ROTARY DRIVING AND CONTROL METHOD IN HYDRAULIC VIBRATARY PILE DRIVER AND ROTARY DRIVING AND CONTROL MECHANISM IN THE DEVICE

摘要

PURPOSE: To drive a steel sheet pile of a corner part safely, with high efficiency and at low cost by turning a pile chuck in a hydraulic vibratary pile driver at an arbitrary desired angle on a vertical shaft Z by remote operation without the need of a heavy object moving work by human power. ;CONSTITUTION: A multi-groove screw rod 14 is fitted to the cylinder bottom 10b of a double acting hydraulic cylinder 10, and a nut member 16 is fixed to a piston 10d. When the piston 10d is moved up and down, it is forced to reciprocate by the screw action. The rotation is transmitted to a piston rod 3d of a vibration exciting unit through a spline shaft 20 and a spline nut 21. A pile chuck is fitted to the piston rod.;COPYRIGHT: (C)1996,JPO