Residual grain of the discharge device in the automatic sorting weighing machine of grain

摘要

PURPOSE:To perfectly discharge the residual grain in a moving classifying cylinder by providing an inverter control circuit for increasing and decreasing the rotational speed of a spiral rotary body corresponding to the amount of the grain flowing in a moving classifying apparatus and providing a circuit for changing over rotation to high speed rotation regardless of the inflow amount of grain to said control circuit. CONSTITUTION:The inflow amount of the grain flowing in a moving classifying apparatus is detected by a detection control circuit 14 and the rotational speed of a spiral rotary body is controlled so as to increase and decrease corresponding to the inflow amount of grain. Therefore, a proper amount of grain is always stagnated in the moving classifying apparatus and desired classified grain is obtained. When the supply of grain to the moving classifying apparatus is stopped at the time of the finish of classifying and weighing work, the spiral rotary body is rapidly brought to low speed rotation or stopped in rotation by an inverter control circuit 13. Therefore, residual grain is generated in a classifying net cylinder. Then, when a change-over switch 17 is changed over to a high speed rotation setting circuit 15, the inverter control circuit 13 becomes a high speed rotary state and the spiral rotary body is rotated at a high speed to perfectly discharge the residual grain in the classifying net cylinder.