Detection device for detecting driving chain fracture and loosing of escalator

Abstract

The invention discloses a detection device for detecting driving chain fracture and loosing of an escalator. The detection device includes a chain loosing detection mechanism and a chain fracture detection mechanism. Both of the chain loosing detection mechanism and chain fracture detection mechanism comprise safety switches, hitting rods arranged on the upper portion of the safety switches, cantilevers and connecting plates which are used for installing the safety switches and the cantilevers, one end of each cantilever is rotationally connected with the corresponding connecting plate througha rotary shaft, and with the rotary shaft as the center of a circle, the arc distance between the hitting rods and the contacts of the safety switches of the chain fracture detection mechanism is longer than that of the chain loosing detection mechanism. By means of the detection device, the problem that a brake cannot be triggered to work when the chain is fractured or loose could be avoided, and the action of triggering an additional brake by accident when the chain is loose but not fractured could also be avoided.

Description

technical field [0001] The invention relates to the technical field of escalators, in particular to a detection device suitable for detecting broken and slack driving chains of escalators. Background technique [0002] With the rapid development of social economy and the continuous improvement of people's living standards, escalators have become an important part of people's daily travel. While escalators bring convenience, accidents are also increasing. As an important component of the escalator, the drive chain will trigger an additional brake action once it breaks. If the additional brake fails, the escalator will reverse causing casualties. In recent years, there have been many escalator slippage accidents caused by the breakage of the main drive chain across the country, causing many passengers to be injured. [0003] The current escalators are equipped with drive chain break detection according to national standards. However, in actual conditions, when the driving ...

AI Technical Summary

Problems solved by technology

However, in actual situations, when the drive chain is loose to a certain extent, it will also cause the action of the broken chain detection device.

As a result, the action of the additional brake is triggered by mistake, causing the escalator to stop with a large deceleration, that is, an emergency stop, which may easily cause the possibility of falling or even death

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