JP7352824B2 - Drainage connection parts - Google Patents

Description

The present invention relates to a drainage connection member, and in particular, a tubular drainage connection member connected between the downstream end of a drainage channel of a flush toilet and the upstream end of a drainage pipe on the side of a building in which the flush toilet is installed. Regarding.

When installing a flush toilet, which is a sanitary device, inside an apartment complex or detached house, it must meet the provisions of laws such as the Fire Service Act. In other words, if a flushing toilet is installed indoors, the flushing toilet should be If PVC drain sockets, rubber packing, etc. are made of noncombustible materials and are used at the connection between the building side drain pipe and the flush toilet, these should be made of noncombustible materials such as flush toilets and flooring materials. It is necessary that it be covered with

For this reason, in the flush toilet described in Patent Document 1, the downstream end opening of the toilet drain pipe section located in the pedestal part and the upstream end opening of the building side drain pipe are connected by a drainage connecting member, and the The opening of the pedestal on the building side through which the connecting member passes is covered by a shielding member made of a noncombustible material. As a result, the flush toilet of Patent Document 1 is made of ceramic (non-combustible), and the drainage connecting member is covered by a shielding member made of a non-combustible material, making it a fire-resistant flush toilet. .

Furthermore, in the flush toilet described in Patent Document 2, the downstream end of the toilet drainage pipe and the upstream end of the building drainage pipe are connected by a drainage connecting member, and the outer surface of the drainage connecting member is made fireproof. I try to cover it with sexual material. As a result, the flush toilet of Patent Document 2 is also made of ceramic (nonflammable), and the outer surface of the drainage connection member is covered with a fire-resistant material, making it a fire-resistant flush toilet. .

Japanese Patent Application Publication No. 2011-256707 Japanese Patent Application Publication No. 2012-219557

However, in the flush toilet of Patent Document 1 mentioned above, the shape of the flush toilet is changed in order to cover the opening of the pedestal made of non-combustible ceramic with a shielding member made of a non-combustible material in order to make it fireproof. It is necessary to design a shielding member each time the
Furthermore, in the flush toilet of Patent Document 2, it is necessary to cover the entire length of the outer surface of the drainage connecting member with a fire-resistant material, so there is room for improvement in terms of cost.

The present invention has been made in order to solve the problems of the prior art described above, and provides a drainage connecting member that can be applied and made fireproof even if the shape of the flush toilet is changed. is intended to provide.

In order to achieve the above object, the present invention provides a tubular drainage connecting member connected between the downstream end of a drainage channel of a flush toilet and the upstream end of a drainage pipe on the side of a building in which the flush toilet is installed. The drainage connection member includes an outer layer provided on the outside, an inner layer provided on the inside, and an intermediate layer sealed between the outer layer and the inner layer, and the intermediate layer is It is made of a fire-resistant thermally expandable resin composition.
In the present invention configured as described above, since the drainage connecting member used in the flush toilet includes an intermediate layer formed of a fire-resistant thermally expandable resin composition, the shape of the flush toilet does not change. However, flush toilets can be installed with fireproof specifications.
Furthermore, in the present invention, since the fire-resistant thermally expandable resin composition is sealed as an intermediate layer between the outer layer and the inner layer, it does not come into contact with water or air, so there is no possibility that the composition will deteriorate. There is no.
Furthermore, in the present invention, since the drainage connecting member is tubular, the fire-resistant thermally expandable resin composition expands toward the inside of the drainage pipe on the building side, so that it expands uniformly inward from the circumferential direction, thereby The inside (inner diameter) of the tubular drainage connecting member can be reliably closed.

In the present invention, preferably, the drainage connection member includes a small diameter portion that is inserted into a drainage pipe on the building side, and a large diameter portion that is connected to the downstream end of the drainage channel of the flush toilet.
In the present invention configured as described above, the fire-resistant thermally expandable resin composition in the intermediate layer of the small diameter portion inserted into the drainage pipe of the drainage connecting member expands, so the expansion distance is shortened and the tubular drainage is reliably completed. The inside (inner diameter) of the connecting member can be closed.

In the present invention, preferably, the intermediate layer is provided in at least a portion of the small diameter portion.
In the present invention configured as described above, since the intermediate layer need only be provided in at least a part of the small diameter portion, the amount of the fire-resistant thermally expandable resin composition can be reduced, and the cost can be reduced accordingly.

In the present invention, preferably, the drainage connecting member further includes a radially extending connecting portion connecting the small diameter portion and the large diameter portion, and this connecting portion is also provided with an intermediate layer.
In the present invention configured as described above, since the intermediate layer is also provided at the connecting portion of the drain connecting member, the inside of the drain connecting member can be more reliably closed.

In the present invention, preferably, the intermediate layer of the drainage connecting member is provided over the entire area along the axis of the small diameter portion.
In the present invention configured as described above, since the intermediate portion of the drain connecting member is provided over the entire area along the axis of the small diameter portion, the interior of the drain connecting member can be more reliably closed.

In the present invention, preferably, an intermediate layer is provided over the entire area of the drainage connection member.
In the present invention configured as described above, since the intermediate layer is provided over the entire area of the drain connecting member, the inside of the drain connecting member can be more reliably closed.

The present invention preferably further includes an adjustment pipe embedded in a gap existing between the outer circumferential side of the small diameter portion of the drainage connecting member and the inner circumferential side of the drainage pipe on the building side into which the small diameter portion is inserted. , this regulating tube has a sealed intermediate layer inside it.
In the present invention configured as described above, even if a gap exists between the outer circumferential side of the small diameter part of the drainage connecting member and the inner circumferential side of the drainage pipe on the building side into which this small diameter part is inserted, this Since the adjustment pipe is embedded in the gap, the same drainage connection member can be used even if the inner diameter of the drainage piping on the building side differs. Furthermore, since the intermediate layer has a double structure of the small diameter portion of the drainage connection member and the adjustment pipe, the inside of the drainage connection member can be more reliably closed.

According to the drainage connection member of the present invention, even if the shape of the flush toilet is changed, it can be applied to make it fireproof.

FIG. 1 is a sectional view showing a floor-standing type flush toilet to which a drainage connection member according to a first embodiment of the present invention is applied. FIG. 2 is a sectional view showing the drain connection member and drain socket shown in FIG. 1; FIG. 2 is a sectional view showing the drainage connection member shown in FIG. 1; FIG. 2 is a perspective view showing a state in which the fire-resistant thermally expandable resin composition provided in the drainage connection member according to the first embodiment of the present invention is expanded by heat. It is a sectional view showing a drainage connecting member and a drainage socket according to a modification of the first embodiment of the present invention. FIG. 6 is a sectional view showing the drainage connection member shown in FIG. 5; FIG. 3 is a sectional view showing a wall drainage type flush toilet to which a drainage connection member according to a second embodiment of the present invention is applied. FIG. 8 is a sectional view showing the drain connection member and drain socket shown in FIG. 7; FIG. 8 is a sectional view showing the drainage connection member shown in FIG. 7; 10 is a sectional view showing a pipe connection member in another example of the embodiment shown in FIG. 9. FIG. It is a sectional view showing a drainage connecting member and a drainage socket according to a modification of the second embodiment of the present invention. FIG. 12 is a sectional view showing the drainage connection member shown in FIG. 11;

A drainage connection member according to an embodiment of the present invention will be described with reference to the drawings. First, referring to FIG. 1, a floor-standing type flush toilet to which a drainage connection member according to a first embodiment of the present invention is applied will be described. FIG. 1 is a sectional view showing a floor-standing type flush toilet to which a drainage connection member according to a first embodiment of the present invention is applied.

As shown in FIG. 1, the flush toilet 1 is a floor-standing flush toilet, and includes a toilet body 2 and a toilet lid 4 disposed above the toilet body 2. This flush toilet 1 is installed on a floor 8 of a building 6. A drainage pipe 10 extending from below to above is attached to this floor 8, and this drainage pipe 10 is connected to the toilet main body 2, as will be described in detail later.

The toilet main body 2 of the flush toilet 1 has a built-in water tank 12 on the rear side, and above the water storage tank 12, a functional section 14 is arranged. This functional unit 14 incorporates a sanitary washing device (not shown) for washing the private parts of the user and a water supply device (not shown) for supplying washing water to the toilet main body 2. A bowl part 16 is provided on the front side of the toilet main body 2, and this bowl part 16 has a bowl-shaped waste receiving surface 18 for receiving waste, and a rim part 20 provided on the upper end side of this waste receiving surface 18. It is equipped with

A drain trap pipe line 24 is connected to the lower end of the bowl part 16, and the drain trap pipe line 24 has an inlet 24a that opens toward the lower end of the bowl part 16, and a rising pipe that rises rearward from the inlet 24a. It includes a conduit 24b and a descending conduit 24c extending downward from the downstream end of the ascending conduit 24b.

A rim spout 22 is provided on the inner circumferential surface of the rim portion 20 of the bowl portion 16, and cleaning water is spouted rearward from the rim spout 22, forming a swirling flow that swirls on the dirt receiving surface 18. It is supposed to be done. This rim spout 22 is supplied with cleaning water from a water supply source (not shown).

Further, a jet spout 28 is formed at the lower end of the bowl portion 16, and washing water is spouted from the jet spout 28 toward the inlet 24a and the rising pipe 24b of the drain trap pipe line 24, thereby causing the drain trap The inside of the conduit 24 becomes full of water and a siphon effect occurs. Washing water in the water storage tank 12 is supplied to the jet spout 28 via a pump (not shown).

A drain socket 30 is attached to the downstream end of the descending pipe 24c of the drain trap pipe 24. This drainage socket 30 has a constricted portion formed in a part of its internal flow path, so that the inside of the drainage trap pipe 24 is filled with water so that a siphon effect can be generated quickly.

A drainage connection member 34 according to the present embodiment is arranged on the downstream end side of the drainage socket 30. The lower part of the drainage connection member 34 is inserted into the upper end of the drainage pipe 10 disposed on the floor 8 of the building 6 mentioned above. This drain connection member 34 allows the waste on the waste receiving surface 18 of the bowl portion 16 of the toilet main body 2 to be discharged into the drain pipe 10 via the drain trap pipe 24 and the drain socket 30.

Next, the drainage connection member 34 according to this embodiment will be described in detail with reference to FIGS. 2 and 3. FIG. 2 is a sectional view showing the drainage connection member and drainage socket shown in FIG. 1, and FIG. 3 is a sectional view showing the drainage connection member shown in FIG. 1.

First, as shown in FIG. 2, the drain socket 30 includes a drain socket main body 30a that forms an internal flow path, a packing 30b attached to the upstream end of the drain socket main body 30a, and a drain socket main body 30a that is placed on the floor 8. The base portion 30c is provided for placement on the base portion 30c.

Next, as shown in FIGS. 2 and 3, the drainage connection member 34 is a tubular structure, and has a large diameter part 36 at the top and a small diameter part 38 at the bottom. The lower end and the upper end of the small diameter portion 38 are connected by a connecting portion 40 extending in the radial direction. The large diameter portion 36, the small diameter portion 38, and the connecting portion 40 have an integral structure and are made of a refractory material to be described later.

The large diameter portion 36, the small diameter portion 38, and the connecting portion 40 of the drainage connection member 34 each include an outer layer 34a and an inner layer 34b. The small diameter portion 38 of this drainage connection member 34 is inserted into the upper end of the drainage pipe 10 disposed on the floor 8 of the building 6 mentioned above.
The outer layer 34a and the inner layer 34b (that is, the parts other than the intermediate layer 42 described later) of the drainage connection member 34 are made of a fire-resistant (non-combustible) polyvinyl chloride resin that does not contain thermally expandable graphite. .

The small diameter portion 38 of the drainage connection member 34 includes the above-described outer layer 34a and inner layer 34b, and an intermediate layer 42 made of a fire-resistant thermally expandable resin composition is provided between the outer layer 34a and the inner layer 34b. It is provided. This intermediate layer 42 is sealed by the outer layer 34a and the inner layer 34b so as not to come into contact with outside air or cleaning water. This intermediate layer 42 is made of a fire-resistant thermally expandable resin composition, expands with heat, and closes the internal passage of the small diameter portion 38.

Here, the intermediate layer 42 made of a fire-resistant thermally expandable resin composition is provided over the entire area along the axis of the small diameter portion 38, but it may also be provided only in a part of the small diameter portion 38. good. Further, the intermediate layer 42 may be provided in a sealed manner between the outer layer 34a and the inner layer 34b of the small diameter portion 38 and the connecting portion 40. It may be provided in a sealed manner between all the outer layers 34a and inner layers 34b (that is, the entire area of the drain connection member 34).

The fire-resistant thermally expandable resin composition of this intermediate layer 42 is not particularly limited, but preferably contains thermally expandable graphite in a proportion of 1 to 15 parts by weight based on 100 parts by weight of the polyvinyl chloride resin. It is more preferably contained in a proportion of 1 to 12 parts by weight, and still more preferably contained in a proportion of 2 to 10 parts by weight. In other words, if the amount of thermally expandable graphite is less than 1 part by weight, sufficient thermal expandability will not be obtained during combustion and the desired fire resistance will not be obtained; if it exceeds 15 parts by weight, heating Due to excessive thermal expansion, the shape cannot be maintained and the residue may fall off, resulting in a decrease in fire resistance.

The thermally expandable graphite of the above-mentioned fire-resistant thermally expandable resin composition is produced by mixing powders such as natural scale graphite, pyrolytic graphite, and quiche graphite with inorganic acids such as concentrated sulfuric acid, nitric acid, and selenic acid, and concentrated nitric acid, perchloric acid, and perchloric acid. A layered carbon structure obtained by acid treatment with a strong oxidizing agent such as chlorate, permanganate, dichromate, hydrogen peroxide, etc. to insert an inorganic acid between the layers of graphite, and then adjusting the pH. It is possible to use thermally expandable graphite, which is a crystalline compound that maintains a pH of 1.5 to 4.0, and thermally expandable graphite whose 1.3 times expansion temperature is 180°C to 240°C. preferable. In other words, if the pH of thermally expandable graphite is less than 1.5, it is too acidic and tends to cause corrosion of the molding equipment, and if the pH exceeds 4.0, the effect of promoting carbonization of polyvinyl chloride resin is There is a risk that the material will fade and sufficient fire resistance performance will not be obtained.

Next, the drainage pipe 10 is a fire-resistant two-layer pipe, the outer peripheral part 10a is made of concrete, and the inner peripheral part 10b is made of fire-resistant (non-combustible) thermally expandable graphite-free polyvinyl chloride resin. It is made.

Next, the effects of the drain connection member according to the first embodiment of the present invention described above will be explained. Here, FIG. 4 is a perspective view showing a state in which the fire-resistant thermally expandable resin composition provided in the drainage connection member 34 according to the present embodiment is expanded by heat.

In this embodiment, the drainage connection member 34 includes an outer layer 34a provided on the outside, an inner layer 34b provided on the inside, and an intermediate layer 42 sealed between the outer layer 34a and the inner layer 34b. Since the intermediate layer 42 is made of a fire-resistant thermally expandable resin composition, even if the shape of the flush toilet changes, the flush toilet can be installed in a fire-resistant manner. In addition, in this embodiment, the fire-resistant thermally expandable resin composition is sealed as an intermediate layer between the outer layer and the inner layer, so it does not come into contact with water or air, so the composition does not deteriorate. Never. Furthermore, in this embodiment, since the drainage connecting member is tubular, it is heated by flame etc. in the event of a fire and the fire-resistant thermally expandable resin composition expands toward the inside of the pipe, so the expansion distance is shortened and the The inside (inner diameter) of the tubular drainage connection member can be closed. As a result, according to the present embodiment, a fireproof specification is achieved that can reliably prevent flames and smoke caused by a fire from being discharged to the outside via the drainage pipe.

In this embodiment, the drainage connection member 34 connects a small diameter portion 38 that is inserted into the drainage pipe 10 on the building side and a descending pipe of the drainage trap pipe 24 of the toilet main body 2 of the flush toilet 1 via the drainage socket 30. The fire-resistant thermally expandable resin composition of the intermediate layer 42 of the small diameter portion 38 that is inserted into the drainage pipe 10 of the drainage connection member 34 expands, so that the expansion distance becomes shorter, and the inside (inner diameter) of the tubular drainage connecting member can be reliably closed.

In the present embodiment, since it is only necessary to provide it in at least a part of the small diameter portion 38 of the drainage connecting member 34, the amount of the fire-resistant thermally expandable resin composition can be reduced, and the cost can be reduced accordingly.

In this embodiment, the drainage connecting member 34 includes a connecting portion 40 extending in the radial direction that connects the small diameter portion 38 and the large diameter portion 36, and this connecting portion 40 is also provided with the intermediate layer 42. The interior of the drain connection member 34 can be reliably closed.

In this embodiment, since the intermediate layer 42 of the drainage connection member 34 is provided over the entire area along the axis of the small diameter portion 38, the interior of the drainage connection member 34 can be more reliably closed.

In this embodiment, since the intermediate layer is provided over the entire area of the drainage connection member, the interior of the drainage connection member can be more reliably closed.

Next, a drainage connection member according to a modification of the first embodiment of the present invention will be described with reference to FIGS. 5 and 6. FIG. 5 is a sectional view showing a drainage connection member and a drainage socket according to a modification of the first embodiment of the present invention, and FIG. 6 is a sectional view showing the drainage connection member shown in FIG. 5.
The basic structure of the drainage connection member 44 according to this modification is the same as that of the drainage connection member 34 shown in FIGS. 2 and 3 described above, so the different parts will mainly be explained here.

First, a plurality of different pipe diameters are set for the drainage pipes provided in an apartment complex and a detached house, and for example, the inner diameter of the drain pipe 10 of one detached house may be larger than that of the other detached house. This modification is intended to deal with the fact that the inner diameter of the drainage pipe 10 differs depending on the building.

For this reason, the drainage connection member 44 according to this modification includes an adjustment pipe (adapter) 46 in addition to the above-mentioned large diameter portion 36, small diameter portion 38, and connection portion 40. When the inner diameter of the drainage pipe 10 is large, a gap exists between the outer circumferential side of the small diameter part 38 and the inner circumferential side of the drainage pipe 10 on the building side into which this small diameter part 38 is inserted, so the adjustment pipe is inserted into this gap. 46 is embedded. Further, like the small diameter portion 38 described above, this adjustment tube 46 also includes an outer layer 46a, an inner layer 46b, and an intermediate layer 42 sealed between the outer layer 46a and the inner layer 46b. .

In the drainage connection member 44 according to the present modification described above, the adjustment pipe 46 is inserted into the gap that exists between the outer circumference of the small diameter portion 38 and the inner circumference of the drainage pipe 10 on the building side into which the small diameter portion 38 is inserted. Since it is embedded, even if the inner diameter of the drainage pipe 10 on the building side is different, the same drainage connection member can be used. Furthermore, since the intermediate layer 42 has a double structure provided in both the small diameter portion 38 of the drainage connection member 44 and the adjustment pipe 46, the interior of the drainage connection member 44 can be more reliably closed. In addition, in this modification, the intermediate layer 42 is provided in both the drainage connection member 44 and the regulator 46 for the purpose of reliably blocking the drainage pipe 10 on the building side. An intermediate layer 42 may also be provided.

Next, with reference to FIG. 7, a flush toilet to which a drainage connection member according to a second embodiment of the present invention is applied will be described. FIG. 7 is a sectional view showing a wall drainage type flush toilet to which a drainage connection member according to a second embodiment of the present invention is applied.

The basic structure of this second embodiment is the same as that of the first embodiment described above, so the different parts will mainly be explained.
As shown in FIG. 7, the flush toilet 50 is a wall drainage type flush toilet, and the flush toilet 50 is installed on the floor 8 of the building 6, and discharges flush water from the wall 52. . A drain pipe 54 extending laterally is attached to this wall 52, and this drain pipe 54 is connected to the toilet main body 2.

A drain socket 60 is attached to the downstream end of the descending pipe 24c of the drain trap pipe 24. The drain socket 60 has an internal flow path bent from the vertical direction to the horizontal direction at a substantially right angle, so that the drain trap pipe 24 is filled with water, so that the siphon action can be generated quickly.

A drainage connection member 64 according to this embodiment is arranged on the downstream end side of the drainage socket 60. This drainage connection member 64 extends in the lateral direction, and its downstream side is inserted into the upstream end of the drainage pipe 54 disposed in the wall 52 of the building 6 mentioned above. This drain connecting member 64 allows the waste on the waste receiving surface 18 of the bowl portion 16 of the toilet main body 2 to be discharged to the drain pipe 54 via the drain trap pipe 24 and the drain socket 60.

Next, the drainage connection member 64 according to this embodiment will be described in detail with reference to FIGS. 8 and 9. 8 is a sectional view showing the drainage connection member and drainage socket shown in FIG. 7, and FIG. 9 is a sectional view showing the drainage connection member shown in FIG. 7.

First, as shown in FIG. 8, the drain socket 60 includes a drain socket main body 60a that forms an internal flow path, a packing 60b attached to the upstream end of the drain socket main body 60a, and a drain socket main body 60a that is placed on the floor 8. The drain socket body 60b includes a base portion 60c for placement therein, and a packing 60d attached to the downstream end side of the drain socket body 60b.

Next, as shown in FIGS. 8 and 9, the drainage connection member 64 is a tubular structure, and has a large diameter part 36 on the upstream side and a small diameter part 38 on the downstream side. The downstream end of the small diameter portion 36 and the upstream end of the small diameter portion 38 are connected by a connecting portion 40 extending in the radial direction. The large diameter portion 36, the small diameter portion 38, and the connecting portion 40 have an integral structure and are made of a refractory material to be described later.

The large diameter portion 36, the small diameter portion 38, and the connection portion 40 of the drainage connection member 64 each include an outer layer 64a and an inner layer 64b. The small diameter portion 38 of this drainage connection member 64 is inserted into the upstream end of the drainage pipe 54 disposed on the wall 52 of the building 6 described above.
The outer layer 64a and the inner layer 64b (that is, the parts other than the intermediate layer 42 described later) of the drainage connecting member 64 are made of a fire-resistant (non-combustible) polyvinyl chloride resin that does not contain thermally expandable graphite. .

The small diameter portion 38 of the drainage connection member 64 includes the above-mentioned outer layer 64a and inner layer 64b, and an intermediate layer 42 made of a fire-resistant thermally expandable resin composition is provided between the outer layer 64a and the inner layer 64b. It is provided. This intermediate layer 42 is sealed by an outer layer 64a and an inner layer 64b so as not to come into contact with outside air or cleaning water. This intermediate layer 42 is made of a fire-resistant thermally expandable resin composition, expands with heat, and closes the internal passage of the small diameter portion 38.

Here, the intermediate layer 42 made of a fire-resistant thermally expandable resin composition is provided over the entire area along the axis of the small diameter portion 38, but it may also be provided only in a part of the small diameter portion 38. good. Further, the intermediate layer 42 may be provided in a sealed manner between the outer layer 64a and the inner layer 64b of the small diameter portion 38 and the connecting portion 40. It may be provided in a sealed manner between all the outer layers 64a and inner layers 64b (that is, the entire area of the drain connection member 34).

Here, FIG. 10 is a sectional view showing a pipe connection member in another example of the embodiment shown in FIG. 9 described above. As shown in FIG. 10, the drain pipe 54 has an enlarged diameter only at its upstream end. In this case, since the small diameter portion 38 of the drainage connecting member 64 fits inside the upstream end of the expanded diameter of the drainage pipe 54, the internal diameter of the drainage connecting member 64 and the internal diameter downstream of the expanded upstream end of the drainage pipe 54 The surfaces are flush (the same) and there are no steps or the like. Thereby, it is possible to suppress the flow of drainage from being disturbed in the drainage pipe 54 in which the small diameter portion 38 of the drainage connection member 64 is provided, and it is possible to ensure drainage performance.
Further, the downstream end of the drain socket 60, the small diameter portion 38 of the drain connecting member 64, and the drain pipe 54 may be connected by adhesive, packing, or the like.

The fire-resistant thermally expandable resin composition of this intermediate portion 42 is the same as that described in the first embodiment.

Next, the drainage pipe 54 is a fire-resistant double-layered pipe, the outer peripheral part 54a is made of concrete, and the inner peripheral part 54b is made of fire-resistant (non-combustible) thermally expandable graphite-free polyvinyl chloride resin. It is made.

The drainage connection member 60 according to the second embodiment of the present invention described above also has the same effects as the drainage connection member 34 according to the first embodiment described above.

Next, a drainage connection member according to a modification of the second embodiment of the present invention will be described with reference to FIGS. 11 and 12. FIG. 11 is a sectional view showing a drainage connection member and a drainage socket according to a modification of the second embodiment of the present invention, and FIG. 12 is a sectional view showing the drainage connection member shown in FIG. 7.
The basic structure of the drainage connection member 66 according to this modification is the same as that of the drainage connection member 64 shown in FIGS. 8 and 9 described above, so the different parts will mainly be explained here.

First, as mentioned above, the drainage pipes installed in apartment complexes and detached houses have a plurality of different pipe diameters, and for example, the inner diameter of the drainage pipe of one detached house is larger than that of the other detached house. It may happen. This modification is intended to deal with the fact that the inner diameter of the drainage pipe 54 differs depending on the building.

For this reason, the drainage connection member 66 according to this modification includes an adjustment pipe (adapter) 68 in addition to the above-mentioned large diameter portion 36, small diameter portion 38, and connection portion 40. When the inner diameter of the drainage pipe 54 is large, a gap exists between the outer circumference of the small diameter part 38 and the inner circumference of the drainage pipe 54 on the building side into which the small diameter part 38 is inserted, so the adjustment pipe is inserted into this gap. 68 is embedded. Further, like the small diameter portion 38 described above, this adjustment tube 68 also includes an outer layer 68a, an inner layer 68b, and an intermediate layer 42 sealed between the outer layer 68a and the inner layer 68b. .

In the drainage connecting member 66 according to the present modification described above, the adjustment pipe 68 is inserted into the gap that exists between the outer circumferential side of the small diameter portion 38 and the inner circumferential side of the drainage pipe 54 on the building side into which the small diameter portion 38 is inserted. Since it is embedded, even if the inner diameter of the drainage pipe 54 on the building side differs, the same drainage connection member can be used. Furthermore, since the intermediate layer 42 has a double structure provided in both the small diameter portion 38 of the drainage connection member 66 and the adjustment pipe 46, the inside of the drainage connection member 66 can be more reliably closed. In addition, in this modification, the intermediate layer 42 is provided in both the drainage connection member 44 and the regulator 46 for the purpose of reliably blocking the drainage pipe 10 on the building side. An intermediate layer 42 may also be provided.

1,50 Flush toilet 2 Toilet main body 6 Building 8 Floors 10, 54 Drain piping 16 Bowl part 24 Drain trap pipe 24a Inlet 24b Ascending pipe 24c Descending pipe 30, 60 Drain socket 34, 44, 64, 66 Drain connection Members 34a, 44a, 64a, 66a Outer layer 34b, 44b, 64b, 66b Inner layer 36 Large diameter portion 38 Small diameter portion 40 Connection portion 42 Intermediate layer 46, 68 Adjustment tube

Claims (7)

A tubular drainage connection member connected between the downstream end of a drainage channel of a flush toilet and the upstream end of a drainage pipe on the side of a building in which the flush toilet is installed,
This drainage connection member is
an outer layer provided on the outside;
an inner layer provided on the inside;
an intermediate layer sealed between the outer layer and the inner layer;
A drainage connection member, wherein the intermediate layer is formed of a fire-resistant thermally expandable resin composition. The drainage connection member according to claim 1, wherein the drainage connection member includes a small diameter portion that is inserted into the drainage pipe on the building side, and a large diameter portion that is connected to the downstream end of the drainage channel of the flush toilet. . The drainage connection member according to claim 2, wherein the intermediate layer is provided at least in a part of the small diameter portion. The drainage connection member according to claim 2 or 3, further comprising a radially extending connection part connecting the small diameter part and the large diameter part, and this connection part is also provided with the intermediate layer. Drainage connection member. The drainage connection member according to any one of claims 2 to 4, wherein the intermediate layer of the drainage connection member is provided over the entire area along the axis of the small diameter portion. The drainage connection member according to any one of claims 1 to 5, wherein an intermediate layer is provided over the entire area of the drainage connection member. The adjustment pipe further includes an adjustment pipe embedded in a gap existing between the outer circumference of the small diameter portion of the drainage connecting member and the inner circumference of the drainage pipe of the building into which the small diameter portion is inserted. A drainage connection member according to any one of claims 2 to 4, comprising the intermediate layer sealed therein.

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