| 摘要 |
PURPOSE:To improve a working property without entailing any damage to sealability in a cylindrical mounting part by forming a ring projection formed on an outer circumferential surface of the cylindrical mounting part of a bellows and a ring recess in a part corresponding to this ring projection on the inner circumferential surface, respectively. CONSTITUTION:A ring projection 5 is formed in a cavity part 4 of a cylindrical mounting part 3 of a bellows, and a ring recess 6 is formed in a part corresponding to the ring projection 5. Consequently, there is no projection at all on the inner circumferential surface of the cylindrical mounting part 3, and that the ring recess 6 is formed over the whole circumference, so that when the cylindrical mounting part 3 is inserted into an installing part 8 of the bellows, the ring recess 6 is opened, thus insertion is smoothed enough. After the insertion, a flat belt is rolled in the cavity, and when it is tightened, almost the whole surface of the cylindrical mounting part 3 is uniformly clamped, while the ring projection 5 is extruded in direction being projected to the side of the ring recess 6 on the inner circumferential surface, thus high sealability to the bellows installing part 8 of the cylindrical mounting part 3 can be well held. |
