JP2022119508A - soundproof material - Google Patents

Abstract

To provide a soundproof material that is flexibly deformable according to the shape and size of a sound source.SOLUTION: A soundproof material 100 comprises a plurality of acoustic tubes 110 which have length directions, and a coupling member 120 which couples the plurality of acoustic tubes in a direction orthogonal to the length direction. The coupling member is fitted to first wall parts of the acoustic tubes. A sound insulation surface composed of an aggregation of the first wall parts is so constituted to bend with the first wall parts inward. The plurality of acoustic tubes adjoin in a direction orthogonal to the length direction with second wall parts adjoining the first wall parts face to face, and second wall parts of two mutually adjacent acoustic tubes may be constituted to be freely separated.SELECTED DRAWING: Figure 1

Description

One embodiment of the present invention relates to acoustic insulation.

2. Description of the Related Art Conventionally, a soundproof wall is provided between a noisy area and a quiet area in order to prevent propagation of sound emitted from a noise source. Normally, a soundproof wall is made up of a plate-like member (sound insulating material) that has a sound-insulating effect. By installing a soundproof wall between a noisy area and a quiet area, it is possible to block the propagation of sound from the noise source. .

On the other hand, sound with wave properties causes diffraction phenomena that wrap around the shadows of obstacles. Therefore, as a countermeasure against the diffraction phenomenon of sound at the upper end of the soundproof wall, a soundproof wall aiming at the sound absorbing effect of the acoustic tube has been developed. For example, Patent Literature 1 discloses a sound absorbing device having a structure in which a plurality of acoustic tubes are bundled. In this sound absorbing device, when the wavelength of the sound emitted from the sound insulation object (sound source) is λ, the length of the acoustic tube is λ/4. By utilizing the fact that the reflected sound and the reflected sound interfere with each other and cancel each other out, it is possible to reduce the wraparound of the sound due to the diffraction phenomenon described above.

JP 2020-166024 A

In the conventional technology described above, a plurality of acoustic tubes are combined to form a flat sound absorbing device, and the sound absorbing device is attached to a soundproof wall for use. In other words, there is no change in providing a soundproof wall between the noisy area and the silent area. Therefore, when it is necessary to prevent noise from propagating around the sound source, it is necessary to install a plurality of soundproof walls around the sound source. In this case, it is necessary to perform large-scale installation work to install a plurality of soundproof walls, which causes an increase in construction costs and construction time.

An object of one embodiment of the present invention is to provide a soundproof material that can be flexibly deformed according to the shape and size of a sound source.

A soundproof material in one embodiment of the present invention comprises a plurality of acoustic tubes having a longitudinal direction, and a connecting member connecting the plurality of acoustic tubes in a direction orthogonal to the longitudinal direction, wherein the connecting member A sound insulation surface attached to the first wall portion of the acoustic tube and configured by an assembly of the first wall portions is configured to be bendable with the first wall portion inside.

In the soundproof material, the plurality of acoustic tubes may be adjacent to each other in a direction orthogonal to the longitudinal direction, with the second wall portions adjacent to the first wall portions facing each other. At this time, the second wall portions of two acoustic tubes adjacent to each other may be configured to be separated from each other.

In the soundproof material, the connecting member may be a hinge provided across two adjacent acoustic tubes.

In the soundproof material, the connecting member may be a sheet-like flexible member provided across a plurality of acoustic tubes.

The soundproof material may further include a magnet facing the soundproof surface. In this case, the magnet may be a sheet-like rubber magnet provided across the plurality of acoustic tubes.

In the soundproof material, at least one of the plurality of acoustic tubes may have a through hole in the first wall, the second wall, or the third wall.

In the soundproof material, the plurality of acoustic tubes may be changeable in length in the longitudinal direction.

In the soundproof material, each of the plurality of acoustic tubes may include a first tubular member and a second tubular member slidably inserted into the first tubular member.

In the soundproof material, each of the plurality of acoustic tubes may be a tubular member having a bellows structure.

1 is a perspective view showing the configuration of a soundproof material according to a first embodiment of the present invention; FIG. It is a figure which shows the structure of the soundproof material in 1st Embodiment of this invention. It is a figure which shows the state which bent the soundproof material in 1st Embodiment of this invention. It is a schematic diagram which shows an example which mounted the soundproof material in 1st Embodiment of this invention with respect to the sound source. FIG. 4 is a schematic diagram showing another example in which the soundproof material according to the first embodiment of the present invention is attached to the sound source; It is a figure which shows the simulation result which verified the sound-proof effect with respect to the sound source of frequency 100Hz. It is a figure which shows the simulation result which verified the sound-proof effect with respect to the sound source of frequency 100Hz. It is a figure which shows the structure of the soundproof material in 2nd Embodiment of this invention. It is a figure which shows the structure of the soundproof material in 3rd Embodiment of this invention. It is a schematic diagram which shows an example which mounted the soundproof material in 3rd Embodiment of this invention with respect to the sound source. FIG. 11 is a schematic diagram showing another example of attaching the soundproof material to the sound source according to the third embodiment of the present invention. It is a figure which shows the structure of the soundproof material in 4th Embodiment of this invention. It is a figure which shows the structure of the soundproof material in 5th Embodiment of this invention. It is a schematic diagram which shows an example which mounted the soundproof material in 5th Embodiment of this invention with respect to the sound source. It is a schematic diagram which shows an example which mounted the soundproof material in 5th Embodiment of this invention with respect to the sound source. It is a figure which shows the structure of the soundproof material in 6th Embodiment of this invention. It is a figure which shows the structure of the soundproof material in 7th Embodiment of this invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention can be implemented in various aspects without departing from the gist thereof, and should not be construed as being limited to the description of the embodiments illustrated below. In the drawings, in order to make the description clearer, the width, thickness, shape, etc. of each part may be schematically represented compared to the actual embodiment, but this is only an example and limits the interpretation of the present invention. not something to do. In this specification and each drawing, elements having the same functions as those described with respect to the previous drawings are denoted by the same reference numerals, and redundant description may be omitted.

(First embodiment)
[Composition of soundproofing material]
FIG. 1 is a perspective view showing the configuration of a soundproof material 100 according to the first embodiment of the present invention. FIG. 2 is a diagram showing the configuration of the soundproof material 100 according to the first embodiment of the present invention. Specifically, FIG. 2A is a front view showing the structure of the soundproof material 100, FIG. 2B is a plan view showing the structure of the soundproof material 100, and FIG. FIG. 3 is a side view showing the configuration of the soundproof material 100; 1 and 2 show the directions from the first direction (D1 direction) to the sixth direction (D6 direction) to simplify the explanation. In this embodiment, the direction parallel to the first direction (D1 direction) or the second direction (D2 direction) is the "height direction", and the direction parallel to the third direction (D3 direction) or the fourth direction (D4 direction) is called the "width direction", and the direction parallel to the fifth direction (D5 direction) or the sixth direction (D6 direction) is sometimes called the "thickness direction".

Specifically, the soundproof material 100 of the present embodiment is a soundproof wall that is attached to a sound source to suppress divergence of sound emitted from the sound source. The soundproof material 100 has a length in the thickness direction of 10 to 15 cm, and a length in the height direction is set according to the sound emitted from the sound source to be soundproofed. That is, the length in the height direction is set to λ/4, where λ is the wavelength of the sound from the sound source. Although the length in the width direction is arbitrary, as will be described later, the soundproof material 100 of this embodiment is configured to be bendable at a desired position. However, these numerical values are merely examples, and do not limit the shape of the soundproof material 100 .

For example, if the frequency (f) of sound to be soundproofed is 100 Hz and the speed (c) of sound is 340 m/s, the wavelength (λ) of sound is λ=c/f=3.4 m. That is, when the frequency of sound to be soundproofed is 100 Hz, the soundproofing effect can be obtained by setting the length of the acoustic tube 110 to λ/4=0.85m. Similarly, when the frequency of sound to be soundproofed is 200 Hz, the wavelength (λ) is λ=c/f=1.7 m, so the length of the acoustic tube 110 is set to λ/4=0.425 m. do it.

As shown in FIGS. 1 and 2, the soundproof material 100 is a plate-like member configured by connecting a plurality of acoustic tubes 110 in the width direction. In FIGS. 1 and 2, one acoustic tube 110 is indicated by diagonal lines. The acoustic tube 110 is a tubular member having a rectangular cross section whose longitudinal direction is the height direction. The acoustic tube 110 has a one-side open tubular structure with an open end 114 at the upper end (end in the D1 direction) and a closed end 115 at the lower end (end in the D2 direction). In this embodiment, the acoustic tube 110 is constructed from a plastic material. However, the material is not limited to this example, and paper, wood, metal material, or the like may be used.

As shown in FIG. 2, each acoustic tube 110 is composed of a wall portion 112a, a wall portion 112b adjacent to the wall portion 112a, and a wall portion 112c adjacent to and facing the wall portion 112a. That is, the space surrounded by the walls 112a, 112b, and 112c functions as an acoustic tube. Here, in FIGS. 2A and 2B, only one wall portion 112b is shown between two adjacent acoustic tubes 110, but actually two wall portions 112b are shown. exists. As will be described later, the individual acoustic tubes 110 are merely connected to each other by connecting members 120, and the acoustic tubes 110 are adjacent in the width direction with the wall portions 112b facing each other.

As shown in FIG. 2A, the walls 112a of the acoustic tube 110 form a sound insulation surface 150 by arranging them in the width direction. Here, the "sound-insulating surface" is the surface facing the sound source when using the sound-insulating material 100 of the present embodiment. In this embodiment, the wall portion 112a of each acoustic tube 110 forming the sound insulation surface 150 may be referred to as a "first wall portion". In other words, the sound insulation surface 150 is composed of an assembly of the first wall portions (specifically, the outer surface of the first wall portions) of each acoustic tube 110 . Similarly, in the present embodiment, the wall portion 112b may be called the "second wall portion" and the wall portion 112c may be called the "third wall portion".

A connection member 120 is attached to the sound insulation surface 150 . Specifically, the connecting member 120 is adhered to the sound insulation surface 150 with an adhesive or the like (not shown). The connecting member 120 is a member that connects the plurality of acoustic tubes 110 in the width direction orthogonal to the longitudinal direction, as shown in FIGS. 2(B) and 2(C). In this embodiment, a sheet-like flexible member, for example, a sheet-like resin member is used as the connecting member 120 . That is, the soundproof material 100 of this embodiment is configured by arranging a plurality of independent acoustic tubes 110 side by side in the width direction via a common connecting member 120 .

As described above, the soundproof material 100 is configured using a plurality of sound tubes 110, and each sound tube 110 exhibits the effect of reducing the sound diffraction phenomenon. That is, the soundproofing material 100 not only blocks the sound with the soundproofing surface 150, but also suppresses the sound exceeding the upper end of the soundproofing material 100 due to the diffraction phenomenon. When the inner diameter of each acoustic tube 110 (the length of each side if the cross section is rectangular) is D, the inner diameter D is set so that D<0.59λ with respect to the wavelength λ of the sound from the sound source. It is preferable to set That is, in the soundproof material 100 of this embodiment, the distance between the wall portions 112a and 112c and the distance between the two adjacent wall portions 112b are smaller than 0.59λ. If such conditions are satisfied, the sound that has entered the interior of the acoustic tube 110 can be regarded as a plane wave, so it is sufficient to consider the sound pressure distribution inside the acoustic tube 110 only in the longitudinal direction.

[Deformation of soundproof material]
FIG. 3 is a diagram showing a bent state of the soundproof material 100 according to the first embodiment of the present invention. The soundproof materials 100 are connected to each other by connecting members 120 attached to the walls 112a of the acoustic tubes 110 . That is, since the adjacent acoustic tubes 110 are not directly bonded, the wall portions 112b are configured to be separated from each other. In other words, the soundproof material 100 is rotatable around the side edge of the wall portion 112a. Therefore, as shown in FIG. 3, the sound insulation surface 150 of the sound insulation material 100 can be bent at any position with the wall portion 112a facing inward. However, when the soundproof material 100 is bent, the connection member 120 is also bent. Therefore, it is desirable that the thickness of the connecting member 120 is as thin as possible so as not to hinder the bending of the soundproof material 100 .

As described above, since the soundproofing material 100 of the present embodiment has a structure that can be bent in the width direction, it can be used by being freely deformed according to the size and shape of the sound source to be soundproofed. That is, the soundproofing material 100 is usually transported as a plate-shaped soundproofing material, and can be flexibly deformed according to the size of the sound source to surround the sound source with a minimum size.

FIG. 4 is a schematic diagram showing an example of attaching the soundproof material 100 to the sound source 200 according to the first embodiment of the present invention. Specifically, FIG. 4A shows an example in which the sound insulating material 100 is attached to the rectangular sound source 200, and FIG. 4B shows an example in which the sound insulating material 100 is attached to the cylindrical sound source 200. . In the examples shown in FIGS. 4A and 4B , the length in the height direction of each acoustic tube 110 constituting the soundproof material 100 is set according to the wavelength of the sound emitted from the sound source 200 . Acoustic tube 110 is positioned such that open end 114 is positioned above and a sound insulation surface (not shown) faces sound source 200 .

As shown in FIG. 4A, when the sound source 200 has a rectangular shape, the sound emitted from the sound source 200 is efficiently suppressed by arranging the soundproof material 100 so as to surround the sound source 200 by bending it at three points. It is possible to That is, when the outer diameter of the sound source 200 is planarly polygonal, the sound insulating material 100 may be deformed along each side surface and attached to the sound source 200 . However, the present invention is not limited to this example. For example, two sheets of soundproofing material 100 may be prepared, bent at one point, and two L-shaped soundproofing materials 100 may be combined to form the state shown in FIG.

Further, as shown in FIG. 4B, when the sound source 200 is cylindrical, the sound emitted from the sound source 200 can be effectively reduced by curving the entire soundproof material 100 and arranging it so as to surround the sound source 200. can be suppressed. That is, when the side surfaces of the sound source 200 are curved, the sound insulating material 100 may be deformed along each curved surface and attached to the sound source 200 . Since the soundproof material 100 can be deformed along the curved surface in this way, it is possible to deal with the sound source 200 having an elliptical shape or a semicircular shape.

FIG. 5 is a schematic diagram showing another example in which the soundproof material 100 according to the first embodiment of the present invention is attached to the sound source 200. As shown in FIG. Specifically, FIG. 5A shows an example in which the soundproof material 100 is attached to a part of the rectangular sound source 200 (for example, the upper part of the sound source 200), and FIG. This is an example in which the soundproof material 100 is protruded from the upper part of 200 and attached. In the example shown in FIGS. 5A and 5B, the height direction length of each acoustic tube 110 constituting the soundproof material 100 is set according to the wavelength of the sound emitted from the sound source 200 . Acoustic tube 110 is positioned such that open end 114 is positioned above and a sound insulation surface (not shown) faces sound source 200 .

As shown in FIGS. 5(A) and 5(B), the sound insulation material 100 need not surround the sound source 200 in its entirety, and the sound insulation effect can be achieved by covering only a part of the sound source 200 . For example, when sound is emitted from above the sound source 200, a sufficient soundproof effect may be obtained by providing the soundproof material 100 above the sound source 200. FIG. When the sound is emitted from the upper surface of the sound source, the mode shown in FIG. 5B is particularly preferable. With the structure shown in FIG. 5B, the radiation direction of the sound emitted from the sound source can be controlled (the radiation direction of the sound is directed upward), and the sound reduction effect of the acoustic tube 110 can be enhanced.

[Effect of soundproofing material]
6 and 7 are diagrams showing simulation results of verifying the sound insulation effect for a sound source with a frequency of 100 Hz. Specifically, FIG. 6A shows the sound pressure level distribution of diffracted sound when a normal soundproof wall (a simple plate-shaped wall member) is arranged so as to surround a sound source with a frequency of 100 Hz. FIG. 6B shows the sound pressure level distribution of diffracted sound when the soundproof wall of this embodiment (the soundproof material 100 of this embodiment) is arranged so as to surround a sound source with a frequency of 100 Hz. FIG. 7 shows the distribution of the difference in sound pressure level between the diffracted sounds based on the simulation results shown in FIGS. 6(A) and 6(B).

In the simulation of this embodiment, it is assumed that a sound source with a width of 1.0 m and a height of 0.4 m in a cross-sectional view vibrates its upper surface at a frequency of 100 Hz and a vibration speed of 0.01 m/s, thereby emitting sound. ing. In order to accommodate sound with a frequency of 100 Hz, it is assumed that a soundproof wall with a length (height) of 0.85 m and a thickness of 0.1 m is installed on the side of the sound source.

As shown in FIG. 6A, in the case of a normal soundproof wall, for example, at a position about 1.0 m away from the vicinity of the upper end of the soundproof wall, the sound pressure level is about 92 dB. As shown in FIG. 6B, in the case of the soundproof wall of this embodiment, the sound pressure level is at least 84 dB or less at a position about 1.0 m away from the vicinity of the upper end of the soundproof wall. . That is, as shown in FIG. 7, when the soundproof wall of this embodiment was used, the effect of reducing the sound pressure level by about 10 dB in the outer side was recognized as compared with the normal soundproof wall.

The soundproof material 100 of this embodiment includes a plurality of acoustic tubes 110 and connecting members 120 that connect the acoustic tubes 110 in the width direction. By having, it is possible to configure the soundproof material 100 that can be bent at any position. As a result, it is possible to provide a soundproof material that can flexibly deform the soundproof material 100 according to the shape and size of the sound source to be soundproofed. In particular, the soundproofing material 100 of the present embodiment can be flexibly deformed so that it can be directly attached to the sound source, and can efficiently suppress the divergence of sound in a small space. Furthermore, by attaching the soundproof material 100 to the sound source, the rigidity of the sound source is improved, and a secondary effect of reducing radiation sound is also obtained.

The soundproofing material 100 of the present embodiment is effective as a soundproofing measure for a sound source in which the emitted sound is fixed to some extent, such as a sound source installed outdoors. If the shape of the sound source is not relatively complicated, it is preferable to adopt a configuration in which the sound insulation material 100 is directly attached. Examples of such sound sources include air conditioning outdoor units (f = 63 to 125 Hz), cooling towers (f = 63 to 125 Hz), cubicles (f = 125 to 250 Hz), diesel generators (f = 63 to 125 Hz), construction Outside the engine room of a machine (vehicle) (f=31.5 to 125 Hz).

If the shape of the sound source is complicated or not uniform, the sound insulation material 100 may be arranged so as to surround the sound source. Examples of such sound sources include pumps (f = 63 to 125 Hz), fans (sirocco fans, pressure fans, etc.) (f = 63 to 125 Hz), boilers (f = 63 to 125 Hz), construction machines (vehicles). around the muffler (f = 31.5 to 125 Hz).

(Modification 1)
In the first embodiment, an example in which the connecting member 120 is provided on the entire surface of the sound insulation surface 150 (FIG. 2) composed of the wall portions 112a of the acoustic tubes 110 is described, but the present invention is not limited to this example. For example, the connecting member 120 may be provided with belt-shaped connecting members that are long in the width direction on a part of the sound insulation surface 150 , specifically near the upper end and the lower end of the acoustic tube 110 . In this case also, by attaching the connecting member 120 across the plurality of acoustic tubes 110, the acoustic tubes 110 can be connected adjacent to each other in the width direction.

Also, the connecting member 120 may be a plurality of connecting members each having a size spanning two adjacent acoustic tubes 110 and arranged in the vicinity of the upper end and the lower end of the acoustic tube 110 in the width direction. Also in this case, the plurality of acoustic tubes 110 are indirectly connected by the plurality of connecting members 120 to form the integrated soundproof material 100 .

(Second embodiment)
In this embodiment, a soundproof material 100a having a structure different from that of the first embodiment will be described. Specifically, the soundproof material 100a of this embodiment has a magnet 130 for mounting on a sound source. In this embodiment, the same reference numerals are used for the same elements as in the first embodiment, and detailed description thereof is omitted.

FIG. 8 is a diagram showing the configuration of a soundproof material 100a according to the second embodiment of the present invention. Specifically, FIG. 8A is a front view showing the structure of the soundproof material 100a, FIG. 8B is a plan view showing the structure of the soundproof material 100a, and FIG. FIG. 3 is a side view showing the structure of the soundproof material 100a;

As shown in FIGS. 8A to 8C, in the soundproof material 100a of the present embodiment, the magnet 130 is arranged over the connecting member 120. As shown in FIGS. That is, the magnet 130 is provided facing the sound insulation surface 150 of the sound insulation material 100a. In this embodiment, specifically, a sheet-like rubber magnet is used as the magnet 130 . A rubber magnet is a flexible magnet formed by mixing magnetic powder into rubber, and in this embodiment, a rubber magnet processed into a sheet shape is used.

The method of fixing the magnet 130 to the connecting member 120 may be a method of adhering the magnet 130 to the connecting member 120 with an adhesive or the like, or a method of fixing using a fastener such as a bolt. Further, for example, if the acoustic tube 110 is made of a metal material, it may be configured to be fixed by the magnetic force of the magnet 130 itself.

The magnet 130 of this embodiment bends together with the soundproof material 100a, similarly to the connecting member 120. As shown in FIG. Therefore, it is desirable that the magnet 130 be as thin as possible so as not to interfere with the bending of the soundproof material 100a. However, without being limited to this example, the magnet 130 may be locally arranged with respect to the sound insulation surface 150 . For example, by providing the magnet 130 for each acoustic tube 110, it is possible to configure the magnet 130 so that the magnet 130 does not straddle a plurality of acoustic tubes 110. FIG. In this case, since the magnet 130 does not interfere when the soundproof material 100a is bent, there is an advantage that the degree of freedom in selecting the magnet 130 is improved. The magnets 130 may be arranged in the vicinity of the four corners of the sound insulation surface 150 or may be arranged along each side of the sound insulation surface 150, and there are no particular restrictions on the arrangement method.

(Third embodiment)
In this embodiment, a soundproof material 100b having a structure different from that of the first embodiment will be described. Specifically, the soundproof material 100b of this embodiment has a through hole 116 in each acoustic tube 110b for use when attaching to a sound source. In this embodiment, the same reference numerals are used for the same elements as in the first embodiment, and detailed description thereof is omitted.

FIG. 9 is a diagram showing the structure of a soundproof material 100b according to the third embodiment of the invention. Specifically, FIG. 9A is a front view showing the structure of the soundproof material 100b, FIG. 9B is a plan view showing the structure of the soundproof material 100b, and FIG. Fig. 10 is a side view showing the structure of the soundproof material 100b; 9(B) corresponds to an end view of FIG. 9(A) cut along line AA, and FIG. 9(C) is an end view of FIG. 9(A) cut along line BB. Corresponds to cut end view.

The soundproof material 100b of this embodiment has a through hole 116 in the upper portion (near the open end 114) of each acoustic tube 110b. However, in this embodiment, since the wall portion 112a of the acoustic tube 110b is provided with the through hole 116, as shown in FIGS. A through hole is also provided at the same position in the member 120 . In FIGS. 9A to 9C, the through-holes provided in the acoustic tube 110b and the connecting member 120 are collectively referred to as "through-holes 116" for ease of explanation. The soundproof material 100b of this embodiment can be directly attached to a sound source by passing a wire such as a cord or a wire through the through hole 116 provided in each acoustic tube 110b.

FIG. 10 is a schematic diagram showing an example in which the soundproof material 100b according to the third embodiment of the present invention is attached to the sound source 200. As shown in FIG. Specifically, FIG. 10A is a plan view showing a sound source 200 to be soundproofed with the soundproof material 100b attached thereto, and FIG. is a side view showing.

As shown in FIGS. 10A and 10B, a projection 210 is provided on the top surface of the sound source 200 . The projecting portion 210 can be, for example, attached to the sound source 200 with a bolt, nail, pin-shaped member, or the like, or can utilize the projecting portion of the sound source 200 itself. A wire 220 processed into an annular shape is hooked on the projecting portion 210, and the wire 220 is passed through the through hole 116 of the soundproof material 100b. That is, the soundproof material 100b is attached in a state of hanging down from the upper portion of the sound source 200. As shown in FIG.

FIG. 11 is a schematic diagram showing another example in which the soundproof material 100b according to the third embodiment of the present invention is attached to the sound source 200. As shown in FIG. Specifically, FIG. 11A is a plan view showing a sound source 200 to be soundproofed with the soundproofing material 100b attached thereto, and FIG. is a side view showing.

As shown in FIGS. 11A and 11B, a connecting ring 230 is inserted through the through hole 116 provided in the acoustic tube 110b of the soundproof material 100b. The soundproof material 100b to which the connection ring 230 is attached is arranged so as to face one surface of the sound source 200 and the other surface facing the one surface. Each connection ring 230 attached to the two soundproof materials 100b in that state is connected to each other by the wire 220. As shown in FIG. Accordingly, the soundproof material 100b is attached to the sound source 200 in a hanging state.

As described above, in the present embodiment, by providing the through hole 116 in the acoustic tube 110b, the soundproof material 100b can be directly attached to the sound source by passing a wire such as a cord or a wire.

In this embodiment, as shown in FIG. 9A, an example in which the through holes 116 are provided in each acoustic tube 110b is shown, but it is not necessary to provide the through holes 116 in all the acoustic tubes 110b, and a plurality of acoustic A configuration in which a through hole 116 is provided in a portion of the pipe 110b may be employed. For example, the through-holes 116 may be provided in every other acoustic tube 110b among the plurality of acoustic tubes 110b.

Further, in the present embodiment, an example in which the through hole 116 is provided in the wall portion 112a of the acoustic tube 110b is shown, but the present invention is not limited to this example, and the through hole 116 is provided in the wall portion 112b or the wall portion 112c of the acoustic tube 110b. may be configured as follows.

Furthermore, FIG. 9A shows an example in which the through hole 116 is provided in the vicinity of the open end 114 of the acoustic tube 110b, but the position of the through hole 116 is not limited to this example and is arbitrary. However, the through hole 116 is desirably provided at a position where the acoustic tube 110b functions normally as an acoustic tube.

(Fourth embodiment)
In this embodiment, a soundproof material 100c having a structure different from that of the first embodiment will be described. Specifically, in the soundproof material 100c of this embodiment, the adjacent acoustic tubes 110c are connected by hinges 118. As shown in FIG. In this embodiment, the same reference numerals are used for the same elements as in other embodiments, and detailed description thereof is omitted.

FIG. 12 is a diagram showing the configuration of a soundproof material 100c according to the fourth embodiment of the invention. Specifically, FIG. 12A is a front view showing the configuration of the soundproof material 100c, and FIG. 12B is a plan view showing a state in which the soundproof material 100c is bent. The soundproof material 100c of this embodiment is provided with a hinge 118 straddling two acoustic tubes 110c adjacent to each other. The hinge 118 is also called a hinge, and is a connecting member for rotatably connecting two members. Although there is no particular limitation on the material that constitutes the hinge 118, it is preferably a plastic material or a metal material. In this embodiment, an example in which the hinges 118 are provided at two locations near the upper end and the lower end of the acoustic tube 110c is shown, but the hinges 118 are not limited to this example and may be provided at three or more locations in the height direction.

As shown in FIGS. 12A and 12B, the hinge 118 is provided on the sound insulation surface 150 of the sound insulation material 100c. That is, hinge 118 is attached to wall 112a of each acoustic tube 110c. The hinge 118 may be fixed using a fastener such as a screw, or may be fixed using an adhesive or the like.

As shown in FIG. 12B, the soundproof material 100c of this embodiment can be bent at any position with the hinge 118 inside. Therefore, like the first embodiment, the soundproof material 100c can be used by being flexibly deformed according to the shape and size of the sound source to be soundproofed.

(Fifth embodiment)
In this embodiment, a soundproof material 100d having a structure different from that of the first embodiment will be described. Specifically, in the soundproof material 100d of the present embodiment, each acoustic tube 110d is composed of a cylindrical member having a bellows structure. In this embodiment, the same reference numerals are used for the same elements as in other embodiments, and detailed description thereof is omitted.

FIG. 13 is a diagram showing the configuration of a soundproof material 100d according to the fifth embodiment of the present invention. Specifically, FIG. 13 is a front view showing the configuration of the soundproof material 100d. In this embodiment, a cylindrical member having a bellows structure 112da is used as each acoustic tube 110d that constitutes the soundproof material 100d. A bellows structure refers to a structure in which mountain folds and valley folds are repeated, and is also called a bellows structure.

As shown in FIG. 13, the mountain folds and valley folds of the bellows structure 112da are continuously formed in the height direction of the acoustic tube 110d. Therefore, each acoustic tube 110d can be expanded and contracted in the height direction, and the length in the longitudinal direction can be changed. However, the portion where the connecting member that connects the acoustic tubes 110d is arranged (hereinafter referred to as "connecting portion 112db") does not have the bellows structure 112da because it cannot be expanded or contracted. For example, in this embodiment, an example using the hinge 118 described in the fourth embodiment is shown as a connection member, but as shown in FIG. , the bellows structure 112da is not provided.

Since each acoustic tube 110d has a bellows structure 112da, the soundproof material 100d of this embodiment has a structure that can be expanded and contracted in the longitudinal direction. That is, each acoustic tube 110d can change its length according to the wavelength of the sound emitted by the sound source. Therefore, the soundproof material 100d of this embodiment can be bent not only in the width direction but also in the height direction. Therefore, the soundproofing material 100d can be deformed according to the wavelength of the emitted sound as well as the size and shape of the sound source, and can provide soundproofing effects for various types of sound sources.

FIG. 14 is a schematic diagram showing an example in which the soundproof material 100d according to the fifth embodiment of the present invention is attached to the sound source 200. As shown in FIG. Specifically, FIGS. 14A and 14B are examples in which a rectangular sound source 200 is fitted with a soundproof material 100d. In the example shown in FIGS. 14A and 14B, the length in the height direction of each acoustic tube 110d constituting the soundproof material 100d is set according to the wavelength of the sound emitted from the sound source 200. The acoustic tube 110 d is arranged such that the open end 114 is positioned above and the sound insulation surface (not shown) faces the sound source 200 .

In the example shown in FIG. 14(A), the acoustic tube 110d is extended so that the length of the acoustic tube 110d becomes 1/4 of the wavelength of the sound emitted from the sound source 200, and the lower portion is bent 90°. This is an example. In the example shown in FIG. 14B, the acoustic tube 110d is extended so that the length of the acoustic tube 110d becomes 1/4 of the wavelength of the sound emitted from the sound source 200, and the lower portion is bent 180°. This is an example of folding.

The soundproof material 100d of the present embodiment is bendable not only in the width direction but also in the height direction. It can be installed without In order to realize the configuration as shown in FIGS. 14A and 14B, the hinge 118 attached to the lower side of the bending portion in the width direction should be removed. In this embodiment, if the hinge 118 is fixed with a screw or the like, the hinge 118 can be easily attached and detached.

Also, although FIGS. 14A and 14B show an example in which the acoustic tubes 110d have the same length, the present invention is not limited to this example. That is, the plurality of acoustic tubes 110d may be used as a plurality of acoustic tubes having different lengths. For example, when two types of frequencies are to be supported, the plurality of acoustic tubes 110d may be configured to have the same length every other one. That is, when dealing with sounds of n types of frequencies, the plurality of acoustic tubes 110d may have n types of lengths. Such a configuration is effective when the sound source to be soundproofed emits sounds of a plurality of frequencies or surrounds a plurality of sound sources which emit sounds of different frequencies.

FIG. 15 is a schematic diagram showing an example in which the soundproof material 100d according to the fifth embodiment of the present invention is attached to the sound source 200a. Specifically, in FIGS. 15A and 15B, the lengths of the plurality of acoustic tubes 110d are varied alternately to exhibit a soundproofing effect against sounds of two types of frequencies. This is an example of That is, the soundproof material 100d shown in FIGS. 15A and 15B is configured by alternately arranging acoustic tubes 110da and acoustic tubes 110db having different lengths.

In the example shown in FIG. 15A, the length of the acoustic tube 110da is set according to the wavelength of the sound of the first frequency emitted from the sound source 200a. The length of the acoustic tube 110db is set according to the wavelength of the sound of the second frequency emitted from the sound source 200a. In the example shown in FIG. 15A, since the sound of the first frequency has a lower frequency (longer wavelength) than the sound of the second frequency, the acoustic tube 110da is longer than the acoustic tube 110db. Therefore, the acoustic tube 110da secures the length by bending the lower part thereof by 90 degrees.

Also in the example shown in FIG. 15B, the length of the acoustic tube 110da is set according to the wavelength of the sound of the first frequency emitted from the sound source 200a. Similarly, the length of the acoustic tube 110db is set according to the wavelength of the sound of the second frequency emitted from the sound source 200a. In the example shown in FIG. 15(B), the acoustic tube 110da secures its length by bending a lower part thereof by 180 degrees.

As described above, in the soundproof material 100d of this embodiment, the length of each acoustic tube 110d can be changed, so that the length of each acoustic tube 110d can be adjusted to correspond to sounds of a plurality of frequencies. . As a result, the soundproofing material 100d can exert a soundproofing effect even for a sound source that emits a complex sound in which high-frequency sound and low-frequency sound are mixed, for example.

(Sixth embodiment)
In this embodiment, a soundproof material 100e having a structure different from that of the first embodiment will be described. Specifically, the soundproof material 100e of this embodiment is composed of two cylindrical members in which the acoustic tubes 110e slide relatively. In this embodiment, the same reference numerals are used for the same elements as in other embodiments, and detailed description thereof is omitted.

FIG. 16 is a diagram showing the configuration of a soundproof material 100e according to the sixth embodiment of the present invention. Specifically, FIG. 16A is a front view showing the configuration of the soundproof material 100e, FIG. C) is a front view of the cross-sectional structure of the connecting portion 112e. In the soundproof material 100e of this embodiment, each acoustic tube 110e includes a first tubular member 310 and a second tubular member 320 slidably inserted into the first tubular member 310. As shown in FIG. A portion where the first tubular member 310 and the second tubular member 320 overlap is called a connecting portion 112e.

As shown in FIGS. 16(B) and 16(C), each acoustic tube 110e has a first cylindrical member 310 disposed on an upper side having an open end 114 and a second cylindrical member 310 disposed on a lower side having a closed end 115. As shown in FIGS. It has a structure in which a cylindrical member 320 is arranged. However, without being limited to this example, the lower side may be the first tubular member 310 and the upper side may be the second tubular member 320 .

The inner wall of the first tubular member 310 is provided with a protruding portion 310a that protrudes inward. As shown in FIG. 16B, in the present embodiment, two projecting portions 310a are provided at positions facing each other. On the other hand, the second tubular member 320 is provided with a long hole 320a penetrating through the wall surface. Two elongated holes 320a are provided at positions facing each other. Specifically, as shown in FIG. 16C, the long hole 320a is provided at a position corresponding to the projecting portion 310a. Therefore, the two projecting portions 310a are configured to reach the inside of the tube of the second cylindrical member 320 through the elongated holes 320a.

The outer wall of the second tubular member 320 slides on the inner wall of the first tubular member 310, and the acoustic tube 110e slides in the vertical direction. At this time, the movement of the second tubular member 320 stops when the end of the elongated hole 320a abuts on the projecting portion 310a. That is, the projecting portion 310a and the elongated hole 320a function as a limiting portion (stopper) that determines the movable range of the second cylindrical member 320 at the connecting portion 112e.

As described above, the soundproof material 100e of this embodiment has a structure in which each acoustic tube 110e can be extended and contracted in the longitudinal direction by means of a slide mechanism. That is, each acoustic tube 110e can change its length according to the wavelength of the sound emitted by the sound source. Therefore, the soundproof material 100e of this embodiment can be bent in the width direction and can be expanded and contracted in the height direction. Therefore, the soundproofing material 100e can be deformed according to the wavelength of the emitted sound in addition to the size and shape of the sound source, and can provide soundproofing effects for various types of sound sources.

(Seventh embodiment)
In this embodiment, a soundproof material 100f having a structure different from that of the first embodiment will be described. Specifically, the soundproof material 100f of this embodiment has a structure in which a plurality of soundproof materials 100f can be connected to each other. In this embodiment, the same reference numerals are used for the same elements as in other embodiments, and detailed description thereof is omitted.

FIG. 17 is a diagram showing the configuration of a soundproof material 100e according to the sixth embodiment of the present invention. Specifically, FIG. 17A is a front view showing the configuration of the soundproof material 100f, FIG. 17B is an enlarged view of the configuration of the connecting portion 140 as seen from above, ) is a diagram showing how two soundproof materials 100f are connected to each other. As shown in FIG. 17(A), the soundproof material 100f of this embodiment has a structure that can be connected to each other in the width direction via the connecting portion 140. As shown in FIG.

As shown in FIG. 17B, the connecting portion 140 has a first member 141 and a second member 142 . The first member 141 functions as a female member and the second member 142 functions as a male member. In this embodiment, the first member 141 and the second member 142 are connected by fitting the second member 142 to the first member 141 . The first member 141 and the second member 142 are each attached to the wall portion 112b of the acoustic tube 110 positioned at the end of the soundproof material 100f. Materials for the first member 141 and the second member 142 are not particularly limited, but plastic materials or metal materials can be used.

When connecting two sheets of soundproof material 100f, as shown in FIG. By sliding 142, the first member 141 and the second member 142 can be connected. In this manner, since the soundproof material 100f of the present embodiment can connect a plurality of soundproof materials 100f, the size of the soundproof material 100f can be changed according to the size and shape of the sound source.

(Eighth embodiment)
Although the first to sixth embodiments have been described with a sound source installed outdoors in mind, the present invention is not limited to this example, and can be installed as a soundproof wall for a sound source installed indoors. For example, the soundproofing material described in the above embodiments can be used by attaching it to equipment, pumps, etc. installed in a factory.

In addition, by taking advantage of the fact that it can be bent in the width direction at any position, it can be used to form a plurality of free spaces in a large space such as a conference hall. All of the soundproofing materials described in the above embodiments can be bent and arranged at any position, so for example, a polygonal space such as a pentagon or a hexagon or a circular space can be arranged according to the situation on the spot. It is also easy to form.

Each embodiment of the present invention and modifications thereof can be implemented in combination as appropriate as long as they do not contradict each other. Based on the above-described embodiments or modifications thereof, those skilled in the art may appropriately add, delete, or change the design of components, or add, omit, or change the conditions of steps. As long as it has the gist of the invention, it is included in the scope of the present invention.

In addition, other effects that are different from the effects brought about by the aspects of the above-described embodiments or modifications thereof are obvious from the description of the present specification or can be easily predicted by those skilled in the art. What is gained is, of course, understood to be provided by the present invention.

Reference numerals 100, 100a to 100e: soundproof material 110, 110b to 110e: acoustic tube 112a to 112c: wall portion 112da: bellows structure 112db: connecting portion 112e: connecting portion 114: open end 115: closed end DESCRIPTION OF SYMBOLS 116... Through-hole, 118... Hinge, 120... Connection member, 130... Magnet, 140... Connection part, 141... First member, 142... Second member, 150... Sound insulation surface, 200, 200a... Sound source, 210... Projection part , 220... No. line, 230... Connection ring, 310... First tubular member, 310a... Protruding part, 320... Second tubular member, 320a... Long hole

Claims (10)

a plurality of acoustic tubes having a longitudinal direction;
a connecting member that connects the plurality of acoustic tubes in a direction orthogonal to the longitudinal direction;
with
The connecting member is attached to the first wall of the acoustic tube,
A sound insulating material, wherein a sound insulating surface composed of an aggregate of the first wall portions is configured to be bendable with the first wall portions inside. the plurality of acoustic tubes are adjacent to each other in a direction orthogonal to the longitudinal direction with second wall portions adjacent to the first wall portions facing each other;
2. The soundproofing material according to claim 1, wherein the second walls of two acoustic tubes adjacent to each other are configured to be separated from each other. The soundproofing material according to claim 1 or 2, wherein the connecting member is a hinge provided across two acoustic tubes adjacent to each other. 2. The soundproofing material according to claim 1, wherein said connecting member is a sheet-like flexible member provided across a plurality of acoustic tubes. 5. The soundproofing material according to any one of claims 1 to 4, further comprising a magnet provided facing the soundproof surface. 6. The soundproof material according to claim 5, wherein said magnet is a sheet-like rubber magnet provided over said plurality of acoustic tubes. The soundproof material according to any one of claims 1 to 6, wherein at least one of said plurality of acoustic tubes has a through hole in said first wall, second wall or third wall. The soundproof material according to any one of claims 1 to 7, wherein the plurality of acoustic tubes are variable in length in the longitudinal direction. 9. The soundproof material according to claim 8, wherein each of said plurality of acoustic tubes includes a first tubular member and a second tubular member slidably inserted into said first tubular member. The soundproof material according to claim 8, wherein each of the plurality of acoustic tubes is a cylindrical member having a bellows structure.

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