Drainage pipe joint updating method and drainage pipe structure

Abstract

To provide drainage pipe joints with optimal vibration damping performance, vibration isolation performance, and sound insulation performance, as well as suitable water tightness.SOLUTION: A drainage pipe joint 100 comprises a pipe main body 110 that is placed in a through hole of a floor slab S when installed in a building, an upper riser pipe connection part 120 that connects a drainage riser pipe 520 that protrudes above the floor slab S and allows drainage water to flow in from the upper floor, a drainage pipe connection part 130 that connects a drainage riser pipe 530 that protrudes below the floor slab S and allows drainage water to flow out to the lower floor, and a horizontal branch pipe connection part 140 that connects a drainage horizontal branch pipe 510 above the floor slab S. An outer layer member 700 is provided so as to be wound around the outer periphery of the pipe main body 110, and the outer layer member 700 has a three-layer structure consisting of, from the inner layer, a vibration damping material 714, a vibration insulator 720, and a sound insulation cover 730, and the sound insulation cover 730 covers the entire length of the vibration insulator 720 in the vertical direction.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a drainage pipe joint that is installed by penetrating the floor slab of a building, and in particular to a drainage pipe joint that exhibits optimal vibration control performance, vibration insulation performance, and sound insulation performance, as well as suitable water stoppage properties for exhibiting these performances. [Background technology]

[0002] Water supply and drainage facilities are installed in apartment buildings, office buildings, etc. The most widely known drainage system is a drainage piping structure that includes vertical pipes that run vertically through each floor of the building, horizontal pipes installed within each floor, and drainage piping joints that connect these. When installed in a building, this type of drainage piping joint comprises a pipe body that is placed in the through hole of the floor slab, an upper riser connection portion that protrudes above the floor slab and connects a drainage riser pipe that allows drainage water to flow in from the upper floor, a lower riser connection portion that protrudes below the floor slab and connects a drainage riser pipe that allows drainage water to flow down to the lower floor, and a horizontal branch pipe connection portion that connects a drainage horizontal branch pipe above the floor slab.

[0003] For drain pipes, including these drain pipe joints, that are installed through the floor slab, various measures have been proposed to prevent so-called structure-borne noise, in which drain vibrations are transmitted to the floor slab and radiated into the room. However, these measures to prevent structure-borne noise have the problem that they cannot prevent water leakage around the drain pipes that penetrates the floor slab in the thickness direction.

[0004] As a technology for solving such problems and preventing structure-borne sound, Japanese Patent Publication No. 3923745 (Patent Document 1) discloses a sound-absorbing drain pipe that is characterized by having a pipe body (5) that is installed by penetrating a through hole (3) provided in a floor slab (2), a vibration insulator (6) that is fitted onto the outer circumferential surface (5a) of the portion of the pipe body (5) that passes through the through hole (3) and directly or indirectly fills the space between the pipe body and the inner circumferential surface of the through hole (3), and a waterproof ring (7) that completely covers the upper annular surface of the vibration insulator (6) to a level that it is immersed in the through hole (3). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 3923745 Summary of the Invention [Problem to be solved by the invention]

[0006] In the sound-absorbing drain pipe disclosed in the above-mentioned Patent Document 1, a fire-resistant vibration insulator (RW) is wrapped around the outer periphery of the drain pipe at a position approximately equal to the slab position in the vertical direction, and a rubber vibration-damping ring with a short vertical length is installed on the upper annular surface of the RW within the slab so as to cover the vibration insulator. However, in the structure disclosed in Patent Document 1, the vibration insulator and the vibration-damping ring are joined with adhesive tape or the like, but this may not completely eliminate the possibility of wastewater entering the vibration insulator.

[0007] The present invention was developed in consideration of the above-mentioned problems, and its purpose is to provide a drainage pipe joint which exhibits optimal vibration control performance, vibration insulation performance, and sound insulation performance, as well as having suitable water-stopping properties to exhibit these performances. [Means for solving the problem]

[0008] In order to achieve the above object, the drainage pipe joint according to the present invention employs the following technical measures. In other words, the drainage pipe joint of the present invention is a drainage pipe joint that, when installed in a building, comprises a pipe main body that is placed in a through hole in a floor slab, an upper riser pipe connection portion that protrudes above the floor slab and connects a drainage riser pipe to allow drainage water to flow in from the upper floor, a drainage pipe connection portion that protrudes below the floor slab and connects a drainage pipe to allow drainage water to flow out to the lower floor, and a horizontal branch pipe connection portion that connects a horizontal drainage branch pipe above the floor slab, and is characterized in that it includes a vibration insulator provided on at least a part of the outer periphery of at least the portion of the pipe main body that passes through the through hole, and a sound-insulating cover provided on the outer periphery of the vibration insulator over the entire vertical length of the vibration insulator.

[0009] Preferably, the sound-insulating cover can be configured to have a water-stopping effect, a sound-insulating effect and a vibration-insulating effect. More preferably, the sound insulation cover has an upper end water stop part at an upper end and / or a lower end water stop part at a lower end, and the upper end water stop part and / or the lower end water stop part can be configured to abut against the outer surface of the drain pipe joint. Here, abutting includes a case where the sound insulation cover is abutted by being joined with an adhesive or the like.

[0010] More preferably, the upper end water stopping portion and the lower end water stopping portion may be configured to be formed by a thick portion that is thicker than the main body of the sound insulating cover. More preferably, the sound-proofing cover is integrally molded with a cover body having a length corresponding to the entire vertical length of the vibration insulator, including the upper end water-stopping portion and / or the lower end water-stopping portion, and the sound-proofing cover itself can be configured to be elastic.

[0011] More preferably, the sound-insulating cover can be configured to be provided by utilizing the elasticity of the sound-insulating cover itself. More preferably, the vibration insulator can be configured to be fixed to the sound-insulating cover on the outer layer side. More preferably, the pipe body at least comprises a straight pipe section and a reduced diameter section below the straight pipe section, and the vibration insulator can be configured to be intermittently fixed in the circumferential direction of the sound-proof cover in a height range corresponding to the straight pipe section.

[0012] More preferably, the vibration insulator can be configured to be fixed by point attachment at two to four locations in the circumferential direction of the sound insulation cover on the outer layer side. More preferably, the drain pipe fitting can be formed from one or more resin injection-molded products, and configured so that a heat-expandable fire-resistant material is provided on the inner layer side of the vibration insulator, and the vibration insulator is fixed to the sound-insulating cover on the outer layer side at a position above the heat-expandable fire-resistant material.

[0013] More preferably, the pipe body may be configured to further include a vibration-damping material provided integrally with at least a portion of the outer peripheral surface of at least the portion passing through the through hole, on the inner layer side of the vibration insulator. More preferably, the drain pipe joint is formed from one or more resin injection-molded products, the pipe body has at least a straight pipe section and a reduced diameter section below the straight pipe section, and a heat-expandable fire-resistant material is provided on the inner layer side of the vibration insulator in place of part of the vibration-damping material, and the vibration insulator is fixed to the sound-insulating cover on the outer layer side at a position above the heat-expandable fire-resistant material and at a height position corresponding to the straight pipe section.

[0014] More preferably, the sound insulation cover includes a cover body having no elasticity and a length corresponding to the entire length of the vibration insulator in the vertical direction, and the cover body and the drain pipe joint are connected to each other. It may be configured with elastic material only at the upper end or at both the upper end and the lower end between the surface. More preferably, the elastic material may be provided on an inner peripheral surface of the cover body or an outer surface of the drain pipe joint.

[0015] More preferably, the cover body can be made of a hard resin. More preferably, the sound-proof cover can be configured to abut against the outer surface of the drainage pipe joint via a ring-shaped, elastic ring elastic material that corresponds to the outer diameter of the drainage pipe joint.

[0016] More preferably, the vibration insulator can be configured to be fixed to the sound-insulating cover on the outer layer side by continuously or intermittently fixing one circumference of the vibration insulator at least at one location in the height direction of the sound-insulating cover on the outer layer side. Effect of the Invention

[0017] According to the present invention, it is possible to provide a drainage pipe joint that is installed by penetrating the floor slab of a building, which exhibits optimal vibration control performance, vibration insulation performance, and sound insulation performance, and also has suitable water-stopping properties for exhibiting these performances. [Brief description of the drawings]

[0018] [Figure 1] 1A and 1B are a top view and a side view, respectively, showing a drainage piping structure in which a drainage pipe joint 100 according to a first embodiment of the present invention is adopted. [Diagram 2] 2A and 2B are perspective views showing the drainage piping structure of FIG. 1, in which (A) is an oblique view showing the state after an outer layer member 700 is provided on the drainage pipe joint 100, and (B) is an oblique view showing the state before the outer layer member 700 is provided on the drainage pipe joint 100. [Diagram 3] 1A and 1B are perspective views showing a drainage pipe fitting 100, in which (A) is a perspective 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 a perspective view showing the state before the heat-expandable fire-resistant material 612 and the heat-expandable fire-resistant sheet 712 have been installed. [Figure 4] FIG. 4A is an exploded view of the drainage pipe joint 100 shown in FIG. 3B, and FIG. 4B is a perspective view of the pipe body 110 seen through the pipe wall. [Diagram 5]5 is a cross-sectional view taken along line 5-5 of FIG. 1, showing a drainage piping structure in which the drainage piping joint 100 is used. [Figure 6] FIG. 6 is a partially enlarged cross-sectional view of FIG. 5 (without the recessed cross-section). [Figure 7] FIG. 6 is a partially enlarged cross-sectional view of FIG. 5 (including a recessed cross-section). [Figure 8] FIG. 6(A) is a development view of rock wool, which is an example of a vibration insulator 720 (formed from fire-resistant inorganic fibers) that forms the three-layered outer layer member 700 shown in FIG. 5 , and FIG. 6(B) is a development view of rock wool, which is an example of a vibration insulator 726, which is a comparative example. [Figure 9] 1A and 1B are a top view and a side view, respectively, showing a drainage piping structure in which a drainage pipe joint 200 according to a second embodiment of the present invention is adopted. [Figure 10] 10A and 10B are diagrams showing the drainage piping structure of FIG. 9, in which (A) is an oblique view showing the state after an outer layer member 800 is provided on the drainage pipe joint 200, and (B) is an oblique view showing the state before the outer layer member 800 is provided on the drainage pipe joint 200. [Figure 11] 1A is a perspective view showing a drainage pipe fitting 200 after a heat-expandable fire-resistant material 612 and a heat-expandable fire-resistant sheet 712 have been installed, and FIG. 1B is a perspective view showing a state before the heat-expandable fire-resistant material 612 and the heat-expandable fire-resistant sheet 712 have been installed. [Figure 12] (A) An exploded view of the drainage pipe fitting 200 shown in Figure 11 (B), (B) a cross-sectional view of the pipe body 210, and (C) a cross-sectional view of the pipe body 210 to explain the recess 212 filled with thermally expandable fire-resistant material 612. [Figure 13] 13 is a cross-sectional view taken along line 13-13 of FIG. 1, showing a drainage piping structure in which the drainage piping joint 200 is used. [Figure 14] FIG. 14 is a partially enlarged cross-sectional view of FIG. 13. [Figure 15] 3A to 3E are diagrams for explaining the arrangement of a thermally expandable fireproof material. [Figure 16] FIG. 1 is a cross-sectional view showing a drainage piping structure in which a drainage pipe joint 101 according to a first modified example of the present invention is adopted. [Figure 17] FIG. 17 is a diagram for explaining a state in which a sound-insulating cover is set on a pipe body in the drainage pipe joint 101 of FIG. 16. [Figure 18] FIG. 11 is a cross-sectional view showing a drainage piping structure in which a drainage pipe joint 101 according to a second modified example of the present invention is adopted. [Figure 19] 19 is a diagram for explaining a state in which a sound-insulating cover is set on a pipe body in the drainage pipe joint 103 of FIG. 18. FIG. [Figure 20] FIG. 17 is a diagram for explaining a construction method for setting a pipe body in a sound-insulating cover embedded in a slab in the drainage pipe joint 101 of FIG. 16. [Figure 21] FIG. 20 is a diagram for explaining a construction method for setting a pipe body in a sound-insulating cover embedded in a slab in the drainage pipe joint 103 in FIG. 18. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, the drain pipe joint 100 according to the first embodiment of the present invention will be described in detail with reference to Figs. 1 to 8, and the drain pipe joint 200 according to the second embodiment of the present invention will be described in detail with reference to Figs. 9 to 15, including the construction method. Here, the perspective views shown in Figs. 2 to 4 and Figs. 10 to 12 are schematic views, and may not be completely consistent with other views (e.g., Figs. 5 and 13) (e.g., the presence or absence of a drain pipe connected to the drain pipe joint 100 or the drain pipe joint 200, the presence or absence of a vibration-damping material 714 provided at the other than the receptacle portion of the upper riser pipe connection portion 120 and the other than the receptacle portion of the horizontal branch pipe connection portion 140, and the shape of the swirl vane 114). In addition, 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 each other.

[0020] <Summary> As shown in Figures 1 and 5, as well as Figures 9 and 13, a drainage piping structure using a drainage pipe fitting 100 or a drainage pipe fitting 200 according to an embodiment of the present invention includes a drainage pipe fitting 100 or a drainage pipe fitting 200 provided in a through hole that vertically penetrates a floor slab S in a building, an upper floor side drainage riser pipe 520 connected to these drainage pipe fittings 100 or drainage pipe fittings 200 above the floor slab S and allowing drainage water to flow in from the upper floor, (here, three) drainage horizontal branch pipes 510 connected to these drainage pipe fittings 100 or drainage pipe fittings 200 above the floor slab S, and a lower floor side drainage riser pipe 530 or a 90-degree bent pipe 540 connected to these drainage pipe fittings 100 or drainage pipe fittings 200 below the floor slab S and allowing drainage water to flow out to the lower floor. The drainage piping structure using the drainage pipe joint 100 is used on floors other than the lowest floor, and the drainage piping structure using the drainage pipe joint 200 is used on the lowest floor, but these drainage piping structures have the same structure above the floor slab S. Note that these drainage piping structures are merely examples, and the use of the drainage pipe joint according to the present invention is not limited to the drainage piping structures shown as examples.

[0021] Here, the drain pipe joint 100 or drain pipe joint 200 used in these drain pipe structures and the drain pipes connected to these drain pipe joints 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 be made of materials other than resin, such as cast iron, without being limited to resin. For this reason, in the following, the drain pipe joint 100, drain pipe joint 200, and the drain pipes connected to these drain pipe joints will be described as being made of non-fire-resistant resin, and will not be limited to resin. In cases where no specific fire resistance is specified, it will be described in the explanation as necessary. Here, "non-fire resistant" refers to a property that can be deformed, melted, or burned by heat when a fire occurs in a building, and for example, resin-made products fall under this category. In addition, when resin-made products are adopted, the drainage pipe joint 100, drainage pipe joint 200, and the pipes connected thereto (drainage horizontal branch pipe 510, upper floor drainage riser 520, lower floor drainage riser 530, 90-degree vent pipe 540) are formed from, for example, polyvinyl chloride, polyethylene, polybutene, polypropylene, nylon, or the like. For the drainage riser, for example, a so-called fire-resistant two-layer pipe may be used.

[0022] The drainage pipe joint 100 is formed of one or more (seven in this example) resin injection moldings as shown in Figures 4(A) and 5, and the drainage pipe joint 200 is formed of one or more (seven in this example) resin injection moldings as shown in Figures 12(A) and 13. The drainage pipe joint 100 includes a pipe body 110 that is placed in the through hole of the floor slab S when installed in a building, an upper riser pipe connection part 120 that connects a drainage riser pipe 520 that protrudes above the floor slab S and allows drainage 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, the drainage riser pipe 530) that flows out drainage to the lower floor, and a horizontal branch pipe connection part 140 that connects a drainage horizontal branch pipe 510 above the floor slab S, as shown in Figures 1, 4(A) and 5. 9, 12(A) and 13, the drainage pipe joint 200 includes a pipe body 210 that is placed in the through hole of the floor slab S when installed in a building, an upper riser pipe connection part 120 that connects a drainage riser pipe 520 that protrudes above the floor slab S and allows drainage from the upper floor to flow in, a drainage pipe connection part 230 that connects a drainage pipe (here, a 90-degree bent pipe 540 suspended from the lower floor side of the floor slab S by a mounting member T) that protrudes below the floor slab S and allows drainage to flow out to the lower floor, and a horizontal branch pipe connection part 140 that connects a drainage horizontal branch pipe 510 above the floor slab S. Thus, the drainage pipe joint 100 and the drainage pipe joint 200 are different in the pipe body 110 and the pipe body 210, the drainage pipe connection part 130 and the drainage pipe connection part 230, and the outer layer member 700 and the outer layer member 800 (described later). That is, the drain pipe joint 100 and the drain pipe joint 200 have something in common above the floor slab S. The drain pipe joint 100 and the drain pipe joint 200 are given the same reference numerals for these common parts.

[0023] As shown in these figures, the common parts of the drain pipe joint 100 and the drain pipe joint 200 are the side branch pipe connection part 140, which is composed of a water collection chamber 142 with three openings at 90° intervals in a plan view, and a first side branch pipe connection member 144, a second side branch pipe connection member 146, and a third side branch pipe connection member 148 for connecting the drain side branch pipe corresponding to the positions of the openings. Here, although not limited thereto, the first side branch pipe connection member 144, the second side branch pipe connection member 146, and the third side branch pipe connection member 148 all connect the drain side branch pipe 510 without reducing the diameter, but the pipe diameter may be changed.

[0024] The pipe body 110 of the drain pipe joint 100 and the pipe body 210 of the drain pipe joint 200 differ in the following points. The pipe body 210 is shorter in the drainage direction than the pipe body 110, does not have the reduced diameter section 118 (tapered) of the pipe body 110, and does not have the swirl vane 114 as a protrusion protruding from the inner surface of the pipe body 110 between the horizontal branch pipe connection section 140 and the drain pipe connection section 130 of the pipe body 110. Then, 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 thermally expandable fireproof material 612 is filled in the portion of this depression 112 as shown in FIG. 3. On the other hand, the pipe body 210 has a recess 212 in place of the recess 112 of the pipe body 110, and as shown in FIG. 11, the recess 212 is filled with a putty-like thermally expandable fireproof material 612.

[0025] Here, the thermally expandable fire-resistant material 612 filled in the recess 112 or the recess 212 will be described. The thermally expandable fire-resistant material 612 contains, for example, a resin component mainly composed of butyl rubber, a phosphorus compound, neutralized thermally expandable graphite, a water-containing inorganic substance, and a metal carbonate. The thermally expandable fireproof material 612 is formed from a resin composition containing epoxy resin, a phosphorus compound, neutralized thermally expandable graphite, and an inorganic filler, or the like. For example, a product name "Fiblock" manufactured by Sekisui Chemical Co., Ltd. (expands 5 to 40 times at a reaction temperature of 200°C) is used as the thermally expandable fireproof material 612. In addition, a product name "thermally expandable heat-resistant sealant IP" manufactured by Inaba Denki Sangyo Co., Ltd. (expands starting at 120°C, expands to 4 times or more in volume) and a product name "Heatmel" manufactured by Furukawa Techno Material Co., Ltd. (expansion start temperature 120°C, significant expansion temperature 260°C, expands 4 to 8 times) can be used as the thermally expandable fireproof material 612.

[0026] 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 satisfies various conditions such as reaction temperature and pipe diameter required depending on the installation location within the building can be selected and used. This thermally expandable fire-resistant material 612 is formed into a non-hardening, non-drying putty-like material, and is filled into the depression 112 on the outer surface of the pipe body 110 of the drainage pipe fitting 100 or the depression 212 on the outer surface of the pipe body 210 of the drainage pipe fitting 200 so as to fill the depression 112 up to approximately the outer diameter of the pipe body 110 or the pipe body 210 (in an amount sufficient to achieve the desired fire resistance, either together with the thermally expandable fire-resistant sheet 712 described below or without the thermally expandable fire-resistant sheet 712).

[0027] Here, the protrusion of the pipe body 110 is not limited to the swirl vane 114, but may be a deflection plate or the like, as long as it is a part that changes the flow of the drainage in the drainage pipe joint 100, and is not limited to the swirl vane or the deflection plate, as long as the corresponding recess 112 is formed on the outer surface of the pipe body 110. Furthermore, the recess 212 of the pipe body 210 is not limited to the shape shown in the figure. In any of the drainage pipe joints 100 and the drainage pipe joints 200, the thermally expandable fireproof material 612 is filled in the recess on the outer surface of these drainage pipe joints. Note that, as shown in FIG. 12(B), the recess of the pipe body 210 is formed as the diameter of the pipe body 210 is reduced, but since the inner wall of the pipe body 210 expands downstream of the recess, in order to distinguish it from the reduced diameter portion 118 of the pipe body 110, the pipe body 210 will not be described as having a reduced diameter portion (tapered portion).

[0028] Furthermore, a sheet-like heat-expandable fireproof sheet 712 is provided so as to be wrapped around the outer circumferential surface of the pipe body 110, as shown in Figs. 3 and 5, in correspondence with the height position of the pipe body 110 corresponding to the floor slab S, and a sheet-like heat-expandable fireproof sheet 712 is provided so as to be wrapped around the outer circumferential surface of the pipe body 110, as shown in Figs. 11 and 13, in correspondence with the height position of the pipe body 210 corresponding to the floor slab S. The heat-expandable fireproof material 612 and the heat-expandable fireproof sheet 712 are vertically spaced apart in the pipe body 110, whereas in the pipe body 210, they have portions that overlap each other in the radial direction without being vertically spaced apart. The dashed lines in Figs. 3 and 11 indicate removal.

[0029] In a building employing such a drainage piping structure, if the drainage piping joint 100 or the drainage piping joint 200 or the like burns, the heat causes 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 piping joint 100 or the drainage piping joint 200 to crush the hollow portion, thereby blocking the drainage piping joint 100 or the drainage piping joint 200. As a result, a drainage piping structure using the drainage piping joint 100 or the drainage piping joint 200 is capable of blocking the pipeline so that flames, smoke, etc. do not flow in the event of a fire.

[0030] 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, when the heat-expandable fire-resistant sheet 712 of such heat-expandable refractory materials is not provided (in this portion regardless of the reason), it is preferable to provide a vibration-damping material 714 in place of the heat-expandable fire-resistant sheet 712. Referring to Figures 5 to 7 for the drainage pipe fitting 100, and to Figures 13 to 14 for the drainage pipe fitting 200, the outer layer member 700 and the outer layer member 800 which are arranged to be wrapped around the outer periphery of the pipe main body 110 or the outer periphery of the pipe main body 210 and the drainage pipe connection portion 230 will be described.

[0031] As shown in these figures, the outer layer member 700 and the outer layer member 800 have a three-layer structure, and are provided in the following order from the outer surface of the drain pipe joint 100 or the drain pipe joint 200: vibration damping material 714 (or heat-expandable fireproof sheet 712), vibration insulator 720 or vibration insulator 820 made of fire-resistant inorganic fiber, and soundproof cover 730 on the outer surface of the pipe main body 110 or on the outer surface of the pipe main body 210 and the drain pipe connection part 230. The vibration insulator 720 and the vibration insulator 820 have different shapes when deployed, which will be described in detail later. The recess 112 or the recess 212 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 by filling the hollow portion of the recess 112 or the recess 212 with the putty-like heat-expandable fire-resistant material 612.

[0032] In the drain 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 a pressure-sensitive adhesive) so as to cover the thermally expandable fire-resistant material 612 filled in the recess 112. In terms of fire resistance, a thermally expandable fire-resistant sheet 712 is attached to the outer surface of the pipe body 110 instead of the vibration-damping material 714 at a position of the pipe body 110 above the recess 112 filled with the thermally expandable fire-resistant material 612. The thermally expandable fire-resistant sheet 712 attached to the outer surface of the pipe body 110 in this manner also exhibits vibration-damping performance similar to the vibration-damping material 714 (although the performance may not be the same). In the drain pipe joint 200, the vibration-damping material 714 is attached to the outer surface of the drain pipe connection part 230 (for example, with an adhesive or a pressure-sensitive adhesive). Regarding fire resistance, a heat-expandable fire-resistant sheet 712 is attached to the outer surface of the pipe body 210 in place of the vibration-damping material 714 at a position of the pipe body 210 above the drain pipe connection part 230 (and a heat-expandable fire-resistant material 612 is filled in the recess 212 on the radially inner circumferential side). The heat-expandable fire-resistant sheet 712 attached to the outer surface of the pipe body 210 in this manner also exhibits vibration-damping performance similar to the vibration-damping material 714 (although the performance may not be the same).

[0033] Although the details will be described later, the thermal expansion coefficients of the thermally expandable fire-resistant material 612 and the thermally expandable fire-resistant sheet 712 are different. Here, it is generally considered that a thermally expandable fire-resistant material with a high thermal expansion coefficient has low shape retention after expansion, and a thermally expandable fire-resistant material with a low thermal expansion coefficient has high shape retention after expansion. If the thermal expansion coefficient is low, there is a possibility that sufficient fire resistance cannot be exhibited, and if the shape retention is low, there is a possibility that the thermally expandable material will fall. Taking into consideration this trade-off characteristic and the thermal expansion coefficients (and the absolute value of the difference, etc.), the thermally expandable materials contained in the thermally expandable fire-resistant material 612 and the thermally expandable fire-resistant sheet 712 are selected in accordance with the respective positions, weights, shapes, reaction speeds, and expansion start temperatures, etc.

[0034] 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 (butyl rubber, etc.) or asphalt-based (rubber asphalt, modified asphalt, etc.) material, the sound-insulating cover 730 is formed containing a rubber-based (EPDM (ethylene propylene diene rubber) etc.), elastomer-based or olefin-based (polyethylene resin, etc.) material, and the vibration insulators 720 and 820 formed from fire-resistant inorganic fibers consist of an aggregate of fire-resistant inorganic fibers (porous material).

[0035] Here, examples of inorganic fibers include artificial mineral fibers, such as glass wool and rock wool. Rock wool or ceramic fiber, etc., are preferred because they have high vibration insulation performance as well as high sound absorption performance. Vibrations caused by drainage flowing down the pipe body 110 or pipe body 210 and the drain pipe connection part 230 (for example, vibrations generated by hitting the swirl vane 114) are suppressed by the vibration damping material 714, and then the vibration is blocked (and / or noise caused by the vibration is absorbed) by the vibration insulator 720 made of rock wool or the like, and the transmission of noise caused by the vibration is blocked by the sound insulation cover 730 made of a rubber cover made of EPDM or the like. Here, rock wool is a general term for materials manufactured using natural rocks or steel slag such as blast furnace slag as the main raw material, and glass wool is a general term for cotton-like materials made of glass fibers, both of which have fire resistance and flame retardancy.

[0036] In the following, a case may be described in which butyl rubber is used as the vibration damping material 714, rock wool is used as the vibration insulator 720, and an EPDM rubber cover is used as the sound-proof cover 730; however, these materials are merely examples. When this rock wool is used as the vibration insulator 720, it is preferable to use a sheet-shaped rock wool manufactured by papermaking. However, it is difficult to process the rock wool sheet manufactured by papermaking in this way into the three-dimensional shape (straight pipe section + reduced diameter section (tapered section)) of the pipe body 110 in the drainage pipe joint 100 by sewing or the like, and even if a planar rock wool sheet (hereinafter may be simply referred to as rock wool, but in this case, the vibration insulator 720 in the present invention is preferably in the form of a sheet) without sewing or the like is set on the pipe body 110 by, for example, attaching it with tape, it may fall off in the event of a fire. For this reason, the developed shape (planar shape) of the rock wool sheet is, for example, as shown in FIG. 8(A).

[0037] In this way, even if the floor slab S is thin, the slit can be made to appear only in one place in the vertical direction (up and down direction in the pipe body 110). Furthermore, in the development of the rock wool sheet shown in FIG. 8(B), the slit is made to appear only in one place in the vertical direction, but in order to accommodate the three-dimensional shape of the pipe body 110 (straight pipe section + reduced diameter section (tapered section)), in FIG. 8(A) the slit (more specifically, the narrow groove 722 described later, with five slits) is made at the position of the floor slab S in the rock wool sheet, whereas in FIG. 8(B) the rectangle and the partial ring shape are joined by an arc. In the case of the development shown in FIG. 8(A), the slit is at the position of the floor slab S, so even if there is a slit in this part (this part may be mechanically weak or have poor fire resistance), the position is the position of the floor slab S, and the floor slab S does not burn, so there is no problem with the fire resistance of the rock wool and it will not fall in the event of a fire. On the other hand, in the development of the rock wool sheet shown in FIG. 8(B), when the joint shown by the dotted line is not at the position of the floor slab S, or even when it is at the position of the floor slab S, the joint may break at the position of the joint and the rock wool sheet may fall in the event of a fire due to the short length of the joint and the heavy weight of the partial annular shape joined below. The shape of the vibration insulator 720 and the details of the action and effect based on the shape will be described later. In addition, for the vibration insulator 820, the pipe body 210 and the drain pipe connection part 230 on which the vibration insulator 820 is provided in the drain pipe joint 200 are substantially straight pipe shapes and do not have a three-dimensional shape (straight pipe part + diameter-reduced part (tapered part)) like the pipe body 110, so the rock wool sheet in the development shape shown in FIG. 8(A) described above may or may not be adopted.

[0038] 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 on the inner layer side or the thermally expandable fire-resistant sheet 712. 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 serving as the sound insulation cover 730) are determined based on the thermal expansion material (thermally expandable fire-resistant material 612 and thermally expandable fire-resistant sheet 712) The installation method for preventing the rock wool from falling is, for example, by using adhesive or double-sided tape.

[0039] Below, a manufacturing method (not a construction method) for a drainage pipe fitting 100 having an outer layer member 700 with this three-layer structure or a drainage pipe fitting 200 having an outer layer member 800 will be described, which is the installation procedure for the outer layer member 700 or the outer layer member 800. First, the recess 112 or the recess 212 is filled with the putty-like heat-expandable fire-resistant material 612. Then, the heat-expandable fire-resistant sheet 712 is attached. In the drain pipe joint 100, the heat-expandable fire-resistant sheet 712 is separated from the putty-like heat-expandable fire-resistant material 612, but in the drain pipe joint 200, the heat-expandable fire-resistant sheet 712 is attached so as to cover all or a part of the putty-like heat-expandable fire-resistant material 612. Furthermore, the vibration-damping material 714 is attached to the outer peripheral surface of the pipe main body 110 or the drain pipe connection part 230 with an adhesive or a pressure-sensitive adhesive. At this time, the innermost layer 710 in this three-layer structure is either the heat-expandable fire-resistant sheet 712 or the vibration-damping material 714. Although not layered, in these drain pipe joints 100 and 200, there is a heat-expandable fire-resistant material 612 filled in the recess 112 or the recess 212 on the inner layer side of the heat-expandable fire-resistant sheet 712.

[0040] A rock wool sheet (a development view of which is shown in FIG. 8(A)) as vibration insulator 720 or a rock wool sheet (a development view of which is not shown but has a rectangular shape) as vibration insulator 820 is wound on top of the thermally expandable fireproof sheet 712 and vibration-damping material 714. The rock wool sheet is then covered with an EPDM rubber cover as sound insulation cover 730. The EPDM rubber cover as sound insulation cover 730 exhibits water-stopping properties, sound insulation properties, and vibration insulation properties. The EPDM rubber cover as sound insulation cover 730 may be integrally molded and bonded to drain pipe joint 100 or drain pipe joint 200 to exhibit water-stopping properties, or may not be bonded and exhibit water-stopping properties only by tension (which is exhibited by the elasticity of rubber). In this case, as shown in the cross-sectional shapes in Figures 5 to 7 or Figures 13 to 14, it is preferable to provide an upper end portion of the EPDM rubber cover serving as sound-proofing cover 730 with a thick, annular upper end water-stopping portion 732 at the upper end and / or a lower end portion of the EPDM rubber cover with a similar thick, annular lower end water-stopping portion 734 (although having a different diameter) at the lower end to enhance water-stopping properties.

[0041] The drainage pipe joint 100 or the drainage pipe joint 200, the outline of which has been described above, is formed of one or more resin injection moldings, is provided penetrating the floor slab S of a building, and can fully exert fire resistance and suppress drainage vibration. In particular, in the three-layered outer layer member 700 or the outer layer member 800, a vibration-damping material 714, for example, butyl rubber, is provided as the innermost layer 710 in close contact with the outer surface of the pipe main body 110 or the outer surface of the pipe main body 210 and the drainage pipe connection part 230 to suppress vibration extremely effectively, a vibration insulator 720, for example, a rock wool sheet, or a vibration insulator 820 (whose developed shape is different from the vibration insulator 720) is provided as an intermediate layer loosely and fixed at several points to exhibit sound absorption, fire resistance, sound insulation, and vibration insulation properties, and a vibration insulator 820, for example, a rock wool sheet, ... outermost layer. The sound-insulating cover 730, an example of which is an EPDM rubber cover, is provided to exhibit water-stopping, sound-insulating and vibration-insulating properties, and vibrations (for example, generated by hitting the swirl vane 114) caused by drainage flowing down the pipe body 110 or pipe body 210 and the drain pipe connection part 230 are suppressed by the vibration-damping material 714, and then the vibrations are further blocked by the vibration insulator 720 or vibration insulator 820, and further, noise caused by the vibrations is blocked by the sound-insulating cover 730, so that drainage vibrations can be suppressed extremely effectively. 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 the materials is covered with a plurality of layers including a layer exhibiting fire-resistance, so that fire-resistance performance can be fully exhibited.

[0042] Next, the drain pipe joint 100 or the drain pipe joint 200 will be described in more detail below. As with the above-mentioned overview, the drain pipe joint 100 will be described with reference to Figures 1 to 8, and the drain pipe joint 200 with reference to Figures 9 to 15. Furthermore, configurations common to the drain pipe joint 100 and the drain pipe joint 200 may be described by using the drain pipe joint 100 as a representative example.

[0043] <Vibration-damping material: Drainage pipe joints 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 drain pipe joint 100 is integrally provided on at least a part of the outer peripheral surface of at least the part of the pipe body 110 that passes through the through hole of the floor slab S. It is not limited to being provided on the entire outer peripheral surface of the pipe body 110, and it may be provided only on a part of the outer peripheral surface of the pipe body 110 (as long as its position is on the floor slab S). In addition, the vibration-damping material 714 of the innermost layer 710 constituting the outer layer member 800 of the drain pipe joint 200 is integrally provided on at least a part of the outer peripheral surface of at least the part of the pipe body 210 that passes through the through hole of the floor slab S, and is also provided on the drain pipe connection part 230. It is not limited to being provided on the entire outer peripheral surface of the pipe body 210, and it may be provided only on a part of the outer peripheral surface of the pipe body 210 (as long as its position is on the floor slab S). Here, unlike in FIGS. 10 to 14, a vibration-damping material 714 is integrally provided on the pipe main body 210 instead of the thermally expandable fireproof sheet 712.

[0044] It is preferable that the vibration-damping material 714 is integrally provided by adhesion or bonding to the entire outer peripheral surface on which the vibration-damping material 714 is provided. Furthermore, it is preferable that the vibration-damping material 714 is formed in a sheet shape and wrapped around the outer peripheral surface. In this way, by providing the vibration-damping material 714, for example butyl rubber, as the innermost layer 710 in close contact with at least a portion of the outer peripheral surface (outer surface) of the pipe body 110 or the outer peripheral surface (outer surface) of the pipe body 210 and the drain pipe connection portion 230, and integrating it with the drain pipe fitting, vibrations generated in the drain pipe fitting can be extremely effectively suppressed.

[0045] It is also preferable to form a two-layer outer layer member by providing vibration insulator 720 or vibration insulator 820, for example, rock wool, on the outer periphery of vibration-damping material 714, and it is also preferable to form a three-layer outer layer member by providing sound-insulating cover 730, for example, an EPDM rubber cover, on the outer periphery of vibration insulator 720 or vibration insulator 820. When this three-layer structure is adopted, it is preferable to provide vibration insulator 720 or vibration insulator 820 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.

[0046] More specifically, in the drainage pipe joint 100, the pipe body 110 at least comprises a straight pipe section 116 and a reduced diameter section 118 below the straight pipe section 116, and in this case, it is preferable that the vibration insulator 720 is provided so as to be intermittently fixed in the circumferential direction of the sound insulation cover 730 in a height range corresponding to the straight pipe section 116. Also, in the drainage pipe joint 100 and the drainage pipe joint 200, it is preferable that the vibration insulator 720 or the vibration insulator 820 is provided so as to be fixed by dots at two to four points in the circumferential direction of the sound insulation cover 730 on the outer layer side.

[0047] In this way, by providing vibration insulator 720, an example of which is a rock wool sheet, or vibration insulator 820 (having a different expanded shape from vibration insulator 720) as an intermediate layer and loosely fixing it 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 and fire resistance (when a heat-expandable fire-resistant material is provided instead of / in addition to vibration damping material 714), sound insulation and vibration insulation properties are exhibited, and by providing sound insulating cover 730, an example of which is an EPDM rubber cover, as the outermost layer to exhibit water stoppage, sound insulation and vibration insulation properties, vibrations generated in the drainage pipe joint can be extremely effectively suppressed.

[0048] As described above, when the drainage pipe joint 100 and the drainage pipe joint 200 are formed of one or more (here, seven) resin injection-molded products (non-fireproof) (when the drainage pipe joint is limited to resin), it is also preferable to provide a portion in which a sheet-shaped heat-expandable fire-resistant sheet 712 is provided (attached) on the outer circumferential surface of at least a portion of the pipe body 110 or the pipe body 210 that passes through the through hole of the floor slab S, instead of at least a portion of the vibration-damping material 714. In this case, in the drainage pipe joint 100, a sheet-shaped heat-expandable fire-resistant sheet 712 is provided on the pipe body 110 instead of a portion of the vibration-damping material 714 provided on the pipe body 110. In the drainage pipe joint 200, a sheet-shaped heat-expandable fire-resistant sheet 712 is provided (attached) on the pipe body 210 instead of the entire vibration-damping material 714 provided on the pipe body 210.

[0049] In this way, if the drain pipe fitting 100 or the drain pipe fitting 200 or the like burns, the heat will cause the heat-expandable fire-resistant sheet 712 to expand radially inward, crushing the hollow portion of the drain pipe fitting 100 or the drain pipe fitting 200 and blocking the drain pipe fitting 100 or the drain pipe fitting 200, and therefore the drain pipe structure using this drain pipe fitting 100 or the drain pipe fitting 200 can block the pipeline to prevent the flow of flames, smoke, etc. in the event of a fire.

[0050] In addition, 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 a 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.

[0051] In this way, even if the drainage pipe fitting 100 or the like is burned, 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 fitting 100 blocked by the heat-expandable fire-resistant sheet 712, thereby preventing the vibration insulator 720 from falling in the event of a fire.

[0052] <Sound insulation 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 joint 100 is provided on the outer periphery of the vibration insulator 720 over the entire vertical length of the vibration insulator 720 provided on at least a part of the outer periphery of at least the part of the pipe body 110 that passes through the through hole of the floor slab S. The outermost sound-insulating cover 730 constituting the outer layer member 800 of the drainage pipe joint 200 is provided on the outer periphery of the vibration insulator 820 over the entire vertical length of the vibration insulator 820 provided on at least a part of the outer periphery of at least the part of the pipe body 210 that passes through the through hole of the floor slab S.

[0053] By providing the sound insulation cover 730, for example an EPDM rubber cover, around the outer periphery of the vibration isolator 720 or vibration isolator 820 over the entire vertical length of the same, high sound insulation performance can be achieved. The soundproof cover 730, which is an example of an EPDM rubber cover, has a water-stopping effect, a sound-proofing effect, and a vibration-insulating effect. Therefore, in addition to the above-mentioned sound-insulating performance, it is possible to achieve high water-stopping performance and high vibration-insulating performance.

[0054] Moreover, this sound-insulating cover 730 preferably has an upper end water-stopping portion 732 at the upper end and / or a lower end water-stopping portion 734 at the lower end. The water stop portion 734 is provided so as to abut (including the case where the water stop portion 734 is abutted by being joined with an adhesive or the like) against the outer surface of the drain pipe joint 100 or the drain pipe joint 200. The upper end water stop portion 732 and the lower end water stop portion 734 are formed by thick portions that are thicker than the main body of the sound insulation cover 730. For this reason, it is possible to realize high water stop performance and also have excellent strength.

[0055] Furthermore, this sound-insulating cover 730 is integrally molded with a cover body having a length corresponding to the overall vertical length of vibration insulator 720 or vibration insulator 820, including upper end water-stopping portion 732 and / or lower end water-stopping portion 734, and it is preferable that sound-insulating cover 730 itself be 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 cover around the outer periphery of vibration insulator 720 or vibration insulator 820 over the entire length of the cover in the vertical direction.

[0056] <Vibration insulator: Basically, drainage pipe joints are not limited to being made of resin, but a reduced diameter section is required> In the drain pipe joint 100, the pipe body 110 at least comprises a straight pipe section 116 and a reduced diameter section 118 below the straight pipe section 116, and in this case, the vibration insulator 720 of the intermediate layer constituting the outer layer member 700 of the drain pipe joint 100 is provided on at least a part of the outer periphery of at least the part of the pipe body 110 that passes through the through hole of the floor slab S. The vibration insulator 720 is a sheet having a predetermined shape shown in Fig. 8(A) in the developed state (it may have the shape of the vibration insulator 726 shown in Fig. 8(B) here), and is provided by being wrapped around the outer periphery of the straight pipe section 116 and the outer periphery of the reduced diameter section 118 with the edges of the sheet abutting against each other. Furthermore, after the drainage pipe fitting 100 has been installed in a building, when there is nothing attached to the outer periphery of the vibration insulator 720, the vibration insulator 720 is not exposed to the upper floor side of the floor slab S, including the portion where the edges 720S1 or edges 726S1 shown in Figure 8(A) or Figure 8(B) abut, as shown in Figures 5 to 8, but is exposed to the lower floor side of the floor slab S with only one portion where the edges abut (the dotted line portion where the edges 720S2 or edges 726S2 shown in Figure 8(A) or Figure 8(B) abut).

[0057] For this reason, even if the floor slab S is thin, the cut in the vibration insulator 720 or vibration insulator 726 can be made to appear only in one place (the cut where the edges 720S2 or the edges 726S2 abut each other) in the vertical direction (the vertical direction of the pipe body 110), so that the floor slab S will not burn and the cut in the vibration insulator 720, which has weak strength, will only appear in one place in the vertical direction (the vertical direction of the pipe body 110), so that the fire resistance of the vibration insulator 720 is not a problem and it is possible to prevent the vibration insulator 720 from falling off in the event of a fire.

[0058] More specifically, as shown in FIG. 8(A), the predetermined shape of the vibration isolator 720 is a partial annular shape, and from the outer circumference of the annular shape toward the inner circumference of the annular shape, the length L(2) corresponds to the length L(1) of the vibration isolator 720 covered by the floor slab S, and the plurality of (here, five) narrow grooves 722 having a predetermined width are provided. The outer circumference side of the annular ring is above the pipe main body 110. Each of the plurality of narrow grooves 722 is wound around the outer circumferential surface of the straight pipe section 116 so as to close the narrow grooves 722 (so that the groove sides 722S forming the narrow grooves 722 are brought into contact with each other, and so that the edges 720S1 of the sheets are brought into contact with each other), and the sheet is wound around the outer circumferential surface of the reduced diameter section 118 so as to bring the edges 720S2 of the sheets into contact with each other.

[0059] By wrapping the vibration insulator 720 as a sheet of such an expanded shape around the outer peripheral surface of the pipe body 110, the fire resistance of the vibration insulator 720 is not an issue and it will not fall off in the event of a fire, even if the pipe body 110 has at least a straight pipe section 116 and a reduced diameter section 118 below this straight pipe section 116. In particular, when a paper-made rock wool sheet is used as the vibration insulator 720, although it is difficult to process the paper-made rock wool sheet into the three-dimensional shape (straight pipe section + reduced diameter section (tapered section)) of the pipe body 110 in the drainage pipe fitting 100 by sewing or the like, the vibration insulator 720 can be attached to the pipe body 110 without sewing or the like, and the vibration insulator 720 can be prevented from falling in the event of a fire.

[0060] <Thermal expansion fire-resistant material: Drainage pipe joints are basically limited to plastic> In the drain pipe joint 100 or the drain pipe joint 200, two types of heat-expandable fire-resistant materials with different thermal expansion coefficients, a heat-expandable fire-resistant material 612 and a heat-expandable fire-resistant sheet 712, are provided, which will be described in detail with reference to Figure 15. First, in these drain pipe joints 100 or 200, 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, as shown in Figure 15 (A).

[0061] Next, in the case where two types of heat-expandable fire-resistant materials are provided at different positions in the vertical direction in the drain pipe joint 100 or the drain pipe joint 200, 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, as shown in Fig. 15(B). Note that, as described later, there are cases where this relationship in the vertical thermal expansion coefficient does not hold (as an example, the drain pipe joint 100).

[0062] As described above, it is generally believed that a thermally expandable fireproof material has low shape retention after expansion when its thermal expansion coefficient is high, and high shape retention after expansion when its thermal expansion coefficient is low, so that a trade-off relationship is established 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, as shown in Figures 15(A) and 15(B). Taking these characteristics into consideration (utilizing the characteristics), and furthermore, two types of thermally expandable fireproof materials are selected according to their respective positions, weights, shapes, reaction speeds, and expansion start temperatures.

[0063] In terms of the characteristics of the shape of the thermally expandable fire-resistant material, 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, as shown in Figure 15(C). With reference to FIG. 15(D), four examples of possible applications of the thermally expandable fire-resistant material in drainage pipe joints (installed in through holes in floor slab S, with or without a reduced diameter section) are described.

[0064] First, the second example shown in Fig. 15(D) corresponds to Fig. 15(A) and corresponds to the drain pipe joint 200 according to the second embodiment. Although the height position is the same (here, the same means that there is no difference in the height direction that requires consideration of the placement of the heat-expandable fire-resistant material), when the radial positions are different, the thermal expansion coefficient of the heat-expandable fire-resistant material on the inner layer side in the radial direction is higher than the thermal expansion coefficient of the heat-expandable fire-resistant material on the outer layer side. More specifically, in the drain pipe joint 200, the putty-like heat-expandable fire-resistant material 612 filled in the recess 212 is used as the heat-expandable fire-resistant material on the inner layer side, and the heat-expandable fire-resistant sheet 712 provided so as to be in contact with the outer layer of the putty-like heat-expandable fire-resistant material 612 filled in the recess 212 is used as the heat-expandable fire-resistant material on the outer layer side. Since the putty-like material has a higher thermal expansion coefficient than the sheet-like material, the thermally expandable fire-resistant material 612 on the inner layer side has a higher thermal expansion coefficient than the thermally expandable fire-resistant sheet 712 on the outer layer side.

[0065] Next, the third example shown in Figure 15(D) corresponds to Figure 15(B), and although the radial positions are the same (same here means that there is no radial difference that would warrant considering the placement of the heat-expandable fire-resistant material), when 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, in the fourth example shown in Figure 15 (D), when both the radial position and the height position are different, a heat-expandable fire-resistant material with a high thermal expansion coefficient is arranged on the upper height side and the radial inner layer side, and a heat-expandable fire-resistant material with a low thermal expansion coefficient is arranged on the lower height side and the radial outer layer side.

[0066] Finally, the drain pipe joint 100 according to the first embodiment corresponds to the first example shown in FIG. 15(D). In this case, two types of heat-expandable fire-resistant materials are provided at different positions in the vertical direction, so that, normally, as shown in FIG. 15(B) (as in the third and fourth examples of FIG. 15(D)), a heat-expandable fire-resistant material with a high thermal expansion coefficient is arranged at the upper side of the height position, and a heat-expandable fire-resistant material with a low thermal expansion coefficient is arranged at the lower side of the height position. However, in the drain pipe joint 100, a putty-like heat-expandable fire-resistant material 612 filled in the recess 112 is used as the lower heat-expandable fire-resistant material, and a sheet-like heat-expandable fire-resistant sheet 712 is used as the upper heat-expandable fire-resistant material. Since 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, and does not follow FIG. 15(B).

[0067] In the drain 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 to quickly block the reduced diameter section 118 with a small pipe diameter with the putty-like heat-expandable fire-resistant material 612 with a high thermal expansion coefficient. On the other hand, since the shape stability is low (since 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 represented by rock wool having fire resistance and flame-shielding properties, and the shape of the reduced diameter section 118, in which the pipe diameter is gradually reduced, is held, thereby preventing the putty-like heat-expandable fire-resistant material 612 from falling off and compensating for the low shape stability.

[0068] In this way, there may be exceptions to the height direction in the arrangement of the thermally expandable fireproof material based on the thermal expansion coefficient. Note that the thermally expandable fireproof material in Fig. 15(D) is shown as a rectangle indicating a sheet shape, but the thermally expandable fireproof material in Fig. 15(D) may be a sheet shape or a putty shape, or may be a combination of a sheet shape and a sheet shape, a combination of a putty shape and a putty shape, or a combination of a sheet shape and a putty shape, and as long as two types of thermally expandable fireproof materials with different thermal expansion coefficients are used, the scope of the present invention includes a third type of thermally expandable fireproof material used in a third place, not limited to two places.

[0069] In addition to the examples of the arrangement of the heat-expandable fire-resistant material 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 the straight pipe section 116, two types of heat-expandable fire-resistant material 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 having 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.

[0070] In another example, the two types of heat-expandable fire-resistant materials having different thermal expansion coefficients are provided to have overlapping portions. For example, the drain pipe joint 200 is such an example. Another example is that at least one of the two types of heat-expandable fire-resistant materials having different thermal expansion coefficients is provided at a position corresponding to the floor slab S. For example, the drain pipe joint 100 and the drain pipe joint 200 are such examples, and 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, so that the hollow part of the drain pipe joint 100 or the drain pipe joint 200 can be quickly crushed and blocked.

[0071] As described above, such thermally expandable fireproof materials having different thermal expansion coefficients are preferably provided in either a sheet-like ring shape provided around the straight pipe section 116 of the drain pipe joint 100, or a putty-like filling shape provided by filling the recess 112 of the drain pipe joint 100 or the recess 212 of the drain pipe joint 200. Thus, vibration damping properties can be exhibited by the sheet-like thermally expandable fireproof material provided in a ring shape and the putty-like thermally expandable fireproof material provided in a filling shape.

[0072] <How to install drainage pipe joints: Basically, drainage pipe joints are limited to plastic> The construction method for placing and installing a drainage pipe joint in a through hole in the floor slab S of a building is described below. Drainage pipe joints that are preferably employed in this construction method further have the following structural features in the drainage pipe joint 100 and the drainage pipe joint 200. In the following, the drainage pipe joint 100 will be described as a representative example.

[0073] This drainage pipe joint 100 is formed entirely from one or more resin injection moldings, and when installed in a building, it is made up of a pipe body 110 that is placed in a through hole in a floor slab S, an upper riser pipe connection part 120 that protrudes above the floor slab S and connects a drainage riser pipe 520 that flows in drainage from the upper floor, a drainage pipe connection part 130 that protrudes below the floor slab S and connects a drainage pipe (here, a drainage riser pipe 530) that flows out drainage to the lower floor, and a drainage pipe connection part 130 that protrudes below the floor slab S and connects a drainage riser pipe 530 that flows out drainage to the lower floor. and a horizontal branch pipe connection part 140 that connects a horizontal drain branch pipe 510 above the slab S. Further structural features include that the upper riser pipe connection part 120 or the horizontal branch pipe connection part 140 is formed of transparent resin, a vibration-damping material 714 is integrally provided with the pipe main body 110 on at least a portion of the outer circumferential 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 an obstruction that would prevent the transparent resin from being visible. In this way, prior to construction of this drainage pipe fitting 100, vibration-damping material 714 is integrally provided with the pipe body 110 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, 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.

[0074] 5, in this drainage pipe joint 100, the upper riser pipe connection part 120 or the horizontal branch pipe connection part 140 is formed of a transparent (including both colorless and transparent) resin, and the receiving part of the upper riser pipe connection part 120 or the receiving part of the horizontal branch pipe connection part 140 is not provided with any shielding material that would prevent the transparent resin from being seen before construction. Note that here, before construction, vibration-damping material 714 is provided other than the receiving part of the upper riser pipe connection part 120 or other than the receiving part of the horizontal branch pipe connection part 140, but these vibration-damping materials 714 may not be provided at all and may be provided later after construction.

[0075] A construction method in which a drainage pipe fitting 100 further having such structural features is placed in a through hole in the floor slab S of a building and constructed involves visually confirming (while recognizing) the fitting state between the upper riser pipe connection part 120 and the drainage riser pipe 520 through the transparent resin of the upper riser pipe connection part 120 and connecting the drainage riser pipe 520 to the upper riser pipe connection part 120, and visually confirming (while recognizing) the fitting state between the horizontal branch pipe connection part 140 and the drainage horizontal branch pipe 510 through the transparent resin of the horizontal branch pipe connection part 140 and connecting the drainage horizontal branch pipe 510 to the horizontal branch pipe connection part 140.

[0076] Then, while visually checking (recognizing) the receiving portion of the transparent resin in this manner, the drainage riser 520 is connected to the upper riser connection portion 120, and the drainage horizontal branch pipe 510 is connected to the horizontal branch pipe connection portion 140, and further, after the placement of the drainage piping joint 100 in the through hole of the floor slab S is completed, Mortar M is filled into the gap between the through hole of the floor slab S and the drainage pipe joint 100. Furthermore, after filling with this mortar M, a sound-insulating member is provided on the outer periphery of the upper riser pipe connection part 120 or the outer periphery of the side branch pipe connection part 140. This sound-insulating member is different from the above-mentioned sound-insulating cover 730 (including cases where they are the same, but basically), 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. As an example of such a sound-insulating member, the above-mentioned vibration-damping material 714 is provided at the receiving port part, a vibration insulator 720 represented by the above-mentioned rock wool and / or a sound-insulating cover 730 formed of a rubber cover made of EPDM or the like is provided instead of / in addition to this vibration-damping material 714, and a vibration insulator made of glass wool different from rock wool and / or a sound-insulating cover formed of a cover made of vinyl chloride or the like is provided instead of / in addition to this 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-proofing 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).

[0077] In this case, the sound-proofing material may be installed so as to cover the outer periphery of the drainage pipe joint 100, or the sound-proofing material may be made to include glass wool as a sound-absorbing material and a polyvinyl chloride sound-proofing sheet as a sound-proofing cover, and the sound-proofing material made of glass wool may be fixed (including the case where it is fixed by sewing, adhesive, etc.) to the polyvinyl chloride sound-proofing cover on the outer layer side (rather than the vibration-damping material 714 on the inner layer side).

[0078] In this way, before construction of the drainage pipe joint 100, the receiving portion of the upper riser pipe connection part 120 or the horizontal branch pipe connection part 140 formed of a transparent resin does not have a shielding material that makes the transparent resin invisible, so that the fitting state of the upper riser pipe connection part 120 and the drainage riser pipe 520 or the fitting state of the horizontal branch pipe connection part 140 and the horizontal drainage branch pipe 510 can be visually recognized through the transparent resin to connect the drainage pipe, thereby suppressing construction errors. In addition, since the sound insulation member containing rock wool, glass wool, or the like as a sound absorbing material is attached to the drainage pipe joint 100 after backfilling with mortar M, the outer diameter of the drainage pipe joint 100 does not increase when backfilling with mortar M, making it easy to backfill the mortar M, and also eliminating the possibility that moisture from the mortar M will splash onto the rock wool, glass wool, or the like and wet them.

[0079] As described above, the drain pipe connection part of the drain pipe joint 100 is formed of transparent resin, and before construction, the construction of the drain pipe joint 100 is started in a state where the transparent resin of the receiving part of the connection part can be visually observed (a state where there is no obstruction that makes the transparent resin of the receiving part invisible), so that the connection state between the drain pipe joint 100 and other drain pipes can be visually confirmed while connecting, which can suppress construction errors, and since a sound-proofing member containing rock wool, glass wool, etc. as a sound-absorbing material is provided after backfilling with mortar, it is easy to backfill with mortar M, and the possibility of wetting rock wool, glass wool, etc. due to moisture in mortar M can be eliminated. Then, after construction of this drain pipe joint 100, as described above, drain vibration can be suppressed extremely effectively, fire resistance can be fully exerted, and high water-stopping performance can be expressed.

[0080] <Modification> In the above-described embodiments, sound-proof cover 730 is formed containing a rubber-based (EPDM (ethylene propylene diene rubber) etc.), elastomer-based or olefin-based (polyethylene resin etc.) material and has in common the point of being elastic (stretchable); however, in the variants described below (Variations 1 and 2 described below), this sound-proof cover is different in that it is formed from a hard resin and has an elastic material (rubber gasket).

[0081] The outermost layer of the three-layer structure of the drainage pipe joint in the above-mentioned embodiment is constituted by The sound-insulating cover 730 is formed by containing a rubber-based, elastomer-based, or olefin-based material, and has elasticity (elasticity), and exhibits water-stopping, sound-insulating, and vibration-insulating properties. When the sound-insulating cover 730 is set on a drainage pipe joint (more precisely, when the sound-insulating cover 730 is set on the main body side of a drainage pipe joint on which two layers of vibration-damping material 714 and vibration insulator 720 provided on the pipe main body are set), the main body side and the sound-insulating cover are joined with an adhesive to stop water from entering. The workability of setting the sound-insulating cover 730 may be unfavorable.

[0082] Although this is not a major problem with the drain pipe joint according to the embodiment described above, when setting this sound-insulating cover 730, for example, adhesive is applied, and the sound-insulating cover is stretched (to increase the inner diameter) using the elasticity of the sound-insulating cover, and the sound-insulating cover 730 is set to cover the drain pipe joint that does not include the sound-insulating cover 730, and the excess adhesive is wiped off, and it is confirmed that the adhesive has solidified and the sound-insulating cover has been joined to the main body. Therefore, if the procedure is complicated or if it takes time for the adhesive to solidify, this setting operation may take time.

[0083] In contrast, the sound insulation cover of the drainage pipe joint according to this modified example has a fixed shape because it does not have any stretchability (elasticity), and is set so that the sound insulation cover is placed over the drainage pipe joint that has nothing other than the sound insulation cover (it is not stretchable because it has no stretchability (elasticity) and is not stretched), and an elastic material (rubber packing) is provided between the inner peripheral surface of the sound insulation cover and the outer surface of the drainage pipe joint. The sound insulation cover is joined to the drainage pipe joint via this elastic material (rubber packing) (without using adhesives, etc.), and the sound insulation cover in which the elastic material (rubber packing) is combined with the sound insulation cover body that does not have any stretchability exhibits water stopping properties, sound insulation properties, and vibration insulation properties.

[0084] Below, an overview of the two modified examples (Modification 1 in which an elastic material (rubber packing) is provided on the sound-insulating cover side, and Modification 2 in which an elastic material (rubber packing) is provided on the drain pipe joint (main body) side) will be described. When explaining matters common to sound-insulating cover 731 of drain pipe joint 101 relating to Modification 1 and sound-insulating cover 741 of drain pipe joint 103 relating to Modification 2, sound-insulating cover 730, which is the same as in the embodiment described above, may be used as a representative example.

[0085] The sound-insulating cover (more specifically, sound-insulating cover 731 or sound-insulating cover 741) of the drain pipe fitting (more specifically, drain pipe fitting 101 or drain pipe fitting 103) of this modified example includes a non-elastic 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, and is provided with an elastic material (rubber gasket) (more specifically, elastic material (rubber gasket) 735 or elastic material (rubber gasket) 745) only at the upper end or at the upper end and lower end (here, not only the upper end but the upper end and lower end) between the cover body and the outer surface of the drain pipe fitting. Here, 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) to provide water-stopping properties, and by combining the elastic material (rubber gasket) with the sound-insulating cover main body, which does not have elasticity, the sound-insulating cover provides sound-insulating and vibration-insulating properties in addition to water-stopping properties.

[0086] Here, the elastic material (rubber packing) is provided on the inner peripheral surface of the sound insulation cover main body (sound insulation cover main body 733) or the outer surface of the drainage pipe joint (water collection chamber lower part 905 of horizontal branch pipe connection part 140). The cover body (sound insulation cover body 733 or sound insulation cover body 743) is made of hard resin. It is preferable that the material is made of

[0087] As shown in Modification 1 (as shown in Figs. 16 and 17), it is preferable that the sound-insulating cover (sound-insulating cover 731) abuts against the outer surface of the drainage pipe joint via a ring-shaped elastic member (rubber ring) 900 having elasticity and a ring shape corresponding to the outer diameter of the drainage pipe joint (more specifically, the outer diameter of the water-collection chamber lower portion 905 of the horizontal branch pipe connection portion 140). Note that such an embodiment can also be applied to Modification 2 (it is just illustrated in Modification 1 and not illustrated in Modification 2).

[0088] In the above embodiment, the vibration insulator 720 is preferably provided so as to be intermittently fixed in the circumferential direction of the sound insulation cover 730 in the height range corresponding to the straight pipe section 116, and it has been explained that the vibration insulator 720 is preferably provided so as to be fixed in two to four places in the circumferential direction of the outer layer side sound insulation cover 730 by dot-fixing, but instead, it is also preferable to fix it as follows. The vibration insulator 720 is preferably fixed to the outer layer side sound insulation cover by being fixed continuously or intermittently over one circumference of the outer side of the vibration insulator 720 at least one place in the height direction of the outer layer side sound insulation cover 730.

[0089] The following provides a more detailed explanation (partly divided into Variation 1 and Variation 2) of the soundproof cover and elastic material, as well as the construction method of the drainage pipe joint. Here, the elastic material (rubber packing) may be provided on the sound insulation cover side (Modification 1 described later) or on the drain pipe joint (main body) side (Modification 2 described later), but regardless of these differences, the elastic material (rubber packing) constitutes a part of the sound insulation cover. Details will be described later, but the sound insulation cover 731 in the drain pipe joint 101 according to Modification 1 is composed of a sound insulation 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 insulation cover main body 733, and the sound insulation cover 741 in the drain pipe joint 103 according to Modification 2 is composed of a sound insulation 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 both modified examples, this elastic material (rubber packing) is provided only at the upper end or at the upper end and lower end between the cover body and the outer surface of the drain pipe joint, and water stopping properties are exhibited as described above. And, by configuring the sound insulation cover in this manner in this modified example (i.e., by configuring the sound insulation cover to include the elastic material (rubber packing)), sound insulation cover 731 or sound insulation cover 741 in this modified example also exhibits water stopping properties, sound insulation properties, and vibration insulation properties, similar to sound insulation cover 730 in the above-mentioned embodiment.

[0090] Here, the drain pipe joint according to the modified examples (modified example 1 and modified example 2) described in detail below is different in that the sound insulating cover of the drain pipe joint according to the above-mentioned embodiment is made of a rubber-based material having elasticity (stretchability), whereas the sound insulating cover is made of a hard resin material. As described above, the drain pipe joint according to the embodiment is also different in that it is provided with a ring elastic material (rubber ring) 900, but this ring elastic material (rubber ring) 900 can also be used in the above-mentioned embodiment. Other structures that are the same as those in the above-mentioned embodiment are given the same reference numerals as those in the above-mentioned embodiment. The explanations of those structures overlap with the above-mentioned explanations, so they will not be repeated here.

[0091] Here, typical examples of the hard resin used as the cover body (sound insulation cover body) of the sound insulation cover in the drainage pipe joint according to the modified example include vinyl chloride and polyethylene. Furthermore, it is also preferable to form such hard resin from a resin material such as an olefin-based material (a resin composition containing 300 to 600 parts by weight of inorganic filler per 100 parts by weight of olefin-based resin) or the like.

[0092] 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 balloon, aluminum nitride, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, carbon balloon, 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.

[0093] Among these, calcium carbonate is preferably used as the inorganic filler in terms of the balance between weight and cost. These may be used alone or in combination of two or more kinds. 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. Furthermore, it may be formed of a material other than an olefin-based material, such as polyvinyl chloride resin (mentioned above), polystyrene resin, ABS resin, AS resin, elastomer material, or the like. In the following modified examples, the hard resin used for the sound-insulating cover body of the sound-insulating cover will be described as being polyvinyl chloride.

[0094] Here, in the drainage pipe joint according to the modified example, the elastic material (rubber) constituting a part of the sound insulation cover The materials used for packing are generally those that can be used as so-called packing. Representative examples of rubber materials include EPDM (ethylene propylene diene rubber) and SBR (styrene butadiene rubber). In addition to these, thermoplastic elastomers and polyethylene foams can also be used. In the following modified examples, the rubber material used as the elastic material (rubber packing) of the sound insulation cover will be described as EPDM (ethylene propylene diene rubber). The material used for the ring elastic material (rubber ring) is not limited, but may be the same material as the elastic material (rubber packing) described above.

[0095] <Modification 1: Elastic material (rubber packing) on ​​the soundproof cover side> The drainage pipe joint 101 according to the first modification will be described in detail with reference to Figures 16 and 17. Figure 16 is a cross-sectional view showing a drainage piping structure in which the drainage pipe joint 101 according to the first modification is adopted, and Figure 17 is a view for explaining a state in which a sound insulation cover 731 (more precisely, a sound insulation cover 731 consisting of a sound insulation cover main body 733 and an elastic material (rubber packing) 735, and further, optionally, a vibration insulator 720) is set in the drainage pipe joint 101 of Figure 16 (for example, not at the construction site but at a manufacturing factory for the drainage pipe joint 101).

[0096] As shown in these figures, the sound insulation cover 731 provided in the drainage pipe joint 101 according to this modification includes a sound insulation cover main body 733 that does not have elasticity and has a length corresponding to the overall vertical length of the vibration insulator 720, and is provided with an elastic material (rubber packing) 735 only at the upper end or at the upper end and lower end between the sound insulation 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 end and the lower end between the sound insulation cover main body 733 and the outer surface of the drainage pipe joint 101, but it may be provided only at the upper end. The elastic material (rubber packing) 735 can provide the water-stopping, sound-insulating, and vibration-insulating properties of the drain pipe joint 101 (similar to the above-mentioned embodiment, although the material of the sound-insulating cover body is different from that of the above-mentioned embodiment). Here, in the case where the elastic material (rubber packing) 735 is provided on the sound-insulating cover body 733 to form the sound-insulating cover 731 as in this modified example (more specifically, in the case where a manufacturing method in which the sound-insulating cover 731 (sound-insulating cover body 733 + elastic material (rubber packing) 735) is set on the drain pipe joint (body) or a construction method in which the sound-insulating cover 731 (sound-insulating cover body 733 + elastic material (rubber packing) 735) is set in the through hole and then the drain pipe joint (body) is installed) the elastic material (rubber packing) 735 is provided (so as to be fitted into the recess) in the inner peripheral surface of the sound-insulating cover body 733 of the sound-insulating cover (more specifically, the upper recess 733DU and the lower recess 733DD). Regarding these two recesses, if elastic material (rubber packing) 735 is provided only on the upper side, it is not necessary to provide lower recess 733DD in sound insulation cover body 733. Note that this elastic material (rubber packing) 735 has a return portion with a L-shaped cross section to make it easier to insert drain pipe joint 101 other than sound insulation cover 731 from above sound insulation cover 731 and to prevent it from returning midway, as shown in Fig. 17.

[0097] In this modified example, the elastic material (rubber gasket) 735 is provided on the inner surface of the sound-proofing cover main body 733, which differs from the drain pipe fitting 103 of modified example 2 in that the elastic material is provided on the outer surface of the drain pipe fitting. As described above, although not limited thereto, the sound-insulating cover main body 733 is made of hard resin.

[0098] In order for the drainage pipe fitting 101 of this modified example to have such a configuration, the outer layer member 701 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 101 (however, the elastic material (rubber gasket) 735 constituting the outermost sound insulating cover 731 abuts against the outer surface of the drainage pipe fitting 101, so that the sound insulating cover 731 has a portion which becomes the innermost layer, but this is ignored because the contact area of ​​the elastic material (rubber gasket) 735 is small), the vibration damping material 714 (or heat-expandable fire-resistant sheet 712), the vibration insulator 720 formed from fire-resistant inorganic fiber, and the sound insulating cover 731 (sound insulating cover main body 733 and elastic material (rubber gasket) 735).

[0099] In this manner, in the drainage pipe fitting 101 of this modified example, 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), so that the sound insulating cover 731 (more precisely, the sound insulating cover main body 733 and the elastic material (rubber gasket) 735 constituting the sound insulating cover 731, and optionally, the vibration insulator 720) is set to the drainage pipe fitting 101 (more precisely, other than the sound insulating cover main body 733 and the elastic material (rubber gasket) 735 constituting the sound insulating cover 731, and the vibration insulator 720).

[0100] 17, the soundproof 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 a ring shape corresponding to the outer diameter of the drain pipe joint 101. In the connection between the horizontal branch pipe connecting part 140 and the pipe body 110 in this drain pipe joint 101, the horizontal branch pipe connecting part 140 is fitted inside the pipe body 110 (the inner peripheral surface of the fitting part 902 of the pipe body 110 and the outer peripheral surface of the fitting part 904 of the horizontal branch pipe connecting part 140 are joined), so that a step is generated between the outer peripheral surface of the horizontal branch pipe connecting part 140 and the outer peripheral surface of the pipe body 110, in which the pipe body 110 side protrudes, as shown by the hollow triangle mark in FIG. When this step occurs, as shown in FIG. 17, when setting the sound insulation cover 731 (more precisely, the sound insulation cover 731 plus, optionally, the vibration insulator 720) to the drain pipe joint 101 (more precisely, other than the sound insulation cover 731 and the vibration insulator 720), it may be difficult to set the sound insulation cover 731 due to the step. A ring elastic member (rubber ring) 900 is provided on the outer peripheral surface of the water collection chamber lower portion 905 of the horizontal branch pipe connecting portion 140, and the step is eliminated as indicated by the filled triangle mark and the open triangle mark.

[0101] This ring elastic material (rubber ring) 900 has an inner diameter corresponding to the outer diameter of the fitting portion 904 of the horizontal branch pipe connection portion 140 (= the outer diameter of the lower part of the water collection chamber 905), and its thickness (outer diameter) corresponds to the outer diameter of the fitting portion 902 of the pipe main body 110. When this ring elastic material (rubber ring) 900 is set in the fitting portion 904 of the horizontal branch pipe connection portion 140, the outer diameter of the ring elastic material (rubber ring) 900 is in the position indicated by the filled-in triangle mark and becomes approximately equal to the outer diameter of the fitting portion 902 of the pipe main body 110 indicated by the filled-in 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). This ring elastic material (rubber ring) 900 can be preferably applied not only to the two modified examples, but also to cases where the sound-insulating cover body is made of a rubber-based material such as EPDM (i.e., all of the drainage pipe joints related to the embodiments described above).

[0102] In all the above-mentioned embodiments, the vibration insulator 720 is fixed to the outer layer side sound insulation cover 730 at two to four points in the circumferential direction by dot-fixing, but the present invention is not limited to this. For example, in the drainage pipe joints according to all the above-mentioned embodiments and in the drainage pipe joints according to all the modified examples (modification 1 and modification 2), the vibration insulator 720 may be fixed to the outer layer side sound insulation cover by being fixed continuously or intermittently around one circumference of the outer side of the vibration insulator 720 at at least one point in the height direction of the outer layer side sound insulation cover. In this way, vibration insulator 720, an example of which is a rock wool sheet, is provided as an intermediate layer, loosely and with the outermost circumference fixed continuously or intermittently to the sound insulating cover on the outer layer side rather than to vibration damping material 714 on the inner layer side, thereby exhibiting 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 sound insulating cover 730, an example of which is a rubber (soft) cover made of EPDM, or 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 packing) 735) is provided as the outermost layer to exhibit water stoppage, sound insulation properties, and vibration insulation properties, thereby making it possible to extremely effectively suppress vibrations generated in the drainage piping joint. As described above, the drainage pipe joint 101 according to this modified example can also achieve the same effects as the drainage pipe joint according to the above-described embodiment.

[0103] <Modification 2: Elastic material (rubber packing) on ​​the drain pipe joint (main body) side> The drain pipe joint 103 according to the modified example 2 will be described in detail with reference to Figures 18 and 19. Figure 18 is a cross-sectional view showing a drain piping structure in which the drain pipe joint 103 according to the modified example 2 is adopted, and Figure 19 is a view for explaining the state in which the sound insulation cover 741 (more precisely, only the sound insulation cover main body 743) is set in the drain pipe joint 103 of Figure 18 (for example, not at the construction site but at a manufacturing plant for the drain pipe joint 103).

[0104] The drain pipe joint 101 according to the first modification and the drain pipe joint 103 according to the second modification are different in that the drain pipe joint 101 has an elastic material (rubber packing) 735 provided on the inner peripheral surface of the sound insulation cover body 733 of the sound insulation cover 731, whereas the drain pipe joint 103 has an elastic material (rubber packing) 745 provided on the outer peripheral surface (more specifically, the water collection chamber lower portion 905 of the horizontal branch pipe connection portion 140) of the drain pipe joint 103 (not on the sound insulation cover body 743 of the sound insulation cover 741). The other configurations of the drain pipe joint 103 according to this modification are the same as those of the drain pipe joint 101 according to the first modification described above, and therefore detailed description here will not be repeated. Note that the ring elastic material (rubber ring) 900 is not shown in the drain pipe joint 103 according to this modification because it is an optional requirement (basically unnecessary) in the present invention.

[0105] In order for the drain pipe fitting 103 of this modified example to have such a configuration, the outer layer member 703 has a three-layer structure and is provided on the outer surface of the pipe main body 110 in the following order: from the outer surface of the drain pipe fitting 103 (however, the elastic material (rubber gasket) 745 constituting the outermost sound insulating cover 741 abuts against the outer surface of the drain pipe fitting 103, so that the sound insulating cover 741 has a portion which becomes the innermost layer, but this is ignored because the contact area of ​​the elastic material (rubber gasket) 745 is small), vibration damping material 714 (or heat-expandable fire-resistant sheet 712), vibration insulator 720 formed from fire-resistant inorganic fiber, and sound insulating cover 741 (sound insulating cover main body 743 and elastic material (rubber gasket) 745 provided on the outer surface of the drain pipe fitting 103).

[0106] Thus, in the drain pipe fitting 103 of this modified example, since the elastic material (rubber gasket) 745 is provided on the outer peripheral surface of the drain pipe fitting 103, the sound-insulating cover 741 (more precisely, only the sound-insulating cover main body 743 of the sound-insulating cover 741) is set on the drain pipe fitting 103 (more precisely, other than the sound-insulating cover main body 743 of the sound-insulating cover 741). As described above, the drainage pipe joint 103 according to this modified example can also achieve the same effects as the drainage pipe joint according to the above-described embodiment.

[0107] <Construction methods of modified example 1 and modified example 2> A brief description will be given of a construction method for a drainage pipe joint 101 according to Modification 1 and a construction method for a drainage pipe joint 103 according to Modification 2 with reference to Figures 20 and 21. This construction method is not a manufacturing method for a drainage pipe joint in a manufacturing factory for drainage pipe joints shown in Figures 17 and 19, but a construction method for installing a drainage pipe joint in a through hole opened in a floor slab S of a building which is the construction site for the drainage pipe joint.

[0108] A distinctive feature of this construction method is that the sound-proofing cover is set in the through hole of the floor slab S, the sound-proofing cover is embedded in the floor slab S with a filler M such as mortar, and then the drainage pipe fittings other than the sound-proofing cover are set in the embedded sound-proofing cover. The construction method of the drainage pipe joint according to the present invention may be a (conventional, ordinary) construction method in which the drainage pipe joint with the sound-insulating cover set (i.e., the drainage pipe joint completed including the sound-insulating cover) is set in the through hole of the floor slab S, and the drainage pipe joint is embedded in the floor slab S with a filler M such as mortar. That is, the construction is performed by setting the sound-insulating cover (at a manufacturing factory of the drainage pipe joint, etc.) as shown in FIG. 17 and completing the drainage pipe joint 101 as shown in FIG. 16, and then setting the completed drainage pipe joint 101 in the through hole of the floor slab S and embedding the drainage pipe joint 101 in the floor slab S with a filler M such as mortar, or by setting the sound-insulating cover (at a manufacturing factory of the drainage pipe joint, etc.) as shown in FIG. 19 and completing the drainage pipe joint 103 as shown in FIG. 18, and then setting the completed drainage pipe joint 103 in the through hole of the floor slab S and embedding the drainage pipe joint 103 in the floor slab S with a filler M such as mortar.

[0109] In the drainage pipe joint 101 relating to the first modified example, as shown in FIG. 20, 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, and optionally a vibration insulator 720) is set in a through hole in a floor slab S and the sound-insulating cover 731 is embedded in the floor slab S with a filler M such as mortar, and then the drainage pipe joint 101 (more precisely, other than the sound-insulating cover 731 and the vibration insulator 720) is set in the embedded sound-insulating cover 731 (more precisely, the sound-insulating cover 731 and, optionally, the vibration insulator 720).

[0110] In the drainage pipe joint 103 according to the second modification, as shown in FIG. 21, a sound insulation cover 741 (more precisely, only a sound insulation cover body 743) is set in a through hole of a floor slab S, and the sound insulation cover 741 is embedded in the floor slab S with a filler M such as mortar, and then the embedded sound insulation cover is Drainage pipe joint 101 (more precisely, other than sound insulation cover main body 743 of sound insulation cover 741) is set on bar 741 (more precisely, only sound insulation cover main body 743 of sound insulation cover 741).

[0111] In this way, the sound insulation cover is first embedded in the through hole of the floor slab S, and then the drainage pipe joints other than the sound insulation cover are inserted from above the sound insulation cover to be integrated. For this reason, when the void pipe is fixed vertically to the floor base before concrete is poured for the floor slab S, concrete is poured around it to create a concrete floor, and the cavity partitioned and formed inside the void pipe is used as the through hole, it was usually necessary to pull out the paper, resin or metal void pipe after curing (metal void pipes may not be pulled out), and fill the gap between the through hole and the drainage pipe joint with a filler, but if a sound insulation cover is used instead of such a void pipe (if the sound insulation cover is fixed vertically to the floor base before concrete is poured for the floor slab S, and concrete is poured around it to create a concrete floor), it is preferable in that the work of filling the gap between the through hole and the drainage pipe joint with a filler is not required (and also the work of pulling out the void pipe is not required since the void pipe is not used in the first place). In this case, it is preferable that the length of the sound insulation cover is equal to or shorter than the thickness of the slab (so as not to interfere with on-site work of pouring concrete around the sound insulation cover).

[0112] Furthermore, when carrying out construction in this manner, it is preferable that when updating the drainage pipe joints, only the sound-insulating cover can be left in the through hole of the floor slab S, and everything other than the sound-insulating cover can be updated. Here, in order to shorten the construction period, it is also possible to cast the drainage pipe joint in advance into the PC board at the PC board manufacturing factory where the PC (precast concrete) board is manufactured. In this case, it is assumed that the drainage pipe joint is directly filled into the PC board at the PC board manufacturing factory, rather than first opening a through hole in the floor slab S, installing the drainage pipe joint in the through hole, and filling the gap (the gap between the through hole and the drainage pipe joint) with a filler. Based on this assumption, it is possible to directly fill (cast) the sound insulation cover in advance into the PC board, similar to the use of the sound insulation 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 modified example of the present invention, filling the gap with a filler may not be a mandatory requirement in the construction method. Even in this case, as described above, it is preferable that the length of the sound insulation cover is the same as 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 work of pouring concrete around the sound insulation cover).

[0113] As described above, the present invention does not exclude a method in which, without first burying any of the components that make up the drainage pipe joint in the floor slab S, the drainage pipe joint shown in Figures 16 and 18, which has a sound-insulating cover set (completed as a drainage pipe joint) as shown in Figures 17 and 19, is inserted into a through hole in the floor slab S, and a filler M such as mortar is filled between the outer peripheral surface of the drainage pipe joint (in this case, the outermost circumference is the sound-insulating cover) and the inner peripheral surface of the through hole, thereby installing the drainage pipe joint in the floor slab S.

[0114] It should be noted that the embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Industrial Applicability]

[0115] The present invention is preferable for a drainage pipe joint that is installed by penetrating the floor slab S of a building, and is a drainage pipe joint that is installed by penetrating the floor slab of a building, and exhibits optimal vibration control performance, vibration insulation performance, and sound insulation performance, and has suitable water stoppage properties for exhibiting these performances. is particularly preferred. [Explanation of symbols]

[0116] 100, 200 Drainage pipe joint 110, 210 Tube body 112, 212 hollow 114 Swirling blade 120 Upper riser connection 130, 230 Drain pipe connection 140 Horizontal branch pipe connection 142 Water Collection Chamber 144, 146, 148 Side branch pipe connecting member 520 (upper floor side) drainage standpipe 530 (lower floor side) drainage standpipe 540 (lower floor side) 90 degree (compact) vent pipe 612 Thermal expandable fireproofing materials 700, 800 Outer layer material 710 Innermost layer 712 Thermally expandable fireproof sheet 714 Damping material 720, 820 (fire-resistant inorganic fiber-based vibration insulators) 730 Soundproof Cover

Claims

1. A drainage piping joint comprising: a pipe body that is placed in a through hole of a floor slab when installed in a building; an upper riser pipe connection portion that protrudes above the floor slab and connects a drainage riser pipe that allows drainage water to flow in from an upper floor; a drainage pipe connection portion that protrudes below the floor slab and connects a drainage pipe that allows drainage water to flow out to a lower floor; and a horizontal branch pipe connection portion that connects a horizontal drainage branch pipe above the floor slab, a vibration insulator provided on at least a portion of an outer periphery of at least a portion of the pipe body passing through the through hole; a sound-insulating cover provided on the outer periphery of the vibration insulator over the entire vertical length of the vibration insulator.

2. The drainage pipe joint according to claim 1, wherein the sound-insulating cover has a water-stopping effect, a sound-insulating effect and a vibration-insulating effect.

3. A drainage pipe fitting as described in claim 1 or claim 2, characterized in that the sound-proofing cover has an upper end water-stopping portion at its upper end and / or a lower end water-stopping portion at its lower end, and the upper end water-stopping portion and / or the lower end water-stopping portion abut against the outer surface of the drainage pipe fitting.

4. 4. The drainage pipe joint according to claim 3, wherein the upper end water stop portion and the lower end water stop portion are formed by thick portions that are thicker than a main body of the sound insulating cover.

5. A drainage pipe fitting as described in claim 3 or claim 4, characterized in that the sound-proof cover is integrally molded with a cover body having a length corresponding to the entire vertical length of the vibration insulator, including the upper end water-stopping portion and / or the lower end water-stopping portion, and the sound-proof cover itself is elastic.

6. The drainage pipe joint according to claim 5, wherein the sound-insulating cover is provided by utilizing the elasticity of the sound-insulating cover itself.

7. 7. A drainage pipe joint according to claim 1, wherein the vibration insulator is fixed to the sound-insulating cover on the outer layer side.

8. The pipe body includes at least a straight pipe portion and a reduced diameter portion below the straight pipe portion, 8. The drainage pipe joint according to claim 7, wherein the vibration insulator is fixed intermittently in a circumferential direction of the sound insulation cover in a height range corresponding to the straight pipe portion.

9. The drainage pipe joint according to claim 7 or 8, characterized in that the vibration insulator is fixed by point fixing at two to four points in the circumferential direction of the sound-insulating cover on the outer layer side.

10. The drainage pipe joint is formed of one or more resin injection moldings, A drainage pipe joint as described in any one of claims 1 to 9, characterized in that a heat-expandable fire-resistant material is provided on the inner layer side of the vibration insulator, and the vibration insulator is fixed to the sound-insulating cover on the outer layer side at a position above the heat-expandable fire-resistant material.

11. A drainage pipe fitting as described in any one of claims 1 to 10, further comprising a vibration-damping material integrally provided on the inner layer side of the vibration insulator, the vibration-insulating body being integrally provided on at least a portion of the outer peripheral surface of at least the portion of the pipe body that passes through the through hole.

12. The drainage pipe joint is formed of one or more resin injection moldings, The pipe body includes at least a straight pipe portion and a reduced diameter portion below the straight pipe portion, A drainage pipe fitting as described in claim 11, characterized in that a heat-expandable fire-resistant material is provided on the inner layer side of the vibration insulator in place of a portion of the vibration-damping material, and the vibration insulator is fixed to the sound-insulating cover on the outer layer side at a position above the heat-expandable fire-resistant material and at a height position corresponding to the straight pipe section.

13. The sound-insulating cover includes a non-elastic cover body having a length corresponding to the overall length of the vibration insulator in the vertical direction, A drainage pipe fitting as described in any one of claims 1 to 4, characterized in that an elastic material is provided only at the upper end, or at the upper end and the lower end, between the cover body and the outer surface of the drainage pipe fitting.

14. The drainage pipe joint according to claim 13, characterized in that the elastic material is provided on an inner peripheral surface of the cover body or an outer surface of the drainage pipe joint.

15. 15. The drainage pipe joint according to claim 13 or 14, wherein the cover body is made of a hard resin.

16. A drainage pipe fitting as described in any one of claims 1 to 15, characterized in that the sound-proof cover abuts against the outer surface of the drainage pipe fitting via a ring-shaped, elastic ring elastic material that corresponds to the outer diameter of the drainage pipe fitting.

17. A drainage pipe fitting as described in any one of claims 1 to 6, characterized in that the vibration insulator is fixed to the sound-insulating cover on the outer layer side by continuously or intermittently fixing one circumference of the vibration insulator at least at one point in the height direction of the sound-insulating cover on the outer layer side.

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