| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an expansion joint capable of preventing bellows from being damaged over a long term even if internal pressure repeatedly changes made. <P>SOLUTION: A bellows 41 of an expansion joint 31, of the whole comprises a fluorocarbon resin layer placed at the inside in the radial direction and a glass fabric layer placed at the outside in the radial direction, includes a pair of sections-to-be fixed 51 and a bellows body section 53 formed so as to expose between them. Furthermore, the bellows body section includes a pair of base sections 55 and a tube-shape swelling section 57 which is placed between them, swells out of a virtual surface with a curvature that includes the pair of base sections and swells in an arc shape. Threads of the glass fabric layer have density that warps and wefts are respectively in the range of 6 to 10 and set in an area of 25 millimeters square, and such a fiber direction that each of warps and wefts slant relative to the axial center of the bellows. <P>COPYRIGHT: (C)2004,JPO</p> |
