PROBLEM TO BE SOLVED: To provide such a rotary tilling machine as to enable the openings of its tine shaft to be surely closed by simple operation.SOLUTION: The rotary tilling machine includes: a hollow tine shaft 15 fitted with a plurality of tilling tines 12 on its outer circumference and a rotary shaft 13 subject to rotary driving around the axis. In this tilling machine, while the rotary shaft 13 is inserted through the opening at one end of the tine shaft 15 and fixed, the opening at the other end is closed with a stopper 24, wherein the stopper 24 has a radially elastically deformable projection 28 on its outer circumferential surface, and a radially penetrated fastening hole 18 is formed on the tine shaft 15 when the stopper 24 is inserted through the opening at the other end of the tine shaft 15, the projection 28 of the stopper 24 goes through the fastening hole 18 by elastically restorative force, serving as an antislipping-off role for the stopper 24 while closing the fastening hole 18.COPYRIGHT: (C)2013,JPO&INPIT【課題】ロータリ耕耘装置における爪軸の開口を簡便な操作で確実に塞ぐことができるようにすること。【解決手段】複数の耕耘爪12を外周に装着してなる中空の爪軸15と、軸心周りに回転駆動するロータリ軸13とを備え、爪軸15の一端部の開口にロータリ軸13を挿入して固定しつつ、爪軸15の他端部の開口を栓部材24によって塞いでおり、栓部材24が、径方向に弾性変形可能な突起28を外周面に有しており、爪軸15に径方向に貫通する係止孔18が形成されており、栓部材24を爪軸15の他端部の開口に挿入すると、栓部材24の突起28が、弾性復元力によって係止孔18に進入して、係止孔18を塞ぎつつ栓部材24の抜け止めとなる。【選択図】図3
