JP2011190617A - Down pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a down pipe increasing the amount of drainage per unit time in comparison with the case of gravity flow of rainwater in the down pipe in a heavy rain without providing a water sealing member or enlarging the diameter of the down pipe like the prior art. <P>SOLUTION: The down pipe 4 for guiding rainwater W to flow down to a drain pipe includes a venturi section 10 provided to reduce a passage area inside used as a passage of rainwater W and set in shape according to the planned drainage amount of rainwater W. When rainwater W of fixed flow or more flows into the down pipe 4, the venturi section 10 becomes resistance to cause stagnation of rainwater W above the venturi section 10. Further, pressure P applied from the stagnant rainwater W' exceeds resistance force of the venturi section 10 to cause the stagnant rainwater W' to flow down the venturi section 10, and negative pressure is generated downward from the venturi section 10. The stagnant rainwater W'is pulled to flow down by the negative pressure generated to the venturi section 10. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a dredge for flowing rainwater and guiding it to a drain pipe.

  Conventionally, in houses, etc., there is an eaves for receiving rainwater flowing down from the roof, and an eaves for connecting the rainwater collected in the eaves to a drain pipe through a water collector or call. The provided gutter (gutter device) is installed. In addition, in order to absorb displacement and deformation due to thermal expansion and contraction, the dredge can be slid in the vertical direction on a cylindrical drainage pipe cover (garden protection cover) with its lower end attached to the drainage pipe. Connected.

  On the other hand, this type of rain gutter is required to increase the amount of drainage per unit time without impairing the appearance of a house or the like so that rainwater can be suitably discharged into a drain pipe even during heavy rain.

  On the other hand, a rain gutter that makes it possible to increase the amount of drainage per unit time by using the principle of siphon is proposed and put into practical use (see, for example, Patent Document 1). . A rain gutter utilizing the principle of this siphon is provided with a bottomed cylindrical water-sealing member (bottomed cylinder) in the drain pipe cover with a gap between the drain pipe cover, The lower end portion is inserted into the water seal member, and the rain water flowing out from the bag is received by the water seal member.

  In the rain gutter constructed in this way, the opening at the lower end of the gutter is blocked by the rain water in the water gland member with the water level in the water gland member reaching the position of the lower end (bottom face) of the gutter. Therefore, when a large amount of rainwater flows from the eaves into the fence, the rainwater collects in the fence. Then, the amount of rainwater that accumulates in the cage increases, and when the pressure that acts from the rainwater that accumulates in the cage becomes greater than the pressure that acts from the rainwater in the water seal member at the lower end portion of the cage, The rainwater collected in the tub falls into the water seal member due to its own weight, and the rainwater in the water seal member overflows, flows down the gap between the water seal member and the drain pipe cover, and is discharged to the drain pipe. At this time, the rainwater accumulated in the cage is pulled downward by the siphon phenomenon, and flows down in the cage at a flow rate larger than the flow rate when it naturally falls. This makes it possible to increase the amount of drainage per unit time without increasing the diameter of the ridge (without impairing the appearance of a house or the like).

JP 2005-330666 A

  However, in the conventional rain gutter using the siphon principle, a drainage pipe cover larger than the conventional one is required by providing a water seal member in the drainage pipe cover. For this reason, a large drain pipe cover may affect the appearance of a house, etc., or if there are projections on the outer wall, etc., the large drain pipe cover may interfere with the projections, making it impossible to attach the product itself. there were.

  Although it is conceivable to reduce the diameter of the ridge and make the water seal member and thus the drain pipe cover small, in this case, there arises a disadvantage that foreign substances are easily clogged in the ridge.

  In order to achieve the above object, the present invention provides the following means.

  The kite according to claim 1 is a kite arranged with the axial direction directed in the vertical direction, for flowing rainwater down and leading it to the drain pipe, and has a channel area inside the rainwater channel. The venturi part is provided so as to decrease, and the shape is set according to the planned amount of rainwater drainage. When rainwater of a certain flow rate or more flows into the dredger, the venturi part becomes a resistance and the venturi part has a resistance. The rainwater stays upward, the pressure acting from the staying rainwater exceeds the resistance force of the venturi part, and the staying rainwater flows down the venturi part and generates a negative pressure downward from the venturi part. Further, the present invention is characterized in that the accumulated rainwater is pulled down by the negative pressure generated in the venturi section.

  The scissors according to claim 2 are the scissors according to claim 1, wherein the venturi portion has a central axis direction in an axial direction of the scissors and a gap between the inner peripheral surface of the scissors. An installed cylindrical member, and an opening / closing member that is integrally provided on the upper end side of the cylindrical member and that opens and closes the opening on the upper end side of the cylindrical member in accordance with the pressure acting from the accumulated rainwater It is characterized by comprising.

  In the dredging according to claim 1, when the rainwater having a certain flow rate or more flows into the dredging by providing a venturi portion provided so as to reduce the flow path area inside the rainwater flow path. The venturi portion becomes a resistance, and rain water can be retained above the venturi portion. Then, the pressure acting from the accumulated rainwater (self-weight of the accumulated rainwater) exceeds the resistance force by the venturi section, and the accumulated rainwater rapidly flows down the venturi section, thereby generating a negative pressure downward from the venturi section. be able to. For this reason, it is possible to increase the flow rate of rainwater flowing down the venturi, and it is possible to continuously and continuously pull down the accumulated rainwater. As a result, the amount of drainage per unit time (planned drainage of rainwater) is greater than when rainwater naturally flows through the interior of the reeds in heavy rain without providing a water seal member or increasing the diameter of the reeds as in the past. , Rainwater treatment capacity) can be increased.

  In addition, since the venturi part that exhibits such a venturi effect (or an effect similar to the venturi effect) is provided in the interior of the bag, it affects the appearance of the house or the projection on the outer wall, etc. The amount of drainage per unit time can be increased without interfering with the installation of the product itself.

  According to the second aspect of the present invention, since the venturi portion includes the tubular member and the opening / closing member that opens and closes the opening on the upper end portion side of the tubular member, the rainwater is removed during normal rain. The gap between the inner peripheral surface of the tube and the outer peripheral surface of the tubular member can be circulated (flowed down) and discharged to the drain pipe.

  On the other hand, during heavy rain, when rainwater of a certain flow rate or more that fills the gap between the inner peripheral surface of the kite and the outer peripheral surface of the cylindrical member flows into the kite, the cylindrical member and the opening of the cylindrical member The opening / closing member in the closed posture that closes the valve acts as a resistor, and rainwater can be retained above the venturi portion. In addition, when a pressure greater than a certain value exceeding the resistance force of the tubular member and the opening / closing member acts on the opening / closing member from the retained rainwater, the opening / closing member opens to open the opening on the upper end side of the tubular member, and the accumulated rainwater Can be circulated rapidly inside the cylindrical member.

  And while the rainwater which stayed distribute | circulates the inside of a cylindrical member rapidly, a negative pressure arises below from a venturi part, and it becomes possible to increase the flow velocity of the rainwater which distribute | circulates a venturi part. Further, the rainwater flows at a high flow rate due to the negative pressure, and the rainwater staying above the venturi portion can be continuously pulled down to flow down. As a result, the amount of drainage per unit time (planned drainage of rainwater) is greater than when rainwater naturally flows through the interior of the reeds in heavy rain without providing a water seal member or increasing the diameter of the reeds as in the past. , Rainwater treatment capacity) can be increased.

It is a figure which shows the rain gutter (rain gutter apparatus) which concerns on one Embodiment of this invention. It is a figure which shows the scissors which concern on one Embodiment of this invention, and is a figure which shows the state which the opening-and-closing member of the venturi part obstruct | occluded opening of the cylindrical member. It is a figure which shows the scissors which concern on one Embodiment of this invention, and is a figure which shows the state which the opening / closing member of the venturi part opened and opened the opening of the cylindrical member. It is a figure which shows the state which the opening-and-closing member of the venturi part of the collar which concerns on one Embodiment of this invention opens and closes according to a pressure. It is a figure which shows the modification of the venturi part of the collar which concerns on one Embodiment of this invention.

  Hereinafter, a bag according to an embodiment of the present invention will be described with reference to FIGS. This embodiment relates to a rain gutter (rain gutter device) installed in a house or the like, and in particular, makes it possible to increase the amount of drainage per unit time without impairing the appearance of the house or the like. It is about cocoon.

  First, as shown in FIG. 1, the rain gutter 1 of the present embodiment includes an eave gutter 2 that receives rainwater W flowing from the eaves of the roof T1, a water collector (drainage drain) 3 attached to the eave gutter 2, A cage 4 disposed with the axis O1 in the vertical direction along the outer wall T2 of a house, etc., and a call 5 connecting the upper end 4a of the cage 4 and the eaves 2 (collector 3); It is attached to the drain pipe 6 buried in the ground, supports the lower end 4b side of the gutter 4 so as to be slidable in the vertical direction, and thermally expands and contracts the gutter 4 while connecting the gutter 4 to the drain pipe 6. And a cylindrical drain pipe cover 7 for absorbing displacement and deformation due to the above. And this rain gutter 1 leads rain water W that has flowed down from the roof T1 and collected in the eaves gutter 2 during the rain, from the water collector 3 to the gutter 5 and from the gutter 5 to the gutter 4, and inside the gutter 4 Is discharged to the drain pipe 6.

  On the other hand, the kite 4 of this embodiment exhibits a venturi effect (or an effect similar to the venturi effect) inside the rainwater W flow path, and the amount of drainage per unit time (planned drainage of rainwater, treatment of rainwater) Venturi unit 10 for increasing the capability). The venturi section 10 is provided inside the rainwater W so as to reduce the flow path area, and its shape, arrangement, etc. are set according to the planned drainage amount of the rainwater W. In this embodiment, the venturi section 10 Is disposed above the lower end 4b of the ridge 4 by about 10 cm, for example.

  Further, as shown in FIGS. 2 and 3, the venturi portion 10 of the present embodiment supports the cylindrical member 11 and fixes the cylindrical member 11 at a predetermined position in the direction of the axis O <b> 1 of the flange 4. A fixing member 12 for opening and closing, and an opening / closing member 13 for opening and closing the opening 11b on the upper end portion 11a side of the cylindrical member 11 in the central axis O2 direction.

  The cylindrical member 11 is formed with an outer diameter smaller than the inner diameter of the flange 4, and is disposed with the central axis O <b> 2 direction directed toward the axis O <b> 1 direction of the flange 4. The cylindrical member 11 is provided with a central axis O2 coaxially arranged with the axis O1 of the flange 4. Thereby, the cylindrical member 11 is provided in the inside of the collar 4 in the state which opened the clearance gap H between the outer peripheral surface 11c and the inner peripheral surface 4c of the collar 4. FIG.

  The fixing member 12 has one end fixed to the outer peripheral surface 11c of the cylindrical member 11 and extended to the outside in the radial direction of the cylindrical member 11, and the fixing member 12 connected to the other end of the supporting portion 12a. And a portion 12b. And this fixing member 12 fixes the fixing | fixed part 12b to the inner peripheral surface 4c of the collar 4, for example using an adhesive agent etc., The center axis line O2 direction of the cylindrical member 11 is made into the axis line O1 of the collar 4. The cylindrical member 11 is held (supported) with a predetermined gap H between the inner surface 4c and the inner peripheral surface 4c of the flange 4, and the cylindrical member 11 is held inside the flange 4 in this state. Are fixedly disposed at predetermined positions.

  The opening / closing member 13 is a flap formed in a disk shape, and one flap portion 13a and the other flap portion 13b on both sides bend around the bend line S with a bend line S extending in the radial direction passing through the center as a boundary. It is possible (rotatable). The opening / closing member 13 is supported by connecting the outer peripheral edge on the bending line S to the inner peripheral surface 11 d of the cylindrical member 11, and is provided integrally on the upper end 11 a side of the cylindrical member 11. Then, as shown in FIG. 2, the opening / closing member 13 closes the opening 11b on the upper end portion 11a side of the cylindrical member 11 in an initial posture (closed posture) where both the flap portions 13a and 13b are not bent. . Further, when a pressure P of a certain value or more acts on the flap portions 13a and 13b from above (from the upper surface side of the flap portions 13a and 13b), the flap portions 13a and 13b are bent as shown in FIG. Bending downward around the line S takes an open posture, and the opening 11b on the upper end 11a side of the cylindrical member 11 is opened. In addition, the pressure P from above falls below a certain value in the open posture and returns to the initial posture to close the opening 11b on the upper end portion 11a side of the cylindrical member 11.

  The opening / closing member 13 is formed by using an elastic member, for example, so that the flap portions 13a and 13b are bent around the bending line S, or the flap portions 13a and 13b are in an initial posture. By providing a spring member (elastic member) that urges in the direction to be moved, the opening 11b of the cylindrical member 11 is automatically opened and closed according to the magnitude of the acting pressure P (opened from the initial position). The posture can be configured to automatically open and close from an open posture to an initial posture.

  And the collar 4 of this embodiment comprised in this way is provided with the venturi part 10 in the inside, Therefore The flow path area of the part which provided the venturi part 10 is more than the flow area of another part. Has also decreased.

  Next, the operation and effect of the scissors 4 of this embodiment provided with the venturi portion 10 having the above-described configuration will be described.

  In the dredging 4 of the present embodiment, during normal rain, as shown in FIGS. 1 and 4A, the rainwater W that has flowed into the dredging 4 from the eaves 2 through the water collector 3 and the call 5 , It flows down along the inner peripheral surface 4 c of the trough 4 and is discharged to the drain pipe 6. At this time, the rainwater W flows through the gap H between the inner peripheral surface 4 c of the gutter 4 and the outer peripheral surface 11 c of the cylindrical member 11 of the venturi portion 10 and is guided to the drain pipe 6. For this reason, the opening / closing member 13 is held in a closed posture, and the cylindrical member 11 is held in a state where the opening 11 b is closed by the opening / closing member 13.

  On the other hand, as shown in FIG. 1 and FIG. 4 (b), during heavy rain, the gap H between the inner peripheral surface 4 c of the gutter 4 and the outer peripheral surface 11 c of the tubular member 11 is equal to or higher than a certain flow rate that is filled with rainwater W. When the rainwater W flows from the eaves wall 2 into the basket 4 through the water collector 3 and the callout 5, first, the tubular member 11 and the opening / closing member 13 in the closed position become resistances and above the venturi 10. Rainwater W begins to stay inside the tub 4. Further, the rainwater W sequentially flows into the trough 4 and the water level of the accumulated rainwater W ′ gradually rises.

  Then, as shown in FIGS. 1 and 4 (c), the water level of the accumulated rainwater W ′ rises, and the pressure P (retained rainwater W ′ that exceeds the resistance force by the tubular member 11 and the opening / closing member 13). When the rainwater W ′ (which is due to its own weight) acts on the opening / closing member 13, the flaps 13a, 13b of the opening / closing member 13 are bent (rotated) downward around the bending line S to change from the initial posture to the open posture. Become. Thereby, the opening 11b on the upper end portion 11a side of the cylindrical member 11 is opened, and the accumulated rainwater W ′ rapidly flows (flows down) inside the cylindrical member 11 by the pressure P.

  At this time, the flap portions 13a and 13b of the opening / closing member 13 are in the closed posture, and the accumulated rainwater W ′ rapidly circulates inside the cylindrical member 11 and the inside of the cylindrical member 11 (circulating rainwater W flowing). ), The lower portion of the venturi portion 10 is in a reduced pressure state (a negative pressure is generated downward from the venturi portion 10), and the rainwater W flowing through the venturi portion 10 is less than the case where the rainwater W naturally flows down the inside of the trough 4. The flow rate increases. In this way, the negative pressure is generated and the rainwater W flows at a high flow rate, and the rainwater W ′ staying above the venturi 10 is sequentially pulled downward, and continuously flows down at a high flow rate (and at a high flow rate). Will do.

  And since the venturi part 10 provided in the inside of the eaves 4 in this way exhibits a venturi effect (an effect similar to the venturi effect), the rain water W continues to flow down at a large flow velocity triggered by the venturi part 10. The amount of drainage per unit time increases without providing a water seal member as in the case of conventional rain gutters or increasing the diameter of the gutter 4. Thereby, the rainwater treatment capability of the rain gutter 1 (gutter 4) is enhanced by providing the venturi 10 with the gutter 4, and the rain water W is prevented from overflowing from the eaves gutter 2 during heavy rain.

  In addition, when the flow rate of rainwater W flowing from the eaves 2 through the water collector 3 and the callout 5 into the cage 4 is less than a constant flow rate and the amount of accumulated rainwater W is reduced, the opening / closing member 13 is automatically moved to the initial posture. Then, the opening 11b of the cylindrical member 11 is closed, and the rainwater W flows down only from the gap H between the inner peripheral surface 4c of the flange 4 and the outer peripheral surface 11c of the cylindrical member 11.

  Therefore, in the bag 4 of this embodiment, as shown in FIG.1 and FIG.4, by providing the venturi part 10 provided in the inside used as the flow path of the rainwater W so that a flow area may be reduced. When the rainwater W having a certain flow rate or more flows into the trough 4, the venturi portion 10 becomes a resistance, and the rainwater W can be retained above the venturi portion 10. Then, the pressure P acting from the retained rainwater W ′ exceeds the resistance force of the venturi section 10, and the accumulated rainwater W ′ suddenly flows down the venturi section 10, thereby generating a negative pressure downward from the venturi section 10. Can be made. For this reason, it becomes possible to increase the flow velocity of the rainwater W flowing down the venturi section 10, and it is possible to continuously (continuously) pull down the staying rainwater W '.

  In addition, since the venturi portion 10 includes the tubular member 11 and the opening / closing member 13 that opens and closes the opening 11b on the upper end portion 11a side of the tubular member 11, the rainwater W is removed from the rainwater W during normal rain. A gap H between the inner peripheral surface 4 c of the cylindrical member 11 and the outer peripheral surface 11 c of the cylindrical member 11 can be circulated (flowed down) and discharged to the drain pipe 6.

  On the other hand, when rainwater W of a certain flow rate or more that fills the gap H between the inner peripheral surface 4c of the kite 4 and the outer peripheral surface 11c of the cylindrical member 11 flows into the kite 4 during heavy rain, the cylindrical member 11 and the opening / closing member 13 in the closed posture in which the opening 11b of the cylindrical member 11 is closed serve as resistance, and the rainwater W can be retained above the venturi 10. Further, when the opening / closing member 13 is acted upon from the rainwater W ′ in which the pressure P exceeding a certain value exceeding the resistance force by the tubular member 11 and the opening / closing member 13 is retained, the opening / closing member 13 is opened and the upper end portion 11a of the tubular member 11 is opened. The opening 11b on the side is opened, and the accumulated rainwater W ′ can be rapidly circulated inside the cylindrical member 11.

  Then, the accumulated rainwater W ′ suddenly circulates inside the tubular member 11, and negative pressure is generated downward from the venturi portion 10, so that the flow rate of the rainwater W flowing through the venturi portion 10 can be increased. Become. Further, the rainwater W flows at a high flow rate due to the negative pressure, and the rainwater W ′ staying above the venturi portion 10 can be continuously pulled down to flow down.

  Thereby, according to the kite 4 of this embodiment, the rainwater W naturally flows down the inside of the kite 4 during heavy rain without providing a water seal member or increasing the diameter of the kite 4 as in the prior art. This makes it possible to increase the amount of drainage per unit time (planned amount of drainage of rainwater).

  Moreover, since the venturi part 10 which exhibits such a venturi effect (or an effect similar to the venturi effect) is provided in the interior of the ridge 4, it affects the appearance of a house or the like, or is on the outer wall T2. The amount of drainage per unit time can be increased without interfering with the protrusions and hindering the mounting of the product itself.

  Furthermore, by attaching the venturi part 10 to the existing gutter 4 (rain gutter 1), it is possible to easily impart the effects of the present embodiment to the existing gutter 4 as well.

  The embodiment of the bag according to the present invention has been described above. However, the present invention is not limited to the above embodiment, and can be appropriately changed without departing from the spirit of the present invention. For example, in this embodiment, the venturi portion 10 is configured to include the cylindrical member 11, the fixing member 12, and the opening / closing member 13. However, as shown in FIG. 5 (and FIG. 1), for example, Even if the portion 10 includes a protrusion 14 protruding from the inner peripheral surface 4c of the flange 4 toward the axis O1 side (inside), the protrusion 14 is provided so as to reduce the flow passage area of the flange 4. Good.

  Even in such a configuration, the rainwater W that has flowed from the eaves 2 through the water collector 3 and the call 5 to the reed 4 during the normal rain is the same as that of the present embodiment. It flows down along the peripheral surface 4 c, further down the surface of the protrusion 14 of the venturi 10, and is discharged to the drain pipe 6.

  Further, when rainwater W having a certain flow rate or more flows into the trough 4 during heavy rain, the projection 14 acts as a resistance and the rainwater W stays above the venturi portion 10, and the retained rainwater W ′ becomes the venturi portion. 10, a negative pressure is generated downward from the venturi portion 10, and the flow velocity of the rainwater W flowing through the venturi portion 10 is increased as compared with the case where the rainwater W naturally flows down the inside of the basket 4. For this reason, the rainwater W ′ staying above the venturi portion 10 is sequentially pulled downward and continuously flows down at a high flow rate (and at a high flow rate).

  Thereby, the venturi part 10 provided in the inside of the eaves 4 exhibits such a venturi effect, and this venturi part 10 is triggered, and the rainwater W continues to flow down at a large flow velocity, and the water sealing member as in the conventional case It is possible to increase the amount of drainage per unit time as compared with the case where the rainwater W naturally flows through the inside of the gutter 4 without providing the gutter 4 or increasing the diameter of the gutter 4.

  Here, for example, when a pair of scissors 4 are joined by a scissors joint, if the scissors joint protrudes inward from the inner peripheral surface 4c of the scissors 4, the above-mentioned Venturi effect is accidentally obtained. There is a possibility that. However, the venturi part 10 provided with the protrusion 14 as shown in FIG. 5 presets a desired amount of drainage (planned drainage of rainwater, increase of drainage relative to conventional dredging), and the protrusion 14 accordingly. And the amount of protrusion 14 (the channel area of the venturi 10) are set. For this reason, it goes without saying that the effect (performance) is remarkably different from the case where the venturi effect is accidentally obtained with a flange joint or the like. Moreover, when the venturi part 10 is comprised including the annular protrusion 14 connected to the circumferential direction of the flange 4, the inner diameter of the flange 4 may be small, and foreign matter may be easily clogged. For this reason, when it is necessary to prevent (suppress) such clogging of foreign matters, a plurality (or a plurality) of protrusions 14 formed separately (discontinuously) in the circumferential direction of the flange 4 are formed. And the venturi unit 10 may be configured.

  In this connection, the joint 10 may be provided with a venturi portion 10, and in this case, the entire joint of the joint 4 provided with the venturi portion 10 and the joint 4 joined by this joint. The bag according to the invention is constituted.

1. Rain gutter (gutter device)
2 eaves 3 Water collector (drainage drain)
4 竪 樋 4a Upper end portion 4b Lower end portion 4c Inner peripheral surface 5 Nominal jar 6 Drain pipe 7 Drain pipe cover (gutter protection cover)
DESCRIPTION OF SYMBOLS 10 Venturi part 11 Cylindrical member 11a Upper end part 11b Opening 11c Outer peripheral surface 12 Fixed member 12a Support part 12b Fixing part 13 Opening / closing member 13a One flap part 13b Center axis P of (cylindrical member) Pressure S Bending line T1 Roof T2 Outer wall W Rain water W 'Rain water staying

Claims (2)

It is arranged with the axial direction facing up and down, and is a trough for letting rainwater flow down and guiding it to the drain pipe,
It is provided inside the rainwater flow path so as to reduce the flow area, and has a venturi part whose shape is set according to the planned amount of rainwater drainage,
When rainwater of a certain flow rate or more flows into the dredger, the venturi part becomes a resistance, causing rainwater to stay above the venturi part,
The pressure acting from the staying rainwater exceeds the resistance force by the venturi part, and the staying rainwater flows down the venturi part, and generates a negative pressure downward from the venturi part,
A gutter configured to pull down and flow down the accumulated rainwater by the negative pressure generated in the venturi section. The scissors according to claim 1,
The venturi section has a cylindrical member disposed with a gap between the central axis direction in the axial direction of the ridge and a gap between the inner peripheral surface of the ridge and an upper end portion side of the cylindrical member. An eaves characterized in that it is provided with an opening and closing member that is provided integrally and opens and closes the opening on the upper end side of the cylindrical member in accordance with the pressure acting from the accumulated rainwater.

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