| 摘要 |
PROBLEM TO BE SOLVED: To provide a connecting fitting preventing rattling or undesired connection release upon the action of an impact or internal negative pressure.SOLUTION: Each front end surface of a fitting protrusion 8 and back wall surface of a fitting recess 7 on the other side of a pair of bodies are cam surfaces 30, 31 inclined to urge those bodies in an axially and mutually separating direction when the bodies are relatively rotated mutually in a hook part engaging direction, that are contacted with each other during engagement of engagement surfaces 9a of hook parts 9 and regulate mutual approximation of the bodies in the axial direction. The cam surfaces of the front end surfaces are inclined toward their roots of the fitting protrusions as they go from the end on the side surface 8a side without the hook part to the end on the protruded end side of the hook part in their fitting protrusions. The engagement surfaces are inclined as in the cam surfaces, and the inclination angles b of the cam surfaces relative to the circumferential direction are mutually the same and larger than the inclination angles a of the engagement surfaces. |
