JP5812416B2 - Fireproof double glazing - Google Patents

Description

  The present invention relates to fireproof double glazing.

  Among the double-glazed glass, what is called fire-proof double-glazed glass is such as at least one of the glass plates constituting the fire-proof double-glazed glass, such as netted glass, heat-resistant tempered glass, low expansion tempered glass, transparent crystallized glass, etc. This refers to the use of heat and fireproof glass plates.

  In addition, a general multilayer glass is formed by separating at least two glass plates facing each other through a spacer, and separating each side surface of the spacer facing these two glass plates with a primary sealing material. Each of the glass plates is bonded to each other to form a hollow layer between the two glass plates, and the outside of the primary sealing material is sealed with the secondary sealing material.

  This primary sealing material is an indispensable component for maintaining the dry state of the hollow layer of the double-glazed glass, and is an organic butyl sealing material having good adhesion to the glass plate and high moisture permeability resistance ( Butyl rubber) is generally used. Moreover, also in the fireproof multilayer glass mentioned above, the same butyl-type sealing material is used as a primary sealing material.

  As described above, at least one fireproof multilayer glass is a heat-resistant and fireproof glass plate, and the other is a normal glass (soda lime glass) plate, and these glass plates are separated by a spacer to form a predetermined air layer. And the periphery thereof is sealed with a sealing material.

  By the way, in the case of a fire, among the glass plates constituting the fireproof multilayer glass, the heat-resistant fireproof glass plate is on the fire occurrence side (hereinafter referred to as the heating surface side), and the normal glass plate is not on the fire occurrence side (hereinafter referred to as non-fired side). If the normal glass plate on the non-heated surface side breaks or falls off due to high heat, it is exposed to the air and is exposed to air. The sealing material itself may burn, and there is a risk that a fire may occur on the non-heated surface side.

  Therefore, the fireproof double-glazed glass of Patent Document 1 forms an inner surface sealing material layer on the inner side of the primary sealing material, and the fire resistance and flame retardancy is enhanced by the inner surface sealing material layer.

  In addition, the fireproof double-glazed glass of Patent Document 2 is fireproof and flame retardant by interposing a moistureproof seal material between a primary seal material composed of a layer of flame retardant tape and a flame retardant secondary seal material layer. Increases performance.

  Furthermore, the fireproof double-layer glass of Patent Document 3 is composed of a glass plate other than the heat-resistant fireproof glass plate, and is heat strengthened in the thickness direction even if the multi-layer glass is heated by a fire or the like. By interposing the glass, the heat strengthened glass blocks the flame without breaking and improves the fireproof performance.

JP 7-237941 A JP 2001-12157 A Japanese Patent No. 3121206

  However, the fireproof double-glazed glass of Patent Documents 1 and 2 must be provided with an inner surface sealing material layer and a moisture-proof sealing material in addition to the primary sealing material and the secondary sealing material, respectively. There was a problem that was difficult.

  Moreover, in these sealing parts, a sealing part may become large compared with general multilayer glass, and the problem may arise in the designability.

  Moreover, although the fireproof double-glazed glass of patent document 3 comprises the glass plate of the side which is not a heat-resistant fireproof glass plate with the heat strengthened glass, when heat strengthening glass is tempered, glass is put in a furnace. It is manufactured by heating and quenching, the glass plate softens during heating, traces of fine irregularities are generated on the glass surface, and warpage occurs during rapid cooling. That is, the flatness of the glass plate is deteriorated, and there is a problem that the image quality is deteriorated such that when the reflected image reflected on the surface of the heat strengthened glass is seen, the image looks distorted.

  In particular, when such a fireproof double-glazed glass is used as a window or exterior wall of a building with the glass plate on the side that is not a heat-resistant fireproof glass plate on the outside, other buildings reflected on the outside glass plate And other landscape reflection images appear to be distorted.

  For fireproof glass, fire prevention laws and regulations are established for the purpose of preventing the spread of fire through fire extinguishing activities during the fire, as it takes time for the flame to break out of the window and to enter and penetrate. Article 109-2 of the Building Standards Law Enforcement Ordinance stipulates that when fire from a normal fire is applied to the fire prevention equipment, it will not emit a flame on surfaces other than the heating surface for 20 minutes after the start of heating. Has been.

  The present invention has been made in view of such circumstances, while maintaining the conventional moisture resistance, ease of manufacture, and design of the sealing portion, while blocking the flame in the event of a fire and improving the fire prevention performance, An object of the present invention is to provide a fireproof multilayer glass that satisfies the regulations and suppresses distortion of a reflected image viewed from a glass plate side that is not a heat-resistant fireproof glass plate.

In order to achieve the above object, the fire-proof multilayer glass of the present invention is such that at least two glass plates facing each other are separated by a spacer, and each side surface of the spacer facing the two glass plates is primary. A multi-layer glass in which a hollow layer is formed between two glass plates by being adhered to two glass plates by a sealing material, and the outer side of the primary sealing material is sealed by a secondary sealing material. in fire protection insulating glass which constitutes the glass sheets in heat fireproof glass plate, the glass plate other than the heat fireproof glass plate arranged on the non-heated surface side constituted by a low expansion composition glass that is not thermally tempered The linear expansion coefficient of the low expansion composition glass not thermally strengthened is at least 8 × 10 ⁻⁶ / ° C. or less .

  As a result, the glass plate on the non-heated surface side is difficult to break in the event of a fire, while maintaining the conventional moisture resistance, ease of manufacturing, and design of the sealed part. In addition to satisfying the relevant laws and regulations, the glass plate on the side that is not the heat and fire resistant glass plate is not heat-treated, so that the reflected image seen from the glass plate side that is not the heat and fire resistant glass plate is not distorted.

The low expansion composition glass that is not reinforced the heat, borosilicate glass, or aluminosilicate glass, or be any of the alkali content of such ponds Lee silicate glass preferred.

In this manner, the glass plate on the side that is not the heat-resistant fire-resistant glass plate is not subjected to heat strengthening treatment, low expansion composition glass having a linear expansion coefficient of a predetermined value or less, particularly borosilicate glass, aluminosilicate glass, or alkali content. with the arrangements with either pond Lee acid glass, reflected images when viewed from the glass plate side of the side not this heat fireproof glass plate, never appear distorted.

  Similarly, in order to achieve the above-mentioned object, the fireproof multilayer glass of the present invention comprises at least two glass plates opposed to each other with a spacer interposed therebetween, and a spacer glass opposed to the two glass plates. Each side is bonded to two glass plates with a primary sealing material to form a hollow layer between the two glass plates, and the outer side of the primary sealing material is a multilayer glass sealed with a secondary sealing material. Further, in the fireproof multilayer glass in which at least one glass plate is composed of a heat and fireproof glass plate, a glass plate other than the heat and fireproof glass plate is composed of chemically strengthened glass.

  As a result, the flame is cut off in the event of a fire to improve the fire prevention performance and meet the fire prevention related regulations, and the glass plate on the side that is not the heat and fire resistance glass plate is not heat-treated. The reflected image seen from the side is not distorted.

  As described above, according to the present invention, in the event of a fire, the glass plate on the non-heated surface side is difficult to break while maintaining the conventional moisture resistance, ease of manufacture, and design of the sealed portion. Since the glass plate on the side that is not heat and fire resistant glass plate is not heat treated, the reflected image seen from the glass plate side that is not heat and fire resistant glass plate is A beautiful reflected image can be projected without distortion.

The principal part expanded sectional view of the fire prevention multilayer glass which concerns on one Embodiment of this invention.

  Hereinafter, with reference to an accompanying drawing, the fireproof multilayer glass concerning the present invention is explained in detail.

  FIG. 1 is an enlarged cross-sectional view of a main part of a fireproof multilayer glass according to an embodiment of the present invention.

  The fire-proof multilayer glass 10 of the present embodiment shown in the cross-sectional view of FIG. 1 includes two glass plates 12 and 14 facing each other with a spacer 16 therebetween, and two glass plates 12 and 14 and The side surfaces 16A and 16B of the opposing spacer 16 are bonded to the two glass plates 12 and 14 by primary sealing materials 18A and 18B, respectively. Thereby, the hollow layer 20 is formed between the two glass plates 12 and 14. In addition, the outer sides of the primary sealing materials 18A and 18B (the side that is not the hollow layer 20, that is, the lower side of the primary sealing materials 18A and 18B and the spacer 16 in FIG. 1) are sealed by the secondary sealing material 22.

  In addition, although there exists a fire prevention multilayer glass provided with three or more glass plates, in embodiment, what provided the two glass plates 12 and 14 is demonstrated.

  As the spacer 16, a metal spacer mainly made of aluminum is often used, but a spacer made of stainless steel or hard resin may also be used. The spacer 16 has a hollow portion 24 therein, and the hollow portion 24 is filled with a desiccant 26 such as granular zeolite. The spacer 16 has a through hole 28 that allows the hollow portion 24 to communicate with the hollow layer 20, and the air in the hollow layer 20 is dried through the through hole 28.

  In the present embodiment, the glass plate 12 on one side of the fire-proof multilayer glass 10 thus configured is configured with a meshed glass plate which is a heat-resistant and fire-resistant glass plate, and on the other side, which is not the heat-resistant and fire-resistant glass. The glass plate 14 is made of a glass plate that is difficult to break against heat by a method other than heat strengthening. As the glass plate 12, other heat-resistant and fire-resistant glass plates such as heat-resistant tempered glass, low expansion tempered glass, and transparent crystallized glass may be used in addition to the meshed glass.

  By the way, as a cause which the glass plate 14 cracks at the time of a fire, the tensile stress which generate | occur | produces in the edge part of the glass plate 14 at the time of fire outbreak is mentioned. This tensile stress is caused by a temperature difference between the end portion of the glass plate 14 fitted in the sash frame and the surface portion exposed to the flame. When this tensile stress is applied, the stress concentrates on the cracks existing at the edge, and breakage occurs.

  Therefore, as one method for preventing the glass plate 14 from being broken by a fire, the thermal expansion coefficient of the glass plate 14 may be lowered. Therefore, a low expansion composition glass such as borosilicate glass that has not been heat-treated is used as the glass plate 14 that is difficult to break against heat.

Borosilicate glass (borosilicate glass) is a glass in which boric acid is mixed with silicon dioxide, which is the main component of glass, and is also called heat-resistant glass, hard glass, or borosilicate glass. B ₂ O ₃ is introduced as a network forming ion in the form of replacing SiO ₂ . Most of the glass excellent in chemical durability, electrical insulation, low expansion, thermal shock resistance and the like belongs to this borosilicate glass.

For example, “Pyran (registered trademark)” manufactured by Schott Nippon K.K. is heat-treated by heat-treating a borosilicate glass having a linear expansion coefficient of 3.3 × 10 ⁻⁶ / ° C. It is an enhanced low-expansion fireproof glass product. Thus, borosilicate glass has a very low coefficient of thermal expansion compared to that of ordinary float glass (about 9 × 10 ⁻⁶ / ° C.) and is resistant to thermal shock (rapid temperature difference). Used as a heat-resistant product.

In particular, the linear expansion coefficient α of the low expansion composition glass used as the glass plate 14 on the non-heat-resistant and fire-resistant glass side of the fireproof multilayer glass 10 is at least 8 × 10 ⁻⁶ / ° C. or less. In particular, it is preferable that 3.3 × 10 ⁻⁶ / ° C. ≦ α ≦ 8 × 10 ⁻⁶ / ° C. More preferably, 3.3 × 10 ⁻⁶ / ° C. ≦ α ≦ 6 × 10 ⁻⁶ / ° C.

When the linear expansion coefficient decreases, the melting temperature and softening point of the glass generally increase, which makes it difficult for mass production of glass plates. However, if the linear expansion coefficient is 3.3 × 10 ⁻⁶ / ° C. or more, Considering the melting temperature, high-temperature viscosity, and moldability of the glass, it can be produced by a so-called float process, so that mass production is possible and production costs can be reduced.

  Borosilicate glass is more transparent than ordinary soda lime glass, and since it is not heat-treated, the surface is smooth and the reflected image is not distorted.

  Next, a chemically strengthened glass can be used as a glass plate that is used as a glass plate 14 on the side of the fireproof double-glazed glass 10 that is not a heat-resistant fireproof glass and that is made stronger and hard to break by heat other than heat strengthening. .

  As a method of increasing the strength of glass, a method of forming a compressive stress layer on the glass surface is generally known, but as a method of forming a compressive stress layer on the glass surface, an air cooling strengthening method (physical strengthening method, Typical examples are a heat strengthening method and a chemical strengthening method (also called a chemical strengthening method or an ion exchange strengthening method).

  In the air cooling strengthening method, the glass plate surface heated to the vicinity of the softening point is rapidly cooled by air cooling or the like to form a compressive stress layer on the glass surface and strengthen the glass plate.

  In addition, the chemical strengthening method uses alkali metal ions (typically Li ions, Na ions) having a small ion radius on the glass plate surface by ion exchange at a temperature below the glass transition point, and alkali ions having a large ion radius (typically Is replaced with K ions) to form a compressive stress layer on the glass surface and strengthen the glass plate.

  As described above, the chemically strengthened glass is obtained by increasing the strength of the glass by changing the composition of the glass surface.

  Since chemically tempered glass is not heat-treated in the same way as borosilicate glass described above, there is little warping and distortion of the glass plate, and there is an effect that the reflected image can be seen clearly without distortion in the reflected image reflected on the surface. .

  Therefore, it is also preferable to use chemically tempered glass as the glass plate 14 on the side of the fireproof multilayer glass 10 that is not heat and fireproof glass.

  Thus, in the present embodiment, one of the two glass plates 12 and 14 that constitute the fire-proof multilayer glass 10 is a glass plate with a net that is a heat-resistant and fire-resistant glass plate, The other glass plate 14 that is not the heat-resistant and fire-resistant glass plate is made of low expansion composition glass such as borosilicate glass or chemically strengthened glass, so that the glass plate 14 that is not the heat-resistant and fire-resistant glass plate has high heat in the event of a fire. On the other hand, it is difficult to break.

  Here, the glass plate 14 which is not the heat-resistant and fire-proof glass plate is made of low expansion composition glass or chemically tempered glass, so that the glass plate 14 resists the tensile stress caused by the high temperature at the time of fire without breaking for a predetermined time. The fire-proof double-glazed glass 10 can meet the standards of fire-related laws and regulations (for example, Article 109-2 of the Building Standard Law Enforcement Ordinance).

  Moreover, since the low expansion composition glass and the chemically strengthened glass which were used for the glass plate 14 which is not a heat-resistant fireproof glass plate are neither heat-treated, The surface is smooth and the reflected image reflected on the surface is not distorted.

  Therefore, when this fireproof double-glazed glass 10 is used for a building window or the like with the glass plate 14 which is not a heat-resistant fireproof glass plate on the outside, reflection images of other buildings and other landscapes reflected on the surface thereof are obtained. Since it is not distorted, it does not give discomfort to pedestrians and the like on the road.

  As described above, the fireproof multilayer glass according to the present invention has been described in detail. However, the present invention is not limited to the above examples, and various improvements and modifications may be made without departing from the gist of the present invention. Of course.

  DESCRIPTION OF SYMBOLS 10 ... Fireproof double-glazed glass, 12 ... Glass plate (it is a heat-resistant fireproof glass plate), 14 ... (The glass plate which is not heat-strengthening-processed), 16 ... Spacer, 16A, 16B ... Each side surface of a spacer, 18A, 18B ... primary sealing material, 20 ... hollow layer, 22 ... secondary sealing material, 24 ... hollow part, 26 ... desiccant, 28 ... through hole

Claims (2)

At least two glass plates facing each other are separated by a spacer, and each side surface of the spacer facing the two glass plates is bonded to the two glass plates by a primary sealing material, respectively. A fireproof double glazing glass in which a hollow layer is formed between plates and the outside of the primary sealant is sealed with a secondary sealant, and at least one glass plate is composed of a heat and fireproof glass plate. In
Consists of a low expansion composition glass that is not thermally strengthened glass plate other than the heat and fireproof glass plate disposed on the non-heated surface side ,
The low-expansion composition glass that has not been heat strengthened has a coefficient of linear expansion of at least 8 × 10 ⁻⁶ / ° C. or less . 2. The fireproof multilayer glass according to claim 1, wherein the low expansion composition glass that is not thermally strengthened is any one of borosilicate glass, aluminosilicate glass, and silicate glass having no alkali content.

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