PROBLEM TO BE SOLVED: To solve a problem that, in a seedling transplanter in which a seedling transplanting work device is attached to a traveling vehicle having steering left and right front wheels and left and right rear wheels so as to be liftable, a driver is required to perform a powering-on/off operation of a working device and an ascending/descending operation of the working device in addition to a swirl steering operation of a machine body, the driver cannot dedicate himself/herself to the steering operation at a swirl, and there arises a problem in swirl operability.SOLUTION: A seedling transplanter comprises: a control device (170) which calculates a traveling distance since left and right front wheels are steered at a prescribed angle or larger by traveling distance calculation means, and performs automatic swirl control for outputting a command at which a seedling transplanting work device is descended according to the traveling distance and notification means which notifies that the seedling transplanter is in the control in succession to the automatic swirl control.COPYRIGHT: (C)2015,JPO&INPIT【課題】 操向用の左右前輪と左右後輪を設けた走行車両に苗移植作業装置を昇降自在に装着した苗移植機において、旋回時に、操縦者は機体の旋回操向操作以外に、作業装置の駆動の入り切り操作や作業装置の上昇・下降操作をしなければならず、旋回時の操向操作に専念できず、未だ、旋回操作性の点において課題があった。【解決手段】 走行距離算出手段にて左右前輪を所定角度以上に操向操作してからの走行距離を算出して、該走行距離に応じて苗移植作業装置が下降する指令を出力する自動旋回制御を行う制御装置(170)を設け、自動旋回制御中に連続して該制御中であることを報知する報知手段を設けた苗移植機とした。【選択図】 図6
