JP3968765B2 - Architectural glass block and manufacturing method thereof - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an architectural glass block widely used as a wall material excellent in heat insulation, sound insulation, and translucency.
[0002]
[Prior art]
As shown in FIG. 2, a general architectural glass block has a pair of bottomed and uncovered box-shaped shapes, and glass moldings 10 and 10 whose bottoms are translucent surfaces are melted at their open edges. It is a hollow building material that is made by wearing and integrating, and has light-transmitting surfaces 10b and 10b surrounded by frames 10a and 10a on both the front and back surfaces, and is widely used for the outer and inner walls of buildings, verandas, etc. ing.
[0003]
Currently, commercially available glass blocks have dimensions of 145 × 145 × 95 mm, or 190 × 190 × 95 mm, and the wall thickness is the largest from the translucent surface to the frame, toward the welded part. It is getting smaller. In the drawing, 10c indicates a side surface, 10d indicates a welded portion, and 10e indicates the inside.
[0004]
[Problems to be solved by the invention]
Since the welding operation when producing the building glass block is performed in a high-temperature atmosphere, when it is cooled to room temperature after welding, the air confined in the interior contracts, and the internal pressure is about 0.3 atm. Become. Therefore, if the atmospheric pressure is 1 atm, a pressure of about 0.7 atm is applied to the outer surface of the glass block, and the translucent surface is always pressed inward. As a result, a bending moment acts locally near the frame of the translucent surface, and tensile strain concentrates on the outer surface side.
[0005]
It is known that the tensile strain locally generated due to the pressure difference between the inside and outside of the building glass block increases as the surface area of the light transmitting surface of the glass block increases. In the case of a large glass block having a surface area of 600 cm ² or more on the light surface, the tensile strain becomes very large and the glass block is easily broken.
[0006]
In order to increase the pressure resistance of the glass block and prevent the tensile strain from increasing, the thickness should be increased. However, if the thickness of the large glass block is increased too much, the product weight becomes too heavy and should be handled. It becomes difficult. Furthermore, the thickness of the welded portion of a general glass block is about 6 mm. However, when this thickness exceeds a certain value (specifically, 8 mm or more), it cannot be welded satisfactorily. That is, there arises a problem that the welded portion is damaged during annealing after welding, or the mechanical strength of the welded portion is insufficient and cracks occur during construction.
[0007]
Also, if the glass block breaks for some reason, there is a risk of implosion because the pressure is always applied inward due to the pressure difference between the inside and outside, and the impact force increases as the glass block increases in size. Therefore, it is dangerous if such an implosion occurs after construction in a building.
[0008]
The object of the present invention is to prevent cracks and implosion caused by tensile strain concentrated on the outer surface side due to the pressure difference between the inside and outside even in a large glass block having a surface area of one translucent surface of 600 cm ² or more. It is to provide an architectural glass block that can be prevented.
[0009]
[Means for Solving the Problems]
The architectural glass block of the present invention has a pair of bottomed and uncovered box-shaped shapes, and a glass molded body in which the bottom portion is a light-transmitting surface is fused and integrated with each other at open edges. In the block, the glass block has a surface area of one light-transmitting surface of 600 cm ² or more, and a ventilation hole is formed on a side surface of the glass block so that the internal pressure is the same as the atmospheric pressure. Or it is sealed with a moisture-impermeable material made of butyl rubber.
[0011]
[Action]
The architectural glass block of the present invention has a large surface area of one light-transmitting surface of 600 cm ² or more, but a vent hole is formed on the side surface of the glass block. even熔着glass blocks, internal pressure of the glass block is the same as the atmospheric pressure.
[0012]
That architectural glass block of the present invention, since the difference between the internal pressure and the atmospheric pressure of the glass block is zero, even a large glass block, without increasing the glass thickness much, due to the pressure difference It is possible to prevent cracking due to the tensile strain that occurs, and there is no risk of implosion.
[0013]
In addition, the conventional glass block is always pressurized inward due to the pressure difference between the inside and outside, so if exposed to high heat such as a fire, implosion may occur, but the pressure difference between inside and outside is zero. Then, there is no risk of implosion, and excellent fireproof performance can be obtained.
[0014]
The vent hole in the present invention may form a notch in the open end edge portion of one glass molded body, or form a notch in the open end edge portion of both glass molded bodies, so that the notches in each other are formed. You may weld so that it may fit. Moreover, after producing a glass molded body or a glass block, it may be perforated.
[0015]
Furthermore, in the present invention, it is preferable to seal the vent hole with a moisture-impermeable material because condensation can be prevented from occurring inside the glass block and the appearance quality can be kept high. As this impermeable material, any material can be used as long as it has excellent durability and can block moisture from the outside or joint material so that the humidity in the glass block does not increase. An adhesive made of a group-containing polymer, a butyl rubber, or the like is suitable.
[0016]
【Example】
Hereinafter, the architectural glass block of the present invention will be described in detail based on Examples and Comparative Examples.
[0017]
(Example)
First, a pair of glass compacts (300 × 300 × 47.5 mm, open end edge thickness 6 mm) having a bottomed and uncovered box shape was produced by press molding molten glass with a mold. In addition, it shape | molded so that a semicircle notch might be formed in the predetermined location of the open edge part of each glass molded object.
[0018]
Next, each glass molded body is welded and integrated so that the notches are aligned with each other at the open end edges, whereby circular air holes 11a (diameter of about 7 mm) are formed on the side surface 11c as shown in FIG. The formed architectural glass block 11 was produced. The architectural glass block 11 thus produced had a size of 300 × 300 × 95 mm. Furthermore, the ventilation hole 11a of this building glass block 11 was sealed with a moisture-impermeable material 12 in dry air. As the impermeable material 12, a silyl group-containing polymer adhesive was used.
[0019]
When this architectural glass block was subjected to a dew condensation test, no dew condensation occurred inside.
[0020]
(Comparative example)
A pair of glass molded bodies having a bottomed and uncovered box-like shape similar to those of the example was prepared. In addition, the notch was not formed in any glass molded object. Next, each glass molded body was fused and integrated with each other at the open end edges to produce a building glass block.
[0021]
When this architectural glass block was subjected to a dew condensation test, no dew condensation occurred, but when the maximum stress on the outer surface was determined, a tensile strain of 90 kg / cm ² was generated and cracked compared to the product of the example. It was easy.
[0022]
Incidentally, the maximum stress on the outer surface of the glass block of the comparative example was obtained by using a strain gauge method, and after attaching a gauge terminal at a position where the maximum tensile strain of the glass block appears, a through hole is formed in the glass block. And calculated from the measured value when the inside is at atmospheric pressure.
[0023]
In addition, as shown in FIG. 3, the dew condensation test uses a test apparatus having a low temperature chamber and a constant temperature and humidity chamber, and after attaching a glass block to an opening provided between these chambers, The temperature was set to 0 ° C., the temperature of the constant temperature and humidity chamber was set to 20 ° C., the relative humidity was set to 50%, and the glass block was visually observed after 1 hour.
[0024]
【The invention's effect】
As described above, the architectural glass block of the present invention has a vent hole formed on the side surface, so there is no difference between the internal pressure and the atmospheric pressure, and the surface area of one translucent surface is 600 cm ² or more. Even though it is a block, it is possible to prevent cracking and implosion due to tensile strain generated by the internal and external pressure differences without increasing the wall thickness.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an architectural glass block of the present invention.
FIG. 2 shows a general architectural glass block, in which (a) is a perspective view and (b) is a cross-sectional view.
FIG. 3 is an explanatory view showing a dew condensation test apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Glass molding 10a Frame 10b Translucent surface 10c Side surface 10d Welding part 10e Inside 11 Architectural glass block 11a Vent hole 11c Side surface 12 Impermeable material

Claims (2)

In a building glass block having a pair of bottomed and uncovered box-shaped shapes, and a glass molded body whose bottom is a translucent surface is fused and integrated with each other at the open end, the glass block is one of the glass blocks The surface area of the light-transmitting surface is 600 cm ² or more, and a ventilation hole is formed on the side surface of the glass block so that the internal pressure is the same as the atmospheric pressure, and the ventilation hole is made of an adhesive or butyl rubber. A glass block for building, which is sealed with a material. By press-molding molten glass with a mold, it has a box shape with a bottom and no lid, and the surface area of the translucent surface is 600 cm. ² A glass molded body having a notch formed at the open end edge is molded, and then at least one of the glass molded bodies is used as a glass molded body, and a pair of glass molded bodies are fused and integrated with each other at the open edge. A method for producing a building glass block, wherein a glass block having a vent hole formed on a side surface is prepared, and the vent hole of the glass block is sealed with a moisture-impermeable material.

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