JP2021124005A - Trough system - Google Patents

Abstract

To provide a trough system, particularly a large trough system with a reduced diameter part, which can more reliably produce a siphon phenomenon and stably propagate the produced siphon phenomenon to an upstream portion.SOLUTION: A trough system 1 comprises an eaves gutter 10, a downspout 45, a connection joint 35 disposed downstream of the eaves gutter and connected to an upper end part of the downspout, and a siphon joint 50 having a reduced diameter part and disposed on the downspout. A flow channel cross section S of the eaves gutter is 11000 mm2 or more. An inner diameter of the downspout is 65 mm or more. A length L7 of the downspout located between the connection joint and the siphon joint is 1 m or more.SELECTED DRAWING: Figure 1

Description

The present invention relates to a gutter system.

Conventionally, it is known that a siphon phenomenon occurs in a rain gutter system in which a reduced diameter portion is provided in a gutter (see, for example, Patent Document 1). In this gutter system, rainwater (water) is stored in the reduced diameter part. Then, the siphon phenomenon occurs due to the gravity acting on the accumulated rainwater.

Japanese Unexamined Patent Publication No. 2012-144870

The rain gutter system of Patent Document 1 is a small rain gutter system used in a house or the like. On the other hand, large-scale rain gutter systems used in distribution warehouses, factories, etc. are being studied. In this type of rain gutter system, it is necessary to increase the flow path cross-sectional area of the eaves gutter and the inner diameter of the gutter in accordance with the flow rate of the discharged rainwater.
By the way, if there is an elbow (connecting joint) between the eaves gutter and the reduced diameter part, the siphon phenomenon does not occur in the reduced diameter part, or the siphon phenomenon that occurs in the reduced diameter part causes the eaves on the upstream side where rainwater flows. It may not be transmitted to the gutter. In such a case, rainwater that is not discharged from the eaves gutter to the reduced diameter portion may accumulate, and rainwater may overflow from the eaves gutter.

The present invention has been made in view of such problems, and even in a large rain gutter system provided with a reduced diameter portion, the siphon phenomenon is more reliably generated and the generated siphon phenomenon is upstream. The purpose is to provide a gutter system that can stably transmit to the side part.

In order to solve the above problems, the present invention proposes the following means.
The rain gutter system of the present invention has an eaves gutter, a gutter, a connecting joint connected to the upper end of the gutter, and a reduced diameter portion, and is provided in the gutter. A rain gutter system including the above-mentioned siphon joint, wherein the flow path cross-sectional area of the eaves gutter is 11000 mm ² or more, the inner diameter of the gutter is 65 mm or more, and the connection joint and the siphon joint are used. The length of the gutter located between them is 1 m or more.
The flow path cross-sectional area of the eaves gutter referred to here means the cross-sectional area where rainwater can flow in the eaves gutter when viewed along the longitudinal direction of the eaves gutter.

According to the present invention, the channel cross-sectional area of the eaves ^{gutter is 11000 mm 2} or more, and the inner diameter of the gutter is 65 mm or more. Therefore, the rain gutter system can be used as a large-scale rain gutter system used in a distribution warehouse or the like. Since the siphon joint provided in the gutter has a reduced diameter portion, the flow rate of rainwater flowing into the reduced diameter portion is larger than the flow rate of rainwater flowing downstream from the reduced diameter portion. Therefore, rainwater tends to collect in the reduced diameter portion. When rainwater collects in the reduced diameter portion, the gutters arranged on the downstream side of the reduced diameter portion become full. Then, the rainwater in the reduced diameter portion is pulled by the rainwater in the gutter arranged on the downstream side of the reduced diameter portion, and a siphon phenomenon occurs, and the rainwater in the rain gutter system flows vigorously to the downstream side.
At this time, the inventors of the present application more reliably generate a siphon phenomenon in a siphon joint having a reduced diameter portion because the length of the gutter located between the connection joint and the siphon joint is 1 m or more. At the same time, it was found that the siphon phenomenon generated in the siphon joint can be stably transmitted to the upstream part of the gutter system.
Therefore, even in a large rain gutter system provided with a reduced diameter portion, the siphon phenomenon can be generated more reliably and the generated siphon phenomenon can be stably transmitted to the upstream portion.

Further, in the rain gutter system, the radius of curvature of the inner wall surface on the inner peripheral side of the connecting joint may be larger than 64 mm and smaller than 125 mm in the cross section including the axis of the connecting joint.
According to the present invention, the rainwater that has flowed into the connecting joint from one end in the direction along the axis of the connecting joint does not stay on the inner wall surface on the inner peripheral side of the connecting joint, and the flow velocity of the rainwater decreases on the inner wall surface. hard. Therefore, the rainwater that has flowed into the connecting joint can be smoothly flowed toward the other end in the direction along the axis of the connecting joint.

Further, in the rain gutter system, the angle formed by the axes of the connecting portions provided at both ends of the connecting joint may be 45 ° or less.
The angle formed by the axes of the connecting portion referred to here means the angle formed by both axes, which is the acute angle.
According to the present invention, the rainwater that has flowed into the connecting joint from one of the connecting portions of the connecting joint does not stay in the connecting joint, and the flow velocity of the rainwater in the connecting joint is unlikely to decrease. Therefore, the rainwater that has flowed into the connecting joint can be smoothly flowed toward the other connecting portion of the connecting joint.

Further, in the rain gutter system, a gutter connected to the downstream side of the eaves gutter and connected to the gutter is provided, the length of the gutter is 3 m or less, and the axis of the gutter and the gutter are described. The angle formed by the axis of the gutter may be 45 ° or less.
The angle formed by the axis of the gutter and the axis of the gutter here means the acute angle of the angles formed by both axes.
According to the present invention, the flow rate of rainwater discharged from the gutter system per unit time can be increased.

Further, in the rain gutter system, an extension provided between the underground pipe connected to the downstream end of the gutter and the siphon joint and the underground pipe in the gutter. A diameter portion may be provided.
According to the present invention, since the rainwater becomes a negative pressure in the enlarged diameter portion, the flow rate of the rainwater in the portion upstream of the enlarged diameter portion in the gutter can be further increased. Therefore, the flow rate of rainwater flowing through the gutter system can be further increased.

According to the rain gutter system of the present invention, even in a large rain gutter system provided with a reduced diameter portion, the siphon phenomenon is more reliably generated and the generated siphon phenomenon is stably transmitted to the upstream portion. be able to.

It is a side view which broke a part of the rain gutter system of 1st Embodiment of this invention. It is a vertical sectional view of the 2nd connection joint of the rain gutter system. It is a vertical cross-sectional view of the siphon joint of the rain gutter system. It is a side view which broke a part of the rain gutter system in the modification of 1st Embodiment of this invention. It is a side view which cut the part of the rain gutter system of the 2nd Embodiment of this invention. It is a vertical cross-sectional view of the siphon joint of the rain gutter system of the 1st modification of this invention. It is an enlarged view of the siphon joint of the rain gutter system. It is a vertical cross-sectional view of the siphon joint of the rain gutter system of the 2nd modification of this invention. It is an enlarged view of the siphon joint of the rain gutter system. It is a side view which broke a part of the rain gutter system of the 3rd modification of this invention.

(First Embodiment)
Hereinafter, the first embodiment of the rain gutter system according to the present invention will be described with reference to FIGS. 1 to 4.
As shown in FIG. 1, the rain gutter system 1 of the present embodiment is a large-scale rain gutter system used for a building 200 such as a distribution warehouse.
The rain gutter system 1 includes an eaves gutter 10, a first connecting joint 20, a nominal gutter 30, a second connecting joint (connecting joint) 35, a downspout 45, and a siphon joint 50.
The eaves gutter 10 is arranged under the eaves of the building 200. That is, the eaves gutter 10 is arranged below the end 201a of the roof 201 of the building 200. The eaves gutter 10 extends along a first direction X along the edge 201a of the roof 201. In FIG. 1, the eaves gutter 10 is broken in a direction orthogonal to the first direction X.
For example, the first direction X is a direction along the horizontal plane. The eaves gutter 10 is formed in a U shape with an opening at the top. The eaves gutter 10 includes a bottom wall 11, a first side wall 12, and a second side wall 13.

The bottom wall 11 is formed in a plate shape with the vertical direction Z as the thickness direction. The upper surface of the bottom wall 11 is the bottom surface 11a of the eaves gutter 10. The bottom surface 11a of the bottom wall 11 is formed with an opening 11b that penetrates the bottom wall 11 in the vertical direction Z. For example, the opening 11b has a circular shape in a plan view. The opening 11b may have a rectangular shape or the like in a plan view.
The width direction of the bottom wall 11 is the second direction Y orthogonal to the first direction X and the vertical direction Z, respectively.

The first side wall 12 rises upward from the first end (first end) of the bottom wall 11 on the first side in the second direction Y. The first side wall 12 is arranged so as to be inclined toward the first side in the second direction Y gradually as it goes upward. The second side wall 13 rises upward from the end (second end) on the second side of the bottom wall 11 opposite to the first side in the second direction Y. The second side wall 13 is arranged so as to gradually incline toward the second side in the second direction Y as it goes upward.
For example, the eaves gutter 10 is formed by bending a vinyl chloride steel plate or the like.
In this example, the upper end of the first side wall 12 is arranged above the upper end of the second side wall 13. The eaves gutter 10 in this example is a so-called front gutter.
The first side wall 12 is arranged on the first side in the second direction Y with respect to the end 201a of the roof 201 when viewed in the vertical direction Z. The second side wall 13 is arranged on the second side in the second direction Y with respect to the end 201a of the roof 201 when viewed in the vertical direction Z.

The flow path cross-sectional area of the eaves gutter 10 means the cross-sectional area where rainwater can flow in the eaves gutter 10 when viewed along the longitudinal direction (first direction X) of the eaves gutter 10. Here, a reference line L1 that passes through the upper end of the second side wall 13 and is along the horizontal plane is defined. When rainwater flows upward above the reference line L1 in the eaves gutter 10, it overflows from the second side wall 13 to the outside. The flow path cross-sectional area S means an area surrounded by the bottom wall 11, the first side wall 12, the second side wall 13, and the reference line L1.
The flow path cross-sectional area S is 11000 mm ² or more. Flow path sectional area S is preferably at 29000Mm ² or more, more preferably 40000 mm ² or more.

The eaves gutter 10 is fixed to the building 200 by a fixture (not shown). The eaves gutter 10 is preferably arranged so as to have an appropriate water gradient with respect to the horizontal plane.
The eaves gutter may be a so-called parallel gutter or the like in which the position of the upper end of the first side wall in the vertical direction Z and the position of the upper end of the second side wall in the vertical direction Z are equal to each other. When the eaves gutter is a parallel gutter, the flow path cross-sectional area S means an area surrounded by a reference line along the horizontal plane through the bottom wall, the first side wall, the second side wall, and the upper end of each side wall.

The first connection joint 20 includes a curved pipe portion 21, a first connection portion 22, and a second connection portion 23.
In the cross section including the axis of the curved pipe portion 21, the central angle of the curved pipe portion 21 is about 45 °.
The first connecting portion 22 is arranged at the first end portion in the axial direction of the curved pipe portion 21. The first connecting portion 22 is connected to the peripheral edge of the opening 11b in the eaves gutter 10.
The second connection portion 23 is a receiving port. The inner diameter of the second connecting portion 23 is larger than the inner diameter of the curved pipe portion 21. The second connecting portion 23 is arranged at the second end portion opposite to the first end portion in the axial direction of the curved pipe portion 21.
In the first connection joint, the second connection portion may be an outlet.

The gutter 30 is formed in a straight tubular shape.
The first end portion of the gutter 30 is inserted into the second connecting portion 23 of the first connecting joint 20. The second connecting portion 23 and the gutter 30 are kept watertight. The calling gutter 30 is connected to the downstream side of the eaves gutter 10 through which rainwater flows. The first connecting joint 20 connects the eaves gutter 10 and the called gutter 30. That is, the calling gutter 30 is connected to the downstream side of the eaves gutter 10.
The length of the gutter 30 is 3 m or less. The length of the gutter 30 referred to here means the length of the portion of the length of the gutter 30 that is not covered by the socket. In this example, from the actual length of the gutter 30, the gutter 30 is covered by the second connection portion 23 of the first connection joint 20 which is the receiving port and the first connection portion 37 of the second connection joint 35 which will be described later. It means the length L6 obtained by subtracting the length.
The length L6 of the gutter 30 is more preferably 2 m or less. The lower limit of the length L6 is not particularly limited, and the end portion of the second connection portion 23 of the first connection joint 20 and the end portion of the first connection portion 37 of the second connection joint 35 may be in contact with each other. .. In this case, the gutter 30 has a length that is hidden by the second connecting portion 23 and the first connecting portion 37.

As shown in FIGS. 1 and 2, the second connection joint 35 includes a curved pipe portion 36, a first connection portion (connection portion) 37, and a second connection portion (connection portion) 38. Note that FIG. 2 is a cross-sectional view including the axis of the second connection joint 35.
As shown in FIG. 2, in the present embodiment, the central angle θ1 of the curved pipe portion 36 is about 45 °.
The first connection portion 37 is a receiving port. The inner diameter of the first connecting portion 37 is larger than the inner diameter of the curved pipe portion 36. At the connecting portion between the curved pipe portion 36 and the first connecting portion 37, a first step portion 39 is formed which projects radially inward from the first connecting portion 37 and reaches the curved pipe portion 36.

The second connection portion 38 is a receiving port. The inner diameter of the second connecting portion 38 is larger than the inner diameter of the curved pipe portion 36. At the connecting portion between the curved pipe portion 36 and the second connecting portion 38, a second step portion 40 is formed which protrudes inward in the radial direction from the second connecting portion 38 and reaches the curved pipe portion 36.
The first connecting portion 37 and the second connecting portion 38 are provided at both ends of the second connecting joint 35. The angle θ2 formed by the axis O1 of the first connecting portion 37 and the axis O2 of the second connecting portion 38 is about 45 ° (45 °). The angle θ2 formed by the axis O1 and the axis O2 referred to here means an acute angle among the angles formed by the two axis lines O1 and O2.
The angle θ2 is preferably 45 ° or less. The lower limit of this angle θ2 is, for example, 1 °.

In the cross section including the axis of the second connecting joint 35, the radius of curvature of the inner wall surface 36a on the inner peripheral side of the curved pipe portion 36 is larger than 64 mm and smaller than 125 mm. In this cross section, the radius of curvature of the outer wall surface 36b on the inner peripheral side of the curved tube portion 36 is preferably larger than 64 mm and smaller than 125 mm.
As shown in FIG. 1, the second connecting joint 35 is arranged on the downstream side of the eaves gutter 10. The second end portion of the gutter 30 is inserted into the first connecting portion 37.

The downspout 45 includes a first downspout 46 and a second downspout 47. The gutters 46 and 47 are each formed in a straight tubular shape, and have the same outer diameter and inner diameter. The inner diameter of the gutters 46 and 47 is 65 mm or more (the nominal diameter of the gutters 46 and 47 is 65 mm or more). The inner diameters of the gutters 46 and 47 are preferably 75 mm or more, and more preferably 98 mm or more. It is preferable that the inner diameter of the gutter 30 is the same as the inner diameter of the gutter 45. If the inner diameters of the gutters 46 and 47 are large, the gutter support may not be able to withstand the weight of the stored water when the siphon phenomenon occurs, so the diameter is preferably 160 mm or less.
The gutters 46 and 47 extend along the vertical direction Z, respectively. The first gutter 46 is arranged above the second gutter 47. The upper end of the first gutter 46 is inserted into the second connecting portion 38 of the second connecting joint 35. That is, the second connecting joint 35 is connected to the upper end portion of the first gutter 46 (gutter 45). The gutter 30 is connected to the gutter 45 via a second connecting joint 35.
The second connecting portion 38 and the first gutter 46 are kept watertight. The second connecting joint 35 connects the nominal gutter 30 and the first gutter 46 (gutter 45).

The siphon joint 50 is not particularly limited as long as it has a reduced diameter portion. The siphon joint 50 is provided in the downspout 45. The reduced diameter portion referred to here means a joint having an inner diameter smaller than the inner diameter of any one or a plurality of pipe materials to which the siphon joint 50 is directly connected.
For example, as shown in FIG. 3, the siphon joint 50 includes an outer cylinder portion 51, an inner cylinder portion 52, a step portion 53, and a diameter reduction portion 54.

The outer cylinder portion 51 and the inner cylinder portion 52 are each formed in a straight tubular shape. The inner diameter of the outer cylinder portion 51 is equal to the outer diameter of the gutters 46 and 47, respectively. The outer diameter of the inner cylinder portion 52 is equal to the inner diameters of the gutters 46 and 47, respectively. The inner cylinder portion 52 is arranged coaxially with the outer cylinder portion 51 inside the outer cylinder portion 51. The outer cylinder portion 51 and the inner cylinder portion 52 are arranged along the vertical direction Z, respectively.
The step portion 53 is formed in a ring shape. The step portion 53 projects radially outward from the upper end of the inner cylinder portion 52. The step portion 53 is connected to an intermediate portion in the vertical direction Z of the outer cylinder portion 51.
The reduced diameter portion 54 is formed in a ring shape and is fixed on the step portion 53. The inner diameter of the reduced diameter portion 54 is smaller than the inner diameter of the step portion 53 and the inner diameter of the inner cylinder portion 52, respectively.

The lower end of the first gutter 46 is inserted into the upper end of the outer cylinder 51. The first gutter 46 and the outer cylinder portion 51 are kept watertight.
The upper end portion of the second downspout 47 is arranged between the outer cylinder portion 51 and the inner cylinder portion 52. The outer cylinder portion 51, the inner cylinder portion 52, and the second gutter 47 are kept watertight.
As shown in FIG. 1, the length L7 of the downspout 45 located between the second connecting joint 35 and the siphon joint 50 is 1 m or more. The length L7 is also the distance between the second connection joint 35 and the siphon joint 50. The length L7 is preferably 1.5 m or more. The length L7 is preferably 4 m or less. The length L7 is more preferably 3 m or less, and most preferably 2.8 m or less.
The angle θ4 formed by the axis O3 of the gutter 30 and the axis O4 of the gutter 45 is 45 ° or less. The angle θ4 formed by the two axis lines O3 and O4 here means an acute angle among the angles formed by the two axis lines O3 and O4. For example, the lower limit of this angle θ4 is 1 °.
For example, the first connecting joint 20, the nominal gutter 30, the second connecting joint 35, the vertical gutter 45, and the siphon joint 50 are formed by extruding and injection molding a resin such as vinyl chloride.

The lower end of the second gutter 47 is connected to the ground G. The lower end of the second gutter 47 is connected to a known water collecting mass (drainage mechanism) 205 buried in the ground. The catchment mass 205 is connected to a drainage structure 207 such as a sewer pipe via a connecting pipe 206.

According to the rain gutter system 1 of the present embodiment, the rainwater that has fallen on the roof 201 of the building 200 flows into the eaves gutter 10. The flow path cross-sectional area S of the eaves ^{gutter 10 is 11000 mm 2} or more, and the inner diameter of the gutter 45 is 65 mm or more. Therefore, the rain gutter system 1 can be used as a large-scale rain gutter system used in a distribution warehouse or the like. Since the siphon joint 50 provided in the downspout 45 has a reduced diameter portion 54, the flow rate of rainwater flowing into the reduced diameter portion 54 is larger than the flow rate of rainwater flowing downstream from the reduced diameter portion 54. Therefore, rainwater tends to collect in the reduced diameter portion 54. When rainwater collects in the reduced diameter portion 54, the downspout 45 (second downspout 47) arranged on the downstream side of the reduced diameter portion 54 becomes full. Then, the rainwater in the reduced diameter portion 54 is pulled by the rainwater in the gutter 45 arranged on the downstream side of the reduced diameter portion 54, and a siphon phenomenon occurs, and the rainwater in the rain gutter system 1 momentum to the downstream side. It flows well.
At this time, the inventors of the present application have stated that the length L7 of the downspout 45 located between the second connecting joint 35 and the siphon joint 50 is 1 m or more, so that the siphon joint 50 having the reduced diameter portion 54 is provided. It was found that the siphon phenomenon can be generated more reliably and the siphon phenomenon generated in the siphon joint 50 can be stably transmitted to the upstream portion of the rain gutter system 1.
Therefore, even in the large rain gutter system 1 provided with the reduced diameter portion 54, the siphon phenomenon can be generated more reliably and the generated siphon phenomenon can be stably transmitted to the upstream portion.

The rainwater drained from the gutter 45 of the rain gutter system 1 flows into the drainage structure 207 via the catchment mass 205 and the connecting pipe 206.

In the cross section including the axis of the second connecting joint 35, the radius of curvature of the inner wall surface 36a is larger than 64 mm and smaller than 125 mm. The rainwater that has flowed into the second connection joint 35 from the first connection portion 37 of the second connection joint 35 does not stay on the inner wall surface 36a, and the flow velocity of the rainwater does not easily decrease on the inner wall surface 36a. Therefore, the rainwater that has flowed into the second connecting joint 35 can be smoothly flowed toward the second connecting portion 38 of the second connecting joint 35.
The angle θ2 formed by the axis O1 of the first connection portion 37 of the second connection joint 35 and the axis O2 of the second connection portion 38 is 45 ° or less. The rainwater that has flowed from the first connection portion 37 of the second connection joint 35 into the second connection joint 35 does not stay in the second connection joint 35, and the flow velocity of the rainwater in the second connection joint 35 is unlikely to decrease. Therefore, the rainwater that has flowed into the second connecting joint 35 can be smoothly flowed toward the second connecting portion 38 of the second connecting joint 35.

The length L6 of the gutter 30 is 3 m or less, and the angle θ4 formed by the axis O3 of the gutter 30 and the axis O4 of the gutter 45 is 45 ° or less. Therefore, the flow rate of rainwater discharged from the gutter system 1 per unit time can be increased.

In this embodiment, the rain gutter system 1A shown in FIG. 4 may be configured. The rain gutter system 1A includes a first connection joint 55 in place of the first connection joint 20 and the nominal gutter 30 of the rain gutter system 1 of the present embodiment.
The first connection joint 55 includes a straight pipe portion 56 in place of the second connection portion 23 of the first connection joint 20. The outer diameter of the straight pipe portion 56 is the same as the outer diameter of the gutter 30. As shown by the alternate long and short dash line in FIG. 4, the straight pipe portion 56 is formed to have a sufficiently long length before the rain gutter system 1A is installed. In the first connection joint 55, the length of the straight pipe portion 56 is adjusted at the construction site or the like when the specifications of the rain gutter system 1A are determined. Then, the straight pipe portion 56 whose length is adjusted is inserted into the first connecting portion 37 of the second connecting joint 35.

Even in the rain gutter system 1A of the modified example configured as described above, the same effect as that of the rain gutter system 1A of the present embodiment can be obtained.

(Second Embodiment)
Next, the second embodiment of the present invention will be described with reference to FIG. 5, but the same parts as those in the embodiment will be designated by the same reference numerals, the description thereof will be omitted, and only the differences will be described.
As shown in FIG. 5, the rain gutter system 2 of the present embodiment replaces the gutter 45 of the first embodiment with a gutter 45A, an increaser (diameter expansion portion) 60, and an underground pipe 65. , Is equipped.
The downspout 45A includes a third downspout 48 in addition to each configuration of the downspout 45. The third gutter 48 is arranged below the second gutter 47. The inner diameter of the third gutter 48 is larger than the inner diameter of the second gutter 47.

The increase 60 is a so-called diameter-expanding joint. For example, the inner diameter of the lower end of the increaser 60 is larger than the inner diameter of the upper end of the increaser 60. The upper end of the increas 60 is connected to the lower end of the second gutter 47. The lower end of the increas 60 is connected to the upper end of the third gutter 48.

The underground pipe 65 is connected to the lower end of the third gutter 48 (the end on the downstream side of the gutter 45A). The underground pipe 65 is a pipe buried underground. The underground pipe 65 includes a first elbow 66, a connecting pipe 67, and a second elbow 68.
The connecting pipe 67 is arranged in the ground along a horizontal plane. The first elbow 66 connects the lower end of the third gutter 48 and the first end of the connecting pipe 67. The second elbow 68 is connected to the second end of the connecting pipe 67. The end of the second elbow 68 opposite to the end connected to the connecting pipe 67 faces downward. The second end of the connecting pipe 67 and the second elbow 68 are arranged in a rainwater mass 69 buried underground.
The increas 60 is provided between the siphon joint 50 and the underground pipe 65 in the downspout 45A.
A pipe 70 is connected to the rainwater mass 69.

In the rain gutter system 2 configured as described above, even in a large rain gutter system provided with a reduced diameter portion 54, the siphon phenomenon is more reliably generated and the generated siphon phenomenon is stabilized in the upstream portion. Can be transmitted.
Further, since the rainwater becomes a negative pressure in the increaser 60, the flow rate of the rainwater in the portion upstream of the increaser 60 in the gutter 45A can be further increased. Therefore, the flow rate of rainwater flowing through the gutter system 2 can be further increased.
The rainwater drained from the gutter 45A of the rain gutter system 2 flows into the rainwater mass 69 through the underground pipe 65. Then, it is discharged to the outside of the rain gutter system 2 through the pipe 70.

Although the first embodiment and the second embodiment of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and the configuration does not deviate from the gist of the present invention. Changes, combinations, deletions, etc. of are also included. Further, it goes without saying that each of the configurations shown in each embodiment can be used in combination as appropriate.
In the cross section including the axis of the second connecting joint 35, the radius of curvature of the inner wall surface of the second connecting joint 35 may be 64 mm or less, or 125 mm or more. The angle θ2 of the second connecting joint may exceed 45 °.
It is assumed that the downspout 45 is divided into a first downspout 46, a second downspout 47, and the like. However, the downspout may be integrally configured as one downspout.
The angle θ4 formed by the axis O3 of the gutter 30 and the axis O4 of the gutter 45 may exceed 45 °.
The gutter systems 1 and 2 need not include the first connecting joint 20 and the gutter 30.

As in the first modification shown in FIG. 6, the reduced diameter portion 54 of the siphon joint 50A may be integrated with the step portion 53. The siphon joint 50A is not provided with an inner cylinder portion 52. In other words, the siphon joint 50A is formed by the outer cylinder portion 51 and the step portion 53, and the step portion 53 is a reduced diameter portion 54. In this modification, the step portion 53 (diameter reduced portion 54) is an annular protrusion.

Here, since rainwater is stored on the upstream side of the reduced diameter portion 54 of the siphon joint 50A, the load is increased by the stored rainwater. In particular, when the inner diameter of the gutter 45 is 98 mm or more and the wall thickness of the gutter 45 is thin, the gutter may be damaged by the load of the stored rainwater. Therefore, when the inner diameter of the downspout 45 is 98 mm or more, the wall thickness of the downspout 45 is preferably at least 3 mm or more.
Here, when the wall thickness of the gutter 45 is 5 mm or less, the inner diameter of the gutter is large and it is difficult for the siphon phenomenon to occur in a full flow state. Therefore, the protruding height of the reduced diameter portion 54 of the siphon joint 50A is increased. It is desirable to make it easier to store rainwater.
Therefore, the protruding height L of the reduced diameter portion 54 from the inner surface of the downspout 47 shown in FIG. 7 is preferably 3.5 mm or more and 6 mm or less, and more preferably 4.0 mm or more and 5.5 mm or less. When the protrusion height L is less than 3.5 mm, the inner diameter is large, so that the full flow state is unlikely to occur and the siphon phenomenon may not easily occur. On the other hand, when the protrusion height L is more than 6 mm, the flow rate may decrease.

On the other hand, when the inner diameter of the downspout 45 is 98 mm or more and the wall thickness of the downspout 45 is large, the siphon phenomenon is likely to occur due to the reduced diameter portion 54 due to the small inner diameter, but the flow rate is likely to decrease.
Therefore, when the wall thickness of the downspout 45 is larger than 6.5 mm, the protruding height L of the reduced diameter portion 54 from the inner surface of the downspout 47 shown in FIG. 7 is preferably 0.4 mm or more and 2.0 mm or less, and is 0. It is more preferably 6.6 mm or more and 2.0 mm or less, and further preferably 1.1 mm or more and 2.0 mm or less. If the protrusion height L is less than 0.4 mm, the siphon phenomenon may not easily occur. On the other hand, when the protrusion height L is more than 2.0 m, the flow rate may decrease.

As in the second modification shown in FIG. 8, in the siphon joint 50B, the merging portion 57 may be provided on the downstream side with respect to the step portion 53 (diameter reduced portion 54).
As in the case of the first modification, when the inner diameter of the gutter is 98 mm or more and the wall thickness of the gutter is 5 mm or less, the protruding height L of the reduced diameter portion 54 from the inner surface of the gutter 47 shown in FIG. 9 is , 3.5 mm or more and 6 mm or less is preferable, and 4.0 mm or more and 5.5 mm or less is more preferable. On the other hand, when the inner diameter of the gutter is 98 mm or more and the wall thickness of the gutter is 6.5 mm or more, the protruding height L of the reduced diameter portion 54 is preferably 0.4 mm or more and 2.0 mm or less, and 0.6 mm or more 2 It is more preferably 0.0 mm or less, and further preferably 1.1 mm or more and 2.0 mm or less.

As in the third modification shown in FIG. 10, a drain joint 700 for connecting the opening 11b (drop opening) of the eaves gutter 10 and the joint 20 according to the embodiment of the present invention may be provided. Further, the siphon generation member 7 may be provided on the drain joint 700. As a result, even when rainwater flows into the eaves gutter during heavy rain, a siphon phenomenon occurs and it has a high drainage capacity. The siphon generating member 7 may be, for example, an injection-molded product of a synthetic resin such as a rigid vinyl chloride resin, a polyvinyl chloride, ABS, or AES. Further, the siphon generating member 7 may be made of cast iron using a mold.

The siphon generating member 7 may have a drop opening 72, a rib 71, or a lid member 73. The drop opening portion 72 projects downward from the eaves gutter 10. The rib 71 extends upward from the bottom surface 11a of the eaves gutter 10. A plurality of ribs 71 are provided at intervals in the circumferential direction of the drop opening portion 72. When the lid member 73 is provided, it is supported from below by a plurality of ribs 71. The lid member 73 covers the drop opening 72 from above. In the siphon generating member 7, rainwater flows into the drop opening 72 through the gap between the lid member 73 and the rib 71. The lid member 73 may be provided with a through hole.

The opening area of the drop opening portion 72 is 30 cm ² or more and 190 cm ² or less. If the opening area of the drop opening 72 ^{is less than 30 cm 2} , the large flow rate of drainage generated by the siphon generating member 7 may not be smoothly drained. On the other hand, when the opening area of the drop opening 72 ^{is more than 190 cm 2} , the fit becomes large, which may lead to an increase in the size of the drain joint 700 and the support tool for supporting the eaves gutter 10.

By setting the position of the lid member 73 of the siphon generating member 7 so as to be 10 to 50 mm above the bottom surface 11a of the eaves gutter 10, the siphon does not suck in air even when a large amount of rainwater flows in through the opening during heavy rain. The generating member 7 is filled with water and sealed with water. Therefore, since the siphon phenomenon can be generated at the drop opening portion 72, excellent drainage performance can be obtained.

(Example)
Hereinafter, examples and comparative examples of the present invention will be specifically shown and described in more detail, but the present invention is not limited to the following examples.
In the following examples and comparative examples, the flow path cross-sectional area S of the eaves ^{gutter 10 is 11000 mm 2} or more, and the nominal diameter of the gutter 45 is 75 (the inner diameter of the gutter 45 is 78 mm or 84 mm). (Example 1)
Specification No. shown in Table 1. As in steps 1 to 4, the length L7 of the downspout 45 located between the second connecting joint 35 and the siphon joint 50 was changed. Then, the flow rate of rainwater at the opening 11b (falling opening) of the eaves gutter 10 was measured.

Specification No. In No. 1, the length L7 of the downspout 45 was set to 3 m, and the flow rate of rainwater at the opening 11b of the eaves gutter 10 was set to 20 L / s (liter per second). In this case, since the siphon phenomenon had occurred, there was no overflow of rainwater from the eaves gutter 10.
Specification No. In 2, the length L7 of the downspout 45 was set to 2 m, and the flow rate of rainwater at the opening 11b of the eaves gutter 10 was set to 15 L / s. In this case, since the siphon phenomenon had occurred, there was no overflow of rainwater from the eaves gutter 10.
Specification No. In No. 3, the length L7 of the downspout 45 was set to 1.2 m, and the flow rate of rainwater at the opening 11b of the eaves gutter 10 was set to 10 L / s. In this case, since the siphon phenomenon had occurred, there was no overflow of rainwater from the eaves gutter 10.
Then, the specification No. In No. 4, the length L7 of the downspout 45 was set to 0.8 m, and the flow rate of rainwater at the opening 11b of the eaves gutter 10 was set to 7 L / s. In this case, since the siphon phenomenon was blocked, rainwater overflowed from the eaves gutter 10.
In the first embodiment, the specification No. Specification No. from 1 3 is an example, and the specification No. It was found that 4 is a comparative example.

(Example 2)
Specification No. shown in Table 2. As in 6 to 10, the angle θ4 formed by the axis O3 of the gutter 30 and the axis O4 of the gutter 45 and the length L6 of the gutter 30 were changed. Then, the flow rate of rainwater was measured.

Specification No. In No. 6, the angle θ4 was set to 45 °, and the length L6 of the gutter 30 was set to 1 m. In this case, the flow rate of rainwater was 20 L / s.
Specification No. In No. 7, the angle θ4 was set to 25 °, and the length L6 of the gutter 30 was set to 1 m. In this case, the flow rate of rainwater was 23 L / s.
Specification No. In No. 8, the angle θ4 was set to 45 °, and the length L6 of the gutter 30 was set to 2 m. In this case, the flow rate of rainwater was 12 L / s.
Specification No. In 9, the angle θ4 was set to 45 °, and the length L6 of the gutter 30 was set to 3 m. In this case, the flow rate of rainwater was 10 L / s.
Then, the specification No. In 10, the angle θ4 was set to 45 °, and the length L6 of the gutter 30 was set to 4 m. In this case, the flow rate of rainwater was 5 L / s.
In the second embodiment, the specification No. Specification No. from 6 A siphon phenomenon occurred at No. 10, and there was no overflow of rainwater from the eaves gutter 10. Therefore, the specification No. Specification No. from 6 It was found that 10 is an example.

(Example 3)
Specification No. shown in Table 3. As in 11 to 19, the wall thickness of the downspout 45 and the length of the step L of the reduced diameter portion of the siphon joint 54 were changed. Then, the occurrence of the siphon phenomenon and the presence or absence of overflow from the eaves gutter 10 upstream of the siphon joint 54 were measured.

In the third embodiment, the specification No. Specification No. 11 A siphon phenomenon occurred at 15, and there was no overflow of rainwater from the eaves gutter 10. On the other hand, specifications 16 and 18 are less likely to cause the siphon phenomenon, and overflow from the eaves gutter 10. Further, in the specifications 17 and 19, although the siphon phenomenon occurred, the flow rate was small and the eaves gutter 10 overflowed. Therefore, the specification No. Specification No. 11 It was found that 15 is an example.

1,1A, 2 Rain gutter system 10 Eaves gutter 30 Nominal gutter 35 Second connection joint (connection joint)
36a Inner wall surface 45,45A Vertical gutter 50 Siphon joint 54 Reduced diameter part 60 Increasure part (Diameter expanded part)
65 Underground piping L6, L7 Length O1, O2, O3, O4 Axial line S Flow path cross-sectional area θ2, θ4 Angle

Claims (5)

It includes an eaves gutter, a gutter, a connecting joint arranged downstream of the eaves gutter and connected to the upper end of the gutter, and a siphon joint having a reduced diameter portion and provided on the gutter. It ’s a gutter system,
The flow path cross-sectional area of the eaves gutter is 11000 mm ² or more.
The inner diameter of the gutter is 65 mm or more, and the gutter has an inner diameter of 65 mm or more.
A rain gutter system in which the length of the gutter located between the connecting joint and the siphon joint is 1 m or more. The rain gutter system according to claim 1, wherein the radius of curvature of the inner wall surface on the inner peripheral side of the connecting joint is larger than 64 mm and smaller than 125 mm in a cross section including the axis of the connecting joint. The rain gutter system according to claim 1 or 2, wherein the angle formed by the axes of the connecting portions provided at both ends of the connecting joint is 45 ° or less. A gutter connected to the downstream side of the eaves gutter and connected to the gutter is provided.
The length of the gutter is 3 m or less,
The rain gutter system according to any one of claims 1 to 3, wherein the angle formed by the axis of the gutter and the axis of the gutter is 45 ° or less. Underground pipes connected to the downstream end of the gutter,
In the gutter, the enlarged diameter portion provided between the siphon joint and the underground pipe, and
The rain gutter system according to any one of claims 1 to 4.

Images