| 摘要 |
PROBLEM TO BE SOLVED: To easily manufacture a flexible joint at a low cost and to reduce reaction when decentered so as to increase eccentricity absorbing action while having a bias reinforced rubber hose part by forming a rigid body in a rubber hose part as a single or a plurality of cylindrical rigid bodies arranged inside a fiber reinforced layer. SOLUTION: A rubber hose part 18 is formed of a fiber reinforced layer 16 with fibers arranged bias, and a cylindrical rigid body 15 which is an external pressure reinforcing rigid body, arranged inside. An inner surface rubber layer 12 is formed inside the fiber reinforced layer 16 or the cylindrical rigid body 15, and an outer surface rubber layer 13 is formed outside thereof. Piping connecting members 17 are provided with flange parts 19 for connecting object buried piping or the like, and nipples 21 are jointed thereto by welding or the like. The ratio (length/radius or the like) of the length of the cylindrical rigid body 15 to the distance from the center (a radius in the case of a cylinder) is preferably in a range of 0.1-3, and the ratio (length/thickness) of the length of the cylindrical rigid body 15 to its thickness is preferably in a range of 5-15.
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