JP2020094481A - Drainage pipe joint - Google Patents

Abstract

To provide a drainage pipe joint capable of sufficiently exhibiting fire resistance, suppressing drainage noise, and suppressing increase in pipe outer diameter.SOLUTION: A drainage pipe joint 100 comprises a pipe body 110 formed of a plurality of resin injection-molded products and arranged in a through hole of a floor slab, an upper standing pipe connecting portion 120 that connects an upper floor side drainage standing pipe 220 that protrudes above the floor slab and flows in the drainage from the upper floor, a lower pipe connecting portion 130 that connects a lower floor side drainage pipe 230 that projects downward of the floor slab and allows drainage to flow to the lower floor, and a horizontal branch pipe connecting portion 140 for connecting the drain horizontal branch pipe above the floor slab. A swirl vane 114 protruding to an inner surface of the pipe body 110 is formed between a lateral branch pipe connecting portion 140 and the lower pipe connecting portion 130 in the pipe body 110. A hollow corresponding to the swirl vane 114 is formed on an outer surface of the pipe body 110, and a thermally expandable refractory material 116 is filled in the hollow portion.SELECTED DRAWING: Figure 1

Description

The present invention relates to a drainage pipe joint provided through a floor slab of a building, and in particular, by including a heat-expandable refractory material, it is possible to block the pipeline during a fire and block the flow of flame, smoke, etc. The present invention relates to a drainage pipe joint made of resin.

Water supply facilities and drainage facilities are installed in apartment houses and office buildings. Of these, the typical drainage system is a drainage pipe structure that includes vertical pipes that vertically penetrate each floor of the building, horizontal pipes installed in each floor, and drainage pipe joints that connect these pipes. Widely known.
And, such a drainage pipe joint, when installed in a building, a pipe main body arranged in the through hole of the floor slab, and a drainage standpipe protruding above the floor slab and flowing in the drainage from the upper floor. Upper pipe connection part to connect, lower pipe connection part that connects the drainage vertical pipe that projects below the floor slab and flows down the drainage to the lower floor, and horizontal branch pipe that connects the horizontal drainage pipe above the floor slab And a connection part. Further, many pipe bodies are provided with a portion (for example, a swirl vane, a drift plate, etc.) that changes the flow of drainage in the drainage pipe joint. Further, as such a drainage pipe joint, one formed of one or a plurality of resin injection molded products is widely known.

In a building equipped with a drainage pipe structure using such a drainage pipe joint, when a fire or the like occurs downstairs, flames, soot, and toxic gases are burned or melted in the drainage pipe structure to the upper floors. In order to prevent the outflow to the drainage pipe joint, a heat-expandable refractory material is separately provided on the outer periphery of the pipe material or embedded in the wall of the pipe material so that the through hole of the floor slab can be opened during a fire. A state in which the thermal expansion refractory material is blocked is maintained (Patent Document 1). This heat-expandable refractory material is, for example, a resin component containing butyl rubber as a main component, a phosphorus compound, a neutralized heat-expandable graphite, a resin composition containing a water-containing inorganic material and a metal carbonate, or an epoxy resin, It is formed from a resin composition containing a phosphorus compound, neutralized thermally expandable graphite and an inorganic filler.

Also, instead of separately providing a heat-expandable refractory material on the outer periphery of the piping material or burying it in the wall portion of the piping material, place it at a position corresponding to the floor slab that is part of the body part of the drainage piping joint A refractory expansion layer formed of a refractory and thermally expansive resin composition containing 1 to 15 parts by weight of thermally expansive graphite to 100 parts by weight of polyvinyl chloride resin, and inner and outer surfaces of the refractory expansion layer A heat-resistant heat-expandable resin pipe obtained by extrusion molding having a three-layer structure covered with a coating layer formed of a polyvinyl chloride-based resin composition containing no heat-expandable fire-resistant material. One joint component member 10) is also provided (Patent Document 2).

Both the drainage pipe joint disclosed in Patent Document 1 and the drainage pipe joint disclosed in Patent Document 2 have thermal expansion resistance to fire, so that when a fire occurs, thermally expansive graphite or the like that exhibits this thermal expansion resistance undergoes thermal expansion. By doing so, the drainage pipe joint and the through holes provided in the slab are closed to allow the floor slab to retain the function as a fireproof partition wall.

Japanese Patent No. 5859042 Japanese Patent No. 5508048

The drainage pipe joint disclosed in Patent Document 1 described above has good fire protection performance, but when a thermally expansive refractory material is wound around the outer layer of the drainage pipe joint, the outer diameter of the drainage pipe joint increases and the floor slab Therefore, when burying the heat-expandable refractory material in the wall of the piping material, place the heat-expandable fire-resistant material in the mold and then wrap it up. Since the inner and outer layers must be injection-molded to form an embedded three-layer structure, the manufacturing process becomes complicated and the manufacturing cost increases.

On the other hand, in the drainage pipe joint disclosed in Patent Document 2, it is necessary to separately form a refractory thermal expansion resin pipe, which increases the number of manufacturing steps and raises the manufacturing cost. In addition, 100 parts by weight of polyvinyl chloride resin is used. On the other hand, the content of the heat-expandable graphite is only 1 to 15 parts by weight, and the total amount of the heat-expandable graphite is not large in the first place, and the heat-expandable graphite is contained in the resin in such a ratio. Therefore, it is more difficult to close the penetration part of the floor slab than when the thermally expandable graphite itself is provided separately on the outer periphery of the piping material (as in Patent Document 1).

Further, from a viewpoint different from fire resistance, even if the drainage pipe joint disclosed in Patent Document 1 or the drainage pipe joint disclosed in Patent Document 2 is used, A portion for changing the flow of drainage (for example, a swirl vane, a drift plate, etc.) is provided, and the drainage hits this portion to change the flow (swirl flow, drift). As a matter of course, if the drainage hits this portion, the drainage pipe joint body may vibrate to generate drainage noise. Therefore, it is necessary to devise to effectively reduce such vibration.

The present invention has been developed in view of the above problems, and an object thereof is to penetrate through a floor slab of a building formed of one or more resin injection-molded products. It is an object of the present invention to provide a drainage pipe joint capable of sufficiently exhibiting fire resistance, suppressing drainage noise, and suppressing an increase in the pipe outer diameter.

In order to achieve the above object, the drainage pipe joint according to the present invention takes the following technical means.
That is, the drainage pipe joint according to the present invention is formed of one or more resin injection-molded products, and when installed in a building, a pipe body arranged in a through hole of the floor slab, and the floor slab. And a lower pipe connecting part that connects the drain standing pipe that projects above the floor and connects drainage from the upper floor, and a drain standing pipe that projects below the floor slab and flows down the drainage to the lower floor. And a horizontal branch pipe connecting portion for connecting a drain horizontal branch pipe above the floor slab, and the pipe main body is provided between the horizontal branch pipe connecting portion and the lower pipe connecting portion in the pipe main body. A protruding portion is formed on the inner surface of the tube, a recess corresponding to the protruding portion is formed on the outer surface of the tube body, and a thermally expandable refractory material is filled in the recessed portion.

Preferably, the recess may be configured such that, when applied to a building, at least a part thereof is formed at a position corresponding to at least a part of a range from an upper end to a lower end of the floor slab. ..
More preferably, the protrusion may be a portion that changes the flow of drainage in the drainage pipe joint.

More preferably, the protrusion may be a swirl vane.
More preferably, the recess may be formed on all or part of the back surface of the swirl vane.
More preferably, the outer layer of the heat-expandable refractory material may be provided with a member having fire resistance and vibration suppressing performance.

More preferably, the member has a three-layer structure, and a damping material, a vibration insulator formed of a refractory inorganic fiber, and a sound insulating cover are provided on the outer surface of the pipe body in this order from the outer surface of the pipe body. Can be configured to
More preferably, the damping material may be configured to be attached to an outer surface of the pipe body so as to cover the heat-expandable refractory material filled in the recessed portion.

More preferably, a heat-expandable refractory sheet may be attached to the outer surface of the pipe body in place of the damping material at a position above the recessed portion.
More preferably, the innermost layer in the three-layer structure is any one of the vibration damping material and the heat-expandable fireproof sheet, and the pipe diameter in which the innermost layer is provided is the upper opening of the pipe body. It may be configured such that the outer diameter is equal to or smaller than the outer diameter of the receiving port into which the lateral branch pipe connecting portion is inserted.

More preferably, the thermal expansion refractory material and the thermal expansion refractory sheet may be configured to have different thermal expansion coefficients.
More preferably, the damping material is formed of a butyl-based or asphalt-based material, and the sound insulation cover is formed of a rubber-based, elastomer-based or olefin-based material. You can

According to the present invention, it is a drainage pipe joint provided through a floor slab of a building formed of one or more resin injection-molded products, which sufficiently exhibits fire resistance performance and suppresses drainage noise. It is possible to provide a drainage pipe joint capable of suppressing an increase in the pipe outer diameter.

It is a figure which shows the drainage piping structure which adopted the drainage piping coupling 100 which concerns on this invention, Comprising: (A) The drainage piping coupling 100 is a perspective view which shows the state provided with the outer layer member 150, (B) Drainage piping FIG. 6 is a perspective view showing a state in which the joint 100 does not include the outer layer member 150. It is a figure showing drainage pipe joint 100 concerning the present invention, and is a perspective view showing the state where (A) thermal expansion refractory material 116 was filled up, and (B) thermal expansion refractory material 116 is filled up. It is a perspective view which shows the state which does not exist. FIG. 3(A) is an exploded view of the drainage pipe joint 100 shown in FIG. 2(B), and is a perspective view of the pipe body 110 as seen through the pipe wall (B). It is sectional drawing which shows the drainage piping structure which adopted the drainage piping joint 100 which concerns on this invention. It is sectional drawing which shows another example of the drainage piping structure which adopted the drainage piping joint 100 which concerns on this invention. It is a figure which shows the modification of the drainage pipe joint 100 which concerns on this invention. It is a figure for demonstrating the hollow in the drainage pipe joint 100 which concerns on this invention. It is a half cross-sectional view showing a drainage pipe structure in which another drainage pipe joint 500 according to the present invention is adopted. FIG. 9 is a partially enlarged cross-sectional view (no hollow cross section) of FIG. 8. FIG. 9 is a partially enlarged cross-sectional view (with a hollow cross section) of FIG. 8. FIG. 9A is a development view of rock wool, which is an example of a vibration insulator 720 (formed of a refractory inorganic fiber) forming the outer layer member 700 having the three-layer structure shown in FIG. 8, and FIG. is there.

Hereinafter, a drainage pipe joint 100 according to an embodiment of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1(A) and FIG. 4(A), a drainage piping structure using this drainage piping joint 100 has a non-fireproof resin provided in through holes vertically penetrating a floor slab S in a building. Drainage pipe joint 100 made of resin, and a drainage pipe made of resin connected to this drainage pipe joint 100 (upper side drainage pipe 220 into which the drainage from the upper floor flows and lower floor side through which the drainage flows down to the lower floor) Drainage pipe 230). Here, "non-fireproof" means the property of being able to be deformed, melted, or burned by the heat when a fire occurs in a building, and for example, the one made of resin is applicable.

The drainage pipe joint 100 and the drainage vertical pipes (upper floor side draining vertical pipe 220 and lower floor side draining vertical pipe 230) are formed of, for example, vinyl chloride, polyethylene, polybutene, polypropylene, nylon or the like. A so-called fire-resistant two-layer pipe may be used for the drainage vertical pipe.
As shown in FIG. 3(A), this drainage pipe joint 100 is formed of one or a plurality (here, six as an example) of resin injection molded products. And this drainage pipe joint 100, as shown in FIG. 1(A) and FIG. 4(A), when installed on a building, a pipe main body 110 arranged in a through hole of the floor slab S, and a floor. An upper standing pipe connecting portion 120 which projects above the slab S and connects an upper floor side drainage standing pipe 220 into which the drainage from the upper floor flows, and a lower floor drainage which projects below the floor slab S and causes the drainage to flow down to the lower floor. The lower pipe connecting part 130 connecting the standing pipe 230 and the horizontal branch pipe connecting part 140 connecting the drain horizontal branch pipe (not shown) above the floor slab S are provided. What is characteristic is that, as shown in FIGS. 3(A) and 3(B), between the lateral branch pipe connecting portion 140 and the lower pipe connecting portion 130 of the pipe body 110, A swirl vane 114 is formed as a projecting portion projecting to the inner surface, and a recess 112 corresponding to this projecting portion (here, swirl vane 114) is formed on the outer surface of the tube main body 110, and a thermal expansion property is formed in the recess 112. The refractory material 116 is filled.

Then, as shown in FIG. 4(A), the recess 112 of the projecting portion (swirl vane 114) has at least a part thereof in a range from the upper end to the lower end of the floor slab S when it is installed in a building. It is formed at a position corresponding to at least a part.
Here, the protruding portion is not limited to the swirl vane 114 as long as it is a portion that changes the flow of drainage in the drainage pipe joint 100, and may be a drift plate or the like. The swirl vane and the deflector plate are not limited as long as the depression 112 corresponding to the outer surface is formed.

Further, it is also preferable to provide an outer layer member 150 having fire resistance and vibration suppression performance on the outer layer of the heat-expandable refractory material 116 so as to be wound around the outer periphery of the pipe body 110. Examples of the outer layer member 150 include rock wool or glass wool.
The drainage pipe joint 100 having such characteristics will be described in more detail.
In addition to the configuration described above, the drainage pipe joint 100 has a lateral branch pipe connecting portion 140, as shown in FIG. 3(A), in a water collecting chamber having openings at three positions at 90° intervals in a plan view. 142, a first horizontal branch pipe connecting member 144 for connecting the drain horizontal branch pipe corresponding to the position of the opening, a second horizontal branch pipe connecting member 146, and a third horizontal branch pipe connection And a member 148. Here, although not limited, the first horizontal branch pipe connecting member 148 connects the drain horizontal branch pipe without reducing the diameter, but the second horizontal branch pipe connecting member 144 and the third horizontal branch pipe are connected. The pipe connection member 146 is reduced in diameter to connect the drain lateral branch pipe.

Further, the drainage pipe joint 100 is formed of the six resin injection-molded products shown in FIG. 3(A) as described above, and the injection-molded products of these separate injection-molded products shown in FIG. 3(A). The joints are bonded together with an adhesive or the like, assembled as shown in FIG. 2B, and as described above, the portion of the recess 112 is filled with the heat-expandable refractory material 116 to complete the process. The water collecting chamber 142 and the pipe body 110 may be integrally formed instead of being separate bodies.

Here, the thermally expansive refractory material 116 filled in the recess 112 will be described. The heat-expandable refractory material 116 is, for example, a resin composition containing butyl rubber as a main component, a phosphorus compound, neutralized heat-expandable graphite, a resin composition containing a water-containing inorganic material and a metal carbonate, or an epoxy resin. It is formed from a resin composition containing a phosphorus compound, neutralized thermally expandable graphite and an inorganic filler. As the heat-expandable refractory material 116, for example, a product name “Fiblock” manufactured by Sekisui Chemical Co., Ltd. (expanded 5 to 40 times at a reaction temperature of 200° C.) is used. In addition, in addition to Inaba Denki Sangyo Co., Ltd.'s product name "heat-expandable heat-resistant sealing material IP" (expansion starts at 120°C and expands to 4 times or more in volume), and Furukawa Techno Material Co., Ltd. "Heat Mel" (expansion start temperature 120° C., remarkable expansion temperature 260° C., expands 4 to 8 times) and the like can be used as the heat-expandable refractory material 116.

The heat-expandable refractory material 116 is not limited to the above, and various other materials can be used.
As described above, as the heat-expandable refractory material 116, a wide variety of materials having different reaction temperatures and expansion coefficients can be used. Therefore, various conditions such as reaction temperature and pipe diameter required depending on the construction site in the building can be used. You can select and use the most suitable one.

The heat-expandable refractory material 116 is formed in a putty shape so that the recess 112 on the outer surface of the pipe body 110 of the drainage pipe joint 100 is filled up to about the outer diameter of the pipe body 110 (the desired fire resistance is sufficient). The amount that can be achieved is filled. Therefore, the outer diameter of the pipe body 110 of the drainage pipe joint 100 is about the same as that of the conventional drainage pipe joint.
In this way, the heat-expandable refractory material 116, as shown in FIG.
14) is filled with the thermally expansive refractory material 116 itself (not resin-containing and pure) in the portion corresponding to the depression 112, and as shown in FIG. At least a part of the floor slab S is formed at a position corresponding to the range from the upper end to the lower end of the floor slab S when the work is applied to the object.

That is, at least a part of the heat-expandable refractory material 116 is interposed between the outer peripheral surface of the drainage pipe joint 100 and the mortar M filled in the through hole of the floor slab S, and further, the pipe body 110. It is filled in the recess 112 on the back surface (outer surface side) of the projecting portion (swirl vane 114) projecting to the inner surface of. Therefore, the thermally expansive refractory material 116 is provided so as to project further inward (via the swirl vanes 114) than the inner wall of the tube body 110. The pipe body 110 of the drainage pipe joint 100 is fixed to the through hole by being backfilled with the mortar M or the like while being inserted into the through hole of the floor slab S.

In a building adopting such a drainage pipe structure, when the drainage pipe joint 100 or the drainage pipe (upper floor side drainage pipe 220, lower floor side drainage pipe 230) burns, the drainage pipe joint is caused by the heat. The protrusion (swirl vane 114) expands inward in the radial direction of 100, and the protrusion (swirl vane 114) of the drainage pipe joint 100 is crushed to close the pipe body 110. As a result, the drainage pipe structure using this drainage pipe joint 100 can block the pipeline so that flames, smoke, and the like do not flow during a fire.

In particular, since the heat-expandable refractory material 116 before combustion is provided further inside than the inner wall of the pipe body, that is, the protrusion protruding further inward than the inner wall of the pipe body 110, compared to the conventional drainage pipe joint. In order to start expanding from the part (swirl vane 114), it can effectively expand into the inside of the tube body.
Further, in this drainage pipe joint 100, a recess 112 that appears on the outer surface of the pipe body 110 (corresponding to the protrusion (swirl vane 114)) for forming a protrusion (swirling vane 114) that protrudes inside the pipe body 110. Is filled with a thermally expansive refractory material 116. For this reason, compared to the case where the hollow 112 is hollow, the vibration of the pipe main body 110 when the projection (the swirl vane 114) is hit by the drainage can be reduced, so that the drainage noise can be reduced.

In particular, when an outer layer member 150 such as rock wool or glass wool having fire resistance and vibration suppressing performance is provided on the outer layer of the heat-expandable fireproof material 116, the vibration suppressing performance of the outer layer member 150 further reduces drainage noise. can do. In addition to this, due to the fire resistance of the outer layer member 150, in the region where the heat-expandable refractory material 116 is outside the pipe body 110 and the mortar M does not exist (region A shown in FIG. 4A), Since the expansive refractory material 116 can be restrained from unnecessarily expanding into the space outside the tube body 110, the thermally expansive refractory material 116 can be effectively expanded into the tube body 110.

As described above, according to the drainage pipe joint 100, the drainage pipe joint 100 is formed of one or a plurality of resin injection-molded products and is provided so as to penetrate the floor slab S of the building to sufficiently exhibit fire resistance performance and drainage noise. It is possible to suppress the increase in the outer diameter of the pipe. In particular, sufficient foamability is obtained because the embodiment in which the heat-expandable refractory material 116 itself is filled is used instead of the embodiment in which the heat-expandable graphite is contained at a ratio of 1 to 15 parts by weight with respect to 100 parts by weight of the polyvinyl chloride resin. In addition to being able to develop, it is only necessary to fill the portion of the hollow 112 on the outer surface of the pipe body 110 with the heat-expandable refractory material 116. In addition, the manufacturing cost does not increase, and the outer diameter of the drainage pipe joint is not increased by winding the thermally expansive refractory material itself around the outer layer of the drainage pipe joint.
<Three modified examples of drainage pipe structure>
In the following, three modified examples of the drainage pipe structure that employs the drainage pipe joint 100 according to the present embodiment will be described. Since the three modified examples are the same in that the drainage pipe joint 100 itself is adopted, the description of the drainage pipe joint 100 will not be repeated here.

As shown in FIG. 4B, in the first modification, when the drainage piping structure is constructed using the drainage piping joint 100 described above, the pipe body 110 of the drainage piping joint 100 is connected to the through hole of the floor slab S. When the through hole is backfilled with the mortar M or the like in the state where the mortar M is inserted, the holding member 300 having a substantially annular hole for preventing leakage to the lower floor of the mortar M is provided. The holding member 300 is fixed by an anchor bolt B and a nut N provided on the lower floor side of the floor slab S before the through hole is backfilled with the mortar M or the like (may be fixed by an adhesive tape or the like). .. Therefore, as shown in FIG. 4(B), even if the diameter of the pipe body 110 is reduced in the region of the through hole, the pipe body 110 is recessed in the outer surface of the pipe body 110 (unlike the conventional drainage pipe joint). Even if 112 is provided (the mortar M is unlikely to leak to the lower floor because it is buried to the outer diameter of the pipe body 110 by the thermally expansive refractory material 116 in the first place), the through hole is filled with the mortar M or the like. When returning it, leakage to the lower floor of the mortar M can be suitably prevented.

As shown in FIG. 4(C), the second modified example is similar to the first modified example in that in addition to preventing leakage to the lower floor of the mortar M, in order to hold the outer layer member 150, A holding member 400 is provided, which has a substantially L-shaped cross section and extends from the inner circumference of the annular shape. Like the holding member 300, the holding member 400 is also fixed with anchor bolts B and nuts N and the like provided on the lower floor side of the floor slab S before the through holes are backfilled with the mortar M and the like. Therefore, as shown in FIG. 4C, when the through hole is backfilled with the mortar M or the like, leakage to the lower floor of the mortar M can be appropriately prevented, and in addition, the outer layer member 150 is provided with the holding member. Since it can be held by the floor slab S via 400, the outer layer member 150 does not fall off in the event of a fire, so that the fire resistance performance of the outer layer member 150 can be reliably exhibited. A method of fixing the outer layer member 150 to the holding member 400 is not described because it is not particularly limited.

The third modification is a case where so-called floating piping is used, as shown in FIG. 5, in which the core of the horizontal drain branch pipe is, for example, 140 mm above the upper end of the slab S. In such a case, if the heat-expandable refractory material 116 comes out above the slab S, the fire resistance performance may not be exhibited and/or the fire resistance performance may be deteriorated. In addition, the fire on the lower floor will stop on the upper floor, which is not preferable. Therefore, as shown in FIG. 5, the drainage pipe structure according to the third modified example has a drainage horizontal branch pipe with a resin pipe (outer diameter 89 mm) having a nominal diameter of 75 connected to the horizontal branch pipe connection portion. A structure is provided such that the lower end of the portion filled with the heat-expandable refractory material 116 does not come above the position (upper surface of the slab S) 140 mm below the tube core. Needless to say, it is preferable that most of the portion filled with the thermally expansive refractory material 116 is disposed below the upper surface of the slab S.

Generally, the thickness of the slab S corresponding to the drainage pipe joint 100 according to the present embodiment is often 100 mm or more. Therefore, the upper end of the portion filled with the heat-expandable refractory material 116 is located above the position 100 mm below the lower end of the lateral branch pipe connection portion 140.
The outer layer member 150 above the lateral branch pipe connection portion 140 is mainly intended for sound insulation and heat insulation, and since it becomes an obstacle when backfilling the through hole with the mortar M or the like, the outer layer member 150 is filled with the mortar M. It is also preferable to set after returning. Therefore, in this case, when backfilling with the mortar M, the outer layer member 150 is only below the lateral branch pipe connection portion 140.

Here, there is a portion where the heat-expandable refractory material 116 is filled in the tapered portion of the lower pipe portion of the pipe main body 110 of the drainage pipe joint 100, but the presence of the outer layer member 150 further causes the filled thermal expansion. The refractory material 116 can be prevented from falling.
Furthermore, since the outer surface of the hollow 112 after being filled with the heat-expandable refractory material 116 is substantially the same as the outer surface of the pipe body 110 of the drainage pipe joint 100, the cross-sectional shape of the outer periphery becomes circular and the mortar M Can be suitably prevented from leaking to the lower floor during filling.

<Modified example of drainage pipe joint>
Hereinafter, a modification of the drainage pipe joint 100 according to the present embodiment will be described with reference to FIG. 6. The drainage pipe joint 100 according to this modified example is different from the above description only in that the portion where the heat-expandable refractory material 116 is provided is not only the recess 112, and the other portions are the same, so the detailed description thereof will be given here. Does not repeat.
As shown in FIG. 6, for example, the portion where the heat-expandable refractory material 116 is provided (set) (the portion of the drainage pipe joint 100) is located outside the pipe main body 110 of the drainage pipe joint 100 in addition to the recess 112. Can be considered. Here, by providing the heat-expandable refractory material 117 in a portion having a smaller diameter than the body portion, such as a tapered portion, outside the portion of the recess 112, it is prevented from becoming larger than the outer diameter D(1) of the pipe body 110. ing.

<Modifications for depressions>
As described above, the recess 112 corresponding to the swirl vane 114, which is an example of the projecting portion, is formed on the outer surface of the pipe body 110 of the drainage pipe joint 100 according to the present embodiment, and the thermal expansion property is formed in the recess 112. The refractory material 116 is filled. Hereinafter, a modified example of the recess different from the recess 112 described above will be described with reference to FIG. 7. 7(A) is a top view of the pipe body 110 of the drainage pipe joint 100 described above, and FIGS. 7(B) and 7(C) are horizontal cross-sections around the center of the height range of the tapered portion. FIG. 7C and FIG. 7D are horizontal cross-sectional views for explaining a recess (modification) different from the recess shown in FIG. 7B.

In the case shown in FIG. 7B, which is the above-described embodiment described with reference to FIGS. 1 to 3, when the recess 112 is deep and the entire rear side of the swirl vane 114, that is, the horizontal cross section, FIG. In (A), the recess 112 is provided by using the entire portion which cannot be seen from the upper surface. In this case, the cross-sectional area through which the drainage passes becomes small, and the drainage performance may be reduced. In order to prevent this, the recess 112 may be provided shallowly. That is, as shown in FIG. 7(C), the recess 112 is provided only on a part of the back side of the swirl vane 114 (a portion that cannot be seen from the upper surface). As shown in FIG. 7(D), in FIG. 7(C), as compared with FIG. 7(B), no recess is provided in the broken line portion even on the back side of the swirl vane 114. That is, the recess 112 may be provided on the entire back surface of the swirl vane 114 or may be provided on a part of the back surface of the swirl vane 114.
In such a case, in response to the decrease in the amount of the heat-expandable refractory material 116 that can be filled, as shown in FIG. 6, in addition to the recess 112, the pipe main body 110 of the drainage pipe joint 100 is provided. It is also preferable to provide (set) the heat-expandable refractory material 116 on the outside of the.

<Another embodiment of drainage pipe structure>
In the following, a drainage pipe joint 500 according to another embodiment of the present invention and a drainage pipe structure using the drainage pipe joint 500 will be described in detail with reference to FIGS. 8 to 11. The drainage pipe structure using the drainage pipe joint 500 is provided in a through hole that vertically penetrates the floor slab S in the building, similarly to the drainage pipe structure using the drainage pipe joint 100 described above. Here, in the drainage pipe joint 500 described below and the drainage pipe structure using the drainage pipe joint 500, the same structure as the drainage pipe joint 100 described above and the drainage pipe structure using the drainage pipe joint 100 has been described above. The same reference numerals as in the embodiment are attached. Since the description about them overlaps with the above description, it may not be repeatedly described below.

8 is a half cross-sectional view showing a drainage pipe structure in which this drainage pipe joint 500 is adopted, FIG. 9 is a partially enlarged cross-sectional view (without a cross section of a recess 512 portion), and FIG. The drainage pipe joint 500 and the drainage pipe structure using the drainage pipe joint 500 will be described with reference to FIG. 10, which is a partially enlarged cross-sectional view (the cross-section of the recess 512 is present).
The drainage pipe joint 500 and the drainage vertical pipes (upper floor side drainage vertical pipe 220 and lower floor side drainage vertical pipe 230) are formed of, for example, vinyl chloride, polyethylene, polybutene, polypropylene or nylon.

As shown in these figures, the drainage pipe joint 500 is formed of a plurality of resin injection molded products. Then, as shown in these drawings, the drainage pipe joint 500 has a pipe main body 510 arranged in a through hole of the floor slab S and a pipe main body 510 that is projected above the floor slab S when installed on a building. Upright pipe connecting portion 520 for connecting the upper floor side drainage vertical pipe 220 into which the drainage flows from and from the lower floor side drainage vertical pipe 230 protruding below the floor slab S and flowing down the drainage to the lower floor. The pipe connection part 530 and the horizontal branch pipe connection part 540 which connects the drainage horizontal branch pipe 210 above the floor slab S are provided. As shown in these drawings, the horizontal branch pipe connection portion 540 includes a water collecting chamber 542 having openings at three positions at 90° intervals in plan view, and a drain horizontal branch pipe corresponding to the positions of the openings. And a second horizontal branch pipe connecting member 546 and a third horizontal branch pipe connecting member 548. Here, although not limited, the first lateral branch pipe connecting member 544, the second lateral branch pipe connecting member 546, and the third lateral branch pipe connecting member 548 are all drained without reducing the diameter. The lateral branch pipe 210 is connected.

A characteristic is that a swirl vane 514 is formed between the lateral branch pipe connecting portion 540 and the lower pipe connecting portion 530 in the pipe body 510 as a protruding portion protruding to the inner surface of the pipe body 510. The outer surface of the main body 510 is formed with a recess 512 corresponding to the protrusion (here, the swirl vane 514), and the thermal expansion refractory material 612 is filled in the recess 512. The heat-expandable fireproof material 612 corresponds to the heat-expandable fireproof material 116 described above. Here, as the heat-expandable refractory material 612, a non-hardening, non-drying putty-like material is preferably used.

Here, the protruding portion is not limited to the swirl vane 514 as long as it is a portion that changes the flow of drainage in the drainage pipe joint 500, and may be a drift plate or the like. It is not limited to the swirl vane or the deflector plate as long as the depression 512 corresponding to the outer surface is formed.
Furthermore, an outer layer member 700 having a three-layer structure having fire resistance and vibration suppressing performance is provided on the outer layer of the heat-expandable refractory material 612 so as to be wound around the outer periphery of the pipe body 510.

As shown in these drawings, the outer layer member 700 has a three-layer structure, and in order from the outer surface of the pipe body 510, a damping material 714, a vibration insulator 720 formed of a refractory inorganic fiber, and a sound insulating cover 730 in that order. , Provided on the outer surface of the pipe body 510. A thermal expansion refractory material 612 is filled in a portion of the dent 512, and the hollow portion dent 512 is filled with a putty-shaped thermal expansion refractory material 612 while exhibiting fire resistance performance (fire spread prevention function). By virtue of this, vibration damping performance and sound insulation performance are also exhibited.

The damping material 714 is attached to the outer surface of the pipe body 510 (for example, with an adhesive or a pressure-sensitive adhesive) so as to cover the heat-expandable refractory material 612 filled in the recess 512. ing. Regarding fire resistance, a heat-expandable fire resistant sheet 712 is attached to the outer surface of the pipe body 510 in place of the damping material 714 at a position above the recess 512. In this way, the heat-expandable refractory sheet 712 attached to the outer surface of the pipe body 510 also exhibits the vibration damping performance (although the performance may not be the same) like the vibration damping material 714.

In particular, the coefficient of thermal expansion differs between the thermal expansion refractory material 612 and the thermal expansion refractory sheet 712. Here, it is generally said that a heat-expandable refractory material has low shape retention after expansion when the coefficient of thermal expansion is high, and high shape retention after expansion when the coefficient of thermal expansion is low. If the coefficient of thermal expansion is low, sufficient fire resistance may not be exhibited, and if the shape retention is low, the thermal expansion material may fall. Considering the characteristics of this trade-off and the coefficient of thermal expansion (and the absolute value of the difference, etc.), the coefficient of thermal expansion can be adjusted according to each position, weight, shape, reaction rate, expansion start temperature, etc. The thermally expansive material contained in the refractory material 612 and the thermally expansive refractory sheet 712 is selected.

Further, the innermost layer 710 in this three-layer structure is either the heat-expandable fireproof sheet 712 or the damping material 714, and the pipe diameter D(3) provided with the innermost layer 710 (of the heat-expandable fireproof sheet 712). Portion) and the pipe diameter D(4) (portion of the damping material 714) are the upper openings in the pipe body 510 and the lateral branch pipe connection portion 540 (more specifically, the water collection chamber 542) is inserted. It is less than or equal to the outer diameter D(2) of the receiving port. As a result, it is possible to prevent the outer diameter of the drainage pipe joint 500 from increasing.

The vibration damping material 714 is formed by including a butyl-based (butyl rubber or the like) or asphalt-based (rubber asphalt, modified asphalt or the like) material, and the sound insulation cover 730 is a rubber-based (EPDM (ethylene propylene diene rubber) or the like), The vibration insulator 720, which is formed by including an elastomer-based or olefin-based (polyethylene resin or the like) material, and is formed of the refractory inorganic fiber, is made of an aggregate (porous material) of the fire-resistant inorganic fiber.

Here, examples of the inorganic fibers include artificial mineral fibers such as glass wool, rock wool, and ceramic fibers, which are preferable in terms of high vibration insulation performance and high sound absorption performance. The waste water flowing down the pipe body 510 is, for example, the swirl vanes 5.
The vibration generated by hitting 14 is suppressed by the damping material 714, and further, the vibration is blocked by the vibration insulator 720 formed of this rock wool or the like (and/or the noise accompanying the vibration is absorbed). Further, the sound insulation cover 730 formed of a rubber cover made of EPDM or the like blocks the propagation of noise accompanying vibration. Here, rockwool is a generic term for those manufactured mainly from steel slag such as natural rocks or blast furnace slag, and also has fire resistance and flame barrier properties.

It should be noted that in the following, a case where butyl rubber is adopted as the vibration damping material 714, rock wool is adopted as the vibration insulator 720, and a rubber cover made of EPDM is adopted as the sound insulation cover 730 may be described. The material is just an example.
When this rock wool is used as the vibration insulator 720, it is preferable to use a sheet-shaped rock wool manufactured by papermaking. However, the rock wool sheet manufactured by papermaking as described above is difficult to form into a three-dimensional shape (straight pipe portion+reduced diameter portion (tapered portion)) of the pipe main body 510 by sewing, and is sewn. Without a plane-shaped rock wool sheet (which may be simply referred to as rock wool in the following, but the shape of the vibration insulator 720 in the present invention is preferably a sheet shape), for example, with tape. Even if the pipe main body 510 is set by the above method, the pipe main body may be dropped at the time of fire. Therefore, the developed shape (planar shape) of the rock wool sheet is set as shown in FIG. 11(A), for example.

By doing so, even if the slab is thin, it is possible to make the break appear only at one position in the vertical direction (vertical direction in the tube body 510). Further, the development of the rock wool sheet shown in FIG. 11(B) is the same in that the cuts appear only at one position in the vertical direction, but the three-dimensional shape of the pipe body 510 (straight pipe portion+ In order to correspond to the reduced diameter portion (tapered portion), FIG. 11(A) has notches (here, 5) at the slab position in the rock wool sheet, while FIG. 11(B) is rectangular. And a partial ring shape are joined by an arc. In the case of the development view shown in FIG. 11A, the slab is located even if there is a nick in this part (this part may be mechanically weak or inferior in fire resistance) because it is the slab position. Since the slab is in a position and the slab does not burn, there is no problem with the fire resistance of rock wool, and it does not fall during a fire. On the other hand, in the unfolded view of the rock wool sheet shown in FIG. 11B, the length of the joint portion is not limited to the case where the joint portion indicated by the dotted line is not in the slab position, and of course, the length of the joint portion Is short and the weight of the partial annular shape joined to the lower side is large, and there is a possibility that the rock wool sheet may drop from the position of the joined portion and fall during a fire.

Further, the vibration insulator 720 in which the rock wool is adopted is loose over the entire circumference in order to suppress noise propagation due to resonance with the damping material 714 or the heat-expandable fireproof sheet 712 on the inner layer side. It is provided so that it is fixed at several points in the circumferential direction, instead of being fixed at the same position. In particular, when the rock wool is fixed (more specifically, the rock wool is fixed to a rubber cover made of EPDM as the sound insulation cover 730), the thermal expansion material (height expansion member) is set at several height positions in the circumferential direction. It is above the heat-expandable refractory material 612 and the heat-expandable fire-resistant sheet 712) and prevents the rock wool from dropping when a fire occurs. Further, as an example of a mounting method for preventing the drop, joining with an adhesive, a double-sided tape or the like can be mentioned.

Hereinafter, a method of manufacturing the drainage pipe joint 500 including the outer layer member 700 having the three-layer structure, and a procedure for attaching the outer layer member 700 will be described.
First, the depression 512 is filled with a putty-like heat-expandable refractory material 612. Then, the thermal expansion refractory sheet 712 is attached. In the present embodiment, the heat-expandable fire-resistant sheet 712 is separated from the putty-like heat-expandable fire-resistant material 612, but it covers all or part of the putty-like heat-expandable fire-resistant material 612. I don't care. Further, the damping material 714 is attached to the outer peripheral surface of the pipe body 510 with an adhesive or a pressure sensitive adhesive. At this time, the innermost layer 710 in this three-layer structure has either the heat-expandable fireproof sheet 712 or the vibration damping material 714.

A rockwool sheet (developed view is shown in FIG. 11A) as a vibration insulator 720 is wound on the heat-expandable fireproof sheet 712 and the vibration damping material 714. Further, a rubber cover made of EPDM as the sound insulation cover 730 is covered from above. Here, the rubber cover made of EPDM as the sound insulation cover 730 exhibits water blocking performance, sound insulation, and vibration insulation. The rubber cover made of EPDM as the sound insulation cover 730 may be integrally molded and adhered to the drainage pipe joint 500 so as to exhibit water blocking property, or may not be adhered (due to the elasticity of rubber). The water stopping property may be expressed only by the tension. In this case, as shown in the cross-sectional shapes shown in FIGS. 8 to 10, the upper end of the rubber cover made of EPDM as the sound insulating cover 730 has an annular upper end 732 and a thick upper end 732. It is also preferable to provide a lower end portion 734 having an annular shape and a large thickness at the end portion (although the diameters are different) to enhance the water blocking performance.

As described above, according to the drainage pipe joint 500, the drainage pipe joint 500 is formed of one or a plurality of resin injection-molded products and is provided so as to penetrate the floor slab S of the building to sufficiently exhibit fire resistance performance and drainage noise. Can be suppressed. In particular, in the outer layer member 700 having a three-layer structure, a damping material 714 such as butyl rubber is provided as the innermost layer 710 in close contact with the outer surface of the pipe body 510 to extremely effectively suppress vibration, and to serve as an intermediate layer. A vibration insulator 720, which is a rock wool sheet as an example, is loosely and fixed at several places to provide sound absorption, fire resistance, sound insulation, and vibration insulation, and an EPDM rubber cover is used as the outermost layer. The vibration damping member 714 suppresses the vibration generated when the drainage flowing down the pipe main body 510 hits the swirl vane 514, for example, by providing the sound insulating cover 730 to realize the water blocking property, the sound insulating property, and the vibration insulating property. Since the vibration insulator 720 further blocks the vibration, and the sound insulation cover 730 blocks the generation of noise due to the vibration, drainage noise can be suppressed extremely effectively. In addition, two heat-expandable refractory materials (a heat-expandable fire-resistant material 612 and a heat-expandable fire-resistant sheet 712) are provided, and the outside thereof is covered with a plurality of layers including a layer exhibiting fire resistance performance. Therefore, the fire resistance can be sufficiently exhibited.

It should be understood that the embodiments disclosed this time are exemplifications in all points and not restrictive. The scope of the present invention is shown not by the above description but by the claims, and is intended to include meanings equivalent to the claims and all modifications within the scope.

The present invention is preferable for a drainage pipe joint provided through a floor slab of a building, sufficiently exhibits fire resistance performance by blocking the pipeline during a fire, suppresses drainage noise, and has a large pipe outer diameter. It is particularly preferable in that it can be suppressed.

100, 500 Drainage pipe joint 110, 510 Pipe body 112, 512 Cavity 114, 514 Swivel blade 116, 612 Thermally expandable refractory material 120, 520 Upper pipe connection part 130, 530 Lower pipe connection part 140, 540 Horizontal branch pipe Connection part 142, 542 Water collection chamber 144, 146, 148 Horizontal branch pipe connection member 544, 546, 548 Horizontal branch pipe connection member 150, 700 Outer layer member 220 Upper floor drainage pipe 230 Lower floor drainage pipe 300, 400 Holding member 710 Innermost layer 712 Thermally expandable fireproof sheet 714 Damping material 720 Vibration insulator (formed by fireproof inorganic fiber) 730 Sound insulation cover

Claims (12)

Made of one or more resin injection molded parts,
When constructed on a building, a pipe main body arranged in the through hole of the floor slab, and an upper pipe connecting portion that connects the drain standing pipe that projects above the floor slab and allows the drainage from the upper floor to flow in, The lower slab is provided with a lower pipe connecting portion that connects a drainage vertical pipe that protrudes downward of the floor slab and that allows drainage to flow to the lower floor, and a horizontal branch pipe connecting portion that connects the drainage horizontal branch pipe above the floor slab,
Between the horizontal branch pipe connecting portion and the lower pipe connecting portion in the pipe body, a protrusion portion that protrudes to the inner surface of the pipe body is formed,
A recess corresponding to the protrusion is formed on the outer surface of the pipe body,
A drainage pipe joint, wherein the hollow portion is filled with a heat-expandable refractory material. The drainage pipe joint according to claim 1, wherein at least a part of the recess is formed at a position corresponding to at least a part of a range from an upper end to a lower end of the floor slab when the recess is applied to a building. .. The drainage pipe joint according to claim 1 or 2, wherein the projecting portion is a portion that changes a flow of drainage in the drainage pipe joint. The drainage pipe joint according to any one of claims 1 to 3, wherein the protruding portion is a swirl vane. The drainage pipe joint according to claim 4, wherein the recess is formed on all or a part of the back surface of the swirl vane. The drainage pipe joint according to any one of claims 1 to 5, wherein a member having fire resistance and vibration suppressing performance is provided on the outer layer of the heat-expandable refractory material. The member has a three-layer structure, and is provided on the outer surface of the pipe main body in this order from the outer surface of the pipe main body, a damping material, a vibration insulator formed of a refractory inorganic fiber, and a sound insulating cover. The drainage pipe joint according to claim 6. The drainage pipe according to claim 7, wherein the damping material is attached to an outer surface of the pipe body so as to cover the heat-expandable refractory material filled in the recessed portion. Fittings. The drainage pipe joint according to claim 8, wherein a heat-expandable fire-resistant sheet is attached to the outer surface of the pipe body in place of the damping material at a position above the recessed portion. .. The innermost layer in the three-layer structure is any one of the damping material and the heat-expandable fireproof sheet,
10. The drainage according to claim 9, wherein the diameter of the pipe provided with the innermost layer is equal to or smaller than the outer diameter of the upper opening of the pipe main body and the receiving port into which the lateral branch pipe connecting portion is inserted. Plumbing fitting. The drainage pipe joint according to claim 9 or 10, wherein the thermal expansion refractory material and the thermal expansion refractory sheet have different coefficients of thermal expansion. 8. The damping material is formed by including a butyl-based or asphalt-based material, and the sound insulation cover is formed by including a rubber-based, elastomer-based or olefin-based material. ~ The drainage pipe joint according to claim 11.

Images