| 摘要 |
<p>PURPOSE:To make it possible to carry out the work on the ground and to improve work conditions by forming a C-shaped or an S-shaped guide path through combination of guide paths for upper and lower guide members and then carrying out the drawing work. CONSTITUTION:A first support 5 is secured by stretching pieces 25, 25 to the inside of a handhole H and then an upper guide member 4 is secured to the first support 5. When upper and lower guide members 4, 2 are oriented in same direction, contact part 28 of a second support 7 is brought into contact with the side wall face of the handhole H whereas when the upper and lower guide members 4, 2 are oriented in reverse directions, an auxiliary pipe 29 is employed as required. An intermediate member 3 previously connected with the lower guide member 2 is then coupled with thus positioned upper guide member 4.</p> |
