| 摘要 |
PURPOSE:To easily perform replacement work of a shaft and a sprocket, by providing stepped parts in the shaft, mounted between bearing members, while clearances between said stepped parts and internal ends of the bearing members. CONSTITUTION:When a driving shaft 16 is assembled, first a driving sprocket 6 is fixed to a large contour part 16b of the driving shaft 16, next a bearing member 14 is fitted to a small contour part 16a. And the shaft is inserted from the between said plates 13, securing the bearing members 14 to the side plates 13 by bolts 15, thereafter the driving shaft 16 is stopped to the bearing members 14 by tightening bolts 17. Next, when the driving shaft 16 and the driving sprocket 6 are replaced due to wearing, the replacement work, first removing a chain next the bolts 15, 17, takes out to the bottom an integral unit of the driving shaft 16, driving sprocket 6 and the bearing members 14 by moving the bearing member 14 to the inside till it is adapted to a stepped part 16d along the small contour part 16a of the driving shaft 16.
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