Title:
PERFORATION DEVICE AND PERFORATION METHOD
Document Type and Number:
WIPO Patent Application WO/2016/163191
Kind Code:
A1
Abstract:
Prior to lining a main pipe, a marker configured as a receiver coil (33) is set at the center (12b) of a branch pipe opening or a position separated a prescribed distance (S) from said center. On an intra-pipe robot (20), a rotatable perforating blade (31) for perforating main pipe lining material (13) that is blocking the branch pipe opening and a transmission coil (40) for detecting the position of the marker are installed coaxially or separated by the prescribed distance (S). After the main pipe is lined, the perforating blade is moved in conjunction with the transmission coil in the longitudinal direction of the main pipe and in the circumferential direction of the main pipe to perforate the main pipe lining material at the position at which the electromagnetic bonding of the two coils is maximal. Since the center of rotation of the perforating blade coincides with the center of the branch pipe opening at the position at which the electromagnetic bonding of the two coils is maximal, it is possible to perforate the main pipe lining material accurately to coincide with the branch pipe opening.
Inventors:
ITOH TAKAHIKO (JP)
KAMIYAMA TAKAO (JP)
KONNO AKIRA (JP)
KAMIYAMA TAKAO (JP)
KONNO AKIRA (JP)
Application Number:
PCT/JP2016/057002
Publication Date:
October 13, 2016
Filing Date:
March 07, 2016
Export Citation:
Assignee:
SHONAN GOSEI-JUSHI SEISAKUSHO K K (JP)
International Classes:
B26F1/16; B26F1/00; F16L1/028; F16L41/04; G01B7/00
Foreign References:
| JPH01240207A | 1989-09-25 | |||
| JPH0254089A | 1990-02-23 |
Attorney, Agent or Firm:
HAYAKAWA, Yuzi et al. (JP)
Yuji Hayakawa (JP)
Yuji Hayakawa (JP)
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