JP2005163383A - Drain piping structure and construction method for drain piping structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drain piping structure and a construction method for the drain piping structure that can considerably reduce labor and costs required for construction work of drain piping without forming a complicated bent drain line. <P>SOLUTION: A 90° bent sheath pipe 3 communicating with inside and outside is embedded in an underfloor foundation 2 of a building, and a flexible pipe 4 is inserted in the sheath pipe 3. A vertical drain pipe 6 communicating with an indoor drain facility 7 of the building is connected to the upstream side of the flexible pipe 4, and an outdoor drain pipe 9 is connected to the downstream side of the flexible pipe 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a drainage pipe structure and a construction method for the drainage pipe structure.

  Conventionally, a flexible pipe that is a bendable pipe is formed by penetrating the downstream end of a bend pipe as a tubular body below the external ground surface of the house and penetrating the upstream end of the bend pipe into the house to form the foundation of the house. There is provided a method for forming a drainage channel that is inserted into the bend pipe, connects the downstream end of the flexible pipe to a drainage channel, and connects the upstream end of the flexible pipe to a drainage facility in a house (see Patent Document 1). .

JP 2002-115294 A (page 4-7, FIG. 1)

However, in the above conventional drainage channel forming method, it is necessary to set the bending angle of the bend pipe small in order to prevent the flexible pipe from sticking at the bent portion of the bend pipe when the flexible pipe is inserted into the bend pipe. In that case, the position where the upstream end of the bend pipe goes out of the foundation will be far from the end of the foundation, and the drainage outlet of the indoor drainage equipment is set at a position close to the end of the foundation. For example, in the case of a drain outlet of a flush toilet, a complicated drainage path that is bent is formed, and the upstream end of the flexible pipe inserted through the bend pipe and the drain outlet of the indoor drainage facility are connected. There is a problem that it is necessary to connect, and drainage piping construction work requires a lot of labor and cost.
In addition, when the foundation of the building is a deep foundation, for example, a foundation of a building built on a sloping ground, if the bending angle of the bend pipe is small, the position where the upstream end of the bend pipe goes out of the foundation is the foundation. Therefore, since it is necessary to use a very long bend pipe or flexible pipe, there is a problem that much labor and cost are required for the construction work of the drain pipe.

As a means for solving the above-described conventional problems, the present invention embeds a 90 ° bent sheath pipe (3) leading into the inside and outside of the underfloor foundation (2) of a building, and the sheath pipe (3) is flexible. Connect the vertical drain pipe (6) that passes through the pipe (4) and communicates with the indoor drainage facility (7) of the building to the upstream side of the flexible pipe (4) in the sheath pipe (3). A drainage pipe structure (1) connected to an outdoor drainage pipe (9) is provided downstream of the pipe (4).
The drainage facility is preferably a flush toilet (7) in which a drainage port (8) is located immediately above the vertical drainage pipe (6).
Further, the 90 ° bent sheath pipe (3) is buried in the deep part of the underfloor foundation (2) of the building, and a straight sheath pipe (19) is connected to the upstream side of the sheath pipe (3). It is desirable that a flexible tube (4) is inserted through the inside of (19) and the 90 ° bent sheath tube (3).
Further, the 90 ° bent sheath pipe (3) is buried deep in the underfloor foundation (2) of the building, and a straight sheath pipe (19) is connected to the upstream side of the sheath pipe (3). A flexible tube (4) is inserted into the sheath tube (3), and a straight tube (35) connected to the flexible tube (4) is inserted into the straight sheath tube (19). Is desirable.
Furthermore, on the upstream side of the flexible tube (4), an offset joint main body (21) having an offset wide-mouth receiving port (24) formed at the upper end and rotatably fitted in the offset wide-mouthed receiving port (24). The lower end receiving port (23) of the offset joint body (21) of the offset joint (20) consisting of the offset short cylinder member (22) is connected, and the offset short cylinder member (22) of the offset joint (20) The vertical drain pipe (6) is preferably connected to the upper end receptacle (26).
Alternatively, on the upstream side of the flexible tube (4), the bent upper joint member (29) and the bent upper joint rotatably connected to the connection receiving port (32) of the bent lower joint member (29) The lower end receiving port (31) of the bent lower joint member (29) of the bent offset joint (28) composed of the joint member (30) is connected via the straight short pipe (27), and the bent offset joint (28) The vertical drain pipe (6) is preferably connected to the upper end receiving port (34) of the bent upper joint member (30).

Further, in the present invention, the underfloor foundation (2) is constructed by building concrete with the 90 ° bent sheath pipe (3) inserted into the interior and exterior of the building underfloor foundation (2) construction part. A flexible pipe (4) is inserted into the sheath pipe (3), and a vertical drain pipe (6) connected to the indoor drainage system (7) is connected to the upstream side of the flexible pipe (4). A drainage pipe construction method for constructing the drainage pipe structure (1) is provided by connecting an outdoor drainage pipe (9) downstream of the flexible pipe (4).
The drainage facility is preferably a flush toilet (7) in which a drainage port (8) is located immediately above the vertical drainage pipe (6).
In addition, the 90 ° bent sheath tube (3) is inserted in the deep part of the building underfloor foundation (2) and the straight sheath tube (19) is connected to the upstream side of the 90 ° bent sheath tube (3). In this state, concrete is erected to construct an underfloor foundation (2), and a flexible tube (4) is inserted into the 90 ° bent sheath tube (3) and the straight sheath tube (19), A vertical drain pipe (6) connected to the indoor drainage system (7) is connected to the upstream side of the pipe (4), and an outdoor drain pipe (9) is connected to the downstream side of the flexible pipe (4). It is desirable to construct the drainage pipe structure (1) above.
Further, the 90 ° bent sheath tube (3) is inserted into the deep part of the building underfloor foundation (2) and the straight sheath tube (19) is connected to the upstream side of the 90 ° bent sheath tube (3). In this state, concrete is erected to construct an underfloor foundation (2), a flexible tube (4) is inserted into the 90 ° bent sheath tube (3), and the flexible sheath (19) is inserted into the flexible sheath tube (19). A straight pipe (35) connected to the pipe (4) is inserted, and a vertical drain pipe (6) connected to an indoor drainage facility (7) is connected to the upstream side of the straight pipe (35), and the flexible pipe It is desirable to connect the outdoor drain pipe (9) to the downstream side of (4) and construct the drain pipe structure (1) above.
Furthermore, on the upstream side of the flexible tube (4), an offset joint body (21) having an offset wide-mouth receiving port (24) formed at the upper end and rotatably fitted in the offset wide-mouthed receiving port (24). The lower end receiving port (23) of the offset joint body (21) of the offset joint (20) consisting of the offset short cylinder member (22) is connected to the upper end of the offset short cylinder member (22) of the offset joint (20). It is desirable to connect the vertical drain pipe (6) to the receiving port (26).
Alternatively, on the upstream side of the flexible pipe (4), a bent upper joint member (29) and a bent upper joint rotatably connected to the connection receiving port (32) of the bent lower joint member (29) The lower end receiving port (31) of the bent lower joint member (29) of the bent offset joint (28) composed of the member (30) is connected via the straight short pipe (27), and the bent offset joint (28) It is desirable to connect the vertical drain pipe (6) to the upper end receiving port (34) of the bent upper joint member (30).

In the drainage pipe structure (1) and the drainage pipe structure construction method of the present invention, the position where the 90 ° bent sheath pipe (3) goes out of the underfloor foundation (2) of the building is determined from the end of the underfloor foundation (2) of the building. It can be set to a close position. Therefore, if the vertical drain pipe (6) connected to the indoor drainage system (7) of the building is set close to the end of the underfloor foundation (2) of the building, for example, the drainage port of the flush toilet (7) Even in the case of (8), the flexible pipe (4) inserted into the 90 ° bent sheath pipe (3) is not formed into a bent complicated drainage path, and the vertical drain pipe (6) Can be connected to.
In addition, if the foundation of the building is a deep foundation, for example, if it is a foundation of a building built on an inclined land, if a straight sheath pipe (19) is connected to the upstream end of the 90 ° bent sheath pipe (3), The position where the straight sheath pipe (19) goes out from the underfloor foundation (2) of the building can be set to a position close to the end of the underfloor foundation (2) of the building.
Further, the vertical drain pipe (6) connected to the position where the 90 ° bent sheath pipe (3) or the straight sheath pipe (19) goes out of the underfloor foundation (2) of the building and the indoor drainage facility (7) of the building. Even if the position is slightly off, contact the flexible pipe (4) in the 90 ° bend sheath tube (3) or the straight sheath tube (19) and the indoor drainage system (7) of the building. If the vertical drain pipe (6) is connected via the offset joint (20) or the bent offset joint (28), the flexible pipe (4) and the vertical drain pipe (6) can be easily connected. I can do it.
Therefore, according to the drain pipe structure (1) and the drain pipe structure construction method of the present invention, labor and cost required for drain pipe construction work can be greatly reduced.

  Hereinafter, the present invention will be described in detail with reference to Examples 1 to 5.

The present invention is illustrated by the example shown in FIGS.
As shown in FIG. 1 and FIG. 2, the drainage pipe structure (1) has a 90 ° bent sheath pipe (3) embedded in the underfloor foundation (2) of the building and connected to the inside and outside of the underfloor foundation (2). And a flexible tube (4) inserted into the 90 ° bent sheath tube (3).
A vertical drain pipe (6) is connected to the upstream side of the flexible pipe (4) via a straight pipe flexible pipe conversion joint (5), and the vertical drain pipe (6) is an indoor drainage facility of the building. It is connected to the drain (8) of the flush toilet (7). On the other hand, an outdoor drain pipe (9) is connected to the downstream side of the flexible pipe (4) via a straight pipe flexible pipe conversion joint (5), and the outdoor drain pipe (9) drains outdoors. (10) to the public (not shown).
In this embodiment, the flexible tube (4) is a double corrugated tube (see FIG. 5).

  When constructing such a drainage pipe structure (1), first insert a 90 ° bent sheath pipe (3) leading into the interior and exterior of the building underfloor foundation (2) construction part. The concrete below is built in to construct the underfloor foundation (2). After constructing the underfloor foundation (2), the portion of the 90 ° bent sheath tube (3) that has gone out upstream is trimmed to a predetermined length, and the length of the trimmed 90 ° bent sheath tube (3) is adjusted. The length of the flexible tube (4) is trimmed in accordance with.

Next, the flexible tube receiving portion (11) of the straight tube flexible tube conversion joint (5) is connected to both ends of the upstream end and the downstream end of the flexible tube (4) (see FIG. 2).
When connecting the straight pipe flexible pipe conversion joint (5) to the flexible pipe (4), first, a cap nut (12) is slidably fitted on the flexible pipe (4), and then An O-ring (13) is fitted to both ends of the flexible tube (4), and a C-ring (14) is fitted to a predetermined position of the flexible tube (4). Then, the flexible tube (4) is inserted into the flexible tube receiving portion (11) of the straight tube flexible tube conversion joint (5), and the locking portion of the cap nut (12) is inserted into the C ring (14). (15) is locked, and the cap nut (12) is screwed onto the conversion joint (5) to be fastened and fixed.

Then, the flexible tube (4) to which the straight tube flexible tube conversion joint (5) is attached is inserted into the 90 ° bent sheath tube (3).
In this embodiment, the 90 ° bent sheath tube (3) has a large bent shape with a thick bent portion (16), and therefore the flexible tube (4) is inserted into the 90 ° bent sheath tube (3). At this time, the straight tube flexible tube conversion joint (5) attached to the tip of the flexible tube (4) does not stick to the bent portion (16) (see FIG. 2).

After that, contact the public pipe through the outdoor drainage (10) to the straight pipe receiving part (17) of the straight pipe flexible pipe conversion joint (5) connected to the downstream end of the flexible pipe (4). Drain the flush toilet (7) to the straight pipe receiving part (17) of the straight pipe flexible pipe conversion joint (5) connected to the drain pipe (9) and connected to the upstream end of the flexible pipe (4). Connect the vertical drain pipe (6) connected to the mouth (8) (see Fig. 2).
When connecting a straight pipe flexible pipe conversion joint (5) to an outdoor drain pipe (9) or vertical drain pipe (6), which is a straight pipe, the straight pipe receiving portion of the straight pipe flexible pipe conversion joint (5) Insert a straight pipe into (17) and fix it with an adhesive.
In this embodiment, the seal ring (18) is attached to the outer peripheral surface of the straight pipe receiving portion (17) of the straight pipe flexible pipe variable joint connected to the downstream end of the flexible pipe (4). By attaching the seal ring (18), the gap between the 90 ° bent sheath tube (3) and the conversion joint (5) is sealed, and rainwater, groundwater, etc. enter the 90 ° bent sheath tube (3). Infiltration can be prevented.

As described above, in the drainage pipe structure (1) using the 90 ° bend sheath pipe (3), the location of the 90 ° bend sheath pipe (3) from the under floor foundation (2) of the building The vertical drain pipe (6) connected to the drainage port (8) of the flush toilet (7) is close to the end of the underfloor foundation (2) of the building. Even if it is set to the position, the flexible pipe (4) inserted into the 90 ° bent sheath pipe (3) is formed into the vertical drain pipe (3) without forming a complicated drainage path bent. 6) can be connected.
Therefore, when constructing the drainage pipe structure (1), it is not necessary to form a complicated drainage path that is bent, so that a smooth water flow can be secured and the labor required for the construction work of the drainage pipe can be reduced. Cost can be greatly reduced.
In this embodiment, the position of the drainage port (8) of the flush toilet (7) is set at a position of 200 mm from the end of the underfloor foundation (2) of the building. In this case, the radius of curvature is By using a 90 ° bent sheath tube (3) having a diameter of 200 mm, the drainage port (8) of the flush toilet (7) is placed directly above the vertical drain pipe (6) connected to the 90 ° bent sheath tube (3). Can be positioned.

FIG. 3 shows another embodiment.
In this embodiment, as shown in FIG. 3, the 90 ° bent sheath tube (3) is embedded in the deep part of the underfloor foundation (2) of the building as compared to the embodiment 1 shown in FIGS. A straight sheath tube (19) is connected to the upstream side of the 90 ° bent sheath tube (3), and a flexible tube (4) is provided in the straight sheath tube (19) and in the 90 ° bent sheath tube (3). ) Is inserted.

When constructing such a drainage pipe structure (1), first, a 90 ° bent sheath pipe (3) is inserted into the deep part of the underfloor foundation (2) construction part of the building, and the 90 ° bent sheath is further inserted. A straight sheath pipe (19) is bonded and connected to the upstream side of the pipe (3) with an adhesive, and concrete is built in that state to construct the underfloor foundation (2).
Then, in the same manner as in Example 1, after connecting the straight pipe flexible pipe conversion joint (5) to both ends of the flexible pipe (4), the flexible pipe (4) is connected to the 90 ° bent sheath pipe (3 ) And a vertical drain pipe (6) passing through the inside of the straight sheath pipe (19) and connected to the indoor drainage facility (7) on the upstream side of the flexible pipe (4). An outdoor drain pipe (9) is connected downstream of 4).

  As mentioned above, in the drainage pipe structure (1) using the 90 ° bendable sheath pipe (3) and the straight sheath pipe (19), when the foundation of the building is a deep foundation, for example, the foundation of a building built on an inclined land In some cases, the straight sheath pipe (19) is connected to the upstream end of the 90 ° bent sheath pipe (3) so that the straight sheath pipe (19) can be moved out of the building's underfloor foundation (2). Can be set close to the edge of the underfloor foundation (2) of the building.

FIG. 4 shows still another embodiment.
In the present embodiment, as shown in FIG. 4, the 90 ° bent sheath pipe (3) is embedded in the deep part of the underfloor foundation (2) of the building as shown in FIG. A straight sheath tube (19) is connected to the upstream side of the bent sheath tube (3), and a flexible tube (4) is inserted into the 90 ° bent sheath tube (3). 19) A straight pipe (35) connected to the flexible pipe (4) is inserted into the pipe.

When constructing such a drainage pipe structure (1), as in Example 2, first, a 90 ° bend sheath pipe (3) is inserted into the deep part of the underfloor foundation (2) construction part of the building. Further, a straight sheath pipe (19) is bonded and connected to the upstream side of the 90 ° bent sheath pipe (3) using an adhesive, and concrete is erected in this state to construct an underfloor foundation (2).
Then, the straight pipe flexible pipe conversion joint (5) is connected to both ends of the flexible pipe (4), the straight pipe (35) is connected to the upstream side of the flexible pipe (4), and then the 90 ° The flexible tube (4) is inserted into the bent sheath tube (3) through the straight tube (35), and the straight tube (35) is inserted into the straight sheath tube (19). A vertical drain pipe (6) connected to the indoor drainage system (7) is connected to the upstream side of the straight pipe (35), and an outdoor drain pipe (9) is connected to the downstream side of the flexible pipe (4).

As mentioned above, in the drainage pipe structure (1) using the 90 ° bendable sheath pipe (3) and the straight sheath pipe (19), when the foundation of the building is a deep foundation, for example, the foundation of a building built on an inclined land In some cases, the straight sheath pipe (19) is connected to the upstream end of the 90 ° bent sheath pipe (3) so that the straight sheath pipe (19) can be moved out of the building's underfloor foundation (2). Can be set close to the edge of the underfloor foundation (2) of the building.
Further, as described above, by inserting the flexible tube (4) through the straight tube (35) into the 90 ° bent sheath tube (3), the 90 ° bent sheath tube (3) is inserted into the 90 ° bent sheath tube (3). The flexible tube (4) is pushed in and inserted very easily.

FIG. 5 shows still another embodiment.
In the first embodiment shown in FIGS. 1 and 2, the upstream end of the flexible tube (4) inserted through the 90 ° bent sheath tube (3) is vertically connected via a straight tube flexible tube conversion joint (5). Whereas the drain pipe (6) was connected, in this embodiment, as shown in FIG. 5, the upstream end of the flexible pipe (4) inserted through the 90 ° bent sheath pipe (3) A vertical drain pipe (6) is connected via an offset joint (20).

The offset joint (20) includes an offset joint body (21) and an offset short tubular member (22), and a lower end receiving port (23) is formed at the lower end of the offset joint body (21). At the upper end of the offset joint body (21), an offset wide-mouth receiving port (24) having a different axis from the lower-end receiving port (23) is formed.
On the other hand, an offset wide opening (25) coaxial with the offset wide opening (24) of the offset joint body (21) is formed at the lower end of the offset short tubular member (22). 22) is formed with an upper end receiving port (26) having a different axis from that of the offset wide opening (25), and the offset short tubular member (22) is formed by the offset wide opening of the offset joint body (21). It can be rotated through an O-ring (36) in the receiving port (24).
Further, in order to prevent the offset short cylindrical member (22) from coming out of the wide offset port (24) on the inner periphery of the upper end of the wide offset port (24) of the offset joint body (21). The locking flange (37) is projected.

When constructing such a drainage pipe structure (1), in the same manner as in Example 1, a 90 ° bent sheath pipe (3) leading to the inside and outside of the building underfloor foundation (2) construction part is installed. After constructing the underfloor foundation (2) by placing the concrete in the inserted state, a straight pipe flexible pipe conversion joint (5) is connected to the downstream end of the flexible pipe (4), and the flexible pipe (4) Is inserted into the 90 ° bent sheath tube (3).
In this embodiment, an offset joint (20) is connected to the upstream end of the flexible tube (4).
When the offset joint body (21) of the offset joint (20) is rotatably connected to the upstream end of the flexible pipe (4), the cap nut (12) can first slide on the flexible pipe (4). Then, an O-ring (13) is fitted to the tip of the flexible tube (4), and a C-ring (14) is fitted to a predetermined position of the flexible tube (4). To do. Then, the flexible tube (4) is inserted into the lower end receiving port (23) of the offset joint body (21), and the locking portion (15) of the cap nut (12) is locked to the C-ring (14). At the same time, the cap nut (12) is screwed and fixed to the lower end receiving port (23).
After that, the vertical drain pipe (6) connected to the drain outlet (8) of the flush toilet (7) is attached to the upper end receptacle (26) of the offset short cylinder member (22) of the offset joint (20) using an adhesive. Glue and connect.

As described above, in the drainage pipe structure (1) using the offset joint (20), the offset joint body (21) is rotated with respect to the flexible pipe (4) and the offset joint body (21) is rotated. By rotating the offset short cylinder member (22), the central axis of the lower end receiving port (23) connected to the flexible tube (4) and the upper end receiving port (26) connected to the vertical drain pipe (6) The position of the 90 ° bend sheath tube (3) or straight sheath tube (19) from the underfloor foundation (2) of the building and the indoor drainage system of the building (7) Even if the position of the vertical drain pipe (6) connected to the pipe is slightly shifted, the flexible pipe (4) and the vertical drain pipe (6) can be easily connected via the offset joint (20). I can do it.
In this embodiment, the distance between the center axis of the lower end receiving port (23) and the center axis of the offset wide end receiving port (24) is set to 35.5 mm, and the center axis and the upper end of the offset wide end receiving port (24) are set. Since the distance from the central axis of the receiving port (26) is set to 32.5 mm, the position of the 90 ° bent sheath tube (3) or straight sheath tube (19) from the underfloor foundation (2) of the building Deviation from the position of the vertical drain pipe (6) connected to the indoor drainage system (7) of the building, that is, the deviation between the central axis of the flexible pipe (4) and the central axis of the vertical drain pipe (6) If it is in the range of 68 mm, the flexible pipe (4) and the vertical drain pipe (6) can be connected via the offset joint (20).

FIG. 6 shows still another embodiment.
In contrast to the fourth embodiment shown in FIG. 5, in this embodiment, a straight pipe flexible pipe conversion joint (5) is provided at the upstream end of the flexible pipe (4) inserted through the 90 ° bent sheath pipe (3). A straight short pipe (27) is connected to the vertical short pipe (27), and a vertical drain pipe (6) is connected to the straight short pipe (27) via a bent offset joint (28) shown in FIG.

  The bent offset joint (28) comprises a bent lower joint member (29) and a bent upper joint member (30), and a lower end receiving port (31) is formed at the lower end of the bent lower joint member (29). In addition, a connection receiving port (32) different from the lower end receiving port (31) is formed at the upper end of the bent lower joint member (29). On the other hand, at the lower end of the bent upper joint member (30), a connection insertion port (33) coaxial with the connection receiving port (32) of the bent lower joint member (29) is formed. ) Is formed with an upper end receiving port (34) having a different axis from that of the connection insertion port (33), and the bent upper joint member (30) is connected to the bent lower joint member (29). It can be rotated in the mouth (32).

When constructing such a drainage pipe structure (1), in the same manner as in Example 1, a 90 ° bent sheath pipe (3) leading to the inside and outside of the building underfloor foundation (2) construction part is installed. After constructing the underfloor foundation (2) by placing concrete in the inserted state, straight pipe flexible pipe conversion joints (5) are connected to both ends of the flexible pipe (4), and the flexible pipe (4) is The 90 ° bent sheath tube (3) is inserted.
In this embodiment, the lower end of the straight short pipe (27) is connected to the straight pipe flexible pipe conversion joint (5) at the upstream end of the flexible pipe (4), and the upper end of the straight short pipe (27) is connected. Is connected to the lower end receiving port (31) of the bent lower joint member (29) of the bent offset joint (28), and further to the upper end receiving port (34) of the bent upper joint member (30) of the bent offset joint (28). Connect the vertical drain pipe (6) to
In this embodiment, when connecting the straight pipe flexible pipe conversion joint (5) to the short pipe (27), the upper end receptacle (34) of the bending offset joint (28) and the vertical drain pipe (6). Are connected to each other using an adhesive, and when connecting the short tube (27) and the lower end receiving port (31) of the bending offset joint (28), a rubber ring (38 ) Through a rubber ring joint.

As described above, in the drainage pipe structure (1) using the bent offset joint (28), the lower bent joint member is rotated with respect to the flexible pipe (4) and the lower bent joint member is rotated. By rotating the upper bent joint member, the central axis of the lower end receiving port (31) connected to the flexible tube (4) via the straight short tube (27) and the vertical drain pipe (6 ) Can be adjusted with the central axis of the upper end receptacle (34) connected to the bottom of the building underfloor foundation (2) of 90 ° bent sheath pipe (3) or straight sheath pipe (19) Even if the position of going out and the position of the vertical drain pipe (6) communicating with the indoor drainage system (7) of the building are slightly shifted, the flexible pipe (4) and the vertical drain pipe (6) It can be easily connected via the bending offset joint (28).
In this embodiment, the distance between the central axis of the lower end receiving port (31) and the central axis of the connection receiving port (32) is set to 35 mm, and the central axis of the connection receiving port (32) and the upper end receiving port (34 ) Is set to 35 mm, so the 90 ° bent sheath tube (3) or straight sheath tube (19) is located outside the building's underfloor foundation (2) and the building's indoor drainage system ( 7) If the deviation from the position of the vertical drain pipe (6) connected to the pipe, that is, the deviation between the central axis of the flexible pipe (4) and the central axis of the vertical drain pipe (6) is within the range of 0 mm to 70 mm. For example, the flexible pipe (4) and the vertical drain pipe (6) can be connected via the bent offset joint (28).

The embodiments of the present invention have been described above by way of examples. However, the scope of the present invention is not limited to these embodiments, and can be changed or modified in accordance with the purpose within the scope of the claims. It is.
For example, except for the above-described fourth embodiment, an offset wide-mouth receiving port (24) is provided at the upper end of the flexible tube (4) on the upstream side via a straight tube (35) connected to the flexible tube (4). The lower end of the offset joint body (21) of the offset joint (20) consisting of the formed offset joint body (21) and the offset short tubular member (22) rotatably fitted in the offset wide-mouth socket (24) A receiving port (23) is connected, and the vertical drain pipe (6) may be connected to the upper end receiving port (26) of the offset short tubular member (22) of the offset joint (20).
In that case, an offset joint in which a straight pipe (35) is connected to the upstream side of the flexible pipe (4), and an offset wide-mouth receiving port (24) is formed at the upper end on the upstream side of the straight pipe (35). The lower end receptacle (23) of the offset joint body (21) of the offset joint (20) comprising the main body (21) and the offset short cylindrical member (22) rotatably fitted in the offset wide mouth receptacle (24) ) And the vertical drain pipe (6) is connected to the upper end receiving port (26) of the offset short cylindrical member (22) of the offset joint (20).

In addition to the fifth embodiment, on the upstream side of the flexible pipe (4), the bent lower joint member (29) and the straight pipe (35) connected to the flexible pipe (4) are connected to the flexible pipe (4). The lower end of the bent lower joint member (29) of the bent offset joint (28) comprising the bent upper joint member (30) rotatably connected to the connection receiving port (32) of the bent lower joint member (29) A receiving port (31) is connected via a straight short pipe (27), and the vertical drain pipe (6) is connected to the upper end receiving port (34) of the bent upper joint member (30) of the bent offset joint (28). It may be connected.
In that case, the straight pipe (35) is connected to the upstream side of the flexible pipe (4), and the bent lower joint member (29) and the bent lower joint are connected to the upstream side of the straight pipe (35). The lower end receptacle (31) of the bent lower joint member (29) of the bent offset joint (28) comprising the bent upper joint member (30) rotatably connected to the connection receptacle (32) of the member (29) ) Through a straight short pipe (27), and the vertical drain pipe (6) is connected to the upper end receiving port (34) of the bent upper joint member (30) of the bent offset joint (28).

  INDUSTRIAL APPLICABILITY The present invention can be used industrially as a drainage pipe structure and a drainage pipe construction method that can greatly reduce the labor and cost required for drainage pipe construction work.

It is a description sectional side view of the drain piping structure of Example 1. FIG. It is a partial expanded explanation side sectional view of the drain piping structure of Example 1. It is a partial expanded explanation side sectional view of the drain piping structure of Example 2. It is a partial expanded explanation side sectional view of the drain piping structure of Example 3. It is a partial expanded explanation side sectional view of the drain piping structure of Example 4. It is a partial expanded explanation side sectional view of the drain piping structure of Example 5.

Explanation of symbols

1 Drainage piping structure
2 Underfloor foundation of the building
3 90 ° bent sheath tube
4 Flexible tube
6 Vertical drain pipe
7 Indoor drainage (flush toilet)
8 Drainage port
9 Outdoor drain pipe
19 Straight sheath
20 Offset fitting
21 Offset fitting body
22 Offset short tube fitting
23 Bottom edge
24 Offset wide opening
26 Top end socket
27 Straight short pipe
28 Bending offset fitting
29 Bending lower joint member
30 Bending upper joint member
31 Bottom edge
32 Connection socket
34 Upper end socket
35 Straight pipe

Claims (12)

  A 90 ° bendable sheath pipe is embedded in the foundation under the floor of the building, and a flexible pipe is inserted into the sheath pipe. A vertical drain pipe connected to the indoor drainage facility of the building is connected to the flexible pipe in the sheath pipe. A drainage pipe structure characterized by being connected to the upstream side and an outdoor drainage pipe connected to the downstream side of the flexible pipe.   The drainage pipe structure according to claim 1, wherein the drainage facility is a flush toilet with a drainage port located immediately above the vertical drainage pipe.   The 90 ° bent sheath pipe is buried in the deep part of the foundation under the floor of the building. A straight sheath pipe is connected to the upstream side of the sheath pipe, and a flexible pipe is inserted into the straight sheath pipe and the 90 ° bent sheath pipe. The drainage pipe structure according to claim 1 or claim 2, wherein   The 90 ° bent sheath pipe is buried in the deep part of the underfloor foundation of the building, a straight sheath pipe is connected to the upstream side of the sheath pipe, a flexible pipe is inserted into the 90 ° bent sheath pipe, and the straight sheath pipe The drainage pipe structure according to claim 1 or 2, wherein a straight pipe connected to the flexible pipe is inserted into the pipe.   On the upstream side of the flexible tube, there is provided an offset joint body of an offset joint comprising an offset joint body formed with an offset wide-mouth socket at the upper end and an offset short tube member rotatably fitted in the offset wide-mouth socket. The drain piping structure according to claim 1, wherein a lower end receiving port is connected, and the vertical drain pipe is connected to an upper end receiving port of the offset short cylindrical member of the offset joint.   On the upstream side of the flexible tube, a bent lower joint member of an offset joint comprising a bent lower joint member and a bent upper joint member rotatably connected to a connection receiving port of the bent lower joint member. The drain piping structure according to claim 1, wherein a lower end receiving port is connected via a straight short pipe, and the vertical drain pipe is connected to an upper end receiving port of a bent upper joint member of the offset joint.   A concrete foundation is built in a state where a 90 ° bent sheath tube is inserted into a predetermined portion of the building underfloor foundation construction part, and the underfloor foundation is constructed, and a flexible tube is inserted into the sheath tube. The drainage pipe structure according to claim 1, wherein a vertical drainage pipe connected to an indoor drainage facility is connected to the upstream side of the flexible pipe, and an outdoor drainage pipe is connected to the downstream side of the flexible pipe. Construction method of drainage piping structure.   The drainage pipe construction method according to claim 7, wherein the drainage facility is a flush toilet with a drainage port located immediately above the vertical drainage pipe.   The 90 ° bent sheath pipe is inserted in the deep part of the underfloor foundation construction part of the building, and further, the concrete is built with the straight sheath pipe connected to the upstream side of the 90 ° bent sheath pipe to construct the under floor foundation, A flexible pipe is inserted into the 90 ° bent sheath pipe and the straight sheath pipe, a vertical drain pipe connected to an indoor drainage facility is connected to the upstream side of the flexible pipe, and a downstream side of the flexible pipe is connected to the downstream side of the flexible pipe. The construction method of the drain piping structure which connects an outdoor drain pipe and constructs the drain piping structure of Claim 3.   The 90 ° bent sheath pipe is inserted in the deep part of the underfloor foundation construction part of the building, and further, the concrete is built with the straight sheath pipe connected to the upstream side of the 90 ° bent sheath pipe to construct the under floor foundation, A flexible pipe is inserted into the 90 ° bent sheath pipe, a straight pipe connected to the flexible pipe is inserted into the straight sheath pipe, and a vertical drain pipe communicating with an indoor drainage facility is provided upstream of the straight pipe. The construction method of the drain piping structure which connects and connects an outdoor drain pipe to the downstream of this flexible pipe, and constructs the drain piping structure of Claim 4.   The lower end of the offset joint body of the offset joint comprising an offset joint body formed with an offset wide-mouth socket at the upper end on the upstream side of the flexible tube and an offset short tubular member rotatably fitted in the offset wide-mouth socket The construction method of the drain piping structure according to claim 7 to 10, wherein a receiving port is connected and the vertical drain pipe is connected to an upper end receiving port of an offset short cylinder member of the offset joint.   The lower end of the bent lower joint member of the offset joint comprising the bent lower joint member and the bent upper joint member rotatably connected to the connection receiving port of the bent lower joint member on the upstream side of the flexible pipe The construction method of the drain piping structure according to claim 7, wherein the receiving port is connected via a straight short pipe, and the vertical drain pipe is connected to the upper end receiving port of the bent upper joint member of the offset joint.

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