JP2022061254A - Drainage piping joint - Google Patents

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

The present invention relates to a drainage pipe joint used for drainage pipes of a high-rise apartment building or the like, and particularly describes an object (dirt, toilet paper, etc., which is a solid matter) that obstructs the flow of drainage while having a sufficient drift function. Regarding drainage pipe joints that can prevent clogging due to (may be).

Water supply and drainage facilities will be installed in apartment buildings and office buildings. Of these, the drainage facility is typically a drainage pipe structure equipped with vertical pipes that run vertically through each floor of the building, horizontal pipes installed in each floor, and drainage pipe joints that connect them. Widely known as.
As a drainage pipe joint for connecting these vertical pipes and horizontal pipes, a side opening is provided on the side surface of a tubular body having a vertical axis center, and a horizontal branch pipe connection is provided on the side opening. In general, an upper vertical pipe connection portion and a lower vertical pipe connection portion are provided at the upper and lower openings of the body portion. When such a drainage pipe joint is used for drainage pipes of high-rise apartments, etc., as various conditions other than the drainage capacity, the flow of drainage containing filth and the diameter of the passing ball of the branch pipe inflow portion is larger than a predetermined value. The obstacles (solid matter) are not clogged, and the washing drainage performance is excellent.

Japanese Patent Application Laid-Open No. 2004-092262 (Patent Document 1) relating to another application by the applicant of the present application discloses a drainage collecting pipe satisfying such conditions. The drainage collecting pipe disclosed in Patent Document 1 has a side opening on the side surface of a tubular body having a vertical axis center, and the side opening is provided with a lateral branch pipe connection portion. In a drainage collecting pipe in which an upper vertical pipe connection portion and a lower vertical pipe connection portion are provided at the upper and lower openings of the body portion, drainage flowing down from above on the inner surface of the body portion above the side opening is the side opening. When the backflow prevention portion that prevents backflow to the portion is formed so as to project inward in the diameter of the body portion, and the side opening is viewed from the axial center of the body portion on the inner surface of the body portion above the backflow prevention portion. On the left side, an axial center drift portion that causes drainage flowing down from above to flow toward the body axis side is projected and molded in the inward direction of the body portion, and the amount of protrusion of the axis center drift portion is the protrusion of the backflow prevention portion. It is characterized in that it is made larger than the amount (claim 1 of Patent Document 1). Further, in this drainage collecting pipe, the drainage flowing from the lateral branch pipe to the side opening is sent to the lateral branch pipe connection portion on the left side when the side opening is viewed from the axial center of the body portion. It is characterized in that a side drift portion for drifting is provided (claim 2 of Patent Document 1). Further, in this drainage collecting pipe, when the side opening is viewed from the axial center of the body, the left side surface of the lateral branch pipe connecting portion is characterized by having a bulging portion bulging to the left. (Claim 6 of Patent Document 1).

Japanese Unexamined Patent Publication No. 2004-09226

In the drainage collecting pipe disclosed in Patent Document 1 described above, since the drainage flowing from the lateral branch pipe is directed sideways by providing a side drift portion, even a large amount of drainage from a toilet or the like can be treated. , It can be smoothly merged with the drainage flowing down from the standing pipe, and when the side opening is seen from the axis center of the body, the left side surface of the lateral branch pipe connection part is a bulging part bulging to the left side. Therefore, the diameter of the ball passing through the branch pipe inflow portion is larger than a predetermined value, and an object (solid matter) that obstructs the flow of drainage including filth is prevented from being clogged.

As described above, the drainage collecting pipe disclosed in Patent Document 1 has a sufficient drift function, and can prevent clogging due to an object (solid matter) that obstructs the flow of drainage, and has high-performance drainage. Although it has been well received for its performance, it is provided with a side drift section to direct the drainage flowing in from the lateral branch pipe sideways, and it flows down from the standing pipe even for a large amount of drainage from toilet bowls. While it is designed to smoothly merge with the drainage, the left side surface of the branch pipe connection part, which is located facing the side drifting part, is provided with a bulging part bulging to the left side and is clogged with solid matter. Is prevented. Therefore, since it is necessary to provide this bulging portion, the structure of the drainage collecting pipe disclosed in Patent Document 1 becomes complicated (compared to a substantially circular structure having no bulging portion), and the manufacturing cost increases. The fear can be pointed out.

The present invention has been developed in view of the above-mentioned problems, and an object of the present invention is a drainage pipe joint used for drainage pipes of high-rise apartment buildings, etc., while having a sufficient drift function. It is an object of the present invention to provide a drainage pipe joint capable of preventing clogging due to an object (solid matter) that obstructs the flow of drainage.

In order to achieve the above object, the drainage pipe joint according to the present invention takes the following technical measures.
That is, the drainage pipe joint according to the present invention has a side opening on the side surface of a tubular body having a vertical axis center, and a lateral branch pipe connecting portion is provided in the side opening, and the body is provided. It is a drainage pipe joint in which an upper pipe connection portion and a lower pipe connection portion are provided in the upper and lower openings, respectively. It has a circular cross section centered on the horizontal axis, and a part of the left side or a part of the right side of the circular cross section is closed in order to allow the drainage flowing from the lateral branch pipe to the side opening to flow to the left or right. It is characterized by including a drift plate configured to include a wall surface.

Preferably, the lateral branch pipe connecting portion does not have a bulging portion that bulges in a direction away from the center of the vertical axis at a position facing the drift plate when viewed from the opening side of the upper and lower openings of the body portion. Can be configured as follows.
More preferably, the wall surface can be configured so as not to protrude into the body portion when viewed from the opening side of the upper and lower openings of the body portion.

More preferably, the drift plate comprises a blocking portion for generating the drift by blocking the drainage and a clogging prevention portion for preventing clogging of an object that obstructs the flow of the drainage. Can be configured.
More preferably, the blocking portion can be configured to include an upper blocking portion at a position higher than the clogging prevention portion and a lower blocking portion at a lower position.

More preferably, the lower blocking portion has a function of draining the object into the body by suspending the object when the flow rate of the drainage is high, and a drifting of the drainage when the flow rate of the drainage is low. It can be configured to have at least one of the functions to be caused.
More preferably, the cross-sectional area through which the wastewater can flow can be configured so that the lower side is larger than the upper side.

More preferably, the clogging prevention portion can be configured so that a part of the wall surface of the blocking portion is formed in a notched shape.
More preferably, the clogging prevention portion can be configured so that a part of the wall surface of the blocking portion is formed by a shape notched by an arcuate notched arc.
More preferably, the distance from the base end of the side opening to the clogging prevention portion in the blocking portion can be configured to be shorter on the lower side than on the upper side.

More preferably, the radius of the notch arc can be configured to be 15% or more and 200% or less with respect to the inner diameter of the lateral branch pipe connecting portion.
More preferably, the maximum horizontal length from the vertical axis center to the notched arc can be configured to be 3% or more and 40% or less with respect to the inner diameter of the lateral branch pipe connecting portion.
More preferably, the center of the notch arc can be configured to be located below the inner diameter of the lateral branch pipe connection portion within a range of 1% or more and 30% or less from the center of the inner diameter.

According to the present invention, it is a drainage pipe joint used for drainage pipes of high-rise apartments and the like, and it is possible to prevent clogging by an object (solid matter) that obstructs the flow of drainage while having a sufficient drift function. Drainage pipe fittings can be provided.

It is (A) top view and (B) side view which show the drainage pipe structure which adopted the drainage pipe joint 100 which concerns on embodiment of this invention. It is an exploded perspective view which shows the drainage pipe structure which adopted the drainage pipe joint 100 which concerns on embodiment of this invention. It is a side view of the drainage pipe joint 100. (A) External perspective view (side) of the drainage pipe joint 100, (B) External perspective view (from bottom to top) of the drainage pipe joint 100. It is sectional drawing of the drainage pipe joint which looked at the side opening 112 from the body part 110, and (A) in the drainage pipe joint 100 provided with the drift plate 200, the virtual passing sphere which can flow from a lateral branch pipe to a side opening. It is a figure which shows (B) the virtual passing sphere which can flow into a side opening from a lateral branch pipe in a drainage pipe joint 102 provided with the drift plate 202 different from the drift plate 200. (A) side view, (B) 6B sectional view in FIG. 6 (A), (C) enlarged drift plate of the drainage pipe joint 400 having the same technical features as the drainage pipe joint 100 according to the embodiment of the present invention. FIG. 6 (D) is a 6D enlarged view in FIG. 6 (B). It is a side view of the drainage pipe joint 500 which concerns on the modification of embodiment of this invention.

In the following, with reference to FIGS. 1 to 5 regarding the drainage pipe joint 100 according to the embodiment of the present invention, the drainage pipe joint 400 having the same technical features as the drainage pipe joint 100 according to the embodiment of the present invention. The drainage pipe joint 500 according to the modified example of the embodiment of the present invention will be described in detail with reference to FIG. 6. The drainage pipe joint 100 and the drainage pipe joint 400, which have common technical features, have the same reference numerals for the reference numerals in the drawings for the common technical features, and the common technical features are the drainage pipe joints. It may be described by using either 100 or the drainage pipe joint 400.

Here, the drainage pipe joint 100 is provided with the horizontal branch pipe connection portion 120 in three directions, whereas the drainage pipe joint 400 and the drainage pipe joint 500 are provided with the horizontal branch pipe connection portion 120 in only one direction. The drainage pipe joint according to the present invention is not particularly limited as long as it includes one or more lateral branch pipe connection portions in addition to the upper stand pipe connection portion and the lower stand pipe connection portion. In addition, due to the number of lateral branch pipe connection portions, the presence or absence of the backflow prevention rib 300 for preventing backflow from one lateral branch pipe to another lateral branch pipe (in the first place, the lateral branch pipe connection portion is only in one direction). The drainage pipe joint 400 and the drainage pipe joint 500 that do not have the 120 do not require the backflow prevention rib 300) and the number of the backflow prevention ribs 300 is different, which will be described later. Here, the case where the backflow prevention rib (backflow prevention part, backflow prevention plate) has a function of preventing the drainage flowing down from above from flowing back to the side opening is not limited to this, and the lateral branch pipe is available only in one direction. Even the drainage pipe joint 400 and the drainage pipe joint 500 that do not have the connection portion 120 may be provided with the backflow prevention rib. The backflow prevention rib 300 in the present embodiment prevents backflow from one lateral branch pipe to another lateral branch pipe, and has low relevance to the technical features of the present invention. Therefore, it is a drainage pipe. The backflow prevention rib 300 provided in the joint 100 will be described as not provided in the drainage pipe joint 400 and the drainage pipe joint 500.

Further, the technical feature common to the drainage pipe joint 100 and the drainage pipe joint 400 is a structure capable of preventing clogging by an object (solid matter) that obstructs the flow of drainage while having a sufficient drift function. Therefore, it will be described in detail with reference mainly to FIG. Here, the outline of the common technical features is shown below. The outline of the common technical features is that the drainage pipe joint 100 and the drainage pipe joint 400 have a circular cross section (here, a circular cross section) in which the lateral branch pipe connecting portion 120 is centered on the lateral axis of the lateral branch pipe connecting portion 120. As an example, it means that it does not have a bulging portion as disclosed in Patent Document 1 bulging from a circular cross section), and drainage flowing from the lateral branch pipe to the side opening 112 is either left or right. The drift plate 200 is configured to include a wall surface that closes a part of the left side or a part of the right side of the circular cross section for drifting to, and more limitedly, the drift plate 200 blocks drainage. It is provided with a blocking portion 210 for generating uneven flow and a clogging preventing portion 220 for preventing clogging of an object that obstructs the flow of drainage, and the clogging preventing portion 220 forms a part of the wall surface of the blocking portion 210 in an arc shape. It is a point formed by the shape notched by the notched arc 222 of.

Here, the figures shown in FIGS. 1 to 7 are schematically shown including the case where the low configuration and the like related to the present invention are omitted, and the consistency between the figures is completely complete. It may not match.
As shown in FIGS. 1 and 2, in the drainage pipe structure using the drainage pipe joint 100 according to the embodiment of the present invention, a part thereof is provided in a through hole that vertically penetrates the floor slab S in the building. Above the drainage pipe joint 100 and the upper floor side connected to the upper pipe connection portion 140 of the drainage pipe joint 100 above the floor slab S (via the upper pipe connection member) to allow drainage from the upper floor to flow in. A vertical pipe and a horizontal branch pipe (here, three each) connected to the horizontal branch pipe connection portion 120 of the drainage pipe joint 100 above the floor slab S (via the horizontal pipe connection member). Below the floor slab S, there is a lower floor side lower pipe (diameter pipe with swivel blade and straight pipe) that is connected to the lower pipe connection portion 160 of this drainage pipe joint 100 and allows drainage to flow out to the lower floor. ing. Although the drainage pipe structure using the drainage pipe joint 100 is shown to be adopted on a floor other than the lowest floor, the drainage pipe structure using the drainage pipe joint 100 according to the present embodiment is also used on the lowest floor. In the case of the lowest floor that can be adopted, an example is that the lower pipe is composed of a lower pipe (straight pipe) and a 90-degree bend pipe. It should be noted that these drainage pipe structures are only examples, and the drainage pipe joint 100 according to the present invention is not adopted only for the illustrated drainage pipe structure. Here, the vibration damping material, the vibration insulator, and the sound insulation provided in the lower vertical pipe (diameter-reduced pipe with swivel blade), which have low relevance to the present invention because they have low relevance to the technical features of the present invention. The cover etc. will not be explained.

As shown in FIGS. 1 to 5, the drainage pipe joint 100 is a side surface of a tubular body portion 110 having a vertical axis center (hereinafter, the tubular body portion 110 may be simply referred to as a body portion 110). The side opening 112 is provided with a lateral branch pipe connecting portion 120 in the side opening 112, and an upper pipe connecting portion is provided in the upper and lower openings (upper opening 114 and lower opening 116) of the body portion 110. A 140 and a lower pipe connecting portion 160 are provided, respectively. As described above, in the drainage pipe joint 100 shown in FIGS. 1 to 5, the side opening 112 and the lateral branch pipe connecting portion 120 provided therein are provided at three locations at 90 ° intervals in a plan view, and FIG. In the drainage pipe joint 400 shown in FIG. 7 (the same applies to the drainage pipe joint 500 according to the modified example shown in FIG. 7), the side opening 112 and the lateral branch pipe connection portion 120 provided therein are provided only at one place.

The drainage pipe joint 100 has a circular cross section in which the lateral branch pipe connecting portion 120 has a circular cross section centered on the horizontal axis of the lateral branch pipe connecting portion 120, and drains water flowing from the lateral branch pipe into the side opening 112. It comprises a drift plate 200 configured to include a wall surface that closes a portion of the left side or a portion of the right side of the circular cross section for drifting to either the left or right. In the present embodiment, as shown in FIGS. 5 and 6, the drift plate 200 has a wall surface (more specifically, a blocking portion 210) that closes a part of the left side of the circular cross section of the lateral branch pipe connecting portion 120. It is configured to include a clogging prevention unit 220). This is because the drainage pipe joint 100 is provided with a swivel blade as shown in FIG. 2 in the drainage pipe joint 100 on each floor, and turns counterclockwise when the upper pipe or the lower pipe is viewed from vertically above. A flow is generated (in FIGS. 4B and 6B, the swirling flow is expressed clockwise because the drainage pipe joint 100 is looked up from below), and the drainage from the lateral branch pipe is discharged. By drifting to the right side (by stopping or weakening the flow on the left side), the drainage from the lateral branch pipe can be merged with the drainage that swirls counterclockwise from above and flows down.

Here, the lateral branch pipe connecting portion 120 has a tubular body portion 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 portion 110. It does not have a bulge that bulges in the direction away from the center of the vertical axis of. That is, in this drainage pipe joint 100, the lateral branch pipe connecting portion 120 has a circular cross section centered on the horizontal axis of the lateral branch pipe connecting portion 120 and bulges from the circular cross section (disclosure in Patent Document 1 as an example). It means that it does not have a bulge (as was done). Therefore, since it is not necessary to provide such a bulging portion, the cross-sectional structure of the body portion 100 of the drainage pipe joint 100 becomes a substantially circular structure, which can be simplified and the possibility of increasing the manufacturing cost can be suppressed. It should be noted that the point that clogging by an object (solid substance) that obstructs the flow of drainage can be prevented even if such a bulging portion is not provided will be described later.

Further, the wall surface constituting the drift plate 200 does not protrude into the body portion 110 when viewed from the opening side of the upper and lower openings (upper opening 114 and lower opening 116) of the body portion 110. That is, in the drainage pipe joint 100, the lateral branch pipe connecting portion 120 has a circular cross section centered on the horizontal axis of the lateral branch pipe connecting portion 120, and the wall surface constituting the drift plate 200 is shown in FIG. 3 or FIG. It means that it does not protrude into the body portion 110 like the backflow prevention rib 300 shown in 4. Therefore, since it is not necessary to project the drift plate 200 into the body portion 110, the cross-sectional structure of the body portion 100 of the drainage pipe joint 100 becomes a substantially circular structure, which may be simplified and the manufacturing cost may increase. In addition to being able to suppress it, it is possible to suppress the obstruction of the flow of drainage flowing down from the top to the bottom of the body 110 because the drift plate 200 does not protrude into the body 110. As described above, the drift plate 200 for allowing the drainage flowing from the lateral branch pipe to the side opening 112 to flow unevenly to either the left or right does not protrude into the body portion 110, and the wall surface of the drift plate 200 is the body portion. The point that the shape is extended along the circular cross section of the above-mentioned is a feature that is significantly different from the above-mentioned backflow prevention rib and the conventional drift plate.

More specifically, the drift plate 200 has a cutoff portion 210 (more specifically, an upper cutoff portion 210U) for generating a drift by blocking the drainage (from the lateral branch pipe to the body portion 110 of the drainage pipe joint 100). And the lower cutoff section 210D) and clogging to prevent clogging of objects (dirt, solid matter such as toilet paper) that obstruct the flow of drainage (from the lateral branch pipe to the body 110 of the drainage pipe joint 100). It is composed of a prevention unit 220. In order for the drift plate 200 to include such a clogging prevention portion 220, clogging by an object (solid matter) that obstructs the flow of drainage even if it does not have the bulging portion as disclosed in Patent Document 1 as described above. Can be prevented.

More specifically, it will be described with reference to FIG. 5, which is a cross-sectional view of the drainage pipe joint 100 in which the side opening 112 is seen from the body 110 (the outside of the drainage pipe joint 100 is viewed from the center of the vertical axis). FIG. 5A shows a virtual passing sphere (diameter PB (1)) capable of flowing from the lateral branch pipe to the side opening in the drainage pipe joint 100 provided with the drift plate 200 having the clogging prevention portion 220, and is shown in FIG. 5 (A). B) is a drift plate 202 different from the drift plate 200, and is a virtual passing sphere (diameter) capable of flowing from the lateral branch pipe to the side opening in the drainage pipe joint 102 provided with the drift plate 202 having no clogging prevention portion 220. PB (2)) is shown. Virtual passage when the inner diameter φd of the lateral branch pipe connecting portion 120 is 102.8 mm (when the lateral branch pipe connecting portion 120 side connects the lateral branch pipe connecting member having a nominal diameter of 100 to the lateral branch pipe connecting portion 120). The diameter PB (1) of the sphere is 68 mm, while the diameter of PB (2) is 60 mm, which is an improvement of 13.3%.

More specifically, as shown in FIG. 6, the blocking portion 210 includes an upper blocking portion 210U located at a position higher than the clogging prevention portion 220 and a lower blocking portion 210D located at a position lower than the clogging prevention portion 220. As a matter of course, the upper cutoff portion 210U is located above the lower cutoff portion 210D (above the clogging prevention portion 220).
The lower cutoff portion 210U has a function of draining an object (solid material) into the body 110 when the flow rate of drainage (from the lateral branch pipe to the drainage pipe joint 100) is large, and (horizontal). It has at least one of the functions of causing the drainage to flow unevenly when the flow rate of the drainage (from the branch pipe to the drainage pipe joint 100) is low. As a result, even if the flow rate of drainage from the horizontal branch pipe to the drainage pipe joint 100 is small, the flow rate of drainage from the horizontal branch pipe to the drainage pipe joint 100 is large while having a sufficient drift function. It is possible to prevent clogging due to an object (solid matter) that obstructs the flow of wastewater.

As shown in FIGS. 3 to 6, the cross-sectional area through which drainage (from the lateral branch pipe to the drainage pipe joint 100) can flow is larger on the lower side than on the upper side. Further, the clogging prevention portion 210 is formed by a shape in which a part of the wall surface of the blocking portion 220 is cut out. Further, the clogging prevention portion 210 is formed by a shape in which a part of the wall surface of the cutoff portion 220 is cut out by an arcuate notch arc 222. Further, the distance from the base end BC of the side opening in the blocking portion 210 to the clogging prevention portion 220 is shorter on the lower side than on the upper side (LU> LC).

As in the drainage pipe joint 500 according to the modified example shown in FIG. 7, the clogging prevention portion 610 is formed by a shape in which a part of the wall surface of the cutoff portion 620 is cut out by an arcuate notch arc 622. It doesn't matter. Even in this drainage pipe joint 500, the cross-sectional area through which drainage (from the horizontal branch pipe to the drainage pipe joint 100) can flow is larger on the lower side than on the upper side, and further, the clogging prevention portion 61.
0 is formed by a shape in which a part of the wall surface of the cutoff portion 620 is cut out, and the cutoff portion 610 is more specifically formed by the upper cutoff portion 610U and the lower cutoff portion 610D. A part of the wall surface of the 620 is formed by a shape notched by an arc-shaped notched arc 622.

These features can also be explained as follows.
As shown in FIG. 6C, the wall surface of the drift plate 200 is formed by an arc having an inner diameter (φd) of the lateral branch pipe connecting portion 120 as a radius and a string of the arc, which is an example. A part or all of the strings can be configured to have a notched shape (here, partly by an arcuate notch arc 222, in FIG. 7 all by an arcuate notch arc 622). .. In FIG. 6, the string and the vertical axis center of the body 110 are parallel in the side view, but in FIG. 7, the string and the vertical axis center of the body 110 are not parallel in the side view.

In the drainage pipe joint 100 shown in FIG. 6, the length of the remaining string is shorter on the lower side than on the upper side (LU> LC) on the wall surface (that is, the cutoff portion 210) in which a part of the string is cut out. This is because the length of the remaining string is shorter on the lower side (lower string length LD) than on the upper side (upper string length LC) on the wall surface where a part of this string is cut out. Means that. Here, in FIG. 6, the length of the string left after being cut out in the notched arc 222 is shown by LC.

Next, with reference to FIG. 6, an object (solid substance) that hinders the flow of wastewater while having a sufficient drift function while suppressing an increase in manufacturing cost due to the absence of a bulging portion or the like. ), The technical features common to the drainage pipe joint 100 and the drainage pipe joint 400, which can prevent clogging due to), will be described in detail. In the following description, the drainage pipe joint 400 will be described as a representative.

As shown in FIG. 6, the radius R of the notch arc 222 is preferably 15% or more and 200% or less with respect to the inner diameter φd of the lateral branch pipe connecting portion 120.
The radius R of the notch arc 222 is preferably 15% or more and 200% or less, and 19% or more and 195% or less with respect to the inner diameter φd of the lateral branch pipe connecting portion 120 (based on the inner diameter φd of the lateral branch pipe connecting portion 120). Is particularly preferable.

Further, as shown in FIG. 6, the maximum horizontal length L from the center of the vertical axis to the notch arc 222 is preferably 3% or more and 40% or less with respect to the inner diameter φd of the lateral branch pipe connecting portion 120.
The maximum horizontal length L from the center of the vertical axis to the notch arc 222 is 3% or more and 40% or less with respect to the inner diameter φd of the lateral branch pipe connecting portion 120 (based on the inner diameter φd of the lateral branch pipe connecting portion 120). Is preferable, and 4.8% or more and 35% or less are particularly preferable.

Further, as shown in FIG. 6, the center CC of the notch arc 222 is located below the inner diameter φd of the lateral branch pipe connecting portion 120 within a range of 1% or more and 30% or less from the inner diameter center C. That is, the center CC of the notch arc 222 is located downward from the center C of the inner diameter within a range of a length DY of 1% or more and 30% or less with respect to the inner diameter φd.
The center CC of the notch arc 222 is 1% or more and 30% or less from the inner diameter center C (based on the inner diameter φd of the lateral branch pipe connecting portion 120) with respect to the inner diameter φd of the lateral branch pipe connecting portion 120. It is preferably located below the range, and particularly preferably below the range of 6% or more and 10% or less.

Further, as shown in FIG. 6, the center CC of the notch arc 222 is lateral to the inner diameter φd of the lateral branch pipe connecting portion 120 within a range of 1% or more and 170% or less from the inner diameter center C (reverse of the drift plate 200). Located on the side). That is, the center CC of the notch arc 222 is lateral (on the opposite side of the drift plate 200) from the center C of the inner diameter to the side (opposite side of the drift plate 200) within a range of length DX of 1% or more and 170% or less with respect to the inner diameter φd. Located on the opposite side).

The center CC of the notch arc 222 is 1% or more and 170% or less from the inner diameter center C (based on the inner diameter φd of the lateral branch pipe connecting portion 120) with respect to the inner diameter φd of the lateral branch pipe connecting portion 120. It is preferably located on the side of the range (opposite side of the drift plate 200), and particularly preferably located on the side of the range of 3% or more and 20% or less (opposite side of the drift plate 200).
Further, the cross-sectional shape of the notch arc 222 shown in the cross section of the drift plate 200 shown in FIG. 6 (D) is R (rounded), and is notched from the center C of the inner diameter of the range LCD (horizontal branch pipe connection portion 120). In the range up to the junction between the arc 222 and the lower cutoff portion 210D), its R gradually increases downward from the inner diameter center C of the lateral branch pipe connecting portion 120 (for example, it is gradually changed from R2 to R3). ).

As described above, according to the drainage pipe joint 100, the drainage pipe joint 400, and the drainage pipe joint 500 according to the present embodiment, the manufacturing cost is suppressed from increasing because the bulging portion and the like are not provided. While having a sufficient drift function, it is possible to prevent clogging due to an object (solid matter) that obstructs the flow of wastewater.
It should be noted that the embodiments disclosed this time are exemplary in all respects and are not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

The present invention is preferable for drainage pipe joints used for drainage pipes in high-rise apartment buildings, etc., and is capable of preventing clogging due to an object (solid matter) that obstructs the flow of drainage while having a sufficient drift function. Especially preferable.

100, 400, 500 Drainage pipe joint 112 Side opening 114 Upper opening 116 Lower opening 120 Horizontal branch pipe connection 140 Upper pipe connection 160 Lower pipe connection 200 Diversion plate 210 Cutoff 220 Clog prevention part 300 Backflow prevention rib

Claims (13)

A side opening is provided on the side surface of a tubular body having a vertical axis center, a lateral branch pipe connection portion is provided at the side opening, and an upper pipe connection portion is provided at the upper and lower openings of the body. It is a drainage pipe joint provided with a lower pipe connection part, respectively.
In the drainage pipe joint, the lateral branch pipe connecting portion has a circular cross section centered on the horizontal axis of the lateral branch pipe connecting portion, and the drainage flowing from the lateral branch pipe to the side opening is either left or right. A drainage pipe joint comprising a drift plate configured to include a wall surface that closes a portion of the left side or a portion of the right side of the circular cross section for drifting. The lateral branch pipe connecting portion is characterized in that it does not have a bulging portion that bulges in a direction away from the center of the vertical axis at a position facing the drift plate when viewed from the opening side of the upper and lower openings of the body portion. The drainage pipe joint according to claim 1. The drainage pipe joint according to claim 1 or 2, wherein the wall surface does not protrude into the body portion when viewed from the opening side of the upper and lower openings of the body portion. The drift plate is characterized by comprising a blocking portion for generating the drift by blocking the drainage and a clogging prevention portion for preventing clogging of an object that obstructs the flow of the drainage. The drainage pipe joint according to any one of claims 1 to 3. The drainage pipe joint according to claim 4, wherein the cutoff portion includes an upper cutoff portion at a position higher than the clogging prevention portion and a lower cutoff portion at a lower position. The lower blocking portion has at least a function of draining the object into the body portion by suspending the object when the flow rate of the drainage is high and a function of causing the drainage to flow unevenly when the flow rate of the drainage is low. The drainage pipe joint according to claim 5, wherein the drainage pipe joint has any of the functions. The drainage pipe joint according to any one of claims 4 to 6, wherein the cross section through which the drainage can flow is larger on the lower side than on the upper side. The drainage pipe joint according to any one of claims 4 to 7, wherein the clogging prevention portion is formed by a shape in which a part of the wall surface of the cutoff portion is cut out. The drainage according to any one of claims 4 to 7, wherein the clogging prevention portion is formed by a shape in which a part of the wall surface of the blocking portion is cut out by an arc-shaped notched arc. Plumbing fittings. The drainage pipe joint according to any one of claims 4 to 9, wherein the distance from the base end portion of the side opening in the cutoff portion to the clogging prevention portion is shorter on the lower side than on the upper side. .. The drainage pipe joint according to claim 9, wherein the radius of the notch arc is 15% or more and 200% or less with respect to the inner diameter of the lateral branch pipe connection portion. The drainage pipe according to claim 9, wherein the maximum horizontal length from the vertical axis center to the notch arc is 3% or more and 40% or less with respect to the inner diameter of the lateral branch pipe connection portion. Fittings. The drainage pipe joint according to claim 9, wherein the center of the notch arc is located below the inner diameter of the lateral branch pipe connection portion within a range of 1% or more and 30% or less from the center of the inner diameter. ..

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