| 摘要 |
<p>PROBLEM TO BE SOLVED: To economically manufacture a pipe member having high air-tightness and durability in mechanical stress. SOLUTION: In a pipe member having at least two annular bellows 1, 2, connection pipe 3 connecting these bellows to each other and cylindrical end part pipe joints 9, 10, the bellows 1, 2, connection pipe 3 and the cylindrical end part pipe joints 9, 10 are formed of a single member, in the connection pipe 3, its diameter and wall thickness correspond to the bellows 1, 2, and also an internal diameter thereof almost corresponds to a free internal diameter of the adjacent bellows, and relating to the connection pipe 3, a reinforcing pipe 11 is provided separately in an external diametric direction and concentrically, this reinforcing pipe 11 has an internal diameter corresponding to an external diameter of the bellows 1, 2, and also both end parts thereof are connected to a diametric direction outward wave top part of a first bellows pleat of the bellows 1, 2 continued to the connection pipe 3.</p> |
