| 摘要 |
<p>In order to strongly fix a resin second lip-type seal member, which is assembled in the inner circumference of a retaining ring together with a back-up ring and a first lip-type seal member having rubber-like elasticity, a fixing structure is provided in the second lip-type seal member and the back-up ring such that a projection provided on the back-up ring bites into the second lip-type seal member by means of a caulking load and engages. Furthermore, a second fixing structure is provided on the back-up ring and the retaining ring such that part of the circumference of a circular caulking section is forced into an incision provided in the back-up ring by means of a caulking load, and engages.</p> |
