JP7741707B2 - Fittings, drainage systems, buildings - Google Patents

Description

The present invention relates to a joint.

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 an upper body made of resin and equipped with a socket to which the drain pipe of the upper floor is connected, an upper end connection part that is embedded in the floor slab and connected to the lower end of the upper body, and a lower body that protrudes downward from the ceiling surface of the floor slab and equipped with 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 is equipped with vanes that guide the drainage water flowing down.

JP 2014-58849 A

The above-mentioned drainage pipe fittings are used in high-rise buildings, etc., but since the amount of water collected from each floor increases the lower the floor, the higher the drainage capacity of the high-rise building. Therefore, the fittings must have high drainage performance, capable of discharging large amounts of wastewater, such as 7 L/s or more. Furthermore, even when large amounts of wastewater are discharged, the fittings must not break down their seal.

Conventionally, cast iron joints, which are easy to manufacture, have been known to have the high drainage performance described above. However, resin joints are injection molded, which imposes size restrictions and makes it impossible to mold them into complex shapes, making it difficult to provide joints with high drainage performance.

In light of the above-mentioned circumstances, the present invention aims to provide a fitting with high drainage performance.

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

In this embodiment, the upper tubular portion has an inner diameter larger than the inner diameter of the vertical pipe extending from the upper floor, so the internal volume of the portion where wastewater flows from the vertical pipe to the joint is large, providing excellent drainage capacity in the portion from the vertical pipe to the joint.

"2" In the joint of this embodiment, a configuration can be adopted in which a swivel member is provided inside each of the upper tubular portion and the assembly portion.

A portion of the wastewater flowing down from the vertical pipe 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 directed downward. For example, if the swirling member is used to swirl the wastewater while directing it downward, the reflected flow of the wastewater can be prevented from flowing back into the horizontal pipe. This results in the fitting having excellent drainage performance.

"3" In the fitting of this embodiment, the upper part of the upper tubular portion can be a socket into which the lower part of the vertical pipe connection portion is inserted, and the lower part of the upper tubular portion can be a spigot into which the upper part of the assembly portion is inserted.

By fitting the vertical pipe connection part into the socket of the upper tubular part, the upper tubular part and the vertical pipe connection part can be joined together, and the vertical pipe can be joined to the upper tubular part. By fitting the lower part of the upper tubular part as a spigot into the top of the collecting part, the upper tubular part can be joined to the collecting part as a whole, and drainage water from the vertical pipe can be directed to the upper tubular part and collecting part, which have a larger internal volume.

"4" The joint of this embodiment can be configured to include a first sound-insulating cover covering the outer surface of the upper tubular portion and a second sound-insulating cover covering the outer surface of the assembly portion.

By covering the outer surface of the upper tubular section with a first sound-insulating cover and the outer surface of the collecting section with a second sound-insulating cover, a structure can be realized that has excellent sound insulation properties and is less likely to leak drainage noise to the outside, even when wastewater from the vertical pipe flows into the upper tubular section or the collecting section.
Since the first sound insulating cover and the second sound insulating cover are provided separately, they can be fastened separately and attached separately. Because they can be fastened separately, the position of each sound insulating cover can be finely adjusted, preventing deformation and bending of the sound insulating covers.

"5" In the pipe fitting of this embodiment, the first sound-insulating cover and the second sound-insulating cover may be configured so that their end faces face each other.

By arranging the end faces of the first and second sound-insulating covers so that they face each other, it is possible to eliminate overlapping areas between the first and second sound-insulating covers, resulting in a configuration with minimal protruding parts on the outer surface of the joint.

"6" The pipe fitting according to this embodiment may be configured with a sound-insulating cover that covers the outer surfaces of the upper tubular portion and the assembly portion.

By combining the first and second sound-insulating covers into a single sound-insulating cover, a seamless sound-insulating cover can be provided that covers the outer surfaces of the upper tubular portion and the assembly portion.

"7" In the pipe fitting of this embodiment, a configuration can be adopted in which the collecting portion and the lower connecting portion are connected and an intermediate portion having the same inner diameter from one end to the other end is provided.

If an intermediate section with a larger internal volume is disposed below the collecting section, the wastewater that has passed through the collecting section can be introduced into the intermediate section with a larger internal volume and flow therein, thereby further improving the drainage performance.
If a large amount of wastewater flows into the collection section from the vertical drainage pipes on the upper floors or the horizontal pipes in total, the wastewater can be smoothly guided to the intermediate section and then to the vertical drainage pipes on the lower floors.

This type of fitting has an upper tubular portion with an inner diameter larger than the inner diameter of the vertical pipe extending from the upper floor, which means that the internal volume of the section where wastewater flows from the vertical pipe into the fitting is large, providing a fitting with excellent drainage capacity in the section from the vertical pipe to the fitting.

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. FIG. FIG. 2 is a cross-sectional view showing an example of a sound-insulating cover made of an inner layer material and an outer layer material that is applied to the joint. 10 is a cross-sectional view showing another example of a sound-insulating cover made of an inner layer material, an intermediate layer material, and an outer layer material that can be applied to the joint. FIG. FIG. 10 is a perspective view showing a second example of a swivel member applied to the lower part of the joint. FIG. 10 is a perspective view showing a third example of a swivel member applied to the lower part of the joint. FIG. 4 is a cross-sectional view showing a joint according to a second embodiment of the present invention. FIG. 10 is a cross-sectional view showing another example of a swivel member applied to the upper part of the joint. FIG. 10 is a cross-sectional view showing a joint according to a third embodiment of the present invention. FIG. 10 is a cross-sectional view showing a joint according to a fourth embodiment of the present invention. FIG. 10 is a cross-sectional view showing another example of a swivel member applied to the upper part of the joint. FIG. 10 is a cross-sectional view showing a joint according to a fifth embodiment of the present invention. FIG. 10 is a cross-sectional view showing a joint according to a sixth embodiment of the present invention. FIG. 10 is a cross-sectional view showing a joint according to a seventh embodiment of the present invention. FIG. 13 is a cross-sectional view showing a joint according to an eighth embodiment of the present invention. FIG. 13 is a cross-sectional view showing a joint according to a ninth embodiment of the present invention. FIG. 19 is a cross-sectional view showing a joint according to a tenth embodiment of the present invention. FIG. 19 is a cross-sectional view showing a joint according to an eleventh embodiment of the present invention. FIG. 22 is a cross-sectional view showing a joint according to a twelfth embodiment of the present invention.

A fitting according to a first embodiment of the present invention will be described below with reference to Figures 1 to 5. The fitting 1 according to this embodiment is a drainage pipe fitting that is applied to drainage equipment 2 in apartment buildings such as condominiums, office buildings, and the like.
As shown in Figure 1, the drainage system 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 installed 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 of the lower floor into the upper receiving port of the joint of the lower floor, inserting the lower end of the joint 1 of the upper floor into the upper spigot of the drainage vertical pipe 5 to connect them, and connecting the lower end of the drainage vertical pipe 5 extending to the upper floor to the upper spigot of the joint 1.

The joint 1 includes a tubular vertical pipe connection portion 10 connected to the vertical drainage pipe 5 extending to the upper floor, and a collecting portion 12 having a tubular horizontal pipe connection portion 11 connected to the horizontal pipe 6. The joint 1 also includes an upper tubular portion 13 that connects the vertical pipe connection portion 10 and the collecting portion 12 and has an inner diameter larger than the inner diameter of the vertical drainage pipe 5, and a lower connecting portion 15 that is connected to the vertical drainage pipe 5 extending to the lower floor.
In the joint 1, at least one of the upper tubular portion 13, the collecting portion 12, and the lower connecting portion 15 is made of a molded resin body. A first swirl vane (first swirl member) 16 is provided inside the upper tubular portion 13, and a second swirl vane (second swirl member) 17 and a third swirl vane (third swirl member) 18 are provided inside the lower connecting portion 15.

The joint 1 of this embodiment is installed, for example, at a portion where a through hole 19 that passes through the floor slab S in the vertical direction is formed, as shown in FIG.
The upper tubular portion 13 is the portion to which the lower end spigot of the vertical drainage pipe 5 extending from the upper floor is connected via an upper receiving member 20. The upper receiving member 20 has a cylindrical peripheral wall portion 21, with an outer flange portion 22 formed on the outer periphery of this peripheral wall portion 21 and an inner flange portion 23 formed on the inner periphery of the lower end of the peripheral wall portion 21. The upper receiving member 20 is fitted to the upper tubular portion 13 by inserting the lower side of the peripheral wall portion 21 into the receiving port 13A at the upper end of the upper tubular portion 13. A sealing member 25 made of an elastic material such as rubber is housed inside the upper receiving member 20.

The seal member 25 has a cylindrical wall portion 26, an inner flange-type vertical pipe receiving portion 27 formed on the inner periphery of the bottom of the cylindrical wall portion 26, and a seal body portion 28 formed on the inner periphery of the upper part of the cylindrical wall portion 26. The seal member 25 is housed inside the upper receiving member 20 with the vertical pipe receiving portion 27 in contact with the inner flange portion 23 of the upper receiving member 20.
The lower end of the vertical drainage pipe 5 on the upper floor side is inserted into the part where the seal member 25 is provided inside the upper receiving member 20, and the vertical drainage pipe 5 is supported by the vertical pipe receiving part 27. In addition, a ring-cap type cover member 29 is provided on the cylindrical wall part 26, and the upper surface side of the seal main body part 28 through which the vertical drainage pipe 5 is inserted is covered with the cover member 29.

The upper cylindrical portion 13 has a spigot 13B formed at its lower end with a reduced diameter, and this spigot 13B is inserted into the socket 12A at the upper end of the collecting portion 12 and fitted to the top of the collecting portion 12.
As shown in Figure 1, one or more horizontal pipe connection sections 11 are formed on the side of the collecting section 12, into which horizontal pipes 6 are inserted and connected. Each horizontal pipe connection section 11 has a cylindrical section 11a and an inner flange section 11b formed on the base end side of the cylindrical section 11a. The horizontal pipe 6 is inserted into the horizontal pipe connection section 11 via a cylindrical horizontal pipe joint member (bush) 11A, and a ring-shaped plate-shaped cover member 11D is attached to the section where the horizontal pipe 6 passes through the horizontal pipe joint member 11A. The horizontal pipe 6 inserted into the horizontal pipe connection section 11 is fixed to the horizontal pipe connection section 11 by a fixing means such as adhesive. In the installed state shown in Figure 1, the horizontal pipe connection section 11 is located directly above the floor slab S.

A vertical rib 12b is formed on the inner periphery of the collecting section 12 at a position adjacent to the portion 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.
The collecting portion 12 is cylindrical and has the same inner diameter from its top end to its bottom end. A spigot 12B at the bottom end of the collecting portion 12 is fitted into the top end of the lower connecting portion 15.

The lower connecting portion 15 is a member that constitutes the lower portion of the joint 1, and is formed with a large diameter cylindrical portion 15a, a tapered portion 15b, and a small diameter cylindrical portion 15c that are coaxially formed from top to bottom.
The inner diameter of the large-diameter cylindrical portion 15a is set to be approximately equal to the outer diameter of the spigot 12B of the collecting portion 12. The axial length of the large-diameter cylindrical portion 15a is set to be slightly smaller than the axial length of the collecting portion 12. In Figure 1, the axial length of the large-diameter cylindrical portion 15a is formed to be approximately half the thickness of the floor slab S.

The tapered section 15b 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 15a, and it is positioned so as to protrude a predetermined length below the floor slab S.
As shown in Figure 1, the small-diameter cylindrical portion 15c is the portion into which the upper end of the vertical drainage pipe 5 of the lower floor is inserted and connected, and is configured to protrude downward by a certain distance from the ceiling surface of the floor slab S. A stopper portion 15d, which abuts against the upper end surface of the upper end insertion port of the vertical drainage pipe 5 of the lower floor, is formed inside the small-diameter cylindrical portion 15c on an extension line of the tapered portion 15b. As shown in Figure 1, a recessed portion 15f is formed around the stopper portion 15d to prevent an increase in the wall thickness of the stopper portion 15d and the vicinity thereof.

The first swirl vane 16 is supported by a support piece 16a extending downward from the lower end of the peripheral wall portion 21 of the upper receiving member 20, and is formed so as to be located inside the center of the upper tubular portion 13 in the height direction. The first swirl vane 16 has a curved plate 16b with a tapered tip, and the curved plate 16b is positioned with its concave portion facing upward and facing below the vertical drainage pipe 5. This first swirl vane 16 is configured to receive a portion of the wastewater flowing down from the vertical drainage pipe 5 and swirl it along the curved plate 16b, generating a swirling flow.

The second swirl vane 17 consists of an arc-shaped blade plate 17a formed to extend diagonally up and down inside the lower connecting portion 15. The third swirl vane 18, like the first swirl vane 16, has a curved plate 18b with a tapered tip, and is positioned with its concave portion facing upward and facing below the large-diameter cylindrical portion 15a. Each of these swirl vanes generates a swirling flow in part of the wastewater, streamlining the wastewater and contributing to improved drainage performance.

In the joint 1, a first sound-insulating cover 30 is provided to cover the outer periphery of the upper tubular portion 13 and the outer periphery of the peripheral wall portion 21 above it, and a second sound-insulating cover 31 is provided to cover the outer periphery of the lower part of the upper tubular portion 13 and the outer periphery of the assembly portion 12. In the configuration shown in FIG. 1 , the lower end of the first sound-insulating cover 30 is arranged as an overlapping portion 30a to cover the upper end of the second sound-insulating cover 31, and a waterproof tape 33 is wrapped around the overlapping portion 30a covering the upper end of the second sound-insulating cover 31 to cover this overlapping portion. The second sound-insulating cover 31 is arranged to cover the outer periphery of the cylindrical portion 11a of the horizontal pipe connection portion 11 where the cylindrical portion 11a is provided. The second sound-insulating cover 31 is formed up to a position covering the upper end of the lower connection portion 15.
The upper end of the first sound-insulating cover 30 is formed up to the upper end of the tubular wall portion 26 of the upper receiving member 20 or the peripheral portion of the cover member 29, and the upper end of the first sound-insulating cover 30 is protected by a waterproof tape 34 wrapped around it.

As an example, the first sound-insulating cover 30 and the second sound-insulating cover 31 have a two-layer structure consisting of an inner layer a made of an inner layer material such as soft urethane foam and an outer layer b made of an exterior material such as a butyl-based rubber sheet with a synthetic resin-based adhesive, as shown in Fig. 2. The inner layer a may also 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 waterproof tape 33 is made of a butyl rubber sheet with a polyolefin film or the like, and can be attached to the area where it is used, thereby waterproofing the area where it is attached.

A thermal expansion material 35 made of a graphite-based thermal expansion material or the like is attached to the outer periphery of the large-diameter cylindrical portion 15a of the lower connection portion 15. For example, the thermal expansion material 35 is made of thermally expandable graphite with a thermal expansion start temperature set to 240°C or higher, and expands in the event of a fire to block the through-hole 19 in the floor slab S.

A third sound-insulating cover 36 is provided on the lower connection portion 15, covering the area from the thermal expansion material-attached portion at its upper end to the small-diameter cylindrical portion 15c. The third sound-insulating cover 36 can, for example, be configured with an inner layer a such as a fiber-mixed mortar layer and an outer layer b such as a sound-insulating sheet; however, the outer layer b made of a sound-insulating sheet need not be provided, and the cover can have a structure similar to that of the first sound-insulating cover 30 and the second sound-insulating cover 31 described above. As an example, a two-layer structure can be used, consisting of an inner layer a made of an inner layer material such as soft urethane foam, as shown in Figure 2, and an outer layer b made of an exterior material such as a butyl-based rubber sheet with a synthetic resin adhesive.

The joint 1, covered with the first to third sound-insulating covers 30, 31, and 36, passes through the through-hole 19 in the floor slab S and is attached to the floor slab S so that the thermal expansion material 35 is disposed within the through-hole 19. More specifically, the joint 1 is fixed to the floor slab S with a filler 37, such as mortar, filled into the through-hole 19 so as to fill the through-hole 19 around the joint 1, with the large-diameter cylindrical portion 15a positioned at the upper inner side of the through-hole 19.

As shown in Figure 1, the joint 1 attached to the floor slab S connects the upper floor vertical drain pipe 5 with the lower floor vertical drain pipe 5, and wastewater from each floor flows into the collection section 12 via the horizontal pipe 6. The upper floor wastewater flows from the upper floor vertical drain pipe 5 into the collection section 12 via the upper tubular section 13 of the joint 1. However, because a first swirl vane 16 is installed inside the upper tubular section 13, a portion of the wastewater is converted into a swirling flow, straightened, and directed downward. For example, if the first swirl vane 16 guides the wastewater downward while swirling, the reflected flow of the wastewater can be prevented from flowing back toward the horizontal pipe. Therefore, the joint 1 has excellent drainage performance.

The upper tubular portion 13 of the fitting 1 is cylindrical and has the same inner diameter as the collection portion 12. Wastewater flowing in from the vertical drain pipe 5 on the upper floor side reaches the internal space of the upper tubular portion 13, which has a larger inner diameter than the vertical drain pipe 5. The upper tubular portion 13 has a larger diameter than the vertical drain pipe 5 and a sufficiently large internal space volume. Therefore, the provision of the upper tubular portion 13 ensures sufficient volume for the wastewater inlet of the fitting 1, resulting in high drainage performance for the fitting 1. For example, even if a large amount of wastewater flows into the upper tubular portion 13 from the vertical drain pipe 5, the interior of the upper tubular portion 13 is unlikely to become negative pressure, preventing drainage problems and resulting in excellent drainage performance.

Furthermore, no reduced diameter section is formed below the collection section 12, allowing wastewater to flow to the lower connection section 15 while maintaining the same inner diameter. If a reduced diameter section were formed below the collection section 12, the collection section 12 would be prone to becoming a region where wastewater from the horizontal pipes 6 and the wastewater from the vertical drainage pipes 5 would mix, increasing the amount of wastewater and causing the collection section 12 to become full. For this reason, depending on the full-water state, an abnormal negative pressure region or positive pressure region may be generated below the collection section 12, which could cause problems with drainage. Therefore, by making the lower part of the collection 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 upper side of the joint 1 has a divided structure consisting of two parts, the collection part 12 and the upper tubular part 13, and is therefore made from a molded resin body. There are few shape restrictions when molding each part, making it easy to manufacture.
For example, if the collecting portion 12 and the upper tubular portion 13 of the fitting 1 are integrally molded, there is a risk that it will be impossible to mold the collecting portion 12 and the upper tubular portion 13 in a complex shape due to issues such as limitations on the molding process. This would impose limitations on the shapes of the collecting portion 12 and the upper tubular portion 13 obtained as molded products, which could cause problems when molding a shape that can pass a large amount of wastewater, such as 7 L/s or more. In this regard, if the collecting portion 12 and the upper tubular portion 13 are molded separately, the degree of freedom in molding them individually increases, making it possible to manufacture molded products that can pass a large amount of wastewater, such as 7 L/s or more.

The joint 1 shown in Figure 1 has an upper receiving member 20 on top of the upper tubular portion 13, and the portion that receives the vertical drainage pipe 5 on the upper floor is covered with the seal body 28, resulting in a structure that is less likely to cause water leakage in the portion that receives the vertical drainage pipe 5 on the upper floor.

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.
In this case, the thermal expansion material 35 is provided between the second swirl vane 17, the third swirl vane 18 and the vertical rib 12b, so that when the thermal expansion material 35 thermally expands, these swirl vanes 17, 18 and the vertical rib 12b do not hinder the thermal expansion.

In a building, wastewater collected in a horizontal pipe 6 flows into a joint 1. When the flow rate is high, the wastewater occupies most of the inside of the horizontal pipe 6, but when the flow rate is low, the wastewater flows along the lower end of the 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, thereby preventing the wastewater from flowing back into other horizontal pipes. For example, wastewater that flows downward through the vertical drainage pipe 5 is appropriately treated by wastewater treatment equipment (not shown).

The joint 1 shown in Fig. 1 has excellent sound insulation properties because it is covered with a first sound-insulating cover 30, a second sound-insulating cover 31, and a third sound-insulating cover 36. For example, even if drainage water passes through the inside, the structure makes it difficult for the drainage noise to leak to the outside.
Furthermore, the first sound-insulating cover 30 is attached to the outer surface of the upper tubular portion 13, and the second sound-insulating cover 31 is attached to the outer surfaces of the upper tubular portion 13 and the collecting portion 12. Therefore, the first sound-insulating cover 30 can be fastened to the outer surface of the upper tubular portion 13, and the second sound-insulating cover 31 can be fastened to the outer surfaces of the upper tubular portion 13 and the collecting portion 12. Because the first sound-insulating cover 30 and the second sound-insulating cover 31 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.

In the joint 1 of the first embodiment shown in Figure 1, the first swirl vane 16 is provided inside the upper tubular portion 13. However, in addition to the first swirl vane 16, a deflector vane may be provided so as to protrude diagonally upward and downward from the inner surface of the peripheral wall of the upper tubular portion 13. Apart from the first swirl vane 16, a deflector vane may be used to generate a swirling flow or a deflected flow in the wastewater flow, thereby rectifying the wastewater and smoothing its flow. Furthermore, if a deflector vane is provided, the first swirl vane 16 may be omitted.
Furthermore, in the fitting 1 of the first embodiment, the vertical pipe connection portion 10 and the upper tubular portion 13 are separate components that are integrated by fitting together, but the vertical pipe connection portion 10 and the upper tubular portion 13 may also be formed from a single molded resin component.

FIG. 3 is a cross-sectional view showing an example of the joint 1 shown in FIG. 1 in which the third sound-insulating cover 36 has a three-layer structure.
The third sound-insulating cover 40 shown in Fig. 3 has a three-layer structure consisting of an inner layer 41 made of soft urethane foam, a middle layer 42 made of glass wool heat-insulating material, and an outer layer 43 made of aluminum foil with a synthetic resin adhesive or glass cloth, etc. The structure is the same as that shown in Fig. 1 in that a thermal expansion material 35 is wound around the portion corresponding to the outside of the large-diameter cylindrical portion 15a.
The third sound insulating cover 40 having a three-layer structure shown in FIG. 3 can also provide the same sound insulating effect as the third sound insulating cover 36 shown in FIG.

FIG. 4 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 4 shows an example in which a recess 44 recessed inward is formed in a part of the wall portion constituting the tapered portion 15b of the lower connection portion 15, thereby forming a second swirl vane 17 inside the tapered portion 15b.
The second swirl vane 17 may be integral with the lower connection portion 15 or may be separate from the lower connection portion 15 .

FIG. 5 shows an interior member 45 as a swiveling member that is desirable when placed inside the lower connection portion 15. This interior member 45 has a structure that can decelerate 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 swivel guide 48 .
5, the cylindrical portion 46 of the interior member 45 is composed of a cylindrical main body 46a that is fitted into the large-diameter cylindrical portion 15a, 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.

FIG. 6 shows a second embodiment of a joint according to the present invention. A joint 50 of this second embodiment differs from the structure of the first embodiment in the position where the first swirl vane 16 is provided.
In the first embodiment, the first swirl blade 16 is supported by the support piece 16 a that extends downward from the lower end of the peripheral wall portion 21 of the upper receiving member 20 .
In the second embodiment, the first swirl vane 16 is supported by a support piece 16 a extending downward from the lower end of the peripheral wall of the upper cylindrical portion 13 .

In the second embodiment, the first swirl vane 16 is formed so as to be located inside the center in the height direction of the collecting section 12. The shape of the first swirl vane 16 is the same as the configuration in the first embodiment, and it is arranged so that the concave portion of the curved plate 16b faces upward and faces below the upper tubular section 13. The first swirl vane 16 in the second embodiment receives a portion of the wastewater flowing down from the vertical drainage pipe 5 and swirls it along the curved plate 16b, thereby generating a swirling flow.
The joint 50 of the second embodiment has other configurations that are 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.

FIG. 7 shows another example of the structure of the first swirl vane 16 provided in the collection portion 12 in the joint 50 shown in FIG.
In the structure shown in FIG. 7, a recess 12 d is formed inward in a part of the peripheral wall of the collecting portion 12 , thereby forming a first swirl vane 52 on the inner side of the collecting portion 12 .
The first swirl vane 52 may be configured integrally with the collecting portion 12 or may be configured separately from the collecting portion 12 .

FIG. 8 shows a third embodiment of a joint according to the present invention. A joint 60 of this third embodiment differs from the first embodiment in the configuration of the upper tubular portion 13.
In the configuration of the first embodiment, a spigot 13B having a smaller diameter than the peripheral wall of the upper tubular portion 13 is formed at the lower end of the upper tubular portion 13, but in the joint 60 of the third embodiment, a socket 13d having a larger diameter than the peripheral wall is formed at the lower end of the upper tubular portion 13. The upper end of the assembly portion 12 is fitted into this socket 13d.

In the fitting structure between the lower end of the upper tubular portion 13 and the upper end of the assembly portion 12, either one may have a spigot formed thereon, or either one may have a socket formed thereon.
In any case, the fitting structure of the spigot and socket makes it possible to realize a structure in which the upper tubular portion 13 and the assembly portion 12 can be separated and yet can be reliably joined.
The joint 60 of the third embodiment has other configurations that are 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 60 of the third embodiment can obtain operational effects equivalent to those of the joint 1 of the first embodiment.

9 shows a fourth embodiment of a joint according to the present invention, and in this fourth embodiment, the configuration of the first swirl vane 16 of the joint 65 is different from that of the third embodiment. The other configurations are the same as those of the third embodiment.
In the fourth embodiment, a ring member 66, the overall configuration of which is shown in Figure 10, is fitted between the upper tubular portion 13 and the collecting portion 12, and the first swirl vane 16 is supported by a support piece 16a extending downward from the lower end of the peripheral wall of this ring member 66.

The ring member 66 has a peripheral wall 66a with a constant thickness, and a peripheral protrusion 66b is formed in the center of the outer surface of the peripheral wall 66a in the height direction. A spigot 66A is formed on the upper side of the peripheral protrusion 66b of the ring member 66, which can be inserted into the socket 13d of the upper tubular portion 13 shown in Figure 8. A spigot 66B is formed on the lower side of the peripheral protrusion 66b of the ring member 66, which can fit into the upper end of the assembly portion 12 shown in Figure 8.

The ring member 66 has its spigot portion 66A fitted into the socket 13d of the upper tubular portion 13 and its spigot portion 66B fitted into the socket 12A of the collecting portion 12, joining the upper tubular portion 13 and the collecting portion 12. In this state, the ring member 66 supports the first swirl vane 16 so that it is positioned inside the collecting portion 12.
In the fourth embodiment, the first swirl vane 16 is formed so as to be located inside the center in the height direction of the collecting section 12. The shape of the first swirl vane 16 is the same as the configurations of the first and third embodiments, and is arranged so as to face below the upper tubular section 13 with the concave surface of the curved plate 16b facing upward.

The first swirl vane 16 of the fourth embodiment receives a portion of the wastewater flowing down from the vertical drain pipe 5 and swirls the portion along the curved plate 16b to generate a swirling flow.
The joint 65 of the fourth embodiment has other configurations similar to those of the joint 1 of the third embodiment, so the same components are given the same reference numerals and their description will be omitted.
Regarding other operational effects, the joint 65 of the fourth embodiment can obtain operational effects equivalent to those of the joint 60 of the third embodiment.

11 shows a fifth embodiment of a fitting according to the present invention. A fitting 70 of this fifth embodiment has a configuration substantially equivalent to that of the fitting 1 of the first embodiment, except that the horizontal pipe 6 is connected to the cylindrical portion 11a of the horizontal pipe connection portion 11 via a pipe fitting portion 72 having an inclined portion 72b inclined obliquely upward. The remaining configuration is equivalent to that of the first embodiment.
The pipe joint 72 has a first cylindrical portion 72 a, an inclined portion 72 b, and a second cylindrical portion 72 c. Because of the inclined portion 72 b, the second cylindrical portion 72 c is installed at a slightly higher position than the first cylindrical portion 72 a, and a horizontal pipe (not shown) connected to the pipe joint 72 is connected to the collecting portion 12 at a position slightly higher than the cylindrical portion 11 a.

By providing a pipe joint 72 with an inclined section 72b, it is possible to create a downward diagonal flow of wastewater when it flows from the horizontal pipe 6 into the collection section 12, allowing the wastewater from the horizontal pipe 6 to be smoothly introduced into the lower connection section 15. This reduces the risk of wastewater from the horizontal pipe 6 blocking the bottom side of the collection section 12 and blocking the flow of wastewater from the vertical drain pipe 5.

11, it is not necessary to orthogonally orthogonalize the horizontal pipe to the axis of the cylindrical portion 11a, and the connecting portion of the horizontal pipe may be connected to the cylindrical portion 11a so as to have a bent axis. Since the other configuration of the joint 70 of the fourth embodiment is the same as that of the joint 1 of the first embodiment, the same components are designated by 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.

12 shows a sixth embodiment of a joint according to the present invention, and a joint 75 of this sixth embodiment has a configuration substantially equivalent to that of the joint 1 of the first embodiment, but differs in the installation state of the first sound-insulating cover 30 and the second sound-insulating cover 31. In the sixth embodiment, the end face of the lower end 30b of the first sound-insulating cover 30 and the end face of the upper end 31b of the second sound-insulating cover 31 are butted together so as not to overlap, and a waterproof tape 76 is wrapped around the butted and opposed portion. The other configuration is equivalent to that of the first embodiment.
The first sound insulating cover 30 and the second sound insulating cover 31 may be installed with their ends overlapping as in the first embodiment, or may be installed with their ends butted together so as not to overlap as in the sixth embodiment.

13 shows a seventh embodiment of a joint according to the present invention. A joint 80 of this seventh embodiment has a configuration substantially equivalent to that of the joint 1 of the first embodiment, but differs in the state of the first sound-insulating cover 30 and the second sound-insulating cover 31. In the seventh embodiment, the first sound-insulating cover 30 and the second sound-insulating cover 31 are configured as a single common sound-insulating cover 81. The configuration of the sound-insulating cover 81 is equivalent to that of the first sound-insulating cover 30 and the second sound-insulating cover 31. As an example, the two-layer structure of the inner layer a and outer layer b described above can be employed.
The first sound insulating cover 30 and the second sound insulating cover 31 may be separate bodies as in the first embodiment, or may be a common body as in the seventh embodiment. When a common sound insulating cover 81 is used, the waterproof tape 33 can be omitted.

Figure 14 shows an eighth embodiment of a fitting according to the present invention. The fitting 85 of this eighth embodiment has a configuration substantially identical to the fitting 1 of the first embodiment, but differs in the structure of the first sound-insulating cover 30 and the second sound-insulating cover 31. In the eighth embodiment, the first sound-insulating cover 30 and the second sound-insulating cover 31 are formed by a single common sound-insulating cover 86. As an example, the sound-insulating cover 86 can be formed as a two-layer structure consisting of an inner layer a made of a fire-resistant material such as fiber-mixed mortar and an outer layer b made of a sound-insulating sheet. Note that the outer layer b made of a sound-insulating sheet need not be provided.

The first sound-insulating cover 30 and the second sound-insulating cover 31 may be separate bodies as in the first embodiment, or they may be a common body made of fiber-mixed mortar as in the eighth embodiment. If a common sound-insulating cover 86 is used, the waterproof tapes 33 and 34 can be omitted.

FIG. 15 shows a ninth embodiment of a joint according to the present invention.
The joint 90 of this ninth embodiment has a similar configuration to the joint 1 of the first embodiment, but differs in that a cylindrical intermediate portion 91 of the same inner diameter is connected below the collecting portion 12, and a lower connecting portion 15 is connected below the intermediate portion 91.
The intermediate portion 91 is provided to pass through the through hole 19 of the floor slab S, and the lower connection portion 15 is connected to the lower end of the intermediate portion 91 which is provided to protrude slightly below the floor slab S.
In the lower connecting portion 15 of the ninth embodiment, a socket 15g is formed in the upper part of the large diameter cylindrical portion 15a, and the lower end of the intermediate portion 91 is fitted into this socket 15g.
A socket 91A with a slightly larger diameter is formed at the upper end of the intermediate portion 91, and a spigot 12B at the lower end of the assembly portion 12 is fitted into this socket 91A.
The inner diameter of the intermediate portion 91 is approximately the same as the inner diameter of the collecting portion 12 and the upper cylindrical portion 13. The outer diameter of the intermediate portion 91 is, for example, 175 to 190 mm, and in the configuration of Figure 15, for example, the inner diameter is the same from the upper end to the lower end.

Since the middle portion 91 is configured to be housed in the through-hole 19 of the floor slab S, the thermal expansion material 35 is wrapped around the outer periphery of the middle portion 91. Also wrapped around the outer periphery of the middle portion 91 is a fourth sound-insulating cover 92 with a configuration similar to that of the third sound-insulating cover 36, which has a two-layer structure combining an inner layer a made of a fire-resistant material such as fiber-mixed mortar and an outer layer b made of a sound-insulating sheet. The outer layer b made of a sound-insulating sheet does not necessarily have to be provided.

15, the upper part of the fourth sound-insulating cover 92 is below the second sound-insulating cover 31 and covers the periphery of the spigot 12B at the lower end of the assembly part 12, and the lower part of the fourth sound-insulating cover 92 covers up to a part slightly above the socket 15g. The lower end of the second sound-insulating cover 31 and the upper end part of the fourth sound-insulating cover 92 are butted together, and the part of the outer layer b that covers the upper end of the inner layer a of the fourth sound-insulating cover 92 butts against the lower end of the second sound-insulating cover 31.
Additionally, the lower end of the fourth sound-insulating cover 92 and the upper end of the second sound-insulating cover 31 are butted together. The outer layer b is formed so as to cover the end of the inner layer a at the lower end of the fourth sound-insulating cover 92, and the outer layer b is formed so as to cover the end of the inner layer a at the upper end of the second sound-insulating cover 31, so that the lower end of the fourth sound-insulating cover 92 and the upper end of the second sound-insulating cover 31 are connected by butting their outer layers together.
The other configurations are the same as those of the first embodiment.

The joint 90 of the ninth 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.
The joint 90 has an upper tubular portion 13 and a collecting portion 12 with an inner diameter larger than that of the vertical drainage pipe 5 shown in Figure 1, and the internal volume of the upper tubular portion 13 and the collecting portion 12 into which the wastewater flows from the vertical drainage pipe 5 is increased, thereby improving drainage performance, which is the same as the configuration of the first embodiment.

In the configuration of the ninth embodiment, an intermediate section 91 with a large internal volume is further arranged below the collection section 12, so that the wastewater that has passed through the collection section 12 can be introduced into the intermediate section 91 with a large internal volume and flowed therethrough, thereby further improving drainage performance.
Therefore, even if a large amount of wastewater flows into the collection section 12 from the vertical drainage pipe 5 on the upper floor side or from the horizontal pipe, the wastewater can be smoothly guided to the intermediate section 91 and then to the vertical drainage pipe on the lower floor side.
Regarding other operational effects, the joint 90 of the ninth embodiment can obtain operational effects equivalent to those of the joint 1 of the first embodiment.

16 shows a tenth embodiment of the joint according to the present invention, and the joint 95 of this tenth embodiment differs from the configuration of the third embodiment in the fitting structure of the spigot and socket between the upper tubular portion 13 and the assembly portion 12. The other configurations are the same as those of the third embodiment.
In the fitting 60 of the third embodiment, a socket 13d having a larger diameter than the peripheral wall is formed at the lower end of the upper tubular portion 13. However, in the fitting 95 of this embodiment, the upper end of the collection portion 12 has an enlarged socket 12A. In this case, there is no need to narrow the diameter (inner diameter) of the spigot 13B at the lower end of the upper tubular portion 13. If the inner diameter of the spigot 13B is not narrowed, the internal step of the fitting 95 is eliminated, the internal volume of the fitting 95 is expanded, and drainage performance is improved.
The joint 95 of the tenth embodiment has other configurations similar to those of the joint 60 of the third embodiment, so the same components are given the same reference numerals and their description will be omitted.
As for other functions and effects, the joint 95 of the tenth embodiment can obtain the same functions and effects as the joint 60 of the third embodiment.

17 shows an eleventh embodiment of a joint according to the present invention, and the joint 100 of this eleventh embodiment differs from the tenth embodiment in that it is provided with the aforementioned deflector plate 101 instead of the first swirl vane 16. The other configurations are the same as those of the tenth embodiment.
In the eleventh embodiment, the deflector plate 101 is provided on a portion of the inner surface of the upper part of the upper tubular portion 13 that is located below the upper receiving member 20. The deflector plate 101 is provided on a portion of the inner surface of the upper part of the collecting portion 12 that is located below the upper tubular portion 13. The deflector plate 101 may be provided on only one of these two portions, or on both. It is preferable that the deflector plate 101 is molded integrally with either the upper tubular portion 13 or the collecting portion 12 (rather than being molded as a separate member and combined).
The joint 100 of the eleventh embodiment has other configurations similar to those of the joint 95 of the tenth embodiment, so the same components are given the same reference numerals and their description will be omitted.
Regarding other operational effects, the joint 100 of the eleventh embodiment can obtain operational effects equivalent to those of the joint 95 of the tenth embodiment.

18 shows a twelfth embodiment of a joint according to the present invention, and the joint 105 of this twelfth embodiment differs from the configuration of the eleventh embodiment in that the upper tubular portion 13 includes a plurality of upper and lower tubular bodies 106. The other configurations are the same as those of the eleventh embodiment.
In the twelfth embodiment, the upper tubular portion 13 includes two upper and lower tubular bodies 106. In other words, the upper tubular portion 13 is divided into two upper and lower tubular bodies 106. The vertically adjacent tubular bodies 106 are fixed by fitting together. In this embodiment, the upper end of the lower tubular body 106 has an expanded diameter to form a socket 106A. The lower end of the upper tubular body 106 does not reduce in diameter and forms a spigot 106B. In the illustrated example, the deflector plate 101 is provided on the uppermost tubular body 106 among the multiple tubular bodies 106, but it may also be provided on another tubular body 106.
The joint 105 of the twelfth embodiment has other configurations similar to those of the joint 100 of the eleventh embodiment, so the same components are given the same reference numerals and their description will be omitted.
Regarding other operational effects, the joint 105 of the twelfth embodiment can obtain operational effects equivalent to those of the joint 100 of the eleventh embodiment.

Each embodiment of the present invention has been described in detail above with reference to the drawings, but the specific configuration of the present invention is not limited to these embodiments, and the present invention also includes modifications, combinations, deletions, etc. of the configuration within the scope of the gist of the present invention.

S...floor slab, 1...joint, 2...drainage equipment, 5...vertical drainage pipe, 6...horizontal pipe (horizontal drainage branch pipe), 10...vertical pipe connection section, 11...horizontal pipe connection section, 12...collection section, 13...upper tubular section, 13A...receptacle, 13B...spigot, 15...lower connection section, 16...first swirl blade (first swirl member), 17...second swirl blade (second swirl member), 18...third swirl blade (third swirl member), 19...through hole, 20...upper receiving member, 30...first sound-insulating cover, 31...second sound-insulating cover, 36...third sound-insulating cover, 50, 60, 65, 70, 75, 80, 85, 90...joint, 81...sound-insulating cover.

Claims (8)

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;
an upper cylindrical portion that connects the vertical pipe connection portion and the collecting portion and has an inner diameter larger than an inner diameter of the vertical pipe;
a lower connection portion connected to a vertical pipe extending from the lower floor;
a first sound-insulating cover that covers an outer periphery of the upper tubular portion;
a second sound-insulating cover that covers an outer periphery of the collection portion;
a third sound-insulating cover that covers an outer periphery of the lower connection portion;
Equipped with
the upper tubular portion, the collecting portion, and the lower connecting portion are made of resin and are molded separately from each other;
a first rotating member is provided inside the upper cylindrical portion ;
a second pivot member is provided inside the lower connection portion ;
an upper end of the second sound-insulating cover is located above an upper end of the collection portion and covers an outer periphery of a lower portion of the upper tubular portion;
Fitting. a waterproof tape covering an overlapping portion between the first sound-insulating cover and the second sound-insulating cover;
The waterproof tape is located above the upper end of the assembly portion.
2. The joint of claim 1. a lower end of the second sound-insulating cover covering an outer periphery of an upper portion of the lower connection portion;
the third sound-insulating cover covers the outer periphery of the lower end of the second sound-insulating cover;
A joint according to claim 1 or 2. 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;
an upper cylindrical portion that connects the vertical pipe connection portion and the collecting portion and has an inner diameter larger than an inner diameter of the vertical pipe;
a lower connection portion connected to a vertical pipe extending from the lower floor;
a sound-insulating cover that covers the outer periphery of the upper tubular portion and the collection portion;
Another sound-insulating cover covering the outer periphery of the lower connection portion;
Equipped with
the upper tubular portion, the collecting portion, and the lower connecting portion are made of resin and are molded separately from each other;
a first rotating member is provided inside the upper cylindrical portion ;
a second pivot member is provided inside the lower connection portion ;
a lower end of the sound-insulating cover covering an outer periphery of an upper portion of the lower connection portion;
The other sound-insulating cover covers the outer periphery of the lower end of the sound-insulating cover.
Fitting. a lower portion of the upper cylindrical portion is a spigot that is inserted into an upper portion of the assembly portion;
The lower part of the assembly part is a spigot that is inserted into the upper part of the lower connection part.
A joint according to any one of claims 1 to 4. the vertical pipe connection portion has a seal member therein;
The vertical pipe connection portion and the upper cylindrical portion are integrally molded from resin.
A joint according to any one of claims 1 to 5. Vertical pipes installed on the upper and lower floors of the building,
A joint according to any one of claims 1 to 6 for connecting the vertical pipes together;
a horizontal pipe connected to the joint;
Drainage facilities. A building equipped with the drainage system according to claim 7.