PROBLEM TO BE SOLVED: To provide a vehicle height sensor for a transplanter capable of planting a young rice plant at an accurate depth by adjusting the height of a machine body of the transplanter with respect to a top face of a ridge.SOLUTION: In a transplanter comprising: driving wheels 12 at both sides of a machine body 1 over a ridge U a young rice plant planting part 10 in a lower part of the machine body 1 for planting a young rice plant in the ridge and an elevation mechanism R for separately controlling heights of both driving wheels 12 to maintain the machine body 1 in a horizontal state and vertically moving the machine body 1 in such a manner that the young rice plant planting part 10 reaches a planting portion of the ridge, a vehicle height sensor comprises: an operation arm 2 located in front of the young rice plant planting part 10 in a lower part of the machine body 1, and in which a base end part is provided successively to an interlock mechanism 9 for operating the elevation mechanism R and a tip end part is projected backward and roller shafts 5 and 6 including rollers 3 and 4 at both left and right sides and pivoted on the tip end part of the operation arm 2 by a roller shaft pivot part 7 in the center in such a manner that the left and right rollers 3 and 4 are simultaneously brought into contact with a top face of the ridge U and freely spread in a vertical direction in accordance with a lateral height difference of the top face of the ridge.COPYRIGHT: (C)2014,JPO&INPIT【課題】畝の上面に対する移植機の機体の高さを調節して正確な深さに苗を植えることが可能となる移植機用車高センサを提供する。【解決手段】機体1の両側に畝Uを跨ぐ駆動輪12と、該機体1の下部に苗を畝に植え付ける苗植付け部10と、両駆動輪12の高さを別々に制御して該機体1を水平に維持させると共に該苗植付け部10が畝の植え付け部位に到達するように機体1を昇降させる昇降機構Rとを備えた移植機において、機体1下部の前記苗植付け部10より前方にあって、前記昇降機構Rを作動させる連動機構9に基端部を連設すると共に先端部を後方に向けて突出させた操作アーム2と、左右両側にローラ3、4を備え、該左右のローラ3、4が畝Uの上面に同時に接触して畝上面の左右高低差に応じて上下擺動自在となるように、中央のローラ軸枢支部7で前記操作アーム2の先端部に枢支されたローラ軸5、6とから構成される。【選択図】 図3
