< Topic >The liana and the string etc being coiled round to the Tip part of the manipulation pole it is prevention possible, rotary drag expulsion structure of the rotary blade for the Brush Cutter payment machine whose it is possible to do the cutting paying job of the weed and the like efficiently safely, is offered.SolutionsThe 1st blade section 45 which on the grain side aspect 24 of rotary blade 23, the annular spine 28 which is continued lap in direction of rotary blade 23, to form with press working, on edge 29 of spine 28, multiple to form 1st blade section 45, directing the blade of 1st blade section 45, direction of rotation anterior of rotary blade 23, it forms in the rotary blade 23 which in manipulation pole 10 of the Brush Cutter payment machine makes joint, adjoins lap to the direction of rotary blade 23 in the interval, rotary blade 23It is located direction of rotation anteriorly from the top on the one hand of 1st blade section 45, to the bottom of the other 1st blade section 45 which is located on the direction of rotation back of the rotary blade 23, gently continuing, the edge 29 which has been connected is formed.< Choice figure >Drawing 2【課題】つる植物や紐等が操作棹の先端部分に巻き付くことを防止可能であり、雑草等の刈り払い作業を効率良く安全に行うことが可能な刈払機用回転刃の回転阻害要因排除構造を提供する。【解決手段】刈払機の操作棹10に接続にされた回転刃23において、回転刃23の表側面24の上に、回転刃23の周方向に連続する環状の突起部28を、プレス加工によって形成し、突起部28の稜線29の上に、複数個の第1の刃部45を形成し、第1の刃部45の刃を、回転刃23の回転方向前側に向けて形成し、回転刃23の周方向に隣接する第1の刃部45どうし間において、回転刃23の回転方向前側に位置する一方の第1の刃部45の上端部から、回転刃23の回転方向後側に位置する他方の第1の刃部45の下端部まで、なだらかに連続して連なっている稜線29を形成する。【選択図】図2
