Singulating conveyor

• US 20030221932A1
• Filed: 05/30/2002
• Published: 12/04/2003
• Est. Priority Date: 05/30/2002
• Status: Active Grant

• Current Assignee: Laitram LLC
• Original Assignee: Laitram LLC
• Inventors: Costanzo, Mark B.
• Granted Patent: US 6,758,323 B2
• Time in Patent Office: Days
• US Class Current: 193/35MD
• CPC Class Codes: B65G 13/10 Switching arrangements
• CPC Class Codes: B65G 17/08 the surface being formed by the traction element
• CPC Class Codes: B65G 17/24 comprising a series of rollers which are moved , e.g. over a supporting surface, by the traction element to effect conveyance of loads or load-carriers
• CPC Class Codes: B65G 17/32 Individual load-carriers
• CPC Class Codes: B65G 17/40 Chains acting as load-carriers
• CPC Class Codes: B65G 2201/02 Articles
• CPC Class Codes: B65G 47/24 orientating the articles
• CPC Class Codes: B65G 47/30 during transit by a series of conveyors
• CPC Class Codes: B65G 47/682 from a single conveyor lane consisting of one conveyor or several adjacent conveyors

Abstract

A singulating conveyor for aligning a mass of conveyed articles into a single file. The conveyor includes a first centering conveying zone in which one or more roller-top conveyor mats direct conveyed articles sidewise toward a side or the center of the zone. The rollers on which the articles ride rotate about axes oblique to the conveying direction to provide a sidewise component of motion to the articles. The articles are received downstream in a second separation zone, in which the articles are sped up in the conveying direction to separate them into a single file. The conveyor mats can be realized as endless conveyor belts in motion or as stationary mats overlying a moving belt contacting and rotating the rollers.

Claims

1. A conveyor suitable for singulating articles conveyed along a carryway, comprising:

a first conveyor mat extending in a lengthwise direction from a first end to a second end, in a widthwise direction from a first side to a second side, and in thickness from a top surface to a bottom surface;

the first conveyor mat forming a plurality of cavities through the thickness of the first conveyor mat and opening onto the top surface and the bottom surface;

a roller disposed in each of the cavities with salient portions of each roller extending from the cavity past the top surface and the bottom surface;

each roller being arranged to rotate about an axis oriented between the lengthwise and the widthwise directions;

a roller bearing surface disposed along the bottom surface of the first conveyor mat and in contact with the salient portion of the rollers extending past the bottom surface;

wherein relative motion between the first conveyor mat and the roller bearing surface causes the rollers to rotate and to provide a sidewise component of motion to articles conveyed atop the rollers along the top surface of the first conveyor mat; and

a second conveyor mat adjacent the first conveyor mat arranged to receive articles from the first conveyor mat and to convey the articles at an increased speed in the lengthwise direction to increase the separation between conveyed articles along the carryway.

2. A conveyor as in claim 1 comprising a moving belt forming the roller bearing surface.

3. A conveyor as in claim 1 wherein the second conveyor mat includes a plurality of rollers disposed in cavities formed in the second conveyor mat and opening onto top and bottom surfaces of the mat, salient portions of the rollers extending from the cavities past the top and bottom surfaces, wherein the rollers are arranged in the cavities to rotate about a widthwise axis of the second conveyor mat.

4. A conveyor as in claim 3 further comprising a moving belt positioned beneath the second conveyor mat and in contact with the salient portions of the rollers extending from the cavities past the bottom surface of the second conveyor mat to rotate the rollers to transport articles atop the rollers.

5. A conveyor as in claim 1 wherein the first conveyor mat and the second conveyor mat are stationary.

6. A conveyor as in claim 1 wherein the first conveyor mat and the second conveyor mat include rows of belt modules interconnected by connecting pins.

7. A conveyor as in claim 6 wherein the first conveyor mat and the second conveyor mat are arranged end to end and connected one to the other by a connecting pin.

8. A conveyor as in claim 1 wherein the first conveyor mat and the second conveyor mat are endless modular conveyor belts driven to travel in the lengthwise direction along the carryway.

9. A conveyor as in claim 1 wherein the second conveyor mat is positioned to receive articles from the second end of the first conveyor mat.

10. A conveyor as in claim 1 wherein the second conveyor mat is positioned to receive articles from the second side of the first conveyor mat.

11. A conveyor as in claim 1 wherein the axes of the rollers in the first conveyor mat closer to the first side are parallel to each other and are mirror images of the axes of the rollers closer to the second side about a central lengthwise axis of the first conveyor mat.

12. A conveyor as in claim 1 wherein the rollers in the first conveyor mat are arranged to direct conveyed articles toward the widthwise center of the first conveyor mat.

13. A conveyor as in claim 1 wherein the first conveyor mat moves in the lengthwise direction along the carryway at a speed less than the speed of the second conveyor mat.

14. A conveyor as in claim 1 further comprising a third conveyor mat similar to the first conveyor mat and arranged parallel to the first conveyor mat.

15. A conveyor as in claim 14 wherein the first and third conveyor mats are separated from each other by the second conveyor mat disposed between them and wherein the rollers on each of the first and third conveyor mats are arranged to direct conveyed articles toward the second conveyor mat.

16. A conveyor as in claim 14 further including a center belt disposed between the first and third conveyor mats and wherein the rollers on each of the first and third conveyor mats are arranged to direct conveyed articles toward the center belt.

17. A conveyor as in claim 1 comprising a series of first conveyor mats and second conveyor mats arranged end to end to form a series of first zones in which conveyed articles are shifted in the widthwise direction by the rollers in the first conveyor mats and second zones in which the articles are separated on the second conveyor mats in the lengthwise direction by the increased speed in the lengthwise direction.

18. A conveyor suitable for singulating articles conveyed in a conveying direction along the length of the conveyor, comprising:

a first conveying zone; and

a second conveying zone positioned downstream of the first conveying zone in the conveying direction to receive conveyed articles from the first conveying zone;

the first conveying zone including a first conveyor mat with rollers for supporting conveyed articles and arranged to rotate about axes oblique to the conveying direction to provide a sideward component of motion transverse to the conveying direction to the conveyed articles;

the second conveying zone including a second conveyor mat providing a component of motion in the conveying direction to the conveyed articles received from the first conveying zone greater than the component of motion in the conveying direction in the first conveying zone.

19. A conveyor as in claim 18 further comprising a series of alternating first and second conveying zones in the conveying direction.

20. A conveyor as in claim 19 wherein the component of motion in the conveying direction increases monotonically as articles are conveyed downstream.

21. A conveyor as in claim 18 further including a third conveying zone similar to the first conveying zone, wherein the third conveying zone is disposed between the first conveying zone and the second conveying zone and the third conveying zone provides conveyed articles with a component of motion in the conveying direction greater then the component of motion provided by the second conveying zone.

22. A conveyor as in claim 18 wherein the rollers on one side of a central axis of the first conveyor mat in the conveying direction rotate about axes parallel to a first oblique axis and the rollers on the other side of the central axis rotate about axes parallel to a second oblique axis.

23. A conveyor as in claim 22 wherein the first and second oblique axes are mirror images about the central axis.

24. A conveyor as in claim 18 wherein the first conveying zone further includes a third conveyor mat disposed parallel to the first conveyor mat, the third conveyor mat including rollers arranged to rotate about axes oblique to the conveying direction wherein the rollers in the third conveyor mat provide a sideward component of motion to conveyed articles opposite to the sideward component of motion provided by the rollers in the first conveyor mat.

25. A conveyor as in claim 24 further including a conveyor belt disposed parallel to and between the first and third conveyor belts in the first conveying zone.

26. A conveyor as in claim 18 wherein the first conveyor mat in the first conveying zone and the second conveyor mat in the second conveying zone are moving conveyor belts and the second conveyor mat travels at a speed greater than the speed of the first conveyor mat.

27. A conveyor as in claim 18 wherein the first conveyor mat is stationary and the conveyor further includes a moving roller bearing surface in contact with the rollers in the first conveyor mat to rotate the rollers.

28. A conveyor suitable for singulating articles conveyed in a conveying direction along the length of the conveyor, comprising:

a centering belt having a central axis in the conveying direction dividing the centering belt into a left portion and a right portion;

the centering belt including rollers on the left portion arranged to rotate about axes forming first acute angles with the central axis measured counterclockwise from the central axis and rollers on the right portion arranged to rotate about axes forming second acute angles with the central axis measured clockwise from the central axis;

a separation belt arranged downstream of the centering belt to receive conveyed articles from the centering belt and operated at a speed to convey articles in the conveying direction faster than the articles are conveyed on the centering belt.

29. A conveyor as in claim 28 further comprising a roller bearing surface disposed to contact the rollers in the centering belt to rotate the rollers as the centering belt moves in the conveying direction.

30. A conveyor as in claim 29 wherein the rollers are cylindrical rollers protruding through top and bottom surfaces of the centering belt to engage the roller bearing surfaces in rolling contact.

31. A conveyor as in claim 29 wherein the rollers are spherical rollers protruding through top and bottom surfaces of the centering belt to engage the roller bearing surfaces in rolling contact.

32. A conveyor as in claim 28 wherein the first and second acute angles are equal.

33. A conveyor suitable for singulating articles conveyed in a conveying direction along the length of the conveyor, comprising:

a centering belt including rollers arranged to rotate about oblique axes as the centering belt travels in the conveying direction to direct conveyed articles toward a central axis of the belt in the conveying direction;

a separation belt arranged downstream of the centering belt and operated to speed up the conveyed articles received from the centering belt to separate the articles in the conveying direction.

34. A conveyor suitable for singulating articles conveyed in a conveying direction along the length of the conveyor, comprising:

a first roller-top belt disposed on a first side of a conveyor center line and including rollers arranged to rotate about axes parallel to a first oblique axis relative to the conveying direction;

a second roller-top belt disposed on an opposite second side of the conveyor center line and parallel to the first roller-top belt, and including rollers arranged to rotate about axes parallel to a second oblique axis relative to the conveying direction;

wherein the rollers on the first roller-top belt and the rollers on the second roller-top belt direct conveyed articles toward the center line;

a separation belt arrangement downstream of the first and second roller-top belts and operated at a speed to speed up the conveyed articles received from the roller-top belts to separate the articles in the conveying direction.

35. A conveyor as in claim 34 wherein the first roller-top belt and the second roller-top belt abut each other at the center line.

36. A conveyor as in claim 34 further comprising a singulator belt disposed parallel to and between the first roller-top belt and the second roller-top belt and wherein the singulator belt is operated at a speed to speed up articles received from the roller-top belts to separate the articles in the conveying direction.

37. A conveyor as in claim 34 wherein the separation belt arrangement includes a single conveyor belt.

38. A conveyor as in claim 34 wherein the separation belt arrangement includes a pair of parallel conveyor belts operated at the same speed and a singulator belt disposed parallel to and between the pair of parallel conveyor belts and operated at a higher conveying speed than the pair of parallel conveyor belts.

39. A conveyor as in claim 34 further comprising a series of singulator belts extending along the conveyor centerline.

40. A conveyor as in claim 34 wherein the first and second oblique axes are bisected by the conveyor centerline.