JP4603288B2 - Pressure roller coating apparatus and pressure roller coating method - Google Patents

Description

  The present invention relates to a pressure roller coating apparatus and a pressure roller coating method excellent in painting workability.

  It is widely practiced to use a roller coating machine to paint liquid paints on ordinary houses, buildings, fences, and inner and outer wall surfaces of ships. Roller coating is a method in which liquid paint is immersed in the porous portion of a rotatable roller, and the paint is transferred to the coated surface while rotating it on the surface of the coated object. Compared to the above, since the paint is less scattered, the working environment is good and the coating efficiency is excellent.

  However, as the coating area increases, the number of times that the paint penetrates into the porous portion of the roller increases, which increases labor and lowers the painting efficiency. It has defects such as the possibility of contaminating the surroundings.

  In view of such a current situation, Patent Document 1 proposes a coating method using a pressure-type roller coating machine that pressurizes a liquid tank by pressurizing a sealed tank. However, as shown in FIG. 7, the roller coating machine used in the method is generally provided with a metal high-pressure needle valve 12, and a metal hollow structure paint supply pipe / support portion 13 is provided. The weight (the total weight of the roller pile part, the core part, the support part, and the needle valve) is, for example, 700 g or more, and the weight is often heavy as a whole.

  According to the roller coating machine, the control of the discharge amount of the liquid paint fed under pressure is adjusted by the trigger of the needle valve 12 to obtain a good coating finish. Since it is on the hand side (the gripping part of the roller coating device), the feeling of weight is increased, and the roller coating workability is sometimes poor, for example, the coating work takes a long time.

JP 2002-119909 A

  An object of the present invention is to provide a pressure roller coating apparatus and a pressure roller coating method having good coating workability.

As a result of earnest research to solve the above-mentioned problems, the present inventor has provided an opening / closing valve provided in a paint supply pipe for connecting a paint supply body and a specific roller core to a gripping part. It has been found that the above-mentioned problems can be solved by a pressure roller coating apparatus that supplies liquid paint from a paint supply body to a roller coating machine under the control of a switch, and the present invention has been completed.
That is, the present invention
1. A paint supply body for supplying liquid paint to a roller coating machine, a roller coating machine including a roller having a built-in core, a support section, a gripping section, and a switch disposed in the gripping section; A paint supply pipe for connecting the roller core of the roller coating machine, and an on-off valve disposed in the paint supply pipe and controlled by the switch, the core built in the roller part, inside a hollow polygonal column, have a plurality of paint flow straightening apertures, the paint rectification holes, against the core surface paint rectification holes are formed, 10 to 60 ° to the central axis of the roller A pressure roller coating apparatus characterized by having an inclination angle within the range of
2.
2. The pressure roller coating apparatus according to item 1, wherein the distance between the on-off valve and the roller coating machine is within a range of 50 to 300 cm.
3.
The pressure roller coating apparatus according to item 1 or 2, wherein the roller coating machine has a weight of 200 to 600 g.
4).
Applying the liquid paint by controlling the on-off valve provided in the paint supply pipe by the switch provided in the grip using the pressure roller coating apparatus according to any one of items 1 to 3. The pressure roller painting method, characterized by
About.

  According to the pressure roller coating apparatus of the present invention, a heavy on-off valve is disposed in the paint supply pipe that connects the paint supply body and the roller core, and the on-off valve is controlled by a switch disposed on the grip portion. As a result, the weight of the roller coating machine can be reduced. As a result, the workability of the coating is greatly improved, and there is little feeling of fatigue even when working for a long time. Further, since the discharge amount can be easily controlled by the operator, the operability is very good.

  Hereinafter, the present invention will be specifically described.

  In the present invention, the coating material supply body is not limited as long as it has a mechanism for pumping liquid coating material. For example, the coating material is released by pressurizing a pressure-resistant sealed tank by an air supply body such as an air compressor. Examples include a pressure tank type and a pump type that supplies paint to a coating machine by a pump having a paint container containing paint.

  As the paint supply body in the present invention, the pressure tank type pressurized by the air supply body includes a pressure tank having a paint inflow port, an air supply port, and a paint discharge port. The filling operation of the paint into the pressure tank may be performed by transferring a commercially available paint at the painting site. However, it is desirable that the paint produced by the paint maker is filled from the paint inlet by the paint maker. Thereby, the process of preparing these paints at the painting work site is omitted, and the man-hours can be further reduced. In addition, waste disposal work such as paint cans at the painting work site can be eliminated.

  The pressure tank is pressurized when air is injected from an air supply port, and the paint is sent out from the paint discharge port. Further, the pressure tank may be provided with a liquid level sensor at the bottom of the inner wall surface as required. When the remaining amount of the paint is reduced and the liquid level sensor provided at the bottom of the inner wall surface is exposed to air, the sensor is detected, and it is possible to know the replenishment timing of the paint.

  The pressure in the pressure tank is 0.1 MPa to 3 MPa, preferably 0.1 MPa to 0.5 MPa. When the pressure is lower than 0.1 MPa, the discharge amount of the paint is decreased. On the other hand, when the pressure is higher than 3 MPa, the balance between the supply amount of the paint and the transfer amount is lost, and dripping and scattering are liable to occur.

  On the other hand, in the present invention, a pump-type paint supplier can also be used. Examples of the pump-type paint supplier include a diaphragm pump, a plunger pump, a snake pump, a tubing pump, and the like.

  The paint supply pipe that connects the paint supply body and the roller core is hollow, and one end thereof is connected to the paint supply body, and the other end is connected to the roller core. In the method of the present invention, a paint supply pipe that is light in weight and excellent in flexibility can be suitably used from the viewpoint of painting workability. In addition, the paint supply pipe is composed of a paint pressure supply pipe (I) with high pressure resistance connecting the paint supply body to the on-off valve and a paint supply pipe (II) with low pressure resistance connecting the on-off valve to the roller core. You can also

  In the paint supply pipe (I), since a high pressure for conveying the paint may be applied, it is desirable that the pressure resistance of the pipe (I) is high. Desirably, the inner diameter is in the range of 5 to 13 mm, and the outer diameter is in the range of 7 to 25 mm. Examples of the material include resins such as nylon, urethane resin, fluororesin, vinyl resin, and vinyl chloride resin, and may be reinforced with a steel wire or nylon thread.

  On the other hand, since the pressure applied from the on-off valve to the roller core in the paint supply pipe (II) is low, the pressure resistance of the pipe (II) may be low. The pressure resistance is desirably 10 MPa or less, preferably 0.3 to 2.5 MPa, the inner diameter is desirably 4 to 13 mm, and the outer diameter is desirably 5 to 20 mm. Examples of the material include nylon, urethane resin, fluororesin, vinyl resin, vinyl chloride resin, and the like, and vinyl chloride resin is suitable.

  As the liquid paint, those known per se are used and can be arbitrarily selected depending on the purpose. Specific examples include water-based, organic solvent-based, and solvent-free paints containing acrylic resin, polyester resin, alkyd resin, polyurethane resin, etc. as a base resin. These include room temperature drying, room temperature curing, polymerization reaction. It is classified into a curable type and any of them can be applied. Furthermore, the liquid paint can form a colorless and transparent, colored and transparent coating film. Here, “coloring” includes solid color tone, metallic tone, light interference tone, and the like.

  In the above liquid paint, when a pressure tank type paint supplier is used, the viscosity is preferably 200 poise / 20 ° C. or less, particularly preferably in the range of 10 to 70 poise / 20 ° C. When the body is used, it is desirable that the viscosity of the liquid paint is 500 poise / 20 ° C. or less, particularly 10 to 400 poise / 20 ° C.

  In this specification, the viscosity of the liquid paint is a value measured at 60 rpm with a B-type viscometer after adjusting the sample to 20 ° C.

  In the case where the liquid paint is a water-based paint or an organic solvent-based paint, the solid content of the liquid paint is preferably 1 to 95% by weight, preferably 40 to 80% by weight.

  In the present invention, the roller coating machine immerses the liquid paint in the rotatable cylindrical porous portion of the roller part, and transfers the paint to the surface to be coated while rotating it on the surface of the object to be coated. It is a coating machine to perform, and includes a roller part, a support part, a grip part, and a switch disposed on the grip part.

  A roller part is located in the front-end | tip part of a roller coating machine, and is comprised so that a core part may be incorporated and this core part may be covered with the cylindrical porous part which can rotate.

  The core part is attached to the hollow inside of the cylindrical porous part, and conventionally known ones can be used. Although there is no restriction | limiting as a shape, Polygonal pillars, such as a cylinder, a triangular prism, and a square prism, are mentioned, The shape which combined these may be sufficient, but it is preferable that the inside is hollow. In particular, a polygonal column is desirable because the liquid paint oozes out into the porous portion, and the thickness is preferably such that the outer twill of the polygonal column contacts the hollow inner wall of the cylindrical porous portion. As a result, a substantially “kamaboko-like” hollow portion is formed between the hollow inner wall surface and the outer surface portion of the polygonal column. And it is suitable to provide a plurality of paint rectifying holes in the surface portion of the core portion (there are three surfaces if triangular prisms).

  The paint rectifying hole is provided to adjust the liquid paint pumped from the paint supply body so that the liquid paint oozes uniformly from the cylindrical porous portion of the roller portion. Moreover, the hollow part of the said core part is provided as a coating material distribution channel for conveying a liquid coating material inside a core, and it is desirable that it is cylindrical as a shape.

  The inner diameter of the core part is preferably 2 to 5 cm and the length is preferably 5 to 30 cm.

  The liquid paint that has been pumped in the present invention flows from the paint inflow part of the core part of the roller part into the paint flow path inside the core, and then comes out from the paint rectifying hole communicating from the inside of the core to the outside, and is cylindrical. It reaches a “kamaboko-like” hollow portion formed between the hollow inner wall surface of the porous portion and the outer surface portion of the core, and then oozes out through the cylindrical porous portion.

  The paint rectifying holes provided in the core portion penetrate so as to communicate the inside and outside of the core, and a plurality, preferably 2 to 10, particularly preferably about 2 to 5 are desired per core. . The inner diameter is suitably about 0.5 to 10 mm, particularly about 1 to 8 mm. Further, when a plurality of paint rectifying holes are provided in a single core, the inner diameter thereof may be the same, but the inner diameter is particularly small in the vicinity of the entrance into which the liquid paint flows (for example, 0.5 to 4 mm, preferably 1 to 3 mm), and increasing the inner diameter at the farthest position (for example, 6 to 10 mm, particularly 7 to 8 mm) is preferable because the amount of liquid paint leaching from the cylindrical porous portion to the outside tends to be uniform. is there. One or more paint rectifying holes may be provided on each surface of the core.

  Further, in the present invention, in order to allow the liquid paint that has been pumped to ooze out from any part of the porous part of the roller coating machine with an appropriate balance, and to be uniformly transferred to the object to be coated, It is preferable that one or more paint rectifying holes provided in the core portion are provided in the vicinity of the paint inlet and in the innermost portion, respectively, and further, if necessary, one or more in the central portion of the core portion at equal intervals. If the inner diameter of the rectifying hole in the vicinity of the paint entrance is 1, the inner diameter of the rectifying hole in the inner part may be increased by about 2 to 5 times.

  In the present invention, the direction of the paint rectifying hole may be perpendicular to the surface portion of the core portion (there are three surfaces if triangular prisms) or may have an inclination angle. It is preferably within a range of 10 ° to 90 ° with respect to a core surface portion provided with the paint rectifying hole or a tangential plane having the paint rectifying hole as a contact, and in particular, an angle within a range of 10 to 60 °. It is desirable to have

  Here, the core surface portion in which the paint rectifying holes are provided means the flat surface when the surface in which the paint rectifying holes are provided is a flat surface. Further, the tangential plane having the paint rectifying hole as a contact means a plane having the paint rectifying hole on the curved surface as a contact when the paint rectifying hole is provided on the curved surface.

  When the paint flow straightening hole has an inclination angle, the liquid paint can be uniformly and efficiently transferred from the paint flow path inside the core to the porous portion.

  In this invention, the nozzle which can adjust the flow direction of a liquid coating material can also be attached to the said coating material rectification | straightening hole.

  Examples of the cylindrical porous part include a wool roller, a mastic roller, etc., in which a porous body such as wool, chemical fiber, or sponge is wound around the outer surface of a cylindrical roller such as a paper tube. It has a porous structure so that the liquid paint is soaked.

  As the support portion for supporting the roller portion, a conventionally known one can be used, and a tubular portion having a hollow inside and also serving as a paint supply pipe can be used.

  The gripping part in the present invention may include a support part, a paint supply pipe and an air pipe, which will be described later, as long as it has a structure including a switch. There are no particular restrictions on the material, shape, etc. of the gripping part, and a lightweight material is suitable for positioning the center of gravity in the vicinity of the roller part side during painting, and resin is particularly preferred.

  The switch is provided to remotely operate an on-off valve, which will be described later. Examples of the structure of the switch include a push button type and a pin type that emit an electric signal and an air signal. It is also possible to operate the on-off valve by converting it into an electric or air signal.

  In addition, the gripping portion can be provided with a stain prevention plate for receiving the rebound paint as necessary.

  The on-off valve is provided to adjust the amount of paint supplied to the roller coating machine. In the present invention, the on-off valve is disposed on the paint supply pipe that connects the gripping part and the paint supply body. Features.

  The on-off valve may be either an air operated valve that operates by receiving an air signal or a solenoid valve that operates by receiving an electrical signal by a remote control switch. Further, it may be of a type that operates by converting an operator's voice or the like into an electric or air signal.

  Further, examples of the structure of the on-off valve include a needle type, a ball type, a butterfly type, and the like, and there is no particular limitation as long as it is a structure that can control the liquid, but a needle type is preferable.

  In the present invention, the installation position of the on-off valve is not particularly limited as long as it is on the paint supply pipe, but the distance between the on-off valve and the roller coating machine is in the range of 50 to 300 cm, preferably 100 to 200 cm. It is desirable that

  If the distance between the on-off valve and the roller coating machine is less than 50 cm, the painting operation may be difficult. In addition, there is a tendency for the amount of paint to be discharged to decrease.

  The on-off valve disposed in the paint supply pipe can also be fixed to the body of the paint worker, a scaffold at the work site, or the like.

  In the present invention, it becomes possible to reduce the weight of the gripping part by arranging a heavy on-off valve on the paint supply pipe, and the center of gravity of the roller coating machine at the time of painting is moved from the gripping part to the roller part side, In addition, it is possible to reduce the weight of the entire roller coating machine. Specifically, the total weight of the switches disposed on the roller unit, the support unit, the gripping unit, and the gripping unit can be 200 to 600 g, particularly about 300 to 500 g.

  The method according to the present invention is characterized in that the liquid paint is applied by controlling the on-off valve provided in the paint supply pipe by the switch provided in the grip portion using the above-mentioned pressure roller coating apparatus. Is the method.

  In the coating method of the present invention, the liquid paint pumped from the paint supply body passes through the paint supply pipe and reaches the on-off valve. The on-off valve is opened and closed by a remote switch disposed in the gripping part of the roller coating machine, and the paint is supplied to the roller part.

  The coating material supplied to the roller core as described above oozes from the core portion to the outer surface of the cylindrical porous portion through the paint rectifying hole, and contacts the cylindrical porous portion with the surface to be coated. By rotating while being applied, the liquid paint in the porous portion is transferred to the surface to be coated, and coating is performed.

  The discharge amount of the liquid paint onto the surface to be coated is not particularly limited, and can be arbitrarily selected according to the type of paint supply and the amount of application.

For example, when a coating operation with a coating amount of 0.15 Kg / m ² is performed by a pressure tank method, it is desirable that the paint discharge amount be within a range of 0.15 to 0.6 Kg / min, and a coating method with a pump method. When performing a coating operation of 1.0 kg / m ² , it is desirable to adjust the discharge amount within the range of 1.0 to 2.0 kg / min.

  The objects to be coated are not particularly limited and can be applied to objects that can be roller-painted. For example, ordinary houses, buildings, roofs of buildings, fences, outer walls, inner walls, ceilings, ships, bridges, civil engineering It can be applied to related paintings. In addition to the solid color tone, metallic tone, light interference tone, etc., the coating film to be finished includes a concavo-convex pattern, a yuzu skin pattern, and the like.

  FIG. 1 is a schematic diagram showing a roller coating machine and a coating apparatus using the roller coating machine according to an embodiment of the present invention, and FIG. 2 is a schematic diagram showing an example of a paint supply body used in the present invention. 3 is a schematic diagram showing a roller coating apparatus according to another embodiment of the present invention, and FIG. 4 is a schematic diagram of a perspective view showing an example of a core part of a roller coating machine used in the present invention. 5 is a schematic diagram of a side view showing an example of a core part of a roller coating machine used in the present invention, FIG. 6 is a schematic diagram illustrating an example of a paint rectifying hole provided in the core part, FIG. 7 is a schematic view showing an example of a conventional pressure-feed type roller coating machine.

  “Parts” and “%” are both based on weight.

  In FIG. 1, the roller coating machine has a cylindrical cylindrical roller pile 1 in which a triangular prism core 2 is mounted. Of the three surfaces of the core, the first surface has a 2 mm diameter paint rectifying hole. However, a paint rectifying hole with a diameter of 3.5 mm passes through the second surface, and one paint rectifying hole with a diameter of 5 mm passes through the third surface. Of these paint rectifying holes, the first surface is a paint rectifying hole. The third surface is closest to the inflow portion, the third surface is located at the farthest portion, and the second surface is in the middle thereof, and both are provided at equal intervals. Furthermore, nozzles (not shown) through which the liquid paint flows out in the direction of the center of the core are attached to the rectifying holes on the first surface and the third surface, respectively. And the outer twill of the triangular prism is in contact with the hollow inner wall of the cylindrical porous portion, and a kamaboko-shaped hollow portion is formed.

  A resin paint supply pipe 4 communicates from the core portion 2 via the connection portion 3 to the metal paint tank 7 via the resin grip portion 9 and the air operated valve 6. The paint supply pipe 4 is made of a soft vinyl chloride resin reinforced with polyester yarn, and has a strength of an inner diameter of 6 mm, an outer diameter of 11 mm, a working pressure of 1.0 MPa, and a bursting pressure of 7.3 MPa.

  The paint supply pipe 4 is provided with an air operated valve 6, and the distance between the tip of the grip portion 9 on the side close to the paint supply pipe 4 and the air operated valve 6 is 1500 mm.

  On the other hand, a switch 5 for controlling the air operated valve 6 is disposed in the grip 9, and an air pipe 10 ′ communicates from the switch 5 to the air operated valve 6. The weight of the roller coating machine (the total weight of the roller pile part 1, the core part 2, the support part 8, the connection part 3, the grip part 9 and the switch 5) is about 400 g, and the total weight of the roller pile part 1 and the core part is Although it is about 150g, in the case of actual painting, the roller pile part 1 and the core part are in a state containing paint, and the weight is about 300g. It is in.

  An acrylic resin water-based white paint having a viscosity of 30 poise / 20 ° C. and a solid content of 40% is placed in a paint tank 7 having an internal volume of about 18 liters, sealed, the air operated valve 6 is “closed”, and the air compressor 11 The inside of the paint tank 7 was pressurized to 0.3 to 0.7 MPa. In a pressurized state of 0.3 to 0.7 MPa, the paint reaches the air operated valve 6, and the pressurized air reaches the switch 5 through the air pipe 10 ′.

  When the switch 5 is turned on, the pressurized air passes through the air pipe 10 ′, reaches the air operated valve 6, opens the air operated valve 6, and the paint passes through the paint supply pipe 4 and the connection portion 3. It flows into the core part 2 and is pumped from the inside of the core through the three rectifying holes toward the center of the semi-cylindrical hollow part, and then the liquid paint oozes from the outside of the roller pile part 1. On the other hand, when the switch 5 is turned OFF, the pressurized air is discharged by the switch 5, the pressurized air in the air pipe 10 'decreases, the air operated valve 6 is "closed", and the paint supply is stopped. In this way, while controlling the discharge amount with the switch 5, the roller pile portion 1 was brought into contact with the slate plate and rotated for coating. Because it is light in weight and the center of gravity is near the roller, and the discharge amount can be easily adjusted, the degree of fatigue during painting is reduced, the workability of painting is improved, and the finish of painting is also good.

  An example of the paint tank 7 is shown in FIG. In FIG. 2, a paint tank 7 has a liquid level sensor 7a at the bottom of the inner wall surface of the tank, a paint discharge port 7b connected to the paint supply pipe 4 at the bottom, a paint inlet 7c with an upper lid for filling the paint at the top, An air supply port 7d is provided. Ball valves 7e are attached to the paint supply pipe 4 and the air pipe 10, respectively, so that the structure can be opened and closed. The paint viscosity and filling operations are performed by a paint manufacturer, and the paint tank 7 filled with the viscosity-adjusted paint can be carried into the painting work site.

  FIG. 3 is a schematic view showing a roller coating apparatus which is another embodiment of the present invention. In FIG. 3, the core 21 shown in FIGS. 4 to 6 is used as the core built in the roller portion, the plunger pump 71 is used as the paint supply body, and the paint supply for connecting the plunger pump 71 and the air operated valve 6 is performed. As the pipe, a pressure-resistant paint supply pipe 4 ′ having an inner diameter of 6.35 mm, an outer diameter of 10 mm, and a pressure resistance of about 22 MPa is used. The plunger pump 71 has a viscosity of 300 poise / 20 ° C. and a solid content of 78%. The structure is the same as that of the first embodiment except that an acrylic resin water-based white paint is accommodated. The air operated valve 6 was set to “closed”, and the inside of the air pipes 10 and 10 ′ was pressurized to 0.3 to 0.7 MPa by the air compressor 11. In the pressurized state, the paint reaches the air operated valve 6, and the pressurized air reaches the switch 5 through the air pipe 10 '. The plunger pump 71 was turned on, and the air operated valve 6 was controlled by the switch 5 in the same manner as in the first embodiment to perform painting. The discharge amount can be adjusted easily, so the fatigue level during painting is reduced and painting workability is improved. In addition, the paint could be transferred uniformly and the finish of painting was good.

  FIG. 4 is a schematic diagram of a perspective view of the core portion 21. The resin-made core portion 21 has a shape in which two cylinders are connected to both ends of a triangular prism.

  FIG. 5 is a schematic diagram of a side view of the core portion 21, and is hollow with a cylindrical hole having an inner diameter of about 7 mm. Here, each surface of the triangular prism in the core portion 21 is defined as an A surface, a B surface, and a C surface.

  FIG. 6 is a view for explaining the positions and directions of the paint rectifying holes provided on the respective faces of the triangular prisms of the core portion 21. 6A is a front view of the A surface, the B surface, and the C surface, and FIG. 6B is a core portion when the A surface, the B surface, and the C surface are placed in a horizontal direction. FIG. Specifically, the upper stage of FIG. 6B is left stationary so that the A plane is in the horizontal direction, the middle stage is stationary so that the B plane is in the horizontal direction, and the lower stage is the C plane. Is placed in a horizontal direction. All the paint rectifying holes penetrate to the paint distribution path inside the core in a direction of 30 ° with respect to each surface where the paint rectifying holes are provided. The A surface is provided with paint rectifying holes with an inner diameter of 2 mm at two locations symmetrically with respect to the center of the A surface, and the B surface is centered at a position about 10 mm from one end of the B surface (the one far from the paint inflow portion). One paint rectifying hole with an inner diameter of 2 mm is provided, and a C paint face is provided with a paint flow hole with an inner diameter of 2 mm in the center at a position about 10 mm from one end of the C face (the one closer to the paint inflow part). The core 21 has paint rectifying holes having a total of four inclination angles.

It is the schematic showing the roller coating machine which is one Example of this invention, and the coating apparatus using the same. It is the schematic showing an example of the coating material supply body used for this invention. It is the schematic showing the roller coating apparatus which is another one Example of this invention. It is the schematic of the perspective view showing an example of the core part of the roller coating machine used for this invention. It is the schematic of the side view showing an example of the core part of the roller coating machine used for this invention. It is the schematic explaining an example of the paint rectification | straightening hole provided in the core part. It is the schematic showing an example of the conventional pressure-feed type roller coating apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roller pile 2 Core 21 Core 2a Paint rectification hole 3 Connection part 4 Paint supply pipe 4 'Paint supply pipe (pressure resistance)
DESCRIPTION OF SYMBOLS 5 Switch 6 Air operated valve 7 Paint tank 7a Liquid level sensor 7b Paint discharge port 7c Paint inflow port 7d Air supply port 7e Ball valve 71 Plunger pump 8 Supporting part 9 Grasping part 10 Air pipe 10 'Air pipe 11 Compressor 12 Needle valve 13 Paint Supply pipe and support section

Claims (4)

A paint supply body for supplying liquid paint to a roller coating machine, a roller coating machine including a roller having a core, a support section, a gripping section, and a switch disposed in the gripping section; A paint supply pipe for connecting the roller core of the roller coating machine, and an on-off valve disposed in the paint supply pipe and controlled by the switch, and the core built in the roller part, The inside is a hollow polygonal column and has a plurality of paint rectifying holes, and the paint rectifying holes are 10 to 60 ° in the central axis direction of the roller with respect to the core surface on which the paint rectifying holes are provided. A pressure roller coating apparatus having an inclination angle within a range of. The pressure roller coating apparatus according to claim 1, wherein a distance between the on-off valve and the roller coating machine is in a range of 50 to 300 cm. The pressure roller coating apparatus according to claim 1 or 2, wherein the roller coating machine has a weight of 200 to 600 g. Applying a liquid paint by controlling an on-off valve provided in a paint supply pipe by a switch provided in a grip using the pressure roller coating apparatus according to any one of claims 1 to 3. A pressure roller coating method characterized by

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