Object repositioning system

• US 8,100,252 B2
• Filed: 12/14/2007
• Issued: 01/24/2012
• Est. Priority Date: 12/14/2006
• Status: Expired due to Fees

• Current Assignee: Laitram LLC
• Original Assignee: Laitram LLC
• Inventors: Fourney, Matthew L.
• Primary Examiner(s): HESS, DOUGLAS A
• Application Number:
  US12/518,583
• Publication Number:
  US 20100096242A1
• Time in Patent Office: 1,502 Days
• Field of Search: 198/443, 198/444, 198/453, 198/454, 198/455, 198/457.06, 198/597
• US Class Current: 198/444
• CPC Class Codes: B65G 47/22 Devices influencing the relative position or the attitude of articles during transit by conveyors during feeding B65G47/14

Abstract

In one embodiment, an object repositioning system configured for use in association with a conveyor includes opposed gates positioned over the conveyor and oriented in an initial partially-closed position in which the gates define an opening through which objects conveyed by the conveyor can pass that is narrower than a width of the conveyor, a locking mechanism configured to lock the gates in the initial partially-closed position, and an actuation mechanism configured to release the locking mechanism to enable the gates to pivot when an object conveyed by the conveyor contacts both of the gates at the same time.

Claims

1. An object repositioning system configured for use in association with a conveyor, the object repositioning system comprising:

opposed gates positioned over the conveyor and oriented in an initial partially-closed position in which the gates define an opening through which objects conveyed by the conveyor can pass that is narrower than a width of the conveyor;

a locking mechanism configured to lock the gates in the initial partially-closed position; and

an actuation mechanism configured to release the locking mechanism to enable the gates to pivot when an object conveyed by the conveyor contacts both of the gates at the same time, wherein the gates are not motor driven and pivot only in response to forward movement of the object along the conveyor.

2. The system of claim 1, wherein the opposed gates comprise a pair of opposed gates.

3. The system of claim 1, wherein the opposed gates each forms an acute angle with a transverse direction of the conveyor when the gates are in the initial partially-closed position.

4. The system of claim 1, wherein each gate is mounted on a shaft about which each gate can pivot.

5. The system of claim 1, further comprising a linkage coupled to the gates that is configured to enable synchronous movement of the gates when the locking mechanism is released.

6. The system of claim 5, wherein the linkage comprises gear boxes coupled to shafts on which the gates are mounted and a torque shaft that extends between the gear boxes, wherein rotation of one of the gates causes substantially equal and opposite rotation of the other gate.

7. The system of claim 1, wherein the locking mechanism comprises a first locking mechanism associated with a first gate and a second locking mechanism associated with a second gate.

8. The system of claim 7, wherein the first and second locking mechanisms each comprise a cam that impedes rotation of its associated gate when placed in a first position and enables rotation of its associated door when placed in a second position.

9. The system of claim 8, wherein the actuation mechanism comprises first and second actuation mechanisms associated with the first and second gates, respectively, each of the first and second actuation mechanisms comprising an actuation lever configured to move its associated cam from the first position to the second position.

10. The system of claim 1, wherein the actuation mechanism comprises trigger plates provided on interior faces of the gates, wherein the locking mechanism is released when each trigger plate is activated.

11. The system of claim 10, further comprising linking members with which the trigger plates are pivotally mounted to frames of the gates and springs that bias the trigger plates toward an extended position, wherein each trigger plate is configured to displace inward toward its associated gate frame against the force of its associated spring when an object applies force against the trigger plates.

12. The system of claim 1, further comprising a spring that returns the gates to the initial partially-closed position after an object that released the locking mechanism has passed the object repositioning system.

13. The system of claim 12, wherein the locking mechanism is configured to automatically re-lock once the gates have returned to the initial partially-closed position.

14. An object repositioning system configured for use in association with a conveyor, the object repositioning system comprising:

a pair of opposed gates mounted on pivot shafts and positioned over the conveyor, the gates being oriented in an initial partially-closed position in which the gates define an opening through which objects conveyed by the conveyor can pass that is narrower than a width of the conveyor;

a locking mechanism associated with each gate, each locking mechanism being configured to lock its associated gate while in the initial partially-closed position;

an actuation mechanism associated with each gate, each actuation mechanism being configured to release the locking mechanism of its associated gate to enable the gate to pivot when an object conveyed by the conveyor contacts the gate, wherein the gates are not motor driven and pivot only in response to forward movement of the object along the conveyor; and

a synchronous movement linkage to which both gates are coupled, the synchronous movement linkage being configured to control the gates so that the gates can only pivot in synchrony with each other such that when the locking mechanism of one of the gates has been released, the gate will not be able to pivot unless the locking mechanism of the other gate has also been released.

15. The system of claim 14, wherein the first and second locking mechanisms each comprise a cam that impedes rotation of its associated gate when placed in a first position and enables rotation of its associated gate when placed in a second position.

16. The system of claim 15, wherein the actuation mechanisms each comprise an actuation lever configured to move the cam of its associated locking mechanism from the first position to the second position.

17. The system of claim 16, wherein the actuation mechanisms each comprise a trigger plate provided on interior faces of the gates, wherein compression of the trigger plates causes movement of the actuation levers.

18. The system of claim 15, further comprising a spring that returns the gates to the initial partially-closed position after an object that released the gates has passed the object repositioning system.

19. The system of claim 18, wherein the locking mechanisms are configured to automatically re-lock once the gates have returned to the initial partially-closed position.

20. A method for repositioning objects, the method comprising:

conveying objects with a conveyor toward an object repositioning system;

limiting passage of the objects to an initial opening defined by opposed gates of the object repositioning system, the initial opening being narrower than a width of the conveyor; and

releasing the gates when an object having a dimension greater than the width of the initial opening presses against each gate at the same time such that the gates can pivot outward under the force of the object to increase the width of the opening and enable the object to pass

wherein the gates are not motor driven and pivot only in response to forward movement of the object along the conveyor.

21. The method of claim 20, wherein limiting passage of the objects comprises locking the gates such that they cannot pivot.

22. The method of claim 20, wherein releasing the gates comprises releasing a locking mechanism configured to lock the gates in the initial partially-closed position.

23. The method of claim 22, wherein releasing a locking mechanism comprises releasing the locking mechanism using an actuation mechanism integrated with the gates.

24. The method of claim 23, wherein releasing the locking mechanism using an actuation mechanism comprises releasing the locking mechanism when trigger plates provided on interior faces of the gates are activated by forces applied by the object at the same time.

25. The method of claim 20, further comprising enabling the gates to pivot in synchrony when released.

26. The method of claim 20, further comprising returning the gates to an initial partially-closed position after the object has passed the object repositioning system.

27. The method of claim 26, further comprising automatically locking the gates after they have returned to the initial partially-closed position.