Conveyor belt for mounting oblique rollers on lateral rods

• US 7,891,481 B2
• Filed: 09/11/2008
• Issued: 02/22/2011
• Est. Priority Date: 09/11/2008
• Status: Active Grant

• Current Assignee: Laitram LLC
• Original Assignee: Laitram LLC
• Inventors: Fourney, Matthew L., Pressler, Eric M.
• Primary Examiner(s): DILLON JR, JOSEPH A
• Application Number:
  US12/208,913
• Publication Number:
  US 20100059338A1
• Time in Patent Office: 894 Days
• Field of Search: 198/779, 198/853
• 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 17/40 Chains acting as load-carriers

Abstract

A conveyor belt and a method for providing a conveyor belt with rollers that rotate on axes oblique to the direction of belt travel. Axles are mounted on rods extending perpendicular to direction of belt travel. The axles have cylindrical outer bearing surfaces that define a central axis that is oblique to the direction of belt travel when mounted on the rods. Rollers mounted on the axles rotate on the outer bearing surfaces in a direction oblique to the direction of belt travel.

Claims

1. A conveyor belt comprising:

a plurality of rods disposed perpendicular to a direction of belt travel;

a plurality of axles, each of the axles mounted on a corresponding one of the rods and having a cylindrical outer bearing surface defining a central axis oblique to the direction of belt travel;

a plurality of rollers, each of the rollers mounted on a corresponding one of the axles for rotation on the outer bearing surface about the central axis of the corresponding one of the axles;

wherein each of the axles has a bore oblique to the central axis for receiving the corresponding one of the rods.

2. A conveyor belt as in claim 1 further comprising a conveying surface and an opposite surface across the thickness of the conveyor belt and a plurality of openings through the thickness of the conveyor belt opening onto at least one of the conveying and opposite surfaces, wherein each of the openings is traversed by one of the rods.

3. A conveyor belt as in claim 2 wherein the axles have interfering structure at an end that interferes with the conveyor belt at the openings to prevent the axles from rotating on the rods.

4. A conveyor belt as in claim 3 wherein the interfering structure of the axles includes a flat surface and wherein the conveyor belt includes a tab having a flat side that engages with the flat surface to prevent the axles from rotating on the rods.

5. A conveyor belt as in claim 2 wherein the rollers protrude outward past the conveying and opposite surfaces of the belt.

6. A conveyor belt as in claim 1 wherein the axles have sleeves protruding outward from the axles to form a continuation of the bore at each end.

7. A conveyor belt as in claim 6 further comprising keyed recesses formed in the conveyor belt around the rods and opening into the openings and wherein the sleeves have key structure that mates with the recesses to prevent the axles from rotating on the rods.

8. A conveyor belt as in claim 1 wherein the rods are uniformly spaced hinge rods extending across the width of the conveyor belt and forming hinge joints at which the conveyor belt articulates.

9. A conveyor belt as in claim 1 wherein the axles have a flange at one end.

10. A conveyor belt as in claim 1 wherein the axles comprise two mating portions.

11. A conveyor belt comprising:

a plurality of belt modules arranged in a series of rows, each row having spaced apart hinge elements with aligned apertures along leading and trailing ends with the hinge elements along the leading end of a row interleaved with the hinge elements along the trailing end of a leading row to form a lateral passageway between consecutive rows perpendicular to a direction of belt travel;

a plurality of hinge rods, each received in one of the lateral passageways to connect the rows into an endless belt;

wherein the hinge elements are spaced apart non-uniformly along each end of the rows to provide one or more large openings disposed between laterally consecutive interleaved hinge elements and traversed by the hinge rod;

a plurality of axles, each of the axles disposed in a corresponding one of the large openings and having a cylindrical outer bearing surface defining a central axis and having a bore oblique to the central axis, the bore receiving a corresponding one of the hinge rods;

a plurality of rollers, each of the rollers mounted on a corresponding one of the axles for rotation on the outer bearing surface about the central axis of the corresponding one of the axles.

12. A conveyor belt as in claim 11 wherein the axles include a flange at one end to restrict the translation of the rollers along the central axis of the axles.

13. A conveyor belt as in claim 11 wherein the axles have sleeves protruding outward from the axles to form a continuation of the bore at each end.

14. A conveyor belt as in claim 13 further comprising keyed recesses formed in the sides of the hinge elements bounding the openings around the passageway and opening into the openings and wherein the sleeves have key structure that mates with the recesses to prevent the axles from rotating on the rods.

15. A conveyor belt as in claim 11 wherein the axles include a flat surface at one end and wherein the belt modules include tabs having a flat side protruding into the openings that engages with the flat surface to prevent the axles from rotating on the rods.

16. A conveyor belt as in claim 11 wherein the axles comprise two mating portions.