PROBLEM TO BE SOLVED: To provide a tilling claw in which a tilling performance is hard to be reduced even if worn out by use.SOLUTION: A tilling claw 1 includes a mounting base 10 mounted to a tilling shaft 3, a vertical blade part 20 continuing to the mounting base, and a horizontal blade part 30 continuing to the vertical blade part. The tilling claw is curved reversely to the rotation direction from the vertical blade part to the horizontal blade part. Also, the horizontal blade part is bent from a folding start line Ls being a boundary with the vertical blade part to one side. In side view of the tilling axial direction at the time when an intersection point between the folding start line and a cutting edge part is disposed to become substantially the lowermost end position while being mounted in the tilling shaft, the folding start line is inclined at 3-13° toward the opposite side to the mounting base. Thereby, an angle formed by a line perpendicular to a line connecting between the tip of the cutting edge part and the axial center of the tilling shaft, and the folding start line, is 30-40°. In the tilling axial direction, a distance from the side surface of the mounting base to the tip of the horizontal blade part is approximately 2 times of the vertical distance between the tip part of the cutting edge part and the intersection point.COPYRIGHT: (C)2015,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提供する。【解決手段】耕耘軸3に取り付けられる取付基部10と、該取付基部に連続する縦刃部20と、該縦刃部に連続する横刃部30とを有し、前記縦刃部から前記横刃部にかけて回転方向と逆向きに湾曲されているとともに、前記横刃部が前記縦刃部との境界である折曲開始線Lsから一側方に折曲され、前記耕耘軸に取り付けた状態で前記折曲開始線と刃縁部との交点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方向の側面視において、前記折曲開始線を、前記取付基部と反対側に向かって3~13°で傾けることにより、刃縁部の先端と前記耕耘軸の軸心とを結ぶ線に直交する線と前記折曲開始線とのなす角を30~40°とし、耕耘軸心方向において前記取付基部の他側方面から前記横刃部の先端までの距離は、刃縁部の先端部と前記交点との垂直距離の約2倍の関係にある耕耘爪1。【選択図】図1
