According to one embodiment, the third part or the second part may further include a second coupling for maintaining the position of the first coupling at a position where the first part and the second part are coupled together so as not to come apart, i.e., the coupled state of the first to third parts can be maintained at a predetermined relative position.

[0022] According to one embodiment, the second coupling may be configured to secure the third component and the second component to one another.

[0023] According to one embodiment, the multiple components may include a base frame and one or more legs that are easily connectable and detachable from the base frame.

[0024] According to one embodiment, the multiple components may include multiple bottoms and a frame supporting the multiple bottoms. The frame may have a first bottom drive mechanism for moving a first bottom of the multiple bottoms, and the frame or at least one bottom of the multiple bottoms may have a second bottom interlocking link for interlocking a second bottom of the multiple bottoms with the first bottom, and the first bottom drive mechanism and the second bottom interlocking link may be configured to be coupled and separated in a one-touch manner.

[0025] According to one embodiment, the multiple parts include a first part and a second part, the first part having a first engagement portion, and the second part having a second engagement portion engageable with the first engagement portion. A fastener for connecting the first part and the second part so as not to be separated is provided on the second part, and when the first part and the second part are combined in a predetermined relative position, the first engagement portion and the second engagement portion are engaged with each other, and the fastener naturally holds the first engagement portion and the second engagement portion in an engaged state.

[0026] According to one embodiment, the multiple parts include multiple subframes constituting a bed frame, the first part is a base frame that is a base of the multiple subframes, and the second part is a center frame supported by the base frame. The first engagement part is an abutment part provided on the base frame to abut against the center frame, the second engagement part is a holding part having an opening that receives and holds the abutment part, the fastener is attached to the center frame in a state in which the opening is closed and in a state in which the opening can be opened and closed, and when the abutment part and the holding part are combined in a predetermined relative position, the abutment part naturally presses the fastener, the opening is released from the closed state and inserted into the holding part, and when the abutment part is received in the holding part, the fastener closes the opening.

[0027] According to one embodiment, the fastener has an elastic body, and the fastener keeps the opening closed by the elastic body, and when the fastener is pressed against the abutment portion, it releases the closed state of the opening against the elastic force of the elastic body, and the abutment portion is accommodated in the retaining portion.

[0028] According to one embodiment, the fastener keeps the opening closed by its own weight, and when the fastener is pressed against the abutment portion, it releases the opening from its closed state, and when the abutment portion is accommodated in the retaining portion, the opening is closed by its own weight.

[0029] According to one embodiment, the multiple components include multiple subframes constituting a bed frame. A first subframe, which is one or more of the multiple subframes, has a first electric device and a movable mechanism driven by the first electric device. A second subframe, which is a subframe other than the first subframe among the multiple subframes, has a second electric device that is electrically connectable to the first electric device and drives the movable mechanism. A first electric wire is connected to the first electric device, and a second electric wire is connected to the second electric device. At least one point of the first electric wire is fixed to the first subframe, and at least one point of the second electric wire is fixed to the second subframe. When the first subframe and the second subframe are assembled, a first connector provided at an end of the first electric wire and a second connector provided at an end of the second electric wire are located in close proximity to each other so as to be connectable to each other, and are arranged such that even if the movable mechanism is moved with the first connector and the second connector connected, the first electric wire and the second electric wire are not broken. Effect of the Invention

[0030] The present invention can provide a bed that allows for easy assembly and disassembly of the bed. [Brief description of the drawings]

[0031] [Figure 1] Schematic diagram of a bed according to a first embodiment. [Diagram 2] Exploded view of the bed in Figure 1 [Diagram 3] Diagram explaining the assembly of the base frame and center frame [Figure 4] Diagram showing the connection state between the base frame and the rear of the center frame [Diagram 5] Diagram showing the connection state between the base frame and the front part of the center frame [Figure 6] Diagram explaining assembly of center frame and head frame [Figure 7] Fig. 1 explains how to attach the inter-frame engagement part and the first coupling [Figure 8]Fig. 2 explains how to attach the inter-frame engagement part and the first coupling. [Figure 9] Fig. 3 explains how to attach the inter-frame engagement part and the first coupling. [Figure 10] Diagram explaining the installation of the second coupling (1) [Figure 11] Diagram explaining the installation of the second coupling (2) [Figure 12] FIG. 13 is a diagram showing a first modified example of the inter-frame engagement portion and the first coupling device. [Figure 13] FIG. 13 is a diagram showing a second modified example of the inter-frame engagement portion and the first coupling device. [Figure 14] FIG. 13 is a diagram showing a third modified example of the inter-frame engagement portion and the first coupling device. [Figure 15] Diagram explaining the legs [Figure 16] Diagram explaining the installation of the link mechanism [Figure 17] FIG. 11 is a diagram showing the base frame and center frame of a bed according to a second embodiment in disassembled form. [Figure 18] Diagram explaining the assembly of the base frame and center frame [Figure 19] Diagram showing inter-frame engagement parts and fasteners (1) [Figure 20] Diagram showing inter-frame engagement parts and fasteners (2) [Figure 21] Figure showing inter-frame engagement parts and fasteners (3) [Figure 22] A diagram illustrating an inter-frame engagement portion and a fastener. [Figure 23] Fig. 1 shows a modified example of the inter-frame engagement portion and fastener [Figure 24] Fig. 2 shows a modified example of the inter-frame engagement portion and fastener [Diagram 25] Fig. 3 shows a modified example of the inter-frame engagement portion and fastener [Figure 26] Schematic diagram of a bed according to a third embodiment. [Figure 27] Exploded view of the bed in Figure 1 [Figure 28] FIG. [Figure 29]4A and 4B are explanatory diagrams of the control unit, in which FIG. 4A shows a state in which the cover is open, and FIG. 4B shows a state in which the cover is closed. [Diagram 30] 4A and 4B are perspective views of electric wires in a state where the motor electric wires and the relay electric wires are not connected, and FIG. 4B shows a state where the motor electric wires and the relay electric wires are connected. [Diagram 31] FIG. 13 is an explanatory diagram of a wiring path of an electric wire according to a modified example. [Diagram 32] 10A and 10B are perspective views of a first motor electric wire according to a modified example, in which (a) shows a state in which a cover part is open, and (b) shows a state in which the cover part is closed. [Diagram 33] 13 is an explanatory diagram of a second relay wire according to a modified example. FIG. [Diagram 34] 13 is an explanatory diagram of a second relay wire according to a modified example. FIG. [Diagram 35] FIG. 13 is an explanatory diagram of an electric wire according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] Hereinafter, one embodiment of the present invention (first embodiment) will be described with reference to the drawings.

[0033] As shown in Figures 1 and 2, a bed 1 according to one embodiment is a nursing bed used, for example, in a hospital or nursing care facility. The bed 1 is formed in a generally rectangular shape that is elongated in a vertical direction in a plan view in order to support the body of a recumbent person. In this specification, the longitudinal direction of the bed 1 is defined as the front-rear direction, the head side of the bed 1 is defined as the front side (H), and the foot side is defined as the rear side (F). The direction opposite to the front-rear direction of the bed 1 is defined as the left-right direction.

[0034] The bed 1 mainly comprises a bottom 3 which can be separated and connected to each other, a frame, and a board 8 which is arranged at the front and rear ends of the bed 1.

[0035] The bottom 3 supports from below a bed mat (not shown) on which a recumbent person lies. The bottom 3 has a plurality of elements, for example, a back bottom 31, a waist bottom 32, and a knee-leg bottom 33. These elements of the bottom 3 are connected in the front-to-rear direction in the order of the back bottom 31, the waist bottom 32, and the knee-leg bottom 33. The angles of the back bottom 31 and the knee-leg bottom 33 relative to the waist bottom 32 of the bottom 3 are variable. In other words, the bottom 3 is bendable. The bottom 3 may be made of, for example, steel or synthetic resin.

[0036] The back bottom 31 has multiple elements such as a high-back bottom 31A and a low-back bottom 31B. For example, the back bottom 31 has these elements interconnected in the order of the high-back bottom 31A and the low-back bottom 31B from the front in the front-rear direction, and the angle can be changed around a connecting part 31c connecting these elements 31A and 31B as the axis center. The back bottom 31 may be a single plate-like member that is not divided into multiple elements to change the angle.

[0037] The knee-leg bottom 33 has multiple elements such as an upper leg bottom 33A and a lower leg bottom 33B. For example, the knee-leg bottom 33 is connected to each other in the front-rear direction in the order of the upper leg bottom 33A and the lower leg bottom 33B from the front, and the angle can be changed around the axis of the connecting part 33c connecting these elements 33A and 33B. The knee-leg bottom 33 may be a single plate-like one that is not divided into multiple elements to change the angle.

[0038] In addition, a foot bottom (not shown) for placing feet on may be connected to the rear end of the knee-leg bottom 33 of the bottom 3, for example.

[0039] The frame has a generally vertically long rectangular shape in a plan view, and supports the bottom 3 from below. The frame includes, for example, a base frame 7 and a main frame 2 that can be separated and connected to each other. The main frame 2 includes, for example, a head frame 4, a center frame 5, and a foot frame 6 that can be disassembled and connected to each other. When disassembled for transportation or the like, the bed 1 is disassembled into a number of main components, including the base frame 7, the head frame 4, the center frame 5, the foot frame 6, the back bottom 31, the waist bottom 32, and the knee-leg bottom 33. When assembling the bed 1, the main components 7, 4, 5, 6, 31, 32, and 33 are combined and connected to each other at predetermined positions to complete the bed 1.

[0040] <Base frame 7> The base frame 7 is a frame that serves as a foundation for the bed 1. The base frame 7 has a vertically elongated, generally rectangular shape in a plan view, and supports the main frame 2 from below.

[0041] The base frame 7 includes a base portion 71 that is placed on a floor (installation surface), and an X-link mechanism 72 that serves as a lifting mechanism (moving mechanism).

[0042] The base 71 includes a pair of BF (base frame) vertical members 710 extending in the front-rear direction, and a pair of BF horizontal members 716 extending in the left-right direction. Specifically, the base 71 is configured as a substantial frame body, with a pair of BF horizontal members 716 installed in the left-right direction between the pair of BF vertical members 710 arranged with a gap between them on the left and right.

[0043] A guide member 718 is provided on the inner side of each of the pair of BF vertical members 710 at the rear thereof. The guide member 718 fixes the X link mechanism 72 to be slidable in the front-rear direction relative to the base 71. For example, the guide member 718 has a shape that can accommodate a rear end (guide end 730) of a first link 721 (described later) to be slidable in the front-rear direction.

[0044] A leg portion 712 extends from each of the front and rear ends of the pair of vertical members 710. A fixed leg 714 may be connected to the leg portion 712.

[0045] The lower part of the X-link mechanism 72 is connected to the base 71, and the upper part is connected to the main frame 2. The X-link mechanism 72 is equipped with an actuator 117, and enables the main frame 2 to move up and down. Note that in this explanation, detailed explanation of the movement of each element powered by the actuator 117 will be omitted.

[0046] The X-link mechanism 72 mainly includes a pair of a first link 721 and a second link 723, and a plurality of connecting rods 727, 728. The first link 721 and the second link 723 each extend in the front-rear direction, and are rotatably connected to each other at approximately the center in the front-rear direction via a link fixing portion 725. That is, each set of the first link 721 and the second link 723 is connected to each other in an X-shape in a side view, with the link fixing portion 725 as the axis center. A pair of sets of the first link 721 and the second link 723 is provided with a gap therebetween in the left-right direction.

[0047] The connecting rod 727 connects the front ends and rear ends of the pair of first links 721. Specifically, the front ends of the pair of first links 721 are connected by connecting rod 727H, and the rear ends of the pair of first links 721 are connected by connecting rod 727F. The connecting rod 728 connects the front ends and rear ends of the pair of second links 723. Specifically, the front ends of the pair of second links 723 are connected by connecting rod 728H, and the rear ends of the pair of second links 723 are connected by connecting rod 728F.

[0048] The rear end of the first link 721 is connected to the BF vertical member 710 so as to be slidable and rotatable in the front-rear direction. The connecting rod 727F extends outward in the left-right direction of the pair of first links 721, and roller-shaped guide ends 730 are rotatably attached to the left and right ends of the connecting rod 727F on the outer side of the concentric circle of the connecting rod 727F. The guide ends 730 are housed in the guide members 718 of the BF vertical member 710 so as to be slidable in the front-rear direction. Therefore, the rear end of the first link 721 can move in the front-rear direction along the base frame 7. In addition, the first link 721 can rotate relative to the BF vertical member 710 around the connecting rod 727F as the axis center.

[0049] The rear end of the second link 723 is connected to the CF (center frame) vertical member 51 so as to be slidable and rotatable in the front-rear direction. The connecting rod 728F extends outward in the left-right direction of the pair of second links 723, and roller-shaped guide ends 729 are rotatably attached to the left and right ends of the connecting rod 728F on the outside of the connecting rod 727F on a concentric circle. The guide ends 729 are housed in the guide members 52 of the CF vertical member 51, which will be described later, so as to be slidable in the front-rear direction. Therefore, the rear end of the second link 723 is movable in the front-rear direction along the center frame 5. In addition, the second link 723 is rotatable relative to the CF vertical member 51 around the connecting rod 728F as the axis center.

[0050] The front side of the second link 723 is rotatably connected to the front of the base frame 7. For example, the connecting rod 728H is rotatably attached to the BF vertical member 710. In the illustrated example, the function of the connecting rod 728H connecting the front ends of the second links 723 is substituted by the BF horizontal member 716 (non-rotating) on ​​the front side of the base frame 7, so the BF horizontal member 716 and the front end of the second link 723 are connected via a connecting member that enables this rotation.

[0051] The front side of the first link 721 is rotatably connected to the front of the center frame 5. For example, the connecting rod 727H is rotatably attached to the CF vertical member 51. In the illustrated example, plate-shaped connection parts P are fixed to the left and right outer sides of the connecting rod 727H, and the rotating shaft parts 100 are rotatably provided at the connection parts P. The rotating shaft parts 100 are, for example, cylindrical rollers. Note that the rotating shaft parts 100 may be formed by extending the connecting rods 727H outward in the left-right direction of each of the first links 721.

[0052] The pivot shaft portion 100 constitutes a first engagement portion. The first engagement portion is a part of an inter-frame engagement portion that engages a plurality of frames. In this embodiment, for example, the inter-frame engagement portion engages the base frame 7 and the center frame 5. The inter-frame engagement portion will be described later.

[0053] In the X link mechanism 72, for example, when the first link 721 is rotated upward, the second link 723 also rotates upward in conjunction with the first link 721. At this time, the guide end 729 of the first link 721 moves forward (H side) while being guided by the guide member 718, and the guide end 730 of the second link moves forward (H side) while being guided by the guide member 52. As a result, the first link and the second link rotate and stand up, and the main frame rises relative to the base frame 7.

[0054] <Mainframe 2> The main frame 2 has a generally vertically elongated rectangular shape in a plan view. The main frame 2 supports the bottom 3 from below. The main frame 2 includes an actuator 122 that serves as the power for moving the frame elements 4 to 6 and the elements 31 to 33 of the bottom 3. Note that in this explanation, detailed explanations of the movements of each element powered by the actuator 122 will be omitted.

[0055] Furthermore, the main frame 2 is connected to a base frame 7, which allows the bottom 3 to move up and down.

[0056] The main frame 2 has a plurality of elements 4 to 6, such as a head frame 4, a center frame 5, and a foot frame 6, and the elements 4 to 6 are connected to each other.

[0057] In the illustrated example, a base frame 7, a head frame 4, and a foot frame 6 are each connected to a center frame 5. The main frame 2 may be made of, for example, steel or synthetic resin.

[0058] <Center frame 5> The center frame 5 is a frame that supports the waist bottom 32 from below. The head frame 4 is connected to the front of the center frame 5, and the foot frame 6 is connected to the rear of the center frame 5. The center frame 5 is connected to an X-link mechanism 72 of the base frame 7, and is movable up and down.

[0059] The center frame 5 includes a pair of CF (center frame) vertical members 51 extending in the front-rear direction, and a pair of CF horizontal members 59 extending in the left-right direction. Specifically, the center frame 5 is configured as a substantial frame body, with a pair of CF horizontal members 59 installed in the left-right direction between the pair of CF vertical members 51 arranged with a gap between them on the left and right. In the illustrated example, two CF horizontal members 59 are installed at the center and rear of the pair of CF vertical members 51 in the front-rear direction.

[0060] A guide member 52 is provided on the inner side of each of the pair of left and right CF vertical members 51 at the rear thereof. The guide member 52 slidably connects the upper rear portion of the X link mechanism 72 to the CF vertical member 51. For example, the guide end 729 at the rear end of the second link 723 is housed in the guide member 52 so as to be slidable in the front-rear direction.

[0061] As described above, the front end of the first link 721 of the X link mechanism 72 is attached to the front of the center frame 5. Specifically, the front end of each of the first links 721 is rotatably attached to the front of the left and right CF vertical members 51.

[0062] In the illustrated example, a shaft holding portion 53 serving as a second engagement portion is provided on the inner front side of each of the CF vertical members 51. The shaft holding portion 53 is formed with an opening 53a facing downward. The rotating shaft portion 100 is engaged through the opening 53a.

[0063] The second engagement portion is a part of the inter-frame engagement portion. The inter-frame engagement portion has a first engagement portion and a second engagement portion. In this embodiment, the first engagement portion is the rotating shaft portion 100 of (has) the base frame 7, and the second engagement portion is the shaft holding portion 53 of (has) the center frame 5. When assembling the frame, the center frame 5 is attached onto the base frame 7. At this time, the opening of the shaft holding portion 53 is attached so as to cover the rotating shaft portion 100 of the base frame 7 from above, and an engaged state is achieved in which the first engagement portion is inserted inside the second engagement portion.

[0064] However, since the second engagement portion has an opening on the lower side, there is a possibility that the first engagement portion may come off. In order to fix the engagement state of the inter-frame engagement portion, in the conventional technology, a pin that closes the opening of the second engagement portion in this engagement state and a split pin that prevents the pin from coming off the opening of the second engagement portion are attached. The pin has a shape that extends in the front-rear direction and is inserted into insertion holes formed in the front and rear ends of the lower part of the second engagement portion to close the opening. One end of the pin is formed with a diameter larger than the insertion hole, and the other end is fixed to the opening by fastening it with a split pin that is longer than the diameter of the insertion hole.

[0065] In this way, after the first engagement portion is engaged with the second engagement portion, the pin is fixed in the opening, thereby fixing the engaged state of the inter-frame engagement portion.

[0066] However, in the above-mentioned conventional technology, multiple connecting members, namely pins and split pins, were required to fix the engagement state of one inter-frame engagement part. This made assembly complicated. In addition, the number of parts was increased, and there were many problems such as the loss of the connecting members.

[0067] In this embodiment, the inter-frame engagement portion is fixed in its engaged state by a first fastener, which will be described later.

[0068] <Parts for mounting frame elements> For example, as shown in FIG. 3, the center frame 5 is formed with several portions for mounting other frame elements 4, 6 constituting the main frame 2.

[0069] Each CF vertical member 51 of the center frame 5 has a plurality of CF protrusions 57, 56 protruding outward on its outer surface. The CF front protrusion 57 is a protrusion for attaching the head frame 4 to the center frame 5. The CF front protrusion 57 is provided, for example, forward of the center of the CF vertical member 51. The CF rear protrusion 56 is a protrusion for attaching the foot frame 6 to the center frame 5. The CF rear protrusion 56 is provided rearward of the center of the CF vertical member 51.

[0070] Each CF vertical member 51 has CF holes 58H, 58F formed at the front and rear, respectively, penetrating in the left-right direction. The CF hole 58H is formed to fix the head frame 4 to the center frame 5. The CF hole 58H is formed with a female thread, for example, for screwing in a knob bolt 90, which will be described later. The CF hole 58F is formed to fix the foot frame 6 to the center frame 5. The CF hole 58F is formed with a female thread, for example, for screwing in a knob bolt 91, which will be described later.

[0071] <Head frame 4> The head frame 4 is a frame that supports from below the back bottom 31. A headboard 8H is attached to the front end of the head frame 4.

[0072] 2, 6, etc., the head frame 4 includes a pair of HF (head frame) vertical members 41 extending in the front-rear direction and a pair of HF horizontal members 49 extending in the left-right direction. Specifically, the head frame 4 is configured as a substantial frame body with a pair of HF horizontal members 49 stretched in the left-right direction between the pair of HF vertical members 41 arranged with a gap between them. In the illustrated example, two HF horizontal members 49 are stretched in front and behind the pair of HF vertical members 41 in the front-rear direction.

[0073] The rear of the head frame 4 is connected to the center frame 5. For example, the two frames 4, 5 are connected and fixed together with each other such that the HF vertical members 41 and the CF vertical members 51 are overlapped on the left and right sides so as to overlap in a side view.

[0074] An HF engagement part 42 is formed at the rear end of each HF vertical member 41. The HF engagement part 42 is formed in a concave shape that opens toward the rear, and engages with the CF front protrusion 57 on the outer surface of the CF vertical member 51 in a pinching manner. The HF engagement part 42 can determine the attachment position of the HF vertical member 41 to the CF vertical member 51 in the front-rear direction.

[0075] Each HF vertical member 41 includes an alignment member 46. For example, as shown in Fig. 8, the alignment member 46 has a first wall 46a that is horizontal to the upper surface of the HF vertical member 41 and a second wall 46b that is substantially vertical to the upper surface of the HF vertical member 41, and is formed into an inverted L shape by these walls.

[0076] The alignment member 46 has a first wall 46a fixed to the upper surface of the HF vertical member 41 and extending further inward than the CF vertical member 51, thereby allowing the upper surfaces of the HF vertical member 41 and the CF vertical member 51 to be installed at the same height.

[0077] Furthermore, between the second wall 46b of the positioning member 46 and the inner surface of the HF vertical member 41, a gap of a predetermined width suitable for inserting and fixing the CF vertical member 51 is formed.

[0078] 10, for example, an HF hole 43 penetrating in the left-right direction is formed in each HF vertical member 41. The HF hole 43 is formed at a position communicating with the CF hole 58H when the HF vertical member 41 and the CF vertical member 51 are overlapped.

[0079] The HF vertical member 41 may have a knob bolt 90 attached to the HF hole 43. The knob bolt 90 may be inserted into the HF hole 43 from the outside of the HF vertical member 41, and may be temporarily fixed by providing a ring or the like on the inside of the HF vertical member 41. As another temporary fixing method, for example, the diameter of the tip of the knob bolt 90 may be slightly larger than the diameter of the HF hole 43 and the base end of the knob bolt 90 placed inside the HF hole 43 may be formed slightly smaller than the diameter of the HF hole 43 in advance at room temperature, and the thermal expansion characteristics of the HF vertical member 41 and the knob bolt 90 may be utilized to temporarily make the tip of the knob bolt 90 smaller than the HF hole 43 and pass the tip of the knob bolt 90 through the HF hole 43.

[0080] The knob bolt 90 is formed, for example, in a male thread shape, and is inserted into a communication hole that communicates between the HF hole 43 and the CF hole 58H, and is screwed into the CF hole 58. The knob bolt 90 may be a separate part.

[0081] For example, as shown in Fig. 6, each HF vertical member 41 is provided with a pin-shaped member 48 as a first coupling. In the illustrated example, the pin-shaped member 48 is provided in a state of being fixed to a fixing portion 44 formed on the inside of the HF vertical member 41. The first coupling will be described in detail later.

[0082] In the head frame 4, for example, each HF vertical member 41 may be provided with an option mounting portion 47 to which a fence or the like can be attached to prevent a recumbent person from falling.

[0083] <Foot Frame 6> The foot frame 6 is a frame that supports from below the knee-leg bottom 33. The rear end of the foot frame 6 is attached to a footboard 8F.

[0084] For example, as shown in Fig. 2 etc., the foot frame 6 includes a pair of FF (foot frame) vertical members 61 extending in the front-rear direction and a pair of CF horizontal members 59 extending in the left-right direction. Specifically, the foot frame 6 is configured as a substantial frame body by installing a pair of FF horizontal members 69 in the left-right direction between the pair of FF vertical members 61 arranged with a gap between them. In the illustrated example, two FF horizontal members 69 are installed at approximately the center and rear of the pair of FF vertical members 61 in the front-rear direction.

[0085] The front of the foot frame 6 is connected to the center frame 5. For example, the two frames 6, 5 are connected and fixed by overlapping the left and right FF vertical members 61 and the left and right CF vertical members 51 side by side (so that they overlap in a side view).

[0086] Each FF vertical member 61 has a front end formed with a FF engagement portion 62. The FF engagement portion 62 has a concave tip that opens forward and engages with the CF rear protrusion 56 formed on the outside of the CF vertical member 51 in a pinching manner. The FF engagement portion 62 can determine the attachment position of the FF vertical member 61 relative to the CF vertical member 51 in the front-rear direction.

[0087] FF holes 63 penetrating in the left-right direction are formed in each FF vertical member 61. The FF holes 63 are formed at positions communicating with the CF holes 58F when the FF vertical member 61 and the CF vertical member 51 are overlapped.

[0088] The knob bolt 91 may be attached to the FF hole 63 of the FF vertical member 61. The knob bolt 91 may be inserted into the FF hole 63 from the outside of the FF vertical member 61, and may be temporarily fixed by providing a ring or the like on the inside of the FF vertical member 61. As another temporary fixing method, for example, the diameter of the tip of the knob bolt 91 may be slightly larger than the diameter of the FF hole 63 and the base end of the knob bolt 91 placed inside the FF hole 63 may be formed slightly smaller than the diameter of the FF hole 63 in advance at room temperature, and the thermal expansion characteristics of the FF vertical member 61 and the knob bolt 91 may be utilized to temporarily make the tip of the knob bolt 91 smaller than the FF hole 63 and pass the tip of the knob bolt 91 through the FF hole 63.

[0089] The knob bolt 91 is formed, for example, in a male thread shape, and is inserted into a communication hole that communicates between the FF hole 63 and the CF hole 58F, and is screwed into the CF hole 58F. Note that the knob bolt 91 may be a separate component.

[0090] The foot frame 6 may be provided with an option mounting portion 67, for example, on each FF vertical member 61, to which a fence or the like can be attached to prevent a reclining person from falling.

[0091] <Combining multiple parts> 7 to 9, the joining of the multiple parts of the disassembly bed 1 will be described below. In this embodiment, the first part corresponds to the base frame 7, the second part corresponds to the center frame 5, and the third part corresponds to the head frame 4. The inter-frame engagement part is fixed in its engaged state by a first fastener.

[0092] As described above, the inter-frame engagement portion according to this embodiment is composed of the first engagement portion and the second engagement portion.

[0093] The first engagement portion is formed in a convex shape on the outer side of the front end portion of the base frame 7. Specifically, the first engagement portion is the rotation shaft portion 100 at the front end of the first link 721, for example.

[0094] The second engagement portion is formed so as to open downward on the inside of the front end portion of the center frame 5. Specifically, the second engagement portion is the shaft holding portion 53 of the center frame 5, for example.

[0095] The shaft holding portion 53 has a semicircular upper portion 54 and two lower portions 55 each extending downward from the lower end of the upper portion 54. As a result, an opening 53a is formed at the lower end of the shaft holding portion 53. The lower portions 55 are formed with insertion holes 55a, 55a through which the pin-shaped member 48 is inserted in the front-rear direction. The insertion holes 55a, 55a are formed to penetrate the bed 1 in the longitudinal direction.

[0096] When assembling the frame, the center frame 5 is connected onto the base frame 7. At this time, the rotating shaft 100 is inserted into the shaft holding part 53 through the opening 53a. The rotating shaft 100 is accommodated inside the shaft holding part 53 (so that the rotating shaft 100 abuts against the inner surface of the upper part 54 due to the weight of the center frame 5). This brings the rotating shaft 100 and the shaft holding part 53 into an engaged state.

[0097] In this engaged state, the center frame 5 is assembled in a predetermined relative position with respect to the base frame 7. However, in this state, there is a possibility that the rotating shaft portion 100 may come off from the shaft holding portion 53 through the opening 53a.

[0098] The first coupling fixes the engaged state of the inter-link coupling portion so that the first coupling portion does not come off from the second coupling portion. The first coupling corresponds to a pin-shaped member 48.

[0099] The pin-shaped member 48 is provided at a specific position of the head frame 4. For example, the pin-shaped member 48 is provided at a specific position of the HF vertical member 41. In the illustrated example, the pin-shaped member 48 is provided at the fixing portion 44 on the inner side of the HF vertical member 41. Here, the specific position is a position where the pin-shaped member 48 is inserted into the insertion hole 55a and closes the opening 53a so that the rotating shaft portion 100 does not come off from the shaft holding portion 53 when the bed 1 (at least the three frames of the base frame 7, the center frame 5, and the head frame 4) is assembled.

[0100] The pin-shaped member 48 is a rod-shaped member extending in the front-rear direction of the bed 1, with its base fixed to the rear surface 44a of the fixed portion 44 and its tip 48a extending rearward.

[0101] When the rotating shaft portion 100 is accommodated in the shaft holding portion 53 (i.e., when the rotating shaft portion 100 is engaged with the shaft holding portion 53), the pin-shaped member 48 is inserted into the front and rear insertion holes 55a of the shaft holding portion 53, thereby blocking the opening 53a.

[0102] When assembling the frame, the head frame 4 is connected to the center frame 5 from the front to the rear. At this time, the pin-shaped members 48 of the head frame 4 pass through the front and rear insertion holes 55a of the shaft holding portion 53.

[0103] When the head frame 4 is assembled to the center frame 5 at a predetermined relative position, the pin-shaped member 48 passes through the insertion holes 55a, 55a. For example, as shown in Fig. 8, the assembly is completed when the tip 48a of the pin-shaped member 48 protrudes from the rear end of the insertion hole 55a.

[0104] This makes it possible to prevent the rotating shaft portion 100 from coming off the shaft holding portion 53. In other words, it is possible to prevent the base frame 7 from coming off the center frame 5. And, the combined and connected state of the frame elements of the bed 1 (the three frames, the base frame 7, the center frame 5, and the head frame 4) is maintained.

[0105] Furthermore, a knob bolt 90 as a second fastener passes through the HF hole 43 of the HF vertical member 41 and is screwed into the CF hole 58 of the CF vertical member 51. As a result, the HF vertical member 41 and the CF vertical member 51 are overlapped and fixed.

[0106] Therefore, in this state, the frame elements of the bed 1 (the three frames: the base frame 7, the center frame 5 and the head frame 4) are fixed in their mutual positions after assembly.

[0107] <How to assemble the frame> Next, the assembly work of the bed 1 according to this embodiment will be described.

[0108] (1) The worker connects the center frame 5 to the base frame 7. Specifically, the worker accommodates the guide ends 729 at the rear ends of the second links 723 in the guide members 52 of the CF vertical members 51, and engages the pivot shaft portions 100 at the front ends of the first links 721 with the shaft holders 53 of the CF vertical members 51.

[0109] (2) Next, the worker connects the head frame 4 to the center frame 5 of (1). Specifically, the worker engages the HF engagement parts 42 of each HF vertical member 41 with the CF front protrusions 57 of each CF vertical member 51, and overlaps each HF vertical member 41 with each CF vertical member 51 using each alignment member 46. From this state, the worker slides the head frame 4 backward relative to the center frame 5, and inserts the pin-shaped members 48 of each HF vertical member 41 into the insertion holes 55a of the shaft holding parts 53 of each CF vertical member 51.

[0110] (3) The worker aligns the center frame 5 and the head frame 4 with each other at a predetermined position, thereby communicating the HF holes 43 of each HF vertical member 41 with the CF holes 58 of each CF vertical member 51, and screws the knob bolts 90 into these holes. This fixes the head frame 4 to the center frame 5. At the same time, the pin-shaped members 48 cannot come out of the insertion holes 55a of the shaft holding parts 53, so that the base frame 7 and the center frame 5 are joined together so as not to be separated.

[0111] (4) Next, the worker connects the foot frame 6 to the center frame 5 of (2). Specifically, the worker engages the FF engagement parts 62 of each FF vertical member 61 with the CF rear projections 56 of each CF vertical member 51, and overlaps each FF vertical member 61 with each CF vertical member 51. The worker aligns the relative positions of the center frame 5 and the foot frame 6 to predetermined positions, thereby communicating the HF holes 43 of each FF vertical member 61 with the CF holes 58F of each CF vertical member 51, and screws the knob bolts 91 into these holes, respectively. This fixes the foot frame 6 to the center frame 5.

[0112] The worker attaches the bottom 3 and the board 8 to the assembled frame.

[0113] Therefore, by simply performing the normal assembly work of the frame elements, the bed 1 can prevent the rotation shaft portion 100 from coming off the shaft holding portion 53. In other words, when assembling the frame elements, the worker can omit the extremely troublesome work process of connecting each element and then fixing each part with a fastener, which is a separate part. Therefore, the worker can easily perform the bed assembly work.

[0114] Furthermore, the fasteners required for assembling the elements of a bed, which were previously separate parts, are pre-installed on the essential frame elements of bed 1 (in this example, head frame 4), which prevents parts such as fasteners from being lost when assembling bed 1.

[0115] Furthermore, the first fastener is attached to this bed 1 at a position that takes into consideration the assembly work process, so that the first fastener does not interfere with the assembly work of the worker.

[0116] Also, when disassembling the bed 1, the worker can easily perform the work in the same manner as described above, and loss of parts such as fasteners can be prevented.

[0117] Furthermore, even when the assembly is stored in a disassembled state, loss of parts such as fasteners can be prevented.

[0118] <First Modification> Hereinafter, a modified example of the connection of the multiple parts of the disassembly bed 1 will be described with reference to FIG.

[0119] In this modification, the second engagement portion is a shaft holding portion 153, and the first fastener is a pin-shaped member 148. Note that the same members as those in the above-described embodiment are designated by the same reference numbers, and descriptions thereof will basically be omitted.

[0120] The shaft holding portion 153 is provided on the inside of the front end portion of the center frame 5. The shaft holding portion 153 has an opening 153a formed so that the interior thereof can accommodate the rotating shaft portion 100, and facing the center in the longitudinal direction of the bed. In the illustrated example, the opening 153a is formed at the rear of the shaft holding portion 153 in the front-rear direction. For example, the shaft holding portion 153 is formed in an inverted U shape by a front wall 154, an upper wall 155, and a lower wall 156. The upper wall 155 and the lower wall 156 each have an insertion hole 155a through which the pin-shaped member 148 is inserted in the up-down and rear directions. The insertion holes 155a, 155a are formed so as to penetrate in the up-down direction.

[0121] When assembling the frame, the center frame 5 is connected onto the base frame 7. At this time, the rotating shaft portion 100 is inserted into the shaft holding portion 153 through the opening 153a thereof and is housed inside the shaft holding portion 153. As a result, the rotating shaft portion 100 and the shaft holding portion 153 are engaged with each other.

[0122] In this engaged state, the center frame 5 is assembled in a predetermined relative position with respect to the base frame 7. However, in this state, there is a possibility that the rotating shaft portion 100 may come off from the shaft holding portion 153 through the opening 153a.

[0123] The pin-shaped member 148 is provided at a specific position of the HF vertical member 41 of the head frame 4. In the illustrated example, the pin-shaped member 148 is provided at the alignment portion 146 of the HF vertical member 41. Here, the specific position is a position where the pin-shaped member 148 is inserted into the insertion hole 155a and closes the opening 153a so that the rotating shaft portion 100 does not come off the shaft holding portion 153 when the bed 1 (at least three frames, that is, the base frame 7, the center frame 5, and the head frame 4) is assembled.

[0124] The pin-shaped member 148 is a rod-shaped member extending in the vertical direction of the bed 1, with its base fixed to the lower surface 146a of the alignment portion 146 and its tip 148a extending rearward.

[0125] When the rotating shaft portion 100 is accommodated in the shaft holding portion 153 (i.e., when the rotating shaft portion 100 and the shaft holding portion 153 are engaged), the pin-shaped member 148 is inserted into the upper and lower insertion holes 155a of the shaft holding portion 153, thereby blocking the opening 153a.

[0126] When assembling the frame, the head frame 4 is connected to the center frame 5. At this time, the pin-shaped members 148 of the head frame 4 pass through the upper and lower insertion holes 155a of the shaft holding portion 153.

[0127] In the illustrated example, when the head frame 4 is assembled to the center frame 5 at a predetermined relative position, the tip 148a of the pin-shaped member 148 is formed so as to protrude from the rear end of the insertion hole 155a.

[0128] This prevents the base frame 7 from coming off the center frame 5. The length of the pin-shaped member 148 may be such that the rotation shaft portion 100 does not come off the opening 153a.

[0129] As described above, the HF vertical member 41 and the CF vertical member 51 are fixed by the knob bolt 90, thereby fixing the above-mentioned engaged state.

[0130] The effects of the first modified example are basically the same as those of the above embodiment. In this example, the pin-shaped member 148 is provided on the lower surface 146a of the positioning portion 146. When connecting the head frame 4 to the center frame 5, the HF engaging portion 42 of the head frame 4 is engaged with the CF front protrusion 57 of the center frame 5, and the head frame 4 is rotated from above to below using this as a fulcrum to overlap the head frame 4 on the center frame 5. At this time, the positioning portion 146 aligns the upper surfaces of both frame elements 4, 5, and the pin-shaped member 148 can close the opening 153a.

[0131] By rotating the head frame 4 from above to below with respect to the center frame 5, using the engaged CF front protrusion 57 and the engagement portion 42 as a fulcrum, the pin-shaped member 148 closes the opening 153a, eliminating the need for the head frame 4 to slide back and forth with respect to the center frame 5. This makes it possible to assemble the bed even in a narrow space.

[0132] Therefore, the inter-frame engagement portion can be engaged simply by the process of connecting the frame elements, improving work efficiency.

[0133] In this example, the shaft holding portion 153 has an opening 153a facing the center in the longitudinal direction of the bed 1 (in the illustrated example, the shaft holding portion 153 has an opening 153a at the rear), but this is not limited to the example. The shaft holding portion 153 may open at the front or in any other direction. In this case, the pin-shaped member 148 is formed at a specific position where it can close the opening.

[0134] <Second Modification> Hereinafter, a second modified example of the connection of the multiple parts of the disassembly bed 1 will be described with reference to FIG.

[0135] In this modification, shaft holding portion 553 as the second engagement portion has an opening 553a, and further, opening / closing portion 81 for opening and closing opening 553a is attached to shaft holding portion 553. The first coupling has pressing member 348 for pressing opening / closing portion 81. Note that like members to the above embodiment are numbered likewise, and descriptions thereof will basically be omitted.

[0136] The shaft holding portion 553 is provided on the inside of the front end portion of the center frame 5. The shaft holding portion 553 is formed in a generally inverted U-shape having an opening 553a at the bottom, and houses the rotating shaft portion 100 therein. The front and rear ends of the shaft holding portion 553 are formed in an outward flap shape so as to seat on the first surface 81a of the opening / closing portion 81, respectively.

[0137] When assembling the frame, the center frame 5 is connected onto the base frame 7. At this time, the rotating shaft portion 100 is inserted into the shaft holding portion 553 through the opening 553a thereof and is housed inside the shaft holding portion 553. As a result, the rotating shaft portion 100 and the shaft holding portion 553 are engaged with each other.

[0138] In this engaged state, the center frame 5 is assembled at a predetermined relative position with respect to the base frame 7. However, in this state, there is a possibility that the rotating shaft portion 100 may come off through the opening 553a of the shaft holding portion 553.

[0139] The pressing member 348 is provided at a specific position of the head frame 4 and the center frame 5. Here, the specific position is a position where the pressing member 348 presses the opening / closing portion 81 to close the opening 553a so that the rotating shaft portion 100 does not come off the shaft holding portion 553 when the bed 1 (at least three frames, that is, the base frame 7, the center frame 5, and the head frame 4) is assembled.

[0140] Specifically, they are disposed at positions where the following operations are possible. The pressing member 348 closes the opening 553a via the opening / closing part 81. The opening / closing part 81 is formed in an L-shape, and is disposed rotatably below the rear end 555a of the shaft holding part 553 of the CF vertical member 51, with the axis 81c between the first surface 81a and the second surface 81b. The opening / closing part 81 is disposed with the second surface 81b approximately horizontal to the CF vertical member 51 and in contact with the rear end 555a of the shaft holding part 553.

[0141] The pressing member 348 is a rod-shaped member extending in the up-down direction of the bed 1.

[0142] When assembling the frame, when the head frame 4 is connected to the center frame 5, the tip 348a of the pressing member 348 presses the second surface 81b of the opening / closing portion 81, pushing the first surface 81a up to a horizontal plane, and the first surface 81a blocks the opening 553a of the shaft holding portion 553.

[0143] When the head frame 4 is assembled into a predetermined relative position with respect to the center frame 5, the pressing member 348 is arranged parallel to the second surface 81b, so that the opening / closing portion 81 does not return to its original state, and the first surface 81a remains blocking the opening 553a.

[0144] When the head frame 4 is connected to the center frame 5 in this manner, the pressing member 348 provided on the head frame 4 indirectly connects both frames 5, 7 via the opening / closing part 81 so that the base frame 7 does not come off from the center frame 5. The length of the first surface 81a may be such that the rotating shaft part 100 does not come off from the opening 553a.

[0145] As described above, the HF vertical member 41 and the CF vertical member 51 are fixed by the knob bolt 90, whereby the engagement state of the inter-frame engagement portion is fixed.

[0146] The effects of the second modified example are basically the same as those of the above embodiment. In addition, in this modified example, a pressing member 348 and an opening / closing part 81 are used as the first fastener instead of the pin-shaped member. This allows the worker to work more safely.

[0147] <Third Modification> Hereinafter, a third modified example of the connection of the multiple parts of the disassembly bed 1 will be described with reference to FIG.

[0148] In this modification, the second engagement portion is a shaft holding portion 653, and the first coupling is a pin-shaped member 448. Note that the same members as those in the above-described embodiment are designated by the same reference numbers, and descriptions thereof will basically be omitted.

[0149] The shaft holding portion 653 is provided on the inside of the front end portion of the center frame 5. The shaft holding portion 653 has an opening 653a facing the longitudinal end portion of the bed 1. In the illustrated example, the shaft holding portion 653 is formed in a substantially inverted U-shape with the opening 653a at the front, and houses the rotating shaft portion 100 therein. The front end portion of the shaft holding portion 653 has insertion holes (not illustrated) through which the pin-shaped members 448 are inserted in the up-down and rear directions.

[0150] When assembling the frame, the center frame 5 is connected onto the base frame 7. At this time, the rotating shaft portion 100 is inserted into the shaft holding portion 653 through the opening 653a thereof and is housed inside the shaft holding portion 653. As a result, the rotating shaft portion 100 and the shaft holding portion 653 are engaged with each other.

[0151] In this engaged state, the center frame 5 is assembled at a predetermined relative position with respect to the base frame 7. However, in this state, there is a possibility that the rotating shaft portion 100 may come off through the opening 653a of the shaft holding portion 653.

[0152] The pin-shaped member 448 is provided at a specific position of the head frame 4. Here, the specific position is a position where the pin-shaped member 448 closes the opening 653a so that the rotating shaft portion 100 does not come off from the shaft holding portion 653 when the bed 1 (at least three frames, the base frame 7, the center frame 5, and the head frame 4) is assembled. Note that the pin-shaped member 448 is formed in a substantially arc shape so as to follow the outer periphery of the rotating shaft portion 100 when the opening 653a is closed.

[0153] When assembling the frame, the head frame 4 is connected to the center frame 5. At this time, the pin-shaped members 448 of the head frame 4 pass through the upper and lower insertion holes of the shaft holding portion 653.

[0154] This prevents the base frame 7 from coming off the center frame 5. The length of the pin-shaped member 448 may be such that the rotation shaft portion 100 does not come off the opening 653a.

[0155] As described above, the HF vertical member 41 and the CF vertical member 51 are fixed by the knob bolt 90, whereby the engagement state of the inter-frame engagement portion is fixed.

[0156] The effects of the third modified example are basically the same as those of the first modified example and the like.

[0157] In addition, in this example, the pin-shaped member 448 is formed in a substantially arc shape so as to follow the outer periphery of the rotating shaft portion 100. Therefore, the head frame 4 can be rotated from above to below with respect to the center frame 5, with the engaged front protrusion 57 and the engaging portion 42 as a fulcrum, and the pin-shaped member 448 can smoothly close the opening 653a.

[0158] Furthermore, since the pin-shaped member 448 is inserted into the insertion hole by the rotational movement when the head frame 4 is connected to the center frame 5, the insertion hole does not need to be formed with extra play. Therefore, when the center frame 5 and the head frame 4 are connected, rattling between them can be prevented. In this example, an example in which an insertion hole is formed in the shaft holding part 653 as a means for the pin-shaped member 448 to close the opening 653a has been shown, but this is not limited to this. For example, the opening 653a may be closed so that the pin-shaped member 448 abuts against the rear end of the shaft holding part 653.

[0159] In this example, the shaft holding portion 653 has an opening 653a facing the end of the bed 1 in the longitudinal direction (in the illustrated example, the shaft holding portion 653 has an opening 653a in the front), but this is not limited to the example. The shaft holding portion 653 may open in the rear direction or in any other direction. In this case, the pin-shaped member 448 is formed in a specific position that can close the opening.

[0160] The above-described embodiments are merely examples for the purpose of explanation, and the scope of the present invention is not limited to these embodiments. The present invention can be embodied in various forms other than the above-described embodiments.

[0161] In the above embodiment, an example has been described in which the base frame 7, the center frame 5, and the head frame 4 among the multiple main components are combined and connected (fixed) at predetermined relative positions. However, as long as the multiple components of the bed 1 are connected (fixed), the present invention is not limited to the above example, and any combination of components may be used.

[0162] For example, the base frame 7, the center frame 5, and the foot frame 6 may be connected to each other. In this case, it is preferable that inter-frame engagement parts (first engagement part and second engagement part) are provided at the rear end of the base frame 7 and the rear end of the center frame 5. In this case, for example, in the X link mechanism 72, instead of fixing the front ends of the first link 721 and the second link 723 to be rotatable relative to the center frame 5 and the base frame 7, respectively, and connecting the rear ends of these elements 721, 723 to be slidable in the front-rear direction as described above, the rear ends of these elements 721, 723 may be fixed to be rotatable relative to the center frame 5 and the base frame 7, and the front ends may be connected to be slidable in the front-rear direction.

[0163] For example, in the above embodiment, the inter-frame engagement portion has been described as the shaft on the base frame 7 side (specifically, the rotating shaft portion 100) (first engagement portion) and the shaft holding portion on the center frame 5 side (second engagement portion). However, this is not limited thereto. For example, the shaft on the center frame 5 side may be engaged with the shaft holding portion of the base frame 7.

[0164] For example, in the above embodiment, the first engagement portion and the second engagement portion are described as a shaft and a shaft holder, but it is of course not limited to this and other engagement means may be used.

[0165] In the bed 1 according to the above embodiment, in addition to the above features, a device for reducing the number of fasteners for fastening multiple components of the bed 1 is realized.

[0166] Specifically, this is realized, for example, in the following manner. For example, bed 1 realizes a reduction in fasteners when fastening fixed legs 714 to leg parts 712. Below, the legs 712 of bed 1 will be described with reference to FIG. 15. As described above, legs 712 are respectively extended from the front and rear ends of the pair of vertical members 710. Fixed legs 714 may be detachably attached to each leg part 712 (see FIG. 1). Fixed legs 714 are installed on the floor (installation surface) and support base frame 7 from below.

[0167] The fixed leg 714 may be formed so as to be detachable with one touch from the leg 712. In other words, a worker may be able to connect (or separate) a set of parts to be connected (or separated) to each other simply by using his or her hands, without using a fastener as an individual part separated from the set of parts to be connected (or separated) to each other (for example, the set of the fixed leg 714 and the leg 712).

[0168] For example, the fixed leg 714 is provided with a hole W for inserting the leg 712, and a claw 714b protruding inwardly from the hole W is elastically supported on the side surface 714a. Meanwhile, a recess 712b is formed on both side surfaces (or only one side) 712a of the leg 712. As a result, when the leg 712 is inserted into the hole W of the fixed leg 714, the claw 714b is fitted into the recess 712b. Furthermore, when removing the fixed leg 714 from the leg 712, if the leg 712 is pulled relative to the fixed leg 714 in the direction opposite to that of insertion, the claw 714b fitted into the recess 712b is released from the recess 712b, and the leg 712 is removed from the fixed leg 714.

[0169] Further, for example, the bed 1 realizes a reduction in the number of fasteners used when connecting the back / leg interlocking link 133 and the bracket 123 of the back-raising mechanism. Hereinafter, the back / leg interlocking link 133 and the bracket 123 will be described with reference to FIG.

[0170] As shown in Fig. 6 and other figures, an actuator 122 for freely raising and lowering the back bottom 31 is provided in the center of the front HF horizontal member 49. The actuator 122 has a rod 122b that can be moved forward and backward in the front-rear direction by an electric motor. As shown in Fig. 16 and other figures, the tip of the rod 122b is rotatably attached via a pin 124 to the front end of a bracket 123 that is generally triangular in side view.

[0171] The center of the bracket 123 is fixed to a rotating bar 125 that is rotatably attached between a pair of HF vertical members 41. Therefore, the bracket 123 is rotated around the rotating bar 125 by the forward and backward movement of the rod 122b of the actuator 122, and the rotating bar 125 also rotates accordingly.

[0172] A back-raising arm 126 is fixed to each of the left and right ends of the rotating bar 125, and the tip end of the back-raising arm 126 is rotatably fixed to a back-raising bar 127. The rear end of the back-raising bar 127 is fixed to the left and right bars 121 located at the rear of the bed 1. As a result, when the rotating bar 125 is rotated by the forward and backward movement of the rod 122b of the actuator 122, the back-raising arm 126 also rotates accordingly, and as a result, the back-raising bar 127 is rotated. Since the back-raising bar 127 supports the back bottom 31 (31, 31B, 31c) from below, the back bottom 31 can be raised or lowered by the actuator 122.

[0173] A bar (connected portion) 128 which is connected to a connecting portion 135 of a back-leg interlocking link 133 (described later) is attached to the rear end of the bracket 123 so as to extend in the left-right direction.

[0174] A CF horizontal member 59 is installed between the CF vertical members 51. A leg lifting bar 134 protruding from the CF horizontal member 59 toward the rear of the bed 1 is rotatably attached to the CF horizontal member 59. The front end of the leg lifting bar 134 is rotatably connected to the rear end of the back / leg interlocking link 133. Therefore, as the back / leg interlocking link 133 moves in the front-rear direction, the rear end of the leg lifting bar 134 moves up and down to drive the knee-leg bottom 33.

[0175] A connecting portion 135 that is connected to the bar 128 of the bracket 123 is provided at the front end of the back-leg interlocking link 133. This connecting portion 135 engages with and is connected to the bar 128, so that the back-leg interlocking link 133 moves in an interlocking manner in the front-rear direction of the reclining bed B as the bracket 123 rotates. As a result, the back-leg interlocking link 133 and the leg raising bar 134 rotate around the CF horizontal member 59.

[0176] In conventional beds, the back-leg interlocking link 133 and the bracket 123 each have a connecting hole, and these connecting holes are connected with a pin. However, the work of connecting the bracket 123 and the back-leg interlocking link 133 takes time and effort, and further, when disassembling the reclining bed or releasing the interlocking between the back bottom 31 and the knee-leg bottom 33, the pin needs to be removed, which also takes time and effort.

[0177] In this bed 1, the connecting part 135 of the back-leg interlocking link 133 is detachably connected to the bar 128, which is the connected part of the bracket 123, without using a pin as a separate part. Specifically, the connecting part 135 has an engagement hole 135A that receives and engages with the bar 128. The engagement hole 135A extends in a direction different from the direction in which the connecting part 135 moves (mainly the front-rear direction), for example, downwardly, which is substantially perpendicular to the moving direction, and has an opening 135B at the end of the extension (i.e., the lower end) for inserting and removing the bar 128. In addition, since the engagement hole 135A extends downward toward the opening 135B of the engagement hole 135A, the weight of the connecting part 135 (back-leg interlocking link 133) prevents the connecting part 135 from moving upward and coming off the bar 128 of the back-raising mechanism by simply receiving the bar 128 in the engagement hole 135A of the connecting part 135 and connecting the two. Therefore, when connecting and disconnecting the back-raising mechanism and the back-leg interlocking link 133, the operator only needs to perform a very simple one-touch operation of lowering the connecting part 135 to insert the bar 128 into the engagement hole 135A, and then raising the connecting part 135 to take the bar 128 out of the engagement hole 135A. In this way, the connection and disconnection work between the bracket 123 and the back-leg interlocking link 133 can be performed more easily and in a shorter time.

[0178] Although not shown, the principle of the mechanism for one-touch connection and disconnection between the above-mentioned back-raising mechanism and the back-leg interlocking link 133 can also be applied to the case where a high-back bending mechanism for bending the high-back bottom 31A relative to the low-back bottom 31B and a high-back interlocking link for interlocking the high-back bending mechanism with the back-raising mechanism are connected to the back-raising mechanism. The high-back bending mechanism and the high-back interlocking link can be provided in the back bottom 31.

[0179] <Second embodiment> Hereinafter, a second embodiment of the connection of multiple parts of a disassembly bed 1 will be described with reference to Figs. 17 to 25. For example, the bed 1 achieves a reduction in the number of fasteners required when connecting the base frame 7 and the center frame 5. In this embodiment, the same members as those in the first embodiment may be described using the same reference numerals. Also, the description of the same configuration as the first embodiment may be omitted.

[0180] In the above example, the rear end of the X-link mechanism 72 of the base frame 7 is slidably movable in the front-rear direction relative to the BF vertical member 710 and the CF vertical member 51, thereby enabling the main frame 2 on which the bottom 3 is placed to move up and down. However, in the figures from FIG. 17 onwards which are exemplified in this embodiment, the X-link mechanism 72 has a configuration in which its front end is slidable relative to the base 71. In any of the examples, there is no difference in the lifting and lowering function of the bed 1 including the X-link mechanism 72. In other words, in the X-link mechanism 72, the end that is rotatably fixed to the base frame 7 and the center frame 5 and the end that is slidable may be either the front or rear.

[0181] In this embodiment, the first engaging portion of the first component and the second engaging portion of the second component are connected to each other by a fastener of the second component. For example, the first component may be the base frame 7, and the second component may be the center frame 5.

[0182] 17 to 22, an example of assembly of the base frame 7 and the center frame 5 using the inter-frame engagement parts (first engagement part and second engagement part) and the fasteners will be described below. For example, as shown in FIG. 17 etc., a roller-shaped guide end 1730 that can rotate around an axis is provided at the front end of the second link 723 on the outer side in the left-right direction. A guide member 1718 that houses the guide end 1730 slidably in the front-rear direction is provided on the inner side at the front of each of the pair of BF vertical members 710. Thus, the front end of the second link 723 is slidably and rotatably connected to the BF vertical member 710.

[0183] Also, for example, the first link 721 is provided with a roller-shaped guide end 1729 that is rotatable around an axis at its front end, outward in the left-right direction. A guide member 152 is provided in front of the pair of CF vertical members 51, below and on the inside thereof, for storing the guide end 1729 slidably in the front-rear direction. Thus, the front end of the first link 721 is connected to the CF vertical members 51 slidably and rotatably in the front-rear direction.

[0184] The rear side of the first link 721 is rotatably connected to the rear of the base frame 7. In the illustrated example, the rear end of the first link 721 is rotatably connected to the BF horizontal member 716 on the rear side of the base frame 7 via a connecting member 721F.

[0185] The rear side of the second link 723 is rotatably connected to the rear of the center frame 5. For example, the connecting rod 727F is rotatably attached to the CF vertical member 51. In the illustrated example, the pivot shafts 1100 are rotatably provided on the left and right outer sides of the connecting rod 727F. The pivot shafts 1100 are, for example, cylindrical rollers. The pivot shafts 1100 may be formed by extending the connecting rods 727F outward in the left-right direction of each of the first links 721.

[0186] The first engagement portion is provided at one end of the base frame 7. For example, the first engagement portion is an outwardly protruding portion provided above the X link mechanism 72 on the outside of the rear end thereof. In the illustrated example, the protruding portion is a rotating shaft portion 1100 provided at the rear end of the first link 721. The rotating shaft portion 1100 may be made of, for example, steel, synthetic resin, or any other material.

[0187] The second engagement portion is provided at one end of the center frame 5. For example, the second engagement portion is a shaft holding portion 1053 provided on the inside of the rear end of the CF vertical member 51. In the illustrated example, the shaft holding portion 1053 is provided across the CF vertical member 51 and the mounting member 51F extending downward therefrom. The shaft holding portion 1053 may be made of, for example, steel, synthetic resin, or any other material.

[0188] For example, as shown in FIG. 19, the shaft holding portion 1053 is formed in a substantially inverted U-shape and has an upper piece portion 1055 extending forward from the upper end of the accommodation portion 1054, and a lower piece portion 1056 extending in the front-rear direction from the lower end of the accommodation portion 1054. The accommodation portion 1054 for accommodating the rotating shaft portion 1100 is formed inside the shaft holding portion 1053. The accommodation portion 1054 opens toward the center side in the front-rear direction of the bed 1. The upper piece portion 1055 and the lower piece portion 1056 form a passage for guiding the rotating shaft portion 1100 into the accommodation portion 1054. Note that the length of the lower piece portion 1056 in the front-rear direction of the shaft holding portion 1053 is shorter than that of the upper piece portion 1055. As a result, a gap is formed for inserting the rotating shaft portion 1100 from below the shaft holding portion 1053 when assembling the center frame 5 to the base frame 7.

[0189] A first hole 1055a is formed vertically penetrating the upper piece 1055. A second hole 1056a is formed vertically penetrating the lower piece 1056.

[0190] 19 to 21, the fastener is provided on the center frame 5 and cooperates with the second engagement portion. Specifically, for example, the fastener is a locking member 1060. In the illustrated example, the locking member 1060 is provided on the inside of the mounting member 51F of the CF vertical member 51. The locking member 1060 may be made of, for example, steel, synthetic resin, or any other material.

[0191] The locking member 1060 holds the rotating shaft portion 1100 housed in the housing portion 1054 of the shaft holding portion 1053. The locking member 1060 has a main body 1061, an attachment shaft 1062, and a handle portion 1063. The attachment shaft 1062 supports the main body 1061 on the inside of the CF vertical member 51 so as to be rotatable.

[0192] The mounting shaft 1062 is attached to the CF vertical member 51 so as to be adjacent to the shaft holding portion 1053. Specifically, for example, the mounting shaft 1062 is attached to the mounting member 51F of the CF vertical member 51 so as to be located on the opposite side in the front-rear direction to the opening of the storage portion 1054 (located behind the shaft holding portion 1053 in the illustrated example). The main body 1061 rotates about the mounting shaft 1062.

[0193] The main body 1061 is formed with a space C surrounding a part of the shaft holding portion 1053, and a lock piece 1064 closing the opening of the accommodation portion 1054. In the illustrated example, the lock piece 1064 is located in front of the mounting shaft 1062. A tip portion 1064a of the lock piece 1064 is formed so as to point approximately downward. The lock piece 1064 is formed so that the tip portion 1064a is inserted from above downward into the second hole 1056a via the first hole 1055a by the rotation of the main body 1061.

[0194] The mounting shaft 1062 is provided with a coil spring S as an elastic body. The coil spring S is attached to the mounting shaft 1062, one end S1 is fixed to the main body 1061, and the other end S2 is fixed to the center frame 5 (mounting member 51F). When the locking member 1060 is in the normal position, the locking piece 1064 is provided in a position where it closes the opening of the storage section 1054, for example, as shown in FIG. 19, by the biasing force of the coil spring S. Note that the "normal position" in this specification refers to a state where no force is applied to the main body 1061 of the locking member 1060. In other words, it is a state where no pressure is applied to the locking member 1060 by the rotating shaft portion 1100 or the operator's fingers. For example, it is a state where the center frame 5 is in a single state, or a state where the base frame 7 and the center frame 5 are assembled.

[0195] The lock piece 1064 has a rear surface 1064b facing the storage section 1054 in the normal position, and a front surface 1064c facing the center side in the front-rear direction (front in the illustrated example). The front surface 1064c has an inclined surface that inclines from above to below toward the storage section 1054 in the normal position. In the illustrated example, the inclined surface inclines backward from above to below. When the rotating shaft portion 1100 is moved backward (toward the storage section 1054) through the passage between the upper piece portion 1055 and the lower piece portion 1056, the rotating shaft portion 1100 presses the front surface 1064c of the lock piece 1064, and the main body 1061 rotates about the mounting shaft 1062 against the bias of the coil spring S. In the illustrated example, the main body 1061 rotates clockwise about the mounting shaft 1062. Then, the rotating shaft portion 1100 passes over the tip portion 1064a of the main body 1061 and is moved into the housing portion 1054. At this time, the main body 1061 is returned to its normal position by the bias of the coil spring S.

[0196] In addition, in the normal position, the lock piece 1064 passes through the first hole 1055a and the tip portion 1064a is inserted into the second hole 1056a. As a result, the storage portion 1054 is closed by the rear surface 1064b of the lock piece 1064.

[0197] The rear surface 1064b may be configured so that the storage section 1054 is closed in the normal position. For example, as shown in FIG. 22, the angle θ of the rear surface 1064b with respect to a line (shown by a dotted line) connecting the center of the mounting shaft 1062 and the tangent point of the rear surface 1064b and the rotating shaft section 1100 is preferably 90 degrees or less. More preferably, the angle θ is preferably less than 90 degrees. For example, in the illustrated example, the rear surface 1064b is preferably inclined backward from above to below. By setting the angle θ in this manner, it is possible to prevent the rotating shaft section 1100 from moving forward due to vibration or an external force on the bed 1 (for example, an external force applied to the center frame 5), which causes the lock piece 1064 to prevent the closing of the storage section 1054 from being released.

[0198] The handle portion 1063 is a member that allows an operator or the like to rotate the main body 1061 with his or her fingers. In order to move the main body 1061 against the bias of the coil spring S, the handle portion 1063 is desirably provided on the opposite side of the lock piece 1064 in the front-rear direction with respect to the mounting shaft 1062.

[0199] <Frame assembly> The assembly process of the base frame 7 and the center frame 5 according to this embodiment will be described.

[0200] (1) The worker places the center frame 5 on the base frame 7, for example, as shown by the arrow in Fig. 17. At this time, as shown in Fig. 18, for example, the guide ends 1729 at the front ends of the first links 721 are inserted from the gaps below the guide members 152 of the CF vertical members 51 and come into contact with the upper pieces of the guide members 152. In addition, the pivot shaft portions 1100 at the rear ends of the second links 723 are inserted from below the shaft holders 1053 of the CF vertical members 51 and come into contact with the upper piece portions 1055.

[0201] (2) Next, the worker slides the center frame 5 in the assembly direction (rearward in the illustrated example) relative to the base frame 7. Specifically, for example, the worker slides the center frame 5 rearward relative to the base frame 7 from the state (1) illustrated in FIG. 18 so that the guide end 1729 slides rearward inside the guide member 152 and the rotating shaft portion 1100 slides rearward inside the shaft holding portion 1053. As the rotating shaft portion 1100 slides rearward, the front surface 1064c of the lock piece 1064 is pressed from the front by the rotating shaft portion 1100, the main body 1061 rotates around the mounting shaft 1062 (rotates clockwise in the illustrated example), the lock piece 1064 is pushed up, and the rotating shaft portion 1100 is accommodated in the accommodation portion 1054. Then, the main body 1061 returns to its normal position due to the biasing force of the coil spring S (in the illustrated example, the main body 1061 rotates counterclockwise around the mounting shaft 1062 to return to its normal position), and the accommodation section 1054 is closed by the lock piece 1064 with the rotating shaft section 1100 accommodated in the accommodation section 1054. This maintains the state in which the rotating shaft section 1100 is engaged with the accommodation section 1054 of the shaft holder 1053. After this, the worker assembles the frame by attaching the head frame 4 and the foot frame 6 to the center frame 5, and assembles the bed 1 by placing the bottom 3, etc.

[0202] Furthermore, when disassembling the base frame 7 and the center frame 5, the worker holds the left and right CF vertical members 51 in each hand and presses the left and right handles 1063 with the thumbs or the like (in the illustrated example, pressing clockwise) to rotate the main body 1061 from the normal position around the mounting shaft 1062 (in the illustrated example, clockwise) to release the closure of the storage section. Then, the worker slides the center frame 5 from the base frame 7 in the direction for releasing the assembly (forward in the illustrated example) and removes the rotating shaft section 1100 from within the storage section 1054. Then, the center frame 5 is lifted up and removed from the base frame 7.

[0203] As described above, in the bed 1 according to this embodiment, simply by assembling the base frame 7 and the center frame 5, it is possible to prevent the rotation shaft portion 1100 from coming off the shaft holder 153. In other words, when assembling the base frame 7 and the center frame 5, the worker can omit the extremely tedious work process of connecting each element and then fixing each part with a fastener, which is a separate part. Therefore, the worker can easily perform the assembly work of the base frame 7 and the center frame 5.

[0204] Furthermore, the fasteners required for assembling the elements of a bed, which were previously separate parts, are pre-installed on the essential frame elements of bed 1 (in this example, center frame 5), which prevents parts such as fasteners from being lost or installed incorrectly when assembling bed 1.

[0205] Furthermore, in this bed 1, the fasteners are disposed at positions that take into consideration the work steps of the assembly work, so that the first fasteners do not interfere with the assembly work of the worker.

[0206] Also, when disassembling the bed 1, the worker can easily perform the work in the same manner as described above, and loss of parts such as fasteners can be prevented.

[0207] Furthermore, even when the assembly is stored in a disassembled state, loss of parts such as fasteners can be prevented.

[0208] <Modification> Modifications of the fastener of the second embodiment will now be described with reference to FIGS.

[0209] In this embodiment, as described above, the locking member 1060 as a fastener maintains the accommodating section 1054 in a closed state in the normal position by the biasing force of an elastic body (a coil spring S in the illustrated example). In this modified example, the fastener is a locking member 2060 instead of the locking member 1060. Descriptions of the configuration and functions of the locking member 2060 that are similar to those of the locking member 1060 may be omitted. Note that similar members to those in the above embodiment are numbered similarly, and descriptions thereof will basically be omitted.

[0210] The locking member 2060 holds the rotating shaft portion 1100 housed in the housing portion 1054 of the shaft holding portion 1053. The locking member 2060 has a main body 2061, an attachment shaft 2062, and a handle portion 2063. The attachment shaft 2062 supports the main body 2061 on the inside of the CF vertical member 51 so as to be rotatable.

[0211] The mounting shaft 2062 is attached to the CF vertical member 51 so as to be adjacent to the shaft holding portion 1053. Specifically, for example, the mounting shaft 2062 is attached to the mounting member 51F of the CF vertical member 51 so as to be located on the opposite side in the front-rear direction to the opening side of the storage portion 1054 (located behind the shaft holding portion 1053 in the illustrated example). The main body 2061 rotates about the mounting shaft 2062.

[0212] The main body 2061 is formed with a space C surrounding a part of the shaft holding portion 1053, and a lock piece 2064 closing the opening of the accommodation portion 1054. In the illustrated example, the lock piece 2064 is located in front of the mounting shaft 2062. A tip portion 2064a of the lock piece 2064 is formed so as to point approximately downward. The lock piece 2064 is formed so that the tip portion 2064a is inserted from above downward into the second hole 1056a via the first hole 1055a by rotation of the main body 2061.

[0213] In the locking member 2060 of this modified example, the locking piece 2064 is brought into a position where it closes the opening of the accommodation portion 1054 due to the weight of the main body 2061 (normal position).

[0214] The front surface 2064c of the lock piece 2064 has an inclined surface that inclines from above toward the storage section 1054 in the normal position. In the illustrated example, the inclined surface inclines backward from above toward the storage section 1054. When the rotating shaft portion 1100 is moved backward (toward the storage section 1054) through the passage between the upper piece portion 1055 and the lower piece portion 1056, the rotating shaft portion 1100 presses the front surface 2064c of the lock piece 2064, and the main body 2061 rotates around the mounting shaft 2062. In the illustrated example, the main body 2061 rotates clockwise around the mounting shaft 2062. Then, the rotating shaft portion 1100 moves over the tip portion 2064a of the main body 2061 and moves into the storage section 1054. At this time, the main body 2061 returns to the normal position by its own weight.

[0215] In addition, the lock piece 2064 is similar to the lock piece 2064 in that, in the normal position, the tip portion 1064a passes through the first hole 1055a and is inserted into the second hole 1056a. Also, the angle θ of the rear surface 2064b with respect to the line (shown by a dotted line) connecting the center of the mounting shaft 2062 and the point of contact of the rear surface 2064b and the rotating shaft portion 1100 is the same as that described above with reference to FIG.

[0216] In this modification, the main body 2061 maintains the normal position by its own weight, so that in the normal position, the center of gravity is on the side of the lock piece 2064 with respect to the mounting shaft 2062. It is desirable that the handle portion 2063 be provided approximately above the mounting shaft 1062.

[0217] Hereinafter, another embodiment (third embodiment) of the present invention will be described with reference to the drawings. In the description of this embodiment, the reference symbols in the drawings will be different from those in the above-mentioned embodiments (first and second embodiments). Therefore, the reference symbols will not overlap in Figures 1 to 25 and Figures 26 to 35.

[0218] Fig. 26 is a schematic diagram of the electric bed 1 according to this embodiment. Fig. 27 is an exploded view of the electric bed 1 in Fig. 26. Fig. 28 is an exploded view of the frame portion 10.

[0219] The electric bed 1 according to one embodiment shown in Fig. 26 and Fig. 27 is a nursing bed used in, for example, hospitals and nursing care facilities. The electric bed 1 is formed in a vertically elongated, generally rectangular shape in a plan view in order to support the body of a reclining person.

[0220] The electric bed 1 has a frame part 10 installed on a floor (not shown), a bottom 20 provided on the upper part of the frame part 10, a headboard 30 and a footboard 31 respectively provided on the front and rear ends of the frame part 10, and a hand switch 2 for operating a movable mechanism described later. In the following description, the front-rear direction refers to the direction from the upper left to the lower right in FIG. 26, that is, the length direction of the electric bed 1, with the upper left being the front and the lower right being the rear in FIG. 26. The left-right direction refers to the direction from the lower left to the upper right in FIG. 26, that is, the width direction of the electric bed 1, with the lower left being the left and the upper right being the right in FIG. Furthermore, the up-down direction refers to the direction from the upper to the lower in FIG. 26, that is, the up-down direction of the electric bed 1, with the up being the up and the down being the down. In the following, axes indicating directions are shown appropriately in the figures.

[0221] As shown in Figures 27 and 28, the frame section (bed frame) 10 has a plurality of subframes, namely, a base frame 11, a head frame 12 provided on the upper part of the base frame 11, a center frame 13, and a foot frame 14, and four fixed legs 15 disposed on a floor (not shown) and attached to the four corners of the base frame 11. The fixed legs 15 stand on the floor and support the base frame 11 from below. The base frame 11, the head frame 12, the center frame 13, and the foot frame 14 are made of steel, and their detailed configurations will be described later.

[0222] As shown in Fig. 26 and Fig. 27, the bottom 20 supports a bed mat (not shown) from below, and has a number of bottom elements such as a back bottom 21, a waist bottom 22, a knee bottom 23, and a leg bottom 24. The angles between the bottom elements 21 to 24 are variable, which allows the bottom 20 to bend. For example, the angles of the back bottom 21, the knee bottom 23, and the leg bottom 24 relative to the waist bottom 22 are variable. The bottom 20 is made of, for example, steel or synthetic resin.

[0223] When transporting or storing the electric bed 1, it is disassembled into a number of main parts, such as a base frame 11, a head frame 12, a center frame 13, a foot frame 14, a back bottom 21, a waist bottom 22, a knee bottom 23, and a leg bottom 24, and other parts (descriptions are omitted). When these separated parts are interconnected, the completed electric bed 1 is assembled as shown in FIG.

[0224] Next, the base frame 11, the head frame 12, the center frame 13, and the foot frame 14 will be described.

[0225] As shown in FIG. 28, the base frame 11 includes a first base portion 11A that is placed on a floor (installation surface), an X-link mechanism 11B that serves as a lifting mechanism (movable mechanism), and a first actuator 11C.

[0226] The first base 11A has a pair of front and rear bars (BF vertical members) 110 extending in the front-rear direction and arranged at a predetermined interval in the left-right direction, and a pair of left and right bars (BF horizontal members) 111 provided at the front and rear of the front and rear bars 110 to connect the front and rear bars 110. Fixed legs 15 (FIG. 27) are attached to the front and rear ends of the front and rear bars 110, respectively, as shown in FIG. 26. A guide member 112 is provided on the inside rear of the pair of front and rear bars 110. The guide member 112 supports a connecting bar 115A of the X link mechanism 11B so that it can slide in the front-rear direction relative to the first base 11A.

[0227] The X-link mechanism 11B is provided on the first base 11A. The X-link mechanism 11B mainly includes a pair of a first link 113 and a second link 114, and a plurality of connecting bars 115A, 115B, and 115C. Each of the first link 113 and each of the second link 114 extends in the front-rear direction, and is rotatably connected to each other at approximately the center in the front-rear direction by a pin 116. That is, the pair of the first link 113 and the second link 114 is connected to each other in an X-shape in a side view with the pin 116 as the axis center. A pair of the first link 113 and the second link 114 is provided with a gap therebetween in the left-right direction.

[0228] The rear end of each second link 114 is connected to a connecting bar 115A extending in the left-right direction. The connecting bar 115A is supported on the guide member 112 so as to be slidable in the front-rear direction. The front end of each second link 114 is connected to a connecting bar 115B extending in the left-right direction. The rear end of each first link 113 is connected to a connecting bar 115C extending in the left-right direction. The front end of each first link 113 is rotatably connected to the front left-right bar 111.

[0229] A support bar 117 is connected to the front-rear bar 110 at the rear of the rear left-right bar 111. A first actuator 11C for driving the X-link mechanism 11B is provided at the center of the support bar 117. The first actuator 11C has a first electric motor 118A and a first rod 118B that is movable forward and backward by the first electric motor 118A. The tip of the first rod 118B is connected to the rear end of the first link 113 via the connecting bar 115C. Therefore, the connecting bar 115C is moved up and down by the forward and backward movement of the first rod 118B of the first actuator 11C. This drives the X-link mechanism, and the vertical positions of the upper ends of the first links 113 and the second links 114 are changed in conjunction with each other. In this way, the first links 113 and the second links 114 rotate and rise, and the center frame 13 rises relative to the base frame 11.

[0230] The first electric motor 118A is connected to a first motor electric wire 50. The first motor electric wire 50 will be described in detail later.

[0231] The head frame 12 includes a second base portion 12A, an arm mechanism 12B serving as a raising and lowering mechanism (movable mechanism), and a second actuator 12C.

[0232] The second base 12A has a pair of front and rear bars 120 (HF vertical members) extending in the front-to-rear direction and arranged at a predetermined distance in the left-to-right direction, and a pair of left and right bars (HF horizontal members) 121 that are provided at the front and center of the front and rear bars 120, respectively, and connect these front and rear bars 120.

[0233] The arm mechanism 12B is provided at the center of the left and right bars 121 located on the rear side. The arm mechanism 12B includes a back-raising arm 122, a shaft 123, and a pair of rollers 124. The back-raising arm 122 extends in the front-rear direction and is rotatably provided at the center of the rear left and right bars 121. The shaft 123 is provided at the tip of the back-raising arm 122. Each roller 124 is rotatably provided at both ends of the shaft 123.

[0234] The second actuator 12C has a second electric motor 125 and a second rod 126 that is movable forward and backward by the second electric motor 125. The tip of the rod 126 is rotatably attached to the center of the back-raising arm 122. The back-raising arm 122 is rotated and raised or lowered by the forward and backward movement of the rod 126 of the actuator 12C. Since the back-raising arm supports the back bottom 21 from below, the back bottom 21 can be raised or lowered by the second actuator 12C.

[0235] A first engagement portion 127 is provided at the rear end of each front-rear bar 120. The first engagement portion 127 is formed in a concave shape that opens toward the rear, and engages to accommodate a front protrusion 134A on the outer surface of each front-rear bar 130. Each front-rear bar 120 is formed with a through hole 120a that penetrates in the left-right direction.

[0236] A second motor electric wire 51 is connected to the second electric motor 125. The second motor electric wire 51 will be described in detail later.

[0237] The center frame 13 includes a third base portion 13A and a control portion 13B.

[0238] The third base 13A has a pair of front and rear bars (CF vertical members) 130 extending in the front-rear direction and arranged at a predetermined interval in the left-right direction, and a pair of left and right bars (CF horizontal members) 131 provided at the rear and center of the front and rear bars 130 and connecting these front and rear bars 130.

[0239] A guide member 132 is provided on the inside of the rear of each front-rear bar 130. A guided portion 113A at the rear end of the first link 113 is engaged with the guide member 132 so as to be slidable in the front-rear direction. A shaft holding portion 133 is provided on the inside of the front end of each front-rear bar 130. The shaft holding portion 133 has an opening facing downward. The shaft holding portion 133 engages with both ends of the connecting bar 115B so as to cover the both ends from above.

[0240] Each front and rear bars 130 has a front protrusion 134A and a rear protrusion 134B that protrude outward on its outer surface. The front protrusion 134A is a protrusion for attaching the head frame 12 to the center frame 13. The rear protrusion 134B is a protrusion for attaching the foot frame 14 to the center frame 13.

[0241] A front through hole 135A and a rear through hole 135B penetrating in the left-right direction are formed in each of the front and rear bars 130. The front through hole 135A is a hole for fixing the head frame 12 to the center frame 13. The rear through hole 135B is a hole for fixing the foot frame 14 to the center frame 13.

[0242] A leg lifting bar 137 extending rearward from the left and right bars 131 is connected to the center of the front left and right bars 131. A back-leg interlocking link 136 extending forward is connected to the leg lifting bar 137.

[0243] The front end of the back / leg interlocking link 136 is configured to be connectable to the back-raising arm 122. When the front end of the back / leg interlocking link 136 engages with and is connected to the back-raising arm 122, the back / leg interlocking link 136 moves in the front-rear direction in conjunction with the rotation of the back-raising arm 122, and as a result, the back / leg interlocking link 136 and the leg-raising bar 137 rotate.

[0244] A roller 138 is rotatably fixed to the tip (rear end) of the leg lifting bar 137. This roller 138 abuts on the underside of the knee bottom 23 and the leg bottom 24 near the joint, so that as the leg lifting bar 137 rotates, the roller 138 pushes up the knee bottom 23 and the leg bottom 24 from below, thereby raising and lowering the knee bottom 23 and the leg bottom 24.

[0245] The rear side portion of the head frame 12 is connected to the center frame 13. The front and rear bars 120 and the front and rear bars 130 are overlapped in a side view, the first engagement portions 127 are engaged with the front protrusions 134A, and the knob bolts 40 are passed through the through holes 120a and screwed into the front through holes 135A.

[0246] The center frame 13 is connected to the base frame 11. The guide members 132 of the center frame 13 accommodate the guided portions 113A at the rear ends of the first links 113 so as to be slidable in the front-rear direction, and the shaft holders 133 of the front-rear bars 130 engage with both ends of the connecting bar 115B so as to cover them from above, thereby connecting the center frame 13 to the base frame 11. When the center frame 13 moves up and down, the guided portions 113A slide within the guide members 132.

[0247] FIG. 29 is an explanatory diagram of the control unit 13B, where (a) shows a state in which the cover 139B is open, and (b) shows a state in which the cover 139B is closed.

[0248] The control unit 13B is attached to the left and right bars 131 on the front side. The control unit 13B has a control box 139 and a control board (not shown). The control box 139 has a substantially rectangular parallelepiped shape and has a main body 139A and a cover 139B. An opening 139c is formed in a part of the main body 139A, and a control board (not shown) and a plurality of sockets (connectors) (not shown) are provided inside the main body 139A. A concave-convex portion 139D is provided at the front end and left and right parts of the opening 139c of the main body 139A. The main connectors 52B and 53B described below are inserted into the sockets (not shown), and the cords 52A and 53A described below are inserted into the recesses of the concave-convex portion 139D. Two engaged holes 139e penetrating the front end of the main body 139A are formed below the concave-convex portion 139D at the front end of the main body 139A.

[0249] The cover 139B is configured to cover the opening 139c of the main body 139A and is rotatably attached to the main body 139A. Two engagement claws 139F are provided at the end of the cover 139B. The cover 139B is configured to close the opening 139c by rotating the cover 139B to cover the opening 139c and engaging each engagement claw 139F with each engagement hole 139e. In addition, when the cover 139B closes the opening 139c, notches 139g are formed in the front end and left and right parts of the cover 139B, so that the cover 139B does not pinch the cords 52A and 53A. The cover 139B and the uneven part 139D prevent the first relay wire 52 and the second relay wire 53 from coming off the control unit 13B. Therefore, the cover 139B and the uneven part 139D function as a mechanism for preventing coming off.

[0250] A first relay electric wire 52, a second relay electric wire 53, and a hand switch electric wire 54 (FIG. 28) are connected to the control unit 13B. The configurations of these electric wires will be described later.

[0251] As shown in FIG. 28, the foot frame 14 has a pair of front and rear bars (FF vertical members) 140 extending in the front-rear direction and arranged at a predetermined interval in the left-right direction, and left and right bars (FF horizontal members) 141 provided at approximately the center of the front and rear bars 140 and connecting these front and rear bars 140.

[0252] A second engagement portion 142 is provided at the front end of each front-rear bar 140. The second engagement portion 142 is formed in a concave shape that opens toward the front, and engages to accommodate the rear protrusion 134B on the outer surface of each front-rear bar 130. Each front-rear bar 140 is formed with a through hole 143 that penetrates in the left-right direction.

[0253] The front side of the foot frame 14 is connected to the center frame 13. The front and rear bars 130 and the front and rear bars 140 are overlapped in a side view, the second engagement portions 142 are engaged with the rear protrusions 134B, and the knob bolts 41 are passed through the through holes 143 and screwed into the rear through holes 135B.

[0254] Next, the first motor electric wire 50, the second motor electric wire 51, the first relay electric wire 52, the second relay electric wire 53, and the hand switch electric wire 54 will be described with reference to FIGS.

[0255] Figure 30 is an oblique view of each electric wire 50, 51, 52, 53, (a) shows a state in which the motor electric wires 50, 51 and the relay electric wires 52, 53 are not connected to each other, and (b) shows a state in which the motor electric wires 50, 51 and the relay electric wires 52, 53 are connected to each other.

[0256] As shown in FIG. 30, the first motor electric wire 50 includes a cord 50A, a main connector 50B, and a female relay connector 50C. The main connector 50B is connected to one end of the cord 50A, and the relay connector 50C is connected to the other end of the cord 50A. The main connector 50B is connected to the first electric motor 118A. The female relay connector 50C is connected to a male relay connector 52C described later. The female relay connector 50C has a main body 50D and a cover 50E. The main body 50D has a rectangular parallelepiped shape with an opening 50f. The cover 50E is provided rotatably with respect to the main body 50D, and the cover 50E is rotated to a state in which a part of the cover 50E covers a part of the opening 50f as shown in FIG. 30(b) and a state in which the cover 50E is separated from the opening 50f and does not cover the opening 50f as shown in FIG. 30(a).

[0257] The first relay wire 52 includes a cord 52A, a main connector 52B, and a male relay connector 52C. The main connector 52B is connected to one end of the cord 52A, and the relay connector 52C is connected to the other end of the cord 52A. The main connector 52B is connected to the control unit 13B (see FIG. 29). The male relay connector 52C is inserted into and connected to the opening 50f of the female relay connector 50C. With the male relay connector 52C and the female relay connector 50C connected, the cover part 50E is rotated so that the opening 50f and the end face of the male relay connector 52C on the main connector 52B side are covered by the end wall constituting the cover part 50E. This prevents the male relay connector 52C from coming off the female relay connector 50C. The cover part 50E functions as a mechanism for preventing coming off.

[0258] The second motor electric wire 51 has a similar configuration to the first motor electric wire 50. That is, the second motor electric wire 51 includes a cord 51A, a main connector 51B, and a female relay connector 51C. The main connector 51B is connected to the second electric motor 125. The female relay connector 51C is connected to a male relay connector 53C, which will be described later. The female relay connector 51C includes a main body 51D and a cover 51E. The main body 51D is shaped like a rectangular parallelepiped having an opening 51f.

[0259] The second relay wire 53 has the same configuration as the first relay wire 52. That is, the second relay wire 53 includes a cord 53A, a main connector 53B, and a male relay connector 53C. The main connector 53B is connected to the control unit 13B (see FIG. 29). The male relay connector 53C is inserted into and connected to an opening 51f of the female relay connector 51C. The cover 51E prevents the male relay connector 53C from coming off the female relay connector 51C. The cover 51E functions as a mechanism for preventing coming off.

[0260] 28, the first motor electric wire 50 has a stretchable curl cord 50G as a part of a cord 50A. At least one point of the cord 50A is fixed to the base frame 11. In this embodiment, at least one point of the cord 50A is fixed to the rear of the front and rear bars 110 of the base frame 11 by a cord clip (not shown).

[0261] At least one point of the cord 51A of the second motor electric wire 51 is fixed to the head frame 12. In this embodiment, at least one point of the cord 51A is fixed to the outer surface (upper surface, lower surface, side surface) of the front-rear bar 120 of the head frame 12 by a cord clip (not shown). As a result, the cord 51A is arranged to extend from the second electric motor 125 to the front-rear bar 120 and extend rearward along the front-rear bar 120.

[0262] At least one point of the cord 52A of the first relay wire 52 is fixed to the center frame 13. In this embodiment, at least one point of the cord 52A is fixed to the outer surface (upper surface, lower surface, side surface) of the front-rear bar 130 of the center frame 13 by a cord clip (not shown). As a result, the cord 52A is arranged to extend from the control portion 13B to the front-rear bar 130 and extend rearward along the front-rear bar 130.

[0263] At least one point of the cord 53A of the second relay wire 53 is fixed to the center frame 13. In this embodiment, at least one point of the cord 53A is fixed to the outer surface (upper surface, lower surface, side surface) of the front-rear bar 130 of the center frame 13 by a cord clip (not shown). As a result, the cord 53A is arranged to extend from the control portion 13B to the front-rear bar 130 and extend forward along the front-rear bar 130.

[0264] When the base frame 11, the head frame 12, the center frame 13, and the foot frame 14 are assembled, the female relay connector 50C of the first motor electric wire 50 and the male relay connector 52C of the first relay electric wire 52 are configured to be positioned in close proximity to each other so as to be connectable to each other, and the female relay connector 51C of the second motor electric wire 51 and the male relay connector 53C of the second relay electric wire 53 are configured to be positioned in close proximity to each other so as to be connectable to each other.

[0265] The first motor electric wire 50, the second motor electric wire 51, the first relay electric wire 52, and the second relay electric wire 53 are fixed to each frame by cord clips so that when the movable mechanism (X-link mechanism 11B and arm mechanism 12B) is moved while they are connected to each other, they will not be pinched or pulled too hard, causing breakage.

[0266] The hand switch electric wire 54 includes a cord 54A, a main connector (not shown), and two relay connectors (not shown). The main connector (not shown) is connected to one end of the cord 54A. The cord 54A has one wire extending from the main connector (not shown) and two branch wires branching from the one wire. The two relay connectors (not shown) are connected to the ends of the two branch wires. At least one point of one of the branch wires is fixed to the front-rear bar 130 of the center frame 13 on one side in the width direction relative to the control unit 13B. At least one point of the other of the branch wires is fixed to the front-rear bar 130 of the center frame 13 on the other side in the width direction relative to the control unit 13B. A hand switch 2 can be connected to each relay connector of the hand switch electric wire 54.

[0267] As described above, according to the electric bed 1, the first motor electric wire 50 is fixed at least at one point to the rear of the front-rear bar 110 of the base frame 11, and the first relay electric wire 52 is fixed at least at one point to the outer surface of the front-rear bar 130 of the center frame 13. When the base frame 11 and the center frame 13 are assembled, the female relay connector 50C provided at the end of the first motor electric wire 50 and the male relay connector 52C provided at the end of the first relay electric wire 52 are positioned in such a proximity that they can be connected to each other, and even if the X-link mechanism 11B (movable mechanism) is moved with the female relay connector 50C and the male relay connector 52C connected, the first motor electric wire 50 and the first relay electric wire 52 are arranged so that breaks do not occur.

[0268] As a result, when assembling the electric bed 1, there is no need to check the instruction manual, etc., and secure the electric wires to the frame with cord clips or route them along a specified path to prevent the electric wires from being pinched by the movable mechanism. In other words, the electric bed 1 prevents incorrect wiring and reduces the wiring work, so the assembly work of the electric bed 1 can be simplified and the burden on the worker can be significantly reduced.

[0269] In addition, with regard to the second motor electric wire 51 and the second relay electric wire 53, when the head frame 12 and the center frame 13 are assembled, the female relay connector 51C provided at the end of the second motor electric wire 51 and the male relay connector 53C provided at the end of the second relay electric wire 53 are located in such a position that they can be connected to each other, and even if the arm mechanism 12B (movable mechanism) is moved with the female relay connector 51C and the male relay connector 53C connected, disconnection does not occur in the second motor electric wire 51 and the second relay electric wire 53. Therefore, the second motor electric wire 51 and the second relay electric wire 53 also have the same effect as the first motor electric wire 50 and the first relay electric wire 52.

[0270] A part of the first motor electric wire 50 is configured with a curl cord 50G. This makes it possible to prevent the first motor electric wire 50 from sagging and touching the floor, and even if the first motor electric wire 50 is pulled by driving the X-link mechanism 11B (movable mechanism), the curl cord 50G stretches, making it possible to prevent the first motor electric wire 50 from being broken.

[0271] The cover 50E of the first motor electric wire 50 is configured to rotate to cover the end face of the male relay connector 52C when the male relay connector 52C and the female relay connector 50C are connected. This prevents the male relay connector 52C from coming out of the female relay connector 50C due to a user accidentally getting caught on the electric wire. This prevents the first motor electric wire 50 from coming out of connection with the first relay electric wire 52, causing the electric bed 1 to stop moving.

[0272] Cord 54A has one line extending from a main connector (not shown) and two branch lines branching off from the single line. At least one point of one of the branch lines is fixed to front-rear bar 130 of center frame 13 on one side in the width direction relative to control unit 13B. At least one point of the other branch line is fixed to front-rear bar 130 of center frame 13 on the other side in the width direction relative to control unit 13B.

[0273] This allows the hand switch 2 to be placed on the side desired by the user. Since the branch line is fixed to the center frame 13, there is no need to route the branch line after assembling the electric bed 1. This simplifies the assembly work of the electric bed 1 and reduces the burden on the worker.

[0274] In the above embodiment, the first electric motor 118A corresponds to the first electric device, the second electric motor 125 corresponds to the first electric device, the control unit 13B corresponds to the second electric device, the first motor electric wire 50 and the second motor electric wire 51 correspond to the first electric wire, the first relay electric wire 52 and the second relay electric wire 53 correspond to the second electric wire, the female relay connector 50C and the female relay connector 51C correspond to the first connector, the male relay connector 52C and the male relay connector 53C correspond to the second connector, and the frame unit 10 corresponds to the bed frame, but this is not limited to the above embodiment. The present invention is not limited to the above embodiment, and a person skilled in the art can make various additions, modifications, etc. within the scope of the present invention.

[0275] For example, in the above example, the base frame (BF) 11 is provided with the first actuator 11C for driving the X-link mechanism 11B, and the head frame (HF) 12 is provided with the second actuator 12C for driving the back bottom 21, but the present invention is not limited to this. For example, the foot frame (FF) 14 may have an actuator for driving the knee bottom 23 or the leg bottom 24, and the center frame (CF) 13 may have an actuator for driving the X-link mechanism 11B, etc. Any of the frames such as BF11, HF12, CF13, and FF14 may be provided with actuators for driving various components included in the electric bed 1. Each actuator has an electric motor and a rod that is freely moved forward and backward by the electric motor, as in the above example, and a motor wire may be connected to each electric motor. Note that components other than the frame that constitute the electric bed 1 may also have similar actuators.

[0276] Also, for example, in the above example, the control unit 13B, and the relay wire 52 (53) and the hand switch wire 54 connected to the control unit 13B are connected to the CF 13, but this is not limited thereto. The control unit, the relay wire, and the hand switch wire may be provided on a frame (BF11, HF12, FF14) other than the CF 13. Also, they may be provided on various components included in the electric bed 1 other than the frame.

[0277] Further, in the above examples, the movable mechanism has been described using a lifting mechanism (X-link mechanism), a raising and lowering mechanism (arm mechanism), etc. as examples, but the present invention is not limited to these and may be any movable mechanism.

[0278] Fig. 31 is an explanatory diagram of the wiring paths of the electric wires 50, 51, 52, and 53 according to a modified example. In Fig. 31, the hand switch electric wire 54 is not shown.

[0279] The wiring paths of the first motor electric wire 50, the second motor electric wire 51, the first relay electric wire 52, and the second relay electric wire 53 may be as shown in Fig. 31. That is, the cord 50A of the first motor electric wire 50 is fixed at least at one point to the first rod 118B by a cord clip (not shown) and is disposed along the first rod 118B. The cord 52A of the first relay electric wire 52 extends rearward from the control unit 13B and is fixed to the left and right bars 131 on the rear side.

[0280] The second relay electric wire 53 is arranged along a first stay 61 provided on the center frame 13. The first stay 61 is fixed to a support portion that supports the control portion 13B, and is composed of a portion extending forward, a portion extending obliquely upward from the end of the first stay 61, and a portion extending forward from the end of the first stay 61. A cord 53A of the second relay electric wire 53 extends from the control portion 13B and extends along the first stay 61 to near its front end. The second motor electric wire 51 is arranged along a second stay 60 provided on the head frame 12. The second stay 60 is fixed to the left and right bars 121 on the rear side, and is composed of a portion extending forward, a portion extending obliquely downward from the end of the first stay 61, and a portion extending forward from the end of the second stay 61 to near the second electric motor 125. A cord 51A of the second motor electric wire 51 extends from the second electric motor 125 and extends along the second stay 60 to near its rear end.

[0281] As in the above embodiment, when the base frame 11, the head frame 12, the center frame 13, and the foot frame 14 are assembled, the female relay connector 50C of the first motor electric wire 50 and the male relay connector 52C of the first relay electric wire 52 are located in a mutually connectable vicinity, and the female relay connector 51C of the second motor electric wire 51 and the male relay connector 53C of the second relay electric wire 53 are located in a mutually connectable vicinity. Even if the X-link mechanism 11B (movable mechanism) is moved with the female relay connector 50C and the male relay connector 52C connected, the first motor electric wire 50 and the first relay electric wire 52 are not disconnected, and even if the arm mechanism 12B (movable mechanism) is moved with the female relay connector 51C and the male relay connector 53C connected, the second motor electric wire 51 and the second relay electric wire 53 are not disconnected. Therefore, in this modified example, the same effect as that of the electric bed 1 of the above embodiment can be achieved.

[0282] In addition, when the base frame 11, the head frame 12, the center frame 13, and the foot frame 14 are assembled, the female relay connector 50C of the first motor electric wire 50 and the male relay connector 52C of the first relay electric wire 52 may be configured to be connected to each other simultaneously during assembly, and the female relay connector 51C of the second motor electric wire 51 and the male relay connector 53C of the second relay electric wire 53 may be configured to be connected to each other simultaneously during assembly.

[0283] FIG. 32 is a perspective view of the first motor electric wire 50 according to a modified example, where (a) shows a state in which the cover part 50E is open, and (b) shows a state in which the cover part 50E is closed.

[0284] The cover part 50E of the first motor electric wire 50 functions as a mechanism for preventing the electric wire from coming off, but the cover part 50E may also function as a waterproof mechanism for preventing water from entering the inside of the main body part 50D. In this case, as shown in FIG. 32(a), an oval hole 50g is formed in the cover part 50E, and a protrusion 50H provided on the main body part 50D is inserted into the oval hole 50g. The cover part 50E is rotated to cover the opening 50f, and the cover part 50E is slid toward the cord 50A side, so that the sealing member 50J provided on the cover part 50E seals the opening 50f (FIG. 32(b)). This makes it possible to prevent water from entering the main body part 50D when the electric bed 1 is disassembled and washed. Alternatively, a rectangular annular packing may be fitted to opening 50f of main body 50D, and when male relay connector 52C is inserted into main body 50D, the packing may be fitted tightly to male relay connector 52C to prevent water from entering main body 50D. This makes it possible to prevent water from entering main body 50D even when female relay connector 50C and male relay connector 52C are connected.

[0285] The main connector 50B of the first motor electric wire 50 may be configured to have both a disconnection prevention mechanism and a waterproof mechanism. The main connector 51B of the second motor electric wire 51 may be configured to have a disconnection prevention mechanism and / or a waterproof mechanism. The main connector 52B of the first relay electric wire 52 and the main connector 53B of the second relay electric wire 53 may be configured to have a waterproof mechanism.

[0286] Although the first motor electric wire 50 has the stretchable curl cord 50G as a part of the cord 50A, for example, as shown in Fig. 33, the cord 53A of the second relay electric wire 53 may have a curl cord 53D. Similarly, the second motor electric wire 51 and the first relay electric wire 52 may have curl cords.

[0287] 34, the cord 53A of the second relay electric wire 53 may have a winding section 53E that automatically winds and accommodates the cord 53A, instead of the curl cord 53D. This can prevent the second relay electric wire 53 from sagging, and can prevent a user from getting caught on the cord 53A. Furthermore, even if the second relay electric wire 53 is pulled by driving the arm mechanism 12B (movable mechanism), the cord 53A in the winding section 53E is pulled out, so that the second relay electric wire 53 can be prevented from being damaged or broken. Similarly, the first motor electric wire 50, the second motor electric wire 51, and the first relay electric wire 52 may have winding sections.

[0288] As shown in FIG. 35, the second motor electric wire 51 and the second relay electric wire 53 may be configured by a single electric wire 151. The electric wire 151 includes a cord and two main connectors connected to both ends of the cord. One of the main connectors is connected to the control unit 13B of the center frame 13 before assembly. At least one point of the cord of the electric wire 151 may be fixed to the front and rear bars 130 of the center frame 13. The remaining part of the electric wire 151 is bundled. Then, when the head frame 12 and the center frame 13 are assembled, the other main connector is connected to the second electric motor 125.

[0289] This configuration can prevent the worker from inserting the main connector of the electric wire 151 into the wrong socket of the control unit 13B. This can simplify the assembly work of the electric bed 1 and reduce the burden on the worker.

[0290] In this modified example, at least one point of the cord of the electric wire 151 is fixed to the front-rear bar 130 of the center frame 13, but it does not have to be fixed to the front-rear bar 130. A part of the electric wire 151 may be configured as a curled cord, and the electric wire 151 may be provided with a winding section that automatically winds and stores the cord.

[0291] The cord 50A of the first motor wire 50 may be passed through the inside of the base frame 11, the cord 50A of the second motor wire 51 may be passed through the inside of the head frame 12, the cord 50A of the first relay wire 52 may be passed through the inside of the center frame 13, and the cord 50A of the second relay wire 53 may be passed through the inside of the center frame 13.

[0292] The first and second motor electric wires 50 and 51 have female relay connectors 50C and 51C, and the first and second relay electric wires 52 and 53 have male relay connectors 52C and 53C, but the first and second motor electric wires 50 and 51 may have male relay connectors 52C and 53C, and the first and second relay electric wires 52 and 53 may have female relay connectors 50C and 51C. Although the cover part 50E is provided on the first motor electric wire 50 as a waterproofing mechanism, a cover part having a waterproofing mechanism may be provided on the first relay electric wire 52. In addition, caps may be inserted into the multiple plugs (connectors) of the main body 139A of the control unit 13B when the electric bed 1 is disassembled and washed. The caps may be provided detachably on the cover 139B, or may be provided as separate parts. This makes it possible to prevent water from entering the inside of the plugs during washing.

[0293] As described above, in this modification as in the present embodiment, any of the frames BF11, HF12, CF13, FF14, etc., or other components may be provided with actuators for driving various components included in the electric bed 1. The control unit, relay wires, and hand switch wires may be provided in any of the frames BF11, HF12, CF13, FF14, etc., or other components. The movable mechanism is not limited to a lifting mechanism, a standing mechanism, etc., and may be any movable mechanism.

[0294] The above-described embodiments are merely examples for the purpose of explanation, and the scope of the present invention is not limited to these embodiments. The present invention can be embodied in various forms other than the above-described embodiments. Naturally, one bed may have one or more of the configurations described in the above-described embodiments, modifications, and the like. [Explanation of symbols]

[0295] (First and second embodiments) 1...Bed 2...Main frame 3...Bottom 4...Head frame 5...Center frame 6...Foot frame 7...Base frame 8...Board 31...Back bottom 31A...High back bottom 31B...Low back bottom 31C...Connecting shaft 32...Waist bottom 33...Knee leg bottom 33A...Upper leg bottom 33B...Lower leg bottom 33C...Connecting shaft 41...HF vertical member 42...HF engagement part 43HF hole 44...Fixing member 46...Alignment member 47...Option mounting part 48...Pin-shaped part 49...HF horizontal member 51...CF vertical member 51F...Mounting member 52...Guide part 53...Axis holding part 53a...Opening 55...End 55a...Hole 56...CF rear projection 57...CF front projection 58CF hole 59...CF horizontal member 61...FF vertical member 62...FF engagement part 69...FF horizontal member 71...base 72...X link mechanism 116... 117...actuator 122...actuator 122b...rod 123...bracket 124...pin 125...rotating bar 126...arm 127...back-raising bar 128...bar 133...back-leg interlocking link 134...leg-raising bar 135...connecting portion 710...BF vertical member 712...leg 714...fixed leg 716...BF horizontal member 718...guide member 721...first link 723...second link 725...link fixing portion 727...connecting rod 728...connecting rod 727H...front end of first link 727F...rear end of first link 728H...front end of second link 728F...rear end of second link 1053...shaft holding portion 1054...accommodating portion 1055: upper piece portion 1055a: first hole 1056: lower piece portion 1056a: second hole 1060: locking member 1061: main body 1062: mounting shaft 1063: handle portion 1064: locking piece 1064a: tip portion 1064b: front surface 1064c: rear surface 1718: guide member 1729: guide end 1730: guide end 2060: locking member 2061: main body 2062: mounting shaft 2063: handle portion 2064: locking piece 2064a: tip portion 2064b: front surface 2064c: rear surface Third embodiment 1: electric bed, 2: hand switch, 10 frame section (bed frame), 11: base frame, 11B: X-link mechanism, 12: head frame, 12B: arm mechanism, 13: center frame, 13B: control section, 50: first motor electric wire, 51: second motor electric wire, 50C, 51C: female relay connector, 50E, 51E: cover section, 52: first relay electric wire, 53: second relay electric wire, 52C, 53C: male relay connector (, 50G, 53D: curl cord, 53E: winding section, 54: hand switch electric wire, 118A: first electric motor, 125: second electric motor, 139B: cover, 139D: uneven section, 151: electric wire

Claims

1. A bed that can be disassembled into a plurality of parts and is completed by combining and connecting the plurality of parts in a predetermined relative position, The plurality of components include a first component, a second component, and a third component that constitute a frame that supports the bottom, a first coupling device is provided on the third component for coupling the first component and the second component so as not to come apart; the first coupling is disposed at a specific position of the third part so that the first coupling automatically couples the first part and the second part in a state in which they do not come apart when the first part, the second part, and the third part are assembled in a predetermined relative position; The first part is a base frame that raises and lowers the bed, the second part is a first main frame element that constitutes a main frame supported by the base frame, and the third part is a second main frame element that constitutes the main frame. bed.

2. a first engaging portion provided on the first part and a second engaging portion provided on the second part are engaged with each other, so that the first part and the second part are assembled at the predetermined relative position; 2. The bed of claim 1.

3. The first main frame element is a center frame supported by the base frame, and the second main frame element is a head frame or a foot frame connected to the center frame.

2. The bed of claim 1.

4. a first engaging portion provided on the first part and a second engaging portion provided on the second part are engaged with each other, so that the first part and the second part are assembled at the predetermined relative position; 4. A bed as claimed in claim 3.

5. the second engagement portion is capable of receiving the first engagement portion and has an opening for inserting the first engagement portion; The first coupling has a means for blocking the opening of the second engagement portion.

5. A bed as claimed in claim 4.

6. the first engagement portion is a contact portion provided on the base frame so as to contact the center frame in order to raise and lower the bed, the second engagement portion is a holding portion having the opening and configured to accommodate and hold the abutment portion, The first fastener is provided on the head frame so as to close a part or all of the opening so that the abutting portion does not come off the holding portion when the center frame and the head frame are combined at the predetermined relative position.

6. A bed as claimed in claim 5.

7. The holding portion is open downward, the first fastener is a pin-shaped member and is provided at the specific position of the head frame or the foot frame along the longitudinal direction of the bed; When the bed is assembled in the predetermined relative position, the pin-shaped member is inserted into a hole that penetrates the bed in the longitudinal direction at the lower end of the holding portion.

7. A bed as claimed in claim 6.

8. The holding portion is open toward the center or end of the bed in the longitudinal direction, The first fastener is a pin-shaped member and is provided at the specific position of the head frame or the foot frame facing downward, When the center frame and the head frame are assembled in the predetermined relative position, the pin-shaped member is inserted into a hole that is provided in the holding portion and penetrates in the up-down direction.

7. A bed as claimed in claim 6.

9. The holding portion has the opening and an opening / closing portion that opens and closes the opening, The first fastener has a pressing member for pressing the opening / closing portion, When the center frame and the head frame are assembled in the predetermined relative position, the opening / closing part is pressed by the pressing member to close the opening.

7. A bed as claimed in claim 6.

10. The third part or the second part further includes a second coupling for maintaining a position of the first coupling in a position where the first part and the second part are connected so as not to be separated. A bed according to any one of claims 1 to 9.

11. the second coupling is configured to secure the third component and the second component to one another; 11. A bed as claimed in claim 10.

12. The bed includes one or more legs that can be connected and separated from the base frame in a one-touch manner. A bed according to any one of claims 1 to 11.

13. The bed includes a plurality of bottom elements constituting the bottom, The frame has a first bottom drive mechanism for moving a first bottom of the plurality of bottom elements; At least one bottom element of the frame or the plurality of bottom elements has a second bottom link for linking a second bottom of the plurality of bottom elements to a first bottom, The first bottom drive mechanism and the second bottom interlocking link are configured to be connectable and disconnectable in a one-touch manner. A bed according to any one of claims 1 to 12.

14. A first frame which is either the base frame or the first main frame element has a first electric device and a first movable mechanism driven by the first electric device, a second frame, which is the other of the base frame or the first main frame element, has a second electric device electrically connectable to the first electric device and for driving the first movable mechanism; A first electric wire is connected to the first electric device, A second electric wire is connected to the second electric device, The first electric wire is fixed at least at one point to the first frame, The second electric wire is fixed to the second frame at at least one point, when the first frame and the second frame are assembled, a first connector provided at an end of the first electric wire and a second connector provided at an end of the second electric wire are located in a vicinity so as to be connectable to each other, and the first electric wire and the second electric wire are arranged so as not to be broken even if the first movable mechanism is moved in a state in which the first connector and the second connector are connected. A bed according to any one of claims 1 to 13.

15. The second mainframe element has a third electric device and a second movable mechanism driven by the third electric device; the first mainframe element has a fourth electrical device electrically connectable with the third electrical device for driving the second movable mechanism; a third electric wire is connected to the third electric device; A fourth electric wire is connected to the fourth electric device, the third electric wire is fixed at least at one point to the second main frame element; the third electric wire is fixed at least at one point to the first main frame element; when the second main frame element and the first main frame element are assembled, a third connector provided on an end of the third electric wire and a fourth connector provided on an end of the fourth electric wire are located in such a proximity that they can be connected to each other, and the third electric wire and the fourth electric wire are arranged not to be broken even if the second movable mechanism is moved in a state in which the third connector and the fourth connector are connected. A bed according to any one of claims 1 to 14.

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