PROBLEM TO BE SOLVED: To stabilize ridging work by a tiller and facilitate switching between ridging work and tilling work.SOLUTION: An upper part of a tilling rotor (51) is covered with a tilling cover (53), a ridging device (55) having inverted trapezoidal form by back view is placed at a rear end of the tilling cover (53) in a vertically tiltable manner, a hitch (57) is attached to a rear end of the tilling cover (53), a supporting rod (59) to support a tail wheel (58) is attached to the hitch (57), and the tail wheel (58) is positioned behind the ridging device (55) suspended from the tilling cover (53). A cover hole (61) having an inverted trapezoidal form is formed at lateral center of a rear cover (56), and the ridging device (55) is positioned at the cover hole (61). The rear cover (56) is connected to the ridging device (55) in a tilling posture (C), and the connection of the rear cover (56) and the ridging device (55) is released and the rear cover (56) is tilted upward and connected to the hitch (57) in an earthing posture (A).COPYRIGHT: (C)2014,JPO&INPIT【課題】畝立作業を安定させると共に、畝立作業と耕耘作業を簡単に切り換えられることを課題とする。【解決手段】耕耘ロータ(51)の上方を耕耘カバー(53)で覆い、耕耘カバー(53)の後端部に背面視で逆台形状の畝立器(55)を上下回動可能に設け、耕耘カバー(53)の後端部にヒッチ(57)を設け、該ヒッチ(57)に尾輪(58)を支持する支持杆(59)を取り付け、耕耘カバー(53)から垂下する畝立器(55)の後方に尾輪(58)を位置させる。また、リヤカバー(56)の左右中央部には逆台形状のカバー穴(61)を形成し、カバー穴(61)に畝立器(55)を位置させる構成とし、耕耘姿勢(C)においては、リヤカバー(56)と畝立器(55)を連結し、培土姿勢(A)においては、リヤカバー(56)と畝立器(55)の連結を解除し、リヤカバー(56)を上方へ回動してヒッチ(57)に連結する。【選択図】 図7
