JP2005226267A - Building board and building board printing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a building board which can make pattern misalignment inconspicuous at a joint portion between external wall boards adjacent to each other when the building boards are applied to an external wall, even if the building board has a relatively clear print image reproduced thereon. <P>SOLUTION: According to the building board, a colored texture pattern is selected such that high-definition areas are not arranged adjacent to each other at the joint portion of the building boards after finishing of the building boards as the external wall. More specifically, the colored texture pattern is determined such that the building board including a high-definition area along any of four sides thereof positively has a low-definition area in the vicinity of a side opposite thereto (a side on which the side including the high-definition area abuts longitudinally or laterally). Thus even if the pattern of the board is offset from the pattern of the board adjacent thereto, the two boards are not arranged such that the high-definition areas are adjacent to each other at the joint portion, and therefore the pattern misalignment is made inconspicuous. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a building board printing apparatus using inkjet printing technology and a building board printed by the building board printing apparatus, and more particularly to a building board even when a relatively clear printed image is to be reproduced. The present invention relates to a building board printing apparatus capable of making a pattern shift of a connection portion between adjacent outer wall boards inconspicuous when applied to an outer wall surface, and a building board printed by the building board printing apparatus.

  (1) As an exterior wall design when constructing an exterior wall of a building with a large number of building boards, a natural appearance such as a rock surface tone or a masonry tone is often preferred. The ink jet printing method is effective for such a requirement. If this printing method is used, when a large number of building boards to be used for exterior wall construction are industrially printed, a pre-stored color pattern pattern can be expressed for each building board. Since it is possible, a color pattern can be changed for every board. As a result, it is possible to eliminate the necessity of repeating the same color pattern as in the case of using a general gravure offset printing method. When an appropriate color pattern is designed, it is possible to effectively eliminate monotonousness and discomfort for the viewer when the printing plate is installed on the outer wall, and a more natural appearance can be produced.

  In the gravure offset printing, there are methods disclosed in Patent Document 1, Patent Document 2, Patent Document 3, and the like as a method for avoiding the repetition of the same color pattern, but it takes a considerable number of days to produce the gravure plate. Therefore, in particular, the ink jet printing method is not suitable as a printing method corresponding to a small lot and a variety of products.

  (2) Next, according to the inkjet coating method (see Patent Document 4), a “blurred color pattern” can be developed. Blur color patterns have been widely used as exterior wall designs to give a natural feel. And since this blurred color pattern can make the connection part between two adjacent outer wall boards inconspicuous when constructing a coating board on an outer wall, it can produce a more natural view.

  (3) However, such a “blurred color pattern” is merely a “blur pattern”. For example, when a color pattern with an image resolution of about the gravure offset printing is required, it is no longer possible to cope with it. .

  Further, even if the monotonous sensation can be avoided by changing the color pattern of each sheet by the above-described ink jet printing method, the point of making the connecting portion between the two adjacent outer wall plates inconspicuous is not solved.

  In order to express the view of nature in the exterior wall design, not only the resolution of the image and the repetition of the pattern, but also the fact that the connection between the board and the board is not conspicuous when the exterior wall board is constructed must be considered. I must.

  (4) When a pattern pattern that partially expresses a rectangular image area, such as a brickwork pattern or a tiled pattern, is developed instead of a blurred color pattern pattern, the color pattern pattern between adjacent boards is devised. By doing so, it is necessary to eliminate the change of the color pattern at the connection portion and to express the natural view (see Patent Document 5).

  However, especially in the rectangular image, the pattern displacement between the left and right plates is conspicuous with the joint portion between the left and right plates applied being sandwiched. When adopting the conventional construction method of placing a sealing material on such a joint part, even if there is a slight pattern shift, the sealing material makes it somewhat inconspicuous, but depending on the sealing material placing part The color pattern that appears on each plate is divided on the entire outer wall surface, and it is not possible to produce a natural view.

(5) On the other hand, when adopting a four-way joint-type outer wall plate (see FIG. 2 (a)), the vertical and horizontal joints are the upper lower side 22a and the right side on the upper side of the plate. This is because the lower upper solid 22c formed on the lower side of the plate to be joined and the left upper real 22b formed on the left side are overlapped with the right lower solid 22d formed in the portion. In addition, it is possible to effectively make the joint joint portion inconspicuous without placing a sealing material, and to express a good natural view.
Japanese Patent No. 3297351 Japanese Patent No. 3214565 Japanese Patent No. 3402297 Japanese Patent No. 2784529 Japanese Patent No. 3284037

  (1) However, even when such a four-way joint-type outer wall plate is adopted, the above-described pattern displacement cannot be avoided. Even when printing is performed using the ink jet printing method, the printed image region 23 is inevitably misaligned even though the printed portion is correctly printed (see FIG. 2B). This is because vertical and horizontal dimension errors occur in each sheet due to the accuracy of cutting and cutting in manufacturing the cement substrate. Specifically, the dimension 1 of the handle 21 matches relatively accurately, but the dimension of the plate itself has an error such as L or L ′. That is, in the four-way joint-type plate, the fastening metal fitting 24 is engaged with each of the real parts formed at the upper, lower, left and right side ends, and is fastened. The outer wall portion is formed by fixing it to a portion where each corner portion of the butt is abutted and fixing it to a column (structural frame or trunk edge fixed thereto) located on the rear surface thereof. The fixed position is determined only by the position of the real part formed on the plate, and is not directly related to the handle portion 21 on the plate surface. Therefore, the pattern deviation cannot be absorbed by the clasp 24.

  However, in the case of a general butting joining method (a method of placing a sealing material on the joint joint) instead of the four-way joint joining method, the fixing position of the clasp 24 is adjusted to a certain extent. The misalignment can be adjusted, but the above-mentioned defect of the pattern division cannot be solved.

  (2) The present invention has been made in view of the present situation, and is relatively clear that cannot be expressed by conventional blur coating means (which is expressed mainly by chemical means using a solvent). Even when a printed image is to be reproduced, when the building board is constructed on the outer wall surface, the building board printing apparatus and the building board can make the pattern misalignment of the connecting portion between adjacent outer wall plates inconspicuous An object is to provide a building board printed by a printing apparatus.

  In addition, by using the inkjet printing means, by changing the color pattern of each plate, the monotonous feeling of the entire outer wall design is eliminated, and as a result, the outer wall is made conspicuous in the joining line. It is possible to form a difficult seamless design appearance.

  The building board of the present invention includes a first printing region that is inkjet-printed by a first pixel that is composed of a first number of dots, and a second pixel that is composed of a second number of dots that is less than the first number. And a second printing region that is inkjet-printed, and the vicinity of the side that is connected to the second printing region on the side of the building board adjacent after construction is the first printing region.

  In addition, the building board printing apparatus of the present invention has a pattern pattern storage means for storing a pattern to be printed on the building board, and the vicinity of the side connected to the high-resolution printing area on the side of the building board adjacent after construction is low. An area resolution storage means for storing the resolution of each area to be printed on the building board as if it is a resolution printing area, a pattern stored in the pattern pattern storage means, and a memory stored in the area resolution storage means The resolution of each print area is read out, and in accordance with the resolution and pattern of each print area, a first pixel composed of a first number of dots is formed in the low resolution print area, and the high resolution In the printing area, a pixel forming unit that forms a second pixel composed of a second number of dots smaller than the first number, and an ejection control unit that controls ejection of ink by the pixel formed by the pixel forming unit Equipped with a.

  In addition, since the first pixel includes a plurality of second pixels, the printing area of the building board can be filled with pixels of different sizes without a gap.

  According to the present invention, even if the pattern portion of the board is displaced from the adjacent board as a result of construction, the displacement is made inconspicuous because the high resolution areas are not in contact with each other at the joint. it can.

  In the present invention, the basic nozzle arrangement is set to a nozzle pitch capable of expressing high resolution, and nozzles having the same diameter are arranged at the same pitch so as not to complicate the ink supply surface.

  According to the present invention, in terms of the nozzle arrangement, the resolution is basically the same, but when the printed outer wall plate is viewed, the resolution seems to be partially different. Can be. That is, the “apparent resolution” can be partially changed on the design surface of one plate.

  This apparent resolution is captured by a sensory measure of the sharpness of the printed image. Specifically, the sharpness of the printed image can be expressed by the size of the pixels constituting the image. The printing resolution and the gradation that can be expressed are determined by how many printing dots each pixel is composed of.

  In the present invention, the print dot diameter is made relatively small so that the entire print image has basically the same diameter and the same nozzle pitch, and is not changed. However, it is possible to change the sharpness of the printed image by changing the size of the pixel (the size of the printing area of one pixel, which also determines the number of dots of the pixel).

  If the printing resolution is lowered, the present invention can effectively solve the conventional problem that the degree of exposure of the printing background increases, the color mixing effect of the background color is unavoidable, and the color tone is changed. This is because the print base can be substantially covered with fine print dots by using a high resolution. Moreover, the sharpness of the image can be changed.

  In the present invention, since the diameters of all the print dots in the print image are basically the same, the pixels are configured as a set of print dots having the same diameter. Therefore, if the size of the pixel is replaced with the size of the print area, the size of the pixel can be freely changed by changing the size of the print area.

  Further, with regard to the pattern shift, it is the human eye that feels the pattern shift, and not the pixel shift, but the image shift constituted by the pixels is identified. Since the image is expressed as a planar area, the positional deviation between the opposed image areas in the vicinity of the joint between the left and right plates is identified.

  If there is a pattern displacement of 1 mm in the vertical direction, a number of printing dots corresponding to the printing resolution are printed between 1 mm. For example, when printing is performed at 600 dpi (dot per inch), 600 / 25.4≈24 printing dots are printed per 1 mm (see FIG. 3).

  For example, if one pixel is formed with 6 × 6 = 36 printing dots, the unit image area A of 1 mm × 1 mm is composed of 4 × 4 = 16 pixels, and thus the displacement of 1 mm is equivalent to 4 pixels. Misaligned. Here, if the pixel size is increased, that is, if the number of pixels constituting the unit image area is reduced, the number of pixels constituting the pattern deviation can be reduced. As a result, an image with low image definition is formed.

  Therefore, according to the present invention, as a result of construction, a color pattern is selected so that high-resolution regions are not adjacent to each other in a portion where adjacent plates are joined. That is, on the four sides of the board, the pattern pattern should be designed so that the resolution is always low in the neighboring area of the opposite side (the side where the board adjacent to the top and bottom or the left and right sides touches) in the part where the high resolution area exists. To choose. Thereby, even if the pattern portion of the board is displaced from the adjacent board, the displacement can be made inconspicuous because the high resolution regions are not in contact with each other at the joint. In the present invention, the shift is made inconspicuous by devising the resolution, and what kind of pattern is used is arbitrary.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a block diagram showing a configuration of a building board printing apparatus according to an embodiment of the present invention. The building board printing apparatus according to the present embodiment mainly includes a pattern design storage unit 11, an area resolution storage unit 12, a pixel formation unit 13, and an ejection control unit 14. The pattern storage means 11 is a RAM (Random Access Memory) that stores a pattern to be printed on the printed surface of the building board in order to determine the on / off pattern of each inkjet nozzle on the printing horizontal line orthogonal to the building board conveyance direction. And so on. The area resolution storage means 12 is also a memory such as a RAM for storing the resolution for printing on the printing surface of the building board in order to determine the on / off pattern of each inkjet nozzle, that is, the size of the pixel, that is, the number of dots of the pixel. is there. The pixel forming unit 13 reads the pattern stored from the pattern storage unit 11, reads the resolution stored from the area resolution storage unit 12, and outputs pixel data according to the resolution and the pattern in each region. Form. Specifically, in an area designated as high resolution, pixel data is formed by reducing the print area of one pixel and reducing the number of inkjet dots of one pixel. In the area designated as low resolution, the pixel data is formed by enlarging the printing area of one pixel and increasing the number of ink-jet dots of one pixel (described in detail in FIG. 4 and subsequent figures). For this reason, regarding the gradation expression, the number of steps is small in the area designated as high resolution, and the number of steps is large in the area designated as low resolution. The ejection control unit 14 controls on / off of ink ejection from the inkjet nozzles based on the pixel data formed by the pixel forming unit 13.

  FIG. 4 is an enlarged view showing two unit image region rows I and II facing each other across a joint line after construction of a building board according to an embodiment of the present invention. The unit image area A has a 16-pixel configuration and the unit image area B has a 4-pixel configuration, both of which are square areas of 1 mm × 1 mm (having the same area). The state shown in this figure is an arrangement that becomes a reference state without deviation.

The two unit image regions facing each other have an image design so that there is only a combination of {A, B} or {B, B} as shown below, and a combination of {A, A} is never formed. That is, there is no portion in which the high resolution area → the high resolution area continues from left to right.
The unit image area row I is from the top → B → B → B → A → B → B → B → A → B →
The unit image area column II is from the top: B → A → B → B → B → A → B → B → B →
And is arranged.

FIG. 5 is a diagram showing a state in which the unit image region II is shifted upward by half (0.5 mm) from the reference state shown in FIG. In this state, each unit image region sequence is opposed to the unit image region in order from the top as shown below.
Row I Row II
B 1/2 (B, A)
B 1/2 (A, B)
B B
A B
B 1/2 (B, A)
B 1/2 (A, B)
B B
A B
B
Thus, the combination of {A, A} is never formed.

FIG. 6 is a diagram illustrating a state in which the unit image region sequence II is shifted upward (1.0 mm) from the reference state illustrated in FIG. 4 by the unit image region.
The unit image area row I is from the top → B → B → B → A → B → B → B → A → B →
The unit image area sequence II is from the top: A → B → B → B → A → B → B → B →
In this case, the combination of {A, A} is not formed.

FIG. 7 is a diagram illustrating a state in which the unit image region II is shifted downward by half (0.5 mm) from the reference state illustrated in FIG.
Row I Row II
B B
B 1/2 (B, A)
B 1/2 (A, B)
A B
B B
B 1/2 (B, A)
B 1/2 (A, B)
A B
B B
Thus, the combination of {A, A} is never formed.

FIG. 8 is a diagram illustrating a state in which the unit image region row II is shifted downward (1.0 mm) by the unit image region from the reference state illustrated in FIG.
The unit image area row I is from the top: B → B → B → A → B → B → B → A → B →
The unit image area column II is as follows from the top:... → B → A → B → B → B → A → B → B → B →
In this case, the combination of {A, A} is not formed.

  As described above, when the image is designed as shown in FIG. 4, even when the right side plate is shifted by ± 1 mm in the vertical direction with respect to the left side plate, the plate in which the high resolution area is never adjacent. It is not continuous at the boundary part.

  FIG. 9 is an enlarged view of two unit image region rows facing each other across a joint line after construction of a general building board. As shown in FIG. 9, in the case of a general building board, when a pattern displacement of +1 mm (see FIG. 9 (a)) or a pattern displacement of -1 mm (see FIG. 9 (b)) occurs, Since the high-resolution print image (image in the case of the unit image area A) in the vicinity of the left and right end portions of the adjacent plate (left side 1 mm + right side 1 mm = 2 mm) is translated in pixel units over the entire vertical direction. The pattern deviation is clearly recognized.

  That being said, when the width of 2 mm in the vicinity of the left and right side edges of the adjacent plate is entirely composed of the unit image region B, the image of the boundary portion is blurred, and the high resolution image portion that is the center of the plate The difference (discomfort) is clearly recognized.

  In the unit image region rows I and II shown in FIG. 4, the unit image region A is regularly introduced into the row, so that the uncomfortable feeling is alleviated.

  FIG. 10 is an enlarged view of an image area facing each other across a joint line after construction of a building board according to another embodiment of the present invention. Preferably, as shown in FIG. 10, the unit image region sequence Ia at the position where one unit image region sequence ΔL (high resolution image region) of the same width is opened on the left side of the unit image region sequence I is the same as the unit image. The number of unit image regions B in the unit image region columns I and II in the unit image region column IIa at the position where one unit image region column ΔR (high resolution image region) having the same width is opened on the right side of the region column II If a predetermined number of unit image regions B that are smaller than the number are randomly arranged, the sense of discomfort in the image of the boundary line portion is further reduced. The unit image region rows ΔL and ΔR are provided because when the unit image region B is partially arranged in this row, the unit image region B extends from 3 to 3 over the unit image region rows ΔL, I, II, and ΔR. This is because there is a possibility that four consecutive, and in such a case, there is a risk of giving a sense of incongruity.

  Note that if the pixel size exceeds 1 mm, the sense of discriminating the pattern displacement of 1 mm is sufficiently absorbed, but the image resolution at the center will be considerably lowered, so it will be expressed. The print image range is narrowed. That is, when printing at 600 dpi as described above, one pixel is formed with the vertical printing x horizontal printing = 24 x 24 = 576 huge printing dots, and the pixels having a larger diameter than that are formed. In this case, the advantages of the original clear image representation by ink jet printing are completely destroyed.

  In the present invention, the pattern displacement of 1 mm is not changed the pixel size of the whole image, but “the same sharpness, that is, the same size, from the left board to the right board across the connecting line (boundary joint)”. The pattern shift is conspicuous when the image composed of pixels is opposed to each other. Furthermore, “a slight pattern shift of 1 mm is felt for the first time when looking away from the outer wall surface. In view of the fact that the relative positional relationship between the entire image of the board arranged on the right side and the entire image of the board arranged on the right side is recognized by comparison, the pattern deviation is felt. This is an attempt to develop a blurring effect.

  Next, how to control the printing of the unit image area A and the unit image area B will be described.

  Each pixel has a unique color. It is formed by a set of a plurality of printing dots composed of CMYK (Cyan Magenta Yellow BlacK) 4 basic colors constituting the same.

  The vertical image area formed by the left and right unit image area rows I and II sandwiching the joint line JL is a slight range of about 2 mm on the left and right, and this small range of image is greatly larger than the main image of the board. It does not affect. Specifically, the unit image region row I merely forms a substantially contour image of the right end portion of the left plate, and the unit image region row II is merely a portion of the left end portion of the right plate. It only forms a contour image.

  Therefore, in creating the print control data, first, after forming the entire image in the unit image area A which is a high resolution area, the unit image area A at a predetermined position in the boundary portion where the unit image area B is to be arranged. The color mixture calculation is performed on That is, in order to convert from 16 pixels to 4 pixels, a calculation is performed in which 4 pixels are combined into 1 pixel. Next, CMYK color separation is performed at the resolution of the unit image area B based on the color mixture value. Here, the expression control data of the unit image areas A and B by CMYK color dots of the determined printing resolution are obtained.

  The present invention is not limited to the above embodiment.

It is a block diagram which shows the structure of the building board printing apparatus by one embodiment of this invention. It is a figure explaining the pattern shift of the conventional building board. It is a figure explaining the relationship between a unit image area | region, a pixel, and a printing dot. It is a figure which expands and shows two unit image area | region row | line | columns I and II which oppose on both sides of the joint line after construction of the construction board by one embodiment of this invention. FIG. 5 is a diagram illustrating a state in which the unit image region is shifted by half (0.5 mm) upward in the unit image region row II from the reference state illustrated in FIG. 4. FIG. 5 is a diagram showing a state in which the unit image region row II is shifted upward by a unit image region (1.0 mm) from the reference state shown in FIG. 4. FIG. 5 is a diagram showing a state in which the unit image region is shifted by half (0.5 mm) downward in the unit image region row II from the reference state shown in FIG. 4. FIG. 5 is a diagram illustrating a state in which the unit image region row II is shifted downward by a unit image region (1.0 mm) from the reference state illustrated in FIG. 4. It is a figure which expands and shows two unit image area | region rows which oppose on both sides of the joint line after construction of a general building board. It is a figure which expands and shows the image area | region which opposes on both sides of the joint line after construction of the construction board by other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Pattern design memory | storage means 12 Area | region resolution memory | storage means 13 Pixel formation means 14 Injection control means JL Joint joint line

Claims (4)

A first print area that is inkjet printed with a first pixel comprising a first number of dots;
And a second print area that is inkjet-printed by a second pixel comprising a second number of dots less than the first number, and connected to a second print area on the side of an adjacent building board after construction A building board characterized in that the vicinity of the side to be printed is the first printing area.   The building board according to claim 1, wherein the first pixel includes a plurality of second pixels. A pattern storage means for storing a pattern to be printed on a building board;
Area resolution storage means for storing the resolution of each area to be printed on the building board so that the vicinity of the side connected to the high resolution printing area on the side of the building board adjacent to the construction board is a low resolution printing area;
The design pattern stored in the design pattern storage means and the resolution of each print area stored in the area resolution storage means are read out, and the low resolution is selected according to the resolution and the pattern of each print area. In the print area, a first pixel composed of a first number of dots is formed, and in the high-resolution print area, a second pixel composed of a second number of dots smaller than the first number is formed. Pixel forming means;
A building board printing apparatus, comprising: an ejection control unit that controls ejection of ink by pixels formed by the pixel forming unit. The building board printing apparatus according to claim 3, wherein the first pixel includes a plurality of second pixels.

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