PROBLEM TO BE SOLVED: To provide a tilling claw that suppresses load fluctuation when striking into the soil, reduces tillage vibration and horsepower consumption, and meanwhile, has excellent abandoning, inverting and deep-tilling properties.SOLUTION: A tilling claw includes: a base part fitted to a flange of a rotary claw shaft a vertical blade part having a blade edge which is formed of a flat plate extending continuously and horizontally to a horizontal blade curvature start part from the base part in a side view and formed below a lower edge of the base part with a step interposed therebetween and a horizontal blade part formed of a curved plate which is extended continuously from the vertical blade by bordering the horizontal blade curvature start part, formed while having a width dimension larger than that of the base part toward the tip end side, formed while gently curving upward in the side view, and curved toward one side by bordering the horizontal blade curvature start part. The horizontal blade part is curved at an obtuse angle in the side view orthogonal to the horizontal blade curvature start part, and the tip end part of the horizontal blade part before the curve includes a first region which extends upward from the lower end of the horizontal blade part, and a second region which continues from the first region and extends upward while curving or bending inward.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】 土壌への打込み時における負荷変動を抑え、耕耘振動や消費馬力を低減するとともに、放てき性、反転性、深耕性に優れた耕耘爪を提供する。【解決手段】回転爪軸のフランジに装着される基部と、側面視における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、基部の下縁から段差を介して刃縁を備える縦刃部と、縦刃部から横刃湾曲開始部を境として連なって伸び、先端部側にかけて基部の幅寸法以上の幅寸法を備えて形成し、側面視にて上方へ緩やかに湾曲して形成されるとともに、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てなり、横刃部は、横刃湾曲開始部に直交する断面視において鈍角をなして湾曲され、湾曲前における横刃部の先端部は、横刃部の下端から上方へ延びる第1領域と、第1領域から連続し、内側方向へ湾曲又は屈曲して上端へ延びる第2領域とを備えることを特徴とする耕耘爪。【選択図】 図1
