| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a gasket for a tightening part of a screw member, which makes sealing performance proper. <P>SOLUTION: The gasket for the tightening part of the screw member includes: a screw hole member which comprises a screw hole and which has an outward diameter-enlarged conical surface provided at the opening end of the screw hole; the screw member which comprises a head and a shank elongated from the side of one end surface of the head and which has an outer peripheral surface of the shank provided with an outer peripheral surface having no screw from the head side and a screw part having a screw from the side of one end of the outer peripheral surface; and the gasket which is arranged in an annular space surrounded by the conical surface, the outer peripheral surface and one end surface of the head when the screw member is tightened into the screw hole. The gasket includes an approximately trapezoidal cross-section body part which comprises a cylindrical inner peripheral surface brought into contact with the outer peripheral surface and a conical outer peripheral surface almost parallel to the conical surface, and an annular lip-like protrusion protruding radially outward from the conical outer peripheral surface of the body part. <P>COPYRIGHT: (C)2013,JPO&INPIT |
