JP2003253718A - Underfloor drain pipe structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an underfloor drain pipe structure capable of draining while keeping a communicating state between a floor side drain pipe and a bottom side drain pipe and realizing it in low cost even if the floor side drain pipe and the bottom side drain pipe are moved with a relatively large force by base isolation or the like. <P>SOLUTION: One end of a flexible pipe 4 is connected to one end of the floor side drain pipe 3 and the other end of the flexible pipe 4 is inserted drawably into the depth through one end opening of the bottom side draining pipe 2. By a horizontal relative movement of the floor side drain pipe 3 and the bottom side drain pipe 2, if the flexible pipe 4 is drawn out from the bottom side drain pipe 2 by a distance shorter than the insertion length, the communicating state between the floor side drain pipe 3 and the bottom side drain pipe 2 can be kept through the flexible pipe 4. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a structure of an underfloor drainage pipe.

[0002]

2. Description of the Related Art In a base-isolated building such as a house, for example, the ground side and the building side may be displaced in the horizontal direction. Therefore, the drain pipe on the floor side and the drain pipe on the bottom side of the underfloor space are In the underfloor space part, for example, while connecting one end of the flexible pipe to the floor side drain pipe, and connecting the other end of the flexible pipe to the bottom side drain pipe of the underfloor space part, the floor side drain pipe It is necessary to flexibly communicate with the bottom drainage pipe.

[0003]

However, in this way, one end of the flexible pipe is connected to the floor drain pipe and the other end of the flexible pipe is connected to the bottom drain pipe of the underfloor space. , The flexible pipe is flexible against bending, but is weak against tension. Therefore, when the floor drainage pipe and the bottom drainage pipe make a large horizontal relative movement during seismic isolation, etc. There is a problem that the pipe may be pulled and damaged.

Although flexible pipes having elasticity are also provided, such flexible pipes are very expensive.

In view of the above-mentioned conventional problems, the present invention provides a floor-side drain pipe and a bottom-side drain pipe even if the floor-side drain pipe and the bottom-side drain pipe make relatively large horizontal movements. An object of the present invention is to provide a structure of an underfloor drainage pipe that can perform drainage while maintaining communication with the pipe and that can be realized at low cost.

[0006]

[Means for Solving the Problems] The above-mentioned problems are solved by the bottom drainage pipe installed so that one end faces upward on the bottom side of the underfloor space portion, and one end faces downward above the one end of the drainage pipe. And a floor-side drainage pipe installed on the floor side, one end of the flexible pipe is connected to the one end of the floor-side drainage pipe, and the other end side of the flexible pipe is the one-end opening of the bottom-side drainage pipe. The flexible pipe is pulled out from the bottom drainage pipe by a length smaller than this insertion length due to the horizontal relative movement of the floor drainage pipe and the bottom drainage pipe. Even if
This is solved by a structure of an underfloor drainage pipe, characterized in that the floor side drainage pipe and the bottom side drainage pipe can be maintained in a communicating state through a flexible pipe.

In this structure, even if the floor-side drainage pipe and the bottom-side drainage pipe move horizontally relative to each other, the flexible pipe is only pulled out from the inside of the bottom-side drainage pipe. It is not pulled and the flexible tube is not damaged by pulling. Therefore, as long as the flexible pipe does not completely come out from the inside of the bottom side drain pipe, the communication state between the floor side drain pipe and the bottom side drain pipe is maintained, and the drainage can be performed without trouble. The size of the insertion length of the flexible pipe into the floor-side drainage pipe is more than that in consideration of the relative maximum displacement in the horizontal direction between the assumed floor-side drainage pipe and the bottom-side drainage pipe. Just set it longer for a minute.

Moreover, since the flexible pipe is not strongly stretched in this way, it is not necessary to use a stretchable flexible pipe, and an ordinary flexible pipe having low stretchability may be used. The structure can be realized at low cost.

After the floor-side drain pipe and the bottom-side drain pipe relatively move horizontally and the flexible pipe is pulled out from the inside of the bottom-side drain pipe, the floor-side drain pipe and the bottom-side drain pipe relatively move in the returning direction. It is recommended to design the flexible pipe so that it is pushed into the bottom drain pipe, but as long as the flexible pipe does not fall off from the bottom drain pipe, it is pushed into the bottom drain pipe. It may have a structure that does not obey.

Further, the above problem is that the bottom drain pipe is installed on the bottom side of the underfloor space portion so that one end faces upward, and the bottom drain pipe is installed above the one end of the drain pipe so that one end faces downward. The floor-side drainage pipe is provided, and one end of the ball-shaped rubber swelling pipe is connected to the one end of the floor-side drainage pipe, and the other end of the rubber-like swelling pipe is the bottom-side drainage pipe. The rubber bulging pipe is connected to the one end, and the floor-side drainage pipe and the bottom-side drainage pipe are deformed by the horizontal relative movement of the floor-side drainage pipe and the bottom-side drainage pipe. It is also solved by the structure of the underfloor drainage pipe, which is characterized in that it can maintain the communication state through the pipe.

In this structure, when the floor-side drain pipe and the bottom-side drain pipe move horizontally relative to each other, the rubber bulging pipe is deformed, so that the floor-side drain pipe and the bottom-side drain pipe are separated from each other. Keeps communicating with each other, and the rubber bulging pipe is not damaged by deformation due to its rubber property, and drainage can be performed without trouble.
In particular, because a ball-shaped rubber bulging tube is used,
It can be deformed well following large movements, and this deformation will not clog the drainage passage and will not allow foreign matter such as insects to enter inside.

Moreover, this ball-shaped rubber bulging tube is
Since it has a simple structure and can be manufactured at low cost, a flexible drain pipe structure under the floor can be realized at low cost.

Further, the above-mentioned problem is that the bottom side drain pipe is installed on the bottom side of the underfloor space portion so that one end faces upward, and the bottom side drain pipe is installed above the one end of the drain pipe so that one end faces downward. And a floor-side drainage pipe is provided, one end of the flexible pipe is connected to the one end of the floor-side drainage pipe, and an inner diameter larger than the outer diameter of the lower end of the flexible pipe is connected to the one end of the bottom-side drainage pipe. The flexible pipe has a lower end that opens into the hopper, and the flexible pipe moves in the horizontal relative movement process between the floor drain pipe and the bottom drain pipe. Bends directly or indirectly from the outside of the hopper, and then comes out beyond the peripheral wall of the hopper, and the horizontal relative positional relationship between the floor drain pipe and the bottom drain pipe is restored to the original positional relationship. Flexi by The lower end of the tube is solved by the structure of the underfloor drain pipe, characterized by being adapted to return to the initial state to the opening in the hopper portion.

In this structure, the floor drain pipe and the bottom drain pipe move horizontally relative to each other, and even if the flexible pipe comes off the hopper, the floor drain pipe and the bottom drain pipe are The horizontal relative position of the flexible pipe is restored to the original position so that the lower end of the flexible pipe returns to the initial state in which it opens in the hopper part. The communication with the drainage pipe is maintained, and drainage can be performed without hindrance.

In this structure, when the floor-side drain pipe and the bottom-side drain pipe move horizontally relative to each other, the flexible pipe may come out of the hopper. Drainage is rarely performed during the operation, and since such movement continues for a generally short time, there is almost no actual harm.

Rather, the structure is such that a general low-cost flexible tube that is not strong in tension can be used, and
It can be said that the structure can be highly evaluated in that it can reliably prevent the flexible pipe from being pulled.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

The underfloor drainage pipe structure of the first embodiment shown in FIG. 1 (a) is for use under the first floor of a base-isolated building such as a house, where 1 is an underfloor space and 2 is an underfloor. The bottom side drainage pipe of the space portion 1, 3 is a floor side drainage pipe, and 4 is a flexible pipe.

The bottom side drain pipe 2 is extended along the surface of the subfloor soil 5, and has an upward bent portion 2a so that one end 2b faces upward, and is fixed to the upper surface of the underfloor soil 5 with a metal fitting 6. Has been installed.

The floor-side drainage pipe 3 is installed by being inserted into a hole 7a formed in the floor 7 so that one end 3b of the bottom-side drainage pipe 2 is directed downward above the one end thereof. 3a is a flange.

The flexible tube 4 has a bellows shape and can be freely bent, and an elastic restoring force for returning to a straight state in a bent state works, and moreover, it cannot withstand pulling much. It consists of an ordinary flexible tube. One end thereof is connected to the lower end of the floor-side drainage pipe 3 and fastened by a clip 8, and the other end thereof is inserted so as to be pulled out to the inner rear side through an end opening 2b of the bottom-side drainage pipe 2. The insertion length of the flexible pipe 4 into the bottom side drain pipe 2 is somewhat larger than that in consideration of the relative maximum displacement amount of the floor side drain pipe 3 and the bottom side drain pipe 2 in the horizontal direction. It should be set long.

In this embodiment, the inner diameter of the bottom drainage pipe 2 is set to the maximum value of the flexible pipe 4 so that the flexible pipe 4 can be smoothly pulled out and pushed in the bottom drainage pipe 2. It is designed to be a little larger than the outer diameter of the outside, and therefore the flexible pipe 4 and the bottom drain pipe 2
There is a risk that insects may enter the inside of the bottom drain pipe 2 through Therefore, an insect repellent cover 9 is provided for the purpose of preventing insects from entering the bottom drainage pipe 2.

The insect repellent cover 9 is a bag-like member which is capable of preventing insects from entering and has flexibility and elasticity. Inside the bag, the flexible tube 4 and the bottom side are provided. The lower end side is fastened to the outer peripheral side of the end of the bottom side drain pipe 2, and the upper upper side is fastened to the outer peripheral part of the flexible pipe 4 so that the drain pipe 2 is present.

In the above structure, as shown in FIG. 1B, when the floor drainage pipe 3 and the bottom drainage pipe 2 move in the horizontal relative direction at the time of base isolation, the flexible pipe 4 is moved. Is only pulled out from the inside of the bottom side drain pipe 2, so that it is not strongly pulled, and the flexible pipe 4 is not damaged by pulling. When the floor-side drainage pipe 3 and the bottom-side drainage pipe 2 move relatively toward each other in the horizontal direction, the flexible pipe 4 is pushed into the inside of the bottom-side drainage pipe 2 and the seismic isolation is completed. When the building is restored, it returns to the state shown in FIG.

Therefore, unless the flexible pipe 4 completely comes out from the inside of the bottom side drain pipe 2 due to a large seismic isolation, the communication between the floor side drain pipe 3 and the bottom side drain pipe 2 is seismically isolated. It is maintained through the front and back, and drainage can be done without any problems.

Moreover, as described above, the flexible tube 4
There is no need to use expensive flexible pipes because it does not have a strong tensile force, and a flexible drain pipe structure under the floor can be realized at low cost using ordinary flexible pipes with low elasticity. be able to.

The underfloor drainage pipe structure of the second embodiment shown in FIG. 2 (a) has a bottom drainage pipe 2 provided with a trumpet-shaped portion 2c. Others are substantially the same as those in the first embodiment. As shown in FIG. 2B, the flexible pipe 4 can be smoothly moved in and out of the bottom drain pipe 2 by the portion 2c opened like the trumpet. Although the insect cover is omitted, it goes without saying that it may be attached.

The underfloor drainage pipe structure of the third embodiment shown in FIG. 3 (a) has a structure in which the floor side drainage pipe 3 and the bottom side drainage pipe 2 are connected by a ball-shaped rubber bulging pipe 10. is there. 8, 8
Is a clip for connection. In this structure,
As shown in, when the floor-side drainage pipe 3 and the bottom-side drainage pipe 2 move horizontally relative to each other, the rubber bulging pipe 10 is deformed, so that the floor-side drainage pipe 3 and the bottom-side drainage pipe 3 are deformed. The communication state with the pipe 2 is maintained, the rubber bulging pipe 10 is not damaged by deformation due to its rubber property, and drainage can be performed without any trouble before and after seismic isolation. In particular, the ball-shaped rubber bulging tube 10 can be successfully deformed by following a large horizontal movement, and the deformation does not clog the drainage passage, and foreign matter such as insects may enter inside. Absent.

In the underfloor drainage pipe structure of the fourth embodiment shown in FIG. 4A, one end of the flexible pipe 4 is connected to the floor side drainage pipe 3, and the flexible pipe 4 is connected to the bottom side drainage pipe 2.
Is provided with a hopper portion 2d having an inner diameter larger than the outer diameter of the lower end portion of the. The inner diameter of the hopper portion 2d is preferably, for example, twice or more the outer diameter of the lower end of the flexible tube 4. The lower end of the flexible tube 4 is opened in the hopper portion 2d, and an annular deodorant packing 11 is provided between the outer peripheral portion of the lower end of the flexible tube 4 and the inner peripheral portion of the upper end of the hopper portion 2d. Has been done.

The lower end of the flexible tube 4 may be projected and opened in the hopper portion 2d. If the deodorant packing 11 is used as shown in the figure, the deodorant packing 11 is placed in the hopper portion 2d. The lower end of the flexible tube 4 may be projected into the hopper portion 2d in such a manner that the lower end of the flexible tube 4 projects toward the inner peripheral side of the deodorant packing but does not project into the hopper portion 2d.

Then, in this structure, due to seismic isolation,
When the floor-side drainage pipe 3 and the bottom-side drainage pipe 2 move relative to each other in the horizontal direction, first, as shown in FIG. 5 (a), the flexible pipe 4 has a lower end portion thereof with a deodorant packing. The force is indirectly received from the hopper portion 2d via 11 and bends. Then, when further separated, the flexible tube 4 is moved to the hopper portion 2d as shown in FIG.
The deodorant packing 11 falls off as it goes over the peripheral wall of the. Then, when the floor side drain pipe 3 and the bottom side drain pipe 2 are restored in a direction in which they approach each other, the lower end portion of the flexible pipe 4 contacts the outer peripheral portion of the hopper portion 2d as shown in FIG. , Bends. Then, the floor side drainage pipe 3 and the bottom side drainage pipe 2 are restored to the original positional relationship, so that the lower end of the flexible pipe 4 crosses the peripheral wall of the hopper portion 2d, and the hopper portion 2
It is designed to return to the initial state of opening in d.

In this structure, even if the flexible pipe 4 comes off the hopper portion 2d, the floor side drain pipe 3 and the bottom side drain pipe 2
By restoring the relative positional relationship in the horizontal direction to the original positional relationship, the lower end of the flexible pipe 4 returns to the initial state in which it opens in the hopper portion 2d. The communication state between the pipe 3 and the bottom side drain pipe 2 is restored and maintained, and drainage can be performed without any trouble. In addition,
The deodorant packing 11 may be attached again after restoration.

In this structure, the floor side drain pipe 3 is used as described above.
When the bottom drain pipe 2 and the bottom drain pipe 2 move horizontally relative to each other, the flexible pipe 4 may come out of the hopper portion 2d, but this is a momentary movement. Drainage is rarely done during operation, so there is almost no real harm. Rather, it is possible to use a general low-cost flexible tube that is not strong against pulling, and yet to reliably prevent the flexible tube from being unintentionally pulled. It can be said that this is an excellent structure that is worthy of evaluation in terms of realization.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above-described first, second, and fourth embodiments, the case where the bellows-shaped pipe is used as the flexible pipe is shown, but various flexible pipes such as hoses may be used.
It may also be used for buildings other than seismic isolated buildings. Also,
Of course, the main body pipe portion of the bottom side drain pipe may be buried under the soil or below the ground.

[0035]

Since the present invention is as described above, even if the floor-side drain pipe and the bottom-side drain pipe make a large relative movement in the horizontal direction, the floor-side drain pipe and the bottom-side drain pipe are Drainage can be performed while maintaining communication with the pipe, and it can be achieved at low cost. In particular, it is a structure that can be used very effectively in seismic isolated buildings.

[Brief description of drawings]

FIG. 1 (a) is a partial cross-sectional side view showing the structure of the first embodiment, and FIG. 1 (b) is a partial cross-sectional side view showing movement during seismic isolation.

FIG. 2A is a partial cross-sectional side view showing the structure of the second embodiment, and FIG. 2B is a partial cross-sectional side view showing the movement during seismic isolation.

FIG. 3A is a partial cross-sectional side view showing the structure of the third embodiment, and FIG. 3B is a partial cross-sectional side view showing the movement during seismic isolation.

FIG. 4 is a partial cross-sectional side view showing the structure of the fourth embodiment.

FIG. 5 is a partial cross-sectional side view showing the movement of the structure of the fourth embodiment during base isolation.

[Explanation of symbols]

1 ... Underfloor space 2 ... Bottom drain pipe 2d ... Hopper part 3 ... Floor side drainage pipe 4 ... Flexible tube 7 ... Floor 10 ... Ball-shaped rubber swelling tube

Claims (3)

[Claims] 1. A bottom-side drain pipe installed at the bottom side of the underfloor space portion so that one end faces upward, and a floor side installed at the floor side so that one end faces downward above the one end of the drain pipe. A drainage pipe is provided, one end of the flexible pipe is connected to the one end of the floor-side drainage pipe, and the other end side of the flexible pipe is inserted into the inner rear side through the one-end opening of the bottom-side drainage pipe so as to be pulled out. Even if the flexible pipe is pulled out from the bottom drain pipe by a length shorter than this insertion length due to the horizontal relative movement of the floor drain pipe and the bottom drain pipe, The structure of the underfloor drainage pipe, characterized in that the bottom drainage pipe can be maintained in communication through a flexible pipe. 2. A bottom side drain pipe installed at one end of the underfloor space portion so that one end faces upward, and a floor side installed at the bottom side above the one end of the drain pipe so that one end faces downward. A drain pipe is provided, one end of a ball-shaped rubber bulging pipe is connected to the one end of the floor side drain pipe, and the other end side of the rubber bulging pipe is connected to the one end of the bottom drain pipe. The rubber bulging pipe is deformed by the horizontal relative movement of the floor drain pipe and the bottom drain pipe, and the floor drain pipe and the bottom drain pipe communicate with each other through the rubber bulging pipe. The structure of the underfloor drainage pipe is characterized by being designed so that it can be maintained. 3. A bottom-side drain pipe installed at one end of the under-floor space portion so that one end faces upward, and a floor side installed at the bottom side above one end of the drain pipe so that one end faces downward. A drainage pipe is provided, one end of the flexible pipe is connected to the one end of the floor-side drainage pipe, and a hopper portion having an inner diameter larger than the outer diameter of the lower end of the flexible pipe is attached to the one end of the bottom-side drainage pipe. The lower end of the flexible pipe is opened into the hopper portion, and the flexible pipe is directly or indirectly connected from the hopper portion in the process of the horizontal relative movement of the floor drain pipe and the bottom drain pipe. After being flexed by the force, it goes out over the peripheral wall of the hopper, and then the horizontal relative positional relationship between the floor side drain pipe and the bottom side drain pipe is restored to the original positional relationship. The lower end of the flexible tube is Structure of underfloor drain pipe, characterized by being adapted to return to the initial state which opens in a chromatography unit.