| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve a bending property by making a part extending in the major axial direction larger than a part extending in the minor axial direction, in a distance of a height direction between crest part and a trough part of a bellows part, in a hollow body such as an inlet which is arranged in a shape of a long elliptic or an elliptic cross section, and which is provided with the bellows part on the midway of the longitudinal direction. SOLUTION: A hollow body such as an inlet or an air duct connected to an air cleaner, especially, an inlet 1 mounted on a body of automobile, is provided with a fresh air inlet port 2 on one end, and is provided with a fitting part 3 fitted to the air cleaner on the other end, and which is provided with a bellows part 4 in an intermediate part. The inlet 1 and the bellows part 4 are made of a resin, and for example, it is formed of an elastomer. In this case, in the bellows part 4, a distance H between an outer surface of a crest part 4a and an outer surface of a trough part 4b is set in such a way that a part extending in the major axial direction of a bellows part cross section is formed larger than a part extending in the minor axial direction, preferably, the distance H is gradually heightened as coming nearer to a center 8 of the major axial direction.</p> |
