Method and system for automated transport of items

1. An automated guided vehicle comprising:

a frame forming a payload area;

a vacuum case transfer mechanism having one or more degrees of freedom and configured dependent to and extending from the payload area along an extension axis to vacuum-couple with a case; and

a friction case transfer mechanism that is dependent and configured to extend from the payload area along the extension axis independent of the vacuum case transfer mechanism to grip the case and at least cooperate with the vacuum case transfer mechanism to effect transfer of the case to the payload area.

2. The automated guided vehicle of claim 1 , wherein the vacuum case transfer mechanism includes one or more of a vacuum suction cup and a vacuum suction pad.

3. The automated guided vehicle of claim 1 , wherein the friction case transfer mechanism includes one or more of a driven roller, a conveyor belt, and actuable gripping members.

4. The automated guided vehicle of claim 1 , wherein the friction case transfer mechanism includes actuable gripping members that pivot to engage one or more sides of the case.

5. The automated guided vehicle of claim 4 , wherein the actuable gripping members are configured to position the case relative to a centerline of the payload area.

6. The automated guided vehicle of claim 1 , wherein the vacuum case transfer mechanism includes a vacuum gripping member configured to extend from and retract into the payload area.

7. The automated guided vehicle of claim 1 , wherein the friction case transfer mechanism includes a friction gripper configured to extend from and retract into the payload area.

8. The automated guided vehicle of claim 1 , wherein:

the vacuum case transfer mechanism includes a vacuum gripping member configured to extend and retract relative to the frame; and

the friction case transfer mechanism includes a friction gripper configured to extend and retract relative to the frame;

where the vacuum gripping member is configured to extend and retract relative to the frame independent of extension and retraction of the friction gripper and the friction gripper is configured to extend and retract relative to the frame independent of extension and retraction of the vacuum gripping member.

9. The automated guided vehicle of claim 1 , wherein the friction case transfer mechanism comprises:

a friction gripper; and

a resilient coupling configured to bias the friction gripper towards a centerline of the payload area.

10. The automated guided vehicle of claim 1 , wherein:

the vacuum case transfer mechanism includes a vacuum gripping member configured to extend and retract relative to the frame;

the friction case transfer mechanism includes a friction gripper configured to extend and retract relative to the frame; and

the automated guided vehicle further comprises a lift axis drive configured to lift one or more of the vacuum gripping member and the friction gripper relative to the frame.

11. A method for transferring cases with an automated guided vehicle, the method comprising:

vacuum-coupling a case to a vacuum case transfer mechanism of the automated guided vehicle the vacuum case transfer mechanism dependent to and extending from the payload area along an extension axis; and

gripping the case with a friction case transfer mechanism of the automated guided vehicle, where the friction case transfer mechanism is dependent to and extends from the payload area along the extension axis independent of the vacuum case transfer mechanism to at least cooperates with the vacuum case transfer mechanism to effect transferring the case to a payload area of the automated guided vehicle.

12. The method of claim 11 , wherein the friction case transfer mechanism and the vacuum case transfer mechanism cooperate with each other so as to transfer the case to the payload area substantially regardless of any loss of suction between the vacuum case transfer mechanism and the case.

13. The method of claim 11 , wherein the case is gripped by the vacuum case transfer mechanism by one or more of a vacuum suction cup and a vacuum suction pad.

14. The method of claim 11 , wherein the case is gripped by the friction case transfer mechanism by one or more of a driven roller, a conveyor belt, and actuable gripping members.

15. The method of claim 11 , further comprising positioning the case relative to a centerline of the payload area with the actuable gripping members.

16. A method of transferring cases with an automated guided vehicle, the method comprising:

providing cases on a storage shelf, where the cases are positioned relative to each other on the storage shelf in a tightly packed storage density;

vacuum-coupling a case to a vacuum case transfer mechanism dependent to and extending from the payload area along an extension axis of the automated guided vehicle to expose sides of the coupled case; and

gripping at least the lateral sides of the coupled case with a friction case transfer mechanism of the automated guided vehicle that is dependent to and extends from the payload area along the extension axis independent of the vacuum case transfer mechanism.

17. The method of claim 16 , the friction case transfer mechanism and the vacuum case transfer mechanism cooperate with each other so as to transfer the case to the payload area substantially regardless of any loss of suction between the vacuum case transfer mechanism and the case.

18. The method of claim 16 , wherein the case is gripped by the vacuum case transfer mechanism by one or more of a vacuum suction cup and a vacuum suction pad.

19. The method of claim 16 , wherein the case is gripped by the friction case transfer mechanism by one or more of a driven roller, a conveyor belt, and actuable gripping members.

20. The method of claim 16 , further comprising positioning the case relative to a centerline of the payload area with the actuable gripping members.