Protection device for abnormal movement during lift car leveling opening

Abstract

The invention discloses a protection device for abnormal movement during lift car leveling opening, which can prevent a lift car from moving when a lift car door is in an open mode. The protection device of the invention comprises control devices, action protection devices, bearing devices, a supporting part, an electric protection device and a warning device, wherein the control devices are fixed at the bottoms of two sides of the lift car door; the action protection devices are fixedly installed at the heads of two sides of the supporting part, and the middle part of the supporting part is connected with the bottom of the lift car; each bearing device is arranged in each leveling position in the shaft wall, and is matched with the corresponding action protection device; each action protection device is driven by the corresponding control device to reciprocate; when the lift car door is completely opened, the control devices drive the action protection devices to be embedded into the bearing devices, and keep the balance of the whole lift car when the lift car generates a movement trend; the electric protection device cuts off the electric circuit of a lift when the lift car is in the process of opening; and the warning device actuates a warning circuit when the lift car generates a gliding trend, and warns to prevent the use of the lift in an abnormal state.

Description

technical field [0001] The invention relates to an elevator safety protection and control technology, in particular to a device for preventing the operation of the elevator through a reliable mechanical method when the elevator is leveling and the car door is opened. Background technique [0002] At present, when the elevator stops at the leveling position and the door is opened for people and goods to enter and exit, the stop and maintenance of the elevator depends on the braking device on the traction machine to hold the traction sheave tightly, and the distance between the traction sheave and the traction wire rope is as designed. It is required to generate a traction friction force suitable for the rated load of the car, which overcomes the unbalanced pulling force transmitted to the traction wire rope by the counterweight system of the car to form a static system. [0003] In the above cases, the following security risks may arise: [0004] 1. When the maintenance pers...

AI Technical Summary

Problems solved by technology

[0004] 1. When the maintenance personnel operate improperly, or short-circuit the safety circuit, or the elevator running contact is accidentally connected, the elevator may run with the door open;

[0005] 2. When the elevator braking device fails due to wear and tear, the braking friction of the brake is not enough to overcome the system load;

[0006] 3. When people and goods enter the car and exceed the carrying capacity of the system, the buzzer of the elevator car should sound to remind people to pay attention, but when the passengers do not have the ability to recognize the sound, or the buzzer fails, it will not sound , people and goods continue to enter the car, resulting in excessive weight of the car, when the unbalanced tension of the traction wire rope overcomes the friction between the traction sheave and the traction wire rope

At present, accidents of casualties due to abnormal movement of the car occur from time to time

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