| 摘要 |
PROBLEM TO BE SOLVED: To provide a grommet which has satisfactory sealability without using a filler.SOLUTION: In a grommet 16, a cylindrical part 17 and a flange part 18 are integrally formed by using an elastic material such as a silicon rubber, and the cylindrical part has a cylindrical shape of a circular cylinder or the like and has a bellows shape inside of the flange part. In the cylindrical part, a hollow 21 is provided which can be expanded radially inside by pressurization, and formed so as to perform pressurization and evacuation by injecting a gas or a liquid via an injection port. The flange part is provided in the vicinity of at least one end 24 of the cylindrical part in an axial direction and on an axially outer surface S, a groove is provided that extends in a circumferential direction of the cylindrical part.SELECTED DRAWING: Figure 3 |
