| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a cutter that causes no cutting force deterioration due to weakening of contact pressure (mechanical resistance) of a rotary blade and weeds and that generates no rolling-in phenomenon in which the shaft of the rotary blade is entangled with cut weeds.SOLUTION: On the upper face of the base material of the rotary blade 3, there are installed rectangular wing pieces 7 that radially project from the center to the outer periphery. An air stream is generated upwardly from the lower part by the function of the wing pieces 7, so that weeds are held upright to improve the cutting force. At the same time, the cut weeds are blown away and prevented from the phenomenon of rolling in the shaft of the rotary blade 3.</p> |
