PROBLEM TO BE SOLVED: To achieve a tiller capable of preventing damage of tilling claws, when receiving a shock by hitting a stone, etc., on tilling and also capable of reducing the shock to an operator.SOLUTION: This tiller having a driving shaft 36 rotatively driven by a driving source, a first rotor plate 41 installed with inclined multiple first tilling claws 41b at its outer circumferential part in circumferential direction as a row and having a cylindrical boss at its axial center fixed at the driving shaft 36, and a second rotor plate 42 installed with second tilling claws 42c inclining in opposite direction to the first tilling claws 42b inclining to the first rotor plate 41 side at the outer circumferential part, and having a cylindrical boss at the axial center fixed at the driving shaft 36, is provided with an elastic material 40 at an insertion hole part to the driving shaft 36 of the cylindrical boss 43 at the axial centers of the rotor plates 41, 42.COPYRIGHT: (C)2013,JPO&INPIT【課題】耕耘時に石などに当たって衝撃を受けた際に、耕耘爪の損傷を防止して作業者への衝撃も軽減させることができる耕耘機を実現する。【解決手段】駆動源により回転駆動される駆動軸36と、傾斜する複数の第1耕耘爪41bが外周部に周方向に並べて設けられ駆動軸36に固定する軸心に円筒状のボスを有する第1ロータ板41と、第1ロータ板41側に傾斜する第1耕耘爪42bと反対側に傾斜する第2耕耘爪42cが外周部に設けられ駆動軸36に固定する軸心に円筒状のボスを有する第2ロータ板42を有する耕耘機において、ロータ板41、42の軸心の円筒状のボス43の駆動軸36への挿入穴部に弾性材40を設けた。【選択図】図3
