MULTIFUNCTIONAL WORKING DEVICE FOR CONSTRUCTING FOREST ROAD

摘要

PROBLEM TO BE SOLVED: To provide a multifunctional working device performing various types of work in a narrow place at site where a forest road is constructed. SOLUTION: A work arm connected with a tip of a boom of a heavy machine is composed of a rear part arm and a front part arm divided through a rotary driving unit. Work attachment composed of a fixed blade frame and a movable blade frame is attached to a tip of the front part arm of the work arm. A hoisting device winding a wire rope around by a winch by stretching the wire rope around a plurality of pulleys engaged with the heavy machine boom along the axial direction of the work arm is provided. The rotary driving unit is constituted in such a way that an outer cylindrical member in which a plurality of recessed spherical faces are formed in a corrugated manner on a circumferential wall face and an inner cylindrical member having a disc block fitted into the inside of the outer cylindrical member are rotatably and mutually linked and a plurality of hydraulic pistons in which a spherical body coming in and out of the recessed spherical face of the outer cylindrical member is fitted are radially arranged in the disc block. A digging bucket part is provided in the fixed blade frame of the work attachment. COPYRIGHT: (C)2004,JPO&NCIPI