JP7101508B2 - Building board - Google Patents

Description

The present invention relates to a building board used for a flooring material, furniture, a shelf board, etc., and more particularly to a building board preferably used as a flooring material that can be used for footwear used in stores and the like.

Flooring materials that can be used in stores and the like are required to have a hard surface and scratch-resistant physical properties, and consolidation treatment is a technique for constructing such flooring materials with wood as the main material. Are known. The consolidation treatment is mainly performed on solid wood, and the target material is sandwiched between a pair of heating plates and heat-pressed from both sides for a long time, and steam treatment is performed to compress the whole substantially uniformly and increase the density. However, it increases the hardness and is known in Patent Document 1 and the like. The compacted wood does not return to its original shape even when it gets wet with water, and can maintain its shape forever.

Japanese Unexamined Patent Publication No. 2011-183631 Japanese Patent No. 5754836 (paragraph 0005)

As described in Patent Document 2, when wood having knots (solid wood) is compacted, 1) the knots cannot be compacted completely, so that the surface of the knots becomes swollen and does not become smooth. 2) Knots Cracks and cracks occur in the part 3) Resin content such as tar eluted from the knot part adheres to the hot plate of the flat plate press machine, and the compacted wood cannot be easily taken out from the hot plate 4) Knot part Will turn blackish brown and spoil the design feeling. 5) Problems such as denting the surface of the hot plate of the flat plate press machine when compacting will occur (quoted from the description in paragraph 0005), and the knots. It was considered that wood with knots is not suitable for compaction treatment because cracks occur in the fiber direction of the wood around the knots when the wood is buckled and crushed.

In view of the fact that high-quality hardwood veneer is depleted, the applicant has considered compacting plywood using softwood veneer (coniferous veneer). Since the softwood veneer has many nodes as is known, the present invention has been completed through repeated studies and experiments in order to obtain a softwood veneer that does not cause the above-mentioned problems or defects.

That is, the problem to be solved by the present invention can be suitably used for store floors, furniture, shelves, etc. by compacting a wooden laminated board (coniferous tree single board, etc.) formed by laminating boards having knots. It is to provide building boards.

In order to solve the above problems, the present invention according to claim 1 is a building board obtained by compacting a wooden laminated board formed by laminating a plurality of unit constituent boards having at least one knot, and the knots. Is a building board with a smooth surface, which remains as it is without being consolidated and deformed, but the knot-corresponding parts of one or more unit constituent boards adjacent above and / or below the knots are compressed and deformed into knots .

In the present invention according to claim 2, in the building board of claim 1, the unit constituent board is a single board or a sawn board of a coniferous tree, and the wood laminated board is any one of a coniferous plywood, a coniferous LVL, a coniferous laminated timber and a coniferous CLT. It is characterized by being one or any of these optional composite boards.

The present invention according to claim 3 is a surface plate in which the unit constituent plate having knots is located on the surface of the wood laminated plate in the building plate according to claim 1 or 2, and one or one located below the surface plate. It is characterized in that a plurality of unit constituent plates are compressed and deformed at the knot-corresponding portion of the surface plate, which is larger than the compressibility of the consolidation treatment.

According to the fourth aspect of the present invention, in the building board according to claim 1 or 2, the unit constituent board having knots is an intermediate board located in the middle of the wood laminated board, and is located above and below the intermediate board. It is characterized in that one or a plurality of unit constituent plates are compressed and deformed at a joint-corresponding portion of the intermediate plate, which is larger than the compression ratio of the consolidation process.

According to the present invention, a building board can be obtained by compaction processing a wooden laminated board formed by laminating a plurality of unit constituent boards having at least one knot. In the consolidated wood laminated board, the dense and hard knots are hardly compressed, but the knot-corresponding parts (directly above / directly below / near the knots) in one or more adjacent veneers above and / or below the knots are not compressed. It is compressed into knots and transformed. That is, the influence of the knots during the consolidation treatment can be absorbed by compressing the knot-corresponding portions of one or more veneers adjacent to the top and bottom of the knots to a greater compressibility than the compression rate in the consolidation treatment. Wood veneer and building boards do not impair flatness. As a result, a building board having high strength and excellent design can be obtained.

In addition, since there are other unit constituent plates adjacent to at least one of the upper and lower sides of the unit constituent plate having knots, the portion where the knots are not compressed should be supplemented by compression or deformation of the other unit constituent plates adjacent to the upper and lower sides. Can be done. Therefore, the consolidation treatment does not cause cracks or cracks in the knots and does not impair the practical value and commercial value. Further, since the knots are not forcibly compressed, the elution of the tar is suppressed and the amount of adhesion to the hot plate is reduced, so that the wood laminated board after the consolidation treatment can be easily taken out from the hot plate.

Furthermore, if the surface plate of the wood laminated board has knots, the knots of the surface board will appear on the surface of the building board even if a surface decorative layer such as paint is formed, so a unique design that emphasizes the wood texture. A building board having sex can be obtained. That is, according to the present invention described in Patent Document 2 described above, all the disadvantages and disadvantages described in the above-mentioned patent document 2 can be eliminated by compacting the wood laminated board into a building board.

It is a perspective view (a) which shows the softwood plywood before the consolidation treatment and the perspective view (b) which shows the softwood plywood after the consolidation treatment in one Embodiment of this invention. In this embodiment, a softwood veneer with knots is used as the surface veneer of the softwood veneer. FIG. 1 is a cross-sectional view (a) of a knotted portion of the softwood plywood before consolidation and a cross-sectional view (b) of the same portion of the softwood plywood after consolidation in FIG. It is sectional drawing (a) of the knot part of the softwood plywood before consolidation treatment and the sectional view (b) of the same part of the softwood plywood after consolidation treatment in another embodiment of this invention. In this embodiment, the knotted softwood veneer is used as an intermediate veneer of the softwood veneer. It is sectional drawing (a) of the knot part of the softwood plywood before consolidation treatment and the sectional view (b) of the part of the coniferous plywood after consolidation treatment in still another embodiment of this invention. In this embodiment, the knotted softwood veneer is used as the front veneer, intermediate veneer and back veneer of the softwood veneer.

A building board according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. The building board 10 is a 9-ply softwood plywood 11'(FIG. 1 (a), FIG. 2 (a)) in which nine softwood veneers are laminated with their fiber directions alternately orthogonal to each other (for example, Patent Document 1). The surface decorative layer 12 is formed by painting or the like on the surface of the 9-ply softwood plywood 11 obtained by the compaction treatment (described in paragraphs 0063 to 0077) (FIGS. 1 (b) and 2 (b)).

That is, the building board 10 is a compaction obtained by compacting a 9-ply plywood 11'(for example, a thickness of 24 mm or 28 mm, a plane dimension of 910 mm × 1820 mm) composed of nine hinoki veneers to a thickness of about half. The plywood 11 is subjected to surface cutting and actual processing, and a surface decorative layer 12 is formed by painting to form a building board 10 to be used as a floor material. Many coniferous veneers such as cypress have knots, and in this embodiment, the surface veneer 11a has knots 13.

As schematically shown in FIG. 2, when the softwood plywood 11'before the consolidation treatment is consolidated between the upper and lower heating plates by a conventional method, each veneer 11a to 11i is about half the thickness in the portion without the knot 13. However, since the high-density and hard knot 13 portion of the surface veneer 11a is hardly compressed, the portion directly below the knot of one or more veneers adjacent to the surface is compressed into the knot 13 and deformed. do.

In the illustrated example, the two veneers 11b and 11c adjacent to the lower side of the surface veneer 11a are greatly deformed due to the compression by the node 13 directly under and in the vicinity of the node 13, but the compression by the node 13 The number of veneers that are deformed in response to the veneer and the degree of deformation vary depending on the size and position of the nodes 13 of the surface veneer 11a, the compression rate in the consolidation process, and the like.

In the building board 10 according to the embodiment shown in FIG. 3, a 9-ply softwood plywood 11'(FIG. 3 (a)) in which nine softwood veneers including an intermediate veneer 11e having a node 13 are laminated with their fiber directions alternately orthogonal to each other. )) Is compacted to form a surface decorative layer 12 on the surface of the 9-ply softwood plywood 11 by painting or the like (FIG. 3 (b)). That is, in the veneer 10 according to the embodiment shown in FIGS. 1 and 2, the veneer having the knots 13 is the surface veneer 11a, whereas in the veneer 10 according to this embodiment, the veneer having the knots 13 is. It differs in that it is an intermediate veneer 11e.

When the softwood plywood 11'before the consolidation treatment according to this embodiment is compacted between the upper and lower heating plates by a conventional method, each veneer 11a to 11i is compressed to about half the thickness in the portion without the knot 13, but in the middle. Since the high-density and hard knot 13 portion of the veneer 11e is hardly compressed, the upper and lower adjacent knot upper and lower portions of the veneer 11e are compressed and deformed by the knot 13.

In the illustrated example, one veneer 11d and 11f adjacent to the upper and lower parts of the intermediate veneer 11e are greatly deformed by the compression by the node 13 directly above / below the node 13 and in the vicinity thereof. However, the number of veneers that are deformed by being compressed by the node 13 and the degree of deformation vary depending on the size and position of the veneer 13 of the intermediate veneer 11e, the compression rate in the consolidation process, and the like.

Although not shown because it is clear from the above, even when the other intermediate veneers 11b to 11d and 11f to 11h have knots 13, the portion directly above the knots of one or more veneers adjacent above and below the knots 13 and The portion directly below is compressed into the node 13 and deformed.

In the building board 10 according to the embodiment shown in FIG. 4, nine softwood veneers including a front surface veneer 11a, an intermediate veneer 11e, and a back surface veneer 11i having knots 13 are laminated with their fiber directions alternately orthogonal to each other. A surface decorative layer 12 is formed on the surface of the 9-ply softwood veneer 11 obtained by compacting the ply softwood veneer 11'(FIG. 4 (a)) by painting or the like (FIG. 4 (b)). That is, in the veneer 10 according to the embodiment shown in FIGS. 1 and 2, the veneer having the knots 13 is the surface veneer 11a, and in the veneer 10 according to the embodiment shown in FIG. 3, the veneer having the knots 13 is a single veneer. Whereas the veneer is an intermediate veneer 11e, the building veneer 10 according to this embodiment is different in that the veneer having the knots 13 is a front veneer 11a, an intermediate veneer 11e, and a back surface veneer 11i.

When the consolidated plywood 11'before the consolidation treatment according to this embodiment is compacted between the upper and lower heating plates by a conventional method, each veneer 11a to 11i is compressed to about half the thickness in the portion without the knot 13, but the surface is compressed. Since the high-density and hard knot 13 portions of the veneer 11a, the intermediate veneer 11e, and the back surface veneer 11i are hardly compressed, the portions directly above and below the veneer of one or more adjacent veneers above and below the veneer are not compressed. It is compressed into node 13 and deformed.

In the illustrated example, since the nodes 13 of the front surface veneer 11a, the intermediate veneer 11e, and the back surface veneer 11i are located overlapping in the thickness direction, the intermediate veneers 11b to 11d, 11f to be located between these veneers. 11h is greatly deformed directly above / below the node 13 and in the vicinity thereof due to the compression by the node 13, but the number of veneers and the degree of deformation that are deformed by the compression by the node 13 are these. It depends on the size and position of the node 13 of the veneer, the compression rate in the consolidation process, and the like.

Although some examples of the embodiment of the present invention have been described above with reference to the drawings, factors such as the position and number of veneers having knots 13 in the softwood plywood 11'and the positional relationship between the knots 13 in the thickness direction are factors. Therefore, the state and degree of deformation of each veneer in the softwood plywood 11 obtained by the compaction treatment are also different. However, as in the embodiment shown in FIG. 4, it is rare that the knots 13 of a plurality of veneers completely overlap each other in the thickness direction. Since one or more (no knotless) veneers adjacent to the veneer absorb by compressing more than the compressibility in the consolidation treatment, a softwood plywood 11 having smooth front and back surfaces is obtained.

That is, as described above with reference to Patent Document 2, when the solid wood having knots is compacted, the knots are not compressed and the surface smoothness is impaired. However, the softwood veneer 11a to According to the present invention in which a plurality of 11i laminated coniferous plywood 11'is compacted, the influence of the node 13 not being compressed is absorbed by the veneer adjacent to the top and bottom of the node 13 being compressed or deformed, so that the surface is absorbed. Smoothness is not impaired. Therefore, the surface of the hot plate of the flat plate press is not dented.

In addition, the amount of uncompressed knots can be compensated for by compression or deformation of the single plates adjacent to the top and bottom of the knots, and since the knots are not forcibly compressed, cracks and cracks do not occur in the knots due to consolidation processing. Since the elution of the tar is suppressed and the amount of adhesion to the hot plate is reduced, the wood laminated board 11 after the consolidation treatment can be easily taken out from the hot plate. Further, when the surface veneer 11a has knots 13, even if the surface decorative layer 12 such as paint is formed, the knots 13 of the surface veneer 11a appear on the surface of the building board 10, so that the wood texture is emphasized. Appearance is obtained. That is, all the disadvantages and disadvantages described in Patent Document 2 described above can be eliminated by the present invention in which the softwood plywood 11'is compacted.

The effects described above are not limited to plywood in which a plurality of single plates are laminated with the fiber directions orthogonal to each other, but LVL (single plate lamination) in which a plurality of single plates are laminated with the fiber directions parallel to each other. Lumber), CLT (Cross Laminated Timber), which is made by laminating multiple sawn boards at orthogonal fiber directions, or laminated lumber made by laminating multiple sawn boards with parallel fiber directions. The same can be achieved when a wood laminated board made by laminating a plurality of unit constituent boards (single board or ground board) such as an arbitrary composite board is compacted. That is, the present invention is applicable to a wood laminated board in which at least one unit constituent board has knots.

10 Architectural board 11 Softwood plywood (wooden laminated board) 11a-11i Softwood veneer (unit composition board) 12 Surface decorative layer 13 sections

Claims (4)

It is a building board obtained by compaction processing of a wooden laminated board made by laminating a plurality of unit constituent boards having at least one knot, and the knots remain as they are without compression deformation, but above and / or below the knots. A building board with a smooth surface formed by compressing and deforming the knot-corresponding parts of one or more adjacent unit constituent boards into knots . The building board according to claim 1, wherein the unit constituent board is a softwood single board or a sawn board, and the wood laminated board is any one of softwood plywood, softwood LVL, softwood laminated timber and softwood CLT, or any composite board thereof. .. The unit constituent board having knots is a surface plate located on the surface of the wood laminated board, and one or more unit constituent boards located below the surface plate are the compression ratios of the consolidation treatment at the knot-corresponding portion of the surface plate. The building board according to claim 1 or 2, which is largely compressed and deformed. The unit constituent board having knots is an intermediate plate located in the middle of the wood laminated board, and one or more unit constituent boards located above and below the intermediate plate are compacted in the knot-corresponding portion of the intermediate plate. The building board according to claim 1 or 2, which is compressed and deformed to be larger than the rate.

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