JP6837736B2 - Through-hole cover and fireproof structure of compartment through-hole - Google Patents

Description

The present invention relates to a through-hole cover inserted into a through-hole of a compartment and a fireproof structure of a compartment through-hole provided with the through-hole cover.

Conventionally, as a method of constructing a section penetration part of a house wall, a through hole cover made of a fireproof material is installed in the penetration part, and electrical wiring and piping are penetrated inside the through hole cover to perform fireproof treatment of the section penetration part. The method of applying is being carried out. For example, Patent Document 1 discloses a method of using a metal sleeve as the through-hole cover. In Patent Document 1, a sleeve of a steel conduit is pierced through a through hole of a compartment, and wiring and piping are inserted inside the sleeve. Then, the fireproof putty closes the space between the inner peripheral surface of the sleeve and the outer surface of the wiring or piping.

Japanese Unexamined Patent Publication No. 2014-137085

However, as in Patent Document 1, the work of burying the fireproof putty between the sleeve and the wiring or piping is complicated, and when the through hole of the compartment is formed in the corner of the room or near the ceiling, the fireproof putty is used. The work of filling the ceiling becomes difficult, and a great burden is required. Further, in recent years, the aging of workers has progressed, and the heavy metal sleeves place a heavy burden on elderly workers to carry the sleeves to the construction position.

The present invention has been made to solve the above problems, and an object of the present invention is a through-hole cover capable of easily realizing fireproof treatment of a partition through hole, and a fireproof structure of a partition through hole provided with the through hole cover. Is to provide.

The through-hole cover according to the first aspect of the present invention is a through-hole cover that is inserted into a through-hole of a compartment, has a tubular shape, and has a main body into which wiring or piping is inserted and a main body in the longitudinal direction of the main body. A fin portion provided inside the main body at a predetermined position is provided, and the fin portion is composed of a plurality of projecting pieces arranged in the circumferential direction of the inner peripheral surface of the main body, and the plurality of projecting pieces are the main body. The wiring or the piping is surrounded by the tips of the plurality of projecting pieces, and the main body and the plurality of projecting pieces constituting the fin portion are formed on each other. Has thermal expandability.

Preferably, the main body and the plurality of projecting pieces constituting the fin portion are formed of a heat-expandable resin material.

Preferably, a plurality of the fin portions are provided at intervals in the longitudinal direction of the main body.

Preferably, a flange portion that projects outward from the diameter of the main body is provided at a predetermined position in the longitudinal direction of the main body, and the flange portion is formed of a heat-expandable resin material.

Preferably, the flange portion is provided at one end of the main body in the longitudinal direction. Alternatively, the flange portion is provided at an intermediate position in the longitudinal direction of the main body, and is one of a range on one end side and a range on the other end side in the longitudinal direction of the main body with the flange portion as a boundary. The length of is longer than the length of the other range.

Preferably, the main body is formed with a notch extending from one end to the other end in the longitudinal direction, and the notch is continuous with the gap between two adjacent protruding pieces in the circumferential direction of the main body. The main body is in a substantially half-divided state.

Preferably, the plurality of projecting pieces constituting each of the fin portions are arranged in the circumferential direction of the inner peripheral surface of the main body through a gap extending radially from the center of the main body, and are arranged in the longitudinal direction of the main body. In a side view viewed from one end or the other end, the radial gap in one fin portion does not overlap with the radial gap in the other fin portion.

The fireproof structure according to the second aspect of the present invention includes a through-hole cover according to the first aspect and a compartment having a through-hole, and the main body of the through-hole cover is inserted into the through-hole to form the through-hole. Wiring or piping is inserted into the main body of the cover.

Preferably, the main body is arranged over the entire width of the through hole so that the length of the main body matches the width of the through hole.

According to the present invention, since the main body and the fin portion of the through-hole cover have thermal expansion property, fireproof treatment can be realized by a simple operation of inserting the through-hole cover into the through-hole of the compartment. Therefore, the complicated work of filling the refractory putty is not required. Therefore, fireproof treatment of the compartment through hole can be easily realized.

It is sectional drawing which shows the fire protection structure which concerns on 1st Embodiment of this invention. It is a perspective view which shows the through hole cover which concerns on 1st Embodiment of this invention. It is a perspective view which shows the through hole cover which concerns on 1st Embodiment of this invention. It is a front view which shows the through hole cover which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the procedure of constructing the fire protection structure which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the procedure of constructing the fire protection structure which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the modification of the fire protection structure which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the fire protection structure which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the through hole cover which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the procedure of constructing the fire protection structure which concerns on 2nd Embodiment of this invention.

Hereinafter, the first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a fireproof structure 10 according to the first embodiment of the present invention. 2 and 3 are perspective views showing the through-hole cover 1 according to the first embodiment. FIG. 4 is a front view showing the through hole cover 1 according to the first embodiment. FIG. 4A is a view seen from one end of the through hole cover 1 in the longitudinal direction, and FIG. 4B is a view seen from the other end of the through hole cover 1 in the longitudinal direction.

As shown in FIG. 1, the fireproof structure 10 includes a compartment 11 and a through-hole cover 1. The compartment 11 is a wall of a building extending in the vertical direction, and partitions fire protection compartments A and B. The structure of the wall as the compartment 11 is not particularly limited, and for example, in addition to the reinforced concrete structure (RC) and the lightweight aerated concrete structure (ALC), although not shown, a wooden or steel stud is sandwiched. A partition wall (hollow wall) in which gypsum boards are fixed on both sides can be mentioned. A through hole 12 is formed in the compartment 11 to communicate the fire protection compartments A and B. When the wall is a partition wall (hollow wall), a through hole 12 is formed in each gypsum board. The cross section of the through hole 12 is formed into various shapes such as a circular shape and a rectangular shape.

The through-hole cover 1 is inserted into the through-hole 12 in order to prevent the propagation of fire through the through-hole 12. The through-hole cover 1 includes a main body 2, a flange portion 3, and fin portions 4a and 4b. The main body 2 has a tubular shape corresponding to the cross section of the through hole 12, and is inserted into the through hole 12 (because the cross section of the through hole 12 is circular, the main body 2 is cylindrical in the illustrated example. Is presented). The main body 2 is arranged over the entire width of the through hole 12 so that its length matches the width of the through hole 12 (FIG. 1). Wiring 5 or piping is inserted inside the main body 2. The wiring 5 is, for example, an electric wire or an optical fiber cable. The pipes are, for example, water pipes, water supply pipes, drainage pipes, and refrigerant pipes.

The flange portion 3 is provided at one end of the main body 2 in the longitudinal direction, and projects outward from the diameter of the main body 2. The flange portion 3 has a disk shape having a predetermined thickness, and its outer shape is larger than the outer shape of the through hole 12 of the compartment 11. The flange portion 3 does not necessarily have to have a circular outer shape, and may be a polygon such as a quadrangle or a hexagon (preferably a regular polygon). As shown in FIG. 1, the flange portion 3 is located outside the through hole 12 and is along the wall surface of the compartment 11. The through-hole cover 1 can be fixed to the compartment 11 by fixing the flange portion 3 to the wall surface of the compartment 11 using an adhesive, an adhesive, an adhesive tape, or other fixing tool such as a screw.

The fin portion 4a is provided inside one end of the main body 2 in the longitudinal direction. The fin portion 4b is provided inside the other end of the main body 2 in the longitudinal direction. As shown in FIG. 2, the fin portion 4a is composed of projecting pieces 6a to 6h, and the fin portion 4b is composed of projecting pieces 6i to 6p. The protruding pieces 6a to 6h and the protruding pieces 6i to 6p are arranged in the circumferential direction of the inner peripheral surface of the main body 2 through the radial gap 7. Each of the projecting pieces 6 projects inward in diameter from the inner peripheral surface of the main body 2. Since the gap 7 extends radially from the center of the main body 2, the protruding pieces 6a to 6h and the protruding pieces 6i to 6p project substantially in a triangular shape toward the center of the main body 2 (intersection of the gap 7), and the fins. The portion 4a (protruding pieces 6a to 6h) and the fin portion 4b (protruding pieces 6i to 6p) close almost the entire cross section of the main body 2 (the range of the cross section excluding the gap 7).

As shown in FIG. 4, the gap 7 in the fin portion 4a and the gap 7 in the fin portion 4b are used for the purpose of improving the airtightness in the main body 2 and blocking the passage of light in the main body 2. It is formed so as not to overlap in a side view (in FIG. 4A, the gap 7 of the fin portion 4a is shown by a solid line, and the gap 7 of the fin portion 4b is shown by a broken line. In FIG. 4B, the fin portion is shown. The gap 7 of 4b is shown by a solid line, and the gap 7 of the fin portion 4a is shown by a broken line). The above-mentioned side view is a view in which the main body 2 is viewed from one end or the other end in the longitudinal direction of the main body 2. More specifically, the range of the gap 7 of the fin portions 4a and 4b that do not overlap in the side view is the range excluding the intersection of the gap 7, and the intersection of the fin portion 4a and the gap 7 of the fin portion 4b is the main body 2. Because it is in the center of, it overlaps in the side view. The intersection of the fin portion 4a and the gap 7 of the fin portion 4b is a range surrounded by the tips of the protruding pieces 6a to 6h and the tips of the protruding pieces 6i to 6p, and the wiring 5 and the pipe are passed through this range. In the illustrated example, the tips of the protruding pieces 6a to 6h and the protruding pieces 6i to 6p have a sharp shape, but the shapes of the tips of the protruding pieces 6a to 6h and the protruding pieces 6i to 6p are the wiring 5 and the piping. It may have a rounded shape corresponding to the outer shape of.

As shown in FIG. 2, a notch 8 extending from one end to the other end in the longitudinal direction is formed in the main body 2, and one gap 7 in the fin portions 4a and 4b is continuous with the notch 8. That is, in the fin portion 4a, the gap 7a between the adjacent protruding pieces 6d and the protruding pieces 6e is continuous with one end 8a of the notch 8 (the flange portion 3 is formed with a notch 8a extending in the radial direction). , One end of the notch 8 is formed by the notch 8a, and the gap 7a is continuous with the notch 8a). Further, in the fin portion 4b, the gap 7b between the adjacent protruding pieces 6l and the protruding pieces 6m is continuous with the other end 8b of the notch 8. By making the gaps 7a and 7b continuous with the notch 8 in this way, the through hole cover 1 is in a substantially half-split state, and as shown in FIG. 3, a force that opens one side and the other side of the half-split. By adding F, the width of the notch 8 and the gaps 7a and 7b can be widened.

The main body 2, the flange portion 3, and the fin portions 4a and 4b described above are all formed of a heat-expandable refractory resin material containing a heat-expandable layered inorganic substance and an inorganic filler as resin components. It is preferable that the flange portion 3 and the fin portions 4a and 4b are integrally molded with the main body 2, but the flange portion 3 and the fin portions 4a and 4b are formed separately from the main body 2 to form an adhesive, an adhesive or the like. It may be retrofitted to the main body 2 by using it. When the flange portion 3 is formed separately from the main body 2, the flange portion 3 does not necessarily have to have thermal expansion property, but preferably has fire resistance.

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

Examples of the thermosetting resin include polyurethane, polyisocyanate, 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-vulverable 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 flexible and rubber-like properties are preferable. Those having such properties can be highly filled with an inorganic filler, and the obtained resin composition becomes flexible and easy to handle. In order to obtain a more flexible and easy-to-handle resin composition, a non-vulcanized rubber such as butyl or a polyethylene-based resin is preferably used. Instead, an epoxy resin is preferable from the viewpoint of increasing the flame retardancy of the resin itself and improving the fireproof performance.

The heat-expandable layered inorganic material expands when heated, but the heat-expandable layered inorganic material 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. The particle size of the heat-expandable graphite is preferably 20 to 200 mesh. When the particle size is larger than 200 mesh, the degree of expansion of graphite is sufficient to obtain the expanded heat insulating layer, and when the particle size is smaller than 20 mesh, the dispersibility when blended with the resin is good and the physical properties are good. Examples of commercially available products of heat-expandable graphite include "GREP-EG" manufactured by Tosoh Corporation and "GRAFGUARD" manufactured by GRAFTECH.

When the expanded heat insulating layer is formed, the inorganic filler increases the heat capacity and suppresses heat transfer, and also acts as an aggregate to improve the strength of the expanded heat insulating layer. The inorganic filler is not particularly limited, and for example, metal oxides such as alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, and ferrites; calcium hydroxide, magnesium hydroxide. , Hydroinorganic 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, sericite, glass fiber, glass beads, silica-based balun, aluminum nitride, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, carbon balun, charcoal powder, various metal powders, potassium titanate, magnesium sulfate " MOS ”(trade name), lead zirconate titanate, zinc stearate, calcium stearate, aluminum borate, molybdenum sulfide, silicon carbide, stainless fiber, zinc borate, various magnetic powders, slag fibers, fly ash, dehydrated sludge, etc. Can be mentioned. These inorganic fillers may be used alone or in combination of two or more.

The particle size of the inorganic filler is preferably 0.5 to 100 μm, more preferably 1 to 50 μm. When the amount of the inorganic filler added is small, the dispersibility greatly affects the performance, so that the inorganic filler has a small particle size, but when it is 0.5 μm or more, the dispersibility is good. When the amount added is large, the viscosity of the resin composition increases and the moldability decreases as the high filling progresses, but the viscosity of the resin composition can be decreased by increasing the particle size. A large diameter is preferable, but a particle size of 100 μm or less is desirable from the viewpoint of the surface properties of the molded product and the mechanical properties of the resin composition.

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

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 phosphoric acid esters such as red phosphorus; triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresil diphenyl phosphate, xylenyl diphenyl phosphate; sodium phosphate, Metal phosphates such as potassium phosphate and magnesium phosphate; ammonium polyphosphates; compounds represented by the following chemical formula (1) can be mentioned. Of these, red phosphorus, ammonium polyphosphate, and the compound represented by the following chemical formula (1) are preferable from the viewpoint of fire prevention performance, and ammonium polyphosphate is more preferable from the viewpoint of performance, safety, cost, and the like. ..

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

As the red phosphorus, commercially available red phosphorus can be used, but from the viewpoint of moisture resistance and safety such as not spontaneously igniting during kneading, those in which the surface of the red phosphorus particles is coated with a resin are preferably used. 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, propylphosphonate, butylphosphonic acid, 2-methylpropylphosphonate, t- Butylphosphonic acid, 2,3-dimethyl-butylphosphonate, octylphosphonate, phenylphosphonic acid, dioctylphenylphosphonate, dimethylphosphonate, methylethylphosphonate, methylpropylphosphinic acid, diethylphosphonate, dioctylphosphonate, phenylphosphine Examples thereof include acids, diethylphenylphosphonates, diphenylphosphonates, and bis (4-methoxyphenyl) phosphonates. 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.

The resin composition contains 10 to 350 parts by weight of the thermally expandable layered inorganic substance and 30 to 400 parts by weight of the inorganic filler with respect to 100 parts by weight of the resin component such as the thermoplastic resin or the epoxy resin. Is preferable.

The total amount of the thermally 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.

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 to obtain a required coefficient of thermal expansion, and after expansion, a residue having a predetermined heat insulating performance and a predetermined strength is formed. It is also possible to achieve stable fire protection performance.

When the total amount of the thermally expandable layered inorganic substance and the inorganic filler in the resin composition is 50 parts by weight or more, sufficient fire resistance is obtained by satisfying the residual amount after combustion, and when it is 600 parts by weight or less, it is mechanical. Physical characteristics are maintained.

Further, the resin composition used in the present invention is, if necessary, an antioxidant such as a phenol-based, amine-based, or sulfur-based antioxidant, a metal damage inhibitor, and an antistatic agent, as long as the object of the present invention is not impaired. Additives such as inhibitors, stabilizers, cross-linking agents, lubricants, softeners, pigments, tackifier resins, molding aids, and tackifiers such as polybutene and petroleum resins can be included.

The heat-expandable fire-resistant material is available as a commercial product. For example, a fire barrier manufactured by Sumitomo 3M Co., Ltd. (a heat-expandable fire-resistant material composed of a resin composition containing chloropurene rubber and vermiculite, expansion coefficient: 3 times, thermal conductivity Rate: 0.20 kcal / m · h · ° C), Mitsui Kinzoku Paint Co., Ltd.'s Medihicut (coefficient of thermal expansion consisting of a resin composition containing polyurethane resin and heat-expandable graphite, coefficient of expansion: 4 times, thermal conductivity : 0.21 kcal / m · h · ° C), thermal expansion fireproof 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 the expansion layer has strength, but the heating condition is 50 kW / m2. It is preferable that the volume expansion coefficient after heating for 30 minutes 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.

FIG. 5 is a cross-sectional view showing a procedure for constructing the fireproof structure 10. The fireproof structure 10 described above is constructed by sequentially executing the following operations (A) to (E).

(A) A through hole 12 is formed in the compartment 11.
(B) As shown in FIG. 5A, the wiring 5 or the pipe is passed through the through hole 12 of the compartment 11.
(C) As shown in FIG. 5 (b), the through hole cover 1 covers the range of the wiring 5 or the pipe extending to the outside of the through hole 12. At this time, the orientation of the through hole cover 1 is adjusted so that the flange portion 3 is located on the opposite side of the compartment 11. Further, as shown in FIG. 3, the width of the notch 8 of the through hole cover 1 is widened, and the wiring 5 or the pipe is inserted from the notch 8 into the inside of the main body 2 and surrounded by the tips of the protruding pieces 6 of the fin portions 4a and 4b. It is positioned within the range (intersection of gap 7).
(D) As shown in FIG. 5 (c), the through hole cover 1 is slid along the wiring 5 or the pipe, the main body 2 is inserted into the through hole 12, and the flange portion 3 is placed on the wall surface of the compartment 11. Follow. As a result, the main body 2 is arranged in the through hole 12, and the wiring 5 or the pipe is inserted inside the main body 2.
(E) The through-hole cover 1 is fixed to the compartment 11 by fixing the flange portion 3 to the wall surface of the compartment 11 with an adhesive, an adhesive, an adhesive tape, a screw, or the like.

FIG. 6 is a cross-sectional view showing another procedure for constructing the fire protection structure 10. The fire protection structure 10 can also be constructed by sequentially executing the following steps (F) to (I).

(F) A through hole 12 is formed in the compartment 11.
(G) As shown in FIG. 6A, the main body 2 of the through hole cover 1 is inserted into the through hole 12. At this time, the flange portion 3 is inserted into the through hole 12 from the other end side of the main body 2 not provided with the flange portion 3, and the flange portion 3 is aligned with the wall surface of the compartment 11.
(H) As shown in FIG. 6B, the wiring 5 or the pipe is inserted into the main body 2. At this time, the wiring 5 or the pipe is passed through the range (intersection of the gap 7) surrounded by the tips of the protruding pieces 6 of the fin portions 4a and 4b.
(I) The through-hole cover 1 is fixed to the compartment 11 by fixing the flange portion 3 to the wall surface of the compartment 11 with an adhesive, an adhesive, an adhesive tape, a screw, or the like.

When the fire prevention structure 10 is constructed by the above procedure and a fire occurs in either of the fire prevention sections A and B, the heat of the fire transmitted through the through hole 12 causes the through hole cover 1 (main body 2). The fin portions 4a and 4b and the flange portion 3) expand. Then, since the expanded through-hole cover 1 closes the gap of the through-hole 12, the fire is prevented from propagating to the other section.

According to the present embodiment, since the main body 2, the flange portion 3, and the fin portions 4a and 4b have thermal expansion properties, the fireproof treatment can be realized by a simple operation of inserting the through hole cover 1 into the through hole 12. Therefore, the complicated work of filling the refractory putty is not required. Further, since the main body 2, the flange portion 3, and the fin portions 4a and 4b are formed of the resin material, the weight of the through hole cover 1 is light. Therefore, it is easy to carry the through hole cover 1 to the construction position and to insert the through hole cover 1 into the through hole 12. From the above, the fireproof treatment of the through hole 12 can be easily realized.

Further, since the plurality of fin portions 4 are provided at intervals in the longitudinal direction of the main body 2, the fin portions 4 can support the wiring 5 and the like in a stretched state.

Further, by aligning the flange portion 3 provided at one end of the main body 2 along the wall surface of the compartment 11, it is possible to prevent the through hole cover 1 from entering the depth of the through hole 12.

Further, in the side view viewed from one end or the other end in the longitudinal direction of the main body 2, the gap 7 of the fin portion 4a and the gap 7 of the fin portion 4b do not overlap, so that the fire prevention section A is passed through the through hole cover 1. , B can be prevented from leaking light from one to the other. Further, the airtightness inside the through hole cover 1 can be improved, and the fire can be prevented from passing through the through hole cover 1.

Further, since the through hole cover 1 is in a substantially half-divided state, even in a situation where the wiring 5 or the pipe is already inserted into the through hole 12 of the compartment 11 as shown in FIG. 5A, the main body is used. 2 can be arranged in the through hole 12 so that the wiring 5 or the pipe is inserted inside the main body 2 (FIG. 5 (c)).

Note that FIG. 1 shows an example in which the through-hole cover 1 is arranged over the entire width of the through-hole 12 by matching the length of the main body 2 with the width of the through-hole 12 of the compartment 11. The length of the through hole 12 may be shorter than the width of the through hole 12. In this case, the metal sleeve may be arranged in the range of the through hole 12 in which the through hole cover 1 is not arranged. Alternatively, as shown in FIG. 7, the main bodies 2 and 2 of the two through hole covers 1 and 1 are inserted into the through holes 12 from both sides of the through hole 12, and the wiring 5 or the pipe is inserted into the main bodies 2 and 2. You may.

FIG. 8 is a cross-sectional view showing the fire protection structure 20 according to the second embodiment. FIG. 9 is a perspective view showing the through hole cover 30 according to the second embodiment. Hereinafter, the second embodiment of the present invention will be described with reference to these figures. In the following, the points different from those of the first embodiment will be mainly described, the points common to the first embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted.

The fireproof structure 20 according to the second embodiment includes a compartment 21 and a through hole cover 30. The compartment 21 is a double wall in which gypsum boards 22 and 22 are fixed on both sides, and extends in the vertical direction. Each gypsum board 22 is formed with a through hole 23 for communicating the fireproof compartments A and B.

The through-hole cover 30 includes a main body 2, a flange portion 3, and fin portions 4c, 4d, and 4e, which are formed of the above-mentioned heat-expandable refractory resin material. The flange portion 3 may not have thermal expansion property.

In the through-hole cover 30 according to the second embodiment, a flange portion 3 protruding outward from the diameter of the main body 2 is formed at an intermediate position in the longitudinal direction of the main body 2, and the length of the main body 2 with the flange portion 3 as a boundary. Of the range 2a on one end side and the range 2b on the other end side in the direction, the length of the range 2a on the one end side is longer than the length of the range 2b on the other end side. A fin portion 4c and a fin portion 4d are provided inside the one end side range 2a of the main body 2. A fin portion 4e is provided inside the other end side range 2b of the main body 2. In these fin portions 4c, 4d, 4e, six protruding pieces 6 are arranged in the circumferential direction of the inner peripheral surface of the main body 2 through the radial gap 7, and each of the protruding pieces 6 is the inner circumference of the main body 2. It protrudes inward from the surface. Further, in the side view viewed from one end or the other end in the longitudinal direction of the main body 2, the gap 7 in one fin portion 4 is formed so as not to overlap with the gap 7 in the other fin portion 4.

As shown in FIG. 8, the other end side range 2b of the main body 2 is inserted into one through hole 23 of the gypsum boards 22 and 22, and the one end side range 2a of the main body 2 extends to the outside of the compartment 21. .. Then, the wiring 5 or the pipe is inserted into the main body 2, and the periphery of the wiring 5 or the pipe is surrounded by the tip of the protruding piece 6 of the fin portions 4c, 4d, 4e.

FIG. 10 is a cross-sectional view showing another procedure for constructing the fire protection structure 20. The fire protection structure 20 is constructed by sequentially executing the following steps (J) to (M).
(J) A through hole 23 is formed in the compartment 21.
(K) As shown in FIG. 10A, the other end side range 2b of the main body 2 is inserted into the through hole 23 of the compartment 21 from one of the fire protection compartments A and B (from the fire protection compartment A in the illustrated example). Then, the flange portion 3 is placed along the wall surface of the compartment 21.
(L) As shown in FIG. 10B, the wiring 5 or the pipe is inserted into the main body 2 from one of the fire protection compartments A and B (from the fire protection compartment A in the illustrated example). At this time, the wiring 5 or the pipe is passed through the range (intersection of the gap 7) surrounded by the tips of the protruding pieces 6 of the fin portions 4c, 4d, 4e.
(M) The through-hole cover 30 is fixed to the compartment 21 by fixing the flange portion 3 to the wall surface of the compartment 21 using an adhesive, an adhesive, an adhesive tape, a screw, or the like.

Although not shown, in the second embodiment as well, a notch extending from one end to the other end in the longitudinal direction is formed in the main body 2 of the through hole cover 30, and one gap of the fin portions 4c, 4d, 4e is formed in this notch. By making 7 continuous, the through-hole cover 30 may be in a substantially half-split state. In this case, the fire protection structure 20 can be constructed by sequentially executing the following steps (N) to (R).

(N) A through hole 23 is formed in the compartment 21.
(O) From one of the fireproof compartments A and B, pass the wiring 5 or the pipe through the through hole 23 of the compartment 21.
(P) In one of the fire protection sections A and B, the through hole cover 30 covers the range of the wiring 5 or the pipe extending to the outside of the through hole 23. At this time, the orientation of the through hole cover 30 is adjusted so that the other end side range 2b of the main body is located on the partition body 11 side. Further, the width of the notch in the main body 2 is widened, the wiring 5 or the pipe is inserted from the notch into the inside of the main body 2, and the range surrounded by the tips of the protruding pieces 6 of the fin portions 4c, 4d, 4e (intersection of the gap 7). Positioned in.
(Q) The through hole cover 30 is slid along the wiring 5 or the pipe, the other end side range 2b of the main body 2 is inserted into the through hole 23, and the flange portion 3 is aligned with the wall surface of the compartment 21. As a result, the other end side range 2b of the main body 2 is arranged in the through hole 23, and the wiring 5 or the pipe is inserted inside the main body 2.
The through-hole cover 30 is fixed to the compartment 21 by fixing the flange portion 3 to the wall surface of the compartment 21 using an adhesive, an adhesive, an adhesive tape, a screw, or the like.

According to the above procedures (N) to (R), even in a situation where the wiring 5 or the pipe is already inserted in the through hole 23 of the compartment 21, the other end side range 2b of the main body 2 is arranged in the through hole 23. Then, the wiring 5 or the piping can be inserted inside the main body 2.

When the fire prevention structure 10 is constructed by the above procedure and a fire occurs in either of the fire prevention compartments A and B, the heat of the fire transmitted through the through hole 23 causes the through hole cover 30 (main body 2). The fin portions 4c, 4d, 4e and the flange portion 3) expand. Then, since the expanded through-hole cover 30 closes the gap of the through-hole 23, the fire is prevented from propagating to the other section.

According to the second embodiment, since the other end side range 2b of the main body 2 is short, the work of inserting the other end side range 2b of the main body 2 into the through hole 23 is easy. Further, since the one end side range 2a of the main body 2 made of the heat-expandable refractory resin material can be provided long on the outside of the compartment 21, it penetrates on one side of the compartment 21 (the installation side of the one end side range 2a). The outlet of the hole 23 can be tightly closed. As a result, it is not necessary to block the outlet of the through hole 23 on the other side of the compartment 21, so that the fireproof treatment of the through hole 23 can be realized by one-sided construction from one of the fire prevention compartments A and B.

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

For example, in the above embodiment, the fin portion 4 is provided at one end / other end of the main body 2 or at an intermediate position near the other end side, but the fin portion 4 is provided at the center position in the longitudinal direction of the main body 2. You may. Further, in the above embodiment, an example in which the number of fin portions 4 is set to 2 or 3 is shown, but the number of fin portions 4 may be more than 2 or 3. In this case, the radial gap 7 in one fin portion 4 is formed so as not to overlap with the radial gap 7 in the other fin portion 4 when viewed from one end or the other end in the longitudinal direction of the main body 2. .. Further, only one fin portion 4 may be provided.

Further, the number of the protruding pieces 6 constituting the fin portion 4 is not limited to 8 and 6 shown in the above embodiment, and may be any plurality. Further, the width and position of the gap 7 formed in each fin portion 4 can be set to an arbitrary width and position as long as the passage of light in the main body 2 can be prevented and the airtightness in the main body 2 can be ensured.

Further, according to the above embodiment, it has been stated that the work of filling the refractory putty can be omitted, so that the work load can be reduced. However, the present invention does not deny the use of the refractory putty, and if necessary, The inside of one end or the other end of the main body 2 may be filled with a refractory putty.

Further, the compartment provided by the fireproof structure of the present invention is not limited to a wall extending in the vertical direction, and may be a floor or a board extending in the horizontal direction. In this case, a through hole in the vertical direction is formed in the compartment, and the through hole covers 1 and 30 are inserted through the through hole. By doing so, when a fire breaks out on either the upper floor or the lower floor through the compartment, it is possible to prevent the fire from propagating to the other floor through the through hole. Further, by inserting the through hole covers 1 and 30 from above the through hole and aligning the flange portion 3 along the floor surface of the upper floor, the through hole covers 1 and 30 slide downward and enter the depth of the through hole. Can be prevented.

1,30 Through hole cover 2 Main body 2a Range on one end side in the longitudinal direction of the main body 2b Range on one end side in the longitudinal direction of the main body 3 Flange part 4 Fin part 5 Wiring 6 Protruding piece 7 Gap 8 Notch 10, 20 Fireproof structure 11, 21 compartments 12, 23 through holes

Claims (7)

A through-hole cover that is inserted into the through-hole of the compartment.
The main body, which has a tubular shape and in which wiring or piping is inserted,
A fin portion provided inside the main body is provided at a predetermined position in the longitudinal direction of the main body.
The fin portion is composed of a plurality of projecting pieces arranged in the circumferential direction of the inner peripheral surface of the main body.
The plurality of projecting pieces project inward in diameter from the inner peripheral surface of the main body, and the tips of the plurality of projecting pieces surround the wiring or the piping.
The main body and the plurality of projecting pieces constituting the fin portion have thermal expansion property and have thermal expansion properties.
The plurality of projecting pieces constituting each of the fin portions are arranged in the circumferential direction of the inner peripheral surface of the main body through a gap extending radially from the center of the main body.
A plurality of the fin portions are provided at intervals in the longitudinal direction of the main body, and the radial gap in one of the fin portions is the other when viewed from one end or the other end of the main body in the longitudinal direction. A through-hole cover that does not overlap with the radial gap in the fin portion of the. A through-hole cover that is inserted into the through-hole of the compartment.
The main body, which has a tubular shape and in which wiring or piping is inserted,
A fin portion provided inside the main body is provided at a predetermined position in the longitudinal direction of the main body.
The fin portion is composed of a plurality of projecting pieces arranged in the circumferential direction of the inner peripheral surface of the main body.
The plurality of projecting pieces project inward in diameter from the inner peripheral surface of the main body, and the tips of the plurality of projecting pieces surround the wiring or the piping.
The main body and the plurality of projecting pieces constituting the fin portion have thermal expansion property and have thermal expansion properties.
A flange portion that protrudes outside the diameter of the main body is provided at a predetermined position in the longitudinal direction of the main body, and the flange portion is formed of a heat-expandable resin material.
The flange portion is provided at an intermediate position in the longitudinal direction of the main body.
Of the one longitudinal end of the range and the other end extent of the body to border the flange portion, the length of one of the range, rather long than the length of the other range,
In each of the one range and the other range, the fin portion is provided inside the main body.
A through hole cover in which the other range is inserted into the through hole of the compartment and the length of the other range is shorter than the length of the through hole of the compartment. The through-hole cover according to claim 1 or 2, wherein the main body and the plurality of projecting pieces constituting the fin portion are formed of a heat-expandable resin material. The through-hole cover according to claim 2, wherein a plurality of fin portions are provided at intervals in the longitudinal direction of the main body. A notch extending from one end to the other end in the longitudinal direction is formed in the main body, and the notch is continuous in the gap between two adjacent protruding pieces in the circumferential direction of the main body, whereby the main body is formed. The through-hole cover according to any one of claims 1 to 4, which is in a substantially half-divided state. The through-hole cover according to any one of claims 1 to 5.
With a compartment with through holes
The main body of the through hole cover is inserted into the through hole,
A fireproof structure for a compartment through hole, characterized in that wiring or piping is inserted into the main body of the through hole cover. The sixth aspect of claim 6 in the case of quoting claim 1, wherein the main body is arranged over the entire width of the through hole by matching the length of the main body with the width of the through hole. Fireproof structure of the compartment through hole.