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

Claim 0:
1. An elevator door control system comprising:
a door sensor to detect an obstacle against a door opening/closing operation at an entrance of an elevator;
door motor controlling circuitry to control the door opening/closing operation based on a detection result of the door sensor;
a transmitter to transmit a signal between the door sensor and the door motor controlling circuitry, the transmitter being wired by a cable as part of or all of a transmission path between the door sensor and the door motor controlling circuitry;
a storage to store a change in a binary signal indicating detection of an obstacle in association with a door position at a time of the change in the binary signal, the change being obtained based on a detection signal of the door sensor during the door opening/closing operation; and
partially broken state determination circuitry to determine whether or not the cable is in a partially broken state based on a timing of the change in the binary signal and a door position at the time of the change in the binary signal, wherein
the cable is arranged along a link mechanism that performs an extension motion and a bending motion accompanied by the door opening/closing operation, and is fixed to the link mechanism at a plurality of portions, and
the partially broken state determination circuitry determines whether or not the cable is in the partially broken state based on reproducibility of the door position at the time of the change in the binary signal.