JP3676149B2 - Rainwater storage device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a rainwater storage device, and more particularly to a rainwater storage device capable of removing initial rainwater at the beginning of falling, which contains a lot of dust, and storing clean rainwater thereafter.
[0002]
[Prior art]
Conventionally, rainwater that has fallen on the roof or roof of a building is stored in a storage tank, and this rainwater is effectively used as domestic water. However, the conventional rainwater storage device simply connects the rain gutter disposed on the roof and the storage tank, and has a structure that collects all rainwater in the storage tank. The initial rainwater that began to fall, which contained a lot of water, was also collected in the tank, and the stored rainwater became dirty, and dust accumulated in the tank immediately and had to be frequently cleaned.
[0003]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described drawbacks of the conventional rainwater storage device, eliminates dirty initial rainwater that begins to descend and contains a lot of dust, and clean water after that. It is a technical problem to provide a rainwater storage device that can store water in a tank and has a simple structure and is easily disassembled.
[0004]
Another technical problem of the present invention is to provide a rainwater storage device that can reliably remove dirty initial rainwater that starts to fall and contains a lot of dust to the drainage channel.
[0005]
Another technical problem of the present invention is to provide a rainwater storage device capable of allowing excess rainwater to flow toward the drainage channel from which initial rainwater has been removed when the storage tank is full. is there.
[0006]
In addition, another technical problem of the present invention is to provide an easy-to-maintain rainwater storage device that can be easily cleaned by removing a diverter that diverts rainwater into dirty initial rainwater and clean rainwater from the gutter. It is in.
[0007]
Furthermore, the other technical subject of this invention is providing the rainwater storage apparatus which can increase / decrease the rainwater storage amount suitably.
[0008]
[Means for Solving the Problems]
In order to solve the above technical problem, the present invention provides:
A shunt 1 connected to a rain gutter G through which rainwater flows and internally branched into a drainage channel 11 and a catchment channel 12 and a storage tank 2 connected to the catchment channel 12 of the shunt 1 and storing rainwater A rainwater storage device,
The shunt 1 includes an introduction channel 10 formed into a rectangular tube, except for a portion of the introduction end portion 10a connected to the gutter G, and a rectangular tubular drainage channel that is bifurcated below the introduction channel 10. 11 and while Ru and a water collecting route 12, the reservoir the flow divider 1 is said below the branch section that branches into two is formed overflow channel 16 which communicates the drainage channel 11 and the condensing water channel 12 tank 2 Ri drainable der excess rainwater during full to drainage 11, and the inner surface of the flow divider 1 that branches to the the drainage channel 11 and the water collecting route 12 diverted protruding toward the water collecting route 12 A convex portion 13 is formed, and a rectifying convex portion 14 is formed above the diverting convex portion 13 so as to protrude in a direction opposite to the diverting convex portion 13 and through the introduction end portion 10a. that rainwater flowing from the gutter G can be configured to flow down the said shunt projection 13 of the feed path 10 and the rectifying protrusion 14 The
When the amount of rainwater flowing into the water separator 1 is small and the water level of the rainwater W ₁ flowing down the rectifying convex portion 14 and the diverting convex portion 13 is low, the rainwater W ₁ flows from the edge of the diverting convex portion 13 to the drainage channel 11. drained by the Maseru write,
When the amount of rainwater flowing into the diverter 1 increases and the water level of the rainwater W ₂ flowing down the rectifying convex portion 14 and the diverting convex portion 13 becomes high, the rainwater W ₂ gains the flowing inertia and vigorously enters the collecting channel 12. It is characterized in that it is configured to collect water by pouring.
[0009]
Further, in order to solve the above-mentioned problems, the present invention adds drainage to the inner surface of the road wall sandwiching the rainwater flow path of the introduction path 10 that branches into the drainage path 11 and the water collection path 12 in addition to the above means as necessary. A technical means was adopted in which an inclined guide convex portion 15 having a low side end 15a on the side of the channel 11 and a high side end 15b on the side of the water collecting channel 12 was formed.
[0010]
[0011]
Further, in order to solve the above-described problems, the present invention provides a technology in which, in addition to the above-described means, the shunt 1 is integrally formed of a synthetic resin and is detachable from the gutter G. Adopted the means.
[0012]
Furthermore, in order to solve the above-described problems, the present invention employs technical means that a plurality of storage tanks 2 are connected in a separable manner in addition to the above-described means.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a rainwater storage device according to the present invention will be described in detail based on an embodiment shown in the accompanying drawings. 1 is an overall side view of the rainwater storage device of the present embodiment, FIG. 2 is an overall perspective view of the shunt of the rainwater storage device, FIG. 3 is a cross-sectional view taken along line AA in FIG. 2, and FIG. FIG. 5 and FIG. 6 are schematic cross-sectional views showing a state in which the diverter of the rainwater storage device diverts rainwater, and FIG. 7 is an extra storage tank in the diverter of the rainwater storage device. It is a cross-sectional schematic diagram which shows a mode that a storm water overflows to a drainage channel.
[0014]
As shown in FIG. 1, the rainwater storage device of this embodiment includes a shunt 1 connected in the middle of a well-known rain gutter G · G ′ that collects rainwater that has fallen on the roof of a building H, and the shunt 1 and a storage tank 2 connected to 1.
[0015]
As shown in FIG. 2, the shunt 1 of the present embodiment is integrally formed of a polyethylene resin by a hollow molding method, and includes a rectangular tubular introduction path 10 for introducing rainwater from a gutter G, and the introduction path 10. It is composed of a rectangular tubular drainage channel 11 and a water collecting channel 12 that are bifurcated downward. An upper gutter G is detachably connected to the end 10a of the introduction channel 10 of the flow divider 1, and a lower gutter G 'is detachably connected to the end 11a of the drainage channel 11. A storage tank 2, which will be described later, is detachably connected to the 12 end portions 12a.
[0016]
As shown in FIGS. 2 and 5, on the inner surface of the flow divider 1, a branching convex portion 13 is formed at a branching portion between the drainage channel 11 and the catchment channel 12 so as to protrude toward the catchment channel 12. At the same time, a rectifying convex portion 14 is formed above the diverting convex portion 13 so as to protrude in the opposite direction to the diverting convex portion 13. In the figure, what is indicated by reference numerals 13a and 14a are recessed ribs formed on the outer surface of the introduction path of the flow divider 1 in order to reinforce each of the flow dividing convex portion 13 and the rectifying convex portion 14. The inner surface side of the introduction passages 13a and 14a forms a branching convex portion 13 and a rectifying convex portion 14.
[0017]
Further, as shown in FIGS. 2 and 3, the branch portion of the inner surface of the flow divider 1 is formed on the inner surface of the road wall that sandwiches the rainwater flow path of the introduction path 10 that branches into the drainage path 11 and the water collection path 12. An inclined guide convex portion 15 is formed which has a low side end portion 15a on the drainage channel 11 side and a high side end portion 15b on the water collection channel 12 side. By this guiding convex portion 15, the initial rainwater that travels along the side surface of the branching portion is guided toward the drainage channel 11. In the present embodiment, guide convex portions 15 and 15 are formed on both sides of the inner wall surface of the rectangular tubular introduction path 10 sandwiching the flow dividing convex portion 13 of the flow divider 1 so as to face each other.
[0018]
Furthermore, as shown in FIGS. 2 and 5, an overflow channel 16 that connects the water collection channel 12 and the drainage channel 11 is formed below the branch portion of the flow divider 1. As shown in FIGS. 2 and 4, a total of two pairs of vertical rod-like auxiliary convex portions 17, 17, 18, 18 facing each other are formed on the inner surface of the path 16. These auxiliary projections 17, 17, 18, and 18 prevent dirty initial rainwater from flowing along the inner surface of the overflow channel 16 to the catchment channel 12 side, and clean rainwater on the inner surface of the overflow channel 16 It is prevented from flowing to the drainage channel 11 side.
[0019]
On the other hand, the storage tank 2 of the present embodiment is integrally formed of polyethylene resin by a hollow molding method and is configured in a box shape. As shown in FIG. 1, a pair of upper and lower connection ports are provided on both sides of the tank body. Are connected so as to be separable by a connecting pipe 3. The connecting ports 20, 20... Of adjacent storage tanks 2, 2. As described above, the rainwater storage device of the present embodiment can increase or decrease the rainwater storage amount appropriately by connecting a plurality of storage tanks 2 as necessary. A filter (not shown) is attached to the connection port 20 of the storage tank 2 to prevent inflow of dust and mosquitoes from entering the tank.
[0020]
Further, a water drain plug 21 is provided at the bottom of the storage tank 2 so that the stored rainwater in the tank can be completely removed. This makes it possible to easily remove dust and dust collected in the storage tank 2 and prevent the stored rainwater from freezing in winter. In the figure, what is indicated by reference numeral 22 is an upper stopper provided at the upper part of the tank, and what is indicated by reference numeral 23 is a water level meter that communicates with the inside of the tank for visually checking the water level in the tank. The reference numeral 24 indicates a water intake cock attached to the connection port 20 of the outermost storage tank 2.
[0021]
Thus, the rainwater storage device of the present embodiment eliminates initial rainwater that begins to fall and contains a lot of dust by the shunt 1 connected to the gutter G, and stores clean rainwater after that in the storage tank 2. And when this storage tank 2 becomes full, excess rainwater is discharged to a drainage channel.
[0022]
That is, the initial rainwater at the beginning of falling generally has a low rainfall intensity (mm / hour) and a small amount of rainwater flowing into the introduction path 10 of the flow divider 1 (for example, 1 liter / minute or less). As shown in FIG. 5, the initial rain water W ₁ is rectified by the rectifying convex portion 14 and flows down toward the tip of the diverting convex portion 13 located below, and flows down the diverting convex portion at a low water level to the edge of the diverting convex portion 13 The water flows down to the drainage channel 11, flows down the drainage channel 11, and is drained to the rain gutter G '. Thus, the dirty initial rainwater W ₁ that starts to fall and contains a lot of dust is drained through the drainage channel 11. At this time, the initial rainwater that is going to flow into the catchment channel 12 side along the side of the branch portion is also guided to the drainage channel 11 direction by the guide convex portions 15 and 15, so the initial rainwater W ₁ is surely It is drained into the drainage channel 11.
[0023]
In contrast, when the rainwater flow through the feed path 10 by the rain becomes regular rainfall increases (e.g., 1 liter / min or more), as shown in FIG. 6, a large regular rainfall rainwater W ₂ of the flow rectifying protrusion 14 , And flows down to the base of the diverting convex portion 13, and descends the slope of the diverting convex portion at a high water level to obtain the flowing inertia and vigorously pour it into the water collecting channel 12. Thus, the main rainwater W _{2 that} has been cleaned after the initial rainwater is stored in the storage tank 2 through the catchment channel 12. At this time, clean main rainwater W ₂ does not leak to the drainage channel 11 side through the overflow channel 16 by the guiding action of the auxiliary convex portions 18 and 18 formed on the inner wall surface of the overflow channel 16. .
[0024]
Then, when rainwater is stored in the storage tank 2 and the storage tank 2 becomes full, as shown in FIG. 7, excess rainwater W ₃ overflowing the tank is drained through the overflow channel 16 of the flow divider 1. It can drain to Road 11.
[0025]
As described above, the rainwater storage device according to the present embodiment can divert the initial rainwater containing a lot of dust and the clean rainwater after that using the flow divider 1 by utilizing the difference in flow rate. There is no inconvenience that the rainwater stored in the tank is contaminated by the initial rainwater containing a lot of dust and high acidity, and the dust immediately accumulates in the tank and must be cleaned frequently. There are no difficulties.
[0026]
Further, in this diverter 1, a guiding convex portion 15 in which a side end portion 15a on the drainage channel 11 side is lowered and a side end portion 15b on the water collection channel 12 side is raised at a branch portion between the drainage channel 11 and the water collection channel 12 is provided. Therefore, it is possible to guide the initial rainwater that is going to flow into the catchment channel 12 side along the side of this branching part toward the drainage channel 11, and reliably drain the initial rainwater with a small rainwater flow rate. 11 can be eliminated.
[0027]
The shunt 1 is also provided with an overflow channel 16 that connects the catchment channel 12 and the drainage channel 11, so that excess rainwater when the storage tank 2 is full is drained from the initial rainwater. Therefore, it is possible to cause the drainage to flow out by using the drainage channel 11, and it is not necessary to add any drainage mechanism to the storage tank 2. Therefore, the structure of the storage tank 2 can be simplified correspondingly, and an inexpensive rainwater storage device can be provided.
[0028]
Further, in the rainwater storage device of this embodiment, the flow divider 1 and the storage tank 2 are simple in structure and are integrally formed of synthetic resin, and the flow divider 1 can be easily detached from the rain gutter, and the flow is divided. Since the container 1 and the storage tank 2 can be easily separated from each other, they can be easily cleaned and maintenance is easy.
[0029]
Furthermore, in the rainwater storage device of the present embodiment, the storage tanks 2 can be connected to each other. Therefore, if necessary, a plurality of storage tanks 2 are connected to appropriately increase or decrease the amount of rainwater storage. Can do.
[0030]
【The invention's effect】
As described above with the embodiment, in the rainwater storage device according to the present invention, the flow difference between the initial rainwater containing a lot of dust and the clean rainwater after that is used by the shunt convex portion on the inner surface of the shunt. Therefore, there is no inconvenience that the rainwater stored in the tank is contaminated by the initial rainwater that contains a lot of dust and has a high acidity as in the conventional product. There is no problem that dust accumulates and must be cleaned frequently.
[0031]
In addition, in this shunt, a guiding convex portion is formed at the branch portion between the drainage channel and the catchment channel, with the side end portion on the drainage channel side lowered and the side end portion on the catchment channel side raised. Therefore, it is possible to guide the initial rainwater to flow into the drainage channel through the side surface of the section in the direction of the drainage channel, and to reliably exclude the initial rainwater having a small rainwater flow rate to the drainage channel.
[Brief description of the drawings]
FIG. 1 is an overall side view of a rainwater storage apparatus according to an embodiment.
FIG. 2 is an overall perspective view of a shunt of the rainwater storage device.
FIG. 3 is a cross-sectional view taken along line AA in FIG.
4 is a sectional view taken along line BB in FIG. 2. FIG.
FIG. 5 is a schematic cross-sectional view showing a state in which the flow divider of the rainwater storage device diverts rainwater.
FIG. 6 is a schematic cross-sectional view showing a state in which the flow divider of the rainwater storage device diverts rainwater.
FIG. 7 is a schematic cross-sectional view showing a state in which the shunt of the rainwater storage device causes excess rainwater in the storage tank to overflow into the drainage channel.
[Explanation of symbols]
1 shunt
11 Drainage channel
12 Catchment channel
13 Shunt convexity
13a Recessed rib
14 Rectification convex part
14a Recessed rib (of rectifying convex part)
15 Guide convex
15a Side end (on the drainage channel 11 side of the guide projection 15)
15b Side edge (on the catchment channel 15 side of the catchment channel 12)
16 Overflow channel 2 Storage tanks G and G 'Rain gutter W ₁ and W ₂ Rainwater

Claims (4)

A rainwater storage device comprising a shunt connected to a rain gutter through which rainwater flows and internally branched into a drainage channel and a water collection channel, and a storage tank connected to the water collection channel of the flow divider and storing rainwater, This shunt has an introduction channel formed into a rectangular tube, except for the portion of the introduction end connected to the rain gutter, and a rectangular tubular drainage channel and a water collecting channel that are bifurcated under the introduction channel. On the other hand, an overflow channel that connects the water collecting channel and the drainage channel is formed below the bifurcated portion where the diverter branches into the bifurcated portion, and drains excess rainwater when the storage tank is full to the drainage channel. A shunting convex portion projecting toward the water collecting channel is formed on the inner surface of the shunt that branches into the drainage channel and the water collecting channel, and above the shunting convex portion, the shunting flow is formed. Rectification that protrudes in the opposite direction to the convex part By parts is rainwater flowing from the rain gutter through the input end to form a configured to flow down the said diversion protrusion of the introduction path and the rectifying protrusion, rectification convex small rainwater amount flowing into the water separator When the water level of the rainwater flowing down the head and the shunting convex portion is low, the rainwater is drained by flowing into the drainage channel from the edge of the shunting convex portion, and the amount of rainwater flowing into the water separator increases, so that the rectifying convex portion and the shunting flow A rainwater storage device characterized in that, when the level of rainwater flowing down a convex portion becomes high, water can be collected by obtaining the inertia of the rainwater and pouring it into the water collecting channel vigorously.   On the inner surface of the road wall that sandwiches the rainwater flow path of the introduction path that branches into the drainage channel and the catchment channel, an inclined guiding convex portion is formed with a lower side end on the drainage channel side and a higher side end on the catchment channel side. The rainwater storage device according to claim 1, wherein The rainwater storage device according to claim 1 or 2 , wherein the shunt is integrally formed of a synthetic resin and is detachable from the rain gutter. Rainwater storage device according to any one of claims 1 to 3 in which a plurality of the storage tank is characterized in that it is connected detachably.

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