Cart Assembly for Use with a Work Piece and Methods of Use

• US 20190047458A1
• Filed: 08/08/2017
• Published: 02/14/2019
• Est. Priority Date: 08/08/2017
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Hall, JR., Curtis L., Sherman, Jeffrey Lee, Potthast, Jeremy
• Granted Patent: US 10,457,184 B2
• Time in Patent Office: Days
• CPC Class Codes: B60P 1/02 with parallel up-and-down movement of load supporting or containing element in combination with tipping B60P1/34; devices for lifting or lowering bulky or heavy goods for loading or unloading purposes, movable on wheels or the like, e.g. fork-lift trucks, B66F9/06 ; suspensions with electronic levelling control during loading or unloading B60G17/0157
• CPC Class Codes: B60P 1/04 with a tipping movement of load-transporting element dredgers or soil-shifting machines E02F3/00
• CPC Class Codes: B66F 7/0683 Scissor linkage plus tilting action

Abstract

A cart assemblies and methods of use for supporting and positioning a work piece during manufacturing. The cart assembly includes a table with a work surface configured to support the work piece. The table is connected to a base that is configured to move the table along a work floor. A lift mechanism adjusts the elevation of the table above the work floor, and a tilt mechanism adjusts an angle of the table relative to the work floor. The lift and tilt mechanisms may be used separately or simultaneously to adjust the position of the table as needed. The cart assembly also includes a trolley. The trolley is configured to receive and support the work piece away from the base. This provides for access to additional sections of the work piece during assembly.

Claims

1. A cart assembly configured to move a work piece about a work floor, the cart assembly comprising:

a base having a top side and a bottom side spaced from the top side, the bottom side configured to be supported on the work floor;

a table positioned on the top side of the base and comprising a first end, a second end spaced from the first end, a pivot disposed towards the first end, and a work surface that extends between the first and second ends and configured to support the work piece, the table pivotally mounted to move about the pivot between a horizontal position and a vertical position;

a tilt mechanism coupled to the table and configured to rotate the table about the pivot between the horizontal position and the vertical position;

a lift mechanism disposed between the base and the table, the lift mechanism configured to move the table relative to the base between a lowered position defining a first distance above the work floor and a raised position defining a second distance above the work floor that is greater than the first distance; and

a trolley comprising wheels configured to be supported on the work floor, the trolley connected to the base and horizontally movable relative to the base along the work floor between a retracted position and an extended position;

wherein in the retracted position, the trolley is vertically overlapped by the first end of the table and in the extended position the trolley is horizontally spaced away from the first end of the table.

2. The cart assembly of claim 1, further comprising at least one slide that connects the trolley to the base, the at least one slide configured to prevent the trolley from rotating relative to the base.

3. The cart assembly of claim 2, wherein the trolley is detachable from the at least one slide to remove the trolley from the base.

4. The cart assembly of claim 1, wherein the trolley further comprises a carousel operatively connected to the wheels and configured to rotate relative to the wheels.

5. The cart assembly of claim 4, wherein the trolley further comprises a pin that extends outward from the carousel, the pin sized to engage with the work piece.

6. The cart assembly of claim 1, wherein the table is parallel to the base when in the horizontal position and perpendicular to the base when in the vertical position.

7. The cart assembly of claim 1, further comprising:

a processing circuit communicatively connected to the lift mechanism and the tilt mechanism;

a drive train to drive the base along the work floor; and

a wireless transceiver operatively connected to the processing circuit and configured to wirelessly communicate with a remote source to remotely control the drive train, the tilt mechanism, and the lift mechanism.

8. The cart assembly of claim 7, further comprising a sensing circuit operatively connected to the processing circuit, the sensing circuit configured to detect an object within a physical envelope around the cart assembly and to signal the processing circuit to prevent movement of the cart assembly when the object is detected.

9. A cart assembly configured to move a work piece about a work floor, the cart assembly comprising:

a base with a top side and a bottom side spaced from the top side, the bottom side configured to be supported on the work floor;

a table positioned on the top side of the base, the table having a pivot and presenting a work surface configured to support the work piece;

a lift mechanism disposed between the base and the table, the lift mechanism configured to move the table relative to the base between a lowered position and a raised position;

a tilt mechanism connected to the table and configured to rotate the table about the pivot between a horizontal position and a vertical position; and

a trolley configured to be supported on the work floor, the trolley connected to the base and horizontally movable along the work floor relative to the base between a retracted position and an extended position;

the cart assembly being movable between first, second, third, fourth, and fifth positions;

in the first position the table is in the lowered and horizontal positions and the trolley is in the retracted position;

in the second position the table is in the raised and horizontal positions and the trolley is in the retracted position;

in the third position the table is in the raised and vertical positions and the trolley is in the retracted position;

in the fourth position the table is in the lowered and vertical positions and the trolley is in the retracted position;

in the fifth position the table is in the vertical position and the trolley is in the extended position.

10. The cart assembly of claim 9, wherein the lift mechanism comprises a scissor lift comprising first and second arms with each of the arms having a first end connected to the base and a second end connected to the table.

11. The cart assembly of claim 9, further comprising an adapter plate configured to be attached to the work piece to secure the work piece to the trolley.

12. The cart assembly of claim 9, further comprising at least one slide that connects the trolley to the base, the at least one slide configured to prevent the trolley from rotating relative to the base and to locate the trolley between the extended and retracted positions.

13. The cart assembly of claim 12, wherein the trolley comprises wheels to move along the work floor, the trolley also comprises a carousel mounted to the wheels and that rotates relative to the wheels.

14. The cart assembly of claim 9, further comprising:

a processing circuit communicatively connected to the lift mechanism and the tilt mechanism;

a drive train to drive the base along the work floor; and

a wireless transceiver operatively connected to the processing circuit and configured to wirelessly communicate with a remote source to remotely control the lift mechanism and the tilt mechanism to move the cart assembly between the first, second, third, fourth, and fifth positions.

15. A method of using a cart assembly to move a work piece about a work floor, the method comprising:

supporting the work piece with a table, the table being attached to a base that is positioned on the work floor;

positioning the table and the work piece in a lowered position a first distance from the work floor and with the table and the work piece in a horizontal position;

raising the table away from the work floor to a raised position while the work piece is supported on the table and the base is on the work floor and the work piece is in the horizontal position;

rotating the table and positioning the work piece transverse to the work floor while the work piece is supported on the table and the base is on the work floor and the table is in the raised position;

positioning the work piece vertically over a trolley that is on the work floor and that is attached to base;

lowering the table towards the work floor and positioning the work piece onto the trolley while the trolley is on the floor and is attached to the base while the work piece is supported on the table and the base is on the work floor;

supporting the work piece on the trolley and removing the work piece from the table; and

moving the trolley along the work floor away from the base while the trolley is supporting the work piece.

16. The method of claim 15, further comprising supporting the work piece on a shelf of an elbow member that is attached to and that extends outward from the table while the table is in the vertical position.

17. The method of claim 15, further comprising simultaneously moving the base along the work floor while rotating and raising the table.

18. The method of claim 15, further comprising remotely rotating and raising the table.

19. The method of claim 15, further comprising rotating the table 90°

between the horizontal position and a vertical position.

20. The method of claim 15, further comprising detaching the trolley from the base while the trolley is supporting the work piece.