JP7398079B2 - bed - Google Patents

Description

The present invention relates to a bed that can be assembled and disassembled.

Some beds can be assembled and disassembled to make them easier to transport. As such a bed, for example, there is a technique disclosed in Patent Document 1. In the bed disclosed in Patent Document 1, a stopper that restrains a boss that is locked to a hook-shaped member and releases the boss in a detachable manner is moved between a position where the boss is restrained and a position where the boss is restrained by the urging force of a coil spring. The stopper has a first arm portion extending around a shaft stop, a second arm portion, and a lever portion, and the stopper has a first arm portion and a lever portion. The distance between the second arm and the second arm is smaller than the diameter of the boss and narrower than the inner recess of the hook-shaped member. It is configured to protrude into the inner recess.

Patent No. 2868119

However, in the technology disclosed in Patent Document 1, the stopper that restrains the boss that is engaged with the hook-shaped member or releasably releases the boss is moved to a position where the boss is restrained by the biasing force of a coil spring. Because it is rotatable to bring it to the open position, it has a large number of parts and a complicated configuration.

An object of the present invention is to provide a bed that can simplify the configuration of an engagement mechanism used for assembly and disassembly.

In order to achieve the above-mentioned object, a bed according to one aspect includes a first member and a second member attached to the first member, a receiving part fixed to the first member, and a bed fixed to the first member, and a bed according to one aspect. and an engaging part that is rotatably supported by a member and can be engaged with the receiving part based on rotational movement due to its own weight.

Here, the engaging portion can shift to a locked state in which the receiving portion is locked based on a rotational movement based on its own weight. This makes it possible to lock the receiving part to the engaging part simply by placing the second member on the first member, and even when the second member is lifted, the engaging part comes off from the receiving part. You can avoid it. Therefore, it is possible to eliminate the need for a stopper to prevent the engaging part from coming off the receiving part when the second member is lifted, and the structure of the engaging mechanism between the first member and the second member can be reduced. It becomes possible to simplify the assembly work of the first member and the second member.

Further, the engaging portion can shift to a state in which the receiving portion can be locked based on a rotational movement based on the pressure applied to the engaging portion. Thereby, the receiving part can be locked to the engaging part simply by bringing the engaging part close to the receiving part. Therefore, simply by lowering the second member over the first member, it becomes possible to lock the receiving part to the engaging part, and the assembly work of the first member and the second member can be simplified. .

Further, the engaging portion can release the locked state based on a rotational movement from the locked state in which the receiving portion is locked. Thereby, the engaging portion can be removed from the receiving portion simply by rotating the engaging portion, and the engaging portion can be shifted to the locked state again based on the rotational movement based on its own weight. Therefore, it is possible to simplify the disassembly work of the first member and the second member, and it is also possible to reduce the effort required to reassemble the first member and the second member.

FIG. 1(a) is a perspective view showing the state before assembly of the bed member according to the first embodiment, and FIG. 1(b) is a perspective view showing the state after assembly of the bed member according to the first embodiment. FIG. 1(c) is a side view showing an enlarged portion of region RA in FIG. 1(b). 2(a) to 2(f) are side views showing the relationship between the position of the pin and the rotational position of the hook until the pin of FIG. 1(c) is engaged with the hook. 3(a) to 3(f) are side views showing the relationship between the pin position and the rotational position of the hook when the hook is released from the locked state and re-locked in FIG. 1(c). FIGS. 4(a) to 4(d) are side views showing an example of the configuration of a restraining portion that restrains the bed member from shifting when the hook of FIG. 1(c) is in the locked state. FIG. 5 is a perspective view showing a state before assembly of the bed member according to the second embodiment. FIG. 6(a) is a perspective view showing the positional relationship between the insertion hole and the hook before assembly of the bed member according to the second embodiment, and FIG. 6(b) is a perspective view of the bed member according to the second embodiment. FIG. 3 is a perspective view showing the positional relationship between the insertion hole and the hook after assembly. FIG. 7(a) is a perspective view showing the state before assembly of the bed member according to the third embodiment, and FIG. 7(b) is a perspective view showing the state after assembly of the bed member according to the third embodiment. 7(c) is a side view showing an enlarged portion of region RB in FIG. 7(b). 8(a) to 8(c) are enlarged perspective views showing the relationship between the position of the pin and the rotational position of the hook from the locked state to the released state of the hook shown in FIG. 7(b).

Embodiments will be described with reference to the drawings. The embodiments described below do not limit the claimed invention, and all of the elements and combinations thereof described in the embodiments are essential to the solution of the invention. Not necessarily.

FIG. 1(a) is a perspective view showing the state before assembly of the bed member according to the first embodiment, and FIG. 1(b) is a perspective view showing the state after assembly of the bed member according to the first embodiment. FIG. 1(c) is a side view showing an enlarged portion of region RA in FIG. 1(b).

In FIGS. 1(a) to 1(c), the bed includes a base frame F1 and a center frame F2 as bed members. The center frame F2 can be mounted on the base frame F1 and can be moved up and down on the base frame F1. The base frame F1 and the center frame F2 can be made of metal such as stainless steel or aluminum, for example.

A head frame can be attached to the front end of the center frame F2. A foot frame can be attached to the rear end of the center frame F2. The head frame and foot frame are movable up and down on the base frame F1 together with the center frame F2. The center frame F2, head frame, and foot frame support a bottom that can form the floor surface of the bed. A headboard can be vertically attached to the front end of the head frame. A footboard can be vertically attached to the rear end of the foot frame.

The base frame F1 includes horizontal frame members 11A and 11B. The horizontal frame members 11A and 11B are connected to each other via connecting members 12A and 12B. Brackets 13A and 13B are attached to the inner wall surfaces of the horizontal frame members 11A and 11B.

Further, the base frame F1 supports link members 14A and 14B. The lower front end of each link member 14A, 14B is connected to a slide arm 15A. The lower rear end of each link member 14A, 14B is connected to the connecting member 12B. The upper front end of each link member 14A, 14B is connected to a lifting arm 15C. The upper rear end of each link member 14A, 14B is connected to a lifting arm 15B.

The center frame F2 includes horizontal frame members 21A and 21B. The horizontal frame members 21A and 21B are connected to each other via connecting members 22A and 22B. Brackets 23A and 23B are attached to the inner wall surfaces of the horizontal frame members 21A and 21B.

Both ends of the slide arm 15A can be inserted into the brackets 13A and 13B, respectively. Both ends of the lifting arm 15C can be inserted into the brackets 23A and 23B, respectively.

Pins 16A and 16B are fixed to both ends of the connecting member 12B, respectively. Hooks 26A and 26B are rotatably supported on the outer wall surfaces of the horizontal frame members 21A and 21B, respectively. The hooks 26A and 26B can be formed, for example, by punching, cutting, or casting metal plates such as stainless steel.

The hooks 26A, 26B are arranged on the center frame F2 so that the pins 16A, 16B are located under each hook 26A, 26B when the center frame F2 is attached to the base frame F1. Here, each hook 26A, 26B is provided with a rotation shaft 28A, 28B serving as a center of rotation during rotation. Further, shaft support parts 25A and 25B that support the respective rotation shafts 28A and 28B are fixed on each of the horizontal frame members 21A and 21B.

Note that the rotating shafts 28A, 28B are fixed to the shaft supports 25A, 25B, and when inserted into the through holes provided in the hooks 26A, 26B, the hooks 26A, 26B rotate with respect to the rotating shafts 28A, 28B. The configuration may be such that Alternatively, the rotating shafts 28A, 28B may be fixed to the hooks 26A, 26B, and the rotating shafts 28A, 28B may rotate together with the hooks 26A, 26B with respect to the shaft supports 25A, 25B.

Grooves 24A and 24B into which pins 16A and 16B can be inserted, respectively, are provided on the lower surface of each horizontal frame member 21A and 21B. The width of each groove 24A, 24B can correspond to the diameter of each pin 16A, 16B. Each groove 24A, 24B prevents each pin 16A, 16B from moving in the length direction of the base frame F1 by fitting into each other with the pin 16A, 16B. Therefore, the grooves 24A and 24B can prevent horizontal displacement between the base frame F1 and the center frame F2 when the pins 16A and 16B are locked by the hooks 26A and 26B. .

When installing the center frame F2 on the base frame F1, the operator inserts both ends of the slide arm 15A into the brackets 13A and 13B, and then attaches the base frame so that the pins 16A and 16B are located below the hooks 26A and 26B. Hold the center frame F2 on F1.

Then, the operator lowers the center frame F2 and inserts both ends of the lifting arm 15C into the brackets 23A and 23B, respectively. Further, with each pin 16A, 16B inserted into the groove 24A, 24B, the operator rotates each hook 26A, 26B based on the pressure exerted by each pin 16A, 16B. At this time, each hook 26A, 26B is tilted forward until it can lock each pin 16A, 16B. When each hook 26A, 26B is rotated until it can lock each pin 16A, 16B, it rotates to its original position due to its own weight and locks each pin 16A, 16B.

Here, when each pin 16A is locked by each hook 26A, 26B, each pin 16A will be in a state of being hooked by each hook 26A, 26B. Therefore, even when the center frame F2 is lifted, the hooks 26A and 26B can be prevented from coming off the pins 16A and 16B, and the integrity of the base frame F1 and the center frame F2 can be maintained. can.

Moreover, each pin 16A, 16B is locked by each hook 26A, 26B in the state inserted into groove|channel 24A, 24B, and the rotational movement of each hook 26A, 26B is suppressed. Therefore, when each pin 16A, 16B is locked with each hook 26A, 26B, each hook 26A, 26B can be prevented from swinging, and the center frame F2 can be prevented from wobbling in the length direction. can be prevented.

Furthermore, each of the hooks 26A, 26B can release the locked state based on a rotational movement from the locked state in which each pin 16A, 16B is locked. As a result, by simply rotating each hook 26A, 26B, it is possible to release each pin 16A, 16B from the hooked state on each hook 26A, 26B, and also to rotate each hook 26A, 26B based on its own weight. Based on the movement, each pin 16A, 16B can be re-transitioned to a state where it is hooked to each hook 26A, 26B. Therefore, it is possible to simplify the disassembly work of the base frame F1 and the center frame F2, and it is also possible to reduce the effort required to reassemble the base frame F1 and the center frame F2.

2(a) to 2(f) are side views showing the relationship between the position of the pin and the rotational position of the hook until the pin of FIG. 1(c) is engaged with the hook. In the following description, the hook 26A in FIG. 1(a) will be taken as an example, but the same applies to the hook 26B.

In FIG. 2(a), the hook 26A is rotatably supported via a rotating shaft 28A. The hook 26A is rotatable through 360° about the rotating shaft 28A as a rotational fulcrum while keeping the direction of its side surface constant. The center of gravity G of the hook 26A is set at a position where the hook 26A is stable when the hook 26A is in the locked state. At this time, when the hook 26A is in a stable state, the center of gravity G is located on the vertical line LV passing through the center of the rotating shaft 28A.

The hook 26A includes a locking surface 27A that locks the pin 16A, and an inclined surface 30A on which the pin 16A can slide. The inclined surface 30A forms an acute angle with the locking surface 27A through the tip of the locking surface 27A. The inclined surface 30A extends to the lower end 29A of the hook 26A. The inclined surface 30A may be flat, a concave curved surface, or a convex curved surface. At this time, the hook 26A can be configured such that the vertical line LV is located between the lower end 29A of the hook 26A and the tip of the locking surface 27A.

The pin 16A is then locked with a hook 26A. In this case, as shown in FIG. 2(b), the hook 26A is lowered with the pin 16A on the vertical line LV, and the hook 26A approaches the pin 16A, thereby bringing the pin 16A into contact with the inclined surface 30A. .

Next, as shown in FIG. 2(c), when the hook 26A is further lowered with the pin 16A on the vertical line LV, the inclined surface 30A is pressed by the pin 16A, and the hook 26A is tilted forward. The hook 26A rotates.

Next, as shown in FIG. 2(d), when the hook 26A is further lowered with the pin 16A on the vertical line LV, the hook 26A is further tilted forward, and the pin 16A is attached to the tip of the locking surface 27A. To position. At this time, the hook 26A transitions to a state in which the pin 16A can be received by the locking surface 27A.

Next, as shown in FIG. 2(e), when the hook 26A is further lowered with the pin 16A on the vertical line LV, the hook 26A rotates in the direction of returning to its original position due to its own weight, and the pin 16A is received in the locking surface 27A.

Next, as shown in FIG. 2(f), when the hook 26A is further lowered with the pin 16A on the vertical line LV, the hook 26A further rotates in the direction of returning to its original position due to its own weight, and It is stabilized at a position where the center of gravity G is on the line LV. At this time, the hook 26A locks the pin 16A with the locking surface 27A and shifts to the locked state.

In addition, in FIGS. 2(a) to 2(f), an example is shown in which the hook 26A is lowered with the pin 16A located on the vertical line LV, but the pin 16A is located at the tip of the hook 26A rather than the vertical line LV. The hook 26A may be lowered while being at a position shifted in the direction 27A. In this case, the lower end 29A of the hook 26A may be located on the tip side of the locking surface 27A with respect to the vertical line LV.

3(a) to 3(f) are side views showing the relationship between the pin position and the rotational position of the hook when the hook is released from the locked state and re-locked in FIG. 1(c).
In FIG. 3A, it is assumed that the hook 26A is in a locked state in which the pin 16A is locked with the locking surface 27A.

Then, it is assumed that the pin 16A is released from the locked state in which it is locked by the locking surface 27A. In this case, as shown in FIG. 3(b), the hook 26A is rotated while the pin 16A is on the vertical line LV, and the inclined surface 30A is separated from the pin 16A.

Next, as shown in FIGS. 3(c) to 3(e), the hook 26A is further rotated while the pin 16A is on the vertical line LV, and the back surface of the hook 26A is brought into contact with the pin 16A. At this time, the hook 26A can be raised along the vertical line LV without being hindered by the pin 16A. Therefore, the operator can raise the center frame F2 without raising the base frame F1 in FIG. 1(a), and can separate the center frame F2 from the base frame F1.

As shown in FIG. 3(f), by rotating the hook 26A in the original direction from the unlocked state of the hook 26A in FIG. 3(e), the pin 16A can be reattached to the hook 26A. Therefore, the effort required to reassemble the base frame F1 and center frame F2 in FIG. 1(a) can be reduced.

FIGS. 4(a) to 4(d) are side views showing an example of the configuration of a restraining portion that restrains the bed member from shifting when the hook of FIG. 1(c) is in the locked state. FIGS. 4(a) to 4(d) each show four configuration examples of the suppressing section.

In FIG. 4(a), a pin 16AM can be used instead of the pin 16A in the base frame F1 of FIG. 1(a). Pin 16AM can be constructed from a magnet. Here, the north and south poles of the magnet are placed at a position where pin 16AM and hook 26A attract each other. At this time, the hook 26A may be made of a magnetic material such as iron or stainless steel.

Thereby, when the pin 16A is locked by the hook 26A, the hook 26A can be attracted to the pin 16A, and the swinging of the hook 26A can be suppressed.

In FIG. 4(b), a magnet 31 is embedded in the wall surface of the horizontal frame member 21A of FIG. 1(a). The magnet 31 is arranged at a position where it attracts the hook 26A when the pin 16A is in a locked state locked by the locking surface 27A. Further, the magnet 31 can be placed at a position where it does not interfere with the rotational movement of the hook 26A and the pressing movement of the inclined surface 30A with the pin 16A. At this time, the hook 26A may be made of a magnetic material such as iron or stainless steel.

Thereby, when the pin 16A is locked by the hook 26A, the hook 26A can be attracted to the magnet 31, and the swinging of the hook 26A can be suppressed.

In FIG. 4(c), the hook 26A includes a weight 32. The weight 32 is arranged at a position that moves the center of gravity G of the hook 26A downward. Further, the weight 32 can be placed at a position where it does not interfere with the rotational movement of the hook 26A and the pressing movement of the inclined surface 30A with the pin 16A.

Thereby, when the pin 16A is locked by the hook 26A, the position of the hook 26A can be stabilized, and swinging of the hook 26A can be suppressed.

In FIG. 4(d), a leaf spring 33 is provided on the wall surface of the horizontal frame member 21A in FIG. 1(a). The leaf spring 33 is arranged at a position where it is biased by the hook 26A, for example, when the pin 16A is in a locked state in which it is locked by the locking surface 27A. Furthermore, the leaf spring 33 can be placed at a position where it does not interfere with the rotational movement of the hook 26A and the pressing movement of the inclined surface 30A with the pin 16A.

Thereby, when the pin 16A is locked by the hook 26A, the movement of the hook 26A can be suppressed by the plate spring 33, and the swinging of the hook 26A can be suppressed.

FIG. 5 is a perspective view showing a state before assembly of the bed member according to the second embodiment.
In FIG. 5, the bed includes a headboard 51 and a head frame F3 as bed members. The head frame F3 can be attached to the front end of the center frame F2 in FIG. 1(a). The headboard 51 can be mounted perpendicularly to the tip of the head frame F3.

The head frame F3 includes horizontal frame members 41A and 41B. The horizontal frame members 41A and 41B are connected to each other via a connecting member 42. Board stays 43A, 43B are attached to the front end surfaces of each horizontal frame member 41A, 41B. The board stays 43A, 43B can support the headboard 51 on the head frame F3 by being inserted into the board brackets 53A, 53B.

Moreover, insertion holes 46A and 46B into which hooks 56A and 56B can be respectively hooked are provided on the wall surface of each of the horizontal frame members 41A and 41B. Each insertion hole 46A, 46B can be arranged adjacent to a board stay 43A, 43B.

The headboard 51 includes board brackets 53A and 53B. The board brackets 53A and 53B can be attached to the lower end of the inner wall surface of the headboard 51. Each board bracket 53A, 53B can be fixed to the inner wall surface of the headboard 51 with, for example, a screw. Each board bracket 53A, 53B can be configured in the shape of a pocket with an open bottom. Board stays 43A and 43B can be inserted into each of the board brackets 53A and 53B from below.

Hooks 56A, 56B are rotatably supported on the front surface of each board bracket 53A, 53B. The hooks 56A, 56B are arranged so that the insertion holes 46A, 46B are located below each hook 56A, 56B when the headboard 51 is mounted on the head frame F3. Here, each hook 56A, 56B is provided with a rotation shaft 58A, 56B serving as a rotation center during rotation.

When attaching the headboard 51 to the head frame F3, the operator holds the headboard 51 on the head frame F3 so that the insertion holes 46A and 46B are located below the hooks 56A and 56B.

Then, the operator lowers the headboard 51, inserts the board stays 43A and 43B into the board brackets 53A and 53B, and rotates the hooks 56A and 56B based on the pressure from the horizontal frame members 41A and 41B. . When each hook 56A, 56B is rotated until it can be hooked into each insertion hole 46A, 46B, each hook 56A, 56B rotates to its original position due to its own weight, and is inserted into each insertion hole 46A, 46B. Each hook 56A, 56B is caught.

At this time, movement of the headboard 51 in the width direction with respect to the head frame F3 is restrained by board stays 43A and 43B inserted into board brackets 53A and 53B. Moreover, each hook 56A, 56B can be pulled out from each insertion hole 46A, 46B based on the same rotational movement as in FIGS. 3(a) to 3(e), and the locked state of each hook 56A, 56B can be canceled.

FIG. 6(a) is a perspective view showing the positional relationship between the insertion hole and the hook before assembly of the bed member according to the second embodiment, and FIG. 6(b) is a perspective view of the bed member according to the second embodiment. FIG. 3 is a perspective view showing the positional relationship between the insertion hole and the hook after assembly. In the following description, the hook 56A in FIG. 5 will be taken as an example, but the same applies to the hook 56B.

In FIG. 6(a), the hook 56A includes a locking surface 57A that locks the insertion hole 46A, and an inclined surface 60A on which the horizontal frame member 41A can slide. The inclined surface 60A forms an acute angle with the locking surface 57A through the tip of the locking surface 57A. The inclined surface 60A extends to the lower end of the hook 56A.

Then, the headboard 51 is lowered, and the horizontal frame member 41A is brought into contact with the inclined surface 60A with the board stay 43A inserted into the board bracket 53A. When the headboard 51 is further lowered, the inclined surface 60A is pressed by the horizontal frame member 41A, and the hook 56A rotates, so that the insertion hole 46A can be received in the locking surface 57A.

When the hook 56A is further lowered, the hook 56A rotates in a direction returning to its original position due to its own weight, and as shown in FIG. to move to.

In the second embodiment described above, the method of attaching the headboard 51 to the head frame F3 was taken as an example, but the method may be applied to a method of attaching a footboard to the foot frame.

FIG. 7(a) is a perspective view showing the state before assembly of the bed member according to the third embodiment, and FIG. 7(b) is a perspective view showing the state after assembly of the bed member according to the third embodiment. 7(c) is a side view showing an enlarged portion of region RB in FIG. 7(b).

In FIG. 7(a), the bed includes a waist bottom 61 and a center frame F2K as bed members. The center frame F2K can be configured similarly to the center frame F2 in FIG. 1(a). However, in the center frame F2K, pins 24AK and 24BK are provided in place of the grooves 24A and 24B of the center frame F2. The pins 24AK and 24BK can be provided on the inner wall surfaces of the horizontal frame members 21A and 21B.

The waist bottom 61 can be mounted on the center frame F2K. The waist bottom 61 can form a floor surface that supports the waist of the human body. The waist bottom 61 includes a ventilation hole 65 and spacers 62A and 62B. Spacers 62A and 62B support waist bottom 61 on center frame F2K. The spacers 62A and 62B can be attached to both ends of the lower surface of the waist bottom 61.

Hooks 66A, 66B are rotatably supported on the inner wall surface of each spacer 62A, 62B. The hooks 66A, 66B are arranged so that the pins 24AK, 24BK are located below each hook 66A, 66B when the waist bottom 61 is attached to the center frame F2. At this time, a ventilation hole 65 is provided adjacent to the inner wall surface of each spacer 62A, 62B to ensure a rotation path for each hook 66A, 66B.

Furthermore, restraining members 63A and 63B are attached to the spacers 62A and 62B, respectively. Each deterrent member 63A, 63B can be positioned adjacent to a side surface of each hook 66A, 66B. The restraining members 63A and 63B can restrain the waist bottom 61 from moving in the longitudinal direction of the center frame F2K in a state where the waist bottom 61 is attached to the center frame F2K.

Each restraining member 63A, 63B is provided with a groove 64A, 64B into which each pin 24AK, 24BK can be inserted. The width of each groove 64A, 64B can be made to correspond to the diameter of each pin 24AK, 24BK.

When attaching the waist bottom 61 to the center frame F2K, the worker holds the waist bottom 61 on the center frame F2K so that the pins 24AK and 24BK are located below the hooks 66A and 66B.

Then, with the pins 24AK and 24BK inserted into the grooves 64A and 64B, the operator rotates the hooks 66A and 66B based on the pressure exerted by the pins 24AK and 24BK. When each hook 66A, 66B is rotated until it can lock each pin 24AK, 24BK, it returns to its original position due to its own weight, as shown in FIG. 7(b). The pins 24AK and 24BK are respectively locked by the hooks 66A and 66B.

For example, as shown in FIG. 7(c), the hook 66B includes a locking surface 67A that locks the pin 24BK and an inclined surface 70A on which the pin 24BK can slide. The inclined surface 70A forms an acute angle with the locking surface 67A through the tip of the locking surface 67A. The inclined surface 70A extends to the lower end of the hook 66B. Further, the hook 66B includes a rotation shaft 68B that serves as a rotation center during rotation. A shaft support portion 65B that supports a rotating shaft 68B is fixed to the spacer 62B.

Here, when the inclined surface 70A is pressed by the pin 24BK, the hook 66B rotates, and the pin 24BK can be moved to a state where it can be received by the locking surface 67A. Furthermore, by rotating the hook 66B under its own weight, the pin 24BK can be brought into a state of being locked by the locking surface 67A. At this time, each pin 24AK, 24BK is locked by hook 66A, 66B while being inserted into groove 64A, 64B. Therefore, when the pins 24AK and 24BK are respectively locked by the hooks 66A and 66B, each hook 66A and 66B can be prevented from swinging, and the waist bottom 61 can be prevented from wobbling in the length direction. It can be prevented.

8(a) to 8(c) are enlarged perspective views showing the relationship between the position of the pin and the rotational position of the hook from the locked state to the released state of the hook shown in FIG. 7(b).
In FIG. 8A, it is assumed that the hook 66B is in a locked state in which the pin 24BK is locked. Then, the locked state in which the pin 24BK is locked is released. In this case, as shown in FIGS. 8(b) and 8(c), the hook 66B is rotated to bring the back surface of the hook 66B into contact with the pin 24BK.

Here, when rotating the hook 66B, the hook 66B can be passed through the ventilation hole 65. Therefore, when rotating the hook 66B, it is possible to prevent the waist bottom 61 from interfering with the rotation of the hook 66B.

In addition, in the above-mentioned embodiment, a hook was taken as an example of an engaging part that can be engaged with a receiving part, but the engaging part is not necessarily limited to a hook, and may have other configurations as well. good. For example, the engaging portion may be a hook-shaped member such as a yak or claw hacker, or may be a hanging tool such as an S ring.

Furthermore, the present invention is not limited to the embodiments described above, and includes various modifications. For example, the embodiments described above have been described in detail to explain the present invention in an easy-to-understand manner, and the present invention is not necessarily limited to having all the configurations described. Furthermore, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Furthermore, it is possible to add, delete, or replace some of the configurations of each embodiment with other configurations.

F1 Base frame, F2 Center frame, 11A, 11B, 21A, 21B Horizontal frame member, 12A, 12B, 22A, 22B Connection member, 13A, 13B, 23A, 23B Bracket, 14A, 14B Link member, 15A Slide arm, 15B, 15C Lifting arm, 16A, 16B Pin, 24A, 24B Groove, 25A, 25B Shaft support part, 26A, 26B Hook, 27A Locking surface, 28A Rotating shaft, 29A Lower end, G Center of gravity

Claims (7)

A bed comprising a first member and a second member attached to the first member,
a receiving portion fixed to the first member;
an engaging portion rotatably supported by the second member and capable of engaging with the receiving portion based on rotational movement due to its own weight;,Equipped with
The center of gravity of the engaging part is set at a position where the engaging part is stable in a locked state in which the engaging part locks the receiving part,
The engaging portion has an inclined surface on an outer surface on which the receiving portion can slide,
From a state in which the first member and the second member are separated, the operator brings the engaging portion close to the receiving portion to bring the receiving portion into contact with the inclined surface of the engaging portion. When you press the inclined surface with
After the engaging part transitions to a state in which it can lock the receiving part based on the rotational movement based on the pressing,
The engaging portion shifts to a locked state in which the receiving portion is locked based on a rotational movement in a direction returning to the original position based on its own weight.death,
The engaging portion is a hook that engages with the receiving portion, has the inclined surface on the outer surface, has a locking surface on the inner surface that locks the receiving portion, and has the inclined surface and the engaging surface. a stop surface is continuous through the tip of the stop surface,
From a state in which the first member and the second member are separated, the operator brings the hook close to the receiving portion, thereby bringing the receiving portion into contact with the sloped surface of the hook, and causing the hook to contact the sloped surface. When you press
After the hook is rotated by the pressing force and the receiving portion is positioned at the tip of the locking surface, the receiving portion is transitioned to a lockable state;
The bed in which the hook rotates in a direction returning to the original position due to its own weight, receives the receiving part on the locking surface, and then shifts to the locked state in which the receiving part is locked.. The bed according to claim 1 , wherein the engaging portion is capable of releasing the locked state based on a rotational movement from the locked state in which the receiving portion is locked. The engaging part is rotatable 360 degrees,
When the operator rotates the engaging part in a direction away from the receiving part from a locked state in which the engaging part has locked the receiving part, the back surface of the engaging part comes into contact with the receiving part. 3. The bed according to claim 2, wherein the locked state can be released. The bed according to any one of claims 1 to 3 , further comprising a restraining part that restrains displacement of the first member and the second member in a locked state in which the receiving part is locked. 5. The bed according to claim 4 , wherein the restraining portion restrains horizontal displacement of the first member and the second member by fitting the first member and the second member into each other. A bed comprising a first member and a second member attached to the first member,
a receiving portion fixed to the first member;
an engaging part rotatably supported by the second member and capable of engaging with the receiving part based on rotational movement due to its own weight,
The center of gravity of the engaging part is set at a position where the engaging part is stable in a locked state in which the engaging part locks the receiving part,
The engaging portion has an inclined surface on an outer surface on which the receiving portion can slide,
From a state in which the first member and the second member are separated, the operator brings the engaging portion close to the receiving portion to bring the receiving portion into contact with the inclined surface of the engaging portion. When you press the inclined surface with
After the engaging part transitions to a state in which it can lock the receiving part based on the rotational movement based on the pressing,
The engaging portion transitions to a locked state in which the receiving portion is locked based on a rotational movement in a direction returning to the original position based on its own weight,
The engaging part is rotatable 360 degrees,
When the operator rotates the engaging part in a direction away from the receiving part from a locked state in which the engaging part has locked the receiving part, the back surface of the engaging part comes into contact with the receiving part. , a bed that can release the locked state;. The first member and the second member include a combination of a first frame that supports the bed and a second frame that is movable up and down on the first frame, a third frame that supports a bottom that forms a floor surface, and the Claims 1 to 6, wherein the combination is selected from at least one of a combination with a boat that can be vertically attached to an end of the third frame, and a combination of the bottom and a fourth frame that supports a bottom forming a floor surface. The bed according to any one of the above.

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