JP2006327137A - Compressed wood processed product and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate compression molding and to form a woodgrain pattern full of a variety on a surface in spite of a small size in a compressed wood processed product, and its manufacturing method. <P>SOLUTION: In a blank member forming process, a plurality of wood pieces relatively short in length are arranged to be joined by an adhesive softened in a high temperature steam atmosphere and a sheetlike blank member 3 is formed using the formed relatively long laminated wood. In a compression molding process, the blank member 3 is compression-molded by upper and lower molds 5A and 5B having molding surfaces for transferring three-dimensional shapes to manufacture the compressed wood processed product wherein a plurality of the wood pieces are exposed and the respective wood pieces in the direction along the surface of a processed product body are joined in the longitudinal direction and the short-length direction of their outer shapes. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a compressed wood processed product and a method for producing the same.

Conventionally, it is known to form a compressed wood processed product having a three-dimensional shape by cutting a blank member from wood and compression-molding it using a mold.
On the other hand, in wood processing, a plurality of relatively small pieces of wood are joined to form a relatively large plate-like, columnar, or block-like laminated material. These laminated materials are used as building members such as pillars, beams, floor materials, etc., after being further cut into desired shapes or cut.
These laminated timbers are generally formed by bonding uncompressed wood pieces together with an adhesive. For example, in Patent Document 1, a plurality of thinned timbers are steamed and softened, and an adhesive layer is provided. And a method for producing the laminated wood compression-molded therewith.
In addition, as a related technique, Patent Document 2 discloses a wood material used as a plate-like building structural material such as a non-oriented wafer board, plywood, particle board, glulam, OSB (Oriented Strand Board), A method for preventing deformation of a woody material is described in which a heated superheated steam is injected and heated in a state where deformation is constrained by a mold.
JP-A-7-32325 (FIGS. 1-3) JP 11-320511 A (page 2-3)

However, the conventional compressed wood processed product and the manufacturing method thereof have the following problems.
Since these compressed wood processed products have a grain line appearing on the surface and a grain pattern appears, it is possible to obtain a good appearance in terms of design, but because the blank member is cut out from a relatively large base material For example, when a small compressed wood processed product is molded, in most cases, only a straight grain pattern can be obtained even if a grain material is used. Therefore, there is a problem that an excellent design effect due to the wood grain pattern cannot be obtained.
In addition, if it is absolutely necessary to obtain an excellent design effect by the wood grain pattern, it is necessary to limit the cutting position of the blank member to a specific part of the wood, which makes the blank member extremely expensive and difficult to mass-produce. There's a problem.
Moreover, the case where a blank member forms the blank member of a three-dimensional shape which follows a metal mold | die substantially from a block material by cutting, and the case where a plate-shaped blank member larger than the shape after compression is formed are considered. However, in the former, the wood of the part to be cut when processing the blank member is wasted, and in the latter, it is necessary to cut and cut to adjust the shape of the end of the molded product after compression molding. There is a problem that is consumed in vain. Therefore, for example, when expensive wood such as hinoki having antibacterial action is used, there is a problem that the cost of the material is likely to increase.
Moreover, in the technique of patent document 1, since a laminated lumber is formed using the thinning material of a small diameter, although the effective use of a thinning material can be aimed at and material cost can be reduced, the thinning material of a small diameter is used. It is intended to produce simple building materials such as columns and beams that are simply compressed. However, when molding boxes, storage containers, exterior bodies, and the like having various three-dimensional shapes, they are deformed along the mold surface, so that a tensile force acts in a direction crossing the compression direction during compression. Therefore, there is a problem that cracks occur in the wood during the compression process, and there is a possibility that a good appearance cannot be obtained.
In addition, it is conceivable to use the technique described in Patent Document 2 in a method for manufacturing a compressed wood processed product, but in this technique, adjacent layers of a plurality of layers in which strand-shaped pieces are oriented in a specific direction are orthogonal to each other. It is a plate-shaped deformation prevention processing method such as OSB which is arranged, shaped and bonded via an adhesive. Therefore, there is a problem that if the plate subjected to the deformation prevention process is compression-molded into a three-dimensional shape, a good molded product cannot be formed because the deformation is not easy.

  The present invention has been made in view of the above problems, and is a compressed wood processed product that is easy to compression-mold and can form a wood grain pattern rich in change even on a small surface, and its An object is to provide a manufacturing method.

In order to solve the above-described problems, the invention according to claim 1 is a method for manufacturing a compressed wood processed product in which a wood is compression-molded by a mold to form a three-dimensional shape, A blank member forming step of forming a blank member for compression molding by using a laminated material formed by relatively arranging a plurality of short wood pieces and joining them with an adhesive that softens in a high-temperature steam atmosphere And a compression molding step in which the blank member is compression-molded in a high-temperature steam atmosphere by the mold.
According to the present invention, the blank member is formed of the laminated material that is relatively long by arranging a plurality of relatively short pieces of wood and joining them with an adhesive that softens in a high-temperature steam atmosphere. When compressed in a steam atmosphere, the joining state between the plurality of pieces of wood is relaxed, and relative movement between the plurality of pieces of wood becomes possible. Therefore, it becomes easy to deform along the mold surface during compression molding. As a result, the stress load applied to the blank member during compression molding can be reduced, and compression molding can be performed without causing cracks in a plurality of pieces of wood.
Further, the grain lines of each piece of wood are satisfactorily deformed without being damaged by cracks and the like, and by combining them, a grain pattern rich in change is formed on the surface. Therefore, it is possible to easily obtain a wood grain pattern having an appearance with a high design effect.

  Here, the laminated material is formed in a relatively long shape and the plurality of pieces of wood are formed in a relatively short shape means that a main part of a surface compressed by a mold is formed when a blank member is formed from the laminated material. This means that the outermost width dimension of the surface of the laminated wood that is the shortest is larger than the width dimension in the longitudinal direction of the outer shape of the piece of wood that appears on the surface. Such a laminated lumber surface is a surface configured in a parquet shape in which a plurality of pieces of wood are joined in the lateral direction and also joined in the longitudinal direction.

The shape of the plurality of wood pieces is preferably a shape that can be in close contact with other wood pieces arranged at adjacent positions and can be relatively easily moved during compression. For that purpose, it is preferable to make it the shape which extended the flat surfaces or the cross section which mutually fits in a fixed direction, for example, the uneven | corrugated shape etc. which the cross section combined several mountain shape.
Moreover, in order to make the intensity | strength after shaping | molding favorable, it is preferable to make the longitudinal direction of several wood pieces into a wood fiber direction, and to compress in the direction which cross | intersects a wood fiber direction.

  The three-dimensional shape is a shape in which a mold surface shape having a three-dimensional unevenness and curvature is transferred, and means a shape in which cross-sectional shapes along one direction are not substantially the same. Excludes shapes and columnar shapes that are bent or curved two-dimensionally.

In the invention according to claim 2, in the processed compressed wood product according to claim 1, in the blank member forming step, the blank member is formed as a plate member made of the laminated material.
According to this invention, since the blank member is formed as a plate member, the removal process for forming the blank member can be eliminated or reduced, so that it can be manufactured easily and inexpensively. In particular, a three-dimensional shaped compressed wood processed product having a substantially uniform thickness can be easily manufactured.

In invention of Claim 3, in the manufacturing method of the compressed-wood processed goods of Claim 1, in the said blank member formation process, by cutting the said blank member from the said laminated material, A method of forming a three-dimensional blank member having a three-dimensional shape substantially along the shape of the mold surface is used.
According to this invention, since the blank member is formed as a three-dimensional blank member having a three-dimensional shape that substantially conforms to the shape of the mold surface of the mold, the amount of deformation other than in the compression direction is reduced during compression molding. That is, since the blank member is less likely to be pulled in the direction crossing the compression direction, the compression load can be reduced. Therefore, a three-dimensional shape, particularly a shape having a large undulation can be formed with high accuracy and high quality.
In addition, when cutting from laminated wood, various grain lines are exposed on the cut surface, so that a more varied grain pattern appears. Therefore, it is possible to obtain a grain pattern with more excellent design effect.

According to a fourth aspect of the present invention, in the method for manufacturing a compressed wood processed product according to the third aspect, the laminated material is formed in a three-dimensional shape slightly larger than the outer shape of the blank member.
According to this invention, since the laminated material is formed in a three-dimensional shape slightly larger than the outer shape of the blank member, the amount of processing can be reduced when cutting in the blank member forming process, and the manufacturing efficiency and the utilization efficiency of the laminated material Can be improved.

In invention of Claim 5, in the manufacturing method of the compressed-wood processed product of Claim 3 or 4, the said blank member formation process compression-molds the said laminated material, and forms a part of shape of the said blank member. A primary compression step of forming the formed primary compression member and a secondary processing step of cutting the primary compression member to form another part of the blank member are used.
According to this invention, the primary compression member that forms a part of the shape of the blank member is formed from the laminated material by the primary compression step, and the other shape of the blank member is formed by the secondary processing step. The cutting amount of the blank member can be reduced, and the production efficiency can be improved.
In addition, since compression molding and cutting can be used properly to form the blank member, the appearance of the wood grain pattern can be varied according to the processing method. For this reason, it becomes easier to change the grain pattern.
Further, when the laminated material is primarily compressed, a high compression portion and a low compression portion relative to the primary compression member are generally formed, although depending on the shape of the primary compression mold. Therefore, in the secondary processing step, by changing the cutting amount according to the distribution of such a high compression portion and low compression portion, it is possible to vary the compression ratio depending on the location in the compression molding step, It becomes possible to easily control the average density distribution of the compressed wood processed product.

According to a sixth aspect of the present invention, in the method for manufacturing a processed compressed wood product according to any one of the first to fifth aspects, the plurality of pieces of wood are made of thinned wood.
According to this invention, since a plurality of pieces of wood are made of thinned wood with little utility value, the material cost can be reduced, and it is possible to contribute to environmental conservation.

According to a seventh aspect of the present invention, in the method for manufacturing a compressed wood processed product according to any one of the first to sixth aspects, the plurality of pieces of wood are made of a plurality of wood materials.
According to the present invention, by combining a plurality of wood materials, for example, it becomes easy to change the appearance such as a wood grain pattern and color.
Further, by combining woods having different material characteristics, it is possible to obtain a multifunctional molded product in which the respective material characteristics are combined. Examples of different material properties include antibacterial properties, insect repellent properties, aromatic properties, strength, wear resistance, and the like.

According to an eighth aspect of the invention, in the compressed wood processed product according to any one of the first to seventh aspects, the plurality of pieces of wood are configured by combining woods having different average densities.
According to this invention, a plurality of pieces of wood are made of a combination of timbers having different average densities, so that the amount of deformation changes according to the respective average densities during compression. Even if it is, the size of each piece of wood changes after compression. Therefore, the surface grain pattern is rich in change.

According to a ninth aspect of the present invention, in the method for manufacturing a compressed wood processed product according to any one of the first to eighth aspects, a finger joint is formed on a plurality of pieces of wood constituting the laminated material.
According to the present invention, since the plurality of pieces of wood are joined by the finger joints, the finger joints are overlapped with each other and compressed and integrated when compressed, so that the joining strength is improved.
Moreover, since it is easy to expand in the direction away from each other in the opposing direction of the finger joint in the compression process, it is possible to absorb expansion deformation at the time of compression. Therefore, the compressive load is reduced, and the tensile load acting on the piece of wood can be reduced.
In addition, it is preferable to provide the direction which provides a finger joint in the edge part of the wood fiber direction side of a piece of wood. In this case, since the wood fibers are continuous with each finger portion of the finger joint, the strength of the finger joint can be increased. Further, since the sliding deformation can be caused in the direction of the wood fiber where the elongation deformation is difficult to occur due to the compression, the load in the elongation direction of the wood piece can be reduced, and the breakage and breakage of the wood fiber can be reduced.

The invention according to claim 10 is a compressed wood processed product in which a three-dimensional shape is formed by compression molding wood with a mold, and an adhesive layer that is softened in a high-temperature steam atmosphere is provided on the surface of the processed product main body. A plurality of wood pieces joined to each other are exposed, and the plurality of wood pieces exposed on the surface of the processed product body are at least a longitudinal direction and a short direction of the outer shape of each piece of wood in a direction along the surface of the processed product body. The structure is joined in the hand direction.
According to this invention, since the processed product body has a plurality of pieces of wood exposed on the surface, a wood grain pattern rich in change is formed on the surface as compared with the case of compression molding a single piece of wood. Therefore, it is possible to easily obtain a wood grain pattern having an appearance with a high design effect.
Further, a plurality of pieces of wood exposed on the surface of the processed product main body are joined via an adhesive layer that is softened in a high-temperature steam atmosphere in the longitudinal direction and the short side direction of each wooden piece at least in the direction along the surface of the processed product main body. Therefore, it can be manufactured using a relatively long laminated material obtained by joining a plurality of relatively short pieces of wood through such an adhesive layer. For this reason, for example, it is possible to manufacture by effectively using a short piece of wood using thinned wood or the like.
The compressed wood processed product of the present invention is manufactured by the method for manufacturing a compressed wood processed product according to claim 1.

  In the present specification, the three-dimensional shape of the three-dimensional blank member and the three-dimensional shape of the corresponding mold surface of the mold for compression-molding the three-dimensional blank member, that is, the three-dimensional shape of the compressed wood molded product, The term “almost along” includes the case where the shapes completely match and the case where the corresponding three-dimensional shape unevenness relationship substantially matches. In the latter case, the difference in height unevenness within the range of the compression allowance is neglected because the shape of the mold surface can be finally transferred.

According to the compressed wood processed product of the present invention, a plurality of pieces of wood are joined in the longitudinal direction and the transverse direction via an adhesive layer that is softened in a high-temperature steam atmosphere. A wood grain pattern can be formed on the surface, and a relatively short wood piece can be effectively used to achieve a multifunctional and inexpensive effect.
Further, according to the method for manufacturing a compressed wood processed product of the present invention, the load required for the deformation of the blank member can be reduced, and it can be easily compression-molded into a three-dimensional shape. As a result, it is possible to easily obtain a variety of wood grain patterns.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In all the drawings, even if the embodiments are different, the same or corresponding members are denoted by the same reference numerals, and common description is omitted.

[First Embodiment]
The processed compressed wood product according to the first embodiment of the present invention will be described.
Fig.1 (a) is a perspective explanatory view for demonstrating schematic structure of the compressed wood processed goods which concerns on the 1st Embodiment of this invention. FIG.1 (b) is AA sectional drawing of Fig.1 (a).

  The compressed wood processed product of the present embodiment is a member formed by compression-molding wood consisting of a plurality of pieces of wood with a mold, and each piece of wood exposed on the surface is on the surface of the processed product main body. Joined via an adhesive layer that softens in a high-temperature steam atmosphere in the longitudinal direction and short-side direction of the outer shape of the wood piece along the direction along the surface, and the complex wood grain due to the joint surface of the wood pieces and the annual rings of the wood pieces A pattern is formed. The three-dimensional shape is, for example, various three-dimensional shapes such as a box shape and a shell shape, and has a uniform or non-uniform thickness. For example, the three-dimensional shape is a suitable member for a box, a container, an exterior body, and the like. Yes. Hereinafter, as an example, a description will be given of an example of a box-shaped member in which side portions are formed on the bottom portion and the periphery thereof, open to one side, and having a substantially uniform thickness.

The compressed wood processed product 1 of the present embodiment has a three-dimensional shape formed by compression molding with a mold, and has a substantially rectangular shape in plan view as shown in FIGS. These are box-shaped members that are provided with side portions 1b, 1b, 1c, and 1c that are gently curved and erected around the bottom portion 1a and that have an opening 1d that is open on one side. An opening end 1e is formed at the end of the opening 1d by cutting.
An example in which the size of the opening 1d is short side W × long side L and the height is H from the opening end 1e to the outside of the bottom 1a will be described.
Although the wall thickness may vary, in the present embodiment, it will be described as having a substantially uniform wall thickness t.
The compressed wood processed product 1 can be used as, for example, a container or an exterior body.

The compressed wood processed product 1 is constructed by assembling a piece of wood 2 in a short block shape whose longitudinal direction substantially coincides with the wood fiber direction before compression through an adhesive layer P in the longitudinal direction and the lateral direction. The wood pieces 2 are joined in a compressed and deformed state by being compressed. The wood piece 2 exposed on the surface has a boundary line Q visible on the surface by the outer shape and the adhesive layer P along the outer shape. Since the outer shape of the wood piece 2 is deformed by compression, the boundary line Q is also irregularly waved.
Here, the piece of wood 2 is shorter than the long and short width dimensions L and W of the compressed wood processed product 1. Therefore, it is set as the joined state of the parquet work shape in which the plurality of wooden pieces 2 are joined in any width direction. The boundary line Q is formed in a mesh shape.
Further, as schematically shown in a part of FIG. 1A, the surface of the wood piece 2 is exposed in a state where a grain line obtained by cutting an annual ring of wood is distorted by compression. A grain pattern M composed of such grain lines is divided into a boundary line Q to form a combined pattern, and the surface of the compressed wood processed product 1 has a variety of grain patterns different from the grain pattern of mucwood. A pattern is formed.

The wood piece 2 is not particularly limited as long as it is compressible wood. For example, hinoki (cypress), hinoki (hiba), paulownia, teak, mahogany, cedar, pine, cherry blossom, bamboo and the like can be suitably employed.
These may be unified with one kind of material, but in the present embodiment, a plurality of materials are mixed. For example, it is possible to employ a configuration in which cedar thinning material is mixed as the wood piece 2a and birch thinning material is mixed as the wood piece 2b. Cedar, the average density of the base material of the cypress, respectively, about 0.38 g ^/ cm 3, but is different from the 0.41 g / cm ^3, for deforming according to the respective average densities together, compressed from wood As 1, the average density is substantially the same. Since the compression ratio increases in inverse proportion to the density, even if the shape is the same before compression, it is compressed into a different shape depending on the relative density with the adjacent wooden piece 2 and the boundary line Q becomes a distorted shape.
Even when the materials are unified, the wood piece 2 having different characteristics such as color, strength, and average density can be collected by changing the sampling position (for example, heartwood and sapwood) from the base material and the base material to be collected. Can do.

By combining the wood pieces 2 having different material characteristics in this way, the compressed wood processed product 1 has a varied appearance, and is a multifunctional member having a function corresponding to each material characteristic. Can do.
For example, it is possible to efficiently extend the life by placing a piece of wood 2 having high wear resistance, such as teak, at a site where wear is likely to occur.

Further, for example, the essential oil component of hinoki includes monoterpenes such as camphene and α-pinene, and sesquiterpenes such as casinol and hinokiol, and has antibacterial action due to the synergistic action of these terpenes. Therefore, it is known that bacterial growth, generation of mold, mites, etc. can be suppressed, and termites are not brought close to it. In addition, the essential oil component of Hiba contains thuopsen, sesquiterpene, hinokitiol, β-drabrin, and the like, and among them, hinokitiol and β-drabrin provide strong antibacterial properties. It also has an insect repellent effect against termites and mosquitoes.
Although these timbers are relatively expensive, the compressed wood processed product 1 can be provided with an antibacterial action and an insect proofing action at a relatively low cost by being mixed with a part of the wood pieces 2.

The manufacturing method of the compressed wood processed product 1 of this embodiment is demonstrated.
FIG. 2 is an explanatory perspective view for explaining a laminated material that also serves as a blank member for manufacturing a processed compressed wood product according to the first embodiment of the present invention. FIG. 3 is a perspective explanatory view for explaining an example of a piece of wood constituting the laminated wood used in the compressed wood processed product according to the first embodiment of the present invention. 4 (a), 4 (b), and 4 (c) are along the line AA in FIG. 1 (a) for explaining the compression molding process of the compressed wood processed product according to the first embodiment of the present invention. It is process explanatory drawing of a cross section.

The manufacturing method of the compression molded wood 1 which concerns on this embodiment consists of a blank member formation process and a compression molding process at least.
The blank member forming step forms a three-dimensional shape using a relatively long laminated material formed by arranging a plurality of relatively short pieces of wood and joining them with an adhesive that softens in a high-temperature steam atmosphere. It is a step of forming a blank member for performing compression molding.
In the present embodiment, a flat blank member 3 having a rectangular shape in plan view and having plate surfaces 3a and 3b in the thickness direction as shown in FIG. 2 is used as the blank member.
The blank member 3 is a flat plate with a short side × long side × height having a rectangular shape in plan view with W ₀ × L ₀ × t ₀ (W ₀ > W, L ₀ > L, t ₀ > t). A plurality of pieces of wood 2 sequentially joined by an adhesive layer P at the longitudinal ends thereof are oriented in the long side direction of the blank member 3 and arranged adjacent to each other in the short direction perpendicular to the longitudinal direction. In this state, the layers are joined by the adhesive layer P, and one layer is formed in the thickness direction.

As shown in FIG. 3, the shape of the wooden piece 2 before compression is the end in the longitudinal direction of a quadrangular prism having a rectangular cross section surrounded by side surfaces 2C, 2D, 2E, and 2F extended substantially in the wood fiber direction. It is made into the block shape which formed joint part 2A, 2B in the part. Opposite sides 2C, distances 2E coincides with the thickness _{t 0.}
The wood grain pattern M exposed on each side surface changes depending on the cutting position and cutting direction of the base material with respect to the annual ring when cutting the wood piece 2.
Therefore, by changing the cutting position and cutting direction from these base materials, it is possible to expose the wood grain pattern M composed of wood grain lines of various shapes.
For example, as shown in FIGS. 1 and 2, a grain pattern M such as a substantially parallel line shape, a U shape, or a concentric ellipse shape is obtained.

The joint portion 2A (2B) can employ a finger joint. In the present embodiment, the sawtooth cross section is formed of a finger joint that extends in the thickness direction from the side surface 2C toward the opposite side surface 2E, and is formed by combining a plurality of inclined surfaces to form a peak portion and a valley portion.
And joint part 2A (2B) fits with joint part 2B (2A) of the other wood piece 2 (refer the dashed-two dotted line of FIG. 3), and in that state, side surface 2C, 2D, 2E of each wood piece 2 2F can form the square column which each aligned.
Here, FIGS. 2 and 3 are schematic views, and the troughs and the peaks are simplified as acute triangles. However, in order to prevent chipping at the tip, appropriate roundness may be provided. Needless to say, it is good.

According to such joint portions 2A and 2B, when fitted, the sawtooth portions are alternately overlapped in the short direction of the wooden piece 2 from the side surface 2D toward the side surface 2F. The amount of overlap of the serrated portions and the number of overlaps are appropriately set according to the compression molding conditions.
Each piece of wood 2 can be freely moved in the thickness direction of the piece of wood 2 while maintaining the fitted state, as indicated by a single arrow in FIG. Therefore, even if the blank member 3 is formed, if the adhesive layer P softens, it can move in the plate thickness direction.
Further, the serrated boundary line formed when the joint portions 2A and 2B are fitted is exposed to the plate surfaces 3a and 3b of the blank member 3 to form a part of the boundary line Q.

The blank member 3 assembles such pieces of wood 2... In the longitudinal direction in a state where the adhesive layers P are provided on the joint portions 2A and 2B to form a long rectangular column, and one short column of each square column is formed. The side surface 2D (2F) in the hand direction is adjacent to the side surface 2F (2D) of the other quadrangular prism, and the adhesive layer P is provided to be bonded and solidified. By side 2C of each piece of wood 2, 2E is aligned to one plane each, and has a flat plate having a thickness of t ₀ with the plate surface 3a, and 3b.
At this time, in particular, when it is necessary to designate the location of the wood pieces 2 having different types and characteristics of wood, the specific wood pieces 2 are placed at specific positions. If the wood grain pattern M, color, etc. are different, they are arranged in consideration of the desired appearance design.
Then, if necessary, the size of the short side and the long side is shaped to the above size by cutting or cutting the outer shape.

The adhesive used for the adhesive layer P is an adhesive for wood that has the property of being solidified at room temperature and being softened in a high-temperature steam atmosphere in a compression molding process described later. That is, an adhesive that softens to a viscosity that can be relatively moved together with the wooden piece 2 fixed through the adhesive layer P by a high-temperature atmosphere of 120 ° C. or more and 200 ° C. or less or water vapor at that temperature is adopted.
For example, a vinyl acetate resin emulsion adhesive can be suitably employed as the adhesive that softens at high temperatures. However, the vinyl acetate resin itself is a thermoplastic resin, and the adhesive strength of this adhesive also decreases at around 40 ° C. Therefore, the addition of isocyanate or metal salt does not interfere with the use at around room temperature. A slight increase is preferred. In addition to this, a synthetic rubber-based adhesive having a property of being cured by the release of moisture can be suitably employed.

In the blank member forming step, the blank member 3 may be formed by performing all the steps including the production of the wood piece 2 described above, but the steps may be omitted as necessary. For example, the blank member 3 may be formed by shaping or cutting the outer shape if a laminated material that meets the above-described materials and arrangement conditions can be obtained. Further, for example, the blank member 3 may be formed by slicing a laminated material having a cross section similar to the shape in plan view of FIG. 2 and having a thickness greater than t ₀ to a thickness t ₀ . If it does in this way, manufacturing efficiency can be improved more.

  In the last example, the piece of wood 2 constituting the laminated material forming the blank member 3 is a member in which the plan view shape of FIG. 3 is extended in the thickness direction, and is more than the distance between the end portions of the joint portions 2A and 2B. The distance between the side surfaces 2C and 2E in the thickness direction is longer. However, regarding the outer shape of the piece 2 exposed on the plate surfaces 3a and 3b that are the surfaces against which the mold is pressed in the blank member 3, the distance between the end portions of the joint portions 2A and 2B is the distance between the side surfaces 2C and 2E. In this specification, the terms “longitudinal direction” and “short direction” are used to mean the outer shape of the piece of wood 2 in the blank member 3 as described above.

Next, the compression molding process of this embodiment will be described.
In the compression molding process, as shown in FIG. 4A, the blank member 3 is compression-molded by using an upper mold 5A (mold) and a lower mold 5B (mold), so that the three-dimensional surface of the mold is obtained. It is a step of forming the compressed wood processed product 1 by transferring the shape to the blank member 3.
The upper mold 5A is a core mold that forms the inner surface of the compressed wood processed product 1, and includes a bottom mold surface 5a and a side mold surface 5b corresponding to the shape of the inner surface of the bottom 1a and the side 1b. . Although not shown, the side mold surface corresponding to the inner surface side shape of the side portion 1c is naturally provided.
The lower mold 5B is a cavity mold that forms an outer surface of the compressed wood processed product 1, and includes a bottom mold surface 5c and a side mold surface 5d corresponding to the outer surface side shape of the bottom 1a and the side 1b. . Moreover, although not shown in figure, naturally the side part mold surface corresponding to the outer surface side shape of the side part 1c is also provided.

First, as shown in FIG. 4A, the blank member 3 is set between the upper mold 5A and the lower mold 5B.
Then, the upper mold 5A and the lower mold 5B are slid relative to each other in the illustrated vertical direction, and the blank member 3 is compressed in the vertical direction.
At this time, in order to soften the blank member 3, compression is performed in a state where the blank member 3 is placed in a high-temperature steam atmosphere, for example, by spraying high-temperature high-pressure steam. For example, the compression is performed while jetting high-temperature and high-pressure steam at about 120 ° C. to 200 ° C., preferably about 180 ° C. to 200 ° C.
Under such a high-temperature steam atmosphere, the wood fibers of the wood piece 2 are softened and the adhesive of the adhesive layer P is softened.

Therefore, when compression is started, the wooden piece 2 is softened, and thus deforms in accordance with the mold surface. In addition, since the adhesive layer P is also softened and is in a fluid state in some cases, the bonding force between the adjacent pieces of wood 2 is reduced, and relative movement in various directions is possible. As a result, the rigidity of the blank member 3 is significantly lower than that of a single plate member made of the same material, and the blank member 3 is relatively easily compressed and deformed in a state of being pressed against the mold surface having a three-dimensional shape and closely contacting with no gap. The
Then, the upper die 5A until the plate thickness becomes from t ₀ to t, stop the slide moves from the by relatively sliding the lower die 5B.

  In this step, it is preferable that the upper mold 5A and the lower mold 5B are also heated to the same temperature. Further, it is preferable that the upper mold 5A and the lower mold 5B are installed in a high-pressure vessel because compression can be performed more efficiently.

  In the present embodiment, the joint portions 2A and 2B are provided at the longitudinal ends of the wood pieces 2, and easily move in the thickness direction while keeping the ends of the wood pieces 2 adjacent to each other fitted together. it can. Moreover, even if it moves to some extent in the direction away from the longitudinal direction, each peak and valley overlap each other in the short direction. For this reason, even if the adjacent pieces of wood 2 are relatively moved in a direction away from each other in the thickness direction and the longitudinal direction, the joint portions 2A and 2B maintain the overlapping state via the adhesive layer P and are compressed in that state. It will be done. In other words, the joint portions 2A and 2B through the softened adhesive layer P enable elongation deformation, rotational deformation, and shear deformation in the thickness direction without applying a load to the wood piece 2.

Further, since the softened adhesive layer P is deformed, the adjacent pieces of wood 2 move relative to each other or relieve stress, so that the shearing force and tensile force acting on the piece of wood 2 are reduced. As a result, it is possible to prevent the wood piece 2 from being cracked or broken and to perform smooth compression molding.
The wood fiber hardly stretches even when it receives a tensile force in the fiber direction, and the wood fiber breaks when it receives a tensile force that exceeds the allowable limit, but as in this embodiment, the end coincides with the wood fiber direction. If the joint portions 2A and 2B are provided on the side, the joint portions 2A and 2B that fit together when receiving a tensile force exceeding the allowable range slide to each other via the softened adhesive layer P and move in the longitudinal direction. , Absorb the amount of elongation. Therefore, the elongation amount can be absorbed without the wood fiber receiving a tensile force, so that the breakage of the wood fiber can be prevented.

  In addition, when adjacent joint part 2A, 2B moves to the direction separated in a longitudinal direction by tensile force, since this tensile force arises with compression, unless it deform | transforms exceeding the overlap amount of joint part 2A, 2B, There is no hole in the compressed wood processed product 1. For example, when the joint portions 2A and 2B are separated from each other, even if a gap is generated between the peaks and valleys, the gap is crushed by the compressive force from other directions. Even if the gap is not crushed due to the compression direction, the softened adhesive of the adhesive layer P moves and fills the gap.

After completion of the slide movement of the mold, the mold clamping is held until the shape of the mold surface is transferred and fixed (see FIG. 4B). The mold clamping is maintained for a predetermined time, and the mold is removed after drying the moisture.
After removal from the mold, the shape of the opening end portion 1e is finished by removing the removal portion 6 that corresponds to the end portion of the side portion, for example, as necessary (two-dot chain line portion in FIG. 4C). Thus, the compressed wood processed product 1 can be manufactured.

According to such a compressed wood processed product 1, since a plurality of wood pieces 2 each having a different wood grain pattern exposed on the surface are joined, it is possible to provide a wood grain pattern rich in change even if it is small.
Moreover, the blank member 3 is formed with the laminated material joined by the adhesive layer P in which the wooden piece 2 is softened in a high-temperature steam atmosphere in the longitudinal direction and the short direction, and the blank member 3 is formed as an upper mold 5A and a lower mold 5B. Since the wood piece 2 and the adhesive layer P are respectively softened, the rigidity of the blank member 3 is reduced and the separation between the wood pieces 2 hardly occurs even if the wood piece 2 is stretched. And formability is improved. Therefore, the load applied to each piece of wood 2 is reduced as compared with the case where a single plate member is molded into a three-dimensional shape, so that the pattern by the boundary line and the grain line 20 is good without being cracked or torn. There is an advantage that it is molded in a state.

Next, a modification of this embodiment will be described.
FIG. 5 is a perspective partial cross-sectional view for explaining a modified example of the laminated lumber that can be used for the compressed wood processed product according to the first embodiment of the present invention. FIG. 6 is a schematic explanatory view for explaining another modified example of the joint part of the piece of wood that can be used for the compressed wood processed product according to the first embodiment of the present invention.

The modification of the laminated material of this embodiment uses the laminated material 60 instead of the blank member 3 of the said embodiment.
As shown in FIG. 5, the laminated material 60 is obtained by closely joining the square columns joined in the longitudinal direction by the joint portions 2 </ b> A and 2 </ b> B between the side surfaces 2 </ b> C and 2 </ b> E, so that the plate surfaces 60 a and 60 b are Each side piece 2D and 2F of each wood piece 2 consists of the laminated material formed in order.
Therefore, each piece of wood 2 is easy to move in the facing direction of the side surfaces 2C and 2E while maintaining the fitted state.
Further, each piece of wood 2 is easy to move in the direction in which the quadrangular column extends, and the sawtooth portions of the joint portions 2A and 2B overlap each other in the plate thickness direction of the laminated material 60 when moving.
Further, linear boundary lines formed by fitting the joint portions 2A and 2B are exposed on the plate surfaces 60a and 60b.
In this modification, the side surface 2D opposite piece of wood 2, the distance of 2F is coincident with the thickness t ₀ of the laminated wood 60.

According to this modified example, when the laminated material 60 is compressed in the thickness direction, the joint portions 2A and 2B are compressed in the direction in which they are overlapped with each other, so that the joining strength of each piece of wood 2 after compression is increased.
Moreover, even if it receives the tensile force along a metal mold | die surface with compression, in the range in which joint part 2A, 2B was formed, since each piece of wood 2 can move to a longitudinal direction and can absorb elongation amount, wood fiber It is difficult to break. Further, since the wood pattern of the sawtooth portion is not exposed on the plate surfaces 60a and 60b, a wood grain pattern in which the wood grain line originally possessed by the wood piece 2 is utilized even after compression is obtained.

As another modified example of the present embodiment, a finger joint other than the sawtooth cross section or a joint part other than the finger joint may be employed as the joint part instead of the joint parts 2A and 2B.
Hereinafter, other modified examples thereof will be briefly described. These can be appropriately selected in consideration of the joint strength of the joint portion, workability, the pattern formed by the boundary line when exposed to the plate surface, and the like.

FIG. 6A shows a finger joint provided with joint portions 20A and 20B having a sinusoidal or U-shaped cross section at the end of a piece of wood 2 instead of a sawtooth cross section. In this case, the strength of the tip can be improved compared to the sawtooth cross section.
FIG. 6B shows a finger joint provided with joint portions 21 </ b> A and 21 </ b> B having a rectangular wave-like cross section at the end portion of the wooden piece 2 instead of the sawtooth cross section. In this case, processing becomes easier as compared to the sawtooth cross section.

Moreover, the joint part may be formed by uneven | corrugated shape other than a finger joint. For example, all combinations of a pair of convex portions and concave portions such as finger joints 2A, 2B, 20A, 20B, 21A, and 21B can be suitably employed. In addition, the following examples can be given.
FIG. 6C shows a concave joint portion 22A having a stepped cross section that is substantially V-shaped, and a convex joint portion 22B that fits into the concave joint portion 22A.
FIG. 6 (d) shows a joint portion 23A having a V-shaped concave cross section and a joint portion 23B having a convex cross section fitted to the joint portion 23A.
FIG. 6E shows a concave joint portion 24A having a substantially semicircular fitting portion and a convex joint portion 24B fitted thereto.

Moreover, an inclined surface may be formed in the edge part of the wooden piece 2, and the joint part which mutually overlaps along a longitudinal direction may be formed.
For example, as shown in FIG. 6 (f), joint portions 25A and 25B made of inclined surfaces inclined at the same angle in the opposite direction at the end portions in the longitudinal direction can be employed.
In addition, as shown in FIG. 6 (g), two abutting planes having a step extending in a direction orthogonal to the longitudinal direction are provided, and joint portions 26A and 26B having a cross-sectional shape provided with an inclined surface therebetween are employed. can do.

  In addition, when the tensile force is small and the bonded state can be maintained by the adhesive layer P due to the compression rate, the compression direction, the shape of the mold surface, etc., as shown in FIG. It is good also considering the joint part 27A, 27B which consists of a plane orthogonal to a longitudinal direction as the edge part of this longitudinal direction. In this case, since the piece of wood 2 is a rectangular parallelepiped block, there is an advantage that manufacture is easy.

[Second Embodiment]
A compressed wood processed product according to the second embodiment of the present invention will be described.
Fig.7 (a) is a perspective explanatory view for demonstrating schematic structure of the compressed wood processed goods which concerns on the 2nd Embodiment of this invention. FIG.7 (b) is CC sectional drawing of Fig.7 (a).

  The compressed wood processed product 10 of this embodiment is arranged by combining the pieces of wood 2... (Including the pieces of wood 2a and 2b) in a parquet shape like the compressed wood processed product 1 of the first embodiment, and the height is h. This is a box-shaped member having substantially the same shape. That is, as shown to Fig.7 (a), (b), it replaces with the bottom part 1a, the side parts 1b and 1b, the side parts 1c and 1c, the opening part 1d, and the opening edge part 1e of the compressed-wood processed goods 1, 10a, side portions 10b and 10b, side portions 10c and 10c, an opening portion 10d, and an opening end portion 10e. Here, the side portion 10b is different from the side portion 1b in that both the outer surface side and the inner surface side are cut by a plane where the piece of wood 2 intersects in the longitudinal direction, for example, concentric circular rings are compressed concentrically in the radial direction. The grain pattern N having a pattern different from the grain pattern M is exposed on the surface due to the closed curve-shaped grain line 20 or the like.

The manufacturing method of the compressed wood processed product 10 of this embodiment is demonstrated centering on a different point from 1st Embodiment.
FIG. 8: is a perspective explanatory view for demonstrating the laminated material for forming the blank member for manufacturing the compressed wood processed goods which concerns on the 2nd Embodiment of this invention. FIGS. 9A, 9B, and 9C are taken along line CC in FIG. 7A for explaining each manufacturing process of the compressed wood processed product according to the second embodiment of the present invention. It is process explanatory drawing of a cross section.

The method for manufacturing the compressed wood processed product 10 according to the present embodiment includes a blank member forming process different from the first embodiment and a compression molding process substantially similar to the first embodiment.
The blank member forming step of the present embodiment is a three-dimensional process using a relatively long laminated material formed by joining a plurality of relatively short pieces of wood and joining them with an adhesive that softens in a high-temperature steam atmosphere. It is a step of forming a blank member for performing compression molding to form a shape. However, unlike the first embodiment, in this embodiment, the blank member has a shape substantially in line with the outer shape of the compressed wood processed product 10 and is thicker than the compressed wood processed product 10 in order to provide a compression allowance. Forms having a dimensional shape.

Therefore, as shown in FIG. 8, the laminated material 7 larger than the shape of the compressed wood processed product 10, for example, short side × long side × height is W ₁ × L ₁ × t ₁ (W ₁ > A rectangular parallelepiped block member of W, L ₁ > L, t ₁ > h) is used. As such a laminated material, a _single layer of laminated material in which the thickness t ₀ of the blank member 3 is replaced with t ₁ (> t ₀ ) may be used. However, in this embodiment, as shown in FIG. A description will be given of an example of the laminated material 7 in which the same laminated material as that of the member 3 is stacked in multiple layers (for example, three layers) and closely bonded via the adhesive layer P.
The plate surfaces 7a and 7b of the laminated material 7 are planes in which the side surfaces 2C and 2E of the piece of wood 2 are aligned in the same manner as the plate surfaces 3a and 3b of the blank member 3, respectively.

  The manufacturing method of the laminated material 7 can be performed similarly to 1st Embodiment. That is, it may be manufactured from the piece of wood 2 or, if there is a laminated board or block material in which the combination of the pieces of wood 2 meets the desired conditions, it is cut and bonded to the above-mentioned size It may be formed.

As the blank member, the laminated material 7 is cut to form a three-dimensional blank member 30 as shown in FIG.
The three-dimensional blank member 30 has, for example, a blank side portion inner surface 30d having a shape substantially conforming to the inner surface shape corresponding to the side portion 10b, the bottom portion 10a, and the side portion 10b in the cross section along the line CC in FIG. The blank bottom inner surface 30a and the blank side inner surface 30d are cut, and the blank side outer surface 30e, the blank bottom outer surface 30b, and the blank side outer surface 30e having a shape substantially along the outer surface shape are cut, and the three-dimensional blank member 30 is cut. The side part and the bottom part are formed to be thicker than the plate thickness t.
For example, the thickness of the bottom is T (where t ₁ >T> t). The thickness of the side portion is gradually changed from T toward the tip portion to a thickness smaller than T and slightly larger than t. The same applies to the side portion of the three-dimensional blank member 30 corresponding to the side portion 10c (not shown).

  By cutting in this way, the blank side portion inner surface 30d and the blank side portion outer surface 30e corresponding to the side portion 10b are cut so that the wood piece 2 intersects in the longitudinal direction. For example, the closed curve group of concentric annual rings is a tree. It is exposed as a line of sight 20.

Next, the compression molding process of this embodiment will be described.
The compression molding process according to the present embodiment is obtained by replacing the blank member 3 with the three-dimensional blank member 30 in the compression molding process of the first embodiment. However, the bottom mold surface 5a, the side mold surface 5b, the bottom mold surface 5c, the side mold surface 5d, etc., which are the mold surfaces of the upper mold 5A and the lower mold 5B, are processed with the compressed wood processed product 10. A three-dimensional shape corresponding to the shape of the inner surface and the outer surface of the bottom portion 10a, the side portion 10b, and the like.

First, as shown in FIG. 9A, the three-dimensional blank member 30 is set between the upper mold 5A and the lower mold 5B.
Then, the upper mold 5A and the lower mold 5B are slid in the vertical direction in the drawing, and the three-dimensional blank member 30 is compressed in the vertical direction in the same manner as in the first embodiment, and the shape of the mold surface is transferred and fixed. The mold clamping is held until it is done (see FIG. 9B), and the mold clamping is held for a predetermined time as it is to dry the moisture (see FIG. 9C).
After demolding, the end of the side is removed as necessary to finish the shape of the open end 10e.
In this way, the compressed wood processed product 10 can be manufactured.

According to such a manufacturing method, since the three-dimensional blank member 30 processed into a shape substantially along the mold surface is used, even if the three-dimensional blank member 30 has a complicated three-dimensional shape with a large unevenness difference, It will not be pulled excessively by the mold. Therefore, highly accurate and easy compression molding can be performed.
In addition, when the compression molding is performed, the adhesive layer P is softened and the respective pieces of wood 2 are relatively moved relatively, so that the moldability can be further improved as compared with the three-dimensional blank member cut from the bulk material.

Moreover, since the laminated wood 7 has various wood pieces 2 bonded and bonded in multiple layers, mechanical properties such as warpage characteristics and strength become an averaged material, so there is a bias in warpage characteristics and strength. Compared with the bulk material, the processing accuracy in the case of cutting the three-dimensional blank member 30 can be improved.
Further, since the laminated material 7 is cut to form the three-dimensional blank member 30, the piece of wood 2 is cut according to the cutting shape, and a very varied wood grain pattern N is formed. Therefore, the compressed wood processed product 10 having an excellent appearance can be manufactured.
Further, the wood piece 2 in the region to be cut in the laminated material 7 has an advantage that the manufacturing cost can be reduced when inexpensive wood or wood that can be easily cut is used.

[Third Embodiment]
A compressed wood processed product according to the third embodiment of the present invention will be described.
FIG. 10A is a perspective explanatory view for explaining a schematic configuration of a compressed wood processed product according to the third embodiment of the present invention. FIG.10 (b) is DD sectional drawing of Fig.10 (a).

The compressed wood processed product 11 of the present embodiment is arranged by combining wood pieces 2 (including the wood pieces 2a and 2b) in a parquet-like manner in the same manner as the compressed wood processed product 1 of the first embodiment, and the height is H The box-shaped member having substantially the same shape as described above, and manufactured by a manufacturing method obtained by modifying the manufacturing method of the compressed wood processed product of the second embodiment.
That is, as shown in FIGS. 10 (a) and 10 (b), the shape of the compressed wood processed product 11 is such that the bottom 1a, the side portions 1b and 1b, the side portions 1c and 1c, the opening 1d, Instead of the opening end 1e, a bottom portion 11a, side portions 11b and 11b, side portions 11c and 11c, an opening portion 11d, and an opening end portion 11e are provided.
Different types of wood grain patterns are formed on the outer surface side of the compressed wood processed product 11 and the inner surface side of the side portion 11b. That is, the grain pattern M having the same configuration as that of the compressed wood processed product 1 is exposed on the outer surface side of the compressed wood processed product 11. On the other hand, the wood grain pattern N by the wood grain line 20 which cut | disconnected the wood piece 2 in the longitudinal direction is exposed as the wood grain pattern of the inner surface side.
For example, as shown in FIG. 10 (a), on the side portion 11b, the molding surface on which the side surface 2C of the piece of wood 2 is exposed corresponding to the plate surface 7a of the laminated material 7 on the outer surface side, like the side portion 1b. In this embodiment, the wood fiber forms a substantially continuous molding surface. On the other hand, wood fibers are cut on the inner surface side, and annual rings as shown by the grain line 20 appear.

The manufacturing method of the compressed wood processed product 11 of this embodiment will be described focusing on differences from the second embodiment.
11 (a), 11 (b), 12 (c), and 12 (d) are diagrams for explaining each manufacturing process of a three-dimensional blank member used for a compressed wood processed product according to the third embodiment of the present invention. It is process explanatory drawing of the cross section which follows the DD line | wire of Fig.10 (a).
Although the manufacturing method of this embodiment forms a three-dimensional blank member from the block-like laminated material 7 similarly to 2nd Embodiment, unlike the manufacturing method of 2nd Embodiment, a blank member formation process is, It consists of a primary compression process and a secondary processing process.

The primary compression step is a step of forming the primary compression member by compression-molding the laminated material 7 that has been compression-molded and formed into a block shape with a mold that forms part of the shape of the blank member.
As the mold used in this step, for example, as shown in FIG. 11A, an upper mold 15A and a lower mold 15B can be used.
The upper mold 15A has a pressing surface 15a made of a flat surface.
The lower mold 15B includes a bottom mold surface 15c, side mold surfaces 15d, 15d, and the like that form a three-dimensional shape that substantially conforms to the shape on the outer surface side of the compressed wood processed product 11. The side mold surface 15d is provided so as to protrude from the bottom mold surface 15c. Note that a side mold surface that forms a three-dimensional shape that substantially follows the shape of the side portion 11c is naturally provided in the depth direction of the drawing (not shown).
The upper mold 15A and the lower mold 15B can be slid relative to each other in the vertical direction in the figure.

In the primary compression step, as shown in FIG. 11A, the laminated material 7 is set between the upper mold 15A and the lower mold 15B. Then, the upper die 15A, and slide the lower die 15B in the vertical direction in the figure, the thickness _{t 1} of the laminated wood 7 in the vertical direction to the thickness _{t 2} (provided _{that, t} 2> H) compresses until.
Here, it is the same as in the first and second embodiments that the laminated material 7 is compressed while being softened by high-temperature and high-pressure steam.

At this time, since the laminated material 7 is compressed by the side mold surface 15d protruding from the bottom mold surface 15c, the three-dimensional shape is formed with the side mold surfaces 15d and 15d biting into the laminated material 7. It is formed and the compression rate in the vicinity is high. On the other hand, the laminated material 7 in contact with the pressing surface 15a side is uniformly compressed.
Therefore, as shown in FIG. 11B, a relatively high compression portion 31A is formed in the vicinity of the side mold surface 15d, and the other portions have a higher average density than the laminated material 7 and the high compression portion 31A. It is formed in the relatively low compression portion 31B having a smaller average density. Then, a blank lower surface 31b and a blank side surface 31e to which the three-dimensional shapes of the mold surfaces such as the bottom mold surface 15c and the side mold surface 15d of the lower mold 15B are transferred are formed.
Further, on the upper surface side of the laminated material 7, it is difficult for the wood to be deformed in the direction along the pressing surface 15 a due to the influence of the side mold surface 15 d, so that the contact surface with the pressing surface 15 a It is deformed into a shape that is recessed or wrinkled.
Here, by setting the thickness t ₂ properly, it is possible to control the space distribution and size of the average density of the high compression portion 31A and the low compression portion 31B.

Then, the mold clamping is held until the shape of the mold surface of the lower mold 15B is transferred and fixed (see FIG. 11B), and the mold clamping is held for a predetermined time to dry the moisture. To remove the primary compression blank 31 (primary compression member) (see FIG. 12C).
This completes the primary compression process.

The secondary processing step is a step of cutting the primary compression blank 31 to form a three-dimensional blank member 32 (see FIG. 12D).
In this step, the blank lower surface 31b, the blank side surface 31e, etc. are left and cut from the blank upper surface 31a side to have a three-dimensional shape substantially following the three-dimensional shape of the bottom mold surface 5a and the side mold surface 5b. Cutting surfaces 32a and 32d are formed. In the present embodiment, the cutting surface 32a is a surface substantially along the wood fiber direction and the cutting surface 32d is a surface mainly intersecting the wood fiber direction from the arrangement direction of the wood pieces 2 in the laminated material 7. Therefore, different types of wood grain patterns are exposed at the cutting surface 32a and the cutting surface 32d.

Thus, in the manufacturing method of this embodiment, since the surface of the three-dimensional blank member 32 is comprised by the surface by compression molding and the surface by cutting, the grain pattern according to each is formed.
And the compressed-wood processed goods 11 can be manufactured by performing the compression molding process similarly to 2nd Embodiment using the three-dimensional blank member 32. FIG.

Moreover, according to the manufacturing method of this embodiment, since the compression allowance in the compression molding process can be varied by varying the shapes of the cutting surfaces 32a, 32d and the like in the secondary machining process, The average density can be easily controlled.
For example, by reducing the remaining thickness in the vicinity of the high compression portion 31A and increasing the remaining thickness in the low compression portion 31B, the average density can be equalized even in the compression molding of a three-dimensional shape. Is possible. Further, by cutting into a shape in which the average density of a specific part increases, durability can be improved even when a large external force is applied to the specific part.

In the above description, a box-shaped member having a rectangular shape in plan view and opened in one side has been described as an example of a compressed wood processed product. However, the present invention can be applied to a shape that is compression-molded into a three-dimensional shape. It is not limited to a box-shaped member. For example, it may be a member having various planar shapes, curved surfaces having complicated irregularities, openings, and the like.
And when using a three-dimensional blank member as a blank member, the shape of a three-dimensional blank member can also be employ | adopted for the shape of a compressed wood processed goods, and the appropriate three-dimensional shape which provided the required compression allowance can be employ | adopted. .

In the above description, the laminated member forming the blank member has been described as an example of the case of a plate member and the case of a block member in which the plate member is bonded in multiple layers. By appropriately setting the shape and arrangement, a three-dimensional laminated material having irregularities may be used.
In particular, when a three-dimensional blank member is formed as in the second embodiment, it is preferable to form a three-dimensional shape slightly larger than the outer shape of the three-dimensional blank member.
FIG. 13 is an explanatory perspective view for explaining an example of a laminated material having a three-dimensional shape that can be employed in the second embodiment.

The laminated material 8 shown in FIG. 13 has a bottom surface portion 8a having the same configuration as that of the blank member 3 having a long side L ₁ × short side W ₁ × thickness T and a plurality of pieces of wood 2 on the outer periphery thereof. These are box-shaped members opened up in the figure, in which side portions 8c, 8c, 8b, 8b having a thickness T, which are closely bonded, are erected and are closely bonded via an adhesive layer P.
According to such a laminated material 8, the three-dimensional blank member 30 of the second embodiment can be formed with a smaller cutting amount than in the second embodiment.
Therefore, compared with the case where the three-dimensional blank member 30 is processed from the laminated material 7, there is an advantage that processing can be performed quickly and material loss can be reduced.
If possible, the compression molding process may be performed using the laminated material 8 as a three-dimensional blank member.

  In the description of the third embodiment, the side of the piece 2 or the surface formed along the wood fiber is exposed on the outer surface side of the compressed wood processed product, and the wood fiber is crossed on the inner surface side of the side portion. Although the example which exposes the torn surface to expose was demonstrated, if the shape of 5 A of upper molds and the lower mold 5B is changed, it will be easy to expose each on the surface on the opposite side.

  In the description of the second embodiment, the case where the blank bottom portion of the three-dimensional blank member is extended in the direction along the wood fiber direction of the laminated lumber has been described as an example. Can be cut out in any direction. Thereby, on the three-dimensional blank member, the cutting angle with respect to the wood fiber direction can be varied, and a more varied wood grain pattern can be formed.

In the description of the third embodiment, the molding surface to be left on the three-dimensional blank member is formed by only one mold. However, the molding surface on the secondary processing side of the primary compression member. May be used as a surface constituting the three-dimensional blank member.
In this case, since the amount of cutting in the secondary processing step can be reduced, there is an advantage that it can be efficiently manufactured.

In the above description, an example in which the longitudinal direction of a piece of wood substantially coincides with the wood fiber direction has been described. In this way, processing from thinned wood becomes easy and there is an advantage that the wood fiber is continuous over the entire length of the rod-shaped piece of wood so that the strength can be improved, but if sufficient strength is obtained, You may use what the longitudinal direction of a rod-shaped piece of wood cross | intersects the direction of a wood fiber, and wood fiber does not continue over the full length within a wood piece.
In this case, the grain pattern appearing on the surface of the piece of wood becomes more varied, so that there is an advantage that a more varied grain pattern can be exposed.

  In the above description, the example in which the joint portion is formed at the end portion in the longitudinal direction as a plurality of wood pieces to form the laminated material, but the position where the joint portion is provided is not limited to the end portion in the longitudinal direction, You may provide in the side surface of a transversal direction.

In the above description, the plurality of pieces of wood have been described as examples of members having the same shape. However, a plurality of pieces of wood pieces may be combined as long as they can be closely joined in a parquet shape. For example, those having different lengths, those having different cross sections, and those having different joint shapes can be freely combined.
Further, the cross section of the piece of wood is not limited to a rectangular shape, and other polygonal shapes such as a triangular shape and a hexagonal shape can be employed.

  Further, in the above description, as an example of the case where the plate-like laminated material is bonded in multiple layers as the block-like laminated material, the plate-like laminated material has been described by, for example, combining the rectangular pillars as appropriate to repeat the uneven fitting. It is good also as a block-shaped laminated material of the structure which cannot be divided | segmented into a shaped laminated material.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective explanatory view for explaining a schematic configuration of a compressed wood processed product according to the first embodiment of the present invention and an AA sectional view thereof. It is a perspective view for demonstrating the laminated material which serves as the blank member for manufacturing the compressed wood processed goods which concerns on the 1st Embodiment of this invention. It is a perspective explanatory view for explaining one example of the piece of wood which constitutes the laminated wood used for the compressed wood processed product according to the first embodiment of the present invention. It is process explanatory drawing of the cross section along the AA of FIG. 1 (a) for demonstrating the compression molding process of the compressed wood processed goods which concerns on the 1st Embodiment of this invention. It is a perspective fragmentary sectional view for demonstrating the modification of the laminated material which can be used for the compressed wood processed goods which concerns on the 1st Embodiment of this invention. It is a schematic explanatory drawing for demonstrating the other modification of the joint part of the piece of wood which can be used for the compressed wood processed goods which concerns on the 1st Embodiment of this invention. It is the isometric view explanatory drawing for demonstrating schematic structure of the compressed wood processed goods which concerns on the 2nd Embodiment of this invention, and its CC sectional drawing. It is an isometric view explanatory drawing for demonstrating the laminated material for forming the blank member for manufacturing the compressed wood processed goods which concerns on the 2nd Embodiment of this invention. It is process explanatory drawing of the cross section in alignment with CC line of Fig.7 (a) for demonstrating each manufacturing process of the compressed wood processed goods which concerns on the 2nd Embodiment of this invention. It is the isometric view explanatory drawing for demonstrating schematic structure of the compressed wood processed goods which concerns on the 3rd Embodiment of this invention, and its DD sectional drawing. It is process explanatory drawing of the cross section along the DD line | wire of FIG. 10 (a) for demonstrating each manufacturing process of the three-dimensional blank member used for the compressed wood processed goods which concerns on the 3rd Embodiment of this invention. It is process explanatory drawing explaining each manufacturing process similarly following FIG. It is an isometric view explanatory drawing for demonstrating an example of the laminated material which has a three-dimensional shape which can be employ | adopted for the 2nd Embodiment of this invention.

Explanation of symbols

1, 10, 11 Compressed wood processed product 2, 2a, 2b Wood piece 3, 60 Blank member (glued wood)
5A Upper mold (mold)
5B Lower mold (mold)
7, 8 Glued material 15A Upper mold 15B Lower mold 20 Grain line 30, 32 Three-dimensional blank member 31 Primary compression blank (primary compression member)
31A High compression part 31B Low compression part

Claims (10)

A method of manufacturing a compressed wood processed product in which wood is compression-molded with a mold to form a three-dimensional shape,
A blank member for compression molding is formed using a laminated material formed by relatively arranging a plurality of relatively short pieces of wood as a piece of wood and joining them with an adhesive that softens in a high-temperature steam atmosphere. A blank member forming step to be formed;
A method for producing a processed compressed wood product, comprising: a compression molding step in which the blank member is compression-molded by the mold in a high-temperature steam atmosphere.   The said blank member formation process forms the said blank member as a plate member comprised from the said laminated material, The manufacturing method of the compressed wood processed goods of Claim 1 characterized by the above-mentioned.   In the blank member forming step, the blank member is cut from the laminated material to form a three-dimensional blank member having a three-dimensional shape that substantially conforms to the shape of the mold surface of the mold. The manufacturing method of the processed compressed wood product according to claim 1.   4. The method for manufacturing a compressed wood processed product according to claim 3, wherein the laminated material is formed in a three-dimensional shape slightly larger than the outer shape of the blank member. The blank member forming step,
A primary compression step of forming a primary compression member in which the laminated material is compression-molded to form a part of the shape of the blank member;
5. The method for manufacturing a compressed wood processed product according to claim 3, further comprising a secondary processing step of cutting the primary compression member to form another portion of the blank member.   The method for producing a processed compressed wood product according to any one of claims 1 to 5, wherein the plurality of pieces of wood are made of thinned wood.   The method of manufacturing a compressed wood processed product according to any one of claims 1 to 6, wherein the plurality of pieces of wood are made of wood of a plurality of materials.   The method for producing a processed compressed wood product according to claim 1, wherein the plurality of pieces of wood are formed by combining woods having different average densities.   The method for producing a processed compressed wood product according to any one of claims 1 to 8, wherein finger joints are formed on a plurality of pieces of wood constituting the laminated material. A compressed wood processed product in which a three-dimensional shape is formed by compression molding wood with a mold,
On the surface of the processed product body, a plurality of pieces of wood joined together via an adhesive layer that softens in a high-temperature steam atmosphere is exposed,
The compressed wood processing characterized in that the plurality of pieces of wood exposed on the surface of the processed product body are joined in the longitudinal direction and the short direction of the outer shape of each piece of wood in a direction along the surface of the processed product body. Goods.

Images