| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily remove a stud bolt from a work surface, and to easily reuse that by suppressing a damage of the removed stud bolt.SOLUTION: A stud bolt loosening tool 1 is composed of a torque transmission member 2 screwed in the stud bolt attached on the work surface, and a fastening member 4 screwed in the stud bolt and fastened toward the torque transmission member 2. In the torque transmission member 2, a taper roller bearing 3 is assembled in a taper hole 222 ranging in a bolt axial direction. In the bolt axial direction of the fastening member 4, a bit fitting portion 411 is provided. While the fastening member 4 is fastened toward the torque transmission member 2 screwed in a stud bolt 100, if torque in a loosening direction is applied on the bit fitting portion 411 of the fastening member 4 through a bit tool Bt, the taper roller 31 rolls on a hole surface of the taper hole 215 of the torque transmission member 2 with rotations of the taper roller bearing 3, thereby loosening the fastening between the torque transmission member 2 and the fastening member 4.</p> |
