High speed article unscrambler and aligner

• US 5,415,281 A
• Filed: 03/25/1993
• Issued: 05/16/1995
• Est. Priority Date: 03/25/1993
• Status: Expired due to Term

• Current Assignee: Dematic Corporation (KION GROUP AG)
• Original Assignee: Rapistan Demag Corporation (Siemens AG)
• Inventors: Taylor, Eric R., LeMay, Curtis E., Brouwer, Gerald A., Woltjer, Bernard H.
• Primary Examiner(s): DAYOAN, DARRELL G
• Application Number:
  US08/037,035
• Time in Patent Office: 782 Days
• Field of Search: 198/443, 198/448, 198/456, 198/415, 198/786, 198/453, 198/454
• US Class Current: 198/448
• CPC Class Codes: B65G 47/31 by varying the relative speeds of the conveyors forming the series
• CPC Class Codes: B65G 47/682 from a single conveyor lane consisting of one conveyor or several adjacent conveyors

Abstract

An article unscrambler and aligner is disclosed which receives articles of different sizes in random order and position, and using plural side-by-side lanes each of which lanes has driven article transport rollers at different speeds, which speeds are uniform for the length of the lane, but are progressively higher in each lane toward one side of the unscrambler in order to provide a lateral linear speed increase. This speed increase causes separation and rotation of the articles and also causes them to arrange in single file along one side of the unscrambler'"'"'s surface and so discharge them onto a conveyor at the end of the unscrambler remote from that at which the articles were received. One or more lanes are composed of rollers of tapered diameter in order to make the lateral speed increase more uniform.

Claims

1. A high volume unscrambler and article aligner having a receiving portion to which articles are delivered in random order and alignment, and a discharge portion from which unscrambled aligned articles are discharged, said unscrambler and article aligner having an article transport surface that is adapted to transport articles longitudinally from said receiving portion to said discharge portion and to produce a linear speed increase laterally toward said discharge portion in order to cause articles laterally proximate said discharge portion to move ahead of laterally adjacent articles, wherein said linear speed increase is created by laterally tapered rollers creating a linearly increasing surface velocity laterally across the rollers.

2. The high volume unscrambler and article aligner in claim 1 wherein said transport surface has a substantially constant longitudinal speed between said receiving portion and said discharge portion.

3. The high volume unscrambler and article aligner in claim 1 including plural lanes of tapered rollers, each lane driven at a different rotational speed from adjacent lanes.

4. The high volume unscrambler and article aligner in claim 1 further including an alignment belt along said transport surface in line with said discharge portion and driven at a velocity at least as great as that of an adjacent portion of said transport surface.

5. A high volume unscrambler and article aligner having a receiving portion to which articles are delivered in random order and alignment, and a discharge portion from which unscrambled aligned articles are discharged, said unscrambler and article aligner having an article transport surface that is adapted to transport articles longitudinally from said receiving portion to said discharge portion and to produce a linear speed increase laterally toward said discharge portion in order to cause articles laterally proximate said discharge portion to move ahead of laterally adjacent articles, wherein said linear speed increase is created by plural lanes of rollers, each lane driven at a different rotation speed from adjacent lanes.

6. The high volume unscrambler and article aligner in claim 5 wherein said transport surface has a substantially constant longitudinal speed between said receiving portion and said discharge portion.

7. The high volume unscrambler and article aligner in claim 5 further including an alignment belt along said transport surface in line with said discharge portion and driven at a velocity at least as great as that of an adjacent portion of said transport surface.

8. A high volume unscrambler and article aligner to which articles are delivered in random order and alignment, said unscrambler having article receiving and supporting rollers arranged in plural side-by-side lanes which lanes are straight and extend the full length of the unscrambler, all rollers in each lane being driven at the same speed with the rollers in each lane being driven at a speed different from that of the rollers in each adjacent lane and the rollers in the article discharge lane being arranged along and adjacent one side of the unscrambler and driven at the highest speed with the rollers in the lane most remote from said discharge lane being driven at the slowest speed whereby, two laterally adjacent articles will be separated by the unscrambler by the article closest to the article discharge lane being caused to move ahead of the article in contact with it and the acceleration of the article closest to the article discharge lane will normally create a space behind it to receive the article of which it has just moved ahead.

9. The high volume unscrambler and article aligner as described in claim 8 wherein the rollers in at least one said lane are tapered rollers tapered from a small diameter end to a large diameter end, said tapered rollers being in a lane driven at a higher speed and said small diameter and being proximate a lane driven at a lower speed than said at least one lane.

10. The high volume unscrambler and article aligner as described in claim 8 further including an alignment belt along said discharge lane driven at a velocity at least as great as that of an adjacent portion of said discharge lane.

11. A high volume unscrambler and article aligner to which articles are delivered in random order and alignment, said unscrambler having article receiving and supporting rollers arranged in plural side-by-side lanes;

means for causing the rollers in each lane to be rotated at a uniform rotational speed, which speed is different from that of rollers in any lane immediately adjacent thereto, the lane having rollers driven at the highest speed discharging articles at one end thereof onto a receiving conveyor, the rollers in all the lanes collectively forming an article conveying surface on which articles are caused to move both lengthwise of the unscrambler and transversely thereof toward the lane having the highest speed rollers, the rollers in the lane driven at the highest speed being tapered in diameter lengthwise thereof with the end thereof of least diameter being adjacent the rollers in the lane from which articles are received transversely of the unscrambler.

12. The high volume unscrambler and article aligner described in claim 11 wherein the rollers in the lane next adjacent said highest speed rollers are also tapered in diameter lengthwise thereof, with the ends of greatest diameter being adjacent the ends of least diameter of the rollers driven at the highest speed whereby articles from said next adjacent lane are delivered to the ends of least diameter of said rollers in said lane of highest speed.

13. The high volume unscrambler and article aligner described in claim 11 wherein the rollers in each of the lanes thereof are tapered in diameter lengthwise of the rollers and skewed to the centerline of the conveyor for urging articles to move transversely of the surface of said unscrambler as well as lengthwise thereof, the ends of greatest diameter of the rollers in each lane being adjacent to and discharging onto the ends of least diameter of the rollers in the next adjacent lane for moving articles both lengthwise and transversely of said unscrambler.

14. The high volume unscrambler and article aligner described in claim 12 wherein the rollers in the lane most remote from the lane having said highest speed rollers are of uniform diameter throughout their length.

15. The high volume unscrambler and article aligner described in claim 13 wherein the article contacting surfaces of said rollers in all lanes are in the same plane throughout the length and width of said unscrambler.

16. The high volume unscrambler and article aligner described in claim 11 wherein the article contacting surfaces of said rollers in all lanes are in the same level plane throughout the length and width of said unscrambler.

17. The high volume unscrambler and article aligner described in claim 11 including upstanding means extending lengthwise of said article conveying surface adjacent the ends of said highest speed rollers remote from said next adjacent lane for guiding articles lengthwise of said surface toward said receiving conveyor.

18. The high volume unscrambler and article aligner described in claim 17 wherein said upstanding means is a belt, means to drive said belt in a direction urging articles in contact therewith toward said receiving conveyor.

19. The high volume unscrambler and article aligner described in claim 18 wherein said upstanding means is a plurality of belts arranged in tandem lengthwise of said unscrambler.

20. The high volume unscrambler and article aligner described in claim 11 wherein the article conveying surface formed by the rollers driven at the highest speeds is inclined downwardly away from the rollers in the next adjacent lane.

21. The high volume unscrambler and article aligner described in claim 12, wherein the ends of said rollers of the lane adjacent said highest speed lane form an article conveying surface which discharges articles onto the rollers of said highest speed lane at a point which is elevated and spaced above the plane formed by the article contacting surfaces of the rollers in said highest speed zone, wherein the difference in surface elevation between the rollers of said high speed and next adjacent lane retards contact with the rollers of such high speed lane until the center of gravity of the article is adjacent to or has passed beyond the ends of the rollers of said next adjacent lane.

22. The high volume unscrambler and article aligner described in claim 21 wherein the ends of said rollers of said adjacent lane are a fraction an inch above the adjacent top surfaces of the rollers in said high speed lane.

23. The high volume unscrambler and article aligner described in claim 12 wherein the article contacting and conveying surface formed by the rollers of said lane next adjacent said highest speed rollers is inclined upwardly toward the end thereof adjacent said highest speed rollers whereby articles are required to pivot downwardly through an arc which is the sum of the downward inclination of the surfaces of the rollers of said high speed lane and the upward inclination of the surfaces of the rollers of said next adjacent lane to effect a rapid and abrupt transfer of articles between said lanes.

24. A high volume unscrambler and article aligner for articles or packages having flat top, bottom and sides, said unscrambler having elongated plural straight side-by-side article transporting lanes forming an article transport surface, each of said lanes having a plurality of rollers arranged in closely spaced order, the axes of which rollers in each lane being parallel and skewed at a minor angle transversely to the centerline of the lane for moving the articles both lengthwise and toward one side of said transport surface, the rollers in the lane adjacent said one side being of tapered diameter with the end thereof of greatest diameter being adjacent said one side for both accelerating the articles and arranging them along said one side, means for forcibly rotating each of said rollers, said means rotating said rollers in each lane at a different speed with the highest speed being applied to the rollers adjacent said one side and the slowest speed being applied to the rollers in the lane most remote therefrom.

25. The high volume unscrambler and article aligner described in claim 24 wherein the axes of the rollers in at least two side-by-side lanes are tapered in diameter in the same direction and inclined to the centerlines in their lanes in the same direction with the ends of the article supporting surfaces of the rollers remote from said one side of said transport surface being elevated above the adjacent surfaces of the rollers in the other of said side-by-side lanes for providing an abrupt transfer of an article moving transversely of said lanes when a major portion of the weight of the article is caused to be above the rollers of said next adjacent lane.

26. A high volume unscrambler and article aligner having a plurality of side-by-side article transport lanes which lanes collectively form the article transport surface of said unscrambler, a plurality of rollers forming the article transport surface of each lane, means for driving the rollers in each lane at the same speed which speed is different from that of the rollers in each adjacent lane with the rollers of one of said lanes being driven at the highest speed and serving as the discharge lane, the rollers of said one lane and the next adjacent lane being tapered in diameter lengthwise thereof, means adjacent the ends of greatest diameter of the rollers in said discharge lane preventing discharge of articles therefrom lengthwise of said rollers, the ends of greatest diameter of said rollers in both, lanes in said discharge and the lane next adjacent thereto facing in the same direction.

27. The high volume unscrambler and article aligner described in claim 26 wherein the article transport surfaces of the rollers in said adjacent lane being inclined upwardly toward the end thereof of greatest diameter.

28. The high volume unscrambler and article aligner described in claim 26 wherein the article transport surfaces of the rollers in said discharge lane being inclined downwardly away from the ends of the rollers in said adjacent lane.

29. The high volume unscrambler and article aligner described in claim 26 wherein the article transport surfaces of the rollers in said adjacent lane being inclined upwardly toward the end thereof of greatest diameter and the article transport surfaces of the rollers in said discharge lane being inclined downwardly away from the ends of the rollers in said adjacent lane.

30. The high volume unscrambler and article aligner described in claim 26 wherein the article discharge ends of the rollers of said adjacent lane are a fraction of an inch above the surfaces of the adjacent ends of the rollers of said discharge lane.

31. A high volume unscrambler and article aligner having a receiving portion to which articles are delivered in random order and alignment, and a discharge portion from which unscrambled aligned articles are discharged, said unscrambler and article aligner having an article transport surface that is adapted to transport articles longitudinally from said receiving portion to said discharge portion and to produce a linear speed increase that is substantially continuously variable laterally toward said discharge portion in order to cause articles laterally proximate said discharge portion to move ahead of laterally adjacent articles.

32. The high volume unscrambler and article aligner in claim 31 wherein said transport surface has a substantially constant longitudinal speed between said receiving portion and said discharge portion.

33. The high volume unscrambler and article aligner in claim 31 wherein said linear speed increase is created by laterally tapered rollers creating a linearly increasing surface velocity laterally across the rollers.

34. The high volume unscrambler and article aligner in claim 33 including plural lanes of tapered rollers, each lane driven at a different rotational speed from adjacent lanes.

35. The high volume unscrambler and article aligner in claim 31 further including an alignment belt along said transport surface in line with said discharge portion and driven at a velocity at least as great as that of an adjacent portion of said transport surface.