| 摘要 |
PURPOSE:To reduce the number of inspectors by installing a means which short- circuits the all-time closed contact point of a safety switch in a machine room by the signal for detecting the calling state of an interphone in a cage and suppresses the operation. CONSTITUTION:In inspection work, the clip terminal 17C of a short-circuit circuit 17 is connected with the parallel terminals t1 and and t2 of an all-time closed contact point 9b of a safety switch in a machine room, and a microphone 17M is set in the vicinity of the buzzer 13Z of an interphone 13. The buzzer 13Z of the interphone 13 is operated by the operation of the calling button 14p of an interphone 14, and the sound is detected by the microphone 17M, and the all-time closed contact point 9b is short-circuited by the operation of a relay after amplification, and the operation of the safety switch is put into cut state. Since the cut-off of the operation of the safety switch can be controlled from the inside of the cage by utilizing the interphone which is already installed, the number of operators in inspection work can be reduced, and the inspection cost can be reduced. |
