| 摘要 |
<p>PURPOSE:To make it possible to drive an endless conveying belt without effection of the vertical motion of a drive roller by providing a power transmitting means for setting the drive roller on the driven side, on an elevating bed holding the drive roller. CONSTITUTION:When a motor 37 is operated, a drive shaft 26 is rotated through the intermediary of gears 38, 39 so as to drive conveyer belts 8, 9. Since a worm 34 in a power transmitting mechanism 35 on an elevating bed 15 is fitted on the drive shaft 26, rotatably therewith and movable in the axial direction, it may be moved to any position in association with the vertical motion of the elevating bed 15. Further, it may receives the rotation of the drive shaft at any position to which it is moved. Further, since the rotation of the worm is transmitted to a worm wheel 33 which moves together in association with the vertical motion of the elevating bed 15, so that drive rollers 13, 14 are driven, no relative movement between the drive and driven sides of the power transmitting mechanism 35 occurs in association with the vertical movement of the elevating bed 15. Accordingly, the drive rollers 13, 14 are always rotated stably, without effection of the movement of the elevating bed 15.</p> |
