Automatic apparatus for storing and dispensing packaged medication and other small elements

• US 7,588,167 B2
• Filed: 07/18/2007
• Issued: 09/15/2009
• Est. Priority Date: 08/30/2002
• Status: Expired due to Term

• Current Assignee: Omnicell Incorporated
• Original Assignee: Omnicell Incorporated
• Inventors: Park, William C. IV, Hunter, Steven N. W., Fuhrman, Dennis J., Browning, David M.
• Primary Examiner(s): Bollinger; David H
• Application Number:
  US11/779,788
• Publication Number:
  US 20080006647A1
• Time in Patent Office: 790 Days
• Field of Search: 414/331.01, 414/331.02, 414/331.05, 414/331.03, 414/331.04, 221/79, 221/87, 221/88, 221/120, 221/119, 221/9, 209/583, 209/587
• US Class Current: 221/79
• CPC Class Codes: B65G 1/0435 with pulling or pushing means on either stacking crane or stacking area
• CPC Class Codes: B65G 1/1373 for fulfilling orders in warehouses
• CPC Class Codes: B65G 1/1378 the orders being assembled on fixed commissioning areas remote from the storage areas
• CPC Class Codes: B65G 25/02 the carrier or impeller having different forward and return paths of movement, e.g. walking beam conveyors
• CPC Class Codes: G07F 11/24 Rotary or oscillatory members
• CPC Class Codes: G07F 11/26 Endless bands
• CPC Class Codes: G07F 11/44 in which magazines the articles are stored in bulk
• CPC Class Codes: G07F 11/54 about vertical axes
• CPC Class Codes: G07F 11/58 the articles being supported on or by endless belts or like conveyors
• CPC Class Codes: G07F 11/62 in which the articles are stored in compartments in fixed receptacles
• CPC Class Codes: G07F 17/0092 for assembling and dispensing of pharmaceutical articles medical dispensers for private use, A61J7/00

Abstract

The system includes a bin hopper which temporarily stores a plurality of small elements, such as medications. The elements are moved out of the bin and singulated into a one-by-one sequence by a series of singulating conveyors. The resulting sequence of elements is moved onto a main system conveyor where the element is identified and then moved to a loading mechanism which arranges the item so it is ready to be gripped and stored. The system includes a mass storage apparatus comprising a series of four upstanding cylindrical drums, each having a plurality of individually accessible and addressable cell storage locations for the elements. A gripping apparatus removes the elements from the loading mechanism and transfers them to a selected location in a cylindrical drum. When an article is to be dispensed, the drum is rotated so that an ejection arm comes adjacent the desired location in the drum. The ejector arm is actuated, pushing the small element out of its slot, into the center of the drum, where it falls onto a conveyor which moves the dispensed item from the system.

Claims

1. A system for automatically storing and dispensing individual elements, comprising:

a bin for temporarily storing a plurality of individual elements;

apparatus for singulating the individual elements and for depositing them one by one onto a system conveyor;

a loading mechanism for removing one of the elements from the conveyor and positioning it so that it is ready to be stored;

a mass storage apparatus containing a plurality of individually addressable storage locations for storage of said elements;

an assembly for moving the positioned elements and storing each element in a location in the mass storage apparatus; and

at least one dispensing assembly for removing a selected individual element from a location in the mass storage apparatus.

2. A system of claim 1, wherein the removing/positioning assembly and the moving/storing assembly operate independently of the dispensing assembly relative to the mass storage apparatus.

3. A system of claim 1, wherein the removing/positioning assembly and the moving/storing assembly are capable of operating concurrently with the dispensing assembly relative to the mass storage apparatus.

4. A system of claim 1, wherein said bin includes a hopper having a gated opening for receiving said individual elements therethrough, wherein the hopper includes at least two downwardly and inwardly angled walls for urging the received elements down to a bottom portion of the hopper.

5. A system of claim 4, including a stair-stepper mechanism for moving the individual elements out of the hopper to a start portion of a remainder of the system.

6. A system of claim 5, wherein the stair-stepper mechanism includes two alternating sets of separate plates, one set being fixed in position, the other set moving, wherein in operation the moving plates move the individual elements upwardly along a series of successive step-like portions of the fixed plates.

7. A system of claim 1, wherein the singulating system includes a series of four conveyors and a speed-up roller, including a first conveyor which is followed by a speed-up roller;

a second conveyor receiving elements from the speed-up roller;

a third, vertically oriented conveyor guiding elements from the second conveyor, the third conveyor extending at approximately a right angle to the second conveyor; and

a fourth conveyor which moves the elements guided by the third conveyor onto the system conveyor.

8. A system of claim 7, wherein the singulating apparatus includes at least one sensor for each conveyor portion thereof and wherein the operation of one of the singulating conveyors is initiated when a sensor for the next downstream conveyor or roller senses that there is no element present at that location.

9. A system of claim 1, including means for inspecting the individual elements when they are deposited onto the system conveyor, wherein the inspecting means includes a movable arm which when actuated moves an item deposited on the system conveyor into contact with a far wall bounding the system conveyor, wherein the arm includes a potentiometer element for determining whether the element is within predefined standards, so that a damaged element container can be identified.

10. A system of claim 9, including an actuating member for moving the far wall when the element is not within the predefined standards, permitting the element to be pushed off the system conveyor and into a first reject deposit member by said movable arm.

11. A system of claim 9, wherein the inspecting means includes a pin-like element which is selectively activated to knock down a tall element present on the system conveyor so that it presents a lower profile.

12. A system of claim 1, wherein the inspecting means includes means for visually identifying the element and for determining whether the element meets preselected criteria.

13. A system of claim 1, including a scan system located downstream of said inspecting means for reading a barcode on selected surfaces of the element.

14. A system of claim 1, wherein the selected surfaces include the top and sides of the element.

15. A system of claim 1, wherein the loading mechanism includes a loading platform upon which the element is moved from the main conveyor, and a lift platform located therebeneath having pin elements extending therefrom, wherein in operation the lift platform is activated such that the pins move through corresponding openings in the load platform to elevate the element so that it can be conveniently gripped by the removing and storing assembly.

16. A system of claim 15, wherein the loading mechanism includes a barcode scanner for scanning a bottom surface of the element when it is located on the loading platform.

17. A system of claim 16, including a bar member for moving the element back on the main conveyor if no barcode is detected on the element and wherein said element is moved by the main conveyor to a second reject area.

18. A system of claim 15, wherein the moving and storing assembly includes a pair of gripping arms which are movable in response to a signal command toward and away from each other to grab the elementelevated on the pins.

19. A system of claim 18, wherein the moving and storing assembly includes a tower element and an actuator for moving the gripping arms vertically for approximately the height of the mass storage apparatus, and wherein the moving and storing assembly further includes an actuator for rotating the gripping arms at least through a partial arc, and for moving the gripping arms axially in a straight line and in the same plane as the rotation thereof.

20. A system of claim 18, wherein the moving and storing assembly includes a load arm which moves axially to load the elements into a selected addressable location in the mass storage apparatus.

21. A system of claim 1, wherein the moving and storing assembly includes a sensor for recognizing whether or not said preselected location is vacant prior to actuation of the load arm.

22. A system of claim 1, wherein the dispensing assembly includes a dispensing tower member, an ejector assembly mounted for vertical movement on the dispensing tower member, the ejector mechanism including two sets of angled ejector arms, each set operating independently of the other set and covering a selected portion of the vertical dimension of the mass storage apparatus.

23. A system of claim 22, wherein the ejector arm moves toward and away from the mass storage apparatus, contacting the selected element in an open cell as it moves toward the main storage apparatus, ejecting the stored element into an open center portion of each mass storage apparatus, and wherein the system further includes a conveyor located beneath the mass storage apparatus for carrying the dispensed elements out of the system.

24. A system of claim 1, wherein the mass storage apparatus includes four upstanding cylindrical storage devices, each storage device containing a plurality of individual storage cells open at the front and rear ends thereof, located around the periphery thereof, wherein the cylindrical storage devices are open at the center thereof, wherein the removing and storing assembly is located approximately at the center of the four storage devices and serves all four devices, and wherein the system includes at least two dispensing assemblies, each dispensing assembly serving two adjacent cylindrical storage elements, and wherein each ejector assembly includes an angled ejector assembly for each cylindrical storage device.

25. A method for storing and dispensing individual elements, comprising:

storing a plurality of individual elements in a storage area;

removing the elements from the storage area;

depositing the elements onto a conveyor;

moving the elements along the conveyor to a loading mechanism;

removing the elements from the conveyor with the loading mechanism;

individually moving the positioned elements with a moving assembly to a mass storage apparatus containing a plurality of individually addressable storage locations;

storing each element in one of the locations in the mass storage apparatus; and

using a dispensing assembly, dispensing a selected individual element from a known location in the mass storage apparatus.