JP2008126572A - Laminated wood and method for production of laminated wood - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminated wood whose dimensional change accompanying deformation or shrinkage is reduced and which can simply be produced by reducing the number of processes, and to provide its production method. <P>SOLUTION: The laminated wood 10 comprises a first wood layer 11, a second wood layer 12 and an adhesive layer 3 provided therebetween. The first wood layer 11 is formed by setting in line, a plurality of first woods 1 with long square-column shape, with fibrous direction thereof nearly coinciding with a longitudinal direction, and with almost the same thickness without interposing an adhesive layer in a width direction. The second wood layer 12 is laminated on the first wood layer 11 in a thickness direction and formed by setting in line, a plurality of the second woods 2 with the long square-column shape, with fibrous direction thereof nearly coinciding with a longitudinal direction, and with almost the same thickness, while arranging their longitudinal direction orthogonal to that of the first woods 1 without interposing the adhesive layer in the width direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a laminated wood and a method for producing the laminated wood, and in particular, a laminated wood in which slats or small squares are assembled in the width direction and laminated in the thickness direction, and the laminated wood It relates to a manufacturing method.

  Conventionally, a laminated material in which a plurality of saw plates or small square materials are bonded and laminated in parallel to the fiber direction is used as a core material for doors and walls, as a construction material for staircase members, window frames, floor edges, etc. It is used as structural materials such as girders and beams, or as furniture materials.

  Such laminated lumber is less prone to cracking, warping, distortion, etc. compared to lumber wood, dimensional change due to shrinkage is small, and cutting off defective parts such as nodes at the stage of forming a plate or small square wood It has various advantages, such as being able to manufacture laminated timber of a size that is not limited by the diameter and length of raw wood, and being able to reduce costs compared to rare timber lumber.

  Conventional laminated lumber includes not only those in which the laminated plates or small-angled materials are bonded and assembled only in the thickness direction, but also those in which they are bonded and assembled in the width direction as well. Is also wider. In general, the laminated material assembled in the thickness direction and the width direction is generally formed by adhering a plurality of saw plates or small-angle materials in the width direction to form one layer, and pressing as necessary. It is manufactured through a process in which the thickness of the layer is made uniform by treatment and scratching, a plurality of layers thus formed are bonded in the thickness direction, and the whole is pressed.

  The above prior art is publicly implemented, and the applicant has not found a document describing this prior art at the time of filing this application.

  However, the conventional laminated timber has a degree of deformation such as warpage and distortion, and dimensional changes accompanying shrinkage are suppressed, but they are still not small and further improvement is desired. It was rare. Moreover, the conventional laminated material laminated | stacked in the width direction and the thickness direction had many problems at the time of the manufacture, and there existed a problem that a labor and time were required and cost increased.

  Therefore, in view of the above situation, the present invention provides a laminated wood that can reduce dimensional changes due to deformation and shrinkage and can be easily manufactured by reducing the number of steps, and a method for producing the laminated wood. It is to be an issue.

  In order to solve the above-mentioned problems, the laminated wood according to the present invention is described as follows: “A plurality of long prismatic first woods having substantially the same thickness and substantially the same fiber direction as the longitudinal direction are adhesive layers in the width direction. First wood layers arranged without intervening, and laminated in the thickness direction with the first wood layers, and a plurality of long prismatic second pillars having substantially the same thickness with the fiber direction substantially matching the longitudinal direction. A second wood layer in which two woods have their longitudinal direction orthogonal to the longitudinal direction of the first wood and are arranged in the width direction without an adhesive layer; the second wood layer and the first wood An adhesive layer provided between the layers ”.

  The wood species of “first wood” and “second wood” are not particularly limited, and for example, conifers such as cedar, cypress, and larch can be used. The “first wood” and the “second wood” may be the same type of wood or different types of wood.

  Here, the “longitudinal direction” of the first wood refers to the direction having the longest length component among the three-dimensional length components constituting the “long prismatic shape”. In addition, among the length components in two directions orthogonal to the longitudinal direction, which is referred to as “thickness” and which is referred to as “width” is a length that is set to be substantially the same in the plurality of first woods. The thickness component is referred to as “thickness” and the remaining length component is referred to as “width”. The length of “thickness” and “width” is not limited. In addition, as long as the “thickness” is substantially the same for the plurality of first woods, the other length components may not necessarily be aligned. The use of the terms “longitudinal direction”, “thickness” and “width” in the second wood is the same as in the case of the first wood, but the thickness of the first wood and the thickness of the second wood. Are not required to have substantially the same setting. In addition, even if the first wood and the second wood are lumbered into a “long prismatic shape” having a predetermined dimension, the length of the predetermined dimension is adjusted in the longitudinal direction or the width direction by a technique such as a finger joint. It may be a squirrel prism shape.

  As the “adhesive”, a known adhesive such as a resorcinol resin, an aqueous polymer isocyanate resin, a melamine resin, a urea resin, or a phenol resin can be used. Further, “without an adhesive layer in the width direction” means that no adhesive layer is intentionally provided, for example, between the first wood layer and the second wood layer. It does not exclude even the adhesive layer formed by slightly exuding the adhesive of the adhesive layer provided in the gap in the width direction of the first wood or the second wood.

  The number of layers in which the first wood layer and the second wood layer are laminated in the thickness direction is not particularly limited, and may be an even layer or an odd layer. For example, the first wood layer, the second wood layer, the wood three-layer structure laminated in the order of the first wood layer, the first wood layer, the second wood layer, the first wood layer, the second wood layer are laminated in this order. It can be a wood four-layer structure. In addition, a flat surface material is further provided via an adhesive layer on one or both of the outermost surfaces in the thickness direction of the laminated first wood layer and second wood layer. It can also be configured. In addition, the number of layers when referred to as “wood three-layer structure” and “wood four-layer structure” is the number of layers composed of the first wood and the second wood, and the adhesive layer is the number of layers. Not counting.

  Therefore, according to the present invention, since the first prism and the second timber in the shape of a long prism are laminated with their longitudinal directions orthogonal to each other, the first timber in each of the first timber layer and the second timber layer. Even if the two timbers are not bonded to each other in the width direction, the adhesive in the thickness direction and the bonding in the width direction are performed by the adhesive layer provided between the first timber layer and the second timber layer. It has a configuration. Thereby, a plurality of saw plates or small square materials are first bonded in the width direction to form one layer, compared to a conventional laminated material manufactured by bonding a plurality of formed layers in the thickness direction, The laminated wood has a simple configuration and can be easily manufactured with a small number of steps.

  Also, as in the case of conventional laminated lumber, an adhesive layer is provided not only between the first wood layer and the second wood layer but also at the boundary in the width direction between the first woods and between the second woods. If so, the deformation and shrinkage of individual timbers will affect adjacent timbers. That is, the sum total of the deformation and shrinkage of the individual first wood and second wood appears as deformation and shrinkage of the entire laminated wood. On the other hand, in the present invention, since the first wood and the second wood are not bonded in the width direction, even if deformation or shrinkage occurs in each of the first wood and the second wood, the adjacent wood It is absorbed and relaxed by a slight gap between adjacent timbers. Thereby, it becomes possible to reduce the deformation | transformation and shrinkage | contraction as the whole laminated wood from the conventional laminated material.

  Furthermore, in the present invention, the first wood and the second wood, in which the fiber directions are substantially coincident with the longitudinal direction, are laminated so that the longitudinal directions thereof are orthogonal to each other. The fiber directions are orthogonal. Here, the shrinkage rate due to drying of the wood is small in the fiber direction, but larger in the direction orthogonal to the fiber direction. Therefore, in the present invention, the force that the one of the first wood and the second wood tries to dry shrink in the direction orthogonal to the fiber direction matches the fiber direction that is hard to shrink in the direction in which the force acts. This suppresses the shrinkage of the laminated wood as a whole. In addition, wood exhibits a large strength in the fiber direction against compression by a load. Therefore, the laminated wood of the present invention exhibits a high compressive strength regardless of the direction in which the load is applied when used, the longitudinal direction of the first wood, or the longitudinal direction of the second wood. The degree of freedom in the direction of use is high, and it is versatile.

  Next, the manufacturing method of the laminated wood according to the present invention is described as follows: “A plurality of long prismatic first woods having substantially the same thickness and substantially the same fiber direction as the longitudinal direction can be formed without applying an adhesive. Applying the adhesive only to the front and back surfaces of a plurality of long prismatic second timbers having substantially the same thickness and having the fiber direction substantially coincided with the longitudinal direction, the first timber arranging step arranged in the direction, A second wood adhesion arranging step of arranging the longitudinal direction on the first wood in the width direction so as to be orthogonal to the longitudinal direction of the first wood, and a plurality of the first wood without applying an adhesive A first wood bonding and arranging step of arranging a longitudinal direction on the second wood in a width direction perpendicular to the longitudinal direction of the second wood, and stacking the first wood and the second wood. And a pressing step of pressing in the thickness direction ”.

  “Front and back surfaces” refers to a pair of side surfaces orthogonal to the thickness direction. Also, “Apply adhesive only to the front and back surfaces” means that the adhesive is not intentionally applied to the four side surfaces except “front and back surfaces”. It does not exclude the case where the agent adheres to the four side surfaces due to dripping. The adhesive can be applied by a known appropriate method such as a spreader, an extruder, a brush, or a roller. For example, an adhesive applicator configured by a pair of rollers rotating in opposite directions is used. Then, by passing the wood between the pair of rollers, the adhesive can be simultaneously applied to the “front and back surfaces”.

  The “pressing step” can be performed using a known cold press machine or hot press machine, and may be used in combination with a curing treatment of the adhesive by high frequency. Moreover, it can also carry out by the method of fastening a screw clamp using a torque wrench. Note that the pressure to be pressed can be appropriately set in consideration of the type of wood, the thickness, the type of adhesive, the pressing temperature, the number of layers, and the like.

  In other words, the present invention is a method of laminating a plurality of wood layers laminated in the thickness direction by applying an adhesive to the front and back surfaces every other layer. A plurality of line-up steps can be provided. For example, if the second wood adhesion arranging step and the first wood adhesion arranging step are added the same number of times, the layer constituted by the first wood and the layer constituted by the second wood are divided into five layers, seven layers, etc. Laminated wood having an odd number of layers is produced. For example, the manufacturing method of the present invention includes a first wood bonding step, a second wood bonding row step, a first wood bonding row step, a second wood bonding row step, a first wood bonding row step, and a pressure. By constituting in the order of the fastening process, a laminated wood having a wood five-layer structure can be manufactured.

  According to the present invention, the step of applying the adhesive is only the second wood bonding row step, in which the first wood and the second wood are respectively arranged in the width direction and laminated in the thickness direction, Laminated wood can be manufactured by a simple method of pressing the whole in the thickness direction. As a result, a plurality of saw plates or small squares are bonded in the width direction to form a single layer, and if necessary, the thickness of the layer is made uniform by pressing or scoring. Compared to the conventional method of manufacturing laminated gluing, in which a plurality of materials are bonded in the thickness direction, and the whole is pressed down, the labor, time, and cost are reduced by an extremely simple method. Laminated wood that exhibits the effects can be manufactured.

  In addition, the method for manufacturing laminated wood according to the present invention includes a "first surface material installation step of installing a flat plate-shaped first surface material, and a plurality of lengths having substantially the same thickness with the fiber direction substantially aligned with the longitudinal direction. Applying an adhesive only to the front and back surfaces of the first timber pillar-shaped first wood, the core material first layer forming step in which the adhesive is arranged in the width direction on the surface material, and the fiber direction substantially coincides with the longitudinal direction in thickness. Are arranged in the width direction with the longitudinal direction perpendicular to the longitudinal direction of the first wood on the first wood without applying an adhesive. In the core material second layer forming step, an adhesive is applied only to the front and back surfaces of the plurality of first woods, and the longitudinal direction is perpendicular to the longitudinal direction of the second woods on the second woods in the width direction. A core material third layer forming step to be arranged; a second surface material layer forming step of placing a flat plate-like second surface material on the core material third layer; Weight has been the first surface member, wherein the first timber, the second timber, and a clamping step of clamping the thickness direction said second surface material "comprising.

  “First surface material” and “second surface material” are a rotary veneer with wood cut like wigs, a slice veneer with wood cut by pulling, etc. Single-ply laminated materials laminated, plywood laminated with crossing fiber directions, special plywood with synthetic resin or paper cloth printed on the surface of the base plate with wood grain and patterns printed, etc. Can do. In addition, when using a wooden surface material, the kind of wood may be the same as that of the 1st wood or the 2nd wood, or may differ. The types of the first surface material and the second surface material may be the same or different.

  A plurality of core material second layer forming steps and core material third layer forming steps can be provided. For example, if both steps are added the same number of times, the core material second layer forming step and the core material second layer forming step are configured by the first wood layer and the second wood material. It is possible to manufacture a laminated wood having a structure in which a core material composed of an odd number of layers is sandwiched between a pair of surface materials.

  Therefore, according to the present invention, the core material and the surface material can be integrally formed by a very simple method. That is, conventionally, when a surface material layer is provided on a core material made of laminated material, a core material is preliminarily manufactured by adhering, laminating, and pressing a plate, and then both the outer sides in the thickness direction. There has been a manufacturing method in which an adhesive is applied to the side surface, a surface material is attached, and pressing is performed again. On the other hand, in the present invention, the process of applying the adhesive is only the core material first layer forming process and the core material third layer forming process, and the first surface material, the first wood, the second wood, and the first The pressing process is performed with all the two surface materials laminated. Thereby, the laminated wood in which the surface material is bonded to both outer sides of the core material in which deformation and shrinkage are suppressed can be manufactured by extremely simple integral molding.

  As described above, as an effect of the present invention, it is possible to provide a laminated wood that can reduce dimensional changes due to deformation and shrinkage and can be easily manufactured by reducing the number of steps, and a method for producing the laminated wood. Can do.

  Hereinafter, a laminated wood and a method for producing the laminated wood according to the best embodiment of the present invention will be described with reference to FIGS. Here, FIG. 1 is a perspective view of the laminated wood of the present embodiment, FIG. 2 is a process diagram showing a method of manufacturing the laminated wood of FIG. 1, and FIG. 3 is a perspective view of the laminated wood of another embodiment. 4 is a process diagram showing a method of manufacturing the laminated wood of FIG. 3, FIGS. 5 (a) and 5 (b) are sectional views for explaining the configuration of the laminated wood of another embodiment, and FIG. It is a perspective view of the laminated wood of embodiment. 1 to 6 do not accurately show the dimensional ratio of each component. Moreover, in FIG.1 and FIG.3, only the grain of the fiber direction of the 1st wood 1 and the 2nd wood 2 is shown in figure for simplification, and the illustration of the grain orthogonal to a fiber direction is abbreviate | omitted. Here, the wood grain shown merely indicates the fiber direction, and may be a square or a plate.

  The laminated wood 10 of this embodiment is mainly comprised by the 1st wood 1 and the 2nd wood 2 as shown in FIG. Here, the first wood 1 and the second wood 2 are each formed in a long prismatic shape in which the fiber directions are substantially aligned with the longitudinal direction. Moreover, the thickness of the some 1st timber 1 is substantially the same, and the thickness of the some 2nd timber 2 is also set substantially the same. The laminated wood 10 is laminated in the thickness direction with the first wood layer 11 in which the first wood 1 is arranged in the width direction without an adhesive layer interposed therebetween, and the second wood 2 Of the second wood layer 12 arranged in the width direction without an adhesive layer, the first wood layer 11 and the second wood layer 12. And an adhesive layer 3 provided therebetween.

  Moreover, in this embodiment, it is laminated | stacked on the opposite side to the 1st wood layer 11 in the thickness direction with the 2nd wood layer 12, and the 1st wood 1 makes a longitudinal direction orthogonal to the longitudinal direction of the 2nd wood 2 In addition, a first wood layer 13 arranged in the width direction without the adhesive layer 3 interposed therebetween is further provided, and the adhesive layer 3 is also provided between the first wood layer 13 and the second wood layer 12. ing. That is, the laminated wood 10 of the present embodiment has a wood three-layer structure in which the first wood layer 11, the second wood layer 12, and the first wood layer 13 are laminated in the thickness direction via the adhesive layer 3. It has become.

  More specifically, the first wood 1 and the second wood 2 are formed of coniferous wood such as cedar, cypress, and larch. In the present embodiment, the plurality of first woods 1 are all set to substantially the same size, and the plurality of second woods 2 are all set to substantially the same size. Furthermore, in the present embodiment, the thickness of the first wood 1 is set to be substantially the same as the thickness of the second wood 2.

  Next, the manufacturing method of the laminated wood 10 is demonstrated using FIG. First, a plurality of first wood 1 and second wood 2 having a predetermined thickness, width, and length are prepared. The first wood 1 and the second wood 2 are desirably dried to a moisture content of about 8 to 12%.

  First, on the horizontal work surface, the first woods 1 are arranged in the width direction without applying an adhesive (first wood arranging step S1). The first wood layer 11 is formed by the first wood 1, but at this stage, the individual first woods 1 are not yet fixed to each other.

  Next, an adhesive application device in which an adhesive is held by a pair of rollers rotating in opposite directions is used, the second wood 2 is passed between the pair of rollers, and the adhesive is applied only to the front and back surfaces ( Step S2a). And the 2nd wood 2 with which the adhesive agent was apply | coated to the front and back is arranged in the width direction on the 1st wood 1 already arranged (process S2b). At this time, by making the longitudinal directions of the first wood 1 and the second wood 2 orthogonal to each other, the state where the first wood 1 is arranged in the width direction is fixed by adhesion to the back surface of the second wood 2. While the 1st wood layer 11 is formed, the state where the 2nd wood 2 was arranged in the width direction by adhesion with the 1st wood 1 is fixed, and the 2nd wood layer 12 is formed. At the same time, the first wood layer 11 and the second wood layer 12 are bonded in the thickness direction via the adhesive layer 3. In addition, the process which combined the process 2a and the process 2b is equivalent to the 2nd wood adhesion arrangement | positioning process of this invention.

  Next, the first wood 1 is arranged in the width direction on the second wood layer 12 while the longitudinal direction is orthogonal to the longitudinal direction of the second wood 2 (first wood adhesion arranging step S3). Thereby, the state where the first woods 1 are arranged in the width direction is fixed by the adhesive applied to the surface (front surface) of the second wood 2, and the first wood layer 13 is formed. .

Thus, the 1st wood layer 11, the 2nd wood layer 12, and the 1st wood layer 13 will be in the state laminated | stacked on the thickness direction. In the present embodiment, since the first wood 1 and the second wood 2 are not further laminated (YES in step S4), the whole is subsequently pressed in the thickness direction (pressing step S5). In this embodiment, the cold pressing machine is pressed for about 40 minutes at a pressure of about 0.98 MPa (about 10 kgf / cm ² ). Note that a plurality of stacked layers that have undergone the process S1 to the process S3 can be prepared and used together for the pressing process S5. Moreover, the curing process which stabilizes an adhesion state can also be suitably provided after pressing process S5.

  Through the above steps, the laminated wood 10 having the wood three-layer structure of the first wood layer 11, the second wood layer 12, and the first wood layer 13 is manufactured. The laminated wood 10 manufactured in this way can be used as a core material for doors, walls, etc. with the large cross-sectional area in the manufactured state. Or it can cut | disconnect to a suitable dimension and can use it as structural materials, such as a roofing material of a door, a floor edge, and a girder, and a beam. Moreover, an adhesive can be apply | coated to at least one surface of the outermost side of the thickness direction of the laminated wood 10, and it can also be used by sticking the cosmetic surface material.

  As described above, according to the laminated wood 10 and the manufacturing method thereof of the present embodiment, the first prism 1 and the second wood 2 having a long prismatic shape are laminated with their longitudinal directions orthogonal to each other. In each of the wood layer 11 and the second wood layer 12, even if the first woods 1 and the second woods 2 are not bonded in the width direction, the first wood layer 11 and the second wood layer 12 are between them. The arranged state in the width direction can be fixed simultaneously with the adhesion in the thickness direction by the adhesive layer 3 provided. As a result, each wood layer laminated in the thickness direction is pre-assembled by adhering a saw plate or the like in the width direction, and if necessary, pressure treatment and glazing to make the layer thickness uniform. Compared to conventional laminated wood produced by bonding each layer in the thickness direction and finally pressing them, the labor, time and cost are reduced with a very simple manufacturing method. Can be manufactured.

  In addition, since the first woods 1 and the second woods 2 are not bonded to each other in the width direction, even if the individual first woods 1 and the second woods 2 are deformed or contracted, the adjacent woods are affected. In addition, the deformation and shrinkage of the laminated wood 10 as a whole can be reduced.

  Furthermore, by laminating so that the fiber direction of the first wood 1 and the fiber direction of the second wood 2 are orthogonal to each other, one of the first wood 1 and the second wood 2 is forced to dry shrink in the fiber direction. It is suppressed by the other wood whose fiber direction is difficult to contract in the direction in which the force acts, and the contraction of the laminated wood 10 as a whole can be suppressed.

  In particular, in the present embodiment, since the thickness of the first wood 1 and the thickness of the second wood 2 are set to be substantially the same, at the interface between the first wood 1 and the second wood 2, one is orthogonal to the fiber direction. The force which the other resists against the force to shrink in the direction, and the shrinkage of the laminated wood 10 as a whole is effectively suppressed.

  Moreover, since the laminated wood 10 has a layer in which the fiber directions coincide with each other in two directions orthogonal to each other, it can exert a strong compressive strength in any direction and has a degree of freedom in the direction of use. High and versatile.

  Furthermore, Japan aims to secure 3.9% of the 6% commitment to reduce carbon dioxide emissions under the Kyoto Protocol through forest carbon dioxide absorption and storage functions. Management is an urgent issue. Therefore, in the future, it is expected that more and more active use of domestic timber produced by thinning and logging of domestic forests will be required. Therefore, the laminated wood 10 of the present embodiment and the manufacturing method thereof are extremely significant in that thinned wood and the like such as cedar, cypress, and larch that occupy a large proportion of the domestic forest area can be effectively used.

  In addition, although the case where the laminated wood 10 has a wood three-layer structure is illustrated above, the present invention is not limited to this. For example, after passing through the first wood arranging step S1, the second wood adhering arranging step S2a, S2b, and the first wood adhering arranging step S3, it is further laminated in the thickness direction (NO in step S4), By returning to S2a and adding the second wood bonding and arranging steps S2a and S2b and the first wood bonding and arranging step S3 the same number of times, it is possible to manufacture laminated wood composed of odd layers such as five layers and seven layers. . For example, the first wood bonding step S1, the second wood bonding row step S2a, S2b, the first wood bonding row step S3, the second wood bonding row step S2a, S2b, the first wood bonding row step S3, By producing in the order of the pressing step S5, as shown in FIG. 5A, the first wood layer 21, the second wood layer 22, the first wood layer 23, the second wood layer 24, and the first wood A laminated wood 20 having a wood five-layer structure composed of the layers 25 can be produced.

  Next, the laminated wood 30 in which the surface material layer is further provided on both outer sides in the thickness direction, and the manufacturing method thereof will be described. As shown in FIG. 3, the laminated wood 30 of the present embodiment has a wood three-layer structure core 39 having the same configuration as the laminated wood 10, and the adhesive layer 3 on both outermost sides in the thickness direction. And a pair of plate-like surface materials 51 and 52 stacked therebetween.

  In the present embodiment, a case where the laminated wood 30 is applied as a door material is illustrated. Here, the first wood 1 and the second wood 2 are both in the shape of an elongated prism with the fiber direction substantially coincided with the longitudinal direction in the same manner as described above. Can be set. For example, since the thickness of the door is usually 30 to 40 mm, the thickness of the first wood 1 and the second wood 2 can be set to 7 to 12 mm, and the thickness of the surface material can be set to 2 to 5 mm. Of course, it is not limited to such dimensions, and can be set appropriately according to the use of the laminated wood 30 and the like.

  The manufacturing method of the laminated wood 30 is demonstrated using FIG. First, the flat surface material 51 is installed on the horizontal work surface (first surface material installation step T11). Next, using the roller-type adhesive application device, the adhesive is applied only to the front and back surfaces of the first wood 1 (step T12a), and the first wood 1 is placed on the surface material 51 in the width direction. (Step T12b). As described above, the state in which the first timbers 1 are arranged in the width direction is fixed by adhesion to the surface material 51 to form the core material first layer 31, and at the same time, the first surface material layer 36 formed by the surface material 51. And the core first layer 31 are bonded together. In addition, the process of combining the process 12a and the process 12b corresponds to the core material first layer forming process of the present invention.

  Next, on the first core material layer 31, the second timber 2 is arranged in the width direction with the longitudinal direction orthogonal to the longitudinal direction of the first timber 1. Thereby, the state where the second wood 2 is arranged in the width direction is fixed by the adhesive applied to the front surface of the first wood 1 of the core material first layer 31, and the core material second layer 32 is formed (core material second layer forming step T13).

  Furthermore, an adhesive is applied only to the front and back surfaces of the first wood 1 (process T14a), and the longitudinal direction is arranged in the width direction on the core material second layer 32 so that the longitudinal direction is orthogonal to the longitudinal direction of the second wood 2. (Step T14b). As a result, the state in which the first woods 1 are arranged in the width direction is fixed by adhesion to the second wood 2, and the core material third layer 33 is formed. At the same time, the core material second layer 32 and the core material first The three layers 33 are bonded in the thickness direction. In addition, the process of combining the process 14a and the process 14b corresponds to the core material third layer forming process of the present invention.

  As described above, the core material first layer 31, the core material second layer 32, and the core material third layer 33 constituting the core material 39 are stacked on the surface material 51. Since the present embodiment does not further laminate the first wood 1 and the second wood 2 (YES in step T15), another surface material 52 is subsequently placed on the core material third layer 33. Put. Thereby, the surface material 52 is adhere | attached with the adhesive agent apply | coated to the front surface of the 1st wood 1, and the 2nd surface material layer 37 is formed (2nd surface material layer formation process T16).

  And in the state where the first surface material layer 36, the core material first layer 31, the core material second layer 32, the core material third layer 33, and the second surface material layer 37 are laminated in the thickness direction, Clamp in the thickness direction (clamping step T17). In this way, the first surface material layer 36, the core material first layer 31, the core material second layer 32, the core material third layer 33, and the second surface material layer 37 have a thickness through the adhesive layer 3. In each of the core material first layer 31, the core material second layer 32, and the core material third layer 3 that are bonded and laminated in the direction and constitute the core material 39, the first wood 1 or the second wood 2 is arranged in the width direction. Laminated wood 30 that is not bonded is produced.

  As described above, according to the laminated wood 30 and the manufacturing method thereof of the present embodiment, the core material 39 and the surface materials 51 and 52 are integrally formed by a very simple method, and deformation and shrinkage are suppressed as a whole. Laminated wood 30 can be manufactured.

  In the above, the case where the core material 39 has a three-layer structure of the wood is exemplified, but the present invention is not limited to this, and the first surface material forming step T11, the core material first layer forming steps T12a and 12b, the core material. After passing through the second layer forming step T13 and the core material third layer forming steps T14a and T14b, the layers are further laminated in the thickness direction (NO in step T15), and the core material second layer forming step T13 and the core material third By adding the layer forming steps T14a and T14b the same number of times, a laminated wood having a core material composed of an odd number of layers such as five layers and seven layers can be manufactured. For example, first surface material installation step T11, core material first layer formation step T12a, 12b, core material second layer formation step T13, core material third layer formation step T14a, T14b, core material second layer formation step T13, By configuring the manufacturing process in the order of the core material third layer forming step T14a, T14b, the second surface material forming step T16, and the pressing step T17, as shown in FIG. A core material 49 having a five-layered wood structure composed of a core material second layer 42, a core material third layer 43, a core material second layer 44, and a core material third layer 45 is a first surface material 51 (first The laminated wood 40 having a configuration sandwiched between the one surface material layer 36) and the second surface material 52 (second surface material layer 37) can be manufactured.

  In the laminated woods 30 and 40 having the above-described configuration, the core material first layer 31, the core material third layer 33, the core material first layer 41, the core material third layer 43, and the core material third layer 45. Corresponds to the first wood layer of the present invention, and the core material second layer 32, the core material second layer 42 and the core material second layer 44 correspond to the second wood layer of the present invention.

  The present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to the above-described embodiments, and various improvements can be made without departing from the scope of the present invention as described below. And design changes are possible.

  For example, for the laminated timbers 10 and 30, the positions of the boundaries in the width direction of the first timber 1 in the first timber layers 11 and 13 and the first timber layers 31 and 33, respectively, are used as shown in FIGS. Although the case where it aligned in the width direction was illustrated, it is not limited to this. For example, as illustrated in FIG. 6, the position of the boundary in the width direction of the first wood 1 in the first wood layer 11 and the position of the boundary in the width direction of the first wood 1 in the first wood layer 13 are They can also be arranged in a line shifted in the direction. Thereby, it can be set as the laminated wood 50 with higher rigidity with respect to the bending stress which acts in the thickness direction.

It is a perspective view of the laminated wood of this embodiment. It is process drawing which shows the manufacturing method of the laminated wood of FIG. It is a perspective view of the laminated wood of other embodiment. It is process drawing which shows the manufacturing method of the laminated wood of FIG. It is sectional drawing explaining the structure of the laminated wood of other embodiment. It is a perspective view of the laminated wood of other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st wood 2 2nd wood 3 Adhesive layer 10,30 Laminated wood 11,13 1st wood layer 12 2nd wood layer 51 Surface material (1st surface material)
52 Surface material (second surface material)
S1 First Wood Arrangement Steps S2a, S2b Second Wood Adhesion Arrangement Step S3 First Wood Adhesion Arrangement Steps S5, T17 Clamping Step T11 First Surface Material Installation Steps T12a, T12b Core Material First Layer Formation Step T13 Core Material second layer forming step T14a, T14b Core material third layer forming step T16 Second surface material layer forming step

Claims (3)

A first wood layer in which a plurality of elongated prismatic first woods having substantially the same thickness and substantially the same fiber direction as the longitudinal direction are arranged without an adhesive layer in the width direction,
A plurality of long prismatic second timbers laminated in the thickness direction with the first timber layer and having substantially the same fiber direction in the longitudinal direction, the longitudinal direction of which is the longitudinal direction of the first timber. A second wood layer arranged orthogonal to the direction and without an adhesive layer in the width direction;
A laminated wood comprising an adhesive layer provided between the second wood layer and the first wood layer. A first wood arranging step of arranging a plurality of elongated prismatic first woods having substantially the same thickness in the longitudinal direction and substantially the same in the width direction without applying an adhesive,
An adhesive is applied only to the front and back surfaces of a plurality of long prismatic second timbers having substantially the same thickness in the fiber direction and substantially the same thickness, and the longitudinal direction is set on the first timber. A second wood bonding row arranging step of arranging in the width direction orthogonal to the longitudinal direction of,
A first wood adhesion arranging step of arranging a plurality of the first woods in the width direction with the longitudinal direction orthogonal to the longitudinal direction of the second wood on the second wood without applying an adhesive; ,
A method for producing laminated wood, comprising: a pressing step of pressing the stacked first and second woods in a thickness direction. A first surface material installation step of installing a flat first surface material;
A core material in which an adhesive is applied only to the front and back surfaces of a plurality of long prismatic first timbers having substantially the same thickness with the fiber direction substantially aligned with the longitudinal direction, and arranged in the width direction on the surface material A first layer forming step;
A plurality of elongated prismatic second timbers having substantially the same thickness with the fiber direction substantially coincided with the longitudinal direction, the longitudinal direction of the first timber without being coated with an adhesive. A core material second layer forming step arranged in a width direction orthogonal to the direction;
A core third layer is formed by applying an adhesive only to the front and back surfaces of the plurality of first woods, and arranging the longitudinal direction on the second woods so that the longitudinal direction is perpendicular to the longitudinal direction of the second woods in the width direction. Process,
A second surface material layer forming step of placing a flat plate-like second surface material on the third core material layer;
A laminated wood manufacturing method comprising: a stacked pressing step of pressing the stacked first surface material, the first wood, the second wood, and the second surface material in a thickness direction. Method.

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