BURIED PIPE BRANCH PART BORING DEVICE

摘要

PROBLEM TO BE SOLVED: To stably bore a lining of a buried pipe branch part at high speed from the inside of a buried pipe even if the buried pipe has a small bore in a buried pipe branch part boring device. SOLUTION: The buried pipe branch part boring device bores the lining of a piping branch part of the buried pipe from the inside of the buried pipe. The boring device is provided with a machining mechanism 10 for boring the lining of the piping branch part; a turning mechanism for rotating the machining mechanism 10 around a piping axis; and a moving mechanism for moving the machining mechanism 10 and the turning mechanism in an axial direction of piping. Universal joints 50 are provided among the machining mechanism 10, the turning mechanism and the moving mechanism. The machining mechanism 10 is provided with a rotary boring tool 200 projected in the radial direction of piping; a tool lifting mechanism 240 for moving the boring tool 200 in the radial direction of piping; and a tool driving motor 210. The boring tool 200 and the tool driving motor 210 are connected through a universal shaft 220 provided with universal joints 221 at both ends and having the degree of freedom of passively extending in the axial direction. COPYRIGHT: (C)2006,JPO&NCIPI