| 摘要 |
PROBLEM TO BE SOLVED: To provide a synthetic resin manhole joint which can be reinforced by employing a simple structure, and can control its deformation even if a cavity is formed at a bottom thereof at the time of backfilling. SOLUTION: The manhole joint 11 has an insertion portion 15 which is formed on one end of a cylindrical joint main body 12 so as to be inserted into and connected to a joint port 14 formed in a manhole 13, and a receiving port 17 which is formed on the other end of the joint main body 12 so as to serve as a pipe connection portion. The manhole joint has a reinforcing ring 18 mounted on an outer periphery of the joint main body 12. The reinforcing ring 18 is formed of the same material as that of the joint body 12, and has an inner diameter slightly larger than the outer diameter of the joint body 12. COPYRIGHT: (C)2006,JPO&NCIPI
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