JP2002201732A - Fireproof joint and fireproof connection - Google Patents

Abstract

(57) [Summary] [Problem] To provide a joint structure having fireproofing properties at joints and easy construction. A heat-expandable fire-resistant member (10) capable of forming a fire-expandable layer (11) whose volume significantly expands in the event of a fire is stuck to wood-cut surfaces (1a, 2a), which become joints of fire-resistant outer wall panels (1, 2). Or it is inserted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof joint structure having fire resistance and fire resistance formed at a connection portion (joint portion) of a building outer wall, or a connection portion (vent) between a roof and an outer wall,
The present invention relates to a fireproof and fireproof connection structure having a fireproof property and a fireproof property formed at a connection portion (air vent) between a roof and an eave ceiling.

[0002]

2. Description of the Related Art In recent years, members used for inner and outer walls of general buildings have been required to have fire resistance and fire resistance. Along with this, fire protection and fire resistance (hereinafter referred to as fire prevention and fire resistance) are required for the connection part (joint part) of the outer wall in addition to the conventionally required water tightness. The connection part (air hole) and the connection part (air hole) between the roof and the eaves ceiling are required to have fire resistance and fire resistance in addition to air permeability.

[0003] The joints of the outer wall are required to have fireproof and fireproof properties such that the backside has no flame penetration and that if the joints are covered with a member, the temperature of the member is reduced. Is required to have a heat shielding property of not more than 260 ° C.

[0004] From such a viewpoint, it is necessary to prevent the connecting portion of the outer wall from being protected.
Various techniques for providing fire resistance have been proposed. For example, according to JP-A-8-81674, the carbonized layer film formed by foaming by heating shows a large volume expansion,
A fire-resistant sealing material (sealant) capable of suppressing invasion of a flame has been proposed, and the sealing material is used by being injected or applied to joints.

Japanese Patent Laid-Open Publication No. Hei 8-209891 discloses a method of attaching a fire-resistant gasket to a joint.

[0006] On the other hand, the connection between the roof and the outer wall is required to have fire and fire resistance such that the flame does not penetrate into the roof or the back of the outer wall, and the connection is covered with a member. If the temperature of the structural members supporting the roof load is up to 450 ° C
Hereinafter, it is required to have a heat shielding property of 350 ° C. or less on average.

The connection between the roof and the outer wall (air hole) and the connection between the roof and the eaves ceiling (air hole) are protected by the connection part.
Japanese Patent Application Laid-Open No. H11-264603 discloses a method of completely closing a ventilation hole with a steel plate in order to impart fire resistance, or a method of attaching a gasket having fire resistance and performing ventilation in a roof at normal times. As disclosed in the official gazette, a method of attaching a shape memory damper having a function of closing the ventilation hole only at the time of fire heating to the ventilation hole of the eaves fireproof material and the outer wall material is used.

[0008]

When a sealing material is injected or applied to a connection portion of an outer wall, the injection or application operation requires skill and construction time, and if the installation is insufficient, the sealant is jointed in a fire. From the joints, the flame-shielding effect becomes insufficient, and there is a risk that the flame may penetrate from the joints in the event of a fire. In addition, there is a problem that this injection or coating construction must be performed on site, and in many cases, a scaffold is provided on the entire building.

On the other hand, a method of attaching a fire-resistant gasket to the joint can be performed relatively easily in a short time, but there is a problem that the gasket itself used in the joint is expensive.

[0010] Although primary waterproofing can be performed by applying a sealant or attaching a gasket, secondary waterproofing is further required to maintain watertightness corresponding to water due to capillary action.

For this secondary waterproofing, there is a method in which a butyl tape or the like is attached to the opening of a wall panel and a backup material such as foamed polyethylene is fitted. In this case, the butyl tape is attached and the backup material is attached. And there is a problem that the construction becomes very complicated.

On the other hand, a connection part (vent) between the folded plate roof and the outer wall
If steel plates or fire-resistant gaskets are used to provide fire and fire resistance to the joints, ventilation in the roof cannot be secured during normal times, and moisture due to condensation etc. cannot escape outside, and the shape When a memory alloy damper is used, there is a problem that it is difficult to deal with expensive and complicated housing portions.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a joint structure in which joints of an outer wall are provided with fire resistance and fire resistance and which are easy to construct. .

A further object of the present invention is to provide a joint (air vent) between the folded-plate roof and the outer wall or a joint (vent) between the sloping roof and the eaves ceiling, and to perform construction. It is another object of the present invention to provide a connection structure which is simple and can secure ventilation in a roof.

[0015]

According to the first aspect of the present invention,
A fireproof joint structure characterized by attaching or inserting a heat-expandable fireproof member capable of forming a fire-resistant expansion layer whose volume significantly expands in the event of a fire, toward a wood-mouth surface serving as a joint part of a fire-resistant outer wall panel. It is.

Here, the heat-expandable refractory member can be stuck or inserted toward the cleave surface at the construction site. However, when assembling a building unit or the like in a factory or the like, a joint is formed in advance. The heat-expandable refractory member may be fixed directly or indirectly to the wood edge of the outer wall panel by sticking or the like.

According to the first aspect of the present invention, the insertion or sticking of such a heat-expandable refractory member can be performed without requiring a technique as compared with the conventional injection or application of a sealant. The refractory fireproof member is provided by a simple construction method of directly or indirectly attaching or inserting it to a wooden edge surface or the like serving as a joint portion of a fireproof outer wall panel or to a roof and an outer wall.

Here, the joints may be filled with the heat-expandable refractory member in the joint structure, but the joints may not necessarily be filled with gaps. In the event of a fire, if the heat-expandable refractory member expands toward the front of the wood and the joints are filled with the expanded fire-resistant expansion layer, the flame can be blocked, and the flame does not penetrate to the back surface. Moreover, the propagation of heat through the joints is suppressed by the filled refractory expansion layer, whereby the temperature rise to the back surface of the outer wall panel can be suppressed.

Further, if the heat-expandable refractory member is constructed at a factory or the like, the heat-expandable member can be directly or indirectly fixed to the wood edge under high quality control. This ensures that the thermal expansion member does not fall off from the joint in the event of a fire and that the flame can be reliably blocked.

As such a heat-expandable refractory member, for example, one having a volume expansion ratio after heating for 30 minutes under a heating condition of 50 kW / m ² of 3 times or more and 100 times or less of the volume before heating. preferable. By selecting a high-expansion refractory material with a thickness of 3 times or more, even if there is a gap between joints when a unit building is assembled by using a thin thermally-expandable refractory member, this thermal-expansion refractory The member can be inflated toward the lip end to reliably fill the joints.

Further, if a material in which a buffer material is laminated on an inner layer or an outer layer is used as the heat-expandable refractory member, the buffer material becomes a buffer material, and insertion of the heat-expandable refractory member becomes easy.

Further, if a water-tight elastic material is laminated as the heat-expandable fire-resistant member, the heat-expandable fire-resistant member can be adhered or inserted to the edge of the wood to achieve watertightness at the joint in the case of the outer wall. .

The above-described heat-expandable refractory member includes, for example, a heat-expandable refractory material layer in which a buffer material is laminated on one surface and a water-tight elastic material is laminated on the other surface. It includes a structure in which a layer of a watertight elastic material is laminated on one surface.

If a heat-expandable refractory member having a pressure-sensitive adhesive layer laminated on the outermost surface is used, it can be easily and reliably adhered to a wooden surface or the like.

Here, it is sufficient that the pressure-sensitive adhesive layer has such an extent that it can be temporarily fixed. In this case, after the temporary fixing, it is fixed with a tucker, a nail, or the like. Therefore, the pressure-sensitive adhesive layer may cover the entire surface of the application surface, may be partial, or may be scattered.

According to the sixth aspect of the present invention, there is provided a ventilation hole formed between a folded-plate roof and a fire-resistant outer wall panel. A fireproof connection structure characterized by attaching or inserting a heat-expandable fireproof member capable of forming an expansion layer.

According to the seventh aspect of the present invention, the eaves of the folded plate roof have an upper shape along the uneven shape of the lower surface of the folded plate, and a ventilation hole is removed between the folded plate roof and the outer wall panel. Attach the front door cover to shield the door, and make the gap formed between the folded plate roof and the front door cover a ventilation hole, make the gap between the lower surface of the folded plate and the upper surface of the front door cover almost constant, and 7. The fireproof connection structure according to claim 6, wherein a thermally expandable fireproof member is attached or inserted into a ventilation hole formed between the flat roof and the face door cover.

The invention according to claim 8 is characterized in that a heat-expandable refractory material layer member is inserted or affixed to a portion of the face door cover facing the folded plate roof. Structure.

According to a ninth aspect of the present invention, an eaves ceiling is provided on a lower surface side of an inclined roof projecting outward from a house frame to the tip of the inclined roof. A fire-resistant fire-resistant material, wherein a heat-expandable fire-resistant material capable of forming a fire-resistant expansion layer whose volume significantly expands in the event of a fire is attached or inserted in a direction of closing the air hole in the air hole between the inclined roofs. Connection structure.

According to a tenth aspect of the present invention, there is provided the fire-resistant connection structure according to the ninth aspect, wherein a mesh member for preventing the heat-expandable refractory member from scattering and falling is provided in the vent hole.

According to an eleventh aspect of the present invention, the heat-expandable refractory member has a volume expansion ratio after heating for 30 minutes under a heating condition of 50 kW / m ² of at least 3 times the volume before heating.
The fireproof connection structure according to any one of claims 6 to 8, wherein the number is not more than twice. By selecting such a fire-resistant material, the space for the ventilation holes on the folded plate roof and the outer wall, the sloping roof and the eaves ceiling is normally secured, and in the event of a fire, this heat-expandable fire-resistant material is directed toward the facing surface of the ventilation hole. To ensure that the gap is filled

According to a twelfth aspect of the present invention, the heat-expandable refractory member contains 50 to 400 parts by weight of an inorganic filler with respect to 100 parts by weight of a thermoplastic resin or an epoxy resin, and at least a layered inorganic material which expands when heated. 20 to 3
The fireproof connection structure according to any one of claims 1 to 8, which is a fireproof member containing 50 parts by weight.

Here, the attachment or insertion of the heat-expandable refractory member can be carried out even at the construction site. This heat-expandable refractory member may be fixed directly or indirectly to a roof, a tight frame, a face door cover, an eaves ceiling, a cover of a nose, or the like.

In the event of a fire, the heat-expandable refractory member expands and fills the air holes, so that no flame penetrates into the back surface of the outer wall or the inside of the roof, and the filled heat-expandable refractory member transmits heat. Thus, the temperature rise on the back surface of the outer wall or inside the roof can be suppressed.

As such a heat-expandable refractory member, for example, one having a volume expansion ratio after heating for 30 minutes under a heating condition of 50 kW / m ² of 3 times or more and 100 times or less of the volume before heating. preferable. Also, if a heat-expandable refractory member having a pressure-sensitive adhesive layer laminated on the outermost surface is used, it can be easily and reliably adhered to a kiguchi surface or the like.

[0036]

FIG. 1 shows a building to which a joint structure according to an embodiment of the present invention is applied, in which a box-shaped building unit pre-assembled in a factory is transported to a construction site, and assembled in the construction site. It is a figure which shows an example of the joint structure of the unit building constructed.

The lower-floor building unit U2 and the upper-floor building unit U1 are transported from the factory, and the upper-floor building unit U1 is joined to the lower-floor building unit U2 at a location (not shown) by bolting or the like at a construction site. A unit building U is formed. These upper and lower building units U1, U
2, outer wall panels 1 and 2 are fixed in advance at a factory via studs and the like (not shown).

These outer wall panels 1 and 2 are provided with fire and fire resistance and are made of a non-combustible material or a quasi-non-combustible material. For example, gypsum board, hard wood chip cement board, fiber mixed cement board, fiber mixed alumina A silicate plate, an autoclave-cured lightweight cellular concrete plate (ALC) alone, a laminated plate with a metal frame, or the like is preferably used.

Thus, the opening 1a serving as a joint between the lower-floor building unit U2 and the upper-floor building unit U1,
A gap forming the joint 3 is formed in 2a.

Waterproof sheets 6, 6 extend from the upper surface 5a of the girder 5 of the lower-floor building unit 1 and the back surface 2b of the outer wall panel 2 onto the front of the kiguchi 1a.

At the lower end 2a of the outer wall panel 2, a sheet-like heat-expandable refractory member 1 used in the present invention at a factory is provided.
Reference numeral 0 is attached in advance with an adhesive or an adhesive, and is fixed by a tucker (not shown) or nailing.

In the fireproof joint structure according to the present invention, the thermally expandable refractory member 10 expands in the event of a fire, and as shown in FIG. The fire-resistant expansion layer 20 that completely fills (between the kiguchi 2a and the waterproof sheet 6) is formed.

As a result, the joint portion 3 is filled with the refractory expansion layer 20 formed by the expansion, and the flame is blocked. In addition, the penetration of the flame into the interior of the building is eliminated, and the propagation of heat through the joints 3 is suppressed by the filled refractory expansion layer 20, whereby the outer wall panels 1,
2 can also suppress the temperature rise to the back surface.

The attachment and fixation of the heat-expandable refractory member 10 to the cut surface 2a are performed in a factory or the like.
The construction is easy, and the heat-expandable refractory member 10 can be securely fixed to the cut edge 2a under high quality control. Thereby, the thermal expansion-resistant refractory member 10 does not fall off from the front end 2a for a long period of time, so that it is possible to reliably perform flame shielding even for a fire that is not known when it will occur.

This heat-expandable refractory member 10 is shown in FIGS.
As shown in FIG. 1, the heat-expandable refractory material is uniformly formed in a longitudinal direction formed by extrusion molding or the like, for example, in the form of a film, a sheet, a plate, a rod, or the like. The cross section is a square, a circle, an ellipse, a polygon, a free shape, or the like. Further, the heat-expandable refractory member 10 includes a layer (heat-expandable fire-resistant member layer) 11 made of a heat-expandable refractory material on a core layer or a surface layer, and a buffer layer 13 made of a buffer material as a surface layer or a core layer. Cut edges 1a, 2a of joint 3
A watertight elastic layer 14 and an adhesive layer 12 may be provided on the surface in contact with the like.

The size of the heat-expandable refractory member 10 is not particularly limited. However, the width of the joint 3 to be flame-shielded (the distance between the opening 1a and the opening 2a), the shape of the joint 3, It is appropriately set in consideration of the volume expansion coefficient, shape, price, etc. of the heat-expandable refractory material.

The thickness of the portion made of the heat-expandable refractory material is usually preferably about 1 to 50% of the width of the joint 3 with respect to the width of the joint 3. If the thickness is too thin, the flame barrier property for preventing the penetration of the flame to the target back surface is reduced. On the other hand, the thicker the thickness is, the more advantageous in fire resistance, waterproofness, etc. There is no performance problem such as flammability, but the cost increases. This width is the total thickness of a plurality of layers made of a thermally expandable refractory material.

For example, such a thermally expandable refractory member 10 has joint portions 3 having uniform gaps in the longitudinal direction.
Alternatively, it is easy to attach or insert to the cut edges 1a, 2a of the wall panel, and it is possible to uniformly stick or insert in the longitudinal direction between the cut edges.

The thickness of the buffer layer 13 is set according to the gap at the joint used. Those having a width of about 50 to 300% with respect to the width of the joint portion 3 are generally used. If the width is less than 50% of the width of the joint, the buffer function at the time of filling the target joint 3 becomes insufficient.
If it exceeds 00%, the workability at the time of filling the joint portion 3 is inferior.

The thickness of the watertight elastic layer 14 is not particularly limited, but is generally in the range of 0.1 mm to 3 mm. If the thickness of the watertight elastic layer 14 is small, it is difficult to obtain the desired waterproofness. If the thickness is larger than 3 mm, the flame retardancy of the heat-expandable refractory member 10 itself may be reduced.

The thickness of the pressure-sensitive adhesive layer 12 is not particularly limited, but a thickness in the range of 0.1 mm to 2 mm is generally used. When the thickness of the pressure-sensitive adhesive layer is small, the waterproof property is difficult when the purpose is waterproof, and when the thickness is larger than 2 mm, the flame retardancy of the heat-expandable refractory member 10 itself may be reduced. .

The heat-expandable refractory member 10 shown in FIG. 3 is a sheet (or tape) made of a heat-expandable refractory material.
From the heat-expandable refractory layer 11. The heat-expandable refractory member 10 can be stored or provided in a state wound around a roll or the like.

The heat-expandable refractory member 10 shown in FIG. 4 is provided with an adhesive layer 12 laminated on one surface of a heat-expandable refractory member layer 11 by coating or the like.

Although the pressure-sensitive adhesive layer 12 is provided uniformly over the entire surface in FIG. 4, it may be provided partially or interspersed. The heat-expandable refractory member 10 can be conveniently stored or provided in a state of being wound around a roll if a release paper is attached to the surface to which the adhesive layer 12 is provided.

In the thermally expandable refractory member 10 shown in FIG. 5, a buffer layer 13 made of a substantially rectangular buffer material is sandwiched (as a core layer) between a pair of thermally expandable refractory member layers 11 parallel to each other. Configuration. Such a heat-expandable refractory member 10 is formed, for example, by forming each member layer by extrusion molding and joining them with an adhesive.

The heat-expandable refractory member 10 shown in FIG.
Is a form in which a cylindrical heat-expandable refractory member layer 11 is laminated around a circular rod-shaped buffer layer 13. This cross section is not limited to a circle, but may be a polygon such as a square, and the corners thereof may be chamfered.

The thermally expandable refractory member 10 having such a configuration
Is formed by forming a cylindrical heat-expandable refractory member layer 11 by extrusion, opening one side surface 11a in the longitudinal direction, and pushing a rod-shaped buffer layer 13 formed by extrusion or the like into the opening. Is done. Of course, it may be formed by coextrusion, or may be formed by another method.

As shown in FIGS. 7 and 8, a heat-expandable refractory member layer 11 may be used as a core layer. In these heat-expandable refractory members 10, a heat-expandable fire-resistant member layer 11 is used as a core layer, and a buffer layer 13 is laminated as a surface layer. In addition,
Since the number of layers of the heat-expandable refractory member 11 in FIGS. 7 and 8 is one, the thickness or volume of the layer is larger than that of the layers 11 of FIGS. 5 and 6.

In FIG. 8, one side surface of the hollow resin foam as the buffer layer 13 is cut off as shown by the reference numeral 13a, and a circular rod-shaped heat-expandable refractory member layer 1 is formed inside.
Although 1 is inserted, the cut 13a may not be provided.

Each of the heat-expandable refractory members 10 shown in FIGS. 9 to 11 is a member for insertion into the joint portion 3, and has a width larger than the width between joints so that it can be pressed into the joint portion 3. It is configured to be high and has moderate elasticity or flexibility. The heat-expandable refractory member 10 shown in FIG. 9 is an elastic material composed of only the heat-expandable fire-resistant member layer 11, and is press-fitted between the kiguchis 1a and 2a and supported while being bent at the center in the direction of the arrow. It is fixed and supported by elasticity or by a suitable adhesive or adhesive.

The heat-expandable refractory member 10 shown in FIG.
The structure in which the thickness of the central portion is reduced on the back side of the heat-expandable refractory member layer 11 having flexibility or elasticity and the buffer layer 13 whose thickness is increased toward both sides is fixed by an adhesive or the like. It has been. As a result, the heat-expandable refractory member 10 is held at the joint 3 by being bent at the central portion and pressed into the gaps 1a and 2a in the direction of the arrow and supported by the buffer layer 13.

The heat-expandable refractory member 10 shown in FIG.
Is a wedge-shaped configuration in which the width is gradually reduced from one side surface 10a toward the other side surface 10b, and both side surfaces 10c and 10d are discontinuous. It is configured to be easily inserted into the joint 3 from the narrow side surface 10b. Such a modified example is used for, for example, a known primary water stop gasket, and may be the same as the primary water stop gasket described in the drawing of Japanese Patent Application Laid-Open No. Hei 8-209891, for example. .

The above-described heat-expandable refractory member 10 has the structure shown in FIG.
2. As shown in FIG. 13, the kiguchi 2a (or kiguchi 1
In order to maintain the watertightness between (a) and (a), a watertight elastic layer 14 may be laminated on the side that comes into contact with the wood edge 2a or the like.

The heat-expandable refractory material used in the present invention is a conventionally used fire-resistant heat-insulating layer (fire-resistant expansion layer).
Is a heat-expandable refractory material whose volume significantly expands in the event of a fire.

Examples of such a heat-expandable refractory material include, for example, a product name of Fire Barrier (a sheet material made of a resin composition containing chloroprene rubber and vermiculite) and a trade name of Mitsui Kinzoku Co., Ltd. (A sheet material comprising a resin composition containing a resin and heat-expandable graphite).

The heat-expandable refractory material may be a material comprising a thermoplastic resin or an epoxy resin and an inorganic filler containing a layered inorganic material which expands when heated.

Examples of the thermoplastic resin include polyolefin resins such as polypropylene resin and polyethylene resin; poly (1-) butene resin, polypentene resin, polystyrene resin, acrylonitrile-butadiene-styrene (ABS) resin, and polycarbonate resin. Resin, polyphenylene ether-based resin, acrylic resin, polyamide resin, polyvinyl chloride-based resin, phenol-based resin, polyurethane-based resin, and the like.

The sheet using the epoxy resin is excellent in shape retention because the fire-resistant expansion layer 20 after expansion has a crosslinked structure, and even if the thickness of the material is reduced and the expansion ratio is increased,
Flame shielding can be suitably performed. These epoxy resins are not particularly limited, but are basically obtained by reacting a monomer having an epoxy group with a curing agent.

Examples of the monomer having an epoxy group include difunctional glycidyl ether type, glycidyl ester type, and polyfunctional glycidyl ether type.

The bifunctional glycidyl ether type includes polyethylene glycol type, polypropylene glycol type, neopentyl glycol type, 1,6-hexanediol type, trimethylolpropane type, propylene oxide-bisphenol A type, hydrogenated bisphenol A
And the like.

Examples of the glycidyl ester type include hexahydrophthalic anhydride type, tetrahydrophthalic anhydride type, dimer acid type, p-oxybenzoic acid type and the like, and polyfunctional glycidyl ether types include phenol novolak type. , Ortho-cresol novolak, DP
P (diphenyl-p-phenol) novolak type, dicyclopentadiene phenol type and the like can be mentioned.
These may be used alone or as a mixture of two or more.

The curing agent may be a polyaddition type or a catalyst type, and the method for curing these epoxy resins is not limited. Examples of the polyaddition type include polyamines, acid anhydrides, polyphenols, and polymercaptans, and examples of the catalyst type include tertiary amines, imidazoles, and Lewis acid complexes.

As such an inorganic filler, silica,
Diatomaceous earth, alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, ferrites, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, basic magnesium carbonate, calcium carbonate, magnesium carbonate , Zinc carbonate, barium carbonate, dawsonite, hydrotalcite, calcium sulfate, barium sulfate, gypsum fiber, calcium silicate, 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, zircon titanate Lead, aluminum borate,
Examples include molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powders, slag fiber, fly ash, and inorganic phosphorus compounds. These may be used alone or in combination of two or more.

Among these, metal carbonates represented by calcium carbonate and zinc carbonate, which play an aggregate role, and hydrated inorganic substances are particularly preferred. Hydrous inorganic substances represented by aluminum hydroxide and magnesium hydroxide can impart an endothermic effect upon heating in addition to the role of aggregate.

Inorganic phosphorus compounds are preferably used for improving the flame retardancy. Examples thereof include red phosphorus; metal phosphates such as sodium phosphate, potassium phosphate and magnesium phosphate; and ammonium polyphosphates. Is mentioned. Among these, ammonium polyphosphates are preferred.

The layered inorganic material that expands when heated is not particularly limited, and examples thereof include vermiculite, kaolin, mica, and heat-expandable graphite. Among these, since the foaming start temperature is low, the heat-expandable graphite is suitably used as a material for forming the heat-expandable refractory member of the present invention.

The thermally expandable graphite has a particle size of 20 to
Preferably it is in the range of 200 mesh. When the particle size is smaller than 200 mesh, the degree of expansion of graphite becomes small, and it becomes difficult to obtain a sufficient refractory heat insulating layer. On the other hand, when the particle size is larger than 20 mesh, there is an advantage that the degree of expansion of the graphite increases, but the dispersibility of the graphite when kneaded with the resin is inferior, and the physical properties may decrease.

Such a heat-expandable graphite is a known substance. Powders such as natural scaly graphite, pyrolytic graphite and quiche graphite are mixed with inorganic acids such as concentrated sulfuric acid, nitric acid and selenic acid, concentrated nitric acid and perchloric acid. A crystalline compound that has been treated with a strong oxidizing agent such as perchlorate, permanganate, dichromate, hydrogen peroxide, etc. to produce a graphite intercalation compound, while maintaining a layered structure of carbon. It is.

As described above, the heat-expandable graphite obtained by the acid treatment is obtained by further neutralizing with a neutralizing agent such as ammonia, an aliphatic lower amine, an alkali metal compound or an alkaline earth metal compound. Is good.

Examples of such an aliphatic lower amine include monomethylamine, dimethylamine, trimethylamine,
Ethylamine, propylamine, butylamine and the like can be mentioned. Examples of the alkali metal compound or alkaline earth metal compound include hydroxides, oxides, carbonates, lead sulfates, and organic acid salts of potassium, sodium, calcium, barium, magnesium and the like.

Specific examples of the heat-expandable graphite thus neutralized include, for example, GRAF (trade name, manufactured by UCAR CARBON).
GUARD, a brand name GREP-EG manufactured by Tosoh Corporation, and the like.

These inorganic fillers are 50 to 400 parts by weight of an inorganic filler containing 20 to 350 parts by weight of a layered inorganic substance which expands upon heating based on 100 parts by weight of a thermoplastic resin or an epoxy resin. It is preferred to contain.

When the amount of the layered inorganic substance is less than 20 parts by weight,
Insufficient expansion ratio makes it difficult to obtain a sufficient flame shielding effect. If the amount exceeds 350 parts by weight, the cohesive force is insufficient, and it is difficult to obtain shape retention (strength) as a molded product.

If the amount of the inorganic filler containing the layered inorganic compound is small, the amount of the residue after combustion is reduced, so that a sufficient refractory heat insulating layer cannot be obtained. In addition, since the ratio of combustibles increases, flame retardancy decreases. On the other hand, if the amount of the inorganic filler is more than 400 parts by weight, the compounding ratio of the resin binder decreases, and the adhesive strength becomes insufficient.

The resin composition may contain a flame retardant, an antioxidant, a metal harm inhibitor, an antistatic agent, a stabilizer, a crosslinking agent, a lubricant, a softener, a pigment, etc. as long as the effects of the present invention are not impaired. May be done. Further, a tackifier may be added to impart tackiness to the molded product.

[0086] The above resin composition is composed of a single screw extruder,
Twin screw extruder, Banbury mixer, kneader mixer,
After being supplied to a conventionally known kneading device such as a two-roll mill and melt-kneaded, it can be formed into a free shape such as a sheet by a conventionally known molding method such as extrusion molding or calendering.

In the heat-expandable refractory member 10 described above, the heat-expandable fire-resistant member layer 11 has a thickness of 50 kW / m ^2.
It is preferable that the volume expansion ratio after heating for 30 minutes under heating conditions is 3 times or more and 100 times or less of the volume before heating, and particularly that the expansion in the thickness direction under this condition is 3 times or more. preferable.

By selecting a high-expansion material having an expansion ratio of 3 times or more, by using a heat-expandable refractory member having a small thickness, even if there is a gap between joints when the unit building is assembled, a fire may occur. At times, the heat-expandable refractory member can be expanded toward the lip end to reliably fill the space between joints. In addition, when a material having a small volume expansion is used, a thick heat-expandable refractory member is required, which increases the cost.

On the other hand, there is no upper limit to the thermal expansion ratio, but if the expansion ratio is too high, the mechanical strength of the heat-expandable refractory member layer formed after expansion becomes weak, and it is difficult to obtain a good flame-shielding effect. And generally less than 100 times.

Next, a resin foam, a nonwoven fabric or a woven fabric is used as the buffer material used in the present invention.

The resin foam has an expansion ratio of 5 to 5.
A foam of about 100 times is preferably used, and foams such as polyethylene foam, polypropylene foam, polyolefin foam, polystyrene foam, polyurethane foam, phenol resin foam, and isocyanate foam are used. Illustrated, these resin foams may be closed cell foams.

As the above-mentioned nonwoven fabric, not only organic nonwoven fabric such as polyester nonwoven fabric, polypropylene nonwoven fabric and acrylic resin nonwoven fabric, but also inorganic nonwoven fabric such as ceramic blanket, rock wool and glass wool are preferably used.

[0093] These inorganic nonwoven fabrics are wrapped with a resin film such as polyethylene to enhance the adhesiveness when other materials such as a watertight elastic material are laminated.

As the woven fabric, an organic fiber woven fabric such as a polyester woven fabric, a polypropylene woven fabric, and an acrylic resin woven fabric or an inorganic woven fabric is used.

As the watertight elastic material used in the present invention, rubber, closed cell type thermoplastic resin foam, or the like is used.

As the rubber, a conventionally used natural rubber, synthetic rubber or the like can be used as it is.
Examples of the synthetic rubber include butyl rubber, polychloroprene rubber, polybutadiene rubber, polyisoprene rubber, polyisobutylene rubber, styrene butadiene rubber, butadiene acrylonitrile rubber, nitrile rubber,
Examples include silicone rubber. These are 2
More than one species may be used in combination.

Examples of the closed-cell thermoplastic resin foam include polyethylene foam, polypropylene foam, polyolefin foam, polystyrene foam, polyurethane foam, phenol resin foam, and isocyanate foam. A closed cell type foam such as a system foam is exemplified as a preferable one, and its expansion ratio is 5 to 100.
A double range is preferred. When the watertight elastic material is a closed-cell type thermoplastic resin foam, the waterproofness may be inferior. Therefore, an adhesive layer is usually laminated.

As the pressure-sensitive adhesive layer, known pressure-sensitive adhesives conventionally used can be used. For example, an acrylic pressure-sensitive adhesive, butyl rubber, or the like is a suitable tackifier, and a material to which a petroleum resin or the like is appropriately added is used.

Such a watertight elastic material can also be used as a pressure-sensitive adhesive layer as long as it has adhesiveness. In the case where the above-mentioned buffer layer is formed on a wooden surface, the water-absorbing layer is not formed. When the material to be formed is selected from materials that maintain watertightness and elasticity, the material can also be used as a buffer layer.

Next, another example of the joint structure using a unit building as an example will be described with reference to FIGS. Detailed description of the same or equivalent parts as those in FIG. 1 is omitted. In FIG. 14, a pair of heat-expandable refractory members 10 and 10 are fixed to the upper surface 6a of the waterproof sheet 6 located above the cut surface 2a and the cut surface 1a by an adhesive. This heat-expandable refractory member 10 is substantially the same as that shown in FIG. 3 or FIG. 4, and after being temporarily fixed with an adhesive or an adhesive, each of the wood-cut surfaces 1a, 1a, 2a are fixed to each other with a gap therebetween.

Further, a secondary waterproof material 7 for maintaining water tightness is inserted between the girder 5 of the lower-floor building unit 1 and the girder 5 of the upper-floor building unit 2 so as to cover the joint 3. A decorative member 8 such as a trunk is fixed to the outer wall panel 1 by nailing or the like.

According to the joint structure configured as described above, the gap between the heat-expandable refractory members 10 and 10 is covered with the body plug 8 and is not visible from the outside. Further, since the secondary waterproof material 7 is interposed between the unit buildings U1 and U2 on the upper and lower floors, watertightness is maintained.

Further, since the heat-expandable refractory members 10 are provided in a pair at the top and bottom, the heat-expandable fire-resistant members 10 at the time of fire are used.
Expansion is ensured.

Further, in FIG. 15, both lip faces 1a,
2a, a pair of thermally expandable refractory members 10, 10 shown in FIG. 3 or FIG. 4 are fixed at a factory. Waterproof sheet 6
Is installed on the heat-expandable refractory member 10 at the time of assembling the unit building. As a result, a gap is formed between the pair of thermally expandable refractory members 10, 10, and a rod-shaped foam 131 whose outer peripheral surface has water tightness is press-fitted into the gap.

According to the joint structure configured as described above, the gap between the heat-expandable refractory members 10 and 10 is closed by the water-tight foam, so that secondary water stopping can be performed.

Further, according to this joint structure, the waterproof sheet 6 and the foam 13 are provided between the pair of heat-expandable refractory members 10 and 10.
Although other inclusions such as 1 are interposed, even if the foam 131 melts and flows in the event of a fire, the heat-expandable refractory member 10 immediately expands and fills the resulting gap,
Flame insulation can be maintained.

In FIG. 16, at the factory,
A heat-expandable refractory member 10 shown in FIG. 5 is temporarily fixed to an opening 2a of the outer wall panel 2 by an adhesive provided on one surface of the heat-expandable refractory member 10 and then fixed by a tucker or the like.

According to the joint structure constructed as described above, the heat-expandable refractory member 10 with the buffer material integrated in advance is fixed to the outer wall panel 2 by a factory or the like. Therefore, there is an advantage that the work of inserting the foam 131 at the construction site is not required.

Further, in FIG. 17, at the factory,
A mounting bracket 9a holding a gasket 9 is fixed to the front surface of the opening 1a of the outer wall panel 1 and a gasket receiving bracket 9b for receiving the gasket 9 is attached to the back surface 2b of the outer wall panel 2 in a state where the upper-floor building unit U2 is assembled. Fixed. On the back of the gasket receiving fitting 9b, a heat-expandable fire-resistant member 10 in which an aluminum plate 15 is laminated on the back of a heat-expandable fire-resistant member layer 11 is directed to the joint 3 at the construction site. Is affixed.

According to the joint structure configured as described above, the heat-expandable refractory member 10 is not directly visually recognized from the outside by the gasket 9. In the event of a fire, the gasket 9 temporarily blocks the flame. However, when the fire is severe, the heat-expandable refractory member layer 11 expands toward the joint 3 and the joint 3 has a fire-resistant expansion. Layer 20 (not shown) is filled.

As a result, the joint portion 3 is filled with the refractory expansion layer 20 formed by the expansion, and the flame is blocked. In addition, the penetration of the flame into the interior of the building is eliminated, and the propagation of heat through the joints 3 is suppressed by the filled refractory expansion layer 20, whereby the outer wall panels 1,
2 can also suppress the temperature rise to the back surface.

FIGS. 20 to 24 are diagrams according to embodiments of the present invention. FIG. 20 shows an example of an embodiment of a ventilation hole and a fireproof connection structure formed between a folded-plate roof and a fireproof / fireproof outer wall panel attached to the top-floor building unit. FIG. 21B is a cross-sectional view taken along line AA of FIG. 21A. FIG. 21 is a cross-sectional view of an example of a fireproof connection structure between a folded-plate roof and a fireproof outer wall, as viewed from the eaves front. FIG. 22 is a sectional view taken along line BB of FIG. FIG. 23 is a cross-sectional view of an example of a fireproof connection structure between a folded-plate roof and a fireproof outer wall viewed from the eaves end. FIG. 24 is a sectional view taken along line CC of FIG. FIG. 25 is a cross-sectional view showing an example of a fireproof connection structure between the inclined roof and the eaves ceiling. FIG. 26 is a cross-sectional view of a main part showing a modification of FIG.

In FIG. 20, reference numeral 15 denotes a roofing material having a trapezoidal concavo-convex cross-sectional shape in which a convex peak portion and a concave valley portion are repeated continuously in the width direction, and 17 is a beam made of C-type steel (ceiling beam). ). The beams support the roofing material via a tight frame. The following is a description of the eaves part. Beam 17
A tight frame base 19 as a plate for supporting a plurality of tight frames is fixed on the upper flange on the top with bolts. The tight frame base 19 constitutes an eaves support bracket (see FIG. 22) for supporting the roofing material 15 with the tight frame 18 and the face door cover 16.

The tight frame base 19 has a first flat portion 19a supported on the beam 17 and a beam 1 as shown in FIG.
7 and a second flat portion 19b protruding to the outside of the room. At both ends of the first plane portion, there are legs protruding downward,
The leg between the first flat portion and the second flat portion is loaded on the web side of the upper flange, and the side of the first flat portion opposite to the second flat portion is loaded on the end side of the upper flange. 1st plane part 19
a is a tight frame 18 having a vertical plate portion and a horizontal plate portion.
Are welded together and fastened together with the upper flange of the beam 17 with bolts.

The tight frame 18 is fixed to an upper flange of the beam 17 via a tight frame base 19. The vertical plate portion of the tight frame 18 stands upright from the lower horizontal piece,
It is housed in a recess on the underside of the roofing material. The horizontal plate portion extends along the horizontal direction above the vertical plate portion and is in close contact with the upper inner wall surface of the roofing material 15. The horizontal plate portion 18a is fitted to the upper inner wall surface of the lower surface recess of the roofing material 15. Reference numeral 18b denotes a protrusion that protrudes from the horizontal plate portion 18a and fits into the roofing material 15. The tight frame 18 includes a front door cover support portion 18c that protrudes from the middle portion in the vertical direction to the outside of the room.
Is supported. As shown in FIG. 21, the face door cover 16 has an upper shape along the uneven shape of the lower surface of the folded plate, has a substantially triangular shape with a narrow upper side and a wide lower side, It is fastened to the tight frame 18 through the intermediary. A sound insulation sheet 20 is attached to the back surface of the roofing material 15.

In the embodiment shown in FIG. 20, a heat-expandable fire-resistant member 10a is inserted or affixed to the top edge of the fire-resistant fire-resistant outer wall 1, and the heat-expandable fire-resistant member 10b is mounted on the tight frame base second flat portion 19b. Inserted or affixed. In the embodiment shown in FIG. 21 and FIG. 22, a face door cover 16 having a shape along the size of the inside ventilation hole in the uneven cross section of the roof material 15 is further attached, and the inside of the roof material 15 of the face door cover 16 is mounted. A heat-expandable refractory member 10c is affixed to a portion opposed to. A sound insulation sheet 20 is attached to the back surface of the roofing material 15.

In the embodiment shown in FIGS. 23 and 24, the face-door supporting portion 1 protruding from the intermediate portion of the tight frame 18 to the outside of the room.
8c is extended outwardly to a position above the upper edge of the fireproof outer wall 1, and the face door cover 16 is attached thereto.
A heat-expandable refractory member 10c is attached to a portion facing the inside of the roofing material 15 of FIG. A heat-expandable fire-resistant member 10a is inserted or attached to the upper-end small-edge portion of the fire-resistant outer wall 1, and the insertion and attachment of the heat-expandable fire-resistant material 10b is omitted on the tight frame base second flat portion 19b.

FIG. 25 shows an embodiment according to the eighth and ninth aspects, showing the eaves of the inclined roof 21. The eaves of the sloping roof 21 are provided so as to protrude outward from the building body, and a plurality of rafters 22 are provided inside and inclined at intervals. A field board 23 and a waterproof sheet 24 are arranged on the rafter 22, and a roof tile 25 is arranged on the top. An eaves ceiling panel 26 constituting an eaves ceiling is fixed at a fixed interval below the rafter 22 with panel mounting brackets (not shown), and a ventilation space is provided between the eaves ceiling panel 26 and the base plate 23. A ventilation space is formed.

At the tip of the rafter 22 is a long nose tip plywood 2
7 and a nose tip steel plate 28 are arranged, and further, the bent lower portion of the nose tip steel plate 28 is arranged so as to wrap the end of the eaves ceiling panel 26 with a gap. Normally, air passes through this gap to provide ventilation in the roof. A heat-expandable refractory member 10 capable of forming a fire-resistant expansion layer whose volume significantly expands in the event of a fire in a direction in which a ventilation hole formed between the eaves ceiling panel 26 and the nose tip steel plate 28 is closed is provided. Affixed or inserted to the end of the plate 28.

In FIG. 26, a stainless mesh 29 is provided in a vent formed between the eaves ceiling panel 26 and the nose tip steel plate 28 in order to prevent the heat-expandable refractory member 10 from scattering or dropping during heating. The example of arrangement is shown. A stainless mesh 29 is molded and arranged from the back side of the eaves panel 26 so as to fit into the ventilation hole between the eaves panel 26 and the nose tip steel plate 28. The heat-expandable refractory member 10 is adhered to the ventilation holes of the stainless steel mesh 29, and the stainless steel mesh 29 covers the front and rear in the ventilation direction. Normally, air is ventilated through the vents of the mesh. As an example of a stainless steel mesh body (shape dimensions 19 × 17 × 45 × 30 mm,
10 mesh, wire diameter φ0.47) is used.

[0121]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to specific embodiments, but the present invention is not limited to these embodiments.

The expansion ratio in the thickness direction and the thermal conductivity in the following examples were measured as follows. [Expansion Magnification in Thickness Direction] Using a cone calorimeter (CONE2) manufactured by ATLAS, a fire-resistant heat insulating material after expansion was produced.

Width 100 mm × length 100 mm × thickness tm
m was used as an irradiation sample.

The irradiated sample was heated and burned for 30 minutes with a cone calorie meter set to an irradiation calorie of 50 kW / m ² (corresponding to the burning conditions at the time of a medium-scale fire).
The thickness (t'mm) of the fire resistant expansion layer 20 after expansion is measured,
The expansion ratio in the thickness direction was calculated by the following equation.

If the expansion ratio in the thickness direction exceeds 20 times, the heat-expandable refractory member 10 coated with an adhesive is used.
The heat-expandable refractory member 10 has an inner dimension and a width of 1.
The measurement was carried out with the adhesive fixed to the bottom of an iron plate or aluminum foil box enclosing four sides of 00 mm x length 100 mm x height 30 mm.

Expansion ratio in the thickness direction (times) = t '/ t [Thermal conductivity] Thermal insulation thermal conductivity measuring device H manufactured by Eiko Seiki Co., Ltd.
The thermal conductivity at 25 ° C. was measured using C-073.

Example 1 The following composition was used as a refractory material A for a sheet material. Refractory material A: Metallocene PE (EG8 manufactured by Dow Chemical Company)
200) and 100 parts by weight of thermally expandable black smoke (manufactured by Tosoh Corporation)
50 parts by weight of frame cut GREP-EG) and 100 parts by weight of calcium carbonate (Whiteton BF-300 manufactured by Bihoku Powder & Chemicals).

After extruding the foamed polyethylene and extruding the refractory material A to a thickness of 1 mm so as to cover the periphery thereof, butyl rubber (butyl # 065 manufactured by Exxon) 14 is further adhered to the surface. A heat-expandable refractory member 10 as shown in FIG.

The expansion ratio of this heat-expandable refractory member 10 is 1
Twice and thermal conductivity of 0.11 kcal / m · h · ° C. (0.
46 kJ / m · h · ° C.).

The heat-expandable refractory member 10 has a foamed polyethylene serving as a buffer layer 13 at the center, a heat-expandable refractory member layer 11 having a thickness of 1 mm coated on its outer layer, and a watertight elastic layer coated on the outermost periphery. 14 as butyl rubber. As shown in the figure, the thermally expandable refractory member 10 was filled in the joint 3 between the adjacent outer wall panels 1 and 2.

Example 2 A sheet-like refractory material B having a thickness of 2.5 mm [Fire barrier manufactured by 3M Co. (expansion ratio: 3 times, thermal conductivity: 0.2)
0 kcal / m · h · ° C (0.84 kJ / m · h ·
C)))], a chloroprene-based adhesive was applied to one surface, and foamed polyethylene as the buffer layer 13 was adhered. further,
A butyl rubber (butyl # 065 manufactured by Exxon Corp.) as a watertight elastic material was attached to the surface to obtain a heat-expandable refractory member 10 having the shape shown in FIG. The heat-expandable fire-resistant member 10 has a three-layer structure in which a heat-expandable fire-resistant member layer 11, a buffer layer 13, and a watertight elastic layer 14 are laminated. The center of the obtained heat-expandable refractory member 10 was bent as shown in the figure, and was inserted and fitted so that the water-tight elastic material layer 14 was in contact with both of the cut ends 1a and 2a.

Example 3 A sheet-like refractory material C having a thickness of 2 mm [manufactured by Mitsui Kinzoku Paint Co., Ltd.]
Medici cut (expansion magnification: 4 times, thermal conductivity: 0.21k)
cal / m · h · ° C. (0.88 kJ / m · h · ° C.)]
A urethane-based adhesive is applied to one surface of the substrate to adhere a foamed polyethylene as the buffer layer 13, and then a butyl rubber (butyl # made by Exxon) as a water-tight elastic material is applied to the surface.
065) was attached to obtain a thermally expandable refractory member 10 having a three-layer structure shown in FIG. The center of the heat-expandable refractory member 10 is bent so that the water-tight elastic material layer 1
4 was inserted and fitted so that it might contact.

Example 4 40 parts by weight of an epoxy resin (bisphenol F type epoxy monomer E807 manufactured by Yuka Shell Co., Ltd.) and 6 parts of a curing agent (diamine-based curing agent EKFL052 manufactured by Yuka Shell Co., Ltd.)
0 parts by weight, 100 parts by weight of ammonium polyphosphate (Exolit 422 manufactured by Clariant), 30 parts of thermally expandable graphite (Frame Cut GREP-EG manufactured by Tosoh Corporation)
A refractory material composition D consisting of 50 parts by weight of aluminum hydroxide (Hygilite H-31 manufactured by Showa Denko KK) and 100 parts by weight of calcium carbonate (Whiteton BF-300 manufactured by Bihoku Powder & Chemicals Co., Ltd.) was rolled. After kneading, the obtained mixed composition was 20 mm wide and 0.8 m thick using a calender molding machine.
m, and a urethane-based adhesive was applied to one surface of the sheet to obtain a heat-expandable refractory member 10 shown in FIG.

The expansion ratio of the heat-expandable refractory member 10 is 8
Times, the thermal conductivity is 0.12 kcal / m · h · ° C (0.5
0 kJ / m · h · ° C.).

As shown in FIG. 18, the heat-expandable refractory member 10 was fixed to both of the cut surfaces 1a and 2a with a tucker 31 or the like.

Example 5 A mixed composition obtained by rolling and kneading a refractory material A having the same composition as in Example 1 was formed to a thickness of 1 mm, and then a urethane-based adhesive was applied thereto. A material in which the outer periphery of a polyethylene foam was covered with a ceramic blanket (fineflex blanket manufactured by Nichias) was laminated, and butyl rubber (butyl # 065 manufactured by Exxon) as a watertight elastic material was attached. The resulting heat-expandable refractory member 10 having a three-layer structure is bent at the center as shown in FIG.
The watertight elastic material layer 14 was inserted so as to be in contact therewith.

Example 6 A thermal expansion of a three-layer structure obtained in the same manner as in Example 5 except that rock wool with aluminum kraft paper (MG felt 40K manufactured by Nichias) with aluminum kraft paper was used as the buffer layer 13. The center of the refractory member 10 was bent, and as shown in FIG. 13, it was inserted and fitted so that the watertight elastic material layer 14 was in contact with both of the wood edge surfaces 1a and 2a.

Example 7 A resin composition obtained by kneading a refractory material A comprising the same composition as in Example 1 and a foamed polyethylene were co-extruded to form a foamed polyethylene in the inner layer and a refractory material in the outer layer by coextrusion. A laminate was obtained. On the other hand, the polyethylene foam obtained by the hollow extrusion was split in the back with a cutter and inserted into the hollow part. Then, an acrylate-based adhesive (Soken Chemical Co., S
K1311) was applied to obtain a heat-expandable refractory member 10 shown in FIG. The heat-expandable refractory member 10 has a configuration in which a buffer layer 13 is provided at the center and the outer layer, and a heat-expandable fire-resistant member layer 11 is laminated between the buffer layers 13. This heat-expandable refractory member 10 was applied to joints 3 of the adjacent outer wall panels 1 and 2.

Comparative Example 1 A tubular foamed polyethylene was inserted into joint portions 3 of adjacent outer wall panels 1 and 2 for construction.

Comparative Example 2 Rock wool was applied to joint portions 3 of adjacent outer wall panels 1 and 2. [Fire resistance test] 150 mm long x 1000 mm wide x 1 thickness
A 7 mm fiber-containing alumina silicate plate (manufactured by Sekisui Chemical Co., Ltd.) was used as the outer wall panels 1 and 2 and each was a C-shaped steel 1
50x50x3.2mm thickness, joint part 3 in material SS41
Was fixed with concrete screws so that the distance between them was 32.5 mm.

This was heated for one hour in accordance with JIS A1304 (fire resistance test method for building structure). The surface temperature (surface temperature of the steel pipe) at the time of heating was measured, and judgment was made based on whether the back surface temperature exceeded 260 ° C.

As a result, in each embodiment 1 corresponding to the present invention,
In each of Examples 7 to 7, gaskets were observed to fall off due to irradiation, but the heat-expandable fire-resistant member layer 20 obtained by expanding the heat-expandable fire-resistant member 10 filled the joints and was sufficiently flame-insulated. Was made. As a result, none of the rear surface temperatures reached 260 ° C.

On the other hand, in the comparative example, the back surface temperature was 360 ° C. in any case, and the reference temperature was 260 ° C.
Greatly exceeded. [Waterproofing test] When a waterproofing test was performed on the examples including the watertight elastic layer 14 and the comparative examples 1 and 2, when the examples were followed, waterproofing on the rear surface was not observed.
In each of the comparative examples, waterproofing of the back surface was observed.

Example 8 As for the fireproof joint structure between the roof and the folded roof roof eaves formed between the roof and the fireproof outer wall panel, as shown in FIG. A fireproof test specimen was prepared by inserting a roof made of folded plate into the outer wall of a tight frame for fixing it to the ceiling beam on the top floor, and covering the surrounding area with fireproof material. This is represented by a heating curve defined by ISO834,
Heating was performed for 45 minutes from the outer wall side. Backside temperature when heated without any leakage of flame to the heated backside (surface temperature of steel pipe)
Was measured, the maximum value of the ceiling beam temperature on the top floor was 351 ° C.
(Limit value 450 ° C), average 303 ° C (limit value 350)
° C) and heat insulation.

[0145]

According to the first aspect of the present invention, there is provided a heat-expandable fire-resistant layer capable of forming a fire-resistant expansion layer whose volume is significantly expanded at the time of a fire toward a butt end surface serving as a joint portion of a fire-resistant outer wall panel. Since the member is attached or inserted, it can be constructed without the need for a technique as compared with the conventional construction of injecting or applying a sealant.

According to the second aspect of the present invention, the volume expansion ratio of the heat-expandable refractory member after heating for 30 minutes under the heating condition of 50 kW / m ² is 3 times or more of the volume before heating.
Since a member having a thickness of 0 or less is selected, even if there is a gap between joints when the unit building is assembled by using a thin thermally expandable refractory member, the thermally expandable refractory member is used in a fire. The space between the joints can be reliably filled by inflating toward the wood edge.

According to the third aspect of the present invention, since the heat-expandable refractory member uses a material in which a buffer material is laminated on an inner layer or an outer layer, the buffer material becomes a buffer material, and Insertion of the refractory member becomes easy.

According to the fourth aspect of the present invention, since the water-tight elastic material is laminated on the outer layer as the heat-expandable fire-resistant member, the heat-expandable fire-resistant member is bonded or inserted to the edge of the wood. Water tightness in the part can also be achieved.

According to the fifth aspect of the present invention, since the pressure-sensitive adhesive layer is laminated on the outermost layer, it is easy to attach the heat-expandable refractory member to the wooden surface.

According to the sixth aspect of the present invention, the volume of the ventilation hole formed between the folded-plate roof and the fireproof outer wall panel is remarkably expanded at the time of fire in the direction of closing the ventilation hole. The fire-resistant connection structure is characterized in that a heat-expandable fire-resistant member capable of forming a fire-resistant expansion layer is attached or inserted. There is no penetration of the flame into the space, and the filled refractory expansion layer suppresses the propagation of heat and suppresses the temperature rise above the ceiling on the top floor. In addition, since there is a ventilation hole in normal times, ventilation in the roof can be ensured.

According to the seventh aspect of the present invention, the eaves of the folded plate roof have an upper shape along the uneven shape of the lower surface of the folded plate, and a ventilation hole is removed between the folded plate roof and the outer wall panel. Attach the face door cover to shield and cover, and make the gap formed between the folded plate roof and the face door cover a ventilation hole, make the gap between the lower surface of the folded plate roof and the upper surface of the face door cover almost constant, 7. A heat-expandable refractory member is stuck or inserted into a ventilation hole formed between a folded-plate roof and a face door cover.
Since the fireproof connection structure described above is used, there is little unevenness in the ventilation hole, and the connection portion can be more reliably filled in the event of a fire.

According to the invention as set forth in claim 8, the fire-resistant expansion resistant member is inserted or affixed to a portion of the face door cover facing the folded plate roof. Due to the structure, joints are more reliably filled in the event of a fire.

According to the ninth aspect of the present invention, the eaves ceiling is provided on the lower surface side of the inclined roof projecting outward from the skeleton of the house to the tip of the inclined roof. And a heat-expandable fire-resistant member capable of forming a fire-resistant expansion layer by remarkably expanding its volume in the event of a fire in the direction of closing the air hole in the air hole portion between the inclined roofs, and being attached or inserted. Because of the fireproof connection structure, in the event of a fire, the heat-expandable refractory member expands and fills the connection, preventing the penetration of the flame to the back, and suppressing the propagation of heat by the filled fireproof expansion layer. The temperature rise above the ceiling on the top floor can be suppressed. In addition, since there is a ventilation hole in normal times, ventilation in the roof can be ensured.

According to the tenth aspect of the present invention, there is provided a fireproof connection structure according to the ninth aspect, wherein a mesh body for preventing the heat-expandable refractory member from scattering and falling is provided in the vent hole. In the event of a fire, the thermally expandable refractory splatters,
The air hole is reliably filled and maintained without dropping.

According to the eleventh aspect, the heat-expandable refractory member has a volume expansion ratio after heating for 30 minutes under a heating condition of 50 kW / m ² of 3 to 100 times the volume before heating. The following is characterized in that:
The fireproof connection structure according to any one of the above, by using a thin heat-expandable fireproof member, in normal times to ensure ventilation in the roof with ventilation holes, in the event of fire this heat-expandable fireproof member The space between the joints can be reliably filled by expanding toward the vent hole surface.

According to the twelfth aspect of the present invention, the heat-expandable refractory member is made of a thermoplastic resin or an epoxy resin.
0 to 100 parts by weight of inorganic filler is contained,
Among them, at least a layered inorganic material that expands when heated is 20
Since the fireproof connection structure according to any one of claims 1 to 10, which is a fireproof member containing up to 350 parts by weight, a sufficient fireproof heat insulating layer and flame retardancy can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view illustrating a fireproof joint structure of an outer wall panel according to the present invention.

FIG. 2 is a cross-sectional view schematically illustrating a situation in which flame can be shielded in the fireproof joint structure of the outer wall panel of FIG.

FIG. 3 is a partial perspective view showing an example of a thermally expandable refractory member according to the present invention.

FIG. 4 is a partial perspective view showing an example of a thermally expandable refractory member according to the present invention.

FIG. 5 is a partial perspective view showing an example of a thermally expandable refractory member according to the present invention.

FIG. 6 is a partial perspective view showing an example of a thermally expandable refractory member according to the present invention.

FIG. 7 is a partial perspective view showing an example of a thermally expandable refractory member according to the present invention.

FIG. 8 is a partial perspective view showing an example of a thermally expandable refractory member according to the present invention.

FIG. 9 is a cross-sectional view schematically illustrating an example of a heat-expandable refractory member according to the present invention and a construction state thereof.

FIG. 10 is a cross-sectional view schematically illustrating an example of a heat-expandable refractory member according to the present invention and a construction state thereof.

FIG. 11 is a partial perspective view showing an example of a thermally expandable refractory member according to the present invention.

FIG. 12 is a cross-sectional view schematically illustrating an example of a heat-expandable refractory member according to the present invention and a construction state thereof.

FIG. 13 is a cross-sectional view schematically illustrating an example of a heat-expandable refractory member according to the present invention and a construction state thereof.

FIG. 14 is a sectional view illustrating a fireproof joint structure of an outer wall according to the present invention.

FIG. 15 is a cross-sectional view illustrating a fireproof joint structure of an outer wall according to the present invention.

FIG. 16 is a cross-sectional view illustrating a fireproof joint structure of an outer wall according to the present invention.

FIG. 17 is a cross-sectional view illustrating a fireproof joint structure of an outer wall according to the present invention.

FIG. 18 is a cross-sectional view schematically illustrating a construction state of the thermally expandable refractory member according to the present invention.

FIG. 19 is a cross-sectional view showing an example of the heat-expandable refractory member according to the present invention.

FIG. 20 is a sectional view showing an example of an embodiment of a ventilation hole and a fireproof connection structure formed between a folded-plate roof and a fireproof / fireproof outer wall panel attached to a top-floor building unit according to the present invention.

FIG. 21 is a cross-sectional view of an example of a fireproof connection structure between a folded-plate roof and a fireproof outer wall according to the present invention, as viewed from the eaves tip direction.

FIG. 22 is a sectional view taken along line AA of FIG. 21 according to the present invention.

FIG. 23 is a sectional view showing an example of a fireproof connection structure between a folded-plate roof and a fireproof outer wall according to the present invention, as viewed from the eaves tip direction.

24 is a sectional view taken along the line BB of FIG. 23 according to the present invention.

FIG. 25 is a cross-sectional view showing an example of a fireproof connection structure between the inclined roof and the eaves ceiling according to the present invention.

FIG. 26 is a cross-sectional view of a principal part showing a modification of FIG. 25;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer wall panel 1a Kiguchi surface 2 Outer wall panel 2a Kiguchi surface 3 Joint part 10 Thermal expansion refractory member 11 Thermal expansion refractory member layer 12 Adhesive layer 13 Buffer layer 14 Watertight elastic layer 15 Folded plate roof 16 Face door cover 21 Inclined roof 29 mesh

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazumichi Matsuda 32 Wadai, Tsukuba, Ibaraki Prefecture Sekisui Chemical Co., Ltd. Inventor Takaaki Kaneko 32, Wadai, Tsukuba, Ibaraki Prefecture Sekisui Chemical Co., Ltd. (72) Inventor Tsuyoshi Kubo 32, Wadai, Tsukuba, Ibaraki Sekisui Chemical Co., Ltd. HD01 HD02 HD11 JA06 JA22 JA29 JB07 JC09 JD08 LA12 LA16

Claims (12)

[Claims] 1. A heat-expandable fire-resistant member capable of forming a fire-expandable layer whose volume significantly expands in the event of a fire is stuck or inserted toward a wood-cut surface serving as a joint portion of a fire-resistant fire-resistant outer wall panel. To prevent fire joints. 2. The heat-expandable refractory member according to claim 1, wherein the heat-expandable refractory member is 50 kW / m ^2.
The fireproof joint structure according to claim 1, wherein the volume expansion ratio after heating for 30 minutes under the heating condition is 3 times or more and 100 times or less the volume before heating. 3. The fireproof joint structure according to claim 1, wherein said heat-expandable refractory member comprises a buffer material laminated on an inner layer or an outer layer. 4. The fireproof joint structure according to claim 1, wherein said heat-expandable refractory member has a watertight elastic material laminated on an outer layer. 5. The fireproof joint structure according to claim 1, wherein said heat-expandable refractory member has an adhesive layer laminated on an outermost layer. 6. A heat-generating layer capable of forming a fire-resistant expansion layer whose volume significantly expands in the event of a fire by directing a ventilation hole formed between a folded-plate roof and a fire-resistant outer wall panel in a direction to close the ventilation hole. A fireproof connection structure, wherein an inflatable fireproof member is attached or inserted. 7. An eaves front of a folded-plate roof is provided with a face-door cover having an upper shape along the uneven shape of the lower surface of the folded-plate, and shielding between the folded-plate roof and an outer wall panel except for a vent hole. And, the gap formed between the folded plate roof and the face door cover is a ventilation hole,
The distance between the lower surface of the folded-plate roof and the upper surface of the face-door cover is made substantially constant, and a heat-expandable refractory member is attached or inserted into the ventilation hole formed between the folded-plate roof and the face-door cover. 7. The fireproof connection structure according to claim 6, wherein: 8. A portion of the face door cover facing the folded plate roof,
The fireproof connection structure according to claim 7, wherein a heat-expandable fireproof member is inserted or attached. 9. An eaves back ceiling is provided on a lower surface side of a sloped roof provided to protrude outward from a house skeleton to a tip end of the sloped roof, and a ventilation hole between the eaves ceiling and the sloped roof is provided. A fire-resistant fire-resistant connection structure, wherein a heat-expandable fire-resistant member capable of forming a fire-resistant expansion layer whose volume significantly expands in the event of a fire is attached or inserted in a direction in which the air hole is closed. 10. The fire-resistant connection structure according to claim 9, wherein a mesh member for preventing the heat-expandable refractory member from scattering and falling is provided in the ventilation hole. 11. The heat-expandable refractory member has a power of 50 kW / m.
^The fireproof connection structure according to any one of claims 6 to 10, wherein a volume expansion ratio after heating for 30 minutes under the heating condition of ( ²⁾ is 3 times or more and 100 times or less of the volume before heating. 12. The heat-expandable refractory member according to claim 1, wherein the inorganic filler is 50 to 100 parts by weight of the thermoplastic resin or the epoxy resin.
The fireproof connection structure according to any one of claims 1 to 10, wherein the fireproof connection member comprises 400 parts by weight, of which at least 20 to 350 parts by weight of a layered inorganic substance which expands upon heating.