PILE DRIVER USING PERCUSSION DEVICE AND BEARING MECHANISM FOR BEARING PERCUSSION DEVICE IN PILE DRIVER

摘要

PURPOSE: To promote safety and work efficiency by bearing a forcing body on a bracket slidable in the vertical direction on a strut, and changing the turning operation force of a control arm to a truck into the reciprocating motion in an axial direction of the strut of the forcing body. ;CONSTITUTION: A strut 7 is erected on a truck 6, and B forcing body 17 is provided downward from a bracket 8 slid and borne on a strut 7 so that it is capable of sliding up and down. The force turning a control arm 9 downward is converted into the force lifting the forcing body 17 upward. After that, in the case of work, the truck 6 is moved to place the axial center of a percussion tool 21 right above a driving point of a pile A. Then, the control arm 9 is turned downward, and the forcing body 17 is moved upward to lift the bracket 8 up to a specific height. Successively, the control arm 9 is returned upward, and a cap section 1b is fitted to the top of the pile A to start an engine 20. Successively, the top of the pile A is straightly struck repeatedly and continuously through the percussion tool 21 by up and down reciprocating drive of a movable cylinder and a percussion bar of a free piston.;COPYRIGHT: (C)1993,JPO&Japio