Control system for automotive vehicle component assembly lines

• US 4,332,012 A
• Filed: 11/20/1979
• Issued: 05/25/1982
• Est. Priority Date: 11/27/1978
• Status: Expired due to Term

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Abe, Kazuyoshi, Obata, Kazunori, Shimizu, Hisashi, Imaizumi, Hiroshi, Sekine, Yoshitada, Katagi, Shoji
• Primary Examiner(s): Wise, Edward J.
• Application Number:
  US06/096,230
• Time in Patent Office: 917 Days
• Field of Search: 364/468, 364/424, 364/425, 209/552, 209/546, 209/576, 209/579
• US Class Current: 700/116
• 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: B62D 65/18 Transportation, conveyor or haulage systems specially adapted for motor vehicle or trailer assembly lines conveyors and haulage in general B65G
• CPC Class Codes: G05B 19/128 the workpiece itself serves as a record carrier, e.g. by its form, by marks or codes on it
• CPC Class Codes: G05B 19/4182 manipulators and conveyor only
• CPC Class Codes: G05B 2219/23363 Barcode
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

Control of an automotive vehicle component assembling system having one or more series of assembly lines used in common for assembling various models, standards and/or specifications of vehicle component is provided by converting information and instructions relating to various models, standards and/or specifications of vehicle component into a sign. The sign is fitted onto one of the part of the component. Information and instructions from the sign are detected automatically to control picking up of parts and assembling operations in each assembly line.

Claims

1. In an automotive vehicle component assembling system having at least one series of assembling lines used in common for assembling various model, standards and specifications of the vehicle components,

a system for controlling one of said assembling lines comprising:

a first means for obtaining information and instructions in relation to the vehicle component to be assembled in order and at a given interval and generating an electric signal representative of the obtained information and instructions of the vehicle component to be assembled;

a second means for receiving said electric signal fed from said first means and converting the electric signal into photoelectrically sensible sign which is printed on a label;

a third means for sticking said label onto a part of said vehicle component and for reading said sign on the label to convert the same to the electric signal fed back to the first means for confirmation, and

a fourth means for reading said sign on the label and obtaining necessary information and instructions and for converting the obtained information and intructions into a control signal for identifying a part of the vehicle component to be picked up and for controlling assembling operations performed in said one assembling line.

4. A control system as recited in claim 1, 2 or 3, wherein said sign also includes an information of product number to be applied to the vehicle component.

5. A control system as recited in claim 1, 2 or 3, wherein said sign can be read by means of a photoelectrical process.

6. A control system as recited in claim 5, wherein said signs is contained on a label which can be stuck on the parts of the vehicle component.

7. A control system as recited in claim 5, wherein each assembly line obtains information and/or instructions from said signs before entering the vehicle component to be assembled thereinto.

8. A control system as recited in claim 7, in each assembly line, said photoelectrically sensitive signs being converted into electric control signals for electrically controlling picking up parts, supplying the same into the line and performing assembling operation.

9. A control system as recited in claims 8, wherein said first means comprises a reader for reading the information and instruction for controlling said assembly lines and a code printer 670 receiving information and/or instruction and converting the same into a sign to be printed.

10. A control system as recited in claim 9, wherein said printer prints a specific bar code comprising a plurality of thick lines and thin lines in combination, containing necessary information and/or instructions on a label to be stuck on one of the parts of the vehicle component.

11. A control system as recited in claims 1, 2 or 3, wherein said sign 666 is contained on a label 666 which can be stuck on the parts of the vehicle component.

12. A control system as recited in claim 1, 2 or 3, wherein each assembly line obtains information and/or instructions from said signs before entering the vehicle component to be assembled thereinto.

13. A control system as recited in claim 12, in each assembly line, said signs being converted into control signals for automatically controlling picking up parts, supplying the same onto the line and performing assembling operation.

14. A control system as recited in claim 1, 2 or 3, wherein are provided various instruction papers 530 containing information with respect to required operation and signs 664 containing information for designating one of the instruction papers therefrom.

15. A control system as recited in claim 1, 2 or 3, wherein said third means comprises a reader provided upstream of each assembly line and reading said code, and a controller associated with said reader to generate control signals for controlling selection of necessary parts and controlling assembling operation.

16. A control system as recited in any one of claim 15, wherein said label is provided with a magnetic member on the back thereof so as to magnetically attract to the parts of vehicle component.

17. A control system as recited in claim 16, wherein said magnetic member is magnetic rubber.

18. A control system as recited in claim 1, 2 or 3, where, between said first line and said second line, there is provided a point constabling means on which each vehicle body to be assembled is selectively forwarded to a series of assembly lines performing designated assembling operation.

19. A control system as recited in claim 18, wherein said point constabling means includes a reader for reading said code contained on the vehicle body so as to select series of assembly lines, which the vehicle body is forwarded.

20. A control system as recited in claim 1, 2 or 3, between said second line and said third line, there is provided a product number impressing means comprising a plurality of numbering rollers each having a plurality of models defining numbers or letters and an actuating means for impressing the numbering rollers on to the vehicle body.

21. A control system as recited in claim 20, wherein said product number impressing means includes a reader for reading a code contained on the vehicle body, and is controlled by information or instruction with respect to the product number contained on the code.

22. A control system as recided in claim 20, wherein said product number impressing means comprises:

a numbering element having said numbering rollers and the actuating means for impressing the numbering rollers onto the vehicle body;

a hoisting means connected with the numbering element for moving the numbering element up and down; and

a driving means to rotate the numbering element with respect to the vehicle body.

23. A control system as recited in claim 1, 2 or 3, wherein said series of assembly lines includes a line for performing special treatment which is required on the vehicle body of special models, standards and/or specifications.

2. In an automotive vehicle component assembling system having at least one series of assembling lines in common for assembling various models, standards and structures of the vehicle components,

a system for controlling the assembling system comprising:

a first means for obtaining information and instructions with respect to the vehicle component to be assembled from a medium fed thereto in order and at a given interval, which medium contains the information and instructions of the vehicle component to be assembled and is in a form of punched card, said first means converting the obtained information and instructions into an electric signal;

a second means for receiving said electric signal from said first means and for converting the electric signal into photoelectrically sensible sign which is printed onto a label;

a third means for sticking said label onto a part of said vehicle component and for reading said sign on the label to convert the same to the electric signal to be fed back to the first means;

said third means including means for comparing the read sign with the electric signal generated in the first means to check whether both of signals are matched together; and

a fourth means for reading said sign on the label and for converting the obtained information and instructions from said sign into a control signal for identifying a specific part of the vehicle component and for controlling assembling operations of each individual assembling line.

3. In an automotive vehicle component assembling system having at least one series of assembling lines in common for assembling various models, standards and specifications of the vehicle component,

a system for controlling the assembling system comprising:

a first means for reading information and instructions relating to the vehicle compartment to be assembled from a punched tape sequentially fed thereto and including the information and instruction of the vehicle component to be assembled in order and at a given interval, said first means generating an electric signal representative of the read information and instructions of the vehicle component;

a second means responsive to said electric signal derived from said first means for converting said electric signal to a bar-code sign which is printed onto a label adapted to be magnetically fitted onto a part of the vehicle component;

said second means generating an electric signal representative of the information and instructions read from the bar-code sign, means for feeding the electric signal generated by the second means back to the first means;

said first means including means for comparing electric signals generated in the first and second means for confirmation;

a third means for magnetically picking up and sticking the label onto the part of the vehicle component and for reading the bar-code sign on the label to generate an electric signal;

means for feeding back the electric signal generated by the third means to said first means;

said first means including means for comparing the electric signals generated in the first and third means; and

a fourth means provided in each individual assembling line to read out the information and instructions of the vehicle component to be assembled for identifying the specific part of the vehicle component and for controlling the assembling operation performed in each individual assembling line.

24. In an automotive vehicle component assembling system having at least one series of assembling lines in common for assembling various models, standards, specifications of the vehicle component,

a method for controlling the assembling line comprising:

obtaining information and instructions from a medium containing all the information and instructions therein;

feeding the medium in sequence and deriving the information and instructions in order of the vehicle component to be assembled and at a given interval;

generating an electric signal representative of the derived information and instructions with respect to the vehicle component to be assembled;

converting the electric signal into a bar-code sign which is photoelectrically sensible;

printing the bar-code sign onto a magnetically stickable label;

sticking the label onto a part of the vehicle component which is identified by the information and instructions in the bar-code sign;

reading out the information and instructions from the bar-code sign in each individual assembling line and converting the read out information and instructions into a control signal for identifying parts to be assembled to the designated vehicle component and controlling the assembling operation performed in the assembling line.

25. A method as set forth in claim 24, further comprising (a) generating an electric signal representing the information and instructions read out from the bar-code sign, and (b) comparing the signal representing information and instructions from the bar-code sign with the signal representing the information and instructions obtained from said medium for confirmation, said steps (a) and (b) being performed between the steps sticking the label onto the part of the vehicle component and reading out the information and instructions in each individual assembling line.

26. A method as set forth in claim 24 or 25, wherein said method further comprises selecting an assembling line according to the information and instructions requiring the special treatment.

27. An automotive vehicle body assembling system comprising:

a first means for obtaining information and instructions identifying a model, standard and specification of the vehicle body to be assembled and for identifying the parts forming the identified vehicle body, which information and instructions relating to the vehicle body to be assembled are contained in a dynamic tape medium sequentially fed to said first means and containing the information and instructions in order of assembling of the vehicle body and at a given interval, said first means including means for converting the obtained information and instructions to a photoelectrically sensible bar-code sign, means for printing the bar-code sign onto a label, said first means generating an electric signal representative of the information and instructions of the vehicle body, said electric signal identifying a floor assembly for the identified vehicle body, said electric signal containing bar-code information to be stuck to the printed label;

a second means for feeding the floor assembly containing the label to a series of assembly lines including a body assembly line and a body finishing line;

a third means provided in the body assembly line, which third means reads out the information and instructions contained in the bar-code and generates a control signal for identifying parts to be assembled to the floor assembly and for controlling the assembling operation performed in the body assembly line; and

a fourth means provided in the body finishing line for reading out the information and instructions from said bar-code and generating a control signal for identifying the parts to be assembled to the body assembly fed thereto and for controlling the assembling operation performed in the body finishing line.

28. A system as set forth in claim 27, wherein said system comprises a plurality of series of assembling lines each of which comprises a floor assembly line, a body assembly line and a body finishing line, said second means including means for selecting one of the series of the assembling lines based on the information and intructions obtained from the bar-code.

29. A system as set forth in claim 28, wherein said system has only one floor assembly line which acts as a common line for the plurality of series of assembling lines, said second means including a junction for selectively feeding a partially assembled automobile as derived from the floor assembly line to the designated series of the assembling lines.

30. A system as set forth in claim 29, wherein said junction comprises a movable element movable responsive to a control signal representative of the identification of the designated series of assembling lines, means for reading the identification from the bar-code sign on the label, said movable element connecting the floor assembly line to the trailing assembling lines identified by the bar-code.

31. A system as set forth in claim 27, wherein a product number indication means is provided downstream of the body assembly line, said product number indication means reading out the information relating to the product number from said bar-code on the label and generating a control signal representative of the designated product number, and a numbering device impressing the designated product number in response to the control signal representative of the designated product number.

32. A system as set forth in claim 31, wherein said numbering device generates an electric signal representative of the product number to be impressed and said product number indication means includes means for comparing the fed back signal from said numbering device with the designated product number read from the bar-code sign on the label.

33. A system as set forth in claim 31 or 32, wherein said numbering device comprises a numbering element having a plurality of numbering rolls co-axially aligned to one another and an actuator for impressing the numbering rolls onto the vehicle body, a hoisting means connected with the numbering element for moving the numbering element up and down, and a driving means for rotating the numbering rolls according to the identification of the product number represented by the control signal.

34. A system as set forth in claim 27, wherein said system further includes means for confirming the assembled vehicle body with the specific model, standard and specification given by the bar-code sign on the label downstream of the body finishing line.

35. A method of controlling the assemblage of automobiles in an assembly system including in series a floor assembly line, a body assembly line, a special treatment line and a body finishing line, different parts for different automobile models being stored at the floor and body lines, comprising preparing a sign for each automobile, said sign including machine readable indicia associated with different parts from the floor and body assembly lines to be included in a particular automobile, as well as from the body finishing line and operations to be performed at the special treatment line;

at the floor assembly line securing the sign to a common part of each automobile assembled in the assembly system, reading the machine readable indicia at the floor assembly line from the sign on the common part of a particular automobile to derive a first control signal, responding to the first control signal to select which parts are to be assembled on the particular automobile at the floor sub-assembly line, assemblying the parts selected at the floor assembly line onto the part containing the sign, conveying the automobile as partly assembled at the floor assembly line to the body assembly line;

reading the machine readable indicia at the body assembly line from the sign on the common part of the particular automobile to derive a second control signal, responding to the second control signal to select which parts are to be assembled on the particular automobile at the body assembly line, assemblying the parts selected at the body assembly line onto the partly assembled automobile conveyed to the body assembly line, conveying the automobile as partly assembled at the body assembly line to the special treatment line;

reading the machine readable indicia at the special treatment line from the sign on the common part of the particular automobile to derive a third control signal, responding to the third control signal to select which treatments are to be performed on the particular automobile at the special treatment line, performing the selected treatment at the special treatment line, conveying the automobile as partly assembled at the special treatment line to the body finishing line;

reading the machine readable indicia at the body finishing line from the sign on the common part of the particular automobile to derive a fourth control sign, responding to the fourth control signal to select which parts are to be assembled on the particular automobile at the body finishing line, and assemblying the parts selected at the body finishing line onto the partly assembled automobile conveyed to the body finishing line.

36. The method of claim 35 wherein the assembly system includes N body assembly lines, where N is an integer greater than one, a separate special treatment line for each of the body assembly lines, a separate body assembly finishing line for each of the special treatment lines, each of the body assembly lines, the special treatment line and body assembly finishing line being controlled in response to the signals read from the sign on the particular automobile, and a device for routing of the partially assembled automobiles conveyed from the floor assembly to selected ones of the N body assembly lines;

the method further comprising reading the machine readable indicia from the sign on the common part of a certain automobile to derive a fifth control signal, and controlling the routine device in response to the fifth control signal to convey the certain automobile to one of the N body assembly lines.

37. The method of claim 35 further comprising reading the machine readable indicia from the common part to derive an indicia indicating signal while the particular partially assembled automobile is at the floor assembly line and prior to other parts assembled on the common part at the floor assembly line, writing the indicia onto the sign in response to a sixth signal derived from a storage medium, and enabling parts to be assembled on the common part only in response to the fifth and sixth signals indicating that the indicia written on the sign and in the storage medium being for the same operations at the floor and body assembly lines, at the special treatment line and at the equipment assembly line.

38. The method of claim 35 further comprising conveying the automobile as assembled at the body finishing line to a further section of the assembly line, reading the indicia from the sign on the common part of the particular automobile at the further section to derive a further signal, and controlling an operation on the particular automobile at the further section.

39. The method of claim 38 wherein the further section is a section for printing a human readable label and for affixing the label to a part of the automobile.

40. The method of claim 38 wherein the further section is an interior assembly section.

41. A method of assemblying automobiles on an assembly system including plural assembly lines through which a particular automobile passes in series, there being provided at a first of the assembly lines a common part of every automobile being assembled, different other parts being applied to the common part at the first assembly line, different further parts and steps being applied to and performed on a partially completed automobile at the other assembly lines, the method comprising preparing a sign for each automobile to be assembled, said sign including machine readable indicia associated with parts to be assembled and operations to be performed at the first and other assembly lines, at the first assembly line securing the sign to the common part of each automobile assembled in the system;

at each assembly line where parts are assembled;

reading the machine readable indicia from the sign on the common part of a particular automobile to derive a control signal, responding to the control signal to select which parts are to be assembled on the particular automobile at the assembly line, assemblying the parts selected at the assembly line onto the partially assembled automobile at the assembly line;

at each assembly line where an operation is performed;

reading the machine readable indicia from the sign on the common part of the particular automobile to derive an additional control signal, and performing selected operations on the particular automobile in response to the additional control signal.