| 摘要 |
PROBLEM TO BE SOLVED: To provide a misalignment detection tool, a misalignment detection device, and a misalignment detection system that can readily and stably detect relative misalignment between members and, more particularly, can readily and stably detect misalignment (loosening) between a fastening body and a fastened body.SOLUTION: A loosening detection tool 10 for detection of loosening between a bolt 22 and a nut 21 for fastening a wheel 31 and a hub part 32 is provided with a plurality of IC tags 15 disposed on the surface of the wheel 31 and a shield plate 11 so arranged as to be able to shield the IC tags 15 and to rotationally shift integrally with the nut 21 to intercept communication of the IC tags 15. The shield plate 11 has openings 111 and 112 and, in a state free from loosening, exposes one IC tag 15A and shields all other IC tags to intercept communication. When the nut 21 loosens, the plate shields at least a portion of the IC tag 15A and exposes another tag 15D, different from the tag 15A, to make communication possible. |
