JP2017066851A - Fireproof structure of penetration part in division body of hollow structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fireproof structure of a penetration part in a division body of a building capable of exhibiting favorable fireproof performance with simple construction work, and capable of reducing construction cost.SOLUTION: A division body 2 includes: a floor material 5 for constituting a floor of an upper layer floor; a ceiling material 6 for constituting a ceiling of a lower layer floor which is provided at an interval with the floor material 5. Thermal expansion fire-resistant materials 8, 10 are provided at one of the periphery of a pipe body 4 of the floor material 5, the periphery of the pipe body 4 under the ceiling material 6, the outer peripheral surface of the pipe body 4 protruding above the floor material 5, and the outer peripheral surface of the pipe body 4 protruding under the ceiling material 6. Also, at a through-hole 30 of the floor material 5 and/or a through-hole 31 of the ceiling material 6, a sealing material 9 is provided so as to conceal a gap with the pipe body 4.SELECTED DRAWING: Figure 16

Description

  The present invention relates to a fire prevention structure of a penetrating portion in a partition having a hollow structure of a building.

  In a compartment of a hollow structure provided horizontally in a multi-layered building, in order to pass pipes such as cables and water supply pipes from the upper floor to the lower floor or vice versa, a through portion is formed in the compartment, It is necessary to insert a tubular body through this penetration. However, in order to give fireproof performance to the penetrating part of this partition body, as specified in the item (b) of Paragraph 1 of Article 5 of Article 129-2 of the Building Standards Act, for example, the penetrating part is made of steel. It was necessary to insert a non-combustible material such as a sleeve and to take fire prevention measures for the penetration portion, and to penetrate the penetration portion through the steel tube sleeve.

  However, in the fire prevention structure described above, it is necessary to cut the steel pipe in order to make the steel sleeve a predetermined length, or to fix the steel sleeve to the through portion of the hollow structure compartment. Work is complicated. Moreover, since it is necessary to cut a steel pipe, there also exists a subject that the expense for discarding the remaining scraps of an unnecessary steel pipe increases.

  Further, in the above-described fire prevention structure, it is necessary to insert the steel sleeve into the penetrating portion of the partition member having the hollow structure. However, the steel sleeve is formed respectively on the floor material and the ceiling material constituting the partition member having the hollow structure. If the positions of the through-holes are shifted and do not match, the through-holes cannot be inserted, so the positional accuracy of the through-holes formed in the flooring and ceiling material is required, and the through-holes are reliably It was also difficult to construct.

  The present invention has been made by paying attention to the above-mentioned problems, and can be reliably applied to the penetrating part by a simple construction work, can exhibit good fire prevention performance, and can reduce the construction cost. The object is to provide a fire prevention structure.

  The above-mentioned object of the present invention is a fire prevention structure of a penetrating portion that penetrates a hollow structural body horizontally provided in a multi-layered building and through which a tubular body is inserted. A floor material that constitutes a floor, and a ceiling material that constitutes a ceiling of a lower floor provided with a space from the floor material, and the periphery of the pipe body on the floor material, below the ceiling material Achieved by a fireproof structure in which a thermally expandable refractory material is provided on any of the periphery of the tube, the outer peripheral surface of the tube protruding above the flooring, and the outer peripheral surface of the tube protruding below the ceiling material Is done.

  In the fire prevention structure having the above-described structure, it is preferable that a sealing material is provided in the through hole of the flooring material and / or the through hole of the ceiling material so as to hide a gap between the tube body, It is further preferable that a sealing material is filled in a gap between the through hole of the flooring material and the through hole of the ceiling material and the tubular body.

  Further, in the fire prevention structure having the above-described configuration, the thermally expandable refractory material provided on the outer peripheral surface of the tube projecting on the floor material and the thermal expandability provided on the outer peripheral surface of the tube projecting under the ceiling material. It is preferable that the refractory material extends into the through hole of the floor material and into the through hole of the ceiling material.

  Further, in the fire prevention structure having the above-described configuration, the thermally expandable refractory material provided on the outer peripheral surface of the tube projecting on the floor material and the thermal expandability provided on the outer peripheral surface of the tube projecting under the ceiling material. It is preferable that the refractory material closes the through hole of the floor material and the through hole of the ceiling material.

  Further, in the fire prevention structure having the above-described configuration, the thermally expandable refractory material provided on the outer peripheral surface of the tube projecting on the floor material and the thermal expandability provided on the outer peripheral surface of the tube projecting under the ceiling material. It is preferable that the refractory material extends and is integrated into a hollow space between the floor material and the ceiling material.

  Further, in the fireproof structure configured as described above, the thermally expandable refractory material is provided around the tube body under the ceiling material and / or the outer peripheral surface of the tube body projecting under the ceiling material, and penetrates the floor material. It is preferable that a sealing material is provided in the hole so as to hide a gap between the tube body and the hole.

  According to the fire-proof structure of the penetration part in the partition of the building of the present invention, it is possible to reliably construct a fire-proof structure capable of expressing good fire-proof performance with a simple construction work on the penetration part, and to reduce the construction cost.

It is sectional drawing which shows schematic structure of the fire prevention structure which concerns on one Embodiment of this invention. It is sectional drawing which shows schematic structure of the fire prevention structure of FIG. 1 at the time of a fire outbreak. It is sectional drawing which shows schematic structure of the modification of the fire prevention structure of FIG. It is sectional drawing which shows schematic structure of the modification of the fire prevention structure of FIG. It is sectional drawing which shows schematic structure of the modification of the fire prevention structure of FIG. It is sectional drawing which shows schematic structure of the modification of the fire prevention structure of FIG. It is sectional drawing which shows schematic structure of the fire prevention structure which concerns on other embodiment of this invention. It is sectional drawing which shows schematic structure of the fire prevention structure of FIG. 7 at the time of a fire outbreak. It is sectional drawing which shows schematic structure of the modification of the fire prevention structure of FIG. It is sectional drawing which shows schematic structure of the modification of the fire prevention structure of FIG. It is sectional drawing which shows schematic structure of the fire prevention structure which concerns on other embodiment of this invention. It is sectional drawing which shows schematic structure of the fire prevention structure which concerns on other embodiment of this invention. It is sectional drawing which shows schematic structure of the fire prevention structure which concerns on other embodiment of this invention. It is sectional drawing which shows schematic structure of the fire prevention structure which concerns on other embodiment of this invention. It is sectional drawing which shows schematic structure of the fire prevention structure which concerns on other embodiment of this invention. It is sectional drawing which shows schematic structure of the fire prevention structure which concerns on other embodiment of this invention. It is sectional drawing which shows schematic structure of the fire prevention structure which concerns on other embodiment of this invention. It is sectional drawing which shows schematic structure of the fire prevention structure which concerns on other embodiment of this invention. It is sectional drawing which shows schematic structure of the fire prevention structure which concerns on other embodiment of this invention. It is sectional drawing which shows schematic structure of the fire prevention structure which concerns on other embodiment of this invention. It is sectional drawing which shows schematic structure of the fire prevention structure which concerns on other embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The fire prevention structure of the present invention is applied to a horizontal partition such as a floor or a ceiling of a multi-layer building, and prevents flames and heat from leaking from a through-hole formed in the partition during a fire. .

  FIG. 1 shows a fire prevention structure 1 according to an embodiment of the present invention, and is a schematic diagram for explaining a state where a pipe body 4 such as a pipe or a cable is inserted into a through portion 3 provided in a partition body 2. It is a fragmentary sectional view. The partition body 2 includes a floor material 5 that constitutes the floor of the upper floor and a ceiling material 6 that constitutes the ceiling of the lower floor. As the flooring 5, a material having high fire resistance such as an ALC plate or a precast concrete plate can be used. As the ceiling material 6, a reinforced gypsum board, a calcium silicate board, a gypsum board, a laminated board in which a ceramic blanket or rock wool felt is laminated on a calcium silicate board, or the like can be used. The flooring 5 and the ceiling 6 are not shown in the figure but are supported by a plurality of joists, beams, field edges, field edges, and the like.

  The partition body 2 has a hollow structure having a hollow space 7 surrounded by a left and right wall material (not shown) between the floor material 5 and the ceiling material 6. A through hole 30 and a through hole 31 for inserting the pipe body 4 are formed in the floor material 5 and the ceiling material 6, respectively, and the through part 3 is configured by the through holes 30 and 31 and the hollow space 7. ing.

  Examples of the pipe body 4 inserted through the penetration part 3 include a refrigerant pipe, a heat medium pipe, a water pipe, a sewage pipe, an injection / drain pipe, a gas pipe, a heating / cooling medium transfer pipe, a vent pipe, an electric cable, and an optical fiber cable. Etc.

  Any of the circumference of the pipe body 4 on the floor material 5, the circumference of the pipe body 4 below the ceiling material 6, the outer peripheral surface of the pipe body 4 protruding above the floor material 5, and the outer peripheral surface of the pipe body 4 protruding below the ceiling material 6. In addition, a thermally expandable refractory material 8 is provided. In this embodiment, the thermally expandable refractory material 8 is provided on the outer peripheral surface of the tube body 4 protruding on the floor material 5 at the root exposed from the floor material 5 of the tube body 4 to the indoor space side.

  The heat-expandable refractory material 8 is in the form of a sheet having a predetermined thickness (for example, 0.1 mm to 7.0 mm) in the present embodiment, and an adhesive tape is pasted on the heat-expandable refractory material 8 in advance. The outer peripheral surface of the tube 4 can be fixed to the outer peripheral surface of the tube body 4 by covering the outer peripheral surface of the tube body 4 in a single or multiple layers. The coating with the heat-expandable refractory material 8 is applied from the surface of the floor material 5 to a position of a predetermined length (for example, within 30 cm). The outer diameter of the heat-expandable refractory material 8 wound around the tubular body 4 may be the same as or larger than the outer diameter of the through hole 30 and may be smaller. That is, when the flooring 5 is viewed from above, the through hole 30 may or may not be hidden by the thermally expandable refractory material 8.

  The heat-expandable refractory material 8 is formed of, for example, a heat-expandable refractory material (resin composition) in which a resin component contains a heat-expandable layered inorganic material and an inorganic filler.

  Examples of the resin component include thermoplastic resins, thermosetting resins, rubber substances, and combinations thereof. Examples of the thermoplastic resin include polypropylene resins, polyethylene resins, poly (1-) butene resins, polyolefin resins such as polypentene resins, polystyrene resins, acrylonitrile-butadiene-styrene (ABS) resins, and polycarbonates. And synthetic resins such as polyresin, polyphenylene ether resin, acrylic resin, polyamide resin, polyvinyl chloride resin, phenol resin, polyurethane resin, and polyisobutylene.

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

  Rubber materials include natural rubber, isoprene rubber, butadiene rubber, 1,2-polybutadiene rubber, styrene-butadiene rubber, chloroprene rubber, nitrile rubber, butyl rubber, chlorinated butyl rubber, ethylene-propylene rubber, chlorosulfonated polyethylene, acrylic rubber , Rubber materials such as epichlorohydrin rubber, polyvulcanized rubber, non-vulcanized rubber, silicon rubber, fluorine rubber, urethane rubber, and the like.

  These synthetic resins and / or rubber substances can be used alone or in combination of two or more. Among these synthetic resins and / or rubber substances, those having flexible and rubbery properties are preferable. Those having such properties can be highly filled with an inorganic filler, and the resulting resin composition is flexible and easy to handle. In order to obtain a resin composition that is more flexible and easy to handle, a non-vulcanized rubber such as butyl or a polyethylene resin is preferably used. Furthermore, an epoxy resin is preferable from the viewpoint of improving the fire resistance by increasing the flame retardancy of the resin itself.

  Next, the heat-expandable layered inorganic material expands upon heating, but such heat-expandable layered inorganic material is not particularly limited, and examples thereof include vermiculite, kaolin, mica, and heat-expandable graphite. Can do. Thermally expandable graphite is a conventionally known substance, and 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, A graphite intercalation compound was produced by treatment with a strong oxidant such as chlorate, permanganate, dichromate, dichromate, hydrogen peroxide, etc., and the layered structure of carbon was maintained. It is a kind of crystalline compound as it is.

  The heat-expandable graphite obtained by acid treatment as described above is preferably 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. If the particle size is smaller than 200 mesh, the degree of expansion of graphite is small, and a sufficient expanded heat insulating layer cannot be obtained. If the particle size is larger than 20 mesh, there is an advantage that the degree of expansion of graphite is large. At the same time, dispersibility deteriorates and physical properties deteriorate. Examples of commercially available products of thermally expandable graphite include “GREP-EG” manufactured by Tosoh Corporation, “GRAFGUARD” manufactured by GRAFTECH, and the like.

  Next, the inorganic filler increases the heat capacity and suppresses heat transfer when the expanded heat insulating layer is formed, and works as an aggregate to improve the strength of the expanded heat insulating layer. 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 water-containing inorganic substances such as magnesium hydroxide, 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 the above, 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, zinc stearate, calcium stearate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powders, slag fiber, fly ash, dehydrated sludge, etc. All It is. 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, in 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 thereof include “Whiteon SB Red” having a particle size of 1.8 μm (manufactured by Bihoku Flour Industry Co., Ltd.), “BF300” having a particle size of 8 μm (manufactured by Bihoku Powder Company).

  Furthermore, the resin composition constituting the thermally expandable refractory material 8 may further contain a phosphorus compound in addition to the above-described components in order to increase the strength of the expanded heat insulating layer 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, phenylphosphine Examples include acid, diethylphenylphosphinic acid, diphenylphosphinic acid, bis (4-methoxyphenyl) phosphinic acid and the like. Among them, t-butylphosphonic acid is preferable in terms of high flame retardancy although it is expensive. The above phosphorus compounds may be used alone or in combination of two or more.

  In addition, the resin composition constituting the heat-expandable refractory material 8 has a phenolic, amine-based, sulfur-based antioxidant, metal harm-preventing agent, antistatic agent, stable, etc. as long as its physical properties are not impaired. An agent, a crosslinking agent, a lubricant, a softener, a pigment, and 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.

  The resin composition constituting the thermally expandable refractory material 8 is 10 to 350 parts by weight of the thermally expandable layered inorganic material and 30 to 400 parts by weight of the inorganic filler with respect to 100 parts by weight of the resin component such as thermoplastic resin or epoxy resin. What is contained in the range of a part is preferable.

  The total of the thermally expandable layered inorganic material and the inorganic filler is preferably in the range of 50 to 600 parts by weight with respect to 100 parts by weight of the resin component.

  Such a resin composition expands by heating to form a refractory heat insulating layer. According to this composition, the heat-expandable refractory material expands by heating such as a fire, and can obtain a necessary volume expansion coefficient. After expansion, a residue having a predetermined heat insulation performance and a predetermined strength is formed. It is possible to achieve stable fireproof performance.

  When the total amount of the thermally expandable layered inorganic material and the inorganic filler in the resin composition is 50 parts by weight or more, a sufficient amount of fire resistance can be obtained by satisfying the amount of residue after combustion. Physical properties are maintained.

  Furthermore, the resin composition constituting the heat-expandable refractory material 8 is made of, as necessary, an antioxidant such as phenol, amine or sulfur, a metal damage inhibitor, an antistatic agent, a stabilizer, a crosslink Additives such as agents, lubricants, softeners, pigments, tackifier resins, molding aids, and tackifiers such as polybutenes and petroleum resins.

  By kneading each component of the resin composition using a known apparatus such as a single-screw extruder, a twin-screw extruder, a Banbury mixer, a kneader mixer, a kneading roll, a reiki machine, and a planetary stirrer, the resin composition is obtained. Can be obtained.

  The heat-expandable refractory material is available as a commercial product. For example, a fire barrier manufactured by Sumitomo 3M Limited (a heat-expandable refractory material composed of a resin composition containing chloroprene rubber and vermiculite, expansion coefficient: 3 times, heat Conductivity: 0.20 kcal / m · h · ° C., Mitsui Metal Paint Co., Ltd., Medihicut (thermally expandable refractory material comprising a resin composition containing polyurethane resin and thermally expandable graphite, expansion coefficient: 4 times, thermal conductivity Rate: 0.21 kcal / m · h · ° C.), Sekisui Chemical Co., Ltd. fibroc.

The heat-expandable refractory material is not particularly limited as long as it is insulated by the expansion layer when exposed to a high temperature such as a fire, and has the strength of the expansion layer, but preferably 50 kW / m ² . The volume expansion coefficient after heating for 30 minutes under heating conditions is in the range of 3 to 50 times, more preferably the volume expansion coefficient is in the range of 5 to 40 times, and more preferably 8 to 35 times. Range.

  A clearance between the through hole 30 of the flooring 5 and the tubular body 4 is filled with a sealing material 9 having elasticity. The sealing material 9 is formed by filling a gap between the through hole 30 of the flooring 5 and the tubular body 4 with a viscous sealing agent (caulking agent). Examples of the sealing agent (caulking agent) include non-combustible materials such as fire-resistant putty and cement mortar, and joint treatment materials for gypsum boards. The sealing material 9 is filled in the gap between the through hole 31 of the ceiling material 6 and the pipe body 4 in addition to the gap between the through hole 30 of the floor material 5 and the pipe body 4. However, it may be filled only in the gap between the through hole 31 of the ceiling member 6 and the tube body 4.

  In the illustrated example, in order to conceal the gap between the through holes 30 and 31 of the floor material 5 and the ceiling material 6 and the pipe body 4, the sealing material 9 is filled into the through holes 30 and 31 to fill the gap. However, the sealing material 9 is not necessarily filled in the through holes 30 and 31. By providing the sealing material 9 around the tube body 4 above the through hole 30 and around the tube body 4 below the through hole 31, the through hole 30 is provided. , 31 and the tube 4 may be hidden.

  In the fire prevention structure 1 of the division body 2 using the above-described thermally expandable refractory material 8, since the root of the tubular body 4 exposed to the indoor space above the floor is covered with the thermally expandable refractory material 8, for example, the floor upper side As shown in FIG. 2, even if a fire occurs in the indoor space of the tube 4 and the tube 4 is melted and burnt down, the heat-expandable refractory material 8 is heated in the thickness direction of the tube 4 in the thickness direction. Thermal expansion in the radial direction closes the space formed by melting and burning of the tube body 4. In addition, the through hole 30 is shielded by the thermally expanded heat-expandable refractory material 8, and the gap between the through hole 30 and the tube body 4 is filled with the sealing material 9. Therefore, since the through hole 30 and the tube body 4 of the partition 2 can be completely closed, it is possible to prevent the flame and heat from entering the indoor space below the ceiling from the through hole 30 and the tube body 4 and spreading the fire. it can.

  Moreover, since the clearance between the through hole 30 of the flooring 5 and / or the through hole 31 of the ceiling material 6 and the tubular body 4 is hidden by the sealing material 9, the other side can be seen from above the floor or under the ceiling through the clearance. Can not be.

  Furthermore, the heat-expandable refractory material 8 can be easily provided by wrapping around the outer peripheral surface of the tubular body 4 from the indoor space side on the floor, and the tubular body 4 has a complicated shape or a plurality of tubular bodies. Even if 4 is inserted through the through-hole 3, the heat-expandable refractory material 8 can be provided in accordance with the shape of the tubular body 4, etc., so that the construction is simpler than when a conventional steel sleeve is used. The fire prevention structure 1 that can express good fire prevention performance in the work can be reliably applied to the penetration part 3. In addition, since the steel sleeve is not used, it is not necessary to discard unnecessary scraps of the steel pipe after cutting, and the construction cost can be reduced. In addition, when the several pipe body 4 is penetrated by the penetration part 3, you may coat | cover the several pipe body 4 collectively with the heat-expandable refractory material 8, and each several pipe body 4 is each separately. Alternatively, it may be covered with a thermally expandable refractory material 8.

  For example, even when a fire occurs in the indoor space below the ceiling, the heat-expandable refractory material 8 blocks the through-hole 30 and the pipe body 4 of the flooring 5. Flames and heat can be prevented from entering the indoor space above the floor and spreading.

  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 prevention structure 1 of the above embodiment, the thermally expandable refractory material 8 is provided on the outer peripheral surface of the tubular body 4 protruding on the floor material 5, but the outer peripheral surface of the tubular body 4 protruding below the ceiling material 6 is heated. Even if the expandable refractory material 8 is provided, the same effect as when the thermally expandable refractory material 8 is provided on the outer peripheral surface of the tubular body 4 protruding on the flooring 5 is produced. Thus, in the fireproof structure according to the present invention, the thermally expandable refractory material 8 is provided on either the outer peripheral surface of the tubular body 4 protruding above the flooring 5 or the outer peripheral surface of the tubular body 4 protruding below the ceiling material 6. By providing, good fireproof performance can be expressed, but as shown in FIG. 3, for any of the outer peripheral surface of the tube body 4 protruding above the flooring 5 and the outer peripheral surface of the tube body 4 protruding below the ceiling material 6. Also, a heat-expandable refractory material 8 can be provided. Thereby, more reliable fireproof performance can be expressed.

  In FIG. 3, the sealing material 9 is provided in the through hole 30 of the flooring 5 and the through hole 31 of the ceiling material 6, but may be provided only in one of the through holes 30 and 31. Good.

  Moreover, in the said embodiment, although the clearance gap between the through-hole 30 of the flooring 5 and the pipe body 4 is filled with the sealing material 9, as shown in FIG. The end portion of the thermally expandable refractory material 8 provided on the outer peripheral surface of the tubular body 4 protruding on the material 5 may be extended to the lower end of the through hole 30 so as to enter the through hole 30. In this embodiment, the thermally expansible refractory material 8 is thermally expanded by the heat at the time of the fire, so that the gap between the through hole 30 and the tubular body 4 is filled. In this embodiment, there may be a gap between the through hole 30 of the flooring 5 and the thermally expandable refractory material 8 in normal times, but as shown in FIG. It is preferable that the through hole 30 of the flooring 5 is closed by the thermally expandable refractory material 8. Similarly, when the thermally expandable refractory material 8 is provided on the outer peripheral surface of the tubular body 4 protruding below the ceiling material 6, the gap between the through hole 31 of the ceiling material 6 and the tubular body 4 is similarly sealed. 9, the end portion of the thermally expandable refractory material 8 provided on the outer peripheral surface of the tubular body 4 protruding below the ceiling material 6 is extended to the upper end of the through hole 31 so as to enter the through hole 31. Also good.

  In addition, as shown in FIG. 3, when the thermally expandable refractory material 8 is provided on both the outer peripheral surface of the tube body 4 protruding above the flooring 5 and the outer peripheral surface of the tube body 4 protruding below the ceiling material 6. As shown in FIG. 6, the thermally expandable refractory material 8 provided on the outer peripheral surface of the tubular body 4 projecting on the flooring 5 and the thermal expandable fireproof material provided on the outer peripheral surface of the tubular body 4 projecting under the ceiling material 6. The material 8 may be integrated by extending to the hollow space 7 between the floor material 5 and the ceiling material 6.

  In FIG. 6, the sealing material 9 may be provided in at least one of the through hole 30 of the floor material 5 and the through hole 31 of the ceiling material 6 so as to hide the gap between the through holes 30 and 31 and the tubular body 4. Good.

  Moreover, in the said embodiment, although the sheet-like thermally expansible refractory material 8 is wound around the outer peripheral surface of the tubular body 4 protruding on the flooring 5 and / or the outer peripheral surface of the tubular body 4 protruding below the ceiling material 6, As shown in FIG. 7, for example, a thermally expandable refractory material 10 may be provided around the tubular body 4 on the flooring 5. The thermally expandable refractory material 10 provided around the tube body 4 can also be formed of the same material as the thermally expandable refractory material 8 provided on the outer peripheral surface of the tube body 4.

  The heat-expandable refractory material 10 has a sheet shape or plate shape (for example, 0.1 mm to 7.0 mm) having a predetermined thickness, and has an opening 11 having a size that allows the tube body 4 to be inserted. The heat-expandable refractory material 10 is formed to be slightly larger than the through hole 30 of the flooring 5, and the shape thereof can be various shapes such as a square shape and a circular shape. The heat-expandable refractory material 10 is laid on the surface of the flooring 5 so as to shield the through-holes 30 of the flooring 5, and uses a physical fixing means such as an adhesive, an adhesive, and a screw. 5 is fixed. Further, the thermally expandable refractory material 10 is provided with a cut (not shown) reaching the outer peripheral edge from the opening 11. Thereby, the thermally expansible refractory material 10 can be installed with respect to the circumference | surroundings of the pipe body 4 penetrated by the penetration part 3 of the division body 2. FIG. That is, when the tubular body 4 has already been inserted through the penetrating portion 3 of the partition body 2, the tubular body 4 is positioned in the opening 11 with the thermally expandable refractory material 10 opened, and then the thermally expandable fireproof material. The thermally expandable refractory material 10 can be provided around the tubular body 4 by closing the material 10 and fixing it on the floor material 5.

  Also in the fire prevention structure 1 of the division body 2 using the above-described thermally expandable refractory material 10, since the thermally expandable refractory material 10 is provided around the tubular body 4 exposed in the indoor space above the floor, for example, on the floor As shown in FIG. 8, even if a fire occurs in the indoor space on the side, and the tubular body 4 is melted and burnt out, the thermally expandable refractory material 10 is in the thickness direction due to heat at the time of the fire. The space formed by melting and burning of the tube body 4 is closed. In addition, the through-hole 30 is shielded by the thermally expandable refractory material 10 that has been thermally expanded, and the gap between the through-hole 30 and the tubular body 4 is filled with the sealing material 9. Therefore, since the through hole 30 and the tube body 4 of the partition 2 can be completely closed, it is possible to prevent the flame and heat from entering the indoor space below the ceiling from the through hole 30 and the tube body 4 and spreading the fire. it can.

  Moreover, since the clearance between the through hole 30 of the flooring 5 and / or the through hole 31 of the ceiling material 6 and the tubular body 4 is hidden by the sealing material 9, the other side can be seen from above the floor or under the ceiling through the clearance. Can not be.

  Furthermore, the heat-expandable refractory material 10 can be easily provided by arranging it around the tubular body 4 from the indoor space side on the floor, and the shape of the tubular body 4 is complicated, or a plurality of tubular bodies Even if 4 is inserted through the through-hole 3, if the opening 11 is formed in accordance with the shape of the tube 4 or the like, the thermally expandable refractory material 10 can be provided around the tube 4, so that the conventional Compared to the case where a steel sleeve is used, the fire prevention structure 1 that can express good fire prevention performance with a simple construction work can be reliably applied to the penetration part 3. In addition, since the steel sleeve is not used, it is not necessary to discard unnecessary scraps of the steel pipe after cutting, so that the construction cost can be reduced.

  For example, even when a fire occurs in the indoor space below the ceiling, the heat-expandable refractory material 10 closes the through hole 30 and the tube body 4 of the flooring 5, so that the through hole 30 and the tube body 4 can be used. Flames and heat can be prevented from entering the indoor space above the floor and spreading.

  In the fire prevention structure 1 of the embodiment shown in FIG. 7, the thermally expandable refractory material 10 may be provided only around the tubular body 4 protruding below the ceiling material 6, and as shown in FIG. The heat-expandable refractory material 10 may be provided on both the periphery of the tube body 4 protruding above 5 and the periphery of the tube body 4 protruding below the ceiling material 6.

  In FIGS. 7 and 9, the sealing material 9 is provided in the through hole 30 of the flooring 5 and the through hole 31 of the ceiling material 6, but is provided only in one of the through holes 30 and 31. May be.

  Further, in the fire prevention structure 1 of the embodiment shown in FIG. 7, the thermally expandable refractory material 10 is in the form of a sheet or a plate, but as shown in FIG. Good. In FIG. 10, the thermally expandable refractory material 10 has a flange portion 10 </ b> A, and a physical fixing means such as a screw, in addition to an adhesive and an adhesive, is provided on the surface of the flooring 5 at the flange portion 10 </ b> A. The flange portion 10A is not necessarily provided.

  In FIG. 10, the sealing material 9 is provided in the through hole 30 of the floor material 5 and the through hole 31 of the ceiling material 6, but may be provided only in one of the through holes 30 and 31. .

  As shown in FIG. 11, a heat-expandable refractory material 8 is wrapped around the outer peripheral surface of the tube body 4 protruding on the floor material 5, and a heat-expandable refractory material 10 is laid around the tube body 4 under the ceiling material 6. As shown in FIG. 12, a thermally expandable refractory material 8 is wrapped around the outer peripheral surface of the tubular body 4 protruding below the ceiling material 6, and a thermally expandable refractory material 10 is wrapped around the tubular body 4 on the flooring 5. May be laid. Moreover, as shown in FIG. 13, the outer peripheral surface of the tubular body 4 projecting on the flooring 5, the outer circumferential surface of the tubular body 4 projecting below the ceiling member 6, the periphery of the tubular body 4 on the flooring 5, and the ceiling material The heat-expandable refractory materials 8 and 10 may be provided on any of the surroundings of the lower tube body 6. Further, in FIG. 13, the outer peripheral surface of the tubular body 4 protruding above the flooring 5, the outer peripheral surface of the tubular body 4 protruding below the ceiling material 6, the periphery of the tubular body 4 on the flooring 5, and the bottom of the ceiling material 6. Any of the thermally expandable refractory materials 8 and 10 around the tube body 4 may be omitted. That is, the outer peripheral surface of the tubular body 4 protruding above the flooring 5, the outer peripheral surface of the tubular body 4 protruding below the ceiling material 6, the periphery of the tubular body 4 on the flooring 5, and the tubular body 4 below the ceiling material 6. You may provide the thermally expansible refractory materials 8 and 10 in arbitrary three places out of circumference | surroundings. For example, as shown in FIG. 14, a heat-expandable refractory material 8 is wound around the outer peripheral surface of the tubular body 4 protruding above the flooring 5 and the outer peripheral surface of the tubular body 4 protruding below the ceiling material 6, and the tube below the ceiling material 6. A heat-expandable refractory material 10 is laid around the body 4, or a heat-expandable refractory material 8 is wound around the outer peripheral surface of the tubular body 4 protruding below the ceiling material 6 as shown in FIG. A thermally expandable refractory material 10 may be laid around the tube body 4 and around the tube body 4 below the ceiling material 6.

  11 to 15, the sealing material 9 is provided in the through hole 30 of the flooring 5 and the through hole 31 of the ceiling material 6, but is provided only in one of the through holes 30 and 31. May be.

  In any of the above-described embodiments, the sealing material 9 is not necessarily provided.

  As mentioned above, although various embodiment was described about the fire prevention structure of this invention, more preferable embodiment is shown in FIG. In the embodiment of FIG. 16, the sheet-like thermally expandable refractory material 8 with the adhesive tape attached in advance is wound around the outer peripheral surface of the tubular body 4 projecting under the ceiling material 6 in a single layer or multiple layers, thereby expanding the thermal expansion property. A refractory material 8 is provided. In the embodiment of FIG. 16, a sheet-like or plate-like thermally expandable refractory material 10 having a predetermined thickness shields the through hole 31 of the ceiling floor 6 around the tube body 4 below the ceiling material 6. It is provided as such. This heat-expandable refractory material 10 is fixed below the ceiling material 6 by using a physical fixing means such as a screw in addition to an adhesive and an adhesive.

  On the other hand, a sealing material 9 having elasticity is provided in the through hole 30 of the flooring 5 so as to hide the gap between the tubular body 4. The sealing material 9 is provided by applying a viscous sealing agent (caulking agent) around the pipe body 4 on the through hole 30 from the floor material 5. The sealing material 9 is provided not only around the tube body 4 on the through hole 30 of the flooring 5 but also in a gap between the tube body 4 in the through hole 30 as shown in FIG. Moreover, although illustration is abbreviate | omitted, you may provide only in the clearance gap between the pipe bodies 4 in the through-hole 30. FIG.

  According to this embodiment, for example, even if a fire occurs in the indoor space below the ceiling, for example, the thermally expandable refractory materials 8 and 10 are thermally expanded due to the heat at the time of the fire, and the tubular body 4 is melted and burned out. The space that can be formed is closed, and the through-hole 31 of the ceiling member 6 is shielded by the thermally expandable refractory materials 8 and 10 that have been thermally expanded. Further, the gap between the through hole 30 of the flooring 5 and the tube body 4 is closed by the sealing material 9. Therefore, it is possible to prevent flames and heat from entering the indoor space above the floor from the through holes 30 and 31 and the pipe body 4 and spreading the fire. Further, for example, even when a fire occurs in the indoor space above the floor, the through-holes 31 and the tubular body 4 of the ceiling material 6 are closed by the thermally expandable refractory materials 8 and 10, so the through-hole 30 and the tubular body 4. It is possible to prevent flames and heat from entering the indoor space above the floor and spreading fire. According to the experiments by the present inventors, in this way, at least one of the through-hole 30 of the flooring 5 and the through-hole 31 of the ceiling material 6 is thermally expandable refractory that can be thermally expanded in the event of a fire and close the through-hole. It has been found that even if a material is provided, a sufficient fire-proof performance capable of preventing the spread of fire at the time of fire can be exhibited even if a sealing material having a poor fire resistance is provided in the other through-hole instead of a heat-expandable fire-resistant material. Therefore, in this embodiment, a fire prevention structure having sufficient fire prevention performance can be reliably constructed with a simpler and shorter construction work, and the construction cost can be further reduced.

  Further, since the gap between the through hole 30 of the flooring 5 and the tubular body 4 is hidden by the sealing material 9 provided in the through hole 30 of the flooring 5, the other side can be seen from above the floor or under the ceiling through the gap. Can not be.

  Moreover, since the sealing material 9 is not provided in the through hole 31 of the ceiling material 6, the construction work can be further simplified and shortened. That is, when the sealing material 9 is provided in the through hole 31 of the ceiling material 6, for example, a viscous sealing agent (caulking agent) is applied around the tube body 4 below the through hole 31. Since the sealing agent (caulking agent) hangs down due to its own weight, it is difficult to install the sealant and the through holes 30 and 31 are often located at the corners of the indoor space. Although it is still difficult to install in 31, as in this embodiment, by providing the sealing material 9 in the through hole 30 from the floor, problems such as dripping of the sealing agent (caulking agent) by its own weight can be solved. Work can be simplified.

  In FIG. 16, the thermally expandable refractory materials 8 and 10 are provided on the outer peripheral surface of the tube body 4 protruding below the ceiling material 6 and around the tube body 4 below the ceiling material 6, but as shown in FIG. 18. Further, the heat-expandable refractory material 8 may be provided only on the outer peripheral surface of the tubular body 4 projecting under the ceiling material 6, and as shown in FIG. 19, around the tubular body 4 under the ceiling material 6. Only the thermally expandable refractory material 10 may be provided. Further, in both the embodiments of FIGS. 18 and 19, the sealing material 9 is not only around the tube body 4 on the through hole 30 of the flooring 5, but also as shown in FIGS. 20 and 21. It may also be provided in the gap between the body 4 and may be provided only in the gap between the pipe body 4 in the through hole 30 although illustration is omitted.

DESCRIPTION OF SYMBOLS 1 Fire prevention structure 2 Compartment 3 Penetration part 4 Tube 5 Floor material 6 Ceiling material 8 Thermal expansion fireproof material 9 Sealing material 10 Thermal expansion fireproof material 30 Floor material through-hole 31 Ceiling material through-hole

Claims (7)

It is a fire prevention structure of a penetrating part that penetrates a hollow structure section horizontally provided in a multi-layered building and through which a tubular body is inserted,
The partition body includes a floor material constituting a floor of an upper floor, and a ceiling material constituting a ceiling of a lower floor provided at an interval from the floor material,
Any of the periphery of the tube on the floor, the periphery of the tube under the ceiling, the outer peripheral surface of the tube protruding above the floor, and the outer periphery of the tube protruding below the ceiling And a fire-proof structure provided with a heat-expandable refractory material.   The fireproof structure according to claim 1, wherein a sealing material is provided in the through hole of the floor material and / or the through hole of the ceiling material so as to hide a gap between the pipe body.   The fireproof structure according to claim 2, wherein the sealing material is filled in a gap between the through hole of the floor material and / or the through hole of the ceiling material and the pipe body.   The thermally expandable refractory material provided on the outer peripheral surface of the tubular body projecting on the floor material and the thermally expandable refractory material provided on the outer peripheral surface of the tubular body projecting under the ceiling material penetrate the floor material. The fireproof structure according to claim 1, which extends into the hole and into the through hole of the ceiling material.   The thermally expandable refractory material provided on the outer peripheral surface of the tubular body projecting on the floor material and the thermally expandable refractory material provided on the outer peripheral surface of the tubular body projecting under the ceiling material penetrate the floor material. The fireproof structure according to claim 4, wherein the hole and the through hole of the ceiling material are closed.   The thermally expandable refractory material provided on the outer peripheral surface of the tube projecting on the floor material and the thermally expandable refractory material provided on the outer peripheral surface of the tube projecting under the ceiling material are the floor material and the The fireproof structure according to claim 4 or 5, wherein the fireproof structure extends to a hollow space between the ceiling material and is integrated. The thermally expandable refractory material is provided around the tube body under the ceiling material and / or the outer peripheral surface of the tube body protruding below the ceiling material,
The fireproof structure according to claim 1, wherein a sealing material is provided in the through hole of the floor material so as to hide a gap between the floor material and the pipe body.