Drainage manifold

Abstract

To provide a drainage manifold comprising up to three horizontal branch pipe connection parts, wherein drainage capacity from at least one direction among three directions is higher.SOLUTION: A resin-made mid-to-high-rise drainage manifold 1000 comprises an upper pipe 1100 protruding above a floor slab, and a lower pipe 1500 connected to a downpipe for draining wastewater to a lower floor. The upper pipe 1100 comprises an uppipe connection part 1110 for connecting an uppipe to introduce wastewater from an upper floor, and up to three horizontal branch pipe connection parts 1120 for connecting horizontal branch pipes. The lower pipe 1500 comprises a reduced-diameter part and a swirl vane 1600 as a downward deflection plate to alter the flow of wastewater. When the horizontal branch pipes are connected in three directions, the drainage capacity is higher in two specific directions (here, the 12 o'clock and 3 o'clock directions, which do not oppose the 12 o'clock position where the swirl vane 1600 is located) than in the other direction (here, the 6 o'clock direction opposing the 12 o'clock position where the swirl vane 1600 is located).SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a resin drainage collector pipe disposed in a through-hole of a floor slab of a building, including an upper pipe protruding above the floor slab and a lower pipe connected to a lower vertical pipe for draining water to a lower floor. The upper pipe includes an upper vertical pipe connection portion for connecting an upper vertical pipe for draining water from an upper floor and up to three horizontal branch pipe connection portions for connecting horizontal branch pipes above the floor slab. The lower pipe includes a lower vertical pipe connection portion for connecting the lower vertical pipe, a reduced diameter portion provided on the upstream side of the lower vertical pipe connection portion, and a downward deflecting plate provided on the lower pipe for changing the flow of drainage (in some cases, the turning vane may be included in the deflecting plate, and this parenthetical note will not be repeated hereinafter). The drainage capacity confirmed one by one in three directions when connecting horizontal branch pipes in three directions is such that the drainage capacity in a specific one direction is higher than the other two directions, or the drainage capacity in specific two directions is higher than the other one direction (exhibiting a high drainage capacity under specific conditions).

Background Art

[0002] In apartment buildings and office buildings, water supply facilities and drainage facilities are provided. Among these, the drainage facilities typically include a vertical pipe (riser pipe, upper riser pipe, lower riser pipe) that penetrates vertically through each floor of the building, a horizontal pipe (horizontal branch pipe, branch pipe) installed within each floor, and a drainage pipe joint (also referred to as a drainage collector pipe, drainage pipe joint, or drainage collection joint) that connects these.

[0003] And such a drainage pipe joint includes a pipe body (main body portion, upper pipe) disposed in a through-hole of the floor slab when constructed in a building. The main body portion has an upper riser pipe connection portion connectable to the upstream upper riser pipe at the upper end, a horizontal branch pipe connection portion connectable to the horizontal branch pipe on the side, and a lower pipe connection portion connectable to a downstream piping member at the lower end. Many such drainage pipe joints are provided with a portion for changing the flow of drainage within the drainage pipe joint (for example, projections on the inner peripheral surface such as turning vanes, straightening vanes, vane members, deflecting plates, etc.). Also, such a drainage pipe joint formed of one or more resin injection molded products is widely known.

[0004] As such a drain pipe joint, there is a pipe joint disclosed in Japanese Patent Application Laid-Open No. 2021-046715 (Patent Document 1). The pipe joint disclosed in this Patent Document 1 includes a joint body formed in a cylindrical shape, an end portion connected to a side surface of the joint body, an opening formed in the end portion communicating with the inside of the joint body, a side joint portion to which a horizontal pipe portion is connected, and an annular body inserted into the inside of the joint body and extending so as to project from an inner peripheral surface of the joint body, provided so as to extend in an axial direction of the joint body, and a backflow prevention portion formed at a desired position in the side joint portion. Preferably, a swirling vane is provided which extends so as to project in the axial direction from the annular body and swirls the flow of water passing through the inside of the joint body (Claims 1 and 5 of Patent Document 1).

[0005] And, in the pipe joint disclosed in this Patent Document 1, as shown in FIG. 2 of Patent Document 1, as the swirling vanes, a first swirling vane 45 is provided in an upper part 34 of the main body, a second swirling vane 47 is provided in an intermediate part 35 of the main body, and a third swirling vane 49 projecting radially inward of the lower part 36 of the main body is provided on an inner peripheral surface of a lower end portion of the lower part 36 of the main body, respectively.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] By the way, in the pipe joint disclosed in Patent Document 1, when draining water from a lateral branch pipe facing a lower pipe swirling vane (the third swirling vane 49 in Patent Document 1) provided at the lower end portion of the lower part of the main body (reduced diameter portion), the drainage capacity may decrease. The reason is that although the diameter of the lower pipe is reduced from the body diameter to the vertical pipe diameter (although the flow becomes difficult because the drain pipe diameter becomes smaller), it is desired to drain the water smoothly. However, the lateral branch pipe (6 o'clock side When drained from the (direction), the drainage from the 6 o'clock direction hits the lower pipe swivel blades, disturbing the flow of the drainage and potentially blocking the air passage, leading to a decrease in drainage capacity. This is related to the structure of the drainage manifold (especially the structure of the lower pipe), which leads to the ability to realize a drainage manifold with a higher drainage capacity in a particular direction depending on the direction of the lateral branch pipe.

[0008] The present invention is in view of the above-described decrease in drainage capacity from a specific lateral branch pipe. The object is to provide a resin-made drainage manifold disposed in a through-hole of a building floor slab, having at most three lateral branch pipe connection parts for connecting lateral branch pipes above the floor slab, and a downward deflector plate provided in the lower pipe to change the flow of drainage. When the lateral branch pipes are connected in three directions, the drainage capacity checked one direction at a time is such that a specific one direction is higher than the other two directions, or a specific two directions are higher than the other one direction (exhibiting a high drainage capacity under specific conditions).

Means for Solving the Problem

[0009] To achieve the above object, the drainage manifold according to the present invention takes the following technical means.

[0010] The drainage manifold according to the present invention is a resin-made drainage manifold disposed in a through-hole of a building floor slab. The drainage manifold includes an upper pipe protruding above the floor slab and a lower pipe connected to a lower vertical pipe for draining water to a lower floor. The longitudinal axis of the upper pipe and the longitudinal axis of the lower pipe coincide to form the axis of the drainage manifold. The upper pipe includes an upper vertical pipe connection part for connecting an upper vertical pipe for draining water from an upper floor and at most three lateral branch pipe connection parts for connecting lateral branch pipes above the floor slab. The lower pipe includes a lower vertical pipe connection part for connecting the lower vertical pipe, a reduced diameter part provided on the upstream side of the lower vertical pipe connection part, and a downward deflector plate provided in the lower pipe to change the flow of drainage. The drainage capacity checked one direction at a time in the drainage manifold with the lateral branch pipes connected in three directions is characterized in that a specific one direction is higher than the other two directions, or a specific two directions are higher than the other one direction.

[0011] Preferably, the upper pipe can be configured to further include an upward deflector plate that protrudes inward from the inner wall where the lateral branch pipe connection portion does not exist at the height position of the lateral branch pipe connection portion to change the flow of drainage.

[0012] More preferably, the direction with high drainage capacity can be configured to be 10% or more higher than the direction with low drainage capacity.

[0013] More preferably, the lateral branch pipes can be configured to be connected only in the direction with high drainage capacity.

[0014] More preferably, the lateral branch pipes can be configured not to be connected in the direction with low drainage capacity.

Advantages of the Invention

[0015] According to the present invention, there is provided a resin drainage manifold disposed in a through hole of a building floor slab, having at most three lateral branch pipe connection portions for connecting lateral branch pipes above the floor slab, and a downward deflector plate for changing the flow of drainage provided in the lower pipe. When the lateral branch pipes are connected in three directions, it is possible to provide a drainage manifold in which the drainage capacity confirmed one by one in each direction is such that a specific one direction is higher than the other two directions, or a specific two directions are higher than the other one direction (exhibiting high drainage capacity under specific conditions).

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Embodiments for Carrying Out the Invention

[0017] Hereinafter, the drain collecting pipe according to the embodiment of the present invention will be described in detail with reference to FIGS. 1 to 2. In the following description, the outer peripheral surface, the outer surface, the outside, the outer layer side, the outer peripheral side, the outside, the inner layer side, the inner peripheral side, the inside, the thermally expandable refractory, the refractory, and the thermal expansion material may not be clearly distinguished. Also, in the cross-sectional view, when different members are not clearly distinguished by the type of hatching there may be cases where the same member is marked with different hatchings. Also, for ease of understanding of the present invention, in the top view, the direction of the horizontal branch pipe may be specified using 0 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock with the hour hand of a clock. Also, in the figure, the reference signs (consisting of a number + (optionally) an alphabet) attached to the dashed-dotted line together with the arrow indication indicate that the number is the figure number and the alphabet is the branch number (A, B, C, etc.) in that figure, respectively, and a cross-sectional view is shown in the figure specified by that reference sign. Note that the drain collecting pipe according to the present embodiment described below is not limited to either a drain collecting pipe for mid- to high-rise buildings or a drain collecting pipe for super high-rise buildings unless otherwise specified. Also, when simply described as a drain collecting pipe, an upper pipe, and a lower pipe (regardless of the presence or absence of reference signs), it means a drain collecting pipe, an upper pipe, and a lower pipe that are not limited to either mid- to high-rise or super high-rise. Also, the upper pipe used for the drain collecting pipe for mid- to high-rise buildings may be described as a standard upper pipe, and the lower pipe used for the drain collecting pipe for mid- to high-rise buildings and the drain collecting pipe for super high-rise buildings may be described as a standard lower pipe.

[0018] <Combination of the upper pipe and the lower pipe in the drain collecting pipe> With reference to FIG. 1 showing the drain collecting pipe 1000 for mid- to high-rise buildings and FIG. 2 showing the drain collecting pipe 1040 for super high-rise buildings, the drain collecting pipe according to the present embodiment will be described.

[0019] First, the combination of the drainage collector pipes according to this embodiment will be described. Among these two figures, the mid- to high-rise drainage collector pipe 1000 shown in FIG. 1 includes a standard upper pipe 1100 without an upper deflector plate 1200, and a standard lower pipe 1500 having a turning vane 1600 as a lower deflector plate connected below the standard upper pipe 1100. Also, among these two figures, the super high-rise drainage collector pipe 1040 shown in FIG. 2 includes a super high-rise upper pipe 1140 with an upper deflector plate 1200, and a standard lower pipe 1500 having a turning vane 1600 as a lower deflector plate connected below the super high-rise upper pipe 1140. Note that the present invention is not limited to such a combination. For example, an extension pipe or a branched extension pipe (a trunk pipe for multi-stage lower branches) may be provided between the upper pipe and the lower pipe.

[0020] These two types of (mid- to high-rise drainage collector pipe 1000, super high-rise drainage collector pipe 1040) drainage collector pipes will be described. Among these, the mid- to high-rise drainage collector pipe 1000 is a resin-made drainage collector pipe arranged in the through-hole of the building floor slab. As shown in FIG. 1, the mid- to high-rise drainage collector pipe 1000 includes a standard upper pipe 1100 protruding above the floor slab and a standard lower pipe 1500 connected to a lower riser that discharges drainage to the lower floor. The longitudinal pipe axis of the standard upper pipe 1100 and the longitudinal pipe axis of the standard lower pipe 1500 coincide to form the axis of the mid- to high-rise drainage collector pipe 1000. The standard upper pipe 1100 includes an upper riser connection part 1110 for connecting an upper riser that allows drainage to flow in from the upper floor, and up to three horizontal branch pipe connection parts 1120 for connecting horizontal branch pipes above the floor slab. The standard lower pipe 1500 includes a lower riser connection part 1510 for connecting a lower riser, a reduced diameter part DR provided on the upstream side of the lower riser connection part 1510, and a turning vane 1600 provided on the standard lower pipe 1500 as a lower deflector plate for changing the flow of drainage. The turning vane 1600 is provided protruding from the inner wall to the inner circumference at a height position overlapping the reduced diameter part DR in the standard lower pipe 1500 to change the flow of drainage.

[0021] For the middle- and high-rise drainage manifold 1000 having such a configuration, as shown in FIG. 2, the ultra-high-rise drainage manifold 1040 has a lower pipe that is common to the standard lower pipe 1500, while the upper pipe is an ultra-high-rise upper pipe 1140 that is not the standard upper pipe 1100. This ultra-high-rise upper pipe 1140 protrudes above the floor slab, and the longitudinal pipe axis of the standard upper pipe 1100 and the longitudinal pipe axis of the ultra-high-rise upper pipe 1140 coincide to form the axis core of the ultra-high-rise drainage manifold 1040. And the ultra-high-rise upper pipe 1140 includes an upper riser connection part 1110 for connecting an upper riser that allows drainage to flow in from the upper floor, and up to three lateral branch pipe connection parts 1120 for connecting lateral branch pipes above the floor slab. In addition to this, at the height position of the lateral branch pipe connection part 1120, an upward deflector plate 1200 is further provided that protrudes from the inner wall where the lateral branch pipe connection part 1120 does not exist (at the 9 o'clock direction) to the inner circumference to change the flow of drainage. The position of the upward deflector plate 1200 in the height direction is preferably below the pipe axis of the lateral branch pipe connection part 1120 so that the drainage hitting the upward deflector plate 1200 does not flow back into the lateral branch pipe.

[0022] Note that the lower riser connection part 1510 may be provided separately from the standard lower pipe 1500 as shown in FIG. 1, or may be integrally provided like the standard lower pipe 1500 used in the ultra-high-rise drainage manifold 1040 shown in FIG. 2. Either way is acceptable (since this is the only difference, the reference numeral (here, the reference numeral 1500 of the standard lower pipe 1500) is not distinguished).

[0023] Although it is an example, a riser socket 1112 and a rubber ring 1114 are provided at the upper riser connection part 1110, and through these, the upper riser and the drainage manifold are connected. A lateral branch pipe socket 1122 and a rubber ring 1124 are provided at the lateral branch pipe connection part 1120, and through these, the lateral branch pipe and the drainage manifold are connected.

[0024] In the drain collecting pipe according to this embodiment, as shown in FIGS. 1 and 2, in the top view of the drain collecting pipe looking from above, lateral branch pipe connection parts 1120 are provided in the directions of 0 o'clock, 3 o'clock, and 6 o'clock, and no lateral branch pipe connection part 1120 is provided in the direction of 9 o'clock, and a maximum of three lateral branch pipe connection parts 1120 are provided. Also, like this drain collecting pipe, the lateral branch pipe connection parts 1120 are provided at three locations other than 9 o'clock, and the lateral branch pipe connection parts 1120 in the direction where the lateral branch pipe is not connected are plugged with a plug (this plug is plugged through the lateral branch pipe receiving port 1122 and the rubber ring 1124), and (in the direction where high drainage capacity is not exhibited under specific conditions as described later), the lateral branch pipe may not be connected.

[0025] <Upper pipe> In the upper pipe constituting the drain collecting pipe according to this embodiment, a deflector plate 1240 for decelerating the flowing-down drain or cutting the water film formed by the drain may be provided, or a backflow prevention rib 1310 for preventing the drain flowing into the drain collecting pipe from the lateral branch pipe from flowing back to the adjacent lateral branch pipe may be provided. The backflow prevention rib 1310 is provided so as to be located on the inner circumference (inner wall) of the standard upper pipe 1100 of the drain collecting pipe 1000 for medium and high-rise buildings and to have a shape parallel to the axis.

[0026] Here, the upper pipe 1140 for super high-rise buildings that constitutes the drainage manifold 1040 for super high-rise buildings is provided with an upward deflector plate 1200 protruding inwardly to change the flow of drainage in a direction (here, the 9 o'clock direction) without a lateral branch pipe connection portion 1120. Further, the standard lower pipe 1500 connected to the upper pipe 1140 for super high-rise buildings in this drainage manifold 1040 for super high-rise buildings is provided with a turning vane 1600 as a downward deflector plate that protrudes inwardly to change the flow of drainage. Thus, the drainage manifold 1040 for super high-rise buildings is provided with these upward deflector plate 1200 and turning vane 1600. By positioning the upper end, which is the starting point of this upward deflector plate 1200, below the pipe axis of the lateral branch pipe connection portion 1120, (as described above, it is possible to prevent the drainage hitting the upward deflector plate 1200 from flowing back into the lateral branch pipe, and) it is possible to prevent the drainage with a turning component imparted by the upward deflector plate 1200 from flowing back into the lateral branch pipe. By positioning the lower end, which is the ending point of the upward deflector plate 1200, above the upper end of the turning vane 1600, the swirling flow induced by the upward deflector plate 1200 is taken over by the turning vane 1600, and the turning vane 1600 further increases the turning component in the swirling flow, thereby exhibiting the operational effect.

[0027] Note that this upward deflector plate 1200 is located in the body portion of the drainage manifold 1040 for super high-rise buildings and is not provided in the reduced diameter portion DR like the turning vane 1600 as the downward deflector plate. Therefore, the influence on the point of exhibiting high drainage capacity under specific conditions, which is a major technical feature of the present invention described later, is small.

[0028] Thus, in the upper pipe 1140 for super high-rise buildings, the backflow prevention rib 1310 is provided so as to be located on the inner circumference (inner wall) and have a shape parallel to the axis, preventing the drainage flowing into the drainage manifold 1040 for super high-rise buildings from the lateral branch pipe from flowing back into the adjacent lateral branch pipe, or is provided so as to be located on the starting end side and the ending end side of the upward deflector plate 1200 and have a shape parallel to the axis, preventing the rebounding drainage from the upward deflector plate 1200 from flowing back into the lateral branch pipe. The position and shape are set accordingly.

[0029] <Lower pipe> Among the standard lower pipes 1500 that make up the drainage collecting pipe according to this embodiment, the standard lower pipe 1500 is provided with the turning blades 1600 as the downward deflecting plate described above. The standard lower pipe 1500 is provided with a reduced diameter portion DR that reduces in diameter from the body diameter to the vertical pipe diameter. At a height position overlapping with the reduced diameter portion DR, turning blades 1600 are provided protruding from the inner wall (in the 0 o'clock direction) to the inner circumference to change the flow of drainage, serving as the downward deflecting plate. It is provided with turning blades 1600.

[0030] Note that due to the turning blades 1600, which are the downward deflecting plates, being provided protruding from the inner wall (in the 0 o'clock direction) to the inner circumference at a height position overlapping with the reduced diameter portion DR in the standard lower pipe 1500, the point of exhibiting high drainage capacity under specific conditions, which is a major feature of the drainage collecting pipe according to the present invention, will be described later.

[0031] <Outer layer member> Here, the outer layer members (outer layer covers) wound around these drainage collecting pipes will be described with reference to FIGS. 1 and 2. The outer layer member 1700 shown in FIG. 1 is provided for the medium and high-rise drainage collecting pipe 1000, and the outer layer member 1700 shown in FIG. 2 is provided for the super high-rise drainage collecting pipe 1040. Members with different shapes but the same functions are given the same reference numerals in these two figures, and the members with the same reference numerals will not be repeatedly described.

[0032] These outer layer members 1700 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 are different). When this drainage collecting pipe burns, the thermally expandable refractory 1712 expands radially inward due to the heat, and the resin-made drainage collecting pipe crushes its hollow portion to block the drainage collecting pipe. As a result, the drainage piping structure using these drainage collecting pipes can block the pipeline so that flames, smoke, etc. do not flow through during a fire.

[0033] As shown in FIGS. 1 and 2, these outer layer members have a three-layer structure, and from the outer surface of the drain collecting pipe, a vibration damping material 1714 (or a thermally expandable refractory 1712), a vibration insulator 1720 formed of a refractory inorganic fiber, and a sound insulation cover 1730 are provided in this order on the outer peripheral surfaces 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 a thermally expandable refractory 1712 or a vibration damping material 1714.

[0034] The thermally expandable refractory 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 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 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 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 is acceptable), and the vibration insulator 1720 located in the intermediate layer is composed of an aggregate of refractory inorganic fibers (a porous material).

[0035] Here, examples of the inorganic fibers include man-made mineral fibers, such as glass wool, rock wool, or ceramic fibers. 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 upper deflector plate 1200 and the swirling blades 1600 as the lower deflector plate) is suppressed by the vibration damping material 1714, and then further, the vibration is blocked (and / or the noise associated with the vibration is absorbed) by the vibration insulator 1720 formed of this rock wool or the like, and furthermore, 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.

[0036] 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 only 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 a ring-shaped elastic (such as EPDM) ring elastic material (rubber ring 1900) corresponding to the outer diameter of the drainage collecting pipe (more specifically, the outer diameter of the body part, which is the straight pipe part below the lateral branch pipe connection part 1120 of the upper pipe), and through this, the drainage collection It is preferable to abut against the outer surface of the combined pipe in terms of ensuring water tightness. From the viewpoint of ensuring water tightness, instead of the ring elastic material (rubber ring 1900), a packing structure can also be adopted. 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 elapses, for example, it is also preferable to use the 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. Note that, for improving the assembly work efficiency, the sound insulation cover 1730 of the outer layer member and the rubber ring 1900 are made into separate members (even if they are of the same material).

[0037] <Thermally expandable refractory> A thermally expandable refractory 1712 is provided in the innermost layer 1710 of the outer layer member having the three-layer structure as described above. The feature of the present invention lies in the position of this thermally expandable refractory. This will be described in detail below. The form of the thermally expandable refractory 1712 is not limited to any of a refractory putty, a refractory sheet, a refractory tape, etc.

[0038] As shown in FIGS. 1 and 2, the height position of this thermally expandable refractory 1712 is preferably above the upper end of the standard lower pipe 1500 constituting the medium-rise drainage collecting pipe 1000 and below the upper end of the outer layer member 1700 (the upper end of the sound insulation cover 1730), and is preferably above the upper end of the standard lower pipe 1500 constituting the super high-rise drainage collecting pipe 1040 and below the upper end of the outer layer member 1700 (the upper end of the sound insulation cover 1730). And only the upper pipe or only the extension pipe exists on the inner circumference of this thermally expandable refractory 1712 (for example, it does not have internal protrusions protruding from the inner circumferential surface of the drainage collecting pipe or is not of a double structure with a socket or the like). That is, it is preferable that only a straight pipe portion without internal protrusions (for example, a deflector plate or a swirling vane) exists on the inner circumference of this thermally expandable refractory 1712.

[0039] A water stop member (the above-mentioned rubber ring 1900) that makes the outer layer member closely contact the outer circumference of the upper pipe and has water tightness is provided at the upper end of the outer layer member, and it is preferable that the outer layer member covers the drainage collecting pipe.

[0040] <High drainage capacity under specific conditions> A major technical feature of the present invention is that the medium - high - rise drainage manifold 1000 shown in FIG. 1 and the super - high - rise drainage manifold 1040 shown in FIG. 2, which have the above - described configuration, exhibit high drainage capacity under specific conditions. Regarding this point, a detailed explanation will be given below. Among the common points of the medium - high - rise drainage manifold 1000 and the super - high - rise drainage manifold 1040, which are drainage manifolds according to this embodiment, the medium - high - rise drainage manifold 1000 will be described as a representative. Note that the (standard) lower pipe 1500 is common to the medium - high - rise drainage manifold 1000 and the super - high - rise drainage manifold 1040. Also, as a drainage capacity test method, the "Drainage Capacity Test Method for Drainage Standpipe Systems in Apartment Houses (SHASE - S218)", which is a standard of the Air Conditioning and Sanitary Engineering Society, was adopted.

[0041] The standard lower pipe 1500 that constitutes the medium - high - rise drainage manifold 1000 is provided with a turning vane 1600, which is a downward deflector plate, protruding from the inner wall to the inner circumference at a height position overlapping the reduced - diameter portion DR in the standard lower pipe 1500. For this reason, the drainage from the 6 - o'clock lateral branch pipe facing the 0 - o'clock direction hits the turning vane 1600, which is a downward deflector plate, and the flow of the drainage is disturbed, which may block the air passage and lead to a decrease in drainage capacity. On the other hand, the drainage from the 0 - o'clock lateral branch pipe other than the 6 - o'clock direction and the 3 - o'clock lateral branch pipe is drainage from a direction not facing the turning vane 1600, which is a downward deflector plate, so the influence leading to such a decrease in drainage capacity is small. As a result, in the medium - high - rise drainage manifold according to this embodiment, when the lateral branch pipes are connected in three directions, the drainage capacity confirmed one by one in each direction is higher in two specific directions (here, the 0 - o'clock direction and the 3 - o'clock direction not facing the 0 - o'clock position where the turning vane 1600, which is a downward deflector plate, exists) than in the other one direction (here, the 6 - o'clock direction facing the 0 - o'clock position where the turning vane 1600, which is a downward deflector plate, exists). Note that "opposite" means facing each other (in the normal sense, here, having a phase difference of about 180 degrees).

[0042] In the present embodiment, the downward flow deflector provided in the lower pipe is described as being provided as a swivel blade 1600 protruding from the inner wall in the 0 o'clock direction to the inner circumference. However, in the present invention since the position and number of this downward flow deflector are not limited to one location or one piece, for example, the downward flow deflector provided in the lower pipe may be added to the swivel blade in the 0 o'clock direction and a flow deflector protrusion protruding from the inner wall in the 6 o'clock direction to the inner circumference may be provided (it may also be a factor related to other downward flow deflectors). The middle and high-rise drainage manifold according to the present embodiment has a drainage capacity checked one by one in one direction when the lateral branch pipes are connected in three directions, and a specific one direction (here, the 3 o'clock direction not facing the 0 o'clock and 6 o'clock where the downward flow deflector exists) is higher than the other two directions (here, the 6 o'clock direction and the 0 o'clock direction facing the 0 o'clock and 6 o'clock where the downward flow deflector exists).

[0043] Further, the upper high-rise pipe 1140 constituting the high-rise drainage manifold 1040 is provided with an upward flow deflector 1200 protruding from the inner circumference in the direction (here, the 9 o'clock direction) not provided with the lateral branch pipe connection portion 1120 in order to change the flow of drainage. Although such an upward flow deflector 1200 is provided, this upward flow deflector 1200 is located in the body portion of the high-rise drainage manifold 1040 and is not provided in the reduced diameter portion DR like the swivel blade 1600 as the downward flow deflector. Therefore, the influence on the above-described major technical feature of the present invention, that is, the expression of high drainage capacity under specific conditions (when the lateral branch pipes are connected in three directions, the drainage capacity checked one by one in one direction, a specific one direction is higher than the other two directions, or specific two directions are higher than the other one direction) is small.

[0044] Here, the direction with a high drainage capacity is preferably 10% or more higher than the direction with a low drainage capacity. A high-performance drainage manifold with a connection direction (one-way or two-way) of a lateral branch pipe having a drainage capacity 10% or more higher can be realized. Also, it is preferable to connect the lateral branch pipes only in the direction with a high drainage capacity, and it is also preferable not to connect the lateral branch pipes in the direction with a low drainage capacity. When there is a difference in drainage capacity of 10% or more like this, it is easy to determine whether to connect the lateral branch pipes only in the direction with a high drainage capacity (two-way or one-way), or not to connect the lateral branch pipes in the direction with a low drainage capacity (one-way or two-way). And because it can be easily determined like this, the connection direction of the lateral branch pipes in the drainage manifold (the drainage manifold 1000 for medium and high-rise buildings and the drainage manifold 1040 for super high-rise buildings) can be easily determined and constructed. As described above, when not connecting the lateral branch pipes, as an example, the lateral branch pipe connection part 1120 in the direction where the lateral branch pipes are not connected is plugged using a plug (this plug is plugged through the lateral branch pipe socket 1122 and the rubber ring 1124) so as not to connect the lateral branch pipes.

[0045] Here, it should be noted that in a drainage manifold to which a plurality (maximum three) of lateral branch pipes can be connected, even if only the lateral branch pipes in a specific direction exhibit a high drainage capacity, if the drainage capacity of the lateral branch pipes in another direction is low, the drainage capacity of the drainage manifold is pulled down by the lower one. That is, the drainage capacity of the drainage manifold becomes the drainage capacity of the lateral branch pipe in the direction with the lowest drainage capacity. This means that in order to obtain a drainage manifold that exhibits a high drainage capacity, it is preferable that there is no difference in drainage capacity depending on the direction of the lateral branch pipes. Also, by connecting the lateral branch pipes only in the direction with a high drainage capacity and not connecting the lateral branch pipes in the direction with a low drainage capacity (that is, using only the lateral branch pipes in a specific direction with a high drainage capacity), it becomes possible to exhibit a high drainage capacity as a drainage manifold.

[0046] As described above, according to the drainage manifold according to the present embodiment, it is a resin drainage manifold disposed in the through hole of the floor slab of a building, and up to three lateral branch pipe connection parts for connecting lateral branch pipes are provided above the floor slab, and in the drainage manifold provided with a downward deflector plate for changing the flow of drainage in the lower pipe, when the lateral branch pipes are connected in three directions, the drainage capacity checked one by one in each direction is such that a specific one direction is higher than the other two directions, or specific two directions are higher than the other one direction (exhibiting a high drainage capacity under specific conditions). A drainage manifold can be provided. In particular, according to the drainage manifold according to the present embodiment, since it has a specific direction (one direction or two directions) with a high drainage capacity, one or two high-performance drainage manifolds can be realized.

[0047] It should be considered that all aspects of the embodiments disclosed this time are illustrative and not restrictive. The scope of the present invention is indicated by the scope of claims rather than the above description, and it is intended that all modifications within the meaning and scope equivalent to the scope of claims are included.

Industrial Applicability

[0048] The present invention is preferably applicable to a resin drainage manifold disposed in the through hole of the floor slab of a building, and up to three lateral branch pipe connection parts for connecting lateral branch pipes are provided above the floor slab, and in the drainage manifold provided with a downward deflector plate for changing the flow of drainage in the lower pipe, when the lateral branch pipes are connected in three directions, the drainage capacity checked one by one in each direction is such that a specific one direction is higher than the other two directions, or specific two directions are higher than the other one direction (exhibiting a high drainage capacity under specific conditions). It is particularly preferable in that a drainage manifold can be realized.

Explanation of Reference Numerals

[0049] 1000 Drainage manifold for medium and high-rise buildings 1040 Drainage manifold for super high-rise buildings 1100 (Standard) Upper pipe 1140 Upper pipe for super high-rise buildings 1200 Upward deflector plate 1310 Backflow prevention rib 1500 (Standard) Lower Tube 1600 Swivel Vane (Lower Deflector Plate) 1700 Outer 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 vertical pipe for draining water to a lower floor, 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 vertical pipe connection portion for connecting an upper vertical pipe for draining water from an upper floor and up to three horizontal branch pipe connection portions for connecting horizontal branch pipes above the floor slab, the lower pipe includes a lower vertical pipe connection portion for connecting the lower vertical pipe, a reduced diameter portion provided on the upstream side of the lower vertical pipe connection portion, and a lower deflection plate provided on the lower pipe for changing the flow of drainage, The drainage manifold is characterized in that, in the drainage manifold connecting the horizontal branch pipes in three directions, when the drainage capacity is checked one by one in each direction, the drainage capacity in a specific one direction is higher than that in the other two directions, or the drainage capacity in specific two directions is higher than that in the other one direction.

2. The drainage manifold according to claim 1, wherein the upper pipe further includes an upper deflection plate protruding inward from the inner wall where the horizontal branch pipe connection portion does not exist at the height position of the horizontal branch pipe connection portion for changing the flow of drainage.

3. The drainage manifold according to claim 1 or claim 2, wherein the direction with higher drainage capacity is 10% or more higher than the direction with lower drainage capacity.

4. The drainage manifold according to claim 1 or claim 2, wherein the horizontal branch pipe is connected only in the direction with higher drainage capacity.

5. The drainage manifold according to claim 1 or claim 2, wherein the horizontal branch pipe is not connected in the direction with lower drainage capacity.

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