Patent ID: 6340073
Filing Date: 2002-01-22
Classification: B66B

Abstract:
Elevator door system comprising:a hatch door mounted on each floor in a building through which passengers board on/off an elevator; a car door installed to an elevator car, through which passengers board on/off the elevator; a motor mounted on the elevator car for providing rotating force to open and close the hatch door and the car door; power transmitting means for converting the rotating force to power in order to move the hatch door to an opening or closing position; a rack connected to the power transmitting means for possibly moving horizontally in accordance with the power transmitting means; a pinion engaged with the rack, the pinion rotating by horizontal movement of the rack; clutch means connected to the pinion for transmitting or cutting off power toward the hatch door; and door lock means engaged with the clutch means, the door lock means positioned in a lock release state in which the hatch door is movable when the clutch means transmits power, while positioned in a lock state for fixing position of the hatch door when the clutch means cuts off power.