| 摘要 |
<p>PURPOSE:To correctly detect the positions of stop cocks after lining and surely bore opening sections respectively by fitting the stop cocks arranged with markers having different resonance signal frequencies to branch pipe opening sections. CONSTITUTION:When an obsolete pipe buried under the ground is lined, positions of branch pipes must be correctly grasped for boring. Stop cocks 1 buried with position detecting markers 14 are fitted to opening sections of branch pipes A before lining, and different resonance frequencies are used for the markers if multiple branch pipes are used. A position detecting and boring robot 18 is run in a reclaimed pipe B thus installed. The robot correctly detects the positions of the markers fitted in advance with a loop antenna 23, a boring cutter 26 is rotated, and the branch pipe sections are bored in sequence. The positions of the opening sections can be correctly detected and surely bored even if they are located near to each other.</p> |
