JP4664698B2 - Composite wood structure material and method for producing composite wood structure material - Google Patents

Description

 The present invention relates to a composite wood structure material and a method of manufacturing a composite wood structure material, and more particularly to a composite wood structure material and a method of manufacturing a composite wood structure material that can exhibit excellent heat resistance performance.

  With recent revisions to the Building Standards Law, wooden buildings can also be built with higher-rise buildings without restrictions on height and scale, as long as they meet the standards set forth in the Building Standards Law. For this reason, development of various wooden buildings using various laminated materials and engineer wood has been actively performed by construction manufacturers and the like.

  In such a wooden building, the cross-sectional area necessary to maintain the proof against long-term load and short-term load is secured, and long-term load is supported even if the surface is carbonized by being exposed to a flame generated by a fire. Development of wood that can be done is needed.

  However, wood structure members exposed to heat from fire burn to form a carbonized layer in the surface layer part, but this carbonized layer continues to burn after the end of the fire, so it is inside the carbonized layer by the heat of combustion. Since the healthy part further burns and loses the load supporting ability, there is a strong demand for solving the drawback.

 The present invention has been made in view of the conventional problems as described above, and reliably prevents the heat of combustion of the carbonized layer from being transmitted to the healthy part inside the carbonized layer, and the load supporting ability is more than necessary. It aims at providing the manufacturing method of the composite wood structure material which can prevent that it falls, and a composite wood structure material.

In order to solve the above problems, the present invention employs the following means.
That is, the invention according to claim 1 is an inner layer composed of a laminated block formed by assembling a plurality of single materials made of wood or different materials, and a single material made of wood or different materials or a plurality of such single materials. A composite wood structure material having an outer layer composed of a laminated block , and an epoxy-based resin adhesive as an adhesive having low heat resistance at the boundary portion or in the vicinity of the boundary between the inner layer and the outer layer , isocyanate type An adhesive layer made of a resin adhesive or a urethane resin adhesive is provided, and the plurality of single materials constituting the integrated material block in the inner layer are bonded by a resorcinol resin adhesive as a highly heat-resistant adhesive. and said that you are.

The invention according to claim 2 is the composite wood structure material according to claim 1, wherein the inner layer includes a load supporting portion sufficient to support a long-term load, and the outer layer includes a burning allowance portion. It is characterized by.
According to the composite wood structure material of the present invention, when the outer layer functions as a burning margin part due to the occurrence of a fire and burns, the adhesive having low heat resistance at or near the boundary between the inner layer and the outer layer as the combustion proceeds The adhesive force of the adhesive layer consisting of the adhesive layer gradually decreases, the outer layer portion located outside the adhesive layer collapses and falls off, and it is prevented from spreading to the inner layer side through this adhesive layer, and the load A long-term load can be continuously supported by the support portion.

The invention according to claim 3 forms a laminated material block by assembling a plurality of single materials made of wood or dissimilar materials and joining adjacent single materials, and the assembled material block has an assembly direction of a single material. A method for producing a composite wood structure material in which a plurality of layers are assembled so as to be in the same direction or different directions, and the adjacent laminated material blocks are joined together to form an inner layer and an outer layer, the inner layer and the outer layer An adhesive layer made of an epoxy resin adhesive, an isocyanate resin adhesive, or a urethane resin adhesive as an adhesive having low heat resistance is provided at or near the boundary of the inner layer, and the integrated material block in the inner layer The plurality of single materials constituting the material are bonded by a resorcinol resin adhesive as an adhesive having high heat resistance .

The invention according to claim 5 is the method for manufacturing a composite wood structure material according to claim 4, wherein the inner layer includes a load support portion sufficient to support a long-term load, and the outer layer includes a burning allowance portion. It is characterized by including.
According to the method for manufacturing a composite wood structure material according to the present invention, when the outer layer functions as a burning margin portion due to the occurrence of a fire and burns, the heat resistance of the boundary portion between the inner layer and the outer layer or near the boundary portion as the combustion progresses. The adhesive strength of the adhesive layer consisting of a low adhesive gradually decreases, preventing the outer layer located outside this adhesive layer from collapsing and falling off and spreading to the inner layer via this adhesive layer. Thus, the inner layer continues to function as a load support portion and can continue to support a long-term load by the inner layer.

As described above, according to the composite wood structure material and the method for producing a composite wood structure material according to the present invention , an epoxy as an adhesive having low heat resistance is provided at or near the boundary between the outer layer and the inner layer. Resorcinol as a highly heat-resistant adhesive comprising a plurality of single materials constituting the integrated material block in the inner layer provided with an adhesive layer made of an epoxy resin adhesive, an isocyanate resin adhesive, or a urethane resin adhesive When the outer layer burns due to the occurrence of a fire because the resin adhesive is used, the adhesive strength of the adhesive layer consisting of an adhesive with low heat resistance gradually decreases as the combustion progresses. portion of the outer layer of which are positioned to fall off collapsed, while being prevented from be spread on the inner side via the adhesive layer, a plurality of single constituting an integrated material blocks in the inner layer It can be suppressed resulting in peeling.

Hereinafter, embodiments of the present invention shown in the drawings will be described.
FIG. 1 shows a first embodiment of a composite wood structure material according to the present invention. This composite wood structure material 1 is an inner layer 2 having a substantially rectangular cross section which becomes the core of the composite wood structure material 1. And an outer layer 10 having a substantially square annular section provided so as to surround the inner layer 2 outside the inner layer 2, and the outer layer 10 functions as a burning margin 28 when a fire occurs, and the inner layer 2 supports a long-term load. It is comprised so that it may function as the load support part 26 to do.

 The inner layer 2 is formed by assembling a plurality of single materials composed of a ground plate, a single plate (LVL), etc., and forming a plate-shaped laminated material block 6 by integrally joining adjacent single materials via an adhesive. It is. Further, the inner layer 2 may be formed in a substantially rectangular cross section by assembling a plurality of such laminated material blocks 6 and integrally joining the adjacent laminated material blocks 6 with an adhesive. .

  As each single material constituting the inner layer 2, tree species used as a pillar material of general wooden buildings such as Yonematsu, Karamatsu, Akatsuki, Cedar, Asunaro are used. Moreover, since the cross-sectional area per one single material is small, the thinning material of these tree species can also be used.

  Adjacent single members of each laminated material block 6 constituting the inner layer 2 are integrally joined by a resorcinol resin adhesive having high heat resistance, and a resorcinol resin adhesive having high heat resistance between adjacent laminated material blocks 6. Are joined together.

  The outer layer 10 forms a laminated material block 11 by assembling a single material made of a ground plate, a single plate (LVL) or the like, or a plurality of such single materials, and joining adjacent single materials together with an adhesive. A plurality of such laminated material blocks 11 are assembled, and the adjacent laminated material blocks 11 are joined together via an adhesive, or between the laminated material blocks 6 of the inner layer 2 via an adhesive. Are integrally formed to form a substantially square annular section. The outer layer 10 functions as a burning allowance 28 when a fire occurs, and prevents a flame from entering the inner layer 2 side for a predetermined time (for example, 1 hour).

  As each single material constituting the outer layer 10, tree species used as a pillar material of general wooden buildings such as Yonematsu, Karamatsu, Kashiwa, Sugi, Asunaro, etc., are used, similarly to the single material of the inner layer 2. Moreover, since the cross-sectional area per one single material is small, the thinning material of these tree species can also be used.

  In the vicinity of the boundary portion between the inner layer 2 and the outer layer 10 (inner peripheral edge portion of the outer layer 10), an adhesive layer 15 made of an adhesive having low heat resistance is provided so as to surround the inner layer 2 including the load support portion 26. Yes.

The adhesive composing the adhesive layer 15 made of an adhesive having low heat resistance is an adhesive whose adhesive strength is remarkably reduced at a temperature of about 150 ° C., for example, epoxy resin adhesive, isocyanate adhesive, urethane Based resin adhesives and the like. However, the present invention is not limited to these, and any device having the same function may be used.
In addition, in FIG. 1, 3 is a burning allowance boundary part at the time of a fire end.

  In the composite wood structure material 1 according to the present embodiment configured as described above, the inner layer 2 including the load support portion 26 in the vicinity of the boundary between the inner layer 2 and the outer layer 10 (inner peripheral edge of the outer layer 10). Since the adhesive layer 15 made of an adhesive having low heat resistance (epoxy resin adhesive, isocyanate adhesive, or urethane resin adhesive) is provided so as to surround the outer layer 10, the outer layer 10 becomes a flame when a fire occurs. When exposed and burned, as the outer layer 10 burns, the adhesive strength of the adhesive layer 15 made of an adhesive having low heat resistance gradually decreases, and the portion of the outer layer 10 located outside the adhesive layer 15 is reduced. It will collapse and drop out.

  Therefore, since it does not spread to the inner layer 2 that functions as the load support portion 26, the inner layer 2 can continue to function as the load support portion 26, and the inner layer 2 can continue to support a long-term load. Can be prevented from collapsing.

  In this case, since it is only necessary to provide the adhesive layer 15 made of an adhesive having low heat resistance near the boundary between the inner layer 2 and the outer layer 10, it is necessary to arrange a flame-proof portion made of a special material in order to prevent the spread of fire. However, the manufacturing cost can be kept low, and an inexpensive product can be provided. In the above description, the column material has been described as an example. However, the present invention may be applied to a wall (a seismic wall, a non-structural wall) or a floor, and in this case, the same effect is achieved.

  FIG. 2 shows a second embodiment of the composite wood structure material according to the present invention. This composite wood structure material 1 has a predetermined thickness over the entire periphery of the outer periphery of the inner layer 2. A portion 27 is provided, and an adhesive layer 15 made of an adhesive having low heat resistance is provided on the outside of the flame stop portion 27 so as to surround the flame stop portion 27. Other configurations are the same as those in the first embodiment. It is the same as that shown in the form. In this case, the inner layer 2 functions as the burnout portion 27 and the load support portion 26, and the outer layer 10 functions as the burnup allowance portion 28. In addition, the flame stop part 27 of the inner layer 2 may function as the load support part 26 in some cases. In addition, in FIG. 2, 3 is a burning allowance boundary part at the time of a fire end.

  For example, the flaming portion 27 assembles a plurality of dissimilar materials and forms a plate-shaped assembly material block by integrally joining adjacent dissimilar materials via an adhesive (resorcinol resin adhesive). A plurality of such laminated material blocks are assembled, and adjacent laminated material blocks are joined to each other via an adhesive (resorcinol resin adhesive) to form a substantially square annular section.

  The dissimilar materials constituting the burn-off portion 27 are made of a high heat capacity material, a heat insulating material, a wood having a large thermal inertia, a wood having a different fiber direction, and the like. Is prevented from reaching the load support portion 26 inside the flame stop portion 27.

  Examples of the high heat capacity material include inorganic materials such as mortar, stone, glass, fiber reinforced cement, various metal materials, and a metal pipe having a hollow rectangular cross section, inorganic material, liquid metal, water, inorganic hydration Examples thereof include a material integrated with a heat storage material such as salt and slaked lime. Moreover, as a heat insulating material, a nonflammable wood, a flame-retardant processing material, a calcium silicate board, rock wool, glass wool etc. are mentioned, for example. Further, examples of the wood having a large thermal inertia include Selangan Batu, Jara, Bongosi and the like.

  Even in the composite wood structure material 1 shown in this embodiment, the load support portion 26 and the flame stop are formed at the boundary portion between the inner layer 2 and the outer layer 10 as in the first embodiment. Since the adhesive layer 15 made of an adhesive (epoxy resin adhesive, isocyanate adhesive, or urethane resin adhesive) having low heat resistance is provided so as to surround the inner layer 2 that is the portion 27, a fire occurs. When the outer layer 10 is sometimes exposed to a flame and burns, the bonding force of the adhesive layer 15 made of an adhesive having low heat resistance gradually decreases as the outer layer 10 burns, and the outer layer 10 is positioned outside the adhesive layer 15. The part of the outer layer 10 to be collapsed will fall off.

  Therefore, since it does not spread to the inner layer 2 that functions as the load support portion 26 and the flame stop portion 27, the inner layer 2 can continue to function as the flame stop portion 27 and the load support portion 26, and the load support of the inner layer 2 is achieved. The entire inner layer 2 including the portion 26 or the burnout portion 27 can continue to support a long-term load, and the building can be prevented from collapsing.

Moreover, since it is sufficient to provide the adhesive layer 15 made of an adhesive having low heat resistance between the flame stop portion 27 and the outer layer 10, the manufacturing can be facilitated and the manufacturing cost can be kept low. Products can be provided.
Furthermore, in this embodiment, since the flame stop portion 27 is provided inside the adhesive layer 15 made of an adhesive having low heat resistance, it is possible to prevent the load support portion 26 from spreading more effectively.
In the above description, the column material has been described as an example. However, the present invention may be applied to a wall (a seismic wall, a non-structural wall) or a floor, and in this case, the same effect is achieved.

  FIG. 3 shows a third embodiment of the composite wood structure material according to the present invention. This composite wood structure material 1 is provided with a thin-walled flame stop portion 27 outside the load support portion 26. An adhesive layer 15 made of an adhesive having low heat resistance is provided on the outer side so as to surround the flame stopper 27, and the other configuration is the same as that shown in the second embodiment shown in FIG. . In this case, the inner layer functions as the load support portion 26 and the burning stop portion 27, and the outer layer 10 functions as the burning allowance portion 28. In addition, in FIG. 3, 3 is a burning allowance boundary part at the time of a fire end.

  And even if it exists in the composite wood structure material 1 shown in this embodiment, the inner layer 2 which is the load support part 26 and the nonflame part 27 on the outer side of the inner layer 2 similarly to what is shown in the said 1st Embodiment. Since the adhesive layer 15 made of an adhesive having low heat resistance (epoxy resin adhesive, isocyanate adhesive, or urethane resin adhesive) is provided so as to surround the outer layer 10, the outer layer 10 becomes a flame when a fire occurs. When exposed and burned, as the outer layer 10 burns, the adhesive strength of the adhesive layer 15 made of an adhesive having low heat resistance gradually decreases, and the portion of the outer layer 10 located outside the adhesive layer 15 is reduced. It will collapse and drop out.

  Accordingly, since the fire does not spread to the inner layer 2 that functions as the load support portion 26 and the flame stop portion 27, the inner layer 2 can continue to function as the load support portion 26 and the flame stop portion 27, and the inner layer 2 can perform long-term load. Can continue to support the building, and can prevent the collapse of the building.

Further, since it is sufficient to provide the adhesive layer 15 made of an adhesive having low heat resistance at the boundary portion between the inner layer 2 and the outer layer 10, the manufacturing can be facilitated and the manufacturing cost can be suppressed at a low cost. Products can be provided.
Furthermore, in this embodiment, since the flame stop portion 27 is provided on the inner side of the adhesive layer 15 made of an adhesive having low heat resistance, it is possible to prevent the fire spreading to the load support portion 26 more effectively.

  FIG. 4 shows a fourth embodiment of a composite wood structure material according to the present invention. This composite wood structure material 1 is composed of two adjacent laminated wood blocks 6 and 6 located in the center. A plurality of laminated material blocks so that the joint portion 8 between the members 7 and 7 and the joint portion 13 between the adjacent single members 12 and 12 of the laminated material blocks 11 and 11 located outside thereof are not located on the same line. 6, 6, 11, 11 are combined to form an overall rectangular shape, and an adhesive layer 15 made of an adhesive having low heat resistance is provided outside the inner layer 2 so as to surround the inner layer 2. The configuration is the same as that shown in the first embodiment.

  In this case, the inner layer 2 functions as the load support portion 26, and the outer layer 10 functions as the burning allowance portion 28. In addition, in FIG. 4, 3 is a burning allowance boundary part at the time of a fire end.

  And even in the composite wood structure material 1 shown in this embodiment, like the one shown in the first embodiment, so as to surround the inner layer 2 that is the load support portion 26 outside the inner layer 2, Since the adhesive layer 15 made of an adhesive having low heat resistance (epoxy resin adhesive, isocyanate adhesive, or urethane resin adhesive) is provided, the outer layer 10 was exposed to a flame and burned when a fire occurred. In this case, as the outer layer 10 burns, the adhesive strength of the adhesive layer 15 made of an adhesive having low heat resistance gradually decreases, and the portion of the outer layer 10 located outside the adhesive layer 15 collapses and falls off. It will be.

  Therefore, since it does not spread to the inner layer 2 that functions as the load support portion 26, the inner layer 2 can continue to function as the load support portion 26, and the inner layer 2 can continue to support a long-term load. It will be possible to prevent the collapse of.

  Further, since it is only necessary to provide the adhesive layer 15 made of an adhesive having low heat resistance on the outside of the inner layer 2, it is not necessary to arrange a fire-proof portion made of a special material in order to prevent the spread of fire, and the manufacturing cost is reduced. Therefore, an inexpensive product can be provided.

  FIG. 5 shows a fifth embodiment of a composite wood structure material according to the present invention. This composite wood structure material 1 is provided at six locations between adjacent laminated wood blocks 6, 6, 11, 11. A single material 19 having a rectangular cross section is interposed, and an adhesive layer 15 made of an adhesive having low heat resistance is provided on the outer side of the inner layer 2 so as to surround the inner layer 2. The other configuration is shown in FIG. This is the same as that shown in the fourth embodiment. In addition, 3 in the figure is a burning allowance boundary at the end of the fire.

  And even in the composite wood structure material 1 shown in this embodiment, like the one shown in the first embodiment, so as to surround the inner layer 2 that is the load support portion 26 outside the inner layer 2, Since the adhesive layer 15 made of an adhesive having low heat resistance (epoxy resin adhesive, isocyanate adhesive, or urethane resin adhesive) is provided, the outer layer 10 was exposed to a flame and burned when a fire occurred. In this case, as the outer layer 10 burns, the adhesive strength of the adhesive layer 15 made of an adhesive having low heat resistance gradually decreases, and the portion of the outer layer 10 located outside the adhesive layer 15 collapses and falls off. It will be.

  Therefore, since it does not spread to the inner layer 2 that functions as the load support portion 26, the inner layer 2 can function as the load support portion 26 and can continue to support a long-term load, thereby preventing the building from collapsing. It will be possible.

  Moreover, since it is only necessary to provide the adhesive layer 15 made of an adhesive having low heat resistance so as to surround the inner layer 2 outside the inner layer 2, it is necessary to dispose a flame stop made of a special material in order to prevent the spread of fire. Therefore, the manufacturing cost can be reduced and an inexpensive product can be provided.

  FIG. 6 shows a sixth embodiment of the composite wood structure material according to the present invention. This composite wood structure material 1 is formed by assembling a plurality of single materials 7, and between adjacent single materials 7,7. Are joined together via an adhesive to form a plate-like laminated material block 6, and a plurality of such laminated material blocks 6 are alternately arranged while changing the direction by 90 degrees, so that the whole has a rectangular cross section. It is configured to have a shape, and the other configurations are the same as those shown in the first embodiment.

  In this case, an inner layer 2 having a substantially rectangular cross section is provided at the center, and an outer layer 10 having a substantially square ring shape is provided outside the inner layer 2 so as to surround the inner layer 2, and heat resistance is provided so as to surround the inner layer 2 outside the inner layer 2. An adhesive layer 15 made of a low adhesive is provided. Further, the inner layer 2 functions as the load support portion 26, and the outer layer 10 functions as the burning allowance portion 28. In addition, in FIG. 6, 3 is a burning allowance boundary part at the time of a fire end.

  And even in the composite wood structure material 1 shown in this embodiment, like the one shown in the first embodiment, so as to surround the inner layer 2 that is the load support portion 26 outside the inner layer 2, Since the adhesive layer 15 made of an adhesive having low heat resistance (epoxy resin adhesive, isocyanate adhesive, or urethane resin adhesive) is provided, the outer layer 10 was exposed to a flame and burned when a fire occurred. In this case, as the outer layer 10 burns, the adhesive strength of the adhesive layer 15 made of an adhesive having low heat resistance gradually decreases, and the portion of the outer layer 10 located outside the adhesive layer 15 collapses and falls off. It will be.

  Therefore, since it does not spread to the inner layer 2 that functions as the load support portion 26, the inner layer 2 can continue to function as the load support portion 26, and the inner layer 2 can continue to support a long-term load. It will be possible to prevent the collapse of.

  Moreover, since it is only necessary to provide the adhesive layer 15 made of an adhesive having low heat resistance so as to surround the inner layer 2 outside the inner layer 2, it is necessary to dispose a flame stop made of a special material in order to prevent the spread of fire. Therefore, the manufacturing cost can be reduced and an inexpensive product can be provided.

 FIG. 7 shows a seventh embodiment of the composite wood structure material according to the present invention, and this composite wood structure material 1 has the same configuration as the laminated wood block 6 shown in the sixth embodiment. Are arranged so as to form a substantially girder shape at the center, and the inner layer 2 having a substantially rectangular cross section is constituted by the portion formed in the cross girder shape, and the outer layer having a substantially angular ring shape so as to surround the inner layer 2 on the outer side 10 is provided to form a rectangular cross section as a whole, and an adhesive layer 15 made of an adhesive having low heat resistance is provided outside the inner layer 2 so as to surround the inner layer 2, and the other configuration is the first embodiment. It is the same as that shown in the form. In FIG. 7, reference numeral 3 denotes a burning margin boundary at the end of the fire.

  And even in the composite wood structure material 1 shown in this embodiment, like the one shown in the first embodiment, so as to surround the inner layer 2 that is the load support portion 26 outside the inner layer 2, Since the adhesive layer 15 made of an adhesive having low heat resistance (epoxy resin adhesive, isocyanate adhesive, or urethane resin adhesive) is provided, the outer layer 10 was exposed to a flame and burned when a fire occurred. In this case, as the outer layer 10 burns, the adhesive strength of the adhesive layer 15 made of an adhesive having low heat resistance gradually decreases, and the portion of the outer layer 10 located outside the adhesive layer 15 collapses and falls off. It will be.

  Therefore, since it does not spread to the inner layer 2 that functions as the load support portion 26, the inner layer 2 can continue to function as the load support portion 26, and the inner layer 2 can continue to support a long-term load. It will be possible to prevent the collapse of.

  Moreover, since it is only necessary to provide the adhesive layer 15 made of an adhesive having low heat resistance so as to surround the inner layer 2 outside the inner layer 2, it is necessary to dispose a flame stop made of a special material in order to prevent the spread of fire. Therefore, the manufacturing cost can be reduced and an inexpensive product can be provided.

  FIG. 8 shows an embodiment of a method for manufacturing a composite wood structure material according to the present invention. This method for manufacturing a composite wood structure material is a composite wood structure according to the second embodiment shown in FIG. This is applied to the manufacture of the material 1.

 That is, first, a plurality of single members 7 are assembled, and the adjacent single members 7 and 7 are joined together via an adhesive, so that two plate-like assembly blocks 20 and 25 having the same shape are formed. One is the first laminated lumber block 20 and the other is the sixth laminated lumber block 25.

  Next, a plurality of dissimilar materials 18 are assembled, and adjacent dissimilar materials 18 and 18 are joined together with an adhesive, and the dissimilar materials 18 that are significantly larger than the dissimilar materials 18 on the outer sides of the dissimilar materials 18 at both ends. Are assembled so that the right end protrudes in the right direction, and both dissimilar materials 18 and 18 are joined together with an adhesive, and further, the outer dissimilar materials 18 have the same width as the inner dissimilar material 18 outside. The single members 7 are assembled together, and the single members 7 and the dissimilar materials 18 are joined together through adhesives to form plate-like assembled material blocks 21 and 24 having the same shape, Is the second laminated lumber block 21, and the other is the fifth laminated lumber block 24.

  Next, a plurality of single materials 7 larger than the single material 7 of the first and sixth laminated material blocks 20 and 25 are assembled together, and the adjacent single materials 7 and 7 are joined together with an adhesive, The dissimilar material 18 having a width smaller than that of the single material 7 is assembled outside the single material 7 so that both end surfaces in the width direction are recessed inwardly of the single material 7. A plurality of single members 7 having the same width as the inner single member 7 are assembled on the outside of the outer dissimilar material 18, respectively. And two adjacent single members 7 and 7 are bonded to each other via an adhesive to form two plate-like laminated material blocks 22 and 23 having the same shape, and one of them is a third laminated material block 22. The other is a fourth laminated lumber block 23.

  And the 1st laminated wood block 20, the 2nd laminated wood block 21, the 3rd laminated wood block 22, the 4th laminated wood block 23, the 5th laminated wood block 24 (opposite direction to the 2nd laminated wood block 21), the 6th The laminated lumber blocks 25 are assembled in that order. In this case, the dissimilar material 18 is interposed between each dissimilar material 18 of the third laminated material block 22 and each dissimilar material 18 of the fourth laminated material block 23.

  And between the 1st laminated wood block 20 and the 2nd laminated wood block 21, between the 2nd laminated wood block 21 and the 3rd laminated wood block 22, the 3rd laminated wood block 22 and the 4th laminated wood block 23, In the meantime, the fourth laminated material block 23 and the fifth laminated material block 24 and the fifth laminated material block 24 and the sixth laminated material block 26 are joined together via an adhesive, respectively.

  In this case, the first laminated material block 20 and the second laminated material block 21 and the fifth laminated material block 21 and the sixth laminated material block 22 are respectively integrated with each other through an adhesive having low heat resistance. Bonding is performed, and an adhesive layer (not shown) made of an adhesive having low heat resistance is formed between them.

  In addition, between the dissimilar material 18 outside the second laminated material block 21 and the single material 7, between the dissimilar material 18 of the third laminated material block 22 and the single material 7 outside, the different types of the fourth laminated material block 23. Between the material 18 and the outer single material 7 and between the dissimilar material 18 outside the fifth laminated material block 24 and the single material 7 are also integrally joined via an adhesive having low heat resistance, and between them. Also, an adhesive layer (not shown) made of an adhesive having low heat resistance is formed.

  In this way, as shown in FIG. 2, the inner layer 2 having a substantially rectangular cross section is provided in the central portion, and the non-circular section 27 having a substantially square annular shape is provided outside the inner layer 2 so as to surround the inner layer 2. Thus, the composite wood structure material 1 having a substantially rectangular cross-section in which the outer layer 10 having a substantially square annular cross-section is provided so as to surround the burnout portion 27 is manufactured.

  In the above case, the different material 18 and the single material 7 of the second laminated material block 21 may be joined to the first laminated material block 20 while leaving the first laminated material block 20. In addition to the above method, the outer layer 10 is disposed outside the inner layer 2 so as to surround the inner layer 2, and an adhesive layer made of an adhesive having low heat resistance at or near the boundary between the inner layer 2 and the outer layer 10. Any method can be used as long as 15 can be arranged. Furthermore, in the above description, the composite wooden structure material according to the present invention is applied to a pillar of a wooden building, but it may be applied to a beam, a wall, a floor, etc., and in that case, the same function and effect It plays.

It is the top view which showed 1st Embodiment of the composite wood structure material by this invention. It is the top view which showed 2nd Embodiment of the composite wood structure material by this invention. It is the top view which showed 3rd Embodiment of the composite wood structure material by this invention. It is the top view which showed 4th Embodiment of the composite wooden structure material by this invention. It is the top view which showed 5th Embodiment of the composite wood structure material by this invention. It is the top view which showed 6th Embodiment of the composite wood structure material by this invention. It is the top view which showed 7th Embodiment of the composite wood structure material by this invention. It is the top view which showed one Embodiment of the manufacturing method of the composite wooden structure material by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Composite wood structure material 2 Inner layer 3 Burning margin boundary part at the time of fire end 6 Glued material block 7, 12, 19 Single material 8, 13 Joint part 10 Outer layer 11 Glued material block 15 Adhesive layer which consists of adhesive with low heat resistance 18 Dissimilar materials 19 Single material 20 First laminated wood block 21 Second laminated wood block 22 Third laminated wood block 23 Fourth laminated wood block 24 Fifth laminated wood block 25 Sixth laminated wood block 26 Load support portion 27 Burn-in stop portion 28 Burning allowance

Claims (4)

An inner layer made of a laminated material block formed by assembling a plurality of single materials made of wood or different materials, and an outer layer made of a single material made of wood or different materials or a laminated material block made of a plurality of the single materials. A composite wood structure,
An adhesive layer made of an epoxy resin adhesive, an isocyanate resin adhesive, or a urethane resin adhesive as an adhesive with low heat resistance is provided at or near the boundary between the inner layer and the outer layer,
The composite wood structure material , wherein the plurality of single materials constituting the integrated material block in the inner layer are bonded by a resorcinol resin adhesive as an adhesive having high heat resistance .   2. The composite wood structure material according to claim 1, wherein the inner layer includes a load supporting portion sufficient to support a long-term load, and the outer layer includes a burning allowance portion. A plurality of single materials made of wood or different materials are assembled, and a single laminated material block is formed by joining adjacent single materials so that the laminated direction of the single material is the same or different. A method for producing a composite wood structure material that forms an inner layer and an outer layer by joining together a plurality of adjacent laminated material blocks,
An adhesive layer made of an epoxy resin adhesive, an isocyanate resin adhesive, or a urethane resin adhesive as an adhesive with low heat resistance is provided at or near the boundary between the inner layer and the outer layer,
A method for producing a composite wood structure material, comprising: bonding a plurality of the single materials constituting the integrated material block in the inner layer with a resorcinol resin adhesive as a heat-resistant adhesive . The said inner layer contains the load support part sufficient to support a long-term load, and the said outer layer contains a burning allowance part, The manufacturing method of the composite wood structure material of Claim 3 characterized by the above-mentioned.

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