JP2898630B1 - Bed with movable rest member - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To easily switch between any operation states at any time. SOLUTION: A first member in which a rest member 2 can be used as a pillow.
The bed body is rotatable so that it can reciprocate from a position P1 to a second position P2 that can be used as a waist or back stretch through a third position P3 that can be used as a pillow and a backrest and a fourth position P4 that can be used as a backrest. 1, a rest member support arm 3 connected to the arm 1, a stopper device 4 for stopping the arm 3 at each position, a plurality of caster devices each provided on the bed body 1, and a caster device for rotating the arm 3. An interlocking device for interlocking is provided, and can be switched between an interlocking setting state and an interlocking disconnection state. In the interlocking setting state, the wheel operation of the caster device can be linked with the turning operation of the arm 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed, and more particularly to a bed provided with a rest member that can be used as a pillow or the like.

[0002]

2. Description of the Related Art Generally, a bed for a human body used as furniture or the like is made of a material such as wood or metal, a bed base made of a combination of these materials, and a cushion material such as a mattress provided thereon. Consists of When using such a bed as bedding, a pillow is separately used. Such pillows are also used for watching TV, reading on the bed, eating and drinking, etc. by using the pillow for the backrest on the bed. In addition, such pillows, when performing waist stretching and back stretching exercises on the bed,
It may be used as a rest member to be applied to the waist or its vicinity.

[0003] In addition, the bed may be configured to be easily movable by attaching a caster to the bed in advance. Further, at that time, when the bed is not moved, a mechanism for raising the caster relatively to the bed may be adopted.

[0004]

However, so far, the bed has been placed in at least two of the following states: bedding, furniture for watching TV, health equipment for stretching the waist, and stretching the back. There are no beds that can be used at any time. As for the bed movement, the movable bed as described above is found in a bed for a sick person or the like, but the operation of putting in and out the casters is troublesome.

Accordingly, the present invention provides a movable rest member which can be used at any time between two or more of bedding, furniture for watching TV, reading, etc., health equipment for stretching the waist, stretching the back, and the like. It is an object to provide a bed with a bed. It is another object of the present invention to provide a bed which can easily and easily switch between a movable state and a fixed position installation state.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a bed body, a rest member, and a first member which supports the rest member and which can be used as a pillow.
And a rest member support arm rotatably connected to the bed body so as to be able to reciprocate up to a predetermined second position on the upper side of the bed body, and the rest member support arm. The first and second
A stopper means for stopping at each position of the bed body, each of which is provided on the bed body and includes wheels, and the wheels protrude below the bed body and allow the bed body to move or the bed A plurality of caster devices that can reciprocate between a retracted position that retreats to the main body side and inhibits movement of the bed main body, and the plurality of caster devices that are interlocked with the rotation of the rest member support arm. The interlocking device can switch between an interlocking setting state and an interlocking disconnection state, and in the interlocking setting state, interlock the turning operation of the rest member support arm with the wheel moving operation of each of the caster devices. A bed with a movable rest member is provided.

The stopper may stop the rest member at at least one predetermined intermediate position between the first and second positions. In this case, the intermediate position of the rest member may be, for example, a position where the rest member at the position can be used as a pillow and / or a backrest of the human body on the bed body. The second position of the rest member is, but not limited to, a representative example, a waist stretcher that allows the waist of a human body lying on the bed main body or a portion in the vicinity thereof to abut against the rest member at the position from above. The location can be mentioned.

In any case, the bed with a movable rest member according to the present invention can be used as bedding by arranging the rest member in the first position (the position used as a pillow) and rotating the rest member supporting arm. By moving it and disposing it at the second position, it is possible to switch to furniture for another use.
When the second position of the rest member is set to the waist stretching position, a person who is lying on the bed body or the like applies his or her waist or a part in the vicinity thereof to the rest member at the second position to stretch the waist or stretch the back. Exercise can be performed, and the bed can be used as a health appliance.

The movement of the rest member from the first position to the second position or from the second position to the first position can be easily performed by turning the rest member support arm. Can be stopped by the stopper means. When the stopper means can also stop the rest member at at least one predetermined intermediate position between the first and second positions, the rest member supporting arm is rotated to move the rest member to such a position. By moving the bed to the intermediate position and stopping there by the stopper means, the bed can be given another use or function.

The intermediate position of the rest member is, for example,
When the rest member at this position is a position where the rest member can be used as a pillow and / or a backrest on the bed body, the rest member can be used as a pillow at a position different from the first position, or the rest member can be used as a pillow. With the backrest, one or more of television viewing, reading, eating and drinking, etc. on the bed body can be performed.

The stopper means can stop the rest member at a selected first or second position or at any one of intermediate positions so as not to obstruct the human body on the bed. Anything should do. When the second position is a position at which the rest member abuts on the bed body, a part of the stopper means may also serve as the rest member abutting portion of the bed body.

In any case, the stopper means is, for example, a polygonal member rotatably attached to the bed body, and the rest member support arm in a direction for moving the rest member from the second position to the first position. May include a polygonal member having a plurality of sides that can be selectively brought into contact with the arm so that the distance between each side and the member rotation center is different. .

The bed according to the present invention is provided with the interlocking device for interlocking the rest member support arm and each caster device as described above. Put this interlocking device in the interlocking setting state,
When the rest member support arm is rotated to a predetermined position, for example, to the second position or to a position near the second position, the wheels of the respective caster devices protrude downward relative to the bed body and the bed is installed. Contact the floor. In this state, the bed can be easily moved. The pivoting operation of the rest member supporting arm for projecting the wheel can be easily and easily performed by leveraging the longer rest member supporting arm like a lever, as compared with the caster projecting operation using a small handle in the conventional movable bed. Further, when the rest member supporting arm is returned to another predetermined position, for example, the first position or a position close to the first position, from the state where the wheels are protruded, the wheels retreat to the bed body side. Therefore, the bed itself comes into contact with the floor surface, and movement of the bed is prohibited.

This interlocking device may be such that when the wheels of each caster device retreat by rotating the rest member support arm, the retraction is forcibly linked with the rotation of the arm. Instead of forcibly transmitting the rotating power of the arm to the wheels of the caster device, the wheels may be raised and retreated relative to the bed body by the weight of the bed, while the bed body may be lowered to contact the floor surface.

When the interlocking device is set to the interlocking and disconnected state, only the rest member support arm is rotated in a state where the bed body is set in a fixed position on the floor in a movement prohibited state, and the rest member is arranged at a desired position. Can be. Switching between the interlocking setting state and the interlocking disconnection state in the interlocking device can be performed by various mechanisms. For example, a member on the rest member supporting arm side and a member on the wheel side in the interlocking device are connected with a connecting pin or a connecting bolt. Can be exemplified.

Various types of known caster devices can be used.
The supporting device for moving heavy objects disclosed in Japanese Patent Application Publication No. 840 can be used, and as an interlocking device between the rest member supporting arm and the caster device in the case of using the supporting device, it is possible to use When a plurality of devices are provided in furniture, an interlocking mechanism of those devices can be used.

The caster device using the supporting device for moving heavy objects disclosed in Japanese Patent Application Laid-Open No. 10-35840 is as follows. A mounting base fixed to the bed base, a lateral drive shaft rotatably supported by the mounting base, and fixed to the drive shaft, and swung downward by a rotation operation of the drive shaft in a predetermined direction. A cam that swings upward by a rotation operation of the drive shaft in the opposite direction; a movable part that is supported by the mounting base so as to swing vertically and extends below the cam; and a movable part that is supported by the movable part. Provided, a resilient member that applies a force to the movable portion to swing the movable portion toward the cam, and a stop mechanism for stopping the movable portion, the stop mechanism being interlocked with the drive shaft. The movable portion is pushed down by the cam against the elastic body by the downward swing of the cam due to the rotation operation of the drive shaft in a predetermined direction, whereby the wheel protrudes downward, and the driving The cam by a rotation operation in the opposite direction of the shaft The upward swing causes the elastic body to swing upward in a direction following the cam, whereby the wheel retreats upward, and the stop mechanism operates the drive shaft to rotate in the predetermined direction. When the wheel assumes a downwardly protruding state, the movable portion supporting the protruding wheel is stopped at that position so as to maintain the protruding state, and the drive shaft rotates in the opposite direction from that state. A caster device that is a mechanism that releases the movable portion stop when operated.

The following can be exemplified as the number and arrangement of the caster devices and the interlocking devices when such caster devices are employed. That is, the caster device,
For example, four pieces can be attached to the bed base of the bed body so as to be located at each corner of the square. In this case, the centers of the drive shafts are aligned for every two adjacent shafts, and the drive shafts are constituted by a common single shaft or connected by a suitable connecting rod.

The common drive shaft or drive shaft connecting rod is arranged in parallel, and one intermediate shaft is arranged between them in parallel with each other, and is rotatably supported by the bed base. The crank arm is fixed to each common drive shaft or connecting rod, and the crank arm is also fixed to the intermediate shaft. The crank arm on one common drive shaft or connecting rod and one end of the crank arm on the intermediate rod are connected by a connecting rod, and the crank arm on the other common drive shaft or connecting rod and the crank arm on the intermediate rod Is connected to the other end by a connecting rod. At the end of the intermediate shaft,
The center axis of rotation of the rest member support arm is connected via a separation mechanism.

In any case, the bed according to the present invention is
It can be used at any time by switching between any two or more of bedding, furniture for watching TV, reading, etc., health equipment for stretching the waist, stretching the back, and the like. Further, switching between the movable state and the fixed position installation state can be easily and easily performed.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of the entire bed according to the present invention, and FIG. 2 is a plan view of the entire bed. FIG. 3 is a side view of a part of the bed in a state where the rest member is arranged at a first intermediate position, and FIG. 4 is a side view of a part of the bed in a state where the rest member is arranged at a second intermediate position. FIG.
5A is a plan view of an interlocking device between the rest member support arm and a plurality of caster devices, and FIG. 5B is a side view of a part of the interlocking device. 6 and 7 show the caster device. FIG. 6 is a side view in a state where the wheels are raised and retracted, and FIG. 7 is a side view in a state where the wheels are lowered and protruded. 8 is a plan view of an interlocking setting / separation mechanism in the interlocking device shown in FIG. 5, and FIG. 9 is a cross-sectional view of the interlocking device taken along line XX shown in FIG.

The illustrated bed A with movable rest member is:
As shown in FIG. 1 and FIG. 2 and the like, a bed body 1, a rest member 2, a rest member supporting arm 3 for supporting the rest member 2, and a stopper device 4 for the arm 3 are included. Further, as shown in FIG. 5 and the like, the four caster devices 5, the rest member support arm 3 and the caster device 5
The interlocking device 6 is provided.

The bed body 1 comprises a bed base 11 and a cushion member 12 placed thereon. The rest member 2 is obtained by encapsulating a core material made of a cushion material with an exterior sheet, and the rest member supporting arm 3 penetrates the rest member 2. The rest member support arm 3 has a U-shape or a gate shape as shown in FIG. 2 when viewed from a plane, and a portion 31 penetrating the rest member 2 and both ends thereof are integrally formed on the side surface of the bed body 2. Bed 1 along
And a portion 32 extending to the outside. At the end 321 of the portion 32 extending along the side surface of the bed body 1, a rotation center shaft 670 (see FIGS. 8 and 9) is provided with the through portion 3.
It is provided in parallel with 1. This rotation center shaft 670 is
It is connected to an interlocking setting / disconnecting mechanism 67 (FIGS. 8 and 9) of the interlocking device 6 described later with reference to FIG. 5 and the like, and also serves as a part of the mechanism. Thus, the rest member support arm 3 can rotate above the bed body 1 about the rotation center axis 670, and by this arm rotation, the rest member 2 moves to the first position P1 (FIG. 1,
2) to the first intermediate position P3 (see FIGS. 1 and 3),
It is possible to reciprocate to a second position P2 (see FIG. 1) via a second intermediate position (see FIGS. 1 and 4) P4.

The first intermediate position P3 is a position where the rest member 2 is used as a pillow and / or a backrest, and the second intermediate position P4 is a position where the rest member 2 is used as a backrest. The second position P2 is a position where the waist of a human body lying on the bed main body 1 or a part in the vicinity thereof is a rest member 2 at that position.
It is a waist extension position that can be contacted from above,
This is a position where the rest member 2 is used for stretching the waist and stretching the back muscles.

The stopper device 4 of the arm 3 includes a pair of triangular members 41. The triangular members 41 are rotatably attached to both side surfaces of the bed base 11 of the bed body 1. This member 41 is used for the rest member 2
Of the rest member support arm 3 in a direction to move the rest member from the second position P2 toward the first position P1.

One side a1 of each triangular member 41 is separated from the member rotation center Co by a distance a, and the other side b1
Is separated by a distance b from the rotation center Co, and the other side c1 is separated by a distance c from the rotation center Co. The magnitude relation is a <b <c. Each of the triangular members 41 can lift the rest member support arm 3 slightly and can be manually rotated. As shown in FIG. 1, when the arm 3 is supported by the side a1 at a distance a from the center, the rest member 2
(Pillow position) P1. As shown in FIGS. 1 and 3, when the arm 3 is supported on the side b1 at a distance b from the center,
The rest member 2 is set at the first intermediate position (pillow and / or backrest position) P3. When the arm 3 is supported on the side c1 at a distance c from the center as shown in FIGS. 1 and 4, the rest member 2 is set at the second intermediate position (backrest position) P4.

When the rest member 2 assumes the second position P2, the rest member 2 comes into contact with the upper surface of the cushion member 12 of the bed body 1, where it is stopped and supported. Therefore, the portion of the cushion member 12 where the rest member 2 comes into contact also constitutes the stopper device 4. The second position may be a position where the rest member 2 does not contact the bed body 1, and in this case, means for stopping and supporting the rest member 2 at that position may be added to the stopper device.

The above-mentioned four caster devices 5 are shown in FIG.
As shown in FIG. 2A, it is mounted inside the bed base 11 so as to be located at each corner of the square. Each caster device 5 has a bed base 11 as shown in FIGS.
And a mounting base 51 fixed to the base. The mounting base 51 includes a pair of brackets 511,
A lateral drive shaft (here, a horizontal drive shaft) 52 is fitted to the pair of brackets 511. Further, the shaft 5
The movable portion 54 is attached at a position below the position 2. A pair of cams 53 are fixed to the shaft 52.

The lateral drive shaft 52 is formed of a metal square pipe, and a pair of rings 521 made of synthetic resin and having a circular outer contour is fitted on a part thereof. Is rotatably supported by a bearing 512. The bracket 511 and the ring 52
1. Only the bearing 512 that supports this is shown in the drawing. Thus, the drive shaft 52 can be rotated.

The cam 53 includes a pair of arms 531 supported on the drive shaft 52 between the pair of base brackets 511 and a shaft 5 provided at the tip of each arm.
32 and an idler roller 533 provided on the shaft bar 532. Only the arm 531 and the roller 533 are shown on the near side. The cam 53 swings downward by rotating the drive shaft 52 in a predetermined direction, and swings upward by rotating the drive shaft 52 in the opposite direction.

The movable portion 54 is plate-shaped here, is connected to the mounting base 51 at the rear end 541, and is mounted in a cantilevered manner so as to swing vertically.
3 extends below. A wheel 55 is attached to and supported by the movable portion 54 so as to be able to change its direction. A coil spring 56 is connected between the movable portion 54 and the mounting base 51, and the spring 56 constantly applies a force to the movable portion 54 to swing upward the movable portion 54 toward the cam 53.

The caster device 5 has a stopping mechanism 57 for the movable part 54. The stop mechanism 57 is provided with the cam 5.
3 and a pair of arms 531 and engagement pins 571 protruding from both side surfaces of the movable portion 54. Each arm 531 has an engagement recess 572 at the distal end to form a part of the stop mechanism. According to the caster device 5, as shown in FIG. 6, the wheels 55 are lifted from the bed installation floor F, and the drive shaft 52 is moved in a predetermined direction (clockwise WC in the figure) from the state where the bed A is installed at a fixed position. In response to this, the cam 53 swings downward in conjunction therewith, and the idler roller 533 of the cam comes into contact with the upper surface of the movable portion 54 and pushes it down against the spring 56. As a result, as shown in FIG. 7, the wheels 55 project downward relative to the bed body 1 and come into contact with the bed installation floor surface F. The bed body 1 rises relatively and rises. Bed A can be moved in this state.

When the drive shaft 52 is turned in the opposite direction (counterclockwise in the illustrated example) from the state shown in FIG. 7, the cam 53 swings upward in conjunction with this operation, and the spring 56 Makes the movable body 54 follow the cam 53 and swing upward. As a result, the wheel 55 retreats upward and rises from the floor F. On the other hand, the bed body 1 is placed on the floor F, and the movement is prohibited.

As shown in FIG. 7, when the wheels 55 are projected downward to come into contact with the floor surface F to make the bed A movable, the idle rollers 533 of the cam 53 are in contact with the movable portion 54. When swinging down and exceeding the conceivable point, the engaging recess 572 of the arm 531 in the stopping mechanism 57 engages with the engaging pin 571 on the side surface of the movable portion, thereby stopping the movable portion 54 and securing the movable portion 54 at the wheel projecting position. To hold. In this state, the drive shaft 52 can be turned in the opposite direction to move the wheels 55 up and down.

As described above, as shown in FIG. 5, four caster devices 5 are attached to the bed base 11 of the bed body 1 so as to be positioned at each corner of the square. To the rest member support arm 3. In the four caster devices 5, the center of the drive shaft 52 is made coincident with each of the two on the head side and the two on the foot side of the bed A, and the drive shafts are commonly unified. .

The interlocking device 6 is thus shared and arranged in parallel with the two drive shafts 52, and is disposed between them in parallel with each other and rotatably supported by the bed base 11. One intermediate shaft 61, a crank arm 62 fixed to one common drive shaft 52, and another common drive shaft 52
Connecting rod connecting the crank arm 63 fixed to the intermediate shaft 61, the crank arm 64 fixed to the intermediate shaft 61, and one end of the crank arm 62 on one common drive shaft 52 and one end of the crank arm 64 on the intermediate shaft 61 65
A connecting rod 66 connecting the crank arm 63 on the other common drive shaft 52 to the other end of the crank arm 64 on the intermediate shaft 61; and both ends 611 of the intermediate shaft 61 protruding outside the bed base 11. And an interlocking setting / separation mechanism 67 provided in the system.

The intermediate shaft 61 is made of a square pipe made of metal. As shown in FIGS. 8 and 9, a ring 611a having a circular outer contour made of synthetic resin is fitted to each end 611. The ring 611a is rotatably supported by the bed base 11 by being rotatably fitted to the bearing 11a of the bed base 11 side plate. Link setting / separation mechanism 67
As shown in FIGS. 8 and 9, as a component, a rotation center shaft 670 protruding from an end 321 of a portion 32 of the rest member supporting arm 3 extending along the side surface of the bed body 1 is included. . The rotation center shaft 670 is a member having a circular cross section.
It is rotatably inserted into the end 611 of the intermediate shaft 61 that protrudes to the outside of the bed base 11. The intermediate shaft 61
May be a circular pipe or the like, in short, the crank arm can be fixed, and can be rotatably supported on the bed base 11,
What is necessary is just to be able to fit the rotation center shaft 670 so that rotation is possible. A bolt through hole 671 is provided in the intermediate shaft end portion 611, and a female screw member 672 is fixed to an outer surface corresponding to the bolt hole, and a bolt 673 is attached to the female screw member 672.
Is screwed. Bolt 673 is bolt handle 673
It can be manually rotated at a. Further, a bolt insertion hole 674 corresponding to the bolt through hole 671 of the intermediate shaft is provided in the rotation center shaft 670.

When the rest member 2 is located at the first position P1 and the wheels 55 of each caster device 5 are at the raised and retracted position shown in FIG. 6, the bolt through holes 671 of the intermediate shaft end 611 are closed. The bolt 6 is aligned with the bolt insertion hole 674 of the rotation center shaft 670 at the end of the rest member support arm.
The interlocking setting state can be obtained by inserting 73 into holes 671 and 674. Insert bolt 673 into bolt insertion hole 6
If it comes out from 74, it will be in an interlocking disconnection state.

Therefore, in this mechanism 67, the rest member 2 can be set to any desired position among the positions P1, P2, P3, and P4 by turning only the rest member support arm 3 in an interlocking and disconnected state. At this time, in each caster device 5, the wheels 55 are pulled up by the springs 56 and are in the raised and retracted position shown in FIG. 6, so that the bed body 1 is in contact with the floor surface F and does not move.

When the rest member 2 is arranged at the first position P1 and the bolt 673 is inserted from the bolt insertion hole 671 of the intermediate shaft into the bolt insertion hole 674 of the rotation center shaft 670 of the arm 3 in the mechanism 67, the interlocking setting is performed. In this state, when the arm 3 is rotated until the rest member 2 comes to the second position P2, the intermediate shaft 61 is rotated in the interlocking device 6 shown in FIG. Both connecting rods 65 and 66, crank arm 62,
63 and transmitted to both drive shafts 52,
As shown in FIG. 7, the wheel 55 projects downward relative to the bed body 1 and comes into contact with the floor surface F to lift the bed body 1. The bed can be moved in this state. From this bed movable state, the rest member supporting arm 3 is moved to the first position.
When the wheel 55 returns to the position P1 and turns, the wheels 55 move up and down again, and the bed body 1 comes into contact with the floor surface F.

In this embodiment, when the rest member 2 is set at the position P1 so that the mechanism 67 can be interlocked, and when the rest member 2 is placed at the position P2 that comes into contact with the bed body 1, a predetermined wheel 55 is set.
However, the position of the rest member for bringing the mechanism 67 into the interlocking setting state is not limited to the position P1, and may be a position closer to the position P1 between the positions P1 and P2. The position of the rest member 2 for obtaining the desired wheel projecting state is not limited to the position P2,
A position near the position P2 between the positions P1 and P2 may be used.

In the bed A with the movable rest member described above, the interlocking / separating state is set by the interlocking setting / separating mechanism 67 of the interlocking device 6, and the rest member supporting arm 3 is rotated to operate the rest member 2. By arranging it at the first position (position used as a pillow) P1 and using it as bedding, and by arranging it at the second position P2, a person who is lying on the bed body 1 can rest its waist and its vicinity on the rest member 2. It is possible to stretch the waist, stretch the back, etc. by touching the bed, and use the bed as a health appliance.

In addition, the rest member 2 can be used as a pillow and / or a backrest at another position when the rest member 2 is in the third position P3. In the fourth position P4, the user can watch the television on the bed body 1 with the backrest. One of reading, eating and drinking
Or two or more. In this way, the bed can be used for various purposes,
The function can be switched at any time, and the switching can be easily and easily performed by rotating the rest member support arm 3.

Further, the interlocking setting / separation mechanism 67 of the interlocking device 6 sets the interlocking state and rotates the rest member support arm 3 to the position P2 so that the bed A can be easily and easily moved. By rotating the rest member support arm 3 in the opposite direction toward the position P1 from this state, a state in which bed movement is prohibited easily and easily can be obtained.

[0045]

As described above, according to the present invention, bedding, furniture for watching TV and reading, health equipment for stretching the waist, stretching the back, etc. can be used at any time between any two or more states. A bed with a movable rest member that can be used by switching can be provided.

Further, according to the present invention, it is possible to provide such a bed which can easily and easily switch between a movable state and a fixed position installation state.

[Brief description of the drawings]

FIG. 1 is a side view of an entire bed according to the present invention.

FIG. 2 is a plan view of the entire bed shown in FIG.

FIG. 3 is a side view of a part of the bed in a state where a rest member is arranged at a first intermediate position.

FIG. 4 is a side view of a part of the bed in a state where a rest member is arranged at a second intermediate position.

5A and 5B show an interlocking device between a rest member support arm and a plurality of caster devices, wherein FIG. 5A is a plan view and FIG. 5B is a side view of a part thereof.

FIG. 6 is a side view of the caster device in a state where wheels are raised and retracted.

FIG. 7 is a side view of the caster device in a state in which the wheels descend and protrude.

8 is a plan view of a linkage setting / separation mechanism in the linkage device shown in FIG. 5;

FIG. 9 is a sectional view taken along line XX shown in FIG.

[Explanation of symbols]

 A Bed with movable rest member 1 Bed body 11 Bed base 11a Bearing 12 Cushion member 2 Rest member P1, P2, P3, P4 Rest member position 3 Rest member support arm 31 Rest member penetrating portion of arm 3 32 Bed body of arm 3 Part along side 321 End part of part 32 670 Center axis of rotation of arm 3 4 Stopper device 41 Triangular member Co Center of rotation of member 41 a1, b1, c1 Each side of member 41 a, b, c From center Co Distance to each side 5 Caster device 51 Mounting base 511 Bracket 512 Bearing 52 Lateral drive shaft 521 Ring 53 Cam 531 Arm 532 Shaft 533 Idling roller 54 Movable portion 541 Movable portion rear end portion 55 Wheel 56 Coil spring 57 Stop mechanism 571 Engaging pin 572 engaging recess 6 interlocking device 6 DESCRIPTION OF SYMBOLS 1 Intermediate shaft 611 End part of shaft 61 611a Ring 62, 63, 64 Crank arm 65, 66 Connecting rod 67 Interlocking setting / separation mechanism 671 Bolt through hole 672 Female screw member 673 Bolt 673a Bolt handle 674 Rotation center shaft 670 Bolt insertion hole F Floor surface

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-56754 (JP, A) JP-A-4-31103 (JP, A) JP-A-4-3734 (JP, U) JP-A-56 94553 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A47C 19/02 A47C 20/04 A47C 27/00

Claims (4)

(57) [Claims] 1. A bed body, a rest member, and a predetermined second position above the bed body that supports the rest member and is further away from a first position where the rest member can be used as a pillow. A rest member support arm rotatably connected to the bed main body so as to be able to reciprocate up to and a stopper means for stopping the rest member support arm at each of the first and second positions; The bed is provided on the bed body and includes wheels, and the wheels protrude downward from the bed body and protrude to allow movement of the bed body or retreat to the bed body side to inhibit movement of the bed body. A plurality of caster devices capable of reciprocating between a retreat position and an interlocking device for interlocking the plurality of caster devices with a rotation operation of the rest member support arm. Te, can be switched to an interlocking disconnected state and the interlocking set state,
A bed provided with a movable rest member, comprising: an interlocking device that can interlock the wheel movement of each of the caster devices with the rotation of the rest member support arm in the interlocking setting state. 2. The bed with a movable rest member according to claim 1, wherein said stopper means can also stop said rest member at at least one predetermined intermediate position between said first and second positions. 3. The bed with a movable rest member according to claim 2, wherein the intermediate position of the rest member is a position where the rest member at the position can be used as a pillow and / or a backrest of the human body on the bed body. 4. The second position of the rest member is a waist extension position at which a waist of a human body lying on the bed main body or a part near the waist can be brought into contact with the rest member of the position from above. 4. The bed with a movable rest member according to 1, 2, or 3.