ELEVATOR SAFETY CIRCUIT DEVICE

摘要

Provided is a safety circuit device of an elevator, wherein a fault detector detects an open fault whereby a first safety switch is opened by the fault, based on the states of first and second safety switches. A switching device normally connects a first safety circuit to a brake device and disconnects a second safety circuit from the brake device, and switches the circuit connected to the brake device from the first safety circuit to the second safety circuit when an open fault is detected by the fault detector. In addition, the time taken by the switching device to switch circuit is set to a shorter time than the time until the control operation of the brake device starts after the first safety switch opens.