JP2013204279A - Double window structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double window structure in which heat insulating performance can be improved.SOLUTION: A double window structure 10 is comprised of an outer window 16 and an inner window 18. The inner window 18 is disposed while being isolated from the outer window 16 via an air layer 20. On indoor side faces 24, 24 of two glass panes 22, 22 constituting the outer window 16 and on outdoor side faces 28, 28 of two glass panes 26, 26 constituting the inner window 18, low radiation films 30 each mainly comprised of tin oxide are provided, respectively. Thus, in comparison with a double window structure in which the low radiation films 30 are not provided, heat insulating performance is improved. Furthermore, the low radiation film 30 mainly comprised of tin oxide is unlikely to be oxidized and the mechanical durability thereof is higher in comparison with a low radiation film 80 mainly comprised of silver. Therefore, even when the low radiation films 30 are provided on indoor side faces 24 or outdoor side faces 28 opposed to the air layer 20 communicating to outside air, the low radiation films 30 are not oxidized and are not easily damaged, either.

Description

  The present invention relates to a double window structure.

  When window glass is used as the outer wall of a building, in order to increase the efficiency of indoor air conditioning, a predetermined heat insulation performance (heat transmissivity: U value (JIS R3107: 1998)) is required. Then, it is in the tendency for a multilayer glass to be used as a glass plate of a window glass.

  As is well known, double-glazed glass has a higher heat insulating property and a lower U value than a single glass plate. However, Patent Document 1 discloses that a predetermined heat insulation performance cannot be obtained simply by using two or three layers of glass having two or three glass plates with the same thickness. ing.

Patent Document 1 discloses a multi-layer glass having Low-E (Low-emissivity) glass for the purpose of reducing the U value and enhancing the heat insulation performance. This Low-E glass has a low emission film (a low emission film mainly composed of tin oxide (SnO ₂ ) or a low emission film mainly composed of silver (Ag)) formed on a surface of a glass plate by using a sputtering apparatus or the like. It is formed into a film and has a function of reducing the emissivity of thermal energy by infrared rays. That is, Low-E glass has the performance of being difficult to pass heat, and thus has an advantage of high heat shielding properties and heat insulation properties.

  In addition, since the low emission film mainly composed of silver has a property of being easily oxidized by moisture in the air, it is formed on the side facing the hermetically sealed hollow layer when used for double-glazed glass. Is common.

  Further, the low radiation film mainly composed of tin oxide has lower heat ray reflection performance than the low radiation film mainly composed of silver, that is, the heat shielding property is low because the U value is high and the emissivity ε is high. On the other hand, the low emission film mainly composed of tin oxide has the advantage that it is difficult to oxidize and has high mechanical durability compared to the low emission film mainly composed of silver, and thus is hardly damaged.

  By the way, recently, as disclosed in Patent Document 2, a saddle member for a shoji and a saddle member for a shoji are built in a window frame of a window opening of a building. 2. Description of the Related Art A double window structure having a heat insulating structure in which a glass plate is fitted to a shoji screen is known. In the double window structure of Patent Document 2, a double-layer glass is used as the glass plate of the outer window, and a single glass plate is used as the glass plate of the inner window.

JP 2005-60141 A JP 2007-92405 A

  As described above, Patent Document 1 discloses a multi-layer glass using Low-E glass in order to enhance the heat insulation performance. Patent Document 2 discloses a double window structure using a double-layer glass as a glass plate for an outer window and a single glass plate as a glass plate for an inner window.

  An object of the present invention is to provide a double window structure having excellent heat insulation performance that does not exist in the double window structure described in Patent Document 2, and Does not disclose a specific configuration for achieving the object.

  In addition, a double window structure refers to the thing of the form which the air layer interposed between an outer window and an inner window is not sealed with respect to external air, and was connected with external air. Therefore, the structure of the double window structure targeted by the present invention is fundamentally different from the double glazing of Cited Document 1 in which the hollow layer is sealed against the outside air.

  This invention is made | formed in view of such a situation, and it aims at providing the double window structure which can improve heat insulation performance.

  In order to achieve the above object, the present invention provides an outer window provided in a window opening of a building, and is provided in the window opening and disposed on the indoor side of the building with respect to the outer window. And a double window structure comprising an inner window spaced from the outer window through an air layer communicating with the outside air, the interior side surface of the glass plate of the outer window, or the glass plate of the inner window Provided is a double window structure characterized in that a low radiation film mainly composed of tin oxide is provided on at least one of the outdoor side surfaces.

  According to the double window structure of the present invention, the low radiation film mainly composed of tin oxide is provided on at least one of the indoor side surface of the glass plate of the outer window or the outdoor side surface of the glass plate of the inner window. Therefore, heat insulation performance can be improved as compared with the double window structure without the low radiation film. In addition, the low-emission film mainly composed of tin oxide is difficult to oxidize and has higher mechanical durability than the low-emission film mainly composed of silver, so it is provided on the side facing the air layer that communicates with the outside air. However, it does not oxidize and is not easily damaged.

  The glass plate of the outer window of the present invention is a double glazing glass for an outer window, the glass plate of the inner window is a glazing glass for an inner window, and the indoor side surface of the indoor glass plate of the glazing glass for the outer window. Or it is preferable that the low radiation film | membrane which has the said tin oxide as a main body is provided in at least one surface among the outdoor side surfaces of the outdoor side glass plate of the said multilayer glass for inner windows.

  The present invention is an invention in which the glass plates of both the outer window and the inner window are composed of double glazing, and in this case, the indoor side surface of the indoor side glass plate of the double glazing for the outer window, or the inner window What is necessary is just to provide the low radiation film | membrane which has tin oxide as a main body in at least one surface among the outdoor side surfaces of the outdoor side glass plate of the multilayer glass for use.

  According to the present invention, the indoor side surface of the outdoor glass plate of the multilayer glass for outer window, the outdoor surface of the indoor glass plate of the multilayer glass for outer window, and the indoor glass plate of the multilayer glass for inner window It is preferable that a low radiation film mainly composed of silver is provided on at least one of the outdoor side surface of the glass and the indoor side surface of the outdoor side glass plate of the multilayer glass for the inner window.

  According to the present invention, compared with a low radiation film mainly composed of tin oxide, a low radiation film mainly composed of silver having a high heat ray reflection performance and a high heat shielding property is provided on at least one of the surfaces. By providing, heat insulation performance can be improved further. The low-emission film mainly composed of silver is easy to oxidize and has lower mechanical durability than the low-emission film mainly composed of tin oxide, but is provided on the surface side facing the sealed hollow layer of the double-glazed glass. As a result, it is possible to eliminate the concern that oxidation is easy and mechanical durability is low.

  The glass plate of the outer window of the present invention is a single plate glass for an outer window, the glass plate of the inner window is a double-layer glass for an inner window, the indoor side surface of the single plate glass for an outer window, or the inner window double plate glass. It is preferable that a low radiation film mainly composed of the tin oxide is provided on at least one of the outdoor side surfaces of the outdoor glass plate of the layer glass.

  The present invention is an invention in the case where the glass plate of the outer window is constituted by a single plate glass for the outer window, and the glass plate of the inner window is constituted by a double glazing glass for the inner window. Alternatively, a low radiation film mainly composed of tin oxide may be provided on at least one of the outdoor side surfaces of the outdoor side glass plate of the inner glass double-layer glass.

  According to the present invention, silver is mainly used on at least one of the outdoor side surface of the indoor side glass plate of the double-walled glass for inner window or the indoor side surface of the outdoor side glass plate of the double-sided glass for inner window. It is preferable that a low radiation film is provided.

  According to the present invention, compared with a low radiation film mainly composed of tin oxide, a low radiation film mainly composed of silver having a high heat ray reflection performance and a high heat shielding property is provided on the indoor side of the multilayer glass for inner windows. By providing at least one of the outdoor side surface of the glass plate or the indoor side surface of the outdoor side glass plate of the multilayer glass for the inner window, the heat insulation performance can be further enhanced. The low-emission film mainly composed of silver is easy to oxidize and has lower mechanical durability than the low-emission film mainly composed of tin oxide, but is provided on the surface side facing the sealed hollow layer of the double-glazed glass. As a result, it is possible to eliminate the concern that oxidation is easy and mechanical durability is low.

  The total U value of the double window structure can be calculated by adding the conductance of the outer window, the thermal resistance of the inner window, and the thermal resistance of the air layer and taking the reciprocal.

  Further, the thickness (width) of the air layer interposed between the outer window and the inner window is preferably 50 mm to 150 mm in view of the size of the window frame. Further, when air convection is generated inside the air layer, the heat insulation performance is lowered and the U value is increased. Therefore, in order to suppress convection generation, the thickness is more preferably 80 mm or less. Furthermore, if a convection suppressing member such as a partition plate that suppresses convection is disposed in the air layer, the heat insulation performance can be improved, which is even more preferable.

  The double window structure of the present invention can be applied to a sliding window and a fitting window that are not used for entering and exiting a person, and can also be applied to a window used for entering and exiting a person such as a window for a terrace.

  As described above, according to the present invention, a double window structure with high heat insulation performance can be provided.

The perspective view which showed the basic composition of the double window structure of embodiment Longitudinal sectional view of the double window structure shown in FIG. The longitudinal cross-sectional view which expanded and showed the principal part of the double window structure shown in FIG. The longitudinal cross-sectional view which expanded and showed the principal part of the double window structure of other embodiment The longitudinal cross-sectional view which expanded and showed the principal part of the double window structure of a 1st comparative example The longitudinal cross-sectional view which expanded and showed the principal part of the double window structure of a 2nd comparative example

  Hereinafter, preferred embodiments of a double window structure according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing a basic configuration of a double window structure 10 according to an embodiment. FIG. 2 is a longitudinal sectional view of the double window structure 10 shown in FIG.

  The double window structure 10 according to the embodiment includes an outer window 16 and an inner window 18 provided in the window opening 14 of the building 12 indicated by a two-dot chain line in FIG. The inner window 18 is disposed on the indoor side of the building 12 with respect to the outer window 16, and is spaced apart from the outer window 16 via the air layer 20. The air layer 20 is not sealed (sealed) by the outer window 16 and the inner window 18 and communicates with the outside air.

  The double window structure 10 according to the embodiment includes two glass plates 22 and 22 and two glass plates 22 and 22 that constitute the outer window 16 and the inner windows 18 as shown in FIG. Low radiation films 30 mainly composed of tin oxide are provided on the outdoor side surfaces 28, 28 of the plates 26, 26, respectively. The low radiation film 30 may be provided on at least one of the indoor side surface 24 and the outdoor side surface 28. However, the low radiation film 30 is provided on the indoor side surface 24 and the outdoor side surface 28 so that the heat insulation performance of the double window structure 10 is provided. It improves rather than preparing on one side.

  According to the double window structure 10 of the embodiment, tin oxide is mainly used on at least one of the indoor side surface 24 of the glass plate 22 of the outer window 16 and the outdoor side surface 28 of the glass plate 26 of the inner window 18. Since the low radiation film 30 is provided, the heat insulation performance can be improved as compared with the double window structure not provided with the low radiation film 30. Further, the low radiation film 30 mainly composed of tin oxide is less oxidized and has higher mechanical durability than the low radiation film mainly composed of silver, and therefore, the indoor side surface facing the air layer 20 communicating with the outside air. 24 or the outdoor side surface 28 is not oxidized nor easily damaged.

  In the double window structure 10 of the embodiment, as shown in FIG. 2, the glass plate 22 of the outer window 16 is a double glazing (double glazing for outer window) 32, and the glass plate 26 of the inner window 18 is also doubled. This is a layer glass (inner window multi-layer glass) 34. A low radiation film 30 is provided on the indoor side surface 24 of the indoor side glass plate 36 of the multilayer glass 32 and the outdoor side surface 28 of the outdoor side glass plate 38 of the multilayer glass 34.

  In addition, the outer window 16 of the double window structure 10 is a sliding window that is opened and closed with two multilayer glasses 32 and 32 supported by an upper frame 40 and a lower frame 42. The peripheral edge of the multi-layer glass 32 is sandwiched between metal ridges 46 via a resin glazing channel 44, and an upper ridge 48 constituting the ridge 46 is supported by the upper frame 40, thereby forming the ridge 46. A lower collar 50 is supported by the lower frame 42. In FIG. 1, a crescent for locking the two multilayer glasses 32, 32 is omitted.

  Like the outer window 16, the inner window 18 is a sliding window that is opened and closed with two multilayer glasses 34 and 34 supported by an upper frame 52 and a lower frame 54 as shown in FIG. 2. The peripheral edge of the multi-layer glass 34 is sandwiched by a metal collar 58 via a resin glazing channel 56, and an upper collar 60 constituting the collar 58 is supported by the upper frame 52 to constitute the collar 58. A lower collar 62 is supported by the lower frame 54. In FIG. 1, a crescent for locking the two multilayer glasses 34 is omitted.

  Hereinafter, although the structure of the multilayer glass 32 and 34 is demonstrated, since the multilayer glass 34 is the same as the structure of the multilayer glass 32, here the structure of the multilayer glass 32 is demonstrated and about the structure of the multilayer glass 34, Description is omitted.

  As shown in FIG. 2, the multi-layer glass 32 includes an outdoor side glass plate 64 and an indoor side glass plate 36 that are opposed to each other with a predetermined interval.

  The outdoor side glass plate 64 and the indoor side glass plate 36 are spaced apart via a spacer 68 so that an intermediate layer 66 is defined therebetween. The spacers 68 are arranged along the peripheral edge portions of the outdoor side glass plate 64 and the indoor side glass plate 36 so that the distance between the outdoor side glass plate 64 and the indoor side glass plate 36 is kept constant.

  The spacer 68 has a surface facing the outdoor side glass plate 64 and the indoor side glass plate 36 bonded to the outdoor side glass plate 64 and the indoor side glass plate 36 by a primary sealing material (not shown). Further, on the outer side of the spacer 68 (on the side opposite to the intermediate layer 66), a secondary groove (not shown) is filled in a concave groove formed between the outdoor glass plate 64 and the indoor glass plate 36. The The secondary sealing material is filled in contact with the primary sealing material. The intermediate sealing layer 66 defined between the outdoor side glass plate 64 and the indoor side glass plate 36 is shielded from the outside air by the primary sealing material and the secondary sealing material.

  The spacer 68 is formed in a hollow shape, and air holes 70 are formed at predetermined intervals along the longitudinal direction of the spacer 68 (direction perpendicular to the paper surface) on the inner surface (on the intermediate layer 66 side) of the spacer 68. Is provided. The vent hole 70 is penetrated through the hollow portion of the spacer 68, whereby the hollow portion and the intermediate layer 66 are communicated. Further, since the hollow portion of the spacer 68 is filled with a desiccant 72 such as granular zeolite, the air in the intermediate layer 66 is dried by the desiccant through the vent hole 70.

  As the spacer 68, a metal spacer mainly made of aluminum is used, but a hard resin spacer may be used.

  Further, 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.

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

  Although the above is the structure of the multilayer glass 32, it does not specifically limit about the kind of the outdoor side glass plate 64 and the indoor side glass plate 36 which comprise the multilayer glass 32. FIG. For example, both can be made of general soda lime glass, but at least one of them is heat-resistant and fire-resistant glass (for example, netted glass, heat-resistant tempered glass, low expansion tempered glass, transparent crystallized glass, etc.). As a result, the fireproof performance can be improved.

  In addition, although the multilayer glass 32 is a two-layer structure which consists of the outdoor side glass plate 64 and the indoor side glass plate 36, the multilayer glass comprised by three or more glass plates may be sufficient.

  Further, krypton gas, argon gas, or xenon gas may be sealed in the intermediate layer 66 of the multilayer glass 32. Since krypton gas, argon gas, and xenon gas have a lower thermal conductivity than air, the heat insulation performance is improved.

  FIG. 3 is an enlarged longitudinal sectional view showing a main part of the double window structure 10 shown in FIG.

  As described above, the double window structure 10 shown in FIGS. 2 and 3 has a form in which the glass plates 22 and 26 of both the outer window 16 and the inner window 18 are constituted by the double glazings 32 and 34. In the case of this double window structure 10, at least one of the indoor side surface 24 of the indoor side glass plate 36 of the multilayer glass 32 or the outdoor side surface 28 of the outdoor side glass plate 38 of the multilayer glass 34, If the low radiation film 30 mainly composed of tin oxide is provided, the heat insulation performance can be enhanced.

  Further, according to the double window structure 10, silver is applied to the indoor side surface 74 of the outdoor side glass plate 64 of the multilayer glass 32 and the outdoor side surface 78 of the indoor side glass plate 76 of the multilayer glass 34 as shown in FIG. A low emission film 80 as a main component is provided.

  Note that the surface on which the low radiation film 80 is provided is not limited to the indoor side surface 74 and the outdoor side surface 78, but may be provided on at least one of the indoor side surface 74 and the outdoor side surface 78. Further, a low radiation film 80 mainly composed of silver is provided on at least one of the outdoor side surface 82 of the indoor side glass plate 36 of the multilayer glass 32 or the indoor side surface 84 of the outdoor side glass plate 38 of the multilayer glass 34. You may prepare.

  The low radiation film 80 mainly composed of silver has higher heat ray reflection performance and higher heat shielding properties than the low radiation film 30 mainly composed of tin oxide. Therefore, by providing the low radiation film 80 mainly composed of silver on at least one of the surfaces 74, 78, 82, and 84 described above, the heat insulation performance can be further enhanced.

  Further, the low radiation film 80 mainly composed of silver is easy to oxidize and has low mechanical durability as compared with the low radiation film 30 mainly composed of tin oxide. Since it is provided on the surface side facing 66, the concern that it is easy to oxidize and has low mechanical durability can be solved.

  FIG. 4 is an enlarged longitudinal sectional view showing a main part of a double window structure 90 according to another embodiment of the present invention. In addition, the same code | symbol is attached | subjected and demonstrated about the same or similar member as the double window structure 10 shown in FIGS. 1-3.

  In the double window structure 90 shown in FIG. 4, the glass plate of the outer window 16 is a single plate glass (outer window single plate glass) 92, and the glass plate of the inner window 18 is a multi-layer glass 34. The low emission film 30 mainly composed of tin oxide is provided on the indoor side surface 94 of the single plate glass 92 and the outdoor side surface 28 of the outdoor side glass plate 38 of the multilayer glass 34. Note that the low radiation film 30 may be provided on at least one of the indoor side surface 94 and the outdoor side surface 28.

  Further, the double window structure 90 shown in FIG. 4 is provided with a low radiation film 80 mainly composed of silver on the outdoor side surface 78 of the indoor side glass plate 76 of the multilayer glass 34. The low radiation film 80 may be provided on the indoor side surface 84 of the outdoor glass plate 38 of the multilayer glass 34.

  With the above configuration, the double window structure 90 shown in FIG. 4 can also obtain the same effects as the double window structure 10 shown in FIGS.

  The double window structures 10 and 90 shown in FIGS. 1 to 4 are examples in which the present invention is applied to a sliding window, but the double window structure of the present invention is a fitting window or terrace window. It can also be applied to.

  Next, FIG. 3, FIG. 5, and FIG. 6 show the test double window structures in which the heat insulation performance test was performed based on the heat insulation performance test based on JIS A4710: 2004.

  The test double window structure of FIG. 3 is the double window structure 10 of the above-described embodiment.

  On the other hand, the double window structures 100 and 110 shown in FIGS. 5 and 6 are the double window structures of the first and second comparative examples, and the longitudinal sections of the main parts are shown.

  In the double window structure 100 of the first comparative example shown in FIG. 5, the outer window 16 is a double glazing 32 and the inner window 18 is also a double glazing 34. A low radiation film 80 mainly composed of silver is provided on the side surface 74 and the outdoor side surface 78 of the indoor side glass plate 76 of the multilayer glass 34.

  Further, in the double window structure 110 shown in FIG. 6, the outer window 16 is a double glazing 32, the inner window 18 is also a double glazing 34, an indoor side surface 74 of the outdoor glass plate 64 of the double glazing 32, and A low radiation film 80 mainly composed of silver is provided on the outdoor side surface 78 of the indoor side glass plate 76 of the multilayer glass 34. Further, the double window structure 110 has a low emission mainly composed of tin oxide on the outdoor side surface 82 of the indoor side glass plate 36 of the multilayer glass 32 and the indoor side surface 84 of the outdoor side glass plate 38 of the multilayer glass 34. A membrane 30 is provided.

  The double window structures 10, 100, and 110 shown in FIGS. 3, 5, and 6 are examples of the double window structure 10, and the double window structures 100 and 110 are comparative examples. Table 1 shows the size of the glass plate, the thickness of the glass plate, and the thickness of the air layer of the multi-layer glass that constitute the multi-layer glass 32 and 34 of each configuration. Moreover, the specifications of the low radiation films 30 and 80 are equal.

  Table 1 shows the conditions of the low radiation film used for the double window structures 10, 110, and 110.

As a result of conducting a heat insulation performance test on such double window structures 10, 100, and 110 based on the heat insulation performance test, the U value of the double window structure 10 in FIG. Whereas it was 0.82 (W / m ² · K), the double window structures 100 and 110 of the comparative examples both had U values of 0.92 (W / m ² · K).

  Therefore, it was found that the double window structure 10 shown in FIG. 3 has improved heat insulation performance as compared with the double window structures 100 and 110 of the comparative example.

  DESCRIPTION OF SYMBOLS 10 ... Double window structure, 12 ... Building, 14 ... Window opening, 16 ... Outer window, 18 ... Inner window, 20 ... Air layer, 22 ... Glass plate, 24 ... Indoor side surface, 26 ... Glass plate, 28 ... Outdoor side surface, 30 ... Low radiation film, 32 ... Multi-layer glass, 34 ... Multi-layer glass, 36 ... Indoor side glass plate, 38 ... Outdoor side glass plate, 40 ... Upper frame, 42 ... Lower frame, 44 ... Glazing Channel, 46 ... 框, 48 ... Upper, 50 ... Lower, 52 ... Upper, 54 ... Lower, 56 ... Grazing channel, 58 ... 框, 60 ... Upper, 62 ... Lower, 64 ... Outdoor glass Plate 66, intermediate layer 68, spacer 70, vent, 72 desiccant 74 74 indoor side surface 76 indoor side glass plate 78 outdoor side surface 80 low radiation film 82 82 outdoor side surface 84 ... indoor side surface, 90 ... double window structure, 92 ... single plate glass, 94 ... indoor side surface, 10 ... double window structure, 110 ... double window structure

Claims (5)

An outer window provided in the window opening of the building, and an air layer provided in the window opening and disposed on the indoor side of the building with respect to the outer window, and communicated with the outside air through the outer window In a double window structure with an inner window spaced through
A double window characterized in that a low radiation film mainly composed of tin oxide is provided on at least one of the indoor side surface of the glass plate of the outer window or the outdoor side surface of the glass plate of the inner window. Structure. The glass plate of the outer window is a double glazing glass for the outer window, the glass plate of the inner window is a double glazing glass for the inner window,
The low radiation film mainly composed of the tin oxide on at least one of the indoor side surface of the indoor side glass plate of the multilayer glass for outer window or the outdoor side surface of the outdoor side glass plate of the multilayer glass for inner window. The double window structure according to claim 1, further comprising:   The indoor side surface of the outdoor glass plate of the multilayer glass for outer window, the outdoor surface of the indoor glass plate of the multilayer glass for outer window, the outdoor surface of the indoor glass plate of the multilayer glass for inner window, or the The double window structure according to claim 2, wherein a low radiation film mainly composed of silver is provided on at least one of the indoor side surfaces of the outdoor side glass plate of the double glazing for the inner window. The glass plate of the outer window is a single plate glass for the outer window, the glass plate of the inner window is a double-layer glass for the inner window,
The low radiation film mainly composed of the tin oxide is provided on at least one of the indoor side surface of the single glass for the outer window or the outdoor side surface of the outdoor glass plate of the multilayer glass for the inner window. Item 2. The double window structure according to Item 1.   A low radiation film mainly composed of silver is provided on at least one of the outdoor side surface of the indoor side glass plate of the double-glazed glass for the inner window or the indoor side surface of the outdoor side glass plate of the double-sided glass for the inner window. The double window structure according to claim 4.

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