JP2010104872A - Coater and coating method at building site - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coater and a coating method capable of uniform coating with little unevenness in film thickness when a worker applies a thin film onto outside walls of a building at a building site. <P>SOLUTION: The coater 1 is for coating an outside wall W of a building and includes a spray gun 3 having a coating discharge outlet 3a spraying a coating P and at least two laser pointers 7 mounted on the spray gun 3 and radiating laser beams B in the spraying direction D for the coating P. The coater 1 radiates laser beams B from the laser pointers 7 so as to enable visual check of the coating distance L by causing the laser beams B to intersect with one another on the surface of the outside wall Wa of the building and thereby keep constant the coating distance L between the outside wall W of the building and the spray gun 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a coating technique for forming a coating film on the surface of an outer wall of a building such as a house or a building by a human hand at the site.

  Proposal and practical application of various performances such as the purpose, design, and aesthetics of the coating that covers the surface of architectural exterior walls such as houses and buildings by protecting the base material from heat and light. Has been.

  In recent years, many antifouling paints such as highly weather-resistant paints and photocatalyst paints that increase the inorganic components of the paints as functional paints have been proposed and put into practical use. Coatings and photocatalyst coatings with increased inorganic components do not generate cracks after coating, so it is necessary to reduce the film thickness of the coating film, and thin film coating technology is required. The thin film here means that the film thickness is about 0.1 to several μm. When coating various functional coatings with thin films, it is possible to apply a uniform and thin film by using a coating machine and precisely controlling the coating conditions. It is not easy to apply thick.

When coating with a film thickness of several hundreds of μm by manual painting at a construction site, there is almost no problem in appearance even if a film thickness unevenness of several μm occurs. This is a problem in appearance. Therefore, a method of coating with a uniform and thin film has been proposed (see Patent Document 1 or 2). In addition, as a method for coating various substrates, spray coating, brush coating, roll coating, and other coating methods are used, but spray coating is considered suitable for coating on high-design outer walls. .
JP 2003-164793 A JP 2006-122757 A

  However, according to the method described in Patent Document 1, film thickness unevenness may occur on the outer wall of a complicated shape such as a highly designed outer wall, which may cause poor appearance. On the other hand, the method described in Patent Document 2 is not limited to paints using an organic solvent, and particularly requires consideration for the environment.

  The present invention has been made in view of such problems, and it is intended to provide a coating machine and a coating method capable of coating with a uniform and less film thickness unevenness when a person applies a thin film on an exterior wall of a building on site. Objective.

  In order to solve the above-mentioned problems, a coating machine according to the present invention is a coating machine used for painting an outer wall of a building, and is attached to a spray gun having a paint discharge port for spraying paint, And at least two laser beam irradiation units that irradiate a laser beam in the direction of spraying the paint, and the laser beam irradiation unit has a surface of the building outer wall in order to keep a coating distance between the building outer wall and the spray gun constant. The laser beam is irradiated so that the laser beam intersects and the coating distance can be visually confirmed.

  According to the present invention, when a person paints a thin film on an exterior wall of a building at a construction site, it becomes easy to perform the coating while keeping the distance between the exterior wall of the building and the spray gun constant, and uniform coating with less film thickness unevenness is possible. It becomes.

  Moreover, this invention is the coating method in the construction site characterized by using said coating machine.

  According to the present invention, when a person paints a thin film on the building outer wall at a building site, the coating can be performed while keeping the distance between the building outer wall and the spray gun constant, and uniform coating with less film thickness unevenness is possible. Become.

  Furthermore, in the above coating method, it is preferable to use a device that emits sound at regular intervals in order to keep the spray gun operating speed constant. According to the present invention, the operation speed of the spray gun can be easily maintained at a constant level, and coating with uniform and less film thickness unevenness is possible.

  Furthermore, it is preferable that the device for transmitting sound at regular intervals is a metronome. By relying on the sound emitted from the metronome, you can easily keep the spray gun operating at a constant speed.

  Furthermore, the metronome is preferably an ear-mounted metronome. Since it can be worn on the ear of the worker, it is convenient to carry, and even if there is a variety of noises, the sound of the metronome can be clearly heard.

  Furthermore, it is preferable that the coating method according to the present invention is characterized in that a photocatalyst paint is applied to the building outer wall. The photocatalyst paint does not generate cracks after coating, so it is necessary to reduce the film thickness of the coating film. However, according to the present invention, even a photocatalyst paint can be applied with a thin film easily.

  According to the present invention, when a person paints a thin film on the building outer wall at a building site, the coating can be performed while keeping the distance between the building outer wall and the spray gun constant, and uniform coating with less film thickness unevenness is possible. Become.

  Embodiments of the present invention will be described below with reference to the drawings. The coating machine 1 includes a spray gun 3 and a two-point laser beam unit 5.

  As the spray gun 3, for example, Anest Iwata spray gun, Meiji spray gun, Devilbis spray gun or the like can be applied, and a paint discharge port 3a for injecting paint P is formed at the tip of the spray gun 3. Yes.

  The two-point laser beam unit 5 is a unit equipped with two small laser pointers (laser beam irradiation units) 7. Each of the laser pointers 7 has a structure that can be independently changed in the up / down / left / right direction, or can be fixed at a predetermined position or orientation.

  The two-point laser beam unit 5 is attached to the spray gun 3 with a small laser pointer 7 facing the spray direction D of the paint P. After aligning the distance between the spray gun 3 and the outer wall surface Wf with the coating distance L, the laser pointers 7 of the two-point laser beam unit 5 are moved up and down and left and right, and the laser beams B emitted from the laser pointers 7 are Adjustment is made so that two points intersect at the outer wall surface Wf. As a result, the distance between the intersection of the two points and the spray gun 3 is the coating distance L.

  By performing the above-described setting, the laser beam B does not intersect on the outer wall surface Wf even when the spray gun 3 is moved closer or further away, and it can be visually confirmed that the coating distance L has shifted. That is, by setting the point where the two laser beams B intersect on the outer wall surface Wf, the coating distance L can be easily confirmed visually and can be easily maintained constant.

  The color of the laser beam B is not particularly limited, and may be red which is generally used (wavelength of about 630 to 670 nm) or green which is frequently used (wavelength of 532 nm).

  The manner in which the two-point laser beam unit 5 is attached to the spray gun 3 is not particularly limited, and it may be attached by welding directly to the spray gun 3 or in a removable state. Absent.

  Next, a coating method using the coating machine 1 will be described. When a worker paints a thin film on the building outer wall W at the construction site, the direction and position of the laser beam B irradiated with the laser pointer 7 is adjusted according to the coating distance L, and the position where the two points intersect is Fit to the surface. Then, the coating material P is sprayed from the coating material discharge outlet 3a, and the thin film coating to the building outer wall W is started. Here, the worker uses a device that emits sound at regular intervals in order to keep the operation speed of the spray gun 3 constant. For example, a metronome is used as a device that transmits sound at regular intervals.

  A metronome is a tool used to squeeze sound at regular intervals to synchronize the tempo. The numerical value of the tempo is determined by the number of times the tempo is cut per minute. For example, if the tempo is 100, the sound is cut 100 times per minute. The worker (person) can keep the operation speed of the spray gun 3 constant by relying on the sound engraved at the constant tempo.

  The constant tempo is not limited to tempo = 100. As described above, since the number of ticks per minute is tempo, for example, if tempo = 60, a sound is engraved once per second.

  The metronome is preferably an ear-mounted type, and the ear-mounted metronome is not particularly limited as long as it is commercially available. For example, KORG MetroGnome MM-1 or MM-2 is available.

  When painting at a construction site, it is inconvenient to carry if the metronome is not attached to the body of the worker (person) itself, and there is a possibility that the noise engraved by the metronome may not be heard due to various noises. However, an ear-mounted metronome is convenient to carry because it is attached to the worker's (person) 's own body, and there is no problem in workability. Therefore, it is preferable.

  Thin film coating refers to coating after coating so that the film thickness of the dried coating film is about 0.1 to several μm. By precisely controlling the coating conditions using the coating machine 1, it is possible to apply a uniform and thin film. The coating conditions are exactly to keep the coating distance L constant and to keep the operation speed of the spray gun 3 constant. By using the coating machine 1 according to the present embodiment, it is easy to make the coating distance L constant. Furthermore, by using the ear-mounted metronome at the same time as the coating machine 1, the operating speed of the spray gun 3 Can be made constant, and thin film coating with little film thickness unevenness can be performed by the hand of an operator (person).

  The architectural outer wall W as a base is not particularly limited, and various base materials can be used. For example, a metal substrate, a glass substrate, an enamel substrate, an inorganic building material such as cement or gypsum, an inorganic substrate such as ceramic, and at least one layer of an inorganic coating film on the surface of any of these substrates, Examples thereof also include a coated base material having at least one organic coating film.

  Although it does not specifically limit as an organic coating film which comprises said coating base material, For example, organic resin, such as an acrylic type, a polyester type, an epoxy type, a urethane type, an acrylic silicone type, a melamine type, a fluorine type The paint P containing can be mentioned.

  Although it does not specifically limit as an inorganic coating film which comprises said coating base material, For example, the coating material P containing inorganic resins, such as a silicone resin type and a polysilazane type, can be mentioned.

  The coating P to be coated with a thin film on the above-mentioned coating substrate is not particularly limited, and organic coating films such as acrylic, polyester, epoxy, urethane, acrylic silicone, melamine, and fluorine, Examples include inorganic coatings such as silicone resin and polysilazane, and photocatalytic coatings. In particular, it is considered that the coating method of the present invention is suitable for a coating film in which cracks or the like tend to occur when the coating film is thick, such as an acrylic silicone organic coating film containing an inorganic component in the coating film, an inorganic coating film, or a photocatalytic coating film.

  The shape of the substrate is not particularly limited, and may be a smooth design plate such as glass or metal curtain wall or a high design plate such as a house siding plate.

  EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention concretely, this invention is not limited to the following Example.

  The aluminum substrate was selected for the base material used for an Example and a comparative example. This is because SEM (JEOL datum Co., Ltd. scanning electron microscope JSM-5600LV) is used as a method for confirming the film thickness after coating. did.

  As a coating material to be applied to the base material, an acrylic paint (“White White for Aqueous Wall” made by Asahi Pen) was used.

  A paint obtained by diluting a water-based acrylic silicone-based paint (water-based acrylic silicone “Polydurex G633” manufactured by Asahi Kasei Chemicals Co., Ltd.) to about 5% with water was used as a paint for thin film coating on the base coating film.

  The low pressure atomizing spray gun “LPH-100-124LVS” manufactured by Anest Iwata Co., Ltd. was selected as the spray gun used for painting.

  As the ear-mounted metronome, “Micrometronome MM-2” manufactured by Korg was used.

  A predetermined amount of acrylic paint was applied to an aluminum plate (300 × 300 mm), and dried for about 2 hours in an environment where the temperature was 23 ° C. and the humidity was 50%. After drying, a total of six acrylic paint-coated aluminum plates fixed vertically in a range of 600 × 600 mm was used as a painted outer wall (outer building wall).

[Example 1]
The spray gun “LPH-100-124LVS” was equipped with a two-point crossing laser beam unit for visual recognition of the distance, and the coating distance was adjusted to 20 cm. Thereafter, the spray gun was adjusted so that the spray pattern opening was 20 cm, the paint discharge rate was 40 g / min, and the local air pressure was 0.1 MPa, and coating was performed so that the film thickness was about 1 μm. After coating, it was dried for about 1 hour in an environment of an air temperature of 23 ° C. and a humidity of 50%, 10 arbitrary locations on the coated plate were selected, and the film thickness was measured by SEM. As a result, the film thickness was as set, the standard deviation was 0.31 as shown in Table 1, and the film thickness unevenness was small. In addition, Table 1 is a table | surface which shows the film thickness measurement result of an Example and a comparative example.

[Example 2]
Using a spray gun equipped with a two-point crossing laser beam unit for visual recognition of distance and an ear-mounted metronome “Micro Metronome MM-2”, adjusting the coating distance to 20 cm, the spray gun operating speed is 30 cm / The operation was performed in seconds (tempo was set to 60), and coating was performed so that the film thickness was about 1 μm. After coating, it was dried for about 1 hour in an environment of an air temperature of 23 ° C. and a humidity of 50%, 10 arbitrary locations on the coated plate were selected, and the film thickness was measured by SEM. As a result, the film thickness was as set, the standard deviation was 0.10, and the film thickness unevenness was even smaller.

[Example 3]
A photocatalyst is applied to 100 parts of a paint obtained by diluting a water-based acrylic silicone-based paint (Asahi Kasei Chemicals Co., Ltd. water-based acrylic silicone “Polydurex G633”) to about 5% with water as a paint to be applied as a thin film on an undercoat. Using a paint added with 5 parts of titanium oxide (photocatalyst titanium oxide “ST-01” manufactured by Ishihara Sangyo Co., Ltd.), a coating film was prepared in the same manner as in Example 2, and the film thickness was measured. As a result, the film thickness was as set, the standard deviation was 0.10, and the film thickness unevenness was small.

[Comparative Example 1]
Using a spray gun without a two-point crossing laser beam unit for visual recognition of distance, and without using an ear-mounted metronome, the paint distance and spray gun operation speed were arbitrarily painted as the painter felt. After coating, it was dried for about 1 hour in an environment of an air temperature of 23 ° C. and a humidity of 50%, 10 arbitrary locations on the coated plate were selected, and the film thickness was measured by SEM. As a result, the variation in film thickness was large, and the standard deviation was as large as 1.04.

1 is a side view schematically showing a coating machine according to an embodiment of the present invention. It is a top view which shows typically the coating machine which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Coating machine, 3 ... Spray gun, 3a ... Paint discharge port, 7 ... Laser pointer (laser beam irradiation part), B ... Laser beam, D ... Spray direction of paint, L ... Painting distance, W ... Building outer wall, Wa ... the building exterior wall surface.

Claims (6)

A painting machine used to paint building exterior walls,
A spray gun having a paint discharge port for injecting paint;
And at least two laser beam irradiation units that are attached to the spray gun and irradiate a laser beam toward the spray direction of the paint,
The laser beam irradiating unit irradiates the laser beam so that the laser beam intersects on the surface of the building outer wall and the coating distance can be visually confirmed in order to keep the coating distance between the building outer wall and the spray gun constant. A painting machine characterized by that.   A painting method at a construction site, wherein the painting machine according to claim 1 is used.   The coating method according to claim 2, wherein a device that emits sound at regular intervals is used in order to keep the operation speed of the spray gun constant.   The painting method according to claim 3, wherein the device that emits sound at regular intervals is a metronome.   The painting method according to claim 4, wherein the metronome is an ear-mounted metronome.   The coating method according to claim 2, wherein a photocatalyst paint is applied to the building outer wall.

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