PROBLEM TO BE SOLVED: To provide a riding-type rice transplanter ensuring land-leveling work to be conducted accurately by subjecting a land-leveling rotor, especially a center rotor, to lift control according to the variations in vehicle speed to prevent the rotor from being got into the ground.SOLUTION: The riding-type rice transplanter includes a land-leveling rotor (27) including a front center rotor (27b) and a rear side rotor (27a) and functioning to level the surface of a farm just before planting, on the front side of a seedling planting portion (4), wherein the land-leveling rotor (27) is vertically movably constructed according to the variation in vehicle speed, and also associatedly constructed so as to put the front center rotor to rising displacement as the vehicle speed increases at a predetermined rate or greater.COPYRIGHT: (C)2011,JPO&INPIT【課題】本発明の課題は、車速の変化に応じて整地ロータ、特に中央のセンタロータを昇降制御することによって、ロータの地中への潜り込みを防止し、整地作業が的確に行えるようにする。【解決手段】この発明は、苗植付部(4)の前側に植付直前の圃場面を均平化する前位のセンタロータ(27b)と後位のサイドロータ(27a)からなる整地ロータ(27)を設置し、該整地ロータ(27)は、車速の変化に応じて上下動可能に構成すると共に、車速の所定以上の増速に伴い前位のセンタロータが上昇変位すべく関連構成する。【選択図】 図12
