Drainage collecting pipe, and test method for solid matter entry from drainage collecting pipe into horizontal branch pipe

Abstract

To provide a drainage collecting pipe capable of preventing solid matter contained in drainage from entering a horizontal branch pipe of the drainage collecting pipe.SOLUTION: A standard drainage collecting pipe 1000 includes a standard upper pipe 1100 and a standard lower pipe 1500. The upper pipe 1100 includes: an upper standing pipe connection part 1110 for connecting an upper standing pipe; and up to three horizontal branch pipe connection parts 1120 for connecting a horizontal branch pipe above a floor slab. The lower pipe 1500 includes a lower standing pipe connection part 1510 for connecting a lower standing pipe. The upper pipe 1100 includes an upper deflector plate 1240 provided at a circumferential position opposing to an inner wall where no horizontal branch pipe connection part 1120 exists at a height position above a tube axis of the horizontal branch pipe connection part 1120, or a lower deflector plate protruding inward from the inner wall where no horizontal branch pipe connection part 1120 exists at a height position below the tube axis of the horizontal branch pipe connection part 1120.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a resin drainage manifold provided through a building floor slab, comprising an upper pipe having an upper riser connection portion for connecting an upper riser (upward riser) that protrudes above the floor slab and allows drainage to flow in from an upper floor, and at least one lateral branch pipe connection portion for connecting a lateral branch pipe above the floor slab, and a lower pipe connected below the upper pipe for connecting a lower pipe (downward riser, leg joint) that discharges drainage to a lower floor. In particular, the present invention relates to a drainage manifold that can preferably suppress solids including contaminants from flowing into the lateral branch pipes of the drainage manifold even when solids are carried along with the drainage flowing in the riser (vertical pipe), and a method for testing the intrusion of test solids from the drainage manifold into the lateral branch pipes.

Background Art

[0002] Water supply facilities and drainage facilities are provided in apartment buildings, office buildings, etc. Among these, the drainage facilities typically include a drainage piping system comprising risers (upward risers, downward risers) that penetrate the building vertically from floor to floor, lateral branch pipes connected to plumbing fixtures (drainage fixtures) installed on each floor, and drainage manifolds that connect these (the lower pipe of the drainage manifold for the lowest floor is connected to a leg joint connected to a main lateral pipe). (Although the lower pipe of the drainage manifold for the lowest floor may be connected via other pipe materials, it will be described below as being directly connected.)

[0003] And the drainage manifold used in such a drainage pipe system is provided by penetrating the floor slab of the building when constructed in the building, and has an upper pipe connection part that protrudes above the floor slab and connects an upper pipe (upper riser) for allowing drainage to flow in from the upper floor, and at least one lateral branch pipe connection part for connecting a lateral branch pipe above the floor slab. It includes a lower pipe connected to the lower part of the upper pipe for discharging drainage to the lower floor (lower riser, leg joint). In a super high-rise building, depending on the floor, a super high-rise drainage manifold, a medium high-rise drainage manifold (sometimes referred to as a standard drainage manifold), and a basement floor drainage manifold are used appropriately. And in the drainage manifolds of each of these floors, an upper riser is connected above, a leg joint connected to a lower riser or a main horizontal pipe below, and a lateral branch pipe is connected laterally to form a drainage pipe system. Note that, in addition to the basement floor drainage manifold, a swivel vane is often provided in the lower pipe. Also, as such a drainage manifold, one formed of one or more resin injection molded products is widely known.

[0004] As such a drainage manifold (pipe joint), Japanese Patent Application Laid-Open No. 2021-046715 (Patent Document 1) discloses a pipe joint including a joint body formed in a cylindrical shape, a lateral joint part having an end connected to the side surface of the joint body, an opening formed at the end communicating with the inside of the joint body, and a lateral pipe part connected thereto, and an annular body inserted into the joint body, extending from the annular body, provided so as to project from the inner peripheral surface of the joint body, extending in the axial direction of the joint body, and having a backflow prevention part formed at a desired position in the lateral joint part. A pipe joint is disclosed in which a swivel vane is provided so as to project in the axial direction from the annular body and swirl the flow of water passing through the joint body. Paragraph 0048 of this Patent Document 1 describes that "furthermore, since the drainage is guided to flow downward while swirling by the swivel vanes 45, 47, 49, it is possible to suppress the backflow of the reflected flow of the drainage to the lateral pipe part 22C side."

[0005] In addition, as a drainage collecting pipe (pipe joint, joint pipe) for the lowest floor, Japanese Patent No. 7290536 (Patent Document 2) discloses a pipe joint that generates a cut by a protrusion in the flow of water flowing from a vertical pipe into a joint pipe body, ensuring that water flows reliably from a lateral branch pipe into the joint pipe body side. This pipe joint is a pipe joint disposed in a through-hole of a building floor slab, having a vertical pipe connection portion connectable to an upstream vertical pipe at the upper end, and having only one lateral branch pipe connection portion on the side surface connectable to a lateral branch pipe that guides drainage discharged from a drainage facility into the pipe joint. In the joint pipe body, one or more protrusions are formed on the inner peripheral surface on the vertical pipe connection portion side upstream of the lateral branch pipe connection portion. The protrusion is disposed at the same position as the opening of the lateral branch pipe connection portion in a plan view from the central axis of the joint pipe body, and the height of the protrusion is 5 to 15 mm. According to this pipe joint, by providing one or more protrusions protruding in the inner peripheral direction on the upstream side of the vertical pipe connection portion side with respect to the lateral branch pipe connection portion of the joint pipe body, it is possible to form a dividing portion corresponding to a cut in the flow of water flowing while forming a cylindrical water film from the vertical pipe to the joint pipe body side. Water attempting to flow into the joint pipe body through the lateral branch pipe connection portion can flow into the joint pipe body through this dividing portion. Therefore, even when water flows vigorously from the vertical pipe to the joint pipe body side and a cylindrical water film is generated in the joint pipe body, water can flow from the lateral branch pipe into the joint pipe body without hindrance. For this reason, it is possible to suppress the internal pressure from becoming excessively high in the joint pipe body near the lateral branch pipe connection portion, and prevent the reverse flow phenomenon of water from the joint pipe body to the lateral branch pipe side. Paragraph 0025 of this Patent Document 2 states that "Among a plurality of collecting joints, as shown in FIG. 1, the characteristic configuration of the present embodiment described later is applied to the collecting joint 21 for the lowest floor provided on the lowest floor of the building."

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0007] By the way, in such a drainage pipe system, the drainage from a plurality of plumbing fixtures (drainage fixtures such as washbasins, laundries, bathtubs, kitchens, toilets, etc.) on each floor is collected in the drainage manifold through the lateral branch pipes connected to the drainage manifolds (pipe joints and joint pipes in Patent Documents 1 and 2) provided on each floor, and is discharged to the lower floor in addition to the drainage flowing in from the upper floor. In this way, solid matter such as dirt together with the drainage (water) flows through the riser pipe from the upper floor and converges in the drainage manifolds other than the top floor repeatedly. If the solid matter flowing in from the upper floor together with the drainage jumps from the drainage manifold into the lateral branch pipe, in the worst case, it may reach the drainage fixture (toilet) and the solid matter (dirt, etc.) may invade the toilet water seal. There is also a possibility that problems such as the lateral branch pipe being clogged with solid matter (dirt, etc.) may occur.

[0008] However, even if it is possible to prevent the backflow of water from the joint pipe body to the lateral branch pipe side, such as the pipe joints and joint pipes disclosed in Patent Document 1 and Patent Document 2, or to generate a cut in the water film formed by the drainage flowing from the vertical pipe into the joint pipe body by the protrusion (cut the water film) so that the water can flow smoothly from the lateral branch pipe into the joint pipe body and suppress the internal pressure in the joint pipe body near the lateral branch pipe connection part from becoming too high, there is still a risk that the solid matter flowing in from the upper floor together with the drainage may jump from the drainage manifold into the lateral branch pipe. For example, in Patent Document 1, even though the drainage is guided to flow downward while swirling by the swivel vane 45, since the position of the swivel vane 45 in the height direction is not provided below the pipe axis of the lateral branch pipe connection part, there is still a risk of backflow to the lateral pipe part 22A side even if it is possible to temporarily suppress the backflow of the reflected flow of the drainage to the lateral pipe part 22C side. Also, in Patent Document 2, since the water film cutting protrusion is above the upper edge of the lateral branch pipe connection part, the reflected flow hitting the water film cutting protrusion may flow back from the joint pipe body to the lateral branch pipe side.

[0009] Also, although a test method for the drainage capacity of the drainage collection pipe is defined (for example, "Test Method for Drainage Capacity of Drainage Standpipe System in Apartment Houses (SHASE-S218)" of the Japan Air Conditioning and Sanitary Engineering Association), a test method for the entry of solids into the lateral branch pipes of the drainage collection pipe is not defined.

[0010] Therefore, based on such a situation, the applicant of the present application, in view of the above two problems that may occur, has diligently developed a drainage collection pipe itself in which solids do not jump from the drainage collection pipe into the lateral branch pipes or are extremely suppressed, and a test method for confirming that solids do not jump from the drainage collection pipe into the lateral branch pipes.

[0011] The present invention has been developed in view of the above problems and the current situation where the test method has not been established. The object is to preferably suppress solids from jumping into the lateral branch pipes of the drainage collection pipe even when solids containing dirt flow together with the drainage flowing through the riser pipe, and to provide a drainage collection pipe and a test method for the jumping test of test solids from the drainage collection pipe to the lateral branch pipe.

Means for Solving the Problems

[0012] To achieve the above object, the drainage collection pipe according to an aspect of the present invention takes the following technical means.

[0013] The drain collecting pipe according to the present invention is a resin drain collecting pipe disposed in a through hole of a floor slab of a building. The drain collecting pipe includes an upper pipe protruding above the floor slab and a lower pipe connected to a lower pipe for discharging drainage. The longitudinal pipe axis of the upper pipe and the longitudinal pipe axis of the lower pipe coincide to form the axis core of the drain collecting pipe. The upper pipe includes an upper riser connection part for connecting an upper riser for draining water from an upper floor and up to three lateral branch pipe connection parts for connecting lateral branch pipes above the floor slab. The lower pipe includes a lower pipe connection part for connecting the lower pipe and a reduced diameter part provided on the upstream side of the lower pipe connection part. The upper pipe is provided with an upper deflector plate for changing the flow of drainage at a circumferential position facing an inner wall where there is no lateral branch pipe connection part at a height position above the pipe axis of the lateral branch pipe connection part, or a lower deflector plate protruding from the inner wall where there is no lateral branch pipe connection part at a height position below the pipe axis of the lateral branch pipe connection part to the inner circumference to change the flow of drainage.

[0014] Preferably, in the following <jumping test method>, for the drain collecting pipe according to the present invention, taking (number of jumps / number of tests) × 100 calculated based on the results visually confirmed as the jumping rate A (%) and the jumping distance B (mm) to the lateral branch pipe with reference to the end face of the lateral branch pipe receiving member, the drain collecting pipe can be configured to satisfy that A is less than (0.04 (%) × number of drain collecting pipes to be tested excluding the top floor) or B is less than 300 mm. <Jumping test method> · Install the drain collecting pipe on each floor of the 5th floor and above, drop more than 1000 test solids from the top floor, and visually check whether jumping from the drain collecting pipe installed on each floor to the lateral branch pipe occurs. · The test solids are substantially spherical in shape with a diameter of φ4 to φ30 mm and are formed of a low-rebound material with a coefficient of restitution of 0.5 or less.

[0015] Moreover, a test method according to another aspect of the present invention is a method for testing the jumping of test solids from a resin drainage manifold disposed in a through-hole of a building floor slab to a lateral branch pipe. The drainage manifold includes an upper pipe protruding above the floor slab and a lower pipe connected to a lower pipe for discharging drainage. The longitudinal pipe axis of the upper pipe and the longitudinal pipe axis of the lower pipe coincide to form the axis of the drainage manifold. The upper pipe includes an upper riser connection portion for connecting an upper riser for flowing drainage from an upper floor and up to three lateral branch pipe connection portions for connecting lateral branch pipes above the floor slab. The lower pipe includes a lower pipe connection portion for connecting the lower pipe and a reduced diameter portion provided on the upstream side of the lower pipe connection portion. The test method includes the steps of installing the drainage manifold on each floor of the fifth floor or higher, preparing test solids in a substantially spherical shape with a diameter of φ4 to φ30 mm formed of a low-rebound material having a rebound coefficient of 0.5 or less, and dropping 1,000 or more of the test solids from the top floor and visually checking whether or not jumping occurs from the drainage manifold installed on each floor to the lateral branch pipe.

[0016] Preferably, based on the result of visual confirmation, (number of jumps / number of tests) × 100 is defined as the jump rate A (%) and the jump distance B (mm) to the lateral branch pipe with reference to the end face of the lateral branch pipe receiving member. A determination step of determining pass / fail based on whether or not the above A is less than (0.04 (%) × the number of drainage manifolds to be tested excluding the top floor) or the above B is less than 300 mm can be further included.

Advantages of the Invention

[0017] According to the present invention, it is possible to preferably provide a drainage manifold that can suitably suppress solids including dirt from flowing together with the drainage flowing in the riser from jumping into the lateral branch pipe of the drainage manifold, and a method for testing the jumping of test solids from the drainage manifold to the lateral branch pipe.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

[0019] <Drainage Manifold: Overall Structure> Hereinafter, with reference to FIGS. 1 to 3, the overall structure of the drainage manifold according to an embodiment of the present invention will be described in detail.

[0020] In the following description, the outer peripheral surface, outer surface, outer side, outer layer side, outer peripheral side, outer side, inner layer side, inner peripheral side, inner side, thermal expansion refractory, refractory, and thermal expansion material may not be clearly distinguished. Also, in the cross-sectional view, members may not be clearly distinguished depending on the type of hatching. Further, for ease of understanding of the present invention, in the top view or bottom view, the direction of the lateral branch pipe may be specified using 0 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock with reference to the hour hand of a clock. In the figures, reference numerals (consisting of a number + (optionally) an alphabet) attached to a one-dot chain line together with an arrow indicate that the number represents the figure number and the alphabet represents the branch number (A, B, C, etc.) in that figure, and a cross-sectional view is shown in the figure specified by that reference numeral. In the figures, reference numerals attached to a dotted line together with an arrow and including the alphabet S indicating a space (only 1330S).

[0021] In addition, the drain manifold according to the present embodiment described below is not limited to any of those for super high-rise buildings, the lowest floor, or mid-rise buildings, unless otherwise specified. Also, when simply described as a (non-signified) drain manifold, an upper pipe, and a lower pipe, it means a drain manifold, an upper pipe, and a lower pipe that are not limited to any of those for mid-rise buildings, super high-rise buildings, or the lowest floor. Further, the lower pipe used for the super high-rise drain manifold 1040 and the mid-rise drain manifold 1000 may be referred to as the standard lower pipe 1500, the upper pipe used for the lowest floor drain manifold 1060 and the mid-rise drain manifold 1000 may be referred to as the standard upper pipe 1100, and the mid-rise drain manifold may be referred to as the standard drain manifold 1000.

[0022] With reference to FIG. 1 showing the super high-rise drain manifold 1040, FIG. 2 showing the mid-rise drain manifold 1000, and FIG. 3 showing the lowest floor drain manifold 1060, which are the drain manifolds according to the present embodiment, the drain manifold according to the present embodiment will be described. Note that the same reference numerals are given to the common configurations in these three figures, and the common configurations will not be repeatedly described.

[0023] First, the combination of the upper pipe and the lower pipe of the drain manifold according to the present embodiment will be described. The super high-rise drain manifold 1040 shown in these figures (particularly FIG. 1) is composed of a super high-rise upper pipe 1140 having a downward deflector plate 1200 and a standard lower pipe 1500 having a turning vane 1600 (where the taper portion DR and the height position overlap) connected below the super high-rise upper pipe 1140. Further, the mid-rise drain manifold 1000 shown in these figures (particularly FIG. 2) is composed of a standard upper pipe 1100 having an upward deflector plate 1240 and no downward deflector plate 1200, and a standard lower pipe 1500 having a turning vane 1600 (where the taper portion DR and the height position overlap) connected below the standard upper pipe 1100. Furthermore, the lowest floor drain manifold 1060 shown in these figures (particularly FIG. 3) is composed of a standard upper pipe 1100 having an upward deflector plate 1240 and no downward deflector plate 1200, and a lowest floor lower pipe 1560 having a reduced diameter portion 1660 and no turning vane 1600 connected below the standard upper pipe 1100.

[0024] These three types of drainage collecting pipes (a drainage collecting pipe 1000 for mid- to high-rise buildings, a drainage collecting pipe 1040 for ultra-high-rise buildings, and a drainage collecting pipe 1060 for the lowest floor) will be described. All three types of drainage collecting pipes are resin drainage collecting pipes that are placed in through holes in the floor slab of a building. As shown in FIG. 2, the drainage collecting pipe 1000 for mid- to high-rise buildings includes a standard upper pipe 1100 that protrudes above the floor slab, and a standard lower pipe 1500 that is connected below the standard upper pipe 1100. The standard upper pipe 1100 includes an upper riser pipe connection part 1110 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 1120 that connects a horizontal branch pipe above the floor slab. The standard lower pipe 1500 includes a lower riser pipe connection part 1510 as a lower pipe connection part that connects a lower riser pipe that allows drainage water to flow out to the lower floor. The standard lower pipe 1500 has a tapered portion DR (as a diameter-reduced portion of the lower pipe) and a swirl vane 1600 at a position overlapping with the tapered portion DR in the height direction. The downstream pipe connection portion 1510 may be provided separately from the standard lower pipe 1500 or may be provided integrally therewith.

[0025] Among these drainage collector pipes, the super-high rise drainage collector pipe 1040 differs from the mid- to high-rise drainage collector pipe 1000 described above in that, as shown in FIG. 1, the standard upper pipe 1100 shown in FIG. 2 that protrudes above the floor slab has been changed to a super-high rise upper pipe 1140 that does not have an upper deflection plate 1240 but has a lower deflection plate 1200.

[0026] Among these drain collecting pipes, the lowest floor drain collecting pipe 1060 is different from the above-described mid- to high-rise drain collecting pipe 1000 in that, as shown in FIG. 3, the standard lower pipe 1500 shown in FIG. 2 connected below the standard upper pipe 1100 is changed to a lowest floor lower pipe 1560 having a reduced diameter portion 1660 without a swivel vane 1600. This lowest floor lower pipe 1560 includes a joint connection portion 1570 as a lower pipe connection portion for connecting a leg joint for discharging drainage to the horizontal main pipe. Note that the joint connection portion 1570 may be provided separately from or integrally with the lowest floor lower pipe 1560, just like the lower vertical pipe connection portion 1510 of the standard lower pipe 1500.

[0027] As an example, a riser receiving port member 1112 and a rubber ring 1114 are provided at the upper vertical pipe connection portion 1110, and the upper vertical pipe and the drain collecting pipe are connected via these. A lateral branch pipe receiving port member 1122 and a rubber ring 1124 are provided at the lateral branch pipe connection portion 1120, and the lateral branch pipe and the drain collecting pipe are connected via these.

[0028] In the drain collecting pipe according to this embodiment, in a top view of the drain collecting pipe as shown in FIGS. 1 to 3, lateral branch pipe connection portions 1120 are provided in the 0 o'clock, 3 o'clock, and 6 o'clock directions, and no lateral branch pipe connection portion 1120 is provided in the 9 o'clock direction. However, at least one (maximum three) lateral branch pipe connection portion 1120 may be provided. Also, like this drain collecting pipe, lateral branch pipe connection portions 1120 are provided at three locations other than 9 o'clock, and the lateral branch pipe connection portions 1120 in the directions where the lateral branch pipes are not connected during construction may be plugged using plugs (these plugs may be plugged via the lateral branch pipe receiving port member 1122 and the rubber ring 1124).

[0029] As described above, the high-rise drainage manifold 1040 shown in FIG. 1, the mid-rise (standard) drainage manifold 1000 shown in FIG. 2, and the ground floor drainage manifold 1060 shown in FIG. 3, which are the drainage manifolds according to the present embodiment, are all resin drainage manifolds arranged in the through-holes of the floor slabs of the building. These three types of drainage manifolds include an upper pipe (standard upper pipe 1100 or high-rise upper pipe 1140) protruding above the floor slab, and a lower pipe (standard lower pipe 1500 or ground floor lower pipe 1560) connected to a lower pipe (downward vertical pipe or leg joint) for discharging drainage. The longitudinal pipe axis of the upper pipe and the longitudinal pipe axis of the lower pipe coincide to form the axis of the drainage manifold. The upper pipes (standard upper pipe 1100 and high-rise upper pipe 1140) include an upper vertical pipe connection portion 1110 for connecting an upper vertical pipe for draining water from the upper floor, and up to three horizontal branch pipe connection portions 1120 for connecting horizontal branch pipes above the floor slab. The lower pipes (standard lower pipe 1500 and ground floor lower pipe 1560) include a lower pipe connection portion (the standard lower pipe 1500 has a lower vertical pipe connection portion 1510 for connecting a lower vertical pipe, and the ground floor lower pipe 1560 has a joint connection portion 1570 for connecting a leg joint), and a reduced diameter portion provided on the upstream side of the lower pipe connection portion (the standard lower pipe 1500 has a tapered portion DR, and the ground floor lower pipe 1560 has a reduced diameter portion 1660). The upper pipe is provided with an upper flow deflection plate 1240 (the upper flow deflection plate 1240 in the standard upper pipe 1100 used in the mid-rise drainage manifold 1000 and the ground floor drainage manifold 1060) for changing the flow of drainage at a circumferential position (here, the 3 o'clock direction) facing the inner wall (here, the 9 o'clock direction) where there is no horizontal branch pipe connection portion 120 at a height position above the pipe axis of the horizontal branch pipe connection portion 1120, or a lower flow deflection plate 1200 (the lower flow deflection plate 1200 in the high-rise upper pipe 1140 used in the high-rise drainage manifold 1040) protruding from the inner wall (here, the 9 o'clock direction) where there is no horizontal branch pipe connection portion 1120 at a height position below the pipe axis of the horizontal branch pipe connection portion 1120 and projecting inward to change the flow of drainage. The drainage manifold according to the present embodiment having such a characteristic structure will be described in more detail. Note that the present invention does not exclude a drainage manifold provided with both the upper flow deflection plate 1240 and the lower flow deflection plate 1200.

[0030] <Drainage manifold: upper pipe> As a structure common to the upper pipes used in the three types of drainage manifolds according to this embodiment, as an optional structure for preventing the backflow of drainage, a backflow prevention rib may be provided to prevent the drainage flowing into the drainage manifold from the lateral branch pipe from flowing back to the adjacent lateral branch pipe. More specifically, a first backflow prevention rib 1310 is provided between the lateral branch pipe connection part 1120 at the 0 o'clock direction and the lateral branch pipe connection part 1120 at the 3 o'clock direction, a second backflow prevention rib 1320 is provided between the lateral branch pipe connection part 1120 at the 3 o'clock direction and the lateral branch pipe connection part 1120 at the 6 o'clock direction, a third backflow prevention rib 1330 is provided between the lateral branch pipe connection part 1120 at the 6 o'clock direction and the lateral branch pipe connection part 1120 at the 9 o'clock direction, and a fourth backflow prevention rib 1340 is provided between the lateral branch pipe connection part 1120 at the 9 o'clock direction and the lateral branch pipe connection part 1120 at the 0 o'clock direction. These backflow prevention ribs are basically provided so as to be located on the inner circumference (inner wall) of the upper pipe and to have a shape parallel to the axis. However, some of these backflow prevention ribs (the third backflow prevention rib 1330 and the fourth backflow prevention rib 1340 in the upper pipe 1140 for super high-rise buildings equipped with the downward deflection plate 1200) are different from the above-mentioned basic backflow prevention ribs, and the details will be described later.

[0031] The standard upper pipe 1100 used for the middle and upper floor drainage manifold 1000 and the bottom floor drainage manifold 1060 according to this embodiment includes an upward deflector plate 1240 that changes the flow of drainage at a circumferential position (here, the 3 o'clock direction) facing an inner wall (here, the 9 o'clock direction) where the lateral branch pipe connection part 1120 does not exist at a height position above the pipe axis of the lateral branch pipe connection part 1120. Here, although it is an example, this upward deflector plate 1240 has a shape of a small protrusion or a eaves-like shape that covers the upper part of the lateral branch pipe connection part 1120 in the 3 o'clock direction. And since there is no lateral branch pipe in the 9 o'clock direction facing this upward deflector plate 1240, the drainage hitting this upward deflector plate 1240 will not flow backward into the lateral branch pipe even if it flies in the 9 o'clock direction. This upward deflector plate 1240 can prevent or suppress the backflow of drainage into the lateral branch pipes connected in the other two directions (here, the 0 o'clock direction and the 6 o'clock direction), including the backflow of drainage into the lateral branch pipe connected in the 3 o'clock direction. Therefore, it is possible to prevent or suppress solids including dirt and the like flowing into the drainage manifold from the upper floors together with the drainage from flowing backward (jumping) into the lateral branch pipes.

[0032] On the other hand, the upper pipe 1140 for super high-rise buildings used in the drainage collector pipe 1040 for super high-rise buildings does not include the above-described upward deflector plate 1240, and has a downward deflector plate 1200 protruding inward from the inner wall (here, the 9 o'clock direction) where the lateral branch pipe connection part 1120 does not exist at a height position below the pipe axis of the lateral branch pipe connection part 1120 in order to change the flow of drainage. In other words, the downward deflector plate 1200 is provided at a position facing the upper surface of the downward deflector plate 1200 because the height position of the upper end, which is the starting point of the downward deflector plate 1200, is located below the pipe axis of the lateral branch pipe connection part 1120, so that all the lateral branch pipe connection parts 1120 are provided. Further, the standard lower pipe 1500 connected to the upper pipe 1140 for super high-rise buildings in the drainage collector pipe 1040 for super high-rise buildings has a turning vane 1600 protruding inward to change the flow of drainage. Thus, the drainage collector pipe 1040 for super high-rise buildings includes these downward deflector plates 1200 and turning vanes 1600. By positioning the downward deflector plate 1200 (the upper end, which is the starting point thereof) below the pipe axis of the lateral branch pipe connection part 1120 (by providing a downward deflector plate 1200 that protrudes inward from the inner wall (here, the 9 o'clock direction) where the lateral branch pipe connection part 1120 does not exist at a height position below the pipe axis of the lateral branch pipe connection part 1120 to change the flow of drainage), it is possible to prevent the drainage with a turning component imparted by the downward deflector plate 1200 from flowing backward into the lateral branch pipe, and by positioning the lower end, which is the end point of the downward deflector plate 1200, above the upper end of the turning vane 1600, the turning flow induced by the downward deflector plate 1200 is taken over by the turning vane 1600, and the turning component of the turning flow is further increased by the turning vane 1600, thereby exhibiting the effect. Since the downward deflector plate 1200 is provided at a height position below the pipe axis of the lateral branch pipe connection part 1120 in this way, it is possible to prevent or suppress the backward flow (flow in the direction against gravity) of the drainage with a turning component imparted by the downward deflector plate 1200 into the lateral branch pipe located above it. Therefore, it is possible to prevent or suppress the solid matter including dirt and the like flowing into the drainage collector pipe from the upper floor together with the drainage from flowing backward (jumping) into the lateral branch pipe.

[0033] In this case, the above-described third backflow prevention rib 1330 is positioned at the end side (lower end side) of the lower deflector plate 1200, and prevents the rebounding drainage from the lower deflector plate 1200 from flowing back into the lateral branch pipe (instead of / preventing the backflow between the lateral branch pipes / in addition to preventing the backflow between the lateral branch pipes). Further, the above-described fourth backflow prevention rib 1340 is positioned at the start side (upper end side) of the lower deflector plate 1200, and prevents the rebounding drainage from the lower deflector plate 1200 from flowing back into the lateral branch pipe (instead of / preventing the backflow between the lateral branch pipes / in addition to preventing the backflow between the lateral branch pipes).

[0034] In addition, in the jump test described later, although it is not limited to charging the test solid matter into the drainage collection pipe on the top floor together with the test water (normal temperature clear water) as the drainage, since it is obvious that the solid matter also exhibits the same behavior as the drainage (when hitting the upper deflector plate and the lower deflector plate, the drainage does not flow back into the lateral branch pipe and the solid matter does not jump), in the jump test, it does not matter whether the solid matter is charged together with water or only the solid matter is charged.

[0035] Here, the height position of the lower end of this end side backflow prevention rib (third backflow prevention rib 1330) is below the bottom of the lateral branch pipe connection portion 1120 (the meaning of being below the bottom of the lateral branch pipe connection portion 1120 does not include the case of being below the inner diameter of the lateral branch pipe), and it is preferably above the lower end of the lower deflector plate 1200. In this way, since the height position of the lower end 1330D of the end side backflow prevention rib (third backflow prevention rib 1330) is below the bottom of the lateral branch pipe connection portion 1120, the backflow from the lower deflector plate 1200 to the lateral branch pipe can be prevented, and since the height position of the lower end of the end side backflow prevention rib (third backflow prevention rib 1330) is above the lower end 1200D of the deflector plate, the space 1330S can be formed, which is preferable in terms of facilitating the formation of a swirling flow.

[0036] Furthermore, the height position of the lower end of this starting - side back - flow prevention rib (the fourth back - flow prevention rib 1340) substantially coincides with the upper end (starting point) of the lower deflector plate 1200. Since the lower end of the starting - side back - flow prevention rib (the fourth back - flow prevention rib 1340) extends to a position substantially coinciding with the height position of the upper end (starting point) of the lower deflector plate 1200 in this way, it is possible to prevent the back - flow from the lower deflector plate 1200 to the lateral branch pipe, and it is preferable in that it facilitates the formation of a swirling flow.

[0037] As described above, in the upper pipe 1140 for super - high - rise buildings, the back - flow prevention ribs having a shape parallel to the axis include the first back - flow prevention rib 1310 and the second back - flow prevention rib 1320 for preventing the drainage flowing from the lateral branch pipe into the upper drainage collecting pipe 1040 for super - high - rise buildings from flowing back to the adjacent lateral branch pipe, and the end - point - side back - flow prevention rib (the third back - flow prevention rib 1330) and the starting - point - side back - flow prevention rib (the fourth back - flow prevention rib 1340) for preventing the rebounding drainage from the lower deflector plate 1200 from flowing back to the lateral branch pipe. Four back - flow prevention ribs are provided, and a standard lower pipe 1500 is connected below this upper pipe 1140 for super - high - rise buildings, and the upper drainage collecting pipe 1040 for super - high - rise buildings according to the present embodiment is configured. The first back - flow prevention rib 1310 and the second back - flow prevention rib 1320 are provided on the inner circumference (inner wall) of the upper pipe 1140 of the upper drainage collecting pipe 1040 for super - high - rise buildings. However, at least the end - point - side back - flow prevention rib (the third back - flow prevention rib 1330) is provided at a position beside the lower deflector plate 1200 and separated from the inner circumference (inner wall) of the upper pipe 1140 for super - high - rise buildings. Also, in terms of having a shape parallel to the axis, the shapes of the four back - flow prevention ribs are similar, but other shapes may not match.

[0038] On the other hand, in the standard upper pipe 1100 used for the middle - high - rise drainage collecting pipe 1000 and the bottom - floor drainage collecting pipe 1060, the back - flow prevention ribs having a shape parallel to the axis include the first back - flow prevention rib 1310, the second back - flow prevention rib 1320, the third back - flow prevention rib 1330, and the fourth back - flow prevention rib 1340 for preventing the drainage flowing from the lateral branch pipe into the middle - high - rise drainage collecting pipe 1000 or the bottom - floor drainage collecting pipe 1060 from flowing back to the adjacent lateral branch pipe. Although not limited, any of the back - flow prevention ribs is provided on the inner circumference (inner wall) of the standard upper pipe 1100.

[0039] <Drainage collector pipe: lower pipe> The standard lower pipe 1500 used for the mid - high - rise drainage collector pipe 1000 and the super - high - rise drainage collector pipe 1040 according to this embodiment is provided with a turning vane 1600 such that the height - direction positions overlap the taper portion DR as a reduced - diameter portion. On the other hand, the lowest - floor lower pipe 1560 used for the lowest - floor drainage collector pipe 1060 according to this embodiment is provided with a reduced - diameter portion 1660 instead of the turning vane 1600. The reduced - diameter portion 1660 decelerates the inflow velocity of the drainage into the leg joint connected to the joint connection portion 1570. The inner diameter of this reduced - diameter portion 1660 is smaller than the inner diameter of the upper riser pipe connected to the lowest - floor drainage collector pipe 1060.

[0040] <Drainage collector pipe: outer layer member> Here, the outer layer members (outer layer covers) wound around these drainage collector pipes will be described with reference to FIGS. 1 to 3. The outer layer member 1700 shown in FIG. 2 is provided for the mid - high - rise drainage collector pipe 1000, the outer layer member 1701 shown in FIG. 1 is provided for the super - high - rise drainage collector pipe 1040, and the outer layer member 1703 shown in FIG. 3 is provided for the lowest - floor drainage collector pipe 1060, respectively. Members having different shapes but the same functions are denoted by the same reference numerals in these three figures, and members denoted by the same reference numerals will not be repeatedly described.

[0041] These outer layer members 1700, 1701, and 1703 correspond to the outer layer member 700 disclosed in, for example, Japanese Patent Application Laid - Open No. 2021 - 167557 filed by the applicant of the present application (however, the form and position of the thermally expandable refractory material are different). When this drainage collector pipe burns, the thermally expandable refractory material 1712 expands radially inward due to the heat, and the resin - made drainage collector pipe crushes its hollow portion to block the drainage collector pipe. As a result, the drainage piping structure using these drainage collector pipes can block the pipeline so that flames, smoke, etc. do not flow through during a fire.

[0042] As shown in FIGS. 1 to 3, these outer layer members have a three-layer structure, and from the outer surface of the drain collecting pipe, a vibration isolator 1720 formed of a vibration damping material 1714 (or a thermally expandable refractory 1712) and a refractory inorganic fiber, and a sound insulation cover 1730 are provided in this order on the outer peripheral surface of the upper pipe and / or the lower pipe of the drain collecting pipe. The innermost layer 1710 in this three-layer structure is either the thermally expandable refractory 1712 or the vibration damping material 1714.

[0043] The thermally expandable refractory 1712 located in the innermost layer is formed, for example, from 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 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 by including a butyl-based (such as butyl rubber) or asphalt-based (such as rubber asphalt, modified asphalt) material. The sound insulation cover 1730 located in the outermost layer is formed by including a rubber-based (such as EPDM (ethylene propylene diene rubber)), elastomer-based, or resin-based material (not only soft materials such as rubber but also hard PVC products are acceptable), and the vibration isolator 1720 located in the intermediate layer is composed of an aggregate (porous material) of refractory inorganic fibers.

[0044] Here, examples of the inorganic fiber include man-made mineral fibers such as glass wool, rock wool, or ceramic fiber. These are preferable not only because of their high vibration insulation performance but also because of their high sound absorption performance. Vibration caused by drainage flowing down the upper pipe or the lower pipe of the drainage collecting pipe (for example, noise and vibration generated when hitting the downward deflector plate 1200 and the swivel blade 1600) is suppressed by the vibration damping material 1714, and then further, the vibration is blocked by the vibration insulator 1720 formed of this rock wool or the like (and / or the noise associated with the vibration is absorbed), and further, the propagation of the noise associated with the vibration is blocked by the sound insulation cover 1730 formed of a rubber cover such as EPDM. Here, rock wool is a general term for those manufactured mainly from natural rock or steel slag such as blast furnace slag, and glass wool is a general term for cotton-like materials composed of glass fibers, both of which have fire resistance and heat shielding properties.

[0045] In the following, there may be cases where butyl rubber is adopted as the vibration damping material 1714, rock wool is adopted as the vibration insulator 1720, and an EPDM rubber cover is adopted as the sound insulation cover 1730, but these materials are merely examples. Further, the outer layer member 1700 (innermost layer: heat-expandable refractory 1712 or vibration damping material 1714, intermediate layer: vibration insulator 1720, outermost layer: sound insulation cover 1730) is in a ring shape having elasticity corresponding to the outer diameter of the drainage collecting pipe (more specifically, the outer diameter of the trunk portion, which is the straight pipe portion below the lateral branch pipe connection portion 1120 of the upper pipe), and it is preferable to contact the outer surface of the drainage collecting pipe via a ring elastic material (rubber ring 1900) such as EPDM in terms of ensuring water tightness. From the viewpoint of ensuring water tightness, a packing structure can also be adopted instead of the ring elastic material (rubber ring 1900). Further, when the outer layer member is adhesively joined to the outer surface of the drainage collecting pipe via the rubber ring 1900, until the time when the adhesive joining performance can be ensured has elapsed, for example, it is also preferable to use a heat shrinkable tube 1910 to prevent the positions of the rubber ring 1900 and the outer layer member from shifting from the drainage collecting pipe. For improving the assembly work efficiency, the sound insulation cover 1730 of the outer layer member and the rubber ring 1900 are made as separate members (even if they are of the same material).

[0046] <Drainage collector pipe: Thermally expandable refractory> In the innermost layer 1710 of the outer layer member having the three-layer structure as described above, a thermally expandable refractory 1712 is provided. The form of the thermally expandable refractory 1712 is not limited to any of refractory putty, refractory sheet, refractory tape, etc.

[0047] As shown in FIG. 2, the height position of this thermally expandable refractory 1712 is preferably above the upper end (the upper end of the lower pipe receiving port) of the standard lower pipe 1500 used for the middle and high-rise drainage collector pipe 1000 and below the upper end of the outer layer member 1700 (the upper end of the sound insulation cover 1730). As shown in FIG. 1, it is preferably above the upper end (the upper end of the lower pipe receiving port) of the standard lower pipe 1500 used for the super high-rise drainage collector pipe 1040 and below the upper end of the outer layer member 1701 (the upper end of the sound insulation cover 1730). As shown in FIG. 3, it is preferably above the upper end (the upper end of the lower pipe receiving port) of the lowest floor lower pipe 1560 used for the lowest floor drainage collector pipe 1060 and below the upper end of the outer layer member 1703 (the upper end of the sound insulation cover 1730).

[0048] Note that with respect to the height-direction positional relationship between the drainage collector pipe and the floor slab, it is preferable that the upper end of the thermally expandable refractory 1712 is below the upper surface of the floor slab and the lower end of the thermally expandable refractory 1712 is above the lower surface of the floor slab, and the lower end of the thermally expandable refractory 1712 may be below the lower surface of the floor slab.

[0049] <Method for testing the jumping-in of solid matter from the drainage collector pipe to the lateral branch pipe> With reference to FIG. 4, the method for testing the jumping-in of solid matter from the three types of drainage collector pipes having the above structure to the lateral branch pipe will be described in detail.

[0050] The test method according to this embodiment is a method for testing the jumping-in of test solids from the main drainage pipe to the branch pipes according to the above-described embodiment, and is a test method capable of evaluating the jumping-in suppression performance in the main drainage pipe. This test method includes an installation step of installing the main drainage pipes on each floor of the fifth floor or higher, a preparation step of preparing test solids in a substantially spherical shape with a diameter of φ4 to φ30 mm formed of a low-rebound material having a rebound coefficient of 0.5 or less, and a confirmation step of dropping 1000 or more test solids from the top floor and visually checking whether or not jumping-in occurs from the main drainage pipes installed on each floor to the branch pipes.

[0051] Further, in this test method, based on the result visually confirmed in the confirmation step, (number of jump-ins / number of tests) × 100 is defined as the jump-in rate A (%), and the jump-in distance B (mm) to the branch pipe with reference to the end face of the branch pipe receiving member. The test method can further include a determination step of determining pass / fail based on whether A is less than (0.04 (%) × number of main drainage pipes to be tested excluding the top floor) or B is less than 300 mm.

[0052] Hereinafter, each step will be described in detail. · Installation step Install the medium-rise main drainage pipe 1000 or the super-high-rise main drainage pipe 1040 on each floor other than the bottom floor of the drainage test tower, and install the bottom-floor main drainage pipe 1060 on the bottom floor. Here, it is assumed to be a 15-story building. That is, install 14 medium-rise main drainage pipes 1000 or 14 super-high-rise main drainage pipes 1040 on 14 floors other than the bottom floor, and install 1 bottom-floor main drainage pipe 1060 on the bottom floor. The branch pipe connection parts 1120 of each main drainage pipe exist in three directions other than the 9 o'clock direction, and connect three transparent pipes with a nominal diameter of 75 and a length of 500 mm as branch pipes to each floor. In addition, a toilet is connected to the branch pipe of the main drainage pipe on the 15th floor, which is the top floor. Further, a leg joint with a main horizontal pipe connected is connected to the lower pipe 1560 of the bottom-floor main drainage pipe 1060 on the first floor, which is the bottom floor. · Preparation step Prepare a substantially spherical test solid object with a diameter of φ4 to φ30 mm, formed of a low-rebound material having a coefficient of restitution of 0.5 or less. More specifically, it is as follows. The coefficient of restitution is, precisely, in the collision of two objects, the ratio of the speed at which they move away from each other after the collision to the speed at which they approach each other before the collision, and is also called the bounce coefficient. It is often represented by the letter e and is a dimensionless number in the range of 0 ≦ e ≦ 1. Here, since it is difficult to directly specify the coefficient of restitution, the test solid object is freely dropped from a certain height, and it is indirectly specified in the form of how high the test solid object rises after colliding with the floor surface. This is because when an object freely falls from a height H(F) and bounces up to a height H(S) after colliding with the floor surface, if air resistance is ignored, the coefficient of restitution e between the test solid object and the floor surface can be obtained by SQR((H(S) / H(F))), so this formula is adopted. Therefore, the test solid object is formed using a low-rebound material that rises no more than 250 mm when freely dropped from a height of 1 m onto the floor surface. Also, the shape of the test solid object is a substantially spherical shape with a diameter of φ4 to φ30 mm, and it may be in a bale shape in addition to a spherical shape. Here, a spherical shape is adopted, and substantially spherical test solid objects with sizes of φ5 mm, φ10 mm, and φ15 mm are prepared. ·Confirmation step Drop 1000 or more test solid objects from the upper riser connection part 1110 (or the riser receiving member 1112 with a rubber ring 1114) of the drainage collection pipe installed on the top floor (more specifically, the drainage collection pipe 1000 for mid-rise buildings or the drainage collection pipe 1040 for super high-rise buildings). Then, visually check whether there is any occurrence of jumping from the drainage collection pipe installed on each floor to the lateral branch pipe. At this time, as shown in FIGS. 4(A) and 4(B), the number of test solid objects (jumping-in number) that jumped into the three lateral branch pipes from the drainage collection pipes installed on each of the 14 floors other than the top floor, and the jumping-in distance B (mm) to the lateral branch pipe based on the end face of the lateral branch pipe receiving member 1122 are measured. Note that the test solid object may be dropped from the upper riser connection part 1110 (or the riser receiving member 1112 with a rubber ring 1114) together with water (fresh water at room temperature), or the test solid object may be introduced together with water (fresh water at room temperature) from the toilet on the top floor (however, as will be described later, the drainage collection pipe on the top floor is not subject to the test). ·Judgment step Based on the result visually confirmed in the above confirmation step, the diving rate A (%) is calculated as (number of dives / number of tests) × 100, and the diving distance B (mm) into the lateral branch pipe with reference to the end face of the lateral branch pipe receiving member 1122. Whether it is qualified or not is determined by whether A is less than (0.04 (%) × the number of drain collection pipes to be tested excluding the top floor) or B is less than 300 mm. Here, the reason for multiplying the pass / fail judgment value of the diving rate A (%) by "the number of drain collection pipes to be tested excluding the top floor" is that the drain collection pipe on the top floor is not a test target because only test solids are put in and no diving into the lateral branch pipe occurs. In addition, in this test method, it is only stipulated to conduct the test on the 5th floor or above (it is the 15th floor this time, but any floor above the 5th floor is acceptable). After setting the diving rate per floor to less than 0.04%, it is multiplied by the number of drain collection pipes to be tested (= the number of drain collection pipes installed in the installation step - 1).

[0053] The results of such a diving test are shown in FIGS. 4(C) and 4(D) as examples, and in FIG. 4(E) as a comparative example. Here, Example 1 shown in FIG. 4(C) which is the result of the diving test installed the mid- to high-rise drain collection pipe 1000 according to this embodiment from the 2nd floor to the 15th floor and the lowest floor drain collection pipe 1060 on the 1st floor and conducted the diving test. Example 2 shown in FIG. 4(D) which is the result of the diving test installed the super high-rise drain collection pipe 1040 according to this embodiment from the 2nd floor to the 15th floor and the lowest floor drain collection pipe 1060 on the 1st floor and conducted the diving test. The comparative example shown in FIG. 4(E) which is the result of the diving test installed (a three-branch) drain collection pipe with a protrusion protruding from the inner wall without the above-mentioned upper deflector plate 1240 and lower deflector plate 1200 and protruding inward from the inner periphery at a height position above the pipe axis of the lateral branch pipe connection part on the upper pipe from the 2nd floor to the 15th floor, and installed (a three-branch) drain collection pipe with a protrusion at a position above the upper end of the lateral branch pipe connection part and facing the lateral branch pipe without the above-mentioned upper deflector plate 1240 and lower deflector plate 1200 on the upper pipe on the 1st floor and conducted the diving test.

[0054] In FIG. 4(C), since the upper deflector plate 1240, which is a mechanism for exhibiting the effect of preventing jumping-in, is the same for the middle and high-rise drainage manifold 1000 and the lowest floor drainage manifold 1060, the middle floors (here, the 2nd to 14th floors) and the lowest floor (the 1st floor) are not distinguished and represented.

[0055] The pass / fail judgment value (threshold value) used in the judgment step is such that the pass / fail judgment value of the jumping-in rate A (%) is less than 0.56 (%) (=0.04 (%)×14)≒0.5%, and the pass / fail judgment value of the jumping-in distance B (mm) to the lateral branch pipe with respect to the end face of the lateral branch pipe receiving member 1122 is less than 300 (mm). In the embodiments shown in FIGS. 4(C) and 4(D), both the jumping-in rate A (%) and the jumping-in distance B (mm) have passed all three types of test solids with different sizes. On the other hand, in the comparative example shown in FIG. 4(E), for the test solid of φ5 (mm), both the jumping-in rate A (%) and the jumping-in distance B (mm) fail, and for the test solids of φ10 (mm) and φ15 (mm), the jumping-in distance B (mm) fails. The reasons for the differences in the jumping-in test results between the embodiments and the comparative example will be explained below.

[0056] The standard upper pipe 1100 commonly used in the middle and high-rise drainage manifold 1000 and the lowest floor drainage manifold 1060 according to the present embodiment includes an upper deflector plate 1240 that changes the flow of drainage at a circumferential direction position (here, the 3 o'clock direction) facing an inner wall (here, the 9 o'clock direction) where the lateral branch pipe connection portion 1120 does not exist at a height position above the pipe axis of the lateral branch pipe connection portion 1120. Since there is no lateral branch pipe in the 9 o'clock direction facing this upper deflector plate 1240, the drainage hitting this upper deflector plate 1240 will not flow backward into the lateral branch pipe even if it flies in the 9 o'clock direction. Moreover, this upper deflector plate 1240 can prevent or suppress the backward flow of drainage into the lateral branch pipes connected in the other two directions (here, the 0 o'clock direction and the 6 o'clock direction), including the backward flow of drainage into the lateral branch pipe connected in the 3 o'clock direction. Therefore, it can prevent or suppress the backward flow (jumping-in) of solids including dirt and the like flowing into the drainage manifold from the upper floors together with the drainage into the lateral branch pipe.

[0057] In addition, the upper pipe 1140 for super high-rise buildings used in the drainage manifold 1040 for super high-rise buildings according to the present embodiment is provided with a downward deflector plate 1200 that protrudes inward from the inner wall (here, the 9 o'clock direction) where the lateral branch pipe connection portion 1120 does not exist at a height position below the pipe axis of the lateral branch pipe connection portion 1120 to change the flow of drainage. Since the downward deflector plate 1200 is provided at a height position below the pipe axis of the lateral branch pipe connection portion 1120 in this way, it is possible to prevent or suppress the backflow of the drainage with a swirling component applied by the downward deflector plate 1200 into the lateral branch pipe located above it. For this reason, it is possible to prevent or suppress solids including dirt and the like flowing into the drainage manifold from the upper floors together with the drainage from flowing back (jumping) into the lateral branch pipe.

[0058] As described above, in the upper pipe of the drainage manifold according to the present embodiment, an upward deflector plate 1240 (standard upper pipe 1100) that changes the flow of drainage is provided at a circumferential position facing the inner wall where the lateral branch pipe connection portion 1120 does not exist at a height position above the pipe axis of the lateral branch pipe connection portion 1120, or a downward deflector plate 1200 (upper pipe 1140 for super high-rise buildings) that protrudes inward from the inner wall where the lateral branch pipe connection portion 1120 does not exist at a height position below the pipe axis of the lateral branch pipe connection portion 1120 to change the flow of drainage. Therefore, in the above-described jumping test method, taking (number of jumps / number of tests) × 100 calculated from the results visually confirmed as the jumping rate A (%) and the jumping distance B (mm) into the lateral branch pipe with respect to the end face of the lateral branch pipe receiving member as the reference, it satisfies less than the threshold value (pass / fail determination value) for the jumping rate A (%), which is (0.04 (%)) × the number of drainage manifolds to be tested excluding the top floor), or less than the threshold value (pass / fail determination value) for the jumping distance B (mm), which is 300 mm. The drainage manifold (itself) that satisfies such a jumping rate A (%) or jumping distance B (mm) being less than the above-described threshold value is the invention according to the present application.

[0059] As described above, according to the drainage collecting pipe according to the present embodiment, it is possible to preferably provide a drainage collecting pipe that can preferably suppress the drainage flowing in the riser pipe from flowing together with solid substances including dirt and jumping into the lateral branch pipe of the drainage collecting pipe. Further, it is possible to provide a method for testing the jumping of test solid substances from the drainage collecting pipe to the lateral branch pipe, which can evaluate the jumping suppression performance in the drainage collecting pipe that preferably suppresses such jumping into the lateral branch pipe.

[0060] It should be noted that the embodiments disclosed this time should be considered as illustrative in all respects and not restrictive. The scope of the present invention is shown not by the above description but by the scope of claims, and it is intended that all modifications within the meaning and scope equivalent to the scope of claims are included.

Industrial Applicability

[0061] The present invention is preferably applicable to a resin drainage collecting pipe provided through the floor slab of a building, and can preferably suppress solid substances including dirt from flowing together with the drainage flowing in the riser pipe and jumping into the lateral branch pipe of the drainage collecting pipe, and a method for testing the jumping of test solid substances from the drainage collecting pipe to the lateral branch pipe, which can evaluate the jumping suppression performance in the drainage collecting pipe that preferably suppresses such jumping into the lateral branch pipe, is particularly preferred.

Explanation of Reference Numerals

[0062] 1000 Drainage collecting pipe for mid - to high - rise buildings 1040 Drainage collecting pipe for super - high - rise buildings 1060 Drainage collecting pipe for the lowest floor 1100 Upper pipe (standard upper pipe) 1140 Upper pipe (upper pipe for super - high - rise buildings) 1200 Lower deflector 1240 Upper deflector 1500 Lower pipe (standard lower pipe) 1560 Lower pipe (lower pipe for the lowest floor) 1600 Swirling vane 1700 Outer layer member

Claims

1. A resin drainage manifold disposed in a through-hole of a building floor slab, wherein the drainage manifold includes an upper pipe protruding above the floor slab and a lower pipe connected to a lower pipe for discharging drainage, and the longitudinal pipe axis of the upper pipe and the longitudinal pipe axis of the lower pipe coincide to form the axis of the drainage manifold, the upper pipe includes an upper riser connection portion for connecting an upper riser for draining water from an upper floor and up to three lateral branch pipe connection portions for connecting lateral branch pipes above the floor slab, the lower pipe includes a lower pipe connection portion for connecting the lower pipe and a reduced diameter portion provided on the upstream side of the lower pipe connection portion, the upper pipe is provided with an upper flow deflector plate for changing the flow of drainage at a circumferential position facing an inner wall where there is no lateral branch pipe connection portion at a height position above the pipe axis of the lateral branch pipe connection portion, or a lower flow deflector plate protruding from the inner wall where there is no lateral branch pipe connection portion at a height position below the pipe axis of the lateral branch pipe connection portion toward the inner circumference to change the flow of drainage. The drainage manifold is characterized by this.

2. In the following <jumping-in test method>, taking (number of jumps / number of tests) × 100 calculated based on the results visually confirmed as the jumping-in rate A (%), and the jumping-in distance B (mm) to the lateral branch pipe with reference to the end face of the lateral branch pipe receiving member, the drainage manifold according to claim 1, characterized in that the A is less than (0.04 (%) × number of drainage manifolds to be tested excluding the top floor), or the B is less than 300 mm. <Jumping-in test method> - Install the drainage manifold on each floor of a 5-story or higher building, drop 1000 or more test solids from the top floor, and visually check whether jumping-in occurs from the drainage manifold installed on each floor to the lateral branch pipe. - The test solids are substantially spherical with a diameter of φ4 to φ30 mm and are formed of a low-rebound material with a coefficient of restitution of 0.5 or less.

3. A method for testing the jumping-in of test solids from a resin drainage manifold disposed in a through-hole of a building floor slab to a lateral branch pipe, wherein the drainage manifold includes an upper pipe protruding above the floor slab and a lower pipe connected to a lower pipe for discharging drainage, and the longitudinal pipe axis of the upper pipe and the longitudinal pipe axis of the lower pipe coincide to form the axis of the drainage manifold, the upper pipe includes an upper riser connection portion for connecting an upper riser for draining water from an upper floor and up to three lateral branch pipe connection portions for connecting lateral branch pipes above the floor slab, The lower pipe includes a lower pipe connection portion that connects the lower piping, and a reduced diameter portion provided on the upstream side of the lower pipe connection portion. The test method is as follows: installing the drainage collecting pipe on each floor of the fifth floor or above; preparing a substantially spherical test solid formed of a low-rebound material having a rebound coefficient of 0.5 or less and a diameter of φ4 to φ30 mm; dropping 1000 or more of the test solids from the top floor and visually checking whether or not jumping from the drainage collecting pipe installed on each floor into the lateral branch pipe occurs. The test method is characterized by including this step.

4. Based on the result of visual inspection, taking (number of jumps / number of tests) × 100 as the jump rate A (%) and the jump distance B (mm) into the lateral branch pipe with reference to the end face of the lateral branch pipe receiving member, the determination step of determining pass / fail according to whether A is less than (0.04 (%) × number of drainage collecting pipes to be tested excluding the top floor) or B is less than 300 mm is further included. The test method according to claim 3 is characterized by this.

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