Fittings, drainage systems, buildings

Abstract

To provide a joint.SOLUTION: A joint is installed in an open hole formed on a floor slab of a building and has an aggregate part having a vertical pipe connection part to be connected to a vertical pipe extending from the upper floor and a horizontal pipe connection part to be connected to a horizontal pipe, a lower connection part to be connected to the vertical pipe extending from the lower floor, and an intermediate part that connects the aggregate part and the lower connection part and has a larger inner diameter than that of the vertical pipe. At least the intermediate part is embedded in the open hole of the floor slab, and any of the assembly part, the intermediate part, and the lower connection part is formed of resin. A first rotary member is disposed in either the aggregate part or the intermediate part. A second rotary member is disposed in the lower connection part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a joint. [Background technology]

[0002] A resin drain pipe joint has been known in the past, as described in Patent Document 1. This drain pipe joint is installed on each floor of a building, penetrating the floor slab separating the upper and lower floors, and connects the drain pipe on the upper floor with the drain pipe on the lower floor in a watertight manner. This drain pipe joint has a resin upper body with a socket to which the drain pipe of the upper floor is connected, and an upper end connection part that is embedded in the floor slab and connected to the lower end of the upper body.It also has a lower body that protrudes downward from the ceiling surface of the floor slab and has a lower end connection part to which the drain pipe of the lower floor is connected.The above-mentioned drain pipe joint also has a resin interior member that can be fixed inside the lower body and has vanes that guide the drainage water flowing down. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-58849 Summary of the Invention [Problem to be solved by the invention]

[0004] The above-mentioned drainage pipe joints are used in high-rise buildings, etc., but the lower the floors in a high-rise building, the greater the amount of water collected from the drainage water from each floor, so the joints are required to have high drainage performance capable of discharging large amounts of wastewater, such as 7 L / s or more.In addition, the joints are required to not break the water seal even when a large amount of wastewater is discharged.

[0005] While cast iron joints, which are easy to manufacture, have been known to have the high drainage performance described above, it has been difficult to provide resin joints with high drainage performance due to size restrictions imposed by injection molding and the inability to mold them into complex shapes.

[0006] In view of the above circumstances, an object of the present invention is to provide a joint having high drainage performance. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention proposes the following aspects. "1" The joint of this form is a joint to be installed in a through-hole provided in the floor slab of a building, and comprises a vertical pipe connection portion to be connected to a vertical pipe extending from an upper floor, a collecting portion having a horizontal pipe connection portion to be connected to a horizontal pipe, a lower connection portion to be connected to a vertical pipe extending from a lower floor, and an intermediate portion that connects the collecting portion and the lower connection portion and has an inner diameter larger than that of the vertical pipe, and is characterized in that at least the intermediate portion is embedded in the through-hole of the floor slab, and either the collecting portion, the intermediate portion, or the lower connection portion is made of resin, and a first swivel member is provided inside either the collecting portion or the intermediate portion, and a second swivel member is provided inside the lower connection portion.

[0008] If an intermediate section with a larger inner diameter and larger internal volume than the vertical pipe is placed below the collecting section, the wastewater that passes through the collecting section to which the horizontal pipe is connected can be introduced into the intermediate section with a larger internal volume and flowed there, thereby improving drainage performance. If a large amount of wastewater flows into the collection section from the vertical drainage pipe on the upper floor or the horizontal pipe, the large amount of wastewater can be directed to the middle section with a larger internal volume, and then directed to the vertical drainage pipe on the lower floor from the lower connection section.

[0009] [2] In the joint according to this embodiment, a configuration can be adopted in which a swivel member is provided inside each of the collection portion and the intermediate portion.

[0010] A portion of the wastewater flowing down from the collection section can be received by the swirling member and swirled to generate a swirling flow. This portion of the wastewater can be made into a swirling flow, straightened, and then guided downward. For example, if the swirling member guides the wastewater downward while swirling it, the reflected flow of the wastewater can be prevented from flowing back into the horizontal pipe. This results in the joint having excellent drainage performance.

[0011] [3] In the joint according to this embodiment, a configuration can be adopted in which a thermal expansion material is wrapped around the outer periphery of the intermediate portion.

[0012] When heat from a fire or other source is applied to the thermal expansion material, it expands and closes the through-holes in the floor slab. Also, when the thermal expansion material expands to close the through-holes, it prevents the joints from falling off due to melting during a fire. This prevents smoke and flames from the floor below from easily spreading to the floors above, effectively preventing the spread of fire.

[0013] "4" In the joint of this embodiment, the upper part of the intermediate part can be a socket into which the lower part of the assembly part is inserted, and the lower part of the intermediate part can be a spigot into which the upper part of the lower connecting part is inserted.

[0014] By fitting the lower part of the assembly part into the socket at the top of the middle part, the assembly part and middle part can be joined together, creating a joint that does not create a step that would cause drainage resistance at the joint.By fitting the lower part of the middle part as a spigot into the top of the lower connecting part, the middle part can be joined together with the lower connecting part, creating a joint that does not create a step that would cause drainage resistance at the joint. Therefore, when drainage water flows from the collecting section through the intermediate section to the lower connecting section, the drainage can be performed smoothly without increasing drainage resistance at the joint section, ensuring good drainage performance.

[0015] [5] In the pipe joint according to this embodiment, a sound insulating cover may be wrapped around the outer periphery of the intermediate portion, and the outer diameter of the intermediate portion around which the sound insulating cover is wrapped may be 175 to 190 mm.

[0016] Since the outer periphery of the middle part is covered with a sound-insulating cover, even if wastewater from the collection part flows into the middle part, it is possible to provide a configuration that has excellent sound insulation and makes it difficult for drainage noise to leak to the outside. If the outer diameter of the middle section is 175 to 190 mm, it is a size that makes it easy to install filler material when inserting the joint into a through hole formed in a building and burying it with filler material such as mortar. In addition, since the wastewater that passes through the collecting section can be introduced and flowed into the middle section with a large internal volume of the above size, drainage performance can be reliably improved. [Effects of the Invention]

[0017] According to this form of fitting, since it has an intermediate section with an inner diameter larger than the inner diameter of the vertical pipe, the internal volume of the section where wastewater flows from the collecting section where the horizontal pipe is connected to the intermediate section is large, and a fitting can be provided with excellent drainage capacity in the section from the collecting section to the intermediate section. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a cross-sectional view showing a structure in which a joint according to a first embodiment of the present invention is installed in a floor slab. [Figure 2] FIG. 10 is a perspective view showing an example of a swivel member applied to an intermediate portion of the joint. [Figure 3] FIG. 10 is a perspective view showing a second example of a swivel member applied to a lower part of the joint. [Figure 4] FIG. 10 is a perspective view showing a third example of a swivel member applied to the lower part of the joint. [Figure 5] FIG. 4 is a cross-sectional view showing a joint according to a second embodiment of the present invention. [Figure 6] FIG. 10 is a cross-sectional view showing a joint according to a third embodiment of the present invention. [Figure 7] FIG. 10 is a cross-sectional view showing a joint according to a fourth embodiment of the present invention. [Figure 8] FIG. 10 is a cross-sectional view showing a joint according to a fifth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] A joint according to a first embodiment of the present invention will be described below with reference to FIG. The joint 1 according to this embodiment is a drainage pipe joint that is applied to a drainage facility 2 in an apartment building or other collective housing unit, an office building, or the like. As shown in Figure 1, the drainage equipment 2 has joints 1 installed on each floor, vertically penetrating the floor slab S that separates the upper and lower floors of a building such as an apartment building or a building. Also provided are vertical drainage pipes 5 made of resin that connect the joints 1 on each floor, and horizontal pipes (horizontal drainage branch pipes) 6 made of resin that are piped on the floor of each floor and connected to the joints 1 on each floor. The drainage equipment 2 is constructed by stacking the drainage vertical pipe 5 on the lower floor into the upper receiving port of the joint on the lower floor, inserting the lower end of the joint 1 on the upper floor into the upper spigot of the drainage vertical pipe 5 to connect it, and then connecting the lower end of the drainage vertical pipe 5 extending to the upper floor to the upper spigot of the joint 1.

[0020] The joint 1 has a collecting section 12 which has a cylindrical vertical pipe connection section 10 connected to a vertical drainage pipe 5 extending to the upper floor, and a cylindrical horizontal pipe connection section 11 connected to a horizontal pipe 6. The joint 1 also has an intermediate section 13 connected to the lower part of the collecting section 12, and a lower connecting section 15 connected to the vertical drainage pipe 5 extending to the lower floor. In joint 1, any of collection section 12, intermediate section 13, and lower connecting section 15 is made of a molded resin body. A first swirl member (first swirl blade) 16 is provided inside collection section 12, a second swirl member (second swirl blade) 17 is provided inside lower connecting section 15, and a third swirl blade 14 is provided inside intermediate section 13.

[0021] The joint 1 of this embodiment is installed, for example, at a portion where a through-hole 19 that passes through a floor slab S in the vertical direction is formed, as shown in FIG. The vertical pipe connection portion 10 is connected to a cylindrical upper connection portion 18 provided at the top of the collection portion 12, and is the portion to which the lower end spigot of the vertical drainage pipe 5 extending to the upper floor is connected via an upper receiving member 20. The upper receiving member 20 has a cylindrical peripheral wall portion 21, and a large-diameter portion 22 is formed on the upper side of this peripheral wall portion 21. The upper receiving member 20 is attached to the collection portion 12 by fitting the lower end of the peripheral wall portion 21 into the upper connection portion 18 of the collection portion 12. A ring-shaped seal member 24 made of an elastic material such as rubber is attached to the inner periphery of the large-diameter portion 22. An inner flange-type vertical pipe receiving portion 25 is formed on the inner lower side of the peripheral wall portion 21 of the upper receiving member 20, and this vertical pipe receiving portion 25 is configured to support the lower end of the vertical drainage pipe 5 on the upper floor side.

[0022] As shown in FIG. 1, one or more (two in the example of FIG. 1) horizontal pipe connection sections 11 are formed on the side of the collecting section 12, into which horizontal pipes 6 are inserted and connected. The horizontal pipe connection section 11 has a cylindrical section 11a and an inner flange section 11b formed on the inner periphery of the tip of the cylindrical section 11a. The horizontal pipe 6 is inserted into the horizontal pipe connection section 11 on the right side shown in FIG. 1 via a cylindrical horizontal pipe joint member (bush) 11A. A ring-shaped seal member 27 is inserted into the inner periphery of this horizontal pipe joint member 11A. The horizontal pipe 6 is inserted into the horizontal pipe joint member 11A via the seal member 27, and the horizontal pipe joint member 11A is fixed to the cylindrical section 11a by adhesive or other means. In the installed state shown in FIG. 1, the horizontal pipe connection section 11 and horizontal pipe 6 are positioned directly above the floor slab S. In the example shown in Figure 1, cylindrical portions 11a are formed on both the left and right sides of the collection section 12, but the left cylindrical portion 11a is closed by a cover plate 26, and the horizontal pipe 6 is connected only to the right cylindrical portion 11a.

[0023] A vertical rib 12b is formed on the inner periphery of the collecting section 12 at a position adjacent to the part where the horizontal pipe 6 is connected. This vertical rib 12b is a member that prevents wastewater that has flowed into the collecting section 12 from a specific horizontal pipe 6 from flowing back into other horizontal pipes. A spigot 12A is formed below the portion of the collecting section 12 to which the horizontal pipe connecting section 11 is connected. The spigot 12A is formed in a cylindrical shape with a diameter larger than that of the upper connecting section 18.

[0024] Below the assembly part 12, a cylindrical intermediate part 13 is installed so as to pass through the through hole 19 of the floor slab S from top to bottom. The intermediate section 13 has a main body 13a with a uniform inner diameter, and a cylindrical socket 13b with a diameter slightly larger than that of the main body 13a formed at the upper end of the main body 13. The intermediate section 13 is integrally connected to the lower part of the collecting section 12 by inserting the spigot 12A of the collecting section 12 into this socket 13b. The inner diameter of the main body 13a in the intermediate section 13 is uniform, and this inner diameter is the same as the inner diameter of the spigot 12A of the collecting section 12. Further, a third swirl vane 14 is provided at the center of the inner surface of the intermediate portion 13, and is inclined so as to intersect with the axis of the intermediate portion 13.

[0025] Most of the middle portion 13 is configured to be embedded in the through-hole 19 of the floor slab S. In addition, the middle portion 13 is embedded in the through-hole 19 by a filler 29 such as mortar that is filled into the through-hole 19 of the floor slab S with the spigot 13c at its lower end slightly protruding below the floor slab S. A thermal expansion material 35 is wound around the outer periphery of the intermediate portion 13 at a portion that is located inside the through hole 19 so as to cover the outer periphery of the intermediate portion 13 . The thermal expansion material 35 is made of a graphite-based thermal expansion material or the like. As an example, the thermal expansion material 35 is made of a thermally expandable fire-resistant sheet such as thermally expandable graphite whose thermal expansion start temperature is set to 240°C or higher, and expands in the event of a fire to block the through-holes 19 in the floor slab S. In addition, the expansion of the thermal expansion material 35 can prevent the joint 1 from falling off due to melting during a fire. The thermal expansion material 35 is preferably provided at a position that does not interfere with the step at the portion where the receiving port 13b is provided.

[0026] A first sound-insulating cover 36 having a two-layer structure is wound around the outer periphery of the middle portion 13. The first sound-insulating cover 36 has an inner layer a made of a sound-absorbing material such as rock wool and an outer layer b made of a sound-insulating material such as EPDM (ethylene propylene diene rubber). The inner layer a may have a two-layer structure in which the outer layer b is made of a fire-resistant material such as fiber-mixed mortar and a sound-insulating sheet. The outer layer b made of a sound-insulating sheet does not have to be provided. The outer diameter of the main body 13a of the intermediate portion 13, including the first sound-insulating cover 36, is preferably in the range of 175 to 190 mm, and more preferably in the range of 180 to 186 mm. An outer diameter in this range has the characteristic that it is easy to fill a through-hole 19 of a general inner diameter formed in a slab S of a building with mortar or other filler material.

[0027] The lower connecting portion 15 is a member that constitutes the lower portion of the joint 1, and is integrally molded from top to bottom with a cylindrical socket 15a, a large diameter cylindrical portion 15b, a tapered portion 15c, and a small diameter cylindrical portion 15d. The inner diameter of the socket 15 a is set to be approximately equal to the outer diameter of the spigot 13 c of the intermediate portion 13 .

[0028] The tapered section 15c is a section in which the tube body is gradually narrowed so that the diameter becomes smaller at the bottom without changing the wall thickness dimension, and its axial length is longer than that of the large diameter cylindrical section 15b, and it is positioned so as to protrude a predetermined length below the floor slab S. As shown in Figure 1, small-diameter cylindrical portion 15d is the portion into which the upper end of vertical drainage pipe 5 extending to the floor below is inserted and connected. The upper end of spigot pipe 30 is fitted into small-diameter cylindrical portion 15d and fixed by adhesive or other means. A stopper portion 15f with a reduced inner diameter is formed where tapered portion 15c and small-diameter cylindrical portion 15d are connected, and the upper end of spigot pipe 30 is positioned by contacting stopper portion 15f. The lower end of the spigot pipe 30 is fitted into the upper end of the vertical drainage pipe 5 extending to the floor below.

[0029] The first swirl vanes 16 are formed to protrude inward from the peripheral wall of the collecting section 12 and extend at an angle relative to the central axis of the collecting section 12. The first swirl vanes 16 are provided to receive a portion of the wastewater flowing down from the vertical drainage pipes 5 and swirl it along the first swirl vanes 16 to generate a swirling flow. The first swirl vanes 16 are preferably installed in a position where the upper surface of the vanes (the surface that the wastewater hits) is in a blind spot when viewing the connection portion of the horizontal pipes 6 from outside the collecting section 12. By positioning the first swirl vanes 16 in this manner, when a cleaning tool is inserted through the horizontal pipes 6 for cleaning, the cleaning tool is prevented from climbing upstream by the first swirl vanes 16. In FIG. 1, the first swirl vanes 16 and the horizontal pipes 6 are positioned as described above. The second swirl vanes 17 are formed so as to extend obliquely in an up-down direction inside the lower connection part 15. The second swirl vanes 17 generate a swirling flow in a portion of the wastewater flowing through the lower connection part 15, thereby rectifying the wastewater and improving drainage performance.

[0030] In the joint 1, a second sound-insulating cover 37 is provided below the first sound-insulating cover 36. The second sound-insulating cover 37 has a two-layer structure combining an inner layer a made of a sound-absorbing material such as rock wool and an outer layer b made of a sound-insulating material such as EPDM (ethylene propylene diene rubber). The inner layer a may also have a two-layer structure combining an outer layer b made of a fire-resistant material such as fiber-mixed mortar and a sound-insulating sheet. The outer layer b made of a sound-insulating sheet does not have to be provided. In the example shown in FIG. 1, the upper end of the second sound-insulating cover 37 is disposed so as to cover the lower end of the intermediate portion 13 and the socket 15a thereunder. In this example, the lower end of the first sound-insulating cover 36 and the upper end of the second sound-insulating cover 37 are butted together, and the part of the outer layer b covering the lower end of the inner layer a of the first sound-insulating cover 36 is butted together with the outer layer b covering the upper end of the inner layer a of the second sound-insulating cover 37. The lower end of the first sound insulating cover 36 and the upper end of the second sound insulating cover 37 may be configured to overlap each other.

[0031] The joint 1 covered with the first and second sound-insulating covers 36, 37 passes through the through-hole 19 of the floor slab S and is attached to the floor slab S so that the thermal expansion material 35 is disposed inside the through-hole 19. More specifically, the joint 1 is attached to the floor slab S with the socket 13b of the intermediate part 13 positioned slightly below the upper end of the through-hole 19 and the lower end of the intermediate part 13 protruding slightly below the floor slab S. In this state, the intermediate part 13 is embedded in the through-hole 19 with a filler 29 such as mortar that is filled in the through-hole 19 so as to fill the through-hole 19 around the joint 1.

[0032] As shown in Figure 1, a joint 1 attached to the floor slab S is provided to connect a vertical drainage pipe 5 extending to the upper floor with a vertical drainage pipe 5 extending to the lower floor, and the drainage water from each floor flows into a collection section 12 via a horizontal pipe 6. Wastewater from the upper floors flows into the collecting section 12 of the joint 1 from the vertical drainage pipe 5 extending to the upper floor, but because the first swirl vane 16 is installed inside the collecting section, part of the wastewater is made into a swirling flow, straightened, and guided downward. For example, when the first swirl vane 16 guides the wastewater so that it flows downward while swirling, it is possible to prevent the reflected flow of the wastewater from flowing back into the horizontal pipe. Therefore, the joint 1 has excellent drainage performance.

[0033] In the joint 1, the intermediate section 13 is cylindrical and has the same inner diameter as the collecting section 12, and wastewater flowing in from the vertical drainage pipe 5 on the upper floor side passes through the collecting section 12, which has a larger inner diameter than the vertical drainage pipe 5, and further reaches the internal space of the intermediate section 13. The intermediate section 13 has a larger diameter than the vertical drainage pipe 5 and the internal space volume of the intermediate section 13 is sufficiently large, so providing the intermediate section 13 ensures sufficient volume for the wastewater outlet section of the joint 1, and therefore the joint 1 has high drainage performance. For example, even if a large amount of wastewater flows from the vertical drainage pipe 5 into the collecting section 12 and the intermediate section 13, the insides of the collecting section 12 and the intermediate section 13 are unlikely to become negative pressure, so drainage is not hindered and the drainage is excellent.

[0034] Furthermore, no reduced diameter section is formed below the collecting section 12, allowing wastewater to flow up to the lower connection section 15 while maintaining the same inner diameter. If a reduced diameter section were formed below the collecting section 12, the wastewater from the horizontal pipes 6 and the wastewater from the vertical drainage pipes 5 would mix in the collecting section 12, increasing the amount of wastewater and making the collecting section 12 prone to becoming a region that could become full. For this reason, depending on the full-water state, an abnormal negative pressure region or positive pressure region could be created below the collecting section 12, which could cause problems with drainage. Therefore, by making the lower part of the collecting section 12 a region with a larger internal volume while maintaining the same inner diameter, drainage can be improved compared to a configuration with a reduced diameter section. The main part of the joint 1 has a divided structure consisting of two components, the assembly part 12 and the intermediate part 13, and is therefore made from a molded resin body. This means that there are few shape restrictions when molding each part, making it easy to manufacture.

[0035] For example, if the collecting portion 12 and the intermediate portion 13 of the fitting 1 are integrally molded, it may be impossible to mold the collecting portion 12 and the intermediate portion 13 into complex shapes due to limitations on the molding process. This would impose limitations on the shapes of the collecting portion 12 and the intermediate portion 13 obtained as molded products, which may hinder molding of shapes capable of handling large amounts of wastewater, such as 7 L / s or more. In this regard, molding the collecting portion 12 and the intermediate portion 13 as separate products increases the flexibility in molding them individually. Furthermore, if the outer diameter of the intermediate portion 13 is set to a sufficient inner diameter, such as 175 to 190 mm, this, combined with the configuration without a tapered portion as described above, can provide a configuration capable of handling large amounts of wastewater, such as 7 L / s or more.

[0036] The joint 1 shown in Figure 1 is provided with an upper receiving member 20, and the portion that receives the vertical drainage pipe 5 on the upper floor side is covered with a sealing member 24, so that the portion that receives the vertical drainage pipe 5 on the upper floor side is less likely to leak.

[0037] In the case of the joint 1 shown in Figure 1, when a fire breaks out on a floor below the floor slab S, the heat of the fire causes the thermal expansion material 35 to expand, preventing the joint 1 from melting and falling, and the thermal expansion material 35 also blocks the internal space of the lower connection part 15. This prevents flames, smoke, etc. from passing through the internal space of the joint 1 and rising to floors above the floor slab S. Therefore, the joint 1 is able to exhibit fire resistance.

[0038] In a building, wastewater collected in horizontal pipe 6 flows into joint 1. When the flow rate is high, the wastewater occupies most of the space inside horizontal pipe 6, but when the flow rate is low, the wastewater flows along the lower end of horizontal pipe 6. For example, in Fig. 1, wastewater that flows from the horizontal pipe 6 into the collecting section 12 of the joint 1 hits the vertical rib 12b and is guided downward, preventing the wastewater from flowing back into other horizontal pipes. For example, wastewater that flows downward through the vertical drainage pipe 5 is treated appropriately by wastewater treatment equipment (not shown).

[0039] The joint 1 shown in Fig. 1 has excellent sound insulation properties because it is covered with a first sound-insulating cover 36 and a second sound-insulating cover 37. For example, even if drainage water passes through the inside, the structure makes it difficult for the drainage noise to leak out. Furthermore, the first sound-insulating cover 36 is attached to the outer surface of the intermediate section 13, and the second sound-insulating cover 37 is attached to the outer surface of the lower connecting section 15. Therefore, the first sound-insulating cover 36 can be fastened to the outer surface of the intermediate section 13, and the second sound-insulating cover 37 can be fastened to the outer surface of the lower connecting section 15. Because the first sound-insulating cover 36 and the second sound-insulating cover 37 can be fastened and attached individually, they can be tightly attached individually and their individual positions can be finely adjusted. This prevents deformation and deflection of the sound-insulating covers.

[0040] In the joint 1 shown in Figure 1, the assembly portion 12, the intermediate portion 13, and the lower connecting portion 15 are arranged in the order of spigot and socket from top to bottom. That is, the socket 13b of the intermediate portion 13 is provided outside the spigot 12A of the assembly portion 12, and the socket 15a of the lower connecting portion 15 is arranged outside the spigot 13c of the intermediate portion 13. With the above configuration, the inner diameter of the spigot 12A of the collection section 12, the inner diameter of the main body 13a of the intermediate section 13, and the inner diameter of the large-diameter cylindrical section 15b are made approximately the same, so they can be connected without any steps. A connection without any steps prevents problems such as increased drainage resistance due to the wastewater hitting a step. In the configuration of Figure 1, the inner diameter of the large-diameter cylindrical section 15b is slightly larger than the inner diameter of the main body 13a, but the step that occurs at the joint between the spigot 13c of the intermediate section 13 and the large-diameter cylindrical section 15b is a downward step and does not affect the flow of wastewater.

[0041] In the coupling 1 of the first embodiment shown in Figure 1, first swirl vanes 16 are provided inside the collecting section 12. However, in addition to the first swirl vanes 16, deflection vanes may be provided so as to protrude diagonally upward and downward from the inner surface of the peripheral wall of the collecting section 12. In addition to the first swirl vanes 16, deflection vanes may be used to generate a swirling flow or deflection in the flow of wastewater, thereby rectifying and smoothing the flow of wastewater. Furthermore, if deflection vanes are provided, the first swirl vanes 16 may be omitted.

[0042] FIG. 2 shows another example of the structure of the first swirl vane 16 provided in the collecting portion 12 in the joint 1 shown in FIG. In the structure shown in FIG. 2, a recess 12d is formed inward in a part of the peripheral wall of the collecting portion 12, thereby forming a first swirl vane 38 on the inner surface side of the collecting portion 12. The first swirl vane 38 may be configured integrally with the collecting portion 12 or may be configured separately from the collecting portion 12.

[0043] FIG. 3 shows a second structural example of the second swirl vane 17 provided at the lower connecting portion 15 in the joint 1 shown in FIG. The structure shown in Figure 3 shows an example in which a recess 39 recessed inward is formed in a part of the wall portion constituting the tapered portion 15c of the lower connecting portion 15, thereby forming the second swirl vane 17 inside the tapered portion 15c. The second swirl vane 17 may be integral with the lower connection portion 15 or may be a separate member.

[0044] FIG. 4 shows an interior member as a swiveling member that is desirable when placed inside the lower connection part 15. This interior member 45 has a structure that can slow down and swirl the drainage water flowing down. The interior member 45 is composed of a cylindrical portion 46 , a deceleration guide 47 formed below the cylindrical portion 46 with a phase shift of 180°, and a turning guide 48 . 5, the cylindrical portion 46 of the interior member 45 is made up of a cylindrical main body 46a that fits into the large diameter cylindrical portion 15b, a reduction guide support portion 46b that supports the reduction guide 47, and a swivel guide support portion 49 that supports the swivel guide 48. The swivel guide 48 is equipped with a plurality of blade members 48a, and these blade members 48a generate a swirling flow in the wastewater.

[0045] FIG. 5 shows a second embodiment of a joint according to the present invention. The joint 50 of the second embodiment has a configuration substantially equivalent to that of the joint 1 of the first embodiment, but differs in that the horizontal pipe 6 is connected to the cylindrical portion 11a of the horizontal pipe connecting portion 11 via an inclined portion 11c that is inclined obliquely upward. The other configurations are equivalent to those of the first embodiment. An inclined portion 11c extends integrally from the cylindrical portion 11a of the collecting portion 12, a second cylindrical portion 11d is formed at the tip of the inclined portion 11c, and the horizontal pipe 6 is connected to the second cylindrical portion 11d via the horizontal pipe joint member 11A. Because of the inclined portion 11c, the second cylindrical portion 11d is installed at a position slightly higher than the cylindrical portion 11a, and the horizontal pipe (not shown) connected to the inclined portion 11c is connected to the collecting portion 12 at a position slightly higher than the base end side of the inclined portion 11c.

[0046] The inclined portion 11c allows the wastewater to flow diagonally downward when it flows from the horizontal pipe 6 into the collecting section 12, and the wastewater from the horizontal pipe 6 can be smoothly introduced into the intermediate section 13. Therefore, there is less risk that the wastewater from the horizontal pipe 6 will block the bottom side of the collecting section 12, and there is less risk that the flow of wastewater from the vertical drainage pipe 5 will be blocked.

[0047] It is not necessary to make the horizontal pipe perpendicular to the axis of the cylindrical portion 11a as in the second embodiment shown in FIG. 5, and the connecting portion of the horizontal pipe may be connected to the cylindrical portion 11a so as to have a bent axis. The joint 50 of the second embodiment has other configurations similar to those of the joint 1 of the first embodiment, so the same components are given the same reference numerals and their description will be omitted. Regarding other operational effects, the joint 50 of the second embodiment can obtain operational effects equivalent to those of the joint 1 of the first embodiment.

[0048] 6 shows a third embodiment of a joint according to the present invention, and a joint 60 of this third embodiment has a configuration substantially equivalent to that of the joint 1 of the first embodiment, except that the sound-insulating cover 61 wrapped around the outer periphery of the intermediate portion 13 and the outer periphery of the lower connecting portion 15 has a two-layer structure consisting of an inner layer 61a made of fire-resistant mortar and an outer layer 61b made of fire-resistant sheet. The rest of the configuration is equivalent to that of the first embodiment. A sound insulating cover 61 having an inner layer 61a of fireproof mortar may be provided as shown in Fig. 6. When the inner layer 61a of fireproof mortar is provided, the outer layer 61b in the tapered portion 15c may be omitted.

[0049] In the configuration shown in FIG. 6, the configuration having an inner layer 61a of fire-resistant mortar and an outer layer 61b of fire-resistant sheet is excellent in both sound insulation and fire resistance.

[0050] FIG. 7 shows a fourth embodiment of a joint according to the present invention. The joint 70 of the fourth embodiment has a configuration substantially equivalent to that of the joint 1 of the first embodiment, but differs in the following points: (1) the collecting portion 12 and the intermediate portion 13 are integrally molded, and (2) the first sound-insulating cover 36 and the second sound-insulating cover 37 are integral. The other configurations are equivalent to those of the first embodiment. In the joint 70 of the fourth embodiment, the lower end 12c of the collecting portion 12 (the portion that was the spigot 12A of the collecting portion 12) in the joint 1 of the first embodiment and the upper end of the intermediate portion 13 are connected to each other. Furthermore, in this joint 70, the intermediate portion 13 and the lower connecting portion 15 are covered by a third sound-insulating cover 71. The third sound-insulating cover 71 is formed by integrally forming the first sound-insulating cover 36 and the second sound-insulating cover 37. Like the first sound-insulating cover 36 and the second sound-insulating cover 37, the third sound-insulating cover 71 has an inner layer a and an outer layer b. The third sound-insulating cover 71 may be divided into the first sound-insulating cover 36 and the second sound-insulating cover 37. In this case, for example, a configuration in which the third sound-insulating cover 71 is divided into the first sound-insulating cover 36 and the second sound-insulating cover 37 at the socket 15a of the lower connecting portion 15 can be adopted. This configuration can also be adopted in a joint 80 of a fifth embodiment described later. The joint 70 of the fourth embodiment has other configurations similar to those of the joint 1 of the first embodiment, so the same components are given the same reference numerals and their description will be omitted. Regarding other operational effects, the joint 70 of the fourth embodiment can obtain operational effects equivalent to those of the joint 1 of the first embodiment.

[0051] FIG. 8 shows a fifth embodiment of a joint according to the present invention. The joint 80 of the fifth embodiment has a configuration substantially equivalent to that of the joint 70 of the fourth embodiment, but differs in the following points: (1) a water-stopping rubber sheet 81 (water-stopping sheet, rubber ring) is provided, and (2) a vibration-damping rubber sheet 82 (vibration-damping rubber ring, vibration-damping sheet, vibration-damping ring) is provided. The other configurations are equivalent to those of the fourth embodiment.

[0052] The water-stop rubber sheet 81 is a rubber ring that straddles the outer surface of the upper end of the outer layer b of the third sound-insulating cover 71 (or the first sound-insulating cover 36) and the outer surface of the lower end 12c of the collecting portion 12. The water-stop rubber sheet 81 prevents water from seeping in between, for example, the third sound-insulating cover 71 (or the first sound-insulating cover 36) and the lower end (spigot 12A) or the intermediate portion 13 of the collecting portion 12. In this embodiment, the water-stop rubber sheet 81 has a two-stage cylindrical shape. The upper stage of the water-stop rubber sheet 81 has a smaller diameter than the lower stage, and is fitted into the lower end 12c of the collecting portion 12. The lower stage of the water-stop rubber sheet 81 is fitted into the upper end of the third sound-insulating cover 71 (or the first sound-insulating cover 36). It is also possible to use a double-ring configuration (double rubber rings) placed inside and outside the upper end of the third sound insulating cover 71 (or first sound insulating cover 36) as the water-stopping rubber sheet 81. In this case, the double rubber rings sandwich the upper end of the third sound insulating cover 71 (or first sound insulating cover 36) in the radial direction.

[0053] The vibration-damping rubber sheet 82 is disposed on the outer peripheral surface of the intermediate portion 13. The vibration-damping rubber sheet 82 suppresses vibration of the joint 80 due to, for example, impacts from drainage received by the third swirl vane 14. The vibration-damping rubber sheet 82 is annular and is provided around the entire circumference of the intermediate portion 13. The vibration-damping rubber sheet 82 is disposed between the intermediate portion 13 and the thermal expansion material 35. The vibration-damping rubber sheet 82 and the thermal expansion material 35 are layered in this order on the outer peripheral surface of the intermediate portion 13 from the inside to the outside in the radial direction. The outer diameter of the portion of the joint 80 where the vibration-damping rubber sheet 82 and the thermal expansion material 35 are disposed (the outer diameter of the thermal expansion material 35) is equal to or smaller than the outer diameter of the socket 15a of the lower connection portion 15. The joint 80 of the fifth embodiment has other configurations similar to those of the joint 70 of the fourth embodiment, so the same components are denoted by the same reference numerals and their description will be omitted. Regarding other operational effects, the joint 80 of the fifth embodiment can obtain operational effects equivalent to those of the joint 70 of the fourth embodiment.

[0054] Although each embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration of the present invention is not limited to these embodiments, and the present invention also includes changes, combinations, deletions, etc. of the configuration within the scope that does not deviate from the gist of the present invention. [Explanation of symbols]

[0055] S...floor slab, 1...joint, 2...drainage equipment, 5...vertical drainage pipe, 6...horizontal pipe (horizontal drainage branch pipe), 10...vertical pipe connection part, 11...horizontal pipe connection part, 12...collection part, 12A...spigot, 13...intermediate part, 13b...receptacle, 13c...spigot, 15...lower connection part, 15a...receptacle, 16...first swirl blade (first swirl member), 17...second swirl blade (second swirl member), 19...through hole, 20...upper receptacle member, 36...first sound-insulating cover, 37...second sound-insulating cover, 50, 60...joints.

Claims

1. A joint to be installed in a through hole provided in a floor slab of a building, a vertical pipe connection portion connected to a vertical pipe extending from an upper floor; a collecting section having a horizontal pipe connecting section to be connected to the horizontal pipe; a lower connection part that is connected to a vertical pipe extending from the lower floor; an intermediate portion that connects the collecting portion and the lower connecting portion and has an inner diameter larger than that of the vertical pipe; Equipped with the assembly portion, the intermediate portion, and the lower connection portion are made of resin, a first pivot member is provided inside the collection portion; a second pivot member is provided inside the lower connection portion; The first rotating member is integral with the assembly portion, A joint in which a recess is provided on an outer surface of the collecting portion at a position where the collecting portion overlaps with the first rotating member in the axial direction and where the recess corresponds to the first rotating member.

2. The intermediate portion is molded separately from the collection portion, an upper portion of the intermediate portion is a receiving port into which a lower portion of the assembly portion is inserted; 2. The coupling of claim 1, wherein the lower portion of the intermediate portion is a spigot that is inserted into the upper portion of the lower connecting portion.

3. a step is provided on the outer surface of the intermediate portion of the portion where the receiving port is provided, 3. The joint according to claim 2, wherein a thermal expansion material is provided on the outer periphery of the intermediate portion below the step.

4. The joint according to claim 1 , wherein the intermediate portion is integrally molded with the collecting portion.

5. the lower connection portion has a socket into which a lower end of the intermediate portion is inserted, 5. The joint according to claim 4, wherein a thermal expansion material is provided on the outer periphery of said intermediate portion above an upper end of the socket of said lower connection portion.

6. a sound-insulating cover that covers the intermediate portion and the lower connection portion; the sound-insulating cover is composed of a first sound-insulating cover covering the intermediate portion and a second sound-insulating cover covering the lower connection portion, The joint according to claim 1 , wherein an upper end of the second sound-insulating cover covers a lower end of the intermediate portion.

7. a sound-insulating cover that covers the intermediate portion and the lower connection portion; the sound-insulating cover is composed of a first sound-insulating cover covering the intermediate portion and a second sound-insulating cover covering the lower connection portion, The joint according to claim 1 , wherein an upper end of the first sound-insulating cover covers a lower end of the collection portion.

8. a sound-insulating cover that covers the collection portion, the intermediate portion, and the lower connection portion; The sound-insulating cover is integral with the The joint according to claim 1 , wherein an upper end of the sound-insulating cover covers a lower end of the collection portion.

9. 9. A joint according to claim 1, wherein a vibration-damping rubber sheet is disposed on an outer peripheral surface of said intermediate portion.

10. the collecting section includes a plurality of horizontal pipe connecting sections, One of the horizontal pipe connection portions is provided with a horizontal pipe joint member into which the horizontal pipe is inserted, 10. A joint according to claim 1, wherein the other horizontal pipe connection portion is provided with a cover plate.

11. 11. The joint according to claim 1, further comprising an inclined portion inclined obliquely upward with respect to a central axis of the horizontal pipe connecting portion, between the horizontal pipe and the horizontal pipe.

12. A vertical pipe and Horizontal pipe and A drainage system comprising: a joint according to any one of claims 1 to 11 connected to the vertical pipe and the horizontal pipe and installed in a through hole provided in a floor slab of a building.

13. A building comprising the drainage system according to claim 12.

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