PROBLEM TO BE SOLVED: To provide a seedling transplanter capable of quickly resuming planting without impairing protection of a planting part in a descent and the detecting accuracy of the field surface when carrying out the lifting control of the planting part, interlocked with turning operation.SOLUTION: The seedling transplanter includes: traveling parts (2, 3) for traveling the field the planting part (6) having a field surface sensor (6s) for detecting the height of seedling planting work, and liftable by a lifting link (5) and a turning-interlocked lifting mechanism for liftingly holding the planting part (6) with the start of turning with a rolling mechanism (7) for laterally and horizontally adjusting the angle of the planting part (6), and returning the planting part (6) to the working height at the end of turning. The seedling transplanter further includes a position detector (5s) for detecting the height position of the planting part (6). The working height of the planting part (6) at the start of turning is stored by the position detector (5s), and the turning-interlocked lifting mechanism is configured to attain switching control of a descending speed above and below a height position, higher by a predetermined distance than the stored working height position, as a boundary when the planting part (6) descends at the end of turning.COPYRIGHT: (C)2013,JPO&INPIT【課題】旋回操作連動で植付部を昇降制御する場合に、下降時の植付部の保護と圃場面の検出精度を損なうことなく、速やかに植付を再開できる苗移植機を提供する。【解決手段】苗移植機は、圃場走行用の走行部(2,3)と、苗移植の作業高さを検出する圃場面センサ(6s)を備えて昇降リンク(5)により昇降可能な植付部(6)と、この植付部(6)を左右水平に角度調節するローリング機構(7)と、の旋回開始で植付部(6)を上昇保持し、旋回終了で作業高さに戻す旋回連動昇降機構とを設けて構成され、上記植付部(6)の高さ位置を検出する位置検知装置(5s)を設け、この位置検知装置(5s)により、旋回開始時の植付部(6)の作業高さを記憶するとともに、旋回終了時の植付部(6)の下降の際に、記憶による作業高さ位置から上方に所定距離の高さ位置を境にその上下で下降速度を切替え制御可能に上記旋回連動昇降機構を構成したものである。【選択図】図1
