JP4814981B2 - Fireproof double glazing - Google Patents

Description

The present invention is a method of laminating a plurality of plate glasses with spacers interposed in the thickness direction over the entire circumference, and interposing a seal layer between the plate glasses and the spacers, The present invention relates to a fireproof multilayer glass in which a sealed space is formed.

  Conventionally, in order to improve the fire-proof performance against fire from the outside, the double-glazed glass forms a sealed space by sealing between glass plates. It has been considered that it is composed of fire-proof glass made of glass sheet glass and that the indoor side glass sheet is composed of ordinary float glass (it is a well-known technique and cannot provide appropriate literature).

  However, in order to form a sealed space by sealing between glass plates, a sealing layer is usually formed between the glass plates using butyl rubber or the like. When the outdoor space is exposed to high heat, such as a fire, flammable gas is generated from the seal layer, and the sealed space is filled with flammable gas. When the glass plate on the indoor side is cracked by the high heat, a high concentration of flammable gas leaks from the crack and flows out into the indoor space partitioned by the double-glazed glass. Since it may cause fire to spread and spread from the ignited flame to the indoor space or spread to the seal layer, it may cause a fire to spread. Performance has been desired.

Therefore, it is conceivable that both the outdoor side plate glass and the indoor side plate glass among the plurality of plate glasses are made of fireproof glass.
However, the plate glass referred to as the fireproof glass is generally expensive, such as a heat-resistant crystallized glass, a low-expansion fireproof glass, and a heat-resistant tempered glass (particularly a high heat strengthening degree of surface compressive stress of 1700 kg / cm ² or more) as well as a meshed glass. As a whole, there was a drawback of high cost.

Therefore, in view of the above circumstances, an object of the present invention is to provide a fireproof double-glazed glass that exhibits high fireproof performance at low cost while maintaining conventional moistureproofness.

In the first characteristic configuration of the present invention, a plurality of plate glasses are laminated with a spacer in the thickness direction over the entire circumference, and a seal layer is interposed between the plate glasses and the spacers. A fireproof double-layer glass in which a sealed space is formed between the plurality of plate glasses, and the first plate glass on the outdoor side of the plurality of plate glasses has a higher degree of thermal strengthening than double- strength glass or double-strength glass. While being comprised with low plate glass, it exists in the point which comprised the indoor 2nd plate glass with plate glass with a higher degree of thermal strengthening than the said double strength glass.

According to this configuration, the first glass sheet outdoor side of the plurality of glass sheets, since than doubled strength glass or fold strength glass are constituted by low thermal strengthening of flat glass by the fire or the like from the outdoor Even if the multi-layer glass is heated, not only is the first plate glass difficult to break, but even if it is cracked, a plate glass with a high degree of thermal strengthening suddenly breaks finely and falls off the holding frame. There is nothing, and it is easy to remain in the holding frame because it is broken like a normal plate glass. Therefore, it is difficult to make a large opening, exerts a heat shielding effect on the second plate glass on the indoor side, and the second plate glass can be obtained from the double-strength glass without using the high heat strengthened plate glass used in the fireproof glass. However, if it is a plate glass with a high degree of heat strengthening, cracks due to fire are unlikely to occur.
Therefore, even if flammable gas is generated from the seal layer due to high heat and the flammable gas is filled in the sealed space, the second glass plate can withstand high heat, and the flammable gas is in the indoor space. Make it difficult to leak.

Therefore, the fireproof double-glazed glass of the present invention can improve the fireproofing performance by an inexpensive plate glass as a whole, and can be used as a window glass or a door which is difficult to be fired even if a fire occurs, and is useful in terms of disaster prevention. is there.
In addition, since a plate glass having a higher degree of thermal strengthening than the double-strength glass is used for the second plate glass on the indoor side, safety against an external force on the indoor side is also improved.

The second characteristic configuration of the present invention is that the double-strength glass is set to a degree of strengthening of a surface compressive stress of 200 kg / cm ² or more and 600 kg / cm ² or less.

According to this configuration, multiple strength glass and consists of those that is set on the surface compressive stress 200 kg / cm ² or more and 600 kg / cm ² or less reinforcement degree, not drop from the holding frame without cracking finely by heating . In other words, when the surface compressive stress exceeds 600 kg / cm ² , it breaks finely and drops off from the holding frame to form a large opening, and even with plate glass having a surface compressive strength of less than 200 kg / cm ² , the overall purpose is achieved. When the surface compressive strength is 200 kg / cm ² or more, it is harder to break due to an outdoor fire.

A third characteristic configuration of the present invention is that the second glass sheet is set to a degree of strengthening of a surface compressive stress of 1200 kg / cm ² or more and less than 1700 kg / cm ² .

According to this configuration, the second glass sheet, to consist things that is set on the surface compressive stress 1200 kg / cm ² or more and 1700 kg / cm ² less than the reinforced degree, if it is less than the surface compression stress 1200 kg / cm ² When the surface compressive stress is 1700 kg / cm ² or more, it is strong against heating but requires a thick glass plate and is expensive and uneconomical.

The 4th characteristic structure of this invention exists in the point which comprised the said 1st plate glass as thickness 3mm-5mm, and comprised the said 2nd plate glass with the plate glass of thickness 3.2mm-5mm .

According to this configuration, than fire retardant glass, fold strength glass, first glass sheet and the second glass sheet, while can crack hardly occurs in a fire, in order to be able to reduce the plate thickness, it can be made lighter as a whole.

It is a longitudinal cross-sectional view which shows the attachment structure of the fireproof multilayer glass of this invention. It is a longitudinal cross-sectional view of the principal part of the fireproof multilayer glass of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, the fireproof multilayer glass of the present invention comprises two sheet glasses 1 and 2 that are laminated with spacers 3 in the thickness direction over the entire circumference of the sheet glass 1 and 2. 1 and 2 and a spacer 3 are interposed between the two glass sheets 1 and 2 to form a sealed space A between the two glass sheets 1 and 2, The one plate glass 1 is made of double strength glass having a thickness of 3 mm to 5 mm, and the second glass plate 2 on the indoor side is made of plate glass having a higher degree of thermal strengthening than the double strength glass having a thickness of 3.2 mm to 5 mm. It is. The fireproof double glazing is fitted and fixed in a sash frame 7 built in the structure.

The double-strength glass is a plate glass standardized by JIS R3222, and is made of a sheet glass manufactured by a float method specified in JIS R3202, or a heat ray absorbing plate glass manufactured by a float method specified by JIS R3208, and surface compression stress. Is manufactured by heat strengthening to a strengthening degree of 200 kg / cm ² or more and 600 kg / cm ² or less. The second plate glass 2 has a surface compression stress of 1200 kg / cm ² or more and 1700 kg / cm with a slightly higher degree of strengthening than normal tempered glass (surface compression stress 900 kg / cm ² or more and less than 1200 kg / cm ² ). less than ² (to hope is ^{1400kg / cm 2 ~1600kg / cm 2} : edge finishing is usually similar to the roving surface finishing of tempered glass) are using a high tempered glass is thermally tempered processed.
The sealing layers 4, 5 are formed between the spacer 3 and the first and second glass plates 1, 2, and the first sealing material 4 between the glass plates 1, 2. The second sealing material 5 is made of polyisobutylene, and the second sealing material 5 is made of polysulfide or silicone.

  The spacer 3 is made of aluminum, is formed in a ring shape over the entire periphery of the peripheral portion of the heat strengthened glass 1, and both lateral surfaces (surfaces facing the first glass plate 1 and the second glass plate 2 in a sectional view). ) Constriction 8 is formed in an O-shape, an opening 9 is formed on the sealed space A side, and a desiccant 10 is filled therein. As a result, the first seal member 4 is easily held by the constriction 8. Further, when the spacer 3 is a non-metallic material typified by resin, the same fireproof performance is exhibited.

The fireproof test of the fireproof multi-layer glass was conducted by the Ministry of Construction Notification No. 1125 No. 2 type B fireproof test.
In the second-class fire prevention test, the specimen is placed in a heated atmosphere at 795 ° C. for 20 minutes. According to it, the multilayer glass of the present invention was found to be acceptable.
In the claims, reference numerals are used for convenience of comparison with the drawings. However, the present invention is not limited to the configurations of the accompanying drawings.
[Another embodiment]
The multilayer glass is not limited to one made of two plate glasses, and may be made of three or more plate glasses.
In addition to the double strength glass, the first glass plate 1 may be a plate glass having a lower degree of thermal strengthening than the double strength glass. That is, in an extreme case, for example, normal float glass may be used, and it is easier to break by heating than double-strength glass, but it may remain in the sash without being broken finely and has a heat shielding effect on the second plate glass.
By providing the multi-layer glass with a heat ray reflective film (Low-E film), an improvement in fire resistance can be expected. In this case, the film is attached to the air layer side (mainly a sputtering film for heat shielding) of the outdoor side glass, but the CVD film attached to the indoor side glass is most preferable in terms of fire prevention performance.
The formed film by sputtering is mainly formed of an Ag film and has good heat ray reflection performance, but is easily oxidized by heating and has poor heat resistance. Therefore, the SnO ₂ film formed by the CVD method can withstand heat of 500 to 600 ° C. If it is formed on the indoor side glass, the temperature difference between the first and second glass sheets is difficult to attach, and there is heat resistance and it is difficult to break.
In addition, the application to the laminated glass is described for reference. The first plate glass made of the double strength glass and the second plate glass made of the highly tempered glass are integrated with a heat resistant intermediate film made of, for example, a fluororesin film interposed therebetween.
In addition, if the heat-resistant intermediate film is made of a resin film that is foamed by heating, the heat shielding performance during a fire is improved.

The spacer 3 is not necessarily made of aluminum but may be made of iron. In such a case, the weight is increased, but the structure is further rich in fire resistance. Further, the shape is not limited to the previous embodiment, and may be a square cross section.
Further, the materials of the first and second sealing materials 4 and 5 are not limited to those of the previous embodiment, and a flame-retardant silicone sealing material is used for the second sealing material 5 to further improve the fireproof performance. Deformation can be performed.
In the embodiment, the first and second sealing materials 4 and 5 are referred to as a sealing layer.

1, 2 Sheet glass 3 Spacer 4, 5 Seal layer A Sealed space

Claims (4)

A plurality of plate glasses are laminated with a spacer in the thickness direction over the entire circumference, and a sealing layer is interposed between the plate glasses and the spacers, thereby forming a sealed space between the plurality of plate glasses. A fireproof double glazing formed,
Among the plurality of plate glasses, the outdoor first plate glass is made of double- strength glass or plate glass having a lower thermal strengthening degree than double-strength glass, and the indoor second plate glass is heated more than the double-strength glass. Fireproof double-glazed glass composed of highly strengthened sheet glass. ^2. The fireproof multilayer glass according to claim 1, wherein the double-strength glass is made of a material having a surface compressive stress of 200 kg / cm ² or more and 600 kg / cm ² or less. The fireproof multilayer glass according to claim 1 or 2, wherein the second glass sheet is made of a material having a surface compression stress of 1200 kg / cm ² or more and less than 1700 kg / cm ² . The fireproof multi-layer glass according to any one of claims 1 to 3, wherein the first plate glass has a thickness of 3 mm to 5 mm, and the second plate glass is formed of a plate glass having a thickness of 3.2 mm to 5 mm.

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