| 摘要 |
PROBLEM TO BE SOLVED: To provide a device which can distinguish whether an aggregate which is dumped into an aggregate accepting hopper is gravel or sand at a point time when the aggregate is dumped. SOLUTION: An air nozzle 15 is mounted to the side of the aggregate accepting hopper 3, and an air supply unit 17 is connected to the air nozzle 15 through an air supply pipe 16. An air pressure sensor 18 is mounted to a way position to the air supply pipe 16. Furthermore, a controller 20 which determines the operation stop of an aggregate conveying conveyor 6 by distinguishing whether the aggregate 2 is the gravel or the sand on the basis of the detected value of the air pressure sensor 18 is provided. When pressurized air is discharged from the air supply unit 17 into the aggregate accepting hopper 3 through the air nozzle 15, whether the aggregate 2 is the gravel or the sand is distinguished by the controller 20 on the basis of the detected value detected by the air pressure sensor 18. COPYRIGHT: (C)2010,JPO&INPIT
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