PROBLEM TO BE SOLVED: To provide a tilling tine hardly reducing the tilling performance even when being abraded by use.SOLUTION: The tilling tine 1 has an attaching base part 10 to be attached to a tilling shaft 3, a vertical blade part 20 continuing to the attaching base part 10, and a horizontal blade part 30 continuing to the vertical blade part 20, wherein the position from the vertical blade part 20 to the horizontal blade part 30 is bent in the direction reverse to the rotation direction, and further has a prescribed cutting width W caused by bending the horizontal blade part 30 in one side direction from a bending-starting line Ls which is the boundary of the horizontal blade part 30 and the vertical blade part 20. The bending-starting line Ls has a prescribed slope to the opposite side of the attaching base part 10 based on the straight line passing the shaft center 3a of the tiling shaft 3 and the center of the attaching base part 10, and when the straight line is assumed to the perpendicular line, the cutting width W is in the relation of nearly twice of the vertical distance from the intersecting point P1 of the bending-starting line Ls and a blade edge part 50 to the tip 31 of the blade edge part.COPYRIGHT: (C)2011,JPO&INPIT【課題】使用により摩耗しても耕耘性能が低下し難い耕耘爪を供する。【解決手段】耕耘軸3に取り付けられる取付基部10と、取付基部10に連続する縦刃部20と、縦刃部20に連続する横刃部30とを有し、縦刃部20から横刃部30にかけて回転方向と逆向きに湾曲されているとともに、横刃部30が縦刃部20との境界である折曲開始線Lsから一側方に折曲されて所定の切削幅Wをもつ耕耘爪1であって、折曲開始線Lsは、耕耘軸3の軸心3aと取付基部10の中心とを通る直線に対して取付基部10と反対側に向かって所定の傾きを有し、前記直線を垂線とみなしたとき、切削幅Wは、折曲開始線Lsと刃縁部50との交点P1から刃縁部の先端31までの垂直距離の約2倍の関係にあること。【選択図】図1
