| 摘要 |
PROBLEM TO BE SOLVED: To provide a joined body which prevents generation of a crack and increases a fatigue strength.SOLUTION: A joined body 50 has a first component 51, a second component 52 which is so provided as to come in contact with the first component 51, and a joint part 55 which is provided at an end part of the first component 51. The joint part 55 is joined with an end surface 521 of the second component 52. When a plane, which is perpendicular to a line of intersection L50 between a first extension surface VP51 of an end surface 511 and the end surface 521 and passes a center C55 of the joint part 55, is so made as to be a virtual plane, an outer wall 56 of the joint part 55 is so formed that a cross-sectional shape on the virtual plane becomes a circular arc shape of a virtual circle VC5 having a radius R50 which is two times or less of a length t51 of the end surface 511 in a direction perpendicular to the end surface 521. Further, the outer wall 56 of the joint part 55 is so formed that an angle formed by a tangent line L51 contacting the cross-sectional shape on the virtual plane of the outer wall 56 on the end surface 521 and a sectional shape line L52 on the virtual plane of the end surface 521 is 90 degrees or more.SELECTED DRAWING: Figure 3 |
