| 摘要 |
PROBLEM TO BE SOLVED: To provide an existing pile drawing device which is simple in structure and has hoisting claws arranged on a casing thereof, for engaging with a lower edge of the existing pile, wherein the existing pile drawing device dispenses with a device, such as a hydraulic cylinder, for operating the hoisting claws from the outside. SOLUTION: The existing pile drawing device 1 has the cylindrical casing 5 having an inner diameter larger than a maximum outer diameter of the existing pile P driven for rotation upon connection to a piling machine 2, and the casing is driven into the ground so as to enclose the existing pile P, followed by engaging the hoisting claws 10 arranged on a lower edge of the casing 5 with the lower edge of the existing pile P, to thereby draw the existing pile P together with the casing 5. According to the existing pile drawing device, the plurality of hoisting claws 10 are pivotally arranged on an inner peripheral portion of the lower edge of the casing 5 so as to protrude inward to engage with the lower edge of the existing pile P at the time of drawing the casing 5 upward. COPYRIGHT: (C)2005,JPO&NCIPI
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