| 摘要 |
PURPOSE:To obtain a cap structure for preventing oil dropping when the cap is taken off by forming a side wall extending from an upper surface in a back direction of a cover, on the circumference rim of an inlet and providing a sealing member covering continuously the circumference part upper surface and the side wall. CONSTITUTION:The longitudinal direction of a plate spring 39 is positioned on the elliptic side of an inlet 2 by means of a cap 3 provided with a seal member 21 mounted thereon to push the cap 3 into the inlet 2. At this time, the lip part 27 of the projection part 25 for supporting of a sealing member 21 is elastically on a side wall 5 to provide sealing between the projection part 25 for supporting and the side wall 5, while the lip part 27 of a collar part 23 is fit elastically on the circumference rim part upper surface of the inlet 2 to provide sealing between the collar part 23 and the circumference rim part upper surface. The sealing member 21 is provided by such a structure as a cross section is formed in GAMMA shape and the circumference rim part upper surface 4 of the inlet 2 and the side wall 5 are covered. It is thus possible to prevent dropping of oil when the cap 3 is opened, since there is no space where oil is reserved, even if a vehicle or the like is inclined, so that oil infiltrates in circumference. |
