| 摘要 |
A pile press driver, wherein a composite sheave device is mounted on a leader suspended from a boom fitted to a crane carrying a winch; the composite sheave device is driven by the winch; the one side end portions of a plurality of output wire ropes fixed to the underside of the movable sheave block of said composite sheave device are turned upward by a plurality of reversion sheaves; when the movable sheave block is lifted through operation of the winch, the other side end portions of the output wire ropes connected to a pile through a pair of guide arms and a pile cap are brought down, thereby forcefully driving a pile into the ground.
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