System for sorting articles

• US 5,990,437 A
• Filed: 02/05/1997
• Issued: 11/23/1999
• Est. Priority Date: 02/05/1997
• Status: Expired due to Fees

• Current Assignee: W & H Systems Incorporated
• Original Assignee: W & H Systems Incorporated
• Inventors: Steblaj, Frank P., Coutant, Ralph, Iversen, Alfred W.
• Primary Examiner(s): Ellis, Christopher P.
• Assistant Examiner(s): TRAN, THUY VAN
• Application Number:
  US08/794,861
• Time in Patent Office: 1,021 Days
• Field of Search: 198/370.04, 198/370.03, 198/704, 198/349.95, 209/3.3, 209/583, 209/579, 209/577, 209/584, 209/587, 209/559
• US Class Current: 209/583
• CPC Class Codes: B07C 3/06 Linear sorting machines in which articles are removed from a stream at selected points
• CPC Class Codes: B65G 47/965 tilting about a sided-axis, i.e. the axis is not located near the center-line of the load-carrier

Abstract

A system for sorting articles, the system having a track which defines a route starting at at least one loading point, the route continuing on to a plurality of destination points and arriving back at the loading point. The system also has at least one tray for conveying an article from the loading point to a selected one of the destination points. The track includes a first segment for momentarily tilting a leading end of the tray upward relative to a trailing end of the tray and possibly downward again, and a second segment for laterally tilting the tray at an angle. The first and second segments selectively maneuver an article loaded in the tray to a bottom corner thereof prior to the tray reaching the selected destination point in order to substantially reduce the jarring of the article during the discharge thereof at the selected destination point. A scanner is provided for scanning an identification-code disposed on the article. The scanner is coupled to a controller which determines the selected destination point using the information obtained by the scanner from the identification-code disposed on the article.

Claims

1. A system for sorting articles, comprising:

a track defining a route starting at at least one loading point, continuing onto a plurality of destination points, and arriving back at said at least one loading point;

at least one tray for conveying an article from said at least one loading point to a selected one of said destination points, said at least one tray having a leading end and a trailing end;

wherein said track includes first means for momentarily tilting said leading end of said at least one tray upward relative to said trailing end of said at least one tray, and second means for laterally tilting said at least one tray at an angle, said first and second means for selectively maneuvering an article loaded in said at least one tray to a bottom corner thereof prior to said at least one tray reaching said selected one of said destination points in order to substantially reduce the jarring of the article during the discharge thereof at said selected one of said destination points.

2. The system for sorting articles according to claim 1, further comprising third means for momentarily tilting said leading end of said at least one tray downward relative said trailing end of said at least one tray to maneuver said article toward said leading edge of said tray, said third means located between said first means and said second means.

3. The system for sorting articles according to claim 1, further comprising tray driving means for driving said at least one tray along said track.

4. The system for sorting articles according to claim 1, wherein said at least one tray includes means for enabling the article to be selectively discharged from said at least one tray when said at least one tray reaches said selected one of said destination points.

5. The system for sorting articles according to claim 1, further comprising diverter means for causing the article to be discharged from said at least one tray at said selected one of said destination points.

6. The system for sorting articles according to claim 5, further comprising controller means coupled to said diverter means for selectively activating said diverter means.

7. The system for sorting articles according to claim 1, further comprising controller means for determining said selected one of said destination points using information relating to the location of said at least one tray on said track and the article loaded thereon.

8. The system for sorting articles according to claim 7, further comprising:

tray driving means for driving said at least one tray along said track,

speed measuring means coupled between said controller means and said tray driving means, for monitoring the speed of said tray driving means, said controller means using the speed of said tray driving means and a sensed reference location of said tray to determine the location of said at least one tray on said track.

9. The system for sorting articles according to claim 7, further comprising scanning means coupled to said controller means, for scanning an identification-code disposed on the article loaded on said at least one tray and a photosensor means for sensing presence of the article on said at at least one tray.

10. The system for sorting articles according to claim 9, further comprising diverter means coupled to said controller means and associated with said destination points of said track, for causing the article to be discharged from said at least one tray at said selected one of said destination points, said controller activating said diverter means in response to information received from said speed measuring means and said scanning means.

11. The system for sorting articles according to claim 9, wherein said photosensor means is associated with said track such that said at least one tray passes over said photosensor means as said at least one tray moves along said track, said at least one tray including a base with a plurality of apertures which enables said photosensor means to scan through said base and determine whether said at least one tray includes said article.

12. The system for sorting articles according to claim 1, wherein said at least one tray includes raised rib sections in a base portion thereof to provide stabilization in said tray for specific article types.

13. The system for sorting articles according to claim 12, wherein said specific article types include round objects.

14. A system for sorting articles, comprising:

a track defining a route starting at at least one loading point, continuing on to a plurality of destination points, and arriving back at said at least one loading point;

at least one tray for conveying an article from said at least one loading point to a selected one of said destination points, said at least one tray having a leading end and a trailing end;

wherein said track includes at least a first segment for orienting said at least one tray in a horizontal position in order that said at least one tray can be loaded with an article at said at least one loading point, at least a second segment for momentarily tilting said leading end of said at least one tray upward relative to said trailing end of said at least one tray, and at least a third segment for laterally tilting said at least one tray at an angle from said horizontal position, said second and third segments of said track selectively maneuvering the article loaded in said at least one tray to a bottom corner thereof prior to said at least one tray reaching said selected one of said destination points in order to substantially reduce the jarring of the article during the discharge thereof at said selected one of said destination points.

15. The system for sorting articles according to claim 14, further comprising a fourth segment for momentarily tilting said leading end of said at least one tray downward relative to said trailing end of said at least one tray to maneuver said article toward said leading edge of said tray prior to reaching said third segment, said fourth segment coupled between said second segment and said third segment.

16. The system for sorting articles according to claim 14, further comprising:

a drive chain coupled to said at least one tray for pulling said at least one tray along said track; and

an electric motor for driving said drive chain.

17. The system for sorting articles according to claim 14, wherein said at least one tray includes a discharge door and latch means for opening said discharge door to discharge the article when said at least one tray reaches said selected one of said destination points.

18. The system for sorting articles according to claim 17, further comprising a diverter associated with each of said destination points, one of said diverters being operative for activating said latch means to discharge the article from said at least one tray at said selected one of said destination points.

19. The system for sorting articles according to claim 18, further comprising controller means coupled to said diverters for selectively activating said one of said diverters.

20. The system for sorting articles according to claim 14, further comprising controller means for determining said selected one of said destination points using information pertaining to the location of said at least one tray on said track and the article loaded thereon.

21. The system for sorting articles according to claim 20, further comprising:

a motor; and

an encoder coupled to said controller means and said motor for monitoring the speed of said motor in revolutions/minute and converting the speed into a digital signal representing a linear dimension, said controller means using said digital signal representing said linear dimension and a sensed reference location of said tray to determine the location of said at least one tray on said track.

22. The system for sorting articles according to claim 20, further comprising a scanning means coupled to said controller means, for scanning an identification code disposed on an article loaded on said at least one tray and a photosensor means for sensing presence of the article on said at least one tray and a photosensor means for sensing presence of the article on said at least one tray.

23. The system for sorting articles according to claim 22, further comprising a plurality of diverters coupled to said controller means, each one of said diverters associated with one of said destination points, one of said diverters being operative for causing the article to be discharged from said at least one tray at said selected one of said destination points, said controller selectively activating one of said diverters in response to information received from said encoder and said scanning means.

24. The system for sorting articles according to claim 22, wherein said photosensor means is associated with said track such that said at least one tray passes over said photosensor means as said at least one tray moves along said track, said at least one tray including a base with a plurality of apertures which enables said photosensor means to scan through said base and determines whether said at at least one tray includes said article.

25. The system for sorting articles according to claim 22, wherein said controller means provides an operator of said system with a plurality of graphical user interface screens.

26. The system for sorting articles according to claim 14, wherein said at least one tray includes raised rib sections in a base portion thereof to provide stabilization for articles loaded in said tray.

27. A system for sorting articles, comprising:

a track defining a route starting at at least one loading point, continuing on to a plurality of destination points, and arriving back at said at least one loading point;

at least one tray for conveying an article having an identification code disposed thereon, from said at least one loading point to a selected one of said destination points;

photosensor means for determining whether said article is disposed within said at least one tray;

scanning means for scanning the identification-code disposed on the article loaded in said at least one tray; and

controller means for determining said selected one of said destination points using the identification-code disposed on the article, wherein said track includes first means for momentarily tilting a leading end of said at least one tray upward relative to a trailing end of said at least one tray, and second means for laterally tilting said at least one tray at an angle, said first and second means selectively maneuvering an article loaded in said at least one tray to a bottom corner thereof prior to said at least one tray reaching said selected one of said destination points in order to substantially reduce the jarring of the article during the discharge thereof at said selected one of said destination points.

28. The system for sorting articles according to claim 27, further comprising:

a motor; and

an encoder coupled to said controller means and said motor for monitoring the speed of said motor in revolutions/minute and converting the speed into a digital signal representing a linear dimension, said controller means using said digital signal representing said linear dimension to determine the location of said at least one tray on said track.

29. The system for sorting articles according to claim 27, further comprising third means for momentarily tilting said leading end of said at least one tray downward relative said trailing end of said at least one tray to maneuver said article toward said leading edge of said tray, said third means located between said first means and said second means.