JP7413132B2 - drainage pipe fittings - Google Patents

Description

The present invention relates to a drainage pipe joint that is installed through a floor slab of a building, and particularly to a drainage pipe joint that can exhibit an optimal fire spread prevention effect.

Water supply equipment and drainage equipment are installed in apartment complexes, office buildings, etc. The typical drainage system among these is a drainage piping structure that includes vertical pipes that pass vertically through each floor of a building, horizontal pipes that are installed within each floor, and drainage pipe joints that connect these pipes. widely known.
When installed in a building, such a drainage pipe joint consists of a pipe body that is placed in a through hole in a floor slab, and a drainage standpipe that protrudes above the floor slab and allows drainage from the upper floors to flow in. A standpipe connection section that connects, a downstand pipe connection section that connects a drainage standpipe that protrudes below the floor slab and allows drainage to flow down to the lower floor, and a horizontal branch pipe that connects a drainage horizontal branch pipe above the floor slab. A connection part is provided. Furthermore, many pipe bodies are equipped with parts (for example, swirl vanes, deflection plates, etc.) that change the flow of drainage within the drainage pipe joint. Moreover, as such a drainage pipe joint, one formed of one or more resin injection molded products is widely known.

In a building equipped with a drainage piping structure using such drainage piping joints, if a fire, etc. occurs downstairs, flames, soot, and toxic gases will be transmitted to the upper floors through the burned or eroded parts of the drainage piping structure. In order to prevent water from flowing into the drain pipe, thermally expandable fireproofing material is installed separately around the outer periphery of the pipe material or buried within the wall of the pipe material, and in the event of a fire, the through holes in the floor slab are closed. The closed state is maintained using this thermally expandable refractory material.

As such a technique, Japanese Patent No. 6576711 (Patent Document 1) discloses a drain pipe joint that is piped through a floor slab of a building, and includes a joint body to which the drain pipe is connected, and a joint body of the joint body. a first covering material covering the outer surface of the portion penetrating the floor slab, the joint body being made of thermoplastic resin, and the first covering material being arranged in this order from the inside. A first sound-absorbing layer made of a sponge material, a second sound-absorbing layer made of an aggregate of inorganic fibers, a waterproof and sound-insulating skin layer, and between the first sound-absorbing layer and the second sound-absorbing layer. A drain pipe joint is disclosed, which integrally includes a thermal expansion material sandwiched therebetween and provided in at least one ring shape around the joint body.

Patent No. 6576711

In the drainage joint disclosed in Patent Document 1 mentioned above,
The outer surface of the part of the joint body that penetrates the floor slab is covered with the first covering material, and the outer surface of the part that protrudes from the top surface of the floor slab is covered with the second covering material (1) The structure of the first covering material is inside. First sound absorbing layer made of sponge material (urethane foam)
・Second sound absorbing layer (glass wool) consisting of an aggregate of thermally expandable material and inorganic fibers sandwiched between the first sound absorbing layer and the second sound absorbing layer
・Waterproof and sound insulating skin layer (aluminum glass cloth)
(2) The structure of the second covering material is from the inside: Upper sound absorbing layer made of sound absorbing material (felt)
・Top sound insulation layer made of sound insulation material (butyl rubber)
The structure is disclosed.

However, in the structure disclosed in Patent Document 1, the prior art document states that the thermal expansion material is provided in a ring shape around the large diameter straight pipe part of the joint body, and that the thermal expansion material is provided in the first sound absorbing layer. The disclosure only discloses that the thermal expansion material contained in the first covering material is sandwiched between a second sound absorbing layer and a second sound absorbing layer, and that the thermal expansion material contained in the first covering material is backfilled with mortar. It cannot be said that it can be effective.

The present invention was developed in view of the above-mentioned problems, and its purpose is to provide a drainage pipe joint that is installed through the floor slab of a building, and that exhibits an optimal fire spread prevention effect. It is an object of the present invention to provide a drainage piping joint that can be used.

In order to achieve the above object, the drainage pipe joint according to the present invention takes the following technical measures.
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, the pipe body is arranged in a through hole of a floor slab, and the floor slab an upper pipe connection part that connects a drainage standpipe that projects upward and allows drainage from the upper floor to flow in; a drainage pipe connection part that connects a drainage pipe that projects below the floor slab and allows drainage to flow out to the lower floor; A drainage pipe joint comprising a horizontal branch pipe connecting portion for connecting a horizontal drainage pipe above the floor slab, characterized in that two types of thermally expandable fireproof materials having different coefficients of thermal expansion are provided. do.

Preferably, the two types of thermally expandable refractory materials are provided at different positions in the radial direction of the drain pipe joint, and the thermally expandable refractory material provided on the inner layer side is higher than the thermally expandable refractory material provided on the outer layer side. The structure can be such that the coefficient of thermal expansion is high.
More preferably, the two types of thermally expandable fireproofing materials are provided at different positions in the vertical direction of the drain pipe joint, and the thermally expandable fireproofing material is provided on the upper side and the thermally expandable fireproofing material is provided on the lower side. The thermal expansion coefficients can be configured to be different.

More preferably, the tube body includes at least a straight tube section and a reduced diameter section below the straight tube section, and in a height range of the straight tube section, two types of thermally expandable materials are arranged at different positions in the radial direction. It can be constructed such that a fireproof material is provided.
More preferably, the tube body includes at least a straight tube section and a reduced diameter section below the straight tube section, and the straight tube section and the reduced diameter section have two types of thermal expansion coefficients having different coefficients of thermal expansion. The structure can be such that each material is provided with a resistant refractory material.

More preferably, the two types of thermally expandable refractory materials may be configured to have portions that overlap with each other.
More preferably, at least one of the two types of thermally expandable fireproof materials may be provided at a position corresponding to the floor slab.
More preferably, the thermally expandable fireproofing material is in the form of a sheet and provided in an annular shape around a straight pipe portion provided in the drainage pipe joint, or in the form of a putty and provided in a depression provided in the drainage pipe joint. It can be configured to be provided in any of the following filling forms.

More preferably, the sheet-like thermally expandable refractory material provided in the annular form and the putty-like thermally expandable refractory material provided in the filled form exhibit vibration damping properties. be able to.

According to the present invention, it is possible to provide a drainage pipe joint that is installed to penetrate a floor slab of a building and that can exhibit an optimal fire spread prevention effect.

It is (A) a top view and (B) a side view showing a drainage piping structure in which a drainage piping joint 100 according to a first embodiment of the present invention is adopted. 2 is a diagram showing the drainage piping structure of FIG. 1, (A) a perspective view showing a state after the outer layer member 700 is provided on the drainage piping joint 100, and (B) an outer layer member 700 on the drainage piping joint 100. FIG. FIG. It is a perspective view showing the drainage pipe joint 100 after (A) a thermally expandable fireproof material 612 and a thermally expandable fireproof sheet 712 are provided, and (B) a perspective view showing a state after the thermally expandable fireproof material 612 and a thermally expandable fireproof sheet 712 are provided. 612 and a perspective view showing the state before the thermally expandable fireproof sheet 712 is provided. (A) is an exploded view of the drainage pipe joint 100 shown in FIG. 3(B), and (B) is a perspective view of the pipe body 110 seen through the pipe wall. 2 is a sectional view taken along line 5-5 in FIG. 1, showing a drainage piping structure in which a drainage piping joint 100 is adopted. FIG. 6 is a partially enlarged cross-sectional view of FIG. 5 (without a recess section). FIG. 6 is a partially enlarged cross-sectional view of FIG. 5 (with a recessed cross section). (A) A developed view of rock wool, which is an example of the vibration insulator 720 (formed from fire-resistant inorganic fiber) forming the outer layer member 700 with the three-layer structure shown in FIG. 5, and (B) a comparative example thereof. 7 is a developed view of rock wool, which is an example of a vibration insulator 726. FIG. They are (A) a top view and (B) a side view showing a drainage piping structure in which a drainage piping joint 200 according to a second embodiment of the present invention is adopted. FIG. 9 is a perspective view showing the drainage piping structure of FIG. 9, in which (A) the outer layer member 800 is provided on the drainage piping joint 200, and (B) the outer layer member 800 is provided on the drainage piping joint 200; FIG. It is a perspective view showing the drainage pipe joint 200 after (A) a thermally expandable fireproof material 612 and a thermally expandable fireproof sheet 712 are provided, and (B) a perspective view showing a state after the thermally expandable fireproof material 612 and a thermally expandable fireproof sheet 712 are provided. 612 and a perspective view showing the state before the thermally expandable fireproof sheet 712 is provided. (A) is an exploded view of the drain pipe joint 200 shown in FIG. FIG. 2 is a cross-sectional view of a tube body 210 for explanation. FIG. 2 is a sectional view taken along line 13-13 in FIG. 1, showing a drainage piping structure in which a drainage piping joint 200 is adopted. 14 is a partially enlarged sectional view of FIG. 13. FIG. (A) to (E) are diagrams for explaining the arrangement of thermally expandable fireproof materials.

In the following, a drainage pipe joint 100 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 8, and a drainage pipe joint 200 according to a second embodiment of the present invention will be described in FIGS. 9 to 15. Please refer to the following for a detailed explanation including the construction method. Here, the perspective views shown in FIGS. 2 to 4 and FIGS. 10 to 12 are shown schematically, and consistency with other figures (for example, FIGS. 5 and 13) may not be completely consistent. (For example, if there is a drain pipe connected to the drain pipe joint 100 or the drain pipe joint 200, or whether there is a drain pipe connected to the drain pipe joint 100 or the drain pipe joint 200, or if it is installed outside the socket of the standpipe joint 120 and the socket of the side branch pipe joint 140. presence or absence of vibration damping material 714, shape of swirl vane 114). Furthermore, in the following description, the terms "outer circumferential surface," "outer surface," and "outer side," "outer layer side," "outer circumferential side," and "outer side," and "inner layer side," "inner circumferential side," and "inner side" may not be clearly distinguished from each other.

<Summary>
As shown in FIGS. 1 and 5, as well as FIGS. 9 and 13, the drainage piping structure using the drainage piping joint 100 or the drainage piping joint 200 according to the embodiment of the present invention has a structure in which a floor slab S in a building is A drainage pipe joint 100 or a drainage pipe joint 200 provided in a penetrating through hole, and a drainage pipe joint 100 or a drainage pipe joint 200 provided above the floor slab S on the upper floor side that are connected to these drainage pipe joints 100 or 200 and allow drainage from the upper floor to flow in. A drainage standpipe 520, drainage horizontal branch pipes 510 (in this case, three pipes each) connected to these drainage pipe joints 100 or 200 above the floor slab S, It has a drain standpipe 530 or a 90-degree vent pipe 540 on the lower floor side that is connected to the drain pipe joint 100 or the drain pipe joint 200 and drains the waste water to the lower floor. The difference is that the drainage piping structure using the drainage piping joint 100 is adopted on floors other than the lowest floor, and the drainage piping structure using the drainage piping joint 200 is employed on the lowest floor. The drainage piping structure has the same structure. Note that these drainage piping structures are merely examples, and the drainage piping joint according to the present invention is not limited to the illustrated drainage piping structures.

Here, the drainage piping joint 100 or the drainage piping joint 200 employed in these drainage piping structures and the drainage pipes connected to these drainage piping joints are made of non-fireproof resin. However, the drainage pipe joint according to the present invention may be limited to such non-refractory resin materials, or may not be limited to resin materials, but may include materials other than resin materials such as cast iron. Therefore, in the following description, the drainage pipe joint 100, the drainage pipe joint 200, and the drain pipes connected to these drainage pipe joints will be explained as being made of non-fireproof resin, and cases where they are not limited to being made of resin will be described. , will be described as needed in the explanation. Here, "non-fireproof" refers to the property of being deformed, melted, or combustible by the heat generated when a fire occurs in a building, and includes, for example, those made of resin. In addition, when resin is used, for example, vinyl chloride, polyethylene, polybutene, polypropylene, or nylon, the drainage pipe joint 100, the drainage pipe joint 200, the pipes connected to these (the horizontal drainage pipe 510, the upper floor side The drainage standpipe 520, the lower floor drainage standpipe 530, and the 90-degree vent pipe 540) are molded. Note that, for example, a so-called fireproof two-layer pipe may be used as the drainage standpipe.

As shown in FIGS. 4(A) and 5, the drain pipe joint 100 has one or more (seven in this example) It is made of resin injection molded product. As shown in FIGS. 1, 4(A), and 5, when the drainage pipe joint 100 is installed in a building, the pipe body 110 is arranged in a through hole of a floor slab S, and the floor A standpipe connecting part 120 connects a drainage standpipe 520 that protrudes above the slab S and allows drainage from the upper floor to flow in, and a drainage pipe that projects below the floor slab S and connects the drainage standpipe 520 that flows out the drainage to the lower floor (here, the drainage A drain pipe connection part 130 connects the standpipe 530), and a horizontal branch pipe connection part 140 connects the drainage horizontal branch pipe 510 above the floor slab S. In addition, as shown in FIGS. 9, 12(A), and 13, the drainage pipe joint 200, when installed in a building, has a pipe body 210 disposed in a through hole of a floor slab S, and a floor slab An upper pipe connection part 120 connects a drainage standpipe 520 that projects above the floor slab S and allows drainage water to flow in from the upper floor, and a drainage pipe that projects below the floor slab S and connects the drainage standpipe 520 that allows drainage water to flow into the lower floor (here, the mounting member T A drainage pipe connection part 230 that connects a 90-degree vent pipe 540) suspended on the lower floor side of the floor slab S, and a horizontal branch pipe connection part 140 that connects the drainage horizontal branch pipe 510 above the floor slab S. Equipped with. In this way, the drain pipe joint 100 and the drain pipe joint 200 are different in the pipe main body 110 and the pipe main body 210, the drain pipe connection part 130 and the drain pipe connection part 230 are different, and the outer layer member 700 (described later) is different. The outer layer member 800 is different. That is, the drain pipe joint 100 and the drain pipe joint 200 have a common area above the floor slab S. These common parts are given the same reference numerals in the drain pipe joint 100 and the drain pipe joint 200.

As shown in these figures, the common part of the drainage pipe joint 100 and the drainage pipe joint 200 is that the side branch pipe connection part 140 is a water collection pipe with openings at three locations at 90° intervals in plan view. A chamber 142, a first lateral branch pipe connection member 144 for connecting a drainage lateral branch pipe, a second lateral branch pipe connection member 146, and a third lateral branch pipe corresponding to the position of the opening thereof. It is configured with a connecting member 148. Here, although not limited to, the first lateral branch pipe connecting member 144, the second lateral branch pipe connecting member 146, and the third lateral branch pipe connecting member 148 are not reduced in diameter, etc. Although a drainage horizontal branch pipe 510 is connected, the diameter of the pipe may change.

The pipe main body 110 of the drainage pipe joint 100 and the pipe main body 210 of the drainage pipe joint 200 differ in the following points. The pipe main body 210 has a shorter length in the drainage direction than the pipe main body 110, does not include the reduced diameter portion 118 (tapered shape) included in the pipe main body 110, and has a side branch pipe connection portion in the pipe main body 110 provided in the pipe main body 110. 140 and the drain pipe connection part 130, the swirl vane 114 as a protrusion protruding from the inner surface of the pipe body 110 is not provided. A recess 112 corresponding to this protrusion (here, the swirl vane 114) is formed on the outer surface of the tube body 110, and as shown in FIG. Filled. On the other hand, the tube body 210 includes a depression 212 in place of the depression 112 provided in the tube body 110, and as shown in FIG. 11, the depression 212 is filled with a putty-like thermally expandable refractory material 612.

Here, the thermally expandable refractory material 612 filled in the recess 112 or the recess 212 will be described. The thermally expandable fireproof material 612 is, for example, a resin composition containing a resin component mainly composed of butyl rubber, a phosphorus compound, neutralized thermally expandable graphite, a hydrous inorganic substance, 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 thermally expandable refractory material 612, for example, "Fiblock" (trade name) manufactured by Sekisui Chemical Co., Ltd. (expands 5 to 40 times at a reaction temperature of 200° C.) is used. In addition, there is also a product called "Thermally Expandable Heat Resistant Sealing Material IP" manufactured by Inaba Denki Sangyo Co., Ltd. (starts to expand at 120°C and expands by more than 4 times its volume), and manufactured by Furukawa Techno Materials Co., Ltd. As the thermally expandable refractory material 612, a product named "Heat Mel" (expansion start temperature: 120° C., significant expansion temperature: 260° C., expands 4 to 8 times) can be used.

Note that the thermally expandable fireproof material 612 is not limited to those mentioned above, and a wide variety of materials with different reaction temperatures and expansion coefficients can be used. You can select and use the optimal one that satisfies the following conditions.
The thermally expandable fireproof material 612 is formed into a non-hardening, non-drying putty, and is formed in the depression 112 on the outer surface of the pipe body 110 of the drainage pipe joint 100 or the depression 212 on the outer surface of the pipe main body 210 of the drainage pipe joint 200. is filled to the extent of the outer diameter of the tube body 110 or 210 (an amount that can sufficiently achieve the desired fire resistance with or without the thermally expandable fireproof sheet 712 described later). Filled.

Here, the protrusion provided on the pipe body 110 is not limited to the swirl vane 114 as long as it changes the flow of the drainage inside the drain pipe joint 100, and may be a drift plate or the like. The material is not limited to a swirl vane or a drift plate as long as it has a corresponding depression 112 formed on the outer surface of the tube body 110. Furthermore, the recess 212 provided in the tube body 210 is not limited to the illustrated shape. In any of the drain pipe joints 100 and 200, the thermally expandable fireproof material 612 is filled into the recesses on the outer peripheral surfaces of these drain pipe joints. As shown in FIG. 12(B), the depression provided in the tube body 210 is formed as the diameter of the tube body 210 is reduced, but the inner wall of the tube body 210 widens on the downstream side. Therefore, in order to distinguish it from the reduced diameter part 118 that the pipe main body 110 includes, the pipe main body 210 will not be described as having a reduced diameter part (tapered part).

Furthermore, as shown in FIGS. 3 and 5, a sheet-like thermally expandable fireproof sheet 712 is wound around the outer circumferential surface of the tube body 110 at a height position corresponding to the floor slab S of the tube body 110. The sheet-shaped thermally expandable fireproof sheet 712 is wound around the outer peripheral surface of the tube body 110 as shown in FIGS. 11 and 13 at a height position corresponding to the floor slab S of the tube body 210. It is provided. The thermally expandable fireproof material 612 and the thermally expandable fireproof sheet 712 are separated from each other in the vertical direction in the tube body 110, whereas in the tube body 210, they overlap each other in the radial direction without being separated in the vertical direction. It has a part that is In addition, the dashed-dotted line in FIG. 3 and FIG. 11 means removal.

In a building that employs such a drainage piping structure, when the drainage piping joint 100 or the drainage piping joint 200 or the like burns, the heat expands the thermally expandable fireproof material 612 and the thermally expandable fireproof sheet 712 in the radial direction. It expands inward, and the main body of the drain pipe joint 100 or 200 crushes the hollow part and closes the drain pipe joint 100 or the drain pipe joint 200. As a result, the drainage piping structure using the drainage piping joint 100 or the drainage piping joint 200 can shut off the pipe to prevent flames, smoke, etc. from flowing in the event of a fire.

Here, such thermally expandable refractories (thermally expandable refractories 612, thermally expandable fireproof sheets 712) are limited to those made of resin as described above, and as described later, If the thermally expandable fireproof sheet 712 of the expandable refractories is not provided (regardless of the reason in this part), it is preferable that a damping material 714 is provided in place of the thermally expandable fireproof sheet 712. .
Referring to FIGS. 5 to 7 for the drainage pipe joint 100 and FIGS. 13 to 14 for the drainage pipe joint 200, the outer periphery of the pipe main body 110 or the outer periphery of the pipe main body 210 and the drain pipe connecting portion 230. The outer layer member 700 and the outer layer member 800 provided so as to be wrapped around the outer layer member 700 will be explained.

As shown in these figures, the outer layer member 700 and the outer layer member 800 have a three-layer structure, and a damping material 714 (or a thermally expandable fireproof sheet 712 ), a vibration insulator 720 or 820 made of fire-resistant inorganic fiber, and a sound insulation cover 730 are provided in this order on the outer surface of the pipe body 110 or on the outer surface of the pipe body 210 and the drain pipe connecting portion 230. The vibration insulator 720 and the vibration insulator 820 have different shapes when unfolded, as will be described in detail later.
The hollows 112 or 212 are filled with a thermally expandable fireproofing material 612, which exhibits fireproofing performance (fire spread prevention function), and the hollows 112 or 212 are filled with a putty-like thermally expandable fireproofing material 612. By being filled with the material 612, vibration damping performance and sound insulation performance are also exhibited.

In the drain pipe joint 100, the damping material 714 is coated with an adhesive or adhesive, for example, on the outer surface of the pipe body 110 so as to cover the thermally expandable fireproof material 612 filled in the recess 112. ) is attached. Regarding the fire resistance performance, a thermally expandable fireproof sheet 712 is placed on the outer surface of the tube body 110 in place of the vibration damping material 714 at a position of the tube body 110 above the portion of the recess 112 filled with the thermally expandable fireproof material 612. is pasted on. In this way, the thermally expandable fireproof sheet 712 affixed to the outer surface of the tube body 110 exhibits vibration damping performance in the same way as the vibration damping material 714 (although the performance may not be the same). Further, in the drain pipe joint 200, the damping material 714 is attached to the outer surface of the drain pipe connecting portion 230 (for example, with adhesive or adhesive). Regarding fire resistance, a thermally expandable fireproof sheet 712 is attached to the outer surface of the pipe body 210 in place of the damping material 714 at a position of the pipe body 210 above the drain pipe connection part 230 (and The recess 212 is filled with a thermally expandable refractory material 612 on the radially inner circumferential side). In this way, the thermally expandable fireproof sheet 712 attached to the outer surface of the tube body 210 exhibits vibration damping performance in the same way as the vibration damping material 714 (although the performance may not be the same).

As will be described in detail later, the thermally expandable fireproof material 612 and the thermally expandable fireproof sheet 712 have different coefficients of thermal expansion. Here, it is generally said that when a thermally expandable refractory material has a high coefficient of thermal expansion, it has low shape retention after expansion, and when it has a low coefficient of thermal expansion, it has high shape retention after expansion. If the thermal expansion coefficient is low, there is a possibility that sufficient fire resistance performance cannot be expressed, and if the shape retention is low, the thermal expansion material may fall. Considering this trade-off characteristic and the coefficient of thermal expansion (and the absolute value of the difference, etc.), the thermal expansion is adjusted to correspond to each position, weight, shape, reaction rate, and expansion start temperature, etc. Thermal expandable materials contained in the refractory material 612 and the thermally expandable fireproof sheet 712 are selected.

In this way, the innermost layer 710 in this three-layer structure is either the thermally expandable fireproof sheet 712 or the damping material 714.
The damping material 714 is made of a butyl-based material (butyl rubber, etc.) or an asphalt-based material (rubber asphalt, modified asphalt, etc.), and the sound insulation cover 730 is made of a rubber-based material (EPDM (ethylene propylene diene rubber), etc.). The vibration insulator 720 and the vibration insulator 820 are made of an elastomer-based or olefin-based material (polyethylene resin, etc.) and made of fire-resistant inorganic fibers. (materials).

Here, examples of the inorganic fibers include artificial mineral fibers, such as glass wool, rock wool, and ceramic fibers, which are preferable not only because they have high vibration insulation performance but also because they have high sound absorption performance. After suppressing vibrations caused by drainage flowing down the pipe body 110 or the pipe body 210 and the drain pipe connection part 230 (for example, vibrations generated by hitting the swirling blades 114) with the vibration damping material 714, the damping material 714 is further made of rock wool or the like. The vibration insulator 720 is used to isolate vibrations (and/or absorb the noise associated with the vibrations), and the sound insulation cover 730 made of a rubber cover such as EPDM blocks the propagation of the noise associated with the vibrations. . Rock wool is a general term for materials manufactured from natural rock or steel slag such as blast furnace slag, and glass wool is a general term for cotton-like materials made of glass fibers, both of which are fire-resistant. and has flame-retardant properties.

Note that in the following, a case will be described in which butyl rubber is used as the vibration damping material 714, rock wool is used as the vibration insulator 720, and an EPDM rubber cover is used as the sound insulation cover 730. Materials are just one example.
When this rock wool is used as the vibration insulator 720, it is preferable to use a sheet-like rock wool manufactured by paper making. However, the rock wool sheet manufactured by papermaking in this way cannot be processed to form the three-dimensional shape (straight pipe part + reduced diameter part (tapered part)) of the pipe body 110 in the drainage pipe joint 100 by sewing or the like. It is difficult to make a planar rock wool sheet (hereinafter referred to simply as rock wool, but even in that case, the shape of the vibration insulator 720 in the present invention is preferably sheet-like) without sewing or the like. For example, even if it is set on the tube body 110 by pasting it with tape, it may fall off in the event of a fire. Therefore, the developed shape (planar shape) of the rock wool sheet is, for example, as shown in FIG. 8(A).

In this way, even if the floor slab S is thin, the cut can be made to appear only at one location in the vertical direction (vertical direction in the tube body 110). Furthermore, in the developed view of the rock wool sheet shown in FIG. In order to accommodate the reduced diameter part (tapered part), Fig. 8(A) shows that cuts (more specifically, narrow grooves 722, which will be described later, and cuts in five places) are made at the position of the floor slab S in the rock wool sheet. In contrast, in FIG. 8(B), the rectangle and the partially annular shape are joined by a circular arc. In the case of the developed view shown in Figure 8(A), the cut is at the location of the floor slab S, so even if there is a cut in this part (this part may be mechanically weak or have poor fire resistance), Since the location is the floor slab S and the floor slab S does not burn, there is no problem with the fire resistance of rock wool and it will not fall in the event of a fire. On the other hand, in the developed view of the rock wool sheet shown in FIG. Due to the short length of the joint and the heavy weight of the partially annular shape joined at the bottom, there is a possibility that the rock wool sheet could break at this joint and fall in the event of a fire. . Note that details of the shape of the vibration insulator 720 and the effects based on the shape will be described later. Regarding the vibration insulator 820, in the drain pipe joint 200, the pipe main body 210 and the drain pipe connecting portion 230 on which the vibration insulator 820 is provided have a substantially straight pipe shape, and the pipe main body 110 has a three-dimensional shape (straight). Since the rock wool sheet does not have a tube part + reduced diameter part (tapered part), it is not necessary to use the developed rock wool sheet shown in FIG. 8(A), but it is possible to use it. .

Furthermore, the vibration insulator 720 using this rock wool is loose and extends all around the inner layer in order to suppress noise propagation due to resonance with the vibration damping material 714 or the thermally expandable fireproof sheet 712. It is provided so that it is fixed at several places in the circumferential direction, rather than being fixed at a single point. In particular, regarding the height positions of several fixing positions in the circumferential direction where the rock wool is fixed (more specifically, the rock wool is fixed to the EPDM rubber cover as the sound insulating cover 730), the thermal expansion material ( It is located above the thermally expandable fireproof material 612 and the thermally expandable fireproof sheet 712), and prevents the rock wool from falling in the event of a fire. An example of a mounting method for preventing the device from falling is bonding using an adhesive, double-sided tape, or the like.

In the following, a manufacturing method (not a construction method) of a drainage pipe joint 100 equipped with the outer layer member 700 or a drainage pipe joint 200 equipped with the outer layer member 800 having a three-layer structure, and a method of manufacturing the outer layer member 700 or the outer layer member 800 will be described. The installation procedure will be explained.
First, the depression 112 or the depression 212 is filled with a putty-like thermally expandable refractory material 612. Then, a thermally expandable fireproof sheet 712 is applied. In the drainage pipe joint 100, the thermally expandable fireproof sheet 712 is separated from the putty-like thermally expandable fireproof material 612, but in the drainage pipe joint 200, all or A thermally expandable fireproof sheet 712 is attached so as to partially cover it. Furthermore, the damping material 714 is attached to the outer peripheral surface of the pipe body 110 or the drain pipe connecting portion 230 using an adhesive or adhesive. At this time, in the innermost layer 710 in this three-layer structure, either the thermally expandable fireproof sheet 712 or the damping material 714 is present. Although not layered, in these drainage pipe joints 100 and 200, there is a thermally expandable fireproof material 612 filled in the depressions 112 or 212 on the inner layer side of the thermally expandable fireproof sheet 712. do.

A rock wool sheet as a vibration insulator 720 (a developed view is shown in FIG. 8(A)) or a rock wool sheet as a vibration insulator 820 (a developed view is shown in FIG. Wrap a rectangular rock wool sheet (not shown in the figure). Further, a rubber cover made of EPDM as a sound insulating cover 730 is placed over it. Here, the rubber cover made of EPDM as the sound insulating cover 730 exhibits water stopping properties, sound insulating properties, and vibration insulating properties. Note that the EPDM rubber cover as the sound insulation cover 730 may be integrally molded and adhered to the drain pipe joint 100 or the drain pipe joint 200 to exhibit water-stopping properties, or it may not be glued (rubber). The water-stopping property may be expressed only by tension (expressed due to the elasticity of the material). In this case, as shown in the cross-sectional shape shown in FIGS. 5 to 7 or 13 to 14, the upper end of the EPDM rubber cover serving as the sound insulating cover 730 has an annular thick upper end. It is also preferable to provide an annular and thick lower end water stop part 734 at the water stop part 732 and/or the lower end (although the diameter is different) to improve water stop performance.

According to the drainage pipe joint 100 or the drainage pipe joint 200 whose outline was explained above, it is formed of one or more resin injection molded products, is provided through the floor slab S of the building, and is fireproof. It is possible to fully demonstrate performance and suppress drainage vibration. In particular, in the outer layer member 700 or the outer layer member 800 having a three-layer structure, a damping material 714 made of butyl rubber as an example of the innermost layer 710 is applied to the outer surface of the pipe body 110 or the outer surface of the pipe body 210 and the drain pipe connecting portion 230. A vibration insulator 720, for example a rock wool sheet, or a vibration insulator 820 (which has a developed shape different from the vibration insulator 720) as an intermediate layer, is provided in close contact to suppress vibration very effectively, and is loosely and in number. A sound insulation cover 730, an example of which is a rubber cover made of EPDM, is provided as the outermost layer to exhibit sound absorption, fire resistance, sound insulation, and vibration insulation by fixing it in place. The damping material 714 suppresses vibrations caused by drainage flowing down the pipe main body 110 or the pipe main body 210 and the drain pipe connection part 230 (for example, generated by hitting the swirling blade 114), and then provides vibration insulation. The body 720 or the vibration insulator 820 further blocks vibrations, and the sound insulating cover 730 blocks the generation of noise caused by the vibrations, so that drainage vibration can be suppressed very effectively. In addition, two thermally expandable fireproofing materials (thermally expandable fireproofing material 612 and thermally expandable fireproofing sheet 712) are provided, and the outside thereof is covered with a plurality of layers including a layer that exhibits fireproof performance. Because of this, it is possible to fully demonstrate its fire resistance performance.

Next, the drainage pipe joint 100 or the drainage pipe joint 200 will be described in more detail below. Note that the point that the drainage pipe joint 100 is referred to in FIGS. 1 to 8 and the drainage pipe joint 200 is referred to in FIGS. 9 to 15 is the same as the above-mentioned general description. Further, the common configuration between the drain pipe joint 100 and the drain pipe joint 200 may be explained using the drain pipe joint 100 as a representative.

<Vibration damping material: Basically, drainage pipe joints are not limited to resin.>
The damping material 714 of the innermost layer 710 constituting the outer layer member 700 of the drain pipe joint 100 is integrally provided on at least a part of the outer circumferential surface of the pipe body 110 at least in the portion passing through the through hole of the floor slab S. There is. Note that it is not limited to the one provided on the entire outer circumferential surface of the tube body 110, and even if it is provided only on a part of the outer circumferential surface of the tube body 110 (if the position overlaps with the floor slab S). ) I don't care. Further, the damping material 714 of the innermost layer 710 constituting the outer layer member 800 of the drain pipe joint 200 is integrally provided on at least a portion of the outer circumferential surface of the pipe body 210 at least in the portion passing through the through hole of the floor slab S. It is also provided at the drain pipe connection part 230. Note that it is not limited to the one provided on the entire outer circumferential surface of the tube body 210, and even if it is provided only on a part of the outer circumferential surface of the tube body 210 (if the position overlaps with the floor slab S). ) I don't care. Here, unlike FIGS. 10 to 14, a damping material 714 is integrally provided in the tube body 210 instead of the thermally expandable fireproof sheet 712.

The damping material 714 is preferably provided integrally with adhesive or adhesive on the entire outer peripheral surface on which the damping material 714 is provided. Further, it is preferable that the damping material 714 is formed into a sheet shape and wrapped around the outer peripheral surface.
In this way, the damping material 714, for example, butyl rubber, is applied as the innermost layer 710 to at least a portion of the outer peripheral surface (outer surface) of the pipe body 110 or the outer peripheral surface (outer surface) of the pipe main body 210 and the drain pipe connecting portion 230. By providing it in close contact with the drain pipe joint, it is possible to extremely effectively suppress vibrations generated in the drain pipe joint.

Further, it is also preferable to provide an outer layer member with a two-layer structure in which a vibration insulator 720 or a vibration insulator 820 such as rock wool is provided on the outer periphery of the vibration damping material 714. It is also preferable that the outer layer member has a three-layer structure in which a sound insulating cover 730, for example a rubber cover made of EPDM, is provided on the outer periphery of the body 820. When employing this three-layer structure, it is preferable that the vibration insulator 720 or the vibration insulator 820 be fixed to the sound insulation cover 730 on the outer layer side rather than the vibration damping material 714 on the inner layer side.

More specifically, in the drain pipe joint 100, the pipe body 110 includes at least a straight pipe section 116 and a reduced diameter section 118 below the straight pipe section 116, and in this case, the vibration insulator 720 is preferably provided so as to be intermittently fixed in the circumferential direction of the sound insulating cover 730 in a height range corresponding to the straight pipe portion 116. Further, in the drain pipe joint 100 and the drain pipe joint 200, the vibration insulator 720 or the vibration insulator 820 is provided so as to be fixed at two to four points in the circumferential direction of the sound insulation cover 730 on the outer layer side. It is preferable.

In this way, as an intermediate layer, the vibration insulator 720, for example a rock wool sheet, or the vibration insulator 820 (the developed shape is different from the vibration insulator 720) is used loosely and in several places instead of the damping material 714 on the inner layer side. By fixing it to the sound insulation cover 730 on the outer layer side, sound absorption and fire resistance (when a thermally expandable fire resistance material is provided in place of/in addition to the vibration damping material 714), sound insulation and vibration insulation are exhibited. , by providing a sound insulating cover 730, for example a rubber cover made of EPDM, as the outermost layer to exhibit water-stopping properties, sound insulating properties, and vibration insulating properties, thereby extremely effectively suppressing vibrations generated in the drain pipe joint. I can do it.

In addition, as mentioned above, if these drainage piping joints 100 and 200 are formed of one or more (seven in this case) resin injection molded products (non-fire resistant) (drain piping In the case where the joint is limited to resin, a sheet-like thermally expandable fireproof sheet 712 is used in place of at least a portion of the vibration damping material 714 at least in the through hole of the floor slab S in the pipe body 110 or the pipe body 210. It is also preferable to include a portion provided (attached) to the outer circumferential surface of the portion passing through. In this case, in the drainage pipe joint 100, a sheet-shaped thermally expandable fireproof sheet 712 is provided on the pipe body 110 in place of a portion of the damping material 714 provided on the pipe body 110. In the drainage pipe joint 200, a sheet-like thermally expandable fireproof sheet 712 is provided (attached) to the pipe body 210 in place of all the damping material 714 provided on the pipe body 210.

In this way, when the drain pipe joint 100 or the drain pipe joint 200 or the like burns, the thermally expandable fireproof sheet 712 expands radially inward due to the heat, and the hollow of the drain pipe joint 100 or the drain pipe joint 200 is expanded. By crushing the drain pipe joint 100 or the drainage pipe joint 200, the drainage pipe structure using the drainage pipe joint 100 or the drainage pipe joint 200 can be constructed to prevent flames, smoke, etc. from circulating in the event of a fire. road can be blocked.

Further, in the drain pipe joint 100, the pipe body 110 includes at least a straight pipe portion 116 and a reduced diameter portion 118 below the straight pipe portion 116, and in this case, the inner layer of the vibration insulator 720 A thermally expandable fireproof sheet 712 is provided on the side in place of a part of the vibration damping material 714, and vibration insulation is provided at a position above the thermally expandable fireproof sheet 712 and at a height corresponding to the straight pipe section 116. It is also preferable that the body 720 is fixed to a sound insulating cover 730 on the outer layer side.

In this way, even if the drain pipe joint 100 or the like burns, the straight pipe portion 116 is located at a position above the height of the drain pipe joint 100 blocked by the thermally expandable fireproof sheet 712. Since the vibration insulator 720 is fixed to the sound insulation cover 730 on the outer layer side at the corresponding height position, the vibration insulator 720 can be prevented from falling in the event of a fire.

<Sound insulation cover: Basically, drainage pipe joints are not limited to resin.>
The outermost sound insulating cover 730 constituting the outer layer member 700 of the drainage pipe joint 100 is located above and below a vibration insulator 720 provided on at least a portion of the outer periphery of the portion of the pipe body 110 that passes through the through hole of the floor slab S. It is provided on the outer periphery of the vibration insulator 720 over the entire length in the direction. The outermost layer sound insulating cover 730 constituting the outer layer member 800 of the drain pipe joint 200 is located above and below a vibration insulator 820 provided on at least a portion of the outer periphery of the portion of the pipe body 210 that passes through the through hole of the floor slab S. It is provided on the outer periphery of the vibration insulator 820 over the entire length in the direction.

By providing the sound insulation cover 730, for example a rubber cover made of EPDM, on the outer periphery of the vibration insulator 720 or the vibration insulator 820 over the entire length in the vertical direction, high sound insulation performance can be achieved.
This sound insulating cover 730, for example a rubber cover made of EPDM, has a water stopping effect, a sound insulating effect, and a vibration insulating effect. Therefore, in addition to the above-mentioned sound insulation performance, it is possible to exhibit high water-stopping performance and high vibration insulation performance.

Moreover, this sound insulation cover 730 preferably includes an upper end water stop part 732 at the upper end and/or a lower end water stop part 734 at the lower end. 734 is provided so as to be in contact with the outer surface of the drain pipe joint 100 or the drain pipe joint 200 (including the case where it is joined and abutted with an adhesive or the like). The upper end water stop portion 732 and the lower end water stop portion 734 are formed of a thick wall portion that is thicker than the main body of the sound insulating cover 730. Therefore, it can exhibit high water-stopping performance and is also excellent in strength.

Further, this sound insulation cover 730 is integrated with a cover main body that includes an upper end water stop portion 732 and/or a lower end water stop portion 734 and has a length corresponding to the entire vertical length of the vibration insulator 720 or the vibration insulator 820. It is preferable that the sound insulating cover 730 itself has elasticity.
When the sound insulation cover 730 itself has elasticity in this way, it is possible to provide the vibration insulator 720 or the vibration insulator 820 on the outer periphery thereof over the entire length in the vertical direction by using the elasticity of the sound insulation cover 730 itself. can.

<Vibration insulator: Basically, the drainage pipe joint is not limited to resin, but a reduced diameter part is required.>
In the drain pipe joint 100, the pipe main body 110 includes at least a straight pipe portion 116 and a reduced diameter portion 118 below the straight pipe portion 116, and in this case, the outer layer member 700 of the drain pipe joint 100 The intermediate layer vibration insulator 720 constituting the tube body 110 is provided on at least a portion of the outer periphery of the portion of the tube body 110 that passes through the through hole of the floor slab S. The vibration insulator 720 is a sheet having a predetermined shape shown in FIG. 8(A) in the unfolded state (here, it may have the shape of the vibration insulator 726 shown in FIG. 8(B)). The sheet is wound around the outer circumferential surface of the straight tube section 116 and the reduced diameter section 118, with the edges of the sheet in contact with each other. Furthermore, after the drainage pipe joint 100 has been installed in the building, and in a state where there is no attachment on the outer periphery of the vibration insulator 720, the vibration insulator 720 is as shown in FIGS. 5 to 8. , the edges are brought into contact with each other without being exposed to the upper floor side of the floor slab S, including the portion where the edges 720S1 or edges 726S1 shown in FIG. 8(A) or FIG. 8(B) are in contact with each other. The lower floor side of the floor slab S with only one contact point (dotted chain line where the edges 720S2 or 726S2 in FIG. 8(A) or 8(B) are in contact with each other) It is set up to be exposed to.

Therefore, even if the floor slab S is thin, there is one cut in the vibration insulator 720 or the vibration insulator 726 in the vertical direction (vertical direction in the tube body 110) (a cut where the edges 720S2 or edges 726S2 touch each other). ), in order to prevent the floor slab S from burning, and to prevent the floor slab S from burning, the cut of the vibration insulator 720, which has weak strength, can be seen from the floor slab S in the vertical direction (vertical direction in the pipe body 110) 1 Since the vibration insulator 720 only appears in certain areas, there is no problem with the fire resistance of the vibration insulator 720, and it can be prevented from falling in the event of a fire.

More specifically, as shown in FIG. 8(A), the predetermined shape of the vibration insulator 720 is a partially annular shape, and the vibration insulator 720 has a partially annular shape, and the floor A plurality of (here, five) narrow grooves 722 are provided, each having a length L(2) corresponding to the length L(1) of the vibration insulator 720 covered by the slab S, and each having a predetermined width. Note that the outer peripheral side of the ring is above the tube main body 110. A straight pipe by closing each of the plurality of narrow grooves 722 (by bringing the groove sides 722S forming each of the narrow grooves 722 into contact with each other, and by bringing the edge edges 720S1 of the sheet into contact with each other). The sheet is wrapped around the outer circumferential surface of the section 116, and is also wound around the outer circumferential surface of the reduced diameter section 118 with the end edges 720S2 of the sheet in contact with each other.

By wrapping the vibration insulator 720 as a sheet in such a developed shape around the outer peripheral surface of the tube body 110, the tube body 110 can be connected to the straight tube portion 116 and the reduced diameter portion 118 below the straight tube portion 116. Even in the case where the vibration insulator 720 is provided with at least one of the following, there is no problem with the fire resistance of the vibration insulator 720, and the vibration insulator 720 will not fall in the event of a fire.
In particular, when a paper-made rock wool sheet is used as the vibration insulator 720, the paper-made rock wool sheet is sewn into the three-dimensional shape of the pipe body 110 in the drainage pipe joint 100 (straight pipe). Although it is difficult to form the vibration insulator 720 on the tube body 110 without sewing the vibration insulator 720, the vibration insulator 720 can fall off in the event of a fire. This can be prevented.

<Thermally expandable fireproof material: Drainage piping joints are basically limited to resin.>
In the drain pipe joint 100 or the drain pipe joint 200, two types of thermally expandable fireproof materials having different coefficients of thermal expansion, a thermally expandable fireproof material 612 and a thermally expandable fireproof sheet 712, are provided. , will be explained in detail with reference to FIG.
First, in the case where two types of thermally expandable fireproof materials are provided at different positions in the radial direction in the drain pipe joint 100 or the drain pipe joint 200, as shown in FIG. It is preferable that the thermally expandable refractory material provided has a higher coefficient of thermal expansion than the thermally expandable refractory material provided on the outer layer side.

Next, in the case where two types of thermally expandable fireproof materials are provided at different positions in the vertical direction in these drainage pipe joints 100 or 200, as shown in FIG. 15(B), It is preferable that the thermally expandable refractory material provided below has a higher coefficient of thermal expansion than the thermally expandable refractory material provided below. Note that, as will be described later, there are cases where this relationship between the coefficients of thermal expansion in the vertical direction does not hold (as an example, the drain pipe joint 100).

Here, as mentioned above, in general, when a thermally expandable refractory material has a high coefficient of thermal expansion, its shape retention after expansion is low, and when its coefficient of thermal expansion is low, it is said that its shape retention after expansion is high. Therefore, as shown in Figure 15 (A) and Figure 15 (B), if the coefficient of thermal expansion is low, sufficient fire resistance performance may not be achieved, and if the shape retention is low, the thermal expansion material may fall. A relationship with trade-off characteristics is established in which there is a possibility that the Taking these characteristics into consideration (utilizing the characteristics), two types of thermally expandable refractory materials are selected in accordance with their respective positions, weights, shapes, reaction rates, and expansion start temperatures, etc. .

Regarding the characteristics depending on the shape of the heat-expandable fireproof material, between the putty-like and sheet-like shapes adopted in this embodiment, as shown in FIG. 15(C), the putty-like heat-expandable fireproof material is generally more has a higher coefficient of thermal expansion than sheet-shaped thermally expandable refractory materials.
Referring to Fig. 15(D), there is a possibility that the arrangement of thermally expandable refractory material will be adopted for the drainage pipe joint (which will be installed in the through hole of the floor slab S, but it does not matter whether there is a reduced diameter part)4 Explain one example.

First, the second example shown in FIG. 15(D) corresponds to FIG. 15(A), and corresponds to the drain pipe joint 200 according to the second embodiment. When the height direction positions are the same (here, the same means that there is not enough difference in the height direction to consider the placement of the thermally expandable refractory material), but the radial positions are different. The coefficient of thermal expansion of the thermally expandable refractory material on the inner layer side in the radial direction is higher than the thermal expansion coefficient of the thermally expandable refractory material on the outer layer side. More specifically, in the drain pipe joint 200, a putty-like heat-expandable fire-resistant material 612 filled in the depression 212 is employed as the heat-expandable fire-resistant material on the inner layer side, and a putty-like heat-expandable fire-resistant material 612 is used as the heat-expandable fire-resistant material on the outer layer side. As such, a heat-expandable fire-resistant sheet 712 is provided so as to be in contact with the outer layer of the putty-like heat-expandable fire-resistant material 612 filled in the depression 212. Since the putty-like material has a higher coefficient of thermal expansion than the sheet-like material, the thermally expandable fireproof material 612 on the inner layer side has a higher thermal expansion coefficient than the thermally expandable fireproof sheet 712 on the outer layer side.

Next, the third example shown in FIG. 15(D) corresponds to FIG. 15(B), and the radial position is the same (here, the same means thermally expandable refractory material. (This means that there is not enough difference in the radial direction to consider the placement of Higher coefficient of thermal expansion than expansible refractory materials.
Furthermore, in the fourth example shown in FIG. 15(D), when both the radial and height positions are different, the height direction is on the upper side and the thermal expansion coefficient is on the radial inner layer side. A high thermal expansion refractory material is arranged, and a thermal expansion refractory material with a low coefficient of thermal expansion is arranged on the lower side in the height direction and on the outer layer side in the radial direction.

Finally, the first example shown in FIG. 15(D) corresponds to the drainage pipe joint 100 according to the first embodiment. In this case, since two types of thermally expandable refractory materials are provided at different positions in the vertical direction, normally, as shown in FIG. (as in the second example and the fourth example) A thermally expandable refractory material with a high coefficient of thermal expansion is placed above the height position, and a thermally expandable refractory material with a low coefficient of thermal expansion is placed below the height position. However, in the drain pipe joint 100, the putty-like heat-expandable fire-resistant material 612 filled in the depression 112 is used as the lower heat-expandable fire-resistant material, and the putty-like heat-expandable fire-resistant material 612 is used as the upper heat-expandable fire-resistant material. , a sheet-shaped thermally expandable fireproof sheet 712 is employed. Since the putty-like material has a higher coefficient of thermal expansion than the sheet-like material, the lower thermally expandable fireproof material 612 has a higher thermal expansion coefficient than the upper thermally expandable fireproof sheet 712, as shown in FIG. 15(B). It doesn't follow.

In this drainage pipe joint 100, the pipe body 110 has a reduced diameter part 118 below the straight pipe part 116, and the reduced diameter part 118 is made of a putty-like thermally expandable fireproof material 612 with a high coefficient of thermal expansion. Then, the reduced diameter portion 118 having a small pipe diameter is quickly closed with a putty-like thermally expandable refractory material 612 having a high coefficient of thermal expansion. On the other hand, since the shape stability is low (it becomes easy to fall), the outer layer side of the thermally expandable fireproofing material 612 is coated with a vibration insulator 720 typified by rock wool, which also has fireproofing and flameproofing properties. At the same time, the putty-like thermally expandable refractory material 612 is prevented from falling by being held by the shape of the reduced diameter part 118 whose pipe diameter is gradually decreasing, thereby compensating for the low dimensional stability. ing.

As described above, there may be exceptions in the height direction in the arrangement of the thermally expandable refractory material based on the coefficient of thermal expansion. The thermally expandable refractory material in FIG. 15(D) is represented by a rectangular shape that indicates a sheet shape, but the thermally expandable refractory material in FIG. 15(D) may be in the form of a putty or a sheet. It doesn't matter whether it is a combination of sheet and sheet, a combination of putty and putty, or a combination of sheet and putty, and there are two types of thermal expansion with different coefficients of thermal expansion. As long as a refractory material is employed, the scope of the present invention is not limited to two locations, but also includes a third type of thermally expandable refractory material employed at a third location.

In addition to the example of the arrangement of the thermally expandable refractory material described above, in the case where the pipe main body 110 includes at least a straight pipe part 116 and a reduced diameter part 118 below this straight pipe part 116, Another example is that two types of thermally expandable refractory materials are provided at different positions in the radial direction in the height range of the tube portion 116.
Furthermore, another example is that the straight pipe portion 116 and the reduced diameter portion 118 are provided with two types of thermally expandable refractory materials having different coefficients of thermal expansion. For example, the drainage pipe joint 100 is such an example.

Another example is that two types of thermally expandable refractory materials having different coefficients of thermal expansion are provided so as to have portions that overlap with each other. For example, the drain pipe joint 200 is such an example.
Another example is that at least one of the two types of thermally expandable fireproof materials having different coefficients of thermal expansion is provided at a position corresponding to the floor slab S. For example, the drain pipe joint 100 and the drain pipe joint 200 are such examples, in which the thermally expandable fireproof sheet 712 is obstructed by the floor slab S and cannot expand toward the outer layer, but can only expand toward the inner layer in the radial direction. Therefore, the hollow portion of the drain pipe joint 100 or the drain pipe joint 200 can be quickly crushed and closed.

As described above, such thermally expandable fireproof materials having different coefficients of thermal expansion may be in the form of a sheet and provided in an annular shape around the straight pipe portion 116 provided in the drainage pipe joint 100, or may be in the form of a putty. It is preferable that the recess 112 of the drainage pipe joint 100 or the recess 212 of the drainage pipe joint 200 be filled. In this way, the sheet-like thermally expandable refractory material provided in an annular form and the putty-like thermally expandable refractory material provided in a filled form can exhibit vibration damping properties.

<Construction method for drainage piping joints: Drainage piping joints are basically limited to those made of resin>
A construction method for arranging and constructing a drainage pipe joint in a through hole of a floor slab S of a building will be described below.
Drainage pipe joints suitably employed in this construction method further include the following structural features in the drainage pipe joint 100 and the drainage pipe joint 200. In the following, the drainage pipe joint 100 will be explained as a representative example.

This drainage pipe joint 100 is entirely formed of one or more resin injection molded products, and when installed in a building, it includes a pipe main body 110 that is placed in a through hole of a floor slab S, A standpipe connection part 120 connects a drainage standpipe 520 that protrudes above the floor slab S and allows wastewater from the upper floor to flow in, and a drainpipe (here, A drainage pipe joint comprising a drainage pipe connection part 130 that connects a drainage standpipe 530) and a horizontal branch pipe connection part 140 that connects a drainage horizontal branch pipe 510 above the floor slab S thereof. As a feature, the standpipe connecting part 120 or the side branch pipe connecting part 140 is formed of transparent resin, and a damping material 714 is provided integrally with the pipe main body 110 on at least a part of the outer peripheral surface of the pipe main body 110. The socket part of the standpipe connection part 120 or the socket part of the side branch pipe connection part 140 is not provided with a shield that makes the transparent resin invisible. As described above, in this drainage pipe joint 100, the damping material 714 is integrally formed with the pipe main body 110 on at least a part of the outer peripheral surface of the pipe main body 110 at least in the portion passing through the through hole of the floor slab S. The standpipe connection part 120 or the side branch pipe connection part 140 is formed of transparent resin, and the socket part of the risepipe connection part 120 or the socket part of the side branch pipe connection part 140 is made of the transparent resin. There shall be no obstructions that prevent visual inspection.

As shown in FIG. 5, in this drainage pipe joint 100, the riser pipe connection part 120 or the side branch pipe connection part 140 is made of transparent (including colorless transparent and colored transparent) resin, and the riser pipe connection part 120 or the side branch pipe connection part 140 is made of transparent (including colorless transparent and colored transparent) resin. The socket portion of the portion 120 or the socket portion of the side branch pipe connection portion 140 is not provided with a shield that prevents the transparent resin from being visually visible. Here, before construction, damping materials 714 are provided in areas other than the socket portion of the standpipe connection portion 120 or other than the socket portion of the side branch pipe connection portion 140, but these damping materials 714 may not be provided at all and may be provided as an afterthought after construction.

A construction method in which the drainage pipe joint 100 further equipped with such structural features is placed in a through hole of a floor slab S of a building is a construction method in which the drain pipe joint 100 is installed in a through hole of a floor slab S of a building. The drainage standpipe 520 can be connected to the risepipe connection part 120 by visually recognizing (while recognizing) the status of the drain pipe through the transparent resin of the risepipe connection part 120, or the drainage standpipe 520 can be connected to the side branch pipe connection part 140 and the drainage side pipe connection part 140. The drainage lateral branch pipe 510 is connected to the lateral branch pipe connection part 140 by visually recognizing (while recognizing) the fitting state with the branch pipe 510 through the transparent resin of the lateral branch pipe connection part 140.

Then, while visually checking (recognizing) the transparent resin socket part, connect the drain standpipe 520 to the standpipe connection part 120 or connect the drain side pipe 510 to the side branch pipe connection part 140. Furthermore, after the arrangement of the drain pipe joint 100 in the through hole of the floor slab S is completed, the gap between the through hole of the floor slab S and the drain pipe joint 100 is filled with mortar M.
Further, after filling with this mortar M, a sound insulating member is provided on the outer periphery of the riser pipe connecting portion 120 or the outer periphery of the side branch pipe connecting portion 140. This sound insulating member is different from the above-described sound insulating cover 730 (in some cases they are the same, but basically), and in addition to the sound insulating properties as the name suggests, it has vibration damping properties and/or vibration insulating properties. It is written as a general name. As an example of such a sound insulating member, the above-described damping material 714 may be provided at the socket, or instead of/in addition to this damping material 714, a vibration insulator 720 typified by the above-mentioned rock wool and/or EPDM may be used. Alternatively, a sound insulating cover 730 made of a rubber cover such as a rubber cover made of aluminum or the like may be provided, or instead of/in addition to this damping material 714, a vibration insulator made of glass wool, which is different from rock wool, and/or a cover made of vinyl chloride or the like may be provided. Install a soundproof cover. In this case, in the socket part of the standpipe connecting part 120 or the side branch pipe connecting part 140 (including the socket part if the damping material 714 is not provided other than the socket part before construction) It is also preferable to provide a damping material 714 (also in other parts) on the inner layer side of this sound insulating member.

In this case, the sound insulation member may be installed so as to cover the drain pipe joint 100 from the outer periphery, or the sound insulation member may be provided with glass wool as a sound absorbing material and a sound insulation sheet made of vinyl chloride as a sound insulation cover. The sound absorbing material made of glass wool is fixed to the vinyl chloride sound insulating cover on the outer layer side (instead of the vibration damping material 714 on the inner layer side) (including the case where it is fixed by sewing, adhesive, etc.). It is constructed by

In this way, before construction of the drain pipe joint 100, the socket portion of the standpipe connection part 120 or the side branch pipe connection part 140 made of transparent resin does not have a shield that prevents the transparent resin from being visually visible. In order to do this, the fitted state of the standpipe connecting part 120 and the drain standpipe 520 or the fitted state of the side branch pipe connecting part 140 and the drain side branch pipe 510 can be visually recognized through the transparent resin. Since the drain pipe can be connected, construction errors can be suppressed. In addition, since the sound insulating member containing rock wool, glass wool, etc. as a sound absorbing material is attached to the drain pipe joint 100 after backfilling with mortar M, the outer diameter of the drain pipe joint 100 does not increase when backfilling with mortar M, and the mortar It is easy to backfill the mortar M, and it is possible to eliminate the possibility that the moisture in the mortar M will scatter onto rock wool, glass wool, etc. and wet them.

As described above, the connection parts of the drain pipes of the drain pipe joint 100 are formed of transparent resin, and the transparent resin of the socket parts of those joint parts is made visible before construction (the transparent resin of the socket parts is In order to start the construction of the drain pipe joint 100 without any obstruction that would prevent it from being visually visible, the connection state between the drain pipe joint 100 and other drain pipes can be visually checked while the construction is being carried out. It is possible to suppress mistakes, and since a sound insulating material containing rock wool, glass wool, etc. as a sound absorbing material is provided after backfilling the mortar, it is easy to backfill the mortar M. In addition, the moisture in the mortar M makes it easier to backfill rock wool, glass wool, etc. This eliminates the possibility of it getting wet. After construction of this drainage pipe joint 100, as described above, drainage vibration can be suppressed extremely effectively, fire resistance can be sufficiently exhibited, and high water stop performance can be realized. or

It should be noted that the embodiments disclosed herein are illustrative in all respects and should not be considered restrictive. The scope of the present invention is indicated by the claims rather than the above description, and it is intended that all changes within the meaning and range equivalent to the claims are included.

The present invention is preferable for a drainage pipe joint that is installed through a floor slab S of a building, and is a drainage pipe joint that is installed through a floor slab of a building, and is capable of exhibiting an optimal fire spread prevention effect. It is particularly preferable.

100, 200 Drainage pipe joint 110, 210 Pipe body 112, 212 Hollow 114 Swivel vane 120 Upright pipe connection 130, 230 Drainage pipe connection 140 Side branch pipe connection 142 Water collection chamber 144, 146, 148 Side branch pipe connection Components 520 (Upper floor side) Drainage standpipe 530 (Lower floor side) Drainage standpipe 540 (Lower floor side) 90 degree (compact) vent pipe 612 Thermal expandable fireproof material 700, 800 Outer layer member 710 Innermost layer 712 Thermal expandability Fireproof sheet 714 Damping material 720, 820 Vibration insulator (formed from fireproof inorganic fiber) 730 Sound insulation cover

Claims (9)

It is formed of one or more resin injection molded products, and when installed in a building, it has a pipe body that is placed in a through hole in a floor slab, and a pipe that protrudes above the floor slab to allow drainage from the upper floor to flow in. a drain pipe connection section that connects a drainage standpipe that connects a drainage standpipe, a drainage pipe connection section that connects a drainage pipe that protrudes below the floor slab and drains wastewater to the lower floor, and a drainage horizontal branch pipe that connects the drainage pipe above the floor slab. A drainage pipe joint comprising a side branch pipe connection part to be connected,
A drainage pipe joint characterized by being provided with two types of thermally expandable fireproof materials having different coefficients of thermal expansion. The two types of thermally expandable refractory materials are provided at different positions in the radial direction of the drain pipe joint, and the thermally expandable refractory material provided on the inner layer side has a higher thermal expansion rate than the thermally expandable refractory material provided on the outer layer side. Drainage pipe fitting according to claim 1, characterized in that it has a high rate. The two types of thermally expandable refractory materials are provided at different positions in the vertical direction of the drain pipe joint, and the thermally expandable refractory material provided on the upper side and the thermally expandable refractory material provided on the lower side have the same coefficient of thermal expansion. The drainage pipe joint according to claim 1, characterized in that: The tube body includes at least a straight tube portion and a reduced diameter portion below the straight tube portion,
The drainage pipe according to any one of claims 1 to 3, characterized in that two types of thermally expandable fireproof materials are provided at different positions in the radial direction in the height range of the straight pipe part. Fittings. The tube body includes at least a straight tube portion and a reduced diameter portion below the straight tube portion,
The pipe according to any one of claims 1 to 3, characterized in that two types of thermally expandable refractory materials having different coefficients of thermal expansion are provided in the straight pipe part and the reduced diameter part, respectively. Drainage pipe fitting. The drain pipe joint according to any one of claims 1 to 5, wherein the two types of thermally expandable fireproof materials have mutually overlapping portions. The drainage pipe joint according to any one of claims 1 to 6, characterized in that at least one of the two types of thermally expandable fireproof materials is provided at a position corresponding to the floor slab. The thermally expandable fireproofing material may be in the form of a sheet and provided in an annular shape around a straight pipe portion of the drainage pipe joint, or may be in the form of a putty and filled in a depression provided in the drainage pipe joint. The drain pipe joint according to any one of claims 1 to 7, characterized in that it is provided in any of the filling forms provided. A damping property is exhibited by the sheet-like thermally expandable refractory material provided in the annular form and the putty-like thermally expandable refractory material provided in the filled form. 8. Drainage piping joint described in 8.

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