Fall-preventing emergency device for elevator

Abstract

The invention particularly relates to a fall-preventing emergency device for an elevator, and aims at providing a fall-preventing safety system which is simple in structure, low in cost, safe and reliable, and effectively protects the safety of passengers. The fall-preventing safety system comprises airbag assemblies, wherein each of the airbag assemblies comprises a safe airbag, an air generator, an ignition device and an electronic controller; the airbag assemblies are arranged in accommodating holes which are formed under an elevator gateway and horizontally formed in the side wall of an elevator shaft; grooves are formed in a side wall opposite to the other side with the accommodating holes, of the elevator shaft; a speed sensor and a height sensor are arranged in a lift car; output signals of the speed sensor and the height sensor are transmitted to the electronic controller. According to the fall-preventing emergency device disclosed by the invention, when the lift cars falls, one or a plurality of airbags, which are the closest to the lift car under the lift car act so as to open the airbags, so that the falling speed of the lift car is decreased rapidly until the lift car stops falling; because the fall impact force of the lift car is small, the body safety of the passengers can be protected effectively.

Description

technical field [0001] The invention relates to the technical field of elevator safety, in particular to an emergency device for preventing falling of an elevator. Background technique [0002] The current car-type elevators are all equipped with emergency braking devices. When a safety failure occurs, such as abnormal elevator speed, the brake shoes are usually used to clamp the elevator guide rail to produce braking. However, when the elevator guide rail breaks or other failures occur, emergency The braking device will fail and cannot work; when the car is on a higher floor, the safety of passengers cannot be guaranteed. When the guide rail breaks and the car falls, the safety protection measures for passengers in the car are as follows: a buffer device is installed at the bottom of the car elevator, as in the prior art CN201320894008, an airbag assembly is arranged at the bottom of the car When falling, rely on the buffer device at the bottom of the car or the bottom of ...

AI Technical Summary

Problems solved by technology

The technology in this patent may cause the danger of failure due to the failure of the braking mechanism. At the same time, the side wall of the elevator passage is often damp and the friction coefficient is reduced, which increases the risk of failure of the braking mechanism.

When the car brakes in the elevator shaft, it is impossible to control the stop position of the car after braking. If the car is parked between two floors, the car door is difficult to open and rescue work cannot be carried out.

[0004] Another way is to set the safety guide rail separately in the elevator shaft for contact friction braking, which will add an additional set of guide rail mechanism, which will increase the equipment cost and the difficulty of later maintenance and repair

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