| CPC B66B 5/0031 (2013.01) [G01R 19/16571 (2013.01); H02J 1/06 (2013.01)] | 17 Claims |
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10. An elevator derailment detection device, which is configured to detect derailment in which an elevating body guided by a guide rail to raise and lower disengages from the guide rail, the elevator derailment detection device comprising:
a first conductive wire and a second conductive wire, which are provided in a hoistway in parallel with an elevating direction of the elevating body;
a derailment detector configured to detect the derailment;
a power supply including a first DC power supply configured to output a first DC voltage to apply a voltage to the first conductive wire and the second conductive wire;
a contact, at the elevating body, and is configured to be brought into contact with the first conductive wire and the second conductive wire when the derailment occurs, to thereby bring the first conductive wire and the second conductive wire into conduction with each other and achieve a state in which an overcurrent flows into the first DC power supply;
a switch configured to switch a state of connection between the power supply and a diagnosis target, which includes the derailment detector, between a conductive state and a non-conductive state; and
a controller configured to perform diagnosis processing for diagnosing the diagnosis target,
wherein the derailment detector is configured to detect the derailment by detecting the overcurrent, and
wherein the controller is configured to control the switch in the diagnosis processing to inspect a behavior of the diagnosis target, to thereby diagnose soundness of the diagnosis target.
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