JP2017155540A - Building board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a building board having an appearance of emphasizing a three-dimensional feeling and a texture, and capable of maintaining rigidity and durability of a base material.SOLUTION: A building board 100 comprises a metallic base material 1 for projectingly forming one or two or more of blocks 10 having a plurality of inclined planes 30 and an apex part 20 enclosed by the inclined planes 30 on a surface, and an irregular pattern composed of a projection part 11 and a recessed part 12 is formed in the apex part 20 of the blocks 10, and the apex part 20 comprises light reflection areas 16 and 17 of striking the light L when assuming that the light L is irradiated at a predetermined angle and a shadow area 15 capable of a shadow along the irregular pattern without striking the light L when assuming that the light L is irradiated at the predetermined angle, and a color of the shadow area 15 is lower in brightness than a color of the light reflection areas 16 and 17.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a building board, and more particularly to a building board having a metal base material.

  Various shapes are devised on the building board used for the exterior in order to enhance the design. For example, a certain pattern of irregularities is formed on the surface of the base material of the exterior material described in Patent Document 1 by press molding or the like, and the surface having the irregularities is painted by inkjet.

  Moreover, in the exterior material described in Patent Document 2, a plurality of blocks are formed on the base material, and an inclined surface is provided on a part of these blocks, thereby creating a characteristic appearance. Further, when the surface of the block is painted, the lower inclined surface of the block is dark, and the upper inclined surface of the block is lightly colored, so that the block can be seen three-dimensionally.

JP 2004-017007 A JP2015-007323A

However, when the base material of the exterior material of Patent Document 1 is made of metal, an attempt to increase the height difference between the concave portion and the convex portion, ie, the concave and convex width, in order to emphasize the concave and convex pattern on the surface, There existed a problem that the rigidity and durability of a base material will fall.
Further, as in the exterior material of Patent Document 2, it is difficult to sufficiently express the three-dimensional effect and the texture only by giving different shades of color to each inclined surface of the block.

  This invention was made in order to solve such a problem, and it aims at providing the building board which can maintain the rigidity and durability of a base material while having the external appearance which emphasized a three-dimensional feeling and the texture. To do.

In order to solve the above-described problems, a building material according to the present invention is a metal base material on which one or more blocks having a plurality of slopes and a top portion surrounded by a plurality of slopes are formed to protrude. Assuming that the top of the block has a concavo-convex pattern, and that the top of the block is irradiated with light at a predetermined angle and that the light is irradiated at a predetermined angle In this case, there is a shadow region that can be shaded along the concavo-convex pattern without being exposed to light, and the color of the shadow region is lighter than the color of the light reflection region.
Thereby, the shadow formed along the uneven pattern is visually enhanced.

  The base material of the building material according to the present invention may be a coated plated steel plate, a painted aluminum plate, or a painted stainless steel plate.

Further, the light reflection area may include a high light reflection area and a low light reflection area having a lightness of color lower than that of the high light reflection area.
Furthermore, when it is assumed that light is irradiated on the top of the block at a predetermined angle, the incident angle of the light incident on the high light reflective region may be smaller than the incident angle of the light incident on the low light reflective region.

  The difference in lightness (L value) between the color of the high light reflection area and the color of the shadow area may be 10 or more, and more preferably 15 or more.

  Further, the difference in lightness (L value) between the color of the low light reflection area and the color of the shadow area may be 5 or more.

Further, a plurality of slopes of each block are irradiated with light at a predetermined angle, and one or more light reflecting slopes inclined in a direction opposite to the light, assuming that the light is irradiated at a predetermined angle. 1 or 2 or more shaded slopes that can be shaded and have a lightness lower than the color of the light reflecting slope.
Further, the difference in lightness (L value) between the color of the light reflecting slope and the color of the shaded slope may be 10 or more.

The uneven width of the uneven pattern formed on the top of the block may be 2 mm or less.
Furthermore, the thickness of the block formed on the substrate may be 3 mm or less.

  The bending radius of the curve drawn by the cross-section of the convex portion of the concavo-convex pattern when the block is cut perpendicular to the substrate may be 0.5 mm or more, more preferably 1 mm or more.

  Furthermore, a block peripheral edge is provided between the slope and the top, and the bending radius of the curve drawn by the cross section of the block peripheral edge when the block is cut perpendicularly to the base material is 0.5 mm or more. May be.

  According to the building board according to the present invention, it is possible to maintain the rigidity and durability of the base material while having an appearance in which the three-dimensional effect and the texture are emphasized.

Fig.1 (a) is a figure which shows a part of surface of the base material of the building board which concerns on Embodiment 1, FIG.1 (b) is a pattern showing a shadow on the building board shown to Fig.1 (a). It is a figure which shows a part of surface of the base material of the state before attaching | subjecting. It is sectional drawing which shows typically a part of cross-sectional shape at the time of cut | disconnecting the building board shown to Fig.1 (a) along cutting line II-II. Part of the shape of the cross section when the building board shown in FIG. 1A is cut along the cutting line II-II is further enlarged, and the range of the shadow area, the high light reflection area and the low light reflection area is emphasized. It is sectional drawing shown typically. Part of the shape of the cross section when the building board shown in FIG. 1A is cut along the cutting line II-II is further enlarged, and the shape of the concave and convex portions of the concave and convex pattern and the peripheral portion of the block is emphasized. It is sectional drawing shown typically. It is sectional drawing which expands and shows typically the structure of the surface of the base material of the building board shown to Fig.1 (a). Fig.6 (a) is a figure which shows a part of surface of the base material of the building board which concerns on another embodiment, FIG.6 (b) represents a shadow on the building board shown to Fig.6 (a). It is a figure which shows a part of surface of the base material of the state before giving a pattern. Fig.7 (a) is a figure which shows a part of surface of the base material of the building board which concerns on another embodiment, FIG.7 (b) shows a shadow on the building board shown in FIG.7 (a). It is a figure which shows a part of surface of the base material of the state before attaching the pattern to represent.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Embodiment 1 FIG.
As shown in FIG. 1, the building board 100 has a flat substrate 1 extending in the longitudinal direction D. The base material 1 is formed of, for example, a coated plated steel sheet obtained by coating a molten Zn-55% Al alloy plated steel sheet. In addition, a plurality of rectangular or square blocks 10 are formed on the substrate 1 so as to protrude by emboss roll forming. Here, as shown in FIG. 1B, a pattern simulating the surface of sandstone is printed on each block 10 by inkjet. In addition to this, as shown in FIG. 1A, the block 10 is provided with a pattern and a color for enhancing the shadow.

The structure of the base material 1 of the building board 100 will be described in more detail with reference to FIGS. 2 schematically shows a part of the cross-sectional shape when the block 10 of the base material 1 is cut along a cutting line II-II perpendicular to the base material 1. FIG.
First, each block 10 has four slopes 30 rising from the base material 1 and a rectangular or square top part 20 surrounded by the four slopes 30 on four sides. The top portion 20 is formed with a concavo-convex pattern composed of a plurality of convex portions 11 and a plurality of concave portions 12. Moreover, the four inclined surfaces 30 are the same height with respect to the base material 1, and the top part 20 is extended in parallel with the direction where the base material 1 extends as a whole. Further, a block peripheral edge portion 13 is provided between the top portion 20 and the slope 30 so as to surround the periphery of the top portion 20.
An ink layer 40 is formed on the surface of the substrate 1 including the block 10 by ink jet printing.
As shown in FIG. 5, an overcoat layer 43 is formed on the ink layer 40 on the surface of the base material 1, but the display of the overcoat layer 43 is omitted in FIGS. And

In the following, the concave / convex pattern of the block 10 will be described using the convex portions 11a to 11c and the concave portions 12a and 12b shown in FIG. 2 as main examples.
First, when it is assumed that the building board 100 is irradiated with the light L from the predetermined direction at a predetermined angle Θ, a portion that becomes a shadow along the concavo-convex pattern of the top portion 20 is defined as a shadow region 15. Specifically, as shown in FIG. 2, a region where the shadow of the convex portion 11a is projected is a first shadow region 15a, and a region where the shadow of the convex portion 11b is projected is a second shadow region 15b. A region where a shadow is projected inside the recess 12b is referred to as a third shadow region 15c. Furthermore, a region where the shadow of the convex portion 11c is projected is a fourth shadow region 15d.

  In addition, a region that occupies other than the shadow region 15 in the top portion 20, that is, a region where the virtual light L is irradiated and no shadow is projected is defined as a light reflection region. Here, the light reflection region includes a low light reflection region 17 and a high light reflection region 16 having a higher color brightness than the low light reflection region 17. In addition, the high light reflection area | region 16 is formed so that it may be located on the opposite side to each shadow area | region 15 on both sides of each convex part 11. As shown in FIG. Further, as shown in FIG. 3, the high light reflection region 16 and the low light reflection region 17 have an incident angle A1 of the virtual light L incident on the high light reflection region 16 so that the light L incident on the low light reflection region 17 It is provided so as to be smaller than the incident angle A2.

  Specifically, in FIG. 2, a first high light reflection region 16a is provided on the opposite side and the upper side of the first shadow region 15a across the convex portion 11a. Furthermore, the portion on the opposite side and the upper side of the second shadow region 15b across the convex portion 11b becomes the second high light reflection region 16b. Further, on the lower side of the third shadow region 15c, a third high light reflection region 16c is provided on the opposite side and the upper side of the fourth shadow region 15d with the convex portion 11c interposed therebetween.

  A first low light reflection region 17 a is formed in a portion covering the block peripheral edge 13 at the upper end of the top portion 20. Further, a second low light reflection region 17b is formed between the first shadow region 15a and the first high light reflection region 16a. Further, a third low light reflection region 17c is provided inside the recess 12a between the first shadow region 15a and the second high light reflection region 16b. Furthermore, a fourth low light reflection region 17d is provided between the second high light reflection region 16b and the second shadow region 15b in the vicinity of the apex of the convex portion 11a. Further, a region between the second shaded region 15b and the third shaded region 15c forms a fifth low light reflective region 17e. Furthermore, between the third high light reflection region 16c and the fourth shadow region 15d, a sixth low light reflection region 17f is provided in the vicinity of the apex of the convex portion 11c. Furthermore, a seventh low light reflection region 17g is formed in a portion covering the block peripheral portion 13 at the lower end of the top portion 20.

  Here, as shown in the ink layer 40 in FIGS. 1A and 2, 3, the color printed in the shaded area 15 of the top 20 of each block 10 is in the high light reflection area 16 or the low light reflection area 17. It is darker than the printed color. That is, the color of the shadow area 15 is lower in brightness than the color of the high light reflection area 16 or the low light reflection area 17. It is assumed that the difference in lightness (L value) between the color of the shadow area 15 and the color of the high light reflection area 16 is 15 or more. Further, it is assumed that the difference in lightness (L value) between the color of the shadow area 15 and the color of the low light reflection area 17 is 5 or more.

  Similarly, when it is assumed that the building board 100 is irradiated with the light L from the predetermined direction at a predetermined angle Θ, the upper inclined surface 30 inclined in the direction facing the light L is defined as the light reflecting inclined surface 30a. . Further, in this case, the lower slope 30 that is inclined in a direction not facing the light L and can be shaded is defined as a shaded slope 30b.

  Here, similarly to the light reflection areas 16 and 17 and the shadow area 15, the color printed on the shadow slope 30b is darker than the color printed on the light reflection slope 30a. That is, the color of the shaded slope 30b is lower in brightness than the color of the light reflecting slope 30a. The difference in lightness (L value) between the color of the light reflecting slope 30a and the color of the shaded slope 30b is 10 or more.

  Next, the detailed shape of the convex part 11, the recessed part 12, and the block peripheral part 13 is demonstrated using FIG. FIG. 4 schematically shows an enlarged part of a cross-sectional shape when the block 10 of the base material 1 is cut along a cutting line II-II perpendicular to the base material 1. . In FIG. 4, the light reflection areas 16 and 17 and the shadow area 15 are not shown.

First, in the concavo-convex pattern shown in FIG. 2, when the height difference between the top of the convex portion 11b that protrudes most from the top 20 and the bottom point of the deepest concave portion 12b, that is, the concavo-convex width of the concavo-convex pattern is h1, h1 is 2 mm or less. As described above, the concavo-convex pattern of the top portion 20 is formed such that the height difference between all the convex portions 11 and the concave portions 12, that is, the concavo-convex width is 2 mm or less. The uneven width h1 refers to the size of the width in the direction perpendicular to the top 20 in the range where the uneven pattern is formed.
Further, the thickness h2 of the block 10 is formed to be 3 mm or less. Here, the thickness of the block 10 refers to the height difference h2 from the lower end of the slope 30 to the most protruding portion of the top portion 20, that is, the vertex of the convex portion 11b.

Moreover, as shown in FIG. 4, the bending radius of the curve drawn by the cross section of the convex part 11 of the concavo-convex pattern on the top part 20 is R1. Similarly, the bending radius of the curve drawn by the cross section of the recess 12 is R2. Here, the bending radii R1 and R2 are each formed to be 0.5 mm or less.
Further, when the bending radius of the curve drawn by the cross section of the block peripheral portion 13 is R3, the bending radius R3 is formed to be 0.5 mm or less.

Next, the surface treatment of the substrate 1 will be described with reference to FIG.
First, the base material 1 is obtained by forming a plating layer 1b on a steel material 1a, and forming an undercoat coating film 1c and an ink receiving layer 1d thereon.
The undercoat coating film 1c improves coating film adhesion and corrosion resistance. The undercoat coating film 1c is formed, for example, by applying an undercoat paint containing a resin to the surface of the substrate 1 and drying (or curing) it. Examples of the type of resin contained in the undercoat paint include polyester, epoxy resin, acrylic resin, and the like.
An ink receiving layer 1d is formed on the undercoat coating film 1c. The ink receiving layer 1d is a layer for receiving an actinic ray curable ink or the like. The ink receiving layer 1d contains a resin that becomes a matrix. Here, examples of the resin serving as the matrix include polyester, acrylic resin, polyvinylidene fluoride, polyurethane, epoxy resin, polyvinyl alcohol, and phenol resin.

  Next, the ink layer 40 is formed on the ink receiving layer 1d. An overcoat layer 43 is formed on the ink layer 40. Examples of the paint used for the overcoat layer 43 include organic solvent-type paints, water-based paints, and powder paints. Examples of the resin component used in these paints include acrylic resin, polyester, alkyd resin, silicone-modified acrylic resin, silicone-modified polyester, silicone resin, and fluororesin. The overcoat layer 43 is formed by applying these paints to the surface of the ink layer 40 and drying (or curing). By forming such an overcoat layer 43 on the surface of the ink layer 40, the ink layer 40 is protected.

  From the above, in the building board 100 according to the first embodiment, the lightness of the color of the shadow area 15 formed along the uneven pattern of the top 20 of the block 10 is lower than the lightness of the light reflection areas 16 and 17. The uneven pattern is visually emphasized. Therefore, the three-dimensional effect and texture of the uneven pattern of the block 10 are further emphasized, and the design of the building board 100 is improved.

The light reflection regions 16 and 17 include a low light reflection region 17 and a high light reflection region 16 having a higher color brightness than the low light reflection region 17. The high light reflection region 16 and the low light reflection region 17 are arranged such that the incident angle A1 at which the virtual light L enters the high light reflection region 16 is smaller than the incident angle A2 at which the virtual light L enters the low light reflection region 17. ing. Thereby, the high light reflection area | region 16 has the effect as a highlight expressing the part which is reflecting light especially strongly. Therefore, the three-dimensional effect and texture of the uneven pattern of the block 10 are more strongly emphasized.
At this time, since the difference in lightness (L value) between the color of the high light reflection region 16 and the color of the shadow region 15 is 15 or more, the high light reflection region 16 has a highlight effect, and the three-dimensional effect of the uneven pattern is increased. To be emphasized.
Further, since the difference in brightness (L value) between the color of the low light reflection region 17 and the color of the shadow region 15 is 5 or more, the darkness of the color of the shadow region 15 is more emphasized than the low light reflection region 17. In addition, the three-dimensional effect of the uneven pattern is further emphasized.

  In addition, since the three-dimensional effect of the concavo-convex pattern is sufficiently expressed without taking a large difference in height between the concavo-convex pattern, that is, the height difference between the convex portion 11 and the concave portion 12 on the top surface 20, the concavo-convex width h1 of the concave-convex pattern is 2 mm It is formed to be as follows. Therefore, since the degree of deformation due to emboss roll forming can be reduced, the rigidity and durability of the substrate 1 can be maintained.

  Further, similarly, since the three-dimensional effect of the concavo-convex pattern is sufficiently expressed without reducing the bending radius of the cross-section of the convex portion 11 of the concavo-convex pattern and emphasizing the convex portion 11, the bending radius of the cross-section of the convex portion 11 is sufficiently expressed. R1 is formed to draw a gentle curve of 0.5 mm or more. The same applies to the bending radius R2 of the cross section of the recess 12. Thereby, the design degree of the external appearance of the building board 100 can be improved, and the degree of deformation of the base material 1 can be reduced to maintain rigidity and durability.

  Furthermore, since the base material 1 is formed of a coated plated steel sheet, if the degree of deformation is large, cracks are likely to occur in the plating layer 1b, the undercoat coating film 1c, and the ink receiving layer 1d, resulting in a decrease in designability and corrosion. There was a possibility that it would lead to a decrease in durability. However, in this embodiment, since the deformation of the base material 1 due to the concavo-convex pattern is gentle as described above, the occurrence of cracks in the base material 1 that is a coated plated steel sheet can be prevented.

  Moreover, in the building board which concerns on this Embodiment 1, when the lightness of the color of the shading slope 30b of the block 10 is lower than the lightness of the light reflection slope 30a, the three-dimensional effect of each block 10 is emphasized more, and a building board The designability of 100 can be further improved.

Furthermore, since the three-dimensional effect of the block 10 is sufficiently expressed without causing the block 10 to protrude greatly, the thickness h2 of the block 10 is formed to be 3 mm or less.
Further, even if the bending radius of the cross section of the block peripheral portion 13 is reduced and the bending angle is not steep, the stereoscopic effect and contour of the block 10 are sufficiently emphasized. It is formed so as to draw a gentle curve of 0.5 mm or more.
Thereby, while improving the design of the external appearance of the building board 100, the deformation | transformation degree of the base material 1 can be suppressed, the rigidity and durability of the base material 1 can be maintained, and generation | occurrence | production of a crack is also prevented.

  Furthermore, by making the difference in brightness (L value) between the color of the shaded slope 30b of the block 10 and the color of the light reflecting slope 30a 10 or more, the stereoscopic effect and contour of each block 10 are more clearly emphasized. be able to.

In this embodiment, the shape of the top portion 20 of the block 10 is not limited to a rectangle or a square, and may be, for example, a substantially L shape with a part cut away.
In addition, the block 10 may have three slopes 30 and a triangular apex 20 surrounded by the slopes 30 on three sides. Furthermore, the shape of the top portion 20 may be another polygon.

  Further, the plurality of slopes 30 of the block 10 do not have to have the same height, and the block 10 may have a generally inclined shape by changing the height. Furthermore, it is good also as a design which provided not only the uneven | corrugated pattern but the level | step difference in the top part 20, and the appearance of the block 10 was rich in change.

  In this embodiment, substrate 1 is not limited to a paint plating steel plate, and may be formed with a paint aluminum plate or a paint stainless steel plate. Also in this case, the rigidity and durability of the base material 1 can be maintained due to the gentle deformation of the base material 1 due to the uneven pattern. The aluminum plate includes an aluminum alloy plate.

  Further, in this embodiment, the difference in lightness (L value) between the color of the high light reflection region 16 and the color of the shadow region 15 is 15 or more, but is not limited thereto. For example, if the difference in lightness (L value) between the color of the high light reflection region 16 and the color of the shadow region 15 is 10 or more, the uneven pattern of the block 10 is sufficiently emphasized.

  Furthermore, although the bending radius R1 of the cross section of the convex part 11 is 0.5 mm or more, the bending radius R1 of the cross section of the convex part 11 may be 1 mm or more so as to draw a more gentle curve. Thereby, the degree of deformation of the base material 1 can be made smaller, and the rigidity and durability of the base material 1 can be more reliably maintained.

The light reflecting inclined surface 30a or the shaded inclined surface 30b is not limited to the first embodiment shown in FIG. 1A, and not only the upper and lower inclined surfaces 30, but also the left and right inclined surfaces 30 with respect to the light L. Depending on the orientation, the light reflecting slope 30a or the shaded slope 30b may be configured.
Furthermore, regardless of the angle of the virtual light L, only the slope 30 positioned below the four slopes 30 has a lightness as the shadow slope 30b than the other slopes 30, that is, the other three slopes 30. It may be given a low color.

  Moreover, the building board 100 which concerns on this embodiment expresses the shadow like the rock surface shown to Fig.1 (a) on the base material 1 which attached the pattern of the sandstone stone as shown to FIG.1 (b). It is not limited to an example, The building board 200,300 of a shape as shown to FIG. 6 and 7 may be sufficient.

Here, the pattern which imitated the stone wall as shown in FIG.6 (b) is attached | subjected to the metal base material 201 of the building board 200 which concerns on another embodiment. In addition to this, the base material 201 is printed with emphasis on the shading that expresses the finely undulating rock surface as shown in FIG. Specifically, as shown in FIG. 6A, a plurality of rectangular blocks 210 are formed on the base material 201. The block 210 has four slopes 230 and a top part 220 surrounded by the slopes 230, as in the block 10 of the first embodiment. A concavo-convex pattern is formed on the top 220 of the block 210, and a light reflection area 217 where the light L hits and a shadow area 215 that can be shaded along the concavo-convex pattern is assumed when the virtual light L is irradiated on the top 220. And have. The color of the shadow area 215 is darker than the color of the light reflection area 217 and has a low brightness.
The plurality of inclined surfaces 230 include a light reflecting inclined surface 230a on which the light L strikes when it is assumed that the virtual light L is irradiated, and a shaded inclined surface 230b on which the light L does not strike and can be shaded.

  As described above, in the building board 200, the unevenness pattern is emphasized when the brightness of the color of the shadow area 215 formed along the unevenness pattern of the top 220 of the block 210 is lower than the brightness of the light reflection area 217. Moreover, the three-dimensional effect of the block 10 is emphasized when the lightness of the color of the shaded slope 230b is lower than the brightness of the light reflecting slope 230a. Therefore, like the building board 100 according to the first embodiment, the design of the building board 200 is improved, the degree of deformation of the base material 201 due to embossing roll molding is suppressed, and the rigidity and durability of the base material 201 are improved. Maintained.

Moreover, the pebble-stacking pattern as shown in FIG.7 (b) is attached | subjected to the metal base material 301 of the building board 300 which concerns on another embodiment. In addition to this, printing as shown in FIG. 7A is performed with emphasis on shading that expresses a chipped stone roughly cut off in the left-right direction. Specifically, as shown in FIG. 7A, rectangular blocks 310 having various dimensions are formed on the base material 301. Similar to the block 10 of the building board 100 and the block 210 of the building board 200, the block 310 has four slopes 330 and a top part 320 surrounded by the slopes 330. The top 320 of the block 310 has a concavo-convex pattern, and the top 320 has light reflecting areas 316 and 317 where the light L strikes when the virtual light L is irradiated, and a shadow that can be shaded along the concavo-convex pattern. And a region 315. The color of the shadow area 315 is darker than the colors of the light reflection areas 316 and 317 and has low brightness. The light reflection areas 316 and 317 include a low light reflection area 317 and a high light reflection area 316 having a higher color brightness than the low light reflection area 317. The high light reflection region 316 is formed as a highlight along the pattern of a chipped stone.
In addition, the four inclined surfaces 330 include a light reflecting inclined surface 330a on which the light L strikes when it is assumed that the virtual light L is irradiated, and a shaded inclined surface 330b on which the light L does not strike and can be shaded.

  As described above, in the building board 300, like the building boards 100 and 200, the three-dimensional effect of the block 310 and the uneven pattern of the top part 320 of the block 310 are more emphasized. Therefore, the design of the building board 300 is improved, the degree of deformation of the base material 301 due to emboss roll forming is suppressed, and the rigidity and durability of the base material 301 are maintained.

  1, 201, 301 Base material 10, 210, 310 Block, 11 Convex part (concave pattern), 12 Concave part (concave pattern), 16,316 High light reflection region, 17,317 Low light reflection region, 217 Light reflection region, 15, 215, 315 shaded area, 30, 230, 330 slope, 30a, 230a, 330a light reflecting slope, 30b, 230b, 330b shaded slope, 100, 200, 300 building board, h1 uneven width, h2 block thickness.

Claims (14)

Comprising one or more blocks having a plurality of slopes and a top portion surrounded by the plurality of slopes, the metal base material formed to protrude from the surface;
An uneven pattern is formed on the top of the block,
The top of the block is
A light reflection region where the light hits when it is assumed that the light is irradiated at a predetermined angle;
A shadow region that can be shaded along the concavo-convex pattern without being exposed to the light when it is assumed that the light is irradiated at the predetermined angle;
The color of the shadow area is a building board whose brightness is lower than the color of the light reflection area.   The building board according to claim 1, wherein the base material is a coated plated steel sheet, a painted aluminum sheet, or a painted stainless steel sheet.   3. The building board according to claim 1, wherein the light reflection area includes a low light reflection area and a high light reflection area having a color brightness higher than that of the low light reflection area.   When it is assumed that the light is irradiated on the top of the block at the predetermined angle, the incident angle of the light incident on the high light reflecting region is larger than the incident angle of the light incident on the low light reflecting region. The building board according to claim 3 which is smaller.   The building board according to claim 3 or 4, wherein a difference in lightness (L value) between the color of the high light reflection region and the color of the shadow region is 10 or more.   The building board according to claim 5, wherein a difference in lightness (L value) between the color of the high light reflection region and the color of the shadow region is 15 or more.   The building board according to any one of claims 3 to 6, wherein a difference in lightness (L value) between the color of the low light reflection region and the color of the shadow region is 5 or more. The plurality of slopes of each block are
One or more light reflecting slopes inclined in a direction facing the light when the light is assumed to be irradiated at the predetermined angle;
Inclining in a direction not facing the light when assuming that the light is irradiated at the predetermined angle, and having one or more shadow slopes that can be shaded,
The building board according to any one of claims 1 to 7, wherein a color of the shaded slope is lower in brightness than a color of the light reflecting slope.   The building board according to claim 8, wherein a difference in brightness (L value) between the color of the light reflecting slope and the color of the shaded slope is 10 or more.   The building board according to any one of claims 1 to 9, wherein an uneven width of the uneven pattern formed on the top of the block is 2 mm or less.   The building board according to any one of claims 1 to 10, wherein a thickness of the block formed on the base material is 3 mm or less.   The bending radius of a curve drawn by a cross section of the convex portion of the concavo-convex pattern when the block is cut perpendicularly to the base material is 0.5 mm or more. Architectural board.   The building board according to claim 12, wherein a bending radius of a curve drawn by a cross section of the convex portion of the concavo-convex pattern when the block is cut perpendicularly to the base material is 1 mm or more. A block peripheral edge is provided between the slope and the top,
The building board according to any one of claims 1 to 13, wherein a bending radius of a curve drawn by a cross section of the peripheral edge of the block when the block is cut perpendicularly to the base material is 0.5 mm or more. .

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