Installation method for drainage piping components

Abstract

To provide a drain piping joint that can be installed with good workability in a through hole that penetrates a floor slab.SOLUTION: A drain piping joint 101 installed in a through hole of a floor slab is provided with a hard sound insulation cover body 733 on at least a part of an outer peripheral surface of a portion passing through the through hole and is constructed so as to have an elastic material 735 between the sound insulation cover body 733 and an outer surface of the drain piping joint. A construction method comprises the steps of: providing the elastic material 735 at a predetermined position on an inner peripheral surface of the sound insulation cover body 733; installing a sound insulation cover 731 after providing the elastic material 735 in the through hole; and filling a filler M between the outer peripheral surface of the sound insulation cover 731 and the inner peripheral surface of the through hole to fix the sound insulation cover 731 in the through hole, and then inserting a drain piping member other than the sound insulation cover 731 into the installed sound insulation cover 731, so as to integrate the sound insulation cover 731 and the drain piping joint other than the sound insulation cover 731 via the elastic material 735.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a construction method and drainage piping member for installation in a through hole that penetrates a section of a building (for example, a through hole that penetrates a floor slab that is a section of a building), and in particular to a construction method and drainage piping member that can easily install a drainage piping member that can exhibit optimal sound insulation performance, etc. in a through hole. [Background technology]

[0002] Apartment buildings, office buildings, and other such facilities are equipped with water supply and drainage systems. A typical example of drainage systems is a widely known drainage piping structure that includes vertical pipes that run vertically through each floor of the building, horizontal pipes installed within each floor, and drainage pipe joints that connect these. Such drainage piping structures also include sound-insulating outer layer components (sound-insulating covers) to reduce drainage noise.

[0003] In buildings equipped with such drainage piping structures, a fire compartment structure is implemented in the floor slab of the building, which has through-holes, to prevent flames, soot, and toxic gases from leaking to upper floors in the event of a fire or other incident on a lower floor. Such a fire compartment structure is sometimes implemented by separately providing a heat-expandable fire-resistant material on the outer periphery of the piping material. For this reason, some drainage piping (including drainage piping joints, standpipes, etc.) that penetrates the floor slab of a building, including the above-mentioned drainage piping joint, has an outer layer member with sound insulation or an outer layer member containing a heat-expandable material on the outside of the pipe body.

[0004] In concrete-cast floors on each floor of a building, when a compartment penetration structure is required to pass piping from floor to floor or vice versa, a compartment penetration hole is drilled in the concrete. Conventionally, before pouring concrete, a pipe called a void or sleeve is installed vertically and fixed in the floor subfloor, concrete is poured around the sleeve to create a concrete floor, and the concrete is then cured. The hollow space inside the sleeve serves as a compartment penetration hole through which the piping is passed. Because the sleeve is typically made of paper, resin, or metal, it typically requires removal after curing. To provide fire resistance to the compartment penetration structure thus created, an outer layer containing a thermal expansion material must be installed after the piping is installed, and to reduce noise, an outer layer with sound-insulating properties must be installed separately, resulting in cumbersome construction.

[0005] To address this issue, JP 2011-094642 A (Patent Document 1) discloses a piping structure for a compartment penetration part having the following configuration, based on the idea that if the sleeve (sheath tube) itself has thermal expandability, there is no need to pull it out. This piping structure for a compartment penetration part is characterized by comprising a sheath tube made of a fire-resistant resin composition obtained by adding thermally expandable graphite to a synthetic resin, or a sheath tube having a fire-resistant expandable layer made of the fire-resistant resin composition in one layer, an inner tube whose outer diameter is smaller than the inner diameter of the sheath tube and inserted inside the sheath tube, and a spacer inserted into a gap formed between the sheath tube and the inner tube (Claim 1). Furthermore, the gap is characterized by being filled with a sound-absorbing material (Claim 3).

[0006] According to the piping structure in the compartment penetration section disclosed in Patent Document 1, in the event of a fire, the sheath pipe expands thermally to close the penetration section, providing fire resistance, and the gap between the inner pipe and the sheath pipe absorbs drainage noise generated in the inner pipe, reducing structure-borne noise. Furthermore, by filling the gap with sound-absorbing material, drainage noise can be further reduced. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-094642 Summary of the Invention [Problem to be solved by the invention]

[0008] However, in the piping structure of the compartment penetration part disclosed in Patent Document 1, the gap between the sheath pipe, which has a fire-resistant expandable layer made of a fire-resistant resin composition, and the inner pipe inserted inside the sheath pipe is simply filled with sound-absorbing material. Even if it is assumed that drainage noise is low to begin with when a straight pipe is installed in the compartment penetration part disclosed in Patent Document 1 and therefore is unlikely to be a problem, this does not sufficiently reduce drainage noise in the drainage pipe joint installed in the compartment penetration part (which connects vertical pipes that run vertically through each floor of a building with horizontal pipes installed on each floor and allows complexly combined drainage water to flow down to the floors below).

[0009] Such problems are common to various drainage piping components, including drainage piping fittings, which are installed in through holes that penetrate compartments of a building, including not only the floor slabs of the building but also the vertical walls, and which have an outer layer member with sound insulation properties or an outer layer member containing a thermal expansion material on the outside of the pipe body. The present invention was developed in consideration of the above-mentioned problems, and its purpose is to provide a construction method and drainage piping component that can easily install drainage piping components that can exhibit optimal sound insulation performance, etc., into through holes that penetrate a section of a building (for example, through holes that penetrate a floor slab that is a section of a building). [Means for solving the problem]

[0010] In order to achieve the above object, a method for installing a drainage piping component according to one aspect of the present invention employs the following technical means. In other words, a method for installing a drainage piping member according to one aspect of the present invention is a method for installing a drainage piping member in a through hole that penetrates a section of a building, wherein the drainage piping member is installed so that a hard sound-insulating cover is provided on at least a portion of the outer surface of the portion that passes through the through hole and an elastic material is provided between the sound-insulating cover and the outer surface of the drainage piping member, and is characterized by including the steps of providing the elastic material at a predetermined position on the inner surface of the sound-insulating cover, installing the sound-insulating cover in the through hole after the elastic material has been provided, and inserting the drainage piping member into the installed sound-insulating cover after the sound-insulating cover has been installed in the through hole, and integrating the sound-insulating cover and the drainage piping member via the elastic material.

[0011] In addition, another aspect of the present invention relates to a method for installing a drainage piping member in a through hole that penetrates a section of a building, wherein the drainage piping member is installed so that a hard sound-insulating cover is provided on at least a portion of the outer surface of the portion that passes through the through hole and an elastic material is provided between the sound-insulating cover and the outer surface of the drainage piping member, and the method includes the steps of providing the elastic material at a predetermined position on the outer surface of the drainage piping member, installing the sound-insulating cover in the through hole, and, after the sound-insulating cover is installed in the through hole, inserting a drainage piping member equipped with the elastic material into the installed sound-insulating cover and integrating the sound-insulating cover and the drainage piping member via the elastic material.

[0012] Preferably, the method can be configured to further include a step of filling a filler material between the outer surface of the sound-insulating cover and the inner surface of the through hole after the sound-insulating cover is installed in the through hole and before the sound-insulating cover and the drainage piping member are integrated. More preferably, the compartment is a floor slab, and the drainage piping member is a drainage piping joint including a pipe body that is placed in a through-hole of the floor slab when installed in a building, an upper riser pipe connection part that projects above the floor slab and connects to a drainage riser pipe that allows drainage water to flow in from an upper floor, a drainage pipe connection part that projects below the floor slab and connects to a drainage pipe that allows drainage water to flow out to a lower floor, and a horizontal branch pipe connection part that connects a horizontal drainage branch pipe above the floor slab, and the elastic material is The sound-insulating cover may be configured to be installed only at the upper end, or at both the upper end and the lower end, between the sound-insulating cover and the outer surface of the drainage pipe joint.

[0013] More preferably, the step of integrating the sound-insulating cover and the drainage piping member can be configured to leave the sound-insulating cover installed in the compartment in the through hole together with the elastic material, so that the drainage piping member can be removed from the through hole, or to leave the sound-insulating cover installed in the compartment in the through hole, so that the drainage piping member can be removed from the through hole together with the elastic material, thereby integrating them.

[0014] More preferably, the sound insulating cover can be made of a hard resin. More preferably, the sound-insulating cover can be configured to abut against the outer surface of the drainage piping member via a ring-shaped, elastic ring elastic material that corresponds to the outer diameter of the drainage piping member.

[0015] More preferably, the step of providing the elastic material on the sound-insulating cover can be configured to provide the elastic material in a recess in the inner peripheral surface of the sound-insulating cover. More preferably, a vibration insulator may be provided between the sound insulating cover and the drainage piping member, at least in part of the portion passing through the through hole. More preferably, the vibration insulator can be configured to be fixed to the sound-insulating cover on the outer layer side.

[0016] More preferably, after the sound-insulating cover is placed in the through-hole, the length of the sound-insulating cover is equal to or less than the length of the through-hole. More preferably, the drainage piping member is formed from one or more injection-molded resin products, and a heat-expandable fire-resistant material can be provided between the sound-insulating cover and the drainage piping member.

[0017] More preferably, the heat-expandable fire-resistant material can be configured to be provided at a predetermined outer peripheral position of the drainage piping member or at a predetermined inner peripheral position of the sound-insulating cover. More preferably, a vibration insulator is provided between the sound-insulating cover and the drainage piping member, and before they are integrated, the vibration insulator is provided on the sound-insulating cover side, and the heat-expandable fire-resistant material is provided at a predetermined inner peripheral position on the sound-insulating cover so as to be embedded in the vibration insulator.

[0018] More preferably, a vibration insulator is provided between the sound-insulating cover and the drainage piping member, and before they are integrated, the vibration insulator is provided on the sound-insulating cover side, and the heat-expandable fire-resistant material is provided at a predetermined inner peripheral position on the sound-insulating cover so as to be embedded in the vibration insulator. More preferably, a vibration insulator is provided between the sound-insulating cover and the drainage piping member, and before they are integrated, the vibration insulator is provided on the sound-insulating cover side, and the heat-expandable fire-resistant material can be configured to be provided at a predetermined inner peripheral position on the sound-insulating cover so that its surface height in the inner peripheral direction is approximately the same as that of the vibration insulator.

[0019] More preferably, the sound-insulating cover can be configured so that its length can be adjusted in accordance with the thickness of the floor slab. More preferably, the length adjustment can be configured to be performed by at least one of cutting, dividing, and replacing parts of the sound insulating cover. More preferably, the compartment may be configured to be the floor slab of the lowest floor. In order to achieve the above object, the drainage piping member according to still another aspect of the present invention employs the following technical means.

[0020] In other words, a drainage piping member according to yet another aspect of the present invention is a drainage piping member that is installed in a through hole that penetrates a section of a building, wherein the drainage piping member has a hard sound-insulating cover provided on at least a portion of the outer surface of the portion that passes through the through hole, an elastic material is provided between the sound-insulating cover and the outer surface of the drainage piping member, the sound-insulating cover and the drainage piping member are integrated via the elastic material, the drainage piping member is formed from one or more injection-molded resin products, a vibration insulator is provided between the sound-insulating cover and the drainage piping member, the vibration insulator is provided on the sound-insulating cover side before the integration, and a heat-expandable fire-resistant material is provided at a predetermined inner peripheral position on the sound-insulating cover so as to be embedded in the vibration insulator.

[0021] Furthermore, according to yet another aspect of the present invention, there is provided a drainage piping member that is installed in a through hole that penetrates a section of a building, wherein the drainage piping member has a hard sound-insulating cover provided on at least a portion of the outer surface of the portion that passes through the through hole, an elastic material is provided between the sound-insulating cover and the outer surface of the drainage piping member, the sound-insulating cover and the drainage piping member are integrated via the elastic material, the drainage piping member is formed from one or more injection-molded resin products, a vibration insulator is provided between the sound-insulating cover and the drainage piping member, the vibration insulator is provided on the sound-insulating cover side before the integration, and a heat-expandable fire-resistant material is provided at a predetermined inner peripheral position of the sound-insulating cover so as to be embedded in the vibration insulator.

[0022] Furthermore, according to yet another aspect of the present invention, there is provided a drainage piping member that is installed in a through hole that penetrates a section of a building, wherein the drainage piping member has a hard sound-insulating cover provided on at least a portion of the outer surface of the portion that passes through the through hole, an elastic material is provided between the sound-insulating cover and the outer surface of the drainage piping member, the sound-insulating cover and the drainage piping member are integrated via the elastic material, the drainage piping member is formed from one or more injection-molded resin products, a vibration insulator is provided between the sound-insulating cover and the drainage piping member, the vibration insulator is provided on the sound-insulating cover side before the integration, and a heat-expandable fire-resistant material is provided at a predetermined inner peripheral position on the sound-insulating cover so that its surface height in the inner peripheral direction is approximately the same as that of the vibration insulator. [Effects of the Invention]

[0023] According to the present invention, it is possible to provide a construction method and a drainage piping component that can easily install a drainage piping component that can exhibit optimal sound insulation performance, etc., into a through hole that penetrates a section of a building (for example, a through hole that penetrates a floor slab that is a section of a building). [Brief explanation of the drawings]

[0024] [Figure 1] (A) Top view and (B) side view showing a drainage piping structure that uses a drainage pipe fitting 101 constructed using a construction method related to the first embodiment of the present invention or a drainage pipe fitting 103 constructed using a construction method related to the second embodiment (the drainage pipe fitting 101 and the drainage pipe fitting 103 may be represented by the drainage pipe fitting 100). [Figure 2] 2A and 2B are diagrams showing the drainage piping structure of FIG. 1, in which (A) is an oblique view showing the state after an outer layer member 700 has been provided on the drainage pipe fitting 100, and (B) is an oblique view showing the state before the outer layer member 700 has been provided on the drainage pipe fitting 100. [Figure 3]1A and 1B are diagrams showing a drainage pipe fitting 100, in which (A) is an oblique view showing the state after a heat-expandable fire-resistant material 612 and a heat-expandable fire-resistant sheet 712 have been installed, and (B) is an oblique view showing the state before the heat-expandable fire-resistant material 612 and a heat-expandable fire-resistant sheet 712 have been installed. [Figure 4] FIG. 4(A) is an exploded view of the drainage pipe joint 100 shown in FIG. 3(B), and FIG. 4(B) is a perspective view of the pipe body 110 seen through the pipe wall. [Figure 5] 1 is a cross-sectional view (finished construction drawing) showing a drainage piping structure including a drainage piping joint 101 constructed by a construction method according to a first embodiment of the present invention. [Figure 6] FIG. 6 is a diagram for explaining a construction method according to a first embodiment of the present invention, in which a pipe body is set in a sound insulating cover embedded in a slab in the drainage pipe joint 101 of FIG. 5. [Figure 7] 10 is a cross-sectional view (finished construction drawing) showing a drainage piping structure including a drainage piping joint 103 constructed by a construction method according to a second embodiment of the present invention. FIG. [Figure 8] FIG. 8 is a diagram for explaining a construction method according to a second embodiment of the present invention, in which a pipe body is set in a sound insulating cover embedded in a slab in the drainage pipe joint 103 of FIG. 7. [Figure 9] FIG. 7 is a view corresponding to FIG. 5, for explaining a modified example in which a thermally expandable fireproof sheet 712 is provided on the sound insulating cover 731 side in the first embodiment of the present invention. [Figure 10] FIG. 7 is a view corresponding to FIG. 6, for explaining a modified example in which a thermally expandable fireproof sheet 712 is provided on the sound insulating cover 731 side in the first embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] The following describes in detail, with reference to the drawings, a drainage piping member installation method according to an embodiment of the present invention (an installation method according to a first embodiment, an installation method according to a second embodiment, and modifications thereof) and the drainage piping member. The drainage piping member installation method according to the present invention can be widely and suitably applied to drainage piping members (such as joints, collecting pipes, straight pipes, and reduced-diameter pipes) that are installed in through-holes that penetrate a building compartment and have an outer layer member with sound-insulating properties or an outer layer member containing a thermal expansion material on the outside of the pipe body. In the following embodiments, the drainage piping member is described as a drainage piping joint. However, the drainage piping member to which the installation method according to the present invention is suitably applied is not limited to a drainage piping joint, as long as it is installed so that a hard sound-insulating cover is provided on at least a portion of the outer periphery of the portion that passes through a through-hole that penetrates a building compartment and an elastic material is provided between the sound-insulating cover and the outer surface of the drainage piping member. The building compartment may include not only floor slabs but also vertical walls. The present invention not only includes such an installation method but also the drainage piping member (in this embodiment, the drainage piping joint) itself. That is, the drain pipe joint 101 shown in Fig. 5, the drain pipe joint 103 shown in Fig. 7, and the drain pipe joint 105 shown in Fig. 9 (which differs from the drain pipe joint 101 shown in Fig. 5 in that the thermally expandable fire-resistant sheet 712 is on the sound-insulating cover 731 side) are all drain pipe components (drain pipe joints) according to the present invention. Note that, below, the drain pipe joint 105 differs from the drain pipe joint 101 only in the parts that will be described in the modified examples that will be described later, and therefore the drain pipe joint 105 may be described representatively as the drain pipe joint 101.

[0026] An installation method (of drainage pipe fitting 101) according to a first embodiment of the present invention will be described in detail with reference to Figures 5 and 6, and an installation method (of drainage pipe fitting 103) according to a second embodiment of the present invention will be described in detail with reference to Figures 7 and 8. Note that by using the installation method shown and explained in Figure 6, a drainage piping structure employing drainage pipe fitting 101 as shown in Figure 5 (a completed installation drawing) can be installed on a floor slab S (having a through-hole in a building), and by using the installation method shown and explained in Figure 8, a drainage piping structure employing drainage pipe fitting 103 as shown in Figure 7 (a completed installation drawing) can be installed on a floor slab S (having a through-hole in a building).

[0027] Before explaining the construction methods according to these two embodiments, the structure common to the drainage pipe joint 101 and the drainage pipe joint 103 according to the present invention will be described with reference to Figures 1 to 4, with the drainage pipe joint 100 as a representative, and with reference to Figure 5 for the three-layer outer layer member 701 in the drainage pipe joint 101, and with reference to Figure 7 for the three-layer outer layer member 703 in the drainage pipe joint 103. Here, drain pipe fitting 100, drain pipe fitting 101, and drain pipe fitting 103 are significantly different in that sound insulating cover 730 of outermost outer layer member 700 in drain pipe fitting 100 is made up of a soft sound insulating cover main body (a one-piece molded product only) that has elasticity, whereas sound insulating cover 731 of outermost outer layer member 701 in drain pipe fitting 101 and sound insulating cover 741 of outermost outer layer member 703 in drain pipe fitting 103 are made up of a hard sound insulating cover main body that does not have elasticity and an elastic material (rubber packing) that is a separate member from the hard sound insulating cover main body. Since the structure other than these is basically the same, in some cases, sound-insulating cover 731 and sound-insulating cover 741 are represented by sound-insulating cover 730, outer layer member 701 and outer layer member 703 are represented by outer layer member 700, and drain pipe fitting 101 and drain pipe fitting 103 are represented by drain pipe fitting 100.

[0028] More specifically, the sound insulating cover 731 of the outermost layer in the outer layer member 701 of the drainage pipe joint 101 and the sound insulating cover 741 of the outermost layer in the outer layer member 703 of the drainage pipe joint 103 differ in the following points (particularly in relation to the installation method) due to the difference in the location where the elastic material (rubber packing) is provided. In the drainage pipe joint 101, the sound insulating cover 731 of the outermost layer constituting the outer layer member 701 is installed in the through hole with the elastic material (rubber packing) 735 provided on the hard sound insulating cover main body 733, and other components that make up the drainage pipe joint are attached to the sound insulating cover 731 installed in the through hole (sound insulating cover main body 733 + elastic material (rubber packing) 735; and optionally, intermediate layer vibration insulator 720) and installed, whereas in the drainage pipe joint 103, 5 and 7, after construction, they basically have the same structure, as shown in Figures 5 and 7. However, they differ in that the outermost sound-insulating cover 741 constituting the outer layer member 703 is installed in the through hole without the elastic material (rubber gasket) 745 being installed on the sound-insulating cover main body 743 (the elastic material (rubber gasket) 745 is installed on the pipe main body 110 side), and other components that make up the drainage pipe joint are attached to the sound-insulating cover 741 (only the sound-insulating cover main body 743) installed in the through hole.

[0029] [Common points for the installation methods of the two embodiments: except for soft sound-insulating covers] The drain pipe fitting 100 common to the two embodiments of the present invention will be described in detail below with reference to Figures 1 to 4. Here, the perspective views shown in Figures 2 to 4 are drawn schematically, and may not be completely consistent with other drawings (e.g., Figures 5 to 8) (for example, the presence or absence of a drain pipe connected to the drain pipe fitting 100, the presence or absence of vibration-damping material 714 provided outside the receiving portion of the upper riser pipe connecting portion 120 and outside the receiving portion of the horizontal branch pipe connecting portion 140, and the shape of the swirl vane 114). Furthermore, 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, and the inner layer side, the inner peripheral side, and the inside may not be clearly distinguished from one another.

[0030] <Summary> 1, 5, and 7, the drainage piping structure using the drainage pipe fittings 100 includes the drainage pipe fittings 100 installed in through holes that vertically penetrate a floor slab S of a building, upper floor drainage standpipes 520 connected to these drainage pipe fittings 100 above the floor slab S and allowing drainage water to flow in from the upper floors, (here, three) horizontal drainage branch pipes 510 connected to these drainage pipe fittings 100 above the floor slab S, and lower floor drainage standpipes 530 connected to these drainage pipe fittings 100 below the floor slab S and allowing drainage water to flow out to the lower floors. Note that these drainage piping structures are merely examples, and the construction method of the present invention is not limited to the drainage piping structures shown.

[0031] Here, the drain pipe joint 100 used in these drain pipe structures and the drain pipe connected to this drain pipe joint 100 are made of non-fire-resistant resin. However, the drain pipe joint according to the present invention may be limited to such non-fire-resistant resin or may not be limited to resin. However, there are cases where the drainage pipe fitting 100 and the drainage pipe connected to this drainage pipe fitting are made of non-fire-resistant resin, and cases where the drainage pipe is not limited to resin will be described as appropriate in the description. Here, "non-fire-resistant" refers to a property that allows deformation, melting, or combustion due to the heat generated by a fire in a building, and this applies to materials made of resin, for example. Furthermore, when resin is used, the drainage pipe fitting 100 and the piping connected to it (the horizontal drainage branch pipe 510, the upper floor drainage standpipe 520, and the lower floor drainage standpipe 530) are molded from, for example, polyvinyl chloride, polyethylene, polybutene, polypropylene, or nylon. Note that the drainage standpipe may be made of, for example, a so-called two-layer fire-resistant pipe.

[0032] The drainage pipe joint 100 is formed of one or more (seven in this example) injection-molded resin products, as shown in Figures 4(A), 5, and 7. When installed in a building, the drainage pipe joint 100 includes a pipe main body 110 that is placed in a through-hole in a floor slab S, an upper riser connection part 120 that protrudes above the floor slab S and connects a drainage standpipe 520 that allows drainage water from the upper floor to flow in, a drainage pipe connection part 130 that protrudes below the floor slab S and connects a drainage pipe (here, drainage standpipe 530) that allows drainage water to flow out to the lower floor, and a horizontal branch pipe connection part 140 that connects a horizontal drainage branch pipe 510 above the floor slab S, as shown in Figures 1, 4(A), 5, and 7.

[0033] As shown in these figures, in the drainage pipe fitting 100, the lateral branch pipe connecting part 140 is composed of a water collection chamber 142 with three openings spaced 90° apart in a plan view, and a first lateral branch pipe connecting member 144, a second lateral branch pipe connecting member 146, and a third lateral branch pipe connecting member 148 for connecting the drainage lateral branch pipe corresponding to the positions of the openings. Here, although not limited thereto, the first lateral branch pipe connecting member 144, the second lateral branch pipe connecting member 146, and the third lateral branch pipe connecting member 148 all connect the drainage lateral branch pipe 510 without reducing the diameter or the like, but the pipe diameter may be variable.

[0034] The pipe body 110 provided in the drain pipe joint 100 has a swirl vane 114 as a protrusion that protrudes from the inner surface of the pipe body 110 between the horizontal branch pipe connection part 140 and the drain pipe connection part 130. A depression 112 corresponding to this protrusion (here, the swirl vane 114) is formed on the outer surface of the pipe body 110, and a putty-like heat-expandable fire-resistant material 612 is filled in this depression 112 as shown in FIG.

[0035] Here, the thermally expandable fire-resistant material 612 filled in the recess 112 will be described. The thermally expandable fire-resistant material 612 may be formed, for example, from a resin composition containing a resin primarily composed of butyl rubber, a phosphorus compound, neutralized thermally expandable graphite, a hydrated inorganic material, and a metal carbonate, or a resin composition containing an epoxy resin, a phosphorus compound, neutralized thermally expandable graphite, and an inorganic filler. For example, the thermally expandable fire-resistant material 612 may be manufactured by Sekisui Chemical Co., Ltd. under the trade name "Fi-Block" (expands 5 to 40 times at a reaction temperature of 200°C). Other examples of the thermally expandable fire-resistant material 612 include "Thermal Expandable Heat-Resistant Sealant IP" manufactured by Inaba Electric Industry Co., Ltd. (expands starting at 120°C and expands to 4 times or more in volume) and "Heatmel" manufactured by Furukawa Techno Material Co., Ltd. (expansion starting temperature 120°C, significant expansion temperature 260°C, expands 4 to 8 times).

[0036] The thermally expandable fire-resistant material 612 is not limited to the above, and a wide variety of materials with different reaction temperatures and expansion rates can be used. Therefore, the most suitable material that meets the various conditions such as the reaction temperature and pipe diameter required depending on the installation location within the building can be selected and used. The heat-expandable fire-resistant material 612 is formed in a non-hardening, non-drying putty-like form, and is applied to the drain pipe joint 100 so as to fill the recess 112 on the outer surface of the pipe body 110 up to the outer diameter of the pipe body 110 (together with or without the heat-expandable fire-resistant sheet 712, which will be described later). The amount of fill is sufficient to achieve the desired fire resistance without overfilling.

[0037] Here, the protrusions provided on the pipe body 110 are not limited to swirl vanes 114, but may be deflector vanes or the like, as long as they are parts that change the flow of wastewater within the drainage pipe joint 100, and are not limited to swirl vanes or deflector vanes, as long as they form corresponding depressions 112 on the outer surface of the pipe body 110. The thermally expandable fire-resistant material 612 is filled into the depressions on the outer peripheral surface of this drainage pipe joint 100.

[0038] Furthermore, at a height position corresponding to the floor slab S of the pipe body 110, a sheet-like heat-expandable fire-resistant sheet 712 is provided so as to be wrapped around the outer circumferential surface of the pipe body 110, as shown in Figures 3 and 5. The heat-expandable fire-resistant material 612 and the heat-expandable fire-resistant sheet 712 are spaced apart in the vertical direction in the pipe body 110. The dashed dotted line in Figure 3 indicates that they can be removed.

[0039] In a building employing such a drainage piping structure, if the drainage pipe fitting 100 or the like catches fire, the heat will cause the thermally expandable fire-resistant material 612 and the thermally expandable fire-resistant sheet 712 to expand radially inward, causing the main body of the drainage pipe fitting 100 to crush the hollow portion and close off the drainage pipe fitting 100. This allows the drainage piping structure using these drainage pipe fittings 100 to shut off the pipeline to prevent the flow of flames, smoke, etc. in the event of a fire.

[0040] Here, as mentioned above, such heat-expandable refractory materials (heat-expandable fire-resistant material 612, heat-expandable fire-resistant sheet 712) are limited to those made of resin, and as will be described later, if the heat-expandable fire-resistant sheet 712 of such heat-expandable refractory materials cannot be provided (in this part regardless of the reason), it is preferable to provide vibration-damping material 714 instead of the heat-expandable fire-resistant sheet 712.

[0041] With reference to Figures 5 and 7, the drain pipe fitting 100 will be described with reference to the outer layer member 700 that is provided to be wrapped around the outer periphery of the pipe main body 110. In more detail, the outer layer member 701 of the drain pipe fitting 101 will be described with reference to Figure 5, and the outer layer member 703 of the drain pipe fitting 103 will be described with reference to Figure 7. However, here, the outer layer member 701 (sound-insulating cover 731) of the drain pipe fitting 101 and the outer layer member 703 (sound-insulating cover 741) of the drain pipe fitting 103 will be described as being represented by the outer layer member 700 (sound-insulating cover 730) of the drain pipe fitting 100. Therefore, the outer layer member 700 (sound-insulating cover 730) in the text corresponds to the outer layer member 701 (sound-insulating cover 731) in Figure 5 and the outer layer member 703 (sound-insulating cover 741) in Figure 7. As shown in these figures, this outer layer member 700 has a three-layer structure, and is provided on the outer surface of the pipe body 110 in the following order from the outer surface of the drainage pipe fitting 100: vibration-damping material 714 (or heat-expandable fire-resistant sheet 712), vibration insulator 720 made of fire-resistant inorganic fiber, and sound-insulating cover 730.

[0042] The recess 112 is filled with a heat-expandable fire-resistant material 612, which provides fire resistance (fire spread prevention function), and also provides vibration damping and sound insulation performance because the hollow recess 112 is filled with the putty-like heat-expandable fire-resistant material 612. In the drainage pipe joint 100, the vibration-damping material 714 is attached to the outer surface of the pipe body 110 (over the entire surface, for example with an adhesive or pressure-sensitive adhesive) so as to cover the heat-expandable fire-resistant material 612 filled in the recess 112. In terms of fire resistance, a heat-expandable fire-resistant sheet 712 is attached to the outer surface of the pipe body 110 in place of the vibration-damping material 714 at a position on the pipe body 110 above the portion of the recess 112 filled with the heat-expandable fire-resistant material 612. The heat-expandable fire-resistant sheet 712 attached to the outer surface of the pipe body 110 in this way also exhibits vibration-damping performance similar to the vibration-damping material 714 (although the performance may not be equivalent).

[0043] As will be described in more detail below, the thermally expandable fire-resistant material 612 and the thermally expandable fire-resistant sheet 712 have different thermal expansion coefficients. Generally, a thermally expandable fire-resistant material with a high thermal expansion coefficient has poor shape retention after expansion, while a thermally expandable fire-resistant material with a low thermal expansion coefficient has good shape retention after expansion. A low thermal expansion coefficient may not provide sufficient fire resistance, while a low shape retention may cause the thermally expandable material to fall off. Taking into account this trade-off characteristic and the thermal expansion coefficients (and the absolute value of the difference between them), the thermally expandable materials contained in the thermally expandable fire-resistant material 612 and the thermally expandable fire-resistant sheet 712 are selected according to their respective positions, weights, shapes, reaction speeds, and expansion start temperatures.

[0044] Thus, the innermost layer 710 in this three-layer structure is either a thermally expandable fireproof sheet 712 or a vibration-damping material 714 . The vibration-damping material 714 is formed containing a butyl-based material (butyl rubber, etc.) or an asphalt-based material (rubber asphalt, modified asphalt, etc.), the sound-insulating cover 730 is formed containing a rubber-based material (EPDM (ethylene propylene diene rubber), etc.), an elastomer-based material, or an olefin-based material (polyethylene resin, etc.), and the vibration insulator 720 formed from fire-resistant inorganic fibers is an aggregate (porous material) of fire-resistant inorganic fibers. Note that, as will be described later, the sound-insulating cover main body 733 constituting the sound-insulating cover 731 and the sound-insulating cover main body 743 constituting the sound-insulating cover 741 are made of hard resin, unlike the sound-insulating cover 730 made of soft rubber.

[0045] Here, examples of inorganic fibers include artificial mineral fibers, such as glass wool, rock wool, or ceramic fiber, which are preferred for their high vibration insulation and sound absorption properties. Vibrations caused by wastewater flowing down the pipe body 110 (e.g., vibrations generated by hitting the swirl vanes 114) are suppressed by the vibration-damping material 714. Vibrations are further blocked (and / or noise associated with the vibrations) by the vibration insulator 720 made of rock wool or the like (and / or absorbs the noise associated with the vibrations). Furthermore, the propagation of noise associated with the vibrations is blocked by the sound-insulating cover 730 made of a rubber cover such as EPDM. The blocking of noise associated with the vibrations by the sound-insulating cover can also be achieved by the sound-insulating covers 731 and 741, which are made of a hard resin sound-insulating cover body with an elastic material (rubber packing). Here, rock wool is a general term for materials made primarily from natural rock or steel slag such as blast furnace slag, while glass wool is a general term for cotton-like materials composed of glass fibers. Both are fire-resistant and flame-resistant.

[0046] In the following, we may explain the case where butyl rubber is used as vibration damping material 714, rock wool is used as vibration insulator 720, and an EPDM rubber cover is used as sound-insulating cover 730, but these materials are merely examples (as sound-insulating cover 731 and sound-insulating cover 741 are made of hard resin rather than soft rubber like sound-insulating cover 730).

[0047] When rock wool is used as the vibration insulator 720, it is preferable to use a sheet-shaped rock wool manufactured by papermaking that is designed to be unfolded in a way that prevents it from falling in the event of a fire (for example, a rock wool sheet that is designed to be unfolded in a way that prevents it from falling in the event of a fire) and wrap it around the outside of the innermost layer 710 of the three-layer structure as the vibration insulator 720. Furthermore, the vibration insulator 720 using this rock wool is provided so as to be fixed loosely and at several points in the circumferential direction rather than being fixed all around, in order to suppress noise propagation due to resonance with the vibration-damping material 714 or the thermally expandable fire-resistant sheet 712 on the inner layer side. In particular, the height positions of the several fixing positions in the circumferential direction where the rock wool is fixed (more specifically, where the rock wool is fixed to the EPDM rubber cover as the sound-insulating cover 730) are determined based on the thermal expansion material (thermally expandable fire-resistant material 612 and thermally expandable fire-resistant sheet 712). This prevents the rock wool from falling in the event of a fire. Examples of attachment methods that prevent the rock wool from falling include bonding with adhesives, double-sided tape, etc.

[0048] Below, a manufacturing method (not an installation method) for the drainage pipe joint 100 equipped with the outer layer member 700 of this three-layer structure, that is, a procedure for attaching the outer layer member 700, will be described. First, the recess 112 is filled with a putty-like heat-expandable fire-resistant material 612. Then, a heat-expandable fire-resistant sheet 712 is attached. In the drainage pipe joint 100, the heat-expandable fire-resistant sheet 712 is separated from the putty-like heat-expandable fire-resistant material 612. Furthermore, a vibration-damping material 714 is attached to the outer peripheral surface of the pipe body 110 with an adhesive or pressure-sensitive adhesive. At this time, the innermost layer 710 of this three-layer structure is either the heat-expandable fire-resistant sheet 712 or the vibration-damping material 714. Note that, although not in a layer, the heat-expandable fire-resistant material 612 filled in the recess 112 is present further inner than the heat-expandable fire-resistant sheet 712.

[0049] After the thermally expandable fireproof sheet 712 and the vibration-damping material 714 are provided, a rock wool sheet serving as vibration insulator 720 is wrapped around the sheet. This is then covered with an EPDM rubber cover serving as sound-insulating cover 730. Here, the EPDM rubber cover serving as sound-insulating cover 730 exhibits water-stopping properties, sound insulation, and vibration insulation properties. Furthermore, sound-insulating cover 731 and sound-insulating cover 741, each of which has a hard resin sound-insulating cover body and an elastic material (rubber packing), can also exhibit water-stopping properties, sound insulation, and vibration insulation properties. The EPDM rubber cover serving as sound-insulating cover 730 may be integrally molded and bonded to drainage pipe joint 100 to exhibit water-stopping properties, or it may be unbonded and exhibit water-stopping properties solely through tension (due to the elasticity of the rubber).

[0050] These drainage pipe fittings 100, outlined above, are formed from one or more injection-molded resin products and are installed by penetrating the floor slab S of a building, thereby fully demonstrating fire resistance and suppressing drainage vibrations. In particular, in the three-layer outer layer member 700, the innermost layer 710 is made of vibration-damping material 714, for example, butyl rubber, which is tightly attached to the outer surface of the pipe body 110 to extremely effectively suppress vibrations, the middle layer is made of vibration insulator 720, for example, a rock wool sheet, which is loosely fixed in several places to provide sound absorption, fire resistance, sound insulation, and vibration insulation, and the outermost layer is made of sound-insulating cover 730, for example, an EPDM rubber cover, to provide water-stopping, sound insulation, and vibration insulation (sound-insulating cover 731 or sound-insulating cover 741, which has a hard resin sound-insulating cover body and an elastic material (rubber gasket) attached to it, may also provide these properties). Vibrations caused by wastewater flowing down the pipe body 110 (for example, generated when hitting the swirl vanes 114) are suppressed by the vibration-damping material 714, and then the vibration is further blocked by the vibration insulator 720, and further, the sound-insulating cover 730 blocks the generation of noise associated with the vibration, so that wastewater vibrations can be extremely effectively suppressed. In addition, two heat-expandable fire-resistant materials (heat-expandable fire-resistant material 612 and heat-expandable fire-resistant sheet 712) are provided, and the outside of these is covered with multiple layers, including a layer that exhibits fire-resistant performance, so that the fire-resistant performance can be fully exerted. The drain pipe fitting 100 is described in more detail below.

[0051] <Vibration damping material: Drainage pipe fittings are not limited to those made of resin> The vibration-damping material 714 of the innermost layer 710 constituting the outer layer member 700 of the drainage pipe joint 100 is integrally provided on at least a portion of the outer peripheral surface of at least the portion of the pipe body 110 that passes through the through-hole of the floor slab S. Note that it is not limited to being provided on the entire outer peripheral surface of the pipe body 110, and it may be provided on only a portion of the outer peripheral surface of the pipe body 110 (as long as that position overlaps the floor slab S).

[0052] The damping material 714 has the following properties on the outer peripheral surface on which the damping material 714 is provided: It is preferable that the damping material 714 is integrally provided on the entire surface by adhesion or bonding. Furthermore, it is preferable that the damping material 714 is formed in a sheet shape and wrapped around the outer circumferential surface. In this way, by providing the innermost layer 710, which is made of vibration-damping material 714, for example butyl rubber, in close contact with at least a portion of the outer peripheral surface (outer surface) of the pipe body 110 and integrating it with the drain pipe fitting, vibrations occurring in the drain pipe fitting can be extremely effectively suppressed.

[0053] It is also preferable to use a two-layer outer layer member in which vibration insulator 720, for example, rock wool, is provided on the outer periphery of vibration damping material 714, and it is also preferable to use a three-layer outer layer member in which sound-insulating cover 730, for example, an EPDM rubber cover, is provided on the outer periphery of vibration insulator 720. When this three-layer structure is adopted, it is preferable to provide vibration insulator 720 so that it is fixed not to vibration damping material 714 on the inner layer side but to sound-insulating cover 730 on the outer layer side.

[0054] More specifically, in the drainage pipe joint 100, the pipe body 110 has at least a straight pipe section 116 and a reduced diameter section 118 below this straight pipe section 116, and in this case, the vibration insulator 720 is preferably provided so as to be fixed intermittently in the circumferential direction of the sound-insulating cover 730 in a height range corresponding to the straight pipe section 116. Also, in the drainage pipe joint 100, the vibration insulator 720 is preferably provided so as to be fixed by point attachment at two to four locations in the circumferential direction of the sound-insulating cover 730 on the outer layer side.

[0055] In this way, by providing vibration insulator 720, an example of which is a rock wool sheet, as an intermediate layer and fixing it loosely and in several places to sound insulating cover 730 on the outer layer side rather than to vibration damping material 714 on the inner layer side, sound absorption properties, fire resistance (when a heat-expandable fire-resistant material is provided instead of / in addition to vibration damping material 714), sound insulation properties, and vibration insulation properties, and by providing sound insulating cover 730, an example of which is an EPDM rubber cover, as the outermost layer and providing water stoppage, sound insulation properties, and vibration insulation properties, it is possible to extremely effectively suppress vibrations generated in the drainage pipe joint.

[0056] As described above, when these drainage pipe joints 100 are formed from one or more (seven in this case) resin injection-molded products (non-fireproof) (when the drainage pipe joints are limited to being made of resin), it is also preferable to provide a sheet-like heat-expandable fire-resistant sheet 712 in place of at least a portion of the vibration-damping material 714, which is provided (attached) to the outer circumferential surface of at least the portion of the pipe body 110 that passes through the through-hole of the floor slab S. In this case, in the drainage pipe joint 100, the sheet-like heat-expandable fire-resistant sheet 712 is provided on the pipe body 110 in place of a portion of the vibration-damping material 714 provided on the pipe body 110.

[0057] In this way, if the drainage pipe fitting 100 or the like catches fire, the heat will cause the heat-expandable fire-resistant sheet 712 to expand radially inward, crushing the hollow part of the drainage pipe fitting 100 and blocking the drainage pipe fitting 100.As a result, a drainage piping structure using these drainage pipe fittings 100 can block the pipeline to prevent the flow of flames, smoke, etc. in the event of a fire. Furthermore, in the drainage pipe fitting 100, the pipe body 110 has at least a straight pipe section 116 and a reduced diameter section 118 below this straight pipe section 116, and in this case, it is also preferable that a heat-expandable fire-resistant sheet 712 is provided on the inner layer side of the vibration insulator 720 in place of part of the vibration-damping material 714, and that the vibration insulator 720 is fixed to the sound-insulating cover 730 on the outer layer side at a position above the heat-expandable fire-resistant sheet 712 and at a height position corresponding to the straight pipe section 116.

[0058] In this way, even if the drainage pipe joint 100 or the like catches fire, the vibration insulator 720 is fixed to the outer layer sound insulating cover 730 at a height position corresponding to the straight pipe section 116 and above the height position of the drainage pipe joint 100 that is blocked by the thermally expandable fireproof sheet 712, so that the vibration insulator 720 is prevented from falling in the event of a fire. can be done.

[0059] <Soundproof cover: Drainage pipe joints are not limited to those made of resin> The outermost sound-insulating cover 730 constituting the outer layer member 700 of the drainage pipe fitting 100 is provided on the outer periphery of the vibration insulator 720 over the entire vertical length of the vibration insulator 720 which is provided on at least a portion of the outer periphery of at least the portion of the pipe body 110 which passes through the through hole of the floor slab S.

[0060] By providing a sound insulating cover 730, for example an EPDM rubber cover, around the outer periphery of the vibration insulator 720 over the entire length in the vertical direction, it is possible to achieve high sound insulating performance. The sound-insulating cover 730, which is an example of an EPDM rubber cover, has water-stopping, sound-insulating, and vibration-insulating properties, and therefore exhibits high water-stopping and vibration-insulating properties in addition to the above-mentioned sound-insulating properties.

[0061] Furthermore, it is preferable that sound-insulating cover 730 has an upper-end water-stopping portion only at the upper end, or an upper-end water-stopping portion at the upper end and a lower-end water-stopping portion at the lower end. If the sound-insulating cover main body is made of a hard resin that does not have elasticity, as will be described later, these upper-end water-stopping portions or lower-end water-stopping portions correspond to elastic material (rubber packing) 735 or elastic material (rubber packing) 745 (which are separate members from the sound-insulating cover main body and form the sound-insulating cover together with the sound-insulating cover main body) that are provided so as to abut against the outer surface of drainage pipe joint 100. These elastic materials (rubber packings) can exhibit high water-stopping performance, etc.

[0062] In addition, when the sound-insulating cover 730 is an elastic rubber cover made of EPDM, it is preferably molded integrally with the cover body having a length corresponding to the overall vertical length of the vibration insulator 720, including the upper end water-stopping portion and the lower end water-stopping portion, and the sound-insulating cover 730 itself is elastic. When sound-insulating cover 730 itself has elasticity in this way, the elasticity of sound-insulating cover 730 itself can be used to provide the sound-insulating cover 730 on the outer periphery over the entire vertical length of vibration insulator 720. Note that sound-insulating cover 731 and sound-insulating cover 741, which have a sound-insulating cover body made of hard resin and an elastic material (rubber packing), do not have such elasticity.

[0063] <Thermal expansion fire-resistant material: Drainage pipe joints are basically limited to plastic> In the drainage pipe joint 100, two types of thermally expandable fire-resistant materials with different thermal expansion coefficients, namely, a thermally expandable fire-resistant material 612 and a thermally expandable fire-resistant sheet 712, are provided. First, in these drainage pipe fittings 100, when two types of heat-expandable fire-resistant materials are provided at different radial positions, it is preferable that the heat-expandable fire-resistant material provided on the inner layer side has a higher thermal expansion coefficient than the heat-expandable fire-resistant material provided on the outer layer side.

[0064] Next, in these drainage pipe joints 100, when two types of heat-expandable fire-resistant materials are provided at different positions in the vertical direction, it is preferable that the heat-expandable fire-resistant material provided at the upper side has a higher thermal expansion coefficient than the heat-expandable fire-resistant material provided at the lower side. However, there are cases where this relationship in the vertical thermal expansion coefficients does not hold. As mentioned above, it is generally believed that a thermally expandable fire-resistant material has poor shape retention after expansion if its thermal expansion coefficient is high, and good shape retention if its thermal expansion coefficient is low, so there is a trade-off relationship in which a low thermal expansion coefficient may not provide sufficient fire resistance, and a low shape retention may cause the thermally expandable material to fall off. Taking these characteristics into consideration (utilizing the characteristics), and further taking into account the respective positions, weights, shapes, reaction speeds, and expansion onset temperatures, two types of thermally expandable fire-resistant materials are selected.

[0065] As for the characteristics of the thermally expandable fire-resistant material depending on its shape, between the putty-type and sheet-type employed in this embodiment, the putty-type thermally expandable fire-resistant material generally has a higher thermal expansion coefficient than the sheet-type thermally expandable fire-resistant material. Four examples of possible applications of thermally expandable fire-resistant material placement in drainage pipe fittings (installed in through holes in floor slab S, with or without a reduced diameter section) are described.

[0066] First, when the height positions are the same (here, "same" means that there is no difference in height that would require consideration of the placement of the heat-expandable fire-resistant material), but the radial positions are different, the thermal expansion coefficient of the heat-expandable fire-resistant material on the inner layer in the radial direction is higher than that of the heat-expandable fire-resistant material on the outer layer. Because the putty-like material has a higher thermal expansion coefficient than the sheet-like material, the heat-expandable fire-resistant material 612 on the inner layer has a higher thermal expansion coefficient than the heat-expandable fire-resistant sheet 712 on the outer layer.

[0067] Next, when the radial positions are the same (here, "same" means that there is no radial difference that would warrant considering the placement of the heat-expandable fire-resistant material), but the vertical positions are different, the thermal expansion coefficient of the heat-expandable fire-resistant material on the upper side in the vertical direction is higher than the thermal expansion coefficient of the heat-expandable fire-resistant material on the lower side. Furthermore, when both the radial position and the vertical position are different, the heat-expandable fire-resistant material with a high thermal expansion coefficient is arranged on the upper vertical side and the inner radial layer side, and the heat-expandable fire-resistant material with a low thermal expansion coefficient is arranged on the lower vertical side and the outer radial layer side.

[0068] Finally, because two types of heat-expandable fire-resistant materials are provided at different positions in the vertical direction, normally (as described above) the heat-expandable fire-resistant material with a high thermal expansion coefficient would be placed at the upper height position, and the heat-expandable fire-resistant material with a low thermal expansion coefficient would be placed at the lower height position, but in drainage pipe joint 100, putty-like heat-expandable fire-resistant material 612 filled in recess 112 is used as the lower heat-expandable fire-resistant material, and sheet-like heat-expandable fire-resistant sheet 712 is used as the upper heat-expandable fire-resistant material. Because the putty-like material has a higher thermal expansion coefficient than the sheet-like material, the lower heat-expandable fire-resistant material 612 has a higher thermal expansion coefficient than the upper heat-expandable fire-resistant sheet 712.

[0069] In the drainage pipe joint 100, the pipe body 110 has a reduced diameter section 118 below the straight pipe section 116, and a putty-like heat-expandable fire-resistant material 612 with a high thermal expansion coefficient is used in the reduced diameter section 118, so that the reduced diameter section 118 with a small pipe diameter is quickly blocked by the putty-like heat-expandable fire-resistant material 612 with a high thermal expansion coefficient. On the other hand, because the shape stability is low (it becomes easy to fall off), the outer layer side of the heat-expandable fire-resistant material 612 is covered with a vibration insulator 720 such as rock wool, which also has fire resistance and flame-blocking properties, and by maintaining the shape of the reduced diameter section 118, where the pipe diameter gradually becomes smaller, this putty-like heat-expandable fire-resistant material 612 is prevented from falling off, thereby compensating for the low shape stability.

[0070] As described above, there may be exceptions to the height direction in the arrangement of the thermally expandable fire-resistant materials based on the thermal expansion coefficient. The thermally expandable fire-resistant materials may be a combination of two sheets, a combination of two putty-type ...

[0071] In addition to the examples of arrangement of heat-expandable fire-resistant materials described above, another example is that in a case where the pipe body 110 has at least a straight pipe section 116 and a reduced diameter section 118 below this straight pipe section 116, two types of heat-expandable fire-resistant materials are provided at different radial positions within the height range of the straight pipe section 116. Furthermore, in another example, two types of heat-expandable fire-resistant materials with different thermal expansion coefficients are provided in the straight pipe section 116 and the reduced diameter section 118. For example, the drainage pipe joint 100 is such an example.

[0072] Another example is where two types of heat-expandable fire-resistant materials having different thermal expansion coefficients are provided so as to have overlapping portions. Another example is where at least one of the two types of heat-expandable fire-resistant materials with different thermal expansion coefficients is provided at a position corresponding to the floor slab S. For example, the drainage pipe joint 100 is such an example, where the heat-expandable fire-resistant sheet 712 is hindered by the floor slab S and cannot expand toward the outer layer side, but can only expand toward the inner layer side in the radial direction, thereby quickly crushing and blocking the hollow part of the drainage pipe joint 100.

[0073] As described above, such thermally expandable fire-resistant materials with different thermal expansion coefficients are preferably provided in either a ring-shaped form in which the material is sheet-shaped and provided in a ring shape around the straight pipe section 116 of the drainage pipe joint 100, or in a putty-like form that is filled into the recess 112 of the drainage pipe joint 100. In this way, vibration damping properties can be exhibited by the sheet-shaped thermally expandable fire-resistant material provided in a ring-shaped form and the putty-like thermally expandable fire-resistant material provided in a filled form.

[0074] <Installation method of the drainage pipe joint 100: Basically, the drainage pipe joint is limited to being made of resin> The following describes a construction method for placing and constructing the drainage pipe joint 100 in a through-hole in the floor slab S of a building. The drainage pipe joint 100 that is preferably employed in this construction method further has the following structural features.

[0075] This drainage pipe joint 100 is formed entirely from one or more resin injection moldings, and when installed in a building, it comprises a pipe body 110 placed in the through-hole of the floor slab S, an upper riser pipe connection part 120 that connects a drainage standpipe 520 that protrudes above the floor slab S and allows drainage water from the upper floor to flow in, a drainage pipe connection part 130 that protrudes below the floor slab S and connects a drainage pipe (here, a drainage standpipe 530) that allows drainage water to flow out to the lower floor, and a drainage pipe connection part 130 that connects a drainage standpipe 520 that protrudes below the floor slab S and allows drainage water to flow out to the lower floor. A drainage piping joint having a horizontal branch pipe connection part 140 that connects a drainage horizontal branch pipe 510 above the slab S, and further structural features include the fact that the upper riser pipe connection part 120 or the horizontal branch pipe connection part 140 is formed of transparent resin, vibration-damping material 714 is provided integrally with the pipe main body 110 on at least a portion of the outer surface of the pipe main body 110, and the receiving portion of the upper riser pipe connection part 120 or the receiving portion of the horizontal branch pipe connection part 140 does not have any shielding material that would prevent the transparent resin from being seen. In this way, before construction, this drainage pipe fitting 100 has vibration-damping material 714 integrally provided with the pipe body 110 on at least a portion of the outer surface of at least the portion of the pipe body 110 that passes through the through hole in the floor slab S, and the upper riser pipe connection portion 120 or the horizontal branch pipe connection portion 140 is formed of transparent resin, and the receiving portion of the upper riser pipe connection portion 120 or the receiving portion of the horizontal branch pipe connection portion 140 does not have any obstruction that would prevent the transparent resin from being visible.

[0076] In this drainage pipe fitting 100, the upper riser pipe connection part 120 or the horizontal branch pipe connection part 140 is formed of a transparent resin (including both colorless and transparent) and, before construction, no shielding material is provided that would prevent the transparent resin from being seen in the receiving portion of the upper riser pipe connection part 120 or the receiving portion of the horizontal branch pipe connection part 140. Note that, here, before construction, vibration-damping material 714 is provided in parts other than the receiving portion of the upper riser pipe connection part 120 or the receiving portion of the horizontal branch pipe connection part 140, but it is also possible that no vibration-damping material 714 is provided at all and that it is installed later after construction.

[0077] The construction method for placing the drainage pipe joint 100 further having such structural features in a through hole in the floor slab S of a building and constructing it is as follows: the fitting state between the upper riser pipe connecting part 120 and the drainage riser pipe 520 is visually recognized (while being recognized) through the transparent resin of the upper riser pipe connecting part 120, and the fitting state between the horizontal branch pipe connecting part 140 and the horizontal drainage branch pipe 510 is visually recognized (while being recognized) through the transparent resin of the horizontal branch pipe connecting part 140, and the drainage pipe joint is The horizontal branch pipe 510 is connected to the horizontal branch pipe connecting portion 140 .

[0078] Then, while visually checking (recognizing) the receiving port portion of the transparent resin in this manner, the drainage riser pipe 520 is connected to the upper riser pipe connection portion 120 and the drainage horizontal branch pipe 510 is connected to the horizontal branch pipe connection portion 140, and after the drainage pipe fitting 100 has been placed in the through hole of the floor slab S, mortar M is filled into the gap between the through hole of the floor slab S and the drainage pipe fitting 100. Furthermore, after filling with this mortar M, a sound-insulating member is provided on the outer periphery of the upper riser pipe connecting portion 120 or the outer periphery of the horizontal branch pipe connecting portion 140. This sound-insulating member is different from the above-described sound-insulating cover 730 (basically, although it may be the same), and is described as a general name that has vibration-damping and / or vibration-insulating properties in addition to sound-insulating properties as the name suggests. Examples of such sound-insulating members include providing the above-described vibration-damping material 714 in the receiving portion, providing the above-described vibration-insulating material 720 typified by rock wool and / or a sound-insulating cover 730 formed of a rubber cover made of EPDM or the like instead of / in addition to the vibration-damping material 714, or providing a glass wool vibration insulator different from rock wool and / or a sound-insulating cover formed of a cover made of vinyl chloride or the like instead of / in addition to the vibration-damping material 714. In this case, it is also preferable to provide vibration-damping material 714 on the inner layer side of this sound-insulating material at the receiving portion of the upper riser pipe connection portion 120 or the horizontal branch pipe connection portion 140 (and also at other portions including the receiving portion if vibration-damping material 714 is not provided other than at the receiving portion before construction).

[0079] In this case, the sound-insulating member may be installed so as to cover the outer periphery of the drainage pipe joint 100, or the sound-insulating member may include glass wool as a sound-absorbing material and a vinyl chloride sound-insulating sheet as a sound-insulating cover, and the glass wool sound-absorbing material may be fixed (including by sewing, adhesive, etc.) to the vinyl chloride sound-insulating cover on the outer layer (rather than to the vibration-damping material 714 on the inner layer).

[0080] In this way, before construction of the drainage pipe fitting 100, the receiving portion of the upper riser pipe connecting portion 120 or the horizontal branch pipe connecting portion 140, which is formed of transparent resin, does not have any shielding material that would obscure the transparent resin, so the fitted state of the upper riser pipe connecting portion 120 and the drainage riser 520 or the fitted state of the horizontal branch pipe connecting portion 140 and the horizontal drainage branch pipe 510 can be visually confirmed through the transparent resin to connect the drainage pipes, thereby reducing construction errors. Also, since the soundproofing member containing rock wool, glass wool, or the like as a sound-absorbing material is attached to the drainage pipe fitting 100 after backfilling with mortar M, the outer diameter of the drainage pipe fitting 100 does not increase when backfilling with mortar M, making it easier to backfill with mortar M, and also eliminating the possibility of moisture from the mortar M splashing onto the rock wool, glass wool, or the like and wetting them.

[0081] As described above, the drain pipe connection portions of the drain pipe fitting 100 are formed from transparent resin, and construction of the drain pipe fitting 100 can be started before construction in a state where the transparent resin at the receiving portions of those connections can be visually observed (no obstructions that would obscure the transparent resin at the receiving portions), so the connection state of the drain pipe fitting 100 to other drain pipes can be visually confirmed while connecting, which reduces construction errors, makes it easier to backfill with mortar M because a soundproofing material containing rock wool, glass wool, or the like is provided after backfilling with mortar, and eliminates the possibility of wetting the rock wool, glass wool, or the like with moisture in the mortar M. Then, after construction of this drain pipe fitting 100, as described above, drainage vibrations can be extremely effectively suppressed, fire resistance can be fully exhibited, and high water-stopping performance can be exhibited.

[0082] [Common points for the installation methods of the two embodiments: except for hard sound-insulating covers] In the above-described embodiment, the sound-insulating cover 730 is formed by including a rubber-based material (such as EPDM (ethylene propylene diene rubber)), an elastomer-based material, or an olefin-based material (such as polyethylene resin) and is therefore elastic (stretchable). The construction methods according to the embodiments of the present invention (construction method according to the first embodiment and construction method according to the second embodiment) differ in that the sound-insulating cover is composed of a sound-insulating cover body made of hard resin and an elastic material (rubber packing) that is a separate member from the sound-insulating cover body.

[0083] In the above-described embodiment, sound-insulating cover 730, which constitutes the outermost layer of the three-layer outer layer of the drainage pipe joint, is formed from a rubber, elastomer, or olefin-based material, and is stretchable (elastic), exhibiting vibration-damping, sound-insulating, and water-tight properties. When this sound-insulating cover 730 is attached to a drainage pipe joint (more precisely, when this sound-insulating cover 730 is attached to the main body of a drainage pipe joint that has two layers of vibration-damping material 714 and vibration insulator 720 attached to the pipe body), the sound-insulating cover is bonded to the main body with an adhesive to ensure watertightness. The workability of attaching sound-insulating cover 730 may be poor.

[0084] Although this is not a major problem with the drainage pipe joint according to the embodiment described above, when setting this sound-insulating cover 730, the procedure is to apply adhesive, stretch the sound-insulating cover using its elasticity (to increase the inner diameter), set the sound-insulating cover 730 so that it covers the drainage pipe joint that does not include the sound-insulating cover 730, wipe off any excess adhesive, and confirm that the adhesive has hardened and the sound-insulating cover has been joined to the main body. For this reason, if the procedure is complicated or if it takes time for the adhesive to harden, this setting operation may take a long time.

[0085] In contrast, the sound-insulating cover for a drainage pipe joint, for which the installation method according to this embodiment is preferably employed, has a fixed shape because the sound-insulating cover body does not have any stretchability (elasticity). The sound-insulating cover is placed over a drainage pipe joint that does not include the sound-insulating cover (it cannot be stretched because it has no stretchability (elasticity)), and an elastic material (rubber packing) is provided between the inner peripheral surface of the sound-insulating cover and the outer surface of the drainage pipe joint. The sound-insulating cover is joined to the drainage pipe joint (without using adhesives, etc.) via this elastic material (rubber packing). In this way, by combining this elastic material (rubber packing) with a sound-insulating cover body made of hard resin to form a sound-insulating cover, workability can be improved and watertightness, sound insulation, and vibration insulation properties can be achieved.

[0086] Below, we will explain the outline of drainage pipe joints for which the installation method of this embodiment is preferably adopted (more specifically, drainage pipe joint 101 in which an elastic material (rubber packing) to which the installation method of the first embodiment is preferably applied is provided on the sound-insulating cover side, and drainage pipe joint 103 in which an elastic material (rubber packing) to which the installation method of the second embodiment is preferably applied is provided on the drainage pipe joint (main body) side). When explaining matters common to sound-insulating cover 731 of drainage pipe joint 101 and sound-insulating cover 741 of drainage pipe joint 103, they may be represented by sound-insulating cover 730, which is the same as in the embodiment described above. In the installation method according to the embodiment of the present invention, the drainage pipe joint is installed so as to have the following configuration.

[0087] The sound-insulating cover (sound-insulating cover 731 or sound-insulating cover 741) of these drain pipe joints (drain pipe joint 101 or drain pipe joint 103) includes a hard cover body (more specifically, sound-insulating cover body 733 or sound-insulating cover body 743) with a length corresponding to the overall vertical length of the vibration insulator 720 (it does not matter as long as it is long enough to cover at least a part of the outer circumferential surface of the part that passes through the through-hole), and is constructed so as to include an elastic material (rubber packing) (more specifically, elastic material (rubber packing) 735 or elastic material (rubber packing) 745) only at the upper end or at the upper and lower ends (here, not only at the upper end but at the upper and lower ends) between the cover body and the outer surface of the drain pipe joint. As described above, the elastic material (rubber gasket) provided at the upper end functions as an upper end water-stopping portion, and the elastic material (rubber gasket) provided at the lower end functions as a lower end water-stopping portion, and the sound-insulating cover abuts against the outer surface of the drainage pipe joint via the elastic material (rubber gasket), thereby providing water-stopping properties.In addition, by combining the elastic material (rubber gasket) with the sound-insulating cover main body, which does not have elasticity, the sound-insulating cover is able to provide sound-insulating and vibration-insulating properties in addition to water-stopping properties.

[0088] Here, the elastic material (rubber gasket) is installed so that it is provided on the inner surface of the sound-insulating cover main body (sound-insulating cover main body 733) (in the case of the installation method according to the first embodiment) or on the outer surface of the drainage pipe joint (lower part 905 of the water collection chamber of the horizontal branch pipe connection part 140) (in the case of the installation method according to the second embodiment). Here, in the case where the elastic material (rubber gasket) 735 is provided on the sound-insulating cover main body 733 to form the sound-insulating cover 731, more specifically, in the case where the construction method according to the first embodiment is adopted in which the sound-insulating cover 731 (sound-insulating cover main body 733 + elastic material (rubber gasket) 735: and optionally vibration insulator 720) is set (installed) in the through hole and then the drainage pipe fitting (main body) is installed (inserted into the sound-insulating cover), the elastic material (rubber gasket) 735 is installed (so as to be fitted into the recesses) in the inner surface of the sound-insulating cover main body 733 of the sound-insulating cover.

[0089] As described above, the cover body (sound insulation cover body 733 or sound insulation cover body 743) that does not have flexibility is made of hard resin and is installed. 5 and 6, the sound-insulating cover (sound-insulating cover 731) is installed so as to abut against the outer surface of the drainage pipe joint 101 via a ring-shaped elastic ring material (rubber ring) 900 that is ring-shaped and elastic and corresponds to the outer diameter of the drainage pipe joint 101 (more specifically, the outer diameter of the water collection chamber lower part 905 of the horizontal branch pipe connection part 140). Note that this embodiment can also be applied to the drainage pipe joint 103 shown in Figures 7 and 8 (it is just shown in Figures 5 and 6 but not in Figures 7 and 8).

[0090] In addition, a vibration insulator 720 is provided between the sound-insulating cover (sound-insulating cover 731 or sound-insulating cover 741) and the drain pipe fitting (drain pipe fitting 101 or drain pipe fitting 103) and in at least a portion of the portion passing through the through hole, and the vibration insulator 720 is installed so as to be fixed to the sound-insulating cover (sound-insulating cover 731 or sound-insulating cover 741) on the outer layer side. As described above, the vibration insulator 720 is preferably fixed intermittently in the circumferential direction of the sound-insulating cover 730 (including the sound-insulating cover 731 or the sound-insulating cover 741 in this paragraph) in the height range corresponding to the straight pipe section 116, and although it has been explained that the vibration insulator 720 is preferably fixed by spot attachment at two to four locations in the circumferential direction of the outer-layer sound-insulating cover 730, it is also preferable to fix it as follows instead: The vibration insulator 720 is preferably installed so that it is fixed to the outer-layer sound-insulating cover 730 by being fixed continuously or intermittently around the entire circumference of the outer side of the vibration insulator 720 at at least one location in the height direction of the outer-layer sound-insulating cover 730.

[0091] The following will explain in more detail (separately divided into a first embodiment and a second embodiment) the materials of the sound insulating cover and elastic material, etc., as well as the construction method of the drainage pipe joint. Here, the elastic material (rubber packing) may be provided on the sound insulating cover side (first embodiment described later) or on the drain pipe joint (main body) side (second embodiment described later), but regardless of these differences, the elastic material (rubber packing) forms part of the sound insulating cover. Details of this will be described later, but the sound insulating cover 731 in the drain pipe joint 101 to which the installation method according to the first embodiment is suitably applied is composed of a sound insulating cover main body 733 and an elastic material (rubber packing) 735, and the elastic material (rubber packing) 735 is provided on the inner peripheral surface of the sound insulating cover main body 733, and the installation method according to the second embodiment is suitably applied The sound-insulating cover 741 in the drain pipe joint 103 is composed of a sound-insulating cover main body 743 and an elastic material (rubber packing) 745, and the elastic material (rubber packing) 745 is provided on the outer peripheral surface of the drain pipe joint 103. Furthermore, in these two embodiments (the first embodiment and the second embodiment), this elastic material (rubber packing) is provided only on the upper end or on the upper end and lower end between the cover main body and the outer surface of the drain pipe joint, thereby achieving the above-mentioned water-stopping function, etc. By configuring the sound-insulating cover in this manner in these two embodiments (i.e., by configuring the sound-insulating cover to include the elastic material (rubber packing)), the sound-insulating cover 731 or the sound-insulating cover 741 in these two embodiments is installed so as to achieve water-stopping, sound-insulating, and vibration-insulating properties, just like the sound-insulating cover 730 in the embodiment described above.

[0092] Here, the sound-insulating covers of the drain pipe joint 101 and the drain pipe joint 103, which are suitably applied to the embodiments (first and second embodiments) of the installation method described in detail below, differ in that, while the sound-insulating cover of the drain pipe joint 100 according to the above-described embodiment was formed from an elastic (stretchable) rubber-based material, this cover is changed to one formed from a hard resin material. As described above, the provision of a ring elastic member (rubber ring) 900 is also a difference, but this ring elastic member (rubber ring) 900 can also be employed in the drain pipe joint 100 according to the above-described embodiment. Other structures that are the same as those of the drain pipe joint 100 described above are assigned the same reference numerals as those of the drain pipe joint 100 described above. The explanations thereof overlap with those described above, and will not be repeated here.

[0093] Here, typical examples of hard resins used for the cover bodies (sound insulating cover bodies 733 and 743) of the sound insulating covers in the drainage pipe joint 101 and the drainage pipe joint 103 that are suitably applied to the embodiments (first and second embodiments) of the installation method include vinyl chloride and polyethylene. Furthermore, it is also preferable to form such hard resins from resin materials such as olefin-based materials (resin compositions containing 300 to 600 parts by weight of inorganic filler per 100 parts by weight of olefin-based resin).

[0094] The inorganic filler is not particularly limited, but examples thereof include silica, diatomaceous earth, alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, ferrites, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, barium carbonate, dawnnite, hydrotalcite, calcium sulfate, barium sulfate, gypsum fiber, calcium silicate, talc, clay, mica, montmorillonite, bentonite, activated clay, sepiolite, imogolite, sericite, glass fiber, glass beads, silica-based balun, aluminum nitride, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, carbon balun, charcoal powder, various metal powders, potassium titanate, magnesium sulfate, lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powders, slag fiber, fly ash, and dewatered sludge.

[0095] Of these, calcium carbonate is preferably used as the inorganic filler in view of the balance between weight and cost. These may be used alone or in combination of two or more. The olefin resin is not particularly limited, but examples thereof include low-density polyethylene, high-density polyethylene, linear low-density polyethylene, atactic polypropylene, isotactic polypropylene, syndiotactic polypropylene, and poly-α-olefin.

[0096] Furthermore, it may be formed of a material other than an olefin-based material, for example (as described above). Polyvinyl chloride resin, polystyrene resin, ABS resin, AS resin, elastomer material, etc. may also be used. In the following embodiments (first and second embodiments) of the installation method, the hard resin used for the cover body of the sound-insulating cover will be described as being vinyl chloride.

[0097] Here, the material used as the elastic material (rubber packing) that constitutes part of the sound insulating cover in the drain pipe joint 101 and the drain pipe joint 103 that are suitably applied to the embodiments (first and second embodiments) of the installation method is a rubber material that can generally be used as a so-called packing, and representative examples include EPDM (ethylene propylene diene rubber) and SBR (styrene butadiene rubber). In addition to these, thermoplastic elastomers, polyethylene foam, etc. can also be used.

[0098] In the following embodiments (first and second embodiments) of the construction method, the rubber material used as the elastic material (rubber packing) of the sound-insulating cover will be described as EPDM (ethylene propylene diene rubber). Furthermore, the material used for the ring elastic member (rubber ring) 900 is not limited, but the same material as the elastic member (rubber packing) described above can be used.

[0099] [Installation method according to the first embodiment: Elastic material (rubber packing) on ​​the sound-insulating cover side] A construction method according to a first embodiment of the present invention and a drainage pipe joint 101 to which the construction method according to the first embodiment is suitably applied will be described in detail below with reference to Figures 5 and 6. Figure 5 is a cross-sectional view (finished construction drawing) showing a drainage piping structure including the drainage pipe joint 101 after construction by the construction method according to the first embodiment, and Figure 6 is a diagram for explaining a construction method (construction method according to the first embodiment) for constructing the drainage pipe joint 101 with a sound-insulating cover 731 (more precisely, the sound-insulating cover 731 consisting of a sound-insulating cover main body 733 and an elastic material (rubber packing) 735, and optionally a vibration insulator 720) in the drainage pipe joint 101 in a through-hole opened in a floor slab S of a building which is the construction site of the drainage pipe joint.

[0100] As shown in these figures, the sound-insulating cover 731 provided for the drainage pipe joint 101 includes a hard sound-insulating cover main body 733 having a length corresponding to the overall vertical length of the vibration insulator 720 (as described above, the length is sufficient to cover at least a portion of the outer periphery of the portion passing through the through hole), and an elastic material (rubber packing) 735 is provided only at the upper end or at the upper and lower ends between the sound-insulating cover main body 733 and the outer surface of the drainage pipe joint 101. In these figures, the elastic material (rubber packing) 735 is provided at both the upper and lower ends between the sound-insulating cover main body 733 and the outer surface of the drainage pipe joint 101, but it may also be provided only at the upper end. This elastic material (rubber packing) 735 enables the drainage pipe joint 101 to exhibit water-stopping, sound-insulating, and vibration-insulating properties (similar to the above-described embodiment, although the material of the sound-insulating cover 730 is different from that in the above-described embodiment). Here, as described above, in the case where the sound insulating cover 731 is constituted by providing the elastic material (rubber packing) 735 on the sound insulating cover main body 733, more specifically, in the case where the construction method according to the first embodiment is adopted in which the sound insulating cover 731 (sound insulating cover main body 733 + elastic material (rubber packing) 735) is set (installed) in the through hole and then the drain pipe joint (main body) is installed (inserted into the sound insulating cover), the construction is performed so that the elastic material (rubber packing) 735 is provided (fitted into the recesses) in the recesses (more specifically, the upper recess 733DU and the lower recess 733DD) on the inner circumferential surface of the sound insulating cover main body 733 of the sound insulating cover. Here, with regard to these two recesses, if the elastic material (rubber packing) 735 is provided only on the upper side, the lower recess 733DD is provided on the sound insulating cover main body 733. It is not necessary to provide this. Note that, as shown in Fig. 6, this elastic material (rubber packing) 735 has a return portion with a V-shaped cross section to make it easier to insert the drain pipe joint 101 other than the sound insulating cover 731 from above the sound insulating cover 731 and to prevent it from returning midway through insertion. Note that, as shown in Fig. 8, the elastic material (rubber packing) 745 of the drain pipe joint 103, to which the installation method according to the second embodiment described later is suitably applied, also has a return portion in the same way (but does not have a recess).

[0101] In the drainage pipe fitting 101 to which the construction method of the first embodiment is suitably applied, this elastic material (rubber gasket) 735 is provided on the inner surface of the sound-insulating cover main body 733, which differs from the drainage pipe fitting 103 to which the construction method of the second embodiment is suitably applied, in which the elastic material (rubber gasket) 735 is provided on the outer surface of the drainage pipe fitting. As described above, the sound-insulating cover main body 733 is made of hard resin.

[0102] Since the drainage pipe fitting 101 installed in the through hole of the floor slab S by suitably applying the installation method according to the first embodiment has such a configuration, the outer layer member 701 has a three-layer structure, and from the outer surface of the drainage pipe fitting 101, the vibration-damping material 714 (or the heat-expandable fire-resistant sheet 712), the vibration insulator 720 formed from fire-resistant inorganic fiber, and the sound-insulating cover 731 (the sound-insulating cover main body 733 and the elastic material (rubber packing) 735) are provided on the outer surface of the pipe main body 110 in this order. However, since the elastic material (rubber packing) 735 constituting the outermost layer of the sound-insulating cover 731 abuts against the outer surface of this drainage pipe fitting 101, the fact that the sound-insulating cover 731 has a portion that becomes the innermost layer is ignored because the abutting area of ​​the elastic material (rubber packing) 735 is small (this is the same for both the drainage pipe fitting 100 and the drainage pipe fitting 103).

[0103] As described above, in this drainage pipe fitting 101, the elastic material (rubber gasket) 735 is provided on the inner surface of the sound-insulating cover main body 733 of the sound-insulating cover 731 (more specifically, the upper recess 733DU and the lower recess 733DD), and therefore, in the installation method of the first embodiment, the sound-insulating cover 731 (more precisely, the sound-insulating cover main body 733 and elastic material (rubber gasket) 735 that constitute the sound-insulating cover 731, and optionally the vibration insulator 720) is installed in the through hole, and the drainage pipe fitting 101 (more precisely, other than the sound-insulating cover main body 733, elastic material (rubber gasket) 735 and vibration insulator 720 that constitute the sound-insulating cover 731) is inserted into the sound-insulating cover 731 installed in the through hole.

[0104] 5 and 6, the sound-insulating cover 731 abuts against the outer surface of the drain pipe joint 101 via a ring-shaped elastic member (rubber ring) 900 having elasticity and ring shape corresponding to the outer diameter of the drain pipe joint 101. The connection between the horizontal branch pipe connecting portion 140 and the pipe main body 110 in this drain pipe joint 101 is such that the horizontal branch pipe connecting portion 140 is fitted into the pipe main body 110 (the inner peripheral surface of the fitting portion 902 of the pipe main body 110 is joined to the outer peripheral surface of the fitting portion 904 of the horizontal branch pipe connecting portion 140), and therefore a step is generated between the outer peripheral surface of the horizontal branch pipe connecting portion 140 and the outer peripheral surface of the pipe main body 110, with the pipe main body 110 protruding, as shown by the open triangle mark in FIG. 17, when sound insulating cover 731 (more precisely, sound insulating cover 731 plus, optionally, vibration insulator 720) is set on drainage pipe joint 101 (more precisely, something other than sound insulating cover 731 and vibration insulator 720), this step can make it difficult to set sound insulating cover 731. For this reason, in order to eliminate this step, a ring elastic member (rubber ring) 900 is provided on the outer peripheral surface of water collection chamber lower part 905 of horizontal branch pipe connecting part 140, and the step is eliminated as shown by the filled triangle and open triangle.

[0105] This ring elastic member (rubber ring) 900 has an inner diameter corresponding to the outer diameter of the fitting portion 904 of the horizontal branch pipe connecting portion 140 (= the outer diameter of the water collecting chamber lower portion 905), and its thickness (outer diameter) corresponds to the outer diameter of the fitting portion 902 of the pipe main body 110. When 0 is set into the fitting portion 904 of the horizontal branch pipe connection portion 140, the outer diameter of the ring elastic material (rubber ring) 900 becomes the position indicated by the black triangle mark, which becomes approximately equal to the outer diameter of the fitting portion 902 of the pipe main body 110 indicated by the white triangle mark, thereby eliminating the above-mentioned step and improving the workability of setting the sound-insulating cover 731 (more precisely, the sound-insulating cover 731 plus, optionally, the vibration insulator 720) to the drainage pipe fitting 101 (more precisely, other than the sound-insulating cover 731 and the vibration insulator 720).

[0106] This ring elastic material (rubber ring) 900 can be preferably applied not only to the drain pipe fitting 101 to which the construction method of the first embodiment is suitably applied, but also to the drain pipe fitting 103 to which the construction method of the second embodiment is suitably applied, and also in cases where the sound-insulating cover body is made of a rubber-based material such as EPDM (i.e., all of the drain pipe fittings of the above-mentioned embodiments).

[0107] In the above-described embodiment, the vibration insulator 720 is fixed to the outer-layer-side sound-insulating cover 730 by spot-fixing at two to four locations in the circumferential direction, but the present invention is not limited to this. For example, in the drainage pipe fitting 100, the drainage pipe fitting 101, and the drainage pipe fitting 103 according to the above-described embodiment, the vibration insulator 720 may be fixed to the outer-layer-side sound-insulating cover by being fixed continuously or intermittently around one circumference of the outer side of the vibration insulator 720 at least one location in the height direction of the outer-layer-side sound-insulating cover. In this way, by providing a vibration insulator 720, an example of which is a rock wool sheet, as an intermediate layer, loosely and continuously or intermittently for the entire outer circumference, and fixing it to the sound-insulating cover on the outer layer side instead of the vibration-damping material 714 on the inner layer side, sound absorption, fire resistance (when a heat-expandable fire-resistant material is provided instead of / in addition to the vibration-damping material 714), sound insulation, and vibration insulation properties are exhibited, and by providing a sound-insulating cover 731, an example of which is a hard cover made of polyvinyl chloride (sound-insulating cover main body 733 and elastic material (rubber gasket) 735) as the outermost layer, water stoppage, sound insulation, and vibration insulation properties are exhibited, the construction method of the first embodiment can be suitably applied, and vibrations generated in the drainage pipe fitting 101 installed in the through hole of the floor slab S can be extremely effectively suppressed.

[0108] In this way, the drainage pipe fitting 101 installed in the through hole of the floor slab S by suitably applying the installation method of the first embodiment can also exhibit the same functional effects as the drainage pipe fitting 100 of the above-mentioned embodiment. The construction method according to the first embodiment will be described in detail with reference to Fig. 6. This construction method is a construction method in which the drainage pipe joint 101 is constructed in a through-hole opened in a floor slab S of a building, which is the construction site of the drainage pipe joint 101, according to the procedure shown in Fig. 6, and construction is completed by this construction method as shown in the completed construction drawing of Fig. 5.

[0109] A distinctive feature of this construction method is that the sound-insulating cover (including an elastic material (rubber packing)) is set (placed) in the through-hole of the floor slab S, the sound-insulating cover is embedded in the floor slab S with a filler M such as mortar, and then the drainage pipe joints other than the sound-insulating cover are set (inserted) into the embedded sound-insulating cover. Note that the step of embedding the sound-insulating cover in the floor slab S with a filler M such as mortar is not an essential requirement of the construction method according to the present invention, taking into account the PC boards and the like described below. More specifically, the construction method according to the first embodiment includes the following three steps.

[0110] (1-1: Elastic material setting step) Elastic material (rubber packing) 735 is provided at a predetermined position on the inner peripheral surface of sound insulation cover 731 (more precisely, sound insulation cover main body 733). At this time, the elastic material (rubber packing) 735 is installed (so as to fit into) the recesses (more specifically, upper recess 733DU and lower recess 733DD) on the inner peripheral surface of sound insulation cover main body 733 of the sound insulation cover.

[0111] (1-2: Sound insulation cover installation step) The outermost part after installing the elastic material (rubber packing 735) A layer of sound insulating cover 731 and a vibration insulator 720, which is secured to the sound insulating cover 731, including but not limited to, are placed in the through hole. (1-3: Integration step) After the sound-insulating cover 731 (more precisely, the sound-insulating cover 731 and, optionally, the vibration insulator 720) is installed in the through-hole, the drainage pipe joint 101 (other than the sound-insulating cover 731 and the vibration insulator 720) is inserted into the installed sound-insulating cover 731 (more precisely, the sound-insulating cover 731 and, optionally, the vibration insulator 720), and the sound-insulating cover 731 and the drainage pipe joint 101 (other than the sound-insulating cover 731 and the vibration insulator 720) are integrated via the elastic material (rubber packing) 735. At this time, the ring elastic material (rubber ring) 900 eliminates the step (shown by the open triangle in Figure 6 ) between the outer circumferential surface of the horizontal branch pipe connection part 140 and the outer circumferential surface of the pipe main body 110, whereby the pipe main body 110 protrudes, improving the workability of this integration step.

[0112] Here, this integration step is almost synonymous with the step of performing water-stopping treatment, and more specifically, it refers to the step in which the sound-insulating cover main body 733 is joined to the drainage pipe fitting 101 (without using adhesive, etc.) via an elastic material (rubber gasket) 735, and the elastic material (rubber gasket) 735 is constructed so that water-stopping performance and vibration-damping performance are exhibited. Furthermore, this integration step is a step in which the sound-insulating cover 731 (more precisely, the sound-insulating cover 731 plus, optionally, the vibration insulator 720) installed on the floor slab S is left in the through-hole together with the elastic material (rubber gasket) 735, and the drainage pipe fitting 101 (other than the sound-insulating cover 731 and the vibration insulator 720) is integrated so that it can be removed from the through-hole, which is preferable from the standpoint of the renewal process of the drainage pipe fitting (renewing anything other than the sound-insulating cover 731 and the vibration insulator 720, or renewing anything other than the sound-insulating cover 731, or renewing anything other than the sound-insulating cover main body 733).

[0113] Furthermore, the construction method according to the first embodiment may further include the following filling step as an optional requirement. (1-4: Filling step) After the sound-insulating cover 731 is installed in the through-hole and before the step of integrating the sound-insulating cover 731 with the drainage pipe fitting 101, filler material M is filled between the outer surface of the sound-insulating cover 731 and the inner surface of the through-hole, and the sound-insulating cover 731 is embedded and fixed in the through-hole.

[0114] That is, the construction method according to the first embodiment is suitably applied to the drainage pipe fitting 101, and as shown in Figure 6, a sound-insulating cover 731 (more precisely, a sound-insulating cover 731 consisting of a sound-insulating cover main body 733 and an elastic material (rubber gasket) 735, plus, optionally, a vibration insulator 720) is installed in the through hole of the floor slab S, and then the drainage pipe fitting 101 (more precisely, everything other than the sound-insulating cover 731 and the vibration insulator 720) is inserted into and integrated with the sound-insulating cover 731 (more precisely, the sound-insulating cover 731, plus, optionally, the vibration insulator 720) installed in the through hole.

[0115] Thus, according to the installation method of the first embodiment, the sound-insulating cover 731 (more precisely, the sound-insulating cover 731 and, optionally, the vibration insulator 720) having an elastic material (rubber gasket) 735 provided in a recess on the inner surface of the sound-insulating cover main body 733 is first installed in the through hole of the floor slab S (and, optionally, after filling the space between the outer surface of the sound-insulating cover 731 and the inner surface of the through hole with filler M), and then the drainage pipe fitting 101 (more precisely, other than the sound-insulating cover 731 and the vibration insulator 720) is inserted from above the sound-insulating cover 731 and integrated, thereby allowing the drainage pipe fitting 101 to be installed in the through hole. For this reason, before concrete is poured for the floor slab S, the void pipe is fixed vertically to the floor subfloor, concrete is poured around it to create a concrete floor, and then cured. In the case where the cavity formed inside the void pipe is used as a through hole, the paper, resin or metal void pipe is usually pulled out after curing (metal void pipes may not be pulled out), and the gap between the through hole and the drainage pipe joint is filled with a filler. However, if sound-insulating covers 731 (or, more precisely, sound-insulating covers 731 plus, optionally, vibration insulators 720) are used instead of such void pipes (if the sound-insulating covers are fixed vertically to the floor substrate before concrete is poured for the floor slab S and concrete is poured around them to create a concrete floor), this is preferable because it eliminates the need to fill the gaps between the through-holes and the drainage pipe joints with filler (and also eliminates the need to remove the void pipes since no void pipes are used in the first place). In this case, it is preferable that the length of the sound-insulating cover be the same as or shorter than the thickness of the slab (so as not to interfere with on-site work of pouring concrete around the sound-insulating cover). In other words, after the sound-insulating cover is installed in the through-hole, the length of the sound-insulating cover will be equal to or shorter than the length of the through-hole.

[0116] Furthermore, when carrying out construction in this manner, when updating the drainage pipe fittings, it is preferable to leave the sound-insulating cover 731 (more precisely, the sound-insulating cover 731 plus, optionally, the vibration insulator 720) in the through hole of the floor slab S, so that everything other than the sound-insulating cover 731 (more precisely, everything other than the sound-insulating cover 731 and the vibration insulator 720, etc.) can be updated. To shorten the construction period, it is also possible to pre-cast the drainage pipe joints into the PC (precast concrete) panels at the PC panel manufacturing factory where the panels are manufactured. In this case, rather than first drilling through-holes in the floor slab S, installing drainage pipe joints in the through-holes, and then filling the gap (the gap between the through-hole and the drainage pipe joint) with a filler, it is conceivable that the drainage pipe joints would be directly filled into the PC panels at the PC panel manufacturing factory. Based on this assumption, it is conceivable that the sound-insulating cover would be directly embedded (cast) into the PC panel in advance, similar to the use of a sound-insulating cover instead of the void pipe described above. In other words, since the gap between the drainage pipe joint and the through-hole in the floor slab is not filled with a filler, in the construction method according to the first embodiment of the present invention, the (1-4) filling step of filling the gap with a filler was described as not being an essential requirement of the construction method according to the first embodiment, as described above. Even in this case, as mentioned above, it is preferable that the length of the sound-insulating cover be equal to or shorter than the thickness of the slab (here, the thickness of the PC board) (so as not to interfere with the PC board manufacturing process of pouring concrete around the sound-insulating cover). In other words, after the sound-insulating cover is installed in the through hole, the length of the sound-insulating cover will be equal to or shorter than the length of the through hole.

[0117] Whether using sound-insulating covers instead of void pipes or manufacturing PC boards at a PC board manufacturing factory, if the length of the sound-insulating cover is longer than the length of the through-hole, the sound-insulating cover protruding from the through-hole can interfere with pouring concrete after placing the sound-insulating cover over the through-hole or with transporting the PC board from the PC board manufacturing factory. However, if the length of the sound-insulating cover is equal to or shorter than the length of the through-hole, these problems can be avoided. Here, if the length of the sound-insulating cover is longer than the length of the through-hole, a portion of the sound-insulating cover (at least the protruding portion) can be cut to match the length. If the length of the sound-insulating cover is shorter than the length of the through-hole, an additional sleeve material can be used to adjust the length of the sound-insulating cover and the additional sleeve material to match the length of the through-hole. More specifically, if the length of the sound-insulating cover is longer than the thickness of the slab, for example, the protruding portion below the slab is cut off before inserting the drainage pipe fittings (other than the sound-insulating cover) into the sound-insulating cover, leaving the vibration-damping rubber of the drainage pipe fittings below the slab exposed. Incidentally, after the sound-insulating cover is installed in the through-hole, the length of the sound-insulating cover being equal to or less than the length of the through-hole is also suitably applied to the second embodiment described later. As described above, according to the construction method of the first embodiment, a drainage piping component (here, drainage piping fitting 101) capable of exhibiting optimal sound insulation performance, etc., can be constructed with good workability into a through hole that penetrates a section of a building (here, floor slab S).

[0118] [Installation method according to the second embodiment: Elastic material (rubber packing) on ​​the drainage pipe joint side] 7 and 8, a construction method according to a second embodiment of the present invention and the second The drainage pipe joint 103 to which the construction method according to the second embodiment is suitably applied will be described in detail below (without repeating the explanation common to the first embodiment). Fig. 7 is a cross-sectional view (finished construction drawing) showing a drainage piping structure including the drainage pipe joint 103 after construction by the construction method according to the second embodiment, and Fig. 8 is a diagram for explaining a construction method (construction method according to the second embodiment) for constructing the sound-insulating cover 741 (more precisely, only the sound-insulating cover main body 743) in the drainage pipe joint 103 and the drainage pipe joint 103 in a through-hole opened in the floor slab S of a building which is the construction site of the drainage pipe joint.

[0119] Here, drainage pipe joint 101, to which the installation method according to the first embodiment is suitably applied, and drainage pipe joint 103, to which the installation method according to the second embodiment is suitably applied, differ in that in drainage pipe joint 101, elastic material (rubber packing) 735 is provided on the inner peripheral surface of sound insulating cover body 733 of sound insulating cover 731, whereas in drainage pipe joint 103, elastic material (rubber packing) 745 is provided on the outer peripheral surface of drainage pipe joint 103 (more specifically, water collection chamber lower part 905 of horizontal branch pipe connection part 140) rather than on sound insulating cover body 743 of sound insulating cover 741. The other configurations of drainage pipe joint 103, to which the installation method according to the second embodiment is suitably applied, are the same as those of drainage pipe joint 101, to which the installation method according to the first embodiment described above is suitably applied, and therefore detailed description here will not be repeated. In addition, in the drainage pipe joint 103 to which the construction method of the second embodiment is suitably applied, the ring elastic material (rubber ring) 900 is an optional requirement (the ring elastic material (rubber ring) 900 is basically not required for the drainage pipe joint 103), and therefore is not shown in Figures 7 and 8.

[0120] More specifically, the construction method according to the second embodiment comprises the following three steps: Note that the filling step (1-4) is the same as in the construction method according to the first embodiment described above, and is also an optional requirement in the construction method according to the second embodiment. (2-1: Elastic material setting step) Elastic material (rubber packing) 745 is provided at a predetermined position on the outer surface of drain pipe joint 103 (more precisely, water collection chamber lower part 905 of horizontal branch pipe connecting part 140). In this way, elastic material (rubber packing) 745 is not provided on the inner circumferential surface of sound insulating cover 731 like elastic material (rubber packing) 735 of drain pipe joint 101, but is provided on the outer surface of water collection chamber lower part 905 of horizontal branch pipe connecting part 140 in drain pipe joint 103. Here, the installation method according to the second embodiment is not performed such that elastic material (rubber packing) 735 is provided in a recess on the inner circumferential surface of sound insulating cover main body 733 (so that it is fitted into the recess) as in the installation method according to the first embodiment.

[0121] (2-2: Sound-insulating cover installation step) The outermost sound-insulating cover 741 (more precisely, only the sound-insulating cover body 743 of the sound-insulating cover 741) not provided with the elastic material (rubber packing) 745 is installed in the through-hole. (2-3: Integration step) After the sound-insulating cover 741 (more precisely, only the sound-insulating cover body 743 of the sound-insulating cover 741) is installed in the through-hole, the drainage pipe fitting 103 (other than the sound-insulating cover body 743) is inserted into the installed sound-insulating cover 741 (more precisely, only the sound-insulating cover body 743 of the sound-insulating cover 741), and the sound-insulating cover 741 and the drainage pipe fitting 103 (other than the sound-insulating cover body 743) are integrated via an elastic material (rubber gasket) 745.

[0122] Here, this step of integrating is almost synonymous with performing a waterproofing treatment, as in the first embodiment. More specifically, it refers to a step in which sound-insulating cover body 743 is joined (without using adhesive or the like) to drain pipe joint 103 via elastic material (rubber packing) 745, and construction is performed so that waterproofing performance and vibration-proofing performance are exhibited by this elastic material (rubber packing) 745.

[0123] In addition, this integration step is performed by leaving the sound-insulating cover 741 (more precisely, only the sound-insulating cover main body 743) installed on the floor slab S in the through-hole, and The step of (a) integrating the drain pipe joint 103 so that it can be removed from the through-hole is also preferable from the viewpoint of updating the drain pipe joint (updating everything except the sound-insulating cover main body 743). That is, the construction method according to the second embodiment is suitably applied to the drainage pipe fitting 103, and as shown in Figure 8, after the sound-insulating cover 741 (more precisely, only the sound-insulating cover main body 743) is installed in the through-hole of the floor slab S, the drainage pipe fitting 103 (more precisely, other than the sound-insulating cover main body 743) is inserted into the sound-insulating cover 741 (more precisely, only the sound-insulating cover main body 743) installed in the through-hole to be integrated.

[0124] Thus, according to the installation method of the second embodiment, the elastic material (rubber gasket) 745 is provided on the outer surface of the drainage pipe fitting 103 (more precisely, the lower part of the water collection chamber 905 of the horizontal branch pipe connection portion 140) rather than on the inner surface of the sound-insulating cover main body 743, and the sound-insulating cover 741 (more precisely, only the sound-insulating cover main body 743) without the elastic material (rubber gasket) 745 is first installed in the through hole of the floor slab S (and, optionally, after filling material M is filled between the outer surface of the sound-insulating cover 741 and the inner surface of the through hole), and then the drainage pipe fitting 103 (more precisely, other than the sound-insulating cover main body 743) is inserted from above the sound-insulating cover 741 and integrated, thereby allowing the drainage pipe fitting 103 to be installed in the through hole.

[0125] Furthermore, when carrying out construction in this manner, it is preferable that when updating the drainage pipe fittings, the sound-insulating cover 741 (more precisely, only the sound-insulating cover main body 743) can be left in the through hole in the floor slab S, allowing everything other than the sound-insulating cover 741 (more precisely, everything other than the sound-insulating cover main body 743) to be updated. As described above, according to the construction method of the second embodiment, a drainage piping component (here, drainage piping fitting 103) capable of exhibiting optimal sound insulation performance, etc., can be constructed with good workability into a through hole that penetrates a section of a building (here, floor slab S).

[0126] [Modification of the drainage pipe joint 101] Below, a drain pipe joint 105 (and its installation method), which is a modification of the drain pipe joint 101 in the first embodiment described above and in which a thermally expandable fire-resistant sheet 712 is provided on the sound-insulating cover 731 side, will be described, mainly focusing on the differences between the drain pipe joint 105 and the drain pipe joint 101, with reference to Figure 9, which corresponds to Figure 5, and Figure 10, which corresponds to Figure 6. Note that the same structures as those of the drain pipe joint 101 other than the differences are denoted by the same reference numerals in the drain pipe joint 105. Since the explanation of these structures overlaps with the explanation above, they will not be repeated here. In particular, there are no major differences in the installation method (except for the fact that the thermally expandable fire-resistant sheet 712 provided on the sound-insulating cover 731 side is smoothly installed by being flush with the surface (inner peripheral surface) of the sound-insulating cover 731 side so as not to get caught during installation).

[0127] As described above, this drain pipe joint 105 is formed from one or more (here, seven, as an example) resin injection-molded products, like the drain pipe joint 100 shown in Fig. 4(A), the drain pipe joint 101 shown in Fig. 5, and the drain pipe joint 103 shown in Fig. 7. As described above, a heat-expandable fire-resistant material (heat-expandable fire-resistant sheet 712) is provided between the sound-insulating cover 731 and the drain pipe joint 101 (more specifically, the pipe body 110). As shown in Figs. 9 and 10, although not limited thereto, a vibration-damping material 714 is provided between the heat-expandable fire-resistant material (heat-expandable fire-resistant sheet 712) and the pipe body 110.

[0128] Here, the heat-expandable fire-resistant sheet 712 is provided at a predetermined outer peripheral position (FIGS. 6 and 8) on the pipe body 110 (side) of the drain pipe joint 101 (and drain pipe joint 103), or at a predetermined inner peripheral position (FIG. 10) on the sound-insulating cover 731 (side) of the drain pipe joint 105. That is, for the drain pipe joint 101 (and drain pipe joint 103) in which the heat-expandable fire-resistant sheet 712 is provided at a predetermined outer peripheral position on the pipe body 110 (side), The drainage pipe joint 105 differs in that a heat-expandable fireproof sheet 712 is provided at a predetermined inner peripheral position on the sound insulating cover 731 (side).

[0129] As shown in Figure 10, in this drain pipe fitting 105, a vibration insulator 720 is provided between the sound-insulating cover 731 and the drain pipe fitting 101 (more specifically, the pipe body 110), and before the sound-insulating cover 731 is integrated into the drain pipe fitting 101, the vibration insulator 720 is provided on the sound-insulating cover 731 (side), and the heat-expandable fire-resistant sheet 712 is provided at a predetermined inner peripheral position on the sound-insulating cover 731 (side) so that it sinks into the vibration insulator 720, is embedded in the vibration insulator 720, or has approximately the same surface height in the inner peripheral direction as the vibration insulator 720. In this way, by arranging the heat-expandable fire-resistant sheet 712 so that it sinks into the vibration insulator 720, so that it is embedded in the vibration insulator 720, or so that its surface height in the inner circumferential direction is approximately the same (flush, flush) as the vibration insulator 720, if the heat-expandable fire-resistant sheet 712 is not sunk in, the heat-expandable fire-resistant sheet 712 will protrude inward (towards the inner circumferential side) of the vibration insulator 720, and during installation as shown in Figure 10, the heat-expandable fire-resistant sheet 712 (protruding towards the inner circumferential side from the vibration insulator 720) may get caught and get in the way, which may reduce installation efficiency. For this reason, the heat-expandable fire-resistant sheet 712 provided on the sound-insulating cover 731 side is made flush with the surface (inner peripheral surface) of the sound-insulating cover 731 side so as not to get caught during installation (this flushness means that the heat-expandable fire-resistant sheet 712 does not protrude from at least the vibration insulator 720, and it is also acceptable for the heat-expandable fire-resistant sheet 712 to be recessed into the vibration insulator 720), allowing for smooth installation.

[0130] Here, the sound-insulating cover 731 is configured so that its length can be adjusted according to the thickness of the floor slab S. In this case, this length adjustment is achieved by at least one of cutting, dividing, and replacing parts of the sound-insulating cover 731 (two or more of cutting, dividing, and replacing parts may be combined as appropriate). Dividing refers to removing some parts of the sound-insulating cover 731, which is configured by dividing it into two or more parts in the vertical direction, and replacing refers to replacing some or all of the parts with parts of a different length.

[0131] The drainage pipe joint 105 according to this modified example, including the drainage pipe joint 101 and the drainage pipe joint 103 described above, is installed in a through-hole that penetrates the floor slab S of the lowest floor of a building. That is, the floor slab S shown in Figures 5 to 10 is the floor slab of the lowest floor. The drainage pipe joint 105 having such features is installed in a through-hole that penetrates the floor slab S of a building by the installation method described in the first embodiment. Since the subject of the present invention is not only the installation method for drainage piping components but also the drainage piping components themselves, the drainage piping fitting 105 of this modified example is also the drainage piping component itself that is the subject of the present invention, and will be described below.

[0132] As shown in Figures 9 and 10, this drainage pipe joint 105 is installed in a through-hole that penetrates a section of a building (a floor slab S, particularly the floor slab S of the lowest floor). This drainage pipe joint 105 has a hard sound-insulating cover 731 provided on at least a portion of the outer periphery of the portion that passes through the through-hole, and an elastic material (rubber packing) 735 provided between the sound-insulating cover 731 and the outer surface of the drainage pipe joint 101, with the sound-insulating cover 731 being integrated with the drainage pipe joint 101 via the elastic material (rubber packing) 735. As described above, the drainage pipe joint 101 is formed from one or more injection-molded resin products. A vibration insulator 720 is provided between the sound-insulating cover 731 and the drainage pipe joint 101 (more specifically, the pipe body 110), and the vibration insulator 720 is provided on the sound-insulating cover 731 side before the sound-insulating cover 731 is integrated with the drainage pipe joint 101 via the elastic material (rubber packing) 735. The characteristic feature of the structure of the drainage pipe joint 105 itself is that the thermally expandable fireproof sheet 712 is configured to be embedded in the vibration insulator 720, or to be in contact with the vibration insulator 720 and the inner periphery. The heat-expandable fire-resistant sheet 712 is provided at a predetermined inner peripheral position on the sound-insulating cover 731 (side) so that the surface heights in both directions are approximately the same. As described above, this structure allows the heat-expandable fire-resistant sheet 712 provided on the sound-insulating cover 731 side to be flush with the surface (inner peripheral surface) on the sound-insulating cover 731 side so that it does not get caught during installation, and allows for smooth installation.

[0133] As described above, according to the construction method of the drainage pipe fitting 105 and the drainage pipe fitting 105 relating to the modified example, a drainage pipe component (here, the drainage pipe fitting 105) capable of exhibiting optimal sound insulation performance, etc., can be constructed with good workability into a through hole penetrating a section of a building (here, the floor slab S), and the drainage pipe fitting 105 itself can be provided. 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. [Industrial Applicability]

[0134] The present invention is preferred for a construction method and drainage piping component for a drainage piping component that is installed by penetrating the floor slab S of a building, and is particularly preferred for a construction method and drainage piping component for a drainage piping component that is installed by penetrating the floor slab S of a building, in that it exhibits optimal vibration control performance, vibration insulation performance, and sound insulation performance, as well as having suitable water-stopping properties for exhibiting these performances. [Explanation of symbols]

[0135] 100 Drainage pipe fittings 110 Tube body 112 hollow 114 Swirl blade 120 Upper riser connection 130 Drain pipe connection 140 Horizontal branch pipe connection 142 Water Collection Chamber 144, 146, 148 Horizontal branch pipe connecting member 520 (upper floor side) drainage standpipe 530 (lower floor side) drainage standpipe 612 Thermal expandable fireproofing materials 700 outer layer material 710 innermost layer 712 Thermally Expandable Fireproof Sheet 714 Damping material 720 Vibration insulator (made of fire-resistant inorganic fiber) 730 Soundproof Cover

Claims

1. A construction method for installing drainage piping components in through-holes that penetrate the compartments of a building, The drainage piping member is constructed such that a sound-insulating cover is provided on at least a portion of the outer surface of the part that passes through the through hole, and an elastic material is provided between the sound-insulating cover and the outer surface of the drainage piping member. The steps include providing the elastic material at a predetermined position on the inner circumferential surface of the sound insulation cover, The steps include installing the sound-insulating cover, after providing the elastic material, into the through-hole, The steps include: installing the sound-insulating cover in the through-hole, inserting the drainage piping member into the installed sound-insulating cover, and integrating the sound-insulating cover and the drainage piping member via the elastic material; A method for installing drainage piping components, wherein the sound-insulating cover is made of rubber or resin.

2. A construction method for installing drainage piping components in through-holes that penetrate the compartments of a building, The drainage piping member is constructed such that a sound-insulating cover is provided on at least a portion of the outer surface of the part that passes through the through hole, and an elastic material is provided between the sound-insulating cover and the outer surface of the drainage piping member. The steps include: providing the elastic material at a predetermined position on the outer surface of the drainage piping member; The steps include installing the sound-insulating cover into the through-hole, The step includes, after the sound insulation cover is installed in the through hole, inserting the drainage piping member equipped with the elastic material into the installed sound insulation cover, thereby integrating the sound insulation cover and the drainage piping member via the elastic material, A method for installing drainage piping components, wherein the sound-insulating cover is made of rubber or resin.

3. The construction method according to claim 1 or 2, further comprising the step of filling the space between the outer surface of the sound insulation cover and the inner surface of the through hole after the sound insulation cover has been installed in the through hole and before the sound insulation cover and the drainage piping member have been integrated.

4. The step of integrating the sound-insulating cover and the drainage piping member is, The sound-insulating cover installed in the aforementioned section is left in the through-hole together with the elastic material, so that the drainage piping member can be detached from the through-hole. or The sound-insulating cover installed in the aforementioned section is left in the through-hole, and the drainage piping member, together with the elastic material, is made detachable from the through-hole. A construction method according to any one of claims 1 to 3, which involves integrating the components.

5. The construction method according to any one of claims 1 to 4, wherein the sound insulation cover is made of resin.

6. A construction method for installing drainage piping components in through-holes that penetrate the compartments of a building, The drainage piping member is constructed such that a sound-insulating cover is provided on at least a portion of the outer surface of the part that passes through the through hole, and an elastic material is provided between the sound-insulating cover and the outer surface of the drainage piping member. The aforementioned construction method is A construction method comprising the steps of: providing the elastic material at a predetermined position on the inner circumferential surface of the sound insulation cover; installing the sound insulation cover with the elastic material in place in the through-hole; and, after the sound insulation cover has been installed in the through-hole, inserting the drainage piping member into the installed sound insulation cover to integrate the sound insulation cover and the drainage piping member via the elastic material. or A construction method comprising the steps of: providing the elastic material at a predetermined position on the outer surface of the drainage piping member; installing the sound insulation cover in the through hole; and, after the sound insulation cover has been installed in the through hole, inserting the drainage piping member equipped with the elastic material into the installed sound insulation cover, thereby integrating the sound insulation cover and the drainage piping member via the elastic material, A method for installing drainage piping members, wherein the sound-insulating cover abuts the outer surface of the drainage piping member via a ring-shaped, elastic ring elastic material corresponding to the outer diameter of the drainage piping member.

7. A construction method for installing drainage piping components in through-holes that penetrate the compartments of a building, The drainage piping member is constructed such that a sound-insulating cover is provided on at least a portion of the outer surface of the part that passes through the through hole, and an elastic material is provided between the sound-insulating cover and the outer surface of the drainage piping member. The steps include providing the elastic material at a predetermined position on the inner circumferential surface of the sound insulation cover, The steps include installing the sound-insulating cover, after providing the elastic material, into the through-hole, The steps include: installing the sound-insulating cover in the through-hole, inserting the drainage piping member into the installed sound-insulating cover, and integrating the sound-insulating cover and the drainage piping member via the elastic material; A method for constructing a drainage piping member, wherein the step of providing the elastic material to the sound insulation cover is to provide the elastic material in a recess on the inner circumferential surface of the sound insulation cover.

8. The construction method according to any one of claims 1 to 7, wherein a vibration insulator is provided between the sound insulation cover and the drainage piping member, in at least a portion of the portion that passes through the through hole.

9. The construction method according to claim 8, wherein the vibration insulator is fixed to the sound insulation cover on the outer layer side.

10. A construction method for installing drainage piping components in through-holes that penetrate the compartments of a building, The drainage piping member is constructed such that a sound-insulating cover is provided on at least a portion of the outer surface of the part that passes through the through hole, and an elastic material is provided between the sound-insulating cover and the outer surface of the drainage piping member. The aforementioned construction method is A construction method comprising the steps of: providing the elastic material at a predetermined position on the inner circumferential surface of the sound insulation cover; installing the sound insulation cover with the elastic material in place in the through-hole; and, after the sound insulation cover has been installed in the through-hole, inserting the drainage piping member into the installed sound insulation cover to integrate the sound insulation cover and the drainage piping member via the elastic material. or A construction method comprising the steps of: providing the elastic material at a predetermined position on the outer surface of the drainage piping member; installing the sound insulation cover in the through hole; and, after the sound insulation cover has been installed in the through hole, inserting the drainage piping member equipped with the elastic material into the installed sound insulation cover, thereby integrating the sound insulation cover and the drainage piping member via the elastic material, A method for installing a drainage piping member, wherein, after installing the sound-insulating cover in the through-hole, the length of the sound-insulating cover is less than or equal to the length of the through-hole.

11. The drainage piping member is formed from one or more injection-molded resin products, The construction method according to any one of claims 1 to 10, wherein a heat-expandable fire-resistant material is provided between the sound-insulating cover and the drainage piping member.

12. The construction method according to claim 11, wherein the heat-expandable fire-resistant material is provided at a predetermined outer circumference position in the drainage piping member or at a predetermined inner circumference position in the sound insulation cover.

13. A vibration insulator is provided between the sound insulation cover and the drainage piping member, and before integration, the vibration insulator is provided on the sound insulation cover side. The construction method according to claim 12, wherein the heat-expandable fire-resistant material is provided at a predetermined inner circumference position in the sound insulation cover so as to be embedded in the vibration insulator.

14. A vibration insulator is provided between the sound insulation cover and the drainage piping member, and before integration, the vibration insulator is provided on the sound insulation cover side. The construction method according to claim 12, wherein the heat-expandable fire-resistant material is provided at a predetermined inner circumference position in the sound insulation cover so as to be embedded in the vibration insulator.

15. A construction method for installing drainage piping components in through-holes that penetrate the compartments of a building, The drainage piping member is constructed such that a sound-insulating cover is provided on at least a portion of the outer surface of the part that passes through the through hole, and an elastic material is provided between the sound-insulating cover and the outer surface of the drainage piping member. The aforementioned construction method is A construction method comprising the steps of: providing the elastic material at a predetermined position on the inner circumferential surface of the sound insulation cover; installing the sound insulation cover with the elastic material in place in the through-hole; and, after the sound insulation cover has been installed in the through-hole, inserting the drainage piping member into the installed sound insulation cover to integrate the sound insulation cover and the drainage piping member via the elastic material. or A construction method comprising the steps of: providing the elastic material at a predetermined position on the outer surface of the drainage piping member; installing the sound insulation cover in the through hole; and, after the sound insulation cover has been installed in the through hole, inserting the drainage piping member equipped with the elastic material into the installed sound insulation cover, thereby integrating the sound insulation cover and the drainage piping member via the elastic material, The drainage piping member is formed from one or more injection-molded resin products, A heat-expandable fire-resistant material is provided between the sound-insulating cover and the drainage piping member. The heat-expandable fire-resistant material is provided at a predetermined outer circumferential position in the drainage piping member, or at a predetermined inner circumferential position in the sound insulation cover. A vibration insulator is provided between the sound insulation cover and the drainage piping member, and before integration, the vibration insulator is provided on the sound insulation cover side. A method for constructing a drainage piping member, wherein the heat-expandable fire-resistant material is provided at a predetermined inner circumferential position in the sound insulation cover such that its surface height in the inner circumferential direction is substantially the same as that of the vibration insulator.

16. The construction method according to any one of claims 1 to 15, wherein the sound insulation cover is configured to be adjustable in length according to the thickness of the compartment.

17. The construction method according to claim 16, wherein the length adjustment is performed by cutting, dividing, and replacing parts of the sound insulation cover.

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