| 摘要 |
PROBLEM TO BE SOLVED: To provide a reinforcement member of a tightening part which is simple In assembly and capable of being automatically held to an opening part in a casing. SOLUTION: A tightening reinforcement part is provided with an opening 5 in a casing to receive a tightening member, a cylindrical opening part 6 which is arranged at an inlet of the opening 5 in an approximately concentric manner with the opening, and a reinforcement member 1 provided with an area 8 corresponding to the cylindrical opening part, and the area 8 is constituted as a truncated conical part. The shorter diameter D1 on the outer side of the truncated conical part is shorter than or equal to the inner diameter of the cylindrical opening part 6, and the longer diameter D2 on the outer side of the truncated conical part is of dimension exceeding the inner diameter of the cylindrical opening part 6, and the exceeding dimension is selected to be the value to be canceled by the elastic deformation of the reinforcement member 1. |
