| 摘要 |
<p>A workpiece moving machine comprising: an elongate frame with an endless belt mounted on the frame and extending between the ends of the frame. A plurality of trolleys are slidably mounted on the frame for movement along the frame. Each trolley has a clamp for selectively holding a workpiece to the trolley. A first clutch on each trolley selectively connects the trolley to one run of the belt to move the trolley along the frame in one direction and a second clutch on each trolley selectively connects the trolley to the other run of the belt to move the trolley along the frame in the opposite direction. A brake on each trolley selectively brakes the trolley to the frame to prevent its movement along the frame.</p> |
