Safety monitoring system of elevator

Abstract

The invention relates to a safety monitoring system of the lift. The circuits of three systems of a lift system safety circuit (SC1), a lift car system safety circuit (SC2) and a lifting system safety circuit (SC3) are connected at a safety circuit monitoring unit (3), thereby dividing into three systems; so, the cable length of each system shortens, the voltage decreases. And the safety switch of each system is able to utilize the switch in normal specification. The safety circuit monitoring unit (3) outputs the lift running inhibit command and ensures the abnormal safety switch under the condition that there is abnormal system. By the configuration, the cheap safety switch in normal specification is used in the safety circuit and the energy and time of the operators for restoring the operation are reduced.

Description

Elevator Safety Monitoring System technical field The invention relates to a safety monitoring system for elevators. Background technique Elevator systems are composed of a large number of elements such as various electrical equipment, mechanical mechanisms, and many parts and members used for them. While the operation of the elevator is continued, among these plurality of constituent elements, there is an abnormal element such as a failure. With regard to the important requirement that the occurrence of an abnormality hinders the safe operation of an elevator, a safety monitoring system capable of rapidly detecting the abnormal state has conventionally been constructed. As one of the methods adopted by such a safety monitoring system, for example, there is a proposal disclosed in Japanese Patent Laid-Open No. 2005-96881 (Patent Document 1), in which abnormality can be quickly detected by providing a circuit called a safety circuit. . In this Patent Document 1, a safet...

AI Technical Summary

Problems solved by technology

However, the method of Patent Document 2 cannot be said to be a preferable method considering the possibility of radio wave interference and equipment malfunction due to the use of a wireless communication unit.

In addition, adding a wireless communication unit to all units that monitor normality and abnormality will inevitably lead to a significant cost increase.

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