Light curtain for elevator doors reopened.

摘要

The invention relates to a device for detecting an object NEXT TO AN ELEVATOR DOOR FORMED BY A CASING SET ON TOP EDGE OF AN OPENING DOOR CABIN IN WHICH ARE STAYING A SERIES OF PAIRS OF SENSORS SHORT SCOPE AND A SERIES OF PAIRS OF SENSORS reaching. Each pair of short-range sensors CONTAINS AN ISSUER (14, 25) generating an infrared beam (18, 27) relatively short reach in the direction of travel (16) of a lift gate (17) BEYOND OPENING THE DOOR, AND A WELL SHORT RANGE (15, 26) detecting the reflection of light on a front surface (17B) of the door, creating a detection signal SHORT RANGE BEAM. Each pair of long-range sensors is positioned beside the corresponding PAR SCREENING OF SHORT RANGE AND CONTAINS AN ISSUER (19, 28) generating an infrared beam (21, 30) RELATIVELY LONG REACH BEYOND THE PATH OF THE DOOR ELEVATOR and a receiver (20, 29) detecting reflection (23) SPOKE IN AN OBJECT (22) IN THE VICINITY OF THE DOOR OPENING, CREATING A SENSE signal RAY-reaching.