PLANTING DEPTH CONTROLLING DEVICE AT PLANTING POSITION OF RICE TRANSPLANTER

摘要

PURPOSE: To simplify the structure and facilitate the setting of a planting depth in a rice transplanter. ;CONSTITUTION: In a rice transplanter, a planting-depth is controlled in a feedback manner using a planting-depth setting value determined by a planting-depth potentiometer 77 as an objective value and referring to the angle detected by a field surface sensor. In a planting depth controlling device at a planting position of the rice transplanter, the angle detected by the field surface sensor is adjusted by the planting-depth setting value determined by the planting-depth potentiometer 77. By this adjustment, the resultant value is made to correspond the actual inclination angle in front-and-back direction of a center float 34 independently of the planting depth. Further, a planting-depth setting motor 71 for setting the length of downward extension of the center float 34 at the planting position and a planting-depth setting device are attached on the planting depth controlling device. Accordingly, the downward extension length is controlled in a feedback manner using the planting-depth setting value as the target value and referring the value determined by the planting-depth potentiometer 77.;COPYRIGHT: (C)1995,JPO