PROBLEM TO BE SOLVED: To smoothly perform regular plane cultivation work and ridging work.SOLUTION: Right and left cultivation shafts (32) are configured to rotate forward and backward, and a cultivation frame (41) is disposed to cover a rotary cultivation device (8) above the center. Right and left cultivation covers (42) are supported by hinges (42a) to the right and left sides of the cultivation frame (41). The posture of the right and left cultivation covers can be changed to the opened state in which both right and left cultivation covers are rotated upward, or to the closed state in which both sides of the rotary cultivation device (8) are covered by the cultivation covers. Rear covers (56) are attached to the rear of the right and left cultivation covers (42) respectively in such a state as to hang down to cover the right and left side of the rear of the rotary cultivation device (8). A leveling plate (57) is attached to the rear end of the cultivation frame (41) in such a way as to hang down to cover the rotary cultivation device (8) at the center on the rear side.COPYRIGHT: (C)2012,JPO&INPIT【課題】本願発明は、通常の平面耕耘作業と畦立て作業を円滑に行うことを課題とする。【解決手段】左右耕耘軸(32)を正逆転可能に構成し、ロータリ耕耘装置(8)の中央部上方を覆う耕耘フレーム(41)を設け、耕耘フレーム(41)の左右両側部に左右耕耘カバー(42)をヒンジ(42a)により支持する構成とし、左右耕耘カバーの左右両側を上方に回動した開放状態と、ロータリ耕耘装置(8)の左右両側部を覆う閉鎖状態とに姿勢変更可能とし、左右耕耘カバー(42)それぞれの後部にはリヤカバー(56)を垂れ下がり状に取り付け、ロータリ耕耘装置(8)の左右後部を覆う構成とし、耕耘フレーム(41)の後端部に整地板(57)を吊り下げ状に取り付け、ロータリ耕耘装置(8)の後側中央部を覆う構成とする。【選択図】 図18
