JP2002256648A - Fire preventive and fire resisting structure of eave soffit part, and corner member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire preventive and fire resisting structure of an eave soffit part, which can prevent hot air from intruding into an under surface of eaves even if an eave-soffit runner (a corner member) undergoes deformation, etc., due to heat at a fire. SOLUTION: A thermally expansive fire-resisting material 7 under an unexpanded state is provided in a close-contact state between the eave-soffit runner 2, into which an eave-soffit plate 3 is inserted, and an external wall 1 of a building. The material 7 is a non-combustible material expanded (foamed) by several tens of times at approximate 200 deg.C. In normal times, the presence of the material 7 under the unexpanded state brings about waterproofing at a connection place between the runner 2 and the external wall 1. In case of the fire, the presence of the thermally expanded material 7 prevents a gap from being made between the runner 2 and the external wall 1 even if the runner 2 undergoes the deformation, etc., due to the heat at the fire because the heat at the fire makes the material 7 expanded between a back part of the runner 2 and the external wall 1. Consequently, the hot air is prevented from intruding into the under surface of the eaves.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof structure for eaves and a parting member for improving the fireproof performance of the eaves of a building.

[0002]

2. Description of the Related Art FIG. 7A is a cross-sectional view showing the structure of a conventional eaves ceiling. A back surface of an eaves sky runner (partition member) 51 made of steel, aluminum, or the like having a substantially U-shaped cross section is fastened to an outer wall 52 of the building with screws or the like. The side edge of the eaves top plate 53 is inserted into the accommodation portion 51a of the eaves top runner 51. An opening 51b for ventilation is formed in the eaves top support runner 51, and the outside air is guided to the back of the eaves by using the storage portion 51a as a ventilation path. Further, a heat-expandable refractory material 54 is provided on the inner side surface of the back portion of the eaves top support runner 51, and the heat-expandable refractory material 54 expands due to heat at the time of a fire so that the ventilation path is blocked. It has become.

[0003]

However, the above-mentioned conventional eaves structure may cause the following inconvenience when a fire occurs. That is, as shown in FIG. 7 (b), there is a possibility that the eaves sky runner 51 is thermally deformed or melted by the heat of the fire. In this case, a gap is formed between the eaves sky runner 51 and the outer wall. Will happen. When such a gap is generated, hot air enters the inside of the eaves back through the gap, so that even if the ventilation path of the eaves top support runner 51 can be blocked, the temperature inside the eaves back rises. There is a possibility that it will.

[0004] In view of the above circumstances, the present invention can prevent the infiltration of hot air into the interior of the eaves even if the parting member (eaves runner) is deformed by heat at the time of fire. It is an object to provide a structure and a parting member.

[0005]

According to the present invention, there is provided a fireproof structure for an eaves top portion, wherein the back portion of the parting member has a housing portion into which a side edge portion of the eaves top plate is inserted and a back portion facing a building outer wall. A heat-expandable refractory material in an unexpanded state is interposed between the building and an outer wall of the building in an intimate contact state.

With the above configuration, the heat-expandable refractory material expands (foams) between the back surface of the parting member and the outer wall of the building due to heat at the time of fire, so that the parting member is deformed by heat at the time of fire. Even so, no gap is formed between the parting member and the building outer wall due to the presence of the thermally expanded refractory material, and it is possible to prevent hot air from entering the interior of the eaves back. In addition, at normal times, the unexpanded thermally expandable refractory material is interposed between the back part of the parting member and the building outer wall, so that the waterproof property at the joint between the parting member and the building outer wall is improved. Can be improved.

[0007] The parting member preferably has a ventilation opening which forms a ventilation path for guiding outside air to the back of the eaves. With such a configuration, the outside air is guided to the back of the eaves by the ventilation openings formed in the parting member, so that the back of the eaves can be ventilated. In the event of a fire, it is desirable that the ventilation path be shielded. As a structure for shielding the ventilation path, for example, a heat-expandable refractory material or a damper activated by heat in a fire is installed in the ventilation path. It is possible to put.

It is preferable that an opening for introducing a refractory material is formed in a rear portion of the parting member so as to guide a thermally expandable refractory material that expands due to heat into an inner space of the rear portion. With such a configuration, in the event of a fire, a heat-expandable refractory material provided between the rear portion of the parting member and the outer wall of the building prevents the generation of a gap therebetween, and at the same time, the refractory material formed on the rear portion. When the refractory material expanded through the introduction opening is guided into the inner space of the rear portion, and the inner space of the rear portion forms an air passage, the air passage is blocked or the air passage is narrowed. can do. Further, even when the inner space of the rear portion does not form a ventilation path, it is possible to shield against the generation of an undesired ventilation path based on the generation of a gap due to the deformation of the parting member.

The fore edge of the side edge of the eaves top plate and the inner surface of the back surface of the parting member are configured to face each other, and the fore edge of the eaves top plate inserted into the accommodating portion is not expanded. A thermally expandable refractory material in a state may be provided. Even if the parting member does not form a ventilation path, a gap may be generated between the parting member and the eaves top plate when the parting member is thermally deformed or the like. Shielding can be performed with the heat-expandable refractory material provided on the fore-edge surface. Further, in the configuration in which the parting member forms a ventilation path, the ventilation path can be shielded by the heat-expandable refractory material provided on the small face, and the refractory material expanded through the refractory material introduction opening is formed. Also in the configuration introduced into the inner space of the back part, the reliability of the shielding of the inner space can be enhanced by the heat-expandable refractory material provided on the small face. The heat-expandable refractory material is provided on the small edge of the side edge of the eaves top, and there is no change in the shape of the eaves top in the thickness direction. There is no problem, and it is not necessary to design a special shape as a parting member.

[0010] The parting member of the present invention includes a housing portion into which the side edge of the eaves top plate is inserted, a back surface facing the building outer wall, and a refractory material introduction opening formed in the back surface. It is characterized by having. In addition, the parting member of the present invention has a back portion facing the building outer wall, a ventilation opening for forming a ventilation path for guiding outside air to the back of the eaves, a refractory material introduction opening formed in the back portion, It is characterized by having. In these parting members, a non-expanded heat-expandable refractory material may be provided in advance on the outer surface of the back surface.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An eaves-top fireproof structure and an eaves-top runner (parting member) according to an embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a sectional view showing an eaves-top fireproof structure according to this embodiment. An eaves runner 2 made of steel or aluminum is fastened to a building outer wall 1 made of a noncombustible material with screws. The eaves top runner 2 has a substantially U-shaped cross section, and has a housing portion 2a into which the side edge of the eaves top plate 3 is inserted and a back surface facing the building outer wall 1. The eaves top plate 3 is made of, for example, a calcium silicate plate or the like, and one side edge portion is inserted into the accommodating portion 2a of the eaves runner 2 and a screw is attached to a lower surface of a field edge 8 located near the eaves runner 2. , And the other side edge is fixed to the lower surface of the gable base bar 4 by screws. In addition, a blindfold 5 is attached to the gable base 4 and a gutter 6 is fixed to the blindfold 5.

[0013] Between the eaves runner 2 and the building outer wall 1,
An unexpanded thermally expandable refractory material 7 is provided in close contact. That is, the space between the eaves sky runner 2 and the building outer wall 1 is not used as a ventilation path for back ventilation of the eaves sky.
The heat-expandable refractory material 7 is desirably a non-combustible material that expands (foams) several tens of times at about 200 ° C., for example. A contained material, a graphite-based material, or the like can be used, but is not limited thereto. Further, the heat-expandable refractory material 7 can be obtained by applying an irregular-shaped material (liquid or the like). In this embodiment, a tape-shaped material having an adhesive surface on one side is used. Good mounting workability.

FIG. 2A is an enlarged sectional view of a main part of FIG. 1, and shows a normal state (non-fire state). In this normal state, the unexpanded thermally expandable refractory material 7 is interposed between the back surface of the eaves sky runner 2 and the building outer wall 1 so as to be in close contact with each other. Waterproofing at the point of contact with On the other hand, in the event of a fire, as shown in FIG. 2 (b), the heat-expandable refractory 7 expands between the back of the eaves runner 2 and the building outer wall 1 due to the heat of the fire. Even if the runner 2 is deformed by heat at the time of fire, the above-mentioned refractory material 7 thermally expanded.
Due to the presence of, there is no gap between the eaves sky runner 2 and the building outer wall 1, and it is possible to prevent hot air from entering the interior of the back of the eaves.

FIG. 3 is a cross-sectional view showing a modification of the fireproof structure of the eaves-top section. FIG. 3A shows a normal state, and FIG.
Indicates a fire situation. The eaves top runner 21 has a substantially U-shaped cross section, and has a housing 21a into which the side edge of the eaves top plate 3 is inserted, a back side facing the building outer wall 1, and a ventilation path for guiding outside air to the back of the eaves. And a plurality of ventilation openings 21b. The ventilation openings 21b are respectively formed in the lower surface portion and the upper surface portion of the eaves runner 21, and the accommodation portion 21a
The outside air is led to the back of the eaves as a ventilation path. An unexpanded thermally expandable refractory material 7 is provided between the eaves sky runner 21 and the building outer wall 1 in close contact with each other. The fore-edge surface 3a of the side edge portion of the eave-top plate 3 faces the inner surface of the back surface of the eave-top support plate 21 at a distance from the eave-top plate 3, and the fore-edge surface 3a has an unexpanded thermal expansion state. A refractory material 7A is provided.

With this configuration, the outside air is guided to the back of the eaves by the ventilation openings 21b formed in the eaves runner 21, so that the back of the eaves is ventilated. In the event of a fire, it is desirable that the ventilation path be shielded. For this purpose, for example, it is conceivable to install a damper or the like that is activated by heat in the event of a fire, but in the example shown in FIG. The heat-expandable refractory material 7A provided on the fore-edge surface 3a at the side edge of the plate 3 realizes the shielding of the ventilation path in the event of a fire. Further, since the heat-expandable refractory material 7A is provided on the fore-edge surface 3a, there is no change in the shape of the eaves top plate 3 in the thickness direction side, and there is no hindrance in inserting the eaves top plate 3 into the accommodating portion 21a. There is no need to design a special shape as the eaves runner 21. In addition, since this configuration does not provide a thermal expansion refractory material on the inner wall surface of the eaves runner 21 itself, it has a higher thermal conductivity than a configuration in which the thermal expansion material is provided on the inner wall surface of the eaves runner 21 itself. There is an advantage that mounting of the intumescent refractory material is easy.

FIGS. 4A and 4B are cross-sectional views showing another modification of the eaves-top fireproof structure. FIG. 4A shows a normal state, and FIG. 4B shows a fire state. . FIG. 5 is FIG.
It is the perspective view which showed the eaves sky runner 22 used for the eaves sky fireproof structure. The eaves top runner 22 has a substantially U-shaped cross section, and has a housing section 22a into which the side edge of the eaves top plate 3 is inserted, a back side facing the building outer wall 1, and a ventilation path for guiding outside air to the back of the eaves. It has a plurality of ventilation openings 22b and a plurality of refractory material introduction openings 22c. The ventilation openings 22b are formed on the lower surface and the upper surface of the eaves runner 22, respectively, and the refractory material introduction openings 22c are formed on the back surface. Further, an insertion hole 22d through which a screw for fastening the eaves sky runner 22 to the building outer wall 1 is inserted is formed in the rear part. An unexpanded heat-expandable refractory material 7 is provided on the outer surface of the back of the eaves sky runner 22,
The heat-expandable refractory material 7 is exposed in the accommodation portion 22a at the location of the refractory material introduction opening 22c.

With this configuration, in addition to conducting outside air to the back of the eaves through the ventilation opening 22a of the eaves runner 22, ventilation at the back of the eaves can be performed.
The heat-expandable refractory material 7 provided between the rear part of the building and the building outer wall 1 prevents the formation of a gap therebetween, and at the same time, the refractory material 7 expanded through the refractory material introduction opening 22c allows the ventilation path to pass through. And the air passage can be blocked or the air passage can be narrowed. That is, it is possible to prevent generation of a gap due to thermal deformation or the like of the eaves runner 22,
Can be realized by the heat-expandable refractory material 7 provided at one place. In this configuration, if the thermal expansion material 7A is also provided on the fore-edge surface 3a of the eaves top plate 3, the reliability of shielding the ventilation path can be increased. Since such a configuration does not provide a thermal expansion refractory on the inner wall surface of the eaves runner 22 itself,
There is an advantage that the heat-expandable refractory material can be easily mounted, compared to a configuration in which the heat-expandable refractory material is provided on the inner wall surface of the eave sky runner 22 itself.

FIG. 6 is a sectional view showing another modification of the fireproof structure of the eaves ceiling. The eave sky runner 23 is locked to the ridge 8 and fixed to the building outer wall 1 with screws or the like. The eaves top runner 23 includes a housing part 23a into which the side edge of the eaves top plate 3 is inserted, a back part facing the building outer wall 1, and
And a ventilation opening 23b forming a ventilation path for guiding outside air to the back of the eaves.
The space between the forefront 3a and the back surface is somewhat narrowed by separating the portion facing the building from the building outer wall 1. An unexpanded thermally expandable refractory material 7 is provided on the rear surface of the rear portion of the eave sky runner 23. In addition, the small face 3 of the eaves top plate 3
a is provided with an unexpanded thermally expandable refractory material 7.

[0020]

As described above, according to the present invention, even if the parting member (eave sky runner) is deformed by heat at the time of fire, it is possible to prevent the invasion of hot air into the interior of the eave. It works.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an eave-top fireproof structure according to an embodiment of the present invention.

FIGS. 2A and 2B are cross-sectional views showing a main part of FIG. 1, wherein FIG. 2A is a view at a normal time, and FIG. 2B is a view showing a state at the time of a fire.

FIGS. 3A and 3B are cross-sectional views showing a modification of the eaves-top fire-resistant structure according to the embodiment of the present invention, wherein FIG. 3A is a normal view and FIG. It is a figure showing a situation.

FIG. 4 is a cross-sectional view showing another modification of the eaves-top fireproof structure according to the embodiment of the present invention, wherein FIG. 4 (a) is a view at a normal time, and FIG. It is a figure showing a situation at the time.

5 is a perspective view of an eaves runner used in the eaves fire protection structure of FIG. 4;

FIG. 6 is a sectional view showing another modified example of the eaves-top fireproof structure according to the embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a conventional eave-top structure.

[Explanation of symbols]

 Reference Signs List 1 outer wall of building 2 eaves top runner (partition member) 2a accommodation part 21 eaves top runner (partition member) 21a accommodation part 21b ventilation opening 22 eaves top runner (partitioning member) 22a accommodation part 22b ventilation opening 22c refractory material introduction opening 23 eaves top runner (partitioning member) 23a accommodating part 23b ventilation opening 3 eaves top plate 3a small face 7 thermal expansive refractory 7A thermal expansive refractory

Claims (7)

[Claims] 1. An unexpanded thermally expandable fire-resistant material between a back part of a parting member having a receiving part into which a side edge part of an eaves top plate is inserted and a back part facing the building outer wall and the building outer wall. The eaves-top fireproof structure, which is made of wood in close contact. 2. The eaves ceiling fireproof structure according to claim 1, wherein the parting member has a ventilation opening forming a ventilation path for guiding outside air to the back of the eaves. Fireproof structure. 3. The eaves-top refractory structure according to claim 1, wherein a heat-expandable refractory material that expands due to heat is introduced into the back space of the parting member into the inner space of the back surface. An eaves-top fireproof structure, which has an opening for introducing a fireproof material. 4. The eaves ceiling fireproof structure according to claim 1, wherein the small edge surface of the side edge portion of the eaves top plate and the inner surface of the rear portion of the parting member face each other. And an unexpanded heat-expandable refractory material is provided on the fore-edge surface of the eaves-top plate inserted into the housing portion. 5. A housing into which a side edge of the eaves top plate is inserted,
A parting member comprising: a back surface facing an outer wall of a building; and a refractory material introduction opening formed in the back surface. 6. A housing into which a side edge of the eaves top plate is inserted,
A partition having a back surface facing the building outer wall, a ventilation opening forming a ventilation path for guiding outside air to the back of the eaves, and a refractory material introduction opening formed in the back surface. Element. 7. The parting member according to claim 5, wherein an unexpanded heat-expandable refractory material is provided on an outer surface of the back surface portion.