JPH0312810Y2 - - Google Patents
Info
- Publication number
- JPH0312810Y2 JPH0312810Y2 JP1985125588U JP12558885U JPH0312810Y2 JP H0312810 Y2 JPH0312810 Y2 JP H0312810Y2 JP 1985125588 U JP1985125588 U JP 1985125588U JP 12558885 U JP12558885 U JP 12558885U JP H0312810 Y2 JPH0312810 Y2 JP H0312810Y2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- sound
- perforated
- aluminum
- air space
- 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.)
- Expired
Links
- 238000010521 absorption reaction Methods 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 8
- 238000009415 formwork Methods 0.000 description 5
- 239000011491 glass wool Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Landscapes
- Building Environments (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Description
【考案の詳細な説明】
本考案は防音壁に係り、詳しくは、各部分がユ
ニツト化され、組立がきわめて容易で施工性に優
れ、広範囲の周波数にわたつて吸音でき、耐候性
に優れる防音壁に係る。[Detailed description of the invention] This invention relates to a soundproof wall, and more specifically, it is a soundproof wall in which each part is made into a unit, is extremely easy to assemble, has excellent construction properties, can absorb sound over a wide range of frequencies, and has excellent weather resistance. Pertains to.
一般に、鉄道や高速道路においては騒音に種々
の面から対策が行なわれている。その対策の一つ
として吸音としや音が行なわれる防音壁が道路や
鉄道軌道の両側に設けられ、この防音壁としては
種々のものが提案されているが、一般的なもの
は、例えば、実公昭51−39362号、特公昭54−
33650号に示される如く、主としてグラスウール
等の無機質繊維を使用しているものである。しか
し、この防音壁は、高速で運行する電車、自動車
等によつてうける振動や風圧に耐える機械的強度
がないほか、使用によつて劣化し、ガラス繊維の
飛散によつて公害上の問題が発生する。 Generally, noise countermeasures are taken from various aspects on railways and expressways. As one of the countermeasures, soundproof walls that absorb and reduce sound are installed on both sides of roads and railway tracks. Various types of soundproof walls have been proposed, but common ones include, for example, Publication No. 51-39362, Special Publication No. 54-
As shown in No. 33650, inorganic fibers such as glass wool are mainly used. However, these soundproof walls do not have the mechanical strength to withstand the vibrations and wind pressure caused by high-speed trains, automobiles, etc., and deteriorate with use, causing pollution problems due to the scattering of glass fibers. Occur.
すなわち、グラスウールは径８〜６ミクロン程
度のガラス繊維を結合剤で結着して一体化したも
のである。このため、経時的に結合剤が劣化する
と、ガラス繊維が飛散し、これを吸うと、呼吸気
系に支障を来たし、皮膚には激しい痛みを与えて
いる。また、この結合剤の劣化は通常２年程度で
あつて、グラスウールに代り、グラスウールと同
程度の価格であつて公害上の問題がなく吸音率の
高いものが望まれている。 That is, glass wool is made by binding together glass fibers with a diameter of about 8 to 6 microns with a binder. Therefore, as the binder deteriorates over time, the glass fibers scatter, and when inhaled, this causes problems in the respiratory system and causes severe pain to the skin. In addition, this binder usually deteriorates after about two years, so it is desired to replace glass wool with a material that is comparable in price to glass wool, does not cause pollution problems, and has a high sound absorption coefficient.
この点から、本考案者は特願昭50−119424号と
して、アルミニウム粉末によつては多孔質材が
仲々焼結法によつてつくることができない欠点を
克服してアルミニウム多孔質焼結材をつくり、こ
の吸音特性を有効に利用して広範囲の周波数にわ
たつて効果的に吸音でき、機械的強度が大きく耐
候性に優れる防音壁を提案した。しかしながら、
この防音壁は広範囲の周波数の吸音には適さず、
とくに、騒音源が高速で移動するため、吸音が不
十分であり、施工性の点でも支障があるため、こ
の点の改善が望まれていた。 From this point of view, the inventor of the present invention proposed a porous sintered aluminum material in Japanese Patent Application No. 119424/1983 to overcome the drawback that porous materials cannot be produced by the Naka-Naka sintering method depending on the aluminum powder. By making effective use of this sound absorption property, we proposed a soundproof wall that can effectively absorb sound over a wide range of frequencies, has high mechanical strength, and has excellent weather resistance. however,
This soundproof wall is not suitable for absorbing sound over a wide range of frequencies.
In particular, since the noise source moves at high speed, sound absorption is insufficient and construction workability is also hindered, so improvements in this aspect have been desired.
本考案はこれらのところから成立したものであ
つて、アルミニウム多孔質焼結材としや音板との
間に略々方形の横断面のエアースペースを形成し
た複数個の吸音ユニツトを、各吸音ユニツトのエ
アースペースの幅が階段状に変化するよう隣接か
つ直列に配置し、これら各吸音ユニツトの前面に
は開孔板を取付けて一体化し、この開孔板とアル
ミニウム多孔質焼結板の間には略々方形横断面の
エアースペースを更に介在させて成る防音壁を提
案する。 The present invention was developed from these points, and consists of a plurality of sound absorbing units each having an air space of approximately rectangular cross section formed between the porous sintered aluminum material and the tone plate. These sound absorbing units are arranged adjacently and in series so that the width of the air space changes in a step-like manner, and a perforated plate is attached to the front of each of these sound absorbing units to integrate them. We propose a soundproof wall that further includes an air space with a rectangular cross section.
以下、図面によつて本考案の実施態様について
説明する。 Embodiments of the present invention will be described below with reference to the drawings.
なお、第１図は本考案の一つの実施例に係る防
音壁の正面図であり、第２図は第１図のＡ−Ａ線
上の横断面図であり、第３図は第２図のイ部分の
拡大図である。 In addition, FIG. 1 is a front view of a soundproof wall according to one embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1, and FIG. FIG.
まず、第１図ならびに第２図において、符合１
はアルミニウム多孔質焼結板、２，２ａはエアー
スペース、３はしや音板を示し、焼結板１はアル
ミニウム若しくはその合金粉末から粉末冶金法に
よつて製造され焼結材１には多数の孔隙があつて
この孔隙が互いに連通し、これら孔隙中を通過す
る間は、音の波動エネルギーは熱エネルギーに変
化して失なわれ、吸音される。 First, in Figures 1 and 2, the symbol 1
1 is an aluminum porous sintered plate, 2 and 2a are air spaces, and 3 is a sound plate. The sintered plate 1 is manufactured from aluminum or its alloy powder by a powder metallurgy method, and the sintered material 1 has many parts. The pores communicate with each other, and while sound waves pass through these pores, they change into thermal energy and are lost, and the sound is absorbed.
また、しや音板３は道路や鉄道軌道に沿つて垂
直に配置され、このしや音板３に対して略々平行
に焼結板１を設けて、焼結板１としや音板３との
間にエアースペース２を形成し、このようにして
各ユニツトａ，ｂ，ｃを構成する。 Further, the tone plate 3 is arranged perpendicularly along a road or railway track, and the sintered plate 1 is provided approximately parallel to the tone plate 3. An air space 2 is formed between the two, and in this way each unit a, b, and c are constructed.
この際、各吸音ユニツトａ，ｂ，ｃにおいてし
や音板３の表面には例えばアスフアルトを主成分
とする塗料、その他のしや音性に優れる塗料を塗
布し、しや音板３や焼結材１は型枠４を介して取
付ける。すなわち、第２図に示す如く、一つの型
枠４の後端の折曲部４ａに例えばビス等をきしめ
てしや音板３を取付け、型枠４の内面にコ字状断
面の継手部４ａを設けるとともに、隣接ユニツト
の型枠４の各対向外面にコ字状断面の継手部４ｂ
を設けて、両各継手部４ａ，４ｂの中に焼結板１
を嵌入し、しや音板３に対して略々平行に固定す
る。このように各吸音ユニツトａ，ｂ，ｃにおい
て隣接型枠を兼用すると、各ユニツト毎に両側に
型枠を設けなくとも一側の型枠のみで各ユニツト
ａ，ｂ，ｃが構成できる。 At this time, in each sound absorbing unit a, b, c, the surface of the acoustic plate 3 is coated with a paint containing asphalt as a main component or another paint with excellent acoustic properties. The binding material 1 is attached via the formwork 4. That is, as shown in FIG. 2, the tone plate 3 is attached to the bent portion 4a at the rear end of one formwork 4 by tightening screws or the like, and a joint portion having a U-shaped cross section is attached to the inner surface of the formwork 4. 4a, and a joint portion 4b having a U-shaped cross section is provided on each opposing outer surface of the formwork 4 of the adjacent unit.
A sintered plate 1 is provided in each joint portion 4a, 4b.
is inserted and fixed approximately parallel to the tone plate 3. In this way, when the adjacent molds are used for each of the sound absorbing units a, b, and c, each of the units a, b, and c can be constructed using only the molds on one side without providing molds on both sides of each unit.
次に、以上の通り各吸音ユニツトａ，ｂ，ｃを
隣接かつ直列でしかもエアースペース２の幅1，
2，3が1＞2＞3になるよう配置し、これ
らの前面にしや音板３と略々平行でかつ焼結板１
の前面から間隔をおいて開孔板５を取付け、各ユ
ニツトａ，ｂ，ｃを一体化する。なお、開孔板５
は所謂パンチングメタルで良く、第３図に示す如
く開孔５ａが形成され、この開孔５ａから音が入
る。この際、開孔板５自体もある程度の吸音効果
を持つているが、本考案においては各吸音ユニツ
トで焼結板１とその両側のエアースペース２，２
ａによつて十分な吸音効果を持つているため、開
孔板５は主として降雨等を防止できれば充分であ
る。 Next, as described above, the sound absorbing units a, b, and c are arranged adjacently and in series, and the width of the air space 2 is 1 ,
2 and 3 are arranged so that 1 > 2 > 3 , and the front surface of these is approximately parallel to the tone plate 3 and sintered plate 1.
A perforated plate 5 is attached at a distance from the front surface of the unit, and the units a, b, and c are integrated. In addition, the perforated plate 5
It may be made of so-called punching metal, and has an opening 5a formed therein as shown in FIG. 3, and the sound enters through this opening 5a. At this time, the perforated plate 5 itself has a certain degree of sound absorbing effect, but in the present invention, each sound absorbing unit has the sintered plate 1 and the air spaces 2, 2 on both sides thereof.
Since a has a sufficient sound absorbing effect, it is sufficient that the perforated plate 5 mainly prevents rain and the like.
すなわち、各吸音ユニツトａ，ｂ，ｃにおい
て、表面の開孔板５の裏面にはエアースペース２
ａが形成されるほか、焼結板１としや音板３との
間にエアースペース２が形成される。つまり、両
エアースペース２ａ，２は焼結板１をはさんで対
称的に形成されている。しかし、自動車等の騒音
に較べて新幹線等の高速電車の騒音は周波数が
500〜4000Hzの如く広範囲にわたり、この騒音源
は高速で移動する。また、吸音は吸音材１の無限
に屈曲する孔隙を通る間に騒音の波動エネルギー
が熱エネルギーに変換されて行なわれるが、これ
が効果的に行なわれるのには、周波数に適合する
ことが必要であり、しや音板３で反射された音も
同様に適合することが必要である。つまり、入射
波ならびに反射波として効果的に吸音されるの
は、周波数に適合するエアースペース２，２ａが
焼結板１をはさんで適正に形成されていることが
必要であり、両エアースペースの幅が周波数と合
致していないときには、焼結材の吸音性能は十分
に発揮できない。 That is, in each sound absorption unit a, b, c, an air space 2 is provided on the back surface of the perforated plate 5 on the front surface.
In addition to forming the sintered plate 1 and the tone plate 3, an air space 2 is formed between the sintered plate 1 and the tone plate 3. That is, both air spaces 2a, 2 are formed symmetrically with the sintered plate 1 in between. However, compared to noise from automobiles, the noise from high-speed trains such as Shinkansen has a higher frequency.
Over a wide range, such as 500-4000Hz, this noise source moves at high speed. In addition, sound absorption is performed by converting the wave energy of the noise into thermal energy while passing through the infinitely curved pores of the sound absorbing material 1, but for this to be effective, it is necessary to match the frequency. There is a need for the sound reflected by the sound plate 3 to be similarly adapted. In other words, in order for sound to be effectively absorbed as incident waves and reflected waves, it is necessary that the air spaces 2 and 2a matching the frequency are properly formed with the sintered plate 1 in between, and both air spaces must be When the width of the sintered material does not match the frequency, the sound absorption performance of the sintered material cannot be fully demonstrated.
この点から、本考案では、各吸音ユニツトａ，
ｂ，ｃを互いに隣接して配置する際に、エアース
ペース２の幅1，2，3は階段状に変化させ、
これに併せて他のエアースペース２ａの幅も階段
状に変化させる。 From this point of view, in the present invention, each sound absorption unit a,
When arranging b and c adjacent to each other, the widths 1 , 2 , and 3 of air space 2 are changed in a step-like manner,
In conjunction with this, the width of the other air spaces 2a is also changed stepwise.
この際に、エアースペース２の幅1，2，
３や、他のエアースペース２ａの幅が短かいほど
高周波数が吸音され、長いほど低周波数が吸音さ
れる。このところ、本考案では、各吸音ユニツト
ａ，ｂ，ｃのエアースペース２の幅が階段状、と
くに、1＞2＞3に調整され、他のエアース
ペース２ａの幅がこれと反対の関係に調整されて
いるために、周波数に拘らず、とくに、騒音源が
高速で移動しても効率よく吸音できる。 At this time, the width of air space 2 is 1 , 2 ,
3 and other air spaces 2a, the shorter the width, the more high frequencies will be absorbed, and the longer the width, the more low frequencies will be absorbed. Recently, in the present invention, the width of the air space 2 of each sound absorption unit a, b, and c is adjusted to have a step-like shape, in particular, 1 > 2 > 3 , and the width of the other air space 2a is in the opposite relationship. Because of this adjustment, sound can be efficiently absorbed regardless of the frequency, especially when the noise source moves at high speed.
また、ちなみに第１図ならびに第２図に示す防
音壁において1＝80mm、2＝60mm、3＝30mm
の条件で実際に高速電車から騒音を吸音したとこ
ろ、周波数と吸音率の関係は第４図に示す通りで
あつた。 Also, for the soundproof walls shown in Figures 1 and 2, 1 = 80mm, 2 = 60mm, 3 = 30mm.
When noise from a high-speed train was actually absorbed under these conditions, the relationship between frequency and sound absorption coefficient was as shown in Figure 4.
これらの知見から500〜4000Hzまでの音に対し
残響室法吸音率で80％以上を示すエアースペース
の長さを求めたところ、70〜100mmから連続若し
くは階段状に15〜50mmに変化させるのが好ましい
ことがわかつた。 Based on these findings, we determined the length of the air space that exhibits a sound absorption coefficient of 80% or more using the reverberation room method for sounds between 500 and 4000 Hz, and found that it is best to change the length from 70 to 100 mm continuously or in a stepped manner to 15 to 50 mm. I found something favorable.
以上詳しく説明した通り、本考案は多孔質焼結
材の両側に方形横断面のエアースペースを介在さ
せ、これらエアースペースの幅が階段状に変化す
るよう、複数個の吸音ユニツトを配置し、更に、
焼結板と略々平行に設けた開孔板で一体化して成
るものである。従つて、広範囲の周波数の音が効
率よく吸音でき、耐候性に優れるほか、きわめて
施工性に優れ、取付けがきわめて簡単で経済的で
ある。 As explained in detail above, the present invention provides air spaces with a rectangular cross section on both sides of a porous sintered material, arranges a plurality of sound absorbing units so that the width of these air spaces changes stepwise, and further ,
It is made up of a sintered plate and a perforated plate provided approximately parallel to each other. Therefore, it can efficiently absorb sound in a wide range of frequencies, has excellent weather resistance, is extremely easy to construct, and is extremely easy and economical to install.
第１図は本考案の一つの実施例に係る防音壁の
正面図、第２図は第１図のＡ−Ａ線上の横断面
図、第３図は第２図のイ部分の拡大図、第４図は
周波数と吸音率の関係を示すグラフである。
符号、１……多孔質焼結板、２，２ａ……エア
ースペース、３……しや音板、４……型枠、５…
…開孔板、ａ，ｂ，ｃ……吸音ユニツト。
FIG. 1 is a front view of a soundproof wall according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1, and FIG. 3 is an enlarged view of part A in FIG. FIG. 4 is a graph showing the relationship between frequency and sound absorption coefficient. Code, 1...Porous sintered plate, 2, 2a...Air space, 3...Shiya tone plate, 4...Formwork, 5...
...Perforated plate, a, b, c...Sound absorption unit.
Claims (1)
しや音板の前面に平行に設けられた平坦な開孔板
５との間を垂直に隔壁により区分けして少なくと
も３つの吸音ユニツトａ，ｂ，ｃを形成し、各吸
音ユニツトａ，ｂ，ｃ内には前記しや音板３なら
びに前記開孔板５と平行にそれぞれアルミニウム
多孔質焼結板１を設け、更に、各アルミニウム多
孔質焼結板１から前記しや音板３までの各エアー
スペースの幅1，2，3が各吸音ユニツトａ，
ｂ，ｃの配列順に小さくかつ各アルミニウム多孔
質焼結板１から前記開孔板５までの各エアースペ
ースの幅が各吸音ユニツトａ，ｂ，ｃの配列順に
大きくなるよう、各吸音ユニツトａ，ｂ，ｃにお
いて各アルミニウム多孔質焼結板１を一定に位置
決めして成ることを特徴とする防音壁。 At least three sound absorbing units are formed by vertically dividing a flat perforated plate 3 arranged approximately vertically with a flat perforated plate 5 provided parallel to the front surface of the perforated tone plate by a partition wall. a, b, and c, and in each sound absorption unit a, b, and c, an aluminum porous sintered plate 1 is provided in parallel with the perforated sound plate 3 and the perforated plate 5, and each aluminum The widths 1, 2, and 3 of each air space from the porous sintered plate 1 to the sound plate 3 are the widths 1 , 2 , and 3 of each sound absorption unit a,
Each sound absorbing unit a, A soundproof wall characterized in that each porous sintered aluminum plate 1 is positioned at a constant position in b and c.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985125588U JPH0312810Y2 (en) | 1985-08-15 | 1985-08-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985125588U JPH0312810Y2 (en) | 1985-08-15 | 1985-08-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6168108U JPS6168108U (en) | 1986-05-10 |
| JPH0312810Y2 true JPH0312810Y2 (en) | 1991-03-26 |
Family
ID=30684284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985125588U Expired JPH0312810Y2 (en) | 1985-08-15 | 1985-08-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0312810Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5213007A (en) * | 1975-07-22 | 1977-02-01 | Toyota Motor Corp | Internal combustion engine is partially arranged by a by-combustion ch amber with no intake valve |
| JPS5243711A (en) * | 1975-10-03 | 1977-04-06 | Japanese National Railways<Jnr> | Sound absorbing material and its unit having excellent weather resista nce, pressure resisting strength and heat resistance |
-
1985
- 1985-08-15 JP JP1985125588U patent/JPH0312810Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5213007A (en) * | 1975-07-22 | 1977-02-01 | Toyota Motor Corp | Internal combustion engine is partially arranged by a by-combustion ch amber with no intake valve |
| JPS5243711A (en) * | 1975-10-03 | 1977-04-06 | Japanese National Railways<Jnr> | Sound absorbing material and its unit having excellent weather resista nce, pressure resisting strength and heat resistance |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6168108U (en) | 1986-05-10 |
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