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JP-7857190-B2 - Rainwater drainage system and roof structure

JP7857190B2JP 7857190 B2JP7857190 B2JP 7857190B2JP-7857190-B2

Inventors

  • 橋本 昌幸
  • 西本 舞

Assignees

  • パナソニックハウジングソリューションズ株式会社

Dates

Publication Date
20260512
Application Date
20220830

Claims (8)

  1. A rainwater drainage system comprising a sprinkler pipe connected from a downpipe via a first elbow, The sprinkler pipe is provided with at least one opening facing downwards. The lower end of the sprinkler pipe is open, and the area of the sprinkler pipe end is closed by 40 to 80% of the cross-sectional area of the pipe flow path immediately preceding it. Rainwater drainage system.
  2. In the rainwater drainage system according to claim 1, The sprinkler pipe includes a sprinkler pipe body that extends in a straight line and a second elbow connected to the end of the sprinkler pipe body and bent at approximately 90 degrees. The lower end of the second elbow is open, and the area of the end of the second elbow is closed by 40 to 80% of the cross-sectional area of the pipe flow path immediately preceding it. Rainwater drainage system.
  3. In the rainwater drainage system according to claim 1, The outlet angle θ1 of the opening of the sprinkler pipe is such that, with θ1 = 0 degrees vertically downward, the opening is in the range of 0 degrees to 60 degrees toward the front. Rainwater drainage system.
  4. In the rainwater drainage system according to claim 2, The end of the second elbow has its central axis facing forward at an exit angle θ2 within the range of 0 to 60 degrees, with θ2 = 0 degrees vertically downward. Rainwater drainage system.
  5. In the rainwater drainage system according to claim 1, The at least one opening portion is a plurality of opening portions provided at intervals of 200 mm to 500 mm, The inner diameter of each of the aforementioned multiple openings is 75 mm to 100 mm. Rainwater drainage system.
  6. In the rainwater drainage system according to any one of claims 1 to 5, The aforementioned sprinkler pipe drains water onto the upper surface of the lean-to or eaves. Rainwater drainage system.
  7. In the rainwater drainage system according to any one of claims 1 to 5, The aforementioned sprinkler pipe drains into a drainage pit. Rainwater drainage system.
  8. A rainwater drainage system according to claim 1, A roof structure comprising a lower roof or canopy below the sprinkler pipe, from which water is drained by the sprinkler pipe, The aforementioned lean-to or canopy includes a corrugated metal roof, The at least one opening portion is a plurality of opening portions provided at intervals of 200 mm to 500 mm, The pitch of the multiple valleys of the aforementioned folded plate roof, or an integer multiple of the pitch of the multiple valleys, matches the pitch of the multiple openings. Roof structure.

Description

This disclosure relates to a rainwater drainage system and roof structure comprising a sprinkler pipe connected from a downpipe via an elbow. Conventionally, as described in Patent Document 1, the lower end of a downpipe extending downward from the roof of an upper floor of a building is positioned above the roof of the lower floor, and a drainage member is provided at the lower end of the downpipe to diffuse and drain rainwater onto the lower roof. The drainage member is a horizontally elongated rectangular container with a downpipe connection at the top of one end, and multiple rectangular drainage holes are formed on the front, bottom, or both. Japanese Patent Application Publication No. 11-71871 This is a schematic perspective view showing a portion of a building in which the rainwater drainage system of the embodiment is installed.This is an enlarged perspective view of section A in Figure 1.Figure 2 is a schematic diagram of the sprinkler pipe viewed from above.This is a cross-sectional view taken along line B-B in Figure 3.This is a view from arrow C in Figure 3.In this embodiment, the view is from the perspective of arrow D in Figure 3, showing the elbow end.This figure corresponds to Figure 3, which shows a watering pipe in a comparative example.This figure corresponds to Figure 6, showing the elbow termination of the first example of another embodiment.This figure corresponds to Figure 6, showing a second example of an elbow termination in another embodiment.This is a schematic diagram showing another example of a rainwater drainage system according to the embodiment.Figure (a) corresponds to Figure 3 in a rainwater drainage system of another embodiment, and Figure (b) shows part E of (a) viewed in the longitudinal direction of the sprinkler pipe of (a). The embodiments of the rainwater drainage system described herein will be explained below with reference to the drawings. Note that if multiple embodiments or modifications are included below, it is intended from the outset that new embodiments may be constructed by appropriately combining their characteristic features. The shapes, arrangements, numbers, materials, etc., described below are illustrative examples for explanatory purposes and can be appropriately changed according to the specifications of the rainwater drainage system. In all drawings below, equivalent elements are denoted by the same reference numerals. The embodiment will be described using Figures 1 to 6. Figure 1 is a schematic perspective view showing a part of a building 100 in which the rainwater drainage system 1 of the embodiment is installed. The building 100 in which the rainwater drainage system 1 is installed includes an entrance door (not shown), an overhanging canopy 103 that protrudes from near the wall surface 101 above the windows on the first floor, a lower roof 104 which is above the canopy 103, and a main roof 105 which is above the lower roof 104. The main roof 105, the lower roof 104, and the canopy 103 are each formed of folded plate roofing with a corrugated cross-section. The upper surfaces of the main roof 105 and the lower roof 104 are inclined downward toward the eaves, which are the front ends. On the other hand, the upper surface of the canopy 103 is inclined upward toward the eaves. For example, the canopy 103 is suspended and supported by a support member 102 fixed near the corner of the wall surface 101 of the building so as to maintain its inclination. A canopy gutter 14, described later, is attached to the wall surface 101, and the lower end of the canopy 103 is close to the upper end opening of the canopy gutter 14. The rainwater drainage system 1 includes an upper eaves gutter 10 installed at the eaves of the main roof 105, a lower roof eaves gutter 12 installed at the eaves of the lower roof 104, and a canopy gutter 14 installed horizontally along the wall surface 101 near the wall surface 101 below the lower roof eaves gutter 12. The rainwater drainage system 1 further includes an upper sprinkler pipe 20 installed between the upper gutter 10 and the lower roof 104, and a lower sprinkler pipe 40 installed between the lower roof gutter 12 and the canopy 103. The upper sprinkler pipe 20 is connected to the lower side of the first downpipe 15 via a first elbow 16. The upper end of the first downpipe 15 is connected to the upper gutter 10 via a first drain (not shown). Specifically, an opening (not shown) is formed in the bottom plate of the upper gutter 10, and the first drain is attached to this opening. The upper end of the first downpipe 15 is attached to the lower part of the first drain. The lower sprinkler pipe 40 is connected to the lower side of the second downpipe 17 via the first elbow 18. The upper end of the second downpipe 17 is connected to the lower roof gutter 12 via a second drain (not shown). Specifically, an opening (not shown) is formed in the bottom plate of the lower roof gutter 12, and the second drain is attached to this op