JP2024066999A - Drainage collection pipe for the lowest floor - Google Patents

Abstract

[Problem] To provide a resin drainage collecting pipe for the lowest floor that can exhibit an optimal fire spread prevention effect. [Solution] The drainage collecting pipe for the lowest floor (1060) includes a standard upper pipe (1100) and a lower pipe for the lowest floor (1560), the standard upper pipe (1100) includes an upper riser connection part (1110) for connecting an upper riser pipe and at least one horizontal branch pipe connection part (1120) for connecting a horizontal branch pipe, and the lower pipe for the lowest floor (1560) includes a reduced diameter part (1660) and a joint connection part (1570) for connecting a leg joint that drains drainage to a horizontal main pipe directly or via another pipe, and is covered with an outer layer member (1703). The innermost layer of the outer layer member 1703 is provided with a heat-expandable fireproof material 1712, whose height position is higher than the upper end (upper end of the lower pipe socket) of the lowermost floor lower pipe 1560 and lower than the upper end (upper end of the sound insulation cover 1730) of the outer layer member 1703, and only the upper pipe or the extension pipe exists on the inner circumference of this heat-expandable fireproof material 1712. [Selected Figure] Figure 9

Description

The present invention relates to a drainage collector pipe made of resin that is installed through the floor slab of the lowest floor of a building, and includes an upper pipe that protrudes above the floor slab and has an upper riser pipe connection part that connects an upper riser pipe that allows drainage water to flow in from the upper floor and at least one horizontal branch pipe connection part that connects a horizontal branch pipe above the floor slab, and a lower pipe that is connected below the upper pipe, and that can achieve a desired fire-resistant structure using a thermally expandable fire-resistant material (sometimes simply referred to as a thermally expandable material or a fire-resistant material), and in particular, to a drainage collector pipe that can achieve an optimal fire-spread prevention effect even if (A) the floor slab is a thin slab with rolling piping, or (B) there is an overlapping position between the upper pipe and the lower pipe (for example, the lower pipe has a receiving structure and the lower end of the upper pipe is connected to the upper end of the lower pipe).

Apartment buildings, office buildings, and the like are equipped with water supply and drainage facilities. The most widely known drainage system is a drainage piping structure that includes vertical pipes (standpipes, upper standpipes, lower standpipes) that run vertically through each floor of the building, horizontal pipes (horizontal branch pipes, branch pipes) installed on each floor, and drainage pipe joints (also called drainage collector pipes, drainage pipe joints, drainage collector joints) that connect these.

When installed in a building, this type of drainage pipe joint has a pipe body (main body, upper pipe) that is placed in the through hole of the floor slab, and the main body has an upper standpipe connection part at its upper end that can be connected to the upstream upper standpipe, a side branch pipe connection part at its side that can be connected to the side branch pipe, and a lower pipe connection part at its lower end that can be connected to a downstream piping member. Many of these drainage pipe joints have parts that change the flow of drainage inside the drainage pipe joint (for example, protrusions on the inner surface such as swirl vanes, straightening vanes, vane members, and deflection plates). In addition, drainage pipe joints formed from one or more injection-molded resin products are widely known.

In buildings equipped with drainage piping structures using such drainage piping joints, in the event of a fire or other incident on a floor below, in order to prevent flames, smoke, and toxic gases from leaking to upper floors through burned or melted parts of the drainage piping structure, heat-expandable fire-resistant material is separately attached to the outer periphery of the drainage piping joints or embedded in the middle layer of a three-layered piping material, so that in the event of a fire, the through holes in the floor slab are kept blocked by this heat-expandable fire-resistant material (forming a fire compartment structure).

As mentioned above, multi-story buildings such as apartment buildings and office buildings are provided with horizontal branch pipes that introduce wastewater from sanitary equipment in the rooms on each floor. The wastewater transported by the horizontal branch pipes is collected by a collecting joint installed on each floor. The wastewater on each floor collected by the collecting joint is transported from the upper floor to the lower floor by a vertical pipe. Then, the wastewater transported from the upper floor and the wastewater transported from the horizontal branch pipe on the lowest floor are collected at the collecting joint on the lowest floor, and the collected wastewater is drained to the sewer through a leg joint and a horizontal main pipe connected to the lower part of the collecting joint on the lowest floor (through a vertical pipe (straight pipe) described later). Regarding the connection between the collecting joint and the leg joint on the lowest floor (under the floor) of such a multi-story building, the lower part of the collecting joint is used as a receiving port, and the leg joint is connected through a vertical pipe (straight pipe) inserted into this receiving port, and the length of this vertical pipe (straight pipe) is often adjusted according to the height dimension of the underfloor space and the height arrangement of the horizontal main pipe. In addition, it is required to configure a fire compartment structure on this lowest floor as well. For example, Japanese Patent Publication No. 7059432 (Patent Document 1) discloses a low-cost collective joint that is installed in a through hole in a floor slab on the lowest floor of a building to realize a fire compartment structure and prevent drainage from leaking from the connection.

The collective joint disclosed in Patent Document 1 is a collective joint for connecting a standpipe and a leg joint, which is installed in a through hole of a floor slab provided on the lowest floor of a building, and which comprises a collective section having a standpipe connection section provided above, a horizontal pipe connection section provided on the side, and a straight pipe connection section provided below, and a straight pipe section connected to the straight pipe connection section, the collective section and the straight pipe section being formed of polyvinyl chloride resin, the straight pipe section being a cylinder having a socket section integrally molded at the upper end, and a pipe extending from the open end of the socket section to the lower end of the straight pipe section. The length to the end is 500 mm or less, a ring-shaped protrusion is provided between the receiving portion and the straight pipe portion, the protrusion is provided on the inside of the straight pipe portion corresponding to a recess provided on the outer surface of the straight pipe portion, a fire-resistant material is provided at a position overlapping with the protrusion in the pipe axis direction, the protrusion and the fire-resistant material are located in the through hole, the inner diameter of the cylinder is larger than the inner diameter of the vertical pipe and smaller than the inner diameter of the straight pipe connection portion, and the straight pipe connection portion is inserted into the receiving portion and bonded to the receiving portion to connect to the straight pipe portion.

According to the collective joint disclosed in Patent Document 1, in terms of forming a fire compartment structure, the fireproof material provided at a position overlapping the annular protrusion in the pipe axial direction expands thermally in the event of a fire in the building, deforming the straight pipe section of the collective joint and blocking the piping structure. This serves to prevent smoke from the inside of the piping structure in the event of a fire from moving to upper floors.

In addition, JP 2017-014762 A (Patent Document 2) discloses a drain pipe joint that, for a drain pipe that penetrates the floor slab of a building, makes it easier to simultaneously reduce the sound of drainage running through the floor slab while suppressing an increase in weight, and prevent fire and smoke from spreading to upper and lower floors through the drain pipe joint in the event of a fire.

The drain pipe joint disclosed in Patent Document 2 is a drain pipe joint that is piped by penetrating the floor slab of a building, and includes a joint body to which a drain pipe is connected, and a first covering material that covers the outer surface of the portion of the joint body that penetrates the floor slab. The joint body is made of a thermoplastic resin, and the first covering material is integrally provided with, 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, and a waterproof and sound insulating skin layer, and a thermal expansion material provided around the circumference at least at one point in the axial direction.

According to the drain pipe joint disclosed in Patent Document 2, in the event of a fire, the thermal expansion material, whose outward expansion is restricted within the floor slab, expands inward in the pipe so as to tighten the joint body, which is made of a thermoplastic resin softened by heat, and blocks the pipe, preventing the spread of fire and smoke to upper and lower floors through the drain pipe joint in the event of a fire.

Patent No. 7059432 JP 2017-014762 A

However, in the collective joint disclosed in Patent Document 1, when a collective joint with fireproof material in the position shown in Figures 2 to 4 of Patent Document 1 is installed with rolling piping, if the floor slab is thin (for example, the floor slab is 75 mm thick), the fireproof material will be below the floor slab (the entire length of the fireproof material in the axial direction of the pipe will not be buried in the floor slab), making it difficult to exhibit fireproof performance. Note that the collective joint disclosed in Patent Document 1 is provided with a soundproofing cover on the outer periphery of the fireproof material, but it is only described that a structure with a sound-absorbing material provided on the inner layer and a soundproofing material provided on the outer layer is preferable, and even if such a soundproofing cover is provided on the outer periphery of the fireproof material, the fireproof material will be below the floor slab, making it difficult to exhibit fireproof performance.

In the drain pipe joint disclosed in Patent Document 2, the thermally expandable fire-resistant material is provided in the overlapping portion between the upper part (upper pipe) and the lower part (lower pipe) as shown in FIG. 2 of Patent Document 2, or in the overlapping portion between the lower part and the interior part fitted into the lower part as shown in FIG. 8 of Patent Document 2. As a result, the thickness of the peripheral wall increases in the overlapping portion between the upper part and the lower part of the plastic joint and in the overlapping portion between the lower part and the interior part, making it difficult for the thick peripheral wall to melt in the event of a fire, reducing the blocking performance, or requiring an increased amount of thermally expandable material to achieve sufficient blocking performance.

The present invention was developed in consideration of the above-mentioned problems, and its purpose is to provide a resinous drainage collecting pipe that is installed by penetrating the floor slab of the lowest floor of a building, and that can provide an optimal fire spread prevention effect even if (A) the floor slab is a thin slab with a rolling piping, or (B) there is an overlapping position between the upper pipe and the lower pipe (for example, the lower pipe has a receiving structure and the lower end of the upper pipe is connected to the upper end of the lower pipe).

To achieve the above objective, the drainage manifold for the lowest floor of the present invention incorporates the following technical measures:

The drainage collecting pipe of the present invention is a resin drainage collecting pipe that is placed in a through hole in the floor slab of the lowest floor of a building, the drainage collecting pipe includes an upper pipe that protrudes above the floor slab and a lower pipe that is connected below the upper pipe, the lower pipe has a reduced diameter section, and one or more extension pipes, with or without a horizontal branch pipe connection section, may be connected between the upper pipe and the lower pipe, the upper pipe includes an upper riser pipe connection section that connects an upper riser pipe that flows wastewater in from the upper floor and at least one horizontal branch pipe connection section that connects a horizontal branch pipe above the floor slab, the lower pipe includes a joint connection section that connects a leg joint that flows wastewater out to a horizontal main pipe directly or via another pipe, and includes a thermally expandable fireproof material above the upper end of the lower pipe and below the upper end of the outer layer member that covers the drainage collecting pipe including the lower pipe, and the thermally expandable fireproof material includes only the upper pipe or only the extension pipe on the inner periphery of the thermally expandable fireproof material.

Preferably, the inner circumference of the thermally expandable fireproof material is configured to have only a straight pipe portion that does not have internal protrusions.

More preferably, a water-stopping member that seals the outer layer member against the outer periphery of the upper pipe and has water-stopping properties is provided at the upper end of the outer layer member, so that the outer layer member covers the drainage collecting pipe.

More preferably, the upper end of the thermally expandable fireproof material can be configured to be located below the upper surface of the floor slab.

More preferably, the lower end of the heat-expandable fire-resistant material is located above the underside of the floor slab, or if the lower end of the heat-expandable fire-resistant material is not located above the underside of the floor slab, the outer layer member can be configured to have fire resistance.

More preferably, the distance between the upper end of the lower pipe and the lower surface of the lateral branch pipe can be configured to be 30 mm or more and 500 mm or less.

More preferably, the distance between the upper end of the lower tube and the upper surface of the floor slab can be configured to be 5 mm or more and 400 mm or less.

More preferably, the distance between the lower end of the thermally expandable fireproof material and the start position of the reduced diameter portion of the lower tube can be configured to be 5 mm or more and 200 mm or less.

More preferably, the height dimension of the thermally expandable fireproof material can be configured to be 8 mm or more and 50 mm or less.

More preferably, the volume of the thermally expandable fireproof material is set to be 30 mm ³ or more and 200 mm ³ or less.

More preferably, the lower tube may be further configured to have a heat-expandable fire-resistant tape on the outer periphery of the lower tube at the fitting portion between the lower tube and the upper tube or the extension tube.

According to the present invention, it is possible to provide a drainage collector pipe for the lowest floor that is made of resin and is installed by penetrating the floor slab of the lowest floor of a building, and that can provide optimal fire spread prevention effects even if (A) the floor slab is a thin slab with rolling piping, or (B) there is an overlapping position between the upper pipe and the lower pipe (for example, the lower pipe has a receiving structure and the lower end of the upper pipe is connected to the upper end of the lower pipe).

(A) is a top view of a standard drainage collecting pipe 1000 (standard upper pipe 1100 + standard lower pipe 1500) according to an embodiment of the present invention, and (B) is a cross-sectional view thereof taken along 1B-1B. 1B is an enlarged view of region 2 shown in FIG. 1B for explaining outer layer member 1700. FIG. This is a cross-sectional view showing a branch extension drainage collecting pipe 1001 in which the standard upper pipe 1100 in Figure 1 (B) is replaced with a long branch extension upper pipe 1101 below the branch. (A) Cross-sectional views of a body extension drainage collecting pipe 1002 using extension pipes 1102 and 1103 in Figure 1 (B), (B) a two-stage drainage collecting pipe 1003 using a branched extension pipe 1104 in Figure 1 (B), and (C) a two-stage body extension drainage collecting pipe 1004 in Figure 4 (A) in which extension pipe 1103 is replaced with a branched extension pipe 1104. This is a cross-sectional view of the standard drainage manifold 1000 to which a fire-resistant material (fire-resistant sheet) 1713 has been added in FIG. 6A is a top view of a super-high rise drainage collecting pipe 1040 (super-high rise upper pipe 1140 + standard lower pipe 1500) according to an embodiment of the present invention, and FIG. 6B is a cross-sectional view thereof taken along line 6B-6B. FIG. 7 is an enlarged view of region 7 shown in FIG. 6(B) inverted from left to right for explaining the outer layer member 1701. FIG. 6B is a cross-sectional view of a super high-rise drainage collecting pipe 1040 in which a thermally expandable fireproof material 1712 is disposed directly below a rubber ring 1900. (A) Top view of the lowest floor drainage manifold 1060 (standard upper pipe 1100 + lowest floor lower pipe 1560) in accordance with an embodiment of the present invention, and (B) a cross-sectional view thereof taken along line 9B-9B. 9B is an enlarged view of region 10 shown in FIG. 9B for explaining outer layer member 1703. FIG. FIG. 2 is a construction diagram of the standard drainage collecting pipe 1000 shown in FIG. 1 in a rolling piping configuration. FIG. 2 is a construction diagram of the standard drainage collecting pipe 1000 shown in FIG. 1 in a floating piping configuration. FIG. 5 is a diagram showing the construction of the extendable drainage collecting pipe 1002 shown in FIG. 4(A) in a rolling manner. This is a construction diagram of the case where an extended bottom floor drainage collector pipe 1061 using an extension pipe 1103 is rolled and piping is performed on the bottom floor drainage collector pipe 1060 shown in Figure 9 (B). FIGS. 1A to 15C are a top view, a side view, and a 15C-15C cross-sectional view, respectively, of a drainage collecting pipe 2000 (standard upper pipe 2100 + standard lower pipe 1500) including a horizontal branch pipe receiving port 2122 that is externally fitted and attached (connected) to a horizontal branch pipe connection portion 1120 relating to a first modified example of an embodiment of the present invention. FIG. 11 is a diagram (part 1) showing another application example of the first modified example. FIG. 11 is a diagram (part 2) showing another application example of the first modified example. (A) a top view of a drainage manifold 3000 (standard upper pipe 3100 + standard lower pipe 1500) provided with small protrusions relating to a second modified example of an embodiment of the present invention, (B) a cross-sectional view taken along 18B-18B thereof, (C) a cross-sectional view taken along 18C-18C thereof, (D) an enlarged view of the region 18D thereof, (E) an enlarged view of the region 18E thereof, and (F) an enlarged view of the region 18F thereof. 13A and 13B are diagrams showing other shapes of small protrusions in the second modified example. FIG. 11 is a diagram (part 1) showing another application example of the second modified example. FIG. 13 is a diagram (part 2) showing another application example of the second modified example.

In the following, the drainage collecting pipe according to the embodiment of the present invention will be described in detail with reference to Figs. 1 to 14. In the following description, the outer peripheral surface, the outer surface, and the outside, the outer layer side, the outer peripheral side, and the outside, the inner layer side, the inner peripheral side, and the inside, and the thermally expandable fireproof material, the fireproof material, and the thermally expandable material may not be clearly distinguished from each other. In addition, in the cross-sectional view, different members may not be clearly distinguished from each other depending on the type of hatching. In addition, in order to facilitate understanding of the present invention, the direction of the horizontal branch pipe may be specified using the hour hands of a clock as 0 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock in the top view or bottom view. In addition, the code (consisting of a number + (if necessary) an alphabet) attached to the dashed line with the arrow in the figure indicates the figure number with the number and the branch number (A, B, C, etc.) in the figure, and the cross-sectional view is shown in the figure specified by the code. In addition, the reference numbers (consisting of numbers and (if necessary) letters) attached to dotted lines in the drawings indicate the drawing number with the numbers and the alphabets with the sub-numbers (A, B, C, etc.) in the drawings, and the drawings identified by the reference numbers show enlarged views (excluding the dotted lines marked with reference number 1410S, which includes the letter S indicating a space).
Unless otherwise specified, the drainage collecting pipe according to the present embodiment described below is not limited to any of super high-rise, lowest floor, and middle floor (meaning neither super high-rise nor lowest floor, and may be referred to as a standard drainage collecting pipe). In addition, when simply referring to a drainage collecting pipe, upper pipe, and lower pipe (without reference numbers), it means a drainage collecting pipe, upper pipe, and lower pipe that are not limited to any of middle floor, super high-rise, and lowest floor.

<Combination of upper and lower pipes in drainage manifold>
The drainage collector pipe of this embodiment will be described with reference to Figures 1 to 5 which show a standard drainage collector pipe 1000, Figures 6 to 8 which show a super high-rise drainage collector pipe 1040, Figures 9 to 10 which show a bottom floor drainage collector pipe 1060, and Figures 11 to 14 which are construction drawings showing the drainage collector pipes after installation.

First, the combination of the drainage collecting pipes according to this embodiment will be described. The standard drainage collecting pipe 1000 shown in these figures (particularly FIG. 1) is configured by connecting a standard upper pipe 1100 without a deflection plate 1200 and a standard lower pipe 1500 with a swirl vane 1600 connected below the standard upper pipe 1100. The super-high rise drainage collecting pipe 1040 shown in these figures (particularly FIG. 6) is configured by connecting an super-high rise upper pipe 1140 with a deflection plate 1200 and a standard lower pipe 1500 with a swirl vane 1600 connected below the super-high rise upper pipe 1140. The lowest floor drainage collecting pipe 1060 shown in these figures (particularly FIG. 9) is configured by connecting a standard upper pipe 1100 without a deflection plate 1200 and a lowest floor lower pipe 1560 with a reduced diameter portion 1660 without a swirl vane 1600 connected below the standard upper pipe 1100. However, the present invention is not limited to such combinations, and may include, for example, an extension tube or an extension tube with branches, as described below.

These three types of drainage collector pipes (standard drainage collector pipe 1000, super high-rise drainage collector pipe 1040, and bottom floor drainage collector pipe 1060) will be described. All three types of drainage collector pipes are resin drainage collector pipes that are placed in the through holes of the floor slab S of the building. As shown in FIG. 1, the standard drainage collector pipe 1000 among these drainage collector pipes includes a standard upper pipe 1100 that protrudes above the floor slab S and a standard lower pipe 1500 that is connected (adhesively joined) to the lower part of the standard upper pipe 1100, and the standard lower pipe 1500 has a swirl vane 1600. One or more extension pipes, which may or may not have a side branch pipe connection part 1120, may be connected between the standard upper pipe 1100 and the standard lower pipe 1500 (even if simply described as an extension pipe below, the extension pipe may or may not have a side branch pipe connection part). The standard upper pipe 1100 includes an upper riser pipe connection part 1110 for connecting an upper riser pipe through which wastewater flows in from the upper floor, and at least one horizontal branch pipe connection part 1120 for connecting a horizontal branch pipe above the floor slab S. The standard lower pipe 1500 includes a lower riser pipe connection part 1510 for connecting a lower riser pipe through which wastewater flows out to the lower floor. The lower riser pipe connection part 1510 may be provided separately from the standard lower pipe 1500 as shown in FIG. 1, or may be provided integrally as in the standard lower pipe 1500 used in the super high-rise drainage collecting pipe 1040 shown in FIG. 6 (since this is the only difference, the reference numeral (reference numeral 1500 of the standard lower pipe 1500 here) is not distinguished). In addition, the drainage collector pipe 1040 for super high-rise buildings is different from the standard drainage collector pipe 1000 described above in that, as shown in FIG. 6, the standard upper pipe 1100 protruding above the floor slab S has been changed to a super high-rise upper pipe 1140 equipped with a deflector plate 1200. In addition, the drainage collector pipe 1060 for the lowest floor is different from the standard drainage collector pipe 1000 described above in that, as shown in FIG. 9, the standard lower pipe 1500 connected below the standard upper pipe 1100 has been changed to a lowest floor lower pipe 1560 equipped with a reduced diameter portion 1660 instead of a swirl vane 1600. This lower pipe 1560 for the lowest floor includes a joint connection portion 1570 that connects the leg joint that drains the drainage to the horizontal main pipe directly or via another pipe.

As an example, the upper riser pipe connection section 1110 is provided with a riser pipe receiving port 1112 and a rubber ring 1114, through which the upper riser pipe and the drainage collecting pipe are connected, and the side branch pipe connection section 1120 is provided with a side branch pipe receiving port 1122 and a rubber ring 1124, through which the side branch pipe and the drainage collecting pipe are connected.

In the drainage collecting pipe according to this embodiment, in the top view of the drainage collecting pipe as shown in Figs. 1, 6 and 9, side branch pipe connection parts 1120 are provided at 0 o'clock, 3 o'clock and 6 o'clock, and no side branch pipe connection part 1120 is provided at 9 o'clock, but at least one side branch pipe connection part 1120 is sufficient. Also, like this drainage collecting pipe, side branch pipe connection parts 1120 may be provided at three places other than 9 o'clock, and the side branch pipe connection part 1120 on the side where the side branch pipe is not connected may be blocked with a plug (this plug may be blocked via the side branch pipe receiving port 1122 and the rubber ring 1124).

<Upper tube>
The upper pipe constituting the drainage collecting pipe in this embodiment may be provided with an eave 1240 for preventing drainage from the upper floor from flowing back into the side branch pipe, or a backflow prevention rib for preventing drainage flowing into the drainage collecting pipe from the side branch pipe from flowing back into the adjacent side branch pipe, as an optional configuration for preventing backflow of drainage. More specifically, the backflow prevention rib is provided with a first backflow prevention rib 1310 between the side branch pipe connection part 1120 at the 0 o'clock position and the side branch pipe connection part 1120 at the 3 o'clock position, a second backflow prevention rib 1320 between the side branch pipe connection part 1120 at the 3 o'clock position and the side branch pipe connection part 1120 at the 6 o'clock position, a third backflow prevention rib 1330 between the side branch pipe connection part 1120 at the 6 o'clock position and the side branch pipe connection part 1120 at the 9 o'clock position, and a fourth backflow prevention rib 1340 between the side branch pipe connection part 1120 at the 9 o'clock position and the side branch pipe connection part 1120 at the 0 o'clock position. These first backflow prevention rib 1310 and second backflow prevention rib 1320 are provided so as to be positioned on the inner circumference (inner wall) of the standard upper pipe 1100 of the standard drainage collecting pipe 1000 and to have a shape parallel to the axis.

Here, the super-high rise upper pipe 1140 constituting the super-high rise drainage collecting pipe 1040 is provided with a deflection plate 1200 protruding on the inner circumference to change the flow of drainage in a direction not provided with the horizontal branch pipe connection part 1120 (here, the 9 o'clock direction). Also, in this super-high rise drainage collecting pipe 1040, the standard lower pipe 1500 connected to the super-high rise upper pipe 1140 is provided with a swirling vane 1600 protruding on the inner circumference to change the flow of drainage. In this way, the super-high rise drainage collecting pipe 1040 is provided with these deflection plates 1200 and swirling vanes 1600. By positioning the upper end, which is the starting point of this deflection plate 1200, below the pipe axis of the horizontal branch pipe connection part 1120, it is possible to prevent the wastewater to which a swirling component has been added by the deflection plate 1200 from flowing back into the horizontal branch pipe, and by positioning the lower end, which is the end point of the deflection plate 1200, above the upper end 1600U of the swirl vane 1600, the swirling flow induced by the deflection plate 1200 is handed over to the swirl vane 1600, and the swirl component of the swirl flow is further increased by the swirl vane 1600, which is an advantageous effect.

In this case, the third backflow prevention rib 1330 described above is located on the end side (lower end side) of the deflection plate 1200, and prevents the splash-back drainage from the deflection plate 1200 from flowing back into the horizontal branch pipe (instead of/in addition to preventing backflow between the horizontal branch pipes). The fourth backflow prevention rib 1340 described above is located on the start side (upper end side) of the deflection plate 1200, and prevents the splash-back drainage from the deflection plate 1200 from flowing back into the horizontal branch pipe (instead of/in addition to preventing backflow between the horizontal branch pipes).

Here, it is preferable that the height position of the lower end of the end-side backflow prevention rib (third backflow prevention rib 1330) is lower than the pipe bottom of the horizontal branch pipe connection part 1120 (below the pipe bottom of the horizontal branch pipe connection part 1120 does not exclude the case where it is lower than the inner diameter of the horizontal branch pipe), and higher than the lower end of the deflection plate 1200. In this way, the height position of the lower end of the end-side backflow prevention rib (third backflow prevention rib 1330) is lower than the pipe bottom of the horizontal branch pipe connection part 1120, which can prevent backflow from the deflection plate 1200 to the horizontal branch pipe, and the height position of the lower end of the end-side backflow prevention rib (third backflow prevention rib 1330) is higher than the lower end of the deflection plate, which can form a space, making it easier to form a swirling flow.

Furthermore, the height position of the lower end of this start-point side backflow prevention rib (fourth backflow prevention rib 1340) approximately coincides with the upper end (starting point) of the deflection plate 1200. Since the lower end of the start-point side backflow prevention rib (fourth backflow prevention rib 1340) extends to a position approximately coinciding with the height position of the upper end (starting point) of the deflection plate 1200 in this manner, it is possible to prevent backflow from the deflection plate 1200 to the horizontal branch pipe, and it is preferable in that a swirling flow is easily formed.

Thus, in the super-high rise upper pipe 1140, the backflow prevention ribs having a shape parallel to the axis include a first backflow prevention rib 1310 and a second backflow prevention rib 1320 for preventing wastewater flowing from the horizontal branch pipe into the super-high rise drainage collecting pipe 1040 from flowing back into the adjacent horizontal branch pipe, and an end-side backflow prevention rib (third backflow prevention rib 1330) and a start-side backflow prevention rib (fourth backflow prevention rib 1340) for preventing wastewater splashing from the deflection plate 1200 from flowing back into the horizontal branch pipe. A standard lower pipe 1500 is connected below this super-high rise upper pipe 1140 to form the super-high rise drainage collecting pipe 1040 of this embodiment. As described above, the first backflow prevention rib 1310 and the second backflow prevention rib 1320 are provided on the inner circumference (inner wall) of the super-high rise upper pipe 1140 of the super-high rise drainage collecting pipe 1040, but at least the end-point side backflow prevention rib (third backflow prevention rib 1330) is provided to the side of the deflection plate 1200 and at a position separated from the inner circumference (inner wall) of the super-high rise upper pipe 1140. In addition, the shapes of the four backflow prevention ribs are similar in that they have a shape parallel to the axis, but other shapes may not be the same.

On the other hand, in the standard upper pipe 1100 constituting the standard drainage collecting pipe 1000 and the lowest floor drainage collecting pipe 1060, the backflow prevention ribs with a shape parallel to the axis are the first backflow prevention rib 1310, the second backflow prevention rib 1320, the third backflow prevention rib 1330, and the fourth backflow prevention rib 1340, which are intended to prevent the drainage that flows from the horizontal branch pipe into the standard drainage collecting pipe 1000 or the lowest floor drainage collecting pipe 1060 from flowing back into the adjacent horizontal branch pipe, and although not limited to these, all of the backflow prevention ribs are provided on the inner circumference (inner wall) of the standard upper pipe 1100.

As described above, the super-high rise upper pipe 1140 of the super-high rise drainage collecting pipe 1040 is provided with a deflection plate 1200 that protrudes on the inner circumference to change the flow of drainage in a direction that does not include the horizontal branch pipe connection part 1120 (here, the 9 o'clock direction). And, as shown in FIG. 6, the super-high rise drainage collecting pipe 1040 has a recess for forming the deflection plate 1200 on the outer circumferential surface of the super-high rise upper pipe 1140 provided with this deflection plate 1200.

Here, although not limited thereto, in the super-high rise drainage collecting pipe 1040, the vertical pipe axis of the super-high rise upper pipe 1140 and the vertical pipe axis of the standard lower pipe 1500 coincide to form the axis of the super-high rise drainage collecting pipe 1040, and the recess can be provided with a rib 1400 including a surface perpendicular to this axis. Here, the recess is a required configuration, but this rib 1400 is an optional configuration, and it is also possible to only provide a recess for forming the deflection plate 1200 on the outer surface of the super-high rise upper pipe 1140 without providing the rib 1400. As will be described in detail later, the rib 1400 includes multiple (here, four) body-part uniform diameter ribs 1410 and the lowest (one) rubber ring positioning rib 1412 whose protruding length is different from these body-part uniform diameter ribs 1410. The outer diameter of the body equal diameter rib 1410 is approximately the same as the outer diameter of the body (= body diameter), where the body is the straight pipe section directly below the horizontal branch pipe connection section 1120 in the super high rise upper pipe 1140, and the body diameter refers to the outer diameter of this section.

Here, this recess (with or without ribs) can be made to have the function of reducing vibration or noise caused by wastewater hitting the protrusion (deflection plate 1200). Furthermore, the effect of reducing vibration or noise caused by wastewater hitting the protrusion (deflection plate 1200) can be achieved by air remaining in the recess (with or without ribs) (if ribs 1400 are provided, air remaining in the space 1410S formed between the ribs 1400).

Here, the effect of reducing vibration or noise caused by wastewater hitting the protrusion (deflection plate 1200) can be achieved by a member covering the super high-rise drainage collecting pipe 1040 including the recess (with or without ribs) or a member fitted into the recess (with or without ribs). Also, although not limited thereto, the effect of reducing vibration or noise caused by wastewater hitting the deflection plate 1200 can be achieved by providing a cover material (more preferably a cover material having vibration damping and/or sound insulation performance) that seals air stagnating in a recess without ribs, or a cover material (more preferably a cover material having vibration damping and/or sound insulation performance) that seals air stagnating in the space 1410S formed between the ribs 1400. In addition, by providing a material with vibration-damping and/or sound-proofing properties in recesses where there are no ribs, or by providing a material with vibration-damping and/or sound-proofing properties in the spaces 1410S formed between the ribs 1400, it is possible to achieve the effect of reducing the vibrations or noise generated when wastewater hits the deflector plate 1200.

In addition, although not limited thereto, when the recess has a rib 1400, a plurality of ribs 1400 (here, five ribs) are provided between the upper surface and the lower surface of the horizontal branch pipe connection part 1120, and the outer diameter of the lowest rib (rubber ring positioning rib 1412) can be made different from the outer diameter of the normal rib (body equal diameter rib 1410) other than the lowest rib. In this case, it is preferable that the outer diameter of the normal rib (body equal diameter rib 1410) is approximately the same as the outer diameter (=body diameter) of the body below the horizontal branch pipe connection part 1120 in the super high-rise upper pipe 1140. In this way, the outer diameter of the multiple (here, four) normal ribs (body equal diameter ribs 1410) is approximately the same as the outer diameter (= body diameter) of the body part below the horizontal branch pipe connection part 1120 in the super high rise upper pipe 1140. This is preferable because when covering the upper pipe cover with an Ω-shaped hole or the like having a maximum diameter that is approximately the same as or slightly larger than the outer diameter of the horizontal branch pipe connection part 1120 in three directions (three directions other than the 9 o'clock direction), the presence of the normal ribs (body equal diameter ribs 1410) improves the workability of wrapping the upper pipe cover around the super high rise upper pipe 1140 because the outer diameter in the 9 o'clock direction is the same as in the other three directions.

<Lower pipe>
While the standard lower pipe 1500 among the lower pipes constituting the drainage collecting pipe according to this embodiment is equipped with the above-mentioned swirl vane 1600, the lower pipe 1560 for the lowest floor is equipped with a reduced diameter section 1660 without the swirl vane 1600. The reduced diameter section 1660 slows down the inflow speed of drainage water from the joint connection section 1570 to the leg joint connected directly or via another pipe. The inner diameter of this reduced diameter section 1660 is smaller than the inner diameter of the standpipe connected to the drainage collecting pipe 1060 for the lowest floor.

<Outer layer material>
Here, the outer layer members (outer layer covers) wrapped around these drainage collecting pipes will be described with reference to Figures 2, 7, and 10. The standard drainage collecting pipe 1000 is provided with an outer layer member 1700 shown in Figure 2, the super high-rise drainage collecting pipe 1040 is provided with an outer layer member 1701 shown in Figure 7, and the lowest floor drainage collecting pipe 1060 is provided with an outer layer member 1703 shown in Figure 10. Members that have different shapes but the same functions are given the same reference numerals in these three figures, and the members to which the same reference numerals are given will not be described repeatedly.

These outer layer members 1700, 1701, and 1703 correspond to the outer layer member 700 disclosed in, for example, JP 2021-167557 A filed by the applicant of the present application (however, the shape and position of the thermally expandable fire-resistant material are different). When this drainage collector pipe burns, the heat causes the thermally expandable fire-resistant material 1712 to expand radially inward, causing the resin drainage collector pipe to crush its hollow portion and block the drainage collector pipe. As a result, the drainage piping structure using these drainage collector pipes is able to block the pipeline in the event of a fire to prevent the flow of flames, smoke, etc.

As shown in Figures 2, 7 and 10, these outer layer members have a three-layer structure, and are provided on the outer circumferential surface of the upper and/or lower pipes of the drainage collecting pipe in the following order from the outer surface of the drainage collecting pipe: vibration-damping material 1714 (or heat-expandable fire-resistant material 1712), vibration insulator 1720 made of fire-resistant inorganic fiber, and sound-insulating cover 1730. The innermost layer 1710 in this three-layer structure is either heat-expandable fire-resistant material 1712 or vibration-damping material 1714.

The thermally expandable fire-resistant material 1712 located in the innermost layer is formed from, for example, a resin composition containing a resin component mainly composed of butyl rubber, a phosphorus compound, neutralized thermally expandable graphite, a water-containing inorganic substance, and a metal carbonate, or a resin composition containing an epoxy resin, a phosphorus compound, neutralized thermally expandable graphite, and an inorganic filler. The vibration-damping material 1714 located in the innermost layer is formed from a butyl-based (butyl rubber, etc.) or asphalt-based (rubber asphalt, modified asphalt, etc.) material. The sound-insulating cover 1730 located in the outermost layer is formed from a rubber-based (EPDM (ethylene propylene diene rubber) etc.), elastomer-based, or resin-based material (it may be made of not only soft materials such as rubber, but also hard PVC), and the vibration insulator 1720 located in the middle layer is made of an aggregate (porous material) of inorganic fibers with fire resistance.

Here, examples of inorganic fibers include artificial mineral fibers, such as glass wool, rock wool, or ceramic fibers, which are preferred for their high vibration insulation and sound absorption properties. The vibrations (e.g., noises and vibrations generated by hitting the deflector 1200 or the swirl vane 1600) caused by the wastewater flowing down the upper or lower pipe of the wastewater collecting pipe are suppressed by the vibration damping material 1714, and the vibrations are further blocked (and/or noises caused by the vibrations are absorbed) by the vibration insulator 1720 made of this rock wool, etc., and the transmission of noises caused by the vibrations is further blocked by the sound insulation cover 1730 made of a rubber cover made of EPDM, etc. Here, rock wool is a general term for materials made mainly from natural rocks 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 have fire resistance and flame retardancy.

In the following, a case where butyl rubber is used as the vibration damping material 1714, rock wool is used as the vibration insulator 1720, and an EPDM rubber cover is used as the sound insulation cover 1730 will be described, but these materials are merely examples. In addition, the outer layer member 1700 (innermost layer: heat expandable fireproof material 1712 or vibration damping material 1714, middle layer: vibration insulator 1720, outermost layer: sound insulation cover 1730) is preferably in contact with the outer surface of the drainage collecting pipe via a ring-shaped elastic material (rubber ring 1900) (made of EPDM, etc.) that is elastic and corresponds to the outer diameter of the drainage collecting pipe (more specifically, the outer diameter of the body, which is the straight pipe part below the horizontal branch pipe connection part 1120 of the upper pipe) in order to ensure water stopping. In order to ensure water stopping, a packing structure can be adopted instead of the ring elastic material (rubber ring 1900). Furthermore, when an outer layer member is adhesively bonded to the outer surface of the drainage collecting pipe via the rubber ring 1900, it is also preferable to use, for example, a heat shrink tube 1910 to prevent the rubber ring 1900 and the outer layer member from shifting from the drainage collecting pipe until a period of time has elapsed to ensure adhesive bonding performance. In order to improve the efficiency of the assembly process, the sound insulating cover 1730 of the outer layer member and the rubber ring 1900 are separate members (even if they are made of the same material).

<Thermal expandable fireproof material>
The innermost layer 1710 of the outer layer member having the above-mentioned three-layer structure is provided with a thermally expandable fire-resistant material 1712. The feature of the present invention is the location of this thermally expandable fire-resistant material. This will be described in detail below. The form of the thermally expandable fire-resistant material 1712 is not limited to any of fire-resistant putty, fire-resistant sheet, fire-resistant tape, etc.

As shown in Figures 1 and 2, the height position of this thermally expandable fireproof material 1712 is preferably above the upper end (upper end of the lower pipe socket 1502) of the standard lower pipe 1500 constituting the standard drainage manifold 1000 and below the upper end of the outer layer member 1700 (upper end of the sound insulation cover 1730); as shown in Figures 6 and 7, it is preferably above the upper end (upper end of the lower pipe socket 1502) of the standard lower pipe 1500 constituting the super-high rise drainage manifold 1040 and below the upper end (upper end of the sound insulation cover 1730) of the outer layer member 1701; and as shown in Figures 9 and 10, it is preferably above the upper end (upper end of the lower pipe socket 1502) of the lowest floor lower pipe 1560 constituting the lowest floor drainage manifold 1060 and below the upper end of the outer layer member 1703 (upper end of the sound insulation cover 1730). And, on the inner circumference of this thermally expandable fireproof material 1712, there is only the upper pipe or only the extension pipe (for example, it does not have an internal protrusion that protrudes onto the inner circumference surface of the drainage manifold, and it does not have a double structure with a receiving port, etc.).

It is preferable that the inner circumference of the thermally expandable fire-resistant material 1712 only has straight pipe sections that do not have internal protrusions (e.g., deflection plates or swirl vanes). However, in order to easily understand the characteristic configuration of the present invention, Figure 8 described later uses a diagram in which a deflection plate 1200 is present on the inner circumference of the thermally expandable fire-resistant material 1712.

It is preferable that a water-stopping member (the rubber ring 1900 described above) that seals the outer layer member against the outer periphery of the upper pipe and provides water-stopping properties is provided at the upper end of the outer layer member, and that the outer layer member covers the drainage collecting pipe.

It is preferable that the upper end of the thermally expandable fireproof material 1712 be located below the upper surface of the floor slab S as shown in Figures 12 to 14.

The lower end of the thermally expandable fire-resistant material 1712 is located above the lower surface of the floor slab S as shown in Figures 11 to 14, or if the lower end of the thermally expandable fire-resistant material 1712 is not located above the lower surface of the floor slab S, the outer layer member has fire resistance (vibration insulator 1720 formed from fire-resistant inorganic fibers forming the middle layer of the outer layer member).

By providing the thermally expandable fireproof material 1712 in such a position, (2) the vertical position of the fireproof material is not determined by the vertical position of the protrusions on the inner surface of the swirl vanes, etc., (3) the deterioration of the blocking performance due to the presence of protrusions on the inner surface of the swirl vanes, etc. is suppressed, and (4) even if the upper pipe and the lower pipe overlap (for example, the lower pipe has a receiving structure and the lower end of the upper pipe is connected to the upper end of the lower pipe), an optimal fire spread prevention effect can be achieved.

By providing the heat-expandable fire-resistant material 1712 at the above-mentioned position, an optimal fire spread prevention effect can be achieved with a smaller amount of fire-resistant material than when provided at other positions. More specifically, the height dimension of the heat-expandable fire-resistant material 1712 is 8 mm or more and 50 mm or less, and the volume of the heat-expandable fire-resistant material 1712 is 30 ^mm3 or more and ²⁰⁰ mm3 or less.

Furthermore, specific dimensions in the height direction will be explained. The distance L(1) (indicating the length below the branch) between the upper end of the lower pipe (the upper end of the lower pipe receiving port 1502) and the lower surface of the horizontal branch pipe is preferably 30 mm or more and 500 mm or less. Since the absolute value between the upper end of the lower pipe (the upper end of the lower pipe socket 1502) and the lower surface of the horizontal branch pipe connection part 1120 is very small (relative to the distance L(1)), L(1) in the present invention may be the distance L between the upper end of the lower pipe (the upper end of the lower pipe socket 1502) and the lower surface of the horizontal branch pipe connection part 1120. Defining L(1) in this way is preferable because it allows the L(1) of a single drainage collecting pipe (in the sense that a horizontal branch pipe is not connected) having one or more horizontal branch pipe connections for connecting a horizontal branch pipe to an upper pipe to be limited regardless of the type of horizontal branch pipe. In addition, the distance L(2) between the lower end of the thermally expandable fireproof material 1712 and the upper end of the swirl vane 1600 of the standard lower pipe 1500 is preferably 5 mm or more and 200 mm or less, and the distance L(2) between the lower end of the thermally expandable fireproof material 1712 and the starting position of the reduced diameter part 1660 of the lower pipe for the lowest floor 1560 is preferably 5 mm or more and 200 mm or less.

It can also be said that the distance L(1) (indicating the length below the branch) between the upper end of the lower pipe (the upper end of the lower pipe receiving port 1502) and the lower surface of the horizontal branch pipe is preferably 30 mm or more and 150 mm or less when an extension pipe is not provided, and 150 mm or more and 500 mm or less when an extension pipe is provided.

More specifically, if no extension tube is provided,
As shown in FIG. 1, in the standard drainage manifold 1000, L(1) = 45 mm (the value closest to the lower limit of L(1) of 30 mm), L(2) = 36 mm,
As shown in FIG. 3, in the case of the branch-under extension drainage collecting pipe 1001 in which the standard upper pipe 1100 of the standard drainage collecting pipe 1000 is replaced with a long branch-under extension upper pipe 1101, L(1) = 135 mm (the value closest to the upper limit of L(1) of 150 mm when no extension pipe is provided), L(2) = 36 mm,
As shown in FIG. 6, in the super high-rise drainage collecting pipe 1040, L(1) = 135 mm, L(2) = 36 mm,
As shown in FIG. 9, in the lowest floor drainage collecting pipe 1060, L(1) = 45 mm, L(2) = 36 mm,
It is.

8 shows a cross-sectional view of the drainage collecting pipe 1040 for super-high rise buildings in which the thermally expandable fireproof material 1712 is disposed directly under the rubber ring 1900 in FIG. 6B. In the case shown in FIG. 8, L(2)=126 mm. In this case, the deflection plate 1200 and the thermally expandable fireproof material 1712 overlap in the height direction, and the presence of the deflection plate 1200 (one example of a protrusion on the inner circumferential surface) reduces the blocking performance, so it is preferable to avoid the deflection plate 1200 and the thermally expandable fireproof material 1712 overlapping in the height direction. Here, FIG. 8 is shown only for the purpose of explaining the maximum L(2) in the drainage collecting pipe 1040 for super-high rise buildings, in order to easily understand the characteristic configuration of the present invention.

Next, if you have an extension tube,
As shown in FIG. 4A, in the case of the extension pipe 1102 and the extension pipe 1103, L(1)=355 mm, L(2)=36 mm,
As shown in FIG. 4B, in a two-stage drainage collecting pipe 1003 using a branched extension pipe 1104 between the standard upper pipe 1100 and the standard lower pipe 1500 of the standard drainage collecting pipe 1000, L(1) = 220 mm (the value closest to the lower limit value of L(1) of 150 mm when an extension pipe is provided), L(2) = 36 mm,
As shown in FIG. 4C, in the two-stage body extension drainage collecting pipe 1004 in which the extension pipe 1103 in FIG. 4A is replaced with a branched extension pipe 1104, L(1) = 480 mm (the value closest to the upper limit of L(1) of 500 mm), L(2) = 36 mm,
It is.
-Furthermore, as shown in Figure 14, in the case of the extended bottom floor drainage collector pipe 1061 using an extension pipe 1103 for the bottom floor drainage collector pipe 1060 (shown in Figure 9 (B)), L (2) = 136 mm (the value closest to the upper limit value of L (2) of 200 mm).

Furthermore, as shown in FIG. 5, in addition to the thermally expandable fireproof material 1712, it is also preferable to provide a thermally expandable fireproof tape 1713 on the outer periphery of the lower pipe receiving port 1502 (which is the outer periphery of the lower pipe at the fitting portion between the lower pipe and the upper pipe or extension pipe). When providing additional fireproof material in this way (in the case of the standard drainage collecting pipe 1000 shown in FIG. 5), L(2) = 5 mm (lower limit value of L(2) is 5 mm). This thermally expandable fireproof tape 1713 can also be provided on the super high-rise drainage collecting pipe 1040 and the lowest floor drainage collecting pipe 1060, regardless of whether an extension pipe is provided or not.

Based on L(1) = 45 mm in the standard drainage collecting pipe 1000 shown in Figure 1 and L(1) = 45 mm in the lowest floor drainage collecting pipe 1060 shown in Figure 9, the lower limit of L(1) is set to 30 mm in this invention, and based on L(1) = 480 mm in the two-stage body extension drainage collecting pipe 1004 shown in Figure 4 (C), the upper limit of L(1) is set to 500 mm in this invention. Note that the standard lower pipe 1500, which is the lower pipe in Figure 4 (C), can be changed to the lowest floor lower pipe 1560 to make L(1) = 480 mm in the lowest floor drainage collecting pipe 1060, so the upper limit of L(1) in the lowest floor drainage collecting pipe 1060 is set to 500 mm in this invention. Thus, in the present invention, whether it is the standard drainage collecting pipe 1000 or the lowest floor drainage collecting pipe 1060, it is preferable that L(1) (indicating the length below the branch) between the upper end of the lower pipe (the upper end of the lower pipe socket 1502) and the lower surface of the horizontal branch pipe is 30 mm or more and 500 mm or less. Furthermore, in the case of the super high-rise drainage collecting pipe 1040, L(1) = 135 mm as shown in Figure 6, so it is within the preferred range for L(1) (30 mm ≦ L(1) ≦ 500 mm).

Based on L(2) = 5 mm in the standard drainage collector 1000 (which may be a super-high rise drainage collector 1040 or a lowest floor drainage collector 1060 which, as described above, has a thermally expandable fire-resistant tape 1713 in addition to the thermally expandable fire-resistant material 1712) shown in Figure 5, the lower limit of L(2) is set to 5 mm in the present invention, and based on L(2) = 136 mm in the extended lowest floor drainage collector 1061 shown in Figure 14 (taking into account the case where the extension pipe 1103 is further extended), the upper limit of L(2) is set to 200 mm in the present invention. In addition, by changing the lower pipe in FIG. 14, the lowest floor lower pipe 1560, to the standard lower pipe 1500 to make the standard drainage collecting pipe 1000, or by changing the upper pipe in FIG. 14, the standard upper pipe 1100, to the super-high rise upper pipe 1140, and by changing the lower pipe in FIG. 14, the lowest floor lower pipe 1560 to the standard lower pipe 1500 to make the super-high rise drainage collecting pipe 1040, L(2) can be made 136 mm, so in this invention, the upper limit value of L(2) in the standard drainage collecting pipe 1000 and the super-high rise drainage collecting pipe 1040 is set to 200 mm.

Here, it is preferable that the distance L (3) between the upper end of the lower pipe (the upper end of the lower pipe receiving port 1502) and the upper surface of the floor slab S is 5 mm or more and 400 mm or less.

It can also be said that the distance L (3) between the upper end of the lower pipe (the upper end of the lower pipe receiving port 1502) and the upper surface of the floor slab S is preferably 5 mm or more and 50 mm or less when an extension pipe is not provided, and 50 mm or more and 400 mm or less when an extension pipe is provided.

More specifically,
FIG. 11 is a construction drawing showing the case where a standard drainage collecting pipe 1000 is rolled and piping is performed on the thinnest floor slab S (slab thickness t (S) = 75 mm).
FIG. 12 is an installation drawing of the case where the standard drainage collecting pipe 1000 is suspended on the thinnest floor slab S (slab thickness t(S) = 75 mm) (the upper end of the thermally expandable fireproof material 1712 is flush with the upper surface of the floor slab S and the height direction dimension of the thermally expandable fireproof material 1712 is a minimum of 8 mm);
FIG. 13 is a construction drawing showing the case where the body extension drainage collecting pipe 1002 is rolled and piping is performed on the thickest floor slab S (slab thickness t(S)=350 mm) (the lower end of the thermally expandable fireproof material 1712 is flush with the lower surface of the floor slab S),
・Figure 14 is a construction drawing of the case where the lowest floor drainage collector pipe 1061 with the extension pipe 1103 is rolled and piping is performed on the thinnest floor slab S (slab thickness t (S) = 75 mm) using the lowest floor drainage collector pipe 1060 shown in Figure 9 (B) (the fitting part with the lower pipe is located below the underside of the thinnest floor slab S (t (s) = 75 mm), and L (2) = 136 mm)
(In the construction drawing, the gap between the through hole and the drainage collecting pipe is filled with mortar M.)
As shown in FIG. 11, t(S) = 75 mm, L(3) = 43.5 mm (the value closest to the upper limit of L(3) of 50 mm when no extension tube is provided),
As shown in FIG. 12, t(S)=75 mm, L(3)=8 mm (the value closest to the lower limit of L(3) of 5 mm),
As shown in FIG. 13, t(S)=350 mm, L(3)=350 mm (the value closest to the upper limit of L(3) of 400 mm),
As shown in FIG. 14, t(S) = 75 mm, L(3) = 145 mm.

Based on L(3) = 8 mm in Figure 12, the lower limit value of L(3) is set to 5 mm in the present invention, and based on L(3) = 350 mm in Figure 13, the upper limit value of L(3) is set to 400 mm in the present invention. In addition, by changing the standard upper pipe 1100 in the standard drainage collecting pipe 1000 shown in Figures 12 and 13 to the super-high rise upper pipe 1140, the standard drainage collecting pipe 1000 can be made into a super-high rise drainage collecting pipe 1040, or by changing the standard lower pipe 1500 in the standard drainage collecting pipe 1000 shown in Figures 12 and 13 to the lowest floor lower pipe 1560, the standard drainage collecting pipe 1000 can be made into a lowest floor drainage collecting pipe 1060, so that L (3) = 8 mm and L (3) = 350 mm can be achieved. Therefore, in the present invention, the lower limit value of L (3) is set to 8 mm and the upper limit value of L (3) is set to 400 mm in the super-high rise drainage collecting pipe 1040 and the lowest floor drainage collecting pipe 1060.

In this way, if the distance L (3) between the upper end of the lower pipe (upper end of the lower pipe receiving port 1502) and the upper surface of the floor slab S is 5 mm or more and 400 mm or less, (1) even if the floor slab S is a thin slab (t(S) = 75 mm) in a rolling pipe system, the thermally expandable fire-resistant material 1712 will not protrude below the floor slab S, and optimal fire spread prevention effects can be achieved. Even if the thermally expandable fire-resistant material 1712 protrudes below the floor slab S, optimal fire spread prevention effects can be achieved because the outer layer member has fire resistance (vibration insulator 1720 formed from fire-resistant inorganic fibers that form the middle layer of the outer layer member).

As described above, the drainage collector pipe of this embodiment is a plastic drainage collector pipe that is installed by penetrating the floor slab of the lowest floor of a building, and can provide an optimal fire spread prevention effect even if (A) the floor slab is a thin slab with rolling piping, or (B) the upper pipe and the lower pipe have an overlapping position (for example, the lower pipe has a receiving structure and the lower end of the upper pipe is connected to the upper end of the lower pipe).
<First Modification>
A first modified example that can be applied to the drainage collecting pipe according to the embodiment described above will be described below with reference to Figures 15 to 17. In this first modified example and a second modified example described later, the same structures as those in the embodiment described above are denoted by the same reference numerals. The description of these structures overlaps with the description described above, so they will not be repeated in these two modified examples.

This first modified example differs in that it has a horizontal branch pipe receptacle 2122 that is attached (connected) by external fitting to the horizontal branch pipe connection part 1120 (at the connection part between the horizontal branch pipe connection part 1120 and the horizontal branch pipe receptacle 2122, the horizontal branch pipe connection part 1120 is an insertion port (male side: inside) and the horizontal branch pipe receptacle 2122 is an insertion port (male side: inside)) instead of the horizontal branch pipe receptacle 1122 that is attached (connected) by internal fitting to the horizontal branch pipe connection part 1120 described above (at the connection part between the horizontal branch pipe connection part 1120 and the horizontal branch pipe receptacle 1122, the horizontal branch pipe connection part 1120 is an insertion port (male side: inside) and the horizontal branch pipe receptacle 2122 is an insertion port (female side: outside)).

An example of the drainage collecting pipe 2000 according to the first modified example is shown in FIG. 15. The top view of this drainage collecting pipe 2000 (standard upper pipe 2100 + standard lower pipe 1500) is shown in FIG. 15(A), its side view is shown in FIG. 15(B), its 15C-15C cross section is shown in FIG. 15(C), and its enlarged view of area 15D is shown in FIG. 15(D). In comparison with the figures in the above-mentioned embodiment, the upper riser pipe U is connected via the riser pipe receptacle 1112 and rubber ring 1114 provided in the upper riser pipe connection part 1110, and the side branch pipe S (2) (at 3 o'clock) and the side branch pipe S (3) (at 6 o'clock) are connected via the side branch pipe receptacle 1122 and rubber ring 1124 provided in the side branch pipe connection part 1120. In this modified example, the side branch pipe S(1) (at 0 o'clock) is connected to the drainage collection pipe 2000 via a side branch pipe receptacle 2122 and a rubber ring 2124 provided in the side branch pipe connection section 1120.

As shown in FIG. 15, the side branch pipe receptacle 2122 (unlike the side branch pipe receptacle 1122) is externally fitted to the side branch pipe connection part 1120 (at the connection part between the side branch pipe connection part 1120 and the side branch pipe receptacle 2122, the side branch pipe connection part 1120 is the insertion port (male side: inside) and the side branch pipe receptacle 2122 is the receptacle (female side: outside)). As an example, when connecting a side branch pipe S (1) with a nominal diameter of 100 to the side branch pipe connection part 1120, the side branch pipe receptacle 2122 is attached to the side branch pipe connection part 1120 by external fitting. As described above, although not limited thereto, it is preferable to use a rubber ring receptacle equipped with a rubber ring 2124. By using such a rubber ring receptacle, it is possible to improve the fit. Note that this side branch pipe receptacle 2122 is an integrally molded product.

Further, without being limited thereto, the axis of the side branch pipe S(1) connected to the side branch pipe receptacle 2122 shown in FIG. 15 is offset upward with respect to the axis of the side branch pipe connection part 1120. In addition, in the side branch pipe receptacle 2122, the diameter of the side branch pipe connection part 1120 and the diameter of the side branch pipe S(1) may be the same or different. A characteristic configuration is that the side branch pipe receptacle 2122 (unlike the side branch pipe receptacle 1122) is externally fitted to the side branch pipe connection part 1120. As will be described with reference to the next FIG. 16, the drainage collecting pipe 2000 shown in FIG. 15 has three side branch pipe connection parts 1120 other than the one at the 9 o'clock position, and the side branch pipe receptacle 2122 is attached to only the side branch pipe connection part 1120 at the 0 o'clock position by external fitting, but is not limited to applying the side branch pipe receptacle 2122 to only one direction.

Figure 16 shows another application example (part 1) of this first modified example.

As shown in Fig. 16(A) as a top view and Fig. 16(B) as a side view, the drainage manifold 2001 (standard upper pipe 2101 + standard lower pipe 1500) has a standard upper pipe 2101 with one side branch pipe connection 1120, to which a side branch pipe socket 2122 is attached by external fitting.

As shown in Fig. 16(C) as a top view and Fig. 16(D) as a side view, the drainage manifold 2002 (standard upper pipe 2102 + standard lower pipe 1500) has a standard upper pipe 2102 with two side branch pipe connections 1120, and side branch pipe sockets 2122 are attached to the two side branch pipe connections 1120 by external fitting.

Furthermore, as shown in Fig. 16(E) in a top view and Fig. 16(F) in a side view, a drainage collecting pipe 2003 (standard upper pipe 2103 + standard lower pipe 1500) has three side branch pipe connecting portions 1120 in the standard upper pipe 2103, and side branch pipe sockets 2122 are attached to the three side branch pipe connecting portions 1120 by external fitting. The drainage collecting pipe 2003 shown in Fig. 16(C) is the drainage collecting pipe 2000 shown in Fig. 15 in which side branch pipe sockets 2122 are also attached to the side branch pipe connecting portions 1120 at the 3 o'clock and 6 o'clock positions by external fitting.

Figure 17 shows another application example (part 2) of this first modified example.

As shown in Fig. 17(A) as a top view and Fig. 17(B) as a side view, the drainage collecting pipe for super-high rise buildings 2040 (super-high rise upper pipe 2140 + standard lower pipe 1500) has three side branch pipe connections 1120 in the super-high rise upper pipe 2140, and a side branch pipe socket 2122 is attached to one of the side branch pipe connections 1120 (here, the one at 0 o'clock) by external fitting.

As shown in Fig. 17(C) as a top view and Fig. 17(D) as a side view, the drainage manifold 2060 for the lowest floor (standard upper pipe 2100 + lower pipe 1560 for the lowest floor) has three side branch pipe connections 1120, and the side branch pipe socket 2122 is attached to one of the side branch pipe connections 1120 (here, the one at 0 o'clock) by external fitting.

Furthermore, as shown in Figure 17 (E) as a top view and Figure 17 (F) as a side view of a two-stage branch drainage collecting pipe 2080 (standard upper pipe 1100 + body pipe for two-stage lower branch 2180 + standard lower pipe 1500), the standard upper pipe 1100 has three side branch pipe connection parts 1120, and side branch pipe receiving ports 2122 are attached to the three side branch pipe connection parts 1120 by external fitting, and the body pipe for two-stage lower branch 2180 has three side branch pipe connection parts 1120, and side branch pipe receiving ports 1122 are attached to the three side branch pipe connection parts 1120. In the two-stage branch drainage collecting pipe 2080 shown in FIG. 17(E), the side branch pipe receptacle 1122 may be attached to the upper stage side and the side branch pipe receptacle 2122 may be attached to the lower stage side by external fitting, or, although there are six side branch pipe connection parts 1120 in two stages, top and bottom, the side branch pipe receptacle 2122 may be attached to any of the six side branch pipe connection parts 1120 by external fitting. Note that the standard upper pipe 1100 and the two-stage lower branch body pipe 2180 may be composed of one resin molded product, two resin molded products, or any other number of resin molded products. Also, the number of stages does not have to be limited to two.

As described above, the horizontal branch pipe receiving port 2122 that is externally fitted into the horizontal branch pipe connection portion 1120 of this modified example can be applied to standard drainage collection pipes, super high-rise drainage collection pipes, bottom floor drainage collection pipes, and multi-stage branch drainage collection pipes.
<Second Modification>
Hereinafter, a second modified example that can be applied to the drainage collecting pipe according to the above-described embodiment will be described with reference to FIGS.

The upper pipe 1100 constituting the drainage collecting pipe 1000 according to the above-mentioned embodiment is provided with a eaves 1240 as an optional configuration for preventing backflow of drainage water, which prevents drainage water from the upper floor from flowing back into the side branch pipe. In this second modified example, a small protrusion is provided near the height position where the eaves 1240 is provided. When drainage water flows vigorously from the upper riser pipe U into the drainage collecting pipe 1000, the drainage flow may flow down the inside of the drainage collecting pipe 1000 while forming a cylindrical water film. In this case, the drainage flow that has become a cylindrical water film passes through the connection with the side branch pipe so as to block the connection, so that there is a problem of obstructing the drainage flowing from the side branch pipe into the drainage collecting pipe 1000, or there is a problem of drainage water flowing back into the side branch pipe. In order to avoid this, the small protrusion cuts such a water film.

An example of a drainage collecting pipe 3000 according to the second modified example having such small protrusions is shown in Figure 18. A top view of this drainage collecting pipe 3000 (standard upper pipe 3100 + standard lower pipe 1500) is shown in Figure 18(A), its 18B-18B cross-sectional view is shown in Figure 18(B), its 18C-18C cross-sectional view is shown in Figure 18(C), an enlarged view of region 18D is shown in Figure 18(D), an enlarged view of region 18E is shown in Figure 18(E), and an enlarged view of region 18F is shown in Figure 18(F).

As shown in FIG. 18, the small protrusion 3010 is provided at one location (here, at the 9 o'clock position) near the height direction position where the eaves 1240 is provided. This small protrusion 3010 is formed of a curved surface and has a shape pointed upward, although this is not limited thereto. The shape of this small protrusion is not limited to the shape shown in FIG. 18, and may be, for example, the shape shown in FIG. 19. Here, FIG. 19(A), FIG. 19(C), FIG. 19(E), and FIG. 19(G) are figures corresponding to FIG. 18(D), and FIG. 19(B), FIG. 19(D), FIG. 19(F), and FIG. 19(H) are figures corresponding to FIG. 18(E). As shown in these FIG. 18 and FIG. 19, the small protrusions 3010, 3020, and 3022 may be configured with a curved surface, or the small protrusions 3030 and 3032 may be configured with only a flat surface (angular shape, pointed shape, etc.) without a curved surface. In this way, the shape of the small protrusions is not limited as long as they have the function of cutting off the water film. As described in the above embodiment, the eaves 1240 have the function of preventing the drainage water from the upper floor from flowing back into the horizontal branch pipe, and can be provided so that, for example, the drainage water that hits the small protrusions and splashes back into the horizontal branch pipe can be prevented from flowing back into the horizontal branch pipe.

Next, the position and number of small protrusions will be explained with reference to Figure 20.

As shown in the drainage collecting pipe 3001 (standard upper pipe 3101 + standard lower pipe 1500) shown in the top view in Figure 20 (A) and the 20B-20B cross section in Figure 20 (B), the small protrusion 3010 is provided at one location (here, the 0 o'clock direction where the swirl vane 1600 is located) upstream of the horizontal branch pipe connection part 1120 (here, near the height position where the eaves 1240 is located). Also, as shown in the drainage collecting pipe 3002 (standard upper pipe 3102 + standard lower pipe 1500) shown in the top view in Figure 20 (C) and the 20D-20D cross section in Figure 20 (D), the small protrusion 3010 is provided at three locations (here, other than the 3 o'clock direction where the eaves 1240 is located) near the height position where the eaves 1240 is located. In this way, the location and number of small protrusions are not limited (except when they cannot be installed because they overlap with the eaves 1240, etc.). Note that the small protrusion in FIG. 20 has the same shape as the small protrusion 3010 in FIG. 18, and regions 18D, 18E, and 18F in FIG. 20 correspond to FIGS. 18(D), 18(E), and 18(F), and show enlarged views of those regions (however, the direction of region 18D in FIG. 20(C) may not coincide with the direction in FIG. 18(D)).

Also, small protrusions 3010 can be provided as in the bottom floor drainage manifold 3060 (standard upper pipe 3100 + bottom floor lower pipe 1560), shown in the top view in Figure 21(A), the cross section in Figure 21(B) at 21B-21B, and the cross section in Figure 21(C) at 21C-21C. Note that the small protrusions in Figure 21 have the same shape as the small protrusions 3010 in Figure 18, and areas 18D, 18E, and 18F in Figure 21 correspond to Figures 18(D), 18(E), and 18(F), and enlarged views of these areas are shown.

As described above, the small projections for cutting the water film provided on the upper pipe of the drainage collecting pipe in this modified example are not limited in shape or number as long as they have the function of cutting the water film, and furthermore can be applied to both standard drainage collecting pipes and bottom floor drainage collecting pipes.

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

The present invention is suitable for a plastic drainage collection pipe that is installed through the floor slab of the lowest floor of a building, and is particularly suitable in that it can provide optimal fire spread prevention effects even if (A) the floor slab is a thin slab with rolling piping, or (B) there is an overlapping position between the upper pipe and the lower pipe (for example, the lower pipe has a receiving structure and the lower end of the upper pipe is connected to the upper end of the lower pipe).

1000 Drainage collecting pipe 1100 Upper pipe 1200 Deflection plate (first protrusion)
1310: First backflow prevention rib; 1320: Second backflow prevention rib; 1330: Third backflow prevention rib (end point side backflow prevention rib)
1340 Fourth backflow prevention rib (starting point side backflow prevention rib)
1410 Body equal diameter rib 1412 Rubber ring positioning rib 1500 Lower tube 1600 Swirl vane (second protrusion)
1700 Outer layer material

Claims (11)

A resin drainage collecting pipe to be placed in a through hole of the floor slab of the lowest floor of a building,
The drainage collecting pipe includes an upper pipe protruding above the floor slab and a lower pipe connected below the upper pipe, the lower pipe having a reduced diameter portion;
Between the upper pipe and the lower pipe, one or more extension pipes may be connected, with or without a lateral branch pipe connection,
The upper pipe includes an upper riser pipe connection portion for connecting an upper riser pipe through which drainage water flows in from an upper floor, and at least one horizontal branch pipe connection portion for connecting a horizontal branch pipe above the floor slab,
The lower pipe includes a joint connection portion that connects a leg joint that drains wastewater to a horizontal main pipe directly or via another pipe,
A thermally expandable fireproof material is provided above the upper end of the lower pipe and below the upper end of an outer layer member covering the lower pipe and the drainage collecting pipe,
A drainage collecting pipe, characterized in that only the upper pipe or only the extension pipe is present on the inner circumference of the thermally expandable fire-resistant material. The drainage manifold according to claim 1, characterized in that the inner circumference of the thermally expandable fireproof material only has straight pipe sections that do not have internal protrusions. The drainage collecting pipe according to claim 1 or 2, characterized in that a water-stopping member that seals the outer layer member against the outer periphery of the upper pipe and has water-stopping properties is provided at the upper end of the outer layer member, and the outer layer member covers the drainage collecting pipe. The drainage manifold according to claim 1 or 2, characterized in that the upper end of the thermally expandable fireproof material is located below the upper surface of the floor slab. The lower end of the thermally expandable fireproof material is located above the lower surface of the floor slab.
or
When the lower end of the thermally expandable fire-resistant material is not located above the lower surface of the floor slab, the outer layer member has fire resistance.
The drainage collecting pipe according to claim 1 or 2, characterized in that The drainage collecting pipe according to claim 1 or 2, characterized in that the distance between the upper end of the lower pipe and the lower surface of the horizontal branch pipe is 30 mm or more and 500 mm or less. The drainage manifold according to claim 1 or 2, characterized in that the distance between the upper end of the lower pipe and the upper surface of the floor slab is 5 mm or more and 400 mm or less. The drainage collecting pipe according to claim 1 or 2, characterized in that the distance between the lower end of the thermally expandable fireproof material and the start position of the reduced diameter portion of the lower pipe is 5 mm or more and 200 mm or less. The drainage manifold according to claim 1 or 2, characterized in that the height dimension of the thermally expandable fireproof material is 8 mm or more and 50 mm or less. 3. The drainage collecting pipe according to claim 1 or 2, wherein the volume of the thermally expandable fireproof material is 30 mm3 or ^more and ²⁰⁰ mm3 or less. The drainage collecting pipe according to claim 1 or 2, further comprising a heat expandable fireproof tape on an outer periphery of the lower pipe at a fitting portion between the lower pipe and the upper pipe or the extension pipe.

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