JP3382709B2 - Double glazing for structural silicone construction - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double glazing used in a structural silicone construction method. 2. Description of the Related Art A heat ray reflecting glass, a heat ray absorbing glass, a double glazing,
Various types of sheet glass such as laminated glass, colored glass, crystallized glass, panel materials made of reinforced resin, ceramics and the like are mounted. As an example of such a support structure for a panel material, a structural silicone construction method is known. This structural silicone construction method includes a metal edge material made of aluminum or the like that substantially supports the panel material, and a structural sealing material made of silicone rubber or the like that joins the edge material and the panel material. [0003] In a double-glazed glass for structural silicone construction, the two glass plates constituting the double-glazed glass are usually the fourth glass.
A metal spacer containing a desiccant is placed inside a primary sealing material such as butyl resin at the periphery of the side, and the metal spacers are separated from each other. The spacer has a predetermined thickness between two glass plates. Air layer is secured, and a structural sealing material such as silicone rubber is poured between the outer peripheral portion of the spacer and the two glass plates, and the spacer and the glass plate are bonded and fixed, and moisture from the outside is removed. Prevents intrusion. Since the silicone rubber bears the wind pressure, it is mounted with a sufficient adhesive width to withstand an external force. Since a material having excellent durability against external force deformation is used as the silicone rubber, there is little problem with wind pressure and in-plane deformation. However, in the structural silicone construction method, since the glass panel is exposed without being covered with a sash, the primary seal between the spacer of the multilayer glass and the glass plate is exposed when the glass panel is a multilayer glass. Exposed to static conditions and used for a long period of time, the durability of the sealing part, especially the primary seal part made of butyl rubber, particularly the moisture permeability is impaired, and there is a problem that dew condensation easily occurs inside the double glazing. . An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a double-glazed glass for structural silicone construction having improved durability against internal dew condensation. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has at least two glass plates with a primary sealing material interposed therebetween at the periphery thereof. At least two sheets of double-glazed glass in which a spacer is disposed and spaced, and the periphery thereof is sealed with a secondary sealing material so that a closed space is formed between the spacer and at least two glass sheets. At least part of the periphery of the plate is provided with two spacers side by side, and the spacers are
Contact the glass plate with butyl resin over the entire width contacting the glass plate
Separate the glass plates by increasing the width and bonding
The edges are sealed with silicone rubber, and two juxtaposed
Of the spacers, at least inside the inner spacer
Provided is a double glazing for structural silicone construction, which comprises a desiccant . [0007] The Contact, since the structure silicone construction method in usually carried out only the vertical side of the double glazing, in such a case, constitute the periphery of at least the longitudinal side of the insulating glass as spacers are two juxtaposed No problem. As shown in FIG. 1, a spacer made of aluminum, zinc, iron plate, or the like and having a rectangular tube cross section and having a gap or a hole communicating with the closed space of the double-glazed glass is used. Is done. Further, a colored coating layer for concealing the spacer, the primary sealing material and the secondary sealing material,
The glass plate may be provided on the surface of the glass plate in contact with the primary sealing material and the secondary sealing material. The silicone rubber is excellent in durability against external deformation, but is not sufficiently durable for a long period of time due to its high moisture permeability. On the other hand, butyl resin as a primary sealing material has a function of preventing infiltration of moisture and has a function of internal condensation durability. However, the width can be larger than the bonding width of butyl resin specified by the spacer width. Since there is no,
In the structural silicone construction method, the internal dew condensation durability was not actually sufficient. Therefore, in the past, a single spacer was attached around the glass plate, but by attaching two spacers around the glass plate, two spacers are arranged in parallel only on the vertical side where the normal structure silicone construction method is particularly performed. As a result, the depth of the butyl resin from the peripheral portion could be increased, and the internal condensation durability of the double-glazed glass could be improved. FIG. 1 is a sectional view of a main part of a double-glazing unit 13 for a structural silicone method according to an embodiment of the present invention.
The two glass plates 4, 4 are attached to the periphery of the
1 are arranged side by side in the direction of the main surface of the glass plate, and the spacers are adhered to the glass plate with butyl resin 2 over the entire width in contact with the glass plate. Sealed with silicone rubber 3,
A closed space 5 is formed between the spacer and the glass plate. As the spacer, as shown in FIG. 1, a spacer having a rectangular cross section made of aluminum, zinc, iron plate or the like and having a gap or a hole communicating with the closed space of the multi-layer glass is used. Is done. Although not shown, a colored coating layer for concealing the spacer, the primary sealing material and the secondary sealing material may be provided on the surface of the glass plate where the glass plate contacts the primary sealing material and the secondary sealing material. . In addition, 6 is a desiccant. FIG. 2 is an external view of the outer wall of the building, and shows the outer wall of the building in which the double glazing 13 is formed by the structural silicone method. Note that 7 is blind and 8 is cubic. FIG. 3 is a sectional view taken along the line AA of FIG. 2 in the case where the present invention is carried out. A double-layer glass 13 is attached to a back mullion 10 by a structural seal 9.
In addition, a backup material 12 is sandwiched between the multilayer glass 13 and an adjacent multilayer glass 13, and a weather seal 11 is provided thereon. The backup material 12 is also provided between the double-glazed glass 13 and the back mullion 10 and between the structural seal 9 and the adjacent structural seal 9. FIG. 4 is an explanatory view of the structure of the double-glazing unit 13 and shows how the spacers 1 are arranged.
(A) is a conventional type, which is a single spacer. (B) and (c) show the type of the present invention, and (b)
The figure shows a double spacer in which two spacers are arranged side by side on all four sides, and the figure (c) shows a double spacer only on the vertical side where the normal structural silicone construction method is performed. Although not shown, in special cases such as when the structural silicone construction method is performed only on the horizontal side, only the upper and lower sides may be double spacers. FIG. 5 is a cross-sectional view of a main part of a double-glazing unit 13 for a structural silicone method according to a conventional example. A spacer 1 is interposed between the two glass plates 4 and 4 and the glass plates 4 and 4 are separated by bonding the spacers to the glass plates with butyl resin 2 over the entire width in contact with the glass plates of the spacers. The periphery is sealed with silicone rubber 3 so that a sealed space 5 is formed between the spacer and the glass plate. A test was conducted to compare the internal condensation durability of the double glazing for structural silicone construction of the present invention with that of the conventional type. Table 1 shows the results of comparing the durability between the conventional double-glazed glass for structural silicone construction and the double-glazed glass for structural silicone construction of the present invention in a high-temperature, high-humidity atmosphere of 60 ° C. and 95% RH. As can be seen from Table 1, the effect of preventing the intrusion of moisture is dramatically increased in the double glass for structural silicone construction of the present invention as compared with the conventional double glass for structural silicone construction. [Table 1] According to the present invention, it has been found that the internal condensation durability of the double-glazed glass for structural silicone method greatly depends on the adhesion width of the butyl resin, and in order to cope with such a cause, a spacer is provided around the periphery of the glass plate. By juxtaposition, the adhesion width of the butyl resin was increased, and the internal condensation durability of the double-glazed glass was significantly improved. That is, the present invention correctly grasps the cause of the problem of internal dew condensation, and, based on this recognition, inexpensively reducing the number of double spacers, and at a seemingly simple manner with good workability, the excellent effects as already described. To play.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a main part of a double glazing for structural silicone construction according to one embodiment of the present invention. FIG. 2 is an external view of a building outer wall surface. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 2. FIG. 4 is an explanatory diagram of a configuration of a double-glazing. FIG. 5 is a cross-sectional view of a main part of a double-glazing for a structural silicone construction method according to a conventional example. : Spacer 2: butyl resin (primary seal) 3: silicone rubber (secondary seal) 4: glass plate 5: closed space 6: desiccant 7: blind 8: cubic 9: structural seal 10: back mullion 11: Weather seal 12: Backup material 13: Double glazing

Claims (1)

(57) [Claims 1] At least two glass plates are spaced apart from each other by placing a spacer around the periphery thereof with a primary sealing material interposed therebetween, and the peripheral edge thereof is secondary sealed. In a double-layer glass sealed by a material so that a sealed space is formed between the spacer and the at least two glass plates, two spacers are arranged in at least a part of a peripheral portion of the at least two glass plates. And extends the spacer over the entire width in contact with the glass plate.
To the glass plate with butyl resin
To separate the glass plate, and surround its periphery with silicone rubber.
Seal, and of the two spacers
A double glazing for structural silicone construction, characterized in that a desiccant is contained inside the inner spacer .