JPS62110580A - Car assembly method - Google Patents

Abstract

PURPOSE:To simplify equipment for assembly of car body mains by incorporating such an arrangement that three items of parts, i.e. air box, roof and parcel shelf are fed in a lump using a trolley loader, and thereby reducing the number of loaders to be used. CONSTITUTION:An overhead type trolley loader 16 is installed over a pair of slide packs consisting of an assembly jig fitted with fixtures, spot welding gun, etc. which are to decide relative locations of components of the body main, and the loader 16 travels along a circulative track leading from the packs to storage areas 8-10 as parts standby position. Both side-panels S and floor main F carried in previously to the assembly stage 30 are located, and in this condition, the trolley loader 16 grasping air box A, roof R and parcel shelf P shall be carried to the stage 30. After location with respect to floor main F and both side-panels S, welding is performed to accomplish consolidation.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for assembling an automobile, and more particularly to a method for assembling a main body, which is the framework of an automobile.

As is well known in the art, the assembly of the main body of an automobile is carried out in the 7th stage.
As shown in the diagram, floor main F, body side S, air box (cowl top panel) A8 rear panel Re,
This is done for each part such as the roof R and the parcel shelf P (however, the roof rail L (Lr has been temporarily assembled to the roof R in advance).And it is difficult to assemble all these parts at once. , for example, is carried out in several steps on the main body line shown in Figure 6.
(see 1).

Incidentally, a similar structure is disclosed in JP-A-50-89976.

To be more specific, at stage i"St in FIG. 6, the floor main F is put into the line by a drop lifter, etc., and the floor main F is sequentially conveyed to the next process by a brain shuttle conveyor, etc. Then, at stage S, The rear panel Re is loaded, and furthermore, at stage S3, the body side S is loaded by a drop lifter or the like, and the parcel shelf P and air box A are loaded by the loaders R, , R2.

The above-mentioned parts introduced up to stage S3 are welded after the mutual positional accuracy of the parts is determined by the assembly jig of stage S3. E and E are the storage areas of air box A and parcel shelf P.

In addition, stage S of idol or extra hit.

After passing through S8, the roof R is loaded by the loader R3 from the roof storage area E3 in stage S7, and the roof R is welded (temporarily welded) after positional accuracy is determined in the next stage S8.

Problems to be Solved by the Invention Among the several stages mentioned above, stage S in particular is an extremely important stage in the sense that it determines the accuracy of the automobile frame, but it is difficult to solve the problem when multiple parts are introduced from multiple directions. As a result, drop lifters and loaders will be crowded together. Therefore, together with fixtures and welding equipment that control the positioning of the main body components, the entire stage becomes complicated, which significantly limits the operating range of the fixtures and welding equipment, and reduces the versatility of the line. become.

Furthermore, under the complicated situation described above, it is extremely impossible to insert even the roof R at stage S3, and therefore the roof must be assembled at another stage S7. For this reason, the welding process, which determines the assembly accuracy of the main body, is divided into two processes, stage S and stage 67, and a significant improvement in assembly accuracy cannot be expected.

Means for Solving the Problems The present invention solves the above problem by employing a loader that can load a plurality of parts into a predetermined assembly jig at once while maintaining the relative positional relationship of the plurality of parts. This is an attempt to solve the problems of

Specifically, above the assembly jig of stage S3, a trolley loader that runs on an orbit connecting the assembly jig and the parts waiting position is installed, and the floor main and body sides are installed in advance in the assembly jig. At the same time, the air box, roof, and parcel shelf, which are to be assembled to the main floor and body sides, are assembled from the parts standby position using a trolley loader while maintaining the relative positional relationship of these three parts when the assembly is completed. It is assembled by putting it all at once into the tool.

In other words, the present invention provides an air box that must be assembled from above to the floor main and body side.
This method involves loading the three parts, the roof and the parcel shelf, all at once using a trolley loader.

Embodiment FIG. 4 schematically shows a body main line to which the method of the present invention is applied, and as is clear from comparison with FIG. 6, the conventional stage S3 and stage S7 are substantially combined. A stage 330 is configured.

Figures 1 to 3 show the details of this stage Sho, and as is clear from Figure 2, stage S3° has a slideable assembly jig as described in Japanese Patent Application Laid-open No. 57-147973. A pair of slide backs! A drop lifter D is disposed above the slide back 1, and a fixture, a spot welding gun, etc., for positioning the main body components relative to each other are attached to the slide back 1.

2 is a loader for loading the rear panel Re. This loader 2 has a function of raising and lowering a base part 4 by a cylinder 3, a function of rotating a bed part 6 by another cylinder 5, and a rear panel clamping function by a clamper 7. The rear panel Re will be positioned with respect to the body side S. However, the rear panel Re can also be set on the previous stage S, as in the conventional case (FIG. 6), and in that case, it is not necessary to provide the loader 2 on the stage Sho.

A storage area 8 for an air box A, a strain area 9 for a roof R, and a storage area 10 for a parcel shelf P are provided on the side of the slide back I.

As shown in FIG. 3, the storage area 8 includes a storage conveyor 11 for storing a plurality of air boxes A, and a lid 12 disposed adjacent to the storage conveyor 11. Then, the lifter 12 sequentially picks up the air boxes A on the storage conveyor 11 one by one onto the pedestal 13 and raises them to the parts standby position Q. The above configuration is basically the same for the storage area 10 of the parcel shelf P, so
Regarding storage area 1.0, storage area 8
The same symbol is attached. Furthermore, the storage area 9 of the roof R is also provided with a storage conveyor (not shown) and a lift lid 14 in FIG. 3. Then, the lifter 14 sequentially raises the roof R on the storage conveyor one by one to the upper limit position, which is the component standby position Q.

Slide back 1 and each storage area 8゜9.1
A rail 15 as a circulating track is arranged above 0, and an overhead type trolley loader 16 runs on this rail 15. As shown in FIG. 1, the trolley loader 16 is equipped with a self-propelling mechanism 17 mainly composed of an electric motor, and is self-propelled by receiving electrical energy from a power supply track 18 attached to the rail 15.

As shown in FIGS. 1 and 3, the hanger 19 of the trolley loader 16 has a plurality of levers 20.
is installed. Then, the clamper 20 grips the air box A, the clamper 22 grips the parcel shelf P, and the remaining clamper 21 grips the roof R. Here, when each clamper 20, 21, 22 grips the air box A, roof R, and parcel shelf P as shown in Fig. 2, the relative positional relationship of these three parts is the relative positional relationship at the time of assembly completion. The arrangement of each clamper 20, 21, 22 is determined so as to match.

As shown in FIG. 1, a part of the rail 15 is divided into a movable rail 15a directly above the slide back l, and this movable rail 15a is connected to a lift cylinder 23. Therefore, by stopping the trolley loader 16 on the movable rail 15a and operating the lift cylinder 23, the trolley loader 16 moves up and down together with the movable rail 15a.

An embodiment of the method of the present invention will be explained step by step based on the above-mentioned apparatus as follows.

First, as shown in FIG. 2, the main floor F is moved from the previous stage S to the stage S by a plane shuttle conveyor (not shown). and transferred to the glue lid 24 in FIG. When the floor main F is positioned, the loader 2 sets the rear panel Re on the floor main F, while the body side S is passed from the drop lifter D to the slide back 1, and the slide back 1 moves forward. The body side S is positioned with respect to the floor main F.

On the other hand, the trolley loader 16 is in the air box A at the parts standby positions Q, Q, shown in FIGS. 1 and 3.

Clamper 20 for roof R and parcel shelf P.
It is clamped at 21.22 and is on standby at standby position Q with each part gripped. Then, after the body side S is assembled, the slide back 1 is entered.

Subsequently, when the trolley loader 16 stops on the movable rail 15, the trolley loader 6 descends together with the movable rail 15a, as shown in FIG.
．． Airbox A supported by 22.

Set the roof R and parcel shelf P to the floor main F and body side S, respectively. When the fixture of the slide back l positions the above three parts, the clamp 20 on the trolley loader 16 side
．． 21. , 22 release those parts, and the trolley loader 16 rises together with the movable rail 1.5a and then moves by itself to the parts waiting position Q, , Q.

Thereafter, the body main components introduced up to the stage 33G are welded and assembled together using a welding device provided on the slide back 1 and a welding robot (not shown).

Body main B assembled at stage Sso
are sequentially conveyed to the next stage S4 by a plane shuttle conveyor (not shown), where additional printing is performed.

FIG. 5 is a diagram showing another embodiment of the present invention, in which the rail 15.1 is an orbit orbiting around the slide back l.
Two loaders 5A are arranged, and the loader entering the slide back 1 is selectively switched between the trolley loader 16 and the trolley loader 16A at a point 25. According to this embodiment, it is possible to assemble the main bodies of two types of vehicles.

Effects of the Invention According to the present invention, the three parts of the air box, roof, and parcel shelf are loaded all at once using a trolley loader, which greatly reduces the number of loaders.
Complex equipment can be avoided.

In addition, as a result of the simplified equipment configuration, the operating range of fixtures and welding equipment can be widened, and the versatility of these equipment is improved.

Additionally, since the roof assembly, which was previously done in a separate process, is now done in one process, it is expected that the accuracy of the body assembly will be improved by consolidating the accuracy-providing process, which was previously divided into two processes, into one process. .

[Brief explanation of drawings]

FIG. 1 is a diagram of an assembly apparatus using the method of the present invention, and FIG.
Fig. 2 is a plan view of the entire assembly device, Fig. 3 is a view taken from the direction shown in Fig. 2, and Fig. 4 is a schematic view of the main body line including the assembly device. , FIG. 5 is a schematic diagram showing another embodiment of the present invention, FIG. 6 is a schematic diagram of a conventional body main line, and FIG. 7 is an exploded view of the body main components. ■・・・Slide back as an assembly jig, 8.910
...Storage area, 15...Rail, 16...
Trolley loader, 20.21.22... Clamper,
Q,, Q2...Parts standby position, F...Floor main, S...Body side, A...Air box, R
...Roof, P...Parcel shelf. 2 people outside Figure 4 @ Figure 6

Claims (1)

[Claims] (1) A method of assembling the main body, which is the framework of an automobile, by putting multiple body main components into an assembly jig, in which the assembly jig and a parts waiting position are connected above the assembly jig. A trolley loader running on an orbit is installed, and the floor main and body side of the body main components are placed in advance into the assembly jig, while the air box and roof that are assembled to the floor main and body side are installed. An automobile assembly characterized in that three parts of a parcel shelf are loaded and assembled all at once into an assembly jig from a parts standby position using a trolley loader while maintaining the relative positional relationship of the three parts at the time of completion of assembly. Method.