Elevator and its anti-opening door shearing device

Abstract

The invention relates to an elevator and a door-opening shearing preventing device thereof. The door-opening shearing preventing device comprises an electromagnetic coil loop, stopping devices fixed to an elevator car, and electromagnetic devices each provided with two electromagnetic coils. The two electromagnetic coils of each electromagnetic device are arranged oppositely, and the two electromagnetic coils of each electromagnetic device and a car door lock switch are connected into the electromagnetic coil loop in series. Each stopping device comprises two wedge blocks which are arranged oppositely and matched with an elevator guide rail, and reset springs which correspond to the wedge blocks, wherein the two ends of each reset spring are connected with the corresponding electromagnetic device and the corresponding wedge block separately, and the wedge blocks are connected with the corresponding electromagnetic coils. When the elevator is opened on a flat floor area, the car door lock switch is tuned off, the electromagnetic coils are powered off, the reset springs restore, and the two wedge blocks of each stopping device clamp the elevator guide rail under the effect of elastic force; and when the elevator is closed on a flat floor area, the car door lock is turned on, the two electromagnetic coils of each electromagnetic device are powered on and repel each other, the two edge blocks of each stopping device release the elevator guide rail, and the reset springs are compressed. When the elevator car operates to the flat floor area, the two wedge blocks of each stopping device clamp the elevator guide rail under the effect of the elastic force of the reset springs, door-opening shearing accidents are prevented, and the safety of passengers is guaranteed.

Description

technical field [0001] The invention relates to the technical field of safe operation of elevators, in particular to an elevator and a door-opening anti-shearing device thereof. Background technique [0002] With the continuous development of urbanization, the number of elevators is increasing day by day, the elevators are aging and on-site maintenance is poor, and there are many hidden dangers in elevators. After the elevator door is opened, when passengers enter and exit the elevator, the elevator often has insufficient braking force to cause the elevator to slip, causing passengers to be caught in the elevator entrance, and most of the fatal accidents of passengers are caused by accidental movement failures when the elevator door is opened. Once the existing elevator slides, it is difficult to meet the relevant regulations in the national standard to ensure that the accidental movement of the car in the door area is less than 0.95m, and it is impossible to avoid the accid...

AI Technical Summary

Problems solved by technology

After the elevator door is opened, during the process of passengers entering and exiting the elevator, the elevator often has insufficient braking force to cause the elevator to slip, causing passengers to be caught in the elevator entrance, and most of the fatal accidents of passengers are caused by accidental movement failures when the elevator door opens

Once the existing elevator slides, it is difficult to meet the relevant regulations in the national standard to ensure that the accidental movement of the car in the door area is less than 0.95m, and it is impossible to avoid the accidental movement of the elevator when the door is opened. The function of preventing the accidental movement of the car door area is an urgent problem to be solved in the elevator industry

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