MULTI-CAR ELEVATOR

摘要

In a multi-car elevator, if two vertically adjacent cars among the cars are designated first and second cars, then: a zone that is a distance in which the second car can be stopped in response to an abnormality, and into which the first car is not permitted to enter is set as an exclusion zone of the second car; a position before which it is necessary for the first car to stop is set as a stopping limit position of the first car; and a plurality of threshold values that progressively detect the abnormal approach are set so as to enable the first car to decelerate and stop before the stopping limit position of the first car.

主权项

1. A multi-car elevator comprising:
a plurality of cars that are disposed inside a shared hoistway; a plurality of control portions that control operation of corresponding cars; and an inter-car collision preventing safety device that is connected to the control portions, and that monitors for an abnormal approach between the cars, wherein, if two vertically adjacent cars among the cars are designated first and second cars, then: a zone that is a distance in which said second car can be stopped in response to an abnormality, and into which the first car is not permitted to enter is set as an exclusion zone of the second car; an absolute position that is advanced by a distance that is greater than or equal to the exclusion zone in a direction of the first car from an absolute position at a leading end of the second car in the direction of the first car is set as a stopping limit position of the first car; and a plurality of threshold values that progressively detect the abnormal approach are set so as to enable the first car to decelerate and stop before the stopping limit position of the first car.