JPH08326436A - Wood frame for fire doors - Google Patents

Abstract

(57) [Summary] [Purpose] A wooden frame for fire doors that has sufficient material strength, high nail holding power, and can be manufactured at low cost without impairing the original wooden texture, design, and warmth. [Structure] Laminated wood or laminated veneer or plywood as core material,
For fire doors with an intermediate layer of a fire-resistant sheet of inorganic powder, inorganic fibers and a binder with a specific gravity of 0.7 or more and a thickness of 0.5-3 mm, and a face material such as natural wood veneer or decorative plywood as the surface layer. Wood frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wooden frame for a fire door, which is lightweight and is used in openings of general houses, apartment houses, hotels, public facilities and the like.

[0002]

2. Description of the Related Art Conventionally, metal door frames have been the mainstream for door frames for fire doors used for openings in general houses, hotels, apartments, public facilities and the like. There is a problem that the metal door frame lacks wood texture, warmth, and lacks in designability, and is generally heavy because it is filled with mortar and has poor workability. In recent years, with the advent of wood fire doors, wood frames made of flame-retarded wood impregnated with or coated with a phosphoric acid-based or boric acid-based flame retardant have come to be manufactured. However, although these wooden frames have wood texture and warmth compared to metal frames, due to the difficulty of flame-retardant treatment, the selection of wood is limited and it is not possible to sufficiently use wood with excellent surface design. It was Further, the flame-retardant treatment lowers the strength of the frame material, weakens the nail holding power, does not necessarily have sufficient workability and durability, and is still expensive.

[0003]

DISCLOSURE OF THE INVENTION An object of the present invention is to provide a fire door which has sufficient material strength, high nail holding power, and can be manufactured at low cost without impairing the original wooden texture, design, and warmth of the wooden frame. The purpose is to provide a wood frame.

[0004]

[Means for Solving the Problems] The above-mentioned problems are obtained by using a laminated material or a single plate laminated material or plywood according to the present invention as a core material, and having a specific gravity of 0.7 or more and an inorganic powder, an inorganic fiber and a binder and a thickness of ．
This is solved by a wood frame for a fire door, which has a fire resistant sheet of 5 to 3 mm as an intermediate layer and a face material such as natural wood veneer or decorative plywood as a surface layer.

The core material according to the present invention is a laminated material or a rotary race, which is made of a general material obtained by laminating and adhering a sawn plate or a small square member in the direction of thickness, width and length with their fiber directions being substantially parallel to each other. It is a veneer core plywood of three or more plies in which the veneers of the adjacent veneers are generally orthogonal, or the veneers of the veneers that are in contact with each other are generally orthogonal, with the veneers cut by a slicer or the like having their fiber directions substantially parallel to each other.

The refractory sheet forming the intermediate layer of the present invention comprises an inorganic powder, an inorganic fiber and a binder. The inorganic powder forming the refractory sheet is for increasing hardness and surface performance while maintaining fire resistance, for example, calcium carbonate, silica, micro silica, mica, aluminum hydroxide or a heat insulating layer by heating. Examples include ammonium phosphate and carbon graphite that form,
These may be used alone or in combination of two or more. The composition ratio of the inorganic powder in the refractory sheet is 20 to 7
It is preferably 0% by weight. If it is less than 20% by weight, the desired surface hardness cannot be obtained, and if it exceeds 70% by weight, the desired strength cannot be obtained because the proportion of the inorganic fibers is relatively reduced.

The inorganic fibers forming the refractory sheet include
Examples thereof include glass fibers and magnesium silicate fibers, which can be used alone or in combination of two or more kinds. The composition ratio of the inorganic fibers in the fireproof sheet is 30 to 80% by weight. If the amount is less than 30% by weight, the desired strength cannot be obtained and the fire resistance decreases unless the amount of the binder is increased. If it exceeds 80% by weight, the amount of the inorganic powder to be added decreases, and the desired surface hardness cannot be obtained.

Examples of the binder for the fireproof sheet include synthetic resins such as acrylic resin, polyester resin, melamine resin and phenol resin, starch and the like, and in order to obtain the desired fire resistance, it is necessary to use 35% by weight or less. .

The specific gravity of the refractory sheet is preferably 0.7 or more. Generally, when the composition and thickness of the refractory sheet are constant, there is a positive correlation between the specific gravity of the refractory sheet, the surface hardness, and the tensile strength.As the specific gravity of the refractory sheet increases, the surface hardness and bending strength of the refractory sheet increase. This is because the specific gravity of the refractory sheet needs to be 0.7 or more in order to increase and obtain the desired surface hardness and bending strength. The thickness of the fire-resistant sheet is preferably 0.5 to 3 mm, and if it is thinner than 0.5 mm, the fire resistance is insufficient. If it exceeds 3 mm, the fire resistance is sufficient but the lapping process becomes difficult.

The refractory sheet is produced by a method in which an inorganic powder, an inorganic fiber and a binder are dispersed and suspended in water to obtain an aqueous slurry, which is wet paper-formed, pressed and then dried to obtain an SMC. An existing manufacturing method such as a dry method such as an impregnation machine can be selected. A face material such as natural wood veneer or decorative plywood is bonded to the surface of the obtained fireproof sheet.

Face materials such as natural wood veneer and decorative plywood used for the wood frame for fire doors of the present invention include rotary veneer, half round veneer, sliced veneer, sawn veneer and the like obtained by cutting wood. It is a natural wood decorative board with a veneer laminated on the surface for the purpose of expressing the aesthetics peculiar to wood materials, and the surface of ordinary plywood that has undergone processing such as painting, overlay, print, painting etc. It has been processed. The adhesive for adhering the face material to the intermediate layer fire-resistant sheet is an organic adhesive such as phenol-based, resorcinol-based, melamine-based, urea-based, vinyl acetate-based, epoxy-based, synthetic rubber-based, urethane-based, etc. It is an inorganic adhesive such as water glass. The refractory sheet and the face material are adhered to each other by applying an adhesive on one or both sides by an existing method such as a spreader or a spray, and pressing with a hot press, a cold press, a vacuum press or the like.

The wood frame for a fire door of the present invention does not undergo flame-retardant treatment to reduce the strength of the frame material, and has a sufficient strength of laminated wood or veneer laminate or plywood as a core material and a fireproof sheet as an intermediate layer. Although the face material is adhesively laminated as a surface layer, it is efficient that the fire resistant sheet and the face material are adhesively laminated in advance, and then the core material is adhered so as to wrap and the joint wrapping is performed. However, if necessary, the face material may be adhesively laminated after the core material is first bonded and lapped by the intermediate layer of the refractory sheet.

Adhesives for bonding and lapping the intermediate layer of the refractory sheet to the core material are phenol type, resorcinol type, melamine type, urea type, vinyl acetate type, epoxy type, synthetic rubber type, urethane type adhesives, water glass, etc. It is an inorganic adhesive. The method of joining and lapping the intermediate layer of the refractory sheet to the core material is performed by applying an adhesive on one or both sides by an existing method such as a spreader or a spray and pressing with a hot press, a cold press, a vacuum press or the like.

[0014]

The laminated wood or veneer laminate or plywood used as the core material in the wood frame for fire doors of the present invention does not require flame-retardant treatment to reduce strength, and has sufficient frame material strength and nail holding power. The fireproof sheet having the original properties of a wooden frame and having a specific gravity of 0.7 or more and a thickness of 0.5 to 3 mm used as an intermediate layer has sufficient surface hardness and strength as a fireproof layer, and is used as a surface layer. Face materials such as natural wood veneer and decorative plywood are not limited by wood materials, and have wood texture, warmth, and excellent surface design. A wooden frame for fire doors that integrates such core properties, intermediate layers, and surface layers by interacting with such excellent properties is inexpensive and has sufficient frame material strength, nail holding power, excellent fire resistance.
Shows fire resistance, original wood texture, warmth, and high design.

[0015]

【Example】

[Embodiment 1] An embodiment of the present invention will be described with reference to FIG. Aluminum hydroxide (average particle size 45μ) 20% by weight as inorganic powder, magnesium silicate fiber (sepiolite) 65% by weight as inorganic fiber, glass fiber (fiber length 12 mm) 10% by weight, acrylic resin and starch as binder A total of 5% by weight is added and mixed in water to obtain an aqueous slurry, which is formed into paper, pressed by a press, and then dried to form an intermediate layer. Sheet 2 was obtained. A natural wood decorative plywood (thickness: 2.5 mm) was bonded as a face material 3 to the surface of the fireproof sheet 2 with an adhesive (Resorcinol adhesive manufactured by Dainippon Ink and Chemicals, Inc.) to form an outer layer portion. Next, an adhesive (Resorcinol adhesive manufactured by Dainippon Ink and Chemicals Co., Ltd.) is used as the core material 1 on the fireproof sheet 2 of the outer layer part with a frame prospective 126 mm, a found 35 mm, and a door stop thickness of 16 mm as the core material 1. ) Was used to obtain a wood frame for a fire door of the present invention.

[Example 2] Polyester resin (FG-387 manufactured by Dainippon Ink and Chemicals, Inc.) as a binder 10
A resin liquid obtained by mixing 0 part by weight of 150 parts by weight of aluminum hydroxide (average particle size: 17 μ) as an inorganic powder, 15 parts by weight of graphite and 1 part by weight of benzoyl peroxide as a curing agent was used as an E glass chopped strand. (Length 2
Inch) Mat (PU-538 manufactured by Nitto Boseki Co., Ltd.) 30
After impregnating 100 parts by weight per part by weight, the upper and lower surfaces of the PET film were coated with two PET films and heated at 120 ° C. for 15 minutes to obtain a fireproof sheet having a thickness of 1.5 mm and a specific gravity of 1.3. . A wood frame for a fire door of the present invention was obtained in the same manner as in Example 1 except that the fire resistant sheet was used.

The physical properties of the wood frames for fire doors obtained in Examples 1 and 2 were measured and shown in Table 1. Fire resistance: Fire resistance 1 hour heating test specified by Ministry of Construction Notification No. 1125. Nail holding power: Measured according to JIS Z 2121.

[0018]

[Table 1]

[0019]

As described above, the wood frame for a fire door of the present invention is excellent in fire resistance, and a face material such as a natural wood veneer or a decorative plywood can be joined to the surface of the wood without being restricted by the wood material. It has an original wooden texture, warmth and excellent design, and can be effectively used as a general house, apartment house, hotel, public facility. Moreover, unlike metal door frames, it is lightweight because it is not filled with mortar, which makes loading and unloading and adjustment of doors easy at the construction site, and construction is easy, and phosphoric acid, boric acid, etc. Since it does not use wood impregnated with a combustion agent, it has excellent nailing properties and strength, and is inexpensive.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional explanatory view of a wood frame for a fire door of the present invention.

FIG. 2 is a front view of the wooden frame for a fire door and the fire door of the present invention.

[Explanation of symbols]

 1: Core material 2: Fireproof sheet 3: Face material 4: Wood frame for fire doors

Claims (1)

[Claims] 1. A specific gravity of 0.7 comprising an inorganic powder, an inorganic fiber, and a binder, with a laminated material, a single plate laminated material or plywood as a core material.
A wood frame for a fire door, characterized in that the fire-resistant sheet having a thickness of 0.5 to 3 mm is used as an intermediate layer and a face material such as a natural wood veneer or a decorative plywood is used as a surface layer.