Patent ID: 6021871
Filing Date: 2000-02-08
Classification: B66B

Abstract:
An apparatus for opening and closing a car door and a shaft door of a elevator installation during a stop of an elevator car at a floor comprising:an entraining system for coupling a car door of an elevator car to a shaft door to effect coordinated opening and closing of the doors; anda locking mechanism including a transmission lever having one end attached to said entraining system and an opposite end, a locking rocker pivotally attached to said opposite end of said transmission lever, a support roller mounted on said locking rocker, a support rail adapted to be mounted on the shaft door for contact with said support roller, a catch adapted to be pivotally mounted on the car door and being pivotally attached to said locking rocker, and a lock plate adapted to be mounted to the elevator car a predetermined spacing from said catch for engagement with said catch;whereby when said entraining system and said locking mechanism are mounted on the elevator car and the shaft door, the car is outside an unlocking zone and the car door begins to open, said catch engages said lock plate to prevent opening of the car door in excess of the predetermined spacing between said catch and said lock plate; andwhereby when the car is in the unlocking zone and the car door begins to open, said support roller is moved into contact with said support rail through a combination of movement of the car door and actuation of said entraining system to rotate said catch out of engagement with said lock plate and unlock the car door thereby reducing a time required to open the car door and an adjacent shaft door.