Drainage system
The drainage system addresses the issue of leakage and rain entry in buildings by using an eave extension to reduce overhang and eliminate bent pipe connections, resulting in a leak-resistant and maintainable drainage solution.
Patent Information
- Application Number
- JP2023181204
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-10-20
- Publication Date
- 2025-05-02
AI Technical Summary
In buildings with ventilation openings at the top of exterior walls, the large overhang of eaves from the exterior walls leads to increased connections between drain pipes and side gutters, which can result in leakage and rain entering the building through the ventilation opening.
A drainage system design that includes a side gutter at the lower end of the roof, a linearly extending drain pipe connected to the gutter, and an eave extension spaced between the bottom edge of the roof on the opposite side of the trough, reducing the overhang and eliminating the need for bent pipe connections.
The drainage system effectively suppresses leakage from the drain pipe and prevents rain from entering the building through the ventilation opening, while maintaining a simple linear shape for the drain pipe to enhance maintenance and prevent clogging.
Smart Images
Figure 2025070700000001_ABST
Abstract
Description
[Technical field]
[0001] The present invention relates to a drainage system. [Background technology]
[0002] As a drainage system to be installed in a building, such as a factory, that has pillars, exterior walls supported by the pillars, and a roof supported by the pillars, there has been known a drainage system having a horizontal gutter installed at the eaves of the roof and a drainage pipe connected to the horizontal gutter and extending downward from the horizontal gutter (see, for example, Patent Document 1). [Prior art documents] [Patent documents]
[0003] [Patent Document 1] Japanese Patent Application Publication No. 6-229055 Summary of the Invention [Problem to be solved by the invention]
[0004] In some buildings, such as those described above, ventilation openings are provided on the upper part of the exterior wall in order to exhaust the warm air accumulated inside the building to the outside. In buildings with such a configuration, the eaves of the roof need to be significantly extended beyond the exterior wall in order to prevent rain from entering the interior space of the building through the ventilation openings.
[0005] However, if the eaves of the roof are configured to extend significantly beyond the exterior wall, the drain pipe installed along the exterior wall needs to be connected to the horizontal gutter via bends using multiple elbow-type piping, which creates the problem that an increase in the number of connections for the piping could lead to water leakage from the drain pipe.
[0006] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a drainage system capable of suppressing water leakage from drain pipes and suppressing the intrusion of rain into the interior space of a building through ventilation openings. [Means for solving the problem]
[0007] One aspect of the present invention is as follows.
[0008] [1] A drainage system provided in a building having a pillar, an exterior wall supported by the pillar, a roof supported by the pillar, and a ventilation opening provided at an upper portion of the exterior wall, A horizontal gutter provided at the lower end of the roof; A drain pipe connected to the horizontal gutter and extending linearly downward from the horizontal gutter; and an eave extension spaced apart from a lower edge of the roof on the opposite side of the roof from the gutter.
[0009] [2] The drainage system described in [1], wherein the upper surface of the eaves extension portion is inclined so that its height gradually decreases toward the horizontal gutter. Effect of the Invention
[0010] According to the present invention, it is possible to provide a drainage system that can suppress water leakage from drain pipes and also suppress the intrusion of rain into the interior space of a building through ventilation openings. [Brief description of the drawings]
[0011] [Figure 1] 1 is an exterior view showing an example of a building having a drainage system according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an external view of part A in FIG. 1 as seen from outside the building. [Diagram 3] 3 is a cross-sectional view of FIG. 2 taken along line B-B. [Figure 4] FIG. 4 is an enlarged view of part C in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0013] As shown in Figures 1 to 4, a drainage system 1 according to one embodiment of the present invention is installed in a building 6 having pillars 2, an exterior wall 3 supported by the pillars 2, a roof 4 supported by the pillars 2, and a ventilation opening 5 provided at the top of the exterior wall 3.
[0014] The building 6 in which the drainage system 1 is installed is, for example, a factory, but is not limited to this.
[0015] In this embodiment, the building 6 has a plurality of columns 2, and a rectangular exterior wall 3 is fixed to the portions of the columns 2 facing the outside of the building 6. As shown in Figs. 1 and 2, the lower end of the exterior wall 3 is located at a predetermined height from the ground, and the internal space 6a of the building 6 is open to the outside below the exterior wall 3. As shown in Figs. 3 and 4, a gap is provided between the upper end of the exterior wall 3 and the roof 4, and a ventilation opening 5 is formed by the gap. The internal space 6a of the building 6 communicates with the outside of the building 6 through the ventilation opening 5 at the upper side close to the roof 4. The roof 4 is inclined so that the height of its upper surface 4a gradually decreases toward the exterior wall 3, and its lower end 4b is located slightly outside the exterior wall 3.
[0016] The configurations of the pillars 2, the outer walls 3, the roof 4, and the ventilation openings 5 of the building 6 are not limited to those described above, and can be modified in various ways.
[0017] As shown in FIGS. 3 and 4, the drainage system 1 includes a horizontal gutter 7, a drain pipe 8, and an eaves extension 9.
[0018] The gutter 7 is also called a rain gutter, and is provided at the lower end 4b of the roof 4. More specifically, the gutter 7 extends horizontally along the lower end 4b of the roof 4, and is disposed below the upper surface 4a of the roof 4 at the lower end 4b of the roof 4 with its opening 7a facing upward.
[0019] The drain pipe 8 is also called a downspout, and is connected to the horizontal gutter 7 and extends linearly downward from the horizontal gutter 7. More specifically, the drain pipe 8 extends straight along the vertical direction, and its upper end is connected to the lower surface of the horizontal gutter 7. A hole (not shown) is formed in the portion of the horizontal gutter 7 to which the drain pipe 8 is connected, and the drain pipe 8 communicates with the horizontal gutter 7. Although not shown in detail, the lower end of the drain pipe 8 is connected to a drainage facility such as a sewer via a pipe installed underground, for example.
[0020] In this embodiment, a plurality of drain pipes 8 are connected to the horizontal gutter 7. These drain pipes 8 are arranged in pairs of two, and as shown in Figures 2 and 3, each pair of drain pipes 8 is arranged along the pillar 2 and fixed to the pillar 2 by a plurality of fixing hardware 10. Note that the number of drain pipes 8 can be changed in various ways as long as at least one is provided.
[0021] 4, the drainage system 1 may have a filter member 11 at a portion of the horizontal gutter 7 to which the drain pipe 8 is connected. With this configuration, foreign matter can be prevented from flowing into the drain pipe 8 together with rainwater from the horizontal gutter 7.
[0022] The eaves extension 9 is provided on the opposite side of the roof 4 across the gutter 7, with a gap between it and the lower end 4b of the roof 4. More specifically, as shown in Fig. 4, the eaves extension 9 is supported by a cantilever beam member 12 connected to the pillar 2 and is disposed outboard of the exterior wall 3. A gap is provided between the base end 9a of the eaves extension 9 facing the roof 4 and the lower end 4b of the roof 4, and the gutter 7 is disposed below this gap.
[0023] In this embodiment, an opening 9e is provided between the eaves soffit 9d of the eaves extension 9 and the exterior wall 3. This opening 9e communicates with the ventilation opening 5, and the internal space 6a of the building 6 communicates with the outside of the building 6 via the ventilation opening 5 and the opening 9e. In addition, the drain pipe 8 passes through the opening 9e, so that it extends downward without interfering with the eaves extension 9.
[0024] According to the drainage system 1 having the above configuration, as shown by the thick arrow in FIG. 4, rainwater flowing on the upper surface 4a of the roof 4 can be received by the horizontal gutter 7 and drained through the drain pipe 8. Also, as shown by the white arrow in FIG. 4, the internal space 6a of the building 6 can be ventilated through the ventilation opening 5. Moreover, the eaves extension 9 can suppress the intrusion of rain from the ventilation opening 5 into the internal space 6a. That is, according to the drainage system 1 according to this embodiment, the eaves extension 9 is provided on the opposite side of the roof 4 across the horizontal gutter 7, with a gap from the lower end 4b of the roof 4. Therefore, by reducing the amount of overhang of the lower end 4b of the roof 4 from the outer wall 3 and arranging the horizontal gutter 7 in a position close to the outer wall 3, the shape of the drain pipe 8 connected to the horizontal gutter 7 can be made simple and straight, while the eaves extension 9 can suppress the intrusion of rain from the ventilation opening 5 into the internal space 6a. Therefore, the drain pipe 8 can be made straight without a bend using piping such as an elbow, and water leakage from the drain pipe 8 can be suppressed. Furthermore, according to the drainage system 1 of this embodiment, the drainage pipe 8 is linear, which makes it possible to prevent clogging with foreign matter and the like, and also makes it possible to improve the maintainability of the drainage system 1.
[0025] In the drainage system 1 according to this embodiment, it is preferable that the eaves extension 9 is configured so that its upper surface 9b is gradually lowered toward the horizontal gutter 7, that is, so that the base end 9a is positioned lower than the eaves end 9c. With this configuration, in addition to the rainwater flowing over the upper surface 4a of the roof 4, the rainwater flowing over the upper surface 9b of the eaves extension 9 can be received by the horizontal gutter 7 and drained by the drain pipe 8, thereby preventing the rainwater from dripping from the eaves end 9c.
[0026] Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and the above-described embodiment can be modified in various ways without departing from the gist of the present invention. [Explanation of symbols]
[0027] 1. Drainage system 2 Pillars 3. Exterior Wall 4. Roof 4a Top side 4b Bottom edge 5 Ventilation vent 6. Building 6a Interior space 7. Horizontal Gutter 7a aperture 8 Drain pipe 9 eaves extension 9a Proximal end 9b Top side 9c Eaves 9d Eaves 10 Fixtures 11 Filter material 12 Beam member
Claims
1. A drainage system provided in a building having a pillar, an exterior wall supported by the pillar, a roof supported by the pillar, and a ventilation opening provided at an upper portion of the exterior wall, A horizontal gutter provided at the lower end of the roof; A drain pipe connected to the horizontal gutter and extending linearly downward from the horizontal gutter; and an eave extension spaced apart from a lower edge of the roof on the opposite side of the roof from the gutter.
2. The drainage system of claim 1 , wherein an upper surface of the eaves extension is sloped to gradually decrease in height toward the downspout.
Citation Information
Patent Citations
Eaves structure
JP1994229055A