METHOD FOR CONTROLLING YIELD OF AUTOMATIC RICE MILLING MACHINE AND APPARATUS THEREFOR

摘要

PROBLEM TO BE SOLVED: To make it possible to exactly measure the weight of rice grains after rice milling and to execute rice milling uniformly from an initial period to end period of charging by executing weighing every time that a rice milling treatment ends and repeating the rice milling stage when a computed yield does not attain a target yield. SOLUTION: The milled rice charged from a return cup 104 is already subjected to the rice milling treatment and its resistance value is maintained before the treatment of the milled rice not subjected to the treatment is completed. The driving of a main motor 206 for rice milling is stopped and the inclination of a supply cup 44 is released by driving of a main drive motor 290 for tilting and is moved to a weighing position by driving of a main motor 40A after lapse of the prescribed time. The weighing is executed and the weight Wn of the polished rice is computed. The previously measured raw material weight W0 is read out. The yield Bn =(Wn -W0 )×100 is computed and the target yield A is read out. Whether the yield Bn is within, for example, >=0.5% or not is decided and the treatment is ended in case of affirmative decision. The treatment is executed again to repeat the rice milling treatment in the case the decision is no.