JP3267961B2 - Wood composite material for building and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

TECHNICAL FIELD [0001] The present invention relates to a wood composite material for building, and more particularly, to a wood composite material for building manufactured by laminating a plurality of wood members and a method for manufacturing the same.

2. Description of the Related Art Conventionally, in a general building, various woods have been used as building materials. In many cases, solid wood is used as such a structural member. However, when solid wood is used as a structural member of a building, particularly a wooden building, various problems occur because the wood contains moisture. For example, in the case of undried wood, a beam of 30 cm to 36 cm may be used for drying the wood, and about 15 to
Shrinkage of 18 mm, that is, about 5% occurs. When undried wood is used for the structural member, various inconveniences such as inclination of the floor due to shrinkage of the wood and occurrence of rain leakage occur. In recent years, demands for wooden houses have been increasing, and it is necessary to avoid inconveniences such as the inclination of the floor surface due to the shrinkage of wood and the leak of rain as described above.

Conventionally, in order to cope with the problem of shrinkage of wood used as a structural member, wood that has been artificially dried, that is, an artificial drying material, has been used. Artificial desiccants with a wood moisture content of about 15% are commonly distributed for reasons such as high drying costs, still large shrinkage, cut-offs and numerous dry cracks. It is not the situation that there is.

[0004] In order to compensate for the inconvenience of the artificial drying material described above, a laminated material formed by laminating a plurality of wooden boards has been proposed. Although this laminated wood has the advantage that it is possible to reduce the shrinkage due to drying and obtain the necessary structural strength by laminating a plurality of thin wooden boards that can be dried more easily. However, the price is high compared to undried wood and is not in a situation where it is commonly used. In this conventional laminated wood, a finger joint is formed at the end where the longitudinal joint lamina faces. The finger joints at the ends of the opposing glued lumber are fitted to each other and are formed by being bonded to each other with an adhesive or the like. Such a laminated wood must be subjected to processing for forming a finger joint one by one with respect to the longitudinal joint lamina for forming the laminated wood,
The working cost is high due to the processing time, the labor cost required for the processing, and the like, and the availability of the laminated wood is limited.

In view of the above, Japanese Unexamined Patent Publication (Kokai) No. 8-187706 discloses a laminated material which has sufficient strength and can be manufactured at low cost. JP-A-8-18
Although the strength and manufacturing cost of the laminated timber disclosed in Japanese Patent No. 7706 are certainly improved, it is not intended to shrink the laminated timber, and the disclosed laminated timber is:
It does not use outer lamina having a water content of 19% or less.

Japanese Unexamined Patent Publication No. 9-174518 discloses a laminated material manufactured only from a laminated veneer lumber (LVL) joined to each other by a finger joint. Although the joints of the laminated wood are formed so as to be separated from each other in the longitudinal direction, this laminated wood is composed only of plywood, and uses outer lamina and end lamina having a water content of 19% or less. Is not disclosed at all, and it is difficult to effectively use the longitudinal ends of the laminated wood.

Further, in order to respond to the revision of the Building Standard Law in order to promote the quality assurance of wooden buildings, it is necessary to display performance and guarantee defects, and furthermore, the use of artificially dried wood and laminated wood It is anticipated that the ratio will increase, and it is therefore strongly desired to provide a high-quality and inexpensive wooden composite material for construction.

DISCLOSURE OF THE INVENTION Accordingly, it is an object of the present invention to provide a wooden composite material for building and a method of manufacturing the same, which can be manufactured more easily than conventional laminated timbers, and which can utilize wood more effectively. Is to provide.

Still another object of the present invention is to provide a wooden composite material for buildings having sufficient strength and sufficient dimensional stability, and a method for producing the same.

Still another object of the present invention is to provide a low-cost architectural wood composite and a method for producing the same.

The above objects of the present invention are attained by providing a wooden composite material for buildings of the present invention and a method for producing the same.

That is, according to the first aspect of the present invention, a woody outer lamina having a water content of 19% or less, plywood for a softwood structure, OSB, MDF, PSL, LVL, OSL,
A plurality of plate members selected from Lauan are laminated, and the inner layer lamina, which is shorter than the outer layer lamina, and are disposed at both ends in the longitudinal direction of the inner layer lamina, and have substantially the same moisture content as the inner layer lamina. An architectural wood composite material is provided, comprising wood end lamina of 19% or less, wherein the inner layer lamina and the end lamina are laminated and bonded between the outer layer lamina.

According to the invention of claim 2 of the present invention, the plate member is formed of a plurality of plate members adjacent in the longitudinal direction, and a joint portion of the plate members in the plate members stacked adjacent to each other is formed in a longitudinal direction. A wood composite for architectural use characterized by being spaced apart in a direction.

According to a third aspect of the present invention, there is provided a wooden composite material for building, wherein the joint portion of the plate member extends along the direction in which the plate members are stacked.

According to a fourth aspect of the present invention, there is provided a wooden composite material for buildings, wherein the outer layer lamina and the end lamina are formed of the same wooden member. .

According to the invention of claim 5 of the present invention, there is provided a wooden composite material for buildings, wherein the end lamina has a length of 20% or less of the outer lamina.

According to the invention of claim 6 of the present invention, there is provided a wooden composite material for building, wherein reinforcing members arranged in a staggered manner are inserted into the outer layer lamina in the laminating direction. You.

According to the seventh aspect of the present invention, a plywood for a softwood structure, OSB, MDF, PSL, LVL, OS
L and lawan. An inner layer lamina formed by arranging a plurality of plate members adjacent to each other so that joint portions of the plate members are separated from each other in the longitudinal direction, and both ends of the inner layer lamina in the longitudinal direction. And a wood end lamina having a water content of not more than 19% and having a thickness substantially equal to that of the inner layer lamina and being laminated and bonded to a woody outer layer lamina of not more than 19%. A method for producing a wood composite is provided.

According to the invention of claim 8 of the present invention, there is provided a method for manufacturing a wooden composite material for building, wherein the outer layer lamina and the end lamina are formed of the same wooden member. Provided.

According to the invention of claim 9 of the present invention, plywood for a softwood structure, OSB, MDF, PSL,
A plurality of plate members having plate members selected from LVL, OSL, and Lauan adjacent to each other are laminated so that the joints of the plate members are separated from each other in the longitudinal direction, and the plate members laminated between the outer layer lamina are laminated. An end lamina having a water content of 19% or less and substantially the same thickness as the laminated plate is disposed at both ends in the longitudinal direction, and a wooden outer lamina having a water content of 19% or less is laminated on the plate and the end. A method of manufacturing a wooden composite material for buildings, wherein the method is carried out by placing the outer layer lamina, the plate member, and the end lamina at the same time while being placed on a laminar part.

According to a tenth aspect of the present invention, there is provided a method for manufacturing a wooden composite material for building, wherein the outer lamina and the end lamina are formed of the same wooden member. Provided.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. The architectural wood composite material of the present invention has an outer lamina 1
And an inner lamina 2 sandwiched between the outer laminas 1 and, if necessary, an end lamina 3. FIG. 1 is a perspective view showing a case where the wood composite material for construction of the present invention uses an end lamina 3. The dimensions of the outer lamina 1 and the inner lamina 2 are not particularly limited, and if the end lamina 3 is used as required, the inner lamina 2 may be used.
The outer lamina 1 is longer than the outer lamina. In the wooden composite material for building shown in FIG. 1, the outer layer lamina 1 is formed of a longer wooden material than the inner layer lamina 2, and forms the outer layer portion of the wooden composite material for building of the present invention. When the end lamina 3 is used, the outer lamina 1, the inner lamina 2, and the end lamina 3 can be laminated with the same length in the longitudinal direction, or the outer laminas having different lengths can be laminated. The lamina 1, the inner layer lamina 2, and the end lamina 3 may be laminated and bonded and then cut to form the wood composite material for building of the present invention. In FIG. 1, a portion hidden by the outer lamina 1 of the inner lamina 2 and not visible from the outside is indicated by a broken line. Lamina according to the present invention means length (L), width (W),
Regardless of the thickness (T), it refers to a member that is laminated to form the architectural wood composite material of the present invention.

The woody material for forming the outer layer lamina 1 can be appropriately selected as required. Specifically, dodomatsu, matsumatsu, zozomatsu, maimatsu, frame method,
That is, it is possible to use spruce pine fur (SPF) material, rice hemlock and the like which are often used in the two-by-four method. It is preferable to use a desiccant as the woody material for forming the outer layer lamina 1. In this case, the desiccant has a water content of 19% by weight to suppress deformation such as shrinkage of the architectural woody composite of the present invention. % Is preferable. The term “% by weight” as used herein refers to a moisture content on a dry basis. The outer layer lamina 1 is shown in FIG. 1 as being formed from a single wooden plate, but may be formed from a plurality of plates according to the thickness of the plate used.
When these outer laminas 1 are formed from a plurality of plate members, they can be formed by bonding using various adhesives. As the adhesive used at this time, a phenol resin adhesive, a urea resin adhesive, a melamine resin adhesive,
Thermosetting resin adhesives such as polyamide resin adhesives, alkyd resin adhesives, epoxy resin adhesives, polyurethane resin adhesives, and aqueous vinyl urethane adhesives, and thermoplastic resin adhesives can be given.

The material of the inner layer lamina 2 used in the present invention is a plywood (CSP: Canadian Softply Woven) for softwood structure from the viewpoint of preventing deformation such as warping and bending.
od, DFP: Douglas Fir Plywood), Oriented Strand Board (OSB), particle board, long medium-density fiberboard (Medium Densit)
y Fiberboard: MDF), high-performance structural wood material (Parallel Strand Lumber: PSL, Laminated Veneer Lumber (LVL), Oriented Strand Lumber: OS)
L) and Rawan. Moreover, it is also possible to use the inner layer lamina 2 whose longitudinal direction (L) and width direction (W) are smaller than the outer layer lamina 1, and it is a laminated material from the outside of the laminated wooden composite for construction. It is also possible to improve the finish of a wooden building without understanding the appearance.

The architectural composite material of the present invention uses the above engineered wood having high shape stability as the inner layer lamina 2 and is adhered to the outer layer lamina 1. It is also possible to cope with the expansion of each lamina when a water-soluble chemical for performing preservative treatment, termite prevention treatment and flame retardant treatment is injected under pressure into the inner layer lamina 2.

Further, in the present invention, the water content is 19%.
By using the following outer layer lamina 1 and using the inner layer lamina 2 made of plywood having a water content of 14% or less, various chemicals that cannot normally be effectively penetrated unless the water content is reduced are further shortened. Can be permeated. Therefore, the architectural wood composite material of the present invention can be efficiently subjected to antiseptic treatment, termite control treatment, and flame retardant treatment depending on the application. More specifically, the treatment liquid is usually injected for 4 hours by a pressure injection method using rice hemlock having a water content of 60%. Further, when the water content of the woody material is high, about 5 to 8 hours may be required. It is known that the efficiency of the pressure injection method increases as the water content decreases, and at a water content of 40%, the processing time can be reduced to about 2 hours to obtain the same preservative property. . The wooden composite material for construction of the present invention uses an outer lamina and an inner lamina each having a lower moisture content as described above, so that the processing time can be further reduced.

FIG. 2 is a perspective view of the above-described inner layer lamina 2. The inner layer lamina 2 is formed by laminating and bonding a plurality of plate members 4 as shown in FIG. Plate 4
When bonding the above-mentioned phenolic resin adhesive, urea resin adhesive, melamine resin adhesive, polyamide resin adhesive, alkyd resin adhesive, epoxy resin adhesive, polyurethane resin adhesive, A thermosetting resin adhesive such as an aqueous vinyl urethane-based adhesive or a thermoplastic resin adhesive can be appropriately selected and used.

As shown in FIG. 2, a plate member 4 constituting the inner layer lamina 2 is constituted by a plurality of plate members 5 shorter than the inner layer lamina 2 adjacent to each other. Is formed with a joint portion 6 so that the usability of the short plate member 5 is improved and waste of wood is reduced.

The above-mentioned plate member 4 can be cut in advance to the size of the inner layer lamina 2, or after the plate members 4 of different sizes are laminated and bonded, they are required for the inner layer lamina 2. It is also possible to cut it to a size. If the required thickness of the wooden composite material for building can be obtained, the thickness of the plate material 4 used when forming the inner layer lamina 2 is set.
Not all need to be the same thickness. The plate members 5 forming the plate member 4 do not need to have the same thickness for the plate members 5 adjacent to each other, and are combined so that the inner layer lamina 2 has a constant thickness when formed as the inner layer lamina 2. May be laminated and bonded. Further, one plate member 4 can be formed from plate members 5 of the same material, or can be formed of plate members 5 of different materials. By doing so, the usability of the material can be further improved.

When laminating and bonding the inner layer lamina 2 from the plurality of plate members 4, the joining portions 6 of the plate members 5 described above are separated from each other in the adjacent plate members 4 in the longitudinal direction so as to be staggered. It is preferable to arrange them. By arranging the joint portions 6 in a staggered manner with respect to the longitudinal direction to form the inner layer lamina 2, in particular, durability is given to the stress FL shown in FIG. 2 along the laminating direction of the laminated inner lamina 2 formed. It becomes possible.

In FIG. 2, the inner layer lamina 2 includes two plate members 4.
However, it is possible to select the appropriate thickness so as to obtain the required thickness of the architectural wood composite material of the present invention, and to select the number of layers. . However, in order to reduce the production cost and manufacture the wood composite for construction of the present invention, it is desirable to reduce the number of plate materials to be bonded. Also, in consideration of the quality of the wooden composite material for building, if the number of laminas to be laminated and bonded is small, dimensional stability as a building material such as bending and warping after lamination and bonding as a composite material will be impaired. Therefore, in the present invention, as the inner layer lamina 2, plywood for softwood structure such as CSP and DFP with little quality change such as bending and warping, OSB, particle board,
It is preferable to use an engineered wood material such as MDF, PSL), LVL, OSL, and Lauan to adhere the outer layer lamina 1 to the surface by means such as a pressure press. Further, by using the same material as the outer layer lamina 1, it is possible to further impart dimensional stability such as bending and warping. Therefore, it is desirable that the outer layer lamina 1 and an end lamina 3 described later use a different material from the inner layer lamina 2. When the inner layer lamina 2 is used as the outer layer lamina 1 or the end lamina 3, when forming a joint of the conventional frame construction method, which is the object of the present invention, or when performing a curved surface processing when performing a joint processing, This is because the hardened adhesive causes a problem such as severe deterioration of the cutting blade, which reduces the usability of the architectural composite material.

FIG. 3 is a diagram showing details of a joint portion of a plate material 4 used for the inner layer lamina 2 of the present invention. FIG. 3 (a)
In FIG. 2, the laminating direction of the plate material 3 is indicated by X, the longitudinal direction by Y, and the width direction by Z (a direction perpendicular to the paper). The joint portion of the plate member 4 of the present invention is formed from the ends 5a and 5b of the two plate members 5 facing each other, and the space between the ends 5a and 5b is filled with the adhesive 7. It is shown. The space between the ends 5 a and 5 b is shown larger than the space in the actual plate 4. The adhesive 7 is applied to the end 5 in advance.
a and 5b can be interposed between the inner laminator 2 and the adhesive 7 by the capillary action under pressure during the laminating and bonding of the inner layer lamina 2 without applying the adhesive 7 by a method such as coating or spraying. It may be filled. The ends 5a and 5b of the plate member 5 of the present invention
The drawing shows that the plate members 5 are configured to be easily laminated by a butt joint.

FIG. 3 (b) is a view of the joint portion 6 of the wooden board member for building according to the present invention as viewed from the direction of the X axis shown in FIG. The joint 6 shown in FIG. 3B is an end 5 of the plate member 5.
a and 5b are shown extending along the Z direction in FIG. In the plate member 5 used in the present invention, the joint 6 is not necessarily formed as shown in FIG.
It is not necessary to extend along the direction, and FIG.
As shown in (c), it may be provided to be inclined with respect to the Z direction. However, the joint 6 shown in FIG.
In order to secure the strength against the stress FL from the X direction in FIG. 3, the plate members 4 need to be separated from each other in the Y direction and have a zigzag shape.

As shown in FIG. 1, a woody end lamina 3 can be used in the wooden composite material for construction of the present invention, if necessary. The end lamina 3 is located between the outer lamina 1 and adjacent to both ends of the inner lamina 2.
The inner lamina 2 has substantially the same thickness. When the end lamina 3 is used, it is preferable that the length of the end lamina 3 be 20% or less of the length of the outer layer lamina 1. The end lamina 3 used in the architectural wood composite material of the present invention is made of the same material as the outer lamina 1 in terms of deformation such as warping and bending and appearance, and has a water content of 19% by weight.
It is preferable that: By using the end lamina 3 in this manner, mounting of reinforcing members such as nails, wood screws, and bolts in the wooden composite material for construction of the present invention is facilitated not only at the processing site but also at the construction site. The end cutting of the wooden composite material for construction of the present invention can be facilitated.

FIG. 4 is a view showing an embodiment in which a reinforcing member 8 such as a nail is used in the wooden composite material for construction of the present invention. FIG. 4 (a) is a perspective view showing an embodiment in which the end lamina 3 of the end A of the wooden composite material for construction of the present invention is not used, and FIGS. 4 (b) and 4 (c). FIG. 3 is a perspective view of an end A of the embodiment when the end lamina 3 is used, as viewed from the left and right directions. When the reinforcing member 8 is used, it is particularly preferable to insert the reinforcing member 8 in a staggered manner so as to penetrate the outer layer lamina 1 of the wooden composite material for construction of the present invention to the inner layer lamina 2 in the laminating direction. These reinforcing members 8
In the embodiment shown in FIG. 4 (a), two staggered outer layer laminas 1 are arranged so that the reinforcing members 8 do not come into contact with each other from the opposing outer layer lamina 1. Is shown. By arranging the reinforcing members 8 in this manner, the strength of the architectural wood composite material of the present invention can be improved. FIGS. 4B and 4C show another embodiment in which the reinforcing members 8 are arranged in a staggered manner. FIG. 4B is a perspective view showing the arrangement of the reinforcing members 8 when the wooden composite material for construction of the present invention is viewed from the right side of the drawing. In the embodiment shown in FIG. 4B, the reinforcing member 8 is fixed at a fixed distance t from the widthwise end of the outer lamina 1.
And two rows along the width direction of the rows of the reinforcement members 8 separated in the width direction and the rows of the reinforcement members 8 separated in the width direction in parallel with the row, and a total of six reinforcement members in three rows in the longitudinal direction 8 are shown for the outer lamina 1. FIG. 4C shows the arrangement of the reinforcing members 8 when the same end indicated by A of the wooden composite material for construction of the present invention shown in FIG. 4B is viewed from the left in the drawing. FIG. As shown in FIG. 4C, the reinforcing member 8 is separated from the end on the side opposite to the end in the width direction shown in FIG. And two rows of the reinforcing members 8 arranged in parallel to this row, and as in FIG. 4B, six reinforcing members 8 are connected to the outer layer lamina 1 shown in FIG. 4B. It is shown located on the opposing outer layer lamina 1. The distances t and t 'can be the same or different values. FIG. 4B and FIG.
These reinforcing members 8 shown in (c) are arranged in a staggered manner so as to be staggered in the laminating direction between the outer laminas 1 facing each other. These reinforcing members 8
Need not necessarily be arranged as rows parallel to each other, and may be arranged in a staggered manner as shown in FIG. 4 (a) on one side of the outer layer lamina 1 as shown in FIG. 4 (a). good.

A method for producing a wooden composite material for building according to the present invention will be described with reference to FIGS. In the production of the wooden composite material for construction of the present invention, a pressure press 9 is used as a pressure means. In the method for producing a wooden composite material for building of the present invention, first,
When the arm 10 is moved to the vertical position which is the pressing position shown in FIG. 5 on the arm 10 moved to the horizontal position of the pressing press 9, the lower layer is placed on the lower plate 11. An outer layer lamina 1a is disposed. Next, the inner layer lamina 2 is placed on the outer layer lamina 1 while the adhesive is disposed between the outer layer lamina 1a and the inner layer lamina 2. At this time, the joining portion 6 of the plate member 5 of the plate material 4 forming the inner layer lamina 2
It is staggered. Next, the outer lamina 1b which is to be an upper layer at the time of pressurization is arranged above the inner lamina 2 via an adhesive. The outer layer lamina 1 and the inner layer lamina 2 of this combination are overlapped with each other so that they can be laminated and adhered to each other. Next, the arm 10 on which the plurality of outer laminas 1 and the inner layer lamina 2 are placed is moved in the vertical direction to hold each lamina, and the plurality of pressing plates 12 provided above the pressing press 9 are moved to the uppermost position. Is brought into contact with the outer layer lamina 1b to apply pressure and perform bonding. At this time, heating may be performed. The heating and pressurizing conditions at this time can be appropriately set according to the type of the wood material used and the type of the adhesive. Thereafter, by cutting the wooden composite for building according to the present invention as necessary, the wooden composite for building of the present invention can be formed.

In the above-described manufacturing method of the present invention, it is described that the inner layer lamina 2 is already laminated from a plurality of plate members 4. However, in another embodiment of the manufacturing method of the present invention, FIG. ), The inner layer lamina 2 is not laminated and bonded in advance, but the plate members 5 are arranged on the outer lamina 1a such that the joints 6 of the plate members 5 are staggered with each other in the longitudinal direction. Alternatively, the inner laminator 2 and the outer lamina 1 can be simultaneously laminated and bonded by the press 9 while being sandwiched by the outer lamina 1b. As described above, at which stage the inner lamina 2 is bonded and bonded,
It can be appropriately set in consideration of the strength, shape stability, manufacturability and the like of the wooden composite material for construction of the present invention. The same manufacturing method can be used for the case where the end lamina 3 is used as required. Thereafter, the architectural composite material of the present invention is subjected to processing such as antiseptic processing, flame-retardant processing, and termite control processing as necessary. At this time, when preservative processing is performed by, for example, a pressure injection method, it is performed by setting the water content of rice hemlock to 60% or less for 4 hours.

The wooden composite material for buildings of the present invention is used not only as a structural material for general wooden buildings such as columns, beams, pulling bars, girders, etc., but also because the end portions and side surfaces can be easily processed. Splicing, large insert, stool joint, flat tenon, large insert, stool, stool or joint, joint with joint, joint with joint, joint with umbrella car, joint with umbrella, joint with two eyes Various joints, such as seam joints, can be easily formed and used as structural materials for forming these joints, and also widely used as members for interior and exterior parts of square log houses. It is possible.

Hereinafter, the present invention will be described with reference to examples.
The present invention is not limited to the embodiments.

Example <Wooden Composite for Building> Two wooden plywoods (CSP) having a thickness of 15.5 mm were laminated and bonded to each other to form an inner layer lamina, and an SPF208 material was used as an outer layer lamina. 105mm (T) ×
It was formed into a size of 180 mm (W) × 3660 mm (L), and its strength was tested. At this time, the joints of the inner lamina were arranged in a staggered manner.

As the adhesive, an aqueous vinyl urethane-based adhesive (Dick Bond V-165 manufactured by Dainippon Ink and Chemicals, Inc.) was used, and as the press machine, a vertical multi-panel press KU-SD, type 0720 was used. (Made by Kobayashi Machinery Co., Ltd.) and the pressing conditions were as follows.
At 40 ° C and a pressure of 10kgf
/ Cm ² .

When a nail is used as a reinforcing member, a CN nail certified by the two-by-four construction method and a length of 90 mm is used as a nail. In the test, a wooden composite material for building is placed on one side of the outer lamina. A total of six nails are driven in two rows at a distance of 36 mm from the end in the width direction with a distance of 72 mm in the width direction and three rows with a distance of 200 mm in the longitudinal direction. The outer lamina is arranged in two rows at a distance of 72 mm in the width direction at a position 36 mm apart from the end on the opposite side of the width direction end, and at a distance of 200 mm in the longitudinal direction.
A total of six nails in a row were driven in, and the nails were arranged so as to form a staggered staggered width direction. Table 1 shows details of the architectural wood composite material of the present invention used in the test. When the end lamina was used, an end lamina having the same thickness as the inner layer lamina and a length of 400 mm was used.

[Table 1] <Test Method> The test was conducted using the bending A test of “Japanese Agricultural Standards for Structural Glued Laminated Wood”, with the load parallel to the stacking direction and the span of 1 width.
Eight times 324cm, distance between load points 72 times four times the width
m and a two-point load method. For the test, a full-scale wood tester WU1000 (capacity 1000) manufactured by Tokyo Koki Co., Ltd.
kN), the bending Young's modulus and the bending strength were calculated from the following formula using the load increment in the proportional range, the corresponding deflection increase, and the maximum load.

(Equation 1)

(Equation 2) Here, ΔP is the difference (kgf) between the upper limit load and the lower limit load in the proportional range, Δy is the deflection of the center of the span with respect to ΔP (cm), l is the span (cm), and S is the distance between the load points. (Cm), b is the thickness of the specimen (cm), h is
The width of the specimen (cm), _Pb is the maximum load (kgf), Δ
P: difference between upper limit load and lower limit load in proportional range, Δy: Δ
Deflection of midspan corresponding to P, E _b: Bending Young's modulus, sigma _b: a bending strength. Table 2 shows the results of the bending test.

[Table 2]

(Comparative Example) As a comparative example, when a strength test was performed using solid Yonematsu pine and glued pine wood, the bending strength and Young's modulus of the solid Yonematsu were 318 kgf / cm.
² , 70.9 × 10 ³ kgf / cm ² , 319 kgf / cm ² , 104.6 × 10 ³ k
A value of gf / cm ² was obtained.

As described above, it was found that the woody composite material for construction of the present invention had a bending strength and a Young's modulus which were equal to or higher than those of the conventional solid Japanese pine wood and glued laminated pine wood.

Industrial Applicability As described above, according to the present invention, wood can be effectively used and easily manufactured, has sufficient strength, and can be laminated by a butt joint without using a finger joint. Possible, and has sufficient strength, has a wider application than before, and can easily perform curved surface processing such as a joint portion, and is inexpensive for a wooden composite material for building and a wooden composite material for building. It is possible to provide a manufacturing method.

[Brief Description of the Drawings]

FIG. 1 is a perspective view of a wooden composite material for construction of the present invention;

FIG. 2 is a perspective view of an inner layer lamina used in the present invention;

FIGS. 3A, 3B, and 3C are views showing a plate member joint of the present invention;

4 (a), 4 (b), and 4 (c) are perspective views showing the arrangement of a reinforcing bracket according to the present invention.

FIG. 5 is a diagram showing a method for producing a wooden composite material for building according to the present invention;

FIGS. 6 (a) and 6 (b) are diagrams showing, as a flow chart, a method for producing a wooden composite material for building according to the present invention.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B27M 3/00 B27D 1/04 E04C 3/12

Claims (10)

(57) [Claims] 1. A woody outer lamina having a moisture content of 19% or less, plywood for softwood structure, OSB, MDF, PSL, LV
A plurality of plate members selected from L, OSL, and Lauan are laminated, and the inner lamina is shorter than the outer lamina. The inner lamina is disposed at both ends in the longitudinal direction of the inner lamina, and is substantially the same as the inner lamina. An architectural wood composite material comprising thick wood end lamina having a moisture content of 19% or less, wherein the inner lamina and the end lamina are laminated and bonded between the outer lamina. 2. The plate member is formed of a plurality of plate members adjacent to each other in the longitudinal direction, and joints of the plate members in the plate members stacked adjacent to each other are positioned so as to be separated in the longitudinal direction. The wood composite for architectural use according to claim 1, characterized in that: 3. The joining part of the plate member extends along a laminating direction of the plate members.
A wood composite material for construction according to claim 1. 4. The wooden composite material for building according to claim 1, wherein the outer layer lamina and the end lamina are formed of the same wooden member. 5. The end lamina of the outer layer lamina
The length is set to 0% or less.
The wood composite material for construction according to any one of Items 4 to 4. 6. The wooden composite material for building according to claim 1, wherein reinforcing members arranged in a staggered manner are inserted into the outer lamina in the laminating direction. . 7. Plywood for softwood structure, OSB, MDF, PS
An inner layer lamina formed by arranging a plurality of plate members having plate members selected from L, LVL, OSL, and Lauan adjacent to each other such that joints of the plate members are separated from each other in the longitudinal direction; A wood end lamina, which is arranged at both ends in the longitudinal direction and has substantially the same thickness as the inner lamina and a water content of 19% or less, is laminated and bonded between the wooden outer lamina of a water content of 19% or less. Manufacturing method of wood composite material for building. 8. The method according to claim 7, wherein the outer lamina and the end lamina are formed of the same wooden member. 9. A plywood for softwood structure on an outer layer lamina, OS
A plurality of plate members selected from B, MDF, PSL, LVL, OSL, and warrant are stacked so that the joints of the plate members are separated from each other in the longitudinal direction. At both ends in the longitudinal direction of the laminated plate material, an end lamina having a water content of 19% or less and substantially the same thickness as the laminated plate material was disposed, and a wooden outer lamina having a water content of 19% or less was laminated. A method of manufacturing a wooden composite material for building, comprising: placing the outer layer lamina, the plate member, and the end lamina simultaneously on the plate and the end lamina, and laminating and bonding the outer lamina. 10. The method according to claim 9, wherein the outer layer lamina and the end lamina are formed of the same wooden member.