Refractory wall

Abstract

To provide a wooden fireproof wall material with excellent fire resistance capable of preventing fire spread with a simple structure.SOLUTION: Provided is a fireproof wall material using a fireproof layer formed of fire proof materials as a center layer, and provided with wooden layers serving as wall support parts, on both faces thereof.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to fireproof technology. For example, it relates to a fireproof wooden structural wall provided between dwelling units in an apartment house.

Background Art

[0002] Wood is a familiar material and has been used in the construction of houses and the like since ancient times. The forest resources planted after the war have also been enriched. The use of wood in buildings is attracting attention as a means of maintaining the forest cycle and countermeasures against carbon dioxide. The use of wood for wall materials can increase the usage amount (carbon dioxide fixation amount) because of the large area, and can also exhibit the design property of wood. However, in walls (such as fire compartments) where fire resistance is required, since wood, which is a combustible material, has difficulty in fire resistance, it is often used only as a finish on the surface of a wall made of reinforced concrete, which is a non-combustible material. Recently, there has been proposed a structural material or wall material in which a fireproof layer is provided on the surface side of a thick wood that serves as a load-bearing part, and wood is attached to the surface thereof to increase the usage ratio of wood.

[0003] Some conventional proposals regarding flammability countermeasures will be introduced. Patent Document 1 (International Publication No. 2005 / 019551) discloses a wall structure made of wood, which includes a plurality of wooden wall units 20 placed on a horizontally arranged base 10 (or foundation), the wooden wall units 20 having a thickness greater than or equal to the fire-retardant thickness in the direction perpendicular to the wall surface, a lower fixing member 100 for fixing the wooden wall units to the base 10, a connecting member 100 for connecting the wooden wall units to prevent relative vertical movement and movement in the direction perpendicular to the wall surface between the wooden wall units, an airtight means 50 provided over the entire vertical length on the opposing surfaces 22, 23 at the connecting part between the wooden wall units to maintain airtightness between the opposing surfaces, and an upper fixing member 100' for fixing the wooden wall units to a cross member 60 arranged above the wooden wall units. This invention is an invention for forming a thick wooden layer so as to leave a residue after burning. Patent Document 2 (Japanese Patent Publication No. 2019-90270) discloses a wall structure comprising: a first fire-resistant wooden panel member 30 having a wooden load-bearing layer 34 and a fire-resistant covering layer 36 provided on the outside of the load-bearing layer; and a second fire-resistant wooden panel member 32 having a wooden load-bearing layer 42 and a fire-resistant covering layer 44 provided on the outside of the load-bearing layer, and being positioned opposite the first fire-resistant wooden panel member at a distance from it. This wall structure has fire-resistant layers provided on both outer surfaces of the load-bearing layer, with fire-resistant wooden members provided on the outside thereof. Patent Document 3 (Japanese Patent Publication No. 2007-39915) discloses a partition wall in which two gypsum boards are attached to both sides of a wood-based substrate 11 made of wood material, with an aluminum layer provided between the gypsum boards. Patent Document 4 (Japanese Unexamined Patent Publication No. 2008-238421) discloses a fire-resistant building board material in which a wood fiberboard is attached to a gypsum board so that a processed portion is formed. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] International Publication No. 2005 / 019551 [Patent Document 2] Japanese Patent Publication No. 2019-90270 [Patent Document 3] Japanese Patent Publication No. 2007-39915 [Patent Document 4] Japanese Patent Publication No. 2008-238421 [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] The present invention aims to develop a wood-based fire-resistant wall material that has a simple structure, can prevent the spread of fire, and has excellent fire resistance. [Means for solving the problem]

[0006] This is a wood-based fire-resistant wall material with a fire-resistant layer as the central layer, and wood layers on both sides that serve as wall support sections. 1. A fire-resistant wall material having a fire-resistant layer made of fire-resistant material as the central layer, with wood layers on both sides that serve as wall support sections. 2. The fire-resistant wall material according to 1, characterized in that the fire-resistant material and the wood material are fixed together with linear members, and the linear members are embedded in the wood layer. 3. The fire-resistant wall material according to 2., characterized in that each of the wood layers on one side is bonded to the fire-resistant material with a separate linear material. 4. The fire-resistant wall material according to 1, characterized in that the fire-resistant material is formed of a hardened layer of dry-type fire-resistant board material or inorganic filler material, which is laminated in multiple layers. 5.1. or 2. A fire-resistant wall structure in which the fire-resistant wall material described in 5.1. or 2. is joined to a frame, A fire-resistant wall structure characterized in that each wooden component is joined to a beam member and / or column member that forms the frame. 6. The beam members and / or column members are H-shaped steel, The fire-resistant wall structure according to 5., characterized in that each of the wood materials is joined to the flange of the H-shaped steel with a linear material. 7. The fire-resistant wall structure described in 6, characterized in that the wooden members provided on both sides each serve as load-bearing parts. 8. Insert the linear material through the fire-resistant material from the fire-resistant material side so that the tip remains inside the wood board, and fix both together to form two fire-resistant wall materials for one side. A method for manufacturing the fire-resistant wall material described in 2., wherein two wood-based fire-resistant wall materials for one side are joined together with adhesive, and the central layer consists of two fire-resistant materials with wood layers on both sides that serve as wall supports. 9. Insert a linear material through one side of two wooden boards, with the end slightly raised and the tip remaining inside the wooden board. Place wooden boards opposite each other with a gap between the head ends of the linear material. A fluid inorganic filler is filled into the gap. The inorganic filler is cured, A method for producing the fire-resistant wall material described in 4, wherein the central layer is formed of a hardened layer of inorganic filler, and wood material is provided on both sides thereof. 10. A method of constructing a fire-resistant wall structure by joining the building frame and the wood layers provided on both sides of the fire-resistant wall material described in 1. by inserting linear members in the thickness direction of the wood layers. [Effects of the Invention]

[0007] 1. By forming a wall material with a fire-resistant material in the central layer and wooden layers on both sides that serve as wall supports, the structure is simple, and even if one side of the wooden layer is damaged, the other side remains supported by columns and beams, allowing it to survive as a shielding wall. In particular, as a wall material between dwelling units, it is an excellent material for preventing the spread of fire between adjacent rooms and is suitable for wooden high-rise buildings and apartment buildings. Fire-resistant wall materials have excellent fire resistance and can be used as building wall materials such as structural wall materials, load-bearing wall materials, and earthquake-resistant wall materials. 2. The wood material has sufficient thickness to support the wall and thus forms a combustible layer. However, because it also has sufficient thickness on the other sides, a carbonized layer forms in the unburnt portion, providing insulation, which protects the central fire-resistant layer and improves fire resistance. 3. Since the wood layer and the fire-resistant material are fixed together with linear members, the wood layer will not detach from the fire-resistant material even in the event of a fire, thus allowing the fire-resistant material to perform its protective function. Furthermore, with thick wood materials, the fixing linear members can be contained within the wood, preventing heat from the fire from spreading from the linear members into the interior. The linear bonding of the wood layer and the fire-resistant material has the following functions: (a) When the fire-resistant material and one side of the wood layer are bonded with a linear material, it prevents heat from being transferred to the other side through the linear material; and (b) The linear material inserted through both sides of the wood layer prevents the two sides from separating. When fire-resistant boards are used, an adhesive or metal plate can be interposed between them to prevent the boards from separating and falling off in the event of a fire, thereby maintaining the fire resistance on the non-fire side. 4. The wood layer is a thick layer that can be supported by beams and columns, and can be made of wood materials such as wooden boards, laminated timber, CLT, or plywood. These wood materials can be used to form structural members and left exposed. Alternatively, decorative materials can be applied to the surface. 5. The refractory material can be a filler formed by filling a central layer portion with a plate material such as a gypsum board or a hydraulic inorganic material such as fluid gypsum or mortar and curing it. Since the gypsum board or the like is formed to have a certain thickness for standard fire resistance, the required number of sheets can be used. The filler can be formed into an arbitrary thickness and an arbitrary shape such as a curve. The filled refractory layer has good adhesion to the wooden layer, is resistant to peeling of the carbonized wooden layer, and can improve the fire resistance function. Also, since there is no need to create joints, heat propagation through the joints can be prevented. A metal plate or fire-retardant treated wood can also be added to the refractory layer. 6. Since the wall structure of the present invention joins each of the wooden layers provided on both sides to a beam, a column, or the like, even if one of the wooden layers is burned out, the wall structure can be sufficiently maintained by only the joints on one side. The fire-resistant wall material of the present invention can be manufactured in a factory or the like and transported to a construction site. Therefore, it is lighter than a reinforced concrete wall and has excellent workability. 7. When the column or beam is made of H-shaped steel, the flanges of the H-shaped steel can be connected to the wooden layers on both sides. After a disaster, the connection of one of the wooden layers remains, and the function of the fire-resistant wall can be exhibited. By interposing an inorganic fire-resistant agent such as mortar or gypsum between the flange of the upper beam material and the wooden fire-resistant wall material, heat from a fire is prevented from entering. The lower part can be prevented by a floor slab. Note that the H-shaped steel beam material is subjected to necessary fire-resistant treatment such as fire-resistant coating. 8. The combination of the refractory material and the wooden layer material can be selected for each side. The design properties of the left and right rooms can be adjusted.

Brief Description of the Drawings

[0008] [Figure 1] A diagram showing a cross-sectional example of a wooden fire-resistant wall material [Figure 2-1] A diagram showing an example of a wooden fire-resistant wall structure [Figure 2-2] A diagram showing a cross-sectional example of a wooden fire-resistant wall structure [Figure 3] A diagram showing a manufacturing method of a wooden fire-resistant wall material [Figure 4]Figure showing another manufacturing method of a wood-based fireproof wall material [Figure 5] Figure showing the types of wood-based fireproof wall materials [Figure 6] Figure showing the situation during a fire [Figure 7] Figure showing a conventional example of Patent Document 2

Embodiments for Carrying out the Invention

[0009] The present invention relates to an invention of a wood-based fireproof wall. It is a wood-based fireproof wall material having a fireproof layer as a central layer and wood layers serving as wall support parts provided on both sides thereof respectively. By forming a wall material having a fireproof material in the central layer and wood layers serving as wall support parts provided on both outer sides thereof respectively, the structure is simple, and even if one-sided wood layer is damaged by a disaster, it can be supported by the one-sided wood layer on the opposite side, so that it can sufficiently function as a fireproof wall structure. In particular, as a wall material at the boundary of a living room, it becomes a wall material excellent in preventing the spread of fire between adjacent rooms and is suitable for high-rise wooden buildings and apartment houses. The present invention can form a fireproof wall material, a structural wall material, and a shear wall material excellent in fire resistance, and a fireproof wall structure of a building can be constructed using these wall materials.

[0010] Fig. 1 shows an example of the cross-section of a wood-based fireproof wall material. Inside two wood-based plates 1a and 1b, a fireproof material 2 is laminated, and a fireproof wall material 100 is formed by being integrated with a linear material 32 through the cross-section. The linear material 32 is a bolt, nut, screw, etc. A partial enlarged view is shown in (b). Fireproof materials 2a and 2b are fixed to the wood-based plates 1a and 1b with a linear material 31 made of screws, nails, etc., and left and right fireproof wall materials 100a and 100b are formed. These left and right fireproof wall materials 100a and 100b are adhered with an adhesive 35. A fireproof wall material 100 that penetrates the linear material 32 not shown in this partial enlarged view and is firmly integrated is formed. The linear member 31 is inserted through one fire-resistant material towards the wood-based board with a screw or similar fastener, with the tip remaining inside the wood. The linear member 32 has a through hole in the fire-resistant wall material and fastens the wood-based boards on both sides with bolts and nuts. In this case, the bolts and nuts are placed inside the wood, and the hole is plugged with a sealing material. This treatment of the linear members 31 and 32 prevents heat from being conducted to the interior during a fire.

[0011] This example shows a combination of dry fire-resistant materials such as gypsum board and wood such as CLT. As a fire-resistant material, it can also be formed by filling and hardening it with fluid materials such as gypsum. In this example, a heat-resistant adhesive layer is provided to prevent the fire-resistant materials 2a and 2b from peeling off. However, a thin space layer can also be provided to improve heat insulation and sound insulation. The wood-based boards that form the wall support can be used as the wall surface as is, or a finishing material can be added.

[0012] <Wood wall support part> The wall support section is the part that is supported and connected to the building's column-beam frame, with each of the wood layers on either side acting as an independent support section. Since the wall support section is connected to the frame with bolts or other fasteners, sufficient thickness is required, and materials such as laminated timber, CLT, thick plywood, and sawn timber are used. Because it has thick material on both sides, it can be given functions such as a fire-resistant combustible layer, load support, shear wall, and seismic wall. In this invention, even if the wood layer on one side is destroyed by fire, the fire-resistant material exhibits its fire-resistant properties, leaving the other side intact. Since the wood layer on the other side is joined to the columns and beams, it functions as a fire-resistant wall, preventing the fire from spreading to the other side. Because wood varies from log to log, laminated timber is suitable for ensuring a consistent strength across the wood layers. Laminated timber can also be designed in terms of thickness and length. In this invention, laminated timber also includes CLT (Cross Laminated Timber) and LVL (Laminated Veneer Lumber). The wooden wall support section, made from laminated timber, can achieve a width and thickness that allows it to be supported by the building's structure (e.g., roof, beams, columns, walls, floors, etc.), and can be used as a long wall material. The design of the shape of the structural material used as columns and beams is flexible. The wood used includes coniferous trees commonly used in construction, such as cedar, pine, larch, cypress, hemlock, American cypress, and Douglas fir, as well as broad-leaved trees such as zelkova and beech. The carbonization rate of wood is generally said to be 0.6 mm / minute, meaning that 36 mm will burn away in one hour, and at least 72 mm will burn away in two hours. This burning rate can be utilized for fire resistance. In the fire-resistant wall material of the present invention, since the fire-resistant layer is in the central layer, even if the wood layer on one side becomes a burning layer, the fire is blocked by the fire-resistant layer, and the load can be supported by the remaining wall support on the other side, thus preventing the wall from collapsing. Even if the thickness of the wood layer on one side is less than 72 mm, sufficient fire resistance for two hours can be achieved. Alternatively, while fire-resistant materials such as gypsum board exhibit a predetermined fire resistance, in this invention, the thick wooden wall support section carbonizes and exhibits fire resistance, so the fire-resistant material remains unexposed, maintaining high fire resistance.

[0013] <Fireproof layer> The fire-resistant layer is formed from fire-resistant material. Fire-resistant materials should be inorganic materials that are non-combustible. Materials mainly composed of gypsum, mortar, and concrete can be used. Gypsum, mortar, and concrete are non-combustible and have insulating properties. Because they contain water such as crystalline water, when exposed to heat, the water evaporates, suppressing the rise in temperature and thus reducing the heating of the wood-based wall support structure. These materials can be used in both dry and wet form. Dry materials include gypsum board, for example. Wet materials are fluid materials such as gypsum or mortar, which are filled between the spaced wood layers and allowed to harden. Furthermore, a fire-resistant layer can be created by interposing materials such as metal plates, flame retardants, flame-retardant treated wood, or calcium silicate boards. For dry construction, the simplest way to determine the thickness of the fire-resistant layer is to use one, two, or any number of commercially available gypsum boards as needed. In the wet process, the material can be designed to any thickness that provides the required fire resistance. When forming a fire-resistant layer using a wet method, if there is a risk of the wood layer absorbing moisture and expanding, a film or moisture-proof paper can be interposed.

[0014] <Integration means> The wood-based fire-resistant wall material of the present invention incorporates a means for integrating the left and right wood-based board materials. When using dry materials such as gypsum board as fire-resistant material, the integration method involves first fixing the gypsum board to the wood-based board with screws or similar fasteners to form one side of the fire-resistant wall. Then, the two sides of the fire-resistant wall are joined together with adhesive. Alternatively, bolts can be driven through from both sides and sewn together for fixation. Another method involves using both adhesive and bolts. It is also possible to improve heat insulation and sound insulation by creating a space in the center without direct contact between the two sides. A heat-resistant adhesive is suitable. Heat-resistant adhesives maintain their adhesion even during a fire, preventing the gypsum board from peeling off and falling towards the fire side, thus maintaining high fire resistance. In the wet method, screws are driven into the inner surface of the wood-based board with the heads slightly raised to form studs. The exposed screw heads on both sides of the wood-based boards are then filled and hardened with plaster or similar material to create a unified structure. Furthermore, it can also be secured with through bolts.

[0015] The fire-resistant wall material of this invention can be manufactured in a factory and assembled on-site. Because it is primarily made of wood, it is lightweight and easy to install. Of course, it can also be constructed on-site by combining wood-based boards with the fire-resistant material.

[0016] <Wall structure> The fire-resistant wall structure of the present invention is formed by joining the wooden layer, which serves as the wall support for the fire-resistant wall material, to structural members such as columns and beams. By using the fire-resistant wall material of the present invention, it is possible to construct a wall that is excellent at preventing the spread of fire to adjacent rooms or adjacent dwelling units. Since safety against fire and independence from adjacent units can be ensured, it is possible to construct high-quality wooden buildings. Furthermore, it can contribute to the use of wood in buildings where safety is important, such as public facilities and schools. Furthermore, it can be applied to structural wall materials for buildings, such as structural walls, earthquake-resistant walls, and load-bearing walls.

[0017] Figure 2-1 shows examples of wood-based fire-resistant walls. An example where it is connected to a column-beam frame is shown in (a), and an example where it is connected to a column is shown in (b). (a) is a typical column-beam frame, and the illustration shows an example where the upper and lower beams (the lower side may be the floor) and the left and right columns are joined by connecting means. In the illustration, the frame is formed by the upper beam 52, the lower beam 51 (which can also be a floor slab 53), and the columns 54, 54 on both sides, and the beams and columns on all four sides and the fire-resistant wall material 100 are joined by linear members 34 to form a fire-resistant wall structure 200. This diagram illustrates that the frame can be joined from columns or beams, and joining from columns or beams is sufficient. In addition, as shown in (b), the fire-resistant wall material 100 has wood-based boards 1a and 1b joined to both sides of the fire-resistant material 2, and the linear members 34 are joined to the wood-based boards 1a and 1b respectively. (b) shows an example of joining the fire-resistant wall material 100 to the columns 54, 54. The wood-based panels 1a, 1b on both sides that make up the fire-resistant wall material 100 are joined to the columns 54, 54 with linear members 34, 34... The linear members 34 are inserted in the thickness direction of the wood-based boards 1a and 1b and are not visible on the wall surface. This is to prevent heat from being transferred through the linear members. Fireproofing treatment can be applied to the joints, and further fireproofing treatment can be carried out. Although this diagram shows fire-resistant wall materials being directly joined to columns and beams, standard jigs and intermediary tools used for joining wall materials can be used.

[0018] Figure 2-2 shows a cross-sectional example of a wood-based fire-resistant wall structure. This example is a fire-resistant wall structure 200 constructed using H-shaped steel beams and the fire-resistant wall material 100 disclosed in Figure 1. The fire-resistant wall material 100 is installed between the reinforced concrete floor slab 53, which is constructed on the lower beam 51, and the upper beam 52. The left and right flanges of the H-shaped steel that form the upper and lower beams and the left and right wood-based panels 1a and 1b that make up the fire-resistant wall material 100 are connected by linear materials 34 such as screws. Since the left and right wood-based panels 1a and 1b are independently supported by the beam made of H-shaped steel, even if one side is destroyed by fire, the other wood-based panel remains and the wall structure can continue to exist without collapsing. Furthermore, a gap is provided between the upper beam 52 and the fire-resistant wall material 100, and a layer of inorganic filler material 71 such as mortar is provided. This inorganic filler 71 serves as a fireproofing coating to protect the H-shaped steel beam from heat if one of the wood-based panels burns down in a fire. The gaps for the inorganic filler 71 also serve as adjustment spaces to facilitate the assembly of the wood-based panels, which change dimensions due to moisture absorption, during construction. The lower beam 51 is insulated from the heat of the fire by the floor slab. The flange of the beam and the fire-resistant wall material 100 are joined by screws or the like, which provides shear resistance and contributes to earthquake resistance. Furthermore, since the left and right wood-based panels 1a and 1b are independently supported by the H-shaped steel beam, even if one side is destroyed by fire, the other side remains, making it possible to construct a fire-resistant wooden building.

[0019] <Manufacturing method> The manufacturing of wood-based fire-resistant wall materials can employ various methods, including mechanical integration by connecting with bolts from both sides, integration by bonding with adhesive, and fill integration by filling with fire-resistant material. Figure 3 shows an example of the manufacturing process for wood-based fire-resistant wall materials. This manufacturing example uses wood-based boards 1a and 1b as wall supports, fire-resistant materials 21a and 21b made of gypsum board, wire-shaped screws 31a and 31b, adhesive 35, through bolts, wire-shaped nuts 32, and sealing material 36.

[0020] First, as shown in (a), a wood-based board material 1a, a fire-resistant material 21a, and a linear material 31a are prepared. Next, in (b), the linear material 31a is driven into the fire-resistant material 21a, and the fire-resistant material is attached to the wood-based board material 1a to manufacture one of the fire-resistant wall materials 100a. The other fire-resistant wall material 100b is manufactured in the same way. Then, in (c), adhesive 35 is applied to one of the fire-resistant materials of the left and right fire-resistant wall materials 100a and 100b. The adhesive can be applied by means of a brush, spray, double-sided tape, etc. In (d), the left and right fire-resistant wall materials 100a and 100b are pressed together and bonded. Furthermore, in this example, through holes are made that penetrate the left and right fire-resistant wall materials 100a and 100b, bolts are passed through them, and nuts are fitted to form a linear material 32, which firmly joins the two together. The openings of the through holes are plugged with a plugging material 36. The stopper serves both to slow down heat transfer during a fire and to provide a decorative effect. In this example, adhesive 35 and linear material 32 are used together, but either one of them may be used. This manufacturing process allows for the production of fire-resistant wall material 100 in the factory and its installation on-site, thus ensuring a stable supply of fire-resistant wall material 100 with consistent quality.

[0021] Figure 4 shows the manufacturing method by filling with wood-based fire-resistant wall material. This method involves placing two wood-based boards 1a and 1b opposite each other with a gap equal to the thickness of the fire-resistant material, and then pouring uncured, fluid fire-resistant material into the gap and allowing it to harden. To increase the bonding strength between the fire-resistant material and the wood-based boards, a connecting material such as a stud can be used. Figure 4 shows an example in which such a connecting material is used. First, as shown in (a), the connecting material 37a is driven into the wood-based board 1a so that its head is slightly raised. To increase the bonding strength, the height of the connecting material's head should be at least half the thickness of the fire-resistant material. The connecting material can be T-shaped, V-shaped, U-shaped, etc. For example, a screw can be used for a T-shape, and as shown in the figure, the head of the connecting material 37a is attached so that it is in the middle of the thickness of the fire-resistant material. Next, (b) a wood-based board 1a with a connecting member 37a attached and a wood-based board 1b with a connecting member 37b attached are placed facing each other, and a fluid fire-resistant material is poured into the gap. The distance between the opposing boards is equal to the thickness of the fire-resistant material. Support materials, U-shaped fixing jigs, spacers, etc. can be used on both sides to maintain the position in the opposing position. Dedicated equipment can also be set up for factory production. Connecting members that protrude by the thickness of the fire-resistant material can be provided as spacers. (c) A layer of hardened fire-resistant filling material 22 is formed, completing the fire-resistant wall material 101.

[0022] Wood-based boards used as support structures for wooden walls are used in a state where they are dried below the fiber saturation point. Dimensional changes in wood are affected by moisture content, which can cause dimensional inaccuracies and deformation. It is important to maintain dryness and prevent changes in moisture content. In this fire-resistant material filling method, by providing a watertight layer between the wood-based board material and the fire-resistant material filling, it is possible to suppress the dimensional changes caused by moisture absorption by the wood. The waterproofing layer is installed to prevent water from penetrating from the fire-resistant coating layer to the wooden wall support structure. The waterproofing layer can be formed using paints, films, thin metal materials (metal foils), etc. Suitable waterproofing coatings include oil-based and water-based waterproof paints for wood and water glass, with film-forming types and non-hydrophilic or hydrophobic compositions being appropriate. For example, Xyladecor Conzolan (trade name) is one such example. Suitable film materials include moisture-blocking sheets such as Air-Dry (registered trademark) or waterproof paper.

[0023] Figure 5 shows examples of wood-based fire-resistant wall types. (a) shows a type of wood-based fire-resistant wall material 100 made by laminating dry-type fire-resistant boards. As shown in Figure 3, this is a fire-resistant wall material 100 in which fire-resistant materials 2a and 2b such as gypsum board and wood-based boards 1a and 1b are integrated. If necessary, the left and right fire-resistant materials 2a and 2b are bonded together with adhesive. For this bonding, a heat-resistant adhesive is used so that the left and right fire-resistant materials 2a and 2b do not separate even in the event of a fire. In addition to full bonding, partial bonding is also possible. Alternatively, they can be integrated with a linear material 32 consisting of through bolts and nuts. The left and right fire-resistant wall materials 100a and 100b can be integrated using adhesive, bolts, etc., or either of these methods. Since the required fire resistance and strength can be achieved by laminating commonly available gypsum board and standard CLT, it is easy to manufacture. Furthermore, a space can be created between the left and right fire-resistant wall materials 100a and 100b, which can enhance functions such as heat insulation, sound insulation, and vibration damping.

[0024] (b) shows a fire-resistant wall material 101 made of wood-based material filled with a fire-resistant material, which is formed by filling and hardening a fluid material such as gypsum or mortar. As shown in Figure 4, this fire-resistant wall material 101 has a fire-resistant material 22 that is formed by filling and hardening a fire-resistant material such as gypsum or mortar between two wood-based board materials 1a and 1b on both sides. This fire-resistant wall material 101 is firmly integrated as the fire-resistant layer is filled in. This fire-resistant wall material 101 can be designed into any shape, such as a curved shape. In addition, since the fire-resistant layer can be set to a thickness that satisfies the required strength and fire resistance, it is possible to realize a wall material of the minimum required thickness.

[0025] (c) shows a screw-fastened fire-resistant wall material 102 in which wood-based boards 1a and 1b on both sides and fire-resistant material 2 are integrated with connecting screws 33. This fire-resistant wall material 102 can be integrated by overlapping wood-based boards 1a and fire-resistant material 2 and wood-based boards 1b and driving connecting screws 33 from one side, thus reducing the number of manufacturing steps. Any fire-resistant board can be used for the fire-resistant material 2, such as one or more sheets of gypsum board. The side that is not penetrated by screws is finished neatly. In the illustrated example, a metal plate 23 is sandwiched between the wood-based boards 1a and 1b and the fire-resistant material 2, and the fire-resistant performance of the fire-resistant material is improved by preventing the fire-resistant material from falling out of the metal plate. By leaving the fire-resistant material on the affected side, the overall thickness of the fire-resistant material can be reduced and the degree of screw fastening is improved.

[0026] <Fire Scenario Model> Figure 6 shows the situation during the fire. The wall structure shown in Figure 6 is modeled after the fire-resistant wall structure 200 shown in Figure 2. A fire-resistant wall structure 200 is provided between the upper floor slab 53-2 and the floor slab 53 of the current floor. The wall structure is as described above, so the explanation is omitted. Not mentioned above, the upper beam 52 is provided with fire-resistant coating 73. Note that the fire-resistant coating of the lower beam 51 is not related to the wall structure of the current floor, so it is not shown.

[0027] (a) represents the situation during a fire, and (b) represents the situation after the fire. The room on the side with fire-resistant wall material 100a is designated as the fire-starting side 201, and the room on the side with fire-resistant wall material 100b is designated as the adjacent room side 202. Even if the fire-resistant wall material 100a is destroyed by fire, the fire-resistant wall material 100b remains intact due to the fire-resistant material 2. The fire-resistant wall material 100b can also support a load on its own. Furthermore, since mortar remains beneath the flange of the upper beam 52, the upper beam is not damaged, and the fire does not spread to the fire-resistant wall material 100b. Therefore, the fire-resistant wall structure 200 can maintain its function as a load-bearing wall even after a fire. [Explanation of symbols]

[0028] 1, 1a, 1b Wooden board 2, 2a, 2b refractory material 21a, 21b Fireproof material 22 Filled refractory material 23 Metal plate 31, 32, 34 Wire material 33 connecting screws 35 Adhesives 36. Sealing material 37a, 37b connecting material 51 Lower beam 52 Upper beam 53 Floor slab 53-2 Upper floor slab 54 pillars 6 H-beam steel 61 Flange 71 Inorganic fillers 73 Fire-resistant coating 100, 101, 102 Fire-resistant wall material 200 Fireproof wall structure 201 Fire origin side 202 Adjacent room side

Claims

1. The structure consists of a fire-resistant layer made of fire-resistant material as the central layer, with wood layers on both sides that serve as wall supports. The fire-resistant material and the wood layers are fixed together with linear members, which are embedded in the wood layers as fire-resistant wall material.

2. The fire-resistant wall material according to claim 1, characterized in that each of the wood layers on one side is bonded to the fire-resistant material with a separate linear material.

3. The fire-resistant wall material according to claim 1, characterized in that the fire-resistant material is formed of a hardened layer of dry-type fire-resistant board material or inorganic filler material, which is laminated in multiple layers.

4. The fire-resistant wall material described in claim 1 is a fire-resistant wall structure joined to a frame, A fire-resistant wall structure characterized in that each of the wood layers is joined to beam members and / or column members that form the frame.

5. The beam members and / or column members are H-shaped steel, The fire-resistant wall structure according to claim 4, characterized in that each of the wood layers is joined to the flange of the H-shaped steel with a linear material.

6. The fire-resistant wall structure according to claim 5, characterized in that the wood layers provided on both sides each serve as load-bearing sections.

7. Two pieces of fire-resistant wall material are formed on one side by inserting a linear material through the fire-resistant material side so that the tip remains inside the wood board and securing both together. A method for manufacturing a fire-resistant wall material according to claim 1, wherein the fire-resistant materials of two fire-resistant wall materials on one side are joined together with an adhesive, and the central layer is provided with two fire-resistant materials and wood layers that serve as wall support parts on both sides.

8. Insert a linear material through one side of two wooden boards, with the end slightly raised and the tip remaining inside the wooden board. Place wooden boards opposite each other with a gap between the head ends of the linear material. A fluid inorganic filler is filled into the gap. The inorganic filler is cured, A method for producing a fire-resistant wall material according to claim 3, wherein the central layer is formed of a hardened layer of inorganic filler, and wood layers are provided on both sides thereof.

9. A method for constructing a fire-resistant wall structure by joining the building frame and the wood layers provided on both sides of the fire-resistant wall material described in claim 1 by inserting linear members in the thickness direction of the wood layers.

Images