JP2018065714A - Double layer glass, double layer glass unit, and spacing member for double layer glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double layer glass whose appearance is not damaged while securing required sound insulation performance.SOLUTION: Provided is a double layer glass, in which, for sealing the peripheries of two plate glasses, using a spacing member S as the spacing member S arranged along the peripheral parts of the plate glasses, comprising: a hollow shape material 20 with a cylindrical hollow part 25 in which the hollow part 25 is separated into a first space and a second space by a partition; and a plurality of resonance pipes 30 inserted from the outside of the hollow shape material 20 into the first space of the hollow shape material 20 and having hole parts 23a respectively located in the outside of the first space and the hollow shape material 20 and communicating an air layer between the two plate glasses, the peripheral parts are sealed.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a multilayer glass, a multilayer glass unit, and a spacing member for multilayer glass.

  In order to effectively block outside noise, a double-glazed glass in which two plate glasses are arranged with an air layer interposed therebetween is used. It is known that the sound insulation performance of the multilayer glass is related to the coincidence effect caused by the bending phenomenon of the glass surface and the resonance transmission phenomenon caused by the resonance of two opposing glass plates. Particularly in the case of double-glazed glass, there has been a problem that the sound insulation performance is lowered due to the resonance transmission phenomenon in the low frequency range.

  In order to prevent a decrease in sound insulation performance due to the resonance transmission phenomenon in this low frequency range, for example, in Patent Document 1, a rod-shaped member is arranged at a predetermined distance with respect to a spacer member of a multilayer glass generally used conventionally, A hollow portion is formed by a rod-shaped member, a spacer member, and two sheet glasses, and the rod-shaped member is provided with a plurality of through holes that communicate the hollow portion and the multilayer glass air layer portion. Multi-layer glass that forms a resonator to improve sound insulation performance has been proposed.

JP 2003-63844 A

  However, in the multilayer glass according to Patent Document 1, it is necessary to dispose the rod-shaped member at a distance from the spacer member in order to form the hollow portion, and there is a problem that the rod-shaped member becomes conspicuous over the plate glass. .

  An object of the present invention is to provide a multi-layer glass that ensures the required sound insulation performance and does not impair the appearance.

In order to achieve the above object and other objects, one embodiment of the present invention includes:
Two sheet glasses are opposed to each other through a spacing member arranged along the peripheral edge, and are a multi-layer glass formed by sealing between the spacing member and each of the sheet glasses,
The spacing member is
A hollow shape member having a cylindrical hollow portion, wherein the hollow portion is separated into a first space and a second space by a partition,
The hollow shape member is inserted from the outside of the hollow shape member into the first space, and communicates between the first space and the air layer between the two sheet glasses, which are outside the hollow shape member. A plurality of resonance tubes having holes to be configured,
It is a double-layer glass.

  According to the above-described embodiment of the present invention, it is possible to provide a multi-layer glass that does not impair the appearance while ensuring the required sound insulation performance.

FIG. 1 is a front view of a multilayer glass unit 1 including a multilayer glass 10 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a state before processing of the spacer profile 20 used for the multilayer glass 10. FIG. 3 is a cross-sectional view showing a state after processing of the spacer profile 20 used for the multilayer glass 10. FIG. 4 is a longitudinal sectional view of the resonance tube 30 used for the multilayer glass 10. FIG. 5 is a cross-sectional view of the spacer S used in the multilayer glass 10. FIG. 6 is a schematic diagram showing the principle of a Helmholtz resonator. FIG. 7 is a partial longitudinal sectional view of the multilayer glass unit 1. FIG. 8 is a partial cross-sectional view of the multilayer glass unit 1.

  Hereinafter, the present invention will be described with reference to the accompanying drawings in accordance with the embodiment.

  In FIG. 1, the front view of the multilayer glass unit 1 provided with the multilayer glass 10 by one Embodiment of this invention is shown. The multi-layer glass unit 1 is configured by fixing a multi-layer glass 10 of the present embodiment described later to a sash frame 100. FIG. 1 is a view of the double glazing unit 1 as viewed from a direction orthogonal to the plane of the double glazing 10. Along the inner edge of the sash frame 100, a side surface of a spacer (interval member), which will be described later, used to fix the two glass plates with a gap therebetween appears. Although the double glazing unit 1 of FIG. 1 is illustrated in a vertically long rectangular shape, it may be configured in a desired shape other than this.

  2 and 3 are cross-sectional views of the spacer profile 20 that is a component of the spacer used in the multilayer glass 10 of the present embodiment. FIG. 2 shows a state before processing, and FIG. 3 shows a state after processing. The spacer profile 20 (hollow profile) of this embodiment is a long member manufactured by extrusion molding of aluminum. As shown in FIG. 2, the spacer shape member 20 has a shape in which a convex portion 21 (second portion) and a lower portion 22 (first portion) each having a hollow portion having a substantially rectangular cross section are integrally formed. In the portion 21, a partition wall 23 that bisects the hollow portion inside the spacer profile 20 is provided in the width direction. As will be described later, the hollow portion formed on the side of the convex portion 21 functions as a cavity portion 24 (first space) constituting the Helmholtz resonator in the present embodiment. The width of the convex portion 21 is set to be narrower than the width of the lower portion 22 by separating the primary seal and the convex portion 21 described later, which are configured between the lower portion 22 and the glass sheets 10a and 10b, It is intended that the cavity 24 in the convex portion 21 functions effectively as a resonance volume.

  The hollow portion 25 (second space) formed on the side of the lower portion 22 serves as a storage space for a desiccant that absorbs moisture in the air layer of the multilayer glass 10. Since the partition wall 23 is installed at a position where a required resonance frequency is obtained by the resonance volume of the cavity 24, a space for a desiccant to be described later can be made larger than before, and dew condensation inside the multilayer glass 10 can be prevented. It is possible to improve the effect.

  In addition, the recessed part 22a provided in the both-sides edge part of the lower part 22 has a function which improves the familiarity with the spacer shape material 20 and the primary sealing material of the multilayer glass 10. FIG.

  FIG. 3 shows a state where the spacer member 20 of FIG. 2 has been processed to be used for the spacer S. Specifically, the resonance tube insertion holes 21a are perforated at predetermined intervals in the longitudinal direction of the spacer shape member 20 in the center portion in the width direction on the bottom surface of the convex portion 21 of the spacer shape member 20. Further, an air circulation hole 23a (opening) is drilled in the partition wall 23 so as to be substantially aligned with the resonance tube insertion hole 21a through the resonance tube insertion hole 21a. A resonance tube described later is attached to the resonance tube insertion hole 21a by press-fitting in this embodiment. The air circulation hole 23 a has a function of allowing air to flow between the hollow portion 25 in which the desiccant is accommodated through the resonance tube and the air layer of the multilayer glass 10. As will be described later, the resonance tubes have the same external shape, and a predetermined resonance frequency can be obtained by making a hole having a diameter corresponding to a desired resonance frequency inside.

  Next, the resonance tube will be described. FIG. 4 shows a longitudinal sectional view of the resonance tube 30 used in the present embodiment. The resonance tube 30 is formed to include a substantially cylindrical body portion 31 and a flange portion 32 that is an enlarged diameter portion provided at one end portion of the body portion 31, and a through hole 30 a penetrating the body portion 31 is provided. It has been. A portion adjacent to the flange portion 32 of the body portion 31 is a large-diameter portion 31a having a diameter larger than the other portions by a predetermined amount. The diameter of the large diameter portion 31 a is set so as to be an interference fit with respect to the diameter of the resonance tube insertion hole 21 a provided in the spacer shape member 20. For this reason, by press-fitting the resonance tube 30 into the resonance tube insertion hole 21a, the resonance tube 30 is fixed to the spacer shape member 20 with only the flange portion 32 appearing at the bottom of the convex portion 21 of the spacer shape member 20. The With such a configuration, there is an effect that the resonance tube 30 attached to the spacer shape member 20 is not conspicuous and the design of the multilayer glass 10 is not impaired. In this embodiment, the resonance tube 30 is made of stainless steel.

  Next, the spacer S of this embodiment configured by combining the spacer shape member 20, the resonance tube 30 and the like will be described. FIG. 5 shows a cross-sectional view of the spacer S. When configuring the spacer S, first, the desiccant 50 is accommodated in the hollow portion 25 of the spacer shape member 20, and the sealing member 40, which is a long member having a substantially rectangular cross section, is inserted into the cavity portion 24. Thereafter, the resonance tube 30 is press-fitted into each resonance tube insertion hole 21a, whereby the sealing member 40 is pressed against the partition wall 23 by the end surface of the body portion 31 of the resonance tube 30 and fixed, whereby the spacer S is completed. . Even if the sealing material 40 is pressed against the partition wall 23 by using, for example, foamed urethane foam, the through hole 30a of the resonance tube 30 communicates with the air layer of the multilayer glass 10 so that the air layer It can absorb moisture. Further, as will be described later, both end portions of the hollow portion 25 of the spacer profile 20 are sealed by stoppers described later so that the desiccant 50 does not escape.

  Here, the configuration and operation of the Helmholtz resonator mounted on the multilayer glass 10 of the present embodiment will be described. FIG. 6 shows a schematic diagram of a Helmholtz resonator.

The resonance frequency fr of the Helmholtz resonator is
fr = C / 2π × √ (S / V (L + 0.6a)) (1)
It can be calculated by the following formula. Here, C is the speed of sound, S is the cross-sectional area of the resonance tube, V is the resonance volume, L is the length of the resonance tube, a is the radius of the resonance tube, and 0.6 is the length correction value of the resonance tube. This length correction value is a correction value for considering a phenomenon in which part of the air at the end of the resonance tube is oscillated by being partially dragged by the air vibration in the resonance tube.

Next, transform equation (1)
fr = C / 2π × √ (π × a ² / V (L + 0.6a))
= C / 2π × a × √ (π) × 1 / √ (V) × 1 / √ (L + 0.6a) (2)
Get. From equation (2), the resonance frequency fr is proportional to the inner diameter d (= 2a) of the resonance tube, inversely proportional to the square root of the resonance volume V, and inversely proportional to the square root of the length (L + 0.6a) of the resonance tube. It is derived.

Here, when the diameter of the body 31 of the resonance tube 30 used in the multilayer glass 10 of the present embodiment is D (= 5.3 mm), the penetration volume v of the resonance tube into the resonance volume 24 is
v = π / 4 × D2 × (L + 0.6a) = π / 4 × 5.3 ² × 8.4mm = 185mm ³
It becomes. On the other hand, the volume V of the resonance volume 24 in the present embodiment is as follows: pitch P = 92 mm, which is the arrangement interval of the resonance tubes 30, height H = 11 mm of the resonance volume 24, and width W = 8 mm.
V = 92 × 11 × 8 −185 = 8096 −185 = 7911mm ³ = 7.911 × 10 ^-6 m ³
It becomes.

In the present embodiment, the speed of sound C at 20 ° C. = 343.4 m / s, the length L of the resonance tube 30 = 10 mm = 0.01 m, the diameter d = 1.5 mm of the through hole 30a provided in the resonance tube 30, and the radius a = 1.5. When mm / 2 = 0.00075m, the resonance frequency fr is
fr = 343.4m / 2π × 0.00075m × √ (π) × 1 / √ (7.911 × 10 ^-6 m ³ )
× 1 / √ (0.01m + 0.6 × 0.00075m)
= 253Hz
It can be asked.

  Similarly, when the diameter d and the radius a of the through hole 30a are changed as follows, the resonance frequency fr in each case is obtained.

以上に示したように、本実施形態の複層ガラス１０では、スペーサＳに設ける共鳴管３０の貫通穴３０ａの寸法を変えることによって、共振周波数frを調整することができる。特に、スペーサＳを構成する各部の寸法を上記の例示のように設定した場合には、共振周波数frはほぼ２００〜５００Hzの範囲に設定することができる。このような数値範囲に共振周波数frが設定される場合、コインシデンス効果により、複層ガラス１０を構成する板ガラス１０ａ，１０ｂの振動と入射音波とが共振して透過損失が少なくなる現象が起こりやすいことが知られている。本実施形態の複層ガラス１０によれば、一般に遮断しにくい低音域での遮音性能を高めることが可能となる。

As described above, in the multilayer glass 10 of the present embodiment, the resonance frequency fr can be adjusted by changing the dimension of the through hole 30a of the resonance tube 30 provided in the spacer S. In particular, when the dimensions of the parts constituting the spacer S are set as illustrated above, the resonance frequency fr can be set in a range of approximately 200 to 500 Hz. When the resonance frequency fr is set in such a numerical range, a phenomenon in which the transmission loss is reduced due to resonance of the vibrations of the glass plates 10a and 10b constituting the multilayer glass 10 and the incident sound wave is likely to occur due to the coincidence effect. It has been known. According to the multilayer glass 10 of the present embodiment, it is possible to improve the sound insulation performance in a low sound range that is generally difficult to block.

  Next, the multilayer glass unit 1 comprised using the multilayer glass 10 of this embodiment is demonstrated. FIG. 7 shows an example of a partial longitudinal sectional view of the multilayer glass unit 1, and FIG. 8 shows an example of a partial transverse sectional view of the multilayer glass unit 1. As described with reference to FIG. 1, the multilayer glass unit 1 is configured by fixing the multilayer glass 10 to the sash frame 100.

  The sash frame 100 is an angle member having a substantially U-shaped cross section, and can be formed, for example, as an aluminum extruded shape member. The multi-layer glass 10 according to the present embodiment is fixed to the sash frame 100 by a configuration as described later, and constitutes an aluminum fitting such as a window.

  As shown in FIG. 8, the multilayer glass 10 of the present embodiment has a spacer S disposed along the edge of each side of the rectangular plate glasses 10 a and 10 b, and is fixedly sealed between the plate glasses 10 a and 10 b and the spacer S. The double-glazed glass 10 is completed by forming a stop structure. Specifically, the glass sheets 10a and 10b are in close contact with the elastic glass material such as butyl rubber on both side surfaces in the width direction of the lower portion 22 of the spacer member 20 which is a constituent member of the spacer S, so that the multilayer glass 10 A primary seal 80 is constructed. Further, on each side of the multilayer glass 10, the recesses formed by the sheet glass 10a, the bottom surface of the lower portion 22 of the spacer shape member 20, and the sheet glass 10b on the outer peripheral side of the multilayer glass 10 are sealed with a sealing material such as silicon. A sealed secondary seal 82 is formed.

  As shown in FIGS. 7 and 8, a setting block 70, which is a substantially rectangular parallelepiped member, is disposed between the lower end portion of the multilayer glass 10 and the inner bottom surface of each sash frame 100 facing each other. The material of the setting block 70 is selected from members having appropriate elasticity such as hard rubber, receives the weight of the multilayer glass 10, and is held at an appropriate interval from the sash frame 100.

  Between each outer surface of plate glass 10a, 10b which comprises the multilayer glass 10, and the inner surface of the sash frame 100, the string-shaped buffer material 90 which has a substantially circular cross section is arrange | positioned. The buffer material 90 can be formed using, for example, foamed polyethylene.

  An outer seal 85 seals between the outer surfaces of the plate glasses 10 a and 10 b constituting the multilayer glass 10 and the inner surface of the sash frame 100. The external seal 85 can be formed of a sealing material such as silicon.

  Referring to the longitudinal sectional view of FIG. 7, both end portions of each spacer shape member 20 of the multilayer glass 10 are obliquely cut at approximately 45 ° and are abutted with each other to form corner portions of the multilayer glass 10. ing. A stopper 55 formed of foamed polyethylene or the like is provided in the hollow portion 25 near both ends of each spacer shape member 20 in order to prevent the drying material 50 accommodated in the hollow portion 25 from escaping from the hollow portion 25. It is fixed.

  The spacer members 20 of the spacer S that are abutted at each corner of the multilayer glass 10 are connected to each other by a corner key 60 and fixed. The corner key 60 can be formed of an appropriate resin material. The corner key 60 is formed by obliquely implanting a plurality of pleated members inclined from both ends of the L-shape toward the intersection of the L-shape on a substantially L-shaped plate material bent at a right angle. When the corner key 60 is inserted into the hollow portion 25 of the spacer shape member 20, the pleated member generates a frictional force on the inner surface of the hollow portion 25, so that the corner key 60 does not escape from the hollow portion 25.

  In the multilayer glass 10 of the present embodiment, as shown in FIG. 8, the resonance tube insertion holes 21 a into which the resonance tube 30 can be press-fitted are provided at regular intervals on the upper surface of the spacer member 20 of the spacer S. The resonance tube 30 can be easily attached and the attaching operation can be automated. When sound insulation performance at a specific frequency is required depending on the external environment, a plurality of types of resonance tubes 30 having different hole diameters are prepared, and resonances with appropriate hole diameters that match the requirements are prepared. If the tube 30 is selected, it is possible to obtain sufficient sound insulation performance according to the requirements.

  In addition, if two or more types of resonance tubes 30 having different hole diameters are provided in a single multilayer glass 10, it is possible to improve the sound insulation performance over a wide range of frequencies.

  Next, the design features of the multilayer glass 10 of the present embodiment will be described. First, in the present embodiment, by adjusting the thickness of the setting block 70, it is set so that the barbage, which is a dimension representing the length by which the peripheral end surface of the multilayer glass 10 enters the sash frame 100, is 15 mm. ing. In that case, the convex portion 21 of the spacer S in the double glazing 10 is slightly visible by the height of 13 mm protruding from the edge of the sash frame 100, so that it looks like a frame that is elongated with respect to the sash frame 100. It is visible and has an inconspicuous design effect.

  In addition, when the sash frame 100 is a silver-based color, it is advantageous that the spacer shape member 20 has a similar silver-based color because it is not noticeable when viewed from the outside. Similarly, when the sash frame 100 is a dark color such as bronze, the same effect can be obtained by making the spacer shape member 20 black.

  According to the multilayer glass 10 and the multilayer glass unit 1 of this embodiment demonstrated above, the effect that an external appearance is not impaired can be acquired, ensuring required sound insulation performance.

  The scope of the present invention is not limited to the above-described embodiments, but is defined by the description of the appended claims, and extends to equivalents and modifications thereof.

DESCRIPTION OF SYMBOLS 1 Multi-layer glass unit 10 Multi-layer glass 20 Spacer shape member 21a Resonance tube insertion hole 23a Air distribution hole 24 Hollow portion 25 Hollow portion 30 Resonance tube 40 Sealant 100 Sash frame S Spacer

Claims (8)

Two sheet glasses are opposed to each other through a spacing member arranged along the peripheral edge, and are a multi-layer glass formed by sealing between the spacing member and each of the sheet glasses,
The spacing member is
A hollow shape member having a cylindrical hollow portion, wherein the hollow portion is separated into a first space and a second space by a partition wall;
The hollow shape member is inserted from the outside of the hollow shape member into the first space, and communicates between the first space and the air layer between the two sheet glasses, which are outside the hollow shape member. A plurality of resonance tubes having holes to be configured,
Double layer glass. The multilayer glass according to claim 1,
The partition is provided with an opening at a position aligned with the hole into which the resonance tube is inserted, and the second space contains a desiccant,
Double layer glass. The multilayer glass according to claim 2,
The opening of the partition wall is closed by a sealing material made of a foam material pressed against the partition wall by the resonance tube.
Double layer glass. The multilayer glass according to claim 1,
Among the plurality of resonance tubes, those having different diameters of the holes are mixed,
Double layer glass. The multilayer glass according to claim 1,
The hollow shape member of the spacing member is provided with a first portion that is in close contact with the plate glass on its side surface, and a second portion that is narrower than the first portion, and the first space includes the second portion. Provided in the
Double layer glass. The multilayer glass according to claim 1,
The plurality of resonance tubes are inserted into the hollow shape member at regular intervals along the longitudinal direction of the hollow shape member.
Double layer glass.   A multilayer glass unit in which the multilayer glass according to any one of claims 1 to 6 is supported and fixed by a sash frame provided at a peripheral edge of the multilayer glass. A hollow shape member having a cylindrical hollow portion, wherein the hollow portion is separated into a first space and a second space by a partition,
The hollow shape member is inserted from the outside of the hollow shape member into the first space, and communicates between the first space and the air layer between the two sheet glasses, which are outside the hollow shape member. A plurality of resonance tubes having holes to be configured,
Spacing member for multilayer glass.

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