JPH0642123A - Rainwater adjusting method and rainwater outflow adjusting basin - Google Patents

Abstract

PURPOSE:To form a rainwater tank on the roof and adjust the quantity of rainwater flowing into a roof drain installed on the roof by equipping the drain with an flow-out adjusting basin. CONSTITUTION:A rainwater flow-out adjusting basin 1 furnished with an opening 5 at the bottom is installed as surrounding a roof drain installed on the roof, and outside of the basin 1 a rainwater tank is formed which stores that quantity of rainwater corresponding to the difference between the precipitation and the rate of flow through the opening 5. The rainwater stored in the rainwater tank is led so as to flow into the roof drain via the opening 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rainwater adjusting method and a rainwater outflow adjusting rod in which a rainwater tank is formed on the roof by arranging an outflow adjusting rod on a roof drain installed on the roof to adjust the amount of rainwater flowing into the roof drain. Regarding

[0002]

2. Description of the Related Art When rainwater is drained as it is to a sewer pipe, the amount of rain flows directly into the sewer pipe. Therefore, if the amount of rain per unit time is large, a large amount of rainwater will temporarily flow into the sewer pipe. Therefore, the flow rate of water flowing through the sewer pipe exceeds a predetermined flow rate, and overflowing rainwater may overflow, flooding roads and residential areas, or causing flooding due to flooding of rivers.

[0003] Therefore, in many areas, the control of rainwater outflow to control the drainage of rainwater to the sewer pipe is institutionalized. This rainwater outflow control means allows draining up to a certain amount of rainwater outflow, and temporarily stores more rainwater outflow in a rainwater storage tank provided in the basement of the building or in the site, in consideration of the flooding situation of the river. There are two types: one that drains little by little, and one that allows up to a certain amount of rainwater runoff and allows more than a certain amount of rainwater runoff to permeate underground through a rainwater infiltration facility.

[0004]

According to the rainwater adjusting method of the above-mentioned type, it is necessary to install a rainwater storage tank or a rainwater underground infiltration facility in the basement of a building or in a site, which requires a high cost for the facility. There are difficulties. The present invention has been made in view of the above points, and an object thereof is to provide a rainwater outflow adjusting method and a rainwater outflow adjusting rod that can suppress rainwater outflow without requiring expensive equipment.

[0005]

According to the rainwater adjusting method of the present invention, a rainwater outflow adjusting rod having a rainwater opening at a lower end thereof is arranged so as to surround a roof drain installed on a roof, and is provided outside the rainwater outflow adjusting rod. , A rainwater tank that stores the difference between the rainfall amount and the flow rate through the rainwater opening is formed, and the rainwater that is stored in the rainwater tank is configured to flow into the roof drain through the rainwater opening of the rainwater outflow control basin.

The rainwater outflow adjustment basin of the present invention comprises a cylindrical body having an opening through which rainwater passes at the lower end, and a lower cover which is vertically movably attached to the lower portion of the cylindrical body and which has a variable opening area. Configured to have.

Further, in the rainwater outflow adjusting rod of the present invention, an upper cover is provided on the upper portion of the tubular body so as to be vertically movable, and the height of the tubular body as a whole is adjusted.

[0008]

In the rainwater adjusting method of the present invention, the rainwater outflow adjusting rod having the rainwater opening at the lower end is arranged so as to surround the roof drain installed on the roof, and the amount of rainfall flows through the rainwater opening provided in the rainwater outflow adjusting rod. If there is more, the difference in the amount of rain is stored in the rainwater tank formed outside the rainwater outflow control basin, and if the amount of rainfall is less than the flow rate through the rainwater opening provided in the rainwater outflow control basin, it is stored in the rainwater cistern. The amount of rainwater that flows through the rainwater outlet of the rainwater outflow adjustment basin controls the amount of rainwater that flows into the roof drain through the rainwater outflow adjustment basin and suppresses the outflow of rainwater.

Further, in the rainwater outflow adjusting basin of the present invention, the rainwater opening area is adjusted by adjusting the vertical position of the lower cover, and the height of the rainwater tank is adjusted by adjusting the vertical position of the upper cover. The amount of rainwater that flows into the roof drain according to changes in rainfall can be adjusted, and the height of the rainwater tank can be adjusted.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a rainwater outflow adjusting rod 1 used in the rainwater adjusting method of the present invention. The rainwater outflow adjusting rod 1 has a tubular body 2 and an upper cover 3 attached to an outer surface of the tubular body 2. It comprises a lower cover 4.

The cylindrical main body 2 has a cylindrical shape with the upper end and the lower end opened, and an opening 5 through which rainwater passes and a screw surface 6 extending from the upper end to the lower end on the outer surface. Has been done. The opening 5 is formed by cutting out the lower end of the tubular body 2. This opening 5
1 is one in FIG. 1, but may be two or more as needed. Although not shown, it is preferable to arrange a fence or the like in the opening 5 to prevent fallen leaves and the like from flowing into the opening 5.

The upper cover 3 has a ring shape as a whole, and a screw surface 7 corresponding to the screw surface 6 provided on the cylindrical main body 2 is formed on the inner surface of the upper cover 3. Also, protrusions are formed on the upper surface of the upper cover 3 at intervals in the circumferential direction,
When the water overflowing the fence-shaped portion formed by these protrusions flows into the inside, fallen leaves and the like are prevented from flowing in. The upper cover 3 is, as shown in FIG.
The height of the side wall of the tubular body 2 as a whole is adjusted by being screwed onto the upper outer surface of the tubular body 2 and by positioning the upper portion of the upper cover 3 above the upper surface of the tubular body 2. Body 2
A rainwater tank having a depth corresponding to the height of the side wall is formed on the outside of the. The rainwater tank stores rainwater having a difference between the amount of rainfall per unit time and the flow rate through the rainwater opening.

The lower cover 4 has a ring shape as a whole, and a threaded surface 8 corresponding to the threaded surface 6 provided on the cylindrical main body 2 is formed on the inner surface of the lower cover 4. Then, as shown in FIG. 2, the lower cover 3 is screwed onto the lower outer surface of the tubular body 2 to adjust the area of the opening 5 provided in the tubular body 2. In FIG. 1, reference numeral 9 is a fixing screw for fixing the upper cover 3 to the cylindrical main body 2, and reference numeral 10 is a fixing screw for fixing the lower cover 3 to the cylindrical main body 2. Further, in FIG. 2, reference numeral 11 is a roof drain installed on the rooftop. Next, the operation will be described. To adjust the drainage of rainwater that has fallen on the roof of the building, first, as shown in FIG. 2, arrange the rainwater outflow adjustment rod 1 so as to surround the roof drain 11 installed on the roof, and then the lower cover 4. The area of the rainwater opening 5 of the rainwater outflow adjusting rod 1 is adjusted by rotating the tubular body 2 and moving it up and down with respect to the tubular body 2. The area of the rainwater opening 5 determines the rainwater flow rate per unit time. After the area of the rainwater opening 5 is determined, the lower cover 3 is fixed to the tubular body 2 with the fixing screw 10.

Next, the upper cover 3 is rotated with respect to the tubular main body 2 and moved up and down with respect to the tubular main body 2, whereby the height h of the rainwater outflow adjusting rod 1 is adjusted. The height h of the rainwater outflow adjusting rod 1 determines the height of the rainwater tank.

By disposing the rainwater outflow adjusting rod 1 so as to surround the roof drain 11 installed on the roof, the drainage of rainwater is adjusted. That is, when the amount of rainfall is less than the prescribed amount corresponding to the area of the rainwater opening 5, as shown in FIG. 3, the rainwater that has fallen on the roof directly passes through the rainwater opening 5 of the rainwater outflow adjustment basin 1 and flows out. It is sent into the inside of the adjustment basin 1 and is drained from the roof drain 11 through the drainage pipe. In this case, rainwater is not stored in the rainwater tank.

When the amount of rainfall is larger than the prescribed amount corresponding to the area of the rainwater opening 5, the rainwater opening 5 acts as a diaphragm as shown in FIG. 4, so that part of the rainwater that has fallen on the roof is It passes through the rainwater outflow opening 5 of the rainwater outflow adjustment basin 1 and is sent into the rainwater outflow adjustment basin 1, and the rest is rainwater outflow adjustment basin 1
It is stored in a rainwater tank formed outside the. The rainwater stored in this rainwater tank flows out when the amount of rainfall becomes smaller than a prescribed amount corresponding to the area of the rainwater opening 5. This regulates the drainage of rainwater.

When the amount of rainfall is particularly larger than the prescribed amount corresponding to the area of the rainwater opening 5, as shown in FIG. 5, it is sent into the rainwater outflow adjusting tank 1 through the rainwater opening 5 of the rainwater outflow adjusting tank 1. The remaining portion is stored up to the height of the rainwater outflow adjusting rod 1 in a rainwater tank formed outside the rainwater outflow adjusting rod 1,
The amount of rainwater stored in the rainwater tank flows into the rainwater outflow adjusting rod 1 through the upper opening of the rainwater outflow adjusting rod 1 and passes through the drain pipe from the roof drain 11 by an amount exceeding the height of the rainwater outflow adjusting rod 1. Be drained. Even in this case, the amount of rainwater stored in the rainwater tank is discharged when the amount of rainfall is less than the prescribed amount corresponding to the area of the rainwater opening 5, and the drainage of rainwater is adjusted.

As described above, since the amount of rainwater stored in the rainwater tank formed outside the rainwater outflow control rod 1 is the difference between the amount of rainfall per unit time and the flow rate through the rainwater opening 5, the area of the rainwater opening 5 is By adjusting, the flow rate through the rainwater opening 5 and the amount of rainwater stored in the rainwater tank can be adjusted.

As shown in FIG. 5, the overflowed rainwater may be guided to a rainwater storage tank in the basement of the building or on the premises and discharged to the sewer or the like with a time lag. May be. In this case, the rainwater storage tank and the rainwater underground seepage tank may be smaller than those of the prior art. In the above embodiment, the rainwater outflow adjusting rod 1 is circular, but the rainwater outflow adjusting rod may be rectangular, and in this case, the upper cover and the lower cover are slidably attached to the main body.

[0020]

As described above, according to the present invention, rainwater outflow can be suppressed without requiring expensive equipment, and the opening area and side wall height of the rainwater outflow adjusting rod are simple. Can be adjusted to.

[Brief description of drawings]

FIG. 1 is a perspective view of a rainwater outflow adjusting rod of the present invention.

FIG. 2 is a view showing a use state of the rainwater outflow adjusting rod of the present invention.

FIG. 3 is a diagram showing a state in which the rainwater outflow adjusting rod of the present invention has a small amount of rainfall.

FIG. 4 is a view showing a state in which the amount of rainfall in the rainwater outflow regulating rod of the present invention exceeds the specified drainage amount.

FIG. 5 is a view showing a state in which rainwater overflows from a rainwater tank formed on the outside of the rainwater outflow adjusting basin of the present invention.

[Explanation of symbols]

 1 Rainwater outflow adjustment rod 2 Tubular body 3 Upper cover 4 Lower cover 5 Opening 6 Screw surface 7 Screw surface 8 Screw surface 11 Roof drain

Claims (3)

[Claims] 1. A rainwater outflow adjusting rod having a rainwater opening at a lower end thereof is arranged so as to surround a roof drain installed on a roof,
Forming a rainwater tank on the outside of the rainwater outflow adjustment basin that stores rainwater with a difference in the amount of rainfall and the flow rate through the rainwater opening, and pouring the rainwater stored in the rainwater basin into the roof drain through the rainwater opening of the rainwater outflow adjustment basin. Rainwater adjustment method characterized by. 2. A rainwater outflow adjusting rod having a tubular main body having an opening through which rainwater passes at a lower end thereof, and a lower cover movably attached to a lower portion of the tubular main body and having a variable opening area. 3. The rainwater outflow adjusting rod according to claim 2, further comprising an upper cover which is attached to an upper portion of the tubular body so as to be vertically movable and which adjusts a height of the tubular body as a whole.