Modular automated inventory sorting and retrieving

• US 10,217,074 B1
• Filed: 08/29/2017
• Issued: 02/26/2019
• Est. Priority Date: 08/29/2017
• Status: Active Grant

• Current Assignee: Amazon Technologies, Inc. (Amazon.com, Inc.)
• Original Assignee: Amazon Technologies, Inc. (Amazon.com, Inc.)
• Inventors: Stallman, Timothy, Brady, Tye Michael, Bocamazo, Michael Robert, Borges, Mafalda Ghira, Davidson, Harris Scott, Johnson, Anders Richard, Rodrigues, Abigail Phyllis, Tieu, Mindy
• Primary Examiner(s): Matthews, Terrell H
• Application Number:
  US15/690,051
• Time in Patent Office: 546 Days
• Field of Search: 209552
• CPC Class Codes: B65G 1/1378 the orders being assembled on fixed commissioning areas remote from the storage areas
• CPC Class Codes: G06Q 10/08 Logistics, e.g. warehousing, loading or distribution; Inventory or stock management

Abstract

A modular sorting station includes a frame defining an inbound bay and an outbound bay, each of the inbound and outbound bays being sized to receive an inventory holder containing inventory thereon. A robotic grasper is mounted to the frame and positioned above one of the inbound and outbound bays and operable to transfer inventory items from the inbound bay to the outbound bay, and a sensor mounted to one of the frame or robotic grasper and operable to identify inventory at the inbound bay when the inventory holder is present in the inbound bay. The frame is sized and arranged to align with a material handling grid and permit drive units to transport inventory holders into and out of the inbound bay and/or outbound bays while moving along the material handling grid; and the frame is portable such that the modular sorting station can be moved as a modular unit for rapid deployment.

Claims

1. An inventory management system, comprising:

a workspace;

a plurality of drive units operable to navigate the workspace; and

a plurality of inventory holders capable of supporting inventory thereon and capable of being transported by the one or more drive units;

a drive unit-navigable grid in the workspace and defining areas where the drive units can navigate;

a modular sorting station comprising;

a frame defining a first inbound bay and a first outbound bay, wherein each bay is sized to accommodate a drive unit of the one or more drive units with a supported inventory holder containing inventory, and wherein each bay is aligned with the drive unit-navigable grid;

a sensor connected with the modular sorting station and operable to identify the inventory;

a unique identifier associated with the modular sorting station; and

a robotic grasper operable to grasp inventory from the inbound bay and release the inventory at the outbound bay;

wherein the robotic grasper further comprises at least two robotic arms mounted to respective gantries above the inbound and outbound bays defined by the frame and

a management component configured with executable instructions, in order to, at least;

maintain a virtual representation of the workspace including a first grid position associated with the unique identifier of the modular sorting station;

receive information relating to an inventory item in the inventory system;

instruct a first drive unit of the one or more drive units to retrieve a first inventory holder containing the inventory item;

instruct the first drive unit to transport the first inventory holder to the inbound bay of the modular sorting station based on the grid position associated with the unique identifier of the modular sorting station;

sense, via the sensor, the inventory item in the first inventory holder; and

cause the robotic grasper to move the inventory item from the first inventory holder to the outbound bay of the modular sorting station.

2. The system of claim 1, wherein the modular sorting station is an initial modular sorting station, and further comprising:

a secondary modular sorting station, comprising;

a second frame defining a second inbound bay and a second outbound bay;

a second sensor connected with the secondary modular sorting station and operable to detect the inventory when the inventory is positioned in the second inbound bay;

a second unique identifier associated with the secondary modular sorting station and a second robotic grasper operable to grasp inventory from the second inbound bay and release the inventory at the second outbound bay;

wherein the management component is further configured to;

maintain the virtual representation of the workspace including a second grid position associated with the second unique identifier of the secondary modular sorting station;

instruct a second drive unit of the plurality of drive units to transport a second inventory holder to the first outbound bay of the first modular sorting station based on the first grid position associated with the unique identifier of the modular sorting station before the robotic grasper moves the inventory item, such that the inventory item is received in the second inventory holder when the inventory item is moved to the first outbound bay;

instruct the second drive unit to transport the second inventory holder containing the inventory item to the second inbound bay of the secondary modular sorting station based on the second grid position associated with the secondary modular sorting station;

sense, via the second sensor, the inventory item in the second inventory holder; and

cause the second robotic grasper to move the inventory item from the second inventory holder to the second outbound bay of the secondary modular sorting station.

3. The system of claim 1, further comprising:

a conveyance positioned in the outbound bay of the frame and operable to transport items placed thereon, so that causing the robotic grasper to move the inventory item to the outbound bay causes the inventory item to be placed on the conveyance.

4. The system of claim 1, further comprising:

a second inventory holder positioned in the outbound bay of the frame and operable to connect with a drive unit of the one or more drive units, so that causing the robotic grasper to move the inventory item to the outbound bay causes the inventory item to be placed in the secondary inventory holder.

5. The system of claim 1, wherein the first inventory holder comprises:

a mobile stage comprising a platform and a plurality of supportive legs spaced apart to allow the drive unit to pass therebetween to pass under or to lift the first inventory holder; and

a plurality of containers arrayed on the mobile stage and accessible from above.

6. A modular sorting station, comprising:

a frame defining an inbound bay and an outbound bay, each of the inbound and outbound bays being sized to receive an inventory holder containing inventory thereon;

a robotic grasper mounted to the frame and positioned above one of the inbound and outbound bays and operable to transfer inventory items from the inbound bay to the outbound bay; and

a sensor mounted to one of the frame or robotic grasper and operable to identify inventory at the inbound bay when the inventory holder is present in the inbound bay;

wherein;

the frame is arranged to align with a material handling grid and sized to permit a drive unit to transit into or out of the inbound bay while carrying the inventory holder from at least two directions along the material handling grid;

the frame is portable such that the modular sorting station can be moved as a modular unit; and

the modular sorting station has a unique identifier suitable for association with a position in a drive unit-navigable grid in a virtual representation of a workspace, wherein the robotic grasper further comprises at least two robotic arms mounted to respective gantries above the inbound and outbound bays defined by the frame.

7. The modular sorting station of claim 6, further comprising an auxiliary container connected with the frame and positioned adjacent the inbound bay and configured for receiving inventory items from the robotic grasper.

8. The modular sorting station of claim 7, wherein the auxiliary container is supported by the frame above a level of the drive unit such that the drive unit can tunnel freely underneath the auxiliary container.

9. The modular sorting station of claim 7, wherein the auxiliary container comprises a linking conveyance element configured to transport inventory into or out of the modular sorting station.

10. The modular sorting station of claim 6, wherein the sensor comprises at least one optical sensor capable of reading identifying information from an inventory item in the inventory holder when the inventory holder is present in the inbound bay.

11. The modular sorting station of claim 6, wherein the robotic arms are arranged to operate across different segments of the inbound bay.

12. The modular sorting station of claim 6, wherein the frame comprises at least four legs positioned in a spaced apart manner and disconnected near ground level to at least a height associated with the drive unit when the drive unit is carrying the inventory holder, such that the drive unit can readily pass into or out of at least one of the inbound bay or the outbound bay of the frame while carrying the inventory holder.

13. The modular sorting station of claim 12, further comprising a plurality of wheels for facilitating the movement of the modular sorting station, and at least one securement feature for releasably immobilizing the modular sorting station.