Workpiece assembly jig

1. A workpiece assembly jig including an aluminum jig main body for mounting thereon and assembling a long workpiece (W), and a steel jig base supporting the jig main body from below, the workpiece assembly jig comprising:

a plurality of first brackets provided around the perimeter of the jig main body;

a plurality of second brackets provided around the perimeter of the jig base so as to face a lower surface of the first brackets; and

connecting members having first and second male threaded portions extending in opposite directions from a middle flange, the connecting members connecting the first and second brackets;

wherein the first male threaded portion of the connecting member is screwed into a female threaded portion formed in one of the first and second brackets, and the second male threaded portion of the connecting member runs through a long hole longitudinally formed in the other of the first and second brackets which is secured between the flange of the connecting member and a nut screwed around the second male threaded portion.

2. The workpiece assembly jig according to claim 1 , wherein the long holes of the first brackets close to longitudinally opposite ends of the jig main body and the jig base are made longer than the long holes of the first brackets close to the longitudinal center.

3. The workpiece assembly jig according to claim 2 , wherein the length of the long hole is set based on a difference in coefficients of thermal expansion between aluminum and steel as well as a predetermined difference in temperature.

4. The workpiece assembly jig according to claim 1 , wherein said jig main body includes a first longitudinal frame and a second longitudinal frame with a plurality of lateral frames connected between said first and second longitudinal frames for securing the first and second longitudinal frames relative to each other.

5. The workpiece assembly jig according to claim 4 , and further including workpiece support members extending between said first and second longitudinal frames for mounting a workpiece relative to the jig main body.

6. The workpiece assembly jig according to claim 4 , wherein each of said first and second longitudinal frames are formed of a predetermined thickness having an outer perimeter and an inner perimeter displaced a predetermined distance relative to said outer perimeter and said plurality of first brackets being provided around the outer perimeter of said first and second longitudinal frames and said plurality of first brackets being provided around the inner perimeter of said first and second longitudinal frames and said connecting members being operatively connected between the first and second brackets for mounting the jig main body relative to the jig base.

7. The workpiece assembly jig according to claim 1 , wherein said jig base includes a jig main body support and a carriage mounted below said jig main body support.

8. The workpiece assembly jig according to claim 7 , and further including a plurality of casters mounted on said carriage for enabling selective movement of said workpiece assembly jig for positioning said workpiece assembly jig in a desired location.

9. The workpiece assembly jig according to claim 7 , and further including a plurality of outriggers mounted on said carriage for manually being adjusted for selectively supporting said workpiece assembly jig in a fixed location.

10. A workpiece assembly jig comprising:

a jig main body for supporting a workpiece (W);

a jig base operatively connected to said jig main body for supporting the jig main body from below;

a plurality of first brackets provided on the jig main body;

a plurality of second brackets provided on the jig base, said plurality of second brackets being individually aligned with a respective one of said plurality of first brackets; and

connecting members extending between respective aligned first and second brackets for connecting respective first and second brackets relative to each other;

wherein at least one of said first and second brackets includes an elongated aperture and the connecting members extend through respective first and second brackets enables selective adjustment of said jig main body relative to said jig base, and

wherein the elongated aperture in the first brackets close to longitudinally opposite ends of the jig main body and the jig base are made longer than the elongated aperture in the first brackets close to the longitudinal center.

11. The workpiece assembly jig according to claim 10 , wherein the length of the elongated aperture is set based on a difference in coefficients of thermal expansion between aluminum and steel as well as a predetermined difference in temperature.

12. The workpiece assembly jig according to claim 10 , wherein said jig main body includes a first longitudinal frame and a second longitudinal frame with a plurality of lateral frames connected between said first and second longitudinal frames for securing the first and second longitudinal frames relative to each other.

13. The workpiece assembly jig according to claim 12 , and further including workpiece support members extending between said first and second longitudinal frames for mounting a workpiece relative to the jig main body.

14. The workpiece assembly jig according to claim 12 , wherein each of said first and second longitudinal frames are formed of a predetermined thickness having an outer perimeter and an inner perimeter displaced a predetermined distance relative to said outer perimeter and said plurality of first brackets being provided around the outer perimeter of said first and second longitudinal frames and said plurality of first brackets being provided around the inner perimeter of said first and second longitudinal frames and said connecting members being operatively connected between the first and second brackets for mounting the jig main body relative to the jig base.

15. The workpiece assembly jig according to claim 10 , wherein said jig base includes a jig main body support and a carriage mounted below said jig main body support.

16. The workpiece assembly jig according to claim 15 , and further including a plurality of casters mounted on said carriage for enabling selective movement of said workpiece assembly jig for positioning said workpiece assembly jig in a desired location.

17. The workpiece assembly jig according to claim 15 , and further including a plurality of outriggers mounted on said carriage for manually being adjusted for selectively supporting said workpiece assembly jig in a fixed location.

18. The workpiece assembly jig according to claim 10 , wherein said jig main body is constructed of aluminum.

19. The workpiece assembly jig according to claim 10 , wherein said jig base is constructed of steel.

20. A workpiece assembly jig comprising:

a jig main body for supporting a workpiece (W);

a jig base operatively connected to said jig main body for supporting the jig main body from below;

a plurality of first brackets provided on the jig main body;

a plurality of second brackets provided on the jig base, said plurality of second brackets being individually aligned with a respective one of said plurality of first brackets; and

connecting members extending between respective aligned first and second brackets for connecting respective first and second brackets relative to each other;

wherein at least one of said first and second brackets includes an elongated aperture and the connecting members extend through respective first and second brackets enables selective adjustment of said jig main body relative to said jig base, and

wherein said jig main body includes a first longitudinal frame and a second longitudinal frame with a plurality of lateral frames connected between said first and second longitudinal frames for securing the first and second longitudinal frames relative to each other.