JP2011094298A - Method for manufacturing wood plate-like building material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a wood plate-like building material, which can reduce a sense of discomfort of a surface of the wood plate-like building material having at least either of a groove portion and a chamfered portion formed on the surface, and which can improve designability. <P>SOLUTION: Wood 1, to which heating treatment is applied by high-pressure and high-temperature vapor, is sliced under a wet state so as to manufacture a sliced veneer 13. After the sliced veneer is manufactured is stuck on a wood base material 12 so as to manufacture a laminated body 11, at least either of the groove portion 14 and the chamfered portion 15 is formed on the surface 11a of the laminated body; and subsequently, coloring treatment is applied onto the surface by using such paint as not to hinder a color tone of the surface of the laminated body. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a wooden plate-shaped building material in which sliced single plates are laminated on the surface of a wooden substrate.

Plate-like building materials used for building interior materials are made of wood-based materials such as plywood, particleboard, medium-density fiberboard (MDF), and other natural materials on the surface. A wooden board-like building material having a laminated structure in which a surface decorative board (sliced single board) produced by slicing a name tree is used is used.
From the viewpoint of design and the like, the surface decorative material and the wooden base material were laminated and integrated on the surface of the wooden plate-like building material as described above, and then grooves (decorative grooves) and chamfered portions were formed by cutting. There is something.

  The shape of the groove is generally a V-shaped cross section. In addition, although there are various groove shapes, for example, in Patent Document 1 below, a groove in which the inner wall surface of the groove portion is convexly curved toward the center portion of the groove portion, or a refraction point is provided on the inner wall surface of the groove portion (multistage ( A multi-faceted wooden flooring with a groove that has been expanded has been proposed.

Japanese Patent No. 3741960 (see FIGS. 2 and 3)

By the way, the surface of the woody plate-shaped building material as described above is easily stained and scratched as it is, and also for color resistance treatment by painting for the purpose of suppressing lightness variation and imparting light resistance. Is given.
In this way, when the coloring process is performed, depending on the shape of the groove or chamfered portion, the paint is likely to accumulate and becomes darker than other parts (particularly the groove), or the paint is difficult to adhere. In some cases, insufficient coloring or the like occurs in comparison with other parts (particularly chamfered portions), and color unevenness or the like may occur in the surface edge portion. For example, in a groove having a substantially V-shaped cross section with a small opening angle and a tight inclination, coloring may be insufficient. On the other hand, when the opening angle is large and the inclination is loose, the color difference between the surface and the groove is different. As a result, the boundary between the surface and the groove edge (surface edge) is not linear, and color unevenness may be noticeable.

  The present invention has been made in view of the above circumstances, and can reduce the discomfort on the surface of the wooden plate-shaped building material in which at least one of the groove portion and the chamfered portion is formed on the surface, and improve the design. It aims at providing the manufacturing method of the obtained wooden board-shaped building material.

  In order to achieve the above object, a method for producing a wooden plate-like building material according to the present invention is a method of producing a slice veneer by slicing wood that has been heat-treated with high-pressure and high-temperature steam in a wet state. After a single plate is attached to a wooden substrate to produce a laminate, at least one of a groove and a chamfer is formed on the surface of the laminate, and then the color tone of the surface of the laminate The surface is colored with a paint that does not hinder the surface.

In the present invention configured as described above, the wood is thermally colored by heat treatment with high-pressure and high-temperature steam, and the light resistance is improved. Since the slice veneer obtained by slicing this wood is attached to a wooden base material, the surface of the laminate is subjected to surface processing of at least one of the groove and the chamfered portion, The surface of the laminate and the cut surface of the slice single plate constituting the surface processed surface (in the case of a groove portion, the inner wall surface of the groove portion and the chamfered surface in the case of a chamfered portion) are thermally colored and light-resistant. Sex has been granted. Therefore, it is not necessary to apply a high-concentration paint thickly to impart light resistance or the like, and a thin colored coating close to the color tone of the fabric can be applied over the entire surface including the above-mentioned surface processed surface as a coloring treatment. The wood texture of the sliced veneer on the surface of the laminate can be prevented.
Moreover, by setting it as such finish coating, the cutting surface of the slice single plate which comprises the said surface processing surface is combined with the heat coloring, and the said surface processing surface and other surfaces A difference in color tone (shading) hardly occurs or is not conspicuous, and the design can be improved. Accordingly, at least one of the groove portion and the chamfered portion to be processed on the surface of the laminated body can have various desired shapes, and a three-dimensional wood panel building material with high design can be manufactured.

Furthermore, according to such a configuration, even when wear or the like occurs on the surface and the coating film disappears or the slice veneer itself wears, the entire slice veneer is thermally colored. As long as the entire slice veneer of the part does not disappear, the appearance is not deteriorated before and after the disappearance of the coating film, before and after the wear, and between the part and other parts.
Furthermore, by appropriately setting processing conditions such as processing temperature and processing time with high-pressure and high-temperature steam, the degree of coloration of the wood can be controlled, and various wooden plate-like building materials can be provided.

  Thermal coloring by heat treatment of the high-pressure high-temperature steam as described above, light resistance imparting, by selectively thermally decomposing and changing the quality of hemicellulose among cellulose, hemicellulose and lignin, which are the main components of the wood composition component, A highly colored light-polymerizable colored product is uniformly generated throughout the wood fiber cell tissue, so that the wood grain is emphasized due to the density of the cell tissue and is thermally colored, and light resistance is imparted. At this time, the surface of the treated wood may be precipitated as a by-product of a low-light-resistant oxidation colored product that has been modified by a low molecular weight resin similar to phenol contained in lignin. In such a case, You may make it remove a surface deposit.

Moreover, homogenization of wood is promoted by applying heat treatment with high-pressure and high-temperature steam to wood. The homogenization of the wood by the heat treatment of such high-pressure and high-temperature steam is performed by decreasing due to the alteration due to the thermal decomposition of the hemicellulose. In particular, hemicellulose has a mediating role in immobilizing cellulose with lignin, and this alteration and reduction of hemicellulose has a greater effect on the dense part of the wood fiber cell tissue and promotes homogenization. .
The homogenized wood is less affected by the difference in density between the high-density part and the low-density part of the wood structure. In comparison, reverse cracks that occur during slicing are less likely to occur, and a relatively thick slice veneer can be produced efficiently. Thus, if the sliced veneer is formed to be thick, the exposure of the wooden base material on the surface processed surface can be effectively reduced or eliminated, and the appearance of the surface of the wooden plate-like building material can be improved. It can be improved further.

In the present invention, the coloring treatment may be performed so that the color difference ΔE between the surface of the laminate before the coloring treatment and the surface of the laminate after the coloring treatment is 4.0 or less.
With such a configuration, it is possible to more effectively alleviate the difference in color tone between the above-mentioned surface processed surface and the other surface without impairing the wood texture of the laminate surface, and to improve the design. Can do.

Further, in the present invention, the groove portion and the chamfered portion of the groove portion and the chamfered portion so that the angle formed between the surface edge side surface and the surface of the laminate is larger than the angle formed between the lower end portion side surface and the surface of the laminate. At least one of these may be formed.
With such a configuration, the degree of exposure of the slice veneer exposed on the surface processed surface can be increased more efficiently than the degree of exposure of the wooden substrate, and the design can be improved.
In addition, since the degree of inclination of the lower end side surface with respect to the laminate surface is larger than the degree of inclination of the surface edge side surface with respect to the laminate surface, it is efficient at a site where at least one of the groove portion and the chamfered portion is formed. A three-dimensional feeling can be expressed. That is, it is possible to give a deep impression on the lower end side, and particularly when a groove is formed, it has an appearance close to that of a solid laminated material in which a solid material is abutted in the groove, thereby improving the design. it can.

In the present invention, after forming at least one of the groove and the chamfered portion, a dark color line is applied to the lower end portion along the longitudinal direction of the formed groove and chamfered portion. May be.
With such a configuration, it is possible to give a deep impression at the lower end portion, and particularly when a groove portion is formed, it has an appearance close to that of a solid laminated material in which a solid material is abutted at the groove portion, and is more designed. Can be improved.

In the present invention, at least one of the groove and the chamfered portion is set so that the width from the surface edge portion to the lower end portion in a plan view is 1.0 mm or more and 4.0 mm or less. You may make it form.
With such a configuration, it is possible to more effectively reduce the uncomfortable feeling of the portion where at least one of the groove and the chamfered portion is formed, and at least one of the groove and the chamfered portion is formed. A three-dimensional feeling can be given to a part, and a woody plate-shaped building material with higher design can be produced.

  According to the method for manufacturing a wooden plate-shaped building material according to the present invention, the above-described configuration allows the surface of the wooden plate-shaped building material in which at least one of the groove and the chamfered portion is formed on the surface to be uncomfortable. Can be reduced, and a woody plate-shaped building material with high designability can be manufactured.

It is a schematic flowchart for demonstrating one Embodiment of the manufacturing method of the wooden plate-shaped building material which concerns on this invention. (A) is a schematic side view schematically showing an example of a system configuration of a heat treatment apparatus used in the manufacturing method, and (b) schematically shows a state in which woods to be heat-treated by the heat treatment apparatus are stacked. (C) is a schematic front view which shows typically the state which accommodated the laminated | stacked wood in the heat processing apparatus. (A)-(c) is a conceptual explanatory drawing for demonstrating all the manufacturing methods. (A), (b) is notional explanatory drawing for demonstrating the manufacturing method, (c) is a schematic plan view which shows typically the wooden board-shaped building material manufactured by the manufacturing method is there. (A)-(d) is a conceptual explanatory drawing for demonstrating one modification of the wooden board-shaped building material manufactured in the same manufacturing method.

Embodiments of the present invention will be described below with reference to the drawings.
In this embodiment, as shown in FIG.4 (c), the flooring 10 is illustrated as a wooden board building material manufactured with the manufacturing method of the wooden board building material which concerns on this embodiment.
The flooring 10 has a rectangular shape in plan view, and is, for example, a long plate-like body of about 1 scale (303 mm) × 6 scales (1818 mm).
As shown in FIG. 4 (b), the flooring 10 has a structure in which a wooden substrate 12 and a slice single plate 13 on the surface side are laminated and integrated.
As will be described later, this slice veneer 13 is produced by slicing wood that has been heat-treated with high-pressure and high-temperature steam in a wet state.

First, a schematic configuration of an example of a heat treatment apparatus used in the method for manufacturing a wooden plate-shaped building material according to the present embodiment will be described with reference to FIG.
A high-pressure and high-temperature steam kettle (hereinafter referred to as a steam kettle) 20 as a heat treatment apparatus is configured by closing the opening of a horizontally long cylindrical container body 21 with an open / close lid 22 as shown in FIG. The opening / closing lid 22 hermetically seals the container main body 21 by a fastening means 29 such as a ferrule joint, a clamp joint, or a bolt / nut mechanism, and is detachable or openable with respect to the container main body 21. . FIG. 2C shows a state in which the opening / closing lid 22 is removed.
The container main body 21 and the opening / closing lid 22 are made of metal having a low pressure resistance such as stainless steel from the viewpoint of preventing metal contamination of the flitch material 1 (see FIG. 2C) as wood to be heat-treated. It may be made of a material.
As shown in FIG. 2 (c), a plurality of roller members 21a rotatably supported on both sides of the container body 21 are provided in the container body 21 from the opening side toward the back side. It has been. The roller member 21a is provided with a placement plate 8 on which an object to be processed is placed, and the flitch material 1 can be easily taken in and out.

A steam supply pipe 23 that supplies high-pressure and high-temperature steam from the high-pressure and high-temperature steam supply source 3 into the steam kettle 20 and a pressurized water supply that supplies pressurized water from the pressurized water supply source 4 to the steam kettle 20 are provided below the container body 21. A pipe 24, a drain pipe 27 that discharges liquefied water vapor and the like from the steam kettle 20, and a drain pipe 28 are connected.
Further, a pressurized air pipe 25 that supplies pressurized air from the pressurized air supply source 5 into the steam kettle 20 and an exhaust that discharges steam or gas from the steam kettle 20 are disposed above the container body 21. A tube 26 is connected.

As the high pressure / high temperature steam supply source 3, a high pressure boiler or the like may be employed.
As the pressurized water supply source 4, a high-pressure water tank, a high-pressure pump, or the like may be employed.
An air compressor or the like may be employed as the pressurized air supply source 5.
The above-described pipes 23, 24, 25, 26, 27, and 28 are provided with opening / closing valves 23a, 24a, 25a, 26a, 27a, and 28a in the middle of the respective pipes.
Further, the drain pipe 27 is provided with a steam trap 27b, a filter, and the like at appropriate positions along the pipe line.
The specific configuration of the high-pressure and high-temperature steam kettle 20 is not limited to that shown in the drawings, and any configuration may be used as long as the wood can be heat-treated with the high-pressure and high-temperature steam.

Next, an example of the manufacturing method of the wood board building material which concerns on this embodiment is demonstrated based on FIGS.
<Wood placement process (step 100)>
First, as shown in FIG. 2 (b), a plurality of (12 in the example) flitch materials 1, 1... As a heat treatment target are arranged in the horizontal direction and the height direction (thickness direction). 2) are stacked on the mounting plate 8 with the crosspieces 6 interposed therebetween, and are placed in the steam pot 20 as shown in FIG. 2 (c).
In addition, when the pressurized water is supplied and submerged in the cooling step described later, appropriate lifting prevention means 7 is disposed so that each flitch material 1 disposed in the steam pot 20 does not float.

  In the illustrated example, the lifting prevention means 7 is a weight 7 corresponding to the flitch material 1 disposed in the steam kettle 20, but the lifting prevention means 7 may be made of a metal net that is appropriately weighted. You may make it comprise. Alternatively, the uppermost flitch material 1 (or the crosspiece member 6 disposed above it) and the mounting plate 8 are fixedly held by winding a metal wire rope or the like to lift the flitch material 1. Any device can be used as long as it can prevent the above.

The crosspiece member 6 may be made of a metal material similar to that of the steam pot 20 or made of a wood material. Such a crosspiece member 6 may not be provided depending on the size of the wood as a heat treatment target (in this example, the flitch material 1). , The high-pressure and high-temperature steam can permeate into the wood relatively quickly, and an efficient heat treatment can be performed.
In the present embodiment, the bar member 6 is arranged so that the flitch material 1 disposed in the steam cooker 20 does not come into contact with the inner wall (the mounting plate 8 in the illustrated example) of the steam cooker 20. And between the mounting plate 8. Further, when the lifting prevention means 7 is a weight 7 as shown in the figure, a crosspiece member 6 is interposed between the weight 7 and the uppermost flitch material 1 so as not to contact with each other. You may make it make it.

The wood as the heat treatment target (in this example, the flitch material 1) contains a considerable amount of moisture such as raw material, boiled or steamed wood, etc. that has not been subjected to drying treatment. It is preferable from the viewpoint of permeability to water, and it may be a raw material having a moisture content of about 30% (dry base) or more.
In addition, examples of the tree species include beech, oak, cedar, merkaba, beach, oak, teak, hard maple, cherry, walnut, white ash, mahogany, and other various tree species. Diffuse material such as beech wood is a tree species that is more difficult to emphasize the grain than ring material such as oak wood. In this way, it is colored by heat and can emphasize the grain.

  In the present embodiment, the wood as the heat treatment target is the flitch material 1 processed into a prismatic shape, and in the present embodiment, at least one of length (thickness), width (width), and length. One of them is 180 mm or less, and in the illustrated example, the thickness is about half of the width and a long one is shown. In this way, in the heat treatment step and the cooling step, which will be described later, by making wood at least one of vertical (thickness), horizontal (width), and length is 180 mm or less, The temperature increase difference (temperature decrease difference) between the surface of the wood and the core can be reduced efficiently, and the surface cracking and strength deterioration of the wood can be reduced efficiently, and efficient heat treatment and cooling are executed. Can do.

<Heat treatment process (step 101)>
As described above, after the flitch material 1 is disposed in the steam kettle 20, the steam kettle 20 is sealed by the open / close lid 22, and the steam supply valve 23a, the exhaust valve 26a, and the drain valve 27a among the above-described valves are provided. The other valves 24a, 25a, and 28a are closed, high-pressure high-temperature steam is supplied into the steam kettle 20, and the air in the steam kettle 20 is replaced with steam.
Next, the exhaust valve 26a is closed from the above state, and high-pressure and high-temperature steam is supplied, and the temperature in the steam kettle 20 is gradually increased to a predetermined processing temperature, for example, at about 1 ° C./min to 3 ° C./min. Let
The treatment temperature (atmosphere temperature in the steam kettle 20) as the heat treatment conditions is 105 ° C. or more and 160 ° C. or less (in the pressure range, 0.2 kgf / cm ² G (about 0.02 MPaG) or more and 5.3 kgf / cm ² G (about 0.52 MPaG) or less, preferably about 150 ° C. (3.9 kgf / cm ² G (about 0.37 MPaG)) or less.
The processing temperature may be measured and controlled by, for example, an appropriate temperature sensor installed on the inner wall of the steam kettle 20, or the pressure in the steam kettle 20 may be measured by a pressure gauge or the like. You may make it control.

If the treatment temperature is less than the above lower limit temperature, the hemicellulose of the wood composition component is not sufficiently pyrolyzed, and there is a tendency that the homogenization of the wood and thermal coloring and light resistance imparting to the wood are not sufficiently achieved. If the upper limit temperature is exceeded, depending on the size of the wood as the heat treatment target and the treatment time, the thermal decomposition of hemicellulose tends to be excessive and the wood fiber cell tissue tends to deteriorate, and the strength of the wood tends to decrease. If the size of the wood is reduced and the treatment time is shortened, the strength of the wood will not deteriorate so much even at a treatment temperature exceeding 160 ° C. and below 190 ° C. Coloring and light resistance can be imparted to some extent.
This treatment temperature greatly contributes to the degree of coloration of the wood as a heat treatment target (in this example, the flitch material 1), and by appropriately setting this treatment temperature within the above range, the degree of coloration of the wood can be easily achieved. Can be controlled.

  In addition, the heat treatment with the high-pressure and high-temperature steam in the steam pot 20 includes the surface temperature (substantially the atmosphere temperature in the pot) of the wood (the flitch material 1 in this example) as the heat treatment target, and the wood core. You may make it set the process time as heat processing conditions so that the temperature difference with the temperature of this may be within 10 degreeC. Preferably, a holding time of about 10 minutes or more may be provided after the temperature difference is within 10 ° C. More preferably, the temperature of the wood core is maintained for about 10 minutes or more until the temperature reaches the same level (105 ° C. or higher, 160 ° C. or lower, preferably 150 ° C. or lower) as the above processing temperature. You may make it provide time.

By setting it as such processing time, the color nonuniformity inside a timber can be reduced, the homogenization of a timber can be improved more, and a yield and productivity can be improved.
The processing time after reaching the predetermined processing temperature depends on the wood species, size, temperature in the pot, etc., but in the case of beech, oak, etc. It is good also as about 1 hour-4 hours.
In addition, it may replace with the aspect which sets the said processing temperature, and you may make it control the coloring degree of wood by setting this processing time suitably.

<Wood cooling, pressure reduction process in the pot (step 102)>
After performing the heat treatment process as described above, the wood is cooled and the pressure in the steam kettle 20 is reduced.
It is preferable from the viewpoint of preventing dry cracking of the wood, etc., that the pressure reduction processing of the steam pot 20 is performed after the wood core is cooled to a predetermined temperature or less.
This predetermined temperature may be about 100 ° C. or lower, preferably about 90 ° C. or lower.
In the present embodiment, in order to improve the efficiency of the cooling process and prevent dry cracking of the wood more efficiently, the wood is submerged in a state where the inside of the steam kettle 20 is maintained at a predetermined high pressure state before the pressure reduction process is executed. And let it cool.

  That is, in this embodiment, after the heat treatment step is performed, the water vapor supply valve 23a is closed and the pressurized water supply valve 24a and the pressurized air supply valve 25a are opened so that the pressure in the steam pot 20 does not decrease. While maintaining the high pressure state, the flitch material 1 in the steam pot 20 is submerged and cooled. Preferably, the cooling may be performed while maintaining a high pressure state so that the pressure in the steam pot 20 is equal to or higher than the pressure during the heat treatment. Or, depending on the pressure at the time of heat treatment, a high pressure state that is slightly lower than the pressure at the time of heat treatment to such an extent that sudden pressure fluctuations occur and dry cracks do not occur on the surface of the wood after heat treatment. You may make it cool by submerging, keeping.

The predetermined high pressure state in the steam pot 20 during the cooling process is based on the measured value of a pressure gauge or the like while the pressurized water supply valve 24a and the pressurized air supply valve 25a are opened to supply pressurized water and pressurized air. The exhaust valve 26a may be adjusted by opening / closing control or opening control.
Further, the pressurized water is supplied so that the pressurized water supplied in the steam kettle 20 is not scattered in the steam kettle 20 in order to suppress pressure fluctuations in the steam kettle 20 and deterioration (metal fatigue) of the steam kettle 20 itself. It is preferable that the steam kettle 20 is gradually and gently supplied from below.
Further, in order to improve the cooling efficiency, when performing this cooling step, the pressurized water supply valve 24a and the drain valve 28a are controlled to open / close or the degree of opening is controlled so that the cooling water in the steam pot 20 is replaced. You may make it perform.

In the cooling step, instead of supplying the cooling water (pressurized water) directly into the steam pot 20, a container capable of storing the flitch material 1 and storing water is installed in the steam pot 20, You may make it supply pressurized water in this container. In this case, a water vapor supply pipe 23, a pressurized water supply pipe 24, a drain pipe 27, and a drain pipe 28 may be connected to the lower part of the container. In this case, the drain pipe 27 and the drain pipe 28 may be further connected to the lower portion of the steam pot 20. This container may be designed to be freely put into and out of the steam kettle 20.
In this way, by installing the container to which the pressurized water for cooling the flitch material 1 is supplied in the steam kettle 20, deterioration of the steam kettle 20 can be efficiently reduced. Further, in this case, the container may be made of stainless steel with little contamination as described above, and the steam kettle may be made of iron with pressure resistance. According to this, deterioration of the steam pot 20 can be reduced more efficiently.
Moreover, you may make it use the nitrogen gas from a viewpoint of the oxidation suppression of wood for the pressurized air introduce | transduced in the steam kettle 20 at the time of the said cooling process execution.

  Further, instead of supplying the cooling water and forcibly cooling the heat-treated wood (treated wood) as described above, after the heat treatment step, the water vapor supply valve 23a is closed and the wood core You may make it naturally cool until a part becomes below the said predetermined temperature. Alternatively, the steam supply port 23a is closed, and the pressurized air supply valve 25a and the exhaust valve 26a are controlled to open / close or open in a state where the inside of the steam vessel 20 is maintained at a predetermined high pressure state. It is good also as an aspect which replaces the inside gas and cools.

After performing the cooling step, the pressurized water supply valve 24a and the pressurized air supply valve 25a are closed, the exhaust valve 26a and the drain valve 28a are opened, and the pressure in the steam kettle 20 is returned to the atmospheric pressure. The cooling water inside is discharged out of the steam pot 20 (in-pot pressure reducing step).
When returning the pressure in the steam pot 20 to the atmospheric pressure, the pressure may be gradually returned to the atmospheric pressure so that a sudden pressure fluctuation does not occur.
The pressure reduction in the steam pot 20 may be performed by opening the exhaust valve 26a before discharging the cooling water in the steam pot 20 to the outside of the steam pot 20, or the exhaust valve 26a and the drain valve. 28a may be opened to discharge the cooling water. Further, after the cooling water is discharged (substantially, the pressure in the steam kettle 20 is lowered to some extent by discharging the cooling water). Alternatively, the exhaust valve 26a may be opened.

<Exact processing wood, assembly process>
After performing the above-mentioned pressure reduction process in the pot, the flitch material 1 as the treated wood is taken out from the steam pot 20 and subjected to precise finishing. For example, after being assembled in the assembly process described later, the flitch assembly 2 is sized to match the size (width and length) of the slice veneer 13. At this time, both ends in the longitudinal direction may be precisely processed by cross-cut saw processing, and the other surfaces may be precisely processed by molder processing.
Due to the precise processing of the entire surface of the flitch material 1, the low-molecular resin similar to phenol contained in the lignin, which is a composition component of wood, is altered in the heat treatment step, and is generated as a by-product on the surface of the flitch material 1. The deposited oxidation coloring matter having low light resistance is removed, and the entire surface of the flitch material 1 becomes smooth.

After each flitch material 1 is precisely processed as described above, as shown in FIG. 3 (a), the thickness surface of the flitch material 1 is laminated and adhered so as to face the adjacent flitch material 1, and the flitch assembly is performed. The body 2 is produced.
In the present embodiment, four flitch materials 1 are joined in the longitudinal direction, and are bonded together so that the lateral direction becomes three rows. Further, in the longitudinal direction, the flitch materials 1 bonded together are staggered. The flitch material 1 cut to an appropriate length is distributed and assembled and bonded so as to be displaced in a shape.
As an adhesive used for the above-mentioned laminated adhesion, an adhesive capable of adhering the wet-state flitch material 1 may be used. For example, a moisture-curing urethane adhesive or the like may be adopted.

<Slicing process (step 103)>
The flitch assembly 2 produced as described above is introduced into a laterally slicing machine in a wet state and sliced so as to have a predetermined thickness T (see FIG. 4A). The slice veneer 13 is produced as shown in FIG.
Here, the wet state refers to a state in which the moisture content of the flitch assembly 2 as a slice processing target after the heat treatment step is not less than a predetermined level, and the moisture content of the flitch assembly 2 is 30%. It is preferable from the viewpoint of slicing workability to be about the above.

The wood that has been heat-treated with high-pressure and high-temperature steam as described above (in this example, the flitch assembly 2) is homogenized, so that the wood is sliced in a wet state to produce a slice veneer 13 By adopting an aspect to improve slicing workability, compared to wood not subjected to heat treatment with high-pressure and high-temperature steam, reverse cracks that occur during slicing are less likely to occur, and a thick sliced veneer is efficiently produced. Can be produced.
Further, as in this embodiment, the wood as the heat treatment target is the flitch material 1 and the sliced single plate 13 is produced by slicing the flitch assembly 2 in which the flitch material 1 is assembled and bonded. However, since the slicing processability is improved even when the thickness is relatively thick, the sliced single plate 13 made of a plurality of sliced flitch materials can be easily obtained by slicing the flitched assembly 2 to which the flitched material 1 is assembled and bonded. Can be made. Therefore, in the subsequent laminating process, it is not necessary to stick a plurality of single plates so that they are individually arranged on the wooden base material, and the manufacturing process can be simplified.
Furthermore, for example, the heat treatment conditions (the treatment temperature, the treatment time, etc.) of each flitch material 1 to be assembled at the time of the heat treatment step described above are appropriately set, and the coloring degree of each flitch material 1 is adjusted. Thus, the flitch material 1 having a different color tone can be produced. The flitch materials 1 having different color tones are combined, bonded and sliced according to the taste and the like, and sliced to produce sliced single plates 13 having various pattern patterns (randomly stuck, parquet, checkered, etc.) You can also.

Although the said predetermined thickness T (refer FIG. 4 (a)) is good also as about 0.15 mm-0.25 mm similarly to a general projecting board, Preferably, slicing workability, cost property, and a wooden board-shaped building material are preferable. From the viewpoint of reduction in design properties and appearance deterioration, etc., it may be about 0.30 mm or more and 2.25 mm or less, more preferably about 0.35 mm or more and 2.00 mm or less.
If the predetermined thickness is less than the lower limit thickness, the wear resistance tends to be low, and the degree of exposure of the wood base material when a groove or chamfered portion having a predetermined shape is formed as described later. Tends to be large, and the design property tends to be low. On the other hand, if the thickness exceeds the upper limit, the cost tends to be high and the slice workability tends to be deteriorated, and the back surface of the slice single plate tends to crack.
By using the sliced veneer 13 having a predetermined thickness as described above, the design of the groove and the chamfered portion, which will be described later, is further improved as compared to a general protruding plate having a thickness of about 0.15 mm to 0.25 mm. In addition, the thickness of the wood base material due to wear or the like can be effectively and efficiently reduced, and deterioration of the appearance can be efficiently prevented.

  In the present embodiment, the wood as the heat treatment target is the flitch material 1, and the sliced plate 13 is produced by slicing the flitch assembly 2 in which the flitch material 1 is assembled and bonded as described above. However, it is not limited to such a mode. For example, the heat treatment target is a thick plate having a shape that matches the size of the desired wooden plate-shaped building material, and the above steps are executed on the plate as necessary, and then the plate is sliced. A slice veneer may be produced. In other words, one of the flitch materials is shaped according to the desired size of the wooden plate-shaped building material, and after performing each of the above steps as necessary, the slices can be sliced from the flitch material without assembling. You may make it produce a board.

<Lamination process (step 104)>
As shown in FIGS. 3 (b) and 3 (c), the sliced veneer 13 produced as described above is adhered to the wooden substrate 12 to produce the laminate 11.
As an adhesive used for this lamination | stacking adhesion | attachment, it is good also as various water-based adhesives, an emulsion adhesive, etc. For example, it is good also as a vinyl acetate adhesive or a rubber latex emulsion adhesive.
Moreover, after laminating the wooden substrate 12 and the sliced veneer 13 via an adhesive, it may be introduced into a hot press machine (hot press machine) and heated and pressed to be dried and cured.
The wood substrate 12 and the slice veneer 13 are laminated and bonded with a paper material or the like in order to promote the release of water vapor from the adhesive or slice veneer during hot pressing. Also good.
In addition, depending on the type of adhesive, instead of the heat-clamping mode, a cold press or natural drying may be used.

  As the above-mentioned wood base material 12, wood laminate boards such as plywood and LVL (single board laminate), wood boards such as particle boards, or wood fiber boards such as insulation boards and MDF (medium density fiber boards) The thing which processed the woody material into the plate shape is mentioned. Alternatively, a wood powder / plastic composite material (WPC) containing a wood powder, an inorganic filler, a compatibilizing agent, a colorant and the like in a predetermined content ratio may be processed into a plate shape in a synthetic resin material. These may be appropriately combined and laminated to form the wooden substrate 12. For example, the wood substrate 12 may be configured by laminating MDF, WPC, or the like having a relatively high surface hardness on the surface of a plywood or particle board.

<Surface processing step (step 105)>
After producing the laminated body 11 as mentioned above, the groove part 14 and the chamfering part 15 of a predetermined shape are formed in the surface 11a of the said laminated body 11, as shown to Fig.4 (a).
In this embodiment, as shown in FIG.4 (c), the several groove part 14 is formed in the length and width, and the chamfering part 15 is formed over the perimeter of four rounds.

In the present embodiment, as shown in FIG. 4A, the groove portion 14 has an angle θ1 formed by the surface 11a of the multilayer body 11 and the side surface of the surface edge (opening edge 14b) such that the surface 11a of the multilayer body 11 and the lower end It is formed so as to be larger than an angle θ2 formed with the side surface of the portion (bottom portion 14a). In other words, the opening angle on the opening edge 14b side (the angle between the inner wall surfaces on the groove opening side) is larger than the opening angle on the bottom portion 14a side of the groove portion 14 (the angle between both inner wall surfaces on the groove portion bottom side). In addition, it is formed so as to expand toward the opening side. In the illustrated example, the groove portion 14 is cut so that the bottom portion 14a reaches the layer of the wood substrate 12.
Moreover, in this embodiment, both inner wall surfaces are formed in a polyhedral shape (each two surfaces in the figure) so that corners 14c, 14c are formed in the middle of both inner wall surfaces of the groove portion 14, In other words, the relationship between the opening angles is such that the corners 14c and 14c are the refraction points, and the bottom side thereof has a steep taper shape, while the opening side has a gentle slope taper shape.

  In the illustrated example, these corners 14c and 14c are formed so as to be located in the layer of the wood substrate 12, and are approximately half the depth from the surface 11a of the laminate 11 to the deepest part of the groove 14. It is formed to be the position of. The positions and number of the corners 14c and 14c depend on the number of faces of each inner wall surface, the opening angle in each part, the width between the opening edges 14b and 14b of the groove 14 (groove width), the groove depth, and the like. It can be designed as appropriate.

Although the said groove width of the groove part 14 is based also on the construction aspect of the wooden board-shaped building material 10 after manufacture, interior materials, such as the flooring material 10 (refer FIG.4 (c)), an inner wall material, and a ceiling material like an example of a figure. When it is constructed, it is preferable to set the thickness to about 2.0 mm or more and 8.0 mm or less from the viewpoints of design properties and touch feeling. That is, as shown in FIG. 4A, when the groove portion 14 has a symmetrical shape with a center line passing through the bottom portion 14a, the width from the opening edge 14b of the groove portion 14 to the bottom portion 14a in a plan view. W is preferably about 1.0 mm or more and 4.0 mm or less.
If this width W is less than the lower limit width, the groove part itself is not conspicuous, the stereoscopic effect is lost, and it tends to be difficult from the viewpoint of workability. On the other hand, if the upper limit width is exceeded, the groove portion tends to be conspicuous, and the appearance is uncomfortable. In particular, when it is constructed as a flooring material, there is a tendency that uncomfortable feeling or the like occurs during walking.
In addition, the depth (groove depth) from the surface 13a of the slice single board 13 to the bottom part 14a of the groove part 14 is the same as the said groove width, when the wooden board building material 10 after manufacture is constructed as an interior material. May be from about half the groove width to about the same as the groove width.

Further, in the present embodiment, a plurality of groove portions 14 are formed along the joint portions (seams) of the flitch materials 1 that are assembled and bonded as described above (FIGS. 3A and 4). (See (c)).
As described above, by forming the groove portion 14 having a predetermined shape, the degree of exposure of the slice veneer 13 exposed on the inner wall surface of the groove portion 14 can be increased more efficiently than the degree of exposure of the wood base material 12, thereby improving the design. Can be improved.
Further, since the opening angle on the bottom 14a side is smaller than the opening angle on the opening side, a three-dimensional effect can be efficiently expressed in the groove portion 14, and it is close to a solid laminated material in which a solid material is abutted in the groove portion 14. Appearance can be exhibited and design properties can be further improved.

Furthermore, as described above, if the thickness T of the slice veneer 13 is made thick and the groove portion 14 having the predetermined shape is formed, the exposure of the wood substrate 12 on the inner wall surface of the groove portion 14 is prevented. It can be effectively reduced or eliminated, and the appearance of the surface of the wooden plate-like building material 10 can be further improved.
In addition, the sliced veneer 13 is produced by assembling the flitch materials 1 having different coloring degrees, and the groove portions 14 having the predetermined shape are formed along the joints, so that both inner wall surfaces of the groove portions 14 are formed. Since the color tone of each exposed slice veneer 13 is different, the appearance can be made closer to a solid laminated material.
The location and number of the groove portions 14 can be selected as appropriate from the viewpoint of design and the like. Instead of the embodiment in which the groove portions are formed along all the vertical and horizontal seams as shown in the figure, for example, in the longitudinal direction The groove may be formed only at the seam along the line.

The chamfered portion 15 is formed in a polyhedral shape with the corner portion 15c as a refracting point, like the groove portion 14, and the shape and size thereof are symmetrical to the left and right of the groove portion 14 with a center line passing through the bottom portion 14a. The shape is substantially the same as the shape on one side. That is, the angle θ1 formed between the surface 11a of the laminate 11 and the side surface of the surface edge (upper edge 15b) is larger than the angle θ2 formed between the surface 11a of the laminate 11 and the side surface of the lower end (lower edge 15a). It is formed to become. In other words, the gradient of each surface of the chamfered portion 15 having a polyhedral shape is substantially the same as the gradient of the inner wall surface of the groove portion 14, and from the upper edge 15b to the lower edge 15a in a plan view. The width W is substantially the same as the width W of the groove 14, that is, approximately half the groove width, and the depth from the surface 13 a of the slice veneer 13 to the lower edge 15 a of the chamfered portion 15 is the above-described depth. The dimensions are approximately the same as the groove depth.
In other words, in the present embodiment, when adjacent wooden plate-like building materials (floor material 1 in the illustrated example) are joined to each other, the ends of these wooden plate-like building materials are formed by the chamfered portions formed in the respective wooden plate-like building materials. A chamfered portion 15 is formed between the portions so that a joint groove having substantially the same shape and shape as the groove portion 14 is formed.

The grooves 14 and the chamfered portions 15 can have various shapes as will be described later. However, as described above, the bottom portion 14a of the groove 14 reaches the layer of the wood substrate 12. When the chamfered portion 15 is formed so that the wood base material 12 is exposed, the exposed area of the slice veneer 13 is the wood quality in the portion where the groove portion 14 and the chamfered portion 15 are formed. These groove portions 14 and chamfered portions 15 are preferably formed so as to exceed the exposed area of the substrate 12. In such a case, it is preferable that the ground color of the wooden substrate 12 is close to the ground color of the sliced veneer 13.
Moreover, although the cross-sectional shape of the groove part 14 and the said joint groove made into the substantially same dimension same shape is illustrated in the example of a figure, they are good also as what was made into mutually different cross-sectional shape.
Further, in the illustrated example, the groove portion 14 and the chamfered portion 15 are shown so that the wood base material 12 is exposed in the formed portions, but as described above, according to the present embodiment. Since the slice veneer 13 can be made relatively thick, the groove 14 and the lower end portions 14a and 15a of the chamfered portion 15 may be formed so as to stop within the thickness of the slice veneer 13. . According to this, the design property of a wooden board-shaped building material can be improved more, without exposing the wooden base material 12 in these parts.

Moreover, in this embodiment, when forming the groove part 14 and the chamfered part 15 as described above, or in the steps before and after the groove part 14, adjacent to the four peripheral ends of the laminate 11 as shown in FIG. The male solid part 17 and the female real part 18 that are actually joined to the wooden plate-shaped building material (floor material 10 in the illustrated example) are formed.
Such real parts 17 and 18 constitute a joint part for joining adjacent wooden plate-like building materials, and in the illustrated example, a real joint structure including a male real part 17 and a female real part 18 is employed. Alternatively, other joining structures such as hiring actual joining or phase stacking joining structures may be used, and such actual joining parts may not be provided.

In addition, you may make it form the process of the above-mentioned groove part 14, the chamfering part 15, and the real parts 17 and 18 with appropriate wood processing tools, such as a trimmer, a router, a tenoner, and a cutting saw, and a wood cutting tool. As shown in the example, when the vertical groove is provided over the entire length in the longitudinal direction and the horizontal groove is provided in a zigzag manner between the vertical grooves, the vertical groove is cut and sewn from the viewpoint of productivity. Etc., and the lateral groove may be formed by a router. Such a tool can be appropriately selected according to the desired shape of the groove 14 and the chamfer 15.
Further, the surface 11a of the laminate 11 may be subjected to a surface finishing process (surface polishing process) with a wide belt sander before forming the groove part 14, the chamfered part 15, and the real parts 17 and 18. At this time, although the count used depends on the tree species used for the slice veneer 13, the count may be about 180 to 320 and the surface 11a of the laminate 11 may be polished so as to be smooth. Further, after the formation of the groove portion 14 and the like, the surface polishing treatment may be performed including the inner wall surface of the groove portion 14 and the chamfered portion 15. According to this, fuzz of the opening edge 14b of the groove part 14 and the upper end edge part 15b of the chamfered part 15 can be reduced.

<Coating process (step 106)>
A predetermined coating is applied to the surface (including the groove portion 14 and the chamfered portion 15) 11a of the laminate 11 subjected to the surface processing as described above, and a coating layer 16 is formed as shown in FIG. To do.
In addition, in FIG.4 (b) and FIG.5 (a)-(c) mentioned later, although the example which formed the coating-film layer also in the side end surface of each laminated body is shown, to the lower end edge part of each chamfering part A coating layer may be formed.

In this coating process, the slice veneer 13 is thermally colored and heat-resistant by heat treatment with high-pressure and high-temperature steam. Therefore, a high-concentration paint is used to provide light resistance and the like. There is no need to apply a thick coat. Therefore, the coloring process is performed with a paint that does not hinder the color tone of the surface 11a of the laminate 11.
This coloring treatment is performed so that the color difference ΔE between the surface 11a of the laminate 11 that has been subjected to the surface treatment treatment as described above and the surface after painting is about 4.0 or less. You may make it apply | coat a low and low concentration coating material and color dough.
Thus, by applying the fabric coloring so that the color difference ΔE between the ground color of the surface 11a of the laminate 11 and the painted wooden plank building material is relatively small, the surface of the painted wooden plank building material is reduced. The wood texture is not hindered and the design can be improved.

  Moreover, by setting it as such finish coating, combined with the cutting surface of the slice single board 13 which comprises the inner wall surface of the groove part 14 and the chamfering surface of the chamfering part 15 being thermally colored, A difference in color tone (shading) between the inner wall surface and the chamfered surface of the chamfered portion 15 and a surface other than these hardly occurs or is hardly conspicuous, and the design can be improved. Therefore, the shape of the groove part 14 and the chamfering part 15 processed into the surface 11a of the laminated body 11 can be made into various desired shapes, and the wooden board-like building material 10 having a three-dimensional effect and high design can be manufactured.

  Furthermore, by using the finish coating as described above, the surface of the woody plate-shaped building material 10 after production is worn and the coating layer 16 disappears or the slice veneer 13 itself is worn. As described above, the color difference ΔE before and after coating is small, and the entire slice veneer 13 is thermally colored. Therefore, as long as the entire slice veneer 13 at the wear site does not disappear, before and after the disappearance of the coating film or before and after the wear. And the site | part and the other site | part do not feel discomfort, and it can prevent deterioration of an external appearance.

The color difference ΔE may be based on the L ^* a ^* b ^* color system or the Hunter Lab color system.
The low-concentration paint may be, for example, an aqueous synthetic resin paint obtained by diluting an aqueous synthetic resin colorant mainly containing pigments of various colors as coloring components with a diluent. You may make it add a viscosity modifier and surfactant suitably to such an aqueous synthetic resin colorant. In addition, the blending ratio of the pigment with respect to the diluent may be a low-concentration paint having a low concealing property so that the color difference ΔE with the surface 11a of the laminate 11 is about 4.0 or less as described above. For example, when painting using a sponge roll, it is good also as 0.5% or more and about 15% or less. Such a dilution ratio of the paint can be appropriately selected depending on the application method from the viewpoint of applicability.
Further, after performing the fabric coloring treatment as described above, a clear paint may be further applied as a finish coating.

Various coating methods can be used as the coating method for each paint. However, using the roll coater method, for example, compared to spray coating, waste of paint due to scattering or the like is necessary. Does not occur, and productivity can be improved. In addition, by using the roll coater method, for example, the coating amount can be finely adjusted compared to the curtain flow coater method, so that it is difficult to form shading and the like, and the design of the wooden plate-shaped building material after painting is improved. It can be improved more efficiently.
Further, the ratio of the pigment or dye as the coloring component of the paint described above can be appropriately selected according to the ground color of the surface 11a of the laminate 11 to be painted, the desired color tone after painting, etc. A white paint may be used so as not to disturb the texture, but a semi-transparent paint or a light color paint may also be used.
Furthermore, as the coating material, a white or other aqueous stain may be appropriately diluted.

Through the respective steps as described above, as shown in FIG. 4 (c), a flooring 10 as a wooden plate-like building material is manufactured.
As mentioned above, according to the manufacturing method of the wooden plate-shaped building material which concerns on this embodiment, while being able to reduce the discomfort of the surface in the wooden plate-shaped building material 10 in which the groove part 14 and the chamfered part 15 were formed in the surface, The woody plate-shaped building material 10 with high designability can be manufactured.
Further, as described above, when the opening edge 14b side of both inner wall surfaces of the groove portion 14 and the upper edge portion 15b side of the chamfered portion 15 are inclined surfaces with respect to the surface, as described above. In addition, by performing a predetermined coloring process, color unevenness or the like hardly occurs at the opening edge 14b or the upper edge 15b, and the uncomfortable feeling can be reduced. Further, even when the bottom 14a side of both inner wall surfaces of the groove 14 and the lower end edge 15a side of the chamfered portion 15 are steeply inclined with respect to the surface, the predetermined coloring treatment is performed as described above. In combination with the fact that the gradient is steep, the difference in color tone is not noticeable, and the uncomfortable feeling can be reduced.

Next, a modification of the wooden plate-shaped building material manufactured using the method for manufacturing a wooden plate-shaped building material according to the present embodiment will be described with reference to FIG.
The main difference from the above-mentioned wood plate building material 10 is the shape of the groove and the chamfered portion, and the same components are denoted by the same reference numerals, and description thereof will be omitted or simplified.

<First Modification>
In a woody plate-shaped building material 10A according to the first modification shown in FIG. 5A, the groove portion 14A has a substantially V-shaped cross section in which both inner wall surfaces are not multi-faced but are flat.
The opening angle θ3 of the groove portion 14A is an obtuse angle in which both inner wall surfaces have a relatively gentle tapered shape, and is, for example, about 100 degrees to 120 degrees.
The shape of the chamfered portion 15A is substantially the same as that of the groove portion 14A, as is the case with the chamfered portion 15 of the wooden plate-like building material 10 described above, when the adjacent wooden plate-like building materials are joined together. It is formed to have the same shape. Hereinafter, since the same applies to each modification, the description of the shape of the chamfered portion will be omitted or briefly described in the following modification.
As described above, when both the inner wall surfaces of the groove portion 14A and the chamfered portion 15A are gently inclined with respect to the surface as in this modification, the predetermined coloring process is performed as described above. As a result, color unevenness or the like hardly occurs at the opening edge 14b or the upper edge 15b, and the uncomfortable feeling can be reduced.

<Second Modification>
5B, the wood plate-like building material 10B according to the second modified example has a groove portion 14B in which both inner wall surfaces are not multi-faced, and both are planar, as in the first modified example. The cross section is substantially V-shaped.
Further, the opening angle θ3 of the groove 14B is an acute angle in which both inner wall surfaces have a relatively steep tapered shape, and is, for example, about 30 to 80 degrees.
Thus, even when both the inner wall surfaces of the groove portion 14B and the chamfered portion 15B become steep inclined surfaces with respect to the surface, the cutting surface of the slice single plate 13 exposed to the groove portion 14B and the chamfered portion 15B is used. Is colored by heat, and when the above-mentioned predetermined coloring treatment is performed, even when coloring is insufficient due to coating in the groove portion 14B, etc., the difference in color tone from other parts Is less noticeable and can reduce the sense of incongruity.

<Third Modification>
A wooden plate-like building material 10C according to the third modification shown in FIG. 5 (c) has a groove 14C formed in an open shape toward the opening side, and has a convex curved shape (R Surface shape).
In this case as well, the opening angle on the opening edge 14b side than the opening angle on the bottom portion 14a side of the groove portion 14C (the angle formed by the tangent lines of both inner wall surfaces on the groove bottom portion side) is the same as the groove portion 14 of the wood plate building material 10 described above. It is formed in an open shape toward the opening side so that the angle formed by the tangent lines of both inner wall surfaces on the groove opening side becomes larger. That is, the groove 14C is formed so that the angle formed by the surface 11a of the multilayer body 11 and the tangent line of the side surface of the opening edge 14b is larger than the angle formed by the surface 11a of the multilayer body 11 and the tangent line of the side surface of the bottom portion 14a. ing.
Even in this case, the same effect as that of the groove portion 14 and the chamfered portion 15 of the above-described wooden plate-like building material 10 is obtained, and both the inner wall surface and the chamfered portion 15C of the groove portion 14C are rounded, so that a soft impression is given. As well as giving, it feels good.

<Fourth Modification>
In the wooden plate-like building material 10D according to the fourth modified example shown in FIG. 5 (d), both the inner wall surfaces of the groove portion 14D are not multi-faced, as in the first modified example. The cross section is substantially V-shaped, and the bottom portion 14Da has a rectangular groove shape with a substantially rectangular cross section.
The square groove width of the bottom portion 14Da depends on the groove width W of the groove portion 14D itself, but may be, for example, a narrow groove shape of about 0.3 mm to 1.5 mm. By providing such a square groove at the bottom, it is possible to give a deep impression, and it is possible to prevent damage to the cutting tool or the like during groove processing.
Further, in this modification, the thickness T of the slice veneer 13 is made thicker than the other examples, and the bottom portion 14Da of the groove 14D does not reach the layer of the wood base material 12 so that the slice veneer 13 It is formed to stop in the layer.
In addition, the opening angle θ3 of the groove portion 14D is substantially a right angle (about 80 degrees to 100 degrees) in the illustrated example.

Furthermore, a dark line 19 is applied to the bottom portion 14Da of the groove portion 14D along the longitudinal direction of the groove portion 14D.
The dark color line 19 may be executed in the pre-process or post-process of the above-described coating process, and the color tone may be darker than the paint of the predetermined coloring process.
The dark line 19 may be formed by, for example, ink-jet coating, laser baking, transfer using a narrow roll, or the like.
Further, the width of the dark color line 19 depends on the groove width of the groove portion 14D itself, but may be, for example, a thin line shape of about 0.1 mm to 1.0 mm.

As in this modification, by applying the dark color line 19 to the bottom portion 14Da of the groove portion 14D, a deeper impression can be given to the bottom portion 14Da of the groove portion 14D, and a solid material is abutted against the groove portion 14D. Appearance close to that of solid laminated wood can be exhibited, and the design can be further improved. A dark line similar to the above may be applied to the lower end step portion 15Da of the chamfered portion 15D corresponding to the bottom portion 14Da having a square groove shape along the longitudinal direction of the chamfered portion 15D.
In addition, at least one of the square groove at the bottom and the dark line described in the present modification, the groove 14 (the chamfered portion 15) of the above-described wood plate building material 10, and each groove of each modification, You may make it provide in each chamfering part.

As described above, according to the method for manufacturing a wooden plate-shaped building material according to the present embodiment, even when the groove portion and the chamfered portion have various shapes, it is difficult for a sense of incongruity to occur in the groove portion and the chamfered portion. Therefore, the shape of a groove part and a chamfering part can be made into various desired shapes, and a wooden board-like building material having a three-dimensional feeling and a high design property can be manufactured.
In addition, the groove shape (and chamfering shape) shown in each example described above is only an example, and may have another shape. For example, a taper shape with a steep slope on the bottom side and an R-side shape on the opening side, or a reverse side, a R-side shape on the bottom side and a taper shape with a gentle slope on the opening side, etc. It can be a shape.

In addition, the wooden plate-shaped building material manufactured by the method for manufacturing a wooden plate-shaped building material according to the present embodiment is not limited to the one constructed as a flooring material, and the ends are joined to each other by the chamfered portions. It is good also as other interior materials, such as the wall material and ceiling material in which a gravel is formed. Or you may make it manufacture another interior panel material, door material, various structure members, furniture material, etc. with the manufacturing method of the wooden board-shaped building material which concerns on this embodiment.
Furthermore, in this embodiment, although what chamfered part was formed over the perimeter of the four circumferences of the surface edge part of a wooden board-shaped building material is illustrated, a chamfer part is formed in the surface edge part of at least one side. You may do it.
Furthermore, in this embodiment, although the thing which formed both the groove part and the chamfering part on the surface of a wooden board building material is illustrated, you may make it form only any one of these.

Next, an example of a wood board building material manufactured by the manufacturing method according to the present invention and a comparative example will be described below.
In each example and each comparative example, the wood substrate is a plywood having a thickness of 12 mm, and the beech material of raw material having a moisture content of about 40 to 62% (dry base) is a predetermined size (thickness 50 mm). Twelve flitch materials formed to have a width of 110 mm and a length of 600 mm were used as wood to be treated.

<Flitch material processing conditions>
In each example, the 12 flitch materials were laminated with a crosspiece interposed in the same manner as described above, and the heat treatment with high-pressure and high-temperature steam was performed. The treatment temperature during this heat treatment was 135 ° C., the temperature raising time was 30 minutes, and the subsequent treatment time was 2 hours.
Moreover, after performing the said heat processing by a high voltage | pressure high temperature steam, it submerged and cooled, maintaining a high voltage | pressure state as mentioned above. The cooling time was 30 minutes, and after cooling until the flitch material temperature was 90 ° C. or lower, the inside of the steam kettle was depressurized, and the flitch material was taken out and precisely processed. Next, the flitch material was assembled and bonded with a moisture-curing urethane adhesive as described above to produce a flitch assembly.
On the other hand, in each comparative example, the above-mentioned 12 flitch materials were subjected to precise processing without being subjected to heat treatment or the like and assembled and bonded to produce a flitch assembly.

<Slicing conditions>
Each of the flitch assemblies produced as described above was sliced with a transverse slicer to produce sliced single plates having a predetermined thickness (0.35 mm).

<Lamination conditions>
Each slice veneer produced as described above was laminated and adhered to the surface of the wood substrate with a vinyl acetate adhesive to produce a laminate. At this time, the coating amount was set to about 90 g / m ^2, and after lamination, it was introduced into a hot press machine (hot press machine) and heat-pressed. The pressing conditions at this time were a mold surface temperature of 110 ° C., a pressing pressure of 3 kgf / cm ² (about 0.29 MPa), and a pressing time of 60 seconds.

<Surface processing conditions>
The surface of each laminate produced as described above was polished with a 240th wide belt sander, and then a groove and a chamfered portion having a predetermined shape were formed by machining.
In Example 1 and Comparative Example 1, the multi-sided expanded shape (similar to FIG. 4B) described in the wooden plate-shaped building material 10 according to the first embodiment described above was used, and the width W was 1.5 mm. .
In Example 2 and Comparative Example 2, the gentle slope shape (similar to FIG. 5 (a)) described in the wood board building material 10A according to the first modified example described above was used, and the width W was 1.5 mm.
In Example 3 and Comparative Example 3, the steep slope shape (similar to FIG. 5B) described in the wood board building material 10B according to the second modification described above was used, and the width W was 1.0 mm.
In Example 4 and Comparative Example 4, the R-plane shape (similar to FIG. 5C) described in the woody plate-shaped building material 10C according to the third modification described above was used, and the width W was 1.5 mm.
In Example 5, Example 6, and Comparative Example 5, the shape (FIG. 5 (d)) has a square groove (step part) in the bottom part (lower end part) described in the wooden plate-like building material 10D according to the fourth modification described above. ) And the groove width W was set to 3.0 mm.
In addition, the depth of the groove part and chamfering part in each Example and each comparative example was 1.5 mm.

<Coating conditions>
A dark line having a width of about 0.3 mm was applied along the longitudinal direction of the groove by a laser to the bottom of the groove of the laminate of Example 6 in which the groove and the chamfer were formed as described above.
Moreover, the following coating finish was performed with the roll coater on the surface of the laminated body of each Example and each comparative example which included this Example 6 and formed the groove part and the chamfered part as described above.

In each example, as a fabric coloring treatment, an aqueous colorant (72% white pigment (titanium oxide), 1.2% black pigment (carbon black), 4% red pigment (organic), 22.8 yellow pigment (organic). %, A viscosity adjusting agent and a surfactant added), and a dough-colored coating material diluted to 2% with a dedicated diluent (Natco Co., Ltd.).
This dough coloring paint was applied with a sponge roll, scraped with a reverse roll, and further applied with a rubber roll, so that the coating amount was 14 to 16 g / m ² . After the application, it was dried with a hot air dryer at 140 ° C. for 45 seconds.

After the above fabric coloring treatment, the following clear coating was further performed as a finish coating.
As an undercoat, urethane-based clear paint (Sanyu Paint Co., Ltd. NYX-S-701) was applied with a rubber roll at 80 g / m ^{2 and then} dried with a blower. Next, polishing was performed with a 240th wide belt sander, and as a top coat, urethane-based clear paint (Sanyu Paint Co., Ltd. NYX-E-800) was applied with a rubber roll at 60 g / m ² and then dried with a blower. , With clear paint.
As a result of measuring the color difference between the surface of the laminate before coloring the fabric of each Example and the surface of the laminate after coloring the fabric with a spectrocolorimeter (L ^* a ^* b ^* color system), the color difference ΔE is: All were 4.0 or less.

On the other hand, in each comparative example, as a fabric coloring treatment, an aqueous colorant (white pigment (titanium oxide) 75%, black pigment (carbon black) 1.2%, red pigment (organic) 4%, yellow pigment (organic) 19 (8) Viscosity modifier and surfactant added), and a dough-colored coating material diluted to 20% with a dedicated diluent was used (Natco Co., Ltd.).
In addition, the application amount and the application method are the same as those in the above embodiments, and the same applies to clear coating.
As a result of measuring the color difference between the surface of the laminate before coloring the fabric of each of the comparative examples and the surface of the laminate after coloring the fabric with a spectrocolorimeter (L ^* a ^* b ^* color system), the color difference ΔE is: All were significantly higher than 4.0.

The surfaces of the above-described Examples 1 to 6 and Comparative Examples 1 to 5 were observed visually.
As a result, in each Example, there was no discomfort in appearance between the groove and the chamfered portion and the other surface portion (plane portion), and the result was a good result.
In particular, Examples 1, 4, 5, and 6 exhibited an appearance close to that of a solid laminated material in which a solid material was abutted at the groove portion, and had a higher design.
On the other hand, in each comparative example, the color unevenness of the fabric coloring was conspicuous, and the result was a noticeable discomfort in appearance between the groove and the chamfered portion and the other surface portion (planar portion).
In particular, in Comparative Examples 1, 2, and 4, the boundary between the groove portion and the chamfered portion and the surface portion (planar portion) was not linear, resulting in noticeable color unevenness.
Further, in Comparative Examples 1, 3, 4, and 5, there was a noticeable lack of coloring at the bottom of the groove and the inner wall surface.

1 Flitch material (wood)
10, 10A, 10B, 10C, 10D Floor material (woody building material)
DESCRIPTION OF SYMBOLS 11 Laminated body 11a Surface of laminated body 12 Wood base material 13 Slice single board 14, 14A, 14B, 14C, 14D Groove part 14a Bottom part of groove part (lower end part of groove part)
14b Opening edge of groove (surface edge of groove)
15, 15A, 15B, 145, 15D Chamfered portion 15a Lower edge of chamfered portion (lower end portion of chamfered portion)
15b Upper edge of chamfered portion (surface edge of chamfered portion)
19 Dark line W Width of groove and chamfered portion θ1 Angle formed between side surface of surface edge and laminate surface θ2 Angle formed between side surface of lower end portion and surface of laminated body

Claims (5)

The wood that has been heat-treated with high-pressure and high-temperature steam is sliced in a wet state to produce a sliced veneer, and this sliced veneer is attached to a wooden substrate to produce a laminate, and then the laminated Forming at least one of the groove and the chamfered portion on the surface of the body,
Next, a method for producing a woody plate-shaped building material, wherein the surface is colored with a paint that does not inhibit the color tone of the surface of the laminate. In claim 1,
A method for producing a woody plate-shaped building material, wherein the color treatment is performed so that a color difference ΔE between the surface of the laminate before the color treatment and the surface of the laminate after the color treatment is 4.0 or less. In claim 1 or 2,
At least one of the groove and the chamfered portion is formed so that an angle formed between a surface edge side surface and the surface of the laminate is larger than an angle formed between a lower end side surface and the surface of the laminate. A method for producing a woody plate-shaped building material, characterized in that it is made. In any one of Claims 1 thru | or 3,
After forming at least one of the groove portion and the chamfered portion, a dark color line is applied to the lower end portion along the longitudinal direction of the formed groove portion and chamfered portion. Manufacturing method of plate-shaped building materials. In any one of Claims 1 thru | or 4,
That at least one of the groove portion and the chamfered portion is formed so that a width from a surface edge portion to a lower end portion in a planar view is 1.0 mm or more and 4.0 mm or less. A method for producing a wooden plate-shaped building material.

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