JPH07232111A - Coating device for vehicle parts - Google Patents

Abstract

PURPOSE:To make it possible to set processing sequence adequately dealing with the condition of a production site by providing a coating device with a processing sequence calculating means with decreasing of the number of changing times of coating colors as a preferential condition and a processing sequence calculating means with decreasing of the number of exchanging times of jigs for coating as a preferential condition. CONSTITUTION:A job management disk 40 successively forms parts data having type information of bumpers corresponding to vehicle kinds and coating information of the coating colors, etc., in accordance with a coating start signal of vehicle bodies transferred from a host computer 50, stores the data into the prescribed area of a memory, reads out the parts data by every prescribed number of pieces, rearranges the data according to prescribed calculation rules to form the processing sequence data and transfers the data to a central control unit 28. The job management disk 40 permits selection of an ordinary mode to rearrange the parts data with the decreasing of the number of the changing times of the coating colors as the preferential condition and a manpower saving mode to rearrange the parts data with the decreasing of the number of the exchanging times of the coating jigs as the preferential condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating device for vehicle parts,
Specifically, the present invention relates to a coating device for vehicle parts having different sizes and coating colors for each vehicle type.

[0002]

2. Description of the Related Art A vehicle manufacturing plant is completed by sequentially assembling various interior and exterior parts such as seats and bumpers after a vehicle body that has been sequentially supplied to a vehicle production line is painted with a predetermined paint color. It can be finished as a car.

On the other hand, in a vehicle manufacturing plant of this type, there is a case in which, for example, a coating facility dedicated to bumpers is provided on the factory premises to perform the bumper painting work in parallel with the vehicle body painting work. This painting facility is provided with work stations for performing, for example, masking of work, primer painting, topcoat painting, clear painting and drying, and the works are sequentially supplied to these work stations.

In such a case, there is a painting facility of this type in which an automatic painting machine using a robot is installed at a painting work station in order to rationalize the bumper painting work. In this case, the paint is automatically supplied and stopped in accordance with the preset teaching data corresponding to the shape of the bumper of different size for each vehicle type. The coating jig is mounted on the pallets that are circulated through the coating station, and the work is loaded into these pallets with the work loaded on the pallets through the coating jig. Therefore, when the work is unloaded from the coating station, the paint is evenly attached to the surface of the work.

By the way, generally, in a vehicle production line, vehicles having different vehicle types and different paint colors are mixed and produced. Therefore, even in a bumper painting facility, the size and Bumpers with different paint colors must be mixed and painted.
In that case, if the bumpers are painted in a manner consistent with the production order of the vehicles, inconvenience will occur, for example, the paint color must be changed frequently. Therefore, in the past, focusing on the fact that the bumper painting time is relatively longer than the vehicle production time, the bumper work is divided into predetermined groups based on the vehicle production information, and Was redistributed so that the number of changes in paint color was reduced, and the bumper painting work was performed in the painting order according to the result of the distribution.

[0006]

However, in the prior art, for example, the bumper coating order is manually determined based on the vehicle production information input to the host computer of the manufacturing plant.
There were the following problems.

In other words, since the coating order of the bumpers is manually determined, the coating order does not always reflect the situation of the manufacturing site. For example, when the personnel are not enough, the coating jig is replaced. Is frequently performed, which causes an excessive burden on the jig replacement worker.

According to the present invention, vehicle parts having different sizes and different paint colors for each vehicle type are grouped into a predetermined number based on vehicle production information to generate processing order information, which is circulated through a coating station and conveyed. The coating jigs for vehicle parts are mounted on multiple pallets according to the processing order of each group, and the vehicle parts are loaded on these pallets through the coating jig according to the processing order of each group. The present invention addresses the above-mentioned problems in the case of being carried into the coating station, and an object thereof is to be able to set a processing sequence appropriately corresponding to the situation of the production site.

[0009]

That is, the invention according to claim 1 of the present application (hereinafter, referred to as the first invention) is such that a vehicle part having a different size and a different paint color for each vehicle type is predetermined based on vehicle production information. The processing order information is generated by dividing the number of pieces into groups, and a plurality of pallets that are circulated and conveyed through the coating station are equipped with a coating jig for vehicle parts in accordance with the processing order of each group, and these pallets are also installed. In the device for coating vehicle parts to be supplied to the production line of the vehicle, in which the vehicle parts are loaded through the coating jig in accordance with the processing order of each group and carried into the coating station, First processing order calculation means for calculating the processing order of the groups with a priority condition that the number of changes of the paint color is small, and the processing order of each group Based on the operation signal from the second processing order operation means for performing an operation based on the arrangement sequence of the previous group, and the priority condition being that the number of times of exchanging the coating jig mounted on the pallet is reduced. And a switching means for selectively operating the first and second processing sequence calculation means.

The invention according to claim 2 of the present application (hereinafter referred to as the second invention) uses the first processing order calculating means in the first invention to set the processing order for each group so that the leading paint color is It is characterized in that it is configured so as to determine, as a priority condition, that it matches the final color of the previous group.

[0011]

According to the above construction, the following operation can be obtained.

That is, in both the first and second inventions, when the operating means is operated to select the first processing sequence computing means, the group of vehicle parts grouped based on the production information of the vehicle becomes Since the number of times of changing the paint color is distributed in the order of decreasing as much as possible, unnecessary color changes can be appropriately avoided.

On the other hand, if the operating means is operated to switch to the second processing order calculating means, the number of times of exchanging the coating jig for the group of vehicle parts can be minimized based on the arrangement order of the previous group. Therefore, it is possible to prevent the excessive burden on the jig replacement worker when the number of workers is insufficient. In this way, the processing order of vehicle parts is appropriately set according to the situation of the production site.

In particular, according to the second aspect of the invention, when the first processing order calculating means is selected, the processing order of each group is such that the paint color at the beginning matches the last color of the previous group as much as possible. Therefore, unnecessary color change can be avoided more appropriately.

[0015]

EXAMPLES Examples of the present invention will be described below.

First, an outline of a bumper manufacturing plant according to the embodiment will be described with reference to FIGS. 1 and 2.

As shown in FIG. 1, one of the bumper manufacturing plants is
The floor portion is used as a pretreatment facility, and a bumper molded product (hereinafter, referred to as a work) molded by a plastic molding machine (not shown) is conveyed by a conveyor 2 provided by circulating the cleaning device 1 bent into an L shape. The work is cleaned in the process of being cleaned, and the cleaned work is accumulated in a predetermined accumulation area 3. Further, a work transfer device 4 which is tact-driven by an appropriate drive means is interposed between the pretreatment facility and a coating facility provided on the third floor, for example, and near the accumulation area 3. Is the transfer device 4
Hanging display panel 2 that displays the part number of the workpiece to be set
1 is installed.

On the other hand, in the coating facility provided on the third floor, as shown in FIG. 2, a masking area 5 for masking the work, a primer coating booth 6 for performing primer coating on the masked work, Topcoating booth 7 for topcoating work after primer coating
And a clear coating booth 8 for performing clear coating on the work after the top coating, and a drying oven 9 for drying the work after the clear coating, and a floor conveyor 10 driven by appropriate means, the masking It is installed so as to circulate in the area 5, the coating booths 6 to 8 and the drying furnace 9.

A transfer pallet 11 as shown in FIG. 3 is connected to the floor conveyor 10.

The transfer pallet 11 has a base plate 12 which can be engaged with and disengaged from the floor conveyor 10, a support column 13 standing on the base plate 12, and a jig receiving plate 14 fixed to the upper end of the support column 13. With
The work W transferred by the work transfer device 4 is loaded on the coating jig 15 detachably attached to the jig receiving plate 14. And
As shown in FIG.
As shown in FIG.
Are provided, and the positioning pins 16 and 16 are provided with engaging holes 17 formed at predetermined positions of the coating jig 15.
By fitting 17 in, the coating jig 15 or the work W is held at a predetermined position with respect to the transport pallet 11.

In this embodiment, for example, 90 transfer pallets 11 are spaced at appropriate intervals on the floor conveyor 10.
And is adapted to be tact-transported at a predetermined pitch as the floor conveyor 10 is driven by a control signal from the conveyor control panel 22. In that case, the conveyor control panel 22 includes the floor conveyor 10
The same number of register portions corresponding to the 90 stop positions of the transfer pallet 11 along the transfer route of No. 1 are provided, and the pallet numbers 1 to 90 assigned to each transfer pallet 11 correspond to those of the floor conveyor 10. The register unit is sequentially shifted in synchronization with the carrying operation.

As shown in FIG. 2, the floor conveyor 1
A work supply station 18 is provided on the upstream side of the masking area 5 in the transport path of 0, and the works transferred by the work transfer device 4 merge with the work supply station 18, and are appropriately connected. The transfer device transfers the work from the work transfer device 4 to the transfer pallet 11. In this case, the work transfer device 4 is tact-driven in synchronization with the transfer operation of the floor conveyor 10. Therefore, the number of stages until the work set in the work transfer device 4 merges with the work supply station 18 is temporarily 4
When it is set to 0, the work is transferred to the transfer pallet 11 40 stages before.

Further, on the side of the transfer path of the floor conveyor 10, the coating jig 1 which is located upstream of the work supply station 18 and is mounted on the transfer pallet 11 is provided.
A jig number display panel 23 for displaying the number 5 is installed.

Further, the floor conveyor 10 has the first and second conveyors 10a, 1a on the starting end side of the masking area 5.
In addition to being split into two systems of 0b, the first of these,
The second conveyors 10a and 10b are merged into one again on the terminal side of the masking area 5, and reach the primer coating booth 6 on the downstream side. In that case, the transport pallet 11 is configured to be alternately sorted to the first and second conveyors 10a and 10b on the starting end side of the masking area 5, and then to be assembled again in the sorted order.
In this embodiment, a plurality of masking display panels 24 ... 24 for displaying masking information are provided in the masking area 5.

On the other hand, the primer, top coat and clear coating booths 6 to 8 are respectively equipped with robots (not shown) for the first, second and third automatic coating machines 31, 32 ,.
33 are installed. These automatic coating machines 31, 3
2 and 33 are the first, second and third coating control panels 2 respectively
By the control signals from 5, 26 and 27, the supply and stop of the coating material are automatically controlled according to the preset teaching data corresponding to the shape of the work. Then, in the second automatic coating machine 32 installed in the top coating booth 7, the coating color is changed according to the color change command from the second coating control board 26.

Further, the coating facility is provided with a work management console 40 for managing the coating work and a central control unit 28 for comprehensively controlling the coating work.

These work management console 40 and central control unit 2
As shown in FIG. 5, the work management console 40 is capable of transmitting and receiving data to and from the host computer 50 that manages vehicle production.

An input device 41 such as a keyboard and a display device 42 for displaying various information are connected to the work management console 40. Then, the work management console 40 sequentially supplies, based on the vehicle body painting start signal transferred from the host computer 50, part data having bumper model information corresponding to the vehicle type of the vehicle and painting information such as painting color. The data is generated and stored in a predetermined area of the memory, and at the same time, a predetermined number (for example, 90) of these component data are read out and rearranged according to a predetermined calculation rule to generate processing order data, which is then transferred to the central controller 28. It is supposed to do.

On the other hand, the central control unit 28 takes in the current position data of the transfer pallet 11 conveyed by the floor conveyor 10 from the conveyor control panel 22 via the loop network 29 capable of transmission and reception, and also the current position data and the central position. Based on the processing sequence data transferred from the control device 28, the coating control data for the work W on the transfer pallet is generated, and is transmitted to the first to third coating control boards 25, 26, 27 via the loop network 29. It is supposed to be transferred. Further, the central control device 28, based on the current position data of the transfer pallet 11 and the processing order data, sets the part number of the work W to be set in the work transfer device 4 for the hanging display panel 21. On the jig number display panel 23, the jig numbers of the coating jigs 15 mounted on the transfer pallet 11 of the floor conveyor 10 are displayed, and masking information corresponding to the vehicle type is provided in the masking area 5. Masking display board 24
... is displayed on 24.

That is, assuming that the component data included in a certain processing sequence data indicates that the vehicle type is "A" and the paint color is "white", the central control unit 28 outputs from the conveyor control panel 22. The part data is shifted based on the tact signal, and the part number of the work corresponding to the vehicle type is displayed on the hanging display panel 21 at a timing 40 stages before the work supply station 18 on the conveyance path of the floor conveyor 10. In addition to displaying, the transport pallet 11
The component data is further shifted with the movement of, and the pallet number and the jig number of the transfer pallet 11 are displayed on the jig number display panel 23 at a timing of, for example, 10 stages before the work supply station 18. Therefore,
The hanging worker sets the work of the part number displayed on the hanging display panel 21 in the work transfer device 4, and the jig replacement worker is displayed on the jig number display panel 23. When the coating jig 15 with the specified jig number is taken out from the jig storage space 19 and mounted on the transfer pallet 11 with the specified number, the workpieces set in the workpiece transfer device 4 join the workpiece supply station 18. At times, the work is transferred to the transfer pallet 11 on which the coating jig 15 suitable for the size of the work is mounted. That is, the work corresponding to the "car A" specified by the component data included in the processing order data is the coating jig 1 that is suitable for the size of the work.
Therefore, it is loaded on the transport pallet 11 via 5.

When the work is loaded on the transport pallet 11, the central controller 28 shifts the component data in association with the pallet number indicating the transport pallet 11. Therefore, at the timing when the transport pallet 11 corresponding to the pallet number moves to the masking area 5,
The vehicle type number indicating "A car" and the paint color number indicating "white" are displayed on the masking display panels 24 ... 24.

When the transport pallet 11 further moves and reaches the primer coating booth 6,
The painting control data corresponding to the pallet number of the transfer pallet 11 is transferred to the first painting control board 25, and the primer painting is performed by the operation of the first automatic painting machine 31.
At the timing when the transfer pallet 11 reaches the top coating booth 7, the coating control data is transferred to the second coating control panel 2
6, and the second automatic coating machine 32 is operated to perform the top coating. In that case, in the second automatic coating machine 32, the coating material corresponding to the coating color number is automatically set. Therefore, when the work is unloaded from the top coating booth 7 as the transfer pallet 11 moves, the work is painted "white" in correspondence with the component data linked to the pallet number. Further, when the transfer pallet 11 reaches the clear coating booth 8, the coating control data is set to the third value.
It is transferred to the painting control panel 27, and the clear painting is performed by the operation of the third automatic painting machine 33. Then, the work carried out from the clear coating booth 8 is dried in the process of passing through the drying furnace 9 as the transfer pallet 11 moves, and the dried work is carried out from the drying furnace 9 and then transferred to the transfer pallet 11. It is removed and collected from the car, and accessories such as lamps are attached and finally finished as a bumper.

Here, as described above, the work management console 40
In, the part data of a predetermined number of bumpers corresponding to the painting start signal of the vehicle body is rearranged to generate the processing sequence data of the painting work.
In the present embodiment, the above-mentioned component data is rearranged under the priority condition that the number of times of changing the coating color is small, and the rearrangement of the component data is like the priority condition that the number of times of changing the coating jig 15 is reduced. The power saving mode can be selected. Next, the process sequence setting process of the painting work performed by the work management console 40 will be described with reference to the flowcharts of FIGS. 6 to 8.

That is, the work management console 40 determines the mode in step S1 of the main routine shown in the flowchart of FIG. 6, and when it is determined that the mode is the normal mode, the work management console 40 executes a predetermined normal array operation process in step S2. After rearranging the data, the process proceeds to step S3 to transfer all the component data to the central controller 28, and the above step S3.
When it is determined that the operation mode is the power saving mode in step 1, the process moves to step S4 to rearrange the part data by executing a predetermined power saving array calculation process, and then proceeds to step S3 to save all the part data in the central controller 28. Transfer to. Here, the mode determination is performed based on, for example, an operation signal from the input device 41, and the display device 4
The mode selected by the input device 41 is selected from the selection menu for selecting the normal mode and the labor-saving mode displayed in 2.

Returning to the main routine of FIG. 6, the work management console 40 executes step S5 subsequent to step S3, and after moving all the component data to the execution file,
In step S6, it is determined whether 90 tacts have elapsed based on the tact signal transferred via the central controller 28, and when 90 tacts have elapsed, the process returns to step S1 and the mode determination is performed again.

In this case, the normal array operation processing in step S2 is specifically performed as follows according to the subroutine shown in the flowchart of FIG.

That is, the work management console 40 executes step S
In step 21, 90 pieces of component data are read into the predetermined first work area, and in step S22, the processing sequence data calculated previously is copied in the reference area.

Next, the work management console 40 is step S23.
Is executed, it is determined whether or not the component data having the paint color code that matches the end paint color of the previous processing order data stored in the reference area exists in the first work area.
When it is determined to be S, the corresponding part data is moved to the second work area in step S24, and then step S27 is executed to display the first pointer i indicating the address of the part data in the reference area and the part data in the second work area. The second pointer j indicating the address is incremented.

On the other hand, the work management console 40 uses the above step S.
When NO is determined in 22, the process proceeds to step S25, and 1 of the previous processing sequence data stored in the reference area is stored.
It is determined whether or not the component data having the model code corresponding to the th vehicle type is present in the first work area, and if YES is determined, the component data corresponding to the second work area is also determined in step S24 in this case. After moving to step S27, step S27 is executed.

In addition, the work management console 40 uses the above step S2.
If NO is determined in step 5, the process proceeds to step S26, the top part data of the first work area is moved to the second work area, and then step S27 is executed.

After executing step S27, the work management console 40 proceeds to step S28 to determine whether or not the value of the second pointer j has reached 90, and when NO is determined, executes step S29. Then, it is determined whether or not the component data having the paint color code that matches the paint color of the j-1th component data in the second work area exists in the first work area. In other words, it is determined whether or not there is one that satisfies the condition that the same color continues. If the work management console 40 determines YES, it moves the relevant part data to the second work area in step S30, and then moves to step S30.
Returning to 27, the first and second pointers i and j are incremented.

In addition, the work management console 40 uses the above step S.
When NO is determined in 29, the process proceeds to step S31 and i of the previous processing order data stored in the reference area is read.
It is determined whether or not the component data having the model code corresponding to the th vehicle type exists in the first work area, and if YES is determined, the relevant component data is moved to the second work area in step S30, When it is determined NO in step S31, the process moves to step S32 to move the first part data of the first work area to the second work area, and the process returns to step S27. And step S
At 28, when the value of the second pointer j reaches 90, the process returns to the main routine.

On the other hand, the labor-saving array calculation process in step S4 is specifically performed as follows according to the subroutine shown in the flowchart of FIG.

That is, the work management console 40 executes step S
At 41, 90 pieces of component data are read into the first work area, and at the same time, the processing sequence data calculated last time is copied to the reference area at step S42.

Next, the work management console 40 makes a step S43.
Is executed to determine whether or not the component data having the model code corresponding to the first vehicle type of the previous processing order data stored in the reference area exists in the first work area, and YES
If it is determined that the relevant part data is moved to the second work area in step S44, step S47 is executed to increment the first and second pointers i and j, respectively.

On the other hand, the work management console 40 uses the above step S.
When NO is determined in 42, the process proceeds to step S45, and it is determined whether or not the component data having the paint color code that matches the trailing paint color of the previous processing order data stored in the reference area exists in the first work area. If YES is determined and YES is determined, the above step S44 is performed in this case as well.
After moving the corresponding part data to the second work area with,
Step S47 is executed.

In addition, the work management console 40 uses the above step S4.
If NO is determined in 5, the process proceeds to step S46 to move the first part data of the first work area to the second work area, and then step S47 is executed.

After executing step S47, the work management console 40 proceeds to step S48 to determine whether or not the value of the second pointer j has reached 90, and when NO is determined, executes step S49. Then, it is determined whether or not the component data having the model code corresponding to the i-th vehicle type of the previous processing order data stored in the reference area exists in the first work area. If the work management console 40 determines YES, it moves the relevant part data to the second work area in step S50, and then returns to step S47 to execute the first,
The second pointer i, j is incremented.

In addition, the work management console 40 uses the above step S.
When NO is determined in 49, the process proceeds to step S51 to check whether or not the component data having the paint color code that matches the paint color of the j-1th component data in the second work area exists in the first work area. If YES is determined, the corresponding component data is moved to the second work area in step S50, while if NO is determined in the step S51, the process moves to step S52 and the first component in the first work area is moved. The data is moved to the second work area and the process returns to step S47. Then, when the value of the second pointer j reaches 90 in step S48, the process returns to the main routine.

Therefore, when the normal mode is selected, the data 9 loaded in the first work area of the work management console 40 is read.
The first priority condition is that 0 pieces of component data have the same paint color consecutively, and component data having the same model code is arranged at the same order position as the model code of the component data in the processing sequence data calculated last time. This is rearranged as the second priority condition and then transferred as the processing order data to the central control unit 28. Therefore, the component data should be distributed in the order in which the number of times of changing the paint color is as small as possible. As a result, unnecessary color changes will be appropriately avoided. In particular, in this embodiment, since the leading paint color is set to match the last color of the previous group as much as possible, unnecessary color change can be avoided more appropriately. .

On the other hand, when the labor saving mode is selected, the 90 pieces of component data read in the first work area of the work management console 40 are placed at the same order position as the model code of the part data in the previously calculated processing order data. Arrangement of component data having the same model code is set as the first priority condition, and the fact that the same paint color continues is rearranged as the second priority condition, and then transferred to the central controller 28 as processing order data. Therefore, the above-mentioned part data is distributed in the order in which the number of times of exchanging the coating jig 15 is reduced as much as possible, and when the personnel are not available, the jig exchanging worker is required. Excessive burden is also avoided.

Of course, this embodiment can be applied to vehicle parts other than the bumper assembled to the vehicle.

[0053]

As described above, according to the present invention, vehicle parts having different sizes and coating colors for each vehicle type are divided into groups of a predetermined number based on vehicle production information to generate processing order information, and painting is performed. A plurality of pallets that are circulated through the station are mounted with a coating jig for vehicle parts in accordance with the processing order for each group, and these pallets are used for each group through the coating jig. In the case where the vehicle parts are loaded in accordance with the processing order and carried into the coating station, when the operation means is operated to select the first processing order operation means, the parts are grouped based on the vehicle production information. Since the group of vehicle parts will be distributed in the order in which the number of paint color changes will be as small as possible, unnecessary color changes will be appropriately avoided. It becomes Rukoto.

If the operating means is operated to switch to the second processing order calculating means, the number of times of exchanging the coating jig for the group of vehicle parts can be minimized based on the arrangement order of the previous group. Since it will be distributed in the following order, it is possible to avoid giving an excessive burden to the jig replacement worker when there is not enough personnel.

In particular, according to the second aspect of the present invention, when the first processing order calculating means is selected, the processing order for each group is such that the paint color at the beginning matches the last color of the previous group as much as possible. Therefore, unnecessary color change can be avoided more appropriately.

[Brief description of drawings]

FIG. 1 is a layout diagram showing a system configuration of a work pretreatment facility in a bumper manufacturing factory.

FIG. 2 is a layout diagram showing a system configuration of a work painting facility in the bumper manufacturing factory.

FIG. 3 is a perspective view showing a state in which a coating jig is mounted on a transfer pallet.

FIG. 4 is an enlarged cross-sectional view of a main part showing a configuration of a positioning pin of a transport pallet and its periphery.

FIG. 5 is a control system diagram showing a control system of the coating facility.

FIG. 6 is a flowchart showing a main routine of a work processing order setting process according to the embodiment.

7 is a flowchart showing a subroutine of normal array operation processing in the main routine of FIG.

FIG. 8 is a flowchart showing a subroutine for labor-saving array calculation processing in the main routine of FIG.

[Explanation of symbols]

 6 Primer coating booth 7 Top coating booth 8 Clear coating booth 11 Transfer pallet 15 Coating jig 40 Work management table 41 Input device W work

Claims (2)

[Claims] 1. A plurality of vehicle parts, which are different in size and paint color for each vehicle type, are grouped by a predetermined number based on vehicle production information to generate processing order information, and are transported by circulating through a coating station. The pallets are equipped with coating jigs for vehicle parts according to the processing order for each group, and the pallets are loaded with the vehicle parts according to the processing order for each group through the coating jigs. A coating device for vehicle parts to be supplied to a production line of a vehicle, which is adapted to be carried into the coating station, wherein the processing order of each group is calculated on the priority condition that the number of changes of the coating color is small. 1 The processing order calculation means and the processing order of each of the groups are given as a priority condition that the number of times of changing the coating jig mounted on the pallet is reduced. And a second processing order calculation means for performing a calculation based on the arrangement order of the previous group, and a switching means for selectively activating the first and second processing order calculation means based on an operation signal from the operation means. A coating device for vehicle parts, which is provided. 2. The first processing order calculation means is configured to determine the processing order for each group as a priority condition that the paint color at the head of the group matches the final color of the previous group. The coating device for vehicle parts according to claim 1.