JPH0882167A - Wooden fire door - Google Patents

Abstract

PURPOSE: To enhance fire resistance of a wooden fire door and to make it possible to form it with thin construction by combining calcium silicate plates mixed with inorganic fibers and having different specific gravity and bending strength, and mounting decorated plywood on top and bottom end faces and right and left end faces. CONSTITUTION: As a first calcium silicate plate 3 mixed with inorganic fiber, an oblongly rectangular plate with 25mm thickness whose specific gravity is 0.25-0.30, bending strength is in excess of 4kgf/cm<2> is used. A heat sensitivity type graphite foamed material is mounted on the whole circumference of the first calcium silicate plate 3 to form a first plate body. As second calcium silicate plates 5 mixed with inorganic fibers, an oblong rectangular plate with 6mm thickness whose specific gravity is 0.8±0.1, and bending strength is in excess of 120kgf/cm<2> is used. The second calcium silicate plates 5 are mounted on the front and rear surfaces of the first plate body to form a second plate body. Decorative plywood 7 having the surface coated with a flame-retardant material with 4mm thickness is mounted on the front and rear surfaces, top and bottom end faces and right and left end faces of the second plate body to obtain a wooden door 1 with 45mm in thickness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wooden fire door which can be made thin and has excellent fire resistance.

[0002]

2. Description of the Related Art Conventional wooden fire doors are mainly made of a non-combustible material applied to a wooden door. Carbonization rate used for fire protection design of wood is 0.8 ± 0.1mm / mi
The wooden door is designed so that it can withstand the fire resistance test for the time specified in the Building Standards Law, taking into account the carbonization rate and other factors. On the other hand, the Building Standards Act was partially revised in 1990, and more stringent fireproof performance is required for wooden fire doors.

[0003]

Therefore, as a matter of course, the thickness of the door is increased as compared with the conventional ordinary wooden door, and as a result, the thickness of the door is up to 80 mm.
Therefore, the advent of a wooden door that is not suitable for practical use, has excellent fire resistance, and can be thinned has been desired. The present invention has been devised in view of the above circumstances, and an object of the present invention is to
It is to provide a wooden door that has excellent fire resistance and can be thin.

[0004]

In order to achieve the above object, a wooden fire door according to the present invention comprises a first calcium silicate board mixed with inorganic fibers and the first calcium silicate board mixed with inorganic fibers. A second calcium silicate plate different in specific gravity and bending strength from the calcium silicate plate and attached to both surfaces of the first calcium silicate plate, and an outer surface of the second calcium silicate plate and the first and second The second calcium silicate plate is characterized in that it is composed of the upper and lower end faces and the decorative plywood attached to the left and right end faces.

Further, in the present invention, the specific gravity of the first calcium silicate plate is smaller than that of the second calcium silicate plate, and the bending strength of the second calcium silicate plate is the first silicic acid. It is characterized by being larger than the calcium plate.

Further, the present invention is characterized in that a heat-sensitive graphite-based foamable material is disposed inside the decorative plywood attached to the upper and lower end surfaces and the left and right end surfaces.

[0007]

[Function] By combining calcium silicate plates mixed with inorganic fibers having different specific gravity and bending strength, the fireproof performance of the wooden fire door is improved and the thickness of the wooden fire door is reduced.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A is a front view of a wooden door according to the embodiment, and FIG.
1B is a side view of the same section, FIG. 1C is a bottom view of the same section, FIG. 2 is a sectional view taken along line XX of FIG. 1A, and FIG. 3 is a sectional view taken along line YY of FIG. FIG. 4 and FIG. 4 are sectional views taken along line ZZ of FIG. The wooden door 1 has a first calcium silicate board 3 and
A second calcium silicate plate 5 attached to both sides of the first calcium silicate plate 3, and a second calcium silicate plate 5
It is composed of a decorative plywood 7 and the like which is attached to the outer surface of the wooden door 1 and constitutes the surface of the wooden door 1.

The first calcium silicate plate 3 has a thickness of 25 mm and is formed in a vertically long rectangle. Inorganic fibers are mixed in the first calcium silicate plate 3, and glass fibers are used as the inorganic fibers in the embodiment.
In addition, as the inorganic fibers mixed in this way,
Rock wool etc. are mentioned. The first calcium silicate plate 3 mixed with glass fibers has a specific gravity of 0.25 to 0.30 and a bending strength of 4 Kgf / cm ² or more. First
The calcium silicate plate 3 mainly contributes to the fire resistance and heat insulation of the wooden door 1 and also contributes to weight reduction.

In the embodiment, as shown in FIGS. 2 to 4, heat is applied to the upper and lower end surfaces and the left and right end surfaces of the first calcium silicate plate 3, that is, the entire circumference of the first calcium silicate plate 3. The sensitive graphite-based foamable material 11 is attached, and thereby the first plate body 13 is formed. The thickness of the foamable material 11 is about 1.2 mm. Foamable material 11
Is foamed at the time of fire, absorbs heat from the surroundings when foaming to lower the ambient temperature, and after foaming, closes the gap between the wooden door 1 and the door frame to prevent the spread of flame. To function.

The second calcium silicate plate 5 has a thickness of 6 mm and is attached to the front and rear surfaces of the first plate body 13 to form a second plate body 15. Inorganic fibers are mixed in the second calcium silicate plate 5, and glass fibers are used as the inorganic fibers in the embodiment. Other examples of the inorganic fiber mixed in this way include rock wool and the like. The second calcium silicate plate 5 mixed with glass fibers has a specific gravity of 0.8 ± 0.1 and a bending strength of 120 Kgf / cm ² or more. The second calcium silicate plate 5 mainly contributes to the fire resistance and heat insulation of the wooden door 1 and also contributes to strength and rigidity.

The decorative plywood 7 has a thickness of 4 mm,
Attached to the front and rear surfaces, upper and lower end surfaces, and left and right end surfaces of the plate body 15 of
This gives a wooden door 1. As the decorative plywood 7, it is preferable to use one whose surface is coated with a flame-retardant material such as vinyl chloride. The thickness of the obtained wooden door 1 is 45 mm.

FIG. 5 (A) is a front view of the wooden door 1 in use, FIG. 5 (B) is a side view of the same section, FIG. 5 (C) is a bottom view of the same section, and FIG. 6 is a view of FIG. 5 (B). An enlarged view of the upper part is shown. As shown in FIG. 5, the wooden door 1 has handles 21 attached to the front and rear surfaces thereof, and is attached to a door frame 23 of a building frame so as to be openable and closable via a hinge. Mounting brackets 25 and 27 are attached to the upper and lower sides and left and right sides of the door frame 23, and a sinter-type fire-resistant gasket rubber 29 is attached to the portion of the upper and lower sides against which the wooden door 1 abuts. It is designed to prevent the rubber from falling off due to carbonization. In addition, a steel plate 3 having a thickness of 10 mm is provided at the center in the width direction on the upper surface of the fitting 25 located on the upper side.
1 is attached to prevent deformation of the door frame 23 due to heat.

According to the wooden door 1 according to the present embodiment, the fireproof performance of 60 minutes was exhibited with the thickness of 45 mm. Therefore,
A wooden door 1 having a small thickness and excellent fire resistance can be obtained, and the use of the wooden door 1 is advantageous from various points of view such as design and handling of a building.

[0015]

As is apparent from the above description, the wooden fire door according to the present invention has the first calcium silicate board mixed with inorganic fibers and the first calcium silicate mixed with inorganic fibers. A second calcium silicate plate different in specific gravity and bending strength from the plate and attached to both surfaces of the first calcium silicate plate; and an outer surface of the second calcium silicate plate and the first and second plates. It is composed of decorative plywood attached to the upper and lower end surfaces and left and right end surfaces of the calcium silicate board. Therefore, even if the thickness is thin, a wooden door with excellent fire resistance can be obtained, it is possible to prevent the door from burning out in the case of a flame, and it is possible to reduce the thickness of the door and prevent the corners of the door from burning. Become.

[Brief description of drawings]

FIG. 1A is a front view of a wooden door according to an embodiment,
1B is a side view of the same section, and FIG. 1C is a bottom view of the same section.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a sectional view taken along the line YY of FIG.

FIG. 4 is a sectional view taken along line ZZ of FIG.

FIG. 5 (A) is a front view of a wooden door in use, FIG. 5 (B) is a side view of the same section, and FIG. 5 (C) is a bottom view of the same section.

FIG. 6 shows an enlarged view of the upper part of FIG.

[Explanation of symbols]

 1 Wooden Door 3 First Calcium Silicate Board 5 Second Calcium Silicate Board 7 Decorative Plywood 11 Foaming Material

Claims (3)

[Claims] 1. A first calcium silicate plate mixed with inorganic fibers and a first calcium silicate plate mixed with inorganic fibers have different specific gravities and bending strengths. Second calcium silicate plates attached to both surfaces, and decorative plywood attached to the outer surface of the second calcium silicate plate and the upper and lower end surfaces and left and right end surfaces of the first and second calcium silicate plates And a wooden fire door made of. 2. The specific gravity of the first calcium silicate plate is smaller than that of the second calcium silicate plate, and the specific gravity of the second calcium silicate plate is smaller than that of the second calcium silicate plate.
The wooden fire door according to claim 1, wherein the calcium silicate board has a bending strength higher than that of the first calcium silicate board. 3. A wood fire door according to claim 1, wherein a heat-sensitive graphite-based foamable material is disposed inside the decorative plywood attached to the upper and lower end surfaces and the left and right end surfaces.