Fire compartment structure for resin pipe penetrating wooden hollow floor and fireproof sleeve

Abstract

To provide a fire compartment structure compliant with statutory requirements for a wooden hollow floor in which a resin pipe is constructed.SOLUTION: Provided is a fire compartment structure for a wooden hollow floor comprising a floor material 100 forming a floor of an upper story and a ceiling material 200 forming a ceiling of a lower story with a hollow space from the floor material 100, wherein a resin pipe (straight pipe 1100) is installed so as to penetrate the wooden hollow floor, an upper thermally expandable fire-resistant material (adopting a lower fireproof sleeve 1700 as an upper fireproof sleeve) is present at a position overlapping at least the vertical thickness of the floor material 100, and a lower thermally expandable fire-resistant material different from the upper thermally expandable fire-resistant material (lower fireproof sleeve 1700) is present at a position overlapping at least the vertical thickness of the ceiling material 200.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a fire compartment structure for resin piping (sometimes referred to as resin piping) that penetrates a wooden hollow floor that has a hollow space between an upper floor as a flooring material and a lower floor as a ceiling material, and relates to a fire compartment structure that uses a thermally expandable fire-resistant material (sometimes simply referred to as a thermally expandable material or a fire-resistant material) to achieve the desired fire resistance and conform to legal regulations regarding fire resistance using resin piping, and to a fire sleeve that is a separate member from the resin piping to achieve such a fire compartment structure. Note that in the following description, the terms "fire protection" in fire sleeve etc. and "fire resistance" in fire-resistant sleeve etc. may not be clearly distinguished from each other, and in the present invention, these terms will be described as being synonymous or nearly synonymous. [Background technology]

[0002] Water supply and drainage systems are installed in apartment buildings, office buildings, etc. The most widely known drainage system is a drainage piping structure that includes vertical pipes (standpipes, upper standpipes, lower standpipes) that run vertically through each floor of the building, horizontal pipes (horizontal branch pipes, branch pipes) installed within each floor, and drainage pipe joints (also called drainage manifolds, drainage pipe joints, drainage manifold joints, or manifold joints) that connect these.

[0003] Such a drainage pipe joint has a pipe body (main body) that is placed in a through-hole in a floor slab when installed in a building, and the main body has an upper standpipe connection portion at its upper end that can be connected to an upstream upper standpipe, a horizontal branch pipe connection portion on its side that can be connected to a horizontal branch pipe, and a lower pipe connection portion at its lower end that can be connected to a downstream piping member. Many such drainage pipe joints have parts that change the flow of wastewater within the drainage pipe joint (for example, swirl vanes, straightening vanes, vane members, deflector plates, etc., which protrude from the inner surface of the pipe wall). Furthermore, drainage pipe joints formed from one or more injection-molded resin products are widely known.

[0004] In buildings equipped with drainage piping structures using such drainage pipe joints, in the event of a fire or other incident on a floor below, in order to prevent flames, soot, and toxic gases from leaking to upper floors through burned or melted parts of the drainage piping structure, heat-expandable fire-resistant material is separately attached to the drainage piping joints around the periphery of the piping material or buried within the wall of the piping material, so that in the event of a fire, the through holes in the floor slab are kept blocked by this heat-expandable fire-resistant material (forming a fire compartment structure that complies with legal regulations).

[0005] Meanwhile, in order to realize a decarbonized society, an increase in apartment buildings with wooden top floors or laminated wooden construction is expected, and there is a demand for the compartment penetrations of the wooden hollow floors installed in these apartment buildings to comply with legal regulations regarding fire resistance, prevent fire from spreading to the wooden structural members in the event of a fire, and establish equipment specifications that are easy to install.This wooden hollow floor has a hollow space between the upper floor and the lower floor used as a ceiling material, and compared to normal floor slabs (reinforced concrete (RC), lightweight aerated concrete (ALC), etc.), the thickness of the upper and lower floors is thinner and they have inferior strength and fire resistance.

[0006] In a compartment having such a hollow space, in order to pass pipes such as cables and water supply pipes (refrigerant pipes, heat medium pipes, water pipes, sewer pipes, water supply and drainage pipes, gas pipes, heating and cooling medium transfer pipes, ventilation pipes, electric cables, optical fiber cables, etc.) from one floor to another or vice versa, the pipes must be inserted through penetrations formed in the compartment, and the penetrations in the compartment must have fire resistance that complies with specified laws and regulations. For example, Japanese Patent Laid-Open Publication No. 2017-066851 (Patent Document 1) discloses a fire resistance structure for penetrations in a compartment of a building that can be reliably installed in the penetrations with simple construction work, exhibits good fire resistance, and reduces construction costs.

[0007] The fireproof structure disclosed in Patent Document 1 is a fireproof structure for a penetration portion through which a pipe is inserted and which penetrates a hollow compartment arranged horizontally within a multi-story building, the compartment comprising a floor material which forms the floor of the upper floor and a ceiling material which forms the ceiling of the lower floor and is arranged at a distance from the floor material, and a heat-expandable fireproof material is provided around the pipe on the floor material, around the pipe below the ceiling material, on the outer surface of the pipe protruding above the floor material, and on the outer surface of the pipe protruding below the ceiling material, and preferably a sealing material is provided in the through hole in the floor material and / or the through hole in the ceiling material to hide the gap between the pipe and the through hole.

[0008] According to the fireproof structure disclosed in Patent Document 1, heat-expandable fire-resistant material is provided around the pipes above the flooring, around the pipes below the ceiling, and on the outer surfaces of the pipes protruding above the flooring or below the ceiling. Even if a fire breaks out in the room and the pipes melt or burn, the heat from the fire causes the heat-expandable fire-resistant material to expand in the radial direction of the pipes (i.e., its thickness), sealing the space created by the melting or burning of the pipes. Furthermore, the expanded heat-expandable fire-resistant material shields the through-holes, and the gaps between the through-holes and the pipes are filled with a sealant, completely sealing the through-holes and the pipes in the partition, preventing flames and heat from penetrating the through-holes or the pipes and spreading the fire to other indoor spaces. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Application Publication No. 2017-066851 Summary of the Invention [Problem to be solved by the invention]

[0010] However, in the fireproof structure disclosed in Patent Document 1, highly fire-resistant materials such as ALC boards and precast concrete boards are used as floor materials, and reinforced gypsum boards, calcium silicate boards, and laminated boards made by laminating ceramic blankets or rock wool felt on gypsum boards or calcium silicate boards are used as ceiling materials, and no wooden materials are used (it is not a wooden hollow floor).

[0011] Furthermore, Patent Document 1 discloses a fireproof structure in which heat-expandable fire-resistant material is placed only at the position of the floor material (so as to face the cross section of the through-hole) in Figure 5, but no heat-expandable fire-resistant material is placed at the position of the ceiling material, which does not provide a sufficient fireproof structure. Also, Patent Document 1 discloses a fireproof structure in which heat-expandable fire-resistant material is placed at the positions of the floor material and ceiling material (so as to face the cross section of the through-hole) only in Figure 6, but the heat-expandable fire-resistant material placed in the hollow space between the floor material and the ceiling material can expand freely into the hollow space, which does not provide a sufficient fireproof structure, and in the first place, placing heat-expandable fire-resistant material in this hollow space leads to increased costs.

[0012] Furthermore, the thickness of the floor and ceiling materials in a wooden hollow floor, which has a hollow space between the upper floor as flooring material and the lower floor as ceiling material, is thinner than the normal floor slabs mentioned above (reinforced concrete (RC), lightweight aerated concrete (ALC), etc.), and even if heat-expandable fire-resistant material is placed in the position of the floor and ceiling materials (so that it faces the cross section of the through hole), due to the thin thickness of the floor and ceiling materials, it may not be possible to achieve a sufficient fire prevention structure.

[0013] In particular, if heavy metal piping is supported by a thin floor, the thin floor may be damaged in the event of a fire, making it unable to support the piping, which could cause the piping to fall. Therefore, there is a demand for installing lightweight resin piping in a wooden hollow floor to create a fire compartment structure with fire resistance that complies with legal regulations.

[0014] The present invention was developed in consideration of the above-mentioned problems, and its object is to provide a fire compartment structure that complies with legal regulations regarding the fire resistance of a compartment containing resin piping installed through a wooden hollow floor comprising a floor material that constitutes the floor of an upper floor and a ceiling material that constitutes the ceiling of a lower floor, with a hollow space between the floor material and the ceiling material, and a fire sleeve that is a separate member from the piping for realizing such a fire compartment structure.Furthermore, in consideration of the special circumstances present in wooden hollow floors, the present invention aims to solve the problems involved in construction in realizing a fire compartment structure that complies with legal regulations regarding the fire resistance of a compartment containing resin piping installed through a wooden hollow floor. [Means for solving the problem]

[0015] In order to achieve the above object, a fire compartment structure according to one aspect of the present invention employs the following technical measures.

[0016] The fire compartment structure of the present invention is a wooden hollow floor fire compartment structure comprising a floor material constituting the floor of an upper floor and a ceiling material constituting the ceiling of a lower floor provided with a hollow space from the floor material, characterized in that a resin pipe is installed to penetrate the wooden hollow floor, an upper heat-expandable fire-resistant material is present at a position overlapping at least the thickness of the floor material in the vertical direction, and a lower heat-expandable fire-resistant material different from the upper heat-expandable fire-resistant material is present at a position overlapping at least the thickness of the ceiling material in the vertical direction. Preferably, the upper heat-expandable fire-resistant material and / or the lower heat-expandable fire-resistant material are configured to be adjustable in position in the vertical direction, and the upper heat-expandable fire-resistant material can be configured to be located at the position of the floor material, and the lower heat-expandable fire-resistant material can be configured to be located at the position of the ceiling material.

[0017] More preferably, the upper heat-expandable fire-resistant material is fixed to the floor material or the piping, and the lower heat-expandable fire-resistant material is fixed to the ceiling material or the piping. More preferably, when the upper heat-expandable fire-resistant material is fixed to the floor material and / or when the lower heat-expandable fire-resistant material is fixed to the ceiling material, the upper heat-expandable fire-resistant material and / or the lower heat-expandable fire-resistant material can be configured to have a sheet-like non-combustible material on the outer layer of the heat-expandable fire-resistant material, and the sheet-like non-combustible material can be fixed to the floor material and / or the ceiling material. More preferably, a part of the outer peripheral surface of the sheet-like non-combustible material can be configured to be engaged and fixed to the upper surface of the floor material and / or the ceiling material. More preferably, the sheet-like non-combustible material can be rock wool or a steel plate.

[0018] More preferably, the upper heat-expandable fire-resistant material and / or the lower heat-expandable fire-resistant material can be configured to have either a single layer structure of an inner heat-expandable fire-resistant material, a two-layer structure having a sheet-shaped non-combustible material and an inner heat-expandable fire-resistant material in the inner layer of the sheet-shaped non-combustible material or an outer heat-expandable fire-resistant material in the outer layer of the sheet-shaped non-combustible material, or a three-layer structure having a sheet-shaped non-combustible material and an inner heat-expandable fire-resistant material in the inner layer of the sheet-shaped non-combustible material and an outer heat-expandable fire-resistant material in the outer layer of the sheet-shaped non-combustible material. More preferably, the sheet-like non-combustible material in the two-layer structure or the three-layer structure can be configured to be rock wool or steel plate.

[0019] More preferably, the gap between the floor material and the upper heat-expandable fire-resistant material, the gap between the ceiling material and the lower heat-expandable fire-resistant material, the gap between the piping and the upper heat-expandable fire-resistant material, the gap between the piping and the lower heat-expandable fire-resistant material, the outer peripheral surface of the upper heat-expandable fire-resistant material on the upper surface of the floor material, and the outer peripheral surface of the lower heat-expandable fire-resistant material on the lower surface of the ceiling material. In some locations, a heat-resistant sealant may be filled into the gap or applied to the outer peripheral surface. In order to achieve the above object, the fireproof sleeve according to another aspect of the present invention employs the following technical means.

[0020] The fire sleeve of the present invention is a fire sleeve that is a separate component from the piping for realizing the fire-resistant compartment structure, and is characterized in that it is equipped with the upper heat-expandable fire-resistant material or the lower heat-expandable fire-resistant material described in any of the above. [Effects of the Invention]

[0021] According to the present invention, it is possible to provide a fire compartment structure that complies with legal regulations regarding the fire resistance of a compartment that includes a resin pipe installed through a wooden hollow floor that includes a floor material that configures the floor of an upper floor and a ceiling material that configures the ceiling of a lower floor that is provided with a hollow space between the floor material and the ceiling material, and a fire sleeve that is a separate member from the pipe for realizing such a fire compartment structure.Furthermore, in consideration of the special circumstances that exist in wooden hollow floors, it is possible to solve the problems involved in construction to realize a fire compartment structure that complies with legal regulations regarding the fire resistance of a compartment that includes a resin pipe installed through a wooden hollow floor. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a diagram illustrating the structure of a wooden hollow floor through which piping is passed in a fire compartment structure according to an embodiment of the present invention. FIG. [Figure 2] FIG. 1A is a side view of a pipe that realizes a fire compartment structure according to an embodiment of the present invention, and FIG. 1B is a side half-sectional view of a three-layer structure type fire sleeve in which the upper thermally expandable fire-resistant material is used. [Figure 3] (A) A perspective view of a three-layer structure type of fire sleeve, which is a lower thermally expandable fire-resistant material that realizes a fire compartment structure in accordance with an embodiment of the present invention; (B) A side half-sectional view of a three-layer structure type; (C) A side half-sectional view of a two-layer structure type; and (D) A side half-sectional view of a single-layer structure type. [Figure 4] This is a side view (partial cross-sectional view) for explaining a fire compartment structure according to an embodiment of the invention, which is realized by using a single-layer structure type fire sleeve as the upper and lower thermally expandable fire-resistant materials. [Figure 5]FIG. 10 is a side view (partial cross-sectional view) for explaining a fire compartment structure according to an embodiment of the invention, which is realized by adopting a three-layer structure type fire sleeve shown in FIG. 3(B) as the upper and lower thermally expandable fire-resistant materials. [Figure 6] FIG. 2B is a side view illustrating that a fire compartment structure according to an embodiment of the invention, which is realized by using a three-layer structure type fire sleeve shown in FIG. 2B as the upper heat-expandable fire-resistant material and a three-layer structure type fire sleeve shown in FIG. 3B as the lower heat-expandable fire-resistant material, can accommodate a wide range of floor thicknesses L. [Figure 7] FIG. 10 is a diagram illustrating a vibration-preventing jig for supporting a drainage standpipe with an inlet according to a first modified example. [Figure 8] FIG. 10 is a diagram illustrating a method for attaching a reinforced gypsum board on the ceiling side according to a second modified example. DETAILED DESCRIPTION OF THE INVENTION

[0023] A fire compartment structure according to an embodiment of the present invention, in which resin piping is installed in a wooden hollow floor, will be described in detail below with reference to Figs. 1 to 6. In the following description, the outer peripheral surface, the outer surface, and the outside, the outer layer side, the outer peripheral side, and the outside, the inner layer side, the inner peripheral side, and the inside, and the thermally expandable fireproof material, the fireproof material, and the thermally expandable material may not be clearly distinguished. Also, in cross-sectional views, different components may not be clearly distinguished depending on the type of hatching. Furthermore, in the drawings, the reference numerals (consisting of numbers and letters) attached to the dashed lines with arrows indicate the drawing number, and the letters indicate the sub-numbers (A, B, C, etc.) in the drawing, and an enlarged view is shown in the drawing identified by the reference numeral (only Fig. 5). Also, as will be described in detail later, However, the upper and / or lower heat-expandable fire-resistant materials that realize the fire compartment structure of this embodiment are either a single-layer structure consisting only of an inner heat-expandable fire-resistant material (sometimes referred to as inner fire-resistant tape), a two-layer structure in which a sheet-like non-combustible material (sometimes referred to as a fire-resistant cover) is provided on the outer layer of the inner heat-expandable fire-resistant material in the single-layer structure, or a three-layer structure in which an outer heat-expandable fire-resistant material (sometimes referred to as outer fire-resistant tape) is provided on the outer layer of the sheet-like non-combustible material in the two-layer structure, and either type may be referred to as a fire sleeve or fire-resistant sleeve. Also, the height dimension parallel to the pipe axis of the piping may be referred to as the width (especially the dimension of the heat-expandable fire-resistant material).

[0024] The present invention is also characterized by the vertical positional relationship between the thermally expandable fire-resistant material for the resin piping installed in the wooden hollow floor and the floor and ceiling materials in the wooden hollow floor, and the method for fixing the thermally expandable fire-resistant material.

[0025] As will be described later, the fire compartment structure according to the present invention is realized by fixing an upper heat-expandable fire-resistant material (one to three layer upper fire sleeve) to a floor material or piping on the floor material side, which is the upper floor of the wooden hollow floor, and fixing a lower heat-expandable fire-resistant material (one to three layer lower fire sleeve) to a ceiling material or piping on the ceiling material side, which is the lower floor of the wooden hollow floor. However, the application of the present invention is not limited to wooden hollow floors as long as it is realized in this way. For example, if the hollow portion is made of CLT (Cross Laminated Tubular Laminated It is acceptable for the structure to be filled with materials such as Timber (a large wooden panel building material made by gluing together lamina so that the fiber direction intersects at right angles with each layer), or for CLT to be used for wood other than the hollow part. <Wooden hollow floor structure>

[0026] Referring to Fig. 1, a description will be given of a wooden hollow floor structure suitable for use as a fire compartment structure in which resin piping according to an embodiment of the present invention is installed in a wooden hollow floor. As shown in Fig. 1, this wooden hollow floor has a hollow space between an upper floor (hereinafter referred to as floor material 100) as a floor material and a lower floor (hereinafter referred to as ceiling material 200) as a ceiling material. As an example, floor material 100 is constructed by overlapping structural plywood 110 (thickness t = 12 mm), reinforced gypsum board 120 (thickness t = 21 mm × 2 sheets), and structural plywood 130 (thickness t = 24 mm), and ceiling material 200 is constructed by overlapping reinforced gypsum board 210 (thickness t = 25 mm) and reinforced gypsum board 220 (thickness t = 21 mm). The structure of this wooden hollow floor also includes beams 320 (cross section 120mm x 240mm) and wooden shafts 330 (cross section 38mm x 140mm). In this type of wooden hollow floor, a through hole 300 (diameter Φ160mm, as an example) is provided in the floor material 100, and a through hole 302 (diameter Φ160mm, as an example) is provided in the ceiling material 200. Also, although this is only one example, the floor thickness L, which is the distance between the upper surface of the floor (the upper surface of the floor material 100) and the lower surface of the floor (the lower surface of the ceiling material 200), is 364mm (this can accommodate a wide range of floor thicknesses, as will be described later with reference to Figure 6).

[0027] That is, this wooden hollow floor is a compartment with a hollow structure installed horizontally within a multi-story building, and the resin piping is installed in the through holes of this wooden hollow floor together with the upper heat-expandable fire-resistant material on the flooring material 100 side (upper fire-resistant sleeves for one to three layers) and the lower heat-expandable fire-resistant material on the ceiling material 200 side (lower fire-resistant sleeves for one to three layers), thereby realizing the fire compartment structure of the present invention. This compartment, the wooden hollow floor, comprises flooring material 100 that constitutes the floor of the upper floor and is composed at least in part of wooden materials (structural plywood 110, structural plywood 130 in this case), and ceiling material 200 that constitutes the ceiling of the lower floor, which is installed with a hollow space separated from the flooring material 100, and is composed of a non-combustible material. <Thermal expansion fire-resistant material (fireproof sleeve, fire-resistant sleeve)>

[0028] With reference to Figure 2, we will explain a resin piping 1000 that is suitable for installation in the wooden hollow floor shown in Figure 1. This piping 1000 includes, for example, a straight pipe 1100 that connects the piping on the upper floor with the piping on the lower floor, and an upper thermally expandable fire-resistant material provided on the straight pipe 1100.

[0029] The upper heat-expandable fire-resistant material is provided (by being attached) to the straight pipe 1100 (not to the flooring 100) as an upper fire-resistant sleeve 1600 shown in Fig. 2(B) so as to be present in a position that overlaps at least the thickness of the flooring 100 in the vertical direction, thereby forming the piping 1000. However, as will be described later, the lower fire-resistant sleeve 1700 shown in Fig. 3 may be used as the upper heat-expandable fire-resistant material and provided to the flooring 100 (in this case, the straight pipe 1100 and the upper heat-expandable fire-resistant material are separate members), but the height positions of the outer fire-resistant tape and engaging portion 1722, which are the outer heat-expandable fire-resistant material, may differ. 2(B), the upper fire-resistant sleeve 1600 has a three-layer structure including an inner fire-resistant tape 1610 (in the form of a tape or sheet), a sheet-like non-combustible material (fire-resistant cover 1620) on the outer layer of the inner fire-resistant tape 1610, and an outer fire-resistant tape 1630 (in the form of a tape or sheet) on the outer layer of the sheet-like non-combustible material. Note that, like the lower fire-resistant sleeve 1700 (described next) as the lower heat-expandable fire-resistant material, the upper fire-resistant sleeve 1600 as the upper heat-expandable fire-resistant material is not limited to the three-layer structure shown in FIG. 2(B) above, and may have a two-layer structure or a single-layer structure. That is, this upper fire-resistant sleeve 1600 may be a two-layer upper fire-resistant sleeve 1602 (not shown) obtained by removing the outer fire-resistant tape 1630 from a three-layer upper fire-resistant sleeve 1603 (Figure 2(B)) having an inner fire-resistant tape 1610 (in tape or sheet form), a sheet-like non-combustible material (fire-resistant cover 1620) on the outer layer of the inner fire-resistant tape 1610, and an outer fire-resistant tape 1630 (in tape or sheet form) on the outer layer of the sheet-like non-combustible material, or further, this upper fire-resistant sleeve 1600 may be a single-layer upper fire-resistant sleeve 1601 (not shown) having only the inner fire-resistant tape 1610 (in tape or sheet form).In this way, this upper fire-resistant sleeve 1600 as the upper heat-expandable fire-resistant material (the upper fire-resistant sleeve 1601 has a single-layer structure, the upper fire-resistant sleeve 1602 has a two-layer structure, and the upper fire-resistant sleeve 1603 has a three-layer structure, but when explaining common points, they may be referred to as the upper fire-resistant sleeve 1600), like the lower fire-resistant sleeve 1700 as the lower heat-expandable fire-resistant material described next, is not limited to the three-layer structure shown in Figure 2(B) above, and may have either a two-layer structure or a single-layer structure.

[0030] Next, the lower thermally expandable fire-resistant material will be described with reference to Figure 3. This lower thermally expandable fire-resistant material is provided on the ceiling material 200 (not on the straight pipe 1100) as a lower fire-resistant sleeve 1700 (more specifically, a lower fire-resistant sleeve 1703 having a three-layer structure, a lower fire-resistant sleeve 1702 having a two-layer structure, or a lower fire-resistant sleeve 1701 having a single layer structure, but may be referred to as the lower fire-resistant sleeve 1700 when describing common features) as a separate member from the piping used to realize the fire-resistant compartment structure of the present invention. The lower thermally expandable fire-resistant material is provided in a position that overlaps at least the vertical thickness of the ceiling material 200. However, as will be described later, the upper fire-resistant sleeve 1600 shown in Figure 2 may be used as the lower thermally expandable fire-resistant material and provided on the straight pipe 1100 (in which case the straight pipe 1100 and the lower thermally expandable fire-resistant material are one member), but the height position of the outer fire-resistant tape, which is the outer thermally expandable fire-resistant material, may be different.

[0031] As shown in Figures 3(A) and 3(B), the lower fire-resistant sleeve 1703 has a three-layer structure including an inner fire-resistant tape 1710 (in tape or sheet form), a sheet-like non-combustible material (fire-resistant cover 1720) on the outer layer of the inner fire-resistant tape 1710, and an outer fire-resistant tape 1730 (in tape or sheet form) on the outer layer of the sheet-like non-combustible material. Here, although not limited thereto, the height (width) of the inner fire-resistant tape 1710 is 105 mm, that of the fire-resistant cover is 110 mm (when the lower end is joined to the inner fire-resistant tape 1710), and that of the outer fire-resistant tape 1730 is 25 mm. The lower fire-resistant sleeve 1703 has a fastening portion 1722 (claws, claws, etc.) formed by cutting three sides of a rectangular portion of the fire-resistant cover 1720 (assumed to be a steel plate) and folding it outward. The engaging portions 1722 are engaged with the upper surface of the ceiling material 200 to attach the lower fireproof sleeve 1703 to the ceiling material 200. Here, an example in which the engaging portions 1722 are provided at four locations at 90-degree intervals is shown in Figures 3(A) and 3(B), but it is preferable to provide them at two or more locations at equal intervals.

[0032] Since a gap (internal gap) occurs between the lower fireproof sleeve 1703 and the pipe 1000 (here, the straight pipe 1100), as shown in Figures 3(B), 3(C), and 3(D), internal rock wool RWi is installed as a backup material during construction, and internal silicone sealing SSi is applied (filled). For this reason, Figures 3(B), 3(C), and 3(D) are hypothetical views of the state after construction. Note that this backup material is installed for the purposes of preventing silicone from dripping and controlling the thickness of the silicone in the vertical direction.

[0033] The lower fire-resistant sleeve 1702 shown in Fig. 3(C) has a two-layer structure in which the outer fire-resistant tape 1730 is removed from the lower fire-resistant sleeve 1703, and the lower fire-resistant sleeve 1701 shown in Fig. 3(D) has a single-layer structure in which the fire-resistant cover 1720 is removed from the lower fire-resistant sleeve 1702. The lower fire-resistant sleeve 1702 may be the lower fire-resistant sleeve 1703 from which the inner fire-resistant tape 1710 is removed. In other words, the two-layer lower fire-resistant sleeve 1702 has a two-layer structure in which the inner fire-resistant tape 1710 (in tape or sheet form) is provided on the inner layer side of the sheet-like non-combustible material (fire-resistant cover 1720), or the outer fire-resistant tape 1730 (in tape or sheet form) is provided on the outer layer of the sheet-like non-combustible material. However, when the two-layer structure does not include the inner fire-resistant tape 1710 but does include the outer fire-resistant tape 1730, an inner heat-expandable fire-resistant material is required that is provided integrally with the piping (straight pipe 1100) or provided separately from the piping (straight pipe 1100). This is also true when the two-layer upper fire-resistant sleeve 1602 does not include the inner fire-resistant tape 1610 but does include the outer fire-resistant tape 1630.

[0034] Here, the fire-resistant cover 1720 is preferably made of rock wool or steel plate. The tape- or sheet-shaped thermally expandable fire-resistant material is formed, for example, from a resin composition containing a rubber-based resin as its main component, a phosphorus compound, neutralized thermally expandable graphite, a hydrated inorganic substance, and a metal carbonate, or a resin composition containing an epoxy resin, a phosphorus compound, neutralized thermally expandable graphite, and an inorganic filler. The thermally expandable fire-resistant material may be in putty form instead of tape or sheet form. Furthermore, the thermally expandable fire-resistant material may have different compositions (characteristics) on the inside, outside, and top and bottom. <Fire compartment structure>

[0035] The fire compartment structure of this embodiment, which uses a piping 1000 with an upper fire-resistant sleeve 1600 attached to such a straight pipe 1100 or a lower fire-resistant sleeve 1700 that is a separate member from the piping 1000, will be described in detail with reference to Figures 4 to 6. In Figure 4, an upper fire-resistant sleeve 1600 (more specifically, upper fire-resistant sleeve 1601) (for one-layer type piping fixation) is used as the upper and lower heat-expandable fire-resistant material, in Figure 5, a lower fire-resistant sleeve 1700 (more specifically, lower fire-resistant sleeve 1703) (for three-layer type piping fixation) is used as the upper and lower heat-expandable fire-resistant material, and in Figure 6, an upper fire-resistant sleeve 1600 (more specifically, upper fire-resistant sleeve 1603) (for three-layer type piping fixation) is used as the upper heat-expandable fire-resistant material, and a lower fire-resistant sleeve 1700 (more specifically, lower fire-resistant sleeve 1703) (for three-layer type piping fixation) is used as the lower heat-expandable fire-resistant material. In addition, whether the lower fire-resistant sleeve 1700 is used on the upper side (the floor material 100 side) or the upper fire-resistant sleeve 1600 is used on the lower side (the ceiling material 200 side), the height positions of the outer fire-resistant tape and the fastening portion 1722, which are the outer heat-expandable fire-resistant material, may differ. As described above, the upper fire-resistant sleeve 1600 and / or the lower heat-expandable fire-resistant tape may be used as the upper heat-expandable fire-resistant material. The lower fire-resistant sleeve 1700 as the fire-resistant material is not limited to any type. In addition, in these Figs. 4 to 6, the lower part of the piping 1000 is connected to a drainage standpipe 1530 with a receiving port. In addition, in these Figs. 4 to 6, the upper thermally expandable fire-resistant material is given the reference numeral 1600, the lower thermally expandable fire-resistant material is given the reference numeral 1700, and the reference numeral of the adopted fire-resistant sleeve is given in parentheses thereafter. The following features of the fire compartment structure according to this embodiment will be described with reference to FIGS.

[0036] The fire compartment structure according to this embodiment is a wooden hollow floor fire compartment structure comprising floor material 100 constituting the floor of an upper floor and ceiling material 200 constituting the ceiling of a lower floor, which is provided with a hollow space separated from the floor material 100, and in which resin piping 100 is installed to penetrate the wooden hollow floor. The fire compartment structure is characterized in that an upper heat-expandable fire-resistant material (upper fire-resistant sleeve 1600 or lower fire-resistant sleeve 1700) is present in a position overlapping at least the vertical thickness of the floor material 100, and a lower heat-expandable fire-resistant material (upper fire-resistant sleeve 1600 or lower fire-resistant sleeve 1700) separate from the upper heat-expandable fire-resistant material is present in a position overlapping at least the vertical thickness of the ceiling material 200.

[0037] The upper heat-expandable fire-resistant material (using the lower fire-resistant sleeve 1700) and / or the lower heat-expandable fire-resistant material (using the lower fire-resistant sleeve 1700) are configured so that their positions can be adjusted in the vertical direction, with the upper heat-expandable fire-resistant material being located at the position of the floor material 100 and the lower heat-expandable fire-resistant material being located at the position of the ceiling material 200. This feature is in contrast to the upper fire-resistant sleeve 1600, which is attached to a predetermined position in the vertical direction of the straight pipe 1100 at the time of shipment from the manufacturing factory and configured as the piping 1000, as shown in Figure 2(A), and is not configured so that its position can be adjusted in the vertical direction. The lower fire-resistant sleeve 1700 is a separate member from the piping 1000 and is not attached to the straight pipe 1100 when shipped from the manufacturing factory.

[0038] The upper heat-expandable fire-resistant material (using the lower fire-resistant sleeve 1700) is fixed to the floor material 100 (frame), the upper heat-expandable fire-resistant material (using the upper fire-resistant sleeve 1600) is fixed to the straight pipe 1100, the lower heat-expandable fire-resistant material (using the lower fire-resistant sleeve 1700) is fixed to the ceiling material 200 (frame), and the lower heat-expandable fire-resistant material (using the upper fire-resistant sleeve 1600) is fixed to the straight pipe 1100. This lower fire-resistant sleeve 1700 is characterized in that it has a sheet-like non-combustible material (fire-resistant cover 1720) on the outer layer of the heat-expandable fire-resistant material (inner fire-resistant tape 1710), and the sheet-like non-combustible material (fire-resistant cover 1720) is fixed to the floor material 100 or the ceiling material 200. A portion of the outer peripheral surface of the sheet-like non-combustible material (fire-resistant cover 1720) (locking portion 1722 if the fire-resistant cover 1720 is a steel plate) is locked onto and fixed to the upper surface of the floor material 100 or ceiling material 200. The sheet-like non-combustible material (fire-resistant cover 1720) is characterized by being rock wool or a steel plate. If the sheet-like non-combustible material (fire-resistant cover 1720) is rock wool, the rock wool is fixed to the floor material 100 or ceiling material 200 (not limited to being locked onto and fixed to the upper surface of the ceiling material 200 by a locking portion).

[0039] The upper heat-expandable fire-resistant material (upper fire-resistant sleeve 1600 or lower fire-resistant sleeve 1700) and / or the lower heat-expandable fire-resistant material (upper fire-resistant sleeve 1600 or lower fire-resistant sleeve 1700) are illustrated as lower fire-resistant sleeve 1701 in FIG. 3(D) and in the fire compartment structure of FIG. 4, and are a single layer structure of heat-expandable fire-resistant material (inner fire-resistant tape 1710), illustrated as lower fire-resistant sleeve 1702 in FIG. 3(C). 2(B) as the upper fire-resistant sleeve 1600, and in FIGS. 3(A) and 3(B) as the lower fire-resistant sleeve 1703, and in the fire compartment structure of FIG. 5, a two-layer structure in which an outer heat-expandable fire-resistant material (outer heat-expandable fire-resistant material ( The upper fire-resistant sleeve 1602 and the lower fire-resistant sleeve 1702 have a three-layer structure including a sheet-like non-combustible material (fire-resistant cover 1620 or fire-resistant cover 1720) and an outer heat-expandable fire-resistant material 1630 or an outer heat-expandable fire-resistant material 1730 on the outer layer of the sheet-like non-combustible material (without the inner heat-expandable fire-resistant material 1610 or the inner heat-expandable fire-resistant material 1710 on the inner layer of the sheet-like non-combustible material) (an inner heat-expandable fire-resistant material is required on the piping side). That is, although not shown, both the upper heat-expandable fire-resistant material (upper fire-resistant sleeve 1600 or lower fire-resistant sleeve 1700) and the lower heat-expandable fire-resistant material (upper fire-resistant sleeve 1600 or lower fire-resistant sleeve 1700) may be of a single-layer structure, a double-layer structure, or a triple-layer structure, and may be provided (fixed) on the piping 1000 (straight pipe 1100) or on the frame (floor material 100 or ceiling material 200). Also, to reiterate, the sheet-like non-combustible material (fire-resistant cover 1720) is characterized by being rock wool or steel plate. The upper fire-resistant sleeve 1600 shown in Figure 2(B) and the lower fire-resistant sleeve 1703 shown in Figure 3(B) have the same three-layer structure, but differ in that the upper fire-resistant sleeve 1600 does not have the locking portion 1722 that is provided on the fire-resistant cover 1720 of the lower fire-resistant sleeve 1703 (for fixing to the piping rather than to the main body).

[0040] Here, the upper fire-resistant sleeve 1600 (more specifically, the upper fire-resistant sleeve 1601) employed as the upper and lower heat-expandable fire-resistant materials shown in Fig. 4 has a single-layer structure of an inner heat-expandable fire-resistant material (inner fire-resistant tape 1610). When the upper fire-resistant sleeve 1600 is provided on the upper side (floor side) as shown in Fig. 4, the lower end of the inner heat-expandable fire-resistant material (inner fire-resistant tape 1610) that is the upper fire-resistant sleeve 1600 is located below the lower surface of the building frame (here, the floor material 100), and the upper end is located flush with or above the upper surface of the building frame (here, the floor material 100). Since the upper fire-resistant sleeve 1600 as the upper heat-expandable fire-resistant material is located in a position that overlaps at least the thickness of the floor material 100 in the vertical direction, the inside of the piping 100 can be blocked. 4, when the upper fire-resistant sleeve 1600 is provided on the lower side (ceiling side), the upper end of the inner heat-expandable fire-resistant material (inner fire-resistant tape 1610) that is the upper fire-resistant sleeve 1600 is located above the upper surface of the building frame (here, the ceiling material 200), and the lower end is located flush with or below the lower surface of the building frame (here, the ceiling material 200).Since the upper fire-resistant sleeve 1600 as the lower heat-expandable fire-resistant material is located at a position that overlaps at least the thickness of the ceiling material 200 in the vertical direction, the inside of the piping 1000 can be blocked.

[0041] 3(C) has a two-layer structure of an inner heat-expandable fire-resistant material (inner fire-resistant tape 1710) and a fire-resistant cover 1720, while the lower fire-resistant sleeve 1703 shown in FIGS. 3(A), 3(B), and 5 has a three-layer structure of an inner heat-expandable fire-resistant material (inner fire-resistant tape 1710), a fire-resistant cover 1720, and an outer heat-expandable fire-resistant material (outer fire-resistant tape 1730). In the case of two or more layers, the lower fire-resistant sleeves 1702 and 1703 are provided with the fire-resistant cover 1720, which is a sheet-like non-combustible material (rock wool or steel plate) that is wider than the thickness of the flooring material 100 and the ceiling material 200, and can reliably seal the inside of the piping 1000 (because they are provided with the fire-resistant cover 1720 even if the flooring material 100 and the ceiling material 200 are thin), and can reliably prevent flames from entering the hollow space of the wooden double floor. In the case of a three-layer structure, the gap between the fire-resistant sleeve and the through-hole is blocked to prevent flames (including flames occurring on the upper floor and the lower floor) from penetrating into the hollow space from between the fire-resistant sleeve and the through-hole, thereby achieving the desired fire compartment structure. This is true whether the fire-resistant sleeve is provided in the piping 1000 (straight pipe 1100) or in the building frame (floor material 100 or ceiling material 200).

[0042] As shown in FIGS. 4 and 5, the fire compartment structure according to this embodiment comprises a floor material 100 and an upper The outer gap between the heat-expandable fire-resistant material (using the upper fire-resistant sleeve 1600 for fixing the piping), the outer gap between the ceiling material 200 and the lower heat-expandable fire-resistant material (using the lower fire-resistant sleeve 1700 for fixing the piping), the inner gap between the piping (straight pipe 1100) and the upper heat-expandable fire-resistant material (using the upper fire-resistant sleeve 1600 for fixing the piping to the building frame), the inner gap between the piping (straight pipe 1100) and the lower heat-expandable fire-resistant material (using the lower fire-resistant sleeve 1700 for fixing the piping to the building frame) (the outer gap and the inner gap The ceiling material 200 is characterized in that a heat-resistant sealant is filled into or applied to the outer peripheral surface of at least one of the following: the outer gap (sometimes simply referred to as the gap when describing without distinguishing between the upper and lower fire-resistant sleeves 1600 and 1700), the outer peripheral surface of the upper heat-expandable fire-resistant material on the upper surface of the flooring material 100 (using the upper fire-resistant sleeve 1600 fixed to the building frame), and the outer peripheral surface of the lower heat-expandable fire-resistant material on the underside of the ceiling material 200 (using the lower fire-resistant sleeve 1700 fixed to the building frame). The outer gap is a gap that occurs when fixing piping, and the inner gap is a gap that occurs when fixing to the building frame. These gaps are filled with a sealant, or a sealant is applied to the outer peripheral surface of the upper fire-resistant sleeve 1600 on the upper surface of the flooring material 100, or a sealant is applied to the outer peripheral surface of the lower fire-resistant sleeve 1700 on the underside of the ceiling material 200 (at least one of six locations). More specifically, the outer gap is filled with silicone sealing SS from the upper side of the flooring material 100 and the lower side of the ceiling material 200 as needed, and the inner gap is filled with internal silicone sealing SSi from the upper side of the flooring material 100 and the lower side of the ceiling material 200 as needed, and external silicone sealing SSo is applied to the outer peripheral surface of the upper fire-resistant sleeve 1600 on the upper surface of the flooring material 100 from the upper side of the flooring material 100, and external silicone sealing SSo is applied to the outer peripheral surface of the lower fire-resistant sleeve 1700 on the lower surface of the ceiling material 200 from the lower side of the ceiling material 200 as needed.

[0043] In addition, the upper outer gap is filled with silicone sealing SS from the upper end of the rock wool RW, whose lower end is filled halfway into the flooring material 100 as a backup material, to the upper surface of the flooring material 100; the lower outer gap is filled with silicone sealing SS from the lower end of the rock wool RW, whose upper end is filled halfway into the ceiling material 200 as a backup material, to the underside of the ceiling material 200; the upper inner gap is filled with internal silicone sealing SSi from the upper end of the internal rock wool RWi, whose lower end is filled halfway into the flooring material 100 as a backup material, to the upper end of the internal fire-resistant tape 1710 of the upper fire-resistant sleeve 1600 (in Figure 5, the lower fire-resistant sleeve 1703 is used); and the lower inner gap is filled with internal silicone sealing SSi from the lower end of the internal rock wool RWi, whose upper end is filled halfway into the ceiling material 200 as a backup material, to the lower end of the internal fire-resistant tape 1710 of the lower fire-resistant sleeve 1700 (in Figure 5, the lower fire-resistant sleeve 1703 is used). An external silicone sealing SSo is applied to the outer peripheral surface of the upper fire-resistant sleeve 1600 (in Figure 5, a lower fire-resistant sleeve 1703 is used) on the upper surface of the flooring material 100 along the outer peripheral surface of the upper fire-resistant sleeve 1600, and an external silicone sealing SSo is applied to the outer peripheral surface of the lower fire-resistant sleeve 1700 (in Figure 5, a lower fire-resistant sleeve 1703 is used) on the lower surface of the ceiling material 200 along the outer peripheral surface of the lower fire-resistant sleeve 1700.

[0044] The fire compartment structure according to this embodiment, which has these characteristics, has heat-expandable fire-resistant materials (fire-resistant sleeves) on both the upper side (at a position that overlaps at least the vertical thickness of the flooring material 100) and the lower side (at a position that overlaps at least the vertical thickness of the ceiling material 200) of the wooden double floor, which makes it possible to prevent flames from penetrating into the hollow space from both the inside and outside of the upper and lower fire-resistant sleeves, thereby extremely minimizing the possibility of damage to the wooden material in the hollow space due to flames and heat. Furthermore, the desired fire compartment structure can be achieved with a minimum amount of heat-expandable fire-resistant material.

[0045] Also, the lower thermally expandable refractory material (lower refractory sleeve 1700) is separate from the straight pipe 1100 (unlike the upper refractory sleeve 1600) and is provided on the ceiling material 200 when installing the pipe 1000 in the through-hole of the hollow double floor. Therefore, it is configured to be positionally adjustable in the vertical direction and can easily accommodate various floor thicknesses. For example, as shown in Fig. 6, even if the floor thickness is L(1) < L(2), the same pipe 1000 and lower thermally expandable refractory material (lower refractory sleeve 1700) can be used to install the lower thermally expandable refractory material (lower refractory sleeve 1700) so that it exists at the position of the ceiling material 200. Note that as an example, L(1) = 364 mm and L(2) = 394 mm. In Fig. 6, as in Fig. 5, an upper thermally expandable refractory material (adopting the lower refractory sleeve 1700) may also be provided on the floor material 100 on the upper side (floor side). This also applies to the case where an upper thermally expandable refractory material (adopting the lower refractory sleeve 1700) is provided on the floor material 100.

[0046] And this lower thermally expandable refractory material (lower refractory sleeve 1700) is fixed to the ceiling material 200. As this fixing method, a sheet-shaped incombustible material (refractory cover 1720) is provided on the outer layer of the thermally expandable refractory material (inner refractory tape 1710), and the sheet-shaped incombustible material (refractory cover 1720) is fixed to the ceiling material 200. In this case, a part of the outer peripheral surface of the sheet-shaped incombustible material (refractory cover 1720) (locking portion 1722 when the refractory cover 1720 is a steel plate) is locked and fixed to the upper surface of the ceiling material 200. Therefore, before installing the ceiling material 200, simply standing up the locking portion 1722 (claw, return) and locking it to the upper surface of the ceiling material 200 can prevent it from falling and shifting from the through-hole, and it can be fixed easily. This also applies to the case where an upper thermally expandable refractory material (adopting the lower refractory sleeve 1700) is provided on the floor material 100.

[0047] In addition, there are an outer gap between the floor material 100 and the upper heat-expandable fire-resistant material (using an upper fire-resistant sleeve 1600 fixed to the piping), an outer gap between the ceiling material 200 and the lower heat-expandable fire-resistant material (using a lower fire-resistant sleeve 1700 fixed to the piping), an inner gap between the piping (straight pipe 1100) and the upper heat-expandable fire-resistant material (using an upper fire-resistant sleeve 1600 fixed to the building frame), and an inner gap between the piping (straight pipe 1100) and the lower heat-expandable fire-resistant material (using a lower fire-resistant sleeve 1700 fixed to the building frame). A heat-resistant sealant is filled into the gaps or applied to the outer peripheral surface at least in one location: the gaps, the outer peripheral surface of the upper heat-expandable fire-resistant material (upper fire-resistant sleeve 1600 fixed to the main body) on the upper surface of the flooring material 100, and the outer peripheral surface of the lower heat-expandable fire-resistant material (lower fire-resistant sleeve 1700 fixed to the main body) on the lower surface of the ceiling material 200, and these gaps are provided with rock wool as a backup material. Therefore, the thermally expandable fire-resistant material (fire-resistant tape) can expand according to the desired specifications, and the inner fire-resistant tape 1610 or the inner fire-resistant tape 1710 closes the inside of the piping 1000 to prevent the intrusion of flames (including flames that have started on the floor above) from the inside of the pipe into the hollow space, and when the outer fire-resistant tape 1630 or the outer fire-resistant tape 1730 is provided, it closes the gap between the fire-resistant sleeve and the through-hole to prevent the intrusion of flames (including flames that have started on the floor above) from the gap between the fire-resistant sleeve and the through-hole into the hollow space, thereby achieving the desired fire compartment structure. This is true whether the fire-resistant sleeve is provided on the piping 1000 (straight pipe 1100) or on the building frame (floor material 100 or ceiling material 200).

[0048] <Fire compartment construction method> The following describes a construction method for the fire compartment structure of a wooden double floor according to the present embodiment (shown in Fig. 6). In Fig. 6, an upper fire-resistant sleeve 1600 (more specifically, upper fire-resistant sleeve 1603) (fixed to a three-layer type pipe) is used as the upper thermally expandable fire-resistant material, and a lower fire-resistant sleeve 1700 (more specifically, lower fire-resistant sleeve 1703) (fixed to a three-layer type building frame) is used as the lower thermally expandable fire-resistant material.

[0049] (Step 1) With the wooden double flooring material 100 shown in Figure 1 installed but the ceiling material 200 not installed, prepare the piping 1000 to which the upper fire-resistant sleeve 1600 (here, the upper fire-resistant sleeve 1603 of a three-layer structure) shown in Figure 2 is integrally attached, the lower fire-resistant sleeve 1700 (here, the lower fire-resistant sleeve 1703 of a three-layer structure) which is a lower heat-expandable fire-resistant material that is a separate part from the piping 1000 (shipped from the manufacturing factory in separate packaging), the drainage standpipe 1530 with inlet, a construction jig for temporarily fastening the lower fire-resistant sleeve 1703, rock wool as a backup material, and silicone for filling the gaps.

[0050] (Step 2) Attach the lower fireproof sleeve 1703 to the straight pipe 1100. Specifically, the lower fireproof sleeve 1703 is passed below the upper fireproof sleeve 1600 of the straight pipe 1100 and fixed in place with an installation jig. This installation jig is used to position the backup material (internal rock wool RWi) inside the lower fireproof sleeve 1703 and to prevent the lower fireproof sleeve 1703 from falling. Furthermore, by using the installation jig in this manner, the backup material (internal rock wool RWi) can be positioned at a certain distance (position) from the bottom end of the lower fireproof sleeve 1703, which serves as a suitable guide for filling the sealant (internal silicone sealing SSi).

[0051] (Step 3) The pipe 1000 to which the lower fireproof sleeve 1703 is temporarily fixed is inserted through the through-hole (opening) of the flooring 100. The spigot of the pipe 1000 is inserted into the spigot of the drainage stand pipe 1530 with spigot on the lower floor.

[0052] (Step 4) Three sides of a rectangular portion of the fire-resistant cover 1720 (assumed to be a steel plate in this case) of the lower fire-resistant sleeve 1703 are cut out and folded back outward to form engaging portions 1722 (nails, burrs). The ceiling is constructed using the ceiling material 200. When the construction of the ceiling is complete, the engaging portions 1722 are engaged with the upper surface of the ceiling material 200.

[0053] (Step 5) The installation jig is removed. At this time, since the locking portion 1722 is locked to the upper surface of the ceiling material 200, the lower fire-resistant sleeve 1703 will not fall even when the installation jig is removed.

[0054] (Step 6) The internal rock wool RWi, which is the backup material, is inserted between the pipe 1000 and the lower fireproof sleeve 1703. When installing the internal rock wool RWi, which is the backup material, a construction jig is used to control the thickness of the silicone (internal silicone sealing SSi) in the vertical direction.

[0055] (Step 7) The outer gap between the floor material 100 and the upper heat-expandable fire-resistant material (using the upper fire-resistant sleeve 1600 fixed to the piping), the outer gap between the ceiling material 200 and the lower heat-expandable fire-resistant material (using the lower fire-resistant sleeve 1700 fixed to the piping), the inner gap between the piping (straight pipe 1100) and the upper heat-expandable fire-resistant material (using the upper fire-resistant sleeve 1600 fixed to the building frame), the inner gap between the piping (straight pipe 1100) and the lower heat-expandable fire-resistant material (using the lower fire-resistant sleeve 1700 fixed to the building frame), A heat-resistant sealant is filled into the gaps or applied to the outer periphery at least in one location: the inner gap between the upper heat-expandable fire-resistant material on the top surface of the flooring material 100 (upper fire-resistant sleeve 1600 fixed to the building frame is used), the outer periphery of the upper heat-expandable fire-resistant material on the top surface of the flooring material 100 (upper fire-resistant sleeve 1600 fixed to the building frame is used), and the outer periphery of the lower heat-expandable fire-resistant material on the bottom surface of the ceiling material 200 (lower fire-resistant sleeve 1700 fixed to the building frame is used) (silicon sealing is applied to at least one of the six locations). In this case, the heat-resistant sealant is filled into the gaps or applied to the outer periphery of the upper outer gap and inner gap and the outer periphery of the upper heat-expandable fire-resistant material on the top surface of the flooring material 100 from the top side of the flooring material 100, and the heat-resistant sealant is filled into the gaps or applied to the outer periphery of the lower outer gap and inner gap and the outer periphery of the lower heat-expandable fire-resistant material on the bottom surface of the ceiling material 200 from the bottom side of the ceiling material 200.

[0056] As described above, the fire compartment structure and fire sleeve of this embodiment can provide a fire compartment structure that complies with legal regulations regarding the fire resistance of compartments that include resin piping that is installed through a wooden hollow floor that has flooring material that forms the floor of the upper floor and ceiling material that forms the ceiling of the lower floor, with a hollow space between the flooring material and the ceiling material, and a fire sleeve that is a separate member from the piping that realizes such a fire compartment structure.

[0057] First and second modified examples applicable to the fire compartment structure according to the above-described embodiment will be described below with reference to the drawings. In the drawings, reference numerals may be omitted for the same components as those in the above-mentioned drawings. <First Modification: Steady-Resistance Jig>

[0058] With reference to Figure 7, a vibration-preventing jig 2000 for supporting a drainage standpipe with inlet 1530 according to a first modified example will be described. A construction characteristic of a wooden hollow floor in the above-mentioned <Construction method for a fire compartment structure> is that in a concrete floor other than a wooden hollow floor (where the floor and ceiling are one unit), support fittings can be fixed to the concrete floor with anchors or the like to secure the piping during construction, but in a wooden hollow floor, the ceiling material 200 is reinforced gypsum board, so it is not possible to fix support fittings to the reinforced gypsum board that is the ceiling material 200 as in a concrete floor (where the floor and ceiling are one unit). Because wooden hollow floors have special circumstances that differ from those of general concrete floors (where the floor and ceiling are one unit), the vibration-preventing jig described below was adopted. Here, the connection method between the straight pipe 1100 and the inlet-equipped drainage standpipe 1530 is a plug-in type rubber ring joint, and in order to support the inlet-equipped drainage standpipe 1530 due to the fact that the connected straight pipe 1100 and the inlet-equipped drainage standpipe 1530 cannot be fixed to a typical concrete floor (where the floor and ceiling are integrated), the straight pipe 1100 and the inlet-equipped drainage standpipe 1530 are fixed with an anti-vibration jig 2000 as shown in Figure 7(C).

[0059] This anti-vibration jig 2000 is composed of a metal member made, for example, from a thin metal plate, and a rubber member (that grips the pipe (here, a straight pipe 1100 and a drainage standpipe 1530 with a receiving port)). As shown in the top view shown in Figure 7(A) and the side view shown in Figure 7(B), the anti-vibration jig 2000 is a member formed by combining a pair of upper and lower bands (the upper and lower bands have the same configuration and therefore the same reference numeral 2010 is used) that are made up of a substantially annular band 2010 (with a hinge portion 2010H) that grips the pipe and an annular rubber member 2010R that is attached so as to cover the band 2010 and functions as a buffer between the band 2010 and the pipe, and connecting these upper and lower bands with a connecting plate 2020.

[0060] Fastening members 2014 (combinations of bolts and nuts; the fastening members will not be described again below) are inserted into band holes (not shown) formed in connecting portions 2012 extending from band 2010, and by tightening the fastening members, diameter R(1) is reduced, and band 2010 is wound around the piping via rubber member 2010R. This applies to both the upper and lower bands.

[0061] The upper band and the lower band are connected by a connecting plate 2020, with fastening members 2016 inserted into connecting holes (not shown) provided in connecting portions 2012 extending from the band 2010, and the movement in the direction of the arrow R(2) is restricted by tightening the fastening members, and the band 2010 is wrapped around the piping via a rubber member 2010R.

[0062] By using the anti-vibration jig 2000 having the above-described configuration, when constructing a wooden hollow floor, when the ceiling material 200 is constructed after connecting the straight pipe 1100 and the drainage standpipe with inlet 1530, which has been connected first by a plug-in rubber ring joint, it is possible to prevent construction problems caused by the drainage standpipe with inlet 1530 shaking. <Second variation: Method of installing reinforced gypsum board on the ceiling side>

[0063] With reference to Fig. 8, a method of attaching a reinforced gypsum board on the ceiling side according to the second modified example will be described. As explained with reference to Fig. 1 in the above embodiment, the ceiling material 200 is constructed by overlapping a reinforced gypsum board 210 (thickness t = 25 mm) and a reinforced gypsum board 220 (thickness t = 21 mm), and a through hole 302 (diameter Φ 160 mm, as an example) is provided in this ceiling material 200. The reinforced gypsum board 210 on the upper (upper floor) side and the reinforced gypsum board 220 on the lower (lower floor) side that constitute the ceiling material 200 with this through hole 302 20) is shown in Figure 8(A).

[0064] As shown in Figure 8(B), the reinforced gypsum boards 210 and 220 are each divided into two by a division line L so that the through holes 302 opened in the reinforced gypsum boards 210 and 220 are halved. Next, as shown in Figure 8(C), the first reinforced gypsum board 210 on the upper (upper floor) side that constitutes the ceiling material 200 is installed. Next, as shown in Figure 8(D), the second reinforced gypsum board 220 on the lower (lower floor) side that constitutes the ceiling material 200 is installed so that the division lines L (crack surfaces) are perpendicular to each other.

[0065] When the ceiling material 200 is constructed in this manner, the dividing line L (crack surface) of the first reinforced gypsum board 210 on the upper (upper floor) side and the dividing line L (crack surface) of the second reinforced gypsum board 220 on the lower (lower floor) side are constructed so as to be perpendicular to each other, thereby improving the strength of the ceiling material 200. Note that, as long as the effect of improving the strength of the ceiling material 200 is exhibited, the dividing lines L (crack surfaces) of the two reinforced gypsum boards are not limited to being perpendicular, but may be approximately perpendicular, not parallel, not coincident, etc.

[0066] It should be noted that the embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. For example, the fire compartment structure shown in Figures 4 to 6 in the above-mentioned embodiment has been confirmed to have fire resistance that satisfies the following three conditions when heated for one hour under the same conditions (standard heating curve: ISO0834) as the certification test for the one-hour compartment penetration method and then left for three hours: (1) the temperature of the wood in the hollow space is 260°C or less (temperature at which wood ignites: 260°C), (2) the wood in the hollow space does not carbonize, and (3) the inside of the resin piping is completely blocked. In addition, a fire resistance test was conducted by burning from the ceiling side, but the fire compartment structure shown in Figures 4 to 6 has a structure that prevents fire from spreading into the hollow space even when it is from the floor side. To achieve this, an upper fire-resistant sleeve 1600 is installed. [Industrial Applicability]

[0067] The present invention is preferred for a fire compartment structure for resin piping that passes through a wooden hollow floor that has a hollow space between an upper floor as a floor material and a lower floor as a ceiling material, and is particularly preferred in that it can realize a fire compartment structure that complies with legal regulations. [Explanation of symbols]

[0068] 100 Flooring 200 Ceiling materials 1000 Resin piping 1100 straight pipe 1530 Drainage standpipe with inlet 1600 Upper fireproof sleeve (Upper fireproof sleeve 1600, 1601~1603) 1700 Lower fireproof sleeve (Lower fireproof sleeve 1700, 1701~1703)

Claims

1. A fire compartment structure of a wooden hollow floor comprising a floor material constituting the floor of an upper floor and a ceiling material constituting the ceiling of a lower floor provided with a hollow space between the floor material and the floor material, wherein a resin pipe is installed to penetrate the wooden hollow floor, An upper thermally expandable fire-resistant material is present at a position that overlaps at least the thickness of the floor material in the vertical direction, A fire compartment structure characterized in that a lower heat-expandable fire-resistant material separate from the upper heat-expandable fire-resistant material is present in a position that overlaps at least the vertical thickness of the ceiling material.

2. the upper heat-expandable fire-resistant material and / or the lower heat-expandable fire-resistant material are configured to be vertically position adjustable, 2. The fire compartment structure according to claim 1, wherein the upper heat-expandable fire-resistant material is located at the position of the floor material, and the lower heat-expandable fire-resistant material is located at the position of the ceiling material.

3. the upper thermally expandable fire-resistant material is fixed to the floor material or the piping; The fire compartment structure according to claim 1, wherein the lower thermally expandable fire-resistant material is fixed to the ceiling material or the piping.

4. When the upper heat-expandable fire-resistant material is fixed to the floor material and / or when the lower heat-expandable fire-resistant material is fixed to the ceiling material, The upper thermally expandable fire-resistant material and / or the lower thermally expandable fire-resistant material are The outer layer of the heat-expandable fire-resistant material is provided with a sheet-shaped non-combustible material, 4. The fire compartment structure according to claim 3, wherein the sheet-like non-combustible material is fixed to the floor material and / or the ceiling material.

5. 5. The fire compartment structure according to claim 4, wherein a portion of the outer peripheral surface of the sheet-like non-combustible material is engaged and fixed to the upper surface of the floor material and / or the ceiling material.

6. 5. The fire compartment structure according to claim 4, wherein the sheet-like non-combustible material is rock wool or a steel plate.

7. The upper thermally expandable fire-resistant material and / or the lower thermally expandable fire-resistant material are A single layer of inner heat-expandable fire-resistant material, A two-layer structure including a sheet-shaped non-combustible material and an inner heat-expandable fire-resistant material in the inner layer of the sheet-shaped non-combustible material or an outer heat-expandable fire-resistant material in the outer layer of the sheet-shaped non-combustible material, or 2. The fire compartment structure according to claim 1, characterized in that it is a three-layer structure comprising a sheet-shaped non-combustible material, an inner heat-expandable fire-resistant material as an inner layer of the sheet-shaped non-combustible material, and an outer heat-expandable fire-resistant material as an outer layer of the sheet-shaped non-combustible material.

8. 8. The fire compartment structure according to claim 7, wherein the sheet-like non-combustible material is rock wool or a steel plate.

9. 2. The fire compartment structure of claim 1, wherein a heat-resistant sealant is filled into or applied to at least one of the gaps between the floor material and the upper heat-expandable fire-resistant material, the gap between the ceiling material and the lower heat-expandable fire-resistant material, the gap between the piping and the upper heat-expandable fire-resistant material, the gap between the piping and the lower heat-expandable fire-resistant material, the outer peripheral surface of the upper heat-expandable fire-resistant material on the upper surface of the floor material, and the outer peripheral surface of the lower heat-expandable fire-resistant material on the lower surface of the ceiling material.

10. A fireproof sleeve that is a separate member from the piping for realizing the fire-resistant compartment structure, characterized in that it is provided with the upper heat-expandable fire-resistant material or the lower heat-expandable fire-resistant material described in any one of claims 1 to 9.

Images