PROBLEM TO BE SOLVED: To provide a digging-out unit of root crops such as chinese yams, which is structured so that the drive of a belt conveyor of a digging-out body can be driven by continuously taking full advantage of the power taken through a tractor.SOLUTION: The root crop digging-out unit digs out root vegetables with a digging-out body passing through the bottom of them, the digging-out body includes a cutting part inclining upward to the rear in the front and a belt conveyor part having an inclined plane starting at the rear end of the cutting part to the upper rear part, the belt conveyor part is driven by a conveyor drive hydraulic motor 3e, the conveyor drive hydraulic motor 3e is driven by the oil pressure of a hydraulic pump 5a, the oil pressure of the hydraulic pump 5a is divided at least into two flows, the digging-out unit of root crops such as chinese yams is characterized by having a circuit structure in which the oil pressure system of the conveyor drive hydraulic motor 3e for driving the belt conveyor part can use the oil pressure of the hydraulic pump 5a with a higher priority to other system circuits.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2019,JPO&INPIT【課題】掘り取り体のベルトコンベアの駆動が、トラクタから取り入れた動力を常に最大限活用して駆動されるように構成された長いも等の根菜掘り取り機を提供する。【解決手段】掘り取り体を根菜の下方部に通過させて掘り上げる根菜掘り取り機であって、掘り取り体は、前部の後ろ上がり傾斜の刃部と、刃部後端部から後方側上方に向かう傾斜面を有するベルトコンベア部を備え、ベルトコンベア部はコンベア駆動油圧モータ3eによって駆動され、コンベア駆動油圧モータ3eは一つの油圧ポンプ5aの油圧によって駆動され、油圧ポンプ5aの油圧は少なくとも2系統に分流され、ベルトコンベア部を駆動するコンベア駆動油圧モータ3eの油圧系統が他の系統の回路より優先して油圧ポンプ5aの油圧を利用できる回路構成であることを特徴とした長いも等の根菜掘り取り機である。【選択図】 図6
