JP6230837B2 - Skew plywood - Google Patents
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- JP6230837B2 JP6230837B2 JP2013148756A JP2013148756A JP6230837B2 JP 6230837 B2 JP6230837 B2 JP 6230837B2 JP 2013148756 A JP2013148756 A JP 2013148756A JP 2013148756 A JP2013148756 A JP 2013148756A JP 6230837 B2 JP6230837 B2 JP 6230837B2
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Description
本発明は、複数枚の木製単板を積層してなり、少なくとも２枚の単板は繊維方向が長さ方向に対して傾斜する斜行単板である合板の製造方法及び合板に関する。 The present invention relates to a method of manufacturing plywood and a plywood in which a plurality of wooden veneers are laminated, and at least two veneers are skewed veneers whose fiber directions are inclined with respect to the length direction.
複数枚の木製単板を積層してなり、少なくとも２枚の単板は繊維方向が長さ方向に対して傾斜する斜行単板である合板として、木目（繊維方向）が縦、横、左斜め４５度又は右斜め４５度の各単板を積層した全方位強力合板が知られている（特許文献１参照）。 Stacked with multiple wooden veneers, at least two veneers are plywoods that are skewed veneers whose fiber direction is inclined with respect to the length direction, and the grain (fiber direction) is vertical, horizontal, left An omnidirectional strong plywood is known in which single plates of 45 degrees oblique or 45 degrees right oblique are laminated (see Patent Document 1).
前記全方位強力合板は、次のようにして製造される。まず、横木目の単板を、略梯子形状の四角片と略直角三角形状の三角片に切断し、四角片と三角片とを貼り合わせることにより、木目が左斜め４５度又は右斜め４５度であって所定の長さ及び横幅を備える矩形の単板を形成する。左斜め木目の単板又は右斜め木目の単板は、反転することにより右斜め木目の単板又は左斜め木目の単板とすることができる。 The omnidirectional strong plywood is manufactured as follows. First, a single piece of horizontal grain is cut into a substantially ladder-shaped square piece and a substantially right-angled triangular piece, and the square piece and the triangular piece are bonded to each other so that the grain is 45 degrees to the left or 45 degrees to the right. A rectangular single plate having a predetermined length and width is formed. The left diagonal wood veneer or right diagonal wood veneer can be turned into a right diagonal wood veneer or a left diagonal wood veneer by reversing.
次に、所定の長さ及び横幅を備える横木目の矩形の単板を芯材として用い、横木目の単板の表面に左斜め木目の単板を貼り合わせ、裏面に右斜め木目の単板を貼り合わせて、３層の複合単板を形成する。次に、３層の複合単板の表裏両面に、所定の長さ及び横幅を備える縦木目の矩形の単板を貼り合わせることにより、５層の単板からなる合板を得ることができる。 Next, a rectangular veneer having a predetermined length and width is used as a core material, a left diagonal wood veneer is bonded to the surface of the horizontal wood veneer, and a right diagonal wood veneer is attached to the back surface. Are laminated to form a three-layer composite veneer. Next, a plywood composed of a single layer of five layers can be obtained by bonding a rectangular single plate having a predetermined length and width to the front and back surfaces of a three-layer composite single plate.
しかしながら、従来の合板の製造方法によれば、予め所定の長さ及び横幅に形成された各単板を貼り合わせて合板とするので、種々の長さを備える合板を製造することが難しい上に、合板自体を連続的に製造することが難しいという不都合がある。 However, according to the conventional method for manufacturing plywood, it is difficult to manufacture plywood having various lengths because each single plate previously formed in a predetermined length and width is bonded to form plywood. There is an inconvenience that it is difficult to continuously manufacture the plywood itself.
また、従来の合板の製造方法によれば、斜め木目の単板は、木目（繊維方向）に対して切れ目が入って木目が切断された形態となっているので、合板としたときに強度が不十分となる虞があるという問題がある。 In addition, according to the conventional method of manufacturing plywood, the single plate of diagonal wood has a form in which the wood is cut with respect to the wood (fiber direction). There is a problem that it may become insufficient.
本発明は、種々の長さを備えるとともに優れた強度を備える合板を連続的に製造することができる製造方法及びその合板を提供することを目的とする。 An object of this invention is to provide the manufacturing method and its plywood which can manufacture continuously the plywood which is provided with various lengths and was equipped with the outstanding intensity | strength.
前記目的を達成するために、本発明は、複数枚の木製単板を積層してなり、少なくとも２枚の単板は繊維方向が長さ方向に対して傾斜する斜行単板である合板の製造方法であって、木製単板を繊維方向が長さ方向になるように短冊状に切断して複数の短冊形状板を得る第１工程と、該第１工程で得られた短冊形状板を、長さ方向から傾いた方向に移動して先行し隣り合う短冊形状板に対して長さ方向にずらした状態で該短冊形状板の側縁に接合することにより、長尺状斜行単板を形成する第２工程と、該長尺状斜行単板の上面に接着剤を塗布し、該接着剤が塗布された長尺状斜行単板上で、該第１工程で得られた短冊形状板を、長さ方向が該長尺状斜行単板の移動方向に交差するように配置され、該長尺状斜行単板の移動方向と同一方向に移動して先行し隣り合う短冊形状板に対して長さ方向にずらした状態で該短冊形状板の側縁に接合することにより、一の長尺状斜行単板の上に他の長尺状斜行単板を積層することを１回以上行う第３工程と、該第３工程で複数の長尺状斜行単板が積層された長尺状積層体を厚さ方向に圧締することにより、接着された複数の長尺状斜行単板からなる長尺状合板を形成する第４工程と、第４工程で得られた長尺状合板を移動方向において所望の長さに裁断して合板を形成する第５工程とを備えることを特徴とする。 In order to achieve the above-mentioned object, the present invention provides a laminated board comprising a plurality of wooden veneers, wherein at least two veneers are skewed veneers whose fiber direction is inclined with respect to the length direction. 1st process which is a manufacturing method, cut | disconnects a wooden veneer in strip shape so that a fiber direction may become a length direction, and the strip-shaped board obtained by this 1st process is obtained. Long slanting single plate by joining to the side edge of the strip-shaped plate in a state shifted in the length direction with respect to the preceding and adjacent strip-shaped plate moving in a direction inclined from the length direction A second step of forming an adhesive, and applying an adhesive to the upper surface of the elongated skewed veneer, and obtained in the first step on the elongated skewed veneer coated with the adhesive The strip-shaped plate is arranged so that the length direction intersects the moving direction of the elongated skewed single plate, and is moved in the same direction as the moving direction of the elongated skewed single plate. Then, by joining to the side edge of the strip-shaped plate in a state shifted in the length direction with respect to the preceding and adjacent strip-shaped plate, another long shape is formed on one long skew single plate. A third step in which the slanting single plates are laminated one or more times, and a long laminate in which a plurality of long slanting single plates are laminated in the third step is pressed in the thickness direction. The fourth step of forming a long plywood composed of a plurality of long slanting single plates bonded together, and the long plywood obtained in the fourth step is cut to a desired length in the moving direction. And a fifth step of forming a plywood.
本発明の製造方法では、まず、第１工程として、木製単板を繊維方向が長さ方向になるように短冊状に切断することにより、複数の短冊形状板を得る。 In the manufacturing method of the present invention, first, as a first step, a plurality of strip-shaped plates are obtained by cutting a wooden veneer into strips so that the fiber direction is in the length direction.
次に、第２工程として、第１工程で得られた短冊形状板を、長さ方向から傾いた方向に移動して先行し隣り合う短冊形状板に対して長さ方向にずらした位置に配置した後に、その短冊形状板の側縁に接合することにより、長尺状斜行単板を形成する。 Next, as the second step, the strip-shaped plate obtained in the first step is moved in a direction inclined from the length direction and arranged in a position shifted in the length direction with respect to the preceding and adjacent strip-shaped plate. After that, a long skew single plate is formed by bonding to the side edge of the strip-shaped plate.
次に、第３工程として、まず、第２工程で得られた長尺状斜行単板の上面に接着剤を塗布する。次に、前記接着剤が塗布された長尺状斜行単板の上で、第１工程で得られた短冊形状板を、該長尺状斜行単板の移動方向と同一方向に移動して先行し隣り合う短冊形状板に対して長さ方向にずらした状態で、その短冊形状板の側縁に接合する。前記長尺状斜行単板上で先行し隣り合う短冊形状板は、長さ方向が該長尺状斜行単板の移動方向に交差するように配置されている。 Next, as a third step, first, an adhesive is applied to the upper surface of the long skew single plate obtained in the second step. Next, the strip-shaped plate obtained in the first step is moved in the same direction as the moving direction of the long skew single plate on the long skew single plate coated with the adhesive. The strip-shaped plate is joined to the side edge of the strip-shaped plate in a state shifted in the length direction with respect to the adjacent strip-shaped plate. The strip-shaped plates that precede and adjoin on the long skew single plate are arranged such that the length direction intersects the moving direction of the long skew single plate.
そして、前記接着剤の塗布と前記短冊形状板の接合とを１回以上行うことにより、積層された複数の長尺状斜行単板からなる長尺状積層体を形成する。 And the elongate laminated body which consists of several laminated | stacked elongate skew single plates is formed by performing the application | coating of the said adhesive agent, and joining of the said strip-shaped board once or more.
次に、第４工程として、第３工程で得られた長尺状積層体を厚さ方向に圧締することにより、接着された複数の長尺状斜行単板からなる長尺状合板を形成する。 Next, as a fourth step, a long plywood composed of a plurality of long slanting single plates bonded together is obtained by pressing the long laminate obtained in the third step in the thickness direction. Form.
次に、第５工程として、第４工程で得られた長尺状合板を移動方向において所望の長さに裁断して合板を形成する。 Next, as a fifth step, the long plywood obtained in the fourth step is cut into a desired length in the moving direction to form a plywood.
以上により、複数枚の単板を積層してなり、少なくとも２枚の単板は、繊維方向が長さ方向に対して傾斜するように複数の短冊形状板が側縁を合わせて接合されてなる斜行単板である合板を得ることができる。 As described above, a plurality of single plates are laminated, and at least two single plates are formed by joining a plurality of strip-shaped plates with their side edges aligned so that the fiber direction is inclined with respect to the length direction. A plywood which is a skewed single plate can be obtained.
本発明の製造方法によれば、前記短冊形状板を接合して積層した長尺状合板を第５の工程で所望の長さに裁断して合板とするので、種々の所望の長さを備える合板を連続的に製造することができる。また、合板を構成する各層の斜行単板は短冊形状板の側縁を接合して形成されているので、木目が切断されることがなく優れた強度を備える合板を製造することができる。 According to the manufacturing method of the present invention, the long plywood obtained by joining and laminating the strip-shaped plates is cut into a desired length in the fifth step, so that the plywood has various desired lengths. Plywood can be manufactured continuously. Moreover, since the skew single plate of each layer constituting the plywood is formed by joining the side edges of the strip-shaped plate, a plywood having excellent strength can be manufactured without cutting the wood grain.
また、本発明の製造方法では、前記第３工程において、前記接着剤が塗布された長尺状斜行単板上で、前記第１工程で得られた短冊形状板を、該長尺状斜行単板の各短冊形状板と交差するように配置してもよい。前記長尺状積層体を構成する各長尺状斜行単板の繊維方向を互いに交差させることができるので、より優れた強度を備える合板を得ることができる。 Further, in the manufacturing method of the present invention, in the third step, the strip-shaped plate obtained in the first step is formed on the long skew single plate coated with the adhesive. You may arrange | position so that each strip-shaped board of a row single plate may cross | intersect. Since the fiber directions of the long slanting single plates constituting the long laminated body can be crossed with each other, a plywood having more excellent strength can be obtained.
また、本発明の製造方法では、前記第３工程において、前記接着剤が塗布された長尺状斜行単板上で、前記第１工程で得られた短冊形状板を、該長尺状斜行単板の移動方向に対して直交するように配置してもよい。斜行単板と直交単板とが積層された合板を得ることができる。前記斜行単板と直交単板とが積層された合板は、斜行単板のみが積層された合板と比較して、種々の方向からの応力に対して耐えることができる。 Further, in the manufacturing method of the present invention, in the third step, the strip-shaped plate obtained in the first step is formed on the long skew single plate coated with the adhesive. You may arrange | position so that it may orthogonally cross with respect to the moving direction of a row veneer. A plywood in which skewed single plates and orthogonal single plates are laminated can be obtained. The plywood in which the skew single plate and the orthogonal single plate are laminated can withstand stress from various directions as compared with the plywood in which only the skew single plate is laminated.
また、本発明の製造方法では、前記第３工程において、各長尺状斜行単板の繊維方向が厚さ方向の中心線を対称軸として線対称となるように各長尺状斜行単板を積層した長尺状積層体を得るように、前記接着剤が塗布された長尺状斜行単板上で前記第１工程で得られた短冊形状板を配置して、前記一の長尺状斜行単板の上に他の長尺状斜行単板を積層することを３回以上行うことが好ましい。このようにすることにより、４枚の斜行単板が積層され、各斜行単板がその繊維方向が厚さ方向の中心線を対称軸として線対称となるように積層された合板を得ることができる。前記合板は、各斜行単板が、その繊維方向が厚さ方向の中心線を対称軸として線対称となるように積層されているので、反り返りを防ぐことができる。 Further, in the manufacturing method of the present invention, in the third step, each elongated skewed single unit is such that the fiber direction of each elongated skewed single plate is line symmetric with respect to the center line in the thickness direction as the symmetry axis. The strip-shaped plate obtained in the first step is disposed on the long slanting single plate coated with the adhesive so as to obtain a long laminated body in which the plates are laminated, and the one long It is preferable to stack the other long skew single plate on the long skew single plate three or more times. In this way, four skewed single plates are laminated, and a plywood is obtained in which each skewed single plate is laminated so that its fiber direction is line-symmetric with respect to the center line in the thickness direction. be able to. In the plywood, each skewed single plate is laminated so that the fiber direction thereof is line-symmetric with respect to the center line in the thickness direction as a symmetry axis, so that warping can be prevented.
また、本発明の製造方法では、前記第１工程において、前記複数の短冊形状板を得た後に、該短冊形状板の長さ方向の両端部を前記移動方向と平行に裁断し、前記第２工程及び前記第３工程において、該第１工程で得られた短冊形状板を、前記先行し隣り合う短冊形状板と長さ方向の端部を一致させて該短冊形状板の側縁に接合することにより、所定の幅を備える合板を得ることができる。 In the manufacturing method of the present invention, in the first step, after obtaining the plurality of strip-shaped plates, both ends in the length direction of the strip-shaped plates are cut in parallel with the moving direction, and the second In the step and the third step, the strip-shaped plate obtained in the first step is joined to the side edge of the strip-shaped plate by matching the preceding and adjacent strip-shaped plate with the end in the length direction. Thus, a plywood having a predetermined width can be obtained.
この場合には、まず、前記第１工程において、裁断により形成された辺を底辺とし裁断前の短冊形状板の側縁を斜辺とする略平行四辺形状の短冊形状板を得ることができる。次に、第１工程で得られた略平行四辺形状の短冊形状板を用いて、前記第２工程において、先行し隣り合う短冊形状板と長さ方向の端部、すなわち前記底辺を一致させた状態で、該短冊形状板の側縁に接合して長尺状斜行単板を形成する。 In this case, first, in the first step, a substantially parallelogram-shaped strip-shaped plate can be obtained in which the side formed by cutting is the bottom side and the side edge of the strip-shaped plate before cutting is the hypotenuse. Next, using the substantially parallelogram-shaped strip-shaped plate obtained in the first step, in the second step, the adjacent adjacent strip-shaped plate and the end in the length direction, that is, the bottom side are matched. In this state, a long skew single plate is formed by joining to the side edge of the strip-shaped plate.
次に、前記第３工程において、前記接着剤が塗布された長尺状斜行単板上で、第１工程で得られた略平行四辺形状の短冊形状板を、先行し隣り合う短冊形状板と長さ方向の端部、すなわち前記底辺を一致させた状態で、その短冊形状板の側縁に接合することを３回以上繰り返して行う。これにより、各短冊形状板の端部が一致した長尺状積層体を得ることができる。 Next, in the third step, the substantially parallelogram-shaped strip-shaped plate obtained in the first step is preceded and adjacent to the elongated skewed single plate coated with the adhesive. And joining to the side edge of the strip-shaped plate in a state where the end in the length direction, that is, the bottom side is matched, is repeated three or more times. Thereby, the elongate laminated body with which the edge part of each strip-shaped board corresponded can be obtained.
次に、得られた長尺状積層体について、前記第４工程において圧締して長尺状合板とし、前記第５工程において所望の長さに裁断する。この結果、所望の長さ及び幅を備える合板を得ることができる。前記合板の幅は、各短冊形状板の両端部間の距離に相当する。 Next, the obtained long laminate is pressed into a long plywood in the fourth step and cut into a desired length in the fifth step. As a result, a plywood having a desired length and width can be obtained. The width of the plywood corresponds to the distance between both end portions of each strip-shaped plate.
以下、本発明による合板の製造方法の実施形態について説明する。 Hereinafter, an embodiment of a method for manufacturing a plywood according to the present invention will be described.
〔第１実施形態〕
本実施形態では、図１に示す４枚の木製斜行単板１ａ〜１ｄが積層された合板２の製造方法について説明する。
[First Embodiment]
In the present embodiment, a method for manufacturing the plywood 2 in which the four wooden skew single plates 1a to 1d shown in FIG. 1 are laminated will be described.
合板２は、複数の木製短冊形状板３が、その繊維方向が長手方向Ｌに対して傾斜するように、側縁部３ｅを合わせて結合して形成されたものである。合板２は、長手方向Ｌを縦方向とし短手方向Ｓを横方向とするとき、下から順に左斜め木目（繊維方向）の斜行単板１ａと、右斜め木目の斜行単板１ｂと、右斜め木目の斜行単板１ｃと、左斜め木目の斜行単板１ｄとが積層されている。各斜行単板１ａ〜１ｄは、複数の短冊形状板３がそれぞれの側縁部３ｅを合わせて結合されて形成され、各短冊形状板３の繊維方向３ａは斜行単板１ａ〜１ｄの長手方向Ｌに対して４５度の角度で傾斜している。 The plywood 2 is formed by joining a plurality of wooden strip-shaped plates 3 together with the side edge portions 3e so that the fiber direction is inclined with respect to the longitudinal direction L. When the longitudinal direction L is the longitudinal direction and the lateral direction S is the lateral direction, the plywood 2 is composed of a skewed single plate 1a having a left diagonal grain (fiber direction) and a skewed single plate 1b having a right diagonal wood pattern in order from the bottom. The slanting single plate 1c having a right slanting grain and the slanting single plate 1d having a slanting left grain are laminated. Each of the skewed single plates 1a to 1d is formed by joining a plurality of strip-shaped plates 3 with the respective side edge portions 3e being combined, and the fiber direction 3a of each of the strip-shaped plates 3 is that of the skewed single plates 1a to 1d. It is inclined with respect to the longitudinal direction L at an angle of 45 degrees.
本実施形態の合板の製造方法を実施する合板製造装置１１は、図２において、２つの板供給手段１２ａ，１２ｂによって供給される短冊形状板３を、主搬送機構１３により搬送し、後述の４つの結合手段１４ａ〜１４ｄ、３つの接着剤塗布手段１５ａ〜１５ｃ、圧締手段１６、第２の切断手段１７，第３の切断手段１８及び研磨手段１９によって処理する。 A plywood manufacturing apparatus 11 that performs the method for manufacturing a plywood according to the present embodiment transports the strip-shaped plate 3 supplied by the two plate supply means 12a and 12b by the main transport mechanism 13 in FIG. The treatment is performed by the two coupling means 14a to 14d, the three adhesive application means 15a to 15c, the pressing means 16, the second cutting means 17, the third cutting means 18 and the polishing means 19.
各板供給手段１２ａ，１２ｂは、図３に示すように、矩形の木製単板４をその繊維方向４ａが短冊の長さ方向になるように切断して複数の短冊形状板３を生成する第１の切断手段２９を備える。第１の切断手段２９としては、板材を裁断する裁断機（カッター）あるいは電動鋸（所謂、丸鋸）が用いられる。 As shown in FIG. 3, each plate supply means 12a, 12b cuts a rectangular wooden veneer 4 so that its fiber direction 4a is in the length direction of the strip, thereby generating a plurality of strip-shaped plates 3. One cutting means 29 is provided. As the first cutting means 29, a cutting machine (cutter) or an electric saw (so-called circular saw) for cutting a plate material is used.
単板４の材料としては、例えば、ケヤキ、カシ、ブナ、ナラ、サクラ、キリ、ラワン、チークなどの広葉樹や、スギ、カラマツ、マツ、ヒノキ、ツガ、ヒバなどの針葉樹、或いはこれらの組み合せを用いることができる。 As the material of the veneer 4, for example, broadleaf trees such as zelkova, oak, beech, oak, cherry, kiri, lawan, teak, conifers such as cedar, larch, pine, hinoki, cypress, hiba, or a combination thereof. Can be used.
第１の切断手段２９により切断された短冊形状板３は、主搬送機構１３を上流側（図３中の右側）から下流側を見るとき、第１の板供給手段１２ａによって主搬送機構１３の左側から主搬送機構１３に供給され、第２の板供給手段１２ｂによって主搬送機構１３の右側から供給される。主搬送機構１３には、短冊形状板３を並べて積み重ねるために、上流側から下流側へ順に第１〜第４の板載置機構２１ａ〜２１ｄが設けられている。第１，第４の板載置機構２１ａ，２１ｄは主搬送機構１３の左側に、第２，第３の板載置機構２１ｂ，２１ｃは主搬送機構１３の右側に、それぞれ主搬送機構１３の搬送方向に対して直交するように設けられている。 When the strip-shaped plate 3 cut by the first cutting means 29 is viewed from the upstream side (the right side in FIG. 3) to the downstream side of the main transport mechanism 13, the first plate supply means 12a It is supplied from the left side to the main transfer mechanism 13 and is supplied from the right side of the main transfer mechanism 13 by the second plate supply means 12b. The main transport mechanism 13 is provided with first to fourth plate placement mechanisms 21a to 21d in order from the upstream side to the downstream side in order to stack the strip-shaped plates 3 side by side. The first and fourth plate mounting mechanisms 21a and 21d are on the left side of the main transport mechanism 13, and the second and third plate mounting mechanisms 21b and 21c are on the right side of the main transport mechanism 13, respectively. It is provided so as to be orthogonal to the transport direction.
第１の切断手段２９により切断された短冊形状板３は、図示しない板挿入機と、必要に応じて短冊形状板３を第３，第４の板載置機構２１ｃ，２１ｄに搬送する板搬送手段３０とを介して板載置機構２１ａ〜２１ｄに載せられ、主搬送機構１３に供給される。 The strip-shaped plate 3 cut by the first cutting means 29 includes a plate insertion machine (not shown) and a plate transport that transports the strip-shaped plate 3 to the third and fourth plate mounting mechanisms 21c and 21d as necessary. It is placed on the plate placement mechanisms 21 a to 21 d via the means 30 and supplied to the main transport mechanism 13.
主搬送機構１３は、図４に示すように、その上に短冊形状板３が載置されて所定の速度で搬送する３列のベルトコンベア２０ａ〜２０ｃと、載置された短冊形状板３を下側に吸引する図示しない第１の吸引手段とを備える。主搬送機構１３は、前記第１の吸引手段の作動により短冊形状板３をベルトコンベア２０ａ〜２０ｃの上面に吸着固定して、安定して搬送することができる。 As shown in FIG. 4, the main transport mechanism 13 includes three rows of belt conveyors 20 a to 20 c on which the strip-shaped plate 3 is placed and transported at a predetermined speed, and the strip-shaped plate 3 placed thereon. First suction means (not shown) for sucking downward. The main transport mechanism 13 can stably transport the strip-shaped plate 3 by adsorbing and fixing it to the upper surfaces of the belt conveyors 20a to 20c by the operation of the first suction means.
各板載置機構２１ａ〜２１ｄは、短冊形状板３を主搬送機構１３に向かって所定の速度で搬送する副搬送機構２２と、副搬送機構２２の下流寄りに設けられ、短冊形状板３を副搬送機構２２から主搬送機構１３に載せ換える載せ換え機構２３とを備える。 Each plate mounting mechanism 21 a to 21 d is provided on the downstream side of the sub-transport mechanism 22 that transports the strip-shaped plate 3 at a predetermined speed toward the main transport mechanism 13, and the strip-shaped plate 3. A replacement mechanism 23 for replacing the sub-transport mechanism 22 with the main transport mechanism 13 is provided.
副搬送機構２２は、短冊形状板３を主搬送機構１３側へ搬送する３列のベルトコンベア２４ａ〜２４ｃを備える。ベルトコンベア２４ａ〜２４ｃは、それぞれの回転速度を変更可能であって、主搬送機構１３の下流側に位置するベルトコンベア２４ａほど搬送速度が大きくなっている。これにより、副搬送機構２２は、その搬送方向に対して繊維方向が直交するように載置された短冊形状板３を、搬送するにつれて搬送方向に対して傾斜させることができる。 The sub transport mechanism 22 includes three rows of belt conveyors 24a to 24c that transport the strip-shaped plate 3 to the main transport mechanism 13 side. The belt conveyors 24 a to 24 c can change their rotational speeds, and the belt conveyor 24 a located on the downstream side of the main transport mechanism 13 has a higher transport speed. Thereby, the sub-transport mechanism 22 can incline the strip-shaped plate 3 placed so that the fiber direction is orthogonal to the transport direction with respect to the transport direction as it is transported.
載せ換え機構２３は、副搬送機構２２のベルトコンベア２４ａ〜２４ｃの下流寄りの上方に平行に設けられた３列のベルトコンベア２５ａ〜２５ｃと、短冊形状板３を上側に吸引してベルトコンベア２５ａ〜２５ｃの下面に吸着固定する図示しない第２の吸引手段とを備える。 The transfer mechanism 23 sucks up the three rows of belt conveyors 25a to 25c provided in parallel above and downstream of the belt conveyors 24a to 24c of the sub-conveying mechanism 22 and the strip-shaped plate 3 to the upper side to convey the belt conveyor 25a. And a second suction means (not shown) that is adsorbed and fixed to the lower surface of .about.25c.
ベルトコンベア２５ａ〜２５ｃの上流寄りには、副搬送機構２２のベルトコンベア２４ａ〜２４ｃの下方からその間を通って上方に突出し、ベルトコンベア２４ａ〜２４ｃに吸着固定された短冊形状板３をベルトコンベア２５ａ〜２５ｃ側へ押し上げる押し上げ部材２６が設けられている。また、ベルトコンベア２５ａ〜２５ｃの下流寄りには、これらのベルトコンベアの上方からその間を通って下方に突出し、該ベルトコンベアに吸着固定された短冊形状板３を主搬送機構１３側へ押し下げる押し下げ部材２７が設けられている。 Near the upstream side of the belt conveyors 25a to 25c, the strip-shaped plate 3 that protrudes upward from below the belt conveyors 24a to 24c of the sub-transport mechanism 22 and is adsorbed and fixed to the belt conveyors 24a to 24c is attached to the belt conveyor 25a. A push-up member 26 that pushes up to the ˜25c side is provided. Further, on the downstream side of the belt conveyors 25a to 25c, a push-down member that protrudes downward from above the belt conveyors and pushes down the strip-shaped plate 3 adsorbed and fixed to the belt conveyors toward the main conveyance mechanism 13 side. 27 is provided.
載せ換え機構２３は、まず、副搬送機構２２のベルトコンベア２４ａ〜２４ｃによって搬送方向に対して傾斜した状態で搬送された短冊形状板３を、押し上げ部材２６に当接させて上方に押し上げ、前記第２の吸引手段によってベルトコンベア２５ａ〜２５ｃの下面に吸着して下流側へ搬送する。次に、載せ換え機構２３は、ベルトコンベア２５ａ〜２５ｃに吸着固定して搬送した短冊形状板３を、押し下げ部材２７に当接させて下方に押し下げ、前記第１の吸引手段によって主搬送機構１３のベルトコンベア２０ａ〜２０ｃの上面に吸着固定して下流側へ搬送する。 First, the repositioning mechanism 23 pushes the strip-shaped plate 3 conveyed in a state inclined with respect to the conveying direction by the belt conveyors 24a to 24c of the sub-conveying mechanism 22 to the push-up member 26 and pushes it upward. The second suction means attracts the lower surface of the belt conveyors 25a to 25c and conveys it to the downstream side. Next, the repositioning mechanism 23 causes the strip-shaped plate 3 conveyed by being attracted and fixed to the belt conveyors 25a to 25c to be brought into contact with the push-down member 27 and pushed downward, and the main conveying mechanism 13 by the first suction means. The belt conveyors 20a to 20c are adsorbed and fixed to the upper surfaces of the belt conveyors 20a to 20c and conveyed downstream.
このようにして、載せ換え機構２３は、副搬送機構２２で搬送された短冊形状板３を、主搬送機構１３上で、搬送方向に対して４５度傾斜して先行して搬送され隣り合う短冊形状板３ｂに対して長さ方向にずらした状態で、短冊形状板３ｂの側縁部３ｅに当接する位置に載置することができる。このとき、主搬送機構１３上の各短冊形状板３は、前記第１の吸引手段によってベルトコンベア２０ａ〜２０ｃの上面に吸着固定されることにより、搬送した短冊形状体３を、先行して搬送され隣り合う短冊形状板３ｂとその側縁部３ｅを合わせて接合することができる。そして、複数の短冊形状板３が側縁部３ｅを合わせて接合した結果、長尺状斜行単板５ａ〜５ｄを形成することができる。 In this way, the repositioning mechanism 23 allows the strip-shaped plate 3 transported by the sub-transport mechanism 22 to be transported in advance on the main transport mechanism 13 with an inclination of 45 degrees with respect to the transport direction. It can be placed at a position in contact with the side edge 3e of the strip-shaped plate 3b in a state shifted in the length direction with respect to the shaped plate 3b. At this time, each strip-shaped plate 3 on the main transport mechanism 13 is sucked and fixed to the upper surfaces of the belt conveyors 20a to 20c by the first suction means, thereby transporting the transported strip-shaped body 3 in advance. Adjacent strip-shaped plates 3b and their side edge portions 3e can be joined together. As a result of joining the plurality of strip-shaped plates 3 together with the side edge portions 3e, the elongated skewed single plates 5a to 5d can be formed.
図２に戻って、第１〜第３の板載置機構２１ａ〜２１ｃと隣り合う第２〜第４の板載置機構２１ｂ〜２１ｄとの間には、第１〜第３の結合手段１４ａ〜１４ｃと、第１〜第３の接着剤塗布手段１５ａ〜１５ｃとが設けられている。また、第４の板載置機構２１ｄの下流には、第４の結合手段１４ｄ及び圧締手段１６が設けられている。 Returning to FIG. 2, the first to third coupling units 14 a are provided between the first to third plate mounting mechanisms 21 a to 21 c and the second to fourth plate mounting mechanisms 21 b to 21 d adjacent to each other. To 14c and first to third adhesive application means 15a to 15c are provided. Further, a fourth coupling means 14d and a pressing means 16 are provided downstream of the fourth plate mounting mechanism 21d.
各結合手段１４ａ〜１４ｃは、長尺状斜行単板５ａ〜５ｄにおいて互いに接合された複数の短冊形状板３を結合する。前記結合には、図５（Ａ）に示すテープや糸等の索条２８ａ、図５（Ｂ）に示す逆Ｕ字形の止め金具２８ｂ等を用いることができる。 Each coupling means 14a-14c couples the plurality of strip-shaped plates 3 joined to each other in the elongated skewed single plates 5a-5d. For the connection, a strip 28a such as a tape or a thread shown in FIG. 5A, an inverted U-shaped stopper 28b shown in FIG. 5B, or the like can be used.
図６に示すように、各接着剤塗布手段１５ａ〜１５ｃは、複数の短冊形状板３が結合された長尺状斜行単板５ａ〜５ｃの上に接着剤１５ｄを塗布する。接着剤塗布手段１５ａ〜１５ｃとしては、例えばカーテンコーターを用いることができる。この場合には、主搬送機構１３の搬送方向と直交して主搬送機構１３を跨ぐようにカーテンコーターを設け、該カーテンコーターから長尺状斜行単板５ａ〜５ｃ上に接着剤１５ｄをカーテン状或いは滝状に落下させることにより、接着剤１５ｄを塗布することができる。接着剤１５ｄとしては、メラミン・フェノール共縮合樹脂系、水溶性フェノール樹脂系、メラミン・ユリア共縮系、ユリア・メラミン共縮系、非ホルマリン系等を適宜用いることができる。 As shown in FIG. 6, each adhesive application means 15a-15c apply | coats the adhesive 15d on the elongate skew single plate 5a-5c with which the some strip-shaped board 3 was couple | bonded. As the adhesive application means 15a to 15c, for example, a curtain coater can be used. In this case, a curtain coater is provided so as to straddle the main transport mechanism 13 perpendicular to the transport direction of the main transport mechanism 13, and the adhesive 15d is curtained from the curtain coater onto the long skew single plates 5a to 5c. The adhesive 15d can be applied by dropping it into a shape or a waterfall. As the adhesive 15d, a melamine / phenol cocondensation resin system, a water-soluble phenol resin system, a melamine / urea cocondensation system, a urea / melamine cocondensation system, a non-formalin system, or the like can be used as appropriate.
次に、図２及び図６を参照して、合板製造装置１１による合板２の製造方法について説明する。まず、第１の切断手段２９により、矩形の木製単板４をその繊維方向４ａが短冊の長さ方向になるように切断して、複数の短冊形状板３を生成する。得られた短冊形状板３を板供給手段１２ａ，１２ｂによって、第１〜第４の板載置機構２１ａ〜２１ｄに載せる。 Next, with reference to FIG.2 and FIG.6, the manufacturing method of the plywood 2 by the plywood manufacturing apparatus 11 is demonstrated. First, the first cutting unit 29 cuts the rectangular wooden veneer 4 so that the fiber direction 4a is in the length direction of the strip, thereby generating a plurality of strip-shaped plates 3. The obtained strip-shaped plate 3 is mounted on the first to fourth plate mounting mechanisms 21a to 21d by the plate supply means 12a and 12b.
次に、第１の板載置機構２１ａにより、第１の切断手段２９により生成された短冊形状板３を主搬送機構１３に載置する。このとき、主搬送機構１３上にはその搬送方向に対して左斜め４５度の角度で傾斜する複数の短冊形状板３が先行して搬送され、該複数の短冊形状板３は前記第１の吸着手段によりベルトコンベア２０ａ〜２０ｃの上面に吸着固定されている。第１の板載置機構２１ａが、先行して隣り合う短冊形状板３ｂに対して長さ方向にずらした状態で短冊形状板３ｂの側縁部３ｅに当接する位置に、短冊形状板３を載置することにより、該短冊形状板３を先行して隣り合う短冊形状板３ｂの側縁部３ｅに接合させる。この結果、複数の短冊形状板３が互いに接合した第１層の長尺状斜行単板５ａを形成することができる。 Next, the strip-shaped plate 3 generated by the first cutting means 29 is placed on the main transport mechanism 13 by the first plate placement mechanism 21 a. At this time, a plurality of strip-shaped plates 3 that are inclined at an angle of 45 degrees to the left with respect to the transport direction are transported on the main transport mechanism 13 in advance, and the plurality of strip-shaped plates 3 are the first strips 3. It is fixed to the upper surface of the belt conveyors 20a to 20c by suction means. The strip-shaped plate 3 is placed at a position where the first plate mounting mechanism 21a abuts on the side edge 3e of the strip-shaped plate 3b in a state of being shifted in the length direction with respect to the adjacent strip-shaped plate 3b. By mounting, the strip-shaped plate 3 is joined to the side edge 3e of the adjacent strip-shaped plate 3b in advance. As a result, it is possible to form the first layer of long skew single plate 5a in which a plurality of strip-shaped plates 3 are joined to each other.
次に、第１の結合手段１４ａにより、複数の短冊形状板３が接合された長尺状斜行単板５ａの各短冊形状板３を結合する。次に、第１の接着剤塗布手段１５ａにより、複数の短冊形状板３が結合された長尺状斜行単板５ａの上に接着剤１５ｄを塗布する。 Next, the strip-shaped plates 3 of the long skew single plate 5a to which the plurality of strip-shaped plates 3 are joined are coupled by the first coupling means 14a. Next, the first adhesive application unit 15a applies the adhesive 15d onto the long skew single plate 5a to which the plurality of strip-shaped plates 3 are coupled.
次に、搬送方向に対する傾斜角度を右斜め４５度とする以外は第１の板載置機構２１ａと同様にして、第２の板載置機構２１ｂにより、第１の切断手段２９により生成された短冊形状板３を、主搬送機構１３で搬送される第１の長尺状斜行単板５ａ上に載置する。このとき、第１の長尺状斜行単板５ａ上には、その搬送方向に対して右斜め４５度の角度で傾斜する複数の短冊形状板３が先行して搬送され、該複数の短冊形状板３は接着剤１５ｄにより第１の長尺状斜行単板５ａに接着されている。第１の板載置機構２１ａが、先行して隣り合う短冊形状板３ｂに対して長さ方向にずらした状態で短冊形状板３ｂの側縁部３ｅに当接する位置に、短冊形状板３を載置することにより、該短冊形状板３を先行して隣り合う短冊形状板３ｂの側縁部３ｅに接合させる。この結果、第１層の長尺状斜行単板５ａ上に、複数の短冊形状板３が互いに接合した第２層の長尺状斜行単板５ｂを形成することができる。 Next, it was generated by the first cutting means 29 by the second plate mounting mechanism 21b in the same manner as the first plate mounting mechanism 21a, except that the inclination angle with respect to the transport direction was set to 45 degrees diagonally to the right. The strip-shaped plate 3 is placed on the first long skew single plate 5 a that is transported by the main transport mechanism 13. At this time, a plurality of strip-shaped plates 3 inclined at an angle of 45 degrees to the right with respect to the transport direction are transported in advance on the first long skew single plate 5a. The shape plate 3 is bonded to the first long skew single plate 5a by an adhesive 15d. The strip-shaped plate 3 is placed at a position where the first plate mounting mechanism 21a abuts on the side edge 3e of the strip-shaped plate 3b in a state of being shifted in the length direction with respect to the adjacent strip-shaped plate 3b. By mounting, the strip-shaped plate 3 is joined to the side edge 3e of the adjacent strip-shaped plate 3b in advance. As a result, on the first layer of the long skew single plate 5a, the second layer of the long skew single plate 5b in which the plurality of strip-shaped plates 3 are joined to each other can be formed.
次に、第２の結合手段１４ｂにより、複数の短冊形状板３が接合された長尺状斜行単板５ｂの各短冊形状板３を結合する。次に、第２の接着剤塗布手段１５ｂにより、複数の短冊形状板３が結合された長尺状斜行単板５ｂの上に接着剤１５ｄを塗布する。 Next, each strip-shaped plate 3 of the long skew single plate 5b to which the plurality of strip-shaped plates 3 are joined is coupled by the second coupling means 14b. Next, the second adhesive application unit 15b applies the adhesive 15d onto the long skew single plate 5b to which the plurality of strip-shaped plates 3 are coupled.
次に、第２の板載置機構２１ｂと同様にして、第３の板載置機構２１ｃにより、第１の切断手段２９により生成された短冊形状板３を、主搬送機構１３で搬送される第２の長尺状斜行単板５ｂ上に載置する。この結果、第２層の長尺状斜行単板５ｂ上に、複数の短冊形状板３が互いに接合した第３層の長尺状斜行単板５ｃを形成することができる。 Next, similarly to the second plate mounting mechanism 21b, the strip-shaped plate 3 generated by the first cutting means 29 is transported by the main transport mechanism 13 by the third plate mounting mechanism 21c. It mounts on the 2nd elongate skewing single plate 5b. As a result, it is possible to form a third-layer long skew single plate 5c in which a plurality of strip-shaped plates 3 are joined to each other on the second layer long skew single plate 5b.
次に、第３の結合手段１４ｃにより、複数の短冊形状板３が接合された長尺状斜行単板５ｃの各短冊形状板３を結合する。次に、第３の接着剤塗布手段１５ｃにより、複数の短冊形状板３が結合された長尺状斜行単板５ｃの上に接着剤１５ｄを塗布する。 Next, the strip-shaped plates 3 of the long skew single plate 5c to which the plurality of strip-shaped plates 3 are joined are coupled by the third coupling means 14c. Next, the third adhesive application unit 15c applies the adhesive 15d onto the long skew single plate 5c to which the plurality of strip-shaped plates 3 are coupled.
次に、第１の板載置機構２１ａと同様にして、第４の板載置機構２１ｄにより、第１の切断手段２９により生成された短冊形状板３を、主搬送機構１３で搬送される第３の長尺状斜行単板５ｃ上に載置する。この結果、第３層の長尺状斜行単板５ｃ上に、複数の短冊形状板３が互いに接合した第４層の長尺状斜行単板５ｄを形成することができる。 Next, in the same manner as the first plate mounting mechanism 21a, the strip-shaped plate 3 generated by the first cutting means 29 is transported by the main transport mechanism 13 by the fourth plate mounting mechanism 21d. It mounts on the 3rd elongate skewing single plate 5c. As a result, on the third layer of the long skew single plate 5c, the fourth layer of long skew single plate 5d in which the plurality of strip-shaped plates 3 are joined to each other can be formed.
次に、第４の結合手段１４ｄにより、複数の短冊形状板３が接合された長尺状斜行単板５ｄの各短冊形状板３を結合する。 Next, each strip-shaped plate 3 of the long skew single plate 5d to which the plurality of strip-shaped plates 3 are joined is coupled by the fourth coupling means 14d.
以上により、複数の短冊形状板３が結合された第１層〜第４層の長尺状斜行単板５ａ〜５ｄを積層した長尺状積層体６を形成することができる。 By the above, the elongate laminated body 6 which laminated | stacked the elongate skew single plate 5a-5d of the 1st layer-the 4th layer to which the some strip-shaped board 3 was couple | bonded can be formed.
次に、第４の結合手段１４ｄの下流側に設けられた圧締手段１６を用いて長尺状積層体６を厚さ方向に加熱圧締することにより、接着された第１層〜第４層の長尺状斜行単板５ａ〜５ｄからなる長尺状合板７を形成することができる。 Next, the first laminated layer to the fourth layer are bonded by heat-pressing the long laminate 6 in the thickness direction using the pressing means 16 provided on the downstream side of the fourth coupling means 14d. It is possible to form a long plywood 7 composed of long slanting single plates 5a to 5d.
圧締手段１６としては、図６に示すように、例えば、それぞれ１組のローラ１６ａ，１６ｂに掛け回されて互いに対向し、図示しない加熱手段を備える１対の環状ベルト部材１６ｃ，１６ｃを用いることができる。両ローラ１６ａ，１６ｂの間には、環状ベルト部材１６ｃ，１６ｃを上下方向外方に付勢する複数のシリンダ１６ｄが搬送方向に並設され、両環状ベルト部材１６ｃ，１６ｃの間を通過する長尺状積層体６に対する圧締を制御することができる。 As the pressing means 16, for example, a pair of annular belt members 16c and 16c provided with heating means (not shown) that are respectively wound around a pair of rollers 16a and 16b and opposed to each other are used. be able to. Between the rollers 16a and 16b, a plurality of cylinders 16d for urging the annular belt members 16c and 16c outward in the vertical direction are juxtaposed in the conveying direction and are long enough to pass between the annular belt members 16c and 16c. The pressing with respect to the scale-like laminated body 6 can be controlled.
次に、圧締手段１６の下流側に設けられた第２の切断手段１７を用いて、長尺状合板７の両端部を搬送方向と平行に切断する。第２の切断手段１７は、長尺状合板７の搬送方向両側に配置されていることにより、搬送される長尺状合板７の両端間の長さ（これが合板２の横幅となる）を揃えることができる。第２の切断手段１７としては、例えば、電動鋸を用いることができる。 Next, both ends of the long plywood 7 are cut in parallel with the conveying direction by using the second cutting means 17 provided on the downstream side of the pressing means 16. The 2nd cutting means 17 arrange | positions the length (this becomes horizontal width of the plywood 2) between the both ends of the elongate plywood 7 conveyed by arrange | positioning at the conveyance direction both sides of the elongate plywood 7. be able to. For example, an electric saw can be used as the second cutting means 17.
次に、第２の切断手段１７の下流側に設けられた第３の切断手段１８を用いて、両端部が切断された長尺状合板７を、搬送方向において所望の長さ（これが合板２の長さとなる）に裁断する。第３の切断手段１８は、搬送方向に対して傾斜する方向に移動しながら切断することにより、所定の速度で搬送される長尺状合板７を、搬送方向に対して直角に裁断することができる。第３の切断手段１８としては、裁断機（カッター）あるいは電動鋸を用いることができる。また、前記長さは、合板２の使用目的に応じて種々の長さに設定することができる。 Next, using the third cutting means 18 provided on the downstream side of the second cutting means 17, the long plywood 7 whose both ends are cut is made to have a desired length (this is the plywood 2). The length of The third cutting means 18 can cut the long plywood 7 conveyed at a predetermined speed at a right angle to the conveying direction by cutting while moving in a direction inclined with respect to the conveying direction. it can. As the third cutting means 18, a cutter or a power saw can be used. The length can be set to various lengths according to the purpose of use of the plywood 2.
次に、第３の切断手段１８の下流側に設けられた研磨手段１９を用いて、所定の長さに裁断された長尺状合板７の表裏両面を研磨する。 Next, both the front and back surfaces of the long plywood 7 cut to a predetermined length are polished using a polishing means 19 provided on the downstream side of the third cutting means 18.
以上により、図１に示す左斜め木目の斜行単板１ａと、右斜め木目の斜行単板１ｂと、右斜め木目の斜行単板１ｃと、左斜め木目の斜行単板１ｄとが積層され、所望の長さ及び横幅を有する合板２を得ることができる。得られた合板２を、さらに図示しない第４の切断手段によって裁断することにより所望の寸法に分割してもよい。 As described above, the skewed single plate 1a of the left diagonal wood, the skewed single plate 1b of the right diagonal wood, the skewed single plate 1c of the right diagonal wood, and the skewed single plate 1d of the left diagonal wood shown in FIG. Can be obtained, and a plywood 2 having a desired length and width can be obtained. The obtained plywood 2 may be further divided into desired dimensions by cutting with a fourth cutting means (not shown).
本実施形態の製造方法によれば、短冊形状板３を結合した長尺状斜行単板５を複数積層し接着した長尺状合板７を形成した後に、所望の長さ及び横幅となるように裁断して合板２とするので、種々の所望の長さを備える合板を連続的に製造することができる。また、合板２を構成する各層の斜行単板１ａ，１ｂ，１ｃ，１ｄは、複数の短冊形状板３の側縁部３ｅを結合して形成されているので、木目が切断されることがなく優れた強度を備える合板２を製造することができる。 According to the manufacturing method of the present embodiment, after forming a long plywood 7 in which a plurality of long slanting single plates 5 combined with strip-shaped plates 3 are laminated and bonded together, a desired length and width are obtained. Therefore, the plywood 2 can be continuously manufactured with various desired lengths. Further, the skewed single plates 1a, 1b, 1c, and 1d of each layer constituting the plywood 2 are formed by connecting the side edge portions 3e of the plurality of strip-shaped plates 3 so that the grain may be cut. The plywood 2 having excellent strength can be produced.
本実施形態では、合板２の各斜行単板１ａ〜１ｄを構成する各短冊形状板３は、その繊維方向３ａが斜行単板１ａ〜１ｄの長手方向Ｌに対して４５度の角度で傾斜する場合について説明しているが、４５度に限らず、長手方向Ｌに対して０度よりも大きく且つ９０度以下の範囲の任意の角度とすることができる。また、その角度は、各板載置機構２１ａ〜２１ｄの副搬送機構２２のベルトコンベア２４ａ〜２４ｃの回転速度を変更することにより、変更することができる。 In this embodiment, each strip-shaped plate 3 constituting each skewed single plate 1a to 1d of the plywood 2 has a fiber direction 3a at an angle of 45 degrees with respect to the longitudinal direction L of the skewed single plates 1a to 1d. Although the case where it inclines is demonstrated, it is not restricted to 45 degree | times, It can be set as the arbitrary angles of the range larger than 0 degree | times and below 90 degree | times with respect to the longitudinal direction L. FIG. Further, the angle can be changed by changing the rotation speed of the belt conveyors 24a to 24c of the sub-transport mechanism 22 of each of the plate placement mechanisms 21a to 21d.
また、本実施形態では、複数の短冊形状板３を接合した長尺状斜行単板５ａ〜５ｄを、結合手段１４ａ〜１４ｃで結合するようにしているが、該単板５ａ〜５ｄを構成する各短冊形状板３の接合状態を保持することができる場合には、結合手段１４ａ〜１４ｃを省略可能である。 Further, in the present embodiment, the long slanting single plates 5a to 5d obtained by joining a plurality of strip-shaped plates 3 are coupled by the coupling means 14a to 14c, but the single plates 5a to 5d are configured. When the joining state of each strip-shaped plate 3 to be held can be maintained, the coupling means 14a to 14c can be omitted.
また、さらに、図７（Ａ）に示すように、短冊形状板３を主搬送機構１３に載せる前に、第５の切断手段３１によって、短冊形状板３の長さ方向の両端部を繊維方向３ａに対して４５度の角度で裁断してもよい。この場合には、裁断により形成された辺を底辺とし、裁断前の短冊形状板３の側縁を斜辺とする略平行四辺形状の短冊形状板３ｃを得ることができる。 Furthermore, as shown in FIG. 7A, before the strip-shaped plate 3 is placed on the main transport mechanism 13, the both ends in the length direction of the strip-shaped plate 3 are placed in the fiber direction by the fifth cutting means 31. You may cut | judge at an angle of 45 degree | times with respect to 3a. In this case, it is possible to obtain a substantially parallelogram-shaped strip-shaped plate 3c in which the side formed by cutting is a bottom side and the side edge of the strip-shaped plate 3 before cutting is a hypotenuse.
そして、得られた略平行四辺形状の短冊形状板３ｃを各板載置機構２１によって主搬送機構１３に並べて積み重ねる。このとき、短冊形状板３ｃを第１の板載置機構２１ａ及び第４の板載置機構２１ｄで搬送し、該短冊形状板３ｃを反転させた短冊形状板３ｄを、第２の板載置機構２１ｂ及び第３の板載置機構２１ｃで搬送する。これにより、図７（Ｂ）に示すように、搬送方向に対して左斜め４５度に傾斜する短冊形状板３ｃと、右斜め４５度に傾斜する短冊形状板３ｄと、右斜め４５度に傾斜する短冊形状板３ｄと、左斜め４５度に傾斜する短冊形状板３ｃとを下から順に積み重ね、長尺状積層体６を形成する。このとき、長尺状積層体６において、略平行四辺形状の各短冊形状板３ｃ，３ｄは、それぞれの底辺が揃った状態で積み重ねられている。 Then, the obtained substantially parallelogram-shaped strip-shaped plates 3 c are arranged and stacked on the main transport mechanism 13 by the respective plate mounting mechanisms 21. At this time, the strip-shaped plate 3c is transported by the first plate mounting mechanism 21a and the fourth plate mounting mechanism 21d, and the strip-shaped plate 3d obtained by inverting the strip-shaped plate 3c is mounted on the second plate mounting. It is transported by the mechanism 21b and the third plate mounting mechanism 21c. As a result, as shown in FIG. 7B, the strip-shaped plate 3c inclined at 45 ° to the left with respect to the transport direction, the strip-shaped plate 3d inclined at 45 ° to the right, and inclined at 45 ° to the right. The strip-shaped plate 3d and the strip-shaped plate 3c inclined at 45 degrees to the left are stacked in order from the bottom to form the long laminate 6. At this time, in the long laminate 6, the substantially parallelogram-shaped strip-shaped plates 3 c and 3 d are stacked with their bottoms aligned.
次に、得られた長尺状積層体６を圧締手段１６により加熱圧締することにより長尺状合板７を形成する。次に、長尺状合板７を、第２の切断手段１７によって両端部を搬送方向と平行に切断した後に、第３の切断手段１８によって搬送方向において所望の長さに裁断する。さらに、長尺状合板７を研磨手段１９によって表裏両面を研磨することにより、図１に示す合板２を得ることができる。 Next, the obtained long laminate 6 is heated and pressed by the pressing means 16 to form the long plywood 7. Next, the long plywood 7 is cut at both ends in parallel with the transport direction by the second cutting means 17 and then cut to a desired length in the transport direction by the third cutting means 18. Further, the plywood 2 shown in FIG. 1 can be obtained by polishing the front and back surfaces of the long plywood 7 with the polishing means 19.
短冊形状板３を第５の切断手段３１によって略平行四辺形状の短冊形状板３ｃ，３ｄとする方法によれば、略平行四辺形状の短冊形状板３ｃ，３ｄをそれぞれの底辺が揃った状態で積み重ねて長尺状積層体６を形成することができる。これにより、長尺状積層体６を圧締手段１６によって加熱圧締するときに、長尺状積層体６全体を均等に圧締することができる。 According to the method in which the strip-shaped plate 3 is made into the substantially parallelogram-shaped strip-shaped plates 3c, 3d by the fifth cutting means 31, the substantially parallelogram-shaped strip-shaped plates 3c, 3d are in a state where the bottoms thereof are aligned. The long laminated body 6 can be formed by stacking. Thereby, when the elongate laminated body 6 is heat-clamped by the pressing means 16, the whole elongate laminated body 6 can be clamped equally.
また、本実施形態では、左斜め木目の斜行単板１ａと、右斜め木目の斜行単板１ｂと、右斜め木目の斜行単板１ｃと、左斜め木目の斜行単板１ｄとが積層された４層構造の合板２を製造する場合について説明しているが、さらに横木目の単板が積層された合板を製造することも可能である。例えば、図８（Ａ）に示すように、合板２（図１）の右斜め木目の斜行単板１ｂと右斜め木目の斜行単板１ｃとの間に、横木目の直交単板１ｅを積層した５層構造の合板２ａとしてもよい。 Further, in the present embodiment, the skewed single plate 1a of the left diagonal wood, the skewed single plate 1b of the right diagonal wood, the skewed single plate 1c of the right diagonal wood, and the skew single plate 1d of the left diagonal wood Although the case where the plywood 2 having a four-layer structure is manufactured has been described, it is also possible to manufacture a plywood in which cross-cut single plates are laminated. For example, as shown in FIG. 8 (A), an orthogonal veneer 1e of a horizontal grain between a skewed veneer 1b and a skewed veneer 1c of a right diagonal wood of a plywood 2 (FIG. 1). It is good also as the plywood 2a of the 5 layer structure which laminated | stacked.
〔第２実施形態〕
次に、本実施形態では、図８（Ａ）に示す５層構造の合板２ａを製造する方法について説明する。第１実施形態の製造方法と同様に行う部分については、説明を省略する。合板２ａを製造するには、図２の合板製造装置１の第２の接着剤塗布手段１５ｂと第３の板載置機構２１ｃとの間に、図示しない第５の板載置機構、第５の結合手段及び第４の接着剤塗布手段を設けるようにする。
[Second Embodiment]
Next, in this embodiment, a method for manufacturing the plywood 2a having the five-layer structure shown in FIG. The description of the parts performed in the same manner as the manufacturing method of the first embodiment is omitted. In order to manufacture the plywood 2a, a fifth plate mounting mechanism (not shown), a fifth plate mounting mechanism 21c between the second adhesive applying unit 15b and the third plate mounting mechanism 21c of the plywood manufacturing apparatus 1 of FIG. And a fourth adhesive applying means.
前記第５の板載置機構は、図４の各ベルトコンベア２４ａ〜２４ｃの回転速度が同一速度に設定されている。これにより、前記第５の板載置機構は、繊維方向３ａがベルトコンベア２４ａ〜２４ｃと平行となるように該ベルトコンベア上に載置された短冊形状板３を、その向きを維持した状態で、すなわち、主搬送機構１３の搬送方向に対して繊維方向３ａが直交するように主搬送機構１３に載置することができる。 In the fifth plate mounting mechanism, the rotation speeds of the belt conveyors 24a to 24c in FIG. 4 are set to the same speed. Thus, the fifth plate placement mechanism maintains the orientation of the strip-shaped plate 3 placed on the belt conveyor so that the fiber direction 3a is parallel to the belt conveyors 24a to 24c. That is, it can be placed on the main transport mechanism 13 so that the fiber direction 3 a is orthogonal to the transport direction of the main transport mechanism 13.
まず、第１実施形態の製造方法と同様に、主搬送機構１３上で第１層の長尺状斜行単板５ａ及び第２層の長尺状斜行単板５ｂを積み重ねる。次に、第２の接着剤塗布手段１５ｂにより第２層の長尺状斜行単板５ｂの上に接着剤１５ｄを塗布した後に、前記第５の板載置機構により、第１の切断手段２９により生成された短冊形状板３を、主搬送機構１３で搬送される第２の長尺状斜行単板５ｂ上に載置する。このとき、短冊形状板３を、先行して隣り合う短冊形状板３ｂの側縁部３ｅに当接する位置に、その搬送方向に対して繊維方向が直交する、すなわち９０度の角度で傾斜するように載置する。この結果、第２層の長尺状斜行単板５ｂ上に、隣り合う短冊形状板３が互いに接合した図示しない第３層の長尺状直交単板を形成することができる。 First, similarly to the manufacturing method of the first embodiment, the first layer of long skew single plate 5 a and the second layer of long skew single plate 5 b are stacked on the main transport mechanism 13. Next, after the adhesive 15d is applied on the long slanting single plate 5b of the second layer by the second adhesive applying means 15b, the first cutting means is applied by the fifth plate mounting mechanism. The strip-shaped plate 3 generated by 29 is placed on the second elongated skew single plate 5b transported by the main transport mechanism 13. At this time, the strip-shaped plate 3 is inclined at an angle of 90 degrees at the position where the strip-shaped plate 3 is in contact with the side edge 3e of the adjacent strip-shaped plate 3b. Placed on. As a result, it is possible to form a third-layer long orthogonal single plate (not shown) in which the adjacent strip-shaped plates 3 are joined to each other on the long-level skew single plate 5b of the second layer.
次に、前記第５の結合手段により、複数の短冊形状板３が接合された前記長尺状直交単板の各短冊形状板３を結合する。 Next, the strip-shaped plates 3 of the long orthogonal single plates to which the plurality of strip-shaped plates 3 are joined are coupled by the fifth coupling means.
次に、前記第４の接着剤塗布手段により、前記長尺状直交単板の上に接着剤１５ｄを塗布した後に、第３層の長尺状斜行単板５ｃ及び第４層の長尺状斜行単板５ｄを積み重ねる。これにより、第１層の長尺状斜行単板５ａと第２層の長尺状斜行単板５ｂと前記長尺状直交単板と第３層の長尺状斜行単板５ｃと第４層の長尺状斜行単板５ｄとからなる長尺状積層体６を得ることができる。 Next, after the adhesive 15d is applied onto the long orthogonal single plate by the fourth adhesive applying means, the third layer of long skew single plate 5c and the fourth layer of long The slanting single plates 5d are stacked. Thus, the first layer of long skew single plate 5a, the second layer of long skew single plate 5b, the long orthogonal single plate, and the third layer of long skew single plate 5c, It is possible to obtain a long laminate 6 composed of the fourth layer of long skew single plate 5d.
次に、第１実施形態の製造方法と同様に、得られた長尺状積層体６を圧締手段１６により圧締して長尺状合板７を形成し、さらに第２の切断手段１７及び第３の切断手段１８により長尺状合板７を裁断する。以上により、図８（Ａ）に示すように、合板２（図１）の右斜め木目の斜行単板１ｂと右斜め木目の斜行単板１ｃとの間に横木目の直交単板１ｅを積層した５層構造の合板２ａを得ることができる。 Next, similarly to the manufacturing method of the first embodiment, the obtained long laminate 6 is pressed by the pressing means 16 to form the long plywood 7, and the second cutting means 17 and The long plywood 7 is cut by the third cutting means 18. As described above, as shown in FIG. 8 (A), the orthogonal single plate 1e of the horizontal grain between the skewed single plate 1b and the skewed single plate 1c of the right diagonal wood of the plywood 2 (FIG. 1). Can be obtained.
得られた合板２ａは、斜行単板１ａ，１ｂ，１ｃ，１ｄと直交単板１ｅとが積層されていることにより、斜行単板１ａ，１ｂ，１ｃ，１ｄのみを積層した合板２と比較して、種々の方向からの応力、特に縦方向からの応力に対して耐えることができる。 The obtained plywood 2a is formed by laminating the skewed single plates 1a, 1b, 1c, and 1d and the orthogonal single plate 1e, so that the plywood 2 laminated only with the skewed single plates 1a, 1b, 1c, and 1d In comparison, it can withstand stress from various directions, in particular stress from the longitudinal direction.
また、斜行単板と直交単板とが積層された合板としては、図８（Ｂ）に示すように、合板２（図１）の斜行単板１ａ側に直交単板１ｅを積層し、斜行単板１ｄ側に直交単板１ｆを積層した６層構造の合板２ｂとすることも可能である。 Further, as a plywood in which the skew single plate and the orthogonal single plate are laminated, as shown in FIG. 8B, the orthogonal single plate 1e is laminated on the skew single plate 1a side of the plywood 2 (FIG. 1). The plywood 2b having a six-layer structure in which the orthogonal single plates 1f are stacked on the skewed single plate 1d side can also be used.
また、第１実施形態及び第２実施形態の製造方法により製造される図１に示す４層構造の合板２、図８（Ａ）に示す５層構造の合板２ａ、及び図８（Ｂ）に示す６層構造の合板２ｂは、いずれも、各層の単板が、その繊維方向が厚さ方向の中心線を対称軸として線対称となるように配置されている。これにより、合板２，２ａ，２ｂは、各層の単板１ａ，１ｂ，１ｃ，１ｄ，１ｅ，１ｆの反り返りを防ぐことができる。 Further, the four-layer plywood 2 shown in FIG. 1 manufactured by the manufacturing method of the first embodiment and the second embodiment, the five-layer plywood 2a shown in FIG. 8A, and FIG. 8B. In the 6-layer plywood 2b shown, the single plates of each layer are arranged so that the fiber direction is line-symmetric with the center line in the thickness direction as the axis of symmetry. Thereby, the plywood 2, 2a, 2b can prevent the single plate 1a, 1b, 1c, 1d, 1e, 1f of each layer from warping.
以上のとおり、第１実施形態及び第２実施形態では、４〜６層構造の合板２，２ａ，２ｂの製造方法について説明しているが、複数枚の単板が積層され少なくとも２枚が斜行単板である合板についても同様に製造することができ、斜行単板は任意の枚数とすることができる。 As described above, in the first embodiment and the second embodiment, the manufacturing method of the plywood 2, 2a, 2b having a 4-6 layer structure is described. However, a plurality of single plates are laminated and at least two are inclined. A plywood which is a row single plate can be manufactured in the same manner, and the number of skew single plates can be any number.
１ａ，１ｂ，１ｃ，１ｄ…斜行単板、 １ｅ，１ｆ…直交単板、 ２，２ａ，２ｂ…合板、 ３…短冊形状板、 ３ａ…短冊形状板の繊維方向、３ｅ…側縁部、 ４…木製単板、 ４ａ…木製単板の繊維方向、 ５ａ，５ｂ，５ｃ，５ｄ…長尺状斜行単板、 ６…長尺状積層体、 ７…長尺状合板、 １５ｄ…接着剤。 1a, 1b, 1c, 1d ... skew single plate, 1e, 1f ... orthogonal single plate, 2, 2a, 2b ... plywood, 3 ... strip-shaped plate, 3a ... fiber direction of strip-shaped plate, 3e ... side edge, 4 ... wood veneer 4a ... fiber direction of wood veneer 5a, 5b, 5c, 5d ... long slanting veneer 6 ... long laminate, 7 ... long plywood, 15d ... adhesive .
Claims (5)
木製単板を繊維方向が長さ方向になるように短冊状に切断して複数の短冊形状板を得る第１工程と、
該第１工程で得られた短冊形状板を、長さ方向から傾いた方向に移動して先行し隣り合う短冊形状板に対して長さ方向にずらした状態で該短冊形状板の側縁に接合することにより、長尺状斜行単板を形成する第２工程と、
該長尺状斜行単板の上面に接着剤を塗布し、該接着剤が塗布された長尺状斜行単板上で、該第１工程で得られた短冊形状板を、長さ方向が該長尺状斜行単板の移動方向に交差するように配置され、該長尺状斜行単板の移動方向と同一方向に移動して先行し隣り合う短冊形状板に対して長さ方向にずらした状態で該短冊形状板の側縁に接合することにより、一の長尺状斜行単板の上に他の長尺状斜行単板を積層することを１回以上行う第３工程と、
該第３工程で複数の長尺状斜行単板が積層された長尺状積層体を厚さ方向に圧締することにより、接着された複数の長尺状斜行単板からなる長尺状合板を形成する第４工程と、
第４工程で得られた長尺状合板を移動方向において所望の長さに裁断して合板を形成する第５工程とを備えることを特徴とする合板の製造方法。 A method for producing a plywood comprising a plurality of wooden veneers, wherein at least two veneers are skewed veneers whose fiber direction is inclined with respect to the length direction,
A first step of obtaining a plurality of strip-shaped plates by cutting a wooden veneer into strips so that the fiber direction is in the length direction;
The strip-shaped plate obtained in the first step is moved in a direction inclined from the length direction and is shifted in the length direction with respect to the adjacent strip-shaped plate, and is moved to the side edge of the strip-shaped plate. A second step of forming a long skew single plate by joining;
An adhesive is applied to the upper surface of the long skew single plate, and the strip-shaped plate obtained in the first step is applied to the long skew single plate coated with the adhesive in the length direction. Is arranged so as to cross the moving direction of the long skew single plate, and moves in the same direction as the moving direction of the long skew single plate and has a length relative to the preceding and adjacent strip-shaped plate. By joining to the side edge of the strip-shaped plate in a state shifted in the direction, the other long skew single plate is laminated on one long skew single plate at least once. 3 steps,
A long length composed of a plurality of long slanting single plates adhered by pressing in a thickness direction a long laminated body in which a plurality of long slanting single plates are laminated in the third step. A fourth step of forming a plywood;
A plywood manufacturing method comprising: a fifth step of forming a plywood by cutting the long plywood obtained in the fourth step into a desired length in the moving direction.
前記第３工程において、前記接着剤が塗布された長尺状斜行単板上で、前記第１工程で得られた短冊形状板を、該長尺状斜行単板の各短冊形状板と交差するように配置することを特徴とする合板の製造方法。 In the manufacturing method of the plywood of Claim 1,
In the third step, the strip-shaped plate obtained in the first step on the long skewed single plate coated with the adhesive, each strip-shaped plate of the long skew single plate A method for producing plywood, wherein the plywoods are arranged so as to cross each other.
前記第３工程において、前記接着剤が塗布された長尺状斜行単板上で、前記第１工程で得られた短冊形状板を、該長尺状斜行単板の移動方向に対して直交するように配置することを特徴とする合板の製造方法。 In the manufacturing method of the plywood of Claim 1,
In the third step, the strip-shaped plate obtained in the first step on the elongated skewed single plate coated with the adhesive is moved in the moving direction of the elongated skewed single plate. A method for producing plywood, wherein the plywoods are arranged so as to be orthogonal to each other.
前記第３工程において、各長尺状斜行単板の繊維方向が厚さ方向の中心線を対称軸として線対称となるように各長尺状斜行単板を積層した長尺状積層体を得るように、前記接着剤が塗布された長尺状斜行単板上で前記第１工程で得られた短冊形状板を配置して、前記一の長尺状斜行単板の上に他の長尺状斜行単板を積層することを３回以上行うことを特徴とする合板の製造方法。 In the manufacturing method of the plywood of any one of Claims 1-3,
In the third step, the long laminated body in which the long oblique single plates are laminated so that the fiber directions of the long oblique single plates are line symmetric with respect to the center line in the thickness direction as the symmetry axis. So that the strip-shaped plate obtained in the first step is disposed on the elongated skewed veneer coated with the adhesive, on the one elongated skewed veneer A method for manufacturing a plywood, comprising laminating other long skew single plates three or more times.
前記第１工程において、前記複数の短冊形状板を得た後に、該短冊形状板の長さ方向の両端部を前記移動方向と平行に裁断し、
前記第２工程及び前記第３工程において、該第１工程で得られた短冊形状板を、前記先行し隣り合う短冊形状板と長さ方向の端部を一致させて該短冊形状板の側縁に接合することを特徴とする合板の製造方法。 In the manufacturing method of the plywood of any one of Claims 1-4,
In the first step, after obtaining the plurality of strip-shaped plates, the both ends in the length direction of the strip-shaped plates are cut in parallel with the moving direction,
In the second step and the third step, the strip-shaped plate obtained in the first step is aligned with the preceding and adjacent strip-shaped plate in the end in the length direction, and the side edge of the strip-shaped plate. A method for manufacturing a plywood, characterized in that the plywood is joined.
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