JPH082221Y2 - Rainwater basin - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a rainwater basin that stores rainwater that has flowed into a rain gutter and discharges it to a drain pipe.

(Prior Art) As a conventional rainwater basin, for example, as described in Japanese Utility Model Publication No. 63-116587, inside a basin body in which a rain gutter connection portion and a drain pipe connection portion are formed on a side wall, There is an inner cylinder pipe that discharges rainwater near the center of the bottom of the cell body to the outside of the cell. In this rainwater basin, the bottom of the basin body is formed in an inverted conical shape, and the rain gutter connection portion extends in the circumferential tangential direction of the side wall of the basin body. A permeation hole is provided in the side wall of the basin body.

That is, in the above-mentioned conventional rainwater basin, the rainwater flowing from the rain gutter connected to the rain gutter connection portion becomes a vortex by flowing along the inner peripheral surface of the bottom of the basin body, and the sediment contained in the rainwater Etc. are concentrated in the central part of the bottom due to the centripetal force of the vortex, so that the mud water containing a large amount of earth and sand flows out to the drain pipe connected to the drain pipe connection part.

(Problems to be solved by the invention) However, in such a conventional rainwater basin,
The area through which rainwater penetrates is limited to the vicinity of the basin body and cannot penetrate a wide area. If a perforated pipe is used for the drain pipe connected to the drain pipe connection to permeate rainwater over a wide area, the permeation layer around the drain pipe may be clogged by the muddy water that extends from the hole of the perforated pipe. Become. Therefore, it is necessary to use a non-perforated pipe for the drainage pipe connected to the drainage pipe connection part, and the permeation facility must be installed side by side with the drainage facility. If this happens, the number of parts will increase, and the piping work will be troublesome, resulting in a high cost.

The present invention focuses on the above-mentioned conventional problems, and an object thereof is to provide a rainwater basin that allows a drainage facility to function as an infiltration facility by using a perforated pipe as the drainage pipe.

(Means for Solving the Problems) In order to achieve the above-mentioned object, a rainwater basin of the present invention comprises a small-diameter basin and a large-diameter basin arranged in an outer double layer, and rain formed on the side wall of the small-diameter basin. A gutter connection part, a drain pipe connection part formed on the side wall of the large diameter basin, an inner cylinder pipe provided inside the small diameter basin and discharging rainwater flowing into the small diameter basin to the outside of the small diameter basin, It is provided between the small-diameter basin and the large-diameter basin, and is provided with a communication passage for guiding rainwater discharged from the inner tubular pipe to a drain pipe connecting portion, and the bottom of the small-diameter basin is formed in an inverted conical shape, and The rain gutter connection part penetrates the side wall of the large diameter basin and extends in the circumferential tangential direction of the side wall of the small diameter basin, and a part of the communication passage is constituted by a mud tank.

(Operation) In the rainwater basin of the present invention, the rainwater flowing from the rain gutter connected to the rain gutter connection part is included in the rainwater because the rainwater flows along the inner peripheral surface of the bottom of the small diameter basin. Since the sediment and the like are concentrated in the center of the bottom by the centripetal force of the vortex, the mud containing a large amount of the sediment is discharged to the outside of the small-diameter basin by the inner tube. Then, the muddy water discharged from the inner pipe is guided to the communication passage and flows out to the drain pipe connected to the drain pipe connecting portion, but a part of the communication passage is constituted by the mud reservoir tank. Therefore, when it flows into the mud tank and the flow velocity drops, the sediment in the mud sinks to the bottom of the mud tank, and only the supernatant flows to the drain pipe.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

 First, the configuration of the embodiment will be described.

FIG. 1 is a plan view showing a rainwater basin of an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG. 1, in which 1 is a small diameter basin, 2 is a large diameter basin, 3 rain gutter connection parts, Reference numeral 4 is a drainage pipe connecting portion, 5 is an inner cylindrical pipe, and 6 is a communication passage.

The small-diameter basin 1 and the large-diameter basin 2 are molded products made of a synthetic resin or the like. The small-diameter basin 1 has a bottom 11 formed in an inverted conical shape, and the large-diameter basin 2 has a bottom 21 partially. It is formed by opening. Further, the small diameter container 1 and the large diameter container 2 are arranged in an inner and outer double manner. It should be noted that the small-diameter basin 1 is provided unevenly in the large-diameter basin 2, and the side wall 12 is inscribed in the side wall 22 of the large-diameter basin 2.

The gutter connection part 3 is formed on the side wall 12 of the small diameter basin 1.
It is integrally molded with the same material as the small diameter basin 1. The rain gutter connecting portion 3 is provided so as to penetrate the side wall of the large diameter basin 2 and extends in the circumferential tangential direction of the side wall 12 of the small diameter basin 1.

The drainage pipe connecting portion 4 is formed on the side wall 22 of the large diameter basin 2 and is integrally formed of the same material as the large diameter basin 1.

The inner tube 5 is provided inside the small diameter basin 1 and discharges rainwater near the center of the bottom of the small diameter basin 1 to the outside of the small diameter basin 1 and is formed separately from the small diameter basin 1. ing. That is, the inner cylindrical tube 5 is an inverted L-shaped tube that is bent at a substantially right angle, and one opening end is located near the center of the bottom of the small diameter rod 1 and the other opening end penetrates the side wall of the small diameter rod 1. And then piped.

A cutout portion 13 is formed at the upper edge of the side wall of the small diameter basin 1, and the cutout portion 13 is arranged immediately above the portion through which the inner cylindrical pipe 5 penetrates.

The communication passage 6 is provided between the small diameter basin 1 and the large diameter basin 2, and guides the rainwater discharged from the inner tubular pipe 5 to the drainage pipe connecting portion 4. The rainwater discharged from the inner tubular pipe 5 is First inflow
The groove 61, the mud tank 62 into which the rainwater flowing down from the first groove 61 flows, the second groove 63 into which the rainwater flowing out from the mud tank 62 flows, and the rainwater flowing down from the second groove 63 are It is configured with an inflow trough portion 64, and the downstream end portion of the trough portion 64 is connected to the drain pipe connecting portion 4. A partition plate 65, which is slightly lower than the height of the gutter portion 64, is provided at the downstream end of the gutter portion 64.

The rainwater basin of the present embodiment, as shown in FIG.
It is embedded on the permeation layer 7 formed by laminating gravel,
The upper part of the large diameter basin 2 is covered with a lid (not shown).
Is provided. Further, a rain gutter 8 arranged in a building is connected to the rain gutter connection portion 3, and a drain pipe 9 is connected to the drain pipe connection portion 4.

 Next, the operation of the embodiment will be described.

In the rainwater basin of the present embodiment, the rainwater flowing from the rain gutter 8 connected to the rain gutter connection portion 3 becomes a vortex by flowing along the inner peripheral surface of the bottom 11 of the small diameter basin 1 and is contained in the rainwater. Since the soil and the like that are accumulated are concentrated in the central portion of the bottom 11 by the centripetal force of the vortex, the mud containing a large amount of the sediment is discharged to the outside of the small diameter basin 1 by the inner cylindrical pipe 5. Then, the muddy water discharged from the inner tubular pipe 5 is guided to the communication passage 6 and flows out to the drain pipe 9 connected to the drain pipe connecting portion 4, but a part of the communication passage 6 is accumulated in the mud. As it is composed of tank 62, mud tank 62
When the flow velocity falls into the mud and the flow velocity decreases
It sinks to the bottom of 62, and only the supernatant flows out to the drain pipe 9. Even if the sediment is not completely removed in the mud tank 62 and the rainwater containing the sediment flows into the second groove 63, when the rainwater flows out from the trough 64 to the drain pipe 9, the rainwater passes over the partition plate 65. Since it has a structure that must be washed away,
The flow velocity of the rainwater drops again in the trough portion 65, the earth and sand sink to the bottom of the mud tank 62, and the supernatant flows out to the drain pipe 9.

As described above, since the rainwater basin of the present embodiment has a structure in which only the supernatant from which soil and sand have been removed flows out to the drainage pipe 9 connected to the drainage pipe connecting portion 4, the drainage pipe 9 has a perforated pipe. The use of does not cause clogging of the permeation layer 10 around the drain pipe 9. Therefore, with a simple structure in which the perforated pipe is used as the drain pipe 9, the drainage facility can be made to function as a permeation facility.

Further, when the amount of rain flowing into the small diameter basin 1 from the rain gutter 8 exceeds the amount of rain discharged from the inner cylindrical pipe 5 to the communication passage 6 and the water surface of the rainwater stored in the small diameter basin 1 reaches the cutout 13, The cutout 13 overflows into the communication passage 6. Further, the amount of rainfall flowing from the second groove portion 63 of the communication passage 6 into the gutter portion 64 exceeds the amount of rainfall flowing out of the gutter portion 64 into the drain pipe 9, and the water surface of the rainwater stored in the gutter portion 64 is the upper edge of the gutter portion 64. When it reaches, the rainwater overflows from the trough portion 64, and the overflowed rainwater permeates the permeation layer 7 below the large diameter basin 2. From the trough portion 64, only the supernatant liquid from which the earth and sand have been removed overflows, so the overflow does not cause clogging of the permeation layer 7.

The embodiment of the present invention has been described in detail above with reference to the drawings.
The specific configuration is not limited to this embodiment, and even if there are design changes and the like within the scope of the present invention, they are included in the present invention.

For example, a hole may be formed in the side wall of the small diameter pit. In such a case, since the small diameter basin has a structure in which the earth and sand mixed in the rainwater is removed by the inner tube 5, the clear water from which the earth and sand have been removed is opened at the bottom 21 of the large diameter basin 2 through the hole. Will penetrate the surrounding permeation layer.

Further, although the small diameter basin is installed eccentrically in the large diameter basin, it may be installed concentrically depending on the diameter of the large diameter basin. In this case, the communication passage may be linearly connected to the large-diameter drainage pipe connecting portion without detouring. Further, a drain pipe for inflow may be connected to the small diameter container through the side wall of the large diameter container. That is, the permeation region can be greatly expanded by connecting the plurality of rainwater basins with a perforated pipe.

(Effect of the Invention) As described above, the rainwater basin of the present invention has a structure in which only the supernatant liquid from which the sediment has been removed flows out to the drain pipe connected to the drain pipe connection portion. Even if a perforated pipe is used as the drain pipe, the permeation layer around the drain pipe will not be clogged. Therefore, it is possible to obtain the effect that the drainage facility can function as a permeation facility with a simple structure in which a perforated pipe is used for the drainage pipe.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of the rainwater basin of the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG. 1 ... small diameter basin 11 ... bottom, 12 ... side wall 2 ... large diameter basin 21 ... bottom, 22 ... side wall 3 ... rain gutter connection 4 ... drain pipe connection 5 ... inner tube 6 ... communicating passage 62 ... mud reservoir

Claims (1)

[Scope of utility model registration request] 1. A small-diameter basin and a large-diameter basin, which are arranged inside and outside, a rain gutter connection formed on the side wall of the small-diameter basin, and a drain pipe connection formed on the side wall of the large-diameter basin. An inner cylinder pipe provided inside the small diameter basin for discharging rainwater flowing into the small diameter basin to the outside of the small diameter basin, and provided between the small diameter basin and the large diameter basin from the inner cylindrical pipe. And a communication passage for guiding the discharged rainwater to the drain pipe connection portion, the bottom of the small diameter basin is formed in an inverted conical shape, and the rain gutter connection portion penetrates the side wall of the large diameter basin to form a side wall of the small diameter basin. A rainwater basin extending in the circumferential tangential direction, wherein a part of the communication passage is constituted by a mud tank.