JPH0657836A - Light transmissible sound absorbing device - Google Patents

Abstract

(57) [Abstract] [Purpose] A translucent sound absorbing device that has both translucency and sound absorption properties, and can be used for facilities such as membrane structures to satisfy both brightness and acoustic conditions at the same time. [Structure] A translucent sound absorbing device in which the circumference of a sheet of glass fiber made of crystal glass and having a thickness of 5 "is covered with a fluorinated ethylene resin film, and a polyester fiber curtain is laid on the surface thereof. By changing the thickness and combination of the glass fiber and the fluorinated ethylene resin film, the desired sound absorption rate and light transmittance can be obtained, and the volume of the sound absorbing device can be reduced to 1/2 to 1/3 by providing the coating film with the suction port. It can be deleted and stored.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a translucent sound absorbing device for use in facilities such as membrane structures, gymnasiums and pools.

[0002]

[Problems to be Solved by the Invention] Facilities such as arenas equipped with a translucent film roof coated with Teflon resin are
Sound absorption is required to hold events such as meetings and concerts. However, when a sound absorbing material was attached to the ceiling or side lighting surface, the light was blocked and darkened, and when trying to obtain brightness, a satisfactory sound absorbing effect was not obtained.

The present invention has been made in view of the above circumstances. Its purpose is to propose a translucent sound absorbing device that has both translucency and sound absorption properties and can be used in facilities such as a marina to satisfy both brightness and acoustic conditions at the same time.

[0004]

This translucent sound absorbing device is
A glass fiber layer, a synthetic resin dust-proof film layer covering the glass fiber layer, and a woven fabric layer are laminated.

As the glass fiber layer, short glass fibers are used in the form of a sheet (web). Although ordinary glass fibers can be used, glass fibers made of so-called crystal glass, which has high transparency, are more preferable.

As the dustproof film, a synthetic resin film is used which has weather resistance and does not easily adhere to dust and the like.

Films of vinyl fluoride resin, vinyl chloride resin, polyester resin, polyamide resin, polyolefin resin and the like can be used. Among them, vinyl fluoride resin is preferable because it has excellent weather resistance.

Although the woven fabric is not particularly limited, a polyester fiber woven fabric or the like is used, and a woven fabric having a high light-transmitting property, rich in designability, and easy to design is selected.

[0009]

In this translucent sound absorbing device, the three layers having different physical properties, that is, the glass fiber, the synthetic resin film covering the surface thereof, and the woven fabric are overlapped with each other to absorb the sound in each layer and at the same time At the interface of (3), sound reflection, absorption, interference, etc. occur, and as shown in Examples described later, an excellent sound absorbing effect which cannot be obtained by a single glass fiber is exhibited.

If the glass fiber layer is used as it is, dust adheres to the glass fiber, and the original translucency of the glass fiber is extremely lowered. However, by covering with a dustproof film, the translucency can be maintained for a long period of time. Therefore, a desired translucency can be secured by combining the translucent glass fiber synthetic resin translucent film and the light-colored woven fabric.

The glass fiber is liable to impair the human body because the single fiber sticks into the body, but it does not become an obstacle by covering with a synthetic resin film. In addition, fire protection can be applied to the woven fabric to prevent disasters, and the pattern color of the woven fabric can enhance the taste of the facility to which the sound absorbing device is attached.

[0012]

EXAMPLES The following materials were used for the translucent sound absorbing device of the examples. Glass fiber layer: Crystal glass fiber (manufactured by FIBAIR, USA, diameter: 16 μm) density of 7.2 k
Sheet material with g / m ³ and thickness of 5 inches.

Dustproof film: Fluorinated ethylene resin film (manufactured by DuPont) having a thickness of 25 μm, 50 μm, transparent and translucent.

Woven fabric: Polyester fiber curtain fabric that has been subjected to fireproofing.

As shown in FIG. 1, two dustproof films 1, 1
The glass fiber layer 2 was sandwiched between them to be housed and covered, the peripheral edge was heat-sealed, and the woven cloth 3 was laminated on the surface to form a translucent sound absorbing device.

The results of measuring the sound absorption coefficient by the reverberation room method of this sound absorbing device are shown in Table 1. At the same time, as comparative examples, glass fibers (density 7.2 kg) (comparative examples 1, 2 and 3), curtain fabric (comparative example 4) alone, and glass fibers coated with a fluorinated ethylene resin film (comparative examples 5, 6). ) Was measured.

[0017]

[Table 1]

Note: GF (5 ″): Glass fiber sheet thickness 5 inches C: Polyester curtain fabric T ₂ (25): Semitransparent thickness 25 μm Fluorinated ethylene resin film T ₁ (50): Transparent thickness 50 μm Foot Ethylene resin film It can be seen from Table 1 that the sound absorbing device of the example can obtain about 2.1 times the sound absorbing performance of the glass fiber alone (comparative example 1), and also the one coated with a vinyl fluoride resin film (comparative example 5). Although it shows 1.5 times the sound absorption performance of glass fiber alone, it is not as good as that of the example.It is better to cover glass fiber with synthetic resin film than to use it alone, and by overlapping woven fabric A high sound absorption performance is obtained, and a thick film (50 μm) has a higher sound absorption coefficient than a thin film (25 μm).

The light transmittance using the surface light source of the sound absorbing device of the example was 11.9%, Comparative example 1 was 25.7% and Comparative example 5 was 25.0%.

Since the glass fiber layer 2 of the sound absorbing device of this embodiment is housed in the sealed bag body of the dust-proof films 1 and 1 whose peripheral edges are heat-sealed, air can flow in and out of the bag body. If the suction port 4 is attached and the air inside is sucked, it becomes thin and the volume can be significantly reduced, and it becomes easy to store and handle, and when the valve is opened, the volume returns to a predetermined thickness of 5 inches, and it functions as a sound absorbing device. be able to.

[0021]

The present invention is as described above. Since the translucent sound absorbing device has translucency and exhibits excellent sound absorbing performance, it can be installed in a membrane structure building or an arena to provide brightness and acoustics. The conditions and can be satisfied at the same time.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a translucent sound absorbing device of an example.

[Explanation of symbols]

1 ... dust-proof film, 2 ... glass fiber, 3 ... woven cloth,
4 ... Suction port.

Front page continued (72) Inventor Takanori Ichikawa 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Koji Okamura 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Ken Inside the corporation

Claims (1)

[Claims] 1. A translucent sound absorbing device comprising a glass fiber layer, a dustproof film layer of synthetic resin covering the glass fiber layer, and a woven fabric layer, which are laminated.