Fire compartment structure for resin drainage collecting 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 drainage collecting pipe is constructed.SOLUTION: A fire compartment structure for a wooden hollow floor comprises a floor material 100 forming a floor of an upper story and a ceiling material 200 forming a ceiling of a lower story provided with a hollow space from the floor material 100, wherein a resin drainage collecting pipe 1000 is installed so as to penetrate the wooden hollow floor, an upper thermally expandable fire-resistant material (upper fireproof sleeve 1600) is present at a position overlapping at least the vertical thickness of the floor material 100, and a lower thermally expandable fire-resistant material (lower fireproof sleeve 1700) different from the upper thermally expandable fire-resistant material (upper fireproof sleeve 1600) 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 using a resin drainage collecting pipe (sometimes referred to as a resin drainage collecting pipe or simply a drainage collecting pipe) that penetrates a wooden hollow floor with 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 performance and comply with legal regulations regarding fire resistance performance using a resin drainage collecting pipe, and to a fire sleeve that is a separate member from the resin drainage collecting pipe to achieve such a fire compartment structure. Note that in the following description, the terms "fireproof" in fire sleeve and "fire-resistant" in fire-resistant sleeve 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), thereby sealing off 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 off the through-holes in the partition and the pipes, preventing flames and heat from penetrating the through-holes or the pipes and spreading the fire to other rooms. [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 a heavy cast iron (metal) collector pipe is supported on a thin floor, the thin floor may be damaged in the event of a fire, making it unable to support the drainage collector pipe, which could cause the pipe to fall. Therefore, there is a demand to install lightweight plastic drainage collector pipes in wooden hollow floors, thereby realizing 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 including a resin drainage collecting pipe installed through a wooden hollow floor that includes flooring materials that form the floor of an upper floor and ceiling materials that form the ceiling of a lower floor, separated by a hollow space from the flooring materials, and a fire sleeve that is a separate member from the drainage collecting pipe for realizing such a fire compartment structure.Furthermore, in consideration of the special circumstances that exist 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 including a resin drainage collecting pipe 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, which is provided with a hollow space separated from the floor material, and is characterized in that a resin drainage collecting pipe is installed to pass through the wooden hollow floor, an upper heat-expandable fire-resistant material is present in a position overlapping at least the vertical thickness of the floor material, and a lower heat-expandable fire-resistant material separate from the upper heat-expandable fire-resistant material is present in a position overlapping at least the vertical thickness of the ceiling material. Preferably, the lower thermally expandable fire-resistant material is configured so that its position can be adjusted in the vertical direction, and can be configured to be located at the position of the ceiling material. More preferably, the lower thermally expandable fire-resistant material can be configured to be fixed to the ceiling material.

[0017] More preferably, the lower heat-expandable fire-resistant material has 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 configured to be fixed to the ceiling material. More preferably, a portion 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 ceiling material. More preferably, the sheet-like non-combustible material can be rock wool or a steel plate.

[0018] More preferably, when the upper heat-expandable fire-resistant material is provided in the pipe wall or outer cover of the drainage collecting pipe, the upper heat-expandable fire-resistant material is any one of a single-layer structure of a sheet-shaped non-combustible material, a two-layer structure of a sheet-shaped non-combustible material and an outer heat-expandable fire-resistant material on the outer layer of the sheet-shaped non-combustible material, or a three-layer structure of a sheet-shaped non-combustible material and an inner heat-expandable fire-resistant material on the inner layer of the sheet-shaped non-combustible material and an outer heat-expandable fire-resistant material on the outer layer of the sheet-shaped non-combustible material. The lower heat-expandable fire-resistant material can be configured to have any one of 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, a heat-resistant sealant can be filled into the gap between the floor material and the upper heat-expandable fire-resistant material, the gap between the drainage manifold and the lower heat-expandable fire-resistant material, and at least one location on the outer peripheral surface of the lower heat-expandable fire-resistant material on the underside of the ceiling material, 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 drainage manifold 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 including a resin drainage collecting pipe installed through a wooden hollow floor that includes a floor material that constitutes the floor of an upper floor and a ceiling material that constitutes 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 drainage collecting 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 that arise in construction for realizing a fire compartment structure that complies with legal regulations regarding the fire resistance of a compartment including a resin drainage collecting 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 a drainage collecting pipe is inserted in a fire compartment structure according to an embodiment of the present invention. FIG. [Figure 2] FIG. 1A is a side view of a drainage manifold 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 two-layer structure type fire sleeve in which the upper side is a thermally expandable fire-resistant material. [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] FIG. 10 is a side view (partial cross-sectional view) for explaining a fire compartment structure according to an embodiment of the present invention, which is realized by adopting a single-layer structure type fire sleeve shown in FIG. 3(D) as the lower thermally expandable fire-resistant material. [Figure 5]FIG. 10 is a side view (partial cross-sectional view) illustrating a fire compartment structure according to an embodiment of the present invention, which is realized by adopting a three-layer structure type fire sleeve shown in FIG. 3(B) as the lower thermally expandable fire-resistant material. [Figure 6] FIG. 6 is a side view for explaining the fire compartment structure according to the present embodiment, which can accommodate a wide range of floor thicknesses L in FIG. 5. [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 that the outer fire-resistant tape of the upper fire-resistant sleeve can be adjusted in the vertical direction according to the second modified example. [Figure 9] FIG. 10 is a diagram for explaining details of a drainage collecting pipe support member provided on a floor material according to a third modified example. [Figure 10] FIG. 10 is a diagram illustrating a method for attaching a reinforced gypsum board on the ceiling side according to a fourth modified example. DETAILED DESCRIPTION OF THE INVENTION

[0023] A fire compartment structure according to an embodiment of the present invention, in which a resin drainage collecting pipe 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 dashed lines and arrows indicate the figure number, and the letters indicate the sub-number (A, B, C, etc.) in that figure, and an enlarged view is shown in the figure identified by the reference numeral (only Fig. 5). The upper and / or lower heat-expandable fire-resistant materials that realize the fire compartment structure according to this embodiment may be one of the following: a single-layer structure consisting of only a sheet-like non-combustible material (sometimes referred to as a fire-resistant cover) or only an inner heat-expandable fire-resistant material (sometimes referred to as an inner fire-resistant tape); a two-layer structure consisting of an inner heat-expandable fire-resistant material on the inner layer of a sheet-like non-combustible material or an outer heat-expandable fire-resistant material (sometimes referred to as an outer fire-resistant tape) on the outer layer of a sheet-like non-combustible material; or a three-layer structure consisting of an inner heat-expandable fire-resistant material on the inner layer of a sheet-like non-combustible material and an outer heat-expandable fire-resistant material on the outer layer. All of these types may be referred to as a fire sleeve or fire-resistant sleeve. The height dimension parallel to the axis of the drainage manifold 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 and the floor and ceiling materials of the wooden hollow floor relative to the resin drainage collecting pipe installed in the wooden hollow floor, as well as the method for fastening the thermally expandable fire-resistant material. Furthermore, a three-layer outer layer member may be attached to the outer surface of the resin drainage collecting pipe. As shown in FIG. 2 (described later), this outer layer member 1800 (sometimes referred to as an outer layer cover) can be typically configured, from the outer surface of the resin drainage collecting pipe 1000, in this order: vibration-damping and sound-insulating material 1810; vibration insulator 1820 made of fire-resistant inorganic fiber (e.g., rock wool sheet); and sound-insulating cover 1830 (e.g., made of rubber). Furthermore, a thermally expandable fire-resistant material 1612 is provided in place of the innermost vibration-damping and sound-insulating material 1810. This is the case where the heat-expandable fire-resistant material 1612 is provided integrally with the drainage collecting pipe 1000 (rather than being separate from the drainage collecting pipe) in the pipe wall or outer layer cover 1800 of the drainage collecting pipe 1000. A rubber ring 1850 and a heat-shrinkable tube 1860 are provided in association with this outer layer member 1800. Furthermore, a heat-resistant sealant is filled or applied (silicone sealing) between the drainage collecting pipe 1000 (more specifically, the upper pipe 1100) and the fire-resistant sleeve 1600, which will be described in detail later.

[0025] As will be described later, the fire compartment structure of the present invention is realized by fixing an upper heat-expandable fire-resistant material (one- to three-layer upper fire-resistant sleeve) to a drainage manifold 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-resistant sleeve) to the ceiling material 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, the hollow part may be filled with CLT (Cross Laminated Timber: a large wooden panel building material made by bonding together sawn boards (lamina) so that the fiber direction of each layer intersects at right angles), or CLT may be used for the 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 a resin drainage collecting pipe 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 Φ208mm, 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, while this is also just 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 partition body with a hollow structure installed horizontally within a multi-story building, and a resinous drainage collecting pipe is installed in the through-hole of this wooden hollow floor together with the upper heat-expandable fire-resistant material on the floor 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 partition body, the wooden hollow floor, comprises floor material 100, which 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, which constitutes the ceiling of the lower floor and is installed with a hollow space between it and floor material 100 and is composed of a non-combustible material. <Thermal expansion fire-resistant material (fireproof sleeve, fire-resistant sleeve)>

[0028] Referring to Figure 2, a resin drainage collecting pipe 1000 suitable for installation in the wooden hollow floor shown in Figure 1 will be described. This drainage collecting pipe 1000 includes an upper pipe 1100 protruding above the flooring material 100 and a lower pipe 1500 connected below the upper pipe 1100. A receptacle 1114 (with a rubber ring) is attached to the upper riser pipe connector for connecting an upper riser pipe through which wastewater flows in from the upper floor. A receptacle 1124 (with a rubber ring) is attached to up to three (one here) horizontal branch pipe connectors for connecting horizontal branch pipes above the flooring material 100 (rubber rings not shown). The lower pipe 1500 includes a lower pipe connector for connecting a lower pipe 1510 through which wastewater flows out to the floor below. The drainage collecting pipe 1000 may have a socket 1520 to extend the lower pipe 1510 to accommodate the floor thickness L. The socket 1520 may not be shown in the drawings because it is an optional component in the present invention.

[0029] The upper heat-expandable fire-resistant material is provided (by being attached) to the outer layer member 1800 of the drainage collecting pipe 1000 as an upper fire-resistant sleeve 1600 shown in Fig. 2(B) at a position including the heat-expandable fire-resistant material 1612, just below the branch (not at the reduced diameter portion) of the lower pipe 1500, so as to be present in a position that overlaps at least the thickness of the flooring material 100 in the vertical direction. As shown in Fig. 2(B), this upper fire-resistant sleeve 1600 is an upper fire-resistant sleeve 1602 having a two-layer structure including a sheet-like non-combustible material (fire-resistant cover 1620) and an outer fire-resistant tape 1630 (in tape or sheet form) on the outer layer of the sheet-like non-combustible material (the heat-expandable fire-resistant material 1612 functions as the inner fire-resistant material). The upper fire-resistant sleeve 1600 may be an upper fire-resistant sleeve 1603 (not shown) having a three-layer structure including an inner fire-resistant tape 1610 (not shown) (in tape or sheet form), a sheet-like non-combustible material (fire-resistant cover 1620) as an outer layer of the inner fire-resistant tape 1610, and an outer fire-resistant tape 1630 (in tape or sheet form) as an outer layer of the sheet-like non-combustible material. Furthermore, the upper fire-resistant sleeve 1600 may be an upper fire-resistant sleeve 1601 (not shown) having a single-layer structure including only a sheet-like non-combustible material (fire-resistant cover 1620). As described above, the upper fire-resistant sleeve 1600 (the upper fire-resistant sleeve 1601 has a single-layer structure, the upper fire-resistant sleeve 1602 has a double-layer structure, and the upper fire-resistant sleeve 1603 has a triple-layer structure, but may be referred to as the upper fire-resistant sleeve 1600 when explaining common features) serving as the upper heat-expandable fire-resistant material is not limited to the double-layer structure shown in Fig. 2(B) above, and may have a triple-layer structure or a single-layer structure, just like the lower fire-resistant sleeve 1700 serving as the lower heat-expandable fire-resistant material described below. As described above, a heat-resistant sealant is filled or applied (silicone sealing) between the drainage collecting pipe 1000 (more specifically, the upper pipe 1100) and this fire-resistant sleeve 1600.

[0030] Next, the lower thermally expandable fire-resistant material will be described with reference to Fig. 3. This lower thermally expandable fire-resistant material is provided in the ceiling material 200 (not in the drainage collecting pipe 1000) as a lower fire-resistant sleeve 1700 (more specifically, a lower fire-resistant sleeve 1703 with a three-layer structure, a lower fire-resistant sleeve 1702 with a two-layer structure, and a lower fire-resistant sleeve 1701 with a single layer structure, but may be referred to as the lower fire-resistant sleeve 1700 when explaining common points) which is a separate member from the drainage collecting pipe for realizing the fire-resistant compartment structure according to the present invention, so as to be in a position overlapping at least the thickness of the ceiling material 200 in the vertical direction.

[0031] 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 (bottom end together with the inner fire-resistant tape 1710), and that of the outer fire-resistant tape 1730 is 25 mm, and the lower fire-resistant sleeve 1703 has engaging portions 1722 (claws, burrs) formed by cutting three sides of a rectangular portion of the fire-resistant cover 1720 (here assumed to be a steel plate) and folding them outward. The engaging portions 1722 are engaged with the upper surface of the ceiling material 200 to attach the lower fire-resistant 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 drainage collecting pipe 1000 (here, the lower piping 1510), 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, if the two-layer structure does not have an inner fire-resistant tape 1710 but has an outer fire-resistant tape 1730, an inner heat-expandable fire-resistant material is required, for example, that is provided integrally with the drainage collecting pipe or that is provided separately from the drainage collecting pipe.

[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] 4 to 6, a fire compartment structure according to this embodiment, which uses a drainage collecting pipe 1000 equipped with such an upper fire-resistant sleeve 1600 and a lower fire-resistant sleeve 1700 that is a separate member from the drainage collecting pipe 1000, will be described in detail. The upper fire-resistant sleeve 1600 as the upper heat-expandable fire-resistant material is a two-layer upper fire-resistant sleeve 1602 in FIGS. 4 to 6, and the lower fire-resistant sleeve 1700 as the lower heat-expandable fire-resistant material is a single-layer lower fire-resistant sleeve 1701 in FIG. 4 and a three-layer lower fire-resistant sleeve 1703 in FIGS. 5 to 6. As described above, the upper fire-resistant sleeve 1600 as the upper heat-expandable fire-resistant material and / or the lower fire-resistant sleeve 1700 as the lower heat-expandable fire-resistant material are not limited to any one type (however, as will be described later, the lower fire-resistant sleeve 1700 exists separately from the upper fire-resistant sleeve 1600, the upper fire-resistant sleeve 1600 is manufactured and shipped integrally with the drainage collecting pipe 1000, and the lower fire-resistant sleeve 1700 is a separate member from the drainage collecting pipe 1000, and the upper fire-resistant sleeve 1600 is attached to the drainage collecting pipe 1000, and the lower fire-resistant sleeve 1700 is fixed to the ceiling material 200, which is the building frame). For this reason, in addition to the heat-expandable fire-resistant material 1612 provided integrally with the drainage collecting pipe 1000, a fire-resistant sleeve separate from the drainage collecting pipe 1000 may include a heat-expandable fire-resistant material. In addition, in Figures 4 to 6, the lower piping 1510 of the drainage collecting pipe 1000 is connected to a drainage vertical pipe 1530 with an inlet, and the drainage collecting pipe 1000 has an inlet member 1114 (with a rubber ring) fixed to the floor material 100 using a support member 1010. 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 a resin drainage collecting pipe 1000 is installed to penetrate the wooden hollow floor. An upper heat-expandable fire-resistant material (upper fire-resistant sleeve 1600) is located at a position overlapping at least the vertical thickness of the floor material 100, and a lower heat-expandable fire-resistant material (lower fire-resistant sleeve 1700) separate from the upper heat-expandable fire-resistant material (upper fire-resistant sleeve 1600) is located at a position overlapping at least the vertical thickness of the ceiling material 200.

[0037] The lower heat-expandable fire-resistant material (lower fire-resistant sleeve 1700) is configured so that its position can be adjusted in the vertical direction, and is located at the position of the ceiling material 200. This feature is in contrast to the upper heat-expandable fire-resistant material (upper fire-resistant sleeve 1600), which is attached to a predetermined position in the vertical direction of the drainage collecting pipe 1000 (directly below the branch (not the reduced diameter portion) of the lower pipe 1500) at the time of shipping from the manufacturing factory, as shown in Figure 2 (A), and is not configured so that its position can be adjusted in the vertical direction. The lower heat-expandable fire-resistant material (lower fire-resistant sleeve 1700) is a separate member from the drainage collecting pipe 1000, and is not attached to the drainage collecting pipe 1000 when shipped from the manufacturing factory.

[0038] The lower heat-expandable fire-resistant material (lower fire-resistant sleeve 1700) is fixed to the ceiling material 200. This lower heat-expandable fire-resistant material (lower fire-resistant sleeve 1700) is provided with 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 ceiling material 200. A part of the outer surface of the sheet-like non-combustible material (fire-resistant cover 1720) (an engaging part 1722 when the fire-resistant cover 1720 is a steel plate) is engaged with and fixed to the upper surface of the ceiling material 200. The sheet-like non-combustible material (fire-resistant cover 1720) is 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 ceiling material 200 (not limited to being fixed by being engaged with the upper surface of the ceiling material 200 by an engaging portion).

[0039] The upper heat-expandable fire-resistant material (upper fire-resistant sleeve 1600) is provided in the case where the heat-expandable fire-resistant material 1612 is provided in the pipe wall of the drainage collecting pipe 1000 or in the outer cover 1800 (however, this is not limited to the case where the heat-expandable fire-resistant material 1612 is provided on the drainage collecting pipe 1000 side), Upper fire-resistant sleeve 1601 (not shown) made of a single layer of sheet-like non-combustible material (fire-resistant cover 1620), 2(B) and 4 to 6, a two-layer structure upper fire-resistant sleeve 1602 having a sheet-like non-combustible material (fire-resistant cover 1620) and an outer heat-expandable fire-resistant material 1630 on the outer layer of the sheet-like non-combustible material (fire-resistant cover 1620), or - Either a sheet-like non-combustible material (fire-resistant cover 1620) or an upper fire-resistant sleeve 1603 (not shown) having a three-layer structure comprising an inner heat-expandable fire-resistant material 1610 on the inner layer of the sheet-like non-combustible material (fire-resistant cover 1620) and an outer heat-expandable fire-resistant material 1630 on the outer layer of the sheet-like non-combustible material (fire-resistant cover 1620). The lower thermally expandable fire-resistant material (lower fire-resistant sleeve 1700) A lower fire-resistant sleeve 1701 with a single layer of inner heat-expandable fire-resistant material (inner fire-resistant tape 1710) as shown in FIG. 3(D), 3(C), a lower fire-resistant sleeve 1702 having a two-layer structure including a sheet-like non-combustible material (fire-resistant cover 1720) and an inner thermally expandable fire-resistant material 1710 on the inner layer of the sheet-like non-combustible material (fire-resistant cover 1720); 3(A), 3(B) and 4 to 6, the fire compartment structure (lower side, ceiling material side) is either a sheet-shaped non-combustible material (fire-resistant cover 1720) and a lower fire-resistant sleeve 1703 having a three-layer structure including an inner heat-expandable fire-resistant material 1710 on the inner layer of the sheet-shaped non-combustible material (fire-resistant cover 1720) and an outer heat-expandable fire-resistant material 1730 on the outer layer of the sheet-shaped non-combustible material (fire-resistant cover 1720). Although not shown, the lower fire-resistant sleeve 1702 may have a two-layer structure including a sheet-shaped non-combustible material (fire-resistant cover 1720) and an outer heat-expandable fire-resistant material 1730 on the outer layer of the sheet-shaped non-combustible material (fire-resistant cover 1720) (an inner heat-expandable fire-resistant material is required on the drainage collecting pipe side). That is, although not shown, both the upper heat-expandable fire-resistant material (upper fire-resistant sleeve 1600) and the lower heat-expandable fire-resistant material (lower fire-resistant sleeve 1700) may be of a single-layer structure (with different upper and lower configurations), a two-layer structure (with some upper and lower configurations different), or a three-layer structure. 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 and the lower fire-resistant sleeve 1703 share a three-layer structure, but the upper fire-resistant sleeve 1600 differs in that it does not have the locking portion 1722 that the fire-resistant cover 1720 of the lower fire-resistant sleeve 1703 has (for fixing to the piping rather than to the building frame).

[0040] 3(D) and 4 has a single layer structure of an inner heat-expandable fire-resistant material (inner fire-resistant tape 1710), and the upper end of the inner heat-expandable fire-resistant material (inner fire-resistant tape 1710) that is the lower fire-resistant sleeve 1701 is located above the upper surface of the building frame (here, the ceiling material 200), and the lower end of the inner heat-expandable fire-resistant material (inner fire-resistant tape 1710) that is the lower fire-resistant sleeve 1701 is located flush with or below the lower surface of the building frame (here, the ceiling material 200). Because the lower heat-expandable fire-resistant material (lower fire-resistant sleeve 1701) is located at a position that overlaps at least the thickness of the ceiling material 200 in the vertical direction, it is possible to block the inside of the drainage collecting pipe 1000.

[0041] In addition, the lower heat-expandable fire-resistant material (lower fire-resistant sleeve 1702) in Figure 3(C) has a two-layer structure consisting of an inner heat-expandable fire-resistant material (inner fire-resistant tape 1710) and a fire-resistant cover 1720, while the lower heat-expandable fire-resistant material (lower fire-resistant sleeve 1703) shown in Figures 3(A), 3(B) and 5 has a three-layer structure consisting 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 a two- or more-layer structure, the lower fire-resistant sleeve 1702 and the lower fire-resistant sleeve 1703 are provided with a fire-resistant cover 1720 (made of rock wool or steel plate) made of a sheet-like non-combustible material wider than the thickness of the flooring material 100 and the ceiling material 200. Because the fire-resistant cover 1720 is provided even when the flooring material 100 and the ceiling material 200 are thin, the inside of the drainage collecting pipe 1000 can be reliably sealed, reliably preventing flames from penetrating into the hollow space of the wooden double floor. Furthermore, in the case of a three-layer structure, sealing the gap between the fire-resistant sleeve and the through-hole prevents flames (including those originating on the upper floor and the lower floor) from penetrating into the hollow space, achieving the desired fire compartment structure. This is true whether the fire-resistant sleeve is provided on the drainage collecting pipe or on the building frame (flooring material 100 or ceiling material 200).

[0042] As shown in Figures 4 and 5, the fire compartment structure of this embodiment is characterized in that a heat-resistant sealant is filled into the gap or applied to the outer peripheral surface of the outer gap between the floor material 100 and the upper heat-expandable fire-resistant material (upper fire-resistant sleeve 1600 fixed to the piping), the inner gap between the drainage manifold 1000 and the lower heat-expandable fire-resistant material (lower fire-resistant sleeve 1700 fixed to the main body) (when the outer gap and the inner gap are not distinguished, they may simply be referred to as the gap), and at least one location on the outer peripheral surface of the lower heat-expandable fire-resistant material (lower fire-resistant sleeve 1700 fixed to the main body) on the underside of the ceiling material 200. The outer gap is a gap (upper side, floor side) that occurs when fixing the piping, and the inner gap is a gap (lower side, ceiling side) that occurs when fixing the building frame, and these gaps are filled with a sealant 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 three locations). More specifically, the outer gap is filled with a silicone sealant SS (upper side, from the upper surface side of the floor material 100), and the inner gap is filled with an internal silicone sealant SSi (lower side, from the underside side of the ceiling material 200) as needed, and an external silicone sealant SSo is applied to the outer peripheral surface of the lower fire-resistant sleeve 1700 on the underside of the ceiling material 200 (lower side, from the underside side of the ceiling material 200) as needed.

[0043] The outer gap is filled with silicone sealing SS from the upper end of the rock wool RW, whose lower end is filled partway into the flooring 100 as a backup material, to the upper surface of the flooring 100, and the inner gap is filled with silicone sealing SSi from the lower end of the inner rock wool RWi, whose upper end is filled partway into the ceiling material 200 as a backup material, to the lower end of the inner fire-resistant tape 1710 of the lower fire-resistant sleeve 1700. An outer silicone sealing SSo is applied to the outer peripheral surface of the lower fire-resistant sleeve 1700 on the underside 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 having such features is provided with thermally expandable refractory materials (refractory sleeves or thermally expandable refractory material 1612) on the upper side (position overlapping at least the vertical thickness of the floor material 100) and the lower side (position overlapping at least the vertical thickness of the ceiling material 200) in the wooden double floor, respectively. Therefore, it is possible to prevent the intrusion of flames into the hollow space from the inside and outside of the upper and lower refractory sleeves, so that the possibility of damage to the wooden materials in the hollow space due to flames and heat can be extremely reduced. Also, a desired fire compartment structure can be realized with a minimum amount of thermally expandable refractory material.

[0045] Further, the lower thermally expandable refractory material (lower refractory sleeve 1700) is separate from the drain collecting pipe 1000 (unlike the upper thermally expandable refractory material (upper refractory sleeve 1600)) and is provided on the ceiling material 200 when constructing the drain collecting pipe 1000 in the through hole of the hollow double floor. For this reason, it is configured to be position-adjustable in the vertical direction, and can easily cope with various floor thicknesses. For example, as shown in FIG. 6, even if the floor thickness is L(1) < L(2), the lower thermally expandable refractory material (lower refractory sleeve 1700) can be constructed to be present at the position of the ceiling material 200 using the same drain collecting pipe 1000 and the lower thermally expandable refractory material (lower refractory sleeve 1700). Incidentally, although it is an example, L(1) = 364 mm and L(2) = 394 mm.

[0046] This lower heat-expandable fire-resistant material (lower fire-resistant sleeve 1700) is then fixed to the ceiling material 200, and as a fixing method, a sheet-like non-combustible material (fire-resistant cover 1720) is provided 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 ceiling material 200. In this case, a part of the outer surface of the sheet-like non-combustible material (fire-resistant cover 1720) (locking part 1722 if the fire-resistant cover 1720 is a steel plate) is locked to the upper surface of the ceiling material 200 and fixed. Therefore, before installing the ceiling material 200, simply by erecting the locking part 1722 (nail, burr) and locking it to the upper surface of the ceiling material 200, it will not fall off or slip out of the through-hole, making installation easy. Furthermore, if this engaging portion 1722 is simply a rectangular portion of the fire-resistant cover 1720 (here assumed to be a steel plate) with three sides cut out and folded outward, its vertical position can be easily changed, making it easy to adjust the positional relationship between the ceiling material and the lower fire-resistant sleeve 1700.

[0047] In addition, on both the upper side (flooring material 100 side) and the lower side (ceiling material 200 side), at least one of the gaps or outer peripheral surfaces, namely the outer gap between the structure (here, flooring material 100) and the upper heat-expandable fire-resistant material (upper fire-resistant sleeve 1600), the inner gap between the drainage manifold (here, lower piping 1510) and the lower heat-expandable fire-resistant material (lower fire-resistant sleeve 1700), and the outer peripheral surface of the lower fire-resistant sleeve 1700 on the underside of the ceiling material 200, is filled with a heat-resistant sealant, and these gaps are provided with rock wool as a backup material. As a result, the heat-expandable fire-resistant material (fire-resistant tape) can expand according to the desired specifications, and the inner fire-resistant tape 1610 and the inner fire-resistant tape 1710 block the inside of the drainage manifold 1000, preventing flames (including flames that have started on the floors above) from penetrating from inside the pipe into the hollow space, and when the outer fire-resistant tape 1630 or the outer fire-resistant tape 1730 is provided, it blocks the space between the fire-resistant sleeve and the through-hole, preventing flames (including flames that have started on the floors above) from penetrating from between the fire-resistant sleeve and the through-hole into the hollow space, thereby achieving the desired fire compartment structure.

[0048] <Fire compartment construction method> A construction method for the fire compartment structure of a wooden double floor according to the present embodiment (shown in FIG. 5) will be described below.

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

[0050] (Step 2) Attach the lower fireproof sleeve 1703 to the dummy pipe. Specifically, the lower fireproof sleeve 1703 is passed through the socket-side insertion port of the dummy pipe and fixed in place with a construction jig. This construction 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 construction 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 dummy pipe is inserted through the through-hole (opening) of the flooring material 100. The spigot of the dummy pipe is inserted into the socket of the drainage standpipe with socket 1530 on the lower floor. The dummy pipe is temporarily fixed with the support member 1010.

[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) Remove the dummy piping. At this point, in addition to the wooden double floor, the only things remaining are the support member 1010, the lower fireproof sleeve 1703 fastened to the upper surface of the ceiling material 200, and the drainage standpipe 1530 with inlet on the lower floor.

[0054] (Step 6) The internal rock wool RWi, which serves as the backup material, is passed through the spigot of the lower pipe 1510, and the drainage collecting pipe 1000 is installed in place of the dummy pipe. The internal rock wool RWi, which serves as the backup material, is inserted between the drainage collecting pipe 1000 and the lower fireproof sleeve 1703. When installing the internal rock wool RWi, which serves as 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) Silicon sealing SS is filled (from the upper side, the upper surface side of the floor material 100) in the outer gap between the floor material 100 and the upper heat-expandable fire-resistant material (upper fire-resistant sleeve 1600 fixed to the piping), and internal silicone sealing SSi is filled (from the lower side, the lower surface side of the ceiling material 200) in the inner gap between the drainage manifold 1000 and the lower heat-expandable fire-resistant material (lower fire-resistant sleeve 1700 fixed to the main body) as needed, and external silicone sealing SSo is applied (from the lower side, the lower surface side of the ceiling material 200) to the outer peripheral surface of the lower fire-resistant sleeve 1700 on the lower surface of the ceiling material 200 as needed (silicone sealing in at least one of three places).

[0056] As described above, the fire compartment structure and fire sleeve according to this embodiment can provide a fire compartment structure that complies with legal regulations regarding the fire resistance of a compartment that includes a resin drainage collecting pipe that is installed through a wooden hollow floor that includes floor 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 floor material and the ceiling material, and a fire sleeve that is a separate member from the drainage collecting pipe that realizes such a fire compartment structure.

[0057] The first to fourth modified examples applicable to the fire compartment structure according to the above-described embodiment will be described below with reference to the drawings. Note that in the drawings referred to for the description of these modified examples, reference numerals may be omitted for the same components as those in the above-described drawings. <First Modification: Steady Rest 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 drainage collection pipe 1000 and the drainage standpipe with inlet 1530 are connected using a plug-in rubber ring joint, and in order to support the drainage standpipe with inlet 1530 due to the fact that the connected drainage collection pipe 1000 and the drainage standpipe with inlet 1530 cannot be fixed to a typical concrete floor (where the floor and ceiling are integrated) during construction, the drainage collection pipe 1000 and the drainage standpipe with inlet 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 piping (here, the lower piping 1510 of the drainage manifold 1000 and the drainage standpipe 1530 with inlet)). As shown in the top view in Figure 7(A) and the side view 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 composed of a substantially annular band 2010 (with a hinge portion 2010H) that grips the piping, and an annular rubber member 2010R that is attached to cover the band 2010 and functions as a buffer between the band 2010 and the piping, 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 the drainage manifold 1000 and the drainage standpipe with inlet 1530 are connected, construction problems caused by the drainage standpipe with inlet 1530, which has been connected first by a plug-in rubber ring joint, vibrating, can be reduced. <Second modified example: The upper thermally expandable fireproof material can be adjusted in the vertical direction>

[0063] In the above-described <Construction Method for Fire Compartment Structure>, the drainage manifold 1000 may be moved up or down due to construction errors. Therefore, in addition to the lower heat-expandable fire-resistant material on the ceiling material side, the upper heat-expandable fire-resistant material on the floor material side may also need to be adjusted in the vertical direction. For this reason, in this modified example, an upper fire-resistant sleeve is provided that allows the positions of not only the lower heat-expandable fire-resistant material but also the upper heat-expandable fire-resistant material to be adjusted in the vertical direction. As described above, the lower heat-expandable fire-resistant material is characterized by being configured to be adjustable in the vertical direction and being located at the position of the ceiling material 200. In addition, in this modified example, the upper heat-expandable fire-resistant material is characterized by being configured to be adjustable in the vertical direction and being located at the position of the floor material 100.

[0064] By vertically moving the outer fire-resistant tape 1630 of the two-layer upper fire-resistant sleeve 1602 or the three-layer upper fire-resistant sleeve 1603, the position of the upper heat-expandable fire-resistant material can be adjusted vertically from the state shown in Fig. 8(A) to the state shown in Fig. 8(B). That is, although not limited thereto, the outer fire-resistant tape 1630 is configured to be vertically movable relative to the fire-resistant cover 1620, and the outer fire-resistant tape 1630 can be slid vertically while the fire-resistant cover 1620 remains fixed.

[0065] As shown in Figure 8(B), this vertical position adjustment can be performed so that the upper end of the upper heat-expandable fire-resistant material (outer fire-resistant tape 1630) is positioned above the upper surface of the floor slab. In this way, by adjusting the outer fire-resistant tape 1630 of the upper fire-resistant sleeve 1602 or the upper fire-resistant sleeve 1603 in the vertical direction, even if the drainage collecting pipe 1000 itself needs to be moved in the vertical direction due to construction errors, the position of the upper heat-expandable fire-resistant material (outer fire-resistant tape 1630) can be moved in the vertical direction, thereby achieving the desired fire compartment structure using a wooden hollow floor. <Third Modification: Drainage Collector Pipe Support Member>

[0066] 7(C) and 9, the vibration-damping function of the support member 1010 (for a drainage collecting pipe) and the method for fixing the support member 1010 according to the third modified example will be added. Schematically, the support member 1010 equipped with this vibration-damping mechanism has a vibration-damping function for preventing the transmission of vibrations to the floor material 100 of the wooden hollow floor, with vibration-damping rubber provided (1) between the support member 1010 and the receiving member 1114 (with rubber ring) supported by the support member 1010, and (2) between the support member 1010 and the floor material 100 to which the support member 1010 is fixed.

[0067] Apart from the vibration-isolating rubber (rubber member) and fastening members (bolts, nuts, etc.), this support member 1010 is made up of metal members processed from, for example, thin metal plates. As shown in the top view in Fig. 9(A), the side view in Fig. 9(B), and the bottom view in Fig. 9(C), the support member 1010 is made up of two approximately semicircular ring-shaped supporting metal bodies 3020 (a pair) that grip the socket member 1114 (with a rubber ring), a rubber member 3020R (which provides vibration-isolating properties between the socket member 1114) that is provided so as to cover the supporting metal bodies 3020, a fastening member 3022 that integrates the pair of supporting metal bodies 3020 and is inserted into a band hole (not shown) to attach the supporting metal body 3020 to the socket member 1114, and a pair of left and right support parts that secure the pair of supporting metal bodies 3020 to the flooring material 100.

[0068] The support section is composed of a pair of left and right fully threaded bolts 3030 that are set up perpendicular to flooring material 100, a pair of upper and lower nuts 3030N that secure supporting metal body 3020 to fully threaded bolts 3030, a vibration-isolating rubber plate 3010 equipped with flooring material fixing holes 3011 for securing support member 1010 to flooring material 100, and vibration-isolating rubber 3030R secured to the top of vibration-isolating rubber plate 3010 with high nuts 3030HN. Support member 1010 is secured to flooring material 100 using flooring material fixing holes 3011 in vibration-isolating rubber plate 3010, for example, with coarse threads (a type of wood screw (biscuit) used for woodworking that is characterized by its strong fastening force) and a washer.

[0069] In this way, when the receiving member 1114 (with rubber ring) of the drainage collecting pipe 1000 is gripped by the support member 1010 and the support member 1010 is fixed to the floor material 100, the rubber member 3020R and vibration-damping rubber 3030R provided on the support member 1010 can suppress the transmission of vibrations from the drainage collecting pipe 1000 to the floor material 100. <Fourth variant: How to install reinforced gypsum board on the ceiling side>

[0070] A method of attaching a reinforced gypsum board on the ceiling side according to a fourth modified example will be described with reference to Fig. 10. As explained in the above embodiment with reference to Fig. 1, 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. Fig. 10(A) shows either the upper (upper floor) side reinforced gypsum board 210 or the lower (lower floor) side reinforced gypsum board 220, which constitute the ceiling material 200 with this through hole 302.

[0071] As shown in Figure 10(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 10(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 10(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.

[0072] 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.

[0073] 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 Figure 5 in the above-mentioned embodiment was heated for one hour under the same conditions (standard heating curve: ISO0834) as in the certification test for the one-hour compartment penetration method, and then left for three hours, and it was confirmed that it had fire resistance that satisfied the following three items: (1) the temperature of the wood in the hollow space is 260°C or less (the temperature at which wood ignites: 260°C), (2) the wood in the hollow space does not carbonize, and (3) the inside of the plastic drainage collecting pipe is completely blocked. In addition, a fire resistance test was conducted by burning from the ceiling side, but the fire compartment structure shown in Figure 5 has been designed to prevent 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]

[0074] The present invention is preferred for a fire compartment structure of a resin drainage collection pipe that penetrates a wooden hollow floor having 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]

[0075] 100 Flooring 200 Ceiling materials 1000 Resin drainage manifold 1010 Support member 1100 Upper pipe 1500 lower tube 1510 Downward piping 1520 socket 1530 Drainage standpipe with inlet 1600 Upper thermal expansion fireproof material (Upper fireproof sleeve 1600, 1601 to 1603) 1700 Lower thermal expansion fireproof material (lower fireproof sleeve 1700, 1701 to 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 from the floor material, wherein a resin drainage collecting pipe is installed through 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. 2. The fire compartment structure according to claim 1, wherein the lower thermally expandable fire-resistant material is configured to be vertically positionable and is located at the position of the ceiling material.

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

4. The lower thermally expandable refractory material is 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 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 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. In the case where the upper heat-expandable fire-resistant material is provided in the pipe wall or the outer cover of the drainage collecting pipe, A single layer structure of sheet-like non-flammable material, A two-layer structure comprising a sheet-shaped non-combustible material and an outer heat-expandable fire-resistant material on the outer layer of the sheet-shaped non-combustible material, or a three-layer structure including a sheet-shaped non-combustible material, 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; The lower thermally expandable refractory material is 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 the gap between the floor material and the upper heat-expandable fire-resistant material, the gap between the drainage manifold and the lower heat-expandable fire-resistant material, and at least one location on the outer peripheral surface of the lower heat-expandable fire-resistant material on the underside of the ceiling material or applied to the outer peripheral surface.

10. A fireproof sleeve that is a separate member from the drainage manifold 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.

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