RETRACTABLE STOP FOR MAINTAINING OVERHEAD CLEARANCE ABOVE AN ELEVATOR CAR

摘要

An assembly (30) controls the amount of downward movement of a counterweight (24) within an elevator system (20). By limiting the downward movement of the counterweight (24), a desired overhead clearance above an elevator car (22) can be maintained. A disclosed example includes at least one safety device (80, 84, 86, 88) on top of the elevator car (22) to provide an indication for when a holding member (34) should allow a stop member of the assembly (30) to move into a position to limit the downward movement of the counterweight (24). In a disclosed example, the stop member (32) moves into an employed position by the force of gravity and is manually moveable back into a retracted position when it is not needed. A disclosed example includes a guide member (60) that facilitates controlling the position of the stop member (32) when it is in the employed position.