WO2004111376A1 - Wooden fire door - Google Patents

Abstract

A wooden fire door that is capable of exhibiting excellent fire protection characteristics with a structure that is made as simple as possible and whose production cost can be remarkably reduced. In a wooden fire door (10) having a wooden core member (20) and a decorative plate (30) provided on a surface of the door, a burn delay member (100) is installed between the core member (20) and the decorative plate (30). The burn delay member (100) is constructed from at least a sheet of paper (101) having fire resistant adhesive layers (102) on both surfaces. Excellent fire protection characteristics can be obtained with the structure above, and also the product can be provided at low cost because production costs can be remarkably reduced.

Description

 Specification

 Wooden fire door

 Technical field

 The present invention relates to a wooden fire door which is used, for example, as a door of a house or a company and has a fire prevention performance of trapping fire or heat when a fire occurs.

 Background art

 [0002] Conventionally, the specific fire prevention equipment 60 is made of steel and its power is not recognized. Therefore, the fire door is generally made of steel. Steel fire doors have the drawbacks of being strong, warping with heavy heat, and having high radiant heat (5-8 times the size of wood).

 [0003] Therefore, the test methods for Class A fire doors and Class B fire doors were revised in 1990, and even if wooden doors were to meet certain conditions, they would be approved as the specified fire protection equipment 60 or the specified fire protection equipment 20. As a result, wooden fire doors made of paulownia wood have been developed.

 [0004] Japanese Patent Application Laid-Open No. 7-208033 discloses a paulownia laminated plate obtained by laminating a paulownia glulam, and Japanese Patent Application Laid-Open No. 7-259445 discloses a paulownia glue laminated lumber and a thermosetting resin. A laminated resin laminate is disclosed. Japanese Unexamined Patent Publication No. 7-293127 discloses a combination of paulownia wood and non-combustible paper, and Japanese Unexamined Patent Publication No. 7-324561 discloses a combination of a paulownia wood and phenol foam. Have been. Further, Japanese Unexamined Patent Publication No. 9-256746 discloses a combination of a paulownia laminated wood and a refractory sheet, and Japanese Unexamined Patent Publication No. 2000-179245 discloses a combination of a paulownia wood and a volcanic glass fiber plate. Is disclosed. Further, Japanese Patent Application Laid-Open No. 2000-310090 discloses a structure for preventing the warp of the paulownia wood, and Japanese Patent Application Laid-Open No. 2001-17560 discloses a structure for facilitating escape at the time of disaster.

[0005] However, the conventional wooden fire doors have a problem in terms of, for example, deterioration in fire prevention performance due to aging, manufacturing costs, or fire prevention performance in the event of fire, and can be sufficiently satisfied. No product has been obtained. In other words, fire performance cannot be obtained for 60 minutes in an average combustion test at approximately 900 ° C based on ISO standards, and it cannot be approved by the Minister of Land, Infrastructure, Transport and Tourism as “specified fire prevention equipment”. [0006] Furthermore, as described above, since the use of phenol form or a volcanic glass fiber plate or the like to enhance the fire protection performance of a wooden fire door, the manufacturing cost increases, and ultimately, it increases. However, there is a problem that the product cost increases.

 Disclosure of the invention

 Problems the invention is trying to solve

[0007] In view of such circumstances, an object of the present invention is to provide a wooden fire door capable of exhibiting extremely excellent fire prevention performance with a structure as simple as possible and capable of greatly reducing costs.

 Means for solving the problem

[0008] A first aspect of the present invention for achieving the above object is a wooden fire door having a wooden core and a decorative plate provided on a surface thereof, wherein a wooden fireproof door is provided between the core and the decorative plate. Is a wooden fire door characterized in that at least one sheet-like combustion delay member having a fire-resistant adhesive layer on both sides is provided.

 [0009] A second aspect of the present invention is characterized in that, in the first aspect, two or more Japanese papers and the fire-resistant adhesive layer provided between and on both sides of the Japanese paper are provided. Wooden fire door.

 [0010] A third aspect of the present invention is the wooden fire door according to the first or second aspect, wherein the combustion delay member is press-bonded between plate members joined to both surfaces thereof. It is in

[0011] In a fourth aspect of the present invention, in any one of the thirteenth to thirteenth aspects, the combustion delay member is provided between the core material and a non-combustible material obtained by impregnating wood with a combustion retardant, Further, the wooden fire door is characterized in that the decorative board is joined to a surface of the non-combustible material opposite to the core material side.

 [0012] A fifth aspect of the present invention is the wooden fire door according to the fourth aspect, wherein the combustion delay member is also provided between the incombustible material and the decorative board. .

[0013] In a sixth aspect of the present invention, in any one of the first to fifth aspects, the refractory adhesive layer contains at least an inorganic material comprising a siloxane and a silanol salt. It is on the characteristic wooden fire door. [0014] In a seventh aspect of the present invention, in the fourth aspect, the flame retardant contains a flame retardant containing at least one of ammonium polyphosphate and boric acid. There is a wooden fire door.

[0015] In an eighth aspect of the present invention, in the seventh aspect, the combustion retardant contains an inorganic material that becomes a molten state during combustion to fix a carbonized residue. Located on a wooden fire door.

 In a ninth aspect of the present invention, in the eighth aspect, the inorganic material comprises at least one selected from a silicate, a borosilicate, a borate and silica. Located on wooden fire doors.

 [0017] A tenth aspect of the present invention is the wooden fire door according to any one of the first to ninth aspects, wherein the decorative board is a wooden plywood impregnated with the combustion retardant. .

[0018] An eleventh aspect of the present invention is the wooden fire door according to any one of the eleventh to tenth aspects, wherein the core material is mainly made of paulownia material.

[0019] A twelfth aspect of the present invention is the wooden fire door according to any one of the eleventh to eleventh aspects, wherein the core material is a laminate of paulownia laminated wood.

[0020] A thirteenth aspect of the present invention is the wooden fire door according to the twelfth aspect, wherein the core material is a three-layer cross-clad laminate of the paulownia laminated wood.

 A fourteenth aspect of the present invention is characterized in that, in any one of the eleventh to thirteenth aspects, a graphite foam material is provided in the vicinity of an end face of the door in a longitudinal direction thereof. It is on the wooden fire door.

 The invention's effect

 [0022] According to the present invention, despite a relatively simple structure in which a combustion delay member made of at least a paper having a refractory adhesive layer on both surfaces is provided between the core material and the decorative plate, an extremely long time is required. This has the effect of providing a low cost wooden fire door that can exhibit excellent fire protection performance and greatly reduce costs.

 BRIEF DESCRIPTION OF THE FIGURES

 FIG. 1 is a schematic perspective view of a wooden fire door according to Embodiment 1 of the present invention.

FIG. 2 is a sectional view of a wooden fire door according to Embodiment 1 of the present invention, where (a) is a longitudinal sectional view. Yes, (b) is a cross-sectional view.

 FIG. 3 is an enlarged sectional view of a main part of a wooden fire door according to Embodiment 1 of the present invention.

 FIG. 4 is an enlarged sectional view of a main part for explaining a combustion delay member and a method for manufacturing the same according to Embodiment 1 of the present invention.

 FIG. 5 is an enlarged sectional view of a main part showing one manufacturing process of the wooden fire door according to Embodiment 1 of the present invention.

 FIG. 6 is an enlarged sectional view of a main part of a wooden fire door according to Embodiment 2 of the present invention.

 FIG. 7 is an enlarged sectional view of a main part of a wooden fire door according to Embodiment 3 of the present invention.

 FIG. 8 is an enlarged sectional view of a main part of a wooden fire door according to Embodiment 4 of the present invention.

 Explanation of reference numerals

[0024] 10 wooden fire doors

 20 core material

 21, 22, 23 Paulownia members

 24 Paulownia laminate

 25 Reinforcement members

 30 decorative plywood

 40 foam

 50 Cosmetic materials

 60 Natural wood glued lumber

 100 Combustion delay member

 101 Japanese paper

 102 fire resistant adhesive

 103 noncombustible material

 BEST MODE FOR CARRYING OUT THE INVENTION

[0025] According to the wooden fire door of the present invention, by providing at least one sheet-like combustion delay member having a fire-resistant adhesive layer on both surfaces between the core material and the decorative board, a fire can be prevented when a fire occurs. However, this combustion delay member traps fire and heat for a long period of time, and exhibits extremely excellent fire protection performance. That is, the wooden fire door of the present invention has a combustion delay between the core material and the decorative board. Despite its relatively simple structure with intervening members, it can achieve a fire protection performance of more than 60 minutes in a combustion test at an average of about 900 ° C based on ISO standards. In the present invention, at least a wooden door having a core material is defined as a wooden fire door.

 [0026] Further, a plurality of such combustion delay members, for example, in terms of both fire prevention performance and cost, for example,

 It is preferable to adopt a laminated structure including two or more sheets of paper and a refractory adhesive layer provided between the respective sheets of paper. Thereby, since a plurality of fireproof adhesive layers are provided, the fire protection performance of the wooden fire door can be further enhanced.

 Here, the refractory adhesive forming the refractory adhesive layer preferably contains at least an inorganic material composed of a siloxane and a silanol salt. Specifically, a refractory adhesive is formed by reacting metal silicon (purity 99%) with sodium hydroxide in an aqueous solvent in the presence of a boric acid compound or an inorganic acid such as fluoride. It preferably contains an inorganic material composed of a siloxane and a silanol salt. Such an inorganic material is a low-viscosity material having a composition ratio of SiZNa of 2 or more, an amorphous pH of 12 or less, and a hardness of 500 cP or less. A fire-resistant adhesive for forming such a fire-resistant adhesive layer is commercially available from, for example, Comics as an aqueous film-forming inorganic compound “Liquid ceramics (LC) silica-based”.

 [0028] Such a fire-resistant adhesive contains, for example, an inorganic material composed of a siloxane / silanol salt, and when heated at a relatively high temperature in the event of a fire, becomes an inorganic foam and has excellent heat insulation. A material that has both high performance and excellent waterproof performance. In the present invention, a refractory adhesive layer made of such a refractory adhesive is formed on both sides of at least one sheet of paper, and this is interposed as a combustion delay member between the core material and the decorative plate. In the event of a fire, the fire-resistant adhesive layer becomes an inorganic foam, trapping fire and heat over a long period of time, significantly reducing the effect on the core material and providing excellent fire protection performance. A fire door can be realized.

[0029] For example, in a wooden fire door using a combustion delay member made of two sheets of paper having a fire-resistant adhesive layer on both sides and between them, the fire-resistant adhesive layer on the decorative plate side of the combustion delay member is heated to form an inorganic foam. It becomes a body, and this inorganic foam blocks fire and heat for a long time. Also, even when the heat insulating effect of the inorganic foam is reduced, the refractory adhesive layer on the core material side of the combustion retarding member is still inorganic. Since it is a foam, the paper and the inorganic foam can further block fire and heat, thereby effectively preventing the core material from burning over a long period of time. As described above, in the present invention, in particular, by laminating two or more papers, a plurality of such fire-resistant adhesive layers can be provided, which is very effective in enhancing fire prevention performance.

[0030] In addition, since such a fire-resistant adhesive layer can be expected to have a waterproof effect as described above, this fire-resistant adhesive layer serves as a waterproof sheet, and warps due to diffusion of moisture of the core material. Can be effectively prevented. Therefore, warpage of the core material and the like is effectively prevented, and there is no problem of performance degradation over time.

[0031] The paper used for the combustion delay member is not particularly limited, and conventionally known papers can be used. Examples thereof include paper such as Japanese paper and Western paper, and Japanese paper is particularly preferred. Les ,. The thickness of such paper is not particularly limited, but is preferably, for example, about 0.1 to 0.6 mm.

[0032] Further, in the present invention, the combustion delay member is preferably press-bonded between plate members bonded to both surfaces thereof. For example, a combustion delay member is interposed between a core material and a decorative plate, and a predetermined load is applied to the core material and the decorative plate so as to sandwich the combustion delay member. It is compressed between the material and the decorative board, and is bonded to each of the core material and the decorative board via the refractory adhesive layer. That is, for example, when the combustion delay member is composed of a plurality of sheets of paper, it is preferable to laminate on one of the plate members, and overlap and press-bond the other plate member. As described above, when the flame retarding member is compressed in the thickness direction by press bonding, the paper is impregnated with the refractory adhesive forming the refractory adhesive layer, and the two are integrated. At this time, the fire-resistant adhesive layer is uniformly and stably formed between the two plate materials with a plurality of papers interposed therebetween, and the paper becomes a buffer material compared with the case where no paper is interposed. It is possible to form a refractory adhesive layer having a desired thickness with less outflow of the agent. Thereby, the fire prevention performance of the wooden fire door can be dramatically improved. That is, in the present invention, paper, particularly Japanese paper, functions so as to stably form the refractory adhesive layer between the plate materials. Therefore, in the present invention, in particular, if a combustion delay member is formed by laminating two or more sheets of paper with a fire-resistant adhesive layer, and this combustion delay member is press-bonded to each of the core material and the decorative board, the fire protection of the wooden fire door can be prevented. Performance can be further enhanced. It should be noted that such a combustion delay member is a wooden protection member. It may be provided only on one side of the fire door to which the fire protection performance is to be provided.

 Further, in the present invention, such a combustion delay member is preferably provided, for example, between a core material and a dummy material in order to enhance fire prevention performance. Then, it is preferable that the dummy material and the decorative board are bonded by a fire-resistant adhesive layer. As a result, the number of fire-resistant adhesive layers is increased, and when a fire occurs, each of the fire-resistant adhesive layers becomes an inorganic foam, so that the fire prevention performance of the wooden fire door can be enhanced. More preferably, such a dummy material is impregnated with a combustion retardant to make it a noncombustible material. As a result, when a fire occurs, this non-combustible material can trap fire and heat for a long period of time. Of course, the present invention is not limited to this, and at least one of such a dummy material and a non-combustible material may be provided between the core material and the combustion delay member. It may be provided. In any case, by providing at least one of such a dummy material or a non-combustible material between the core material and the decorative plate, the fire prevention performance of the wooden fire door can be enhanced.

 [0034] In the wooden fire door of the present invention, in addition to the dummy material, for example, when a wooden plywood is used as a decorative board, the wooden plywood may be impregnated with a combustion retardant. That is, instead of the dummy material, a wooden plywood may be impregnated with a combustion retardant, or each of the dummy material and the wooden plywood may be impregnated with a combustion retardant. Of course, the core material may be impregnated or coated with a flame retardant, if necessary, to secure the desired fire protection performance.

 Further, in the present invention, from the viewpoint of enhancing fire prevention performance, it is preferable to press-bond such a dummy material or non-combustible material to the combustion delay member, the core material, and the decorative board. For example, the combustion delay member, the non-combustible material, the core material, and the decorative plate may be press-bonded at the same time. It may be sandwiched between the boards and adhered to each other, or may be sandwiched between the core material and the decorative board and then further press-bonded.

[0036] The wood used as such a non-combustible material is not particularly limited as long as it is impregnated with a flame retardant, and conventionally known natural wood can be used. , Cedar, karamatsu, and ryou, or a laminated material or a laminated material thereof. Of course, in addition to wood, a resin or the like may be impregnated with a flame retardant to make it a non-combustible material. The thickness of such a noncombustible material is not particularly limited, but is preferably, for example, about 3 to 6 mm. As such a flame retardant for impregnating wood or the like, it is preferable to use a phosphoric acid type, a boric acid type, a non-halogen type water-soluble type, etc., which are non-toxic and odorless and volatile. Using organic compounds (VOC), etc.

 In particular, in the present invention, it is preferable to use a flame retardant containing at least a flame retardant. Such a flameproofing agent is not particularly limited as long as it contains at least one of ammonium polyphosphate and boric acid as a component and impregnates wood. Boric acid and the like contained in such a flame retardant react with OH groups contained in wood tissue (cellulose, hemicellulose, lignin, etc.) during the burning of the core material or non-combustible material. It generates an inflammable carbonized layer and water, and exerts the action of preventing the generation of flammable substances (dehydration carbonizing action). For this reason, it is effective to include a large amount of boric acid or the like in the combustion retardant. For example, a flame retardant containing a high-concentration boric acid compound obtained by mixing a boric acid compound so as to have a solubility equal to or higher than 100 g of 5 g Z water at normal temperature is preferable. Of course, in addition to such a boric acid compound, for example, a phosphoric acid, a silanol salt, a polymer material, or the like may be contained in the combustion retardant, if necessary. It is particularly preferable to include a high-concentration boric acid compound comprising one or more of a metal ion sequestering agent or a wet-permeable surfactant and a phosphoric acid compound / silanol salt.

 [0039] Here, examples of such a flameproofing agent include a flameproofing agent mainly containing ammonium polyphosphate and ammonium sulfate, and further containing other components as necessary. Alternatively, a flameproofing agent containing boric acid as a main component and further containing other components as necessary may be mentioned. Of course, a flame retardant obtained by mixing these flame retardants may be used. It should be noted that such a boric acid-based compound such as boric acid can also be expected to have an antiseptic / antibiotic effect.

[0040] Further, in the present invention, the flame retardant may contain an inorganic material for fixing a carbonized residue obtained by burning wood or the like, together with the flame retardant. In other words, the inorganic material acts to fix the carbonized residue that melts under high-temperature heating to become a glass state and is difficult to burn, prevents the carbonized residue from dropping, and has the ability to generate water. Therefore, the surface temperature is reduced, and the fire prevention performance is further improved. More specifically, inorganic salts having water of crystallization release or decompose the water of crystallization during combustion to exhibit an endothermic effect. As an inorganic material for immobilizing such a carbonized residue, there is citric acid. At least one selected from salts, borates, borates, and silica. Examples of the silicates include water, which is an alkali silicate obtained by melting silicon dioxide and an alkali. Glass. However, if normal water glass is used, the alkali component is too strong. It is preferable to use one with a reduced / o. Examples of the borate include sodium borate (borax). It should be noted that such a borate can be expected to have an antiseptic and anti-termite effect similarly to the above-mentioned boric acid.

[0041] As described above, in the present invention, by including a specific inorganic material in the above-described combustion retardant, the dehydration carbonizing action and the endothermic action act in a combined manner, and further excellent fire prevention performance can be obtained. it can.

[0042] The amount of such a flame retardant impregnated is not particularly limited as long as it is appropriately adjusted according to the type and dimensions of the wood to be impregnated so as to obtain a desired fire prevention performance. In the case of wood having a thickness of 36 mm, the standard is about 50 150 g in a liquid state, and particularly preferably about 90 g. In addition, since it is sufficient to apply only a flame retardant to wood, in such a case, it is preferable to apply about 200 g / m ² .

 Here, the method for impregnating the wood with the combustion retardant is not particularly limited. For example, after a sufficient amount of the combustion retardant is put in a container, the temperature is raised to about 80 ° C. And a method in which wood is immersed therein at a predetermined temperature for a certain period of time for impregnation. After impregnation with the flame retardant, the non-combustible material impregnated with a certain amount of the active ingredient is produced by natural drying within 1 to 12 hours or drying by heating. Here, impregnating the wood with the combustion retardant in the present invention is not limited to so-called diving, in which the wood is immersed in a container storing the combustion retardant, and impregnation by pressure may be used.

[0044] The method for manufacturing the above-described combustion retardation member is not particularly limited. For example, a fire-resistant adhesive layer is applied to the entire surface of one side of the paper at about 200 g / m2 using a roll coater or the like. It is manufactured by applying ² pieces and then attaching another paper or non-combustible material. At this time, the paper and the non-combustible material may be press-bonded. In the wooden fire door of the present invention, a wooden fire door is manufactured by joining a combustion delay member to both surfaces of the core material on the door surface side, and then joining decorative panels on the surfaces of the combustion delay member. You. As described above, when the core material, the decorative board, and the combustion delay member are joined to each other, a heat-resistant material generally used is used. Although an adhesive may be used, it is particularly preferable to use the above-described fire-resistant adhesive from the viewpoint of enhancing fire prevention performance. As a result, a wooden fire door having very excellent fire protection performance can be realized.

 [0045] As described above, there is no conventional wooden fire door using a combustion delay member as in the present invention. By using such a fire door, a very high fire protection can be obtained as compared with a conventional fire-resistant plate or fire-resistant sheet. A high performance wooden fire door can be provided at low cost.

 Here, as the core material used for the wooden fire door of the present invention, it is preferable to use a paulownia material from the viewpoint of fire protection performance and weight reduction, but if there is no problem in fire protection performance, other wood may be used. It can be used as a core material. In other words, the paulownia wood used as the core material itself exhibits fire protection performance. In addition to such paulownia wood, the impregnation amount of the combustion retardant, cost, door weight, or door strength In consideration of the above, for example, wood such as cedar, Karamatsu, and Ryou can be used. In particular, in order to increase the strength of the door, it is preferable to use cedar and karamatsu, etc., and in terms of cost, it is preferable to use thinned cedar and matsu. Also, it is preferable to use paulownia wood from the viewpoint of reducing the weight of the door. If the door is lightened in this way, it is possible to reduce the transportation cost and to improve the workability at the time of installation. Furthermore, when the core is made of paulownia wood, it is preferable to use a paulownia wood of a quality that is unlikely to warp. The core material may be any one of a paulownia wood cut from natural paulownia wood and a paulownia laminated wood, and may be a single material or a laminated material. When laminating, it is preferable to use an odd number. In any case, the type of wood forming the core material may be appropriately determined in consideration of required fire prevention performance, cost, and the like.

 [0047] In general, it is preferable to laminate a plurality of plies using a paulownia laminated wood, and furthermore, a laminated material having a three-layer structure in which the grain (fiber direction) is crossed so as to be substantially orthogonal. Is particularly preferred,

[0048] In addition, since paulownia wood is likely to be warped by heat, it is necessary to cover the four sides of the surface, that is, the four sides of the door, with a reinforcing member (frame material) made of wood that is harder to warp than paulownia wood. There is. Examples of such reinforcing members include artificial plywood, which is preferably a natural wood laminated wood having a specific gravity of 0.5 or more, and frame materials such as LVL (natural grain parallel plywood laminated wood). In addition, the reinforcing member is in contact with the laminated material or the like via the above-described fire-resistant adhesive in terms of enhancing fire protection performance. It is preferable to combine them. Of course, even if it is a paulownia wood, if the paulownia wood is used as a paulownia laminated wood, the strength can be secured, and this may be used as a reinforcing member. Further, in the present invention, a three-layer cloth of natural wood laminated wood may be used as the reinforcing member. In this case, the fire protection performance can be further improved by joining the natural wood laminated timber with a fire-resistant adhesive. In such a case, the laminated material and the reinforcing member may be joined by a structure in which they are fitted to each other via the uneven portion. preferable. In the present invention, such a reinforcing member is included in a laminated material and is referred to as a core material.

[0049] Further, a decorative plate is provided on the outermost surface of the wooden fire door of the present invention. Examples of the decorative board include a laminated wood and a laminate formed using natural wood, a chemical board such as a wooden plywood or a calcium silicate board. When a wooden board is used as the decorative board, the decorative board does not need to be impregnated with the above-described combustion retardant, but may be impregnated if necessary. In addition, since a chemical plate has a certain degree of fire prevention performance, a wooden fire door using a chemical plate as a decorative plate is different from a wooden fire door using a wooden plate material impregnated with a flame retardant as a decorative plate. In comparison, fire prevention performance hardly decreases.

 [0050] As described above, the wooden fire door of the present invention is provided with a combustion delay member made of at least one sheet of paper having a fire-resistant adhesive layer on both sides, between the core material and the lig board. Despite its relatively simple structure, fire protection performance of more than 60 minutes can be obtained in a combustion test at an average of about 900 ° C based on ISO standards.

 Further, the wooden fire door according to the present invention has a relatively simple structure without using a fire-resistant sheet or the like, and exhibits excellent fire prevention performance. The product can be provided at low cost.

 Here, in the present invention, as described above, by interposing a combustion delay member between the core material and the decorative plate, extremely excellent fire prevention performance can be obtained. It is not necessary to take fire-prevention measures, but if necessary, impregnating or applying a flame retardant to the core material, decorative panel, etc. can further enhance the fire-prevention performance.

For example, when impregnating the core with the reinforcing member attached thereto with the combustion retardant, the entire body may be impregnated with the combustion retardant as it is, but only the paulownia wood is impregnated with the combustion retardant. rear , A reinforcing member may be attached. Of course, when the reinforcing member is retrofitted in this manner, the fire retarding performance can be further enhanced by impregnating and applying the combustion retarder to the reinforcing member.

 When a core material is formed using a laminated material, it is preferable to adhere a laminated material or the like with a fire-resistant adhesive in order to enhance fire prevention performance. However, in the present invention, by using a combustion delay member, Since excellent fire protection performance can be obtained, it is not necessary to glue the laminated wood with a fire-resistant adhesive. Of course, according to the required fire protection performance, the laminated material may be joined via a fire-resistant adhesive to form a core material.

 In the present invention, the structure of the wooden fire door is not particularly limited except that a combustion delay member made of at least one sheet of paper having a fire-resistant adhesive layer on both sides is provided between the core material and the decorative plate. Instead, a well-known fire prevention structure may be employed according to the required fire prevention performance.

 [0056] For example, a paulownia laminate and a thermosetting resin laminate are laminated (the structure disclosed in JP-A-7-259445), and a paulownia wood and non-combustible paper are combined (JP-A-7-259445). No. 293127), a combination of paulownia wood and phenolic foam (structure disclosed in JP-A-7-324561), and a combination of paulownia glue laminated with a refractory sheet (Japanese Unexamined Patent Publication No. The structure disclosed in Japanese Patent No. 256746), a combination of paulownia wood and a volcanic glass fiber plate (the structure disclosed in Japanese Patent Application Laid-Open No. 2000-179245) and the like can be used. A structure using only paulownia laminates laminated with materials (the structure disclosed in Japanese Patent Application Laid-Open No. 7-208033) may be used. May be applied.

 Hereinafter, the best mode for carrying out the present invention will be described.

 (Embodiment 1)

 FIG. 1 is a schematic perspective view of a wooden fire door according to Embodiment 1 of the present invention. 2 is a cross-sectional view of the wooden fire door according to Embodiment 1 of the present invention, in which (a) is a longitudinal sectional view and (b) is a transverse sectional view. FIG. 3 is an enlarged sectional view of a main part of the wooden fire door.

 As shown in FIG. 1 and FIG. 2, the wooden fire door 10 of the present embodiment includes a paulownia laminate 24 in which a plurality of paulownia members 21-23 are laminated, and reinforcing members 25 provided on four sides thereof. And a decorative plate 30 made of a wooden plywood joined to the surface of the core material 20.

[0060] The paulownia laminate 24 is positioned between the paulownia members 21 and 22 whose grain direction (fiber direction) matches the longitudinal direction. Furthermore, the paulownia members 21 and 22 have a three-layer cross-clad structure in which a paulownia member 23 that is a direction orthogonal to the grain direction is sandwiched and laminated. The paulownia members 21 to 23 constituting the paulownia laminate 24 may be formed in a predetermined size, and may be formed by joining a plurality of short pieces and dimensions. It may be something. The paulownia laminate 24 formed by cross-tensioning the paulownia members 21-23 so that the grain direction is substantially orthogonal to the paulownia members 21-23 can effectively prevent warpage.

 [0061] Further, reinforcing members 25 made of wood harder than paulownia wood, in this embodiment, a composite plywood, are provided on the upper, lower, left, and right end surfaces of the paulownia laminated board 24. For such a reinforcing member 25, for example, in this embodiment, a paulownia laminated wood is used. Thus, since the core material 20 is formed by surrounding the four sides of the paulownia laminate 24 with the reinforcing members 25, warpage can be more reliably prevented. The thickness of the reinforcing member 25 (dimension in the surface direction of the door) needs to be about 150 mm in order to satisfy a fire test of 60 minutes, which depends on the fire protection performance of the wooden fire door.

 Further, in the wooden fire door 10 of the present embodiment, a foam material 40 is provided on the surface on the door end face side of the reinforcing member 25 so as to be embedded in the longitudinal direction. A decorative material 50 which is a large material or a side material is provided on the surface of the reinforcing member 25 on the door end surface side so as to cover the reinforcing member 25.

 Here, as the foam material 40, for example, a graphite foam material that expands about 10 times in the thickness direction at about 230 ° C. may be used, thereby completely closing the gap with the frontage. It can prevent the flow of smoke and the spread of fire. In this embodiment, the foam material 40 is provided on four sides of the fire door, but may be provided on at least three end faces. Further, the cosmetic material 50 can be omitted as necessary depending on the place.

 [0064] Further, the decorative board 30 is bonded to the surface of the core material 20, and in this embodiment, a wooden plywood having a thickness of 4 mm was used.

[0065] Between the core material 20 and the decorative board 30, in the present invention, there is provided a combustion retarding member made of at least a profile paper having a fire-resistant adhesive layer made of a fire-resistant adhesive on both surfaces. There. For example, in the present embodiment, as shown in FIG. 3, the combustion delay member 100 is formed by bonding three Japanese papers 101 with a fire-resistant adhesive layer 102 made of a fire-resistant adhesive. The flame retardant member 100 is made of a core material 20 and a decorative board 30 and a fire-resistant adhesive layer. Joined by 102.

Here, the combustion delay member 100 will be described with reference to FIG. FIG. 4 is an enlarged sectional view of an essential part for explaining a combustion delay member and a method for manufacturing the same according to Embodiment 1 of the present invention. The combustion delay member 100 is manufactured as follows. Specifically, first, three pieces of Japanese paper 101 having a thickness of 0.1 to 0.6 mm as shown in FIG. 4A are prepared. Thereafter, as shown in Figure. 4 (b), in the on one surface of the core member 20, for example, using a roll coater, a refractory adhesive about 20 Og / m ² applied to a refractory adhesive layer 102 formed I do. Thereafter, the Japanese paper 101 is stuck on the fire-resistant adhesive layer 102, and the same operation is repeated twice, so that the three sheets of Japanese paper 101 are bonded by the fire-resistant adhesive layer 102 as shown in FIG. 4 (c). . Next, as shown in FIG. 4 (d), after forming a refractory adhesive layer 102 on the washi paper 101, a decorative board 30 is attached, so that the burning between the core material 20 and the decorative board 30 is performed. A delay member 100 is formed.

 In the present embodiment, as shown in FIG. 5, the combustion delay member 100 is brought into contact with each of the core material 20 and the decorative plate 30 via the fire-resistant adhesive layer 102. Press bonding was performed under a predetermined load. At this time, each Japanese paper 101 is impregnated with the effective component of the fire-resistant adhesive layer 102 and both are integrated. As a result, the fire prevention performance of the wooden fire door can be dramatically improved. Of course, when the combustion delay member 100 is formed using a plurality of Japanese papers 101 as in the present embodiment, for example, the Japanese paper 101 is laminated on the decorative board 30 via the fire-resistant adhesive layer 102, The core material 20 may be press-bonded thereon.

 Here, the refractory adhesive forming the refractory adhesive layer 102 preferably contains at least an inorganic material composed of a siloxane and a silanol salt. For example, in this embodiment, the refractory adhesive is formed by reacting metal silicon (purity 99%) with sodium hydroxide in an aqueous solvent in the presence of an inorganic acid such as a boric acid compound or a fluoride. An inorganic material consisting of the siloxane and the silanol salt was contained. Further, such an inorganic material is a material having an Si / Na component ratio of 2 or more, an amorphous material having a pH of 12 or less and a hardness of 500 cP or less and having low viscosity. For example, in the present embodiment, an aqueous film-forming inorganic compound “Liquid Ceramics (LC) silica-based” (trade name: manufactured by Comix Corporation) was used as such a refractory adhesive.

[0069] In the present embodiment, the refractory adhesive layer 102 is made of a siloxane / silanol salt. When heated at a relatively high temperature in the event of a fire, it becomes an inorganic foam and exhibits excellent heat insulation and waterproof properties. For this reason, when a fire occurs, the wooden fire door 10 of the present embodiment becomes an inorganic foam from the decorative plate 30 side of the combustion delay member 100, which blocks fire and heat for a long time. Even if the heat insulating effect of the inorganic foam is reduced, the fire-resistant adhesive layer 102 sandwiched between the Japanese paper and the Japanese paper is also made of the inorganic foam. 20 can be effectively blocked from burning.

 [0070] Further, since such a fire-resistant adhesive layer 102 has a waterproof effect and functions as a waterproof sheet, it is possible to effectively prevent the warpage due to the diffusion of moisture from the core material 20. . Therefore, the wooden fire door 10 of the present embodiment can prevent fire and heat for a long period of time and also prevent the occurrence of warpage, so that extremely excellent fire prevention performance can be obtained.

 As described above, the wooden fire door 10 of the present embodiment has the fire-resistant adhesive layer 102 between the core material 20 and the decorative board 30 and between both sides and each of the three sheets of Japanese paper 101. Since the combustion delay member 100 is provided, extremely excellent fire prevention performance can be obtained in the event of a fire despite the relatively simple structure.

 Further, the wooden fire door 10 can effectively prevent warpage of the core member 20 and the like by the waterproof effect of the fire-resistant adhesive layer 102 of the combustion delay member 100, and can reduce performance and cost due to aging. No problem.

 [0073] The combustion delay member 100 may be provided only on one side to which fire protection performance is to be provided.

(Embodiment 2)

 FIG. 6 is an enlarged sectional view of a main part of a wooden fire door according to Embodiment 2 of the present invention. Note that, in the present embodiment, the same portions as those described with reference to FIGS. 1 to 4 are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIG. 6, the wooden fire door 10A of the present embodiment is the same as the above except that the combustion delay member 100 is provided between the non-combustible material 103 in which a dummy material is impregnated with a combustion retardant and the core material 20. This is the same as in the first embodiment.

Specifically, the wooden fire door 10A of the present embodiment is configured such that each of the three pieces of Japanese paper 101 and the non-combustible material 103 are bonded with a fire-resistant adhesive layer 102, and the core material 20 and the decorative board 30 are bonded together. Each It has a structure further bonded by a refractory adhesive layer 102. In the present embodiment, between the non-combustible material 103 and the decorative board 30, a combustion delay member 100A made of one piece of Japanese paper 101 having a fire-resistant adhesive 102 on both surfaces is provided.

 Here, the flame retardant impregnated in the dummy material contains a flame retardant containing at least one of ammonium polyphosphate and boric acid as a component. For example, in the present embodiment, a flame retardant containing boric acid was used. When such a flame retardant containing boric acid is impregnated into a dummy material, it has an effect of substantially stopping the supply of oxygen to the wood tissue in the event of a fire. In other words, boric acid reacts with the 〇H group contained in the wood tissue during combustion of the noncombustible material 103 to generate a hardly combustible carbonized layer and water, thereby preventing the generation of flammable substances ( (Dehydration carbonization).

 [0078] In the present embodiment, it is preferable that the dummy material is impregnated with a flame retardant containing an inorganic material that becomes a molten state and fixes a carbonized residue when burned together with such a flame retardant. . Such an inorganic material melts when a fire occurs or the like, and becomes, for example, a glassy state, and acts to mutually fix carbonized residues generated by carbonizing the noncombustible material 103. Therefore, if the inorganic material is impregnated into the wood together with the flame retardant, the carbonized residues are fixed to each other by the inorganic material, and the carbonized residues can be prevented from collapsing. Examples of such an inorganic material include those in which the alkalinity of water glass is reduced by 70% to 80%. It is needless to say that such an inorganic material may be added as appropriate according to the required fire prevention performance, and need not be added.

 Further, in this embodiment, the dummy material is impregnated with the combustion retardant. However, the present invention is not limited to this. For example, the decorative plate may be impregnated with the combustion retardant instead of the dummy material. May be impregnated.

 (Embodiment 3)

 FIG. 7 is an enlarged sectional view of a main part of a wooden fire door according to Embodiment 3 of the present invention. Note that, in the present embodiment, the same portions as those described with reference to FIGS. 1 to 4 are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIG. 7, in each of the wooden fire doors 10 B of the present embodiment, the combustion delay member 100 is provided between the non-combustible material 103 in which the combustion retardant is impregnated in the dummy material and the decorative board 30. And burning Embodiment 2 is the same as Embodiment 2 except that the delay member 100A is provided between the core member 20 and the non-combustible member 103.

 [0082] Also in the wooden fire door 10B having such a configuration, each of the combustion delay members 100, 100A, and the non-combustible material 103 traps fire and heat for a long time, and thus is similar to the first embodiment described above. Demonstrate very good fire protection performance.

 (Embodiment 4)

 FIG. 8 is an enlarged sectional view of a main part of a wooden fire door according to Embodiment 4 of the present invention. Note that, in the present embodiment, the same portions as those described with reference to FIGS. 1 to 4 are denoted by the same reference numerals, and redundant description will be omitted.

 [0084] As shown in Fig. 8 (a), a core member composed of a reinforcing member 25C in which three layers of natural wood laminated timber 60 are cross-bonded and a paulownia laminated material 24C in which three layers of each paulownia member 21-23 are cross-stretched. It is the same as Embodiment 1 described above, except that a wooden fire door 10C using 20C is used. Further, the paulownia laminate 24C and the reinforcing member 25C are fitted to each other via a concave-convex portion 70 provided at a joint portion between the two. Thereby, sufficient joining strength is obtained and door strength can be increased.

 [0085] Further, as shown in Fig. 8 (b), a wooden fire door 10D using a reinforcing member 25D having a structure in which each natural wood laminated wood 60 is bonded by a fire-resistant adhesive layer 102 may be used. Further, in the wooden fire door 10D, the reinforcing member 25D and the paulownia laminated material 24D are further adhered to each other by the refractory adhesive layer 102, and the respective paulownia members 21-23 constituting the core material 20D are mutually bonded with the refractory adhesive. Adhered by layer 102. Thereby, very excellent fire prevention performance can be obtained.

 [0086] Of course, it goes without saying that the structure of Embodiments 1 and 2 described above may be adopted for the door structure of the wooden fire doors IOC, 10D of the present embodiment.

 [0087] Here, the fire prevention performance of the wooden fire door according to the present invention will be described in more detail with reference to the following examples.

 Example 1

 First, a reinforcing member made of synthetic plywood was joined to the upper, lower, left and right end surfaces of a paulownia laminated material in which three layers of paulownia laminated wood were cross-bonded to form a core material having a thickness of 35 mm and 900 mm × 2200 mm.

Next, three pieces of Japanese paper having a thickness of 0.13 mm were prepared, and about 200 g / m ^{2 of} a fire-resistant adhesive containing an inorganic material composed of siloxane and silanol salt was applied to one surface of the core material. Refractory adhesive After a layer was formed and Japanese paper was pasted thereon, the same operation was repeated twice, so that each of the three Japanese papers was bonded with the fire-resistant adhesive layer. Next, a non-combustible material obtained by impregnating a 5.0-5.5 mm thick cedar wood with an effective component of a fire retardant containing boric acid at 5 g / 100 g of water was bonded thereto through a fire-resistant adhesive. . Similarly, on the opposite side of the core material, three pieces of Japanese paper were bonded with a fire-resistant adhesive layer, and the non-combustible material was bonded with a fire-resistant adhesive layer, and then the whole was press-bonded. As the refractory adhesive, an aqueous film-forming inorganic compound “Liquid Ceramic (LC) silica-based” (trade name; manufactured by Comix Corp.) was used.

 [0090] Next, after a fire-resistant adhesive layer was formed on each of the non-combustible materials on both sides, respectively, a Japanese paper was attached on the fire-resistant adhesive layer, and a further fire-resistant adhesive layer was further formed on the Japanese paper. Each formed. Thereafter, a decorative plate having a thickness of 2.7 mm and a size of 900 mm x 2200 mm was bonded thereon, and then the core material, the decorative plate, the non-combustible material, and the combustion delay member were press-bonded to each other. Wooden fire door.

 [0091] (Test example)

 The wooden fire door of Example 1 was burned with a flame of about 900 ° C. on average from one side, and a combustion test was performed for 60 minutes to evaluate the fire protection performance of the wooden fire door. The combustion test is a certification test by the Minister of Land, Infrastructure, Transport and Tourism based on “specified fire prevention equipment” based on ISO standards.

 [0092] As a result, even if the wooden fire door of Example 1 was burned from one side of the door with a flame of about 900 ° C for 60 minutes, the burning depth was about 15 mm, that is, 3/4 or more of the core remained. It was found that excellent fire protection performance was obtained. The temperature of the radiant heat transmitted from the side of the door flamed to the opposite side was about 40 ° C. This is probably because the flame retardant acts to fix the carbonized residue of the non-combustible material, and the refractory adhesive layer becomes an inorganic foam, which can block fire and heat for a long time.

 [0093] It was found that by interposing a combustion delay member between the core material and the decorative plate, extremely excellent fire protection performance was obtained. In addition, the wooden fire door of Example 1 achieved a fire protection performance of 60 minutes in an average 900 ° C combustion test based on ISO standards. Was able to pass.

[0094] Further, in the wooden fire door of Example 1, the core material remained as it was in the combustion test at 900 ° C / 60 minutes, so that it is clear that the fire protection performance of 60 minutes or more was obtained. It is. In addition, even if the burn retarding member between the incombustible material and the decorative board is removed, or even if the decorative board is directly press-bonded onto the burn retarding member without providing the incombustible material, similarly, 900 ° C / It is clear that a fire protection performance of 60 minutes can be obtained. Also, it is needless to say that the fire retarding performance of 900 ° C / 60 minutes can be similarly obtained by providing the fire retarding member only on one side to which the fire preventing performance is to be provided as a wooden fire door.

Claims

The scope of the claims  [1] In a wooden fire door having a wooden core and a decorative plate provided on the surface,  A wooden fire door, wherein at least one sheet-like combustion delay member having a fire-resistant adhesive layer on both surfaces is provided between the core material and the decorative board.  [2] The wooden fire prevention device according to claim 1, wherein the combustion delay member comprises two or more Japanese papers and the refractory adhesive layers provided between and on both sides of the Japanese paper. door.  [3] The wooden fire door according to claim 1 or 2, wherein the combustion delay member is press-bonded between plate members joined to both surfaces thereof. [4] In any one of claims 1-3, the combustion retarding member is provided between the core material and a non-combustible material obtained by impregnating a wood with a flame retardant, and the core material of the non-combustible material is provided. A wooden fire door, wherein the decorative panel is joined to a surface on a side opposite to the side. [5] The wooden fire door according to claim 4, wherein the combustion delay member is also provided between the incombustible material and the decorative board. 6. The wooden fire door according to claim 4, wherein the combustion delay member is also provided between the incombustible material and the decorative board. 7. The wooden fire door according to claim 4, wherein the flame retardant contains a flame retardant containing at least one of ammonium polyphosphate and boric acid.  [8] The wooden fire door according to claim 7, wherein the combustion retardant contains an inorganic material which is in a molten state during combustion to fix a carbonized residue. 9. The wooden fire door according to claim 8, wherein the inorganic material is made of at least one selected from the group consisting of a silicate, a borosilicate, a borate, and silica.  [10] The wooden fire door according to any one of items [11] to [9], wherein the decorative board is a wooden plywood impregnated with a wooden flame retardant.  [11] The wooden fire door according to any one of claims 110, wherein the core material is mainly made of paulownia material. [12] In any one of claims 1-11, the core material is a laminated board of paulownia laminated wood A wooden fire door characterized by the following.  13. The wooden fire door according to claim 12, wherein the core material is a three-layer cloth-clad laminate of the paulownia laminated wood. [14] The wooden fire door according to any one of claims 113, wherein a graphite foam material is provided in the vicinity of an end face of the door in a longitudinal direction thereof.