Conveyors system with volume sharing

• US 6,412,621 B1
• Filed: 10/21/1999
• Issued: 07/02/2002
• Est. Priority Date: 10/21/1999
• Status: Expired due to Term

• Current Assignee: Siemens Logistics LLC (Siemens AG)
• Original Assignee: Rapistan Systems Advertising Corporation (OSI Systems Incorporated)
• Inventors: Edwards, Harry T., De Vree, Ronald J.
• Primary Examiner(s): HESS, DOUGLAS A
• Application Number:
  US09/422,557
• Time in Patent Office: 985 Days
• Field of Search: 198/347.1, 198/347.4, 198/443, 198/461.1
• US Class Current: 198/347.4
• CPC Class Codes: B65G 37/02 Flow-sheets for conveyor combinations in warehouses, magazines or workshops
• CPC Class Codes: B65G 47/1492 the articles being fed from a feeding conveyor
• CPC Class Codes: B65G 47/5109 first In - First Out systems: FIFO
• CPC Class Codes: B65G 47/5145 with recirculation means
• CPC Class Codes: B65G 47/682 from a single conveyor lane consisting of one conveyor or several adjacent conveyors
• CPC Class Codes: B65G 47/684 with recirculation of articles forming a buffer

Abstract

A conveyor system and corresponding method for article volume sharing between conveyor lines includes an overflow handler in operational connection with the alignment conveyor of each conveyor line. The overflow handler receives articles positioned outside of the alignment region of the alignment conveyor and transports the articles to an alignment conveyor positioned within an adjacent conveyor line. Volume sharing between a plurality of conveyor lines increases conveyor system throughput, particularly when one or more of the conveyor lines experiences a high volume of article flow. The conveyor system includes a deflector assembly capable of deflecting articles away from the alignment region of the alignment conveyor and towards the overflow handler, and subsequently to an adjacent conveyor line, when the sortation conveyor is jammed or offline during the performance of maintenance.

Claims

1. A conveyor system comprising:

least first and second conveyor lines, each conveyor line having an alignment conveyor including a first region whereupon articles are singulated, and a second region configured to convey articles away from said first region;

each conveyor line further having a first output conveyor extending from the first region of said alignment conveyor; and

said first conveyor line having an overflow handler configured to convey articles from the second region of said alignment conveyor of said first conveyor to said second conveyor line, said first output conveyor of each said first and second conveyor lines conveying articles downstream of said alignment conveyor of said first and second conveyor lines to a downstream process, thereby defining a load sharing system.

2. The conveyor system as recited in claim 1, wherein said second overflow handler has a conveying surface, said conveying surface configured to convey articles in a direction away from, and generally perpendicular to the direction of said first region of said alignment conveyor.

3. The conveyor system as recited in claim 1, further comprising a dual line induction conveyor positioned downstream of said alignment conveyor, said second output conveyor conveying articles to said dual line induction conveyor.

4. The conveyor system as recited in claim 1, wherein said at least one conveyor line is a first conveyor line and a second conveyor line, said second output conveyor of said first conveyor line conveying articles to said alignment conveyor of said second conveyor line.

5. The conveyor system as recited in claim 1, wherein said second conveyor line has an input conveyor positioned upstream of said alignment conveyor, said second output conveyor of said first conveyor line conveying articles to said input conveyor of said second conveyor line.

6. The conveyor system as recited in claim 1, wherein said second conveyor line includes a recirculation conveyor, said recirculation conveyor conveying articles to said alignment conveyor of said second conveyor line, and wherein said second output conveyor conveys articles to said recirculation conveyor of said second conveyor line.

7. The conveyor system as recited in claim 1, wherein said alignment conveyor further comprises a first conveying surface positioned in said first region, said first conveying surface configured to singulate articles in said first region;

and

a second conveying surface positioned in said second region, said second conveying surface configured to convey articles longitudinally from said first conveying surface and towards said second output conveyor.

8. The conveyor system as recited in claim 7, wherein said first conveying surface further comprises a first plurality of rollers, said first plurality of rollers skewed towards said first region.

9. The conveyor system as recited in claim 8, wherein said second conveying surface further comprises a second plurality of rollers, said second plurality of rollers skewed towards said second output conveyor.

10. The conveyor system as recited in claim 1, wherein said first output conveyor includes a plurality of rollers skewed in a direction away from said second output conveyor.

11. The conveyor system as recited in claim 1, wherein said at least one of said first a second conveyor lines further comprises a deflector assembly positioned upstream of said alignment conveyor, said deflector assembly configured to selectively deflect articles away from said first region of said alignment conveyor.

12. The conveyor system as recited in claim 11, wherein said at least one of said first and second conveyor lines includes an input conveyor positioned upstream of said alignment conveyor, and wherein said deflector assembly is at said input conveyor.

13. The conveyor system as recited in claim 12, wherein said deflector assembly further comprises an actuator and a rotatable gate in operational connection with said actuator, wherein said rotatable gate is attached to said input conveyor.

14. The conveyor system as recited in claim 11, wherein said alignment conveyor further comprises a movable guide member positioned in said first region, said deflector assembly operably connected to said movable guide member, said deflector assembly retractably positioning said movable guide member in said second region when in said second position.

15. The conveyor system as recited in claim 1, wherein at least one of said first and second conveyor lines includes an input conveyor positioned upstream of said alignment conveyor, said input conveyor having a plurality of rollers configured to urge articles toward said first region of said alignment conveyor.

16. The conveyor system as recited in claim 1, wherein said second output conveyor is at least one peel-away conveyor.

17. A conveyor system comprising:

at least one conveyor line having an alignment conveyor including a first region whereupon articles are singulated, and a second region configured to convey articles away from said first region;

a first output conveyor extending from the first region of said alignment conveyor, wherein said alignment conveyor further comprises an input end, an output end and an article transport surface positioned between said input end and said output end, wherein said article transport surface includes a first conveying surface and a second conveying surface, said first conveying surface positioned in said first region, said first conveying surface configured to singulate articles in said first region longitudinally from said input end to said output end, said second conveying surface positioned in said second region, said second conveying surface configured to convey articles longitudinally from said input end to said output end and towards said second output conveyor, wherein said first conveying surface further comprises a first plurality of rollers, said first plurality of rollers skewed towards said first region, wherein said second conveying surface further comprises a second plurality of rollers, said second plurality of rollers skewed towards said second output conveyor, wherein each roller of said first plurality of rollers has a first coefficient of friction, wherein each roller of said second plurality of rollers has a second coefficient of friction, and wherein said first coefficient of friction is greater than said second coefficient of friction;

a second output conveyor extending from the second region of said alignment conveyor, said first output conveyor and said second output conveyor conveying articles downstream of said alignment conveyor to define a load sharing system.

18. A conveyor system comprising:

a first alignment conveyor and a second alignment conveyor, said first alignment conveyor and said second alignment conveyor each having a first region whereupon articles are singulated, and a second region configured to convey articles away from said first region;

a sortation conveyor positioned downstream of said second alignment conveyor; and

a first overflow handler configured to convey articles from said second region of said first alignment conveyor to said second alignment conveyor, wherein said first alignment conveyor and said second alignment conveyor further comprises an input end, an output end, and an article transport surface positioned between said input end and said output end, wherein said article transport surface includes a first conveying surface and a second conveying surface, said first conveying surface positioned in said first region, said first conveying surface configured to singulate articles in said first region longitudinally from said input end to said output end, said second conveying surface positioned in said second region, said second conveying surface configured to convey articles longitudinally from said input end to said output end, and away from said first region, wherein said first conveying surface further comprises a first plurality of rollers, said first plurality of rollers skewed towards said first region, wherein said second conveying surface further comprises a second plurality of rollers, said second plurality of rollers skewed away from said first region, wherein each roller of said first plurality of rollers has a first coefficient of friction, wherein each roller of said second plurality of rollers has a second coefficient of friction, and wherein said first coefficient of friction is greater than said second coefficient of friction.

19. A conveyor system comprising:

a plurality of conveyor lines, each of said plurality of conveyor lines including an alignment conveyor having a first region whereupon articles are singulated, a second region configured to convey articles away from said first region, and an output conveyor extending from said first region; and

at least one of said plurality of conveyor lines including an overflow handler, said overflow handler configured to convey articles from said second region of said alignment conveyor of said at least one of said conveyor lines to an adjacment conveyor line of said plurality of conveyor lines for load sharing between said conveyor lines, said output conveyors of said plurality of conveyor lines conveying articles to a downstream process.

20. The conveyor system as recited in claim 19, wherein said overflow handler includes at least one peel-away conveyor.

21. The conveyor system as recited in claim 20, wherein said at least one peel-away conveyor has a conveying surface configured to convey articles in a direction away from, and generally perpendicular to the direction of said first region of said alignment conveyor.

22. The conveyor system as recited in claim 19, wherein said alignment conveyor further comprises an input end, an output end and an article transport surface positioned between said input end and said output end, wherein said article transport surface includes:

a first conveying surface positioned in said first region, said first conveying surface configured to singulate articles in said first region longitudinally from said input end to said output end; and

a second conveying surface positioned in said second region, said second conveying surface configured to convey articles longitudinally from said input end to said output end, and towards said overflow handler.

23. The conveyor system as recited in claim 22, wherein said first conveying surface further comprises a first plurality of rollers, said first plurality of rollers skewed towards said first region.

24. The conveyor system as recited in claim 23, wherein said second conveying surface further comprises a second plurality of rollers, said second plurality of rollers skewed towards said overflow handler.

25. The conveyor system as recited in claim 19, wherein said at least one conveyor line of said plurality of conveyor lines further comprises at least a first conveyor line, and a last conveyor line, wherein said last conveyor line has a return conveyor operably connected to said overflow handler, said return conveyor conveying articles from said overflow handler of said last conveyor line to said alignment conveyor of said first conveyor line.

26. The conveyor system as recited in claim 19, wherein said at least one conveyor line of said plurality of conveyor lines further comprises a deflector assembly positioned upstream of said alignment conveyor, said deflector assembly configured to move between a first position and a second position, said deflector assembly deflecting articles away from said first region of said alignment conveyor when in said second position.

27. A conveyor system comprising:

plurality of conveyor lines, at least one conveyor line of said plurality of conveyor lines including an alignment conveyor and an overflow handler,

said alignment conveyor having a first region whereupon articles are singulated, and a second region configured to convey articles away from said first region; and

said overflow handler configured to convey articles from said second region of said alignment conveyor of one conveyor line of said plurality of conveyor lines to an adjacent conveyor line of said plurality of conveyor lines, wherein said overflow handler comprises at least on peel-away conveyor, wherein said at least one peel-away conveyor has a conveying surface configured to convey articles in a direction away from and generally perpendicular to the direction of said first region of said alignment conveyor, wherein said alignment conveyor further comprises an input end, an output end and an article transport surface positioned between said input end and said output end, wherein said article transport surface includes a first conveying surface and a second conveying surface, said first conveying surface positioned in said first region, said first conveying surface configured to singulate articles in said first region longitudinally from said input end to said output end, said second conveying surface positioned in said second region, said second conveying surface configured to convey articles longitudinally from said input end to said output end, and towards said overflow handler, wherein said first conveying surface further comprises a first plurality of rollers, said first plurality of rollers skewed towards said first region, wherein said second conveying surface further comprises a second plurality of rollers, said second plurality of rollers skewed towards said overflow handler, wherein each roller of said first plurality of rollers has a first coefficient of friction, wherein each roller of said second plurality of rollers has a second coefficient of friction, and wherein said first coefficient of friction is greater than said second coefficient of friction.

28. A conveyor system comprising:

a plurality of conveyor lines, wherein each conveyor line of said plurality of conveyor lines further comprises an alignment conveyor and at least one conveyor line of said plurality of conveyor lines includes an overflow handler,

each said alignment conveyor having a first region whereupon articles are singulated, and a second region configured to convey articles away from said first region; and

said overflow handler configured to convey articles from said second region of said alignment conveyor of said at least one conveyor line to an adjacent one of said conveyor lines, a sortation conveyor positioned downstream of said conveyor lines and a recirculation conveyor positioned downstream of said sortation conveyor, said recirculation conveyor conveying articles to one said alignment conveyor, and wherein said overflow handler conveys articles to said recirculation conveyor for load sharing between said conveyor lines.

29. A conveyor system comprising;

a first alignment conveyor and a second alignment conveyor, said first alignment conveyor and said second alignment conveyor each having a first region whereupon articles are singulated, and a second region configured to convey articles away from said first region;

sortation conveyor positioned downstream of said second alignment conveyor;

a first overflow handler configured to convey articles from said second region of said first alignment conveyor to said second alignment conveyor for load sharing between said alignment conveyors; and

output conveyors supplying said sortation conveyor with articles from said first regions of said first and second alignment conveyors.

30. The conveyor system as recited in claim 29, further comprising a recirculation conveyor positioned downstream of said sortation conveyor, said recirculation conveyor conveying articles to said second alignment conveyor.

31. The conveyor system as recited in claim 30, wherein said first overflow handler is configured to convey articles to said recirculation conveyor.

32. The conveyor system as recited in claim 29, further comprising a second overflow handler configured to convey articles from said second alignment conveyor downstream of said second alignment conveyor.

33. The conveyor system as recited in claim 32, further comprising a return conveyor operably connected to said second overflow handler, said return conveyor configured to convey articles from said second overflow handler to said first alignment conveyor.

34. The conveyor system as recited in claim 32, wherein said first overflow handler and said second overflow handler is at least one peel-away conveyor.

35. The conveyor system as recited in claim 34, wherein said at least one peel-away conveyor has a conveying surface configured to convey articles in a direction away from, and generally perpendicular to the direction of said first region.

36. The conveyor system as recited in claim 29, wherein said first alignment conveyor and said second alignment conveyor further comprises an input end, an output end, and an article transport surface positioned between said input end and said output end, wherein said article transport surface includes:

a first conveying surface positioned in said first region, said first conveying surface configured to singulate articles in said first region longitudinally from said input end to said output end; and

a second conveying surface positioned in said second region, said second conveying surface configured to convey articles longitudinally from said input end to said output end, and away from said first region.

37. The conveyor system as recited in claim 36, wherein said first conveying surface further comprises a first plurality of rollers, said first plurality of rollers skewed towards said first region.

38. The conveyor system as recited in claim 37, wherein said second conveying surface further comprises a second plurality of rollers, said second plurality of rollers skewed away from said first region.

39. The conveyor system as recited in claim 29, wherein at least one alignment conveyor of said first and said second alignment conveyors further comprises a deflector assembly configured to selectively deflect articles away from said first region of said alignment conveyor.

40. A method for distributing a load of articles in a conveyor system, wherein the conveyor system includes at least first and second conveyor lines, each conveyor line having an alignment conveyor, wherein the alignment conveyor has a first region and a second region said method comprising the steps of:

singulating articles positioned within the first region of the alignment conveyor and conveying articles from the first region of the alignment conveyor of the first and second conveyor lines to a downstream process; and

conveying articles positioned in the second region of the alignment conveyor of the first conveyor line to the second conveyor line for load sharing between the first and second conveyor lines.

41. The method as recited in claim 40, wherein said conveying step further comprises providing an overflow handler, said overflow handler conveying articles from the second region of the alignment conveyor of the first conveyor line to the second conveyor line.

42. The method as recited in claim 41, wherein said overflow handler further comprises at least one peel-away conveyor.

43. The method as recited in claim 41, wherein said overflow handler conveys articles from the second region of the alignment conveyor of the first conveyor line to the alignment conveyor of the second conveyor line.