JP6876396B2 - Fireproof filling structure and construction method of fireproof filling structure - Google Patents

Description

The present invention relates to a fireproof filling structure in which piping or wiring is performed using a sleeve for forming a compartment through hole in the floor or wall of a building, and a method of constructing the fireproof filling structure.

In the concrete placement floor on each floor of the building, it is necessary to form a section penetration structure in order to pass pipes and / or wiring from upstairs to downstairs and vice versa. Specifically, a partition through hole for passing a pipe and / or a wiring is formed in a floor or a wall body such as concrete, but conventionally, as described in, for example, Patent Document 1, a void is formed before concrete is placed. Alternatively, a pipe called a sleeve was erected vertically on the floor base and fixed, concrete was poured around the sleeve to make a concrete floor, and the concrete floor was cured. The hollow part of the sleeve was used as a partition through hole, and piping and / or wiring was passed through. And since the sleeve is generally made of resin, paper or metal, in the event of a fire the fire could propagate from the compartment to the adjacent compartment through the pipes and / or wiring.

JP-A-6-257281

By the way, in order to prevent fire from propagating from the compartment to the adjacent compartment, a part of the sleeve is formed of a heat-expandable refractory resin material, and the sleeve is thermally expanded in the event of a fire to cause a compartment through hole. (Hollow part of sleeve) may be blocked.

However, if the portion of the heat-expandable refractory resin material is increased in order to increase the closing property of the compartment through hole, the material cost of the sleeve increases. Even if the portion of the heat-expandable refractory resin material is increased, if the sleeve thermally expands in the axial direction of the sleeve, the compartment through hole (hollow portion of the sleeve) is closed by the thermal expansion of the sleeve. I can't.

An object of the present invention is a fireproof filling structure in which piping or wiring is performed using a sleeve for forming a partition through hole in the floor or wall of a building, and the partition penetration is performed in the event of a fire while keeping the material cost low. It is an object of the present invention to provide a fireproof filling structure capable of reliably closing a hole, and a method of constructing the fireproof filling structure.

In order to achieve the above object, the present invention includes the subjects described in the following sections.

Item 1. A fireproof filling structure that is piped or wired using a sleeve to form a compartmentalized through hole in the floor or wall of a building.
The sleeve
With non-expandable parts or fixtures,
It has a cylindrical expansion part with thermal expansion, and has a tubular expansion part.
The extension surface that extends the inner peripheral surface of the expansion portion coincides with the inner peripheral surface of the non-expansion portion or the fixture, or is inward of the extension surface that extends the inner peripheral surface of the expansion portion. A refractory filling structure in which the non-expanding part or fixture is located.

Item 2. The sleeve
The first cylinder and
A second tubular body as the expansion portion is provided.
The first cylinder and the second cylinder are aligned along their axial directions, and in this state, the inner peripheral surface of the first cylinder extends the inner peripheral surface of the second cylinder. The inner peripheral surface of the first cylinder is located inside or outside the extension surface of the extension of the inner peripheral surface of the second cylinder, and the first cylinder is aligned with the extension surface. Item 2. The item 1 wherein the distance between the inner peripheral surface of the first cylinder and the extension surface extending the inner peripheral surface of the second cylinder is 5% or less of the inner diameter of the second cylinder. Fireproof filling structure to be done.

Item 3. By aligning the first cylinder and the second cylinder along their axial directions, a hollow portion in which the inside of the first cylinder and the inside of the second cylinder are connected is formed. The pipe or wiring is passed through the hollow portion, and the non-expandable portion or fixture is arranged in the hollow portion so as to close the gap between the wall surface of the hollow portion and the pipe or wiring. Item 2. The fireproof filling structure according to Item 2.

Item 4. The first cylinder has a non-expandable property.
Item 3. The fireproof filling structure according to Item 3.

Item 5. Item 3 or 4, wherein the non-expanding portion or fixture is arranged inside the first cylinder so as to close a gap between the inner peripheral surface of the first cylinder and the pipe or wiring. Fireproof filling structure to be done.

Item 6. Item 3 or 4, wherein the non-expanding portion and the fixture are arranged inside the first cylinder so as to close a gap between the inner peripheral surface of the first cylinder and the pipe or wiring. Fireproof filling structure to be done.

Item 7. Item 2. The fireproof filling structure according to any one of Items 1 to 6, wherein the non-expanding portion and the fixture are arranged so as not to come into contact with the second cylinder.

Item 8. Items 1 to 7 in which the sleeve is composed of three or more cylinders by fitting another cylinder inside the first cylinder and / or inside the second cylinder. Fireproof filling structure described in Crab.

Item 9. Item 2. The fireproof filling structure according to any one of Items 1 to 8, wherein the non-expanding portion or fixture is formed of a nonflammable material or a flame-retardant material.

Item 10. The method for constructing a refractory filling structure according to any one of Items 1 to 9.
The process of installing the sleeve on the floor base or wall base, and
The step of filling the outer periphery of the sleeve with a filler and
Construction method of fireproof filling structure including.

Item 11. Item 10. The construction method according to Item 10, further comprising a step of passing a pipe or wiring through the sleeve after filling the filler.

According to the present invention, the partition through hole can be reliably closed in the event of a fire while keeping the material cost of the sleeve low.

An exploded schematic perspective view of a sleeve according to an embodiment of the present invention. Side sectional view of the sleeve. (A) top view, (B) side sectional view, (C) bottom view of the first cylinder. (A) Top view of the second cylinder, (B) side sectional view, (C) bottom view. A schematic side view of a state in which the second cylinder is fitted to the first cylinder. FIG. 3 is a schematic cross-sectional view of a method of constructing a compartment penetrating structure of the present invention using the sleeve of FIG. Schematic cross-sectional view of another example sleeve. Schematic cross-sectional view of another example sleeve. Schematic cross-sectional view of another example sleeve. Schematic cross-sectional view of another example sleeve. Schematic cross-sectional view of another example sleeve. Schematic cross-sectional view of another example sleeve. Schematic cross-sectional view of another example sleeve.

The refractory filling structure of the embodiment of the present invention will be described with reference to the drawings.

The fireproof filling structure according to the present embodiment is a pipe or wiring using a sleeve 1 for forming a compartment through hole in the floor or wall of a building. The above-mentioned "building" is, for example, a building material such as a detached house, an apartment house, a high-rise house, a high-rise building, a commercial facility, a public facility, a passenger ship, a transport ship, a ship such as a connecting ship, and a structure such as a vehicle. However, the structures to which the fireproof filling structure of the present invention can be applied are not limited to the above examples.

The sleeve 1 is also referred to as a void, and as shown in FIGS. 1, 2, and 3, the sleeve 1 includes a first tubular body 10, a second tubular body 20 as an inflatable portion, and a non-expandable portion 30. (FIG. 2) and a fixture 40 are provided. Concrete 5 (FIG. 2) is cast around the outside of the sleeve 1, and the hollow portion 6 is formed by connecting the inside 10a of the first cylinder 10 and the inside 20a of the second cylinder 20. Will be done. The hollow portion 6 functions as a partition through hole 7 of the floor or a wall, and in the event of a fire, the thermal expansion of the second tubular body 20 (expansion portion) causes the sleeve 1 to expand in the axial direction 9 (FIG. 1). , FIG. 5) causes the compartment through hole 7 (hollow portion 6) to be closed (FIG. 7).

The first tubular body 10 is non-expandable, and includes a substantially cylindrical main body portion 11 and a substantially cylindrical enlarged diameter portion 16 that is continuous via the main body portion 11 and the step portion 15. (Figs. 1 to 3). In the present embodiment, the main body portion 11, the step portion 15, and the diameter-expanded portion 16 are continuously formed from the same non-thermally expandable material, and the first tubular body 10 is continuously formed from the upper end 12 to the lower end 18. There is. The non-thermally expandable material is, for example, a metal such as steel, copper or stainless steel, or a non-thermally expandable fireproof resin material such as acrylic resin, epoxy resin, polypropylene resin or vinyl chloride.

As shown in FIGS. 1, 2, and 4, the second tubular body 20 includes a heat-expandable substantially cylindrical main body portion 21 that can be fitted in the enlarged diameter portion 16 of the first tubular body 10. An annular member 26 and an annular protrusion 28 mounted around the main body 21 are provided. The annular member 26 projects from one end of the side surface of the main body 21 (lower end 23 in the figure), and the annular protrusion 28 projects from the middle portion of the side surface of the main body 21.

The main body 21 is formed of a heat-expandable refractory resin material. The refractory resin material is a resin composition containing a heat-expandable layered inorganic substance as a resin component. The member made of the fire-resistant resin material of the second cylinder 20 including the main body 21 is a single-screw extruder, a twin-screw extruder, a Banbury mixer, a kneader mixer, a kneading roll, a raikai machine, and a planetary type. It can be obtained by kneading using a known device such as a stirrer and molding by a known molding method.

As the resin component, known resin components can be widely used, and examples thereof include thermoplastic resins, thermosetting resins, rubber substances, and combinations thereof.

Examples of the thermoplastic resin include polyolefin resins such as polypropylene resin, polyethylene resin, poly (1-) butene resin, and polypentene resin, polystyrene resin, acrylonitrile-butadiene-styrene (ABS) resin, polycarbonate resin, and polyphenylene ether resin. Meta) Examples thereof include synthetic resins such as acrylic resin, polyamide resin, polyvinyl chloride resin, novolak resin, polyurethane resin and polyisobutylene.

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

Rubber substances 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. , Epichlorohydrin rubber, polyvulverable rubber, non-vulture rubber, silicon rubber, fluororubber, urethane rubber and other rubber substances.

As these synthetic resins and / or rubber substances, one kind or two or more kinds can be used.

Among these synthetic resins and / or rubber substances, those having properties such as cold resistance, heat resistance, and oil resistance that can be flexibly adjusted are preferable. In order to obtain a resin composition having more flexible properties and being easy to handle, a vinyl chloride resin to which a plasticizer is added is preferably used. Instead, an epoxy resin is preferable from the viewpoint of increasing the flame retardancy of the resin itself and improving the fire protection performance.

The heat-expandable layered inorganic substance expands when heated. The heat-expandable layered inorganic substance is not particularly limited, and examples thereof include vermiculite, kaolin, mica, and heat-expandable graphite. Thermally expandable graphite is a conventionally known substance, in which 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 excess. A graphite interlayer compound was produced by treatment with a strong oxidizing agent such as chlorate, permanganate, dichromate, dichromate, hydrogen peroxide, etc., and the layered structure of carbon was maintained. It is a kind of raw crystalline compound. The heat-expandable graphite obtained by the acid treatment as described above may be further neutralized with ammonia, an aliphatic lower amine, an alkali metal compound, an alkaline earth metal compound or the like. Examples of commercially available products of heat-expandable graphite include "GREP-EG" manufactured by Tosoh Corporation, "ADT-351" and "ADT-501" manufactured by ADT, and "GRAFGUARD" manufactured by GRAFTECH.

The resin composition preferably contains the heat-expandable layered inorganic substance in the range of 10 to 350 parts by weight with respect to 100 parts by weight of the resin component such as the thermoplastic resin and the epoxy resin.

The resin composition constituting the heat-expandable refractory material may further contain an inorganic filler. 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 ferrite; calcium hydroxide, magnesium hydroxide, etc. 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 soil, dosonite, barium sulfate, talc, clay, mica, montmorillonite, bentonite, active white clay, and sepiolite. , Imogolite, serisite, 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 lead zirconate titanate, zinc stearate, calcium stearate, aluminum borate, molybdenum sulfide, silicon carbide, stainless fiber, zinc borate, various magnetic powders, slag fiber, fly ash, and dehydrated sludge. These inorganic fillers can be used alone or in combination of two or more.

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

The resin composition preferably contains an inorganic filler in the range of 30 to 400 parts by weight with respect to 100 parts by weight of the resin component such as the thermoplastic resin or epoxy resin.

The total amount of the heat-expandable layered inorganic substance 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.

Further, the resin composition constituting the heat-expandable refractory material may further contain a phosphorus compound in addition to the above-mentioned components in order to increase the strength of the expansion heat insulating layer and improve the fire protection performance. 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 polyphosphate; 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 protection performance, and ammonium polyphosphate is more preferable from the viewpoint of performance, safety, cost, and the like.

In the chemical formula (1), R ¹ and R ³ represent hydrogen, a linear or branched alkyl group having 1 to 16 carbon atoms, or an aryl group having 6 to 16 carbon atoms. R ² is a hydroxyl group, a linear or branched alkyl group having 1 to 16 carbon atoms, a linear or branched alkoxyl group having 1 to 16 carbon atoms, an aryl group having 6 to 16 carbon atoms, or carbon. Represents an aryloxy group of number 6-16.

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 polyphosphate is 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, "FR CROS 484" and "FR CROS 487" manufactured by Budenheim Ibica.

The compound represented by the chemical formula (1) is not particularly limited, and for example, methylphosphonate, dimethyl methylphosphonate, diethyl methylphosphonate, ethylphosphonate, n-propylphosphonate, n-butylphosphonate, 2-methylpropylphosphonate. Acids, t-butylphosphonates, 2,3-dimethyl-butylphosphonates, octylphosphonates, phenylphosphonates, dioctylphenylphosphonates, dimethylphosphonates, methylethylphosphinates, methylpropylphosphinates, diethylphosphonates, dioctylphosphonates Acids, phenylphosphonates, 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.

Such a resin composition expands by heating to form a refractory heat insulating layer. According to this composition, the heat-expandable refractory material can be expanded by heating such as a fire to obtain a required coefficient of thermal expansion, and after expansion, it can have a predetermined heat insulating performance and can form a combustion residue. , Stable fire resistance can be achieved.

Further, each of the resin compositions includes antioxidants such as phenol-based, amine-based, and sulfur-based antioxidants, as well as metal damage inhibitors, antistatic agents, and stabilizers, as long as they do not impair the object of the present invention. , Crosslinking agents, lubricants, softeners, pigments, antistatic resins, additives such as molding aids, and antistatic agents such as polybutene and petroleum resins.

The heat-expandable refractory resin material is available as a commercial product. For example, a fire barrier manufactured by Sumitomo 3M Co., Ltd. (a heat-expandable refractory material composed of a resin composition containing chloroprene rubber and vermiculite, expansion coefficient: 3 times , Thermal conductivity: 0.20 kcal / m · h · ° C), Medihicut (coefficient of thermal expansion made of resin composition containing polyurethane resin and heat-expandable graphite), Coefficient of expansion: 4 times , Thermal conductivity: 0.21 kcal / m · h · ° C.), thermal expansion refractory materials such as Fiblock manufactured by Sekisui Chemical Industry Co., Ltd. can also be mentioned.

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 in a fire and has the strength of the expansion layer. It is preferable that the volume expansion coefficient after heating for 30 minutes under a heating condition of 50 kW / m ^{2 is 3 to 50 times.} When the volume expansion coefficient is 3 times or more, the expansion volume can sufficiently fill the burned portion of the resin component, and when the expansion volume is 50 times or less, the strength of the expansion layer is maintained and the penetration of flame is prevented. The effect is maintained.

The annular member 26 and the annular protrusion 28 may be formed of the same heat-expandable refractory resin material as the main body 21, or may be formed of a metal such as steel or a non-heat-expandable refractory resin material such as hard vinyl chloride. May be done. The annular member 26 and the annular protrusion 28 are preferably made of metal. The annular member 26 includes one or more mounting portions 27 (four in the figure) extending outwardly perpendicular to the axis of the second tubular body 20 from the annular member 26. Each of the mounting portions 27 is represented by four mounting portions separated by about 90 ° with respect to the shaft 9 (FIGS. 1 and 5) of the sleeve 1, and each mounting portion 27 fixes the second tubular body 20 to the floor base 101. It has a hole 27a for the purpose. Normally, the bottomed rectangular formwork 102 is for accommodating the concrete 5 (see FIG. 6B), and the reinforcing bar R for reinforcing the concrete 5 is accommodated in the formwork 102. The concrete 5 and the reinforcing bar R constitute the floor base 101, and the floor base 101 constitutes the floor.

A metal wire such as a wire, a fixing member such as a bolt, a screw, or a nail can be passed through the hole 27a to fix the second cylinder 20 to the formwork 102, the reinforcing bar R, the concrete 5, or the like, for example, fixing. The second tubular body 20 is fixed to the reinforcing bar R by connecting both ends of the metal wire, which is a member, to the reinforcing bar R, or by passing bolts, screws, nails, etc. through the hole 27a and pouring concrete 5 around the hole 27a. To.

As shown in FIGS. 2 and 5, in a state where the second cylinder 20 is fitted to the first cylinder 10, the first cylinder 10 and the second cylinder 20 are the cylinders 10 and 20. They are aligned along the axial direction of the main bodies 11 and 21 (the direction of the axis 9 of the sleeve 1). Further, in a state where the second cylinder 20 is fitted to the first cylinder 10, the inner peripheral surface 17 of the enlarged diameter portion 16 of the first cylinder 10 and the outer peripheral surface 24 of the main body 21 of the second cylinder 20 A part of the outer peripheral surface 24 of the main body 21 is exposed to the outside of the enlarged diameter portion 16.

By forming the main body 21 of the second cylinder 20 from a heat-expandable refractory resin material, the adhesion between the second cylinder 20 and the concrete is improved (in the event of a fire, the second cylinder 20 and the combustion residue Adhesion with concrete is improved), and the heat insulating layer is less likely to collapse. Further, if the amount of the heat-expandable refractory resin material is large, the sleeve 1 is easily deformed by an external impact. However, by forming the first cylinder 10 with a non-heat-expandable material such as metal, the sleeve 1 is externally formed. The strength against impact can be increased. In addition, the amount of expansion material used can be minimized, and a penetrating sleeve can be provided at an appropriate price. In this way, the sleeve 1 is formed by combining the non-thermally expandable first cylinder 10 and the second cylinder 20 having the thermally expandable main body 21, thereby imparting fire resistance to the fireproof filling structure. Furthermore, it has both strength against external impact and adhesion to concrete, and can be provided at an appropriate price.

Preferably, the sleeve 1 has the second tubular body 20 fitted to the first tubular body 10.
0 <(Exposure area of the outer peripheral surface 24 of the second cylinder 20 / Exposed area of the outer peripheral surface 13 of the first cylinder 10) × 100 ≦ 100 ・ ・ ・ Equation (1)
Meet. "Exposure" means that the first cylinder 10 is in a state of being visible when observed by an operator from a side surface perpendicular to the axis, and means a portion in contact with concrete when placed. In FIG. 5, the exposed portion of the first tubular body 10 is the portion of the outer peripheral surface 13 extending the length of X, and the exposed portion of the second tubular body 20 is the portion of the outer peripheral surface 24 extending the length of Y.

By satisfying the formula (1), the exposed area of the outer peripheral surface 13 of the first cylinder 10 is larger than the exposed area of the outer peripheral surface 24 of the second cylinder 20, so that it is resistant to external impacts (physical and chemical). Has the effect of becoming stronger.

Also preferably, the sleeve 1 is
_{10 ≦ (volume V 2} of the main body of the second cylinder) / (sum of the volume of the first cylinder and the volume of the second sleeve V ₁ ) × 100 (%) ≦ 80 ・ ・ ・ Equation (2)
Meet.

When (volume of the main body of the second cylinder) / (sum of the volume of the first cylinder and the volume of the second sleeve) × 100 (%) is 10 (%) or more, the fire resistance is sufficient. When (volume of the main body of the second cylinder) / (sum of the volume of the first cylinder and the volume of the second sleeve) × 100 (%) is 80 (%) or less, the price of the sleeve can be suppressed. .. In addition, damage to the fireproof structure such as pushing up the lid and the annular member due to excessive expansion during a fire is prevented.

Further, in the present embodiment, the inner diameter A (FIG. 3 (B)) of the main body 11 of the first cylinder 10 is equal to the inner diameter B (FIG. 4 (B)) of the main body 21 of the second cylinder 20. From this, as shown in FIGS. 2 and 5, the second cylinder 20 is fitted to the first cylinder 10, and the first cylinder 10 and the second cylinder 20 are in the axial direction 9 of these. In the state of being aligned along the line, the inner peripheral surface 14 of the main body 11 of the first cylinder 10 is an extension surface 250 (FIG. 2) which is an extension of the inner peripheral surface 25 of the main body 21 (expansion portion) of the second cylinder 20 (FIG. 2). ) Is consistent. With this configuration, the movement of the second cylinder 20 into the first cylinder 10 (movement upward in FIG. 5) is restricted by the main body 11 of the first cylinder 10. Further, when the second cylinder 20 expands due to the heat of a fire, the main body 11 of the first cylinder 10 regulates the expansion of the second cylinder 20 in the axial direction (upward direction).

In the present embodiment, when the second cylinder 20 is fitted to the first cylinder 10, the second cylinder 20 is at a position where the lower end of the first cylinder 10 is in contact with the annular protrusion 28 of the second cylinder 20. Is stopped from being fitted into the first cylinder body 10. When the second cylinder 20 has the second cylinder 20 fitted to the first cylinder 10, the inner peripheral surface 15a (FIG. 5) of the stepped portion 15 of the first cylinder 10 and the main body of the second cylinder 20 The gap L between the upper end 22 of the portion 21 is
0 <L ≦ (length of first cylinder 10/2) ・ ・ ・ Equation (3)
Is. If the gap L is large, the second cylinder 20 expands in the direction on the floor and the upward expansion is hindered. However, if the above equation (3) is satisfied, the partition through hole 7 due to the expansion of the second cylinder 20 The blocking effect of is more exerted.

Further, preferably, with the second cylinder 20 fitted to the first cylinder 10, the inner peripheral surface 19 of the enlarged diameter portion 16 of the first cylinder 10 and the outer peripheral surface of the main body 21 of the second cylinder 20 24 come into contact. With this configuration, the adhesion between the first cylinder 10 and the second cylinder 20 in the event of a fire is enhanced, the intrusion of fire between the first cylinder 10 and the second cylinder 20 is suppressed, and the fire resistance is improved. To do.

Further, it is more preferable to form the annular protrusion 28 on at least one of the inner peripheral surface 19 of the enlarged diameter portion 16 of the first cylinder 10 or the outer peripheral surface 24 of the main body 21 of the second cylinder 20. As a result, the contact resistance between the inner peripheral surface 19 of the enlarged diameter portion 16 of the first tubular body 10 and the outer peripheral surface 24 of the main body portion 21 of the second tubular body 20 increases, and one of the tubular bodies 10 and 20 with respect to the other. It is prevented from falling off.

Further, in a state where the second cylinder 20 is fitted to the first cylinder 10, the hollow portion 6 (FIGS. 2 and 5) is formed by connecting the inside 10a of the first cylinder 10 and the inside 20a of the second cylinder 20. ) Is configured, and the hollow portion 6 functions as a partition through hole 7 (FIG. 2) of the floor or wall. The size of the hollow portion 6 (section through hole 7) is larger than the outer diameter of the pipe or wiring 8 and is a dimension through which the pipe or wiring 8 can be inserted. The pipes include various pipes such as water pipes, refrigerant pipes, heat medium pipes, gas pipes, and intake / exhaust pipes. The wiring 8 includes various cables such as a power cable and a communication cable.

As shown in FIG. 2, the non-expanding portion 30 and the fixture 40 are placed inside the first cylinder 10 a so as to close the gap between the inner peripheral surface 14 of the first cylinder 10 and the pipe or the wiring 8. It is arranged and is located inside the extension surface 250 which is an extension of the inner peripheral surface 25 of the second cylinder 20 (expansion portion).

The non-tension portion 30 is formed of a non-flammable or flame-retardant non-expandable substance. The non-flammable or flame-retardant non-expandable substance is, for example, an inorganic material such as glass wool or rock wool, or a non-flammable urethane, PTFE-based, polyvinyl chloride-based, or phenol resin-based compound.

The fixture 40 is attached to the upper end of the inside 10a of the first cylinder 10, that is, the end of the inside 10a of the first cylinder 10 on the side opposite to the second cylinder 20. The fixture 40 has a tubular shape, and a pipe or a wiring 8 is inserted into a hole 41 in the center thereof. The fixture 40 may be made of metal or may be made of a non-refractory or refractory resin composition. Preferably, the fixture 40 is formed from a non-flammable or flame-retardant material. The nonflammable or flame retardant material includes, for example, metals such as steel, copper and stainless steel, non-thermally expandable fireproof resin materials such as acrylic resin, epoxy resin, polypropylene resin, vinyl chloride and butyl rubber, and bromine compounds. , A non-thermally expandable fire-resistant resin material containing a flame retardant such as a phosphorus compound, a chlorine compound, an antimony compound, a metal hydroxide, a nitrogen compound, and a boron compound, and a non-fire resistant resin composition. Further, the fixture 40 may be further subjected to a finishing layer such as a coating or coloring so as to give an aesthetic appearance.

Next, a method of constructing a fireproof filling structure using the sleeve 1 will be described with reference to FIG.

First, as shown in FIG. 6A, the sleeve 1 is fixed to the floor base 101. The sleeve 1 is fixed to the floor base 101, for example, by screwing the bolt 29 into the floor base 101 through the hole 27a of the mounting portion 27 at the lower end 23 of the second tubular body 20. A hole for inserting a pipe or wiring 8 (see FIG. 6C) is made at a position corresponding to the sleeve 1 on the bottom of the mold 102.

Next, as shown in FIG. 6B, the concrete 5 is poured into the floor base 101. In the example of FIG. 6B, the thickness, that is, the height H of the concrete 5, is equal to the distance from the upper end 12 of the first cylinder 10 to the lower end 23 of the second cylinder 20. In this way, concrete 5 is cast around the outer periphery of the sleeve 1, leaving the hollow portion 6 inside the sleeve 1, and the hollow portion 6 of the sleeve 1 acts as a partition through hole 7.

Next, as shown in FIG. 6C, one or a plurality of pipes or wirings 8 are provided through the compartment through holes 7 so as to penetrate the concrete 5, and the non-expandable portion 30 is arranged in the hollow portion 6. (Specifically, the non-expandable portion 30 is arranged inside the first cylinder 10 a). For the purpose of filling the gap between the sleeve 1 and the concrete 5, a filler is filled around the outside of the sleeve 1, and then the pipe or the wiring 8 is passed through the inside of the sleeve 1 (hollow portion 6). You may do so.

Next, as shown in FIG. 6D, a fixture 40 is attached to the upper end of the inner portion 10a of the first tubular body 10 so as to cover the periphery of the pipe or the wiring 8 and close the section through hole 7. .. It is preferable that the fixture 40 closes more gaps in the compartment through hole 7. As described above, the fireproof filling structure 50 is completed.

When a fire breaks out in the direction of the arrow in FIG. 6D downstairs of the refractory filling structure 50, the main body 21 of the second cylinder 20 thermally expands as shown in FIG. At this time, as shown in FIG. 2, the inner peripheral surface 14 of the main body portion 11 (non-expanding portion) of the first tubular body 10 becomes an extension surface 250 which is an extension of the inner peripheral surface 25 of the second tubular body 20. The upward expansion of the second tubular body 20 is restricted by the fact that they match and that the non-expanding portion 30 and the fixture 40 are located inside the extension surface 250. Therefore, the expansion of the second cylinder 20 in the direction perpendicular to the axial direction of the second cylinder 20, particularly perpendicular to the axial direction and inward of the second cylinder 20, is promoted. Therefore, it is not necessary to increase the amount of the refractory resin material of the heat-expandable portion (main body 21 of the second cylinder 20) constituting the sleeve 1, and the heat-expandable portion (main body 21 of the second cylinder 20). The section through hole 7 can be reliably closed by the thermal expansion of. Therefore, the partition through hole 7 can be reliably closed while the material cost of the sleeve 1 is kept low.

Further, since the gap between the sleeve 1 and the pipe or the wiring 8 is filled by the non-expandable portion 30 and the fixture 40, the partition through hole does not cause anxiety to the user's psychology when a fire does not occur. Sound leakage, water leakage, and smoke leakage through the 7 (hollow portion 6) can be prevented.

Further, since the non-expandable portion 30 and the fixture 40 are located only inside 10a of the first tubular body 10, the non-expandable portion 30 and the fixture 40 are arranged so as not to come into contact with the second tubular body 20. It becomes. As a result, in the event of a fire, the non-expanding portion 30 and the fixture 40 do not interfere with the expansion of the second tubular body 20, so that the partition through hole 7 can be reliably closed by the expansion of the second tubular body 20. Further, since the non-expandable portion 30 is arranged inside the first tubular body 10 a, the upper end 22 of the second tubular body 20 expands and comes into contact with the non-expandable portion 30 in the event of a fire, and the first The upward expansion of the second tubular body 20 into the tubular body 10, particularly the upward expansion of the second tubular body 20 inward of the stepped portion 15 is restricted. As a result, the expansion of the second cylinder 20 in the direction perpendicular to the axial direction of the second cylinder 20, particularly perpendicular to the axial direction and inward of the second cylinder 20, is surely promoted, and the compartment is divided. The through hole 7 can be closed more effectively. In addition, in order to make the closure of the section through hole 7 more reliable, it is preferable to arrange the non-expanding portion 30 in the range of 20% to 100% of the inside 10a of the first tubular body 10.

Further, since the fixture 40 closes the gap between the sleeve 1 and the pipe or the wiring 8, when the partition penetrating structure 50 is viewed from above, the inside of the partition penetrating hole 7 cannot be seen and is visually recognized. The aesthetic appearance is also maintained.

The present invention is not limited to the above embodiment, and can be modified as follows.

For example, the annular protrusion 28 may be omitted. Also in this case, if the inner diameter A of the main body 11 of the first cylinder 10 is equal to or smaller than the inner diameter B of the main body 21 of the second cylinder 20, the second cylinder 20 is fitted into the first cylinder 10. At that time, the upper end 22 of the second cylinder 20 comes into contact with the inner peripheral surface 15a of the stepped portion 15 of the first cylinder 10, so that the movement of the second cylinder 20 into the first cylinder 10 can be restricted. ..

Further, at least one of the main body portion 11, the step portion 15, and the diameter-expanded portion 16 of the first tubular body 10 may be formed of a heat-expandable material. In particular, the main body 11 of the first tubular body 10 may be formed of a material having a lower expansion ratio during heating than the main body 21 of the second tubular body 20. That is, as shown in the following formula (4), the ratio of the expansion ratios of the main body 11 of the first cylinder and the main body 21 of the second cylinder 20 may be 0 or more and less than 1.
0 ≦ (Expansion ratio of the first cylinder / Expansion ratio of the second cylinder) <1 ... Equation (4)

Further, in the refractory filling structure of the present invention, in addition to the sleeve 1 and the fixture 40, any known refractory filler, refractory resin composition, refractory sheet, or refractory is used in order to improve the refractory. A metal plate or the like may be further used.

Further, in the above embodiment, when the concrete 5 is cast in FIG. 6B, the concrete 5 is poured to the same height as the sleeve 1, but the height of the sleeve 1 is visible so that the upper end portion of the sleeve 1 can be visually recognized. The first tubular body 10 having a height higher than the floor thickness may be used, or the height of the concrete 5 may be lower than the height of the sleeve 1.

Further, for the purpose of adjusting the height of the sleeve 1, the sleeve 1 is fitted to the inside 10a or / of the first cylinder 10 and the inside 20a of the second cylinder 20 to fit the sleeve 1 into 3. It may be composed of one or more cylinders.

Further, in the above embodiment, assuming that the cross section of the compartment through hole 7 is circular, an example is shown in which the sleeve 1 is an annular protrusion having a substantially circular cross section, but the shape of the sleeve 1 is the compartment through hole 7. If the compartment through hole 7 has a substantially elliptical cross section, the sleeve 1 may be an annular protrusion having a substantially elliptical cross section, or if the compartment through hole 7 has a substantially elliptical cross section, the sleeve may have a substantially elliptical cross section. 1 may be formed so as to be an annular protrusion having a rectangular cross section.

If it can be confirmed that there is no problem in practical durability such as fire resistance, sound insulation, and water leakage, one of the non-expandable portion 30 and the fixture 40 shown in FIG. 2 is omitted, and the non-expandable portion 30 and the fixture 40 are omitted. Only the other end of the fixture 40 may be arranged inside the first cylinder 10 so as to close the gap between the inner peripheral surface 14 of the first cylinder 10 and the pipe or the wiring 8. Alternatively, the non-expandable portion 30 and / or the fixture 40 is arranged inside the second cylinder 20 so as to close the gap between the inner peripheral surface 25 of the second cylinder 20 and the pipe or the wiring 8. You may. Further, a lid member, a cover member, or a cap other than the fixture 40 may be used.

The sleeve of the present invention can also be modified as shown in FIG. The sleeve 2 shown in FIG. 8 uses a tubular fixing tool 42 instead of the non-expanding portion 30 and the fixing tool 40 shown in FIG. 2 (the fixing tool 42 is more than the fixing tool 40 shown in FIG. 2). However, the height is large). Like the fixture 40 shown in FIG. 2, the fixture 42 is formed of a non-flammable or flame-retardant non-expandable substance, and is between the inner peripheral surface 14 of the first cylinder 10 and the pipe or wiring 8. It is arranged inside 10a of the first tubular body 10 so as to close the gap between the two. In the sleeve 2 shown in FIG. 8, the fixed frame 42 is located inside the extension surface 250 which is an extension of the inner peripheral surface 25 of the second tubular body 20, and the inner peripheral surface 14 of the first tubular body 10 is located. By matching with the extension surface 250, in the event of a fire, the upward expansion of the second cylinder 20 is restricted, and the second cylinder 20 in the direction perpendicular to the axial direction is the first. 2 The expansion of the cylinder 20 is promoted. Further, since the fixture 42 closes the gap between the sleeve 2 and the pipe or the wiring 8, when a fire does not occur, the user's psychological aspect is not disturbed, and sound leakage through the compartment through hole 7 or It can prevent water leakage and smoke leakage.

The sleeve of the present invention can also be modified as shown in FIG. The sleeve 3 shown in FIG. 9 uses a fixture 43 instead of the non-expandable portion 30 and the fixture 40 shown in FIG. Like the fixture 40 shown in FIG. 2, the fixture 43 is formed of a non-flammable or flame-retardant non-expandable substance, and has a substantially cylindrical main body portion 44 and an outer diameter larger than that of the main body portion. It has a small substantially cylindrical leg portion 45, and a hole 46 is formed through the center of the main body portion 44 and the leg portion 45. The fixture 43 is attached to the upper end of the sleeve 3 so that the pipe or wiring 8 is passed through the hole 46 and the leg 45 is inserted into the hollow portion 6, and the leg 45 is piped or piped with the sleeve 1. Close the gap with the wiring 8. In the sleeve 3 of FIG. 9, the leg portion 45 of the fixture 43 is located inside the extension surface 250 which is an extension of the inner peripheral surface 25 of the second tubular body 20, and the inner circumference of the first tubular body 10 is formed. Since the surface 14 coincides with the extension surface 250, the upward expansion of the second cylinder 20 is restricted in the event of a fire, and the direction perpendicular to the axial direction of the second cylinder 20 is restricted. The expansion of the second cylinder 20 to the surface is promoted. Further, when a fire does not occur, the leg portion 45 closes the gap between the sleeve 2 and the pipe or the wiring 8, so that the user's psychological aspect is not disturbed and the sound through the compartment through hole 7 is not disturbed. Leakage, water leakage and smoke leakage can be prevented.

In the sleeves 2 and 3 shown in FIGS. 8 and 9, the fixture 42 and the leg portion 45 of the fixture 43 are the first cylinders so that the partition through hole 7 is surely closed by the expansion of the second cylinder 20. It is preferably arranged in the range of 20% to 100% of the inside 10a of the body 10. Further, if the fixture 42 and the leg portion 45 of the fixture 43 are arranged inside the first cylinder 10 a as described above, the fixture 42 and the fixture 43 do not come into contact with the second cylinder 20. Therefore, it does not hinder the expansion of the second cylinder 20. Therefore, the expansion of the second tubular body 20 can surely close the compartment through hole 7.

Further, in the sleeves 1, 2 and 3 shown in FIGS. 2, 8 and 9, the extension surface 250 which is an extension of the inner peripheral surface 25 of the second tubular body 20 (expansion portion) and the non-expansion portion 30 or the fixture 40, The inner peripheral surfaces of 42 and 43 may be matched (FIG. 10 shows the sleeve 1 shown in FIG. 2 in which the extension surface 250 is changed to match the inner peripheral surfaces of the non-expanding portion 30 and the fixture 40. An example of what was done). Further, in the sleeves 1, 2 and 3 shown in FIGS. 2, 8 and 9, the inner peripheral surface 14 of the first cylinder 10 is inside the extension surface 250 which is an extension of the inner peripheral surface 25 of the second cylinder 21. Alternatively, it may be located on the outside. In this case, the distance d between the inner peripheral surface 14 of the first tubular body 10 and the extension surface 250 obtained by extending the inner peripheral surface 25 of the second tubular body 20 is the inner diameter B of the second tubular body 25. In the sleeve 1 shown in FIG. 2, the inner peripheral surface 14 of the first tubular body 10 is positioned outside the extension surface 250, and the inner peripheral surface 14 and the extension surface 250 are set to 5% or less (FIG. 11 shows the inner peripheral surface 14 and the extension surface 250). An example is shown in which the distance d between the two cylinders 25 is changed to 5% or less of the inner diameter B of the second cylinder 25). Even if the sleeves 1, 2 and 3 shown in FIGS. 2, 8 and 9 are changed as described above, the expansion of the second cylinder 20 in the upward direction is restricted and the axial direction of the second cylinder 20 is restricted. It is possible to promote the expansion of the second tubular body 20 in the direction perpendicular to the relative direction.

The sleeve of the present invention can also be modified as shown in FIG. The sleeve 4 shown in FIG. 12 is obtained by omitting the non-expanding portion 30 and the fixture 40 from the sleeve 1 shown in FIG. In this sleeve 4, the inner peripheral surface 14 of the first cylinder 10 coincides with the extension surface 250 which is an extension of the inner peripheral surface 25 of the second cylinder 20, so that the sleeve 4 can be moved upward in the event of a fire. The expansion of the second cylinder 20 is restricted, and the expansion of the second cylinder 20 in the direction perpendicular to the axial direction of the second cylinder 20 is promoted.

The sleeve of the present invention can also be modified as shown in FIG. The sleeve 100 shown in FIG. 13 includes a tubular body 70 and a tubular fixture 80.

The tubular body 70 includes a substantially cylindrical main body portion 71, an annular member 72 protruding from the lower end of the side surface of the main body portion 71, and one or a plurality of annular members extending outward perpendicular to the axis of the tubular body 70 from the annular member 72. It is provided with a mounting portion 73.

The main body 71 of the cylinder 70 functions as an expansion portion that thermally expands due to the heat of the fire, and is a heat-expandable refractory resin material like the main body 21 of the second cylinder 20 shown in the above embodiment. Formed from. The hollow portion 74 of the main body portion 71 acts as a partition through hole, and a pipe or wiring 8 is passed through the hollow portion 74 (partition through hole hole).

The annular member 72 and the mounting portion 73 have the same structure as the annular member 26 and the mounting portion 27 shown in the above embodiment, and the mounting portion 73 is used to fix the tubular body 70 to the floor base.

The fixture 80 has a tubular shape, and is inserted into the hollow portion 74 so as to close the gap between the inner peripheral surface 75 of the main body portion 71 of the tubular body 70 and the pipe or the wiring 8. The fixture 80 is made of a non-flammable or flame-retardant non-expandable material, similar to the fixture 40 shown in FIG.

According to the sleeve 100 shown in FIG. 13, the fixture 80 is located inside the inner peripheral surface 75 of the main body portion 71 (expansion portion) of the tubular body 70, so that in the event of a fire, the main body of the tubular body 70 The upward expansion of the portion 71 is restricted, and the expansion of the main body portion 71 in the direction perpendicular to the axial direction of the tubular body 70 is promoted. As a result, the hollow portion 74 (partition through hole) is closed. Further, when a fire does not occur, the fixture 80 closes the gap between the inner peripheral surface 75 of the tubular body 70 and the pipe or wiring 8 so as not to give anxiety to the user's psychological aspect, and the hollow portion 74 (section). Sound leakage, water leakage, and smoke leakage through the through hole) can be prevented.

Further, in the above embodiment, an example in which the sleeve 1 is installed from above the floor has been described, but the sleeves 1, 2, 3, 4, 100 shown in FIGS. 2, 8 to 13 can also be installed from below the floor. is there . Further, in the sleeves 1, 2, 3, 4, 100 shown in FIGS. 2, 8 to 13, the first cylinder 10 is arranged on the upper side of the second cylinder 20, but on the contrary, The first cylinder 10 may be arranged below the second cylinder 20.

Further, the sleeves 1, 2, 3, 4, 100 of the present invention include not only floors (including not only floors downstairs, which are relatively concrete flooring materials, but also ceiling floors), but also wall bodies such as side walls. It is also applicable to.

1,2,3,4,100 sleeves,
6,74 hollow part,
7 compartment through holes,
8 wiring,
10 1st cylinder,
10a Inside the first cylinder,
11 The main body of the first cylinder,
14 Inner peripheral surface of the first cylinder,
20 Second cylinder,
20a Inside the second cylinder,
21 Main body of the second cylinder,
25 Inner peripheral surface of the second cylinder,
30 non-expansion part,
40, 42, 43, 80 fixtures,
50 Fireproof filling structure,
70 cylinder,
71 The main body of the cylinder,
75 Inner peripheral surface of the cylinder,
82 Inner peripheral surface of the fixture,
250 An extension surface that extends the inner peripheral surface of the second cylinder

Claims (8)

A fireproof filling structure that is piped or wired using a sleeve to form a compartmentalized through hole in the floor or wall of a building.
The circumference of the sleeve comes into contact with the floor material or wall material constituting the floor or wall over substantially the entire length of the sleeve.
The sleeve
Non-expandable first cylinder and
Equipped with a heat-expandable second cylinder
The first cylinder and the second cylinder are aligned along their axial directions, and in this state, the inner peripheral surface of the first cylinder extends the inner peripheral surface of the second cylinder. The inner peripheral surface of the first cylinder is located inside or outside the extension surface of the extension of the inner peripheral surface of the second cylinder, and the first cylinder is aligned with the extension surface. A fireproof filling structure in which the distance between the inner peripheral surface of one cylinder and the extension surface extending the inner peripheral surface of the second cylinder is 5% or less of the inner diameter of the second cylinder. By aligning the first cylinder and the second cylinder along their axial directions, a hollow portion in which the inside of the first cylinder and the inside of the second cylinder are connected is formed. Then, the pipe or wiring is passed through the hollow portion, and the non-expandable portion or fixture having non-expansion is closed so as to close the gap between the wall surface of the hollow portion and the pipe or wiring. The fireproof filling structure according to claim 1, which is arranged in a hollow portion. The second aspect of the present invention, wherein the non-expanding portion or the fixture is arranged inside the first cylinder so as to close a gap between the inner peripheral surface of the first cylinder and the pipe or wiring. Fireproof filling structure to be done. The fireproof filling structure according to claim 2, wherein the non-expanding portion or the fixture is arranged so as not to come into contact with the second cylinder. The fireproof filling structure according to any one of claims 2 to 4, wherein the non-expandable portion or the fixture is formed of a nonflammable material or a flame retardant material. Claims 1 to 5 wherein the sleeve is composed of three or more cylinders by fitting another cylinder inside and / or inside the second cylinder. The fireproof filling structure according to any one. The method for constructing a refractory filling structure according to any one of claims 1 to 6.
The process of installing the sleeve on the floor base or wall base, and
The step of filling the outer periphery of the sleeve with a filler and
Construction method of fireproof filling structure including. The construction method according to claim 7, further comprising a step of passing a pipe or wiring through the sleeve after filling the filler.

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