JP3056036B2 - Furniture - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sofa, a bed or similar furniture provided with a caster device below.

[0002]

2. Description of the Related Art For example, in the case of furniture that can be moved, such as a sofa or a bed, a caster device may be provided at the lower end of the furniture to facilitate the movement.

As is well known, a conventional caster device has a metal fitting attached to the lower end of furniture, and a roller is rotatably mounted on the metal fitting to prevent rotation of the roller. Is provided. When it is desired that the furniture cannot be moved at a predetermined position, the stopper is operated to prevent the rotation of the roller.

[0004] However, in furniture using such a caster device, when it is desired to use the furniture in a state where movement of the furniture is prevented, the stopper must be operated each time. Therefore, the operation of the stopper may be troublesome. In addition, the user may forget to operate the stopper or use it without intentional operation, and the furniture may move during use.

[0005]

As described above, when furniture can be moved, when the furniture is used in a stationary state, the caster device provided under the furniture must be operated in a locked state. The caster device may be difficult to use, or the operation of the stopper may be forgotten, and the caster device must be released from the locked state to be movable. .

The present invention has been made on the basis of the above circumstances, and an object thereof is to make it impossible to move by applying a load during use, and to easily move when no load is applied when not in use. To provide such furniture.

[0007]

According to a first aspect of the present invention, there is provided a furniture which is movably supported by a caster device attached to a lower portion of a furniture body, wherein the caster device has a lower end surface. With an open holder,
A movable body movably provided in the holder, a main ball rotatably provided on a lower end side of the movable body, and a movable ball elastically holding the movable body and being compressed by a load applied to the holder. And an elastic body that allows the holder to be displaced downward in accordance with the amount of compression. The furniture body has a mounting portion having an outer shape formed in a truncated cone shape, and an inside of the mounting portion. A mounting tool having a tubular portion formed is attached, the caster device is housed in the tubular portion, and at the lower end surface of the tubular portion, the caster device is prevented from falling off from the tubular portion. Furniture is provided with a holding member provided with an opening for projecting the main ball.

[0008]

According to the above construction, the furniture main body can be moved by rotating the main ball when no load is applied to the furniture main body. When the load is applied to the furniture main body, the spring is compressed and the holder is moved. Since the main ball is lowered, the main ball relatively enters the holder, and the lower end surface of the holder is in contact with the floor, so that the movement of the furniture body by the main ball is prevented.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of the present invention, and FIG. 2 shows a bed 1 as furniture. This bed 1
Has a base 2 as a furniture body. The base 2 is formed by connecting a head board 4 to one longitudinal end of a pair of side plates 3 (one shown) separated in parallel, and a foot board 5 to the other end. A receiving bar 6 is provided on the inner surface of each side plate 3 over substantially the entire length in the longitudinal direction, and a floor plate 7 is installed on the pair of receiving bars 6 by engaging both ends in the width direction. In addition,
The floor plate 7 is divided into two in the longitudinal direction of the base 2. A mattress 10 is placed on the floor plate 7.

A connecting member 8 shown in FIG. 3 is used for connecting the side plate 3 to the head board 4 and the foot board 5. The connecting tool 8 has a connecting plate 11 bent in an L-shape, and one side and the other side of the connecting plate 11 have through holes 12 respectively.
Are formed.

One side of the connecting plate 11 is joined to the inner surface of the side plate 3 and the other side is a head board 4 or a foot board 5.
Is bonded to the inner surface. Then, the screws 8 are screwed into the boards 4 and 5 from the through holes 12 on each side, so that the attachments 8 are attached to the four corners of the base 2 respectively.

In the middle of one side of the mounting member 8, a cylindrical mounting portion 14 having an open lower end surface is formed. The caster device 15 is inserted and held in the mounting portion 14. As shown in FIGS. 1A and 1B, the caster device 15 has a cylindrical holder 16 having an upper end surface closed and an open lower end surface.
Having.

The holder 16 has an outer diameter slightly smaller than an inner diameter of the mounting portion 14.
A movable body 17 formed in a cylindrical shape by an elastic material such as a synthetic resin is slidably accommodated therein. The movable body 17 is prevented from being pulled out of the holder 16 by a stopper 18 provided on the lower end surface of the holder 16.

A spherical housing portion 19 is formed on the lower end surface side of the movable body 17, and a main ball 21 formed of hard synthetic resin or rubber is housed and held in the housing portion 19. ing.

The inner diameter of the portion of the housing 19 that is open to the lower end surface of the movable body 17 is set slightly smaller than the diameter of the main ball 21. The main ball 21 is press-fitted into the housing portion 19 and is held so as not to fall. Part of the movable body 17 is the accommodation section 1.
An annular groove 22 that is open at 9 is formed. The annular groove 22 accommodates a number of bearing balls 23 whose diameter is sufficiently smaller than that of the main ball 21. Therefore, the main ball 21 is rotatably supported by the bearing ball 23.

An elastic sheet 24 made of rubber, synthetic resin, or the like is provided on the inner surface of the upper end of the holder 16, and the movable member 17 is provided between the elastic sheet 24 and the upper end surface of the movable member 17. An elastic body such as a rubber or a spring for urging the spring downward, in this embodiment, a spring 25 is provided. As a result, the main ball 21 projects from the lower end surface of the holder 16, and the projecting position is such that the lower end surface of the movable body 17 is
Is restricted by abutting against a stopper portion 18 provided at the lower end of the cover. That is, the movable body 17 is prevented from dropping from the holder 6 by the stopper portion 17.

When the bed 1 is provided with four caster devices 15, the total strength of the four springs 25 of these caster devices 15 is substantially equal to the load of the bed 1 in the first state, that is, the first state is slightly larger. 2 or a slightly smaller third state. In the first and second states, since the holder 16 of the caster device 15 hardly descends and the main ball 21 protrudes from its lower end surface, the bed 1 is moved by the rotatable main ball 21. It is freely supported.

In the third state, the holder 16 descends due to the load of the bed 1 and the main ball 21 enters the holder 16, so that the lower end surface of the holder 16 contacts the floor surface, Bed 1 cannot be moved freely. Therefore, in that case, the bed 1 may be moved so as to be lifted.

Note that, even in the second state, the holder 16
In such a case, the bed 1 may be lifted and moved in such a case, but since the spring 25 is stronger than in the case of the third state, The bed 1 can be lifted with a light force.

According to the bed 1 using the caster device 15 having such a configuration, when the user is not lying on the mattress 10, only the load of the bed 1 is applied to the caster device 15. In that case, if the strength of the spring 25 of the caster device 15 is set to the first state described above,
Since the main ball 21 projects from the lower end surface of the holder 16, the bed 1 can be freely moved.

When the user lies on the mattress 10 of the bed 1, the load of the bed 1 and the user is applied to the caster device 15. When the load increases, the holder 16 moves down together with the bed 1 while compressing the spring 25. Thereby, the main ball 21 relatively sinks into the boulder 16,
Since the stopper 18 provided on the lower end surface of the holder 16 is in contact with the floor, the bed 1
Is prevented from moving.

That is, the bed 1 can be freely moved by the caster device 15 when not in use, and the caster device 15 is automatically locked and immobilized by the load of the user during use. Therefore, the user does not have to perform operations such as locking or releasing the lock state each time the caster device 15 is used, so that the user is convenient and the bed 1 moves during use by forgetting to lock. It is possible to eliminate such a situation.

The load applied to the caster device 15 during use differs depending on the weight of the user and the structure of the bed 1, for example, single size or double size. As described above, when the load applied to the caster device 15 fluctuates, the caster device 15 can be dealt with by replacing the caster device 15 with a spring having a different strength.

FIGS. 4 and 5 show a second embodiment of the present invention. The same portions as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. That is, in this embodiment, the holder 16A forming the caster device 15A is formed integrally with the mounting fixture 8A. That is, the attachment 8A is attached to the holder 16
A and a lower flange 32 having an L-shape with a side flange 31 on both sides of the holder 16A and the side flange 31 on a lower end thereof are integrally formed. Side flange 31
The lower flange 32 and the lower flange 32 are formed with through holes 31a for screwing.

An inner cylinder 33 is movably provided in the holder 16A. A movable body 34 is integrally attached to an upper portion inside the inner cylinder 33. A concave spherical surface 35 is formed on the lower end surface of the movable body 34,
An annular groove 36 is formed by exposing a part of the groove 5. The bearing ball 23 is housed in the annular groove 36.

A flange 37 is formed on the lower end surface of the inner cylinder 33 and protrudes in the inner diameter direction. A seal 38 such as felt or rubber is provided on the flange 37 over the entire circumference. Further, a main ball 21 is rotatably provided at a lower portion of the inner cylinder 33 such that a part thereof contacts the spherical surface 35 of the movable body 34. The main ball 21 has a part of the holder 1.
6A and the flange 3
7 prevents it from falling from the inner cylinder 33.
The dust adhering to the main ball 21 is removed from the main ball 21.
Is rotated and removed by the seal material 38.

The upper surface of the movable body 34 and the holder 16A
A spring 25 that urges the movable body 34 in a downward direction is interposed between the elastic sheet 24 provided on the inner surface of the upper end of the movable member 34. The inner tube 33 has a flange 37 at the lower end thereof and the holder 16.
The downward movement is restricted by contacting the stopper portion 39 provided on the lower end surface of A.

The mounting fixture 8A having the above structure is fixed by screws by joining the side flanges 31 to the inner surface of the furniture body, for example, the side plate 3 of the bed 1, and joining the lower flange 32 to the lower end surface. It is fixed by screwing a screw (not shown) through the through hole 31a.

Even with such a configuration, as in the first embodiment, the bed 1 can be supported by the caster device 15A when no load is applied, and is immovable when loaded.

FIG. 6 shows a third embodiment of the present invention. This embodiment shows a modification of the fixture. That is, in the fixture 8B of the third embodiment, the upper end surface of the housing portion 14A is open, and the flange 41 is formed on the inner periphery of the open end.
A side flange 42 is provided on both sides of the housing portion 14A, and a lower flange 43 is provided at a lower end of the side flange 42. The mounting fixture 8B is a furniture body via these flanges. 3 is screwed and fixed.

In such a configuration, the housing 1
The caster device 15 housed in 4A has an upper end surface exposed. Therefore, the caster device 15 housed and held in the housing portion 14A can be easily removed by pressing the exposed upper end surface of the caster device 15.

FIGS. 7 and 8 show a fourth embodiment of the present invention.
9 shows a modified example of the fixture. The attachment 8C of this embodiment includes a housing portion 14B and a mounting portion 45 provided integrally on one side of the housing portion 14B. The mounting portion 45 is formed sufficiently longer than the housing portion 14, and a long hole 46 is formed in the mounting portion 45 along the height direction.

In FIGS. 7 and 8, reference numeral 47 denotes a connection fitting for connecting the side plate 3 of the bed 1 to the boards 4, 5. This connecting metal fitting 47 is formed by bending a plate material into an L-shape, and has two hooks 48 formed on one side thereof as shown by a chain line in FIG. Fixed,
One side is engaged with a screw 51 provided on the inner surface of the widthwise end of each of the boards 4 and 5, thereby connecting the side plate 3 and the boards 4 and 5.

The mounting member 8C is fastened together with a screw 51 for fixing the hook portion 48 to the boards 4 and 5 through the long hole 46 of the mounting portion 45. Therefore, the mounting fixture 8C
Since the mounting position can be moved up and down along the screw 51 at the fixing position, the fixing position in the height direction can be adjusted.

FIGS. 9 and 10 show a fifth embodiment of the present invention. The fifth embodiment is a modified example of the caster device. The caster device 15B of this embodiment has a holder 16B having an upper end closed by a lid 55 and a stopper 56 provided on the outer periphery of the lower end. A movable body 57 is slidably provided in the holder 16B. This movable body 57
A step 58 is formed on the outer periphery of the
A locking portion 59 is formed on the inner periphery of B to engage with the step portion 58 and prevent the movable body 57 from being pulled out from the lower end surface.

The holder 6 shown in FIG.
0 is provided. The holder 60 has a ring 61
A predetermined interval in the circumferential direction from the lower end of the ring portion 61,
For example, the ring portion 61 is embedded in the movable body 57 and includes a plurality of support pieces 62 projecting at 90-degree intervals. The lower end of the support piece 62 is bent inward in the radial direction of the ring portion 61, and a support ball 63 is rotatably supported at the distal end so as not to fall.

On the lower end surface of the movable body 57, a spherical concave surface 64 is formed. The concave surface 64 has the movable body 5
Part of the annular groove 36A formed at the lower part of 7 is exposed. A large number of bearing balls 23 are rotatably accommodated in the annular groove 36A. A part of the lower surface of the movable body 57 is exposed to the concave surface 64 and is brought into contact with the bearing ball 23, and the lower part of the maximum diameter is supported by the support ball 63. The main ball 21 is rotatably supported.

The upper end surface of the movable body 57 and the holder 1
The spring 25 that elastically supports the movable body 57 is provided between the movable body 57 and the lid 55 provided at the upper end of 6B.
According to the caster device 15B having such a configuration, the main board
Since the ball 21 is supported by the support ball 63 of the support piece 62, most of the main ball 21 is exposed from a portion between the support pieces 62. Therefore, even if dust adheres to the surface of the main ball 21 due to rotation, the dust can be easily removed, and dust enters between the main ball 21 and the bearing ball 23, and The rotation of the ball 21 is prevented from becoming difficult.

FIG. 11 shows a sixth embodiment of the present invention, which is a modification of the fixture. Fixture 8 of this embodiment
D is a caster device 15 having substantially the same configuration as that shown in FIG.
C. This caster device 15C is different from the structure of FIG. 1 only in that the elastic sheet 24 is not provided on the upper inner surface of the holder 16, and
Since other configurations are the same, the same portions are denoted by the same reference symbols and description thereof is omitted.

The mounting fixture 8D has a mounting portion 14B having a truncated conical outer shape . The inside of the mounting portion 14B cylindrical portion 61 A is formed, the caster device 15C is accommodated in the cylindrical portion 61 A. The cylindrical portion 61 A is formed shorter than the mounting portion 14B.

A holding member 6 is provided on the lower end surface of the mounting portion 14B.
2A is bonded and fixed. This holding member 62 A have openings 62a of substantially the same diameter as the inner diameter of the caster devices 15 stopper portion 18 provided on the lower end surface of the holder 16 is formed, the caster device 15C is the tubular portion 61 A Is prevented from falling off. The main ball 21 is
Part of which protrudes from the lower surface of the holding member 62 A.

[0042] The upper end surface of the accommodating portion 14B and is fixed by protruding bolt 63 A screw portion from its inner surface side, the attachment portion 14B is furniture body, such as beds and sofas using the bolt 63 A 64 Nut 65 buried in A
It is screwed into and attached.

FIGS. 12 and 13 show a seventh embodiment of the present invention. This embodiment shows a sofa-71 as furniture. This sofa-71 has a seat portion 72 and a back portion 73. In the seat portion 72, a spring unit 75 is mounted on a base 74 made of a wooden frame, and a cushion material 76 is laminated on the spring unit 75. And
This laminate is covered with the exterior ground 77.

Casters 15D are provided at four corners of the lower surface of the seat 72. This caster device 15D
Are housed in a mounting portion 80a formed on a wooden mounting tool 80 also serving as a leg shown in FIG.

The caster device 15D accommodated in the mounting portion 80a has a holder 81. The stopper portion 18 is formed on the lower end surface of the holder 81, and the upper end surface is closed by a lid plate 82 made of resin. A movable body 84 is slidably accommodated in the holder 81, and a spherical accommodation portion 85 is formed at the lower end surface thereof. This storage part 85
Holds a main ball 21.

An annular groove 86 is formed at the lower end of the movable body 84 so as to expose a part thereof. The annular groove 86 accommodates the bearing ball 23. A part of the main ball 21 is in contact. Thereby, the main ball 21 is rotatably supported. The movable body 8
A spring 25 that elastically supports the movable body 84 is interposed between the upper surface of the cover 4 and the cover plate 82.

A screw 86 is screwed in from the upper end surface of the fixture 80. The screw 86 is screwed to the cover plate 82 of the holder 83. Thereby, the caster device 15 </ b> C is integrally connected to the attachment 80.
In addition, the mounting fixture 80 connects the screw 86 with the sofa-71.
It is attached by being screwed into the base 74 from the lower surface of the seat portion 72.

Therefore, the sofa-7 having such a configuration is used.
According to 1, when the user is not seated, the main ball 21 can be rolled and moved rotatably. When the user is seated, the spring 25 is compressed and the main ball 21 is moved. Relatively into the holder 83, the stopper 1
Since 8 is in contact with the floor, the movement is prevented.

FIG. 14 shows an eighth embodiment of the present invention.
In this embodiment, a member 91 constituting a furniture main body such as a bed or a sofa, for example, a side plate, a headboard, a footboard in the case of a bed, a base in the case of a sofa, and a lower end surface thereof. An open mounting hole 92 was formed, and the caster device 5 shown in the first embodiment was accommodated in the mounting hole 92, for example. The depth dimension of the mounting hole 92 is substantially the same as the height dimension of the holder 16 of the caster device 15. Therefore, only the main ball 21 is exposed from the lower end surface of the member 91.

Therefore, since the caster device 15 is hardly visible from the outside, the outer tube of the furniture can be improved. In particular, the main ball 21 cannot be viewed when used.
In particular, the appearance during use is improved.

[0051]

As described above, according to the present invention, the caster device mounted on the lower part of the furniture main body includes a holder having an open lower end surface, a movable member movably provided in the holder, and a movable member. A main ball rotatably provided at the lower end of the main body, and a spring for elastically holding the movable body and displacing the holder downward by being compressed by a load applied to the holder.

[0052] Therefore, the furniture is in, such as beds and sofas, to when the furniture is not in use, because the main ball is in a state capable of rotation, it is possible to easily move the furniture, at the time of use that At this time, the spring is compressed by the load of the user, and the main ball relatively enters into the holder, and the lower end surface of the holder comes into contact with the ground, so that the rotation of the main ball is prevented and the furniture does not move. Can be used with

In other words, if the furniture is configured to be movable, there is no need to perform operations such as locking when used or releasing the locked state when not in use as in the prior art, so that the furniture can be used simply and reliably. be able to. Further, since the caster device can be provided so as not to be exposed to the outside of the furniture main body, the appearance can be improved by providing such a caster device.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a caster device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a bed as furniture.

FIG. 3 is a perspective view of the caster device and an accommodating portion for mounting the caster device.

FIG. 4 is a perspective view of a housing showing a second embodiment of the present invention.

FIG. 5 is a sectional view of the same.

FIG. 6 is a perspective view of a housing section showing a third embodiment of the present invention.

FIG. 7 is a perspective view of a housing showing a fourth embodiment of the present invention.

FIG. 8 is a plan view of the same.

FIG. 9 is a longitudinal sectional view of a caster device according to a fifth embodiment of the present invention.

FIG. 10 is a perspective view of the same.

FIG. 11 is a longitudinal sectional view of a caster device according to a sixth embodiment of the present invention.

FIG. 12 is a partially sectional front view of a sofa according to a seventh embodiment of the present invention.

FIG. 13 is a longitudinal sectional view of the caster device.

FIG. 14 is a sectional view of a caster device mounting structure according to an eighth embodiment of the present invention.

[Explanation of symbols]

1 ... bed (furniture body), 15 ... caster device, 16 ...
Holder, 21: main ball, 25: spring, 27: movable body.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-193106 (JP, A) JP-A-2-15503 (JP, U) JP-A-60-22407 (JP, U) JP-A 53- 164469 (JP, U) Jiko No. 2-28767 (JP, Y2) Jiko 50-9700 (JP, Y1) Jiko 30-1876 (JP, Y1) (58) Fields surveyed (Int. Cl. ⁷ , DB name) A47B 91/00-91/06 B60B 33/00 501 B60B 33/08

Claims (1)

(57) [Claims] 1. Furniture movably supported by a caster device attached to a lower portion of a furniture main body, wherein the caster device has a holder having an open lower end surface, and a movable body movably provided in the holder. And a main ball rotatably provided at the lower end of the movable body, and the movable body being elastically held and compressed by a load applied to the holder, whereby the holder is moved downward according to the amount of compression. The furniture main body includes an attachment having an attachment portion having an outer shape formed in a truncated cone shape and a tubular portion formed inside the attachment portion. The caster device is mounted in the cylindrical portion, and an opening for preventing the caster device from falling off the cylindrical portion and projecting the main ball is formed at a lower end surface of the cylindrical portion. Furniture, characterized in that the holding member is provided with.