JP4518227B2 - Opening structure of building and outer wall panel under the condition that rainwater hits glass surface constantly - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an opening structure of a building under a condition where rainwater constantly hits a glass surface.
[0002]
[Prior art]
The opening of the building is provided for daylighting, and is composed of a light-transmitting shielding material such as glass and a peripheral member. In general, a light-transmitting material such as glass used for the opening is required not only to transmit light but also to be able to see through the spaces separated by the opening. Therefore, if foreign matter such as dust adheres to the glass or the like used here, it will not be possible to satisfy the required performance.Therefore, it is in the opening of a building under the condition that rainwater hits the glass surface constantly. Cleaning is carried out frequently. In particular, in a nearly horizontal opening such as a toplight, the shape tends to accumulate dust, and more frequent cleaning is required.
[0003]
When cleaning, especially for the part facing the outdoors, there are many cases where a safe scaffolding or the like is not ensured, and there is a risk of hanging a gondola or a swing from the rooftop.
[0004]
Cleaning robots may be installed in advance to reduce the time and effort of cleaning, but the cost is considerably high, and cleaning itself accounts for a large percentage of maintenance costs, which is a big problem in managing and operating buildings. ing.
[0005]
Under such circumstances, proposals have been made for easy-maintenance window glass without dirt.
[0006]
That is, in the case of glass, in consideration of the reduction of the cleaning frequency, a surface subjected to a water repellent treatment, and conversely a surface subjected to a hydrophilic treatment is considered.
[0007]
[Problems to be solved by the invention]
However, for the water-repellent-treated one, the ease of cleaning was confirmed as a result of the test, but since the dirt adheres as in the case of the untreated glass, it does not lead to a reduction in the cleaning frequency. Glass with a hydrophilic surface is treated with rainwater to reduce the adhesion of dirt, but the water-repellent component that is eluted from the silicone sealant applied to the glass and sash attachment is treated with a hydrophilic treatment. It has been found that a part that is adhered to the surface and becomes partially soiled occurs, and in any case, it has been found that simply using water-repellent and hydrophilic glass does not directly reduce the cleaning frequency.
[0008]
Furthermore, along with glass cleaning, there is a situation in which cleaning water containing contaminants is transmitted to the lower part of the opening and soils peripheral members, and it is necessary to clean the outer wall together with the glass cleaning.
[0009]
The present invention has been made in view of the above circumstances, and the purpose of the present invention is to eliminate self-cleaning of the glass surface and eliminate secondary contamination of the glass and peripheral members due to the sealing material. An object of the present invention is to provide an opening structure of a building under a condition where rainwater hits a glass surface.
[0010]
In order to achieve the above object, the structure of the opening structure of the building under the condition where rainwater constantly hits the glass surface according to the present invention is a window glass with a superhydrophilic coating agent having a contact angle of less than 10 degrees. subjecting the coated surface treatment, using at least the window glass sash mounting portion of an outdoor side of the sealing material, amorphous sealing material using an elution-free material of the water repellent component, or the elution-free material of the water-repellent component Further, the sash lower frame is provided with a water drainer having a predetermined protrusion from an outer wall having a water return mechanism such as a rising weir at both ends.
[0011]
[Action]
The superhydrophilic surface treatment with a contact angle of less than 10 degrees makes it easy to wet the surface of the window glass with water and to allow dirt to flow away. However, the material is repelled from the sealing material on the outside of the window glass sash mounting part. Since it is an irregular sealing material or a fixed gasket with no elution of water components, there is no insoluble elution of water repellent components, and there is no contamination of the window glass surface.
[0012]
In addition, there is a water return mechanism such as a rising weir at both ends of the lower frame of the sash, and the washing water protruding from the outer wall does not travel along the outer wall, so the outer wall surface is not contaminated.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS.
[0014]
In the figure, reference numeral 1 denotes a window glass contained in a sash frame 2, which is subjected to superhydrophilic surface treatment with a contact angle of less than 10 degrees. Here, “super-hydrophilic surface treatment with a contact angle of less than 10 degrees” means a surface treatment for coating a window glass with a thin film, that is, a window glass surface when a coating agent is applied to the window glass to form a thin film. It means that a superhydrophilic coating agent in which the contact angle of water droplets is less than 10 degrees is used.
[0015]
In order to achieve a super-hydrophilic state with a contact angle of less than 10 degrees, a coating agent capable of exhibiting a photocatalytic effect by containing anatase-type titanium dioxide and a water storage material (such as a siliceous compound) is applied to the surface of the window glass. like to use a material obtained by forming a thin film on. As shown in FIG. 2, such a photocatalytic coating satisfies the condition that the “contact angle is less than 10 degrees”. Under conditions where the contact angle is less than 10 degrees, it has been confirmed that water can easily be washed out by entering water at the interface where the pollutant adheres, and it is possible to remove dust by hitting rain water or simply applying water. .
[0016]
FIG. 2 shows the relationship between “wetability with water” and “rain stain” when the coating agent is a general paint, a hydrophilic antifouling paint, or a photocatalyst coating agent. As shown in FIG. 2, in the case of a general hydrophilic antifouling paint, the contact angle is at most about 20 to 40 degrees. On the other hand, the photocatalyst as described above has extremely high hydrophilicity (superhydrophilicity) of about 0 to 10 degrees, and exhibits extremely high antifouling properties.
[0017]
The photocatalyst exhibits this “super-hydrophilic” antifouling property far superior to that of the antifouling paint.
[0018]
When the photocatalyst is exposed to light, the superhydrophilic function is exhibited, and the effect of facilitating the flow of dirt due to rain can be obtained.
[0019]
In order to obtain a titanium oxide film having high catalytic activity, an anatase type crystal system must be “present in a high ratio (rich)”. In the present invention, this is used, and in addition to this, a water storage substance is used. It is made to stir and "superhydrophilic" is ensured.
[0020]
The sealing material for glazing filled in the gap between the window glass 1 and the sash frame 2 is made of a material that does not “leach water-repellent components” only on the outdoor side , for example, a two-component polysulfide type, a two-component type polyisobutylene type. use of a sealing material or EPDM chloroprene rubber materials were used, PVC, a standard gasket 3 using materials such as silicone. Since there is no fear that the water-repellent component dissolves when it gets wet with water on the indoor side, any non-standard sealing material 3 ′ (or a standard gasket) that adheres to the glass 1 can be applied. And since the commonly used silicone-based sealant is not used on the outdoor side, avoid water-repellent components that volatilize from the same material and avoid the condition that makes it easy to attach lipophilic contaminants. Can do.
[0021]
On the sash lower frame 2a, a drainer 5 protruding about 20 mm from the wall surface 4 is installed longer than the opening width, and rising pieces 5a and 5b are attached to the end portions thereof. Thereby, the dirt adhering to the glass 1 or the drainer 5 is not transmitted to the lower wall surface 4 by rain water or washing water, and the peripheral wall surface is not stained.
[0022]
Thus, when self-cleaning with rainwater can be expected, cleaning is almost unnecessary, and when rainwater does not hit, cleaning can be performed by applying a small amount of water.
[0023]
As a result of one year after exposing the opening of the specified specification to the part where rainwater is applied, cleaning was not performed at all. However, there was no problem in light transmission, and the cleaning frequency could be reduced.
[0024]
【The invention's effect】
Since the present invention is configured as described above, the ultimate easy maintenance of the window glass and the outer wall can be achieved.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a front view of an opening structure of the present invention, and is an end view taken along line bb in FIG.
FIG. 2 is a relationship diagram between wettability with water and rain stains.
[Explanation of symbols]
1; Window glass 2; Sash frame 3; Gasket 3 '; Indefinite sealing material 4; Wall surface 5; Drainer 5a, 5b;

Claims (4)

Subjected to a surface treatment the contact angle on the window glass was coated with a super-hydrophilic coating agent is less than 10 degrees, at least outdoor side of the sealing material of the window glass sash mounting portion, using an elution-free material of the water-repellent component the amorphous sealant, or composed of fixed gasket using no material elution of the water-repellent component, further, the said sash sill of a predetermined projecting from an outer wall having a water flashing mechanism weir such rising at both ends The opening structure of the building and the outer wall panel under the condition that rainwater hits the glass surface constantly, characterized by installing a drainer. The surface treatment applied with a superhydrophilic coating agent with a contact angle of less than 10 degrees contains anatase-type titanium dioxide and a water storage material (silicic acid compound, etc.) as a coating agent, thereby exhibiting a photocatalytic effect. 2. An opening structure and an outer wall panel of a building under the condition that rainwater constantly hits the glass surface according to claim 1, wherein the thin film is formed .
The two-component polysulfide-based sealant or the two-component polyisobutylene-based sealant is used as the amorphous sealant using the material that does not elute the water-repellent component. Opening structure and exterior wall panel of the building under the condition that rainwater hits the glass surface constantly.
The building under the condition that rainwater hits the glass surface constantly according to claim 1, characterized in that EPDM chloroprene rubber, vinyl chloride, or silicon is used as a fixed gasket using a material that does not elute water repellent components. Opening structure of objects and outer panel.

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