| 摘要 |
PROBLEM TO BE SOLVED: To securely transfer a conveyed object such as excavated much conveyed with a belt without dropping it to both sides of a booster unit. SOLUTION: This booster unit 11 for a belt conveyer is generally composed of an intermediate driving pulley 12, a belt pressing pulley 13 arranged on the lower tail end side of the intermediate driving pulley 12, a driving mechanism 14 used as a driving means for rotating and driving the intermediate driving pulley 12, and a transmission mechanism 15 interlaid between the intermediate driving pulley 12 and the driving mechanism 14. The intermediate driving pulley 12 is so formed into a Japanese hand drum-like shape that its cross-sectional diameter at the central position of the belt is set smaller than those at both edge positions of the belt.
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