| 摘要 |
PROBLEM TO BE SOLVED: To provide a locking fastening unit capable of increasing locking effect by locking a bolt and a nut to each other by disposing at least one engagement member between the bolt and the nut.SOLUTION: A locking fastening unit includes a bolt having a head portion and a screw shaft connected to the head portion at its upper end and provided with a thread on its peripheral face, at least one accommodation groove formed on a peripheral face of the screw shaft of the bolt and having an opening angle not equal to 90 degrees with respect to its longitudinal direction and an axial direction of the screw shaft, a nut having a screw hole having a hole wall surface, and engaged with the screw shaft of the bolt, at least one accommodation space disposed on the hole wall surface of the nut and having an opening angle not equal to 90 degrees with respect to its longitudinal direction and an axial direction of the screw hole, and at least one engagement member composed of a strip-shaped elastic body, and having a locking portion and an accommodation connecting portion. |
