JPS6369557A - Automatic preventing system for color fogging of vehicle body - Google Patents

Abstract

PURPOSE:To prevent the color fogging of vehicle bodies without requiring manual labor and to permit smooth execution of respective operations, by automatically executing the adjustment of lining-up of vehicle works in a stage before a finish coating stage and charging of the vehicle works to the finish coating stage. CONSTITUTION:The recognition information of the vehicle works 20a-20k carried into and out of reorganizing lines 12, 14 from the previous stage 10 are detected in a recognition information input means 22. The vehicle works to be charged to the lines 12, 13 and the finish coating stage 14 are instructed in accordance with the prescribed conditions in an arithmetic processing unit 30; in addition, the data on the lining up of the vehicle works in the lines 12, 13 are formed in accordance with said recognition information and the respective sets of the recognition information and conditions are written and stored. The respective stages and lines are controlled in accordance with the instructions from the unit 30 in a line control panel 32. The kinds of the vehicle work to be charged to the lines 12, 13 and the conditions on the lining up of the vehicle works with which the color fogging arises are set in a condition input device 34. The color fogging of the vehicle bodies in the stage 14 is thus prevented.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is a system for automatically preventing color cast on a car body, and in particular, a system for automatically preventing color cast on a car body by adjusting the arrangement of vehicle works carried into the car body topcoating process. The present invention relates to a device for preventing.

[Prior Art] When painting car bodies in automobile factories, different colors are often painted on the same line in each painting process.Especially in recent years, with the diversification of consumer tastes,
The number of types of car body paint colors is also increasing significantly.

By the way, in the painting process, painting is generally done with the same gun, so if a vehicle painted in a light color (for example, white) is entered in succession to a vehicle painted in a dark color (for example, red or black), the light color of the car behind it will be There have been reports that the dark paint used to paint the previous car has adhered to the car body, causing a so-called color cast, resulting in some cars being painted poorly. In particular, the occurrence of such a color cast in the top coating process, which is an important process for imparting beauty and color to the car body surface and improving product value, has been a serious defect.

Conventionally, in order to prevent color cast in the top coating process of automobiles, workers in the process before the top coating process, generally the wet sanding process, had to identify the color using a color code set on the car body during the wet sanding process. After making a judgment, a bin is set up only for dark-colored vehicles, and the bin is used as a guide to feed the vehicle into the bypass line attached to the pre-process of the top coating process. While checking the color of the vehicle, dark-colored vehicles on the bypass line were put into the overcoating process as appropriate to prevent light-colored vehicles from immediately following dark-colored vehicles, thereby preventing color cast.

However, with such conventional artificial methods, in addition to being prone to errors in judgment, there is also the problem of increasing the number of man-hours for new work such as the aforementioned pin setting and selection of vehicles to be input into the top coating process. was there.

In addition, if a worker forgets to input a vehicle in the bypass line to the top coating process due to carelessness, the opportunity to input is lost, and in the worst case, the bypass line is filled with vehicles. There was a problem in that the line stopped and work in the previous process was interrupted.

Purpose of the Invention The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to automatically adjust the arrangement of vehicle workpieces in the pre-process of the topcoat painting process and to automatically input the vehicle workpieces into the topcoat painting process. To provide an automatic vehicle body color cast prevention system capable of preventing color cast on a vehicle body without human intervention.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a plurality of work reorganization lines between the top coating process of the vehicle body and the preceding process to adjust the arrangement of the vehicle works. A system for preventing color cast on a vehicle body in a top coating process, comprising an identification information input means for detecting identification information of vehicle workpieces carried in and out of each process and line, and a vehicle workpiece carried out from the preceding process based on predetermined conditions From the reorganization line where vehicle work is brought in and from each organization line - instructs the vehicle work to be input into the painting process, and also creates vehicle work arrangement data in each reorganization line based on the identification information. an arithmetic processing unit that writes and stores each of the identification information and conditions, a line control panel that controls each process and line based on instructions from the arithmetic processing unit, and the type and color of vehicle work to be input into each of the reorganization lines. The present invention is characterized in that it has a condition input device for setting conditions for the arrangement of vehicle workpieces in which fog occurs, and is characterized in that it prevents color fog on a vehicle body in the top coating process.

[Example] Preferred embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows the overall configuration of an automatic vehicle body color cast prevention system according to the present invention and its relationship with a production line. In the figure, top coating process 1 on production line 100
A vehicle work reorganization line consisting of a main line and a bypass line 13 is arranged in parallel between 4 and its preceding process 10 (generally a wet polishing process), and a plurality of types of Vehicle work 20a-20k
flow, and a predetermined painting operation is performed in each step 10.14. In this embodiment, the reorganization lines 12 and 13 are lines for adjusting the arrangement of vehicle workpieces, and no actual painting work is performed on these reorganization lines.

15.17 is a traverser for carrying the workpiece carried out from the previous process 10 to the bypass line 13, and also for conveying it from the bypass line 13 to the top coating process 14,
Each is driven by a drive unit 16,17.

An identification information sensor 22 for detecting the identification information of the work carried out from the previous process 10 is located near the vehicle work entry entrance of the reorganization line 12.13, and limit switches 24 and 26 are located near the exit, respectively. A limit switch 28 is installed at the entrance of the top coating process 14. These identification information sensors and each limit switch are connected to an arithmetic processing unit 30 whose internal configuration is shown in FIG. The arithmetic processing unit 30 is provided corresponding to the identification information sensor 22 and each limit switch 24, 26, 28, and receives signals 36.2 from these sensors and each limit switch. 3g, 40° 42, and a central processing unit 60 that processes the signals received through each input section according to a predetermined program. The input unit 56 receives input from the condition input device 34 for specifying the type of workpieces to be carried into each reorganization line 12 and 13 and inputting the conditions for arranging the workpieces in which a color cast occurs in the topcoating process 14. The central processing unit 60
and output to the storage unit 62. In the storage section 62, various conditions from the condition input device 34 and identification information of each workpiece processed by the central processing section 60 are written and stored at predetermined addresses. The output unit 58 of the arithmetic processing unit 30 outputs a command signal 44 based on the calculation results in the central processing unit 60 to the line control board 32, which controls each process and line on the production line 100. , and the drive unit 16.18 of the traverser 15.17 that communicates each process with the bypass line is controlled by the command signal 44.
control according to

The arithmetic processing device described above can be easily configured using a microcomputer or the like.

The automatic color cast prevention system according to this embodiment has the above configuration, and its operation will be explained next.

Normally, car body paint colors are classified into three types: dark colors (e.g. red and black), light colors (white and burl white), and intermediate colors (e.g. silver metallic, gray, etc.), but color cast occurs during the top coating process. As mentioned above, this is only done when a light-colored vehicle immediately follows a dark-colored vehicle. In other words, color cast on the vehicle body does not occur unless the vehicles are lined up in dark and light colors. Therefore, no matter where a medium-colored vehicle is located relative to both a dark-colored vehicle and a light-colored vehicle, it will not directly cause color cast.

In FIG. 1, the pre-process 10 on the production line 100 includes vehicles 20a to 20C, the main line 12 includes a vehicle 20e,
20f, bypass line 13 has vehicles 20g to 201,
Vehicle works 20j and 20 are flowing into the top coating process 14, respectively. Now, when the workpiece 20d is carried out from the pre-process 10, the identification information of the workpiece, that is, the color code (D), is detected by the identification information sensor 22, and the identification information is sent to the arithmetic processing unit 30 as an identification information signal 36. is output. The arithmetic processing unit 30 takes in identification information from its input section 48, and this identification information is output to the central processing section 60.

As the identification information sensor 22, in addition to such a device that optically and automatically reads the color code, a device that reads the work number and then imports the color code from the parent computer that controls the production line itself can also be used. It is possible.

The arithmetic processing circuit 30 receives identification information from its input section 48, and the central processing section 60 inputs this information to each reorganization line 12.
The reorganization line to which the vehicle work 20d is to be carried is determined and instructed by checking the designated color of each vehicle work 20d. That is, in the embodiment, the identification information or color code of the vehicle workpiece 20d is D, while the designated color of the main line 12 is "A, C" in the "designated color" section in the storage unit 62.
”, and the work designation color of bypass line 13 is r
It is set as A, CJ. Therefore, the reorganization line into which the work 20d is carried becomes the main line 12, and the central processing section 60 outputs this instruction to the line control panel 32 via the output section 58. The line control panel 32 is the central processing section 6
The line is controlled based on the signal from 0 and the vehicle 20d is carried into the main reorganization line 12.

The work carried out from the pre-process 10 in this manner is branched into one of the two reorganization lines 12 and 13, but in this embodiment, the main line 12 has light colored and The bypass line 13 is configured to carry medium-colored workpieces and dark-colored workpieces into the bypass line 13.

The vehicle workpieces carried out from the previous process 10 in this way are classified into dark color workpieces, light color workpieces, and medium color workpieces, and then the vehicle workpieces in these reorganization lines 12 and 13 are fed into the top coating process 14. The operation will be explained.

Each vehicle work carried into the reorganization line 12, 13 moves serially within these lines, and when it approaches the exit, it contacts a limit switch 24, 26 installed a predetermined distance before the exit.

Then, predetermined detection signals 38,40 are generated from these limit switches 24,26, and these signals are taken into the arithmetic processing unit 30 via its input section 50,52. The central processing unit 60 recognizes that the vehicle has arrived at the exit of the reorganization line 12.13 by this signal 38.40, and the vehicle workpieces 20f and 20i in the embodiment are
is registered in the "Color Code Arrangement" section in the storage unit 62 as a target vehicle to be submitted to the top coating process 14.

Further, when the vehicle workpieces input into the top coating process 14 in the order described below contact the limit switch 28 provided near the entrance of the process 14, the detection signal 42 is sent to the input section 54 of the arithmetic processing unit 30. The data is taken into the central processing unit 60 via the central processing unit 60.

The central processing unit 60 uses this signal to control the reorganization line 12 .
It is recognized that the vehicle work carried out from 13 has been input into the top coating process 14, and its color code is registered in the "color of entrance vehicle of top coating process 14" section in the storage unit 62.

In the above order, the vehicles located at the exit of the reorganization line 12.13, that is, the vehicle works 2Of and 20i that are input to the top coating process 14, and the latest vehicle work that is input to the top coating process 14, that is, process 14 This means that the vehicle workpiece located at the entrance of , 20j in the illustrated example, has been grasped by the central processing unit 60 .

The central processing unit 60 compares the color codes of these vehicle works with preset color cast conditions in the storage unit 62, and determines which of the target vehicles 20f and 20i to input.

That is, as is clear from the "color cast conditions" section in the storage unit 62 in FIG. Color code D or color code C
It is set that this is the case where the vehicle work of color code D continues immediately after. From this, it can be seen that color codes A and C represent dark colors, D represents light colors, and B represents intermediate colors.

On the other hand, the vehicle 20j located at the entrance of the top coating process 14
The color code of 20j is A, so if a vehicle with color code D is inserted immediately after this vehicle 20j, a color cast will occur. In other words, if the color code of the vehicle following the vehicle 20j is other than D, color cast will not occur and the vehicle can be entered into the top coating process 14 regardless of the type of color code.

Here, the color codes of the input target vehicles 2Of and 20i are BSA, and color cast will not occur even if any of them is input immediately after the last vehicle work 20j of the top coating process 14 whose color code is A. Therefore, in this case, it is okay to input either vehicle work 2Of or 20i to be input, but in such a case, the inventory numbers of vehicle works in both image formation lines 12 and 13 should be adjusted equally. In order to do so, we will start with the one with the largest number in stock.

Therefore, in the state shown in FIG. 1 where the vehicle workpiece 20d has not yet been delivered to the reorganization line, the number of vehicles in stock on the main line 12 is two, and the number of vehicles in stock on the bypass line 13 is three.
Since it is a stand, the vehicle work 20 is connected to the bypass line 13.
i will be input to step 14.

Furthermore, due to the relationship between the designated colors of the reorganization lines 12 and 13 in this embodiment, when a dark-colored vehicle is input from the bypass line, in order to input it from the main line 12 next, the leading vehicle work on the main line 12 must be The color must be neutral.

When the vehicle work to be input into the top coating process 14 is determined in this way, the central processing unit 60 outputs the input instruction signal to the line control board 32 via the output unit 58, and the line control board 32 receives this signal. Exit side traverser 1 based on
7 and inputs the vehicle 20i on the bypass line 13 side to the top coating process 14. When a new vehicle is input into the top coating process 14 in this way, the central processing unit 60 updates the arrangement of vehicle works in the reorganization line 12.13 and the color code of the last vehicle work in the top coating process 14. Then, it is registered again in the storage unit 62 at a predetermined address.

It is understood that the above-described operations are repeated each time the vehicle workpiece is carried in and out of each process and line, and that the vehicle is always carried into the top coating process 14 with a color code combination that does not cause color cast.

In this way, according to this embodiment, the color code arrangement of the vehicle workpieces to be carried into the topcoat painting process is adjusted without any manual work, and then the vehicle workpieces are carried into the topcoat painting process. To extremely efficiently and reliably prevent color cast on a vehicle body.

[Effects of the Invention] As explained above, according to the present invention, color cast in the top coating process of vehicle workpieces can be automatically prevented without manual intervention, so each work on the line is extremely efficient. Not only can the process proceed smoothly, but it also reliably prevents congestion of vehicles in the process due to forgetting to load items, so there is no need to stop the line.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the overall configuration of an automatic color cast prevention system according to the present invention, and FIG. 2 is a block diagram showing the internal configuration of the arithmetic processing unit in FIG. 1. 10... Pre-process 12.13... Reorganization line 14... Top coating process 22... Identification information sensor 30... Arithmetic processing unit 32... Line control panel 34... Condition input device 60... Central processing unit 62... Storage unit

Claims (1)

[Claims] (1) A system in which a plurality of work reorganization lines are provided between a vehicle body topcoat painting process and its preceding process to adjust the arrangement of vehicle works to prevent color cast on the vehicle body in the topcoat painting process, each of the above steps. and an identification information input means for detecting identification information of vehicle workpieces carried in and out of the line, and a reorganization line to which the vehicle workpieces carried out from the previous process are carried in based on predetermined conditions, and a top coating process from each formation line. an arithmetic processing device that instructs vehicle work to be input into the reorganization line, creates vehicle work arrangement data in each reorganization line based on the identification information, and writes and stores each of the identification information and conditions; and the arithmetic processing device a line control panel for controlling each process and line based on instructions from the reorganization line; a condition input device for setting conditions for the type of vehicle work to be input into each reorganization line, the vehicle work that causes color cast, and the like; An automatic color cast prevention system for a car body, which is characterized in that it prevents color cast on a car body during the top coating process.