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 reverse direction to the rotation direction, and the horizontal blade part 30 is bent in one side direction. The bending-starting line Ls has a prescribed slope to the opposite side of the attaching base part 10 in the side view in the tilling shaft center 3a direction when the intersecting point P1 of the bending-starting line Ls of the horizontal blade part 30 and a blade edge part 50 is arranged at the lowest terminal position in a state in which the tilling tine 1 is attached to the tilling shaft 3, and the cutting width W is nearly twice of the vertical distance between the tip part of the blade edge part 50 and the intersecting point P1 in the side view in the tilling shaft center 3a direction when the intersecting point P1 of the bending-starting line Ls of the horizontal blade part 30 and the blade edge part 50 is arranged at the lowest terminal position in the state in which the tilling tine 1 is attached to the tilling shaft 3.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20が一側方に折曲されている耕耘爪1であって、折曲開始線Lsは、耕耘爪1を耕耘軸3に取り付けた状態で横刃部20の折曲開始線L2と刃縁部50との交点P1がほぼ最下端位置となるように配置したときの耕耘軸心3a方向の側面視において、取付基部10と反対側に向かって所定の傾きを有し、切削幅Wは、耕耘爪1を耕耘軸3に取り付けた状態で横刃部20の折曲開始線Lsと刃縁部50との交点P1がほぼ最下端位置となるように配置したときの耕耘軸心3a方向の側面視における刃縁部50の先端部と交点P1との垂直距離の約2倍の関係にあること。【選択図】図1
