PROBLEM TO BE SOLVED: To provide a tillage ground levelling work machine including an extension ground levelling body preventing reduction of a ground levelling function of a field surface even when the extension ground levelling body is brought into a high front low rear state.SOLUTION: A tillage ground levelling work machine includes: a tillage rotor supported so as to be rotated by receiving power from a travel machine body an upper cover covering an upper part of the tillage rotor a ground levelling body arranged in a rear part of the upper cover so as to be rotated vertically an extension ground levelling body arranged in an edge in a width direction of the ground levelling body so as to be rotated vertically with a rotation center shaft as a center and a rotation amount adjustment mechanism including a position adjustment member supported so as to approach and separate from the rotation center shaft, contacting the edge in the width direction of the ground levelling body, and capable of adjusting a rotation amount of the extension ground levelling body.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】延長整地体が前高後低状態になった場合でも、圃場表面の整地機能が低下しない延長整地体を有した耕耘整地作業機を提供する。【解決手段】耕耘整地作業機、走行機体からの動力を受けて回転可能に支持された耕耘ロータと、前記耕耘ロータの上部を覆う上部カバーと、前記上部カバーの後部に上下方向に回動自在に設けられた整地体と、前記整地体の幅方向端部に、回動中心軸を中心として上下方向に回動自在に設けられた延長整地体と、前記回動中心軸に対して接近及び離反可能に支持されて前記整地体の幅方向端部に接触して前記延長整地体の回動量を調整可能な位置調整部材を有する回動量調整機構と、を備える。【選択図】図1
