PROBLEM TO BE SOLVED: To provide a transplanter capable of performing the control of the lifting up and down of a machine body stably, in which even if there are soil lumps, since conventionally, although there is a transplanter controlling the height of a machine body relative to a field surface by relating the movements of a ground-contacting sensor making contact with the field surface with a hydraulic switch valve performing the lifting up and down of the machine body to transplant seedlings by a prescribed planting depth, there is a problem that when there are soil lumps on a ridge, the lifting up and down of the machine body height can not be properly controlled by the constitution for controlling the height of the machine body relative to the ground surface in the conventional transplanter.SOLUTION: A transplanter provided with a transplanting tool 28 for transplanting objects to be transplanted on a machine body including a right and left traveling device 14 operated to be lifted up and down by a lifting device 23, is used to move up and down the lifting device 23 by switching and operating a lifting up and down-switching part 24a based on an average value of detected heights of the field surface measured by right and left ground contact-detecting bodies 36 and 37 arranged on right and left sides relative to the machine progressing direction.COPYRIGHT: (C)2014,JPO&INPIT【課題】従来、圃場面に接地する接地センサの動きを機体の昇降を行なう油圧切換バルブに関連させることにより、圃場面に対する機体の高さを制御して、所定の植え付け深さで苗を植付けるようにした移植機がある。しかし、該従来の移植機における圃場面に対して機体の高さを制御する構成では、畝上に土塊があった場合に機体の高さが適正に昇降制御されないという問題があった。本発明は、土塊があっても安定した機体の昇降制御が行なえる移植機を提供することを目的とする。【解決手段】昇降装置23にて上下昇降作動する左右走行装置14を装備した機体に移植対象物を植付ける植付具28を設けた移植機において、機体進行方向に対して左右に配置された左右接地検出体36、37による圃場面の高さ検出の平均値で昇降切替部24aを切替え作動させて昇降装置23を昇降動作させる移植機。【選択図】図5
