JP2004143776A - Drainage structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide drainage structure that can easily ensure the drainage slope of a drain branch pipe connected to a catch basin. <P>SOLUTION: A recessed part 15 exposing the ground is formed at a flat slab part 10 formed of concrete under the floor of a first story. The catch basin 12 is installed on the ground after being disposed in the recessed part 15 so that the upper part is projected from the flat slab part 10, and the drain branch pipes 11 (11a-11e) are connected to the upper part of the catch basin 12. The installed position of the catch basin 12 can thereby be made lower than the case of installing the catch basin 12 at the flat slab part 10, and as a result, the drainage slope of the drain branch pipes 11 (11a-11e) connected to the catch basin 12 can be easily ensured. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a drainage structure for draining drainage from a plurality of drains in a building to the outside.
[0002]
[Background technology]
As an example of a drainage structure of a building such as a house, the following technology is known. In other words, this technology is a drain pipe structure for draining drain water from a plurality of drain ports in a building to the outside, and a plurality of drain branches respectively connected to the plurality of drain ports and piped inside the foundation. A pipe, an internal drainage mass installed inside the foundation and connected to the drainage branch pipe, an external drainage mass installed outside the foundation, and piped through the foundation to form the internal drainage mass A connection drain pipe for connecting the external drain mass.
In such a drainage structure, since there is no need to extend a plurality of drainage branch pipes to the outside of the foundation, there is no need to arrange an external drainage mass for each drainage branch pipe, thereby facilitating drainage piping work. In addition, since only one hole that penetrates the connection drainage pipe may be formed in the foundation, it is possible to save the time and effort of forming a plurality of holes, which has been conventionally required (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP 2001-348927 A
[0004]
[Problems to be solved by the invention]
By the way, the internal drainage mass to which a plurality of drainage branch pipes are connected is installed on the ground inside the foundation.For example, a lithographic part made of concrete is provided inside the foundation for moisture protection under the floor. However, if the foundation itself is a solid foundation, the underfloor will be shallow by the thickness of these lithographic parts, so if an internal drainage mass is installed in the lithographic part under this floor, the installation position of the internal drainage mass will be the thickness of the lithographic part Will be expensive. When the installation position of the internal drainage mass is increased, there is a problem that it becomes difficult to take the water gradient of the drainage branch pipe connected to the internal drainage mass.
In addition, when the number of drainage branch pipes increases or the amount of drainage increases, increasing the size of the internal drainage mass increases the height of the internal drainage mass and increases the drainage connected to the internal drainage mass. There is a problem that the water gradient of the branch pipe becomes difficult to take.
[0005]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a drainage structure that can easily take a water gradient of a drainage branch pipe connected to a drainage mass.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1, for example, as shown in FIGS. 1 to 3, drains water from a plurality of drains in a building by drain branch pipes 11 (11 a to 11 e). A drainage structure for concentrating in a centralized drainage section (for example, drainage mass) 12 provided under the first floor, and draining the water from the centralized drainage section 12 to the outside by a drainage main pipe 13;
A lithographic portion 10 made of concrete is provided on the ground under the first floor over substantially the entire area of the ground under the first floor,
The planographic portion 10 has a recess 15 for exposing the ground,
The central drainage portion 12 is arranged in the recess 15 such that the drainage branch pipe connecting portion 12a connecting the drainage branch pipes 11 (11a to 11e) is located above the planographic portion 10, and then the ground is drained. It is installed in
The drain main pipe 13 is arranged in the recess 15 and then extends outside the foundation K.
[0007]
Here, as an example of the case where the underfloor is formed of concrete, the planographic portion 10 may be formed by pouring moisture-proof concrete inside a foundation (cloth foundation), or a solid foundation may be used. .
The centralized drainage section 12 includes a drainage mass 12, a drainage header, and the like.
Further, in order to extend the drain main pipe 13 to the outside of the foundation K, for example, the drain main pipe 13 may extend outward by penetrating the rising portion K1 of the foundation K, or may extend through the ground below the foundation K. It may be extended outward.
[0008]
According to the first aspect of the present invention, the concave portion 15 is formed in the planographic portion 10, and the centralized drainage portion 12 such as a drainage mass is disposed in the concave portion 15 and is installed on the ground. 10, the installation position of the centralized drainage section 12 can be lowered, and therefore, the water gradient of the drainage branch pipes 11 (11 a to 11 e) connected to the centralized drainage section 12 can be easily taken. it can.
In addition, since the drain main pipe 13 is disposed in the concave portion 15, the drain main pipe 13 is lower than the drain branch pipes 11 (11a to 11e). Through this, drainage to the drain main pipe 13 is facilitated.
[0009]
According to a second aspect of the present invention, as shown in FIG. 10, for example, centralized drainage provided from a plurality of drainage ports in a building by a plurality of drainage branch pipes 11 (11a to 11e) below the first floor. A drainage structure for draining water from the centralized drainage part (for example, drainage mass) 12 to the outside by a drainage main pipe 13
A concave portion 45 is formed in the ground G under the first floor,
In the recess 45, the centralized drainage part 12 is installed such that the drainage branch pipe connection part 12a connecting the drainage branch pipe 11 is located above the ground surface,
The drain main pipe 13 is arranged in the recess 45 and then extends outside the foundation K.
[0010]
According to the second aspect of the present invention, since the centralized drainage section 12 such as a drainage mass is disposed in the concave portion formed in the ground below the first floor and installed on the ground, the centralized drainage section 12 is installed on the ground surface 10. The installation position of the centralized drainage section 12 can be made lower than in the case where the drainage branch pipes 11 (11a to 11e) connected to the centralized drainage section 12 can be easily provided with a water gradient.
Further, since the drain main pipe 13 is disposed in the concave portion, the drain main pipe 13 is lower than the drain branch pipes 11 (11a to 11e), and therefore, from the drain branch pipes 11 (11a to 11e) via the central drain section 12. Thus, drainage to the drain main pipe 13 is facilitated.
[0011]
The invention according to claim 3 is the drainage structure according to claim 1,
The drain branch pipes 11 (11a to 11e) have a downward slope from the drain port to the central drain section 12.
The main drainage pipe 13 is buried in the ground.
[0012]
According to the third aspect of the present invention, since the drain branch pipes 11 (11a to 11e) have a downward slope from the drain port to the central drain section 12, one end of the drain branch pipe 11 (11a to 11e). Can be reliably connected to the upper part of the centralized drainage section 12, so that the water gradient of the drainage branch pipes 11 (11a to 11e) can be ensured.
Further, when the lithographic part 10 made of concrete is provided on the ground under the first floor, the drainage branch pipes 11 (11a to 11e) are arranged on the lithographic part 10, so the construction of the drainage branch pipe 11 is performed. Can be performed after concrete work for forming the planographic portion 10. In other words, when embedding a drainage branch pipe in the ground, pipe the drainage branch pipe into the ground before concrete work, perform concrete work to form a lithographic part, and then connect the drainage branch pipe and drainage port. However, according to the present invention, after the concrete work for forming the planographic portion 10, the drain branch pipe 11 can be worked once.
Further, since the drain main pipe 13 is buried in the ground, the drain main pipe 13 is not exposed on the planographic portion 10 or the ground. Although the drain main pipe 13 is thicker than the drain branch pipes 11 (11a to 11e), since the thick drain main pipe 13 is not exposed, the drain main pipe 13 does not hinder the work under the floor, and the workability under the floor is improved. .
[0013]
The invention according to claim 4 is the drainage structure according to claim 1 or 2,
The central drainage part 12 is characterized in that its lower part is buried in the ground.
[0014]
According to the invention described in claim 4, since the lower part of the centralized drainage part 12 is buried in the ground, the installation position of the centralized drainage part 12 can be further lowered, and therefore, the drainage branch pipes 11 (11a to 11e) can be further reduced. The water gradient can be easily taken.
[0015]
The invention according to claim 5 is the drainage structure according to any one of claims 1 to 4,
The drainage branch pipe connection part 12a of the centralized drainage part 12 to which the drainage branch pipes 11 (11a to 11e) are connected is located higher than the drainage main pipe connection part 12b to which the drainage main pipe 13 is connected. I do.
[0016]
According to the fifth aspect of the present invention, since the drain branch pipe connection part 12a is located at a position higher than the drain main pipe connection part 12b, it flows through the drain branch pipes 11 (11a to 11e) and concentrates on the central drain part 12. The drainage can be easily drained from the drainage main pipe 13 to the outside.
[0017]
According to a sixth aspect of the present invention, in the drainage structure according to any one of the first to fifth aspects, at least one drainage branch pipe among the drainage branch pipes 11 (11a to 11e) is flexible. Characteristic.
[0018]
According to the invention as set forth in claim 6, since at least one drain branch pipe 11 (11a to 11e) has flexibility, the drain branch pipe 11 (11a to 11e) can be placed under the floor at a desired level. The drainage branch pipes 11 (11a to 11e) can be easily connected to the drainage ports by arranging them while bending as described above.
[0019]
The invention according to claim 7 is directed to a drainage structure according to any one of claims 1 to 6, as shown in FIGS.
The drain branch pipes 11 (11a to 11e) are characterized in that at least one place is supported by a support member 36 installed on the planographic portion 10 or the ground.
[0020]
According to the seventh aspect of the present invention, since the drain branch pipes 11 (11a to 11e) are supported by the support members 36, the water gradient of the drain branch pipes 11 (11a to 11e) can be reliably obtained. .
In addition, since the support member 36 is installed on the planographic portion 10 or the ground, the drainage branch pipes 11 (11a to 11e) can be arranged with a predetermined water gradient before building the building frame on the foundation.
[0021]
The invention according to claim 8 is the drainage structure according to any one of claims 1 to 7,
The centralized drainage section 12 is a drainage mass 12, and an inspection port is provided at a position higher than the drainage branch pipe connection portion 12a of the drainage mass 12.
[0022]
For example, the upper end opening of the drainage mass 12 may be opened and closed by the lid 12c, and the upper end opening may be used as an inspection port.
[0023]
According to the eighth aspect of the present invention, since the inspection port of the drainage mass 12 is located at a position higher than the drainage branch pipe connection portion 12a, the drainage mass 12 can be easily inspected under the floor.
[0024]
The invention according to claim 9 is the drainage structure according to any one of claims 1 to 8,
A moisture-proof sheet 40 is provided so as to cover the concave portion 15 over the entire surface of the planographic portion 10 or the ground.
[0025]
According to the invention described in claim 8, the moisture-proof sheet 40 is laid on the planographic portion 10 or the ground so as to cover the concave portion 15, so that intrusion of water or moisture from the ground to the floor below can be prevented.
[0026]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the drainage structure according to the present embodiment discharges drainage from a plurality of drainage ports in a building having a slab 10 made of concrete below the first floor. Thus, a drainage structure for concentrating on a centralized drainage section 12 provided under the first floor and draining the water from the centralized drainage section 12 to the outside by a drainage main pipe 13 is provided.
[0027]
The lithographic part 10 is finished with moisture-proof concrete in order to prevent generation of water vapor from the ground surface under the floor and to secure a dry state of the floor set. In the planographic portion 10, a concave portion 15 for exposing the ground is formed near the foundation K. The concave portion 15 has a rectangular shape in plan view, and is arranged such that its short side is parallel to the foundation K and its long side is perpendicular to the foundation K. In addition, one short side is arranged along the foundation K. In addition, the bottom of the concave portion 15 is open, so that the ground can be exposed.
[0028]
There are five drain branch pipes 11 in the present embodiment.
The drain branch pipe 11a is a drain pipe from a bath unit, the drain branch pipe 11b is a drain pipe from a washroom, the drain branch pipe 11c is a drain pipe from a washing machine, the drain branch pipe 11d is a drain pipe from the second floor, and 11e is a kitchen. Drain pipe from the sink. These drain branch pipes 11 (11a to 11e) are formed of resin and have a cylindrical shape having a large number of bellows on the outer periphery, and have flexibility.
[0029]
As shown in FIG. 4, the drain branch pipe 11a is connected to a drain trap 16 which is a drain port of a bus unit. The drain trap 16 joins drain water from the bathtub 17 and the washing place 18, and the drain trap 16 is provided with a connecting portion 16a, and the drain branch pipe 11a is connected to the connecting portion 16a. The bath unit including the bathtub 17 and the washing place 18 is supported by legs 19.
As shown in FIG. 5, the drain branch pipe 11 b is connected via an elbow 22 to a lower end of a pipe 21 provided vertically through the floor 20 on the first floor. The lower end of the pipe 21 is used as a drain port for a washroom. The upper end of the pipe 21 is connected to a drain pipe of a wash basin.
The drain pipe 11e is connected to the pipe 21 similarly to the drain branch pipe 11b, and the upper end of the pipe 21 is connected to a drain pipe of a kitchen sink.
[0030]
As shown in FIG. 6, the drain branch pipe 11c is connected to a drain trap 25 serving as a drain port via an elbow 26.
The drain trap 25 is attached to a lower surface of the waterproof pan 27 for the washing machine, and a drain hose of the washing machine is connected to a connection portion 25a of the drain trap 25.
As shown in FIG. 7, when there is no waterproof pan 27 for the washing machine, the drain branch pipe 11c is connected via an elbow 29 to a drain trap 28 provided in the floor 20 on the first floor.
As shown in FIG. 8, the drain branch pipe 11 d is provided so as to vertically penetrate the floor section 20 on the first floor, and is connected to a pipe 30 serving as a drain port via an elbow 31. The pipe 30 extends from the second floor, and the upper end of the pipe 30 penetrates through the second floor, for example, and is connected to a drain pipe such as a wash basin on the second floor. The pipe 30 passes through a pipe space 31 provided on the first floor.
[0031]
In addition, as shown in FIGS. 1 to 3, a central drainage part 12 is arranged in the concave part 15 formed in the planographic part 10 and installed on the ground. The central drainage portion 12 is a drainage mass 12, a lower portion of the drainage mass 12 is buried in the ground, and an upper portion protrudes above the planographic portion 10.
The drainage mass 12 has a substantially cylindrical shape, and is provided with six drainage branch pipe connection portions 12a on the upper outer peripheral wall. In the present embodiment, the six drainage branch pipe connection portions 12a are provided. The drainage branch pipes 11a to 11e are connected to five drainage branch pipe connection portions 12a, respectively. The remaining one drainage branch pipe connection part 12a is provided with a detachable plug, so that when the drainage branch pipe 11 is newly added, the drainage branch pipe 11 is connected.
In addition, the drain branch pipe connection part 12a is cylindrical, The base end part is opened in the drainage mass 12, and the drain branch pipe 11 is connected to the front-end | tip part.
[0032]
A drain main pipe 13 is disposed in the concave portion 15 of the planographic portion 10, and the drain main pipe 13 penetrates a rising portion K <b> 1 of the foundation K and is further connected to an external drain mass 35. A drain main pipe connection 12b is provided on a lower outer peripheral wall of the drainage mass 12, and a drain main pipe 13 is connected to the drain main pipe connection 12b.
The drain main pipe 13 is formed by connecting a plurality of pipes 13a by elbows 13b, and is provided with a water gradient such that the farther from the drain mass 12, the lower the position.
The base end of the drainage main pipe 13 is buried in the ground by digging up the ground in the recess 15, installing it in that part, and burying it.
[0033]
Further, a lid 12c is covered on the upper end opening of the drainage mass 12, and by removing the lid 12c, the upper end opening of the drainage mass 12 is opened, and this portion serves as an inspection port. This inspection port is also used as a work port for periodically inspecting the drainage mass 12 for clogging and dirt adhesion and removing clogging and dirt.
[0034]
The drainage branch pipes 11 (11a to 11e) connected to the drainage branch pipe connection portions 12a of the drainage mass 12, respectively, include the above-described bath unit, wash basin, washing machine, sink, and drain pipes from the second floor. A water gradient that is a downward gradient from each drain port to the drain branch pipe connection portion 12a is provided.
That is, the drainage branch pipe 11 is supported at a plurality of locations by the plurality of support members 36, and is fixed to the foundation by the fixing members 37 at portions penetrating the foundation.
As shown in FIG. 9, the support member 36 is provided with an installation plate 36a, support rods 36b, 36b erected on both ends of the installation plate 36a, and threaded on the outer periphery. A pair of upper and lower holding bands 36c, 36c, which are installed between the support rods 36b and through which the support rods 36b, 36b penetrate, and a pair of upper and lower nuts 36d, 36d respectively screwed into the threads of the support rods 36b, 36b. I have.
[0035]
In the support member 36, the upper and lower height positions of the holding bands 36c, 36c are adjusted by turning the lower nuts 36d, 36d, and the drainage branch pipe 11 is positioned between the central concave portions of the holding bands 36c, 36c. Is inserted, and the upper nuts 36d, 36d are tightened, so that the drainage branch pipe 11 is held by the holding bands 36c, 36c.
Therefore, such support members 36 are arranged at predetermined intervals, and are set on the installation plate 36a of the planographic portion 10, and then the heights of the holding bands 36c, 36c of the respective support members 36 are adjusted. The drainage branch pipes 11 are clamped at a plurality of positions by the respective holding bands 36c, 36c, and are further fixed to the foundation by the fixing members 37. There is a water gradient that goes downhill.
[0036]
Further, a moisture-proof sheet 40 is laid on the entire upper surface of the planographic portion 10 so as to cover the recess 15. The moisture-proof sheet 40 is laid so as not to cover the drainage mass 12, and its edge is continuous with the inner surface of the foundation K.
[0037]
After the foundation K is constructed or at the same time as the foundation is constructed, the drainage structure constructed as described above constructs the lithographic portion 10 inside the foundation K, and the drainage mass 12 is formed in the recess 15 formed in the lithographic portion 10. Is disposed on the ground, and the drain branch pipe 11 and the drain main pipe 13 are disposed at predetermined positions. Then, the drain branch pipe 11 is temporarily fixed to an inner foundation or a support member 36, and furthermore, moisture proof. After laying the sheet 40 and constructing the frame of the building on the foundation, the construction is performed by connecting the drain branch pipe 11 to a drain port provided on the first floor of the building.
[0038]
According to the drainage structure of the present embodiment, the following effects can be obtained.
(1) Since the concave portion 15 is formed in the planographic portion 10 and the drainage mass 12 is arranged in the concave portion 15 and is installed on the ground, the drainage mass 12 is formed in comparison with the case where the drainage mass 12 is installed in the planographic portion 15. The installation position can be lowered, so that the water gradient of the drain branch pipe 11 connected to the drain mass 12 can be easily obtained.
(2) Since the drain main pipe 13 is disposed in the concave portion 15, the drain main pipe 13 is lower than the drain branch pipe 11, so that drainage from the drain branch pipe 11 to the drain main pipe 13 via the drain mass 12 is easy. It becomes.
(3) Since the drain branch pipe 11 is disposed on the planographic portion 10, one end of the drain branch pipe 11 can be reliably connected to the drain branch pipe connection portion 12a located above the drain mass 12, so that The water gradient of the drain branch pipe 11 can be ensured.
[0039]
(4) Since the drain main pipe 13 is buried in the ground and the thick drain main pipe 13 is not exposed, the drain main pipe 11 does not hinder the work under the floor, and the workability under the floor is improved.
(5) Since the lower portion of the drainage mass 12 is buried in the ground, the installation position of the drainage mass 12 can be further lowered, and therefore, the water gradient of the drainage branch pipe 11 can be easily taken.
(6) Since the drainage branch pipe connection portion 12a of the drainage mass 12 is located higher than the drainage main pipe connection portion 12b, the drainage flowing through the drainage branch pipe 11 and concentrated on the drainage mass 12 can be easily discharged from the drainage main pipe 13 to the outside. Can be drained.
(7) Since the drain branch pipe 11 has flexibility, the drain branch pipe 11 is arranged under the floor while being bent as desired, so that the drain branch pipe 11 is placed in a bath unit, a sink, and a washing machine. It can be easily connected to each drain outlet, such as a sink, a drain pipe from the second floor, etc.
[0040]
(8) Since the drain branch pipe 11 is supported by the support member 36 and the fixing member 37, the water gradient of the drain branch pipe 11 can be reliably ensured. In addition, since the support member 36 is installed on the planographic portion 10, the drain branch pipes 11 (11a to 11e) can be arranged with a predetermined water gradient before building the building frame on the foundation.
(9) Since the inspection port of the drainage mass 12 is located at the upper end opening of the drainage mass 12, that is, at a position higher than the planographic portion 10, the drainage mass 12 can be easily inspected under the floor.
(10) Since the moisture-proof sheet 40 lays the planographic portion 10 so as to cover the concave portion 15, it is possible to prevent water and moisture from entering the floor below the ground.
In the present embodiment, an example is described in which the lithographic part 10 finished with moisture-proof concrete is constructed inside the cloth foundation K. However, when the foundation is a solid foundation, a concave part 15, the drainage mass 12 may be arranged in the recess 15 and installed on the ground.
[0041]
FIG. 10 shows another embodiment of the drainage structure according to the present invention. The drainage structure shown in this figure is different from the drainage structure shown in FIGS. 1 to 9 in that the ground floor below the ground floor is a flat ground G without using a concrete slab, and a concave portion 45 is formed in the ground G. Is formed, and the drainage mass 12 is installed in the concave portion 45. Other components are common to the drainage structure shown in FIGS. Will be simplified or omitted.
[0042]
In the present embodiment, the drainage mass 12 is installed in the recess 45 such that the drainage branch pipe connection portion 12a is located above the ground surface. The recess 45 has a rectangular shape in plan view similarly to the recess 15, and is arranged such that its short side is parallel to the base K and its long side is perpendicular to the base K. In addition, one short side is arranged along the foundation K.
The drain main pipe 13 is disposed in the recess 45 and extends outward through the rising portion K1 of the foundation K.
[0043]
According to the present embodiment, the following effects can be obtained.
(1) Since the concave portion 45 is formed in the ground G and the drainage mass 12 is installed in the concave portion 45, the installation position of the drainage mass 12 can be lowered as compared with the case where the drainage mass 12 is installed on the ground surface. The water gradient of the drain branch pipe 11 connected to the drain mass 12 can be easily set.
(2) Since the drain main pipe 13 is disposed in the concave portion 45, the drain main pipe 13 is lower than the drain branch pipe 11, so that drainage from the drain branch pipe 11 to the drain main pipe 13 via the drain mass 12 is easy. It becomes.
In this embodiment, the same effects as those of (3) to (10) can be obtained.
[0044]
In the above-described two embodiments, an example is described in which the drainage mass 12 is applied as the centralized drainage portion disposed on the lithographic portion 10 or the concave portions 15 and 45 formed on the ground and installed on the ground. The header portion may be used as a centralized drainage portion instead of the drainage mass. The header portion includes a header having a diameter larger than that of the drain main pipe 13, and has a connection portion for connecting the drain main pipe 13 and a connection portion for connecting the plurality of drain branch pipes 11 to the header. It is similar to the mass 12, but has the advantage of being smaller in volume than the drain mass 12 and of being relatively easy to install.
[0045]
【The invention's effect】
As described above, according to the first aspect of the present invention, since the centralized drainage section is disposed in the concave portion formed in the planographic section and installed on the ground, the installation position of the centralized drainage section can be lowered, and The water gradient of the drain branch pipe connected to the central drain section can be easily obtained.
Further, since the drain main pipe is disposed in the concave portion, the drain main pipe is lower than the drain branch pipe, so that drainage from the drain branch pipe to the drain main pipe via the centralized drain section becomes easy.
[0046]
According to the invention as set forth in claim 2, since the centralized drainage section such as a drainage mass is disposed in the recess formed in the ground below the first floor and installed on the ground, the centralized drainage section is installed on the ground surface. In comparison, the installation position of the centralized drainage section can be lowered, and therefore, the water gradient of the drainage branch pipe connected to the centralized drainage section can be easily obtained.
Further, since the drain main pipe is disposed in the concave portion, the drain main pipe is lower than the drain branch pipe, so that drainage from the drain branch pipe to the drain main pipe via the centralized drain section becomes easy.
[0047]
According to the third aspect of the present invention, the water gradient of the drain branch pipe can be reliably obtained.
In addition, since the drain main pipe is buried in the ground, the drain main pipe does not hinder work under the floor, and workability under the floor is improved.
[0048]
According to the fourth aspect of the invention, since the lower part of the centralized drainage part is buried in the ground, the installation position of the centralized drainage part can be further lowered, and the water gradient of the drainage branch pipe can be easily taken. .
[0049]
According to the fifth aspect of the present invention, since the drain branch pipe connection portion is located at a position higher than the drain main pipe connection portion, the drainage flowing through the drain branch pipe and concentrated in the central drain portion can be easily discharged from the drain main pipe to the outside. Can be drained.
[0050]
According to the invention as set forth in claim 6, since at least one or more drainage branch pipes have flexibility, the drainage branch pipes can be easily connected to the drain port under the floor and the drainage branch pipes.
[0051]
According to the seventh aspect of the present invention, since the drain branch pipe is supported by the support member, the water gradient of the drain branch pipe can be reliably ensured.
Further, since the support member is installed on the planographic portion or the ground, the drainage branch pipe can be arranged with a predetermined water gradient before building the building frame on the foundation.
[0052]
According to the invention as set forth in claim 8, since the inspection port of the drainage mass is located at a position higher than the drain branch pipe connection portion, the drainage mass can be easily inspected under the floor.
[0053]
According to the ninth aspect of the present invention, since the moisture-proof sheet is laid on the planographic portion or the ground so as to cover the concave portion, it is possible to prevent water and moisture from entering the ground from under the floor.
[Brief description of the drawings]
FIG. 1 shows an example of a drainage structure of the present invention, and is a perspective view of the drainage structure.
FIG. 2 is a plan view of the drainage structure.
FIG. 3 is a perspective view of the same drainage structure.
FIG. 4 is a sectional view showing a connection portion between the drain branch pipe and the bus unit.
FIG. 5 is a cross-sectional view showing a connection portion between the drain branch pipe and the washroom.
FIG. 6 is a sectional view showing a connection portion between the drain branch pipe and the washing machine.
FIG. 7 is a cross-sectional view showing another example of a connection portion between the drain branch pipe and the washing machine.
FIG. 8 is a sectional view showing a connection portion between the drain branch pipe and the pipe from the second floor.
FIG. 9 is a front view showing a supporting member for supporting the drain branch pipe.
FIG. 10 shows another example of the drainage structure of the present invention, and is a perspective view of the drainage structure.
[Explanation of symbols]
G ground
K basics
K1 rising part
10 Lithography
11 (11a-11e) Drainage branch pipe
12 Drainage mass (centralized drainage section)
12a Drain branch pipe connection
12b Drain main pipe connection
13 Drain main pipe
15, 45 recess
36 Supporting members
40 Moisture proof sheet

Claims (9)

A drainage structure for draining water from a plurality of drains in a building into a centralized drainage section provided below the first floor by drainage branch pipes and draining the water from the centralized drainage section to the outside by a drainage main pipe. ,
A lithographic portion made of concrete is provided on the ground under the first floor over substantially the entire area of the ground under the first floor,
A concave portion for exposing the ground is formed in the planographic portion,
In this recess, the centralized drainage part is disposed on the ground so that the drainage branch pipe connection part connecting the drainage branch pipe is located above the lithographic part, and the drainage main pipe is provided. And a drainage structure disposed in the recess and extending outside the foundation. A drainage structure that concentrates drainage from multiple drains in the building to a central drainage section provided below the first floor by multiple drainage branches and drains the water from the central drainage section to the outside with a drain main pipe. So,
A recess is formed in the ground below the first floor,
In this concave portion, the centralized drainage section is installed such that a drainage branch pipe connection section that connects the drainage branch pipe is located above the ground surface,
The drainage structure, wherein the drainage main pipe is disposed in the recess and extends outside the foundation. The drainage structure according to claim 1 or 2,
The drain branch pipe has a downward slope from the drain port to the central drain section,
The drainage structure, wherein the drainage main pipe is buried in the ground. In the drainage structure according to any one of claims 1 to 3,
A drainage structure, wherein a lower part of the centralized drainage part is buried in the ground. In the drainage structure according to any one of claims 1 to 4,
The drainage structure wherein the drainage branch pipe connection is located higher than a drainage main pipe connection to which the drainage main pipe is connected. The drainage structure according to any one of claims 1 to 5,
A drainage structure, wherein at least one drainage branch pipe among the plurality of drainage branch pipes has flexibility. In the drainage structure according to any one of claims 1 to 6,
The drainage structure, wherein at least one of the drainage branch pipes is supported by a support member installed on the planographic portion or the ground. The drainage structure according to any one of claims 1 to 7,
A drainage structure, wherein the centralized drainage portion is a drainage mass, and an inspection port is provided at a position higher than the drainage branch pipe connection portion of the drainage mass. In the drainage structure according to any one of claims 1 to 8,
A drainage structure, characterized in that a moisture-proof sheet is laid so as to cover the concave portion over the planographic portion under the first floor or the entire upper surface of the ground.

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