JP2003267278A - Body assembly line - Google Patents

Abstract

(57) [Problem] To provide a vehicle assembly line in which the total length of an assembly line can be made shorter than before and the number of times of changing the method of supporting the vehicle body can be made smaller than before. The task is to provide The present invention relates to a vehicle assembly line in which parts are sequentially assembled to a vehicle body that has been subjected to a painting process, and the completed vehicle is subjected to inspection. And a parallel assembly line for performing assembly of parts from the vehicle body to the vehicle body in parallel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle assembly line used for manufacturing vehicles.

[0002]

2. Description of the Related Art A vehicle assembling process is the final stage of vehicle manufacturing. Various parts are assembled to a painted vehicle body to complete the vehicle and a final inspection is performed. The vehicle assembly process is performed by an operator manually assembling various parts to the vehicle body while the vehicle body is conveyed along an assembly line by an overhead conveyor, a slat conveyor, or the like. The assembly line is composed of a main line for transporting the vehicle body and a sub-line for assembling component units such as a rear suspension and a front suspension.

Here, a typical conventional vehicle assembly line will be described with reference to FIGS. 8 and 9. Figure 8
Is a configuration diagram of a conventional assembly line, and a lower diagram is a layout diagram of this assembly line. In addition, FIG. 9 is a schematic diagram illustrating how the vehicle body is conveyed on this assembly line.

When the painting process is completed, the vehicle body is positioned on the overhead conveyor OH100 and is carried into the assembly line in a suspended state. First, the work of assembling the underfloor concentrated piping from the bottom of the vehicle body is performed in the first transmission line zone Z100 while being suspended and supported by the overhead conveyor OH100. Then, the vehicle body is transferred to the transfer device 200.
Is positioned and supported on the transport carriage of the free-flow conveyor FF100 installed on the work floor surface from the overhead conveyor OH100, and is mounted and supported on the second transmission passage zone Z101 from the upper part of the vehicle body to the cabin wire harness and the antilock. Brake system (ABS),
A radiator etc. is assembled.

Subsequently, the vehicle body is carried to the interior zone Z102 while being placed and supported by the carrier truck. In the interior zone Z102, roof lining,
The floor mat and the instrument panel unit assembled by the instrument panel unit sub-line 305 arranged in parallel with the assembly line are assembled. A transfer device 201 is installed at the end of the interior zone of the free flow conveyor FF100, and the vehicle body is suspended and supported by the overhead conveyor OH101 by the transfer device 201. When the vehicle body is transferred to the overhead conveyor OH101, the positioning is performed again.

The vehicle body suspended and supported by the overhead conveyor OH101 is conveyed to the lower zone Z103,
From the bottom of the vehicle, the fuel tank, rear suspension unit, engine, front suspension assembly, silencer, brake hose pipe, tires, etc. are assembled. In the lower zone Z103, a rear suspension unit sub-line 301 for assembling a rear suspension unit, a front suspension unit sub-line 302 for assembling a front suspension unit, and an engine / front suspension unit connecting sub-line 304 for carrying the engine to be described later. An engine transfer line 303 and an engine / front suspension unit coupling sub-line 304 for connecting the front suspension unit and the engine are provided.

A transfer device 202 is installed at the end of the lower zone Z103, and the vehicle body is positioned by the transfer device from the overhead conveyor OH101 onto the carriage of the free flow conveyor FF101 installed on the work floor surface. It is placed and supported after it has been mounted. At this stage, the tires have already been assembled to the car body, so
The carrier of the carrier holds these tires.

Subsequently, the vehicle body is transported to the exterior zone Z104 while being placed and supported by the transport vehicle, and is assembled from the upper portion of the vehicle body by the damper, the seat, the handle, the bumper, the window glass, and the door unit subline 306. A door unit etc. is assembled.

Next, the vehicle body is conveyed to the combined guarantee zone Z105, and brake oil, washer fluid, engine oil, gasoline and the like are injected from the upper portion of the vehicle body, the battery and the like are assembled, and the vehicle is completed. The process up to this point is the assembly line, and the subsequent steps are the completed vehicle inspection line. At the completed car inspection line, it is inspected whether the completed car satisfies the performance to be satisfied.

Although the term "-zone" is used here, this means that the assembly line is defined on the basis of the assembly position of the parts, the assembly procedure and the function of the parts in the assembly line. It is the name given to the section when it is divided into sections.

[0011]

However, in the conventional assembly line as seen in FIGS. 8 and 9, each of the zones Z100 to Z1.
05 are arranged in series, and in each zone,
Since the sub-lines 301 to 306 are arranged, there is a problem that the assembly line becomes long and wide, the occupied area is very large, and the space utilization efficiency is poor.

Further, since the assembly line is long, the conveyor is inevitably long, and the installation cost of the assembly line is high. Further, in the conventional assembly line, transfer devices for changing the support method of the vehicle body are installed at three places, and whenever the support method of the vehicle body (suspension support or placement support) is changed, Therefore, there was a problem that the work efficiency was poor.

The present invention has been made in view of the above problems, and the total length of the assembly line can be made shorter than before, and the number of times of changing the supporting method of the vehicle body can be made smaller than before. An object of the present invention is to provide an assembling line of a vehicle capable of performing the above.

[0014]

The present invention has the following constitution in order to solve the above-mentioned problems. In the invention according to claim 1, in a vehicle assembly line in which parts are sequentially assembled to a vehicle body that has been subjected to a painting process, and a completed vehicle is subjected to inspection, assembly of parts from the vehicle body bottom portion to the vehicle body is performed. A vehicle assembly line having a parallel assembly line including a lower floor for performing and an upper floor for assembling components from the upper portion of the vehicle body to the vehicle body.

According to the first aspect of the invention, in the vehicle assembly line, the parallel assembly line is provided, which includes the lower floor for assembling the components from the bottom of the vehicle body and the upper floor for assembling the components from the upper portion of the vehicle body. This is, so to speak, equivalent to constructing a two-story work floor, and it becomes possible to carry out the work of assembling parts to the vehicle body, which was conventionally done in series, in parallel. The length and the time required for assembling the vehicle can be shortened. Also, since it is possible to assemble parts from the top and bottom of the car body at the same time, the number of changes of the car body support method (suspended support by overhead conveyor or placement support by free flow conveyor) can be changed. The number can be reduced as compared with the conventional one, and the number of positionings due to the change in the supporting method can be reduced.

According to a second aspect of the present invention, the parallel assembly line includes a gantry provided on the lower floor and a transport mechanism for transporting a vehicle body on the gantry, and the gantry includes:
2. The vehicle assembly line according to claim 1, further comprising a through space for assembling components from the lower floor.

According to the second aspect of the invention, in the parallel assembly line, the upper floor is provided on the pedestal provided on the lower floor. The vehicle body is transported on the gantry along the upper floor surface by a transport mechanism provided on the gantry. Also, since the pedestal is provided with a through space for assembling the parts from the lower floor, the parts assembling workers are placed on the upper floor and the lower floor at the same time, and the workers on the lower floor are Parts can be assembled from the bottom through the through space, and a worker on the upper floor can assemble the parts from the upper part of the vehicle body. As a result, it becomes possible to assemble the parts to the vehicle body, which have been performed one by one, in parallel and simultaneously, thereby shortening the length of the vehicle assembly line and the time required to assemble the vehicle. Is possible.

Further, since it is possible to assemble the parts from the upper part of the vehicle body and the lower part of the vehicle body at the same time, it is possible to reduce the number of times of changing the supporting method of the vehicle body as compared with the conventional method, and the changing of the supporting method. It is possible to reduce the number of times of positioning associated with.

The invention according to claim 3 is the assembly line according to claim 1 or 2, characterized in that a sub-line for assembling a component unit is provided on the lower floor. According to the third aspect of the invention, the sub-line for assembling the component unit can be installed in the lower floor, so that the area utilization efficiency of the assembly line can be improved.

According to a fourth aspect of the present invention, the parallel assembly line has a lower zone for assembling at least the suspension from the bottom of the vehicle body on the lower floor, and at least the roof lining and the instrument panel on the upper floor. The vehicle assembly line according to any one of claims 1 to 3, further comprising an interior zone for assembling the vehicle from above the vehicle body.

According to the invention as set forth in claim 4, in the parallel assembling line, it is possible to simultaneously perform the parts assembling work from the upper part of the vehicle body in the interior zone and the parts assembling work from the bottom part of the vehicle body in the lower zone. Became.

As a result, it is no longer necessary to change the vehicle body support method (see the column of "Prior Art") which has been conventionally performed between the interior zone and the lower zone, and the number of times the vehicle body support method is changed. It has become possible to reduce compared to the past. Also, since the parts are assembled from the top and bottom of the vehicle body at the same time on the parallel assembly line, the total length of the assembly line can be shortened compared to the conventional one.
Further, it has become possible to reduce the time required for assembling the parts.

According to a fifth aspect of the present invention, in the parallel assembly line, the lower floor has a first transmission line zone for assembling the underfloor concentrated piping from the bottom of the vehicle body, and the upper floor comprises:
The vehicle according to claim 4, further comprising a second transmission line zone for mounting at least the cabin harness and the radiator from the upper portion of the vehicle body and an exterior zone for mounting at least the windshield and the door from the upper portion of the vehicle body. It is an assembly line.

According to the invention of claim 5, claim 4
In addition to the invention described in 1, the assembling work of the parts in the first transmission line zone, the second transmission line zone and the exterior zone is performed in the parallel assembly line, so that the first transmission performed from the bottom of the vehicle body. It is possible to perform the work of assembling the parts in the wire passage zone and the work of assembling the parts in the second transmission wire passage zone performed from the upper part of the vehicle body at the same time. It is possible to shorten the total length of the. Further, it becomes possible to further reduce the time required for assembling the parts as compared with the invention described in claim 4.

Further, according to the invention of claim 5, various sub-lines associated with the assembly line (rear suspension unit sub-line, front suspension unit sub-line, engine / front suspension unit coupling sub-line, etc. (refer to the column of "Prior Art"). ))
Since it can be installed on the lower floor or the upper floor, the area occupied by the assembly line can be reduced as compared with the conventional one.

The invention according to claim 6 is characterized in that the parallel assembly line has a composite guarantee zone on the upper floor for at least injecting various liquids from the upper part of the vehicle body. It is a vehicle assembly line. According to the sixth aspect of the present invention, since the work in all zones of the vehicle assembly line is performed in the parallel assembly line, it is not necessary to change the vehicle support method in the vehicle assembly line. Since the entire assembly line has a so-called two-story structure, it is possible to further reduce the occupied area of the assembly line as compared with the invention according to the fifth aspect.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION The present embodiment will be described below with reference to the drawings as appropriate. First, the parallel assembly line will be described. FIG. 1 is a side view schematically illustrating the parallel assembly line, and FIG. 2 is a cross-sectional view showing the structure of the parallel assembly line.

As shown in FIG. 1, in the parallel assembly line, the vehicle body W conveys the so-called mezzanine height so that the components can be assembled in parallel from the vehicle body upper portion and the vehicle body bottom portion. To be done. On the mezzanine floor where the vehicle body is transported, two rows of upper floors 5 and 5 are provided so as to sandwich the vehicle body along the transportation direction in order for the worker to assemble parts from the upper portion of the vehicle body. The first floor is a lower floor 6 for workers to assemble parts from the bottom of the vehicle body. The workers on the upper floors 5 and 5 and the workers on the lower floor 6 can independently perform the assembly work in parallel. The height at which the vehicle body W is conveyed (the height of the upper floors 5 and 5) is preferably a height at which a worker on the lower floor 6 can work in a standing state.

FIG. 2 is a sectional view of the parallel assembly line.
The parallel assembling line is a pedestal for supporting the lower floor 6 provided on the floor surface 2, the upper floors 5 and 5 provided above the lower floor 6 by a predetermined height, the upper floors 5 and 5, and the vehicle body W. 1 and a transport mechanism 3 for transporting the vehicle body.

The gantry 1 is a first frame member 1 having a columnar shape that is erected from the floor surface 2 in a two-row column shape along the transport direction of the vehicle body W.
a (only two of which are shown in FIG. 2) extend inward from the first frame member forming each row in parallel to the floor surface 2 and are continuous along the conveyance direction of the vehicle body W. Substrate 1b and a second semi-arch standing from the floor surface 2 to support the substrate 1b and locked to the back surface of the substrate 1b.
The frame member 1c (only two of them are shown in FIG. 2). Here, the one substrate 1b and the other substrate 1b are separated by a predetermined distance 7, and various components can be assembled to the vehicle body W from the bottom of the vehicle body through the distance 7.
In addition, this interval 7 is, when assembling parts from the bottom of the vehicle body,
It is desirable to have a width that allows the parts to pass through.

The transport mechanism 3 supports rails 3a laid on each substrate 1b in parallel with the transport direction of the vehicle body W, and the vehicle body W placed on the rails 3a via the transport rollers 3b. It is composed of a carriage 3c and a motor 3d for carrying the carriage 3c in the carrying direction. Here, the rotation shaft of the motor 3d is provided in the direction perpendicular to the surface of the substrate 1b, and the roller 3e attached to the rotation shaft of the motor 3d is pressed against the side wall of the transport carriage 3c. When the motor 3d is rotated, the rotational force is transmitted to the side wall of the transport carriage 3c via the roller 3e, and the transport carriage 3c is rotated.
c is transported in the transport direction (the depth direction of the paper surface in FIG. 2). The carrier 3c is provided with a support member 3f for supporting the vehicle body W, and the vehicle body W has the support member 3f.
It is positioned and fixed at f. Further, the carrier 3c has an opening 8 having substantially the same size as the bottom surface of the vehicle body, and a worker can assemble various parts from the bottom portion of the vehicle body through the opening 8. The space 7 provided on the gantry 1 and the opening 8 of the carrier 3c correspond to the through space portion in the claims.

Further, plate members 4 and 4 are stretched in two rows on the gantry 1 along the transport direction so as to sandwich the transport vehicle 3c, forming upper floors 5 and 5. . On the upper floors 5 and 5, a worker can assemble various parts to the vehicle body W from the upper portion of the vehicle body. A floor surface below the upper floors 5 and 5 is a lower floor 6, and an operator can assemble various parts to the vehicle body W on the lower floor 6 from the bottom of the vehicle body.

Next, an embodiment of an assembly line utilizing the present invention will be described with reference to the drawings as appropriate. The first embodiment of the present invention corresponds to the invention described in claim 4, in which the parts are assembled in the interior zone and the lower zone in a parallel assembly line.

FIG. 3 is a configuration diagram (upper stage) and a layout diagram (lower stage) of the assembly line of the first embodiment of the present invention. The vehicle body W for which the painting process has been completed is carried into the assembly line while being suspended by the overhead conveyor OH1. First, in a state in which it is suspended and supported by the overhead conveyor OH1, underfloor concentrated piping is assembled from the bottom of the vehicle body in the first transmission line zone Z1. continue,
The vehicle body W is lowered and supported by the transfer device 20a from the overhead conveyor OH1 onto the transport carriage 3c of the free flow conveyor FF1 installed on the work floor surface. When the vehicle is placed and supported on the free flow conveyor FF1, positioning work of the vehicle body W is performed. Then, the cabin wire harness, the antilock brake system (ABS), the radiator and the like are assembled to the vehicle body W from the upper portion of the vehicle body in the second transmission line zone Z2.

Subsequently, the height of the carrier 3c is raised to the mezzanine level while the vehicle is placed and supported by the lifting device 20b, and the carrier 3c is introduced to the free-flow conveyor FF2 of the parallel assembling line. To be done. Incidentally, the carriage 3c
Is introduced into the parallel assembly line while supporting the vehicle body W, it is not necessary to newly position the vehicle body W, and the number of positioning of the vehicle body W can be reduced as compared with the conventional technique. Is possible.

In this embodiment, in this parallel assembly line, the interior zone Z3 and the lower zone Z
Work 4 is done in parallel. That is, on the upper floors 5 and 5, the work of assembling the components in the interior zone Z3 is performed, and the roof lining, the floor mat, and the instrument panel unit are assembled from the upper part of the vehicle body. The instrument panel unit is assembled by an instrument panel unit sub-line 25 arranged on the floor surface (first floor) in parallel with the assembly line, and is transported to the upper floors 5 and 5 by the transport device from the upper portion of the vehicle body W. It is assembled.

In parallel with the work in the interior zone Z3, in the lower floor 6 in the lower zone Z4, the fuel tank, the rear suspension unit, the engine, the front suspension assembly, the silencer, the brake hose pipes, the tires, etc. from the bottom of the vehicle body. It is assembled.

The rear suspension unit sub-line 2 for assembling the rear suspension unit so as to protrude to the side from the lower floor 6 of the assembly line.
1. A front suspension unit subline 22 for assembling a front suspension unit, an engine transfer line 23 for transferring an engine to an engine / front suspension unit coupling subline 24 described below, and an engine for connecting the front suspension unit and the engine. A front suspension unit coupling subline 24 is provided.

In the assembly line of the present embodiment, the interior zone Z3 and the lower zone Z4 can be simultaneously operated in this way, so that each zone is connected in series. It is possible to shorten the total length of the assembly line as compared with the assembly line. Further, conventionally, from the interior zone Z102 to the lower zone Z10.
When transporting 3 car bodies, free flow conveyor FF1
It is necessary to change the method of supporting the vehicle body from 00 to the overhead conveyor OH101 (Fig. 8).
Positioning of the car body was necessary. However, in the assembly line of the present embodiment, this step is performed by the transport carriage 3c.
Since the process can be changed to the ascending process, it is not necessary to position the vehicle body and the working time can be shortened.

The transfer device 2 is provided at the end of the parallel assembly line.
0c has been installed, and the body W has been installed in parallel.
Is transferred to the transfer carriage of the free flow conveyor FF3 installed on the floor surface by the transfer device 20c. At this time, since the tires have already been assembled to the vehicle body, the receiver of the carrier truck holds these tires. Subsequently, the vehicle body W is transported to the exterior zone Z5 while being placed and supported by the transportation vehicle, and the dampers from the upper portion of the vehicle body
A seat, a handle, a bumper, a window glass, and a door unit assembled by the door unit subline 26 are assembled.

Next, the vehicle body is transported to the combined guarantee zone Z6, and brake oil, washer fluid, engine oil, gasoline and the like are injected from the upper portion of the vehicle body, the battery and the like are assembled, and the vehicle is completed. The process up to this point is the assembly line, and the subsequent steps are the completed vehicle inspection line. At the completed car inspection line, it is inspected whether the completed car satisfies the performance to be satisfied.

FIG. 4 is a schematic view illustrating the manner of vehicle body transportation on the assembly line of the first embodiment. The vehicle body W, which has been suspended and supported by the overhead conveyor OH1 after the coating process, has the centralized piping assembled from the vehicle body bottom portion in that state in the first transmission line zone Z1. Subsequently, the vehicle body W is lowered by the transfer device 20a, and is positioned and supported on the transport carriage 3c of the free flow conveyor FF1 from the overhead conveyor OH1. continue,
In the second transmission line zone Z2, the above-mentioned components are assembled from the upper part of the vehicle body, and the second transmission line zone Z2
Is lifted up to the height of the mezzanine floor by the lifting device 20b at the end of, and introduced to the free flow conveyor FF2 of the parallel assembly line. In the parallel assembling line, the assembling work of the interior zone Z3 is performed from the upper part of the vehicle body on the upper floors 5 and 5 to the lower zone Z4.
The assembling work is performed on the lower floor 6 from the bottom of the vehicle body. Transfer device 2 at the end of the parallel assembly line
0c exists and the transfer device 20c transfers the vehicle body W from the free flow conveyor FF2 to the free flow conveyor FF3 existing on the floor. After that, in the exterior zone Z5 and the combined guarantee zone Z6, the above-mentioned parts are assembled from the upper part of the vehicle body, and the assembly of the vehicle is completed.

Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, in addition to the first embodiment, a parallel assembly line is adopted also in the first transmission line zone Z1, the second transmission line zone Z2 and the exterior zone Z5, This corresponds to the invention described in claim 5. In addition, in FIG.
The same numbers are given to the same configurations as those and the description thereof is omitted.

The difference between the second embodiment and the first embodiment is that the total length of the parallel assembly line is increased.
That is, the vehicle body W suspended and supported by the overhead conveyor OH1 from the painting process is transferred by the transfer device 20a to the transport carriage 3c on the mezzanine level free-flow conveyor FF4, and immediately transferred to the parallel assembly line. be introduced. In the parallel assembly line, first, in the lower floor 6, the parts are assembled in the first transmission line zone Z1 from the bottom of the vehicle body, and in parallel with this, the upper floor 5,
5, the parts are assembled in the second transmission line zone Z2 from the upper portion of the vehicle body.

Subsequently, as in the first embodiment, the assembling of parts in the interior zone Z3 is performed on the upper floors 5 and 5 from the upper part of the vehicle body, and in parallel with this, the assembling of parts in the lower zone Z4 is performed on the lower floor 6. Attachment is done from the bottom of the vehicle. Further subsequently, on the upper floors 5 and 5, the parts are assembled in the exterior zone Z5 from the upper part of the vehicle body.

When the assembly of parts in the exterior zone Z5 is completed, the vehicle body is moved from the free flow conveyor FF4 on the mezzanine floor to the free flow conveyor on the floor surface by the transfer device 20c located at the end of the parallel assembly line. The vehicle is lowered to the transport vehicle of the FF3, tire-supported by the transport vehicle, and predetermined parts are assembled in the combined assurance zone Z6 to complete the vehicle assembly. The parts assembled in each zone are the same as those described in the first embodiment.

FIG. 6 is a schematic view showing the manner of vehicle body transportation in the assembly line of the second embodiment. The vehicle body W that has been suspended and supported by the overhead conveyor OH1 after the coating process is lowered by the transfer device 20a, and is positioned and supported on the transport carriage 3c of the free flow conveyor FF4 on the mezzanine floor. Introduced to the parallel assembly line. In the parallel assembly line, from the vehicle body bottom portion to the second transmission line zone Z1 in the first transmission line zone Z1.
2, various parts are assembled in parallel from the upper part of the vehicle body. Subsequently, various parts are assembled in parallel from the upper portion of the vehicle body in the interior zone Z3 and from the bottom portion of the vehicle body in the lower zone Z4.

Then, the vehicle body W is moved to the exterior zone Z5.
Then, various parts are assembled from the upper part of the vehicle body in the exterior zone Z5. After that, the vehicle body is transferred from the parallel assembly line by the transfer device 20c to the free-flow conveyor FF3 installed on the floor surface, and various components are assembled in the combined guarantee zone Z6, and the assembly of the vehicle is completed.

As described above, in the second embodiment,
Since the parts assembling work in the first and second transmission line zones is simultaneously performed in parallel by the parallel assembling line,
It is possible to reduce the total length of the assembly line and the time required for vehicle assembly as compared with the above embodiment.

Further, since the assembling work in the exterior zone Z5 is also performed by the parallel assembling line, the total length of the parallel assembling line is longer than that of the first embodiment. As a result, as shown in the layout of FIG. 5, various sub-lines can be stored in the parallel assembly line.

More specifically, in the first embodiment, the rear suspension unit sub line 21,
Front suspension unit subline 22, engine / front suspension unit coupling subline 24, instrument panel unit subline 25
Although the door unit sub-line 26 is installed so as to protrude from the side of the assembly line (FIG. 3), since the parallel assembly line is long in the second embodiment, these lines are installed in parallel. It can be stored in the upper floors 5, 5 and the lower floor 6.

That is, the rear suspension unit subline 21, the front suspension unit subline 22, and the engine / front suspension unit coupling subline 24 are housed inside the lower floor 6,
The instrument panel unit sub-line 25 and the door unit sub-line 26 are provided on the upper floors 5 and 5. As a result, the area occupied by the assembly line can be reduced as compared with the first embodiment, and the area utilization efficiency of the assembly line is significantly increased.

Further, in the first embodiment, the lifting device 20b is used when the vehicle body W is transferred from the second transmission line zone Z2 to the parallel assembly line (FIG. 3, FIG.
4), in the second embodiment, since the vehicle body W is immediately introduced into the parallel assembly line after the coating process is completed, the lifting device 2
It is not necessary to provide 0b, and the installation cost of the assembly line can be reduced.

Next, a third embodiment of the present invention will be described with reference to FIG. The third embodiment, in addition to the second embodiment, performs the work in the combined guarantee zone Z6 on the parallel assembly line, and corresponds to the invention described in claim 6. In FIG. 7, the same components as those in FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted.

The third embodiment employs a parallel assembly line in all zones (Z1 to Z6) in the assembly line. That is, the vehicle body W that has been suspended and supported by the overhead conveyor OH1 from the painting process is immediately placed and supported by the transfer carriage 3c on the mezzanine level free-flow conveyor FF4 by the transfer device 20a, and on the lower floor 6. , Parts are assembled in the first transmission line zone Z1 from the bottom of the vehicle body, and in parallel with this, parts in the second transmission line zone Z2 are assembled from the top part of the vehicle body in the upper floors 5, 5. .

Subsequently, assembling of parts in the interior zone Z3 on the upper floors 5 and 5 is performed from the upper part of the vehicle body, and in parallel with this, the lower floor zone Z4 on the lower floor 6.
The parts are assembled from the bottom of the vehicle body. Further subsequently, on the upper floors 5 and 5, the parts are assembled in the exterior zone Z5 from the upper part of the vehicle body. Finally, on the upper floors 5 and 5, the parts are assembled in the combined guarantee zone Z6 from the upper part of the vehicle body, and the assembly of the vehicle is completed. After the assembly is completed, the vehicle is lowered to the floor surface from the free-flow conveyor FF4 on the mezzanine floor by the transfer device 20c existing at the end of the parallel assembly line, and the vehicle is self-propelled and inspected for the completed vehicle. The parts assembled in each zone (Z1 to Z6) are the same as those described in the first embodiment.

Incidentally, the state of the vehicle body transportation of the assembly line of the third embodiment is that only the compound guarantee zone Z6 is added after the exterior zone Z5 of the parallel assembly line in FIG. Is omitted.

As described above, in the third embodiment,
Since all the zones of the vehicle assembly line are implemented by the parallel assembly line, it is possible to reduce the total length of the assembly line and the time required for vehicle assembly as compared with the first embodiment.

Further, since all the assembly lines are constituted by parallel assembly lines, the total length of the parallel assembly lines is the longest among the three embodiments described above, and the various sub-lines accommodated in the parallel assembly lines are the same. The degree of freedom in layout is higher than that in the second embodiment.

The upper floor 6, the lower floors 5 and 5 are the mounts 1
It is not limited to the above, and may be configured by the building itself.
For example, the car body is transported along the floor surface of the second floor (upper floor), the parts are assembled from the second floor to the upper part of the vehicle body, and the through space is provided on the floor surface of the second floor to provide the first floor (lower floor). From the floor), the parts may be assembled to the bottom of the vehicle body through the through space. Also, suspend and transport the car body, and the worker at the bottom assembles the parts to the bottom of the car body (lower floor), and provides another scaffold (upper floor) to assemble the parts from the top of the car body. Is also good.

[0061]

Since the present invention is constructed as described above,
It has the following remarkable effects. The vehicle assembly line of the present invention has a so-called two-story work floor, which is a parallel assembly line. As a result, parts are assembled from the bottom of the vehicle on the lower floor and parts from the upper part of the vehicle are simultaneously assembled on the upper floor in parallel. Therefore, it is possible to shorten the total length of the assembly line and the time required for assembly (Claim 1).

In the vehicle assembly line of the present invention, the upper floor for transporting the vehicle is installed on the pedestal provided on the lower floor. The pedestal is provided with the through space for assembling the parts from the lower floor. Therefore, the worker can simultaneously assemble the parts from the vehicle body bottom portion (lower floor) and the vehicle body upper portion (upper floor) in parallel. This makes it possible to reduce the total length of the vehicle assembly line and the vehicle assembly time. Furthermore, by using the parallel assembling line, it is possible to reduce the area occupied by the lines (claim 2).

Since the vehicle assembly line of the present invention can accommodate the sub-line for assembling the component units in the lower floor, the area occupied by the assembly line can be made smaller than the conventional one. (Claim 3).

The vehicle assembly line of the present invention is a parallel assembly line for assembling parts in the lower zone where parts are assembled from the bottom of the vehicle body and assembling parts in the interior zone where parts are assembled from the top of the vehicle body. It is possible to reduce the work of changing the method of supporting the vehicle body that has occurred during the transition from the interior zone to the lower zone. Further, since the parts are assembled from the upper floor and the lower floor to the vehicle body bottom portion and the vehicle body upper portion at the same time, the total length of the assembly line and the time required for vehicle assembly can be shortened as compared with the conventional case. Item 4).

In the vehicle assembly line of the present invention, in addition to the invention described in claim 4, the parts assembling work in the first and second transmission line zones and the exterior zone is performed in the parallel assembling line. As compared with the invention described in claim 4, the total length of the assembly line can be shortened. Furthermore, various sub-lines can be installed on the lower floor and the upper floor of the parallel assembly line, and the area occupied by the assembly line can be reduced (claim 5).

In the vehicle assembly line of the present invention, since the parts assembling work in all zones is carried out in the parallel assembling line, the whole assembling line has a so-called two-story structure. Compared with, the degree of freedom in layout of various sub-lines accommodated in the parallel assembly line is increased (claim 6).

[Brief description of drawings]

FIG. 1 is a side view schematically illustrating a parallel assembly line.

FIG. 2 is a cross-sectional view showing the structure of a parallel assembly line.

FIG. 3 is a configuration diagram and a layout diagram of an assembly line according to the first embodiment of the present invention.

FIG. 4 is a schematic diagram illustrating how an assembly line according to the first embodiment of the present invention conveys a vehicle body.

FIG. 5 is a configuration diagram and a layout diagram of an assembly line according to a second embodiment of the present invention.

FIG. 6 is a schematic diagram illustrating how a vehicle body is conveyed on the assembly line according to the first embodiment of the present invention.

FIG. 7 is a configuration diagram and a layout diagram of an assembly line according to a third embodiment of the present invention.

FIG. 8 is a configuration diagram and a layout diagram of a conventional assembly line.

FIG. 9 is a schematic diagram illustrating how a conventional assembly line conveys a vehicle body.

[Explanation of symbols]

1 stand 1a First frame material 1b substrate 1c Second frame material 2 floor side 3 Transport mechanism 3a rail 3b Conveyor roller 3c carrier truck 3d motor 3e roller 4 plate materials 5 Upper floor 6 lower floor

Claims (6)

[Claims] 1. A lower floor for assembling parts from the bottom of a vehicle body to a vehicle body after a painting process, in which the parts are sequentially assembled to the vehicle body and which is subjected to inspection to be a completed vehicle. A vehicle assembly line comprising a parallel assembly line including an upper floor for assembling parts from the upper part of the vehicle body to the vehicle body. 2. The parallel assembly line includes a gantry provided on the lower floor and a transport mechanism for transporting a vehicle body on the gantry, and the gantry for assembling parts from the lower floor. The vehicle assembly line according to claim 1, wherein a through space is provided. 3. The assembly line according to claim 1, wherein a sub line for assembling the component unit is provided in the gantry. 4. The parallel assembly line is on a lower floor,
4. A lower zone at least for mounting the suspension from the bottom of the vehicle body, and an upper floor having an interior zone for mounting at least the roof lining and the instrument panel from the upper side of the vehicle body. The vehicle assembly line according to any one of 1. 5. The parallel assembly line is on the lower floor,
It has a first transmission line zone for assembling underfloor concentrated piping from the bottom of the vehicle body, and a second transmission line zone for assembling at least the cabin harness and radiator from the top of the vehicle body on the upper floor, and at least a windshield and The vehicle assembly line according to claim 4, further comprising an exterior zone for assembling the door from the upper portion of the vehicle body. 6. The parallel assembly line is on the upper floor,
The vehicle assembly line according to claim 5, wherein the vehicle assembly line has a compound guarantee zone for at least injecting various liquids from an upper portion of the vehicle body.