JPH11300268A - Method for forming protective film on automotive coating face and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for forming a protective film on an automotive coated face by which it is possible to correctly coat a strippable paint which forms the protective film within a protection area range and at the same time, efficiently form the protective film of uniform thickness, and also provide a device for forming the protective film. SOLUTION: An automobile 12 is conveyed in an arrow A direction with the help of a conveyance mechanism 16 to be actuated for conveyance. Nozzle devices 50a-50d shuttle back and forth by a reciprocating motion mechanism 32 of a coating device 20, and an appropriate amount of strippable paint for the size of coating areas 106, 108, 110 is applied in a meandering manner to the coating areas 106, 108, 110 by the nozzle devices 50a-50d. The strippable paint applied to the coating areas 106, 108, 110 is spread by the roller 92 of a roller device 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for forming a protective film of a strippable paint on a painted surface of an automobile to temporarily protect the painted surface.

[0002]

2. Description of the Related Art Conventionally, prior to shipment of a completed automobile, for example, as disclosed in Japanese Patent Application Laid-Open No. Hei 8-224503, a water-soluble paint of a release type from a number of pores is combed on a painted surface. The coating is applied to the coating surface by spraying to form a stripe-shaped coating portion, and the stripe-shaped coating portions are connected to each other under the fluidity of the coating to form a substantially flat protective film. Methods and devices are known.

[0003]

However, in the above-described conventional method and apparatus for forming a protective film on a painted surface of an automobile, if the viscosity of the paint is high, it is difficult to form a uniform protective film thickness. If the thickness of the formed protective film is not uniform, there is a problem that the film is easily torn or peeled. On the other hand, if the viscosity of the paint is low, there is a concern that the paint may flow outside the area where the protective film is formed, and a masking process, inspection and correction processes are required to prevent this, There was a problem that costs would rise.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a protective film having a uniform thickness, in which a strippable paint for forming a protective film can be accurately applied to an area to be protected. It is an object of the present invention to provide a method and an apparatus for forming a protective film on a painted surface of an automobile, which can efficiently form a coating.

[0005]

In order to achieve the above object, the present invention provides a method for forming a protective film of a strippable paint on a painted surface of a vehicle to temporarily protect the painted surface. Wherein, while relatively displacing the vehicle and a nozzle device having a plurality of pores formed in the width direction of the vehicle, the strippable paint is protected from the pores of the nozzle device on the painted surface. Controlling the flow rate according to the size of the range to apply to the painted surface, while relatively displacing the vehicle and the roller,
A step of spreading the applied strippable paint over the entire area of the painted surface to be protected by the roller, and a step of drying the strippable paint applied to the painted surface to form a protective film, It is characterized by having.

According to the present invention, an appropriate amount of the strippable paint is applied to a painted surface of an automobile, and the strippable paint is spread by a roller, so that the strippable paint is accurately applied to an area to be protected, and A uniform thickness can be obtained.

In this case, in the step of applying the strippable paint to the painted surface of the vehicle, the size of the area to be protected on the painted surface and the relative displacement speed of the vehicle and the nozzle device are used to determine the value. By controlling the amount of the strippable paint applied to the painted surface of the car,
An appropriate amount of strippable paint can be applied to the painted surface of an automobile, which is preferable.

In this case, in the step of applying the strippable paint to the painted surface of the vehicle, the nozzle device is relatively reciprocated in a width direction of the vehicle, and the strippable paint is applied to the painted surface. When applied in a meandering shape, the strippable paint can be spread evenly over the painted surface, which is preferable.

Further, in this case, in the step of spreading the strippable paint over the entire area of the painted surface to be protected, the compressed air ejection mechanism is displaced relative to the automobile in place of the rollers. By spraying compressed air from the compressed air ejection mechanism onto the applied strippable paint, the strippable paint may be spread over the entire area of the coating surface to be protected.

Further, in this case, in the step of applying the strippable paint to a painted surface of the automobile, the strippable paint is applied within a range smaller than a protected area of the painted surface. This is preferred because there is no concern that the strippable paint will protrude beyond the protected area of the painted surface when spreading.

Further, the present invention is an apparatus for forming a protective film of strippable paint on a painted surface of a vehicle to temporarily protect the painted surface of the vehicle. A nozzle device that discharges to a surface, a displacement mechanism that relatively displaces the vehicle and the nozzle device, an on / off valve that is connected to the nozzle device and controls supply or stop of the strippable paint, A flow meter connected to a nozzle device for measuring the flow rate of the strippable paint, and a control unit for controlling the on / off valve, wherein the control unit has a size of a protected area of the painted surface;
The amount of the strippable paint applied to the area to be protected of the painted surface is controlled based on a relative displacement speed between the vehicle and the nozzle device.

According to the present invention, an appropriate amount of the strippable paint can be accurately applied to the area to be protected of the painted surface of the automobile, and the film thickness of the strippable paint can be made uniform. .

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a method for forming a protective film on a painted surface of an automobile according to the present invention will be described in detail with reference to the accompanying drawings. explain.

In FIG. 1, reference numeral 10 denotes a protective film forming apparatus according to a first embodiment of the present invention. The protective film forming apparatus 10 is provided on a production line of an automobile 12 as a work, and includes a transport mechanism 16 that transports a transport table 15 on which the automobile 12 is mounted. The protective film forming apparatus 10 includes two work stations. Each work station includes a coating device 20 and a roller device 21 on one side of the transport mechanism 16. As shown in FIG. 2, the coating device 20 has a base 22, and a column 24 is erected on the base 22. A ball screw 28 that is rotated by a rotation drive source 26 is disposed inside the support 24, and a ball nut 29 is engaged with the ball screw 28. A displacement member 30 is fixed to the ball nut 29, and when the ball screw 28 rotates, the displacement member 30 is displaced in the arrow B or C direction. Further, a cylinder (not shown) for displacing the displacement member 30 may be provided on the base 22 of the coating device 20.

The displacement member 30 is provided with a reciprocating mechanism 32. The reciprocating mechanism 32 has a motor 34 provided on the displacement member 30, and a first arm member 36
Is fixed at one end. One end of a second arm member 38 is rotatably supported by the other end of the first arm member 36, and the other end of the second arm member 38 is supported by a plate member 40. A plurality of guide blocks 42 are fixed to the plate member 40, and the guide blocks 42 are provided on the rail members 4 provided on the displacement member 30.
4 is slidably engaged. One end of a long frame 46 is fixed to the plate-shaped member 40, and nozzle devices 50 a to 50 d are provided at the other end of the frame 46.

The nozzle devices 50a to 50d are shown in FIGS.
As shown in the figure, the body 52 is provided, and a joint 54 is provided above the body 52. A passage 56 communicating with the joint 54 is formed in the body 52, and the passage 56 is branched into a plurality of passages and communicates with a passage 58 extending inside the body 52 in a horizontal direction. In the lower part of the body 52, a large number of narrow grooves 60 communicating with the passage 58 and having an arc-shaped cross section are formed in parallel with each other (see FIG. 5). A cover member 62 that covers the narrow groove 60 is fixed to the body 52, and the narrow groove 60 is formed as a fine hole.

Electromagnetic valves 68a to 68d are connected to joints 54 provided in the respective nozzle devices 50a to 50d via flow meters 66a to 66d, and a plurality of electromagnetic valves 68a to 68d are connected.
68d is connected to one solenoid valve 70. The solenoid valve 70 is connected via a pump 72 to a tank 74 in which the strippable paint is stored. The electromagnetic valves 68a-
68d, the solenoid valve 70, and the flow meters 66a to 66d are electrically connected to the control unit 76. Control unit 7
6 stores information such as the amount of the strippable paint applied to the hood 100, the roof 102, and the trunk 104, which are the painted surfaces of the automobile 12, the transport speed of the automobile 12 by the transport mechanism 16, and the like. The solenoid valves 68a to 68d and the solenoid valve 70 are controlled. If the control unit 76 is configured to store information on the amount of the strippable paint applied to the hood 100, the roof 102, and the trunk 104 for each model of the automobile 12, the Even if the model is changed, it is not necessary to change the control unit 76 each time.

As shown in FIG. 6, the roller device 21 has a base 80, and a support 82 is erected on the base 80. A ball screw 86 that is rotated by a rotation drive source 84 is provided inside the column 82, and a ball nut 87 is engaged with the ball screw 86. The ball nut 87 has a displacement member 88.
Is fixed, and when the ball screw 86 rotates, the displacement member 88
Is displaced in the arrow B or C direction. One end of a long frame 90 is fixed to the displacement member 88, and a long roller 92 made of an elastic porous material such as sponge is rotatably provided on the other end of the frame 90.

Protective film forming apparatus 1 according to the first embodiment
0 is basically configured as described above,
Next, the operation will be described in relation to the protective film forming method according to the first embodiment.

As shown in FIG. 1, an automobile 12 as a work is sequentially conveyed at a predetermined moving speed in the direction of arrow A under the conveying action of a conveying mechanism 16.

Here, portions of the painted surface of the automobile 12 on which the protective film is formed are the hood 100, the roof 102, and the trunk 104. On the surface of the hood 100, the roof 102 and the trunk 104,
First, the strippable paint is applied by the application device 20. After forming a protective film, this strippable paint has excellent impact resistance, abrasion resistance, water resistance,
Desirably, it has oil resistance and can be easily peeled off as a single film when peeled off. For example, a vinyl chloride paint, vinyl emulsion paint, aqueous emulsion paint, or synthetic latex is used. Is done.

The step of applying the strippable paint will be described in detail.
6, the ball screw 28 rotates (see FIG. 2),
The displacement member 30 is displaced in the direction of arrow B together with the ball nut 29. When the nozzle devices 50a to 50d are displaced to a position slightly higher than the height of the hood 100 of the automobile 12, the nozzle devices 50a to 50d are stopped so as to be at a position separated from the surface of the hood 100 by a predetermined distance.

Next, when the motor 34 of the reciprocating mechanism 32 is energized, the first arm member 36 and the second arm member 38 operate as cranks, and the plate member 40 reciprocates in the direction of arrow D. Therefore, the nozzle devices 50a to 50d reciprocate in the arrow D direction.

The bonnet 1 is moved under the action of the transfer mechanism 16.
When one end of the application range 106 slightly smaller than the area to be protected at 00 is transported directly below the nozzle devices 50a to 50d (see FIG. 1), the control unit 76 turns on the solenoid valve 70 and the solenoid valves 68a to 68d. Then, the strippable paint is supplied from the tank 74 to the nozzle devices 50a to 50d (see FIG. 3). For this reason, the strippable paint is discharged from the joints 54 through the passages 56 and 58 from the numerous narrow grooves 60 and is applied in the application area 106.

At this time, since the automobile 12 is conveyed in the direction of arrow A and the nozzle devices 50a to 50d repeatedly reciprocate in the direction of arrow D, the strippable paint is applied in a meandering manner within the application range 106 of the bonnet 100. Is done.

Here, the application range 10 of the bonnet 100
The flow rate of the strippable paint applied to 6 is detected by flow meters 66a to 66d, and a signal corresponding to this flow rate is input to the control unit 76. Control unit 76
Is determined based on the size of the application range 106 of the hood 100, the flow rate of the strippable paint detected by the flow meters 66a to 66d, the transport speed of the automobile 12, and the like.
At 06, it is determined whether or not an appropriate amount of the strippable paint has been applied, and after the appropriate amount of the strippable paint has been applied, the electromagnetic valves 68a to 68d and the electromagnetic valve 70 are turned off to stop supplying the strippable paint. For this reason, the coating range 106 from the narrow groove 60 of the nozzle devices 50a to 50d is set.
The application of the strippable paint to the coating is stopped.

Next, the rotary drive source 26 of the coating device 20 is urged to rotate the ball screw 28 (see FIG. 2), and the nozzle devices 50a to 50d together with the displacement member 30
Is displaced to a position slightly higher than the height of the roof 102.
The application range 1 of the roof 102 under the transport action of the transport mechanism 16
When one end of the cartridge 08 is conveyed immediately below the nozzle devices 50a to 50d (see FIG. 1), the control unit 76 turns on the solenoid valve 70 and the solenoid valves 68b and 68c. For this reason, the strippable paint is applied to the nozzle devices 50b, 50b.
The liquid is discharged from the narrow groove 60 c and is applied to the application area 108. In this case, since the coating range 108 of the roof 102 is narrower than the coating range 106 of the bonnet 100, when the strippable paint is applied using all the nozzle devices 50a to 50d, the strippable paint is applied outside the coating range 108. It will protrude. Therefore, the strippable paint is applied to the application area 108 using only the nozzle devices 50b and 50c located inside. At this time, since the reciprocating mechanism 32 is biased,
The nozzle devices 50b and 50c repeat reciprocating movements in the direction of arrow D, and the strippable paint is applied in a meandering manner within the application area 108.

The flow rates of the strippable paint applied to the application area 108 of the roof 102 are measured by flow meters 66b and 66.
c is input to the control unit 76, and the control unit 76 determines whether an appropriate amount of the strippable paint according to the size of the application range 108 has been applied,
When the proper amount of the strippable paint is applied, the electromagnetic valves 68b, 68c and the electromagnetic valve 70 are turned off to stop the supply of the strippable paint. Therefore, the application of the strippable paint from the narrow groove 60 of the nozzle devices 50b and 50c to the application range 106 is stopped.

Next, the strippable paint is applied to the application area 110 of the trunk 104 in the same manner. Also in this case, the strippable paint is applied to the application area 110 in a meandering manner. Further, the control unit 76 determines whether or not an appropriate amount of the strippable paint has been applied according to the application range 110. When the appropriate amount of the strippable paint has been applied, the application range is determined from the narrow groove 60 of the nozzle devices 50b and 50c. The application of the strippable paint to 110 is stopped.

After the strippable paint is applied to the automobile 12 as described above, the automobile 12 is transported to the work station of the roller device 21 under the transport action of the transport mechanism 16, and the applied strippable paint is applied to the rollers 92. Spread out by. This step will be described in detail. The rotation drive source 84 of the roller device 21 is urged to rotate the ball screw 86 (see FIG. 6), and the displacement member 8
8 is displaced in the direction of arrow B. Therefore, the roller 92 comes into contact with the hood 100 of the automobile 12 (see FIG. 1).

When the vehicle 12 is displaced in the direction of the arrow A under the conveyance operation of the conveyance mechanism 16, the rollers 92
Rotating while abutting on zero, the strippable paint applied to the application area 106 is spread over the entire area of the bonnet 100 to be protected. At this time,
Since the strippable paint is applied in a meandering shape, the strippable paint is spread uniformly on the surface of the application area 106, and the thickness of the formed protective film is prevented from being uneven.

When the strippable paint of the bonnet 100 is spread, the rotation drive source 8 of the roller device 21
4 is urged to rotate the ball screw 86 (see FIG. 6),
The roller 92 is displaced in the direction of arrow C. When one end of the application area 108 of the roof 102 is conveyed immediately below the roller 92 under the conveyance operation of the conveyance mechanism 16, the roller 92 is displaced in the direction of arrow B to bring the roller 92 into contact with the application area 108 of the roof 102. Let it. Then, as described above, the strippable paint applied to the application area 108 is spread over the entire area of the roof 102 to be protected.

Next, the roller 92 is brought into contact with the trunk 104 when one end of the application area 110 of the trunk 104 is transported directly below the roller 92 under the transport operation of the transport mechanism 16. Then, the application range 11 is
Spread out the strippable paint applied to 0.

When the strippable paint is applied to the automobile 12 and spread as described above, the strippable paint is dried by natural drying, forced drying, or the like. For this reason, the strippable paint serves as a protective film, and functions to protect the surface of the automobile 12.

In the first embodiment, the control unit 76
Based on information such as the size of the application ranges 106, 108, and 110 and the transport speed of the automobile 12, the application ranges 106, 1
08, 110, an appropriate amount of the strippable paint can be applied to the application areas 106, 108, and 110. The strippable paint is applied to the hood 100, the roof 102, and the trunk. It is prevented from flowing out of the protective film 104 and the thickness of the formed protective film is reduced. Further, since the strippable paint is applied in a meandering shape, the strippable paint is applied to the hood 100, the roof 102 and the trunk 104 by the rollers 92.
And the thickness of the formed protective film becomes uniform.

Further, the coating areas 106, 108 and 11 are slightly smaller than the area where the strippable paint should be protected.
After application within 0, the roller 92 spreads over the entire area to be protected, so that the concern that the strippable paint protrudes outside the area to be protected is eliminated.

Next, a protective film forming apparatus 120 according to a second embodiment of the present invention will be described. Note that the same components as those of the first embodiment are denoted by the same reference numerals,
A detailed description thereof will be omitted.

This protective film forming apparatus 120 is provided with an ejection device 122 instead of the roller device 21 of the protective film forming apparatus 10 of the first embodiment (see FIG. 1). The ejection device 122 is, similarly to the roller device 21, a rotary drive source 84.
As a result, the ball nut 87 is engaged with the rotating ball screw 86, and the displacement member 88 is fixed to the ball nut 87 (see FIG. 6). Frame 90 fixed to displacement member 88
Is provided with a compressed air ejection mechanism 124. As shown in FIGS. 7 and 8, the compressed air ejection mechanism 124 has a long box-shaped block 126, and a hose 128 to which compressed air is supplied is connected to an upper surface of the block 126.
28 is connected to a compressed air supply 130. Block 1
A plurality of compressed air outlets 132 are formed in a line on the lower surface of 26. The block 126 is provided with a plate member 134 for adjusting the mounting angle β in order to adjust the compressed air ejection angle α to the vehicle 12 to a desired angle.

A protective film forming apparatus 1 according to the second embodiment
20 is basically configured as described above, and its operation will be described next.

First, in the same manner as in the method of forming the protective film according to the first embodiment, the strippable paint is supplied from the nozzle devices 50a to 50d of the coating device 20 to the hood 1 of the automobile 12.
00, is discharged to the roof 102 and the trunk 104,
Under the reciprocating operation of the reciprocating mechanism 32, the strippable paint is applied to the bonnet 100, the roof 102 and the trunk 1.
04 is applied in a meandering shape (see FIG. 1).

The vehicle 12 to which the strippable paint has been applied is conveyed to the working position of the ejection device 122 under the action of the conveyance mechanism 16, and the applied strippable paint is spread by the compressed air ejection mechanism 124.

That is, the rotation drive source 8 of the ejection device 122
4 is urged to rotate the ball screw 86 (see FIG. 6),
The displacement member 88 is displaced in the direction of arrow B. When the compressed air ejection mechanism 124 is displaced to a position slightly higher than the height of the hood 100 of the automobile 12, the compressed air ejection mechanism 124
Is stopped at a position separated from the surface of the hood 100 by a predetermined distance.

When the compressed air supply source 130 is energized, compressed air is introduced into the block 126 via the hose 128, and compressed air is ejected from the compressed air ejection port 132. This compressed air is guided to the plate member 134 and is ejected to the surface of the bonnet 100 at a compressed air ejection angle α. The strippable paint applied to the bonnet 100 is spread over the entire bonnet 100 by the pressure of the jetted compressed air. At this time, since the strippable paint is applied in a meandering shape, the strippable paint is uniformly spread over the surface of the bonnet 100, and the thickness of the formed protective film is prevented from becoming uneven. The automobile 12 moves in the direction of arrow A under the conveyance action of the conveyance mechanism 16, and the compressed air ejection mechanism 124 is displaced relatively to the bonnet 100 to supply the compressed air to the strippable paint applied to the bonnet 100. Spout continuously to spread the strippable paint.

Similarly, the roof 102 and the trunk 10
The strippable paint applied to the application areas 108 and 110 of No. 4 is spread by the pressure of the compressed air ejected from the compressed air ejection mechanism 124.

After the strippable paint is applied to the automobile 12 and spread as described above, the strippable paint is dried by natural drying, forced drying, or the like.
For this reason, the strippable paint serves as a protective film, and functions to protect the surface of the automobile 12.

Next, a protective film forming apparatus 140 according to a third embodiment will be described in relation to a method for forming a protective film on a painted surface of an automobile.

In the protective film forming device 140, as shown in FIGS. 9 and 10, a coating device 142 and a roller device 144 are provided side by side on one side of the transport mechanism 16.
The coating device 142 has a guide rail 146 provided in parallel with the transport mechanism 16 and a guide block 148 slidably engaged with the guide rail 146. A gear 150 is provided which is rotated by the source. The gear 150 meshes with a rack 152 provided in parallel with the guide rail 146.
A support 154 is provided upright on the guide block 148, and a ball screw 158 rotated by a rotation drive source 156 is provided inside the support 154. A ball nut 159 is engaged with the ball screw 158, and a displacement member 160 is fixed to the ball nut 159. One end of a long frame 162 is fixed to the displacement member 160, and nozzle devices 50a to 50d are provided on the other end of the frame 162, similarly to the protective film forming apparatus 10 of the first embodiment.

The roller device 144 is, as shown in FIG.
Guide rail 166 provided in parallel with transport mechanism 16
And a guide block 168 slidably engaged with the guide rail 166, and a gear 170 rotated by a rotation drive source (not shown) is provided on a side portion of the guide block 168.
Is provided. The gear 170 meshes with a rack 172 provided in parallel with the guide rail 166. The guide block 168 includes the roller device 21 of the protective film forming apparatus 10.
Similarly, the support 82 is erected (see FIG. 6).
, A displacement member 88 is provided so as to be displaceable in the arrow B or C direction. One end of a frame 90 is fixed to the displacement member 88, and a roller 92 is rotatably provided on the other end of the frame 90.

A protective film forming apparatus 1 according to the third embodiment
40 is basically configured as described above, and its operation will be described next.

The automobile 12 as a work is transported in the direction of arrow A by the transport mechanism 16 and stops at the work station of the coating device 142. When the gear 150 rotates under the urging action of a rotation drive source (not shown), the gear 150 and the rack 1
The guide block 148 is displaced in the direction of the arrow E at a predetermined moving speed under the meshing operation of 52.

When the nozzle device 50a to 50d is displaced to a position slightly higher than the height of the hood 100 of the automobile 12 by urging the rotation drive source 156 of the coating device 142, the control unit 76, as shown in FIG. The electromagnetic valve 70 and the electromagnetic valves 68a to 68d are turned on, and the strippable paint is supplied from the tank 74 to the nozzle devices 50a to 50d. For this reason, the strippable paint is
Then, the paint is applied to the inside of the application area 106 from the many narrow grooves 60 through the passages 56 and 58, and the strippable paint is applied to the bonnet 100 in a straight line.

Similarly, the roof 102 and the trunk 10
The strippable paint is applied to the application areas 108 and 110 of No. 4.

After the strippable paint is applied to the automobile 12 as described above, the automobile 12 is transported under the transport action of the transport mechanism 16, and the automobile 12 is
Stop at the 44 working station.

When the gear 170 rotates under the urging action of a rotary drive source (not shown) of the roller device 144, the guide block 168 is displaced in the direction of arrow E at a predetermined moving speed under the meshing action of the gear 170 and the rack 172.

The rotation drive source 84 of the roller device 144 is urged to rotate the ball screw 86 (see FIG. 6), the displacement member 88 is displaced in the direction of arrow B, and the roller 92 comes into contact with the hood 100 of the automobile 12. . As described above, since the roller device 144 is displaced in the direction of arrow E,
2 rotates while abutting on the bonnet 100 and spreads the strippable paint so as to spread over the application range 106.

When the strippable paint of the bonnet 100 is spread, the rotation drive source 84 of the roller device 144 is urged, and the roller 92 is displaced in the direction of arrow C. The roller 92 is rotated by the rotation of the
When the roller 92 is displaced upward, the roller 92 is displaced in the direction of arrow B to bring the roller 92 into contact with the roof 102. Then, the roller 92 spreads the strippable paint applied to the application area 108 of the roof 102.

Next, when the roller 92 moves above the application range 110 of the trunk 104, the roller 92 is brought into contact with the trunk 104 and the strippable paint is spread by the roller 92.

After the strippable paint is applied to the automobile 12 and spread as described above, the strippable paint is dried by natural drying, forced drying, or the like.
For this reason, the strippable paint serves as a protective film, and functions to protect the surface of the automobile 12.

As described above, in the third embodiment,
The strippable paint is applied to the automobile 12 in a straight line. This eliminates the need for a reciprocating mechanism, so that the structure can be simplified and the cost of the protective film forming apparatus 140 can be reduced.

[0060]

According to the method and the apparatus for forming a protective film on a painted surface of an automobile according to the present invention, the following effects and advantages can be obtained.

The control unit controls the amount of the strippable paint based on the size of the area to be protected of the work and the relative moving speed of the work and the nozzle device, thereby protecting the work with an appropriate amount of the strippable paint. It can be applied precisely to the area to be stripped, preventing the strippable paint from flowing outside this area and preventing the formed protective film from becoming uneven in thickness.

Further, since the strippable paint is applied in a meandering shape, when the strippable paint is spread by a roller or a compressed air ejection mechanism, the strippable paint is uniformly spread and formed on the surface of the area to be protected. The thickness of the protective film becomes uniform. Furthermore, since the strippable paint is applied to the inside of the work to be protected and then spread by a roller or a compressed air ejection mechanism, there is no concern that the strippable paint will protrude outside the work to be protected.

[Brief description of the drawings]

FIG. 1 is a plan view of a protective film forming apparatus according to a first embodiment of the present invention.

FIG. 2 is a front view of a coating apparatus used in the protective film forming apparatus shown in FIG.

FIG. 3 is a block diagram of a nozzle device used in the protective film forming apparatus shown in FIG.

4 is a partially enlarged longitudinal sectional view of the nozzle device shown in FIG.

5 is a partially enlarged cross-sectional view of the nozzle device shown in FIG.

FIG. 6 is a front view of a roller device used in the protective film forming apparatus shown in FIG.

FIG. 7 is a perspective view of a compressed air ejection mechanism used in a protective film forming apparatus according to a second embodiment of the present invention.

8 is a longitudinal sectional view of the compressed air ejection mechanism shown in FIG.

FIG. 9 is a plan view of a protective film forming apparatus according to a third embodiment of the present invention.

FIG. 10 is a front view of a coating apparatus used in the protective film forming apparatus shown in FIG.

[Explanation of symbols]

10, 120, 140: protective film forming device 12: automobile 16: transport mechanism 20, 142: coating device 21, 144: roller device 32: reciprocating mechanism 50a to 50d:
Nozzle devices 66a to 66d ... flow meters 68a to 68d,
70 electromagnetic valve 76 control unit 92 rollers 106, 108, 110 application range 122 ejection device 124 compressed air ejection mechanism

Claims (6)

[Claims] 1. A method of forming a protective film of strippable paint on a painted surface of a vehicle to temporarily protect the painted surface of the vehicle, comprising a plurality of pores in a width direction of the vehicle and the vehicle. While relatively displacing the formed nozzle device, the stripperable paint is controlled from the pores of the nozzle device according to the size of the area to be protected of the coating surface by controlling the flow rate on the coating surface. Applying, applying the strippable paint spread over the entire area of the coating surface to be protected by the roller, while relatively displacing the vehicle and the roller, and applying the coating to the coating surface. Drying the strippable paint obtained to form a protective film. A method for forming a protective film on a painted surface of an automobile, comprising: 2. The method according to claim 1, wherein, in the step of applying the strippable paint to a painted surface of the vehicle, a size of an area to be protected of the painted surface and a relative position between the vehicle and the nozzle device. Controlling the amount of the strippable paint applied to the painted surface of the vehicle based on a typical displacement speed. 3. The method according to claim 1, wherein, in the step of applying the strippable paint to a painted surface of the vehicle, the nozzle device is relatively reciprocated in a width direction of the vehicle. A method of forming a protective film on a painted surface of an automobile, comprising applying a varnish to the painted surface in a meandering manner. 4. The method according to claim 1, wherein in the step of spreading the strippable paint over the entire area of the painted surface to be protected, compressed air is used instead of the roller. By displacing the ejection mechanism relative to the automobile and blowing compressed air from the compressed air ejection mechanism onto the applied strippable paint, the strippable paint is applied over the entire area of the painted surface to be protected. A method for forming a protective film on a painted surface of an automobile, characterized by spreading. 5. The method according to claim 1, wherein in the step of applying the strippable paint to a painted surface of the vehicle, the step of applying the strippable paint to a protected area of the painted surface. A method for forming a protective film on a painted surface of an automobile, wherein the method is applied within a smaller range. 6. An apparatus for forming a protective film made of strippable paint on the painted surface to temporarily protect the painted surface of the automobile, wherein the strippable paint is discharged onto the painted surface of the automobile. A nozzle device, a displacement mechanism that relatively displaces the automobile and the nozzle device, an on / off valve that is connected to the nozzle device and controls supply or stop of the strippable paint, and is connected to the nozzle device. A flow meter for measuring a flow rate of the strippable paint; and a control unit for controlling the on / off valve, wherein the control unit has a size of a protected area of the painted surface, the vehicle and the vehicle. The amount of the strippable paint applied to the area to be protected of the painted surface is controlled based on the relative displacement speed with respect to the nozzle device. Protective film forming apparatus according to claim and.