Method for the assembly of automotive vehicles

• US 5,319,840 A
• Filed: 12/30/1991
• Issued: 06/14/1994
• Est. Priority Date: 12/28/1990
• Status: Expired due to Term

• Current Assignee: Mazda Motor Corporation
• Original Assignee: Mazda Motor Corporation
• Inventors: Nishimoto, Shuji, Inoue, Hiroaki, Yamamoto, Seikichi, Kihara, Nobuo
• Primary Examiner(s): Eley, Timothy V.
• Application Number:
  US07/813,742
• Time in Patent Office: 897 Days
• Field of Search: 29/429, 29/430, 29/431, 29/458, 29/464, 29/466, 29/467, 29/468, 29/469, 29/783, 29/786, 29/791, 29/793
• US Class Current: 29/430
• CPC Class Codes: B62D 65/02 Joining sub-units or components to, or positioning sub-units or components with respect to, body shell or other sub-units or components
• CPC Class Codes: Y10T 29/49829 Advancing work to successive stations [i.e., assembly line]
• CPC Class Codes: Y10T 29/49885 with coating before or during assembling
• CPC Class Codes: Y10T 29/49895 Associating parts by use of aligning means [e.g., use of a drift pin or a "fixture"]
• CPC Class Codes: Y10T 29/49904 Assembling a subassembly, then assembling with a second subassembly

Abstract

The method involved in the present invention is directed to the coating step where an assembled unit of the upper vehicle body and the under vehicle body is coated and the upper vehicle body section is separated from the under vehicle body after coating. In the vehicle body assembly step, the vehicle body is loaded on a jig unit disposed so as to be movable through stations located along the vehicle body assembly line. Upon loading the upper vehicle body on the jig unit, the vehicle body is aligned with the jig unit on the basis of an inner member of a member for structuring the vehicle body with the aid of an aligning unit mounted to the jig unit. After coating the assembled vehicle body unit, the unit is divided into the upper vehicle body and the under vehicle body, which are then processed in separate mounting steps. After mounting various parts to each of the upper vehicle body and the under vehicle body in their own mounting lines, the upper vehicle body is combined with the under vehicle body. The lower part unit is then mounted to the vehicle body assembly or mounted to the under vehicle body prior to the assembly of the under vehicle body with the upper vehicle body.

Claims

1. A method for the assembly of automotive vehicles in a vehicle body assembly line, comprising:

a white vehicle body assembly step for assembling an upper vehicle body section and for assembling an under vehicle body section, said white vehicle body assembly step including an under body section assembling step for assembling the under vehicle body section comprising a floor panel member and an upper vehicle body section assembling step for assembling the upper vehicle body section;

a coating step for coating the upper vehicle body section and the under vehicle body section subsequent to said white vehicle body assembly step while maintaining them separated from each other; and

a part mounting step for separating mounting at least one part to each of the upper vehicle body section and the under vehicle body section after said coating step; and

a part mounting step for separately mounting at least one part to each of the upper vehicle body section and the under vehicle body section after said coating step; and

an upper and lower vehicle body assembly step subsequent to said part mounting step for assembling the upper vehicle body section with the under vehicle body section.

2. A method as claimed in claim 1, wherein said white vehicle body assembly step includes:

carrying out the upper vehicle body section assembly step of the white vehicle body assembly step in an upper vehicle body section assembly line with a jig unit disposed therein and providing a plurality of aligning means and a plurality of clamping means; and

said method further comprising the steps of;

aligning a member for structuring the upper vehicle body section with the jig unit based on a position of an inner member of the member for structuring the upper vehicle body section and assembling the member with another member for forming the upper vehicle body section into the upper vehicle body section.

3. A method as claimed in claim 2, said method further comprising the step of:

aligning a body side panel with the jig unit based on a position of a side inner panel.

4. A method as claimed in claim 2, further comprising the step of aligning a roof outer panel with the jig unit based on a position of a roof bow mounted to the roof outer panel.

5. A method as claimed in claim 1, wherein said white vehicle body assembly step includes:

carrying out the upper vehicle body section assembly step of the white vehicle body assembly step in an upper vehicle body section assembly line with a jig unit disposed therein and providing a plurality of aligning means and a plurality of clamping means; and

said method further comprising the steps of;

assembling a cowl panel with a dash panel to thereby form a cowl-dash panel unit prior to supplying said cowl panel to the jig unit and aligning the cowl-dash panel unit with the jig unit.

6. A method as claimed in claim 1, wherein said white vehicle body assembly step includes:

carrying out the upper vehicle body section assembly step of the white vehicle body assembly step in an upper vehicle body section assembly line with a jig unit disposed therein an providing a plurality of aligning means and a plurality of clamping means; and

said method further comprising the steps of;

assembling rear package tray members to form a rear package tray assembly prior to supplying said rear package tray members to the jig unit and aligning the rear package tray assembly with the jig unit.

7. A method as claimed in claim 1, further comprising the steps of:

providing a conveying means for conveying the upper vehicle body and the lower vehicle body to said coating step, the conveying means comprises a hanger;

loading the upper vehicle body section on an upper position of the hanger; and

loading the under vehicle body section on a lower position of the hanger.

8. A method as claimed in claim 1, wherein:

said coating step includes coating an anti-chipping paint after coating an overcoating paint; and

said method further comprising the step of;

conveying the upper vehicle body section and the under vehicle body section with substantially identical conveying means throughout the coating step including said step of coating anti-chipping paint.

9. A method as claimed in claim 1, wherein:

said coating step comprises coating an under coating paint, coating an anti-chipping paint and coating an overcoating paint;

said method further comprising the steps of;

conveying the upper vehicle body section and the under vehicle body section with substantially identical conveying means throughout the coating step up to said step of coating anti-chipping paint; and

separating the upper vehicle body section and the under vehicle body section and processing the upper vehicle body section and the under vehicle body section separately after the step for coating the anti-chipping paint.

10. A method as claimed in claim 1,

wherein said coating step includes a step of coating the under coating paint to the upper vehicle body section and the under vehicle body section;

said section further comprising the steps of;

conveying the upper vehicle body section and the under vehicle body section with substantially identical conveying means before the step of coating the under coating paint; and

separating the upper vehicle body section and the under vehicle body section and processing the upper vehicle body section and the under vehicle body section separately after the step for coating the under coating paint.

11. A method as claimed in claim 1, further comprising the step of:

mounting a lid member including at least one of a bonnet, a door and a trunk lid to the upper vehicle body section prior to conveyance to said coating step.

12. A method as claimed in claim 11, further comprising the steps of:

removing the lid member from the upper vehicle body section after the upper vehicle body section has been coated in said coating step; and

conveying the lid member removed from the upper vehicle body section to a vehicle body section assembly line, separately from the under vehicle body section, and mounting the lid member to the upper vehicle body section in said upper and lower vehicle body assembly step.

13. A method as claimed in claim 12, wherein:

said step of removing the lid member from the upper vehicle body section is done in an initial stage of said upper and lower vehicle body assembly step.

14. A method as claimed in claim 12, wherein:

said step of mounting the lid member in said upper and lower vehicle body assembly step includes mounting the lid member after the upper vehicle body section has been assembled with the under vehicle body section.

15. A method as claimed in claim 12, wherein said part mounting step includes:

using a mounting line for mounting a part;

providing a guide rail disposed in or along the mounting line;

loading a carrier disposed on and along the guide rail with the upper vehicle body section;

loading the carrier with a working robot for aligning the upper vehicle body section with the carrier;

mounting the part to the upper vehicle body section loaded thereon;

providing aligning means for aligning the upper vehicle body section with the carrier; and

assembling the part disposed on the carrier to the upper vehicle body section while the upper vehicle body section is conveyed.

16. A method as claimed in claim 15, further comprising the step of:

disposing the working robot within a cabin section of the upper vehicle body section when the upper vehicle body section is loaded on the carrier.

17. A method as claimed in claim 16, wherein:

said step of mounting the part includes mounting a small part including at least one of a grommet, a wire-harness, a fastener and a clip to the inside of the cabin section of the upper vehicle body section.

18. A method as claimed in claim 15, further comprising the step of:

disposing the working robot in front of an engine room of the upper vehicle body section when the upper vehicle body section is loaded.

19. A method as claimed in claim 18, wherein:

said step of mounting the part includes mounting a small part including at least one of a grommet, a wire-harness, a fastener and a clip to the inside of the cabin section of the upper vehicle body section.

20. A method as claimed in claim 15, further comprising the step of:

mounting a lower part unit to the under vehicle body section after the under vehicle body section has been assembled with the upper vehicle body section.

21. A method as claimed in claim 20, wherein:

said step of mounting the lower part unit includes mounting a driving system part containing at least one of an internal combustion engine, an exhaust system part, and a suspension unit.

22. A method as claimed in claim 20, further comprising the step of:

mounting the lid member to the assembly of the upper vehicle body section with the under vehicle body section after said step of mounting the lower part unit.

23. A method as claimed in claim 15, further comprising the step of:

mounting a lower part unit to the under vehicle body section prior to the assembly of the under vehicle body section with the upper vehicle body section.

24. A method for the assembly of automotive vehicles in a vehicle body assembly line, comprising:

a white vehicle body assembly step for assembling an upper vehicle body section and for assembling an under vehicle body section, said white vehicle body assembly step including an under body section assembling step for assembling the under vehicle body section comprising a floor panel member and an upper vehicle body section assembling step for assembling the upper vehicle body section;

a coating step for simultaneously coating the upper vehicle body section and the under vehicle body section subsequent to said white vehicle body assembly step while maintaining them separated from each other; and

a part mounting step for separately mounting at least one part to each of the upper vehicle body section and the under vehicle body section after said coating step; and

an upper and lower vehicle body assembly step subsequent to said part mounting step for assembling the upper vehicle body section with the under vehicle body section.