JP3435099B2 - Building board coating equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building board coating apparatus, and more particularly, to an effective shadow coating on a concave portion of a building board having a concave portion such as a groove so that high designability can be obtained. A coating device for building boards.

[0002]

2. Description of the Related Art A building board having a groove on its surface is widely used, and its surface is usually coated for the purpose of enhancing its design. In the conventional general coating method, for example, a joint color spray coating is performed on the surface of a base material such as a cement plate including grooves, and then a surface coating of an appropriate color is performed by a roll coater method, a flow coater method or the like. Done.

[0003]

FIG. 37 shows a cross section in the case where the surface coating by the roll coater method is performed on the surface of a conventional building board. The building board a has grooves 5 on its surface. When coating the surface, a joint-colored coating a1 is first formed on the entire surface including the grooves 5 by spray coating, and then an appropriate coating is applied by a roll coater. The film a2 is formed on the convex portion (flat surface). As shown in the figure, in the case of the roll coater method, a uniform coating is formed when the convex portion is a flat surface, but the coating film becomes non-uniform on a building board having a surface with large irregularities. Can not be applied to various surfaces. Further, in the roll coater method, it is not possible to apply special coating to the groove portion 5, and the groove portion 5 is spray-painted a1 with a joint color.
The same density is maintained on all the surfaces forming the groove 5. Therefore, it is not possible to give the groove portion 5 a delicate shade. When a sponge roll is used, uniform coating is possible even on a surface having irregularities to some extent, but in practical use, the height difference is about 3 mm, and the desired groove 5 It cannot be painted.

In the case of the flow coater method or the like, the surface of a building board having a large height difference can be coated to some extent, and the groove portion can be continuously coated. Although it is possible, the thickness and color density of the coating film are constant, and it is not possible to apply a coating having a shade in the groove. Further, although it is possible to apply the coating to the linear groove portion to some extent, it is not possible to apply the coating uniformly to the curved groove groove or the groove groove with a variable groove width. In addition, the coating by the flow coater method has a lower limit to the groove width that can be coated, and there is also a disadvantage that coating becomes difficult when the groove width becomes narrow to some extent.

Therefore, the conventional surface-painted building board has a strong flatness as a whole as a whole, and in particular, a poor feeling of shading in concave portions such as concave grooves cannot provide high designability. In each case, it is premised that coating is applied to a building board having a relatively simple surface shape such that several streak-shaped grooves are formed on a flat surface, and complicated uneven shapes and A desired painting cannot be applied to a building board having a pattern on its surface. In recent years, it has become possible to easily manufacture a building board having a complicated surface shape by an extrusion molding method or a casting method having a high molding property, and particularly in a concave portion of a surface handle having such a complicated uneven shape. On the other hand, a desired coating is required, but a surface coating having a satisfactory design property has not been obtained yet.

An object of the present invention is to obtain a coating apparatus capable of obtaining a building board having a high surface design which cannot be obtained by a conventional coating apparatus, and in particular, a straight line or Construction that can give a high surface design by applying a coating that gives a strong shadow effect to the concave part of a complicated shape that is curved and the cross-sectional shape in the lateral direction is not constant To get the painting equipment for the boards.

[0007]

A building board coating apparatus according to the present invention for solving the above problems is formed on a conveying means for conveying a building board and a surface of the building board conveyed by the conveying means. A coating device having one or a plurality of coating nozzles for coating a concave portion,
The nozzle is a central ejection hole that ejects paint in a rectified state,
Air along one or both of the left and right edges of the sprayed paint film.
A coating nozzle having an air ejection hole for ejecting
The mounting nozzle is adjustable in its height and injection direction.
The height and spray direction of the coating nozzle are
By the information based on the lateral cross-sectional shape of the concave portion,
The central portion of the sprayed paint film is in the bottom area of the concave portion.
The coating film is sprayed and the left and right side edges of the coating film are the concave portions.
It is characterized in that it is controlled so as to be sprayed to the left and right side areas of the.

By using this coating apparatus, the bottom area is the darkest color and the side area is different from the bottom area formed on the surface of the building board and the concave portion formed of the left and right side areas. It will be possible to paint so that it gradually becomes lighter toward the surface side, giving a strong shade to what you see, and easily manufacturing a building board with a high design that emphasizes the depth of the concave part more than it actually is. You can

In the present invention, the cross-sectional shape of the concave portion in the lateral direction is not limited, and the bottom portion, the side surface, and the like like an ordinary gutter-shaped cross section.
The partition on the surface is not limited to a clear one, but each partition may be unclear or continuous, and there is a part that is visually perceived as a "bottom part", All recesses that are perceived as "are included. Therefore, in the present specification, "bottom area"
In that case, the term is used broadly to refer to the area that can be visually perceived as the "bottom", and the term "side area" is used to broadly refer to the area that is perceived as "side". ing. Further, neither the “bottom area” nor the “side area” need be flat surfaces, and may be uneven surfaces or curved surfaces.

The coating apparatus according to the present invention preferably further comprises means for imaging the concave portion and means for controlling the height and inclination angle of the coating nozzle based on the information obtained from the imaging data. The position and angle of the coating nozzle are controlled according to the shape of the part. More preferably, it further comprises means for detecting an edge portion which is an intersection of the side surface region of the concave portion and the surface. Then, based on the information about the edge portion, the position of the coating nozzle, the spraying of the paint from the coating nozzle is intermittent, the spraying pressure of the paint from the coating nozzle is changed, etc., and the concave portion having a higher designability is formed. It is painted or done.

It is also possible to use only one of the above-mentioned coating devices, and a plurality of coating devices are arranged at different angles so that the building boards to be coated with these coating devices pass continuously. By doing so, it is possible to continuously apply the above-mentioned coating to the concave portions formed in large numbers in the intersecting direction.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is an enlarged view showing a part of a building board A coated by a coating apparatus according to the present invention. In the example of FIG. 1a, the main body a is a cement board, and the bottom surface 2 and the left and right sides are provided on the surface thereof. Sides 3 and 4
And a concave groove 5 having a bilaterally symmetrical shape in a cross section in the lateral direction is formed. The recessed groove 5 is coated by a coating method described later. The coating has the darkest color near the bottom surface 2, and the left and right side surfaces 3 and 4 are directed from the bottom surface 2 to the surface 6 (see FIG. (In the direction of the arrow) is gradually becoming lighter. Although the color of the paint is arbitrary, it may be a color exhibiting the color tone of the joint portion in the conventional building board, or may be given a design by another color. Note that, in FIG. 1, a color density boundary line appears for the sake of illustration, but in an actual product, the color density continuously changes, and the boundary line does not appear.

The coating of the concave groove 5 may be carried out before the coating of the surface portion 6 or after the coating of the surface portion. In the latter case, as shown in FIG. When the surface is subjected to sputter coating 6a by a method or the like, an unnecessary spatter pattern that has entered the concave groove 5 can be easily erased, and as a result, the convex portion (surface portion)
The spatter pattern of No. 1 is emphasized, and a building board A with high design is obtained. By applying a coating having such a density difference to the concave groove 5, it is possible to give a strong sense of shading to what is seen, and the depth is emphasized more than it actually is, resulting in high designability.

2A and 2B are a plan view (FIG. 2A) and a side view (FIG. 2B) showing an enlarged view of another embodiment of the building board A. In this example, the short length of the concave groove 5 formed on the surface is shown. The cross-sectional shape in the hand direction is not bilaterally symmetric, and one side surface 4 is more inclined than the other side surface 3. Therefore, the concave groove 5
When is horizontally projected from above, the horizontal component of the left side surface 3 is longer than the horizontal component of the right side surface 4. In this example, the longer side of the horizontal component (ie,
Painting is performed so that the average density of the left side surface 3) is lighter than the average density of the side surface (that is, the right side surface 4) on the shorter side.

When a building board A having a concave groove 5 having a shape as shown in FIG. 2 is attached to a building, the side surface 3 having a smaller inclination angle is more visible than the other side surfaces 4. Even if the entire concave groove 5 is coated to the same density, the side 3 that is the most visible is likely to be bright, and the side 4 that is less visible tends to become a shadow and appear darker than that. is there. The form of FIG. 2 utilizes this visual phenomenon, and the side with the longer horizontal component (that is, the left side 3) is used.
By coating so that the average density of is lighter than the average density of the shorter side surface (that is, the right side surface 4),
The difference between the light and dark can be further emphasized, giving the viewer a feeling of unevenness more than it actually is. Thereby, the building board A having a high design property can be obtained.

Although not shown, in this case, like the one shown in FIG. 1, the density on the left or right side or one of the side surfaces may gradually become lighter from the bottom toward the front side. As a result, higher designability can be obtained.

In the building board A, the cross-sectional shape and the planar shape in the lateral direction of the concave groove 5 formed on the surface are arbitrary and are not limited. 3A to 3G and 4H to O show some examples of the cross-sectional shape in the lateral direction of the concave portion. Figure 3A
The concave groove 5 is an ordinary concave groove, but the surface convex portions 6, 6 are not flat (not in the same plane). In FIG. 3B, the concave groove 5 is an ordinary concave groove, but the surface convex portion 6 is FIG. 3C shows a concave groove 5, one side surface 4 of the concave groove 5 has inclined surfaces 4a and 4b with different angles, and FIG.
3E has an inclined bottom surface 2, FIG. 3E shows one side surface 4 of the concave groove 5 having a stepped shape 4c, and FIG. 3F shows that the entire surface 6 and the concave groove 5 are formed by a continuous curved surface. In FIG. 3G, one side surface 4 of the concave groove 5 is a curved surface.

Further, FIG. 4H shows a recessed groove 2a formed on the bottom surface 2 of the recessed groove 5, and FIG. 4I shows a continuous curved surface of the recessed groove 5 with a recessed groove 2b formed on the bottom thereof. FIG. 4J shows an uneven surface 2c in which the bottom surface of the concave groove 5 is continuous.
4K is a curved surface 2d in which the bottom surface of the concave groove 5 is continuous, FIGS. 4L and 4M are concave and convex surfaces in which the entire concave groove 5 is continuous, and FIG. 4N is different in depth. A plurality of concave grooves 5a, 5b formed in the longitudinal direction, FIG.
O is a plurality of concave grooves 5a and 5c having different widths formed in the longitudinal direction. These are merely examples, and many others are possible.

5A-F, 6G-L, and 7M-Q,
It shows the surface shape of the concave groove 5 formed on the surface of the building board, and shows a state in which the building board A is viewed from the surface. 5A is a linear concave groove 5, FIG. 5B is a curved concave groove 5 curved in an S shape, FIG. 5C is a linear concave groove 5 in a polygonal shape, and FIG. 5D is It is a concave groove 5 in which a straight line portion and a curved portion are combined, and FIG. 5E shows a linear concave groove 5 that is a broken line and is discontinuous in the middle, and FIG. 5F shows an S shape. Curved curved groove 5
Is discontinuous on the way.

FIG. 6G shows the groove width of the linear concave groove 5 partially different, and FIG. 6H shows the linear concave groove portion and the curved concave groove portion. 6I shows that the linear concave groove 5 is discontinuous, and FIG. 6J shows that the groove width of the linear linear concave portion is partial. 6K is the one in which the groove width of the linear concave groove 5 is partially different in an arc shape.
L is a groove in which the linear groove 5 has a partially different groove width and is discontinuous on the way.

7M to Q show an example in which the concave groove 5'is formed by the vertical concave groove 5'and the horizontal concave groove 5 ''.
In FIG. 7N, the vertical groove 5 ′ and the horizontal groove 5 ″ intersect in a checkerboard pattern. In FIG. 7N, the horizontal groove 5 ″ is arranged without connecting the vertical grooves 5 ′, and in FIG. 'And lateral groove 5''intersect in a staggered manner. Further, FIG. 7P shows a large number of large and small concave grooves 5c and 5d which are substantially L-shaped and are arranged in a directional manner. In FIG. 7Q, the large and small concave grooves 5c and 5d which are L-shaped are discontinuous. It is said that. The above-described coating mode is applied to all of the concave grooves 5 having the above-described cross-sectional shape and surface shape, or to an appropriately selected portion.

Next, a coating nozzle suitable for coating the concave portion in the manner shown in FIGS. 1 and 2 will be described with reference to FIG. The coating nozzle 10 is composed of a tip portion 12 having a flattened ellipse-shaped paint discharging hole 11 and a main body portion 14 having a paint feeding passage 13 connected to the paint discharging hole 11 of the tip portion 12. A poppet bar 15 for stopping and starting discharge and adjusting the discharge amount is inserted in the paint feed passage 13 so as to be vertically movable by a mechanism such as a solenoid (not shown). 16 is a packing that also serves as a leak preventer and a guide.

A side passage 17 is formed in the paint supply passage 13, and the side passage 17 is connected to a paint pressure supply source (not shown). The tip portion 12 is further provided with air discharge holes on both sides of the paint discharge hole 11 so that low-pressure air can be discharged near both ends 21, 21 of the paint film 20 discharged from the paint discharge hole 11. 23, 23 are formed, and the air discharge hole 23 is connected to a pressure air supply source (not shown).

In the coating nozzle 10, the paint discharge hole 11
Since the shape of is a flat ellipse, the poppet bar 1
By adjusting the position of No. 5, the paint supplied from the paint pressure supply source through the paint supply passage 13 has a liquid pressure of 0.5 to
Paint discharge hole 1 at a flow rate of about 2.0 kg / cm ²
1, the coating pattern 25 has a horizontal straight line. As shown in FIG. 8, the air ejection direction of the air ejection holes 23, 23 is preferably 1.0 to 1.0 along the both ends 21 and 21 of the paint film 20 ejected in the form of a horizontal straight line. Since it is jetted at a pressure of about 2.0 kg / cm ² , both ends of the sprayed paint film 20 are atomized (atomized) 22, 22 and both ends 26, 26 of the linear pattern in the coating pattern 25 are blurred. In other words, the end portions of the linear pattern gradually become lighter in color toward the outside than the central portion of the linear pattern.

The concave portion of the building board is coated by using the coating device having the coating nozzle 10. At that time, the position of the coating device is controlled so that the central portion of the straight line pattern drawn by the paint film 20 that is in the rectified state is sprayed on the bottom area of the concave portion. As a result, in the left and right side areas,
Part 2 atomized (atomized) by jetting low-pressure air
6 and 26 are mainly sprayed, and as a result, as shown in FIG. 1, the bottom area is the darkest color and the side areas are gradually lightened from the bottom area toward the front side. To be done. As a result, the shadow of the concave portion is enhanced, and it is possible to make the viewer feel the difference in height more than it actually is. Thereby, the design of the surface is improved.

Next, description will be given of a case where a concave portion whose cross-sectional shape in the lateral direction is not symmetrical is coated by using the coating apparatus having the coating nozzle 10 as described above. According to the coating method of the present invention, the left and right side areas of such a concave portion are the average of the shorter side area of the longer side area of the horizontal component when the concave portion is horizontally projected from above. It is painted so that it becomes a lighter color than the density.

As described above, when the concave portion formed on the surface of the building board is viewed from directly above, when the concave portion is divided into right and left with respect to the central position of the concave portion, the side portion that is most noticeable is Sides that appear bright and are less visible tend to be shadowed and appear darker than that. By coating the left and right side areas with light and shade as described above, the visual phenomenon is further emphasized and the designability is enhanced, but in the present invention, as a parameter therefor, the bottom surface of the concave portion is used. A vertical line L standing on the center line of (bottom area) 2 intersects with a line segment that connects both ends of the upper opening (that is, a straight line connecting two points where the left and right side areas intersect with the surface of the building board). Therefore, the lengths L1 and L2 of the two line segments that are divided into two are used. Since the side surface area on the side to which the long line segment belongs appears brighter than the side surface area on the side to which the short line segment belongs, the position and the spray angle of the coating nozzle 10 are set so that the spray distance to the side surface area becomes longer. To L1 / L2 (when L1> = L2) or L2 /
Adjust according to the ratio of L2 (when L2> = L1).

A specific example will be described below. The concave portion normally has a three-sided structure including both side surface portions and a bottom surface portion,
Information about the cross-sectional shape of the concave portion in the lateral direction is provided in advance.
It is acquired using an imaging device such as a digital camera. That is, as shown in FIG. 9, image data captured by the image pickup device is developed on a display, and two points A and B at both ends of the upper opening that form the concave groove 5 and two points C at both ends of the bottom are formed.
Each coordinate of D is specified with a mouse or the like. In this way, four points (A, B, C,
Find the coordinates of D). Then, now A (x ₁ , y ₁ ), B
_{(X 2, y 2),} C (x 3, y 3), D (x 4, y 4)
Then, the vertical L standing on the center line of the bottom (line segment CD)
However, the coordinates P (x _i , y _i ) of the point intersecting the line segment (AB) connecting both ends of the upper opening are obtained by the following equation. x _i = x ₃ + (x ₄ −x ₃ ) / 2 ·· y _i = y ₁ + {(x _i −x ₁ ) / (x ₂ −x ₁ )} × (y ₂ −y ₁ ) ··

Then, the line segment L1 (that is, the line segment AP)
And the line segment L2 (that is, the line segment PB) are calculated by the following equation. L1 = | ((x _i −x ₁ ) ² + (y _i −y ₁ ) ² ) ^1/2 | ·· L2 = | ((x ₂ −x _i ) ² + (y ₂ −y _i ) ² ) ^1/2 ｜ ・ ・

Next, the magnitudes of the obtained L1 and L2 are compared to determine the spray direction of the coating nozzle, and further the spray angle α is determined according to the ratio of L1 / L2 or L2 / L1. That is, as shown in FIG. 10, the height of the coating nozzle, that is, the distance hs from the average height position of the bottom surface 2 of the concave portion to the tip of the coating nozzle is determined. Generally, the coating nozzle has a standard spray distance and a coating pattern width Ls corresponding to the standard spray distance (see FIG. 8) from the optimum specification conditions.
See). Therefore, as shown in FIG. 10, the coating nozzle height hs is set to a height at which the standard coating pattern width Ls substantially matches the width of the bottom surface 2 of the concave portion to be coated.

Next, according to the value of L1 / L2 (L1> L2) from the vertical line L toward the smaller one of L1 and L2 (direction L2 in the illustrated example). Move the position of the coating nozzle horizontally by a fixed amount m, then
The inclination angle α of the coating nozzle is determined (that is, the isosceles triangle, which is the spray pattern formed by the coating film 20 at the standard spray distance, displays the limit position that can be formed in the concave groove 5 as shown in FIG. The optimum movement amount m and the inclination angle α at that time are determined by obtaining it from the image developed above by the drawing method.In this case, m is slightly shorter than the limit position in consideration of safety. Set to the value and set the value α accordingly.
Correspondence between the values of L1 / L2 and m and α is obtained by performing some recesses of similar assumed cross-sectional shape, and from the correspondence table data, L1 / L2 in the target recesses is obtained.
The values of m and α according to the value of are estimated by an interpolation method or the like. ).

As shown in FIG. 10, the coating pattern at the standard spray distance hs from the coating nozzle 10 in this state has the coordinate point D at one end side (the right end in FIG. 10) of the coating pattern width Ls. (FIG. 9) The paint surface is located in the vicinity, and on the left side of the area, a distance longer than the standard spray distance hs is the painted surface. Therefore, the average density of the side surface 3 on the long line segment L1 side is lighter than the average density of the side surface 4 on the short line segment L2 side. Further, since both ends of the sprayed paint film are atomized as described above, the coating on the side surface portion is gradually lightened toward the front surface side rather than the bottom surface portion.

As described above, by adopting the coating method according to the present invention, when the concave portion is horizontally projected from above, the average density of the side area having a longer horizontal component is higher than the average density of the side area having a shorter horizontal component. It is possible to paint so that it is lighter than that, and the vicinity of the bottom area is the darkest color, and the left and right side areas gradually become lighter from the bottom area toward the surface side. It is possible to give a strong shadow feeling to those who see the concave portion, and to enhance the design of the entire surface of the building board.

Depending on the size of the bottom surface of the recessed portion, as shown in FIG. 11, the width L of the bottom surface region in the cross-sectional shape in the lateral direction.
i is the coating pattern width L corresponding to the standard spray distance hs
It may be less than s. In that case, the coating nozzle 10 is raised (distance x) to a position where the coating pattern width Ls can be secured between the left and right side surfaces of the cross section. After that, the length of the line segment divided by the intersection of the vertical line L standing on the center line of the actual bottom surface 2 and the line segment AB is obtained by the equations (1) to (4) as described above, and the same applies to the coating nozzle Determine position and spray angle. In this case, the injection distance is longer than in the case shown in FIG. 10, but the portion applied in the rectified state extends to the lower portions of both side surface portions, but the concentration change and the concentration difference in the side portions above it are higher. Is achieved similarly.
Of course, the above control is limited to the case where the coating pattern width Ls can be secured between the left and right side surfaces in the lateral cross section of the concave portion. When coating a concave portion having many cross-sections where the width Ls cannot be secured, it is necessary to change to a coating nozzle having a narrower coating pattern width.

In the above description, the cross-sectional shape of the concave portion in the lateral direction has a substantially gutter-shaped cross section, that is, the bottom surface and the side surface are flat surfaces, and the coordinates of partition points between the bottom portion and the side surface,
The partition point coordinates of the left and right side surfaces and the surface have been described as an example of a cross-sectional shape is clear, the coating method of the present invention,
Even if the bottom surface and the side surface are not flat but are uneven or curved, they can be used without any support. Figure 1
2 and FIG. 13 show some examples thereof, and FIG. 12 shows an example in which the width of the bottom surface region of the concave portion is substantially equivalent to the coating pattern width Ls corresponding to the standard spray distance hs.
3 is an example in which the width of the bottom area of the concave portion is less than the coating pattern width Ls corresponding to the standard spray distance hs. In any case, the coordinate points (A to D) of the four points are approximately obtained by specifying the black dot positions in the figure with a mouse or the like. Then, in the case of the shape shown in FIG. 12, calculation is performed by the method described with reference to FIG. 10, and in the case of the shape shown in FIG. 13, calculation is performed by the method described with reference to FIG.

Next, an example of a coating apparatus that can be suitably used for coating the concave portion formed on the surface of a building board by the above method will be described. FIG. 14 is a front view showing a state in which the coating device 40 according to the present invention is arranged above the building board A which is conveyed in a direction orthogonal to the plane of the drawing, in which concave grooves 5 ... A large number of building boards A (five in the figure) formed are carried on the carrying roller conveyor 31, and above the building boards A, a number of coating devices 40 corresponding to the number of the concave grooves 5 are provided on the rails 41a and 41b. Along the drawing, they are arranged in a state where position control is possible in the left-right direction (that is, the direction orthogonal to the transport direction of the building board A) (FIG. 15).
See also). In FIG. 14, 33 is a guide for the building board A, and 32 is a rotation support shaft of the transport roller conveyor 31.

Each coating device 40 has a traveling carriage 43 having wheels 42, and a coating nozzle support 44 whose position can be adjusted in the vertical direction on the traveling carriage 43, and the coating nozzle support 44 has a tip end. The coating nozzle 1 described above with reference to FIG.
0 is held so that it can be tilted. In FIG. 15, every other three traveling carriages 43 travel on the rails 41a, and the remaining two traveling carriages 43 travel on the rails 41b. Is arbitrary, as long as they can be arranged in close proximity so as not to come into contact with each other due to the relationship between the distance between the concave grooves 5 and 5 and the size of the traveling carriage 43, an appropriate number may be used. In FIG. 15, S1 to S3 are photoelectric switches including a light projector, a light receiver, and an amplifier (not shown). Each of the photoelectric switches S1 detects an approach of the building board A and the passage of the building board A, Photoelectric switches S2 and S3 that take the timing of starting and stopping the coating material spraying of the coating nozzle 10.

16 to 18 are enlarged views for explaining the main part of the coating apparatus 40. The traveling carriage 43 has a first stepping step for moving the carriage in a direction orthogonal to the direction in which the building board A is conveyed. The motor 45 and the coating nozzle support 44
Second stepping motor 46 for vertically moving the
Is mounted, the first stepping motor 45 drives the wheels 42 via the power transmission mechanism 47, and the second stepping motor 46 is supported on the traveling carriage 43 by the guide rod 48 so as to be vertically movable. A drive mechanism is connected to a pinion 50 that meshes with a rack 49 formed on the nozzle support 44 via a power transmission mechanism 51.
Move 4 up and down.

As shown in FIG. 17, the coating nozzle support 44 has a concave cutout 52 on the lower end side, and the rotary shaft 53 extending horizontally at the lower end of the concave cutout 52 has a drawing. The coating nozzle 10 shown in FIG. 8 is attached so as to be swingable in a direction orthogonal to the transport direction of the building board A with the rotating shaft 53 as a fulcrum. A third stepping motor 54 is attached above the rotary shaft 53, and the third stepping motor 5 is attached.
4 and the rotating shaft 53 are drivingly connected to each other via a power transmission mechanism 55. As a result, the coating nozzle 10 is driven by the third stepping motor 54, as shown in FIG.
It swings in the direction orthogonal to the transport direction of the building board A with the pivot shaft 53 as a fulcrum.

On both sides of the coating nozzle support 44, a passage 5 is provided.
6, 57 are formed, and a paint hose 58 connected to the side passage 17 formed in the paint nozzle 10 for supplying the paint and an air hose 59 connected to the air discharge hole 23 are inserted through the one passage 56. In the other passage 57, the wiring 6 of the control electromagnetic circuit (solenoid 72) (see FIG. 19) for operating the poppet bar 15 of the coating nozzle 10.
0 and the power wiring (not shown) of the third stepping motor 54 are inserted.

FIG. 19 is a circuit diagram of the air and paint piping system in the coating device 40. The air hose 59 of each coating nozzle 10 is connected to a supply manifold 62 which also serves as an air tank common to all the coating nozzles 10 via a normally closed two-port valve 61.
2 is connected to a pressurized air source 66 via a pipe 63, a pressure adjusting valve 64, and a filter 65. Each coating nozzle 10
The end of the paint hose 58 is a closed paint tank 6
It is open to the paint in 7 and the relief valve 68 is on the way.
Is attached. On the other hand, the branch pipe 69 from the pressurized air source 66 is opened to the inside of the sealed paint tank 67 via the pressure regulating valve 70 and the normally closed two-port valve 71.

The above-mentioned piping system, which is a control system (not shown), opens the normally-closed two-port valves 61 and 71 so that the paint is rectified at a specified pressure from the paint discharge hole 11 of the paint nozzle 10. At the same time as the jetting, air of a predetermined pressure is jetted from the air discharge holes 23 along the vicinity of both ends of the jetted paint film 20. As a result, as described above, both ends of the sprayed paint film are atomized (atomized), and both ends of the straight line pattern in the coating pattern are blurred. In addition,
In the figure, 72 is a solenoid for operating the poppet bar 15 of the coating nozzle 10.

Next, the operation of the above coating apparatus will be described. 20 is a block diagram of the entire control system of the present coating system, FIG. 21 is a control flow in the controller, and FIG. 22 is a control flow in the controller.
Image data on a groove cross-sectional shape from a digital camera, which is an example of an image pickup unit, is displayed on a display, and an operator looks at the displayed image to specify four points (A to D) that specify the groove cross-section. Then, the operator inputs the coordinate points A to D from the keyboard. Based on the input value, L1 and L2 which are the parameters representing the visual area when the building board A is viewed from directly above, L1 / L2 or L2 / L1 which is the specific parameter of the coating nozzle position, (if necessary)
The paint nozzle lift distance x and the paint nozzle tilt angle α, which is a specific parameter of the spray angle (if required), are calculated and the calculation results are sent to the controller.

The controller, based on the input data,
The first to third stepping motors 45, 46, 54
Is driven to move the coating nozzle 10 to a predetermined position, tilt the spray nozzle at a predetermined injection angle, and hold the posture until the next data is input. In this coating system, groove line follow-up control is performed in order to continuously perform appropriate coating on a curved groove or a polygonal groove, and a continuous or discontinuous groove.

FIG. 23 shows an example in which the edge 5a of the concave groove 5 formed on the surface of the building board A is detected by the image sensor unit 80 attached to the traveling carriage 43 of the coating device 40. The emitted light is reflected by the concave groove 5 and its surroundings, and the reflected light is captured by the linear photodiode array 82, and a pulse train (video signal) is obtained in proportion to the received illuminance of each element. As shown in the figure, there is a difference in illuminance between the reflected light from the convex surface and the reflected light from the inclined surface and the bottom surface, and the difference in the received illuminance appears as the pulse height. Edge 5
It becomes possible to detect a. The sensor unit 80
Is installed below the traveling carriage 43 and above the groove edge 5a, and slightly ahead of the paint injection position of the paint nozzle 10.

FIG. 24 shows the overall flow of groove line follow-up control. In this example, the groove surface patterns are classified into 4 types. That is, a continuous groove, a discontinuous groove, a continuous groove whose groove width changes, and a discontinuous groove whose groove width changes. Then, control patterns ~ are prepared for each groove type.

The control principle for moving the traveling carriage 43 following the obtained groove line data is as follows. As shown in FIG. 25, each element of the linear photodiode array 82 is numbered (for example, 1 to 20), the pitch of the elements is p, the sampling time for edge detection is Δt, and each edge is If the element number nA ′ corresponding to is, the movement vector di at Δt time is di =
It is obtained as p (nA-nA '), that is, information on the moving direction and the moving amount. The groove line data is obtained by converting this information into digital data. Based on the groove line data at the edge slightly ahead of the position of the coating nozzle 10,
The desired control can be performed by controlling the rotation of the stepping motor with respect to the moving direction and the moving amount (amount proportional to the number of pulses to be generated) of the traveling vehicle 43.
If the rate of change of the groove line is rather large,
Using the micro step drive method which is a circuit technology,
It is also possible to finely control the basic step angle (the rotation angle of the rotation shaft of the motor with respect to one input pulse).

FIG. 26 is a control flow in the groove line following individual pattern (continuous groove) shown in FIG. In this case, the first stepping motor 45 on the traveling carriage 43
The purpose is achieved by controlling the rotation of only the (stepping motor). FIG. 27 is a control flow in the groove line following individual pattern (discontinuous groove). In this case, since the paint is not sprayed to the discontinuous portion, the first stepping motor 45 (stepping motor) on the traveling carriage 43 is used.
During the rotation control process, when an absence of a groove is detected, an interrupt routine works and outputs an injection stop signal to the controller described later. Then, the rotation control of the first stepping motor 45 is continued according to the next data predicted from the input data recording, and when the presence of the groove is detected next, an injection restart signal is output to the controller. By doing so, a smooth coating process can be performed on the discontinuous groove.

FIG. 28 is a control flow in the groove line following individual pattern (continuous groove with varying groove width). In this case, when it is detected that the groove width has changed by comparison with the groove line data in advance, an interrupt routine works. For example, when it is detected that the groove width has begun to spread, paint is sprayed to the controller. Instructions are given to gradually increase the pressure so that the coating width corresponding to the groove width is secured. When it is detected that the groove width has started to narrow, an instruction is issued to gradually reduce the paint injection pressure to prevent the paint from being applied to the convex portions. Also, FIG.
Is a control flow in a groove line following individual pattern (a discontinuous groove whose groove width changes). In this case,
That is, the control flow in the case of a discontinuous groove, the above,
That is, it is controlled in combination with the control flow in the case of a continuous groove in which the groove width changes.

In the case of controlling the paint injection pressure as described above, instead of the paint feeding system by air pressure as shown in FIG. 19, a paint feeding system from the fuel tank to the painting nozzle is used. Adopt a pump system. That is, the paint injection pressure is controlled by controlling the paint feed amount of the paint pressure feed pump. In that case, A
Such an object is achieved by controlling the rotation speed of the C servo motor with an inverter.

FIG. 30 is a control flow of the controller in FIG. 20, in which the groove line pattern from the groove line data obtained by the image sensor after the solenoid for operating the pressurized air source 66 is operated.
The control of the paint ejection control patterns (1) to (4) according to That is, as shown in FIG. 31A, the ejection control pattern corresponds to the continuous groove, and the paint and air ejection solenoids are turned on. That is, the normally closed two-port valve 7 in the paint pipe 69.
The solenoid of 1 and the solenoid of the normally closed type two-port valve 61 of the air supply pipe 59 are both turned on,
Start painting.

As shown in FIG. 31 (2), the ejection control pattern corresponds to the discontinuous groove, and after the paint and air ejection solenoids are turned on, an instruction to stop ejection is issued from the controller. When the solenoid and are turned off, the coating is interrupted, and when the injection start instruction is given again, the solenoid and are turned on again.
And

As shown in FIG. 32, the ejection control pattern corresponds to the continuous groove in which the groove width changes.
After turning on the paint and air jet solenoids, when there is an instruction from the controller to gradually increase the paint injection pressure or to gradually decrease the paint injection pressure, the motor rotation speed of the paint pressure pump is changed. It is executed by controlling. FIG. 33 shows the injection control pattern in the case of the discontinuous groove in which the groove width changes, and in this case, the injection control pattern in the case of the discontinuous groove, and in the case of the discontinuous groove, Control is performed in combination with an injection control pattern in the case of continuous grooves having varying groove widths.

By operating the coating nozzle 10 and the coating device 40 having the coating nozzle 10 described above in accordance with the control flow described above, a building board having a coating pattern of a concave portion as shown in FIG. 1 and FIG. It will be understood that is obtained. However, in the above-described one, the coating of the concave groove running in the carrying direction of the building board can be performed as expected, but it cannot be applied as it is to the groove running in the direction orthogonal to the carrying direction. Therefore, the case of applying the coating according to the present invention to the building board A having both the vertical groove X and the horizontal groove Y as illustrated in FIG. 34b will be described below. FIG. 34a is a plan view showing this aspect, and FIG.
Is a control flow in the device. In this device, the first coating device 40A according to the present invention is arranged in a direction orthogonal to the transport direction of the building board A transported by the first transport device 31A.
Are arranged, whereby the coating of the longitudinal groove X is performed. When the painted building board A reaches the carrying end, the building board A is taken over by the second carrying device 31B orthogonal to the first carrying device 31A and carried in a direction intersecting 90 degrees. A second coating device 40B according to the present invention is arranged on the second transfer device 31B, and the second coating device 4B is provided.
The lateral groove Y is coated with 0B. In this case, since the vertical groove portion X has already been painted, control is performed so that the overlapping corresponding portions are not painted. Then, the painted building board is further carried by the second carrying device 31B and carried out to the outside. By repeating this process as needed, a desired coating pattern can be obtained even for a more complicated surface pattern.

Next, depending on the shape of the concave groove, there may be a bottom width that cannot be coated with only one coating nozzle described with reference to FIG. FIG. 36 shows an example of the coating device 40 used in such a case. This coating equipment 4
No. 0 has three coating nozzles, and the central coating nozzle 10B is the same as the coating nozzle 10 shown in FIG. 8 except that it does not have the left and right air ejection holes 23, 23. Air is not ejected, and the left and right two coating nozzles 10A and 10A are similar to the coating nozzle 10 shown in FIG. 8, but either one of the left or right air ejection holes is used. (That is, the coating nozzle 10B
It does not have an air ejection hole (closer to the air) 23 or does not eject air during use. Most of the bottom surface 2 (width W) of the concave portion is coated by the central coating nozzle 10B, and the bottom side portions 2a, 2a and side wall portions 3, 4 are coated by the left and right coating nozzles 10A, 10A. In this case, by controlling the spraying position and spraying angle for each of the left and right coating nozzles 10A, 10A, the side walls 3, 4 on the left and right of the concave portion are
It will be readily appreciated that a similar coating as described with reference to Figures 1 and 2 may be applied.

[0056]

As described above, according to the coating apparatus of the present invention, it is possible to obtain a building board having a high surface design which cannot be obtained by the conventional coating method. In particular, to give a strong shade to what you see, not only the linear shape, but also the curved concave shape and the complicated concave shape formed in the lateral direction on the surface of the building board. It is possible to perform various paintings, and thereby a building board that can exhibit high surface design can be obtained.

[Brief description of drawings]

FIG. 1 is an enlarged perspective view showing a concave portion of a building board to be coated by a coating apparatus according to the present invention.

FIG. 2 is an enlarged plan view showing a concave portion of another building board to be coated by the coating apparatus according to the present invention.

FIG. 3 is a view showing a cross section in a lateral direction of a concave portion of a building board which is coated by a coating apparatus according to the present invention.

FIG. 4 is a view showing a cross section in the lateral direction of another concave portion of a building board which is coated by the coating apparatus according to the present invention.

FIG. 5 is a view showing a plane shape of a concave portion of a building board which is coated by the coating apparatus according to the present invention.

FIG. 6 is a diagram showing a planar shape of another concave portion of a building board which is coated by the coating apparatus according to the present invention.

FIG. 7 is a view showing a plane shape of still another concave portion of the building board which is coated by the coating apparatus according to the present invention.

FIG. 8 is a sectional view illustrating a coating nozzle.

FIG. 9 is a diagram for explaining coordinate points and how to take them in a cross section in the lateral direction of the concave portion.

FIG. 10 is a diagram illustrating a method of controlling the angle of the position of the coating nozzle.

FIG. 11 is a diagram illustrating another control method of the angle of the position of the coating nozzle.

FIG. 12 is a diagram illustrating another example of coordinate points and a method of taking the cross section of the concave portion in the lateral direction.

FIG. 13 is a diagram illustrating still another example of coordinate points and a method of taking the cross section of the concave portion in the lateral direction.

FIG. 14 is a front view illustrating a usage mode of the coating apparatus according to the present invention.

FIG. 15 is a plan view illustrating a usage mode of the coating apparatus according to the present invention.

FIG. 16 is a side view illustrating an example of a coating apparatus according to the present invention.

FIG. 17 is a front view for explaining a coating nozzle support portion of the coating apparatus according to the present invention.

FIG. 18 is a perspective view illustrating an example of a coating apparatus according to the present invention.

FIG. 19 is a diagram showing a circuit diagram of air and a paint piping system in the coating apparatus according to the present invention.

FIG. 20 is a block diagram of the entire control system of the present coating system.

FIG. 21 is a control flow chart of the controller.

FIG. 22 is a control flow chart of the controller.

FIG. 23 is a diagram illustrating a state in which an edge portion of a concave groove is detected by an image sensor unit attached to a traveling carriage.

FIG. 24 is a diagram showing an overall flow of groove line follow-up control.

FIG. 25 is a view for explaining the control principle of moving the coating device following the groove line data.

FIG. 26 is a control flow chart in a groove line following individual pattern (continuous groove).

FIG. 27 is a control flow chart in a groove line following individual pattern (discontinuous groove).

FIG. 28 is a control flow chart of a groove line following individual pattern (continuous groove having a variable groove width).

FIG. 29 is a control flow chart in a groove line following individual pattern (a discontinuous groove in which the groove width changes).

FIG. 30 is a control flow chart of the controller.

FIG. 31 is a paint ejection control pattern corresponding to a continuous groove,
FIG. 6 is a diagram showing a paint ejection control pattern corresponding to a discontinuous groove.

FIG. 32 is a view showing a paint ejection control pattern corresponding to a continuous groove whose groove width changes.

FIG. 33 is a diagram showing a paint ejection control pattern corresponding to a discontinuous groove having a groove width that changes.

FIG. 34 is a plan view (FIG. 34) illustrating a coating apparatus for applying coating according to the present invention to a building board A (FIG. 34b) that has both vertical grooves X and horizontal grooves Y.

FIG. 35 is a control flow chart of the apparatus shown in FIG. 34.

FIG. 36 is a diagram illustrating a coating apparatus that is preferably used to coat a concave portion having a wide bottom surface.

FIG. 37 is a partial cross-sectional view illustrating a building board coated by a conventional method.

[Explanation of symbols]

A ... Building board, 5 ... Recessed groove, 2 ... Bottom surface (bottom area), 3, 4
... Side wall (side area), 10 ... Painting nozzle, 11 ... Paint ejection hole, 23 ... Air ejection hole, 25 ... Painting pattern, 26 ... Both ends of painting pattern, Ls ... Standard painting pattern width, hs
… Standard spray distance, α… Inclination angle of painting nozzle, M…
Horizontal movement distance of coating nozzle, 40 ... Painting device, 44 ... Painting nozzle support, 45, 46, 54 ... Stepping motor

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B05B 13/02 B05D 1/02 E04F 13/08

Claims (7)

(57) [Claims] Yusuke conveying means for conveying, and one or a plurality of coating nozzles for applying a coating to a concave portion formed on the surface of the building board to be conveyed by the conveying means 1. A building board
The coating nozzle is a central sprayer that sprays paint in a straightened state.
Along the discharge hole and one or both of the left and right side edges of the sprayed coating film.
It is a painting nozzle with an air ejection hole that ejects air.
Ri, the coating nozzles are freely adjusted its height and direction of injection
The height and spray direction of the coating nozzle
The information based on the cross-sectional shape of the concave portion
The central part of the paint film that spouts is the bottom of the concave part.
And the left and right side edges of the coating film are
The coating device for the concave portion of the building board, which is controlled so that it can be sprayed to the left and right side areas of the concave portion. 2. The building board according to claim 1, further comprising means for imaging the concave portion, and means for controlling the height and inclination angle of the coating nozzle based on information obtained from the imaging data. Coating device for concave parts. 3. The apparatus for coating a concave portion of a building board according to claim 1, further comprising means for detecting an edge portion of the concave portion. 4. The concave shape in the building board according to claim 3, further comprising means for controlling a position of the coating nozzle in a direction orthogonal to a conveying direction of the building board based on information from the detecting means. Coating equipment. 5. The apparatus for coating a concave portion of a building board according to claim 3, further comprising means for interrupting the spray of the paint from the coating nozzle based on the information from the detecting means. 6. The apparatus for coating a concave portion of a building board according to claim 3, further comprising means for changing a spray pressure of the coating material from the coating nozzle based on information from the detection means. 7. A plurality of the coating devices are arranged at different angles, and a building board is arranged to pass through the plurality of coating devices in succession. The coating device for the concave portion of the building board described in 1.