JPH0521119Y2 - - Google Patents
Info
- Publication number
- JPH0521119Y2 JPH0521119Y2 JP1987088891U JP8889187U JPH0521119Y2 JP H0521119 Y2 JPH0521119 Y2 JP H0521119Y2 JP 1987088891 U JP1987088891 U JP 1987088891U JP 8889187 U JP8889187 U JP 8889187U JP H0521119 Y2 JPH0521119 Y2 JP H0521119Y2
- Authority
- JP
- Japan
- Prior art keywords
- sound
- absorbing material
- sound absorbing
- adhesive
- porous
- 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 - Lifetime
Links
- 239000011358 absorbing material Substances 0.000 claims description 24
- 239000000853 adhesive Substances 0.000 claims description 12
- 230000001070 adhesive effect Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 description 10
- 230000007423 decrease Effects 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000007500 overflow downdraw method Methods 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
Landscapes
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Building Environments (AREA)
- Laminated Bodies (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Description
（産業上の利用分野）
本考案は、道路用防音壁等に好適な防音壁用吸
音構造体に関するものである。
（従来の技術）
従来の防音壁用吸音構造体は、低周波域から高
周波域までの幅広い周波数領域にわたつてまんべ
んなく吸音させるために、吸音材と遮音材との間
に空気層を形成しているが、吸音材の端部のみを
遮音材に支持させた構造としているため、風圧等
に対する機械的強度や車輪により撥ね飛ばされる
小石等の物体の衝突に対する衝撃強度が弱い欠点
があつた。また吸音材を厚くすれば風圧等に対す
る強度は向上するが、コスト高となるうえに衝撃
強度はそれほど改善されず、物体の衝突によつて
割れて飛散したり脱落する欠点は解決できなかつ
た。更にまた、耐衝撃性を向上させるために吸音
材を遮音材に密着させると、低周波域の吸音性能
が低下する欠点があつた。
（考案が解決しようとする問題点）
本考案は上記のような従来の問題点を解決し
て、風圧等に対する強度及び耐衝撃性に優れ、し
かも広い周波数域にわたり優れた吸音性能を示す
防音壁用吸音構造体を目的として完成されたもの
である。
（問題点を解決するための手段）
本考案は、陶磁器粒子や軽量骨材を釉薬や接着
材で結合一体化した材質よりなり、表裏に連通す
る無数の細孔を持ち、その流れ抵抗が100〜
1500N・Ｓ／m3である多孔質吸音材の背面に、開
孔率が３〜50％である孔明板を一体的に密着させ
たことを特徴とするものである。
本考案において多孔質吸音材としては、陶磁器
粒子、軽量骨材を釉薬等と混合し焼成したもの、
あるいはこれらを硅酸ソーダ、セメント等の無機
系またはポリエステル樹脂等の有機系の接着剤に
より結合一体化されたものなどの材質の多孔質吸
音材を用いることができる。またその形状は例え
ば100×100×５mm程度のものから500×500×30mm
程度のものまで各種の大きさや肉厚の板状体とす
ることができ、気孔率30〜90％、嵩比重0.2〜1.5
程度のものが普通であるがこれに限定されるもの
ではない。しかしその流れ抵抗は、後述するデー
タに示されるように100〜1500N・Ｓ／m3の範囲
にあるものとしておく必要がある。また本考案に
おいて孔明板としては、石綿スレート、石膏ボー
ド、GRC、FRP合板等の無機質や有機質のもの
を用いることができ、孔形状は円形、楕円形、正
方形、長方形等の任意の形状でよく、また厚さ方
向の断面形状もストレート形、ジグザグ形、テー
パ形等の任意の形状を持たせることができる。肉
厚は例えば３〜10mm程度、孔の大きさ３〜20mm、
孔のピツチ10〜30mm程度とするのが一般的である
がこれに限定されるものではない。しかし開孔率
は、後述するデータに示されるように３〜50％の
範囲にあるものとしておく必要がある。このよう
な多孔質吸音材と孔明板とは、音源側に多孔質吸
音材が面するように、接着材、ビス、釘等によ
り、あるいは加熱融着法により一体的に密着させ
る。耐衝撃性を向上させるためには接着あるいは
融着法によることが好ましい。また全面接着でも
部分接着でもよいが、接着剤による場合には開孔
を接着剤が塞ぐことのないようにしておく必要が
ある。
本考案の防音壁用吸音構造体は、予めパネル状
に成形しておいてもよく、あるいは施工現場にお
いて多孔質吸音材と孔明板とを密着一体化させて
もよい。第１図は多孔質吸音材１の背面に接着材
２により孔明板３を密着させたパネル状の吸音構
造体を、図示を略した遮音壁の前面にスタツド４
等により組立てられた下地にビス５を用いて取付
けた例を示す。また第２図は、図示を略した遮音
壁の前面にスタツド４により下地を組立てたうえ
その表面にビス等により孔明板３を取付け、その
表面に接着剤２により多孔質吸音材１を貼付けた
例を示すものである。
（作用）
このように構成された本考案の防音壁用吸音構
造体は、陶磁器粒子や軽量骨材を釉薬や接着材で
結合一体化した材質よりなる多孔質吸音材１の背
面を孔明板３によつて全面的に支持させてあるの
で、風圧等に対する機械的強度が大きく、また耐
衝撃性にも優れたものである。また本考案におい
ては多孔質吸音材１として流れ抵抗が100〜
1500N・Ｓ／m3の材質のものを選定し、孔明板３
として開孔率が３〜50％のものを選定したので、
音源から入射した音波は多孔質吸音材１を通過す
る間に減衰されたうえ孔明板３を通過して背面へ
抜け、次の実施例のデータからも明らかにように
背面の遮音壁によつて効果的に遮音されることと
なる。なお多孔質吸音材１の流れ抵抗が100N・
Ｓ／m3未満であると音波が容易に貫通するため吸
音性能が低下し、逆に1500N・Ｓ／m3を上まわる
と音波が多孔質吸音材１の表面付近で反射され易
くなるためやはり吸音性能が低下する。また孔明
板３の開孔率が３％を下まわると多孔質吸音材１
を通過した音波が孔明板３の表面で反射される確
率が高くなり、多孔質吸音材１の厚さ分の吸音効
果しか得られなくなるため吸音性能が低下し、逆
に50％を越えると強度や耐衝撃性が低下するので
好ましくない。
なお、本考案の防音壁用吸音構造体は道路用防
音壁に使用できるほか、鉄道用や建物用の防音壁
として使用することもできる。
（実施例）
陶磁器粒子と軽量骨材との混合物を釉薬で焼結
した厚さ10mmの多孔質吸音材１と、厚さ10mmの繊
維混入セメント板にスリツト孔を形成した孔明板
３とを接着材２で一体的に密着してパネル状の吸
音構造体とし、これを第３図に示すように厚さ50
mmの遮音壁６の前面に背後空気層７を60mmとして
取付けた。多孔質吸音材１の流れ抵抗を一定と
し、孔明板３の開孔率を変化させて曲げ強度、耐
衝撃性、垂直入射吸音率（100〜2000Hz平均）を
測定した結果を第１表に示した。本考案の範囲内
にあるNo.２〜No.７のものは優れた特性を示すこと
が分かる。
次に孔明板３の開孔率を一定として、多孔質吸
音材１の流れ抵抗を変化させた例を第２表に示し
た。本考案の範囲内にあるNo.10〜No.12のものは優
れた吸音特性を示すことが分かる。なおNo.14とNo.
15とは孔明板を持たない従来品である。また第４
図のグラフに、主要なものの吸音率の周波数特性
を示した。
(Industrial Application Field) The present invention relates to a sound absorbing structure for a soundproof wall suitable for a soundproof wall for roads and the like. (Prior art) Conventional sound-absorbing structures for soundproof walls form an air layer between sound-absorbing materials and sound-insulating materials in order to absorb sound evenly over a wide frequency range from low frequencies to high frequencies. However, because the structure is such that only the ends of the sound absorbing material are supported by the sound insulating material, the mechanical strength against wind pressure, etc., and the impact strength against collisions with objects such as pebbles thrown by the wheels are weak. In addition, making the sound absorbing material thicker improves its strength against wind pressure, etc., but it increases the cost and does not significantly improve the impact strength, and does not solve the problem of cracking, scattering, or falling off when objects collide. Furthermore, when a sound absorbing material is brought into close contact with a sound insulating material in order to improve impact resistance, there is a drawback that the sound absorbing performance in a low frequency range decreases. (Problems to be solved by the invention) The present invention solves the above-mentioned conventional problems and creates a soundproof wall that has excellent strength and impact resistance against wind pressure, etc., and also exhibits excellent sound absorption performance over a wide frequency range. It was completed for the purpose of sound absorbing structure. (Means for solving the problem) The present invention is made of a material made by combining ceramic particles and lightweight aggregate with glaze or adhesive, and has countless pores that communicate with each other on the front and back sides, and its flow resistance is 100%. ~
It is characterized in that a perforated plate with a porosity of 3 to 50% is integrally attached to the back side of a porous sound absorbing material with a capacity of 1500N·S/m 3 . In the present invention, porous sound absorbing materials include ceramic particles, lightweight aggregate mixed with glaze, etc., and fired;
Alternatively, it is possible to use a porous sound-absorbing material made of these materials bonded together with an inorganic adhesive such as sodium silicate or cement, or an organic adhesive such as polyester resin. In addition, the shape ranges from about 100 x 100 x 5 mm to 500 x 500 x 30 mm.
It can be made into plates of various sizes and wall thicknesses, with a porosity of 30 to 90% and a bulk specific gravity of 0.2 to 1.5.
It is normal to have a certain degree, but it is not limited to this. However, the flow resistance must be in the range of 100 to 1500 N·S/m 3 as shown in the data described below. In addition, in the present invention, as the perforated board, inorganic or organic materials such as asbestos slate, gypsum board, GRC, FRP plywood, etc. can be used, and the hole shape may be any shape such as circular, oval, square, or rectangular. Further, the cross-sectional shape in the thickness direction can be any shape such as a straight shape, a zigzag shape, or a tapered shape. For example, the wall thickness is about 3 to 10 mm, the hole size is 3 to 20 mm,
Although the hole pitch is generally about 10 to 30 mm, it is not limited to this. However, the porosity needs to be in the range of 3 to 50%, as shown in the data described below. Such a porous sound-absorbing material and a perforated plate are integrally adhered to each other by adhesive, screws, nails, etc., or by a heat-fusion method, so that the porous sound-absorbing material faces the sound source side. In order to improve impact resistance, it is preferable to use adhesive or fusion methods. Further, the adhesive may be attached entirely or partially, but if adhesive is used, it is necessary to ensure that the adhesive does not block the openings. The sound absorbing structure for a soundproof wall of the present invention may be formed into a panel shape in advance, or the porous sound absorbing material and the perforated plate may be closely integrated at the construction site. Figure 1 shows a panel-shaped sound absorbing structure in which a perforated plate 3 is adhered to the back surface of a porous sound absorbing material 1 using an adhesive 2, and a stud 4 is attached to the front surface of a sound insulating wall (not shown).
An example is shown in which screws 5 are used to attach the base plate to a base assembled by the above method. FIG. 2 shows an example in which a base is assembled with studs 4 on the front surface of a sound insulating wall (not shown), a perforated plate 3 is attached to the surface with screws, etc., and a porous sound absorbing material 1 is pasted on the surface with adhesive 2. This shows that. (Function) The sound-absorbing structure for a sound-proof wall of the present invention configured as described above has a porous sound-absorbing material 1 made of a material in which ceramic particles and lightweight aggregate are combined and integrated with a glaze or an adhesive. Since it is fully supported by the fins, it has high mechanical strength against wind pressure and the like, and also has excellent impact resistance. In addition, in this invention, the porous sound absorbing material 1 has a flow resistance of 100~
Select a material of 1500N・S/m 3 and use perforated plate 3.
We selected one with a porosity of 3 to 50%,
The sound waves incident from the sound source are attenuated while passing through the porous sound-absorbing material 1, and then pass through the perforated plate 3 to the back side, and as is clear from the data of the next example, the sound insulation wall on the back side is effective. This will result in sound insulation. Note that the flow resistance of the porous sound absorbing material 1 is 100N.
If it is less than S/m 3 , sound waves will easily penetrate, resulting in poor sound absorption performance, while if it exceeds 1500N・S/m 3 , sound waves will be more likely to be reflected near the surface of the porous sound-absorbing material 1, so as expected. Sound absorption performance decreases. In addition, if the porosity of the perforated plate 3 is less than 3%, the porous sound absorbing material 1
There is a high probability that the sound waves that have passed through the perforated plate 3 will be reflected on the surface of the perforated plate 3, and the sound absorption effect will be limited to the thickness of the porous sound absorbing material 1, resulting in a decrease in sound absorption performance.On the other hand, if it exceeds 50%, the strength This is not preferable because it lowers impact resistance and impact resistance. The sound-absorbing structure for soundproof walls of the present invention can be used not only as soundproof walls for roads, but also for railways and buildings. (Example) A porous sound absorbing material 1 with a thickness of 10 mm made by sintering a mixture of ceramic particles and lightweight aggregate with a glaze and a perforated plate 3 with slits formed in a cement board mixed with fibers and a thickness of 10 mm are bonded together. The material 2 is integrally adhered to form a panel-like sound absorbing structure, which has a thickness of 50 mm as shown in Figure 3.
A rear air layer 7 of 60 mm was installed in front of a sound insulating wall 6 of 60 mm. Table 1 shows the results of measuring bending strength, impact resistance, and normal incidence sound absorption coefficient (100 to 2000 Hz average) while keeping the flow resistance of the porous sound absorbing material 1 constant and varying the porosity of the perforated plate 3. Ta. It can be seen that Nos. 2 to 7, which fall within the scope of the present invention, exhibit excellent properties. Next, Table 2 shows an example in which the flow resistance of the porous sound absorbing material 1 was varied while keeping the porosity of the perforated plate 3 constant. It can be seen that samples No. 10 to No. 12, which fall within the scope of the present invention, exhibit excellent sound absorption properties. Furthermore, No.14 and No.
15 is a conventional product that does not have a perforated plate. Also the fourth
The graph in the figure shows the frequency characteristics of the main sound absorption coefficients.
【表】【table】
【表】
（考案の効果）
本考案は以上の説明からも明らかなように、機
械的強度、衝撃強度が大であること、吸音特性に
優れること等の利点があるうえに、吸音材の表面
に金物が露出せず耐候性に優れること、製造コス
トが安価であること等の利点をも有するものであ
り、その実用的価値は極めて大きいものである。[Table] (Effects of the invention) As is clear from the above explanation, this invention has advantages such as high mechanical strength, high impact strength, and excellent sound absorption properties. It also has the advantage of being excellent in weather resistance, with no metal parts exposed, and being inexpensive to manufacture, so its practical value is extremely great.
第１図、第２図は本考案の防音壁用吸音構造体
の使用例を示す一部切欠斜視図、第３図は実施例
に用いた吸音構造体を示す一部切欠斜視図、第４
図は実施例のものの吸音率の周波数特性図であ
る。
１……多孔質吸音材、３……孔明板。
1 and 2 are partially cutaway perspective views showing usage examples of the sound absorbing structure for soundproof walls of the present invention, FIG. 3 is a partially cutaway perspective view showing the sound absorbing structure used in the example, and FIG.
The figure is a frequency characteristic diagram of the sound absorption coefficient of the example. 1... Porous sound absorbing material, 3... Perforated board.
Claims (1)
体化した材質よりなり、表裏に連通する無数の細
孔を持ち、その流れ抵抗が100〜1500N・Ｓ／m3
である多孔質吸音材１の背面に、開孔率が３〜50
％である孔明板３を一体的に密着させたことを特
徴とする防音壁用吸音構造体。 It is made of a material made by combining ceramic particles and lightweight aggregate with glaze or adhesive, and has countless pores that communicate on the front and back sides, and its flow resistance is 100 to 1500 N・S/m 3
The back surface of the porous sound absorbing material 1 has a porosity of 3 to 50.
A sound-absorbing structure for a soundproof wall, characterized in that perforated plates 3 of 10% are integrally adhered to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987088891U JPH0521119Y2 (en) | 1987-06-09 | 1987-06-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987088891U JPH0521119Y2 (en) | 1987-06-09 | 1987-06-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63198099U JPS63198099U (en) | 1988-12-20 |
| JPH0521119Y2 true JPH0521119Y2 (en) | 1993-05-31 |
Family
ID=30947386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987088891U Expired - Lifetime JPH0521119Y2 (en) | 1987-06-09 | 1987-06-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0521119Y2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8905651B2 (en) | 2012-01-31 | 2014-12-09 | Fci | Dismountable optical coupling device |
| USD748063S1 (en) | 2012-04-13 | 2016-01-26 | Fci Americas Technology Llc | Electrical ground shield |
| US9257778B2 (en) | 2012-04-13 | 2016-02-09 | Fci Americas Technology | High speed electrical connector |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3547587B2 (en) * | 1997-06-02 | 2004-07-28 | クリオン株式会社 | Sound absorbing wall structure |
| JPH11342554A (en) * | 1998-06-02 | 1999-12-14 | Mitsubishi Kagaku Form Plastic Kk | Composite laminate and acoustic panel |
| JP2003295867A (en) * | 2002-02-01 | 2003-10-15 | Ngk Insulators Ltd | Sound absorption structure |
| JP2007291834A (en) * | 2006-03-31 | 2007-11-08 | Yamaha Corp | Sound absorbing panel and method of manufacturing sound absorbing panel |
| SE533764C2 (en) * | 2009-05-04 | 2010-12-28 | Bloc Internat Ab Z | Noise barrier for attenuating interfering traffic noise |
| JP2012082631A (en) * | 2010-10-13 | 2012-04-26 | Japan Pile Corp | Soundproof panel |
| CN114991329A (en) * | 2015-12-21 | 2022-09-02 | 可耐福石膏两合公司 | Acoustic dry wall board |
| JP6929532B2 (en) * | 2016-04-05 | 2021-09-01 | 株式会社Ｓｋテック | Soundproof panel |
| KR102111258B1 (en) * | 2018-05-10 | 2020-05-15 | 서울과학기술대학교산학협력단 | Acoustic pannel assembly to improve sound absorption performance of low frequency band using a band resonance panel and acoustic pannel assdmbly construction method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5420470Y2 (en) * | 1972-12-11 | 1979-07-24 |
-
1987
- 1987-06-09 JP JP1987088891U patent/JPH0521119Y2/ja not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8905651B2 (en) | 2012-01-31 | 2014-12-09 | Fci | Dismountable optical coupling device |
| USD748063S1 (en) | 2012-04-13 | 2016-01-26 | Fci Americas Technology Llc | Electrical ground shield |
| US9257778B2 (en) | 2012-04-13 | 2016-02-09 | Fci Americas Technology | High speed electrical connector |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63198099U (en) | 1988-12-20 |
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