JP7387133B2 - Laminated materials and methods for manufacturing laminated materials - Google Patents

Laminated materials and methods for manufacturing laminated materials Download PDF

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JP7387133B2
JP7387133B2 JP2019078122A JP2019078122A JP7387133B2 JP 7387133 B2 JP7387133 B2 JP 7387133B2 JP 2019078122 A JP2019078122 A JP 2019078122A JP 2019078122 A JP2019078122 A JP 2019078122A JP 7387133 B2 JP7387133 B2 JP 7387133B2
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輝彦 中川
雄大 坂井
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飛騨産業株式会社
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特許法第３０条第２項適用 展示会名：ミラノサローネ２０１８、開催日：平成３０年 ４月１７日～平成３０年 ４月２２日Article 30, Paragraph 2 of the Patent Act applies Exhibition name: Milano Salone 2018, Date: April 17, 2018 - April 22, 2018

本発明は、積層材及び積層材の製造方法に関し、特に、柾目材と板状の芯材との積層材及び積層材の製造方法に関する。 The present invention relates to a laminated material and a method of manufacturing the laminated material, and particularly to a laminated material of straight-grained materials and a plate-shaped core material, and a method of manufacturing the laminated material.

従来、比重が小さく柔らかいスギ等の針葉樹に対して圧縮加工を行い、家具や建材としての使用に耐え得る強度を持つ圧縮木材が製造されていた。この圧縮加工は、丸太材や板目材に対して行われることから、圧縮木材の表面には板目面が現れることとなり、針葉樹は柾目面の持つ直線的な木目が魅力であるところ、その魅力が活かされないことになっていた。 Conventionally, soft coniferous trees such as cedar with low specific gravity have been compressed to produce compressed wood that is strong enough to withstand use as furniture and building materials. Since this compression process is performed on logs and grained wood, a grained surface appears on the surface of the compressed wood. The charm was not to be utilized.

この問題を解決する発明が、特許文献１に開示されている。具体的には、特許文献１は、板目材を厚み方向に加熱圧縮して圧縮板目材１０２を得て、図９（ａ）の矢印で示すように、得られた圧縮板目材を厚み方向に所定の間隔をおいて複数箇所で切断して複数の圧縮板目材片１０４を得て、図９（ｂ）に示すように、圧縮板目材片１０４を９０°回転させて柾目面を上下面に露出させ（同図（ｃ）参照）、同図（ｄ）に示すように、圧縮板目材片１０４の板目面を相互に突き合わせて接着集成して集成圧縮柾目材１０６を得るというものである。 An invention that solves this problem is disclosed in Patent Document 1. Specifically, in Patent Document 1, a compressed grain material 102 is obtained by heating and compressing a grain material in the thickness direction, and the obtained compressed grain material is compressed as shown by the arrow in FIG. 9(a). A plurality of compressed grain pieces 104 are obtained by cutting at a plurality of locations at predetermined intervals in the thickness direction, and as shown in FIG. The surfaces of the compressed grained timber pieces 104 are exposed on the upper and lower surfaces (see FIG. 10(c)), and the grained surfaces of the compressed grained timber pieces 104 are butted against each other and bonded and laminated to form a compressed straight grained timber 106, as shown in FIG. It is to obtain.

特許文献１の集成圧縮柾目材１０６は、その上下の表面が全て柾目面となり、且つ、加熱圧縮により早材部が圧縮されて年輪間の距離が詰まっているために得られた上下面の木目は密接する年輪線が直線状に並行する緻密で魅力的な木目模様を呈するものとなる。また、圧縮により上下面には晩材部が密接する柾目面が現出していることから、強度も優れたものとなる。 In the compacted straight-grained timber 106 of Patent Document 1, all of its upper and lower surfaces are straight-grained, and the wood grain on the upper and lower surfaces is obtained because the earlywood portion is compressed by heat compression and the distance between the annual rings is narrowed. The wood exhibits a detailed and attractive wood grain pattern in which closely spaced annual growth rings line in parallel. In addition, since the compression creates a straight-grained surface on the upper and lower surfaces where the late wood portions are in close contact, it has excellent strength.

特許第６４３３８２７号公報Patent No. 6433827

しかしながら、加熱圧縮した圧縮木材は、その形状を固定化する処理が施されているといえども、水分と熱の作用により若干変形する可能性がある。特に、特許文献１の発明により得られた集成圧縮柾目材は、圧縮板目材片の板目面を相互に突き合わせて接着集成していることから、晩材部と晩材部の間の圧縮された早材部部分において蛇腹のように伸びやすく、寸法安定性に問題があることが発明者らの検討で明らかになってきた。 However, even though compressed wood that has been heated and compressed is treated to fix its shape, it may be slightly deformed by the action of moisture and heat. In particular, the laminated compressed straight-grained timber obtained by the invention of Patent Document 1 is bonded and laminated by butting the grain surfaces of the compressed timber pieces against each other, so that the compression between the latewood parts The inventors' studies have revealed that the early wood portion tends to stretch like a bellows, and there is a problem with dimensional stability.

すなわち、集成圧縮柾目材を用いて引き出しを作ると寸法変化により収容する家具にひっかかりが生じて出し入れが困難になり、開き扉の戸として用いた場合には寸法変化により戸枠に当接するようになり、扉が閉まりづらくなるおそれがある。さらに、テーブルの天板に用いた場合には、天板の寸法変化によりテーブルの脚部の伸長方向が変化し、テーブルのがたつきが生じるおそれもある。 In other words, if you make a drawer using laminated compressed straight-grained wood, the size change will cause the furniture to get caught, making it difficult to take it in and out.If you use it as a swinging door, the size change will cause the drawer to come into contact with the door frame. This may make it difficult to close the door. Furthermore, when used as a table top, the extension direction of the table legs changes due to changes in the dimensions of the top, which may cause the table to wobble.

本発明は、上記課題に鑑みてなされたものであり、その目的は、集成圧縮柾目材の緻密で魅力的な木目模様を露出させつつ、寸法安定性が向上した積層材及び積層材の製造方法を提供することにある。 The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a laminated timber and a method for manufacturing the laminated timber that have improved dimensional stability while exposing the dense and attractive grain pattern of laminated compressed straight-grained timber. Our goal is to provide the following.

上記目的を達成するための請求項１の発明に係る積層材は、板目材が厚み方向に加熱圧縮されてなる複数の圧縮板目材の板目面が相互に突き合わされて接着されてなる接着部を有する接着体として形成され、それぞれ連続する柾目面が露出する表面部及び裏面部を有すると共に、厚みが１ｍｍ超である板状の集成圧縮柾目材と、該集成圧縮柾目材の裏面部に表面が接着される板状の芯材と、を有することを特徴とする。 To achieve the above object, the laminated material according to the invention of claim 1 is obtained by heating and compressing the grain material in the thickness direction, and the grain surfaces of a plurality of compressed grain materials are butted against each other and bonded. A plate-shaped laminated compressed straight-grained material that is formed as a bonded body having an adhesive part, has a front surface portion and a back surface portion where continuous straight-grained surfaces are exposed, and has a thickness of more than 1 mm, and a back surface portion of the laminated compressed straight-grained material. and a plate-shaped core material whose surface is adhered to.

この構成によれば、集成圧縮柾目材がその幅方向に、すなわち、晩材部同士が離間する方向に伸長しようとするところ、芯材に接着固定されていることでその伸長が拘束され、集成圧縮柾目材の変形が抑制され、したがって、積層材は集成圧縮柾目材を用いているにもかかわらず寸法安定性が向上している。 According to this configuration, when the laminated compressed straight-grained timber tries to expand in its width direction, that is, in the direction in which the latewood parts are separated from each other, the expansion is restrained by being adhesively fixed to the core material. The deformation of the compressed straight-grained timber is suppressed, and therefore, the dimensional stability of the laminated material is improved despite the use of laminated compressed straight-grained timber.

さらに、積層材の少なくとも一方の面には集成圧縮柾目材の緻密で魅力的な木目模様が露出し、美観に優れるものとなっている。 Furthermore, the dense and attractive wood grain pattern of the compressed laminated straight-grained wood is exposed on at least one side of the laminated wood, resulting in an excellent aesthetic appearance.

請求項２に記載の発明は、請求項１に記載の積層材において、前記板状の芯材の裏面に前記集成圧縮柾目材とは異なる他の集成圧縮柾目材の表面部が接着されることで、前記芯材が前記集成圧縮柾目材と前記他の集成圧縮柾目材との間に挟まれた積層構造を有することを特徴とする。 The invention according to claim 2 is the laminate material according to claim 1, in which a surface portion of another compressed laminated straight-grained material different from the compressed laminated straight-grained material is adhered to the back surface of the plate-shaped core material. The core material has a laminated structure sandwiched between the compressed laminated straight-grained material and the other compressed laminated straight-grained material.

この構成によれば、板状の芯材一枚でその表面及び裏面に接着した２枚の板状の集成圧縮柾目材の変形を拘束することが可能となる。さらに、積層材の表側及び裏側双方の面に集成圧縮柾目材の緻密で魅力的な木目模様が露出し、さらに美観に優れるものとなっている。 According to this configuration, it is possible to restrain the deformation of the two plate-shaped compressed straight-grained laminated materials bonded to the front and back surfaces of the single plate-shaped core material. Furthermore, the dense and attractive wood grain pattern of the compressed laminated straight-grained wood is exposed on both the front and back sides of the laminated wood, making it even more aesthetically pleasing.

請求項３に係る発明は、請求項２に係る積層材において、前記芯材の側面に、前記集成圧縮柾目材で形成された枠体が固定されていることを特徴とする。 The invention according to claim 3 is characterized in that, in the laminated material according to claim 2, a frame body formed of the compressed laminated straight-grained material is fixed to a side surface of the core material.

この構成によれば、さらに側面に固定された、集成圧縮柾目材で形成された枠体の変形をも拘束することが出来る。そのうえ、表面、裏面、側面に柾目模様が現出した美観に優れる板材を提供することができる。 According to this configuration, it is also possible to restrain the deformation of the frame body fixed to the side surface and formed of compressed laminated straight-grained material. Moreover, it is possible to provide a board material with excellent aesthetic appearance and a straight-grained pattern appearing on the front, back, and side surfaces.

請求項４の発明に係る積層材の製造方法は、板目材を厚み方向に加熱圧縮して圧縮板目材を得る加熱圧縮工程と、該圧縮板目材の板目面を相互に突き合わせて接着集成させ、表面部及び裏面部に連続する柾目面が露出するとともに、厚みが１ｍｍ超である集成圧縮板目材を得る接着集成工程と、該集成圧縮柾目材の裏面部を板状の芯材の表面と接着して積層材を得る接着工程と、を有することを特徴とする。 The method for manufacturing a laminated material according to the invention of claim 4 includes a heating and compression step of heating and compressing a plate material in the thickness direction to obtain a compressed plate material, and a step of butting the grain surfaces of the compressed plate material against each other. Adhesive lamination process to obtain a laminated compressed board with a continuous straight grain surface exposed on the front and back sides and a thickness of more than 1 mm; It is characterized by having an adhesion step of adhering to the surface of the material to obtain a laminated material.

この構成によれば、接着集成工程で得られた集成圧縮柾目材はその幅方向に、すなわち、晩材部同士が離間する方向に伸長しようとするところ、接着工程で芯材に集成圧縮柾目材の裏面部が接着固定されていることでその伸長が拘束され、集成圧縮柾目材の変形が抑制され、したがって、得られた積層材は集成圧縮柾目材を用いているにもかかわらず寸法安定性が良好なものとなる。 According to this configuration, when the laminated compressed straight-grained timber obtained in the adhesive lamination process tries to expand in the width direction, that is, in the direction in which the latewood parts are separated from each other, the laminated compressed straight-grained timber obtained in the adhesive lamination process tries to elongate in the direction in which the latewood parts are separated from each other. The back side of the laminate is fixed with adhesive, which restricts its elongation and suppresses the deformation of the laminated compressed straight-grained material. Therefore, the resulting laminated material maintains dimensional stability even though it is made of laminated compressed straight-grained material. becomes good.

また、得られた積層材の少なくとも一方の面には集成圧縮柾目材の緻密で魅力的な木目模様が露出し、美観に優れるものとなっている。 Moreover, the dense and attractive wood grain pattern of the laminated compressed straight-grained wood is exposed on at least one side of the obtained laminated material, resulting in an excellent aesthetic appearance.

請求項５に記載の発明は、請求項４に記載の積層材の製造方法において、前記接着集成工程で少なくとも２枚の集成圧縮柾目材が得られ、前記接着工程で、前記集成圧縮柾目材の裏面部を板状の芯材の表面と接着し、前記集成圧縮柾目材とは異なる他の集成圧縮柾目材の表面部が前記板状の芯材の裏面と接着し、前記芯材が前記集成圧縮柾目材と前記他の集成圧縮柾目材との間に挟まれた積層構造を有する積層材が得られることを特徴とする。 The invention according to claim 5 is the method for manufacturing a laminated material according to claim 4, wherein at least two sheets of laminated compressed straight-grained materials are obtained in the adhesive lamination step, and in the bonding step, at least two sheets of laminated compressed straight-grained materials are obtained. The back surface portion is adhered to the surface of the plate-shaped core material, the surface portion of another compressed laminated straight-grain material different from the laminated compressed straight-grain material is adhered to the back surface of the plate-shaped core material, and the core material is bonded to the surface of the laminated compressed straight-grain material. The present invention is characterized in that a laminated material having a laminated structure sandwiched between a compressed straight-grained material and the other laminated compressed straight-grained material is obtained.

この構成によれば、板状の芯材一枚でその表面及び裏面に接着した２枚の板状の集成圧縮柾目材の変形を拘束することが可能となる。さらに、積層材の表側及び裏側双方の面に集成圧縮柾目材の緻密で魅力的な木目模様が露出し、さらに美観に優れるものとなっている。 According to this configuration, it is possible to restrain the deformation of the two plate-shaped compressed straight-grained laminated materials bonded to the front and back surfaces of the single plate-shaped core material. Furthermore, the dense and attractive wood grain pattern of the compressed laminated straight-grained wood is exposed on both the front and back sides of the laminated wood, making it even more aesthetically pleasing.

本発明によれば、集成圧縮柾目材がその幅方向に、すなわち、晩材部同士が離間する方向に伸長しようとするところ、芯材に接着固定されていることでその伸長が拘束され、集成圧縮柾目材の変形が抑制され、したがって、積層材は集成圧縮柾目材を用いているにもかかわらず寸法安定性が向上している。さらに、積層材の少なくとも一方の面には集成圧縮柾目材の緻密で魅力的な木目模様が露出し、美観に優れるものとなっている。 According to the present invention, when the laminated compressed straight-grained timber tries to expand in its width direction, that is, in the direction in which the latewood parts are separated from each other, the expansion is restrained by being adhesively fixed to the core material, and the laminated compressed straight-grained timber The deformation of the compressed straight-grained timber is suppressed, and therefore, the dimensional stability of the laminated material is improved despite the use of laminated compressed straight-grained timber. Furthermore, the dense and attractive wood grain pattern of the compressed laminated straight-grained wood is exposed on at least one side of the laminated wood, resulting in an excellent aesthetic appearance.

よって、積層材を家具等に取り入れた場合に、寸法変化による不具合が解消されると共に、美観に優れる家具等を提供することが可能となる。 Therefore, when the laminated material is incorporated into furniture, etc., problems caused by dimensional changes are eliminated, and it is possible to provide furniture, etc. with excellent aesthetic appearance.

（ａ）本発明の積層材の第１実施形態を示す斜視図であり、（ｂ）本発明の積層材の第１実施形態の変形例を示す斜視図である。(a) It is a perspective view showing a 1st embodiment of the laminate material of the present invention, and (b) It is a perspective view showing a modification of the 1st embodiment of the laminate material of the present invention. 本発明の積層材の第２実施形態を示す分解斜視図である。It is an exploded perspective view showing a 2nd embodiment of the laminated material of the present invention. 本発明の積層材の製造方法の加熱圧縮工程の説明図である。FIG. 3 is an explanatory diagram of a heating compression step of the method for manufacturing a laminate according to the present invention. 本発明の積層材の製造方法の接着工程の説明図である。FIG. 3 is an explanatory diagram of the adhesion process of the method for manufacturing a laminate according to the present invention. （ａ）環境試験前の、実施例に係る本発明の積層材の平面図、及び（ｂ）正面図である。(a) A plan view and (b) a front view of the laminate material of the present invention according to an example before an environmental test. （ａ）環境試験前の、実施例に係る本発明の積層材の幅の測定を説明する斜視図、及び（ｂ）環境試験後の、図５（ａ）のＶＩｂ－ＶＩｂ線断面部の端面図である。(a) A perspective view illustrating the measurement of the width of the laminate of the present invention according to the example before the environmental test, and (b) a cross-sectional section taken along line VI b - VI b in FIG. 5(a) after the environmental test. FIG. 環境試験後の、試験例１に係る積層材の空洞領域（芯材を有さない領域）側を示す図面代用写真であり、It is a photograph substituted for a drawing showing the cavity region (region without core material) side of the laminate material according to Test Example 1 after the environmental test, 環境試験後の、試験例２に係る積層材の芯材を有する領域側を示す図面代用写真である。It is a photograph substituted for a drawing showing the area side having a core material of the laminate material according to Test Example 2 after an environmental test. 従来の、集成圧縮柾目材の製造方法を説明する正面図である。It is a front view explaining the conventional manufacturing method of laminated compressed straight-grained lumber.

＜積層材＞
次に、本発明の積層材を、図１～図２を参照して詳細に説明する。図１は本発明の積層材の第１実施形態およびその変形例を示す斜視図、図２は本発明の積層材の第２実施形態を示す分解斜視図である。 <Laminated material>
Next, the laminated material of the present invention will be explained in detail with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing a first embodiment of the laminated material of the present invention and a modification thereof, and FIG. 2 is an exploded perspective view showing a second embodiment of the laminated material of the present invention.

図１（ａ）に示すように、本発明の積層材１０においては、板状の集成圧縮柾目材１２の裏面部１２ｂに板状の芯材１６の表面１６ａが接着されている。 As shown in FIG. 1(a), in the laminated material 10 of the present invention, the surface 16a of the plate-shaped core material 16 is bonded to the back surface portion 12b of the plate-shaped compressed straight-grained material 12.

集成圧縮柾目材１２は、板目材２（図３（ａ）参照）が厚み方向に加熱圧縮されてなる複数の圧縮板目材４の板目面４ａ（図４（ａ）参照）が相互に突き合わされて接着されてなる接着部１２ｃを有する接着体として形成され、それぞれ連続する柾目面が露出する表面部１２ａ及び裏面部１２ｂを有する（図４（ｂ）～（ｃ）参照）。 In the laminated compressed straight-grained material 12, the grain surfaces 4a (see FIG. 4(a)) of a plurality of compressed grained materials 4 are formed by heat-compressing the grained materials 2 (see FIG. 3(a)) in the thickness direction. It is formed as an adhesive body having an adhesive part 12c which is butted against and adhered to, and has a front part 12a and a back part 12b, each of which has a continuous straight-grained surface exposed (see FIGS. 4(b) to 4(c)).

集成圧縮柾目材１２の厚み（表面部１２ａと裏面部１２ｂとの間の厚み）は１ｍｍ超である。厚みが１ｍｍを超える場合に、集成圧縮柾目材１２がその晩材部同士が離間する方向に伸長する力が大きくなり、問題となるからである。 The thickness of the compressed straight-grained material 12 (thickness between the front surface portion 12a and the back surface portion 12b) is over 1 mm. This is because if the thickness exceeds 1 mm, the force with which the compressed laminated straight-grained timber 12 expands in the direction in which its latewood portions are separated from each other becomes large, which causes a problem.

また、芯材１６に接着させて集成圧縮柾目材１２の変形を拘束する観点から、集成圧縮柾目材１２の厚みは、芯材１６の厚みより小さいことが好ましく、芯材１６の厚みにもよるが、集成圧縮柾目材１２の厚みは、例えば、１ｍｍ超１２ｍｍ以下であり、好ましくは、２ｍｍ以上６ｍｍ以下である。 In addition, from the viewpoint of restraining the deformation of the compressed laminated straight-grained material 12 by adhering it to the core material 16, the thickness of the compressed laminated straight-grained material 12 is preferably smaller than the thickness of the core material 16, and it also depends on the thickness of the core material 16. However, the thickness of the compressed laminated straight-grained material 12 is, for example, more than 1 mm and less than 12 mm, preferably more than 2 mm and less than 6 mm.

集成圧縮柾目材１２の厚みが１２ｍｍを超える場合、芯材１６との接着面とは反対側の面である集成圧縮柾目材１２の表面部１２ａ側に歪が生じるおそれがある。 If the thickness of the compressed straight-grain laminated material 12 exceeds 12 mm, there is a risk that distortion may occur on the side of the surface portion 12a of the compressed laminated straight-grained material 12, which is the surface opposite to the surface bonded to the core material 16.

集成圧縮柾目材１２の材料となる板目材２は、針葉樹から木取りされたものである。本発明は、針葉樹の柾目面の持つ直線的な木目の魅力を活かすことを目的としており、この直線的な木目が、板目材２を厚み方向に圧縮することで緻密に並ぶこととなり、さらに魅力的なものとなるからである。針葉樹としては、スギ、マツ、ヒノキ、ツガ、トウヒ、モミノキ、カヤ、イチイ、アスナロ等が挙げられるが、これに限られるものではない。 The grained timber 2, which is the material of the compressed compressed straight-grained timber 12, is cut from a coniferous tree. The purpose of the present invention is to take advantage of the attractive straight grain of coniferous wood, and by compressing the grain material 2 in the thickness direction, this straight grain becomes densely arranged. This is because it becomes attractive. Examples of coniferous trees include, but are not limited to, cedar, pine, cypress, hemlock, spruce, fir tree, Japanese yew, Japanese yew, and Japanese cypress.

また、本発明において、板目材２とは、原木を年輪の接線方向に挽いた材であって、年輪の中心を外したいわゆる芯去り材をいうものとする。年輪の中心を有する芯持ち材を用いると、板目材の加熱圧縮時に芯付近の年輪が屈曲して割れが生じるおそれがあるからである。 Further, in the present invention, the grain material 2 is a material obtained by sawing raw wood in the tangential direction of the annual rings, and is a so-called core-removed material in which the center of the annual rings is removed. This is because if a core holding material having a center of annual rings is used, the annual rings near the core may be bent and cracks may occur when the grain material is heated and compressed.

また、板目材２には、柾目と板目の中間的な木取りをした追柾も含むものとする。ここで、柾目とは、丸太の中心に向かって挽いたときに現れる年輪が平行な木目をいい、そのように挽いて得られた材を柾目材という。 In addition, the grained material 2 includes a straight-grained material and a grained material intermediate between the straight-grained material and the board-grained material. Here, straight-grain refers to the grain of wood where the growth rings that appear when the log is sawn towards the center are parallel, and the wood obtained by sawing in this way is called straight-grain wood.

板目材２の圧縮率は、どのようなものであっても良いが、例えば、３０％以上８０％以下であり、木目の美観の観点から圧縮率は４５％以上であり、歩留りの観点から圧縮率は７０％以下であることが好ましい。 The compression ratio of the grain material 2 may be any value, but for example, it is 30% or more and 80% or less, and from the viewpoint of the aesthetic appearance of the wood grain, the compression ratio is 45% or more, and from the viewpoint of yield. The compression ratio is preferably 70% or less.

ここで、圧縮率は、以下の式
圧縮率（％）＝１００－（圧縮前の厚さ－圧縮後の厚さ）／圧縮前の厚さ×１００
で表される。 Here, the compression rate is calculated using the following formula: Compression rate (%) = 100 - (Thickness before compression - Thickness after compression) / Thickness before compression x 100
It is expressed as

圧縮率の測定は、どのような状態の圧縮板目材４に対して実施されてもよく、例えば、気乾状態（含水率１５％）の圧縮板目材４に対して実施されてもよい。 The measurement of compressibility may be performed on the compressed grain material 4 in any state, for example, it may be performed on the compressed grain material 4 in an air-dried state (moisture content 15%). .

芯材１６は、接着された集成圧縮柾目材１２の変形を拘束可能なものであればどのようなものであっても良い。芯材１６としては、例えば、ペーパーコア（好ましくは、ペーパーハニカムコア）、中密度繊維板（ＭＤＦ）、合板（薄く切った単板を繊維方向が直行するように互い違いに重ねて接着した木質材料）、単板積層材（薄く切った単板を繊維方向が平行となるように重ねて接着した木質材料、ＬＶＬともいう）、未圧縮のスギ、ヒノキ、カラマツ等の針葉樹材を使用することができる。 The core material 16 may be of any material as long as it can restrain the deformation of the bonded compressed straight-grained material 12. The core material 16 may be, for example, a paper core (preferably a paper honeycomb core), medium density fiberboard (MDF), plywood (a wood material made of thinly cut veneers alternately stacked and glued so that the fiber directions are perpendicular to each other). ), laminated veneer lumber (a wood material made by stacking and gluing thinly cut veneers so that the fiber directions are parallel, also called LVL), and uncompressed softwood materials such as cedar, cypress, and larch can be used. can.

積層材１０が他の部材と接合される部材として用いられる場合、ネジやダボによる接合強度を高める観点から、芯材１６は、広葉樹のみから製造されたＭＤＦ（いわゆるハードボード）であることが好ましい。 When the laminated material 10 is used as a member to be joined to other members, it is preferable that the core material 16 is MDF (so-called hardboard) made only from hardwood, from the viewpoint of increasing the joint strength with screws and dowels. .

芯材１６としてペーパーコアを用いる場合、ＪＩＳ Ａ６９３１－１９９４に基づいて測定された圧縮強さが２ｋｇｆ／ｃｍ２以上、湿潤圧縮強さが０．１ｋｇｆ／ｃｍ２以上、Ｗ（幅）方向のせん断強さが０．６ｋｇｆ／ｃｍ２以上、およびＬ（長さ）方向のせん断強さが１．０ｋｇｆ／ｃｍ２以上であることが好ましい。 When using a paper core as the core material 16, the compressive strength measured based on JIS A6931-1994 is 2 kgf/cm 2 or more, the wet compressive strength is 0.1 kgf/cm 2 or more, and the shear in the W (width) direction It is preferable that the strength is 0.6 kgf/cm 2 or more, and the shear strength in the L (length) direction is 1.0 kgf/cm 2 or more.

芯材１６の厚みは、集成圧縮柾目材１２の厚み以上であればよく、例えば、１２ｍｍ超６０ｍｍ以下であり、好ましくは、２０ｍｍ以上５０ｍｍ以下である。 The thickness of the core material 16 may be at least the thickness of the compressed laminated straight-grained material 12, for example, more than 12 mm and less than 60 mm, preferably more than 20 mm and less than 50 mm.

本実施の形態の積層材１０によれば、集成圧縮柾目材１２がその幅方向に、すなわち、晩材部同士が離間する方向に伸長しようとするところ、芯材１６に接着固定されていることでその伸長が拘束され、集成圧縮柾目材１２の変形が抑制され、したがって、積層材１０は集成圧縮柾目材１２を用いているにもかかわらず寸法安定性が向上している。さらに、積層材１０の表面（表面部１２ａ）には針葉樹の柾目特有の、特に、圧縮により緻密に並んだ直線的な木目が露出し、魅力的な外観を呈している。 According to the laminated material 10 of the present embodiment, the compressed straight-grained material 12 is adhesively fixed to the core material 16 when it tries to expand in the width direction, that is, in the direction in which the latewood portions are separated from each other. The elongation is restrained, and the deformation of the compressed laminated straight-grained material 12 is suppressed. Therefore, the dimensional stability of the laminated material 10 is improved even though the compressed laminated straight-grained material 12 is used. Further, on the surface (surface portion 12a) of the laminated material 10, the straight-grained wood grain characteristic of coniferous wood, in particular, the linear grains arranged closely due to compression are exposed, giving it an attractive appearance.

図１（ｂ）は、本発明の積層材１０の第１変形例を示す。本変形例において、図１（ａ）の例と共通する要素には同一の符号を付し、説明を省略する。 FIG. 1(b) shows a first modification of the laminated material 10 of the present invention. In this modified example, elements common to those in the example of FIG.

本変形例では、積層材１０は、芯材１６の裏面１６ｂに集成圧縮柾目材１２（１２－１）とは異なる他の集成圧縮柾目材１２（１２－２）の表面部１２－２ａが接着されることで、芯材１６が集成圧縮柾目材１２－１と他の集成圧縮柾目材１２－２との間に挟まれた積層構造を有する。 In this modification, in the laminated material 10, the surface portion 12-2a of the compressed laminated straight-grained material 12 (12-2), which is different from the compressed laminated straight-grained material 12 (12-1), is adhered to the back surface 16b of the core material 16. As a result, the core material 16 has a laminated structure sandwiched between the laminated compressed straight-grained material 12-1 and the other compressed laminated straight-grained material 12-2.

これによれば、１枚の板状の芯材１６でその表面１６ａ及び裏面１６ｂに接着した２枚の板状の集成圧縮柾目材１２－１，１２－２の変形を拘束することが可能となる。同時に、積層材１０の上下面に緻密に並んだ直線的な木目が露出し、さらに魅力的な外観を呈する積層材となっている。 According to this, it is possible to restrain the deformation of the two plate-shaped compressed straight-grained materials 12-1 and 12-2 bonded to the front surface 16a and back surface 16b of the one plate-shaped core material 16. Become. At the same time, the densely arranged linear wood grains are exposed on the upper and lower surfaces of the laminated material 10, resulting in a laminated material with a more attractive appearance.

図２は、第２実施形態に係る本発明の積層材２０を示す。本実施形態において、第１実施形態と共通する要素には同一の符号を付し、説明を省略する。 FIG. 2 shows a laminate 20 of the present invention according to a second embodiment. In this embodiment, elements common to those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

本実施形態に係る積層材２０は、芯材２２として具体的にペーパーハニカムコアが使用され、芯材２２の側面に、集成圧縮柾目材１２（１２－３）で形成された枠体２４が接着固定されている点において上記第１実施形態の変形例と異なる。 In the laminated material 20 according to this embodiment, a paper honeycomb core is specifically used as the core material 22, and a frame body 24 formed of compressed laminated straight-grained material 12 (12-3) is adhered to the side surface of the core material 22. This differs from the modification of the first embodiment in that it is fixed.

本実施形態において、積層材２０は、テーブルの天板用途である。 In this embodiment, the laminated material 20 is used as a table top.

枠体２４は、図２に示すように、積層材２０の縦方向（短手方向）に延在する縦枠２４ａ，２４ａ及び横方向（長手方向）に延在する横枠２４ｂ，２４ｂで形成される長矩形の枠体であり、テーブルの足と接合される部位には、２本のホワイトオーク製の仕切り材２６，２６が横枠２４ｂ，２４ｂに架け渡されている。 As shown in FIG. 2, the frame body 24 is formed of vertical frames 24a, 24a extending in the vertical direction (lateral direction) of the laminated material 20 and horizontal frames 24b, 24b extending in the horizontal direction (longitudinal direction). It is a long rectangular frame body, and two white oak partition members 26, 26 are spanned over horizontal frames 24b, 24b at the portions to be joined to the legs of the table.

仕切り材２６，２６の位置は、接合部位に合わせて任意に設定することができ、ホワイトオーク製に限られず、ネジやダボによる接合に適する所定の強度を有する木材を適宜に用いることができる。ここで、所定の強度を有する木材は、気乾比重０．６以上、好ましくは０．７以上の木材であり、圧縮木材であってもよい。なお、特に他の部材と接合する必要が無い場合には、仕切り材２６、２６が無くてもよい。 The positions of the partition members 26, 26 can be arbitrarily set according to the joining area, and the material is not limited to white oak, and any wood having a predetermined strength suitable for joining with screws or dowels can be used as appropriate. Here, the wood having a predetermined strength is wood with an air-dry specific gravity of 0.6 or more, preferably 0.7 or more, and may be compressed wood. In addition, especially when there is no need to join with other members, the partition members 26, 26 may not be provided.

芯材２２は、枠体２４および仕切り材２６により区画された領域に、側面が枠体２４の側面及び仕切り材２６の側面に密着するように挿入される。 The core material 22 is inserted into a region defined by the frame body 24 and the partition material 26 so that its side surface is in close contact with the side surface of the frame body 24 and the side surface of the partition material 26.

芯材２２の側面には接着剤が塗布され、枠体２４の側面および仕切り材２６の側面とそれぞれ接着固定されている。 Adhesive is applied to the side surface of the core material 22, and the core material 22 is adhesively fixed to the side surface of the frame body 24 and the side surface of the partition material 26, respectively.

接着剤としては、公知の水系接着剤を用いることができる。例えば、水性高分子イソシアネート系接着剤、酢酸ビニル樹脂系接着剤、尿素を主成分とする接着剤、エポキシ樹脂を主成分とする接着剤、フェノール樹脂を主成分とする接着剤、合成ゴム系接着剤等、種々の接着剤を用いることができる。 As the adhesive, a known water-based adhesive can be used. For example, water-based polymeric isocyanate adhesives, vinyl acetate resin adhesives, urea-based adhesives, epoxy resin-based adhesives, phenolic resin-based adhesives, synthetic rubber adhesives, etc. Various adhesives can be used, such as adhesives.

なお、芯材２２の側面と枠体２４との固定の態様は、接着剤によるものに限らず、例えば、建築用ステープラーを用いた固定であってもよい。 Note that the manner in which the side surface of the core material 22 and the frame body 24 are fixed is not limited to adhesive, and may be fixed using a construction stapler, for example.

芯材２２と集成圧縮柾目材１２－１の、および芯材２２と集成圧縮柾目材１２－２の接着の態様については、上記図１（ｂ）の積層材１０と変わるところが無いので、その説明を省略する。 The manner of adhesion between the core material 22 and the laminated compressed straight-grained material 12-1 and between the core material 22 and the laminated compressed straight-grained material 12-2 is the same as that of the laminated material 10 shown in FIG. 1(b) above, so we will explain them below. omitted.

本実施形態に係る積層材２０によれば、芯材２２の側面に、集成圧縮柾目材１２－３で形成された枠体２４が接着固定されているので、この枠体２４の変形をも拘束することができる。同時に、長矩形の積層材２０の上面、下面、正面、左側面、右側面、背面の六面全てが集成圧縮柾目材１２で覆われているので、全面に緻密に並んだ直線的な木目が露出した、さらに魅力的な外観を呈する積層材となっている。 According to the laminated material 20 according to the present embodiment, the frame body 24 formed of the laminated compressed straight-grained material 12-3 is adhesively fixed to the side surface of the core material 22, so that deformation of the frame body 24 is also restrained. can do. At the same time, all six sides of the rectangular laminated wood 20, including the top, bottom, front, left side, right side, and back side, are covered with the compressed laminated straight-grained wood 12, so that the entire surface has densely arranged linear wood grains. The laminate is exposed and has a more attractive appearance.

＜積層材の製造方法＞
次に、本発明の積層材の製造方法について、図３及び図４を参照して詳細に説明する。図３は本発明の積層材の製造方法の加熱圧縮工程の説明図、図４は本発明の積層材の製造方法の接着工程の説明図である。 <Manufacturing method of laminated material>
Next, the method for manufacturing a laminate according to the present invention will be described in detail with reference to FIGS. 3 and 4. FIG. 3 is an explanatory diagram of the heating compression step of the method for producing a laminate according to the present invention, and FIG. 4 is an explanatory diagram of the adhesion step of the method for producing a laminate according to the present invention.

本発明の積層材の製造方法は、加熱圧縮工程と、接着集成工程と、接着工程と、を有する。 The method for manufacturing a laminate according to the present invention includes a heating compression step, an adhesive assembly step, and an adhesion step.

［１．加熱圧縮工程］
図３に示すように、本工程では、板目材２を厚み方向に加熱圧縮して圧縮板目材４を得る。加熱圧縮工程は、例えば、板目材２の蒸煮による加熱軟化処理、加熱固定処理、およびにより行なう。 [1. Heat compression process]
As shown in FIG. 3, in this step, the grain material 2 is heated and compressed in the thickness direction to obtain a compressed grain material 4. The heat compression process is performed by, for example, heat softening treatment by steaming the grain material 2, heat fixing treatment, and so on.

１－１．加熱軟化処理
まず、板目材２を蒸煮して軟化させる。蒸煮は、例えば、蒸煮缶を用いて行うことができる。蒸煮時間は、例えば、８０℃～１２０℃で、３０～６０分程度の時間で行うことができる。蒸煮後の板目材２は、例えば、図３の圧縮装置５０を用いて加熱工程処理が施される。 1-1. Heat Softening Treatment First, the grain material 2 is steamed and softened. Steaming can be performed using, for example, a steamer. The steaming time can be, for example, at 80° C. to 120° C. for about 30 to 60 minutes. The steamed grain material 2 is subjected to a heating process using, for example, the compression device 50 shown in FIG. 3 .

圧縮装置５０は、同図に示すように、内部に木材が載置される底部５２ａを有すると共に天面が開放された箱状の下型５２と下型５２の蓋部を構成する板状の上型５４とからなる圧縮型５６を備える基本構成を有する。上型５４は、下型５２に対して接離する方向（矢印１１０方向）に移動可能であり、下型５２に対して当接すると圧縮型５６は閉状態となり、密閉された型内空間５８が構成される。尚、下型５２の上縁部に設けられた溝部にはＯリング５３が嵌め込まれており、Ｏリング５３が上型５４に対して密着することで型内空間５８は密閉される。 As shown in the figure, the compression device 50 has a bottom part 52a on which wood is placed, a box-shaped lower mold 52 with an open top surface, and a plate-shaped lower mold 52 constituting the lid of the lower mold 52. It has a basic configuration including a compression mold 56 consisting of an upper mold 54. The upper mold 54 is movable in the direction of coming into contact with and separating from the lower mold 52 (in the direction of arrow 110), and when it comes into contact with the lower mold 52, the compression mold 56 is in a closed state, and the sealed mold space 58 is closed. is configured. Note that an O-ring 53 is fitted into a groove provided at the upper edge of the lower mold 52, and as the O-ring 53 comes into close contact with the upper mold 54, the mold interior space 58 is sealed.

上型５４には、図示しない蒸気を流通させる管路と冷却水を流通させる管路が設けられており、下型５２には、図示しない蒸気を流通させる管路と冷却水を流通させる管路が設けられている。さらに、下型５２には、図示しない型内空間５８に蒸気を導入するための管路及び型内空間５８から蒸気を排出するための管路、及び型内空間５８内の水を排出するための管路が設けられている。 The upper mold 54 is provided with a pipe (not shown) through which steam flows and a pipe through which cooling water flows, and the lower mold 52 is provided with a pipe (not shown) through which steam flows and a pipe through which cooling water flows. is provided. Further, the lower mold 52 includes a pipe line (not shown) for introducing steam into the mold space 58, a pipe pipe for discharging the steam from the mold space 58, and a pipe pipe for discharging water in the mold space 58. A number of conduits are provided.

蒸煮後の板目材２は、図３の圧縮型５６の下型５２の底部５２ａに板目面が当接するようにして載置される。 After steaming, the grained material 2 is placed so that the grain surface is in contact with the bottom portion 52a of the lower mold 52 of the compression mold 56 shown in FIG.

次に、図３（ａ）に示すように、上型５４を下型５２に近接する方向に移動させ、上型５４の下面を板目材２の上側の表面部２ａに当接させる。 Next, as shown in FIG. 3A, the upper mold 54 is moved in a direction approaching the lower mold 52, and the lower surface of the upper mold 54 is brought into contact with the upper surface portion 2a of the grain material 2.

そして、板目材２の上下の表面部２ａ及び２ｂに上型５４及び下型５２を当接させた状態で、上型５４及び下型５２に蒸気を送りこみ、徐々に上型５４及び下型５２の温度を昇温させる。昇温は、常温付近（約１５～２０℃）から約１１０～１３０℃の温度まで行われ、その温度で一定に維持される。圧縮装置５０による板目材２の加熱軟化処理は、昇温開始から約１５～２５分程度で行われる。以上の処理により、板目材２が加熱軟化される。 Then, with the upper mold 54 and the lower mold 52 in contact with the upper and lower surfaces 2a and 2b of the plate material 2, steam is fed into the upper mold 54 and the lower mold 52, and gradually the upper mold 54 and the lower mold 52 are brought into contact with each other. The temperature of the mold 52 is raised. The temperature is raised from around room temperature (approximately 15 to 20°C) to approximately 110 to 130°C, and is maintained constant at that temperature. The heating and softening treatment of the grain material 2 by the compression device 50 is performed approximately 15 to 25 minutes after the start of temperature rise. Through the above processing, the grain material 2 is heated and softened.

１－２．加熱固定処理
圧縮装置５０による板目材２の加熱軟化処理後、図３（ｂ）に示すように、上型５４を下型５２に当接するまで移動させ、板目材２を厚み方向に、すなわち、年輪の積層方向に圧縮する。このとき、型内空間５８に蒸気を導入／排出するための管路、及び型内空間５８内の水を排出するための管路の弁を閉じることで、型内空間５８を完全な密閉空間とする。この状態で、上型５４及び下型５２を約１５０℃～１８０℃までさらに昇温させ、昇温開始から約７０～１２０分程度高温状態で維持する。 1-2. Heat-fixing treatment After the heating and softening treatment of the grain material 2 by the compression device 50, as shown in FIG. That is, it is compressed in the stacking direction of annual rings. At this time, by closing the valves of the pipes for introducing and discharging steam into and out of the mold space 58 and the pipes for discharging water in the mold space 58, the mold space 58 is completely sealed. shall be. In this state, the temperature of the upper mold 54 and the lower mold 52 is further raised to about 150° C. to 180° C., and the high temperature state is maintained for about 70 to 120 minutes from the start of the heating.

すると、型内空間５８における空気の熱膨張及び板目材２の水分の蒸発による水蒸気の発生によって型内空間の圧力が上昇し、この上昇圧力下で圧縮された木材に高温水蒸気処理が施されることとなる。これにより、板目材２の内部に蓄積された応力が短時間のうちに著しく緩和されて圧縮形状が固定され、圧縮板目材４が得られる。上記板目材２からの水分の蒸発だけでは水蒸気量が足りない場合、及び型内空間５８の圧力が低い場合、型内空間５８に蒸気を導入するための管路の弁を開き、蒸気量及び圧力を増大させることができ、逆に圧力が高い場合には型内空間５８に蒸気を排出するための管路の弁を若干開き、圧力を低下させる調節を行うことができる。 Then, the pressure in the mold space increases due to the thermal expansion of the air in the mold space 58 and the generation of water vapor due to the evaporation of water in the grain material 2, and the compressed wood is subjected to high-temperature steam treatment under this increased pressure. The Rukoto. As a result, the stress accumulated inside the grain material 2 is significantly relaxed in a short time, the compressed shape is fixed, and the compressed grain material 4 is obtained. When the amount of water vapor is insufficient due to the evaporation of water from the grain material 2, or when the pressure in the mold space 58 is low, the valve of the pipe line for introducing steam into the mold space 58 is opened, and the amount of steam is On the other hand, if the pressure is high, the valve of the conduit for discharging steam into the mold space 58 can be slightly opened to lower the pressure.

なお、型内空間５８の圧力は、適宜に圧力計を設けることでモニターすることができる。 Note that the pressure in the mold interior space 58 can be monitored by appropriately providing a pressure gauge.

また、板目材２の圧縮率は、圧縮前の板目材２の厚さやＯリング５３の高さ、下型５２の底部５２ａに載置可能な平らな金属板（図示省略）によって調節可能であり、針葉樹の板目材であれば最大約７０％程度まで行うことができる。 In addition, the compression ratio of the grain material 2 can be adjusted by the thickness of the grain material 2 before compression, the height of the O-ring 53, and a flat metal plate (not shown) that can be placed on the bottom 52a of the lower mold 52. This can be done up to about 70% for softwood planks.

１－３．冷却処理
その後、上型５４及び下型５２の温度を約２０～４０℃まで低下させ、３０分～６０分間維持して圧縮形状が固定された圧縮板目材４を冷却する。冷却は、型内空間５８の蒸気を排出するための管路の弁を開けて型内空間５８から蒸気を排出すると共に、冷却水を流通させる管路を介して冷却水を上型５４及び下型５２内に流通させることにより行われる。その後、上型５４を下型５２に対して離反する方向、すなわち、矢印１２０方向に移動させる。 1-3. Cooling Treatment After that, the temperature of the upper mold 54 and the lower mold 52 is lowered to about 20 to 40° C. and maintained for 30 to 60 minutes to cool the compressed plate material 4 whose compressed shape is fixed. Cooling is carried out by opening the valve of the pipe for discharging the steam in the mold interior space 58 to discharge the steam from the mold interior space 58, and at the same time, cooling water is supplied to the upper mold 54 and the lower mold through the cooling water passage. This is done by allowing the mixture to flow through the mold 52. Thereafter, the upper mold 54 is moved in a direction away from the lower mold 52, that is, in the direction of arrow 120.

なお、上述のとおり、加熱圧縮工程は蒸煮缶及び圧縮装置５０を用い、加熱軟化処理後の加熱固定処理により行われているが、これに限られるものではない。木材を加熱して圧縮固定し得る処理であれば、任意の装置を用いて行うことができる。例えば、高温高圧容器内で水蒸気と高周波により加熱軟化させた後、圧縮成形して当該圧縮された形状を高温高圧雰囲気内において固定化してもよい。 Note that, as described above, the heat compression step is performed using a steamer and the compression device 50, and is performed by heat softening treatment followed by heat fixing treatment, but is not limited thereto. Any treatment that can heat and compress wood to fix it can be carried out using any device. For example, the material may be heated and softened in a high-temperature, high-pressure container using water vapor and high-frequency waves, and then compression molded to fix the compressed shape in a high-temperature, high-pressure atmosphere.

また、平版プレス・ロールプレスを用いたドライングセットを行い、その後に熱処理、高圧水蒸気処理、高周波あるいはマイクロ波加熱処理、化学処理、樹脂含浸処理等の固定化処理を施すことも可能である（以上、加熱圧縮工程）。 It is also possible to perform a drying set using a lithographic press or roll press, and then perform a fixing treatment such as heat treatment, high-pressure steam treatment, high frequency or microwave heat treatment, chemical treatment, resin impregnation treatment, etc. (see above). , heating compression process).

［２．接着集成工程］
本工程では、１．加熱圧縮工程で得られた複数の圧縮板目材４の板目面４ａを相互に突き合わせて接着集成させる。例えば、図４（ａ）に示すように、複数の圧縮板目材４の板目面４ａを相互に突き合わせて接着させる。板目面４ａ相互の接着は、例えば、高周波接着により行うことができる。すなわち、板目面４ａに上述の公知の水系接着剤を塗布し、図示左右からプレスして圧力をかけ、その状態で電圧をかけることで水分子が存在する接着剤の部位の電圧が高くなり、この高電圧によって接着剤を熱硬化させるものである。なお、この方法に限らず、各圧縮板目材４を相互に接着可能な方法であればどのような方法であってもよい。 [2. Adhesive assembly process]
In this process, 1. The grain surfaces 4a of the plurality of compressed grain materials 4 obtained in the heat compression step are butted against each other and bonded together. For example, as shown in FIG. 4(a), the grain surfaces 4a of a plurality of compressed grain materials 4 are butted against each other and bonded together. The mutual adhesion of the grain surfaces 4a can be performed, for example, by high frequency adhesion. That is, the above-mentioned known water-based adhesive is applied to the grain surface 4a, pressure is applied by pressing from the left and right sides as shown in the figure, and a voltage is applied in this state, thereby increasing the voltage at the portion of the adhesive where water molecules are present. , the adhesive is thermally cured by this high voltage. Note that this method is not limited to this method, and any method may be used as long as it is possible to bond the compressed planks 4 to each other.

これにより、図４（ｂ）に示すように、表面部１２ａ及び裏面部１２ｂに連続する柾目面が露出するとともに、接着部１２ｃを有する集成圧縮柾目材１２を得ることが出来る。接着後の圧縮板目材４間で段差が生じる場合は、適宜に表面部を削って面一な表面部に修正すればよい。 As a result, as shown in FIG. 4(b), it is possible to obtain a compressed straight-grain laminated material 12 having a straight-grained surface continuous to the front surface portion 12a and back surface portion 12b exposed and having an adhesive portion 12c. If a difference in level occurs between the compressed grains 4 after bonding, the surface portions may be appropriately shaved to make the surface portions flush.

また、集成圧縮柾目材１２の厚みは、１ｍｍ超である範囲で適宜に調整することができる。例えば、水平バンドソーを用いて図４（ｃ）に示す破線の部位で集成圧縮柾目材１２を切断することで、所望の厚みの集成圧縮柾目材１２を得ることができる。 Further, the thickness of the compressed laminated straight-grained material 12 can be adjusted as appropriate within a range of more than 1 mm. For example, the compressed laminated straight-grained material 12 having a desired thickness can be obtained by cutting the compressed laminated straight-grained material 12 at the portion indicated by the broken line shown in FIG. 4(c) using a horizontal band saw.

さらに、圧縮板目材４の接着集成は、上記の方法に限られるものではなく、従来公知の方法を選択することができる。例えば、図７の方法を参考に、得られた圧縮板目材４を厚み方向に所定の間隔をおいて複数個所で切断して複数の圧縮板目材片を得て（図７（ａ）～（ｂ）参照）、圧縮板目材片を９０°回転させて柾目面を上下面に露出させ（図７（ｂ）～（ｃ）参照）、圧縮板目材片の板目面を相互に突き合わせて接着集成して集成圧縮柾目材１２（図７（ｄ）参照）を得ることとしてもよい（以上、接着修正工程）。 Furthermore, the adhesive assembly of the compressed board material 4 is not limited to the above-mentioned method, and any conventionally known method can be selected. For example, referring to the method shown in FIG. 7, the obtained compressed grain material 4 is cut at a plurality of locations at predetermined intervals in the thickness direction to obtain a plurality of compressed grain material pieces (see FIG. 7(a)). (see Figures 7(b) to (b)), rotate the compressed board pieces by 90 degrees to expose the straight-grained surfaces on the upper and lower surfaces (see Figures 7(b) to (c)), and then It is also possible to obtain the compressed straight-grain laminated material 12 (see FIG. 7(d)) by bonding and assembling the pieces against each other (the above is the adhesion correction process).

［３．接着工程］
本工程では、２．接着集成工程で得られた集成圧縮柾目材１２の裏面部１２ｂを板状の芯材１６の表面１６ａと接着して積層材１０（図１（ａ）参照）を得る。集成圧縮柾目材１２の裏面部１２ｂと芯材１６の表面１６ａとの接着は、接着剤（例えば、上記公知の水系接着剤）を用いることができる。 [3. Adhesion process]
In this process, 2. The back side 12b of the compressed straight-grain laminated material 12 obtained in the adhesive lamination step is adhered to the front surface 16a of the plate-shaped core material 16 to obtain a laminated material 10 (see FIG. 1(a)). An adhesive (for example, the above-mentioned known water-based adhesive) can be used to bond the back surface portion 12b of the compressed straight-grained material 12 to the surface 16a of the core material 16.

水系接着剤は、両者を接着可能であればどのような塗布の態様であってもよいが、芯材１６側に塗布されることが好ましい。集成圧縮柾目材１２側に塗布される場合、集成圧縮柾目材１２内部への水系接着剤中の水分の含浸量が増大し、集成圧縮柾目材１２の伸長量が増大するからである。 The water-based adhesive may be applied in any manner as long as it can bond the two, but it is preferably applied to the core material 16 side. This is because when applied to the compressed laminated straight-grained material 12 side, the amount of water in the water-based adhesive that impregnates the inside of the compressed laminated straight-grained material 12 increases, and the amount of elongation of the compressed laminated straight-grained material 12 increases.

また、集成圧縮柾目材１２内部への水系接着剤中の水分の含浸量を減らす観点から、芯材１６をペーパーハニカムコアとし、芯材１６側に水系接着剤を塗布することが好ましい。 Further, from the viewpoint of reducing the amount of water in the water-based adhesive that permeates into the inside of the compressed straight-grained material 12, it is preferable that the core material 16 is a paper honeycomb core and that the water-based adhesive is applied to the core material 16 side.

また、２．接着集成工程で２枚の集成圧縮柾目材１２－１、１２－２が得られる場合には、図１（ｂ）に示すように、本工程では、集成圧縮柾目材１２－１の裏面部１２－１ｂを芯材１６の表面１６ａと接着し、他の集成圧縮材１２－２の表面部１２－２ａを心材１６の裏面１６ｂと接着することができる。 Also, 2. When two sheets of compressed straight-grain laminated materials 12-1 and 12-2 are obtained in the adhesive lamination process, as shown in FIG. -1b can be bonded to the front surface 16a of the core material 16, and the surface portion 12-2a of the other compressed laminated material 12-2 can be bonded to the back surface 16b of the core material 16.

これによれば、芯材１６が集成圧縮柾目材１２－１と他の集成圧縮柾目材１２－２との間に挟まれた積層構造を有する積層材１０を得ることができる。 According to this, it is possible to obtain a laminated material 10 having a laminated structure in which the core material 16 is sandwiched between the compressed straight-grained material 12-1 and the other compressed straight-grained material 12-2.

さらに、２．接着集成工程でさらに集成圧縮柾目材１２－３が得られる場合には、図２に示すように、この集成圧縮柾目材１２－３で枠体２４を形成し、本工程では、芯材２２の側面に枠体２４を接着固定し、芯材２２の表面と集成圧縮柾目材１２－１の裏面部とを接着し、芯材２２の裏面と集成圧縮柾目材１２－２の表面部とを接着して積層材２０を得ることとしてもよい（以上、接着工程）。 Furthermore, 2. If a laminated compressed straight-grain material 12-3 is further obtained in the adhesive lamination process, a frame body 24 is formed from this laminated compressed straight-grain material 12-3, as shown in FIG. 2, and in this process, the core material 22 is The frame body 24 is adhesively fixed to the side surface, the front surface of the core material 22 and the back surface of the laminated compressed straight-grain material 12-1 are adhered, and the back surface of the core material 22 and the surface portion of the laminated compressed straight-grain material 12-2 are adhered. The laminated material 20 may be obtained by doing so (the above is an adhesion process).

なお、本発明は上記実施の形態に限定されることはなく、発明の趣旨を逸脱しない範囲で種々変更可能である。 Note that the present invention is not limited to the above-described embodiments, and can be modified in various ways without departing from the spirit of the invention.

例えば、上記実施の形態において、積層材はテーブルの天板用途として例示されているが、これに限られるものではなく、引き出し、机、椅子、仏壇、書棚等の家具やその構成部材に、あるいは柱、ドアの扉、床、壁等の建材に、さまざまな用途で用いることができる。 For example, in the above embodiments, the laminated material is used as a table top, but it is not limited to this, and can be used in furniture such as drawers, desks, chairs, Buddhist altars, bookshelves, and their constituent parts. It can be used for a variety of purposes as building materials such as columns, doors, floors, and walls.

以下、本発明をさらに実施例により詳細に説明する。 Hereinafter, the present invention will be further explained in detail with reference to Examples.

［１．積層材の製造］
１－１．集成圧縮柾目材の製造
杉の板目材を蒸煮缶（株式会社山本鉄工所製）を用いて蒸煮し、板目材を軟化させた。この板目材を図３に示す圧縮装置５０（株式会社山本鉄工所製）を用い、図３（ａ）に示す状態でさらに加熱し、加熱軟化処理を施した。 [1. Manufacture of laminate materials]
1-1. Manufacture of laminated compressed straight-grained wood Cedar planks were steamed using a steamer can (manufactured by Yamamoto Iron Works Co., Ltd.) to soften the planks. This plate material was further heated in the state shown in FIG. 3(a) using a compression device 50 (manufactured by Yamamoto Iron Works Co., Ltd.) shown in FIG. 3, and subjected to heat softening treatment.

次に、図３（ｂ）に示すように、圧縮装置５０の圧縮型を閉じて加熱固定処理を行った。 Next, as shown in FIG. 3(b), the compression mold of the compression device 50 was closed and a heat fixing process was performed.

加熱軟化処理及び加熱固定処理は、上記実施の形態の［１．加熱圧縮工程］に示した条件の範囲内で行った。得られた圧縮板目材の厚みは約３ｃｍであり、圧縮率は全て５０±１％の範囲内であった。 The heat softening treatment and the heat fixing treatment are performed in [1. The heating and compression process was carried out within the range of conditions shown in [Heating and Compression Step]. The thickness of the obtained compressed grain material was about 3 cm, and the compression ratio was all within the range of 50±1%.

この圧縮板目材を、図９に示すように、それぞれ３ｃｍの間隔をおいて厚み方向に複数箇所で切断して複数の圧縮板目材片を得て、これを９０°回転させて柾目面を上下面に露出させ、圧縮板目材片の板目面を相互に突き合わせて接着集成し、厚み３ｃｍの集成圧縮柾目材を得た。 As shown in Fig. 9, this compressed board material is cut at multiple points in the thickness direction at intervals of 3 cm to obtain a plurality of compressed board material pieces, which are then rotated 90 degrees to create a straight-grained surface. were exposed on the upper and lower surfaces, and the grain surfaces of the compressed board pieces were butted against each other and laminated with adhesive, to obtain a laminated compressed straight grain board with a thickness of 3 cm.

１－２．試験例１及び２に係る積層材の製造
１－１．集成圧縮柾目材の製造で得られた集成圧縮柾目材を切断し、幅４４０ｍｍ、長さ８８０ｍｍ、厚み４ｍｍの寸法の２枚の集成圧縮柾目材３２－１、３２－２を得た。 1-2. Manufacture of laminate materials according to Test Examples 1 and 2 1-1. The laminated compressed straight-grained timber obtained in the production of laminated compressed straight-grained timber was cut to obtain two laminated compressed straight-grained timbers 32-1 and 32-2 with dimensions of 440 mm in width, 880 mm in length, and 4 mm in thickness.

次に、集成圧縮柾目材の製造で得られた集成圧縮柾目材を適宜に接着及び切断してサイズ調整し、図５（ａ）に示すように、縦枠３４ａ，３４ａ，３４ａと横枠３４ｂ，３４ｂとによって形成された枠体３４（３２－３）を得た。 Next, the laminated compressed straight-grained materials obtained in the production of laminated compressed straight-grained materials are appropriately glued and cut to adjust the size, and as shown in FIG. 5(a), vertical frames 34a, 34a, 34a and horizontal frames 34b , 34b was obtained.

縦枠３４ａ，３４ａの寸法は、それぞれ、幅５０ｍｍ、長さ３５０ｍｍ、厚み３０ｍｍであり、横枠３４ｂ，３４ｂの寸法は、それぞれ、幅５０ｍｍ、長さ８８０ｍｍ、厚み３０ｍｍである。 The vertical frames 34a, 34a each have a width of 50 mm, a length of 350 mm, and a thickness of 30 mm, and the horizontal frames 34b, 34b each have a width of 50 mm, a length of 880 mm, and a thickness of 30 mm.

枠体３４の、外側の縦枠３４ａ、横枠３４ｂ、中央の縦枠３４ａ及び横枠３４ｂで囲まれた二つの領域の一方には、ペーパーハニカムコア製の芯材３８（ニューダイスコア、ナゴヤ芯材工業株式会社製）が設けられている。芯材３８の側面にタッカー針（タチカワステープル １０１０Ｊ、株式会社立川ピン製作所製）にて固定されている。枠体３４の他方の領域は、空洞のままとなっている。 A core material 38 made of paper honeycomb core (New Dice Core, Nagoya (manufactured by Shinzai Kogyo Co., Ltd.). It is fixed to the side surface of the core material 38 with a tacker needle (Tachikawa Staple 1010J, manufactured by Tachikawa Pin Seisakusho Co., Ltd.). The other region of the frame 34 remains hollow.

次に、枠体３４（集成圧縮柾目材３２－３）と集成圧縮柾目材３２－１および３２－２との接着を行う。 Next, the frame body 34 (laminated compressed straight-grained material 32-3) and the laminated compressed straight-grained materials 32-1 and 32-2 are bonded.

第１に、集成圧縮柾目材３２－１の裏面部及び集成圧縮柾目材３２－２の表面部のそれぞれ全面に接着剤（マルカボンド １５３Ｋ、中部サイデン株式会社製）を塗布し、芯材３８及び枠体３４の表面と集成圧縮柾目材３２－１の裏面部、芯材３８及び枠体３４の裏面と集成圧縮柾目材３２－２の表面部、をそれぞれ当接させて接着し、試験例１に係る積層材３０とした。 First, adhesive (MARUKABOND 153K, manufactured by Chubu Saiden Co., Ltd.) is applied to the entire back surface of the compressed straight-grain laminated material 32-1 and the front surface of the compressed straight-grain laminated material 32-2, and the core material 38 and the frame are The surface of the body 34 and the back surface of the compressed straight-grain laminated material 32-1, and the back surface of the core material 38 and the frame 34 and the surface of the compressed straight-grain laminated material 32-2 were brought into contact and adhered, and the process was carried out in Test Example 1. Such a laminated material 30 was prepared.

次に、接着材を枠体３４及び芯材３８の表面及び裏面に塗布したこと以外は試験例１と同じ方法で集成圧縮柾目材３２－１、枠体３４（集成圧縮柾目材３２－３）及び集成圧縮柾目材３２－２を積層して接着し、試験例２に係る積層材３０とした。 Next, the compressed laminated straight-grained material 32-1 and the frame 34 (laminated compressed straight-grained material 32-3) were prepared in the same manner as in Test Example 1, except that the adhesive was applied to the front and back surfaces of the frame 34 and the core material 38. and laminated compressed straight-grained material 32-2 were laminated and bonded to form a laminated material 30 according to Test Example 2.

１－３．試験例１及び２に係る積層材の環境試験
試験例１及び２に係る積層材について、加湿、乾燥の条件下に置いたときの寸法変化を検証する試験を行った。 1-3. Environmental testing of the laminate materials according to Test Examples 1 and 2 A test was conducted to verify dimensional changes when placed under humidified and dry conditions for the laminate materials according to Test Examples 1 and 2.

環境試験は、１－２．試験例１及び２に係る積層材の製造で得られた積層材を、４日間加湿環境に置き、その後１５時間乾燥環境に置くことにより実施した。 The environmental test is 1-2. The laminates obtained in the production of laminates according to Test Examples 1 and 2 were placed in a humidified environment for 4 days, and then placed in a dry environment for 15 hours.

加湿環境は、台車枠にラップフィルム（ダイヤストレッチフィルム ｔ０．０１７ｍｍ、メーカー名：司化成工業株式会社製）を巻き付けて台車内空間を外部環境と遮断し、お湯を張ったバケツを台車の四隅に配置することにより設定した。バケツのお湯は、試験開始時及びその後毎朝交換した。加湿条件において、温度、湿度及び平衡含水率を１６：００～１８：００の間に各日１回ずつ測定した。 To create a humidified environment, wrap film (Diamond Stretch Film, t0.017 mm, manufactured by Tsukasa Kasei Kogyo Co., Ltd.) around the trolley frame to isolate the inner space of the trolley from the outside environment, and place buckets filled with hot water at the four corners of the trolley. It was set by placing. The hot water in the bucket was changed at the start of the test and every morning thereafter. Under humidified conditions, temperature, humidity, and equilibrium moisture content were measured once each day between 16:00 and 18:00.

乾燥環境は、自社制作の曲木乾燥室で設定したが、曲げ木乾燥室としては表１中の乾燥環境を実現できるものであればよく、市販の恒温器、恒温室を用いることができる。 The drying environment was set in a bentwood drying room built in-house, but any bentwood drying room that can achieve the drying environment shown in Table 1 may be used, and a commercially available thermostat or constant temperature room can be used.

加湿環境、乾燥環境の条件を表１に示す。なお、表１において、試験前とは、加湿環境１日目の前日の１６：００～１８：００の間に測定したものである。 Table 1 shows the conditions of the humidified environment and the dry environment. In Table 1, "before the test" refers to measurements taken between 16:00 and 18:00 on the day before the first day of the humidified environment.

Figure 0007387133000001
Figure 0007387133000001

※１：平衡含水率(%)は、温度と湿度から得られる平衡含水率表より算出した。上記表については空間内の空気中の平衡含水率になる。
※２：２日目は台車を屋外に日中移動させたことで温度が上昇し、相対的に湿度が低下した。
※３：乾燥環境は、５日目の朝に試験例１，２の積層材を加湿環境から乾燥環境に移し、１５時間乾燥環境に置くことにより実施した。 *1: Equilibrium moisture content (%) was calculated from the equilibrium moisture content table obtained from temperature and humidity. For the above table, it is the equilibrium moisture content of the air in the space.
*2: On the second day, the trolley was moved outdoors during the day, resulting in a rise in temperature and a relative decrease in humidity.
*3: The dry environment was carried out by moving the laminates of Test Examples 1 and 2 from the humid environment to the dry environment on the morning of the 5th day, and leaving them in the dry environment for 15 hours.

上記環境試験を施した試験例１、２の積層材について、その寸法を測定した。寸法の測定は、試験例１，２の積層材について、それぞれ、図６（ａ）の矢印１３０ａ及び矢印１３０ｂの長さを測定することで行った。矢印１３０ａの長さは、図５（ａ）に示す芯材３８が設置された領域における積層材の短手方向長さ（且つ、縦枠３４ａ，３４ａに挟まれた領域の長さ）であり（以下、幅（芯材あり）ともいう）、矢印１３０ｂの長さは、図５（ａ）に示す芯材３８が設置されていない空洞の領域における積層材の短手方向長さ（且つ、縦枠３４ａ，３４ａに挟まれた領域の長さ）である（以下、幅（芯材なし）ともいう）。 The dimensions of the laminated materials of Test Examples 1 and 2 that were subjected to the above environmental test were measured. The dimensions were measured by measuring the lengths of the arrows 130a and 130b in FIG. 6(a) for the laminated materials of Test Examples 1 and 2, respectively. The length of the arrow 130a is the width direction length of the laminated material in the area where the core material 38 shown in FIG. 5(a) is installed (and the length of the area sandwiched between the vertical frames 34a, 34a). (Hereinafter, also referred to as the width (with core material)) and the length of the arrow 130b are the width direction length of the laminated material in the region of the cavity where the core material 38 shown in FIG. 5(a) is not installed (and (hereinafter also referred to as width (without core material)).

試験例１，２の積層材の寸法の測定は、試験前（すなわち、加湿環境１日目の前日の１６：００～１８：００の間）、加湿環境４日目の１６：００～１８：００の間、及び乾燥環境に置いた日の夜にそれぞれ実施した。 The dimensions of the laminates in Test Examples 1 and 2 were measured before the test (that is, between 16:00 and 18:00 on the day before the first day of the humidified environment) and between 16:00 and 18:00 on the fourth day of the humidified environment. 00, and on the night of the day it was placed in a dry environment.

結果を表２に示す。 The results are shown in Table 2.

Figure 0007387133000002
Figure 0007387133000002

（表中、（）内の数値は、試験前と比較した幅の増減を示す。） (In the table, the numbers in parentheses indicate the increase or decrease in width compared to before the test.)

表２に示すように、幅（芯材あり）と幅（芯材なし）との比較によれば、枠体内に芯材を設けることで、枠体内が空洞となっている場合と比較して集成圧縮柾目材３２－１、３２－２の幅方向への伸長が拘束され、積層材の寸法変化を抑制することができることが判った。 As shown in Table 2, a comparison of width (with core material) and width (without core material) shows that by providing a core material inside the frame, compared to when the frame is hollow, It was found that the expansion of the compressed laminated straight-grained materials 32-1 and 32-2 in the width direction was restrained, and dimensional changes in the laminated materials could be suppressed.

また、試験例１と試験例２との比較により、集成圧縮柾目材３２－１の裏面部全面及び集成圧縮柾目材３２－２の表面部全面に水系接着剤を塗布する場合と比較して集成圧縮柾目材３２－１、３２－２の幅方向への伸長がより強く拘束され、積層材の寸法変化を抑制することができることが判った。 In addition, by comparing Test Example 1 and Test Example 2, it was found that the adhesive was applied to the entire back surface of the compressed laminated straight-grained material 32-1 and the entire surface of the compressed laminated straight-grained material 32-2. It was found that the expansion of the compressed straight-grained materials 32-1 and 32-2 in the width direction was more strongly restrained, and dimensional changes in the laminated material could be suppressed.

図７は、環境試験後の試験例１に係る積層材の空洞領域（芯材を有さない領域）側を示す図面代用写真であり、図８は、環境試験後の試験例２に係る積層材の芯材を有する領域側を示す図面代用写真である。 FIG. 7 is a photograph substituted for a drawing showing the cavity region (area without core material) side of the laminated material according to Test Example 1 after the environmental test, and FIG. 8 is a photograph showing the laminated material according to Test Example 2 after the environmental test. It is a photograph substituted for a drawing showing the area side having the core material of the material.

図７及び図６（ｂ）に示すように、環境試験後は、積層材の芯材を有さない側の領域は集成圧縮柾目材３２－１、３２－２の寸法変化による膨らみｄ（図６（ｂ）参照）が生じていた。 As shown in FIGS. 7 and 6(b), after the environmental test, the area on the side of the laminated material that does not have a core material has a bulge d due to the dimensional change of the compressed straight-grained laminated materials 32-1 and 32-2 (Fig. 6(b))) had occurred.

一方、図８に示すように、環境試験後においても、積層材の芯材を有する領域側においては集成圧縮柾目材３２－１、３２－２の変形が抑制されたことで積層材は製造直後の形状を維持していたことが、ステンレス定規と積層材表面との間に隙間がないことから理解できる。 On the other hand, as shown in Fig. 8, even after the environmental test, the deformation of the laminated compressed straight-grained timbers 32-1 and 32-2 was suppressed on the side with the core material of the laminated material, so that the laminated material was This can be understood from the fact that there was no gap between the stainless steel ruler and the surface of the laminated material.

２ 板目材
４ 圧縮板目材
４ａ 板目面
１０、２０、３０ 積層材
１２、１２－１、１２－２、１２－３、３２－１、３２－２、３２－３ 集成圧縮柾目材
１２ａ 柾目面
１２ｃ、１２－１ｃ、１２－２ｃ 接着部
１２－２ａ 表面部
１２ｂ、１２－１ｂ 裏面部
１６、２２、３８ 芯材
１６ａ 表面
１６ｂ 裏面
２４ 枠体 2 Grain material 4 Compressed grain material 4a Grain surface 10, 20, 30 Laminated material 12, 12-1, 12-2, 12-3, 32-1, 32-2, 32-3 Laminated compressed straight grain material 12a Straight grain surfaces 12c, 12-1c, 12-2c Adhesive section 12-2a Front section 12b, 12-1b Back section 16, 22, 38 Core material 16a Front surface 16b Back surface 24 Frame

Claims (2)

板目材が厚み方向に加熱圧縮されてなる複数の圧縮板目材の板目面が相互に突き合わされて接着されてなる接着部を有する接着体として形成され、それぞれ連続する柾目面が露出する表面部及び裏面部を有すると共に、厚みが１ｍｍ超である板状の集成圧縮柾目材と、
該集成圧縮柾目材の裏面部に表面が接着される板状の芯材と、
を有する積層材であって、
前記板状の芯材の裏面に前記集成圧縮柾目材とは異なる他の集成圧縮柾目材の表面部が接着されることで、前記芯材が前記集成圧縮柾目材と前記他の集成圧縮柾目材との間に挟まれた積層構造を有すると共に、
前記芯材の側面に、前記集成圧縮柾目材で形成された枠体が固定されていることを特徴とする積層材。 The grain surfaces of a plurality of compressed grain materials are heated and compressed in the thickness direction, and the grain surfaces of the compressed grain materials are butted against each other and bonded together to form a bonded body having an adhesive part, and each continuous straight grain surface is exposed. A plate-shaped compressed laminated straight-grained material having a front surface portion and a back surface portion and having a thickness of more than 1 mm;
a plate-shaped core material whose surface is adhered to the back side of the laminated compressed straight-grained material;
A laminate material having
By bonding a surface portion of another laminated compressed straight-grain material different from the laminated compressed straight-grain material to the back surface of the plate-shaped core material, the core material is bonded to the laminated compressed straight-grain material and the other laminated compressed straight-grain material. It has a laminated structure sandwiched between
A laminate material characterized in that a frame body formed of the compressed laminated straight grain material is fixed to a side surface of the core material. 板目材を厚み方向に加熱圧縮して圧縮板目材を得る加熱圧縮工程と、
該圧縮板目材の板目面を相互に突き合わせて接着集成させ、表面部及び裏面部に連続する柾目面が露出するとともに、厚みが１ｍｍ超である集成圧縮柾目材を得る接着集成工程と、
該集成圧縮柾目材の裏面部を板状の芯材の表面と接着して積層材を得る接着工程と、
を有し、
前記接着集成工程で少なくとも３枚の集成圧縮柾目材１２－１、１２－２および１２－３が得られ、
前記接着工程で、前記集成圧縮柾目材１２－１の裏面部を板状の芯材の表面と接着し、前記集成圧縮柾目材１２－１とは異なる他の集成圧縮柾目材１２－２の表面部が前記板状の芯材の裏面と接着し、前記芯材が前記集成圧縮柾目材１２－１と前記他の集成圧縮柾目材１２－２との間に挟まれた積層構造を有すると共に、前記集成圧縮柾目材１２－３で形成された枠体を前記芯材の側面に接着固定した積層材が得られることを特徴とする積層材の製造方法。 a heating compression step of heating and compressing the grain material in the thickness direction to obtain a compressed grain material;
A gluing and laminating step in which the grain surfaces of the compressed board materials are butted against each other and bonded and laminated to obtain a laminated compressed straight grained material having continuous straight grain surfaces exposed on the front and back surfaces and having a thickness of more than 1 mm;
a bonding step of bonding the back side of the compressed laminated straight-grained material to the surface of the plate-shaped core material to obtain a laminated material;
has
At least three laminated compressed straight grain materials 12-1, 12-2 and 12-3 are obtained in the adhesive lamination step,
In the bonding step, the back side of the compressed laminated straight-grained material 12-1 is adhered to the surface of the plate-shaped core material, and the surface of the compressed laminated straight-grained material 12-2, which is different from the compressed laminated straight-grained material 12-1, is bonded to the surface of the plate-shaped core material. has a laminated structure in which the core material is sandwiched between the compressed laminated straight-grained material 12-1 and the other compressed laminated straight-grained material 12-2; A method for producing a laminated material, characterized in that a laminated material is obtained in which a frame formed of the compressed straight-grain laminated material 12-3 is adhesively fixed to the side surface of the core material.
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* Cited by examiner, † Cited by third party
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JP2002326204A (en) 2001-05-07 2002-11-12 Oorisu Kk Sliced veneer decorative laminate
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JP2763188B2 (en) * 1990-09-07 1998-06-11 朝日銘木株式会社 Method of manufacturing thick veneer decorative board
JPH09141609A (en) * 1995-11-20 1997-06-03 Takeuchi Mokuzai Kogyo Kk Manufacture of surface laminated decorative material and manufacture of plate-like material such as flooring material, wall material or the like
JPH10273951A (en) * 1997-03-29 1998-10-13 Comany Kk Panel frame body
JPH11254404A (en) * 1998-03-16 1999-09-21 My Wood Kk Sliced veneer and its manufacture

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Publication number Priority date Publication date Assignee Title
JP2002326204A (en) 2001-05-07 2002-11-12 Oorisu Kk Sliced veneer decorative laminate
JP2007290226A (en) 2006-04-25 2007-11-08 Matsushita Electric Works Ltd Wooden counter
JP2015157414A (en) 2014-02-25 2015-09-03 朝雄 島崎 Method for producing woody decorative veneer
JP2016165860A (en) 2015-03-10 2016-09-15 飛騨産業株式会社 Method of manufacturing integrated compressed regular grain wood, and integrated compressed regular grain wood

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