| 摘要 |
<p>PROBLEM TO BE SOLVED: To increase the allowable length up to rupture by forming a bellows both ends of which are connected to first and second exhaust pipes so that the section extending from a mountain to a valley has a sine curve-like waveform part and a waveform part having a maximum mountain width larger than the space between valleys. SOLUTION: A bellows 3 constituting a part of a flexible tube A1 is constituted into an integrated matter by welding a compression-side super-deformed bellows part 30 having a waveform part 3a formed so that the section extending from a mountain 3a' to a valley 3a" has a sine curve form to a tension-side super-deformed bellows part 300 having a waveform part 3a having circular mountain 3b' and valley 3b" formed so that the space between the valleys 3b" is smaller than the maximum width of the mountain 3b'. Coil springs 6', 6" are interposed between protectors 7', 7" fixed to the free end part side of an outer cover 5 and the other end part of the bellows 3 on the same axis as the outer cover for covering the circumference of the bellows 3.</p> |
