JP2000054525A - Parting members for fire-resistant ventilation - Google Patents

Abstract

(57) [Problem] To provide a fire-resistant ventilation parting member for use in a house having both ventilation and fire resistance. SOLUTION: This is a fire-resistant ventilation parting member 10 in which a ventilation member 2 having a U-shaped cross section is superimposed on a support member 1 having a U-shaped cross section for supporting an eave ceiling in a stepped manner. A number of ventilation holes 22 are provided on the bottom 21 of the second member 2, and a laminated body 4 of a thermally expandable sheet 41 and a face material 42 made of a noncombustible material is attached to the ventilation member 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parting member for ventilation, which makes it possible to ventilate the inside of a building, the back of a shed, etc., and beautifully finish ceiling materials and wall materials. In addition, the present invention relates to a fire-resistant ventilation parting member for automatically closing a ventilation hole and preventing a flame from entering a building.

[0002]

2. Description of the Related Art In recent years, the quality requirements for apartments and detached houses have increased, and high durability, fire resistance, high heat insulation, airtightness, and the like have been demanded. In order to obtain high durability, ventilation in the walls and behind the shed is performed. In particular, 100-200mm
Insufficient ventilation in thick walls, behind huts, under floors, etc., causes problems such as corrosion due to condensation and mold growth. For this reason, measures have been taken such as providing a ventilation opening, a gully, etc. on the cloth foundation and the eaves ceiling to take in air, and providing a belt-shaped ventilation opening along the outer wall between the eaves ceiling. In addition, some are certified as highly durable houses (Housing Finance Corporation) by increasing the durability of the houses by ventilating the inside of the walls.

For example, Japanese Utility Model Laid-Open No. 2-68923 discloses a method of using a ceiling parting edge having a mesh-shaped opening in order to ventilate the inside of the wall or the back of a hut. However, the above-mentioned ceiling parting edge has a problem that sufficient fire resistance cannot be obtained because a flame enters the back of a cabin or a wall at the time of a fire from an opening provided for ventilation.

[0004] Fireproof eaves ventilation vents having the above-mentioned ventilation and fire resistance are disclosed in, for example, JP-A-9-105200, JP-A-6-73828, and JP-A-9-2031.
No. 33 is disclosed. Furthermore, as a ventilation structure in a fire wall, for example, JP-A-9-203132, and as an attic ventilation structure, for example, JP-A-10-80499
And Japanese Patent Application Laid-Open No. 10-80500.

[0005] In particular, ventilation openings provided in eaves ceilings cannot be provided with openings in the fire protection or semi-fire prevention area from the viewpoint of fire resistance, so it is difficult to achieve both high durability and fire resistance. there were.

[0006]

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a fire-resistant ventilation parting member for use in a house having both ventilation and fire resistance.

[0007]

According to the fire-resistant ventilation parting member of the present invention, a ventilation member having a U-shaped cross section is superimposed on a supporting member having a U-shaped cross section to support an eaves ceiling. A ventilation parting member, in which a number of ventilation holes are provided at a bottom side of the ventilation member, and a face material made of a fire-resistant expansion sheet and a non-combustible material is sequentially laminated on an inner surface of an upper side or an inner surface of a side of the ventilation member. It is characterized by being done.

Hereinafter, the present invention will be described in detail. The fire-resistant expansion sheet is preferably made of a fire-resistant resin composition containing butyl rubber, a phosphorus compound, neutralized heat-expandable graphite, and an inorganic filler.

The above-mentioned butyl rubber may be used in combination with another thermoplastic resin or rubber substance as long as the tackiness is not impaired. The thermoplastic resin and the rubber substance are not particularly limited, and examples thereof include a polyolefin resin such as a polypropylene resin and a polyethylene resin, a poly (1-) butene resin, a polypentene resin, a polystyrene resin, and acrylonitrile-butadiene. -Styrene resin, polycarbonate resin, polyphenylene ether resin, acrylic resin, polyamide resin, polyvinyl chloride resin, phenol resin, polyurethane resin, polybutene, polychloroprene, polybutadiene, polyisobutylene, nitrile rubber, etc. No. The thermoplastic resin and the rubber substance may be used alone or in combination of two or more.

Among these, halogenated resins such as chloroprene-based resins and chlorinated butyl-based resins have high flame retardancy in themselves, and further, cross-linking occurs by a dehalogenation reaction due to heat, resulting in a combustion residue after heating. Is preferred in that the strength of the resin is improved. The above-mentioned thermoplastic resin and rubber materials are very flexible and have rubber-like properties, so that the inorganic filler can be highly filled, and the obtained sheet-like material is flexible and flexible. It becomes something. In order to obtain a more flexible and flexible sheet material, a non-vulcanized rubber or a polyethylene resin is preferably used.

[0011] The thermoplastic resin and the rubber material further include:
Within a range that does not impair the fire resistance performance of the fire-resistant resin composition,
Crosslinking or modification may be performed. When performing the crosslinking or modification of the thermoplastic resin or the rubber material, the crosslinked or modified thermoplastic resin or the rubber material may be blended with other components such as a phosphorus compound or an inorganic filler described below. Cross-linking or modification may be performed simultaneously with or after the components are blended.

[0012] The crosslinking method is not particularly limited, and is a crosslinking method commonly used for thermoplastic resins and rubber substances, for example, a crosslinking method using various crosslinking agents, peroxides, and the like, a crosslinking method using electron beam irradiation, and the like. Is mentioned.

The above phosphorus compound is not particularly limited.
For example, red phosphorus; various phosphates such as triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, and xylendiphenyl phosphate; phosphorus such as sodium phosphate, potassium phosphate, and magnesium phosphate Acid metal salts; ammonium polyphosphates; and compounds represented by the following general formula (1). Among these, from the viewpoint of fire resistance, red phosphorus, ammonium polyphosphates, and compounds represented by the following general formula (1) are preferable, and ammonium polyphosphates are more preferable in terms of performance, safety, cost, and the like. preferable.

[0014]

Embedded image

In the formula, R ¹ and R ³ are a hydrogen atom, a linear or branched alkyl group having 1 to 16 carbon atoms, or
Represents an aryl group having 6 to 16 carbon atoms. R ² is a hydroxyl group,
A linear or branched alkyl group having 1 to 16 carbon atoms,
A linear or branched alkoxyl group having 1 to 16 carbon atoms, an aryl group having 6 to 16 carbon atoms, or 6-1
6 represents an aryloxy group.

The flame retardant effect is improved by adding a small amount of the above-mentioned red phosphorus. As the red phosphorus, commercially available red phosphorus can be used, but from the viewpoint of moisture resistance, safety such as not spontaneously igniting during kneading, those obtained by coating the surface of red phosphorus particles with a resin are preferably used. .

The above-mentioned ammonium polyphosphates are not particularly limited, and include, for example, ammonium polyphosphate and melamine-modified ammonium polyphosphate. Of these, ammonium polyphosphate is preferably used from the viewpoint of handleability and the like. As a commercially available product, for example, "AP4" manufactured by Hoechst
22, "AP462";"SumisafeP" manufactured by Sumitomo Chemical Co., Ltd .; "Terage C60", "Terage C70", "Terage C80" manufactured by Chisso.

The compound represented by the above general formula (1) is not particularly restricted but includes, for example, methylphosphonic acid, dimethyl methylphosphonate, diethyl methylphosphonate, ethylphosphonic acid, propylphosphonic acid, butylphosphonic acid, 2-methylpropyl Phosphonic acid, t-butylphosphonic acid, 2,3-dimethyl-butylphosphonic acid, octylphosphonic acid, phenylphosphonic acid, dioctylphenylphosphonate, dimethylphosphinic acid, methylethylphosphinic acid, methylpropylphosphinic acid, diethylphosphinic acid, dioctyl Examples include phosphinic acid, phenylphosphinic acid, diethylphenylphosphinic acid, diphenylphosphinic acid, and bis (4-methoxyphenyl) phosphinic acid. Among them, t-butyl phosphonic acid is expensive, but is preferable in terms of high flame retardancy. The above phosphorus compounds may be used alone or in combination of two or more.

The neutralized heat-expandable graphite is obtained by neutralizing heat-expandable graphite which is a conventionally known substance. The heat-expandable graphite is a natural scale-like graphite, pyrolytic graphite, powder such as quiche graphite,
Produced by treating with inorganic acids such as concentrated sulfuric acid, nitric acid, and selenic acid and strong oxidizing agents such as concentrated nitric acid, perchloric acid, perchlorate, permanganate, dichromate, and hydrogen peroxide. It is a graphite intercalation compound that is a crystalline compound while maintaining a layered structure of carbon.

The heat-expandable graphite obtained by the acid treatment as described above is further neutralized with ammonia, an aliphatic lower amine, an alkali metal compound, an alkaline earth metal compound, etc. Heat-expandable graphite.

The aliphatic lower amine is not particularly restricted but includes, for example, monomethylamine, dimethylamine,
Trimethylamine, ethylamine, propylamine, butylamine and the like. The alkali metal compound and the alkaline earth metal compound are not particularly limited,
For example, hydroxides, oxides, carbonates, sulfates, organic acid salts of potassium, sodium, calcium, barium, magnesium and the like can be mentioned.

The particle size of the neutralized heat-expandable graphite is preferably 20 to 200 mesh. When the particle size is smaller than 200 mesh, the degree of expansion of graphite is small, a predetermined refractory insulation layer cannot be obtained, and when the particle size is larger than 20 mesh, there is an advantage that the degree of expansion of graphite is increased, but thermoplastic resin and When kneading with a rubber substance, dispersibility deteriorates, and deterioration of physical properties cannot be avoided.

Commercial products of the neutralized heat-expandable graphite include, for example, “CA-60S” manufactured by Nippon Kasei Co., Ltd.
"GREP-EG" manufactured by Tosoh Corporation, UCAR Carbo
"GRAFGUARD # 160", "GRAFFG"
UARD # 220 ”and the like.

The inorganic filler is not particularly limited.
For example, metal oxides such as alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, and ferrites; calcium hydroxide, magnesium hydroxide, aluminum hydroxide, hydrotalcite, and the like. Hydrous inorganic substances; basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, strontium carbonate, barium carbonate and other metal carbonates; calcium salts such as calcium sulfate, gypsum fiber and calcium silicate; silica, diatomaceous earth, dawsonite, barium sulfate ,
Talc, clay, mica, montmorillonite, bentonite, activated clay, sepiolite, imogolite, sericite, glass fiber, glass beads, silica-based balun, aluminum nitride, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, carbon balun , Charcoal powder, various metal powders, potassium titanate, magnesium sulfate "MOS" (trade name), lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powders, slag Fiber, fly ash, dewatered sludge, and the like. Among these, hydrous inorganic substances and metal carbonates are preferred.

The above-mentioned hydrated inorganic substances such as magnesium hydroxide and aluminum hydroxide endothermic due to water generated by the dehydration reaction at the time of heating, so that the temperature rise is reduced and high heat resistance is obtained, Oxide remains as a residue, which works as an aggregate, which is particularly preferable because the strength of the combustion residue is improved. Magnesium hydroxide and aluminum hydroxide have different temperature ranges in which the dehydrating effect is exhibited, so the combined use expands the temperature range in which the dehydrating effect is exhibited, and a more effective temperature rise suppression effect is obtained. Is preferred.

The above metal carbonates such as calcium carbonate and zinc carbonate are considered to promote swelling by reaction with the above phosphorus compound. In particular, when ammonium polyphosphate is used as the phosphorus compound, a high swelling effect is obtained. Can be In addition, the metal carbonate functions as an effective aggregate, and forms a combustion residue having high shape retention after burning.

Among the above metal carbonates, alkali metal carbonates such as sodium carbonate; magnesium carbonate;
Preferred are alkaline earth metal carbonates such as calcium carbonate and strontium carbonate; and carbonates of Group IIb metals of the periodic table such as zinc carbonate.

Generally, the above-mentioned inorganic filler acts as an aggregate, and is considered to contribute to improvement in residue strength and increase in heat capacity. The inorganic fillers may be used alone or in combination of two or more.

The particle size of the inorganic filler is 0.5 to
200 μm can be used, and more preferably 1 to 5
0 μm. Further, it is more preferable to use a combination of an inorganic filler having a large particle size and a small filler having a small particle size. By using the combination, it is possible to achieve high packing while maintaining the mechanical performance of the sheet. .

A polyhydric alcohol may be added to the refractory resin composition. The polyhydric alcohol is a hydrocarbon compound having two or more hydroxyl groups in the molecule, and preferably has 1 to 50 carbon atoms. Examples of polyhydric alcohols include ethylene glycol, diethylene glycol, propylene glycol, butylene glycol,
4-butanediol, 1,6-hexanediol, monopentaerythritol, dipentaerythritol, tripentaerythritol, neopentaerythritol, sorbitol, inositol, mannitol, glucose, fructose, starch, cellulose and the like. The polyhydric alcohol may be used alone,
Two or more kinds may be used in combination.

As the polyhydric alcohol, the ratio of the number of hydroxyl groups to the number of carbon atoms in the molecule [(number of hydroxyl groups) / (number of carbon atoms)]
Is preferably 0.2 to 2, and more preferably [(the number of hydroxyl groups) / (the number of carbon atoms)] as represented by pentaerythritols, sorbitol, mannitol and the like is 0.7 to 1 .5. Above all, pentaerythritols are most preferred because of their high hydroxyl group content and high carbonization promoting effect.

Polyhydric alcohols having a ratio of the number of hydroxyl groups to the number of carbon atoms [(number of hydroxyl groups) / (number of carbon atoms)] in the range of 0.2 to 2 can be effectively dehydrated and condensed during combustion. Form a carbonized layer. The above ratio [(number of hydroxyl groups) / (number of carbon atoms)]
However, if it is less than 0.2, the decomposition of carbon chains is more likely to occur at the time of combustion than dehydration condensation, so that it is not possible to form a sufficient carbonized layer. , Water resistance is greatly reduced. When the water resistance is reduced, when the resin composition immediately after preparation is water-cooled, the polyhydric alcohol is eluted or there is a problem that the polyhydric alcohol bleeds out due to humidity during storage of the molded article. .

In the present invention, preferred examples of the fire-resistant resin composition used for the fire-resistant expanded sheet include the fire-resistant resin compositions (1) to (5) described below.

The refractory resin composition (1) comprises a resin component containing the butyl rubber as a main component (including the thermoplastic resin and rubber substance, hereinafter simply referred to as a resin component), a phosphorus compound,
The compounding amount of the neutralized heat-expandable graphite and the inorganic filler, and the amount of the phosphorus compound and the neutralized heat-expandable graphite is based on 100 parts by weight of the resin component containing butyl rubber as a main component. The amount is preferably 20 to 200 parts by weight, and the weight ratio of the neutralized heat-expandable graphite to the phosphorus compound [(neutralized heat-expandable graphite) / (phosphorus compound)]
Is preferably 0.01 to 9.

The refractory resin composition (2) comprises the resin component, a phosphorus compound, and at least one selected from the group consisting of alkali metals, alkaline earth metals, and metal carbonates of Group IIb metals of the periodic table. The total amount of the phosphorus compound and the metal carbonate is preferably 50 to 900 parts by weight based on 100 parts by weight of the resin component, and the weight ratio of the metal carbonate to the phosphorus compound [(metal carbonate) / (phosphorus compound)] Is 0.6 to 1.5
Is preferred.

The refractory resin composition (3) comprises the above resin component, a phosphorus compound, a hydrated inorganic substance and / or a calcium salt,
And alkali metals, alkaline earth metals and the periodic table
It consists of at least one metal selected from the group IIb metal carbonates, and the total amount of the phosphorus compound, metal carbonate, hydrated inorganic substance and / or calcium salt is 50 to 900 parts by weight based on 100 parts by weight of the resin component. Preferably, the weight ratio of the total amount of the metal carbonate and the hydrated inorganic substance and / or the calcium salt to the phosphorus compound [(the total amount of the metal carbonate and the hydrated inorganic substance and / or the calcium salt) / (the phosphorus compound)]
Is preferably 0.6 to 1.5. The total amount of the hydrous inorganic substance and / or calcium salt is preferably 1 to 70 parts by weight based on 100 parts by weight of the metal carbonate.

Examples of the calcium salt include calcium sulfate, gypsum, calcium diphosphate and the like.

The above-mentioned refractory resin composition (4) is one kind selected from the above-mentioned resin components, phosphorus compounds, polyhydric alcohols and metal carbonates of alkali metals, alkaline earth metals and Group IIb metals of the periodic table. Consisting of the above, the phosphorus compound,
The total amount of polyhydric alcohol and metal carbonate is
The amount is preferably 50 to 900 parts by weight relative to 0 parts by weight, and the weight ratio of the polyhydric alcohol to the phosphorus compound [(polyhydric alcohol) / (phosphorus compound)] is preferably 0.05 to 20. The weight ratio of the metal carbonate to the phosphorus compound [(metal carbonate) / (phosphorus compound)] is preferably 0.01 to 50.

The refractory resin composition (5) comprises the resin component, a phosphorus compound, neutralized heat-expandable graphite, a polyhydric alcohol, an alkali metal, an alkaline earth metal and Group IIb of the periodic table. The total amount of the phosphorus compound, the neutralized thermally expandable graphite, the polyhydric alcohol and the metal carbonate is 50 to 50 parts by weight based on 100 parts by weight of the resin. 900 parts by weight are preferred.

The refractory resin compositions (1) to (5) are
It is preferably used as a sheet having tackiness and / or adhesion. Since the above-mentioned fire-resistant expansion sheet has adhesiveness and / or adhesiveness, it can be easily adhered to a steel frame or a non-combustible material layer, and workability at the time of a fire-resistant coating work of a steel frame is improved. The resin composition exhibits sufficient heat insulating performance due to thermal expansion, can be formed into a sheet, and has excellent handleability.

In order to impart tackiness to the fire-resistant expanded sheet, for example, a tackifier may be added to the resin. The tackifier is not particularly limited, and includes, for example, tackifier resins, plasticizers, fats and oils, low-polymerized polymers, and the like.

In the present invention, a flame retardant, an antioxidant, a metal harm inhibitor, an antistatic agent, a stabilizer, etc. may be added to the resin composition constituting the refractory inflatable sheet as long as the physical properties of the resin composition are not impaired. Agents, crosslinking agents, lubricants, softeners, pigments and the like may be added.

The refractory resin composition can be obtained by melt-kneading the above components using a conventionally known kneading device such as an extruder, a Banbury mixer, a kneader mixer, and a two-roller. The obtained fire-resistant resin composition can be formed into the fire-resistant expanded sheet by a conventionally known molding method such as press molding, extrusion molding, and calendar molding.

The thickness of the refractory expansion sheet is 0.2 to
10 mm is preferred. When the thickness is less than 0.2 mm, sufficient heat insulating properties are not exhibited even when expanded, and when the thickness exceeds 10 mm, not only the degree of freedom of construction is reduced, but also the weight becomes heavy and the handleability deteriorates. More preferably, it is 1 to 6 mm.

The face material made of the non-combustible material is not particularly limited as long as it is made of a material having non-combustibility. For example, a metal plate material such as a steel plate, a galvanized steel plate, a stainless steel plate, an aluminum zinc alloy plate; Metal mesh; glass paper,
Rock wool paper, ceramic wool paper; rock wool felt, ceramic wool felt, glass felt,
A thin leaf such as alumina silica felt may be mentioned, and a plurality of these may be laminated.

The thickness of the face material made of the noncombustible material is as follows:
0.1-1 mm is preferred. When the thickness is less than 0.1 mm, the performance as a flameproof material is not sufficiently exhibited, and the handleability is deteriorated. On the other hand, if the thickness exceeds 1 mm, it may fall from the refractory inflatable sheet in a normal use state and block a ventilation hole described later.

[0047]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view schematically showing a parting member for refractory ventilation according to the present invention.
In FIG. 1, reference numeral 10 denotes a fire-resistant ventilation parting member in which a ventilation member 2 is superimposed on a support member 1 in a stepped manner. The support member 1 and the ventilation member 2 are formed from a single plate by bending in this example.

As the material of the fire-resistant ventilation parting member, for example, metals such as aluminum, stainless steel plate, galvanized steel plate and the like are preferable.

A plurality of ventilation holes 22 are provided on the bottom 21 of the ventilation member 2, and on the inner surface of the upper side 23 of the ventilation member 2, a face material 4 made of a noncombustible material
2 are stacked and attached in the order shown.
The shape of the ventilation hole 22 may be any shape such as a circle, an ellipse, and a square.

In the present embodiment, the laminated body 4 is formed by previously laminating a fire-resistant expansion sheet 41 and a face material 42 made of a nonflammable material. The body 4 can be attached by pressing it on the inner surface of the upper side 23 of the ventilation member 2. If the adhesiveness is insufficient, the adhesive may be attached using an adhesive.

When the fire-resistant ventilation parting member 10 is exposed to a flame from below the ventilation member 2 and becomes high in temperature, the fire-resistant expansion sheet 41 thermally expands and loses its adhesiveness. The surface member 42 made of flakes is peeled off and falls off, and the ventilation hole 22 is blocked to prevent the invasion of the flame. Next, the refractory expansion sheet 41 thermally expands to fill the inside of the ventilation member 2, and the face material 42 made of a noncombustible material is used.
To ensure that the ventilation holes 22 are shielded.

The refractory expansion sheet 41 and the face material 42 made of a noncombustible material may be attached to the inner surface of the side 24 of the ventilation member 2 as shown in a schematic sectional view of FIG. In this configuration, when the fire-resistant expansion sheet 41 expands, the face material 42 made of a non-combustible material peels off and falls off, and falls down to the left side in FIG. 2 to shield the ventilation hole 22. When the sheet 41 expands and fills the inside of the ventilation member 2 and presses the face material 42 made of a noncombustible material, the same shielding effect as in the case of FIG. 1 is obtained. In the example of FIG. 2, the support member 1 and the ventilation member 2 are made by processing separate plate materials, respectively.
It may be integrally formed in advance.

When the fire-resistant ventilation parting member shown in FIG. 1 is to be constructed, as shown in FIG. 3, the fire-resistant ventilation parting member 10 in which the support member 1 and the ventilation member 2 are integrated is attached to the eaves back. It is fixed to the edge, and the side 24 of the ventilation member 2 is fixed to the outer wall. Next, an eave ceiling material is inserted into the support member 1. The ventilation member 2 is a laminate 4 of a fire-resistant expansion sheet 41 and a face material 42 made of a non-combustible material in advance.
Is attached to the ventilation member 2 such that the refractory expansion sheet 41 is in contact with the inner surface of the upper side 23 of the ventilation member 2.

When the fire-resistant ventilation parting member shown in FIG. 2 is to be constructed, the laminate 4 is attached to the inner surface of the side 24 of the ventilation member 2 in advance, and as shown in FIG. At the same time, the member 2 is fixed to the eaves back edge, and the upper side 23 of the ventilation member 2 is further fixed. Next, an eave ceiling material is inserted into the support member 1. As a fixing method, a normal fixing method such as nailing or screwing is used.

The ventilation parting member 10 is connected to the ventilation member 10 shown in FIG.
As shown in (1), by fixing to the outer wall, a ventilation hole can be provided between the outer wall and the eave ceiling, and the ventilation hole can be quickly shielded in case of fire.

(Example 1) 42 parts by weight of butyl rubber, 50 parts by weight of polybutene, 8 parts by weight of a tackifying resin, 100 parts of ammonium polyphosphate ("Sumisafe P" manufactured by Sumitomo Chemical Co., Ltd.)
8 parts by weight of neutralized heat-expandable graphite (“CA-60S” manufactured by Nippon Kasei Co., Ltd.) and 100 parts by weight of aluminum hydroxide (“B703S” manufactured by Nippon Light Metal Company) are melt-kneaded using a roll. Thus, a fire-resistant resin composition was obtained. The obtained resin composition was treated at 90 ° C. with a T-die extruder to a pH of 0.1.
It was extruded onto a 24 mm-thick galvanized steel sheet (a face material made of a noncombustible material) to obtain a 2 mm-thick laminate in which a refractory expansion sheet was laminated on a galvanized steel sheet (a face material made of a noncombustible material). .

Next, as shown in FIG. 1, a fire-resistant ventilation parting member was attached to the laminated body above the ventilation hole.

As shown in FIG. 3, the fire-resistant ventilation parting member was fixed to an outer wall (ALC plate, “Hebel” manufactured by Asahi Kasei Corporation, 575 mm long × 575 mm wide × 75 mm thick) as an eave ceiling material. A wall specimen using a calcium silicate plate was prepared. This wall test piece was JIS A 130
The sample was heated for 30 minutes in accordance with the standard heating curve specified in No. 4 to perform a fire resistance test. After completion of the fire resistance test, the opening of the fire-resistant ventilation parting member was visually observed. As shown in a schematic perspective view in FIG. 5, the ventilation holes 22 were completely shielded by the galvanized steel sheet 42. The fire-resistant expansion sheet 41 expanded and filled the inner surface of the ventilation member 1.

(Example 2) As shown in FIG. 2, a fire-resistant ventilation parting member was attached to the laminate obtained in Example 1, as shown in FIG. This fire-resistant ventilation parting member was fixed to an outer wall (ALC plate similar to that of Example 1) as shown in FIG. 4 to prepare a wall test body, and then a fire resistance test similar to that of Example 1 was performed. When the opening of the fire-resistant ventilation parting member was visually observed, the ventilation hole was completely shielded as in Example 1.

[0060]

The fire-resistant ventilation parting member of the present invention has the above-described structure, and is usually provided with air permeability by a large number of ventilation holes. Since the surface material made of the material covers the ventilation hole by closing the ventilation hole, it can be suitably used for a house having both ventilation and fire resistance.

[Brief description of the drawings]

FIG. 1 is a sectional view schematically showing one embodiment of a fire-resistant ventilation parting member of the present invention.

FIG. 2 is a cross-sectional view schematically showing another embodiment of the fire-resistant ventilation parting member of the present invention.

FIG. 3 is a cross-sectional view schematically showing a state in which the fire-resistant ventilation parting member of FIG. 1 is attached to an outer wall.

FIG. 4 is a cross-sectional view schematically showing a state in which the partition wall for fire-resistant ventilation in FIG. 2 is attached to a wall body.

FIG. 5 is a perspective view schematically showing a state in which a ventilation hole of a fire-resistant ventilation parting member is shielded by a fire resistance test.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support member 2 Ventilation member 4 Laminated body 10 Parting member for fireproof ventilation 21 Bottom surface 22 Ventilation hole 23 Top side 24 Side 41 41 Fireproof expansion sheet 42 Face material

Continued on front page F-term (reference) 2E129 CA43 CA54 CB01 CB02 CB03 CB06 CB07 CB21 CE02 CF09 DA18 DA22 DA26 DA29 4J002 BB181 DA027 DA056 DE078 DE088 DE098 DE108 DE118 DE138 DE148 DE238 DE268 DE288 DG048 DG058 DH046 DJ0DJ DJ008 008 FA048 FB077 FD018 FD206 FD207 GL00

Claims (2)

[Claims] 1. A ventilation parting member in which a ventilation member having a U-shaped cross section is superimposed in a stepped manner on a supporting member having a U-shaped cross section for supporting an eaves ceiling, A fire-resistant ventilation parting member, comprising a number of ventilation holes, and a fire-resistant expansion sheet and a face material made of a non-combustible material laminated in order on an inner surface of an upper side or an inner surface of a side of the ventilation member. 2. The fire-resistant expansion sheet according to claim 1, wherein the butyl rubber is
2. A parting member for fire-resistant ventilation according to claim 1, wherein the parting member is made of a fire-resistant resin composition comprising a phosphorus compound, neutralized heat-expandable graphite and an inorganic filler.