JPWO2014168219A1 - Fireproof double glazing - Google Patents

Abstract

Provided is a fireproof double-glazed glass that is excellent in visibility and design, while suppressing increase in total thickness and weight while improving heat insulation. In the fire-proof multi-layer glass 110 configured by separating the first glass plate 112 and the second glass plate 114 through the spacer 118 and sealing the periphery, the first glass plate 112 and the second glass. A third glass plate 116 made of chemically strengthened glass is disposed between the plate 114 and held by a holding unit 120 provided in the spacer 118. Thereby, while improving heat insulation, it can suppress that total thickness and a weight become large, and can provide the fire prevention multilayer glass excellent also in visibility and design property.

Description

  The present invention relates to fireproof double glazing.

  A general multilayer glass is constituted by separating two glass plates with a spacer and sealing the peripheral edge with a sealing material.

  In such a multilayer glass composed of two glass plates, if the hollow layer (that is, the layer between the glass plates) is thin, the U value (JIS R3107 1998) increases (that is, When the hollow layer becomes thicker, the U value becomes lower (that is, the heat insulating property becomes higher). However, if the hollow layer is too thick, the gas in the hollow layer causes convection and becomes easy to transfer heat, which may increase the U value (that is, lower the heat insulating property).

  Thus, there is known a double-glazed glass in which two or more hollow layers are provided by using three or more glass plates to further improve the heat insulation performance (see Patent Documents 1 and 2, etc.).

  By the way, fire-proof and semi-fire-proof buildings (such as various buildings), which are positioned as buildings with high fire resistance, are obliged to install fire prevention equipment (fire doors, etc.) with flame-shielding performance in areas where there is a risk of spreading the outer wall opening. It has been. In addition, from the viewpoint of urban fire prevention, in fire prevention and semi-fire prevention areas, buildings other than fire-resistant and semi-fire-resistant buildings (such as detached houses) are also equipped with fire prevention equipment with semi-flame-proofing performance at the part where the outer wall opening may spread. Installation is mandatory. Therefore, when using double glazing for the outer wall opening of such a building, it is necessary to use double glazing (fire proof double glazing) having a certain fire prevention performance.

  Conventional fireproof double-glazed glass has ensured fireproof performance by using netted glass, heat-resistant tempered glass, or the like for the glass plate constituting the double-glazed glass (see, for example, Patent Document 3).

JP 2010-6684 A JP-A-9-263428 JP-A-8-67536

  However, heat-resistant tempered glass and meshed glass are more expensive than ordinary glass, and meshed glass has low transparency due to the mesh.

  In addition, when a double-layer glass is constituted by three glass plates having a normal thickness, the total thickness and weight increase, and the corresponding sash is restricted. Moreover, since two spacers are required as in Patent Documents 1 and 2, the number of members increases, and the designability (appearance) decreases.

  The present invention has been made in view of such circumstances, and provides a relatively inexpensive fire-proof multi-layer glass that improves heat insulation while suppressing an increase in total thickness and weight and is excellent in visibility. The purpose is to do.

  A mode for solving the above problem will be described.

  A 1st aspect is a double-glazed glass comprised by separating a 1st glass plate and a 2nd glass plate, and sealing the periphery with a sealing material, Comprising: 1st glass plate and 2nd glass A thin third glass plate made of low expansion glass or chemically tempered glass is provided between the glass plate and the third glass plate between the first glass plate and the second glass plate. A fireproof double-glazed glass comprising the first hollow layer and the second hollow layer.

  According to this aspect, the multi-layer glass is composed of the three glass plates including the thin third glass plate composed of the low expansion glass or the chemically strengthened glass. Thereby, while improving heat insulation, it can suppress that total thickness and a weight become large, and can provide the multilayer glass provided with fixed fireproof performance. Moreover, since the low expansion glass or chemically strengthened glass with good transparency is used for the third glass plate for ensuring the fireproof performance, visibility can be ensured.

  In the second aspect, the third glass plate is made of chemically strengthened glass, and is spaced from the first glass plate via the first spacer, and the second glass plate and the second spacer are separated from each other. It is the aspect spaced apart through.

  According to this aspect, the third glass plate is made of chemically strengthened glass, spaced apart from the first glass plate via the first spacer, and second with respect to the second glass plate. It spaced apart through the spacer. By configuring the third glass plate with a chemically strengthened glass having a thin plate thickness, it is possible to reduce the thickness while securing a certain fire prevention performance.

  A 3rd aspect is provided with the spacer arrange | positioned between a 1st glass plate and a 2nd glass plate, and the holding part which is provided in the spacer and hold | maintains a 3rd glass plate, 3rd In this embodiment, the glass plate is made of chemically strengthened glass.

  According to this aspect, the first glass plate and the second glass plate are separated by the spacer, and the third glass plate is held by the holding portion provided in the spacer. Thereby, since multi-layer glass can be hold | maintained with one spacer, a number of members can be reduced and the designability improves. Productivity is also improved. Furthermore, compared with fire-proof double-glazed glass that uses two spacers, the number of places where the sealing material (primary sealing material) that adheres the spacers to the glass plate can be reduced from four to two. It is possible to reduce the amount of sealing material that can be a source, and to improve fire prevention, there is a possibility that water vapor permeates through the hollow layer or gas confined in the hollow layer leaks out of the hollow layer. Since a certain path can be reduced, durability is also improved.

  In addition, in the range allowed by design, in addition to the holding portion for holding the third glass plate, the spacers separating the first glass plate and the second glass plate, the fourth, fifth, A holding portion for holding the glass plate may be provided.

  A 4th aspect is an aspect by which a holding | maintenance part is comprised as a to-be-adhered part to which the periphery of a 3rd glass plate adhere | attaches via an adhesive agent.

  According to this aspect, the third glass plate is bonded to the spacer by adhesion. Thereby, a 3rd glass plate is reliably hold | maintained at a spacer. Of course, if the third glass plate is securely held by the spacer, the third glass plate is held by the general sealing material construction method, glazing gasket construction method, structural gasket construction method, etc. It may be fitted in.

  A 5th aspect is an aspect by which a holding | maintenance part is comprised as a crimping part which fastens the periphery of a 3rd glass plate.

  According to this aspect, the third glass plate is crimped to the spacer and joined. Thereby, a 3rd glass plate is reliably hold | maintained at a spacer.

  A 6th aspect is an aspect by which a holding | maintenance part is comprised as a to-be-fastened part by which the periphery of a 3rd glass plate is fastened via a fastening member. Thereby, a 3rd glass plate is reliably hold | maintained at a spacer.

  According to a seventh aspect, the apparatus further comprises: a support member disposed above the spacer; and a suspension member that is provided in the spacer, engages with the support member, and suspends and supports the spacer. It is preferable.

  In the aspect of the present invention, the spacer includes the suspension member. Even if the first or second glass plate is damaged, dropped, or softens due to a flame at the time of a fire, and a heat sink occurs and the third glass plate tries to fall off the joinery, the third glass plate has a spacer and a suspension member. Therefore, the third glass plate can be prevented from falling.

  ADVANTAGE OF THE INVENTION According to this invention, it can suppress that total thickness and weight become large, improving a heat insulation, and can provide the fire prevention multilayer glass excellent in visibility.

Sectional drawing which shows 1st Embodiment of the fire prevention multilayer glass which concerns on this invention Sectional drawing which shows 2nd Embodiment of the fire prevention multilayer glass which concerns on this invention Cross-sectional view of the relevant part showing an example of fixing the third glass plate by component joining Sectional drawing which shows 3rd Embodiment of the fire prevention multilayer glass which concerns on this invention Sectional drawing which shows the modification of the fire prevention multilayer glass of 3rd Embodiment Sectional drawing which shows other embodiment which has a function equivalent to a suspension member The perspective view which shows other embodiment of a holding | maintenance part and a suspension member Sectional drawing which shows other embodiment which fixes a 3rd glass plate

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<< First Embodiment >>
FIG. 1 is a cross-sectional view showing a first embodiment of a fireproof multilayer glass according to the present invention.

  The fireproof multilayer glass 10 shown in FIG. 1 is a multilayer glass having a configuration in which a third glass plate 16 is disposed between a first glass plate 12 and a second glass plate 14.

The 1st glass plate 12 and the 2nd glass plate 14 are normal float glass. On the other hand, the third glass plate 16 is low expansion glass (for example, borosilicate glass, aluminosilicate glass, silicate glass with little or no alkali content) or chemically tempered glass. Compared with the glass plate 14 of 2, the thickness is sufficiently thin. For example, the thickness of the third glass plate 16 is preferably 1.0 to 6.0 mm.
The first glass plate 12 and the second glass plate 14 are 2.5 to 19.0 mm in thickness when they are ordinary float glass plates. The first glass plate 12 and the second glass plate 14, which are mainly set by the magnitude and dimensions of the external force, are preferably made as thin as possible in order to reduce the weight.

  In this manner, by configuring the third glass plate 16 disposed in the middle with low expansion glass or chemically tempered glass, it is possible to ensure a certain fireproof performance while improving heat insulation. In particular, if the third glass plate 16 is made of chemically strengthened glass, the fireproof double-glazed glass 10 can be thinned, and the total thickness and weight can be reduced. Moreover, in the fireproof multilayer glass 10, since a meshed glass is not used, favorable visibility can be ensured.

Chemically tempered glass refers to glass whose strength has been improved by a chemical tempering method. The chemical strengthening method refers to ion exchange of alkali metal ions (for example, Na ions) on the glass surface layer with alkali ions (for example, K ions) having a larger ion radius at a temperature lower than the glass transition point. It is a method of strengthening glass by forming compressive stress. According to the chemical strengthening method, a thin glass plate can be strengthened satisfactorily.
The chemically strengthened glass plate used as the third glass plate has first and second main surfaces, and a surface compressive stress is formed on both of the main surfaces by the chemical strengthening treatment, and a tensile stress is formed inside. The glass plate has a plate thickness of 1.0 to 2.5 mm, a surface compressive stress value of 400 to 1000 MPa, a tensile stress value of 1 to 25 MPa, and the main surface. Those having a thickness in the plate thickness direction of the compressive stress layer in both of the thicknesses of 7 to 30 μm can be preferably used.
The low expansion glass plate used as the third glass plate has a plate thickness of 1.0 to 6.0 mm and a thermal expansion coefficient of 3.3 to 8.0 × 10 ⁻⁶ / ° C. Those subjected to tempering treatment as required can be preferably used.

Here, chemically strengthened glass, a SiO ₂ 56 to 75% by mole percentage based on oxides, _{Al 2 O 3 1~20%, 8~22} % of Na ₂ O, 0 to _{K 2} O %, MgO 0-14%, ZrO ₂ 0-5% and CaO 0-10%. Hereinafter, unless otherwise specified, the percentage display indicates the molar percentage display content.
The reason for limiting the glass composition to the above range in the chemically strengthened glass of the present embodiment will be described below.

SiO ₂ is known as a component that forms a network structure in the glass microstructure, and is a main component constituting the glass. The content of SiO ₂ is 56% or more, preferably 60% or more, more preferably 63% or more, and further preferably 65% or more. Further, the content of SiO ₂ is 75% or less, preferably 73% or less, more preferably 71% or less. When the content of SiO ₂ is 56% or more, it is advantageous in terms of stability and weather resistance as glass. On the other hand, when the content of SiO ₂ is 75% or less, it is advantageous in terms of meltability and moldability.

Al ₂ O ₃ has an effect of improving ion exchange performance in chemical strengthening, and particularly has a large effect of improving surface compressive stress (CS). It is also known as a component that improves the weather resistance of glass. Moreover, there exists an effect | action which suppresses the penetration | invasion of the tin from a bottom surface at the time of float forming. The content of Al ₂ O ₃ is 1% or more, preferably 3% or more, more preferably 5% or more. The content of Al ₂ O ₃ is 20% or less, preferably 17% or less, more preferably 12% or less, still more preferably 10% or less, and particularly preferably 7% or less. When the content of Al ₂ O ₃ is 1% or more, desired CS is obtained by ion exchange, and an effect of suppressing infiltration of tin is obtained. On the other hand, if the content of Al ₂ O ₃ is 20% or less, the devitrification temperature does not increase greatly even when the viscosity of the glass is high, which is advantageous in terms of melting and forming in the soda lime glass production line. .

The total content of SiO ₂ and Al ₂ O ₃ SiO ₂ + Al ₂ O ₃ is preferably 80% or less. If it exceeds 80%, the viscosity of the glass at a high temperature may increase and melting may be difficult, more preferably 79% or less, and still more preferably 78% or less. _Further, SiO 2 + _Al 2 _{O 3} is preferably 70% or more. If it is less than 70%, the crack resistance when an indentation is made decreases, more preferably 72% or more.

Na ₂ O is an essential component for forming a surface compressive stress layer by ion exchange, and has an effect of increasing the depth of compressive stress (DOL). Moreover, it is a component which lowers the high temperature viscosity and devitrification temperature of glass, and improves the meltability and moldability of glass. The content of Na ₂ O is 8% or more, preferably 12% or more, more preferably 13% or more. Further, the content of Na ₂ O is 22% or less, preferably 20% or less, more preferably 16% or less. When the content of Na ₂ O is 8% or more, a desired surface compressive stress layer can be formed by ion exchange. On the other hand, when the content of Na ₂ O is 22% or less, sufficient weather resistance can be obtained.

K ₂ O is not essential, but may be contained because it has an effect of increasing the ion exchange rate and deepening the DOL. On the other hand, if the amount of K ₂ O is excessive, sufficient CS cannot be obtained. Preferably 10% or less when they contain K 2 _O, more preferably 8% or less, more preferably not more than 6%. When the content of K ₂ O is 10% or less, sufficient CS can be obtained.
MgO is not essential, but is a component that stabilizes the glass. The content of MgO is preferably 2% or more, more preferably 3% or more, and still more preferably 3.6% or more. Further, the content of MgO is 14% or less, preferably 8% or less, more preferably 6% or less. When the content of MgO is 2% or more, the chemical resistance of the glass becomes good. The meltability at high temperature becomes good and devitrification hardly occurs. On the other hand, when the content of MgO is 14% or less, the difficulty of devitrification is maintained, and a sufficient ion exchange rate is obtained.

ZrO ₂ is not essential, but it is generally known that ZrO ₂ has an effect of increasing the surface compressive stress in chemical strengthening. However, even if a small amount of ZrO ₂ is contained, the effect is not great for the cost increase. Therefore, an arbitrary proportion of ZrO ₂ can be contained as long as the cost permits. When it contains, it is preferable that it is 5% or less.
CaO is not essential, but is a component that stabilizes the glass. Since CaO tends to inhibit the exchange of alkali ions, it is preferable that the content is reduced or not contained particularly when it is desired to increase the DOL. On the other hand, in order to improve chemical resistance, 2% or more is preferable, more preferably 4% or more, and still more preferably 6% or more. The amount in the case of containing CaO is 10% or less, preferably 9% or less, more preferably 8.2% or less. When the content of CaO is 10% or less, a sufficient ion exchange rate is maintained, and a desired DOL is obtained.

SrO is not essential, but may be contained for the purpose of lowering the high temperature viscosity of the glass and lowering the devitrification temperature. Since SrO has the effect of lowering the ion exchange efficiency, it is preferable not to contain it especially when it is desired to increase the DOL. When contained, the amount of SrO is preferably 3% or less, more preferably 2% or less, and still more preferably 1% or less.
BaO is not essential, but may be contained for the purpose of lowering the high temperature viscosity of the glass and lowering the devitrification temperature. Since BaO has the effect of increasing the specific gravity of the glass, it is preferably not contained when the weight is intended to be reduced. The BaO content when contained is preferably 3% or less, more preferably 2% or less, and still more preferably 1% or less.
TiO ₂ is abundant in natural raw materials and is known to be a yellow coloring source. The content of TiO ₂ is preferably 0.3% or less, more preferably 0.2% or less, and still more preferably 0.1% or less. If the content of TiO ₂ exceeds 0.3%, the glass becomes yellowish.

In addition, chloride, fluoride, and the like may be appropriately contained as a glass melting fining agent. The glass of the present invention consists essentially of the components described above, but may contain other components as long as the object of the present invention is not impaired. When such components are contained, the total content of these components is preferably 5% or less, more preferably 3% or less, and typically 1% or less. Hereinafter, the other components will be described as an example.
ZnO may be contained, for example, up to 2% in order to improve the meltability of the glass at a high temperature. However, when it is produced by the float process, it is preferably not contained because it is reduced by a float bath and becomes a product defect.

B ₂ O ₃ may be contained in a range of less than 1% in order to improve the meltability at high temperature or the glass strength. In general, when an alkali component of Na ₂ O or K ₂ O and B ₂ O ₃ are contained at the same time, volatilization becomes intense and the brick is remarkably eroded. Therefore, it is preferable that B ₂ O ₃ is not substantially contained.
Li ₂ O is a component that lowers the strain point and facilitates stress relaxation, and as a result makes it impossible to obtain a stable surface compressive stress layer. The amount is preferably less than 1%, more preferably 0.05% or less, particularly preferably less than 0.01%.

  The first glass plate 12 and the third glass plate 16 are spaced from each other with a first spacer 18 interposed therebetween. The second glass plate 14 and the third glass plate 16 are spaced from each other with the second spacer 20 interposed therebetween.

  The first spacer 18 has a substantially rectangular tube shape having a hollow portion, and is arranged in a frame shape along the peripheral edges of the first glass plate 12 and the third glass plate 16. The first glass plate 12 and the third glass plate 16 are spaced apart from each other with a certain distance by the first spacer 18. Thereby, the first hollow layer 22 is formed between the first glass plate 12 and the third glass plate 16.

  As for the 1st spacer 18, the surface which opposes the 1st glass plate 12 is closely_contact | adhered (or adhere | attached) to the 1st glass plate 12 by the primary sealing material 24A. Further, the surface facing the third glass plate 16 is closely attached (or adhered) to the third glass plate 16 by the primary sealing material 24B.

  Further, a secondary sealant 26 is filled and bonded to the outside of the first spacer 18 (on the side opposite to the first hollow layer 22). The secondary sealing material 26 fills a concave space formed between the first glass plate 12, the third glass plate 16, and the first spacer 18 so as to be in contact with the primary sealing materials 24A and 24B. Glued. The first hollow layer 22 is sealed (sealed) by the secondary sealing material 26 and the primary sealing materials 24A and 24B.

  The second spacer 20 has the same shape as the first spacer 18 and is arranged in a frame shape along the peripheral edges of the second glass plate 14 and the third glass plate 16. The second glass plate 14 and the third glass plate 16 are spaced apart from each other with a certain distance by the second spacer 20. Thereby, the second hollow layer 28 is formed between the second glass plate 14 and the third glass plate 16.

  As for the 2nd spacer 20, the surface facing the 2nd glass plate 14 is closely_contact | adhered (or adhere | attached) to the 2nd glass plate 14 by the primary sealing material 30A. Further, the surface facing the third glass plate 16 is closely attached (or adhered) to the third glass plate 16 by the primary sealing material 30B.

  In addition, a secondary sealing material 32 is filled and bonded to the outside of the second spacer 20 (on the side opposite to the second hollow layer 28). The secondary sealing material 32 fills a concave space formed between the second glass plate 14, the third glass plate 16, and the second spacer 20 so as to be in contact with the primary sealing materials 30A and 30B. Glued. The second hollow layer 28 is sealed (sealed) by the secondary sealing material 32 and the primary sealing materials 30A and 30B.

  As the spacer, a metal spacer mainly made of aluminum is used. However, when it is necessary to reduce the heat conduction in the periphery of the double-glazed glass, a stainless steel material having a relatively low thermal conductivity is used. It is preferable to use a hard resin.

  Moreover, as for a spacer, desiccants, such as a granular zeolite, are filled into a hollow part as needed. Thereby, the air of a hollow layer can be dried. In this case, a vent is provided on the inner side (hollow layer side) of the spacer, and the hollow portion communicates with the hollow layer.

  As the primary sealing material, butyl rubber which is not usually subjected to crosslinking treatment or a material based on polyisobutylene and containing a filler such as carbon black for the purpose of coloring and reinforcement is suitable.

  As the secondary sealant, a material based on a curable elastomer such as polysulfide, silicone, urethane, and the like, which is appropriately modified in order to develop adhesiveness with glass, is suitable.

  According to the fireproof multi-layer glass 10 of the present embodiment configured as described above, the first glass plate 12 and the second glass plate 14 are made of low expansion glass or chemically tempered glass. Since the 3 glass plate 16 is arrange | positioned, a fixed fireproof performance is securable, improving heat insulation. In particular, if the third glass plate 16 is made of chemically strengthened glass, the fireproof double-glazed glass 10 can be thinned, and the total thickness and weight can be reduced. Moreover, since the fireproof double-glazed glass 10 does not use netted glass, good visibility can be ensured.

<< Second Embodiment >>
FIG. 2 is a cross-sectional view showing a second embodiment of the fireproof multilayer glass according to the present invention.

  The fireproof multilayer glass 110 shown in the figure is also a multilayer glass having a configuration in which a third glass plate 116 is disposed between the first glass plate 112 and the second glass plate 114. However, the fireproof multilayer glass 110 is different from the fireproof multilayer glass 10 described above in that it includes a single spacer.

  The first glass plate 112 and the second glass plate 114 are made of ordinary float glass, and the third glass plate 116 is made of low expansion glass or chemically tempered glass. Same as glass 10.

  The first glass plate 112 and the second glass plate 114 are spaced from each other with a spacer 118 interposed therebetween.

  The spacer 118 has a substantially rectangular tube shape with a hollow portion, and is arranged in a frame shape along the peripheral edges of the first glass plate 112 and the second glass plate 114. The first glass plate 112 and the second glass plate 114 are opposed to each other with a certain distance by the spacer 118.

  The surface of the spacer 118 that faces the first glass plate 112 is adhered (or adhered) to the first glass plate 112 by the primary sealant 124A. Further, the surface facing the second glass plate 114 is closely attached (or adhered) to the second glass plate 114 by the primary sealing material 124B.

  A secondary sealant 126 is filled and bonded to the outside of the spacer 118. The secondary sealing material 126 fills and adheres to the concave space formed between the first glass plate 112, the second glass plate 114, and the spacer 118 so as to be in contact with the primary sealing materials 124A and 124B. The The space between the first glass plate 112 and the second glass plate 114 is sealed (sealed) by the secondary sealing material 126 and the primary sealing materials 124A and 124B.

  A holding portion 120 that holds the third glass plate 116 is provided inside the spacer 118 (on the sealed space side). The holding part 120 is constituted by a pair of protruding strips 122 arranged along the longitudinal direction of the spacer 118. The pair of protrusions 122 are arranged on the inner surface of the spacer 118 with a constant interval, and a glass holding groove 128 having a predetermined width is formed therebetween. The peripheral edge of the third glass plate 116 is fitted in the glass holding groove 128 and held by the spacer 118.

  The spacer 118 holds the third glass plate 116 at an intermediate position between the first glass plate 112 and the second glass plate 114. By holding the third glass plate 116 with the spacer 118, the space between the first glass plate 112 and the second glass plate 114 is partitioned by the third glass plate 116, and the first glass plate 112. Two hollow layers composed of the first hollow layer 130 and the second hollow layer 132 are formed between the first glass layer 114 and the second glass plate 114.

  Note that, as described above, the third glass plate 116 is held by the holding portion 120 provided in the spacer 118 and is disposed between the first glass plate 112 and the second glass plate 114. The first glass plate 112 and the second glass plate 114 are smaller in size, and the size is defined by the size of the holding unit 120.

  According to the fireproof double-glazed glass 110 configured as described above, the double-glazed glass is constituted by one spacer 118, so that the structure can be simplified and the productivity is improved. Further, the total thickness and weight of the fireproof double-glazed glass 110 can be reduced, and the design is improved. In particular, when the third glass plate 116 is made of chemically strengthened glass, the thickness can be further reduced, and the total thickness and weight can be further reduced.

  Note that the third glass plate 116 is preferably fixedly attached to the spacer 118 in order to prevent dropping. As a method for fixing the third glass plate 116 to the spacer 118, a method by adhesion, a method by caulking, a method by component joining, or the like can be employed.

  In the case of fixing by bonding, for example, an adhesive is applied to the inner wall surface of the glass holding groove 128 as the bonded portion, and the peripheral edge portion of the third glass plate 116 is fitted into the glass holding groove 128. Thereby, the peripheral edge of the third glass plate 116 is bonded to the inner wall surface of the glass holding groove 128.

  In the case of fixing by caulking, for example, a pair of projecting pieces 122 are configured to be plastically deformable as caulking portions, and after the third glass plate 116 is fitted into the glass holding groove 128, the pair of projecting strips 122 is used. Is plastically deformed to sandwich the third glass plate 116. That is, the third glass plate 116 is fixed by being plastically deformed in a direction in which the third glass plate 116 is sandwiched. In this case, in order to prevent the third glass plate 116 from cracking, it is preferable to interpose an elastic sheet material such as rubber between the pair of protruding strips 122 and the third glass plate 116.

  The method by component joining fixes the 3rd glass plate 116 to a pair of protrusion piece 122 by the fastening means which consists of a volt | bolt and a nut, for example. FIG. 3 is a cross-sectional view of an essential part showing an example in which a third glass plate is fixed by component bonding.

  As shown in FIG. 3, when the third glass plate 116 is fixed using the bolts 134, the pair of protrusion pieces 122 are provided with glass fixing holes 138 for passing the bolts 134. The third glass plate 116 is also provided with a fixing hole 140 corresponding to the glass fixing hole 138. When fixing the third glass plate 116, the third glass plate 116 is fitted into the glass holding groove 128, and then the bolt 134 is passed through the glass fixing hole 138 and the fixing hole 140, and the nut 136 is passed through the bolt 134. Fasten and fix. In addition, it is preferable to comprise so that the fixing | fixed location with the volt | bolt 134 may be suitably adjusted with the size, weight, etc. of the 3rd glass plate 116, and at least four corners of a glass plate are fixed. Also, the number of bolts can be reduced by using together with caulking, bonding, and fitting.

  In FIG. 2, the four sides of the third glass plate 116 are fixed by the spacer 118, but it goes without saying that it may be fixed by only one of the upper, lower, left and right sides. That is, even if the first hollow layer 130 and the second hollow layer 132 partitioned by the third glass plate 116 between the first glass plate 112 and the second glass plate 114 are completely independent. Well, you may be connected.

<< Third Embodiment >>
FIG. 4 is a cross-sectional view showing a third embodiment of the fireproof multilayer glass according to the present invention.

  The fireproof multilayer glass 210 shown in the figure is different from the fireproof multilayer glass 110 of the second embodiment described above in that a suspension member 212 is provided in the spacer. Therefore, only the suspension member will be described here, and the other components will be denoted by the same reference numerals and description thereof will be omitted.

  The suspension member 212 engages with the spacer 118 that holds the third glass plate 116 and the support member 214 that is installed on the sash side, which is the installation part of the fireproof multilayer glass 210. Thereby, it is possible to prevent the third glass plate 116 that can shield the flame from being softened and falling off from the window opening of the building.

  The suspension member 212 is attached to the upper side portion of the spacer 118. The position and number of the hanging members 212 are appropriately set according to the size and weight of the fireproof double-glazed glass 210, but are preferably attached at least at two locations on both ends of the upper side of the spacer 118.

  In the present embodiment, the suspension member 212 includes a round bar-shaped shaft portion 212A and a disk-shaped engagement portion 212B provided at the upper end portion of the shaft portion 212A.

  The shaft portion 212A is provided with a male screw portion 212a at the lower end portion. The spacer 118 includes a female screw portion 216 into which the male screw portion 212a of the shaft portion 212A is screwed. The suspension member 212 is vertically attached to the upper side portion of the spacer 118 by screwing the male screw portion 212a of the shaft portion 212A with the female screw portion 216 of the spacer 118.

  The engaging portion 212B is disposed on the same axis as the shaft portion 212A, and is provided to project from the upper end portion of the shaft portion 212A in a hook shape. The building housing 220 to which the fireproof double glazing 210 is attached is provided with a support member 214 with which the engaging portion 212B is engaged.

  The support member 214 has a substantially rectangular tube shape including a hollow portion 214A in which the engaging portion 212B is accommodated and an insertion hole 214B communicating with the hollow portion 214A, and an upper side portion of the multilayer glass 210 It is arranged along. The hollow portion 214A is formed so that the engaging portion 212B accommodated therein can move in the axial direction. The insertion hole 214B is formed such that the shaft portion 212A can be inserted therethrough and the engagement portion 212B cannot be removed. That is, the engagement portion 212B of the support member 214 is engaged with the inner wall surface of the hollow portion 214A, thereby preventing the third glass plate 116 from falling.

  According to the fireproof double-glazed glass 210 configured as described above, one of the outer glass plates 112 (114) is thermally cracked or softened due to a flame at the time of a fire, and the heat is generated and falls off the fitting. Even so, the third glass plate 116 is suspended and supported by the support member 214 via the spacer 118 and the suspension member 212, can be prevented from falling, and can maintain flameproof performance.

  Further, since the third glass plate 116 does not fall off, the other glass plate (the second glass plate 114 when the fire occurrence side is the first glass plate 112) has a small increase in temperature, and is damaged or softened. Is prevented.

  If an appropriate reflective film is provided on the hollow layer side surface of the third glass plate 116 or the second glass plate 114 (or the first glass plate 112), this effect is further enhanced.

  FIG. 5: is sectional drawing which shows the modification of the fire prevention multilayer glass of 3rd Embodiment.

  In the above configuration, as shown in FIG. 5, if a part of the spacer 118 and a part of the support member 214 are overlapped in the horizontal direction, the flame shielding effect can be further enhanced.

  In the example shown in FIG. 5, a protrusion strip 222 extending in the longitudinal direction of the spacer 118 and extending in the direction of the support member 214 is provided on the upper side portion of the spacer 118, and the support member 214 is provided on the lower surface portion of the support member 214. The protrusions 224 extending in the longitudinal direction and in the direction of the spacer 118 are provided, and both protrusions 222 and 224 are arranged so as to overlap each other with a predetermined gap in the horizontal direction. As a result, a part of the spacer 118 (projection piece 222) and a part of the support member 214 (projection piece 224) are overlapped in the horizontal direction.

  If the engagement portion 212B is always engaged with the hollow portion 214A, a load is applied to the suspension member 212, the spacer 118, and the like. Therefore, when attaching the fireproof multilayer glass 210 to the housing 220, the suspension member 212 is attached. It is preferable that the engagement portion 212B is adjusted and attached so as not to contact the inner wall surface of the hollow portion 214A of the support member 214. This adjustment is performed, for example, by adjusting the height position of the engaging portion 212B with the male screw portion 212a provided in the shaft portion 212A of the hanging member 212.

<< Other Embodiments >>
FIG. 6 is a cross-sectional view showing another embodiment having the same function as that of the suspension member.

  A holder 230 is provided on the spacer 118 so as to be held by the first glass plate 112 and the second glass plate 114. The holder 230 has a plate shape and includes a male screw portion 232. The holder 230 is attached to the upper side portion of the spacer 118 by screwing the male screw portion 232 with the female screw portion 216 provided on the upper side portion of the spacer 118. Also in this form, the function equivalent to a hanging member is obtained.

In the embodiment shown in FIGS. 2 to 6 described above, the holding portion 120 of the third glass plate 116 is configured by the pair of protrusions 122 arranged along the longitudinal direction of the spacer 118. The structure of the holding portion is not limited to this.
As shown in FIG. 7 which shows the perspective view which shows other embodiment of a holding | maintenance part and a suspending member, a pair of clamping piece 300 is provided in each corner part of the spacer 118, and it is 3rd by this pair of clamping piece 300. It can also be set as the structure which pinches | interposes and holds the corner part of the glass plate 116. FIG.

  In the example shown in FIG. 7, a pair of sandwiching pieces 300 having a rectangular plate shape are installed at corner portions of the spacer 118 at intervals corresponding to the thickness of the third glass plate 116, and the pair of sandwiching pieces 300. Thus, the corner portion of the third glass plate 116 is sandwiched and held. In particular, in the example shown in the figure, a pair of sandwiching pieces 300 is provided on the corner key 118A constituting the spacer 118. The corner key 118A is a member that joins the spacer 118 arranged in the vertical direction and the spacer 118 arranged in the horizontal direction at the corner portion, and is a member that can easily process accessory parts such as the hanging member 310. is there.

  In the example shown in the figure, the third glass plate 116 sandwiched between the pair of sandwiching pieces 300 is fixed by fastening means including a bolt 134 and a nut 136. Therefore, the pair of sandwiching pieces 300 are provided with glass fixing holes 302 through which the bolts 134 are passed, and the third glass plate 116 is also provided with fixing holes 304 through which the bolts 134 are passed. It has been.

  In addition, as a method of fixing the third glass plate 116, a method by adhesion, a method by caulking, or the like can be adopted.

  FIG. 8 is a cross-sectional view showing another embodiment for fixing the third glass plate 116 to the spacer 118.

  The fixing method shown in FIG. 8 is a fixing method of the third glass plate 116 similar to caulking. The spacer 118 includes a pair of sandwiching pieces 119 and 119, and the edge portion of the third glass plate 116 is fitted into the gap between the sandwiching piece 119 and the sandwiching piece 119. A countersunk screw 320 is disposed on the side surface of the spacer 118, and a female screw portion 322 fixed to the spacer 118 is disposed in the hollow portion of the spacer 118. According to this fixing method, the third glass plate 116 is clamped 119 by tightening the countersunk screw 320 to the female threaded portion 322 and narrowing the gap between the clamped piece 119 and the clamped piece 119. 119 and fixed to the spacer 118.

  Moreover, in the said embodiment, although the suspension member of the structure provided with the axial part and the engaging part was used as a suspension member, the structure of a suspension member is not limited to this. In the example shown in FIG. 7, the suspension member 310 has a plate shape and includes a hole 312 for suspension. In this case, a hook or the like is provided on the sash side and engaged with the hole 312 to prevent the fall. In the example shown in the figure, the suspension member 310 is provided on the corner key 118A.

  As mentioned above, although embodiment thru | or example of this invention has been explained in full detail with drawing, this invention is not limited to the said embodiment thru | or example, Various in the range which does not deviate from the summary of this invention. Design changes can be made. For example, as the first glass plates 12 and 112 and the second glass plates 14 and 114 constituting the fireproof multilayer glass 10, 110 and 210, besides using a normal float glass plate, tempered glass, laminated glass, A heat-absorbing glass, a glass plate with a thin coating of metal or other inorganic material on the surface, such as heat-reflecting glass or low-reflectance glass, can be used, and is not particularly limited. Further, the surface of the third glass plates 16 and 116 may be thinly coated with a metal or other inorganic material. Further, the fireproof double glazing 10 and 110 may be obtained by replacing the first hollow layers 22 and 130 and the second hollow layers 28 and 132 with a heat insulating gas such as argon or krypton.

According to the present invention, it is possible to suppress the increase in the total thickness and weight while improving the heat insulating property, to be excellent in visibility, to be relatively inexpensive, and to maintain the fire-proof performance for a longer time in the event of breakage. Fire proof double glazing can be obtained.
The entire contents of the specification, claims, drawings, and abstract of Japanese Patent Application No. 2013-083051 filed on April 11, 2013 are incorporated herein as the disclosure of the present invention. .

  DESCRIPTION OF SYMBOLS 10 ... Fireproof multilayer glass, 12 ... 1st glass plate, 14 ... 2nd glass plate, 16 ... 3rd glass plate, 18 ... 1st spacer, 20 ... 2nd spacer, 22 ... 1st Hollow layer, 24A, 24B ... primary sealant, 26 ... secondary sealant, 28 ... second hollow layer, 30A, 30B ... primary sealant, 32 ... secondary sealant, 110 ... fireproof double glazing, 112 ... 1st glass plate, 114 ... 2nd glass plate, 116 ... 3rd glass plate, 118 ... Spacer, 118A ... Corner key, 119 ... Holding piece, 120 ... Holding part, 122 ... Projection piece, 124A, 124B ... primary sealing material, 126 ... secondary sealing material, 128 ... glass holding groove, 130 ... first hollow layer, 132 ... second hollow layer, 134 ... bolt, 136 ... nut, 138 ... hole for fixing glass, 140 ... fixing holes, 210 ... fire protection Layer glass 212 ... Hanging member 212A ... Shaft part 212a ... Male screw part 212B ... Engagement part 214 ... Support member 214A ... Hollow part 214B ... Insertion hole 216 ... Female screw part 220 ... Housing , 222 ... ridge piece, 224 ... ridge piece, 230 ... holder, 232 ... male screw part, 300 ... clamping piece, 302 ... glass fixing hole, 304 ... fixing hole, 310 ... suspension member, 312 ... hole 320 ... Countersunk screw, 322 ... Female thread

Claims (9)

The first glass plate and the second glass plate are spaced apart, and a multi-layer glass configured by sealing the periphery with a sealing material,
A thin third glass plate made of low expansion glass or chemically strengthened glass is provided between the first glass plate and the second glass plate, and the first glass plate and the second glass plate are provided. A fireproof multilayer glass comprising a first hollow layer and a second hollow layer partitioned by a third glass plate between the glass plate and the glass plate.   2. The fireproof multilayer glass according to claim 1, wherein a thickness of the third glass plate is 1.0 to 6.0 mm.   The third glass plate is made of chemically strengthened glass, and is spaced apart from the first glass plate via a first spacer, and spaced apart from the second glass plate and a second spacer. The fireproof double-glazed glass according to claim 1 or 2, wherein A spacer disposed between the first glass plate and the second glass plate;
A holding unit provided in the spacer and holding a third glass plate;
The fireproof multilayer glass according to claim 1, wherein the third glass plate is made of chemically strengthened glass.   The fireproof multilayer glass according to claim 4, wherein the holding portion is configured as a bonded portion to which a peripheral edge of the third glass plate is bonded via an adhesive.   The fireproof multilayer glass according to claim 4, wherein the holding portion is configured as a crimping portion that crimps a periphery of the third glass plate.   The fireproof multilayer glass according to claim 4, wherein the holding portion is configured as a fastened portion to which a peripheral edge of the third glass plate is fastened via a fastening member. A support member disposed above the spacer;
A suspension member that is provided in the spacer, engages with the support member, and suspends and supports the spacer;
The fireproof multilayer glass according to any one of claims 4 to 7, further comprising: The chemically tempered glass is SiO ₂ 56 to 75%, Al ₂ O ₃ 1 to 20%, Na ₂ O 8 to 22%, K ₂ O 0 to 10% in terms of oxide-based mole percentage. MgO and 0-14%, a ZrO ₂ 0 to 5% fire protection insulating glass according to any one of claims 1 8, characterized in that it contains CaO 0%.

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