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 allow for the construction of a partition material with an opening for passing through an insertion object, enabling a closed structure on the back side of the construction by constructing it on one side, thereby reducing variations in fire resistance performance and maintaining sufficient fire resistance performance. [Solution] A fire-resistant treatment structure for a partition in a building using a partition material 100 having an opening 101, comprising a sleeve-shaped member 3 formed into a cylindrical shape by bringing the ends of one or more base layers 1 facing each other, or overlapping the ends of one or more base layers 2, of a laminated sheet having at least a base layer 1 and a cover layer 2, wherein an insertion body 21 is passed through the inside of the sleeve-shaped member 3, and at least a part of the cover layer 2 is spaced apart from the base layer 1 and arranged inside the sleeve-shaped member 3 as a first cover material 2A in contact with the insertion body 21.

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 walls, ceilings, and floors may be provided with partition penetration parts for passing long insertion bodies such as cables and pipes. When a fire breaks out in any partition, it is required to have a structure (fireproof structure) with fire prevention measures to prevent the spread of fire to other partitions.

[0003] As a method of making the partition penetration part a fireproof structure, for example, a method of filling an amorphous filler such as 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 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 fireproof putty may shift from its appropriate position where it was installed. Thus, when the fireproof putty or the like shifts from its appropriate position, it becomes difficult to exhibit the fireproof performance desired for the fireproof treatment structure of the partition penetration part. 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 fills the opening securely. If the filling is insufficient, it becomes difficult to achieve the fireproof performance desired for the fireproof treatment structure of the partition penetration part. Furthermore, while a construction method that completes fireproofing with one-sided construction contributes to labor savings and reduces labor costs, it is difficult to create a closed structure on the back side of the construction. This results in a structure with visible, open voids, which may lead to problems such as noise, light leakage, and rodent infestations. [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, which allow for a partition material having an opening for passing through an insertion body, enabling a closed structure on the back side of the construction with one-sided construction, thereby reducing variations in fire resistance performance and maintaining sufficient fire resistance performance. [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 sleeve-shaped member formed by making a laminated sheet having at least a base layer and a cover layer into a tubular shape by facing the ends of one or more of the base layers toward each other, or overlapping the ends of one or more of the base layers, wherein an insertion body is passed through the inside of the sleeve-shaped member, and at least a part of the cover layer is arranged inside the sleeve-shaped member as a first cover material, spaced apart from the base layer and in contact with the insertion body. [2] The fire-resistant treatment structure according to [1], wherein the base layer comprises a fire-resistant material. [3] The fire-resistant treatment structure according to [1] or [2], wherein the laminated sheet has at least a portion of multiple layers of either the base layer or the cover layer. [4] The fire-resistant treatment structure according to any one of [1] to [3], wherein the laminated sheet has a cover layer that extends outward from the base layer in at least a portion of the axial direction when it is formed into a tube. [5] The fire-resistant treatment structure according to any one of [1] to [4], wherein at least a portion of the cover layer is spaced apart from the base layer in a portion different from the first cover material and is arranged in contact with the insertion body as a second cover material to close the gap between the opening and the insertion body. [6] The fire-resistant treatment structure according to [1] or [5], wherein the laminated sheet has slits in the cover layer at locations that are at least one of the first cover material and the second cover material. [7] The fire-resistant structure according to [1] or [5], wherein the laminated sheet has an adhesive portion on the cover layer at a location that is at least one of the first cover material and the second cover material. [8] The fire-resistant treatment structure according to [1] or [5], wherein the laminated sheet has a shape-retaining portion in the cover layer at a location that is at least one of the first cover material and the second cover material. [9] The fire-resistant structure according to any one of [1] to [8], wherein the sleeve-shaped member is in contact with the partition material and further comprises a locking portion that can define the installation position relative to the partition material.

[10] The fire-resistant treatment structure according to [1], wherein a functional member is arranged in contact with the first cover material.

[11] The fire-resistant treatment structure according to [5], wherein a functional member is arranged in contact with the second cover material.

[12] The fire-resistant treatment structure according to [5], wherein a fire-resistant filler is placed between the first cover material and the second cover material.

[13] A fire-resistant material used to make a partition of a building with an opening formed by a partition material a fire-resistant structure, comprising a sleeve-shaped member formed by making a laminated sheet having at least a base layer and a cover layer into a tubular shape by facing the ends of one or more of the base layers toward each other, or overlapping the ends of one or more of the base layers, wherein an insertion body is passed through the inside of the sleeve-shaped member, and at least a part of the cover layer is arranged inside the sleeve-shaped member as a first cover material, spaced apart from the base layer and in contact with the insertion body.

[14] A method for constructing a fire-resistant structure in a partition of a building with an opening formed in a partition material, comprising the steps of: preparing a sleeve-shaped member by forming a tubular shape from a laminated sheet having a base layer and a cover layer by facing the ends of one or more base layers toward each other, or overlapping the ends of one or more base layers; arranging the sleeve-shaped member so that an insertion body is passed through its interior; and separating at least a part of the cover layer from the base layer as a first cover material, and arranging the first cover material in contact with the insertion body inside the sleeve-shaped member. [Effects of the Invention]

[0008] According to the present invention, in a partition material provided with an opening for passing through an insertion body, it is possible to create a closed structure on the back side of the installation by installing on one side, thereby reducing variations in fire resistance performance and maintaining sufficient fire resistance performance. This provides a fire-resistant treatment structure, a fire-resistant treatment material, and a method for installing a fire-resistant treatment structure. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1(a) is a perspective view showing the configuration of a fire-resistant treatment structure according to the first embodiment of the present invention, and Figure 1(b) is a cross-sectional view of the fire-resistant treatment structure according to the first embodiment of the present invention. [Figure 2]FIG. 1(a) is a perspective view showing a laminated sheet used for a fireproof treatment structure according to the first embodiment of the present invention, and FIG. 1(b) is a perspective view showing a sleeve-shaped member formed by the laminated sheet. [Figure 3] It is a perspective view of a laminated sheet according to a modification of the first embodiment of the present invention. [Figure 4] It is a perspective view showing a sleeve-shaped member according to a modification of the first embodiment of the present invention. [Figure 5] It is a cross-sectional view of a fireproof treatment structure according to a modification of the first embodiment of the present invention. [Figure 6] FIG. 6(a) is a perspective view showing a laminated sheet used for a fireproof treatment structure according to the second embodiment of the present invention, and FIG. 2(b) is a perspective view showing a sleeve-shaped member formed by the laminated sheet. [Figure 7] It is a cross-sectional view of a fireproof treatment structure according to a modification of the second embodiment of the present invention. [Figure 8] It is a perspective view of a laminated sheet according to other embodiments of the present invention. [Figure 9] FIG. 9(a) is a perspective view showing a laminated sheet used for a fireproof treatment structure according to other embodiments of the present invention, and FIG. 9(b) is a cross-sectional view of a fireproof treatment structure according to other embodiments of the present invention. [Figure 10] FIG. 10(a) is a perspective view showing a laminated sheet used for a fireproof treatment structure according to other embodiments of the present invention, and FIG. 10(b) is a cross-sectional view of a fireproof treatment structure according to other embodiments of the present invention. [Figure 11] It is a cross-sectional view of a fireproof treatment structure according to other embodiments of the present invention. [Figure 12] It is a cross-sectional view of a fireproof treatment structure according to other embodiments of the present invention. [[ID=z31]] [Embodiments for Carrying Out the Invention]

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

[0011] [First Embodiment] As shown in Figure 1, the partition material 100 in the fire-resistant structure according to the first embodiment of the present invention is a member that separates a section (a first section A and a second section B) on the wall surface of a building. Examples of the partition material 100 include gypsum board, ALC board, extruded cement board, lightweight wood wool cement board, wood chip cement board, metal sandwich panel, calcium silicate board, slate board, concrete, brick, glass, and metal plate (e.g., aluminum, iron). The partition material 100 is provided with an opening 101 for passing through insertion bodies 21 (21A, 21B) such as cables and pipes. The shape of the opening 101 is not particularly limited as long as it is possible to pass the insertion bodies through it, and may be, for example, circular, elliptical, rectangular, or a shape similar thereto. The partition material 100 has a partition penetration formed by the opening 101, and the partition penetration is treated by closing it with a partition penetration treatment material. In this embodiment, the partition penetration treatment material is composed of a sleeve-shaped member 3, which will be described later.

[0012] As shown in Figures 1 and 2, the fire-resistant structure according to the first embodiment of the present invention provides a fire-resistant structure for a partition in a building made of a partition material 100 having an opening 101. A through-body 21 is inserted through the partition material 100 having the opening 101, and a fire-resistant treatment material is arranged to close the gap between the opening 101 and the through-body 21. The fire-resistant treatment material is a member that closes at least a part of the gap between the opening 101 and the through-body 21, and constitutes at least a part of the partition penetration treatment material, and in this embodiment it is composed of a sleeve-shaped member 3 which will be described later. In the fire-resistant structure, it is preferable that the members constituting the fire-resistant treatment material have fire-resistant material.

[0013] The sleeve-shaped member 3 is formed by aligning the ends of a single base layer 1 or overlapping the ends of a single base layer 1, as shown in Figure 2(b), on a laminated sheet 10 having a base layer 1 as shown in Figure 2(a) and a cover layer 2 laminated on at least one surface of the base layer 1. The sleeve-shaped member 3 may also be formed by aligning the ends of multiple base layers 1 as they face each other or overlapping the ends of multiple base layers 1. Therefore, it is preferable to align or overlap the ends of a single base layer 1 and, for example, a laminated body described later, any of the ends of multiple base layers 1. Of course, the ends that are aligned or overlapped may have different structures. As shown in Figure 1, the sleeve-shaped member 3 is preferably positioned so that the insertion body 21 is passed through its interior and its outer circumference is in contact with the inner surface of the opening 101 of the partition material 100. The sleeve-shaped member 3 only needs to extend to at least both ends of the opening 101 (i.e., both outer surfaces of the partition material 100), and may extend beyond the outer surface of the partition material 100. Furthermore, from the viewpoint of improving fire resistance, it is preferable that the sleeve-shaped member 3 is in contact with the inner surface of the opening 101 from end to end. The sleeve-shaped member 3, formed by shaping the laminated sheet 10 into a cylinder, allows for increasing or decreasing the size of the internal space through which the insertion body 21 is inserted. When the laminated sheet 10 is shaped into a cylinder, the ends of one or more base layers 1 may be joined together. In this case, the ends may be joined together with an adhesive, adhesive tape, etc. Here, the adhesive, adhesive tape, and adhesive material are preferably non-combustible, semi-non-combustible, or flame-retardant, and it is preferable to incorporate a flame retardant into the adhesive, adhesive, etc. The adhesive tape comprises a base material and an adhesive layer provided on one side of the base material, and it is preferable that the base material and the adhesive layer, respectively, are composed of a non-combustible, semi-non-combustible, or flame-retardant material. The thickness of the laminated sheet 10 is not particularly limited, but is, for example, 0.2 to 10 mm, preferably 0.5 to 6 mm. The laminated sheet 10 is preferably in the form of a flat sheet before installation, as shown in Figure 2, but it may also have a shape other than a flat sheet, such as a C-shape.

[0014] Before construction, the cover layer 2 is laminated on the base layer 1, but at least a portion of the cover layer 2 can be separated from the base layer 1, as shown in Figure 1(b). This separated portion functions as the first cover material 2A, which is positioned inside the sleeve-shaped member 3 in contact with the insertion body 21. By positioning the first cover material 2A in contact with the insertion body 21, the opening 101 of the partition material 100 can be closed by the first cover material 2A, thereby improving fire resistance. The first cover material 2A preferably surrounds the insertion body 21 all around, thereby properly closing the opening 101. While it is preferable for the first cover material 2A to be in direct contact with the insertion body 21, it may also be in contact with the insertion body 21 via a fixing member as described later. However, in this specification, even in such cases, the first cover material 2A is considered to be in contact with the insertion body 21. As shown in Figure 2(a), the cover layer 2 has a region R1 that is bonded to the base layer 1 and a region R2 that is not bonded to the base layer 1. The boundary between region R1 and region R2 acts as a starting point 2P, allowing a portion of the cover layer 2 (region R2) to be separated from the base layer 1, and this portion of the cover layer 2 (region R2) functions as the first cover material 2A.

[0015] The first cover material 2A is preferably configured to be closely fixed to the insertion body 21 in order to reduce variations in fire resistance and maintain sufficient fire resistance. The first cover material 2A and the insertion body 21 can be closely fixed by providing fixing members such as an adhesive part, a magnetic part, putty, caulking material, or fastener between the first cover material 2A and the insertion body 21. The adhesive part uses, for example, an acrylic adhesive, a urethane adhesive, a rubber adhesive, a silicone resin adhesive, or double-sided tape to closely fix the first cover material 2A and the insertion body 21 by adhesive force. The magnetic part uses magnetic force to closely fix the first cover material 2A and the insertion body 21. Putty and caulking material are used to closely fix the first cover material 2A and the insertion body 21 by filling the gap between them. The fastening material is used to physically secure the first cover material 2A and the insertion body 21 together using screws, staples, etc., thereby ensuring a close fit. The first cover material 2A may be fixed to the insertion body 21 by a fixing member positioned on the outside of the first cover material 2A. In this case, the fixing member may be a string-like member or a tape member. The fixing member, such as the string-like member or tape member, may be fixed by wrapping it around the outside of the first cover material 2A, for example. The tape member is not particularly limited as long as it is a strip-shaped member, and may be paper tape, plastic film, metal foil, etc., but it is preferably adhesive tape. Examples of string-like members include metal wire, twisted ties (registered trademark), and other string-like members.

[0016] The base layer 1 that constitutes the base of the sleeve-shaped member 3 may contain at least one of a fire-resistant material and a non-combustible material. The non-combustible material is defined in the Building Standards Act and the Building Standards Act Enforcement Order. The thickness of the base layer 1 is not particularly limited, but is, for example, 0.1 to 20 mm, preferably 0.5 to 10 mm.

[0017] More specifically, the base layer 1 only needs to have at least one layer selected from the group consisting of a substrate or a fire-resistant layer, and may be a laminate having at least a substrate and a fire-resistant layer, or a laminate having at least one of the substrate and the fire-resistant layer and other layers. It is preferable that the base layer 1 has at least a fire-resistant layer. The fire-resistant material constituting the fire-resistant layer is a thermally expandable member that expands when heated. The thermally expandable member prevents the spread of fire by expanding in the event of a fire. It is preferable that the thermally expandable member is formed from a thermally expandable resin composition, as will be described later. The thickness of the fire-resistant layer is not particularly limited, but is for example 0.1 to 15 mm, preferably 0.5 to 8 mm.

[0018] The base material provides rigidity to the base layer 1, improving its handling and ability to maintain its installation position. When the base layer 1 has a configuration comprising a base material and a fire-resistant layer, the base material can suppress the expansion of the fire-resistant layer and control the shape of the expanded fire-resistant layer. Examples of base materials include metals such as aluminum, copper, and steel; metal foil composites such as glass cloth and aluminum glass cloth composites; paper; cloth; and resin films. When the base material is metal, it is preferable that the base material be a steel sleeve; therefore, the base layer 1 may be a metal sleeve such as a steel sleeve with a fire-resistant layer laminated on top. From the viewpoint of fire resistance, the base material is preferably made of a non-combustible material, and preferred specific examples include metal foil and metal foil composite. If the base layer 1 does not have a fire-resistant layer, it is preferable to have a base material made of a non-combustible material.

[0019] The thickness of the substrate is not particularly limited, but is, for example, 0.01 to 1 mm, preferably 0.05 to 0.5 mm. By having the substrate thickness within the above range, the base layer 1 can be given appropriate flexibility and rigidity.

[0020] The base layer 1 may have layers other than the substrate and fire-resistant layer described above, and may also have an adhesive layer, a cushioning layer, etc. as appropriate. The cushioning layer provides flexibility to the base layer 1 and improves its ability to conform to the unevenness of the member on which the base layer 1 is placed. The cushioning layer is often made of foam, and is preferably made of flame-retardant foam. Examples of foams include urethane foam, phenolic foam, styrene foam, PVC foam, and polyolefin foams such as polyethylene foam, cross-linked polyethylene foam, and polypropylene foam, as well as synthetic rubber, with urethane foam being preferred. Flame-retardant foam is made by compounding these foams with a flame retardant. The thickness of the cushioning layer is, for example, 0.01 to 10 mm, preferably 0.05 to 5 mm. Having the cushioning layer thickness within this range provides appropriate conformability.

[0021] When the adhesive layer is placed in the outermost layer, it functions to adhere the base layer 1 itself to other components (for example, partition materials), and when placed in the inner layers, it functions to bond adjacent layers to each other. For example, it may bond the base material to the fire-resistant layer, or the base material to the cushion layer, or the cushion layer to the fire-resistant 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.

[0022] (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.

[0023] 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).

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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 substrate, a release sheet, or other support, and dried and cured as appropriate to form a fire-resistant layer (heat-expandable member) on one surface of the support. Alternatively, the fire-resistant layer may be formed on one surface of the support by known methods such as extrusion molding. The fire-resistant layer formed on the release sheet can be peeled off the release sheet to obtain a base layer 1 consisting of a single layer of fire-resistant material. Then, after peeling off the release sheet, it can be laminated onto another layer to obtain a multilayer base layer 1. Alternatively, it may be laminated onto other layers while still laminated on the release sheet or other support.

[0035] The cover layer 2 may consist of a single layer of fire-resistant material, a single layer of non-combustible material, or both a fire-resistant material layer and a non-combustible material layer. However, it is preferable to have a non-combustible material layer, and more preferably to consist of a non-combustible material layer. The cover layer 2 may also have layers other than the fire-resistant material layer and the non-combustible material layer. Examples of such layers include a material layer made of a material other than a non-combustible material, an adhesive layer, and so on. The cover layer 2 preferably includes metal foil such as aluminum foil, glass cloth, or a metal foil composite which is a composite of metal foil and glass cloth such as aluminum glass cloth. These constitute a non-combustible material layer. Among these, aluminum glass cloth is more preferred from the viewpoint of fire resistance. The thickness of the non-combustible material layer is not particularly limited, but is, for example, 0.01 to 1 mm, preferably 0.05 to 0.5 mm. Having a thickness of the non-combustible material layer below these upper limits provides flexibility to the cover material 2. Therefore, the cover layer 2 can be wrapped around the outer circumference of the insert 21 while being in close contact with it, even if it has a non-combustible material layer. In addition, having a thickness above the lower limit makes it easier to ensure fire resistance.

[0036] At least a portion of the cover layer 2 is preferably a deformable sheet that covers the insert 21, as described above, but it is preferable that it is thinner than the base layer 1 to provide flexibility and facilitate deformation. The thickness of the cover layer 2 is not particularly limited, but is, for example, 0.01 to 1 mm, preferably 0.05 to 0.5 mm.

[0037] The fire-resistant layer used in the cover layer 2 is preferably 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 the thermally expandable resin composition described above. The fire-resistant layer may also be adhesive. The thickness of the fire-resistant layer is not particularly limited, but is, for example, 0.01 to 1 mm, preferably 0.05 to 0.5 mm. Having a fire-resistant layer with a thickness below these upper limits provides flexibility to the cover layer 2. Therefore, even though the cover layer 2 has a fire-resistant layer, it can be wrapped around the outer circumference of the insertion body 21. Furthermore, having a thickness above the lower limit makes it easier to ensure fire resistance.

[0038] The cover layer 2 may have an adhesive fire-resistant layer or an adhesive layer. The adhesive fire-resistant layer and the adhesive layer may constitute the outermost layer of the cover layer 2. With the above configuration, the cover layer 2 can be fixed to the insertion body 21 without using a fixing member as a separate component from the cover layer 2. Furthermore, by making the fire-resistant material layer itself adhesive, it is not necessary to provide an adhesive layer, thus further simplifying the structure of the cover layer 2. Furthermore, if the outermost layer of the cover layer 2 is provided with an adhesive fire-resistant material layer or an adhesive layer, a release sheet may be attached to that outermost layer. The release sheet should ideally be peeled off from the outermost layer when in use.

[0039] It is preferable that at least one of the base layer 1 and the cover layer 2 has a fire-resistant material (fire-resistant layer). Having at least one of the base layer 1 and the cover layer 2 has a fire-resistant material allows the fire-resistant material to be given appropriate fire resistance. Furthermore, it is preferable that the base layer 1 has a fire-resistant layer, and more preferably that the base layer 1 has a fire-resistant layer and the cover layer 2 has a non-combustible material layer, and even more preferably that the cover layer 2 has a non-combustible material layer and does not have a fire-resistant layer. Having a fire-resistant layer in the base layer 1 allows the base layer 1 to expand in the event of a fire, forming a more appropriate fire-resistant structure, and having a non-combustible material layer in the cover layer 2 makes it easier for the cover layer 2 to form an appropriate sealing structure inside the sleeve-shaped member 3.

[0040] [Construction method] In the construction method of the fire-resistant structure in this embodiment, first, as shown in Figure 2, a sleeve-shaped member 3 is prepared by forming a laminated sheet 10 consisting of at least one base layer and one cover layer 2 into a cylindrical shape by facing the ends of one or more base layers 1 towards each other, or by overlapping the ends of one or more base layers 1. Then, the sleeve-shaped member 3 is positioned with an insertion body passed through it and its outer circumference in contact with the inner surface of the opening 101 of the partition material 100.

[0041] Next, at least a portion of the cover layer 2 is separated from the base layer 1 as the first cover material 2A, and the separated first cover material 2A is positioned inside the sleeve-shaped member 3 in contact with the insertion body 21. In this step, the first cover material 2A is positioned along the insertion body 21, and fixing members such as adhesive parts, magnetic parts, putty, caulking material, and fasteners are provided between the first cover material 2A and the insertion body 21, thereby allowing the first cover material 2A and the insertion body 21 to be fixed in close contact. Alternatively, the first cover material 2A can be positioned along the insertion body 21 and fixed in close contact with the insertion body 21 by fixing members such as string-like members and tape members placed on the outside of the first cover material 2A.

[0042] The first cover material 2A may be pushed along the insertion body 21 towards the back side of the installation and fixed to the insertion body 21 by a fixing member inside the sleeve member 3, thereby creating a closed structure on the back side of the installation. Alternatively, the first cover material 2A may be fixed to the insertion body 21 and then pushed along the insertion body 21 towards the back side of the installation to create a closed structure on the back side of the installation. Considering that the first cover material 2A will be pushed along the insertion body 21 towards the back side of the installation after being fixed by a fixing member, a means of fixing the first cover material 2A to the insertion body 21 by a fixing member such as a string-like member or a tape member is preferred.

[0043] According to the fire-resistant treatment structure of this embodiment, the sleeve-shaped member 3 is positioned in contact with the inner circumferential surface of the opening 101 in the partition of the building, and the first cover material 2A is positioned in contact with the insertion body 21 inside the sleeve-shaped member 3, thereby improving the workability of the fire-resistant treatment material that provides fire resistance. Furthermore, a portion of the sleeve-shaped member 3 and the first cover material 2A can be seen from the outside, allowing confirmation that the fire-resistant treatment material has been reliably installed and that fire resistance has been applied. In addition, even with one-sided construction, the first cover material 2A can be positioned in contact with the insertion body 21 inside the sleeve-shaped member 3, so the back side of the construction can be made into a closed structure.

[0044] [Modified version of the first embodiment] In the first embodiment, the laminated sheet 10 was shown with a base layer 1 and a cover layer 2, each being a single layer, and having a length equal to the axial direction when formed into a cylinder (see Figure 2(a)). However, the laminated sheet 10 can have various configurations, as shown in Figure 3. For example, the laminated sheet 10A shown in Figure 3(a) has a configuration in which the cover layer 2 extends outward from the base layer 1 in at least a portion of the axial direction when it is formed into a cylinder. The laminated sheet 10B shown in Figure 3(b) has a configuration in which the cover layer 2 extends outward from the base layer 1 in at least a portion of the axial direction when it is formed into a cylinder, and the cover layer 2 covers one side of the base layer 1. As shown in Figures 3(a) and (b), the portion of the cover layer 2 that extends outward from the base layer 1 (extended portion) functions as a cover material separated from the base layer 1, as will be explained later with reference to Figure 5.

[0045] The laminated sheet 10C shown in Figure 3(c) has a configuration in which the base layer 1 extends outward from the cover layer 2 in at least a portion of the axial direction when the sheet is formed into a cylinder. The laminated sheet 10D shown in Figure 3(d) has a configuration in which the base layer 1 extends outward from one side of the cover layer 2 in at least a portion of the axial direction when the sheet is formed into a cylinder, and the cover layer 2 covers the other side of the base layer 1.

[0046] The laminated sheet 10E shown in Figure 3(e) has a configuration in which multiple layers of cover layer 2 are laminated in the thickness direction in at least a portion of the area, and the base layer 1 extends outward from one side of the cover layer 2 in at least a portion of the axial direction when the sheet is cylindrical. In the laminated sheet 10E, one cover layer 2 is placed from one surface of the base layer 1, covering one side, to the other surface, so that the cover layer 2 is laminated on both sides of the base layer 1.

[0047] The laminated sheet 10F shown in Figure 3(f) has a configuration similar to the laminated sheet 10E shown in Figure 3(e), in which two cover layers 2 are laminated in the thickness direction, and the base layer 1 extends outward from one of the cover layers 2 in at least a portion of the axial direction when formed into a cylinder, and has a length equal to that of the other cover layer 2 in the axial direction when formed into a cylinder.

[0048] The laminated sheet 10G shown in Figure 3(g) has a configuration similar to the laminated sheet 10E shown in Figure 3(e), in which two cover layers 2 are laminated in the thickness direction, and the base layer 1 extends outward from one of the cover layers 2 in at least a portion of the axial direction when the sheet is cylindrical, and the other cover layer 2 extends outward from the base layer 1 in at least a portion of the axial direction when the sheet is cylindrical. In Figure 3, the base layer 1 is shown as a single layer, but it is also possible to have a configuration in which multiple base layers 1 are stacked in at least a portion of the structure.

[0049] Here, using the laminated sheet 10G shown in Figure 3(g), we illustrate a fire-resistant treatment structure when two cover layers 2 are laminated in the thickness direction in the laminated sheet. The sleeve-shaped member 3 is formed by arranging the laminated sheets 10G that make up the base layer 1 and cover layer 2 shown in Figure 3(g) into a cylindrical shape by facing the ends of a single base layer 1 towards each other, or by overlapping the ends of a single base layer 1, as shown in Figure 4. Alternatively, the sleeve-shaped member 3 may be formed by facing the ends of multiple base layers 1 towards each other, or by overlapping the ends of multiple base layers 1, to create a cylindrical shape. As shown in Figure 5, at least a portion of the cover layer 2 is separable from the base layer 1 as the first cover material 2A, and the first cover material 2A is positioned in contact with the insertion body 21 inside the sleeve-shaped member 3. Specifically, the cover layer 2 laminated on one surface is laminated to the base layer 1 before construction, but the laminated portion is separated and positioned in contact with the insertion body 21 as the first cover material 2A. Furthermore, at least a portion of the cover layer 2 is separate from the base layer 1 as the second cover material 4A, and the second cover material 4A is positioned in contact with the insertion body 21 so as to close the gap between the opening 101 and the insertion body 21. Here, the portion of the cover layer 2 constituting the second cover material 4A is preferably a portion different from the first cover material 2A in the axial direction of the sleeve-shaped member 3. More specifically, the portion of the cover layer 2 that extends outward from the base layer 1 (extended portion) can move away from the base layer 1, with the end of the base layer 1 as the starting point 4P, and a part of the cover layer 2 (extended portion) functions as a second cover material 4A. Note that the configurations shown in Figures 3(a) to 3(g) may be combined as appropriate.

[0050] The second cover material 4A is preferably configured to be closely fixed to the insertion body 21 in order to reduce variations in fire resistance and maintain sufficient fire resistance. By providing fixing members such as an adhesive part, a magnetic part, putty, caulking material, or fastener between the second cover material 4A and the insertion body 21, the second cover material 4A and the insertion body 21 can be closely fixed. The adhesive part uses, for example, an acrylic adhesive, a urethane adhesive, a rubber adhesive, a silicone resin adhesive, or double-sided tape to closely fix the second cover material 4A and the insertion body 21 by adhesive force. The magnetic part closely fixes the second cover material 4A and the insertion body 21 by magnetic force. Putty and caulking material closely fix the second cover material 4A and the insertion body 21 by filling the gap between them. The fastening material securely fastens the second cover material 4A and the insertion body 21 together by physically fixing them using screws, staples, wire members, etc. The second cover material 4A may be fixed to the insertion body 21 by a fixing member positioned on the outside of the second cover material 2A. In this case, the fixing member may be a string-like member or a tape member. The fixing member, such as the string-like member or tape member, may be fixed by wrapping it around the outside of the first cover material 2A, for example. The tape member is not particularly limited as long as it is a strip-shaped member, and may be paper tape, plastic film, metal foil, etc., but adhesive tape is preferred. Examples of string-like members include metal wire, twisted ties (registered trademark), and other string-like members. The second cover material 4A may be fixed to the insertion body 21 and then pushed inward along the insertion body 21 into the base layer 1. This allows the fixed portion to be positioned on the inside of the base layer 1, improving the appearance on the construction side. Considering pushing it inward along the insertion body 21 into the construction back side, it is preferable to fix the second cover material 4A to the insertion body 21 with a fixing member such as a string or tape. However, in this modified example, it is preferable to position the second cover material 4A on the outside of the base layer 1, as shown in Figure 5. By positioning it on the outside, the expansion of the base layer 1, which has fire-resistant material, in the event of a fire is not hindered by the second cover material 4A, and the fire resistance performance can be improved.

[0051] [Second Embodiment] Next, a second embodiment of the present invention will be described in detail. As shown in Figure 6(a), the laminated sheet 10H used as the fire-resistant material in the fire-resistant structure according to the second embodiment has a configuration in which multiple layers of individual cover layers 2 and 4 are laminated in the thickness direction, at least in part, sandwiching the base layer 1. One cover layer 2 has a length equal to that of the base layer 1 in the axial direction when it is formed into a cylinder, while the other cover layer 4 is laminated only on a part of the end of the base layer 1 and extends in one direction in the axial direction when it is formed into a cylinder. The differences between the second embodiment and the first embodiment will be described below. Also, parts that are omitted from the description are the same as in the first embodiment. In the following description, the same reference numerals are used for members having the same configuration as in the first embodiment.

[0052] The sleeve-shaped member 3 is formed by arranging the laminated sheets 10H that make up the base layer 1 and cover layers 2 and 4 shown in Figure 6(a) into a cylindrical shape by facing the ends of a single base layer 1 towards each other, or by overlapping the ends of a single base layer 1, as shown in Figure 6(b). Alternatively, the sleeve-shaped member 3 may be formed by facing the ends of multiple base layers 1 towards each other, or by overlapping the ends of multiple base layers 1, to create a cylindrical shape. At least a portion of the cover layer 2 is separable from the base layer 1, as shown in Figure 7, and functions as a first cover material 2A, which is positioned inside the sleeve-shaped member 3 in contact with the insertion body 21. At least a portion of the cover layer 4 can be moved so as to be separated from the base layer 1 in the axial direction of the sleeve-shaped member 3 from the first cover material 2A, and functions as a second cover material 4A. The second cover material 4A is positioned in contact with the insertion body 21 so as to close the gap between the opening 101 and the insertion body 21. One of the cover layers 4 of the laminated sheet 10H is configured to extend outward from the base layer 1 in at least a portion in the axial direction when it is formed into a cylinder, so that the end of the base layer 1 becomes the starting point 4P and a portion of the cover layer 4 (extended portion) can be moved, and a portion of the cover layer 4 (extended portion) functions as the second cover material 4A.

[0053] According to the fire-resistant treatment structure of this embodiment, the sleeve-shaped member 3 is positioned in contact with the inner circumferential surface of the opening 101 in the partition of the building, the first cover material 2A is positioned in contact with the insertion body 21 inside the sleeve-shaped member 3, and the second cover material 4A is positioned in contact with the insertion body 21 outside the sleeve-shaped member 3, thereby improving the workability of the fire-resistant treatment material that provides fire resistance. Furthermore, the sleeve-shaped member 3, the first cover material 2A, and a portion of the second cover material 4A can be seen from the outside, allowing confirmation that the fire-resistant treatment material has been reliably installed and that fire resistance has been applied. In addition, even with one-sided construction, the first cover material 2A can be positioned in contact with the insertion body 21 inside the sleeve-shaped member 3, so the back side of the construction can be made into a closed structure.

[0054] [Modified version of the second embodiment] As a variation of the second embodiment, one of the cover layers 2 does not have to be of equal length in the axial direction when formed into a cylinder, and may be shorter. Alternatively, it may be longer, in which case the portion that extends outward from the base layer 1 in at least a portion of the axial direction when formed into a cylinder may become the first cover member 2A. In this case, a portion of the part laminated on the base layer 1 is separable from the base layer 1, and the portion laminated on the base layer 1 and the extending portion may be used together as the first cover member 2A. Furthermore, the cover layer 4 may be laminated over the entire surface of the base layer 1, rather than just a part of its surface, and a portion of it may extend outward.

[0055] [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 material 100 has a configuration in which no hollow is provided, but it may also have a hollow part inside and consist of a pair of partition materials. Furthermore, although the second embodiment showed that the first cover material 2A and the second cover material 4A are provided on different surfaces of the base layer 1, the first cover material 2A and the second cover material 4A may both be provided on the same surface of the base layer 1. Also, in the above description, in the cover layer 2, the portion of the sleeve-shaped member 3 that is different from the first cover material 2A in the axial direction constitutes the second cover material 4A, but the second cover material 4A may partially overlap with the first cover material 2A in the axial direction.

[0056] As shown in Figure 8, the laminated sheet 10 may have a slit 20 in the cover layer 2 in the area that functions as the first cover material 2A. Furthermore, if the laminated sheet 10 includes a cover layer 4 as shown in the second embodiment, the slit 20 may be provided in the cover layer 4 in the area that functions as the second cover material 4A. The slit 20 is formed by an incision extending from the front to the back surface of the first cover material 2A or the second cover material 4A. The slit 20 is preferably configured to extend to the outer edge of the first cover material 2A or the second cover material 4A in order to allow the insertion body 21 to be inserted into the interior of the first cover material 2A or the second cover material 4A. The presence of slits 20 in the first cover material 2A or the second cover material 4A allows them to be wrapped tightly around the outer circumference of the insertion body 21, making it easier to ensure fire resistance. Furthermore, the presence of slits 20 in the first cover material 2A or the second cover material 4A makes it easier to wrap around the outer circumference of the insertion body 21, improving workability. Figure 8 shows the case where there is one slit 20, but there may be multiple slits 20.

[0057] As shown in Figure 9(a), the laminated sheet 10 may have an adhesive portion 7A on the cover layer 2 in the area that functions as the first cover material 2A. Furthermore, if the laminated sheet 10 includes a cover layer 4 as shown in the second embodiment, the adhesive portion 7A may be provided on the cover layer 4 in the area that functions as the second cover material 4A. The adhesive portion 7A is provided at the tip of one side of the first cover material 2A or the second cover material 4A, and as shown in Figure 9(b), it is the portion that adheres the first cover material 2A or the second cover material 4A to the insertion body 21 when the first cover material 2A or the second cover material 4A is placed on the outer circumference of the insertion body 21. The adhesive portion 7A has an adhesive layer on its outermost layer and performs the function of adhering the first cover material 2A or the second cover material 4A to the insertion body 21. The adhesive layer may be formed of an adhesive, and examples of adhesives that can be used include acrylic adhesives, urethane adhesives, rubber adhesives, silicone resin adhesives, etc. 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. The presence of an adhesive portion 7A in the first cover material 2A or the second cover material 4A allows it to be wrapped around the outer circumference of the insertion body 21 while maintaining close contact, making it easier to ensure fire resistance. Furthermore, the presence of an adhesive portion 7A in the first cover material 2A or the second cover material 4A makes it easier to wrap around the outer circumference of the insertion body 21, improving workability.

[0058] As shown in Figure 10(a), the laminated sheet 10 may have a shape-retaining portion 7B in the cover layer 2 at the location where it functions as the first cover material 2A. Furthermore, if the laminated sheet 10 includes a cover layer 4 as shown in the second embodiment, it may have a shape-retaining portion 7B in the cover layer 4 at the location where it functions as the second cover material 4A. The shape-retaining portion 7B is provided at the tip of one side of the first cover material 2A or the second cover material 4A, and as shown in Figure 9(b), when the first cover material 2A or the second cover material 4A is placed on the outer circumference of the insertion body 21, the shape-retaining portion 7B maintains the shape of the first cover material 2A or the second cover material 4A, thereby fixing the first cover material 2A or the second cover material 4A in close contact with the insertion body 21. The shape-retaining portion 7B can be any member that can maintain the shape of the first cover material 2A or the second cover material 4A, and it is preferable that it is a wire member including a wire. The wire member may be a metal wire alone, or a resin-coated wire made by coating a metal wire such as Nejiriko (registered trademark) with resin, or a wire and fiber intertwined, such as a molding, can be used. The presence of a shape-retaining portion 7B in the first cover material 2A or the second cover material 4A allows it to be wrapped tightly around the outer circumference of the insertion body 21, making it easier to ensure fire resistance. Furthermore, the presence of a shape-retaining portion 7B in the first cover material 2A or the second cover material 4A makes it easier to wrap around the outer circumference of the insertion body 21, improving workability.

[0059] As shown in Figure 11, the sleeve-shaped member 3 may further be configured to have a locking portion 6 that contacts the partition material 100 and allows for the determination of its installation position relative to the partition material 100. The locking portion 6 is provided on the base layer 1 that constitutes the sleeve-shaped member 3 and locks onto the outer circumference of the opening 101 on the outer surface of the partition material 100, thereby fixing the installation position of the sleeve-shaped 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 sleeve-shaped 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.

[0060] The first cover material 2A may be configured such that the functional member 5 is in contact with it, as shown in Figure 11. The second cover material may also be configured such that the functional member 5 is in contact with it. Functional member 5 is a member that provides various functions to the first cover material 2A or the second cover material 4A. Functional member 5 may be, for example, a thermally expandable member that provides thermal expandability, or it may be a member other than a thermally expandable member, such as 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 functional member 5, for example, foam or rubber material can be used.

[0061] The fire-resistant filler material 8 may be placed between the first cover material 2A and the second cover material 4A. The fire-resistant filler material 8 may fill only a portion of the space between the first cover material 2A and the second cover material 4A, or it may fill the entire space between the first cover material 2A and the second cover material 4A. The fire-resistant filler 8 may be a thermally expandable member as described above, or it may be a non-thermally expandable member as long as it exhibits fire resistance, such as a heat-absorbing member or a heat-insulating member. As the fire-resistant filler 8, for example, irregularly shaped members such as putty, rock wool, glass wool, cellulose fiber, insulation board, gypsum board and board scraps, extruded polystyrene foam, phenolic foam, rigid urethane foam, and non-combustible urethane foam can be used. In order to improve the handling of the irregularly shaped fire-resistant filler 8, it may be covered with an outer material. The outer material is not particularly limited as long as it is a material that can enclose the fire-resistant filler 8 and maintain the shape of the fire-resistant filler 8, for example, metals and resin materials can be used, and a resin film such as a polyolefin resin is preferred from the viewpoint of flexibility and handling. Alternatively, the outer material may form a bag and the fire-resistant filler 8 may be placed inside the bag.

[0062] In the above description, the shape of the outer circumferential surface of the sleeve-shaped 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 opening 101, and may also be rectangular or polygonal.

[0063] 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 sleeve-shaped 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 sleeve-shaped member 3 and the opening 101, the sleeve-shaped member 3 may be positioned so as to be in contact with the inner surface of the opening 101 via the gap-filling material. [Explanation of Symbols]

[0064] 100 partition material 101 Aperture 1. Base layer 2,4 Cover layer 2A First cover layer 4A Second cover layer 3 Sleeve-shaped member 10 Laminated Sheets 20 slits 5 Functional Components 6. Locking part 7A Adhesive part 7B Shape retention part 8 Refractory filler 21 Insertion body

Claims

1. A fire-resistant treatment structure for a partition section of a building using a partition material with an opening formed therein, A sleeve-shaped member is provided, which is formed by shaping a laminated sheet having at least a base layer and a cover layer into a tubular shape by facing the ends of one or more of the base layers toward each other, or by overlapping the ends of one or more of the base layers. The aforementioned sleeve-shaped member has an insertion body passed through it, A fire-resistant treatment structure in which at least a portion of the cover layer is spaced apart from the base layer and arranged as a first cover material inside the sleeve-shaped member in contact with the insertion body.

2. The fire-resistant treatment structure according to claim 1, wherein the base layer comprises a fire-resistant material.

3. The fire-resistant treatment structure according to claim 1, wherein the laminated sheet has at least a portion of the base layer and the cover layer laminated together in multiple layers.

4. The fire-resistant treatment structure according to claim 1, wherein the laminated sheet has a cover layer that extends outward from the base layer in at least a portion of the axial direction when the sheet is formed into a cylindrical shape.

5. The fire-resistant treatment structure according to claim 1, wherein at least a portion of the cover layer is spaced apart from the base layer in a portion different from the first cover material and is arranged in contact with the insertion body as a second cover material to close the gap between the opening and the insertion body.

6. The fire-resistant treatment structure according to claim 1 or 5, wherein the laminated sheet has slits in the cover layer at locations that are at least one of the first cover material and the second cover material.

7. The fire-resistant treatment structure according to claim 1 or 5, wherein the laminated sheet has an adhesive portion on the cover layer at a location that is at least one of the first cover material and the second cover material.

8. The fire-resistant treatment structure according to claim 1 or 5, wherein the laminated sheet has a shape-retaining portion in the cover layer at a location that is at least one of the first cover material and the second cover material.

9. The fire-resistant treatment structure according to claim 1, wherein the sleeve-shaped member is in contact with the partition material and further comprises a locking portion capable of defining the installation position relative to the partition material.

10. The fire-resistant treatment structure according to claim 1, wherein a functional member is arranged in contact with the first cover material.

11. The fire-resistant treatment structure according to claim 5, wherein a functional member is arranged in contact with the second cover material.

12. The fire-resistant treatment structure according to claim 5, wherein a fire-resistant filler is disposed between the first cover material and the second cover material.

13. 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, A sleeve-shaped member is provided, which is formed by shaping a laminated sheet having at least a base layer and a cover layer into a tubular shape by facing the ends of one or more of the base layers toward each other, or by overlapping the ends of one or more of the base layers. The aforementioned sleeve-shaped member has an insertion body passed through it, A fire-resistant material wherein at least a portion of the cover layer is spaced apart from the base layer and arranged as a first cover material inside the sleeve-shaped member in contact with the insertion body.

14. 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 step of preparing a sleeve-shaped member by forming a laminated sheet having a base layer and a cover layer into a tubular shape by facing the ends of one or more of the base layers toward each other, or by overlapping the ends of one or more of the base layers, The process of arranging the sleeve-shaped member so that an insertion body is passed through it, A method for constructing a fire-resistant structure, comprising the steps of: separating at least a portion of the cover layer from the base layer as a first cover material; and arranging the first cover material in contact with the insertion body inside the sleeve-shaped member.

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