JP2003321256A - Double glass structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a double glass structure having a high sound-insulating property. <P>SOLUTION: Two transparent glass plates 1 and 2 are fixed using frames (not shown), or the like, while leaving a space between them. A plurality of viscoelastic supports 3 are arranged inside the space in a scattered manner, in contact with the two transparent glass plates 1 and 2. The viscoelastic supports 3 are cylindrical with a diameter of a few mm and are made of a material such as a molded butyl material, a foamed rubber material or silicon gel. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double glazing structure that can be used for windows and the like.

[0002]

2. Description of the Related Art A double-glazed window has a structure in which two glass plates are fixed in parallel with each other so as to be spaced apart from each other in parallel with each other, and is known to have excellent heat insulating properties. . However, the performance required for a window is sound insulation as well as heat insulation.

[0003]

Double glazing windows generally have sound insulation properties as shown in FIG. In this sound insulation characteristic, the figure shows a drop in performance due to resonance transmission (drum sound is generated) of the double glass structure, and the figure shows glass coincidence (a certain frequency range in the mass law). Shows that the transmission loss is lower than the mass law).

[0004] Further, there is a device intended to enhance heat insulation and sound insulation by making a vacuum between two glass plates in a double-glazed window. In the above, a hard spacer is required to prevent the glass plate from being crushed, and since this spacer acts as a sound bridge, the actual improvement in sound insulation performance cannot be expected.

In view of the above circumstances, it is an object of the present invention to provide a double glass structure having high sound insulation.

[0006]

In order to solve the above-mentioned problems, the double glass structure of the present invention is a double glass structure in which two glass plates are separated from each other and fixed in a state in which a space is secured. In the structure, the viscoelastic support is present in a dot shape or a linear shape in contact with the two glass plates in the space.

In the above structure, since it is the viscoelastic support that exists in contact with the two glass plates in the space, it does not act as a sound bridge unlike a hard spacer. That is, the viscoelastic support supports the glass plate not as a sound bridge but as a vibration damper.
Then, this prevents performance deterioration due to coincidence. Furthermore, the presence of the viscoelastic support, which is a foreign substance other than air in the space, makes it difficult for simple sound transmission to occur, so that at least the performance level as a single plate can be secured even in the resonance transmission frequency range. In the frequency range other than the resonance transmission frequency, the vibration transmission loss can be obtained due to the viscosity and elasticity of the viscoelastic support.

The viscoelastic support may be made of a colorless transparent material. On the other hand, the viscoelastic support may be made of a colored material.

The viscoelastic support preferably has a heat insulating property equal to or higher than that of air. The viscoelastic support may be a combination of a viscoelastic body and a heat insulating member. Even when the viscoelastic body is somewhat inferior in heat insulation, by combining it with a heat insulation member, it becomes possible to secure high heat insulation as a viscoelastic support. Further, it is preferable that the space is hermetically closed.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The double glass structure of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, in the double glass structure of the first embodiment, two transparent glass plates 1 and 2 are fixed by a frame member or the like (not shown) in a state in which a space is secured by separating them from each other. In the space, two transparent glass plates 1 and 2 are
It has a structure in which a plurality of viscoelastic supports 3 are present in contact with each other in a dot shape. The viscoelastic support 3 has a cylindrical shape, and the diameter thereof is, for example, about several millimeters. Good. Further, the viscoelastic support 3 is
It is made of materials such as molded butyl material, foam rubber material, and silicon gel. Although the arrangement pitch of the viscoelastic supports 3 is constant in this figure, it is not limited to the constant pitch. Further, the pitch to be set depends on the physical properties of the viscoelastic support 3 (viscosity, loss coefficient, spring constant, etc.) and the glass plate (material, thickness, etc.) used, but the aim is to achieve sound insulation. This is an improvement, and concrete values of the physical properties of the viscoelastic support 3 can be obtained by experiments or simulations.

FIG. 2 shows a double glazing structure of the second embodiment. This double glass structure has two transparent glass plates 1,
2 are fixed to each other by a frame member or the like (not shown) in a state where they are separated from each other and a space is secured, and a plurality of linear viscoelastic supports 4 are present in contact with the two transparent glass plates 1 and 2 in the space. It has a different structure. The width of the linear viscoelastic support 4 is set to, for example, about several millimeters, but may be set to a size that does not cause the glass plates 1 and 2 to vibrate as a unit, or may be changed according to the characteristics. Further, although not shown, the viscoelastic support 4 may be provided in a vertical or horizontal crossing line shape, a wavy shape, or the like. Further, the dot-shaped viscoelastic support 3 and the linear viscoelastic support 4 may be mixed.

In these structures, it is the viscoelastic support 3 that is in contact with the two glass plates 1 and 2 in the space.
Since it is (4), it does not act as a sound bridge unlike the hard spacer described in the conventional example. That is, regarding one glass plate 1 (2), the viscoelastic support 3 (4) supports the glass plate 1 (2) not as a sound bridge but as a vibration damper. As a result, performance deterioration due to coincidence can be avoided. Although it is less effective than damping the entire surface, the performance is improved by originally making it double from the single plate, so if you consider the total, sufficient performance can be achieved even if there is a slight drop in coincidence. Furthermore, the viscoelastic support 3 which becomes a foreign substance other than air in the space
Since the presence of (4) makes it difficult for simple sound transmission to occur, at least the performance level as a single plate can be secured even in the resonance transmission frequency range, and viscoelastic support is provided in the frequency range other than the resonance transmission frequency. Vibration transmission loss can be obtained due to the viscosity and elasticity of the body 3 (4).

Considering the predetermined range of the viscoelastic support 3 (4) at a certain location and the two glass plates 1 and 2 connected thereto, the spring constant of the viscoelastic support 3 (4) and the predetermined range described above. There is a natural frequency of a two-mass system that is determined by the glass weight of. Even if the natural frequencies to be present in plural in one double glass structure are varied or unified, it is preferable to make them different from the resonance transmission frequency by the air spring in the space. In this case, the performance deterioration due to the resonance transmission of the double glass structure will be further reduced.

When the double glass structure is used as, for example, a window glass of a general house, it is considered that it is preferable to use the viscoelastic support 3 (4) as a colorless and transparent material because it is comfortable to use. On the other hand, it is possible to use a colored viscoelastic support 3 (4). In this case, the arrangement form of the viscoelastic support 3 (4) becomes a pattern in the double glass structure, which causes designability, and the double glass structure is used as an entrance door (automatic door, etc.) of a store, for example. It is suitable for such cases. It is also possible to draw letters and pictures with a combination of colored dots and linear viscoelastic supports 3 (4). If the viscoelastic support 3 (4) contains a light-storing material, the design will be exhibited even at night.

The viscoelastic support 3 (4) preferably has a heat insulation property equal to or higher than that of air. According to this, it is possible to secure the heat insulation property equal to or higher than that of the space having only the normal air. The viscoelastic support 3 (4) may be a combination of a viscoelastic body 11 and a heat insulating member 12, as shown in FIG. Even if the viscoelastic body 11 is slightly inferior in heat insulation, by combining it with the heat insulation member 12, the viscoelastic support 3
As for (4), it becomes possible to secure high heat insulation.

In the structure in which the space between the glass plates 1 and 2 is closed, it is possible to use a viscoelastic support 3 (4) containing a relatively large amount of water (gel-like material). . Since there is no air circulation with the outside world in a closed space, it is possible to maintain a constant humidity condition in the space,
Moisture desorption of the viscoelastic support 3 (4) is prevented, and its viscosity / elasticity is maintained.

[0018]

As described above, according to the present invention, deterioration of performance due to resonance transmission of double glass structure and deterioration of performance due to coincidence of glass plate (single plate) are reduced to secure high sound insulation. It becomes possible to do.
Further, the impact absorption capability of the viscoelastic support also improves the crack resistance. If a colored viscoelastic support is used, it is possible to give the double glass structure a design.

[Brief description of drawings]

FIG. 1 is a perspective view showing a double glazing structure according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a double glazing structure according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of a double glass structure using a viscoelastic support body composed of a viscoelastic body and a heat insulating member.

FIG. 4 is a graph showing sound insulation characteristics in a general double glass structure.

[Explanation of symbols]

1 glass plate 2 glass plates 3 Viscoelastic support 4 Viscoelastic support 11 Viscoelastic body 12 Thermal insulation member

Claims (6)

[Claims] 1. In a double glass structure in which two glass plates are separated from each other and fixed in a state where a space is secured, the viscoelastic support is in contact with the two glass plates in the space and has a dot shape. Or, a double glass structure characterized by existing linearly. 2. The double glazing structure according to claim 1, wherein the viscoelastic support is made of a colorless transparent material. 3. The double glazing structure according to claim 1, wherein the viscoelastic support is made of a colored material. 4. The double glass structure according to any one of claims 1 to 3, wherein the viscoelastic support has a heat insulating property equal to or higher than that of air. 5. The double glass structure according to any one of claims 1 to 4, wherein the viscoelastic support is a combination of a viscoelastic body and a heat insulating member. . 6. The double glazing structure according to claim 1, wherein the space is hermetically sealed.