JP2779123B2 - Elevating seat device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating type seat apparatus in which a seat is raised and lowered to be used in a theater or the like according to an event.

[0002]

2. Description of the Related Art As shown in FIG. 4, a seat device 13 having a plurality of seats 12 is supported via a link mechanism (pantograph mechanism) 11, for example, as shown in FIG. A hydraulic cylinder device 14 for driving the seat receiving member 13 up and down through the link mechanism 11 is provided,
In some cases, the seat 12 is used by moving up and down the upper and lower tiers according to the stage and entertainment.

[0003]

In the above configuration, when the seat 12 is arranged on the upper stage, the hydraulic cylinder device 14
Is advanced from the contracted state to drive the link mechanism 14 and stop just before the link mechanism 14 ascends. Therefore, the entire load including the seat receiving member 13 is applied to the hydraulic cylinder device 14 in a contracting direction, and a failure or damage occurs to the hydraulic device or the hydraulic circuit due to an accident or the like, and the predetermined hydraulic pressure is reduced. If not, there was a danger of the seat dropping.

[0004] It is an object of the present invention to solve the above problems and to provide an elevating type seat apparatus capable of stably and safely supporting a seat at an ascending position.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a lifting type seat apparatus according to the present invention comprises a parallel link mechanism between a seat receiving member having a seat and a floor, and a parallel link mechanism. A hydraulic double-acting lifting cylinder device that drives the seat to raise and lower the seat is interposed, and the parallel link mechanism is provided with a stopper that restricts the rotation limit of the link at the position where it is lowered beyond the lifting limit of the seat receiving member. The lifting cylinder device is configured so as to be extended or contracted by the rotation limit of the link.

[0006]

According to the above construction, the elevating cylinder device is advanced to drive the parallel link mechanism, the seat receiving member is raised from the lower limit position to the upper limit position, and the elevating cylinder device is further advanced from the contracted state to the extension limit. At a position where the seat receiving member is slightly lowered from the upper limit position, the link is stopped by locking the link to the stopper. Thus, the load of the spectator, the seat, and the seat receiving member is supported by the parallel link mechanism via the stopper that regulates the link, and is also supported by the lifting cylinder device. At this time, since the load is applied to the lifting cylinder device in the direction of pulling the piston rod, even if a trouble occurs in the hydraulic device or hydraulic circuit that supplies hydraulic pressure to the lifting cylinder device, the raised seat and seat support The member does not descend, and the seat receiving member can be stably and safely supported.

The lift cylinder device is arranged at different positions, and is driven from the extended state to the contraction limit to lock the seat and the seat receiving member by the stopper at a position slightly lowered from the upper limit position, and the load is lifted by the lift cylinder device. You may comprise so that it may load in the direction which shrinks.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a lift type seat apparatus according to an embodiment of the present invention. On the floor 1 such as a theater,
A seat receiving member 3 is arranged to be able to move up and down via a pair of left and right parallel link mechanisms 2, and a plurality of seats 4 are mounted on the seat receiving member 3. Each parallel link mechanism 2 is provided with a hydraulic double-acting lifting cylinder device 5 that drives the parallel link mechanism 2.

Each of the parallel link mechanisms 2 includes a pair of left and right mounting brackets 2a fixed to the floor 1 at predetermined intervals, and two lower and upper pair of mounting brackets 2a having lower link arms 2b of the same length via lower pins 2c. An intermediate arm 2d, which is supported to be tiltable and has a length corresponding to the horizontal distance between the lower brackets 2a, is rotatably connected between upper end portions of the lower link arms 2b via intermediate pins 2e. Further, the lower ends of the upper link arms 2f are rotatably supported by the intermediate pins 2e, and the upper ends of the upper link arms 2f are connected to the seat receiving member 3 via the upper pins 2g.

A projecting portion 2h is formed at the upper end of the outer lower link arm 2b via a connecting shaft i. The supporting bracket 6 is fixed to the center of the floor 1 and the connecting shaft 2i. , A lifting cylinder device 4 is disposed.

At the upper end of the lower inner link arm 2b, a stopper member 7A for restricting the rotation of the upper upper link arm 2f is attached, and on the upper surface of the outer end of the intermediate arm 2d, the upper upper link is provided. A stopper member 7B for restricting the rotation of the arm 2f is attached, and the stopper members 7A and 7B are turned outward by a predetermined angle θ further from the upright position where the lower link arm 2b is at the upper limit. Upper link arm 2
The rotation of f is set to be restricted.

The lifting cylinder device 5 is a double-acting cylinder in which a piston having a piston rod 5a connected thereto is slidably disposed in a cylinder tube, and a development-side oil chamber and a contraction-side oil chamber are formed on both sides of the piston. Thus, the upper link arm 2f is set so as to extend to a limit at a position where the upper link arm 2f is locked by the stopper members 7A and 7B. Hydraulic pressure is supplied to the lift cylinder device 5 from a hydraulic unit provided in a machine room or the like of the theater via a hydraulic pipe or directly from a hydraulic unit provided for each lift cylinder device.

In the above configuration, the seat 4 in the lowered position
Is raised to the ascending position, hydraulic pressure is supplied to the developing-side oil chamber of the ascending cylinder device 5 so as to extend the same, and the lower link arm 2b of the parallel link mechanism 2 is turned upright to move the seat receiving member 3 up. Raise to the ascent position. Further, a hydraulic pressure is supplied to the developing-side oil chamber of the ascending cylinder device 5 so as to extend the same, and the lower link arm 2b is further turned outward by a predetermined angle θ from the upright position. The rotation of 2f is the stopper member 7.
It stops at the ascending position regulated by A and 7B.

Thus, the seat 4 can be used in a raised state. In this raised position, the load of the audience and the seat 4 and the seat receiving member 3 is reduced by the stobber members 6A and 6B.
And supported by the lifting cylinder device 5 while supporting the parallel link mechanism 2. At this time, since the load is applied to the lifting cylinder device 5 in the direction of pulling the piston rod, even if a trouble occurs in the hydraulic device or the hydraulic circuit that supplies the hydraulic pressure to the lifting cylinder device, the seat 4 in the raised position and The seat receiving member 3 can be stably and safely supported without lowering.

As shown by an imaginary line in FIG. 1, an elevating cylinder device 5 'is arranged and driven from the extended state to the contraction limit to lower the seat 4 and the seat receiving member 3 slightly from the upper limit position. The stopper can be locked by a stopper, and the load can be applied in a direction in which the lifting cylinder device contracts.

[0016]

As described above, according to the present invention, the load of the spectator, the seat, and the seat receiving member is transferred to the parallel link mechanism and the lift cylinder device via the stopper for restricting the link at the seat raised position. Can be supported. At this time, the load applied to the lifting cylinder device will be in the direction of pulling the piston rod of the lifting cylinder device at the limit of extension, so trouble occurs in the hydraulic device that supplies hydraulic pressure to the lifting cylinder device and the hydraulic circuit, and the hydraulic pressure is reduced. Even if it becomes impossible to maintain the seat, the raised seat and the seat receiving member do not descend, and the seat receiving member can be stably and safely supported.

[Brief description of the drawings]

FIG. 1 is a front view of a raised position showing an embodiment of a lifting type seat apparatus according to the present invention.

FIG. 2 is a front view of a lowered position of the liftable seat apparatus.

FIG. 3 is a side view of the elevating type seat device in a raised position.

FIG. 4 is a side view of a raised position of the conventional elevating type seat apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor surface 2 Parallel link mechanism 2b Lower link arm 2d Intermediate arm 2f Upper link arm 3 Seat receiving member 4 Seat 5 Lifting cylinder device 6 Support bracket 7A Stopper member 7B Stopper member

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Ikumi Matsuzaki 5-28, Nishikujo, Konohana-ku, Osaka-shi, Osaka Hitachi Zosen Corporation (58) Field surveyed (Int.Cl. ⁶ , DB name) E04H 3/12

Claims (1)

(57) [Claims] 1. A parallel link mechanism and a hydraulic double-acting lifting cylinder device for driving the parallel link mechanism to raise and lower a seat are interposed between a seat receiving member having a seat and a floor surface, The parallel link mechanism is provided with a stopper for restricting the rotation limit of the link at a position where it is lowered beyond the rising limit of the seat receiving member, and the lifting limit of the lifting cylinder device is limited by the rotation limit of the link. A lifting type seat device characterized by having such a configuration.