PROBLEM TO BE SOLVED: To easily remove weeds and mud when weeds, mud and the like are jammed in a tilling cover of a tiller.SOLUTION: In a rotary tiller, the upper peripheral part of a tilling claw is covered with a tilling cover, a rear cover is supported to freely vertically turn around a lateral pin at the rear end part of the tilling cover, the front end part of a hitch connecting rod is journaled to a tilling frame to freely rotate around the lateral axis, and an auxiliary work machine and a tail wheel can be mounted to a hitch fitted to the rear end part of the hitch connecting rod. A top link mast erected on the tilling frame and the rear part of the hitch connecting rod are connected to each other by expandable and contractible tilling depth control means, and the hitch connecting rod and the rear cover are connected to each other by a wire. The hitch connecting rod is divided into a front hitch connecting rod and a rear hitch connecting rod so that it can be freely controlled to expand and contract in the longitudinal direction, and the rear retch connecting rod is provided with a plurality of wire adjustment fitting holes in the longitudinal direction.COPYRIGHT: (C)2014,JPO&INPIT【課題】耕耘装置の耕耘カバー内に草類や泥などが詰まった場合、草類や泥を容易に除去する。【解決手段】耕耘爪の上部周辺部を耕耘カバーで被覆し、耕耘カバーの後端部に左右方向のピン回りにリヤーカバーを上下回動自在に支持し、耕耘フレームにヒッチ連結棒の前側端部を左右方向の軸回りに回動自在に軸支し、ヒッチ連結棒の後側端部に取り付けたヒッチに補助作業機や尾輪を取り付け可能に構成し、耕耘フレームに立設しているトップリンクマストとヒッチ連結棒の後側部との間を伸縮自在な耕深調節手段により連結し、ヒッチ連結棒とリヤーカバーと間をワイヤにより連結しているロータリ耕耘装置において、ヒッチ連結棒を前側ヒッチ連結と後側ヒッチ連結棒とに分割構成して前後方向に伸縮調節自在に構成し、後側ヒッチ連結棒には前後方向に沿った複数のワイヤ調整取付孔を構成する。【選択図】図2
