JPH06229172A - Double layer glass - Google Patents

Abstract

PURPOSE:To improve heat insulating performance, reduce the number of components and improve the assembly workability and durability. CONSTITUTION:A double layer glass 1 is formed such that a square spacer 6 being hollow and filled with a drier 4 and having vent holes 5 formed in an inner peripheral surface is located in an airtight state between the outer peripheries of two glass sheets 2. A spacer 6 is formed of an extrusion-molded material of glass fiber-reinforced polycarbonate resin and corner parts are obliquely cut and butt-welded. A gap between the spacer 6 and the glass sheet 2 and the outer periphery of the spacer 6 are filled with a sealant 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double glazing, and more particularly to a double glazing in which a spacer interposed between two glass plates is improved to improve heat insulation and assembling workability.

[0002]

2. Description of the Related Art A double-layered glass in which a hollow space between two glass plates is filled with a desiccant, and a rectangular spacer having air holes formed in the inner peripheral surface is provided in an airtight state. Is already known (see JP-A-55-92492).
This double glazing is superior in heat insulating property than ordinary glass,
Moreover, since the internal closed space is dried by the desiccant, it is difficult to cause dew condensation.

By the way, the above-mentioned double-glazing spacer is
Generally, it is composed of a hollow unit member formed by roll forming of a metal plate such as aluminum. In this case, the spacer unit member is cut corresponding to the length of each side of the glass plate, and the end portions of the adjacent unit members 20 are connected via the L-shaped corner block 21 as shown in FIG. As a result, a rectangular spacer is assembled.

[0004]

However, in the above-mentioned double glazing, since the spacer is made of metal, the thermal conductivity is high and the heat insulating performance is limited. Further, since the spacer has to be assembled using the corner block 21 as described above, there are problems that the number of parts is large, the assembling workability is poor, and a gap is generated in the joint portion of the corner portion, and the durability is poor. there were. A double glazing using a sealer made of an unvulcanized rubber-based material as a spacer has also been proposed (see Japanese Utility Model Publication No. 43-7336), but this requires that a capsule containing a desiccant is separately attached to the spacer. In addition to the above, there is a problem in that the spacer has a higher linear expansion coefficient and a lower strength than those made of a metal, and is inferior in durability.

Therefore, an object of the present invention is to provide a double glazing which can improve the heat insulating performance, reduce the number of parts, and improve the assembling workability and durability.

[0006]

In order to achieve the above-mentioned object, the double glazing of the present invention comprises:
A double-layer glass, which is hollow and filled with a desiccant inside, and has a rectangular spacer having an air hole formed in the inner peripheral surface thereof in an airtight state, wherein the spacer is an extruded glass fiber reinforced polycarbonate resin. It is characterized in that it is formed of a material, the corners thereof are obliquely cut and welded by butt welding, and a seal material is filled between the spacer and each glass plate and on the outer periphery of the spacer.

[0007]

According to the above structure, the glass fiber reinforced polycarbonate resin forming the spacer has excellent strength and heat resistance and low linear expansion coefficient and thermal conductivity. It is possible to obtain a double glazing having a higher heat insulating property than the one using the spacer made of. Also,
While the spacer is formed by extruded profile of glass fiber reinforced polycarbonate resin, since the corner portion is obliquely cut and butt welded, unlike a spacer assembled using a corner block, the number of parts is small, Excellent assembly workability and durability, mass production is possible, and manufacturing cost can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a multi-layer glass, and the multi-layer glass 1 has a hollow space (hollow part) 3 filled with a desiccant 4 between the outer peripheries of two glass plates 2 to form an inner peripheral surface. Vent hole 5
A rectangular spacer 6 having a groove is formed in an airtight manner. The spacer 6 is formed of an extruded shape material of glass fiber reinforced polycarbonate resin, and its corner portion is obliquely cut and welded by butt welding (FIG. 5).
reference). In this case, the glass fiber reinforced polycarbonate resin is formed by mixing 10% by weight of glass fiber into the polycarbonate resin, and the reason why the mixing ratio of the glass fibers is 10% is that the hardness increases when the glass fiber reinforced polycarbonate resin is more than that. This is because extrusion molding becomes difficult. As the resin (engineer plastic) forming the spacer 6, various fiber reinforced resins mixed with various fibers such as glass fiber and carbon fiber are conceivable. However, the glass fiber reinforced polycarbonate resin has the strength and heat resistance. It was selected because of its excellent properties and low linear expansion coefficient and low thermal conductivity.

As shown in FIG. 2, the spacer 6 is formed in a hollow shape having a substantially convex cross-section, and a plurality of linear grooves 7 are formed on both sides of the spacer 6 in order to improve adhesion with a sealing material described later. It is preferable that a step portion 8 that is formed in the same direction and that rises in a stepwise manner from both sides toward the center is formed on the outer peripheral side portion. The spacer 6 is sandwiched between the two glass plates 2, and a sealing material 9 is filled between each glass plate 2 and the spacer 6 and on the outer periphery of the spacer 6. The seal material 9 is preferably a seal material, such as butyl rubber, which is unlikely to chemically change with the material of the spacer 6.

Next, a method for manufacturing the above double glazing 1 will be described. First, a material for a spacer (extruded profile) 10 made of glass fiber reinforced polycarbonate resin having a predetermined cross section continuous in the longitudinal direction is molded by an extruder. Next, on the bottom surface of the spacer material 10 (inner peripheral surface of the spacer),
As shown in FIG. 3, the ventilation holes 5 are formed at appropriate intervals in the longitudinal direction using the sewing machine needle 11. Next, the spacer material 10 is cut into a length corresponding to each side of the glass plate 2 to form a spacer unit member 12, and at that time, a corner portion 13 of the spacer 6 has a butt structure. , Both ends of each unit member 12 are cut obliquely (45 °) to form an inclined end portion 14 (see FIG. 4).

Next, as shown in FIG. 4, the unit member 12 is
The hollow part 3 is filled with a desiccant 4 such as granules, and the sponge 15 has air permeability at both ends so that the desiccant 4 does not spill out.
Then, the end portions 14 of the unit members 12 are welded together by a heat welding machine to assemble the rectangular spacers 6 as shown in FIG. It should be noted that instead of filling each unit member 12 with the desiccant 4 in advance, for example, after welding the three corner portions of the spacer 6 by welding, the desiccant 4 is communicated in the circumferential direction from the open ends of the remaining corner portions. The entire space of the hollow portion 3 of the spacer 6 may be filled, and the remaining corner portions may be welded.

Since burrs are generated at the welded portion, the spacer 6
The burrs 16a protruding on both sides of the are removed (see the lower right corner of FIG. 5). The burr 16b protruding to the outer peripheral side
Since it is covered with a secondary sealing material described later, it does not have to be removed. Next, as shown in FIG. 6, a primary sealing material (butyl rubber, 110 to 130 ° C.) 9a is applied to both sides of the spacer 6, and two glass plates 2 are brought into close contact with each other as shown in FIG. As shown in FIG. 2, a secondary sealing material (butyl rubber or hot melt) is provided on the outer periphery of the spacer 6 between the glass plates 2.
By filling 9b, the double glazing 1 with a sealed inside is completed. In addition, in FIG. 6 and FIG. 7, 18 is a sealing material application nozzle.

According to the double glazing 1 having the above structure, the spacer 6 interposed between the two glass plates 2 is formed of an extruded shape of glass fiber reinforced polycarbonate resin, and the glass fiber reinforced polycarbonate resin is used. However, since it has excellent properties such as strength and heat resistance and a low coefficient of linear expansion and thermal conductivity, it is possible to obtain a double glazing 1 having a higher heat insulating property than that using a spacer made of metal or mere resin. To be Further, since the spacer 6 is formed of an extruded shape material of glass fiber reinforced polycarbonate resin, and the corner portion 13 thereof is obliquely cut and welded by butt welding, unlike a spacer assembled by using a corner block, a component The number of points is small, the workability in assembly and durability are excellent, mass production is possible, and the manufacturing cost can be reduced.

[Comparative Example 1] A glass fiber reinforced polycarbonate resin (10% of glass fiber) (hereinafter referred to as an Example resin material) used for the spacer 6 of the above Example and a general extruded resin material (PVC). ) (Hereinafter referred to as a general resin material) is shown in Table 1 when compared with each other. It can be seen that the resin materials of Examples are superior to the general resin materials in the tensile strength, bending strength, linear expansion coefficient and Vicat softening point temperature.

[0016]

[Table 1]

[Comparative Example 2] Using the double glazing 1 of the above example, a test body 17 having a large multi glazing 1a and a small multi glazing 1b mounted thereon was formed as shown in FIG. Was set to 1 to 10, and a heat insulation performance test was conducted with a test body of the same structure made of ordinary double glazing using a metallic spacer. As a result, the test results shown in Table 2 were obtained. In this case, the test body 17 is Meister MIX4.
560, glass thickness 3-A12-3 is used. The above test was conducted by setting the indoor side to 20 ° C and the outdoor side to 0 ° C. In Table 2, the average value (° C) of three measurements is shown, and the heat transmission coefficient (Kcal / m ² h ° C) is also shown.

[0018]

[Table 2]

As is clear from Table 2, one of the double glazings of the example has a heat insulating property of 0.
It was found that the temperature was improved to 16 Kcal / m ² h ° C., the indoor glass surface temperature was increased, the dew condensation prevention performance was improved, and a remarkable effect is obtained particularly in the small double glass 1b.

[0020]

In summary, according to the double glazing of the present invention, a desiccant is filled in the hollow inside which is provided between the outer peripheries of two glass plates in an airtight state, and the inner peripheral surface has ventilation holes. The square spacer is formed by extruded glass fiber reinforced polycarbonate resin, and its corners are cut diagonally and welded by butt welding to seal between the spacer and each glass plate and the outer periphery of the spacer. Since the material is filled, the heat insulating performance can be improved, the number of parts can be reduced, and the assembling workability and the durability can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a double glazing which is an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a spacer in FIG.

FIG. 3 is a perspective view showing a state where a vent hole is formed in a spacer.

FIG. 4 is a partial cross-sectional side view showing a state in which a spacer is filled with a desiccant.

FIG. 5 is a front view of a state in which a spacer is assembled by heat welding.

FIG. 6 is a side view showing a state in which a primary sealing material is applied to the spacer.

FIG. 7 is a side view showing a state where glass plates are closely attached to both sides of a spacer.

FIG. 8 is a side view showing a state where the outer periphery of the spacer between the glass plates is filled with the secondary sealing material.

FIG. 9 is a front view of a test body in the case of performing a heat insulating performance test of double glazing.

FIG. 10 is a partially exploded perspective view of a spacer used in a conventional double glazing.

[Explanation of symbols]

 1 Double-Layered Glass 2 Glass Plate 4 Drying Agent 5 Vent Hole 6 Spacer 9 Sealing Material

Claims (1)

[Claims] 1. A double-glazing unit comprising two glass plates, each of which has a hollow space between the outer peripheries thereof, a hollow spacer filled with a desiccant, and an inner peripheral surface of which is provided with a ventilation hole in a hermetically sealed state. The spacer is formed by extruding a glass fiber reinforced polycarbonate resin, and its corners are obliquely cut and welded by butt welding, and a sealing material is provided between the spacer and each glass plate and on the outer periphery of the spacer. A double glazing characterized by being filled with.