Drainage joint unit, drainage joint structure equipped with the drainage joint unit, and drainage pipe repair method

摘要

Disclosed is a drainage joint unit or the like that can appropriately repair or repair the drainage pipe side in a state where a part of the existing drainage pipe is left on the floor slab. A drainage joint unit 10 for connecting a dredge trap T and a new drainage pipe NP in a state where the dredge trap T and a cutting short pipe OPa connected thereto are left on the floor slab S. A joint pipe 11 inserted into the pipe OPa and having an upper end joined to the heel trap T, a joint pipe 11 is supported, a bottom plate ring 12 facing the lower end surface of the cutting short pipe OPa, and a bottom plate ring 12 supported The covering sleeve 13 that covers the cutting short tube OPa and the fixing plate 14 that supports the covering sleeve 13 and is fixed to the lower surface Sa of the floor slab S are provided. [Selection] Figure 1