JP3031575U - Sound insulation - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a sound insulation material that is lightweight, has good appearance, and has high sound insulation performance. SOLUTION: A sound insulating material 1 is composed of a metal frame material 2 and a sound absorbing material 3 provided in the metal frame material 2. The sound absorbing material 3 is configured by filling a large number of plastic pieces obtained by cutting a magnetic tape into an appropriate size or length inside a storage bag 31 made of a non-woven fabric.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a sound insulation material, for example, a light insulation material having a high sound insulation performance, which is used for a soundproof wall of a highway, a subway or a tunnel, a basement wall, or a block wall.

[0002]

[Prior art]

 For example, on highways, sound-insulating materials are widely used on both sides of the road in order to shield the noise generated as the vehicle travels. Conventionally, as this type of sound insulation material, for example, a cement board that reflects noise to the road side has been widely used.

[0003]

[Problems to be solved by the device]

 However, when a cement board is used as a sound insulation material, there is a problem that handling is time-consuming due to the heavy weight of the cement board. In addition, it is difficult to change the thickness and shape of the cement plate itself according to the application and soundproofing performance, which causes a problem of poor workability. Furthermore, even if the outer surface is colored, it is difficult to match the appearance of the cement board itself with the environment in which the sound insulation material is installed, and the landscape is poor.

An object of the present invention is to provide a sound insulation material that is lightweight, has good appearance, and has high sound insulation performance.

[0005]

[Means for Solving the Problems]

 The sound insulation material of the present invention is characterized by comprising a frame body and a sound absorbing material formed by using a plastic piece provided in the frame body.

As the sound absorbing material, for example, a crushed piece of a plastic film, that is, for example, a crushed piece of a magnetic tape is used. Further, such a plastic piece is preferably housed (filled) in a suitable storage bag, but the present invention is not limited to this, and the plastic space may be packed at a suitable density in the storage space formed in the frame. . As the storage bag, a breathable one is used so as not to impair the sound absorbing property of the plastic piece, and for example, a non-woven fabric or a plastic bag having a large number of holes is used.

As the frame body, a frame body having an appropriate strength is used, and a frame body having a large number of holes is used so as not to impair the sound absorbing property of the plastic piece. As such a frame body, a metal frame body formed by processing and molding a metal plate is preferably used. As the metal frame material, for example, a zinc iron plate or an aluminum plate is used. This frame material can easily be variously designed and colored according to the landscape of the place where the sound insulation material is installed.

In the present invention, since the sound absorbing material is composed of the plastic pieces as described above, it is possible to construct the sound insulating material in a lighter weight as compared with the case of using the cement plate. Further, since the above sound absorbing material is made of plastic, it has sufficient water resistance and durability, and since it is not a fibrous material, it does not cause a capillary phenomenon and has good drainage. The high sound absorption of the plastic pieces has a high noise reduction effect.

[0009]

[Embodiment of device]

 Embodiments of the sound insulation material of the present invention will be described below.

FIG. 1 shows an outline of the entire sound insulating material 1 of the embodiment. Further, FIG. 2 is a cross-sectional view of the sound insulation material 1. The sound insulating material 1 is composed of a metal frame material 2 and a sound absorbing material 3 provided inside the metal frame material 2.

In the illustrated example, the metal frame body 2 is composed of a front plate 21 located on the sound insulation side, which is the right side in FIG. 2, and a frame body 22 to which the front plate 21 is attached. The front plate 21 is provided with a ventilation part 23 having a large number of holes 24 as shown in FIG. Here, it is preferable to use an aluminum plate as the front plate 21 from the viewpoint of easiness of punching. The frame body 22 is made of, for example, an iron plate with a corrosion-preventing coating (such as a zinc-iron plate) in order to provide stability when installing the sound insulating material 1 as having an appropriate weight. used. The front plate 21 and the frame body 22 are joined by spot welding or brazing. Further, in the illustrated example, the hole 24 is a round hole, but it may be a square hole (square, triangular, etc.).

The sound absorbing material 3 is formed by filling a large number of plastic pieces 32 obtained by cutting a magnetic tape such as a video tape or a cassette tape into an appropriate size or length inside a storage bag 31 made of non-woven fabric. It is what is done. Here, the storage bag 31 is preferably quilted at appropriate intervals or positions, which prevents the magnetic tape in the storage bag 31 from being displaced. It is well known that such a quilting process is performed by adhering or welding the non-woven fabric in the quilted part 33.

A glass nonwoven fabric 4 is provided on the back surface of the front plate 21 by adhering to the back surface. By providing such a glass non-woven fabric 4, it is possible to prevent the sound absorbing material 3 inside the sound insulating material from being seen through from the outside through the hole 24 of the front plate 21, thereby further improving the appearance of the sound insulating material. You can Further, since the glass non-woven fabric 4 is used, the waterproofness and fireproofness are also improved.

Further, a spacer 5 for holding the sound absorbing material 3 is provided between the sound absorbing material 3 and the back surface of the frame body 22. As the spacer 5, for example, a polyester foam is used. Then, as shown in FIG. 2, the sound absorbing material 3 is placed inside the metal frame body 2 inside the metal frame body 2 in a state of being suspended by the suspenders 6.

FIG. 4 shows the sound absorption coefficient when the sound insulating material according to the embodiment of the present invention is used. This shows the sound absorption coefficient at the center frequency of the 1/3 octave band (Hz), and shows the reflection reduction volume of the sound insulation material due to road traffic noise (A characteristic noise). Thus, the sound insulation material of this embodiment has excellent sound insulation.

In this case, as the sound absorbing material 2, a crushed magnetic tape was stored in a storage bag 31 made of polyester nonwoven fabric having a basis weight of 50 g / m ^{3 at} a thickness of 50 mm and a density of 180 kg / m ³ . Further, the glass nonwoven fabric 4 is a plain weave fabric having a basis weight of 155 g / m ³ , the front plate 21 is JIS H 1000 A5052P, and the frame main body 22 is JIS G 3302 SGH-Z27. Used respectively.

The sound insulation material of this embodiment can be used, for example, as a wall facing a road where noise is generated, or for consumer use, for example, as a wall or a basement wall or ceiling. When a large number of sound insulating materials are arranged in parallel, for example, they may be fixed to appropriate supporting columns, for example, H steel, by appropriate fixing metal fittings.

[0018]

[Effect of device]

 As described above, since the sound insulation material of the present invention has a structure in which the sound absorption material made of plastic pieces is provided in the frame, it can be made lighter in weight than the conventional concrete product. It will be easier to carry out and construction. In addition, since the design and color of the frame can be changed easily and in various ways, the appearance is good and it is easy to match the external environment in which it is installed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an outline of a sound insulation material according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is an explanatory diagram of a front plate that constitutes the sound insulation material of FIG. 1.

FIG. 4 is a graph showing sound absorption characteristics of the sound insulation material of FIG.

[Explanation of symbols]

 1 Sound Insulation Material 2 Metal Frame 3 Sound Absorption Material 4 Glass Nonwoven Fabric 21 Front Plate 22 Frame Main Body 24 Hole 31 Storage Bag

Claims (5)

[Scope of utility model registration request] 1. A sound insulation material comprising a frame body and a sound absorbing material configured by using a plastic piece provided in the frame body. 2. The sound insulation material according to claim 1, wherein the sound absorption material is a crushed piece of a plastic film. 3. The sound absorbing material comprises the plastic piece housed in a housing bag.
Or the sound insulation material described in 2. 4. The frame according to claim 1, 2 or 3, wherein the frame has a large number of holes on the side of the sound insulation surface.
Sound insulation material described. 5. The frame body is formed by processing and molding a metal plate.
Sound insulation material described.