Title:
GUIDE FOR PULLING IN INNER PIPE
Document Type and Number:
Japanese Patent JP3241926
Kind Code:
B2
Abstract:
PURPOSE: To prevent the increase in the frictional resistance and the rolling phenomenon in a propulsive steel pipe when a bundle of inner pipes is pulled in.
CONSTITUTION: A rotary tool 5 to reduce the frictional resistance with the inner wall of a propulsive steel pipe is arranged on the circumferential surface side of a body 4 whose diameter is slightly smaller than the diameter of a protective pipe (the propulsive pipe 3), and a rope 7 for fraction is connected to the center of the forward flat surface part of the body through a forward body 8 of revolution. A guide rope 13 is connected to the center of the rear flat surface part of the body 4 through a rear body 11 of revolution. The deviation of the tracting direction from the pipe axis of the advancing steel pipe is reduced. This constitution prevents the uneven tracting force from being applied to the bundle 2 of inner pipes, and prevents the increase in the frictional resistance and the rolling phenomenon in pulling in the bundle 2 of the inner pipes.
Inventors:
Haruhiko Katsuki
Masanori Asabuki
Masanori Asabuki
Application Number:
JP8036194A
Publication Date:
December 25, 2001
Filing Date:
April 19, 1994
Export Citation:
Assignee:
Nippon Comsys Co., Ltd.
International Classes:
E21D9/06; B65H57/00; F16L1/00; F16L55/00; H02G1/06; (IPC1-7): F16L1/00; B65H57/00; E21D9/06; F16L55/00; H02G1/06
Domestic Patent References:
| JP49119928A | ||||
| JP5698314A | ||||
| JP6342464A |
Attorney, Agent or Firm:
Akihide Sugimura (5 outside)