Elevator doors can prevent passenger falling to the hoistway. It can also offer an access into the elevators.

Elevator doors are set of doors that prevent passenger from falling onto the hoistway.

Types of elevator doors

Main article: Elevator door types

There are two elevator door types: manual and automatic.

Escape hatch/Liftwell rescue doors

Elevator door devices

Mechanical bumpers

Main article: Door bumpers

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.

Door sensors

Main article: Door sensors

Infra red door sensors or beams are now common in modern days elevator. The beam detects objects on the doorway when opening and closing. 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[1]. Old elevators may using small light bulb for sensors lighting located on the knee level of the car door jamb (like Sabiem Elevator). 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.

Door warning LED lamps

These are installed on both side of door edges, and lights up in green when the doors are opening, and flashes red when closing. 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. Memco is the only manufacturer produce sensors with door warning LED lamps.

Door interlocks

Main article: Door interlocks

Door interlocks prevents the door from being opened unless the car is present and completes an electrical circuit.[1][2]

Door keyhole

Main article: Door keyhole

Door keyhole is used to unlock the landing doors and it is usually done by elevator technicians in elevator maintenance or in the event of an emergency like entrapment. Most elevators have their door keyhole located on one door panel and aligned to the edge of the door, while some others may be located on the upper door jamb (like modern day Schindler, Kone, and ThyssenKrupp elevators). Different elevator manufacturers have their own keyhole type. Except all are only one type for some country code.

Elevator door control

Main article: Elevator door control

Elevator door control buttons are used to control the elevators' doors. In some modern elevator brands like Mitsubishi and Hitachi, the door open and close buttons will be lit when the button is held and unlit when unheld, and the door hold button will be lit when pressed and unlit when the door closes.

Automatic elevator door design

Painted steel doors

These are just elevator doors painted with single color.

Laminated stainless steel doors

These are stainless steel doors that are covered with laminated sheet contains either plain single color or texture. This design of doors is commonly found in older elevators and commonly on the car doors.

Plain stainless steel doors

These are just basic, stainless steel hairline elevator doors (or patterned stainless steel elevator doors with one color or mirrored stainless steel elevator doors).

Decorative stainless steel doors

These are elevator doors decorated with textures or patterns (with multi-color or texture style), usually provided by elevator manufacturers. A plain stainless steel doors may also covered with advertisement posters which are usually found in shopping centres and fewer hotels. Another design is that the elevator doors are etched with a custom sign or even a logo of a certain company[2], retails, or building.

Glass doors

Glass doors are common in almost every buildings such as shopping malls, hotels, office buildings, parking garages, railway or subway stations, airports, and sometimes pedestrian footbridges. Glass doors usually comes in full glass (either with frames or not) and partial glass. Glass doors are useful to enchance security inside the elevator and to prevent crime and vandalism.

Elevators with manual doors may also have glass on the door as well.

Notes and references

  1. 1.0 1.1 Guidelines for Modernising Existing Lifts (Electrical and Mechanical Services Department, Hong Kong)
  2. 2.0 2.1 What is an elevator? (by Dover Corp.)

See also

External links


Drive systems: Traction • Winding Drum • Hydraulic

Types of elevators: Double DeckDumbwaiterFireman'sFreightIncline • PassengerResidentialWheelchair lift

Concept: Destination dispatchElevator algorithm • Elevator control systemElevator machine room • Elevator maintenanceElevator major alterationsElevator modernizationMachine room less elevator

Elevator systems, controllers and equipments: Elevator fixtures • Elevator keys • Elevator special modesElevator doorsDoor camDoor interlocks (Interlock wiring communication system) • Door restrictorElevator Inspection CertificateEmergency stop buttonFloor designatorsGate switch • Old Deadman controls • Overspeed governorMotor-generator set & Silicon-controlled rectifier (for DC-powered elevators) • Insulated-gate bipolar transistor (for AC-VVVF-powered elevators) • Regenerative converter (for AC-VVVF-powered elevators)

See also: List of elevator fixtures guide • List of elevator and escalator companies • Elevator door sill guide (Generic elevator component door sill guide) • Floor numbering (Unlucky floor numbers) • Elevator incidents and accidents

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