| 摘要 |
PROBLEM TO BE SOLVED: To provide a farm field working machine having a chisel with a cut knife which can be used without exchanging the cut knife to another cut knife, is reduced in exchange work, and is excellent in economical efficiency.SOLUTION: A farm field working machine is connected to a three-point link of a tractor 39 via a joint 3, and comprises a frame, a beam 21, a wing 30, a chisel 25 and a cut knife 26 attached to the chisel 25. A first cutting blade 54 and a second cutting blade 55 are formed at two oblique sides of the cut knife 26 which is formed into an isosceles triangle in a side face view. Either of the first cutting blade 54 or the second cutting blade 55 is detachably fixed to a front face of the chisel so as to be exchangeable while progressing frontward of the work advancing direction by making a protrusion of a bottom side 44 of the cut knife 26 abut on the front face of the chisel and fixing it thereto with a bolt. |
