PURPOSE: To simplify structure and reduce cost by providing pulleys at both ends of a frame body, winding a rope round the pulleys and also connecting one end of a link mounted to a door with the rope, and driving the pulleys with a motor.
CONSTITUTION: Pulleys 11 and 12 are provided at the both ends of the frame body 1 of a switching device mounted to a fixed part 25 on the side of a building, and a wire rope 23 is wound round the space between them. And a movable body 20 at one end of a link 22 mounted to a door 26 is provided to move freely in the frame body 1, and, at the same time, connected to the wire rare 23. Further, a motor 13 is mounted to the pulley 11, and drives the wire rope 23 to move the movable body 20 and open/close the door 26, thereby the structure of a device 24 is simplified and cost can be reduced.
SECONIC KK
NITSUSOU SHIYOUJI KK