JPH0357274B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is aimed at reducing the internal pressure of double-glazed glass in which the peripheral portions of two glass plates spaced apart from each other are bonded and sealed to provide a sealed air layer inside. The present invention relates to a method for balancing the atmospheric pressure with the outside air pressure at the installation site of the double glazing.

(Prior art) The above-mentioned double-glazed glass is used when there is a large pressure difference between the time of assembly and the installation location, for example, 100m above sea level.
When a product is assembled and manufactured in a sealed state on the following flat land and installed at a high altitude of 1,000 m or more above sea level, at the installation site, due to the expansion of the internal air of the sealed air layer due to fluctuations or decreases in external pressure. If the glass plate becomes bent or damaged, or even if the glass plate does not break, the adhesive or sealing material that joins and seals the glass plate may become fatigued, causing damage such as cracks. There are some inconveniences. Therefore, in order to eliminate this inconvenience, it is necessary to balance the internal pressure of the double-glazed glass during assembly and manufacturing on level ground with the external pressure at the installation site (high altitude). The air layer is depressurized in advance to match the external pressure at the high altitude (installation site). Double-glazed glass with a sealed air layer at atmospheric pressure is manufactured in advance on level ground, and then the pressure is depressurized at the high altitude (installation site). , the following method was used.

(Problems to be Solved by the Invention) However, in the conventional methods as described in and above, the glass plate is likely to be damaged during the depressurization operation, and even if the glass plate is not damaged, the adhesive and sealing material may be strained, resulting in double glazing. In addition, this depressurization operation deforms the glass plate, making it extremely difficult to adjust the internal pressure to an accurate level. There were problems such as the unreliable and troublesome work to depressurize the bed.

(Technical means for solving the problems) The present invention solves the above problems,
The technical means is to bond and seal the peripheral parts of two glass plates 1 and 2 spaced apart from each other to form a sealed air layer 7 inside. In the method of balancing the atmospheric pressure with the outside air pressure, a communication hole 9 communicating between the internal air layer 7 and the outside air is provided in a required part of one of the glass plates 1, and air is allowed to pass through when the double-glazed glass is assembled. A sheet-like filter 10 that prevents the passage of rainwater, dust, etc. is removably attached to the glass plate 1 to cover the communication hole 9, and the filter 10 of the double-glazed glass is removed at the installation site. The communication hole 9 is sealed with another sealing member 12 to form a sealed air layer 7 inside the double-glazed glass.

(Embodiment) An embodiment of the present invention will be described below based on FIG. 1 A and B and FIG. 2 A and B.

The double-glazed glass illustrated here has glass plates 1 and 2 facing each other at a certain interval, and on the periphery thereof,
A hollow spacer 4 containing a desiccant 3 is interposed, and the spacer 4 and the glass plates 1 and 2 are integrally joined with the adhesive 5, and the outer peripheral surface of the spacer 4 and the glass plates 1 and 2 are bonded together. For example, a butyl-based sealing material 6 is filled in between to create a sealed air layer 7 inside.
The inner peripheral wall of the spacer 4 is provided with a plurality of ventilation holes 8 that communicate with the sealed air layer 7, and one corner of the glass plate 1 is provided with a hole that connects the sealed air layer 7 with the outside air. A communicating hole 9 is provided for communication.

As shown in FIGS. 1A and 1B, a sheet-shaped filter 10 is attached to the outer surface of the glass plate 1 so as to cover the outer opening of the communication hole 9 during the assembly and manufacturing of this double-glazed glass. This sheet-like filter 10 allows the passage of air and water vapor, but prevents the passage of rainwater, dust, etc., and is formed into a rectangular shape of an appropriate size, as is clear from Fig. 1A. It is applied around the communication hole 9 on the outer surface of the glass plate 1, and is removably attached with an adhesive tape 11. The sheet-like filter 10 may be a fabric with a microporous film formed by forming a microporous coating film on a base fabric such as synthetic or natural fiber (for example, a fabric known by Toray's registered trademark "Entrant"). used. The diameter of each pore in the coating film is about 0.5 to 3 microns, which is smaller than rain or water droplets, and water vapor (about 0.0004 microns).
Because it is larger, it allows air and water vapor to pass through, but not rainwater or dust. Moreover, the sheet-like filter 10 made of such a microporous film is
When there is no pressure difference, the air permeability is almost zero, and as the pressure difference arises, the air permeability increases. However, the air permeability of each hole is very large, so depending on the dimensions of the double-glazed glass, the filter The area can be set freely. Furthermore, as shown in FIG.
The thickness is 0.5 mm or less, which allows for convenient stacking when transporting double-glazed glass.

The above-mentioned filter 10 is installed at the site by taking the double-glazed glass to a highland, and then peeling off the adhesive tape 11, and after the filter 10 is peeled off, it is installed as shown in Fig. 2 (a) and (b). As shown, another sealing member 12 is attached to seal the outer opening of the communication hole 9, thereby creating a sealed air layer 7 that is substantially sealed while maintaining balance with the external pressure.
In other words, it forms. Note that this sealing material 12 includes a butyl-based sealant 12a and a small disc-shaped outer covering material 12.
a, and is integrally fixed to the glass plate 1 with the communication hole 9 sealed. In this way, when the communication hole 9 is closed and sealed at a high altitude (on-site), the sealing member 12 can be visually confirmed directly through the glass plate 1 or 2, so that the sealing work can be performed reliably.

(Effect of the invention) The present invention provides a glass plate with a communication hole that communicates between the internal air layer and the outside air, and when assembling the double-glazed glass, allows air to pass through but prevents rainwater, dust, etc. from passing through. A sheet-like filter is pasted on the glass plate to cover the communication hole, and the filter is peeled off at the installation site and the communication hole is sealed with another sealing member. Therefore, there is no need to perform the conventional depressurization operation and adjustment operation to balance the internal pressure of the double-glazed glass with the external pressure at the installation site.
Since all you have to do is stick and peel the filter and attach the sealing member, there is no risk of deformation or damage to the glass plate, sealing material, etc. due to depressurization, and the work is extremely simple. There is no risk of rainwater or dust entering the air layer during transport from the factory etc. to the installation site, so there is no loss of product value, and since the filter is in sheet form, it can be transported with multiple layers. It is easy to transport because there is no problem with the stacking of glass on top of each other, and the installation status of the sealing member can be visually confirmed through the glass plate at the installation site, ensuring the reliability of the sealing work. I can do it.

[Brief explanation of drawings]

The drawings show a double-glazed glass for carrying out the method of the present invention. FIG. 1A is a front view showing the assembled state with a filter attached, and FIG.
Figure 2A is a front view showing the state after the filter has been removed and the sealing member has been installed, and Figure 2B is the - line sectional view of Figure 2A.
FIG. 1, 2...Glass plate, 4...Spacer, 6...
Sealing material, 7...Sealed air layer, 9...Communication hole, 1
0... Sheet filter, 11... Adhesive tape, 12... Sealing member.

Claims (1)

[Claims] 1. A method of balancing the internal pressure of double-glazed glass with the external pressure at the installation site of the double-glazed glass, in which the periphery of two glass plates spaced apart from each other is bonded and sealed to form a sealed air layer inside, A communication hole that communicates between the internal air layer and the outside air is provided in a required part of one of the glass plates, and when the double-glazed glass is assembled, it is formed into a sheet that allows air to pass through but prevents rainwater, dust, etc. from passing through. removably affixing a filter to the glass plate to cover the communication hole;
At the installation site, the filter of the double-glazed glass is peeled off and the communication hole is sealed with another sealing member, thereby forming a sealed air layer inside the double-glazed glass. How to balance the internal and external pressures of layered glass.