PROBLEM TO BE SOLVED: To solve the problems, that the space on the front side of a float set on a seedling planting part and of the rear side of rear wheels of a running body is small in a conventional seedling transplanter, positioning of a land-grading device thereon is difficult, and a newly attached land-grading device is difficult to be elevated without causing interfering with the seedling planting part or elevating linking mechanism.SOLUTION: There are provided a seedling transplanter which is formed by connecting a seedling planting part (4) having a float (27a) and a seedling planting device (25) to the rear part of a traveling body via an elevating link mechanism that has a land-grading device (28) supported by the seedling planting part (4) on the front side of the seedling planting part and on the rear side of the traveling body via a support arm (32), and setting a support arm (32) to be vertically turnable via a spring. By having the land-grading device (28) lowered relative to the seedling transplanting part (4), the upward movement of the elevation link mechanism cannot be obstructed by downward action of a predetermined weight, and having the support arm (32) turning and retreating downward, the seedling planting part (4) is elevated to a non-planting position by the elevating link mechanism.COPYRIGHT: (C)2009,JPO&INPIT【課題】 従来の乗用田植機は、苗植付部のフロートの前方で走行車体の後輪後方には小さな空間しかなく整地装置を配置することが難しく、また、新たに付設した整地装置を苗植付部や昇降リンク機構に干渉させずに上昇させることは困難であった。【解決手段】 走行車体の後部に昇降リンク機構を介してフロート(27a)及び苗植付装置(25)を装備した苗植付部(4)を昇降自在に連結し、苗植付部(4)の前側で走行車体の後側に苗植付部(4)により支持アーム(32)を介して支持された整地装置(28)を設け、支持アーム(32)をバネを介して上下回動自在に設け、昇降リンク機構により苗植付部(4)を非植付位置に上昇させたときに、所定の荷重が上方から作用して支持アーム(32)が下方に回動して退避することにより、前記整地装置(28)が苗植付部(4)に対して相対的に下降して昇降リンク機構の上方への移動を妨げない構成とした苗移植機とした。【選択図】 図3
