| 摘要 |
PURPOSE:To reduce manufacturing cost of a door device, and secure opening- closing operation by unification of a beam of light or the like. CONSTITUTION:A through hole 4 is arranged in parallel to the reciprocating direction in an automatic door 1 to be reciprocated by a motor 37 so as to protrude in and retreat from an opening part 32 from inside walls 35 and 36, and a light emitting unit 6 to emit a beam L of light coincident with the central exis of the through hole 4 and a light receiving unit 7 to receive the beam L of light passing through the through hole 4, are respectively arranged in one and other walls 36 and 35 of the opening part. A push-button 8 whose tip part 8a is energized by a spring 9 so as to project outward and which cuts off the beam L of light only at pressing time of a user, is arranged on the automatic door 1, and a control part 10 is arranged to output a command signal to the motor 37 so as to move the automatic door forward or backward according to an output signal of the light receiving unit 7 and an opening-closing condition of the automatic door 1. |
