JPH09242171A - Connecting structure of outdoor drain pipe and drainage basin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the easy damage in the connecting sections of an outdoor drain pipe and a drainage basin by an earthquake. SOLUTION: In the connecting structure of an outdoor drain pipe 3 connected to a building equipment drain pipe and piped into an outdoor ground and a drainage basin 4 buried into the ground, a socket 411 is formed to the side wall of the drainage basin 4, and the outdoor drain pipe 3 is bonded under the state, in which the drain pipe 3 is inserted into the socket 411. The inside diameter of the socket 411 is formed in 1.4 times or more of the outside diameter of the outdoor drain pipe 3 at that time, an elastic cylindrical body 8 capable of holding the outdoor drain pipe 3 at the center of the socket 411 and having elasticity is interposed in approximately overall length between the socket 411 and the outdoor drain pipe 3, and the opening end of the socket 411 has an inserting hole 92, into which the outdoor drain pipe 3 is inserted, and is sealed by an elastic cap 9 following the movement of the outdoor drain pipe 3 and capable of being elastically deformed.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a connection structure between a drainage basin and a drainage pipe that are buried in the ground.

[0002]

2. Description of the Related Art When an earthquake occurs, the vibration of a building or the distortion of the ground causes a displacement in a positional relationship between a drainage pipe for building equipment piped in the building and a drainage pit buried underground. Is revealed. By the way, as shown in FIG. 10, the resin building drainage pipe 10 and the resin drainage basin 20 are generally connected via a resin outdoor drainage pipe 30. One end is fixed to the building equipment drain pipe 10 with an adhesive, and the other end of the outdoor drain pipe 30 is fixed to a receiving port 201 provided in the drainage pipe 20 with an adhesive.

[0003]

However, in the above-mentioned conventional technology, the building equipment drain pipe 10 and the outdoor drain pipe 30 are not provided.
At the connection portion with the outdoor drainage pipe 30 and the connection portion with the receiving port 201 of the drainage basin 20, the displacement of the positional relationship between the building equipment drainage pipe 10 and the drainage basin 20 cannot be absorbed at all. When it occurs, there is a problem that shear stress, indentation and withdrawal stress act on the outdoor drainage pipe 30, and damage is likely to occur particularly at the connection portion.

[0004] Incidentally, as described in Japanese Utility Model Publication No. 4-12144, the receptacle of the drainage basin is a rubber ring receptacle having a rubber ring mounted on the inner periphery thereof, and an outdoor drainage pipe is provided in the rubber ring receptacle. Connection structures that are simply inserted are also known. In this conventional technology, since the outdoor drainage pipe is movable in the axial direction, although it is slightly stronger than the above-mentioned conventional technology against earthquakes, the axial movement of the outdoor drainage pipe is provided at the back of the receiving port. It is limited to the range where it comes into contact with the existing step, and it is almost impossible to move the outdoor drainage pipe in the radial direction (the cross-sectional shape of the rubber ring is made small and the inner peripheral surface of the receiving port is Since the gap for the rubber ring is provided to prevent the gap between the receiving port and the outdoor drainage pipe as much as possible), it cannot be said that sufficient earthquake countermeasures have been taken.

Therefore, in the present invention, attention is paid to the above problems, and the connection between the outdoor drainage pipe and the drainage drainage pipe can be prevented from easily damaging the connection between the outdoor drainage pipe and the drainage drain due to an earthquake. It is intended to provide a structure.

[0006]

In order to achieve the above object, in the connection structure of an outdoor drainage pipe and a drainage basin according to claim 1 of the present invention, a pipe is connected to a building facility drainage pipe and piped outdoors in the ground. It is a connection structure between the outdoor drainage pipe that is installed and the drainage basin buried in the ground, with the receiving port provided on the side wall of the drainage tub and the end of the outdoor drainage pipe being inserted into the receiving port. In the connected connection structure, the inner diameter of the receiving port is 1.4 times or more of the outer diameter of the outdoor drainage pipe,
Between the receiving port and the outdoor drainage pipe, an elastic cylindrical body having elasticity capable of holding the outdoor drainage pipe at the center of the receiving port is interposed, and the open end of the receiving port inserts the outdoor drainage pipe. The connection structure of the outdoor drainage pipe and the drainage basin according to claim 2 of the present invention is configured so as to have an insertion hole for allowing the outdoor drainage pipe to move and follow the movement of the outdoor drainage pipe so as to be closed by an elastic cap that is elastically deformable. In the connection structure of the outdoor drainage pipe and the drainage basin according to claim 3 of the present invention, a plurality of ribs are provided on the outer peripheral portion of the elastic tubular body. The ribs are circumferentially provided, and the tips of these ribs are in close contact with the inner peripheral surface of the receiving port.

[0007]

In the connection structure of the outdoor drainage pipe and the drainage basin according to claim 1 of the present invention, when the positional relationship between the building equipment drainage pipe and the drainage basin is displaced in the axial direction of the outdoor drainage pipe due to an earthquake or the like, The outdoor drainage pipe slides in the tubular elastic body in the axial direction, so that the displacement of the building equipment drainage pipe and the displacement of the drainage pipe are absorbed, and the pushing and pulling stress acting on the outdoor drainage pipe is relieved. In addition, the axial movement of the outdoor drainage pipe is caused by the fact that due to the difference between the inner diameter of the receiving outlet and the outer diameter of the outdoor drainage pipe, a sufficient distance is provided between the inner circumference of the receiving outlet and the outer circumference of the outdoor drainage pipe. Even if a step is provided at the back of the receiving port, it is not restricted by the step, and it is possible in a wider range than before.

Further, when the positional relationship between the building equipment drainage pipe and the drainage basin is displaced in a direction orthogonal to the axis of the outdoor drainage pipe due to an earthquake or the like, the outdoor drainage pipe is moved in a direction orthogonal to the axis within the receptacle of the drainage basin. The movement absorbs the displacement of the drainage pipe and drainage pipe of the building equipment, and alleviates the shear stress acting on the outdoor drainage pipe. When the outdoor drainage pipe moves in the direction orthogonal to the axis, the elastic tubular body interposed between the receiving port and the outdoor drainage pipe is elastically deformed, which causes a space between the elastic tubular body and the receiving port, or Even if there is a gap between the elastic tubular body and the outdoor drainage pipe, the elastic cap elastically deforms following the movement of the outdoor drainage pipe to maintain the closed state of the opening end of the receiving mouth, No water leaks.

In the connection structure of the outdoor drainage pipe and the drainage pipe according to the second aspect of the present invention, since the elastic tubular body is provided over substantially the entire length of the receiving port, the wastewater is provided between the receiving port and the outdoor drainage pipe. There is no gap for catching filth when the water flows backwards.

In the connecting structure for the outdoor drainage pipe and the drainage basin according to claim 3 of the present invention, a plurality of ribs are provided around the outer peripheral portion of the elastic tubular body, and the tips of these ribs are in close contact with the inner peripheral surface of the receiving port. Therefore, when the outdoor drainage pipe is held at the center of the receiving port, high water shutoff can be secured between the inner peripheral surface of the receiving port and the elastic tubular body. When the positional relationship between the building equipment drainage pipe and the drainage basin is displaced in a direction orthogonal to, the ribs positively elastically deform so that the movement of the outdoor drainage pipe is not hindered.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, based on FIGS.
The connection structure between the outdoor drainage pipe and the drainage pipe of the first embodiment will be described in detail. FIG. 1 is a diagram showing a part of a drainage path adopting the connection structure of an outdoor drainage pipe and a drainage basin of Embodiment 1, FIG.
1 is a vertical cross-sectional view showing the connection structure between the outdoor drainage pipe and the drainage basin of Embodiment 1, and FIG. 3 is an enlarged view of a main part III of FIG.
Is the foundation of the building, 2 is the drainage pipe for building equipment, 3 is the outdoor drainage pipe,
3a is a site drainage pipe and 4 is a drainage basin.

The outdoor drainage pipe 3 is laid underground through the foundation 1 of the building, one end of which is connected to the building equipment drainage pipe 2 via an elbow 6 and the other end of which is connected to the drainage tub 4. It is connected.

As shown in FIGS. 1 and 2, the drainage basin 4 includes an invert 41 made of vinyl chloride resin, an additional ring 42 made of vinyl chloride resin, a lid 43 made of cast iron,
And the lid 43 is buried at a depth substantially coinciding with the ground surface.

The invert 41 has a receiving port 411 into which one end of the outdoor drain pipe 3 is inserted, and a site drain pipe 3a.
412 inserted into one end of the
2 has an upper surface opening 413 into which the lower end is inserted, and the receiving port 411 and the receiving port 412 are formed at positions substantially opposed to each other. Also, the upper surface opening 413
Like the receiving port 411, is formed to have a slightly enlarged diameter, a groove 414 is formed on the inner peripheral surface thereof, and a rubber ring 415 is mounted in the groove 414. Further, a groove 416 for mounting a rubber ring is provided on the inner peripheral surface of the receiving port 411.

The drainage basin 4 uses an existing drainage basin as it is. However, in the first embodiment, a receiving port 411 of the invert 41 is required for the nominal diameter of the outdoor drainage pipe 3.
Is larger by two or more sizes than the receiving port 411.
The point that the elastic tubular body 8 is interposed between the outer cap and the outdoor drain pipe 3 and the opening end of the receiving port 411 are the elastic cap 9.
It is characterized in that it is sealed by and the elastic cap 9 is covered with the cover 7.

The first feature will be described in more detail. The currently used outdoor drain pipe 3 has a nominal diameter of 75 mm.
In the case of using an outdoor drainage pipe 3 having a nominal diameter of 75 mm, the invert 41 uses a receptacle having a nominal diameter of 150 mm or 200 mm and a nominal diameter of 100 mm.
When the outdoor drain pipe 3 is used, the invert 41 has a receiving port 411 having a nominal diameter of 200 mm. And
An outdoor drainage pipe 3 with a nominal diameter of 75 mm and a receiving port 41 with a nominal diameter of 150 mm
1 and a gap of about 38 mm is formed over the entire circumference between the receptacle 411 and the outdoor drain pipe 3, and the outdoor drain pipe 3 having a nominal diameter of 75 mm is inserted into the center of the receptacle 411 having a nominal diameter of 200 mm. A gap of about 64 mm is formed between the receiving port 411 and the outdoor drain pipe 3 over the entire circumference, and the nominal diameter is 10 mm.
When the 0 mm outdoor drain pipe 3 is inserted into the center of the receptacle 411 having a nominal diameter of 200 mm, a gap of about 51 mm is formed between the receptacle 411 and the outdoor drain pipe 3 over the entire circumference. As described above, the nominal diameter of the outlet 411 of the invert 41 is desirably larger than the nominal diameter of the outdoor drain pipe 3 by at least two sizes. The one having a difference of one size may be used (for example, even if the outdoor drainage pipe 3 having a nominal diameter of 100 mm is inserted into the center of the receptacle 411 having a nominal diameter of 150 mm, the entire circumference between the receptacle 411 and the outdoor drainage pipe 3 may be changed. About 26mm over
Is formed). In short, as described in the claims, the inner diameter of the receiving port 411 may be 1.4 times or more the outer diameter of the outdoor drain pipe 3.

The elastic tubular body 8 is formed of rubber having elasticity capable of holding the outdoor drainage pipe 3 at the center of the receiving port 411. As shown in FIG. 3, a plurality of tapered ribs 81 are formed. Are provided around the outer peripheral portion, and the tips of these ribs 81 are in close contact with the inner peripheral surface of the receiving opening 411, so that high water shutoff is secured between the inner peripheral surface of the receiving opening 411 and the elastic tubular body 8. Has been done. Of the plurality of ribs 81, the rib 81a facing the groove 416 of the receiving port 411 is formed larger than the other ribs 81 so that the tip end thereof engages with the groove 416. As a result, the elastic tubular body 8 is prevented from falling out of the receiving port 411 or falling to the bottom of the invert 41 as the outdoor drain pipe 3 moves in the axial direction. Further, this elastic tubular body 8 is
It is provided over almost the entire length of 11 to prevent a gap between the receiving port 411 and the outdoor drainage pipe 3 from catching filth in wastewater. Further, a protrusion 80 continuous in the circumferential direction is formed at each of the positions on the inner peripheral surface of the elastic tubular body 8 that overlap the rib 81, and the outdoor drainage pipe 3
A high waterproofness is ensured between the elastic tubular body 8 and the elastic tubular body 8.

The elastic cap 9 is connected to the outdoor drain pipe 3.
Is formed of rubber which can be elastically deformed following the movement of
And an insertion hole 92 for inserting the outdoor drain pipe 3 is provided at the center. This insertion hole 92 is
The peripheral portion is raised, and the close contact with the outdoor drain pipe 35 is sufficiently ensured. The elastic cap 9 and the outdoor drain pipe 3 are not fixed, and the outdoor drain pipe 3 can slide in the insertion hole 92 of the elastic cap 9 in the axial direction.

The cover 7 is made of vinyl chloride resin and has an outer diameter larger than that of the elastic cap 9. The elastic cap 9 is inserted into the hole 71 provided at the center with the outdoor drain pipe 3 inserted therein. Is provided on the outside. Thereby, it is possible to prevent the elastic cap 9 from being distorted by the earth pressure. Note that the cover 7 and the elastic cap 9 are not bonded, and the cover 7 does not prevent the elastic deformation of the elastic cap 9.

The procedure for connecting the outdoor drainage pipe 3 to the receiving port 411 of the drainage basin 4 is as follows.
After mounting the elastic tubular body 8, the elastic cap 9 and the cover 7 on the outside of the outdoor drainage pipe 3, the outdoor drainage pipe 3 is provided with the receiving port 4
Alternatively, the outdoor drainage pipe 3 may be inserted into the center of the elastic tubular body 8 and the elastic cap 9 after the elastic tubular body 8, the elastic cap 9 and the cover 7 are attached to the receiving port 411. You may do it.

The case where an earthquake occurs will be described below. First, when the positional relationship between the building equipment drainage pipe 2 and the drainage basin 4 is displaced in the axial direction of the outdoor drainage pipe 3 due to an earthquake or the like, the outdoor drainage pipe 3 slides in the axial direction inside the elastic tubular body 8. By moving, the displacement of the building equipment drainage pipe 2 and the drainage basin 4 is absorbed, and the pushing and pulling stress acting on the outdoor drainage pipe 3 is relieved. Further, the axial movement of the outdoor drainage pipe 3 is provided behind the receiving port 411 because the nominal diameter of the receiving port 411 of the invert 41 is larger than the nominal diameter of the outdoor draining pipe 3 by two sizes or more. It is not restricted by the step, and it is possible in a wider range than before.

On the other hand, when the positional relationship between the building equipment drainage pipe 2 and the drainage basin 4 is displaced in a direction orthogonal to the axis of the outdoor drainage pipe 3 due to an earthquake or the like, the outdoor drainage pipe 3 causes the drainage basin 4 to receive the drainage port 4.
By moving in the direction orthogonal to the axis in 11, the displacement of the building equipment drainage pipe 2 and the drainage basin 4 is absorbed, and the shear stress acting on the outdoor drainage pipe 3 is relaxed. When the outdoor drainage pipe 3 moves in the direction orthogonal to the axis, the elastic tubular body 8 interposed between the receiving port 411 and the outdoor drainage pipe 3 elastically deforms, and as a result, as shown in FIG. Even if there is a gap between the elastic tubular body 8 and the receiving port 411 (or between the elastic tubular body 8 and the outdoor drainage pipe 3), the elastic cap 9 is moved by following the movement of the outdoor drainage pipe 3. By elastically deforming, the closed state of the open end of the receiving port 411 is maintained, and the receiving port 411 is closed.
No water leaks from it. Further, when the elasticity of the elastic tubular body 8 is high, the outdoor drainage pipe 3 is difficult to move in the direction orthogonal to the axis, but is actively elastically deformed by the rib 81 provided on the outer peripheral portion of the elastic tubular body 8. By doing so, the movement of the outdoor drainage pipe 3 is not hindered.

That is, in the connection structure of the first embodiment, while using the existing drainage basin 4, the connection between the outdoor drainage pipe 3 and the drainage basin 4 connects the building equipment drainage pipe 2 and the drainage basin 4 to each other. Since the displacement of the positional relationship can be absorbed, the connection portion between the outdoor drainage pipe 3 and the drainage basin 4 can be easily and inexpensively provided with a high seismic isolation function.

Next, the connection structure between the outdoor drainage pipe and the drainage pipe according to the second embodiment will be described with reference to FIG. In the connection structure according to the second embodiment, since the elastic tubular body 8A is formed in a bellows shape, the outdoor drainage pipe 3 has the receiving port 411.
Of water between the outer peripheral surface of the outdoor drainage pipe 3 and the inner peripheral surface of the elastic cylindrical body 8A when being held at the center of the water, and the inner peripheral surface of the receiving port 411 and the outer peripheral surface of the elastic cylindrical body 8A. A high water-stopping property between and is secured. The other configuration and operation are the same as those in the first embodiment, and a description thereof will not be repeated.

Next, the connection structure between the outdoor drainage pipe and the drainage pipe according to the third embodiment will be described with reference to FIG. In the connection structure according to the third embodiment, since the elastic tubular body 8B is formed in the hollow cross-sectional shape, even if a part of the elastic tubular body 8B is compressed and deformed, the air in the hollow portion 82 moves. The other part of the elastic tubular body 8B is designed to swell. In other words, even if the outdoor drainage pipe 3 moves in the radial direction within the receiving port 411 of the drainage basin 4, the elastic tubular body 8B and the receiving port 411 are removed.
Since a gap is unlikely to occur between the elastic cylindrical body 8B and the outdoor drainage pipe 3, it is difficult for dirt to be caught or water leakage to occur. Further, since the plurality of ribs 83 are provided in the hollow portion 82 of the elastic tubular body 8B in the radial direction,
The strength for holding the outdoor drainage pipe 3 in the center of the receiving port 411 is not impaired. Further, a ridge 87 continuous in the circumferential direction is formed at each position on the inner peripheral surface of the elastic tubular body 8B that overlaps with the rib 83, and the drainage tub 4 is provided on the outer peripheral surface of the elastic tubular body 8B. A ridge 85 that engages with the groove 416 of the receiving port 411 is formed. The other configuration and operation are the same as those in the first embodiment, and a description thereof will not be repeated.

Next, the connection structure between the outdoor drainage pipe and the drainage pipe according to the fourth embodiment will be described with reference to FIG. In the connection structure of the fourth embodiment, the elastic cap 9A is formed in a bellows shape so as to easily follow the movement of the outdoor drainage pipe 3. Therefore, it does not come off from the receiving port 411 of the drainage basin 4 with the movement of the outdoor drainage pipe 3 or impair the adhesion to the outdoor drainage pipe 3. The other configuration and operation are the same as those in the first embodiment, and a description thereof will not be repeated.

Next, the connection structure of the outdoor drainage pipe and the drainage basin according to the fifth embodiment will be described with reference to FIG. In the connection structure of the fifth embodiment, the outer peripheral portion of the elastic tubular body 8C is
A plurality of ribs 86, 86a having a uniform thickness are formed from the base end to the tip, and the tips of these ribs 86, 86a are in close contact with the inner peripheral surface of the receiving port 411. A ridge 87 continuous in the circumferential direction is formed at each position on the inner peripheral surface of the elastic tubular body 8C that overlaps with the ribs 86 and 86a. The other configuration and operation are the same as those in the first embodiment, and a description thereof will not be repeated.

Next, the connection structure between the outdoor drainage pipe and the drainage pipe of the sixth embodiment will be described with reference to FIG. In the connection structure of the sixth embodiment, a plurality of ribs 88 are provided on the inner peripheral portion of the elastic tubular body 8D, and the tips of these ribs 88 are in close contact with the outer peripheral surface of the outdoor drainage pipe 3. A projection 89 is formed on the outer peripheral surface of the elastic cylindrical body 8D so as to engage with the groove 416 of the receiving port 411 of the drainage basin 4. In addition,
Other configurations and operations are the same as those in the first embodiment, and therefore the description thereof will be omitted.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like without departing from the gist of the present invention. Even if it exists, it is included in the present invention. For example,
In the embodiment, the example in which the drainage basin 4 is configured by the invert 41, the extension ring 42, and the lid 43 is shown, but the drainage basin 4 may be configured by only the invert 41 and the lid 43. Further, in the embodiment, the drainage basin 4 (the drainage basin in which the receiving port 411 and the outlet 412 face each other) used in the straight portion of the pipe is shown, but the drainage basin 4 (the receiving port in the bent portion of the pipe 411 and the outlet 412 are, for example, 9
It is applied to the connection structure between the drainage basin that differs by 0 degrees) and the outdoor drainage pipe 3, or the connection structure between the drainage basin 4 (the drainage basin having a plurality of outlets 412) used in the merging portion and the outdoor drainage pipe 3. Good. Furthermore, a band made of stainless steel or the like may be wound around the overlapping portion 91 provided on the outer periphery of the elastic cap 9 to increase the fixing strength of the elastic cap 9 to the receiving port 411.

[0030]

As described above, according to the first aspect of the present invention,
In the connection structure between the outdoor drainage pipe and the drainage basin, the displacement of the positional relationship between the building equipment drainage pipe and the drainage basin is absorbed by the connection between the outdoor drainage pipe and the drainage basin while using the existing drainage basin. Therefore, it is possible to obtain the effect that the connection portion between the outdoor drainage pipe and the drainage basin can be easily and inexpensively provided with a high seismic isolation function. Further, in the connection structure of the outdoor drainage pipe and the drainage basin according to claim 2 of the present invention, since the elastic tubular body is provided over substantially the entire length of the receiving port, even if the sewage flows backward, the receiving port and the outdoor It is possible to obtain an effect that dirt can be prevented from being caught between the drain pipe and the drain pipe. Further, in the connecting structure for the outdoor drainage pipe and the drainage basin according to claim 3 of the present invention, a plurality of ribs are provided around the outer peripheral portion of the elastic tubular body, and the tips of these ribs serve as receiving ports. Since it is in close contact with the inner peripheral surface, when the outdoor drainage pipe is held in the center of the receiving port, it is possible to secure high water shutoff between the inner peripheral surface of the receiving port and the elastic tubular body, and thus the outdoor drainage When the positional relationship between the building equipment drainage pipe and the drainage basin is displaced in the radial direction of the pipe, the effect that the outdoor drainage pipe can be sufficiently moved is obtained.

[Brief description of drawings]

FIG. 1 is a diagram showing a part of a drainage path adopting a connection structure of an outdoor drainage pipe and a drainage basin according to a first embodiment.

FIG. 2 is a vertical cross-sectional view showing the connection structure between the outdoor drainage pipe and the drainage pipe according to the first embodiment.

FIG. 3 is an enlarged view of a main part III of FIG.

FIG. 4 is a cross-sectional view showing a state of a main part III when an earthquake occurs.

FIG. 5 is a sectional view showing a connection structure between an outdoor drainage pipe and a drainage basin according to a second embodiment.

FIG. 6 is a sectional view showing a connection structure between an outdoor drainage pipe and a drainage basin according to a third embodiment.

FIG. 7 is a cross-sectional view showing a connection structure between an outdoor drainage pipe and a drainage pipe according to a fourth embodiment.

FIG. 8 is a sectional view showing a connection structure between an outdoor drainage pipe and a drainage pipe according to a fifth embodiment.

FIG. 9 is a cross-sectional view showing a connection structure between an outdoor drainage pipe and a drainage pipe according to a sixth embodiment.

FIG. 10 is a view showing a part of a drainage path adopting a conventional connection structure of an outdoor drainage pipe and a drainage basin.

[Explanation of symbols]

 2 Building equipment drainage pipe 3 Outdoor drainage pipe 4 Drainage pipe 411 Receiving port 8 Elastic cylindrical body 9 Elastic cap 92 Insert hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Takahashi 63 Aoyagi, Sayama-shi, Saitama 6-303 Shin-Sayama Heights (72) Inventor Yamada Yonezoku 3-15-1 Negishidai, Asaka-shi, Saitama Sekisui Chemical Co., Ltd. In-house (72) Inventor Ryoichi Isayama 3-15-1, Negishidai, Asaka-shi, Saitama Sekisui Chemical Co., Ltd.

Claims (3)

[Claims] 1. A connection structure for connecting an outdoor drainage pipe connected to a building equipment drainage pipe to the outside of the ground and a drainage basin buried in the ground, the receiving structure being provided on a side wall of the drainage basin. In the connection structure in which the end of the outdoor drainage pipe is connected in a state of being inserted into the receiving port, the inner diameter of the receiving port is 1.4 times or more the outer diameter of the outdoor drainage pipe, and the receiving port is An elastic tubular body having elasticity capable of holding the outdoor drainage pipe at the center of the receiving port is interposed between the outdoor drainage pipe, and the opening end of the receiving port has an insertion hole into which the outdoor drainage pipe is inserted. And a connection structure between the outdoor drainage pipe and the drainage pipe, which is closed by an elastic cap that is elastically deformable in accordance with the movement of the outdoor drainage pipe. 2. The connection structure for an outdoor drainage pipe and a drainage basin according to claim 1, wherein the elastic tubular body is provided over substantially the entire length of the receiving port. 3. The outdoor drainage according to claim 1 or 2, wherein a plurality of ribs are provided around the outer peripheral portion of the elastic tubular body, and the tips of these ribs are in close contact with the inner peripheral surface of the receiving port. Connection structure between pipe and drainage basin.