| 摘要 |
PURPOSE: To prevent service lowering by eliminating operation temporarily from group control to perform backup action when a door-open time prolonging button is operated, and also releasing the operation under a given condition to invalidate the operation of a time prolonging button during fixed hour. CONSTITUTION: When the open-prolonging button 1 of a machine F is operated, an open-prolonging button operation relay 1A is energized to open-circuit the normally-closed contact 1Ad, and an in-group control detection relay 4A is de-energized to eliminate the machine F from group control operation. At that time when a common landing call is allotted already from a group control device, the machine F is released from allocation, and additional allocation is made to machine G or H. The number of elevators in a group control is reduced by the operation of the open-prolonging button, and when a means waiting time exceeds a given value, a mean waiting time detection relay contact 8 is closed to energize an open-prolonging button operation limiting relay 7A to release open-prolonging operation, but the relay 7A is self held and remains energized, then de-energized after a given time to validate the operation of open-prolonging buttons 1-3, thus preventing service lowering. |
