JP4840292B2 - Plate-like building material painting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plate-like construction material coating method suitable for preventing deposition of ink droplets discharged out of an ink jetting port of ink-jet coating means for surface coating of a plate-like construction material on the edge face. <P>SOLUTION: The plate-like construction material coating method is employed for coating surface rim part 11a of a plate-like construction material 10 having a rectangular shape as a plane view by discharging ink droplets out of the ink jetting port 22d of ink-jet coating means 22 and involves operating suction means 40 arranged near the rim face 12 of a side of the plate-like construction material and discharging the ink droplets out of the ink jetting port toward the surface rim part of the side while relatively moving the ink discharge port and the plate-like construction material along the side to coat the surface rim part. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a plate-shaped building material coating method in which a plate-shaped building material is coated by an inkjet coating means.

The surface (upper surface) and the end surface (cut end surface) of a plate-shaped building material (plate-shaped building material) used for building interior materials and exterior materials are painted by various coating methods.
Recently, as one method of painting, ink jet painting that can easily form a local pattern or paint a desired pattern is used.
In such an ink-jet coating, ink droplets are ejected from the ink ejection port in a non-contact state on the surface of the plate-shaped building material to land the ink droplets on the surface to be painted, and a set of minute dots by the landed ink droplets The pattern is formed by.

For example, Patent Document 1 below proposes a method for painting a building board using inkjet painting.
In this configuration, a computer for storing pattern data of a pattern to be painted on a building board, a conveyor for conveying the building board, a painting head disposed above the conveyor, and a coating head in parallel. By spraying ink based on the pattern pattern data from a plurality of jet nozzles that have been arranged to make no contact with the surface of the building board conveyed on the conveyor, the pattern is painted. Yes.
Japanese Patent No. 3115136

By the way, the ink droplets ejected from the ink ejection port are ejected in a liquid column shape and are separated into a plurality of minute ink droplets by the surface tension and air resistance of the ink liquid itself before landing on the surface to be coated. It becomes a mist shape until it reaches the surface to be coated.
In addition, as the pattern becomes more complex, the ejected ink droplets also tend to be miniaturized. When ejected, these minute ink droplets become mist-like and float and fall toward the surface to be coated. .

As in the method for coating a building board described in Patent Document 1, ink is ejected from a jet nozzle that is not in contact with the building board. Therefore, in conventional inkjet painting, the entire surface is painted. In the meantime, there is a problem that the ink droplets that are mist-like as described above float and fall outside the surface of the building board and adhere to the end face of the building board near the periphery of the surface.
In this way, when the ink droplets ejected for surface coating adhere to the end surface of the building board, when the end surface is painted in the previous and subsequent steps, the end surface is double coated and compared to the surface. There is a risk that the color becomes dark or the quality of the pattern on the end face deteriorates.

  In addition, the surface of the plate-shaped building material may be uneven rather than smooth, compared to paper that is the target of printing with ordinary inkjet printers, and the plate-shaped building material is large compared to paper, etc. When the building material and the ink discharge port are moved relative to each other, they may be displaced relatively up and down. Therefore, the distance between the ink discharge port for discharging ink droplets and the surface to be coated is relatively large. There is a need. Even in such a case, the above-mentioned problem becomes remarkable.

  The present invention has been made in view of the above circumstances, and is a plate-shaped building material coating method capable of preventing adhesion of ink droplets ejected from ink discharge ports of an ink jet coating means to the surface of a plate-shaped building material. The purpose is to provide.

In order to achieve the above-mentioned object, the plate-shaped building material coating method according to the present invention is configured to discharge the ink droplets from the ink discharge port of the ink jet coating means so that the surface edge of the plate-shaped building material having a substantially rectangular shape in plan view is formed. A plate-shaped building material coating method for painting, wherein the suction means arranged in the vicinity of the end face of the side edge of the plate-like building material is operated to separate from the end face of the side edge, and the end face of the side edge The ink discharge port and the plate-shaped building material are relatively moved along the side edge in a state where a horizontal or obliquely upward air flow is generated in the vicinity, and the ink discharge toward the surface edge of the side edge. Ink droplets are ejected from the outlet to coat the surface edge.

Here, the plate-like building material has a plate-like substantially rectangular parallelepiped shape having an end face (a front end), and is a wooden building material, a resin-based building material, or a ceramic building used as an interior building material or exterior building material of a building. Refers to material.
Examples of the wood-based building materials include solid wood, laminated wood, plywood, particle board, wood fiber board, and the like, and those using a veneer or melamine resin as a base material.
Examples of the resin-based building material include a thermosetting resin material and a thermoplastic resin material.
Examples of the ceramic building materials include bricks, tiles, ceramics, and cement ceramic materials containing cement as a main component and reinforcing fibers and inorganic fillers, which are used for outer walls, roofs, fences, and the like.
The plate-like building materials are used for doors, floors, stairs, fences, columns, handrails, shelves, kitchen panels, ceilings, cabinets and top plates for various furniture, inner walls, outer walls, roofs, fences, and the like.
Examples of the pattern applied to the surface edge of the plate-shaped building material by the ink jet coating means include woodgrain, tile, block, single color, and other various patterns.

In the plate-shaped building material coating method of the present invention, the suction means may include a suction nozzle having a suction port that opens toward an end surface of the plate-shaped building material.
Moreover, in the said plate-shaped building material coating method of this invention, it is good also considering the said suction means as the structure which produces the airflow which goes diagonally upwards in the end surface vicinity of the said side.

  According to the plate-shaped building material coating method according to the present invention, the ink is discharged toward the surface edge of the side edge of the plate-shaped building material and becomes a mist as described above and floats and falls off the surface of the plate-shaped building material. The droplet is guided in a direction away from the end face of the side by an air flow generated in a direction away from the end face of the side by the suction means. As a result, it is possible to reduce the ink droplets ejected toward the surface edge of the side edge from adhering to or coming around to the end face of the side edge. As a result, when the end surface is painted before and after the surface of the plate-shaped building material is painted, the end surface is double coated and darker than the surface, and the quality of the pattern on the end surface is reduced. Can be reduced. Therefore, the plate-shaped building material with high designability can be provided.

Further, if the suction means includes a suction nozzle having a suction port that opens toward the end surface of the side, the ink droplets that float and fall outside the surface of the plate-shaped building material described above It can be separated from the end face of the side and sucked.
Further, if the suction means is configured to generate an airflow that is obliquely upward near the end face of the side, the airflow formed by the suction means is obliquely upward from the end face. Thereby, the ink droplet which floats and falls outside the surface of the said plate-shaped building material toward the vertically downward direction with dead weight can be separated from this end surface more efficiently.

The best mode for carrying out the present invention will be described below with reference to the drawings.
Drawing 1 is an explanatory view for explaining the tabular building material coating method concerning a 1st embodiment, (a) is a schematic plan view and (b) is a schematic longitudinal section. FIG. 2 is a block diagram illustrating an example of a plate-shaped building material coating apparatus that executes the plate-shaped building material coating method according to the embodiment. FIG. 3 is an explanatory diagram for explaining the process of painting the center of the surface of the plate-shaped building material with the plate-shaped building material coating apparatus, and FIG. 4 is the process of painting the end surface of the plate-shaped building material with the plate-shaped building material coating apparatus. It is explanatory drawing for demonstrating.
In addition, in FIG.1 (b), FIG.3 (b), FIG.4 (b), and FIG.5 (b), the ink droplet discharged from the ink discharge port of each nozzle head is shown typically.

In this embodiment, the plate-shaped building material 10 painted by the plate-shaped building material coating apparatus A is formed into a substantially rectangular parallelepiped shape having an end face (cut end surface) 12, and is made of wood such as laminated wood, plywood, particle board, and wood fiber board. A pattern is applied to the surface 11 and the end surface 12 of each of the surface 11 and the end surface 12 of the base material through the following steps.
In addition, before the surface 11 and the end surface 12 are coated, a white ink receiving layer for fixing ink ejected from the ink jet coating unit 20 described later is formed as a pretreatment on the wooden substrate. .

As the base material used for the plate-shaped building material 10 as described above, other wood-based materials, for example, solid wood, or solid wood, laminated wood, plywood, particle board, wood fiber board and the like, and a protruding board or A melamine resin or the like may be attached.
The base material may be a resin material such as a thermosetting resin material or a thermoplastic resin material. Further, bricks, tiles, ceramics, or cement-based ceramic materials containing cement as a main component and containing reinforcing fibers and inorganic fillers may be used as the base material.
The plate-like building material 10 as described above is used as an interior building material or an exterior building material of a building, and includes a door, a floor, a staircase, a fence, a pillar, a handrail, a shelf, a kitchen panel, a ceiling, various furniture cabinets and top plates, Used for inner wall, outer wall, roof, fence, etc.

In the present embodiment, as shown in the figure, the pattern painted on the plate-shaped building material 10 by the inkjet coating unit 20 described later is a wood grain tone, but is not limited to this, and the tile tone, block tone, single color, and the like. Various patterns may be used.
Moreover, in this embodiment, although the pattern is formed only by the surface by the inkjet coating unit 20 on the surface 11 and the end surface 12 of the plate-shaped building material 10, you may make it form a pattern also in the back surface.

Next, an example of an apparatus for coating the plate-shaped building material 10 will be described.
As shown in FIG. 2, the plate-shaped building material coating apparatus A shown in FIG. 2 is roughly configured by an inkjet coating unit 20 for coating each part of the plate-shaped building material 10, a control unit 30 for controlling each part of the apparatus, and a suction unit. Means 40 and plate-like building material conveying means 50 for conveying the placed plate-like building material 10 are provided.

The plate-shaped building material conveying means 50 constitutes a moving means for relatively moving the ink discharge ports 21d, 22d, 23d of the respective ink jet coating apparatuses 21, 22, 23 and the plate-shaped building material 10 to be described later, as shown in each drawing. The base 51 and the conveyor belt 52 are provided, and are controlled in conjunction with the ink ejection operations by the inkjet coating apparatuses 21, 22, and 23, which will be described later. 3 (a) and FIG. 4 (a).
In the present embodiment, the plate-shaped building material 10 is transported by the transport belt 52 to the respective ink-jet coating apparatuses 21, 22, and 23, which are fixed, respectively. Each ink discharge port 21d, 22d, 23d and the plate-shaped building material 10 are configured to move relative to each other, but each ink discharge of each of the ink jet coating apparatuses 21, 22, 23 is applied to the plate-shaped building material 10 in a fixed state. The outlets 21d, 22d, and 23d may be moved.

The inkjet coating unit 20 is for coating each part of the plate-shaped building material 10 in each step described later, and an inkjet coating device 21 for coating the surface center part for coating the surface center part 11b of the plate-shaped building material 10; A surface edge coating inkjet coating device 22 for coating the surface edge 11a of the building material 10 and an end surface coating inkjet coating device 23 for coating the end surface 12 of the plate-shaped building material 10 are provided.
Each of these inkjet coating apparatuses 21, 22, and 23 is arranged in the above order from the upstream side in the conveyance direction of the plate-shaped building material 10 conveyed by the conveyance belt 52 of the base 51.

As shown in FIG. 3, the inkjet coating apparatus 21 for coating the center of the surface includes an apparatus main body 21a disposed adjacent to the base 51, and a nozzle head arm 21b connected to the apparatus main body 21a and supporting the nozzle head 21c. Have.
The nozzle head arm 21b is supported by the support body 21e disposed opposite to the apparatus main body 21a with the base 51 interposed therebetween, and the apparatus main body 21a.
The nozzle head 21c is a so-called line-type nozzle head formed in a long direction in a direction orthogonal to the conveying direction of the plate-shaped building material 10 (width direction of the plate-shaped building material 10, left-right direction on the paper surface). An infinite number of ink ejection openings 21d that eject color ink droplets toward the surface center portion 11b (vertically downward) are formed.
The surface center portion inkjet coating device 21 is for coating the surface center portion 11b of the plate-like building material 10, and only the inner side of the surface 11 of the plate-like building material 10 is coated, for example, by about 5 mm. The remaining part becomes the surface edge part 11a.
The nozzle head 21c of the inkjet coating apparatus 21 for coating the center of the surface may be a so-called serial type nozzle head that can be moved and scanned in the width direction of the plate-shaped building material 10 instead of the line type.

As shown in FIG. 4, the end face coating ink jet coating apparatus 23 includes two end face coating ink jet coating apparatuses 23 for coating the end face 12. Yes.
Each of the end face coating inkjet coating apparatuses 23 includes an apparatus main body 23a disposed adjacent to the base 51, and a nozzle head arm 23b connected to the apparatus main body 23a and supporting the nozzle head 23c.
Each nozzle head 23c forms an infinite number of ink discharge ports 23d that discharge ink droplets of various colors toward the end surface 12 (horizontal direction) on the surface facing the end surface 12, and the ink discharged from the ink discharge ports 23d. The discharge width is controlled to be substantially the same as the plate thickness of the plate-shaped building material 10.
In this way, by controlling the ink ejection width, it is possible to prevent the ejected ink droplets from adhering to the surface side of the plate-shaped building material 10 when the end surface 12 is painted.

The inkjet coating apparatus 22 for surface edge coating constitutes inkjet coating means for coating the surface edge 11a of the plate-shaped building material 10 used in the plate-shaped building material coating method according to the present embodiment.
As shown in FIG. 1, the surface edge portion inkjet coating apparatus 22 includes an apparatus main body 22a disposed adjacent to a base 51, and a nozzle head arm 22b connected to the apparatus main body 22a and supporting a nozzle head 22c. have.
The nozzle head 22c has innumerable ink discharge ports 22d on the back surface thereof for discharging ink droplets of various colors toward the surface edge portion 11a (vertically below).
The inkjet coating device 22 for surface edge coating is for coating the surface edge 11a of the plate-like building material 10, and is applied from the peripheral edge left unpainted by the above-described inkjet coating device 21 for surface center coating. The remaining margin, that is, the surface edge portion 11a other than the surface center portion 11b is painted.
In addition, in the example of a figure, the state which coats the surface edge part 11a of the one side 13 of the plate-shaped building material 10 is shown, and the coating of the surface edge 11a of the other sides 14, 15, 16 has not been made yet. Indicates the state.

A suction nozzle 42 constituting a suction means 40 is disposed below the nozzle head arm 22b of the inkjet coating apparatus 22 for surface edge coating.
In the present embodiment, the suction means 40 is disposed in the vicinity of the end surface 12 and has a suction nozzle 42 having a suction port 41 that opens toward the end surface 12, and a suction hose 43 that connects the suction nozzle 42 and the suction blower 44 to each other. have.
The suction port 41 of the suction nozzle 42 is arranged such that its upper end 41a is below the end surface upper end 12a of the plate-shaped building material 10 placed on the transport belt 52 and above the end surface lower end 12b.
The suction nozzle 42 is disposed so as to be inclined downward toward the end surface 12, and the suction port 41 discharges a horizontal width (horizontal) of the ink droplets discharged from the nozzle head 22 c of the surface edge coating inkjet coating apparatus 22. It is made into the expansion shape toward the end surface 12 so that it may become larger than the width of a direction.

The control unit 30 includes a CPU 31 that constitutes a control means for controlling the above-described units, an operation means 32 for performing various operations, a storage means 33 for storing a control program, pattern data of a pattern to be painted, and the like.
In each figure, reference numeral 34 denotes a signal line that connects each unit and the control unit 30.

The ink jet nozzle driving method for discharging ink droplets from the ink discharge ports 21d, 22d, and 23d of each of the ink jet coating apparatuses 21, 22, and 23 is not particularly limited, and a known one can be selected as appropriate. Yes, any one of a drop-on-demand piezo method, a drop-on-demand valve method, a continuous charging deflection method, and the like can be applied.
Further, the ink to be ejected is, for example, a solution in which a pigment constituting a basic color is mixed with a resin, a solvent, a curing agent, an additive, and the like, and ink reception formed on the nozzle driving method and the plate-shaped building material 10 described above. A known industrial inkjet ink can be applied depending on the layer or the like. For example, a fast-drying ink that uses methyl ethyl ketone, ethanol, acetone, or the like as a solvent, an oil-based oil-based ink, a UV curable ink that is cured by irradiation with ultraviolet rays, a water-based ink, or the like may have at least weather resistance and water resistance. preferable.
Furthermore, when the white ink-receiving layer is formed by pretreatment as in this embodiment, color inks such as black, yellow, magenta, and cyan are applied, but the colors of the ink-receiving layers are different. In the case of a substrate that does not need to form an ink receiving layer, an appropriate color ink can be selected according to the color of the ink receiving layer and the surface color of the substrate.

In the present embodiment, the suction means 40 is illustrated as having the suction blower 44. However, any suction blower may be used as long as it generates an air flow in a direction away from the end face 12. Instead of 44, a suction pump or a fan may be used.
Furthermore, a filter device may be disposed in the middle of the suction hose 43, or a filter or the like may be disposed in the suction port 41 of the suction nozzle 42.
Furthermore, the suction means 40 may be any device that generates an air flow in a direction away from the end surface 12 so as to guide ink droplets floating and dropping in the vicinity of the end surface as will be described later. A fan may be arranged in the vicinity.
The selection of the suction means 40 and the setting of the suction force (outputs of the blower, pump, etc.) are the size and shape of the nozzle head 22c of the inkjet coating device 22 for surface edge coating and the ink ejected from the ink ejection port 22d. It can be appropriately selected and set according to the size and discharge pressure of the droplet, the size and shape of the suction port 41 and the like.

  Next, the process of coating the plate-shaped building material 10 using the plate-shaped building material coating apparatus A configured as described above will be described.

<Surface center coating process>
As shown in FIG. 3, the plate-shaped building material conveying means 50 is operated so that the plate-shaped building material 10 placed on the conveying belt 52 is directed below the nozzle head 21 c of the inkjet coating apparatus 21 for coating the surface center portion. Transport.
When it is detected that the transported plate-shaped building material 10 has arrived at a predetermined position, ink droplets are ejected from the ink discharge ports 21d based on the pattern data stored in the storage means 33, and the transported plate-shaped building material 10 On the other hand, the surface center portion 11b is coated by the nozzle head 21c scanning the surface center portion 11b.
At this time, the predetermined position may be detected by an optical sensor or the like.
The plate-shaped building material 10 coated with the surface center portion 11 b is conveyed by the conveyance belt 52 toward the next process.
In this surface center portion painting step, as described above, only the inner side, for example, about 5 mm from the periphery of the surface 11 of the plate-like building material 10 is painted, so that the ink droplets ejected from the ink ejection port 21d are in the outer surface area. It will not scatter or float.
Note that the unpainted margin from the periphery depends on the distance between the ink discharge port 21d and the surface 11 of the plate-shaped building material 10 or the like, and the ink droplets discharged from the ink discharge port 21d are scattered or floated on the outer surface. You may set so that it may not fall.

<Surface edge painting process>
As described above, the plate-shaped building material 10 coated on the surface center portion 11b reaches the surface edge portion painting step.
This surface edge coating step constitutes the plate-shaped building material coating method according to the present embodiment, and as shown in FIG. 1, the plate-shaped building material 10 placed on the conveyor belt 52 is an inkjet for surface edge coating. The surface edge 11a is painted by the coating device 22.
When it is detected that the transported plate-shaped building material 10 has arrived at a predetermined position, ink droplets are ejected from the ink discharge ports 22d based on the pattern data stored in the storage means 33, and the transported plate-shaped building material 10 On the other hand, the nozzle head 22c scans the surface edge 11a along the one side 13 to coat the surface edge 11a of the one side 13 of the plate-shaped building material 10.
Since the coating of the surface edge portion 11a is performed by inkjet coating based on the same pattern data as when the surface center portion 11b is coated, the ink droplet discharge operation from each ink discharge port 22d of the nozzle head 22c is performed. By controlling, high accuracy can be achieved without impairing the continuity of the pattern with the surface center portion 11b painted in the surface center portion coating step and without overcoating.
Further, while the ink droplets are being ejected from the ink ejection port 22d, the suction means 40 is operated to generate an air flow in a direction away from the end face 12 of the one side 13.

After coating the surface edge 11a of the one side 13, the plate-shaped building material 10 is rotated 90 ° by a rotating means or the like, and the surface edges 11a of the other sides 15, 14, 16 are sequentially coated. Similarly to the above, the suction means 40 is operated and airflow is generated in the direction away from the end face 12.
If the surface edge 11a of one side 13 is painted along the longitudinal direction (up and down direction on the paper surface), the surface edge 11a at the corner with the other side 15 is already painted. When the side 15 is painted, it may be controlled so as not to be discharged to the surface edge 11a of the already painted portion. The same applies to the other sides 14 and 16. Since such control is also performed by inkjet coating, it can be performed with high accuracy.
Moreover, the surface coating part 22 is disposed on both sides of the base 51, and the surface edge 11a of the opposing sides 13 and 14 is coated, and then rotated to the other opposing side. The surface edges 11a of the sides 15 and 16 may be painted.
In this case, the suction nozzles 42 may be disposed below the respective nozzle head arms 22b of the surface edge coating inkjet coating apparatus 22 disposed on both sides.

As described above, in the state where the suction unit 40 is operated to generate an air flow in the direction away from the end surface 12, the ink droplets are ejected from the ink ejection port 22d toward the surface edge 11a, and the surface edge 11a is applied, ink droplets that are ejected to the outer surface of the surface, scatter, or float down are guided in a direction away from the end surface 12, or the suction port of the suction nozzle 42 41 is inhaled.
Thereby, it is possible to prevent the ink droplets ejected toward the surface edge portion 11a of each side from adhering to the end surface 12 of each side. As a result, after coating the surface center portion 11b and the surface edge portion 11a of the plate-shaped building material 10, in the next step, when the end surface 12 is painted, the end surface 12 becomes double-coated and darker than the surface 11 It can be reduced that the pattern quality of the end face 12 is deteriorated. Therefore, the plate-shaped building material 10 with high designability can be provided.

In addition, since the suction nozzle 42 is disposed so that the upper end 41a of the suction port 41 of the suction means 40 is below the upper end 12a of the end face of the plate-like building material 10 placed on the conveyor belt 52, the plate-like building material 10 Interference of airflow generated by suction can be prevented with respect to ink droplets that are ejected toward the surface edge portion 11a and float and fall on the inner surface area. Thereby, it can reduce that the quality of the pattern etc. which form in the surface edge part 11a falls.
Further, since the suction nozzle 42 is disposed so as to be inclined downward toward the end surface 12, the air flow of the suction air formed by the suction of the suction means 40 is obliquely upward. Thereby, compared with what arrange | positions the suction nozzle 42 horizontally, or inclines upward, the ink droplet discharged toward the surface edge part 11a of the plate-shaped building material 10 and suspended and falling in the surface inner area | region Can be effectively prevented.
In addition, this makes it possible to more efficiently separate the ink droplets that float and fall from the surface outer area of the plate-shaped building material 10 toward the vertically lower side by its own weight from the end surface 12.

<End face painting process>
The plate-shaped building material 10 coated on the surface 11 as described above reaches the end surface coating step, and as shown in FIG. 4, the plate-shaped building material 10 placed on the conveyor belt 52 is ink-jet painted for end surface coating. The end face 12 is painted by the device 23.
When it is detected that the transported plate-shaped building material 10 has arrived at a predetermined position, ink droplets are ejected from the ink discharge ports 23d based on the pattern data stored in the storage means 33, and the transported plate-shaped building material 10 On the other hand, the nozzle head 23 c scans along the end surface 12, thereby coating the end surfaces 12 of the opposing side edges 13 and 14 of the plate-shaped building material 10.
In the present embodiment, as described above, the end faces 12 of the side edges 13 and 14 of the plate-shaped building material 10 are simultaneously coated by the end face coating ink jet coating apparatus 23 arranged on both sides of the base 51. Then, the plate-shaped building material 10 is rotated by 90 ° by a rotating means or the like, and the end faces 12 of the other opposing side edges 15 and 16 are coated.

In the present embodiment, the coating of the end surface 12 is configured to coat the opposing end surfaces 12 and 12 at the same time as described above. The end face 12 on each side may be sequentially coated by the end face coating inkjet coating apparatus 23.
Further, the order of the above steps is not limited to the order described above, and after the end surface 12 is painted, the surface center portion 11b and the surface edge portion 11a may be painted in this order or in the reverse order.
Furthermore, after passing through the above three steps, a protective layer is formed by further attaching a transparent protective sheet or film so as not to disturb the applied pattern, or a transparent resin paint (for example, A protective coating film may be formed by painting urethane, epoxy, or the like.
Furthermore, in this embodiment, although the coating process of the surface center part 11b, the surface edge part 11a, and the end surface 12 of the plate-shaped building material 10 is performed by the plate-shaped building material coating apparatus A is illustrated, The building material coating apparatus A may be configured to execute at least the surface edge coating process. That is, you may make it perform a surface center part coating process and an end surface coating process with another apparatus.

Next, another embodiment according to the present invention will be described with reference to the drawings.
FIG. 5 is an explanatory diagram for explaining a plate-shaped building material coating method according to the second embodiment, in which (a) is a schematic plan view and (b) is a schematic longitudinal sectional view.
The difference from the first embodiment is mainly the configuration of the ink jet coating apparatus and the configuration of the suction means. The same components are denoted by the same reference numerals and the description thereof is omitted.
In FIG. 5B, a front and rear end face suction device 45, which will be described later, is not shown.

In the present embodiment, the plate-shaped building material coating apparatus B includes a surface-part coating ink-jet coating apparatus 24 instead of the surface center-part coating ink-jet coating apparatus 21 and the surface edge part coating ink-jet coating apparatus 22 described above. .
That is, the inkjet coating apparatus 24 for surface portion coating has an apparatus main body 24a disposed adjacent to the base 51, and a nozzle head arm 24b connected to the apparatus main body 24a and supporting the nozzle head 24c.
The nozzle head arm 24b is supported by the apparatus main body 24a and a support portion 24e disposed opposite to the apparatus main body 24a with the base 51 interposed therebetween, and is arranged in the longitudinal direction of the plate-shaped building material 10 (the paper surface in FIG. 5A). It is possible to move in the vertical direction).

The nozzle head 24c is a so-called line-type nozzle head formed long in the width direction of the plate-shaped building material 10 (left and right direction in FIG. 5 (a)). An infinite number of ink discharge ports 24d that discharge vertically downward are formed over the entire width direction of the surface 11 of the plate-shaped building material 10.
In this surface coating ink-jet coating apparatus 24, the nozzle head 24 c moves and scans the surface 11 with respect to the plate-like building material 10 temporarily fixed on the transport belt 52, so that the entire surface 11 is covered. Paint.
The nozzle head 24c of the surface coating ink jet coating apparatus 24 may be a so-called serial type nozzle head that can be moved and scanned in the width direction of the plate-shaped building material 10 instead of the line type.
Further, an end face coating ink jet coating apparatus 23 similar to that in the first embodiment is disposed on the downstream side in the transport direction of the surface portion coating ink jet coating apparatus 24.

Further, the suction means 40A provided in the plate-shaped building material coating apparatus B has suction nozzles 42 disposed in the vicinity of the end surfaces 12 of the opposite side sides 13 and 14, respectively, and these suction nozzles 42 are connected to the nozzle head 24c. In synchronization with the ejection operation of the ink ejection port 24d, the nozzle head arm 24b moves in the same direction as the nozzle head arm 24b, and suction is performed when ink droplets are ejected.
That is, of the ink droplets ejected from the ink ejection port 24d toward the surface 11 of the plate-shaped building material 10, the ink droplets ejected toward the surface edge portion 11a of the opposite sides 13 and 14 float and fall to the outer surface area. In this case, these suction nozzles 42 guide or suck the ink droplets away from the respective end faces 12.

Furthermore, the suction means 40 </ b> A has front and rear end face suction devices 45 that are respectively positioned on the upstream side and the downstream side in the transport direction of the plate-shaped building material 10 that is temporarily fixed on the transport belt 52.
These front and rear end face suction devices 45 are respectively supported by a suction nozzle support arm 47 supported by support parts 46 arranged to face each other across the base 51, and supported by these suction nozzle support arms 47, and open toward each end face 12. And a suction nozzle 48 having a suction port 49.
The suction ports 49 of the suction nozzles 48 are opened toward the respective end surfaces 12 over the entire width of the plate-shaped building material 10.
Each suction nozzle 48 can be moved up and down in the vertical direction by a suction nozzle support arm 47. When the plate-shaped building material 10 is transported by the transport belt 52, the suction nozzle 48 is lifted so as to be transported. When it is detected that the building material 10 has arrived at a predetermined position, it is lowered. Further, when ink droplets are ejected from the ink ejection port 24d of the nozzle head 24c, an air flow is generated in a direction away from the respective end faces 12 of the opposing side edges 15 and 16 by suction by the operation of the suction blower 44. Yes.
The suction nozzles 42, 42, 48, 48 of the suction means 40 </ b> A are all connected to the suction blower 44 through a suction hose 43.
Further, the upper ends of the respective suction ports 49, 49 are lowered from the end surface upper end 12a of the plate-shaped building material 10 placed on the conveyor belt 52 and from the end surface lower end 12b when lowered, like the suction port 41. The suction nozzles 48 are arranged so as to be on the upper side, and are inclined downward toward the end surface 12.

  Next, the process of coating the plate-shaped building material 10 using the plate-shaped building material coating apparatus B configured as described above will be described.

<Surface coating process>
The plate-shaped building material conveying means 50 is operated to convey the plate-shaped building material 10 placed on the conveying belt 52 toward the lower side of the nozzle head 24c of the surface coating inkjet coating apparatus 24.
When transported, as described above, the suction nozzle 48 of the front and rear end face suction device 45 is raised, and when the plate-shaped building material 10 arrives at a predetermined position and stops, it is lowered.
In addition, when the transported plate-shaped building material 10 arrives at a predetermined position and stops, the nozzle head 24c is moved and scanned, and moved on the surface 11 of the plate-shaped building material 10 from the downstream side in the transport direction toward the upstream side. The entire surface 11 is painted. That is, in the present embodiment, the surface center portion 11b and the surface edge portion 11a are simultaneously coated in the same process.
When ink droplets are being ejected from the ink ejection port 24d of the nozzle head 24c, as described above, the suction blower 44 is operated, and suction is performed by the suction ports 41, 41, 49, 49, so that each side Air currents are generated in directions away from the end faces 12 of 13, 14, 15, and 16, respectively.
Note that the ejection control of the ink droplets from the ink ejection port 24d of the nozzle head 24c is performed based on the pattern data stored in the storage unit 33, as in the first embodiment.
The plate-shaped building material 10 coated on the entire surface 11 as described above is transported toward the end surface coating process by the transport belt 52.
Since the end face coating process is the same as that in the first embodiment, description thereof is omitted.

As described above, in the present embodiment, when the entire surface 11 of the plate-shaped building material 10 is painted by the surface coating ink-jet coating device 24, each side 13, 14, 15, 16 of the plate-shaped building material 10. Since the suction means 40A for generating an air flow in the direction away from each end face 12 is provided, ink droplets ejected toward the surface 11 of the plate-shaped building material 10 are applied to the end face 12 as in the first embodiment. It can prevent adhesion.
In addition, as the plate-shaped building material 10 coated in each of the above-described embodiments, those having a smooth surface 11 are illustrated, but it is also possible to paint even those having an uneven shape formed on the surface 11.
Moreover, the coating to the thing which has the inclined surface and convex curved surface which were formed in the periphery of the plate-shaped building material 10 by chamfering is also possible.

It is explanatory drawing for demonstrating one Embodiment of the plate-shaped building material coating method which concerns on this invention, (a) is a schematic plan view, (b) is a schematic longitudinal cross-sectional view. It is a block diagram which shows an example of the plate-shaped building material coating apparatus which performs the plate-shaped building material coating method which concerns on the same embodiment. It is explanatory drawing for demonstrating the process of coating the surface center part of a plate-shaped building material with the plate-shaped building material coating apparatus, (a) is a schematic plan view, (b) is a schematic longitudinal cross-sectional view. It is explanatory drawing for demonstrating the process of coating the end surface of a plate-shaped building material with the plate-shaped building material coating apparatus, (a) is a schematic plan view, (b) is a schematic longitudinal cross-sectional view. It is explanatory drawing for demonstrating other embodiment of the plate-shaped building material coating method which concerns on this invention, and is a figure corresponding to FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Plate-shaped building material 11 Surface 11a Surface edge part 12 End surface 13, 14, 15, 16 Side 22 Inkjet coating apparatus for surface edge coating (inkjet coating means)
22d Ink discharge port 24 Inkjet coating device for surface coating (inkjet coating means)
24d Ink ejection port 40, 40A Suction means 41, 49 Suction port 42, 48 Suction nozzle

Claims (2)

It is a plate-shaped building material coating method in which ink droplets are discharged from an ink discharge port of an inkjet coating means, and a surface edge portion of a plate-shaped building material that is substantially rectangular in plan view is painted,
The suction means arranged near the end face of the side edge of the plate-shaped building material is operated to generate an air flow that is in a direction away from the end face of the side edge and that is directed horizontally or obliquely upward near the end face of the side edge. In this state, the ink discharge port and the plate-shaped building material are moved relative to each other along the side, and ink droplets are discharged from the ink discharge port toward the surface edge of the side. A plate-shaped building material painting method characterized by painting an edge. In claim 1,
The plate-shaped building material coating method, wherein the suction means includes a suction nozzle having a suction port that opens toward an end surface of the side.

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