JP2001161481A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To promote simplification of the structure, assembling facility or cost reduction in a chair for moving a seat according to rocking operation of the back. SOLUTION: A recessed part 10 loosely movably fitted with a connecting shaft S3 for connecting the back 2 and a seat 3 is arranged in a leg body 1, and the connecting shaft S3 is applied to inner peripheral surfaces 10a, 10b of this recessed part 10 to regulate rocking operation of the back 2 between a prescribed normally using attitude P and a backward tilting using attitude Q.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair configured to move a seat according to a rocking operation of a back.

[0002]

2. Description of the Related Art As a conventional chair of this type, a back and a seat or a support for supporting the back and the seat are connected so that they can rotate and slide with each other, or are connected via a link mechanism or the like. 2. Description of the Related Art There is known a seat in which a seat moves in response to a rocking motion of a back.

Various types of chairs of this type have been proposed. The purpose of the chair is to lock the seat and the back so that their relative positional relationship is not significantly changed. Even if it is performed, the seated person's shirt or the like can be prevented from being turned up or provided with a weight sensing function such that the force required for the rocking operation is changed according to the seated person's weight.

[0004]

In the meantime, a regulation mechanism for regulating the operation range is essential for the back rocking operation. However, in a chair in which the back seat is interlocked as described above, the interlock mechanism is used. Since the structure as a whole tends to be complicated due to the necessity of the above, it is extremely important to improve the simplification of the structure and the ease of assembly in this regulating mechanism.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention is to simplify the structure of this kind of chair by constructing the regulating mechanism by using the components of the interlocking mechanism for interlocking the back seat as it is. It is intended to promote ease of assembly, cost reduction, and the like.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A chair according to the present invention comprises a support, a back rotatably supported by the support and capable of performing a rocking operation, and a chair supported by the support. A seat that is connected to a portion deviated from the rotation center of the back via a connection shaft, and is configured to be able to move along with the rocking operation of the back, wherein the connection shaft is freely movable. A recess is formed in the support, and the connecting shaft is applied to the inner surface of the recess to restrict the back rocking operation between a predetermined normal use posture and a rearwardly inclined use posture. It is characterized by having done.

With such a structure, it is possible to use a connecting shaft for linking the movement of the seat with the back rocking operation as it is, and to constitute a regulating mechanism for restricting the back rocking operation to a predetermined range. . Therefore, in this kind of chair where the structure tends to be complicated, a very remarkable effect that the structure can be simplified can be achieved. This also facilitates ease of assembly and cost reduction.

As a specific embodiment that can be easily realized, in a case where the support body has a side wall, a back hole and a seat are supported on the side wall, and a through hole is provided in the thickness direction thereof. One having a role as a concave portion can be given. In order to realize a stable locking operation of the back and to more effectively reduce the number of parts, the back is provided with a pair of back support rods on the left and right, and these back support rods are shared. It is preferable that the support member is rotatably connected to the seat by a single connection shaft.In addition, in order to further improve the ease of assembly and the simplification of the structure, the support member is provided with a pair of left and right side walls, It is preferable that each of the back support rods is arranged outside each side wall.

As an embodiment for interlocking the back seat, the seat is rotatably supported by the support, and the center of rotation is set at a position substantially forward and substantially horizontal with respect to the center of rotation with respect to the back support. And a portion extending forward from the rotation center of the back and a portion extending rearward from the rotation center of the seat are rotatably coupled to each other by the connection shaft,
By moving the connecting point up and down along with the rocking operation of the spine, the rear portion of the seat can be moved up and down.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In the chair according to the present embodiment, the back 2 is rotatably supported by the leg 1 as a support so that the rocking operation can be performed, and the seat 3 is supported by the leg 1 so as to be rotatable and slidable back and forth. The portion of the back 2 deviated from the rotation center X1 with respect to the leg 1 and the portion of the seat 3 deviated from the rotation center X2 with respect to the leg 1 are connected so as to be rotatable with each other. The seat 3 is configured to move up and down in accordance with the locking operation 2.

More specifically, as shown in FIGS. 1 and 2, the leg 1 includes, for example, four legs 11, 11, 12, 12, a horizontal member 13 and a back support member 5. It becomes. More specifically, the left front leg 11 and the left rear leg 12, and the right front leg 11 and the right rear leg 12 are integrally connected at their upper ends, respectively, and the connected left and right front and rear legs 11, 11, 12, and 1 are connected.
2 are connected at the upper end via a horizontal member 13 to form a self-supporting structure.
A back seat support member 5 having a bottom plate 51 having a substantially rectangular shape in a plan view and a side plate 52 serving as a side wall integrally raised from each side edge of the bottom plate 51 is fixed by welding or the like.

As shown in FIGS. 1 to 5, the back 2 has a pair of right and left back support rods 6 supported by a back support member 5, and a back fixed to the back support rods 6 to form a backrest surface. And a main body 21. The back support rod 6 integrally includes a link portion 62 and a main body portion 61 extending upward while curving upward from the rear end of the link portion 62. The base end portion of the link portion 62 is The back support member 5 is connected to a rotation center X1 set at the rear of the side plate 52 of the seat support member 5 via a horizontal support shaft S1 so as to be rotatable only.
The back 2 is supported so as to be able to perform a rocking operation between a predetermined normal use posture P and a rearward use posture Q. The left and right link portions 62 are disposed outside the left and right side plates 52, respectively. At each end of one horizontal support shaft S1, the left and right link portions 62 and the side plates 52 are connected to each other. They are connected. Of course, it is needless to say that the side plate 52 and the link portion 62 may be connected by separate support shafts for the left and right sides. Further, a portion of the horizontal support shaft S1 sandwiched between the side plates 52 is provided with a spacer SP interposed therebetween.
A torsion coil spring 9 is wound around the torsion coil spring 9.
The structure is such that the spine 2 is maintained in the normal use posture P when no external force is applied by the elastic return force of the torsion coil spring 9 by contacting the reinforcing member 63 interposed therebetween.

As shown in FIGS. 1 to 5, the seat 3 includes a seat receiving member 8 supported by the back seat support member 5, and a seat body 31 fixed to the seat receiving member 8 to form a seating surface. Have. The seat receiving member 8 includes a rectangular plate-shaped seat main body 83, a bracket 81 that is suspended from each side edge of the seat main body 83,
82, and these bracket portions 8
1, 82, a bracket portion 81 hanging down from the front side of the side edge portion of the seat receiving body 83 is connected to the front portion of the side plate 52 of the back seat support member 5 so as to be rotatable and slidable back and forth. I have. More specifically, the left and right bracket portions 81 are arranged inside the left and right side plates 52, respectively, and the left and right bracket portions 81 and the side plates 52 are arranged.
The bracket 81 and the side plate 52 are connected by penetrating one horizontal support shaft S2 to the left and right, and the bearing holes provided in the bracket portion 81 and the side plate 52 for penetrating the horizontal support shaft S2. 81a or 52a (in this embodiment, a bearing hole 52 provided in the side plate 52).
a) is a long hole extending substantially forward and backward, and the seat receiving body 83 is connected to the back seat support member 5 so as to be rotatable around a horizontal axis and slidably forward and backward. . The rotation center X2 of the seat 3 with respect to the leg 1 is
(In this embodiment, the rotation center X1 of the seat is slightly higher) than the rotation center X1 with respect to the leg 1. Needless to say, the connection between the side plate 52 and the bracket portion 81 may be performed by separate connecting shafts for the left and right sides.

On the other hand, the connection between the back 2 and the seat 3 is performed by one connecting shaft S3. Specifically, the front end portion of each of the left and right link portions 62 and the corresponding left and right bracket portions 82 suspended from the rear side of the side edge portion of the seat receiving body 83 are connected via each end of the connection shaft S3. Each is rotatably connected to each other. The left and right link portions 62 and the left and right bracket portions 82 are disposed outside the left and right side plates 52, respectively, and the connecting shaft S3 is made to penetrate the left and right through the through hole 10 which is a recess provided in each side plate 52. It is.

In this embodiment, however, this through hole 10
And the connecting shaft S3, a regulating mechanism for regulating the rocking operation of the back 2 to be performed between the predetermined normal use posture P and the backward tilt use posture Q is formed. That is, the through hole 10 has a size that allows the connection shaft S3 to be movably fitted therein. In the present embodiment, the through hole 10 follows the locus of the connection shaft S3 accompanying the locking operation of the back 2. , Are formed in a vertically elongated shape extending substantially vertically.

At the position where the connecting shaft S3 hits the upper inner surface 10a of the through hole 10, the back 2 is tilted backward to the use posture Q.
The further backward tilting operation of the back 2 is prohibited. On the other hand, at the position where the connecting shaft S3 hits the lower inner surface 10b of the through hole 10, the spine 2 is set to the normal use posture P, and any further forward tilting operation of the spine 2 is prohibited. In this embodiment, when the back 2 is in the normal use posture P (see FIG. 4), the back 2 and the seat 3
Is set so as to be located below the imaginary line M connecting the rotation center X1 and the rotation center X2, and the seat 3 is in a posture in which the rear part is most sunk. . Further, in a state where the back 2 is in the rearwardly tilted use posture Q (see FIG. 6), the connecting point X3 is set so as to be substantially located on the imaginary line M when viewed from the side, and the seat 3 has its rear portion. It is raised almost up so that it is almost horizontal. Thus, such a setting is provided to provide a weight sensing function in which the force required to tilt the back 2 backward increases as the weight of the occupant increases. X2, X
The positional relationship of 3 is not limited to the above-described one. For example, the movement of the connection point X3 may be performed only in an area above the virtual design line M, or may be performed across the virtual design line M. You may do so.

Therefore, according to the present embodiment configured as described above, the connecting shaft S3 for linking the movement of the seat 3 with the locking operation of the back 2 is used as it is, and the side plate 52 of the back seat support member 5 is simply used. Only by providing the through-hole 10, a regulating mechanism that regulates the locking operation of the spine 2 within a predetermined range can be configured. Therefore, in this kind of chair whose structure tends to be complicated, there is an extremely remarkable effect that the structure can be simplified.

In particular, in this embodiment, since the connection between the back 2 and the seat 3 is made at two places on the left and right, not only the stable connection between the back 2 and the seat 3 can be realized, but also the connection at these two places is shared. Since the connection is performed by one connecting shaft S3, the number of parts can be reduced and the assembling can be simplified. In addition, since the connecting portion between the back 2 and the seat 3 is located outside the side plate 52, this also contributes to simplification of the structure and assembly.

The present invention is not limited to the above embodiment. For example, the through-hole only needs to be able to regulate at least each moving end of the connection shaft, and need not be a long hole along the locus of the connection shaft as in this embodiment. The recess may be not only a through hole but also a groove having a bottom. The connection shaft may not be shared, but may be provided at each of the portions connecting the back seats, for example. In addition, the legs only need to have at least one side wall,
The embodiment is not necessarily limited to the pair as in the above-described embodiment, and a mode in which the side wall is positioned outside the connecting portion between the back and the seat can be considered. Further, the present invention can provide the same function and effect even when the present invention is applied to a type in which the seat can be turned horizontally or a type in which a plurality of back seats are arranged on a beam.

The specific configuration of each part is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0021]

As described in detail above, according to the present invention, the locking operation of the back is restricted to a predetermined range by directly using the connecting shaft for linking the movement of the seat with the locking operation of the back. A regulating mechanism can be configured. Therefore, in this kind of chair where the structure tends to be complicated, a very remarkable effect that the structure can be simplified can be achieved. This also facilitates ease of assembly and cost reduction.

In the case where the supporting body has a side wall, the side wall supports the back and the seat, and a through hole is provided in the thickness direction thereof, and the through hole functions as a concave portion. Then, it is possible to realize a product that is suitable for the actual manufacturing process and assembly process. If the back is provided with a pair of back support rods on the left and right, and these back support rods are rotatably connected to the seat by a common connection shaft, the locking operation of the back is performed. It is possible to more effectively reduce the number of parts while making sure
In addition, if the supporting body is provided with a pair of side walls on the left and right, and the back support rods are respectively arranged on the outer side of each side wall, mainly ease of assembly and simplification of the structure are achieved. It can be further improved.

The seat is rotatably supported by the support, and its center of rotation is set at a position substantially forward and substantially horizontal with respect to the center of rotation of the back support, and extends forward from the center of rotation of the back. The part and the part extending rearward from the center of rotation of the seat are rotatably connected to each other by the connection shaft, and the connection point is moved up and down along with the locking operation of the back, so that the rear part of the seat is If it is configured to move up and down, the effects of the present invention can be remarkably exhibited.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing a chair according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the internal structure of the chair in the embodiment.

FIG. 3 is an exploded perspective view showing the internal structure of the chair in the embodiment.

FIG. 4 is a side view showing the internal structure of the chair in the embodiment.

FIG. 5 is a plan sectional view showing the internal structure of the chair in the embodiment.

FIG. 6 is a side view showing the internal structure of the chair in the embodiment. DESCRIPTION OF SYMBOLS 1 ... Support body (leg) 2 ... Back 3 ... Seat 52 ... Side wall (side plate) 6 ... Back support rod 10 ... Recessed part (through-hole) 10a, 10b ... Inner surface X1 ... Center of rotation of back X2 ... Center of rotation of seat X3 ... Connection point P ... Normal use posture Q ... Backward tilt use posture S3 ... Connection shaft

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toshizo Murakami 5331 Nishiharu Kinoshimogawara, Ina-shi, Nagano Takano Co., Ltd. Furniture Development Dept. KOKUYO Co., Ltd. (72) Inventor Daiki Fukuda 6-1-1, Oimazato-minami, Higashi-Nari-ku, Osaka-shi F-term in KOKUYO Co., Ltd. 3B091 AA03 AB04 AC04 AD02

Claims (5)

[Claims] 1. A support, a back rotatably supported by the support and capable of performing a locking operation, and a back supported by the support and connected to a portion deviated from the center of rotation of the back. A seat configured to be connected via a shaft and configured to be able to move along with the locking operation of the back, wherein a concave portion in which the connecting shaft is movably fitted is provided in the support. The chair is characterized in that the connecting shaft is applied to the inner surface of the concave portion to restrict the rocking operation of the back between a predetermined normal use posture and a rearward use posture. 2. In a support having a side wall, a back hole and a seat are supported on the side wall, and a through hole is provided in the side wall in a thickness direction thereof, and the through hole serves as a concave portion. The chair of claim 1 wherein 3. The back is provided with a pair of back support rods on the left and right, and these back support rods are rotatably connected to the seat by one common connection shaft. The described chair. 4. The chair according to claim 3, wherein the support has a pair of left and right side walls, and each of the back support rods is arranged outside each side wall. 5. The seat is rotatably supported by a support, and the center of rotation is set at a position substantially forward of the center of rotation with respect to the back support and at a substantially horizontal position. And the portion extending rearward from the center of rotation of the seat are rotatably connected to each other by the connection shaft, and the connection point is moved up and down in conjunction with the locking operation of the back, whereby the seat The rear part is configured to move up and down.
The described chair.