Door knife linkage device and working method of door knife formed by door knife linkage device

Abstract

The invention discloses a door knife linkage device and a working method of a door knife formed by the door knife linkage device. The door knife linkage device comprises a power plate, a shifting piece, a first transmission shaft and a second transmission shaft, the power plate is provided with a first waist hole and a second waist hole, the shifting piece is provided with a third waist hole, oneends of the first transmission shaft and the second transmission shaft are fixed on a door knife swing arm, the first transmission shaft penetrates through the first waist hole, the second transmission shaft sequentially penetrates through the second waist hole and the third waist hole, and the first waist hole, the second waist hole and the third waist hole are strip-shaped. According to the doorknife linkage device and the working method, a car door lock function is combined with the door knife through the door knife linkage device, the functions of the synchronous door knife and the car door lock are realized, various defects caused by contraction of the door knife when power is cut off due to various reasons are solved, various requirements of national standards for opening a car doorare met, and the synchronous door knife of the car door lock is reasonable in structure, low in failure rate, safe, reliable, low in manufacturing cost and convenient to popularize.

Description

technical field [0001] The invention relates to the field of elevators, in particular to a door knife linkage device used for the linkage between an elevator door knife and a teaching lock and a working method for forming the door knife. Background technique [0002] 11.2.1c) in GB7588-2003 stipulates: "The horizontal distance between the inner surface of the elevator shaft and the edge of the nearest door of the car sill, car door frame or sliding door should not be greater than 0.15m. It also stipulates: If the car is equipped with The mechanically locked door can only be opened in the unlocking area of ​​the landing door. Except for special circumstances, the operation of the elevator automatically depends on the locking of the car door, and the locking of the car door must be confirmed by an electrical safety device. Spacing is unlimited". The general approach to the above regulations is: add a protective wall to the inner surface of the hoistway or install an independe...

AI Technical Summary

Problems solved by technology

[0016] 1. After the door machine is powered off, the door knife shrinks. If the car moves up and down at this time, the door knife blade will hit the gate ball;

[0017] 2. After the door machine is powered off, the door knife shrinks. If the car is running up and down at this time, the door knife blade will hit the gate ball, and the landing door lock and car door lock will be disconnected. The landing door lock and car door lock will be disconnected, causing the safety circuit to be disconnected and unable to operate normally;

[0018] 3. If there is an abnormal power failure on the leveling floor, all personnel can enter and exit the car freely because the floor door lock and car door lock have been disconnected, which poses a safety risk

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