VEHICLE HEIGHT SENSOR FOR TRANSPLANTER

摘要

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.