JPH10128710A - Reinforced wooden material and its preparation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforced wooden material which can ensure strength and rigidity being the same level as those for a large cross section by a small cross section and is economically excellent and its preparation. SOLUTION: A tension member 3-reinforced wooden material 1 comprises strands being slenderly cut along the fiber direction of wood, an adhesive 4 applied on the surfaces of the strands and continuous wire-like tension members 3 and a number of the strands are accumulated approximately in parallel in their longer directions and the tension members 3 are arranged in the accumulated strand accumulated body 2 along its longer direction and under a condition where a tensile condition of the tension members 3 is held, the strand accumulated body 2 is adhered and bonded under pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced wood material reinforced with a tendon material and a method for producing the same.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 50-17512 discloses a fixed-size material in which a strand (lignocellulose fiber) obtained by cutting wood into a thin shape is fixed with an adhesive. The sizing material described in the above publication has a resin solid content of the adhesive and a density of the obtained sizing material that is equal to or more than the strength of the sawn material cut and collected from the raw wood species. Due to the small diameter, low density, poor graininess, poor strength, etc., lignocellulosic substances that have not been conventionally used industrially,
It has become industrially available for architectural purposes. In addition, since a strand (lignocellulosic fiber) obtained by cutting wood into a slender shape is fixed with an adhesive, it is possible to effectively utilize waste material lost in finishing and cutting during sawing.

[0003] As another prior art, a laminated timber reinforced with a tendon is described in Japanese Patent Application Laid-Open No. 6-229065. The glued laminated material reinforced with the tension material described in the above publication is formed by laminating lamina (constituent material) having no groove and a plurality of laminas having a groove and joining them together. Is formed, and a tensile force is introduced into the tension member (PC steel rod) inserted through the through hole. As a result, the laminated timber is prestressed and strengthened, so that when used as a horizontal straight beam in a large space building, the beam does not need to have a large cross section, which is economical.

[0004]

However, the above-mentioned conventional fixed-size materials have insufficient strength and rigidity when the resin solid content of the adhesive and the density of the obtained fixed-size materials are low.
Further, as for structural materials such as beams and columns in architecture, there is a demand for wood having increased strength and rigidity without increasing the cross section.
In addition, since the above-mentioned laminated wood reinforced with the tendon is a laminated beam for a large span in which the lamina is reinforced with the tendon,
Requires long, wide lamina (constituent material). For this reason, when used as structural materials such as beams and columns in construction, there are problems in that the size of raw wood is limited and waste materials cannot be used effectively, which is not economical.

The present invention has been made in order to solve the above problems, and provides an economically excellent reinforced wood material capable of securing the same strength and rigidity in a small cross section as in a large cross section, and a method for producing the same. The purpose is to do.

[0006]

The present invention according to claim 1 is a reinforced wood material reinforced with a tendon material, wherein the reinforced wood material is a strand cut in an elongated shape along the fiber direction of the wood. And an adhesive applied to the surface of the strand, and a long wire-like tension member, and a large number of the strands are accumulated substantially in parallel in the longitudinal direction, and the longitudinal direction is arranged inside the accumulated strand aggregate. The tension member is arranged along, and in a state where the tension state of the tension member is maintained,
The strand aggregate is bonded and joined under pressure.

According to a second aspect of the present invention, there is provided a method for producing a reinforced wood material reinforced with a tendon material, wherein an adhesive is applied to the surface of a strand which has been cut into a long and thin direction in the fiber direction of wood.
A large number of strands are accumulated in substantially parallel in the longitudinal direction to form a strand aggregate, and a wire-like tendon is arranged inside the accumulator along the longitudinal direction. Both ends of the material are stopped by appropriate means, and the aggregate is adhesively bonded under pressure while maintaining the tensioned state of the tendon material.

According to a third aspect of the present invention, there is provided a reinforced wood material reinforced with a tendon material, wherein the reinforced wood material is a strand which is cut into an elongated shape along a fiber direction of wood, and a surface of the strand. And a plurality of strands are accumulated substantially parallel to each other in the longitudinal direction, and the tension members are heated inside the accumulated strand aggregates. The strand aggregate is bonded and attached under pressure while being placed and in a state where the tendon is kept in a heat-expanded state, and then cooled to room temperature.

According to a fourth aspect of the present invention, there is provided a method for producing a reinforced wood material reinforced with a tendon material, wherein an adhesive is applied to the surface of a strand which has been cut into a long and narrow direction in the fiber direction of wood.
At the same time, a large number of the strands are accumulated in substantially parallel in a longitudinal direction to form a strand aggregate, and at the same time, a short wire-like metal tendon is disposed therein, and the strand accumulator on which the metallic tendon is disposed is heated. Then, while maintaining the heat-expanded state of the tendon, the integrated body is bonded and bonded under pressure, and then cooled to room temperature.

[0010]

In the reinforced wood material according to the first and second aspects of the present invention, the strand material is disposed inside the strand aggregate along the longitudinal direction, and the strand aggregate is maintained in a state where the tension material is kept in a tensioned state. Since it is adhesively bonded under pressure, the tendon exists in a prestressed state and acts in a direction to cancel the stress generated when a load such as bending is applied, and the bending rigidity and bending strength are improved. . Therefore, the same strength and rigidity can be secured in a small cross section as in a large cross section.

Further, since the tension member is arranged inside the strand aggregate, when the strand aggregate is bonded and bonded under pressure, the tension member is also bonded to the strand. Accordingly, even if the reinforced wood material of the present invention is arbitrarily cut, the pressed and squeezed state of the tendon material is maintained, so that high bending rigidity and bending strength can be ensured even after the cutting process.

Further, the above-mentioned reinforced wood material of the present invention comprises:
A large number of strands that have been cut in the direction of the fiber of the wood are accumulated in large numbers, and since this strand aggregate is bonded and joined, it is long without being limited by the size of the raw wood,
It is possible to obtain a product having a large cross section, and it is also possible to effectively use the offcuts and waste materials of lumber.

[0013] In the reinforced wood material according to the third and fourth aspects, a short wire-like metal tendon is arranged in a heated state inside the accumulated strand aggregate, and the tendon is kept in a heat-expanded state. In this state, the strand aggregate is bonded and bonded under pressure, and then cooled to room temperature. Works in a direction to cancel the stress generated when a load is applied, thereby improving bending rigidity and bending strength. Therefore, the same strength and rigidity can be secured in a small cross section as in a large cross section.

Further, since the short wire-shaped metal tension member is arranged inside the strand aggregate, the tension member is also adhesively bonded to the strand when the strand aggregate is bonded and bonded under pressure. Accordingly, even if the reinforced wood material of the present invention is arbitrarily cut, the prestressed state of the tendon material is maintained, so that high bending rigidity and bending strength can be ensured even after the cutting process.

Further, in the reinforced wood material, a large number of strands which are cut in the direction of the fiber of the wood are accumulated.
Since this strand aggregate is adhesively bonded, long and large-section products can be obtained without being limited by the size of the raw wood, and the effective use of sawn timber and waste materials Can be.

[0016]

Embodiments of the present invention will be described with reference to the drawings. 1 to 4 show an embodiment of the present invention. FIG. 1 is a perspective view of a reinforced wood material, FIG. 2A is an enlarged end view of a portion A in FIG. 1, and FIG. Perspective view,
FIG. 3 is a perspective view of the tension member, FIG. 3 is an enlarged side view of a portion B in FIG. 1, and FIG. 4 is an explanatory diagram showing a manufacturing process of the reinforced wood material of FIG. 1. 5 and 6 show another embodiment of the present invention. FIG. 5 is a longitudinal sectional view of a reinforced wood material, and FIG. 6 is an explanatory view showing a part of a manufacturing process of the reinforced wood material of FIG. .

1 to 6, 1 and 10 are reinforced wood materials, 2 and 20 are strand aggregates, 21 is a strand,
3 is a tendon, 30 is a metallic tendon, 31 is a fixing plate, 32
Is an arrow indicating the tensile direction of the tendon material, 4 is an adhesive, 5 is a female mold for molding, 51 is a male mold for molding, 52 is an arrow indicating a pressing direction, W is wood, W0 is a fiber direction of wood, and W1 is Is veneer, W
2 is a dry veneer.

First, an embodiment of the present invention will be described with reference to FIGS. The reinforced wood 1 according to the present invention is shown in FIGS.
As shown in FIG. 3, the reinforced wood material 1 is reinforced by the tendon material 3. The reinforced wood material 1 includes a strand 21 cut into a slender shape along a fiber direction W0 of wood W (see FIG. 4) described later. The strand 21 is composed of an adhesive 4 applied to the surface of the strand 21 and a tension member 3 in the form of a long wire.

The wood W is not particularly limited, and may be any of conifers, hardwoods, tropical trees and the like.
Also, small-diameter wood having low utility value as a building material, used or used wood that has already been used, or sawn wood generated at a sawmill or the like can be used. In particular, the backboard of cedar, cypress, and the like generated in large quantities from a sawmill is suitable for industrial use because it can secure a supply amount and can be obtained at low cost. The wood W is appropriately dried and used in order to lower the water content of the finished product.

As shown in FIG. 4, the strand 21 is obtained by peeling wood W (in this embodiment, small-diameter log) in the circumferential direction to form a veneer W1. The veneer W1 extends along the fiber direction W0. It is cut into an elongated shape. The veneer W1 is appropriately dried and used as a dried veneer W2 in order to reduce the water content of the finished product. As shown in FIG. 2 (b), the cross section of the strand 21 is rectangular, but may be any of a square, a thin plate, a circle, or a different shape. The length of the strand 21 is
It may be any of a long one, a single one, or a mixture of a long one and a short one. Also, the strand 21
Other than the above-mentioned peeling, it may be made by any means such as slicing, crushing and cutting.

The adhesive 4 applied to the surface of the strand 21 is made of a phenol / formaldehyde resin, and when cured by heating, has excellent water resistance, flame retardancy, Can be suitably used because the amount of generated gas is small. The adhesive 4 may be a reactive adhesive such as a urethane resin-based adhesive, a urea resin-based adhesive, an epoxy resin-based adhesive, a rubber-based adhesive, an emulsion-based adhesive, or the like, in addition to the phenol formaldehyde. Is also good.

As shown in FIG. 2C, the tension member 3 is a long wire and is a PC steel wire.
As the tendon 3, PC steel wire,
A PC steel bar or the like is suitable, but is not particularly limited. For example, aluminum wire, nylon fiber, or the like can be used, and these can be easily cut with a circular saw or the like after molding, which is preferable in terms of workability.

The reinforced wood material 1 of this embodiment is made of the above-mentioned constituent material. However, a large number of the above-mentioned strands 21 are accumulated substantially in parallel in the longitudinal direction, and the inside of the strand aggregate 2 on which the strands 21 are accumulated is arranged. In addition, the tension member 3 is arranged along the longitudinal direction. And
The tension member 3 is maintained in a tensioned state, and the strand aggregate 2 is adhesively bonded under pressure by an adhesive 4 applied to the surface of the strand 21.

Next, a method of manufacturing the reinforced wood 1 will be described with reference to FIG. First, FIG. 4 (a) shows a manufacturing process of the dried veneer W2, in which the log-shaped wood W is peeled in the circumferential direction and stretched flat.
A single plate W1 having a thickness of 2.5 to 3.0 mm is obtained. This veneer W1 is dried in order to lower the moisture content of the reinforced wood 1 completed in a later step to obtain a dry veneer W2.

Next, as shown in FIG. 4 (b), the fiber direction W0 of the dried veneer W2 is set at right angles to the feeding direction.
The strand 21 is obtained by cutting into a slender shape with a cutting machine. This strand 21 has a thickness of 2.5 to 3.0 mm and a width of 12 mm.
mm, the length of which is several times to several hundred times as long as the width, and the fiber direction W0 of the wood is oriented in the longitudinal direction.
An adhesive 4 made of a phenol formaldehyde resin is applied to the surface of the strand 21 by spraying or dipping.

The strand 21 coated with the adhesive 4
Is charged into the female mold 5 as shown in FIG. This female mold 5 has a cavity (hollow portion) made substantially the same as the external dimensions of the reinforced wood material shown in FIG. 1, and has a total of six, two vertically and three horizontally. The tension member 3 is arranged in the longitudinal direction of the female mold 5. Both ends of the tendon 3 are made to penetrate and protrude from the female mold 5, and fixing plates 31, 31 are attached to both ends of the protruding tendon 3, and both ends of the tendon 3 are fixed to the fixing plate 31 and stopped. .

Next, as shown in FIG. 4D, the tension members 3 are held in a tensioned state by pulling the fixing plates 31, 31 in the direction of the arrow 32. In the above state, the plate-shaped male mold 51 is attached to the female mold 5 and hermetically sealed, the male mold 51 and the female mold 5 are heated, and the strands 21 put into the cavity are heated. As for the heating method, the male mold 51 and the female mold 5 may be heated by attaching an electric heater thereto, but may be heated by a high-frequency heating device, or by injecting heated steam into the female mold 5. It may be heated.

As described above, when the male mold 51 is pressed in the direction shown by the arrow 52 while the strands 21 are heated to a predetermined temperature, the strands 21 are compressed and dense, and
A dense strand assembly 2 is formed. At the same time, the adhesive 4 applied to the surface of the strand 21 reacts and hardens, and the strands 21 are adhesively bonded to each other. At the same time, the tendon material 3 arranged inside the strand aggregate 2 is also adhesively bonded to the strand 21. You.

Finally, after cooling the female mold 5 and the male mold 51, the pressing of the male mold 51 and the tension of the fixed plate 31 are released, and the male mold 51, the fixed plate 31 and the side plate of the female mold 5 are removed. The molded product is taken out of the female mold 5 by pressing. Since the tendon 3 protrudes from both ends of the taken-out molded product, when the protruding tendon 3 is cut, the reinforced wood 1 as shown in FIG. 1 is obtained.

Next, the operation of this embodiment will be described. In the reinforced wood material 1 of the present embodiment, the tension members 3 are arranged along the longitudinal direction inside the strand aggregate 2 in which the strands 21 are accumulated, and the tension state of the tension members 3 is maintained. Since the strand aggregate 2 is bonded and joined under pressure, the tendon 3 is
1 are bonded and restrained and exist in a prestressed state. Therefore, the tension member 3 in the prestressed state is
It acts in a direction to cancel the stress generated when a load such as bending is applied, and the bending stiffness and bending strength are improved. Therefore, the same strength and rigidity can be secured in a small cross section as in a large cross section.

Further, since the tension members 3 are arranged inside the strand aggregates 2, when the strand aggregates 2 are adhesively bonded under pressure, the tension members 3 are also adhesively bonded to the strands 21. As a result, the prestressed state of the tendon material 3 is maintained even when the reinforced wood material 1 of this embodiment is arbitrarily cut, so that high bending rigidity and bending strength can be ensured even after the cutting process.

Further, the reinforced wood material 1 is formed by accumulating a large number of strands 21 which are cut into a strip in the fiber direction W0 of the wood, and the strand aggregates 2 are bonded and joined. A product with a long and large cross section can be obtained without restriction. In addition, it is possible to effectively utilize the offcuts and waste materials of sawn timber, which is economically excellent.

In the method of manufacturing the reinforced wood 1, the fixing plate 31 is placed in the female mold 5, the tension member 3 is arranged, and when the tension member 3 is pulled, the fixing plate 31 is substantially in the female mold 5.
May be integrally formed with the fixed plate 31 so that the fixed plate 31 is located on both sides of the reinforced wood 1. Then, even if the adhesion between the tendon 3 and the strand 21 is insufficient, the tensioned state of the tendon 3 can be reliably maintained even after the product is formed.

Next, another embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. The reinforced wood material 10 according to the present invention includes:
As shown in FIG. 5, the reinforced wood material 10 is reinforced by a tendon material 30. The reinforced wood material 10 includes a strand 21, an adhesive 4 applied to the surface of the strand 21, and a short wire-shaped metal. It is composed of a tension member 30. Since the strand 21 and the adhesive 4 are the same as those shown in the above embodiment, the same reference numerals are given and the description is omitted.

The metal tension member 30 is in the form of a short wire, and is an aluminum wire. The metal tension member 30 is not limited to an aluminum wire, but may be a steel wire, a copper wire, or the like. When an aluminum wire or a copper wire is used, it is easy to cut with a circular saw or the like, which is preferable in terms of workability.

The reinforced wood material 10 of the present embodiment is made of the above-mentioned constituent material. However, a large number of the strands 21 are accumulated substantially in parallel in the longitudinal direction, and the tension is accumulated inside the accumulated strand aggregate 20. In a state where the material 30 is arranged and the expansion state caused by the heating of the tendon material 30 is maintained, the strand aggregate 20 is bonded and bonded under pressure by the adhesive 4 and then cooled to room temperature.

Next, a method for producing the reinforced wood material 10 will be described with reference to FIG. As in the above-described embodiment, the adhesive 4 is applied to the surface of the strand 21 that is cut into a strip in the fiber direction W0 of the wood. The strand 21 coated with the adhesive 4 and the metal tendon 30 are separated from each other by a female mold 50.
Put in. At this time, a large number of strands 21 are gathered substantially parallel to each other to form a strand aggregated body 20 and, at the same time, a metal tendon 30
Are arranged randomly. The female mold 50 has a cavity substantially the same as the external dimensions of the reinforced wood material 10 shown in FIG.

Next, a plate-shaped male mold 51 is attached to the female mold 50 and hermetically sealed, and the male mold 51 and the female mold 50 are heated so that the strands 21 and the metal tension members 30 charged into the cavity are heated.
Heat. As for the heating method, an electric heater may be attached to the male mold 51 and the female mold 50 for heating. Alternatively, heating may be performed by a high-frequency heating device, or heating steam may be injected into the female mold 5. It may be heated.

As described above, the strand aggregate 20 in which the metal tendon 30 is disposed is heated to a predetermined temperature. Then, the metal tension member 30 thermally expands. By the way,
Since the linear expansion coefficient of aluminum is about five times that of wood, the thermal expansion of the metallic tendon 30 is
Is much larger than the thermal expansion of The adhesive 4 applied to the surface of the strand 21 is pressed while pressing the male mold 51 in the direction of the arrow 52 while maintaining the expansion state of the tendon material 30.
Is reacted and cured. Then, the strands 21 are bonded and bonded to each other, and at the same time, the metal tendon 30 disposed inside the strand aggregate 20 is bonded to the strands 21.

Finally, after the female mold 50 and the male mold 51 are cooled, the pressurization of the male mold 51 is released, the male mold 51 is removed, and the molded product is taken out of the female mold 50, and reinforced as shown in FIG. A wood material 10 is obtained.

Next, the operation of this embodiment will be described. The reinforced wood material 10 of the present embodiment has a structure in which a short wire-shaped metal tendon 30 is arranged in a heated state inside the strand aggregate 20, and the strands 30 are kept in a state where the tendon 30 is heated and expanded. Since the integrated body 20 is bonded and bonded under pressure and then cooled to room temperature, the tension member 30 after cooling is bonded and bonded to the strand 21 to be in a prestressed state, and exists in a load such as bending. This works in the direction to cancel the stress generated when the stress is applied, and the bending rigidity and bending strength are improved. Therefore, the same strength and rigidity can be secured in a small cross section as in a large cross section.

The reinforced wood material 10 of the present embodiment is
Since the prestressed state of the tendon 30 is maintained even if the cutting is performed arbitrarily, high bending rigidity and bending strength can be ensured even after the cutting.

Further, in this embodiment, since the tendon 30 is in the form of a short wire, the tendon 30 can be arranged at random, and a reinforced wood material having little directionality in strength and rigidity can be obtained. it can.

Furthermore, the reinforced wood material 10 is formed by stacking a large number of strands 21 elongated in the fiber direction of the wood and bonding the strand aggregates 20 to each other. It is possible to obtain a product with a large cross section without receiving it, and it is also possible to effectively use the offcuts and waste materials of lumber, which is economically excellent.

[0045]

According to the reinforced wood material according to the first and second aspects, the tension material disposed along the longitudinal direction inside the strand aggregate exists in a prestressed state, and a load such as bending is applied. It acts in a direction to cancel the stress generated when it is bent, and the bending rigidity and bending strength are improved. Therefore, strength and rigidity equivalent to those of the large cross section can be ensured in the small cross section, so that it is economical and the degree of freedom in design is improved.

The reinforced wood material of the present invention can maintain the prestressed state of the tendon even if it is cut arbitrarily.
Since high bending rigidity and bending strength can be secured even after cutting, it is excellent in workability.

Further, the above-mentioned reinforced wood material of the present invention comprises:
A large number of strands that have been cut in the direction of the fiber of the wood are accumulated in large numbers, and since this strand aggregate is bonded and joined, it is long without being limited by the size of the raw wood,
A product with a large cross section can be obtained, and the offcuts and waste materials of lumber can be effectively used, which is economically excellent.

In the reinforced wood material according to the third and fourth aspects, a short wire-like metal tendon is bonded and bonded to the strand to be in a prestressed state, and is generated when a load such as bending is applied. It works in the direction to cancel the stress, and the bending rigidity and bending strength are improved. Therefore, strength and rigidity equivalent to those of the large cross section can be ensured in the small cross section, so that it is economical and the degree of freedom in design is improved.

Further, in the reinforced wood material of the present invention, the prestressed state of the tendon material is maintained even if it is cut arbitrarily, so that high bending rigidity and bending strength can be secured even after the cutting process. Furthermore, since the tendon is in the form of a short wire,
This tendon can be arranged randomly, strength,
It is possible to obtain a reinforced wood material having less rigidity and directionality.

Further, the above-mentioned reinforced wood material of the present invention comprises:
A large number of strands that have been cut in the direction of the fiber of the wood are accumulated in large numbers, and since this strand aggregate is bonded and joined, it is long without being limited by the size of the raw wood,
A product with a large cross section can be obtained, and the offcuts and waste materials of lumber can be effectively used, which is economically excellent.

[Brief description of the drawings]

FIG. 1 is a perspective view of a reinforced wood material according to an embodiment of the present invention.

2A is an enlarged end view of a portion A in FIG. 1, FIG. 2B is a perspective view of a strand, and FIG. 2C is a perspective view of a tension member.

FIG. 3 is an enlarged side view of a portion B in FIG. 1;

FIG. 4 is an explanatory view showing a manufacturing process of the reinforced wood material of FIG. 1;

FIG. 5 is a longitudinal sectional view of a reinforced wood material according to another embodiment of the present invention.

FIG. 6 is an explanatory view showing a part of a manufacturing process of the reinforced wood material of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 10 Reinforced wood material 2, 20 Strand integrated body 21 Strand 3 Tensile member 30 Metal tonic member 31 Fixing plate 32 Arrow indicating the tension direction of tendon member 4 Adhesive 5 Molding female mold 51 Molding male mold 52 Pressing Arrow indicating direction W Wood W0 Fiber direction of wood W1 Veneer W2 Veneer veneer

Claims (4)

[Claims] 1. A reinforced wood material reinforced with a tendon material, wherein the reinforced wood material comprises a strand cut in an elongated shape along a fiber direction of wood, and an adhesive applied to a surface of the strand. , Consisting of long wire-like tendons,
A large number of the strands are accumulated substantially parallel in the longitudinal direction,
The tension member is arranged along the longitudinal direction inside the accumulated strand aggregate, and the strand aggregate is adhesively bonded under pressure in a state where the tension state of the tension member is maintained. Reinforced wooden material reinforced with tension material. 2. An adhesive is applied to the surface of a strand which has been cut in the direction of the fiber of the wood, and a plurality of strands are piled up substantially in parallel in a longitudinal direction to form a strand pile. A wire-like tendon is arranged along the longitudinal direction, a tensile force is introduced into the tendon, and both ends of the tendon are stopped by appropriate means. A method for producing a reinforced wood material reinforced with a tendon material, which is characterized by bonding under pressure. 3. A reinforced wood material reinforced with a tendon material, wherein the reinforced wood material comprises a strand cut in an elongated shape along a fiber direction of wood, and an adhesive applied to a surface of the strand. A plurality of strands are substantially parallel to each other in the longitudinal direction, and the strands are arranged in a heated state inside the integrated strand aggregate, thereby heating the strands. A reinforced wood material reinforced with a tendon material, wherein the strand aggregate is adhesively bonded under pressure in an expanded state, and then cooled to room temperature. 4. An adhesive is applied to the surface of a strand which is cut in the direction of the fiber of the wood, and a plurality of the strands are gathered substantially in parallel in a longitudinal direction to form a strand aggregate, and at the same time, a short piece is formed therein. Arranging a wire-shaped metal tendon, heating the strand aggregate in which the metal tendon is arranged, and bonding and joining the aggregate under pressure while maintaining the heat-expanded state of the tendon, A method for producing a reinforced wood material reinforced with a tendon material, which is then cooled to room temperature.