JP2016185202A - Fireproofing device and building fireproof structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide: a fireproofing device capable of avoiding falling off a through hole of a partition even when a vibration or impact is applied thereon from an outside, and a building fireproof structure using the fireproofing device.SOLUTION: A fireproofing device 1 is disposed in a through hole 12 formed in a partition 11 of a building and having at least one tubular body 13 inserted therein, and is used for fireproofing of the through hole 12. The fireproofing device 1 comprises: a cylindrical body part 2 which has a thermal expansion property and is inserted in the through hole 12 and in which the at least one tubular body 13 is inserted; a first locking part 3 exposed from the through hole 12 and hooked on one outer surface of the partition 11; and a second locking part 4 exposed from the through hole 12 and hooked on the other outer surface of the partition 11.SELECTED DRAWING: Figure 1

Description

  The present invention leaks fire and heat in the event of a fire from a gap between a through-hole formed in a partition such as a wall, floor, or ceiling of a building and a pipe such as a pipe or cable inserted through the through-hole. The present invention relates to a fire protection device for preventing fire and a fire prevention structure of a building.

  As this type of fire protection device, one formed of a thermally expanded material in a bottomed cylindrical shape is known (see, for example, Patent Document 1). The fire protection device described in Patent Document 1 is configured such that a cylindrical main body portion is inserted through a through hole of a partition body in a state where the tube body is inserted, and a bottom portion is formed so as to be able to pass through the tube body. Holding the body. In the fire protection device described in Patent Document 1, when a fire occurs, the fire protection device thermally expands due to heat at the time of the fire, fills the gap between the through hole and the tube body, and melts or burns out the space formed by the tube body. Since it fills and closes a through hole, it can prevent that a flame and heat leak from a through hole.

JP 2014-5911 A

  This type of fire protection device is installed by fitting a cylindrical main body portion into a through hole of a partition body. On the other hand, the through holes of the partition are not necessarily all the same, but are different in size, total length, and the like. Therefore, when installing the fire protection device in the through hole of the compartment, it is necessary to select a fire protection device according to the size and overall length of the through hole, but select a fire protection device that does not match the size and overall length of the through hole. If installed in the through hole of the partition, there is a risk that sufficient fire prevention measures cannot be taken for the through hole of the partition.

  The present invention has been made by paying attention to the above-described problems, and uses a fire protection device that can be installed to express sufficient fire protection performance even for through holes of various sizes and full lengths, and the fire protection device. It aims at providing the fire prevention structure of a building.

  The above-mentioned object of the present invention is a fire protection device that is installed in a through hole formed in a partition of a building and through which at least one pipe body is inserted, and is used for fire prevention of the through hole. A hollow body that is inserted through the through-hole and has a circular cross section perpendicular to the axial direction, and the main body is formed in a tapered shape that tapers from one end to the other end in the axial direction. Achieved by fire protection equipment.

  In the fire protection device having the above configuration, it is preferable that a plurality of cuts are provided along the axial direction on the outer peripheral surface of the main body.

  In the fire protection device having the above-described configuration, it is preferable that the main body portion is deformable.

  In the fire protection device having the above-described configuration, it is preferable that the fire protection device further includes one helical or plural ring-shaped fastening members wound around the main body.

  The above object of the present invention is also provided by a fire prevention structure for a building in which a fire protection device having the above structure is used in a through hole formed in a partition of a building and through which at least one pipe is inserted. Achieved.

  According to the present invention, sufficient fire prevention performance can be exhibited even for through holes of various sizes and full lengths.

It is sectional drawing which shows schematic structure of the fire prevention structure which concerns on one Embodiment of this invention. It is the perspective view seen from the front side of the fire protection device of FIG. It is a top view of a thermal expansion sheet. It is sectional drawing which shows the process of installing a fire prevention tool in the through-hole of a division body. It is sectional drawing which shows the process of installing a fire prevention tool in the through-hole of a division body. It is sectional drawing which shows the process of installing a fire prevention tool in the through-hole of a division body.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The fire protection device of the present invention is installed in a through hole formed in a partition such as a wall, floor, or ceiling of a building, such as an inner peripheral surface of the through hole, and a pipe or a cable inserted through the through hole. This is to prevent fire and heat from leaking in the event of a fire from the gap with the piping (pipe).

  FIG. 1 shows a fire prevention structure 10 in a through-hole 12 of a building partition 11 using a fire protection device 1 according to an embodiment of the present invention. The partition body 11 plays a role of partitioning adjacent fire protection sections A and B such as a room. In addition, in this embodiment, although the fire prevention structure 10 which installed the fire prevention tool 1 in the wall which partitions off the adjacent fire prevention divisions A and B vertically as an example is demonstrated as the division body 11, the scope of the present invention is It is needless to say that the present invention is not limited to this embodiment, and a fire prevention structure in which the fire prevention equipment 1 is installed on a ceiling, a floor or the like that horizontally partitions adjacent fire prevention sections is also included in the scope of the present invention.

  The structure of the wall as the partition 11 is not particularly limited. For example, in addition to the reinforced concrete structure (RC) and the lightweight cellular concrete structure (ALC), although not shown, a wooden or steel stud is inserted. Thus, partition walls (hollow walls) with gypsum boards fixed on both sides can be mentioned. A through hole 12 is formed in the partition body 11, and the adjacent fire prevention sections A and B communicate with each other through the through hole 12. When the wall is a partition wall (hollow wall), a through hole 12 is formed in each gypsum board. The shape of the through-hole 12 is circular in a sectional view in the illustrated example, but may be various shapes such as a rectangular shape in a sectional view. At least one tube 13 is inserted through the through-hole 12. The pipe body 13 is various pipes (for example, water pipes, water supply pipes, drain pipes, refrigerant pipes, etc.) and cables (for example, electric wires, optical fiber cables, etc.), and one pipe is inserted in the illustrated example.

  As shown in FIG. 2, the fire protection device 1 of the present embodiment has a thermal expansion property and fire resistance, and is a hollow main body having a circular cross section perpendicular to the axial direction that is inserted into the through hole 12 of the partition body 11. A part 2 and a fastening member 3 wound around the main body part 2 are provided.

  In the present embodiment, the main body 2 is formed in a substantially cylindrical shape (hollow frustoconical shape) opened at both ends, and has an insertion hole 20 into which at least one tubular body 13 can be inserted. Yes. The length (the size in the axial direction) of the main body 2 is based on the general total length of the through-hole 12 provided in the partition 11 (that is, the general thickness of the partition 11, for example, about 600 mm to 200 mm). Is also set larger.

  The main body 2 is formed in a tapered shape that gradually tapers from one end in the axial direction toward the other end (that is, the outer diameter is reduced). The outer shape (that is, the outer diameter) of the one end portion of the main body 2 that is spread out is set to be larger than the general outer shape (for example, a diameter, for example, about 50 mm to 200 mm) of the through hole 12. When the main body 2 is inserted into the through hole 12 from the end side, the one end side is exposed from the through hole 12 and is caught on the outer surface of the partitioning body 11. The outer shape (that is, the outer diameter) of the tapered other end of the main body 2 is set to be considerably smaller than the general outer shape of the through hole 12.

  The thickness of the main body 2 is not particularly limited as long as it has a dimension that can at least close the through-hole 12 when thermally expanded by heat during a fire. However, if the thickness of the main body 2 is large, the fire prevention performance is improved, but it becomes difficult to insert the tube 13, and the cost increases. Is determined by this trade-off. In addition, the thickness of the main-body part 2 is constant in the axial direction so that the internal insertion hole 20 is gradually reduced in diameter in the axial direction (the insertion hole 20 has a truncated cone shape) as in the illustrated example.

The main body 2 is made of a thermal expansion material. The thermal expansion material is not particularly limited as long as it is a material that expands by heating, but a material having a volume expansion coefficient of 3 to 40 times after heating for 30 minutes under a heating condition of 50 kW / m ² is preferably used. it can. Examples of such a heat-expandable material include those containing a heat-expandable graphite and an inorganic filler in addition to a resin such as a thermoplastic resin, a rubber substance, and a thermosetting resin as a binder or a matrix.

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

  Examples of rubber materials include natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), 1,2-polybutadiene rubber (1,2-BR), styrene-butadiene rubber (SBR), 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), polyvulcanized Examples thereof include rubber (T), silicone rubber (Q), fluoro rubber (FKM, FZ), and urethane rubber (U).

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

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

  Thermally expandable graphite is a conventionally 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, perchloric acid and perchloric acid. This is a crystalline compound in which a graphite intercalation compound is formed by treatment with a strong oxidant such as salt, permanganate, dichromate, hydrogen peroxide, etc., and maintains a layered structure of carbon. It is preferable to use the heat-expandable graphite obtained by the acid treatment as described above, further neutralized with ammonia, an aliphatic lower amine, an alkali metal compound, an alkaline earth metal compound, or the like.

  The particle size of the thermally expandable graphite is preferably 20 mesh to 200 mesh. When the particle size is smaller than 200 mesh, the thermal expansion degree of graphite is small, and a sufficient expansion heat insulation layer cannot be obtained. When the particle size is larger than 20 mesh, there is an advantage that the expansion degree of graphite is large. In doing so, the dispersibility becomes worse, and the deterioration of physical properties is inevitable. Examples of commercially available products of thermally expandable graphite include “GREP-EG” manufactured by Tosoh Corporation, “GRAFGUARD” manufactured by GRAFTECH, and the like.

  The inorganic filler increases the heat capacity and suppresses heat transfer when the fireproof material 3 is thermally expanded, and improves the strength of the thermally expanded fireproof material 3 by acting as an aggregate. The inorganic filler is not particularly limited, and examples thereof include metal oxides such as alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, and ferrites; calcium hydroxide and magnesium hydroxide. And water-containing 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.

  In addition to these, inorganic fillers include calcium salts such as calcium sulfate, gypsum fiber, calcium silicate; silica, diatomaceous earth, dosonite, barium sulfate, talc, clay, mica, montmorillonite, bentonite, activated clay, sepiolite. , Imogolite, sericite, glass fiber, glass beads, silica balun, aluminum nitride, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, carbon balun, charcoal powder, various metal powders, potassium titanate, magnesium sulfate MOS ”(trade name), lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powders, slag fiber, fly ash, dehydrated sludge and the like. These inorganic fillers may be used alone or in combination of two or more.

  As a particle size of an inorganic filler, 0.5 micrometer-100 micrometers are preferable, More preferably, they are 1 micrometer-50 micrometers. When the addition amount of the inorganic filler is small, the dispersibility largely affects the performance, so that the particle size is preferably small. However, when it is less than 0.5 μm, secondary aggregation occurs and the dispersibility deteriorates. When the addition amount is large, the viscosity of the resin composition increases and moldability decreases as the high filling progresses, but the viscosity of the resin composition can be decreased by increasing the particle size. A thing with a large diameter is preferable. When the particle size exceeds 100 μm, the surface properties of the molded body and the mechanical properties of the resin composition are lowered.

  As the inorganic filler, for example, for aluminum hydroxide, “Hijilite H-31” (manufactured by Showa Denko) having a particle size of 18 μm, “B325” (manufactured by ALCOA) having a particle size of 25 μm, and calcium carbonate, Examples include 1.8 μm “Whiteon SB Red” (manufactured by Bihoku Powdered Industries Co., Ltd.) and “BF300” (manufactured by Bihoku Powdered Industries Co., Ltd.) having a particle size of 8 μm.

  In addition to the above-described components, a phosphorus compound may be further added to the thermal expansion material in order to increase the strength of the main body 2 after thermal expansion and improve the fireproof performance. The phosphorus compound is not particularly limited. For example, red phosphorus; various phosphate esters such as triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, xylenyl diphenyl phosphate; sodium phosphate, Examples thereof include metal phosphates such as potassium phosphate and magnesium phosphate; ammonium polyphosphates; compounds represented by the following chemical formula (1), and the like. Among these, from the viewpoint of fire prevention performance, red phosphorus, ammonium polyphosphates, and compounds represented by the following chemical formula (1) are preferable, and ammonium polyphosphates are more preferable in terms of performance, safety, cost, and the like. .

  In 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 Represents 6 to 16 aryloxy groups.

  As red phosphorus, commercially available red phosphorus can be used, but from the viewpoint of safety such as moisture resistance and not spontaneous ignition during kneading, a material in which the surface of red phosphorus particles is coated with a resin is 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. Examples of commercially available products include “AP422” and “AP462” manufactured by Clariant, “FR CROS 484” and “FR CROS 487” manufactured by Budenheim Iberica.

  The compound represented by the chemical formula (1) is not particularly limited. For example, methylphosphonic acid, dimethyl methylphosphonate, diethyl methylphosphonate, ethylphosphonic acid, propylphosphonic acid, butylphosphonic acid, 2-methylpropylphosphonic acid, t -Butylphosphonic acid, 2,3-dimethyl-butylphosphonic acid, octylphosphonic acid, phenylphosphonic acid, dioctylphenylphosphonate, dimethylphosphinic acid, methylethylphosphinic acid, methylpropylphosphinic acid, diethylphosphinic acid, dioctylphosphinic acid, phenyl Examples include phosphinic acid, diethylphenylphosphinic acid, diphenylphosphinic acid, and bis (4-methoxyphenyl) phosphinic acid. Among them, t-butylphosphonic acid is preferable in terms of high flame retardancy although it is expensive. A phosphorus compound may be used independently or may use 2 or more types together.

  In addition, for the thermally expandable materials, phenolic, amine-based, sulfur-based antioxidants, metal damage inhibitors, antistatic agents, stabilizers, cross-linking agents, lubricants, softeners, as long as the physical properties are not impaired. A pigment or the like may be added. Moreover, a general flame retardant may be added and fire prevention performance can be improved by the combustion suppression effect by a flame retardant.

  In the thermally expandable material, the amount of thermally 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, sufficient fireproof performance is obtained, and when it is 300 parts by weight or less, the mechanical strength is maintained. The compounding amount of the heat-expandable graphite is more preferably 20 parts by weight to 250 parts by weight.

  In the thermally expandable material, 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 fireproof performance is obtained, and when it is 400 parts by weight or less, the mechanical strength is maintained. The amount of the inorganic filler is more preferably 40 parts by weight to 350 parts by weight.

  In the thermally expandable material, when a phosphorus compound is added, the compounding amount of the phosphorus compound is 30 to 300 parts by weight with respect to 100 parts by weight of the resin component. If the blending amount is 30 parts by weight or more, the effect of improving the strength of the main body 2 after thermal expansion is sufficient, and if it is 300 parts by weight or less, the mechanical strength is maintained. The amount of the phosphorus compound is more preferably 40 to 250 parts by weight.

  As will be described later, when the main body 2 can be deformed, it is preferable to use an elastic material such as a polyvinyl chloride resin or a rubber substance as the resin component of the thermal expansion material described above. .

  The main body 2 described above is preferably molded into the above shape by injection molding, but may be molded by extrusion molding, compression molding, or the like. Molding by injection molding is preferable because the main body 2 can be manufactured without waste and with good yield and can be molded into a complicated shape. Further, as shown in FIG. 3, the main body 2 may be formed by rolling a thermal expansion sheet 5 formed into a sheet shape having a predetermined thickness with the above-described thermal expansion material.

  The main body 2 is provided with a plurality of cuts 4 along the axial direction on the outer peripheral surface. The main body 2 is capable of cutting a portion on the other end side at the cut 4. Further, the main body 2 is easily deformed at the cut 4. The cut line 4 may or may not penetrate through the thickness of the main body 2, but it is easier to divide the main body 2 and the main body 2 is easily deformed when penetrating. preferable. Moreover, the cut | interruption 4 may be provided over the circumference | surroundings of the circumferential direction of the main-body part 2, and may be provided so that a certain part may be left. Moreover, the cut | interruption 4 may extend continuously and may extend intermittently. In addition, when the cut 4 penetrates the thickness of the main body 2, it does not continuously extend over one circumference in the circumferential direction of the main body 2.

The interval in the axial direction of the cut 4 is not particularly limited, but if the interval is large, there is a possibility that the cut 4 is not present at that position when the main body 2 is to be cut or deformed at a desired position. On the other hand, if the interval is small, it may take time to form the cuts 4, and the strength of the main body 2 may be reduced. Therefore, the interval between the cut lines 4 is preferably 10 mm to 50 mm, and more preferably 20 mm to 40 mm.

  The fastening member 3 is formed of a non-combustible material made of a thermoplastic resin, a thermosetting resin, an elastomer, rubber, glass, metal, or a combination thereof that does not expand due to heat during a fire. Among these, metals (for example, iron wire, copper wire, stainless steel wire, etc.) can be preferably exemplified. In the present embodiment, the tightening member 3 is formed in a ring shape, and a plurality of members having different sizes are wound around the main body portion 2 in the axial direction. The ring shape is not particularly limited as long as it forms a ring such as a cylindrical shape having a single ring or a donut shape, or a spiral shape having a plurality of rings. When the tightening member 3 is cylindrical (including a tapered substantially cylindrical shape) or a donut shape, the tightening member 3 may be configured by one ring-shaped member, or a pair of The ring-shaped fastening member 3 may be configured by connecting semi-circular divided frame members (not shown). As a method of connecting a pair of divided frame members, one end portions of the pair of divided frame members can be hinged to be opened and closed, and the other end portions are connected by a fixing means such as a screw, or a pair of divided frame members. Although the method of connecting the one end parts and other end parts of a frame member with fixing means, such as a screw, can be mentioned, respectively, It does not specifically limit but various methods can be used. Further, the tightening member 3 may be partially embedded in the main body 2 and partially exposed from the main body 2 to form an uneven shape on the outer peripheral surface of the main body 2. It is buried and there is no unevenness in the outer peripheral surface of the main body 2 and it may be integrated.

  Next, a method for installing the fire protection device 1 described above with respect to the through hole 12 of the partition 11 will be described. First, as shown in FIG. 4, the fire protection device 1 is inserted into the through hole 12 of the partition body 11 from the other end side of the main body 2 that is tapered, from the fire protection section A side. And if it catches on the outer surface (peripheral edge part of the through-hole 12) of the division body 11 in any part of the one end part side which the base part 2 spreads as shown in FIG. Further press against the hole 12. Thereby, the main body 2 is deformed so as to be hooked with the outer surface of the partition 11, and a part of the outer peripheral surface of the main body 2 abuts against the outer surface of the partition 11 as shown in FIG. 6. A part of the outer peripheral surface of the main body 2 that contacts the outer surface of the partition body 11 is fixed to the outer surface of the partition body 11 using an adhesive, a pressure-sensitive adhesive, an adhesive tape, or the like, so that the main body section 2 is separated from the partition body 11. Fixed to. At this time, when one end portion side of the main body portion 2 protrudes larger than the through hole 12 of the partition body 11, the cut portion 4 at an appropriate position on the one end portion side is closer to the one end portion side than the cut portion 4 of the main body portion 2. Cut the part. And about the other end part side of the main-body part 2 which penetrated the through-hole 12 of the division body 11, it becomes the magnitude | size which can penetrate the one or several pipe body 13 which the internal insertion hole 20 penetrates to the through-hole 12. FIG. Then, the portion on the other end side from the cut 4 is cut at the cut 4 at an appropriate position. Then, after the tube body 13 is inserted into the insertion hole 20 from the opening on the other end side of the main body 2 and protruded from the opening on the one end side, the fastening member located on the most other end side of the main body 2 As shown in FIG. 1, the tube body 13 is firmly fixed to the main body portion 2 by pushing 3 toward the partition body 11 side (left side in the illustrated example) and tightening the tube body 13 with the main body portion 2. As a result, the fire protection device 1 is installed with respect to the penetrating portion 12 of the partition body 11, and the fire prevention structure 10 is constructed.

  In the fire prevention structure 10 using the fire protection device 1 described above, for example, even if a fire occurs from the fire prevention section B, at least the main body portion 2 of the fire protection device 1 expands due to the heat of the fire and fills the through-hole 12 and fire. Even if the tube body 13 is sometimes melted or burned away, the space formed by the tube body 13 being melted or burnt down due to the thermal expansion of the main body 2 is filled. Thereby, since the through-hole 12 of the division body 11 is completely obstruct | occluded by the fire prevention tool 1, it can prevent that a flame and heat leak from the through-hole 12 to the adjacent fire prevention division A.

  Further, in the fire protection device 1 of the present embodiment, a plurality of cuts 4 are formed in the main body 2, and the main body 2 with the cuts 4 at appropriate positions according to the size and total length of the through holes 12 of the partition 11. The size and the total length of the main body 2 can be set as appropriate. Therefore, it can install easily with respect to the through-hole of various magnitude | size and full length, and sufficient fire prevention performance can be expressed.

  In addition, since the main body 2 can be deformed, the insertion hole 20 is enlarged when the tubular body 13 is inserted into the internal insertion hole 20, so that the tubular body 13 can be easily inserted. In addition, since the main-body part 2 becomes easy to deform | transform by providing the cut | interruption 4 in the main-body part 2, the pipe body 13 can be inserted further easily. In addition, when the main body 2 is inserted into the through hole 12 of the partition 11, the main body 2 is deformed at a position where it is caught with the outer surface of the partition 11. Since this part abuts on the outer surface, the main body 2 can be fixed to the partition body 11 without using a fixing tool by fixing this portion to the outer surface of the partition body 11.

  In addition, since the plurality of fastening members 3 are wound around the main body 2, the tubular body 13 is tightened with the main body 2 using the fastening members 3 at appropriate positions, whereby the tubular body 13 is attached to the main body 2. Can be fixed.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible unless it deviates from the meaning of this invention.

  For example, in the fire protection device 1 of the above embodiment, the main body 2 is formed in a substantially cylindrical shape with both ends open, but the tapered other end of the main body 2 is pointed (closed) with a hollow cone. You may form in a shape.

  Further, in the fire protection device 1 of the above embodiment, a plurality of ring-shaped fastening members 3 are wound around the main body 2 along the axial direction. Two helical tightening members 3 may be wound around the main body 2.

  Further, in the fire protection device 1 of the above embodiment, the main body 2 can be deformed, but the main body 2 does not necessarily need to be deformable. When the main body 2 is not deformed or difficult to deform, the main body 2 is inserted into the through-hole 12 of the partition 11 and then the main body 2 is separately attached to the partition 11 using a fixture (not shown). It may be fixed.

  Moreover, in the fire prevention structure 10 of the said embodiment, in order to improve fireproof performance, you may provide the nonflammable material which consists of a nonflammable material in the internal peripheral surface of the through-hole 12 of the division body 11. FIG. As such an incombustible material, an aluminum glass cloth can be exemplified. The heat-shielding effect and the flame-shielding effect can be further enhanced by the heat reflection effect of the layer by the aluminum glass cloth.

  Further, in the fire prevention structure 10 of the above embodiment, the putty-like thermal expansion material is not used, but the putty-like thermal expansion material may be additionally filled in the voids in the through holes 12. The fire prevention structure 10 using a putty-like thermal expansion material is also within the scope of the present invention. Further, a non-thermally expandable putty-like refractory material may be additionally filled in the gaps in the through holes 12, and a fire prevention structure 10 using the putty-like refractory material also falls within the scope of the present invention. Shall.

  The disclosures of all patent applications and documents cited herein are hereby incorporated by reference in their entirety.

DESCRIPTION OF SYMBOLS 1 Fire prevention tool 2 Main-body part 3 Fastening member 4 Cut | interruption 10 Fire prevention structure 11 Partition body 12 Through-hole 13 Tube

Claims (5)

A fire protection device that is formed in a partition of a building and installed in a through-hole through which at least one pipe is inserted, and is used for fire prevention of the through-hole,
It has a thermal expansion property, and a hollow and axially perpendicular cross section inserted through the through hole has a circular main body,
The said main-body part is a fire protection tool formed in the taper shape which tapers toward the other end part from the one end part of an axial direction.   The fire protection device according to claim 1, wherein the outer peripheral surface of the main body portion is provided with a plurality of cuts along the axial direction.   The fire protection device according to claim 1, wherein the main body is deformable.   The fire protection device according to any one of claims 1 to 3, further comprising one spiral or a plurality of ring-shaped tightening members wound around the main body.   The fire prevention structure of a building in which the fire protection device according to any one of claims 1 to 4 is used in a through hole formed in a partition of a building and into which at least one pipe is inserted.