Elevator system, including control method for controlling, multiple cars in a single shaft

An elevator system in which a plurality of cars are provided in the same shaft, the system comprising:

• a call registerer for registering a hall call by entering a destination floor
• a tentative assignment finalizing unit for tentatively assigning a first car in response to a first hall call entered through the call registerer;
• and
• a reassigning unit for changing a car assignment for responding to the first hall call if a second hall call, different from the first hall call, occurs after the first car has been tentatively assigned, according to a destination floor entered at the first hall call and a destination floor entered at the second hall call.

An elevator system in which a plurality of cars are provided in the same shaft, the system comprising:

• a call registerer for registering a hall call by entering a destination floor;
• a tentative assignment finalizing unit for tentatively assigning a first car in response to a first hall call registered by the call registerer;
• and
• a reassigning unit for changing a car assignment of the first car for responding to the first hall call to a second car, different from the first car, after tentatively assigning the first car, depending upon traffic of the elevator system, wherein the call registerer includes displaying means for displaying a destination floor of the second car, according to a car reassignment performed by the reassigning unit.

An elevator system in which a plurality of cars are provided in the same shaft, the system comprising:

• a call registerer for registering a hall call;
• a tentative assignment finalizing unit for deciding on a shaft to be assigned in response to a first hall call registered by the call registerer and for tentatively assigning a first car in the shaft assigned to respond to the first hall call;
• and
• a reassigning unit for changing a car assignment for responding to the first hall call to a second car in the shaft assigned to respond by the tentative assignment unit, after tentatively assigning the first car, depending upon traffic of the elevator system.

A car assignment control method for an elevator system in which a plurality of cars are provided in the same shaft, the method comprising:

• entering a first hall call;
• tentatively assigning a first car in response to the first hall call;
• and
• changing the car assignment for responding to the first hall call to a second car, different from the first car, after tentatively assigning the first car, depending upon traffic of the elevator system, only if a time period before the first car arrives at the floor where the first hall call occurred has not been reached.

An elevator system in which a plurality of cars are provided in the same shaft, the system comprising:

• a call registerer for registering a hall call;
• a tentative assignment finalizing unit for tentatively assigning a first car in response to a first hall call registered through the call registerer;
• and
• a reassigning unit for determining whether a time period before the first car arrives at the floor where the first hall call occurred has been reached, and, if the time period has been reached, preventing changing of the car assigned for responding to the first hall call.