Self-checking system of door sliding block

Abstract

The invention discloses a self-checking system of a door sliding block, wherein the door sliding block probes into a sill slot and slides in the sill slot along with the opening and closing of an elevator door, a wear-resistant surface of the door sliding block facing a friction surface of the sill slot is a double-layer structure, the inner layer of the double-layer structure can reflect specificlight waves, and the outer layer of the double-layer structure cannot reflect the specific light waves; the friction surface of the sill slot cannot reflect the specific light waves; the friction surface of the sill slot is perforated and embedded with a reflective photoelectric device; during the process of fully opening and closing the elevator door, the door sliding block passes through the reflective photoelectric device; a light emitting head of the reflective photoelectric device is used for emitting the specific light waves to the friction surface opposite to the sill slot, a light receiving head is used for receiving the specific light waves reflected by the wear-resistant surface of the door sliding block, and if the light receiving head receives the specific light waves, a firstsignal is sent to a controller; and if the controller receives the first signal, an excessive wear signal is output to the wear-resistant surface of the door sliding block, The self-checking system of the door sliding block can monitor the abrasion of the elevator door sliding block automatically, and has a simple structure and no noise nuisance.

Description

technical field [0001] The invention relates to elevator equipment, in particular to a door slider and a self-checking system for the door slider. Background technique [0002] The elevator doors are guided in the sill by the door sliders, which guide the doors in a straight line of movement. [0003] The commonly used door slider structure is the middle mounting plate, the mounting plate is covered with plastic rubber. The rubber has the effect of damping and silencing, and also has a certain degree of elasticity. It can squeeze through the narrow section of the sill. The friction coefficient of the rim fit is large, so the rubber surface is wrapped with wear-resistant materials (such as Teflon or nylon and other wear-resistant materials with a small friction coefficient) to reduce the friction generated when the bottom of the door moves. [0004] Due to the improper adjustment of the elevator door and other reasons, the door slider will not fall on the center of the sill ...

AI Technical Summary

Problems solved by technology

[0004] Due to the improper adjustment of the elevator door and other reasons, the door slider will not fall on the center of the sill groove, but will rely on and squeeze one side of the sill groove. Under the influence of the reaction force on the inner wall of the sill groove, the friction force will increase sharply. Can cause excessive wear of the wear-resistant material on the surface of the door slider

Once the wear-resistant material on the surface of the door slider is worn out, the rubber wears faster, and the friction coefficient between the rubber and the sill is greater than that between the wear-resistant material and the sill, which will cause the bottom friction force to suddenly change when the door moves. The increase will not only generate noise, but also cause the door to overturn. On the landing door, it will even cause the forced door closing device to fail to close the landing door in place, resulting in the danger of people falling down the shaft

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