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A conveyor pulley is a mechanical device used to change the direction of the belt in a conveyor system, to drive the belt, and to tension the belt. Modern pulleys are made of rolled shells with flexible end disks and locking assemblies. Early pulley engineering was developed by Josef Sitzwohl in Australia in 1948 and later by Helmuth Lange and Walter Schmoltzi in Germany. ==References== 1. Josef Sitzwohl, 1948 (Welded Conveyor Pulleys ) 2. Helmut Lange, 1963 Hannover University Ph.D. Thesis First to formalize the Fourier series expansion for the triaxial state of stress for pulley shells and connected end disks. 3. Walter Schmoltzi, 1974 a disciple of Lange - help understand the locking device contact stress field and connection between end disk and shell. SCHMOLTZI, W, "Designing Drums with transverse Shafts for Belt Conveyors". Thesis for Doctorate in Engineering, Hannover, 1974. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Conveyor pulley」の詳細全文を読む スポンサード リンク
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