ĭoor restrictor Main article: Door restrictor ĭoor interlocks Main article: Door interlocksĭoor interlocks prevents the door from being opened unless the car is present and completes an electrical circuit.

Memco is the first manufacturer produce sensors with door warning LED lamps. Nowadays they are only found on some Schindler elevators in Hong Kong, Kone elevators in the United States, Otis elevators in the UK and some generic elevator companies elevators in the UK. These are installed on both side of door edges, and lights up in green when the doors are opening, and flashes red when closing. Some modern infra red sensors used in Otis, and fewer Schindler and Kone elevators may emits a continuous beeps when the sensors triggers an object. Old elevators may using small light bulb for sensors lighting located on the knee level of the car door jamb (like Sabiem Elevator). If the sensors triggers a person or an object, it will cause the doors to reopen and does not close until the person moved away or the object is removed from the doorway. The beam detects objects on the doorway when opening and closing. Infra red door sensors or beams are now common in modern days elevator. Mechanical door bumpers (or door buffers) are usually found in older elevators or elevators installed in Asia, especially on elevators installed by Mitsubishi, Hitachi, and others. Mechanical bumpers Main article: Door bumpers The automatic elevator car door operator is the device usually installed on the top of the elevator car to operate the doors opening and closing. There are two elevator door types: manual and automatic.Įscape hatch/Liftwell rescue doors Elevator door devices Door operator Main article: Door operator Types of elevator doors Main article: Elevator door types

Elevator door dwell time elevatortrader