Abstract

In an elevator system in which two cars operate in each shaft, there is provided an elevator group control apparatus providing efficient services while preventing collisions of cars in each shaft. The elevator group control apparatus includes a traffic detection part which detects data of car traffic generated in a building; a zone setting part which sets a dedicated zone and a common zone for each of upper and lower cars in accordance with detection by the traffic detection part; an assignment decision part which decides a car to be assigned to a call generated at a hall in accordance with the call generation floor, direction of response to the call, and a zone set by the zone setting part; an entry determination part which, when a first of two cars in each shaft is coming into the common zone from its dedicated zone, determines, based on position, direction of movement, and state of the other car in the same shaft, whether the first car in each shaft is permitted to enter the common zone; a passing-by instruction part which gives a passing-by instruction to a prescribed floor in the dedicated zone to make each car exit from the common zone to its dedicated zone after each car has entered the common zone; and an operation control part which controls operation of each car based on a decision by the assignment decision part, a determination by the entry determination part, and an instruction by the passing-by instruction part.