LOOSENESS DETECTION DEVICE OF ROTATION FASTENER, CORROSION PREVENTION METHOD OF ROTATION FASTENER IN WHICH LOOSENESS DETECTION DEVICE OF ROTATION FASTENER IS INSTALLED AND LOOSENESS DETECTION SYSTEM OF ROTATION FASTENER

To provide a looseness detection device of a rotation fastener and a looseness detection system of the rotation fastener which can arbitrarily set a rotation angle of detecting looseness of the rotation fastener in multiple stages, and also to provide a looseness detection device of a rotation fastener, a corrosion prevention method of the rotation fastener in which the looseness detection device of the rotation fastener is installed, and a looseness detection system of the rotation fastener to which a corrosion prevention structure can be easily applied.SOLUTION: A looseness detection device 1 of a rotation fastener comprises: a rotation member 30 which is engaged with the outer shape of a nut 103 and is provided so as to be rotatable according to the rotation of the nut 103; a fixation member 50 which is arranged along the rotation member 30 and is fixed to a base; and an RFID tag 60 which has antennas 61a, 61b, 62a, 62b and state detection wires 61c, 62c. The RFID tag 60 is provided in one of the rotation member 30 and the fixation member 50, and a cutting unit 40 is provided in the other. The cutting unit 40 cuts the state detection wires 61c, 62c with rotation of the rotation member 30.SELECTED DRAWING: Figure 10 【課題】回転締結具の緩みを検出する回転角度を複数段階で任意に設定可能な回転締結具の緩み検知装置、回転締結具の緩み検知システムを提供する。また、防食構造を容易に適用可能な回転締結具の緩み検知装置、回転締結具の緩み検知装置が設置された回転締結具の防食方法、回転締結具の緩み検知システムを提供する。【解決手段】回転締結具の緩み検知装置１は、ナット１０３の外形形状と係合し、ナット１０３の回転にしたがって回転可能に設けられた回転部材３０と、回転部材３０に沿って配置されベースに対して固定された固定部材５０と、アンテナ６１ａ、６１ｂ、６２ａ、６２ｂ、及び、状態検出用配線６１ｃ、６２ｃを有するＲＦＩＤタグ６０と、を備え、回転部材３０と固定部材５０とのうち一方にＲＦＩＤタグ６０が設けられ、他方に切断部４０を備え、切断部４０は、回転部材３０の回転によって状態検出用配線６１ｃ、６２ｃを切断する。【選択図】図１０