PROBLEM TO BE SOLVED: To change a position of a horizontal axis of a fulcrum shaft by a position change mechanism to a perpendicular direction perpendicular to a travel direction of a travel machine body and to an oblique direction crossing obliquely the travel direction of the travel machine body, to discharge soil loaded onto a soil carriage to a rear part or side part of the soil carriage by changing a position of the horizontal axis of the fulcrum shaft to the perpendicular direction or oblique direction, to enhance versatility of the discharge position of soil, and to enlarge work uses.SOLUTION: An attachment frame 3 is arranged in a travel machine body 1 by a connection mechanism 2 so as to be moved vertically. A soil carriage 15 is arranged on the attachment frame so as to be inclined backward with a horizontal axis HL of a fulcrum shaft 24 as a center. A plow member 12 is arranged in a lower part of the attachment frame in a front-lowered state. A position change mechanism 30 is arranged which can change a position of the horizontal axis of the fulcrum shaft to a perpendicular direction T perpendicular to a travel direction of the travel machine body and an oblique direction S crossing obliquely the travel direction of the travel machine body.SELECTED DRAWING: Figure 10
