Patent ID: 6318508
Filing Date: 2001-11-20
Classification: B66B

Abstract:
An elevating system control method for synchronously elevating a plurality of elevating devices each of which has an elevator, an actuator elevating the elevator and a detector detecting a position of the elevator and for moving the elevating devices to a designated movement destination position by on/off controlling the actuator based on a result of detection of the detector for each control period, comprising the steps of:calculating a position of each elevator in accordance with the result of detection of the detector;determining the farthest elevator from the designated movement destination position as a reference elevator based on the calculated position of each elevator;calculating position deviations of other elevators with respect to a position of the reference elevator;deciding whether the position deviation of each of the elevators other than the reference elevator is within a first predetermined range;off controlling the actuator of the elevator which is decided to have the position deviation outside the first predetermined range; andon controlling the actuators of the elevator decided to have the position deviation within the first predetermined range and the reference elevator,the steps being repeated for each control period.