Patent ID: 6626268
Filing Date: 2003-09-30
Classification: E05F,E05Y,G01V

Abstract:
An opening and closing apparatus for an elevator door comprising:a light-emitter for emitting a reflection detection beam toward a landing side obliquely, relative to an opening and closing direction of an elevator door, said light-emitter portion being disposed in one of (i) a mount positioned on a doorstop edge of the elevator door and (ii) a facing portion facing the mount; a light-detector for detecting the reflection detection beam reflected by an obstruction on the landing side, said light-detector being disposed in the other of (i) the mount and (ii) the facing portion; a reflection detector for detecting the reflection detection beam entering said light-detector and outputting a reflection detection signal; and a door control for controlling opening and closing of the elevator door in response to the reflection detection signal from said reflection detector, wherein said door control invalidates the reflection detection signal if the reflection detection signal is input a number of times in succession.