PROBLEM TO BE SOLVED: To provide an economical tilling tine having a high tilling performance, removed with oscillating factors and suppressing tilling torque.SOLUTION: A tilling tine 1 is provided by having a vertical blade part 10 and a horizontal blade part 20, extending from a mounting base part 3 mounted at a tilling tine shaft 60, curving from the vertical blade part 10 to the horizontal blade part 20 in the reverse direction of its rotating direction, also curving the horizontal blade part 20 in one side direction to the vertical blade part 10. The vertical blade part 10 inclines to one side direction to a mounting base 3. In a cross-sectional shape of a tip of the horizontal blade part 20, the whole of a width direction curves in convexity to the same direction with a curve inside direction of a curve of the horizontal blade part 20 that curves in one side direction, and curves by a substantially constant curvature radius from a blade edge side to a peak edge side of the horizontal blade part 20.COPYRIGHT: (C)2014,JPO&INPIT【課題】耕耘性能が高く、振動要因が取り除かれ、耕耘トルクが抑えられて経済的な耕耘爪を提供する。【解決手段】耕耘爪1は、耕耘爪軸60に取り付けられる取付基部3から連続して延びる縦刃部10及び横刃部20を有し、縦刃部10から横刃部20にかけて回転方向と逆向きに弯曲するとともに、横刃部20が縦刃部10に対して一方側に弯曲する。縦刃部10は取付基部3に対して一側方に傾斜する。横刃部20の先端部の断面形状は、一側方に弯曲する横刃部20の弯曲の弯曲内側方向と同方向側に幅方向の全体が凸状に弯曲し、横刃部20の刃縁側から峰縁側にかけて略一定の曲率半径で弯曲している。【選択図】図1
