| 摘要 |
PURPOSE:To keep off any continuous operation due to mischief by stopping an elevator once at the floor as long as a specified time interval with a timer device unless a fact that a door is opened is detected after the elevator has finished its travel operation. CONSTITUTION:When an elevator cage travels and arrives at the destination floor, a stop command contact point S is opened whereby an up operating relay 1 is demagnetized and it comes to a stop, and a travel operation detecting relay 4 is also demagnetized. At this time, if a floor door or a cage door is opened, a door-shut detecting relay 3 is demagnetized, and if a door-open detecting relay 5 is once demagnetized after travel operation completion, it is so judged that boarding or alighting action by people has been carried out. On the other hand, when the door is not opened, the relay 5 is in a state of being excited whereby each making circuit of both up and down operation relays 1, 2 is not formed, so that a timer relay 6 is operated, and the elevator cage is stopped at the floor as long as the specified time. Thus, such tampering operation as operating the elevator continuously without entailing any door-open action after the travel operation completion is thus preventable. |
