JP4482198B2 - Water return tool - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a flood return device that is attached to a corner of an eaves of a roof and is formed so that rainwater collected in a trough of the roof flows smoothly into the trough.
[0002]
[Prior art]
Conventionally, as shown in FIGS. 10 (a) and 10 (b), the rainwater collected in the valley of the roof as shown by the two-dot chain line arrow due to the rain is larger than the general part, and thus is indicated by the dotted arrow. In some cases, it would fall directly into the lower roof or ground without flowing into the fence. For this reason, as shown to Fig.11 (a), (b), the water return tool was formed in the jar.
[0003]
[Problems to be solved by the invention]
However, the water return tool as shown in FIGS. 11A and 11B is inferior in aesthetics because it is exposed to the outside. In addition, there was a risk of damage during snowfall.
[0004]
[Means for Solving the Problems]
In order to eliminate such drawbacks, the present invention is a water return tool formed on the roof of the corner of the cross eaves of the roof, bent in a round shape, and applied or pasted with a hydrophilic paint or hydrophilic film. A water return device that forms a water introduction surface and a step substantially perpendicular to the direction of water flow on the water introduction surface, and a fixed surface that protrudes upward from the upper end corner of the water introduction surface. This is a proposal.
[0005]
【Example】
Below, the water return tool which concerns on this invention is demonstrated in detail using drawing. FIG. 1, FIG. 2 (a), (b) is explanatory drawing which shows an example which used the flood return tool A for the trough which is the cross eaves corner part of a roof, and the flood return tool A, the roof material B, It is composed of a trough C, eaves D, and eaves fixture E. Α is a roof base, β is a fixture, and R is rainwater.
[0006]
As shown in FIG. 3, the water return tool A has a water transfer introduction surface 1 bent in an R shape, a draining surface 2 projecting inward from the lower end of the water transfer introduction surface 1, and the tip of the water transfer entrance surface 1. The corner portion is formed from a fixed surface 3 projecting upward, and the water transfer introduction surface 1 is formed from a step 1a formed substantially at right angles to the flowing direction of the rainwater R. As a raw material, various metal materials and synthetic resin materials are used in addition to a color steel plate, and the material is formed by a forming method such as extrusion, roll forming, bending, or pressing. Moreover, FIG. 4, FIG. 5 is explanatory drawing which shows the state before the flood return tool A construction.
[0007]
The water return tool A is formed in the eaves C portion of the trough which is the corner of the roof eaves, and the rainwater R collected in the valley is shown in FIGS. 10A and 10B from the corner of the eaves of the roof. It is formed so as not to jump out as shown in FIG.
[0008]
As shown in FIG. 2 (b), the water transfer introduction surface 1 flows down the valley, gradually increases the amount of rainwater R along the round shape, and falls into the eaves C.
[0009]
The step 1a is formed at a substantially right angle to the flowing direction of the rainwater R, and is formed to reduce the flow velocity of the rainwater R.
[0010]
The draining surface 2 promotes the rainwater R falling, and the fixing surface 3 is a portion for fixing the water return tool A to the roof base α.
[0011]
6 (a) to 6 ( b ) show a case where (a) is a coating or sticking of a hydrophilic paint or hydrophilic film 4 on the substrate of the water return tool A, ( b ) is silica sand or the like 6 And a hydrophilic paint or hydrophilic film 4 is applied or adhered to the surface.
[0012]
Further, when plastic or the like is used as a material, the same effect can be obtained if a material that improves hydrophilicity such as an antistatic agent is incorporated. The feature of the hydrophilic coating or a hydrophilic film 4 such as a hydrophilic material, as shown in FIG. 6 (c), (1) A high hydrophilicity, the contact angle of the contact surface and the water droplet (rainwater R) theta As the contact angle θ increases as shown in FIG. 6 ( d ), the water repellency increases. The range called hydrophilicity is 0 degree ≦ θ ≦ 60 degrees. (2) If the contact angle θ decreases, the contact area with the contact surface increases even if the volume of water is the same. (3) When water flows on the slope, the larger the contact area, the greater the resistance and the slower the flow velocity. (4) Because of this, rainwater R is less likely to jump out from the eaves. Etc.
[0013]
Next, a construction example of the water return tool according to the present invention will be briefly described. Assume that the water return tool A as shown in FIG. 3 is formed in the valley as shown in FIGS. As shown in FIG. 2A, the fixing surface 3 is fixed to the roof base α by the fixing tool β. In this case, the fixing surface 3 can be fixed to the surfaces of both roof bases α in the valleys. That is all.
[0014]
Next, the operation of the water return tool according to the present invention will be further described. When the rainwater R flows as shown by the dotted arrows in FIG. 1 and FIG. 2B, the flow rate of the rainwater R becomes slow due to the step 1a. Thereafter, the rainwater R flows along the water transfer introduction surface 1 of the water return tool A and flows down to the eaves D. When flowing down along the round shape of the water transfer introduction surface 1, the water flows inward from the vertical line B direction due to the Coanda effect and the teapot effect which are the characteristics of the fluid.
[0015]
What has been described above is only one embodiment of the water return device according to the present invention, and FIGS. 7 (a) to (j), FIGS. 8 (a) to (c), and FIGS. 9 (a) to (c). As shown in FIG.
[0016]
7A to 7J show cases where the water transfer introduction surface 1, the draining surface 2, and the like are variously changed.
[0017]
8 (a) to (c) and FIGS. 9 (a) to (c) are cases in which the water transfer introduction surface 1, the draining surface 2, the fixing surface 3 and the like are variously changed, and particularly FIG. 9 (b), (C) is the water return tool A in which the cover surfaces 8 are formed at both ends.
[0018]
【The invention's effect】
As described above, according to the flooded return tool according to the present invention, (1) durability of the eaves can be improved by preventing damage to the eaves by snow or the like. (2) The water return tool can be used even in snowy areas. (3) It is possible to continuously exert the above-described effects by adopting a step forming, a shape in which the Coanda effect, the teapot effect function effectively, a hydrophilicity improving material, etc. (4) Rainwater does not jump out from the valley and flows smoothly into the eaves. (5) It is not visible from the outside and has good aesthetics. There are features and effects.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a construction state of a flood return tool according to the present invention.
FIG. 2 is an explanatory view showing a construction state of the water return tool according to the present invention.
FIG. 3 is an explanatory view showing a water return tool according to the present invention.
FIG. 4 is an explanatory view showing a state before constructing the water return tool according to the present invention.
FIG. 5 is an explanatory view showing a state before constructing the water return tool according to the present invention.
FIG. 6 is an explanatory view showing another example of the water return tool.
FIG. 7 is an explanatory view showing another example of the water return tool.
FIG. 8 is an explanatory view showing another example of the water return tool.
FIG. 9 is a perspective view showing another example of the water return tool.
FIG. 10 is an explanatory diagram showing a conventional state.
FIG. 11 is an explanatory view showing a conventional state.
[Explanation of symbols]
A Water return tool B Roof material C Valley wall D Eave wall E Eave wall attachment R Rainwater α Roof base β Fixture 1 Water transfer introduction surface 1a Step 2 Drain surface 3 Fixed surface 4 Hydrophilic paint or hydrophilic film 5 Concave Groove 6 Silica sand 7 Convex rib 8 Cover surface

Claims (1)

In the water return tool formed on the eaves at the corner of the crossing eaves of the roof, the water transfer introduction surface is formed by bending into a round shape and applying or sticking a hydrophilic paint or hydrophilic film. A water return device characterized by forming a step substantially perpendicular to the flowing water direction on the surface and forming a fixed surface protruding upward at the upper end corner of the water transfer introduction surface .

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