| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology to detect an abnormality of a rope-shaped body at an early stage.SOLUTION: An abnormality detection device 10 is a device for detecting an abnormality of rope-shaped bodies 67 for suspending and supporting a lifting body 65, and includes a lift stop sensor 11 for detecting a height direction position of a front end part 65a of the lifting body 65; a lift slowing-down sensor 13 for detecting a height direction position of a rear end part 65b of the lifting body 65; and a stretch determination part for determining which of a plurality of the rope-shaped bodies 67 is stretched using the result of the detection by the lift stop sensor 11 and the lift slowing-down sensor 13. Even before the rope-shaped bodies 67 break, it is possible to determine which of the plurality of the rope-shaped bodies is stretched by detecting the height direction position of the lifting body 65 at a plurality of parts, and an abnormality of the rope-shaped bodies 67 can be detected at an early stage. |
