| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and structure for tightening a taper piece with a good workability and a female screw to a mother material. SOLUTION: This taper piece 1 is provided with a taper part 101 whose outside surface is a truncated cone shape, a brim part 102 formed by projecting for the taper part 101 on the final end of the expansion side of this taper part 101 and also having a plane orthogonally crossing to the axial direction of the taper part 101 and a female screw 104 formed on the center axis of the taper part 101. A tightening structure is made by striking the taper piece 1 in the hole 3 processed simultaneously the hole taper part 301 and a hole step part 302. |
