JP7107686B2 - Drainage header and piping structure - Google Patents

Description

The present invention relates to drainage headers and piping structures.

Conventionally, for example, a drainage header described in Patent Document 1 below is known. The drainage header is connected to the drainage system via a drainage branch.

Japanese Patent Application Laid-Open No. 2001-220789

However, the conventional drainage header has room for improving dirt clogging.

SUMMARY OF THE INVENTION The present invention has been made in view of the circumstances described above, and an object of the present invention is to improve clogging with dirt.

In order to solve the above problems, the present invention proposes the following means.
A drainage header according to the present invention is a drainage header connected to a plurality of drainage facilities via a plurality of drainage branch pipes, wherein a plurality of openings connected to the plurality of drainage branch pipes are formed on a side surface. and a plug that closes an upstream end in the axial direction of both ends of the header main body along the axial direction of the header, wherein the plug closes the tube. The end surface facing the downstream side in the axial direction includes a protruding portion that protrudes toward the downstream side below a first opening positioned on the most upstream side among the plurality of openings, the protruding portion comprising: A first guide portion is provided that extends along the opening edge of the first opening in a vertical cross-sectional view including the pipe axis of the drainage header.

In this case, the end face of the plug is provided with an overhang. Therefore, even if contaminants run up from the downstream side to the upstream side in the header body, the contaminants will not accumulate on the portion of the tube bottom of the header body that is located upstream of the first opening. can be suppressed by the overhang. Here, when the filth is deposited downstream of the first opening, the filth can be washed away downstream by the wastewater flowing in from the first opening, but the filth is deposited more downstream than the first opening. If it is deposited upstream, it is difficult to wash it away in this way. Therefore, as described above, by suppressing the accumulation of waste on the upstream side of the first opening by the projecting portion, it is possible to suppress the deposition of waste that has flowed up the inside of the header main body on the bottom of the pipe of the header main body. can be done.
The overhang also has a first guide. Therefore, it is possible to guide the filth that flows into the header body from the first opening toward the downstream side by the first guide portion. As a result, it is possible to prevent dirt that flows into the header body from the first openings from accumulating on the bottom of the header body.
As described above, according to this drainage header, it is possible to prevent dirt that has flowed up in the header body and dirt that has flowed into the header body from the first openings from accumulating on the bottom of the header body. As a result, for example, it is possible to prevent dirt from accumulating on the bottom of the tube and clogging the first opening, thereby improving clogging with dirt.

The protruding portion may further include a second guide portion that extends downward and downstream from the first guide portion and is spaced downward from the opening edge of the first opening in the vertical cross-sectional view.

In this case, the projecting portion further includes a second guide portion in addition to the first guide portion. Therefore, the filth that flows into the header body from the first opening and flows down from the first opening toward the pipe bottom of the header body can be guided downstream by the second guide portion. As a result, clogging with dirt can be further improved.

In the vertical cross-sectional view, the first opening has a circular shape, the first guide portion has a curved shape that protrudes toward the upstream side, and the second guide portion protrudes toward the downstream side. and the first guide portion and the second guide portion may be connected via an inflection portion.

In this case, in the vertical cross-sectional view, the first guide portion has a curved shape protruding toward the upstream side. Therefore, for example, compared to the case where the first guide portion does not protrude toward the upstream side, it is possible to easily increase the volume of the drainage header.
In addition, in the vertical cross-sectional view, the second guide portion has a curved shape protruding toward the downstream side. Thereby, for example, compared with the case where the second guide portion does not protrude toward the downstream side, the inclination of the second guide portion in the vertical cross-sectional view can be easily made steeper.
Furthermore, the first guide portion and the second guide portion are connected via the inflection portion. Therefore, it becomes possible to form the overhanging portion smoothly, and for example, it is possible to prevent dirt from being caught on the overhanging portion.
As described above, clogging with dirt can be further improved.

In the vertical cross-sectional view, the projecting portion may be positioned upstream of the opening axis of the first opening.

In this case, in the vertical cross-sectional view, the projecting portion is located upstream of the opening axis of the first opening. Therefore, even though the plug body is provided with the overhanging portion, it is possible to prevent the overhanging portion from overhanging into the header body and reducing the volume of the drainage header too much. As a result, for example, even when a large amount of wastewater flows into the drainage header, it is possible to make it difficult to fill the inside of the drainage header with water, and to suppress backflow of the drainage.

The end face may further include a drooping portion extending downward from the inner peripheral surface of the header main body and continuing to the upper end of the projecting portion in the vertical cross-sectional view.

In this case, the end face of the plug is provided with a hanging portion. Therefore, the position of the projecting portion can be lowered by the amount of the hanging portion. As a result, for example, the drainage branch pipe connected to the first opening (hereinafter referred to as "first drainage branch pipe") can be lowered downward, and the drainage gradient of the first drainage branch pipe can be reduced. It is possible to secure the underfloor fitability of the first drainage branch pipe while ensuring the same.

A piping structure according to the present invention includes a plurality of drainage branch pipes connected to each of a plurality of drainage facilities, and the drainage header connected to each of the plurality of drainage facilities via the plurality of drainage branch pipes. ing.

In this case, since the plug includes the drainage header having the projecting portion, it is possible to improve clogging with dirt.

The plurality of drainage branch pipes may include a first drainage branch pipe connected to the first opening, and a water-saving toilet serving as the drainage facility may be connected to the first drainage branch pipe.

In this case, the first drainage branch pipe has a small amount of drainage, and the drainage header is likely to clog with sewage. is connected. Therefore, it is possible to remarkably achieve the function and effect of being able to suppress clogging with dirt as described above.

According to the present invention, dirt clogging can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the piping structure which concerns on 1st Embodiment of this invention. FIG. 2 is a perspective view of a drainage header that constitutes the piping structure shown in FIG. 1; FIG. 3 is a perspective view showing a first divided body that constitutes the drainage header shown in FIG. 2; Figure 3 is a cross-sectional view of the drainage header shown in Figure 2; FIG. 5 is a cross-sectional view taken along the line AA shown in FIG. 4; FIG. 3 is a perspective view of a plug that constitutes the drainage header shown in FIG. 2; FIG. 7 is a perspective view of the plug shown in FIG. 6 cut in longitudinal section and viewed from an angle different from that in FIG. 6; FIG. 7 is a perspective view showing a first divided body that constitutes a drainage header in the piping structure according to the second embodiment of the present invention; FIG. 5 is a cross-sectional view of a drainage header in a piping structure according to a second embodiment of the present invention; FIG. 10 is a cross-sectional view taken along the line BB shown in FIG. 9;

(First embodiment)
Hereinafter, a piping structure 1 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 7. FIG.
As shown in FIG. 1, the piping structure 1 is used, for example, as a residential drainage system for treating residential drainage. The piping structure 1 is arranged, for example, under the floor or inside the walls of a building 3 constructed in the residential land 2, and treats wastewater discharged from a plurality of drainage facilities 4 inside the building 3. The piping structure 1 discharges wastewater from a plurality of drainage facilities 4 to, for example, a drainage basin 5 arranged within the residential lot 2 of the building 3 . The wastewater discharged into the drainage basin 5 is discharged through the public basin 6 to a sewage main (not shown).

In this embodiment, a water-saving toilet 4a, a bathtub 4b, a washing machine 4c, a washroom 4d, and a sink 4e are provided in the building 3 as the drainage equipment 4. FIG.
The water-saving toilet bowl 4a is, for example, a water-saving toilet bowl defined in JIS A 5207:2011, a water-saving type I toilet bowl with a flushing water volume of 8.5 L or less, or a water-saving toilet bowl with a flushing water volume of 6.5 L or less. Type II toilets and the like are included. As the water-saving type II toilet bowl, a toilet bowl with a flush water volume of 4.8 L or less is preferable, and a toilet bowl with a flush water volume of 3.8 L or less is more preferable.

The piping structure 1 includes a plurality of drainage branch pipes 7 connected to each of the plurality of drainage facilities 4, and a drainage header 10 connected to each of the plurality of drainage facilities 4 via the plurality of drainage branch pipes 7. there is The drainage branch pipe 7 can be formed by, for example, an elbow or the like connecting a plurality of pipes and adjacent pipes.
As shown in FIGS. 2 to 5, the drainage header 10 includes a header body 20, a plug body 40, and a conversion joint 60. As shown in FIG.

Header main body 20 is formed in a tubular shape. The header body 20 extends horizontally. The drainage header 10 is installed in the building 3 with a drainage slope. With the drainage header 10 installed in the building 3, the pipe axis of the header body 20 is inclined with respect to the horizontal plane. The drainage gradient is a gradient that descends from the upstream side U toward the downstream side D along the pipe axis direction L of the header body 20 . Among both ends of the header body 20 in the pipe axis direction L, the end located on the upper side when the header body 20 is installed in the building 3 is the end on the upstream side U, and the end located on the lower side is the downstream end. It is the end of side D. A stopper 40 is attached to the upstream U end, and a conversion joint 60 is attached to the downstream D end.
In the following description, the direction orthogonal to both the tube axis direction L and the vertical direction V is referred to as the width direction W of the main body.

As shown in FIGS. 3 and 4, the cross-sectional shape of the header body 20 (the cross-sectional shape of the header body 20 in a cross-sectional view orthogonal to the pipe axis) is an egg shape (inverted egg shape) elongated in the vertical direction V. be. The size (width) of the header body 20 in the body width direction W gradually decreases downward. Since the cross-sectional shape of the header body 20 is oval, for example, when the same amount of sewage is drained, the water level can be made higher than when the cross-sectional shape of the header body 20 is circular. can be done. As a result, contaminants are less likely to accumulate on the tube bottom 20a of the header body 20. As shown in FIG.

As shown in FIG. 2 , the header body 20 is provided with leg portions 21 , branch pipe connection portions 22 , and cleaning openings 23 .
The legs 21 support the header body 20 . The leg portion 21 is provided on the bottom surface of the header body 20 . A plurality of legs 21 are arranged at intervals in the tube axis direction L. As shown in FIG. When the drainage header 10 is installed in the building 3, the legs 21 are fixed to the building 3.

The branch pipe connection portion 22 is provided on the side surface of the header body 20 . A plurality of branch pipe connection portions 22 are arranged at intervals in the pipe axis direction L. As shown in FIG. The branch pipe connection portion 22 protrudes in the body width direction W from the side surface of the header body 20 . In the illustrated example, the branch pipe connection portion 22 extends parallel to the width direction W of the main body. The branch pipe connecting portion 22 serves as a socket into which the end of the drainage branch pipe 7 is inserted. The inside of the branch pipe connecting portion 22 is an opening 24 connected to the drain branch pipe 7 . A plurality of openings 24 are formed on the side surface of the header body 20 . The opening 24 is formed in a circular shape (a perfect circular shape in the illustrated example) when viewed from the front.

In this embodiment, the branch pipe connection portions 22 are provided on only one side of the header body 20 in the body width direction W at each position along the pipe axis direction L, but are provided on both sides in the body width direction W. may be provided. In other words, a pair of branch pipe connection portions 22 may be arranged with the header main body 20 interposed therebetween in the main body width direction W. In this case, of the plurality of branch pipe connection portions 22 (openings 24), a configuration is adopted in which the branch pipe connection portions 22 (openings 24) to which the drainage branch pipe 7 is not connected are closed with a lid (not shown). be able to.

The cleaning port 23 is provided on the upper surface of the header body 20. - 特許庁The cleaning port 23 is arranged along the pipe axis direction L at the same position as each of the branch pipe connecting portions 22 . A cap 25 for closing the cleaning port 23 is detachably attached to the cleaning port 23 .

In this embodiment, the header body 20 is divided into a plurality of divided bodies 26 along the pipe axis direction L. As shown in FIG. Each divided body 26 is formed to have the same shape and size as each other. As shown in FIG. 3, each segment 26 has one leg 21, one branch pipe connection 22, and one cleaning port 23. As shown in FIG. In each split body 26, the branch pipe connecting portion 22 and the cleaning port 23 are arranged at the central portion in the pipe axial direction L, and the leg portion 21 is arranged at the end portion on the upstream side U in the pipe axial direction L.
As shown in FIG. 5, in each divided body 26, the upstream U end (hereinafter referred to as "receiving opening 27") is closer to the downstream D end (hereinafter referred to as "insertion opening 28"). It has a large diameter, and the opening area of the socket 27 is larger than the opening area of the insertion opening 28 .

As shown in FIG. 2, the header main body 20 is formed by connecting a plurality of divided bodies 26 in the pipe axis direction L. As shown in FIG. Divided bodies 26 adjacent to each other in the pipe axis direction L are connected in a state in which the insertion opening 28 of the divided body 26 located on the upstream side U is inserted into the socket 27 of the divided body 26 located on the downstream side D. (see Figure 5). Locking portions 27a and 28a facing in the pipe axis direction L are provided in the receiving port 27 and the insertion port 28, respectively. The locking portion 27a of the socket 27 faces the upstream side U. As shown in FIG. A locking portion 28a of the insertion port 28 faces the downstream side D. As shown in FIG. The insertion opening 28 is inserted into the receiving opening 27, and the engaging portions 27a, 28a abut against each other in the pipe axial direction L, thereby restricting further insertion of the insertion opening 28. As shown in FIG. The engaging portions 27a and 28a can be formed by, for example, opening edges facing the tube axis direction L in the socket 27 and the insertion opening 28, respectively.

Of the plurality of divided bodies 26, the divided body 26 positioned furthest upstream U (hereinafter referred to as "first divided body 26a") forms an upstream U end of the header main body 20 in the pipe axial direction L. do. A first opening 24a located on the most upstream side U among the plurality of openings 24 is formed in the first divided body 26a.

In a vertical cross-sectional view along the vertical direction V including the pipe axis of the drainage header 10, the first opening 24a has a circular shape (perfect circular shape in the illustrated example). In the vertical cross-sectional view, the first opening 24a (opening axis O of the first opening 24a) is shifted upward with respect to the center of the header body 20 in the vertical direction V. As shown in FIG. The first opening 24 a is open to the inner peripheral surface of the header body 20 , and the opening edge of the first opening 24 a is formed by the inner peripheral surface of the header body 20 . As shown in FIG. 4, of the plurality of drainage branch pipes 7, the first drainage branch pipe 7a connected to the water-saving toilet bowl 4a is connected to the first opening 24a.

As shown in FIG. 5 , the plug 40 closes the upstream U end of the header body 20 . The plug 40 is fitted into the upstream U end of the header body 20 . The plug 40 is located on the upstream side U with respect to the first opening 24a. In other words, the plug 40 does not cover the first opening 24a from the inside of the header body 20 . In the illustrated example, the plug 40 is fitted in the receptacle 27 of the first split body 26a.

A restricting portion 41 is formed in the stopper 40 . The restricting portion 41 is formed on the outer peripheral surface 40 a of the plug 40 . The regulation part 41 faces the downstream side D. As shown in FIG. When the stopper 40 is inserted into the socket 27 and the restricting portion 41 of the stopper 40 abuts against the engaging portion 27a of the socket 27 in the tube axis direction L, further insertion of the stopper 40 is restricted. be. In other words, the restricting portion 41 and the locking portion 27a form a positioning portion 42 that positions the plug body 40 with respect to the header main body 20 in the pipe axial direction L. As shown in FIG. The positioning portion 42 accurately determines the relative position of the plug 40 with respect to the first opening 24a.

The plug body 40 may be attached to the header main body 20 in a substantially non-detachable manner, or may be attached detachably. When it is attached to the header body 20 substantially non-detachably, the outer peripheral surface 40a of the plug 40 and the inner peripheral surface of the header body 20 may be bonded, for example. When the plug 40 is detachably attached to the header main body 20, a ring-shaped rubber ring (elastic ring) (not shown) is arranged between the outer peripheral surface 40a of the plug 40 and the inner peripheral surface of the header main body 20. may have been In this case, by elastically deforming the rubber ring between the plug 40 and the header main body 20, the plug 40 is separated from the header main body 20 while ensuring the sealing performance between the plug 40 and the header main body 20. Unintentional separation can be suppressed.

As shown in FIGS. 5 to 7, the plug 40 includes a tubular portion 43 and a plate portion 44. As shown in FIGS. The cylindrical portion 43 is fitted inside the header body 20 . The tubular portion 43 is formed in a multistage tubular shape. In this embodiment, the stepped portion of the tubular portion 43 forms the restricting portion 41 . The plate portion 44 closes the downstream end D of the cylindrical portion 43 .

At least the plate portion 44 of the plug 40 is transparent. As a result, the inside of the header body 20 can be visually recognized through the plate portion 44, and for example, the inside of the drainage header 10 can be easily inspected. Further, by ensuring the thickness of the plate portion 44 (for example, by making the plate portion 44 thicker than the receiving opening 27 and the insertion opening 28), the sound insulation performance can be enhanced.

The plate portion 44 forms a first end surface 45 facing the downstream side D of the plug 40 . The first end surface 45 has a hanging portion 46 and an overhang portion 47 .
The drooping portion 46 extends downward from the inner peripheral surface of the header body 20 and continues to the upper end of the overhanging portion 47 in the vertical cross-sectional view. The drooping portion 46 extends linearly in the vertical cross-sectional view. In the vertical cross-sectional view, the upper end of the drooping portion 46 is positioned on the inner peripheral surface of the header body 20 , and the drooping portion 46 is perpendicular to the inner peripheral surface of the header body 20 . In the vertical cross-sectional view, the lower end of the drooping portion 46 is in contact with the edge of the first opening 24a, and the drooping portion 46 extends tangentially from the edge of the first opening 24a.

The protruding portion 47 protrudes toward the downstream side D below the first opening 24a. In the vertical cross-sectional view, the projecting portion 47 is located upstream U of the opening axis O of the first opening 24a. The amount of protrusion of the protrusion 47 differs for each position in the vertical direction V. As shown in FIG. This overhang amount gradually increases toward the bottom. The lower end of the projecting portion 47 is arranged along the pipe axis direction L at a position equivalent to the opening axis O of the first opening portion 24a. This lower end is positioned on the inner peripheral surface of the header body 20 .

The projecting portion 47 includes a first guide portion 48 , a second guide portion 49 and an inflection portion 50 . The first guide portion 48 extends along the opening edge of the first opening portion 24a in the longitudinal cross-sectional view. In the illustrated example, in the vertical cross-sectional view, the first guide portion 48 extends over its entire length parallel to the opening edge of the first opening portion 24a, and furthermore, the first guide portion 48 extends over its entire length along the first opening. It overlaps the opening edge of the portion 24a. The second guide portion 49 extends downward and downstream D from the first guide portion 48 and is spaced downward from the opening edge of the first opening portion 24a in the vertical cross-sectional view.

In the vertical cross-sectional view, the first guide portion 48 has a curved shape that protrudes toward the upstream side U, and the second guide portion 49 has a curved shape that protrudes toward the downstream side D. 48 and the second guide portion 49 are connected via the inflection portion 50 . In the illustrated example, in the vertical cross-sectional view, the projecting portion 47 is configured only by the first guide portion 48, the second guide portion 49, and the inflection portion 50, and the first guide portion 48 extends from the second guide portion 49. is also short in the vertical direction V. In other words, in the vertical cross-sectional view, it can be said that the inflection portion 50 is eccentric upward along the vertical direction V within the overhanging portion 47, and the inflection portion 50 is located above the center of the overhanging portion 47 in the vertical direction V. is also located above. The radius of curvature of the second guide portion 49 is larger than the radius of curvature of the first guide portion 48 in the vertical cross-sectional view. As a result, the slope of the second guide portion 49 can be made steeper.

As shown in FIGS. 6 and 7, the depending portion 46 is parallel to an orthogonal plane orthogonal to the tube axis. Although the amount of protrusion of the protrusion 47 is different for each position in the vertical direction V, the portion of the protrusion 47 having the same position in the vertical direction V is constant regardless of the position in the width direction W of the main body. It's becoming In other words, the projecting portion 47 is parallel to the width direction W of the main body when viewed in cross section along both the tube axis direction L and the width direction W of the main body.

The plug 40 is formed by injection molding synthetic resin such as polyvinyl chloride resin. When the plug 40 is injection-molded, the surface of the plug 40 is formed with, for example, gate marks and parting lines (none of which are shown) of the injection molding mold for forming the plug 40 . Gate traces are caused by gates that introduce synthetic resin into the space of the mold. The parting line originates from the parting surface of the mold.

These gate traces, parting lines, etc. (hereinafter referred to as “gate traces”) are the portions of the surface of the plug 40 excluding the first end surface 45 and the outer peripheral surface 40a (hereinafter referred to as “exposed portions”). ). Examples of the exposed portion include an inner peripheral surface 40b of the plug 40, a second end surface 40c of the plug 40 facing the upstream side U, and a closing surface 40d that closes the opening of the plug 40 on the downstream side D. In the illustrated example, the inner peripheral surface 40b is formed by the inner peripheral surface of the tubular portion 43, the second end surface 40c is formed by the upstream U end surface of the tubular portion 43, and the closing surface 40d is formed by the plate portion 44. It is formed by a surface facing the upstream side U.

Note that if a gate mark or the like is formed on the first end surface 45 of the plug 40, foreign matter such as paper or hair contained in the wastewater (sewage) may get caught in the gate mark or the like, hindering the transport of waste. . Further, if gate traces or the like are formed on the outer peripheral surface 40 a of the plug 40 , a gap may be formed between the plug 40 and the socket 27 . On the other hand, if gate traces or the like are formed in the exposed portion, this kind of problem can be suppressed.

As shown in FIG. 2, the conversion joint 60 is attached to the downstream end D of the header body 20 . The conversion joint 60 connects the header body 20 and a pipe (not shown) connected to the drain trough 5 . In the illustrated example, the conversion joint 60 connects the egg-shaped header body 20 and the perfectly circular pipe.

As described above, according to the drainage header 10 according to the present embodiment, the first end surface 45 of the plug 40 is provided with the projecting portion 47 as shown in FIG. Therefore, even if filth runs up from the downstream side D to the upstream side U in the header main body 20, the filth will move to the upstream side U of the tube bottom 20a of the header main body 20 from the first opening 24a. The overhang 47 can prevent deposition on the located portion. Here, when the filth is deposited on the downstream side D of the first opening 24a, the filth can be washed away to the downstream side D by the drainage flowing from the first opening 24a. If it is deposited on the upstream side U of the opening 24a, it is difficult to wash it away. Therefore, as described above, the projecting portion 47 prevents dirt from accumulating on the upstream side U of the first opening 24a, so that the dirt that runs up the inside of the header body 20 accumulates on the pipe bottom 20a of the header body 20. can be suppressed.
Also, the projecting portion 47 is provided with a first guide portion 48 . Therefore, the wastes flowing into the header body 20 from the first opening 24a can be guided toward the downstream side D by the first guide portion 48. As shown in FIG. As a result, it is possible to prevent dirt that flows into the header body 20 from the first openings 24 a from accumulating on the pipe bottom 20 a of the header body 20 .
As described above, according to the drainage header 10, it is possible to prevent the filth that has flowed up in the header body 20 and the filth that has flowed into the header body 20 from the first openings 24a from accumulating on the pipe bottom 20a of the header body 20. can be suppressed. As a result, for example, it is possible to prevent dirt from accumulating on the tube bottom 20a and clogging the first opening 24a, thereby improving clogging with dirt.

In addition to the first guide portion 48 , the projecting portion 47 further includes a second guide portion 49 . Therefore, the wastes that flow into the header body 20 through the first openings 24a and flow down toward the pipe bottom 20a of the header body 20 from the first openings 24a are guided toward the downstream side D by the second guides 49. can do. As a result, clogging with dirt can be further improved.

Further, in the vertical cross-sectional view, the first guide portion 48 has a curved shape protruding toward the upstream side U. As shown in FIG. Therefore, for example, compared to the case where the first guide portion 48 does not protrude toward the upstream side U, the volume of the drainage header 10 can be easily increased.
Further, in the vertical cross-sectional view, the second guide portion 49 has a curved shape protruding toward the downstream side D. As shown in FIG. As a result, compared to the case where the second guide portion 49 does not protrude toward the downstream side D, for example, the inclination of the second guide portion 49 in the vertical cross-sectional view can be made steeper.
Further, the first guide portion 48 and the second guide portion 49 are connected via the inflection portion 50 . Therefore, it is possible to form the overhanging portion 47 smoothly, and for example, it is possible to prevent dirt from being caught on the overhanging portion 47 .
As described above, clogging with dirt can be further improved.

Further, in the vertical cross-sectional view, the projecting portion 47 is located upstream U of the opening axis O of the first opening portion 24a. Therefore, even though the plug body 40 is provided with the projecting portion 47, it is possible to prevent the projecting portion 47 from excessively projecting into the header main body 20 and reducing the volume of the drainage header 10 too much. As a result, for example, even when a large amount of water is discharged from the water discharge header 10, the inside of the water discharge header 10 is made difficult to be filled with water, and the backflow of the water can be suppressed.

A first end face 45 of the plug 40 also has a hanging portion 46 . Therefore, the position of the projecting portion 47 can be lowered by the amount of the hanging portion 46 . As a result, for example, it is possible to lower the position of the first drainage branch pipe 7a downward, and while securing the drainage gradient of the first drainage branch pipe 7a, the underfloor accommodation of the first drainage branch pipe 7a is also secured. etc.

According to the piping structure 1 according to the present embodiment, since the plug 40 includes the drain header 10 having the projecting portion 47, clogging with waste can be improved.
A water-saving toilet bowl 4a is connected to the first drainage branch pipe 7a. Therefore, it is possible to remarkably achieve the function and effect of being able to suppress clogging with dirt as described above.

(Second embodiment)
Next, a piping structure 70 according to a second embodiment of the invention will be described with reference to FIGS. 8 to 10. FIG.
In the second embodiment, the same reference numerals are assigned to the same components as in the first embodiment, the description thereof is omitted, and only the different points will be described.

In the piping structure 70 according to the present embodiment, at least the first drainage branch pipe 7a among the plurality of drainage branch pipes 7 has an egg shape elongated in the vertical direction V (inverted egg shape) in cross-sectional view. In the illustrated example, only the cross-sectional shape of the first drainage branch pipe 7a among the plurality of drainage branch pipes 7 is connected to the header body 20 from the first end connected to the water-saving toilet bowl 4a. It has an oval shape over the entire length up to the second end, and the cross-sectional shape of the other drainage branch pipe 7 is a perfect circle. For example, when the first drainage branch pipe 7a is formed by a plurality of pipes and elbows, the oval cross-sectional shape of the first drainage branch pipe 7a over the entire length means that all the pipes and elbows cross. It means that the surface view shape is an oval shape.

Further, the cross-sectional shape of the first opening 24a to which the first drainage branch pipe 7a is connected is also the above-described egg shape. As a result, the bottom of the second end of the first drainage branch pipe 7a and the bottom of the first opening 24a are lower than the bottom of the other drainage branch pipe 7 and the bottom of the other opening 24. positioned. As shown in FIG. 9, at the bottom of the second end of the first drainage branch pipe 7a (bottom of the first opening 24a), the , the step S of the header body 20 with respect to the tube bottom 20a is small. By reducing the step S, dirt is less likely to accumulate on the tube bottom 20a of the header body 20. As shown in FIG.

By the way, as described above, the water-saving toilet 4a has a small drainage amount, and the bottom 20a near the opening 24 connected to the water-saving toilet 4a through the drainage branch pipe 7 is likely to be clogged with waste. Therefore, the first drain branch pipe 7a connected to the water-saving toilet bowl 4a and the first opening 24a have the above-described egg shape and the step S is small, so that the effect of suppressing the accumulation of filth can be remarkably achieved. . From this point of view, for example, among the plurality of openings 24 in the drainage header 10, the opening 24 connected to the water-saving toilet 4a is preferably oval. In other words, when the water-saving toilet bowl 4a is connected to an opening 24 other than the first opening 24a (the opening 24 located on the most upstream side U), the cross section of the opening 24 and the corresponding drain branch pipe 7 The visual shape is preferably oval.

The technical scope of the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention.

In the above-described embodiment, the branch pipe connecting portion 22 protrudes from the side surface of the header body 20 in parallel with the body width direction W, but the present invention is not limited to this. For example, the branch pipe connection portion 22 may extend from the side surface of the header body 20 in a direction inclined with respect to the width direction W of the body. In this case, the shape of the opening 24 in the vertical cross-sectional view may be an elliptical shape (circular shape) elongated in the pipe axis direction L.

The projecting portion 47 does not have to include the second guide portion 49 . The first end surface 45 may not have the hanging portion 46 .
In the vertical cross-sectional view, the projecting portion 47 may be located downstream D of the opening axis O of the first opening 24a.

The water-saving toilet bowl 4a is connected to the first opening 24a via the first drainage branch pipe 7a, but the present invention is not limited to this. Other drainage facilities 4 such as the bathtub 4b, the washing machine 4c, the washroom 4d, and the sink 4e may be connected to the first opening 24a.

In addition, it is possible to appropriately replace the constituent elements in the above-described embodiment with well-known constituent elements without departing from the gist of the present invention, and the modifications described above may be combined as appropriate.

1, 70 Piping structure 4 Drainage facility 4a Water-saving toilet 7 Drainage branch pipe 7a First drainage branch pipe 10 Drainage header 20 Header main body 24 Opening 24a First opening 40 Plug body 45 First end face (end face)
46 Drooping portion 47 Overhanging portion 48 First guide portion 49 Second guide portion 50 Inflection portion D Downstream side L Pipe axial direction O Opening axis U Upstream side V Vertical direction

Claims (7)

A drainage header connected to each of a plurality of drainage facilities via a plurality of drainage branch pipes,
a header body having a side surface formed with a plurality of openings connected to the plurality of drainage branch pipes;
a plug that closes an upstream end in the pipe axis direction of both ends of the header body along the pipe axis direction in the header body,
The end surface of the plug body facing the downstream side in the pipe axis direction has an overhanging portion that projects toward the downstream side below a first opening located on the most upstream side among the plurality of openings. ,
The projecting portion includes a first guide portion extending along the opening edge of the first opening in a longitudinal cross-sectional view along the vertical direction including the pipe axis of the drainage header ,
In the vertical cross-sectional view, the downstream end of the projecting portion is located upstream of the opening axis of the first opening.
drainage header. A drainage header connected to each of a plurality of drainage facilities via a plurality of drainage branch pipes,
a header body having a side surface formed with a plurality of openings connected to the plurality of drain branch pipes;
a plug that closes an upstream end in the pipe axis direction of both ends of the header body along the pipe axis direction in the header body,
The end surface of the plug body facing the downstream side in the pipe axis direction includes an overhanging portion that projects toward the downstream side below a first opening positioned most upstream of the plurality of openings. ,
The projecting portion includes a first guide portion extending along the opening edge of the first opening in a longitudinal cross-sectional view along the vertical direction including the pipe axis of the drainage header, and a first guide portion extending along the opening edge of the first opening in the longitudinal cross-sectional view. a second guide portion extending downward and downstream from and spaced downward from the opening edge of the first opening ;
The second guide portion is positioned between the upstream end of the opening edge of the first opening and the opening axis of the first opening in the longitudinal cross-sectional view.
drainage header. In the vertical cross-sectional view, the first opening has a circular shape, the first guide portion has a curved shape that protrudes toward the upstream side, and the second guide portion protrudes toward the downstream side. 3. The drainage header according to claim 2, wherein the first guide portion and the second guide portion are connected via an inflection portion. In the longitudinal cross-sectional view, the opening axis of the first opening is shifted upward with respect to the vertical center of the header body, and the vertical upper end of the opening edge of the first opening is 4. The drainage header according to any one of claims 1 to 3, which is positioned lower than the upper end of the header body in the vertical direction . 5. The end face according to any one of claims 1 to 4, wherein the end face further includes a hanging part extending downward from the inner peripheral surface of the header body and continuing to the upper end of the projecting part in the vertical cross-sectional view. drainage header. a plurality of drainage branch pipes connected to each of the plurality of drainage facilities;
A piping structure comprising: a drainage header according to any one of claims 1 to 5, which is connected to each of said plurality of drainage facilities via said plurality of drainage branch pipes. The plurality of drainage branches comprise a first drainage branch pipe connected to the first opening,
7. The piping structure according to claim 6, wherein a water-saving toilet as said drainage equipment is connected to said first drainage branch pipe.

Images