| 摘要 |
PURPOSE:To freely set the dismounting position of a cable by searching an electromagnetic field generated by supplying a current to leads to detect the central position of a buried tube material from above the surface of a slab, and forming a drawing hole passed to the material by an opening tool with the detected position as a center. CONSTITUTION:A body 2 is regulated in a predetermined height via a regulating bolt 8 and supporting fittings, and mounted on a floor 11. In this case, a lead 3 is disposed at its lower side. Then, concrete is placed on the floor 11 to form a slab 10, and a tube material 1 is buried. Thereafter, when a cable C for wires, signal wires, etc., is wired in the material 1 buried in the slab 10, an electromagnetic field is generated by supplying a current to the leads 3, the generated field is searched by a searching unit, and the central position of the material 1 is detected from above the slab 10. Then, a center drill 5a of a hole saw 5 is matched to the detected position at the drawing position of the cable C to open a hole, and a drawing hole 6 is formed from the surface of the slab 10 to the upper surface of the body 2, and opening fittings is fastened to the hole 6. |
