JP2006265855A

JP2006265855A - See-through sound-insulating plate and sound-insulating wall

Info

Publication number: JP2006265855A
Application number: JP2005081857A
Authority: JP
Inventors: Yoshihiro Ota; 義博太田; Yasunobu Suzuki; 泰伸鈴木; Shinji Hidaka; 新次日高; Yoichi Ikeda; 陽一池田
Original assignee: NGK Insulators Ltd
Current assignee: NGK Insulators Ltd
Priority date: 2005-03-22
Filing date: 2005-03-22
Publication date: 2006-10-05

Abstract

<P>PROBLEM TO BE SOLVED: To enhance see-through properties by reducing a dazzling feeling brought about by reflected light caused by the surface and pores of a porous plate body. <P>SOLUTION: This see-through sound-insulating plate 1 is constituted by attaching see-through film-like materials 21 and 22, a see-through sound-absorbing material 10, and a see-through sound-insulating material 4 to a panel frame material 3 in such a manner that a space is interposed. The film-like materials 21 and 22 are, for example, a fluoroplastic film of polyvinyl fluoride etc., and a transparent synthetic resin film of polyester, polypropylene, polyethylene, etc. The material 10 is formed by alternately laminating porous plates 11, 12, 11a and 12a, subjected to through-hole punching, on a transparent plate material composed of an organic polymeric material of a natural resin and a synthetic resin such as polycarbonate. A transparent material is used for the film-like materials 21 and 22, the porous plates 11 and 12, etc., and at least one of the porous plates 11 and 12 etc. is colored and transparent. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、道路鉄道などの騒音対策に用いられる透視性があり、かつ吸音性を有する防音板および防音壁に関する。 The present invention relates to a soundproof plate and a soundproof wall having transparency and sound absorption used for noise countermeasures for road railways and the like.

従来、防音壁に用いられる防音板としては、グラスウール等の多孔質吸音材を金属等の枠に入れて音源側を吸音性とし、反対側を遮音性の板で構成した吸音性の遮音板やポリカーボネートなどの透明プラスチックを用いた透光性の遮音板が用いられているが、吸音性遮音板は吸音性や遮音性は有するが、透光性、透視性がないので日照や視界を妨げる問題があり、また透光性遮音板は、透光性や遮音性はあるものの吸音性がないため音源側での音の反射により騒音レベルの上昇が起こる問題があった。 Conventionally, as a soundproof plate used for a soundproof wall, a sound absorbing sound insulating plate in which a porous sound absorbing material such as glass wool is put in a metal frame to make the sound source side sound absorbing and the other side is made of a sound insulating plate, Translucent sound insulation board using transparent plastics such as polycarbonate is used, but sound absorptive sound insulation board has sound absorptivity and sound insulation, but there is no translucency and transparency, so it interferes with sunlight and visibility In addition, the translucent sound insulating plate has translucency and sound insulating properties, but has no sound absorbing property, so there is a problem that the noise level increases due to reflection of sound on the sound source side.

上記問題を解決するため、透明の樹脂製フィルムと、アルミニウム製エキスパンドメタル等の多孔板とを積層した透光性吸音材（特許文献１を参照）、あるいはこれと透光性遮音材を組み合わせた防音パネル（特許文献２を参照）を本願出願人らは提案している。 In order to solve the above problems, a light-transmitting sound absorbing material (see Patent Document 1) in which a transparent resin film and a porous plate such as an aluminum expanded metal are laminated, or this and a light-transmitting sound insulating material are combined. The present applicants have proposed a soundproof panel (see Patent Document 2).

この透光性吸音材は、透光性の膜状材料（透明樹脂製フィルム）自体の振動と、膜状材料と多孔板との間の摩擦によって音のエネルギーを吸収するという吸音材で、多孔板と膜状材料の組み合わせで透光性を確保するものである。多孔板自体が非透光性の材料であっても、多孔板の孔の部分が透光性を持っているので、全体として透光性材料と言える場合があり、また多孔板自体が透光性の材料の場合は、孔の部分も孔を明けていない部分（＝材料全体）が透光性ということになる。 This translucent sound absorbing material is a sound absorbing material that absorbs sound energy by vibration of the translucent film material (transparent resin film) itself and friction between the film material and the perforated plate. A combination of a plate and a film-like material secures translucency. Even if the perforated plate itself is a non-translucent material, since the hole portion of the perforated plate has translucency, it may be said that the whole is a translucent material. In the case of a transparent material, the portion where the hole is not formed (= the whole material) is translucent.

当然、前者に比べて後者の方が光線の透過性（光線透過率）は大きいことになるが、太陽光線などが多孔板本体（孔明き部以外の面）や孔のエッジ当たったときに、条件によっては強い乱反射が起こり、目に眩しさを感じさせ対象物が見え難くなるというように、反射光に眩惑されて見通し性が低下する問題があった。
特開平０４−１８６３９７号公報：課題を解決するための手段の欄、図１など。特開２０００−３０３４１２号公報：特許請求の範囲、〔０００６〕、〔０００７〕、〔０００８〕、〔０００９〕など。 Of course, the latter has a greater light transmittance (light transmittance) than the former, but when the sun rays hit the perforated plate body (surface other than the perforated part) or the edge of the hole, Depending on the conditions, strong irregular reflection occurs, causing the eyes to feel dazzled and making the object difficult to see, resulting in a problem that the visibility is reduced due to dazzling by the reflected light.
Japanese Patent Laid-Open No. 04-186397: column of means for solving the problem, FIG. JP 2000-303412 A: claims, [0006], [0007], [0008], [0009] and the like.

本発明は、上記の問題点を解決するためになされたものであり、吸音性、遮音性を備えた、かつ孔板本体やその孔に起因する反射光による眩惑感を低減して、見通し性を向上することを可能とする透視性防音板および防音壁を提供する。 The present invention has been made to solve the above-described problems, and has a sound absorbing property and a sound insulating property, and reduces the dazzling feeling caused by the reflected light caused by the hole plate main body and the holes, thereby improving the visibility. Provided are a transparent soundproof plate and a soundproof wall that can improve the sound resistance.

上記の問題は、次の本発明の透視性防音板によって解決することができる。すなわち、透視性の膜状材料と透視性の多孔板とを積層した透視性吸音材と、透視性遮音材とを空間を隔ててパネル枠材に取り付けてなる透視性防音板において、透視性吸音材の前記膜状材料と多孔板を透明な材料とするとともに、その多孔板の少なくとも１枚が有色透明な材料からなることを特徴とする透視性防音板である。
また、本発明は、前記有色透明の透視性多孔板が着色有機高分子系材料からなるのが好ましい。 The above problem can be solved by the following transparent soundproof board of the present invention. That is, in a see-through sound insulation board in which a see-through sound-absorbing material in which a see-through film-like material and a see-through perforated plate are laminated and a see-through sound-insulating material are attached to a panel frame member with a space therebetween, A transparent soundproof board characterized in that the film-like material and the porous plate are made of a transparent material, and at least one of the porous plates is made of a colored transparent material.
In the present invention, it is preferable that the colored transparent see-through perforated plate is made of a colored organic polymer material.

また、上記の問題は、次の本発明の防音壁によっても解決することができる。すなわち、前記した透視性防音板を、自動車道路に沿って、上下に段積みして設置したことを特徴とする防音壁であり、より具体的には、透光性の膜状材料と透光性の多孔板を積層した透光性吸音材と、透光性遮音材とを空間を隔ててパネル枠材に取り付けた透光性防音板を段積みして、自動車用道路に設置される防音壁において、前記した透視性防音板を通行車輌の高さ以下の個所に配置したことを特徴とする防音壁である。 The above problem can also be solved by the following soundproof wall of the present invention. That is, it is a soundproof wall characterized in that the above-described transparent soundproof plates are stacked in a vertical direction along an automobile road, more specifically, a translucent film-like material and a translucent material. Sound-proof sound-absorbing material laminated with transparent perforated plates and light-transmitting sound-insulating material stacked on a panel frame material with a space between them, and installed on automobile roads The soundproofing wall is characterized in that the above-mentioned see-through soundproofing plate is disposed at a location below the height of the passing vehicle.

本発明の透視性防音板は、膜状材料、多孔板および遮音材によって、吸音性も幅広い周波数にわたって高い性能を有するので、防音壁として設置した場合、騒音の反射を十分抑制でき、遮音性も高いので、防音効果、遮音効果を高めるることができる。また、前記各部材は透視性材料からなるので、防音壁を高くしても日照や視界（透視性）を損なうことがない。 The see-through soundproof board of the present invention has high performance over a wide range of frequencies due to the membrane material, perforated board and sound insulation material, so when installed as a soundproof wall, reflection of noise can be sufficiently suppressed, and sound insulation is also provided. Since it is high, the soundproofing effect and the sound insulation effect can be enhanced. Moreover, since each said member consists of a see-through | perspective material, even if it raises a sound-proof wall, sunlight and a visual field (permeability) will not be impaired.

さらに、有色多孔板を用いることにより反射光の眩惑感を抑えることもでき、逆光線などの悪条件でも透視性に優れているため、道路利用者の安全性や快適性、沿道利用の利便性も向上する利点がある。このような優れた効果を発揮するので、本発明は、従来の問題点を解消した透視性防音板および防音壁として、その実用的価値はきわめて大なるものがある。 In addition, the use of colored perforated plates can suppress the dazzling feeling of reflected light, and it has excellent transparency even under adverse conditions such as reverse rays, so it is safe and comfortable for road users, and convenient for roadside use. There is an advantage to improve. Since such an excellent effect is exhibited, the present invention has a very large practical value as a see-through soundproof board and a soundproof wall that have solved the conventional problems.

次に、本発明の透視性防音板および防音壁に係る実施形態について、図１〜８を参照しながら説明するが、先ず、透視性防音板から説明する。 Next, embodiments of the transparent soundproof plate and the soundproof wall according to the present invention will be described with reference to FIGS. 1 to 8. First, the transparent soundproof plate will be described.

（本発明の透視性防音板）
本発明の透視性防音板の特徴とするところは、透視性の膜状材料２１、２２と透視性の多孔板１１、１２、１１ａ、１２ａとを交互に積層して形成される透視性吸音材１０と、透視性遮音材４とを空間を隔ててパネル枠材３に取り付けて構成される透視性防音板１において、前記膜状材料２１、２２と多孔板１１、１２などを透明な材料とするとともに、その多孔板１１、１２などの少なくとも１枚を有色透明な多孔板とするようにした点にある。以下、詳述する。 (Transparent soundproof board of the present invention)
The feature of the see-through soundproof board of the present invention is that the see-through sound-absorbing material is formed by alternately laminating see-through film-like materials 21 and 22 and see-through perforated plates 11, 12, 11a and 12a. 10 and a transparent sound insulation board 1 configured by attaching the transparent sound insulation material 4 to the panel frame member 3 with a space therebetween, the film materials 21 and 22 and the porous plates 11 and 12 are made of a transparent material. In addition, at least one of the perforated plates 11 and 12 is a colored transparent perforated plate. Details will be described below.

（透視性吸音材１０）
本発明の構成部材の一つである透視性吸音材１０は、透明の膜状材料２１の両側に透視性多孔板１１、１２を、または片側に多孔板１１を配置した吸音材であって、入射した音波を膜状材料２１などの振動と、その振動に基づく膜状材料と多孔板との摩擦によってエネルギー吸収して吸音作用を発揮するようにした吸音材である。
以下に、使用する膜状材料、多孔板について述べる。 (Transparent sound absorbing material 10)
A transparent sound-absorbing material 10 that is one of the constituent members of the present invention is a sound-absorbing material in which transparent porous plates 11 and 12 are disposed on both sides of a transparent film-like material 21 or a porous plate 11 is disposed on one side. The sound absorbing material is configured to absorb the energy of incident sound waves by vibrations of the film-like material 21 and the friction between the film-like material and the perforated plate based on the vibrations, thereby exhibiting a sound absorbing action.
The membrane material and perforated plate used will be described below.

（膜状材料）
膜状材料（２１、２２など）は、ポリフッ化ビニル、ポリフッ化エチレン等のフッ素樹脂系フィルムやポリエステル、ポリプロピレン、ポリ塩化ビニル、ポリエチエン、酢酸ビニル、ポリビニリデンなどの透明な合成樹脂フィルムが用いられる。膜状材料の厚さが厚いと膜振動が生じにくくなり吸音率が低下し、薄すぎると破損し易くなるので、厚さは６μ〜５００μが好ましい。 (Film material)
As the film-like material (21, 22, etc.), a fluororesin film such as polyvinyl fluoride or polyfluorinated ethylene or a transparent synthetic resin film such as polyester, polypropylene, polyvinyl chloride, polyethylene, vinyl acetate or polyvinylidene is used. . If the thickness of the film-like material is large, film vibration is less likely to occur and the sound absorption rate is lowered. If the film-like material is too thin, the film is likely to be damaged. Therefore, the thickness is preferably 6 μm to 500 μm.

（多孔板）
多孔板（１１、１２、１１ａ、１２ａなど）は、ポリカーボネート、ポリ塩化ビニル等の合成樹脂や天然樹脂の有機高分子材料からなる有色または無色の透明板材に貫通孔明け加工した孔明き板が、柔軟性があり、加工しやすく、破損が生じ難いので好ましい。その厚さは、特に限定はないが１〜５ｍｍが適当である。 (Perforated plate)
The perforated plate (11, 12, 11a, 12a, etc.) is a perforated plate that is a perforated plate made of a colored or colorless transparent plate made of a synthetic resin such as polycarbonate or polyvinyl chloride or an organic polymer material of natural resin. It is preferable because it is flexible, easy to process, and hardly breaks. The thickness is not particularly limited, but 1 to 5 mm is appropriate.

多孔板の開口率は、２０〜４０％の範囲が、吸音性と透視性の点から好ましい。また、１個の開口（孔）の大きさは３〜５０ｍｍが好ましい。透視性の点では孔が大きい方が好ましいが、大きいと、膜振動に基づく吸音性が低下する。
なお、孔の形状は円、楕円、三角、四角、多角形などいずれの形状でもよい。 The aperture ratio of the perforated plate is preferably in the range of 20 to 40% from the viewpoint of sound absorption and transparency. The size of one opening (hole) is preferably 3 to 50 mm. From the perspective of transparency, it is preferable that the hole is large.
The shape of the hole may be any shape such as a circle, an ellipse, a triangle, a square, or a polygon.

（膜状材料と多孔板の組み合わせ）
前記の膜状材料と多孔板の組み合わせは、１枚の膜状材料２１と多孔板１１または１１ａの１枚とを積層して２層構成（図１Ａ、Ｂ）にしたもの、１枚の膜状材料２１の両側に多孔板１１、１２または１１ａ、１２ａのそれぞれ１枚を配して積層し３層構成（図２Ａ、Ｂ）にしたもの、３層構成に更に１枚膜状材料２２を加えて４層構成（図３Ａ、Ｂ）にしたもの、１枚の多孔板１１または１１ａの両側に膜状材料２１、２２をそれぞれ１枚配して３層構成（図４Ａ、Ｂ）にしたものなどがあるが限定はない。 (Combination of membrane material and perforated plate)
The combination of the membrane material and the perforated plate is obtained by laminating one membrane material 21 and one of the perforated plates 11 or 11a to form a two-layer structure (FIG. 1A, B). One of the perforated plates 11, 12 or 11a, 12a is arranged on both sides of the sheet material 21 to form a three-layer structure (FIGS. 2A and 2B), and one sheet material 22 is further added to the three-layer structure. In addition, a four-layer configuration (FIGS. 3A and 3B) has a three-layer configuration (FIGS. 4A and B) by placing one film-like material 21 and 22 on both sides of one porous plate 11 or 11a. There are things, but there is no limitation.

本発明の最も特徴とするところは、その多孔板１、１２などのうち、少なくとも１枚を有色透明な板材料としている点である。その色調は、黒、灰、青、緑、茶、ブロンズなど限定はないが、孔明け加工前の板材の状態での全光線透過率を７０％以上、好ましくは８０％以上の淡色に止めておくことが視界の明るさや見通し性を確保する点から好ましい。また、使用場所における周囲との環境調和や、鳥の衝突防止などの観点から、色の種類や濃淡を選択することができる。また、透光性吸音材に紫外線などに対する耐候性処理を施しておくのもよい。 The most characteristic feature of the present invention is that at least one of the perforated plates 1 and 12 is a colored transparent plate material. The color tone is not limited to black, gray, blue, green, brown, bronze, etc., but the total light transmittance in the state of the plate material before drilling is limited to a light color of 70% or more, preferably 80% or more. It is preferable to keep the brightness and visibility of the field of view. In addition, from the viewpoint of environmental harmony with the surroundings at the place of use and prevention of bird collision, color types and shades can be selected. In addition, the light-transmitting sound absorbing material may be subjected to a weather resistance treatment against ultraviolet rays or the like.

本発明では、このように有色透明な多孔板を使用するのは、無色透明な多孔板に場合に生じるところの、多孔板本体の面、孔に起因する反射光による眩惑感を低減させる作用があるからである。これは、透明感のある色調よって生じる、反射光量自体の低下と視力への刺激の緩和にもとづくものとと考えられる。 In the present invention, the use of the colored transparent perforated plate as described above has the effect of reducing the dazzling feeling caused by the reflected light caused by the surface of the perforated plate body and the holes, which occurs in the case of the colorless and transparent perforated plate. Because there is. This is considered to be based on a decrease in the amount of reflected light itself caused by a transparent color tone and relaxation of a stimulus to visual acuity.

また、本発明では、吸音材を構成する全ての多孔板を有色透明にしてもよいが、光透過率が低下して必要以上に視界が暗くなるので、透光性防音板１の表側（音源側）に面する多孔板を有色透明し、それ以外の多孔板は無色透明にしておくことが好ましい。 In the present invention, all of the porous plates constituting the sound absorbing material may be colored and transparent. However, since the light transmittance is lowered and the field of view becomes darker than necessary, the front side of the translucent soundproof plate 1 (sound source) It is preferable that the porous plate facing side) is colored and transparent, and the other porous plates are colorless and transparent.

また、積層した膜状材料２１、２２などと多孔板１１、１２などの間は、膜状材料の振動により摩擦が生ずる程度の軽い接触状態にしておくことが好ましい。もちろん、外周部分や中間補強部分などにおいて部分的には機械的に固定するものとする。そして、積層の際の膜状材料の張り方については、吸音性能と見通し性を考慮して弛めたり張り気味にしたりして調整、設定するのがよい。 In addition, it is preferable that the laminated film materials 21 and 22 and the perforated plates 11 and 12 have a light contact state in which friction is generated by vibration of the film material. Of course, the outer peripheral portion and the intermediate reinforcing portion are partially fixed mechanically. And how to stretch the film-like material at the time of lamination is preferably adjusted and set by loosening or tensioning in consideration of sound absorption performance and visibility.

（パネル枠材３）
本発明の構成部材の一つであるパネル枠材３は、アルミニウム、鉄などの金属や塩化ビニルなどの合成樹脂材料の押出し型材、折板材の他、セラミック、セメントなどの無機材料の成形型材からなる枠材が適宜に応用可能である。 (Panel frame material 3)
The panel frame material 3 which is one of the constituent members of the present invention is made of an extrusion mold material made of a metal such as aluminum or iron or a synthetic resin material such as vinyl chloride, a folded plate material, or a molding die material made of an inorganic material such as ceramic or cement. Can be applied as appropriate.

（透視性遮音板４）
ポリカーボネート、塩化ビニール、メタクリル樹脂、スチロール樹脂、ＡＢＳ樹脂、フッ化エチレン樹脂、アクリル樹脂などの合成樹脂やゴムであって無色透明な板材を単層または複層にして用いる。その外形サイズは、防音板の大きさにより決まる。また、厚さは必要とする遮音力（音響透過損失）から設定されるが、道路防音壁に用いる場合で前記合成樹脂板の場合は、３〜１０ｍｍが好ましい。
この透視性遮音板には、紫外線等に対する耐候性処理や表面硬さ向上のための処理や網などによる補強を施したものも利用可能である。 (Transparent sound insulation board 4)
A synthetic resin such as polycarbonate, vinyl chloride, methacrylic resin, styrene resin, ABS resin, fluorinated ethylene resin, acrylic resin, or rubber, and a colorless and transparent plate material is used as a single layer or multiple layers. The external size is determined by the size of the soundproof plate. Moreover, although thickness is set from the sound insulation force (sound transmission loss) to require, in the case of the said synthetic resin board when using for a road noise barrier, 3-10 mm is preferable.
As this see-through sound insulation board, it is also possible to use a weatherproofing treatment against ultraviolet rays or the like, a treatment for improving surface hardness, or a reinforcement by a net or the like.

（透視性防音板１）
本発明の透視性防音板１は、その断面を示す図６、７に示すように、透視性吸音材１０と、透視性遮音材４と、その両者を空間を隔てて配設するパネル枠材３とから構成される。その高さの中間部分には、中間枠補強材３１を横架し、透視性吸音材１０を部分的に固定するのもよい。 (Transparent soundproof board 1)
As shown in FIGS. 6 and 7 showing the cross section of the see-through soundproof board 1 of the present invention, a see-through sound absorbing material 10, a see-through sound insulating material 4, and a panel frame member in which both are disposed with a space therebetween. 3. An intermediate frame reinforcing material 31 may be horizontally mounted on the intermediate portion of the height, and the transparent sound absorbing material 10 may be partially fixed.

さらに、パネル枠材３、中間枠補強材３１に沿って、予め多孔質吸音材５１、５２を取り付けるのが好ましい。そして、透視性吸音材、パネル枠材、内部に配置する多孔質吸音材、透視性遮音板などは、リベット、ビス、接着剤などを用いてパネル状に組み立てられる。この場合、透視性吸音材１０と遮音板４の間には背後空気層を設けるものとする。 Furthermore, it is preferable to attach porous sound absorbing materials 51 and 52 in advance along the panel frame member 3 and the intermediate frame reinforcing member 31. The transparent sound-absorbing material, the panel frame material, the porous sound-absorbing material disposed inside, the transparent sound-insulating plate, and the like are assembled into a panel shape using rivets, screws, adhesives, and the like. In this case, a back air layer is provided between the transparent sound absorbing material 10 and the sound insulating plate 4.

透視性防音板の厚さは、音源の周波数に合わせて設定する。厚さを薄くすると高周波領域の吸音率の向上に効果があり、厚くすると低周波領域の吸音率の向上に効果的となるが、一般的には５０〜２００ｍｍの範囲内の厚さが適当である。 The thickness of the transparent soundproof board is set according to the frequency of the sound source. Decreasing the thickness is effective in improving the sound absorption coefficient in the high frequency region. Increasing the thickness is effective in improving the sound absorption coefficient in the low frequency region, but generally a thickness in the range of 50 to 200 mm is appropriate. is there.

さらに、若干補足する。
透視性防音板の全体形状として、湾曲面を持つ曲面加工したものでもよい。また、透光性防音板の表面、裏面、内部に汚れ防止や窒素酸化物浄化のため二酸化チタン等の光触媒を塗布等によって付着させておくのもよい。また、防音板の上端および下端には防音板を積み上げて設置するときのはめ込み部（図示せず）や両端部に落下防止用のワイヤーロープを通す孔（図示せず）を設けてもよい。また、表面、裏面とも吸音性の両面吸音性防音板とする場合は、防音板の断面構成を透視性吸音材―空気層―透視性遮音―空気層―透視性吸音材の部材構成とすればよい。 Furthermore, it supplements a little.
The entire shape of the see-through soundproof board may be a curved surface having a curved surface. In addition, a photocatalyst such as titanium dioxide may be attached to the front, back, and inside of the translucent soundproof plate by coating or the like to prevent contamination and purify nitrogen oxides. In addition, an upper end and a lower end of the soundproof plate may be provided with fitting portions (not shown) when the soundproof plates are stacked and installed, and holes (not shown) through which the wire ropes for preventing the fall are passed at both ends. If both front and back surfaces are sound-absorbing sound-absorbing sound-insulating plates, the sound-insulating plate should have a cross-sectional structure of transparent sound-absorbing material-air layer-see-through sound insulation-air layer-see-through sound absorbing material. Good.

（本発明の防音壁）
本発明の防音壁は、図８に示すように、前記した透視性防音板１、１を、自動車道路に沿って敷設した基礎部分６に立設したＨ形鋼材６１、６１間に積み上げるように上下に段積みして設置した防音壁である。さらに、より具体的には、自動車道路に沿って敷設された防音壁のうち、前記した透視性防音板１、１を通行車輌の高さ以下の個所に配置するようにした防音壁である。なお、実質的には高架道路の場合道路面からの高さ２ｍ〜３ｍ以下、平坦道路の場合３ｍ〜５ｍ以下の部分を有色透明な多孔板を用いた透視性防音板を配置すればよい。 (Soundproof wall of the present invention)
As shown in FIG. 8, the soundproof wall of the present invention is configured such that the above-described transparent soundproof plates 1 and 1 are stacked between H-shaped steel members 61 and 61 erected on a base portion 6 laid along the automobile road. It is a soundproof wall that is installed in layers. More specifically, among the soundproof walls laid along the automobile road, the soundproof wall is arranged at a position below the height of the passing vehicle as described above. In addition, what is necessary is just to arrange | position the see-through soundproof board which used the colored transparent perforated board for the part 2m-3m or less from a road surface in the case of an elevated road, and 3m-5m or less in the case of a flat road.

この場合、透視性防音板１、１を配置した以外の個所、例えば、上方部分、天井部分などには、従来の透光性吸音材と透光性遮音材とからなる透光性防音板を段積みするようにすればよい。この透光性防音板には、無色透明な部材または透視性に欠けるが散乱光透過率の高い部材を用いれば、採光性に劣ることはないので視界の明るさは十分に確保できる。 In this case, a translucent soundproof board made of a conventional translucent sound absorbing material and a translucent sound insulating material is provided at places other than where the translucent soundproof boards 1 and 1 are disposed, for example, an upper part and a ceiling part. Just stack them. For this light-transmitting soundproof plate, if a colorless and transparent member or a member with low transparency is used but a member with high scattered light transmittance is used, the brightness of the field of view can be sufficiently secured because the lighting performance is not inferior.

このように、見通し性、採光性の双方を考慮して、ドライバーや歩行者の目線付近の高さまでは本発明の透視性防音板を設置することによって、眩惑感を低減させつつ、見通し性（視認性）を良くして安全性や快適性、沿道利用の利便性を確保するとともに、防音壁の上部には無色透明の多孔板を使用した従来の透光性防音板を設置することによって、道路内外への光線透過を増して採光や日照を向上させることが好ましい。この場合、両者の防音壁の吸音性、遮音性は、実質的に差が無いので、騒音低減効果を損なうことはない。 In this way, in consideration of both visibility and daylighting, by installing the transparent soundproof board of the present invention at a height near the driver's or pedestrian's line of sight, the visibility ( (Visibility) to improve safety, comfort, and convenience for roadside use, and by installing a conventional translucent soundproofing board using a colorless and transparent porous plate on the top of the soundproofing wall, It is preferable to improve daylighting and sunshine by increasing light transmission into and out of the road. In this case, since there is substantially no difference in sound absorption and sound insulation between the two soundproof walls, the noise reduction effect is not impaired.

表１、２に試験体の諸条件と物性の一部を一覧表で示す。
多孔板として、有色透明および無色透明のポリカーボネート樹脂板に孔明け加工を施したものと、膜状材料としてフッ素樹脂フィルムを用いて重ね合わせて積層した本発明の透光性吸音材Ａ〜Ｆと、本発明の範囲外の透光性吸音材Ｇ〜Ｉを表１に示した条件で作成した。なお、積層に際しては、多孔板の四周端とフィルムの四周端を両面テープで固定し、積層した吸音材は、その四辺を透明テープで固定した。吸音材の大きさは約９００ｍｍ×１９００ｍｍとした。 Tables 1 and 2 list various conditions and physical properties of the test specimens.
The translucent sound-absorbing materials A to F of the present invention obtained by perforating colored transparent and colorless transparent polycarbonate resin plates as a perforated plate and superposed and laminated using a fluororesin film as a film material The translucent sound absorbing materials G to I outside the scope of the present invention were prepared under the conditions shown in Table 1. In the lamination, the four peripheral ends of the perforated plate and the four peripheral ends of the film were fixed with a double-sided tape, and the laminated sound-absorbing material was fixed with transparent tape on the four sides. The size of the sound absorbing material was about 900 mm × 1900 mm.

準備した本発明の透光性吸音材Ａ〜Ｆ、本発明の範囲外の透光性吸音材Ｇ〜Ｉと透光性遮音材をパネル枠材に組み付けて、縦横サイズが１０００ｍｍ×２０００ｍｍで厚さが約１３０ｍｍの透光性防音板を作成した。なお、吸音材は、表１に示す前面側を音源側（防音板の表面側）になるように取り付けた。 The prepared translucent sound-absorbing materials A to F of the present invention, translucent sound-absorbing materials G to I and translucent sound insulating materials outside the scope of the present invention are assembled to the panel frame material, and the vertical and horizontal sizes are 1000 mm × 2000 mm thick. A translucent soundproof board having a length of about 130 mm was prepared. The sound absorbing material was attached so that the front side shown in Table 1 was on the sound source side (surface side of the soundproof plate).

なお、透光性遮音板には、厚さが５ｍｍで透明のポリカーボネート板を、パネル枠材には、厚さ２ｍｍのアルミニウム材を用いた。透光性吸音材の止め付けには押さえ板を当ててリベットでパネル枠に固定した。吸音材と遮音板の空間間隔は９０ｍｍとした。 Note that a transparent polycarbonate plate having a thickness of 5 mm was used for the translucent sound insulating plate, and an aluminum material having a thickness of 2 mm was used for the panel frame material. The light-transmitting sound-absorbing material was fixed with a pressing plate and fixed to the panel frame with rivets. The space between the sound absorbing material and the sound insulating plate was 90 mm.

以上の通り製作した透光性防音板について、残響室法吸音率、全光線透過率、見通し性を調査し、その結果を表２に示した。
なお、全光線透過率は、透光性吸音材と透光性遮音材よりサンプルを切り出し、重ね合わせて測定した。また、見通し性については、透光性防音板を屋外に設置し、透光性吸音材側の正面及び斜め４５度から眺めた場合の背景の見え方を調査した。太陽光の位置は、防音板を眺める人の背後にある場合（防音板の手前＝前）と反対側（防音板の後ろ側＝後）の２箇所とした。 The translucent soundproof board manufactured as described above was investigated for the reverberation room method sound absorption coefficient, total light transmittance, and visibility, and the results are shown in Table 2.
The total light transmittance was measured by cutting out a sample from a light-transmitting sound absorbing material and a light-transmitting sound insulating material and overlaying them. As for visibility, a transparent soundproof board was installed outdoors, and the appearance of the background when examined from the front side and the oblique 45 ° angle of the light-transmitting sound absorbing material was investigated. There were two positions of sunlight, the case of being behind a person looking at the soundproof plate (front side of the soundproof plate = front) and the opposite side (back side of the soundproof plate = rear).

表２の結果によれば、吸音率は、多孔板の色調以外の条件が同じであれば、本発明の範囲内と範囲外でも差が無く、全光線透過率は本発明の範囲外の方が高い（大きい）が、見通し性は、正面、及び斜めのいずれにおいても本発明の優れていることが判る。
すなわち、本発明の透光性防音板は、吸音性遮音性は従来と差異がなく、光線透過率は若干下がる（無色に対して有色であるから）が、その程度は視覚に悪影響を与えるほどのものではなく、かえって、見通し性（透視性）は格段に向上するので、防音壁として設置した場合、道路利用者の安全性や快適性、沿道利用の利便性が向上するのである。 According to the results in Table 2, if the sound absorption rate is the same except for the color tone of the porous plate, there is no difference between the range of the present invention and the range outside the range of the present invention, and the total light transmittance is outside the range of the present invention. Although it is high (large), it can be seen that the visibility is excellent both in the front and in the oblique direction.
In other words, the translucent soundproof board of the present invention has no difference in sound-absorbing and sound-insulating properties, and the light transmittance is slightly lowered (because it is colored against colorlessness), but the degree of this has a negative effect on vision. On the contrary, the visibility (transparency) is remarkably improved. Therefore, when installed as a soundproof wall, the safety and comfort of road users and the convenience of roadside use are improved.

本発明に用いられる透視性吸音材の部材の構成図１の（Ａ）（Ｂ）。Configuration of members of a transparent sound-absorbing material used in the present invention. FIG. 同じく部材の構成図２の（Ａ）（Ｂ）。Similarly (A) and (B) in FIG. 同じく部材の構成図３の（Ａ）（Ｂ）。Similarly, (A) and (B) in FIG. 同じく部材の構成図４の（Ａ）（Ｂ）。Similarly, FIG. 4A and FIG. 本発明の透視性防音板を説明するための要部正面図（Ａ）、要部縦断面図（Ｂ）。The principal part front view (A) and principal part longitudinal cross-sectional view (B) for demonstrating the see-through soundproof board of this invention. 透視性防音板の１形態を示す縦断面図。The longitudinal section showing one form of a see-through soundproof board. 透視性防音板の他の形態を示す縦断面図。The longitudinal cross-sectional view which shows the other form of a see-through soundproof board. 本発明の防音壁の組み立てを示す要部斜視図。The principal part perspective view which shows the assembly of the soundproof wall of this invention.

符号の説明Explanation of symbols

１：透視性防音板、１０：透視性吸音材、１１、１１ａ：多孔板、１２、１２ａ：多孔板
２１、２２：膜状材料
３：パネル枠材
４：透視性遮音材 DESCRIPTION OF SYMBOLS 1: Transparent soundproof board, 10: Transparent sound-absorbing material, 11, 11a: Porous board, 12, 12a: Porous board 21, 22: Film-like material 3: Panel frame material 4: Transparent sound-insulating material

Claims

透視性の膜状材料と透視性の多孔板とを積層した透視性吸音材と、透視性遮音材とを空間を隔ててパネル枠材に取り付けてなる透視性防音板において、前記膜状材料と多孔板を透明な材料とするとともに、その多孔板の少なくとも１枚が有色透明な材料からなることを特徴とする透視性防音板。 A see-through soundproofing plate formed by attaching a see-through sound-absorbing material in which a see-through film-like material and a see-through perforated plate are laminated, and a see-through sound-insulating material to a panel frame member with a space therebetween, the film-like material and A transparent soundproofing board characterized in that the porous plate is made of a transparent material, and at least one of the porous plates is made of a colored transparent material.

前記有色透明の透視性多孔板が着色有機高分子系材料からなる請求項１に記載の透視性防音板。 The transparent sound-proof board according to claim 1, wherein the colored transparent see-through perforated panel is made of a colored organic polymer material.

請求項１または２に記載の透視性防音板を、自動車道路に沿って、上下に段積みして設置したことを特徴とする防音壁。 A soundproof wall characterized in that the transparent soundproof board according to claim 1 or 2 is installed vertically stacked along a motorway.

透光性の膜状材料と透光性の多孔板を積層した透光性吸音材と、透光性遮音材とを空間を隔ててパネル枠材に取り付けた透光性防音板を段積みして、自動車用道路に設置される防音壁において、請求項１または２に記載の透視性防音板を通行車輌の高さ以下の個所に配置したことを特徴とする防音壁。

Stacking translucent soundproofing plates with translucent sound absorbing material laminated with translucent film-like material and translucent perforated plate, and translucent sound insulating material attached to panel frame material with space between them A soundproof wall installed on an automobile road, wherein the see-through soundproof plate according to claim 1 or 2 is disposed at a location below the height of the passing vehicle.