JP3117390U - Laminated glass with shading function - Google Patents

Abstract

When an interlayer film itself of laminated glass is provided with a light shielding function using a multilayer stripe light shielding method, the pitch of the stripe becomes fine because the film is thin, and high technology and accuracy are required for printing. In addition, the present invention provides a means for solving the problem that a distant view blur due to light diffraction and interference cannot be seen clearly.
The distance between the outer and inner stripes is printed by printing one surface of the multilayer stripe shading method on the intermediate film of the specifications required for laminated glass and printing the remaining one stripe on the outer surface of the laminated glass. This is a laminated glass with a light shielding function, characterized in that stripes having a practical pitch are formed.
[Selection] Figure 4

Description

  The present invention relates to an improvement of a window glass having a light-shielding function for the purpose of preventing glare and cooling load from direct sunlight and preventing peeping.

Windows with transparent glass plates are widely used to view natural light and outdoor scenery, but direct sunlight increases the cooling load, direct light is dazzling, and it can be seen from the outside. In order to improve this inconvenience, blinds and curtains are widely used. However, since it is an independent structure, it has a drawback of becoming dirty or damaged. In order to remedy this drawback, a multi-layer stripe shading method has been proposed in which stripes for shading are printed on both surfaces of the window glass itself or on both surfaces of a transparent plate provided along the window glass surface.
Japanese Patent Application No. 2005-109285

  In addition, laminated glass that is integrally formed by sandwiching a transparent film made of synthetic resin between two plate glasses so as not to scatter when the window glass is reinforced and broken is put to practical use. A method of incorporating a multilayer stripe shading method into the intermediate film is conceivable. The present invention relates to an improvement of laminated glass using this multilayer stripe shading method.

  The multi-layer stripe shading method applies light refraction so that only a specific direction can be seen through the gap between the stripes printed on both sides of the transparent plate, and the other directions are shielded from the printed stripe. It is a light blocking method configured so that light rays are blocked by the line, but the gap width of the stripe and the width of the blocking line are related to the refractive index of the transparent plate and the thickness of the transparent plate. The gap width is also reduced at the same rate. In general, since the refractive index is about 1.5 for both glass and transparent resin, in the basic specification of the multilayer stripe shading method, the shielding width and gap width are almost the same as the thickness of the transparent plate.

  For this reason, for example, when the multilayer stripe shading method is used for an actual laminated glass comprising two pieces of 3 mm thick glass and an intermediate layer film, if the thickness of the film is 0.1 mm, the shielding width is about 0.1 mm. It is necessary to print stripes having a gap width of about 0.1 mm on both sides of the intermediate layer film. In addition to high accuracy and technology required for printing, the distance between the stripes is reduced, and the distant view seen through the effects of light diffraction and interference appears to be blurred double or triple. Reduce significantly. On the other hand, if the film is made thicker, the glass tends to break due to distortion caused by thermal expansion, the material cost is increased, the transparency of the film itself is affected, and the clarity of the perspective is reduced. Become. An object of the present invention is to provide a laminated glass with a light shielding function which eliminates these disadvantages.

  The laminated glass having a light shielding function of the present invention is such that one surface of the stripe in the multilayer stripe light shielding method is printed on the interlayer film of the laminated glass, and one surface of the remaining stripe is printed on the outer surface of the laminated glass. The above-described problem is solved by configuring.

  In the laminated glass with light shielding function of the present invention, the shielding width and gap width of the stripe can be set regardless of the thickness of the intermediate film, so that it is possible to prevent blurring and distortion of a perspective distant view due to light diffraction and interference. The thickness of the intermediate layer film can be set separately to the thickness originally required for laminated glass. In addition, since a dedicated material other than the printing ink is not required, the laminated glass with a light shielding function is inexpensive and highly practical.

  Conventionally known laminated glass has a structure in which a transparent film is sandwiched between two laminated glasses for the purpose of reinforcement or prevention of scattering at the time of breakage. The surface is printed, and the remaining one surface is printed on the outer surface of the glass.

  FIG. 1 is a cross-sectional view of a window glass for explaining the multilayer stripe shading method (11). Reference numeral 1 denotes a window glass which is a main body. Striped inner stripes 5 and outer stripes 6 each having an opaque strip-shaped shield 3 and a transparent gap 4 are printed on the inner and outer sides of the glass in the depth direction of the screen. Yes. The inner stripe and the outer stripe are printed at the same pitch while maintaining the step α. This step α can be completely shielded from the horizontal direction to the setting sun, for example, with the windows on the higher floors.On the other hand, if you want to set the conditions so that you can see the ground level below the level, the width of the diagonal line is the gap width. Although it is necessary to double this step by the gap width, the required step differs depending on the direction of the installed window and the light shielding conditions.

If the level difference is 0, that is, the printing positions on the inner side and the outer side are the same height and there is no level difference, the landscape on the other side can be seen through the gap between the inner and outer stripes. At the same time, the direct sunlight that is inserted obliquely from above is refracted so as to pass through the glass at the shortest distance according to the refractive index of the glass when entering the window glass. For this reason, most of the direct light entering from the gap between the outer stripes is prevented from traveling by the inner stripe shielding, and cannot reach the indoor side. By appropriately selecting the width of the shield 3 and the width of the gap 4 and the step α between the inner and outer shields, it is possible to arbitrarily adjust the direction and range to be shielded and the direction and range to be seen through. In this way, the multi-layer stripe shading method uses the refractive index of glass to selectively block or transmit light incident from an oblique direction, and divide it into a range that transmits light and a range that blocks light. And a light shielding method that separates directions that can be shielded from light.

  The maximum angle δ at which light incident from directly above an elevation angle of 90 degrees is refracted and travels in the glass is δ = asin (1 / k) where k is the refractive index. There is no traveling light beam. Therefore, when the thickness of the glass is t, the maximum value of the vertical difference c when the light ray g incident from the incident point a reaches the arrival point b on the opposite surface is c = t × tan δ, which is related to the thickness of the glass. In the case of a glass having a refractive index of 1,5, the vertical difference c is about 0.9 times the thickness of the glass.

  Since the width of the shielding wire 3 and the gap 4 is related to the thickness t of the glass, generally, the thicker the glass, the wider the shielding width and the gap width, resulting in a rough stripe. For example, when applying to a widely used glass having a thickness of 3 mm, a standard specification stripe has a shield width of about 3 mm and a gap width of about 3 mm. On the other hand, the coarser the stripe, the more obtrusive it is. However, for fine stripes with a stripe pitch of 1 mm or less, not only high precision and technology are required for printing, but also light diffraction phenomena and interference appear in the lattice stripes, and a distant view However, it is considered that the practical stripe pitch is in the range of 1 mm to 3 mm.

  In the above description, the method of printing stripes directly on the window glass has been described, but it goes without saying that light shielding can be performed in the same manner even when a transparent film printed with stripes is attached to the inside and outside of the glass. It is also possible to print a stripe on both sides of a transparent plate having an appropriate thickness to form a light shielding plate by a multi-layer stripe light shielding method, and to install the light shielding plate along the window glass.

  FIG. 2 shows a cross section of laminated glass integrally formed by sandwiching a transparent intermediate film 2 made of polyester resin between two glass sheets 1a and 1b so that the glass is not splattered for reinforcement for crime prevention. Is shown. In general, a glass of about 3 mm to 5 mm and a film of about 0.05 mm to 1 mm are generally used, such as 3 mm glass + film + 3 mm glass. A method of printing a stripe of a multilayer stripe shading method on this intermediate layer film can be considered, but as described above, as the film becomes thinner, the stripe becomes finer, and high technology and accuracy are required for printing. Distant view blurs due to diffraction and interference, making it impossible to see through clearly.

  The present invention provides a method for securing a light shielding function by a multilayer stripe light shielding method while maintaining the original function of laminated glass. FIG. 3 is a plan view of the laminated glass 1 according to the present invention, and FIG. 4 is a sectional view thereof. In the figure, 1a is an inner glass, 1b is an outer glass, and an intermediate layer film 2 having a predetermined thickness is sandwiched between two glasses as an intermediate layer to obtain the original function of laminated glass such as scattering prevention. In the configuration. 3 is the shielding of the inner stripe 5 printed on the intermediate layer film, 4 is a transparent gap, and p is the pitch of the stripe that is the sum of the shielding width and the gap width. Reference numeral 7 denotes a transparent outer film bonded to the outer surface of the outer glass, and an outer stripe 6 composed of the shielding wire 3 and the gap 4 is printed on the outer film. The outer stripe shielding and gap pitch p are set to be the same as the inner stripe.

  As described above, the laminated glass of the present invention has a configuration in which a stripe is provided with one glass sandwiched between the two methods of simply printing the stripe of the multilayer stripe shading method on both surfaces of the interlayer film of the laminated glass. Since the interval between the outer stripes can be widened, it is possible to prevent blurring of the fluoroscopic image caused by diffraction or interference. If the outer stripe is directly printed on the glass surface, the outer film 7 becomes unnecessary, and a light shielding function can be added without requiring any special material other than the printing ink. Note that if multiple light shielding plates using the multilayer stripe light shielding method are stacked, the width of the light shielding line can be made narrower than the gap width even if the light shielding range is the same, making it easier to see through and natural light. In the same way, if stripes are printed on the three sides of both the outer surface of the laminated glass and the intermediate layer film, it becomes a laminated glass with a light shielding function that makes it easy to see through the light shielding range as it is. .

  The laminated glass according to the present invention can be used alone as a window glass, and can also be used for a double-glazed glass provided with an air layer or a vacuum layer in the middle, or a plate glass incorporated in a double glass.

It is explanatory drawing of the multilayer stripe light shielding method. It is sectional drawing of the conventional laminated glass. It is a top view of the laminated glass by this invention. It is sectional drawing of the laminated glass by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Laminated glass 1a Inner glass 1b Outer glass 2 Intermediate | middle layer film 3 Shading 4 Crevice 5 Inner stripe 6 Outer stripe 7 Outer film δ Maximum refraction angle α Step a Incident point b Arrival point c Vertical difference g Incident light k Refractive index p Stripe Pitch of

Claims (1)

  In a laminated glass that is integrally formed by sandwiching a transparent interlayer film made of synthetic resin between two plate glasses, one surface of the stripe of the multilayer stripe shading method (11) is printed on the interlayer film, and the laminated glass A laminated glass with a light-shielding function, wherein the other surface of the stripe of the multilayer stripe light-shielding method is printed on the outer surface of the glass.

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