JP4044691B2 - Fire spread prevention structure and fire spread prevention material - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a fire spread prevention structure in which a fire spread prevention material is attached in an air flow passage formed between a wall structure and an outer wall panel, and the fire spread prevention material.
[0002]
[Prior art]
Conventionally, a fire spread prevention material (underlying material) described in JP-A-56-133005 is known. The fire spread prevention material described in the above publication is a long fire spread prevention material attached in an air flow passage formed between the wall structure and the outer wall panel, and the cross-sectional shape is a hat (hat) type, It is attached to the wall structure with joints such as nails and screws with the flanges on both sides as attachment pieces, and through holes are formed in the side pieces on both sides to communicate vertically.
[0003]
Conventionally, a fire spread prevention structure described in Japanese Utility Model Laid-Open No. 7-21816 is known. The fire spread prevention structure described in the above publication is designed to prevent fire spread when fire heat is received by interposing a fire spread material that expands in volume by fire heat in an air flow passage formed between the wall structure and the outer wall panel. The supply of fresh air is cut off by the volume expansion of the material to suppress the chimney effect and prevent the propagation of the flame.
[0004]
[Problems to be solved by the invention]
However, in each of the above conventional techniques, the problem of requiring a joining material such as a nail or a screw for attaching the fire spread prevention material, the problem of requiring positioning at the time of attachment, and the gap size of the air passage are limited. There is a problem that it cannot be narrowed.
[0005]
The present invention was made in order to solve the above-mentioned problems, and the object of the present invention is to facilitate the mounting and positioning, and to prevent the spread of the fire even if the gap size of the air passage is narrow, It is to provide a fire spread prevention material.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 is a fire spread prevention structure in which a fire spread prevention material made of a long incombustible material is attached in an air flow passage formed between a wall structure and an outer wall panel.
The cross-sectional shape of the fire spread prevention material is a hollow square tube consisting of upper and lower surfaces and side surfaces. The distance between the side surfaces is narrowed downward to form a wedge shape, and the upper and lower surfaces are arranged with their longitudinal positions shifted from each other. A plurality of through holes are formed, and a side surface is provided in a pressure contact state in a gap between the wall structure and the outer wall panel.
[0007]
The invention according to claim 2 is characterized in that, in the fire spread prevention structure according to claim 1, a locking portion extends from the upper surface of the fire spread prevention material and is locked to the end face of the outer wall panel.
[0008]
Invention of Claim 3 in the fire spread prevention material which consists of a long incombustible material attached in the airflow passage formed between the wall structure and an outer wall panel,
The cross-sectional shape is a hollow square cylinder composed of upper and lower surfaces and side surfaces, and is formed in a wedge shape by narrowing the distance between the side surfaces downward, and a plurality of upper and lower surfaces are arranged with their longitudinal positions shifted from each other. A long through hole is formed in the longitudinal direction, the side surface can be inserted into the gap between the wall structure and the outer wall panel in a pressure contact state, and the locking portion locked to the end surface of the outer wall panel is made of the fire spread prevention material. It is characterized by extending from the upper surface.
[0009]
[Action]
In the fire spread prevention structure according to claim 1, the cross-sectional shape of the fire spread prevention material is formed in a wedge shape by narrowing the distance between the side surfaces downward, and the side surface is provided in a pressure contact state in the gap between the wall structure and the outer wall panel. Therefore, it is not necessary to use a bonding material such as a nail or a screw, and the mounting is easy.
In addition, since a plurality of through holes are formed on the upper and lower surfaces so as to be displaced from each other in the longitudinal direction, propagation of a flame during a fire is prevented without impairing air permeability.
[0010]
The fire spread prevention structure according to claim 2 further includes a locking portion extending from the upper surface of the fire spread prevention material and locked to the end surface of the outer wall panel. Positioning is not necessary.
[0011]
The fire spread prevention material according to claim 3 has a wedge-shaped cross section, and only provides a side surface in a pressure contact state in a gap between the wall structure and the outer wall panel, so that a joining material such as a nail and a screw is unnecessary. Installation is easy.
In addition, since a long through hole is formed in each of the upper and lower surfaces, even if the gap size of the air passage is narrow, it is possible to cope without impairing the air permeability.
Furthermore, since the latching part latched by the end surface of an outer wall panel is extended from the upper surface of a fire spread prevention material, it positions when inserting with a latching part, and positioning becomes unnecessary at the time of attachment.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIGS. 1-6 is one Example which concerns on this invention, Comprising: FIG. 1 is explanatory drawing of a fire-spreading prevention material, (A) A figure is a perspective view, (B) A figure is sectional drawing, (C) FIG. 2A and 2B are explanatory views of the auxiliary fire spread prevention material, in which FIG. 2A is a perspective view and FIG. FIG. 3 is a layout view of the fire spread prevention material and the auxiliary fire spread prevention material in the building unit. FIG. 4 is a perspective view of a framework structure of a building unit, FIG. 5 is a cross-sectional view of a fire spread prevention structure in a building unit made into a flat roof, and FIG. 6 is a cross sectional view of a fire spread prevention structure in a building unit made into an inclined roof. It is.
[0013]
1 to 6, 1 is a fire spread prevention material, 1 A is an auxiliary fire spread prevention material used as an auxiliary, and 2 is a framework structure of a building unit.
The fire spread prevention material 1 of a present Example is used for the fire spread prevention structure of a building unit.
(Building unit)
As shown in FIG. 4, the building unit of this embodiment includes four columns 21, a floor beam 22 spanned between the lower ends of the columns 21, and a roof spanned between the upper ends of the columns 21. The shaft assembly method is provided with the frame structure 2 assembled in a box shape from the beam 23.
The column 21 and the floor beam 22, and the column 21 and the roof beam 23 are all joined via a joint piece 24.
In the framework structure 2 of the building unit, as shown in FIG. 3, the outer wall panels 3 and 3 are attached to the studs laid between the floor beams 22 and the roof beams 23 through the frame material on the back of the outer wall panels 3. It is attached.
Then, the inner wall panel 4 is also attached to the back surface of the outer wall panel 3 via a heat insulating material 5 (glass wool) with a spacer, so that an air flow of about 7 mm is provided between the outer wall panel 3 and the inner wall panel 4. A path R is formed.
[0014]
(Fire spread prevention material)
The fire spread prevention material 1 of the present embodiment is a vertical air flow path R (shown in FIGS. 5 and 6) formed between the framework structure 2 (wall structure) and the outer wall panel 3 of the building unit. It is a long product formed by bending a stainless steel plate or the like (noncombustible material) having a thickness of 0.3 mm.
[0015]
As shown in FIG. 1, the fire spread prevention material 1 is a hollow square tube having an upper surface 11, a lower surface 12 and side surfaces 13 and 14, and the distance between the side surfaces 13 and 14 is narrowed downward. It has a wedge shape.
The width of the upper surface 11 is 9 mm including the locking portion 111, and the width of the lower surface 12 is 6 mm.
A plurality of long oval (5 × 11 mm) through holes 15 and 16 are formed in the upper surface 11 and the lower surface 12 so as to be displaced from each other in the longitudinal direction at a pitch of 40 mm. (See Fig. 1 (c)).
[0016]
As shown in FIGS. 5 and 6, which will be described later, the fire spread prevention material 1 has a wedge-shaped side surface in a gap of about 7 mm between the roof beam 23 and the outer wall panel 3 of the frame structure 2 of the building unit. 13 and 14 are deformed and can be inserted in a pressure contact state.
A locking portion 111 that is locked to the end surface of the outer wall panel 3 extends continuously from the upper surface 11.
The fire spread prevention material 1 is attached to the framework structure 2 of the building unit together with the outer wall panel 3 and the inner wall panel 4 and attached to the factory.
[0017]
(Auxiliary fire spread prevention material)
As shown in FIG. 3, the auxiliary fire spread prevention material 1 </ b> A is interposed in a narrow gap (about 2 mm) between the joint piece 24 of the framework structure 2 of the building unit and the outer wall panel 3. Like the prevention material 1, it is a short product formed by bending a stainless steel plate or the like (noncombustible material) having a thickness of 0.3 mm.
As shown in FIG. 2, the cross-sectional shape of the auxiliary fire spread prevention material 1A is a hollow square tube composed of an upper surface 11A, a lower surface 12A, and side surfaces 13A and 14A, and the distance between the side surfaces 13A and 14A is narrowed downward. It is formed in a wedge shape and can be inserted into a gap between the joint piece 24 and the outer wall panel 3.
The width of the upper surface 11A is about 4 mm, and the width of the lower surface 12A is about 1 mm.
The auxiliary fire spread prevention material 1 </ b> A is attached to the framework structure 2 of the building unit at the factory in the same manner as the fire spread prevention material 1.
[0018]
(Building unit fire spread prevention structure-1)
Next, a fire spread prevention structure for a building unit using the fire spread prevention material 1 will be described.
The fire spread prevention structure-1 is applied to a unit building having a flat roof and is shown in FIG.
On the roof beam 23 of the building unit, the eaves arm 7 is installed horizontally, and the eaves arm 8 having a flat roof is attached to the eaves arm 7.
An inner wall panel 4 having a heat insulating material 5 attached to the inner side thereof is erected below the roof beam 23 to form a wall structure, and a vertical air is provided between the wall structure and the outer wall panel 3. A flow path R is formed.
In addition, the outer wall panel 3 is comprised from the outer wall surface material 31 and the frame 32 which supports this.
[0019]
The fire spread prevention structure-1 is a structure in which a long fire spread prevention material 1 is attached along a direction orthogonal to the air flow passage R, and is between the roof beam 23 and the frame body 32 of the outer wall panel 3. The side surfaces 13 and 14 of the fire spread prevention material 1 are inserted into the gap (7 mm) in a pressure contact state.
A locking portion 111 extending from the upper surface 11 of the fire spread prevention material 1 is locked to the end surface of the outer wall panel 3.
Further, a waterproof moisture-permeable air-permeable tape 6 is attached so as to cover the upper surface 11 of the fire spread prevention material 1. This waterproof and moisture-permeable air-permeable tape 6 does not allow rainwater to pass through, but allows air to pass through, and is preferably a synthetic resin non-woven fabric and the like, preventing rainwater from entering the airflow path R, In addition, ventilation inside the outer wall is ensured.
[0020]
(Building unit fire spread prevention structure-2)
The fire spread prevention structure-2 is applied to a unit building having an inclined roof, and is shown in FIG.
An eaves beam 9 is installed on the roof beam 23 of the building unit, and a rafter mounting bracket 91 and an eaves water return 92 are attached to the eaves beam 9, and an inclined roof (not shown) is installed above the eaves beam. .
An inner wall panel 4 having a heat insulating material 5 attached to the inner side thereof is erected below the roof beam 23 to form a wall structure, and a vertical air is provided between the wall structure and the outer wall panel 3. A flow path R is formed.
[0021]
The fire spread prevention structure-2 is a structure in which a long fire spread prevention material 1 is attached along a direction orthogonal to the air flow passage R, and is between the roof beam 23 and the frame 32 of the outer wall panel 3. Side surfaces 13 and 14 of the fire spread prevention material 1 are inserted into the gap in a pressure contact state.
A locking portion 111 extending from the upper surface 11 of the fire spread prevention material 1 is locked to the end surface of the outer wall panel 3.
Further, a waterproof and moisture-permeable air-permeable tape 6 is affixed so as to cover the upper surface 11 of the fire spread prevention material 1 to prevent intrusion of rainwater into the air flow passage R and to ensure the ventilation inside the outer wall. Yes.
[0022]
(Operation of Example)
In the fire spread prevention structure-1 and the fire spread prevention structure-2 shown in the present embodiment, the cross-sectional shape of the fire spread prevention material 1 is made wedge-shaped by narrowing the distance between the side surfaces 13, 14 downward, and the roof beam 23 (wall) Since the side surfaces 13 and 14 of the fire spread prevention material 1 are simply provided in the gap between the structural body) and the outer wall panel 3, no joining material such as nails and screws is required, and attachment is easy.
In addition, since the plurality of through holes 15 and 16 are formed in the upper surface 11 and the lower surface 12 of the fire spread prevention material 1 so as to be displaced from each other in the longitudinal direction, in the event of a fire without impairing the air permeability. Prevent the propagation of fire.
[0023]
Furthermore, since the latching | locking part 111 is extended from the upper surface 11 of the fire spread prevention material 1, and is latched by the end surface of the outer wall panel 3, it positions when inserting with the latching | locking part 111, and positioning becomes unnecessary at the time of attachment.
[0024]
【The invention's effect】
According to the fire spread prevention structure according to claim 1, since the side surface of the fire spread prevention material is simply provided in a press-contact state in the gap between the wall structure and the outer wall panel, a joining material such as a nail and a screw is not required and installation is easy. It becomes.
In addition, since a plurality of through holes are formed on the upper and lower surfaces so as to be displaced from each other in the longitudinal direction, propagation of a flame during a fire is prevented without impairing air permeability.
[0025]
The fire spread prevention structure according to claim 2 further includes a locking portion extending from the upper surface of the fire spread prevention material and locked to the end surface of the outer wall panel. Positioning is not necessary.
[0026]
According to the third aspect of the present invention, since the fire spread prevention material is only inserted in a pressure contact state, a joining material such as a nail or a screw is not required, and attachment is easy.
In addition, since a long through hole is formed in each of the upper and lower surfaces, even if the gap size of the air passage is narrow, it is possible to cope without impairing the air permeability.
Furthermore, it is positioned when it is inserted by the locking portion, and positioning is not required at the time of mounting.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a fire spread prevention material according to an embodiment of the present invention, wherein (a) is a perspective view, (b) is a sectional view, and (c) is an end development view. is there.
FIGS. 2A and 2B are explanatory views of an auxiliary fire spread prevention material, in which FIG. 2A is a perspective view and FIG. 2B is a cross-sectional view.
FIG. 3 is a layout view of a fire spread prevention material and an auxiliary fire spread prevention material in a building unit.
FIG. 4 is a perspective view of a framework structure of a building unit.
FIG. 5 is a cross-sectional view of a fire spread prevention structure in a building unit having a flat roof.
FIG. 6 is a cross-sectional view of a fire spread prevention structure in a building unit having an inclined roof.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fire spread prevention material 11 Upper surface 111 Locking part 12 Lower surface 13, 14 Side surface 15, 16 Through-hole 2 Frame structure of building unit 3 Outer wall panel 4 Inner wall panel R Air flow passage

Claims (3)

In the fire spread prevention structure in which a fire spread prevention material made of a long incombustible material is attached in an air flow passage formed between the wall structure and the outer wall panel,
The cross-sectional shape of the fire spread prevention material is a hollow square tube consisting of upper and lower surfaces and side surfaces. The distance between the side surfaces is narrowed downward to form a wedge shape, and the upper and lower surfaces are arranged with their longitudinal positions shifted from each other. A fire spread prevention structure, wherein a plurality of through holes are formed, and a side surface is provided in a pressure contact state in a gap between the wall structure and the outer wall panel. The fire spread prevention structure according to claim 1, wherein a locking portion extends from an upper surface of the fire spread prevention material and is locked to an end face of the outer wall panel. In the fire spread prevention material made of a long incombustible material attached in the air flow passage formed between the wall structure and the outer wall panel,
The cross-sectional shape is a hollow square tube made up of upper and lower surfaces and side surfaces, and the distance between the side surfaces is narrowed downwards to form a wedge shape, and the upper and lower surfaces are arranged with their longitudinal positions shifted from each other. A long through hole is formed, the side surface can be inserted into the gap between the wall structure and the outer wall panel in a pressure contact state, and the locking portion locked to the end surface of the outer wall panel is the upper surface of the fire spread prevention material A fire spread prevention material characterized by being extended from.

Images