Handrail strap speed measuring device of escalator or moving pavement

Abstract

The invention discloses a handrail strap speed measuring device of an escalator or a moving pavement, wherein a supporting plate is rotatablely arranged on a fixed bottom plate; a non-metal speed measuring wheel is arranged on an end part of the supporting plate; an elastic member is arranged between the other end part of the supporting plate and the fixed bottom plate; thus, when the speed measuring wheel operates on a tight side of the handrail strap, the speed measuring wheel is stressed by pressure of the handrail strap on the tight side to rotate downwards on the supporting plate and is prevented from being easily damaged due to overlarge stressing, and meanwhile, the handrail strap of the tight side is tightly pressed on a circumferential surface of the speed measuring wheel by means of elastic acting force of the elastic member; when the speed measuring wheel operates on a loose side of the handrail strap, the stressing of the speed measuring wheel is weakened, the speed measuring wheel rotates upwards on the supporting plate so that the handrail strap on the loose side can also be tightly pressed on the circumferential surface of the speed measuring wheel under the action of elastic restoring force of the elastic member, the height can be automatically adjusted by the speed measuring wheel according to an operation track of the handrail strap, and frictional operation of the handrail strap is guaranteed all the time to guarantee that a probe smoothly detects a signal and the escalator or the moving pavement can normally work; and the stress of the speed measuring wheel is not overlarge and the speed measuring wheel is not easily damaged.

Description

[0001] technical field [0002] The invention relates to a speed measuring device for a handrail of an escalator or a moving walk. [0003] Background technique [0004] When the escalator or moving walk is running, when the deviation of the running speed of the handrail from the actual speed of the steps or pedals exceeds the range specified by the standard, the handrail speed measuring device can stop the escalator or moving walk. The handrail speed measuring device usually adopts the metal measuring point on the non-metallic roller (or called the non-metallic speed measuring wheel), the electrical probe is set at a position very close to the metal measuring point, and the non-metallic roller is rolled synchronously by the friction force of the handrail , the electrical probe can detect the speed of the handrail. This device is simple and practical, but because the handrail is a flexible and flexible part, it has loose and tight sides in different running directions. Whe...

AI Technical Summary

Problems solved by technology

This device is simple and practical, but because the handrail is a flexible and flexible part, it has loose and tight sides in different running directions. When the non-metallic rollers run on the loose side of the handrail, the handrail may go upward The bulge can not rub the non-metallic rollers, and the non-metallic rollers do not run. The electrical probe will judge that the speed of the handrail is abnormal, so that the escalator or moving walk will stop running by mistake. Once such a situation occurs, it will affect the normal operation of the escalator or moving walk. use

In order to solve this problem, if the non-metallic rollers are only raised singlely, when the tight side of the handrail is running, the non-metallic rollers are raised and subjected to a single force, which is easily damaged due to the high pressure.

Non-metallic rollers (or non-metallic speed measuring wheels) cannot be adjusted in height, which does not completely solve the above problems

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