RENEWING METHOD OF PIPE LINE AND RECIPROCATORY DRIVING DEVICE OF POLISHING MEMBER USED FOR THIS RENEWING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a renewing method of a pipe line, which includes a burr removing process of efficiently removing burrs on a corner part of the inside of a bent part of an existing piping, and also to provide a reciprocatory driving device of a polishing member used for this renewing method. SOLUTION: This renewing method of the pipe line comprises: the burr removing process to polish and remove the burrs on the corner part of the inside of the bent part by a polishing part by reciprocating the polishing member along the existing pipe line in a state of pressing the polishing part on the corner part of the inside of the bent part while maintaining a strained state of the polishing member by arranging the polishing part on the corner part of the inside of the bent part after inserting the polishing member furnished with the polishing part in the existing pipe line; and a process to insert a synthetic resin pipe for renewing in the existing pipe line finished with removal of the burrs. The corner part of the inside of the bent part is polished so that polishing width of the corner part of the inside of the bent part in an after-process becomes wider in comparison with polishing width in a pre-process by using the polishing parts different in size while practicing the burr removing process a plural number of times. COPYRIGHT: (C)2008,JPO&INPIT