| 摘要 |
PROBLEM TO BE SOLVED: To facilitate attaching/detaching operation of a cap without providing a screw part in a cap mounting structure with a sealing member mounted to detachably closing an opening of a container with the opening. SOLUTION: An opening 19 of a cylinder head cover 1 is provided with a cylindrical part 21 into which radially expansible engaging parts 9 protrusively provided at the tip side outer peripheral surface of an insertion part 5 of a cap 3 are inserted in close contact in a radially inward contracted state. In the mounted form of the cap 3 to the cylindrical part 21, the engaging parts 9 are locked in radially outward enlarged state to the deepest parts 23a of locking groove parts 23 provided on the inner peripheral surface of the cylindrical part 21, thus locking the engaging parts 9 to the cylindrical part 21. When turning the cap 3, the engaging parts 9 locked to the deepest parts 23a are contracted radially inward by guide parts 23b to take out the cap 3. COPYRIGHT: (C)2005,JPO&NCIPI
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