Insulating glass

Abstract

To provide a double-glazing in which breakage of a glass plate can be suppressed.SOLUTION: A double-glazing 1 comprises a plurality of glass plates 11 and 12 arranged facing each other with a gap therebetween, and a sealing portion 2 sealing between the peripheries of the plurality of glass plates 11 and 12, a hollow layer s1 is formed by the plurality of glass plates 11 and 12 and the sealing portion 2, wherein the sealing portion 2 has a sealing material 31 provided between the peripheries of the plurality of glass plates 11 and 12, and a seal material 33 closing a through-hole 32 formed in the sealing material 31 in such a manner that the hollow layer s1 and the outside are communicated with each other via the through-hole 32, and the hollow layer s1 and the outside are communicated with each other by heating the seal material 33.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to insulating glazing. [Background technology]

[0002] Conventionally, double glazing has a configuration in which two glass plates are arranged with a gap between them, and the gap between the glass plates is sealed with a sealing material such as rubber (see Patent Document 1 below). In fire-resistant double glazing, one of the two glass plates is a fire-resistant glass plate to prevent the glass plate from cracking due to heat in the event of a fire. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2019 / 093319 Summary of the Invention [Problem to be solved by the invention]

[0004] In the event of a fire, even with fire-resistant double-pane glass, if the gas in the sealed space formed by the glass panes and the sealing material expands due to heat, the pressure of the gas in the sealed space increases, and there is a risk that the glass panes may break. If the glass pane breaks, the sealing material will come into contact with oxygen in the air, which may ignite the sealing material and cause the fire to spread.

[0005] The present disclosure has been made in consideration of the above circumstances, and provides insulating glass capable of suppressing breakage of glass sheets. [Means for solving the problem]

[0006] A double-glazing glass according to one aspect of the present disclosure includes a plurality of glass plates arranged opposite to each other with a gap therebetween, and a sealing portion that seals between peripheral portions of the plurality of glass plates, wherein a hollow layer is formed by the plurality of glass plates and the sealing portion, and the sealing portion includes a sealing material provided between the peripheral portions of the plurality of glass plates, and a sealant that closes a through hole formed in the sealing material so as to communicate the hollow layer with the outside, and the sealant closes a through hole formed in the sealing material so as to communicate the hollow layer with the outside by heating. A tubular member is inserted into the through hole, and the outer end of the tubular member is sealed with the sealing material. . [Brief description of the drawings]

[0007] [Figure 1] 1 is a cross-sectional view taken along the thickness direction of an insulating glass according to a first embodiment. [Diagram 2] FIG. 2 is a cross-sectional view taken along the thickness direction of the insulating glass according to the first embodiment, showing a state in which the glass is heated. [Diagram 3] FIG. 2 is a cross-sectional view taken along the thickness direction of the insulating glass according to the first embodiment, showing a state in which the glass is heated. [Figure 4] FIG. 5 is a perspective view of insulating glass according to a second embodiment. [Diagram 5] Cross-sectional view taken along line AA in Figure 4. [Figure 6] Cross-sectional view of line BB in Figure 5. [Figure 7] FIG. 13 is a diagram showing the displacement in the thickness direction of the glass at the center position of the glass plate of the comparative example. [Figure 8] FIG. 4 is a diagram showing the displacement in the thickness direction of the glass at the center position of the glass plate in the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] First embodiment Hereinafter, the double glazing according to the first embodiment will be described with reference to the drawings. The double glazing (double glazing) 1 according to this embodiment shown in Fig. 1 is fire-resistant. The double glazing 1 includes a glass sheet (glass plate) 11, a fire-resistant glass (glass plate) 12, and a sealing portion 2.

[0009] The glass plate 11 is an ordinary glass plate having no fire resistance. The fire-resistant glass plate 12 is a glass plate having fire resistance.

[0010] The glass sheet 11 and the fire-resistant glass 12 are formed in a plate shape. The glass sheet 11 and the fire-resistant glass 12 are arranged facing each other with a gap therebetween. The plate surfaces of the glass sheet 11 and the fire-resistant glass 12 face in directions facing each other. The glass sheet 11 and the fire-resistant glass 12 are formed in a substantially rectangular shape when viewed from the front (when viewed from a direction perpendicular to the plate surfaces of the glass sheet 11 and the fire-resistant glass 12), but the shape can be set appropriately.

[0011] In this embodiment, one of the two glass plates is made of fireproof glass, but wired glass may be used instead of the fireproof glass. The glass plate 11 may be made of fireproof glass or wired glass.

[0012] The sealing portion 2 has a first sealing portion 20 and a second sealing portion 30. In the paired glass 1 formed in a generally rectangular shape when viewed from the front, at peripheral portions 1a on three of the four peripheral sides, the peripheral portion 11a of the glass sheet 11 and the peripheral portion 12a of the fire-resistant glass 12 are sealed with the first sealing portion 20. At peripheral portion 1c on the remaining one of the four peripheral sides, the peripheral portion 11c of the glass sheet 11 and the peripheral portion 12c of the fire-resistant glass 12 are sealed with the second sealing portion 30.

[0013] In this embodiment, a first sealing portion 20 is provided at the lower end of the pair of glass 1, spanning approximately the entire width of the pair of glass 1. First sealing portions 20 are provided at both width end portions of the pair of glass 1, spanning approximately the entire length of the pair of glass 1 in the up-down direction. A second sealing portion 30 is provided at the upper end of the pair of glass 1, spanning approximately the entire width of the pair of glass 1.

[0014] A hollow layer s1 is formed between the glass sheet 11 and the fireproof glass 12 by the glass sheet 11, the fireproof glass 12, the first sealing portion 20, and the second sealing portion 30. The hollow layer s1 is filled with gas. Under normal conditions, the gas in the hollow layer s1 is sealed by the first sealing portion 20 and the second sealing portion 30.

[0015] The first sealing portion 20 has a first sealing material 21. The first sealing material 21 is provided so as to seal between a surface 11b of the peripheral portion 11a of the glass sheet 11 facing the peripheral portion 12a of the fire-resistant glass 12 and a surface 12b of the peripheral portion 12a of the fire-resistant glass 12 facing the peripheral portion 11a of the glass sheet 11.

[0016] The second sealing portion 30 has a second sealing material (sealing material) 31 and a sealant 33. The second sealing material 31 is provided so as to seal between a surface 11d of the peripheral portion 11c of the glass sheet 11 facing the peripheral portion 12c of the fire-resistant glass 12 and a surface 12d of the peripheral portion 12c of the fire-resistant glass 12 facing the peripheral portion 11c of the glass sheet 11.

[0017] In this embodiment, the second sealing portion 30 is provided at the upper end of the pair of glass 1, but the second sealing portion 30 may be provided at the lower end or an end in the width direction of the pair of glass 1. The first sealing material 21 and the second sealing material 31 are made of, for example, a rubber-based material.

[0018] A through hole 32 is formed in the second sealing material 31 so as to connect the hollow layer s1 to the outside. In this embodiment, the through hole 32 is formed so as to penetrate the second sealing material 31 in the up-down direction.

[0019] A seal material 33 is provided in the through hole 32. In a normal state, the seal material 33 closes the through hole 32.

[0020] The sealant 33 is made of either a rubber material or an elastomer material that generates voids by a chemical reaction caused by heating, for example. Specifically, the sealant 33 is made of a material such as butyl rubber, silicone, modified silicone, polyurethane, polysulfide, acrylic resin, or polyisobutylene.

[0021] The sealant 33 may be made of a material having a melting point of, for example, more than 70° C. and less than 116° C. Specifically, the sealant 33 is made of a material such as polyethylene, ethylene-ethyl acrylate plastic, cycloolefin copolymer, ethylene-vinyl acetate, polypropylene, ethylene-acrylic acid plastic, ethylene-methacrylic acid plastic, ethylene-butyl acrylate plastic, thermoplastic polyurethane elastomer, acrylonitrile-butadiene-styrene plastic, polybutene, polyvinylidene fluoride, thermoplastic polyolefin, ethylene / octene, ethylene propylene diene monomer, polyamide 6 / 66 / 610, polyurethane, polyamide, poly-α-olefin, polyamide 6, polybutylene terephthalate, polystyrene, or the like.

[0022] When the sealing material 33 is made of either a rubber material or an elastomer material that creates gaps in the through hole 32 when heated, as shown in Figure 2, when the pair of glass 1 is heated, a chemical reaction occurs in the sealing material 33 upon heating, causing multiple gaps 36a to be connected in the vertical direction, forming a communication passage 36 that connects the hollow layer s1 to the outside.

[0023] When the sealant 33 is made of a material having a melting point of more than 70°C and less than 116°C, as shown in FIG. 3, the sealant 33 melts before the second sealing material 31 when the pair of glass panes 1 are heated and the temperature is less than 116°C. When the sealant 33 melts, a part of the through hole 32 becomes a communication passage 36 that connects the hollow layer s1 to the outside. According to the experimental results described later, when the pair of glass panes are heated and the sealing material is heated to 116°C or more, the glass is generally more likely to break. Since the sealant 33 melts and forms the communication passage 36 at temperatures less than 116°C, the communication passage 36 is formed before the glass panes 11 and the fireproof glass 12 are broken. Under normal conditions, it is necessary that the window functions (wind pressure resistance, watertightness, airtightness, heat insulation, sound insulation, impact, opening and closing force, visibility, etc.) are not lost, and the window can be used without problems at temperatures less than 70°C, which is the normal temperature range.

[0024] In the double glazing 1 configured in this manner, under normal conditions, the gas inside the hollow layer s1 is sealed by the sealing part 2. In the event of a fire, as the temperature of the double glazing 1 rises, a communication passage 36 that connects the hollow layer s1 to the outside is formed due to a change in state of the sealant 33, a chemical reaction, etc., and the fluid inside the hollow layer s1 escapes to the outside, making it possible to suppress damage to the glass sheets 11 and the fireproof glass 12 due to an increase in pressure.

[0025] In the case where the sealant 33 of the double glazing 1 is made of either a rubber material or an elastomer material that generates voids when heated, when the double glazing 1 is heated, a chemical reaction of the sealant 33 forms a communication passage 36 in the sealant 33 that connects the hollow layer s1 to the outside. The fluid inside the hollow layer s1 passes through the communication passage 36 to escape to the outside, making it possible to suppress damage to the glass sheets 11 and the fireproof glass 12 due to an increase in pressure.

[0026] In the case where the sealant 33 of the double glass 1 is made of a material having a melting point of more than 70° C. and less than 116° C., when the double glass 1 is heated and the sealant 33 melts at a temperature below 116° C., a communication passage 36 that connects the hollow layer s1 to the outside is formed. The fluid inside the hollow layer s1 passes through the communication passage 36 to escape to the outside, and damage to the glass sheets 11 and the fireproof glass 12 due to a pressure increase can be suppressed.

[0027] Second Embodiment Next, a double glazing according to a second embodiment will be described mainly with reference to Fig. 4 to Fig. 6. In the description of the embodiment shown below, the same members as those described above are given the same reference numerals and the description thereof will be omitted.

[0028] As shown in FIG. 5, the second sealing portion 30A of the paired glass 1A according to this embodiment includes a second sealing material (sealing material) 31A, a tube (tubular member) 4, and a seal material 33A. The second sealing portion 30A will be described as being provided at the upper end of the paired glass 1. The second sealing material 31A is provided to seal between the surface 11d of the peripheral portion 11c of the glass sheet 11 and the surface 12d of the peripheral portion 12c of the fireproof glass 12. The second sealing material 31A has a through hole 32A formed to communicate the hollow layer s1 with the outside. As shown in FIG. 6, in this embodiment, the through hole 32A is formed near the end of the paired glass 1A in the width direction.

[0029] 5, a spacer 35 is provided adjacent to the second sealing material 31A on the lower side between the glass sheet 11 and the fire-resistant glass 12. The spacer 35 is provided over substantially the entire length in the width direction of the pair of glass 1. The spacer 35 maintains the dimension of the hollow layer s1 between the glass sheet 11 and the fire-resistant glass 12.

[0030] The spacer 35 is formed in a ring shape having a generally rectangular cross section. A first through hole 35b is formed in the first wall portion 35a at the top of the spacer 35, penetrating in the vertical direction. The first through hole 35b is connected to the through hole 32A. A second through hole 35d is formed in the second wall portion 35c at the bottom of the spacer 35, penetrating in the vertical direction. The second through hole 35d may be formed at one location in the center of the thickness direction of the pair of glass 1, or may be formed at multiple locations in the thickness direction of the pair of glass 1. The second through hole 35d may be a hole for communicating between a desiccant (not shown) disposed inside the spacer 35 and the gas inside the hollow layer s1.

[0031] The tube 4 is inserted through the first through hole 35b and the through hole 32A. As shown in Fig. 6, the tube 4 is formed in a substantially L-shape. The tube 4 has a first straight portion 41 and a second straight portion 42.

[0032] The first straight portion 41 extends in the up-down direction. A lower end 41a of the first straight portion 41 is disposed between the first wall portion 35a and the second wall portion 35c of the spacer 35. When the paired glass 1A is viewed from the side of the glass sheets 11 and the fireproof glass 12, the tubes 4 are hidden by the spacer 35, so that exposure of the tubes 4 can be suppressed. When the spacer 35 is not provided, exposure of the tubes 4 can be suppressed by making the lower end portion 41a of the tubes 4 flush with the lower surface of the second sealing material 31A.

[0033] The second straight portion 42 is bent from the upper end of the first straight portion 41 toward the center in the width direction of the pair of glass 1A. The second straight portion 42 is disposed along the upper surface 31u of the second sealing material 31A. In this manner, the tube 4 is provided so as to communicate between the hollow layer s1 and the outside.

[0034] An end 42a of the second straight portion 42 is sealed with a seal material 33A. Under normal conditions, the end 42a of the tube 4 is closed by the seal material 33A. The end 42a side of the second straight portion 42 of the tube 4 and the seal material 33A are covered with a protective member 37 such as tape and fixed to an upper surface 31u of the second sealing material 31A.

[0035] When the pair of glass panes 1A is heated, holes (communication paths) 36A (see the two-dot chain line in FIG. 4) open in the sealant 33A due to a change in state or a chemical reaction in the sealant 33A, and the protective member 37 peels off or melts. As a result, the hollow layer s1 is connected to the outside.

[0036] (Examples and Comparative Examples) A control experiment was carried out for the above-mentioned paired glass 1A (Example) and a conventional paired glass (Comparative Example) using a small heating furnace to reproduce a fire environment (heating conditions: ISO834 standard heating curve). In the paired glass 1A of the Example, a butyl seal was used for the sealant 33A. In the Comparative Example, a conventional glass specification (heat-resistant reinforced-Low-E paired glass) was used.

[0037] As shown in Fig. 6, the experimental results showed that in the comparative example, glass breakage occurred in 5 minutes and 46 seconds, whereas in the paired glass 1A of the example, no glass cracking occurred even after heating for 20 minutes.

[0038] In the Example and Comparative Example, the amount of deformation of the glass (thickness direction of the pair of glass panes) was measured using a digital image correlation method during the control experiment. In the Comparative Example, the pair of glass panes gradually expanded from the start of the test, causing the displacement in the thickness direction of the pair of glass panes to increase, which ultimately led to the glass being broken. In the Example, as shown in FIG. 8, it can be seen that the amount of deformation of the glass in the thickness direction decreased rapidly during heating. This indicates that the heat caused holes to open in the sealing material 33A provided in the Example, and the high-pressure gas in the pair of glass panes 1A escaped to the outside through the holes in the sealing material 33A, thereby reducing the deformation of the glass.

[0039] In the double glazing 1 configured in this manner, under normal conditions, the gas inside the hollow layer s1 is sealed by the sealing portion 2. In the event of a fire, as the temperature of the double glazing 1 rises, a hole 36A opens in the sealant 33A sealing the end 42a of the tube 4 due to a change in state or a chemical reaction in the sealant 33A. The hollow layer s1 and the outside are connected by the tube 4 and the hole 36A in the sealant 33A, and the fluid inside the hollow layer s1 escapes to the outside through the tube 4 and the hole 36A in the sealant 33A, making it possible to suppress damage to the glass panes due to an increase in pressure.

[0040] The shapes and combinations of the components shown in the above-described embodiment are merely examples, and various modifications can be made based on design requirements, etc., without departing from the spirit of the present disclosure.

[0041] In the embodiment, a double glazing is used as an example, but any double glazing having two or more glass sheets may be used. For example, in the case of a triple glazing, a sealing part having a sealing material and a sealing material may be provided between each glass sheet. [Explanation of symbols]

[0042] Reference Signs List 1, 1A...pair glass (insulating glass), 2...sealing portion, 4...tube (tubular member), 11...plate glass (glass plate), 11a, 11c...periphery, 12...fireproof glass (glass plate), 12a, 12c...periphery, 31, 31A...second sealing material (sealing material), 32, 32A...through hole, 33, 33A...sealing material, 36, 36A...connecting passage, 42a...end, s1...hollow layer

Claims

1. A plurality of glass plates arranged opposite each other with a gap therebetween; a sealing portion that seals between the peripheral portions of the plurality of glass plates, a hollow layer is formed by the plurality of glass plates and the sealing portion, The sealing portion is a sealing material provided between peripheral portions of the glass plates; a seal material for closing a through hole formed in the sealing material so as to communicate the hollow layer with the outside, When the sealing material is heated, the hollow layer communicates with the outside, A tubular member is inserted through the through hole, The outer end of the tubular member is sealed with the sealing material.

2. The insulating glass according to claim 1 , wherein the sealing material is made of either a rubber material or an elastomer material that generates voids by a chemical reaction caused by heating.

3. 3. The insulating glass according to claim 1, wherein the melting point of the material constituting the sealing material is greater than 70°C and less than 116°C.

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