JPH09268526A - Sound-absorptive structure - Google Patents
Sound-absorptive structureInfo
- Publication number
- JPH09268526A JPH09268526A JP8081088A JP8108896A JPH09268526A JP H09268526 A JPH09268526 A JP H09268526A JP 8081088 A JP8081088 A JP 8081088A JP 8108896 A JP8108896 A JP 8108896A JP H09268526 A JPH09268526 A JP H09268526A
- Authority
- JP
- Japan
- Prior art keywords
- titanium dioxide
- sound
- sound absorbing
- hollow body
- outer layer
- 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.)
- Pending
Links
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 147
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 72
- 239000011358 absorbing material Substances 0.000 claims description 36
- 238000009413 insulation Methods 0.000 claims description 7
- 239000003463 adsorbent Substances 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 78
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 abstract description 26
- 229910052815 sulfur oxide Inorganic materials 0.000 abstract description 24
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 18
- 239000000463 material Substances 0.000 abstract description 12
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract description 9
- 239000003344 environmental pollutant Substances 0.000 abstract description 9
- 229910017604 nitric acid Inorganic materials 0.000 abstract description 9
- 230000001590 oxidative effect Effects 0.000 abstract description 9
- 231100000719 pollutant Toxicity 0.000 abstract description 9
- 239000007789 gas Substances 0.000 abstract description 5
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical class [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 44
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 239000000843 powder Substances 0.000 description 9
- 239000011230 binding agent Substances 0.000 description 7
- 230000004913 activation Effects 0.000 description 6
- 239000000835 fiber Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000006261 foam material Substances 0.000 description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000011491 glass wool Substances 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 239000006262 metallic foam Substances 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 208000023504 respiratory system disease Diseases 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、主として、車両等
の走行に伴う騒音を遮音、吸音するために、高速道路や
鉄道の沿線等に沿って設置される防音壁として、また橋
梁や高架道路橋、堀割、半地下道路等の構造体の下面部
や壁面、天井面等に取付けられる吸音性構造体に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mainly used as a soundproof wall installed along a highway or along a railroad, for the purpose of sound insulation and absorption of noise caused by running of a vehicle, bridges and elevated roads. The present invention relates to a sound absorbing structure that is attached to the lower surface, wall surface, ceiling surface, etc. of structures such as bridges, trenches, and semi-underground roads.
【０００２】[0002]
【従来の技術】従来、この種の吸音性構造体としては設
置される場所に応じて数々の形態があり、例えば高速道
路や鉄道の沿線等に沿って防音壁として設置されるよう
になされたものとしては、多数の孔が形成された前面側
の有孔板と、裏面側に配設された遮音板とからなる中空
パネル体内に吸音材が内装された吸音性構造体があり、
また橋梁や高架道路橋、堀割、半地下道路等の構造体の
下面部に設置されるようになされたものとしては、特開
平４−１７４１０９号公報に記載される如く、吸音材の
両面をパンチングメタル等の有孔板で挟んで圧縮成形す
ることにより筒状とした吸音性構造体、およびその筒状
の内部にさらに吸音材を挿入した吸音性構造体等があ
り、さらに構造体の壁面や天井面等に直接取付けられる
ようになされたものとしては、特開昭６３−３００１５
１号公報に記載される如く、エキスパンドメタル等の有
孔板に吸音材が積層された板状の吸音性構造体等があ
る。2. Description of the Related Art Conventionally, there have been various forms of this type of sound absorbing structure depending on the place where it is installed. For example, it has been designed to be installed as a soundproof wall along a highway or along a railway. As a thing, there is a sound absorbing structure in which a sound absorbing material is installed in a hollow panel body consisting of a perforated plate on the front side where a large number of holes are formed and a sound insulating plate arranged on the back side,
Further, as disclosed in Japanese Patent Laid-Open No. 4-174109, the sound absorbing material is punched on both sides as the one installed on the lower surface of a structure such as a bridge, an elevated road bridge, a trench, a semi-underground road. There are a sound absorbing structure that is made into a tubular shape by sandwiching it with a perforated plate such as metal, and a sound absorbing structure in which a sound absorbing material is further inserted inside the tubular shape. Japanese Patent Application Laid-Open No. 63-30015 discloses a device which can be directly attached to a ceiling surface or the like.
As described in Japanese Patent Publication No. 1, there is a plate-like sound absorbing structure in which a sound absorbing material is laminated on a perforated plate such as expanded metal.
【０００３】そしてこれらの吸音性構造体に用いられる
吸音材としては、一般にはグラスウールやロックウール
からなるもの、アルミニウム等の金属繊維からなるも
の、金属繊維をバインダーを介して結合させたもの、金
属粉末やセラミック粉末、金属短繊維等を焼結した焼結
材からなるもの、また金属発泡材や有機発泡材、無機発
泡材等の発泡材からなるもの等が用いられている。The sound absorbing material used in these sound absorbing structures is generally made of glass wool or rock wool, metal fibers such as aluminum, metal fibers bonded through a binder, or metal. A powder, a ceramic powder, a sintered material obtained by sintering a metal short fiber, or a foamed material such as a metal foam material, an organic foam material, or an inorganic foam material is used.
【０００４】[0004]
【発明が解決しようとする課題】上記の如き従来の吸音
性構造体は、それが車両等の走行に伴う騒音を発する所
に設置されることにより、それなりの騒音公害を低減で
きるものであるが、近年車両等の走行に伴う公害として
は、他に車両等の排気ガス等から排出される窒素酸化物
や硫黄酸化物等の汚染物質による環境汚染の問題が指摘
されている。特に窒素酸化物は、人体に呼吸器障害を誘
発するといわれ、また太陽紫外線、炭化水素と関係して
オキシダントを生成し、いわゆる光化学スモッグを引き
起こすものである。しかしながら上記の如く、従来の吸
音性構造体は騒音公害の低減のみを目的としたものであ
り、窒素酸化物や硫黄酸化物等の汚染物質による環境汚
染については何ら効果がないものであった。The conventional sound absorbing structure as described above is capable of reducing noise pollution to some extent by being installed in a place where it emits noise accompanying traveling of a vehicle or the like. In recent years, as pollution caused by traveling of vehicles and the like, the problem of environmental pollution due to pollutants such as nitrogen oxides and sulfur oxides emitted from exhaust gases of vehicles and the like has been pointed out. In particular, nitrogen oxides are said to induce respiratory disorders in the human body, produce oxidants in association with solar ultraviolet rays and hydrocarbons, and cause so-called photochemical smog. However, as described above, the conventional sound absorbing structure has only the purpose of reducing noise pollution, and has no effect on environmental pollution due to pollutants such as nitrogen oxides and sulfur oxides.
【０００５】そこで本発明は上記の如き問題を解決し、
騒音の低減を図ると共に車両等の排気ガス等から排出さ
れた空気中の窒素酸化物や硫黄酸化物等の汚染物質の低
減も図ることのできる吸音性構造体を提供せんとするも
のである。Therefore, the present invention solves the above-mentioned problems,
An object of the present invention is to provide a sound absorbing structure capable of reducing noise and reducing pollutants such as nitrogen oxides and sulfur oxides in the air discharged from exhaust gas of vehicles and the like.
【０００６】[0006]
【課題を解決するための手段】本発明者は、吸音性構造
体において、如何にして騒音の低減を図ると共に窒素酸
化物や硫黄酸化物等の低減も図るかを鋭意研究した結
果、上記の如く吸音材を用いることにより、騒音の低減
を図ることができること、また二酸化チタンは紫外光を
照射させると活性化され、その活性化により強い酸化力
を発現するものであること等を知得し、表面に二酸化チ
タンを含む外層が形成された多数の開口部を有する中空
体内に、吸音材を内装し、この二酸化チタンに紫外光を
照射させるようにすれば、車両等の走行に伴う騒音は、
前記開口部より中空体内に入射されて吸音材により吸音
されると共に、車両等の走行に伴う風圧によって窒素酸
化物や硫黄酸化物等の汚染物質が多く存在する地表近く
の空気が巻き上げられて中空体の表面に運ばれ、これに
よって窒素酸化物や硫黄酸化物等が外層の二酸化チタン
に触れることにより、二酸化チタンの活性化による強い
酸化力により窒素酸化物や硫黄酸化物等が硝酸や硫酸等
に酸化されて効果的に除去されることを見い出し、本発
明を完成するに至った。Means for Solving the Problems The inventors of the present invention have earnestly studied how to reduce noises and nitrogen oxides and sulfur oxides in a sound absorbing structure. It is known that noise can be reduced by using such a sound-absorbing material, and that titanium dioxide is activated when exposed to ultraviolet light and exhibits a strong oxidizing power by its activation. If a sound absorbing material is placed inside a hollow body having a large number of openings in which an outer layer containing titanium dioxide is formed, and this titanium dioxide is irradiated with ultraviolet light, the noise caused by running of a vehicle etc. ,
The air near the surface where a large amount of pollutants such as nitrogen oxides and sulfur oxides exist due to the wind pressure that accompanies the traveling of the vehicle, etc. It is carried to the surface of the body, where it causes nitrogen oxides and sulfur oxides to come into contact with the outer layer of titanium dioxide, and due to the strong oxidizing power of titanium dioxide activation, nitrogen oxides and sulfur oxides are converted into nitric acid, sulfuric acid, etc. It has been found that the present invention is effectively oxidized and removed to complete the present invention.
【０００７】すなわち本発明に係る吸音性構造体は、多
数の開口部を有する中空体内の空間部に吸音材が内装さ
れ、前記中空体の表面の少なくとも一部に二酸化チタン
を含む外層が形成され、該二酸化チタンに紫外光が照射
されるようになされたことを特徴とするものである。That is, in the sound-absorbing structure according to the present invention, a sound-absorbing material is provided in a space inside a hollow body having a large number of openings, and an outer layer containing titanium dioxide is formed on at least a part of the surface of the hollow body. The titanium dioxide is characterized by being irradiated with ultraviolet light.
【０００８】本発明によれば、車両等の走行に伴う騒音
は開口部より中空体内に入射されて吸音材により吸音さ
れる。また車両等の排気ガス等から排出された窒素酸化
物や硫黄酸化物等の汚染物質が多く存在する地表近くの
空気は、車両等の走行に伴う風圧によって巻き上げられ
て中空体の表面に運ばれ、一方紫外光の照射によって中
空体の表面に形成された外層の二酸化チタンが活性化さ
れており、この活性化された二酸化チタンに、巻き上げ
られた空気中の窒素酸化物や硫黄酸化物等が吸着されれ
ば、また空気中を拡散したこれらの窒素酸化物や硫黄酸
化物等が触れれば、二酸化チタンの活性化による強い酸
化力と水分の存在によって硝酸や硫酸等に酸化されて外
層上に捕捉され、効果的に空気中から除去される。According to the present invention, the noise caused by the traveling of the vehicle or the like enters the hollow body through the opening and is absorbed by the sound absorbing material. Air near the ground surface, which contains a large amount of pollutants such as nitrogen oxides and sulfur oxides emitted from the exhaust gas of vehicles, etc., is taken up by the wind pressure associated with the traveling of vehicles, etc., and carried to the surface of the hollow body. On the other hand, the outer layer of titanium dioxide formed on the surface of the hollow body is activated by the irradiation of ultraviolet light, and the activated titanium dioxide contains nitrogen oxides and sulfur oxides in the air that has been rolled up. If they are adsorbed, or if these nitrogen oxides or sulfur oxides that have diffused in the air come into contact, they will be oxidized to nitric acid or sulfuric acid due to the strong oxidizing power due to the activation of titanium dioxide and the presence of water, and then they will be oxidized on the outer layer. Trapped in the air and effectively removed from the air.
【０００９】前記中空体の表面に形成された外層に含ま
れる二酸化チタンはルチル型でもよいが、活性の高さか
らアナターゼ型のものが好ましく、この二酸化チタンに
波長領域が３００〜４００ｎｍの紫外光を照射すること
によって活性化され、その活性化により強い酸化力が発
現されて、二酸化チタンの表面に接する空気中の窒素酸
化物や硫黄酸化物等が水の存在によって硝酸や硫酸等に
酸化されて捕捉除去される。この二酸化チタンに効率よ
く窒素酸化物や硫黄酸化物等を除去させるためには、二
酸化チタンができるだけ空気に触れるように、接触面積
をできるだけ大きくすることが好ましく、従って表面積
の大きい状態、すなわち粒子径０．００５〜０．００７
μｍ程度の超微粒子状や膜厚０．１〜０．８μｍ程度の
薄膜状で外層に含まれているのが好ましい。また窒素酸
化物や硫黄酸化物等が酸化されて硝酸や硫酸等として捕
捉された汚染物質が外層に蓄積されると、二酸化チタン
の活性化が阻害されるため、外層の表面を降雨を利用し
て洗浄させるか、別途洗浄装置を付設して定期的に洗浄
するのが好ましい。The titanium dioxide contained in the outer layer formed on the surface of the hollow body may be of rutile type, but is preferably of anatase type because of its high activity, and this titanium dioxide has an ultraviolet light with a wavelength range of 300 to 400 nm. Is activated by irradiating the surface of the titanium dioxide with a strong oxidizing power, and the nitrogen oxides and sulfur oxides in the air contacting the surface of titanium dioxide are oxidized to nitric acid and sulfuric acid by the presence of water. Are captured and removed. In order to effectively remove nitrogen oxides and sulfur oxides from this titanium dioxide, it is preferable to make the contact area as large as possible so that the titanium dioxide comes into contact with air as much as possible. 0.005-0.007
It is preferable that the outer layer is contained in the form of ultrafine particles of about μm or a thin film of about 0.1 to 0.8 μm in thickness. If nitrogen oxides, sulfur oxides, etc. are oxidized and contaminants trapped as nitric acid, sulfuric acid, etc. accumulate in the outer layer, activation of titanium dioxide is hindered. It is preferable to perform the cleaning by using a cleaning device or a separate cleaning device attached to perform cleaning regularly.
【００１０】外層は、前記の如き二酸化チタンのみから
形成されていてもよく、二酸化チタンに加えて他の材料
が含まれていてもよく、またふっ素系合成樹脂等のバイ
ンダー中に分散されていてもよい。他の材料を含む場合
は、二酸化チタンと共に吸着剤が含まれているのが好ま
しい。このようになされていると吸着剤に窒素酸化物や
硫黄酸化物等が外層に吸着されると共に、その吸着され
た汚染物質は除去が可能な状態まで、すなわち二酸化チ
タンにより硝酸や硫酸等に酸化されるまで脱着されるこ
とが防止される。吸着剤としては、活性炭、ゼオライト
等が一般に使用される。なお二酸化チタンを含む外層
は、中空体の表面の全面に形成されていてもよいし、一
部に形成されていてもよい。The outer layer may be formed only of titanium dioxide as described above, may contain other materials in addition to titanium dioxide, and may be dispersed in a binder such as a fluorine-based synthetic resin. Good. If other materials are included, it is preferred that the adsorbent be included with the titanium dioxide. With this method, the adsorbent adsorbs nitrogen oxides and sulfur oxides to the outer layer, and the adsorbed pollutants are oxidized to nitric acid, sulfuric acid, etc. until titanium oxide can be removed. It is prevented from being detached until it is removed. As the adsorbent, activated carbon, zeolite or the like is generally used. The outer layer containing titanium dioxide may be formed on the entire surface of the hollow body or may be formed on a part thereof.
【００１１】二酸化チタンを含む外層を中空体の表面に
形成するには、二酸化チタンまたは二酸化チタンと吸着
剤等の他の材料とからなる混合物、または二酸化チタン
等をフッ素系合成樹脂等のバインダー中に分散させた混
合物等を適宜方法で付着させればよく、この方法として
は、二酸化チタンや二酸化チタンの混合物等の粉末を溶
融させて吹き付ける溶射法、化学反応を介して析出させ
るＣＶＤ（化学的製膜法）、スプレーにて吹き付けるス
プレー法、スパッタ蒸発させて沈着させるスパッタ蒸着
法、真空蒸着、塗装等が適用されるが、特に限定される
ものではなく、少なくとも外層に含まれた二酸化チタン
が表面に露出され、その露出された二酸化チタンに紫外
光が照射されると活性化されるようになされていればよ
い。また二酸化チタン等をバインダー中に分散させた混
合物から外層を形成するには、バインダーとしては、フ
ッ素系やポリエステル系等の合成樹脂、セラミック系塗
料の如き無機塗料のように二酸化チタンの活性による強
い酸化力に侵されないか、または侵されにくいバインダ
ーを使用するのが好ましく、さらに中空体が金属から形
成される場合は、活性化された二酸化チタンにより発生
した硝酸や硫酸等で腐食されないように、その表面に耐
酸性を有する保護層を形成し、その上に二酸化チタンを
含む外層を形成するのが好ましい。この保護層として
は、耐酸性に極めて強いポリエステル系やフッ素系、ア
クリル系、ウレタン系等の有機系塗料、並びにセラミッ
ク系塗料、有機と無機のハイブリッド型塗料等を塗布す
ることによって、一般に形成されるが、前記材質等から
なるフイルム体を貼着することにより形成されていても
よい。この場合、金属としては前記理由から耐酸性に優
れたステンレス鋼を使用するのが好ましいが、軽量化か
らアルミニウム合金でもよく、また亜鉛鋼板等であって
もよい。To form an outer layer containing titanium dioxide on the surface of a hollow body, titanium dioxide or a mixture of titanium dioxide and another material such as an adsorbent, or titanium dioxide in a binder such as a fluorine-based synthetic resin is used. The mixture or the like dispersed in the above may be adhered by an appropriate method. This method includes a spraying method in which powder such as titanium dioxide or a mixture of titanium dioxide is melted and sprayed, and a CVD (chemical Film forming method), spray method of spraying, sputter vapor deposition method of depositing by evaporating sputter, vacuum vapor deposition, painting, etc. are applied, but are not particularly limited, and at least titanium dioxide contained in the outer layer is used. It suffices that the titanium dioxide exposed on the surface is activated when the exposed titanium dioxide is irradiated with ultraviolet light. Further, in order to form the outer layer from a mixture in which titanium dioxide or the like is dispersed in a binder, the binder is strong due to the activity of titanium dioxide, such as fluorine-based or polyester-based synthetic resins, and inorganic coatings such as ceramic coatings. It is preferable to use a binder that is not attacked by oxidative power or is resistant to attack, and when the hollow body is formed of a metal, so as not to be corroded by nitric acid, sulfuric acid, etc. generated by activated titanium dioxide, It is preferable that a protective layer having acid resistance is formed on the surface thereof, and an outer layer containing titanium dioxide is formed thereon. This protective layer is generally formed by applying polyester-based, fluorine-based, acrylic-based, urethane-based, or other organic paints having extremely strong acid resistance, as well as ceramic-based paints and organic-inorganic hybrid-type paints. However, it may be formed by adhering a film body made of the above material or the like. In this case, as the metal, it is preferable to use stainless steel having excellent acid resistance for the above-mentioned reason, but an aluminum alloy or a zinc steel plate may be used because it is lightweight.
【００１２】また二酸化チタンに紫外光が照射されるよ
うになされているとは、この二酸化チタンに紫外光を照
射させることにより、二酸化チタンを活性化させて強い
酸化力を発現させるためである。この二酸化チタンを活
性化させる光の波長領域は３００〜４００ｎｍの紫外光
であるが、この紫外光は太陽光に多く含まれ、また水銀
灯やブラックライト等の光にも含まれているため、二酸
化チタンを含む外層に太陽光が照射されるようになされ
ていてもよいし、水銀灯やブラックライト等の紫外光を
多く含む人工光源が付設され、その光が外層に照射され
るようになされていてもよい。Further, the reason why the titanium dioxide is irradiated with ultraviolet light is that the titanium dioxide is activated by irradiating the titanium dioxide with ultraviolet light to develop a strong oxidizing power. The wavelength range of the light that activates this titanium dioxide is ultraviolet light of 300 to 400 nm, but this ultraviolet light is contained in much sunlight and also in light from mercury lamps, black lights, etc. The outer layer containing titanium may be irradiated with sunlight, or an artificial light source containing a large amount of ultraviolet light such as a mercury lamp or a black light is attached, and the light is irradiated onto the outer layer. Good.
【００１３】次に、中空体内の空間部に内装される吸音
材としては、例えばグラスウールやロックウールからな
るもの、アルミニウム等の金属繊維の集積体からなるも
の、金属繊維をバインダーを介して結合させたもの、金
属粉末や粒子、セラミック粉末や粒子或いは金属短繊維
等を焼結した焼結材からなるもの、また金属発泡材や有
機発泡材、無機発泡材等の発泡材からなるもの、またフ
ライアッシュ粉末や焼成フライアッシュ粉末、粘土を溶
融噴霧して得られる粉末等の粉体とアルカリ金属珪酸塩
と水とからなる無機質硬化体等が適宜用いられる。なお
吸音材に二酸化チタンを担持させ、この二酸化チタンに
紫外光を照射させるようにすれば、外層の二酸化チタン
に加えてこの二酸化チタンでも窒素酸化物や硫黄酸化物
等を除去させることができる。Next, as the sound absorbing material to be installed in the space inside the hollow body, for example, glass wool or rock wool, an aggregate of metal fibers such as aluminum, or a metal fiber bonded through a binder. , A metal powder or particles, a ceramic powder or particles, or a sintered material obtained by sintering metal short fibers, or a foam material such as a metal foam material, an organic foam material, or an inorganic foam material, or a fly. As the ash powder, the calcined fly ash powder, a powder such as a powder obtained by melting and spraying clay, and an inorganic hardened body composed of an alkali metal silicate and water are appropriately used. If titanium dioxide is supported on the sound absorbing material and the titanium dioxide is irradiated with ultraviolet light, nitrogen oxide and sulfur oxide can be removed from the titanium dioxide in addition to titanium dioxide in the outer layer.
【００１４】前記の如く表面に二酸化チタンを含む外層
が形成された中空体は、音が内部に入射されるように多
数の開口部が形成されると共にその内部に前記吸音材が
内装される空間部が形成されたものであれば、形状は特
に限定されるものではなく、例えばパネル状でもよい
し、三角筒状、矩形筒状、台形筒状、扇形筒状、多角形
筒状、楕円形筒状等の筒状でもよい。In the hollow body having the outer layer containing titanium dioxide formed on the surface as described above, a large number of openings are formed so that sound can enter the interior, and the space in which the sound absorbing material is incorporated The shape is not particularly limited as long as the portion is formed, and may be, for example, a panel shape, a triangular cylinder shape, a rectangular cylinder shape, a trapezoidal cylinder shape, a fan shape cylinder shape, a polygonal cylinder shape, an oval shape. It may be a tubular shape such as a tubular shape.
【００１５】なお本発明が道路や鉄道の沿線等に沿って
それらの側縁に壁状に設置され、いわゆる防音壁等とし
て用いられる場合は、前記中空体はパネル状となされて
いるのが好ましい。すなわち中空体を、一方の面に多数
の開口部を有する有孔板を配し、他方の面に遮音板を配
して形成される中空パネル状とし、前記有孔板と遮音板
との間に形成された空間部に吸音材を内装すると共に、
この有孔板と遮音板との表面に、または有孔板の表面
に、または遮音板の表面に二酸化チタンを含む外層を形
成した吸音性構造体とすれば、前記外層の二酸化チタン
により窒素酸化物や硫黄酸化物等が除去され、また有孔
板の開口部より入射した音は吸音材により吸音されると
共に遮音板により遮音され、遮音板の背後から騒音が漏
れるのが防止される。なおこの場合、吸音材と遮音板と
の間に空気層を設けると、低周波領域の音が効果的に減
音されるので好ましい。When the present invention is installed in the shape of a wall on the side edges of a road or a railroad, and is used as a so-called soundproof wall, the hollow body is preferably in the form of a panel. . That is, the hollow body has a hollow panel shape formed by disposing a perforated plate having a large number of openings on one surface and a sound insulating plate on the other surface, and between the perforated plate and the sound insulating plate. The interior of the space formed by the sound absorbing material,
If a sound absorbing structure is formed by forming an outer layer containing titanium dioxide on the surface of the perforated plate and the sound insulating plate, or on the surface of the perforated plate or on the surface of the sound insulating plate, the titanium dioxide of the outer layer causes nitrogen oxidation. The substances and sulfur oxides are removed, and the sound incident from the opening of the perforated plate is absorbed by the sound absorbing material and is also insulated by the sound insulating plate, so that the noise is prevented from leaking from behind the sound insulating plate. In this case, it is preferable to provide an air layer between the sound absorbing material and the sound insulating plate because the sound in the low frequency region is effectively reduced.
【００１６】また走行車線と対向車線との間に壁状に設
置される防音壁等の如く、両側から入射してくる音を吸
音させる場合は、前記中空体を、中間に配した遮音板の
両面にそれぞれ空間部を存して多数の開口部を有する有
孔板を配して形成される中空パネル状とし、その中空体
のそれぞれの空間部に吸音材を内装すると共に、少なく
とも一方の有孔板の表面に二酸化チタンを含む外層を形
成した吸音性構造体とすれば、前記外層の二酸化チタン
により窒素酸化物や硫黄酸化物等が除去され、また両側
よりそれぞれの有孔板の開口部より入射した音はそれぞ
れの吸音材により吸音されると共に遮音板により遮音さ
れ、遮音板の背後からそれぞれ他方に騒音が漏れるのが
防止される。なおこの場合も、各吸音材と遮音板との間
に空気層を設けると、低周波領域の音が効果的に減音さ
れるので好ましい。Further, in the case of absorbing sound coming from both sides like a soundproof wall installed in a wall shape between the traveling lane and the oncoming lane, the hollow body of the sound insulating plate disposed in the middle is absorbed. A hollow panel is formed by arranging perforated plates each having a space on both sides and having a large number of openings, and a sound absorbing material is provided in each space of the hollow body, and at least one of the spaces is provided. If a sound absorbing structure is formed by forming an outer layer containing titanium dioxide on the surface of the perforated plate, the titanium dioxide in the outer layer removes nitrogen oxides and sulfur oxides, and the openings of the perforated plates from both sides. The more incident sound is absorbed by each sound absorbing material and is also sound-insulated by the sound insulating plate, so that the noise is prevented from leaking from the back of the sound insulating plate to the other. In this case as well, it is preferable to provide an air layer between each sound absorbing member and the sound insulating plate because the sound in the low frequency region is effectively reduced.
【００１７】さらに本発明が橋梁や高架道路橋、堀割、
半地下道路等の構造体の下面部等に設置される場合は、
中空体を、多数の開口部を有する有孔板が湾曲されて形
成される筒状とし、該中空体内の空間部に吸音材を内装
すると共に、有孔板の表面に二酸化チタンを含む外層を
形成した吸音性構造体とするのが好ましく、かようにな
されていると前記外層の二酸化チタンにより窒素酸化物
や硫黄酸化物等が除去され、また方向に関係なくあらゆ
る方向からの音が開口部から入射され、吸音材により吸
音される。かかる形態の吸音性構造体は、前記以外に、
例えば複数個壁状に積み重ねたり立設する等して防音壁
としても設置でき、また従来の防音壁の上端に横設する
ことにより、騒音の回り込みを防止させることができ
る。なお前記吸音材は中実状であってもよいし、中空状
であってもよく、また中空体と吸音材との間に空気層が
形成されていてもよい。なお吸音材が中空状になされて
いると、低周波領域の音が効果的に減音されるので好ま
しい。Furthermore, the present invention provides a bridge, an elevated road bridge, a moat split,
When installed on the lower surface of a structure such as a semi-underground road,
The hollow body is formed into a tubular shape formed by bending a perforated plate having a large number of openings, a sound absorbing material is provided in the space of the hollow body, and an outer layer containing titanium dioxide is provided on the surface of the perforated plate. It is preferable to use the formed sound absorbing structure. By doing so, nitrogen oxides and sulfur oxides are removed by the titanium dioxide of the outer layer, and sound from all directions regardless of direction is opened. Is made incident on and is absorbed by the sound absorbing material. The sound absorbing structure of this form, in addition to the above,
For example, it can be installed as a soundproof wall by stacking or standing up a plurality of walls, and it is possible to prevent noise from wrapping around by horizontally installing it on the upper end of a conventional soundproof wall. The sound absorbing material may be solid or hollow, and an air layer may be formed between the hollow body and the sound absorbing material. It is preferable that the sound absorbing material is hollow so that the sound in the low frequency region can be effectively reduced.
【００１８】[0018]
【発明の実施の形態】次に、本発明の実施の形態につい
て図面を参照し、具体的に説明する。すなわち図１は本
発明の一実施例を示す断面図であり、１は一方の面に多
数の開口部１１が形成された有孔板１２を配し、他方の
面に遮音板１３を配して形成された中空パネル状の中空
体であり、この有孔板１２と遮音板１３との間に形成さ
れた空間部１４に、遮音板１３との間に空気層２を存し
て吸音材３が内装され、さらに有孔板１２と遮音板１３
との表面に二酸化チタンを含む外層４が形成されてい
る。そして有孔板１２の開口部１１より騒音が中空体１
内に入射されると吸音材３により吸音され、また有孔板
１２と遮音板１３との表面に太陽光に照射されるように
なされており、その太陽光に含まれる紫外光により、有
孔板１２と遮音板１３との表面に形成された外層４の二
酸化チタンが活性化され、その活性化による酸化力で窒
素酸化物や硫黄酸化物等が硝酸や硫酸等に酸化されて除
去されると共に、この表面は降雨により洗浄されるよう
になされている。前記有孔板１２は軽量化のためにアル
ミニウム合金板から形成され、遮音板１３は遮音のため
に亜鉛鋼板から形成されている。なおこの実施例は、道
路や鉄道の沿線等に沿ってそれらの側縁に壁状に設置さ
れ、いわゆる防音壁として好適に用いられるものであ
る。Next, an embodiment of the present invention will be specifically described with reference to the drawings. That is, FIG. 1 is a cross-sectional view showing an embodiment of the present invention, in which 1 is a perforated plate 12 having a large number of openings 11 formed on one surface and a sound insulating plate 13 is arranged on the other surface. Is a hollow panel-shaped hollow body formed by a sound absorbing member having an air layer 2 between the sound insulating plate 13 and a space portion 14 formed between the perforated plate 12 and the sound insulating plate 13. 3 is installed inside, and a perforated plate 12 and a sound insulating plate 13 are further provided.
An outer layer 4 containing titanium dioxide is formed on the surfaces of and. The noise is emitted from the opening 11 of the perforated plate 12 into the hollow body 1.
When entering the inside, the sound absorbing material 3 absorbs sound, and the surfaces of the perforated plate 12 and the sound insulating plate 13 are irradiated with sunlight. The titanium dioxide of the outer layer 4 formed on the surfaces of the plate 12 and the sound insulating plate 13 is activated, and nitrogen oxide, sulfur oxide, etc. are oxidized and removed by nitric acid, sulfuric acid, etc. by the oxidizing power due to the activation. At the same time, this surface is designed to be washed by rainfall. The perforated plate 12 is formed of an aluminum alloy plate for weight reduction, and the sound insulation plate 13 is formed of a zinc steel plate for sound insulation. In addition, this embodiment is suitably installed as a so-called soundproof wall by being installed in a wall shape along the side edges of roads and railways.
【００１９】なお本実施例において、二酸化チタンを含
む外層４は有孔板１２または遮音板１３のみに形成され
ていてもよく、また外層４は二酸化チタンのみから形成
されていてもよいし、他の材料、例えば二酸化チタンと
共に吸着剤が含まれていてもよく、さらに上記した如き
保護層を介して外層４が形成されていてもよく、また吸
音材３にも二酸化チタンが担持され、該二酸化チタンに
紫外光が照射されるようになされていてもよい。また外
層４の二酸化チタンは、ブラックライト等の人工光源に
よる紫外光で照射されるようになされていてもよい。In this embodiment, the outer layer 4 containing titanium dioxide may be formed only on the perforated plate 12 or the sound insulating plate 13, and the outer layer 4 may be formed only on titanium dioxide. The material such as titanium dioxide may be contained together with an adsorbent, and the outer layer 4 may be formed via the protective layer as described above, and the sound absorbing material 3 also carries titanium dioxide. The titanium may be irradiated with ultraviolet light. The titanium dioxide of the outer layer 4 may be irradiated with ultraviolet light from an artificial light source such as black light.
【００２０】図２は本発明の他の実施例を示す断面図で
あり、本実施例は、例えば走行車線と対向車線との間に
設置され、両側から入射してくる音を吸音させるための
防音壁等として好適に用いられるものであり、中空体１
を、中間に配した遮音板１３の両面にそれぞれ空間部１
４を存して多数の開口部１１を有する有孔板１２を配し
て形成される中空パネル状とし、その中空体１のそれぞ
れの空間部１４に、遮音板１３との間に空気層２を存し
て吸音材３を内装すると共にそれぞれの有孔板１２の表
面に二酸化チタンを含む外層４を形成し、且つ有孔板１
２の外層４の二酸化チタンに太陽光による紫外光が照射
されるようになされているものであり、他は図１の実施
例とほぼ同様である。FIG. 2 is a cross-sectional view showing another embodiment of the present invention. This embodiment is installed between, for example, a traveling lane and an oncoming lane, and is for absorbing sounds coming from both sides. The hollow body 1 is preferably used as a soundproof wall or the like.
On the both sides of the sound insulation plate 13 arranged in the middle.
4 in the form of a hollow panel formed by arranging a perforated plate 12 having a large number of openings 11 in each space 14 of the hollow body 1 and an air layer 2 between the sound insulation plate 13. The sound absorbing material 3 is placed inside the outer perforated plate 12 and the outer layer 4 containing titanium dioxide is formed on the surface of each perforated plate 12.
The titanium dioxide of the outer layer 4 of No. 2 is irradiated with ultraviolet light from sunlight, and the others are almost the same as the embodiment of FIG.
【００２１】次に図３は本発明のさらに他の実施例を示
す断面図であり、本実施例では、中空体１を、多数の開
口部１１を有する有孔板１２が湾曲されて形成される筒
状とし、該中空体１内の空間部１４に吸音材３を内装す
ると共に、有孔板１２の表面に二酸化チタンを含む外層
４を形成し，その有孔板１２にブラックライト等の人工
光源５が付設され、この人工光源５による紫外光で外層
４の二酸化チタンが照射されるようになされているもの
である。なお中空体１と吸音材３との間に隙間が設けら
れ、また吸音材３は中空状、すなわちその中心部が空洞
１５となされ、低周波領域の音が効果的に減音されるよ
うになされている。本実施例は、方向に関係なくあらゆ
る方向からの音が開口部１１から入射され、吸音材３に
より吸音されるので、橋梁や高架道路橋、堀割、半地下
道路等の構造体の下面部等に好適に設置されるものであ
る。Next, FIG. 3 is a sectional view showing still another embodiment of the present invention. In this embodiment, the hollow body 1 is formed by bending a perforated plate 12 having a large number of openings 11. The hollow body 1 has a hollow space 1 in which the sound absorbing material 3 is placed in the space 14, and the outer layer 4 containing titanium dioxide is formed on the surface of the perforated plate 12. An artificial light source 5 is attached, and the titanium dioxide of the outer layer 4 is irradiated with the ultraviolet light from the artificial light source 5. It should be noted that a gap is provided between the hollow body 1 and the sound absorbing material 3, and the sound absorbing material 3 is hollow, that is, the center portion thereof is the cavity 15, so that the sound in the low frequency region can be effectively reduced. Has been done. In this embodiment, since sound from all directions is incident from the opening 11 regardless of the direction and is absorbed by the sound absorbing material 3, the lower surface of a structure such as a bridge, an elevated road bridge, a trench, a semi-underground road, etc. It is suitable for installation.
【００２２】[0022]
【発明の効果】本発明による吸音性構造体によれば、車
両等の走行に伴う騒音は開口部より中空体内に入射され
て吸音材により吸音される。また車両等の排気ガス等か
ら排出された窒素酸化物や硫黄酸化物等の汚染物質が多
く存在する地表近くの空気は、車両等の走行に伴う風圧
によっ巻き上げられて中空体の表面に運ばれ、一方紫外
光の照射によって中空体の表面に形成された外層の二酸
化チタンが活性化されており、この活性化された二酸化
チタンに巻き上げられた空気中の窒素酸化物や硫黄酸化
物等が吸着されれば、また空気中を拡散したこれらの窒
素酸化物や硫黄酸化物等が触れれば、二酸化チタンの活
性化による強い酸化力と水分の存在によって硝酸や硫酸
等に酸化されて外層上に捕捉され、効果的に空気中より
除去される。According to the sound absorbing structure of the present invention, the noise generated by the running of the vehicle is made to enter the hollow body through the opening and is absorbed by the sound absorbing material. In addition, air near the ground surface, which contains a large amount of pollutants such as nitrogen oxides and sulfur oxides emitted from exhaust gas of vehicles, etc., is rolled up by the wind pressure accompanying the traveling of vehicles, etc. On the other hand, the outer layer of titanium dioxide formed on the surface of the hollow body is activated by the irradiation of ultraviolet light, and the nitrogen oxides and sulfur oxides in the air wound up on the activated titanium dioxide are If they are adsorbed, or if these nitrogen oxides or sulfur oxides that have diffused in the air come into contact, they will be oxidized to nitric acid or sulfuric acid due to the strong oxidizing power due to the activation of titanium dioxide and the presence of water, and then they will be oxidized on the outer layer. Trapped in the air and effectively removed from the air.
【図１】本発明に係る吸音性構造体の一実施例を示す断
面図である。FIG. 1 is a sectional view showing an embodiment of a sound absorbing structure according to the present invention.
【図２】本発明に係る吸音性構造体の他の実施例を示す
断面図である。FIG. 2 is a sectional view showing another embodiment of the sound absorbing structure according to the present invention.
【図３】本発明に係る吸音性構造体のさらに他の実施例
を示す断面図である。FIG. 3 is a sectional view showing still another embodiment of the sound absorbing structure according to the present invention.
１ 中空体 １１ 開口部 １２ 有孔板 １３ 遮音板 １４ 空間部 １５ 空洞 ２ 空気層 ３ 吸音材 ４ 外層 ５ 光源 DESCRIPTION OF SYMBOLS 1 Hollow body 11 Opening part 12 Perforated plate 13 Sound insulation plate 14 Space part 15 Cavity 2 Air layer 3 Sound absorbing material 4 Outer layer 5 Light source
フロントページの続き (72)発明者 根岸 信彰 茨城県つくば市小野川16番３ 工業技術院 資源環境技術総合研究所内 (72)発明者 太田 和亘 滋賀県蒲生郡安土町桑実寺38−58 (72)発明者 土井 尊弘 滋賀県蒲生郡竜王町鏡2041 (72)発明者 田近 悟 滋賀県野洲郡野洲町行畑242−１Front page continuation (72) Inventor Nobuaki Negishi 16-3 Onogawa, Tsukuba, Ibaraki Institute of Industrial Science and Technology, National Institute of Advanced Industrial Science and Technology (72) Inventor Kazunori Ota 38-58, 72, Kuwajiji, Azuchi-cho, Gamo-gun, Shiga Prefecture (72) Invention Takahiro Doi, 2041 Mirror, Ryuo-cho, Gamo-gun, Shiga Prefecture Inventor Satoru Tajika 242-1 Yukuhata, Yasu-cho, Yasu-gun, Shiga Prefecture
Claims (6)
に吸音材が内装され、前記中空体の表面の少なくとも一
部に二酸化チタンを含む外層が形成され、該二酸化チタ
ンに紫外光が照射されるようになされた吸音性構造体。1. A sound absorbing material is provided in a space of a hollow body having a large number of openings, an outer layer containing titanium dioxide is formed on at least a part of the surface of the hollow body, and the titanium dioxide is irradiated with ultraviolet light. Sound-absorbing structure.
する有孔板を配し、他方の面に遮音板を配して形成され
る中空パネル状となされ、該中空体の有孔板と遮音板と
の間に形成された空間部に吸音材が内装され、有孔板お
よび／または遮音板の表面に二酸化チタンを含む外層が
形成された請求項１記載の吸音性構造体。2. The hollow body is a hollow panel formed by arranging a perforated plate having a large number of openings on one surface and a sound insulating plate on the other surface, and the hollow body has a structure. The sound absorbing structure according to claim 1, wherein a sound absorbing material is provided in a space formed between the perforated plate and the sound insulating plate, and an outer layer containing titanium dioxide is formed on a surface of the perforated plate and / or the sound insulating plate. .
面にそれぞれ空間部を存して多数の開口部を有する有孔
板を配して形成される中空パネル状となされ、該中空体
のそれぞれの空間部に吸音材が内装され、少なくとも一
方の有孔板の表面に二酸化チタンを含む外層が形成され
た請求項１記載の吸音性構造体。3. The hollow body is in the form of a hollow panel formed by arranging perforated plates having a large number of openings each having a space on both sides of a sound insulation plate arranged in the middle thereof. The sound absorbing structure according to claim 1, wherein a sound absorbing material is provided in each space of the body, and an outer layer containing titanium dioxide is formed on the surface of at least one of the perforated plates.
孔板が湾曲されて形成される筒状となされ、該中空体内
の空間部に吸音材が内装され、有孔板の表面に二酸化チ
タンを含む外層が形成された請求項１記載の吸音性構造
体。4. The hollow body is formed into a cylindrical shape by bending a perforated plate having a large number of openings, and a sound absorbing material is provided in a space inside the hollow body, and a surface of the perforated plate is provided. The sound absorbing structure according to claim 1, wherein an outer layer containing titanium dioxide is formed.
ンと共に吸着剤が含まれている請求項１、２、３または
４記載の吸音性構造体。5. The sound absorbing structure according to claim 1, wherein the outer layer containing titanium dioxide contains an adsorbent together with titanium dioxide.
該二酸化チタンに紫外光が照射されるようになされた請
求項１、２、３、４または５記載の吸音性構造体。6. The sound absorbing material carries titanium dioxide,
The sound absorbing structure according to claim 1, wherein the titanium dioxide is irradiated with ultraviolet light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8081088A JPH09268526A (en) | 1996-04-03 | 1996-04-03 | Sound-absorptive structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8081088A JPH09268526A (en) | 1996-04-03 | 1996-04-03 | Sound-absorptive structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09268526A true JPH09268526A (en) | 1997-10-14 |
Family
ID=13736647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8081088A Pending JPH09268526A (en) | 1996-04-03 | 1996-04-03 | Sound-absorptive structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09268526A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008175019A (en) * | 2007-01-22 | 2008-07-31 | Kurimoto Ltd | Purifying soundproof structure having exhaust emission control function and road structure using the structure |
| CN104776952A (en) * | 2015-04-10 | 2015-07-15 | 中南大学 | Wind barrier wind load site test mechanism for high-speed railway and testing method |
| CN105200930A (en) * | 2015-10-20 | 2015-12-30 | 秦皇岛首创思泰意达环保科技有限公司 | Sound insulation and noise reduction wind-mitigating dust extractor |
| CN105755972A (en) * | 2016-03-02 | 2016-07-13 | 袁地保 | Combined sound absorption cap |
-
1996
- 1996-04-03 JP JP8081088A patent/JPH09268526A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008175019A (en) * | 2007-01-22 | 2008-07-31 | Kurimoto Ltd | Purifying soundproof structure having exhaust emission control function and road structure using the structure |
| CN104776952A (en) * | 2015-04-10 | 2015-07-15 | 中南大学 | Wind barrier wind load site test mechanism for high-speed railway and testing method |
| CN104776952B (en) * | 2015-04-10 | 2017-06-20 | 中南大学 | A kind of high-speed iron transportation work style barrier wind load on-the-spot test mechanism and method of testing |
| CN105200930A (en) * | 2015-10-20 | 2015-12-30 | 秦皇岛首创思泰意达环保科技有限公司 | Sound insulation and noise reduction wind-mitigating dust extractor |
| CN105200930B (en) * | 2015-10-20 | 2017-10-20 | 秦皇岛首创思泰意达环保科技有限公司 | A kind of highway sound insulation and noise reduction checking dust exhaust apparatus |
| CN105755972A (en) * | 2016-03-02 | 2016-07-13 | 袁地保 | Combined sound absorption cap |
| CN105755972B (en) * | 2016-03-02 | 2019-08-27 | 西藏中驰集团股份有限公司 | Combined type sound absorption cap |
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