| 摘要 |
<p>PROBLEM TO BE SOLVED: To bend a hose with clearance without the tearing or the like, by setting the first pitch between the crests or the valleys positioned inside of a bent part at least bent, larger than the second pitch between the crests or the valleys positioned outside of the bent part. SOLUTION: The first bellows part 5 has the shape of bellows having the crests 5A and the valleys 5B, and is bendable. The size of the first pitch 5P between the crests 5A, 5A or the valleys 5B, 5B positioned inside the bent part 5S of the first bellows part 5, is set to be almost two times as large as that of the second pitch 5Q between the crests 5A, 5A or the valleys 5B, 5B positioned outside of the bent part. Accordingly in the bending of the bent part 5S, the inside part 51 of the bent part can be contracted with the clearance, and the outside 5H of the bent part can be expanded with the clearance.</p> |
