JP2003261980A - Structure of connection between drain pipe and drainage basin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To smoothly and surely discharge water without enlarging a diameter of a drain pipe which is connected with a drainage source such as a lavatory, a wash room, a kitchen and a bathroom, in a building such as an apartment house and a dwelling in which many households live together. <P>SOLUTION: When a drainage basin A, which is provided in an outer peripheral pipe 3 having a low running-water level, is connected with the drain pipe 1 from the building, a flow of drainage and an air flow is secured. The drainage basin A has a basin body 4, a tee member 6 which is connected to an upper part of the basin body 4 and provided with a connecting part 6a for connecting the drain pipe 1, and a cylindrical member 5 which is arranged between the basin body 4 and the tee member 6; and the drain pipe 1 is connected to the tee member 6. Thus, the flow of the drainage and the air flow in the drain pipe 1 is secured. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when connecting a drainage pipe from a building to a drainage basin provided outside the building, ensures reliable communication even if a large amount of drainage flows through the drainage pipe. The present invention relates to a connection structure configured to secure a continuous air layer and realize a stable drainage flow.

[0002]

2. Description of the Related Art In a building including 2-floor to 5-floor medium- and low-rise houses, a toilet and a washroom are installed on each floor, and drainage is appropriately performed from each. For this reason, a horizontal drain pipe is installed at each floor that requires drainage, and toilets, washrooms, which are drainage equipment,
It is connected to the kitchen, bathroom, etc. through the equipment drainage pipe. In addition, a drainage main pipe is installed between the upper floor and the first floor, and a drainage horizontal branch pipe connected to each floor is connected to this drainage main pipe to form a drainage horizontal main pipe on the first floor, which is led to the outside of the building. This constitutes the drainage pipe in the building.

A site drainage pipe is provided outside the building, and a drainage basin is installed at a predetermined position of the site drainage pipe. An end portion of the drainage horizontal main pipe of the drainage pipeline provided in the building is connected to the drainage basin. Therefore,
The drainage flowing through the drainage pipe flows into the site drainage pipe through the drainage basin, and then flows from the site drainage pipe through the public basin to the sewer pipe laid outside the site.

FIG. 7 shows a general connecting structure of a drainage pipe and a drainage basin. That is, the drain pipe 51 from the indoor side is
A building drainage pipe 53 is laid at a position separated from the foundation 52 by a predetermined distance, and a drainage basin 54 is provided in the site drainage pipe 53. There is. The axial center of the drainage pipe 51 and the center of the drainage basin 53 are arranged substantially in the horizontal plane, and the drainage pipe 51 is arranged at the upper level and the site drainage pipe 53 is arranged at the lower level on the vertical plane. An elbow 55 is attached downward to the end of the drainage pipe 51, and a straight pipe 56 and a horizontal elbow 57 are attached to the elbow 55. Especially, the outlet level of the elbow 57 is
It is almost the same level as the mounting port 54a of 54, and both are straight pipes.
Connected by 58.

In the drainage pipe, a toilet, a washroom, a kitchen,
Traps are provided in drainage sources such as bathrooms, and so-called sealed water in which water having a predetermined height is stored is formed for each trap, and due to this sealing water, leakage of odors in the drainage pipe,
Prevents insects from entering.

Further, when a large amount of drainage flows into the drainage conduit consisting of the horizontal drainage pipe and the drainage main pipe, the freefalling drainage diffuses in the drainage main pipe and its surface area increases. Therefore, the air in the pipe is also moved more strongly downward, and as a result,
The pressure of the air layer in the drainage pipe is negative pressure on the upper side of the drainage main pipe and positive pressure on the lower side. Since the negative pressure or the positive pressure acts on the sealing water provided in the trap, there is a case where the function as the sealing water cannot be exerted by causing the seal to break.
A ventilation function is provided on the top of the drainage main pipe, and a ventilation valve is provided for each branch pipe connected to a toilet or the like.

In particular, as shown in FIG. 8 which will be described later, when the drainage falls from the drainage horizontal main pipe through the elbow and then merges with the drainage pipe provided in the site drainage pipe, the flow direction in the elbow is changed. In the closed portion, the drainage of the portion may block the air passage, and in this case, the internal pressure on the upstream side of the closed portion may increase.

When the building is a medium or low-rise condominium of about 3 floors or 4 floors, a drainage horizontal branch pipe is connected to each house, and the drainage horizontal branch pipe is connected to the drainage vertical main pipe, and the drainage is moved up and down. Are collected and led to the first floor. Multiple drainage mains may be installed depending on the size of the housing complex. This drainage vertical main pipe becomes a drainage horizontal main pipe, and it is common to penetrate the foundation and pipe it to the outside of the building, and lower it to connect it to the drainage basin. In this case, the drainage pipe joins a plurality of households, but a pipe having a diameter of about 100 mm to 125 mm is used in consideration of the simultaneous usage rate.

Further, in a low-rise apartment building, a drainage main pipe may be piped for each house for drainage, but in this case, it is difficult to expand the plane space required for the pipework and the construction work, and the cost cannot be reduced. However, if the drainage main pipes for each house are respectively piped under the floor and then the foundation is penetrated, many sleeve holes will be formed in the foundation, which causes a problem in assuring the strength of the foundation. Further, in order to avoid this problem, when the drainage pipe on the upper floor is installed along the outside of the outer wall, an aesthetic problem occurs.

However, these problems are caused by collecting the drainage water from a plurality of places in the drainage main pipe, passing the collected drainage pipes under the floor of the building, and then passing through the foundation to form the drainage pipes provided on the site drainage pipe. It can be solved by connecting to a masu.

In particular, the indoor piping technology consisting of a vertical drain main pipe and a horizontal drain branch pipe inside the building and the outdoor piping technology consisting of a site drain pipe and a drainage basin in the outer periphery of the building are individually It has been established as a piping technology that has accumulated many technologies.

[0012]

Drainage from a plurality of points is collected through a drainage main pipe, and a horizontal drainage pipe provided under the floor on the first floor is passed through the foundation to the outside and then lowered to be drained. In the structure of the conventional drainage pipe connected to the basin, when a large amount of drainage flows at one time, the internal pressure of the drainage side branch pipe under the first floor may rise, causing so-called breaking of the seal water. Problem has occurred.

When the above problems occur, it is common to solve these problems by increasing the diameter of the drainage vertical main pipe or the drainage lateral branch pipe of the piping system. However, as the pipe diameter increases, there is a need to change the height of the bottom floor on the lowermost floor, which is downstream of the flow, and there is a problem of strength reduction due to increasing the diameter of the sleeve hole formed in the foundation. Occurs. Therefore, it is desired to develop a technology capable of preventing the sealed portion from being broken without increasing the pipe diameter in a house such as a house where multiple households live together or an apartment house.

[0014]

DISCLOSURE OF THE INVENTION The inventor of the present invention has the purpose of constructing a drainage pipeline that does not break even if a large amount of wastewater is poured into the drainage pipe at one time. We have investigated the causes that occur and considered how to eliminate them. As a result, although indoor piping technology and outdoor piping technology have already been established, the structure of the part that connects the drainage pipe from the building and the drainage basin has not been analyzed, and several pipes are required to achieve smooth drainage. It turns out that there is a problem.

That is, the inventor of the present invention constructs an experimental facility having a conventional typical connection structure having a structure for connecting a drainage pipe and a drainage basin shown in FIG. 7, and connecting the both. By observing the behavior of drainage to understand the problem and clarifying this problem, it is possible to prevent the breakage of the equipment connected to the drain side branch pipe on the first floor and to drain the water smoothly and reliably. Realized a possible structure.

In the conventional connection structure shown in the figure, when a large amount of drainage is made to flow inside the drainage pipe at once, as shown in FIG. In the portion, an air passage 62 through which air flows is formed in the upper part of the drainage or a part of the cross section. However, the drainage flowing through the drainage pipe 51
When the 60 flows into the straight pipe 56 via the elbow 55, the drainage 60 collides with the inner peripheral surface of the elbow 55 on the large diameter side, and then falls vertically in the straight pipe 56. It was found that the drainage 60 blocks the air passage at the section FF, and the air passage 62 is blocked at the section. Note that FIG. 8 conceptually shows the drainage 60 flowing through the drainage pipe 51, and does not represent all the examples. However, the basic trends are the same.

As a result, the air flowing down the drainage main pipe as the drainage flows down in the drainage pipe 51 is drained at the cross section FF.
Since it is blocked by 60 and cannot flow to the downstream side, the internal pressure of the drain pipe 51 on the upstream side of the closed portion formed in the cross section FF of the elbow 55 rises, and this drain pipe 51
It was found to affect the blowing of trap water in the toilets, washrooms, kitchens, bathrooms, etc. on the 1st floor, which was connected to the immediate vicinity of.

When the amount of the drainage 60 is small, the cross section E-E of the elbow 55 is not blocked by the drainage 60 and the air passages 62 are formed on both sides of the drainage 60 in the cross section E-E.
It is formed continuously from 55 onward, and it is possible to realize a smooth flow of the drainage 60 and the air sucked from the ventilation part in association with the generation of drainage.
No breakage in the toilet, washroom, kitchen, bathroom, etc. on the first floor.

As a result of the above experiment, when the drainage flowing from the building into the drainage pipe is joined to the drainage basin, the flow of the drainage is ensured and the flow of the sucked air is ensured to increase the internal pressure of the equipment drainage pipe on the first floor. Therefore, it has been found that, without doing so, it is possible to prevent breakage in the toilet, washroom, kitchen, bathroom, etc. on the first floor, and realize smooth and reliable drainage.

Based on the above knowledge, the connection structure between the drainage pipe and the drainage basin was variously changed, and further experiments were conducted.
A connection structure that prevents the sealed water from being broken and allows reliable and smooth drainage without increasing the diameter of 51 has been obtained. That is, this connection structure does not increase the diameter of the drain pipe even if a large amount of drainage occurs at one time, by always ensuring the air flow passage when drainage flows in the piping path. It is possible to smoothly drain water by preventing breakage in equipment that generates drainage.

Therefore, according to the present invention for solving the above-mentioned problems, a drainage pipe from a building and a drainage pipe provided on a site on the outer periphery of the building and having a running water level lower than the drainage pipe are provided. A connection structure with a drainage basin having a diameter larger than the diameter, wherein the drainage basin has a main body portion provided with a water channel connected to a site drainage pipe at the bottom, and drainage to the side above the main body portion. A drainage pipe is connected to a connection portion of the drainage basin, which has a connection portion for connecting a pipe and a tubular portion.

Connection structure between the drain pipe and the drain basin (hereinafter,
Simply called "connection structure"), the drainage basin and the main body,
The drainage pipe from the building was connected to the connection part, and the level of the connection part to the drainage basin of the drainage pipe changed to the installation level of the site drainage pipe connected to the main body part. Easy to deal with.

Therefore, when connecting the drainage pipe to the connecting portion, it is not necessary to interpose an elbow between the drainage pipe and the drainage pipe. Therefore, the drainage pipe can be held at substantially the same level and connected to the drainage basin. The drainage flowing inside the pipe does not block the drainage pipe, and can maintain an air passage between the upper surface of the drainage and the inner peripheral surface of the upper portion of the drainage pipe. In other words, the internal pressure of the drainage pipe is maintained evenly, which prevents breakage and realizes good drainage.

In the above connecting structure, it is preferable that the tubular portion forming the drainage basin has a function of adjusting the length so that the level of the connecting portion becomes equal to the installation level of the drainage pipe. In this case, it is preferable that the drainage basin be composed of three members: a connecting portion, a tubular portion, and a main body portion. Alternatively, the tubular portion may be integrated with the connecting portion or the main body portion to form two members. By having such a tubular portion, the connecting portion can face the drainage pipe from the building, so that the drainage pipe can be connected to the drainage basin without bending the drainage pipe. .

Another connection structure is a connection structure between a drainage pipe from a building and a drainage pipe provided on a site drainage pipe which is piped on the outer periphery of the building and has a flowing water level lower than the drainage pipe. An end that is connected to the main body part from the installation high level of the drain pipe, the bottom part of the drain pipe being connected to the site drain pipe and having a water channel connected to the end part of the drain pipe At least a part of the pipe that descends to the lower level of the section is an inclined pipe.

In the above connection structure, when all the pipes that descend from the installation drainage pipe high level to the basin main body are inclined pipes, when the drainage flowing through the drainage pipes flows into the inclination pipes Further, in the elbow portion, the drainage flows along the pipe wall on the large diameter side (outer side) of the elbow to change the downflow direction. Therefore, a gap is formed along the pipe wall on the upper side from the small diameter side (inside) of the elbow, and the gap functions as an air passage.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the connection structure according to the present invention will be described below. INDUSTRIAL APPLICABILITY The connection structure of the present invention merges upper and lower drainage generated from a large number of toilets, washrooms, kitchens, bathrooms (hereinafter referred to as drainage sources), and drains the water, as in a multi-storied house or a low-rise apartment complex. In the case of draining into a basin, the drainage pipe is not enlarged in diameter, and the sealed water at each drainage source is prevented from breaking and a smooth and reliable drainage is realized.

That is, when the drainage is generated from the upper floor, the internal pressure of the drainage pipe arranged on the first floor is increased by ensuring the flow passage of the air sucked by the drainage pipe up to the drainage basin. It is possible to hold the sealed water provided in the drainage device arranged on the first floor.

Therefore, the connection structure of the present invention allows the drainage pipe to be connected to the inside of the drainage pipe without causing the blockage due to the drainage when connecting the drainage pipe and the drainage pipe from the building with different installation levels. This is done by focusing on whether to form a continuous air passage.

The drainage pipe connected to the drainage basin from the building
Horizontal drain pipes for each floor of the building and vertical drain pipes that vertically pass through each floor are connected, and multiple horizontal drain pipes including kitchens and bathrooms are connected to each horizontal drain pipe. To be done. Therefore, although a plurality of drainage sources are connected to the drainage pipe, the number of these drainage sources is not limited in the present invention.

The drainage pipe from the building penetrates the rising part of the foundation and is piped from the indoor side to the outdoor side. The installation level of this drainage pipe is set lower than the ground level and higher than the installation level of the site drainage pipe. For this reason, the drainage pipe is buried in the ground at the inside and outside of the foundation, and a drop occurs between the drainage pipe and the installation level of the site drainage pipe, and the connection structure according to the present invention is realized at a portion corresponding to this drop difference.

The site drainage pipe is laid on the outer periphery of the building,
One or more drainage basins are installed at predetermined positions. The end of this site drainage pipe is connected to the public basin, and this connection part is laid down with the predetermined downflow gradient as the most downstream. Further, the drainage basin is provided with a lid at the upper end, and the level of the lid is configured to match the ground level. Therefore, the drainage basin installed in the site drainage pipe is
The size (installation depth) from the position of the lid to the installation level of the site drainage pipe varies depending on the installation position.

Next, an embodiment of the connection structure of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating a connection structure according to the first embodiment. FIG. 2 is a diagram illustrating a connection structure according to the second embodiment. FIG. 3 is a view for explaining the flow of drainage when the drainage pipe is changed to the inclined pipe in the connection structure of the second embodiment. FIG. 4 is a diagram illustrating a connection structure according to the third embodiment. FIG. 5 is a diagram for explaining the connection structure according to the fourth embodiment. FIG. 6 is a diagram for explaining the flow of drainage in the connection structure of the fourth embodiment.

First, the connection structure according to the first embodiment will be described with reference to FIG. In this embodiment, the drainage pipe 1 penetrating the foundation 2 is drained without changing the flow direction of the drainage pipe so that the drainage may be dropped from a high position of the drainage pipe A having a diameter sufficiently larger than that of the drainage pipe. It is connected to A and is constructed so as not to block the air passage between the drainage pipe and the drainage pipe 1.

In the figure, the drainage pipe 1 penetrates the rising portion 2a of the foundation 2 and is piped from the indoor side to the outdoor side.
On the upstream side of the drain pipe 1, a plurality of drain sources, not shown,
Also, a drainage main pipe that vertically penetrates each floor of a building (not shown) is connected, and is configured so that drainage from a plurality of drainage sources flows in at the same time.

In this embodiment, the diameter of the drain pipe 1 is set to 100 mm, which is the same as the diameter of the drain pipe generally used in the conventional detached house.

A site drainage pipe 3 is laid along the outer periphery of the building (outer periphery of the foundation 2), and a drainage basin A is installed at a predetermined position of the site drainage pipe 3. In the present embodiment, the drainage basin A includes a basin body 4 which is a main body portion arranged at a lower portion, a tubular member 5 which is a tubular portion and is connected to an upper portion of the basin body 4, and an upper portion of the tubular member 5. It is configured to have a tee member 6 which is connected to the and which has a connecting portion 6a, and a lid 7.

The basin body 4 has two connecting portions 4a at the bottom. By connecting the site drainage pipes 3 to the upstream side and downstream side connecting portions 4a respectively, the site drainage pipes 3 are relayed. There is. For this reason, the basin body 4 is installed at a depth corresponding to the laying level of the site drainage pipe 3.

The tee member 6 has a connecting portion 6a in the lateral direction, and the drain pipe 1 is connected to this connecting portion 6a. For this reason, the drainage basin A is installed at a position where the center in the horizontal plane can coincide with the axis of the drainage pipe 1. Further, the connecting portion 6a of the tee member 6 is configured to be adjustable so as to have a level substantially equal to the level of the drainage pipe 1 penetrating the foundation 2.

The tubular member 5 is disposed between the basin body 4 and the tee member 6, the connecting portion 4a of the basin body 4 coincides with the laying level of the site drainage pipe 3, and the connecting portion 6a of the tee member 6 drains. Set the length to match the level of tube 1,
It has a function of relaying the tub body 4 and the tee member 6.
Therefore, when the depth of the basin body 4 changes according to the installation position of the drainage basin A, the depth of the basin body 4 can be adjusted by adjusting the length of the tubular member 5. Further, the gap between the connecting portion 6a and the lid 7 can be adjusted so as to correspond to the change in the soil cover thickness.

In the drainage basin A constructed as described above, the connecting portion 6a of the tee member 6 holds the level that matches the level of the drainage pipe 1 penetrating the foundation 2. Therefore, it becomes possible to connect the drain pipe 1 to the drainage basin A without processing the end portion of the drain pipe 1 or interposing another member. For this reason, there is no structure that hinders the flow of drainage at the connection between the drainage pipe 1 and the drainage basin A, and smooth and reliable drainage can be realized.

That is, when drainage flows into the drainage pipe 1 connected to the tee member 6 of the drainage basin A, this drainage flows down the inside of the drainage pipe 1 and from the connecting portion 6a of the tee member 6 to the basin body 4
To fall. Therefore, the water level on the upper surface of the drainage inside the drainage pipe 1 starts from the portion that penetrates the foundation 2 and ends at the tee member 6.
Is held substantially constant up to, so that the air path between the upper surface of the drainage and the upper inner peripheral surface of the drainage pipe is not blocked.

The void formed inside the drainage pipe 1 functions as an air passage, and when the drainage falls from the drainage main pipe of the drainage pipe 1, the air sucked along with this drainage is drained. It flows along the pipe and is opened to drainage basin A.
Therefore, the internal pressure does not rise in the upstream portion of the drainage pipe 1 on the first floor, and the sealing water provided in the drainage equipment on the first floor does not break.

As shown in the figure, a tubular member is fitted to the upper portion of the tee member 6 instead of the lid 7, and the lid 7 is installed on the upper end of the tubular member to cover the soil. It is possible to adapt to changes in thickness.

Further, it is preferable that an eave-shaped member 6b is provided inside the tee member 6 on the surface facing the joint portion of the drain pipe 1. By providing this eave member 6b,
It is possible to prevent the drainage from the drainage pipe 1 when the drainage pipe 1 collides with the pipe wall of the tee member 6, and particularly to prevent the drainage water from adhering to the back surface of the lid 7.

Next, the connection structure according to the second embodiment will be described with reference to FIGS. In the drawings, the same parts as those in the above-described embodiment and parts having the same functions are designated by the same reference numerals and the description thereof will be omitted.

In the connection structure according to this embodiment, when connecting the drainage basin B and the high-level drainage pipe 1 installed penetrating the foundation 2, the inclined pipe C is interposed in the drainage pipe 1,
Even when the drainage flowing through the drain pipe 1 changes its flow direction,
A continuous air path is formed inside the drain pipe 1 and the inclined pipe C to realize smooth and reliable drainage.

In particular, in this embodiment, the drainage flowing from the drainage pipe 1 is not dropped to the bottom of the drainage basin B, but the drainage of the drainage pipe 1 is compared with the drainage flowing through the site drainage pipe 3 at the bottom. It is configured so as to be merged from a substantially orthogonal direction.

In FIG. 2, the drainage basin B is the site drainage pipe 3
And a basin body 8 having a depth corresponding to the laying level of the basin and having a flow passage 8a for relaying the site drainage pipe 3 and a flow passage 8b for flowing the drainage flowing down through the inclined pipe C at the bottom, Body 8
And a tubular member 9 connected to the upper part of the. In particular, the flow passage 8b is formed so as to join in a direction substantially orthogonal to the flow passage 8a, and therefore the inclined pipe C
Is connected to the basin body 8 at a connecting portion 8c provided in a direction orthogonal to the laying direction of the site drainage pipe 3.

The inclined pipe C includes an elbow 10a attached to the end of the drain pipe 1, a straight pipe 11a attached to the elbow 10a, and an elbow attached to the lower end of the straight pipe 11a.
10b and a straight pipe 11b for connecting the elbow 10b and the connecting portion 8c of the container body 8 to each other.

The drainage basin B is installed such that the center position in the plane is separated from the axial center 1a of the drainage pipe 1 by a preset distance. This distance and the drainage pipe 1 and the connecting portion 8c.
The inclination angle (α shown in FIG. 2B) of the inclined pipe C is set by the dimensional difference in the height direction between the and. The inclination angle α of the inclined pipe C is not particularly limited, but when considering the workability and the behavior of the drainage flowing down inside, it is about 15 degrees to about 4 degrees.
It is preferably in the range of about 5 degrees.

Next, the behavior of drainage flowing through the drainage pipe 1 constructed as described above will be described with reference to FIG. The behavior of the drainage shown in this figure is a record when the inventor of the present invention configures the conduit shown in FIG. 2 by using a transparent pipe and drains the drainage.

As shown in FIG.
At the cross section A-A, a gap functioning as an air passage 13 is formed between the upper surface of the drainage 12 and the inner surface of the upper portion of the drainage pipe 1 at the cross section AA. When the drainage reaches the elbow 10a from the drain pipe 1, the cross section B-B, the cross section C-C, the cross section E-E, the cross section F
In -F, a clear air passage 13 is always formed. Further, when the drainage 12 flows down the straight pipe 11a, a clear air passage 13 is secured in the cross section GG.

In particular, in FIG. 3, at the cross-section D-D, the impression is that the air passage is closed. This cross-sectional portion is the end portion of the elbow 10a and is a continuous portion formed at the cross-section C-C. It is possible to circulate through the air passage 13.

Therefore, it is clear that the air passage 13 is always secured between the drainage 12 and the inner surface of each part 1, 10a, 11a while flowing down the straight pipe 11a from the drainage pipe 1. The air sucked along with the generation of drainage on the upstream side of 1 flows through the air passage 13 formed inside the drain pipe 1 and the inclined pipe C, and the drainage basin B is opened. Therefore, abnormal high pressure does not occur in a part of the drain pipe 1, and smooth and reliable drainage can be realized.

Next, the connection structure according to the third embodiment will be described with reference to FIG. In the figure, the above-mentioned first embodiment
The same parts as those in 2 and parts having the same functions are designated by the same reference numerals and the description thereof will be omitted.

This embodiment uses the drainage basin B used in the second embodiment, and when the drainage pipe 1 is connected to the connecting portion 8c of the basin body 8, the inclined pipe D is formed at a part of the descending portion. Is configured. In this embodiment, since the inclined portion is short,
It is possible to realize smooth and reliable drainage and improve workability.

The inclined pipe D includes an elbow 10a attached to the end of the drain pipe 1, a short straight pipe 11a attached to the elbow 10a, and a 45 ° elbow 14 attached to the lower end of the straight pipe 11a. A vertical pipe 15 attached to the lower side of the elbow 14, a 90-degree elbow 16 arranged vertically, and a straight pipe 11b connecting the elbow 16 and the connecting portion 8c of the rod body 8.

As described above, the inclined pipe D in this embodiment is
Is formed between the end of the drain pipe 1 and the lower side of the elbow 14, but drainage is discharged from the drain pipe 1 to the elbow 10a and the straight pipe 11.
The behavior after the step a) is the same as that of the second embodiment described above, and therefore, it is possible to form a continuous air path from the drain pipe 1 to the inclined pipe D. Therefore, it is possible to realize smooth drainage.

Next, a connection structure according to the fourth embodiment will be described with reference to FIGS. In the figure, the same parts and parts having the same functions as those of the first to third embodiments described above are designated by the same reference numerals and the description thereof will be omitted.

The connection structure of the present embodiment uses the drainage basin E configured to receive the drainage from the drainage pipe 1 in parallel with the site drainage pipe 3, and the pipe at the portion connecting from the drainage pipe 1 to the drainage basin E is used. The inclined pipe D according to the third embodiment described above is used, and the inclined direction of the inclined pipe D is set to the opposite direction to the circulation direction of the site drainage pipe 3.

In the figure, the basin body 17 of the drainage basin E is provided with the connecting portions 17a and 17b of the site drainage pipe 3, which is adjacent to and parallel to the upstream connecting portion 17a. Is provided. The basin body 17 is configured so that the drainage from the drainage pipe 1 can be merged in parallel with the drainage flowing through the site drainage pipe 3. Therefore, the drainage basin E can be installed at a position closer to the building than the drainage basin B described above.

Elbow 10 attached to the end of the drain pipe 1.
“A” has a posture inclined 45 degrees to the upstream side of the site drainage pipe 3. A straight pipe 11a is attached to the elbow 10a,
Further, a 45-degree elbow 14 is attached to the straight pipe 11a, so that an inclined pipe D is formed. A vertical pipe 15 and an elbow 16 are attached to the lower end of the elbow 14,
A straight pipe 18 is attached by connecting the connecting portion 17c of the sill body 17 with the pipe 16.

In the connection structure constructed as described above, when the drainage is transferred from the drainage pipe 1 to the inclined pipe D, an air passage continuous to the drainage pipe 1 and the inclined pipe D is used as in the second embodiment. Is formed.

In particular, as shown in FIG. 6, the drainage 12 is accelerated by flowing down the inclined pipe D, and is accelerated at the part where the 45 ° elbow 14 moves to the vertical pipe 15 and the elbow 16.
It strikes the opposite tube wall across. At this time, drainage 12
The flow velocity of is greater than the velocity when flowing through the drain pipe 1,
Moreover, since the flow rate is constant, the cross-sectional area of the drainage 12 with respect to the cross section of the elbow 14 (the cross-sectional area within the vertical plane of the drainage 12 flowing down) becomes relatively small.

Therefore, when traversing the vertical pipe 15, drainage is required.
12 flows down from the elbow 14 along the outside, and a continuous air passage 13 is formed on one side or both sides without blocking the entire cross section of the vertical pipe 15. Further, when the drainage 12 flows from the vertical pipe 15 to the elbow 16 and the straight pipe 18, the drainage 12 flows to the vertical pipe 15,
The elbow 16 flows down along the pipe wall corresponding to the upstream side of the site drainage pipe 3, and in this portion, it is possible to realize a smooth flow without being blocked by the drainage 12.

As described above, when descending from the high level, which is the installation level of the drainage pipe 1, to the low level, which is the installation level of the site drainage pipe 3, a part of it is inclined to close the pipeline by drainage. It is possible to prevent this and realize smooth and reliable drainage.

[0068]

As described above in detail, in the connecting structure according to the present invention, the drain pipe from the building is connected to the connecting portion of the drainage basin, so that the elbow or the like is not interposed between the connecting portions. . Therefore, even if a large amount of drainage is generated at one time, the drainage does not block the drain pipe, and
The air passage can be maintained with water distribution. Therefore, it is possible to eliminate fluctuations in the internal pressure of the drainage pipe, prevent breakage of the sealed water at the drainage source connected to the drainage pipe, and realize good drainage. Also, since the elbow is not required, the site drainage pipe can be brought closer to the foundation.

In particular, by adjusting the length of the connecting portion of the tee member by the tubular member constituting the drainage basin so as to be equal to the installation level of the drainage pipe, regardless of the installation level of the drainage pipe, The drainage pipe can be connected to the drainage basin while penetrating the foundation.

Installation of the drain pipe By using at least a part of the pipe that descends from the high level to the low level connected to the basin body as an inclined pipe, the drainage flowing through the drain pipe is held in the air passage and the inclined pipe Therefore, it is possible to eliminate the fluctuation of the pressure in the air layer of the drainage pipe, prevent breakage of the drainage source connected to the drainage pipe, and realize good drainage.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a connection structure according to a first embodiment.

FIG. 2 is a diagram illustrating a connection structure according to a second embodiment.

FIG. 3 is a diagram illustrating a flow of drainage when a drain pipe is changed to an inclined pipe in the connection structure of the second embodiment.

FIG. 4 is a diagram illustrating a connection structure according to a third embodiment.

FIG. 5 is a diagram illustrating a connection structure according to a fourth example.

FIG. 6 is a diagram illustrating the flow of drainage in the connection structure according to the fourth embodiment.

FIG. 7 is a diagram showing a conventional general connection structure between a drainage pipe and a drainage basin.

FIG. 8 is a diagram illustrating a problem in a conventional connection structure.

[Explanation of symbols]

A, B, E drainage basin C, D inclined pipe 1 drainage pipe 2 foundation 2a Rising part 3 site drainage pipe 4,8,17 Masu body 4a connection part 5 Cylindrical member 6 tee members 6a connection part 6b eaves member 7 lid 8a, 8b flow path 8c connection 10a, 10b elbow 11a, 11b straight pipe 12 drainage 13 airway 14 45 degree elbow 15 Vertical tube 16 Elbow 17a to 17c Connection part 18 straight pipe

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoshitaka Ota             4-3-1 Honakayama, Funabashi City, Chiba Prefecture F-term (reference) 2D063 BA15 DA24

Claims (3)

[Claims] 1. A connection between a drainage pipe from a building and a drainage pipe provided on a site drainage pipe, which is provided on the outer periphery of the building and has a flowing water level lower than the drainage pipe, and has a diameter larger than the diameter of the drainage pipe. A structure, wherein the drainage basin has a main body portion having a water channel connected to a site drainage pipe at a bottom portion, a connection portion connecting the drainage pipe to an upper side of the main body portion, and a tubular portion. And a drainage pipe and a drainage pipe are connected to a connection portion of the drainage pipe. 2. The cylindrical portion forming the drainage basin has a function of adjusting the length so that the level of the connecting portion becomes equal to the installation level of the drainage pipe. Connection structure between the drain pipe and the drainage basin described. 3. A connection structure between a drainage pipe from a building and a drainage pipe provided on a site drainage pipe that is piped on the outer periphery of the building and has a flowing water level lower than the drainage pipe, wherein the drainage pipe is It has a main body part that is connected to the site drainage pipe at the bottom and provided with a water channel connected to the end part of the drainage pipe, and from the installation high level of the drainage pipe to the low level of the end part connected to the main body part. A structure for connecting a drainage pipe and a drainage pipe, wherein at least a part of the descending pipe is an inclined pipe.