POWDER AND GRAIN FORCE FEED SUPPLY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a force feed supply device for surely preventing a backflow of powder and grain by pressurized air with a simple structure and a mechanism. SOLUTION: This force feed supply device is constituted so as to exhaust the pressurized air in an intermediate chamber 30 to a device external part via an exhaust filter 14 by sending the pressurized air into a housing chamber 11 by opening a first opening-closing valve 20 in a state of closing a second opening-closing valve 40 after performing force feed chamber replenishing operation for supplying the powder and grain in the intermediate chamber 30 to a force feed chamber 50 by opening the second opening-closing valve 40 in a state of closing the first opening-closing valve 20 when a low level detecting means 51 detects a low level state. This force feed supply device performs intermediate chamber replenishing operation for discharging and supplying the powder and grain stored in a weighing vessel 12 to the intermediate chamber 30 and weighing vessel supply operation for receiving a prescribed quantity of powder and grain in the weighing vessel 12 from the external part in a state of closing at least the first opening-closing valve 20. COPYRIGHT: (C)2004,JPO&NCIPI