JP7239774B2 - Drainage materials and rain gutters - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act Publication date: January 26, 2018 Posting address: Sekisui Chemical Co., Ltd. website https://www. sekisui. co. jp/news/2018/1317011_31754. html Publication date: February 1, 2018 Publication: Sekisui Chemical Co., Ltd. catalog "Large high drainage system"

The present invention relates to drainage members and rain gutters.

Conventionally, as a rain gutter system in which rainwater flowing down from the eaves of a roof is received by an eaves gutter and drained downward, the eaves gutter attached to the eaves of the roof of a house is connected to the eaves gutter and downspout by a downspout joint, and along the outer wall. It is generally connected to a drainage pipe buried in the ground.
On the other hand, this type of rain gutter system is required to increase the amount of drainage per unit time without damaging the appearance of the house, etc., and to be able to discharge rainwater appropriately to the drainpipe even during heavy rain. . Therefore, in order to increase the flow rate of water that can be treated by the eaves gutters, it is necessary to increase the cross-sectional dimensions of the eaves gutters themselves, or to increase the diameter and number of the downpipes and downpipes. However, these have problems such as an increase in cost and a deterioration in appearance.

Therefore, as a rain gutter device that increases the amount of wastewater treatment without increasing the diameter or increasing the number, for example, as described in Patent Document 1, the opening area of the downpipe and the downpipe is set to an appropriate size. BACKGROUND ART A siphon-type drainage device is known that can drain a large amount of rainwater extremely efficiently by siphon action during heavy rain. The drainage device of Patent Document 1 has a configuration in which a swirl prevention member is attached to the upper end of the siphon pipe on the lower surface side of the eaves gutter to eliminate the intake of air due to the swirl, thereby stabilizing the drainage by the siphon action. .

JP 2004-308399 A

However, in the conventional siphon type drainage device as shown in the above-mentioned Patent Document 1, although it has a structure in which an eddy current prevention member (drainage member) is attached to the upper end of the siphon pipe, a hand is inserted near the bottom surface of the eaves gutter. There was a problem in terms of workability. In addition, since the eddy current prevention member has a shape that follows the inner surface of the pipe of the downpipe, for example, when foreign matter that has flowed in from the eaves gutter clogs the eddy current prevention member, it is difficult to remove it, and the work requires time and effort. Therefore, there is room for improvement in this respect.
In addition, since the opening area of the downspout is as small as 20 cm ² or less, the maximum drainage flow rate was not sufficient even with the use of siphon action.
Moreover, since it is necessary to prepare a drainage member suitable for each diameter of the downspout, there is a problem in terms of economy. It was required to have suitable siphon performance.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide a drainage member capable of suppressing costs, having a simple structure with excellent workability, and exhibiting excellent siphon performance. there is

A drainage member according to the present invention includes an eaves gutter having a through hole formed in its bottom surface, and a down gutter connected to the eaves gutter via a gutter joint connected to the lower surface of the through hole. A drainage member provided in a gutter, comprising: a cylindrical tubular portion inserted into the through hole to form a drain port; a plate-shaped flange extending radially outward from an upper end of the tubular portion; and a plurality of vertical ribs connecting an upper surface of the brim and an outer peripheral portion of a lower surface of the brim. An inflow opening is formed therebetween, the tubular portion, the flange portion, the lid member and the longitudinal rib are integrally formed, the central axes of the tubular portion and the lid member are aligned in the vertical direction, and the tubular portion A male thread is formed on the outer surface of the shaft joint to be screwed with a female thread formed on the inner surface of the downpipe joint, the lid member is circular when viewed from the direction of the central axis, and the plurality of vertical ribs are and the longitudinal ribs are formed in a plate-like shape extending in the radial direction, and the opening area of the drop opening is 30 cm ² or more. 190 cm ² or less.
Further, a drainage member according to the present invention includes an eaves gutter having a through hole formed in its bottom surface, and a downspout connected to the eaves gutter via a gutter joint connected to the lower surface of the through hole. A drainage member provided in a rain gutter, comprising: a cylindrical cylindrical portion that is inserted into the through-hole to form a drop opening; a flange that is installed on the bottom surface of the eaves gutter; a lid member disposed above; and a plurality of vertical ribs connecting an upper surface of the brim portion and an outer peripheral portion of a bottom surface of the brim portion, and an inflow opening between the lid member and the brim portion. is formed, the connecting portion between the tubular portion and the flange portion is formed with a curved surface, the tubular portion, the flange portion, the lid member and the longitudinal rib are integrally formed, and the outer surface of the tubular portion is formed with a male thread that can be screwed with a female thread formed on the inner surface of the downpipe joint, the plurality of vertical ribs have lower ends provided at the connecting portion, and the vertical ribs extend in the radial direction It is formed in a plate shape, and the opening area of the drop opening is 30 cm ² or more and 190 cm ² or less.
Further, in the drainage member according to the present invention, the upper end of the cylindrical portion is below the bottom surface of the eaves gutter, and the lower end of the vertical rib is between the upper end of the cylindrical portion and the bottom surface of the eaves gutter. is preferred.
Further, in the drainage member according to the present invention, it is preferable that the height of the lid member from the bottom surface is 0.1 to 0.5 times the maximum water level in the eaves gutter.
Further, in the drainage member according to the present invention, it is preferable that a guiding guide is formed on the lower surface of the lid member, and the guiding guide is conical.
Further, in the drainage member according to the present invention, it is preferable that the lid member has a shape recessed downward in cross-sectional view.
Further, the rain gutter according to the present invention includes an eaves gutter, the drainage member installed on the bottom surface of the eaves gutter, a vertical gutter joint connected to the cylindrical portion projecting downward from the bottom of the eaves gutter, a first elbow connected to the downpipe joint; a nominal gutter connected to the downpipe joint via the first elbow; a second elbow connected to the nominal gutter; and a downspout connected via two elbows, wherein the downspout has a length of 2.0 m or more.
Further, in the rain gutter according to the present invention, the first elbow and the second elbow have receptacles provided at both ends of the curved pipe portion, and a cross section including the pipe axes of the first and second elbows is provided. It is preferable that the radius of curvature of the inner wall surface on the inner peripheral side of the bent tube portion when the bent tube portion is at least larger than 64 mm and smaller than 125 mm.
Further, in the rain gutter according to the present invention, it is preferable that the length of the nominal gutter is 0 m or more and 2.0 m or less.

Further, a drainage member according to the present invention is a drainage member provided in a rain gutter including an eaves gutter and a downspout connected to a drop opening forming an opening on the bottom side of the eaves gutter, a cover member that is installed inside the eaves gutter at a position spaced upward from the bottom surface and that forms an inflow opening between the eaves gutter and the bottom surface for allowing rainwater in the eaves gutter to flow into the drain, The lid member is arranged to close the opening of the drop opening when viewed from above in the vertical direction, and the projected area of the lid member with respect to a plane orthogonal to the vertical direction is larger than the projected area of the opening of the drop opening. It is set at a height of 10 to 50 mm above the bottom surface, and the area of the inflow opening is larger than the opening area of the drop opening.

In the present invention, by setting the position of the lid member so that the height of the lid member is 10 to 50 mm above the bottom surface of the eaves gutter, as well as closing the opening of the drop opening when viewed from above in the vertical direction, a large amount of water can be collected during heavy rain. Even when rainwater flows in from the inflow opening, the downspout is filled with water without sucking air and is water-sealed. Therefore, a siphon phenomenon can be generated in the downpipe, and clogging of foreign matter such as fallen leaves can be prevented, resulting in excellent siphon performance.
In other words, if the height of the lid member from the bottom of the eaves gutter is less than 10 mm, foreign matter such as fallen leaves easily clogs the inflow opening, and the inflow opening area becomes small. I can't. In addition, if the height of the cover member from the bottom of the eaves gutter exceeds 50 mm, the water level of the rainwater required for siphoning will rise too much, and air will be easily sucked in, making it difficult for siphoning to occur. Decreased performance. Therefore, it is preferable to set the height of the lid member as described above within a range of 10 to 50 mm.

Further, in the present invention, the lid member having a larger projected area than the projected area of the opening of the trough is set at a predetermined height from the bottom surface of the eaves gutter. Therefore, the cover member is attached from the upper side of the eaves gutter, and the work on the lower side of the eaves gutter can be reduced, and the labor and time required for attaching and detaching the cover member can be reduced. Moreover, the siphon performance can be adjusted by changing the height from the bottom of the lid member according to the shape of the eaves gutter (bottom width) and the opening area of the drop opening, so variations in the lid member can be kept to a minimum. , the cost can be reduced.

Further, in the drainage member according to the present invention, it is preferable that the lid diameter or the minimum width dimension of the lid member is larger than the outer diameter of the opening of the drop opening and is 245% or less of the outer diameter of the opening.

In this case, the water flow of rainwater flowing in from the inflow opening formed on the lower surface side of the lid member is in a more stable state, the water level in the eaves gutter is also stabilized, and a siphon can be reliably generated. Drainage performance can be improved. In particular, when the lid diameter or the minimum width of the lid member exceeds 245% of the outer diameter of the opening of the drop opening, most of the rainwater that is about to flow into the inflow opening collides with the lid member, causing the water level to rise. will occur. Therefore, it is preferable that the lid diameter or the minimum width dimension of the lid member as described above is larger than the outer diameter of the opening of the drop opening and is within a range of 245% or less of the outer diameter of the opening.

Further, in the drainage member according to the present invention, it is more preferable that the lid member has a height of 30 to 40 mm above the bottom surface.

In this case, by setting the height of the lid member in the range of 30 to 40 mm above the bottom surface, the rainwater flowing in from the inflow opening formed on the lower surface side of the lid member is in a more stable state. As a result, the water level in the eaves gutter is stabilized, and the siphon can be reliably generated, so that the drainage performance can be improved.

Further, in the drainage member according to the present invention, it is more preferable that the lid diameter or the minimum width dimension of the lid member is 150 to 200% of the outer diameter of the opening of the drop opening.

In this case, by setting the lid diameter or the minimum width dimension of the lid member in the range of 150 to 200% of the outer diameter of the opening of the drop opening, the rainwater flowing in from the inflow opening formed on the lower surface side of the lid member. The water flow in the eaves becomes more stable, the water level in the eaves gutter is stabilized, and the siphon can be reliably generated, so that the drainage performance can be improved.

Further, the drainage member according to the present invention includes the lid member formed in a plate shape, a mounting cylinder having the drop opening portion and fitted to the downspout, and the lid member and the mounting cylinder. longitudinal ribs connected to each other and arranged at intervals in the circumferential direction at positions that do not overlap the opening of the drop opening when viewed from above in the vertical direction; An inflow opening is preferably formed.

In this case, the lid member can be arranged at a predetermined position by fitting the mounting cylinder integrally provided with the lid member via the vertical ribs to the downpipe. An inflow opening of a suitable size is formed between the bottom surface of the eaves gutter and the installation work of the drainage member can be easily performed. Moreover, in the drainage member according to the present invention, since the vertical ribs are provided at the inflow opening for allowing rainwater to flow into the outlet, the vertical ribs can have a rectifying effect, and the rainwater flows into the air. Inhalation can be suppressed more reliably.

Further, in the drainage member according to the present invention, a guiding guide is formed on the lower surface of the lid member, and the guiding guide is formed with a curved portion that gradually extends downward toward the center of the lid in a plan view. It is preferable that the curved portion guides rainwater that has flowed in from an opening toward the drop opening.

In this case, the rainwater that has flowed in from the inflow opening is guided by the curved portion of the guidance guide and guided toward the drop opening, so that it is possible to more reliably suppress rainwater from sucking air.

ADVANTAGE OF THE INVENTION According to the drainage member of this invention, cost can be held down and it can exhibit the outstanding siphon performance by the simple structure excellent in workability.

It is a figure which shows schematic structure of the rain gutter provided with the siphon drain member by embodiment of this invention. FIG. 2 is a diagram showing in more detail the schematic configuration of the rain gutter shown in FIG. 1; Figure 3 is a cross-sectional view of the elbow shown in Figure 2; It is the perspective view which looked at the state which attached the siphon drain member in the eaves gutter from diagonally upward. FIG. 3 is a partially broken perspective view showing the configuration of a siphon drain member; It is the figure which looked at the siphon drain member shown in FIG. 4 from the longitudinal direction of the eaves gutter. 7 is a diagram showing a state before the siphon drain member shown in FIG. 6 is attached to the eaves gutter. FIG. FIG. 7 is a top plan view of the siphon drain member installed in the eaves gutter shown in FIG. 6 ; (a), (b), and (c) are sectional views for explaining the siphon performance at the position of the lid member of the siphon drain member. 1 is a side view of an experimental device according to a first embodiment; FIG. 9 is a graph showing experimental results according to the second example; FIG. 5 is a perspective view of a state in which a siphon drain member is attached in the funnel according to the first modified example, as viewed obliquely from above, and is a view corresponding to FIG. 4 ; 13 is a cross-sectional view taken along the line BB shown in FIG. 12; FIG. 14 is a diagram showing a state before the siphon drain member shown in FIG. 13 is attached to the eaves gutter. FIG. It is the perspective view which looked at the structure of the cover member by the 2nd modification from the diagonally downward direction, and which was partially broken. It is the perspective view which looked at the structure of the cover member by the 2nd modification from diagonally upwards, and which was partially broken. It is a side view of the state which attached the cover member by the 2nd modification to the eaves gutter. It is a figure which shows the state before attaching the cover member shown in FIG. 6 to an eaves gutter. FIG. 11 is a perspective view showing the configuration of a lid member according to a third modified example; FIG. 20 is an exploded perspective view of the lid member shown in FIG. 19; It is a side view of the state which attached the cover member by the 4th modification to the eaves gutter. FIG. 11 is a cross-sectional view showing a state where a cover member is arranged on a funnel according to a fifth modified example; FIG. 11 is a cross-sectional view showing a state where a cover member is arranged on a funnel according to a sixth modified example; FIG. 21 is a cross-sectional view showing a state where a lid member is arranged on a funnel according to a seventh modified example;

BEST MODE FOR CARRYING OUT THE INVENTION A drainage member according to an embodiment of the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 1, the siphon drain member 2 (drainage member) according to the present embodiment has a high drainage function. It is provided inside a large eaves gutter 10 arranged at the edge of the eaves.

The rain gutter 1, as shown in FIG. have. The call gutter 12 horizontally guides the rainwater W flowing down from the siphon drain member 2 provided in the eaves gutter 10, and one end of the eaves gutter 10 is connected to the lower surface 10c of the eaves gutter 10 via the downspout joint 13 by the first elbow 12A. The other end side is connected to the upper end of the downpipe 11 by the second elbow 12B. In such a rain gutter 1, a downspout 11 is arranged in the vertical direction along the outer wall P of the building, and the lower end of the downspout 11 is connected to a drainage pipe (not shown) buried in the ground. Rainwater flowing down from the edge of the eaves is received by an eaves gutter 10, overflowed upward, and drained to the drain pipe side through a call gutter 12 and a vertical gutter 11.例文帳に追加
Here, in FIGS. 1 and 4, the right side of the paper surface is the building side. In the rain gutter 1, the building side is referred to as the rear side, and the side away from the building is referred to as the front side.

The eaves gutter 10 is an extruded product of hard vinyl chloride resin, ABS, AES, or other synthetic resin. A hollow rear wall 16 is formed with an upright grooved cross-section. The eaves gutter 10 is suspended by a gutter hanger (not shown) attached to a fascia plate (not shown) to receive rainwater flowing down from the eaves of the roof.
In order to prevent expansion and contraction due to heat, the eaves gutter 10 preferably has a coefficient of linear expansion of 2.0×10 ⁻⁵ /° C. or less. The linear expansion coefficient can be reduced by inserting a low-stretch sheet such as an iron sheet, or by blending a low-stretch additive such as wollastonite or carbon fiber into the synthetic resin itself that constitutes the eaves gutter 10. can. In addition, it is not limited to a synthetic resin, and may be a metal extruded product.
The eaves gutter 10 has a bottom width of 100 mm or more and 200 mm or less and a height of 90 mm or more and 150 mm or less. It is said that

The first elbow 12A is a joint installed downstream of the siphon drain member 2 . As shown in FIG. 2, at the water collecting port 6 on the downstream side (that is, the side where rainwater collects) of the eaves gutter 10 provided with the siphon drain member 2, one first receptacle (one end) 60A of the first elbow 12A is provided. is connected.

As shown in FIG. 3, the first elbow 12A includes a bent pipe portion 121 and sockets 60A and 60B provided at both ends of the bent pipe portion 121. As shown in FIG. The bent tube portion 121 bends at approximately 90° in a side view.

The radius of curvature r1 of the inner wall surface 122 and the radius of curvature r2 of the outer wall surface 123 on the inner peripheral side of the curved tube portion 121 when viewed in a cross section (plane, paper surface of FIG. 3) including the tube axis 6C of the curved tube portion 121 are At least greater than 64 mm and less than 125 mm. Considering that the flow speed of the rainwater W flowing from the first inlet 60A is not reduced and the rainwater W flows more smoothly, the curvature radii r1 and r2 are set to be larger than 64 mm from the viewpoint of accommodation and transportation. , and preferably smaller than 90 mm, and from the viewpoint of drainage performance, preferably larger than 80 mm and smaller than 100 mm.

As shown in FIG. 2, the upstream end 12a of the trough 12 is connected to the second receptacle 60B of the first elbow 12A. The trough 12 is a member that laterally pulls rainwater W that has flowed down the first elbow 12A, and extends along the front-rear direction D2, or extends so that the separation in the front-rear direction D2 increases as it progresses downstream. It is a straight pipe. The length from the upstream end 12a to the downstream end 12b of the trough 12 (nominal trough length F1) is greater than 0 m and 2.0 m or less, preferably 0.6 m or more and 1.5 m or less, and 0.5 m or less. 6 m or more and 1.0 m or less is more preferable. Since the nominal gutter length F1 is within the range described above, the rainwater flowing down from the first elbow 12A smoothly flows down in a full state.

A first receptacle 60A of the second elbow 12B is connected to the downstream end 12b of the trough 12. As shown in FIG. The second elbow 12B has the same configuration as the first elbow 12A.

The upper end portion 11a of the downspout 11 is connected to the second receptacle 60B of the second elbow 12B. The downspout 11 is a member that vertically pulls rainwater W flowing down the second elbow 12B, and is a straight pipe that extends along the vertical direction D3 (the vertical direction and the opposite direction). A lower end portion 11b of the downpipe 11 is connected to the ground G and connected to a well-known water collecting mass 80 buried in the ground. The catchment trough 80 is connected to a drainage structure, such as a sewage pipe 82 , via a connecting pipe 81 . The catchment trough 80 has a width greater than that of the downspout 11 .

The length from the upper end portion 11a to the lower end portion 11b of the downspout 11 (downspout length F2) is 2.0 m or longer, preferably 3.0 m or longer, and more preferably 4.0 m or longer. The siphon phenomenon in the downpipe 11 is favorably generated and maintained by keeping the downpipe length F2 within the aforementioned range.
As the vertical gutter length F2 increases, the amount of rainwater W flowing down to the lower end portion 11b increases, and the rainwater W flows into the water collecting basin 80 with great force.

The siphon drain member 2 shown in FIG. 4 is a drainage member having a high drainage function for improving the drainage capacity of rainwater W (see FIG. 1) that has flowed into the eaves gutter 10 during heavy rain. As shown in FIGS. 5 to 7, the siphon drain member 2 has a plate-shaped cover member 21 and a drop opening 20 for the downspout 11 (more precisely, the downspout 12 above the downspout 11). ), the cover member 21 and the mounting cylinder 22 are connected to each other, and a plurality of vertical ribs 23 are arranged at intervals in the circumferential direction so as not to overlap the drop opening 20 when viewed from above. and have.
In this embodiment, the siphon drain member 2 is an injection-molded product of synthetic resin such as rigid vinyl chloride resin, polycarbonate, ABS, and AES. It should be noted that the material is not limited to synthetic resin, and may be made of cast iron using a mold.

Here, in the present embodiment, the cover member 21 is formed in a disc shape, and the mounting cylinder 22 is formed in a cylindrical shape, and their respective central axes are arranged on a common axis and coincide with each other in the vertical direction. . Hereinafter, this common axis will be referred to as a drain axis O, the mounting cylinder 22 side of the siphon drain member 2 along the direction of the drain axis O will be referred to as the lower side, and the lid member 21 side will be referred to as the upper side. In a plan view of the siphon drain member 2 in the direction of the drain axis O, the direction orthogonal to the drain axis O is called the radial direction, and the direction rotating around the drain axis O is called the circumferential direction.

The mounting cylinder 22 has a cylinder portion 22A forming the drop opening portion 20, and a plate-like collar portion 22B extending radially outward from the upper end of the cylinder portion 22A. Here, the opening outer diameter R1 of the drop opening portion 20 corresponds to the inner diameter of the cylinder portion 22A, and the opening area A1 of the drop opening portion 20 corresponds to the inner diameter of the cylinder portion 22A (opening outer diameter R1 of the drop opening portion 20). equivalent to the area In the present embodiment, the opening area A1 is 20 cm ² or more and 300 cm ² or less, preferably 30 cm ^{2 or} more and 190 cm ² or less, and more preferably 40 cm ² or more and 100 cm ^{2 or} less.
In the present embodiment, since the drain axis O corresponding to the central axis of the siphon drain member 2 is aligned in the vertical direction, the lid area A2 of the lid member 21 and the opening area A1 of the drop opening 20 are respectively It corresponds to the projected area of the lid member 21 and the projected area of the opening of the drop opening 20 with respect to a plane perpendicular to the vertical direction.

In the mounting cylinder 22, a connection portion 22a on the inner surface side where the cylinder portion 22A corresponding to the drop opening portion 20 and the flange portion 22B are continuously provided has a bell mouth shape formed with a tapered surface or a curved surface. . If the connecting portion 22a on the inner surface side is a curved surface, the radius of curvature of the cross section in the direction parallel to the drain axis O is preferably 5 mm to 20 mm.
The tubular portion 22A penetrates the through hole 10b (see FIG. 7) of the eaves gutter 10 from above and is arranged in a state of being inserted inside the downpipe joint 13. As shown in FIG.
A male thread (not shown) may be formed on the outer peripheral surface of the cylindrical portion 22A. In this case, by rotating the mounting cylinder 22, the external thread of the cylindrical portion 22A can be screwed into the internal thread (not shown) formed on the inner surface of the downpipe joint 13 and tightened.

The collar portion 22B has a stepped portion 22b that is thinly notched over the entire circumference on the lower surface on the outer peripheral side. . In the present embodiment, the outer diameters of the flange portion 22B and the lid member 21 are substantially the same.
A portion formed between the outer peripheral edge 21a of the lid member 21 and the outer peripheral edge 22c of the brim portion 22B serves as an inflow opening 2A through which the rainwater W accumulated in the eaves gutter 10 flows into the opening of the drop opening portion 20. . The inflow opening 2A is between the outer peripheral edge 21a of the lid member 21 and the bottom surface 10a of the eaves gutter 10, or between the flange 22B of the mounting cylinder 22 in the direction orthogonal to the horizontal plane. For example, when the outer peripheral edge 21a of the lid member 21 is larger than the outer peripheral edge 22c of the brim portion 22B of the mounting cylinder 22, the inflow opening 2A is formed between the outer peripheral edge 21a of the lid member 21 and the bottom surface 10a of the eaves gutter 10. When the outer peripheral edge 21a of the lid member 21 is smaller than the outer peripheral edge 22c of the collar portion 22B of the mounting cylinder 22, the inflow opening 2A is formed between the outer peripheral edge 21a of the lid member 21 and the upper surface 22d of the collar portion 22B of the mounting cylinder 22. It becomes the part formed in between.
The size, height, and shape of the lid member 21, which will be described later, are adjusted so that the area of the inflow opening 2A is larger than the opening area A1 of the drop opening 20 described above. In the present embodiment, the area of the inflow opening 2A can be obtained by multiplying the circumference of the circular lid member 21, ie, the length of the outer peripheral edge 21a, with the height H of the lid member 21, which will be described later.

The plurality of vertical ribs 23 connect the upper surface 22d of the collar portion 22B of the mounting cylinder 22 and the outer peripheral portion of the lower surface 21c of the lid member 21, as shown in FIG. That is, the cover member 21 is supported from below by a plurality of vertical ribs 23, 23, . . . These longitudinal ribs 23 are provided in the inflow opening 2A, cross the radial direction in plan view, and are formed to be curved. In other words, the vertical ribs 23 have the function of rectifying the rainwater W that flows from the inflow opening 2A into the drop opening 20. As shown in FIG.

The lid member 21 is supported by the mounting cylinder 22 while being supported from below by the plurality of vertical ribs 23, 23, . . . as described above. The lid member 21 is arranged inside the eaves gutter 10 as described above, is installed at a position spaced upward from the drop opening 20, and is dropped onto the bottom surface 10a of the eaves gutter 10 below the lid member 21. An inflow opening 2A for allowing rainwater W to flow into the mouth portion 20 is formed.

Lid member 21 is arranged so as to close the opening of drop opening 20 when viewed from above in the vertical direction, and lid area A2 shown in FIG. 8 is larger than opening area A1 of drop opening 20 (see FIG. 5). is set.
In the present embodiment, the center of the lid member 21 and the center of the opening of the drop opening 20 are aligned in the vertical direction. In this case, if the lid area A2 is the same as the opening area A1 of the drop opening 20, the opening of the drop opening 20 cannot be closed when viewed from the vertical direction, and the lid member 21 and the drop opening cannot be closed. A gap for air to enter (an air core due to a vortex flow) will be generated between 20 . Therefore, it is preferable that the projected area of the lid member 21 with respect to a plane perpendicular to the vertical direction is set larger than the projected area of the opening of the drop opening 20 .

The lid member 21 is positioned at a height H of 10 to 50 mm upward from the bottom surface 10a of the eaves gutter 10. As shown in FIG. The lid member 21 preferably has a lid diameter R2 larger than the outer diameter R1 of the opening of the drop opening 20 and set to 245% or less of the outer diameter R1 of the opening. When the opening outer diameter R1 is 75 mm, a good water level can be maintained in the eaves gutter 10 if the lid diameter R2 is 185 mm or less (that is, 185 mm/75 mm≈245%). If the lid diameter R2 of the lid member 21 exceeds 245% of the outer diameter R1 of the opening of the drop port 20, most of the rainwater that is about to flow into the inflow opening collides with the lid member and the water level rises. occur.
For example, when the opening outer diameter R1 of the drop opening 20 is 75 mm, the lid diameter R2 of the lid member 21 may be more than 75 mm and 185 mm or less.
The height H may be within the range of 10 to 50 mm even if the lid member 21 is tilted and the height is not constant.

Furthermore, the height H of the lid member 21 is set at a position 30 to 40 mm above the bottom surface 10a of the eaves gutter 10, and the lid diameter R2 is set to 150 to 200% of the opening outer diameter R1 of the drop opening 20. more preferably.
If the lid diameter R2 is smaller than 150% of the opening outer diameter R1 of the drop opening 20, the water level in the eaves gutter 10 will be lower than the lid member 21, and there is a risk that the lid member 21 will not come into contact with the inflowing water. be. Also, if it exceeds 200%, the ratio of the water flow that flows in from the inflow opening collides with the lid member 21 increases, and the water level in the eaves gutter 10 becomes too high than the lid member 21, which may reduce the siphon performance. have a nature.
By making it 150% or more, even when the entire eaves gutter 10 is tilted forward or backward, the opening of the drop opening 20 can be reliably closed. By setting it to 200% or less, the fit becomes small, and it is possible to prevent the increase in size of joints and supports.

Since the water level in the eaves gutter 10 must be higher than the inflow opening 2A for the siphon action to occur, the height H of the lid member 21 must be lower than the maximum water level in the eaves gutter 10. In order to generate a stable siphon action, the height H of the lid member 21 is preferably 0.1 to 0.5 times the maximum water level in the eaves gutter 10, and is preferably 0.2 to 0.45. More preferably double height.
The maximum water level in the eaves gutter 10 is the height of the front wall 15 or the rear wall 16 of the eaves gutter, whichever is lower from the bottom surface 14 . In addition, when the lid member 21 is tilted and the height is not constant, the maximum height of the height H of the lid member 21 is 0.1 to 0.5 times the maximum water level in the eaves gutter 10. It should be the height.

Further, the opening outer diameter R1 of the drop opening portion 20 suitable for providing the lid member 21 set at the position as described above is preferably 50 mm or more and 170 mm or less. That is, by setting the opening outer diameter R1 of the drop port 20 to 50 mm or more, which is the lower limit, it is possible to smoothly drain a large amount of water generated in the siphon generating portion (siphon drain member 2). Further, by setting the upper limit to 170 mm or less, the fitting becomes small, and it is possible to prevent the increase in size of the joint and the support.

As shown in FIGS. 5 and 8, the lid member 21 is provided with gripping ribs 24 that protrude upward from the upper surface 21b and are arranged at intervals in the circumferential direction. By gripping the gripping rib 24, the siphon drain member 2 can be easily rotated when tightened. The gripping rib 24 is composed of a rib body 24A extending in the circumferential direction and extension portions 24B projecting outward from both ends of the rib body 24A. For example, when the siphon drain member 2 is attached to the downpipe joint 13, for example, a rod-shaped member is engaged between the gripping ribs 24, 24 adjacent in the circumferential direction, and the rod-shaped member is rotated to tighten. can enter. In addition, since a gap is formed between the gripping ribs 24, 24, debris such as fallen leaves in the eaves gutter 10 can easily pass through and can be prevented from being entangled.

As shown in FIGS. 5 to 7, the lid member 21 is provided with a plurality of guides 25 having curves extending gradually downward toward the drain axis O (the center of the lid) at the central portion of the lower surface 21c in plan view. They are provided radially extending from the axis O in the radial direction. The guidance guide 25 is for guiding the rainwater W in the eaves gutter 10 from the inflow opening 2A to the drop opening (opening of the drop opening portion 20).

Next, the procedure for assembling the rain gutter 1 (the eaves gutter 10, the downspout 11, and the siphon drain member 2) having the siphon drain member 2 described above will be specifically described.
First, as shown in FIG. 7, a through hole 10b is made in the bottom wall 14 of the eaves gutter 10 at the position where the siphon drain member 2 is to be attached. Subsequently, the siphon drain member 2 is inserted into the eaves gutter 10, the cylindrical portion 22A of the mounting cylinder 22 is inserted from the through hole 10b of the eaves gutter 10 to project downward, and the stepped portion of the flange portion 22B of the mounting cylinder 22 is 22b is locked and fixed to the periphery of the through hole 10b of the bottom surface 10a of the eaves gutter 10 by interposing a packing or the like. As a result, as shown in FIG. 6, the siphon drain member 2 is arranged at a predetermined position in the eaves gutter 10, and the lid member 21 is also held at a predetermined height H with respect to the opening 20. Fixed.

Subsequently, after connecting the downpipe joint 13 to the cylindrical portion 22A protruding downward from the through hole 10b of the eaves gutter 10, as shown in FIG. After that, the downspout 11 is connected to the second elbow 12B at one end of the downspout 12. The downspouts 11 are connected using joints in an appropriate number according to the distance to the above-described underground drainage pipes.

In the rain gutter 1 assembled in this way, rain falling on the roof flows into the siphon drain member 2 provided in the eaves gutter 10 from the inflow opening 2A, passes through the drop opening 20, and flows through the gutter 12. It flows down to the downpipe 11. The rainwater W that has flowed into the downpipe 11 from the downpipe 12 flows down to a drainage pipe (not shown) buried underground. At this time, since the downstream side of the siphon drain member 2 of the downspout 11 is filled with water and sealed, the inside of the downspout 11 is filled with water and flows down. A siphon phenomenon is caused in the downpipe 11, and the water is drained vigorously from the downpipe 11 to the drain pipe side.

As a procedure for assembling the rain gutter 1 of the present embodiment, as described above, the siphon drain member 2 is first fixed to a predetermined position of the eaves gutter 10, and then the call gutter 12 and the downspout 11 are provided. is an example, for example, after assembling the downspout 11 and the downspout 12 in advance, the siphon drain member 2 is attached to the downspout joint 13 connected to the downspout 12. is also possible.

Next, the action of the siphon drain member 2 described above will be described in detail with reference to the drawings. In this embodiment, as shown in FIG. 5, the opening of the drop opening 20 is closed when viewed from above in the vertical direction, and as shown in FIG. By setting the position of the cover member 21 of the siphon drain member 2 so as to have a height of ~50 mm, even when a large amount of rainwater flows in from the inflow opening during heavy rain, the downpipe 11 is fully filled without inhaling air. It becomes water sealed. Therefore, a siphon phenomenon can be generated in the downpipe 11, and clogging of foreign matter such as fallen leaves can be prevented, so excellent siphon performance can be obtained.

That is, when the height H of the lid member 21 from the bottom surface 10a of the eaves gutter 10 is smaller than 10 mm, as shown in FIG. Since the area of the inflow opening 2A becomes small, a desired drainage flow rate cannot be ensured. Further, as shown in FIG. 9(b), if the height H of the lid member 21 from the bottom surface 10a of the eaves gutter 10 exceeds 50 mm, the water level of the rainwater W necessary for siphoning will rise too much. , air is easily sucked in, making it difficult for siphons to occur and the drainage performance to deteriorate. Therefore, the height of the lid member 21 as described above is preferably in the range of 10 to 50 mm, more preferably in the range of 30 to 40 mm.
Here, the relationship between the height H of the lid member 21 and the diameter of the drop opening portion 20 (opening outer diameter R1) is preferably R1/H=1.0 to 16.0, more preferably 1.3. ~8.0, most preferably between 1.5 and ~5.5. A siphon can be generated reliably by setting it as such a range.

Further, in the present embodiment, as shown in FIG. 5, the lid member 21 having a lid area A2 (see FIG. 8) larger than the opening area A1 of the drop opening 20 is mounted at a predetermined height from the bottom surface 10a of the eaves gutter 10. It is configured to be set at the position of height H. Therefore, the lid member 21 is attached from the upper side of the eaves gutter 10, and the work on the lower surface 10c (see FIG. 1) side of the eaves gutter 10 can be reduced, and the labor and time required for attaching and removing the lid member 21. can be reduced.
Moreover, by changing the height H of the lid member 21 from the bottom surface 10a according to the shape (bottom width) of the eaves gutter 10 and the opening area A1 of the drop opening 20, the siphon performance can be adjusted. Variations can be kept to a minimum, and cost can be reduced.

Further, as in the present embodiment, the lid diameter R2 of the lid member 21 is larger than the outer diameter R1 of the opening of the drop opening 20 and is set to 245% or less of the outer diameter R1 of the opening. The water flow of the rainwater W flowing in from the inflow opening 2A formed on the lower surface 21c side becomes more stable, the water level in the eaves gutter 10 is also stabilized, and the siphon can be reliably generated, so that the drainage performance is enhanced. be able to. In particular, when the lid diameter R2 or the minimum width dimension of the lid member 21 exceeds 245% of the opening outer diameter R1 of the drop opening 20, most of the rainwater W trying to flow into the inflow opening 2A collides with the lid member 21. This will cause the water level to rise. Therefore, it is preferable that the lid diameter R2 of the lid member 21 as described above is larger than the opening outer diameter R1 of the drop opening portion 20 and is within a range of 245% or less of the opening outer diameter R1. Also, the minimum outer diameter of the lid diameter R2 of the lid member 21 is larger than the opening outer diameter R1 of the drop opening portion 20, and the outer circumference length of the lid diameter R2 is equal to or more than 245% or less than the outer circumference length of the opening outer diameter R1. good too.

In addition, in the siphon drain member 2 of the present embodiment, by setting the height H of the lid member 21 in the range of 30 to 40 mm above the bottom surface 10a, the inflow is formed on the lower surface 21c side of the lid member 21. The water flow of the rainwater W flowing in from the opening 2A becomes more stable, the water level in the eaves gutter 10 is also stabilized, and the siphon can be reliably generated, so that the drainage performance can be enhanced.

In addition, in the siphon drain member 2 of the present embodiment, by setting the lid diameter R2 of the lid member 21 within a range of 150 to 200% of the opening outer diameter R1 of the drop opening portion 20, the lower surface 21c side of the lid member 21 The water flow of rainwater W flowing in from the formed inflow opening 2A becomes more stable, the water level in the eaves gutter 10 is also stabilized, and a siphon can be reliably generated, so that drainage performance can be enhanced.

Further, in the siphon drain member 2 of the present embodiment, the mounting cylinder 22 integrally provided with the cover member 21 via the vertical rib 23 is fitted to the downpipe joint 13 provided on the downpipe 11. , the lid member 21 can be arranged at a predetermined position. An inflow opening 2A having a suitable size is formed between the bottom surface 21c of the lid member 21 and the bottom surface 10a of the eaves gutter 10, and the siphon drain member 2 can be easily attached. Moreover, in the siphon drain member 2 of the present embodiment, the vertical ribs 23 are provided in the inflow opening 2A portion for allowing the rainwater W to flow into the outlet, so that the vertical ribs 23 can have a rectifying effect. , and the intake of air by the rainwater W can be more reliably suppressed.

In addition, in the present embodiment, the rainwater W flowing in from the inflow opening 2A is guided by the curved portion of the guiding guide 25 and guided toward the opening of the drop opening portion 20, thereby preventing the rainwater W from sucking air. It can be suppressed more reliably.

As described above, in the present embodiment, it is possible to suppress the cost, to exhibit excellent siphon performance with a simple structure excellent in workability.

Next, an example carried out to prove the effect of the drainage member according to the embodiment described above will be described below.

(First embodiment)
In the first example, the lid member 21 corresponding to the lid member 21 of the above embodiment is used, and the height of the lid member 21 from the bottom surface 31a of the eaves gutter 31 and the diameter of the lid member 21 are changed. An experiment was conducted to generate a siphon, and the state of drainage was confirmed.

FIG. 10 shows the experimental apparatus used in the first example. The lid member 30 uses a disk-shaped one, and is suspended and supported so that the height can be changed using a bolt member 33 supported downward from a hanging tool 32 fixed to the ear portion 31b of the eaves gutter 31. ing. In other words, the height of the lid member 30 suspended and supported by the hanging tool 32 from the bottom surface 31a of the eaves gutter 31 can be changed, and the experiment was conducted by changing the height to five levels as described below. Further, similarly to the above-described embodiment, the lid member 30 was arranged so as to block the opening of the drop opening portion 34 inside the downpipe joint 36 in all of the following 18 experiments when viewed from above, and the lid member 30 The lid diameter R2 of the drop opening 34 is larger than the opening outer diameter R1 (set to 75 mm and 100 mm). In addition, in FIG. 10, a downspout is connected to the downstream side of the elbow 35 .
Table 1 shows the experimental conditions and experimental results for the opening outer diameter R1 of 75 mm in the first embodiment. Table 2 shows the experimental conditions and experimental results when the opening outer diameter R1 is 100 mm in the first embodiment.

As shown in Tables 1 and 2, the experiment was conducted on 18 cases (cases 1 to 18) in which the bottom width (mm) of the eaves gutter 31 and the lid diameter (mm) of the lid member 30 were changed.
When the opening outer diameter R1 shown in Table 1 is 75 mm, three types of eaves gutters 31 with bottom widths of 120 mm, 150 mm, and 200 mm are used, and three cases with bottom widths of 120 mm and lid diameters of 70 mm, 80 mm, and 95 mm are used. There were two cases with a bottom width of 150 mm and lid diameters of 110 mm and 125 mm, and five cases with a bottom width of 200 mm and lid diameters of 140 mm, 155 mm, 170 mm, 185 mm and 195 mm.
When the opening outer diameter R1 shown in Table 2 is 100 mm, two types of eaves gutters 31 with bottom widths of 150 mm and 200 mm are used, and three cases with bottom widths of 150 mm and lid diameters of 90 mm, 105 mm, and 120 mm are used, There were five cases with a bottom width of 200 mm and lid diameters of 135 mm, 150 mm, 165 mm, 180 mm and 195 mm.
The right column of Tables 1 and 2 shows the ratio (%) of the lid diameter R2 to the opening outer diameter R1 in each case.

In the experiments in the above 18 cases, the height H of the lid member 30 from the bottom surface 31a of the eaves gutter 31 was changed in seven steps of 5 mm, 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, and 60 mm, and the eaves gutter 31 On the other hand, when the opening outer diameter R1 is 75 mm, the flow rate is 6 liters/sec (equivalent to rainfall of 100 mm/h), and when the opening outer diameter R1 is 100 mm, the flow rate is 18 liters/sec (equivalent to rainfall of 300 mm/h). ), and the water level was measured at a position 150 mm from the center of the opening of the drop opening 34 in the extending direction of the eaves gutter 31, and the state of the siphon phenomenon was visually confirmed in each experiment.
In addition, the lower column in Tables 1 and 2 shows the ratio of the opening outer diameter R1 to the height H from the bottom surface of the lid member at the height H from the bottom surface 31a of the eaves gutter 31 of each lid member 30. there is

As shown in Tables 1 and 2, as a result of the experiment, it was found that the siphon phenomenon occurred in all the cases 1 to 18 where the height H of the cover member 30 was changed (at a height of 5 to 60 mm). It could be confirmed.
At this time, the lid diameter of the lid member 30 is larger than the opening outer diameter (75 mm) of the drop opening portion 34 and 185 mm or less (245% or less of the opening outer diameter) in cases 2 to 9 having an opening outer diameter R1 of 75 mm. In cases 12 to 18 with an opening outer diameter R1 of 100 mm, it was confirmed that the range was larger than the opening outer diameter (100 mm) of the drop opening 34 and was 195 mm or less (245% or less of the opening outer diameter). .

In Tables 1 and 2, it was confirmed that the water level was kept low in the range surrounded by the dashed line because the height of the lid member 30 and the diameter of the lid were well balanced. In particular, in the area surrounded by the thick line, as shown in FIG. 9A, the water flow flowing into the inflow opening, the height of the lid member 30, and the diameter of the lid are well balanced, so the water level is kept low, and a good siphon is obtained. It was confirmed that this phenomenon occurred.
On the other hand, when the height of the lid member 30 is large (more than 40 mm in this experiment) and the lid diameter is small (less than 95 mm in this experiment), as shown in FIG. It was confirmed that the water level inside becomes lower than that of the lid member 30, and the siphon action may be less likely to occur.
When the height of the lid member 30 is small (less than 30 mm in this experiment) and the diameter of the lid is large (more than 155 mm in this experiment), as shown in FIG. It was confirmed that there is a possibility that the inflowing water flow collides with the lid member 30 at a higher rate, which disturbs the water flow and deteriorates the siphon performance, and that the opening area is small, resulting in a low flow rate.

Thus, it was found that the lower the height H of the lid member 30 from the bottom surface 31a and the larger the lid diameter, the earlier the siphon phenomenon starts. Preferably, as indicated by the preferred range surrounded by the dashed lines in Tables 1 and 2, the height H of the lid member 30 is 20 to 50 mm, and the lid diameter of the lid member 30 is 95 to 185 mm. It was confirmed that the range was 120 to 250% (95/75 to 185/75) of the outer diameter of the opening of the drop opening portion 34 . More preferably, the height H of the lid member 30 is 30 to 40 mm, and the lid diameter of the lid member 30 is in the range of 110 to 155 mm, as indicated by the most suitable ranges surrounded by thick lines in Tables 1 and 2. As a result, it was confirmed that the outer diameter of the opening of the drop opening 34 was 150 to 200% (110/75 to 155/75) or 120 to 150 (120/100 to 150/100).

(Second embodiment)
In the second example, the superiority of the shape of the siphon drain member 2 of the above-described embodiment was confirmed through experiments.
That is, in the second embodiment, as shown in Table 3, 15 types of different-shaped drainage member cases (A, B, C, D, E, G, H, T, V, F, S, W, X, existing), an eaves gutter with a bottom width of 150 mm was used, and water flowed through the eaves gutter at a flow rate of 4 liters/sec, 5 liters/sec, and 6 liters/sec (equivalent to rainfall of 100 mm/h), and a drop opening The water level was measured at a position 150 mm from the center of the opening of the eaves in the extension direction of the eaves gutter.

The configuration and shape of the drainage member in each case are as shown in Table 3. Specifically, for each drainage member, the lid diameter (mm), the height of the lid member from the bottom of the eaves gutter (mm), the number of vertical ribs (number of ribs), the rib width of the vertical ribs (mm), the mounting cylinder The radius of curvature (mm) of the connecting portion and the shape of the guiding guide are changed. The rib width is the width in the direction from the center of the lid member toward the outer periphery. In addition, the outer diameter of the opening of the drop opening 34 was set to 75 mm.
In Table 3, a conical guide is denoted as "R", a radial one as in the above embodiment is denoted as "radial", and a guide without an induction guide is denoted as "none". Here, the shape of the case G corresponds to the siphon drain member 2 of the embodiment described above.

FIG. 11 shows the experimental results of the second embodiment, showing the water level (mm) in each case.
As a result of the experiment shown in FIG. 11, it was confirmed that the drainage members of Cases C, D, E, G, H, and T were stable in terms of water level, siphon phenomenon, and drainage performance. On the other hand, in Cases A, B, V, F, S, W, and X, and the existing drainage member, the water level exceeded 40 mm and was in an unstable state. Furthermore, it was confirmed that the drainage member of Case G was comprehensively excellent in the evaluation items described above.

From these results, it was confirmed that the diameter of the lid is preferably 130 mm, and the height of the lid member from the bottom surface of the eaves gutter is preferably 35 mm. Regarding the number of vertical ribs, 6 is preferable, 4 (Case A) is slightly worse, and 8 (Case E) is slightly better. The rib width is preferably 25 mm, and when the rib width is as large as 55 mm as in Case B, the water level is high. Moreover, the radius of curvature of the connecting portion of the mounting cylinder is preferably 15 mm. Furthermore, it has been confirmed that, as for the shape of the guiding guide, a radial shape as in Case G is advantageous in reducing noise, preventing swirl, and preventing water pooling.

Although the embodiments of the drainage member according to the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be modified as appropriate without departing from the scope of the invention.

For example, as in the first modification shown in FIGS. 12 to 14, the siphon drain member 2 is provided on the bottom surface 10a of the funnel 10A connecting the ends of the eaves gutters 10, 10 extending in the extension direction while facing each other. It is also possible to have a configuration with The funnel 10A includes a bottom wall 14A, a front wall 15A, a bottom wall 14A, a front wall 15A, and a bottom wall 14A, a front wall 15A, and a bottom wall 14A, a front wall 15A, and a bottom wall 14A, a front wall 15A, and a bottom wall 14A, a front wall 15A, and a front wall 15A, which are connected to the eaves gutter 10 shown in FIG. It has a rear wall 16A, and a bottom wall 14A is formed with a through hole 10b (see FIG. 14).
In this case also, the siphon drain member 2 is inserted into the funnel 10A, and the cylindrical portion 22A of the mounting cylinder 22 is inserted from the through hole 10b of the funnel 10A to protrude downward. 22b is locked and fixed to the periphery of the through hole 10b of the bottom surface 10a of the funnel 10A with a packing or the like interposed therebetween. As a result, the siphon drain member 2 is arranged at a predetermined position inside the funnel 10A, and the lid member 21 shown in FIG.

In the above-described embodiment, the siphon drain member 2 is attached by fitting the mounting cylinder 22 into the through hole 10b formed in the bottom surface 10a of the eaves gutter 10. Although the position of the lid member 21 (the height H from the bottom surface 10a) is determined, it is not limited to such an installation type with respect to the bottom surface 10a. That is, the lid member is not limited to a drainage member integrally combined with the mounting cylinder 22 and the vertical ribs 23 like the siphon drain member 2 described above, and only the plate-like lid member is an eaves gutter. 10 may be arranged at a height spaced apart from the bottom surface 10a.
In short, the lid member is installed at a position spaced upward from the bottom surface inside the eaves gutter, and is arranged so as to close the opening of the drop opening when viewed from above in the vertical direction, and the lid area is the opening of the drop opening. The lid member is not particularly limited as long as it is set larger than the area and provided at a height of 10 to 50 mm above the bottom surface.

For example, it is also possible to employ a hanging-type lid member 40 (drainage member) according to a second modification shown in FIGS. The cover member 40 is made of a rectangular plate member in a plan view, is arranged inside the eaves gutter 10, and is separated from the mounting cylinder 22 (see FIG. 7) of the embodiment described above. The cover member 40 has side walls 41 extending upward from both ends of the eaves gutter 10 in the width direction. A latching portion 41a is provided to be latched.

The lid member 40 is installed at a position separated upward from the bottom surface 10a of the eaves gutter 10 as shown in FIG. be. An inflow opening 2A is formed between the lower surface 40b of the lid member 40 and the bottom surface 10a to allow the rainwater in the eaves gutter 10 to flow into the outlet. The lid member 40 according to this modification is also arranged so as to close the drop opening 20 of the mounting cylinder 22 shown in FIG. It is set at a height of 10 to 50 mm above the bottom surface 10a.
A plurality of vertical ribs 42 are radially provided on the lower surface 40b of the lid member 40 in a region that does not overlap the opening of the drop opening 20 when viewed from above in the vertical direction.

In addition, although the shape of the cover member in plan view is circular in the above-described embodiment, it is not particularly limited to being circular, and may be square (rectangular) as in the above modified example. However, what is necessary is that the shape be arranged so as to cover the opening of the drop opening when viewed from above in the vertical direction.
For example, in the case of a rectangular cover member, the minimum width dimension of the rectangle is set to be larger than the outer diameter of the opening of the drop opening and not more than 245% of the outer diameter of the opening.

In addition, although the cross-sectional shape of the lid member is flat in the above-described embodiment, it is not particularly limited to being flat, and may be a shape that protrudes upward or a shape that is recessed downward. Alternatively, the shape may include both recesses and protrusions. Furthermore, the degree of protrusion or depression may be gentle or steep. For example, a protruding lid member whose cross-sectional shape has a large upward curvature radius R can prevent rainwater from accumulating on the upper surface of the lid, and the cross-sectional shape has a large downward curvature radius R. The protruding cover member allows rainwater in the eaves gutter to flow smoothly toward the opening of the bottom surface of the eaves gutter.

Furthermore, in this embodiment, the guiding guide 25 is provided on the lower surface 21c of the lid member 21, and the holding rib 24 is provided on the upper surface 21b. It is possible, and the shape is not limited to that of the present embodiment. Furthermore, the shape and quantity of the vertical ribs 23 are not limited to those of this embodiment. For example, as in the experimental apparatus shown in FIG. Also good.

For example, as in a third modification shown in FIGS. 19 and 20, the siphon drain member 2 may be formed by separate members including a lid member 21, a mounting cylinder 22, and vertical ribs 23. . In this case, a vertical rib 23 is fixed to the mounting cylinder 22, and the cover member 21 can be coaxially assembled with a disk-shaped support plate 23a fixed to the upper end of the vertical rib 23. It is Specifically, a through hole 23b is formed in the central portion of the support plate 23a of the vertical rib 23, and a locking projection (not shown) formed on the lower surface of the lid member 21 is inserted into the through hole 23b. It can be assembled by engaging with each other.

Further, as in the fourth modification shown in FIG. 21, the lid member 21 is horizontal while the drip opening portion 20 is tilted, and the projection area Aa of the drip opening portion 20 onto the horizontal plane T is the same as that of the lid member 21 onto the horizontal plane T. It may be made larger than the projected area Ab. In this case, the lid diameter R<b>2 may be the same as the opening outer diameter R<b>1 of the drop opening 20 .

Although the upper surface 21b of the lid member 21 is flat in the present embodiment, it may be formed into a gentle spherical surface with a central portion protruding upward in a plan view, for example. In this case, it is possible to prevent water and foreign matter from accumulating on the upper surface 21b of the lid member 21. FIG.

Further, the shape of the eaves gutter 10, the downpipe 11, the call gutter 12, etc., the dimensions of each part, the configuration of materials, etc. are not limited to the above-described embodiment, and can be set within an appropriate range. For example, although the gully 12 is arranged horizontally, it may be inclined obliquely downward.

For example, the drainage member comprising the lid member of the present invention can be employed in funnels (eaves gutters) different from the above-described embodiments, such as the modified examples shown in FIGS. 22 to 24 .
That is, the first funnel 10B of the fifth modified example shown in FIG. 22 is of a Western-style funnel type in which a first recess 10d recessed downward from the bottom surface 10a is formed. In this case, the lid member 50 is provided directly above the downpipe 11 and at a height H of 10 to 50 mm above the bottom surface 10a where the first recess 10d is not formed.

A second funnel 10C of a sixth modified example shown in FIG. 23 is an eaves cheese type in which a second recessed portion 10e which is recessed downward from the bottom surface 10a and is shallower than the above-described first recessed portion 10d is formed. In this case, the lid member 50 is provided directly above the downpipe 11 and at a height H of 10 to 50 mm above the bottom surface 10a where the second recess 10e is not formed.

A third funnel 10D of a seventh modified example shown in FIG. 24 is formed with a third recess 10f that is recessed downward from the bottom surface 10a and that is deeper than the above-described first recess 10d. The lid member 50 in this case is also provided directly above the downpipe 11 and at a height H of 10 to 50 mm above the bottom surface 10a where the third recess 10f is not formed.

Further, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the scope of the present invention.

1 gutter 2 siphon drain member (drainage member)
2A Inflow opening 10 Eaves gutter 10A, 10B, 10C, 10D Funnel 10a Bottom surface 10b Through hole 11 Downspout 12 Nominal gutter 20 Drop opening 21 Lid member 22 Mounting cylinder 23 Vertical rib 24 Grip rib 25 Induction guide 40 Lid member O Drain shaft R1 Outer diameter of opening of drop opening R2 Lid diameter A1 Opening area of drop opening A2 Lid area W Rainwater

Claims (9)

A drainage member provided in a rain gutter, comprising: an eaves gutter having a through hole formed in its bottom surface; hand,
a cylindrical tubular portion that is inserted into the through hole to form a drop opening;
a plate-shaped collar portion extending radially outward from the upper end of the cylindrical portion;
a lid member disposed above the drop opening;
a plurality of vertical ribs connecting the upper surface of the collar portion and the outer peripheral portion of the lower surface of the lid member;
has
An inflow opening is formed between the lid member and the flange,
The cylindrical portion, the collar portion, the lid member and the vertical rib are integrally formed,
central axes of the cylindrical portion and the lid member are vertically aligned;
A male thread that can be screwed with a female thread formed on the inner surface of the pipe joint is formed on the outer surface of the tubular portion,
The lid member has a circular shape when viewed from the direction of the central axis,
the plurality of vertical ribs are arranged on the collar portion in the circumferential direction when viewed from the direction of the central axis, and the vertical ribs are formed in a plate shape extending in the radial direction,
The drainage member, wherein the opening area of the drop port is 30 cm ² or more and 190 cm ² or less. A drainage member provided in a rain gutter, comprising: an eaves gutter having a through hole formed in its bottom surface; hand,
a cylindrical tubular portion that is inserted into the through hole to form a drop opening;
a collar portion installed on the bottom surface of the eaves gutter;
a lid member disposed above the drop opening;
a plurality of vertical ribs connecting the upper surface of the collar portion and the outer peripheral portion of the lower surface of the lid member;
has
An inflow opening is formed between the lid member and the flange,
A connecting portion between the cylindrical portion and the flange portion is formed with a curved surface,
The cylindrical portion, the collar portion, the lid member and the vertical rib are integrally formed,
A male thread that can be screwed with a female thread formed on the inner surface of the pipe joint is formed on the outer surface of the tubular portion,
lower ends of the plurality of vertical ribs are provided at the connecting portion, and the vertical ribs are formed in a plate shape extending in a radial direction;
The drainage member, wherein the opening area of the drop port is 30 cm ² or more and 190 cm ² or less. The upper end of the cylindrical portion is below the bottom surface of the eaves gutter,
The lower end of the vertical rib is between the upper end of the cylindrical portion and the bottom surface of the eaves gutter,
The drainage member according to claim 1 or 2. The drainage member according to any one of claims 1 to 3, wherein the height of the lid member from the bottom surface is 0.1 to 0.5 times the maximum water level in the eaves gutter. . A guiding guide is formed on the lower surface of the lid member,
5. The drainage member according to any one of claims 1 to 4, characterized in that said guiding guide is conical. 5. The drainage member according to any one of claims 1 to 4, wherein the lid member has a shape recessed downward in a cross-sectional view. Eaves gutter and
A drainage member according to any one of claims 1 to 6 installed on the bottom surface of the eaves gutter;
a downpipe joint connected to the tubular portion protruding downward from the bottom of the eaves gutter;
a first elbow connected to the downpipe joint;
a nominal gutter connected to the downpipe joint via the first elbow;
a second elbow connected to the trough;
a downspout connected to the downspout via the second elbow;
a gutter comprising
A rain gutter, wherein the length of the vertical gutter is 2.0 m or more. The first elbow and the second elbow have sockets provided at both ends of the bent pipe portion,
The radius of curvature of the inner wall surface on the inner peripheral side of the bent pipe portion when viewed in a cross section including the pipe axes of the first and second elbows is at least greater than 64 mm and less than 125 mm. Item 7. Rain gutter according to item 7. The rain gutter according to claim 7 or 8, characterized in that the length of the nominated gutter is 0 m or more and 2.0 m or less.

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