JP2014162198A - Method for consolidating and molding needle-leaved tree and furniture manufactured by this method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new technology of consolidation and molding which enables efficient consolidation processing of a soft needle-leaved tree such as Japanese cedar and cypress and economical mass production of wooden products such as high-quality furniture and fixtures with curved surfaces used in a large amount by utilizing consolidation processed members of soft needle-leaved trees obtained by this consolidation processing.SOLUTION: This method for consolidation and molding of soft needle-leaved trees comprises heating and pressurizing a needle-leaved tree veneer 11 (needle-leaved tree veneer sheet 12) obtained by deforestation A, lumbering B, and cutting C in the consolidation step to produce a needle-leaved tree consolidated veneer sheet 13, polishing processing and/or in-siding processing in the polishing step E to produce a needle-leaved tree consolidated polished veneer sheet 16, and then cutting out a plurality of needle-leaved tree consolidated profile plates 20 in the cutting step G, lamination, bonding, heating, pressurization, and molding to make a curved shape of a prescribed curvature in a lamination direction with an adhesive P interposed between the plurality of needle-leaved tree consolidated profile plates 20, 20... of at least a kind of prescribed shape in the lamination, bonding, molding step H to obtain a needle-leaved tree consolidated plywood molded product 3.

Description

    This invention relates to the manufacture of woodworking products using coniferous wood, and in particular, manufactures and provides woodworking products that can achieve substantially the same strength as hardwood by consolidating softwood. In addition to the fields to be provided, materials and machinery, parts and materials necessary for transportation, storage, assembly and installation, and materials necessary for such materials, machinery and parts, such as wood, stone, etc. , The field of providing various fibers, plastics, various metal materials, etc., the field of electronic components incorporated in them, the field of control-related equipment that integrates them, the field of various measuring instruments, the field of power machines that move the equipment and instruments, We have tested and researched fields generally called industrial machinery, such as the electric power and energy sources that make up that energy, and the field of oil, as well as those facilities and equipment. , Fields related to display, sales, import / export of these, generals, fields related to the collection and transportation of garbage debris generated as a result of their use, equipment for making them, and operation of equipment, etc. There is no technical field that is not related to the new field that cannot be envisaged at present, such as the recycling field that efficiently recycles garbage.

(Points of interest)
Since its history, hardwood has been used extensively in various woodworking products until recently because of its excellent basic performance required for furniture and joinery materials, such as surface hardness, durability, and wear resistance. However, due to the construction rush and the expansion of consumption accompanying the economic development and improvement of living standards in many countries, Southeast Asian rainforests have been mass-cutted. Southeast Asian countries, which have been accelerating and come here with a sense of crisis, have started to actively engage in conservation activities for southern seawood such as Lauan, and gradually securing the stability of hardwood in Japan is becoming difficult. In order to meet the demands of the domestic market in response to changes in the international situation, the development of new technologies that increase the strength of abundant coniferous wood in Japan and make effective use of it is being promoted in various fields.

(Conventional technology)
For example, as represented by those proposed in the following Patent Document 1 (1) and Patent Document 1 (2), the surface is compressed and heated in a direction perpendicular to the grain length direction of the softwood material. The plastic working material is compressed and heated in a direction perpendicular to the length direction of the grain of coniferous wood so that the length direction of the uncompressed softwood veneer is perpendicular to the surface plastic working material, A plurality of softwood veneers are laminated and bonded so that the length directions of each grain are orthogonal to each other, and the length direction of the joint side veneer to be joined to the surface plastic working material is determined by the grain direction of the surface plastic working material. The inner layer plywood bonded to one side of the surface plastic working material is provided so as to be orthogonal to the length direction, and the structure of the components constituting the cell wall of the surface plastic working material becomes dense, and hardness, wear resistance, etc. It is possible to provide a laminated material that is highly resistant to scratches and dents. Saw the pine tree as seen in Reference 1 (3), fully hydrated this timber tree, irradiate microwaves to forcibly drain the water in the temporary conduit and soften the cellulosic tissue, A method for producing high-strength wood that compresses wood at a predetermined pressure during the presence of latent heat and makes it possible to increase strength, hardness, and tensile force as compared with raw wood, as in Patent Document 1 (4) After drying the cedar wood, it is repeatedly pressed and pressed by hot pressing and hardened by increasing the density of the surface layer of the wood. A method for producing compressed wood that releases gas such as water vapor and prevents cracks in the wood, and the fiber directions shown in Patent Document 1 (5) are orthogonal to each other. Single plate is laminated to form a composite plate. The wood fiber board by leaf tree material laminated as a surface plate, a composite plate formed by manufactured integrally hot press, etc. available and the laminate is scattered to softwood that can not be used alone as a surface plate.

    As for the consolidation technique of softwood materials as shown in the former patent document 1 (1) thru | or the patent document 1 (5), the surface hardens | cures by heat compression processing, and it becomes difficult to have a damage | wound and a dent, and is enough. Although it is possible to obtain the advantage of ensuring sufficient strength and rigidity, the flat plywood can be appropriately sized and used even when used for furniture and joinery materials, etc. It must be manufactured by cutting into shapes and combining them, and when manufacturing furniture and fittings with curved surfaces, it is necessary to cut and polish the curved surfaces. Due to the process, mill ends and cutting scraps are generated, yield is poor, and the scraps need to be recycled, which is uneconomical and leaves a fatal defect that is not rational.

    Also, each research institution has started research from various angles regarding techniques such as consolidation processing and insizing processing on coniferous wood. For example, Non-Patent Document 1 (1) or Non-Patent Document 1 described below. As shown in (3), tests to reduce the number of man-hours for producing cedar compacted materials and to study more efficient processing methods, tests for practical application of cedar compacted materials as surface decorative materials, and In addition to the surface finishing material made of cedar compacted material using natural paint, an experiment to produce a higher-grade prototype is being tried, as in Non-Patent Document 1 (4). In addition to evaluating the surface properties of cedar compacted wood produced by the steam treatment method, the friction coefficient is measured, and the effect of the compression ratio on the surface roughness and whether the consolidation treatment can be replaced by a paint polishing process. Evaluation of material color change by steam treatment The improvement of surface gloss by compaction processing, the reduction of the friction coefficient after consolidation treatment, and the change of the friction coefficient after cutting, etc. have been tested and examined for practical use. As seen in Patent Document 1 (5), we tested the effects on the surface performance of cedar surface consolidated wood due to differences in consolidation methods such as open heat treatment, closed heat treatment and resin treatment associated with roll press. As shown in Non-Patent Document 1 (6), a hard veneer is produced by impregnation after resin impregnation to produce a hard veneer, resin impregnation conditions and consolidation conditions, and baseboard plywood Tests on the performance of composite plywood bonded to the surface, and confirmed improvement in mechanical performance compared to untreated plywood, etc., by consolidating softwood in each direction, furniture and fittings, etc. New to be used as the main part of In addition, when softwood is used as an antiseptic base, as shown in Non-Patent Document 1 (7) and Non-Patent Document 1 (8), the surface of the wood is imbedded. It has been reported that the sizing process has been performed to increase the permeability of the preservative, and that the wood strength and the infiltration property have been evaluated by such insizing process density.

However, the condensate technique of coniferous wood shown in Non-Patent Document 1 (1) to Non-Patent Document 1 (8) is combined with the technique of Patent Document 1 (1) to Patent Document 1 (5). Even when manufacturing furniture with a curved surface design, curved surface cutting techniques such as cutting, cutting, and polishing are essential, increasing the number of man-hours, deteriorating production efficiency, and increasing the price. In addition, in particular, plywood parts that have been cut and cut to cross the laminate and finished to a curved shape still have a fatal problem that the bending strength is significantly reduced.
(1) JP 2012-111129 (2) JP 2012-111128 (3) JP 11-348002 (4) JP 9-267309 (5) JP 8-207909 (1) Production of Junji Yamada, Masahiro Sumitomo, Takeshige Sakamaki, and cedar compacted material. Research report of Tokushima Prefectural Industrial Technology Center. Vol. 11 (2002) (2) Trial production of wood products using Junji Yamada, Masahiro Sumitomo, Takeshige Sakamaki, and cedar veneer compacted material. Research report of Tokushima Prefectural Industrial Technology Center. Vol. 12 (2003) (3) Junji Yamada, Hiroyuki Nakase, Masanori Nakaoka, Masahiro Sumitomo, Kyoko Shimuro, Shinya Yasunaga, Development of highly functional processing technology for furniture and fittings. Research report of Tokushima Prefectural Industrial Technology Center. Vol. 15 (2006) (4) Naoyuki Tsuji, Kozo Kanayama, Shingo Nakayama, Hisao Kishi, Satoshi Kimura, Evaluation of surface properties of consolidated wood. Mie Prefectural Institute of Advanced Industrial Science and Technology Research Report (23), 36-42, 1998 (5) Masafumi Inoue (Asia Bioresource Environment Research Center, The University of Tokyo), Junichi Kodama (Yamamoto Builder Co., Ltd.), Sugi surface using roll press Production of consolidated wood. Gifu Life Technology Research Institute. 2004. Leaflet (6) Noriyoshi Takaya, making a plywood with excellent performance by hardening a single plate (Part 2) About the performance of composite plywood. Forestry Experiment Station, Forest Research Headquarters, Hokkaido Research Institute. News from the Forest Products January 2000 (7) Akio Nunomura, Mitsuo Saito, Akira Kasai, Effects of Insizing on Softwood from Hokkaido (Part 1). Forestry Experiment Station, Forest Research Headquarters, Hokkaido Research Institute. Forestry trial monthly report No. 371.1992 December (8) Akio Nunomura, Mitsuo Saito, Effects of Insizing on Softwood from Hokkaido (Part 2). Forestry Experiment Station, Forest Research Headquarters, Hokkaido Research Institute. Forestry trial monthly report No. 378. July 1983

(Awareness of problems)
As described above, the softwood processing material, the consolidation processing method, and the like that have been proposed so far are all related to the production of flat materials, and to produce furniture and fittings that use a lot of curved surfaces, Manufactures plywood by laminating compacted materials into flat plates and pillars, and joins two or more plywood ends cut into desired shapes through appropriate joints and joint structures, and further cuts them to create curved surfaces There is no choice but to apply a curved cut to the joints and joints, not only the bonding strength will decrease, but the joints and joints may be exposed on the curved parts and the appearance may be damaged. A large amount of scraps and polishing scraps are generated, which necessitates recycling and disposal of the scraps, and increases the number of manufacturing steps such as polishing finishes, resulting in high production costs. It is almost impossible to produce Using conifers, especially softwood softwood such as cedar and cypress, it achieves sufficient strength while having a curved surface shape, and produces waste ends during production. It is possible to reduce production man-hours and produce efficiently, and to obtain quality and aesthetics that are not inferior to high-quality furniture and fittings using conventional hardwood materials, at a lower price. We came to realize the necessity of developing new technology that enables mass production of excellent quality woodwork products.

(Object of invention)
Therefore, the present invention makes it possible to efficiently compact soft coniferous materials such as cedar and cypress, and use high-quality furniture and joinery that use many curved surfaces using the soft coniferous compacted material obtained thereby. Judging whether it is possible to develop a new compaction and molding technology that enables mass production of woodworking products economically, we started development and research very quickly, and trial and error over many years and many trial productions As a result of repeating the experiment, this time, we finally succeeded in realizing a new softwood consolidation and molding method, and a furniture made by incorporating furniture components with a new structure manufactured thereby. In the following, the configuration will be described in detail together with an embodiment representative of the present invention shown in the drawings.

(Structure of the invention)
As clearly understood from the embodiments representing the present invention shown in the drawings, the method for consolidating and forming the softwood material of the present invention basically comprises the following configuration.
That is, a coniferous veneer and / or a softwood veneer that has been cut into a predetermined thickness, a predetermined width or more, and a predetermined length or more in a cutting process is processed by a hot pressing roll in a consolidation process. Using a press, heating and pressurizing to form a softwood consolidated veneer with a compression rate of 30-70%, and then polishing and / or insizing the softwood consolidated veneer in the polishing process, After cutting, cut into at least one kind of desired shape in the cutting process, cut out a plurality of softwood consolidated contour plates, and at least one kind of predetermined shape, softwood consolidated contour plates in the lamination / adhesion / molding process A configuration in which a coniferous compacted plywood molded body having a desired shape and size is obtained by laminating, bonding, heating, pressing, and molding so as to obtain a curved shape with a desired curvature in the laminating direction via an adhesive between them. Summary and That is a softwood compaction and molding method.

    More specifically, the method for consolidating and forming the coniferous material comprising this basic structure is produced by sawing the cut coniferous material in the sawing process, and in the cutting process with a predetermined thickness, a predetermined width or more, and a predetermined value. Conifer veneer veneer and / or softwood veneer sliced longer than the length are heated and pressed using a hot-press roll press in the consolidation process, and the conifer veneer veneer for surface material with a compression rate of 30 to 70%, and compression After obtaining the softwood consolidated veneer for core material having a rate of 30 to 70% and a compression rate lower than that of the softwood consolidated veneer for surface material, in the polishing step, the various softwood consolidated veneers were polished and processed / Insizing processed into a softwood consolidated polishing veneer for a surface material and a softwood consolidated polishing veneer for a core material, and in the bonding process, two softwood consolidated polishing veneers for a surface material via an adhesive With one piece of coniferous consolidation for core material Laminate, bond, and press the board into a sandwich shape to make a coniferous consolidated plywood, cut into at least one desired shape in the cutting process, cut out a plurality of softwood consolidated contour plywood, and at least in the laminating, bonding, and forming process A desired shape and dimensions by laminating, bonding, heating, pressurizing, and molding to form a curved shape with a desired curvature in the laminating direction via an adhesive between a plurality of softwood consolidated contour plywood. This method is a method for consolidating and forming a softwood material having a structure in which a softwood compacted plywood molded body is obtained.

(Related invention)
In relation to the above-described method for consolidating and forming softwood, the present invention includes furniture manufactured by the method for consolidating and forming softwood.
That is, the basics of the present invention, in which a furniture part made of a softwood consolidated plywood molded body manufactured by the method for consolidating and forming a softwood material having this basic structure is incorporated as a strength part at an appropriate location to be exposed. The furniture manufactured by the coniferous material consolidation and forming method.

    As described above, according to the coniferous material consolidation and molding method of the present invention, unlike the conventional one, from the unique characteristic configuration as described above, to the coniferous compacted veneer after the consolidation step, the polishing step In order to obtain a softwood compacted single veneer by polishing and / or sizing with a bending Young's modulus compared to when cutting, laminating, adhering and forming after the consolidation process In addition to increasing the permeability of the adhesive into the wood fiber structure, it prevents problems such as peeling and cracking caused by swelling of the laminated, bonded and molded processes and the finished softwood compacted plywood molded body. In addition, the aesthetics and the durability strength are remarkably improved, and an excellent characteristic that a high-quality softwood compacted plywood molded body can be mass-produced more efficiently is obtained.

    Moreover, if the method for consolidating and molding the coniferous material of the present invention is applied to thinned wood of coniferous trees that are generated in large quantities in the process of forest management, fallen coniferous wood, etc., the cost of carrying out from the mountains up to now has increased, It has been considered that it is difficult to make effective use economically because profits commensurate with the burden cannot be obtained, but in this way it is difficult to add value to softwood materials for luxury furniture and furniture. It gives the external appearance and durability strength that can be used for parts, etc., and exhibits the excellent effect that it can be used rationally without waste.

    In addition, a plurality of softwood compacted contour plates obtained through the compaction process, polishing process and cutting process are laminated, bonded, and molded by a desired curvature in the stacking direction via an adhesive between the softwood compacted contour plates. In order to obtain a curved shape of the above, laminated, bonded, heated, pressurized, and molded to obtain a coniferous compacted plywood molded body of the desired shape and dimensions, so multiple coniferous compacted contour plates are laminated with adhesive In addition, it can be formed into a desired curved shape at the same time as it is firmly integrated, and the manufacturing man-hour can be greatly reduced, and cutting and polishing processes are almost unnecessary, and cutting waste and polishing waste are substantially generated. Therefore, the productivity of high-precision and high-quality woodwork can be greatly increased.

    Furthermore, by obtaining the softwood compacted veneer for the surface material in the cutting process and the compacting process, and the softwood consolidated veneer for the core material having a lower compressibility than that, in the bonding process following the polishing process, In the case where a softwood compacted plywood is obtained by laminating, adhering and pressurizing one core coniferous consolidated veneer veneer in a sandwich with two surface softwood consolidated veneers via an adhesive In the cutting process, a plurality of softwood consolidated contour plywood are laminated, bonded, heated, pressed, and molded by the lamination, adhesion, and molding process. Compared with the case of laminating, bonding, heating, pressing, and molding coniferous consolidated contour plates, the wood used is the amount of core coniferous consolidated polishing veneer that is thicker than the softwood consolidated polishing veneer for the surface material The amount can be controlled and the bending strength The without decreasing not that much, and that further an effect that can be produced economically.

    Coniferous veneer and / or conifers sliced into a thickness of 1.0 to 5.0 mm for a molded plywood core material, a thickness of 0.5 to 2.0 mm for a surface material, a predetermined width and a predetermined length in a cutting process In the case of obtaining a veneer, in the subsequent consolidation step and polishing step, after obtaining the softwood consolidation polishing veneer for the surface material and the softwood consolidation polishing veneer for the core material, bonding is performed by the bonding step. 2 sheets of coniferous compaction polishing veneer for surface material through an agent, one sheet of coniferous compaction polishing veneer for core material is laminated, bonded and pressed to form a coniferous consolidation plywood. By cutting out the softwood contoured plywood and laminating, bonding, and molding, the bending strength of the softwood compacted plywood molded body made from coniferous wood can be made much closer to that of conventional hardwood plywood. To raise It is, has the advantage that more can be economically mass-produced obtained.

    In the consolidation step, using a hot-press roll press, heating and pressurizing (room temperature to 300 ° C., pressurizing at roll intervals) for a molded plywood core material and / or a surface material with a compression rate of 30 to 70% In the case of softwood consolidated veneer, beautiful wood grain is maintained without causing cracks, wrinkles, breakage, significant discoloration, etc. on the softwood veneer and / or softwood veneer sliced in the cutting process. There is an effect that high strength can be achieved, and in the polishing process, the softwood consolidated veneer is polished and / or insized using polishing paper having a roughness of P100 to 240 Thus, it is possible to further improve the bending Young's modulus and suppress swelling and obtain a softwood consolidated plywood molded body with high quality, high accuracy and high strength.

    In the bonding process and / or in the lamination / bonding / molding process, when the pressing time is 10 minutes or more and the molding temperature is heated to 10 ° C. or more from room temperature, the pressure is reduced until the molding temperature decreases by 10 ° C. or more. Maintaining the clamped state, or when the molding temperature is heated to room temperature or higher, it is restricted to one of maintaining the pressed state until the molding temperature drops to room temperature. Swelling of the wall thickness due to internal pressure can be greatly suppressed, and a remarkably stable quality can be obtained. Furthermore, by performing heating by low voltage heating or high frequency heating, the occurrence of swelling can be further suppressed.

    Then, each average bending Young's modulus of the softwood compacted plywood molded body is obtained, and the average bending Young's modulus of the hardwood plywood manufactured in the same shape as that is obtained in advance, and a constant allowable static load is applied to the hardwood plywood having a predetermined thickness. Is measured, and based on the average bending Young's modulus, when a constant allowable static load is applied to the softwood compacted plywood molded body, the required thickness dimension is the same as the hardwood plywood. After the calculation, the final finished thickness dimension of the softwood compacted plywood molded body was regulated and manufactured so as to substantially match the required thickness dimension, so that, as in the softwood consolidated plywood molded body according to the present invention, at the initial stage of development. For some materials, it is usually difficult to stabilize the quality unless a large number of prototypes are manufactured and the strength is examined, and it takes a lot of time and labor to stabilize the quality of mass-produced products. However, the number of such prototypes can be greatly reduced, and it is possible to efficiently produce conifer-consolidated plywood moldings that have excellent durability from the beginning and that keep the wall thickness to the minimum necessary. In addition, a great effect is achieved in that the period can be greatly reduced and shortened.

    Furthermore, the fire resistance required for furniture and fittings is improved by painting the softwood consolidated plywood molded body with flame retardant and transparent paint in the painting process added after the lamination, adhesion and molding process. At the same time, the gloss can be increased to improve the external aesthetics, and the antifouling property, moisture proofing property, antiseptic property, antifungal property and insect repellent property can be further enhanced.

    The furniture manufactured by the coniferous material consolidation / molding method of the present invention has a strength in an appropriate position where the furniture part made of the softwood consolidated plywood formed by the coniferous material consolidation / molding method of the present invention is exposed. Compared to plywood furniture that uses softwood veneer and / or softwood veneer as it is, it changes into a deep dark color depending on the compression ratio of consolidation processing The aesthetics and surface hardness are greatly improved by the increased grain, and the bending Young's modulus can be dramatically increased, making it possible to achieve the same durable strength as furniture using hardwood materials. Forests such as coniferous thinned wood and coniferous fallen wood that have been considered difficult to use effectively by using coniferous thinned wood and coniferous fallen wood that occur in large quantities in the forest management process Resources are those Xiu features is obtained that gives a high added value as fine furniture material.

In implementing the present invention having the above-described configuration, the best or desirable mode will be described.
The lumbering process is a process that cuts the bark of the felled coniferous material from the felled coniferous material as appropriate in order to obtain a lumber with a shape and dimensions suitable for the next cutting process, followed by the slicer and rotary race. It must be cut into a shape and dimensions compatible with the cutting process, etc., and it is produced after the cutting process, at least the softwood compacted veneer (coniferous veneer and / or softwood veneer) processed in the cutting process Should be cut to a size and shape suitable for a softwood compacted contour plate, as shown in the examples described later, when using a slicer in the next cutting step, a circular saw or When using a saw saw machine with a band saw and using a rotary race in the next cutting step, the bark is removed as a log.

    Coniferous wood has complex and dense cells like hardwood, and it can be used as furniture or joinery material with many curved surfaces just by cutting it as it is. Most of them consist of temporary canals, and expressed in different ways: natural conifers and their fallen trees, conifers cut from managed forests, and coniferous thinning and fallen timber generated in the process of forest management More specifically, for example, cedar, cypress, yew, kaya, kouyamaki, benimatsu, sawara, tsutsuga, Japanese cedar, yakusugi, hiba, hinoki, larch, spruce, red pine, black pine, todomatsu, It can be said that they are Japanese Komatsu, Ginkgo, Hari fir, Togasawara, Fir, Ibuki, and Rat.

The cutting process is a process of processing a softwood veneer and / or a softwood veneer with a predetermined thickness, a predetermined width or more, and a predetermined length or more from the lumber that has been cut into an appropriate shape in the previous process, using a slicer, rotary lace, etc. In order to be able to cut out the coniferous consolidated contour plywood of the desired shape in the cutting process to be performed later, it must be sliced more than the width dimension and the length dimension of the coniferous consolidated contour plywood. It should be processed to a thickness that can be effectively consolidated in the consolidation step, and as shown in the examples described later, a thickness of 1.0 to 5.0 mm for a molded plywood core material It is desirable to obtain a softwood veneer and / or a softwood veneer sliced into a thickness of 0.5 to 2.0 mm, a predetermined width and a predetermined length for the surface material, and a thickness of 0.5 mm for the surface material. Not yet If it is set to, it will be difficult to stably ensure sufficient strength and appearance quality as a surface material. If the thickness exceeds 2.0 mm, the curing range by the subsequent compaction process will remain on the surface, and the thickness center Is hardened and is not likely to have sufficient strength as a surface material, and when the thickness is set to less than 1.0 for a molded plywood core material, there is a dimensional difference between the core material and the surface material. There is a reason that it is almost lost and economically disadvantageous, and if the thickness exceeds 5.0 mm, sufficient strength as a core material cannot be obtained.
However, the softwood veneer and / or the softwood veneer does not completely eliminate the function of increasing the durability strength even when the thickness dimension range is slightly deviated, and these thickness dimension ranges are the recommended values. The thickness dimensions of the softwood veneer and / or softwood veneer can be set as appropriate according to the intended use and required strength of the compacted plywood molded body and furniture parts, furniture, joinery, etc. it can.

    The consolidation step is a step of increasing strength by heating and pressurizing the softwood veneer and / or softwood veneer processed to a predetermined thickness, a predetermined width or more, and a predetermined length or more in the cutting step of the previous step, and increasing the strength. It must be heated and pressed using a hot-press roll press to obtain a softwood compacted veneer with a compression rate of 30 to 70%. As can be seen in the examples described later, the hot-press roll Using a press, it is processed to form a softwood consolidated veneer for a molded plywood core material and / or a surface material with a compression rate of 30 to 70% under normal temperature to 300 ° C. and heating and pressurizing conditions with a roll interval. Furthermore, using a hot-press roll press, it is heated and pressed to compress a coniferous tree for a surface material having a compression ratio of 30 to 70%, and a conifer for the surface material having a compression ratio of 30 to 70%. Compressibility than consolidated veneer To produce the softwood consolidation veneer for low core is desirable.

    In the polishing step, these various softwood compacted veneers are polished and / or sized, and are used as surface material softwood consolidated polishing veneers and core material softwood consolidated polishing veneers. 2 sheets of softwood compaction polishing single plate for surface material, and one softwood compaction polishing single plate for core material is laminated, glued and pressed in a sandwich shape to form a softwood consolidation plywood, and later lamination, adhesion and molding process Can be processed and placed to obtain a softwood consolidated plywood molded body.

    The polishing process is a process that improves the bending Young's modulus of the softwood consolidated veneer consolidated by the previous process, suppresses swelling, and improves the adhesion performance in the subsequent laminating, bonding, and molding processes. Polishing the softwood consolidated veneer Processing and / or insizing processing to form a softwood compacted single veneer, and as shown in the examples described later, the softwood compacted single plate is polished using abrasive paper having a roughness of P100 to 240 It is desirable to process and / or insize, and use an insizing machine to make incisions that are evenly distributed over the entire surface of the coniferous consolidated veneer with a blade or the like, or to penetrate the thickness of the coniferous consolidated veneer The fiber cutting layer can be made by making incisions, for example, in the softwood consolidated veneer for core material, the incisions uniformly distributed on both the front and back surfaces Or cuts that are uniformly distributed so as to penetrate the wall thickness, and the softwood compact veneer for the surface material has notches distributed uniformly on the back surface only or on both the front and back surfaces. Or cuts that are uniformly distributed over the entire surface so as to penetrate through the wall thickness, and the softwood consolidated veneer for the same surface material will eventually be exposed on the surface of furniture, fittings, etc. In some cases, it is desirable to process the exposed surface so that the incision marks are not exposed.

    The bonding process is a process that is required when a softwood compacted veneer for core material and a softwood consolidated veneer for surface material are manufactured by heating and pressurizing using a hot press roll press in the previous compaction process. In addition, two sheets of coniferous compaction polishing single plate for surface material are bonded via an adhesive, and one sheet of coniferous compaction polishing single plate for core material is laminated, bonded and pressed to form a coniferous consolidation plywood. In the adhering step and / or the laminating / adhering / forming step described later, when the pressing time is set to 10 minutes or more and the forming temperature is heated to 10 ° C. or more from room temperature, the forming temperature decreases by 10 ° C. or more. It is better to regulate either to maintain the pressing state until the molding temperature is maintained, or to maintain the pressing state until the molding temperature is reduced to the normal temperature when the molding temperature is heated to room temperature or higher. In addition, an adhesion process, and / or Other, heating the laminate, adhesion, molding process which will be described later, the by low voltage heating or high-frequency heating is preferable.

    The cutting step is a step of cutting out a conifer-consolidated contour plate of a desired shape and size so as to obtain a conifer-consolidated plywood molded body of a desired shape in the subsequent layering, bonding, and forming step, and conifer consolidation obtained by the previous polishing step The softwood compacted contour plate should be cut out from the polished veneer, and the softwood consolidated polished single plate should be cut into at least one desired shape to cut out a plurality of softwood consolidated contour plates .

    The lamination / adhesion / molding step is a step of integrating a plurality of softwood consolidated contour plates manufactured in the previous cutting step to obtain a softwood consolidated plywood molded body having a desired shape and size, and at least one predetermined shape Lamination, adhesion, heating, pressurization, and molding to form a coniferous consolidated plywood of the desired shape and dimensions so as to obtain a curved shape with a desired curvature in the laminating direction via an adhesive between a plurality of softwood consolidated contour plates As shown in the examples to be described later, after this process, the final polishing finishing process and the softwood consolidated plywood molded body are made into flame retardant and transparent paint. The painting process of painting can be performed.

    The heating method used in the steps such as molding and consolidation can be steam heating, low-voltage heating, high-frequency heating, electronic heating, trowel, hot water bottle, heating wire, hot press, drying room, etc. It is desirable to adopt low-voltage heating and high-frequency heating that are less likely to adversely affect swelling and coniferous materials, and in the bonding process, it is possible to suppress swelling after completion by setting a small amount of coating, For example, urea resin adhesive, melamine / urea co-condensation resin adhesive, melamine resin adhesive, aqueous polymer isocyanate adhesive, epoxy resin adhesive, resorcinol resin adhesive, phenol resin adhesive, phenol / melamine co-condensation resin Adhesives, resorcinol / phenol co-condensation resin adhesives, and the like can be used.

    Furthermore, the average bending Young's modulus of the softwood consolidated plywood molded body manufactured to a certain shape by the coniferous material consolidation and molding method is determined, and the average bending Young's modulus of the hardwood plywood manufactured to the same shape is determined in advance. In addition, the amount of deflection when a constant allowable static load is applied to the hardwood plywood having a predetermined thickness dimension is measured, and when a constant allowable static load is applied to the softwood consolidated plywood molded body based on the average bending Young's modulus, In addition to calculating the required thickness dimension that provides the same amount of bending as the hardwood plywood, the final finished thickness dimension of the softwood compacted plywood molded body can be regulated and substantially matched with the required thickness dimension.

The furniture of the present invention is a furniture part made of a softwood consolidated plywood molded body manufactured by the method of consolidating and forming the softwood material that forms the basis of the present invention, and is incorporated as a strength part at an appropriate place where it is exposed. Part or all may be made of a softwood consolidated plywood molded body produced by the method for consolidating and molding softwood material that forms the basis of the present invention.
In the following, the structure of the present invention will be described in detail together with an embodiment representative of the present invention shown in the drawings.

The drawings show some typical embodiments embodying the technical idea of the softwood consolidation and molding method of the present invention and the furniture manufactured thereby.
It is a flowchart which shows an example of a softwood material consolidation and shaping | molding method. It is a flowchart which shows the other example of the coniferous material consolidation and shaping | molding method. It is a perspective view which shows a coniferous tree material. It is a perspective view which shows a sawing process. It is a perspective view which shows the cutting process by a slicer. It is a perspective view which shows the cutting process by a rotary race. It is a perspective view which shows a consolidation process. It is a perspective view which shows a grinding | polishing process. It is a perspective view which shows a coniferous compaction polishing single plate. It is a perspective view which shows an example of a lamination | stacking, adhesion | attachment, and a formation process. It is a perspective view which shows the other example of a lamination | stacking, adhesion | attachment, and a formation process. It is a perspective view which shows the softwood consolidation polishing single board for core materials. It is a perspective view which shows the adhesion | attachment process which manufactures a softwood consolidation plywood. It is a perspective view which shows an example of a softwood consolidation plywood. It is a perspective view which shows the other example of a softwood consolidation plywood. It is a perspective view which shows a cutting process. It is a perspective view which shows an example of the softwood compacted plywood molded object manufactured in the lamination | stacking / adhesion / molding process. It is a perspective view which shows the laminated structure of a lauan plywood. It is a perspective view which shows another laminated structure of a lauan plywood. It is a perspective view which shows the laminated structure of a conifer plywood. It is a perspective view which shows another laminated structure of a conifer plywood. It is a side view which shows the frame for chairs as a softwood consolidation plywood molded object manufactured in a lamination | stacking, adhesion | attachment, and a formation process. It is a perspective view which shows the frame for chairs as a softwood consolidation plywood molded object. It is a perspective view which shows the combined state of the flame | frame for chairs as the components for furniture which consist of a softwood compacted plywood molded object. It is a perspective view which shows the chair as furniture incorporating the frame for chairs which is components for furniture. It is a box-and-whisker diagram which shows the recovery rate by swelling of a cedar consolidation single board and a veneer. It is a box-and-whisker diagram which shows the recovery rate by swelling of a cedar consolidation single board 5 ply molded product. It is explanatory drawing which shows the thickness dimension after the swelling of an insizing process cedar compaction board. It is explanatory drawing which shows the thickness dimension after swelling of a cedar compaction board from which compaction temperature control differs. It is explanatory drawing which shows the thickness dimension after the swelling of a cedar consolidation plywood from which manufacturing conditions differ. It is a box-and-whisker diagram which shows each bending strength of a cedar consolidation plywood from which production conditions differ. It is a box-and-whisker diagram which shows each bending Young's modulus of a cedar consolidation plywood from which production conditions differ.

    The examples shown in FIGS. 1, 3 to 11, 14, 16, 17, 22 to 25 are obtained by sawing coniferous wood material 1 that has been cut A in the sawing process B and slicing it in the cutting process C. The processed softwood veneer 11 and / or the softwood veneer 12 are heated and pressurized in the consolidation step D to form the softwood consolidated veneer 13 and then the softened wood veneer 13 is polished and / or processed in the polishing step E. After the sizing process is performed to form the softwood compacted single plate 16, the cutting process G is cut into at least one kind of desired shape to cut out a plurality of softwood consolidated contour boards 20, and at least by the lamination / adhesion / molding process H, Lamination, adhesion, heating, pressurization, one kind of predetermined shape, a plurality of softwood consolidated contour plates 20, 20,... It was to obtain a softwood compacted plywood molded body 3 of a desired shape and dimension and form, illustrates an embodiment representative of softwood compaction-molding method of the present invention.

    As can be clearly seen from these figures, the method for consolidating and forming coniferous wood according to the present invention is as follows, as shown in FIGS. 1 and 3, as coniferous wood 1,1,... The bark of cedar thinned wood 1,1,... Is peeled off to make a log as shown in FIG. 6, or as shown in FIGS. 4 and 5, in the lumbering process B, a lumber machine (for example, band saw), etc. Are processed to obtain lumbers 10, 10,... Of a predetermined shape and size by using a slicer by cutting process C to obtain a cedar projecting plate 11, or a rotary race is used as shown in FIG. The cedar veneer 11 and the cedar veneer 12 are 1.0 to 5.0 mm thick for a molded plywood core and 0.5 to 5 mm for a surface material. 2.0mm, predetermined width, predetermined length It is possible to chair processing.

    As shown by the white arrows in FIGS. 1 and 7, in the consolidation step D, the cedar projecting plate 11 and / or the cedar single plate 12 is supplied to the hot-press roll press in the fiber direction (the length direction of the annual rings). Then, heating and pressurization (compressed at room temperature to 300 ° C. at intervals of rolls) to form a cedar compacted single plate 13 with a compression rate of 30 to 70%. In this compacting process, a thickness is used using a sander. The three or more cedar projecting plates 11 and / or single cedar plates 12 should be stacked and pressed, and as shown in FIG. The compacted single plate 13 is polished using polishing paper having a roughness of P100 to 240 and / or insized using an insizing machine to obtain a cedar compacted polished single plate 16.

    As shown in FIG. 1 and FIG. 16, the cutting step G is performed by cutting a cedar compacted single plate 16 into a desired shape to form a plurality of cedar compacted contour plates 20, 20,. In the molding step H, at least one kind of predetermined shape and a plurality of cedar consolidated contour plates 20, 20,... Are aligned with the fiber direction (the length direction of the annual rings) aligned as indicated by the solid arrows in FIG. Or, as indicated by the solid arrows in FIG. 11, the fiber directions (the length direction of the annual rings) are overlapped so that the vertically adjacent ones cross each other, and the white arrows in FIG. 10 or FIG. 11 As shown in FIG. 14, each of the cedar compacted contour plates 20, 20,... Is joined and integrated in the laminating direction via an adhesive P between them, and for example, a corrugated square bar shape shown in FIG. The curved shape with the desired curvature in the stacking direction. Thus, a cedar compacted plywood molded body 3 having a desired shape and size is obtained by laminating, bonding, heating, pressing and molding under the conditions of 80 to 110 ° C. and 5 to 20 kgf / m 2. Radiates naturally until the temperature of the mold heated to 80-110 ° C by low-voltage heating or high-frequency heating decreases to 50 ° C or less, and at the same time maintains a constant clamping pressure of 5-20 kgf / m2 Can be controlled.

    In the lamination / adhesion / molding step H, as shown in FIGS. 22 and 23, a plurality of cedar compacted contour plates 20, 20,... Are mounted on the mold 5 so as to overlap each other via an adhesive P. Then, under the conditions of 80 to 110 ° C. and 5 to 20 kgf / m 2, pressurization as shown by the white arrow in FIG. 22, bonding, heating and molding, as shown in FIG. 23, the left and right frames of the chair After obtaining the cedar compacted plywood molded bodies 3 and 3, as shown in FIGS. 24 and 25, the chair frame 30 is assembled, and if necessary, the chair frame 30 including the cedar compacted plywood molded bodies 3 and 3 by a painting process. After coating and drying a flame-retardant and transparent paint, a cushion 31 serving as a seat and a backrest is attached to complete a chair (furniture) 4.

(Operation / Effect of Example 1)
The cedar material compaction / molding method according to the present invention having the above-described configuration was cut down as shown in FIGS. 1, 3 to 11, 14, 16, and 22 to 25, respectively. The cedar thinned timber 1,1,... As the cedar is made into lumber 10, 10,... In the lumber process B, and the cedar veneer 11 and / or the cedar veneer 12 sliced in the cutting process C are consolidated. A hot pressing roll press by D, sandwiched between rollers rolling in the fiber direction (longitudinal ring length direction) from room temperature to 300 ° C., feeding and moving while pressing to form a cedar compacted single plate 13, and polishing step After polishing and / or sizing to form a cedar compacted single plate 16 by E, the bending Young's modulus is increased to suppress swelling, and then a plurality of cedar consolidated contour plates 20, 20 are cut by a cutting step G. , Are cut out, and in the lamination / adhesion / molding step H, a plurality of cedar compacted contour plates 20, 20,..., 80 to 110 ° C. and 5 to 20 kgf / m 2 with an adhesive P interposed between them. Since the cedar compacted plywood molded body 3 having a desired shape and size is obtained by laminating, bonding, heating, pressing and molding so as to obtain a curved shape having a desired curvature in the laminating direction, the fiber direction (longitudinal ring length direction) ), The bending strength in the crossing direction is strengthened, and the laminated structure of cedar compacted contour plates 20, 20,... The strength of the cedar wood, which has been considered difficult until now, has been improved, and the surface hardness has been improved, so that a high-quality chair (furniture) 4 with excellent aesthetics can be achieved. It is possible to enable efficient and stable production Characterized further cedar thinnings 1,1, effective use in fine furniture was soo are the aesthetics of ..., an effect that it is possible to provide a new added value.

    2 to 9, FIG. 12, FIG. 13, FIG. 15 to FIG. 17 and FIG. 23 to FIG. 25, the coniferous wood material 1 that has been cut A is used as the lumber 10 by the lumbering step B, and the cutting step C And processed into a softwood veneer 11 and / or a softwood veneer 12 and heated and pressurized in the consolidation step D to form a core softwood consolidated veneer 14 and a surface softwood consolidated veneer 15 respectively. After being obtained, the various softwood compacted veneers (14, 15) are polished and / or sized by the polishing step E, and the softwood consolidated polishing veneer 17 for the core material and the softwood consolidated polish for the surface material are processed. In addition to the veneer 18, the core material softwood consolidation polishing veneer 17 is sandwiched between the two surface material softwood consolidation polishing veneers 18 and 18 through the adhesive P in the bonding process F. Lamination / Attach and pressurize into a softwood consolidated plywood 2 and cut at least one desired shape in the cutting process G to cut out a plurality of softwood consolidated contour plywood 21 and at least one kind of laminating / adhering / forming process H Predetermined shape, multiple softwood compacted contour plywood 21, 21, ... Laminated, glued, heated, pressed, molded in desired shape in the laminating direction with adhesive P between them Another embodiment of the method for consolidating and forming the softwood material according to the present invention, in which the softwood compacted plywood molded body 3 having the dimensions is obtained, is shown.

    As shown in FIG. 2, FIG. 9 and FIG. 12, the method for consolidating and forming the coniferous wood material of the present invention is the lumber obtained from the cedar thinning material 1 as the coniferous wood material 1 by the cutting step C following the cutting step A and the lumbering step B. 10 is sliced and the thickness T is regulated to 1.0 to 5.0 mm for the molded plywood core, and the thickness t is regulated to 0.5 to 2.0 mm for the surface material. Then, a cedar veneer 11 and / or a cedar veneer 12 having a predetermined width and a predetermined length are manufactured. As shown in FIG. 7, as shown in FIG. Regulating and pressurizing to obtain a cedar consolidated veneer 13 having a compression rate of 30 to 70%, and as shown in FIG. 12, a cedar veneer 11 having a thickness T for a molded plywood core of 1.0 to 5.0 mm And / or from the cedar veneer 12, the thickness T is 0.3 to 3.5 m. In addition to obtaining the cedar compacted single plate 14 for the core material, the thickness t is 0.15 to 1 from the cedar projecting plate 11 and / or the cedar single plate 12 having a thickness t of 0.5 to 2.0 mm for the surface material. A cedar compacted veneer 15 for a surface material of 4 mm is obtained.

    As shown in FIG. 8, in the polishing step E, the cedar compacted single plates 13 (14, 15) are polished using a polishing paper having a roughness P100 to 240 and / or an insizing machine is used. The cedar compacted single plate 16 is obtained by sizing, the cedar compacted single plate 14 for the core material is the cedar compacted single plate 17 for the core material, and the cedar compacted single plate 15 for the surface material is The surface material is a cedar compacted polishing single plate 18.

    As shown in FIGS. 2, 13, and 15, one core material cedar is formed by two surface material cedar compacted polishing single plates 18, 18 via an adhesive P in the bonding step F. The cedar consolidation plywood 2 is formed by laminating, adhering and pressing the compaction polishing single plate 17 in a sandwich shape, and the superposition of the cedar compaction polishing single plates 18 and 18 for the surface material and the cedar consolidation polishing single plate 17 for the core material is shown in FIG. As shown in FIG. 13, the fiber direction is aligned, or as shown in FIG. 13, the fiber directions (the length direction of the annual rings) of the vertically adjacent ones of the overlapping are arranged to cross each other. In addition, the fiber direction (the length direction of the annual rings) can be appropriately set according to the required performance so as to be laminated by changing the angular arrangement other than the 90 ° unit in the circumferential direction.

    As shown in FIG. 16, a plurality of cedar compacted plywoods 2, 2,... Are cut into at least one desired shape by cutting process G to cut out a plurality of cedar consolidated contour plywoods 21, 21,. By the lamination / adhesion / molding step H, at least one kind of predetermined shape, a plurality of cedar compacted contour plywoods 21, 21,... The fiber direction (annual ring length direction) is aligned and overlapped, or, as indicated by the solid line arrow in FIG. 11, the fiber direction (annual ring length direction) is overlapped so that the vertically adjacent ones cross each other. Furthermore, as shown in the white arrow in FIG. 10 or FIG. 11 and FIG. 14, while joining in the stacking direction, for example, a curved shape with a desired curvature in the stacking direction so as to have a corrugated square bar shape shown in FIG. 80-1 as you do 0 ° C., under the conditions of 5~20kgf / cm2, lamination, adhesion, heat and pressure-molded into so as to obtain a cedar compacted plywood molded body 3 of a desired shape and dimension.

In the lamination / adhesion / molding step H, as shown in FIGS. 22 and 23, a plurality of cedar compacted contour plywoods 21, 21,... Are attached to the mold 5 so as to overlap each other via an adhesive P. , Under pressure of 80 to 110 ° C. and 5 to 20 kgf / cm 2, pressurization as shown by the white arrow in FIG. 22 and bonding, heating and molding, and as shown in FIG. After obtaining the molded bodies 3 and 3, as shown in FIGS. 24 and 25, the chair frame 30 is assembled, and if necessary, the chair frame 30 including the cedar compacted plywood molded bodies 3 and 3 is formed by a painting process. After applying a flame-retardant and transparent paint and curing the coating film, the seat (furniture) 4 is completed by attaching the cushion 31 serving as a seat and a backrest.
The tightening time of the lamination / adhesion / molding process H is such that the mold temperature heated to 80 to 110 ° C. by low-voltage heating or high-frequency heating is naturally radiated until the temperature drops below 50 ° C. Thus, the tightening pressure of 5 to 20 kgf / m 2 can be controlled to be kept constant.

(Operation / Effect of Example 2)
As shown in FIGS. 2, 3 to 9, 13, 15, 16, and 22 to 25, the method for consolidating and forming the softwood material taken up in Example 2 of the present invention is as follows. After obtaining the cedar consolidated veneer 14 for the core material and the cedar consolidated veneer 15 for the surface material by the consolidation process D, the cedar consolidated polished veneer 17 for the core material is polished and / or sized by the polishing process E. In addition, the surface material cedar consolidation polishing veneer 18 is used, and the surface material cedar consolidation polishing veneers 18 and 18 are bonded to each other through the adhesive P in the bonding process F. By laminating, adhering and pressing the single plate 17 in a sandwich shape to obtain a cedar compacted plywood 2, high strength can be obtained and the yield of the cedar material 1 can be improved. Molded body 3 and incorporating it It is possible to more efficient mass production of chairs (furniture) 4 made of.

In general, it is known that consolidation of cedar wood that has been subjected to consolidation is restored by the influence of moisture. The experiment to confirm was implemented as follows.
As a specific experimental method, a compacted single plate, a compacted projecting plate, and a compacted single plate 5-ply product were each immersed in water at 30 ° C. for 1 hour, and the thickness dimensions before and after the immersion were measured. Table 1 shows the breakdown of sample specifications.

    The thickness dimension after the consolidation and after 5-ply molding was set as the initial value, and the thickness after immersion for 1 hour was measured to obtain a recovery rate as shown in FIGS. As a result, the cedar compacted veneer with a thickness of t2.5 mm can suppress swelling due to dipping to some extent by polishing, and the 5-ply molded product is dipped with about 115% of the sample B that has been subjected to polishing treatment in particular. It can be said that the swelling due to the water is strongly suppressed and the consolidation is fixed, and it is proved that the function of suppressing the swelling due to water can be added by the polishing process E (shown in FIGS. 1 and 2). It was done.

    18 to 21, Table 2 and Table 3, the method for consolidating and forming the softwood material according to the present invention obtains each average bending Young's modulus of a cedar compacted plywood molded body manufactured in a certain shape, and The average bending Young's modulus of the hardwood plywood produced in the same shape was determined in advance, the amount of deflection when a certain allowable static load was applied to the hardwood plywood of a predetermined thickness was measured, and based on the average bending Young's modulus, When a certain allowable static load is applied to the softwood compacted plywood molded body, the required thickness dimension that results in the same amount of deflection as the hardwood plywood is calculated, and the final finished thickness dimension of the softwood consolidated plywood molded body is calculated as the required thickness. It is an example of what is regulated and manufactured so as to substantially match the dimensions.

As shown in FIG. 18, a rectangular flat plate of a predetermined size, and a lauan single plate for core material as a hardwood plywood cut so that the fiber direction is parallel to the short side, is also a rectangular flat plate, and the fiber direction is the long side. Lauan plywood (hardwood plywood) A, laminated with lauan veneer for surface material (hardwood veneer veneer for surface material) cut to be parallel to the surface, and pressed and integrated with an adhesive, and FIG. As shown in the figure, a rectangular flat plate and a lauan single plate for core material (hardwood single plate for core material) cut so that its fiber direction is parallel to the long side are also rectangular flat plates, and its fiber direction is long. Lauan plywood (hardwood plywood) B, which is made by laminating lauan veneer for surface material (hardwood single veneer for surface material) cut so as to be parallel to the side, and pressed and integrated with an adhesive, and FIG. As a rectangular flat plate with the fiber direction parallel to the long side Cedar veneer for core material (conifer veneer veneer for core material) cut into a rectangular plate and cedar compacted veneer for surface material cut so that its fiber direction is parallel to the long side (conifer for surface material) A cedar compacted plywood (coniferous compacted plywood) C, which is laminated by pressing and integrating with an adhesive, and a rectangular flat plate as shown in FIG. 21, with the fiber direction parallel to the short side. Cedar veneer for core material (conifer veneer veneer for core material) cut in such a way, it is also a rectangular flat plate, and cedar compacted veneer for surface material cut so that its fiber direction is parallel to the short side 10 cedar compacted plywoods (coniferous consolidated plywood) D formed by laminating and veneering with an adhesive, and bending each of them as shown in Tables 2 and 3 Average values of strength and bending Young's modulus were obtained.

Referring to Table 2 and Table 3 above, it is required when replacing the shelf board made of Lauan plywood having a width of 200 mm, a length of 870 mm, and a thickness of 25 mm with a shelf board made of the cedar compacted plywood molded body. An example of examining the thickness dimension is shown below.
Since the total weight of the books placed on the lauan plywood shelf is full 60 kg in length, the amount of deflection at the center of the shelf at this time is an equally distributed load supported at both ends. 1) is established.

When calculated for the Lauan plywood B, the following (Formula 2) is obtained.

    When calculated for the cedar compacted plywood C, it is found that δmax = 6.29, and the amount of bending is large. When the thickness is changed so as to be the same amount as that of the lauan plywood, the thickness is 28.5 mm = δmax4. A value of 25 mm can be obtained, and when using a cedar compacted plywood C as a shelf for a bookcase, by making the thickness 28.5 mm, the amount of deflection is the same as that of a 25 mm thick shelf made of Lauan plywood It becomes possible to suppress to.

(Operation / Effect of Example 3)
As shown in FIGS. 18 to 21 and Tables 2 and 3, the softwood material consolidation / molding method of the invention shown in this embodiment is composed of Lauan plywood A and B and the cedar material consolidation / By measuring in advance the average value of the bending Young's modulus in each of the cedar compacted plywoods C and D produced by the forming method and grasping it as known information, the bending strength achieved by the lauan plywoods A and B is equal to or higher than that. The thickness dimensions of the cedar compacted plywood C and D, which will be the bending strength, can be easily obtained, and the thickness dimension of the cedar compacted plywood molded body to be replaced with Lauan plywood parts can be calculated accurately and quickly. Therefore, it is possible to produce a cedar compacted plywood molded body without trial production, and thus a great advantage can be obtained that the production efficiency can be greatly increased.

    When laminating with a flat press assuming a cedar compacted plywood molded body, swelling that seems to be due to the effect of internal pressure occurred, so we examined the countermeasures for it and made a cedar compacted plywood consisting of multiple cedar compacted single plates. The sample was subjected to a bending test to obtain physical property data, which will be used as a reference for the production of cedar compacted plywood moldings in the future.

With the aim of reducing swelling due to internal pressure, examination was performed by changing the presence or absence of insizing processing and the pressing temperature, and as shown in FIGS. 28 and 29, after the bonding step (shown by F in FIG. 2) The thickness dimension of each point was measured and the degree of swelling was confirmed. The numerical value displayed on each part of the cedar compacted plywood 2 in FIGS. 28 and 29 is the thickness dimension (unit: mm) after swelling.
(Test conditions)
Material: Cedar compacted plywood using cedar compacted veneer (thickness t2.5 mm, half rotary 40% compacted product) (10 plys with the same grain direction)
Adhesive: UM-055 (application by hand roller)
Clamping pressure: 14kg / cm2 (Air press)

Furthermore, as shown in FIG. 30, tests were performed on the amount of adhesive applied and the effect of sanding.
(Test conditions)
Material: Cedar compacted plywood using cedar compacted veneer (thickness t2.5 mm, half rotary 40% compacted product) (10 plys with the same grain direction)
Adhesive: UM-055 (applied with glue spreader)
Clamping pressure: 15kg / cm2 (hydraulic press)

As a result of the test on the effect of swelling due to the presence or absence of the insizing process and the change in the pressing temperature, and the effect on the amount of adhesive applied and the anti-swelling effect of the sanding process, the following results were obtained. Obtained.
(Evaluation of effects on swelling)
(1) Without insizing> With insizing (2) Large amount of adhesive applied> Small amount of adhesive applied (3) No sander ≥ With sander (4) Core material> Sapwood
From the results as described above, it was found that the effects of insizing and sanding were slightly observed, and there was a difference in the swelling dimension depending on the amount and part of the adhesive applied.

Next, a bending test of JIS K 7171 was performed on a cedar compacted plywood (10 plies with the same grain direction) using a cedar compacted single plate (thickness t2.5 mm, half rotary 40% compacted product). The thickness and bending Young's modulus were determined.
(Adhesion conditions)
Adhesive: UM-055
Set temperature: 100 ° C
Clamping pressure: 14.3 kg / cm 2
Clamping time: 10 minutes (A to C) and 50 minutes (D, E)
Adhesive application: Hand roller

(Test specimen)
A: No sander B: Double-sided sander processing (wide bent sander of adhesive team)
C: Insizing processing D: Clamping time change product of A (set by pressing temperature 100 ° C → 80 ° C)
E: Product whose C clamping time has been changed (set at a clamping temperature of 100 ° C → 80 ° C)
(Test conditions)
The specimens A to C have N = 20
D and E are N = 5 (the number was reduced because of the long pressing time)

FIG. 31 and FIG. 32 show the bending strength and bending Young's modulus of each cedar compacted plywood with different production conditions obtained by this test.
As shown in Tables 4 and 5 below, as a result of analysis of variance for bending Young's modulus data of A and B and A and C with the same pressing conditions, the D and E types have a long pressing time. It seems that both bending strength and bending Young's modulus were high. However, the performance of the in-sizing E type is lower than that of the D type, which is the A type without sander pressed for 50 minutes. Increased testing seems necessary.

(Consideration of test results)
From this test, the occurrence of swelling is affected by the amount of adhesive applied, the part of the material, and processing such as insizing. 2), the bending Young's modulus is improved even when the bending strength is similar, and the pressing time is set until the temperature drops to some extent. In this case, it was found that the degree of swelling was suppressed and both bending strength and bending Young's modulus were improved.

From the above results, at least the adhesion process F (shown in FIG. 2) and / or the lamination / adhesion / molding process H (shown in FIGS. 1 and 2) in the method for consolidating and molding the softwood material of the present invention. In addition, if the set temperature is constant, swelling is likely to occur after production. In the case of low-voltage heating or high-frequency heating, it can be assumed that the degree of swelling is low, and the standing time under pressurized conditions should be set longer. As a result, it was found that the bending strength and bending Young's modulus can be improved. Reference values are listed below for comparison with hardwood.
(Reference value)
Beech molded plywood Bending strength = 100-110 MPa
Young's modulus = 8.0 to 10.0 GPa
Cedar (solid wood) Bending strength = 65 MPa
Young's modulus = 7.5 GPa
Cedar structural plywood Bending strength = 20-25MPa
Young's modulus = 4.5 to 5.7 GPa

(Conclusion)
As described above, the softwood consolidation and molding method of the present invention and the furniture manufactured thereby enable the intended purpose to be achieved evenly by the new configuration, and can be easily manufactured. Compared to the technology for forming hardwood plywood, the use of coniferous wood, which has been considered difficult to use economically so far, not only significantly increases the profitability of forest management, but also protects forests. In the past, it was not possible to use coniferous wood for high-quality furniture and fittings because of the disadvantage of insufficient strength. The forestry industry, which has been giving up the effective use of coniferous wood, has so far been able to solve the problems and make mass production economically possible and greatly improve production efficiency. This , Become the be rated higher in the furniture industry and joinery industry to be struggling to get the hardwood, available across a wide range, is expected to be those that continue to spread.

A Cutting process B Sawing process C Cutting process D Consolidation process E Polishing process F Adhesion process G Cutting process H Lamination / Adhesion / Formation process 1 Cedar thinning (coniferous wood)
10 Same lumber
11 Same cedar veneer (conifer veneer)
12 Same cedar veneer (conifer veneer)
13 Same cedar consolidated veneer (coniferous consolidated veneer)
14 Cedar consolidated veneer for core material (conifer consolidated veneer for core material)
15 Cedar consolidated veneer for surface material (coniferous consolidated veneer for surface material)
16 Same Cedar Consolidation Polished Single Plate (Conifer Consolidation Polished Single Plate)
17 Cedar compacted single veneer for core material (coniferous compacted single plate for core material)
18 Cedar consolidation polishing veneer for surface material (Coniferous consolidation veneer for surface material)
2 Cedar consolidated plywood (coniferous consolidated plywood)
20 Same cedar compacted contour board (coniferous compacted contour board)
21 Same cedar compacted contour plywood (conifer compacted contour plywood)
3 Furniture parts (cedar compacted plywood molded body, softwood consolidated plywood molded body)
4 Chair (furniture)
P adhesive

Claims (11)

    Cut the conifer wood that has been harvested in the sawing process, and cut the conifer veneer and / or conifer veneer that has been sliced into a predetermined thickness, a predetermined width or more, and a predetermined length or more in the cutting process. Used, heated and pressurized to form a coniferous consolidated veneer having a compression rate of 30 to 70%, and then polished and / or sized in the polishing process to obtain a coniferous consolidated veneer veneer After that, at least one kind of desired shape is cut by a cutting process, and a plurality of coniferous consolidated contour plates are cut out, and at least one kind of predetermined shape, between a plurality of coniferous consolidated contour plates are laminated, bonded and formed. In order to obtain a curved shape having a desired curvature in the laminating direction via an adhesive, a softwood compacted plywood molded body having a desired shape and size is obtained by laminating, bonding, heating, pressing and molding. about Softwoods compaction-molding method characterized.     Cut the conifer wood that has been harvested in the sawing process, and cut the conifer veneer and / or conifer veneer that has been sliced into a predetermined thickness, a predetermined width or more, and a predetermined length or more in the cutting process. Used for heating and pressurizing softwood compacts for surface materials with a compression ratio of 30 to 70%, and for core materials having a compression ratio of 30 to 70% and a lower compression ratio than the softwood compaction boards for surface materials After obtaining the softwood compacted veneer, the various softwood consolidated veneers are polished and / or sized in the polishing process, and the softwood consolidated polished veneer for the surface material and the softwood consolidated polished veneer for the core material In addition, in the bonding process, two sheets of coniferous consolidated polishing single sheets for surface material are bonded via an adhesive, and one sheet of coniferous consolidated polishing single sheet for core material is laminated, bonded and pressed in a sandwich shape to form conifers. Consolidated plywood and at least in the cutting process Cut out a plurality of softwood consolidated contour plywood by cutting into one type of desired shape, at least one kind of predetermined shape in the lamination / adhesion / molding process, via an adhesive between the plurality of softwood consolidated contour plywood, A softwood material characterized in that a softwood compacted plywood molded body having a desired shape and dimensions is obtained by laminating, adhering, heating, pressing and molding so as to obtain a curved shape having a desired curvature in the laminating direction. Consolidation / molding method.     Coniferous veneer and / or conifers sliced into a thickness of 1.0 to 5.0 mm for a molded plywood core material, a thickness of 0.5 to 2.0 mm for a surface material, a predetermined width and a predetermined length in a cutting process The method for consolidating and forming a softwood material according to any one of claims 1 and 2, wherein a veneer is obtained.     Softwood for molded plywood core material and / or surface material having a compression ratio of 30 to 70% under normal temperature to 300 ° C. and heating / pressurizing conditions by roll interval using a hot press roll press in the consolidation step The method for consolidating and forming a coniferous material according to any one of claims 1 to 3, wherein the single veneer is a consolidated single plate.     In the bonding process and / or in the lamination / bonding / molding process, when the pressing time is 10 minutes or more and the molding temperature is heated to 10 ° C. or more from room temperature, the pressure is reduced until the molding temperature decreases by 10 ° C. or more. 5. The method according to claim 1, wherein the clamped state is maintained, or when the molding temperature is heated to a room temperature or higher, the pressure clamped state is maintained until the molding temperature is lowered to the room temperature. The method for consolidating and forming a softwood material according to any one of the above.     The method for consolidating and molding softwood according to any one of claims 1 to 5, wherein heating by low-voltage heating or high-frequency heating is performed in the bonding step and / or the lamination / bonding / molding step.     The coniferous material consolidation according to any one of claims 1 to 6, wherein in the polishing step, the softwood consolidation veneer is subjected to polishing and / or insizing using a polishing paper having a roughness of P100 to 240. Conversion / molding method.     The average bending Young's modulus of the softwood consolidated plywood molded body produced in a fixed shape by the method for consolidating and molding softwood material according to any one of claims 1 to 7 is determined, and the broadleaf wood plywood manufactured in the same shape as those The average bending Young's modulus is obtained in advance, and the amount of deflection when a constant allowable static load is applied to the hardwood plywood of a predetermined thickness is measured. Based on the average bending Young's modulus, the constant allowable static Manufactured by calculating the required thickness dimension that will be the same amount of bending as the hardwood plywood when a load is applied, and regulating the final finished thickness dimension of the softwood compacted plywood molded body to approximately match the required thickness dimension The method for consolidating and forming the softwood material according to any one of claims 1 to 7.     The softwood material consolidation according to any one of claims 1 to 7, wherein the softwood compacted plywood molded body is coated with a flame retardant, transparent paint in a coating process added after the lamination / adhesion / molding process. Conversion / molding method.     10. The method for consolidating and forming a coniferous material according to any one of claims 1 to 9, wherein a part or all of the coniferous material used is a coniferous thinning material and / or a conifer fallen wood.     A furniture part made of a softwood compacted plywood molded body produced by the method for consolidating and molding softwood material according to any one of claims 1 to 10 is incorporated as a strength part at an appropriate location to be exposed. Or furniture manufactured by the method for consolidating and forming softwood according to any one of claims 10 to 10.

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