| 摘要 |
PROBLEM TO BE SOLVED: To provide a screw locking fixture which can prevent a existing combination of a bolt and nuts from coming apart when the screw locking fixture is provided thereto. SOLUTION: A slide nut 5 is rotatably accommodated within a cylindrical outer tube 7 formed with a through hole 15 on its outer circumferential face, while the slide nut 5 is formed with a fixing hole 14 at a position corresponding to the through hole 15. A connecting pin 16 is introduced into the fixing hole 14 through the through hole 15 so as to restrict rotation of the slide nut 5. Then, as it is, the slide nut 5 is threadedly engaged with a bolt 1 through nuts 2. Just when the fastening of the slide nut 5 is over, a large fastening torque is applied to the outer tube 7 so as to shear the connecting pin 16. Thereby, the outer tube 7 is idly rotated around the slide nut 5 so as not to be detached, preventing the nuts 2 covered with the outer tube 7 from being loosened. Accordingly, if this screw locking fixture is used for fastening of a steel tower and the like, artificial damage is prevented from occurring.
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