Importance

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Abstract

An apparatus for turning up and down a spectator's seats includes a foot member which is turnably supported within a base frame fixedly mounted on the movable platform. A pair of Y-shaped lock links are supported turnable about a support shaft which extends throught the fore end thereof. The upper portions of the lock links rotatably support a locking and unlocking roller therebetween and this roller serves as a weight. On the other hand, the lower portions of the lock links are formed with a hook respectively. A locking angle is fixedly secured to both the side walls of the base frame at the position located behind foot member in such a manner that the hooks are engaged to the locking angle to firmly hold the foot member in the upright standing posture when the roller is lowered by turning movement. Engagement of the hooks to the locking angle can be released by abutment of the roller against the front nose on the upper movable platform during backward movement of the first-mentioned movable platform. The foot member has a shaft about which it is adapted to turn and the shaft has spring means mounted thereon on both the sides of the foot member to normally turn up the foot member toward the upright standing posture. The base frame is provided with stopper bolts adapted to inhibit the seat from turning backwardly as well as adjustment bolts adapted to inhibit it from turning forwardly.

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First Claim