Importance

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Abstract

An elevator door control device includes an obstruction sensor for detecting an obstruction in the vicinity of any one of vertical frame walls of a doorway frame and outputting an obstruction detection signal, and a door control unit for controlling door opening operation and door closing operation of a car door and a landing door in response to the obstruction detection signal. The obstruction sensor has light emitters on the vertical frame walls of the doorway frame and light detectors on the upper frame wall of the doorway frame. The light emitters are located in the vicinity of the lower ends of the vertical frame walls and emit detection light beams substantially along the vertical frame walls. The light detectors are located on the lower surface of the upper frame wall and detect the detection light beams.

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First Claim