| 摘要 |
PROBLEM TO BE SOLVED: To improve pressure tightness and a positioning accuracy of each seal part by reducing pressure caused by sealing fluid toward a lip which is fit to an inner circumferential side of a lip holder provided with a second sealing member and which is brought into slidably contact with a shaft by the lip holder fixed to a sealing fluid side of a washer. SOLUTION: A fluorine contained rubber lip seal 6 as a second sealing member is provided with a fitted-in part 61 which is fitted to a fitting-in part 51 arranged on an inner circumferential side of a back-up lip holder 5, and a lip 62 which slidably abuts on a rod, and is covered with the back-up lip holder 5, and thereby, it is possible to prevent pressure by a fluid as oil of a sealing fluid side O from receiving directly. A load toward the lip 62 is reduced, and proper function is carried out even if pressure by the sealing fluid is high. It is thus possible to correctly decide a positioning relation of each sealing part, respective lips are positioned with good accuracy, and it is also possible to improve workability to more extent. |
