PROBLEM TO BE SOLVED: To provide a tail part cutting device which can reliably cut off a tail and a fibrous root of root crops harvested in late fall and the root crops that are slightly dried in a root crop harvester having the tail part cutting device.SOLUTION: A root crop harvester has a fibrous root cutting device 57 provided below a pull-out conveyor 24 which pulls out root crops and conveys them to the back. In the root crop harvester, the fibrous root cutting device 57 comprises a guide cover 44 having a plurality of slits 44s formed in a conveying direction and rotating blades 46 which rotate in a horizontal direction inside the guide cover 44. The guide cover 44 is formed into an arc shape in a side view, and a plurality of the rotating blades 46 are provided to rotate with a blade edge getting close to an arc-shaped inner peripheral wall inside the guide cover 44. In the plurality of the rotating blades 46, the rotating blade located on a lower side has a larger diameter.COPYRIGHT: (C)2015,JPO&INPIT【課題】本発明は、尾部切断装置を設けた根菜類収穫機において、晩秋頃の根菜類や乾燥気味の根菜類の尻尾やひげ根を確実に切り落すことのできる尾部切断装置とすることを課題とする。【解決手段】根菜類を引き抜いて後方へ搬送する引抜搬送装置24の下部にひげ根切断装置57を設けた根菜類収穫機において、ひげ根切断装置57は、搬送方向に沿った複数のスリット44sを形成したガイドカバー44と、ガイドカバー44の内部で水平方向に回転する回転刃46とで構成し、ガイドカバー44を側面視で円弧状に形成し、ガイドカバー44内に円弧状内周壁に刃先が接近して回転するように複数の回転刃46を設け、複数の回転刃46は、下側に設けるものほど大径とすることを特徴とする根菜類収穫機とする。【選択図】 図8
