RIDING TYPE RICE TRANSPLANTER

摘要

PROBLEM TO BE SOLVED: To excellently perform the planting of seedlings by a seedling planting device while reducing the labor of an operator at the time of a planting operation and to simplify constitution required for it by automatically maintaining the height to the ground of the seedling planting device to a prescribed height to the ground regardless of the undulations of a field and the hardness of mud. SOLUTION: This riding type rice transplanter is provided with an automatic vertical movement control means 20C for controlling the vertical movement of the seedling planting device so as to restore the vertical swinging angleθof a grading float 16 to a target angleθo set beforehand based on a detected value from a float sensor S2 for detecting the vertical swinging angleθof the grading float 16 displaced at the time of planting operation traveling. In this case, a mud surface height detection sensor S3 for detecting the displacement of a mud surface height to the seedling planting device is equipped at the fixed part of the seedling planting device and a target angle correction means 20D for correcting the target angleθo of the grading float 16 based on the detected value from the mud surface height detection sensor S3 is equipped.