JPH07293127A - Wooden fire door - Google Patents

Abstract

PURPOSE:To provide a wooden fire door excellent in fire resistance and shape holding property against heat and light in weight. CONSTITUTION:A flame retardant paulownia material which is rare for deformation to occur in it and less in specific gravity is used for a core material 10 of a main member forming a door so as to reduce the weight of a wooden fire door and prevent it from burning completely with its core part and from being deformed. Also a decorative plate 30 is stuck on the front and rear surfaces of the core material 10 through a noncombustible paper 40. Thus the fire resistance of the wooden fire door is increased by the use of the noncombustible paper 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wood fire door using wood as a main constituent member.

[0002]

2. Description of the Related Art The inventor of the present invention has already disclosed in Japanese Patent Laid-Open No. 1403/1992
A wooden fire door as described in the '90 publication has been developed.

As shown in FIG. 3, this wooden fire door has a core 10 made of particle board made by pressing wood powder such as beech, birch, oak, zelkova with an adhesive.
The flame-retardant fireproof board 2 is provided on the front and back surfaces of the core material 10.
A decorative plate 30 such as a veneer plate is attached to each of the two via a 0.

[0004]

However, the above wooden fire door has a height of 2,100 mm and a width of 900 to 950.
mm × thickness 40 to 43 mm of normal size, the weight is 50 to 60 kg, and the wooden fire door is attached to the pillars in the room by using hinges, etc. When transporting to the upper floors of a building, it was necessary for two or more workers to support and lift the wooden fire door, which required a great deal of labor and labor.

Therefore, the present inventor, after earnest research, can reduce the weight of the wooden fire door by using a flame-retardant wood having a small specific gravity for the core material 10 of the main member of the wooden fire door. It was thought that the installation work and transportation work of the wooden fire door could be facilitated, and when searching for the wood used for the core material 10 for that purpose, it was found that the paulownia wood was the most suitable. Based on the findings, we developed a lightweight fireproof wooden fire door.

That is, an object of the present invention is to provide a lightweight wooden fire door (hereinafter referred to as a fire door) using wood as a core material of a main member of the door.

[0007]

In order to achieve the above object, the fireproof door of the present invention is characterized by using a paulownia wood as a core material of a main member constituting the door.

The fireproof door of the present invention is preferably formed by adhering decorative plates to the front and back surfaces of a core made of paulownia wood with non-combustible paper, respectively.

At the same time, in the fireproof door of the present invention, non-combustible paper is adhered to the front and back surfaces of the core material by using a flame-retardant adhesive, and a decorative plate is flame-retarded to the surface of the non-combustible paper. It is preferable to apply the agent using an agent.

[0010]

[Function] The specific gravity of paulownia wood is 0.3 to 0.4, which is 0.65 to 0.9 as compared with the specific gravity of commonly used wood such as beech, mackerel, oak, zelkova, etc. that compose particle boards. , Significantly smaller.

The thermal conductivity of paulownia wood is 0.063 Kcal /
beech which is mh ° C. and constitutes a particle board,
It is significantly lower than the thermal conductivity of 0.117 to 0.123 Kcal / mh ° C, which is the heat conductivity of commonly used wood such as citrus mackerel, Japanese oak, and zelkova. That is, paulownia wood is difficult to transfer heat.

[0012] Therefore, even if the paulownia wood ignites, its burning speed is slower than that of other commonly used woods such as other beech, birch, Japanese oak, and zelkova, and it burns completely up to its core. It is empirically known to be time consuming and flame retardant.

In the fireproof door of the present invention, since the flame-retardant paulownia material having a small specific gravity as described above is used as the core material of the main member constituting the door, the weight of the fireproof door can be reduced. At the same time, when the building catches a fire, the fireproof door can be prevented from completely burning up to its core portion by the core material made of flame-retardant paulownia wood.

It is known that paulownia wood has remarkably small moisture absorption and water absorption, and the values of shrinkage and expansion with the change of water content are extremely small. That is, the paulownia wood does not significantly distort even when heated, and has excellent heat-resisting shape retention.

In the fireproof door of the present invention, since the paulownia wood that does not greatly distort even when heated is used as the core material of the main member that constitutes the door, the building is suitable for fire and the like. At this time, the fire door is heated and greatly distorted, and a gap is created between the fire door and the door frame or pillar that supports it, and flames, smoke, etc. leak out from the gap to the opposite side of the fire door. It can be prevented.

[0016]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 shows a preferred embodiment of the fire door of the present invention, more specifically, a partial side sectional view thereof. The fire door will be described below.

In the illustrated fireproof door, the core material 10 is made of paulownia wood. Specifically, a paulownia laminated wood or a paulownia board is used for the core material 10, which is a collection of paulownia wood pieces and paulownia thinned wood that are discharged when the paulownia wood is processed into a board. .

Decorative plates 30 are attached to the front and back surfaces of the core material 10 via non-combustible paper 40, respectively.

The non-combustible paper 40 is, for example, GRANDEX (trade name) non-combustible paper manufactured by Tokiwa Denki Co., Ltd. (a non-asbestos inorganic sheet containing magnesium silicate as a main component, which is superior in non-combustibility to aluminum hydroxide paper, It has heat-resisting shape retention).

The non-combustible paper 40 is attached to the front and back surfaces of the core material 10 made of paulownia wood by using, for example, a vinyl urethane-based water-based adhesive.

The decorative plate 30 is, for example, a decorative plate made by laminating a thin veneer plate on the surface of lauan plywood.

The decorative plate 30 is attached to the surface of the nonflammable paper 40 by using, for example, a vinyl urethane-based water-based adhesive.

The fire door shown in FIG. 1 is constructed as described above.

According to the test results, the above-mentioned G is formed on the front and back surfaces of the core material 10 having a thickness of 35 mm formed by laminating paulownia lumber in three layers.
A thickness of 2.5 which is obtained by adhering a veneer veneer on the surface of the lauan plywood through a non-combustible paper 40 made of RANDEX non-combustible paper.
The 40 mm-thick fireproof doors formed by adhering the 30 mm mm decorative plates 30 to each other using the above vinyl urethane-based water-based adhesives continuously irradiate the door surface with a flame of around 800 ° C. for about 20 minutes, and then the fireproofing thereof is performed. It was found that it can pass the Class B fire door test by the Housing Bureau of the Ministry of Construction, which inspects for the presence or absence of sex.

At the same time, the fire door has a height of 2, 1
00 mm x width 900 to 950 mm x thickness 40 to 43 mm
It was found that the weight is about 36 kg and the weight can be reduced by about 40% compared with the fire door shown in FIG. 3 described above.

In the above fireproof door, a flame-retardant adhesive is used as the adhesive for sticking the non-combustible paper 40 on the front and back surfaces of the core material 10 and the adhesive for sticking the decorative plate 30 on the surface of the non-combustible paper 40. It is preferable to use the core material 10 and the non-combustible paper 40 and the decorative plate 30 which are sequentially adhered to the front and back surfaces of the core material 10 by using an adhesive, as shown in FIG. It is convenient to form the flame-retardant adhesive layer 50 between the non-combustible paper 40 and the non-combustible paper 40 and between the non-combustible paper 40 and the decorative plate 30 to improve the fire resistance of the fire door.

As the flame-retardant adhesive, for example, one type of neutral α-olefin resin adhesive, Aika Kratack V-3080 (trade name) manufactured by Aika Kogyo Co., Ltd. may be used.

Further, in the above fireproof door, as shown in FIG. 2, the core material 10 made of paulownia wood is formed thick to enhance the fire resistance and heat-resistant shape retention of the core material 10. The decorative plates 30 may be directly adhered to the front and back surfaces of the non-combustible paper 40 without interposing the non-combustible paper 40, and even in such a case, the core material 10 of the main member constituting the fire door has a flame-retardant specific gravity. By using a paulownia wood having a small size, it is possible to form a lightweight fireproof door having fire resistance and heat-resistant shape retention.

[0029]

As described above, according to the fireproof door of the present invention, even if it is heated by a flame or the like, the fireproof door is excellent in fire resistance and heat shape retention, and can keep its original shape without distortion. Can provide doors.

At the same time, the weight of the fire door can be greatly reduced, and the work of mounting and carrying the fire door can be greatly facilitated.

[Brief description of drawings]

FIG. 1 is a partial side sectional view of a fire door of the present invention.

FIG. 2 is a partial side sectional view of the fire door of the present invention.

FIG. 3 is a partial side sectional view of a conventional fire door.

[Explanation of symbols]

 10 Core Material 20 Fireproof Board 30 Decorative Board 40 Nonflammable Paper 50 Adhesive Layer

Claims (3)

[Claims] 1. A wood fireproof door characterized in that paulownia wood is used as a core material of a main member constituting the door. 2. A wooden fire door in which decorative plates are attached to the front and back surfaces of a core material made of paulownia wood with non-combustible paper, respectively. 3. A non-combustible paper is attached to each of the front and back surfaces of the core material with a flame-retardant adhesive, and a decorative plate is attached to each surface of the non-combustible paper with a flame-retardant adhesive. The wooden fire door of claim 2.