| 摘要 |
PROBLEM TO BE SOLVED: To provide a metallic wire joining structure which improves fatigue durability between a wire and a member to be caught which is fixed to the wire.SOLUTION: A metallic wire joining structure includes a wire 1 and a first cylindrical member 3' and a second cylindrical member 4' inserted by the wire while being adjacent to each other with respect to the wire 1, when the hardness of the wire 1 is HO, the hardness of the first cylindrical member 3' is H1 and the hardness of a second cylindrical member 4' is H2, the relation of H1<HO≤H2 holds and the first cylindrical member 3' is arranged on the side of receiving a repeated load from the wire 1. Further, both cylindrical members 3', 4' are plastically deformed by a caulking die 11 to form a first member 3 to be caught and a second member 4 to be caught. Then, the first cylindrical member 3' is subjected to caulking joining in a soft state and the second member 4 to be caught is subjected to caulking joining in a hard state. |
