Drainage piping joint

Abstract

To provide a drainage piping joint that has a sufficient drift function and can prevent clogging due to an object (solid matter) that obstructs a flow of drainage.SOLUTION: A drainage piping joint 100 has a side opening part 112 on a side surface of a cylindrical trunk part 110 having a vertical axis center. A lateral branch pipe connecting part 120 is provided in the side opening part 112, and an upper vertical connection part 140 and a lower vertical pipe connection part 160 are provided at upper and lower opening parts (upper opening part 114 and lower opening part 116) of a trunk part 110, respectively. The lateral branch pipe connection part 120 has a circular cross section centered on a lateral axis of the lateral branch pipe connection part 120 (without a swelling part), a drift plate 200 composed of a wall surface including a blocking part 210 and a clogging prevention part 220 for closing a part on a left side or a part on a right side of a circular cross section is provided in order to divert the drainage flowing from a lateral branch pipe to the side opening part 112 to either the left or right, and the wall surface does not project into the trunk part 110 (like a backflow prevention rib 300).SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a drainage pipe joint used in the drainage pipes of high-rise apartment buildings, etc., and in particular to a drainage pipe joint that has sufficient drift function while preventing clogging due to objects that obstruct the flow of drainage (such as waste, toilet paper, etc., which may be described as solid matter). [Background technology]

[0002] Water supply and drainage facilities are installed in apartment buildings, office buildings, etc. Among these, the drainage system is widely known as a typical drainage piping structure that includes vertical pipes that run vertically through each floor of the building, horizontal pipes installed within each floor, and drainage piping joints that connect these. A typical drainage pipe joint that connects these vertical pipes and horizontal pipes has a side opening on the side of a cylindrical body having a vertical axis, a horizontal branch pipe connection part at the side opening, and an upper riser pipe connection part and a lower riser pipe connection part at the top and bottom openings of the body. When using such a drainage pipe joint in the drainage pipe of a high-rise apartment building, etc., various conditions required in addition to the drainage capacity include that the ball diameter of the branch pipe inlet part is a specified value or more so that it is not clogged with objects (solids) that obstruct the flow of wastewater including sewage, and that the laundry drainage performance is excellent.

[0003] A drainage collecting pipe that satisfies these conditions is disclosed in JP 2004-092226 A (Patent Document 1), which is related to another application by the applicant of the present application. The drainage collecting pipe disclosed in Patent Document 1 has a side opening on the side surface of a cylindrical body having a vertical axis, a horizontal branch pipe connection part is provided at the side opening, and an upper standpipe connection part and a lower standpipe connection part are provided at the upper and lower openings of the body, in which a backflow prevention part that prevents drainage flowing down from above from flowing back into the side opening is molded to protrude inwardly toward the body diameter on the inner surface of the body above the side opening, and an axial center deflection part that deflects the drainage flowing down from above toward the axial center of the body is molded to protrude inwardly toward the body diameter on the left side when the side opening is viewed from the axial center of the body on the inner surface of the body above the backflow prevention part, and the protruding amount of the axial center deflection part is larger than the protruding amount of the backflow prevention part (Claim 1 of Patent Document 1). Furthermore, in this drainage collecting pipe, the horizontal branch pipe connecting portion is provided with a side deflection portion that deflects the drainage flowing from the horizontal branch pipe into the side opening to the left when the side opening is viewed from the axial center of the body (Claim 2 of Patent Document 1). Also, in this drainage collecting pipe, when the side opening is viewed from the axial center of the body, the left side surface of the horizontal branch pipe connecting portion is provided with a bulge portion that bulges out to the left (Claim 6 of Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2004-092226 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the drainage collecting pipe disclosed in the above-mentioned Patent Document 1, a side deflection section is provided to direct the drainage flowing in from the horizontal branch pipe sideways, so that even large volumes of drainage from toilets, etc. can be smoothly merged with the drainage flowing down from the standpipe.In addition, when looking at the side opening from the axial center of the body, the left side surface of the horizontal branch pipe connection section is a bulge that bulges out to the left, so that the spherical diameter passing through the branch pipe inlet section is equal to or larger than a predetermined value, preventing clogging with objects (solid matter) that would obstruct the flow of drainage including sewage.

[0006] Thus, the drainage collecting pipe disclosed in Patent Document 1 has been well-received for its high-performance drainage performance, which can prevent clogging caused by objects (solids) that obstruct the flow of drainage while having sufficient drifting function, but while it is provided with a side drifting section to direct the drainage flowing in from the horizontal branch pipe sideways so that even large amounts of drainage from toilets and the like can be smoothly merged with the drainage flowing down from the standpipe, the left side surface of the branch pipe connection section, which is located opposite the side drifting section, is provided with a bulging section that bulges out to the left to prevent clogging caused by solids. For this reason, it can be pointed out that the need to provide this bulging section makes the structure of the drainage collecting pipe disclosed in Patent Document 1 more complicated (compared to a cross-sectionally roughly circular structure without a bulging section) and increases the manufacturing cost.

[0007] The present invention was developed in consideration of the above-mentioned problems, and its purpose is to provide a drainage pipe joint for use in drainage piping in high-rise apartment buildings, etc., which has sufficient drift function while preventing clogging due to objects (solids) that obstruct the flow of drainage. [Means for solving the problem]

[0008] In order to achieve the above object, the drainage pipe joint according to the present invention employs the following technical measures. In other words, the drainage pipe fitting of the present invention is a drainage pipe fitting having a side opening on a side surface of a cylindrical body having a vertical axis, a horizontal branch pipe connection portion provided at the side opening, and an upper riser pipe connection portion and a lower riser pipe connection portion provided at the upper and lower openings of the body, respectively, and is characterized in that the horizontal branch pipe connection portion has a circular cross-section centered on the horizontal axis of the horizontal branch pipe connection portion, and is provided with a deflection plate configured including a wall surface that closes part of the left side or part of the right side of the circular cross-section in order to deflect drainage flowing from the horizontal branch pipe into the side opening to either the left or right.

[0009] Preferably, the horizontal branch pipe connection portion can be configured so as not to have a bulge portion that bulges in a direction away from the vertical axis at a position facing the deflection plate when viewed from the opening side of the upper and lower openings of the body portion. More preferably, the wall surface can be configured not to protrude into the body when viewed from the opening sides of the upper and lower openings of the body.

[0010] More preferably, the deflection plate can be configured to include a blocking portion for blocking the drainage water to generate the deflection flow, and a clogging prevention portion for preventing clogging of objects that obstruct the flow of the drainage water. More preferably, the blocking portion can be configured to include an upper blocking portion located higher than the clogging prevention portion, and a lower blocking portion located lower than the clogging prevention portion.

[0011] More preferably, the lower blocking section can be configured to have at least one of the functions of draining the object into the body section by floating the object when the flow rate of the wastewater is high, and of deflecting the wastewater when the flow rate of the wastewater is low. More preferably, the cross-sectional area through which the wastewater can flow can be configured to be larger on the lower side than on the upper side.

[0012] More preferably, the clogging prevention portion may be formed by cutting out a part of a wall surface of the blocking portion. More preferably, the clogging prevention portion may be formed by a shape in which a part of a wall surface of the blocking portion is cut out along a circular arc. More preferably, the blocking portion extends from the base end of the side opening to the clogging prevention portion. The distance can be configured to be shorter on the bottom side than on the top side.

[0013] More preferably, the radius of the notched arc may be set to be 15% or more and 200% or less of the inner diameter of the lateral branch pipe connecting portion. More preferably, the maximum horizontal length from the vertical axis to the notched arc can be configured to be 3% to 40% of the inner diameter of the horizontal branch pipe connecting portion. More preferably, the center of the notched arc can be positioned below the center of the inner diameter of the horizontal branch pipe connecting portion by a range of 1% to 30%. Effect of the Invention

[0014] According to the present invention, it is possible to provide a drainage pipe joint for use in drainage piping in high-rise apartment buildings, etc., which has sufficient drift function while preventing clogging due to objects (solid matter) that obstruct the flow of drainage. [Brief description of the drawings]

[0015] [Figure 1] 1A and 1B are a top view and a side view, respectively, showing a drainage piping structure in which a drainage pipe joint 100 according to an embodiment of the present invention is used. [Diagram 2] 1 is an exploded perspective view showing a drainage piping structure in which a drainage pipe joint 100 according to an embodiment of the present invention is adopted. [Diagram 3] FIG. 2 is a side view of the drainage pipe joint 100. [Figure 4] 1A is an external perspective view (side) of the drainage pipe joint 100, and FIG. 1B is an external perspective view (bottom to top) of the drainage pipe joint 100. FIG. [Diagram 5]1A is a cross-sectional view of a drainage pipe fitting looking at the side opening 112 from the body 110, showing (A) an imaginary passing sphere that can flow from a side branch pipe into the side opening in a drainage pipe fitting 100 equipped with a deflection plate 200, and (B) an imaginary passing sphere that can flow from a side branch pipe into the side opening in a drainage pipe fitting 102 equipped with a deflection plate 202 different from the deflection plate 200. [Figure 6] (A) A side view of a drainage pipe fitting 400 having technical features in common with the drainage pipe fitting 100 of an embodiment of the present invention, (B) a cross-sectional view of 6B in Figure 6(A), (C) an enlarged view of a deflector plate, and (D) an enlarged view of 6D in Figure 6(B). [Figure 7] FIG. 11 is a side view of a drainage pipe joint 500 according to a modified example of an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] In the following, a drain pipe joint 100 according to an embodiment of the present invention will be described in detail with reference to Figures 1 to 5, a drain pipe joint 400 having technical features common to the drain pipe joint 100 according to the embodiment of the present invention with reference to Figure 6, and a drain pipe joint 500 according to a modified embodiment of the present invention with reference to Figure 7. The drain pipe joint 100 and the drain pipe joint 400 having common technical features are given the same reference numerals in the drawings for the common technical features, and the common technical features may be described using either the drain pipe joint 100 or the drain pipe joint 400.

[0017] Here, the drain pipe joint 100 has the side branch pipe connection portion 120 in three directions, whereas the drain pipe joint 400 and the drain pipe joint 500 have the side branch pipe connection portion 120 in only one direction. The drain pipe joint according to the present invention is not particularly limited as long as it has an upper riser pipe connection portion and a lower riser pipe connection portion as well as one or more side branch pipe connections. Note that, depending on the number of side branch pipe connections, there are differences in the presence or absence of a backflow prevention rib 300 for preventing backflow from one side branch pipe to another side branch pipe (the drain pipe joint 400 and the drain pipe joint 500, which have the side branch pipe connection portion 120 in only one direction, do not require the backflow prevention rib 300) and the number of backflow prevention ribs 300, but this will be described later. Here, this does not apply to cases where the backflow prevention rib (backflow prevention portion, backflow prevention plate) has a function of preventing the drainage water flowing down from above from flowing back into the side opening. Even the pipe joint 500 may be provided with a backflow prevention rib. The backflow prevention rib 300 in this embodiment is for preventing backflow from one side branch pipe to another side branch pipe, and is less relevant to the technical features of the present invention, so the description will be given assuming that the drain pipe joint 400 and the drain pipe joint 500 do not include the backflow prevention rib 300 provided in the drain pipe joint 100.

[0018] The technical features common to the drain pipe joint 100 and the drain pipe joint 400 are structures that can prevent clogging due to objects (solid matter) that obstruct the flow of drainage while providing sufficient drift function, and will be described in detail mainly with reference to Figure 6. Here, the common technical features will be merely outlined below. The outline of the common technical features of the drainage pipe fitting 100 and the drainage pipe fitting 400 is that the horizontal branch pipe connecting part 120 has a circular cross section (here, a circular cross section means, for example, that it does not have a bulging part such as that disclosed in Patent Document 1 that bulges from a circular cross section) centered on the horizontal axis of the horizontal branch pipe connecting part 120, and is equipped with a deflection plate 200 configured including a wall surface that closes a part of the left side or a part of the right side of this circular cross section in order to deflect the drainage flowing from the horizontal branch pipe into the side opening 112 to either the left or right, and more specifically, the deflection plate 200 is equipped with a blocking part 210 for blocking the drainage to cause deflection, and a clogging prevention part 220 for preventing clogging of objects that obstruct the flow of the drainage, and the clogging prevention part 220 is formed by a shape in which a part of the wall surface of the blocking part 210 is cut out by an arc-shaped cutout arc 222.

[0019] Here, the drawings shown in Figures 1 to 7 are schematic drawings including cases where configurations that are not particularly relevant to the present invention are omitted, and there may be cases where there is not complete consistency between the drawings. As shown in Figures 1 and 2, a drainage piping structure using a drainage pipe fitting 100 according to an embodiment of the present invention includes a drainage pipe fitting 100, a portion of which is provided in a through hole that vertically penetrates a floor slab S in a building, an upper riser on the upper floor side that is connected (via an upper riser connecting member) to an upper riser connection portion 140 of the drainage pipe fitting 100 above the floor slab S and allows drainage water to flow in from the upper floor, horizontal branch pipes (three on each side in this case) that are connected (via a horizontal riser connecting member) to a horizontal branch pipe connection portion 120 of the drainage pipe fitting 100 above the floor slab S, and a lower floor lower riser (a reduced diameter pipe with a swivel vane and a straight pipe) that is connected to a lower riser connection portion 160 of the drainage pipe fitting 100 below the floor slab S and allows drainage water to flow out to the lower floor. Although the drainage piping structure using the drainage pipe joint 100 is shown to be used on floors other than the lowest floor, the drainage piping structure using the drainage pipe joint 100 according to the present embodiment can also be used on the lowest floor, and in the case of the lowest floor, the lower standpipe is composed of a lower standpipe (straight pipe) and a 90-degree bend pipe, for example. Note that these drainage piping structures are examples, and the drainage pipe joint 100 according to the present invention is not limited to the drainage piping structures shown. Here, vibration damping materials, vibration insulators, sound insulation covers, etc. provided on the lower standpipe (reduced diameter pipe with swirl vanes), which are less relevant to the technical features of the present invention, will not be described.

[0020] As shown in Fig. 1 to Fig. 5, the drain pipe joint 100 has a side opening 112 on the side of a cylindrical body 110 (hereinafter, the cylindrical body 110 may be simply referred to as the body 110) having a vertical axis, a horizontal branch pipe connection part 120 is provided in the side opening 112, and an upper rise pipe connection part 140 and a lower rise pipe connection part 160 are provided in the upper and lower openings (upper opening 114 and lower opening 116) of the body 110, respectively. As described above, in the drain pipe joint 100 shown in Fig. 1 to Fig. 5, the side openings 112 and the horizontal branch pipe connection parts 120 provided therein are provided at three locations spaced at 90° intervals in a plan view, while the drain pipe joint 400 shown in Fig. 6 (the same applies to the drain pipe joint 500 according to the modified example shown in Fig. 7) has the side opening 112 and the horizontal branch pipe connection part 120 provided therein at only one location.

[0021] In this drainage pipe joint 100, the horizontal branch pipe connecting portion 120 has a circular cross section centered on the horizontal axis of the horizontal branch pipe connecting portion 120, and drainage water flowing from the horizontal branch pipe into the side opening 112 is diverted to the left and right. The drainage pipe joint 100 is provided with a deflection plate 200 including a wall surface closing a part of the left side or a part of the right side of the circular cross section to deflect the drainage pipe to one side or the other. In this embodiment, as shown in Fig. 5 and Fig. 6, the deflection plate 200 is configured to include a wall surface (more specifically, a blocking part 210 and a clogging prevention part 220) closing a part of the left side of the circular cross section of the horizontal branch pipe connection part 120. This is because, for example, the drainage pipe joint 100 on each floor is provided with a swirling vane as shown in Fig. 2, which generates a counterclockwise swirling flow when the upper standpipe or the lower standpipe is viewed vertically from above (in Fig. 4(B) and Fig. 6(B), the swirling flow is expressed as clockwise because the drainage pipe joint 100 is viewed from below), and by deflecting the drainage pipe from the horizontal branch pipe to the right (by stopping or weakening the flow on the left side), the drainage pipe from the horizontal branch pipe can be merged with the drainage pipe swirling counterclockwise and flowing down from above with little resistance.

[0022] Here, the horizontal branch pipe connecting part 120 does not have a bulge part bulging in a direction away from the vertical axis of the cylindrical body part 110 at a position facing the drift plate 200 when viewed from the opening side of the upper and lower openings (upper opening 114 and lower opening 116) of the body part 110. That is, in this drainage pipe joint 100, the horizontal branch pipe connecting part 120 has a circular cross section centered on the horizontal axis of the horizontal branch pipe connecting part 120, and does not have a bulge part bulging from the circular cross section (as disclosed in Patent Document 1 as an example). Therefore, since there is no need to provide such a bulge part, the cross-sectional structure of the body part 100 of the drainage pipe joint 100 becomes a substantially circular structure, which can be simplified and the risk of an increase in manufacturing costs can be suppressed. Note that, even without such a bulge part, clogging due to objects (solids) that obstruct the flow of drainage can be prevented, as will be described later.

[0023] Also, when viewed from the opening side of the upper and lower openings (upper opening 114 and lower opening 116) of the body 110, the wall surface constituting the deflection plate 200 does not protrude into the body 110. That is, in this drainage pipe joint 100, the horizontal branch pipe connecting part 120 has a circular cross section centered on the horizontal axis of the horizontal branch pipe connecting part 120, and the wall surface constituting the deflection plate 200 does not protrude into the body 110 like the backflow prevention rib 300 shown in FIG. 3 or FIG. 4. Therefore, since there is no need to provide the deflection plate 200 protruding into the body 110, the cross-sectional structure of the body 100 of the drainage pipe joint 100 becomes a substantially circular structure, which can be simplified and the risk of an increase in manufacturing costs can be suppressed, and since the deflection plate 200 does not protrude into the body 110, it is possible to suppress the obstruction of the flow of wastewater flowing down from the top to the bottom of the body 110. In this way, the deflector plate 200, which deflects the wastewater flowing from the horizontal branch pipe into the side opening 112 to either the left or right, does not protrude into the body 110, and the wall surface of the deflector plate 200 is shaped to extend along the circular cross section of the body, which is a feature that significantly differs from both the above-mentioned backflow prevention rib and conventional deflector plates.

[0024] More specifically, the deflection plate 200 is composed of a blocking portion 210 (more specifically, an upper blocking portion 210U and a lower blocking portion 210D) for blocking the drainage (from the horizontal branch pipe to the body portion 110 of the drainage pipe joint 100) to generate a drift flow, and a clogging prevention portion 220 for preventing clogging by objects (solid objects such as waste and toilet paper) that obstruct the flow of drainage (from the horizontal branch pipe to the body portion 110 of the drainage pipe joint 100). Because the deflection plate 200 is provided with such clogging prevention portion 220, clogging by objects (solid objects) that obstruct the flow of drainage can be prevented even without a bulging portion as disclosed in Patent Document 1 as described above.

[0025] More specifically, the description will be made with reference to Fig. 5, which is a cross-sectional view of the drain pipe joint 100 looking at the side opening 112 from the body 110 (looking outward from the center of the vertical axis of the drain pipe joint 100). Fig. 5(A) shows a hypothetical passing sphere (diameter PB(1)) that can flow from a side branch pipe to the side opening in a drain pipe joint 100 equipped with a deflection plate 200 having a clogging prevention portion 220, and Fig. 5(B) shows a hypothetical passing sphere (diameter PB(1)) that can flow from a side branch pipe to the side opening in a drain pipe joint 102 equipped with a deflection plate 202 different from the deflection plate 200 and that does not have a clogging prevention portion 220. The imaginary passing sphere (diameter PB(2)) is shown. When the inner diameter φd of the side branch pipe connecting portion 120 is 102.8 mm (when a side branch pipe connecting member with a nominal diameter of 100 is connected to the side branch pipe connecting portion 120), the diameter PB(1) of the imaginary passing sphere is 68 mm and PB(2) is 60 mm, which is an improvement of 13.3%.

[0026] 6, the blocking section 210 is composed of an upper blocking section 210U that is located higher than the clogging prevention section 220, and a lower blocking section 210D that is located lower than the clogging prevention section 220. Naturally, the upper blocking section 210U is located higher than the lower blocking section 210D (higher than the clogging prevention section 220). The lower blocking section 210U has at least one of the following functions: a function of discharging objects (solids) into the body section 110 by suspending the objects when the flow rate of drainage water (from the side branch pipe to the drain pipe joint 100) is high, and a function of deflecting the drainage water when the flow rate of drainage water (from the side branch pipe to the drain pipe joint 100) is low. This provides a sufficient deflection function even when the flow rate of drainage water from the side branch pipe to the drain pipe joint 100 is low, while preventing clogging due to objects (solids) that obstruct the flow of drainage water when the flow rate of drainage water from the side branch pipe to the drain pipe joint 100 is high.

[0027] As shown in Figures 3 to 6, the cross-sectional area through which drainage can flow (from the horizontal branch pipe to the drain pipe joint 100) is larger on the lower side than on the upper side. Furthermore, clogging prevention section 210 is formed by a shape in which a part of the wall surface of blocking section 220 is cut out. Furthermore, clogging prevention section 210 is formed by a shape in which a part of the wall surface of blocking section 220 is cut out by an arc-shaped notch arc 222. Also, the distance from the side opening base end BC of blocking section 210 to clogging prevention section 220 is shorter on the lower side than on the upper side (LU>LC).

[0028] 7, the clogging prevention section 610 may be formed by a shape in which a part of the wall surface of the blocking section 620 is cut out by a circular arc-shaped notch arc 622. In this drainage pipe joint 500, the cross-sectional area through which the drainage can flow (from the horizontal branch pipe to the drainage pipe joint 100) is larger on the lower side than on the upper side, and the clogging prevention section 610 is formed by a shape in which a part of the wall surface of the blocking section 620 is cut out, and the blocking section 610 is more specifically formed by an upper blocking section 610U and a lower blocking section 610D, and the clogging prevention section 610 is formed by a shape in which a part of the wall surface of the blocking section 620 is cut out by a circular arc-shaped notch arc 622.

[0029] These characteristics can also be explained as follows. As shown in Fig. 6(C), the wall surface of deflector plate 200, although it is only one example, can be configured to have a shape formed by an arc with a radius equal to the inner diameter (φd) of horizontal branch pipe connecting portion 120 and a chord of the arc, with part or all of the chord being cut out (here, a part of it is cut out by arc-shaped cutout arc 222, and in Fig. 7, the entire chord is cut out by arc-shaped cutout arc 622). Note that while in Fig. 6 the chord and the vertical axis of body 110 are parallel in side view, in Fig. 7 the chord and the vertical axis of body 110 are not parallel in side view.

[0030] In the drainage pipe joint 100 shown in Fig. 6, in the wall surface where a part of the chord is cut out (i.e., the blocking portion 210), the length of the remaining chord is shorter on the lower side than on the upper side (LU>LC). This means that in the wall surface where a part of the chord is cut out, the length of the remaining chord is shorter on the lower side (lower chord length LD) than on the upper side (upper chord length LC). Here, in Fig. 6, the length of the chord that is left after being cut out at the cutout arc 222 is indicated as LC.

[0031] Next, referring to FIG. 6, a technique common to the drain pipe joint 100 and the drain pipe joint 400 that can prevent clogging due to objects (solids) that obstruct the flow of drainage while having a sufficient drift function and suppressing an increase in manufacturing costs due to the absence of a bulging portion or the like will be described. In the following description, the drain pipe joint 400 will be used as a representative example.

[0032] As shown in FIG. 6, the radius R of the notched arc 222 is preferably 15% or more and 200% or less of the inner diameter φd of the lateral branch pipe connecting portion 120 . The radius R of the notch arc 222 is set to the inner diameter φd of the side branch pipe connecting portion 120 ( Based on the inner diameter φd of the portion 120, it is preferable that the thickness is 15% or more and 200% or less, and more preferably 19% or more and 19% or less. A value of 5% or less is particularly preferred.

[0033] As shown in FIG. 6, the maximum horizontal length L from the vertical axis to the notched arc 222 is preferably 3% to 40% of the inner diameter φd of the horizontal branch pipe connecting portion 120. In addition, the maximum horizontal length L from the vertical axis center to the notched arc 222 is preferably 3% to 40% of the inner diameter φd of the horizontal branch pipe connecting portion 120 (based on the inner diameter φd of the horizontal branch pipe connecting portion 120), and particularly preferably 4.8% to 35%.

[0034] 6, the center CC of the notched arc 222 is located below the inner diameter center C by a distance in the range of 1% to 30% of the inner diameter φd of the horizontal branch pipe connecting portion 120. In other words, the center CC of the notched arc 222 is located below the inner diameter center C by a distance in the range of a length DY in the range of 1% to 30% of the inner diameter φd. The center CC of the notched arc 222 is set to the inner diameter φd of the side branch pipe connecting portion 120 ( Based on the inner diameter φd of the connection portion 120, from the inner diameter center C, as described above, 1% to 30% It is preferably located at the lower end of the range, and particularly preferably at the lower end of the range of 6% to 10%.

[0035] 6, the center CC of the notched circular arc 222 is located to the side (opposite side of the drift plate 200) within a range of 1% to 170% from the inner diameter center C with respect to the inner diameter φd of the horizontal branch pipe connecting portion 120. In other words, the center CC of the notched circular arc 222 is located to the side (opposite side of the drift plate 200) within a range of a length DX of 1% to 170% with respect to the inner diameter φd from the inner diameter center C to the side (opposite side of the drift plate 200).

[0036] The center CC of the notched arc 222 is set to the inner diameter φd of the side branch pipe connecting portion 120 ( Based on the inner diameter φd of the connection portion 120, from the inner diameter center C, 1% to 170% as described above It is preferable that the deflector 200 is positioned to the side of the deflector 200 (the opposite side of the deflector 200) within this range, and it is particularly preferable that the deflector 200 is positioned to the side of the deflector 200 (the opposite side of the deflector 200) within this range of 3% or more and 20% or less. In addition, the cross-sectional shape of the notched arc 222 shown in the cross section of the deflection plate 200 shown in Figure 6 (D) is processed to have a rounded radius, and in the range LCD (the range from the inner diameter center C of the horizontal branch pipe connection portion 120 to the junction point between the notched arc 222 and the lower blocking portion 210D), the radius gradually increases downward from the inner diameter center C of the horizontal branch pipe connection portion 120 (for example, gradually changes from R2 to R3).

[0037] As described above, the drain pipe fitting 100, drain pipe fitting 400, and drain pipe fitting 500 of this embodiment can suppress an increase in manufacturing costs by not having a bulge portion or the like, while having a sufficient flow channeling function and preventing clogging due to objects (solids) that obstruct the flow of drainage. It should be noted that the embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Industrial Applicability]

[0038] The present invention is preferable for use in drainage pipe joints for drainage piping in high-rise apartment buildings, etc., and is particularly preferable in that it has sufficient drift function while being able to prevent clogging due to objects (solids) that obstruct the flow of drainage. [Explanation of symbols]

[0039] 100, 400, 500 Drainage pipe fittings 112 Side opening 114 Top opening 116 Lower opening 120 Horizontal branch pipe connection 140 Upper riser connection 160 Downstream pipe connection 200 Current plate 210 Breaking section 220 Clogging prevention section 300 Backflow prevention rib

Claims

1. A drainage pipe joint having a side opening on a side surface of a cylindrical body having a vertical axis, a horizontal branch pipe connection part provided in the side opening, and an upper riser pipe connection part and a lower riser pipe connection part provided in upper and lower openings of the body, The drainage piping joint is characterized in that the horizontal branch pipe connection portion has a circular cross-section centered on the horizontal axis of the horizontal branch pipe connection portion, and is equipped with a deflection plate including a wall surface that closes part of the left side or part of the right side of the circular cross-section to deflect the drainage flowing from the horizontal branch pipe into the side opening to either the left or right.

2. 2. A drainage pipe fitting as described in claim 1, characterized in that the horizontal branch pipe connection portion does not have a bulge portion that bulges in a direction away from the vertical axis at a position facing the deflection plate when viewed from the opening side of the upper and lower openings of the body portion.

3. 3. A drainage pipe joint according to claim 1, wherein the wall surface does not protrude into the body when viewed from the opening sides of the upper and lower openings of the body.

4. A drainage pipe joint as described in any one of claims 1 to 3, characterized in that the deflection plate comprises a blocking portion for blocking the drainage to cause the deflection, and a clogging prevention portion for preventing clogging of objects that obstruct the flow of the drainage.

5. 5. The drainage pipe joint according to claim 4, wherein the blocking portion comprises an upper blocking portion located higher than the clogging prevention portion and a lower blocking portion located lower than the clogging prevention portion.

6. The drainage pipe fitting described in claim 5, characterized in that the lower blocking section has at least one of the functions of draining the object into the body section by floating the object when the flow rate of the drainage is high, and the function of deflecting the drainage when the flow rate of the drainage is low.

7. A drainage pipe joint according to any one of claims 4 to 6, characterized in that the cross-sectional area through which the drainage can flow is larger on the lower side than on the upper side.

8. A drainage pipe joint according to any one of claims 4 to 7, characterized in that the clogging prevention portion is formed by cutting out a part of a wall surface of the blocking portion.

9. A drainage pipe joint according to any one of claims 4 to 7, characterized in that the clogging prevention portion is formed by a shape in which a part of a wall surface of the blocking portion is cut out by an arc-shaped notch arc.

10. A drainage pipe joint as described in any one of claims 4 to 9, characterized in that the distance from the base end of the side opening in the blocking portion to the clogging prevention portion is shorter on the lower side than on the upper side.

11. 10. The drainage pipe joint according to claim 9, wherein the radius of the notched arc is 15% or more and 200% or less of the inner diameter of the horizontal branch pipe connection portion.

12. 10. The drainage pipe joint according to claim 9, wherein a horizontal maximum length from the vertical axis to the notched arc is 3% to 40% of an inner diameter of the horizontal branch pipe connection portion.

13. 10. The drainage pipe joint according to claim 9, wherein the center of the notched arc is located below the center of the inner diameter of the horizontal branch pipe connection portion in a range of 1% to 30%.

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