JP2016186202A - Joint and drainage structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint capable of discharging rainwater to outside when large amounts of rainwater flow due to localized torrential rain, and suppressing an increase in size.SOLUTION: A flow channel part 13 of a joint 1 is configured so as to extend in a vertical direction with an upper end connectable to an upstream side gutter member and a lower end connectable to a downstream side gutter member. An upper cylinder part 14 of the flow channel part 13 comprises: a throttle part 18 whose flow channel area becomes smaller as it goes downward; and a communication port part 19 that continues to the lower end of the throttle part 18, and opens downward. The throttle part 18 comprises an inclined wall part 20 inclined so as to be positioned frontward as it goes upward from the front end of the communication port part 19. The upper end of a front wall part 23 of a lower cylinder part 15 of the flow channel part 13 is positioned further frontward than the communication port part 19. A drainage port 25 configured so as to open forward for causing water in the flow channel part 13 to overflow to outside is formed between the upper end of the front wall part 23 and the inclined wall part 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a joint and a drainage structure.

  Patent Document 1 discloses a joint that connects an upstream vertical frame and a downstream vertical frame. This joint is composed of a vertical pipe extending in the vertical direction and a branch pipe protruding from the side surface of the vertical pipe. The upstream vertical is connected to the upper end of the vertical pipe, and the downstream vertical is connected to the lower end of the vertical pipe. In this joint, when a large amount of rainwater flows during heavy rain, etc., the rainwater inside the joint overflows from the branch pipe to the outside, and it is difficult for the rainwater to collect on the balcony connected to the vertical side of the upstream side. .

JP 2011-89321 A

  By the way, in the said joint, the branch pipe for overflowing rainwater protrudes largely outward from the vertical pipe, and the whole is easy to enlarge. In addition, it is not preferable in view of the appearance that the joint for connecting the vertical members becomes large in this way, and the installation place of the joint is easily limited.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a joint and a drainage structure that can discharge rainwater to the outside when a large amount of rainwater flows due to concentrated heavy rain, and can suppress an increase in size. And

  In order to solve the above-described problem, the joint of the present invention includes a flow path portion that extends in the vertical direction, has an upper end portion that can be connected to an upstream side member, and a lower end portion that can be connected to a downstream side member. The flow path portion includes an upper tube portion that communicates with the upstream side member, and a lower tube portion that is positioned below the upper tube portion and communicates with the downstream side member. When the flow path area is reduced, and the communication port portion that is continuous with the lower end of the throttle portion and opens downward, and when the direction perpendicular to the vertical direction is the front, the throttle portion is: The lower wall portion includes a front wall portion that faces forward, and the upper end portion of the front wall portion is provided with an inclined wall portion that is inclined so as to be positioned forward from the front end portion of the communication port portion. It is located in front of the communication port and opens forward between the upper end and the inclined wall. Wherein the drainage port for flooding rainwater of the channel portion to the outside is formed.

  Further, the drainage structure of the present invention is a drainage structure including an upstream side member, a downstream side member, and the joint, and the upstream side member is provided at an upper end portion of the flow path portion. And the downstream end member is connected to the lower end of the flow path.

  In the joint and the drainage structure of the present invention, when a large amount of rainwater flows due to concentrated heavy rain, the rainwater in the flow channel overflows through the drainage port. For this reason, it becomes difficult for rainwater to collect on the upstream side of the joint where a balcony or the like exists. In addition, since the drain outlet that overflows the rainwater in the flow path part is formed between the upper end part of the front wall part of the lower cylinder part and the inclined wall part of the throttle part of the upper cylinder part, the joint becomes larger forward. Hateful. For this reason, the enlargement of the joint can be suppressed.

Drawing 1 is an explanatory view of the drainage structure using the joint of a 1st embodiment of the present invention. FIG. 2 is a longitudinal sectional view of a portion A in FIG. FIG. 3 is an exploded perspective view of the joint. 4 is a perspective cross-sectional view of a portion A in FIG. FIG. 5 is a longitudinal sectional view showing a drainage structure using the joint of the second embodiment of the present invention. FIG. 6 is an exploded perspective view of the joint of the second embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

(First embodiment)
FIG. 1 is an explanatory diagram of a drainage structure including the joint 1 of the first embodiment. This drainage structure drains rainwater that has fallen on the balcony 70 of the building 7 into a gutter 80 provided on the ground.

  The drainage structure of this embodiment includes a drain pipe 90, a drainage basin 91, a vertical trough 92, a joint 1, a vertical trough 93, and a rainwater trough 94 as members constituting a drainage path.

  The drain pipe 90 is provided on the balcony 70. The downstream end of the drain pipe 90 protrudes from the outer wall 71 of the building 7 to the outdoor side.

  A drainage basin 91, a vertical frame 92, a joint 1, and a vertical frame 93 are connected to the drain pipe 90 in this order. That is, in this embodiment, the vertical members 92 and 93 are the members connected to the upstream side of the joint 1 and the members connected to the downstream side of the joint 1. Hereinafter, the vertical frame 92 connected to the upstream side of the joint 1 will be referred to as “upstream vertical frame 92”, and the vertical frame 93 connected to the downstream side of the joint 1 will be described as “downstream vertical frame 93”.

  The drainage basin 91, the upstream vertical frame 92, the joint 1, and the downstream vertical frame 93 are arranged along the outer wall 71 in this order from the top. The upstream vertical frame 92 and the downstream vertical frame 93 are fixed to the outer wall 71 using a fixture or the like.

  Rainwater falling on the balcony 70 flows into the rainwater tank 94 through the drain pipe 90, the drainage tank 91, the upstream vertical frame 92, the joint 1, and the downstream vertical wall 93 in this order, and is discharged from the rainwater tank 94 to the side groove 80. Is done.

  FIG. 2 is a longitudinal sectional view of a portion A in FIG. In the following, it is one direction orthogonal to the vertical direction, and the direction indicated by the arrow D1 in FIG. 2 is the front and the direction indicated by the arrow D2 in FIG. explain. In addition, the front and back prescribed | regulated here do not show the direction in the state which installed the coupling 1 and the vertical hooks 92 and 93. FIG. That is, the joint 1 may be installed with the front face facing away from the outer wall 71 as shown in FIG. 1 or may be placed with the front face facing the outer wall 71. Further, the joint 1 may be installed in a state where the front surface is directed in a direction orthogonal to the thickness direction of the outer wall 71 when viewed from above.

  The upstream vertical frame 92 and the downstream vertical frame 93 of the present embodiment are rectangular vertical frames having a substantially rectangular cross section. In addition, the joint 1 may connect the circular vertical sections having a circular cross section.

  As shown in FIG. 3, the joint 1 includes a main body 10, an upper plate 11, and an outer cover 12.

  As shown in FIG. 2, an upper plate 11 is provided at the upper end portion of the main body 10, and the main body 10 and the upper plate 11 constitute a flow path portion 13 extending in the vertical direction.

  The main body 10 includes an upper cylinder portion 14 that communicates with the upstream vertical frame 92 and a lower cylinder portion 15 that is positioned below the upper cylinder portion 14 and communicates with the downstream vertical frame 93. That is, the flow path part 13 includes an upper cylinder part 14 and a lower cylinder part 15.

  The upper plate 11 constituting the upper end portion of the flow path portion 13 is provided on the upper edge portion of the upper cylinder portion 14. The upper plate 11 is coupled to the upper cylinder portion 14 with an adhesive. The upper plate 11 may be fixed to the main body 10 by hooking or fitting without using an adhesive. The upper plate 11 may be formed integrally with the main body 10.

  The upper plate 11 is formed in a substantially rectangular frame shape. In the central portion of the upper plate 11, an upper connection port portion 16 that penetrates vertically and can be connected to the lower end portion of the upstream vertical frame 92 is formed. The upper connection port portion 16 has a substantially rectangular cross section that matches the contour of the lower end portion of the upstream vertical frame 92. The joint 1 is connected to the upstream vertical frame 92 by fitting the lower end of the upstream vertical frame 92 into the upper connection port 16.

  The upper cylinder portion 14 includes an introduction portion 17, a throttle portion 18, and a communication port portion 19 that are formed in order from the top to the bottom.

  The introduction part 17 is formed in a cylindrical shape having a substantially rectangular cross section. The introduction part 17 is concentric with the upper connection port part 16. Further, the introduction portion 17 is concentric with the upstream vertical frame 92 connected to the upper connection port portion 16.

  The four wall portions of the introduction part 17 are vertical, and the channel area (cross-sectional area of the channel) of the introduction part 17 is constant in the vertical direction. A downstream opening 97 of the upstream vertical frame 92 connected to the upper connection port portion 16 is disposed inside the introduction portion 17.

  The throttle portion 18 extending downward from the lower end of the introduction portion 17 is formed in a cylindrical shape having a channel area that decreases toward the bottom. The communication port part 19 is formed in a cylindrical shape and extends downward from the lower end of the throttle part 18.

  A central axis a <b> 1 at the lower end of the throttle unit 18 is located behind the central axis a <b> 2 at the upper end of the throttle unit 18. That is, the lower end portion of the narrowed portion 18 is eccentric rearward from the upper end portion.

  The restricting portion 18 includes an inclined wall portion 20 constituting the front surface. The inclined wall portion 20 is inclined so as to be positioned forward as it goes upward from the front end portion of the communication port portion 19.

  The central axis direction of the cylindrical communication port portion 19 is vertical. The flow passage area of the communication port 19 is constant over the vertical direction. The communication port portion 19 opens downward. The rainwater that has flowed into the introduction portion 17 from the upstream vertical wall 92 reaches the communication port portion 19 via the throttle portion 18 and flows from the communication port portion 19 to the lower cylinder portion 15.

  Of the peripheral wall portion of the throttle portion 18, three wall portions excluding the inclined wall portion 20 extend downward from the corresponding wall portion of the introduction portion 17. These three walls are vertical.

  The lower cylinder portion 15 includes an inflow portion 21 and a lower connection port portion 22 that are sequentially formed downward from the communication port portion 19 of the upper cylinder portion 14.

  The inflow portion 21 is formed in a cylindrical shape having a flow path area that decreases toward the bottom. However, the channel area of the inflow portion 21 is larger than the channel area of the communication port portion 19 in the vertical direction.

  The inflow portion 21 includes a vertical front wall portion 23 facing forward. The upper end of the front wall portion 23 is located at the same height as the lower end of the communication port portion 19. The front wall portion 23 may protrude upward from the lower end of the communication port portion 19. Further, the upper end of the front wall portion 23 may be positioned below the communication port portion 19.

  The upper end portion of the front wall portion 23 is positioned farther forward than the communication port portion 19, and the edge of the front wall portion 23 is cut off. An opening 24 that opens upward is formed between the communication port 19 and the upper end of the front wall portion 23 on the front side. Hereinafter, this opening is referred to as a “first opening 24”.

  The upper end portion of the front wall portion 23 of the inflow portion 21 is located behind the front surface of the introduction portion 17 and is located below the inclined wall portion 20. Between the upper end portion of the front wall portion 23 and the upper inclined wall portion 20, a drain port 25 opened forward is formed.

  The drainage port 25 communicates with the inside of the inflow portion 21 through the first opening 24. For this reason, when a large amount of rainwater flows into the drainage path due to the torrential rain, or when clogging occurs in the drainage path on the downstream side of the upper cylinder part 14, the rainwater in the inflow part 21 flows from the drain port 25 to the channel part. It overflows outside of 13. In this case, the peripheral edge of the first opening 24 becomes an overflow edge.

  Of the peripheral wall portion of the inflow portion 21, the upper ends of the three wall portions 54 and 55 (the rear wall portion 54 and the left and right wall portions 55) excluding the front wall portion 23 are connected to the communication port portion 19. Yes. These three wall portions 54 and 55 are inclined so as to approach the center of the flow path portion 13 as it goes downward. For this reason, as shown by the arrow d1 in FIG. 2, the rainwater flowing into the inflow portion 21 from the communication port portion 19 is smoothly guided to the lower connection port portion 22 by the three wall portions 54 and 55. A first opening 24 is formed between the throttle portion 18 and the upper end portion of the inflow portion 21. For this reason, during normal drainage, rainwater that flows from the upstream vertical frame 92 and travels through the throttle portion 18 is unlikely to be discharged from the first opening 24 and is surely guided to the downstream vertical frame 93.

  As shown in FIG. 4, on the inner surface of the side wall portion 55 of the inflow portion 21, a triangular protrusion extending downward from the first opening 24 is formed at a portion located in front of the communication port portion 19. 38 is formed. The rear surface 39 of the protrusion 38 is inclined so as to be positioned forward as it goes downward.

  During normal drainage, the rear surface 39 of the protrusion 38 is subjected to rainwater that flows into the inflow portion 21 from the communication port portion 19 and then goes around to the first opening 24 side. For this reason, as shown by an arrow d2 in FIG. 4, rainwater that has flowed into the inflow portion 21 from the communication port portion 19 is unlikely to flow toward the first opening 24 side. Accordingly, the rainwater in the flow path portion 13 is suppressed from being discharged from the drainage port 25 during normal drainage.

  In addition, after flowing into the inflow portion 21 from the communication port portion 19, rainwater hitting the rear surface 39 of the protrusion 38 is guided downward along the inclined rear surface 39. For this reason, rainwater flowing into the inflow portion 21 flows smoothly toward the lower connection port portion 22.

  As shown in FIG. 2, the lower connection port portion 22 is formed in a cylindrical shape that extends downward from the lower end of the inflow portion 21. The lower connection port portion 22 is concentric with the introduction portion 17. Further, the lower connection port portion 22 is concentric with the downstream vertical frame 93 connected to the lower connection port portion 22. The channel area of the lower connection port portion 22 is larger than the channel area of the communication port portion 19 and is constant in the vertical direction.

  On the upper portion of the lower connection port portion 22, a flange portion 40 that protrudes outward from the outer peripheral surface of the lower connection port portion 22 is provided. A plurality of position restricting portions 41 protruding downward are provided on the outer peripheral portion of the flange portion 40 in the circumferential direction.

  In the joint 1, the lower connection port portion 22 is fitted inside the upper end portion of the downstream vertical frame 93, and the upper end portions of the downstream vertical frame 93 are fitted inside the plurality of position regulating portions 41, so that the downstream side Connected to the vertical pole 93. In this connected state, the downward movement of the joint 1 is restricted by the flange 40 being placed on the upper end surface of the downstream vertical frame 93.

  As shown in FIGS. 2 and 3, the outer cover 12 is formed in a cylindrical shape that opens up and down. The outer cover 12 is coupled to a flow path portion 13 composed of the main body 10 and the upper plate 11 by an adhesive, and surrounds the periphery of the flow path portion 13. Note that the outer cover 12 may be fixed to the flow path portion 13 by fitting or hooking without using an adhesive. Further, the outer cover 12 may be formed integrally with the flow path portion 13.

  The outer cover 12 includes a box-shaped cover portion 42 opened rearward and downward, side plate portions 43 and 44 extending rearward from the respective side edge portions of the cover portion 42, and rear side plate portions 43 and 44. The rear plate part 45 which connected the edge parts is provided.

  Both side plate portions 43 and 44 of the outer cover 12 are arranged along the corresponding outer side surfaces of the flow path portion 13 (main body 10). The rear plate portion 45 of the outer cover 12 is disposed along the rear surface of the flow path portion 13.

  The cover portion 42 is a U-shaped (substantially C-shaped) cover portion peripheral plate 46 whose horizontal cross-sectional shape opens toward the rear, and a cover portion cover plate 47 that covers the upper side of the inner space of the cover portion peripheral plate 46. It is configured.

  The cover part 42 is distribute | arranged to the front side of the flow-path part 13 (main body 10), and has covered the drain port 25 from the outer side. For this reason, dust such as fallen leaves and rainwater are prevented from entering the flow path portion 13 through the drain port 25.

  A front surface portion 48 that is a part of the cover portion peripheral plate 46 and that forms the front surface of the cover portion 42 is spaced forward from the flow path portion 13 as shown in FIG. A drainage gap 49 surrounded by the main body 10 and the cover part 42 is formed on the front side of the flow path part 13. The drainage gap 49 communicates with the drainage port 25. For this reason, rainwater (overflow water) overflowing from the drain port 25 flows into the drain gap 49.

  An opening 50 surrounded by the flow path portion 13 and the lower end portion of the cover peripheral plate 46 is formed on the front side of the lower portion of the flow path portion 13 (specifically, the lower connection port portion 22). Hereinafter, the opening 50 is referred to as a “second opening 50”.

  The second opening 50 opens downward at a position below the drain port 25. The drainage gap 49 communicates from the second opening 50 to below the cover portion 42. Therefore, rainwater that has flowed into the drainage gap 49 from the drainage port 25 is discharged from the second opening 50 to the outside of the joint 1.

  As described above, the operator fits the lower end portion of the upstream vertical frame 92 into the upper connection port portion 16 provided at the upper end portion of the flow path portion 13, and the lower connection provided at the lower end portion of the flow path portion 13. The mouth portion 22 is fitted into the upper end portion of the downstream vertical frame 93 and the joint 1 is connected to both vertical frames 92 and 93. Thus, in a state where the two vertical beams 92 and 93 are connected by the joint 1, the inside of the upstream vertical beam 92 and the inside of the downstream vertical beam 93 communicate with each other through the flow path portion 13 of the joint 1.

  Rainwater that has flowed into the flow path section 13 from the upstream vertical section 92 is normally discharged to the downstream vertical section 93 via the upper cylinder section 14 and the lower cylinder section 15. When a large amount of rainwater flows into the drainage path due to the heavy rain, the rainwater in the flow path portion 13 overflows into the drainage gap 49 through the first opening 24 and the drainage port 25, and then the second It is discharged from the opening 50 to the outside of the joint 1.

(Second Embodiment)
Next, a second embodiment will be described. In the following description of the second embodiment, components that are the same as those in the first embodiment are denoted by the same reference numerals, and descriptions of common matters are omitted.

  FIG. 5 shows a drainage structure including the joint 1 of this embodiment, and FIG. 6 shows an exploded perspective view of the joint 1 of this embodiment.

  As shown in FIG. 5, in the joint 1 of the present embodiment, the outer cover 12 includes a lower cylinder part 15, and the main body 10 is not provided with the lower cylinder part 15. That is, the flow path portion 13 includes the upper tube portion 14 of the main body 10, the lower tube portion 15 of the outer cover 12, and the upper plate 11.

  In the joint 1 of the present embodiment, the main body 10 includes the cover portion cover plate 47, and the cover portion cover plate 47 is not provided on the outer cover 12. That is, the cover part 42 includes a cover part cover plate 47 of the main body 10 and a cover part peripheral plate 46 of the outer cover 12.

  The cover portion cover plate 47 protrudes forward from the upper end portion of the introduction portion 17 of the main body 10.

  As for the aperture | diaphragm | squeeze part 18 of the main body 10, an upper end part and a lower end part are concentric. In addition, the throttle unit 18 is concentric with the introduction unit 17.

  As shown in FIG. 6, the outer cover 12 includes a cylindrical main body 51 that is opened up and down. The main body 51 has a U-shaped (substantially C-shaped) horizontal cross-section with a horizontal cross-sectional shape opened rearward and opened up and down, and from both sides of the cover peripheral plate 46 to the rear. Side plate portions 43 and 44 extending toward the rear side and a rear plate portion 45 connecting the rear end portions of both side plate portions 43 and 44 are provided.

  As shown in FIG. 5, the outer cover 12 includes a horizontal plate portion 52, a lower connection port portion 22, and a front wall portion 23 in addition to the main body portion 51. The horizontal plate portion 52 protrudes forward from the lower portion of the rear plate portion 45 and is bridged between both side plate portions 43 and 44 of the main body portion 51. A hole 53 penetrating vertically is formed in the central portion of the horizontal plate portion 52.

  The lower connection port portion 22 protrudes downward from the peripheral edge portion of the hole 53 of the horizontal plate portion 52. The front wall portion 23 protrudes upward from the front end portion of the horizontal plate portion 52.

  The lower cylinder portion 15 includes a front wall portion 23, a rear plate portion 45, both side plate portions 43 and 44, a horizontal plate portion 52, and a lower connection port portion 22. The inflow portion 21 of the present embodiment is a portion upstream of the lower connection port portion 22 in the lower cylinder portion 15, and includes a front wall portion 23, a rear plate portion 45, both side plate portions 43 and 44, and a horizontal plate portion 52. It consists of

  The flow passage area from the upper end of the front wall portion 23 of the inflow portion 21 to the horizontal plate portion 52 is the same in the vertical direction and is larger than the flow passage area of the communication port portion 19.

  The upper end of the front wall portion 23 of the inflow portion 21 is located above the lower end of the communication port portion 19. Note that the upper end of the front wall portion 23 may be positioned at the same height as the lower end of the communication port portion 19 or may be positioned below the communication port portion 19.

  The upper end portion of the front wall portion 23 of the inflow portion 21 is located in front of the throttle portion 18, and a first opening 24 that opens upward is formed between the upper end portion of the front wall portion 23 and the throttle portion 18. Has been. Further, the upper end portion of the front wall portion 23 of the inflow portion 21 is located below the inclined wall portion 20, and a drain opening opened forward between the upper end portion of the front wall portion 23 and the inclined wall portion 20. 25 is formed.

  The communication port portion 19 is separated from the inner peripheral surface of the inflow portion 21 to the inner side, and the edge is cut from the inflow portion 21 in the circumferential direction.

  The lower connection port portion 22 is concentric with the communication port portion 19. The joint 1 is connected to the downstream vertical frame 93 by the lower connection port 22 being fitted inside the upper end of the downstream vertical frame 93. In this connected state, the horizontal plate portion 52 is placed on the upper end surface of the downstream vertical frame 93, whereby the downward movement of the joint 1 is restricted.

  The joint 1 of 1st Embodiment and 2nd Embodiment demonstrated above has the following characteristics. The joint 1 includes a flow path portion 13. The flow path portion 13 extends in the vertical direction, and the upper end portion can be connected to an upstream side member (upstream vertical frame 92), and the lower end portion can be connected to a downstream side member (downstream vertical frame 93). . The flow path portion 13 includes an upper cylinder portion 14 that communicates with the upstream side member, and a lower cylinder portion 15 that is positioned below the upper cylinder portion 14 and communicates with the downstream side member. The upper cylinder part 14 includes a throttle part 18 whose flow path area becomes smaller as it goes downward, and a communication port part 19 that is continuous with the lower end of the throttle part 18 and opens downward. When one direction orthogonal to the vertical direction is defined as the front, the throttle portion 18 includes an inclined wall portion 20 that is inclined so as to be positioned forward from the front end portion of the communication port portion 19. The lower cylinder part 15 is provided with the front wall part 23 which faces ahead. The upper end portion of the front wall portion 23 is located in front of the communication port portion 19. Between the upper end portion of the front wall portion 23 and the inclined wall portion 20, a drain port 25 that opens toward the front and overflows the water in the flow path portion 13 to the outside is formed.

  In the joint 1 having this feature, when a large amount of rainwater flows into the drainage path due to heavy rain, the rainwater in the flow path portion 13 overflows through the drainage port 25. For this reason, it becomes difficult for rainwater to collect on the upstream side of the joint 1 where the balcony 70 or the like exists.

  Further, a drain port 25 that overflows rainwater in the flow path portion 13 is formed between the upper end portion of the front wall portion 23 of the lower cylinder portion 15 and the inclined wall portion 20 of the throttle portion 18 of the upper cylinder portion 14. For this reason, the joint 1 is unlikely to become large forward. For this reason, the enlargement of the joint 1 can be suppressed. Thereby, the appearance of the joint 1 is improved, and the installation location of the joint 1 is not easily restricted.

  Moreover, the coupling 1 of 1st Embodiment and 2nd Embodiment has the additional characteristic shown below. The joint 1 includes a cover portion 42 that is provided on the front side of the flow path portion 13 and covers the drain port 25. An opening 50 (second opening 50) for opening downward between the cover portion 42 and the flow path portion 13 at a position below the drain port 25 and discharging rainwater overflowing from the drain port 25 downward. Is formed.

  In the joint 1 having this feature, water overflowing from the drain port 25 is discharged from the opening 50. In addition, since the drainage port 25 is covered with the cover part 42, dust such as fallen leaves and rainwater hardly enter the flow path unit 13 through the drainage port 25.

  Moreover, the drainage structure of 1st Embodiment and 2nd Embodiment has the characteristic shown below. The drainage structure includes an upstream side member (upstream vertical frame 92), a downstream side member (downstream vertical frame 93), and the joint 1 described above. An upstream side member is connected to the upper end portion of the flow path portion 13. A downstream end member is connected to the lower end of the flow path portion 13.

  In the drainage structure having this feature, when a large amount of rainwater flows into the drainage path due to concentrated heavy rain, the rainwater in the flow path portion 13 overflows through the drainage port 25. For this reason, it becomes difficult for rainwater to collect on the upstream side of the joint 1 where the balcony 70 or the like exists.

  In addition, the cover part 42 in 1st Embodiment and 2nd Embodiment is omissible.

  Moreover, although the coupling 1 of 1st Embodiment and 2nd Embodiment is a vertical joint which connects the upstream vertical beam 92 and the downstream vertical beam 93, it is not restrict | limited to this. The member connected to the upstream side and the downstream side of the joint 1 may be, for example, a caller, an elbow, or a drain.

  The drainage structure including the joint 1 is not limited to the drainage of the balcony 70, and may be a drainage structure for draining veranda water, eaves water, and the like.

  In addition, the design of the joint 1 and the drainage structure of the first and second embodiments can be changed as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Joint 13 Flow path part 14 Upper cylinder part 15 Lower cylinder part 18 Restriction part 19 Communication port part 20 Inclined wall part 23 Front wall part 25 Drain outlet 42 Cover part 50 Opening (2nd opening)
92 Upstream edge member (upstream longitudinal member)
93 Downstream member (downstream longitudinal)

Claims (3)

It has a flow path portion that extends in the vertical direction, the upper end portion can be connected to the upstream side member, and the lower end portion can be connected to the downstream side member,
The channel section is
An upper tube portion communicating with the upstream side member,
The lower cylinder part located under the upper cylinder part and leading to the downstream side member,
The upper tube portion is
A throttle part whose flow path area becomes smaller toward the bottom,
Continuing to the lower end of the throttle part, comprising a communication port part opening downward,
When one direction orthogonal to the vertical direction is the front,
The throttle part is
An inclined wall portion inclined so as to be positioned forward as it goes upward from the front end portion of the communication port portion;
The lower cylinder part is
With a front wall facing forward,
The upper end portion of the front wall portion is located in front of the communication port portion, opens forward between the upper end portion and the inclined wall portion, and overflows rainwater in the flow path portion to the outside. A joint characterized in that a drain outlet is formed. The joint is
Provided on the front side of the flow path part, comprising a cover part that covers the drain port,
An opening is formed between the cover portion and the flow path portion so as to open downward at a position lower than the drain port and to discharge water overflowing from the drain port downward. The joint according to claim 1. An upstream edge member,
A downstream edge member;
A drainage structure comprising the joint according to claim 1 or 2,
The upstream end member is connected to the upper end of the flow path portion,
A drainage structure characterized in that the downstream edge member is connected to the lower end of the flow path.

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