| 摘要 |
PURPOSE:To switch the amount of supply under simple sequence control by switching one device among three modes of large supply, small supply, and extremely small supply. CONSTITUTION:When an opening/closing plate 11 is opened and a shaft 3 is rotated by a motor M1, a body to be weighed which is thrown in a hopper 2 is sent by a large supply screw 4 and supplied to a weighing machine in large supply mode through a large supply discharge port 6 and a chute 8. When a discontinuous part is put between screws 5 and 4, the body to be weighed is sent to a small supply screw 5 as well and no error is generated. When the discharge port 6 is closed with an air cylinder 12 and the opening/closing plate 11, it is sent to the screw 5 in this driving state and supplied in small supply mode from a small supply discharge port 7. Then when the motor M1 is stopped and a hydraulic cylinder 13 is extended, a carriage 14 moves on a base 16 through wheels 15 and a shaft 3 coupled through a speed reducer 17 is forced into a case 1 at an extremely slow speed along bearings 18 and 19. Then, the screws 4 and 5 move without rotating and the screw 5 supplies the body to be weighed from an extremely small supply discharge port 7.
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