| 摘要 |
PROBLEM TO BE SOLVED: To provide a press-in pile driver which is not inclined when pressing in, small and lightweight and high in working efficiency. SOLUTION: A main hydraulic pressure cylinder 6 connecting a chuck device 5 chucking a press-in pile into the underground and a pile press-in body 4 and vertically moving the chuck device 5 to press-in is provided, and arranged in the pile press-in machine body 4 side than the central line L of a pile that the hydraulic pressure cylinder 6 is held by the chuck device 5, the beam member 7b is extended from the clamp 2 fixing the pile press-in machine body 4 to the existing pile 20, and can be detached from the beam member 7b and the chuck device 5 an auxiliary hydraulic pressure cylinder 8 connecting the beam member 7b and the chuck device 5 is provided, and the main hydraulic pressure 6 and the auxiliary hydraulic pressure cylinder 8 are driven concurrently. COPYRIGHT: (C)2005,JPO&NCIPI
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