PROBLEM TO BE SOLVED: To simply and easily mount an end part of a linear member that is used for preventing grass winding.SOLUTION: A grass winding prevention mechanism of a rotary tiller is characterized by: fixing a large number of claw brackets 4 for mounting tilling claws 3 spaced apart in a claw shaft direction and a circumferential direction on an outer circumferential surface of a claw shaft 2 rotatably supported around an axial center providing a supporting member 6 to each of the claw brackets 4 positioned at both ends in the claw shaft direction and mounting both ends of a linear member 5 for preventing grass winding to both supporting members 6. The linear member 5 has an enlarged diameter end member 7 forming a tip enlargement part 7b of a diameter size at an end part. The supporting member 6 is formed with an engagement hole 8 detachably engaged with the enlarged diameter end member 7. The engagement hole 8 has an enlarged diameter hole 8a with a tip enlargement part 7b of the enlarged diameter end member 7 insertable therein, and a detachment prevention groove 8b in communication with a direction approaching the claw shaft 2 from the enlarged diameter hole 8a and passing the linear member 5 while preventing detachment of the tip enlargement 7b.COPYRIGHT: (C)2015,JPO&INPIT【課題】 草巻付き防止用の線状部材の端部を簡単かつ容易に取り付けることができるようにする。【解決手段】 軸心回りに回転自在に支持された爪軸2の外周面に、爪軸方向及び周方向に離間して耕耘爪3を装着する多数の爪ブラケット4を固定し、爪軸方向両端側に位置する爪ブラケット4にそれぞれ支持部材6を設け、両支持部材6に草巻付き防止用の線状部材5の両端を取り付けたロータリ耕耘機の草巻付き防止機構である。前記線状部材5は端部に径大の先端拡大部7bを形成した拡径端部材7を有し、前記支持部材6に拡径端部材7と係脱自在に係合する係合孔8を形成しており、前記係合孔8は、拡径端部材7の先端拡大部7bが挿入可能な拡径孔8aと、この拡径孔8aから爪軸2に近づく方向に連通していて先端拡大部7bの抜け止めをしながら線状部材5を通す抜け止め溝8bとを有する。【選択図】図1
