| 摘要 |
<p>PURPOSE: To allow detection to be done surely by indicating through lighting the underground buried matter detection signal of a detection sensor set on the tip end of a rod extended from a boring machine main body. CONSTITUTION: The detection sensor 3 of an underground buried matter is formed at the tip end of a rod 2 extended from a boring machine main body 1. In the next place, a screen 4 is provided toward the direction of the base of the rod 2 so as to indicate the detection signal through lighting at a predetermined position C. Then, an image pick up device 6 is put at the main body 1 side in order to allow the screen 4 to image pick up; which subsequently is directed to an indication device 8 to be indicated as an image 7. In addition, there are provided with shift detection means 12a, 12b, 13a, 13b at the tip end A of the rod 2 so that relative shift is detected in the direction and rotational direction of the support shaft 10 of a bit 9, thereby preventing the underground buried matter from being broken by being indicated through lighting at the predetermined position C.</p> |
