JPH0534944U - Chair seat support device - Google Patents

Abstract

(57) [Abstract] [Purpose] As a unit, it can be easily placed on the left and right outer sides of the seat to support the seat so that it can be swung up and down very smoothly. It is an object of the present invention to provide a simple seat support device for a chair that does not allow the outside to be seen from the outside and that can obtain a thin and sleek design chair. A seat support arm 8, a pivot 10 and a stopper 11 projecting outward from the seat support arm 8, a bearing 12 that rotatably supports the pivot 10 and a seat support arm 8 are always rotated in the upright direction via the pivot 12. A pair of left and right pairs including a built-in spring 13 for urging the seat to lift up and a rectangular cylindrical arm receiving base 9 having a rotation restricting recess 9a for restricting the rotation of the stopper 11 within a predetermined range. The seat support unit 7 is configured, and the left and right seat support units 7 are attached to the left and right support bodies 6 of the chair to support the seat.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a seat support device for a chair that is mainly installed and used in a public facility such as a theater or a public hall, and more particularly to a seat support device for a seat-up type chair that automatically stands up when a seated person leaves the seat. ..

[0002]

[Prior Art]

 In this type of seat-bounce type chair, a shaft that supports the seat so that it can be tilted up and down, a stopper member that restricts the range of rotation of the seat, and a torsion coil spring that automatically raises the seat It is configured to include a seat support device including members and the like.

[0003]

[Problems to be solved by the device]

 By the way, in the above-mentioned conventional seat-up type chair, since the constituent members of the seat supporting device such as the stopper member and the flip-up member are laid out and housed inside the seat, the seat thickness is inevitably designed. It gets bigger. Also, if the seat is made thin and the seat support device described above is set under the seat, the respective constituent members are completely visible when the seat stands up and the appearance is not good. Moreover, since each component of the seat supporting device is assembled when the seat is attached, the work of assembling the seat is troublesome.

The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to easily arrange the seat flip-up supporting structure members as a unit on the left and right outer sides of the seat, and to raise the seat very smoothly. The seat can be tilted and supported, and the seat can be made thinner.Because the seat bounce support component is made into a unit, the seat bounce spring and bearing are not exposed to the outside from the outside. It is to provide a seat support device for a chair that not only makes it possible to obtain a chair with a slender design, but also makes it extremely easy to assemble the seat. Another object of the present invention is to provide a seat support device for a chair, which can be rotatably supported by tilting its pivot axis and can be suitably applied to a circularly arranged connecting chair.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the chair seat supporting device of the present invention comprises a seat supporting arm, a pivot and a stopper which are spaced apart from the seat supporting arm and protrude outwardly, respectively, and the pivot is rotatable. A built-in spring for springing up a seat that constantly rotates the seat support arm in the upright direction via a bearing and a pivot that is supported, and a rotation restriction that restricts the rotation of the stopper around the pivot within a predetermined range. A pair of left and right seat support units comprising a rectangular tubular arm support base with a recess is formed, and the arm support bases of the left and right seat support units are attached to the left and right supports of the chair, and left and right Both sides of the seat are supported by the seat support arm of the seat support unit. Further, in the chair seat supporting device of the present invention, a spherical bearing is used as a bearing.

[0006]

[Action]

 According to the above-described seat support device for a chair, a seat-bounce support component such as a seat support arm, a pivot, a stopper, a bearing, a spring for spring-up of the seat, and a rectangular cylindrical arm receiving base having a rotation restriction recess. Are combined into one to form a seat support unit, and this seat support unit is attached to the left and right supports of the chair, and the seat support arms of the left and right seat support units support both sides of the seat. It is not necessary to lay out and store the seat bounce support component inside, and it becomes possible to design the seat thinly.In addition, the unitization of the seat bounce support component makes it possible to design a seat and a stopper that does not look good. The bearing and the spring for springing up the seat are not exposed to the outside, and only the seat support arm and the arm receiving base that are in good shape can be seen. Child so that can be obtained. In addition, since the seats are supported by the left and right seat support units that are made up of the seat bounce support component, the work of assembling the seats is very simple, and the seat is raised because the pivot is supported by the bearings. It will be possible to turn over very smoothly. Further, by using a spherical bearing as the bearing, the pivot can be tilted to be rotatably supported, and therefore, the present invention can be suitably applied to a circularly arranged connecting chair.

[0007]

【Example】

 An embodiment of a seat support device for a chair according to the present invention will be described below with reference to the drawings. First, FIGS. 5 and 6 show a connecting chair, in which a plurality of supporting legs 1 as left and right supporting members of the chair are equally spaced from each other and are erected on a floor surface A via a leg base 2 at the lower end. .. Each of these supporting legs 1 is formed by bending two pipe frames 1a at the front and rear, and an armrest 3 is continuously provided on the upper part thereof. A seat 4 and a backrest 5 are attached between each of the fulcrums 1 to form a seat in which one person can sit.

The seat 4 and the backrest 5 are thin ones in which the cushion bodies 4b and 5b are superposed on the surfaces of the back plates 4a and 5a, respectively. The seat 4 is attached to and supported by a mounting plate 6 provided near the upper portions of the left and right supporting legs 1, 1 via a pair of left and right seat supporting units 7, 7 of the seat supporting device of the present invention so as to be able to turn up and down. There is. On the other hand, the backrest 5 is attached and fixed to the upper rear frame portions of the left and right supporting legs 1, 1 by directly connecting both sides of the back plate 5a with metal fittings or the like.

Here, the left and right seat support units 7 of the seat support device that supports the seat 4 are symmetrical to each other. The seat support unit 7 on the right side (viewed from the front of the chair) will be described with reference to FIGS. 1 to 4. The seat support unit 7 mainly includes a seat support arm 8 and an arm receiving base 9 thereof. This is a configuration in which a pivot 10, a stopper 11, a bearing 12, a spring for springing up the seat 13 and the like are mounted.

The seat support arm 8 has a front and rear elongated seat support plate portion 8a and a hanging plate portion 8b bent from an outer edge of the substantially rear half portion. Seat stopper holes 8c are formed at the front and rear ends of the seat support plate portion 8a of the seat support arm 8. A reinforcing plate 8d is joined to the outer side surface of the hanging plate portion 8b. At substantially the center of the hanging plate portion 8b, the pivot shaft 10 is provided so as to project from the inside toward the outside through the reinforcing plate 8d. The pivot 10 is a stepped bolt, and a spring receiving groove 10a is formed at the tip of the screw portion. Further, the stopper 11 is provided at a position obliquely rearward and downward from the pivot of the hanging plate 8b so as to project outward in parallel with the pivot 10 from the inside through the reinforcing plate 8d. The stopper 11 has a relatively thick and short pin shape, and a cushioning and soundproof member 11a made of rubber or the like is fitted on the outer peripheral surface thereof.

The arm receiving base 9 is an aluminum die-cast product in the shape of a rectangular cylinder having a slightly rounded side surface, and integrally has a mounting flange 9a with a bolt hole at the outer end. A stepped circular hole 9b is formed in the arm receiving base 9 so as to penetrate from the inner end to the outer end side at the center of the upper half portion, and the axis of the stepped circular hole 9b is centered below the stepped circular hole 9b. An arc-shaped lateral hole-like rotation restricting concave portion 9c is formed so as to open to the inner end side. A reinforcing plate 14 is fitted on the rear end surface of the rotation restricting recess 9c and fixed by a machine screw 15. On the contrary, a rotation range adjusting member using a stepped nut on the front end side. 16 is fixed by a pan head machine screw 17 with a cross hole.

The bearing 12 is fitted into the stepped circular hole 9 b of the arm receiving base 9 from the inner end side, and a cover 18 for pressing and holding the bearing 12 from the inner end side is provided. It is fitted and fixed by a plurality of countersunk machine screws 19. As the bearing 12, a spherical bearing is used. Further, the cover 18 has a shaft insertion hole 18a formed at the center thereof and a plurality of spring receiving small holes 18b formed at the periphery thereof. On the contrary, the counter-spring spring 13 which is a torsion coil spring is inserted into the stepped circular hole 9b from the outer end side. The inner end extending portion 13a of the spring for flipping up the seat 13 is selectively inserted and locked in any of the plurality of spring receiving small holes 18a of the cover 18.

The seat support arm 8 is attached to the inner end side of the arm receiving base 9. That is, the pivot 10 protruding from the seat support arm 8 is inserted through the shaft insertion hole 18a of the cover 18 so as to be rotatably supported by the bearing 12 in the arm receiving base 9. A U-nut 21 is screwed from the outer end side through the spacer 20. Further, a stopper 11 protruding from the seat support arm 8 is inserted into the rotation restricting recess 9c of the arm receiving base 9. As a result, the seat support arm 8 is supported by the arm receiving base 9 via the pivot 10 so as to be rotatable in the up and down direction, and the rotation in the up and down direction is performed by the stopper 11 and the rotation restricting recess 9c. It is regulated within the prescribed range.

Further, the outer end extending portion 13b of the spring-up spring 13 in the arm receiving base 9 is inserted and locked in the spring receiving groove 10a at the tip of the pivot 10. The seat supporting arm 8 is constantly urged by the spring 13 for raising the seat through the pivot 10 in the upright direction. A C-shaped retaining ring 22 is fitted on the tip of the pivot 10.

A pair of left and right seat supporting units 7 having such a configuration are provided, and the mounting flanges 9a of the arm receiving bases 9 of the left and right seat supporting units 7 and 7 are attached to the supporting legs 1 and 1 which are the left and right supporting bodies of the chair. It is joined to the inside of the mounting plate 6 near the upper part and bolted, and both sides of the back plate 4a of the seat 4 are mounted on the seat support plate portions 8a of the seat support arms 8 of the left and right seat support units 7 and 7 and screwed. Stop and support.

However, in the case of a chair using the seat supporting device having the above-described configuration, the seat supporting arm 8, the pivot 10, the stopper 11, the bearing 12, the spring for springing up the seat 13, and the rotation restricting concave portion 9c are provided. The seat-bounce-up supporting components such as the rectangular tubular arm receiving base 9 are integrated into a seat supporting unit 7, and the seat supporting unit 7 is attached to the supporting legs 1 which are the left and right supports of the chair, and Since the assembly can be performed by supporting both sides of the seat 4 by the seat support arms 8 of the left and right seat support units 7, it is not necessary to lay out the seat flip-up support components inside the seat 4 and to store the seat 4 in a thin shape. In addition to being able to design into a shape, the seat bounce support component is unitized so that the pivot 10, the stopper 11, the bearing 12, the spring bounce spring 13, etc., which are not well-formed, can be rolled from the outside. A chair with a thin and neat design can be obtained by only seeing the seat support arm 8 and the arm receiving base 9 which are in good shape without being visible.

Further, since the seat 4 is supported by the left and right seat support units 7 in which the seat flip-up support constituent members are assembled, the work of assembling the seat 4 is very simple, and the pivot 10 is supported by the bearing 12. By doing so, the seat 4 can be turned up and down very smoothly.

In other words, when the seated person pushes down the seat 4 with his / her hand or hips, the seat 4 rotates in the forward tilt direction around the pivot 10 together with the seat support arm 8 and the stopper 11 rotates. When it hits the rear end of the inside, the rotation of the seat 4 is restricted, and the seat 4 is held in a substantially horizontal falling state so that the seated person can sit down. Further, when the seated person leaves the seat, the seat 11 is automatically rotated by the urging force of the spring for springing up the seat 13 via the pivot 10 and the seat support arm 8 to cause the stopper 11 to rotate. It stops when it hits the front end in 9c, and the seat 4 is held in a flipped-up state with an appropriate forward rising angle to secure a passage space on the front side.

Since a spherical bearing is used as the bearing 12, the pivot 10 can be rotatably supported by inclining the pivot 10, so that there is no problem even if the connecting chair has a circular arrangement such as a planetarium.

[0020]

[Effect of the device]

 Since the seat supporting device for a chair of the present invention is configured as described above, the seat flip-up supporting components can be collectively arranged as a unit on the left and right outer portions of the seat, and the seat can be swung up and down very smoothly. It is possible to support it, and the seat can be made thinner, and the seat-bounce-up support component is made into a unit so that the spring and the spring for the seat-bounce-up are not exposed from the outside, and the design is thin and sleek. The chair can be obtained, and the effect of easily assembling the seat can be obtained.

The seat support device of the present invention can be rotatably supported by tilting the pivot by using the spherical bearing as the bearing as described above, and thus can be suitably applied to a circular connection chair. The effect is obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of a seat support device for a chair according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is an outer end view taken along the line BB of FIG.

FIG. 4 is an exploded perspective view of a main part of the above embodiment.

FIG. 5 is a partially omitted front view of a connecting chair using the seat supporting apparatus of the above embodiment.

FIG. 6 is a side view of the same connection chair.

[Explanation of symbols]

1, 6 ... Support (1 ... Support leg, 6 ... Mounting plate), 4 ... Seat, 7
... Seat support unit, 8 ... Seat support arm, 9b ... Rotation restriction recess, 9 ... Arm receiving base, 10 ... Axis, 11 ... Stopper, 12 ... Bearing (spherical bearing), 13 ... Seat spring spring.

Claims (2)

[Scope of utility model registration request] 1. A seat support arm, a pivot shaft and a stopper which are spaced apart from the seat support arm and project outwardly from the seat support arm, a bearing for rotatably supporting the pivot shaft, and an upright direction of the seat support arm via the pivot shaft. And a rectangular tubular arm receiving base having a rotation restricting concave portion for restricting the rotation of the stopper about the pivot within a predetermined range. A pair of left and right seat support units are configured, the arm receiving bases of the left and right seat support units are attached to the left and right support bodies of the chair, and the seat support arms of the left and right seat support units support both sides of the seat. A seat support device for a chair characterized by the above. 2. The seat supporting device for a chair according to claim 1, wherein a spherical bearing is used as a bearing.