JP4103545B2 - Flooring - Google Patents

Description

【００２７】
【発明の効果】
上記のように本発明の請求項１記載の発明にあっては、床材用基材の表面に突板を貼着して形成される床材において、床材用基材は５枚又は７枚の単板を繊維方向を交互に変えて積層してなる合板により構成され、床材用基材の上下両面の単板とセンターの単板とをそれぞれ広葉樹の単板とすると共に、上下両面及びセンターの単板以外の単板を針葉樹の単板とし、且つ前記突板が表面に貼着される上から一層目の単板の繊維方向を床材用基材の長手方向と交差する方向としてあるので、床材用基材は、針葉樹の単板をベースとした合板でありながら、上面の単板により表面の耐キャスター・耐凹み性が向上し、また、表面において針葉樹に特有な節、早材、晩材による表面の凸凹がなくて表面平滑性が向上し、更に、上下両面の単板１とセンターの単板１とをそれぞれ広葉樹の単板とすることで、反り、ねじれを防止し、寸法変化を小さくでき、撓み強度の確保ができ、しかも、針葉樹の単板をベースとしているので、防虫性に優れ、また、広葉樹の単板の使用量を少なくでき、これらの理由により現在資源として使用可能な針葉樹の単板をベースとしながら針葉樹の単板の良さを残しながら針葉樹の単板の欠点を広葉樹の単板を適切な層構成で積層することで解消することができる。
【００２８】
また、請求項２記載の発明にあっては、上記請求項１記載の発明の効果に加えて、広葉樹の単板の比重を０．４〜０．８５としてあるので、表面の耐キャスター・耐凹み性がよりいっそう向上し、また、たわみ強度などの諸強度が向上するものである。
【図面の簡単な説明】
【図１】本発明の一実施形態の断面図である。
【図２】同上の他の実施形態の断面図である。
【符号の説明】
１ 単板
１ａ 広葉樹の単板
１ｂ 針葉樹の単板
２ 建築板[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flooring .
[0002]
[Prior art]
Conventionally, it is a common practice to form a broad-leaved tree plywood with a 5-ply or 7-ply configuration of a single plate of southern ocean like Lawan, which is a broad-leaved tree.
[0003]
However, there is a problem that hardwood plywood is inferior in insect repellency. In addition, Lawan, the raw material for hardwood plywood, has been decreasing rapidly due to overcutting. It is said that the rainforest has reduced the rainforest due to the rough cutting of Lauan, and now it is said that the raw wood for plywood other than Lauan is used to protect the resources of Lauan wood and protect the global environment. It is urgently required to ask.
[0004]
Therefore, it is necessary to select tree species that can be continuously recycled from the viewpoints of resource protection and global environment protection. As the recyclable tree species, tree species regenerated by afforestation are desirable, and the coniferous tree species are mainly coniferous trees, and coniferous trees are not harvested as much as Lauan and can be used as resources.
[0005]
Therefore, plywood is formed by laminating a single sheet of coniferous wood such as radiata pine as a plywood for floors such as flooring.
[0006]
In addition, a proposal has been made that a single plate of hardwood and a single plate of coniferous wood, which are single plates of southern sea wood, may be combined. (For example, see Patent Document 1)
[0007]
[Patent Document 1]
JP 10-264104 A (paragraph number [0008])
[0008]
[Problems to be solved by the invention]
By the way, softwood plywood formed by laminating coniferous veneers has excellent insect repellent properties, but has low bending strength, large dimensional change (due to water), low caster / dent resistance, nodal, fast There is a problem that there is no surface smoothness due to the material and the late material (high surface irregularity), warping and twisting are large. For this reason, a fiber board such as MDF is used on the softwood plywood as a flooring material for construction. There is a problem that it is necessary to laminate and bond.
[0009]
Further, in Patent Document 1, there is only a description that “a single board of broad-leaved wood and a single board of coniferous wood, which are single boards of southern sea wood, may be combined”, and a specific layer configuration is not disclosed. However, no disclosure has been made as to what kind of structure is used to solve the above-mentioned problems of the single veneer veneer.
[0010]
The present invention has been made in view of the above points, and it is based on a softwood veneer that can be used as a resource at the present time. It is an object of the present invention to provide a flooring that can be eliminated by laminating with an appropriate layer structure.
[0011]
[Means for Solving the Problems]
In order to solve the above problems, a flooring according to the present invention is a flooring formed by sticking a veneer on the surface of a flooring base material. The base material for flooring is a single plate of 5 or 7 sheets. 1 is composed of laminated plywood with the fiber direction alternately changed, and the veneer 1 and upper and lower veneers 1 and 1 of the flooring base material are each made of hardwood veneer 1a, and upper and lower surfaces. And the single plate 1 other than the single plate 2 of the center is a single plate 1b of softwood , and the fiber direction of the first single plate 1a from the top where the protruding plate is attached to the surface is the longitudinal direction of the base material for flooring The crossing direction is a feature. With such a configuration, the flooring base material is a plywood based on a softwood veneer 1b, but the upper veneer improves the caster / dent resistance of the surface, and the surface Smoothness is improved, and furthermore, the single veneer 1 on both the upper and lower sides and the veneer veneer 1 are made of hardwood veneer 1a, respectively, thereby preventing warping and twisting, reducing dimensional changes, and ensuring flexural strength. It is something that can be done. In addition, since it is based on the single wood 1b of the coniferous tree, it is excellent in insect repellent, and the amount of the single wood 1a of the hardwood can be reduced.
[0012]
Moreover, it is preferable that the specific gravity of the single board 1a of hardwood is 0.4-0.85 . By adopting such a configuration, the caster / dent resistance of the surface is further improved.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.
[0014]
The building board 2 of the present invention is composed of a plywood compounded with a coniferous veneer 1b and a hardwood veneer 1a. That is, it is a plywood in which a softwood veneer 1b is used as a base and a hardwood veneer 1a is combined therewith.
[0015]
FIG. 1 shows an example of a building board of the present invention. In this embodiment, an example of a 7-ply plywood in which seven single boards 1 are laminated and integrated is shown. In FIG. 1, the single plate 1 on both the upper and lower surfaces and the single plate 1 on the center (the single plate 1 in the fourth layer from the top) are the hardwood single plates 1a such as Lauan and Kabor, respectively. Single board 1 other than 1 (second board from the top, third board from the top, fifth board from the top, and sixth board from the top) is a single board 1b of coniferous trees such as radiata pine and larch. ing.
[0016]
Here, as the veneer veneer 1a used as the upper and lower veneers 1 and the center veneer 1, one having a specific gravity of 0.4 to 0.85 , preferably having a high specific gravity of 0.75 or more is used. .
[0017]
The thickness of the single plate 1 constituting each layer of the 7-ply plywood is, for example, in order from the top: first layer = 1.0 mm, second layer = 2.1 mm, third layer = 1.7 mm, four layers Eye = 2.4 mm, 5th layer = 1.7 mm, 6th layer = 2.1 mm, 7th layer = 1.0 mm, and the total thickness of the plywood constituting the building board 2 is 12 mm.
[0018]
Further, the single plates 1 adjacent to each other are stacked so that the fiber directions are alternately different. In the embodiment shown in FIG. 1, if the arrow A direction is the long direction of the plywood, it is a face single plate. The first layer of hardwood veneer 1a from the top is in the direction where the fiber direction intersects the arrow A which is the long direction of the plywood, and the second layer of softwood veneer 1b from the top is the fiber direction where the fiber direction is the length of the plywood It is a direction parallel to the arrow A which is the scale direction, and the single layer 1b of the conifer of the third layer from the top is the direction where the fiber direction intersects the arrow A which is the long direction of the plywood, and the center unit of the fourth layer from the top The hardwood veneer 1a is a direction in which the fiber direction is parallel to the arrow A, which is the long direction of the plywood, and the softwood veneer 1b of the fifth layer from the top is an arrow whose fiber direction is the long direction of the plywood Crossing A, the 6th layer of softwood veneer 1b is fiber Is a direction parallel to the arrow A which is the long direction of the plywood, and the back single plate which is the single board 1a of the hardwood in the seventh layer from the top is a direction in which the fiber direction intersects the arrow A which is the long direction of the plywood It has become. By laminating in this way, the crack resistance performance is improved. In this embodiment, the direction in which the fiber direction of the veneer veneer 1a on both the upper and lower surfaces of the plywood formed by compositely laminating the softwood plywood 1b and the hardwood plywood 1a intersects the arrow A which is the long direction of the plywood. Thus, since the fiber direction of the veneer 1a of the hardwood at the center is a direction parallel to the arrow A which is the long direction of the plywood, the effect of suppressing the dimensional change and the effect of preventing the twist can be enhanced.
[0019]
FIG. 2 shows another embodiment of the present invention. This embodiment shows an example of a 5-ply plywood in which five single plates 1 are laminated and integrated. In FIG. 2, the single plate 1 on both the upper and lower surfaces and the single plate 1 on the center (the single plate 1 in the third layer from the top) are hardwood single plates 1a. 1 (the single plate 1 of the second layer from the top and the fourth layer from the top) is a single plate 1b of the conifer.
[0020]
Also in this embodiment, the hardwood veneer 1a used as the upper and lower veneers 1 and the center veneer 1 has a specific gravity of 0.4 to 0.85 , preferably a high specific gravity of 0.75 or more. Is used.
[0021]
Further, also in this embodiment, the single plates 1 adjacent to each other in the vertical direction are laminated so that the fiber directions are alternately different, and in the embodiment shown in FIG. 2, when the arrow A direction is the long direction of the plywood, The single-layer hardwood veneer 1a from the top, which is a face veneer, has a direction in which the fiber direction intersects the arrow A, which is the long direction of the plywood, and the second-layer softwood veneer 1b from the top The direction is parallel to the arrow A, which is the long direction of the plywood, and the hardwood veneer 1a which is the third center single plate from the top is the direction where the fiber direction intersects with the arrow A, which is the long direction of the plywood The fourth layer of coniferous veneer 1b from the top is in the direction parallel to the arrow A, which is the long direction of the plywood, and the back veneer, which is the fifth layer of hardwood veneer 1a, is fiber. The direction is the direction intersecting with the arrow A which is the long direction of the plywood . By laminating in this way, the crack resistance performance is improved.
[0022]
By the way, in any of the above-described embodiments, since the coniferous veneer 1b and the broadleaf veneer 1a are combined, the coniferous tree formed from the coniferous raw material that can be more easily used as a wood resource for the global environment. The veneer 1b can be used as a base, so that the amount of hardwood veneer 1a used can be reduced. In addition, the upper veneer that is a face veneer is a plywood based on the veneer veneer 1b. Since 1 is a hardwood veneer 1a, the face veneer is more resistant to casters and dents than the softwood veneer 1b, and the surface smoothness is improved. In addition, since the single veneer 1 on both the upper and lower sides and the single veneer 1 at the center are each a single veneer 1a of hardwood, warping and twisting that occur in a plywood laminated only with the veneer veneer 1b are prevented, and the dimensional change is reduced. It is possible to ensure the bending strength. Moreover, since it is based on the single board 1b of a conifer, it is excellent in insect repellent.
[0023]
Building board 2 of the present invention having the above configuration is used as a substrate for flooring, and forms a flooring by attaching the projecting plate to the surface.
[0024]
【Example】
A plywood is pasted on the surface of a 12 mm thick building board 2 made of 7-ply plywood shown in FIG. 1 of the present invention (Lawan is used as a hardwood veneer 1a and larch is used as a softwood veneer 1b). In the case of Comparative Example 1 and 5 ply, an example was obtained by attaching a veneer on the surface of a 12 mm thick building board made of 7 ply softwood plywood (laminated laches veneer on 7 ply). As Comparative Example 2, these examples were obtained by attaching a veneer on the surface of a 12 mm thick building board in which a 2.4 mm thick MDF was laminated on the surface of a softwood plywood (laminated with 5 plies of larch) When the deflection strength, caster resistance, warpage variation, dimensional change (drying, humidification), and surface state in Comparative Example 1 and Comparative Example 2 were compared, the results shown in Table 1 below were obtained.
[0025]
In addition, the bending strength was measured based on JIS A 5908. Moreover, the caster resistance measured the amount of dents by making the caster which applied load reciprocated 1000 floors. The amount of change in warpage was measured after a 1 x 6 scale size was manufactured and then naturally cooled. Moreover, the dimensional change (drying) measured the dimensional difference of the sample of 1 size x 6 scale size, after putting the sample of 1 size x 6 scale size in a chamber, heating to 60 degreeC, and leaving to stand for one week. In addition, the dimensional change (humidification) is the difference in size of a 1 x 6 scale sample after a 1 x 6 scale sample is placed in a chamber and left in an atmosphere of 40 ° C and humidity of 90 ° C for a week. It was measured.
[0026]
[Table 1]

[0027]
【The invention's effect】
As described above, in the invention according to claim 1 of the present invention, in the floor material formed by sticking the veneer on the surface of the floor material, the floor material has 5 or 7 substrates. Are made of plywood that is laminated by alternately changing the fiber direction, and the single and double-sided veneers and the center veneer of the base material for flooring are each made of hardwood, and A single plate other than the single plate of the center is a single plate of conifers , and the fiber direction of the first single plate from the top where the protruding plate is attached to the surface is the direction intersecting the longitudinal direction of the base material for flooring Therefore, the base material for flooring is a plywood based on a single veneer of a coniferous tree, but the upper single veneer improves the resistance to casters and dents on the surface. The surface smoothness is improved because there is no unevenness of the surface due to the material and the late material. The hardwood veneers 1 and 2 are made of hardwood veneer, preventing warping and twisting, reducing dimensional changes, ensuring flexural strength, and being based on softwood veneer. It is excellent in quality and can reduce the amount of hardwood veneer. For these reasons, it is based on the softwood veneer that can be used as a current resource. Can be solved by laminating a single sheet of hardwood with an appropriate layer structure.
[0028]
In addition, in the invention described in claim 2, in addition to the effect of the invention described in claim 1, the specific gravity of the single board of hardwood is set to 0.4 to 0.85. The dent property is further improved, and various strengths such as deflection strength are improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of one embodiment of the present invention.
FIG. 2 is a cross-sectional view of another embodiment of the above.
[Explanation of symbols]
1 veneer 1a hardwood veneer 1b softwood veneer 2 building veneer

Claims (2)

In a flooring material formed by sticking a veneer on the surface of a base material for flooring, the base material for flooring is composed of plywood formed by laminating five or seven single plates by alternately changing the fiber direction. In addition, both the upper and lower single plates and the center single plate of the base material for flooring are each a hardwood single plate, and a single plate other than the upper and lower double plates and the center single plate is a softwood single plate , And the flooring characterized by making the fiber direction of the single board of the 1st layer from the top where the said veneer is stuck on the surface intersect with the longitudinal direction of the base material for flooring.   2. The flooring material according to claim 1, wherein the specific gravity of the hardwood veneer is 0.4 to 0.85.

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