Patent ID: 6220396
Filing Date: 2001-04-24
Classification: B66B

Abstract:
An elevator door restrictor apparatus for preventing a sliding door on an elevator car from opening unintentionally when the car is not at a landing area, the door restrictor apparatus comprising:a lug mounted on the car;an actuating mechanism disposed on a surface of the door, the actuating mechanism having an actuating surface that moves toward and away from the surface of the door;a pivotable hook mounted on the door, the hook having an axis of rotation that is perpendicular to the direction of the movement of the door, the hook having a beak end for alternatively passing by or locking against the lug as the car door opens;a crank and push rod assembly disposed on the surface of the door and connected to the pivotable hook and the actuating mechanism, the crank and push rod assembly coupling the rotation of the pivotable hook to the movement of the actuating surface; andmeans for biasing the restrictor apparatus to urge the actuating surface to move away from the surface of the door and to urge the pivotable hook to rotate in a first direction;the restrictor apparatus having (i) a closed position wherein the hook is at a first position and the actuating surface is at a corresponding first position when the sliding door is closed; (ii) an unlocked position wherein the hook is at a second position where the beak will pass by the lug as the door opens when the car is at a landing and wherein the actuating surface is at a corresponding second position; and (iii) a locked position wherein the hook is at a third position where the beak will engage and lock against the lug as the sliding door opens when the car is not at a landing area and wherein the actuating surface is at a corresponding third position.