Unlocking device for elevator cab door lock

Abstract

The invention discloses an unlocking device for an elevator cab door lock. The unlocking device comprises an unlocking ejector rod, an ejector rod installation base, an ejector rod limiting plate and a pull rope device. The ejector rod installation base is connected with the unlocking ejector rod through an ejector rod rotating center. An ejector rod roller is arranged at the front end of the unlocking ejector rod. A weight is arranged at the front end of the unlocking ejector rod. The pull rope device is arranged at the rear end of the unlocking ejector rod. The ejector rod limiting plate is fixedly arranged on the ejector rod installation base. The initial position of the unlocking ejector rod is horizontal through the ejector rod limiting plate. A limiting rod is fixedly arranged on the ejector rod installation base. The limiting rod is used for controlling the maximum rotating angle of the unlocking ejector rod. When emergency rescue is performed, the cab door lock can be opened or the cab door lock is kept in the opening state by pulling a pull rope, and therefore the phenomenon that a rotating hook of the cab door lock is located on a portal crane beam is effectively dealt with.

Description

technical field [0001] The invention relates to an elevator component, in particular to an unlocking device for an elevator car door lock. Background technique [0002] In the process of the elevator running up and down, in order to prevent passengers from falling down the hoistway after opening the door in the non-unlocking area, the car is required to be equipped with a mechanically locked car door lock, and when the car is opened outside the unlocking area, the car door cannot be opened. Greater than 50mm. In addition, it is also required that when the elevator fails, if the car is in the accidental movement protection area (UCMP area), the corresponding landing door can be opened, and the car door can be opened from the landing without tools, such as triangular unlocking tools or tools permanently installed on site. except. When the car is in the accidental movement protection area, it is outside the unlocking area. The landing door knife on the landing side cannot rel...

AI Technical Summary

Problems solved by technology

In this way, if the stay cord is installed on the swivel hook, since the swivel hook is fixed on the beam, the stay cord cannot extend from the fixed swivel hook to the moving car door (the stay cord will be pulled when the car door moves )

When the car is leveling, due to the function of unlocking the baffle, opening the landing door will also open the car door at the same time, so that people in the car can be rescued. However, if the car cannot be leveled, after opening the landing door, the car door will still If the car door lock is closed and the position of the car door lock is much higher than the floor of the landing, it is difficult to open the car door lock without a pull rope device, and it is impossible to rescue the people in the car in time

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