Automated array sorter for conveyors

• US 6,227,377 B1
• Filed: 09/09/1997
• Issued: 05/08/2001
• Est. Priority Date: 09/09/1997
• Status: Expired due to Term

• Current Assignee: United Parcel Service Of America Incorporated (United Parcel Service Incorporated)
• Original Assignee: United Parcel Service Of America Incorporated (United Parcel Service Incorporated)
• Inventors: Bonnet, Henri
• Primary Examiner(s): Nguyen, Tuan N.
• Application Number:
  US08/926,056
• Time in Patent Office: 1,337 Days
• Field of Search: 209/606, 209/650, 209/941, 198/435, 198/587, 198/588
• US Class Current: 209/650
• CPC Class Codes: B65G 21/12 to allow adjustment of position of load-carrier or traction element as a whole
• CPC Class Codes: B65G 47/647 the axis being perpendicular to the conveying direction
• CPC Class Codes: B65G 47/648 about a vertical axis
• CPC Class Codes: Y10S 209/941 Item carrying bridge raisable to expose discharge opening

Abstract

The present invention reveals an automated sorting device capable of receiving articles from an input source, correctly choosing among which of many output destinations to direct the articles, and transferring those articles without slowing the sorting process. To accomplish its purpose, a sorting conveyor is pivoted at its receiving end about both a horizontal axis and a vertical axis. The sorting conveyor is cradled within a vertically moveable carriage which, in turn, is mounted within a horizontally moveable frame. The frame is driven horizontally and the carriage driven vertically to align the conveyor'"'"'s output end with each output destination. In a preferred embodiment, tracks attached to a support structure stabilize the frame and a controller positions the frame and carriage in response to destination indicia associated with each article to be sorted.

Claims

1. An apparatus for automatically distributing articles from a source to a plurality of destinations, said plurality of destinations forming an array, and said apparatus comprising:

a sorting conveyor, mounted at a receiving end to a pivot which is pivotable about a horizontal axis and a vertical axis, defining a distributing end spaced apart from said receiving end;

a frame including a carriage which loosely cradles said conveyor between said receiving and distributing ends;

first means for moving said frame horizontally along a straight line path, causing said conveyor to rotate about said vertical axis;

means for stabilizing said frame as it moves along said path;

means for engaging said frame with said means for stabilizing;

second means for moving said carriage vertically, causing said conveyor to rotate about said horizontal axis; and

a controller configured to operate said first and second means for moving to align said distributing end with any of said destinations;

wherein said means for stabilizing comprises a track in contact with a plurality of wheels attached to a bottom end and a top end of said frame.

2. The apparatus of claim 1, wherein said pivot provides said conveyor sufficient range of motion to permit said conveyor passive movement within said carriage as said distributing end moves between any pair of opposite peripheral destinations of said array.

3. The apparatus of claim 1, wherein said destinations are spaced in said array both vertically and horizontally from one another, and positioned to sufficiently mate with said distributing end so as to enable uninterrupted transfer of said articles.

4. The apparatus of claim 1, wherein said path is of sufficient length to enable said frame to align said distributing end with any pair of opposite peripheral destinations.

5. The apparatus of claim 1, wherein said wheels are rotably connected to said first means to propel said frame along said track.

6. The apparatus of claim 1, wherein said frame comprises a pair of spaced apart vertical supports;

and wherein said carriage comprises a pair of followers connected by a cross-member, said followers mounted for travel along said vertical supports, and wherein said cross-member is of sufficient width to cradle said conveyor and permit said conveyor a full range of passive movement relative to said frame and said carriage.

7. The apparatus of claim 1, wherein said controller is operative to move said frame horizontally along said straight path, so as to enable alignment of said distributing end with horizontally-spaced peripheral destinations of opposite edges of said array and with each said destination located in-between and parallel thereto.

8. The apparatus of claim 1, wherein said controller is operative to move said carriage vertically along said frame, so as to enable alignment of said distributing end with vertically spaced peripheral destinations of opposite edges of said array and each said destination located in-between and parallel thereto.

9. The apparatus of claim 1, wherein said controller is operative to receive destination information for each article, and to operate said first and second means to move said frame and said carriage responsive to said destination information.

10. The apparatus of claim 9, further comprising an optical reader positioned to read destination information printed on a label affixed to said articles.

11. An apparatus for automatically distributing articles from a source to a plurality of destinations forming an array, comprising:

a sorting conveyor, mounted at a receiving end to a pivot about a horizontal axis and a vertical axis, defining a distributing end spaced apart from said receiving end;

a frame including a carriage which loosely cradles said conveyor between said receiving and distributing ends;

first means for moving said frame horizontally along a path, causing said conveyor to rotate about said vertical axis;

second means for moving said carriage vertically, causing said conveyor to rotate about said horizontal axis;

an optical reader positioned to read destination information printed on a label affixed to said articles; and

a controller operative to receive said destination information and configured to operate said first and second means for moving to align said distributing end with any of said destinations responsive to said destination information.

12. An apparatus for automatically distributing articles from a source to a plurality of destinations, said plurality of destinations forming an array, and said apparatus comprising:

a pivoting conveyor defining a receiving end mounted to pivot about both a horizontal axis and a vertical axis and defining a distributing end spaced apart from said receiving end; and

a sorting drive mechanism comprising;

an upwardly opening cradle positioned to loosely receive said pivoting conveyor intermediate said receiving and distributing ends thereof,

a vertically extending leg mounted for movement along a horizontal track,

said cradle being mounted for vertical movement along said vertical leg, said vertical movement pivoting said pivoting conveyor about said horizontal axis, and

said track being disposed such that movement of said vertical leg along said track pivots said pivoting conveyor about said vertical axis,

a first drive assembly connected to translate said vertical leg along said track,

a second drive assembly connected to move said cradle vertically along said vertical leg, and

a controller configured to operate said first and second drive assemblies to substantially align said distributing end with at least one of said destinations.

13. The apparatus of claim 12, wherein said vertical leg is a first vertical leg and further comprising a second vertical leg spaced apart from said first vertical leg.

14. The apparatus of claim 13, wherein said cradle is positioned between and mounted for vertical movement along said first vertical leg and said second vertical leg.

15. The apparatus of claim 14, wherein said cradle comprises:

a first follower mounted for vertical movement along said first vertical leg;

a second follower mounted for vertical movement along said second vertical leg; and

a supporting cross-member extending between said first follower and said second follower, said cross-member being of sufficient width to permit passive movement of said conveyor relative to said cross-member and said first and second vertical legs.

16. A method of automatically distributing an article from a source to one of a plurality of destinations, said plurality of destinations forming an array and said method comprising the steps of:

providing a pivoting conveyor defining a receiving end mounted to pivot about both a horizontal axis and a vertical axis and defining a distributing end spaced apart from said receiving end;

providing an upwardly opening cradle positioned to loosely receive said pivoting conveyor at a first position intermediate said receiving and distributing ends of said cradle;

moving said cradle horizontally so that said pivoting conveyor pivots about said vertical axis and so that said cradle receives said pivoting conveyor at a second position intermediate said receiving and distributing ends; and

moving said article from a surface of said conveyor to said destination.

17. The method of claim 16, wherein a distance between said first position and said receiving end is greater than a distance between said second position and said receiving end.

18. The method of claim 16, wherein a distance between said first position and said receiving end is less than a distance between said second position and said receiving end.

19. The method of claim 17, further comprising the step of moving said cradle vertically so that said pivoting conveyor pivots about said horizontal axis.

20. The method of claim 19, wherein said steps of moving said cradle horizontally and vertically serve to substantially align said receiving end with said destination.

21. The method of claim 20, wherein said steps of moving said cradle horizontally and vertically are executed in response to a step of scanning destination indicia associated with said article.

22. A method of automatically distributing an article from a source to one of a plurality of destinations, said plurality of destinations forming an array and said method comprising the steps of:

providing a pivoting conveyor defining a receiving end mounted to a pivot about both a horizontal axis and a vertical axis and defining a distributing end spaced apart from said receiving end;

providing an upwardly opening cradle positioned to loosely receive said pivoting conveyor at a first position intermediate said receiving and distributing ends of said cradle;

moving said cradle vertically so that said pivoting conveyor pivots about said horizontal axis and so that said cradle receives said pivoting conveyor at a second position intermediate said receiving and distributing ends; and

moving said article from a surface of said conveyor to said destination.

23. The method of claim 22, wherein a distance between said first position and said receiving end is greater than a distance between said second position and said receiving end.

24. The method of claim 22, wherein a distance between said first position and said receiving end is less than a distance between said second position and said receiving end.

25. The method of claim 23, further comprising the step of moving said cradle horizontally so that said pivoting conveyor pivots about said vertical axis.

26. The method of claim 25, wherein said steps of moving said cradle horizontally and vertically serve to substantially align said receiving end with said destination.

27. The method of claim 26, wherein said steps of moving said cradle horizontally and vertically are executed in response to a step of scanning destination indicia associated with said article.

28. An apparatus for automatically distributing articles from a source to a plurality of destinations, said destinations forming an array, and said apparatus comprising:

a sorting conveyor, mounted at a receiving end to a pivot that is pivotable about both a horizontal axis and a vertical axis, defining a distributing end spaced apart from said receiving end;

a frame including a carriage that cradles said conveyor between said receiving and distributing ends;

first means for moving said frame horizontally along a path, causing said conveyor to rotate about said vertical axis;

second means for moving said carriage vertically, causing said conveyor to rotate about said horizontal axis;

a reader positioned to read destination information affixed to said articles; and

a controller operative to receive said destination information and configured to operate said first and second means for moving to align said distributing end with any of said destinations responsive to said destination information.

29. An apparatus for automatically distributing articles from a source to a plurality of destinations, said plurality of destinations forming an array, and said apparatus comprising:

a sorting conveyor defining a receiving end and a distributing end spaced apart from said receiving end, said sorting conveyor being pivotably mounted to a first support member so that said sorting conveyor may be pivoted about both a vertical and a horizontal axis;

a second support member spaced apart from said first support member and mounted to support a portion of a weight of said conveyor, said second support member having a conveyor support portion that is movable along both a first axis and a second axis;

a first drive assembly connected to translate said conveyor support portion along said first axis;

a second drive assembly connected to translate said conveyor support portion along said second axis; and

a controller configured to operate said first and second drive assemblies to substantially align said distributing end with at least one of said destinations.

30. The apparatus of claim 29 wherein said first axis and said second axis are coplanar.