Compact article unscrambler

• US 6,269,933 B1
• Filed: 08/10/1998
• Issued: 08/07/2001
• Est. Priority Date: 03/15/1996
• Status: Expired due to Fees

• Current Assignee: Dematic Corporation
• Original Assignee: Mannesmann Dematic Rapistan Corp. (Siemens AG)
• Inventors: Schuitema, Dennis J., LeMay, Curtis E., DeVree, Ronald J.
• Primary Examiner(s): Ellis, Christopher P.
• Assistant Examiner(s): RIDLEY, RICHARD W L
• Application Number:
  US09/131,817
• Time in Patent Office: 1,093 Days
• Field of Search: 198/443, 198/446, 198/370.1, 198/370.07
• US Class Current: 198/446
• CPC Class Codes: B65G 2201/0244 Bottles
• 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 compact article singulation and accumulation conveyor includes a receiving portion which receives articles in random order including clusters of side-by-side articles and a discharge portion from which articles are discharged in a single file singulated stream. A first conveying surface transports articles longitudinally from the receiving portion to the discharge portion. A recirculating bed removes side-by-side articles from a downstream portion of the first conveying surface to an upstream portion of the first conveying surface. The recirculating bed is made up of at least one peel-away conveyor having a second conveying surface adapted to move side-by-side articles laterally off the first conveying surface, at least one coupling conveyor having a third conveying surface adapted to move articles from the second conveying surface upstream and at least one return conveyor having a fourth conveying surface adapted to move articles from the third conveying surface to the first conveying surface. Each of the conveying surfaces may be defined by the upper surfaces of a plurality of powered rollers or traveling belts. Clusters of articles tend to recirculate around the recirculation bed and the first conveying surface and provide contact accumulation thereon as individual articles of the cluster are pulled away along the first conveying surface. An output section diverts packages having a width transverse the direction of conveyor travel which is greater than a particular dimension, rotates diverted packages, and returns the rotated packages to the conveyor.

Claims

1. A package singulation conveyor comprising:

a conveying surface traveling in a particular direction;

a diverting surface having at least a portion extending above said conveying surface and traveling upwardly and away from said conveying surface in a direction generally normal to said particular direction;

a radial belt turn conveyor; and

wherein packages traveling along said conveying surface having a portion extending to said diverting surface will be diverted from said conveying surface by said diverting surface to said radial belt turn conveyor, said diverting surface being defined by a rotating cylinder, said rotating cylinder being inclined with an end upstream with respect to said particular direction being lower than an opposite end thereof, and said belt turn conveyor rotating said packages and returning said packages to said conveying surface.

2. The package singulation conveyor in claim 1 including a vertical guide surface spaced across said conveying surface from said diverting surface a particular distance wherein a package having a lateral dimension transverse said direction which is at least as great as said particular distance will be diverted.

3. The package singulation conveyor in claim 1 having a conveyor downstream of said conveying surface and having another conveying surface with a width that is at least as great as said particular distance.

4. The package singulation conveyor in claim 1 including a high friction lagging on said diverting surface.

5. The package singulation conveyor in claim 1 wherein said diverting surface has a coefficient of friction which is higher than the coefficient of friction of said conveying surface.

6. The package singulation conveyor according to claim 1, wherein said conveying surface includes an upstream portion with respect to said diverting surface and a downstream portion with respect to said diverting surface, said belt turn conveyor diverting said packages to said upstream portion of said conveying surface.

7. The package singulation conveyor according to claim 1, wherein said conveying surface includes an upstream portion with respect to said diverting surface and a downstream portion with respect to said diverting surface, said belt turn conveyor directing said packages to said downstream portion of said conveying surface.

8. A method of removing from a conveying surface side-by-side packages and any package having a lateral dimension with respect to the direction of travel of said conveying surface which exceeds a particular dimension, comprising:

providing a vertical guide surface adjacent one side of the conveying surface and a diverting device laterally spaced from said guide surface a distance substantially equal to the greatest lateral package dimension transverse the direction of travel of the conveying surface that is to travel downstream of the conveying surface, wherein said diverting surface has a substantially horizontal surface that engages the articles and moves laterally of said conveying surface;

conveying packages along the conveying surface;

diverting off the conveying surface any packages having any portion contacting said diverting device;

rotating packages diverted from the conveying line and conveying the rotated packages to a package unscrambler;

unscrambling the packages with the unscrambler; and

returning the rotated and unscrambled packages to the conveying surface.

9. The method of conveying packages in claim 8 including returning the rotated packages to the conveying surface upstream of said diverting device.

10. The method of conveying packages in claim 8 wherein said diverting device operates on the lateral dimension of packages.

11. The method of conveying packages in claim 10 including providing a vertical guide surface adjacent the conveying surface and a diverting device laterally spaced from said guide surface substantially equal to the greatest lateral dimension transverse the direction of travel of the conveying surface package that is not to be removed from the conveying surface and diverting off the conveying surface packages having any portion contacting said diverting device.

12. A method of removing from a conveying surface side-by-side packages and any package having a lateral dimension with respect to the direction of travel of said conveying surface which exceeds a particular dimension, comprising:

providing a vertical guide surface adjacent one side of the conveying surface and a diverting device laterally spaced from said guide surface a distance substantially equal to the greatest lateral package dimension transverse the direction of travel of the conveying surface that is to travel downstream of the conveying surface, wherein said diverting surface has a substantially horizontal surface that engages the articles and moves laterally of said conveying surface, and said diverting device including at least a portion extending above said conveying surface;

conveying packages along the conveying surface;

diverting off the conveying surface any packages having any portion contacting said diverting device; and

rotating packages diverted from the conveying line and returning the rotated packages to the conveying surface.

13. The method of removing packages in claim 12 including returning the rotated packages to the conveying surface upstream of said diverting device.

14. The method of removing packages in claim 12 including returning the rotated packages to the conveying surface downstream of said diverting device.

15. The method of conveying packages in claim 12 including returning the rotated packages to the conveying surface downstream of said diverting device.

16. The method of conveying packages in claim 12 wherein said diverting device operates on the center of gravity of packages.

17. A conveying apparatus comprising:

a conveying surface which conveys packages in a direction;

a diverting device positioned along said conveying surface to divert packages having a lateral dimension transverse the direction of travel of said conveying surface which is greater than or equal to a particular dimension;

a rotating device which rotates diverted packages approximately one quarter turn and then returns rotated packages to said conveying surface, and said rotating device being configured to return rotated packages upstream said diverting device; and

a package unscrambler upstream of said diverting device wherein said rotating device returns rotated packages to said unscrambler.

18. The conveying apparatus in claim 17 wherein said rotating device is a belt turn conveyor.

19. The conveying apparatus in claim 18 wherein said diverting device includes a diverting surface positioned above said conveying surface.

20. The conveying apparatus in claim 19 including a vertical guide surface extending in said direction and wherein said diverting device is positioned from said guide surface said particular dimension.

21. The conveying apparatus in claim 20 wherein said belt turn conveyor includes a belt and at least two support rollers at opposite ends of said belt and wherein said diverting device is one of said ends.

22. The conveying apparatus in claim 18 wherein said belt turn conveyor includes a belt and at least two support rollers at opposite ends of said belt and wherein said diverting device is one of said ends.

23. A conveying apparatus, comprising:

conveying means for conveying packages in a particular direction, said conveying means having a conveying surface;

diverting means for diverting from said conveying means packages having a dimension transverse said particular direction which is greater than a particular dimension, said diverting means having a diverting surface extending above said conveying surface;

rotating means for rotating packages diverted by said diverting means approximately one quarter turn;

package unscrambling means for unscrambling packages rotated by said rotation means; and

means for returning rotated and unscrambled packages to said conveying means.

24. The conveying apparatus according to claim 23, further comprising:

guide means extending in said particular direction along said conveying means; and

wherein said diverting means is spaced from said guide means a particular distance wherein packages having a dimension transverse said direction which is greater than said particular distance will be diverted by said diverting means off said conveying means.

25. A package singulation conveyor comprising:

a conveying surface traveling in a particular direction;

a diverting surface having at least a portion extending above said conveying surface and traveling upwardly and away from said conveying surface in a direction generally normal to said particular direction;

a radial belt turn conveyor, said belt turn conveyor including said diverting surface; and

wherein packages traveling along said conveying surface having a portion extending to said diverting surface will be diverted from said conveying surface by said diverting surface to said radial belt turn conveyor, and said belt turn conveyor rotating said packages and returning said packages to said conveying surface.

26. The package singulation conveyor according to claim 25, wherein said belt turn conveyor includes a diverter, said diverter including said diverting surface.

27. The package singulation conveyor according to claim 26, wherein said diverter comprises a diverting cylinder.

28. The package singulation conveyor according to claim 27, wherein said diverting cylinder is inclined with an end upstream with respect to said particular direction being lower than an opposite end thereof.

29. The package singulation conveyor according to claim 25, wherein said belt turn conveyor includes a belt, said belt providing said diverting surface.

30. A package singulation conveyor comprising:

a conveying surface traveling in a particular direction;

a rotating device;

a substantially horizontal diverting surface that engages and has at least a portion extending above said conveying surface and traveling away from said conveying surface in a transverse direction generally normal to said particular direction;

a diverter comprising a cylinder, said cylinder being inclined with an end upstream with respect to said particular direction being lower than an opposite end thereof, and said diverting surface being provided by said diverter; and

wherein packages traveling along said conveying surface having a portion extending to said diverting surface will be diverted from said conveying surface by said diverting surface to said rotating device.

31. The package singulation conveyor according to claim 30, further comprising a vertical guide surface, said vertical guide surface spaced from said diverting surface across said conveying surface a particular distance wherein a package having lateral dimension in said transverse direction in which is at least as great as said particular distance will be diverted by said diverting surface to said rotating device.

32. The package singulation conveyor according to claim 31, further comprising a guide rail, said guide rail including said vertical guide surface.

33. The package singulation conveyor according to claim 30, wherein said rotating device comprises a belt turn conveyor.

34. The package singulation conveyor according to claim 33, wherein said belt turn conveyor comprises an approximately 90°

belt turn conveyor.

35. The package singulation conveyor according to claim 30, wherein said conveying surface includes an upstream portion relative to said diverting surface and a downstream portion relative to said diverting surface, said rotating device rotating said packages and directing said packages to said upstream portion.

36. The package singulation conveyor according to claim 30, wherein said conveying surface includes an upstream portion relative to said diverting surface and a downstream portion relative to said diverting surface, said rotating device rotating said packages and directing said packages to said downstream portion of said conveying surface.

37. The package singulation conveyor according to claim 30, wherein said rotating device rotates said packages approximately one quarter turn and returns said packages to said conveying surface.

38. A package singulation conveyor comprising:

a conveying surface traveling in a particular direction;

a rotating device, said rotating device comprising a belt turn conveyor;

a generally horizontal diverting surface traveling away from said conveying surface in a transverse direction generally normal to said particular direction; and

wherein packages traveling along said conveying surface having a lateral dimension transverse said particular direction which is greater than or equal to a particular dimension are engaged and diverted from said conveying surface by said diverting surface to said rotating device, and said rotating device rotating said packages such that their lateral dimension is generally aligned with said particular direction and returning said rotated packages to said conveying surface.

39. The package singulation conveyor according to claim 38, wherein said belt turn conveyor comprises a radial belt turn conveyor.

40. The package singulation conveyor according to claim 39, wherein said belt turn conveyor includes said diverting surface.

41. The package singulation conveyor according to claim 40, wherein said belt turn conveyor includes a belt, said belt providing said diverting surface.

42. The package singulation conveyor according to claim 41, wherein said belt turn conveyor further includes a plurality of rollers, said belt being rotatably supported by said plurality of rollers.

43. The package singulation conveyor according to claim 38, further comprising a diverter, said diverting surface being provided by said diverter.

44. The package singulation conveyor according to claim 38, wherein said diverting surface includes a high friction surface.

45. The package singulation conveyor according to claim 38, wherein said conveying surface includes an upstream portion relative to said diverting surface and a downstream portion relative to said diverting surface, said rotating device rotating said packages and directing said packages to said upstream portion.

46. The package singulation conveyor according to claim 38, wherein said conveying surface includes an upstream portion relative to said diverting surface and a downstream portion relative to said diverting surface, said rotating device rotating said packages and directing said packages to said downstream portion of said conveying surface.

47. The package singulation conveyor according to claim 38, wherein said rotating device rotates the packages approximately one quarter turn and then returns said packages to said conveying surface.

48. The package singulation conveyor according to claim 43, wherein said diverter comprises a cylinder.

49. A package singulation conveyor comprising:

a conveying surface traveling in a particular direction;

a rotating device;

a diverter comprising a cylinder, said cylinder being inclined with an upstream end with respect to said particular direction being lower than an opposite end thereof, said diverter providing a generally horizontal diverting surface traveling away from said conveying surface in a transverse direction generally normal to said particular direction; and

wherein packages traveling along said conveying surface having a lateral dimension transverse said particular direction which is greater than or equal to a particular dimension are engaged and diverted from said conveying surface by said diverting surface to said rotating device, and said rotating device rotating said packages such that their lateral dimension is generally aligned with said particular direction and returning said rotated packages to said conveying surface.