JP2002115294A - Drain-forming method and drain apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drain-forming method which facilitates repairing of a drain. SOLUTION: According to the drain-forming method, a downstream end 23 of a bend pipe 21 is penetrated to a location below the ground surface S outside a house 12, and an upstream end 22 of the bend pipe 21 penetrates through the house 12, to form a foundation 13 of the house. Then, a flexible pipe 31 is inserted removably into the bend pipe 21. Further, a downstream end 32 of the flexible pipe 31 is connected to the drain, and an upstream end 34 of the flexible pipe 31 is connected to drainage facilities of the house 12. Thus, the flexible pipe 31 is rendered exchangeable, and the drainage facilities and drain of the house 12 can be repaired easily. Further, the downstream end 23 of the bend pipe 21 is not exposed to the ground surface, and therefore the drain of the house 12 can be formed with neat appearance. Furthermore, deterioration and damages of the bend pipe 21 and the flexible pipe 31 caused by ultraviolet irradiation and impact can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage channel forming method for connecting a drainage facility in a building to a drainage channel outside the building, and a drainage channel device.

[0002]

2. Description of the Related Art Conventionally, as a method of forming this kind of drainage channel, for example, a configuration shown in FIGS. 4 and 5 is known.

In the method of forming a drainage channel shown in FIGS. 4 and 5, in a state before the foundation 2 of the building 1 is formed, a portion where the drainage pipe 5 is buried in the foundation 2 After pipes are fixed to reinforcing bars (not shown), concrete is poured into a not-shown formwork, or a formwork is formed when forming a foundation, and at a place where the drain pipe 5 penetrates this formwork, The void pipe 6 made of paper is fixed and concrete is poured.

Then, after forming the foundation 2 of the building 1, each drainage device (not shown) of the building 1 is connected to the upstream end 3 of the drainage pipe 5, and the downstream end 4 of the drainage pipe 5 is buried under the ground surface. To a drainage channel such as a sewage basin (not shown).

[0005]

However, in the drainage channel forming method shown in FIGS. 4 and 5, the downstream end of the drainage pipe 5 penetrates from the foundation 2 of the building 1 to the ground surface G. Therefore, a part of the drain pipe 5 may be seen from outside the building 1. For this reason, a part of the drain pipe 5 protruding above the ground surface G at a position outside the building 1 is deteriorated due to irradiation of ultraviolet rays by sunlight or the like or an external impact.

When the drainage system of the building 1 is changed due to renovation or the like, the drainage pipe 5 penetrating the foundation 2 of the building 1 must be replaced or reused.
Since the drain pipe 5 penetrates through the foundation 2, it is difficult to change the drain pipe 5 without breaking it at all. For this reason, there is a problem that it is not easy to replace and reuse the drain pipe 5, and it is not easy to repair the drain channel for connecting each drain equipment to the drain channel.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a drainage channel forming method and a drainage channel device which can be easily repaired.

[0008]

According to a first aspect of the present invention, there is provided a method of forming a drainage channel, wherein a downstream end of a pipe is penetrated below the ground surface at a position outside a building, and an upstream end of the pipe is connected to the building. To form a foundation of the building by penetrating into the inside of the building, a small-diameter pipe smaller than the pipe is removably inserted into the pipe, and a downstream end of the small-diameter pipe is connected to a drainage channel. The drainage facility of the building is connected to the upstream end of the small diameter pipe.

In this configuration, the downstream end of the pipe is penetrated below the ground surface at an external position of the building, and the upstream end of the pipe is penetrated into the interior of the building to form the foundation of the building. . Next, a small-diameter pipe smaller in diameter than the pipe is inserted into this pipe so that it can be inserted and removed, and the downstream end of the small-diameter pipe is connected to a drainage channel. Connecting. As a result, even if the drainage system of the building is changed, the drainage system of the building can be connected to the drainage channel by exchanging the small-diameter pipe that is removably inserted into the pipe. Road repair becomes easier. Further, since the downstream end of the pipe is disposed below the ground surface, the pipe is not exposed on the ground surface at a position outside the building. For this reason, the drainage channel of the building can be formed with good visibility, and the deterioration and damage of the pipe and the small-diameter pipe due to the irradiation of ultraviolet rays by sunlight or the impact can be prevented.

According to a second aspect of the present invention, there is provided a drainage channel forming method according to the first aspect, wherein the pipe is curved so that a small-diameter pipe can be inserted and removed.

In this configuration, since the small-diameter pipe is a curved pipe that can be inserted and removed, the downstream end of this pipe is penetrated below the ground surface at a position outside the building, and the upstream end of the pipe is Through the building.

According to a third aspect of the present invention, in the method for forming a drainage channel according to the first aspect, the pipe is bent so that a small-diameter pipe can be inserted and removed.

In this configuration, the small-diameter pipe is bent so that it can be inserted and removed, so that the downstream end of the pipe penetrates below the ground surface at a position outside the building, and the upstream end of the pipe is Can easily penetrate into the building.

According to a fourth aspect of the present invention, there is provided a drainage channel forming method according to any one of the first to third aspects, wherein the small diameter pipe is a bendable pipe.

In this configuration, since the small-diameter tube is a bendable tube, the small-diameter tube can be easily inserted and removed even with a bent tube. In addition, since the upstream end of the small-diameter pipe penetrating from the upstream end of the pipe body can be bent, by bending the upstream end of the small-diameter pipe toward the drainage system of the building, the piping from the drainage system of the building can be more easily bent. It will be easier.

According to a fifth aspect of the present invention, there is provided the drainage channel forming method according to any one of the first to fourth aspects, wherein the upstream end of the pipe is closed at the upstream end of the pipe. Means are provided.

In this configuration, since the upstream blocking means is provided at the upstream end of the pipe, a liquid such as concrete used for forming the foundation of the building when forming the foundation of the building is used. Will not enter from the upstream end of the tube. As a result, work efficiency when forming the foundation of the building is improved.

According to a sixth aspect of the present invention, in the method of forming a drainage channel according to the fifth aspect, the upstream-side closing means upwardly moves an upstream end of the small-diameter pipe which is removably inserted into the pipe. And the upstream end of the small-diameter pipe that opens upward,
It is formed so as to be rotatable to the side and penetrates this small-diameter tube to close the upstream end of the tube.

In this configuration, the upstream end of the small-diameter tube that is removably inserted into the tube body is opened upward, and the upstream end of the small-diameter tube that opens upward can be rotated sideways. Form. Further, an upstream-side closing means is provided by penetrating this small-diameter pipe and closing the upstream end of the pipe body.
Therefore, with the upstream end of the pipe closed, the upstream end of the small-diameter pipe that can be inserted into and removed from the pipe can be rotated. Therefore, the working efficiency when forming the foundation of the building is good, and the piping work from each drainage facility of the building after forming the foundation to the upstream end of the small diameter pipe becomes easy.

According to a seventh aspect of the present invention, in the drainage channel forming method of the sixth aspect, the upstream closing means is integrated with a small-diameter pipe opened upward.

In this configuration, since the upstream closing means is provided integrally with the small-diameter pipe opened upward, a gap formed between the outer peripheral edge of the small-diameter pipe and the upstream closing means is eliminated. As a result, it is possible to efficiently prevent liquid such as concrete from entering the pipe when forming the foundation of the building.

According to a eighth aspect of the present invention, in the drainage channel forming method according to any one of the first to seventh aspects, the gap between the downstream end of the pipe through which the small diameter pipe is inserted and the small diameter pipe is closed. Is what you do.

In this configuration, the gap between the downstream end of the pipe through which the small diameter pipe is inserted and the small diameter pipe is closed, so that the gap between the downstream end of the pipe and the small diameter pipe is closed. In the case of forming the foundation of a building, it is possible to prevent the liquid such as concrete from penetrating between the pipe and the small-diameter pipe at the downstream end of the pipe and at the downstream end of the pipe with these pipes and the small-diameter pipe. Insects and earth and sand can be prevented from entering the gap with the pipe.

According to a ninth aspect of the present invention, the drainage device is penetrated from the inside of the building to below the outside ground surface of the building, and a bendable small-diameter pipe is inserted thereinto so as to be insertable and removable. Is provided with a curved tubular body that is inserted from the inside to below the outer ground surface.

In this configuration, a bendable small-diameter pipe is removably inserted into a curved pipe penetrated from the interior of the building to below the outer ground surface of the building. By inserting the pipe from the inside of the building to below the external ground surface, the small-diameter pipe can be easily replaced. Further, since this tube is not exposed to the ground, it is possible to prevent deterioration or damage of the tube due to irradiation of ultraviolet rays by sunlight or impact, or the like.

A drainage device according to a tenth aspect is a drainage device for connecting drainage equipment in a building to a drainage channel outside the building, wherein the drainage device inside the building is located outside the building at a position below the ground surface. And a small-diameter pipe which is inserted through the pipe so that it can be inserted and removed, and is smaller in diameter than the pipe and can be bent.

[0027] In this configuration, a curved pipe penetrating from the inside of the building to a position outside the building below the ground surface,
A small-diameter tube that is smaller in diameter and bendable than this tube is inserted so as to be insertable and removable. Next, a drainage facility of the building is connected to one end of the small-diameter pipe located inside the building, and the other end of the small-diameter pipe located outside the building is connected to a drainage channel outside the building. As a result, even if the drainage system of the building is changed, by replacing the small-diameter pipe that can be inserted and removed from the pipe,
Since the drainage system of the building can be connected to the drainage channel, it is easy to repair the drainage channel for connecting the drainage system of the building to the drainage channel. Further, since the pipe is penetrated below the ground surface, the pipe is not exposed on the ground surface at a position outside the building. For this reason, the drainage channel of the building can be formed with good visibility, and the deterioration and damage of the pipe and the small-diameter pipe due to the irradiation of ultraviolet rays by sunlight or the impact can be prevented.

The drainage device according to the eleventh aspect is the ninth aspect.
Or in the drainage device according to 10, the upstream end of the small-diameter pipe, which is removably inserted into the pipe body, is opened at the upstream end of the pipe body, and then the small-diameter pipe opened upward is opened. An upstream end is formed so that the upstream end is rotatable to the side, and an upstream closing means for closing the upstream end of the tubular body by penetrating the small diameter pipe is provided.

In this configuration, the upstream end of the small-diameter tube inserted removably into the tube is opened upward, and the upstream end of the small-diameter tube opened upward is formed so as to be rotatable sideways. Further, by providing an upstream closing means for penetrating this small diameter pipe to close the upstream end of the pipe at the upstream end of the pipe, it is used when forming the foundation of this building, such as concrete. The liquid does not enter from the upstream end of the tube, and the upstream end of the small-diameter tube removably inserted into the tube becomes rotatable with the upstream end of the tube closed. As a result, the working efficiency when forming the foundation of the building is improved, and the piping work from each drainage facility of the building after forming the foundation to the upstream end of the small diameter pipe becomes easy.

The drainage device according to the twelfth aspect is the ninth aspect.
12. The drainage channel device according to any one of claims 11 to 11, further comprising a closing means for closing a space between the downstream end of the pipe through which the small diameter pipe is inserted and the small diameter pipe.

In this configuration, the gap between the small-diameter pipe at the downstream end thereof and the small-diameter pipe at the downstream end of the small-diameter pipe is closed by closing the downstream end of the small-diameter pipe and the small-diameter pipe with the closing means. Therefore, when forming the foundation of a building, it is possible to prevent the liquid such as concrete from penetrating between the pipe at the downstream end of the pipe and the small-diameter pipe, and at the downstream end of the pipe to Insects, earth and sand, etc. can be prevented from entering the gap between the tube and the small diameter tube.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a drainage device according to the present invention will be described.
The configuration of this embodiment will be described with reference to FIG.

In FIG. 1, reference numeral 11 denotes a drainage channel device. The drainage channel device 11 is provided with a drainage device (not shown) in a house 12 as a building, not shown, buried in the residential land of the house 12 (not shown). Connect to drainage basin as drainage channel. Also,
Under the floor of the house 12, a substantially horizontal so-called solid foundation 14, which is a foundation 13 of the house 12, is formed. Also, standing up from the base slab of the solid foundation 14, a so-called cloth base 15, which is a base of the pillar of the house 12, is formed. These solid foundation 14 and cloth foundation 15 are cast with concrete.

Then, the drainage device 11 is disposed on the ground surface S at a position outside the cloth foundation 15 of the house 12 from above the solid foundation 14 of the house 12.
It has a bend tube 21 as a VU tube as a tube penetrating downward, that is, a bend tube 21. The bend pipe 21 has, for example, a nominal diameter of 75 mm and is formed of a vinyl chloride resin or the like into a substantially cylindrical shape whose axial direction is bent. Here, the center axis of the bend tube 21 is bent.

The upstream end 22 of the bend pipe 21 projects obliquely upward from the solid foundation 14, for example, at an angle of about 30 ° to 45 °, and projects upward from the solid foundation 14. Are formed along. As a result, this bend tube
The upstream end 22 of the opening 21 is elliptical. Here, the upper end surface 16 of the solid foundation 14 is located above the ground surface S. Further, the bend pipe 21 is embedded in the solid foundation 14 at an angle of about 30 ° to 45 °, and the downstream side of the bend pipe 21 is bent in the horizontal direction. The downstream end 23 of the bend pipe 21 penetrates the cloth foundation 15 and protrudes below the ground surface S, which is an external position of the house.

Further, inside the bend tube 21, a flexible tube 31 having a smooth inner surface as a bendable tube which is a small-diameter tube smaller in diameter than the bend tube 21 is removably inserted.
The flexible tube 31 bends or curves within the bend tube 21 when the flexible tube 31 is removably inserted into the bend tube 21.
The downstream end 32 of the flexible tube 31 is
And is connected to an inflow end of a not-shown drain pipe connected to an inflow port of a not-shown sewage basin.

At the upstream end 34 of the flexible tube 31,
A socket 35 as a substantially cylindrical connection body is fitted and fixed by bonding. The upstream end 36 of the socket 35 is fitted and fixed to a fitting portion 43 formed at a downstream end 42 of a first elbow 41 which is a pipe joint bent at, for example, 60 ° to 45 °. Further, a claw-shaped fitting portion 45 along the circumferential direction, which gradually increases in diameter toward the downstream side of the first elbow 41, is provided on the outer edge of the opening of the upstream end 44 of the first elbow 41. It is protruding.

The upstream end 44 of the first elbow 41
Is a second elbow which is an L-shaped joint bent at 90 °, for example.
O which is packing is inserted into the fitting receiving portion 53 formed at the downstream end 52 of
Watertight and rotatably fitted and connected via a ring 54. The fitting receiving portion 53 of the second elbow 51 is formed in a substantially cylindrical shape whose diameter is larger than that of the main body of the second elbow 51. An O-ring holding portion 55 which is a U-shaped packing holding portion extending in the circumferential direction is formed on the inner periphery of the insertion receiving portion 53. An O-ring 54 is fitted into the O-ring holding portion 55, and an upstream end 44 of the first elbow 41 is provided.
Connect watertight to.

Further, on the inner periphery of the second elbow 51 inside the O-ring holding portion 55, there is provided a substantially concave groove-shaped fitting recess 56 which can be fitted to the fitting portion 45 of the first elbow 41. The fitting recess 56 is formed in a key shape that gradually becomes deeper toward the downstream side of the second elbow 51, and is formed in a circle along the circumferential direction of the second elbow 51. It is formed in an annular shape. An expanded cylindrical insertion recess 58 is formed at the upstream end 57 of the second elbow 51. This fitting recess
At 58, a drain pipe from a drainage facility of the building is inserted and adhesively fixed.

At the upstream end 22 of the bend pipe 21, a lid 61 is mounted as upstream closing means for closing the upstream end 22 of the bend pipe 21. This lid 61 is a bend tube
The first elbow 41 is formed integrally with the outer periphery of the first elbow 41 and is formed in an elliptical shape having a diameter larger than the upstream end 22 of the first elbow 41. Also,
A cylindrical flange portion 62 is formed on the outer peripheral edge of the lid 61 so as to project toward the downstream end 42 of the first elbow 41 in the axial direction of the lid 61. The flange portion 62 covers the outer edge of the opening of the upstream end 22 of the bend pipe 21.

Next, a method of forming a drainage channel in the drainage channel device according to the first embodiment will be described.

First, the foundation 13 of the house 12, that is, the solid foundation
Before the casting of the base 14 and the cloth foundation 15, the bend is made so that the upstream end 22 projects from the upper end face 16 of the solid foundation 14, and the downstream end 23 projects below the ground surface S, which is an external position of the house 12. tube
21 is arranged.

Next, a flexible tube is attached to the bend tube 21.
After the insertion and removal of the socket 31, the downstream end 37 of the socket 35, which is fitted and bonded to the fitting portion 43 of the first elbow 41, is bonded and fixed to the upstream end 34 of the flexible tube 31. Elbow of
The upstream end 22 of the bend pipe 21 is closed by a lid 61 formed on the outer periphery of 41.

Further, the upstream end 44 of the first elbow 41
Then, the fitting receiving portion 53 of the second elbow 51 is rotatably fitted and connected. At this time, the fitting portion 45 of the first elbow 41 is slidably fitted into the fitting recess 56 of the second elbow 51. Then, the O-ring attached to the O-ring holding portion 55 of the second elbow 51
54 comes into contact with the outer peripheral surface of the first elbow 41 to make the connection between the first elbow 41 and the second elbow 51 watertight.

In this state, the solid foundation 14 and the cloth foundation 15 of the house 12 are cast.

Next, the downstream end 32 of the flexible tube 31 is
The drain pipe from the drainage facility of the house 12 is connected to the inflow end of the drain pipe connected to the inflow port of the sewage basin, and is fitted and fixed to the fitting recess 58 of the second elbow 51 by fitting.

As described above, according to the first embodiment, the downstream end 23 of the bend pipe 21 penetrates below the ground surface S at a position outside the house 12 and the upstream end of the bend pipe 21 twenty two
After the flexible pipe 31 is inserted into the bend pipe 21 so that the flexible pipe 31 can be inserted into and removed from the upper end face 16 of the solid foundation 14 of the house 12, the foundation 13 of the house 12 is cast. Thereafter, the downstream end 23 of the bend pipe 21 is connected to the inflow end of the sewage basin, and the drainage facility of the house 12 is connected to the upstream end 22 of the bend pipe 21.

As a result, the flexible pipe 31 can be pulled out from the bend pipe 21 even when the drainage facility of the house 12 is renovated or changed, and so the flexible pipe 31 is pulled out and replaced with a new flexible pipe 31. By replacement, the newly provided drainage equipment can be connected to the wastewater basin without damaging the bend pipe 21, and the drainage channel of the house 12 can be secured. Therefore, the drainage of the house 12 can be easily repaired.

Further, since the downstream end 23 of the bend pipe 21 penetrates below the ground surface S, the bend pipe 21 and the flexible pipe 31 are not exposed on the ground surface S at a position outside the house 12. As a result, it is possible to form the drainage channel of the house 12 visually, and to prevent the drainage channel from being deteriorated or damaged due to irradiation of ultraviolet rays by sunlight or impact.

Further, since the bendable flexible tube 31 is inserted into and removed from the bend tube 21 formed on the foundation 13 of the house 12, even if the bend tube 21 is curved or bent, the bend tube 21 is bent. The flexible pipe 31 can be easily inserted from the upstream end 22 to the downstream end 23 of the pipe 21, and the inserted flexible pipe 31 can be easily pulled out.

Further, the first elbow 41 is bonded and fixed to the upstream end 34 of the flexible tube 31 via the socket 35, so that the lid 61 and the flange 62 on the outer peripheral portion of the first elbow 41 are bent. The upstream end 22 of the pipe 21 is closed. As a result, it is possible to prevent the intrusion of the concrete liquid or the like from the upstream end 22 of the bend pipe 21 when the foundation 13 of the house 12 is cast. As a result, the flexible tube 31 can be easily pulled out of the bend tube 21 and the foundation 13 of the house 12 can be easily cast. Therefore, the work efficiency at the time of placing the foundation 13 of the house 12 can be improved.

Then, the first elbow is connected to the upstream end 22 of the flexible pipe 31 inserted through the bend pipe 21 through the socket 35.
After attaching the first elbow 41 and opening the upstream end 44 of the first elbow 41 upward, the second elbow 51 is rotatably and water-tightly connected to the upstream end 44 of the first elbow 41, The upstream end 57 of the second elbow 51 is opened to the side. further,
The lid 61 for closing the upstream end 22 of the bend pipe 21 is attached to the first elbow.
Since the upstream end 22 of the bend pipe 21 is closed by the lid 61, the first elbow 41 is formed integrally with the first elbow 41.
The second elbow 51 connected to the upstream end 44 of the second member is rotatable.

As a result, since the second elbow 51 can be rotated in accordance with the direction of the drainage system of the house 12, the connection of the flexible pipe 31 to the drainage system of the house 12 becomes easy, and Piping work can be made easier.

Further, by forming a lid 61 for closing the upstream end 22 of the bend pipe 21 integrally with the first elbow 41, a portion projecting from the upstream end 22 of the bend pipe 21, ie, the first elbow The gap formed between 41 and lid 61 is eliminated. As a result, when the foundation 13 of the house 12 is formed, it is possible to efficiently prevent the materials and the like when forming the foundation 13 of the house 12 from entering the bend pipe 21.

Next, the configuration of the second embodiment of the present invention will be described with reference to FIG.

The drainage device 11 shown in FIG. 2 is basically the same as the drainage device 1 shown in FIG.
The upstream end 34 of the flexible tube 31
The drainage system of the house 12 is directly connected via 35.

As a result, the drainage device 11 shown in FIG.
Is the upstream end of the flexible pipe 31 inserted through the bend pipe 21
Since the drainage system of the house 12 is formed by directly connecting the drainage system of the house 12 to the drainage device 34 via the socket 35, the same operation and effect as those of the drainage channel device shown in FIG. 1 can be obtained.

Further, if a floor band 81 is attached to the upstream side of the socket 35, the downstream end 32
Can be positioned and fixed more easily.

Next, the configuration of the third embodiment of the present invention will be described with reference to FIG.

The drainage channel device 11 shown in FIG. 3 is basically the same as the drainage channel device 11 shown in FIG. 2, except that the bend pipe 21 penetrating through the solid foundation 14 and the cloth foundation 15 of the house 12. The intermediate region in the axial direction is curved. Here, the center axis of the bend tube 21 is arcuate, that is, bent in an arc shape.

The upstream end 34 and the downstream end 32 of the flexible pipe 31 inserted into the bend pipe 21 have a drain pipe as a tubular body having the same diameter as the flexible pipe 31 at each of the upstream end 34 and the downstream end 32. Fitting receiving ports 87 and 88 are provided, respectively, which enable connection of 85 and 86 by internal fitting.

The downstream end 32 of the flexible pipe 31 and the downstream end 23 of the bend pipe 21 are located between the downstream end 32 of the flexible pipe 31 inserted into the bend pipe 21 and the downstream end 23 of the bend pipe 21. A packing 89 is attached as an annular closing means for closing the gap. Further, a short pipe 90 is internally fitted and fixed to the upstream end 34 of the flexible pipe 31 inserted through the bend pipe 21. Further, an elbow body 91 whose axial direction is curved by about 45 degrees is adhesively fixed to the upstream end of the short pipe 90 by internal fitting. And this elbow body
A drain pipe 85 is internally fitted to the upstream end of 91 and is adhesively fixed thereto.

Further, the upstream end of the drain pipe 85 is
In the vicinity of the downstream end of the drain pipe 85, a floor band 81 is attached and positioned and fixed on the solid foundation 14 of the house 12.

As a result, the drainage device 11 shown in FIG.
The flexible pipe 31 is inserted through the bend pipe 21 penetrating from the solid foundation 14 of the house 12 to the outside of the cloth foundation 15 of the house 12, and the upstream end 34 and the downstream end 32 of the flexible pipe 31 Since the drainage pipes 85 and 86 are formed by connecting the drainage pipes 85 and 86, the same operation and effect as the drainage channel device 11 shown in FIG. 2 can be obtained.

Further, since the bend tube 21 is bent, the bend tube 21 is bent as compared with the case where the bend tube 21 is bent.
The flexible tube 31 is inserted through the
The work of penetrating 31 from the solid foundation 14 of the house 12 to the cloth foundation 15 of the house 12 can be made easier.

Further, between the downstream end 32 of the flexible pipe 31 inserted into the bend pipe 21 and the downstream end 23 of the bend pipe 21,
The bend pipe 21 and the flexible pipe 21
The gap at the downstream end of 31 can be closed airtight and watertight.
For this reason, when forming the foundation 13 of the house 12, this house
The material for forming the foundation 13 of 12, for example, concrete milk or the like can be prevented from entering the gap between the bend pipe 21 and the flexible pipe 31 at the downstream end of the bend pipe 21 and the flexible pipe 31 at the downstream end thereof.
Insects, earth and sand, into the gap between the bend pipe 21 and the flexible pipe 31 at the downstream end of the
Intrusion of rainwater can be prevented.

In each of the above-described embodiments, the drainage facility of the house 12 can be connected to the upstream end 34 of the flexible pipe 31 that is removably inserted into the bend pipe 21 that penetrates the base 13 of the house 12. Any configuration may be used.

[0068]

According to the method of forming a drainage channel according to the first aspect, even when the drainage equipment of a building is changed, the small-diameter pipe removably inserted into the pipe body can be replaced.
Since the drainage system of the building can be connected to the drainage channel, the drainage channel of the building can be easily repaired.In addition, since the downstream end of the pipe is located below the ground surface, the pipe can be placed on the ground surface at a location outside the building. Since the body is not exposed, the drainage channel of the building can be easily formed, and the deterioration and damage of the tube and the small-diameter tube due to the irradiation of ultraviolet rays by sunlight or the impact can be prevented.

According to the drainage channel forming method of the second aspect, in addition to the effect of the drainage channel forming method of the first aspect, the small-diameter pipe is formed into a removably curved pipe. It is easier to penetrate the downstream end below the ground surface at an external location of the building and to penetrate the upstream end of the tube into the building.

According to the drainage channel forming method of the third aspect, in addition to the effect of the drainage channel forming method of the first aspect, the small-diameter pipe is bent so as to be insertable and removable. The downstream end can be easily penetrated below the ground surface at an external position of the building, and the upstream end of the pipe can be easily penetrated into the building.

According to the drainage channel forming method according to the fourth aspect, in addition to the effect of the drainage channel forming method according to any one of the first to third aspects, the small diameter pipe is made to be a bendable pipe. Since the small diameter pipe can be easily inserted and removed, and the upstream end of the small diameter pipe penetrating from the upstream end of the pipe body can be bent,
By bending the upstream end of the small-diameter pipe toward the drainage facility of the building, piping from the drainage facility of the building can be more easily performed.

According to the drainage channel forming method of the fifth aspect, in addition to the effect of the drainage channel forming method of any one of the first to fourth aspects, the upstream closing means is provided at the upstream end of the pipe. When forming the foundation of a building, it is possible to prevent the liquid such as concrete used in forming the foundation of the building from intruding into the upstream end of the pipe, thereby reducing the work efficiency in forming the foundation of the building. Can be improved.

According to the drainage channel forming method of the sixth aspect, in addition to the effect of the drainage channel forming method of the fifth aspect, the drainage channel can be inserted into and removed from the pipe while the upstream end of the pipe is closed. Because the upstream end of the small-diameter pipe inserted into the pipe can be rotated, the work efficiency when forming the foundation of the building can be improved, and piping work from each drainage system of the building after the foundation is formed to the upstream end of the small-diameter pipe can be performed. Easy.

According to the drainage channel forming method of the seventh aspect, in addition to the effect of the drainage channel forming method of the sixth aspect, the upstream closing means is provided integrally with the small-diameter pipe opened upward. Since there is no gap between the outer peripheral edge of the small-diameter pipe and the upstream closing means, it is possible to efficiently prevent liquid such as concrete from entering the pipe when forming the foundation of the building.

According to the drainage channel forming method of the eighth aspect, in addition to the effect of the drainage channel forming method of any one of the first to seventh aspects, the downstream end of the pipe body through which the small diameter pipe is inserted and the small diameter pipe Can close the gap with the small-diameter pipe at the downstream end of this pipe, so that when forming the foundation of a building, this pipe at the downstream end of the pipe for liquids, such as concrete, Invasion between the small-diameter pipe and the small-diameter pipe can be prevented, and insects, earth and sand, and the like can be prevented from entering the gap between the small-diameter pipe and the pipe at the downstream end of the pipe.

According to the drainage device of the ninth aspect, a bendable small-diameter pipe is removably inserted into a curved pipe penetrated from the inside of the building to below the external ground surface. If a small-diameter pipe is inserted from inside the building to below the external ground surface,
The small-diameter tube can be easily replaced, and since this tube is not exposed to the ground, deterioration or damage of the tube due to irradiation of ultraviolet rays by sunlight or an impact can be prevented.

According to the drainage device of the tenth aspect, even when the drainage equipment of the building is changed, the small-diameter pipe inserted through the curved pipe so as to be able to be inserted and removed can be replaced. Since the drainage system can be connected to the drainage channel, it is easy to repair the drainage channel of the building, and since the pipe penetrated below the ground surface, the pipe is not exposed on the ground surface outside the building. In addition, it is possible to form the drainage channel of the building with good visibility, and to prevent deterioration and damage of the pipe and the small-diameter pipe due to irradiation of ultraviolet rays by sunlight or impact.

According to the drainage device according to the eleventh aspect, in addition to the effect of the drainage device according to the ninth or tenth aspect, the upstream end of the small-diameter pipe that is removably inserted into the pipe is opened upward. , Forming this upstream end to be rotatable to the side,
When the upstream end of the pipe is provided with the upstream closing means for penetrating the small diameter pipe and closing the upstream end of the pipe, when forming the foundation of the building, when forming the foundation of the building, It is possible to prevent the use of, for example, liquid such as concrete, etc. from entering the upstream end of the pipe, and to rotate the upstream end of the small-diameter pipe that is removably inserted into the pipe while the upstream end of the pipe is closed. Therefore, the working efficiency when forming the foundation of the building can be improved, and the piping work from each drainage facility of the building after forming the foundation to the upstream end of the small diameter pipe can be facilitated.

According to the drainage device of the twelfth aspect, in addition to the effect of the drainage device of any of the ninth to eleventh aspects, in addition to the effect of the drainage device of the ninth to eleventh aspects, the distance between the downstream end of the pipe through which the small diameter pipe is inserted and the small diameter pipe The gap between the small-diameter pipe at the downstream end of the pipe and the small-diameter pipe at the downstream end of the pipe can be closed by the closing means. It is possible to prevent intrusion into the space between the pipes and to prevent insects and earth and sand from entering into the gap between the pipes and the small diameter pipe at the downstream end of the pipes.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a method for forming a drainage channel according to the present invention.

FIG. 2 is a sectional view showing a second embodiment of the present invention.

FIG. 3 is a sectional view showing a third embodiment of the present invention.

FIG. 4 is a cross-sectional view illustrating a conventional method of forming a drainage channel.

FIG. 5 is a cross-sectional view showing another conventional drainage channel forming method.

[Explanation of symbols]

 11 Drainage device 12 House as a building 13 Foundation of the house 12 21 Bend pipe as a pipe 22 Upstream end of the bend pipe 21 Downstream end of the bend pipe 21 Flexible pipe that is a bendable pipe as a small diameter pipe 32 Flexible pipe Downstream end of 31 34 Upstream end of flexible tube 31 61 Lid as upstream closing means 89 Packing as closing means S Ground surface

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tatsuyuki Iwasaki 1-18-3 Toganecho, Katsushika-ku, Tokyo Udan o No. 3 building F term (reference) 2D061 AA05 AB07 AB10 2D063 BA01 BA15

Claims (12)

[Claims] 1. The pipe has a downstream end penetrating below the ground surface at a location external to the building, and an upstream end of the pipe penetrating into the interior of the building to form a foundation for the building. A small-diameter pipe smaller than the pipe is removably inserted into the pipe, and the downstream end of the small-diameter pipe is connected to a drainage channel, and the drainage facility of the building is connected to the upstream end of the small-diameter pipe. A method for forming a drainage channel, comprising: 2. The method for forming a drainage channel according to claim 1, wherein the pipe is curved so that a small-diameter pipe can be inserted and removed. 3. The method according to claim 1, wherein the pipe has a small-diameter pipe bent so that it can be inserted and removed. 4. The method according to claim 1, wherein the small-diameter pipe is a bendable pipe. 5. The method for forming a drainage channel according to claim 1, wherein an upstream closing means for closing an upstream end of the pipe is provided at an upstream end of the pipe. 6. The upstream closing means opens upward the upstream end of the small diameter pipe inserted removably into the pipe, and rotates the upstream end of the small diameter pipe opened upward to the side. The method for forming a drainage channel according to claim 5, wherein the upstream end of the pipe is closed by penetrating the small-diameter pipe. 7. The method according to claim 6, wherein the upstream blocking means is integrated with a small-diameter pipe that opens upward. 8. The method for forming a drainage channel according to claim 1, wherein a gap between the downstream end of the pipe body through which the small diameter pipe is inserted and the small diameter pipe is closed. 9. A small diameter pipe which is penetrated from the inside of the building to below the outside ground surface of the building, and which is bendable is inserted thereinto so as to be insertable and removable, and moves the small diameter pipe from the inside of the building to below the outside ground surface. A drain pipe device having a curved pipe body through which the pipe is inserted. 10. A drainage device for connecting a drainage system in a building to a drainage channel outside the building, wherein the pipe is a curved pipe penetrating from inside the building to a position outside the building below the ground surface. And a small-diameter pipe capable of being inserted into and removed from the pipe, and having a smaller diameter than the pipe and capable of being bent. 11. An upstream end of the small-diameter pipe, which is removably inserted into the pipe, is opened upward at the upstream end of the pipe, and the upstream end of the small-diameter pipe opened upward is connected to the upstream end. The drainage channel device according to claim 9 or 10, further comprising an upstream closing means formed so as to be rotatable in a direction to penetrate the small diameter pipe and close an upstream end of the pipe body. 12. The drainage device according to claim 9, further comprising a closing means for closing a space between the downstream end of the pipe through which the small diameter pipe is inserted and the small diameter pipe.