JP4482199B2 - 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. 11 (a) and 11 (b), since rainwater R gathered in the valley of the roof as shown by a two-dot chain arrow due to rainfall is larger than the general part, As shown, it sometimes fell directly onto the lower roof or the ground without flowing into the eaves D. For this reason, as shown in FIGS. 12 (a) and 12 (b), the water return tool A is formed on the eaves bowl D.
[0003]
[Problems to be solved by the invention]
However, the water return tool A as shown in FIGS. 12 (a) and 12 (b) 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-repellent tool formed on the ridges of the corners of the cross eaves of the roof, bent in a round shape, and applied or pasted with a hydrophilic paint or hydrophilic film. In addition to forming a water introduction surface, a water return device is proposed in which a plurality of water flow holes are formed , and a fixed surface is formed in which the upper end corner of the water transfer introduction surface protrudes upward .
[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. In addition to forming the corner portion from the fixed surface 3 protruding upward, the water transfer introduction surface 1 is formed with a water flow hole 1a through which rainwater R flows down to the eaves D. As a raw material, various metal materials and synthetic resin materials are used in addition to a color steel plate, and they are formed by a forming method such as extrusion, roll forming, bending, or press working. 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 eaves C part of the trough which is the cross eaves corner of the roof, and the rain water R collected in the trough is shown in FIGS. 11A and 11B from the cross eaves corner of the roof. ) So as not to jump out.
[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 flowing water hole 1a is formed to flow the rainwater R down to the eaves D and reduce the flow velocity of the rainwater R. Of course, the shape is arbitrary, such as a circle, an ellipse, a triangle, a quadrangle, and a polygon.
[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 rainwater R flows down to the eaves D through the flow holes 1a, and the rainwater R that has not flowed down has a low flow velocity. 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. 10, the water return tool A can be formed.
[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]
FIG. 10 shows a flood return tool A in which a step 9 is formed on the water transfer introduction surface 1 to further reduce the flow rate of the rainwater R.
[0019]
【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 a perspective view showing another example of the water return tool.
FIG. 11 is an explanatory view showing a conventional state.
FIG. 12 is an explanatory diagram 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 Flow hole 2 Drain surface 3 Fixed surface 4 Hydrophilic paint or hydrophilic film 5 Groove 6 Silica sand 7 Convex rib 8 Cover surface 9 Step

Claims (1)

In the flooding return tool formed on the roof of the corner of the cross eaves of the roof, it is bent into a round shape, and a water transfer introduction surface is formed by applying or pasting a hydrophilic paint or hydrophilic film, and a plurality of running water A water return device characterized by forming a hole and forming a fixed surface protruding upward at the upper end corner of the water transfer introduction surface .

Images