JPH11200528A - Sound absorption panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a sound absorption panel wherein attaching and setting are simple and which is easy to be used as a partition wall and a soundproof wall by fitting one or a plurality of sound absorption plates formed in the form of a curved face or a curvature to a form to make a panel. SOLUTION: A pair of mesh-like metal plates 2 are overlapped on both the faces of a transparent sound absorption film to constitute a three-layered sound absorption plate 3. Next, the sound absorption plate 3 is cut to be made a rectangular flat plate, which is folded into a waveform to be fitted to an aluminum-made form 4, and a waveform recess part 3b is constrained with a support rod 5 to make a panel. A transparent rear plate 6 such as a transparent plastic plate and a glass plate is desirable to be disposed on the rear face of the sound absorption plate 3. A sound wave propagated from a sound source vibrates the sound absorption film of the sound absorption plate 3, the vibration is absorbed by the metal plate 2 of both faces to be converted into heat, and sound absorption performance is displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound absorbing panel used for a partition wall, a soundproof room wall, and the like.

[0002]

2. Description of the Related Art Heretofore, for the purpose of sound insulation by a soundproof partition or a soundproof room, a sound absorbing plate is attached to a partition or a mounting surface of an indoor wall, or a screw is attached. As the sound absorbing plate, there are various types using a sound absorbing material such as glass wool or a honeycomb plate. The sound absorbing plate shown in FIG. 5 is also one example. This sound absorbing plate has a thickness of 12 to 14 μm
A pair of expanded aluminum plates b, b are polymerized on both sides of a Teflon film a, and are made into three layers.

In the sound absorbing plate c, sound waves vibrate the film a, and the vibration is absorbed by the expanded aluminum plates b on both surfaces and converted into heat, thereby exhibiting sound absorbing performance.

[0004]

However, the conventional sound absorbing plate has a poor sound absorbing performance since its sound absorbing area is limited to the mounting area, and the sound absorbing plate c shown in FIG. For this reason, the contact between the expanded aluminum plates b and b and the film a is not sufficient, and the vibration of the film a is not sufficiently transmitted to the aluminum plates b and b, so that the sound absorbing performance cannot be sufficiently exhibited. In addition, any conventional sound absorbing plate is separately provided with a plate-like member when it is processed into a soundproof panel or the like in accordance with the frame structure of the soundproof wall on site, or is used as a partition wall or a soundproof wall. Was necessary.

The present invention has been made in view of the above problems, and has as its object to provide a sound absorbing panel which has sufficient sound absorbing performance, is easy to install and install, and can be easily used as a partition wall or a sound insulating wall.

[0006]

In order to achieve the above object, the present invention is characterized in that one or more sound absorbing plates formed into a curved surface or a bent shape are fitted into a mold to form a panel. I do.

According to the present invention, one or more sound absorbing plates formed in a curved surface or a bent shape are used. The sound absorbing area is increased and the sound absorbing performance is improved accordingly, and the sound wave passing through the sound absorbing plate can be reduced. And since the sound absorbing plate is fitted into the formwork to form a panel, it is easy to install it as a partition wall or surrounding wall, and when using it as a soundproof wall, it takes time to process it according to the dimensions and shape of the mounting surface at the site Can be omitted, and a separate plate-shaped member is not required, so that its mounting and setting are simplified.

By forming the sound absorbing plate from a plurality of cylinders and arranging them in parallel, the sound absorbing area in the mold can be increased.

It is also preferable that a sound absorbing plate composed of a pair of mesh-like metal plates is formed on both sides of the sound absorbing film to form a three-layered sound absorbing plate, and the corrugated recesses are restrained by support rods. According to the sound wave transmitted to the sound absorbing panel, first, the sound absorbing film vibrates, and this vibration is absorbed by a pair of mesh-like metal plates on both sides and is converted into heat, which causes the three-layer sound absorbing plate to have a sound absorbing performance. Demonstrate. At this time, since the flat sound absorbing plate is formed in a corrugated shape, the three layers are closely adhered to each other at the curved surface portion, so that the sound absorbing performance is easily exerted. The increase in the absorption area improves the sound absorption performance and facilitates its installation and installation. Since the support rod restrains only the corrugated concave portion, the restraint does not impair the degree of freedom of vibration of the curved portion.

It is preferable that the sound absorbing film is made of a light-transmitting film, and that a light-transmitting back plate is joined to the back of the paneled sound absorbing plate. A closed space is formed between the sound source side convex portion (back plate side concave portion) of the plate and the back plate, and in this space, sound waves passing through the sound absorbing plate are randomly reflected, interfere with each other, and are attenuated.
The sound wave passing through the back plate can be almost eliminated, and the damping effect in this space is added to the sound absorbing effect of the sound absorbing plate itself panelized by the mold and the support rod.

The back plate is translucent, and the sound absorbing plate is also made of a pair of mesh-like metal plates sandwiching a translucent sound absorbing film, so that the inside and outside can be seen through the sound absorbing panel. For example, when used as a soundproof wall of an outdoor facility such as a pool or a stadium, it does not give a feeling of oppression and is good in view.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, the sound-absorbing panel of the present embodiment has a pair of mesh-like metal plates 2, 2 on both sides of a light-transmitting sound-absorbing film 1 (FIG. 3). The layered sound absorbing plate 3 is formed, and the flat sound absorbing plate 3 cut into a rectangular shape is bent into a waveform and fitted into an aluminum form 4. The sound absorbing film 1 has a thickness of 1
A Teflon film of 2 to 14 μm is used, and the mesh-shaped metal plate 2 is an expanded aluminum plate made of aluminum, a wire mesh, a pantend plate, or the like. The mold 4 has a bottom length of about 50 cm and a horizontal length of 150 c.
m to 200 cm, height 5 cm to 10 cm, and an inward flange 4 a and an outward flange 4
b and an inward flange 4d extending therefrom. The height of the mold 4 may be set arbitrarily according to the height from the bottom of the corrugated concave portion 3b to the top of the corrugated convex portion 3a.

The sound absorbing plate 3 vibrates the film 1 by the sound wave propagated from the sound source, and the vibration is absorbed by the plates 2 on both surfaces and converted into heat, thereby exhibiting sound absorbing performance.

As shown in FIG. 3, the sound absorbing panel of this embodiment has a corrugated curved surface, so that three layers are in close contact with each other and a sound absorbing area is larger than that of a conventional flat panel. Together with this, the sound absorbing performance can be sufficiently exhibited.

The cross section of the sound absorbing plate 3 on four sides in the vertical and horizontal directions is processed with a metal foil or the like, and the end face of the wave-shaped convex portion 3a of the sound absorbing plate 3 viewed from the sound source side is connected to the inward flange 4a of the formwork 4. It is locked. Waveform concave portion 3b of sound absorbing plate 3 viewed from the sound source side
Are provided with rod-shaped support rods 5 having a diameter of about 10 mm in the width direction of the mold frame 4 by the number of the corrugated concave portions 3 b, and restraining the sound absorbing plate 3. Since the support rod 5 only slightly restrains the bottom of the corrugated concave portion 3b, which is a very small part of the sound absorbing plate 3, in the width direction, the degree of freedom of vibration of the metal plate 2 can be sufficiently secured, and the above-described sound absorbing performance can be obtained. Do not hinder. In addition, the amplitude of the wave shape of the sound absorbing plate 3 may be any length other than those described above, and the thickness of the form 4 and the number of the support rods 5 may be changed accordingly.

On the back surface of the sound absorbing plate 3, a translucent back plate 6 such as a transparent plastic plate or a glass plate is arranged so as to contact the back surface of the corrugated concave portion 3b. That is, the sound-absorbing panel of the present embodiment includes an inward flange 4 on the bottom surface of the form 4.
d (FIG. 2), the back plate 6 is fitted, the corrugated three-layered sound absorbing plate 3 is fitted, and the support rod 5 is arranged in the corrugated concave portion 3b.

By joining the back plate 6 to the sound absorbing plate 3 as in the present embodiment, the sound waves transmitted from the sound source vibrate the film 1 and most of the sound waves are converted into heat by the plates 2 and 2. The sound wave that has passed still remains in the space 7 between the back surface of the wave-shaped protrusion 3a formed between one wave-shaped recess 3b and the next wave-shaped recess 3b (wave-shaped recess when viewed from the back plate side) and the back plate 6. Thus, the sound wave is randomly reflected, interferes with each other, attenuates, and almost no sound wave passing through the back plate 6 can be eliminated, so that the soundproof performance can be further improved. Most of the sound wave from the side opposite to the sound source is reflected by the back plate 6 and returns. However, the slight sound wave passing through the back plate 6 is also reflected on the back surface of the waveform convex portion 3a in the same manner as described above. Since the sound is attenuated by being dispersed in the space 7 with the back plate 6, sound waves passing through the sound absorbing plate 3 from the side opposite to the sound source can be almost eliminated, which is favorable when used as a partition wall.

A hole 4c for screwing is formed at an appropriate position in the outward flange 4b on the outer periphery of the formwork 4. When the hole is used as a soundproof wall, it is screwed into its mounting portion or when it is used as a partition wall. Is used to connect panels. In the present embodiment, since the back plate 6 is joined to the back surface of the sound absorbing plate 3 and formed into a panel with the formwork 4 and the support rods 5, it is easy to install as a partition wall and used as a soundproof wall. In such a case, it is possible to save time and labor for processing on site, which is convenient. In addition, since the back plate 6 is translucent and the sound absorbing plate 3 is also composed of a pair of mesh-like metal plates 2 sandwiching the translucent sound absorbing film 1, the sound absorbing panel can be seen inside and outside, and the compression can be performed. It does not give a feeling and is good in view. From such a use, it is possible to provide a material optimal for use as a soundproof wall of an outdoor facility such as an outdoor pool or a stadium.

The sound absorbing panel having a large sound absorbing function on one side and a sound insulating function on the back side as described above is installed by directing the sound absorbing plate 3 toward the sound source to surround a noise source such as a cooling tower of a building. It is effective to use it as an enclosure to prevent noise from leaking to the outside. In this case, if the sound absorbing panel 3 or the back plate 6 is formed along the curved surface to form the sound absorbing panel in a curved shape,
The sound absorbing panel can easily surround the noise source, and the use of the sound absorbing panel is expanded, which is preferable.

The waveform of the sound absorbing plate 3 may be formed in a sinusoidal curved surface as described above, or may be formed in a zigzag continuous shape in a triangular shape.

The present invention can be configured in various modes in addition to the embodiments described above. For example, one or a plurality of sound absorbing plates formed in a curved surface or a bent shape may be used. In addition to a layered sound absorbing film and a metal plate, various types of sound absorbing materials can be employed. And they are transparent, opaque,
Various selections may be made. Further, the back plate and the support rod are not essential to the present invention, and are appropriately adopted according to the material and type of the sound absorbing plate.

The sound absorbing plate is formed of a plurality of cylindrical bodies 8 as in the embodiment shown in FIG. It can also be converted. The cylinder 8 is not limited to a cylinder,
For example, arbitrary shapes such as a square tube shape, a triangle tube shape, and a half-cylinder shape can be adopted. In addition to arranging the cylinders 8 continuously as shown in FIG. They can be evenly or unequally spaced.

[0024]

According to the present invention, even if the installation area is the same as the conventional one, the sound absorbing performance can be sufficiently exhibited by the larger sound absorbing area of the sound absorbing plate or the plurality of sound absorbing plates formed in a curved or bent shape. Further, the sound absorbing performance can be further increased by devising the material and configuration of the sound absorbing plate or combining the back plate. Since the sound absorbing plate is formed as a panel in a formwork, its mounting and installation are simplified, and a sound absorbing panel which can be easily used as a partition wall or a soundproof wall can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional side view of FIG.

FIG. 3 is a perspective view showing a part of the sound absorbing plate of the present invention.

FIG. 4 is a longitudinal sectional side view showing another embodiment of the present invention.

FIG. 5 is a perspective view showing a part of a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 sound absorbing film 2 mesh metal plate 3 sound absorbing plate 3 b corrugated recess 4 formwork 5 support rod 6 back plate 8 cylinder

Claims (4)

[Claims] 1. A sound-absorbing panel characterized in that one or a plurality of curved or bent sound absorbing plates are fitted into a mold to form a panel. 2. The sound-absorbing panel according to claim 1, wherein the sound-absorbing plate is formed of a plurality of cylinders, and they are arranged in parallel. 3. A sound-absorbing panel in which a pair of mesh-like metal plates are superposed on both sides of a sound-absorbing film to form a three-layered sound absorbing plate in a wavy shape, and the corrugated recesses are restrained by support rods. 4. The sound-absorbing panel according to claim 3, wherein the sound-absorbing film is made of a light-transmitting film, and a light-transmitting back plate is joined to a back surface of the paneled sound absorbing plate.