Woody material

Abstract

To provide woody material excellent in fire resistance performance allowing problems on fire resistance performance of previous woody material to be solved, in which the previous woody material is configured by adhering a plurality of laminated pieces of lumber to each other using adhesive, and is essentially wood required to be assembled with other fireproof material upon application.SOLUTION: Woody material 1 is composed by laminating and adhering lumber 2 and fireproof material 3 using adhesive or alternatively laminating lumber 2 and fireproof material 3 to adhere contact surfaces of the lumber 2 and the fireproof material 3 to each other using adhesive.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a wood material having improved fire resistance. [Background technology]

[0002] BACKGROUND ART Wood materials are known as processed products that are constructed by laminating a plurality of lumber sheets and bonding them together with an adhesive. That is, wood materials are products made by breaking wood into small pieces, adding adhesive, and molding (pressing) them. Known examples of wood materials include Cross Laminated Timber (hereinafter referred to as "CLT") (see Patent Document 1), laminated timber, Laminated Veneer Lumber (hereinafter referred to as "LVL"), and plywood. CLT and laminated timber are made by stacking and gluing together multiple laminates made from sawn logs. LVL and plywood are made by laminating and gluing together multiple sheets of veneer that have been cut from logs with a saw blade. The above-mentioned wood material is used, for example, as a wood material provided on the outer periphery of a steel pipe via a fire-resistant covering material (see Patent Document 2), or as a finishing wood layer corresponding to the burning margin portion in a wood fire-resistant component (see Patent Document 3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-60907 [Patent Document 2] Patent Publication No. 2021-177055 [Patent Document 3] Patent Publication No. 2021-38655 Summary of the Invention [Problem to be solved by the invention]

[0004] The conventional wood materials described above are made by laminating multiple pieces of lumber together with an adhesive, and because they are essentially wood, they need to be used in combination with a separate fire-resistant material, which poses issues in terms of fire resistance. The present invention provides a wood material with excellent fire resistance. [Means for solving the problem]

[0005] The wood material according to the present invention is characterized in that it is constructed by laminating lumber and fire-resistant material and bonding them together with an adhesive. The wood material according to the present invention is characterized in that it is constructed by alternately laminating lumber and fire-resistant material, with the contact surfaces of the lumber and the fire-resistant material being bonded together with an adhesive. It is also characterized in that the lumber is constructed by stacking three or more layers. The lumber is a sawn board, and the fire-resistant material is a fire-resistant sheet. The fire-resistant material is characterized in that it is a fire-resistant sheet having a plurality of through holes for allowing the adhesive to pass through. The adhesive is characterized by being a fire-resistant adhesive. According to the present invention, it is possible to provide a wood material with excellent fire resistance. [Brief explanation of the drawings]

[0006] [Figure 1] 1A and 1B are diagrams showing a wood material, in which (a) is an exploded perspective view and (b) is a perspective view (Embodiment 1). [Figure 2] Cross-sectional view of a wood material (embodiment 1). [Figure 3] FIG. 10 is a perspective view showing a fire-resistant sheet (Embodiment 2). [Figure 4] Cross-sectional view of wood material (embodiment 2). DETAILED DESCRIPTION OF THE INVENTION

[0007] Embodiment 1 As shown in Figures 1 and 2, the wood material 1 of embodiment 1 is a product constructed by alternately stacking lumber 2 and fire-resistant material 3, with the contact surfaces of the lumber 2 and the fire-resistant material 3 being bonded together with an adhesive 4. The lumber 2 is, for example, a laminated board. The fire-resistant material 3 is, for example, a fire-resistant sheet.

[0008] The wood material 1 is formed by laminating, for example, three or more layers of lumber 2. That is, the wood material 1 has a structure of, for example, three or more layers of sawn boards as lumber 2, and a structure of five or more layers in which fire-resistant sheets as fire-resistant material 3 are provided between the sawn boards. 1 and 2 show an example of a five-layered wood material 1 in which sawn boards have a three-layered structure and fire-resistant sheets are provided between the sawn boards.

[0009] In other words, as shown in Figure 2, the wood material 1 is a wood material produced by placing a fire-resistant sheet (fire-resistant material 3) between the surface of one adjacent sawn board (lumber 2) and the surface of the other sawn board, and by bringing the surfaces of the sawn boards and the sheet surface of the fire-resistant sheet into surface contact and bonding them together with adhesive 4.

[0010] That is, the wood material 1 according to the first embodiment has a structure in which, for example, multiple sawn boards are stacked so that the grain directions of the boards are perpendicular, similar to CLT, or a structure in which, for example, multiple sawn boards are stacked so that the grain directions of the boards are parallel, similar to laminated lumber.

[0011] The fire-resistant sheet may be made of, for example, meta-aramid fiber, para-aramid fiber, PBO fiber, polyamide-imide fiber, PBI fiber, or the like.

[0012] In the wood material 1 according to embodiment 1, for example, sawn boards having a thickness of 30 mm, 12 mm, or 10 mm are used as the lumber 2, and fire-resistant sheets having a thickness of approximately 1 mm or less are used as the fire-resistant material 3. Therefore, compared to CLT or laminated timber, the laminated thickness of the wood material 1 is only a few mm thicker, so according to embodiment 1, it is possible to provide a wood material 1 that is the same size as CLT or laminated timber and has excellent fire resistance, with the fire resistance performance improved by the fire-resistant sheet.

[0013] That is, according to the wood material 1 of embodiment 1, it is possible to provide a wood material 1 similar to CLT, which has excellent fire resistance due to the inclusion of a fire-resistant sheet, or a wood material 1 similar to laminated timber, which has excellent fire resistance due to the inclusion of a fire-resistant sheet.

[0014] Furthermore, the wood material provided on the outer periphery of the steel pipe via a fire-resistant covering material as disclosed in Patent Document 2 and the finishing wood layer disclosed in Patent Document 3 must be used in combination with a separate fire-resistant material, which increases the size of the fire-resistant structure and increases construction costs, etc. The wood material 1 according to the first embodiment has excellent fire resistance, eliminating the need to use it in combination with a separate fire-resistant material, thereby enabling the fire-resistant structure to be made smaller and less expensive.

[0015] Embodiment 2 As shown in FIGS. 3 and 4, the fire-resistant material 3 is a fire-resistant sheet material having a plurality of through holes 3a, 3a . . . for allowing the adhesive 4 to penetrate therethrough. The plurality of through holes 3a, 3a... are formed so as to penetrate the sheet surface of the fire-resistant sheet material, and are formed, for example, at predetermined intervals. The through holes 3a are through holes having a diameter of, for example, 1 mm or less, and the interval (pitch) between adjacent through holes 3a, 3a is set to approximately 100 mm or less. The plurality of through holes 3a, 3a . . . may be formed by punching or the like.

[0016] According to the wood material 1 of embodiment 2, the sawn boards can be bonded together using the adhesive 4 filled into the multiple through holes 3a, 3a..., thereby improving the adhesive strength bonding the sawn boards together and making it possible to produce high-quality wood material 1. Furthermore, by making the through holes 3a 1 mm or less in diameter, it becomes difficult for fire to pass through the through holes 3a, and therefore it is possible to provide a wood material 1 with excellent fire resistance.

[0017] Embodiment 3 As the adhesive 4, a fire-resistant adhesive was used. That is, a fire-resistant adhesive is used as the adhesive 4 constituting the wood material 1 described in the first and second embodiments. According to the wood material 1 of the third embodiment, a fire-resistant adhesive is used as the adhesive 4, thereby making it possible to provide a wood material 1 with even better fire resistance.

[0018] Embodiment 4 The lumber 2 may be a veneer. That is, the wood material 1 of embodiment 4 is manufactured to have a structure of, for example, three or more layers of veneer as lumber 2, and a structure of five or more layers in which fire-resistant sheets as fire-resistant material 3 are provided between the veneers. In other words, the wood material 1 may be a wood material 1 produced by interposing a fire-resistant sheet between the surface of one adjacent veneer and the surface of the other adjacent veneer, bringing the surfaces of the veneer and the surface of the fire-resistant sheet into surface contact and bonding the surfaces of the veneer and the surface of the fire-resistant sheet together with adhesive 4.

[0019] In the wood material 1 according to the fourth embodiment, for example, the veneer used as the lumber 2 has a thickness of 0.6 to 3 mm, and the fire-resistant sheet used as the fire-resistant material 3 has a thickness of about 1 mm or less. Therefore, according to the fourth embodiment, it is possible to provide a wood material 1 having improved fire resistance compared to LVL and plywood.

[0020] Furthermore, in the wood material 1 of embodiment 4, by using a fire-resistant sheet material having multiple through holes 3a, 3a... as described in embodiment 2, the adhesive strength between veneers is improved, making it possible to produce a high-quality wood material 1. Furthermore, if the fire-resistant adhesive 4 described in the third embodiment is used in the wood material 1 according to the fourth embodiment, a wood material 1 with even better fire resistance can be provided.

[0021] According to the wood material 1 of the fourth embodiment, it is possible to provide a wood material 1 similar to LVL, which has excellent fire resistance, or a wood material 1 similar to plywood, which has excellent fire resistance.

[0022] In addition, in embodiments 1 to 4, an example of a wood material 1 is shown in which lumber 2 and fire-resistant material 3 are alternately layered and the contact surfaces of the lumber 2 and the fire-resistant material 3 are bonded together with adhesive 4, but the wood material 1 of the present invention does not necessarily have to be formed by alternately layering the lumber 2 and the fire-resistant material 3. For example, the fireproof material 3 may be laminated every time a plurality of lumber sheets 2 are laminated. In other words, the wood material 1 according to the present invention may be configured to include at least one layer of fire-resistant material 3. That is, the wood material 1 according to the present invention may be any wood material constructed by laminating lumber 2 and fireproof material 3 and bonding them together with adhesive 4.

[0023] The fire-resistant material 3 may be a metal plate such as an iron plate or a metal sheet such as an aluminum sheet. [Explanation of symbols]

[0024] 1. Wood materials, 2. Lumber, 3. Fireproof materials, 4. Adhesives.

Claims

1. A wood material characterized by being constructed by laminating lumber and fire-resistant material and bonding them together with an adhesive.

2. A wood material characterized in that lumber and fire-resistant materials are alternately laminated and the contact surfaces of the lumber and fire-resistant materials are bonded together with an adhesive.

3. 3. The wood material according to claim 1 or 2, characterized in that the wood is constructed by laminating three or more layers of lumber.

4. 3. The wood material according to claim 1, wherein the lumber is a sawn board and the fire-resistant material is a fire-resistant sheet.

5. 3. The wood material according to claim 1, wherein the fire-resistant material is a fire-resistant sheet having a plurality of through holes for allowing an adhesive to pass through.

6. 3. The wood material according to claim 1, wherein the adhesive is a fire-resistant adhesive.

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