| 摘要 |
PURPOSE:To improve the sealing property and prevent a bolt from being missed out by forming a taper section inside an insertion hole and inserting a coupling member here in the said structure of a vehicle or the like for traveling on the irregular ground. CONSTITUTION:A case main body 18 made of resin and a case cap 19 likewise made of resin are removably fitted to an air cleaner box, and an element is arranged in it. A projection 18a is provided on the periphery of the upper opening of the case main body 18, and a cylindrical support section 18b is protruded on the inner face. A recess 19b into which the projection 18a is to be inserted is provided on the periphery 19a of the lower opening of the case cap 19. A bolt insertion section 22 is formed at the portion facing the support section 18b, and a bolt 26 is inserted into its insertion hole 22a. A taper section 22b is formed at the lower end section of the insertion hole 22a, and an O-ring 27 is fitted to the bolt 26. When the bolt 26 and a nut 21 are screw-connected, they are reliably sealed by the O-ring 27.
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