JP6868149B2 - Drainage collective joint - Google Patents

Description

The present invention relates to a drainage collective joint.

A swivel blade for controlling the flow of drainage is inscribed in the collective joint that connects the drainage pipe on the upper floor of the building and the drainage pipe on the lower floor. By the action of the swirling blades, high drainage performance can be obtained by using drainage as a swirling flow.
This type of collective joint is provided so as to pass through a through hole provided in the floor slab up and down, and a vertical pipe or a horizontal branch pipe of each installed floor is connected. Since drainage flows into the collective joint from these drain pipes, the sound of drainage flowing down the collective joint may be transmitted through the floor slab and leak into the living space.

Patent Document 1 describes a first sound absorbing layer made of a sponge material, a second sound absorbing layer made of an aggregate of inorganic fibers, and a skin layer having both waterproof and sound insulating properties, as a sound insulating structure of a resin collective joint. A structure with and is disclosed.

In Patent Document 2, a portion other than the drainage guide portion is composed of a first hard vinyl chloride, and a drainage guide portion having a swirling blade is formed of a second hard vinyl chloride having a strength higher than that of the first hard vinyl chloride. The structure is disclosed. In this structure, the strength of the drainage receiving portion where the flowing drainage collides is improved, and the durability is improved.

JP-A-2017-014769 JP-A-2017-119960

In the above-mentioned drainage collective joint, if the swivel blade is provided inside, if an unexpected miscellaneous matter such as a towel is poured into the drainage pipe, there is a risk of causing a drainage failure due to the joint clogging.
Conventionally, when a problem such as a drainage failure occurs in a drainage pipe, it is necessary to use a special device such as an in-pipe camera to identify a clogged part.
However, in the structures described in Patent Document 1 and Patent Document 2, when an abnormality occurs in the pipe as in the case where the above-mentioned miscellaneous matter is poured into the drain pipe, the only countermeasure means is to insert an in-pipe camera and observe the inside. I couldn't easily check the inside of the pipe.

The present invention has been made in view of the above-mentioned circumstances, and provides a joint capable of easily checking the state inside a pipe without using a large-scale device or instrument when an abnormality occurs in the pipe. The purpose is.

In order to solve the above problems, the present invention proposes the following forms.
"1" The joint according to the present embodiment is an collective joint including an upper connecting pipe, an intermediate pipe connected to the upper connecting pipe, and a lower connecting pipe connected to the intermediate pipe, and is the upper connecting. Of the pipe and the lower connecting pipe, at least the upper connecting pipe is formed of a transparent material or a translucent material.

By forming at least the upper connecting pipe from the transparent material or the translucent material among the upper connecting pipe and the lower connecting pipe, at least the inner side of the upper connecting pipe can be visually recognized from the outer side. Therefore, even if miscellaneous items such as towels flow into the drainage collective joint and cause drainage clogging, the clogged portion can be confirmed from the outside, and countermeasures against the drainage clogging can be easily implemented. If the lower connecting pipe is also made of transparent or translucent material in addition to the upper connecting pipe, most of the drainage collective joint will be visible from the outside, causing clogging in any part of the drainage collective joint. However, the clogged part can be easily grasped.

"2" In the joint according to the present embodiment, it is preferable to attach a removable sound insulation cover to at least the outer periphery of the upper connecting pipe among the upper connecting pipe and the lower connecting pipe.

By attaching the sound insulation cover, it is possible to prevent the drainage sound flowing inside the drainage collective joint from leaking to the outside. For example, it is possible to prevent the drainage sound from leaking to the living room side along the floor slab. By making the sound insulation cover removable, the inside of the drainage collective joint can be visually recognized by removing the sound insulation cover when drainage clogging occurs, and it is easy to grasp where the clogging is occurring in the drainage collective joint. become able to.

"3" In the present embodiment, it is preferable that the intermediate tube contains a heat-expandable refractory material and the height of the intermediate tube is 150 mm or less.

If the height of the intermediate pipe is 150 mm or less, the floor slab thickness can be various in the range of 150 to 300 mm, and the intermediate pipe can be reliably arranged in the through hole of the floor slab even in different installation environments. It is possible to surely exhibit the effect of preventing the spread of fire. Therefore, the structure of this embodiment can be widely applied to any general slab-thick building, and is excellent in versatility.

If the floor slab and the area around the through hole are heated by flame or smoke during a fire, it is assumed that the lower connecting pipe buried in the through hole will melt down, and even if it melts down, the intermediate pipe will expand and the through hole will expand. Can be blocked. Therefore, the through hole H can be reliably closed in the event of a fire, and the effect of preventing the spread of fire is exhibited.

"4" In this embodiment, the upper connecting pipe or the lower connecting pipe may contain a flame retardant.

When the upper connecting pipe or the lower connecting pipe contains a flame retardant and is heated in the event of a fire or the like, the flame retardant has an endothermic effect and suppresses the temperature rise of the upper connecting pipe or the lower connecting pipe and their surroundings.

According to the present invention, it is possible to provide a joint that can be easily visually recognized from the outside even if clogging is caused by a foreign substance or the like.

It is sectional drawing which shows the collective joint which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the assembly joint. It is a developed view which shows the component structure of the collective joint shown in FIG. It is sectional drawing which shows the collective joint which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the collective joint which concerns on 3rd Embodiment of this invention.

Hereinafter, the collective joint according to the embodiment of the present invention will be described with reference to FIGS. 1 to 3.
The structure 1 of the drainage collective joint provided with the collective joint according to the present embodiment is used for building drainage and is applied to a portion of a through hole H formed in the floor slab S.
In the embodiment shown in FIG. 1, the first vertical pipe P1 on the upper floor is provided above the through hole H formed in the floor slab S, and the second vertical pipe on the lower floor is provided below. P2 is provided.
As shown in FIGS. 1 and 2, the structure 1 of the drainage collective joint according to the present embodiment includes the drainage collective joint 10.

The drainage collective joint 10 includes an upper connecting pipe 11 and a lower connecting pipe 12 connected to the upper connecting pipe 11 via an intermediate pipe 15. The upper connecting pipe 11 penetrates through the vertical pipe connecting portion 13 that can be connected to the first vertical pipe P1 and the horizontal pipe connecting portion 14 that is projected from the side surface of the vertical pipe connecting portion 13 and can connect the horizontal pipe P3. It has a lower end 9 inserted into the hole H.
The drainage collective joint 10 of the present embodiment is composed of an upper connecting pipe 11, a lower connecting pipe 12, and an intermediate pipe 15 which are resin joint constituent members.

In the following description, the upper connecting pipe 11 side of the vertical pipe connecting portion 13 along the central axis O of the vertical pipe connecting portion 13 will be referred to as an upper side, and the lower connecting pipe 12 side will be referred to as a lower side as appropriate.

The vertical pipe connecting portion 13 is provided with a weir plate 13a on the inner surface. The weir plate 13a has an installation angle of −30 ° to 20 ° from the vertical direction. If the installation angle is tilted more than 20 °, the swirling flow of the drainage swirled by the slant plate may not be sufficiently blocked, and a backflow to the lateral branch pipe may occur. Further, if the installation angle is tilted more than −30 °, the rebound of the received drainage becomes large, which may disturb the flow of drainage, and the pressure fluctuation in the pipe may become large.

The horizontal pipe connecting portion 14 extends in a tubular shape from the peripheral wall of the vertical pipe connecting portion 13 toward the outside in the radial direction orthogonal to the central axis O. In the present embodiment, three horizontal pipe connecting portions 14 are arranged in the circumferential direction of the vertical pipe connecting portion 13.
Two of the three horizontal pipe connecting portions 14 are individually arranged at positions sandwiching the central axis O in the radial direction. The remaining horizontal pipe connecting portion 14 extends in a radial direction orthogonal to the central axis O, in a direction in which each of the two horizontal pipe connecting portions 14 extends, and in a direction forming 90 ° in a plan view. There is.
The quantity and extending direction of the horizontal pipe connecting portion 14 are not limited to such an embodiment, and can be arbitrarily changed. As shown in FIG. 1, a horizontal pipe (horizontal branch pipe) P3 is connected to the tip end side of each horizontal pipe connecting portion 14.

The upper connecting pipe 11 is made of, for example, a polyvinyl chloride resin composition containing 0.1 to 1.0 parts by weight of non-expandable graphite with respect to 100 parts by weight of the polyvinyl chloride resin. The upper connecting pipe 11 is obtained, for example, by injecting and filling a cavity of a molding machine with a polyvinyl chloride-based resin composition.
The upper connecting pipe 11 needs to be made of a transparent or translucent polyvinyl chloride resin. Here, transparent or translucent means a state in which the inside of the upper connecting pipe 11 can be visually recognized from the outside of the upper connecting pipe 11.
In order to make the polyvinyl chloride resin transparent or translucent, a tin stabilizer or a Ca—Zn stabilizer is preferable as the stabilizer to be added to the polyvinyl chloride resin. As the tin-based stabilizer, sulfur-free agents such as malates and carboxylates are more preferable.
As the Ca-Zn-based stabilizer, stearate is more preferable from the viewpoint of the balance between slipperiness during molding and plate-out.
In addition, since transparency is required to enable visual inspection of the inside as a countermeasure against clogging of the upper connecting pipe 11, translucency means that the transmittance of visible light is 30% or more, or that the transmittance is 50% or more. Further, those having a transmittance of 70% or more can be used.

The intermediate pipe 15 is connected to the lower end 9 of the upper connecting pipe 11. The outer diameter of the intermediate pipe 15 is smaller than the outer diameter of the vertical pipe connecting portion 13 in the upper connecting pipe 11. The upper portion of the peripheral wall of the intermediate pipe 15 is fitted inside the lower end portion 9 of the vertical pipe connecting portion 13.

The intermediate tube 15 is made of, for example, a resin composition containing a polyvinyl chloride-based resin and heat-expandable graphite which is a heat-expandable refractory material. That is, the intermediate tube 15 is manufactured by molding a resin composition containing a heat-expandable refractory material. The intermediate tube 15 is produced, for example, by extrusion molding a resin composition.

Further, the intermediate tube 15 may have a single-layer structure in which the entire intermediate tube 15 is made of a resin composition containing a heat-expandable refractory material, or may be a multi-layer structure composed of a plurality of layers. In the case of a multi-layer structure, any layer may be formed from a resin composition containing a heat-expandable refractory material. For example, when the intermediate tube 15 has a three-layer structure including a surface layer, an intermediate layer, and an inner layer, an intermediate layer formed from a resin composition containing a heat-expandable refractory material can be exemplified. The inner layer may contain a heat absorbing agent in the resin composition.

As an example, a single-layer structure composed of a resin composition containing 1 to 20 parts by weight of heat-expandable graphite with respect to 100 parts by weight of a polyvinyl chloride resin can be adopted. Alternatively, the heat-expandable fire-resistant layer made of a resin composition containing 1 to 20 parts by weight of heat-expandable graphite with respect to 100 parts by weight of the polyvinyl chloride resin and the inner and outer surfaces of the heat-expandable fire-resistant layer are covered. A three-layer structure composed of a coating layer of a polyvinyl chloride-based resin composition containing no heat-expandable graphite can be adopted.

When the intermediate cylinder 15 has a single-layer structure, if the amount of thermally expandable graphite is less than 1 part by weight, sufficient thermal expansion may not be obtained at the time of combustion, and the desired fire resistance may not be obtained. If it exceeds the portion, the thermal expansion may be excessive due to heating, the shape may not be maintained, and the residue may fall out from the through hole H, resulting in a decrease in fire resistance.

When the intermediate cylinder 15 has a multi-layer structure, the resin composition containing the heat-expandable refractory material is not particularly limited, but 1 to 20 parts by weight of the heat-expandable graphite is added to 100 parts by weight of the polyvinyl chloride-based resin. It is preferable that the mixture is contained in the ratio of. The content of the heat-expandable graphite is more preferably 4 to 18 parts by weight, further preferably 6 to 16 parts by weight.
That is, if the amount of the heat-expandable graphite is less than 1 part by weight, sufficient heat-expandability may not be obtained at the time of combustion, and the desired fire resistance may not be obtained. If the amount of thermally expandable graphite exceeds 20 parts by weight, the graphite may expand excessively by heating, and the shape may not be maintained, and the residue may fall out from the through hole H, resulting in a decrease in fire resistance.
As will be described later, when the height of the intermediate tube 15 is smaller than the general slab thickness, the content of the heat-expandable graphite is relatively large, for example, when it is contained in an amount of 15 parts by weight or more and the residue is brittle. Even if there is, it is possible to retain the residue after thermal expansion in the slab and prevent it from falling off.

Examples of the polyvinyl chloride-based resin include polyvinyl chloride alone; a copolymer of a vinyl chloride monomer and a monomer having an unsaturated bond copolymerizable with the vinyl chloride monomer; (co) other than vinyl chloride. Examples thereof include a graft copolymer obtained by graft-copolymerizing vinyl chloride as a polymer, and these may be used alone or in combination of two or more.
Further, the polyvinyl chloride resin may be chlorinated if necessary.

The intermediate layer containing the heat-expandable graphite exhibits a black color. Therefore, it is preferable that the surface layer and the inner layer contain a colorant other than black so as to be distinguishable from the intermediate layer.
The thickness of the surface layer and the inner layer is preferably 0.3 mm or more and 3.0 mm or less, and preferably 0.6 mm or more and 1.5 mm or less, respectively. When the thickness of the coating layer is 0.3 mm or more, sufficient mechanical strength as a pipe can be secured, and when it is 3.0 mm or less, deterioration of fire resistance can be suppressed.
Further, the intermediate pipe 15 preferably satisfies the performance described in JIS K6741.
When the intermediate pipe 15 does not contain the heat-expandable graphite, a sheet-shaped refractory material containing the heat-expandable graphite is wound around the outer surface of the intermediate pipe 15 or the outer surface of the sound insulating material covering the intermediate pipe 15 to prevent fire. The material may be embedded in the slab penetration.

The heat-expandable graphite used in the present embodiment is, for example, after an acid treatment of powders such as natural scaly graphite, pyrolytic graphite, and kiss graphite with an inorganic acid and a strong oxidizing agent to insert the inorganic acid between the graphite layers. , A crystalline compound obtained by adjusting the pH can be used.
As the inorganic acid, concentrated sulfuric acid, nitric acid, selenic acid and the like can be used. As the strong oxidizing agent, concentrated nitric acid, perchloric acid, perchlorate, permanganate, dichromate, hydrogen peroxide and the like can be used.

A crystalline compound in which the layered structure of carbon is maintained by the pH adjustment, the heat-expandable graphite adjusted to pH 1.5 to 4.0, and the 1.3-fold expansion temperature of 180 ° C. to 280 ° C. The heat-expandable graphite of the above can be used.

If the pH of the heat-expandable graphite is less than 1.5, the acidity is too strong and easily causes corrosion of the molding apparatus, and if the pH exceeds 7.0, the carbonization promoting effect of the polyvinyl chloride resin is weakened. , Sufficient fire resistance may not be obtained.
The particle size of the heat-expandable graphite is not particularly limited, but for example, those in the range of 100 to 400 μm, preferably 120 to 350 μm can be used.

The resin composition constituting the intermediate tube 15 contains a stabilizer, an inorganic filler, a flame retardant, a lubricant, a processing aid, an impact modifier, and heat resistance improvement, if necessary, as long as the object of the present embodiment is not impaired. Additives such as agents, antioxidants, light stabilizers, UV absorbers, pigments, plasticizers, thermoplastic elastomers and the like may be added.

The height of the intermediate tube 15 is preferably 30 mm or more and 150 mm or less, more preferably 30 mm or more and 100 mm or less, and most preferably 30 mm or more and 80 mm or less. When the height of the intermediate pipe 15 is less than 30 mm, it is difficult to secure the joint strength when joining the upper connecting pipe 11 and the lower connecting pipe 12, and the pipe line is blocked when heated and expanded. There is not enough volume to do. If the height of the intermediate pipe 15 exceeds 150 mm, the upper end or the lower end of the intermediate pipe 15 protrudes above or below the floor slab S when the floor slab S is thin, and the horizontal pipe P3 is arranged near the floor. Becomes difficult. When the lower end of the intermediate pipe 15 is located below the through hole H, the amount of swelling to the lower part of the through hole H at the time of expansion increases, and the possibility of falling out of the through hole H increases.
If the height of the intermediate pipe 15 is in the range of 30 mm or more and 150 mm or less, the general floor slab thickness is 150 to 300 mm, and even if it is applied to a floor slab of any thickness, heat is generated during heating due to a fire or the like. The height is such that the purpose of expanding and blocking the pipeline can be achieved. Further, if the height is within this range, a floor slab having a general thickness can secure the joint strength, and the intermediate pipe 15 can be accommodated in the through hole H.

The lower connecting pipe 12 is composed of a pipe body whose diameter is reduced below the upper side. The lower connecting pipe 12 is located at the upper end thereof, and has a connecting pipe portion 16 connected to the lower end portion of the intermediate pipe 15 and a lower constricted inclined pipe portion 17 connected below the connecting pipe portion 16. A lower pipe portion 18 connected to the lower end portion of the inclined pipe portion 17 and to which a second vertical pipe P2 is connected is provided. The connecting pipe portion 16, the inclined pipe portion 17, and the lower pipe portion 18 are integrally formed by, for example, injection molding of a synthetic resin material.

The inner diameter of the connecting pipe portion 16 is larger than the outer diameter of the intermediate pipe 15. The lower part of the peripheral wall of the intermediate pipe 15 is fitted inside the connecting pipe portion 16. The outer diameter at the upper end of the inclined pipe portion 17 is smaller than the outer diameter of the connecting pipe portion 16. Therefore, the peripheral step portion 16a is formed at the boundary portion between the lower end portion of the connecting pipe portion 16 and the upper end portion of the inclined pipe portion 17.
The outer diameter at the lower end of the inclined pipe portion 17 is smaller than the outer diameter of the upper end portion of the inclined pipe portion 17.

The outer diameter of the lower pipe portion 18 is smaller than the outer diameter of the connecting pipe portion 16 and larger than the outer diameter of the lower end portion of the inclined pipe portion 17. The size of the lower pipe portion 18 in the central axis O direction is smaller than the size of the connecting pipe portion 16 in the central axis O direction. The second vertical pipe P2 on the lower floor is fitted to the inside of the lower pipe portion 18 from below, so that the second vertical pipe P2 is connected to the lower connecting pipe 12.

In addition to the upper connecting pipe 11, the lower connecting pipe 12 is also made of a transparent material or a translucent material. As a result, the connection state of the upper connection pipe 11 and the lower connection pipe 12 can be visually recognized from the outside. Further, it is desirable that a flame retardant such as aluminum hydroxide or magnesium hydroxide is blended in the upper connecting pipe 11 and the lower connecting pipe 12, and in order to maintain transparency, the volume average particle size of the flame retardant is 0. It is preferably 01 μm or more and 500 μm or less, more preferably 0.1 μm or more and 100 μm or less, and further preferably 0.5 μm or more and 10 μm or less. The volume average particle size is a value measured using a laser diffraction / scattering method particle size distribution measuring device.
The flame retardant is preferably a compound that has an endothermic action when heated and suppresses a temperature rise. For example, a compound that causes an endothermic reaction such as a dehydration reaction when heated can be used as the flame retardant.
Examples of such flame retardants include magnesium hydroxide, aluminum hydroxide, inorganic hydroxides such as kaolin minerals (kaolinite, haloysite, dikite) and hydrotalsalsite, sepiolite, bentonite, montmorillonite, talc, and mica. , Quartz, Zeolite, Wallastonite, Neferin Kaolinite and other water-absorbing inorganic compounds.
When the lower connecting pipe 12 is made transparent or translucent, a resin equivalent to the resin forming the upper connecting pipe 11 can be applied. In the present embodiment, both the upper connecting pipe 11 and the lower connecting pipe 12 are transparent or translucent, but the lower connecting pipe 12 may be formed of an opaque material.

A vertical bush 21, a vertical packing 22, and a vertical ring 23 are provided at the upper end of the upper connecting pipe 11 to which the first vertical pipe P1 is connected.
The vertical bush 21 includes a fitting portion 21a, a swivel blade 21b, and a swivel blade support leg portion 21c. The fitting portion 21a has a smaller diameter than the upper end portion of the vertical bush 21 and has a tubular shape that fits into the vertical pipe connecting portion 13 of the upper connecting pipe 11.

The swivel blade 21b has a projected area of the swivel blade 21b in the pipe axis direction of 5% to 30% of the internal cross-sectional area of the first vertical pipe P1 and an inclination angle of 20 ° to 50 °. As described above, it is supported by the swivel blade support leg portion 21c. The swivel blade support leg portion 21c has substantially the same width as the horizontal width of the swivel blade 21b and extends substantially from the lower end of the fitting portion 21a, and the lower end edge is inclined so as to follow the inclination of the swivel blade 21b. The swivel blade support leg 21c has a swivel blade support surface formed in an arc shape in cross section, and supports the swivel blade 21b slightly above the lower end edge.
Since the swivel blade 21b is applied when high drainage performance is required according to the scale of the building and the number of drainage fixtures, it may be omitted in the case of a building where high drainage performance is not required.

The vertical packing 22 is a packing made of a rubber material usually used for drainage facilities such as ethylene-propylene-diene rubber (EPDM). The vertical packing 22 has a lip portion 22a at the upper end portion which is watertightly adhered to the outer peripheral surface of the first vertical pipe P1, and the vertical bush 21 has an upper end surface that substantially coincides with the upper end surface of the vertical bush 21. It is fitted.
Further, as shown in FIG. 2, the lip portion 22a is provided so that the diameter gradually decreases toward the lower end side when the first vertical pipe P1 is not inserted. The upper end side of the lip portion 22a has a diameter substantially the same as or slightly larger than the outer diameter of the first vertical pipe P1, and the lower end side has a smaller diameter than the outer diameter of the first vertical pipe P1. At the lower end of the lip portion 22a, a step portion 22b protruding inward in the radial direction is formed. The pipe end portion of the first vertical pipe P1 abuts on the step portion 22b to absorb the thermal expansion and contraction of the first vertical pipe P1.

The vertical ring 23 is fitted onto the upper end of the vertical bush 21 and the flange portion 23a provided at one end of the vertical ring 23 prevents the vertical packing 22 from coming off from the vertical bush 21.
The vertical bushes 21 to 23 can be assembled and integrated in advance, and then the fitting portion 21a of the vertical bush 21 can be fitted to the vertical pipe connecting portion 13 of the upper connecting pipe 11 and adhered.

A horizontal bush 31, a horizontal packing 32, and a horizontal ring 33 are provided at the tip of the horizontal pipe connecting portion 14 that connects the horizontal pipe P3.
One end of the lateral bush 31 is fitted and adhered to the lateral pipe connecting portion 14 of the upper connecting pipe 11, and an enlarged diameter portion is formed at the other end.

The horizontal packing 32 is made of a rubber material such as ethylene-propylene-diene rubber (EPDM), which is usually used for drainage facilities. The lateral packing 32 is fitted to the other end of the lateral bush 31 with an expanded diameter, and is in close contact with the outer peripheral surface of the lateral pipe P3 in a watertight manner.

The horizontal ring 33 is fitted onto the enlarged diameter portion of the horizontal bush 31, and the flange portion 33a provided at one end of the horizontal ring 33 prevents the horizontal packing 32 from being detached from the vertical ring 23.
Further, the vertical bush 21, the vertical ring 23, the horizontal bush 31, and the horizontal ring 33 all contain 0.1 to 1.0 parts by weight of non-expandable graphite with respect to 100 parts by weight of the polyvinyl chloride resin. It is obtained by injection molding the polyvinyl chloride resin composition contained in.
The vertical bush 21, the vertical ring 23, the horizontal bush 31, and the horizontal ring 33 may be made transparent or translucent by using the same transparent or translucent polyvinyl chloride resin as the upper connecting pipe 11. In this case, it can be confirmed whether the vertical pipe P1 and the horizontal pipe P3 are inserted to appropriate positions.

The inner surface of the horizontal bush 31 and the outer surface of the horizontal pipe P3 may be adhered with an adhesive without providing the horizontal packing 32, and the vertical bush 21, the vertical ring 23, the horizontal bush 31, and the horizontal ring 33 are transparent. When set to, it is possible to confirm from the outside whether or not the adhesive is applied.

"Installation of drainage collective joint"
As shown in FIG. 1, the drainage collective joint 10 as described above is used for the horizontal branch pipe confluence of each floor of the drainage vertical pipeline of a multi-story building, and is constructed as follows.
That is, the portion including the fitting connection portion of the lower connecting pipe 12, the intermediate pipe 15, and the upper connecting pipe 11 is installed so as to face the through hole H of the floor slab S, and the second vertical pipe on the lower floor is installed. P2 (for example, a commercially available Eslon fireproof VP pipe manufactured by Sekisui Chemical Industry Co., Ltd. can be used) is fitted and bonded to the lower pipe portion 18 of the lower connecting pipe 12. At the time of this installation, the upper end of the lower connecting pipe 12, the intermediate pipe 15, and the lower end of the upper connecting pipe 11 are housed inside the through hole H.
Further, the lower end portion of the first vertical pipe P1 on the upper floor is fitted to the vertical packing 22 via the vertical ring 23.

Next, the through hole H of the floor slab S is filled with a sound insulating material M such as mortar or rock wool, and the portion including the upper end portion of the lower connecting pipe 12, the intermediate pipe 15, and the lower end portion of the upper connecting pipe 11 is filled with the sound insulating material M. Buried inside. In the lower connecting pipe 12, the upper end of the inclined pipe portion 17 and the connecting pipe portion 16 are embedded in the sound insulating material M. A portion (lower end portion 9) of the upper connecting pipe 11 below the lower end portion of the horizontal pipe connecting portion 14 is embedded in the sound insulating material M. It is preferable to use the sound insulating material M of the mortar in consideration of the residual retention in the event of a fire or the like.
Then, the end of the horizontal pipe P3 is inserted into the horizontal bush 31 via the horizontal ring 33 and the horizontal packing 32 to connect the horizontal pipe P3.

The drainage collective joint 10 of the present embodiment has the structure described above, and the intermediate pipe 15 is embedded inside the through hole H of the floor slab S in a state of being surrounded by the sound insulating material M. Further, the lower end 9 of the upper connecting pipe 11 located outside the intermediate pipe 15, the upper end of the inclined pipe 17, and the connecting pipe 16 are also inside the through hole H of the floor slab S in a state of being surrounded by the sound insulating material M. It is buried in.

With this structure, since the upper connecting pipe 11 is transparent or translucent, even if miscellaneous items such as towels flow into the drainage collective joint 10 and cause clogging or abnormality, the clogged portion occurs. , The abnormal part can be easily seen from the outside. Further, since the lower connecting pipe 12 is also transparent or translucent in addition to the upper connecting pipe 11, most of the drainage collective joint 10 can be made visible from the outside, and the clogged portion and the abnormal occurrence portion of the miscellaneous matter can be seen. It will be easily visible. With this structure, internal abnormalities such as clogging of the drainage collective joint 10 can be confirmed without using a large-scale device or instrument such as an in-pipe camera. Therefore, when an internal abnormality occurs, countermeasures can be taken promptly.
Further, when the intermediate pipe 15 is set to 150 mm or less, the side surface of the intermediate pipe 15 may be covered with the lower end portion 9 of the upper connecting pipe 11 and the connecting pipe portion 16 of the lower connecting pipe 12 and may not be exposed to the outside. Since the upper connecting pipe 11 is transparent or translucent, the existence of the intermediate pipe 15 can be confirmed from the outside through the upper connecting pipe 11.

Further, in the case of the above-mentioned structure, when a fire breaks out on the lower floor and the through hole H and its surrounding portion are heated by the flame, the heat-expandable graphite contained in the intermediate pipe 15 expands. Then, the expanded intermediate pipe 15 closes the lower end of the upper connecting pipe 11 or the upper end of the lower connecting pipe 12. Therefore, it prevents the inflow of flames and smoke from the lower floors to the upper floors, and exerts the effect of preventing the spread of fire.

On the premise that the lower connecting pipe 12 melts down due to the heat of a fire, even if it melts down, the intermediate pipe 15 can expand and close the through hole H. Therefore, the through hole H can be reliably closed in the event of a fire, and the effect of preventing the spread of fire is exhibited.

In the structure provided with the drainage collective joint 10 shown in FIG. 1, the intermediate pipe 15 having a height of 30 mm or more and 150 mm or less is inserted in the through hole H regardless of the thickness of the floor slab S of 150 to 300 mm. Can be reliably placed in. Therefore, the structure shown in FIG. 1 can be applied to the floor slab S having any thickness. Therefore, the structure of the present embodiment can be widely applied to any general slab-thick building, and is excellent in versatility.

In the structure shown in FIG. 1, since the inclined pipe portion 17 having a downward constriction is provided below the connecting pipe portion 16, the inclined pipe portion 17 is securely gripped by the sound insulating material M, and as a result, a flame or the like is used. Even when heated, the connecting pipe portion 16 can be reliably prevented from falling.
Further, since the peripheral step portion 16a is provided at the lower end of the connecting pipe portion 16, when the intermediate pipe 15 expands in the event of a fire, the peripheral step portion 16a is surely caught by the sound insulating material M. Therefore, it is possible to prevent the lower connecting pipe 12 from melting down and falling, the through hole H can be reliably closed by the expansion of the intermediate pipe 15, and the fire resistance can be reliably exhibited.

"Second embodiment"
FIG. 4 is a cross-sectional view showing an example of a drainage collective joint according to a second embodiment of the present invention.
In the second embodiment, the intermediate pipe 50 having a structure different from that of the intermediate pipe 15 applied to the first embodiment is provided. The intermediate pipe 50 of this embodiment has the same inner and outer diameters, heights, thicknesses, shapes, etc. as the previous intermediate pipe 15, but is made of a resin containing no heat-expandable graphite, for example, a polyvinyl chloride resin. ..
Alternatively, it is composed of a polyvinyl chloride resin composition containing non-expandable graphite in a ratio of about 0.1 to 1.0 part by weight with respect to 100 parts by weight of the polyvinyl chloride resin.

Further, the outer circumference of the lower end 9 of the upper connecting pipe 11 located outside the intermediate pipe 50 and the outer circumference of the connecting pipe 16 located outside the intermediate pipe 50 are heat-expandable refractory such as heat-expandable graphite. It is characterized in that a fireproof layer 51 made of a material is provided. As the refractory layer 51, a multilayer structure formed by winding a heat-expandable fire-resistant sheet or tape containing heat-expandable graphite can be adopted.

The refractory layer 51 is made of the same material as the intermediate pipe 15 of the first embodiment.
That is, it may be a single-layer structure composed entirely of a resin composition containing a heat-expandable refractory material, or a multi-layer structure composed of a plurality of layers. In the case of a multi-layer structure, any layer may be formed from a resin composition containing a heat-expandable refractory material. Alternatively, it may be a refractory layer having a multi-layer structure by winding a refractory sheet having a single-layer structure made of a resin composition containing a heat-expandable refractory material. Among these, a structure in which a fireproof sheet is wrapped is preferable because it is easy to carry out at the construction site.

The refractory layer 51 of the present embodiment is formed at the same height as the intermediate pipe 15 of the previous embodiment.
That is, the refractory layer 51 is formed at a height of 30 mm or more and 150 mm or less.
Since the other structures are the same as the structures of the first embodiment, the description of the other structures will be omitted.

When the structure of the second embodiment is applied to the floor slab S having the structure shown in FIG. 1, the refractory layer 15 is embedded inside the through hole H. The intermediate pipe 50 does not expand even if it is heated in the event of a fire, but the heat-expandable graphite contained in the refractory layer 51 expands.
The refractory layer 15 heated at the time of fire expands so as to crush the lower end 9 of the upper connecting pipe 11 softened by heat, the connecting pipe 16 and the intermediate pipe 15 and closes the through hole H. Therefore, fire resistance can be exhibited.

Even in the structure of the second embodiment, the action and effect of visually recognizing the inside of the upper connecting pipe 11 and the inside of the lower connecting pipe 12 from the outside are the same.

FIG. 5 is a cross-sectional view showing an example of a drainage collective joint according to a third embodiment of the present invention.
The structure of the third embodiment is characterized in that a sound insulating cover 57 composed of a sound absorbing layer 55 and a sound insulating layer 56 is provided on the outer peripheral surface of the drainage collective joint 10. Specifically, the sound insulation cover 57 is formed in the upper connecting pipe 11 from the outer circumference of the lower position of the attachment portion of the vertical ring 23 to the outer circumference of the lower end portion 9 of the upper connecting pipe 11. In the form of FIG. 5, the sound absorbing layer 55 and the sound insulating layer 56 are formed so as to exclude the protruding portion of the horizontal pipe connecting portion 14.
For the sound insulation cover 57, for example, a configuration in which a sound insulation tape is wrapped around the outer periphery of the sound absorption layer 55 to form the sound insulation layer 56 can be adopted at the installation site. Alternatively, a configuration may be adopted in which the sound insulation cover 57 is attached in advance after the drainage collective joint 10 is manufactured at the factory and before the factory shipment.

The sound insulation layer 56 can be formed by winding a sheet of soft vinyl chloride, butyl rubber or polypropylene (PP) (thickness 0.8 to 2.2 mm). For the sound absorbing layer 55, polyester fiber, urethane foam, or glass wool (thickness 5 to 20 mm) can be applied.

In the structure shown in FIG. 5, since the sound absorbing layer 55 and the sound insulating layer 56 are provided on the outer peripheral surface of the drainage collecting joint 10, it is possible to prevent the drainage sound flowing inside the drainage collecting joint 10 from leaking to the outside.
For example, it is possible to prevent the drainage sound from leaking to the living room side along the floor slab S.
In the case of this configuration, since the sound insulation layer 56 can be removed by removing the sound insulation tape, the sound absorption layer 55 can also be removed by removing the sound insulation layer 56.

In the structure of the third embodiment, when the drainage collecting joint 10 is clogged with drainage, the inside of the drainage collecting joint 10 can be visually recognized by removing the sound insulation cover 57, and the clogging can be found anywhere in the drainage collecting joint 10. It will be easy to grasp whether it is occurring. Therefore, it is possible to take measures to eliminate the clogging at the required position.

The technical scope of the present invention described above is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
In addition, it is possible to replace the components in the above-described embodiment with well-known components as appropriate without departing from the spirit of the present invention, and the above-described embodiments may be appropriately combined.

1 ... Structure of drainage collective joint,
10 ... Drainage collective joint,
11 ... Upper connection pipe,
12 ... Lower connection pipe,
13 ... Vertical pipe connection,
15 ... Intermediate pipe,
16 ... Connection pipe,
17 ... Inclined pipe part,
21b ... Swivel blade,
50 ... Intermediate pipe,
51 ... Fireproof layer,
55 ... Sound absorbing layer,
56 ... Sound insulation layer 57 ... Sound insulation cover,
H ... Through hole,
M ... Sound insulation material (mortar),
S ... Floor slab.

Claims (6)

It is a drainage collective joint that includes an upper connecting pipe that connects to the vertical pipe on the upper floor and a lower connecting pipe that connects to the vertical pipe on the lower floor, and is installed in the through hole of the floor slab.
The lower end of the upper connecting pipe and the upper end of the lower connecting pipe are arranged in the through holes of the floor slab.
A fireproof sheet having a height of 30 mm or more and 150 mm or less is wrapped around the outer circumference of the lower connecting pipe at a position inside the through hole of the floor slab.
The upper connecting pipe has a vertical pipe connecting portion that can be connected to a vertical pipe and a plurality of horizontal pipe connecting portions that can be connected to a horizontal pipe, and is made of a transparent material or a translucent material.
A horizontal bush having an enlarged diameter portion in which packing is arranged is fitted and adhered to the horizontal pipe connecting portion.
A vertical bush having an enlarged diameter portion in which packing is arranged is fitted and adhered to the vertical pipe connecting portion.
The lateral bush is formed of a transparent or translucent material and
The lower connecting pipe is connected to a connecting pipe portion, a lower constricted inclined pipe portion connected below the connecting pipe portion, and a lower end portion of the inclined pipe portion, and a vertical pipe on the lower floor is connected. With a lower pipe part,
A drainage collective joint characterized in that the fireproof sheet is wound around the outer periphery of the lower connecting pipe above the inclined pipe portion. It is a drainage collective joint that includes an upper connecting pipe that connects to the vertical pipe on the upper floor and a lower connecting pipe that connects to the vertical pipe on the lower floor, and is installed in the through hole of the floor slab.
The lower end of the upper connecting pipe and the upper end of the lower connecting pipe are arranged in the through holes of the floor slab.
A fireproof sheet having a height of 30 mm or more and 150 mm or less is wrapped around the outer circumference of the lower connecting pipe at a position inside the through hole of the floor slab.
The upper connecting pipe has a vertical pipe connecting portion that can be connected to the vertical pipe and a plurality of horizontal pipe connecting portions that can connect the horizontal pipe.
Wherein the lateral pipe connecting portion, the lateral bushing having a enlarged diameter portion of the packing therein is disposed is fitted bonded,
A vertical bush having an enlarged diameter portion in which packing is arranged is fitted and adhered to the vertical pipe connecting portion.
The lateral bush is formed of a transparent or translucent material and
The lower connecting pipe is connected to a connecting pipe portion, a lower constricted inclined pipe portion connected below the connecting pipe portion, and a lower end portion of the inclined pipe portion, and a vertical pipe on the lower floor is connected. With a lower pipe part,
A drainage collective joint characterized in that the fireproof sheet is wound around the outer periphery of the lower connecting pipe above the inclined pipe portion. It is a drainage collective joint that includes an upper connecting pipe that connects to the vertical pipe on the upper floor and a lower connecting pipe that connects to the vertical pipe on the lower floor, and is installed in the through hole of the floor slab.
The lower end of the upper connecting pipe and the upper end of the lower connecting pipe are arranged in the through holes of the floor slab.
A fireproof sheet having a height of 30 mm or more and 150 mm or less is wrapped around the outer circumference of the lower connecting pipe at a position inside the through hole of the floor slab.
The upper connecting pipe has a vertical pipe connecting portion that can be connected to a vertical pipe and a plurality of horizontal pipe connecting portions that can be connected to a horizontal pipe, and is made of a transparent material or a translucent material.
A horizontal bush is fitted and adhered to the horizontal pipe connection portion.
A vertical bush having an enlarged diameter portion in which packing is arranged is fitted and adhered to the vertical pipe connecting portion.
The lower connecting pipe is connected to a connecting pipe portion, a lower constricted inclined pipe portion connected below the connecting pipe portion, and a lower end portion of the inclined pipe portion, and a vertical pipe on the lower floor is connected. With a lower pipe part,
A drainage collective joint characterized in that the fireproof sheet is wound around the outer periphery of the lower connecting pipe above the inclined pipe portion. The drainage collective joint according to any one of claims 1 to 3, wherein a removable sound insulating cover is attached to at least the outer periphery of the upper connecting pipe of the upper connecting pipe and the lower connecting pipe. The drainage collective joint according to claim 4, wherein the sound insulation cover is attached to the outer periphery of the upper connecting pipe excluding the horizontal pipe connecting portion. The drainage collective joint according to any one of claims 1 to 5, wherein the vertical bush is formed of a transparent material or a translucent material.

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