PROBLEM TO BE SOLVED: To provide a rice transplanter which can interlock and connect an interlocking wire to the front end portion of a center float, to accurately transmit changes in the vertical movements of the center front end portion to the hydraulic driving portion of a lifting mechanism, even when a space that has ample size cannot be ensured, above the front end portion of a center float.SOLUTION: This rice transplanter 1 in which a planting portion 3 connected to a travel portion 2 through a lifting mechanism 4 is disposed, in a state vertically swinging a center float 31, in which an interlocking wire 46 is disposed between the front end portion of the center float and the hydraulic driving portion of the lifting mechanism, and in which the hydraulic driving portion is operated with the interlocking wire in interlock with the vertical movement of the center float front end portion to lift or lower the planting portion, has disposed a link mechanism 70 between the front end portion of the center float and the interlocking wire through a link mechanism 70 to push or pull the interlocking wire in the longitudinal direction, when the center float is swung with the link mechanism, disposing a support arm 61 for supporting the link mechanism, in a state vertically rotating the planting portion in a prescribed quantity, and energizing the support arm with an energizing member 81, in a state rotated in one way.COPYRIGHT: (C)2009,JPO&INPIT【課題】上方に十分な大きさの空間を確保できない場合でも、センターフロート前端部に連動ワイヤを連動連結して、該センターフロート前端部の上下動の変化を昇降機構の油圧駆動部に正確に伝える。【解決手段】走行部2に昇降機構4を介して連結した植付部3にセンターフロート31を上下方向に揺動可能に設けて、該センターフロート前端部と前記昇降機構の油圧駆動部との間に連動ワイヤ46を介設し、該連動ワイヤでセンターフロート前端部の上下動に連動させて油圧駆動部を作動させて、該植付部の昇降を行う田植機1において、前記センターフロートの前端部と連動ワイヤとの間にリンク機構70を介設し、該リンク機構によりセンターフロートの揺動時に連動ワイヤを前後方向に押し引きする構成とすると共に、前記リンク機構を支持する支持アーム61を植付部に上下方向に所定量回動可能に設け、該支持アームを付勢部材81で一方向に回動するように付勢した。【選択図】図4
