Title:
UNDERGROUND PIPE, JOINT MEMBER, COUPLING STRUCTURE FOR UNDERGROUND PIPE, AND METHOD FOR INSTALLING UNDERGROUND PIPE
Document Type and Number:
WIPO Patent Application WO/2024/042622
Kind Code:
A1
Abstract:
An underground pipe 11 comprises a plurality of inner pipes 11 that each have a hollow portion 111 capable of housing a cable 9, an outer pipe 12 that houses the plurality of inner pipes 11 and has an inner surface T2 having portions which are in contact with the respective outer surfaces T1 of the plurality of inner pipes 11, and a protective member 13 that is provided in spaces demarcated by the outer surfaces T1 of the plurality of inner pipes 11 and the inner surface T2 of the outer pipe 12. The strength of the protective member 13 is higher than that of the plurality of inner pipes 11 and the outer pipe 12.
Inventors:
NISHIYAMA DAISAKU (JP)
ISHIKAWA TAKUYA (JP)
TAMAMATSU JUNICHIRO (JP)
ITASAKA KOJI (JP)
IZUMI TOSHIMITSU (JP)
ISHIKAWA TAKUYA (JP)
TAMAMATSU JUNICHIRO (JP)
ITASAKA KOJI (JP)
IZUMI TOSHIMITSU (JP)
Application Number:
PCT/JP2022/031774
Publication Date:
February 29, 2024
Filing Date:
August 23, 2022
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H02G9/06
Domestic Patent References:
| WO2022074770A1 | 2022-04-14 |
Foreign References:
| JP2005039871A | 2005-02-10 | |||
| JP2008245341A | 2008-10-09 | |||
| JPH09130951A | 1997-05-16 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
Download PDF: