TUBE INSERTING JIG AND TUBE INSERTING METHOD USING IT

摘要

PROBLEM TO BE SOLVED: To make it possible to lay another inner tube in a duct when there is an inner tube laid already in the duct, without mingling it with the existing one. SOLUTION: A tube inserting jig 11 having rollers 17 fitted symmetrically to both sides of a connecting member 13 arranged with its central axis directed toward the direction of a duct, and having a push rod 27 and a pulling material or an inner tube connecting unit on both sides of the connecting member 13, is used. Since the tube insertng jig 11 does not get under an existing inner tube at the time of running in a duct, the new inner tube does not mingle with the existing inner tube.