JP2010048004A - Tabular building material - Google Patents

Abstract

The present invention provides a plate-shaped building material that can improve the cleaning performance on the surface of the joint portion between the plate-shaped building materials that are actually bonded to each other.
A plate-shaped building material 10 having actual joint portions 2a, 2b at at least one side end portion thereof, and when the actual joint with adjacent plate-shaped building materials is mutually performed, these plate-shaped building materials. A joint groove 9 is formed between the side end portions of each other, and the joint groove has a bottom surface 7a, 8a having a substantially planar shape or a curved surface shape, and is formed as a continuous surface in a flush manner. The walls 7b and 8b are shaped to expand from the bottom.
[Selection] Figure 1

Description

  The present invention relates to a plate-shaped building material provided with an actual joint.

As a plate-like (panel-like) building material used for interior materials such as building floor materials, inner wall materials, and ceiling materials, it is actually bonded to at least one side end (for example, both side ends along the longitudinal direction). The plate-shaped building material provided with the part is used widely.
Such a plate-shaped building material is constructed so as to spread a plurality of plate-shaped building materials on a floor substrate or a wall substrate by actually bonding each other's actual bonding portion.

There are various types of joining in the above actual joining, but generally, one is a male part that protrudes from the side end face and the other is a female part that is notched in a concave groove shape. There are a mode of joining (actual joining), a mode in which both end faces are cut into concave grooves to form employment tenons on each of them, and the employment tenons are fitted into the hiring tenons (joining actual joining).
For example, Patent Document 1 below proposes a flooring material that has a structure in which a male real part and a female real part formed in the longitudinal part of the flooring are brought into contact with each other and actually joined.
Moreover, in the following Patent Document 2, a plate material is proposed in which a male real part and a female real part formed in the longitudinal part are brought into contact with each other and actually joined.
JP 2007-113244 A (see FIG. 2) Japanese Patent Laying-Open No. 2007-154424 (see FIG. 2)

By the way, the plate-shaped building materials to be actually bonded as described above are generally chamfered on the surface side edge portions of both side end portions where the actual bonded portions are provided, as disclosed in the respective patent documents. Are formed, and when the actual joining with the adjacent plate-shaped building materials is mutually performed, the chamfered portion between the side end portions of these plate-shaped building materials makes the V-groove joint groove. Is formed.
In the case where such V-groove joint grooves are formed between the side ends of the actually joined plate-shaped building materials, dust, dirt, etc. easily accumulate in the joint grooves, and dust, dirt, etc. When it adheres, it is difficult to wipe off, and improvement of the cleaning property has been desired.

  This invention is made | formed in view of the said situation, and it aims at providing the plate-shaped building material which can improve the cleaning property in the junction surface of the plate-shaped building materials actually joined mutually.

  In order to achieve the above-mentioned object, the plate-shaped building material according to the present invention is a plate-shaped building material provided with actual joint portions at at least one side end, and the actual bonding with the adjacent plate-shaped building materials is mutually performed. When made, a joint groove is formed between the side ends of the plate-shaped building materials, and the joint groove has a flat surface or a curved surface shape, and a flat surface and a continuous surface. In addition, the both side walls are shaped to expand from the bottom.

In the said plate-shaped building material which concerns on this invention, as a structure provided with the base material made from the wood powder and the plastics composite material, and the decorative material stuck on the surface of this base material, the bottom part of the said joint groove is formed. The structure may reach the surface or layer of the substrate.
The said base material is good also as a structure containing 40 mass% or more inorganic fillers and 5-30 mass% wood flour with respect to the total mass of the said base material.
Moreover, you may make it form the said base material by extrusion molding so that an extrusion direction may become the same direction as the longitudinal direction of the said joint groove.

In the plate-shaped building material according to the present invention, the joint groove may be configured to have a substantially inverted isosceles trapezoidal cross section.
Or in the said plate-shaped building material which concerns on this invention, you may make the said joint groove into the structure by which the cross section was made into the concave curve shape.

In the plate-shaped building material according to the present invention, the bottom portion of the joint groove formed between the side end portions of the plate-shaped building materials is substantially flat when the actual bonding with the adjacent plate-shaped building materials is mutually performed. It is made into a shape or a curved surface shape so as to be a continuous surface, and both side wall portions of the joint groove are formed to expand from the bottom. Thereby, even when dust, dirt, or the like adheres to the joint groove between the side end portions that are formed when they are actually joined to each other, it is easy to wipe off and improve the cleanability. That is, the joint groove formed on the surface of the joint portion is not a V-groove joint groove as in the prior art, but is formed into a shape that is easy to clean without forming a right-angled part or an acute angle part in the joint groove. Cleanability is improved.
Further, since the adjacent plate-shaped building materials are configured so that the actual joints of each other are actually joined, the displacement in the thickness direction is reduced, and a step or the like is formed at the bottom of the joint groove. And it is possible to form a continuous surface in a flush manner.

In the plate-shaped building material according to the present invention, as a configuration comprising a base material made of a wood powder / plastic composite material and a decorative material adhered to the surface of the base material, the bottom portion of the joint groove, If it is configured to reach the surface or layer of the substrate, the following effects can be obtained.
That is, the joint groove is joined to the surface side edges of both side edges of the plate-shaped building material by having the bottom reach the surface or layer of the base material made of wood powder / plastic composite material. When the step portion for forming the joint groove having the above-mentioned shape when formed is formed, it is less likely to stand up compared to those formed on the wood material. Thereby, the wipeability in the bottom part of a joint groove is improved more.
In addition, since the base material is made of a wood powder / plastic composite material, the expansion and contraction of the plate-like building material due to moisture absorption / release and temperature change are reduced compared to those made of a wood material, It becomes a plate-shaped building material in which dimensional change or the like hardly occurs after construction. As a result, even when there is moisture absorption / release or temperature change after construction, the bottom of the joint groove formed on the surface of the joint as described above is less likely to be displaced, gaps, etc. It can be a continuous surface.

If the base material is composed of 40% by mass or more of inorganic filler and 5% by mass to 30% by mass of wood flour with respect to the total mass of the base material, a relatively large amount of inorganic filler is used. Therefore, the surface hardness is increased, and the crack resistance, scratch resistance, caster resistance and the like are excellent. Therefore, it is suitable for interior materials for buildings that require high surface hardness, particularly floor materials, waist walls, inner walls, etc., which are constructed in places where repeated loads are applied by stepping on, casters or the like.
Moreover, the expansion | swelling and shrinkage | contraction of the said plate-shaped building material by the above moisture absorption / release and a temperature change can be reduced more effectively, and will have high dimensional stability. In addition, since the content of the wood flour is relatively small, as in the above, the fluttering at the stepped portion formed on the base material to form the joint groove is more effectively reduced, and the wiping property is improved. More improved.

  Further, if the base material is formed by extrusion molding so that the extrusion direction is the same as the longitudinal direction of the joint groove, the orientation direction of wood powder and the like contained in the base material is the joint groove. It becomes the same direction as the longitudinal direction of the said step part for comprising. Thereby, after sticking the decorative material, when the stepped portion is formed, the exposure rate of the wood flour exposed to the surface of the stepped portion is compared with the case where it is formed in the other direction (diagonal or orthogonal direction, etc.) Thus, it is possible to more effectively reduce the vertical rise in the stepped portion formed on the base material, and it is possible to further improve the wiping property.

In the plate-shaped building material according to the present invention, if the joint groove is configured to have a substantially inverted isosceles trapezoidal shape in cross section, as described above, a right angle portion, an acute angle portion or the like is not formed in the joint groove. It becomes a shape which is easy to do, and cleaning property is improved.
Alternatively, in the plate-shaped building material according to the present invention, if the joint groove is configured to have a concave curved cross section, the shape having the trapezoid joint groove, another obtuse angle portion, or the like. As compared with the joint groove, the cleanability is further improved.

The best mode for carrying out the present invention will be described below with reference to the drawings.
1 (a) and 1 (b) both schematically show a plate-shaped building material according to the first embodiment, (a) is a schematic longitudinal sectional view of the plate-shaped building material, and (b) is the same plate. FIGS. 2A to 2D are schematic longitudinal sectional views for explaining an example of the process for forming the plate-shaped building material. .
The surface of each member described below refers to the upper surface when, for example, a plate-shaped building material is applied to a floor material, and the surface on the indoor space side (front side surface) when applied to an inner wall or a waist wall. Pointing.
Moreover, each sectional drawing has shown the cross section of the transversal direction orthogonal to the longitudinal direction of the plate-shaped building material made into the elongate shape.

As shown in FIG. 1B, the plate-shaped building material 10 according to the present embodiment is constructed on a floor base bs such as a joist or a discarded plywood by actually bonding a plurality of plate-shaped building materials 10 to each other. Floor material 10 to be used.
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. 1 (a), the floor material 10 roughly constitutes a floor base material 1 and a decorative material attached to the surface 3a of the floor base material 1 with a paper material 5 interposed therebetween. The projecting plate 4, stepped portions 7 and 8 that form joint grooves 9 that are formed along the longitudinal direction at the surface side edges of both side end portions along the longitudinal direction and are actually joined, and the projecting plate 4 and the coating layer 6 formed on the surfaces of the step portions 7 and 8.
In addition, the plate-shaped building material 10 is not restricted to what is constructed | assembled as a flooring material, It is good also as a waist wall material, an inner wall material, a ceiling material, etc. which are actually joined and made.

The floor base material 1 is bonded to the surface side composite base material 3 constituting the base material made of wood powder / plastic composite material (WPB (wood plastic board)) and the back surface of the surface side composite base material 3. The woody base material 2 is provided.
The wood substrate 2 is made of a wood-based material such as a plywood, a particle board, or a wood fiber board such as MDF (Medium Density Fiberboard), and at both side ends along the longitudinal direction, Actual joint portions 2a and 2b are provided, respectively. One of the actual joint portions 2a and 2b is a male real portion 2a protruding from the side end surface, and the other is a female real portion 2b that is notched in a groove shape on the side end surface. Although not shown, actual joint portions 2a and 2b are also provided at both end portions along the short direction. Further, in the figure, reference numeral 2c denotes a receiving portion of a fixed stopper into which a fixed stopper ns such as a nail for fixing the floor material 10 to the floor base bs is driven (see FIG. 1B).

The surface-side composite base material 3 contains a thermoplastic resin, an inorganic filler, wood powder, a compatibilizing agent, and a colorant in a predetermined content ratio, and these are kneaded and formed by extrusion molding. .
Examples of the thermoplastic resin include polypropylene, polyethylene, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyvinyl acetate, polytetrafluoroethylene (Teflon (registered trademark)), ABS (acrylonitrile butadiene styrene), AS (acrylonitrile styrene), Examples include acrylic.
In particular, olefinic resins such as polypropylene and polyethylene are preferably employed from the viewpoint of performance and cost.

The inorganic filler is preferably a scaly fine particle having an aspect ratio (a value obtained by dividing the diameter of the particulate inorganic substance by the thickness) of 10 or more, and the inorganic kind is preferably mica, alumina, talc or the like.
As the wood powder, for example, sawdust discharged from a lumber mill or the like, those obtained by crushing and pulverizing waste wood, sander powder such as plywood, MDF, and particle board are used. As such wood flour, those having an average particle size of about 10 to 150 mesh are preferable from the viewpoint of moldability and dispersibility.
The compatibilizing agent can be appropriately selected according to the physical properties of the thermoplastic resin and the inorganic filler. When an olefin-based thermoplastic resin is employed, the maleic acid-modified olefin resin can be used. Good. For example, when a polypropylene resin is employed, a maleic acid-modified polypropylene resin may be used.

As said predetermined content rate, the said inorganic filler is 40 mass% or more with respect to the total mass of the surface side composite base material 3, respectively, The said wood flour becomes 5 mass%-30 mass% used as a small quantity rather than an inorganic filler. The compatibilizer may be about 1% by mass to 10% by mass. In addition, a predetermined amount of a colorant may be added and contained therein.
In this way, by making the content of the wood powder relatively small, it is difficult for the bottom surface portions 7a and 8a of the step portions 7 and 8 constituting the joint grooves 9 to be described later to be easily raised. The wiping property of the bottom part of the ground groove 9 can be improved.
Moreover, the surface hardness of the flooring 10 can be effectively increased by containing a relatively large amount of inorganic filler. Moreover, even when a large amount of inorganic filler is contained, by adding wood flour and a compatibilizing agent at the above ratio, the dispersibility and moldability are excellent, and the physical properties of the surface-side composite substrate 3 itself Is increased.

As said coloring agent, it is good also as a dye, a pigment, etc. which the said surface side composite base material 3 becomes the same color as the coating-film layer 6 mentioned later.
In this way, by adjusting the color tone of the surface-side composite base material 3 to the color tone of the coating film layer 6, the step bottom surface portions 7 a of the step portions 7 and 8 formed as described later on the surface-side composite base material 3. 8a, even when the coating film layer 6 is formed, the discontinuity of the color tone with the coating film layer 6 formed on the surface of the veneer 4 is not formed at that portion, and the design property is excellent. It will be a thing. That is, when a wood material is used as a base material as in the past, depending on the type, there are many cases where the color tone differs from the veneer such as black or white than the veneer. In this way, for each layered product with a different color tone between the base material and the veneer, each step is formed so as to reach the surface or layer of the base, and the surface of each step and the veneer is coated. In the case of forming a thin coating layer, in combination with the coating soaking in each step, the color tone of the coating layer formed on each step and the coating layer formed on the surface of the veneer Although it is conceivable that the color tone becomes discontinuous, according to the present embodiment, it is possible to effectively reduce the occurrence of such a problem as described above.
In order to make the texture of the veneer 4 more natural, for example, when the coating layer 6 is colorless and transparent, the colorant has a color tone of the surface-side composite base material 3, It is good also as a coloring agent which becomes the same color as the veneer 4.

In the present embodiment, the surface-side composite base material 3 is formed by extrusion molding so that the longitudinal direction of the flooring 10 and the extrusion direction of the surface-side composite base material 3 are in the same direction. Has been.
In addition, as a molding method of the surface-side composite base material 3, for example, a known biaxial kneader-extruder may be used for molding by extrusion molding that simultaneously performs kneading and extrusion. You may make it shape | mold by extrusion molding. Or you may make it shape | mold the surface side composite base material 3 by a calendar process.
In addition, the thickness of the surface-side composite base material 3 can be appropriately set according to the use / construction location of the plate-shaped building material, but is attached to the surface of the wooden base material 2 as in the present embodiment. In the case of being applied as a flooring 10, it may have a thin plate shape of about 0.5 mm to 10.0 mm, more preferably about 0.5 mm to 6.0 mm. This makes it relatively inexpensive while having a high surface hardness. In this embodiment, the thickness of the surface side composite base material 3 is about 0.6 mm.

The protruding plate 4 is a thin sheet formed by slicing natural fine wood to a thickness of about 100 μm to 1.0 mm. In this embodiment, the thickness of the protruding plate 2 is about 0.2 mm. It is said.
The paper material 5 interposed between the protruding plate 4 and the surface-side composite substrate 3 functions as a bonding layer for bonding the surface-side composite substrate 3 and the protruding plate 4 and has a basis weight of 10 to 80 g / in m ² approximately, are those of 100μm or less in thickness. By interposing such a paper material 5 between the projecting plate 4 and the surface-side composite base material 3, particularly when the wet projecting plate 4 is bonded by a hot press, it is generated from the emulsion adhesive or the projecting plate 4. Water vapor is removed through the paper material 5. Therefore, as in this embodiment, even when the base material to which the protruding plate 4 is attached is the surface-side composite substrate 3 that contains a thermoplastic resin and is difficult to escape, the protruding plate that may be generated by the expansion of the water vapor. It is possible to prevent punctures such as blistering and bursting.

As the coating material for forming the coating layer 6 formed on the surface of the protruding plate 4 and the surfaces of the stepped portions 7 and 8 (stepped bottom surface portion and stepped wall surface portion) to be described later, known coating materials can be used as appropriate. However, from the viewpoints of productivity, environment, etc., a solvent-free UV curable coating material may be used, and it may have a low gloss (matte finish) so as not to impair the texture of the veneer 4.
Moreover, the coating-film thickness of the coating-film layer 6 formed with the said coating material is good also as about 10 micrometers-100 micrometers.
Thereby, the water resistance, contamination resistance, etc. of the surface of the flooring 10 can be improved without impairing the aesthetics and texture of the grain inherent to the veneer 4. When the coating film thickness of the coating film layer 6 is less than 10 μm, the water resistance and the stain resistance tend to be reduced, and depending on the use conditions, the film tends to be easily peeled off. Moreover, when the coating film thickness of the coating film layer 6 exceeds 100 μm, a feeling of fleshiness comes out and the texture (wood texture) inherent to the veneer 4 tends to be impaired.

The stepped portions 7 and 8 are the surfaces of both side end portions (in the illustrated example, both side end portions along the longitudinal direction) of the laminate composed of the floor base material 1, the paper material 5, and the protruding plate 4 laminated as described above. The side edge is formed by cutting out by cutting or the like. That is, the step portions 7 and 8 formed along these longitudinal directions are formed along the same direction as the extrusion direction of the surface-side composite base material 3. In addition, you may make it provide the same step part also in the surface side edge part of the both-ends part along a transversal direction, respectively.
The stepped portions 7 and 8 have stepped bottom surface portions 7a and 8a that are substantially flat, and stepped wall surface portions 7b and 8b are inclined surfaces that are inclined from the surface of the protruding plate 4 toward both end portions, respectively. Has been. In other words, the angle formed by the stepped bottom surface portions 7a and 8a that are flat surfaces and the stepped wall surface portions 7b and 8b that are inclined surfaces is an obtuse angle.

In the present embodiment, the stepped portions 7 and 8 are formed such that the stepped bottom surface portions 7 a and 8 a reach the surface 3 a of the surface-side composite base material 3, respectively. That is, the surface 3a of the surface-side composite base material 3 constitutes the step bottom surface portions 7a and 8a. Thus, by making the surface 3a of the surface-side composite base material 3 constitute the step bottom surface portions 7a and 8a, for example, compared to the step formed on the base material made of a wood material, It is difficult for the stepped bottom surface portions 7a and 8a to stand up and the like, and the wiping property of the bottom portion of the joint groove 9 to be described later can be improved. That is, even when the thin coating layer 6 is formed, the step bottom surface portions 7a and 8a become smooth and the cleaning property is improved.
Furthermore, when the coating layer 6 is formed, the surface 3a of the surface-side composite base material 3 constitutes the step bottom surface portions 7a and 8a. For example, it is formed on a base material made of a wood material. Compared with the embodiment in which the coating layer is formed in the stepped portion, it is possible to reduce the case where the paint penetrates in the portion. Thereby, since the uniform coating-film layer 6 is formed also in each step part 7 and 8, while being able to improve water resistance, contamination resistance, etc., cleaning property can be improved.

As shown in FIG. 1B, the stepped portions 7 and 8 having the above-described configuration are formed when a plurality of flooring materials 10 are actually joined to the adjacent flooring material 10. A joint groove 9 formed between the side ends of the floor materials 10 is formed.
The step bottom surface portions 7 a, 8 a of the step portions 7, 8 constitute the bottom portions 7 a, 8 a of the joint groove 9, and the step wall surface portions 7 b, 8 b of the step portions 7, 8 are both side walls of the joint groove 9. The parts 7b and 8b are configured.
In the present embodiment, the joint groove 9 has the bottom portions 7a and 8a formed in a substantially flat shape by the stepped portions 7 and 8 having the above-described shape, and is formed as a continuous surface in a flush manner, and both side wall portions 7b. 8b has a shape that expands from the bottoms 7a, 8a, and a transverse cross section (a cross section in a direction perpendicular to the longitudinal direction of the joint groove 9 itself) has a substantially inverted isosceles trapezoidal shape.

The depth and width of the joint groove 9 can be appropriately set according to the thickness of the surface-side composite base material 3 on which the joint groove 9 is formed and the protruding plate 4, but the plate-shaped building material as in the present embodiment. When 10 is applied to the flooring, it may be about 0.2 mm to 2.0 mm. In the present embodiment, as described above, the surface 3a of the surface-side composite base material 3 constitutes the step bottom surface portions 7a and 8a, so that the depth of the joint groove 9 is the same as the thickness of the protruding plate 4. The depth is about 0.2 mm, and the width of the joint groove 9 is about 1.5 mm.
The step bottom surface portions 7a and 8a of the step portions 7 and 8 constituting the bottom portion of the joint groove 9 may be formed so as to reach the layer of the surface-side composite base material 3. In other words, the stepped portions 7 and 8 may be formed at such a depth that the stepped bottom surface portions 7 a and 8 a do not stop within the layer of the protruding plate 4 and reach the wood substrate 2.

Next, an example of the manufacturing method of the flooring 10 according to the present embodiment will be described with reference to FIGS.
First, as shown to Fig.2 (a), the surface side composite base material 3 is manufactured. In this example, mica (inorganic filler), wood powder and colorant are added to polypropylene (thermoplastic resin) and maleic acid-modified polypropylene (compatibility agent), and the thickness is 0.6 mm by a twin-screw kneading extruder. A forming plate is formed.
The blending ratio of each of the above materials may be, for example, 37% by mass of polypropylene, 3% by mass of maleic acid-modified polypropylene, 50% by mass of mica, and 10% by mass of 45 mesh wood flour. You may make it add a coloring agent. As described above, the colorant is preferably a color similar to that of the coating layer 6.

Next, as a surface treatment for improving the adhesiveness and wettability of the adhesive, the surface of the molded plate is subjected to corona discharge treatment, and a moisture curable urethane adhesive is applied to the paper material 5 having a thickness of 50 μm. Then, for example, the paper material 5 is adhered to the surface of the molding plate as shown in FIG. 2B by pressing with a roll laminator.
The molding plate on which the paper material 5 is adhered in this manner is cut into a predetermined size in accordance with the desired size of the flooring 10, and the surface side composite in which the paper material 5 is adhered to the surface 3a. A substrate 3 is formed.

Next, as shown in FIG. 2 (c), an aqueous vinyl urethane-based adhesive is applied to the surface of the wood substrate 2 such as plywood, and the surface-side composite substrate 3 is placed and cured at room temperature. The surface-side composite base material 3 is stuck to the surface of the wood base material 2.
Further, an emulsion adhesive such as a latex adhesive is applied to the paper material 5 adhered to the surface 3a of the surface-side composite base material 3, and the protruding plate 4 is placed on the paper material 5, It hardens | cures and sticks by a hot press, and forms a laminated body.
Next, as shown in FIG. 2 (d), actual joints 2a, 2b and fixed stoppers are formed on both side ends along the longitudinal direction and both side ends along the short direction of the laminate formed as described above. The step portions 7 and 8 are formed on the surface side edge portions at both side end portions along the longitudinal direction.

Next, on the surface of the laminate (the surface of the projecting plate 4 and the surface of the stepped portions 7 and 8) in which the stepped portions 7 and 8 are formed on the surface side edge portions at both end portions along the longitudinal direction as described above. Then, coating is performed by a roll coater to form a coating layer 6 as shown in FIG.
The coating layer 6 may be formed, for example, by overcoating as follows.
As an undercoat, a solvent-free UV-curable coating was applied with a sponge roll, then scraped with a metal reverse roll and applied with 2.5 g / scale ² , and further with a rubber roll, the coating was applied with 0.8 g / After applying the scale ^2, it is cured by irradiating with ultraviolet rays using a known ultraviolet light source.
In order to remove the uncured coating on the surface after the coating is cured and to effectively fix the intermediate coating to be described later, for example, with about 320 count abrasive paper (sandpaper) Surface treatment may be performed by sanding.

Next, as an intermediate coating, 1.0 g / scale ^{2 of} a solventless UV curable coating is applied with a rubber roll, and then cured by irradiating with UV rays, and the same surface treatment as described above is performed.
Further, as a top coat, a solvent-free matte UV-curable coating is applied with a rubber roll at 0.8 g / scale ² and, as above, irradiated with UV and cured.
In this example, the coating film thickness of the coating layer 6 formed by being overcoated in this way is about 50 μm.
The flooring 10 shown in FIG. 1A is manufactured through the above steps.
In addition, the order of the manufacturing process shown in the above example, the blending ratio of each material constituting the surface-side composite base material 3, the type of adhesive for joining each member, the coating method of the paint, etc. are examples. Other orders and other blending ratios may be used, and known adhesives and coating methods may be employed as appropriate for the type of adhesive, the coating method, and the like.

As shown in FIG. 1B, the flooring 10 having the above-described configuration is laid down on the floor base bs.
For example, an adhesive or the like is appropriately applied to the back surface of the floor material 10 on the left side of the paper, placed on the floor base bs, and fixed to the receiving portion by a fixing stop ns such as a nail. Next, the male real part 2a of the flooring 10 is fitted with the female real part 2b of the flooring 10 at the center of the paper, and the fixing stopper ns is driven into and fixed to the receiving part of the flooring 10 in the same manner as described above. Further, the female real part 2b of the flooring 10 on the right side of the paper is fitted into the male real part 2a of the flooring 10. In this way, the floor material 10 may be sequentially joined and applied to the floor base bs.
In the state constructed as described above, the step portions 7 and 8 are arranged so as to face each other between the side end portions of the adjacent floor materials 10, that is, on the surface of the joint portion. 8 forms the joint groove 9 as described above.

As described above, according to the flooring 10 according to the present embodiment, when the actual joining with the adjacent flooring 10 is performed, the stepped portions 7 and 8 of the flooring 10 are used to The bottom portions 7a and 8a of the joint groove 9 formed between the side end portions are substantially planar as described above and are flush with each other, and the both side wall portions 7b and 8b of the joint groove 9 are also formed. Is shaped to expand from the bottom 7a, 8a. Thereby, even if dust, dirt, etc. adhere to the joint groove 9 between the side end portions that are formed when they are actually joined to each other, it is easy to wipe off, and the cleanability can be improved.
Further, since the adjacent floor members 10 are configured so that the actual joint portions 2a and 2b are actually joined as described above, the displacement in the plate thickness direction is reduced, and the joint groove 9 The bottom portions 7a and 8a are not formed with a step or the like, and can be made to be a continuous surface.

Furthermore, in this embodiment, since the surface side composite base material 3 constituting the floor base material 1 is made of a wood powder / plastic composite material as described above, it is compared with that made of a wood material. Thus, expansion and contraction of the flooring 10 due to moisture absorption / release and temperature change are reduced, and the flooring 10 is less likely to undergo dimensional change after construction. Thereby, even when there is moisture absorption / release or temperature change after the construction, in the bottom portions 7a, 8a of the joint grooves 9 formed on the joint surface as described above, it is difficult for displacement or gaps to occur. The bottom portions 7a and 8a can be flush with each other as a continuous surface.
Moreover, the said surface side base material 3 is set as the structure containing 40 mass% or more inorganic filler and 5 mass%-30 mass% wood flour with respect to the total mass of the said surface side composite base material 3. FIG. Therefore, since a relatively large amount of the inorganic filler is contained, the surface hardness is increased and the crack resistance, scratch resistance, caster resistance, etc. are excellent.

  Furthermore, since each said step part 7 and 8 is formed so that the longitudinal direction may become the same direction as the extrusion direction of the said surface side base material 3, the tree | wood contained in this surface side composite base material 3 The orientation direction of the powder or the like is the same as the longitudinal direction of the stepped portions 7 and 8 for constituting the joint groove 9. Thereby, after sticking the protruding plate 4, when the stepped portions 7 and 8 are cut and formed so that the stepped bottom surface portions 7 a and 8 a reach the layer of the surface-side composite base material 3, for example, The exposure rate of the wood flour exposed on the surfaces of the stepped portions 7 and 8 is reduced as compared with the case where the wood powder is formed in the other direction (an oblique direction or an orthogonal direction). Accordingly, it is possible to more effectively reduce the fluttering at the respective stepped portions 7 and 8 formed on the surface-side composite base material 3, and to further improve the wiping property.

Next, another embodiment according to the present invention will be described with reference to the drawings.
3A to 3C schematically show the plate-shaped building material according to the second embodiment, where FIG. 3A corresponds to FIG. 2D, and FIG. The figure corresponding to 1 (a), (c) is a schematic longitudinal cross-sectional view which shows typically an example of the construction state of the plate-shaped building material.
The difference from the first embodiment is mainly the configuration of each step portion constituting the joint groove, and the same components are denoted by the same reference numerals, and the description thereof is omitted or briefly described. . The description of the manufacturing process and the joining process (construction process) similar to those in the first embodiment will be omitted or briefly described.

As shown in FIGS. 3A and 3B, the flooring 11 according to this embodiment forms the same laminate as described above, and then forms the actual joints 2a and 2b, the receiving portion 2c, and the like as described above. In addition, the stepped portions 17 and 18 are formed by cutting.
Each of the step portions 17 and 18 has a concave curved surface shape, and has a concave curved surface in which the step bottom surface portions 17a and 18a and the step wall surface portions 17b and 18b are continuous. In such an embodiment, the boundary between the step bottom surface portions 17a and 18a and the step wall surface portions 17b and 18b is not substantially formed. What is necessary is to grasp | ascertain as 18a and to grasp | ascertain the site | part close | similar to the surface side of the protrusion 4 relatively as the step wall surface parts 17b and 18b.
In the present embodiment, the stepped portions 17 and 18 are formed such that the stepped bottom surface portions 17a and 18a reach the layers of the surface-side composite base material 3, respectively. Even in such an aspect, as in the first embodiment, for example, compared to the case where a step portion is formed on a base material made of a wood material, the step bottom portions 17a and 18a are unlikely to be raised upright, The wipeability of the bottom part of the joint groove 19 to be described later can be improved.

As shown in FIG. 3C, each of the step portions 17 and 18 having the above-described configuration is obtained when a plurality of flooring materials 11 are actually joined to the adjacent flooring materials 11 as shown in FIG. In addition, joint grooves 19 formed between the side end portions of the floor materials 11 are formed.
In the present embodiment, the joint groove 19 has the bottom portions 17a and 18a formed into a concave curved surface shape by the stepped portions 17 and 18 having the above-described shape, and is formed into a continuous surface in a flush manner. 17b and 18b have a shape that expands from the bottom portions 17a and 18a, and a cross section thereof (a cross section in a direction perpendicular to the longitudinal direction of the joint groove 19 itself) has a concave curved shape.
According to the joint groove 19 configured as described above, since the entire surface of the joint groove 19 has a continuous concave curved surface shape, the joint groove 9 shown in the first embodiment, other obtuse angle portions, and the like are provided. The cleaning property is further improved as compared with the joint groove having the shape.

  In each of the above embodiments, the joint grooves 9 and 19 are exemplified as those having a substantially inverted isosceles trapezoidal shape or a concave curved shape in cross section. However, the joint groove has a substantially planar shape at the bottom or Any shape may be used as long as the curved surface is formed into a continuous surface that is flush with the both side walls, and has a shape that expands from the bottom. For example, the bottom portion of the joint groove 9 is replaced with the bottom portions 17a and 18a having a concave curved surface shape of the joint groove 19 instead of the bottom portions 7a and 8a having the substantially planar shape of the joint groove 9. Instead of the bottom portions 17a and 18a of the joint groove 19 having a concave curved surface shape, the bottom portions of the joint groove 19 may be bottom portions 7a and 8a of the joint groove 9 having a substantially planar shape. Alternatively, instead of the stepped wall surface portions 7b and 8b that are inclined surfaces in the shape of the both side walls of the joint groove 9, a curved surface in which a plurality of inclined surfaces are coupled so that the angle between each other becomes an obtuse angle. It is good also as a shape. Moreover, it is good also as what changed into the convex curved surface shape etc. instead of the shape of the bottom part made into the concave curved surface shape.

Moreover, in each said embodiment, the floor base material 1 was equipped with the wood base material 2 and the surface side composite base material 3 made from the wood powder and the plastic composite material laminated | stacked on the surface of this wood base material 2. Although it is set as a structure, it is not restricted to such a laminated structure, For example, you may make it comprise the floor base material 1 only by the wooden base material 2 or the surface side composite base material 3. FIG. Alternatively, instead of the surface-side composite base material 3 made of wood powder / plastic composite material, for example, a surface-side base material made of a woody material such as MDF is laminated on the surface of the woody base material 2 and the floor It is good also as an aspect which comprises a base material.
Furthermore, in each said embodiment, although the example which stuck the protrusion board 4 via the paper material 5 to the surface 3a of the surface side composite base material 3 is shown, the surface side composite base material is not interposed via the paper material 5. Alternatively, the protruding plate 4 may be attached directly to the surface 3a of the third plate 3a.

  Furthermore, in each of the above embodiments, the formation target of each stepped portion 7, 8, 17, 18 is a plate-like body configured by laminating the protruding plate 4 and the surface-side composite base material 3. It is good also as an aspect which forms each step part 7,8,17,18 in single plates, such as a decorative single plate, without using the laminated plate-shaped body. Alternatively, in place of the aspect in which the stepped portions 7, 8, 17, 18 are formed on the protruding plate 4 or the decorative veneer as described above, the stepped portions 7, 8, 17 and 18 are formed, and the coating layer 6 is formed, or the synthetic resin sheet is adhered to the entire surface including the stepped portion without forming the coating layer 6. Good.

Moreover, in each said embodiment, although the mode which actually joins the adjacent flooring materials 10 is shown as the example of the mode of this actual joining which fits the male real part 2a and the female real part 2b, Other embodiments may be adopted. For example, it is good also as an aspect etc. which form a groove-shaped employment tenon in the both-sides edge part of the flooring 10, respectively, insert an employment fruit in this employment tenon, and actually join. It is preferable that such an aspect of the actual joint portion is an aspect in which displacement in the thickness direction is difficult to occur when the adjacent floor materials 10 are actually joined to each other.
Further, in each of the above embodiments, the joint grooves 9 and 19 are formed on the joint surface when the flooring materials 10 are actually joined to each other. In addition, joint grooves whose cross sections are substantially the same shape as the joint grooves 9 and 19 may be provided at other portions of the surface of the laminate. Such joint grooves are generally provided from the viewpoints of design properties and for the purpose of absorbing a step or the like at a butt joint portion of a surface decorative material such as a veneer, but in general, V By forming such joint grooves as joint grooves 9 and 19 similar to those described above, design uniformity can be achieved, and cleaning performance at the joint groove portions can also be improved.

(A), (b) shows typically one Embodiment of the plate-shaped building material which concerns on this invention, (a) is a schematic longitudinal cross-sectional view of the plate-shaped building material, (b) is the plate It is a schematic longitudinal cross-sectional view which shows typically an example of the construction state of a shape building material. (A)-(d) is a schematic longitudinal cross-sectional view for demonstrating an example of the formation process of the same plate-shaped building material. (A)-(c) shows all other embodiments of the plate-shaped building material concerning the present invention, (a) is a figure corresponding to Drawing 2 (d), and (b), The figure corresponding to Fig.1 (a), (c) is a schematic longitudinal cross-sectional view which shows typically an example of the construction state of the plate-shaped building material.

Explanation of symbols

2a Male part (real joint)
2b Female real part (real joint)
3 Surface-side composite base material (base material)
3a Surface side composite substrate surface 4 Veneer (decorative material)
9, 19 Joint groove 7a, 8a, 17a, 18a Step bottom (bottom of joint groove)
7b, 8b, 17b, 18b Stepped wall surface (side wall of joint groove)
10,11 Floor material (plate-shaped building material)

Claims (6)

It is a plate-shaped building material provided with an actual joint at at least one side end,
When actual joining with the adjacent plate-shaped building materials is made mutually, it is configured that a joint groove is formed between the side end portions of these plate-shaped building materials,
The joint groove is a plate-shaped building material characterized in that the bottom portion has a substantially planar shape or a curved surface shape and is flush with a continuous surface, and both side wall portions are widened from the bottom portion. . In claim 1,
A base material made of a wood powder / plastic composite material and a decorative material adhered to the surface of the base material, the bottom of the joint groove reaching the surface or layer of the base material A plate-shaped building material characterized by In claim 2,
The said base material contains the inorganic filler of 40 mass% or more and the wood flour of 5 mass%-30 mass% with respect to the total mass of the said base material, The plate-shaped building material characterized by the above-mentioned. In claim 2 or 3,
The said base material is formed by extrusion molding so that an extrusion direction may become the same direction as the longitudinal direction of the said joint groove, The plate-shaped building material characterized by the above-mentioned. In any one of Claims 1 thru | or 4,
The joint groove has a substantially inverted isosceles trapezoidal shape in cross section. In any one of Claims 1 thru | or 4,
The joint groove is a plate-shaped building material having a concave curved cross section.

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