PROBLEM TO BE SOLVED: To provide a levee plastering machine making constant the cutting amount of a levee crown by a levee crown treatment rotor regardless of the unevenness of the levee crown of an old levee or a field.SOLUTION: The levee plastering machine includes the levee crown treatment rotor 41 having a plurality of tilling claws for cutting through the levee crown of the old levee. The rotor is rotatably supported to the other end of a levee crown power transmission frame 42 with one end turnably connected to a connecting shaft of the treatment rotor and with the other end side vertically swingable and energized downward by an energizing apparatus 35. The rear side of the levee crown power transmission frame 42 is provided with a parallel link mechanism 55, and the tip side is provided with a grounding member 50 grounded on the levee crown of the old levee. The levee crown power transmission frame 42 constitutes a part of the parallel link mechanism 55, and a vertical distance between the bottom face of the grounding member 50 and the lower end of a rotating locus described by the tip of the tilling claw 44 of the levee crown treatment rotor 41 is constant.COPYRIGHT: (C)2013,JPO&INPIT【課題】圃場や旧畦の天場の凹凸に拘わらず天場処理ロータによる天場の削り量を一定にする畦塗り機を提供する。【解決手段】畦塗り機は、旧畦の天場を切り崩す複数の耕耘爪を有する天場処理ロータ41を備える。このロータは、前処理ロータの連結軸に一端部が回動自在に接続されて他端側が上下方向に揺動自在であり附勢装置35によって下方へ附勢される天場動力伝達フレーム42の他端部に回転可能に支持される。天場動力伝達フレーム42の後方側には平行リンク機構55が設けられ、この先端側に旧畦の天場に接地される接地部材50が設けられる。天場動力伝達フレーム42は、平行リンク機構55の一部を構成し、接地部材50の底面と天場処理ロータ41の耕耘爪44の先端部が描く回転軌跡下端との間の上下距離は一定である。【選択図】 図4
