PROBLEM TO BE SOLVED: To provide a tillage pawl structure and tillage pawl shape enabling smooth tilling work even if pebbles and the like are mixed in soil, and enabling various adjustment of a soil-digging width.SOLUTION: An attachment 30 of a tillage pawl structure 20 has a sleeve 32 mounted to a tilling shaft 17 of a tiller 10 in a relatively unrotatable and detachable manner, and brackets 33A and 33B fastened to the sleeve at axial-direction intervals. Tillage pawls 40 are mounted detachably to a plurality of holders 31 extending radially from a rotation center O, respectively. In the tillage pawl, an intermediate part 42 is formed at an angle α on one surface side from a base end part 41 which has an insertion part 411 mounted detachably to the holder, and a tip end part 43 is formed at an angle β on the other surface side from the intermediate part. An outer edge of the tip end part is located on a circular arc of a virtual circumscribed circle D having a predetermined radius from the rotation center O. A scoop 46 formed of the intermediate part and the tip end part enters soil to dig up the soil.COPYRIGHT: (C)2014,JPO&INPIT【目的】土壌に小石などが混入していても円滑に耕耘作業を行うことができると共に、土壌掘削幅を多様に調節可能な耕耘爪構造体および耕耘爪形状を提供する。【構成】耕耘爪構造体20のアタッチメント30は、耕耘機10の耕耘軸17に相対回転不能且つ着脱可能に装着されるスリーブ32と、スリーブに軸方向間隔をおいて固着されるブラケット33A,33Bとを有し、回転中心Oから放射状に延長する複数のホルダー31に各々耕耘爪40が着脱可能に装着される。耕耘爪は、ホルダーに着脱可能に装着される挿入部411を有する基端部41から一面側に角度αをなして中間部42が形成され、さらに中間部から他面側に角度βをなして先端部43が形成され、先端部の外縁は回転中心Oから所定半径を持つ仮想外接円Dの円弧上に位置し、中間部と先端部とで形成されるスコップ46が土壌に入り込んで土壌を掘り起こす。【選択図】図3
