Apparatus and method for locking and unlocking the door of an elevator car
AssigneeKone Corporation
InventorFranz Josef Karner
Life of this patent
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Abstract
An apparatus for locking the door of an elevator car includes a lock (12) that locks the car door, a guide surface (9) in the elevator shaft at each landing and a linkage (6) operating the lock (12). The linkage includes an operating lever (17) which, when at a landing, presses against the guide surface (9) via a roller. The lever is pivotally attached to the linkage (6) by a movable pivot (20). When the door is reaching the closed position, a coupling element (2) transmits motion of the door to the linkage (6) to operate the lock (12) using the driving power of the door actuating mechanism.
Claims20
Apparatus for locking a door of an elevator car movable in an elevator shaft, said shaft including a guide surface at each landing, said elevator car including a door actuating mechanism on the elevator car for moving the door along a door travelling path, said apparatus comprising:
- a lock for locking the door of the elevator car;
- a linkage for operating the lock in cooperation with said guide surface, said linkage including an operating lever having a roller thereon which, when at a landing, presses against the guide surface, the operating lever being pivotally attached to the linkage by a movable pivot;
- and
- a coupling element moved by the door actuating mechanism and fitted to transmit motion of the door produced by the door actuating mechanism to the linkage only at an ending portion of the door travelling path when the door is reaching a closed position.
A method for locking and unlocking the car door of an elevator by means of a locking apparatus including a lock in the elevator car for locking the door, a guide surface in the elevator shaft at each landing, and a linkage acting on the lock, said linkage including an operating lever having a roller thereon which, when at a landing, presses against the guide surface, the operating lever being pivotally attached to the linkage by a movable pivot, said method comprising the steps of:
- transmitting a driving power from a car door actuating mechanism to the linkage and further via the linkage to close the lock only when the door is reaching a closed position;
- and
- removing the force effect produced by the car door actuating mechanism from the linkage and permitting a return action that releases the lock to take place in the linkage in order to unlock the car door.
Dependencies are inferred from the claim text.