JP2017125390A - Floor material - Google Patents

Floor material Download PDF

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JP2017125390A
JP2017125390A JP2016145867A JP2016145867A JP2017125390A JP 2017125390 A JP2017125390 A JP 2017125390A JP 2016145867 A JP2016145867 A JP 2016145867A JP 2016145867 A JP2016145867 A JP 2016145867A JP 2017125390 A JP2017125390 A JP 2017125390A
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layer
single plate
floor
thickness
flooring
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JP6872737B2 (en
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健一郎 柴田
Kenichiro Shibata
健一郎 柴田
鈴木 伸一
Shinichi Suzuki
伸一 鈴木
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Panasonic Intellectual Property Management Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a floor material which can suppress generation of steps and looseness, and which can also suppress warp.SOLUTION: A floor material 1 has a surface decorative layer 20 on the surface side of a plywood base material layer 10. The surface decorative layer includes a moisture-proof layer 22. The plywood base material layer has a structure in which an odd number of pieces of single plates are laminated comprising odd-numbered layer single plates 11, 13, 15 whose fiber direction is along the floor material lengthwise direction, and even-numbered layer single plates 12, 14 whose fiber direction is along the floor material width direction, and a plurality of grooves 18 which open on the rear surface side are provided, and these grooves are provided with intervals in the lengthwise direction and in such a manner that the groove bottoms are located in the layer of the second single plate from the surface side, so that portions having an interval in the floor material lengthwise direction of the floor material can relatively displace in the floor material thickness direction following the step of floor underlayer. On the rear surface of the plywood base material layer, a rear surface sheet 23 which can follow the displacement in the floor material thickness direction and which can suppress moisture absorption from the rear surface side to the plywood base material layer is attached so as to block a rear surface side opening of the grooves.SELECTED DRAWING: Figure 1

Description

本発明は、床材に関する。   The present invention relates to a flooring.

従来より、複数枚の単板を積層した合板を基材とする木質系の床材が知られている。このような床材は、比較的に剛性があるため、段差等が形成され易いフリーアクセスフロア(OAフロア)等の床下地(二重床下地)上に施工した場合には、段差やがたつきが生じ易くなるという問題があった。
例えば、下記特許文献1には、合板基材層の表面側に化粧層を設け、裏面側に遮音層を設けた木質系床材が開示されている。また、この木質系床材は、合板基材層の裏面側に、床材幅方向に延び、かつ裏面側に開放する裏溝を、その上端が上から2層目の単板の層内に位置するように床材長さ方向に間隔をおいて複数形成した構成とされている。
2. Description of the Related Art Conventionally, a wooden floor material using a plywood laminated with a plurality of single plates as a base material is known. Since such a flooring material is relatively rigid, when it is constructed on a floor base (double floor base) such as a free access floor (OA floor) where a step or the like is likely to be formed, the step or rattle There has been a problem that stickiness tends to occur.
For example, Patent Document 1 below discloses a wood-based flooring in which a decorative layer is provided on the front side of a plywood base material layer and a sound insulating layer is provided on the back side. In addition, this wood-based flooring has a back groove extending in the width direction of the flooring on the back surface side of the plywood base material layer and opened to the back surface side, and the upper end thereof is in the layer of the single plate from the top. It is set as the structure formed in multiple numbers at intervals in the flooring length direction so that it may be located.

特開2014−1615号公報JP 2014-1615 A

しかしながら、上記特許文献1に記載された木質系床材は、上記のように比較的に深い裏溝が形成された構成とされているので、湿度変化や日光に晒されるなどの環境変化によって反りが生じ易くなることが考えられた。   However, the wood-based flooring described in Patent Document 1 has a structure in which a relatively deep back groove is formed as described above, and therefore warps due to environmental changes such as humidity changes and exposure to sunlight. It was thought that this was likely to occur.

本発明は、上記実情に鑑みてなされたものであり、段差やがたつきの発生を抑制可能でありながらも、反りを抑制し得る床材を提供することを目的としている。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a flooring material capable of suppressing warpage while suppressing the occurrence of steps and rattling.

上記目的を達成するために、本発明に係る床材は、一方向に長尺状とされ、合板基材層の表面側に表面化粧層を設けた床材であって、前記表面化粧層は、防湿層を含んだ構成とされており、前記合板基材層は、床材長手方向に繊維方向を沿わせた奇数層の単板と床材幅方向に繊維方向を沿わせた偶数層の単板とからなる3枚以上で奇数枚の単板を積層した構成とされ、かつ、床材幅方向の全体に亘って延びるように裏面側において開口する複数本の溝が設けられた構成とされ、これら複数本の溝は、これら複数本の溝によって床材長手方向に区分される当該床材の床材長手方向に間隔を空けた部位同士が床下地の段差に追従して床材厚さ方向に相対的に変位可能なように、床材長手方向に間隔を空けて、かつ溝底が表面側から二枚目の単板の層内に位置するように設けられており、前記合板基材層の裏面には、前記床材厚さ方向への変位に追従可能で、かつ前記合板基材層への裏面側からの吸湿を抑制し得る裏面シートが前記複数本の溝の裏面側開口を塞ぐように貼着されていることを特徴とする。   In order to achieve the above object, a flooring according to the present invention is a flooring that is elongated in one direction and is provided with a surface decorative layer on the surface side of a plywood base material layer, the surface decorative layer being The plywood substrate layer is composed of an odd-numbered veneer with the fiber direction in the floor material longitudinal direction and an even layer with the fiber direction in the floor material width direction. A configuration in which an odd number of three or more single plates are laminated, and a plurality of grooves that are open on the back surface side so as to extend over the entire width of the flooring; and The plurality of grooves are separated from each other in the floor material longitudinal direction of the floor material by the plurality of grooves. The second veneer of the second sheet from the surface side is spaced apart in the longitudinal direction of the flooring so that it can be displaced relatively in the vertical direction. It is provided so as to be located inside, and the back surface of the plywood substrate layer can follow the displacement in the floor material thickness direction, and suppresses moisture absorption from the back surface side to the plywood substrate layer. The back sheet which can do is stuck so that the back side opening of the said several groove | channel may be plugged up.

また、上記目的を達成するために、本発明に係る床材は、一方向に長尺状とされ、合板基材層の表面側に表面化粧層を設けた床材であって、前記表面化粧層は、防湿層を含んだ構成とされており、前記合板基材層は、床材長手方向に繊維方向を沿わせた奇数層の単板と床材幅方向に繊維方向を沿わせた偶数層の単板とからなる3枚以上で奇数枚の単板を積層した構成とされ、かつ、床材幅方向の全体に亘って延びるように裏面側において開口する複数本の溝が設けられた構成とされ、これら複数本の溝は、これら複数本の溝によって床材長手方向に区分される当該床材の床材長手方向に間隔を空けた部位同士が床下地の段差に追従して床材厚さ方向に相対的に変位可能なように、床材長手方向に間隔を空けて、かつ溝底が表面側から二枚目の単板の層内に位置するように設けられており、前記合板基材層の裏面には、前記床材厚さ方向への変位に追従可能で、かつ前記複数本の溝の裏面側開口を拡開させる側への前記合板基材層の反りを拘束するように抑制し得る裏面層が設けられていることを特徴とする。   In order to achieve the above object, the flooring according to the present invention is a flooring that is elongated in one direction and is provided with a surface decorative layer on the surface side of the plywood base material layer. The layer is configured to include a moisture-proof layer, and the plywood base material layer includes an odd-numbered single plate having a fiber direction in the floor material longitudinal direction and an even number having a fiber direction in the floor material width direction. It is configured to have a stack of three or more single sheets of odd-numbered single sheets, and a plurality of grooves that are open on the back surface side so as to extend over the entire width of the flooring. The plurality of grooves are configured such that the portions spaced apart in the floor material longitudinal direction of the floor material divided by the plurality of grooves in the floor material longitudinal direction follow the steps of the floor base. The second floor from the surface side is spaced apart in the longitudinal direction of the floor so that it can be displaced relatively in the thickness direction. The plywood base material layer is provided on the back surface of the plywood substrate layer so that it can follow the displacement in the thickness direction of the floor material and the back side openings of the plurality of grooves are expanded. A back surface layer that can be restrained so as to restrain warpage of the plywood base material layer toward the side to be opened is provided.

本発明に係る床材は、上述のような構成としたことで、段差やがたつきの発生を抑制可能でありながらも、反りを抑制することができる。   Since the flooring according to the present invention is configured as described above, it is possible to suppress warpage while suppressing the occurrence of steps and rattling.

(a)は、本発明の一実施形態に係る床材の一例を模式的に示す一部破断概略縦断面図、(b)〜(d)は、本発明の他の実施形態に係る床材の一例をそれぞれ模式的に示す一部破断概略縦断面図である。(A) is a partially broken schematic longitudinal cross-sectional view which shows typically an example of the flooring which concerns on one Embodiment of this invention, (b)-(d) is the flooring which concerns on other embodiment of this invention. It is a partially broken schematic longitudinal cross-sectional view which shows typically an example of each. (a)〜(d)は、本発明の更に他の実施形態に係る床材の一例をそれぞれ模式的に示す一部破断概略縦断面図である。(A)-(d) is a partially broken schematic longitudinal cross-sectional view which shows typically an example of the flooring which concerns on other embodiment of this invention, respectively. 本発明に係る床材の実施例と比較例とを評価試験の結果とともに示す表である。It is a table | surface which shows the Example and comparative example of the flooring which concern on this invention with the result of an evaluation test.

以下に本発明の実施の形態について、図面に基づいて説明する。
なお、図1(a)〜(d)及び図2(a)〜(d)では、各実施形態に係る床材を幅方向に分断するように切断した状態、つまり、各実施形態に係る床材の長手方向両端側が図示されるように切断した状態における縦断面図としている。
Embodiments of the present invention will be described below with reference to the drawings.
In addition, in FIG. 1 (a)-(d) and FIG.2 (a)-(d), the state which cut | disconnected so that the flooring which concerns on each embodiment might be divided in the width direction, ie, the floor which concerns on each embodiment. It is the longitudinal cross-sectional view in the state cut | disconnected so that the longitudinal direction both ends side of material might be illustrated.

図1(a)は、第1実施形態に係る床材の一例を模式的に示す図である。
本実施形態に係る床材1は、図1(a)に示すように、一方向に長尺状とされ、合板基材層10の表面(上面)側に表面化粧層20を設けた構成とされている。
この床材1は、略矩形平板状とされており、設置対象としての床下地2上に床材長手方向及び床材幅方向に複数枚が並べられて床面を構成する。この床材1は、床下地2にねじや釘等の止具や、接着剤等を用いて施工されるものとしてもよく、または、このような止具や接着剤等を用いずに、床下地2上にいわゆる置敷床的に施工されるものとしてもよい。また、床下地2としては、例えば、根太や床下地ボード、床スラブ等でもよく、また、いわゆるフリーアクセスフロア(OAフロア)等の二重床下地でもよい。また、このような二重床下地としては、正方形状の下地パネルの裏面側(下面側)に配線等の空間が設けられるように支柱が設けられたようなものとしてもよい。
Fig.1 (a) is a figure which shows typically an example of the flooring which concerns on 1st Embodiment.
As shown in FIG. 1A, the flooring 1 according to the present embodiment is elongated in one direction, and has a configuration in which a surface decorative layer 20 is provided on the surface (upper surface) side of the plywood base material layer 10. Has been.
This floor material 1 is made into a substantially rectangular flat plate shape, and a plurality of sheets are arranged in a floor material longitudinal direction and a floor material width direction on a floor base 2 as an installation target to constitute a floor surface. The flooring 1 may be constructed on the floor base 2 using a fastener such as a screw or a nail, an adhesive, or the like, or under the floor without using such a fastener or an adhesive. It is good also as what is constructed on the ground 2 like what is called a flooring. Further, the floor foundation 2 may be, for example, a joist, a floor foundation board, a floor slab, or a double floor foundation such as a so-called free access floor (OA floor). Moreover, as such a double floor base, it is good also as what provided the support | pillar so that spaces, such as wiring, may be provided in the back surface side (lower surface side) of a square-shaped base panel.

この床材1の長さ寸法や幅寸法、厚さ寸法等は、一般的な床材の各寸法と概ね同寸法としてもよい。例えば、床材1を、長さ寸法が1500mm〜2000mm程度、幅寸法が250mm〜500mm程度とされた長尺板状体としてもよい。また、床材1を、置敷床的に施工されるものとした場合には、上記よりも小さい寸法としてもよい。例えば、床材1を、長さ寸法が600mm〜1200mm程度、幅寸法が100mm〜200mm程度とされたものとしてもよい。
また、床材1は、厚さ寸法が5mm〜30mm程度とされたものとしてもよく、5mm〜15mm程度とされたものとしてもよい。
The length dimension, the width dimension, the thickness dimension, and the like of the flooring 1 may be approximately the same as the dimensions of a general flooring. For example, the flooring 1 may be a long plate-like body having a length dimension of about 1500 mm to 2000 mm and a width dimension of about 250 mm to 500 mm. Moreover, when the flooring 1 is to be constructed like a floor, it may be smaller than the above. For example, the flooring 1 may have a length dimension of about 600 mm to 1200 mm and a width dimension of about 100 mm to 200 mm.
The flooring 1 may have a thickness of about 5 mm to 30 mm, or about 5 mm to 15 mm.

また、本実施形態では、床材1の長手方向両端部に、長手方向に隣り合う床材1に接合される実部3,4を設けた構成としている。図例では、長手方向一端部に、床材長手方向外方側に向けて突出する雄実部3を設け、長手方向他端部に、床材長手方向外方側に向けて開口する雌実部4を設けた構成としている。つまり、長手方向両端部に本実状の実部3,4を設けた例を示している。また、床材1の幅方向両端部の図示を省略しているが、幅方向両端部には幅方向に隣り合う床材1に接合される実部を設けていない構成としてもよい。つまり、床材1の幅方向両端面を、幅方向外方側に向く平坦な垂直面状としてもよい。また、実部に代えて、床材1の幅方向両端部に、治具等の差込凹所を設けた構成としてもよい。このような差込凹所としては、床材長手方向に延びるように全長に亘って溝状に設けられたものとしてもよい。または、床材1の幅方向両端部にも、上記同様な実部3,4を設けた構成としてもよく、このような本実に代えて、床材1の四周端部に相じゃくり状の実部を設けた構成としてもよい。また、図例では、床材1の長手方向両端部の表面側縁部にC面取り状の面取り部が設けられた例を示しているが、床材1の幅方向両端部の表面側縁部にも同様な面取り部が設けられたものとしてもよい。   Moreover, in this embodiment, it is set as the structure which provided the real parts 3 and 4 joined to the flooring 1 adjacent to a longitudinal direction in the longitudinal direction both ends of the flooring 1. FIG. In the illustrated example, a male part 3 projecting toward the floor material longitudinal direction outward side is provided at one end in the longitudinal direction, and a female fruit opening toward the floor material longitudinal direction outward side at the other end in the longitudinal direction. The part 4 is provided. That is, an example is shown in which the actual parts 3 and 4 are provided at both ends in the longitudinal direction. Moreover, although illustration of the both ends of the width direction of the flooring 1 is abbreviate | omitted, it is good also as a structure which does not provide the real part joined to the flooring 1 adjacent to the width direction at both ends of the width direction. That is, it is good also considering the width direction both end surfaces of the flooring 1 as flat vertical surface shape which faces the width direction outward side. Moreover, it is good also as a structure which provided insertion recesses, such as a jig | tool, in the width direction both ends of the flooring 1 instead of the real part. As such an insertion recess, it is good also as what was provided in groove shape over the full length so that it might extend in a flooring longitudinal direction. Or it is good also as a structure which provided the real parts 3 and 4 similar to the above also in the width direction both ends of the flooring 1, and it replaces with this actuality, and it is a ladle-like shape in the four peripheral edge part of the flooring 1. It is good also as a structure which provided the real part. Moreover, although the example of a figure has shown the example in which the chamfered chamfered part was provided in the surface side edge of the longitudinal direction both ends of the flooring 1, the surface side edge of the width direction both ends of the flooring 1 is shown. Also, a similar chamfer may be provided.

合板基材層10は、床材長手方向に繊維方向を沿わせた奇数層の単板11,13,15と床材幅方向に繊維方向を沿わせた偶数層の単板12,14とからなる3枚以上で奇数枚の単板11,12,13,14,15を積層した構成とされている。また、合板基材層10は、床材幅方向の全体に亘って延びるように裏面側において開口する複数本の溝18が設けられた構成とされている。
本実施形態では、合板基材層10を、5枚の単板11,12,13,14,15を積層したいわゆる5プライ合板としている。つまり、本実施形態では、合板基材層10は、表面側から一枚目の単板としての第1単板11、表面側から二枚目の単板としての第2単板12、第3単板13、第4単板14及び第5単板15を表面側からこの順に積層した構成とされている。また、第1単板11、第3単板13及び第5単板15が床材長手方向に繊維方向を沿わせた奇数層の単板を構成し、第2単板12及び第4単板14が床材幅方向に繊維方向を沿わせた偶数層の単板を構成する。これら単板11,12,13,14,15の樹種としては、ラワンやシナノキ、カラマツ、パイン、杉等、種々の樹種が挙げられる。また、全ての単板11,12,13,14,15の樹種を同一の樹種としてもよいが、複数の樹種を組み合わせた構成としてもよい。
The plywood base material layer 10 is composed of odd-numbered single plates 11, 13, and 15 along the fiber direction in the floor material longitudinal direction and even-numbered single plates 12 and 14 along the fiber direction in the floor material width direction. It is set as the structure which laminated | stacked the odd number single plate 11,12,13,14,15 by three or more. Moreover, the plywood base material layer 10 is configured to have a plurality of grooves 18 that are open on the back surface side so as to extend over the entire floor material width direction.
In this embodiment, the plywood base material layer 10 is a so-called five-ply plywood in which five single plates 11, 12, 13, 14, and 15 are laminated. That is, in this embodiment, the plywood base material layer 10 includes the first single plate 11 as the first single plate from the front surface side, the second single plate 12 as the second single plate from the front surface side, and the third single plate. The single plate 13, the fourth single plate 14, and the fifth single plate 15 are stacked in this order from the surface side. In addition, the first single plate 11, the third single plate 13 and the fifth single plate 15 constitute an odd-numbered single plate along the fiber direction in the longitudinal direction of the flooring, and the second single plate 12 and the fourth single plate. 14 constitutes a single plate of an even number of layers along the fiber direction in the floor material width direction. Examples of the tree species of these single plates 11, 12, 13, 14, and 15 include various tree species such as lauan, linden, larch, pine, and cedar. Moreover, although the tree species of all the single boards 11, 12, 13, 14, and 15 may be the same tree species, a configuration in which a plurality of tree species are combined may be employed.

また、これら単板11,12,13,14,15の厚さは、合板基材層10自体の厚さに応じて、また、各単板11,12,13,14,15の成形性等の観点や、合板基材層10の強度上の観点等から適宜の厚さとされたものとしてもよい。床材1の厚さ方向の大部分を占める合板基材層10の厚さは、床材1の厚さ寸法に応じて適宜の寸法としてもよく、例えば、2.5mm以上としてもよく、3mm〜30mm程度としてもよく、5mm〜15mm程度としてもよい。また、各単板11,12,13,14,15の厚さは、0.5mm〜5mm程度としてもよく、0.5mm〜3mm程度としてもよい。これら単板11,12,13,14,15は、全てが同厚さとされたものとしてもよいが、少なくとも一枚が異なる厚さとされたものとしてもよい。好ましくは、床材幅方向に見て、合板基材層10が厚さ方向中心線を対称軸として線対称状となるような層構成としてもよい。図例では、第1単板11と第5単板15とを同厚さとし、第2単板12と第4単板14とを同厚さとし、これら第2単板12及び第4単板14の厚さを、第1単板11及び第5単板15の厚さよりも大とした例を示している。また、第3単板13の厚さを、第1単板11及び第5単板15の厚さよりも大とし、第2単板12及び第4単板14の厚さよりも小とした例を示している。また、合板基材層10としては、複数枚の合板を適宜の接着剤等を介して積層一体化した構成とされたものでもよい。   Further, the thickness of the single plates 11, 12, 13, 14, 15 depends on the thickness of the plywood base material layer 10 itself, and the moldability of the single plates 11, 12, 13, 14, 15 and the like. It is good also as what was made into appropriate thickness from a viewpoint on the intensity | strength of this, the viewpoint on the intensity | strength of the plywood base material layer 10, etc. The thickness of the plywood substrate layer 10 that occupies most of the thickness direction of the flooring 1 may be an appropriate dimension according to the thickness dimension of the flooring 1, for example, 2.5 mm or more, or 3 mm. About 30 mm or about 5 mm to 15 mm may be used. The thickness of each single plate 11, 12, 13, 14, 15 may be about 0.5 mm to 5 mm, or about 0.5 mm to 3 mm. These single plates 11, 12, 13, 14, and 15 may all have the same thickness, or at least one of them may have a different thickness. Preferably, the plywood base material layer 10 may have a layer configuration in which the plywood base material layer 10 is axisymmetric with respect to the center line in the thickness direction as viewed in the floor width direction. In the illustrated example, the first single plate 11 and the fifth single plate 15 have the same thickness, the second single plate 12 and the fourth single plate 14 have the same thickness, and the second single plate 12 and the fourth single plate 14. In this example, the thickness of the first single plate 11 and the fifth single plate 15 is larger than the thickness of the first single plate 11 and the fifth single plate 15. Further, an example in which the thickness of the third single plate 13 is larger than the thickness of the first single plate 11 and the fifth single plate 15 and smaller than the thickness of the second single plate 12 and the fourth single plate 14. Show. Further, the plywood substrate layer 10 may have a structure in which a plurality of plywoods are laminated and integrated through an appropriate adhesive or the like.

この合板基材層10の裏面側に設けられた複数本の溝18は、床材長手方向に間隔を空けて、かつ溝底が表面側から二枚目の単板としての第2単板12の層内に位置するように設けられている。つまり、これら複数本の溝18は、これら複数本の溝18によって合板基材層10の最裏面側となる第5単板15、第4単板14及び第3単板13を床材長手方向に分断し、かつ第2単板12の表面側の一部を残すように設けられている。つまりは、これら複数本の溝18は、合板基材層10の表面側となる第1単板11には達しないように設けられている。また、これら複数本の溝18は、これら複数本の溝18によって床材長手方向に区分される当該床材1の床材長手方向に間隔を空けた部位同士が床下地2の段差(不陸)に追従して床材厚さ方向に相対的に変位可能なように設けられている。つまり、当該床材1が床下地2の段差を跨ぐように配されれば、当該床材1の長手方向に間隔を空けた部位同士が床材厚さ方向に相対的に変位し、当該床材1の裏面の概ね全面が床下地2に当接し、浮きやがたつきの抑制が可能とされている。また、これら複数本の溝18を、床材幅方向に見て床材1が表面側に突湾曲状に変形可能で、隣り合う床材1との長手方向両端側の実接合の解除が可能なように設けてもよい。このような構成とすれば、床材1を置敷床的に施工すれば、施工後に一枚単位で床材1を容易に取り外すことができる。   The plurality of grooves 18 provided on the back surface side of the plywood base material layer 10 are spaced apart in the floor material longitudinal direction, and the groove bottom is the second single plate 12 as the second single plate from the front side. It is provided so that it may be located in the layer. That is, the plurality of grooves 18 are formed by connecting the fifth single plate 15, the fourth single plate 14, and the third single plate 13, which are the rearmost side of the plywood base material layer 10, with the plurality of grooves 18. And is provided so as to leave a part on the surface side of the second single plate 12. That is, the plurality of grooves 18 are provided so as not to reach the first single plate 11 on the surface side of the plywood substrate layer 10. In addition, the plurality of grooves 18 are configured such that portions spaced apart in the floor material longitudinal direction of the floor material 1 divided by the plurality of grooves 18 in the floor material longitudinal direction are steps (unevenness) of the floor foundation 2. ) To be relatively displaceable in the floor material thickness direction. That is, if the floor material 1 is arranged so as to straddle the step of the floor base 2, the parts spaced apart in the longitudinal direction of the floor material 1 are relatively displaced in the floor material thickness direction, and the floor Almost the entire back surface of the material 1 is brought into contact with the floor base 2 so that floating and rattling can be suppressed. In addition, the floor material 1 can be deformed in a protruding shape on the surface side when the plurality of grooves 18 are viewed in the width direction of the floor material, and the actual joining at both ends in the longitudinal direction with the adjacent floor material 1 can be released. It may be provided as such. If it is set as such a structure, if the flooring 1 is constructed like an installation floor, the flooring 1 can be easily removed in units of one piece after construction.

これら複数本の溝18は、溝深さ方向を床材厚さ方向に沿わせ、溝長手方向を床材幅方向に沿わせて設けられている。また、本実施形態では、これら複数本の溝18を、床材長手方向に等間隔を空けて長手方向の略全体に亘って設けた構成としている。つまり、合板基材層10の長手方向一端部から長手方向他端部に至るまで等間隔を空けて複数本の溝18を設けた構成としている。また、各溝18を、溝長手方向に見て略矩形溝状としている。つまり、各溝18は、床材1の表裏面に平行状とされた溝底と床材長手方向に沿う方向に向き、互いに平行状とされた両溝側壁とによって区画されている。なお、このような態様に代えて、各溝18を、溝長手方向に見て略U字溝状等としてもよい。
また、各溝18の溝深さ寸法を、全て同一とし、各溝18の溝幅寸法を、全て同一としている。
The plurality of grooves 18 are provided with the groove depth direction along the floor material thickness direction and the groove longitudinal direction along the floor material width direction. Moreover, in this embodiment, it is set as the structure which provided these several groove | channels 18 over substantially the whole length direction at equal intervals in the flooring longitudinal direction. That is, the plurality of grooves 18 are provided at equal intervals from one longitudinal end of the plywood base material layer 10 to the other longitudinal end. Each groove 18 has a substantially rectangular groove shape when viewed in the groove longitudinal direction. In other words, each groove 18 is defined by a groove bottom that is parallel to the front and back surfaces of the flooring 1 and both groove sidewalls that are parallel to each other in the direction along the longitudinal direction of the flooring. Instead of such an aspect, each groove 18 may have a substantially U-shaped groove shape or the like when viewed in the groove longitudinal direction.
Further, the groove depth dimensions of the grooves 18 are all the same, and the groove width dimensions of the grooves 18 are all the same.

これら複数本の溝18の溝幅寸法や、隣り合う溝18,18間の寸法(溝間寸法)は、各溝18の加工性や、床材1の強度上の観点、段差(不陸)追従性の観点等から適宜の寸法としてもよい。例えば、各溝18の溝幅寸法を、1mm〜5mm程度としてもよく、好ましくは、1mm〜3mm程度としてもよい。この溝幅寸法を小さくし過ぎれば、加工性や不陸追従性が低下する傾向があり、溝幅寸法を大きくし過ぎれば、強度が低下する傾向がある。また、溝間寸法を、5mm〜20mm程度としてもよく、好ましくは、5mm〜15mm程度としてもよい。この溝間寸法を小さくし過ぎれば、強度が低下する傾向があり、溝間寸法を大きくし過ぎれば、不陸追従性が低下する傾向がある。   The groove width dimension of the plurality of grooves 18 and the dimension between the adjacent grooves 18 and 18 (inter-groove dimension) are determined in terms of the workability of each groove 18 and the strength of the flooring 1, and the level difference (unevenness). It is good also as an appropriate dimension from a viewpoint of followability. For example, the groove width dimension of each groove 18 may be about 1 mm to 5 mm, and preferably about 1 mm to 3 mm. If this groove width dimension is made too small, the workability and unevenness following ability tend to be lowered, and if the groove width dimension is made too large, the strength tends to be lowered. The inter-groove dimension may be about 5 mm to 20 mm, and preferably about 5 mm to 15 mm. If this inter-groove dimension is made too small, the strength tends to decrease, and if the inter-groove dimension is made too large, the non-land followability tends to decrease.

また、各溝18の溝深さ寸法は、合板基材層10の厚さに応じて、また、上記と概ね同様、床材1の強度上の観点や段差(不陸)追従性の観点等から適宜の寸法としてもよい。合板基材層10の厚さに対して溝深さ寸法を小さくし過ぎれば、不陸追従性が低下する傾向があり、合板基材層10の厚さに対して溝深さ寸法を大きくし過ぎれば、強度が低下する傾向がある。また、これら複数本の溝18が設けられた部位の第2単板12の溝底側の残り厚さt2は、床材1の強度上の観点や反りを抑制する観点から、また、第1単板11の厚さt1に応じて、適宜の寸法としてもよい。第2単板12の溝底側の残り厚さt2が第1単板11の厚さt1の1/10〜12/10(好ましくは、2/10〜9/10)程度となるように複数本の溝18を設けた構成としてもよい。本実施形態では、これら複数本の溝18を、第2単板12の溝底側の残り厚さt2が第1単板11の厚さt1の5/10〜7/10となるように設けた構成としている。図例では、第2単板12の溝底側の残り厚さt2を、第1単板11の厚さt1の7/10とした例を示している。この第2単板12の溝底側の残り厚さt2は、不陸追従性の観点や強度上の観点、反りを抑制する観点等から、適宜の寸法としてもよく、例えば、0.1mm〜2.0mm程度としてもよく、0.2mm〜1.2mm程度としてもよい。   Moreover, the groove depth dimension of each groove | channel 18 is based on the thickness of the plywood base material layer 10, and the viewpoint on the intensity | strength of the flooring 1 or a level | step difference (non-landing) followability etc. substantially the same as the above. It is good also as an appropriate dimension. If the groove depth dimension is made too small with respect to the thickness of the plywood base material layer 10, there is a tendency that the unevenness followability tends to be lowered. If too much, the strength tends to decrease. Further, the remaining thickness t2 on the groove bottom side of the second single plate 12 at the portion where the plurality of grooves 18 are provided is the first thickness from the viewpoint of suppressing the strength of the flooring 1 and warping. Depending on the thickness t <b> 1 of the single plate 11, the dimensions may be appropriate. A plurality of thicknesses t2 so that the remaining thickness t2 of the second single plate 12 on the groove bottom side is about 1/10 to 12/10 (preferably 2/10 to 9/10) of the thickness t1 of the first single plate 11. It is good also as a structure which provided the groove | channel 18 of the book. In the present embodiment, the plurality of grooves 18 are provided such that the remaining thickness t2 on the groove bottom side of the second single plate 12 is 5/10 to 7/10 of the thickness t1 of the first single plate 11. It has a configuration. In the illustrated example, the remaining thickness t2 on the groove bottom side of the second single plate 12 is shown as 7/10 of the thickness t1 of the first single plate 11. The remaining thickness t2 on the groove bottom side of the second single plate 12 may be an appropriate dimension from the viewpoint of unevenness followability, the viewpoint of strength, the viewpoint of suppressing warpage, and the like. It may be about 2.0 mm, or about 0.2 mm to 1.2 mm.

なお、図例では、床材長手方向一端側の最も雄実部3側に位置する溝18から雄実部3の突出方向先端までの床材長手方向に沿う寸法を、溝間寸法と同程度とした例を示している。また、床材長手方向他端側の最も雌実部4側に位置する溝18から雌実部4の開口縁部側となる床材長手方向他端面までの床材長手方向に沿う寸法を、溝間寸法と同程度とした例を示している。このような態様に代えて、これら床材長手方向両端側の各溝18,18を、図例よりも床材長手方向外方側や中央側に位置するように設けた態様としてもよい。
また、これら複数本の溝18は、適宜の切削工具を用いて切削加工等によって形成されたものとしてもよい。
また、合板基材層10に、床材長手方向の全体に亘って延びるように裏面側において開口する複数本の溝(縦溝)を床材幅方向に間隔(等間隔)を空けて設けた構成としてもよい。この場合は、これら縦溝の溝深さ寸法を、上記した床材幅方向に延びる各溝18の溝深さ寸法よりも小さくしてもよい。
In the illustrated example, the dimension along the floor material longitudinal direction from the groove 18 positioned closest to the male part 3 on one end side in the floor material longitudinal direction to the protrusion direction tip of the male part 3 is approximately the same as the dimension between the grooves. An example is shown. Further, the dimension along the floor material longitudinal direction from the groove 18 located closest to the female real part 4 side on the other end side in the floor material longitudinal direction to the other end surface in the floor material longitudinal direction on the opening edge side of the female real part 4, An example in which the dimensions are approximately the same as the inter-groove dimensions is shown. Instead of such an aspect, the grooves 18 and 18 on both ends in the longitudinal direction of the flooring material may be provided so as to be positioned on the outer side in the longitudinal direction of the flooring material and on the central side as compared with the illustrated example.
The plurality of grooves 18 may be formed by cutting or the like using an appropriate cutting tool.
The plywood base material layer 10 is provided with a plurality of grooves (vertical grooves) opened on the back surface side so as to extend over the entire length of the floor material in the floor material width direction at intervals (equal intervals). It is good also as a structure. In this case, the groove depth dimension of these vertical grooves may be smaller than the groove depth dimension of each groove 18 extending in the floor material width direction.

表面化粧層20は、合板基材層10の表面側に積層一体化されており、防湿層22を含んだ構成とされている。
本実施形態では、表面化粧層20を、防湿層22の表面側に表面化粧材21を積層した構成としている。
表面化粧材21としては、天然木材(銘木)から形成された突板等の単板(化粧単板)や、木目柄等の種々の柄(模様)が印刷された化粧印刷紙やオレフィン系等の合成樹脂系の樹脂シート(フィルム)等としてもよい。この表面化粧材21の厚さは、例えば、0.01mm〜1.0mm程度としてもよく、0.05mm〜0.5mm程度としてもよい。
The surface decorative layer 20 is laminated and integrated on the surface side of the plywood base material layer 10 and includes a moisture-proof layer 22.
In the present embodiment, the surface decorative layer 20 is configured by laminating the surface decorative material 21 on the surface side of the moisture-proof layer 22.
Examples of the surface decorative material 21 include a veneer (decorative veneer) such as a veneer formed from natural wood (named wood), a decorative printing paper printed with various patterns (patterns) such as a wood grain pattern, an olefin type, and the like. A synthetic resin-based resin sheet (film) may be used. The thickness of the surface decorative material 21 may be, for example, about 0.01 mm to 1.0 mm, or about 0.05 mm to 0.5 mm.

防湿層22は、薄シート状(フィルム状)とされたものとしてもよい。この防湿層22としては、ポリエチレン、ポリプロピレン、ポリ塩化ビニル、ポリエチレンテレフタレート等の合成樹脂系の樹脂シート(フィルム)としてもよく、また、アルミ箔等の金属薄膜シートやアスファルトシート等としてもよい。また、この防湿層22としては、透湿度(水蒸気透過度)が比較的に小さいものとしてもよい。また、防湿層22の厚さは、例えば、0.02mm〜1.0mm程度としてもよく、0.05mm〜0.5mm程度としてもよい。なお、表面化粧層20としては、表面化粧材21と防湿層22とを備えた複層構造とされたものに限られず、防湿性を有した表面化粧材21を表面化粧層20としてもよい。つまりは、表面化粧材21自体が防湿層として機能するものとしてもよい。また、表面化粧層20としては、上記のような表面化粧材21を設けた態様に代えて、または加えて、印刷層や透明(クリアー)保護膜などの塗膜層を含んだ構成としてもよい。   The moisture-proof layer 22 may be a thin sheet (film). The moisture-proof layer 22 may be a synthetic resin-based resin sheet (film) such as polyethylene, polypropylene, polyvinyl chloride, or polyethylene terephthalate, or may be a metal thin film sheet such as aluminum foil, an asphalt sheet, or the like. In addition, the moisture-proof layer 22 may have a relatively low moisture permeability (water vapor permeability). Moreover, the thickness of the moisture-proof layer 22 may be, for example, about 0.02 mm to 1.0 mm, or about 0.05 mm to 0.5 mm. The surface decorative layer 20 is not limited to a multi-layer structure including the surface decorative material 21 and the moisture-proof layer 22, and the surface decorative material 21 having moisture resistance may be used as the surface decorative layer 20. That is, the surface decorative material 21 itself may function as a moisture-proof layer. Further, the surface decorative layer 20 may include a coating layer such as a printing layer or a transparent protective film instead of or in addition to the aspect in which the surface decorative material 21 is provided as described above. .

また、合板基材層10の裏面には、上記した当該床材1の長手方向に間隔を空けた部位同士の床材厚さ方向への変位に追従可能な裏面層23が設けられている。本実施形態では、この裏面層23を、合板基材層10の裏面に貼着された裏面シート23としている。この裏面シート23としては、複数本の溝18の裏面側開口を塞ぐように合板基材層10の裏面に貼着され、合板基材層10への裏面側からの吸湿を抑制し得るものでもよい。例えば、裏面シート23としては、上記同様なオレフィン系樹脂やその他の樹脂等の合成樹脂系の樹脂シート(フィルム)としてもよく、紙シートやゴムシート等としてもよい。また、この裏面シート23を、厚さが0.5mm以下の樹脂シートとしてもよい。この裏面シート23の厚さを、例えば、0.01mm〜0.5mm程度としてもよく、0.1mm〜0.3mm程度としてもよい。また、このような吸湿を抑制する裏面シート23は、合板基材層10の裏面(雄実部の部位を除く裏面)の略全面に亘って貼着されたものでもよいが、合板基材層10の裏面の70%以上、好ましくは80%以上を覆うように貼着されたものでもよい。   Moreover, the back surface layer 23 which can follow the displacement to the floor material thickness direction of the parts spaced apart in the longitudinal direction of the said floor material 1 is provided on the back surface of the plywood base material layer 10. In the present embodiment, the back surface layer 23 is a back sheet 23 attached to the back surface of the plywood base material layer 10. As this back surface sheet 23, it is attached to the back surface of the plywood base material layer 10 so as to block the back surface side opening of the plurality of grooves 18, and can suppress moisture absorption from the back surface side to the plywood base material layer 10. Good. For example, the back sheet 23 may be a synthetic resin-based resin sheet (film) such as the above-mentioned olefin resin or other resin, or may be a paper sheet, a rubber sheet, or the like. The back sheet 23 may be a resin sheet having a thickness of 0.5 mm or less. The thickness of the back sheet 23 may be, for example, about 0.01 mm to 0.5 mm, or about 0.1 mm to 0.3 mm. Moreover, although the back surface sheet 23 which suppresses such moisture absorption may be affixed over substantially the entire back surface of the plywood base material layer 10 (the back surface excluding the male part), the plywood base material layer 10 may be attached so as to cover 70% or more, preferably 80% or more of the back surface.

また、このような裏面シート23としては、合板基材層10への裏面側からの吸湿を抑制し得る機能に代えて、または加えて、複数本の溝18の裏面側開口を拡開させる側への合板基材層10の反り(凹反り)を拘束するように抑制し得る機能を有したものとしてもよい。つまり、床材幅方向に見て床材長手方向中央部側が凹むような凹反りを物理的に拘束するように抑制し得る裏面シート23を合板基材層10の裏面に貼着した構成としてもよい。このような裏面シート23は、上記同様、複数本の溝18の裏面側開口を塞ぐように合板基材層10の裏面の略全面に亘って貼着されたものでもよいが、合板基材層10の裏面に略全長に亘って貼着された細幅状とされたものでもよい。この場合は、複数枚の裏面シート23を、合板基材層10の裏面に幅方向に間隔を空けて貼着した構成等としてもよい。   Moreover, as such a back surface sheet 23, instead of or in addition to the function capable of suppressing moisture absorption from the back surface side to the plywood base material layer 10, the side on which the back surface side opening of the plurality of grooves 18 is expanded. The plywood substrate layer 10 may have a function capable of suppressing warpage (concave warpage) of the plywood substrate layer 10. That is, even if it has a configuration in which the back sheet 23 that can be restrained so as to physically constrain the concave warpage such that the center part in the floor material longitudinal direction is recessed when viewed in the floor material width direction is attached to the back surface of the plywood base material layer 10. Good. Such a back sheet 23 may be affixed over substantially the entire back surface of the plywood base material layer 10 so as to close the back side openings of the plurality of grooves 18 as described above. It may be a narrow width attached to the back surface of 10 over substantially the entire length. In this case, it is good also as a structure etc. which affixed the several back sheet 23 on the back surface of the plywood base material layer 10 at intervals in the width direction.

また、上記のような拘束によって凹反りを抑制する裏面シート23としては、ガラス繊維や炭素繊維、鉱物繊維等の強化繊維の織布や不織布、マット等の強化繊維シートが例示される。また、裏面シート23としては、ガラス繊維シートとしてもよく、例えば、シート化されたガラス繊維にエポキシ樹脂やアクリル樹脂等の接着剤を塗布して形成されたたガラス繊維不織布(ガラスペーパー)としてもよい。また、裏面シート23としては、ガラス繊維等の強化繊維に、パルプ等の紙原料をすき合わせたものでもよい。また、裏面シート23としては、このような強化繊維シートに樹脂を含浸させた強化繊維樹脂シート等の強化繊維混合シートとしてもよい。また、裏面シート23を、このような強化繊維シートや強化繊維混合シートとした場合には、厚さを0.1mm以上1.0mm以下としてもよく、好ましくは0.8mm以下としてもよく、0.3mm〜0.5mm程度としてもよい。また、裏面シート23としては、このような強化繊維シートに、上記のような紙シートや樹脂シート等を積層した複層構造とされたものでもよい。また、上記のような種々の裏面シート23と合板基材層10とは、適宜の接着剤を介して積層一体化されたものでもよいが、裏面シート23に設けられた粘着層を介して積層一体化されたものでもよい。このような粘着層を有した裏面シート23としては、PP(ポリプロピレン)テープやPE(ポリエチレン)テープ等の樹脂系粘着テープとしてもよい。また、合板基材層10の裏面に設けられる裏面層23としては、合板基材層10の裏面に貼着される裏面シート23に限られない。例えば、裏面層23としては、硬化後にシート状(薄板状)となるホットメルト系接着剤等の接着剤が合板基材層10の裏面に塗布されて形成された接着剤硬化層でもよい。   Moreover, as the back surface sheet 23 which suppresses a concave curvature by the above constraints, a reinforced fiber sheet such as a woven or nonwoven fabric of a reinforcing fiber such as glass fiber, carbon fiber, or mineral fiber, or a mat is exemplified. Moreover, as the back surface sheet 23, it is good also as a glass fiber sheet, for example, as a glass fiber nonwoven fabric (glass paper) formed by apply | coating adhesives, such as an epoxy resin and an acrylic resin, to the glass fiber formed into a sheet. Good. Moreover, as the back surface sheet 23, paper materials such as pulp may be combined with reinforcing fibers such as glass fibers. The back sheet 23 may be a reinforcing fiber mixed sheet such as a reinforcing fiber resin sheet obtained by impregnating such a reinforcing fiber sheet with a resin. Further, when the back sheet 23 is such a reinforcing fiber sheet or a reinforcing fiber mixed sheet, the thickness may be 0.1 mm or more and 1.0 mm or less, preferably 0.8 mm or less. It is good also as about 3 mm-0.5 mm. The back sheet 23 may have a multilayer structure in which such a reinforcing fiber sheet is laminated with a paper sheet, a resin sheet, or the like as described above. Further, the various back sheets 23 and the plywood base layer 10 as described above may be laminated and integrated through an appropriate adhesive, but are laminated through an adhesive layer provided on the back sheet 23. It may be integrated. The back sheet 23 having such an adhesive layer may be a resin adhesive tape such as a PP (polypropylene) tape or a PE (polyethylene) tape. Further, the back surface layer 23 provided on the back surface of the plywood base material layer 10 is not limited to the back surface sheet 23 attached to the back surface of the plywood base material layer 10. For example, the back surface layer 23 may be a cured adhesive layer formed by applying an adhesive such as a hot-melt adhesive that forms a sheet (thin plate) after curing to the back surface of the plywood substrate layer 10.

本実施形態に係る床材1は、上述のような構成としたことで、段差やがたつきの発生を抑制可能でありながらも、反りを抑制することができる。
つまり、合板基材層10の裏面側に、上記のように複数本の溝18を設けた構成としている。従って、床下地2に段差や不陸があるような場合にも、当該床材1が追従するように変形し、隣り合う床材1同士に段差が生じたり、踏んだ際にがたつきが生じたりすることを抑制することができる。また、荷重によって床下地2が沈み込む傾向がある上記のようなフリーアクセスフロア(OAフロア)の床仕上材として好適なものとなる。つまり、隣り合う下地パネルを跨ぐように床材1を施工した場合において、一方の下地パネルが荷重によって沈み込んだ場合にも、他方の下地パネル上に配された床材1の部位が浮き上がる(跳ね上がる)ようなことを抑制することができる。これにより、止具や接着剤等を用いることなく床下地2上にいわゆる置敷床的に施工されるものとしても好適なものとなる。
Since the flooring 1 according to the present embodiment is configured as described above, it is possible to suppress warpage while suppressing the occurrence of steps and rattling.
That is, the plurality of grooves 18 are provided on the back surface side of the plywood base material layer 10 as described above. Therefore, even when there is a level difference or unevenness in the floor base 2, the floor material 1 is deformed so that the floor material 1 follows, and there is a level difference between adjacent floor materials 1 or rattling when stepped on. It can suppress that it arises. Moreover, it becomes a suitable thing as a floor finishing material of the above-mentioned free access floor (OA floor) in which the floor base 2 tends to sink by load. That is, when the flooring 1 is constructed so as to straddle adjacent basement panels, even when one basement panel sinks due to a load, the portion of the flooring 1 arranged on the other basement panel is lifted ( Such as jumping up). Thereby, it becomes suitable also as what is constructed like what is called a flooring on the floor base 2 without using a fastener, an adhesive agent, etc.

また、上記のように変形可能でありながらも、合板基材層10における床材長手方向に繊維方向を沿わせた最表層の第1単板11及び一部に溝18が形成された第2単板12によって床材1自体の破損等を抑制することができる。
また、合板基材層10の裏面に、上記のような床材1の変位に追従可能で、かつ合板基材層10への裏面側からの吸湿を抑制し得る裏面シート(裏面層)23を複数本の溝18の裏面側開口を塞ぐように設けた構成とすれば、吸湿による反りを抑制することができる。つまり、段差や不陸に追従するように変形可能でありながらも、裏面シート23によって合板基材層10の吸湿を抑制することができ、吸湿による反りを抑制することができる。
また、合板基材層10の裏面に、床材1の変位に追従可能で、かつ複数本の溝18の裏面側開口を拡開させる側への合板基材層10の反り(凹反り)を拘束するように抑制し得る裏面シート(裏面層)23を設けた構成としても、概ね同様の効果を奏する。つまり、吸湿自体を抑制する態様に代えて、吸湿によって凹反りしようとする合板基材層10の変形を物理的に拘束するようにして抑制することができる。
また、表面化粧層20を、防湿層22を含んだ構成としている。従って、表面側からの吸湿を抑制することができ、後記するように、日光照射状態に近似させた投光負荷に起因する反りを抑制することができる。
Moreover, while being deformable as described above, the first single plate 11 of the outermost layer along the fiber direction in the floor material longitudinal direction in the plywood base material layer 10 and the second in which the groove 18 is formed in a part. Damage to the flooring 1 itself can be suppressed by the single plate 12.
Further, a back sheet (back surface layer) 23 that can follow the displacement of the flooring 1 as described above and can suppress moisture absorption from the back surface side to the plywood base material layer 10 is provided on the back surface of the plywood base material layer 10. If it is set as the structure provided so that the back surface side opening of the several groove | channel 18 may be plugged up, the curvature by moisture absorption can be suppressed. That is, although it can be deformed so as to follow a step or unevenness, moisture absorption of the plywood base material layer 10 can be suppressed by the back sheet 23, and warpage due to moisture absorption can be suppressed.
Further, warpage (concave warpage) of the plywood base material layer 10 to the side that can follow the displacement of the flooring 1 and expand the back side opening of the plurality of grooves 18 on the back surface of the plywood base material layer 10. Even when the back sheet (back layer) 23 that can be restrained to be restrained is provided, the same effects can be obtained. That is, instead of the mode of suppressing moisture absorption itself, the deformation of the plywood base material layer 10 that tends to warp due to moisture absorption can be suppressed by being physically constrained.
Further, the surface decorative layer 20 includes a moisture-proof layer 22. Therefore, moisture absorption from the surface side can be suppressed and, as will be described later, it is possible to suppress warping caused by a light projection load approximated to a sunlight irradiation state.

また、本実施形態では、複数本の溝18を、第2単板12の溝底側の残り厚さt2が第1単板11の厚さt1の5/10〜7/10となるように設けた構成としている。従って、合板基材層10における最表層となる第1単板11の厚さt1に対して、第2単板12の溝18が形成された部位の溝底側の残り厚さt2が適度の厚さとなり、後記するように、低湿状態(平常状態(常態)や乾燥負荷状態)における反りを抑制することができる。つまり、第1単板11の厚さt1に対して第2単板12の溝底側の残り厚さt2を小さくし過ぎれば、第1単板11の影響が大となり、床材幅方向に見て床材長手方向中央部側が凹むように凹反りし易くなる傾向がある。一方、第1単板11の厚さt1に対して第2単板12の溝底側の残り厚さt2を大きくし過ぎれば、第2単板12の影響が大となり、床材幅方向に見て床材長手方向中央部側が突出するように凸反りし易くなる傾向がある。上記構成とすれば、このような反りを抑制することができる。   In the present embodiment, the plurality of grooves 18 are formed such that the remaining thickness t2 on the groove bottom side of the second single plate 12 is 5/10 to 7/10 of the thickness t1 of the first single plate 11. The configuration is provided. Therefore, the remaining thickness t2 on the groove bottom side of the portion where the groove 18 of the second single plate 12 is formed is moderate with respect to the thickness t1 of the first single plate 11 which is the outermost layer in the plywood substrate layer 10. As will be described later, the warp in a low humidity state (normal state (normal state) or dry load state) can be suppressed. That is, if the remaining thickness t2 on the groove bottom side of the second single plate 12 is made too small with respect to the thickness t1 of the first single plate 11, the influence of the first single plate 11 becomes large, and in the floor material width direction. The floor material longitudinal direction center part side sees and there exists a tendency which becomes easy to carry out a concave curvature so that it may dent. On the other hand, if the remaining thickness t2 on the groove bottom side of the second single plate 12 is made too large with respect to the thickness t1 of the first single plate 11, the influence of the second single plate 12 becomes large, and in the floor material width direction. It tends to be easy to bend and warp so that the floor material longitudinal direction center part side protrudes. If it is the said structure, such curvature can be suppressed.

また、裏面シート23を、厚さが0.5mm以下の樹脂シートとすれば、床材1の薄型化を図りながらも、段差や不陸に対する追従性を効果的に向上させ、吸湿による反りを効果的に抑制することができる。また、床材1の薄型化を図ることができるので、フリーアクセスフロア(OAフロア)の床仕上材としても好適なものとなる。
また、裏面シート23を、厚さが1.0mm以下のガラス繊維含有シートとした場合にも概ね同様の効果を奏する。また、吸湿によって凹反りしようとする合板基材層10の変形を、より効果的に物理的に拘束するようにして抑制することができる。
Further, if the back sheet 23 is a resin sheet having a thickness of 0.5 mm or less, the flooring material 1 can be made thin, and the followability to steps and unevenness can be effectively improved, and warping due to moisture absorption can be achieved. It can be effectively suppressed. Further, since the flooring 1 can be thinned, it is also suitable as a floor finishing material for a free access floor (OA floor).
Moreover, when the back surface sheet 23 is a glass fiber-containing sheet having a thickness of 1.0 mm or less, the same effect is obtained. Moreover, the deformation | transformation of the plywood base material layer 10 which is going to bend and bend by moisture absorption can be suppressed by physically constraining more effectively.

次に、本発明に係る他の実施形態について、図面を参照しながら説明する。
図1(b)は、第2実施形態に係る床材の一例を模式的に示す図である。
なお、上記第1実施形態との相違点について主に説明し、同様の構成については、同一の符号を付し、その説明を省略または簡略に説明する。
Next, another embodiment according to the present invention will be described with reference to the drawings.
FIG.1 (b) is a figure which shows typically an example of the flooring which concerns on 2nd Embodiment.
Note that differences from the first embodiment will be mainly described, and the same components will be denoted by the same reference numerals, and description thereof will be omitted or briefly described.

本実施形態に係る床材1Aは、図1(b)に示すように、合板基材層10Aの複数本の溝18Aの構成が、上記第1実施形態とは主に異なる。本実施形態では、上記同様の層構成とされた合板基材層10Aに設けられた複数本の溝18Aの溝深さ寸法を、上記第1実施形態よりも小としている。つまり、第2単板12の溝底側の残り厚さt2Aを、上記第1実施形態の第2単板12の溝底側の残り厚さt2よりも大としている。図例では、第2単板12の溝底側の残り厚さt2Aを、第1単板11の厚さt1の12/10とした構成としている。このような構成とすれば、上記第1実施形態と比べて、低湿状態において僅かに凸反りし易くなる傾向があるものの、上記した第1実施形態と概ね同様の効果を奏する。   As shown in FIG. 1B, the flooring 1A according to the present embodiment is mainly different from the first embodiment in the configuration of the plurality of grooves 18A of the plywood base material layer 10A. In the present embodiment, the groove depth dimension of the plurality of grooves 18A provided in the plywood substrate layer 10A having the same layer configuration as described above is smaller than that in the first embodiment. That is, the remaining thickness t2A on the groove bottom side of the second single plate 12 is made larger than the remaining thickness t2 on the groove bottom side of the second single plate 12 of the first embodiment. In the illustrated example, the remaining thickness t2A on the groove bottom side of the second single plate 12 is set to 12/10 of the thickness t1 of the first single plate 11. With such a configuration, compared to the first embodiment, although there is a tendency to slightly warp slightly in a low humidity state, the same effects as the first embodiment described above are exhibited.

次に、本発明に係る更に他の実施形態について、図面を参照しながら説明する。
図1(c)は、第3実施形態に係る床材の一例を模式的に示す図である。
なお、上記各実施形態との相違点について主に説明し、同様の構成については、同一の符号を付し、その説明を省略または簡略に説明する。
Next, still another embodiment according to the present invention will be described with reference to the drawings.
FIG.1 (c) is a figure which shows typically an example of the flooring which concerns on 3rd Embodiment.
Note that differences from the above embodiments are mainly described, and the same components are denoted by the same reference numerals, and description thereof is omitted or simplified.

本実施形態に係る床材1Bは、図1(c)に示すように、合板基材層10Bの複数本の溝18Bの構成が、上記第1実施形態とは主に異なる。本実施形態では、上記同様の層構成とされた合板基材層10Bに設けられた複数本の溝18Bの溝深さ寸法を、上記第1実施形態よりも大としている。つまり、第2単板12の溝底側の残り厚さt2Bを、上記第1実施形態の第2単板12の溝底側の残り厚さt2よりも小としている。図例では、第2単板12の溝底側の残り厚さt2Bを、第1単板11の厚さt1の2/10とした構成としている。このような構成とすれば、上記第1実施形態と比べて、低湿状態において僅かに凹反りし易くなる傾向があるものの、上記した第1実施形態と概ね同様の効果を奏する。   As shown in FIG. 1C, the flooring 1B according to the present embodiment is mainly different from the first embodiment in the configuration of the plurality of grooves 18B of the plywood base material layer 10B. In the present embodiment, the groove depth dimension of the plurality of grooves 18B provided in the plywood substrate layer 10B having the same layer configuration as described above is larger than that in the first embodiment. That is, the remaining thickness t2B on the groove bottom side of the second single plate 12 is set smaller than the remaining thickness t2 on the groove bottom side of the second single plate 12 of the first embodiment. In the illustrated example, the remaining thickness t2B on the groove bottom side of the second single plate 12 is set to 2/10 of the thickness t1 of the first single plate 11. With such a configuration, although there is a tendency to slightly warp in a low-humidity state as compared with the first embodiment, there are substantially the same effects as the first embodiment described above.

次に、本発明に係る更に他の実施形態について、図面を参照しながら説明する。
図1(d)は、第4実施形態に係る床材の一例を模式的に示す図である。
なお、上記各実施形態との相違点について主に説明し、同様の構成については、同一の符号を付し、その説明を省略または簡略に説明する。
Next, still another embodiment according to the present invention will be described with reference to the drawings.
FIG.1 (d) is a figure which shows typically an example of the flooring which concerns on 4th Embodiment.
Note that differences from the above embodiments are mainly described, and the same components are denoted by the same reference numerals, and description thereof is omitted or simplified.

本実施形態に係る床材1Cは、図1(d)に示すように、合板基材層10Cの構成が、上記各実施形態とは主に異なる。
本実施形態では、合板基材層10Cを、7枚の単板11A,12A,13A,14A,15A,16A,17Aを積層したいわゆる7プライ合板としている。つまり、本実施形態では、合板基材層10Cは、第1単板11A、第2単板12A、第3単板13A、第4単板14A、第5単板15A、第6単板16A及び第7単板17Aを表面側からこの順に積層した構成とされている。また、第1単板11A、第3単板13A、第5単板15A及び第7単板17Aが床材長手方向に繊維方向を沿わせた奇数層の単板を構成し、第2単板12A、第4単板14A及び第6単板16Aが床材幅方向に繊維方向を沿わせた偶数層の単板を構成する。
As shown in FIG. 1D, the flooring 1C according to the present embodiment is mainly different from the above embodiments in the configuration of the plywood base material layer 10C.
In the present embodiment, the plywood substrate layer 10C is a so-called 7-ply plywood in which seven single plates 11A, 12A, 13A, 14A, 15A, 16A, and 17A are laminated. That is, in the present embodiment, the plywood substrate layer 10C includes the first single plate 11A, the second single plate 12A, the third single plate 13A, the fourth single plate 14A, the fifth single plate 15A, the sixth single plate 16A, and It is set as the structure which laminated | stacked the 7th single board 17A in this order from the surface side. Further, the first single plate 11A, the third single plate 13A, the fifth single plate 15A, and the seventh single plate 17A constitute an odd-numbered single plate along the fiber direction in the floor material longitudinal direction, and the second single plate 12A, the 4th single board 14A, and the 6th single board 16A constitute the single board of the even number layer which made the fiber direction run along the flooring width direction.

また、本実施形態では、合板基材層10Cの厚さを、上記各実施形態と同厚さとする一方、内層側の単板(第2単板12A〜第6単板16A)の厚さを、上記各実施形態よりも小としている。図例では、最表層側となる第1単板11A及び最裏層側となる第7単板17Aの厚さを、上記各実施形態の第1単板11及び第5単板15と同厚さとした例を示している。また、図例では、同厚さとされた第1単板11A及び第7単板17A以外の単板12A,13A,14A,15A,16Aを同厚さとし、これらの厚さを第1単板11A及び第7単板17Aの厚さよりも大としている。
また、本実施形態では、複数本の溝18Cを、上記第1実施形態と同様、第2単板12Aの溝底側の残り厚さt2が第1単板11Aの厚さt1の7/10となるように設けた構成としている。
上記構成とされた本実施形態に係る床材1Cにおいても、上記した第1実施形態と略同様の効果を奏する。
In the present embodiment, the thickness of the plywood base material layer 10C is set to the same thickness as that of each of the above embodiments, while the thickness of the inner layer side single plate (second single plate 12A to sixth single plate 16A) is set to be the same. These are smaller than those in the above embodiments. In the illustrated example, the thickness of the first single plate 11A on the outermost layer side and the thickness of the seventh single plate 17A on the outermost layer side are the same as those of the first single plate 11 and the fifth single plate 15 of the above embodiments. An example is shown. In the illustrated example, the single plates 12A, 13A, 14A, 15A, and 16A other than the first single plate 11A and the seventh single plate 17A having the same thickness have the same thickness, and these thicknesses are the first single plate 11A. In addition, the thickness is larger than the thickness of the seventh single plate 17A.
Further, in the present embodiment, the plurality of grooves 18C are formed in a manner that the remaining thickness t2 on the groove bottom side of the second single plate 12A is 7/10 of the thickness t1 of the first single plate 11A, as in the first embodiment. It is set as the structure provided so that it may become.
Also in the flooring 1C according to the present embodiment having the above-described configuration, there are substantially the same effects as those of the first embodiment described above.

次に、本発明に係る更に他の実施形態について、図面を参照しながら説明する。
図2(a)は、第5実施形態に係る床材の一例を模式的に示す図である。
なお、上記各実施形態との相違点について主に説明し、同様の構成については、同一の符号を付し、その説明を省略または簡略に説明する。
Next, still another embodiment according to the present invention will be described with reference to the drawings.
Fig.2 (a) is a figure which shows typically an example of the flooring which concerns on 5th Embodiment.
Note that differences from the above embodiments are mainly described, and the same components are denoted by the same reference numerals, and description thereof is omitted or simplified.

本実施形態に係る床材1Dは、図2(a)に示すように、合板基材層10D及び複数本の溝18Dの構成が、上記各実施形態とは主に異なる。
また、本実施形態では、合板基材層10Dの裏面側に、基材層を構成する裏面側層24を更に積層した構成としている。つまり、合板基材層10Dの裏面側と裏面シート23との間に裏面側層24を設けた構成としている。
裏面側層24は、合板基材層10Dの裏面側に積層一体化されており、防湿層26を含んだ構成とされている。本実施形態では、この裏面側層24を、上記した表面化粧層20の表裏を反転させたような構成としている。つまり、合板基材層10Dの裏面側にシート状の防湿層26と、上記した表面化粧材21と同様な裏層材25と、を設けた構成としている。複数本の溝18Dは、この裏面側層24を含んで設けられている。つまり、裏面側層24の裏層材25が複数本の溝18Dの裏面側開口両縁を構成している。なお、裏面側層24としては、このような態様に限られず、その他、種々の変形が可能であり、さらには、このような裏面側層24を設けないようにしてもよい。
As shown in FIG. 2A, the flooring 1D according to the present embodiment is mainly different from the above embodiments in the configuration of the plywood base material layer 10D and the plurality of grooves 18D.
Moreover, in this embodiment, it is set as the structure which further laminated | stacked the back surface side layer 24 which comprises a base material layer on the back surface side of the plywood base material layer 10D. That is, the back surface side layer 24 is provided between the back surface side of the plywood base material layer 10 </ b> D and the back surface sheet 23.
The back surface side layer 24 is laminated and integrated on the back surface side of the plywood base material layer 10 </ b> D, and includes a moisture-proof layer 26. In the present embodiment, the back surface layer 24 is configured such that the front and back surfaces of the surface decorative layer 20 are reversed. That is, it is set as the structure which provided the sheet-like moisture-proof layer 26 and the back layer material 25 similar to the above-mentioned surface decoration material 21 in the back surface side of the plywood base material layer 10D. The plurality of grooves 18 </ b> D are provided including the back side layer 24. That is, the back layer material 25 of the back side layer 24 constitutes both edges of the back side opening of the plurality of grooves 18D. In addition, as the back surface side layer 24, it is not restricted to such an aspect, A various deformation | transformation is possible for others, Furthermore, you may make it not provide such a back surface layer 24. FIG.

また、本実施形態では、合板基材層10Dの厚さを、上記第1実施形態の合板基材層10の厚さよりも小としている。また、合板基材層10Dを、上記第1実施形態と概ね同様、5枚の単板11B,12B,13B,14B,15Bを積層した構成としている。図例では、各単板11B,12B,13B,14B,15Bの厚さを、上記第1実施形態の対応する各単板11,12,13,14,15の厚さよりも小とした例を示している。
また、本実施形態では、複数本の溝18Dを、上記第1実施形態と概ね同様、第2単板12Bの溝底側の残り厚さt2Cが第1単板11Bの厚さt1Aの2/3(約6.7/10)となるように設けた構成としている。
上記構成とされた本実施形態に係る床材1Dにおいても、上記した第1実施形態と略同様の効果を奏する。
In the present embodiment, the thickness of the plywood substrate layer 10D is smaller than the thickness of the plywood substrate layer 10 of the first embodiment. Further, the plywood base material layer 10D has a configuration in which five single plates 11B, 12B, 13B, 14B, and 15B are laminated in the same manner as in the first embodiment. In the illustrated example, the thickness of each single plate 11B, 12B, 13B, 14B, 15B is smaller than the thickness of each corresponding single plate 11, 12, 13, 14, 15 in the first embodiment. Show.
Further, in the present embodiment, the plurality of grooves 18D are substantially the same as in the first embodiment described above. The remaining thickness t2C on the groove bottom side of the second single plate 12B is 2 / of the thickness t1A of the first single plate 11B. 3 (about 6.7 / 10).
Also in the flooring 1D according to the present embodiment having the above-described configuration, there are substantially the same effects as those of the first embodiment described above.

次に、本発明に係る更に他の実施形態について、図面を参照しながら説明する。
図2(b)は、第6実施形態に係る床材の一例を模式的に示す図である。
なお、上記各実施形態との相違点について主に説明し、同様の構成については、同一の符号を付し、その説明を省略または簡略に説明する。
Next, still another embodiment according to the present invention will be described with reference to the drawings.
FIG.2 (b) is a figure which shows typically an example of the flooring which concerns on 6th Embodiment.
Note that differences from the above embodiments are mainly described, and the same components are denoted by the same reference numerals, and description thereof is omitted or simplified.

本実施形態に係る床材1Eは、図2(b)に示すように、合板基材層10E及び複数本の溝18Eの構成が、上記各実施形態とは主に異なる。
本実施形態では、合板基材層10Eの厚さ及び複数本の溝18Eの溝深さを、上記第5実施形態の合板基材層10Dの厚さ及び溝18Dの溝深さとそれぞれ同寸法としている。また、合板基材層10Eを、上記第5実施形態と概ね同様、5枚の単板11C,12C,13C,14C,15Cを積層した構成としている。また、第1単板11C及び第5単板15Cの厚さを、上記第5実施形態の第1単板11B及び第5単板15Bの厚さよりも大とし、第2単板12C及び第4単板14Cの厚さを、上記第5実施形態の第2単板12B及び第4単板14Bの厚さよりも小としている。また、第3単板13Cの厚さを、上記第5実施形態の第3単板13Bの厚さよりも大としている。
また、本実施形態では、複数本の溝18Eを、第2単板12Cの溝底側の残り厚さt2Dが第1単板11Cの厚さt1Bの7/13(約5.4/10)となるように設けた構成としている。
上記構成とされた本実施形態に係る床材1Eにおいても、上記した第1実施形態と略同様の効果を奏する。
As shown in FIG. 2B, the flooring 1E according to the present embodiment is mainly different from the above embodiments in the configuration of the plywood base material layer 10E and the plurality of grooves 18E.
In the present embodiment, the thickness of the plywood substrate layer 10E and the groove depth of the plurality of grooves 18E are the same as the thickness of the plywood substrate layer 10D and the groove depth of the grooves 18D of the fifth embodiment, respectively. Yes. Further, the plywood base material layer 10E has a configuration in which five single plates 11C, 12C, 13C, 14C, and 15C are laminated in substantially the same manner as in the fifth embodiment. Further, the thicknesses of the first single plate 11C and the fifth single plate 15C are made larger than the thicknesses of the first single plate 11B and the fifth single plate 15B of the fifth embodiment, and the second single plate 12C and the fourth single plate 15C. The thickness of the single plate 14C is smaller than the thickness of the second single plate 12B and the fourth single plate 14B of the fifth embodiment. Further, the thickness of the third single plate 13C is set larger than the thickness of the third single plate 13B of the fifth embodiment.
Further, in the present embodiment, the plurality of grooves 18E, the remaining thickness t2D on the groove bottom side of the second single plate 12C is 7/13 (about 5.4 / 10) of the thickness t1B of the first single plate 11C. It is set as the structure provided so that it may become.
Also in the flooring 1E according to the present embodiment having the above-described configuration, there are substantially the same effects as those in the first embodiment.

次に、本発明に係る更に他の実施形態について、図面を参照しながら説明する。
図2(c)は、第7実施形態に係る床材の一例を模式的に示す図である。
なお、上記各実施形態との相違点について主に説明し、同様の構成については、同一の符号を付し、その説明を省略または簡略に説明する。
Next, still another embodiment according to the present invention will be described with reference to the drawings.
FIG.2 (c) is a figure which shows typically an example of the flooring which concerns on 7th Embodiment.
Note that differences from the above embodiments are mainly described, and the same components are denoted by the same reference numerals, and description thereof is omitted or simplified.

本実施形態に係る床材1Fは、図2(c)に示すように、合板基材層10F及び複数本の溝18Fの構成が、上記各実施形態とは主に異なる。
本実施形態では、合板基材層10Fの厚さ及び複数本の溝18Fの溝深さを、上記第5実施形態の合板基材層10Dの厚さ及び溝18Dの溝深さとそれぞれ同寸法としている。また、合板基材層10Fを、上記第4実施形態と概ね同様、7枚の単板11D,12D,13D,14D,15D,16D,17Dを積層した構成としている。図例では、第1単板11D、第2単板12D、第4単板14D、第6単板16D及び第7単板17Dをそれぞれ同厚さとし、第3単板13Dと第5単板15Dとを同厚さとした例を示している。また、これら第3単板13D及び第5単板15Dの厚さを、これら以外の単板11D,12D,14D,16D,17Dの厚さよりも大とした例を示している。
また、本実施形態では、複数本の溝18Fを、上記第5実施形態と同様、第2単板12Dの溝底側の残り厚さt2Cが第1単板11Dの厚さt1Aの2/3(約6.7/10)となるように設けた構成としている。
上記構成とされた本実施形態に係る床材1Fにおいても、上記した第1実施形態と略同様の効果を奏する。
As shown in FIG. 2C, the flooring 1F according to the present embodiment is mainly different from the above embodiments in the configuration of the plywood base material layer 10F and the plurality of grooves 18F.
In the present embodiment, the thickness of the plywood substrate layer 10F and the groove depth of the plurality of grooves 18F are the same as the thickness of the plywood substrate layer 10D and the groove depth of the grooves 18D of the fifth embodiment, respectively. Yes. Further, the plywood base material layer 10F has a configuration in which seven single plates 11D, 12D, 13D, 14D, 15D, 16D, and 17D are laminated in substantially the same manner as in the fourth embodiment. In the illustrated example, the first single plate 11D, the second single plate 12D, the fourth single plate 14D, the sixth single plate 16D, and the seventh single plate 17D have the same thickness, and the third single plate 13D and the fifth single plate 15D. Are shown in the same thickness. Moreover, the example which made the thickness of these 3rd single board 13D and 5th single board 15D larger than the thickness of single board 11D, 12D, 14D, 16D, 17D other than these is shown.
Further, in the present embodiment, the plurality of grooves 18F are formed such that the remaining thickness t2C on the groove bottom side of the second single plate 12D is 2/3 of the thickness t1A of the first single plate 11D, as in the fifth embodiment. It is set as the structure provided so that it might become (about 6.7 / 10).
The flooring material 1F according to the present embodiment having the above configuration also has substantially the same effect as the first embodiment described above.

次に、本発明に係る更に他の実施形態について、図面を参照しながら説明する。
図2(d)は、第8実施形態に係る床材の一例を模式的に示す図である。
なお、上記各実施形態との相違点について主に説明し、同様の構成については、同一の符号を付し、その説明を省略または簡略に説明する。
Next, still another embodiment according to the present invention will be described with reference to the drawings.
FIG. 2D is a diagram schematically illustrating an example of the flooring according to the eighth embodiment.
Note that differences from the above embodiments are mainly described, and the same components are denoted by the same reference numerals, and description thereof is omitted or simplified.

本実施形態に係る床材1Gは、図2(d)に示すように、合板基材層10G及び複数本の溝18Gの構成が、上記各実施形態とは主に異なる。
本実施形態では、合板基材層10Gの厚さ及び複数本の溝18Gの溝深さを、上記第5実施形態の合板基材層10Dの厚さ及び溝18Dの溝深さとそれぞれ同寸法としている。また、合板基材層10Gを、3枚の単板11E,12E,13Eを積層したいわゆる3プライ合板としている。図例では、最表層側となる第1単板11Eと最裏層側となる第3単板13Eとを、上記同様、同厚さとし、第2単板12Eの厚さを、これら第1単板11E及び第3単板13Eの厚さよりも大とした例を示している。また、第1単板11E及び第3単板13Eの厚さを、上記第6実施形態の第1単板11C及び第5単板15Cの厚さと同厚さとした例を示している。
また、本実施形態では、複数本の溝18Gを、上記第6実施形態と同様、第2単板12Eの溝底側の残り厚さt2Dが第1単板11Eの厚さt1Bの7/13(約5.4/10)となるように設けた構成としている。
上記構成とされた本実施形態に係る床材1Gにおいても、上記した第1実施形態と略同様の効果を奏する。
As shown in FIG. 2D, the flooring 1G according to the present embodiment is mainly different from the above embodiments in the configuration of the plywood base material layer 10G and the plurality of grooves 18G.
In the present embodiment, the thickness of the plywood substrate layer 10G and the groove depth of the plurality of grooves 18G are the same as the thickness of the plywood substrate layer 10D and the groove depth of the grooves 18D of the fifth embodiment, respectively. Yes. The plywood substrate layer 10G is a so-called three-ply plywood in which three single plates 11E, 12E, and 13E are laminated. In the illustrated example, the first single plate 11E on the outermost layer side and the third single plate 13E on the rearmost layer side have the same thickness as described above, and the thickness of the second single plate 12E is set to the first single plate 11E. The example which made it larger than the thickness of the board 11E and the 3rd single board 13E is shown. Further, an example is shown in which the thicknesses of the first single plate 11E and the third single plate 13E are the same as the thicknesses of the first single plate 11C and the fifth single plate 15C of the sixth embodiment.
In the present embodiment, as in the sixth embodiment, the remaining thickness t2D on the groove bottom side of the second single plate 12E is 7/13 of the thickness t1B of the first single plate 11E. It is set as the structure provided so that it might become (about 5.4 / 10).
The flooring 1G according to the present embodiment having the above-described configuration also has substantially the same effect as that of the first embodiment described above.

なお、上記各実施形態に係る床材1,1A〜1Gにおける互いに異なる構成を、適宜、組み替えたり、組み合わせたりして適用するようにしてもよい。また、合板基材層10,10A〜10Gとしては、3枚や5枚、7枚の単板を積層した構成とされたものに限られず、9枚以上の奇数枚の単板を積層した構成とされたものとしてもよい。   In addition, you may make it apply the structure which mutually differs in the flooring materials 1 and 1A-1G which concern on each said embodiment suitably by combining or combining. Further, the plywood substrate layers 10 and 10A to 10G are not limited to the configuration in which three, five, or seven single plates are stacked, and a configuration in which nine or more odd number of single plates are stacked. It is good also as what was made.

次に、本発明に係る床材の実施例の一例と比較例とを、図3を参照して説明する。
なお、実施例1〜実施例4及び実施例9〜実施例12は、上記第1実施形態〜第4実施形態に係る床材1,1A〜1Cにそれぞれ相当する実施例で、実施例5〜実施例8は、上記第5実施形態〜第8実施形態に係る床材1D〜1Gにそれぞれ相当する実施例である。
各実施例1〜12及び各比較例1〜13では、いずれも、長さ寸法が895mm、幅寸法が142mmとされた床材とした。また、各床材の合板基材層の裏面側に、溝幅寸法が1.6mm程度、溝間寸法が11.6mm程度となるように、上記したような床材幅方向に延びる複数本の溝を床材長手方向に等間隔を空けて設けた構成とした。また、実施例1〜4及び比較例1〜13では、総厚さを9.0mmとし、実施例5〜8では、総厚さを5.8mmとし、実施例9〜12では、総厚さを9.3mmとした。
Next, an example of a flooring example according to the present invention and a comparative example will be described with reference to FIG.
Examples 1 to 4 and Examples 9 to 12 are examples corresponding to the flooring materials 1 and 1A to 1C according to the first to fourth embodiments, respectively. Example 8 is an example corresponding to the flooring materials 1D to 1G according to the fifth to eighth embodiments.
In each of Examples 1 to 12 and Comparative Examples 1 to 13, a flooring having a length dimension of 895 mm and a width dimension of 142 mm was used. In addition, on the back side of the plywood substrate layer of each flooring, a plurality of pieces extending in the flooring width direction as described above so that the groove width dimension is about 1.6 mm and the inter-groove dimension is about 11.6 mm. It was set as the structure which provided the groove | channel at equal intervals in the floor material longitudinal direction. In Examples 1 to 4 and Comparative Examples 1 to 13, the total thickness is 9.0 mm, in Examples 5 to 8, the total thickness is 5.8 mm, and in Examples 9 to 12, the total thickness is Was 9.3 mm.

また、実施例1〜12及び比較例1〜5では、表面化粧層として、0.2mm厚の突板(表面化粧材)と0.1mm厚のポリエチレンシート(防湿層)とを設けた構成とした。一方、比較例6〜13では、表面化粧層として、防湿層を設けずに、0.3mm厚の突板を設けた構成とした。
また、実施例5〜8では、合板基材層の裏面側に、基材層を構成する裏面側層として、0.1mm厚のポリエチレンシートと0.2mm厚の突板とを設けた構成とし、裏面側層を含んで複数本の溝を設けた構成とした。
また、実施例1〜8、比較例1,6〜9では、裏面シート(裏面層)として、0.2mm厚のオレフィン系樹脂シート(樹脂シート)を設けた構成とした。また、実施例9〜12では、裏面シート(裏面層)として、0.5mm厚のガラス繊維不織布(繊維シート)を設けた構成とした。一方、比較例2〜5,10〜13では、裏面シート(裏面層)を設けていない構成とした。
Moreover, in Examples 1-12 and Comparative Examples 1-5, it was set as the structure which provided the 0.2 mm-thick protrusion board (surface decoration material) and the 0.1-mm-thick polyethylene sheet (moisture-proof layer) as a surface decoration layer. . On the other hand, in Comparative Examples 6-13, it was set as the structure which provided the 0.3 mm-thick protrusion board without providing a moisture-proof layer as a surface decoration layer.
Moreover, in Examples 5-8, it was set as the structure which provided the 0.1 mm-thick polyethylene sheet and the 0.2-mm-thick protrusion as a back surface side layer which comprises a base material layer in the back surface side of a plywood base material layer, It was set as the structure which provided the several groove | channel including the back side layer.
In Examples 1 to 8 and Comparative Examples 1 and 6 to 9, a 0.2 mm-thick olefin resin sheet (resin sheet) was provided as the back sheet (back layer). Moreover, in Examples 9-12, it was set as the structure which provided the glass fiber nonwoven fabric (fiber sheet) of 0.5 mm thickness as a back surface sheet (back surface layer). On the other hand, in Comparative Examples 2-5, 10-13, it was set as the structure which has not provided the back surface sheet (back surface layer).

また、実施例1〜4、実施例9〜12及び比較例1〜13では、8.5mm厚のラワン合板を合板基材層とし、実施例5〜8では、5.0mm厚のラワン合板を合板基材層とした。
また、実施例1〜3、実施例9〜11及び比較例1〜13では、合板基材層を、5枚の単板を積層した構成とし、第1単板及び第5単板の厚さを1.0mm、第2単板及び第4単板の厚さを2.5mm、第3単板の厚さを1.5mmとした。実施例4及び実施例12では、合板基材層を、7枚の単板を積層した構成とし、第1単板及び第7単板の厚さを1.0mm、それ以外の単板の厚さを1.3mmとした。実施例5では、合板基材層を、5枚の単板を積層した構成とし、第1単板及び第5単板の厚さを0.60mm、第2単板及び第4単板の厚さを1.55mm、第3単板の厚さを0.7mmとした。実施例6では、合板基材層を、5枚の単板を積層した構成とし、第1単板及び第5単板の厚さを0.65mm、第2単板及び第4単板の厚さを1.3mm、第3単板の厚さを1.1mmとした。実施例7では、合板基材層を、7枚の単板を積層した構成とし、第3単板及び第5単板の厚さを1.0mm、それ以外の単板の厚さを0.6mmとした。実施例8では、合板基材層を、3枚の単板を積層した構成とし、第1単板及び第3単板の厚さを0.65mm、第2単板の厚さを3.7mmとした。
Moreover, in Examples 1-4, Examples 9-12, and Comparative Examples 1-13, the lauan plywood of 8.5 mm thickness was made into the plywood base material layer, and in examples 5-8, the lauan plywood of 5.0 mm thickness was used. A plywood substrate layer was obtained.
Moreover, in Examples 1-3, Examples 9-11, and Comparative Examples 1-13, it is set as the structure which laminated | stacked the single plate | board board | substrate layer of 5 sheets, and is the thickness of a 1st single plate and a 5th single plate. 1.0 mm, the thickness of the second single plate and the fourth single plate was 2.5 mm, and the thickness of the third single plate was 1.5 mm. In Example 4 and Example 12, the plywood substrate layer has a structure in which seven single plates are laminated, the thickness of the first single plate and the seventh single plate is 1.0 mm, and the thickness of the other single plate The thickness was set to 1.3 mm. In Example 5, the plywood substrate layer has a structure in which five single plates are laminated, the thickness of the first single plate and the fifth single plate is 0.60 mm, and the thickness of the second single plate and the fourth single plate. The thickness was 1.55 mm, and the thickness of the third single plate was 0.7 mm. In Example 6, the plywood substrate layer has a structure in which five single plates are laminated, the thickness of the first single plate and the fifth single plate is 0.65 mm, and the thickness of the second single plate and the fourth single plate. The thickness was 1.3 mm, and the thickness of the third single plate was 1.1 mm. In Example 7, the plywood substrate layer has a structure in which seven single plates are laminated, the thickness of the third single plate and the fifth single plate is 1.0 mm, and the thickness of the other single plates is 0.00. It was 6 mm. In Example 8, the plywood substrate layer has a structure in which three single plates are laminated, the thickness of the first single plate and the third single plate is 0.65 mm, and the thickness of the second single plate is 3.7 mm. It was.

また、実施例1,4,9,12及び比較例4,8,12では、第2単板の溝底側の残り厚さが0.7mmとなるように、溝深さが6.8mmの複数本の溝を合板基材層に設けた構成とした。また、実施例2,10及び比較例3,7,11では、第2単板の溝底側の残り厚さが1.2mmとなるように、溝深さが6.3mmの複数本の溝を合板基材層に設けた構成とした。また、実施例3,11及び比較例5,9,13では、第2単板の溝底側の残り厚さが0.2mmとなるように、溝深さが7.3mmの複数本の溝を合板基材層に設けた構成とした。また、実施例5,7では、第2単板の溝底側の残り厚さが0.4mmとなるように、溝深さが4.3mmの複数本の溝を、裏面側層を含んで合板基材層(基材層)に設けた構成とした。また、実施例6,8では、第2単板の溝底側の残り厚さが0.35mmとなるように、溝深さが4.3mmの複数本の溝を、裏面側層を含んで合板基材層(基材層)に設けた構成とした。また、比較例1,2,6,10では、第3単板の溝底側の残り厚さが1.2mmとなるように、溝深さが3.8mmの複数本の溝を合板基材層に設けた構成とした。   In Examples 1, 4, 9, and 12 and Comparative Examples 4, 8, and 12, the groove depth is 6.8 mm so that the remaining thickness on the groove bottom side of the second single plate is 0.7 mm. It was set as the structure which provided the several groove | channel in the plywood base material layer. In Examples 2 and 10 and Comparative Examples 3, 7, and 11, a plurality of grooves having a groove depth of 6.3 mm so that the remaining thickness on the groove bottom side of the second single plate is 1.2 mm. Was provided on the plywood substrate layer. In Examples 3 and 11 and Comparative Examples 5, 9, and 13, a plurality of grooves having a groove depth of 7.3 mm so that the remaining thickness on the groove bottom side of the second single plate is 0.2 mm. Was provided on the plywood substrate layer. Further, in Examples 5 and 7, a plurality of grooves having a groove depth of 4.3 mm including the back side layer so that the remaining thickness on the groove bottom side of the second single plate is 0.4 mm. It was set as the structure provided in the plywood base material layer (base material layer). Further, in Examples 6 and 8, a plurality of grooves having a groove depth of 4.3 mm including the back side layer so that the remaining thickness on the groove bottom side of the second single plate is 0.35 mm. It was set as the structure provided in the plywood base material layer (base material layer). In Comparative Examples 1, 2, 6, and 10, a plurality of grooves having a groove depth of 3.8 mm are formed on the plywood substrate so that the remaining thickness on the groove bottom side of the third single plate is 1.2 mm. It was set as the structure provided in the layer.

また、各実施例の床材及び各比較例の床材に対して、以下のような評価試験を行った。
<不陸追従性評価試験>
各実施例1〜12及び各比較例1〜13の床材を、2mm程度の段差が形成された床下地上に段差を跨ぐように施工し、目視観察及び床材上を歩行することで評価した。
結果は、図3に示すように、実施例1〜12及び比較例3〜5,7〜9,11〜13では、段差が略目立ず、がたつきが少なく、良好な結果であった。一方、比較例1,2,6,10では、段差が目立ち、がたつきが生じる結果となった。この結果から、合板基材層(基材層)の裏面側に、第2単板の層内に溝底が位置するように上記のような複数本の溝を設けた構成とすることで、不陸追従性に優れたものとなることが示された。
Moreover, the following evaluation tests were done with respect to the flooring of each Example and the flooring of each comparative example.
<Roughness follow-up evaluation test>
The flooring materials of Examples 1 to 12 and Comparative Examples 1 to 13 were constructed so as to straddle the step on the floor base on which a level difference of about 2 mm was formed, and evaluated by visual observation and walking on the flooring. .
As shown in FIG. 3, in Examples 1 to 12 and Comparative Examples 3 to 5, 7 to 9, and 11 to 13, the difference in level is substantially inconspicuous, and there is little backlash. . On the other hand, in Comparative Examples 1, 2, 6, and 10, the step was conspicuous and rattling occurred. From this result, on the back side of the plywood base material layer (base material layer), by providing a plurality of grooves as described above so that the groove bottom is located in the layer of the second single plate, It was shown that it was excellent in unevenness following ability.

<反り評価試験:常態>
各実施例1〜12及び各比較例1〜13の床材を、平常状態(常態)の雰囲気に近似させた温度25℃、湿度50%の雰囲気下に96時間放置し、反り量を測定した。反り量は、各実施例1〜12及び各比較例1〜13の床材の長手方向両端に対する長手方向中央部の厚さ方向への変位量とし、この反り量がプラスマイナス5mm以内を合格基準として判断した。
結果は、図3に示すように、実施例1〜12及び比較例1,2,4,6,8,10,12では、反り量がプラスマイナス5mm以内となり、良好な結果となった。また、実施例2,10では、他の良好なものと比べて、プラス側への反り量が大、つまり、長手方向中央部が突出する凸反りが僅かに目立つ結果となった。また、実施例3では、他の良好なものと比べて、マイナス側への反り量が大、つまり、長手方向中央部が凹む凹反りが僅かに目立つ結果となった。また、比較例3,7,11では、プラス側への反り量が5mm超となり、比較例5,9,13では、マイナス側への反り量が5mm超となり、反りが目立つ結果となった。
<Warpage evaluation test: normal state>
The flooring materials of Examples 1 to 12 and Comparative Examples 1 to 13 were allowed to stand for 96 hours in an atmosphere having a temperature of 25 ° C. and a humidity of 50% that approximated the atmosphere in a normal state (normal state), and the amount of warpage was measured. . The amount of warpage is the amount of displacement in the thickness direction of the central portion in the longitudinal direction relative to the longitudinal ends of the flooring materials of Examples 1 to 12 and Comparative Examples 1 to 13, and the warpage amount is within plus or minus 5 mm as a pass criterion. Judged as.
As shown in FIG. 3, in Examples 1 to 12 and Comparative Examples 1, 2, 4, 6, 8, 10, and 12, the amount of warpage was within ± 5 mm, and good results were obtained. Further, in Examples 2 and 10, the amount of warpage toward the plus side was larger than in other good cases, that is, the convex warpage in which the central portion in the longitudinal direction protruded was slightly conspicuous. Further, in Example 3, the amount of warpage to the minus side was larger than that of other good ones, that is, the concave warpage in which the central portion in the longitudinal direction was recessed was slightly conspicuous. Further, in Comparative Examples 3, 7, and 11, the amount of warpage toward the plus side was more than 5 mm, and in Comparative Examples 5, 9, and 13, the amount of warping toward the minus side was more than 5 mm.

<反り評価試験:加湿負荷>
各実施例1〜12及び各比較例1〜13の床材を、温度40℃、湿度90%の雰囲気下に96時間放置し、上記同様、反り量を測定した。
結果は、図3に示すように、実施例1〜12及び比較例1,2,6〜10では、反り量がプラスマイナス5mm以内となり、良好な結果となった。また、比較例3,4,11,12では、マイナス側への反り量が5mm超となり、比較例5,13では、プラス側への反り量が5mm超となり、反りが目立つ結果となった。この結果から、裏面シート(裏面層)を設けた構成とすることで、加湿負荷に対する反りを抑制できることが示された。
<Warpage evaluation test: humidification load>
The flooring materials of Examples 1 to 12 and Comparative Examples 1 to 13 were left in an atmosphere of a temperature of 40 ° C. and a humidity of 90% for 96 hours, and the amount of warpage was measured as described above.
As a result, as shown in FIG. 3, in Examples 1-12 and Comparative Examples 1, 2, 6-10, the amount of warpage was within plus or minus 5 mm, and good results were obtained. Further, in Comparative Examples 3, 4, 11, and 12, the amount of warpage to the minus side was more than 5 mm, and in Comparative Examples 5 and 13, the amount of warping to the plus side was more than 5 mm, resulting in conspicuous warpage. From this result, it was shown that the curvature with respect to humidification load can be suppressed by setting it as the structure which provided the back surface sheet (back surface layer).

<反り評価試験:乾燥負荷>
各実施例1〜12及び各比較例1〜13の床材を、温度50℃、湿度20%の雰囲気下に96時間放置し、上記同様、反り量を測定した。
結果は、図3に示すように、常態における反り評価試験と略同様な結果となった。つまり、実施例1〜12及び比較例1,2,4,6,8,10,12では、反り量がプラスマイナス5mm以内となり、良好な結果となった。また、実施例2,10では、他の良好なものと比べて、プラス側への反り量が大となり、実施例3では、他の良好なものと比べて、マイナス側への反り量が大となった。また、比較例3,7,11では、プラス側への反り量が5mm超となり、比較例5,9,13では、マイナス側への反り量が5mm超となり、反りが目立つ結果となった。この結果及び常態下の結果から、第2単板の溝底側の残り厚さを大きくし過ぎれば、第2単板の影響が大となり、凸反りし易くなる一方、第2単板の溝底側の残り厚さを小さくし過ぎれば、第1単板の影響が大となり、凹反りし易くなることが示された。
<Warpage evaluation test: Drying load>
The flooring materials of Examples 1 to 12 and Comparative Examples 1 to 13 were left in an atmosphere of a temperature of 50 ° C. and a humidity of 20% for 96 hours, and the amount of warpage was measured as described above.
As shown in FIG. 3, the result was substantially the same as the warp evaluation test in the normal state. That is, in Examples 1 to 12 and Comparative Examples 1, 2, 4, 6, 8, 10, and 12, the amount of warpage was within plus or minus 5 mm, and good results were obtained. Further, in Examples 2 and 10, the amount of warping to the plus side is large compared to other good ones, and in Example 3, the amount of warping to the minus side is large compared to other good ones. It became. Further, in Comparative Examples 3, 7, and 11, the amount of warpage toward the plus side was more than 5 mm, and in Comparative Examples 5, 9, and 13, the amount of warping toward the minus side was more than 5 mm. From this result and the result under normal conditions, if the remaining thickness on the groove bottom side of the second single plate is excessively increased, the influence of the second single plate becomes large, and the convex warpage is likely to occur. It was shown that if the remaining thickness on the bottom side is made too small, the influence of the first single plate becomes large, and the concave warp is likely to occur.

<反り評価試験:投光負荷>
各実施例1〜12及び各比較例1〜13の床材を、温度20℃、湿度50%の雰囲気下で、かつ各床材の表面に対して、日光照射に近似させた投光機によって150mmの高さから照射した状態で、8時間放置し、上記同様、反り量を測定した。
結果は、図3に示すように、実施例1〜12及び比較例1〜6,10では、反り量がプラスマイナス5mm以内となり、良好な結果となった。また、比較例7〜9,11〜13では、プラス側への反り量が5mm超となり、凸反りが目立つ結果となった。特に、比較例7,11では、プラス側への反り量が大きくなり、凸反りが大きく目立つ結果となった。この結果から、表面化粧層を、防湿層を含んだ構成とすることで、投光負荷(日光照射)に対する反りを抑制できることが示された。
<Warpage evaluation test: flood load>
By the floodlight which approximated the flooring of each Example 1-12 and each comparative example 1-13 to sunlight irradiation with respect to the surface of each flooring under the atmosphere of temperature 20 degreeC and humidity 50%. In the state irradiated from the height of 150 mm, it was left for 8 hours, and the amount of warpage was measured in the same manner as described above.
As shown in FIG. 3, in Examples 1 to 12 and Comparative Examples 1 to 6 and 10, the amount of warpage was within ± 5 mm, and good results were obtained. Moreover, in Comparative Examples 7-9 and 11-13, the amount of warpage to the plus side exceeded 5 mm, resulting in a conspicuous warpage. In particular, in Comparative Examples 7 and 11, the amount of warpage toward the plus side was large, and the convex warpage was greatly conspicuous. From this result, it was shown that the curvature with respect to a light projection load (sunlight irradiation) can be suppressed by setting the surface decorative layer to include a moisture-proof layer.

以上の結果から、実施例1〜12の各床材は、比較例1〜13と比較して、不陸追従性に優れ、また、常態並びに加湿負荷、乾燥負荷及び投光負荷のいずれにおいても反りが抑制されることが示され、良好な結果となった。また、実施例1,4〜8,9,11,12の各床材は、常態及び乾燥負荷に対する反りが実施例2,3,10よりも抑制されることが示され、特に良好な結果となった。   From the above results, each flooring material of Examples 1 to 12 is superior in uneven followability as compared with Comparative Examples 1 to 13, and in any of normal state, humidification load, drying load, and floodlight load. It was shown that the warpage was suppressed, and good results were obtained. Moreover, each flooring of Examples 1, 4-8, 9, 11, and 12 shows that the warpage with respect to the normal state and the drying load is suppressed more than in Examples 2, 3, and 10, with particularly good results. became.

1,1A〜1G 床材
10,10A〜10G 合板基材層
11,11A〜11E 第1単板(奇数層の単板、一枚目の単板)
12,12A〜12E 第2単板(偶数層の単板、二枚目の単板)
13,13A〜13E 第3単板(奇数層の単板)
14,14A〜14D 第4単板(偶数層の単板)
15,15A〜15D 第5単板(奇数層の単板)
16A,16D 第6単板(偶数層の単板)
17A,17D 第7単板(奇数層の単板)
18,18A〜18G 溝
20 表面化粧層
22 防湿層
23 裏面シート(裏面層)
t1,t1A,t1B 第1単板の厚さ
t2,t2A〜t2D 第2単板の溝底側の残り厚さ
2 床下地
1, 1A-1G Floor material 10, 10A-10G Plywood substrate layer 11, 11A-11E First single plate (odd layer single plate, first single plate)
12, 12A-12E Second single plate (even number of single plates, second single plate)
13, 13A-13E Third single plate (odd layer single plate)
14, 14A-14D Fourth single plate (even plate of single layer)
15, 15A-15D fifth single plate (odd layer single plate)
16A, 16D 6th single plate (single plate of even layer)
17A, 17D 7th veneer (odd layer veneer)
18, 18A-18G Groove 20 Surface decorative layer 22 Moisture-proof layer 23 Back sheet (back layer)
t1, t1A, t1B Thickness of the first single plate t2, t2A to t2D Remaining thickness of the second single plate on the groove bottom side 2 Floor base

Claims (5)

一方向に長尺状とされ、合板基材層の表面側に表面化粧層を設けた床材であって、
前記表面化粧層は、防湿層を含んだ構成とされており、
前記合板基材層は、床材長手方向に繊維方向を沿わせた奇数層の単板と床材幅方向に繊維方向を沿わせた偶数層の単板とからなる3枚以上で奇数枚の単板を積層した構成とされ、かつ、床材幅方向の全体に亘って延びるように裏面側において開口する複数本の溝が設けられた構成とされ、これら複数本の溝は、これら複数本の溝によって床材長手方向に区分される当該床材の床材長手方向に間隔を空けた部位同士が床下地の段差に追従して床材厚さ方向に相対的に変位可能なように、床材長手方向に間隔を空けて、かつ溝底が表面側から二枚目の単板の層内に位置するように設けられており、
前記合板基材層の裏面には、前記床材厚さ方向への変位に追従可能で、かつ前記合板基材層への裏面側からの吸湿を抑制し得る裏面シートが前記複数本の溝の裏面側開口を塞ぐように貼着されていることを特徴とする床材。
A flooring that is elongated in one direction and has a surface decorative layer on the surface side of the plywood substrate layer,
The surface decorative layer is configured to include a moisture-proof layer,
The plywood base material layer is composed of an odd number of three or more sheets consisting of an odd number of single plates along the fiber direction in the floor material longitudinal direction and an even number of single plates along the fiber direction in the floor material width direction. A single plate is laminated, and a plurality of grooves that are open on the back surface side are provided so as to extend over the entire floor width direction. In such a manner that the parts spaced apart in the floor material longitudinal direction of the floor material, which are divided in the floor material longitudinal direction by the grooves, can be relatively displaced in the floor material thickness direction following the steps of the floor base, It is provided so as to be spaced in the longitudinal direction of the flooring and so that the groove bottom is located in the layer of the second single plate from the surface side,
On the back surface of the plywood substrate layer, a back sheet capable of following displacement in the floor material thickness direction and capable of suppressing moisture absorption from the back surface side to the plywood substrate layer is formed of the plurality of grooves. A flooring material that is stuck so as to close the opening on the back side.
請求項1において、
前記裏面シートは、厚さが0.5mm以下の樹脂シートとされていることを特徴とする床材。
In claim 1,
The floor sheet, wherein the back sheet is a resin sheet having a thickness of 0.5 mm or less.
一方向に長尺状とされ、合板基材層の表面側に表面化粧層を設けた床材であって、
前記表面化粧層は、防湿層を含んだ構成とされており、
前記合板基材層は、床材長手方向に繊維方向を沿わせた奇数層の単板と床材幅方向に繊維方向を沿わせた偶数層の単板とからなる3枚以上で奇数枚の単板を積層した構成とされ、かつ、床材幅方向の全体に亘って延びるように裏面側において開口する複数本の溝が設けられた構成とされ、これら複数本の溝は、これら複数本の溝によって床材長手方向に区分される当該床材の床材長手方向に間隔を空けた部位同士が床下地の段差に追従して床材厚さ方向に相対的に変位可能なように、床材長手方向に間隔を空けて、かつ溝底が表面側から二枚目の単板の層内に位置するように設けられており、
前記合板基材層の裏面には、前記床材厚さ方向への変位に追従可能で、かつ前記複数本の溝の裏面側開口を拡開させる側への前記合板基材層の反りを拘束するように抑制し得る裏面層が設けられていることを特徴とする床材。
A flooring that is elongated in one direction and has a surface decorative layer on the surface side of the plywood substrate layer,
The surface decorative layer is configured to include a moisture-proof layer,
The plywood base material layer is composed of an odd number of three or more sheets consisting of an odd number of single plates along the fiber direction in the floor material longitudinal direction and an even number of single plates along the fiber direction in the floor material width direction. A single plate is laminated, and a plurality of grooves that are open on the back surface side are provided so as to extend over the entire floor width direction. In such a manner that the parts spaced apart in the floor material longitudinal direction of the floor material, which are divided in the floor material longitudinal direction by the grooves, can be relatively displaced in the floor material thickness direction following the steps of the floor base, It is provided so as to be spaced in the longitudinal direction of the flooring and so that the groove bottom is located in the layer of the second single plate from the surface side,
The back surface of the plywood base material layer can follow the displacement in the thickness direction of the floor material, and restrains the warp of the plywood base material layer to the side that widens the back side opening of the plurality of grooves. A flooring material comprising a back surface layer that can be restrained.
請求項3において、
前記裏面層は、厚さが1.0mm以下のガラス繊維含有シートとされていることを特徴とする床材。
In claim 3,
The flooring material, wherein the back layer is a glass fiber-containing sheet having a thickness of 1.0 mm or less.
請求項1乃至4のいずれか1項において、
前記複数本の溝は、前記二枚目の単板の溝底側の残り厚さが前記合板基材層の表面側から一枚目の単板の厚さの5/10〜7/10となるように設けられていることを特徴とする床材。
In any one of Claims 1 thru | or 4,
In the plurality of grooves, the remaining thickness on the groove bottom side of the second single plate is 5/10 to 7/10 of the thickness of the first single plate from the surface side of the plywood substrate layer. Floor material characterized by being provided.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118232558A (en) * 2024-05-24 2024-06-21 索恩格汽车电动***有限公司 Flat wire stator assembly and motor

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11182006A (en) * 1997-12-18 1999-07-06 Kawai Musical Instr Mfg Co Ltd Woody floor member
JP2000027418A (en) * 1998-07-07 2000-01-25 Noda Corp Floor material
JP2001323640A (en) * 2000-05-15 2001-11-22 Eidai Co Ltd Plate
JP2010001688A (en) * 2008-06-23 2010-01-07 Panasonic Electric Works Co Ltd Wooden floor material and method of manufacturing wooden floor material
JP2010242484A (en) * 2008-07-22 2010-10-28 Dainippon Printing Co Ltd Decorative material for flooring
JP2015017372A (en) * 2013-07-09 2015-01-29 朝日ウッドテック株式会社 Floor material
WO2015114569A1 (en) * 2014-01-31 2015-08-06 Belink S.A. Wooden floor and floor structure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11182006A (en) * 1997-12-18 1999-07-06 Kawai Musical Instr Mfg Co Ltd Woody floor member
JP2000027418A (en) * 1998-07-07 2000-01-25 Noda Corp Floor material
JP2001323640A (en) * 2000-05-15 2001-11-22 Eidai Co Ltd Plate
JP2010001688A (en) * 2008-06-23 2010-01-07 Panasonic Electric Works Co Ltd Wooden floor material and method of manufacturing wooden floor material
JP2010242484A (en) * 2008-07-22 2010-10-28 Dainippon Printing Co Ltd Decorative material for flooring
JP2015017372A (en) * 2013-07-09 2015-01-29 朝日ウッドテック株式会社 Floor material
WO2015114569A1 (en) * 2014-01-31 2015-08-06 Belink S.A. Wooden floor and floor structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118232558A (en) * 2024-05-24 2024-06-21 索恩格汽车电动***有限公司 Flat wire stator assembly and motor

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