| 摘要 |
PROBLEM TO BE SOLVED: To provide a grain-discharging device which can lighten a discharging auger, reduce vibrations, reduce loads on attaching portions and supporting portions, improve durability, smoothen the transportation of grains, improve the certainty of the transportation, suppress clogging, smoothen expansion and contraction, lower costs, reduce the husking of the grains during their transportation, and improve abrasion resistance. SOLUTION: This grain-discharging device is characterized by having a laterally discharging auger 6 comprising a fixed auger 7 connected to a vertical grain-elevating device 5 for discharging the grains from a grain tank 4 and a movable auger 8 extendably attached to the fixed auger 7, disposing a fixed auger screw 10 not changing its length in spite of the extension or contraction of the above-described movable auger 8 and an extendable screw 20 changing its length in response to the extension or contraction of the above-described movable auger 8 in the laterally discharging auger 6, forming the extendable screw 20 by disposing a plurality of movable screw pieces 26 in the axial direction of a transmission shaft member 28, and forming a portion or all portions of the movable screw pieces 26 from one or more synthetic resins. Each of the movable screw pieces comprises a movable member 21 movably inserted in the transmission shaft member 28, an engaging member 21 for moving the movable member 21, and a moving side spiral blade 25 disposed on the movable member 21.
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