To provide a clean out structure of a piping capable of improving a fastening force of a cap to the clean out and preventing sewage from blowing out from the clean out during cleaning work and reducing the labour of cleaning work to the minimum.
In the clean out structure S1 of a piping 5, a plurality of bolts 11 are used and a cap 18 is co-fitted to the outer periphery of the clean out 6 and a cover body 14 is disposed to the clean out 6 to cover the insertion part 19 of the cap 18. The insertion part 19 is provided with the cover 20 sealing the outer peripheral face of cleaning tool to be inserted. The cover body 14 is provided with through holes 15, 16 allowing a plurality of bolts 11 to penetrate in. When all bolts 11 are unfixed, so as to disclose the insertion inlet 19 of the cap 18, the cover body 14 is made turnable around the center of the bolt 11, other through holes 16 except the through hole 15 of the rotary center are opened to the outer periphery of the cover body 14 along the rotary direction.
KOJIMA SEIZO
KAKO YOZO
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