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What Is the Function of Elevator Door Lock?

In elevators, the elevator door lock plays an important role. So what are the functions of elevator door lock devices?


1. The function of elevator door lock

The elevator door lock is installed on the landing door or the car door to lock it. Elevator door locks include mechanical door locks and electric door locks. The mechanical one is to ensure that the elevator door cannot be opened under the action of external force and to ensure the safety of personnel. The electrical one is to make sure that the elevator can run only when the door interlock is open. Both are complementary to each other and are indispensable.


2. The structure of elevator door lock

The elevator door lock is composed of electrical and mechanical parts. The electrical part is to control the elevator door lock circuit, which is divided into the main lock and auxiliary lock to prevent the door lock circuit from failing and causing accidents. The role of the mechanical part is the response of the door opener to prevent the function of opening the door at will without tools. Generally, the design and production must be tested by the authoritative department before it can be put into use.


The elevator door lock is mainly composed of a lock hook, lock block, force application element, roller, door unlocking wheel, electric safety electric shock, and triangle lock. The function of the lock hook and the lock block is to lock the door from being opened, the engagement depth must be more than 7mm, and the endurance should be more than 1000N. The force component is used to automatically reset the door lock after opening the door. It is a reset device (when it fails, the door lock cannot be opened by gravity). The roller and the door unlocking wheel are used for unlocking. When the elevator arrives, the door motor is driven by a series of mechanical drives, and then the door knife is used to drive the roller and the door unlocking wheel to open the door lock and pull the door to open. Electrical safety electric shock is to verify whether the lock hook and the lock gear are engaged to 7mm. Once the electric safety electric shock is disconnected, the elevator will not run.

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