JPH09183636A - Double layer glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain double layer glass which shields visual rays and has an excellent thermal insulation characteristic by using ground sheet glass arranged with a surface processed to have ruggedness so as to face opposite to a gap part at the time of obtaining the double layer glass by disposing the gap part between a pair of the sheet glass. SOLUTION: Many spacers 2 spaced apart along the sheet surfaces are interposed between a pair of the sheet glass 1A and 1B and the gap part V between both sheet glass 1A and 1B is hermetically closed under a reduced pressure, by which the double layer glass P is formed. At this time, at least either of the sheet glass 1A and 1B, for example, 1B is composed of the ground sheet glass. The ground sheet glass 1B is so arranged that its surface 3 processed to have the ruggedness faces the side opposite to the gap part V. The surface 3 processed to have the ruggedness is formed on the ground sheet glass 1B by subjecting the front sheet glass to sand blasting, etc., by which the ground sheet glass is finished to the objective ground sheet glass to shut off the visual lines while allowing the passage of light. The spacers 2 are preferably formed of a material (e.g.; stainless steel) having compressive strength of >=5t/cm<2> .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-layer structure in which a heat medium is prevented from being positioned as much as possible in an intervening space between a pair of plate glasses (for example, in vacuum) to improve heat insulation. More specifically, the present invention relates to a double glazing, in which a large number of spacers are interposed between a pair of glass plates along the plate surface, and a space between both glass plates is hermetically sealed under reduced pressure.

[0002]

2. Description of the Related Art Conventionally, in this type of double glazing, the spacer has a small diameter and is inconspicuous so as not to become an obstacle when light passes through, and the pair of glass plates are made of transparent glass plates. Therefore, the spacer interval is set according to the strength of the plate glass so that it is thin as a whole and has a high heat insulating property.

[0003]

According to the above-mentioned conventional double glazing, it is natural that the line of sight through the double glazing cannot be blocked, but depending on the place of use and the purpose of use. However, it is required to be able to block the line of sight even if light passes through. Therefore, as a means for solving this problem, it is conceivable that the plate glass used is, for example, a ground plate glass. However, the picked plate glass has fine irregularities formed on its surface, so the surface state of the picked plate glass to which the above-mentioned spacers abut differs depending on the location,
There is a problem in that the spacers are not stable, and as a result, unexpected stress acts on the frosted glass plate to cause breakage. Further, regarding the sealing treatment of the outer peripheral edge portions of both plate glasses, the unevenness of the picked plate glass tends to be a weak point in sealing, and when the reduced pressure sealed state of the void cannot be maintained, there is a problem that the heat insulating property deteriorates. is there.

Therefore, an object of the present invention is to solve the above problems and provide a double glazing which has a function of blocking the line of sight while allowing light to pass through while maintaining a high heat insulating property for a long time. There is a place to do it.

[0005]

[Means for Solving the Problems]

[Structure] A characteristic structure of the present invention according to claim 1 is that at least one of a pair of plate glasses in which a large number of spacers are interposed between them has a concavo-convex processed surface opposite to a space between both plate glasses. It is composed of a picked glass plate facing the side.

According to a second aspect of the present invention, a coating is provided on at least one surface of a pair of glass sheets in which a large number of spacers are interposed between the glass sheets, the surface facing away from the space between the glass sheets. It is where the film is formed.

[Operation and Effect] According to the characterizing feature of the present invention according to claim 1, at least one of the pair of plate glasses in which a large number of spacers are interposed between the plate glasses is made of a picked plate glass. Because of this, it is possible to block the line of sight while allowing light to pass through (henceforth referred to as the fogging effect). And
The picked glass sheet is arranged so that its uneven surface faces the side opposite to the gap between the two glass sheets. Therefore, the glass sheet surfaces contacted by the spacers are all in a smooth state, and the spacers become unstable. It becomes possible to prevent that.
Therefore, there is less variation in the supporting state of the plate glass by the spacers, and there is no inadvertent breakage due to local stress concentration due to the pressure reduction sealing. That is, it becomes possible to maintain the fogging effect and the heat insulating effect for a long period of time. Furthermore, regarding the sealing treatment of the outer peripheral edge portions of both plate glasses, since the plate glass surface facing the voids is in a smooth state, the close contact state with the sealing material is also good, and a high sealing effect can be obtained. It will be possible.

According to the characterizing feature of the present invention according to claim 2, at least one surface of the pair of glass sheets in which a large number of spacers are interposed between the glass sheets is opposite to the space between the glass sheets. Since a coating film is formed, it is possible to block the line of sight while allowing light to pass by adopting a coating film having two or more kinds of materials having different refractive indexes and having a light scattering property. be able to. And
Compared to forming the coating film on the surface facing the void, maintaining a high degree of vacuum sealing of the void to maintain the fogging effect and the heat insulating effect for a long period of time. It will be possible. That is, if the coating film is arranged so as to face the depressurized void portion, there is a risk that gas is generated from the coating film and the depressurization degree of the void portion is lowered. There is a risk that the coating film intervenes in the seal of the part, the outside air enters from the boundary part thereof, and the sealing degree of the void part decreases.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment] FIGS. 1 and 2 show a first embodiment of a double glazing unit according to the present invention. Both glass plates 1A and 1B with a large number of spacers 2 interposed at intervals.
A space V between them is formed by vacuum sealing.

One plate glass 1A of the pair of plate glasses 1 is made of a transparent float plate glass, and the other plate glass 1B is made of a ground plate glass. The ground sheet glass is arranged so that the uneven surface 3 faces the side opposite to the void portion V. Both plate glass 1 are both float plate glass (thickness: 2.65 m).
Regarding the other plate glass 1B, the float plate glass is subjected to sandblasting, etching, etc. to form the uneven surface 3, and is finished as a picked plate glass that blocks the line of sight while allowing light to pass therethrough. Further, a seal portion 4 of low melting point glass (for example, solder glass) is provided between the outer peripheral edge portions of the both plate glasses 1A and 1B to seal the void portion V. And, the void portion V is, for example, in the production of double-layer glass in a vacuum environment,
Alternatively, it is configured in a state of exhibiting a reduced pressure environment (1.0 × 10 ⁻³ Torr or less) by a method such as suctioning after manufacturing the double glazing. Incidentally, the outer peripheral edge portion of both the plate glasses 1 is formed such that one of the plate glasses is projected along the plate surface direction, and by forming the projecting portion 5, the sealing portion 4 is formed. At the time of forming, the outer peripheral portion of the void V can be efficiently and reliably sealed with the sealing material placed on the protrusion 5.

The spacer 2 has a compressive strength of 5 t / c.
A material of m ² or more is preferable, and in the present embodiment, each is made of stainless steel (SUS304).
If the strength is low, there is a risk that the spacer 2 will be destroyed by the atmospheric pressure acting on the plate glass 1 and the void portion V cannot be formed, and the heat insulating performance will be deteriorated. Moreover, the shape of the spacer 2 is formed in a cylindrical shape, and the shape dimension is
Diameter 0.3mm-1.0mm, height dimension 0.15
It is set to mm to (spacer diameter dimension). And
Since it is formed in a cylindrical shape, a corner portion where stress concentration is likely to occur is not formed in a contact portion with both plate glasses 1, so that the plate glass 1 can be supported in a gentle state and can be hardly broken. . On the other hand, the spacers 2 are respectively installed in the vertical and horizontal directions along the plate surface direction at intervals of 7 mm to (6.5 × sheet glass thickness dimension + 0.5) mm.

[Second Embodiment] FIG. 3 shows a second embodiment of the double glazing of the present invention. As in the previous embodiment, the double glazing P is formed between the pair of glass plates 1. In addition, a large number of spacers 2 are interposed at intervals along the plate surface, and a void portion V between the two plate glasses 1A and 1B is formed under a reduced pressure.

Explaining the structure different from that of the first embodiment, the other plate glass 1B is replaced with a ground plate glass, and a coating film 6 is formed on the surface of the float glass facing the side opposite to the void portion V. It is made of glass. The coating film 6 is made of PbO (32%), SiO
₂ (20%), TiO ₂ (25%), fine powder of metal oxide (5%), and oil component (18%) are coated on the surface of the plate glass 1B, and then 200 to 7
It is formed through a firing process by heat treatment at 00 ° C,
With this coating film 6, it is possible to block the line of sight while allowing light to pass through, as in the case of the above-mentioned pick-and-plate glass.

[Another Embodiment] Another embodiment will be described below.

<1> The ground plate glass is not limited to the one in which the textured surface 3 is formed by subjecting the float plate glass to sandblasting, etching, etc., as described in the above embodiment, but other It is also possible to form it by a known processing method of, and they are collectively referred to as a frosted glass sheet. Further, the textured surface 3 may be textured not only on the entire glass surface but also on a part of the glass surface or a pattern (for example, a lattice pattern). The surface may be patterned with different degrees of unevenness, and they are collectively referred to as a textured surface. <2> The spacer is not limited to the one made of the stainless steel described in the previous embodiment, and may be, for example, Inconel 718, or other materials such as metal / quartz glass / compressive strength of 5 t / m ² or more. Ceramics or the like may be used as long as it has a compressive strength of 5 t / m ² or more and is hard to be deformed so that the two plate glasses do not come into contact with each other due to an external force. <3> The coating film is not limited to the one described in the above embodiment, and may be, for example, an inorganic silicate as a main component to which silica / alumina fine particles are added, or a silicon-acrylic type. A resin whose main component is silica / alumina fine particles added thereto, or the silicone acrylic resin is replaced with a urethane acrylic resin,
Alternatively, a resin containing a fluororesin or an epoxy resin as a main component may be used. In short, it is only necessary that the double glazing has a function of blocking the line of sight while allowing light to pass therethrough. <4> Further, in the double glazing described in the second embodiment, as shown in FIG. 4, another plate glass 1C can be integrally provided on the outside of the coating film 6, and in this case,
Laminated glass is composed of 1B and 1C and the coating film 6, and is further strengthened, and deterioration of the coating film 6 can be suppressed. <5> As described in each of the above-described embodiments, the double glazing of the present invention is not limited to providing the uneven processed surface or the coating film only on the plate glass on one side of the double glazing, and has a void portion. An uneven processed surface or a coating film may be provided on each of the sandwiched plate glasses.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a double glazing unit according to a first embodiment.

FIG. 2 is a cross-sectional view showing the double glazing of the first embodiment.

FIG. 3 is a cross-sectional view showing a double glazing according to a second embodiment.

FIG. 4 is a cross-sectional view showing a double-glazing unit according to another embodiment.

[Explanation of symbols]

 1 Plate Glass 2 Spacer 3 Uneven Processed Surface 6 Coating Film V Void

Claims (2)

[Claims] 1. A number of spacers (2) are interposed between a pair of plate glasses (1) at intervals along the plate surface, and a space (V) between both plate glasses (1) is hermetically sealed under reduced pressure. A certain multilayer glass, wherein at least one of the pair of plate glasses (1) is composed of a frosted plate glass in which an uneven processed surface (3) is arranged so as to face the side opposite to the void (V). Double glazing. 2. A plurality of spacers (2) are interposed between a pair of plate glasses (1) at intervals along the plate surface, and a space (V) between both plate glasses (1) is hermetically sealed under reduced pressure. A certain double glazing, wherein a coating film (6) is formed on at least one of the surfaces of the pair of glazings (1) facing away from the voids (V).