PROBLEM TO BE SOLVED: To provide a pawl attachment structure of a rotary tillage apparatus, in which a tillage pawl inserted into a pawl holder is reliably fastened by a holder piece, and which enables the tillage pawl to be attached/detached with ease.SOLUTION: A pawl holder 3 with a pawl insertion space 3a, in which a front wall 11c on a rotational-direction downstream side is partially opened, is provided with a notched part 12 that communicates with the pawl insertion space 3a by notching a part of a side wall 11b together with the front wall 11c, and a holder piece 6 that has a screw hole 16 for screwing and inserting a bolt 7. A pawl base 5a, in which an engagement groove 9 is engaged with the bolt 7 inserted into the pawl holder 3, abuts on an inner surface of the side wall of the pawl holder 3 and an inner surface of the holder piece 6 to be fastened by the bolt 7.COPYRIGHT: (C)2014,JPO&INPIT【課題】爪ホルダに挿入した耕耘爪を、ホルダ片によって確実に締結すると共に、耕耘爪の着脱を容易に行なうことができるロータリ耕耘装置の爪取付構造を提供する。【解決手段】回転方向下流側の前壁11cを一部開放させた爪挿入空間3aを有する爪ホルダ3に、前壁11cと共に側壁11bの一部を切り欠いて爪挿入空間3aに通ずる切欠部12と、ボルト7を螺挿するネジ孔16を有するホルダ片6を設け、爪ホルダ3に挿入したボルト7に係合溝9を係合させた爪基部5aを、爪ホルダ3の側壁内面とホルダ片6の内面に接当させてボルト7によって締結するように構成にした。【選択図】図1
