| 摘要 |
PROBLEM TO BE SOLVED: To prevent clogging in an extraction trough and a spiral lifting cylinder even in a case where an operator is unaware of a vessel such as a bag body placed at the end of the extraction trough being filled with fine particles thereby to avoid a spiral shaft, belts or other parts being damaged. SOLUTION: An outlet 20 is opened at the upper part of the lifting cylinder of a spiral lifting unit in which a spiral shaft 18 is fitted rotation-free in a vertically stood lifting cylinder 17, and a spring plate 21 is fixed to a portion corresponding to the above extraction outlet 20 in the form of lacking the spiral of the spiral shaft, and the cylindrical extraction trough 22 is installed continuously onto the outlet diagonally toward downward at the side of a frame body 1 of the classifier. An overflow port 23 is opened in the upper surface of the inclination of the above extraction trough and a lid 24 hinged at its upside to the overflow port so as to open/close freely toward outward and to close normally by its weight is provided. COPYRIGHT: (C)2006,JPO&NCIPI
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