Apparatus for controlling the flow of articles

• US 6,230,874 B1
• Filed: 12/07/1999
• Issued: 05/15/2001
• Est. Priority Date: 12/07/1999
• Status: Expired due to Term

• Current Assignee: Illinois Tool Works Inc.
• Original Assignee: Hartness International Inc. (Illinois Tool Works Inc.)
• Inventors: Beesley, Robert C., Steeber, Dorian F., Duterte, Olivier P.
• Primary Examiner(s): Olszewski, Robert P.
• Assistant Examiner(s): RIDLEY, RICHARD W L
• Application Number:
  US09/456,957
• Time in Patent Office: 525 Days
• Field of Search: 198/594
• US Class Current: 198/602
• CPC Class Codes: B65G 15/60 Arrangements for supporting or guiding belts, e.g. by fluid jets
• CPC Class Codes: B65G 2201/02 Articles
• CPC Class Codes: B65G 47/5131 by relative displacement between conveyors or conveyor parts and bridging means therebetween
• CPC Class Codes: B65G 47/52 Devices for transferring articles or materials between conveyors i.e. discharging or feeding devices loading or unloading by means not incorporated in, or not operatively associated with, conveyors B65G65/00; transfer of workpieces during metal rolling B21B41/00

Abstract

An apparatus for controlling the flow of articles between a first conveyor driven in a first direction and a second conveyor driven in a second direction includes a movable transport member disposed across and movable along a space between the conveyors. The transport member includes a drive member drivingly engaged simultaneously by the first and second conveyors so as to rotate if either of the conveyors is moving and to travel linearly along the space between the conveyors if a relative speed difference exists between the conveyors. The transport member includes an article transfer device or member disposed so as to contact and transfer articles from the first conveyor to the second conveyor along a transfer path. The article transfer member includes an endless drive belt disposed along the transfer path so as to contact and move the articles therealong. The drive belt runs in an endless path between the drive member and the article transfer member and is drivingly engaged by a belt drive wheel that is driven by the drive member.

Claims

1. An apparatus for controlling the flow of articles, comprising:

a first conveyor driven in a first direction to convey articles thereon in said first direction, and a second conveyor driven in a second direction opposite to said first direction to convey articles thereon in said second direction;

said first and second conveyors extending side-by-side and parallel with a space defined therebetween;

a movable transport member disposed generally across and movable along said space, said transport member having a singular drive wheel drivingly engaged simultaneously on its circumference by said first and second conveyors so that said drive wheel continuously rotates as either of said first and second conveyors move and said transport member travels along said space if a relative speed difference exists between said first and second conveyors;

an article transfer member carried by said transport member and operably disposed relative to said conveyors to contact and transfer articles from said first conveyor to said second conveyor along a transfer path; and

wherein said article transfer member further comprises an endless drive belt disposed along said transfer path so as to contact and move articles therealong, said drive belt running in an endless path between said drive wheel and said article transfer member and drivingly engaged by a belt drive wheel mounted on and driven by said drive wheel.

2. An apparatus for controlling the flow of articles, comprising:

a first conveyor driven in a first direction to convey articles thereon in said first direction, and a second conveyor driven in a second direction opposite to said first direction to convey articles thereon in said second direction;

said first and second conveyors extending side-by-side and parallel with a space defined therebetween;

a movable transport member disposed generally across and movable along said space, said transport member having a drive member drivingly engaged simultaneously by said first and second conveyors so that said drive member continuously rotates as either of said first and second conveyors move and said transport member travels along said space if a relative speed difference exists between said first and second conveyors;

an article transfer member carried by said transport member and operably disposed relative to said conveyors to contact and transfer articles from said first conveyor to said second conveyor along a transfer path;

wherein said article transfer member further comprises an endless drive belt disposed along said transfer path so as to contact and move articles therealong, said drive belt running in an endless path between said drive member and said article transfer member and drivingly engaged by a belt drive wheel driven by said drive member; and

wherein said article transfer member further is mounted on a rear support plate and said drive member is mounted on a front support plate, said front and rear support plates pivotally mounted relative to each other at a common pivot point.

3. The apparatus as in claim 2, wherein said article transfer member further comprises an idler wheel, said transfer path defined between said drive belt and a circumferential portion of said idler wheel, and said drive member further comprises a drive wheel simultaneously engaged by drive lugs on each of said conveyors so as to continuously rotate so long as at least one of said conveyors is moving.

4. The apparatus as in claim 3, wherein said article transfer member further comprises a dead plate disposed so as to extend between said conveyors along said transfer path, said dead plate carried by a dead plate support that is also pivotally mounted at said common pivot point.

5. The apparatus as in claim 4, wherein said dead plate support and said front and rear support plates are operably connected by a gear mechanism so that pivotal movement of either of said front and rear support plates is transferred to said dead plate support as said transport member moves along curves defined by said conveyors.

6. The apparatus as in claim 5, wherein said gear mechanism has a different gear ratio between said front and rear support plates than for said dead plate support, said gear ratio for said dead plate support selected so that said dead plate remains substantially perpendicular to said conveyors as said transport member moves along curves defined by said conveyors.

7. The apparatus as in claim 6, wherein said gear mechanism comprises a gear member mounted to said front support plate and comprises a first gear engaged with said rear support plate and a second gear engaged with said dead plate support.

8. The apparatus as in claim 5, further comprising a rigid guide member carried by said article transfer member, said drive belt supported by and movable along said guide member, said guide member carried by a support member that is engaged by at least one of said front, rear, and dead plate supports and further comprises oppositely extending guide arms movable in guide ways in said first and second conveyors.

9. The apparatus as in claim 8, further comprising a belt tensioning device carried by said drive member.

10. The apparatus as in claim 9, wherein said belt tensioning device comprises at least two belt guides around which said drive belt runs, said belt guides pivotally mounted relative to each other and interconnected by a spring device.

11. The apparatus as in claim 10, further comprising a linkage member interconnected between one of said belt guides and said guide member such that pivotal movement of said guide member as said transport member moves along curves defined by said conveyors is imparted to said belt guide causing said belt guides to change belt position so a relatively constant article conveying speed of said drive belt is maintained through said curves.

12. An apparatus for controlling the flow of articles, comprising:

a first conveyor driven in a first direction to convey articles thereon in said first direction, and a second conveyor driven in a second direction opposite to said first direction to convey articles thereon in said second direction;

said first and second conveyors extending side-by-side and parallel with a space defined therebetween;

a movable transport member disposed generally across and movable along said space, said transport member having a drive member carried by a front support and drivingly engaged simultaneously by said first and second conveyors so that said drive member continuously rotates as either of said first and second conveyors move and said transport member travels along said space if a relative speed difference exists between said first and second conveyors;

said transport member further comprising an article transfer member carried by a rear support and operably disposed relative to said conveyors to contact and transfer articles from said first conveyor to said second conveyor along a transfer path;

said front and rear supports pivotally mounted relative to each other at a common pivot point and geared together at a first gear ratio; and

said article transfer member further comprising a dead plate extending generally perpendicular between said conveyors along said transfer path, said dead plate carried by a dead plate support that is also pivotally mounted at said common pivot point and geared to one of said front and rear supports at a second gear ratio selected such that said dead plate remains substantially perpendicular to said conveyors as said article transfer member and drive member move along curves defined by said conveyors.

13. The apparatus as in claim 12, wherein said dead plate support and said front and rear supports are operably engaged by a common gear mechanism.

14. The apparatus as in claim 13, wherein said gear mechanism is mounted to said front support and comprises a first gear engaged with said rear support and a second gear engaged with said dead plate support.

15. The apparatus as in claim 12, wherein said article transfer member further comprises an endless drive belt disposed along said transfer path so as to contact and move articles therealong, said drive belt running in an endless path between said drive member and said article transfer member and drivingly engaged by a belt drive wheel driven by said drive member.

16. The apparatus as in claim 12, further comprising a rigid guide member carried by said article transfer member, said drive belt supported by and movable along said guide member, said guide member carried by a pivotally mounted guide member support engaged by at least one of said front, rear, and dead plate supports and further comprising oppositely extending guide arms movable in guide ways in said first and second conveyors.

17. The apparatus as in claim 12, further comprising a belt tensioning device carried by said drive member.

18. The apparatus as in claim 17, wherein said belt tensioning device comprises at least two belt guides around which said drive belt runs, said belt guides pivotally mounted relative to each other and interconnected by a spring device.

19. The apparatus as in claim 18, further comprising a linkage member interconnected between one of said belt guides and said guide member such that pivotal movement of said guide member as said transport member moves along curves defined by said conveyors is imparted to said belt guide causing said belt guides to change belt position so a relatively constant article conveying speed of said drive belt is maintained through said curves.

20. An apparatus for controlling the flow of articles, comprising:

a first conveyor driven in a first direction to convey articles thereon in said first direction, and a second conveyor driven in a second direction opposite to said first direction to convey articles thereon in said second direction;

said first and second conveyors extending side-by-side and parallel with a space defined therebetween;

a movable transport member disposed generally across and movable along said space, said transport member having a drive member drivingly engaged simultaneously by said first and second conveyors so that said drive member continuously rotates as either of said first and second conveyors move and said transport member travels along said space if a relative speed difference exists between said first and second conveyors;

an article transfer member carried by said transport member and operably disposed transversely to said conveyors to contact and transfer articles from said first conveyor to said second conveyor along a transfer path;

an endless drive belt disposed along said transfer path so as to contact and move articles therealong, said drive belt running in an endless path between said drive member and said article transfer member and drivingly engaged by a belt drive wheel driven by said drive member;

a rigid guide member carried by said article transfer member, said drive belt supported by and movable along said guide member, said guide member, carried by a pivotally mounted guide member support having oppositely extending guide arms movable in guide ways in said first and second conveyors;

a belt tensioning device carried by said drive member around which said drive belt runs; and

a linkage member interconnected between said belt tensioning device and said guide member such that pivotal movement of said guide member as said transport member moves along curves defined by said conveyors is imparted to said belt tensioning device to change belt position so that a relatively constant article conveying speed of said drive belt is maintained through said curves.

21. The apparatus as in claim 20, wherein said belt tensioning device comprises at least two belt guides around which said drive belt runs, said belt guides pivotally mounted relative to each other and interconnected by a spring device.

22. The apparatus as in claim 20, wherein said article transfer member is mounted on a rear support plate and said drive member is mounted on a front support plate, said front and rear support plates pivotal at a common pivot point.

23. The apparatus as in claim 20, wherein said article transfer member further comprises an idler wheel, said transfer path defined between said drive belt and a circumferential portion of said idler wheel, and said drive member further comprises a drive wheel simultaneously engaged by drive lugs on each of said conveyors so as to continuously rotate so long as at least one of said conveyors is moving.

24. The apparatus as in claim 23, wherein said article transfer member further comprises a dead plate disposed so as to extend between said conveyors along said transfer path, said dead plate carried by a dead plate support that is also pivotally mounted at said common pivot point.

25. The apparatus as in claim 24, wherein said dead plate support and said front and rear support plates are operably connected by a gear mechanism so that pivotal movement of either of said front and rear support plates is transferred to said dead plate support as said article transfer member moves along curves defined by said conveyors.

26. The apparatus as in claim 25, wherein said gear mechanism has a different gear ratio between said front and rear support plates than for said dead plate support, said gear ratio for said dead plate support selected so that said dead plate remains substantially perpendicular to said conveyors as said article transfer member moves along curves defined by said conveyors.

27. The apparatus as in claim 26, wherein said gear mechanism is mounted to said front support plate and comprises a first gear engaged with said rear support plate and a second gear engaged with said dead plate support.