JP2891699B1 - bed - Google Patents

Abstract

An object of the present invention is to provide a bed whose width and length can be changed as needed. SOLUTION: This bed is capable of expanding its width, and comprises a box-shaped bed body 10 and a bed body 10
Rotating body 20 arranged on the side and outside of
0, and a movable body 40 disposed outside of the movable body. When the movable body 40 is moved outward with respect to the bed body 10 as shown by an arrow, the pushing force of the damper 30 causes
The rotating body 20 rotates upward. The rotation of the rotating body 20 stops when the rotating body 20 comes into contact with the contact portion 41. Here, when the movable body 40 is slightly moved in the direction opposite to the arrow, the rotating body 20 is supported by the movable body 40. It is supported by the part 42 and becomes horizontal. By using the upper surface of the rotating body 20, it can be used as a wide bed. The reverse operation to the above operation, that is, lowering the rotating body 20,
When the movable body 40 is moved inward, it can be used as a narrow bed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed as bedding.

[0002]

2. Description of the Related Art Conventionally, the width and length of a bed are usually fixed. In the case of beds with fixed width and length, purchasing large ones in advance will reduce the space utilization efficiency except when it is necessary, while purchasing small ones will require special needs. When the problem occurs, there is a problem that it is not possible to cope with the need.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a user-friendly bed whose width and length can be changed as required. .

[0004]

According to a first aspect of the present invention, there is provided a bed, comprising: a bed body;
The bed includes a rotating body disposed on the side and outside of the bed body, and a movable body disposed on the outside of the rotating body. The rotating body has a free end with respect to the bed body. The upper surface of the rotating body and the upper surface of the bed main body are substantially flush with each other when the free end of the rotating body is lifted. It is arranged to be located on the top,
The movable body is configured to be separated and approachable from the bed main body, and the movable body contacts the free end of the rotating body when the rotating body is at the ascending position. It is characterized by having a supporting portion for preventing the rotating body from descending.

In this head, first, the movable body is moved in a direction away from the bed body (that is, outside), and then the rotating body is rotated to raise its free end so that the upper surface of the rotating body and the bed can be moved. The upper surface of the main body is located on substantially the same plane. Thereby, the rotating bodies are arranged side by side in the bed body, and the total area thereof is increased. Next, the movable body is slightly moved to the bed body side, and the rotating body is held at the raised position by the support.

According to a second aspect of the present invention, a handle is provided near a free end of the rotating body. Thus, the rotating body can be easily rotated by holding the handle.

A bed according to a third aspect is provided with a moving mechanism for pushing up and rotating the rotating body. Thus, by moving the movable body to the outside, the rotating body is raised by the pushing force of the moving mechanism.

According to a fourth aspect of the present invention, in the bed, the movable body includes a contact portion for stopping the rising of the free end of the rotating body against a pushing force applied to the rotating body from the moving mechanism. It is a configuration that can be used. Thus, the raised rotating body can be easily stopped at the specified position.

According to a fifth aspect of the present invention, in the bed, the bed body includes a guide mechanism for guiding the movement of the movable body. Thereby, the movement of the movable body is performed smoothly.

In the bed according to a sixth aspect, the rotating body and the movable body are arranged on both sides of the bed. Thereby, the amount of expansion of the width or length of the bed can be increased.

The bed according to claim 7 is characterized in that the moving mechanism is a damper having a pushing force. Thereby, the rotating body can be raised smoothly with the movement of the movable body.

In the bed according to the present invention, one end of the damper having the pushing force is rotatably attached to the bed body, and the other end of the damper having the pushing force is turned around the rotating body. It is characterized by being movably mounted. Thus, the rotating body can be raised more smoothly.

The bed according to the ninth aspect is characterized in that the lower end of the movable body is extended to a position where it can contact the floor surface. Thus, the weight of the user can be supported by the movable body in addition to the bed body.

According to a tenth aspect of the present invention, in the bed, the support portion protrudes from the movable body toward the bed body or in the opposite direction. Thus, the movable body can be supported on the upper surface of the support.

The bed according to the eleventh aspect has a bed body provided with a top plate, and is mounted outside the upper end of the bed body so as to be rotatable in forward and reverse directions such that its free end moves up and down. And a top plate for expansion whose upper surface is located on substantially the same plane as the top surface of the top plate when in a horizontal state, and is provided movably in the width direction on the outside of the bed body, and An extension top plate support for supporting the extension top plate in a horizontal state when in an extension position between a closest position closest to the bed main body and a most distant position; An interlocking mechanism that interlocks with the movement of the top plate support from the closest position to the farthest position and turns the expansion top plate at the lowest position upward to make it almost horizontal. It is characterized by having.

In the eleventh aspect of the present invention, when the bed is expanded, first, the extension top plate support is moved away from the bed body to the farthest position, and the extension top plate is moved by the interlocking mechanism. The bed rotates upward and becomes substantially horizontal, and the upper surface thereof is substantially at the same level as the upper surface of the top plate of the bed body. Thereafter, the extension top support is slightly moved in the direction approaching the bed body to set the extension top position. Here, the free end of the top plate for expansion is supported on the upper end of the top plate support for expansion. As described above, the bed can be expanded by increasing the area of the entire top plate by the top plate of the bed body and the expansion top plate. In addition, by linking the movement of the expansion table support and the rotation of the expansion table, the above-described bed expansion operation and bed reduction operation are easier than in the case of moving these separately. Becomes Further, only when the top support for extension moves from the closest position to the farthest position, the top support for extension and the top for extension work together, and the top support for extension is moved from the most distant position. During the final process of moving to the extended position, the extension top support and the extension top are not linked, so that your hand may be accidentally pinched between the extension top support and the extension top. Not safe.

Here, the bed and the extension top plate which are linked to each other are provided on both sides in the width direction of the bed body, so that the bed can be moved in the width direction. Can be expanded symmetrically.

According to a thirteenth aspect of the present invention, a movable head board and a movable foot board which are movable in the width direction with respect to the bed main body are provided in front and rear of the expansion top support, respectively. An interlocking mechanism is provided at each of both ends in the length direction of the top plate for expansion, and a roller member held at one of a retracted position and a pulled-out position, and an inner surface of each of the movable headboard and the movable footboard. And an arc-shaped guide groove for guiding each roller member along with the movement of the expansion top support while the respective roller members at the respective withdrawal positions are fitted therein. When the roller member is located at the upper end of the arc-shaped guide groove, the expansion top plate is in a substantially horizontal state.

According to the thirteenth aspect of the present invention, when the expansion top support is moved away from the bed body to the farthest position when the bed is expanded, both ends of the expansion top are pulled out. Since each roller member is guided by the arc-shaped guide grooves formed on the movable head board and the movable foot board of the extension top plate support, the extension top plate turns upward and becomes substantially horizontal. , The upper surface of which is substantially at the same level as the upper surface of the top plate of the bed body.
Thereafter, the extension top support is slightly moved in the direction approaching the bed body to set the extension top position. Here, the free end of the top plate for expansion is supported on the upper end of the top plate support for expansion. As described above, the interlocking mechanism can have a simple and low-cost structure including the roller member and the guide groove. Further, for example, when disassembling the bed during moving or the like, after the respective roller members are retracted and the engagement with the guide grooves is cut off, the expansion top plate is removed from the bed body.

According to a fourteenth aspect of the present invention, the movable top board and the movable foot board each have an inner surface which communicates with an upper end of an arc-shaped guide groove and which has a top plate supporting member extending from the most distant position. A linear guide groove extending in the horizontal direction for guiding each roller member when moving to the extended position is formed. In the present invention, when the top support for extension is moved from the most distant position to the extension position, the roller members at both ends of the top for extension are guided by the horizontal linear guide grooves. At the time of the movement of the top support, it is not necessary to separately hold the extension top plate, and the extension top support can be easily moved.

According to a fifteenth aspect of the present invention, when the expansion top plate at the lowest position is interposed between the expansion top plate and the expansion top plate support and rotates by a small angle, The apparatus further includes an urging mechanism for urging the expansion top plate in a further rotating direction. In the present invention, when the extension top plate is moved away from the bed body to the farthest position, the extension top plate is turned upward by the interlocking mechanism as described above. From an initial stage, the expansion top plate is urged by an urging mechanism to rotate upward. Therefore, the manpower required to move the extension top support away from the bed body is greatly reduced, and the bed extension operation is reduced.

The invention according to claim 16 is such that when the top support for expansion is at the farthest position, the top for expansion is inclined slightly downward from a horizontal state. In the present invention, after moving the extension top support to the farthest position, the free end of the extension top is manually lifted to bring the extension top to a substantially horizontal state. The plate support is pushed into the bed body to set it in the extended position, and the hand is released from the top for expansion and placed on the top support for extension.

According to a seventeenth aspect, as the urging mechanism, an inexpensive mechanism having a simple structure can be cited as in the seventeenth aspect.

[0024]

Next, embodiments of the present invention will be described with reference to the drawings. First, a first embodiment of a bed according to the present invention will be described with reference to FIGS. FIG. 1 is a plan view of a first embodiment of a bed according to the present invention,
2 is a schematic cross-sectional view taken along the line AA of FIG. 1, FIG. 3 is a schematic enlarged cross-sectional view taken along the line BB of FIG. 1, and FIGS. FIG.

In each of the accompanying drawings, the thicknesses and intervals of members are schematically illustrated as appropriate for easy understanding. Further, since the bed according to the present embodiment is symmetrical in the width direction (horizontal direction in FIG. 1), only one side (mainly the right half) from the center will be described, and the opposite side will be described in the figure. The detailed description is omitted by attaching the reference numerals. Further, the bed according to the present embodiment is a bed whose width is changed into three types of single size, double size and queen size.

The bed according to the present embodiment has a bed body 1
0, the width direction of the bed body 10 (left-right direction in FIG. 2)
The main components are a rotating body 20 arranged on the side and outside, a moving mechanism 30 for moving the rotating body 20, and a movable body 40 arranged outside the rotating body 20.

A moving mechanism 30 is provided on the side of the bed body 10.
A notch 11 for passing through is formed (see FIG. 2). As shown in FIG. 3, guide mechanisms 12 for guiding the movement of the movable body 40 are provided on the outer side surfaces at both ends in the length direction of the bed body 10. Guide mechanism 1
Reference numeral 2 denotes a rail 12a extending in a substantially horizontal direction and a slider 12b held on the rail 12a. The rail 12a is attached to a side surface of the bed body 10, and the slider 12b is attached to an inner surface of the movable body 40.

The rotating body 20 is formed in a rectangular plate shape and has a width (length in the vertical direction in FIG. 2).
Is set to be slightly shorter than the height of the bed body 10. The end of the rotating body 20 is attached to the vicinity of the upper end of the bed body 10 by a hinge 21. Thus, the rotating body 20 is attached to the bed body 10 so as to be rotatable in forward and reverse directions such that its free end moves up and down. The rotating body 20 is arranged such that the upper surface of the rotating body 20 and the upper surface of the bed body 10 are located on substantially the same plane in a state where the free end thereof is raised (the state shown in FIGS. 5 and 6). I have.

As the moving mechanism 30, a damper having a pushing force is used. As this damper, specifically, a gas spring Y2166 (G
S068 3040A) is used. Moving mechanism 3
Numeral 0 includes a cylinder 31 and a rod 32 housed inside the cylinder 31 and extending and contracting with respect to the cylinder 31 as main components. The moving mechanism 30 includes the rotating body 2
0 so that the rotating body 20 can be pushed up. Both ends of the moving mechanism 30 are rotatably attached to the bottom surface of the bed body 10 and the inner surface of the rotating body 20, respectively.

As shown in FIG. 1, the movable body 40 is formed to have a substantially U-shape in plan view. The lower end of the movable body 40 is extended to a position where it can touch the floor (see FIG. 2). At the upper end of the movable body 40, a contact portion 41 for stopping the rising of the free end of the rotating body 20 is provided.
Is provided. The movable body 40 is provided with a support portion 42 that prevents the lowering of the rotating body 40 by contacting the lower surface of the rotating body 20 at the position where the rotating body 20 is raised. The support portion 42 is provided between the movable body 40 and the bed
Is formed by a projection protruding in the direction of. The movable body 40 is arranged at a position where the movable body 40 can stop the rotating body 20 against the pushing-up force applied to the rotating body 20 from the moving mechanism 30 by being brought into contact with the rotating body 20. The movable body 40 is attached to the bed body 10 via the guide mechanism 12. Movable body 4
Reference numeral 0 denotes a configuration that can be separated from and approached to the bed body 10.

Next, a method of using the bed according to the present embodiment configured as described above will be described.

First, when used as a single-size bed, as shown in FIG.
0 is in a contracted state. In this state, the cushion 1 having an appropriate size is placed above the movable body 4. This allows
It can be used as a single-size bed having a length (vertical dimension in FIG. 1) and a width (horizontal dimension in FIG. 1) of, for example, about 2 m and 1.2 m, respectively.

Next, when this bed is to be used as a queen size (each having a length and width of about 2 m, for example), the cushion body 1 is once removed, and then the left and right movable bodies 40 are pulled out outward. At this time, in the present embodiment, since the bed body 10 includes the guide mechanism 12, the movable body 40 can be smoothly moved.

When the movable body 40 is pulled out, as shown in FIG. 4, the pushing force of the moving mechanism 30 causes the rod 32 to extend along with the movement of the movable body 40, and
Rises. Then, further pull out the movable body 40,
As shown in FIG. 5, the rotating body 20 is
Rise beyond. The rotating body 20 that has risen is
The movement is stopped by abutting on. In the bed of the present embodiment, since the contact portion 41 is provided, the rotating body 20 can be stopped at a specified position. Further, in the present embodiment, since the damper having the pushing force is used as the moving mechanism 30, the rotating body 40 can be smoothly moved.

Here, in the bed of the present embodiment, since both ends of the moving mechanism 30 are rotatably mounted on the bottom surface of the bed body 10 and the inner surface of the rotating body 40, the moving mechanism 30 is extended. Accordingly, the force acting on the moving mechanism 30 itself can be absorbed by the swinging movement of the moving mechanism 30 itself. Therefore, the movement of the rotating body 40 can be performed more smoothly.

Next, the movable body 40 pulled out is moved to the distance L.
(See Fig. 5). As a result, as shown in FIG.
2 can be reliably supported by the upper surface. In this state, the rotating body 20 has substantially the same height as the upper surface of the bed body 10.

Next, the bed body 10 and the rotating body 20
A cushion body of an appropriate size is placed on the upper surface of the. Thereby, the bed of the present embodiment can be used as a queen size bed. In the attached drawings, the upper surface of the bed body 10 is opened, but if this is configured to be appropriately closed, the possibility that the cushion will fall can be prevented.

Here, in the bed of this embodiment, since the upper surface of the rotating body 20 and the upper surface of the bed body 10 at the ascending position are set to be substantially the same height, the upper surface of the rotating body 20 is used. A cushion can be placed on the lever.

In the bed of the present embodiment, the rotating body 2
Since the 0 and the movable body 40 are arranged on both sides of the bed, there is also an advantage that the width of the bed can be elongated even if the height of the bed, that is, the width of the rotating body 20 is restricted.

To return the queen-size bed of the present embodiment to the single size, the movable body 40 is once pulled out, returned to the state shown in FIG. 5, and then the rotating body 20 is pushed in by hand. The moving body 20 and the movable body 40 may be appropriately returned to the initial state. When one of the two movable bodies 40 is pulled out, a double-sized bed (having a length and a width of, for example, about 2 m and 1.6 m, respectively) can be provided.

Next, a second embodiment of the bed according to the present invention will be described with reference to FIGS. Here, FIG. 7 is a view showing a state in which the movable body is pushed in the second embodiment of the bed according to the present invention, and FIG. 8 is a drawing of the movable body in the second embodiment of the bed according to the present invention. 9 is a side view of FIG. 7, FIG. 10 is a plan view of FIG. 7, and FIG. 11 is a schematic cross-sectional view taken along line CC of FIG.

The bed of the first embodiment described above rotates the rotating body by a moving mechanism (damper), but the bed of the second embodiment does not include a moving mechanism and is manually rotated. The first embodiment is greatly different from the first embodiment in that the rotation operation is performed. That is, the bed according to the present embodiment includes a bed body 2 and a width direction of the bed body 2 (FIG. 1).
Rotating bodies 5 and 5 disposed laterally and outwardly in the right and left direction (in the right and left directions), movable bodies (slide bodies) 4 and 4 disposed outside the rotating bodies 5 and 5, respectively, Main components are rotating member support members 6 and 6 (support portions) provided at the upper end of the rotary member 4.

The bed body 2 is a box-shaped body 1 having an open top.
00 (the bottom wall is indicated by reference numeral 100a) and a plurality (three in this example) of cushion bodies 3a, 3b, 3c detachably mounted on the box-shaped body 100, Each of the cushions 3a, 3b, 3c has a configuration in which a tatami 70 is provided on a base 80 of, for example, wood, but a mat may be used instead of the tatami. Box 1
A plurality of support members 90 are provided on the inner surface of the opening end portion of 00, and the cushion members 3 a, 3 b, and 3 c are supported by the upper ends of the support members 90 and the box-shaped body 100. A pair of movable members 4 and 4 are slidable relative to the bed body 2 by a guide mechanism similar to that shown in FIG. That is, since the movable body 4 is attached to the bed body 2 via the guide mechanism, the movable body 4 is configured to be able to separate and approach the bed body 2. The height of the movable body 4 is substantially equal to the height of the bed body 2. Reference numeral 50,
Reference numeral 51 denotes a head-side board and a foot-side board, respectively. Guide members 60 and 61 for guiding the front wall 4a and the rear wall 4b of the movable body 4 are provided on the bed-side board 50 and the foot-side board 51, respectively. Each is provided.

The rotating body 5 includes cushion bodies 3a, 3b, 3
As in the case of c, it is a rectangular plate composed of a base 5a and a tatami mat 5b, and its width (length in the vertical direction in FIG. 11) is shorter than the height of the bed body 2. The length of the rotating body 5 (the length in the vertical direction in FIG. 10)
Is substantially the same as the length of the cushion bodies 3a, 3b, 3c. One end of the rotating body 5 is attached to the upper end of the bed body 2 by a plurality of hinges 8. Thereby, the rotating body 5 has its free end (other end).
Are mounted on the bed body 2 so as to be able to rotate in the forward and reverse directions so as to move up and down. When the free end of the rotating body 5 is raised (the state shown in FIGS. 13 and 14), the upper surface of the rotating body 5 and the cushion bodies 3a, 3
They are arranged so that the upper surfaces of b and 3c are located on substantially the same plane. Two handles 7, 7 (for example, formed of a string) are attached to the free end of each rotating body 5, and when the rotating body 5 is rotated, the two handles 7, 7 are formed.
7 can be held with one hand, and the rotating body 5 can be easily raised and lowered.

The movable body 4 has a plurality of legs 70a, 70b, 70c extended to a position where the movable body 4 can touch the floor. One end in the width direction of the rotating body support member 6 is rotatably attached to the upper end of the movable body 4 via a plurality of pins 9, and the rotating body support member 6 falls down to the bed body 2 side. It is possible to manually rotate between a state (the state in FIGS. 10 and 11) and a state in which it falls to the opposite side (the state in FIGS. 12 to 14). The state in which the rotating body supporting member 6 is tilted to the opposite side to the bed body 2 (FIGS. 12 to 14)
State), the upper surface of the rotating body support member 6 and the movable body 4
Are located on substantially the same plane. The length of the rotating body support member 6 (the length in the vertical direction in FIG. 10) is substantially equal to the length of the rotating body 5.

Next, a method of using the bed according to the second embodiment will be described. First, when used as a single-size bed (see FIG. 7), as shown in FIG. 11, the movable body 4 is moved closer to the bed body 2 and the rotating body support member 6 is fallen to the bed body 22 side. In this state, the pair of rotating bodies 5 are not used.

Next, when this bed is to be used as a queen size (see FIG. 8), the movable body 4 is moved outward (arrow D side) on one side of the bed body 2. This amount of movement prevents the rotating body 5 from interfering with the movable body 4 when rotating the rotating body 5 to a horizontal state as described later. Thereafter, as shown in FIG. 12, on one side of the bed body 2, the rotating body support member 6 is tilted to the opposite side (the arrow F side) from the bed body 2, and the upper surface is moved to the upper end surface of the movable body 4. And almost match.

Next, as shown in FIG. 13, the rotating body 5 is rotated forward (see the arrow G) by holding the handle 7 of the rotating body 5 to temporarily hold the movable body 4 in a substantially horizontal state manually. Is moved to the bed body 2 side (arrow H side), and the free end of the rotating body support member 6 is made to substantially coincide with the free end of the rotating body 5. Here, by releasing the holding of the rotating body 5, the rotating body 5 is placed and supported on the upper surface of the rotating body support member 6 and the upper end surface of the movable body 4.

As described above, on one side of the bed body 2, one of the rotating bodies 5 is arranged at the same height beside the cushion bodies 3a, 3b, 3c, so that a double-size bed is obtained. . The same operation as the above operation is performed on the other side of the bed body 2 so that the rotating bodies 5, 5 are arranged at the same height on both sides of each of the cushion bodies 3a, 3b, 3c. In this way,
The bed of the present embodiment can be used as a queen size bed.

To return the queen-size bed of the present embodiment to the single-size bed, an operation almost reverse to the above operation may be performed. That is, in FIG.
The rotating body 5 is temporarily held in a horizontal state by holding the handle 7, and once the movable body 4 is once moved away from the bed body 2, the rotating body 5 is reversely rotated to descend. Thereafter, the rotating body supporting member 6 is moved down to the bed main body 2 side, and the movable body 4 is brought closer to the bed main body 2 side to return to the state shown in FIGS.

Next, a third embodiment of the extendable bed according to the present invention (the techniques of claims 11 to 17) will be described with reference to FIG.
This will be described with reference to FIGS. FIG. 15 is a perspective view showing a third embodiment of the bed of the present invention in a single size state, FIG. 16 is a perspective view showing a state in which one top plate is opened in FIG. 15, and FIG. FIG. 18 is a perspective view showing a state of the bed of the third embodiment of the present invention immediately before the bed is double-sized, and FIG. 18 is a perspective view showing a state of the bed of the third embodiment of the present invention having a queen size. ,
FIG. 19 is a side view of FIG. 15, showing a state in which a part of the top support for extension is broken, and FIG. 20 is a plan view in which a part of FIG. 15 is sectioned.

The bed of the second embodiment (FIGS. 7 to 1)
In 4), the movable body and the rotating body are not mechanically connected at all, and the movable body and the rotating body are individually moved. However, the bed of the third embodiment has the movable body 19 ( When the extension top plate support is moved, the rotating body 18 (extension top plate) rotates in conjunction therewith, and furthermore, this turning operation is promoted by the urging mechanism 38. This point is significantly different from the second embodiment. Hereinafter, the detailed structure and usage of the third bed will be described in detail.
The bed of the third embodiment also has a symmetric structure in the width direction.

As shown in FIGS. 15 to 20, three top plates 13a, 13b, and 13c (cushion bodies) are placed on the upper end of a box-shaped single-size bed main body 1 having an open upper surface. The top plates 13a and 13c on both sides are attached to the bed body 1 by opening and closing fittings 14 so as to be openable and closable. That is, the bed body 1 is a box-shaped body having an open top (the bottom wall is indicated by reference numeral 1a).
A plurality of support members 24 are provided on the inner surface of the open end of the box-shaped body, and each support member 24, the upper end of the bed body 1, and the partitioning plates 14a, 14b to be described later.
Support the top plates 13a, 13b, 13c.
Each of the top plates 13a, 13b, and 13c has a configuration in which a tatami 23 is provided on a base 22 made of, for example, wood, but a mat may be used instead of the tatami.

In the bed body 1, 2 extends in the width direction thereof.
The two partitioning plates 14a and 14b are arranged, whereby the space in the bed body 1 is divided into approximately three equal parts,
Desired articles such as futons can be stored in each space. The bed body 1 is provided with predetermined side wall plates, bottom wall plates, and partitioning plates 14.
a, 14b, etc. are connected to each other by appropriate fittings (not shown) and can be assembled freely. Further, the side wall plate members and the partition plates 14a, 14b, and the top plates 13a, 1
Since a perforated board having a large number of through holes 35 is used as the bases 22 and the like of 3b and 13c, the air permeability of the space in the bed body 1 is good.

A main headboard 15 and a main footboard 16 are respectively provided on the floor in front of and behind the bed body 1 installed on the floor, and on both sides in the width direction of the main headboard 15, respectively. Sub headboards 57a and 57b are provided on the floor, and sub footboards 58a and 58b are provided on both sides in the width direction of the main footboard 16, respectively.

On the side and outside of the bed body 1 in the width direction (the left-right direction in FIG. 20), the expansion top plates 18 and 1 are provided.
8 (rotating body) are arranged, and on the outer sides of the expansion top plates 18, 18 are provided expansion top plate supports 19, 19 (movable bodies), respectively. The extension top plates 18 and 18 are rotatably attached to the bed body 1 in the forward and reverse directions so that their free ends move up and down.
8 and 18 are in a state where their free ends are raised (FIG. 2).
3), the upper surfaces of the expansion top plates 18, 18 and the upper surfaces of the top plates 13a, 13b, 13b of the bed body 1 are placed on the expansion top plate supports 19, 19 so as to be located on substantially the same plane. Supported. The expansion top supports 19, 19 are configured to be separated and approachable in the width direction with respect to the bed body 1, and the expansion top supports 19, 19 , 18 are in the raised position and are provided with top plate support portions 21, 21 for abutting on their free ends to prevent the expansion top plates 18, 18 from lowering.
The top support portions 21 and 21 are provided with extension top support members 19 and 19.
It is rotatably attached to the upper end of the.

A movable head board 24a and a movable foot board 24b are fixed to the front end and the rear end of each of the expansion board supports 19, 19, respectively. Movable headboard 2
4a is supported movably in the width direction of the head body 1 with respect to the front surface of the bed body 1 and the rear surface of the sub head board 17a via the guide mechanism 25 and the like. The movable foot board 24b is movably supported in the width direction of the head body 1 with respect to the rear surface of the bed body 1 and the front surface of the sub foot board 58a via a guide mechanism or the like (not shown). With such a configuration, the left and right extension top plate supports 1 are provided.
The beds 9 and 19 are individually configured to be separated from and approachable to the bed body 1 in the width direction.

The expansion top plate 18 includes top plates 13a, 13b,
Similarly to 13c, it is a rectangular plate formed of a base 25a and a tatami mat 25b, and its width (length in the vertical direction in FIG. 21) is shorter than the height of the bed body 1. The length of the top plate for extension 18 (the length in the vertical direction in FIG. 20) is determined by the top plates 13a, 13b,
The length is almost the same as 13c. Expansion top plate 1
One end of 8 is attached to the upper end of the bed body 1 by a hinge 26 (see FIG. 21). Thereby, the top plate 18 for expansion is rotatable in the forward and reverse directions so that its free end (the other end) moves up and down.
It has been attached to. Expansion top plate 18
Indicates a state where its free end is raised (a state shown in FIG. 23).
, The upper surface of the expansion top plate 18 and the top plates 13a, 13
They are arranged so that the upper surfaces of b and 13c are located on substantially the same plane. Handles 27, 27 (for example, formed of a string) are attached to the center of the free end of each extension top plate 18, and when the extension top plate 18 is manually rotated, the handle 27 is held with one hand. The extension top plate 18 can be easily lifted. The reference numerals 27a and 27b indicate the handles of the top plates 13a and 13c, respectively.

At the upper end of the expansion top support 19, a top support 21 (support) is provided via a hinge 28 (see FIG. 21).
One end in the width direction is rotatably mounted, and the top plate support member 21 is in a state of falling down to the bed body 1 side (a state of FIG. 21) and in a state of falling down to the opposite side (the state of FIG. 22). Can be manually rotated. In a state where the top support 21 is tilted to the opposite side to the bed body 1 (the state shown in FIG. 22), the upper surface of the top support 21 and the upper end surface of the expansion top support 19 are substantially on the same plane. It is located. Note that the length of the top support 21 is substantially equal to the length of the expansion top 18.

The configuration described above is almost the same as the bed of the second embodiment, and the features of this embodiment will be described below. Since the configuration of the bed is symmetric in the width direction, only one side in the width direction of the bed will be described. This bed is moved down from the closest position (see FIG. 21) of the top support 19 for expansion to the most distant position (see FIG. 22) from the closest position (see FIG. 21) to the lowest position (see FIG. 21). Is provided with an interlocking mechanism 29 for turning the expansion top plate 18 upward to make it substantially horizontal. This interlocking mechanism 2
9 are roller members 33 provided at both ends in the length direction of the expansion top plate 18 and held at either the retracted position or the extended position, and the inner surfaces of the movable head board 24a and the movable foot board 24b. And guide grooves 36 for guiding the respective roller members 33 with the movement of the top support 19 for expansion. ing.

When each roller member 33 is located at the upper end of the arc-shaped guide groove 36 (see FIG. 28C), the expansion top plate 18 is in a substantially horizontal state. In this example, the roller member 33 is moved to the retracted position (the dashed line 33 in FIG. 20) or the extended position (FIG.
0 is a bearing attached to the tip of a pin 34 held by a solid line 33). In addition, the movable head board 24
a and the inner surface of each of the movable foot boards 24b,
A linear guide groove 37 that communicates with the upper end of the arc-shaped guide groove 36 and extends horizontally outward in the width direction of the bed body 1
Are formed respectively. This linear guide groove 37
Are for guiding the roller members 33 when the top support 19 for expansion moves from the most distant position (FIG. 22) to the expansion position (FIG. 23). In one movable head board 24a, an arc-shaped guide groove is formed by the arc-shaped guide groove 36 and the linear guide groove 37, and in the other movable foot board 24a, an arc-shaped guide groove is formed. The groove 36 and the linear guide groove 37 constitute a groove having a shape that is substantially inverted inside the letter “F” (FIG. 12).
reference). The form of the guide groove of the pair of movable head boards 24b, 24b is also determined by the pair of movable head boards 24a, 24a
Is similar to When the roller member 33 is at the withdrawal position, the guide groove 36 (or 37)
When it enters and moves to the retracted position, it comes out of the guide groove 36 (or 37).

Another feature of the present embodiment is that, as shown in FIGS.
And two urging mechanisms 38 (see FIGS. 26 and 27) are interposed therebetween.
When the expansion top plate 18 at the lowest position (see FIG. 24) is rotated by a small angle, the expansion top plate 18 is urged in the direction of further rotation. The urging mechanism 38 is in a state in which the expansion table 18 is slightly inclined downward from the horizontal state when the expansion table support 19 is at the farthest position (FIG. 26).
(See reference).

The urging mechanism 38 will be described in detail. The urging mechanism 38 is used for the partitioning plate 14 of the bed body 1.
a (14b). When the urging mechanism 38 is in the closed state (see FIG. 24), the urging mechanism 38 is located in the concave portion 14c between the side walls in the width direction of the head main body 1 (see FIG. 20). Does not interfere with the top plate 18 for expansion.

As shown in FIGS. 24 to 27, the main components of the urging member 38 are the partitioning plate 14a of the bed body 1.
A fixed bracket 39 having a concave cross section (groove) fixed to the side end surface of (14b) by a screw or the like, and is rotatably connected to the upper end of the fixed bracket 38 in the up-down direction by a pin 42a or the like, and the bed Arm member 43 having a concave (groove) cross section fixed detachably to the rear surface of extension top plate 18
And one end of the pin 4
4, a link member 45 having a concave cross section (groove shape) in which the other end thereof is in contact with the arm member 43 at the other end thereof, and the vicinity of the upper end of the fixing bracket 39 (the pin 42a in this example). And the other end of the link member 45, and when the arm member 43 at the lowest position is slightly rotated, the arm member 43 is urged in the direction of further rotation, slightly from the horizontal state. And a tension coil spring 46 which is held in a downwardly inclined state.

FIG. 24 and FIG. 27, which is a cross-sectional view taken along the line II, show a state in which the urging member 38 is closed. The cross-sectional dimension of the link member 45 is smaller than that of the fixing bracket 39. Therefore, the link member 45 can be stored in the fixed bracket 39. Since the cross-sectional dimension of the arm member 43 is smaller than that of the link member 45, the arm member 43 can be stored in the link member 45. In the state shown in FIG. 24, the axis of the tension coil spring 46 (dashed line 46a) is on the right side of the pivot (pin 44) of the link member 45, so that the arm member 43 is in the extended state. As a result, the pin 42a is urged in the counterclockwise direction about the fulcrum,
The state of FIG. 24 is maintained. In this state, when the arm member 43 is rotated clockwise by a minute angle (for example, about 5 °), first, the axis of the tension coil spring 46 coincides with the rotation fulcrum (pin 44) of the link member 45 (see FIG. 25). ,
When the axis exceeds the rotation fulcrum (pin 44), the tension coil spring 46 urges the arm member 43 to rotate clockwise, and holds the arm member 43 in a state where the arm member 43 is slightly inclined downward from the horizontal state. (FIG. 26).

A method for using the bed according to the third embodiment will be described. First, when used as a single-size bed (see FIGS. 16, 16, 20, and 21), as shown in FIG.
Numeral 8 is at a position closest to the bed body 1, and a pair of expansion top plates 18, 18 are at a lowest position where they hang down in a substantially vertical direction (see FIG. 24). At this time, each urging fitting 38 is in a closed state, and does not exert an urging force on the top plate 18 for expansion. Further, each roller member 33 at the position where the top plate 18 for extension is pulled out is located at the lower end of the arc-shaped guide groove 36 (see FIG. 28A).

Next, when this bed is used as a double size (see FIG. 17), as shown in FIG. 22, one side in the width direction of the bed main body 1 is located closest to the bed main body 1. The top support 19 for extension is pulled out in the width direction of the bed main body 1 by human power and moved to a position farthest away from the bed main body 1. At this time, the following operation is performed. That is, with the movement of the top support 19 for expansion, each roller member 33 of the top plate 18 for expansion is guided by the arc-shaped guide groove 36 of the movable head board 24a and the movable foot board 24b before and after the top support 19. Therefore, the extension top plate 18 gradually rotates clockwise in conjunction with the movement of the extension top plate support 19. Then, the arm member 43 of the urging member 38 also rotates clockwise by a small angle (for example, about 5 °), and the axis of the tension coil spring 46 is pivoted at the pivot (pin 4).
When 4) is exceeded (see FIG. 25 for the state immediately before), the tension coil spring 46 urges the arm member 43 to rotate clockwise. As described above, the manpower required to pull out the top board support 19 for expansion from the time when the urging force of the tension coil spring 46 acts is greatly reduced.

When the extension top plate support 19 is at the farthest position, as shown in FIG. 28B, each roller member 33 of the extension top plate 18 is located near the upper part of the curved guide groove 36. The extension top plate 18 is slightly inclined (for example, about 10 °) downward from the horizontal state (see FIG. 26). When the top support for extension 19 is moved to the farthest position, the top support 21 is tilted to the opposite side (the arrow J side) from the bed body 1 and the upper surface of the top support 19 is extended. Align with the top surface of

Next, as shown in FIG.
When the handle 8 at its free end is lifted slightly above the horizontal state and held by hand, the extension top plate 18 is held.
Is located at the upper end of the arc-shaped guide groove 36 (see FIG. 28C). Here, the top support 1 for extension
9 is pushed into the bed body 1 and moved to the extended position, and the hand is released from the expansion top plate 18 and placed on and supported on the upper surface of the expansion top plate support 19 and the top plate support 21. The upper surface of the expansion top plate 18 is the top plate 13 of the bed body 1.
a, 13b, and 13c, so that they are double beds. When the extension top support 19 is pushed in, the movable head board 24a and the movable foot board 2
Each roller member 33 of the expansion top plate 18 relatively moves while rotating in the linear guide groove 37 of 4b. And
When the expansion ceiling support 19 reaches the expansion position, the roller member 33 is positioned at one end of the linear guide groove 37 (see FIG. 28D).

In order to return the double-sized bed of the present embodiment to the single-sized bed, an operation almost reverse to the above operation may be performed. That is, first, the extended position (FIG. 23)
Is moved to the farthest position (FIG. 22), the roller member 3 of the
3 relatively moves while rotating along the linear guide grooves 37 of the movable head boards 24a and 24b, and reaches the other end of the linear guide grooves 37 (see FIG. 28C). Then, although the expansion top plate 18 is urged upward by the urging fitting 38, the expansion top plate 18 pivots slightly downward by its own weight and tilts, and the roller member 33 becomes an arc-shaped guide groove. 36 (see FIG. 28B).

Thereafter, the top support 21 is moved down to the bed body 1 side, and the expansion top support 19 is pushed into the bed body 1 against the urging force of the urging bracket 38 to reach the closest position. Move (see FIG. 21). That is, with the movement of the expansion top plate support 19, the expansion top plate 18 is moved while the roller members 33 thereof are guided by the arc-shaped guide grooves 36.
It rotates downward against the urging force of the urging fitting 38. As a result, the state shown in FIG. 15 is obtained, and a single-size bed is obtained.

The queen size can be obtained by enlarging both sides in the width direction of the bed body 1 that cause the expansion top plates 18 on both sides of the bed body 1 (see FIG. 18). In addition,
The bed of the present embodiment is of an assembling type. For example, when the bed is disassembled for moving or the like, each roller member 3
3 is retracted and the engagement with the guide groove 36 is cut off, and then the extension top plate 18 is removed from the bed body 1.

The bed of the third embodiment is different from the bed in which the movement of the expansion top support 19 and the rotation of the expansion top 18 are individually moved by interlocking the movement. Therefore, bed expansion work and bed contraction work become easy. Moreover, only when the top support for extension 19 moves from the closest position to the farthest position, the top support for extension 19 and the top for extension 18 interlock with each other, and When the extension 19 is moved from the most distant position to the extension position, the extension top support 19 and the extension top 18 are not interlocked with each other.
It is safe from accidentally pinching your hand.

When moving the extension top plate support 19 from the farthest position to the extension position, the movable head board 24
The roller members 33 at both ends of the expansion top plate 18 are guided by the horizontal linear guide grooves 37 of the movable footboard 24a and the movable foot board 24b. It is not necessary to hold the plate 18 separately, and the extension top plate support 19 can be easily moved. Further, when the extension top plate support 19 is moved away from the bed body 1 to the farthest position, the extension top plate 18 is turned upward by the interlocking mechanism 29 as described above. From an initial stage, the expansion top plate 18 is urged by an urging mechanism 38 to rotate upward. Therefore, the force required to move the expansion top support 19 away from the bed body 1 is greatly reduced, and the workability when expanding the bed is improved.

In each of the above embodiments, the movable body and the rotating body are arranged on both sides in the width direction of the bed body. However, they may be arranged on only one side in the width direction, or may be arranged on both sides in the length direction of the bed body. Alternatively, the length may be extended by disposing a movable body or a rotating body on one side.

[0076]

Since the present invention is configured as described above, it has the following effects. According to the first aspect of the present invention, first, the movable body is moved in a direction away from the bed main body (that is, outside), and then the rotating body is rotated to raise its free end, so that the upper surface of the rotating body is raised. And the upper surface of the bed body are positioned on substantially the same plane. Then, the movable body is slightly moved to the bed body side, and the lowering of the rotating body is prevented by the support portion, so that the movable body can be reliably held at the above-mentioned raised position. Thus, by pulling out the movable body to the outside, the width or length of the bed can be changed, the user's body can be supported by the rotating body, and usability as a bed is improved.

According to the second aspect of the present invention, the rotating body can be easily rotated by holding the handle.

According to the third aspect of the present invention, by moving the movable body outward, the rotating body can be automatically raised by the pushing force of the moving mechanism.

According to the fourth aspect of the present invention, the raised rotating body can be easily stopped at the specified position.

According to the invention described in claim 5, the movable body can be smoothly moved by the guide mechanism.

According to the sixth aspect of the present invention, even when the height of the bed is constant, the amount of increase in the width or length of the bed can be increased.

According to the seventh aspect of the present invention, the rotating body can be raised smoothly with the movement of the movable body.
Work to enlarge the width and length of the bed is easy.

According to the eighth aspect of the present invention, the rotating body can be raised more smoothly.

According to the ninth aspect of the present invention, even when the weight of the user is applied to the movable body, it becomes easier to reliably receive the weight.

According to a tenth aspect of the present invention, after the movable body is once pulled out and the rotating body is moved above the projection,
By slightly pushing the movable body, the rotating body can be arranged above the support. Therefore, the rotating body can be supported by the upper surface of the support portion.

According to the eleventh aspect of the present invention, the movement of the extension top plate support and the rotation of the extension top plate are linked to each other, so that they can be individually moved,
Bed expansion work and bed contraction work are facilitated. In addition, only when the top support for extension moves from the closest position to the farthest position, the top support for extension and the top for extension work together, and the top support for extension is moved from the most distant position. During the final process of moving to the extended position, the extension top support and the extension top are not linked, so that your hand may be accidentally pinched between the extension top support and the extension top. Not safe.

According to the twelfth aspect of the present invention, the bed is symmetrical in the width direction by providing the expansion top plate and the expansion top plate support which are linked to each other on both sides in the width direction of the bed body. Can be extended to

According to the thirteenth aspect of the present invention, the interlocking mechanism can have a simple and inexpensive structure including a roller member and a guide groove. Further, for example, when disassembling the bed for moving or the like, the top plate for expansion can be removed from the bed main body after each roller member is retracted and the engagement with the guide groove is cut off.

According to the fourteenth aspect of the present invention, when the extension top support is moved from the most distant position to the bed body to the extension position, both ends of the extension top plate are inserted into the horizontal linear guide grooves. Since the roller member is guided, it is not necessary to separately hold the expansion top plate during the movement of the expansion top plate support, and the expansion top plate support can be easily moved.

According to the fifteenth aspect of the present invention, when the extension top support is moved away from the bed body to the farthest position, the extension top is rotated upward by the interlocking mechanism as described above. However, from the initial stage of this rotation, the expansion top plate is urged by an urging mechanism to rotate upward. Therefore, the manpower required to move the extension top support away from the bed body is greatly reduced, and the bed extension operation becomes extremely easy.

In the invention according to claim 16, after the extension top support is moved to the farthest position, the free end of the extension top is manually lifted to bring the extension top to a substantially horizontal state. Here, the extension top support is pushed into the bed main body side to set the extension position, and the hand is released from the extension top and placed on the extension top support. Therefore, the hand is less likely to be caught between the upper end of the top support for extension and the free end of the top plate for extension. The invention described in claim 17 can provide an inexpensive biasing mechanism having a simple configuration.

[Brief description of the drawings]

FIG. 1 is a plan view of a first embodiment of a bed according to the present invention.

FIG. 2 is a schematic cross-sectional view taken along line AA of FIG.

FIG. 3 is a schematic enlarged sectional view taken along line BB of FIG. 1;

FIG. 4 is a view corresponding to FIG. 2, showing a state in which a movable body is pulled out for explaining a method of using a bed.

FIG. 5 is a view corresponding to FIG. 2, showing a state immediately before the movable body is pushed in, for explaining a method of using the bed.

FIG. 6 is a view corresponding to FIG. 2, showing a state of a queen-size bed.

FIG. 7 shows a second embodiment of the bed according to the present invention;
It is a figure showing the state where the movable body was pushed in.

FIG. 8 shows a second embodiment of the bed according to the present invention;
It is a figure showing the state where a movable body was pulled out.

FIG. 9 is a side view of FIG. 7;

FIG. 10 is a plan view of FIG. 7;

11 is a schematic sectional view taken along line CC of FIG.

FIG. 12 is a view corresponding to FIG. 11, showing a state in which a movable body is pulled out for explaining a method of using a bed.

FIG. 13 is a view corresponding to FIG. 11, illustrating a state immediately before the movable body is pushed in, for explaining a method of using the bed.

FIG. 14 is a view corresponding to FIG. 11, showing a state of a queen-size bed.

FIG. 15 is a perspective view showing a state in which the bed according to the third embodiment of the present invention is in a single size.

FIG. 16 is a perspective view showing a state in which one top plate is opened in FIG.

FIG. 17 is a perspective view showing a state immediately before a double size in the third embodiment of the present invention.

FIG. 18 is a perspective view showing a state where the bed according to the third embodiment of the present invention has a queen size.

FIG. 19 is a side view of FIG. 15, showing a state in which a part of the top support for extension is broken.

FIG. 20 is a plan view showing a part of FIG. 15 in section;

FIG. 21 is a sectional view of a main part of FIG.

FIG. 22 is a sectional view of a main part of FIG.

FIG. 23 is a sectional view of a main part of FIG. 18;

FIG. 24 is a front view of the urging mechanism (urging metal fitting) in a closed state.

FIG. 25 is a front view of the urging mechanism (urging bracket) opened at a small angle.

FIG. 26 is a front view of the urging mechanism (urging bracket) in an open state.

FIG. 27 is a sectional view taken along line II in FIG. 24;

FIG. 28 is a view for explaining a positional relationship between a guide groove of a movable head board and a roller member.

[Explanation of symbols]

 2 Bed body 3a, 3b, 3c Cushion body 4,19 Movable body 5,18 Rotating body 6,21 Rotating body support member (supporting part) 7 Handle 10 Bed body 13a, 13b, 13c Top plate 18 Expansion top plate 19 Expansion Top support 20 for rotating body 21 Rotating body 21 Top support 24a Movable headboard 24b Movable footboard 29 Interlocking mechanism 30 Moving mechanism 33 Roller member 36, 37 Guide groove 38 Urging mechanism (metal) 39 Fixed bracket 40 Movable body 41 Contact part 42 Support part 43 Arm member 45 Link member 46 Tension coil spring

Claims (17)

(57) [Claims] 1. A bed comprising: a bed body; a rotating body disposed laterally and outside the bed body; and a movable body disposed outside the rotating body, wherein the rotating body includes the bed The free end is attached to the main body so as to be rotatable in the forward and reverse directions so that the free end moves up and down, and the rotating body has the free end raised and the upper surface of the rotating body and The upper surface of the bed body is disposed so as to be located on substantially the same plane, the movable body is configured to be separated and approachable to the bed body,
Further, the bed is characterized in that the movable body has a support portion for preventing the lowering of the rotating body by contacting the free end when the rotating body is at the raised position. 2. The bed according to claim 1, wherein a handle is provided near a free end of the rotating body. 3. The bed according to claim 1, further comprising a moving mechanism for pushing up and rotating the rotating body. 4. A structure wherein the movable body may include a contact portion for stopping a rise of a free end of the rotating body against a pushing force applied to the rotating body from the moving mechanism. 4. The bed according to claim 3, wherein the bed is formed. 5. The bed according to claim 1, wherein the bed body includes a guide mechanism for guiding the movement of the movable body. 6. The bed according to claim 1, wherein the rotating body and the movable body are respectively arranged on both sides of the bed. 7. The bed according to claim 3, wherein the moving mechanism is a damper having a pushing force. 8. An end of the damper having the pushing force is rotatably mounted on the bed body, and the other end of the damper having the pushing force is rotatably attached to the rotating body. The bed according to claim 7, wherein the bed is provided. 9. The apparatus according to claim 1, wherein a lower end of the movable body is extended to a position where the movable body can touch the floor.
A bed according to any one of claims 1 to 8. 10. The bed according to claim 1, wherein the support portion protrudes from the movable body toward the bed body or in a direction opposite to the bed body. 11. A bed main body provided with a top plate, and mounted outside the upper end of the bed main body so as to be rotatable in forward and reverse directions so that a free end of the bed main body moves up and down, and in a horizontal state. A top plate for extension whose upper surface is located on substantially the same plane as the top surface of the top plate at one time, and provided on the outside of the bed body so as to be movable in the width direction thereof, and closest to the bed body. An expansion top plate support for supporting the expansion top plate in a horizontal state when in an expansion position between the closest approach position and the most distant position; and An interlocking mechanism that interlocks with the movement from the closest position to the most distant position, turns the expansion top plate at the lowest position upward to make it almost horizontal, and an interlocking mechanism. Bed. 12. The expansion table and the expansion table support are respectively provided on both sides in the width direction of the bed body, and each expansion table is connected to each expansion table by a separate interlocking mechanism. The bed according to claim 11, wherein each of the beds cooperates with the plate support. 13. A movable head board and a movable foot board, which are movable in the width direction with respect to the bed main body, in front of and behind the extension top support, respectively. Roller members provided at both ends in the length direction of the top plate and held at any of the retracted position and the extended position, and formed on the inner surfaces of the movable headboard and the movable footboard, respectively, Arc-shaped guide grooves for guiding each roller member along with the movement of the top plate support for expansion while the respective roller members at the pulled-out position are fitted therein, and each roller member is formed of the arc-shaped member. 13. The bed according to claim 11, wherein the expansion top plate is substantially horizontal when located at the upper end of the guide groove. 14. An inner top surface of each of the movable head board and the movable foot board, which communicates with an upper end of an arc-shaped guide groove and moves the expansion top support from the most distant position to the expansion position. 14. The bed according to claim 13, wherein a linear guide groove extending in a horizontal direction for guiding each roller member is formed. 15. When the expansion couch at the lowest position is interposed between the expansion couch and the expansion couch support and rotated by a small angle, the expansion couch is further rotated. 12. An urging mechanism for urging in a moving direction.
The bed according to any one of claims 14 to 14. 16. The bed according to claim 15, wherein when the extension top support is at the farthest position, the extension top is inclined slightly downward from a horizontal state. 17. The urging mechanism is connected to a fixing bracket fixed to the bed main body, and to the upper end of the fixing bracket so as to be vertically rotatable, and is fixed to the back surface of the extension top plate. An arm member, a link member one end of which is vertically rotatably connected to a substantially halfway portion of the fixed bracket, and the other end of which is in contact with the arm member;
When the arm member at the lowest position, which is suspended between the upper end portion of the fixed bracket and the other end portion of the link member, rotates by a small angle, the arm member is urged in the direction of further rotation. 17. The bed according to claim 15 or 16, further comprising a tension coil spring that is substantially horizontal.