Grinding type vertical grain polishing machine

A grinding type vertical grain polishing machine comprising:

• a bran removing wire-mesh tube erected in a top-bottom direction;
• a main shaft rotatably provided inside of the bran removing wire-mesh tube;
• a grinding type grain cleaning roll member integrally including a large number of grinding type grain cleaning rolls axially supported by the main shaft;
• a grain cleaning chamber formed between the bran removing wire-mesh tube and the grinding type grain cleaning roll member;
• and
• a bran removing chamber and a resistor apparatus each formed on an outer circumferential side of the bran removing wire-mesh tube, wherein the resistor apparatus includes:
• a plurality of support pillars erected around the bran removing wire-mesh tube;
• and a resistor and an urging apparatus provided for each of the support pillars,
• the resistor has a leading end surface that approaches an outer circumferential surface of the grinding type grain cleaning roll member inside of the grain cleaning chamber, to thereby impart a resistance for suppressing movement to grains moving along with rotation of the grinding type grain cleaning roll member,
• a position of the leading end surface is adjustable so as to be closer to or farther from the outer circumferential surface of the grinding type grain cleaning roll member in a radial direction of the grinding type grain cleaning roll member,
• the resistor is always urged by the urging apparatus toward the grinding type grain cleaning roll member, and
• when pressing force of the grains exceeds the urging by the urging apparatus, the resistor is retracted from the grinding type grain cleaning roll member against the urging.