Patent ID: 11873192
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Handling (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 1:
2. The elevator door control system according to claim 1, wherein
an interval between an upper limit and a lower limit of displacement corresponding to a range between a door fully open position and a door fully closed position is divided into a plurality of consecutive sections, and a door position during the door opening/closing operation is handled using the section corresponding to the door position concerned, and,
the partially broken state determination circuitry includes counting circuitry in which counting is performed for each of the sections corresponding to a door position at the time of the change in the binary signal in response to the change in the binary signal indicating the detection of an obstacle, the change being obtained during a plurality of door opening/closing operations on the same floor, and determines that the cable is in the partially broken state when a counting result of the counting circuitry exceeds a predetermined threshold value.