| 摘要 |
PROBLEM TO BE SOLVED: To provide a bolt and a nut with a structure which surely restrains loosening by a vibration, an impact and the like which are continuously generated with only one locking although the structure is simplified. SOLUTION: An opposed pair of hexagon nut frames are connected by a connecting main body 4 which engages a connecting ring 4A in both ends part of a connecting steel pipe 4B. A locking structure of the double nut 5 and the bolt 6 comprises the double nut 5 composed after engaging the nut threaded with different inside diameter left handed screw and right handed screw on the shoulder C formed in the internal circumferential part of a pair of hexagon nut frames and the double nut 5 composed of the bolt 6 having a bolt shaft 7 which is provided by engageable screws, making the bolt shaft tip end as the starting point. By this way, in the traditional bolt and nut locking structure, minute parts by which a plurality of compositions are actualized, are required and the damage problem of nut parts are solved owing to wear-out, rust and the like. COPYRIGHT: (C)2006,JPO&NCIPI
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