Patent ID: 9637348
Date: 2017-05-02
CPC Classifications: B66B

Claim:
1. An elevator apparatus comprising: a car; a suspending means that suspends the car; a driving apparatus that raises and lowers the car by means of the suspending means; a car guide rail that guides raising and lowering of the car; a safety device that is mounted onto the car, and that engages with the car guide rail to make the car perform an emergency stop; an abnormal acceleration detecting mechanism that includes a mass body that operates in connection with movement of the car, the abnormal acceleration detecting mechanism operating the safety device using a force of inertia that is generated by the mass body if an acceleration that exceeds a predetermined set value arises in the car; a breakage detecting means that detects breakage of the suspending means; and a resistance force applying apparatus that applies a resistance force to a mechanism for activating the safety device such that the resistance force is applied so that the mechanism for activating the safety device activates the safety device upon a first abnormal acceleration that exceeds the predetermined set value being detected by the abnormal acceleration detecting mechanism when breakage of the suspending means is not detected by the breakage detecting means, and the resistance force is reduced so that the mechanism for activating the safety device activates the safety device upon a second abnormal acceleration that exceeds the predetermined set value being detected by the abnormal acceleration detecting mechanism if breakage of the suspending means is detected by the breakage detecting means, wherein the first abnormal acceleration is higher than the second abnormal acceleration.