Doors, Gates, and Entrances Flashcards

What is the primary purpose of a hoistway door interlock?

Answer: To prevent the hoistway door from being opened unless the car is within the unlocking zone

The hoistway door interlock prevents the landing door from being opened when the elevator car is not within the unlocking zone, protecting passengers from falling into the hoistway.

What is the maximum average closing force permitted for power-operated hoistway doors per ASME A17.1?

Answer: 30 lbf

ASME A17.1 limits the average closing force for power-operated doors to 30 lbf to prevent injury to passengers who may be contacted by the closing door.

What component mechanically connects the car door to the hoistway door so they open and close together?

Answer: Door coupler or clutch vane

The door coupler or clutch vane is mounted on the car door and engages with a roller on the landing door when the car arrives at a floor, allowing the car door operator to drive both doors simultaneously.

What is the function of a safety edge (mechanical reopening device) on a power-operated elevator door?

Answer: To reverse door motion when physical contact is made during closing

A safety edge reverses door motion upon physical contact during closing, preventing passengers from being trapped or injured by the closing door panel.

What is the key distinction between a car door contact and a hoistway door interlock?

Answer: A car door contact only detects door position electrically; a hoistway door interlock both physically locks the door and contains an electrical contact

A car door contact is an electrical switch that detects car door position only, while a hoistway door interlock both mechanically locks the landing door and includes an electrical contact that must close before the car can move.

What must activate when nudging operation is initiated on a power-operated elevator door?

Answer: A continuous audible signal as the door closes at reduced speed

ASME A17.1 requires that when nudging is activated after a door obstruction exceeds the time limit, a continuous audible signal must sound as the door closes at reduced speed to warn passengers.

What is a vision panel in a hoistway door, and what material does ASME A17.1 require it to use?

Answer: A glazed opening allowing viewing into the hoistway; must use wire glass or approved safety glazing

A vision panel is a glazed opening in the hoistway door; ASME A17.1 requires it to be constructed of wire glass or an approved safety glazing material to maintain the fire-rated integrity of the door.