| 摘要 |
PURPOSE:To prevent the running of an elevator from being interrupted by a mischief by compulsorily switching to reference floor return operation if a cage being operated remains stationary on a floor other than the reference floor for longer than a specified time, and outputting an alarm if the cage still remains stationary after the reference floor return operation. CONSTITUTION:If a cage is stationary, the output (a) contact of a cage stop state detection device LS is closed, and the cage stays on a floor other than a reference floor, the output (a) contact of the cage position detection device 7 is closed and timers T1, T2 start counting. When the timer T1 counts up to close its output (a) contact T1, a reference floor return instruction is output to an operation control device 8 to cause the elevator to return to the reference floor. If operation is impossible for any reason at this point of time, the timer T2 further continues counting. When the timer T2 counts up to close its output (a) contact T2, an alarm device 10 starts operating to inform an administrator of the situation. |
