JP6813633B2 - Fireproof structure - Google Patents

Description

The present invention relates to a fireproof structure including a tubular sleeve installed in a gangway of a compartment.

Conventionally, piping and wiring are inserted into a tubular sleeve installed in a gangway of a building compartment. Further, Patent Document 1 discloses a technique for preventing the flame from propagating through the sleeve when a fire occurs. In Patent Document 1, bushings for protecting the wiring are provided at both ends of the sleeve. Then, by winding the wiring inserted through the sleeve and the bushing at one end of the sleeve with a heat-expandable sheet, the gap between the wiring and the sleeve is covered with the heat-expandable sheet. In the event of a fire, the thermally expandable sheet thermally expands to form an expansion insulation layer, which closes the gap between the wiring and the sleeve to prevent the flame from propagating through the sleeve. Will be done.

JP-A-2007-31599

By the way, after installing a tubular sleeve or conduit in the through passage of the compartment, the construction of the building is interrupted, or by opening only the through hole assuming the rear pipe, the sleeve or conduit is immediately installed. The sleeve may be left open for a while without the pipe or wiring being inserted. If a fire breaks out in a building in this state, the flame cannot be prevented from entering the sleeve, so that the flame may propagate through the sleeve. In this regard, Patent Document 1 winds the thermal expansion sheet around the wiring inserted through the sleeve, and therefore does not prevent the flame from propagating through the sleeve when the wiring is not inserted through the sleeve. Absent.

The present invention has been made to solve the above problems, and an object of the present invention is a fireproof structure including a tubular sleeve installed in a gangway of a compartment, through which pipes and wiring are inserted. It is to provide a fireproof structure capable of preventing the spread of fire through the sleeve in the non-existing state.

The fireproof structure of the present invention includes a compartment provided with a gangway, a tubular sleeve installed in the gangway of the compartment and used for inserting pipes and wiring, and pipes and wiring in the sleeve. A fireproof sheet that covers at least one of the openings at both ends of the sleeve in a non-inserted state is provided.

Preferably, the refractory sheet is arranged with respect to the sleeve so that the central portion of the refractory sheet covers the opening of the sleeve and the outer peripheral portion of the refractory sheet is along the side surface of the sleeve. The fireproof sheet is pressed against the sleeve by winding a metal wire around the outer peripheral portion of the fireproof sheet.

Preferably, the pair of refractory sheets having one ends bound to each other by a first metal wire are provided, one end side portions of the pair of refractory sheets cover the opening of the sleeve, and the other of the pair of refractory sheets. The pair of refractory sheets are arranged with respect to the sleeve so that the end side portions are along the side surfaces of the sleeve, and a second metal wire is wound around the other end side portion of the pair of refractory sheets. As a result, the pair of refractory sheets are pressed against the sleeve.

Preferably, a refractory sealing material is filled between the skeleton surface of the gangway and the outer peripheral surface of the sleeve.

According to the fireproof structure of the present invention, the fireproof sheet covers the opening at one end of the sleeve in a state where the pipe or wiring is not inserted through the sleeve. Therefore, before the pipe or wiring is inserted through the sleeve. Even if a fire breaks out, it is possible to prevent heat and fire from being propagated through the sleeve. Therefore, it is possible to keep the risk of fire spread low.

It is sectional drawing which shows the fireproof structure which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the fireproof structure which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the work of inserting the wiring through a sleeve in 2nd Embodiment of this invention. It is sectional drawing which shows the fireproof structure which concerns on the modification of this invention.

Hereinafter, the first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a fireproof structure 1 according to the first embodiment of the present invention.

As shown in FIG. 1, the fireproof structure 1 according to the first embodiment includes a compartment 2, a tubular sleeve 3, a fireproof sealing material 4, and a fireproof sheet 5.

The compartment 2 is a hollow wall that partitions the fire protection compartments A and B. The compartment 2 includes a pair of wall materials 6A and 6B arranged at intervals. Each of the pair of wall materials 6A and 6B is made of gypsum board and extends in the vertical direction. A pair of through holes 60A and 60B are formed in the pair of wall materials 6A and 6B. The through-passage 8 of the compartment 2 is formed by the through-holes 60A and 60B and the gap 7 between the wall materials 6A and 6B.

The sleeve 3 is installed in the gangway 8 of the compartment 2. The sleeve 3 has a tubular shape with both ends open, and is used for inserting a pipe or wiring (not shown). The piping is, for example, a water supply / drainage pipe, an intake / exhaust pipe, a water pipe, a gas pipe, and a medium transfer pipe for heating and cooling. The wiring is, for example, a CV cable, a CVD cable in which two single-core cables are bundled, a CVT cable in which three single-core cables are bundled, or another power cable or signal cable. Bushings 30 for protecting wiring and piping are provided at both ends of the sleeve 3.

As the sleeve 3, a metal or heat-expandable refractory sleeve can be used. Steel is preferred as the metal refractory sleeve, and such sleeves are known. Examples of the heat-expandable refractory sleeve include a sleeve made of a heat-expandable resin composition containing a resin as a binder or a matrix, a heat-expandable graphite, and an inorganic filler, which can be used to form the sleeve 3. Commercially available refractory sheets include, for example, a heat-expandable resin composition containing Fiblock (registered trademark. Epoxy resin or butyl rubber as a resin component and a phosphorus compound, heat-expandable graphite, inorganic filler, etc.) manufactured by Sekisui Chemical Co., Ltd. Sheet-shaped molded product), Sumitomo 3M's refractory (sheet material consisting of a resin composition containing chloroprene rubber and verculite, expansion coefficient: 3 times, thermal conductivity: 0.20 kcal / m · h · ° C) , Mitsui Metal Paint Chemical Co., Ltd.'s Medihicut (sheet material consisting of resin composition containing polyurethane resin and thermosetting graphite, expansion coefficient: 4 times, thermal conductivity: 0.21 kcal / m · h · ° C), etc. Be done.

The fire-resistant sealing material 4 is filled between the skeleton surface of the gangway 8 (the skeleton surface of the through holes 60A and 60B) and the outer peripheral surface of the sleeve 3. The sealing material 4 contains fiblock (registered trademark. Resin component such as epoxy resin and rubber resin, heat expansion component such as heat expandable graphite, phosphorus compound, inorganic filler and the like, etc., manufactured by Sekisui Chemical Co., Ltd. A molded body of a resin composition) or a fire-resistant putty can be used. Examples of the fire-resistant putty include clay-like fillers containing organic binders such as polybutene and polybutadiene and inorganic fillers such as gypsum, aluminum hydroxide, and magnesium hydroxide, paste-like fillers, and heat-expandable. Examples thereof include a clay-like filler or a paste-like filler made of a fire-resistant resin composition. Among them, gypsum, aluminum hydroxide, magnesium hydroxide and the like exhibit a heat absorbing action when exposed to heat such as a fire, and can prevent the sleeve 3 from becoming hot. Therefore, gypsum, aluminum hydroxide, and hydroxide It is preferable to use a clay-like filler containing magnesium or the like or a paste-like filler. Further, when a refractory sleeve is used as the sleeve 3, it is possible to prevent the refractory putty from dripping onto the floor between the wall materials 6A and 6B in the event of a fire. Further, a clay-like filler or a paste-like filler made of a heat-expandable fire-resistant resin composition is preferable because it expands when exposed to heat such as a fire and exhibits a heat insulating effect.

The fireproof sheet 5 covers one opening of the sleeve 3 (the opening on the fireproof compartment B side of the sleeve 3) in a state where no pipe or wiring is inserted through the sleeve 3. The refractory sheet 5 is arranged with respect to the sleeve 3 so that the central portion 5a covers the opening of the sleeve 3 and the outer peripheral portion 5b is along the side surface of the sleeve 3. Then, the metal wire 9 is wound around the outer peripheral portion 5b of the refractory sheet 5, so that the refractory sheet 5 is pressed against the sleeve 3.

The fire-resistant sheet 5 is formed of a heat-expanding material having fire resistance. Examples of the thermosetting material include a thermosetting resin composition containing a thermoplastic resin as a binder or a matrix, a rubber substance, or a synthetic resin such as a thermosetting resin, a thermosetting graphite, and an inorganic filler.

Examples of the thermoplastic resin include polyolefin resins such as polypropylene resins, polyethylene resins, polybutene resins, and polypentene resins, polystyrene resins, acrylonitrile-butadiene-styrene resins, polycarbonate resins, and polyphenylene ether resins. Examples thereof include acrylic resins, polyamide resins, and polyvinyl chloride resins.

Examples of the rubber substance include natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), 1,2-polybutadiene rubber (1,2-BR), styrene-butadiene rubber (SBR), and chloroprene rubber ( CR), nitrile rubber (NBR), butyl rubber (IIR), ethylene-propylene rubber (EPR, EPDM), chlorosulfonated polyethylene (CSM), acrylic rubber (ACM, ANM), epichlorohydrin rubber (CO, ECO), polysulfide Examples thereof include rubber (T), silicone rubber (Q), fluororubber (FKM, FZ), and urethane rubber (U).

Examples of the thermosetting resin include polyurethane, polyisocyanurate, polyisocyanurate, phenol resin, epoxy resin, urea resin, melamine resin, unsaturated polyester resin, and polyimide.

These resins may be used alone or in combination of two or more. Among these resins, polyolefin-based resins or rubber substances are preferable, and polyethylene-based resins are particularly preferable, from the viewpoint that molding is possible at the expansion temperature or lower when the heat-expandable graphite described later is blended. Further, a rubber substance is preferable from the viewpoint that a large amount of filler can be blended in order to further improve the fire prevention performance. Further, from the viewpoint of increasing the flame retardancy of the resin itself and improving the fire prevention performance, a phenol resin and an epoxy resin are preferable. In particular, an epoxy resin is preferable because the selection of the molecular structure is wide and the fireproof performance and mechanical properties of the resin composition can be easily adjusted.

Expandable graphite is a conventionally known substance, and powders such as natural scaly graphite, thermally decomposed graphite, and kiss graphite are mixed with inorganic acids such as concentrated nitric acid, nitric acid, and selenic acid, and concentrated nitric acid, perchloric acid, and perchlorate. , Permanganate, selenic acid, hydrogen peroxide and other strong oxidizing agents to form graphite interlayer compounds, which are crystalline compounds that maintain the layered structure of carbon. As the heat-expandable graphite obtained by the acid treatment in this manner, it is preferable to use one neutralized with ammonia, an aliphatic lower amine, an alkali metal compound, an alkaline earth metal compound or the like.

The particle size of the 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 and a sufficient expansion heat insulating 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 large, but it is blended with the resin. In some cases, the dispersibility deteriorates, and deterioration of physical properties is inevitable. Examples of commercially available products of heat-expandable graphite include "GREP-EG" manufactured by Tosoh Corporation and "GRAFGUARD" manufactured by GRAFTECH.

It is preferable to further add an inorganic filler to the heat-expandable resin composition.

When the expanded heat insulating layer is formed, the inorganic filler increases the heat capacity and suppresses heat transfer, and also acts as an aggregate to improve the strength of the expanded heat insulating layer. The inorganic filler is not particularly limited, and 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. , Hydrous inorganic substances such as aluminum hydroxide and hydrotalcite; metal carbonates such as basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, strontium carbonate and barium carbonate can be mentioned.

In addition to these, as inorganic fillers, calcium salts such as calcium sulfate, gypsum fiber, and calcium silicate; silica, diatomaceous earth, dosonite, barium sulfate, talc, clay, mica, montmorillonite, bentonite, active white clay, and 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 " Examples thereof include "MOS" (trade name), lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless fiber, zinc borate, various magnetic powders, slag fiber, fly ash, and dehydrated sludge. These inorganic fillers may be used alone or in combination of two or more.

The particle size of the inorganic filler is preferably 0.5 to 100 μm, more preferably 1 to 50 μm. When the amount of the inorganic filler added is small, the dispersibility greatly affects the performance, so that the inorganic filler has a small particle size, but if it is less than 0.5 μm, secondary aggregation occurs and the dispersibility deteriorates. When the amount added is large, the viscosity of the resin composition increases and the moldability decreases as the high filling progresses, but the viscosity of the resin composition can be decreased by increasing the particle size. Those with a large diameter are preferable. If the particle size exceeds 100 μm, the surface properties of the molded product and the mechanical properties of the resin composition deteriorate.

Examples of the inorganic filler include "Heidilite H-31" (manufactured by Showa Denko) with a particle size of 18 μm for aluminum hydroxide, "B325" (manufactured by ALCOA) with a particle size of 25 μm, and calcium carbonate. Examples thereof include 1.8 μm “Whiten SB Red” (manufactured by Bikita Powder Industry Co., Ltd.) and “BF300” (manufactured by Bikita Powder Industry Co., Ltd.) having a particle size of 8 μm.

In the heat-expandable resin composition, in order to increase the strength of the expansion heat insulating layer and improve the fire protection performance, a phosphorus compound may be further added in addition to the above-mentioned components. The phosphorus compound is not particularly limited, and for example, various phosphate esters such as red phosphorus; triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresil diphenyl phosphate, xylenyl diphenyl phosphate; sodium phosphate, Metal phosphates such as potassium phosphate and magnesium phosphate; ammonium polyphosphates; compounds represented by the following chemical formula (1) can be mentioned. Of these, red phosphorus, ammonium polyphosphate, and the compound represented by the following chemical formula (1) are preferable from the viewpoint of fire prevention performance, and ammonium polyphosphate is more preferable from the viewpoint of performance, safety, cost, and the like. ..

In the chemical formula (1), R1 and R3 represent hydrogen, a linear or branched alkyl group having 1 to 16 carbon atoms, or an aryl group having 6 to 16 carbon atoms. R2 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 a carbon number of carbon atoms. Represents 6 to 16 aryloxy groups.

As the red phosphorus, commercially available red phosphorus can be used, but from the viewpoint of moisture resistance and safety such as not spontaneously igniting during kneading, those in which the surface of the red phosphorus particles is coated with a resin are preferably used. The ammonium polyphosphates are not particularly limited, and examples thereof include ammonium polyphosphate and melamine-modified ammonium polyphosphate. Ammonium polyphosphate is preferably used from the viewpoint of handleability and the like. Examples of commercially available products include "AP422" and "AP462" manufactured by Clariant AG, and "FR" manufactured by Budenheim Iverica.
"CROS 484", "FR CROS 487" and the like can be mentioned.

The compound represented by the chemical formula (1) is not particularly limited, and for example, methylphosphonate, dimethyl methylphosphonate, diethylmethylphosphonate, ethylphosphonate, propylphosphonate, butylphosphonic acid, 2-methylpropylphosphonate, t- Butylphosphonic acid, 2,3-dimethyl-butylphosphonate, octylphosphonic acid, phenylphosphonic acid, dioctylphenylphosphonate, dimethylphosphonate, methylethylphosphonate, methylpropylphosphinic acid, diethylphosphonate, dioctylphosphonate, phenylphosphin Acids, diethylphenylphosphonates, diphenylphosphonates, bis (4-methoxyphenyl) phosphonates and the like can be mentioned. Among them, t-butylphosphonic acid is preferable in terms of high flame retardancy, although it is expensive. The phosphorus compounds may be used alone or in combination of two or more.

Further, the resin composition includes antioxidants such as phenol-based, amine-based and sulfur-based, antistatic agents, antistatic agents, stabilizers, cross-linking agents, lubricants and softeners as long as the physical properties are not impaired. , Pigments and the like may be added. Further, a general flame retardant may be added, and the fire prevention performance can be improved by the combustion suppressing effect of the flame retardant.

In the resin composition constituting the heat-expandable refractory material, the blending amount of the heat-expandable graphite is preferably 10 to 300 parts by weight with respect to 100 parts by weight of the resin component. When the blending amount is 10 parts by weight or more, the volume expansion coefficient is large and the part where the synthetic resin member constituting the resin sash is burnt down can be sufficiently filled, and the fire prevention performance is exhibited. Target strength is maintained. The blending amount of the heat-expandable graphite is more preferably 20 to 250 parts by weight.

In the resin composition, the blending amount of the inorganic filler is preferably 10 to 400 parts by weight with respect to 100 parts by weight of the resin component. When the blending amount is 10 parts by weight or more, sufficient fire protection performance is obtained, and when it is 400 parts by weight or less, the mechanical strength is maintained. The blending amount of the inorganic filler is more preferably 40 to 350 parts by weight.

When the phosphorus compound is added in the resin composition, the blending amount of the phosphorus compound is 30 to 300 parts by weight with respect to 100 parts by weight of the resin component. When the blending amount is 30 parts by weight or more, the effect of improving the strength of the expanded heat insulating layer is sufficient, and when it is 300 parts by weight or less, the mechanical strength is maintained. The blending amount of the phosphorus compound is more preferably 40 to 250 parts by weight.

As a commercially available sheet that can be used as the refractory sheet 5, for example, Sekisui Chemical Co., Ltd. Fiblock (registered trademark. Epoxy resin or butyl rubber is used as a resin component, and heat containing a phosphorus compound, a heat-expandable graphite, an inorganic filler, etc. (Sheet-shaped molded product of expandable resin composition), Fire Barrier of Sumitomo 3M Co., Ltd. (Sheet material composed of resin composition containing chloroprene rubber and varcurite, expansion rate: 3 times, thermal conductivity: 0.20 kcal / m ・ h ・ ° C), Mijihikat (sheet material consisting of resin composition containing polyurethane resin and heat-expandable graphite, expansion rate: 4 times, thermal conductivity: 0.21 kcal / m ・ h)・ ℃) and so on.

According to the fireproof structure 1 of the first embodiment, since the fireproof sheet 5 covers the opening at one end of the sleeve 3 in a state where the pipes and wirings are not inserted through the sleeve 3, the pipes and wirings are connected to the sleeve 3. Even if a fire breaks out before the pipe is inserted, it is possible to prevent heat and disaster from propagating through the sleeve 3. Therefore, it is possible to prevent the spread of fire through the sleeve 3.

Specifically, when a fire breaks out on the side of the fireproof compartment B where the fireproof sheet 5 is arranged, the fireproof sheet 5 blocks the flame, so that heat and flame do not enter the sleeve 3 and the fireproof compartment B Heat, flame, and smoke are prevented from entering the fireproof compartment A through the sleeve 3. Therefore, it is possible to prevent the spread of fire through the sleeve 3.

Further, if a fire breaks out on the fireproof compartment A side where the fireproof sheet 5 is not arranged, the temperature and pressure in the room due to the fire will rise, and heat and flame will propagate to the fireproof compartment B through the sleeve 3. And. However, since the fireproof sheet 5 is attached to the fireproof compartment B side of the sleeve 3, the opening of the sleeve 3 on the fireproof compartment B side is closed, so that the inside of the sleeve 3 becomes oxygen deficient. Moreover, the supply of heat is suppressed. Therefore, it is possible to prevent the spread of fire through the sleeve 3.

Further, when the refractory sheet 5 is formed of a heat-expanding material, the fire-resistant sheet 5 thermally expands to form an expansion heat insulating layer, and the expansion heat insulating layer closes the opening of the sleeve 3. It is possible to prevent heat and flame from propagating in the sleeve 3.

Further, by winding the metal wire 9 around the outer peripheral portion 5b of the refractory sheet 5 along the side surface of the sleeve 3, the refractory sheet 5 can be easily sleeved even when the diameter of the sleeve 3 is small. Can be attached to 3.

Next, the second embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a cross-sectional view showing the fireproof structure 10 according to the second embodiment.

The refractory structure 10 according to the second embodiment includes a compartment 2, a tubular sleeve 3, a refractory sealing material 4, and a pair of refractory sheets 5A and 5B. The compartment 2, the sleeve 3, and the fire-resistant sealing material 4 are the same as those in the first embodiment. Therefore, the description thereof will be omitted.

The pair of fireproof sheets 5A and 5B cover one opening of the sleeve 3 (the opening on the fireproof compartment B side of the sleeve 3) in a state where wiring and piping are not inserted through the sleeve 3 as shown in FIG. is there.

In a state where no wiring or piping is inserted through the sleeve 3 (in the state of FIG. 2), the ends 5c and 5c of the refractory sheets 5A and 5B are bound by a metal wire 11. Then, one end side portions 5d and 5d of the fire resistant sheets 5A and 5B cover the opening of the sleeve 3, and the other end side portions 5e and 5e of the fire resistant sheets 5A and 5B are fire resistant so as to be along the outer peripheral surface of the sleeve 3. The sheets 5A and 5B are arranged with respect to the sleeve 3. Further, the metal wire 12 is wound around the other end side portions 5e and 5e of the refractory sheets 5A and 5B, so that the refractory sheets 5A and 5B are pressed against the sleeve 3.

In the state where the wiring or the like is not inserted through the sleeve 3 described above (in the state of FIG. 2), the fireproof sheets 5A and 5B cover one opening of the sleeve 3 (the opening on the fireproof section B side of the sleeve 3). .. Therefore, even if a fire occurs before the pipe or wiring is inserted through the sleeve 3, it is possible to prevent heat or fire from being propagated through the sleeve 3. Therefore, it is possible to prevent the spread of fire through the sleeve 3.

FIG. 3 shows the work of inserting the wiring 12 through the sleeve 3. When the wiring 12 is inserted through the sleeve 3, the following operations (i) to (iv) are sequentially performed.
(I) By removing the metal wire 11 from the refractory sheets 5A and 5B, one ends of the refractory sheets 5A and 5B are released from binding to each other (FIG. 3 (a)).
(Ii) The wiring 12 is inserted into the sleeve 3, and the wiring 12 is passed between the ends 5c and 5c of the refractory sheets 5A and 5B (FIG. 3B).
(Iii) One ends 5c and 5c of the refractory sheets 5A and 5B are placed along the wiring 12 (FIG. 3 (c)).
).
(Iv) The metal wire 11 is wound around one ends 5c and 5c of the refractory sheets 5A and 5B (FIG. 3 (c)).

After the wiring 12 is inserted into the sleeve 3 by the above operations (i) to (iv) and the state shown in FIG. 3C is reached, the tonic sheets 5A and 5B are replaced with the wiring 12 and the sleeve. It covers the gap between 3 and 3. Therefore, when a fire occurs, it is possible to prevent heat and disaster from propagating from between the wiring 12 and the sleeve 3. Therefore, it is possible to prevent the spread of fire through the sleeve 3. When the pipe is inserted into the sleeve 3, the same operations as in (i) to (iv) above are performed.

According to the second embodiment, by performing the simple operations (i) to (iv) above, it is possible to realize a measure for suppressing the risk of fire spread immediately after inserting the wiring or the pipe into the sleeve 3. Therefore, it is highly convenient. Further, even if a fire occurs at any time before and after inserting the wiring or the like into the sleeve 3, it is possible to prevent the spread of fire through the sleeve 3.

The present invention is not limited to the above-described embodiment, and various modifications can be made.

For example, in the first and second embodiments, the opening of the sleeve 3 on the fireproof compartment B side is covered with the refractory sheets 5, 5A and 5B, but the opening of the sleeve 3 on the fireproof compartment B side is the fireproof sheet. It may be covered with 5,5A, 5B, and both of the openings at both ends of the sleeve 3 may be covered with the refractory sheets 5,5A, 5B. If only one of the openings at both ends of the sleeve 3 is covered with the refractory sheets 5, 5A, 5B, the construction on the other side where the refractory sheets 5, 5A, 5B are not arranged may be performed. The refractory sheets 5, 5A and 5B do not interfere. Therefore, the construction on the other side can be smoothly performed.

Further, the surfaces of the metal wires 9, 11 and 12 used in the first and second embodiments may be covered with a covering material to prevent rust and the like.

Further, in the first and second embodiments, an example in which the compartment is a hollow wall made of gypsum board is shown, but the compartment may be a lightweight cellular concrete (ALC) wall, a wall faithfully formed of mortar, or the like. It may be any other wall, and is not limited to a wall extending in the vertical direction, and may be a floor or board extending in the horizontal direction.

FIG. 4 is a cross-sectional view showing a modified example in which the compartment 2 is a floor extending in the horizontal direction. FIG. 4A shows a modified example of the fireproof structure 1 of the first embodiment, and FIG. 4B shows a modified example of the fireproof structure 10 of the second embodiment. In the modified examples shown in FIGS. 4 (a) and 4 (b), the upper layer section C and the lower layer section D are partitioned by the section body 2. A through-passage 8 extending in the vertical direction is formed in the compartment 2. A sleeve 3 is installed in the gangway 8, and a fireproof sealing material 4 is filled between the skeleton surface of the gangway 8 and the outer peripheral surface of the sleeve 3. In the modified example of FIG. 4A, the opening at the upper end of the sleeve 3 is covered with the refractory sheet 5 in a state where no pipe or wiring is inserted through the sleeve 3. Further, in the modified example of FIG. 4B, the opening at the upper end of the sleeve 3 is covered with a pair of refractory sheets 5A and 5B in a state where no pipe or wiring is inserted through the sleeve 3. According to the modified examples shown in FIGS. 4 (a) and 4 (b) above, since the opening at the upper end of the sleeve 3 is covered by the fire resistant sheet 5 and the fire resistant sheets 5A and 5B, the sleeve 3 is piped. Even if a fire occurs in either of the compartments C and D before the wiring is inserted, it is possible to prevent the heat and fire from being propagated to the other of the compartments C and D through the sleeve 3. Therefore, it is possible to prevent the spread of fire through the sleeve 3. In the modified examples of FIGS. 4A and 4B, the opening at the lower end of the sleeve 3 may be covered with the refractory sheets 5, 5A and 5B, and both the upper end and the lower end of the sleeve 3 may be covered. The openings may be covered with refractory sheets 5, 5A, 5B.

1,10 Fireproof structure 2 Section 3 Sleeve 4 Fireproof sealant 5,5A, 5B Fireproof sheet 5a Central part of fireproof sheet 5b Outer part of fireproof sheet 5c One end of fireproof sheet 5d One end side of fireproof sheet Part 5e The other end of the refractory sheet 8 Throughpass 9, 11, 12 Metal wire

Claims (4)

It is a fireproof construction method for the gangway of the compartment.
The sleeve is installed in the gangway of the compartment so that at least one end side of the tubular sleeve extends from the compartment, and a refractory sheet is provided on the outer surface of the tubular sleeve at least one end side of the sleeve. installed so as to be in contact, said by refractory sheet, refractory construction method of the through passage of the partition member having a step, you at least a state where one end opening is closed within the opening of both ends of the sleeve. A step of opening the opening of the sleeve blocked by the refractory sheet, and
Refractory construction method of the through passage of the partition member according to claim 1, characterized in that and a step of inserting a pipe or wire in the sleeve. The fireproof construction method for a gangway through a compartment according to claim 1 or 2 , wherein a step of filling a fire resistant sealing material between the skeleton surface of the gangway and the outer peripheral surface of the sleeve is provided. A tubular sleeve installed in the gangway of the compartment so that at least one end extends from the compartment .
A refractory sheet installed so as to be in contact with the outer surface of the sleeve is provided on at least one end side of the sleeve extending from the compartment .
A sleeve with a sheet, which is configured to close at least one of the openings at both ends of the sleeve by the refractory sheet.

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