| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To obtain a feeding mechanism of a spiral support tool requiring a small footprint through which the laying work of a spiral support can be carried out by one person. <P>SOLUTION: The feeding mechanism of the spiral support tool is constituted of a portable base member 3 installed on the road surface 17, and a drum 5 attached removably to the base member 3 and winding a spiral support 7. The winding drum 5 is supported rotatably in two modes of first rotational movement (a) rotating about the axis XL of the winding drum 5 which is a level on the road surface 17, and second rotational movement (b) where the entire drum rotates about the orthogonal drum axis XF traversing the center of the drum axis XL in the horizontal direction along the drum axis so that the spiral support 7 can be drawn out smoothly by the first rotational movement (a). The winding drum 5 is also rotated by the second rotational movement (b) in the direction for releasing the torsional spring pressure in the rotational direction of a spiral groove. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
