| 摘要 |
PURPOSE:To easily draw out a core material even in a narrow site by using an exclusive drawing jack mechanism to be set between adjacent core materials. CONSTITUTION:An auxiliary metal tool 17 is attached to a sheathing core material 10-a, and a base body 9 forming a drawing mechanism is attached to the heads of core materials 10-b and 10-c adjacent to the core material 10-a. Then, a plow body 1 is attached to the base body 9 and the auxiliary metal tool 17 is chucked. Cylinders 8 are extended, the core material 10-a is drawn out to a height at which chucking is possible, the chucking is released, and then the auxiliary metal tool 17 is taken out. Then, the cylinders 8 are shrunk to lower the plow body 1, the core material 10-a is again chucked, and then the cylinders are extended to draw out the core material 10-a. These processes are repeated, and the core material 10-a is completely drawn out and removed by a crane. |
