| 摘要 |
PROBLEM TO BE SOLVED: To seal a portion required to be sealed inside a cover body by mounting once by integrating an outer frame with an inner frame, and integrating the outer frame and inner frame with a gasket formed by an elastic body. SOLUTION: An inner frame 1b is provided on the inside of an outer frame 1a, and the outer frame 1a and the inner frame 1b are integrated with each other by a bar-like body 1c. A gasket 2a formed by an elastic body is secured to the side of the outer frame 1a, a gasket 2b is secured to the side of the inner frame 1b, and the respective gaskets 2a and 2b are integrated with the outer frame 1a and the inner frame 1b. Thus, a portion required to be sealed inside the cover body can be sealed by mounting once, and even if the frame is manufactured by synthetic resin, the total thickness of the gaskets 2a, 2b can be kept from being increased to reduce the weight.
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