Title:
PIPE REHABILITATION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/107457
Kind Code:
A1
Abstract:
In the present invention, a rehabilitated pipe is constructed within an existing pipe by connecting, in a circumferential direction and a pipe length direction, segments having side plates 102, 103 and a plurality of inner plates 106, 107 on the inside of both side plates.
A plastic nut retaining member 50, in which a nut 60 that threadedly engages with a connection bolt 11 is retained, is attached between the side plate 102 and the inner plate 106 adjacent thereto on one side of a segment 1b. The connection bolt is screwed into the nut, and segments 1a, 1b are connected in the pipe length direction as a result of tightening by such screwing. A groove is formed in the nut retaining member, and the nut is press-fitted into the groove so as to be retained by the nut retaining member.
Inventors:
KAMIYAMA TAKAO (JP)
ICHIDA MAKOTO (JP)
ICHIDA MAKOTO (JP)
Application Number:
PCT/JP2021/036030
Publication Date:
May 27, 2022
Filing Date:
September 30, 2021
Export Citation:
Assignee:
SHONAN GOSEI JUSHI SEISAKUSHO KK (JP)
International Classes:
F16L1/00; E21D11/20
Domestic Patent References:
| WO2016088168A1 | 2016-06-09 |
Foreign References:
| JP2011012803A | 2011-01-20 | |||
| JPH1068293A | 1998-03-10 | |||
| JPH0362213U | 1991-06-18 | |||
| KR20060023504A | 2006-03-14 | |||
| JP2009243531A | 2009-10-22 |
Attorney, Agent or Firm:
HAYAKAWA Yuzi et al. (JP)
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