Manifold joint

Abstract

To provide a manifold joint capable of improving workability in cleaning operations.SOLUTION: A manifold joint 16 comprises an upper connection member 21 to which a vertical pipe disposed above is connected, a lower connection member 23 to which a vertical pipe disposed below is connected, and a joint member 22 to which the upper connection member 21 is connected at an upper part, the lower connection member is connected at a lower part, and a horizontal pipe 13 is connected. The upper connection member 21 has a guide member 26 comprising a cylindrical connection part 31 connected to the joint member 22, a wall part 32 provided radially inward of the connection part 31 to guide drainage, and a swirl vane 47 supported by the wall part 32 to impart a swirling force to the drainage. The guide member 26 has an enlarged diameter part 45 at a portion where the circumferential position of the wall part 32 does not overlap with the horizontal pipe 13, the enlarged diameter part 45 being larger in diameter than the other portions of the wall part 32.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a mass joint. [Background technology]

[0002] A common joint described in Patent Document 1 below has been known. This common joint includes an upper connecting member to which a vertical pipe disposed above is connected, a lower connecting member to which a vertical pipe disposed below is connected, and a joint member to which the upper connecting member is connected at its upper end, the lower connecting member is connected at its lower end, and a horizontal pipe is connected. The upper connecting member has a cylindrical connecting portion connected to the joint member, a guide member provided inside the connecting portion to guide the drained water, and a swirl vane supported by the wall portion to impart a swirling force to the drained water. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-134213 Summary of the Invention [Problem to be solved by the invention]

[0004] When cleaning the inside of a drainage pipe, a cleaning tool connected to a hose may be inserted from the lower floor and moved by handling the hose while spraying water from the cleaning tool. In this case, when attempting to raise the cleaning tool within the manifold while handling the hose, the cleaning tool is likely to get caught between the wall portion of the manifold's guide member that guides the drainage and the joint member connected to its radially outer connector. This situation reduces the efficiency of the cleaning work.

[0005] The present invention has been made to solve such problems, and has as its object to provide a manifold that can improve the workability of cleaning work. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the collective joint of the present invention comprises an upper connecting member to which a vertical pipe arranged above is connected, a lower connecting member to which a vertical pipe arranged below is connected, and a coupling member to which the upper connecting member is connected at the top and the lower connecting member is connected at the bottom, and to which a horizontal pipe is connected, wherein the upper connecting member has a cylindrical connecting portion connected to the coupling member, and a guide member comprising a wall portion arranged radially inside the connecting portion to guide drainage water, and swirl vanes supported on the wall portion to impart a swirling force to the drainage water, and the guide member has an enlarged diameter portion at a portion of the wall portion that does not overlap with the horizontal pipe in the circumferential direction, the enlarged diameter portion being larger in diameter than other portions of the wall portion.

[0007] In this manifold, the guide member of the upper connecting member has an enlarged diameter section that is larger in diameter than the rest of the wall section in a section that does not overlap circumferentially with the horizontal pipe of the wall section that guides the drainage. By having the enlarged diameter section in the guide member, when a cleaning tool connected to a hose is inserted from the lower floor side to clean the inside of the manifold, the cleaning tool is prevented from getting caught at the enlarged diameter section between the wall section that guides the drainage and the joint member connected to the connecting section. This potentially improves the workability of the cleaning operation.

[0008] In the collective joint of the present invention, the guide member may have a wall main body that is provided radially inside the connecting portion and guides drainage, and a radial extension portion that extends radially outward from the wall main body and forms the expanded diameter portion together with a part of the connecting portion.

[0009] In this collective joint, a portion of the connecting portion forms the enlarged diameter portion, so there is no gap at the enlarged diameter portion between the wall portion that guides the drainage water and the joint member connected to the connecting portion, preventing the cleaning tool from getting caught. This makes it possible to further improve the workability of the cleaning work. In addition, in this collective joint, a portion of the connecting portion forms the enlarged diameter portion, so the structure is simple and costs can be reduced. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a collective joint that can improve the workability of cleaning work. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a cross-sectional front view of a mass joint according to an embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional side view of a main part of the same collective joint. [Figure 3] FIG. 2 is a perspective view of a guide member of the same collective joint. [Figure 4] FIG. 4 is a bottom view of the guide member of the same collective joint. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, a piping structure in which an embodiment of a group joint according to the present invention is used will be described with reference to the drawings.

[0013] As shown in FIG. 1, the piping structure 1 includes a vertical pipe 11 extending from an upper floor, a vertical pipe 12 extending from a lower floor, a horizontal pipe 13 extending from the side, and a joint assembly 16 of this embodiment.

[0014] The joint assembly 16 is composed of an upper connecting member 21 to which the vertical pipe 11 disposed above is connected, a joint member 22 connected to the lower part of this upper connecting member 21 and to which the three horizontal pipes 13 shown in Figures 1 and 2 are connected, and a lower connecting member 23 connected to the lower part of the joint member 22 and to which the vertical pipe 12 disposed below shown in Figure 1 is connected. Thus, the joint member 22 has the upper connecting member 21 connected to its upper part, the lower connecting member 23 connected to its lower part, and the horizontal pipe 13 connected to its vertically intermediate part.

[0015] The upper connecting member 21, the joint member 22 and the lower connecting member 23 that constitute the joint assembly 16 are all made of synthetic resin.

[0016] Three horizontal pipes 13 shown in Figures 1 and 2 are connected to the manifold 16 so that they form an approximately T-shape in plan view. The horizontal pipe 13 shown in Figure 2 is referred to as the central horizontal pipe 13(C), the horizontal pipe 13 shown in Figure 1 located on the left side of the central horizontal pipe 13(C) when viewed from the front is referred to as the left horizontal pipe 13(L), ​​and the horizontal pipe 13 shown in Figure 1 located on the right side of the central horizontal pipe 13(C) when viewed from the front is referred to as the right horizontal pipe 13(R). The left horizontal pipe 13(L) and the central horizontal pipe 13(C) shown in Figure 2 are 90 degrees out of phase with each other, the right horizontal pipe 13(R) shown in Figure 1 and the central horizontal pipe 13(C) shown in Figure 2 are 90 degrees out of phase with each other, and the left horizontal pipe 13(L) and the right horizontal pipe 13(R) shown in Figure 1 are 180 degrees out of phase with each other.

[0017] The upper connecting member 21 comprises an upper receiving member 25 to which the upper vertical pipe 11 is connected, and a lower guide member 26 to which the lower joint member 22 is connected.

[0018] The receiving member 25 is integrally formed with three cylindrical sections: an upper receiving port 25a, an intermediate section 25b, and a lower receiving port 25c, with the upper receiving port 25a having a larger diameter than the intermediate section 25b, and the lower receiving port 25c having a slightly larger diameter than the intermediate section 25b. The receiving member 25 has the vertical pipe 11 connected to the upper receiving port 25a and the guide member 26 connected to the lower receiving port 25c.

[0019] Here, the inner diameter of the vertical pipe 11, the inner diameter of the intermediate portion 25b, and the inner diameter of the guide member 26 are formed to be approximately the same, and when the vertical pipe 11 and the guide member 26 are connected to the receiving member 25, the inner surfaces of these vertical pipe 11, receiving member 25, and guide member 26 become approximately continuous surfaces, so that the step difference is kept small.

[0020] If the inner diameter of the vertical pipe 11 is slightly larger than the inner diameter of the guide member 26, the diameter of the middle portion 25b of the receiving member 25 may be tapered downward. In any case, it is preferable that, when the vertical pipe 11 and the guide member 26 are connected to the receiving member 25, the inner peripheral surface of the vertical pipe 11, the inner peripheral surface of the middle portion 25b of the receiving member 25, and the inner peripheral surface of the guide member 26 form a substantially continuous surface, and that the step is kept small.

[0021] The guide member 26 has a cylindrical connecting portion 31 that is connected to the coupling member 22, and a cylindrical wall portion 32 that is provided radially inside the connecting portion 31 and is connected to the lower receiving port 25c of the receiving port member 25 to guide drainage.

[0022] The connecting portion 31 has a cylindrical connecting portion main body 35, a tapered portion 36 that extends upward from the upper edge of the connecting portion main body 35 while decreasing in diameter, and an extending portion 37 that extends downward from the lower end of the connecting portion main body 35 and has a curved shape similar to that of the connecting portion main body 35, as shown in Fig. 3. As shown in Fig. 2, the connecting portion main body 35 has a lower outer peripheral portion 35b that has a smaller outer diameter than the upper outer peripheral portion 35a above it, forming a stepped shape. The lower outer peripheral portion 35b continues to the lower end of the extending portion 37.

[0023] As shown in FIG. 3, the wall portion 32 has a cylindrical lower portion with a rectangular opening 41 formed therethrough in the radial direction, and a wall portion main body 42 arranged coaxially radially inside the connecting portion 31 to guide drainage. The opening 41 is arranged to overlap the extension portion 37 in the circumferential direction of the wall portion 32. The opening 41 extends downward from the lower end of the wall portion main body 42. As shown in FIG. 2, the tapered portion 36 of the connecting portion 31 is connected to the wall portion main body 42 at a central position in the axial direction. The upper edge of the opening 41 is continuous with the upper end position of the tapered portion 36. The opening 41 is formed partially in the circumferential direction of the wall portion main body 42.

[0024] As shown in FIG. 3 , the wall portion 32 has a first radial extending portion 43 and a second radial extending portion 44 that extend radially outward from both circumferential edges that form the opening 41 of the wall portion main body 42 and are connected to the tapered portion 36, the connecting portion main body 35, and the extending portion 37. The first radial extending portion 43 and the second radial extending portion 44 are both flat plate-shaped and extend along the radial direction and axial direction of the wall portion main body 42. As shown in FIG. 2 , the lower edge of the connecting portion main body 35 is located above the lower end of the wall portion main body 42. In contrast, as shown in FIG. 3 , the extending portion 37, the first radial extending portion 43, and the second radial extending portion 44 extend to the lower end of the wall portion main body 42. The extension portion 37 extending from the connecting portion main body 35 to the lower end of the wall portion main body 42 is formed between the first radial extension portion 43 and the second radial extension portion 44 in the circumferential direction of the wall portion 32.

[0025] The guide member 26 includes a first radial extending portion 43 and a second radial extending portion 44 extending radially outward from the wall main body 42, a range between the first radial extending portion 43 and the second radial extending portion 44 in the circumferential direction of the connecting portion main body 35 and the tapered portion 36 which are parts of the connecting portion 31, and an extending portion 37 which is part of the connecting portion 31, which form an expanded diameter portion 45 that expands radially outward from the wall main body 42 which is the other part of the wall portion 32. Thus, the guide member 26 has the first radial extending portion 43 and the second radial extending portion 44 which extend radially outward from the wall main body 42 and form the expanded diameter portion 45 together with a part of the connecting portion 31.

[0026] As shown in Fig. 2, the expanded diameter portion 45 is provided on the radially opposite side of the wall portion 32 from the central port horizontal pipe 13(C). In other words, the expanded diameter portion 45 is provided at a position 180 degrees different from the central port horizontal pipe 13(C) in the circumferential direction of the wall portion 32. As shown in Fig. 1, the expanded diameter portion 45 has a first radial extension portion 43 provided on the left port horizontal pipe 13(L) side and a second radial extension portion 44 provided on the right port horizontal pipe 13(R) side. The expanded diameter portion 45 is provided in a portion of the wall portion 32 that does not overlap in the circumferential direction with any of the central port horizontal pipe 13(C) shown in Fig. 2 and the left port horizontal pipe 13(L) and right port horizontal pipe 13(R) shown in Fig. 1.

[0027] The inner peripheral surface of the wall main body 42 is provided with upper swirl vanes 47 (swirl vanes) that impart swirl to the wastewater flowing down inside the wall 32, and backflow prevention ribs 48 that prevent the swirled wastewater from flowing into the left-port horizontal pipe 13(L) shown in Fig. 1. In other words, the guide member 26 is provided with upper swirl vanes 47 shown in Fig. 2 that are supported by the wall main body 42 of the wall 32 and impart a swirling force to the wastewater.

[0028] The upper swirl vane 47 is a semi-arcuate plate, with its arc portion joined to the inner circumferential surface of the wall main body 42 and its chord portion formed integrally with the inner circumferential surface of the wall main body 42 so that it protrudes toward the center of the wall main body 42. The upper swirl vane 47 is inclined relative to the vertical direction (pipe core) and is provided on the circumferential side of the wall main body 42 toward the central port horizontal pipe 13(C). The upper swirl vane 47 is provided so that its chord portion extends in a direction connecting the left port horizontal pipe 13(L) and the right port horizontal pipe 13(R) shown in FIG. 1 in a plan view. The upper surface of the upper swirl vane 47 shown in FIG. 2 is inclined counterclockwise and downward in plan view. The entire circumference of the upper end of the wall portion 32 is above the upper swirl vane 47, and the entire circumference of the lower end is below the upper swirl vane 47. As a result, the entire upper swirl vane 47 is supported by a continuous portion of the wall portion 32 all around, which provides stronger support from the wall portion 32, making it less likely to vibrate and suppressing the generation of abnormal noise.

[0029] When the wastewater flowing down hits the upper surface of the upper swirl vane 47, a swirling force is applied to the wastewater in a counterclockwise direction in a plan view, causing the wastewater to flow down. Here, the lower end of the upper swirl vane 47 is formed above the lower edge of the wall main body 42. Therefore, even if a centrifugal force is applied to the swirling flow of the wastewater caused by this upper swirl vane 47, the wastewater flows down while swirling on the inner circumferential surface of the wall main body 42 below the upper swirl vane 47, and is prevented from flying out in the direction of the horizontal pipe 13, thereby preventing backflow into the horizontal pipe 13.

[0030] In addition, the wastewater that has been given a counterclockwise swirling force by the upper swirl vane 47 swirls and flows down the inner circumferential surface of the wall main body 42 on the side opposite the central-port horizontal pipe 13(C), so it tends to spread radially and attempt to flow into the left-port horizontal pipe 13(L) shown in Fig. 1, but the backflow prevention rib 48 prevents it from flowing into the left-port horizontal pipe 13(L). As shown in Fig. 4, the backflow prevention rib 48 is provided on the same plane as the first radial extension 43, and therefore the first radial extension 43 also prevents the swirling wastewater from flowing into the left-port horizontal pipe 13(L) shown in Fig. 1.

[0031] Furthermore, by fitting the coupling member 22 externally to the connecting portion 31, the guide member 26 can separate the inner surface of the wall main body 42, which is located radially inward from the connecting portion 31 and through which the vertical pipe flow flows, from the open end face of the horizontal pipe 13 connected to the coupling member 22, thereby further preventing backflow into the horizontal pipe 13.

[0032] Furthermore, because there is no upper swirl vane 47 above the left-port horizontal pipe 13(L) and because there is a backflow prevention rib 48 as described above, the drainage water from the left-port horizontal pipe 13(L) merges with the drainage water flowing down the inner circumferential surface of the wall section 32 and flows down the inner surface of the coupling member 22. Furthermore, the drainage water from the center-port horizontal pipe 13(C) and the right-port horizontal pipe 13(R) hardly merges with the drainage water that has been swirled by the upper swirl vane 47 and flowed down the inner circumferential surface of the wall section 32, and simply flows down the inner surface of the coupling member 22.

[0033] The coupling member 22 is composed of a coupling body 51 having a cylindrical shape extending in the vertical direction, with the guide member 26 connected to its upper part and the lower connecting member 23 connected to its lower part, and three horizontal pipe connecting portions 52 shown in Figures 1 and 2 that are provided so as to radially penetrate the coupling body 51 and communicate with each other.

[0034] As shown in FIG. 1, the upper end of the joint body 51 is formed with a slightly larger diameter to form a socket portion 51a into which the connecting portion body 35 of the guide member 26 and the lower outer peripheral portion 35b of the extension portion 37 shown in FIG. 2 are fitted, and the lower end is formed with a slightly smaller diameter only on the outer peripheral surface to form a spigot portion 51c into which the lower connecting member 23 is fitted.

[0035] The receiving portion 51a of the joint body 51 has a fitting portion for the extension portion 37 of the guide member 26 that extends downward by the width of the extension portion 37 below the fitting portion of the connecting portion body 35, and by fitting the extension portion 37 into this portion, the guide member 26 is positioned circumferentially relative to the joint member 22 and the horizontal pipe 13 so that it has the above-mentioned positional relationship.

[0036] The three horizontal pipe connecting portions 52 shown in FIGS. 1 and 2 are all short cylindrical bodies provided at approximately the center of the joint body 51 in the vertical direction, and communicate with the inside of the pipe of the joint body 51.

[0037] Each horizontal pipe connecting portion 52 has a base end portion 52a with a small diameter, and a connecting receiving portion 52b extending from the base end portion 52a to the tip end side with a large diameter, and a step portion 52c is formed on the inner peripheral surface thereof.

[0038] The peripheral edge of the base end 52a of the horizontal pipe connecting portion 52 is formed with an R surface 52d on the underside, so that wastewater flowing down from the guide member 26 and along the peripheral edge of the base end 52a does not flow into the horizontal pipe 13, but flows down along the inner surface of the fitting body 51.

[0039] The inner diameter of the connection receiving portion 52b of the horizontal pipe connecting portion 52 is approximately the same as the outer diameter of the horizontal pipe 13, and the inner diameter of the base end portion 52a is the same as the inner diameter of the horizontal pipe 13. When the horizontal pipe 13 is connected to the horizontal pipe connecting portion 52, the front end edge of the horizontal pipe 13 abuts against the step portion 52c and is connected, and the inner diameter of the base end portion 52a and the inner diameter of the horizontal pipe 13 form a continuous surface, so that no step is created.

[0040] In the horizontal pipe connecting portion 52, the horizontal pipe connecting portion 52 to which the center-port horizontal pipe 13(C) shown in Fig. 2 is connected is referred to as the horizontal pipe connecting portion 52(C), the horizontal pipe connecting portion 52 to which the left-port horizontal pipe 13(L) shown in Fig. 1 is connected is referred to as the horizontal pipe connecting portion 52(L), and the horizontal pipe connecting portion 52 to which the right-port horizontal pipe 13(R) is connected is referred to as the horizontal pipe connecting portion 52(R). Thus, when looking at the horizontal pipe connecting portion 52(C) shown in Fig. 2 from the front, the horizontal pipe connecting portion 52(L) shown in Fig. 1 is provided on the left side, and the right-port horizontal pipe 13(R) is provided on the right side. The horizontal pipe connecting portion 52(L) is 90 degrees out of phase with the horizontal pipe connecting portion 52(C) shown in Fig. 2, the horizontal pipe connecting portion 52(R) shown in Fig. 1 is 90 degrees out of phase with the horizontal pipe connecting portion 52(C) shown in Fig. 2, and the horizontal pipe connecting portion 52(L) and the horizontal pipe connecting portion 52(R) shown in Fig. 1 are 180 degrees out of phase with each other. The guide member 26 has an expanded diameter portion 45 in a portion of the wall portion 32 that does not overlap in the circumferential direction with the horizontal pipe connecting portion 52(C) shown in Fig. 2 or the horizontal pipe connecting portion 52(L) and the horizontal pipe connecting portion 52(R) shown in Fig. 1.

[0041] Four backflow prevention plates 54 consisting of vertically elongated ridges are provided at equal intervals around the circumferential surface of the joint body 51. Of the four backflow prevention plates 54, horizontal pipe connecting sections 52 are located between three of the plates adjacent to each other around the circumferential direction, and no horizontal pipe connecting section 52 is located between the remaining two. The backflow prevention plates 54 prevent wastewater from flowing back into the horizontal pipe connecting section 52.

[0042] The lower connecting member 23 is a funnel-shaped cylinder whose diameter decreases overall downward, with its upper end formed with a slightly larger diameter to form a socket 23a into which the spigot 51c of the coupling body 51 of the coupling member 22 fits, and its lower end forming a socket 23b into which the vertical pipe 11 arranged below fits. The spigot 51c of the coupling body 51 and the socket 23a of the lower connecting member 23 are provided with circumferential positioning portions (not shown) that fit together to position the lower connecting member 23 circumferentially relative to the coupling member 22.

[0043] Two lower swirl vanes 61 and 62 are provided on the inner surface of the lower connecting member 23, which impart a counterclockwise swirling force to the drainage water in a planar view, and both are formed integrally with the lower connecting member 23.

[0044] A cylindrical fire-resistant member 65 is provided inside the connecting portion between the joint body 51 and the lower connecting member 23. The fire-resistant member 65 has one of a three-layer structure in which a thermoplastic resin layer is formed on the inner and outer peripheral surfaces of a fire-resistant layer containing a thermoplastic resin and thermally expandable graphite, a two-layer structure in which a thermoplastic resin layer is formed on the inner or outer peripheral surface of a fire-resistant layer containing a thermoplastic resin and thermally expandable graphite, or a single-layer structure consisting of a fire-resistant layer containing a thermoplastic resin and thermally expandable graphite.

[0045] The fire-resistant member 65 is formed by extrusion molding in all three-layer, two-layer, and single-layer structures. In the case of a single-layer structure, it can also be formed by injection molding. When formed by injection molding, it is possible to integrally mold airflow control blades on the inside. The airflow control blades may be formed separately and bonded to the fire-resistant member 65.

[0046] Here, the fire-resistant layer contains, for example, a thermoplastic resin and flaky thermally expandable graphite. In this case, it preferably contains 100 parts by mass of the thermoplastic resin and 3 to 20 parts by mass of the flaky thermally expandable graphite. The thermoplastic resin of the fire-resistant layer and the thermoplastic resin layer are, for example, polyvinyl chloride resin.

[0047] The outer peripheral surface of the fire-resistant member 65 may be bonded with an adhesive to the inside of the connecting portion between the joint body 51 and the lower connecting member 23. When the fire-resistant member 65 is bonded with an adhesive to the inside of the connecting portion between the joint body 51 and the lower connecting member 23 and has a two-layer structure of a fire-resistant layer containing a thermoplastic resin and a thermoplastic resin layer, the outer peripheral surface to which the adhesive is applied is preferably the thermoplastic resin layer.

[0048] The collective joint 16 is installed in a through hole H provided in the floor slab S of the building. At that time, the connecting portion between the joint body 51 and the lower connecting member 23 is aligned vertically with the floor slab S. Therefore, the fire-resistant member 65 of the collective joint 16 is aligned vertically with the floor slab S. The axial length of the fire-resistant member 65 may be less than the thickness of the floor slab S or may be equal to or greater than the thickness of the floor slab S. When the axial length of the fire-resistant member 65 is less than the thickness of the floor slab S, it is preferable that the entire axial length of the fire-resistant member 65 is aligned vertically with the floor slab S. When the axial length of the fire-resistant member 65 is equal to or greater than the thickness of the floor slab S, it is preferable that the entire axial length of the fire-resistant member 65 is aligned vertically with the floor slab S. The gap between the through hole H of the floor slab S and the collective joint 16 is filled with mortar M. Instead of or in addition to the fire-resistant member 65, a fire-resistant sheet may be wrapped around the outside of the connecting portion between the joint body 51 and the lower connecting member 23 or around the outer surface of the lower connecting member.

[0049] When cleaning the inside of a drainage pipe including a manifold joint 16, as shown by the two-dot chain line in FIG. 2 , a cleaning tool 101 connected to a hose 100 may be inserted from the lower floor side and moved by handling the hose 100 while spraying water from the cleaning tool 101. In this case, if the cleaning tool 101 is attempted to be raised within the manifold joint 16 while being handled, the tension in the hose 100 causes the cleaning tool 101 to move within the manifold joint 16 while contacting the inner circumferential surface of the joint body 51 of the joint member 22. This makes the cleaning tool prone to getting caught in the gap between the wall portion 32 that guides the drainage of the guide member 26 of the upper connecting member 21 and the joint member 22 connected to the connecting portion 31 on the radially outer side of the wall portion. In the configuration described in Patent Document 1, there is a radial gap around the entire circumference between the connecting portion of the guide member and the wall portion, making the cleaning tool prone to getting caught, which reduces the workability of the cleaning operation.

[0050] In contrast, in the manifold joint 16 of this embodiment, the guide member 26 has an expanded diameter section 45 that is larger in diameter than other sections of the wall section 32 in a section of the wall section 32 that guides the drainage water, where the expanded diameter section 45 does not overlap the center horizontal pipe 13(C), the left horizontal pipe 13(L), ​​or the right horizontal pipe 13(R) in the circumferential direction. Because the guide member 26 has the expanded diameter section 45, when a cleaning tool 101 connected to a hose 100 is inserted from the lower floor side to clean the inside of the manifold joint 16, the gap between the wall section 32 that guides the drainage water and the joint member 22 connected to the connecting section 31 is small (specifically, there is no gap) at the expanded diameter section 45, so the cleaning tool 101 is prevented from getting caught. This potentially improves the workability of the cleaning operation.

[0051] In the collective joint 16 of this embodiment, the guide member 26 includes a wall main body 42 that is provided radially inside the connecting portion 31 and guides drainage, and a first radial extending portion 43 and a second radial extending portion 44 that extend radially outward from the wall main body 42 and form an expanded diameter portion 45 with a portion of the connecting portion 31. At the position of the expanded diameter portion 45, there is no gap between the wall portion 32 that guides drainage and the coupling member 22 connected to the connecting portion 31, preventing snagging. This can further improve the ease of cleaning operations. Furthermore, in the collective joint 16, because a portion of the connecting portion 31 forms the expanded diameter portion 45, the structure is simplified, resulting in lower costs.

[0052] Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configurations are not limited to these embodiments, and the present invention also includes modifications, combinations, deletions, etc. of the configurations within the scope of the gist of the present invention. Furthermore, it goes without saying that the configurations shown in each embodiment can be used in appropriate combinations.

[0053] The collective joint 16 of this embodiment may be provided with a sound-insulating material with sound-insulating properties or a sound-absorbing material with sound-absorbing properties, and these may be provided on the outer surfaces of the upper connecting member 21, the joint member 22, and the lower connecting member 23. As the sound-insulating material, polyethylene resin, polypropylene resin, vinyl chloride resin, etc., molded into a sheet or cylinder, may be used. As the sound-absorbing material, rock wool, glass wool, polyester felt, polyurethane, etc., molded into a sheet or cylinder, may be used. The sound-insulating material and the sound-absorbing material may be laminated, or the above-mentioned fire-resistant sheet may be laminated with the sound-insulating material or the sound-absorbing material. In addition, vibration-damping materials for suppressing vibration of the collective joint 16 may be provided on the outer surfaces of the upper connecting member 21, the joint member 22, and the lower connecting member 23. As the vibration-damping materials, rubber or elastomer molded into a sheet shape can be used. [Explanation of symbols]

[0054] 11,12 Vertical pipe 13(13(C),13(L),13(R)) Horizontal pipe 16. Collective joint 21 Upper connecting member 22 Joint member 23 Lower connecting member 26 Guidance member 31 Connecting part 32 Wall 42 Wall body 43 First radial extension part 44 Second radial extension part 45 Expanded diameter part 47 Upper swirl blade (swirl blade)

Claims

1. an upper connecting member to which a vertical pipe disposed above is connected; a lower connecting member to which a vertical pipe disposed below is connected; a coupling member to which the upper connecting member is connected, the lower connecting member is connected, and a horizontal pipe is connected; Equipped with The upper connecting member has a guide member including a cylindrical connecting portion connected to the coupling member, a wall portion provided radially inside the connecting portion to guide the drainage water, and a swirl vane supported on the wall portion to impart a swirling force to the drainage water, The guide member is A collective joint having an expanded diameter portion, the expanded diameter portion being larger in diameter than other portions of the wall portion, at a portion of the wall portion that does not overlap with the horizontal pipe in the circumferential direction.

2. The guide member is A wall body provided radially inside the connecting portion and guiding drainage; The collective joint according to claim 1 , further comprising a radially extending portion extending radially outward from said wall body and forming said enlarged diameter portion together with a part of said connecting portion.

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