| 摘要 |
PROBLEM TO BE SOLVED: To more surely perform the planting of seedlings by an appropriate seedling planting device and to simplify constitution required for it by more accurately maintaining the height to the ground of the seedling planting device at the time of a planting operation to a prescribed height to the ground while reducing the labor of an operator. SOLUTION: In this riding type rice transplanter provided with an automatic vertical movement control means 20B for controlling the vertical movement of the seedling planting device so as to restore the vertical swinging angleθto a target angleθo set beforehand based on detection from a float sensor S2 for detecting the vertical swinging angleθof a center float 16A, a pair of left and right mud surface height detection sensors S3 for detecting the displacement of a mud surface height at the left and right near side parts of the center float 16A to the seedling planting device are mounted to the fixed part of the seedling planting device and a target angle correction means 20C for correcting the target angleθo based on a detected value from the left and right mud surface height detection sensors S3 is equipped.
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