| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a structure for hardly causing leakage via a bolt hole by making a sealing fluid flowing out of a blow hole unreachable to the bolt hole, even if the blow hole of straddling a bead line inside of a gasket is generated in a flange being the mating side of installation. <P>SOLUTION: In this seal bead structure of the gasket, an inter-bolt bead arranged between two bolt holes in the metallic gasket and bolt just-under beads arranged around the respective bolt holes, are continuously arranged. The inter-bolt bead is constituted of a trapezoidal bead of a cross-sectional trapezoidal shape or a full bead of a cross-sectional circular arc shape, and the bolt just-under bead is constituted of a combination of an inside half bead of surrounding the inside of the bolt hole and an outside half bead of surrounding the outside of the bolt hole. The bolt just-under bead is integrally provided with a two-stage half bead for exhibiting whole peripheral sealability by surrounding the periphery of the bolt hole over the whole periphery. <P>COPYRIGHT: (C)2013,JPO&INPIT |
