JP7195515B2 - Rainwater branch joint - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rainwater branch joint for taking out part of rainwater flowing down a downpipe for the purpose of effective use of rainwater.

In recent years, due to water shortages and growing awareness of environmental conservation, it is being considered to effectively utilize rainwater as a resource, such as gray water supply, rather than letting rainwater flow directly into rivers, seas, etc. through public waterways as sewage. , the installation of rainwater tanks for this purpose is becoming active in public and private facilities. Originally, unlike sewage, rainwater can be discharged into rivers and seas without being purified, so its use as cleaning water for facilities and roads, watering plants, sprinkling water, etc. is being considered. .

The supply of rainwater to rainwater tanks is often provided from rain gutters of buildings such as public and private facilities. For existing rain gutters, there has been proposed a rainwater branching joint that extracts part of the rainwater flowing down the downspout to the outside (see, for example, Patent Document 1).

In this patent document 1, since relatively large debris such as dead leaves and insects usually flows into the rain gutter together with rainwater, the rainwater is branched and stored in the rainwater tank after removing the debris with a perforated plate. In addition, since the lid covering the opening can be opened to take out dust on the inner perforated plate, an advantage of easy maintenance has been proposed.

JP 2012-46944 A

In Patent Document 1, the perforated plate is formed in a donut shape with an open center from the open edge of the lower end of the lid to the upper end of the cylindrical portion by weaving metal threads in a net shape, and maintenance is facilitated by opening the lid. However, the dust placed on the perforated plate remains on the perforated plate, and the accumulation of the dust tends to cause clogging at the rainwater branch joint.

The present invention prevents clogging by removing dust such as dead leaves and insects that fall down the downpipe with rainwater without using a net such as a perforated plate, and rainwater that can take out the rainwater from which the dust has been removed. The purpose is to obtain a branch joint.

A rainwater branching joint according to the invention described in claim 1 is connected to a cylindrical joint body disposed between an upper downspout into which rainwater flows and a lower downspout, and a lower end of the upper downspout. an upper inlet through which rainwater flows into the interior of the joint main body, and a branch flow that branches part of the rainwater from the upper inlet into a water intake flow path that communicates with the rainwater tank from the side of the joint main body. A rainwater branching joint comprising an outlet and a lower drainage port connected to the upper end of the lower downspout and allowing rainwater not branched at the branch outlet to flow down to the lower downspout below the joint main body,
The joint main body portion includes an outer cylindrical portion extending downward in diameter continuously provided downstream of the upper inlet, and an outer cylindrical portion provided in a lower region in the joint main body portion along the axis of the outer cylindrical portion. an inner cylindrical portion having a smaller diameter than the outer cylindrical portion connected to the lower drain port and having an opening inner diameter equal to the inner diameter of the upper inlet; an inner wall of the outer cylindrical portion and an outer wall of the inner cylindrical portion; and a rainwater reservoir composed of the inner wall of the outer cylindrical portion, the outer wall of the inner cylindrical portion, and the bottom, and the branch outlet is located in the space of the rainwater reservoir A plurality of fins having the same outer shape are provided on the inner wall of the outer cylindrical portion of the joint main body to protrude in the axial direction from the upper position to the lower position of the inner wall. is provided around the inner wall peripheral surface, and the opening connecting the protruding ends of the fins at the same height position formed on the inner wall peripheral surface by the protruding fin group The minimum inner diameter is the same as the inner diameter of the opening of the inner cylindrical portion of the rainwater reservoir at a height position directly above the open end of the inner cylindrical portion.

The present invention can prevent clogging by guiding garbage that flows down the downspout with rainwater to the center without using a mesh such as a perforated plate, and removing the garbage while it falls from the upper downspout to the lower downspout. There is an effect that rainwater from which dust has been removed can be taken out to the outside.

1 is a cross-sectional view showing the configuration of an embodiment of a rainwater branch joint of the present invention; FIG. FIG. 2 is a plan view of FIG. 1; FIG. 2 is an explanatory view showing installation of the rainwater branch joint of FIG. 1; FIG. 4 is a cross-sectional view showing the configuration of another embodiment of the rainwater separation joint of the present invention;

In the present invention, a cylindrical joint main body portion disposed between an upper downpipe and a lower downpipe into which rainwater flows, and rainwater flowing into the joint main body portion connected to the lower end of the upper downpipe. a branch outlet that branches part of the rainwater from the upper inlet into a water intake channel that communicates with the rainwater tank from the side of the joint body, and a branch flow that is connected to the upper end of the lower downspout The rainwater branching joint is provided with a lower drain port for causing rainwater not branched at the outlet to flow down to the lower downpipe below the joint main body.

The joint main body portion includes an outer cylinder portion connected to the downstream side of the upper inlet, and an outer cylinder provided in a lower region in the joint main body portion along the axis of the outer cylinder portion and connected to the lower drain port. a bottom connecting the inner wall of the outer cylinder and the outer wall of the inner cylinder at the same height position; and the inner wall of the outer cylinder, the outer wall of the inner cylinder, and the bottom. The branch outlet of the rainwater branching joint communicates with the space of the water sump through the outer wall of the joint main body.

The rainwater branch joint of the present invention has a mechanism for removing dust. Specifically, a projecting fin group in which a plurality of fins having the same outer shape projecting in the axial direction from the upper position to the lower position of the inner wall of the outer cylindrical portion of the joint main body are provided around the inner wall peripheral surface. The minimum inner diameter of the opening connecting the projecting ends of the fins at the same height position that are provided around the inner wall peripheral surface by the group of projecting fins is the height position directly above the opening end of the inner cylindrical portion of the rainwater reservoir. , the diameter is the same as the inner diameter of the opening of the inner cylindrical portion.

As a result, instead of separating rainwater and garbage with a perforated plate, the group of projecting fins separates the garbage that flows down the downpipe from the rainwater, and by guiding the garbage downward, only the garbage is removed from the upper downspout. can be dropped into the lower downspout. In this way, a rainwater branch joint can be obtained which can prevent clogging by removing dust such as dead leaves and insects falling down along with rainwater and can take out the rainwater from which the dust has been removed.

That is, the individual fins constituting the projecting fin group of the present invention are axially projecting from the upper position to the lower position on the inner wall of the outer cylindrical portion of the joint body, and have the same external shape. A plurality of these fins are circumferentially provided on the inner wall peripheral surface of the outer cylindrical portion to form a projecting fin group. Since the individual fins have the same shape, the opening connecting the projecting ends of the fins at the same height position around the inner wall peripheral surface by the group of projecting fins is at the height position where the projecting length is the longest. is the minimum inner diameter.

In the present invention, this minimum inner diameter is the same diameter as the opening inner diameter of the inner cylindrical portion at a height position immediately above the open end of the inner cylindrical portion of the rainwater reservoir. For this reason, for example, when the external shape of the outer cylindrical portion has the same diameter as the external shape of the upper downspout in order to obtain a desirable appearance, the projecting ends of the fins at the same height position in the group of projecting fins are connected. The opening gradually decreases in diameter from the upper position of the inner wall to the height position of the minimum inner diameter.

By setting the opening diameter of this minimum inner diameter as the opening diameter of the inner cylindrical portion, debris such as dead leaves and insects that fall with rainwater along the downspout will gradually move in the axial direction due to its own weight. It is possible to remove debris such as dead leaves and insects that fall from the projecting fin group directly above the inner cylinder, fall into the opening of the inner cylinder, and fall down the downpipe together with rainwater. As a result, it is possible to obtain a rainwater branch joint capable of preventing clogging with dust and taking out rainwater from which dust has been removed.

To explain the operation of the rainwater separation joint of the present invention more specifically, rainwater mainly flows down along the inner wall surface of the downpipe due to surface tension, except when there is a large amount of rain such as a heavy rain. A large amount of debris such as dead leaves and insects, especially debris such as dead leaves, falls down along the inner wall surface of the vertical tub due to the surface tension of rainwater.

When rainwater and dust reach the upper end of the projecting fin group of the rainwater separation joint of the present invention, most of the rainwater traveling along the inner wall surface is from between the individual fins to the outer cylindrical portion of the separation joint. Rainwater flows down along the inner wall, reaches the bottom surface of the rainwater reservoir, accumulates in the rainwater reservoir, is discharged from the branch outlet to the outside of the joint, and reaches the rainwater tank from the water intake channel communicating with the branch outlet.

Debris, on the other hand, slides over the individual fins and is separated from the main rainwater. That is, since the dust is in contact only with the edges of the individual fins, the weight of the dust, the very small amount of rainwater flowing along the edges of the fins, and the raindrops that do not flow along the inner wall of the downpipe separate the dust. moves axially within the converging openings of the fins along the edges of the fins of the fins. It separates from the protruding fin group directly above the inner cylindrical portion, drops into the opening of the inner cylindrical portion, and drops from the lower drain port to the lower downspout.

In the projecting shape of the fins of the present invention, the minimum inner diameter of the opening of the fin group should be the same as the inner diameter of the opening of the inner cylinder, and the size of the inner diameter of the opening of the inner cylinder does not matter. For this reason, both inner diameters may be the same so that the opening inner diameter of the inner cylindrical portion is flush with the upper downspout so that the dust falling down the upper downspout can smoothly fall down the lower downspout. For example, when the diameter of the outer cylinder portion is expanded downward and the diameter of the opening of the inner cylinder portion is the same as that of the upper downspout, dust falling down the upper downspout can smoothly fall down the lower downspout.

The material for the rainwater branch joint of the present invention may be any material that has sufficient mechanical strength and is excellent in weather resistance, corrosion resistance, durability, and the like. It may be composed of only one kind of material, or may be composed of a combination of two or more kinds of materials. For example, a resin material such as vinyl chloride resin or a metal material such as stainless steel may be used singly or in combination.

FIG. 1 is a sectional view showing the structure of one embodiment of the rainwater branching joint of the present invention. 2 is a plan view of FIG. 1. FIG. FIG. 3 is an explanatory diagram showing the installation of the rainwater branch joint of FIG. As shown in FIGS. 1 and 2, the rainwater branch joint 10 of this embodiment includes a joint main body 11, an upper inlet 12, a branch outlet 13, and a lower drain 14. As shown in FIGS.

Specifically, the rainwater branch joint 10 is a cylindrical body disposed between an upper downspout 31 and a lower downspout 32 into which rainwater flows. The upper inlet 12 is connected to the lower end of the upper downspout 31 and allows rainwater to flow into the joint body 11 . The branched outflow port 13 is branched into a water intake channel 34 that allows part of the rainwater from the upper inflow port 12 to communicate with the rainwater tank 30 from the side of the joint main body 11 . The lower drain port 14 is arranged at the upper end of the lower downspout 32 and communicates the rainwater not branched at the branch outlet 13 to the lower downspout 32 below the rainwater branching joint 10 .

The branch outlet 13 is formed by the inner wall of the outer cylindrical portion 15 of the joint main body 11 communicating with the upper inlet 12, and the outer wall of the inner cylindrical portion 16 disposed immediately below the upper inlet 12 and having a smaller diameter than the outer cylindrical portion 15. , and a bottom portion 17 connecting the inner wall of the outer cylindrical portion 15 and the outer wall of the inner cylindrical portion 16 at the same height. there is

The inner wall of the outer cylindrical portion 15 of the joint main body portion 11 is provided with a projecting fin group 20 composed of a plurality of fins 21 projecting in the axial direction.
The protruding fin group 20 has the same diameter as the opening diameter of the inner tubular portion 16 at a height position directly above the open end of the inner tubular portion 16 of the rainwater reservoir 18 from the upper position to the lower position on the inner wall of the outer tubular portion 15 . A plurality of fins 21 gently projecting in the axial direction are provided around the inner wall peripheral surface of the outer cylindrical portion 15 .

As shown in FIG. 3, the rainwater falling on the roof 35 is collected by the under-eaves lateral gutter 33 arranged below the edge of the roof 35, and flowed down to the drainage channel 36 by the downpipes 31 and 32. As shown in FIG. The rainwater branch joint 10 of the present embodiment is arranged between the upper downspout 31 and the lower downspout 32 to introduce part of the rainwater into the rainwater tank 30 and store it.

That is, the main rainwater falling on the roof 35 flows down along the inner wall surface of the upper downspout 31 due to surface tension. A large amount of debris such as dead leaves and insects, especially debris such as dead leaves, falls along the inner wall surface of the upper downpipe 31 due to the surface tension of rainwater. When rainwater and dust reach the upper end of the projecting fin group 20 of the rainwater separation joint 10, the rainwater that has traveled along the inner wall surface of the upper downpipe 31 is mainly separated from between the individual fins 21. The rainwater flows down along the inner wall of the outer cylindrical portion 15 of the joint 10, reaches the bottom surface 17 of the rainwater reservoir 18, accumulates in the rainwater reservoir 18, is discharged to the outside from the branch outlet 13, and the rainwater communicates with the branch outlet 13. It reaches the tank 30.

Debris, on the other hand, slides over the individual fins 21 and is separated from the main rainwater. Since the dust is in contact only with the edges of the individual fins 21, the weight of the dust, the minute rainwater flowing along the edges of the fins 21, and the raindrops that do not flow along the inner wall of the downpipe separate the dust. move axially inside the opening 22 formed by the group of fins whose diameters are reduced along the edges of the fins 21 . It separates from the projecting fin group 20 directly above the inner cylindrical portion 16 and drops into the opening of the inner cylindrical portion 16 and into the lower downspout 32 . As a result, trash can be dropped from the upper downspout to the lower downspout, and trash such as dead leaves and insects falling down the downspout together with rainwater can be removed. As a result, it is possible to obtain a rainwater branch joint capable of preventing clogging with dust and taking out rainwater from which dust has been removed.

FIG. 4 is a sectional view showing the construction of another embodiment of the rainwater separation joint of the present invention. As shown in FIG. 4, in the rainwater separation joint 40 of this embodiment, the opening diameter of the inner cylindrical portion 46 is the same as that of the upper downspout so that the garbage falling down the upper downspout can smoothly fall down the lower downspout. It has become. That is, the rainwater branch joint 40 of this embodiment also includes a joint main body 41 , an upper inlet 42 , a branch outlet 43 and a lower drain 44 .

Specifically, the rainwater branching joint 40 is a cylindrical body that is disposed between an upper downspout and a lower downspout into which rainwater flows and whose diameter increases midway. The upper inflow port 42 is connected to the lower end of the upper downspout and allows rainwater to flow into the interior of the joint main body 41 . The branched outflow port 43 is branched into a water intake channel that communicates part of the rainwater from the upper inflow port from the side of the joint main body 41 to the rainwater tank. The lower drain port 44 is connected to the upper end of the lower downspout and causes rainwater not branched at the branch outflow port 43 to flow down to the lower downspout below the rainwater branch joint 40 .

The branched outflow port 43 is connected to the inner wall of the outer cylindrical portion 45 of the joint main body portion 41 that communicates with the upper inflow port 42 and expands in diameter downward, and the outer cylindrical portion 45 that is disposed immediately below the upper inflow port 42 and has a diameter smaller than that of the outer cylindrical portion 45 . and a bottom portion 47 that closes the space between the inner wall of the outer cylindrical portion 45 and the outer wall of the inner cylindrical portion 46 and connects them at the same height. The outer wall of the main body part 41 is penetrated and communicated.

The outer cylinder part 45 of the joint main body part 41 is expanded in diameter downward, and the opening 52 formed by the fin group extends from the upper position of the inner wall where the diameter expansion starts to the lower position. At the height position just above the opening end of the inner cylinder part 46, the inner diameter of the opening is the same until it reaches the inner diameter of the opening of the inner cylinder part 46. A projecting fin group 50 is provided in which a plurality of fins 51 provided are provided around the inner wall peripheral surface of the outer cylindrical portion 45 .

Since the inner diameter of the opening of the protruding fin group 50 is the same as that of the upper inlet 42, the dust falling down the upper downspout can smoothly fall down from the lower drain port to the lower downspout.
Thus, it is possible to obtain a rainwater branch joint capable of removing dust such as dead leaves and insects dropping down the downpipe together with rainwater, preventing clogging, and taking out the rainwater from which the dust has been removed to the outside.

INDUSTRIAL APPLICABILITY The rainwater branching joint according to the present invention can branch and store a part of rainwater flowing down a downspout and use it as domestic water.

10, 40... Rainwater branch joint,
11, 41 ... joint main body,
12, 42 ... upper inlet,
13, 43... branch outflow port,
14, 44 ... lower drainage port,
15, 45... Outer cylinder part,
16, 46... inner cylindrical portion,
17, 47...bottom part,
18, 48... rainwater reservoir,
20, 50... projecting fin group,
21, 51... fins,
22, 52... Aperture by fin group,
30 ... rainwater tank,
31 ... upper downpipe,
32 ... lower downpipe,
33 ... Eaves under the eaves,
34 ... fractionation channel,
35 Roof,
36 drainage channels,

Claims (1)

A tubular joint body disposed between an upper downspout into which rainwater flows and a lower downspout, and an upper flow connected to a lower end of the upper downspout and into which rainwater flows into the joint main body. an inlet, a branch outlet for branching part of the rainwater from the upper inlet into a water intake channel that communicates with the rainwater tank from the side of the joint main body, and the branch connected to the upper end of the lower downspout A rainwater branching joint provided with a lower drain port for causing rainwater not branched at the outflow port to flow down to the lower downpipe below the joint main body,
The joint main body portion includes an outer cylindrical portion extending downward in diameter continuously provided downstream of the upper inlet, and an outer cylindrical portion provided in a lower region in the joint main body portion along the axis of the outer cylindrical portion. an inner cylindrical portion having a smaller diameter than the outer cylindrical portion connected to the lower drain port and having an opening inner diameter equal to the inner diameter of the upper inlet; an inner wall of the outer cylindrical portion and an outer wall of the inner cylindrical portion; and a rainwater reservoir composed of the inner wall of the outer cylindrical portion, the outer wall of the inner cylindrical portion, and the bottom, and the branch outlet is located in the space of the rainwater reservoir A plurality of fins having the same outer shape are provided on the inner wall of the outer cylindrical portion of the joint main body to protrude in the axial direction from the upper position to the lower position of the inner wall. is provided around the inner wall peripheral surface, and the opening connecting the protruding ends of the fins at the same height position formed on the inner wall peripheral surface by the protruding fin group A rainwater branching joint, wherein the minimum inner diameter is equal to the inner diameter of the opening of the inner cylindrical portion of the rainwater reservoir at a height position directly above the open end of the inner cylindrical portion of the rainwater reservoir.

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