JP2006219351A - Double-glazed glass - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a double-glazed glass which improves the external appearance of a building after construction because the head or the like of a bolt for fixing the double-glazed glass to a supporting member is not viewed since the glass disposed on the outer side of a room to constitute the outer side of the building is not bored, solves a problem of dew condensation on the supporting member used at the inner side of the room which occurs in the case that a bolt or the like penetrates through, and has the strength coping with a construction method where the supporting member is attached only to the inside glass sheet and the double-glazed glass is fixed by a cantilever support. <P>SOLUTION: A spacer is inserted into the inner side of a periphery of a plurality of glass sheets separated but facing each other, and a pair of glass sheets and the spacer are integrally bonded by using a thermosetting silicone rubber adhesive, as a primary sealing material, having bonding strength of ≥400 N/cm<SP>2</SP>measured by the shear bonding test according to JIS K6850. The periphery of the primary sealing material is sealed by a butyl rubber as a secondary sealing material and a concave part formed by a pair of glass sheets and the spacer at the periphery of the secondary sealing material is filled with a silicone sealant as a ternary sealing material. The double-glazed glass is thus formed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a multi-layer glass suitable for a DPG method in which only the glass on the indoor side of a multi-layer glass is cantilevered and fixed via a glass support member, and a vertical window using the same.

  In general, a double-glazed glass is formed by sandwiching an aluminum metal spacer filled with a desiccant, for example, zeolite, inside the peripheral edges of a pair of opposed glass plates. An internal space that is shielded from the outside air is formed between a pair of glass plates with a butyl rubber as a primary sealing material interposed therebetween. Furthermore, it has a structure in which a silicone sealant or polysulfide is filled as a secondary sealing material between the glass plates on the outer peripheral edge of the primary sealing material and the spacer.

  On the other hand, in modern modern building construction, the sash frame is eliminated and the frameless structure is used. In other words, in order to construct a glass screen, the four corners of the glass plate are machined and bolted. However, the use of a dot point glazing method (hereinafter abbreviated as a DPG method), which is a point support method for forming a wall surface by fixing glass to a glass support member, is increasing. Specifically, in the DPG method, a glass plate is fixedly attached to a glass support member, and a glass support member having an X-shaped or H-shaped arm is provided from the attachment portion, and the glass plate is provided at the arm tip of the support member. This is a glass plate point support method in which glass attachment means such as bolts are inserted into glass attachment holes formed in the four corners of the glass plate to fix the glass plate.

 When the double-glazed glass is constructed by the DPG method, in addition to the heat insulation performance and sound insulation performance inherent to the double-glazed glass, a simple appearance full of openness can be given to the building.

  It is already known from Patent Document 1 to Patent Document 8 that the double-glazed glass is constructed by the DPG method. Both of the pair of glass plates forming the double-glazed glass have holes, and bolts and rivets are formed in the holes. Etc. are penetrated and fixed to the glass support member to constitute the wall surface. For example, as described in Patent Document 1, both of a pair of glass plates forming a multilayer glass are provided with holes in four corners, and the multilayer glass is attached to the support member in a state where sockets, bolts, and the like are passed through the holes. In addition, the periphery of the glass support member is sealed with butyl rubber or the like so that moisture does not enter the internal space of the multilayer glass.

  Further, there is a vertical continuous window in which only the vertical frame is removed without the horizontal sash frame. A vertical window is a glass construction method in which two opposing sides of a glass plate are fixed to a vertical sash as a vertical frame, and the narrow gap formed by the remaining two sides, in other words, a butt joint is sealed with a sealing material. It is. Longitudinal windows look good because the sash, which is the framework and frame, does not have a grid pattern. In the vertical continuous window, it is necessary to provide an invisible seam that is a horizontal material for receiving the weight of the glass plate that cannot be seen from the outside of the room, and to support the glass plate from the indoor side without the eye.

A film-like silicone rubber adhesive is disclosed in Patent Document 9 or Patent Document 10 as a suitable adhesive for bonding glass and metal. Film-like silicone rubber adhesive consists of organopolysiloxane raw rubber, wet-process hydrophobized reinforcing silica and curing accelerator, and is used for glass door handles, window glass handles, automobile fronts, etc. used for building entrances. It is considered promising as an adhesive for attaching mirrors (inner mirrors) attached to glass.
JP-A-8-231250 JP 2000-320047 A JP 2000-104456 A JP-A-9-177442 Japanese Patent No. 3418669 Japanese Patent No. 3152384 Japanese Patent No. 3152383 Japanese Patent No. 3120960 Japanese Patent Publication No.7-119394 JP-A-11-209735

  When constructing double-glazed glass by the DPG method, both the pair of glass plates forming the double-glazed glass are drilled at the four corners, passed through the holes through the bolts, and tightened to the glass support member. By means, it is fixed to the arm tip of the glass support member. The DPG method is an epoch-making method that attaches multi-layer glass without a sash frame, but if a pair of glass plates that make up multi-layer glass are penetrated with bolts etc., the leaking of holes from the outer surface, bolts in winter As a result, cold air is transmitted to the inside through the like, and there is a problem that condensation occurs on the indoor glass support member.

  Further, in the DPG method, a hole is made in only the glass plate on the indoor side out of a pair of glass plates forming the multi-layer glass, and the glass support member is inserted into the hole and then fixed by fixing means. If the support member is constructed so that only the glass plate on the indoor side is cantilevered, the above problem is solved, and furthermore, since the glass on the outdoor side forming the outside of the building is not perforated, the head of the bolt The appearance after construction is improved. However, when the cantilever support is performed using a conventional multilayer glass sealed with a butyl rubber as a primary sealant or a silicone sealant or polysulfide as a secondary sealant on a pair of glass peripheral portions forming a multilayer glass, Because the adhesive strength of the sealing material is insufficient and the strength of the sealing part of the double-glazed glass is insufficient, the double-glazed glass is deformed by the self-weight of the outdoor glass plate forming the double-glazed glass, or the sealing part is displaced and peeled off, There was a problem that there was a concern that the glass plate forming the outside of the building would fall off. In order to solve this problem, a highly rigid adhesive may be used when the primary sealing material has a strong adhesive force instead of butyl rubber and is cured.

  In addition, when using double-glazed glass for a vertical window, it is necessary to lengthen the self-weight bracket that is fixed to the eye and supports the glass in order to support a pair of glass plates. It cannot be avoided. For this reason, there was a concern that water may invade from the thinned seal portion.

  In the present invention, butyl rubber as a primary sealant is pasted between a glass plate and an aluminum spacer at the periphery of the glass plate, and the outer periphery of the aluminum spacer is sealed with a silicone sealant or polysulfide as a secondary sealant. It aims at providing the multilayer glass with the intensity | strength corresponding to the construction method fixed in the cantilever support state which attached the supporting member only to the inner side glass plate which makes a multilayer glass instead of the conventional multilayer glass. .

  In order to provide a multi-layer glass corresponding to a construction method in which only the inner glass plate forming the multi-layer glass is fixed to the glass support member and the multi-layer glass is fixed in a cantilever support state, the outdoor glass forming the multi-layer glass is provided. It is necessary to eliminate the concern that the sealing portion is displaced and peeled off due to the weight of the plate, and the glass plate on the outdoor side falls off due to its own weight. To eliminate concerns, it is necessary to use a material with strong adhesive strength that can withstand a large shear load instead of butyl rubber, which is used because it is not moisture permeable but has no adhesive strength. .

The present inventors replaced the butyl rubber with a primary sealant of 400 N / cm ² in a shear bond test in accordance with JIS K6850 (1999) “Test method for tensile shear bond strength of adhesive-rigid adherend”. In other words, a thermosetting silicone rubber adhesive having an adhesive strength of 0.04 N / m ² was used. Among them, heat-curable silicone rubber adhesives, particularly heat-cured silicone rubber adhesives processed into a film shape, have excellent viscoelasticity and large adhesive force while having flexibility, and the multi-layer glass of the present invention. It is suitably used as a primary sealing material.

  In order to prevent moisture permeation into the internal space of the multilayer glass, the outer periphery of the thermosetting silicone rubber adhesive, which is the primary seal material, may be closed with butyl rubber having low moisture permeability as a secondary seal material. In this state, an extraordinary strength can be obtained by filling the conventionally formed silicone sealant as a tertiary sealant into the concave portion formed by the glass plate on the outer periphery of the butyl rubber and the spacer.

That is, according to the present invention, butyl rubber as a primary sealing material is attached between a glass plate and an aluminum spacer at the periphery of the glass plate, and the outer peripheral portion of the aluminum spacer is formed by a silicone sealant or polysulfide as a secondary sealing material. Instead of the sealed conventional double-glazed glass, a film-like thermosetting silicone rubber adhesive having an adhesive strength of 400 N / cm ² or more in a shear adhesion test in accordance with JIS K6850 (1999) is used as a primary sealing material. In addition, a pair of glasses are strongly bonded and integrated with a spacer, and further, the outer side of the primary sealing material is sealed with butyl rubber having low moisture permeability as a secondary sealing material in order to prevent moisture permeation into the internal space. In addition, the outer periphery of the secondary sealing material made of butyl rubber is tertiary in a recess formed by a pair of glass plates and a spacer. Giving improved structural strength to the double-glazing as Lumpur material, a multilayer glass formed by filling a silicone sealant to provide weather resistance to insulating glass edge.

The multilayer glass of the present invention has a spacer inserted inside the peripheral portions of a plurality of opposed glass plates that are separated from each other, and the pair of glass plates and spacers conform to JIS K6850 (1999) as a primary sealant. Adhering and integrating with a heat curable silicone rubber adhesive having an adhesive strength of 400 N / cm ² or more in a shear adhesion test, and the outer periphery of the primary seal material made of the heat curable silicone rubber adhesive as a secondary seal material The butyl rubber is sealed, and a concave portion formed by a pair of glass plates and a spacer on the outer periphery of the secondary sealing material made of butyl rubber is filled with a silicone sealant as a tertiary sealing material.

Moreover, since the strength of the multilayer glass can be obtained by using a silicone sealant for the tertiary sealant, 400 N is obtained as a primary sealant over the entire circumference of the multilayer glass by a shear adhesion test in accordance with JIS K6850 (1999). It is not necessary to use a thermosetting silicone rubber adhesive having an adhesive strength of / cm ² or more, and it may be used only on two opposite sides.

Furthermore, the present invention is the above-mentioned multi-layer glass, wherein the glass plate is rectangular, and JIS K6850 (1999) as a primary sealing material is bonded to the glass plate and the spacer on two opposite sides thereof. A heat-curing silicone rubber adhesive having an adhesive strength of 400 N / cm ² or more was used in a compliant shear adhesion test, and polyvinyl butyral resin, ethylene vinyl acetate resin, and silicone resin were used as the primary sealing material on the remaining two sides. It is the multilayer glass characterized by this.

  Furthermore, the present invention is the above-mentioned double glazing characterized in that at least one of the pair of double glazings uses tempered glass.

  Furthermore, the present invention is a vertical continuous window characterized by using the above-mentioned multilayer glass.

  In the present invention, a multi-layer glass having a strength corresponding to a method of attaching a support member only to an inner glass plate forming a multi-layer glass and fixing it by cantilever support is provided, and in addition, it is excellent in preventing moisture permeation into the internal space. Multi-layer glass is provided.

  Compared with the conventional DPG method using double-layer glass, the glass plate outside the building does not make a hole, so the head of the bolt for fixing the double-layer glass to the support member can be seen. The appearance after construction is improved. In addition, the condensation on the indoor support member that occurs when the bolt is penetrated by the two glasses is eliminated.

  First, the structure of the multilayer glass will be described.

  FIG. 1 is a schematic cross-sectional view of an end portion of the multilayer glass of the present invention.

As shown in FIG. 1, the multi-layer glass of the present invention has a spacer 1 inserted inside the periphery of a pair of opposed glass plates G and G ′ which are separated from each other, and a shear adhesion test in accordance with JIS K6850 (1999). Using a thermosetting silicone rubber adhesive having an adhesive strength of 400 N / cm ² or more for the primary sealant 2, the pair of glass plates G and G ′ and the spacer 1 are bonded and integrated to form a primary sealant. The outer periphery is sealed with a secondary sealing material 3 made of butyl rubber, and a silicone sealant is used as the tertiary sealing material 4 in the recess formed by the pair of glass plates G and G ′ and the spacer 1 on the outer periphery of the secondary sealing material 3. The structure is filled.

The structural strength of the multi-layer glass is a pair of glass plates G by a thermosetting silicone rubber adhesive having an adhesive strength of 400 N / cm ² or more in a shear adhesion test in accordance with JIS K6850 (1999) which is the primary sealant 2. Although G ′ and the spacer 1 are bonded and integrated, a concave portion formed by the pair of glass plates G and G ′ on the outer periphery of the secondary seal material 3 and the spacer 1 is filled with a silicone sealant as the tertiary seal material 4. As shown in FIG. 1, a pair of glass plates G and G ′ and a spacer 1 are integrated with a silicone sealant by bonding the silicone sealant to the inner surface 3 of the recess, and the silicone sealant as the tertiary sealant 4 is 1 By adding to the next sealing material 2, it contributes to the improvement of the structural strength of the multi-layer glass. Further, the silicone sealant is less likely to be deteriorated with respect to ultraviolet light than butyl rubber, and imparts excellent weather resistance to the multilayer glass of the present invention. The vertical continuous window using the multilayer glass of the present invention is often used as a glass screen on a building outer wall, and it is preferable to use a silicone sealant having excellent weather resistance. A silicone sealant is a suitable material for the sealing material 4.

The double-glazed glass of the present invention needs to adhere and fix a pair of glass plates G and G ′ firmly for a long time with the primary sealing material 2 in order to correspond to a structure in which the outdoor glass plate G is not supported by the glass support member. There is. That is, the primary sealing material needs to have an adhesive strength that can withstand a shear load due to the weight of the outdoor glass plate G over a long period of time. For example, when a multilayer glass is produced using a float glass plate having a thickness of 15 mm and dimensions of 2 m × 3 m, the weight of the glass plate is about 225 kg. When a spacer 1 having a width of 10 mm is used at a site 10 mm inward from the edge of the glass plate and the spacer 1 and the glass plates G and G ′ are bonded by the primary sealant 2, the bonding area is 988 cm ² on one side. The shearing force acting on the primary sealing material 2 at this time is 2.23 N / cm ² . Considering the reduction of the shearing force due to long-term use and safety, the primary sealing material 2 needs an adhesive strength of 400 N / cm ² or more, which is 179 times or more of the shearing force. More preferably, 450 N / cm ² or more which is 202 times or more is necessary. In the present invention, the primary sealant 2 uses an adhesive having an adhesive strength of 400 N / cm ² or more in a shear adhesion test in accordance with JIS K6850 (1999), and an adhesive having an adhesive strength of 400 N / cm ² or more. Examples of the agent include a thermosetting silicone rubber adhesive.

  Heat-curing type silicone rubber adhesive, particularly heat-curing type silicone rubber adhesive processed into a film shape, has flexibility, excellent viscoelasticity and high adhesive strength, and is a primary sealing material for multilayer glass of the present invention. Is preferably used. The curing reaction is a crosslinking reaction due to the opening of the vinyl group represented by the chemical formula of Formula 1. In addition, platinum powder etc. are used for a reaction catalyst.

The heat-curable silicone rubber adhesive processed into a film is, for example, a film-shaped heat-curable silicone rubber adhesive composed of organopolysiloxane raw rubber, wet process hydrophobized reinforcing silica and a curing accelerator. A peroxide is used as an agent (crosslinking reaction initiator). When it is used as the primary sealing material 2 of the double-glazed glass by giving a thickness to the thermosetting silicone rubber adhesive processed into the film shape because it has flexibility and excellent viscoelasticity even after curing. Furthermore, there is no concern that the shear force is applied to the primary seal 2 material due to the difference in thermal expansion coefficient between the spacer 1 and the glass plates G and G ′, and the primary seal 2 is displaced and peeled off or broken.

As a film-like thermosetting silicone rubber adhesive, for example, a trade name, SOTEFA (hereinafter referred to as SOTEFA) marketed by Toray Dow Corning Silicone Co., Ltd. can be used. The adhesive strength when a shear adhesion test is performed at a temperature of 20 ° C. at a temperature when glass and stainless steel are bonded with a size of 12 mm × 25 mm using SOTEFA is 692 N / cm ² . Although SOTEFA has only weak adhesiveness at room temperature and does not have adhesiveness, it exhibits adhesiveness while being cured by heating under pressure.

In the conventional multi-layer glass, adhesive butyl rubber is used for the primary sealant 2 to prevent moisture permeation so that the internal space 4 is damp and the inside of the multi-layer glass is not condensed. Yes. However, butyl rubber only adheres to the double-glazed glass to prevent moisture permeation and does not have the adhesive strength to maintain the structure. Therefore, the structure is maintained by a sealing material filled in a recess formed by a pair of glass plates and a spacer. The adhesive strength of the silicone sealant and polysulfide used as the sealing material is 127.4 N / cm ^{2 to} 176.4 N / cm ² . is there. Even if the double-glazed glass is temporarily cantilevered at the time of attaching the double-glazed glass to the sash or during transportation, the structure is maintained by the sealing material filled in the recess formed by the pair of glass plates and the spacer. Adhesive strength is insufficient to support long-term structural maintenance in a state where the outdoor glass plate G, which is the object of the invention, is not supported by the glass support member and only the indoor glass plate G ′ is cantilevered. is doing.

The secondary sealing material 3 used for the multilayer glass of the present invention uses butyl rubber which prevents moisture permeation. In order to prevent moisture permeation, the moisture permeability under the condition A based on JIS Z0208 (1973) is required to be 2 g / m ² · 24 h or less. In JIS Z0208 (1973), moisture permeability refers to the amount of water vapor that passes through a membranous substance of a unit area in a certain time. At a temperature of 25 ° C. or 40 ° C., a moisture-proof packaging material is used as a boundary surface. When the air on the side is 90% relative humidity and the air on the other side is kept dry by the hygroscopic agent, the weight (g) of water vapor passing through this interface is converted per 1 m ^{2 of} the material in 24 hours. The water vapor permeability in the present invention is a temperature in accordance with JIS Z0208 (1973) at 25 ° C., that is, Condition A, temperature, 25 ± 0.5 ° C., relative Humidity, moisture permeability under temperature and humidity conditions of 90 ± 2%.

In the multilayer glass of the present invention, the butyl rubber used for the secondary sealing material 3 has a low moisture permeability. Silicone as the tertiary sealing material 4 is formed in the recess formed by the pair of glass plates G and G ′ on the outside and the spacer 1. It is preferable to fill with a sealant. The silicone sealant gives structural strength and weather resistance to the edge of the multilayer glass, and by using the silicone sealant for the tertiary sealant 4, auxiliary structural strength can be obtained for the multilayer glass. It is not necessary to use a thermosetting silicone rubber adhesive having an adhesive strength of 400 N / cm ² or more in the shear adhesion test according to JIS K6850 (1999) as the primary sealant 2 on the periphery, and two opposite sides Should be used only for.

In addition, when a thermosetting silicone rubber adhesive having an adhesive strength of 400 N / cm ² or more is used for the entire circumference as a primary sealing material 2 for the entire circumference, a butyl rubber is used in the shear adhesion test in accordance with JIS K6850 (1999). Unlike the case where is used for the primary sealant 2, the pair of glass plates G, G ′ and the spacer 1 are strongly bonded and integrated with a strong adhesive force, and the flexibility of the butyl rubber and the thermosetting silicone rubber adhesive is improved. Due to the difference, stress is generated from the bonded portion to the entire glass plate, and an unstrengthened glass plate that has not been tempered, and a thin glass plate having a thickness of 3 mm or less may be damaged by the stress.

As the primary sealing material 2 on the entire circumference of the multilayer glass, it is not necessary to use a thermosetting silicone rubber adhesive having an adhesive strength of 400 N / cm ² or more in a shear adhesion test in accordance with JIS K6850 (1999). It may be used only on two opposite sides. In addition, the primary sealing material 2 is heated at the time of manufacture, and the pair of glass plates G and G ′ and the spacer 1 are bonded, so that the remaining two sides are polyvinyl butyral which is a material that melts by heating and exhibits adhesiveness. Any of resin, ethylene vinyl acetate resin, or silicone resin may be used. Therefore, the remaining two sides are made of polyvinyl butyral resin, ethylene vinyl acetate resin, or silicone resin as the primary sealing material 2, and the outer periphery of the primary sealing material 2 is made as the secondary sealing material 3 and butyl rubber is used. An end structure of a multi-layer glass in which a concave portion formed by a pair of glass plates G and G ′ and a spacer is filled with a silicone sealant as a tertiary sealant 4 is adopted. Although butyl rubber may be used as the primary sealing material 2, it is easy to foam at the time of heating and pressing in the production of the multilayer glass of the present invention.

  Further, in the double glazing of the present invention, the corner portion of the spacer 1 may be bent in advance to a predetermined size by an autobender, may be welded after being cut obliquely, or fitted using an L-shaped corner key. May be connected.

When the multilayer glass of the present invention is produced, a film-like thermosetting silicone rubber adhesive having an adhesive strength of 400 N / cm ² or more in a shear adhesion test in accordance with JIS K6850 (1999) is used as the primary sealing material 2. After the adhesive is sandwiched between the spacer 1 and the glass plates G and G ′, the adhesive is heated by heating and cured, and butyl rubber is pasted as a secondary sealant 3 on the outside. A silicone sealant as the tertiary sealant 4 is filled into a recess formed by a pair of glass plates and spacers on the outer periphery of the secondary sealant and cured to complete.

In the present invention, the secondary sealing material 3 has a function of suppressing moisture permeability, and may be pasted using a conventionally used butyl rubber tape. However, the moisture permeability under the condition A in accordance with JIS Z0208 (1973). Is heated and melted in a semi-cylindrical shape so as to have a diameter of 1.0 mm to 5.0 mm, as shown in FIG. 1, using a heat-melting butyl rubber of ² g / m ² · 24 h or less. Type butyl rubber may be injected. If the primary sealing material 2 is not completely covered, there is no sealing effect, and the thickness of the primary sealing material 2 is about 1.0 mm, so the diameter of the secondary sealing material 3 is also required to be 1.0 mm or more. . Since it is sufficient to completely cover and seal the primary sealing material 2, the diameter of the secondary sealing material 3 does not have to be 5.0 mm or more.

Further, when producing the double-glazed glass of the present invention, the spacer 1 is filled with a desiccant for absorbing moisture in order to keep the internal space of the double-glazed glass in a dry state, and then bent by an autobender, and the side surface of the spacer 1 is obtained. After bonding, a primary sealing material 2 made of a film-like thermosetting silicone rubber adhesive having an adhesive strength of 400 N / cm ² or more in a shear adhesion test in accordance with JIS K6850 (1999) is attached to the glass plate G However, since there is moisture absorption of the desiccant 6, the desiccant is applied after the primary sealing material 2 is adhered to the spacer 1 and bonded to a pair of glasses. 6 is more preferable. Among the four sides of the spacer 1 inside the outer peripheral edges of the pair of glass plates G and G ′, at least two holes are provided in advance in the inner space 5 side, and a desiccant 6 is provided therefrom. Alternatively, the desiccant 6 may be filled from the connection portion of the spacer 1.

  In addition, when a pair of glass plates G and G ′ are bonded and integrated with the spacer 1 using a heat-curable silicone rubber adhesive processed into a film as the primary sealing material 2, the pressure is applied in a pressure heating furnace. Heat treatment is preferable. The thermosetting silicone rubber adhesive is melt-bonded by heating in a pressurized state.

  If pressure is applied to the double-glazed glass during pressure heat treatment, it may be damaged. In order not to damage, it is only necessary to apply pressure without sealing the internal space 5, and there is no problem if the hole through which the glass supporting member is passed is made in the glass plate first. What is necessary is just to make the hole which penetrates the multilayer glass exterior and internal space 5 in the spacer 1 of a side.

  In the double-glazed glass of the present invention, the glass support member is fixed to only the indoor glass plate G ′ of the pair of single-sided glass plates G and G ′ forming the double-glazed glass, and the double-glazed glass is cantilevered. In order to correspond to the construction method supported in the state, when the tempered glass having strength is used for the indoor side glass plate G ′ fixed to the glass support member, there is less concern about bending and breakage, so at least the glass support member It is preferable to use tempered glass for the indoor glass plate G ′ to be fixed.

  Next, a method for fixing the multilayer glass of the present invention via a glass support member will be described.

  FIG. 2 is a cross-sectional view for explaining an example of a method for fixing the multilayer glass of the present invention via a glass support member.

As shown in FIG. 2, among the pair of glass plates G and G ′, the multilayer glass of the present invention provided with a hole for inserting a glass supporting member into the indoor glass plate G ′ is used. The support member is sealed and fixed after insertion, and the multilayer glass is fixed through the glass support member. In order to suppress moisture permeation, it is preferable to use a heat-melt butyl rubber having a moisture permeability of 2 g / m ² · 24 h or less under the condition A based on JIS Z0208 (1973).

  FIG. 3 is a cross-sectional view for explaining an example of a construction method for fixing the multilayer glass of the present invention via a glass support member.

As shown in FIG. 3, a glass support member, for example, a metal disc 8 is bonded and fixed to a glass plate G ′ on the indoor side among the pair of glass plates G and G ′ using the multilayer glass of the present invention. In order to withstand the shearing force due to the weight of the double-glazed glass, the adhesive 9 is a one-component heat-curing type silicone rubber-based adhesive having an adhesive strength of 400 N / cm ² or more in a shear adhesion test in accordance with JIS K6650 (1999). It is preferable to use an agent. If this method is used, it is not necessary to provide holes in the glass plate.

  In the above construction method, it is preferable to use tempered glass having at least strength for the indoor side glass plate G ′ fixed to the glass support member among the pair of glass plates G and G ′ forming the multilayer glass.

  FIG. 4 is a perspective view of an example of a glass support member that supports the multilayer glass of the present invention.

  Moreover, the multilayer glass of this invention forms an external screen by the said construction method, for example by fixing to a glass holding member shown in FIG. 4 by bolting, adhesion | attachment, etc.

  Next, a vertical window using the multilayer glass of the present invention will be described.

  FIG. 5 is a plan view of the vertical window.

  As shown in FIG. 5, for example, the vertical continuous window made of double-glazed glass is obtained by vertically arranging double-glazed glass 11 on a frame 10 that is a vertical frame sash on both sides. Sealing material is filled in the butt joints 12 which are the gaps between them to prevent rainwater from entering. On the indoor side, there is a blank (not shown) which is a horizontal material for receiving the weight of the multilayer glass 11 and supports the multilayer glass 11.

  FIG. 6 is a schematic cross-sectional view for explaining an example of a vertical continuous window in which a conventional multilayer glass is fixed in an eyeless manner.

As shown in FIG. 6, in a conventional continuous glass window, a pair of glass plates G and G ′ constituting the double-glazed glass are fixed to the mesh 13 by welding or bolting in order to support both. It was necessary to lengthen the weight holder 14. For this reason, the thickness of the sealing material of the butt joint 12 where the weight receiving metal fitting 14 is present is small and prevents water from entering, in other words, the thickness of the sealing agent cannot be sufficiently secured for waterproofing. is there. However, when the multilayer glass 11 of the present invention is used, the self-weight of the outdoor glass plate G has an adhesive strength of 400 N / cm ² or more in a shear adhesion test based on JIS K6850 (1999) inside the multilayer glass. Since it is held by the primary sealing material 2, for example, a film-like thermosetting silicone rubber adhesive, only the glass plate G 'on the indoor side needs to be supported by its own weight receiving bracket.

  FIG. 7 is a schematic cross-sectional view for explaining an example of a vertical continuous window in which the multi-layer glass of the present invention is fixed with no eye.

  As shown in FIG. 7, if the multi-layer glass 11 of the present invention is used, the weight holder 14 is shortened and only the indoor glass plate G ′ is supported, the butt joint 12 at the position where the weight holder 14 is located. A sufficient thickness of the sealing material is ensured.

  FIG. 8 is a schematic cross-sectional view for explaining an example of a construction method in which the double-glazed glass is fixed in a standing manner without being fixed invisible.

  FIG. 9 is a schematic cross-sectional view in the vertical direction of A and A ′ in FIG. 8 for explaining an example of a method of fixing the double-glazed glass in a vertical manner without fixing it in an invisible manner.

As shown in FIG. 8 and FIG. 9, even if the weight holder 14 is welded or bolted to the frame 10 which is a sash as a vertical frame of the vertical continuous window, the multilayer glass 11 of the present invention is used. For example, the self-weight of the glass plate G on the outdoor side is a primary sealing material having an adhesive strength of 400 N / cm ² or more in a shearing adhesion test based on JIS K6850 (1999) inside the multi-layer glass, for example, a film-like heat curing It is only necessary to support the glass plate on the indoor side, supported by a silicone rubber adhesive.

Example 1
FIG. 10 is a plan view of a tempered glass plate having holes at four corners.

  As shown in FIG. 10, a tempered glass plate G ′ having a thickness of 12 mm, dimensions of 900 mm × 1800 mm, with holes 7 formed at four locations, was prepared as a glass plate G ′ on the indoor side when it was made into a multilayer glass. The size of the hole 7 is 48.5 mm in diameter. Moreover, as the glass plate G on the outdoor side when the double-glazed glass was used, a tempered glass plate G having a thickness of 10 mm, dimensions of 900 mm × 1800 mm without holes was separately prepared.

  FIG. 11 is a plan view showing a position where the adhesive is attached to the tempered glass plate.

  As shown in FIG. 11, the glass plate G on which the hole 7 is not opened is placed on the pattern paper in which the adhesive attaching position 15 is described, and 10 mm inward from the outer peripheral edge, 10 mm in width in the vertical direction. As a film-like heat-curable silicone rubber adhesive, a product name, SOTEFA, manufactured by Toray Dow Corning Silicone Co., Ltd. was attached to a position 15A where the spacer 1 of the above was adhered to the position 15A. Next, a polyvinyl butyral resin sheet was attached to the position 15B where the spacers 1 on the two sides in the horizontal direction were bonded. Further, SOTEFA was attached to the position 15A on the spacer 1 according to the size, and then a polyvinyl butyral resin sheet was attached to the position 15B on the spacer 1 on the two sides in the lateral direction. Finally, tempered glass G ′ having holes 7 in four places was superposed.

  The spacer 1 is made of aluminum, the corner portions are connected with a corner key, and a hole with a diameter of 5 mm for filling the desiccant 6 is formed in each of the three sides of the spacer 1 in advance on the outer side. The corner key is also made of aluminum.

  Since it cannot be mounted after the double-glazed glass is produced, the double-glazed glass and the glass supporting member are fixed to the indoor glass plate G ′ as shown in FIG. The steel tube 16 for attaching the glass plate, the film packing 17 and the retaining ring 18 were attached, and the retaining ring 18 was fastened to the steel tube 16 by being screwed together and fixed by screwing.

Next, in order to firmly bond and integrate the pair of glass plates G and G ′ and the spacer 1, the glass plate G ′ is placed in the pressure heating furnace with the upper side and the pressure is 102.9 N / cm ² , that is, 1 0.03 × 10 ² Pa, temperature, held at 135 ° C. for 20 minutes. SOFTEA is melted by heating in a pressurized state and is pressed against the spacer 1 by its own weight in the molten state, and the pair of glass plates G and G ′ and the spacer 1 are strongly bonded and integrated. To do. Also, the polyvinyl butyral resin is melted by heating in a pressurized state, and in the molten state, the glass plate G ′ is pressed by the spacer 1 by its own weight, thereby bonding the pair of glass plates G, G ′ and the spacer 1 together. Integrate.

  After cooling, from the hole formed on the outside of the spacer 1, the drying material 6 is filled with zeolite (product name, Zeolum A-3, manufactured by Tosoh Corporation) into the spacer 1, and aluminum adhesive is used to prevent moisture permeation. The tape was applied to all the outer holes and sealed.

  Next, as shown in FIG. 1, a butyl rubber tape was attached as a secondary sealing material 3 only to the outer periphery of the primary sealing material 2. After sticking so as to complete the sealing, a rod-shaped jig (not shown) was used to make a semicircular shape so as to be pushed into the recessed portion of the spacer 1. The butyl rubber tape used was the same as that used for conventional multilayer glass. The double-glazed glass of the present invention was completed by filling the silicone sealant as the tertiary sealant 4 into the recess formed by the pair of glass plates G and G ′ on the outer periphery of the secondary sealant 3 and the spacer 1 and curing.

  Furthermore, after making the nozzle of the hot melt butyl discharge device narrow and removing the outer retaining ring 13, as shown in FIG. 2, the gap between the steel tube 11 and the glass hole 7 was filled with the hot melt butyl 19, The film packing 17 was mounted again, and the retaining ring 18 was screwed to obtain the multilayer glass of the present invention.

  In addition, as shown in FIG. 2, since the inside of the steel pipe 11 has also been screwed, it is fixed to the glass holding member shown in FIG. A glass screen may be constructed by sealing with hot melt butyl or silicone sealant, and without inserting a screw inside the steel pipe 11, a steel pin is inserted, and the insertion portion is hot melt butyl or silicone. A glass screen may be constructed by sealing with a sealant.

  In order to evaluate the moisture permeability of the seal part of the produced multilayer glass, the multilayer glass having the above structure was produced in a size of 300 mm × 350 mm, and an open-air test was conducted according to JIS R3208 (1998) “Multilayer glass”. As a result, the dew point was −53 ° C., 2 days, −61 ° C., 3 days, and −70 ° C. after 1 day, satisfying the moisture permeability as a multilayer glass.

It is a schematic sectional drawing of the edge part of the multilayer glass of this invention. It is sectional drawing for demonstrating an example of the construction method which fixes the multilayer glass of this invention through a glass support member. It is sectional drawing for demonstrating an example of the construction method which fixes the multilayer glass of this invention through a glass support member. It is a perspective view of an example of the glass support member which supports the multilayer glass of this invention. It is a top view of a vertical window. It is a schematic sectional drawing for demonstrating an example of the vertical continuous window which fixed the conventional multilayer glass to the eyes. It is a schematic sectional drawing for demonstrating an example of the vertical continuous window which fixed the multilayer glass of this invention unattended. It is a schematic sectional drawing for demonstrating an example of the construction method which fixes a double-glazed glass in an eye shape without fixing. It is a schematic sectional drawing in A and A 'of FIG. 8 for demonstrating an example of the construction method which fixes a double-glazed glass to a side face without fixing. It is a top view of the tempered glass board which opened the hole in four corners. It is a top view which shows the sticking position of the adhesive agent to a tempered glass board.

Explanation of symbols

G, G 'Glass plate 1 Spacer 2 Primary seal material 3 Secondary seal material 4 Tertiary seal material 5 Internal space 6 Desiccant 7 Hole 8 Disc 9 Adhesive 10 Multi-layer glass 12 Butt joint 13 14 Self-weight receiving brackets 15A, 15B Affixing position 16 Steel pipe 17 Film packing 18 Stop ring 19 Hot melt butyl 20 Metal rod

Claims (4)

A spacer is inserted inside the periphery of a plurality of opposed glass plates that are separated from each other, and the pair of glass plates and the spacer is 400 N / cm ² in a shear bonding test in accordance with JIS K6850 (1999) as a primary sealant. The heat-curable silicone rubber adhesive having the above adhesive strength is bonded and integrated, and the outer periphery of the primary sealing material made of the heat-curable silicone rubber adhesive is sealed with butyl rubber as the secondary sealing material. Further, a multilayer glass comprising a pair of glass plates on the outer periphery of the secondary sealing material made of butyl rubber and a recess formed by a spacer filled with a silicone sealant as a tertiary sealing material. It is the double glazing of Claim 1, Comprising: The said glass plate is a rectangle, Comprising to JIS K6850 (1999) as a primary sealing material for adhesion of a glass plate and a spacer in the two opposing sides. A heat-curing silicone rubber adhesive having an adhesive strength of 400 N / cm ² or more was used in the shear adhesion test, and polyvinyl butyral resin, ethylene vinyl acetate resin, and silicone resin were used as the primary sealant on the remaining two sides. Characteristic multilayer glass. The multilayer glass according to claim 1 or 2, wherein at least one of the pair of multilayer glasses uses tempered glass. A vertical continuous window using the multilayer glass according to any one of claims 1 to 3.