Patent ID: 7389857

Claim:
An elevator group control apparatus which controls an elevator system in which an upper car and a lower car serve in a single shaft and go up and down therein independently, comprising: a destination floor registration device to register a destination floor, installed at each hall where the upper car or the lower car may stop; car travel range calculating means for calculating travel range of a car assigned provisionally to a destination call registered by the destination floor registration device and travel range of the other car in the shaft where the provisionally assigned car serves; assignment candidate selecting means for selecting a car as a candidate for assignment to a destination call, based on a calculation by the car travel range calculating means; evaluation index calculating means for calculating an evaluation value for each of the cars selected as candidates for assignment to the destination call by the assignment candidate selecting means; assigning means for finally determining which of the candidates is to be assigned to the destination call, based on a calculation by the evaluation index calculating means; and operation control means for control by operation of the car assigned, based on the destination call registered.