Title:
AUGER BIT AND CONNECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2024/106300
Kind Code:
A1
Abstract:
[Problem] To provide an auger bit and a connection method making it possible to remove more soil and to improve work efficiency. [Solution] This invention comprises: an advance thrusting step ST1 for loosening the ground G at a connection location of a branch pipe 37; a guide pipe thrusting step ST2 for inserting a cylindrical guide pipe 31 toward a main pipe 34 that is buried in the ground; an advance thrusting step ST3 for using an auger bit 1 to excavate inside the guide pipe 31 toward the main pipe 34; a main pipe boring step ST4 for forming an attachment opening 36 for the branch pipe 37 in the main pipe 34; a branch pipe connecting step ST5 for attaching the branch pipe 37 to the attachment opening 36; and a guide pipe pull-out and removal step ST6 for pulling out and removing the guide pipe 31. The auger bit 1 is provided with: a guide member 5 for guiding sediment S from a distal end 3 toward a proximal end 2; and a blocking member 10 for blocking backsliding of the sediment S being guided by the guide member 5. The guide member 5 is provided inclined along a peripheral surface of a shaft 4. The blocking member 10 is pivotally supported so as to freely rotate on the proximal end 2 side of the guide member 5.
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Inventors:
YAMAZAKI HIROFUMI (JP)
Application Number:
PCT/JP2023/040366
Publication Date:
May 23, 2024
Filing Date:
November 09, 2023
Export Citation:
Assignee:
SAIKOU GIKEN LTD PRIVATE COMPANY (JP)
International Classes:
E02D5/28; E02D5/56; E21B7/00
Foreign References:
| JP4881257B2 | 2012-02-22 | |||
| JPS5370701U | 1978-06-14 | |||
| JP2009050818A | 2009-03-12 | |||
| JP2021032030A | 2021-03-01 |
Attorney, Agent or Firm:
SUZUKI, Yasuhiro (JP)
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