Conveyor having a conveyor belt with flights, including segmented flights for gapless end transfer

• US 7,506,750 B2
• Filed: 01/02/2006
• Issued: 03/24/2009
• Est. Priority Date: 01/03/2005
• Status: Active Grant

• Current Assignee: Laitram LLC
• Original Assignee: Laitram LLC
• Inventors: Pressler, Eric M., Costanzo, Mark
• Primary Examiner(s): Deuble; Mark A
• Application Number:
  US11/306,554
• Publication Number:
  US 20060207862A1
• Time in Patent Office: 1,177 Days
• Field of Search: 198/779, 198/698, 198/697, 198/600
• US Class Current: 198/779
• 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 2201/02 Articles
• CPC Class Codes: B65G 47/66 Fixed platforms or combs, e.g. bridges between conveyors

Abstract

A conveyor having a flighted belt and providing a gapless end-off or end-on transfer of articles. The conveyor belt includes segmented flights at spaced intervals along its length. Each segmented flight includes slots dividing the flight into laterally spaced segments, or dogs. A transfer platform allows for a smooth transfer of articles onto or off the end of the belt. Fingers on the transfer platform separated by gaps extend to distal finger tips that are positioned close to the conveying surface of the belt at an end of the conveyor. The transfer platform is laterally aligned with the gaps positioned to coincide with the flight segments to permit them to pass cleanly through as the belt articulates about a sprocket set at the end of a carryway. The transfer platform may be tilted relative to vertical to gain an assist from gravity in transferring articles. Alternatively, a retractable rake mechanism including a tined rake belt positioned above the end of the conveyor belt is used to comb through the segmented flights to sweep articles off the end of the conveyor belt and across the transfer platform. Optional article-advancing rollers in the conveyor belt between consecutive flights propel articles forward along the belt to a forward flight.

Claims

1. A conveyor belt comprising:

an endless conveyor belt loop extending longitudinally in a direction of belt travel, laterally from a first side to a second side, and in thickness from a bottom to a top surface;

a plurality of flights upstanding from the top surface outward to a top edge and extending laterally across the conveyor belt at longitudinally spaced intervals to form bins between consecutive flights;

a plurality of rollers arranged in longitudinally spaced lateral rows of rollers extending through the thickness of the conveyor belt past the top and bottom surfaces between consecutive flights to support articles conveyed along the top surface.

2. A conveyor belt as in claim 1 wherein each flight forms a plurality of flight segments laterally spaced by slots extending from the top edge of the flight toward the top surface of the conveyor belt, wherein each flight segment has a lateral width and a longitudinal length less than the lateral width.

3. A conveyor belt as in claim 1 wherein the rollers are arranged to rotate on lateral axes to propel conveyed articles in the direction of belt travel.

4. A conveyor comprising:

a modular conveyor belt comprising;

a series of rows of one or more belt modules, each row extending longitudinally in the direction of belt travel from a first end to a second end, laterally from a first side to a second side, and in thickness from a bottom to a top surface, with consecutive rows connected together end to end at a hinge joint to form an endless conveyor belt loop,

a plurality of flights upstanding from the top surface of separate rows to a top edge and extending laterally at least partway across the rows to divide the modular conveyor belt into individual bins between consecutive flights, wherein the flights form laterally spaced slots extending from the top edge toward the top surface of the row to divide the flight into flight segments;

a conveyor frame supporting the conveyor belt loop for travel along a carryway and an opposite returnway between opposite ends of the conveyor;

a transfer platform disposed at an end of the conveyor across which conveyed articles transfer between the modular conveyor belt and the transfer platform comprising;

a plate,

a plurality of laterally spaced fingers separated by gaps and extending from the plate to distal finger tips,

wherein the finger tips are disposed proximate the modular conveyor belt at the end of the conveyor with the slots in the flights spaced apart laterally to coincide with the fingers; and

a rake mechanism including;

a rake belt positioned to advance in the direction of belt travel outward of the top surface of the modular conveyor belt along the carryway, the rake belt including;

one or more rakes extending outward of an outer surface of the rake belt;

wherein each rake has a plurality of laterally spaced tines;

wherein the rake belt is aligned laterally relative to the modular conveyor belt with the tines of the rake laterally aligned with the slots in the flights.

5. A conveyor as in claim 4 wherein the fingers have top finger surfaces generally defining a plane at or slightly below the level of the top surface of the modular conveyor belt on the carryway.

6. A conveyor as in claim 4 comprising a second transfer platform at the other end of the conveyor.

7. A conveyor as in claim 4 wherein the modular conveyor belt further comprises a plurality of rollers in at least some of the rows, the rollers protruding outward of the bottom and top surface of the belt, and wherein the conveyor comprises a bearing surface underlying the rollers proximate the bottom of the belt along the carryway at the end of the conveyor proximate the transfer platform to provide a surface along which the rollers rotate to propel conveyed articles along the top surface of the belt in the direction of belt travel and onto the transfer platform.

8. A conveyor as in claim 4 wherein the transfer platform is tilted relative to horizontal.

9. A conveyor as in claim 4 wherein the modular conveyor belt at the end of the conveyor proximate the transfer platform is tilted relative to horizontal.

10. A conveyor as in claim 4 wherein the rake belt advances in the direction of belt travel at least as fast as the modular conveyor belt.

11. A conveyor as in claim 4 wherein the rake mechanism is movable between a first retracted position away from the modular conveyor belt and a second position closer to the top surface of the modular conveyor belt along the carryway to enable the rake belt to sweep conveyed articles from the modular conveyor belt.

12. A modular conveyor belt comprising:

a series of rows of one or more belt modules, each row extending longitudinally in the direction of belt travel from a first end to a second end, laterally from a first side to a second side, and in thickness from a bottom to a top surface, with consecutive rows connected together end to end at a hinge joint to form an endless conveyor belt loop;

a plurality of flights upstanding from the top surface of separate rows to a top edge and extending laterally at least partway across the rows to divide the modular conveyor belt into individual bins between consecutive flights, wherein the flights form laterally spaced slots extending from the top edge toward the top surface of the row to divide the flight into laterally spaced flight segments; and

a plurality of rollers in at least some of the rows, the rollers protruding outward of the bottom and top surface of the belt.

13. A modular conveyor belt as in claim 12 wherein the modular conveyor belt further includes laterally spaced longitudinal raised ribs upstanding from the top surface.

14. A conveyor belt module comprising:

a module body extending longitudinally from a first end to a second end, laterally from a first side to a second side, and in thickness from a bottom to a top surface;

hinge members spaced apart laterally along the first and second ends;

a flight upstanding from the top surface of the module body to a top edge extending laterally across the module body, wherein the flights form laterally spaced slots extending from the top edge toward the top surface of the row to divide the flight into laterally spaced flight segments; and

a plurality of rollers laterally spaced apart across the module body, the rollers protruding outward of the bottom and the top surface.

15. A conveyor comprising:

a modular conveyor belt comprising;

a series of rows of one or more belt modules, each row extending longitudinally in the direction of belt travel from a first end to a second end, laterally from a first side to a second side, and in thickness from a bottom to a top surface, with consecutive rows connected together end to end at a hinge joint to form an endless conveyor belt loop,

a plurality of dogs upstanding from the top surface of at least one of the rows and spaced apart laterally across slots, each dog having a longitudinal dimension and a lateral dimension greater than the longitudinal dimension;

a conveyor frame supporting the conveyor belt loop for travel along a carryway and an opposite returnway between opposite ends of the conveyor;

a transfer platform disposed at an end of the conveyor across which conveyed articles transfer between the modular conveyor belt and the transfer platform comprising;

a plurality of laterally spaced fingers separated by gaps,

wherein the fingers extend toward the top surface of the belt at the end of the conveyor with the dogs spaced apart laterally to coincide with the gaps; and

a plurality of rollers in at least some of the rows, the rollers protruding outward of the bottom and top surface of the belt, and wherein the conveyor comprises a bearing surface underlying the rollers proximate the bottom of the belt along the carryway at the end of the conveyor proximate the transfer platform to provide a surface along which the rollers rotate to propel conveyed articles along the top surface of the belt in the direction of belt travel and onto the transfer platform.

16. A conveyor as in claim 15 wherein the dogs are laterally wider than the fingers.

17. A conveyor as in claim 15 wherein the fingers have top finger surfaces generally defining a plane at or slightly below the level of the top surface of the modular conveyor belt on the carryway.

18. A conveyor as in claim 15 wherein the modular conveyor belt further includes laterally spaced longitudinal raised ribs upstanding from the top surface.

19. A modular conveyor belt comprising:

a series of rows of one or more belt modules, each row extending longitudinally in the direction of belt travel from a first end to a second end, laterally from a first side to a second side, and in thickness from a bottom to a top surface, with consecutive rows connected together end to end at a hinge joint to form an endless conveyor belt loop;

a plurality of dogs upstanding from the top surface of at least one of the rows and spaced apart laterally across slots, each dog having a longitudinal dimension and a lateral dimension greater than the longitudinal dimension; and

a plurality of rollers in at least some of the rows arranged to rotate about lateral axes and having salient portions protruding outward of the bottom and top surface.

20. A modular conveyor belt as in claim 19 wherein all the dogs extend from the top surface to the same height.

21. A modular conveyor belt as in claim 20 wherein the height of the dogs is greater than the lateral dimension of the dogs.

22. A modular conveyor belt as in claim 19 wherein each dog has a first face nearer the first end of the row and an opposite second face nearer the second end and wherein the first faces of all the dogs in a row are coplanar and the second faces of all the dogs in a row are coplanar.

23. A conveyor belt module comprising:

a module body extending longitudinally from a first end to a second end, laterally from a first side to a second side, and in thickness from a bottom to a top surface;

hinge members spaced apart laterally along the first and second ends;

a plurality of dogs upstanding from the top surface and spaced apart laterally across slots, each dog having a longitudinal dimension and a lateral dimension greater than the longitudinal dimension; and

a plurality of rollers arranged to rotate about lateral axes and having salient portions extending outward of the bottom and top surface.

24. A conveyor belt module as in claim 23 wherein all the dogs extend from the top surface to the same height.

25. A conveyor belt module as in claim 24 wherein the height of the dogs is greater than the lateral dimension of the dogs.

26. A conveyor belt module as in claim 23 wherein each dog has a first face nearer the first end of the module body and an opposite second face nearer the second end and wherein the first faces of all the dogs in a row are coplanar and the second faces of all the dogs in a row are coplanar.

27. A modular conveyor belt comprising:

a series of rows of one or more belt modules, each row extending longitudinally in the direction of belt travel from a first end to a second end, laterally from a first side to a second side, and in thickness from a bottom to a top surface, with consecutive rows connected together end to end at a hinge joint to form an endless conveyor belt loop;

a flight upstanding from the top surface of at least one of the rows to a top edge at a height above the top surface and extending laterally across the row and forming a plurality of lateral flight segments laterally spaced by slots extending from the top edge of the flight toward the top surface of the row;

wherein each flight segment has a lateral width and a longitudinal length less than the lateral width; and

a plurality of rollers in at least some of the rows arranged to rotate about lateral axes and having salient portions protruding outward of the bottom and top surface.

28. A modular conveyor belt as in claim 27 wherein the top edge of the flight is parallel to the top surface.

29. A conveyor belt module comprising:

a module body extending longitudinally from a first end to a second end, laterally from a first side to a second side, and in thickness from a bottom to a top surface;

hinge members spaced apart laterally along the first and second ends;

a flight upstanding from the top surface to a top edge at a height above the top surface and extending laterally across the module body and forming a plurality of flight segments laterally spaced by slots extending from the top edge of the flight toward the top surface;

wherein each flight segment has a lateral width and a longitudinal length less than the lateral width; and

a plurality of rollers arranged to rotate about lateral axes and having salient portions extending outward of the bottom and top surface.

30. A conveyor belt module as in claim 29 wherein the top edge of the flight is parallel to the top surface.