JP2020186599A - Heat proof structure of fire proof panel - Google Patents

Abstract

To provide a heat proof structure of a fire proof panel in which an inside is not burned by transmission of heat from a fire proof panel to a substrate material without making a substrate material thick.SOLUTION: A heat proof structure of a building in which a fire proof panel is attached as a finishing material of an outer wall comprises: a substrate material in which a structural plywood is fitted to a column material; and a plurality of ventilation furring strips intermittently disposed between the material and the fire proof panel. The ventilation furring strip includes: a metal plate which is in contact with the fire proof panel and whose both ends are folded backwardly; and an incombustible material which is arranged inside the metal plate so that the metal plate is not in contact with the substrate material. An outer machine screw joining the fire proof panel to the metal plate and an inner machine screw joining from the metal plate through the incombustible material to the column material of the substrate material are separated from each other.SELECTED DRAWING: Figure 1

Description

The present invention relates to a heat resistant structure of a refractory panel that prevents heat from being conducted from the refractory panel to the base material and burning inside.

When a wooden building has a heat-resistant structure, a fire-resistant panel is attached to the base material via a ventilation furring strip. As the base material, a structural facing material in which a heat insulating material or a non-combustible material is attached to a pillar material is used, and wood or metal is used as a ventilation furring strip. In the event of a fire or the like, the refractory panel itself does not burn, but heat may be conducted to the metal screws that hold the refractory panel to the ventilation furring strip, causing the ventilation furring strip and base material to burn.

Therefore, structural plywood, which is made by stacking multiple layers of non-combustible material and fastening them with different metal screws, is used as the base material to prevent the formation of thermal bridges from the surface of the refractory panel to the inside of the base material. In some cases. As described in Patent Document 1, an invention relating to an outer heat insulating fireproof structure of an outer wall that is provided with fireproof performance against a fire from the outside is also disclosed.

In addition, a metal ventilation furring strip is used to prevent the ventilation furring strip from burning, and the metal screw that fastens the fireproof panel to the ventilation furring strip and the metal screw that fastens the ventilation furring strip to the base material may be separated. is there. As described in Patent Document 2, an invention relating to a fixed structure of a metal spacer and an outer wall finishing material used for a metal base material for an outer wall finishing material that does not cause deterioration of heat insulating performance is also disclosed.

Japanese Patent No. 5823268 Japanese Patent No. 3623929

However, in the invention described in Patent Document 1, if the number of non-combustible materials is large, it is possible to suppress heat from reaching the inside, but the thickness of the base material is increased, so that in a place where buildings are densely packed. , It may not be possible to secure the distance from the adjacent building. Further, in the invention described in Patent Document 2, when a metal having a high thermal conductivity is used as the ventilation furring strip, the heat of the metal screw that holds the fireproof panel is conducted to the metal screw that holds the base material.

Therefore, an object of the present invention is to provide a heat-resistant structure of a refractory panel in which heat is conducted from the refractory panel to the base material and the inside is not burned without thickening the base material.

In order to solve the above problems, the present invention is a heat-resistant structure of a building to which a fire-resistant panel is attached as a finishing material for an outer wall, and is a base material in which a structural plywood is struck on a pillar material, and the base material and the fire resistance. A plurality of intermittently arranged ventilation furring strips are provided between the panels, and the ventilation furring strips include a metal plate that is in contact with the fireproof panel and has both ends bent rearward, and the metal plate is the base. It has an incombustible material internally installed in the metal plate so as not to come into contact with the material, an outer screw for fastening the fireproof panel to the metal plate, and a pillar material of the base material through the incombustible material from the metal plate. It is characterized in that it is separated from the inner screw to be fastened.

Further, in the heat-resistant structure of the refractory panel, the metal plate is characterized in that the noncombustible material is supported by an inner burr formed inside when a side hole is formed in a side plate whose both ends are bent.

Further, in the heat-resistant structure of the refractory panel, the metal plate is characterized in that the non-combustible material is sandwiched by inclining the side plates with both ends bent inward.

Further, in the heat-resistant structure of the refractory panel, the non-combustible material is characterized in that both ends of the metal plate are projected rearward from the bent side plates.

According to the present invention, it is possible to prevent heat from being conducted from the refractory panel to the base material and burning inside without thickening the base material. That is, even in a place where buildings are densely packed, it is possible to secure a distance from an adjacent building. Further, even if a metal having a high thermal conductivity is used as the ventilation furring strip, it is possible to prevent the heat of the metal screw that holds the refractory panel from being conducted to the metal screw that holds the base material.

It is a top view, a front view and a side view which show the outer wall which has the heat-resistant structure of the refractory panel of this invention. It is a top view, a front view and a side view which show the ventilation furring strip in the heat-resistant structure of the refractory panel of this invention. It is a top view, a front view and a side view which show the ventilation furring strip in the heat-resistant structure of the refractory panel of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Those having the same function are designated by the same reference numerals, and the repeated description thereof may be omitted.

The heat-resistant structure of the refractory panel of the present invention will be described. 1A and 1B are a plan view showing an outer wall having a heat-resistant structure of a refractory panel, a front view (permeation of the refractory panel), and a side view. 2 and 3 are (a) a plan view, (b) a front view, and (c) a side view showing a ventilation furring strip in a heat-resistant structure of a refractory panel. The side facing the outside of the building is the front (front), and the side facing the inside of the building is the back (rear).

As shown in FIG. 1, for example, when the outer wall 100 of a building constructed by the wooden frame wall construction method is to have fire resistance, a fire resistant panel 200 is used as a bearing wall. As the outer wall 100, a plurality of ventilation furring strips 300 are intermittently arranged on the front side of the base material 400, and then a fireproof panel 200 is attached to the surface as a finishing material.

The fireproof panel 200 is a siding (finishing material) having fire resistance using a fireproof material such as a noncombustible material, a semi-incombustible material, or a flame-retardant material. For example, magnesium is used as a main raw material and glass fiber or the like is used. There are reinforced magnesium plates and the like.

As the base material 400, for example, a structural plywood 410 is arranged in parallel on the front side and a noncombustible board 440 is arranged in parallel on the back side, and a plurality of pillar materials 420 are intermittently arranged between them, and a heat insulating material 430 is provided in a gap between the pillar materials 420. It is a structural facing material used as a base for a bearing wall with improved earthquake resistance, wind resistance, fire resistance, heat insulation, airtightness and soundproofing by filling with.

The structural plywood 410 is a plate material that has resistance to forces from all directions by stacking and adhering a plurality of single plates, and has a high nail holding force. A pillar material 420 is fixed to the back surface of the structural plywood 410 with an adhesive or the like, and an inner screw 210 or the like is struck on the front surface to arrange a ventilation furring strip. As the adhesive, for example, a phenol-based adhesive that is resistant to water may be used.

A moisture permeable waterproof sheet 450 may be attached to the surface of the structural plywood 410 to provide waterproof treatment. The moisture-permeable waterproof sheet 450 is a sheet that does not allow water to pass through but allows moisture to pass through, such as a polyethylene non-woven fabric, and discharges the moisture in the base material 400 to the gap 460 to prevent dew condensation.

The non-combustible board 440 is a plate material using a fireproof material such as a non-combustible material, a semi-incombustible material or a flame-retardant material, and for example, a gypsum board or a calcium silicate board may be used. It is desirable not to burn for 5 minutes or more, preferably 20 minutes or more after the start of heating.

Examples of the pillar material 420 include pillars that support the building on the outer wall 100 and studs that are arranged between the pillars for attaching the outer wall 100. In addition, nails and the like are driven in according to the position of the pillar material 420.

The heat insulating material 430 reduces heat transfer and heat transfer, and includes glass wool, rock wool (fiber type), urethane foam (foam type), and the like. By putting it so as to block the space between the pillars 420, the heating and cooling inside the building will be made more efficient.

A plurality of ventilation furring strips 300 are intermittently arranged between the base material 400 and the refractory panel 200 in order to secure a gap 460 as a ventilation layer. The ventilation furring strip 300 is arranged at the position of the pillar material 420, and is struck against the base material 400 by the inner screw 210. Further, the fireproof panel 200 is struck against the ventilation furring strip 300 by the outer screw 220.

As the inner screw 210, a long wooden screw may be used so that it can be deeply driven into the pillar material 420. Further, as the outer screw 220, a short steel frame screw may be used so as to punch out and fix the metal plate 310.

As shown in FIG. 2, the ventilation furring strip 300 has a metal plate 310 on the side that comes into contact with the fireproof panel 200 and a noncombustible material 500 on the side that comes into contact with the base material 400. The metal plate 310 is provided with side plates 330 by bending both ends rearward, and a noncombustible material 500 such as mortar is internally provided so as to fill the inside. The rear surface 510 of the non-combustible material 500 is projected rearward from the side plate 330 so that the metal plate 310 does not come into contact with the base material 400.

The metal plate 310 is a plate material that has been bent into a substantially rectangular shape using a hot-dip zinc-aluminum-magnesium alloy plated steel sheet (for example, 91% zinc, 6% aluminum, 3% magnesium) having high corrosion resistance.

The contact surface 320 of the metal plate 310 is in contact with the back surface of the refractory panel 200, penetrates the refractory panel 200, and is fastened with an outer screw 220. The recess 320a of the metal plate 310 is recessed behind the contact surface 320, and a plurality of retaining holes 340 are intermittently opened. When the inner screw 210 is passed through the retaining hole 340 and fixed from the noncombustible material 500 to the base material 400, the head of the inner screw 210 fits in the recess 320a.

The position where the outer screw 220 is driven and the position where the inner screw 210 is driven are separated as much as possible. When the surface of the refractory panel 200 is heated by a fire or the like, the exposed outer screw 220 may become hot, but heat conduction is performed up to the inner screw 210 driven at a position away from the outer screw 220. Since it is suppressed, the pillar material 420 of the base material 400 is prevented from burning.

Since the outer screw 220 is short, it reaches only the non-combustible material 500 and does not conduct heat to the base material 400. The diameter of the retaining hole 340 may be increased so that heat is not conducted from the outer screw 220 to the inner screw 210 via the metal plate 310, and the inner screw 210 may be driven into the noncombustible material 500 so as not to come into contact with the metal plate 310.

The side plate 330 of the metal plate 310 presses the incombustible material 500 installed internally. A plurality of side holes 350 are formed in the side plate 330 to allow heat and moisture to pass therethrough and to reduce the weight of the metal plate 310. When punching the side hole 350 from the outside to the inside, an inner burr 360 is formed inside. Therefore, the non-combustible material 500 may be supported by the protrusion formed by the inner burr 360.

As shown in FIG. 3, in the ventilation furring strip 300a, both the side plates 330a of the metal plate 310 are inclined inward and the tip is narrowed in a tapered shape to sandwich the incombustible material 500 installed inside. You may.

According to the present invention, it is possible to prevent heat from being conducted from the refractory panel to the base material and burning inside without thickening the base material. That is, even in a place where buildings are densely packed, it is possible to secure a distance from an adjacent building. Further, even if a metal having a high thermal conductivity is used as the ventilation furring strip, it is possible to prevent the heat of the metal screw that holds the refractory panel from being conducted to the metal screw that holds the base material.

Examples of the present invention have been described above, but the present invention is not limited thereto.

100: Outer wall 200: Fireproof panel 210: Inner screw 220: Outer screw 300: Ventilation furring strip 300a: Ventilation furring strip 310: Metal plate 320: Contact surface 320a: Recessed 330: Side plate 330a: Side plate 340: Retaining hole 350: Side Hole 360: Inner burr 400: Base material 410: Structural plywood 420: Pillar material 430: Insulation material 440: Non-combustible board 450: Moisture permeable waterproof sheet 460: Gap 500: Non-combustible material 510: Rear surface

In order to solve the above problems, the present invention is a heat-resistant structure of a fire-resistant panel in a building to which a fire-resistant panel is attached as a finishing material for an outer wall, and a base material in which a structural plywood is struck on a pillar material and the base material. A plurality of intermittently arranged ventilation furring strips are provided between the fireproof panel and the ventilation furring strips are a metal plate that is brought into contact with the fireproof panel and has both ends bent rearward, and the metal plate. Has an incombustible material filled inside the metal plate so as not to come into contact with the base material, and has an outer screw for fastening the fireproof panel to the metal plate in contact with the metal plate, and the metal plate is recessed rearward. a bis-inner keep up pillar of the ground material through said incombustible material, is separated from the outer screw to prevent heat conduction in said screw through said metal plate, it is characterized.

In order to solve the above problems, the present invention is a heat-resistant structure of a fire-resistant panel in a building to which a fire-resistant panel is attached as a finishing material for an outer wall, and a base material in which a structural plywood is struck on a pillar material and the base material. A plurality of intermittently arranged ventilation furring strips are provided between the fireproof panel and the ventilation furring strips are a metal plate that is brought into contact with the fireproof panel and has both ends bent rearward, and the metal plate. Has a non-combustible material filled inside the metal plate so as not to come into contact with the base material, and the non- combustible material is a mortar, and an external screw for fastening the fire-resistant panel to the metal plate in contact with the metal plate. The metal plate is recessed rearward to form a recess, and the inner screw is driven into the base material through the non-combustible material so as not to come into contact with the metal plate through a retaining hole having a predetermined diameter provided in the recess. and through the metal plate from the outer screw is separated so as not to heat conduction in said screw, characterized in that.

Claims (4)

It is a heat-resistant structure of a building with a fireproof panel attached as a finishing material for the outer wall.
A base material with structural plywood struck on the pillar material,
A plurality of ventilated furring strips intermittently arranged between the base material and the refractory panel are provided.
The ventilation furring strip includes a metal plate that is brought into contact with the fireproof panel and has both ends bent rearward, and a noncombustible material that is internally provided in the metal plate so that the metal plate does not come into contact with the base material. Have and
The outer screw that fastens the fireproof panel to the metal plate and the inner screw that fastens the fireproof panel to the pillar material of the base material through the noncombustible material are separated from each other.
The heat-resistant structure of the fire-resistant panel is characterized by this. The metal plate supports the non-combustible material with an inner burr formed inside when a side hole is formed in the side plate whose both ends are bent.
The heat-resistant structure of the fire-resistant panel according to claim 1. The metal plate sandwiches the non-combustible material by inclining the side plates with both ends bent inward.
The heat-resistant structure of the fire-resistant panel according to claim 1. The non-combustible material is projected rearward from the side plate in which both ends of the metal plate are bent.
The heat-resistant structure of the fire-resistant panel according to any one of claims 1 to 3, wherein the fire-resistant panel is characterized in that.

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