JP2002192062A - Method for coating external wall surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a method for coating external wall materials which can easily produce various density patterns even by a single color, does not require labor for maintenance and inspection and can be inexpensively executed when the surfaces of the external wall materials are subjected to color coating. SOLUTION: A multiplicity of spray guns 1 which form spray patterns 1a to be sprayed to the surfaces of the external wall materials 10 to a circular to elliptic shape are arrayed in a direction orthogonal with a transfer direction of the external wall materials 10 and the spray patterns 1a of these spray guns 1 are so sprayed as to be continuous with substantially no interruption in the orthogonal direction. The respective spray guns 1 impart the arbitrary various density color patterns to the external wall materials by controlling the jet time of the spray patterns in such a manner that the spray patterns of the contours are completely drawn by one time of the intermittent jet on the surfaces of the external wall materials 10 and that the spray patterns of the colors become paler as the jet time being shorter than a reference and likewise the spray patterns of the colors become darker as the jet time nearing the reference according to the various densities of the surface coating by determining the longest time when the spray patterns 1a are sprayed in a continuously arranged state in the transfer direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for coating an outer wall material.

[0002]

2. Description of the Related Art A fiber-reinforced cement board, which is widely used as an outer wall material, has a surface color of gray-white if left as it is.
Since it is gray-black and poor in design, decoration with various colors is performed to also impart surface waterproofness.

By the way, at present, there are two types of coating methods suitable for applying a blur pattern or two or more colors as the surface coloring makeup of the exterior wall material, a method using an ink jet and a method using a spray gun. Is dominant.

[0004]

However, the former ink-jet method is a method in which a small nozzle used in an ink-jet printer sprays paint in small dots on the outer wall material surface. Since the amount cannot be changed, there is a problem in that a blur pattern is mainly formed by color matching of two or more colors, and a light and shade pattern cannot be represented by one color.

[0005] Further, since decorative painting is performed so as to fill a wide surface with small dots from minute nozzles, it takes a long time to paint and there is a problem that the processing speed is reduced. Further, since the minute nozzle is easily clogged, there is a problem that maintenance and inspection are troublesome.

In the latter spray gun system, various blur patterns that change steplessly can be realized by continuous control of the spraying time and the supply amount of the paint, but with a single spray gun, the tone of shading is too monotonous. There is no change in the direction perpendicular to the transfer direction, and a large number of nozzles are installed in parallel, and the spray pattern of each spray gun There is a problem that a stripe pattern is formed on the wall plate surface due to the overlap.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a method for coating an outer wall material which can easily display a light and shade pattern even with one color, and which can be carried out at low cost without troublesome maintenance. Things.

[0008]

According to a first aspect of the present invention, there is provided a method for coating an outer wall material, comprising: spraying a spray gun having a circular to elliptical spray pattern onto a surface of the outer wall material in a direction perpendicular to a transport direction of the outer wall material. So that the spray pattern of the spray guns is substantially continuous in the orthogonal direction without interruption, and each of the spray guns is provided with a single intermittent spray on the surface of the outer wall material to be transferred. The spray pattern is completely drawn, and based on the longest time that the spray pattern is sprayed in a continuous arrangement state in the transfer direction, based on the density of the surface coating, a light color with a shorter spraying time than the reference, also approaching the reference By controlling these injection times, an arbitrary dark and light color pattern is added so that a darker color spray pattern is drawn.

[0009] Here, "the longest time in which the spray pattern is continuously sprayed in the transfer direction" means that when the paint is sprayed from the spray gun onto the surface of the wall plate moving at a constant speed, the spray is continuously sprayed for a long time. The spraying time is such that the spray pattern does not remain circular or elliptical on the wall plate surface and no banding-like paint remains on it, and the prescribed spray pattern can be drawn with a single spraying, and the next spraying Is the longest spray time that can be continued without interruption with the spray pattern produced by

[0010] Specifically, the injection time is set at a transfer speed of 3
If it is 0 m / min, the interval is about 20 milliseconds. According to this method, for example, a diameter of 10
Since the spray pattern of about mm is sprayed in a circular or elliptical shape that is continuous in the front, rear, left and right directions, no stripe pattern or the like due to continuous spraying can be formed, and the shading can be easily performed by adjusting the spraying time.

Further, since the area of the spray pattern is larger than the dot of the ink jet system, the coating processing time is short, and the coating is completed in a short time. The method for coating an outer wall material according to claim 2 is the method for coating an outer wall material according to claim 1, wherein a plurality of spray guns arranged so as to be continuous in the orthogonal direction without substantially interrupting a spray pattern are formed. As a group, two or more groups of such spray guns are provided according to the colors, and the paints of these two or more colors can overlap each other after being applied.

[0012] Therefore, in addition to the expression by the density of the spray pattern, a superimposed pattern of different colors can be realized, and more various decorative paintings can be performed. According to a third aspect of the present invention, in the method for coating an outer wall material according to the first or second aspect, a spray gun needle used is directly opened and closed by a solenoid which operates in response to an electric control signal. It is intended to be controlled.

According to the present invention, since the opening and closing of the needle is controlled directly by the solenoid, responsiveness to a change in injection is good, and a subtle change can be easily made.

[0014]

Next, an embodiment of the present invention will be described. FIG. 1 is a plan view of a spray device for carrying out the method of the present invention, and FIG. 2 is a front view thereof. FIG. 3 is an explanatory view showing an arrangement state of a spray gun and a spray pattern in the spray device shown in FIG.
(A), (b) is explanatory drawing of the spray pattern of a spray apparatus similarly.

In FIG. 1, reference numerals 1 ... 1 denote a large number of spray guns arranged on a conveyor 11 on which the outer wall material 10 is transferred, as shown by arrows, in a direction perpendicular to the transfer direction in FIG. It is supported by the base frame 2 as shown.

The base frame 2 has, on a conveyor 11, a beam 2a arranged orthogonally and brackets 2b... 2b attached to the beam 2a by fastening members 2c such as bolts.
A large number of spray guns 1...
And is supported by the beam 2a.

Further, the beam member 2a has an arch member 2d,
An up and down movement can be adjusted by an electric jack (not shown) from a support base frame (not shown). In addition, the conveyor 1
Numerals 1 are provided in parallel to accelerate the coating process, and each has a spray gun 1 supported by a base frame 2.

Each of the spray guns 1 shown in FIG.
The spray pattern 1a sprayed on the surface 0 as the jet flow Z is formed in a circular or elliptical shape as shown in FIG. 4 (a), and the diameter d is preferably 6 mm to 15 m.
m, and in the case of the illustrated example, a circular or elliptical shape having a diameter d = 10 mm.

The spray pattern 1a is shown in FIG.
As shown in FIG. 2, the outer wall members 10 are arranged so as to be continuous in a direction perpendicular to the transfer direction (arrow in FIG. 1) of the outer wall members 10.
Since the spray guns 1... 1 shown in FIG. 1 cannot be arranged adjacent to each other so that the spray patterns 1 a having a diameter of 10 mm are continuous, a large number of spray guns 1. The spray guns 1 and 1 of each group are arranged at front and rear positions along
Are arranged in a staggered manner as shown in FIG. 3, and when the spray pattern 1a is sprayed, when the outer wall material 10 advances in the direction of the arrow in FIG. Are arranged continuously.

When the spray guns 1 and 1 have small widths and can be arranged adjacently, the staggered arrangement as described above is not necessary. Each of the above spray guns 1
As shown in the sectional view of FIG. 5, the plunger 5 of the solenoid 4 is directly connected to the opening / closing needle 3, so that quick operation is performed.

The solenoid 4 is fixed to a support frame 1c of the spray gun 1 via a bracket 1d as shown in FIG. 6, so that the movement of the plunger 5 can be accurately transmitted to the open / close needle 3. The position of the bracket 1d can be adjusted vertically with respect to the support frame 1c by adjusting screws 1e.

In FIG. 5, reference numeral 6 denotes a paint supply port, 7 denotes an atomizing air supply port, and paint supplied from the paint supply port 6 passes through a passage 3a formed concentrically around the opening / closing needle 3. The air is supplied to the tip of the needle, and is similarly atomized by the air supplied from the atomizing air supply port 7 through the air passage 7a formed concentrically around the opening / closing needle 3 and the paint passage 3a. It is injected as Reference numeral 8 denotes a diaphragm-type sealing member that seals between the opening / closing needle 3 and the casing block 9.
The seal structure is such that the operability of the solenoid 4 is not hindered.

Each member is fixed by a bolt or the like. The opening time of the opening / closing needle 3 is a time during which a spray pattern having a diameter of about 10 mm is drawn with a single jet flow Z as shown in the figure, even though the outer wall material 10 moves in the direction of the arrow. In addition, coloring is performed by setting the longest time as a reference and setting a shorter time than the time in which the spray pattern formed by the next spraying becomes a continuous state as shown in FIG. 4A. The density can be adjusted.

That is, when the transfer speed of the conveyor 11 is 30 m / min as the injection time P shown in FIG. 4A, the injection time P is every 20 milliseconds (hereinafter referred to as "mS"). However, using this 20 mS as a unit of delimitation,
Among them, as shown in FIG. 4B, the opening / closing time of light to dark is adjusted as 1 to 20 mS according to the density of the spray pattern.

It should be noted that the transfer speed of the conveyor 11 is 48
In the case of m / min, P = 12.5 mS is set as a unit of division. Among them, the opening / closing time of 1 to 12.5 mS, and the transfer speed of the conveyor 11 of 24 m / min, P = 25.0 m.
The opening / closing time is 1 to 25 mS in each S as a unit of division.

The control of the injection time is performed by an electric signal. The operation of the opening / closing needle 3 is achieved by combining the plunger 4 directly with the opening / closing needle 3 and the diaphragm type sealing member 8. The response of the movement to the command is very good.

A member denoted by reference numeral 14 as another component of the coating apparatus 2 is a rotary brush, and is for removing dirt such as paint adhered to the lower surface of the spray gun 1. Reference numeral 14a denotes a drive motor, and a frame 2f is
Mounted through.

Next, a method of coating an outer wall material using the above apparatus will be described. First, the opening / closing time of the opening / closing needle 3 of each spray nozzle 1... 1 is set in accordance with a desired pattern.

The mode of the set time follows the timing and the open / close time as shown in FIG. 4B, and is set to the open / close time according to the density of the target pattern. First, outer wall material 1
0 is placed on the conveyor 11 and positioned, and then transferred toward the spray device.

When the outer wall material 10 approaches the spray device, the control device of the spray device starts operating based on the detection information of a sensor (not shown). The solenoid 4 attached to the first opening / closing needle 3 starts operating.

The opening and closing time of the opening and closing needle 3 is shown in FIG.
As shown in (b), since the length is controlled within the time for drawing the spray pattern, a circular or elliptical spray pattern having a density corresponding to the length of the spray time is displayed.

Further, since the spray guns 1 and 1 are substantially arranged without gaps in the width direction of the outer wall material 10, the outer wall material having passed through the two groups of spray guns has relative movement in the transfer direction and width direction. With the circular or elliptical pattern, the shade coating is performed over the entire surface.

Although the spray pattern 1a is shown by a circle having a sharp outline for the sake of illustration, the spray pattern 1a actually has a blurred outline and is adjacent to each other.
The painted surfaces a and 1a are completely integrated without drawing a clear boundary.

As a result, the tint-colored pattern is vividly added based on the control information. In the above embodiment,
The case where one kind of paint is sprayed from the spray device has been described. However, the present invention is not limited to this, and two or more spray devices are arranged along the same conveyor, and different paints are supplied, and a multicolor pattern is provided. It is possible to make a painted pattern.

In this case, since the density of the spray pattern in the form of a circle or an ellipse is made to be variously varied, and the color is changed by interlacing or the like, a paint with a better design can be obtained.

In the above-described embodiment, only the painting with a spray gun has been described, but it goes without saying that a sealer painting, an undercoating, etc. are applied in advance. Further, if necessary, a finish coating such as a clear coating can be applied to the surface after the coating.

[0037]

According to the first aspect of the present invention, when the outer wall material surface is coated with a spray device, it is not a continuous jet but a circular or elliptical shape. Since the entire surface is painted without interruption by intermittent spraying, it is possible to draw a complex light and shade pattern without a monotonous pattern such as continuous spraying.

In addition, since the diameter of a spray pattern of a circle or an ellipse is much larger than that of an ink-jet type dot, the time required for the coating process is reduced accordingly. Furthermore, since the color density of each circular or elliptical pattern can be changed by adjusting the length of the injection time as compared with the ink jet method, it is possible to perform dark and light coloring even with a single color. Becomes possible.

According to the second aspect of the present invention, two or more kinds of colors are mixed and applied to the surface, so that when the second coating is applied after the first coating, the two-toned state or mutual mixing is applied. It is possible to finish any of the existing neutral-color paints, and a variety of decorative paints are possible.

According to the third aspect of the present invention, the injection response speed of the spray gun can be greatly increased, and in practice, the spray response speed of the spray gun can be reduced to 0.1.
Since the injection time can be adjusted at intervals of 1 millisecond, there is an effect that a more delicate pattern can be displayed.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part of a coating apparatus used for a method of coating an outer wall material according to the present invention.

FIG. 2 is a side view showing a coating step of the present invention.

FIG. 3 is an explanatory diagram of a spray pattern and an arrangement state of a spray gun according to the present invention.

FIG. 4 is an explanatory view of a spray pattern according to the present invention;
(A) is a plan view and a graph showing the size of one spray pattern, and (b) is a plan view and a graph showing the density of one spray pattern.

FIG. 5 is a cross-sectional view of a spray gun for performing the method for coating an outer wall material according to the present invention.

FIG. 6 is a side view of a spray gun for performing the method for coating an outer wall material according to the present invention.

[Description of Signs] 1 Spray gun 2 Base frame 3 Opening / closing needle 4 Solenoid 5 Plunger 6 Paint supply port 7 Atomizing air supply port 8 Diaphragm type sealing material

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B05D 7/00 B05D 7/00 K

Claims (3)

[Claims] 1. A large number of spray guns having a circular to elliptical spray pattern to be sprayed on the surface of an outer wall material are arranged in a direction orthogonal to the direction of transport of the outer wall material, and the spray pattern of the spray gun is set in the orthogonal direction. Each spray gun is designed so that the spray pattern of the contour is completely drawn in one intermittent spray on the surface of the outer wall material to be transferred, and the spray pattern is formed in the transfer direction. Based on the longest time that is sprayed in the continuous arrangement state, based on the shade of the surface coating, a light color with a shorter spray time than the reference, a spray pattern of a darker color as the reference is approached is drawn. A method for painting an exterior wall material that can be given an arbitrary shade pattern by controlling. 2. The method for coating an outer wall material according to claim 1,
As a group, a large number of spray guns are arranged such that the spray pattern is substantially continuous without interruption in the orthogonal direction, and two or more groups of such spray guns are provided according to colors, and , A method of painting an outer wall material capable of painting these two or more colors. 3. The method for coating an outer wall material according to claim 1 or 2, wherein a needle of a spray gun to be used is directly opened and closed by a solenoid that operates in response to an electric control signal. How to paint the exterior wall material.