| 摘要 |
PURPOSE: To effectively allow airtightness by providing each collar with one cylindrical center portion to be brought. into contact with a tubular body, and providing a tip surface having a circular hole. CONSTITUTION: The mutually fitted collar projections of individual basic bearing journals 1 are bearing collars 20 to 23 made of materials having high elongation limits. Further, the collar projections are slid on collars 23 to 25 having center portions 44 to 46 and in tip surfaces having hole portions 32 to 3 disposed in tip surfaces 26 to 31. Thus, airtightness is provided, and a gasket is reduced in size. |
