To provide a pipe joint for an inner auxiliary pipe securing a space for work or the like inside a manhole by minimizing projection into the manhole, and allowing easy attachment/detachment of a cover body for a cleaning port and easy and firm locking of the cover body.
This pipe joint 1 for the inner auxiliary pipe is constituted to have a socket 2 for an inflow pipe at one end of a horizontal pipe body 3 and the cleaning port 4 at the other end, to form a connection port 6 for the inner auxiliary pipe at the end of a pipe body 5 extending downward, and to provide through holes 8 in positions, facing a diameter enlarged opening peripheral edge part 7, of the cleaning port 4 to lock the cover body 10 insert-fitted into the cleaning port 4, using a fixing bar 9 on the surface of the cover body 10.
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Naotaka Kono
Eiichiro Shimazaki