| 摘要 |
A conveyor comprises two endless conveyor belts 1, 2 arranged in parallel. The upper surface of each conveyor belt 1, 2 includes an array of belt rollers 3, each belt roller arranged to rotate with movement of the conveyor belts about an axis at an oblique angle to the longitudinal direction of the conveyor belts 1, 2. The conveyor also includes a respective drive mechanism arranged to drive each conveyor belt 1, 2. Each drive mechanism is arranged to drive the associated conveyor belt 1, 2 selectively in a forward direction and a reverse direction independently of the direction of drive of the other conveyor belt 2, 1. The axes of the belt rollers 3 are aligned such that when each conveyor belt 1, 2 is driven in the forward direction, the belt rollers 3 of the conveyor belt 1, 2 rotate about their axes to urge an object on the upper surface of the conveyor belt 1, 2 towards the other conveyor belt 1, 2. The conveyor has the advantage that an object on the upper surface of the conveyor belts 1,2 can be re-orientated and/or centralised by moving the conveyor belts 1, 2 in opposing direction and/or at different speeds, in order that the object will pass through a defined opening at the end of the conveyor. Control may be by means of a programmable logic controller and laser position sensors. |
