JPH0941328A - Sound wave absorber and soundproof wall using the absorber - Google Patents
Sound wave absorber and soundproof wall using the absorberInfo
- Publication number
- JPH0941328A JPH0941328A JP19394495A JP19394495A JPH0941328A JP H0941328 A JPH0941328 A JP H0941328A JP 19394495 A JP19394495 A JP 19394495A JP 19394495 A JP19394495 A JP 19394495A JP H0941328 A JPH0941328 A JP H0941328A
- Authority
- JP
- Japan
- Prior art keywords
- sound wave
- wave absorber
- resin
- sound
- soundproof wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 56
- 239000011347 resin Substances 0.000 claims abstract description 53
- 229920005989 resin Polymers 0.000 claims abstract description 53
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 24
- 239000004917 carbon fiber Substances 0.000 claims abstract description 24
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 18
- 239000005011 phenolic resin Substances 0.000 claims description 13
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 12
- 229920000800 acrylic rubber Polymers 0.000 claims description 10
- 229920000058 polyacrylate Polymers 0.000 claims description 10
- 230000000694 effects Effects 0.000 abstract description 11
- 238000010521 absorption reaction Methods 0.000 description 11
- 239000002184 metal Substances 0.000 description 9
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 6
- 239000003063 flame retardant Substances 0.000 description 6
- 230000002238 attenuated effect Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005187 foaming Methods 0.000 description 4
- 230000000116 mitigating effect Effects 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000011491 glass wool Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920002620 polyvinyl fluoride Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、音波吸収体及びそ
れを用いた、高速道路や一般道路及び鉄道の路線等で使
用される防音壁に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound wave absorber and a soundproof wall using the sound wave absorber, which is used on highways, general roads, railway lines and the like.
【０００２】[0002]
【従来の技術】従来、高速道路や線路等騒音源の側壁と
して設置する防音壁は、第１従来例として、グラスウー
ルあるいはロックウールを音波吸収体とし、この音波吸
収体を金属製の壁本体の両面に沿って内側に介装した金
属製防音壁Ｂがあり、図６に示すように、高速道路Ａの
両端部において、この金属製防音壁Ｂがコンクリート製
の躯体部Ｃの上部に設置されていた。また第２従来例と
して、図示していないが、透明なポリカーボネイト板を
遮音板とした樹脂製防音壁があった。2. Description of the Related Art Conventionally, as a first conventional example, a soundproof wall installed as a side wall of a noise source such as a highway or a railroad has glass wool or rock wool as a sound wave absorber, and this sound wave absorber is used as a metal wall body. There is a metal soundproof wall B interposed inside along both sides. As shown in FIG. 6, at both ends of the highway A, the metal soundproof wall B is installed above the concrete frame part C. Was there. Further, as a second conventional example, although not shown, there was a resin soundproof wall using a transparent polycarbonate plate as a sound insulating plate.
【０００３】[0003]
【発明が解決しようとする課題】上記した第１従来例の
金属製防音壁Ｂでは、グラスウールあるいはロックウー
ルからなる音波吸収体により自動車等の騒音を吸音でき
る。しかし、金属製防音壁Ｂの壁本体が金属であるた
め、放送局Ｄからのテレビ電波がコンクリート製の躯体
部Ｃによる反射に加え、この金属製防音壁Ｂによっても
反射して、テレビ電波反射エリアＥを生じ、付近の民家
にゴースト等のテレビ電波障害を引き起こしていた。こ
のため、周辺の民家への電波障害除去対策として、共同
アンテナ又はテレビケーブル等の設置が必要であった。In the metal soundproof wall B of the above-mentioned first conventional example, noise of an automobile or the like can be absorbed by the sound wave absorber made of glass wool or rock wool. However, since the metal body of the metal soundproof wall B is made of metal, in addition to the reflection of the TV radio waves from the broadcasting station D by the concrete frame C, the metal soundproof wall B also reflects the TV radio wave reflection. Area E was created, causing television interference such as ghosts in nearby private houses. For this reason, it was necessary to install a common antenna or TV cable as a measure to remove radio interference in the surrounding private houses.
【０００４】また、第２従来例の樹脂製防音壁では、透
明なポリカーボネイト板を使用しているので、運転手か
ら外の景色が見え、また付近の民家の日照権等の問題も
なく、樹脂は電波を透過するので、ゴースト等のテレビ
電波反射障害もない。しかし、樹脂板だけであるため、
吸音性能がなく遮音性能だけであり、防音性に問題があ
った。また、テレビ電波が自動車に当たり反射し、この
反射電波が樹脂板を透過し本来の放送局からのテレビ電
波と干渉するいわゆるフラッタ障害を生じ、第１従来例
の金属製防音壁と同様に、民家にゴースト等のテレビ電
波障害を引き起こしていた。In addition, since the resin soundproof wall of the second conventional example uses the transparent polycarbonate plate, the outside scenery can be seen from the driver, and there is no problem such as the sunshine right of the private house in the vicinity. Since it transmits radio waves, there is no TV radio wave reflection obstacle such as ghost. However, since it is only a resin plate,
There was a problem with soundproofing because it had no sound absorption performance but only sound insulation performance. Also, TV radio waves hit an automobile and are reflected, and the reflected radio waves pass through the resin plate and interfere with TV radio waves from the original broadcasting station, so-called flutter failure occurs, and similar to the metal soundproof wall of the first conventional example, a private house Was causing television interference such as ghosts.
【０００５】本発明は、上記事由に鑑みてなしたもの
で、その第１の目的とするところは、電波吸収性を備え
た音波吸収体を実現し、さらに第２の目的とするところ
は、その音波吸収体を用いた、民家への電波反射エリア
を軽減できかつフラッタ障害もない防音壁を提供するこ
とにある。The present invention has been made in view of the above circumstances. A first object of the present invention is to realize a sound wave absorber having a radio wave absorbing property, and a second object thereof is: An object of the present invention is to provide a soundproof wall using the sound wave absorber, which can reduce the area where radio waves are reflected to a private house and has no flutter obstacle.
【０００６】[0006]
【課題を解決するための手段】上記した課題を解決する
ために、請求項１記載の音波吸収体は、発泡化された樹
脂の中に２乃至２０重量％の炭素繊維を含む構成にして
ある。In order to solve the above-mentioned problems, the acoustic wave absorber according to claim 1 has a structure in which the foamed resin contains 2 to 20% by weight of carbon fibers. .
【０００７】請求項２記載の音波吸収体は、請求項１記
載のものにおいて、前記樹脂が、フェノール樹脂である
構成にしてある。According to a second aspect of the present invention, in the acoustic wave absorber of the first aspect, the resin is a phenol resin.
【０００８】請求項３記載の防音壁は、音源側となる一
方面側に開孔部を設けた非導電性樹脂製の壁本体と、壁
本体の両面に沿って内側に介装された音波吸収体と、を
備え、音波吸収体は発泡化された樹脂の中に２乃至２０
重量％の炭素繊維を含む構成にしてある。According to a third aspect of the present invention, in a soundproof wall, a wall main body made of a non-conductive resin having an opening on one side which is a sound source side, and a sound wave interposed inside along both sides of the wall main body. And an acoustic wave absorber, wherein the acoustic wave absorber is 2 to 20 in the foamed resin.
It is configured to contain carbon fiber in an amount of wt%.
【０００９】請求項４記載の防音壁は、請求項３記載の
ものにおいて、前記音波吸収体の樹脂が、フェノール樹
脂である構成にしてある。According to a fourth aspect of the present invention, in the soundproof wall according to the third aspect, the resin of the sound wave absorber is a phenol resin.
【００１０】請求項５記載の防音壁は、請求項３記載の
ものにおいて、前記壁本体の非導電性樹脂が、塩化ビニ
ール樹脂の中に５乃至４０重量％のアクリルゴムを含む
構成にしてある。According to a fifth aspect of the present invention, in the soundproof wall according to the third aspect, the non-conductive resin of the wall body contains vinyl chloride resin in an amount of 5 to 40% by weight of acrylic rubber. .
【００１１】請求項６記載の防音壁は、請求項３記載の
ものにおいて、前記壁本体の他方面側と前記音波吸収体
との間に空洞を設けた構成にしてある。According to a sixth aspect of the present invention, in the soundproof wall according to the third aspect, a cavity is provided between the other surface side of the wall body and the sound wave absorber.
【００１２】[0012]
【発明の実施の形態】本発明の音波吸収体及びそれを用
いた防音壁の一実施形態を、図１乃至図３に基づいて以
下に説明する。本実施形態の防音壁１は、壁本体２及び
音波吸収体３からなっている。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a sound wave absorber and a soundproof wall using the same according to the present invention will be described below with reference to FIGS. The soundproof wall 1 of the present embodiment includes a wall body 2 and a sound wave absorber 3.
【００１３】壁本体２は、塩化ビニール樹脂の中に２０
重量％のアクリルゴムを含む非導電性樹脂により、略直
方体に形成され、音源側となる一方面２ａ側には、列設
されたフィンでもって、後述する音波吸収体３を収容す
るための収容空間２ｄに通じる複数個の開孔部２ｂを有
し、壁本体２の他方面２ｃ側と上記収容空間２ｄとの間
には５個に分割された空間である空洞２ｅを有し、表面
には紫外線などによる樹脂の劣化を防止するためにアク
リル塗料が塗装されている。The wall body 2 is made of vinyl chloride resin and is
A non-conductive resin containing a weight% of acrylic rubber is formed into a substantially rectangular parallelepiped, and the one surface 2a side which is the sound source side is accommodated by a fin arranged in a row for accommodating a sound wave absorber 3 described later. It has a plurality of openings 2b communicating with the space 2d, and has a cavity 2e, which is a space divided into five, between the other surface 2c side of the wall body 2 and the accommodation space 2d. Is coated with acrylic paint to prevent the deterioration of the resin due to ultraviolet rays.
【００１４】音波吸収体３は、図２に示すように、空孔
３ｃを有する発泡化されたフェノール樹脂３ａ中に５重
量％の炭素繊維３ｂが分散された構造であり、壁本体２
の収容空間２ｄに収容されることによって、壁本体２の
一方面２ａと他方面２ｃとの両面に沿って介装され、雨
水の侵入を防ぐためポリフッ化ビニールフィルム（図示
せず）で被覆されている。As shown in FIG. 2, the sound wave absorber 3 has a structure in which 5% by weight of carbon fiber 3b is dispersed in a foamed phenol resin 3a having pores 3c.
By being accommodated in the accommodation space 2d of the wall body 2, the wall body 2 is interposed along both the one surface 2a and the other surface 2c and is covered with a polyvinyl fluoride film (not shown) to prevent rainwater from entering. ing.
【００１５】このものの動作を説明する。図３に示すよ
うに、放送局４から発信されたテレビ電波は、高速道路
５に設置された防音壁１と高速道路５上のコンクリート
製の躯体６とに到達する。躯体６に当たったテレビ電波
は反射し、電波反射エリア７を形成するが、テレビ電波
を透過する非導電性樹脂製の壁本体２を有する防音壁１
に当たったテレビ電波は反射せず、防音壁１の壁本体２
の両面２ａ，２ｃに沿って内側に介装された音波吸収体
３に達する。そうすると、テレビ電波は１００乃至８０
０ＭＨｚの高周波であるため、この高周波により、炭素
繊維３ｂが高速で極性が変化する分極を生じ、いわゆる
誘電損失効果で電波を吸収し、電波反射障害軽減エリア
８を形成する。The operation of this device will be described. As shown in FIG. 3, TV radio waves transmitted from the broadcasting station 4 reach the soundproof wall 1 installed on the highway 5 and the concrete frame 6 on the highway 5. The soundproof wall 1 having a wall body 2 made of a non-conductive resin that reflects the TV radio waves hitting the frame 6 and forms the radio wave reflection area 7, but transmits the TV radio waves.
The TV radio wave hitting the wall does not reflect, and the wall body 2 of the soundproof wall 1
Along the both surfaces 2a, 2c, the sound wave absorber 3 interposed inside is reached. Then, the television wave is 100 to 80
Since it is a high frequency of 0 MHz, the high frequency causes polarization in which the carbon fiber 3b changes its polarity at a high speed, absorbs radio waves by the so-called dielectric loss effect, and forms the radio wave reflection obstacle mitigation area 8.
【００１６】また、高速道路５上の自動車に当たり反射
したテレビ電波は、上記と同様に防音壁１の音波吸収体
３に吸収され、民家にゴースト等のテレビ電波障害を引
き起こす原因の一つであるフラッタ障害を生じることも
ない。Further, TV radio waves reflected by a car on the highway 5 are absorbed by the sound wave absorber 3 of the soundproof wall 1 in the same manner as described above, which is one of the causes of causing TV radio wave disturbance such as ghost in a private house. There is no flutter failure.
【００１７】ここで繊維とは、長さ／直径の比率が１よ
り大きいものを指し、炭素繊維３ｂの直径は概略０．０
１乃至０．３ｍｍ、長さは０．５乃至５ｍｍが適正であ
り、対象とする吸収周波数帯域により適宜選択される。
フェノール樹脂３ａと炭素繊維３ｂとの重量を合計で１
００％としたとき、炭素繊維３ｂの重量比は２乃至２０
％が適正であり、２％未満では電波吸収効果が弱く、２
０％を越えるとフェノール樹脂３ａ中への炭素繊維３ｂ
の均一分散が阻害される。Here, the fiber means a fiber having a length / diameter ratio of more than 1, and the diameter of the carbon fiber 3b is approximately 0.0.
It is appropriate that the length is 1 to 0.3 mm and the length is 0.5 to 5 mm, which is appropriately selected according to the absorption frequency band of interest.
The total weight of the phenolic resin 3a and the carbon fiber 3b is 1
When set to 00%, the weight ratio of the carbon fibers 3b is 2 to 20.
% Is appropriate, and if less than 2%, the electromagnetic wave absorption effect is weak.
If it exceeds 0%, the carbon fiber 3b in the phenol resin 3a
The uniform dispersion of
【００１８】また、壁本体２の非導電性樹脂において、
塩化ビニール樹脂中のアクリルゴムの割合は５乃至４０
重量％が適正であり、５重量％未満ではアクリルゴム添
加の目的である耐衝撃性向上を達成できず、４０重量％
を越えると耐衝撃性がピークを越え低下する傾向とな
る。In the non-conductive resin of the wall body 2,
The ratio of acrylic rubber in vinyl chloride resin is 5 to 40
% Is appropriate, and if less than 5% by weight, the impact resistance improvement, which is the purpose of adding acrylic rubber, cannot be achieved.
If it exceeds, the impact resistance tends to exceed the peak and decrease.
【００１９】一方、高速道路５上の自動車から発生する
騒音は、防音壁１の音源側となる一方面２ａ側に設けら
れた開孔部２ｂから防音壁１内の音波吸収体３に侵入
し、その音波吸収体３内の空孔３ｃで空気摩擦により減
衰し吸音される。On the other hand, the noise generated from the automobile on the highway 5 enters the sound wave absorber 3 in the soundproof wall 1 through the opening 2b provided on the one surface 2a side which is the sound source side of the soundproof wall 1. , And the sound is absorbed by the air holes 3c in the sound wave absorber 3 due to air friction.
【００２０】この音波吸収体３の吸音率は発泡率に依存
するが、その発泡率は比重比で概略５乃至１００倍が適
正である。５倍未満では吸音率が低く、１００倍を越え
ると成形性が悪くなる。The sound absorption coefficient of the sound wave absorber 3 depends on the foaming ratio, and it is appropriate that the foaming ratio is approximately 5 to 100 times in terms of specific gravity ratio. If it is less than 5 times, the sound absorption is low, and if it exceeds 100 times, the moldability becomes poor.
【００２１】かかる音波吸収体３にあっては、上記した
ように、適正な量である５重量％の炭素繊維３ｂが発泡
化された樹脂３ａの中に分散しているので、炭素繊維３
ｂの分散が均一であるとともに炭素繊維３ｂの誘電損失
効果により電波を反射せず吸収でき、かつ、樹脂３ａが
発泡化され空孔３ｃを形成しているので音波を空孔３ｃ
内で空気摩擦により減衰し吸音できる。さらに、樹脂３
ａが発泡化されている上に比重の小さい炭素繊維３ｂを
使用しているので、吸音性はないものの従来電波吸収体
として使用されているフェライトタイルよりも軽量化で
きる。In the sound wave absorber 3, as described above, since the proper amount of 5% by weight of the carbon fiber 3b is dispersed in the foamed resin 3a, the carbon fiber 3
b is evenly distributed, the radio waves can be absorbed without being reflected by the dielectric loss effect of the carbon fiber 3b, and the resin 3a is foamed to form the holes 3c, so that the sound waves can be transmitted through the holes 3c.
It can be damped and absorbed by air friction inside. Furthermore, resin 3
Since the carbon fiber 3b having a small specific gravity is used in addition to the foamed a, it can be made lighter than the ferrite tile conventionally used as a radio wave absorber although it has no sound absorbing property.
【００２２】また、樹脂３ａとして難燃性でかつ発泡化
しやすいフェノール樹脂３ａが選ばれているので、音波
吸収体３に難燃性を付与して、吸音率を高くすることが
できる。Further, since the flame-retardant and easily foamable phenolic resin 3a is selected as the resin 3a, it is possible to impart flame-retardant property to the sound wave absorber 3 and increase the sound absorption coefficient.
【００２３】かかる音波吸収体を使用した防音壁１にあ
っては、上記したように、放送局４から発信され防音壁
１に当たったテレビ電波は炭素繊維３ｂの誘電損失効果
により吸収され、テレビ電波反射障害軽減エリア８を形
成でき、高速道路５上の自動車に当たり反射したテレビ
電波も、上記と同様に吸収され、フラッタ障害を生じる
こともない。さらに、高速道路５上の自動車から発生す
る騒音源である音波は、開孔部２ｂから防音壁１内に侵
入し、音波吸収体３内の空孔３ｃで空気摩擦により減衰
し吸音される。In the soundproof wall 1 using such a sound wave absorber, as described above, the TV radio waves transmitted from the broadcasting station 4 and hitting the soundproof wall 1 are absorbed by the dielectric loss effect of the carbon fiber 3b, and the TV The radio wave reflection obstruction mitigation area 8 can be formed, and TV radio waves reflected by a car on the highway 5 are also absorbed in the same manner as described above, and flutter trouble does not occur. Further, a sound wave, which is a noise source generated from an automobile on the highway 5, enters the soundproof wall 1 through the opening 2b and is attenuated by air friction in the hole 3c in the sound wave absorber 3 to be absorbed.
【００２４】また、音波吸収体の樹脂３ａが、難燃性で
かつ発泡化しやすいフェノール樹脂であるので、防火性
に優れたものとなる。Further, since the resin 3a of the sound wave absorber is a flame-retardant and easily foamable phenol resin, it has excellent fire resistance.
【００２５】また、壁本体２の非導電性樹脂が、塩化ビ
ニール樹脂の中に２０重量％のアクリルゴムを含み、組
成範囲が適正に選ばれているので、壁本体２の耐衝撃性
を向上でき、かつ自己消火性の塩化ビニール樹脂及び紫
外線による劣化の少ないアクリルゴムであるので、壁本
体２の防火性及び耐環境性を向上できる。Since the non-conductive resin of the wall body 2 contains 20% by weight of acrylic rubber in the vinyl chloride resin and the composition range is properly selected, the impact resistance of the wall body 2 is improved. Since it is a self-extinguishing vinyl chloride resin and acrylic rubber that is less likely to be deteriorated by ultraviolet rays, the fire resistance and the environment resistance of the wall body 2 can be improved.
【００２６】また、壁本体２の他方面２ｃ側と音波吸収
体３との間に空洞２ｄを設けているので、高速道路５上
の自動車から発生する騒音源である音波を空洞２ｄ内で
空気摩擦により減衰し、他面側２ｃでの音波損失特性を
向上できる。Further, since the cavity 2d is provided between the other surface 2c side of the wall body 2 and the sound wave absorber 3, the sound wave which is a noise source generated from the automobile on the highway 5 is aired in the cavity 2d. It is attenuated by friction, and the sound wave loss characteristic on the other surface side 2c can be improved.
【００２７】なお、本実施形態では、音波吸収体３は、
発泡化された樹脂３ａをフェノール樹脂としたが、例え
ば防火性を問題としないときは可燃性のウレタン樹脂、
発泡率を問題としないときは難燃性のエポキシ樹脂、等
の他の樹脂でもよく、限定されない。In this embodiment, the sound wave absorber 3 is
Although the foamed resin 3a is a phenol resin, a flammable urethane resin, for example, when fire protection is not a problem,
Other resins such as a flame-retardant epoxy resin may be used as long as the foaming rate does not matter, and there is no limitation.
【００２８】また、本実施形態では、音波吸収体３は、
樹脂３ａ中の炭素繊維３ｂの量を５重量％としたが、要
求される電波吸収帯域により２乃至２０％の範囲で適宜
選択でき、限定されない。Further, in this embodiment, the sound wave absorber 3 is
Although the amount of the carbon fibers 3b in the resin 3a is set to 5% by weight, it can be appropriately selected within the range of 2 to 20% depending on the required electromagnetic wave absorption band and is not limited.
【００２９】また、本実施形態では、防音壁１の壁本体
２を構成する非導電性樹脂が、塩化ビニール樹脂中のア
クリルゴムの量を２０重量％としたが、要求される耐衝
撃強度により５乃至４０重量％の範囲で適宜選択でき、
さらに耐衝撃強度が必要でないときは塩化ビニール樹脂
だけでもよく、耐環境性が必要でないときはアクリルゴ
ム以外のの樹脂を塩化ビニール樹脂に添加しても良い。In the present embodiment, the non-conductive resin forming the wall body 2 of the soundproof wall 1 has the amount of acrylic rubber in the vinyl chloride resin of 20% by weight. 5 to 40% by weight can be appropriately selected,
Further, when impact strength is not required, vinyl chloride resin alone may be used, and when environmental resistance is not required, resins other than acrylic rubber may be added to vinyl chloride resin.
【００３０】また、本実施形態では、防音壁１の壁本体
２を構成する非導電性樹脂が、塩化ビニール樹脂とした
が、自己消化性を必要としない場合は、塩化ビニール樹
脂でなくてもよい。Further, in the present embodiment, the non-conductive resin forming the wall body 2 of the soundproof wall 1 is vinyl chloride resin. However, when self-extinguishing property is not required, it is not limited to vinyl chloride resin. Good.
【００３１】[0031]
【実施例】音波吸収体３の作成例及び特性を図４及び図
５に基づいて説明する。フェノール樹脂３ａに５重量％
の直径０．０１３ｍｍで長さ０．７ｍｍの炭素繊維３ｂ
を添加混合して均一に分散し、さらにこの混合物に対し
１５重量％の発泡剤を添加し、加熱しながら発泡硬化し
た。発泡率は３７倍であった。EXAMPLE An example of producing the sound wave absorber 3 and its characteristics will be described with reference to FIGS. 5% by weight to phenol resin 3a
Carbon fiber 3b with a diameter of 0.013 mm and a length of 0.7 mm
Was added and mixed to uniformly disperse the mixture, and 15% by weight of a foaming agent was added to the mixture, and the mixture was foamed and cured while being heated. The foaming rate was 37 times.
【００３２】このものの、吸音率と電波反射損失を測定
した結果をそれぞれ図４及び図５に示す。図４より、３
０Ｈｚ乃至６０００Ｈｚの音波を吸音し、概略３００Ｈ
ｚに吸音のピークがあり、吸音材料として機能している
ことがわかる。図５より、２００ＭＨｚ乃至１０００Ｍ
Ｈｚの電波を吸収し、概略５００ＭＨｚに電波吸収のピ
ークがあり、電波吸収材料としても機能していることが
わかる。つまり、電波吸収性を備えた音波吸収体３とな
っている。The results of measuring the sound absorption coefficient and the radio wave reflection loss of this product are shown in FIGS. 4 and 5, respectively. From FIG. 4, 3
Absorbs sound waves of 0Hz to 6000Hz, approximately 300H
There is a sound absorption peak at z, and it can be seen that it functions as a sound absorbing material. From Figure 5, 200MHz to 1000M
It can be seen that it absorbs a radio wave of Hz and has a peak of a radio wave absorption at about 500 MHz, which also functions as a radio wave absorbing material. That is, the sound wave absorber 3 has a radio wave absorbing property.
【００３３】[0033]
【発明の効果】請求項１記載の音波吸収体は、２乃至２
０重量％の炭素繊維が、発泡化された樹脂の中に分散し
てあるので、炭素繊維の誘電損失効果により電波を反射
せず吸収し、かつ、樹脂の発泡化された空孔内で音波を
空気摩擦により減衰して吸音し、つまり軽量で電波吸収
性を備えた音波吸収体を実現できる。The acoustic wave absorber according to claim 1 is 2 to 2
Since 0% by weight of carbon fiber is dispersed in the foamed resin, it absorbs radio waves without reflecting due to the dielectric loss effect of the carbon fiber, and the sound wave is generated in the foamed hole of the resin. It is possible to realize a sound wave absorber that is light and has a radio wave absorbing property, that is, it is attenuated by air friction and absorbs sound.
【００３４】請求項２記載の音波吸収体は、請求項１記
載のものの効果に加えて、樹脂として難燃性でかつ発泡
化しやすいフェノール樹脂が選ばれているので、防火性
が向上する。In the sound wave absorber according to the second aspect, in addition to the effect of the first aspect, since the flame-retardant and easily foamable phenol resin is selected as the resin, the fireproof property is improved.
【００３５】請求項３記載の防音壁は、壁本体は電波の
透過する非導電性樹脂からなり、音源側となる一方面側
に壁本体の内部に通じる開孔部を有し、壁本体の両面に
沿って音波吸収体を介装し、音波吸収体は発泡化された
樹脂の中に、２乃至２０重量％の炭素繊維を含むので、
放送局から発信され防音壁に当たったテレビ電波は炭素
繊維の誘電損失効果により吸収されて電波反射障害軽減
エリアを形成でき、自動車に当たり反射したテレビ電波
も、上記と同様に吸収され、フラッタ障害を生じること
もない。さらに、自動車から発生する騒音源である音波
は、開孔部から防音壁内に侵入し、音波吸収体内の空孔
内で空気摩擦により減衰し吸音される。つまり、電波反
射障害エリアを軽減できかつフラッタ障害もなく、軽量
で民家にゴースト等のテレビ電波障害を引き起こさない
防音壁を提供できる。According to another aspect of the soundproof wall of the present invention, the wall main body is made of a non-conductive resin that transmits radio waves, and has an opening communicating with the inside of the wall main body on one surface side which is the sound source side. Since the sound wave absorber is provided along both sides, and the sound wave absorber contains 2 to 20% by weight of carbon fiber in the foamed resin,
The TV radio waves transmitted from the broadcasting station and hitting the soundproof wall can be absorbed by the dielectric loss effect of carbon fiber to form a radio wave reflection obstacle mitigation area. It never happens. Further, a sound wave, which is a noise source generated from an automobile, penetrates into the soundproof wall through the opening, is attenuated by air friction in the hole in the sound wave absorber, and is absorbed. That is, it is possible to provide a soundproof wall that can reduce the radio wave reflection obstruction area, has no flutter obstruction, is lightweight, and does not cause a television electric wave obstruction such as a ghost in a private house.
【００３６】請求項４記載の防音壁は、請求項３記載の
ものの効果に加えて、音波吸収体の樹脂が、難燃性でか
つ発泡化しやすいフェノール樹脂であるので、防火性に
優れたものとなる。In addition to the effect of the third aspect, the soundproof wall according to the fourth aspect is excellent in fireproofness because the resin of the sound wave absorber is a flame-retardant and easily foamable phenol resin. Becomes
【００３７】請求項５記載の防音壁は、請求項３記載の
ものの効果に加えて、壁本体の非導電性樹脂が、塩化ビ
ニール樹脂の中に５乃至４０重量％のアクリルゴムを含
み、組成範囲が適正に選ばれているので、壁本体の耐衝
撃性を向上でき自動車が衝突したときの安全性が高くな
る。In addition to the effect of the third aspect, the soundproof wall according to the fifth aspect has a composition in which the non-conductive resin of the wall body contains 5 to 40% by weight of acrylic rubber in vinyl chloride resin. Since the range is properly selected, the impact resistance of the wall body can be improved and the safety in the event of an automobile collision is enhanced.
【００３８】請求項６記載の防音壁は、請求項３記載の
ものの効果に加えて、壁本体の他方面側と音波吸収体と
の間に空洞を設けているので、道路上の自動車から発生
する騒音源である音波を空洞内で空気摩擦により減衰
し、他面側での音波損失特性つまり遮音性能を向上でき
る。In addition to the effect of the third aspect, the soundproof wall according to the sixth aspect is provided with a cavity between the sound absorbing body and the other surface side of the wall body. The sound wave that is the noise source is attenuated by the air friction in the cavity, and the sound wave loss characteristic on the other surface side, that is, the sound insulation performance can be improved.
【図１】本発明の一実施形態を示す防音壁の断面図であ
る。FIG. 1 is a sectional view of a soundproof wall showing an embodiment of the present invention.
【図２】本発明の一実施形態を示す音波吸収体の断面拡
大図である。FIG. 2 is an enlarged cross-sectional view of a sound wave absorber showing an embodiment of the present invention.
【図３】本発明の一実施形態を示す防音壁の使用形態図
である。FIG. 3 is a usage pattern diagram of a soundproof wall showing an embodiment of the present invention.
【図４】本発明の一実施形態の具体的実施例を示す音波
吸収体の吸音率測定図である。FIG. 4 is a sound absorption coefficient measurement diagram of a sound wave absorber showing a specific example of one embodiment of the present invention.
【図５】同上の電波反射損失測定図である。FIG. 5 is a radio wave reflection loss measurement diagram of the above.
【図６】第１従来例の防音壁の使用形態図である。FIG. 6 is a diagram showing a usage pattern of a soundproof wall of a first conventional example.
１ 防音壁 ２ 壁本体 ２ｂ 開孔部 ２ｄ 空洞 ３ 音波吸収体 ３ａ 樹脂 ３ｂ 炭素繊維 1 Soundproof Wall 2 Wall Main Body 2b Opening 2d Cavity 3 Sound Absorber 3a Resin 3b Carbon Fiber
Claims (6)
％の炭素繊維を含むことを特徴とする音波吸収体。1. A sound wave absorber comprising 2 to 20% by weight of carbon fibers in a foamed resin.
特徴とする請求項１記載の音波吸収体。2. The sound wave absorber according to claim 1, wherein the resin is a phenol resin.
非導電性樹脂製の壁本体と、壁本体の両面に沿って内側
に介装された音波吸収体と、を備え、音波吸収体は発泡
化された樹脂の中に２乃至２０重量％の炭素繊維を含む
ことを特徴とする防音壁。3. A wall main body made of non-conductive resin having an opening on one surface side which is a sound source side, and a sound wave absorber interposed inside along both sides of the wall main body, The sound absorbing body is characterized in that the acoustic wave absorber contains 2 to 20% by weight of carbon fiber in a foamed resin.
脂であることを特徴とする請求項３記載の防音壁。4. The soundproof wall according to claim 3, wherein the resin of the sound wave absorber is a phenol resin.
ル樹脂の中に５乃至４０重量％のアクリルゴムを含むこ
とを特徴とする請求項３記載の防音壁。5. The soundproof wall according to claim 3, wherein the non-conductive resin of the wall body contains 5 to 40% by weight of acrylic rubber in vinyl chloride resin.
の間に空洞を設けたことを特徴とする請求項３記載の防
音壁。6. The soundproof wall according to claim 3, wherein a cavity is provided between the other surface side of the wall body and the sound wave absorber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19394495A JPH0941328A (en) | 1995-07-31 | 1995-07-31 | Sound wave absorber and soundproof wall using the absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19394495A JPH0941328A (en) | 1995-07-31 | 1995-07-31 | Sound wave absorber and soundproof wall using the absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0941328A true JPH0941328A (en) | 1997-02-10 |
Family
ID=16316355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19394495A Withdrawn JPH0941328A (en) | 1995-07-31 | 1995-07-31 | Sound wave absorber and soundproof wall using the absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0941328A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003247213A (en) * | 2002-02-26 | 2003-09-05 | Toray Ind Inc | Panel for sound-proof wall and its manufacturing method |
| KR100731650B1 (en) * | 2006-01-19 | 2007-06-22 | 이광복 | Soundproof fence |
| CN111749151A (en) * | 2019-03-29 | 2020-10-09 | 比亚迪股份有限公司 | Acoustic panels, sound barriers and track systems |
-
1995
- 1995-07-31 JP JP19394495A patent/JPH0941328A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003247213A (en) * | 2002-02-26 | 2003-09-05 | Toray Ind Inc | Panel for sound-proof wall and its manufacturing method |
| KR100731650B1 (en) * | 2006-01-19 | 2007-06-22 | 이광복 | Soundproof fence |
| CN111749151A (en) * | 2019-03-29 | 2020-10-09 | 比亚迪股份有限公司 | Acoustic panels, sound barriers and track systems |
| CN111749151B (en) * | 2019-03-29 | 2022-01-07 | 比亚迪股份有限公司 | Sound insulation panel, sound barrier and rail system |
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| Date | Code | Title | Description |
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| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20021001 |