| 摘要 |
PROBLEM TO BE SOLVED: To efficiently remove dust generated in a lift-conveying tower. SOLUTION: Dust collecting holes 29 and a vent passage 27 communicated to the dust collecting holes 29 are provided in a spiral body 11 of a pachinko ball lift-conveying device constituted to lift-convey pachinko balls by rotation of the spiral body 11 and frictional force by a friction material 15 inside the lift-conveying tower 5, so as to be connected to a dust collector 62. The dust generated in the tower 5 is suction-removed into the dust collector 62 through the dust collecting holes 29 and the vent passage 27 of the spiral body 11 by this constitution. Since the dust collecting holes are provided in the spiral body 11, the dust separated from the pachinko ball is quickly suction-removed from the dust collecting holes near-by to enhance dust collecting efficiency.
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