PROBLEM TO BE SOLVED: To solve a problem in a seedling transplanter, wherein, when roots elongated in a removable bed project from the bottom side of a seedling box on the growth of seedlings, the projected roots resist to the conveyance of the seedling box in a seedling box-supplying and conveying portion and to the takeout of the seedlings with a seedling takeout means, thereby making it impossible to properly convey the seedlings to a seedling-transplanting means and properly plant the seedlings.SOLUTION: This seedling transplanter having a seedling box-loading portion for loading a seedling box receiving grown seedlings, a seedling box-supplying and conveying portion for downward conveying the seedling box loaded in the seedling box-loading portion to a seedling takeout position, a seedling takeout means for taking out the seedlings from the seedling box placed at the seedling takeout position, and an empty seedling-conveying portion for upward conveying an empty seedling box from which the seedlings are taken out by the seedling takeout means, to a position below the seedling box-loading portion, is characterized by disposing a root-cutting device (60) for cutting roots projected from the bottom side of the seedling box in the seedling box-loading portion, and disposing a root guide means (89) for guiding the roots cut with the root-cutting device (60) to a position deviated from the upper side of the empty seedling-conveying portion.COPYRIGHT: (C)2008,JPO&INPIT【課題】 苗移植機において、育苗時に置床に伸長した根が苗箱の底面から突出していると、苗箱供給搬送部での苗箱搬送や苗取出し手段による苗取出しの抵抗となり、苗植付け手段へ苗を適正に移送できなくなって適正な苗の植付けができなくなるおそれがある。【解決手段】 育苗された苗を収容する苗箱を装填する苗箱装填部と、該苗箱装填部に装填された苗箱を苗取出し位置に向けて下側へ搬送する苗箱供給搬送部と、前記苗取出し位置にある苗箱から苗を取出す苗取出し手段と、前記苗取出し手段により苗が取出されて空になった苗箱を前記苗箱装填部の下方位置に向けて上側へ搬送する空箱搬送部とを備える苗移植機において、苗箱の底面から突出する根を切断する根切断装置(60)を苗箱装填部に設け、該根切断装置(60)で切断された根を空箱搬送部の上方から外れた位置へ案内する根案内手段(89)を設けた。【選択図】 図12
