Device for preventing accidental movement of elevator car

Abstract

The invention discloses a device for preventing an elevator car from moving accidentally. The device comprises a safety gear and an intermittent transmission mechanism for driving separation and reunion of the safety gear through a car door, wherein the safety gear comprises safety gear bodies whose front sides are open and clamped on guide rails; each safety gear body comprises an inner casing arranged in an inner cavity of a casing, a rectangular opening is formed in the rear wall of the casing, a horizontal pipe cavity extending out of the rectangular opening is formed in the inner casing, a horizontal locating screw for locating the inner casing is arranged on the left side of the casing, a first horizontal movable screw with one end fixedly connected in the inner side wall of the inner casing is arranged on the right side of the casing, and a first elastic piece located between the inner casing and the casing is arranged on the first horizontal movable screw. The device has the advantages as follows: linkage with the car door is realized, serious safety accidents caused by accidental moving of the elevator car are completely eradicated, and the accidental moving distance of the elevator car is shortened effectively due to absence of a speed detection and feedback process.

Description

technical field [0001] This invention relates to elevator cars, and more particularly to means for preventing unintentional movement of elevator cars. Background technique [0002] With the rapid development of modern urban construction, high-rise residential buildings and office buildings have sprung up one after another, and the use of elevators has increased accordingly. During the use of the elevator, according to the working procedure, when the elevator car reaches the designated floor and the door is opened, the car can continue to rise or fall after the car door is closed. However, the elevator often has a car slipping phenomenon after arriving at the designated floor and the car door is opened, that is, the car moves upwards or downwards unexpectedly, which causes people to be injured and dead by the elevator. [0003] At present, the devices for preventing the car from moving unexpectedly are mostly composed of detection devices, control circuits and braking compon...

AI Technical Summary

Problems solved by technology

The deficiencies in the above-mentioned device for preventing accidental movement of the car are: 1. The protection process has nothing to do with the opening and closing of the car door, and cannot fundamentally solve and prevent the accident of car accidental movement (only the car accident occurs when the car door is opened). Casualty accidents may occur only when moving); 2. The braking force or torque acts on the steel wire rope hanging the car or uses the working brake to stop; acting on the steel wire rope will make it seriously worn, and using the working brake to stop and the brake failure will cause serious wear and tear. There is incompatibility between the two that cause unexpected movement of the car; it cannot prevent the unexpected movement of the car caused by the failure of suspension ropes, traction wheels, rollers, etc.

At the same time, there is a delay in the detection and control process that prolongs the distance of accidental movement, and there is still a risk of personal injury; there are many electrical components involved in the detection and control circuit, and there is also a risk of failure of the protection function, which is contrary to the elevator regulations "do not use electrical, hydraulic and Pneumatically operated device to operate the safety gear" principle

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