< Topic >It can make the exchange only of the blade section which wears easy, repeatedly to install the blade section and, change direction and be able to use, life is long result, the blade interfering the obstacle, there is no rebounding and offers the rotary blade of the Brush Cutter payment machine whose security is high.SolutionsExchange blade 1 of multiple Tanzaku conditions is interposed between the edged tool holders which consist of board 2of a the disk condition two and 2b, the center section of the exchange blade revolution is installed unrestrictedly with pin 3, the exchange blade gradient by resistance when disconnecting, above configuration angle in order gradient, stopper 4 is provided.< Choice figure >Drawing 1【課題】摩耗した刃部のみの交換が容易に出来、刃部は、取り付け方向を変えて繰り返し使用出来、寿命が結果的に長く、刃が障害物と干渉しても、跳ね返りが無く安全性が高い刈払機の回転刃を提供する。【解決手段】二枚の円盤状の板2a,2bよりなる刃物ホルダーの間に、複数の短冊状の交換刃1を挿入し、交換刃の中央部をピン3で回転自在に取り付け、交換刃が切断時の抵抗で傾いても、設定角度以上は傾かないようにストッパー4を設ける。【選択図】図1
