PROBLEM TO BE SOLVED: To provide a tilling claw which reduces tilling vibration and horsepower consumption by suppressing stress concentration caused when a tilling claw is driven into soil and load changes caused thereby, and shows excellence in tilling performance in throwing force, rotation, plowing, soil crushing, and land leveling.SOLUTION: A tilling claw comprises: an attaching base (1) fitted to an attaching flange (S0) of a rotation claw shaft (S) a vertical blade part (2) with a blade edge which is formed by a flat plate up to a lateral blade curvature start part (G) continuously extending in a lateral direction from the attaching base (1) viewed from the side when the surface with the rotation shaft axis of the rotation claw shaft (S) as a normal line is taken as a side surface, and which is formed downward from the lower edge of the attaching base (1) through a level difference and a lateral blade part (3) formed by a curvature plate which is continuously extends from the vertical blade part (2), with the lateral blade curvature start part (G) as a boundary, the curvature plate being formed with a width size equal to or greater than the width size of the attaching base (1) from the vertical blade part (2) to the tip side, the curvature plate being formed gently curved upward in side view, and the curvature plate being curved to one side, with the lateral blade curvature start part (G) as a boundary.COPYRIGHT: (C)2014,JPO&INPIT【課題】土壌への打込み時における応力集中及びそれによる負荷変動を抑え、耕耘振動や消費馬力を低減するとともに、放てき力、反転性、すきこみ性、砕土性、均平性の各種耕耘性能に優れた耕耘爪を提供する。【解決手段】回転爪軸の取付けフランジに装着される取付け基部と、前記回転爪軸の回転軸線を法線とする面を側面としたとき、側面視における前記取付け基部から横方向に連なって伸びる横刃湾曲開始部までの平面板から形成され、前記取付け基部の下縁から段差を介して下方に形成される刃縁を備える縦刃部と、前記縦刃部から横刃湾曲開始部を境として連なって伸び、前記縦刃部から先端側にかけて、前記取付け基部の幅寸法以上の幅寸法を備えて形成し、側面視において上方へ緩やかに湾曲して形成されるとともに、前記横刃湾曲開始部を境として一方に湾曲される湾曲板から形成される横刃部とを備えることを特徴とする耕耘爪。【選択図】 図1
