JP2023106616A - Siphon drain system - Google Patents

Abstract

To provide an elbow for flowing rain water down smoothly.SOLUTION: An elbow 114 is installed at a downstream side of a siphon rain gutter system having an eaves gutter, a cylindrical part penetrating a water collection port formed on a bottom surface of the eaves gutter, and a siphone generation part for generating a siphon phenomenon. The elbow comprises a bent pipe part, and receptacles provided at both ends of the bent pipe part, wherein a radius of curvature of an inner wall surface of an inner peripheral side is greater than 64 mm and smaller than 100 mm in the bent pipe part seen in a cross section in a plane including a tube axis of the bent pipe part.SELECTED DRAWING: Figure 4

Description

The present invention relates to siphon drainage systems.

In general, a building is provided with rain gutters for receiving rainwater running down from the roof and flowing it to the ground. Rain gutters are composed of a plurality of combined members such as eaves gutters, water collectors, call gutters, downpipes, connecting pipes, elbow joints, and tee joints (each joint is hereinafter simply referred to as an elbow or a tee). . In recent years, in order to increase the drainage capacity of the rain gutter, a siphon rain gutter system has been introduced, in which the inside of the downpipe is filled with water to generate a water suction effect (so-called siphon phenomenon), which dramatically increases the amount of drainage. Proposed.

For example, in the siphon rainwater drainage apparatus disclosed in Patent Document 1, the upper end of the siphon pipe is connected to the bottom of the eaves gutter attached to the edge of the eaves. This siphon pipe is installed longitudinally along the outer wall material of the house and has an opening area of 3 to 13 cm ² .

Japanese Patent Application Laid-Open No. 2004-308399

In a siphon rain gutter system, elbows are used as joints for connecting various gutters and connecting members in the part where rainwater is drawn horizontally (or the part where rainwater is drawn vertically). . Conventionally standardized elbows include, for example, 90° bending elbows (so-called DL).

However, the radius of curvature of the inner wall portion on the inner peripheral side of the 90° bend elbow is 0 mm, and the inner wall portion on the inner peripheral side is formed at a right angle. Therefore, when a 90° bent elbow is used in a siphon rain gutter system, there is a problem that the flow velocity of rainwater is reduced on the inner wall portion on the inner peripheral side formed at right angles. Moreover, when the rainwater is pulled vertically and horizontally, there is a problem that the flow velocity of the rainwater is lowered if the call gutter or the downspout is too short. As the flow rate of rainwater decreases, the draining capacity of the siphon gutter system decreases and rainwater can overflow at the siphon generator to siphon the gutter.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides an elbow and siphon gutter system that facilitates rainwater flow down.

The elbow of the present invention is a siphon rain gutter system comprising an eaves gutter, and a tubular portion penetrating a water collection port formed on the bottom surface of the eaves gutter, and a siphon generator for generating a siphon phenomenon. An elbow installed on the downstream side of the elbow, comprising a bent pipe portion and sockets provided at both ends of the bent pipe portion, when viewed in a cross section on a plane including the pipe axis of the bent pipe portion In the bent tube portion, the radius of curvature of the inner wall surface on the inner peripheral side is larger than 64 mm and smaller than 100 mm.

By using the above-described elbow, rainwater flowing in from one of the outlets of the elbow does not stay on the inner wall surface on the inner peripheral surface side, and the flow rate of rainwater does not decrease on the inner wall portion. Therefore, rainwater smoothly flows toward the other receiving port of the elbow.

In the elbow of the present invention, the opening area of the curved tube portion may be 50 cm ² or more.

The above-mentioned elbow has a large opening area in the hollow part of the curved pipe through which rainwater flows. The flow rate of rainwater does not decrease on the inner wall without stagnation on the inner wall on the surface side.

A siphon rain gutter system of the present invention is a siphon rain gutter system comprising the above-described elbows as a first elbow and a second elbow, respectively, wherein the first elbow is provided downstream of the rain gutter upstream portion having the siphon generating portion. One end of the elbow is connected, the other end of the first elbow is connected to one end of a trough for draining rainwater flowing down the first elbow, and the other end of the trough is connected to one end of the second elbow. one end of a vertical gutter for vertically draining rainwater flowing down the second elbow is connected to the other end of the second elbow, and the other end of the vertical gutter is connected to a drainage mechanism having a width larger than that of the vertical gutter. connected, the length of the nominal trough is greater than 0 m and within 2.0 m, and the length of the vertical trough is 2.0 m or more.

According to the siphon rain gutter system described above, when rainwater flows into the curved pipe portion from one end of the first elbow connected to the upstream portion of the rain gutter in a full state due to the siphon phenomenon generated in the siphon generating portion, the rainwater flows inside. The water smoothly flows toward the eaves gutter and the part downstream from the eaves gutter without being stagnant on the inner peripheral surface side of the wall surface. In addition, since the radius of curvature of the curved pipe portions of the first and second elbows, the horizontal rainwater flow distance, and the vertical rainwater flow distance are within the above ranges, The siphon action up to the downstream end of the trough is uninterrupted and well maintained. As a result, the rainwater flowing into the first elbow from the siphon generating portion does not stay on the inner wall surface of the joint or the gutter member, and the flow velocity of the rainwater does not decrease on the inner wall portion.

A siphon rain gutter system of the present invention is a siphon rain gutter system comprising the above-described elbows as a first elbow and a second elbow, respectively, wherein the first elbow is provided downstream of the rain gutter upstream portion having the siphon generating portion. One end of the elbow is connected, the other end of the first elbow is connected to one end of a trough for draining rainwater flowing down the first elbow, and the other end of the trough is connected to one end of the second elbow. one end of a vertical gutter for vertically draining rainwater flowing down the second elbow is connected to the other end of the second elbow, the other end of the vertical gutter is connected to a drainage mechanism, and the one end of the vertical gutter is connected to The confluence pipe intersects the vertical pipe at one or more confluence positions between and the other end, the length of the nominal pipe is greater than 0 m and within 1.0 m, and one end of the vertical pipe and The distance from the most upstream confluence position is 2.0 m or more.

According to the siphon rain gutter system described above, when rainwater flows into the curved pipe portion from one end of the first elbow connected to the upstream portion of the rain gutter in a full state due to the siphon phenomenon generated in the siphon generating portion, the rainwater flows inside. The water smoothly flows toward the eaves gutter and the part downstream from the eaves gutter without being stagnant on the inner peripheral surface side of the wall surface. In addition, the curvature radii of the curved pipe portions of the first and second elbows, the downflow distance of rainwater that is pulled horizontally, and the downflow distance from the upstream end of the downspout to the most upstream confluence position are within the above ranges. By being inside, the siphon action from the siphon generating part to the downstream end of the downpipe is not easily interrupted and is well maintained. As a result, the rainwater flowing into the first elbow from the siphon generating portion does not stay on the inner wall surface of the joint or the gutter member, and the flow velocity of the rainwater does not decrease on the inner wall portion.

In the siphon rain gutter system according to the present invention, the siphon generator is a cover member arranged above the bottom surface of the eaves gutter so as to cover the opening of the water collection port formed on the bottom surface of the eaves gutter in top view, The first elbow may be connected to the water collection port.

According to the above-described configuration, rainwater collected in the water collection port by the eaves gutter is guided between the bottom surface of the eaves gutter and the upper surface of the cover member, and flows into the water collection port and the first elbow in a state of being full of water, resulting in a siphon phenomenon. occurs well.

The elbow and siphon gutter system of the present invention allows rainwater to flow smoothly.

1 is a cross-sectional view of the siphon gutter system of the first embodiment of the present invention; FIG. 2 is a cross-sectional view showing an example of a siphon drain member that can be installed in the catchment of the siphon gutter system shown in FIG. 1; FIG. 2 is another cross-sectional view showing an example of a siphon drain member that may be installed in the catchment of the siphon gutter system shown in FIG. 1; FIG. 2 is a cross-sectional view of an elbow of the siphon gutter system shown in FIG. 1; FIG. 2 is a cross-sectional view of the other end of the downspout, drainage mechanism, and arrangement therebetween of the siphon gutter system shown in FIG. 1; FIG. 2 is a cross-sectional view of another elbow of the siphon gutter system shown in FIG. 1; FIG. 2 is a cross-sectional view of a variation of the other end of the downspout, drainage mechanism, and arrangement therebetween of the siphon gutter system shown in FIG. 1; FIG. FIG. 8 is a cross-sectional view of part of the configuration shown in FIG. 7 along the D2 direction and viewed from the downstream side to the upstream side; Figure 8 is a plan view of a portion of the arrangement shown in Figure 7; FIG. 2 is a cross-sectional view showing the flow of rainwater in the siphon gutter system shown in FIG. 1; FIG. 2 is a cross-sectional view showing the flow of rainwater in the siphon gutter system shown in FIG. 1; FIG. 2 is a cross-sectional view showing the flow of rainwater in the siphon gutter system shown in FIG. 1; FIG. 2 is a cross-sectional view showing the flow of rainwater in the siphon gutter system shown in FIG. 1; FIG. 2 is a cross-sectional view showing the flow of rainwater in the siphon gutter system shown in FIG. 1; FIG. 3 is a cross-sectional view of a siphon gutter system according to a second embodiment of the present invention; 1 is a perspective view of the siphon gutter system of Example 1. FIG. FIG. 17 is a graph showing changes in the water level in the eaves gutter depending on the measuring position and the length of the gutter when changing the amount of drainage to the eaves gutter in five types in the siphon gutter system of FIG. 16 ; FIG. 17 is a diagram showing the results of observing the initial stability and drainage capacity when changing the siphon generating part with seven types in the siphon rain gutter system of FIG. 16 ; FIG. 10 is a perspective view of the siphon gutter system of Example 2; In the siphon rain gutter system of FIG. 19, the drainage amount to the connecting pipe (branch pipe) of the water level in the eaves gutter and the upstream side gutter when changing the drainage amount to the eaves gutter (10A, main pipe) in seven types 10 is a graph showing changes according to the length of .

Embodiments of the elbow and siphon gutter system of the present invention will now be described with reference to the drawings. The drawings used in the following description are schematic.

(First embodiment)
As shown in FIG. 1, the siphon rain gutter system 101 of the first embodiment to which the present invention is applied includes an eaves gutter 10 fixed to the edge of the eaves so as to be substantially horizontal, and an elbow ( a first elbow) 114; a trough 16 connected to the downstream end of the elbow 114; an elbow (second elbow) 118 connected to the downstream end 16a of the trough 16; A downspout 20 connected to the end 18b.

The eaves gutter 10 is provided under the eaves of a building (not shown). The eaves gutter 10 opens upward and extends in the D1 direction. The eaves gutter 10 has a bottom portion 10b and side walls 10s, 10s rising upward from both sides of the bottom portion 10b in the width direction (D2 direction in FIG. 1) in a cross-sectional view orthogonal to the direction D1. It is envisioned that the siphon gutter system 101 will be used in non-residential buildings with large roof areas such as factories and station buildings. Under this assumption, in order to ensure a sufficient flow rate for draining rainwater flowing from a large roof, the width of the bottom portion 10b (length in the direction of D2) is preferably at least 100 mm or more, more preferably 120 mm or more. 150 mm or more is more preferable. Although the upper limit of the width of the bottom portion 10b is not particularly limited, the width of the bottom portion 10b is preferably 300 mm or less.

A water collection port 12 penetrating through the bottom portion 10b is formed at a predetermined position in the D1 direction (longitudinal direction) of the bottom portion 10b. The upper surface of the bottom portion 10b (that is, the inner surface of the eaves gutter 10) is slightly lowered toward the water collection port 12 in the D1 direction. In addition, the lower surface of the bottom portion 10b may be formed substantially horizontally, and only the upper surface of the bottom portion 10b may descend toward the water collection port 12. The thickness of the bottom portion 10b is substantially constant, and the bottom portion 10b itself is the water collection port 12. You may descend towards

The water collection port 12 is provided with a siphon generator 50 for generating a siphon phenomenon in the siphon gutter system 101 . Specific configuration examples of the siphon generator 50 include the siphon drain member 51 shown in FIG. 2 and the siphon drain member 52 shown in FIG. The siphon generator 50 preferably has a lid member that covers the opening of the water collection port 12 .

As shown in FIG. 2, the siphon drain member 51 includes a net (lid member) 61 arranged above the water collection port 12, a mounting cylinder 62 having a drop port 70 and extending downward from the water collection port 12, and D3. A plurality of vertical ribs (lid members) 63 which connect the net 61 and the mounting cylinder 62 in the direction and are arranged at intervals in the circumferential direction at positions not overlapping the drop opening 70 in top view, the net 61 and the mounting cylinder. a flange top portion 64 that expands radially outwardly from its connection with 62 . The net 61 and the vertical ribs 63 are dust shields for preventing dust and the like from flowing into the water collection port 12 . The outer diameter of the mounting cylinder 62 is set to a size that allows it to be fitted into the water collecting port 12 . A male thread is formed on the outer peripheral surface of the mounting cylinder 62 . The upper flange portion 64 engages the upper surface of the bottom portion 10b around the water collection port 12 from above.

Siphon drain member 51 is connected to receptacle 30A of elbow 14 via connecting member 95 . The connecting member 95 has a flange lower portion 44 whose diameter expands radially outward from the upper end, and a rib 46 which protrudes radially inward from the inner wall surface at a position lowered by a predetermined height along the D3 direction from the upper end. Prepare. The flange lower portion 44 engages with the lower surface of the bottom portion 10b around the water collection port 12 from below. The rib 46 is provided to temporarily reduce the inner diameter of the connecting member 95 . By reducing the inner diameter of the connecting member 95, an effect similar to the venturi effect is exhibited, a full flow state is likely to occur, and the siphon phenomenon is favorably generated. An inner wall surface of the connecting member 95 from the upper end of the connecting member 95 to the rib 46 is formed with a female thread that can be screwed onto the outer peripheral surface of the mounting cylinder 62 .

The siphon drain member 51 is formed by inserting the bottom portion 10b around the water collection port 12 between the upper flange portion 64 and the lower flange portion 44 while screwing the male thread of the mounting cylinder 62 into the female thread of the connecting member 95. is attached to the A socket 30A for an elbow 114, which will be described later, is fitted to the lower portion of the connecting member 95. As shown in FIG. The lower portion of the connecting member 95 and the receptacle 30A may be adhered with an adhesive or the like, or may be fused together.

As shown in FIG. 3 , the siphon drain member 52 includes a plate-shaped lid 71 and a drop opening 80 . A plurality of vertical ribs 73 arranged with an opening and extending downward from the bottom surface of the lid 71 to support the lid 71, and guide portions hanging down from the bottom surface of the lid 71 and radially formed along the radial direction when viewed from above. 78 , and positioning ribs 77 arranged at intervals along the outer circumference of the lid 71 and protruding upward from the upper surface of the lid 71 . The lower end of the guide portion 78 is formed so as to gradually approach the lid 71 as it progresses outward from the radial center of the lid 71 in a side view, and has a tapered or bellmouth shape. The cover 71 reduces the entrainment of air into the elbow 114 and thus the downpipe 20, thereby facilitating the occurrence of a full flow condition and the siphon phenomenon more favorably.

Siphon drain member 52 is connected to receptacle 30A of elbow 14 via connecting member 90 . The connecting member 90 includes a tubular portion 92 that can be fitted into the socket 30A, and a flange 94 that expands in diameter from the upper end of the tubular portion 92 . The connecting member 90 is engaged with the bottom portion 10b in a state in which the cylindrical portion 92 is inserted into the water collecting port 12 and the bottom surface of the flange 94 rests on the bottom portion 10b around the water collecting port 12 . The bottom surfaces of the plurality of vertical ribs 73 are processed into a shape along the top surface of the flange 94 . The plurality of longitudinal ribs 73 and the flanges 94, and the cylindrical portion 92 and the receptacle 30A may be adhered with an adhesive or the like, or may be fused together.

The elbow 114 is a joint installed downstream of the siphon generator 50 . As shown in FIG. 1, one receptacle (one end) 30A of the elbow 14 is connected to the water collection port 12 on the downstream side (that is, the side where rainwater collects) of the eaves gutter 10 provided with the siphon generator 50. .

As shown in FIG. 4 , the elbow 114 includes a bent pipe portion 132 and receptacles 30A and 30B provided at both ends of the bent pipe portion 132 . The bent tube portion 132 bends at approximately 90° when viewed from the side.

The radius of curvature R1 of the inner wall surface 133 on the inner peripheral side of the curved tube portion 132 and the radius of curvature R2 of the outer wall surface 134 when viewed in a cross section (plane, paper surface of FIG. 4) including the tube axis A of the curved tube portion 132 are: At least greater than 64mm and less than 125m. Considering that the flow speed of the rainwater W flowing from the inlet 30A is not reduced and the rainwater W flows more smoothly, the curvature radii R1 and R2 are larger than 64 mm from the viewpoint of accommodation and transportation, and It is preferably smaller than 90 mm, and preferably larger than 80 mm and smaller than 100 mm in terms of drainage performance.

An axis J2 passing through the center C1 of the socket 30A and an axis J3 passing through the center C2 of the socket 30B intersect at a predetermined angle θ in a side view. The angle θ is preferably 90° or more and 135° or less, for example, 91.1°. By setting the angle θ as described above, the rainwater W can flow smoothly.

Let H be the straight line distance between the centers C1 and C2, D be the diameter of the hollow portion of the sockets 30A and 30B, and E be the diameter of the hollow portion of the bent tube portion 132 . The distance H is, for example, 99 mm or more and 263 mm or less, preferably 130 mm or more and 190 mm or less. The diameter D is preferably 52 mm or more and 155 mm or less, more preferably 75 mm or more and 110 mm or less, taking 88.65 mm as an example. The diameter E is appropriately set to 77.55 mm, for example, so that the cross-sectional area of the bent pipe portion 132 resulting from the diameter E does not exceed the cross-sectional area of the hollow portion of the nominal gutter 16 .

The elbow 114 is part of a siphon gutter system 101 used in non-residential buildings with large roof areas such as factories and train stations. The opening area of the bent tube portion 132 is preferably 50 cm ² or more and 150 cm ² or less, more preferably 65 cm ² or more and 125 cm ² or less, and even more preferably 75 cm ² or more and 100 cm ^{2 or} less. By setting the distance H and the diameters D and E within the ranges described above, the radius of curvature of the inner wall surface 133 described above is achieved, while the minimum required flow rate for drainage and the dimensions of the elbow 114 are secured, and the siphon rain is prevented. The gutter system 101 can be better fitted.

The radius of curvature R3 of the inner wall surface 135 and the radius of curvature R4 of the outer wall surface 136 on the outer peripheral side of the curved tube portion 132 are appropriately set according to the curvature radii R1, R2, the distance H, the diameters D, E, and the like. For example, when the diameter D is 88.65 mm, the diameter E is 77.55 mm, the radius of curvature R2 is 83.7 mm, and the diameter of the outer peripheral surface of the sockets 30A and 30B is 96.25 mm, the radius of curvature R4 is set to 163.3 mm. can. Let T be the length of the socket 30A along the axis J1 and the length of the socket 30B along the axis J2. The length T is preferably 25 mm or more and 80 mm or less, more preferably 35 mm or more and 55 mm or less, taking 40 mm as an example. When the length T is equal to or less than the above upper limit, the core can be easily pulled out when the elbow 114 is molded by injection molding, and the elbow 114 can be manufactured satisfactorily. In addition, when the length T is equal to or less than the above-described lower limit, the trough 16 may come off due to high pressure or vibration when the siphon action occurs, or water may leak from the gap between the socket 30B and the trough 16. can prevent It is important that each parameter of the elbow 114 is not limited to the exemplified numerical values and is appropriately set within the preferable range as described above.

Here, a plane along the horizontal direction passing through the center of curvature Q of the inner wall surfaces 133 and 135 is defined as a reference plane S1. A plane along the vertical direction passing through the center of curvature Q is defined as a reference plane S1. In a side view, a plane forming 45° with each of the plane along the horizontal direction and the plane along the vertical direction and passing through the center of curvature Q is defined as a reference plane S3. A position where the reference plane S3 and the inner wall surface 133 intersect is defined as a reference position P1. In a side view, the angle between a virtual line L1 connecting the center of curvature Q and the reference position P1 and a virtual line L2 connecting the center of curvature Q and the position P2 of the upstream end of the inner wall surface 133 is α1. The angle between the virtual line L1 and the virtual line L3 that connects the center of curvature Q and the downstream end position P3 of the inner wall surface 133 is defined as α2. Each of the angles α1 and α2 is preferably 10° or more and 30° or less. The angles α1 and α2 are preferably equal.

A position where the reference plane S3 and the inner wall surface 135 intersect is defined as a reference position P4. In a side view, the angle between a virtual line L4 connecting the center of curvature Q and the reference position P4 and a virtual line L5 connecting the center of curvature Q and the upstream end position P5 of the inner wall surface 135 is β1. Let β2 be the angle between the virtual line L1 and the virtual line L6 connecting the center of curvature Q and the downstream end position P6 of the inner wall surface 135 . The angles β1 and β2 are preferably 10° or more and 45° or less, taking 44.25° as an example. The angles β1 and β2 are preferably equal to each other.

In a cross-sectional view, the angle between the reference plane S3 and the opening surface 141 of the upstream socket 30A with the center of curvature Q as the center is defined as φ1. Let φ2 be the angle between the reference surface S3 and the opening surface 142 of the downstream socket 30B with the center of curvature Q as the center. The angles φ1 and φ2 are preferably 10° or more and 45° or less.

By providing the above-described configuration, the elbow 114 achieves a sufficient amount of drainage and a smooth flow of drainage, and at the same time, the size of the entire joint is appropriately suppressed. In addition, even if external force is applied to the gutter 16 due to vibration or strong wind when the siphon phenomenon occurs, the stress applied to the junction between the eaves gutter 10 and the elbow 114, the elbow 114 itself, etc. can be reduced, and the eaves gutter 10 and the eaves gutter 10 can be Damage to the elbow 114 can be prevented. Specifically, the distance (shortest distance) between the bottom portion 10b and the central axis of the trough 16 is preferably less than 140 mm, more preferably less than 130 mm.

As shown in FIG. 1, the outlet 30B of the elbow 114 is connected to the upstream end 16a of the trough 16. As shown in FIG. The trough 16 is a member that laterally draws the rainwater W flowing down the elbow 114, and is a straight pipe that extends along the D2 direction or slightly separates from the D2 direction toward the downstream side. The length F1 from the end 16a to the downstream end 16b of the trough 16 is greater than 0 m and 2.0 m or less, preferably 0.6 m or more and 1.5 m or less, and 0.6 m or more and 1.0 m. The following are more preferred. Since the length G1 is within the range described above, the rainwater flowing down from the elbow 114 smoothly flows down in a full state.

A socket 30A of the elbow 118 is connected to the downstream end (other end) 16b of the trough 16. As shown in FIG. Elbow 118 has the same configuration as elbow 114 .

The outlet 30B of the elbow 118 is connected to the upstream end 20a of the downpipe 20 . The downspout 20 is a member that vertically pulls the rainwater W that has flowed down the elbow 118, and is a straight pipe that extends along the D3 direction (the vertical direction and its opposite direction). The downstream end 20b of the downpipe 20 is connected to the ground G and connected to a known water collection trough (drainage mechanism) 180 buried in the ground. The catchment basin 180 is connected to a drainage structure, such as a sewage pipe 184 , via a manifold 182 . The catchment trout 180 has a width greater than the downspout 20 . The length F2 from the end 20a to the end 20b 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 20 is well generated and maintained when the length F2 is within the range described above.

As the length F2 of the downpipe 20 increases, the amount of rainwater W that flows down to the downstream end 20b increases, and the rainwater W flows into the water collecting basin 180 with great force. Based on this point, as shown in FIG. 5, an elbow 141, a straight pipe 142 extending along the D2 direction, a diameter expansion joint 144 and a straight pipe 146, and an elbow 120 are connected in this order to the downstream end 20b. preferably.

One receptacle 30A of an elbow 141 (elbow 140A) is connected to the downstream end 20b of the downpipe 20 . Elbow 141 is a combination elbow and includes two elbows 140A and 140B. As shown in FIG. 6, the curved tube portion 32 of each of the elbows 140A and 140B is bent at approximately 45° in side view. That is, the axes J3 and J4 passing through the sockets 30A and 30B respectively intersect at an included angle of 45° in a side view. As shown in FIG. 5, due to the combination of the two elbows 140A and 140B, the axis J3 passing through the socket 30A of the elbow 140A and the axis J4 passing through the socket 30B of the elbow 140B intersect at 90° in side view. A bent elbow 141 is constructed.

The upstream end of the straight pipe 142 is connected to the other receptacle 30B of the elbow 141 (elbow 140B). The upstream end of the diameter expansion joint 144 is connected to the downstream end of the straight pipe 142 . The upstream end of the straight pipe 146 is connected to the downstream socket of the diameter expansion joint 144 . The diameter of the hollow portion of straight pipe 146 is larger than the diameter of the hollow portion of straight pipe 142 . The straight pipe 146 penetrates the water collecting mass 180 in the longitudinal direction along the D2 direction. The downstream end of the straight pipe 146 is located inside the catchment mass 180 . A socket 30A of the elbow 120 is connected to the downstream end of the straight pipe 146 . Elbow 120 has the same configuration as elbow 114 . A socket 30B of the elbow 120 opens downward.

In the configuration shown in FIG. 5, the rainwater W (not shown in FIG. 5) that has flowed down the downpipe 20 toward the downstream side in the D3 direction flows down while bending toward the downstream side in the D2 direction by the elbow 141, and flows down the straight pipe 142. , the diameter expansion joint 144, and the straight pipe 146 toward the downstream side in the D2 direction. Furthermore, the rainwater W is discharged from the elbow 120 to the downstream side in the D3 direction, that is, downward, and is stored in the water collection trough 180 . According to the configuration shown in FIG. 5, the elbow 141, the straight pipe 142, the diameter expansion joint 144, and the straight pipe 146 are provided, so that the flow velocity and the drainage amount of the rainwater W flowing down the downspout 20 at high speed can be moderately suppressed. Further, according to the configuration shown in FIG. 5, an elbow 120 is provided at the extreme end of the downstream side, and the receptacle 30B of the elbow 120 opens downward, thereby preventing rainwater W from colliding with the side wall of the water collecting basin 180. This prevents rainwater W from splashing upward on the side wall of the water catchment trough 180 and spouting it onto the ground.

For example, if the siphon rain gutter system 101 is installed in an eight-story building or the like, the amount of water discharged to the downspout 20 may reach approximately 20 L/sec. In the configuration shown in FIG. 5, the diameter of the hollow portion of the downpipe 20 is 75 mm, the diameter of the hollow portion of the straight pipe 146 is 100 mm, the diameter of the hollow portion of the connecting pipe 182 is 150 mm, and the length of the connecting pipe 182 in the D2 direction is is 8 m, the rainwater W discharged from the outlet 30B of the elbow 120 into the water collecting basin 180 does not spout above the water collecting basin 180, and is well drained from the connecting pipe 182. there is

Further, in the configuration shown in FIG. 5, the elbow 120 is more preferably an elbow 140C as shown in FIG. Elbow 140C has the same configuration as elbows 140A and 140B. The socket 30B of the elbow 140 opens obliquely downward in accordance with the direction of the axis J4 (see FIG. 6). Since the receiving port 30B of the elbow 140 is opened obliquely downward, the straight pipe 142, the diameter expansion joint 144, and the straight pipe 146 are prevented from floating upward in the D3 direction due to the momentum of the rainwater W discharged from the elbow 140C. and the load on the elbow 141 can be reduced.

In the configuration shown in FIG. 7, as shown in FIG. 8, the receptacle 30B of the elbow 140C is obliquely downward when viewed from the D2 direction (that is, the direction along the axis J3 (see FIG. 6) of the receptacle 30A). You can open it. By opening obliquely downward in this way, the rainwater W discharged from the outlet 30B of the elbow 120 into the water collecting basin 180 swirls inside the water collecting basin 180, and the swirling rainwater W causes the bottom of the water collecting basin 180 to move downward. Garbage and mud accumulated in the water collecting basin 180 are swirled up, and the garbage and mud are efficiently discharged to the outside of the water collecting basin 180 through the connecting pipe 182 together with the rainwater W. For the same effect, the socket 30B of the elbow 120 may be opened obliquely downward when viewed from the D2 direction also in the configuration shown in FIG.

In the configuration shown in FIG. 7, it is preferable that the elbow 140C (in particular, the socket 30B) be arranged radially outside the center of the water collecting basin 180 in plan view, as shown in FIG. By arranging the elbow 140</b>C in this way, the rainwater W discharged from the outlet 30</b>B of the elbow 120 into the water collecting basin 180 is likely to cause a swirling flow inside the water collecting basin 180 , and the rainwater W and the water collecting basin 180 are easily swirled. Garbage and mud accumulated inside the water collecting basin 180 are efficiently discharged to the outside of the water collecting basin 180 through the connecting pipe 182 . From the same effect, in the configuration shown in FIG. 5, when the socket 30B of the elbow 120 opens obliquely downward when viewed from the direction D2, the elbow 120 (especially the socket 30B) functions as a water collecting basin. It is preferably located radially outward from the center of 180 .

The material of each component of the siphon gutter system 101, including the elbows 114, 118, is, for example, vinyl chloride, preferably rigid vinyl chloride.

According to the elbows 14, 18 and the siphon gutter system 101 of the first embodiment described above, the radius of curvature of the inner wall surface 133 and the outer wall surface 134 is greater than 64 mm and less than 100 mm. As a result, the rainwater W that has flowed from the water collecting port 12 into the receiving ports 30A of the elbows 114 and 118 can smoothly flow toward the receiving ports 30B without becoming stagnant on the inner wall surface 133.例文帳に追加

Further, in the siphon rain gutter system 101 of the first embodiment, the angles α1, α2, β1, β2, φ1, and φ2 are appropriately set within the ranges described above, so that the direction of rainwater W flowing from the siphon generator 50 is , from the D3 direction to the D2 direction at almost the same rate with respect to the virtual line L1, the symmetry of the flow distribution in the cross section orthogonal to the pipe axis A is increased, and the decrease in the flow velocity of the rainwater W flowing down is reliably suppressed. be able to. In addition, the sizes of the elbows 114 and 118 can be moderately suppressed, and the fitting of the siphon rain gutter system 1 can be improved.

Further, in the siphon rain gutter system 101 of the first embodiment, the outlet 30A of the elbow 114 is connected to the water collection port 12, the length of the nominal gutter 16 is greater than 0 m and within 2.0 m, and the length of the downpipe 20 The length is 2.0 m or more. According to such a configuration, rainwater W collected in the water collection port 12 by the eaves gutter 10 is drained from the bottom portion 10b and the net 61 and the lid 71 and between the plurality of vertical ribs 63 and 73 through the drain ports 70 and 80. , allowing it to flow into the water catchment 12 and elbow 114 in a full state. The state where the water level of the rainwater W in the eaves gutter 10 is lower than the lid 71 of the siphon generating portion 50 (hereinafter referred to as a gravity flow state, see FIG. 10) to the state where the water level of the rainwater W in the eaves gutter 10 is above the lid 71 ( The rainwater W from the siphon generating portion 50 directly flows into the elbow 114 when the siphon generating state is established. In the initial siphoning state in which the water level of the rainwater W in the eaves gutter 10 is substantially the same as that of the lid 71, as shown in FIG. Fill up and leave no air in the upper part of the elbow 114. After that, as shown in FIG. 12, when the amount of drainage from the siphon generator 50 becomes maximum (that is, when the water level of the rainwater W in the eaves gutter 10 approaches the highest water level allowed in the eaves gutter 10), the water is full. The rainwater W in the conditions will self-siphon inside the elbows 114,118. In addition, the rainwater W on the upstream side is pulled downstream by the tensile force of the rainwater W on the downstream side, and as shown in FIG. flow down

In the siphon gutter system 101 of the first embodiment, the siphon generator 50 and the elbow 114 are close to each other. The siphon action is maintained uninterrupted because the part where the air gets caught is shallower as it progresses from the radially outer periphery of 50 toward the center. Therefore, even if there is a transition between the free flow state shown in FIG. 13 and the siphon generation state shown in FIG. 14, the siphon action at the elbow 114 can be maintained without interruption. Therefore, according to the elbows 114 and 118 and the siphon rain gutter system 101 of the first embodiment, the rainwater W can flow down smoothly.

The siphon gutter system 101 of the first embodiment includes two elbows 114 and 118 between the eaves gutter 10 and the downspout 20 and one gutter 16 between the elbows 114 and 118 . However, the siphon gutter system 101 is not limited to a gutter system having such a configuration, and may be provided with at least two elbows and at least one or more gutter 16 between the two or more elbows. . Between the eaves gutter 10 and the downpipe 20, three or more elbows and two or more nominal gutter 16 connected by the three or more elbows may be provided.

(Second embodiment)
Next, a siphon rain gutter system of a second embodiment to which the present invention is applied will be described. Components of the siphon rain gutter system 102 shown in FIG. 15 that are the same as those of the siphon rain gutter system 101 are denoted by the same reference numerals, and descriptions thereof are omitted.

As shown in FIG. 15, the siphon rain gutter system 102 of the second embodiment includes, in addition to the configuration of the siphon rain gutter system 101, a downspout 21 and a junction pipe 28 connected to the downstream side of the downspout 20, and a downspout 20, 21 and a cheese 140 connecting the junction pipe 28. In the siphon gutter system 102 , two downspouts 20 , 21 are provided as downspouts downstream of the elbow 118 . That is, when the downspouts 20 and 21 are combined as one downspout, in the siphon rain gutter system 102, the end (one end) 20a of the downspout 20 on the upstream side of the downspouts 20 and 21 and the downspout on the downstream side A confluence pipe 28 intersects these downpipes 20 and 21 at a confluence position X1 between the downstream end (other end) 21b of 21 and the confluence. A distance F3 from the end 20a to the merging position X1 is 2.0 m or more.

The cheese 140 is a joint installed to cause the rainwater W that has flowed down the downspout 20 and the rainwater W that has flowed down the confluence pipe 28 downward in the D3 direction to the downspout 21 . The cheese 140 includes a main pipe 145 extending linearly along the D3 direction, sockets 130A and 130B provided at both ends of the main pipe 145, and branching along the D2 direction from the middle of the main pipe 145 in the D3 direction. It has a protruding branch pipe 143 and a socket 130C provided at the tip of the branch pipe 143 . The downstream end 20b of the downpipe 20 is connected to the receptacle 130A. The upstream end 21a of the downpipe 21 is connected to the receptacle 130B. The downstream end 21b of the downspout 21 is connected to the ground G and connected to a well-known water collecting mass 180 buried in the ground.

The confluence pipe 28 is a member that laterally pulls rainwater W that has flowed down the upstream part of the rain gutter (not shown), and extends along the D2 direction. A downstream end 28b of the confluence pipe 28 is connected to the receptacle 130C. Although not shown, the configuration upstream of the junction pipe 28 is not particularly limited. For example, the same configuration as the eaves gutter 10, the elbow 114, the gutter 16, the elbow 118, and the downspout 20 may be provided on the upstream side of the junction pipe 28.

Since the elbows 114, 118 of the second embodiment have the same configuration as the elbows 114, 118 of the first embodiment, similar effects can be obtained. In addition, in the siphon rain gutter system 102 of the second embodiment, the outlet 30A of the elbow 114 is connected to the water collection port 12, the length of the nominal gutter 16 is greater than 0 m and within 1.0 m, and the length of the downpipe 20 The distance from the upstream end 20a to the confluence position X1 (that is, the length of the downpipe 20) is 2.0 m or more. According to such a configuration, even if there is a transition between the free flow state shown in FIG. 13 and the siphon generation state shown in FIG. can be maintained well. Therefore, according to the elbows 114, 118 and the siphon gutter system 102 of the second embodiment, rainwater can flow smoothly.

As in the second embodiment, in the siphon rain gutter system 101 of the second embodiment, between the eaves gutter 10 and the downspout 20, a nominal gutter 16 having elbows 110 connected to both ends is provided. The elbow 110 is connected to the bottom portion 10b of the eaves gutter 10, and the downstream elbow 110 and the downspout 20 are connected. It is sufficient that at least one or more ducts 16 are provided between the elbows 110, and three or more elbows 110 are provided between the eaves gutter 10 and the downpipe 20, and between the three or more elbows 110. Two or more troughs 16 may be provided.

Also, in the siphon rain gutter system 102 described above, there is only one merging position X1, but the merging position X may be provided at a plurality of positions. When a plurality of merging positions X are provided, the distance is from the upstream end 20a of the downpipe 20 to the most upstream merging position X1 among the plurality of merging positions X. In addition, like the siphon rain gutter system 101 of the first embodiment and the siphon rain gutter system 102 of the second embodiment, in the siphon rain gutter system of the present invention, rainwater W The distance to the position where some change occurs in the flow direction (that is, the length of the downpipe 20) is set to 2.0 m or more. Examples of some changes in the flow direction of the rainwater W include, as in the first embodiment, "radiating to the water collecting mass 180 having a width larger than the downspout 20", and as in the second embodiment, "convergence "to join the pipe 28", "to connect an elbow having the same configuration as the elbow 114 to the downstream end 20b of the downspout 20, or an elbow 141 (see FIGS. 5 and 7)". , etc., are widely included.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various modifications can be made within the scope of the gist of the present invention described in the scope of the claims. Transformation and change are possible.

For example, the upstream part of the rain gutter in the present invention is not limited to the eaves gutter 10, but may be any part that can form a water collection port and can be provided with a siphon generating part, and includes all gutter members and water collectors. For example, the upstream part of the rain gutter includes a drainage ditch formed in the roof slab of a building made of concrete, and an elbow 114, a nominal gutter 16, an elbow 118 and a downspout 20 embedded so as to penetrate the roof slab of the building. and may be provided. In such a siphon drainage system, a siphon generator 50 may be provided at the bottom of the drain and at the top of the elbow 114 .

In addition, the configuration of the siphon generator 50 is not limited to the siphon drain members 51 and 52 described above, and may be configured to allow rainwater to flow into the water collection port 12 in a full state. and a member that generates a siphon by means of a water storage container that stores water as described in (1) above. An elbow of the present invention may be installed downstream of such a member. If rainwater can flow into the water collection port 12 in a full state without providing any member, the water collection port 12 can function as a siphon generator.

Also, the siphon gutter system of the present invention does not necessarily have the elbows 114, 118 between the eaves gutter 10 and the gutter 16 and between the gutter 16 and the downspout 20. Other elbows and right angle joints may be provided provided they do not reduce the

Next, an embodiment of an elbow according to the present invention will be described. It should be noted that the configuration and effects of the elbow according to the present invention are not limited to the following examples.

(Example 1)
As shown in FIG. 16, an experimental model of the siphon rain gutter system 101 of the first embodiment is prepared, a predetermined amount of water is allowed to flow into the eaves gutter 10, and siphon generation is observed. The water level was measured at The eaves gutter 10 has a length of 15m along the D1 direction. The siphon generator 50 is provided near one end of the eaves gutter 10 in the D1 direction (the front end in the D1 direction in FIG. 16). The limit water level of the eaves gutter 10 was set to 150 mm. The water level of the eaves gutter 10 is measured using a water level gauge at a position separated by a distance Y along the D1 direction from the siphon generator 50, and the distance Y varies between 0.4 m, 5 m, and 14 m. let me The radius of curvature of the inner wall surface 133 of the elbows 114 and 118 in cross section was set to 83.7 mm, and the opening area of the curved tube portion 132 was set to 5410 mm ² . The material of the eaves gutter 10, the siphon generator 50, and the elbow 114 of the siphon rain gutter system 1 was hard vinyl chloride. The amount of water discharged to the eaves gutter 10 was changed in five types of 4 L/sec, 8 L/sec, 12 L/sec, 16 L/sec, and 20 L/sec. The length F1 of the trough 16 was varied from 0.6 m indicated by the solid line in FIG. 16 to 1.0 m, 1.5 m and 2.0 m. The length F2 of the downpipe 20 was fixed at 2.4 m. The water discharged from the downpipe 20 was scooped up with a container.

FIG. 17 is a graph showing changes in the water level of the eaves gutter 10 depending on the distance Y and the length F1 when the amount of water discharged to the eaves gutter 10 is changed with five types. As shown in FIG. 17, even if the eaves gutter 10 has a length of 15 m, it becomes difficult to draw water downstream if the gutter 16 is long. Specifically, when the length F1 of the gutter 16 is 0.6 m and 1.0 m, respectively, the water level at the eaves gutter 10 increases as the amount of water discharged to the eaves gutter 10 and the distance Y increase. It fell within the range of less than 150 mm, which is the limit water level of the eaves gutter 10. When the length F1 exceeded 1 m, the drainage performance slightly decreased. When the length F1 is 1.5 m, the water level in the eaves gutter 10 falls within a range of less than 150 mm if the amount of water discharged to the eaves gutter 10 is up to 16 L/sec, but when the eaves gutter 10 reaches 20 L/sec, the eaves gutter 10 is filled with water. It overflowed from 10 and became unmeasurable. When the length F1 = 2.0 m, the water level in the eaves gutter 10 falls within a range of less than 150 mm if the drainage amount to the eaves gutter 10 is up to 12 L/sec, but the drainage amount to the eaves gutter 10 is 16 L/sec. Sec, water overflowed from the eaves gutter 10 and measurement became impossible.

That is, from the results of Example 1, the length F1 to the downstream end 16b of the trough 16 is at least greater than 0 m and 2.0 m or less, preferably 0.6 m or more and 1.5 m or less, and 0 It was confirmed that 6 m or more and 1.0 m or less is more preferable.

In FIG. 18, the siphon generator 50 is numbered. 1 to No. It is a figure which shows the result of having observed initial stability and drainage capacity when changing with seven types to 7. FIG. In this observation, the distance Y was set to 1.0 m, and the length F1 was set to 3.0 m. Regarding the evaluation of the initial stability, if the water level at the time of siphon action is 90 mm or less when the amount of drainage to the eaves gutter 10 is 12 L / sec, it is "◯", if it exceeds 90 mm and is 120 mm or less, When it exceeded 120 mm, it was set as "x". Regarding the evaluation of the drainage capacity, if the maximum water level is 120 mm or less when the drainage amount to the eaves gutter 10 is 12 L / sec, it is "○", if it exceeds 120 mm and 150 mm or less, it is "△", and it exceeds 150 mm. In that case, it was marked with "x". As shown in FIG. 18, there are seven types of siphon generator configurations, ranging from a simple “funnel” configuration to a relatively complex “cover mesh” configuration. The initial stability of became "x". On the other hand, as for the drainage capacity, for example, "strut + vortex suppressing rib" was "Δ", but the other six types of siphon generating unit 50 configurations were "◯". As described above, it was confirmed that the siphon gutter system 101 can provide good drainage characteristics even when using various types of siphon generation unit 50 configurations from relatively simple ones.

(Example 2)
As shown in FIG. 19, an experimental model of the siphon rain gutter system 102 of the second embodiment is prepared, a predetermined amount of water is allowed to flow into the eaves gutters 10A and 10B, and siphon generation is observed. The water level at trough 10 was measured. An elbow 119, a downspout 20B, an elbow 118B, a trough 16B, an elbow 114B, a connecting member 90, a siphon generator 52B, and an eaves trough 10B are connected to the upstream side of the confluence pipe 28 from the nearest side. The elbow 119 has the same configuration as the elbow 114 described in the first embodiment.

The water levels of the eaves gutters 10A and 10B were measured at a distance of 0.4 m from the siphon generator 50 in the D1 direction using the water level gauge (not shown in FIG. 19). The radius of curvature of the inner wall surface 133 of the elbows 114A, 114B, 118A, 118B, and 119 in a cross-sectional view was set to 83.7 mm, and the opening area of the curved tube portion 132 was set to 5410 mm ² . The amount of water discharged to the eaves gutter 10A was changed at seven types of 2 L/sec, 4 L/sec, 6 L/sec, 8 L/sec, 10 L/sec, 12 L/sec and 14 L/sec. The amount of water discharged to the eaves gutter 10B (that is, the amount of water discharged to the junction pipe 28) was changed to three types: 4 L/sec, 2 L/sec, and 0 L/sec (that is, the state in which water did not flow from the junction pipe 28). The length F1 of the troughs 16A and 16B was fixed at 0.6 m. By changing the position of the cheese 140 in the longitudinal direction of the downspout, the distance F3 from the upstream end of the downspout 20 to the confluence position X1 is 0 m (that is, the short pipe ), 3.0 m, and 15 m. The water discharged from the downpipe 21 was scooped up with a container.

FIG. 20 is a graph showing changes in the water level of the eaves gutter 10A depending on the amount of water discharged to the confluence pipe 28 (branch pipe) and the distance F3 when the amount of water discharged to the eaves gutter 10A (main pipe) is changed in seven types. be. As shown in FIG. 20, if the amount of water flowing into the merging pipe 28 is small, air enters the water in the hollow parts of various joints and gutter members, and the siphon phenomenon on the main pipe side does not occur. Specifically, the water level in the eaves gutter 10A increased as the amount of water discharged to the junction pipe 28 decreased or the distance Y increased. When the amount of drainage to the confluence pipe 28 is 4 L/sec, the distance F3 is any of 0 m, 3.0 m, or 15 m, and the amount of drainage to the eaves gutter 10A is any of the seven types, the eaves gutter 10A The water level fell within the range of less than 150mm. On the other hand, when the amount of drainage to the confluence pipe 28 is reduced to 2 L/sec, the water level in the eaves gutter 10A is within the range of less than 150 mm if the amount of drainage to the eaves gutter 10A is 12 L/sec or less. When the amount of drainage reached 14 L/sec, water overflowed from the eaves gutter 10A, making measurement impossible. Further, when the amount of drainage to the confluence pipe 28 is reduced to 0 L/sec, if the amount of drainage to the eaves gutter 10A is 8 L/sec or less, the water level at the eaves gutter 10A falls within a range of less than 150 mm, but the water level to the eaves gutter 10A When the amount of drainage reached 10 L/sec, water overflowed from the eaves gutter 10A, making measurement impossible.

That is, from the results of Example 2, it was confirmed that the distance F3 is preferably 2.0 m or more. It was also confirmed that the amount of water discharged to the connecting pipe 28 is preferably at least 4 L/sec.

101, 102 Siphon rain gutter system 114, 118 Elbows 30A, 30B Socket 32 Curved pipe 133 Inner wall surface 134 Inner wall surface 50 Siphon generator

Claims (6)

A siphon drainage system provided with a siphon generator,
a first elbow having one end connected to the downstream side of the upstream portion having the siphon generating portion;
a second elbow having one end connected to the upstream side of the first pipe;
a second pipe provided between the first elbow and the second elbow;
a catchment mass connected to the downstream side of the first pipe;
The water-collecting basin has an opening facing downward in the water-collecting basin for discharging rainwater flowing down the second elbow into the water-collecting basin, and a connection for draining rainwater from the water-collecting basin. provided with a tube and
The opening surface is located above the connecting pipe,
Siphon drainage system. Each of the first elbow and the second elbow has a curved tube portion in which the radius of curvature of the inner wall surface on the inner peripheral side is greater than 64 mm and less than 125 mm when viewed in cross section on a plane including the tube axis.
The siphon drainage system of claim 1. The first elbow and the second elbow each have a curved tube portion with an opening area of 50 cm ² or more,
A siphon drainage system according to claim 1 or 2. A third elbow, a diameter expansion joint, and a fourth elbow are provided in this order at the downstream end of the first pipe,
the fourth elbow is positioned in the catchment basin;
The fourth elbow has the opening face that opens downward or obliquely downward in the water collecting mass,
Siphonic drainage system according to any one of claims 1-3. a downstream end of the first pipe includes the open surface, is connected to the water collecting basin, and is disposed in the water collecting basin;
Siphonic drainage system according to any one of claims 1-3. The second pipe has a joint that allows rainwater flowing down the confluence pipe to flow down to the second pipe,
The siphon drainage system of claim 5.

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