JP2016056063A - Multilayer glass for building window - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide multilayer glass for building windows, which can solve such a questionable point that the inside dew condensation prevention performance of the multilayer glass is deteriorated or the multilayer glass is broken due to the internal pressure fluctuations in the multilayer glass.SOLUTION: The multilayer glass for building windows is constituted so that a first glass sheet to be positioned on the outdoor side when a window part of a building is fit with the multilayer glass, a second glass sheet to be positioned on the indoor side, and at least n pieces of intermediate glass sheets to be positioned between the first glass sheet and the second glass sheet are arranged at regular intervals and the peripheral part of the first glass sheet, that of the second glass sheet, and those of the intermediate glass sheets are sealed by using a seal material. When the thickness A of (n+1) hollow layers to be partitioned/formed by the first glass sheet, the at least n pieces of intermediate glass sheets and the second glass sheet is defined as Am (in which m is 1 to (n+1) and n is an integer) as it goes from the first glass sheet to the second glass sheet, the thickness Aof the outermost-side hollow layer is made thinner than that Aof the innermost-side hollow layer.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a multilayer glass for building windows provided with a plurality of glass plates.

Double-glazed glass with two glass plates separated by a spacer and formed with a hollow layer has excellent heat insulation and soundproofing properties, and is widely used for houses and windows for various other buildings. doing.
Also, Patent Document 1 discloses a double-glazed glass in which two glass layers are separated from each other via a spacer to form a two-layered hollow layer and have improved heat insulation performance and sound insulation performance. Yes.
Hereinafter, a multilayer hollow in which two or more hollow layers are formed by separating at least one intermediate plate (for example, a glass plate) between two glass plates and two glass plates via a spacer, respectively. Multi-layer glass having layers is referred to herein as multilayer glass.
As shown in FIG. 7, the multi-layer glass using three glass plates in Patent Document 1 and having two hollow layers is prepared with three glass plates 100, 101, and 102 in the vertical and horizontal dimensions. The spacers 120 and 121 containing the desiccant 115 are arranged so that the hollow layers 110 and 111 are formed at the peripheral portions of the respective glass plates, and between the glass plates 100, 101 and 102 and the spacers 120 and 121. A primary sealing material 130, 131 such as butyl rubber is formed by coating, and a polysulfide-based adhesive, a silicone-based adhesive, or the like is formed in a groove between the end portions of the glass plates 100, 101, 102 outside the spacers 120, 121. The secondary sealing materials 140 and 141 are filled, cured, and sealed. In the multilayer glass of Patent Document 1, the thickness of the two glass plates 100 and 102 on both sides and the thickness of the two hollow layers 110 and 111 are determined from the inside glass plate 101. It is described that it is preferable to have a configuration that is equally symmetric.

In multi-layer glass, heat insulation performance is improved by forming two or more hollow layers, but the thickness of the plurality of hollow layers is the same as described in Patent Document 1. Is common. This is because the heat insulation performance is best when the thickness of the hollow layer is the same.
On the other hand, regarding the pressure in the hollow layer with respect to the temperature change of the multilayer glass (hereinafter referred to as internal pressure), the multilayer glass having one thick hollow layer corresponding to the total thickness of two or more hollow layers. Shows the same behavior. For example, a multilayer glass having a configuration of a 3 mm thick indoor glass plate, a 12 mm thick first hollow layer, a 3 mm thick intermediate glass plate, a 12 mm thick second hollow layer, and a 3 mm thick outdoor glass plate, It is known that double-glazed glass having a configuration of a 3 mm thick indoor side glass plate, a 24 mm thick hollow layer, and a 3 mm thick outdoor side glass plate has the same behavior with respect to a pressure change in the hollow layer with respect to a temperature change. Yes.

As shown in FIG. 6A, a single hollow layer 23 (for example, thickness: L) formed by separating two glass plates 20 and 21 via a spacer 22 to form a hollow layer 23. : 12 mm), and primary sealing materials 24 and 24 such as butyl rubber are formed between the glass plates 20 and 21 and the spacer 22 by coating, and the ends of the glass plates 20 and 21 outside the spacer 22 In the multi-layer glass formed by filling and sealing the secondary sealing materials 25 and 25 such as polysulfide adhesives and silicone adhesives in the groove portions between the portions, the internal pressure of the hollow layer 23 increases due to temperature rise or the like. 6 (a), the glass plates 20 and 21 on both sides of the hollow layer bend as shown by the dotted lines, and the primary sealing materials 24 and 24 and the secondary sealing materials 25 and 25 A tensile load is applied evenly. On the other hand, as shown in FIG. 6- (b), there are two hollow layers 23a and 23b, and the thicknesses of these hollow layers 23a and 23b (for example, thickness: М: 12 mm) are the same. In the case of multilayer glass, the intermediate glass plate 26 does not bend and only the outer glass plates 20 and 21 are deformed, and the tensile load applied to the primary sealing materials 24 and 24 and the secondary sealing materials 25 and 25 is also outside. It concentrates only on the adhesive surface of the glass plates 20 and 21 side. Therefore, in the case of multilayer glass, the load on the secondary sealing material due to the increase in the internal pressure of the hollow layer and the load on the glass plate on the outer surface due to the decrease in the internal pressure increase, which may lead to internal condensation of the hollow layer and glass damage.
Note that the multilayer glass shown in FIG. 6- (b) has a total thickness of the hollow layers of 24 mm, and thus has a single-layered hollow layer having N of 24 mm as shown in FIG. 6- (c). It will show the same behavior as glass, and the amount of deformation y of the multilayer glass shown in FIG. 6- (b) is about twice the amount of bending deformation x of the multilayer glass shown in FIG. 6- (a). Become.

JP 2010-6684 A

  An object of the present invention is to provide a highly durable multilayer glass for building windows that can solve the problems of deterioration of the internal dew condensation prevention performance of the multilayer glass due to fluctuations in internal pressure in the multilayer glass and glass breakage.

As a result of intensive studies to solve the above problems, the present inventor has arrived at the present invention, and provides the following multilayer glass for building windows.
(1) When the multi-layer glass is constructed on the window of the building, the first glass plate located on the outdoor side, the second glass plate located on the indoor side, the first glass plate and the second glass plate At least n (where n is an integer greater than or equal to 1) intermediate plates are disposed between the glass plates, and the first glass plate, the second glass plate, and the intermediate glass plate In a multi-layer glass for a building window formed by sealing a peripheral edge with a sealing material, a partition is formed by at least n intermediate plates arranged separately between a first glass plate and a second glass plate. The thickness (A) of the (n + 1) hollow layers is set to Am (where m is 1 to (n + 1)) from the outdoor first glass plate to the indoor second glass plate. the time, it was thinner than the thickness a of the most outdoor side most interior side of the hollow layer thickness a ₁ of the hollow layer _{(n + 1)} Building window for multi-layer glass which is characterized.

(2) The two-layered section formed by one intermediate plate arranged to be spaced between the first glass plate located on the outdoor side and the second glass plate located on the indoor side. When the thickness A of the hollow layer is Am _X (where _X is an integer of 1 to 2) from the first glass plate on the outdoor side toward the second glass plate on the indoor side, Am ₁ The multilayer glass for building windows according to (1) above, wherein the relationship with Am ₂ is Am ₁ <Am ₂ .
(3) A three-layered section formed by two intermediate plates arranged to be spaced between the first glass plate located on the outdoor side and the second glass plate located on the indoor side. When the thickness A of the hollow layer is Am _Y (where _Y is an integer of 1 to 3) from the first glass plate on the outdoor side toward the second glass plate on the indoor side, at least Am ₁ the relationship between the Am _{3 and,} Am 1 <building window multilayer glass according to the above (1), characterized in that the Am _3.

(4) Three layers of layers formed by two intermediate plates arranged to be spaced between the first glass plate located on the outdoor side and the second glass plate located on the indoor side. When the thickness A of the hollow layer is Am _Y from the first glass plate on the outdoor side toward the second glass plate on the indoor side, the relationship between Am ₁ , Am _2, and Am ₃ is expressed as Am ₁ <Am above, wherein in that the ₂ ≦ Am ₃ (1) or (3) building window multilayer glass according to.
(5) Four layers of layers formed by three intermediate plates arranged to be spaced between the first glass plate located on the outdoor side and the second glass plate located on the indoor side. When the thickness A of the hollow layer is Am _Z (where _Z is an integer of 1 to 4) from the first glass plate on the outdoor side toward the second glass plate on the indoor side, at least Am ₁ The multilayer glass for building windows according to the above (1), wherein Am ₁ <Am ₄ is set as the relationship between Am and Am ₄ .

(6) A four-layered section formed by three intermediate plates arranged to be spaced between the first glass plate located on the outdoor side and the second glass plate located on the indoor side. When the thickness A of the hollow layer is Am _Z from the first glass plate on the outdoor side toward the second glass plate on the indoor side, the relationship between Am ₁ , Am ₂ , Am ₃ and Am ₄ is expressed as Am ₁ <Am ₂ ≦ Am ₃ ≦ Am _{4 The} multilayer glass for building windows according to (1) or (5) above, wherein
(7) Thickness A ₁ on the most outdoor side of the hollow layer described above is, building window multilayer glass according to any one of the above (1), wherein the (6) that is 6Mm～18mm.
(8) It is partitioned and formed by at least n intermediate plates arranged to be spaced between the first glass plate positioned on the outdoor side and the second glass plate positioned on the indoor side (n + 1). ) The thickness A of the hollow layer of the layer is set to Am (where m is 1 to (n + 1) and n is an integer) from the first glass plate on the outdoor side toward the second glass plate on the indoor side. The difference between the thickness A ₁ of the hollow layer and the thickness A _{(n + 1)} of the most indoor hollow layer is within 4 mm, according to any one of (1) to (7), Multi-layer glass for building windows.
In addition, the plate | board thickness of the glass plate shown by this specification shall be interpreted according to the thickness and the standard | standard of its tolerance which are prescribed | regulated by the Japanese industrial standard regarding glass, and its standard. For example, a float plate glass having a plate thickness of 3 mm means a plate thickness of 3.0 mm (plate thickness) ± 0.3 mm (allowable value), and a float plate glass having a plate thickness of 4 mm is 4.0 mm (plate thickness). It refers to a plate thickness of ± 0.3 mm (allowable value).

According to the multilayer glass of the present invention, the thickness of the outdoor hollow layer is at least thinner than the thickness of the indoor hollow layer adjacent to the outdoor hollow layer. It is possible to reduce the deformation of the convex bulge and the concave dent of the first glass plate located on the outdoor side and the second glass plate located on the indoor side. As a result, the load on the secondary seal due to fluctuations in the internal pressure is reduced, internal condensation of the hollow layer and glass breakage can be reduced, and durability can be improved.

The partial cross section schematic perspective view of the multilayer glass which concerns on this invention. 1 is a partially omitted schematic cross-sectional view of a multilayer glass according to an embodiment of the present invention. The partial omission schematic sectional drawing of the multilayer glass concerning other embodiment of this invention. The partial omission schematic sectional drawing of the multilayer glass concerning other embodiment of this invention. The partial omission schematic sectional drawing of the multilayer glass concerning other embodiment of this invention. The reference drawing for demonstrating the multilayer glass of this invention. The partially cut-away cross-sectional view of the triple-type multi-layer glass of the conventional example.

The multilayer glass of the present invention will be specifically described based on the drawings of FIGS. The drawings illustrate preferred embodiments of the invention, and the invention is not limited to the drawings and description thereof.
FIG. 1 is a partial cross-sectional schematic perspective view of a multilayer glass according to the present invention, in which 1 is a multilayer glass, and 2 is positioned on the outdoor side when the multilayer glass is applied to a window of a building. The first glass plate 3 is a second glass plate located on the indoor side when a multilayer glass is similarly applied to a window of a building, and 4 is a first glass plate 2 and a second glass. An intermediate plate disposed between the plates 3 so as to be spaced from the glass plate, 5 is a hollow layer, 6 is a spacer, 7 is a primary seal, and 8 is a secondary seal.

2 and 5, the first glass plate 2 and the second glass plate 3 are spaced apart, and the first glass plate 2 and the one intermediate plate 4 (that is, n = 1) described above and Triple type multi-layer glass (two hollow layers 5-1 and 5-2 comprising two glass plates arranged between the second glass plate 3 and one intermediate plate in total). 3 is an example of a cross section of the lower side portion of the multi-layer glass (in FIG. 1, a cross-sectional view taken along line XX in a portion corresponding to a circle A. The same applies to FIGS. 3 to 5). 1 between the first glass plate 2 and the second glass plate 3, and the two intermediate plates 4-1 and 4-2 between the first glass plate 2 and the second glass plate 3. A quadruple type multi-layer glass (three hollow layers 5-1, 5-2, 5) having a total of four glass plates (ie, n = 2) and two intermediate plates arranged in a single layer. -3 4 shows an example of a cross-section of the lower side of FIG. 4, and FIG. 4 separates the first glass plate 2 and the second glass plate 3, and three intermediate plates 4-1, 4-2 and 4-3 are arranged between the first glass plate 2 and the second glass plate 3 described above, that is, two (that is, n = 3) glass plates and three intermediate plates Is an example of a cross section of the lower side portion of a five-fold type multi-layer glass (a multi-layer glass having four hollow layers 5-1, 5-2, 5-3, 5-4) .
2 to 5, when multilayer glass is applied to an opening such as a window of a building, the left side represents the outdoor side and the right side represents the indoor side as illustrated.
The example of FIGS. 2 to 5 shows a triple type multi-layer glass to a five-fold type multi-layer glass in which one to three intermediate plates are arranged between the first glass plate 2 and the second glass plate 3. Although glass is shown, four or more intermediate plates disposed between the first glass plate 2 and the second glass plate 3 may be used, and a multi-type multilayer glass may be used.

In the multilayer glass of the present invention, the thickness of the (n + 1) layers of hollow layers defined by at least n intermediate plates arranged to be spaced between the first glass plate and the second glass plate. When A is Am (where m is 1 to (n + 1) and n is an integer) from the first glass plate on the outdoor side toward the second glass plate on the indoor side, the most thin in the thickness a ₁ of the hollow layer. That constitutes the most outdoor side of the hollow layer most interior side of the hollow layer thickness A ₁ thick A _{(n + 1)} thinner.
In the example shown in FIG. 2, the thickness (layer thickness) of the hollow layer 5-1 formed between the first glass plate 2 and the intermediate plate 4 on the outdoor side is A ₁ , and the intermediate plate 4 and the indoor side When the thickness of the hollow layer 5-2 formed between the second glass plate 3 and the second glass plate 3 is A ₂ , the multilayer glass has A ₁ <A ₂ . That is, assuming that Am _X (where _X is an integer of 1 to 2) sequentially from the outdoor first glass plate to the indoor second glass plate, the thickness A ₁ , A of the hollow layer The relationship of ₂ is A ₁ <A ₂ .
For example, the thickness of _{A 1} is preferably in the range of 6～18Mm, the thickness of the _{A 2 satisfies} the relation of A 1 _{<A 2,} and the range of 10~18mm is preferred.

In the example shown in FIG. 3, the thickness of the hollow layer 5-1 formed between the outdoor first glass plate 2 and the intermediate plate 4-1 is A ₁ , and the intermediate plate 4-1 and the intermediate plate 4. the thickness of the hollow layer 5-2 formed between -2 a _2, the thickness of the hollow layer 5-3 formed between the second glass plate 3 of the middle plate 4-2 and the indoor side when the a _3, a multi-layer glass was _a 1 <a _3. That is, assuming that Am _Y (where _Y is an integer of 1 to 3) sequentially from the outdoor first glass plate to the indoor second glass plate, the thickness of the hollow layer A ₁ , A relationship _{2, a 3 has} a _a 1 <a _3.
For example, the thickness of _{A 1} is preferably in the range of 6～18Mm, the thickness of the _{A 3 satisfies} the relationship of A 1 _{<A 3,} and the range of 10~18mm is preferred.
In this case, the relationship among the thicknesses A ₁ , A ₂ , and A ₃ of each hollow layer is particularly preferably A ₁ <A ₂ ≦ A ₃ .

In the example shown in FIG. 4, the thickness of the hollow layer 5-1 formed between the first glass plate 2 on the outdoor side and the intermediate plate 4-1 is A ₁ , and the intermediate plate 4-1 and the intermediate plate 4 are used. the thickness of the hollow layer 5-2 formed between -2 _{a 2,} the thickness of the hollow layer 5-3 formed between the intermediate plate 4-2 and the intermediate plate 4-3 _{a 3,} intermediate when the thickness of the hollow layer 5-4 formed between the second glass plate 3 plate 4-3 and the indoor side and the a _4, a multi-layer glass was a 1 _{<a 4.} That is, assuming that Am _Z (where _Z is an integer of 1 to 4) sequentially from the outdoor first glass plate to the indoor second glass plate, the thickness A ₁ , A of the hollow layer relationship _{2, a} 3, _{a 4 is} a _a 1 <a _4.
For example, the thickness of _{A 1} is preferably in the range of 6～18Mm, the thickness of _{A 4 may} satisfy the relation of A 1 _{<A 4,} and a range of 10~18mm is preferred.
In this case, the relationship among the thicknesses A ₁ , A ₂ , A _{3, and} A ₄ of each hollow layer is particularly preferably Am ₁ <Am ₂ ≦ Am ₃ ≦ Am ₄ .

In addition, (n + 1) layers of compartments are formed by at least n intermediate plates arranged to be spaced between the first glass plate located on the outdoor side and the second glass plate located on the indoor side. When the thickness A of the hollow layer is Am (where m is 1 to (n + 1) and n is an integer) from the outdoor first glass plate to the indoor second glass plate, The difference between the thickness A ₁ of the hollow layer and the thickness A _{(n + 1)} of the most indoor hollow layer is preferably within 4 mm. By doing in this way, the amount of bending deformation of the first glass plate on the outdoor side and the second glass plate on the indoor side of the multi-layer glass due to fluctuations in internal pressure in the multi-layer glass can be reduced, and more favorable as the multi-layer glass. A heat transmissibility can be obtained.

  The shape and thickness of the first glass plate 2 and the second glass plate 3 constituting the multilayer glass described above are appropriately selected according to the shape and dimensions of the target multilayer glass. When used for other building windows, the glass plate is generally a rectangular flat plate, and the thickness of each plate is in the range of a nominal thickness of 3 mm to 10 mm. The rectangular dimensions of the second and second glass plates 3 are preferably the same or substantially the same. Moreover, the 1st glass plate 2 and the 2nd glass plate 3 may differ in plate | board thickness, and may be a glass plate from which a kind differs. The types of glass plates are usually float glass plates, ordinary glass plates, heat ray absorbing glass plates, ultraviolet ray absorbing glass plates, heat ray reflecting glass plates, low radiation glass plates (Low-E glass) used for construction. Plate), template glass, laminated glass, glass plate with wire / mesh, double-strength glass, tempered glass, and a glass plate in which these functions are combined, and can be appropriately selected and used according to the required required specifications.

  In the multi-layer glass of the present invention, an intermediate disposed between the first glass plate 2 and the second glass plate 3 and spaced apart from the glass plates 2 and 3 and in parallel with the glass plates 2 and 3. The plate 4 is arranged in order to reduce the gas convection in the space between the first glass plate 2 and the second glass plate 3 and to improve the heat insulation.

  As the intermediate plate 4, a glass plate, a plastic plate, or the like can be used. The intermediate plate 4 may be a transparent plate, a colored transparent plate, a patterned plate, a coated transparent plate on which a functional coating is formed, or a combination of these. As an intermediate | middle board, the board according to the place arrange | positioned, a site | part, designability, etc. is used, and a glass plate is preferable. As a glass plate to be used, since it arrange | positions between the 1st glass plate 2 and the 2nd glass plate 3, the whole thickness can be made thin and the glass plate whose plate | board thickness is 2.0 mm or less can be used. For example, it is possible to use a glass plate having a thin plate thickness of 0.4 mm or more and 2.0 mm or less, more preferably about 0.7 mm to 1.6 mm.

  Further, as the intermediate plate, a chemically strengthened glass plate having sufficient strength even if the plate thickness is reduced can be used. The chemically strengthened glass plate is obtained by immersing a glass plate containing a Na component or Li component such as soda lime silicate glass in a molten salt such as potassium nitrate, and / or Na ions having a small atomic diameter present on the surface of the glass plate and / or A glass plate manufactured using a strengthening technique that replaces Li ions and K ions having a large atomic diameter present in the molten salt to form a compressive stress layer on the surface layer of the glass plate to increase the strength. is there.

The first glass plate 2 and the intermediate plate, the second glass plate 3 and the intermediate plate, and the spacers 6 arranged so as to form the hollow layer 5 are separated from each other. Aluminum spacers and synthetic resin spacers that are used can be used. A groove portion 9 as shown in FIG. 2 is preferably provided on the inner surface portion 6 of the spacer 6 on the hollow layer 5 side. The groove portion 9 is formed so as to allow air to pass between the space portion of the spacer 6 and the hollow layer 5, and is hollowed by a desiccant (for example, silica gel) filled in the space portion of the spacer 6 through the air hole of the groove portion 9. The dry state of the layer can be maintained and condensation can be prevented. A similar structure is also adopted in the spacer 6 shown in FIGS.
When the first glass plate 2, the second glass plate 3, and the intermediate plate are rectangular, the plurality of glass plates have four sides (that is, the lower side, the left side, the right side, and the upper side). In the corners of the four corners where the spacers 6 on the lower side, the left side, the right side, and the upper side are abutted, corner keys are inserted and the spacers 6 are separated. Are concatenated.
Further, the hollow layer of the multilayer glass of the present invention is filled with dry air or an enclosed gas of an inert gas (argon gas, krypton gas, etc.), so that the heat insulation is improved.

In the multilayer glass of the present invention, the peripheral portions of the first glass plate 2, the second glass plate 3, and the intermediate glass plate 4 are sealed with a sealing material. In general, it is preferable that the sealing material has a function shared by the primary sealing material and the secondary sealing material.
More specifically, the sealing is primarily performed on the side surfaces of the first glass plate 2 and the spacer 6, the side surfaces of the intermediate glass plate 4 and the spacer 6, and the side surfaces of the second glass plate 3 and the spacer 6. Sealing material 7 is used. As the primary sealing material 7, an adhesive material that provides excellent moisture permeation prevention, durability, sealing property, good adhesion surface, coating workability, etc. between the glass plate and the side part of the spacer portion. Selected. For example, a butyl rubber sealing material can be preferably used.

Moreover, it is a peripheral part of the 1st glass plate 2 and the 2nd glass plate 3, Comprising: A secondary sealing material is used for the seal | sticker between the 1st glass plate 2 and the 2nd glass plate 3 of the outer side of the spacer 6. Is used. As the secondary sealing material, a sealing material that provides sufficient sealing properties, airtightness, durability, filling workability, and the like is selected. For example, a polysulfide type sealing material, a silicone type sealing material, etc. can be used preferably.
In addition, as shown in FIGS. 2-4, a secondary sealing material is a peripheral part between the 1st glass plate 2 and an intermediate board, a peripheral part between a 2nd glass plate and an intermediate board, Moreover, you may make it each provide separately in the peripheral part between intermediate plates, and you may make it cover the edge part of an intermediate plate with a secondary sealing material like FIG. If it does in this way, breakage of the end of an intermediate board can be prevented and durability of multilayer glass can be improved.

  According to the multilayer glass of the present invention, the load of the secondary seal due to the internal pressure fluctuation of the hollow layer of the multilayer glass is reduced, and internal condensation and glass breakage of the hollow layer can be reduced. It is useful for residential and other architectural windows.

1: multi-layer glass, 2: first glass plate on the outdoor side, 3: first glass plate on the indoor side, 4: intermediate plate, 5: hollow layer, 6: spacer, 7: primary sealing material, 8: two Next sealing material, 9: Groove

Claims (8)

When constructing the multi-layer glass on the window portion of the building, the first glass plate located on the outdoor side, the second glass plate located on the indoor side, the first glass plate and the second glass plate, At least n (where n is an integer equal to or greater than 1) intermediate plates are arranged separately from each other, and the peripheral edges of the first glass plate, the second glass plate, and the intermediate glass plate are sealed. In a multi-layer glass for a building window sealed with a material, it is partitioned and formed by at least n intermediate plates arranged separately between a first glass plate and a second glass plate (n + 1). ) When the thickness A of the hollow layer of the layer is set to Am (where m is 1 to (n + 1)) from the first glass plate on the outdoor side toward the second glass plate on the indoor side. and characterized in that thinner than the thickness a of the outdoor side most interior side of the hollow layer thickness a ₁ of the hollow layer _{(n + 1)} That building window for multilayer glass. A hollow layer of two layers that is partitioned by a single intermediate plate that is spaced from the first glass plate located on the outdoor side and the second glass plate located on the indoor side. When the thickness A is Am _X (where _X is an integer of 1 to 2) from the outdoor first glass plate to the indoor second glass plate, Am ₁ and Am ₂ The multilayer glass for building windows according to claim 1, wherein the relationship of Am ₁ <Am ₂ is satisfied. The three-layer hollow layer defined by the two intermediate plates arranged to be spaced between the first glass plate located on the outdoor side and the second glass plate located on the indoor side. When the thickness A is Am _Y (where _Y is an integer of 1 to 3) from the first glass plate on the outdoor side toward the second glass plate on the indoor side, at least Am ₁ and Am ₃ The multilayer glass for building windows according to claim ₁ , wherein Am ₁ <Am ₃ . The three-layer hollow layer defined by the two intermediate plates arranged to be spaced between the first glass plate located on the outdoor side and the second glass plate located on the indoor side. When the thickness A is Am _Y from the first glass plate on the outdoor side toward the second glass plate on the indoor side, the relationship between Am ₁ , Am _2, and Am ₃ is Am ₁ <Am ₂ ≦ Am _The multi-layer glass for building windows according to claim 1 or 3, wherein the multi-layer glass is 3. The four-layer hollow layer defined by the three intermediate plates arranged to be spaced between the first glass plate located on the outdoor side and the second glass plate located on the indoor side. When the thickness A is Am _Z (where _Z is an integer of 1 to 4) from the first glass plate on the outdoor side toward the second glass plate on the indoor side, at least Am ₁ and Am ₄ The multilayer glass for building windows according to claim ₁ , wherein Am ₁ <Am ₄ is established. The four-layer hollow layer defined by the three intermediate plates arranged to be spaced between the first glass plate located on the outdoor side and the second glass plate located on the indoor side. When the thickness A is Am _Z from the first glass plate on the outdoor side toward the second glass plate on the indoor side, the relationship between Am ₁ , Am ₂ , Am ₃ and Am ₄ is expressed as Am ₁ <Am _The multilayer glass for building windows according to claim 1, wherein ₂ ≦ Am ₃ ≦ Am ₄ . The thickness A ₁ of the hollow layer most outdoor side of the can, building window multilayer glass according to claim 1, characterized in that the 6Mm～18mm. (N + 1) layers of compartments formed by at least n intermediate plates arranged to be spaced between the first glass plate located on the outdoor side and the second glass plate located on the indoor side. When the thickness A of the hollow layer is Am (where m is 1 to (n + 1) and n is an integer) from the outdoor first glass plate to the indoor second glass plate, The difference between the thickness A ₁ of the hollow layer and the thickness A _{(n + 1)} of the most indoor hollow layer is 4 mm or less, for a building window according to any one of claims 1 to 7 Multi-layer glass.

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