| 摘要 |
PROBLEM TO BE SOLVED: To sufficiently improve sealability especially at compression load.SOLUTION: An outer peripheral surface part to be a seal part on the side of a pin 3 is a convex surface 10 that is a rotation locus around a shaft of a convex arc 9, and a component inner peripheral surface part to be the seal part on the side of a box 1 is a composite curve surface 19 that is constituted by connecting a taper 15 positioned on a far shoulder part side and a convex surface 18 positioned on a near shoulder part side. A seal point SP is orientated in the taper 15, and a curvature radius Rb of a convex arc 17 of the convex surface 18 is larger than a curvature radius Rp of the convex arc 9 of the convex surface 10. |
