JP2005161197A - Protective layer forming material application method and its system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve production efficiency and to simplify work by automating a process of applying a protective layer forming material and to make the quality of a formed peelable protective layer uniform. <P>SOLUTION: A first station 16 including first to fourth robots 20a to 20d and a second station 18 including fifth to eighth robots 20e to 20h are disposed near a conveyance line 12. Jet mechanisms 46 and roller application mechanisms 90 for jetting the protective layer forming material are respectively installed at the tips of respective third arms 44 of the first to fourth robots 20a to 20d and the fifth to eighth robots 20e to 20h. The protective layer forming material composed of an acrylic-based copolymer agent acting as the peelable protective layer after drying is applied to the central part of an automobile body 14 under the working of the jet mechanisms 46 and is further applied at the end of the automobile body 14 under the working of the roller application mechanisms 90 at the second station 18. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a protective layer forming material application method and system for applying a liquid protective layer forming material that acts as a peelable protective layer after drying to the outer surface of an automobile body that has undergone a coating process.

  A vehicle such as an automobile is usually stored in an outdoor stockyard or transported by a trailer, a ship, or the like until it is handed to a user after manufacture. During this time, the vehicle is exposed to dust, metal powder, salt, oil, acid, direct sunlight, etc., so the quality of the surface layer among the multiple paint layers on the outer surface of the vehicle during long-term storage and transportation There is concern that it will change.

  In order to avoid the change in the quality of the surface layer, Patent Document 1 proposes a method of forming a peelable protective layer on the surface of the paint layer at the stage before vehicle shipment. Such a peelable protective layer is formed by applying and drying a protective layer forming material (also called strippable paint) that is a liquid wrap material, and the paintable layer is protected by the presence of this peelable protective layer. can do. In addition, this peelable protective layer does not peel naturally during normal storage, and can be easily peeled when removed.

  The protective layer forming material is usually applied to the automobile body by a plurality of workers attaching the protective layer forming material to the roller and rolling the roller on the automobile body. However, in this case, the operator needs to perform complicated work. Moreover, the film thickness of the applied protective layer forming material may vary depending on the operator, and eventually the quality of the peelable protective layer may vary.

  Therefore, in Patent Document 2, in order to reduce the burden on the operator and make the coating quality uniform, the protective layer forming material is applied to the automobile body in a linear shape and then blown with air to spray the protective layer forming material. A method of diffusing is proposed. According to this method, since many of the operations in the coating process of the protective layer forming material are automated, the burden on the operator can be reduced and the tact time can be improved, which is preferable.

  In a factory that produces vehicles, a resin cover called a scratch cover may be temporarily attached so as not to damage the body during assembly work. For example, the scratch cover is temporarily attached to the front lateral surface of the body and removed before shipping. It is necessary to prepare a scratch cover having a different shape for each vehicle type, and it is also necessary to prepare a large number of scratch covers according to the daily production number in the transfer line.

JP 2001-89697 A (paragraphs [0022] to [0027]) JP-A-8-173882 (FIG. 1)

  By the way, with the method disclosed in Patent Document 2, the degree of diffusion of the protective layer forming material is not always uniform. In addition, this method is difficult to carry out at such a site because the protective layer forming material scatters at the edge (the end of the automobile body) such as a roof or bonnet.

  Furthermore, the shape of a recent automobile body is becoming more complicated, for example, by providing uneven portions and complicated curved surfaces. In such uneven portions and curved surfaces, it is difficult to diffuse the protective layer forming material by the air nozzle. Furthermore, it is necessary to apply a relatively thick protective layer forming material to places where quality is particularly important, but it is difficult to adjust the film thickness when the protective layer forming material is diffused by an air nozzle. .

  For this reason, after the protective layer forming material is diffused with the air nozzle, several workers need to apply the protective layer forming material with the roller to the details such as the edges and uneven portions of the roof and perform the finishing process. There is. That is, the finishing process for applying the protective layer forming material must be done manually. For this reason, it becomes difficult to reduce the burden on the operator, and it is impossible to completely avoid the variation in the coating quality depending on the skill level of the operator.

  Therefore, for example, it is recalled that the protective layer forming material is sprayed from a nozzle or the like. However, in this case, when the diffusion width of the protective layer forming material is increased and sprayed, the protective layer forming material is scattered in an island shape. On the other hand, if the diffusion width is reduced in order to avoid this scattering, there is a problem that the protective layer forming material cannot be efficiently applied to the automobile body.

  The present invention has been made to solve the above-described problems, and it is intended to automate the process of applying and diffusing a protective layer forming material on the outer surface of an automobile body, simplifying the work and making the coating quality uniform. An object of the present invention is to provide a method and system for applying a protective layer forming material that can be made possible.

In order to achieve the above-described object, the present invention provides a protective layer forming material application in which a liquid protective layer forming material that functions as a peelable protective layer after drying is applied to an automobile body at both the first station and the second station. A method,
In either one of the first station or the second station, the protective layer forming material is ejected from an ejection mechanism installed in an arm portion of a robot and applied to the automobile body,
In one of the remaining of the first station or the second station, the jetting mechanism is configured to rotate a roller on an automobile body while supplying the protective layer forming material to a roller coating mechanism installed in an arm portion of a robot. The protective layer forming material is applied to a part other than the part applied under the action of the above.

  According to the present invention, the protective layer forming material is applied to the automobile body by the jetting mechanism and the roller applying mechanism that have been taught in advance. That is, the step of applying the protective layer forming material can be automatically performed. Thereby, while being able to improve application | coating efficiency, an operation | work can be simplified. In addition, the coating quality can be homogenized.

  In addition, it is preferable to apply the protective layer forming material to the end of the automobile body by a roller application mechanism. In this case, the ejection mechanism applies the protective forming agent to the central part of the automobile.

  In the application by the ejection mechanism, there is a tendency that the protective layer forming material scatters and adheres in an island shape at the end of the automobile body, resulting in unpainted or uneven coating. However, in the present invention, the protective layer forming material is applied to the end of the automobile body by the roller application mechanism. According to this method, it is possible to reliably avoid the protective layer forming material from adhering to the end of the automobile body in an island shape. Therefore, the protective layer-forming material can be applied evenly to the end portions, and after all, unpainted and uneven coating can be suppressed, so that a uniform peelable protective layer can be formed.

  In this case, it is preferable to apply the protective layer forming material by the ejection mechanism at the first station, and apply the protective layer forming material by the roller application mechanism at the second station. The protective layer forming material ejected from the ejection mechanism is applied in a wider range than the roller application mechanism. Therefore, for example, after the protective layer forming material is applied over a wide range of the automobile body via the ejection mechanism, the protective layer forming material is finish-coated on the remaining end portion by the roller coating mechanism, thereby leaving uncoated or uneven coating. The protective layer forming material can be applied without any problem.

  In addition, an acrylic copolymer agent can be mentioned as a suitable example of a protective layer forming material.

Further, the present invention is a protective layer forming material application system for applying a liquid protective layer forming material that functions as a peelable protective layer after drying to an automobile body at both the first station and the second station,
A spray coating mechanism that is disposed at either one of the first station or the second station and sprays the protective layer forming material from a spray mechanism installed on an arm portion of a robot, and coats the car body.
By rotating the roller on the vehicle body while supplying the protective layer forming material to a roller disposed in one of the remaining of the first station or the second station and installed in the arm portion of the robot, A roller application mechanism for applying the protective layer forming material to a part other than the part applied under the action of the ejection mechanism;
It is characterized by having.

  That is, in the present invention, the protective layer forming material is applied to a wide range of the automobile body by an ejection mechanism capable of applying the protective layer forming material over a wide range in a short time, while the protective layer forming material is applied accurately. The protective layer forming material is applied to the remaining portion of the automobile body by a roller application mechanism that can be applied. For this reason, the protective layer forming material can be applied efficiently and evenly. Eventually, unpainted portions and uneven coating are extremely reduced, so that a uniform peelable protective layer can be formed.

  In this case, it is preferable that the spray coating mechanism is disposed at the first station and the roller coating mechanism is disposed at the second station. In other words, it is preferable that after the protective layer forming material is applied over a wide range of the automobile body via the ejection mechanism, the protective layer forming material is finished and applied to the remaining portion by the roller coating mechanism. Thereby, it is possible to further suppress the occurrence of unpainted or uneven coating.

  In any case, the roller is preferably made of a material that absorbs and stores the protective layer forming material. Thereby, the excessively applied protective layer forming material is absorbed by the roller. Accordingly, it is possible to avoid the surplus protective layer forming material from remaining in the automobile body, and thus it is possible to further suppress uneven coating.

  Further, it is preferable that the ejection mechanism is capable of ejecting the protective layer forming material without accompanying air, that is, a so-called airless type. Such a jetting mechanism has a reproducibility of a coating pattern when a protective layer forming material is applied with a predetermined coating width and amount as compared with a general jetting mechanism that jets a protective layer forming material with air. Becomes remarkably good. In other words, it becomes easy to obtain a desired coating pattern.

  Furthermore, it is preferable to have a water supply line for supplying water to the ejection mechanism and the roller, and to wash the ejection mechanism and the roller by supplying water to the ejection mechanism and the roller. Thereby, the protective layer forming material supply line can be easily cleaned by a simple operation of switching the line. In other words, maintenance work can be easily performed.

  According to the present invention, the protective layer forming material is applied to the automobile body by either the ejection mechanism or the roller application mechanism at the first station or the second station. For this reason, the process of apply | coating a protective layer forming material can be automated, and the effect of improving application | coating efficiency is achieved. In addition, the work can be simplified and the coating quality can be homogenized.

  Furthermore, by using an acrylic copolymer as a material for the protective layer forming material, the automobile body can be reliably protected. Moreover, this film is extremely easy to peel off.

  Hereinafter, preferred embodiments of the coating method for a protective layer forming material according to the present invention will be described in detail in relation to a system for carrying out the coating method, with reference to the accompanying drawings.

  FIG. 1 shows an overall schematic perspective view of a protective layer forming material coating system (hereinafter also simply referred to as a coating system) according to the present embodiment. As can be understood from FIG. 1, the coating system 10 is provided in the transportation line 12 of the automobile and protects the automobile body 14 that has undergone the painting process at both the first station 16 and the second station 18. A layer forming material is applied.

  As shown in FIG. 2, the first station 16 includes four first to fourth robots 20 a to 20 d that are industrial robots, and a first control unit 22 that performs system control of the first station 16. A first tank 24 containing a protective layer forming material, a first coating material conduit 26 communicating from the first tank 24 to the first to fourth robots 20a to 20d, and a first water supply source 28. And a first water pipe 30 for supplying water to the first to fourth robots 20a to 20d. The first to fourth robots 20a to 20d are controlled by robot controllers 32a to 32d connected to the first control unit 22, respectively.

  The first robot 20a and the third robot 20c are disposed on the left hand side in the traveling direction of the automobile body 14 in the transfer line 12, while the second robot 20b and the fourth robot 20d are disposed on the right hand side in the traveling direction. Yes. Further, the first robot 20a and the second robot 20b are provided forward in the traveling direction, and the third robot 20c and the fourth robot 20d are provided backward in the traveling direction. These first to fourth robots 20 a to 20 d are displaceable on a first slide rail 34 provided so as to extend in a direction parallel to the transport line 12.

  A first pump 36 is provided in the middle of the first coating material pipe line 26, and the first pump 36 sucks the protective layer forming material from the first tank 24 and first to fourth robots 20 a to 20 d. To supply. Further, the temperature of the first tank 24 and the first coating material pipe 26 is controlled by a heater and a thermometer (not shown), and the protective layer forming material is kept at an appropriate temperature.

  The material of the protective layer forming material is mainly composed of an acrylic copolymer agent, and preferably has two kinds of acrylic copolymer parts having different glass transition temperatures. Specifically, for example, the protective layer forming material disclosed in Patent Document 1 may be used. In addition, the protective layer forming material can adjust the viscosity by changing the mixing ratio with water and the temperature, and when it is dried, it adheres to the automobile body 14 and becomes dust, metal powder, salt, oil, acid, direct sunlight. It is possible to chemically and physically protect the painted portion of the automobile body 14 from the above. Further, when the automobile body 14 is removed to the user upon delivery, it can be easily peeled off.

  As shown in FIG. 3, the first robot 20 a is, for example, an industrial articulated robot, and includes a base portion 38, and a first arm 40 and a second arm 42 in order based on the base portion 38. And a third arm 44, and an ejection mechanism 46 described later is provided at the tip of the third arm 44.

  The first arm 40 can be rotated by axes J1 and J2 that can be rotated horizontally and vertically with respect to the base portion 38. In addition, the second arm 42 is connected to the first arm 40 so as to be rotatable about the axis J3, and the tip end portion thereof can be twisted and rotated about the axis J4. Further, the third arm 44 is connected to the second arm 42 so as to be rotatable about an axis J5, and the tip end portion thereof can be twisted and rotated about the axis J6.

  The remaining second to fourth robots 20b to 20d are configured in the same manner as the first robot 20a. Therefore, the same constituent elements are denoted by the same reference numerals, and detailed description thereof is omitted. Note that the first to fourth robots 20a to 20d may have an operation unit such as an expansion / contraction operation and a parallel link operation in addition to the rotation operation.

  And the ejection mechanism 46 to which a protective layer formation material is supplied by the 1st coating material pipe line 26 is provided in the front-end | tip part of the 3rd arm 44 of 1st-4th robot 20a-20d, respectively. These ejection mechanisms 46 can be moved to any position in the vicinity of the vehicle body 14 and can be set in any direction by the operations of the first to fourth robots 20a to 20d having the six-axis configuration as described above. is there. In other words, the ejection mechanism 46 can move with 6 degrees of freedom.

  In this case, the ejection mechanism 46 includes a first end gun tip 48a closest to the third arm 44, a second end gun tip 48b farthest from the third arm 44, and the first end gun tip 48a and the second end gun tip 48b. The first to third intermediate gun tips 48c to 48e interposed between the first and third intermediate gun tips 48b to 48e are provided as ejection portions. And the space | interval of adjacent gun tips is set large as it goes to the 2nd end gun tip 48b from the 1st end gun tip 48a.

  The first coating material pipe 26 is divided into three parts, ie, first to third branch pipes 50a to 50c. The first branch pipe 50a is further divided into two parts, and the first end gun tip 48a and the first intermediate gun tip 48c. Is communicated with a passage (not shown) provided in. Further, the second branch pipe 50b communicates with the passage of the second intermediate gun tip 48d, and the third branch pipe 50c is divided into two like the first branch pipe 50a, and the third intermediate gun tip 48e and the second end gun tip are provided. It communicates with the passage 48b.

  A supply mechanism for ejecting a protective layer forming material or water is connected to each of the gun chips 48a to 48e. That is, for example, a hydraulic and pneumatic first composite circuit 60 for supplying a protective layer forming material to the first end gun tip 48a and the first intermediate gun tip 48c includes a compressor 62, The secondary side pressure is reduced by an air tank 64 connected to the discharge part of the compressor 62, a manual air pressure input valve 66 for switching between air pressure supply and cutoff, and an electric signal supplied from the first control part 22. A regulator 68 and a regulator operation valve 70 that is pilot-operated by the secondary pressure of the regulator 68 and reduces the pressure of the first branch pipe 50a.

  As can be understood from this, the gun tips 48a to 48e constituting the ejection mechanism 46 can eject the protective layer forming material without accompanying air. That is, each of the gun tips 48a to 48e is a so-called airless type nozzle.

  The first composite circuit 60 includes an MCV (Material Control Valve) 72 to which the secondary side pipe of the regulator operation valve 70 and the first water pipe 30 are connected, a secondary side of the MCV 72, and an ejection mechanism. , And a trigger valve 74a provided between the two. In the MCV 72, there are provided switching valves 72a and 72b for switching between communication and blocking of the first coating material pipe line 26 and the first water pipe line 30, and the secondary side of the switching valves 72a and 72b is in communication. doing. In addition, the broken line in FIG. 4 shows a pneumatic pipe line.

  The first composite circuit 60 further includes an MCV switching electromagnetic valve 76 for operating the switching valves 72a and 72b in a pilot manner by switching the air pressure supplied from the pneumatic injection valve 66, and a trigger switching for piloting the trigger valve 74a. And a solenoid valve 78. The MCV switching electromagnetic valve 76 makes one of the switching valves 72a and 72b communicate with each other and shuts off the other by an electric signal supplied from the first control unit 22, and switches between water and the protective layer forming material to trigger the trigger valve 74a. To supply. The trigger switching electromagnetic valve 78 supplies the protective layer forming material or water to the ejection mechanism 46 by switching the trigger valve 74 a to communication / interruption by an electric signal supplied from the first control unit 22. The MCV 72, the trigger valve 74a, and the regulator operation valve 70 are not limited to the pneumatic pilot type, but may be a drive type such as an electric solenoid.

  Manual stop valves 80 and 82 are provided in the middle of the first coating material pipeline 26 and the first water pipeline 30, respectively. Normally, the stop valves 80 and 82 are kept in communication. In the first composite circuit 60, silencers 84 are respectively provided at the air outlets to reduce the exhaust noise. The compressor 62, the first pump 36, and the first water supply source 28 are provided with a relief valve (not shown) that prevents an excessive pressure rise.

  The above configuration is the same in the second branch pipe 50b and the third branch pipe 50c. Therefore, illustration and detailed description of devices other than the trigger valves 74b and 74c are omitted.

  Note that the compressor 62, the air tank 64, the first water supply source 28, and the first pump 36 in the first composite circuit 60 are shared by the first to fourth robots 20a to 20d, and other devices are the first one. Each of the fourth robots 20a to 20d is provided.

  On the other hand, as shown in FIG. 5, the second station 18 is configured in the same manner as the first station 16 except that a roller coating mechanism 90 described later is provided instead of the ejection mechanism 46. For this reason, in the 2nd station 18, the same name is attached | subjected to the apparatus / mechanism same as the apparatus / mechanism which comprises the 1st station 16, and detailed description is abbreviate | omitted depending on the case.

  That is, the second station 18 includes fifth to eighth robots 20e to 20h configured similarly to the first to fourth robots 20a to 20d, and a second control unit 92 that performs system control of the second station 18. , A second tank 94 in which the protective layer forming material is accommodated, a second coating material pipe 96 communicating from the second tank 94 to each of the fifth to eighth robots 20e to 20h, and a second water supply source 98. And a second water conduit 100 for supplying water to the fifth to eighth robots 20e to 20h. The fifth to eighth robots 20e to 20h are controlled by robot controllers 32e to 32h connected to the second control unit 92, respectively. Of course, the fifth to eighth robots 20e to 20h can be displaced on the second slide rail 102 parallel to the transport line 12.

  As shown in FIG. 6, a roller coating mechanism 90 is provided at the tip of the third arm 44 in the fifth robot 20e. This roller coating mechanism 90 can move with six degrees of freedom like the ejection mechanism 46 under the action of the fifth to eighth robots 20e to 20h operating in the same manner as the first to fourth robots 20a to 20d. . That is, the roller coating mechanism 90 can be moved to an arbitrary position in the vicinity of the automobile body 14 and can be set in an arbitrary direction.

  The roller application mechanism 90 is attached to the tip of the third arm 44 and has a roller 104 made of a material having a cylindrical shape with a width W and capable of absorbing and storing the protective layer forming material. The roller 104 is rotatably attached to a holding unit 106, and the second coating material pipe 96 is connected to one end of the holding unit 106.

  The roller coating mechanism 90 is supplied with the protective layer forming material sucked up from the second tank 94 by the pump 108 interposed in the second coating material pipe 96. That is, the protective layer forming material is supplied from the second coating material conduit 96 to the axial center portion of the roller 104 and oozes out on the surface of the roller 104. As the material of the roller 104, a sponge, a flocked body and the like are suitable. The roller 104 is detachable from the holding unit 106, and can be replaced, cleaned, and maintained.

  Of course, the above configuration is the same for the sixth to eighth robots 20f to 20h.

  The hydraulic and pneumatic second composite circuit for supplying the protective layer forming material to the roller 104 is configured in the same manner as the first composite circuit 60 shown in FIG. Therefore, the illustration and detailed description thereof are omitted.

  Next, a method for applying the protective layer forming material to the automobile body 14 using the protective layer forming material application system 10 configured as described above will be described.

  In the present embodiment, the protective film forming material is applied to the center of the automobile by the first to fourth robots 20a to 20d, and is applied to the end of the automobile by the fifth to eighth robots 20e to 20h. Therefore, first, the operation is taught to the first to fourth robots 20a to 20d and the fifth to eighth robots 20e to 20h.

  That is, the bonnet part, the front roof part, the roof right rear part, and the roof left rear part of the automobile body 14 are respectively assigned to the first to fourth robots 20a to 20d, and the ejection mechanism 46 has a predetermined trajectory on each responsible part. The teaching data taught is recorded in a predetermined recording unit of the first control unit 22 and retained. Similarly, the fifth to eighth robots 20e to 20h share the bonnet end, the front roof end, the roof right rear end, and the roof left rear end of the vehicle body 14, respectively. The roller application mechanism 90 is taught to be displaced along a predetermined trajectory, and the taught teaching data is recorded and held in a predetermined recording unit of the second control unit 92.

  The teaching of the operation of the first to eighth robots 20a to 20h is performed by, for example, actually operating the first to eighth robots 20a to 20h, and at this time, gun tips 48a to 48e along predetermined portions of the automobile body 14. May be performed while visually confirming by the operator so that the rollers 104 come into contact with each other at predetermined intervals and so that the rollers 104 come into contact with predetermined portions of the automobile body 14. Alternatively, operation teaching may be performed by a so-called offline teaching method in which teaching is performed on a three-dimensional CAD using a solid model or the like. In any case, teaching is performed so that the process of applying the protective layer forming material ends within the tact time set for each vehicle body 14 in the transport line 12.

  Here, even if the conveyance line 12 corresponds to a plurality of vehicle types or is of the same vehicle type, for example, a detailed shape such as the presence or absence of a sunroof hole 14a (see FIG. 1), a bulging portion (also called a bulge), or a rear spoiler. May be different. Therefore, in order to cope with the difference in the vehicle type and the detailed shape, the operations of the first to eighth robots 20a to 20h may be taught according to the individual vehicle type and the detailed shape. The first control unit 22 and the second control unit 92 receive a signal indicating the vehicle type and the detailed shape from the transport line 12 and select teaching data based on the signal to operate the first to eighth robots 20a to 20h. Let

  Since the ejection mechanism 46 or the roller coating mechanism 90 can be operated with six degrees of freedom by the mechanisms of the first to fourth robots 20a to 20d or the fifth to eighth robots 20e to 20h, the vehicle body of a complicated shape is used. 14 can also be supported.

  On the other hand, the temperature of the first tank 24 (see FIG. 2), the first coating material pipe 26, the second tank 94 (see FIG. 5), and the second coating material pipe 96 is previously adjusted to an appropriate temperature with a heater. . And while operating the compressor 62, the 1st water supply source 28, the 2nd water supply source 98, and the pump 108, it makes the 1st-4th robot 20a-20d stand by in the position which does not interfere with the vehicle body 14, The air pressure input valve 66 is communicated.

  Further, the viscosity of the protective layer forming material is adjusted so that it does not flow down even when it is applied to a curved portion or a bent portion of the automobile body 14. By thus setting the viscosity large, it can also be applied to the vertical surface of the automobile body 14. Thereby, while being able to protect the coating part of a vertical surface, it can avoid that a damage | wound generate | occur | produces in the motor vehicle body 14 in an assembly operation. Therefore, it is not particularly necessary to attach a scratch cover to this portion.

  Next, the painted car body 14 is carried in by the transfer line 12 and stopped near the first to fourth robots 20a to 20d. Here, the automobile body 14 is not limited as long as it has undergone a painting process, and may be an incomplete vehicle to which no parts or the like are attached.

  The first control unit 22 recognizes that the automobile body 14 has been carried in by a signal or a sensor (not shown) supplied from the transfer line 12, and determines the first to fourth robots 20a to 20d based on the teaching data. Make it work. Thereby, each ejection mechanism 46 of the 1st-4th robot 20a-20d is arrange | positioned in the predetermined | prescribed site | part of the motor vehicle body 14. As shown in FIG. A preferred distance between the automobile body 14 and the ejection mechanism 46 is approximately 20 mm to 70 mm.

  The first control unit 22 controls the regulator operation valve 70 via the regulator 68 (see FIG. 4), thereby forming a protective layer that circulates in the first branch pipe 50a, the second branch pipe 50b, and the third branch pipe 50c. The pressure when the material is ejected is set to 0.05 MPa, 0.2 MPa, and 0.5 MPa, for example.

  On the other hand, the first control unit 22 controls the MCV 72 via the MCV switching electromagnetic valve 76 to connect the first coating material pipeline 26 and shut off the first water pipeline 30. Further, the first control unit 22 causes the trigger valves 74 a to 74 c to communicate with each other by operating the trigger switching electromagnetic valve 78.

  Under the control action as described above by the first controller 22, the protective layer forming material maintained at an appropriate temperature is obtained from the first end gun tip 48a, the first to third intermediate gun tips 48c to 48e, and the second end gun tip 48b. Injected toward the automobile body 14. In other words, application of the protective layer forming material to the automobile body 14 is started. At this time, as described above, the first end gun tip 48a and the first intermediate gun tip 48c connected to the first branch pipe 50a are 0.05 MPa, the second intermediate gun tip 48d is 0.2 MPa, and the third intermediate gun tip 48e. The protective layer forming material is ejected from the second end gun tip 48b at an ejection pressure of 0.5 MPa.

  By making the ejection pressure different in this way, the diffusion width of the protective layer forming material is set small on the end side of the automobile body 14 and large on the center side. Thereby, since the application | coating range of a protective layer forming material becomes narrow in the edge part side of the motor vehicle body 14, it is suppressed significantly that a protective layer forming material scatters and adheres to island shape.

  In addition, for example, the protective layer forming material ejected from the second end gun tip 48b is scattered in the region where the protective layer forming material is applied by the third intermediate gun tip 48e and adheres to the automobile body 14 in an island shape. However, the protective layer forming material sprayed from the third intermediate gun tip 48e is applied to this region. For this reason, a uniform peelable protective layer is finally formed.

  As described above, according to the present embodiment, the protective layer forming material is prevented from scattering on the end side of the automobile body 14, while another protective layer is formed on the central side even if scattering occurs. Since the material is applied, uneven application and the like can be eliminated.

  Moreover, the protective layer forming material can be applied over a wide range in a short time by ejecting the protective layer forming material through the gun chips 48a to 48e.

  When the above application is performed, the first to fourth robots 20a to 20d are displaced on the first slide rail 34 at a predetermined speed. And after application | coating of a protective layer formation material is complete | finished, the motor vehicle body 14 is conveyed along the conveyance line 12 to the following process. At this time, the first to fourth robots 20a to 20d are retracted to a position where they do not interfere with the vehicle body 14 and wait until the next vehicle body 14 is carried. At this time, the second control unit 92 stops the supply of the protective layer forming material by blocking the trigger valves 74a to 74c.

  In this manner, the protective layer forming material is applied to the end portion of the automobile body 14 on which the protective layer forming material is applied at the central portion at the first station 16 at the second station 18.

  At this time, the second control unit 92 performs the same control as the first control unit 22. That is, the regulator operation valve is controlled via the regulator of the second composite circuit, and the second coating material pipe 96 is controlled to an appropriate pressure.

  Further, the second control unit 92 controls the MCV via the MCV switching electromagnetic valve, thereby causing the second coating material pipe 96 to communicate with each other and shutting off the second water pipe 100, and further, the trigger switching electromagnetic valve to be operated. The trigger valve is made to communicate by operating. By such an action of the second control unit 92, the protective layer forming material is supplied to the roller 104 of the roller coating mechanism 90 while being maintained at an appropriate pressure and temperature, and as a result, an appropriate amount oozes out on the surface of the roller 104. .

  In this way, the protective layer forming material can be applied to the end of the automobile body 14. Moreover, the thickness of the protective layer forming material applied to the automobile body 14 can be adjusted by the pressure control by the regulator and the operation speed of the fifth to eighth robots 20e to 20h.

  As described above, in the present embodiment, the protective layer forming material is applied to the central portion of the automobile body 14 by the ejection mechanism 46 having excellent application efficiency, and then the end portion for which relatively high application accuracy is desired. Application is performed by a roller application mechanism 90. For this reason, it is possible to reliably avoid unpainted and uneven coating.

  Therefore, it is not necessary for the operator to perform the finish application manually. That is, according to the present embodiment, the process of applying the protective layer forming material can be automated, and the application quality can be made uniform. Moreover, since the process of applying the protective layer forming material by the operator is eliminated by automation, the number of processes can be reduced and the production efficiency can be improved. Furthermore, air conditioning equipment for workers can be omitted. Therefore, it is possible to save energy by reducing the electric power required for air conditioning, improve the environmental resistance, and reduce the operating cost of the factory.

  In addition, about the site | part which is the complicated part of the shape of the motor vehicle body 14, or a fine part and cannot be processed automatically with the 1st-8th robots 20a-20h, an operator should finish-paint. Also good. In this case, the number of uncoated areas of the protective layer forming material is reduced, so that the burden on the operator is also greatly reduced.

  The applied protective layer forming material forms a peelable protective layer by natural drying or drying while blowing air to protect the painted portion of the automobile body 14.

  The peelable protective layer formed of the protective layer forming material can protect the painted portion after the automobile body 14 is shipped, and can also protect the painted portion even in the factory, which is a substitute for the scratch cover. Therefore, a large number of scratch covers having different shapes for each vehicle type can be omitted.

  At the end of work or when maintaining the ejection mechanism 46, the MCV 72 is operated via the MCV switching electromagnetic valve 76 of the first composite circuit 50, thereby shutting off the switching valve 72a and communicating the switching valve 72b. Along with this, water is supplied from the first water conduit 30, and the MCV 72, the trigger valves 74a to 74c, and the gun tips 48a to 48e can be cleaned.

  Further, when maintaining the roller coating mechanism 90, the second composite circuit may be operated in the same manner as described above. Thereby, water is supplied from the second water conduit 100, and the MCV, the trigger valve, and each roller 104 can be cleaned.

  In the above-described embodiment, the protective layer forming material is applied via the ejection mechanism 46 at the first station 16 and applied via the roller application mechanism 90 at the second station 18. Application may be performed at the first station 16 via the roller application mechanism 90 and at the second station 18 via the ejection mechanism 46.

  Further, the intervals between the gun tips may be set to be equal, or the ejection pressure of the protective layer forming material may be set to be equal.

  Some bumpers of the automobile body 14 are colored and need not be painted, but the protective layer forming material may be applied to a portion other than the painted portion of such a bumper.

  The protective layer forming material coating method and system thereof according to the present invention are not limited to the above-described embodiments, and can of course take various configurations without departing from the gist of the present invention.

1 is an overall schematic perspective view of a protective layer forming material application system according to the present embodiment. It is a principal part schematic perspective view of the 1st station which comprises the protective layer formation material application system of FIG. FIG. 3 is a perspective view of a robot disposed at a first station in FIG. 2. It is a circuit diagram which shows the composite circuit of a hydraulic pressure and a pneumatic pressure. It is a principal part schematic perspective view of the 2nd station which comprises the protective layer formation material application system of FIG. FIG. 6 is a perspective view of a robot disposed at the second station in FIG. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Application | coating system 12 ... Conveyance line 14 ... Automobile body 16, 18 ... Station 20a-20h ... Robot 22, 92 ... Control part 24, 94 ... Tank 26, 96 ... Application material pipe line 28, 98 ... Water supply source 30, DESCRIPTION OF SYMBOLS 100 ... Water pipe line 32a-32h ... Robot controller 34, 102 ... Slide rail 36, 108 ... Pump 46 ... Ejection mechanism 48a-48e ... Gun tip 50a-50c ... Branch pipe 60 ... 1st composite circuit 62 ... Compressor 90 ... Roller application mechanism 104 ... Laura

Claims (9)

In both the first station and the second station, a protective layer forming material application method for applying a liquid protective layer forming material that functions as a peelable protective layer to the automobile body after drying,
In either one of the first station or the second station, the protective layer forming material is ejected from an ejection mechanism installed in an arm portion of a robot and applied to the automobile body,
In one of the remaining of the first station or the second station, the jetting mechanism is configured to rotate a roller on an automobile body while supplying the protective layer forming material to a roller coating mechanism installed in an arm portion of a robot. A method for applying a protective layer forming material, comprising applying the protective layer forming material to a portion other than the portion applied under the action of the above.   The coating method according to claim 1, wherein the protective layer forming material is applied to an end of an automobile body by the roller coating mechanism.   3. The coating method according to claim 2, wherein the protective layer forming material is applied by the ejection mechanism at the first station, and the protective layer forming material is applied by the roller application mechanism at the second station. A method for applying a protective layer forming material.   The coating method according to claim 1, wherein an acrylic copolymer is used as the protective layer forming material. A protective layer forming material application system that applies a liquid protective layer forming material that functions as a peelable protective layer after drying to an automobile body at both the first station and the second station,
A spray coating mechanism that is disposed at either one of the first station or the second station and sprays the protective layer forming material from a spray mechanism installed on an arm portion of a robot, and coats the car body.
By rotating the roller on the vehicle body while supplying the protective layer forming material to a roller disposed in one of the remaining of the first station or the second station and installed in the arm portion of the robot, A roller application mechanism for applying the protective layer forming material to a part other than the part applied under the action of the ejection mechanism;
A protective layer forming material coating system comprising:   6. The protective layer forming material coating system according to claim 5, wherein the jet coating mechanism is disposed at the first station, and the roller coating mechanism is disposed at the second station.   7. The protective layer forming material application system according to claim 5, wherein the roller is a material that absorbs and stores the protective layer forming material.   The system according to claim 5, wherein the ejection mechanism is capable of ejecting the protective layer forming material without accompanying air.   The system according to claim 5, further comprising a water supply line that supplies water to the ejection mechanism and the roller, and the ejection mechanism by supplying water to the ejection mechanism and the roller. And a protective layer forming material application system, wherein the roller is cleaned.

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