Fire-resistant structure, fire-resistant material, and construction method of fire-resistant structure

Abstract

The present invention provides a fire-resistant treatment structure, a fire-resistant treatment material, and a method for constructing a fire-resistant treatment structure, which can reduce variations in fire resistance performance and maintain sufficient fire resistance performance in a partition material having an opening for passing through an insertion object. [Solution] A fire-resistant treatment structure for a partition section 11 of a building, comprising partition materials 12A, 12B having openings 13A, 13B, wherein the sheet member 3 has a fire-resistant layer 3B and is deformable from a sheet shape to a sleeve shape, and is inserted into the openings 13A, 13B in a sleeve shape when the ends of a single member or multiple members are facing each other, or when the ends of a single member or multiple members overlap, and an insertion body 21 is passed through the inside, and is arranged along the inner circumferential surface of the openings 13A, 13B, and a flexible layer 3A is provided on the sheet member 3 that is pressed against the inner circumferential surface of the openings 13A, 13B by the restoring force of the sheet member 3 returning to a sheet shape when deformed into a sleeve shape, and deforms to follow the shape of the inner circumferential surface of the openings 13A, 13B.

Description

Technical Field

[0001] The present invention relates to a fireproof treatment structure formed in a partition part such as a building, a fireproof treatment material, and a construction method of the fireproof treatment structure.

Background Art

[0002] In buildings such as apartment houses, office buildings, and schools, partition parts such as wall surfaces, ceilings, and floors may be provided with partition through-holes for passing long insertion bodies such as cables and pipes. When a fire breaks out in any of the partitions, it is required that the partition through-hole has a structure (fireproof structure) with fireproof measures to prevent the spread of fire to other partitions.

[0003] As a method of making the partition through-hole a fireproof structure, for example, a method of filling an amorphous filler such as a fireproof putty in the gap between the long insertion body and the through-hole is known (see, for example, Patent Document 1). Also, a method is known in which a sleeve through which a long insertion body can be inserted is arranged in the through-hole, and an amorphous filler such as a fireproof putty is filled in the gap between the sleeve and the through-hole (see, for example, Patent Document 2). However, when an amorphous filler is used for the fireproof treatment of a partition material provided with an opening, the workability is not high, variations may occur depending on the operator, sufficient fireproof performance may not be obtained, and the fireproof performance may deteriorate due to aging deterioration.

[0004] Due to external forces such as earthquakes, an amorphous filler such as a fireproof putty may shift from its proper position where it was installed. Thus, when the fireproof putty or the like shifts from its proper position where it was installed, it becomes difficult to exhibit the fireproof performance desired for the fireproof treatment structure of the partition through-hole. Also, when an amorphous filler is used for the fireproof treatment of a partition material provided with an opening, it is difficult to confirm whether the amorphous filler reliably fills the opening. If the filling is insufficient, it becomes difficult to achieve the fireproof performance desired for the fireproof treatment structure of the partition through-hole. Furthermore, the shape of the openings to be treated with fire-resistant coatings is not always circular or polygonal, and the sleeve may not be able to conform to the shape of the opening, resulting in a gap between the sleeve and the opening. In order to achieve the desired fire-resistant performance, it becomes necessary to perform work such as filling with an amorphous filler, which hinders the improvement of work efficiency. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Patent No. 6348320 [Patent Document 2] Patent No. 7332388 [Overview of the project] [Problems that the invention aims to solve]

[0006] Therefore, the present invention provides a fire-resistant treatment structure, a fire-resistant treatment material, and a method for constructing a fire-resistant treatment structure that can reduce variations in fire resistance performance and maintain sufficient fire resistance performance in a partition material provided with an opening for passing through an insertion body. [Means for solving the problem]

[0007] This invention was made to solve the above problems, and the gist of this invention is as follows. [1] A fire-resistant treatment structure for a partition in a building made of a partition material having an opening, comprising a sheet member having a fire-resistant layer, which is deformable from a sheet shape to a sleeve shape, and which is in a state of being deformed into a sleeve shape by facing the ends of a single member or a plurality of members toward each other, or by overlapping the ends of a single member or a plurality of members, and in which state at least a part is inserted into the opening, through which an inserting body is passed inside, and which is arranged along the inner circumferential surface of the opening, wherein the sheet member is provided with a flexible layer that is pressed against the inner circumferential surface of the opening by the restoring force of the sheet member returning to a sheet shape when deformed into a sleeve shape, and which deforms to follow the shape of the inner circumferential surface of the opening. [2] The fire-resistant treatment structure according to [1], wherein the flexible layer constitutes at least a part of the outer circumference of the sheet member in a sleeve-shaped deformed state. [3] The fire-resistant treatment structure according to [1] or [2], wherein the sheet member has a laminated structure of two or more layers including the flexible layer and the fire-resistant material layer. [4] The fire-resistant treatment structure according to any one of [1] to [3], wherein the sheet member has a laminated structure of three or more layers including the flexible layer, the fire-resistant material layer and the base material layer. [5] The fire-resistant treatment structure according to [4], wherein the sheet member has a laminated structure in which the fire-resistant material layer, the base material layer, and the flexible layer are arranged in that order. [6] The sheet member comprises a surface layer, The fire-resistant treatment structure according to any one of [1] to [5], wherein the surface layer constitutes at least a part of the inner circumferential surface of the sheet member in a sleeve-shaped deformed state. [7] The fire-resistant treatment structure according to any one of [1] to [6], wherein the flexible layer has slits in the portion that constitutes the outer surface when it is deformed into a sleeve shape. [8] The fire-resistant treatment structure according to any one of [1] to [7], wherein the sheet member is provided with a locking portion, the locking portion contacts the partition material when the sheet member is inserted into the opening in a sleeve-like shape, and defines the installation position of the sheet member relative to the partition material. [9] The sheet member comprises a functional layer, and is a fire-resistant structure according to any one of [1] to [8].

[10] A fire-resistant treatment structure according to any one of [1] to [9], comprising a cover member that closes at least a portion of the gap between the opening and the insertion body.

[11] The fire-resistant treatment structure according to

[10] , wherein the cover member comprises a cover flexible layer, the cover flexible layer is positioned in contact with the insertion body and deforms to conform to the shape of the insertion body.

[12] The cover member has a slit, and the fire-resistant treatment structure is as described in

[10] .

[13] The cover member comprises a functional layer, the fire-resistant treatment structure according to

[10] .

[14] A fire-resistant material used to make a partition of a building formed by a partition material having an opening a fire-resistant structure, comprising a sheet member having at least a flexible layer and a fire-resistant layer, which is deformable from a sheet to a sleeve, and which is inserted into the opening in a state in which it has been deformed into a sleeve by facing the ends of a single member or a plurality of members toward each other, or by overlapping the ends of a single member or a plurality of members, with an inserting body passed through the inside, and which is arranged along the inner circumferential surface of the opening, wherein the sheet member in the state in which it has been deformed into a sleeve is pressed against the inner circumferential surface of the opening by a restoring force that returns it to a sheet state, and deforms to follow the shape of the inner circumferential surface of the opening.

[15] A method for constructing a fire-resistant structure in a partition of a building with an opening formed therein, comprising the steps of: deforming a sheet member having a fire-resistant layer and being deformable from a sheet to a sleeve shape by bringing the ends of a single member or multiple members facing each other, or by overlapping the ends of a single member or multiple members; and inserting at least a portion of the sheet member in the sleeve-shaped state into the opening, passing a through member through the inside, and positioning it along the inner circumferential surface of the opening, wherein the sheet member in the sleeve-shaped state is pressed against the inner circumferential surface of the opening by a restoring force that returns it to the sheet shape, and a flexible layer provided on the sheet member deforms to conform to the shape of the inner circumferential surface of the opening. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a fire-resistant treatment structure, a fire-resistant treatment material, and a method for constructing a fire-resistant treatment structure that can reduce variations in fire resistance performance and maintain sufficient fire resistance performance in a partition material provided with an opening for passing through an insertion body. [Brief explanation of the drawing]

[0009] [Figure 1] This is a perspective view showing the configuration of a fire-resistant treatment structure according to the first embodiment of the present invention. [Figure 2] This is a cross-sectional view of a fire-resistant treatment structure according to the first embodiment of the present invention. [Figure 3] It is a cross-sectional view seen from the axial direction of the insert body of the fireproof treatment structure according to the first embodiment of the present invention. [Figure 4] Fig. 4(a) is a perspective view showing a laminated sheet forming a sheet member used in the fireproof treatment structure according to the first embodiment of the present invention, and Fig. 4(b) is a perspective view showing a state where the laminated sheet is deformed into a sleeve shape. [Figure 5] It is a cross-sectional view of a laminated sheet according to a modification of the first embodiment of the present invention. [Figure 6] It is a cross-sectional view of the fireproof treatment structure according to the second embodiment of the present invention. [Figure 7] It is a cross-sectional view of a laminated sheet according to a modification of the second embodiment of the present invention. [Figure 8] It is a cross-sectional view of the fireproof treatment structure according to other embodiments of the present invention. [Figure 9] It is a perspective view showing a sleeve-shaped member according to other embodiments of the present invention. [Embodiments for Carrying Out the Invention]

[0010] Hereinafter, the present invention will be described in more detail using embodiments.

[0011] [First Embodiment] In the fireproof treatment structure 10 according to the first embodiment of the present invention, the partition portion 11 is a member that partitions between compartments (the first compartment A and the second compartment B) on the wall surface of a building, and has a compartment penetration portion 15 that penetrates from one outer surface 11A side of the partition portion 11 to the other outer surface 11B side. The partition portion 11 shown in Fig. 1 is a hollow wall and is composed of two partition materials 12A and 12B arranged with a space (hollow portion 13) therebetween. Therefore, the compartment penetration portion 15 is composed of an opening 13A formed in one partition material 12A, an opening 13B formed in the other partition material 12B, and the hollow portion 13 between them. And the outer surface of one partition material 12A constitutes the outer surface 11A of the partition portion 11, and the outer surface of the other partition material 12B constitutes the outer surface 11B of the partition portion 11. Examples of the partition materials 12A and 12B include gypsum board, ALC board, extruded cement board, lightweight wood fiber cement board, wood chip cement board, metal sandwich panel, calcium silicate board, slate board, concrete, brick, glass, and metal plates (e.g., aluminum, iron), etc. The partition materials 12A and 12B are provided with openings 13A and 13B for passing insertion bodies 21 (21A, 21B) such as cables and pipes. The shape of the openings 13A and 13B is not particularly limited as long as the insertion bodies can pass through, and for example, it may have a circular, elliptical, rectangular, polygonal or a shape approximating these. The partition materials 12A and 12B form a partition penetration portion by the openings 13A and 13B, and the partition penetration portion is processed by being blocked by a partition penetration treatment material. In this embodiment, the partition penetration treatment material is composed of a sheet member 3 and the like, which will be described later.

[0012] As shown in FIGS. 1 and 2, the fireproof treatment structure according to the first embodiment of the present invention uses the partition portion of the building formed by the partition materials 12A and 12B with the openings 13A and 13B as a fireproof structure. An insertion body 21 is inserted through the partition materials 12A and 12B with the openings 13A and 13B formed therein, and a fireproof treatment material is arranged to block the gap between the openings 13A and 13B and the insertion body 21. The fireproof treatment material is a member that blocks at least a part of the gap between the openings 13A and 13B and the insertion body 21, and constitutes at least a part of the partition penetration treatment material. In this embodiment, it is composed of a sheet member 3, which will be described later. In the fireproof treatment structure, the member constituting the fireproof treatment material preferably has a refractory material.

[0013] As shown in FIGS. 1 to 3, the sheet member 3 is provided at least partially inserted into the openings 13A and 13B of the partition penetration portion 15 provided in the partition portion 11 in a state of being deformed into a sleeve shape, and is arranged along the inner peripheral surface of the openings 13A and 13B. The sheet member 3 has at least a flexible layer 3A and a refractory material layer 3B. The sheet member 3, which can be deformed into a sleeve shape, is deformed into a sleeve shape so that it can be inserted into the openings 13A and 13B that constitute the partition penetration portion 15. In other words, the sheet member 3 should be shaped into a sleeve such that its outer diameter is less than or equal to the inner diameter of the openings 13A and 13B. When forming the sheet member 3 into a sleeve shape, the ends of a single member or multiple members are brought together, or the ends of a single member or multiple members are overlapped, and the ends are not bonded together. In this specification, "single member" refers to one type of member of the layer constituting the sheet member 3, and "multiple members" refers to multiple types of members of the layer constituting the sheet member 3. For example, "single member" is a single layer constituting the sheet member 3, and "multiple members" is multiple layers constituting the sheet member 3. More specifically, the sleeve-shaped sheet member 3 may have its ends, which are made of either one type of member, the flexible layer 3A or the fire-resistant layer 3B, that constitute the sheet member 3, brought together, or the ends, which are made of either one type of member, the flexible layer 3A or the fire-resistant layer 3B, that constitute the sheet member 3, may be overlapped. Furthermore, the sleeve-shaped sheet member 3 may have its ends, which are made of multiple types of members such as the flexible layer 3A and the fire-resistant layer 3B, that constitute the sheet member 3, brought together, or the ends, which are made of multiple types of members such as the flexible layer 3A and the fire-resistant layer 3B, that constitute the sheet member 3, may be overlapped. Furthermore, the ends of a single member and the ends of multiple members may face each other or overlap. In addition, the sheet member 3 may not have either the flexible layer 3A or the fire-resistant layer 3B at the ends that face each other or overlap. The sleeve-shaped sheet member 3 is pressed against the inner circumferential surfaces of the openings 13A and 13B by a restoring force that attempts to restore it to its sheet shape because its ends are not bonded together. This allows the flexible layer 3A to deform to conform to the shape of the inner circumferential surfaces of the openings 13A and 13B. As a result, the sleeve-shaped sheet member 3 also deforms to conform to the shape of the inner circumferential surfaces of the openings 13A and 13B, allowing it to conform even if the inner circumferential surfaces of the openings 13A and 13B have an irregular shape, and can be positioned without forming a gap between the sheet member 3 and the openings 13A and 13B. Furthermore, the restoring force that attempts to restore the sleeve-shaped sheet member 3 makes it easier to press it against the inner circumferential surfaces of the openings 13A and 13B and position it, allowing it to maintain its position in the openings 13A and 13B. By maintaining its position in the openings 13A and 13B, the sleeve-shaped sheet member 3 can be prevented from shifting from its appropriate position. The sleeve-shaped sheet member 3 does not necessarily have to pass through from one opening 13A to the other opening 13B, but in order to prevent the hollow portion 13 from communicating with the outside of the partition portion 11, it is preferable that it passes through the partition penetration portion 15 from one opening 13A to the other opening 13B, as shown in Figure 2.

[0014] Because the sheet member 3 is deformable into a sleeve shape, its size can be adjusted at the construction site to match the size of the openings 13A and 13B, thus accommodating partition penetrations 15 of various sizes. The thickness of the sheet member 3 is not particularly limited, but is, for example, 0.5 to 10 mm, preferably 1 to 5 mm. The sheet member 3 should be flexible so that it can be deformed into a sleeve shape.

[0015] As shown in Figure 4(a), the sheet member 3 is a laminated sheet 30 having a flexible layer 3A and a fire-resistant material layer 3B laminated on at least one surface of the flexible layer 3A. As shown in Figure 4(b), the sheet member 3 is formed into a sleeve shape by facing the ends of a single member or multiple members towards each other, or by overlapping the ends of a single member or multiple members, so that the flexible layer 3A becomes the outer surface. The sheet member 3 has a laminated structure of two or more layers consisting of a flexible layer 3A and a fire-resistant material layer 3B, thereby ensuring the fire resistance performance of the fire-resistant treatment structure 10. In Figure 4, the flexible layer 3A and the fire-resistant material layer 3B are laminated one by one in the thickness direction, but the sheet member 3 can also be configured by laminating multiple flexible layers 3A to improve conformability to openings 13A and 13B, and can also be configured by laminating multiple fire-resistant material layers 3B to improve fire resistance performance. The sheet member 3 is preferably a flat sheet before installation, as shown in Figure 4(a), but it may also have a shape other than a flat sheet, such as a C-shape.

[0016] The flexible layer 3A is preferably made of a flexible material that deforms to conform to the shape of the inner circumferential surface of the openings 13A and 13B. From the viewpoint of deforming to conform to the shape of the inner circumferential surface of the openings 13A and 13B, the flexible material is preferably an elastic material, and is preferably a foam or rubber. Examples of foams include foamed polyethylene, foamed polypropylene, foamed polystyrene, and foamed polyurethane. Examples of rubbers include natural rubber, silicone rubber, styrene-butadiene rubber, isoprene rubber, butadiene rubber, chloroprene rubber, acrylonitrile-butadiene rubber, nitrile-butadiene rubber, butyl rubber, ethylene-propylene rubber, ethylene-propylene-diene rubber, urethane rubber, silicone rubber, and fluororubber. The flexible layer 3A is preferably arranged to cover the entire axial direction of the outer surface of the sheet member 3 in its sleeve-shaped deformed state. By arranging the flexible layer 3A to cover the entire axial direction of the outer surface of the sheet member 3, there are no areas in the axial direction where the flexible layer 3A does not contact the inner surfaces of the openings 13A and 13B, thereby preventing gaps from forming between the sheet member 3 and the inner surfaces of the openings 13A and 13B. However, preferably, the flexible layer 3A is the same size as the fire-resistant layer 3B, as shown in Figure 4, and is laminated to cover the entire fire-resistant layer 3B. The thickness of the flexible layer 3A is not particularly limited, but is, for example, 0.1 to 15 mm, preferably 0.5 to 8 mm.

[0017] The fire-resistant layer 3B may be composed of at least one of a fire-resistant material and a non-combustible material. The fire-resistant material may be a thermally expandable material that expands when heated. The thermally expandable material prevents the spread of fire by expanding during a fire. The thermally expandable material is preferably formed from a thermally expandable resin composition, as described later. The non-combustible material is defined in the Building Standards Act and the Enforcement Order of the Building Standards Act. The thickness of the fire-resistant layer 3B is not particularly limited, but is, for example, 0.1 to 15 mm, preferably 0.5 to 8 mm.

[0018] (Thermally expandable resin composition) Next, we will describe in more detail the thermally expandable resin composition used in fire-resistant materials such as fire-resistant layers. The thermally expandable resin composition contains a resin component and a thermally expandable material. By forming the thermally expandable member with a thermally expandable resin composition containing a resin component, the bending and deformation of the base layer 1 becomes easier. Examples of thermally expandable materials include foaming agents that foam when heated, vermiculite, and thermally expandable layered inorganic materials such as thermally expandable graphite, with thermally expandable graphite being preferred. By using thermally expandable graphite, it expands appropriately when heated by a fire, and the mechanical strength of the expanded residue after expansion is excellent, making it easier to improve fire resistance. Note that the thermally expandable materials referred to here do not expand substantially through molding or other processes described later, and thermally expandable resin compositions maintain their thermal expandability in fire-resistant materials.

[0019] The expansion initiation temperature of a thermally expandable material is not particularly limited, but is preferably 150 to 350°C, more preferably 170 to 300°C, and even more preferably 180 to 280°C. Setting it below these lower limits prevents the thermally expandable material from expanding unintentionally due to heating other than fire. Setting it below the upper limit makes it easier to reliably expand the thermally expandable material due to heating from a fire. Furthermore, the expansion initiation temperature of a thermally expandable material can be measured by heating a predetermined amount (e.g., 100 mg) of the thermally expandable material at a constant heating rate (e.g., 10°C / min) and measuring the temperature at which the normal force begins to rise. The measuring device can be any device that allows for temperature control and measurement of stress in the normal direction; for example, a rheometer can be used. The thermal expansion ratio of the thermally expandable member is preferably 3 times or more, and preferably 10 times or more. The upper limit of the expansion ratio is not particularly limited, but for example it is 70 times, preferably 50 times. When multiple fire-resistant material layers with different expansion ratios are laminated on the base layer 1, the expansion ratio should be selected within the above range. Also, for example, the difference between the expansion ratio of the fire-resistant material layer furthest from the outer surface of the partition and the expansion ratio of the fire-resistant material layer closest to the outer surface of the partition is preferably 10 to 80 times, more preferably 20 to 70 times, and even more preferably 30 to 60 times. The expansion ratio can be calculated by supplying the thermally expandable material to an electric furnace, heating it at 600°C for 30 minutes, measuring the thickness of the test specimen, and then dividing it by (thickness of the test specimen after heating) / (thickness of the test specimen before heating).

[0020] The following describes in detail a thermally expandable resin composition when the thermally expandable material is thermally expandable graphite. Examples of resin components in a thermally expandable resin composition include thermoplastic resins, thermosetting resins, and elastomers. Examples of thermoplastic resins include polyvinyl chloride (PVC), chlorinated polyvinyl chloride resin (CPVC), fluororesins, polyphenylene ether, modified polyphenylene ether, polyphenylene sulfide, polycarbonate, polyetherimide, polyetheretherketone, polyarylate, polyamide, polyamideimide, polybutadiene, polyimide, acrylic resin, polyacetal, polyamide, polyethylene (PE) and polypropylene (PP), polyolefins such as ethylene vinyl acetate (EVA), ethylene-propylene-diene copolymer (EPDM), polyesters such as chloroprene (CR), polyethylene terephthalate, and polybutylene terephthalate, polycarbonate, polystyrene (PS), polyphenylene sulfide, acrylonitrile-butadiene-styrene copolymer (ABS), acrylonitrile-styrene-acrylonitrile copolymer (ASA), and acrylonitrile / ethylene-propylene-diene / styrene copolymer (AES). Examples of curable resins include epoxy resins, phenolic resins, melamine resins, urea resins, unsaturated polyester resins, alkyd resins, polyurethanes, and thermosetting polyimides.

[0021] Examples of elastomers include natural rubber, silicone rubber, styrene-butadiene rubber, isoprene rubber, butadiene rubber, chloroprene rubber, acrylonitrile-butadiene rubber, nitrile-butadiene rubber, butyl rubber, ethylene-propylene rubber, ethylene-propylene-diene rubber, urethane rubber, silicone rubber, and fluororubber. Other examples of thermoplastic elastomers include olefin-based thermoplastic elastomers (TPO), styrene-based thermoplastic elastomers (TPS), ester-based thermoplastic elastomers, amide-based thermoplastic elastomers, and vinyl chloride-based thermoplastic elastomers. The resin component of the heat-expandable resin composition may be one type or a combination of two or more types.

[0022] Furthermore, the use of an elastomer as a resin component in the thermally expandable resin composition makes it easier to achieve tackiness. From the viewpoint of facilitating the development of tackiness, it is preferable that the elastomer contains a liquid elastomer. A liquid elastomer is an elastomer that becomes liquid at room temperature and pressure.

[0023] The heat-expandable resin composition may contain a plasticizer. Plasticizers are preferably used when the resin component is a thermoplastic resin such as polyvinyl chloride resin. Specific examples of plasticizers include phthalate ester plasticizers such as di-2-ethylhexyl phthalate (DOP), dibutyl phthalate (DBP), diheptyl phthalate (DHP), and diisodecyl phthalate (DIDP); fatty acid ester plasticizers such as adipate esters such as di-2-ethylhexyl adipate (DOA), diisobutyl adipate (DIBA), and dibutyl adipate (DBA), and adipate polyester; epoxidized ester plasticizers such as epoxidized soybean oil; trimellitate ester plasticizers such as tory 2-ethylhexyl trimellitate (TOTM) and triisononyl trimellitate (TINTM); phosphate ester plasticizers such as trimethyl phosphate (TMP) and triethyl phosphate (TEP); and process oils such as mineral oil. One or more types of plasticizers may be used. When a heat-expandable resin composition contains a plasticizer, the amount of plasticizer in the heat-expandable resin composition is, for example, in the range of 0.3 parts by mass to 150 parts by mass per 100 parts by mass of the resin component, preferably in the range of 10 parts by mass to 100 parts by mass. If the amount of plasticizer is above these lower limits, moldability tends to be good, and if it is below the upper limits, the molded article is given appropriate strength.

[0024] The total content of resin components and plasticizers is preferably 10% to 90% by mass, more preferably 25% to 80% by mass, and even more preferably 40% to 70% by mass, based on the total amount of the resin composition. Setting the content above these lower limits improves the moldability of the thermally expandable member. It also ensures flexibility, making bending and deformation easier. Furthermore, setting the content below the upper limits allows for the incorporation of sufficient amounts of components such as thermally expandable graphite and inorganic fillers. Note that the total content of resin components and plasticizers refers to the combined content of both resin components and plasticizers if both are present, and to the content of resin components alone if no plasticizer is present.

[0025] Thermally expandable graphite is a conventionally known substance, produced by treating powders of natural flake graphite, pyrolysis graphite, quiche graphite, etc., with inorganic acids such as concentrated sulfuric acid, nitric acid, and selenic acid, and strong oxidizing agents such as concentrated nitric acid, perchloric acid, perchlorate, permanganate, dichromate, and hydrogen peroxide to generate graphite intercalation compounds. The resulting thermally expandable graphite is a crystalline compound that maintains the layered structure of carbon. The thermally expandable graphite used in this invention may also be obtained by neutralizing thermally expandable graphite obtained by acid treatment with ammonia, aliphatic lower amines, alkali metal compounds, alkaline earth metal compounds, etc. Examples of aliphatic lower amines include monomethylamine, dimethylamine, trimethylamine, ethylamine, propylamine, and butylamine. Examples of alkali metal compounds and alkaline earth metal compounds include hydroxides, oxides, carbonates, sulfates, and organic acid salts of potassium, sodium, calcium, barium, magnesium, and other metals.

[0026] The particle size of the thermally expandable graphite is not particularly limited, but a range of 20 to 200 mesh is preferred. If the particle size is above the lower limit, the degree of expansion of the graphite tends to increase, resulting in good foaming properties. If the particle size is below the upper limit, the dispersibility when kneading with resin improves, and moldability is enhanced.

[0027] The content of thermally expandable graphite in the thermally expandable resin composition is, for example, 3 parts by mass or more and 300 parts by mass or less per 100 parts by mass of the resin component. When the content of thermally expandable graphite is 3 parts by mass or more, good thermal expandability is achieved. When it is 300 parts by mass or less, good moldability is achieved, and the surface properties, mechanical properties, and flexibility of the sealing member are also good. Furthermore, by selecting the content of thermally expandable graphite within the above range, it becomes easier to adjust the expansion ratio to a desired range. From these viewpoints, the content of thermally expandable graphite is preferably in the range of 10 parts by mass or more and 200 parts by mass or less, and more preferably in the range of 15 parts by mass or more and 100 parts by mass or less.

[0028] The thermally expandable resin composition may further contain an inorganic filler. The inorganic filler is not particularly limited as long as it is an inorganic filler commonly used in thermally expandable resin compositions. Specifically, examples include silica, diatomaceous earth, alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, ferrites, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, barium carbonate, dohnite, hydrotalcite, calcium sulfate, barium sulfate, gypsum fiber, calcium silicate, talc, clay, myca, montmorillonite, bentonite, activated clay, ceviolite, imogolite, sericite, glass fiber, glass beads, silica balloon, aluminum nitride, aluminum phosphite, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, carbon balloon, charcoal powder, various metal powders, potassium titanate, magnesium sulfate, lead zirconia titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powders, slag fiber, fly ash, dewatered sludge, etc. One or more types of inorganic fillers may be used. When an inorganic filler is included, the amount of inorganic filler in the thermally expandable resin composition is preferably in the range of 3 parts by mass or more and 200 parts by mass or less, and more preferably in the range of 10 parts by mass or more and 150 parts by mass or less, per 100 parts by mass of the resin component.

[0029] The thermally expandable resin composition may contain known tackifiers. Including a tackifier makes it easier to impart tackiness to the thermally expandable member. Furthermore, the thermally expandable resin composition used in the present invention may contain, as necessary, additives commonly used in thermally expandable resin compositions, such as heat stabilizers, lubricants, processing aids, antioxidants, antistatic agents, pigments, crosslinking agents, and crosslinking accelerators, to the extent that they do not impair its physical properties. Among these, the use of processing aids is preferred.

[0030] A thermally expandable component can be manufactured, for example, as follows: First, a predetermined amount of resin components, a thermally expandable material, and other additives as needed are mixed in a mixer such as a kneading roll to obtain a thermally expandable resin composition. The thermally expandable resin composition may be diluted by adding a solvent as appropriate. The heat-expandable resin composition, diluted as needed, is applied to a support such as the base layer and flexible layer 3A described later, and dried and cured as appropriate to form a fire-resistant layer (heat-expandable member) 3B on one surface of the flexible layer 3A or the base layer. Alternatively, the fire-resistant layer 3B may be formed on one surface of the release sheet by known methods such as extrusion molding. The fire-resistant layer 3B formed on the release sheet may be peeled off the release sheet to become a single layer of fire-resistant material. This single fire-resistant layer may then be further bonded to other layers such as the flexible layer 3A or the base layer using an adhesive as needed. Alternatively, it may be laminated onto other layers (flexible layer or base layer) while still laminated on the release sheet or on other support (base layer or flexible layer).

[0031] In the fire-resistant structure 10, in order to achieve the desired fire resistance performance as a fire-resistant structure for the compartment penetration 15, a filler material (not shown) may be placed in the gap between the sheet member 3 and the insertion body 21 to prevent gaps. The filler material can be a fire-resistant filler material such as a putty material that has fire resistance and is used to fill gaps. If a fire-resistant filler material is used, it is preferable to fill the gap between the sheet member 3 and the insertion body 21 with the fire-resistant filler material.

[0032] A putty composition used as a fire-resistant putty material will be described in more detail. The putty composition contains a binder component and a filler. The binder component can be any resin component used in a heat-expandable resin composition, preferably an elastomer. More preferably, the binder component is a liquid elastomer, such as liquid polybutadiene rubber, liquid styrene-butadiene rubber, liquid chloroprene rubber, and liquid isoprene rubber. As fillers, inorganic fillers used in heat-expandable resin compositions can be used as appropriate. Among the inorganic fillers, preferred are metal hydroxides such as aluminum hydroxide, magnesium hydroxide, calcium hydroxide, talc and kaolinite, manganese hydroxide, iron hydroxide, and zinc hydroxide, phosphates, polyphosphates, polymer inorganic polyphosphates, phosphate minerals and other phosphorus compounds, and carbonate compounds such as calcium carbonate, magnesium carbonate, zinc carbonate, strontium carbonate and barium carbonate, potassium carbonate, sodium carbonate, lithium carbonate, iron carbonate, and silver carbonate. Using these inorganic fillers makes it easier to impart fire resistance to the putty material. The putty composition may, if necessary, contain plasticizers, tackifying resins, and other components, similar to the thermally expandable resin composition. However, while the putty composition does not necessarily need to contain thermally expandable materials, it may contain them. Details of the thermally expandable materials are as described above.

[0033] The inorganic filler content in the putty composition is preferably in the range of 30 parts by mass or more and 500 parts by mass or less, more preferably in the range of 50 parts by mass or more and 400 parts by mass or less, and even more preferably in the range of 80 parts by mass or more and 250 parts by mass or less, per 100 parts by mass of the binder component. The putty material can be formed by the same method as the above-mentioned heat-expandable resin composition. In the above explanation, the putty composition was described using a resin component (organic material) as the binder component as described above, but any conventionally known material that can be used as a fire-resistant putty can be appropriately selected and used. For example, it is not necessary to use a resin component as the binder component, and a fire-resistant putty that does not contain organic material may also be used, for example, a fire-resistant putty made of clay.

[0034] [Construction method] In the construction method of the fire-resistant structure in this embodiment, first, as shown in Figure 4, a sheet-like member 3 is prepared which has at least a flexible layer 3A and a fire-resistant material layer 3B and can be deformed from a sheet shape to a sleeve shape. Then, the sheet-like member 3 is deformed into a sleeve shape by bringing the ends of a single member or multiple members facing each other, or by overlapping the ends of a single member or multiple members. Next, the sheet member 3, in its sleeve-like deformed state, is inserted into the openings 13A and 13B in at least a portion thereof, the inserting body 21 is passed through it, and the sheet member 3 is positioned along the inner circumferential surface of the openings 13A and 13B. In this process, the sheet member 3, in its sleeve-like deformed state, is pressed against the inner circumferential surface of the openings 13A and 13B by the restoring force that returns it to its sheet-like state, and the flexible layer 3A, i.e., the sheet member 3, deforms to conform to the shape of the inner circumferential surface of the openings 13A and 13B. Next, it is advisable to fill the gap between the sheet member 3 and the insertion body 21 with fire-resistant filler material to prevent gaps. By performing the above steps, a fire-resistant structure can be created by treating the compartment penetration.

[0035] According to the fire-resistant treatment structure of this embodiment, the sleeve-shaped sheet member 3 deforms to conform to the shape of the inner circumferential surface of the openings 13A and 13B, so that it can conform even if the inner circumferential surface of the openings 13A and 13B has an irregular shape, and can be positioned without forming a gap between the sheet member 3 and the openings 13A and 13B. Therefore, variations in fire resistance performance can be reduced and sufficient fire resistance performance can be maintained. In addition, by maintaining the state in which the sleeve-shaped sheet member 3 is positioned in the openings 13A and 13B, it is possible to prevent the sheet member 3 from shifting from the appropriate position in which it was installed. Furthermore, since the fire-resistant treatment structure of this embodiment can be applied from one side, it offers good workability. Furthermore, a portion of the sheet material 3 can be seen from the outside, allowing for confirmation that the fire-resistant material has been properly installed and that fire protection has been applied.

[0036] [Modified version of the first embodiment] In the first embodiment, the sheet member 3 is shown as a laminated sheet 30, which has a two-layer structure consisting of a flexible layer 3A and a fire-resistant layer 3B, as shown in Figure 5(a). However, the structure of the laminated sheet 30 forming the sheet member 3 is not limited to the structure shown in Figure 5(a), and can be configured in various ways. For example, the laminated sheet 30A shown in Figure 5(b) is a laminated structure of three or more layers consisting of a flexible layer 3A, a fire-resistant layer 3B, and a base layer 3C. The base layer 3C provides rigidity to the laminated sheet 30A, improving its handling and ability to maintain its installation position. In the case of a laminated sheet 30A having a base layer 3C and a fire-resistant layer 3B, the base layer 3C can suppress the expansion of the fire-resistant layer 3B and control the shape of the expanded fire-resistant layer 3B. Examples of the base layer 3C include metals such as aluminum, copper, and steel; metal foil composites such as glass cloth and aluminum glass cloth composites of metal foil and glass cloth; paper; cloth; resin film; and metal or resin molded products that are already in an arc shape such as a C. Among the above, the base layer 3C is preferably made of a non-combustible material from the viewpoint of fire resistance, and preferred specific examples include metal foil and metal foil composites. The laminated sheet 30A has a laminated structure in which the fire-resistant layer 3B, the base material layer 3C, and the flexible layer 3A are arranged in that order. With this arrangement, the base material layer 3C does not hinder the functions of the flexible layer 3A and the fire-resistant layer 3B, and can assist the functions of the flexible layer 3A and the fire-resistant layer 3B. The thickness of the base layer 3C is not particularly limited, but is, for example, 0.01 to 1 mm, preferably 0.05 to 0.5 mm. By having the thickness of the base layer 3C within the above range, the laminated sheet 30A can be given appropriate flexibility and rigidity.

[0037] The laminated sheet 10B shown in Figure 5(c) has a surface layer 3D and is a laminated structure of four or more layers consisting of a flexible layer 3A, a fire-resistant material layer 3B, a base material layer 3C, and the surface layer 3D. The surface layer 3D provides aesthetic appeal to the laminated sheet 10B, and by making the sheet member 3 the same as the laminated sheet 10B, the aesthetic appeal of the fire-resistant structure in which the sheet member 3 is arranged can be improved. Examples of the surface layer 3D include nonwoven fabric, polyethylene film, metal foil, metal mesh, etc. The laminated sheet 30B is preferably a laminated structure in which the surface layer 3D, fire-resistant material layer 3B, base material layer 3C, and flexible layer 3A are arranged in that order. With this arrangement, the surface layer 3D can form at least a portion of the inner circumferential surface of the sheet member 3 when it is deformed into a sleeve shape. When the sheet member 3 is deformed into a sleeve shape, at least a portion of the inner circumferential surface is formed by the surface layer 3D, which provides aesthetic appeal and improves the aesthetic appeal of the fire-resistant structure. The thickness of the surface layer 3D is not particularly limited, but is, for example, 0.01 to 1 mm, preferably 0.05 to 0.5 mm. By having the surface layer 3D thickness within the above range, it is possible to impart design appeal without worsening the handling of the laminated sheet 30B.

[0038] The laminated sheet 30C shown in Figure 5(d) has a laminated structure of four or more layers, consisting of a flexible layer 3A, a base material layer 3C, a fire-resistant material layer 3B, and a flexible layer 3A'. The flexible layer 3A' provides flexibility to the inner circumferential surface of the sheet member 3 when it is deformed into a sleeve shape, and functions as a buffer layer when the insert 21 or the like comes into contact with the inner circumferential surface of the sheet member 3 when it is deformed into a sleeve shape. The flexible layer 3A' may be made of the same material as the flexible layer 3A, or it may be made of a different material than the flexible layer 3A.

[0039] The laminated sheet 30D shown in Figure 5(e) has a laminated structure of four or more layers consisting of a base layer 3C', a flexible layer 3A, a base layer 3C, and a fire-resistant layer 3B. The base layer 3C' constitutes the outer circumferential surface of the sheet member 3 in a sleeve-like deformed state, and like the flexible layer 3A, it is required to deform to conform to the shape of the inner circumferential surface of the openings 13A and 13B, so it is preferable to use a flexible material. Examples of base layer 3C' include paper, cloth, and resin film.

[0040] The laminated sheet 30 forming the sheet member 3 may have layers other than the flexible layer and fire-resistant layer described above, and may appropriately include, for example, an adhesive layer. When the adhesive layer is placed in the outermost layer, it functions to adhere the sheet member 3 to the inner circumferential surface of the openings 13A and 13B. When placed in the inner layer, it functions to bond adjacent layers together. For example, it may bond the flexible layer to the fire-resistant layer, or the flexible layer to the base material layer, or the fire-resistant layer to the base material layer. The adhesive layer is often formed by an adhesive, and examples of adhesives that can be used include acrylic adhesives, urethane adhesives, rubber adhesives, and silicone resin adhesives. The adhesive layer may be non-combustible, semi-non-combustible, or flame-retardant, and flame retardants may be added to the adhesive used. The thickness of the adhesive layer is, for example, 5 to 400 μm, preferably 10 to 150 μm. Having the adhesive layer thickness within this range provides appropriate tackiness.

[0041] The configuration of the laminated sheet forming the sheet member 3 is not limited to the above, and any configuration is acceptable as long as it achieves the effects of the present invention. However, from the viewpoint of the sheet member 3 easily conforming to the shape of the inner circumferential surface of the opening, it is preferable that at least one flexible layer be positioned on the outer periphery side of the fire-resistant material layer in the sleeve-shaped sheet member 3. Furthermore, from the same viewpoint, it is even more preferable that the flexible layer be positioned on the outermost surface of the sheet member in the sleeve-shaped deformed state, forming the outer periphery of the sheet member. Furthermore, although the sheet member 3 has been described on the premise that it is composed of a laminated sheet in which multiple layers are joined together to form an integrated member, each layer may be composed separately. For example, in the configuration shown in Figure 1, a fire-resistant sheet consisting of a fire-resistant layer 3B and a flexible sheet constituting a flexible layer 3A may be prepared separately, and the flexible sheet and the fire-resistant sheet may be stacked and inserted into the openings 13A and 13B as a sheet member. Alternatively, a laminated sheet consisting of a fire-resistant sheet and a base material and a flexible sheet may be prepared separately, and the flexible sheet and the laminated sheet may be stacked and inserted into the opening as a sheet member 3.

[0042] [Second Embodiment] The fire-resistant structure 10 in the second embodiment can further include a cover member 4, as shown in Figure 6.

[0043] As shown in Figure 6, the cover member 4 closes at least a portion of the gap 40 between the opening 13A of the partition penetration 15 and the insertion body 21. The cover member 4 may be fixed to the outer surface of the sheet member 3 by known fixing means such as an adhesive, a tack, and an adhesive tape. Here, the adhesive, tack, and adhesive tape are preferably made of non-combustible material, semi-non-combustible material, or flame-retardant material, and it is preferable to incorporate a flame retardant into the adhesive, tack, etc. Specifically, the cover member 4 may be provided such that one end surrounds the outer surface of the sleeve-shaped sheet member 3 from the outside, over its entire circumference, and the other end surrounds the insertion body 21 over its entire circumference.

[0044] From the viewpoint of reducing variations in fire resistance and maintaining sufficient fire resistance, the cover member 4 should be configured to be closely fixed to the insertion body 21. By providing fixing members such as adhesive parts, magnetic parts, putty, caulking material, and fasteners between the cover member 4 and the insertion body 21, the cover member 4 and the insertion body 21 can be closely fixed. For example, the adhesive part uses acrylic adhesive, urethane adhesive, rubber adhesive, silicone resin adhesive, and double-sided tape to closely fix the cover member 4 and the insertion body 21 by adhesive force. The magnetic part uses magnetic force to closely fix the cover member 4 and the insertion body 21. Putty and caulking material close the gap between the cover member 4 and the insertion body 21 to fix them closely. Fasteners use screws, staples, etc. to physically fix the cover member 4A and the insertion body 21 to fix them closely. As shown in Figure 6, the cover member 4 may be fixed to the insertion body 21 by a string-like fastener 22 that surrounds the insertion body 21 and wraps around it from the outside, with the portion covering the opening 13A of the partition penetration portion 15. The string-like fastener 22 can be any bendable material, and is preferably a wire material including a wire. The wire material may be a metal wire alone, a resin-coated wire made by coating a metal wire with resin such as Nejiriko (registered trademark), or a wire and fiber intertwined, such as a molding. Using a wire material allows the cover member 4 to be fixed to the insertion body 21 simply by twisting or turning it. Furthermore, the cover member 4 may be fixed to the insertion body 21 by fasteners such as staples or screws. Of course, the cover member 4 may also be fixed to the insertion body 21 by a combination of two or more of these fasteners.

[0045] There is a gap 40 between the cover member 4 and the insertion body 21. The gap 40 between the cover member 4 and the insertion body 21 provides a margin of error for the axial movement of the insertion body 21 and for the movement of the insertion body 21 near the opening 13A. In this way, by providing a margin of error for the movement of the insertion body 21 with the gap 40, even if the insertion body 21 moves, the margin of error provided by the gap 40 prevents the cover member 4 from moving together with the insertion body 21, and prevents the cover member 4 from shifting away from the partition penetration portion 15.

[0046] The cover member 4 is fixed with a margin of error against the axial movement of the insertion body 21. Because the cover member 4 is fixed to the insertion body 21 with a margin of error, even if the insertion body 21, which is positioned inside the sheet member 3, is moved axially after the sheet member 3 is installed, the margin of error of the cover member 4 can buffer the sheet member 3 from moving together with the insertion body 21. And because the cover member 4 is fixed to the insertion body 21 with a margin of error, it is possible to buffer the sheet member 3 from moving together with the insertion body 21, thereby suppressing the sheet member 3 from shifting away from the compartment penetration 15. In other words, with this configuration, the sheet member 3 can be maintained in the appropriate position within the compartment penetration 15, and the fire resistance of the compartment penetration 15 can be maintained. Configurations that allow the cover member 4 to be fixed with a margin of error against the axial movement of the insertion body 21 include, for example, a configuration in which at least a part of the cover member 4 is made of a flexible or stretchable material that can be bent or curved, and a configuration in which at least a part of the cover member 4 is fixed to the insertion body 21 with some slack.

[0047] The cover member 4 is preferably made of a non-combustible material, and can be made of a metal foil composite such as aluminum foil, glass cloth, or a composite of metal foil and glass cloth such as aluminum glass cloth. From the viewpoint of fire resistance, it is preferable that at least one surface of the cover member 4 is covered with a metal foil composite. Furthermore, the cover member 4 may be made of a non-combustible material such as a metal foil composite with a thermally expandable member laminated on it, to the extent that it does not contradict the spirit of the present invention. The thermally expandable member may be made of a thermally expandable resin composition or the like. Among the above, it is preferable that the cover member 4 has at least a metal foil composite.

[0048] The thickness of the cover member 4 is, for example, 0.01 to 1 mm, preferably 0.05 to 0.5 mm. If the thickness of the cover member 4 is outside the above range, it will have flexibility and improve workability.

[0049] The cover member 4 does not need to be fixed to the outer circumferential surface of the sheet member 3, but may be fixed to the outer surface 11A of the partition portion 11. Alternatively, the cover member 4 may be fixed to the inner circumferential surface of the sheet member 3. The fixing means for fixing the cover member 4 to the outer surface 11A of the partition portion 11 and the inner circumferential surface of the sheet member 3 can be known fixing means such as adhesives, tacks, and adhesive tapes.

[0050] If a cover member 4 is provided, the filler material that is placed to prevent gaps between the sheet member 3 and the insertion body 21 may be omitted. However, in order to improve the fire resistance performance of the fire-resistant structure of the compartment penetration, the cover member 4 and the filler material described above may be used in combination. It is preferable that the filler material be placed to close gaps if there are gaps between the sheet member 3 and the cover member 4, and between the cover member 4 and the insertion body 21. The filler is not particularly limited as long as it is a fire-resistant material, but it is preferable that the filler be formed from a thermally expandable resin composition containing the above-mentioned thermally expandable material.

[0051] The method for constructing the fire-resistant structure 10 in this embodiment is the same as in the first embodiment, except that a cover member 4 is further positioned to close at least a portion of the gap 40 between the opening 13A of the compartment penetration 15 and the insertion body 21. The cover member 4 may be placed in the compartment penetration 15 after the sleeve-shaped sheet member 3 has been placed in the opening 13A of the compartment penetration 15. Alternatively, the cover member 4 may be attached to the sleeve-shaped sheet member 3 and then placed in the compartment penetration 15 together with the sheet member 3.

[0052] In this embodiment, an example is shown in which a cover member 4 is placed to close at least a portion of the gap 40 between the opening 13A of the partition penetration 15 and the insertion body 21. However, in addition to the cover member 4 and fire-resistant material, a material such as rock wool may be provided to fill the gap 40 between the sheet member 3 and the insertion body 21, either instead of or in combination with these.

[0053] [Modified version of the second embodiment] In the second embodiment, the cover member 4 is shown as a separate component from the sheet member 3, but it may be integrated with the sheet member 3. In the case of a cover member 4 integrated with the sheet member 3, for example as shown in Figure 7(a), the base material layer 3C constituting the laminated sheet 30E forming the sheet member 3 may extend outward from the flexible layer 3A and the fire-resistant material layer 3B in the axial direction when the base material layer 3C is made into a sleeve shape, and the extended portion may become the cover member 4.

[0054] The laminated sheet 30F shown in Figure 7(b) has a configuration in which a cover member 4, which is integrated with the sheet member 3, is equipped with a cover flexible layer 5. The cover flexible layer 5 is positioned on the inside of the cover member 4 when the cover member 4 is installed. The cover flexible layer 5 is positioned in contact with the insertion body 21 and deforms to conform to the shape of the insertion body 21, thereby contributing to a configuration in which the cover member 4 is closely fixed to the insertion body 21. The cover flexible layer 5 may be made of the same material as the flexible layer 3A, or it may be made of a different material than the flexible layer 3A.

[0055] The laminated sheet 30G shown in Figure 7(c) and the laminated sheet 30H shown in Figure 7(d) are configured to have a cover member 4, which is integrated with the sheet member 3, and is equipped with a cover flexible layer 5A and a cover functional layer 5B. The cover flexible layer 5A provides flexibility to the cover member 4, is positioned in contact with the insertion body 21, and deforms to conform to the shape of the insertion body 21. The cover functional layer 5B provides various functions to the cover member 4. The cover functional layer 5B may be, for example, a thermally expandable member that provides thermal expansion, or it may be a soundproofing member, odorproofing member, or heat insulating member that provides various functions such as sound insulation, odor prevention, and heat insulation. The functions of sound insulation, odor prevention, and heat insulation are functions that prevent sound leakage, odor leakage, heat leakage, etc., from occurring between compartments (the first compartment A and the second compartment B). For the cover functional layer 5B, for example, foam or rubber material can be used. There are no particular limitations on the placement of the cover flexible layer 5A and the cover functional layer 5B on the cover member 4. The cover flexible layer 5A can be placed where flexibility is desired in the cover member 4, and the cover functional layer 5B can be placed where functionality is desired in the cover member 4. In the laminated sheet 30G shown in Figure 7(c), the cover flexible layer 5A is placed on the leading edge of the cover member 4 to provide flexibility, and the cover functional layer 5B is placed on the sheet member 3 side of the cover member 4 to provide functionality. In the laminated sheet 30H shown in Figure 7(d), the cover fire-resistant layer 5B is placed on the leading edge of the cover member 4 to provide functionality, and the cover flexible layer 5A is placed on the sheet member 3 side of the cover member 4 to provide flexibility.

[0056] [Other embodiments] The present invention is not limited to the configuration of the embodiments described above, and any improvements or modifications may be made as long as they do not depart from the technical concept of the present invention. For example, in the above description, the partition members 12A and 12B have a hollow section inside and consist of a pair of partition members, but they may also be configured without a hollow section inside.

[0057] The sheet member 3 may also be configured to include a locking portion 6, as shown in Figure 8. The locking portion 6 contacts the partition material 12A when the sheet member 3 is inserted into the openings 13A and 13B in a sleeve-like shape, and defines the installation position of the sheet member 3 relative to the partition material 12A. The locking portion 6 is provided on the outer circumferential surface of the sheet member 3 and locks onto the outer circumferential surface 11A of the partition material 12A, thereby fixing the installation position of the sheet member 3 in a way that can be defined. The shape of the locking portion 6 is not particularly limited and can be, for example, block-shaped, columnar, or point-shaped. The locking portion 6 is not particularly limited as long as it is made of a material capable of locking the sheet member 3, and examples include fire-resistant materials, foams, putty materials, and caulking materials, and may also be a composite material made by combining two or more of these. The fire-resistant material is not particularly limited as long as it is a material that has fire resistance, but it is preferably a fire-resistant material formed from a thermally expandable resin composition containing the above-mentioned thermally expandable material. Details of the fire-resistant material are as described above. Examples of foams include foamed polyethylene, foamed polypropylene, foamed polystyrene, and foamed polyurethane. Examples of putty materials and caulking materials include those made by blending synthetic resin materials such as silicone resins, acrylic resins, and urethane resins as the main component with fillers and flame retardants.

[0058] The sheet member 3 may also have a configuration that includes a functional layer. The cover layer provides various functions to the sheet member 3. The functional layer may be, for example, a sound-insulating member, an odor-proof member, or an insulation member that provides various functions such as sound insulation, odor prevention, and heat insulation. The functions of sound insulation, odor prevention, and heat insulation are functions that prevent sound leakage, odor leakage, heat leakage, etc., from occurring between compartments (the first compartment A and the second compartment B). For example, foam or rubber material can be used as the functional layer. There are no particular limitations on the placement of the functional layer, but in order not to interfere with the functions of the flexible layer 3A and the fire-resistant layer 3B, it is preferable to place it somewhere between the flexible layer 3A and the fire-resistant layer 3B.

[0059] The flexible layer 3A of the sheet member 3 may have a slit 31 in the area that constitutes the outer surface when it is deformed into a sleeve shape, as shown in Figure 9(a). Having a slit 31 in the flexible layer 3A makes it easier to deform into a sleeve shape. The slit 31 is formed by cutting from the surface of the flexible layer 3A and can be a full cut formed over the entire thickness of the flexible layer 3A or a half cut formed over a portion of the thickness of the flexible layer 3A. Alternatively, the slit 31 may be a gap formed by arranging strip-shaped flexible layers 3A side by side. The slit 31 may be provided parallel to the axial direction when the sheet member 3 is formed into a sleeve shape, as shown in Figure 9(a), or it may be provided at an angle to the axial direction when the sheet member 3 is formed into a sleeve shape, as shown in Figure 9(b). Figures 9(a) and (b) show the case where there are multiple slits 31, but there may be only one slit.

[0060] As shown in the second embodiment, if a cover member 4 is provided, the cover member 4 may be configured to have a slit (cover slit). The cover slit is formed by a cut extending from the front to the back surface of the cover member 4. The cover slit may extend to the outer edge of the cover member 4 in order to allow the insertion body 21 to pass through the interior of the cover member 4. Furthermore, the cover slit is a cut formed along the axial direction or a direction inclined with respect to the axial direction. The cover member 4 having a cover slit allows it to be wrapped tightly around the outer circumference of the insertion body 21, making it easier to ensure fire resistance. Furthermore, the cover member 4 having a cover slit makes it easier to wrap around the outer circumference of the insertion body 21, improving workability.

[0061] In the above description, the shape of the outer circumferential surface of the sheet member 3 is stated to be a circle, an ellipse, or a shape approximating these, but it is sufficient to match the shape of the inner circumferential surface of the openings 13A and 13B, and may be a rectangle or a polygon.

[0062] Furthermore, while the above description has shown the first and second embodiments and other embodiments as fire-resistant structures, the first and second embodiments and other embodiments may be combined as appropriate. In other words, each of the embodiments shown in the above description may be combined as appropriate. Furthermore, although the above description shows the sheet member 3 being positioned so that its outer circumference is in direct contact with the inner surface of the opening, if there is a gap-filling material such as putty or adhesive between the sheet member 3 and the openings 13A and 13B, the sheet member 3 may be positioned so that it is in contact with the inner surface of the openings 13A and 13B via the gap-filling material. [Explanation of Symbols]

[0063] 10. Fire-resistant structure 11 Partition section 12A, 12B partition material 13 Hollow part 13A,13B opening 13E Gap 15 Compartment Penetration 21 Insertion body 22 Fastening material 3 Sheet members 3A flexible layer 3B Refractory layer 3C base material layer 3D surface layer 30 Laminated Sheets 31 slits 4 Cover component 5.5A Cover Flexible Layer 5B Cover Functional Layer 6. Locking part

Claims

1. A fire-resistant treatment structure for a partition section of a building using a partition material with an opening formed therein, The sheet member has a fire-resistant layer, is deformable from a sheet to a sleeve, and is inserted into the opening in a sleeve-like state when the ends of a single or multiple member are facing each other, or when the ends of a single or multiple member overlap, with at least a portion of the sheet member passing through the interior and arranged along the inner circumferential surface of the opening. A fire-resistant treatment structure is provided in which a flexible layer is provided on the sheet member that is pressed against the inner circumferential surface of the opening by the restoring force of the sheet member, which has been deformed into a sleeve shape, and deforms to conform to the shape of the inner circumferential surface of the opening.

2. The fire-resistant treatment structure according to claim 1, wherein the flexible layer constitutes at least a part of the outer circumference of the sheet member in a sleeve-shaped deformed state.

3. The fire-resistant treatment structure according to claim 1 or 2, wherein the sheet member has a laminated structure of two or more layers including the flexible layer and the fire-resistant material layer.

4. The fire-resistant treatment structure according to claim 1 or 2, wherein the sheet member has a laminated structure of three or more layers including the flexible layer, the fire-resistant material layer, and the base material layer.

5. The fire-resistant treatment structure according to claim 4, wherein the sheet member has a laminated structure in which the fire-resistant material layer, the base material layer, and the flexible layer are arranged in that order.

6. The aforementioned sheet member has a surface layer, The fire-resistant treatment structure according to claim 1 or 2, wherein the surface layer constitutes at least a part of the inner circumferential surface of the sheet member in a sleeve-shaped deformed state.

7. The fire-resistant treatment structure according to claim 1 or 2, wherein the flexible layer has slits in the portion that constitutes the outer surface when it is deformed into a sleeve shape.

8. The aforementioned sheet member is equipped with a locking portion, The fire-resistant treatment structure according to claim 1 or 2, wherein the locking portion contacts the partition material when the sheet member is inserted into the opening in a sleeve-like shape, and defines the installation position of the sheet member relative to the partition material.

9. The fire-resistant treatment structure according to claim 1 or 2, wherein the sheet member comprises a functional layer.

10. The fire-resistant treatment structure according to claim 1 or 2, further comprising a cover member that closes at least a portion of the gap between the opening and the insertion body.

11. The cover member comprises a flexible cover layer, The fire-resistant treatment structure according to claim 10, wherein the cover flexible layer is positioned in contact with the insertion body and deforms to conform to the shape of the insertion body.

12. The cover member has a slit, according to the fire-resistant treatment structure of claim 10.

13. The fire-resistant treatment structure according to claim 10, wherein the cover member comprises a functional layer.

14. A fire-resistant treatment material used to make the partition section of a building, which is made of a partition material with an opening formed in it, a fire-resistant structure, The sheet member comprises having at least a flexible layer and a fire-resistant layer, being deformable from a sheet shape to a sleeve shape, and being in a sleeve shape when the ends of a single or multiple member are facing each other, or when the ends of a single or multiple member overlap, at least a portion of the sheet member is inserted into the opening, an inserting body is passed through the inside, and the sheet member is arranged along the inner circumferential surface of the opening. The sheet member, which is deformed into a sleeve shape, is pressed against the inner surface of the opening by a restoring force that returns it to its sheet shape, and deforms to conform to the shape of the inner surface of the opening, in a fire-resistant treated material.

15. A method for constructing a fire-resistant structure in a partition section of a building using a partition material with an opening formed therein, A process of transforming a sheet member having a fire-resistant layer and being deformable from a sheet to a sleeve shape into a sleeve shape by facing the ends of a single member or multiple members toward each other, or by overlapping the ends of a single member or multiple members, The sheet member includes the steps of: inserting at least a portion of it into the opening in a sleeve-like shape, passing a through body inside it, and positioning it along the inner circumferential surface of the opening; A method for constructing a fire-resistant structure, wherein the sheet member, which is deformed into a sleeve shape, is pressed against the inner surface of the opening by a restoring force that returns it to a sheet shape, and the flexible layer provided on the sheet member deforms to conform to the shape of the inner surface of the opening.

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