Patent Application
20050155840
The present invention relates to conveyors and more particularly to conveyors that have at spaced locations along the conveyors means enabling removal of items being conveyed.
The packaging industry, particularly in the packaging of snack foods, use conveyors to transport product to be packaged to spaced packaging locations. At each location there is typically a weighing machine and a packaging machine that places weighed batches of product in bags.
The conveyors needs to feed sufficient product to each packaging machine. Accordingly, at spaced locations along the conveyor product is removed and delivered to the packaging machine. Typically, the product is removed by having the conveyors provided with gates that are opened and closed and through which the product is removed is from the conveyor and delivered to a further conveyor extending to the associated packaging machine. Typically, these further conveyors are transverse of the primary conveyor.
A known conveyor is a slip conveyor. A slip conveyor has a conveyor surface that is vibrated longitudinally to transport product longitudinally of the conveyor. Where a number of conveyor surfaces are provided, it is known to displace the conveyor surfaces longitudinally to provide a gap between adjacent surfaces through which product is delivered.
The above discussed conveyor arrangements have a number of disadvantages including insufficient control of the delivery of product to the transverse conveyors and problems in respect of cleaning.
It is the object of the present invention to overcome or substantially ameliorate the above disadvantage.
There is disclosed herein a conveyor including:
a base;
a first conveyor segment having a longitudinally extending conveyor surface upon which items to be conveyed are longitudinally transported, the segment having an upstream end and a downstream end, the upstream end being provided to receive said item;
a second conveyor segment mounted on the base, said second segment having a longitudinally extending conveyor surface upon which the items to be conveyed are longitudinally transported, the second segment having an upstream end and a downstream end, with said second segment being mounted relative to said first segment so that items leaving the first segment downstream end are delivered to the second segment upstream end; and
wherein said segments are mounted to provide for relative lateral displacement between the first segment downstream end relative to the second segment upstream end so that a desired quantity of said items pass from said first segment to said second segment, with a further desired quantity of said items being removed from said conveyor as a result of relative displacement between the first segment downstream end and the second segment upstream end to thereby provide said lateral relative displacement.
Preferably, both conveyor surfaces are upwardly facing, and at least one of said segments is mounted for angular movement to provide for relative angular movement between the first segment downstream end and the second segment upstream end.
Preferably, the first segment downstream end is located above the second segment upstream end.
Preferably, at least one of said segments is pivotally mounted so as to be movable in a generally horizontal plane to change the relative position of the first segment downstream end with respect to the second segment upstream end.
Preferably, there is further provided a transverse conveyor positioned below said first segment downstream end and said second segment upstream end so that items leaving said first segment downstream end and not delivered to said second segment upstream end are delivered to said transverse conveyor.
Preferably, each segment is a slip conveyor.
Preferably, said segments are linear conveyors.
Preferably, said first segment is pivotally moved in a generally horizontal plane relative to said second segment.
A preferred form of the present invention will now be described by way of example with reference to the accompanying drawings wherein:
In the accompanying drawings there is schematically depicted a linear slip conveyor 10 that delivers product to a plurality of transverse conveyors or chutes 11. Typically, if the conveyor 10 is used to transport snack foods, the product is delivered from the transverse conveyors 11 to a packaging machine.
The conveyor 10 includes a plurality of conveyor segments 12 that are mounted on a base 13. The base 13 is longitudinally extending so as pass beneath each of the segments 12. Each segment 12 includes an upstream end 15, and a downstream end 16 between which a generally horizontal conveyor surface 17 passes. Product is located on each surface 17 so as to be conveyed thereby in the direction of the arrows 18.
Preferably each segment 12 is pivotally mounted on the base 13 by means of a shaft 14 at or adjacent the upstream end 15. By this, the arrangement each downstream end 16 can be laterally displaced without any significant displacement of the upstream end 15 of that segment 12. Associated with each segment 12 is a slide member 19 upon which the associated segment slidably rests. The base 13 is supported on a plurality of pivotally mounted arms 20, with the base caused to reciprocate in the direction of the arrow 21 so that the conveyor 12 operates as a slip conveyor.
The segments 12 overlap so that the downstream end 16 of each segment 12 is located above the upstream end 15 of the next adjacent downstream segment 12.
Attached to each segment 12 is a motor 21 such as an air or hydraulic cylinder. Operation of each motor 22 causes pivoting of the associated segment 12 angularly in the direction of the arcuate arrows 23. Pivoting of each segment 12 is about a generally vertical axis 24 provided by the respective shaft 14. This angular movement is further provided by each segment 12 being slidably supported on its respective slide member 19.
By operation of the motors 22, the alignment of each overlapping downstream end 16 with respect to its associated upstream end 15 can be adjusted. By displacing each downstream end 16 laterally relative to its associated upstream end 15, product is allowed to leave the downstream end 16 and be delivered to the adjacent transverse conveyor 11. The greater the degree of misalignment the more product that is delivered to the associated transverse conveyor 11. Accordingly, in the above described preferred embodiment, the delivery of product to the transverse conveyors can be better controlled. This is at least partly due to the motors 21 being operable to “continuously” vary the alignment of the ends 15 and 16.
In an alternative embodiment the downstream upstream end 15 could be laterally displaced rather than the downstream end 16.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2003906367 | Nov 2003 | AU | national |
