| 摘要 |
<p>A conveying system having a modulated speed control that is responsive to the flow of articles on the system. The conveying system includes a pair of conveyors and a spring loaded cable is mounted along one side of one of the conveyors and is capable of deflecting laterally in response to a pressure generated by an accumulation of articles on the conveyor. The cable is operably connected to a valve of a hydraulic motor which drives the second conveyor that is located upstream of the first conveyor. If a blockage occurs downstream, the articles will accumulate on the first conveyor causing the cable to flex, and flexing of the cable will operate the valve to vary the flow of hydraulic fluid to the hydraulic motor for the second upstream conveyor, thereby either decreasing the speed of the upstream conveyor or stopping operation of that conveyor. As the accumulation of articles on the first conveyor is returned to the conveying system, the cable will return to a taut condition to thereby operate the valve to correspondingly increase the speed of the hydraulic motor of the upstream conveyor.</p> |
