JPH04215580A - Workpiece assembly processing method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of assembling a pair of workpieces, such as left and right doors of an automobile, by performing a plurality of common assembly processing operations on the workpieces.

0002

[Prior Art] Conventionally, for example, on an automobile assembly line, it has been known that the left and right doors are once removed from the car body, then both doors are fitted out, and after the fitting out, both doors are reattached to the car body. There is.

[0003] In this type of assembly line, the left and right doors removed from the vehicle body are assembled using almost the same assembly procedure, but most of the parts to be assembled are different for the left and right, so usually In the door outfitting line, the parts are intermittently conveyed synchronously on different conveyance paths, and each piece is assembled separately when stopped during the conveyance.

[0004] In such a door outfitting line, when assembly processing work for each door is performed by an assembly processing device such as a robot, the assembly processing device is allocated to the door fitting line separately for the right door and the left door. It is known that the left and right doors are assembled using separate assembly processing apparatuses.

However, in such a door outfitting line, even when the left and right doors are subjected to a common assembly processing operation, the left and right doors are assembled using separate assembly processing equipment, so that the assembly processing is performed separately. This method requires a large number of devices, increases the size of the line configuration, and is disadvantageous in terms of cost.

[0006] Furthermore, in this type of door outfitting line, the left and right doors have a symmetrical structure, so assembly processing operations such as applying sealer, for example, are carried out using a common door installed between the transport paths of each door. There is also known a system in which the left and right doors are sequentially assembled using a robot or the like.

However, in such a door outfitting line, the left and right doors are transported synchronously as described above, so when the left and right doors are assembled by a common assembly processing device, the left and right doors are The left and right doors must be sequentially assembled by the assembly processing device while both are stopped at the location of the assembly processing device, which increases the stopping time of both doors and slows down the line speed. This had the disadvantage of reducing the efficiency of the outfitting line. In order to solve this problem, if you try to increase the line speed,
It is necessary to shorten the assembly processing time by the above-mentioned assembly processing apparatus, and in such a case, there is a possibility that the assembly processing becomes uncertain.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method that eliminates such inconvenience and allows a pair of workpieces, such as left and right doors of an automobile, to be efficiently assembled using a common assembly processing device. With the goal.

[0009]

[Means for Solving the Problems] In order to achieve the above object, the present invention is a method of assembling a pair of workpieces by performing a plurality of common assembly processing operations on the workpieces, and in which each workpiece is assembled on its assembly line. The assembly line is conveyed separately by a pair of conveyance paths arranged parallel to each other, and is alternately carried in and out of each assembly processing station arranged on the assembly line, and the common assembly processing work is performed by this conveyance. The present invention is characterized in that a single assembly processing device sequentially performs assembly processing on both workpieces that are alternately carried into a processing station.

[0010]Furthermore, in the assembly processing station where assembly processing is performed by the assembly processing device, one of the workpieces is assembled by the assembly processing device, and the other workpiece is assembled by the assembly processing device. After the work is carried into the assembly processing station and the one workpiece is assembled,
The one workpiece is carried out from the assembly processing station in response to the return of the assembly processing device to its original position, and the other workpiece is assembled by the assembly processing device in parallel with the carrying out. .

[0011]

[Function] According to the present invention, both the workpieces are transported separately by the pair of transport paths and are alternately carried in and out of each of the assembly processing steps, so that the assembly processing device performs the assembly processing of both the workpieces. can be performed alternately and continuously.

In this case, in the assembly processing station where the assembly processing is performed by the assembly processing device, one of the workpieces is assembled by the assembly processing device, and the other workpiece is assembled by the assembly processing device. After the work is carried into the assembly processing station and the one workpiece is assembled,
When one of the workpieces is carried out from the assembly processing station in response to the return of the assembly processing device to its original position, and the other workpiece is assembled and processed by the assembly processing device in parallel with the carrying out, both workpieces are It becomes possible to perform transportation and assembly processing efficiently.

[0013]

[Example] Fig. 1 shows an example of the workpiece assembly processing method of the present invention.
and will be explained according to FIG. FIG. 1 is an explanatory plan view of an automobile door fitting line, and FIG. 2 is a timing chart for explaining its operation.

In FIG. 1, 1R and 1L are conveyance paths for the right door 2R and left door 2L, which are workpieces, respectively. , 3. Each door 2R, 2L is placed on a pallet 5 that is intermittently conveyed on each conveyor 3, together with a parts box 4 containing parts (not shown) to be assembled thereto, and is conveyed to each conveyor via the pallet 5. 3. The above is intermittently conveyed at the timing described below. In this case, each of the doors 2R, 2L is placed on the pallet 5 so as to be tiltable between a substantially vertical position and a substantially horizontal position, and is adjusted as appropriate by a tilting device (not shown) during transportation. It is designed so that it can be tilted.

In the figure, Sn-1 to Sn+1 are the n-1st,
These are the n-th and n+1-th assembly processing stations, and among these stations Sn-1 to Sn+1, for example, the assembly processing station Sn has an assembly processing device such as a sealer application robot at the center position between the conveyors 3 and 3. 6 is installed. The working arm 6a of the assembly processing device 6 is able to swing left and right from a neutral position shown by solid lines in the same figure toward the doors 2R, 2L on each conveyor 3.

Next, the operation of such a door fitting line is shown in FIG.
and will be explained according to FIG. In this door outfitting line, as shown in FIG. 2, the right door 2R and the left door 2L are periodically transported intermittently with timing shifted by a predetermined time interval T1 on each transport path 1R, 1L, and both doors 2R ，
While one door 2L is stopped, the other door 2R, 2L is transported.

That is, both doors 2R and 2L are alternately carried in and out of each assembly processing station Sn-1 to Sn+1, etc. For example, while the right door 2R is stopped at the assembly processing station Sn, the left door 2L is stopped at the assembly processing station Sn. is transported from the assembly processing station Sn-1 toward the assembly processing station Sn, and furthermore, the assembly processing station Sn
While the left door 2L carried in is stopped at the station Sn, the right door 2R is carried out from the station Sn to the next assembly processing station Sn+1.

The assembly processing device 6 operates at the timing shown in FIG. 2, performs a predetermined assembly processing on the right door 2R while the right door 2R is stopped at the assembly processing station Sn, and then , after the assembly process, the right door 2
While R is carried out from the assembly processing station Sn,
While the left door 2L is carried into the assembly processing station Sn and stopped, the left door 2L is subsequently subjected to assembly processing.

More specifically, the assembly processing device 6 moves its work arm 6a to the right door 2R almost simultaneously when the right door 2R is carried into the assembly processing station Sn and is stopped.
The right door 2R is then moved toward a predetermined position of the right door 2R, and after that, a predetermined assembly process is performed on the right door 2R while the right door 2R is completely stopped. After this assembly processing, the work arm 6a of the assembly processing device 6 is returned to the neutral position, and after the return, the right door 2R is moved from the assembly processing station Sn to the next assembly processing station Sn.
Exported to +1.

In this case, as shown in FIG. 1, when the right door 2R is carried into the assembly processing station Sn,
It is tilted from a substantially vertical position to a substantially horizontal position, and is stopped in the substantially horizontal position at the assembly processing station Sn. Then, when being carried out to the assembly processing station Sn+1, it is again tilted to a substantially vertical position.

On the other hand, during the assembly process of the right door 2R, the left door 2L is gradually tilted from a substantially vertical position to a substantially horizontal position in parallel with the assembly processing station Sn.
Almost simultaneously with the completion of the assembly process of the right door 2R, it is carried into the assembly process station Sn and stopped in a substantially horizontal position. At this time, the assembly processing device 6 causes the working arm 6a to approach a predetermined position of the left door 2L following the return to the neutral position, and after that, the left door 2L comes to a complete stop. In this state, the door 2L is assembled in the same manner as the right door 2R. After this assembly processing, the work arm 6a of the assembly processing device 6 is returned to the neutral position, and after the return, the left door 2L is gradually tilted to a substantially vertical position while moving away from the assembly processing station Sn. This operation is then repeated.

[0022] In this way, the assembly processing by the assembly processing device 6 is efficiently performed alternately and continuously on the right door 2R and the left door 2L. In this case, each door 2R,
When carrying out the door 2L from the assembly processing station Sn after the assembly processing, each door 2R, 2L is carried out after the work arm 6a of the assembly processing device 6 returns to the neutral position. Arm 6a and each door 2R,
2L and 2L do not interfere with each other, and the transportation and assembly process of each door 2R and 2L can be carried out smoothly.

[0023]

Effects of the Invention As is clear from the above description, according to the present invention, a pair of workpieces are transported separately by the pair of transport paths, and are alternately carried in and out of each of the assembly processing steps. By using a single assembly processing device to perform assembly processing sequentially on both workpieces that are alternately carried into an assembly processing station where a common assembly processing operation is performed, both workpieces can be sequentially processed using a common assembly processing device. Assembling processing can be performed efficiently, and the efficiency of the workpiece assembly line can be improved.

Further, in an assembly processing station where assembly processing is performed by an assembly processing device, one of the two workpieces is assembled by the assembly processing device and the other workpiece is assembled in parallel with the assembly processing station equipped with the assembly processing device. After the assembly processing of the one workpiece is carried out, the one workpiece is carried out from the assembly processing station in response to the return of the assembly processing device to the original position, and the other workpiece is carried out in parallel with the carrying out. By performing the assembly processing using the assembly processing device, the transportation and assembly processing of both workpieces can be carried out extremely smoothly and efficiently.

[Brief explanation of the drawing]

FIG. 1 is an explanatory plan view of an automobile door fitting line to which an example of the present invention is applied.

[Figure 2] Timing chart for explaining the operation of the outfitting line

[Explanation of symbols]

1R, 1L Conveyance path 2R, 2L Door (work) 6 Assembly processing equipment

Claims (2)

[Claims] Claim 1: A method for assembling a pair of workpieces by subjecting them to a plurality of types of common assembly processing operations, wherein each workpiece is individually conveyed through a pair of conveyance paths arranged parallel to each other on the assembly line. The workpieces are conveyed and alternately carried in and out of each assembly processing station arranged on the assembly line, and by this conveyance, a single assembly is carried out on both workpieces which are alternately carried into the assembly processing station where the common assembly processing work is performed. A method for assembling a workpiece, which is characterized by sequentially assembling the workpiece using a processing device. 2. In an assembly processing station where assembly processing is performed by the assembly processing device, one of the two workpieces is assembled by the assembly processing device, and the other workpiece is assembled by the assembly processing device. The first workpiece is carried into the assembly processing station, and after the assembly processing of the one workpiece, the one workpiece is carried out from the assembly processing station in accordance with the return of the assembly processing device to the original position, and in parallel with the carrying out, the other workpiece is assembled. 2. The workpiece assembly processing method according to claim 1, wherein said workpieces are assembled by said assembly processing apparatus.