JPH11324707A - Sound insulating cover material - Google Patents
Sound insulating cover materialInfo
- Publication number
- JPH11324707A JPH11324707A JP10142353A JP14235398A JPH11324707A JP H11324707 A JPH11324707 A JP H11324707A JP 10142353 A JP10142353 A JP 10142353A JP 14235398 A JP14235398 A JP 14235398A JP H11324707 A JPH11324707 A JP H11324707A
- Authority
- JP
- Japan
- Prior art keywords
- sound
- sound insulating
- air
- insulating cover
- sound absorbing
- 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.)
- Granted
Links
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は遮音カバ−材、より
詳細には、エンジン、殊にディ−ゼルエンジンのように
高騒音を発する機器に遮音のために被覆するもので、遮
熱作用もある遮音カバ−材に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound insulating cover material, and more particularly, to a device for generating high noise such as an engine, especially a diesel engine, for sound insulation, and also has a heat insulating effect. The present invention relates to a certain sound insulating cover material.
【０００２】[0002]
【従来の技術】ディ−ゼルエンジンの場合は、エンジン
における燃焼音が最も大きな騒音源となり、それが加振
源となって周辺部品に伝達され、オイルパンやロッカ−
カバ−等の部分で更に騒音が発生する。これらの騒音
は、鉄板製の車両ボディを通り抜けて外部に伝達され、
騒音公害の一因をなしている。2. Description of the Related Art In the case of a diesel engine, combustion noise in the engine is the largest noise source, which is transmitted to peripheral parts as an excitation source, and is used for an oil pan or rocker.
Further noise is generated at the cover and the like. These noises are transmitted to the outside through the steel plate vehicle body,
It contributes to noise pollution.
【０００３】[0003]
【発明が解決しようとする課題】上述したように、ディ
−ゼルエンジン等の機器においては大きな騒音が発生す
るが、従来はその騒音の伝達を有効に抑制するカバ−類
は提唱されていない。そこで本発明は、これらエンジン
騒音等の伝達を有効に抑制することができ、しかも遮熱
作用もある遮音カバ−材を提供することを課題とする。As described above, although loud noise is generated in equipment such as a diesel engine, a cover that effectively suppresses the transmission of the noise has not been proposed so far. Accordingly, it is an object of the present invention to provide a sound insulating cover material that can effectively suppress transmission of such engine noise and the like and has a heat insulating effect.
【０００４】[0004]
【課題を解決するための手段】本発明は、無数の凹凸部
及び／又は小孔を有する金属製乱反射材、ガラスウ−ル
マット、ウレタンフォ−ム等の低密度材料製吸音材、鉛
又は銅シ−ト製遮音材、及び構造材をこの順に積層して
成り、前記乱反射材を音源側に配置することを特徴とす
る遮音カバ−材、を以て上記課題を解決した。SUMMARY OF THE INVENTION The present invention relates to a diffused reflection material made of metal having a myriad of irregularities and / or small holes, a sound absorbing material made of a low-density material such as glass wool mat and urethane foam, a lead or copper sheet. The above-mentioned problem has been solved by a sound insulating cover material comprising a laminated sound insulating material and a structural material in this order, wherein the irregularly reflecting material is arranged on the sound source side.
【０００５】[0005]
【発明の実施の形態】本発明の実施の形態を添付図面に
依拠して説明する。本発明に係る遮音カバ−材は、乱反
射材１、吸音材２、遮音材３及び構造材４の４層を積層
して成り、乱反射材１側がエンジン等の音源５に向けら
れる。Embodiments of the present invention will be described with reference to the accompanying drawings. The sound insulation cover material according to the present invention is formed by laminating four layers of a diffuse reflection material 1, a sound absorption material 2, a sound insulation material 3 and a structural material 4, and the diffuse reflection material 1 side is directed to a sound source 5 such as an engine.
【０００６】乱反射材１は、無数の凹凸部及び／又は小
孔を形成した金属板で、凹凸表面と小孔を有するア−ト
メタルや、小孔を有するパンチレグメタル、フックメタ
ル等が用いられる。乱反射材１の厚さは通例０．２〜
１．５ｍｍであるが、好ましくは０．２〜０．３ｍｍと
する。この乱反射材１は、音源５からの騒音を、その凹
凸部ないし小孔で乱反射させることにより減衰させる役
目を果たすと共に、吸音材２を担持する役目を果たす。The irregular reflection material 1 is a metal plate having a myriad of irregularities and / or small holes. Art metal having an irregular surface and small holes, punch leg metal having small holes, and hook metal are used. . The thickness of the irregular reflection material 1 is typically 0.2 to
It is 1.5 mm, preferably 0.2-0.3 mm. The diffusely reflecting material 1 serves to attenuate the noise from the sound source 5 by irregularly reflecting the noise at the uneven portions or small holes, and also to carry the sound absorbing material 2.
【０００７】吸音材２は、比較的厚目で低密度の材料、
例えばガラスウ−ルマット、ロックウ−ルマット等の無
機質材やウレタンフォ−ムやシリコンゴム、スチレン樹
脂等の有機系発泡体（単泡体組織であることが好まし
い。）等を用いる。ガラスウ−ルマットの場合は、通例
５〜３０ｍｍ、好ましくは１０〜２０ｍｍの厚さで５〜
３０ｋｇ／ｍ3 の密度のものを用い、他の発泡体の場合
は、通例５〜３０ｍｍ、好ましくは１０〜２０ｍｍの厚
さで０．０１〜０．０４ｇ／ｃｍ3 の密度のものを用い
る。The sound absorbing material 2 is a relatively thick and low-density material,
For example, inorganic materials such as glass wool mats and rock wool mats, and organic foams (preferably having a single-cell structure) such as urethane foam, silicone rubber, and styrene resin are used. In the case of a glass wool mat, the thickness is usually 5 to 30 mm, preferably 10 to 20 mm.
A foam having a density of 30 kg / m 3 is used. In the case of another foam, a foam having a thickness of usually 5 to 30 mm, preferably 10 to 20 mm and a density of 0.01 to 0.04 g / cm 3 is used.
【０００８】吸音材２は、乱反射材１を透過した音エネ
ルギ−（振動エネルギ−）を吸音（吸振）して、高度の
残響減衰機能を発揮する。また、吸音材２は十分な空気
層を有しているので、断熱効果もある。The sound absorbing material 2 absorbs sound energy (vibration energy) transmitted through the diffusely reflecting material 1 and exhibits a high level of reverberation attenuation function. Further, since the sound absorbing material 2 has a sufficient air layer, it also has a heat insulating effect.
【０００９】遮音材３は、高密度（高比重）の金属系遮
音材で、鉛シ−ト（比重１１．４）又は銅シ−ト（比重
８．９）が適している。それらの厚さは通例０．２〜
１．５ｍｍで、好ましくは０．３ｍｍ〜０．５ｍｍであ
る。この遮音材３は、その素材の高質量則に沿い、音エ
ネルギ−の高い透過損失効果を発揮する。The sound insulating material 3 is a high-density (high specific gravity) metallic sound insulating material, and is suitably made of a lead sheet (specific gravity 11.4) or a copper sheet (specific gravity 8.9). Their thickness is typically 0.2-
1.5 mm, preferably 0.3 mm to 0.5 mm. This sound insulating material 3 exhibits a high transmission loss effect of sound energy in accordance with the high mass rule of the material.
【００１０】構造材４は、本遮音カバ−全体の構造的役
割を果たすもので、曲げ、締め付け、折曲等に追従可能
な金属材、例えば厚さ０．４〜１．０ｍｍ、好ましくは
０．４ｍｍ〜０．８ｍｍのＳＰＣＣを用いる。The structural material 4 plays a structural role of the entire sound insulating cover, and is a metal material capable of following bending, tightening, bending and the like, for example, having a thickness of 0.4 to 1.0 mm, preferably 0 to 1.0 mm. An SPCC of 0.4 mm to 0.8 mm is used.
【００１１】本遮音カバ−材は上記４層を積層して成る
もので、殊に、空気層を有する吸音材２と高密度の金属
材料製の遮音材３の部分において、著しい音エネルギ−
減衰効果を発揮する。即ち、音の伝達は空気や物体の振
動によって行われるのであるから、吸音材２を通過する
際にガラス繊維、空気、ガラス繊維、空気・・・・と無
数に経由することにより、振動の減衰程度が増大する。The present sound insulating cover material is formed by laminating the above four layers. In particular, the sound absorbing material 2 having an air layer and the sound insulating material 3 made of a high-density metal material have a remarkable sound energy.
Exhibits a damping effect. That is, since sound is transmitted by the vibration of air or an object, the vibration is attenuated by passing through a myriad of glass fibers, air, glass fibers, air... The degree increases.
【００１２】また、吸音材２を通過した音エネルギ−は
遮音材３に当たるが、遮音材３の高質量性のために透過
を阻止される。なお、鋼シ−トで以てこの遮音材３と同
程度の透過損失デ−タを得ようとすると、その２〜３倍
の厚さが必要となり、車両用の遮音カバ−としては、重
量も嵩も大きくなるため実用的ではない。The sound energy that has passed through the sound absorbing material 2 impinges on the sound insulating material 3, but is blocked from transmitting because of the high mass of the sound insulating material 3. In order to obtain transmission loss data of the same degree as that of the sound insulating material 3 using a steel sheet, the thickness is required to be two to three times as large as that of the sound insulating material 3. It is not practical because of its bulk.
【００１３】本遮音カバ−においては、有効な吸音、遮
音効果を発揮する上記吸音材２と遮音材３の構成に加
え、その内側、即ち、音源５側に無数の凹凸部及び／又
は小孔を形成した乱反射材１を備えている。音を空気を
介して流動する音体と考えるとき、凹凸面では音が乱反
射し、小孔入口では複雑な挙動を示して消音効果が惹起
される。In this sound insulating cover, in addition to the structure of the sound absorbing material 2 and the sound insulating material 3 exhibiting an effective sound absorbing and sound insulating effect, innumerable uneven portions and / or small holes are provided on the inside thereof, that is, on the sound source 5 side. Is provided. When sound is considered as a sound body flowing through the air, the sound is irregularly reflected on the uneven surface, and a complicated behavior is exhibited at the entrance of the small hole, so that a sound-muffling effect is caused.
【００１４】音源５から発せられた騒音は、先ずこの乱
反射材１で減衰され、その後吸音材２で吸音されると共
に遮音材３で透過を遮止される。従って、本遮音カバ−
材による遮音効果は顕著なものとなることは容易に理解
できよう。The noise emitted from the sound source 5 is first attenuated by the diffusely reflecting material 1, then absorbed by the sound absorbing material 2 and blocked by the sound insulating material 3. Therefore, the sound insulation cover
It can be easily understood that the sound insulation effect of the material becomes remarkable.
【００１５】[0015]
【発明の効果】本発明は上述した通りであって、ディ−
ゼルエンジン等の高騒音機器の遮音カバ−材として最適
なものが得られ、簡易な構成であって、成形加工上、コ
スト上の問題もない効果がある。The present invention is as described above.
An optimum material can be obtained as a sound-insulating cover material for high-noise equipment such as a diesel engine, and has a simple configuration, and has an effect that there is no problem in molding and cost.
【図１】 本発明の実施形態の構成を示す断面図であ
る。FIG. 1 is a cross-sectional view illustrating a configuration of an embodiment of the present invention.
【符号の説明】 １ 乱反射材 ２ 吸音材 ３ 遮音材 ４ 構造材 ５ 音源[Description of Signs] 1 diffusely reflecting material 2 sound absorbing material 3 sound insulating material 4 structural material 5 sound source
Claims (1)
属製乱反射材、ガラスウ−ルマット、ウレタンフォ−ム
等の低密度材料製吸音材、鉛又は銅シ−ト製遮音材、及
び構造材をこの順に積層して成り、前記乱反射材を音源
側に配置することを特徴とする遮音カバ−材。1. A diffused reflecting material made of metal having a myriad of irregularities and / or small holes, a sound absorbing material made of a low density material such as glass wool mat and urethane foam, a sound insulating material made of lead or copper sheet, and a structure. A sound-insulating cover material comprising a plurality of materials laminated in this order, wherein the diffusely reflecting material is disposed on a sound source side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10142353A JP3117951B2 (en) | 1998-05-08 | 1998-05-08 | Sound insulation cover material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10142353A JP3117951B2 (en) | 1998-05-08 | 1998-05-08 | Sound insulation cover material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11324707A true JPH11324707A (en) | 1999-11-26 |
| JP3117951B2 JP3117951B2 (en) | 2000-12-18 |
Family
ID=15313407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10142353A Expired - Lifetime JP3117951B2 (en) | 1998-05-08 | 1998-05-08 | Sound insulation cover material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3117951B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6619425B2 (en) | 2001-07-11 | 2003-09-16 | Tokai Rubber Industries, Ltd. | Soundproof cover |
| JP2007003157A (en) * | 2005-06-27 | 2007-01-11 | Daiken Trade & Ind Co Ltd | Sound-insulating ventilation fan hood |
| JP2009208009A (en) * | 2008-03-04 | 2009-09-17 | Ishikawa Gasket Co Ltd | Insulator for internal-combustion engine and its manufacturing method |
| US7684726B2 (en) | 2006-05-26 | 2010-03-23 | Canon Kabushiki Kaisha | Image forming apparatus having the outer cover including acoustic insulation and heat conductive layers |
| CN102269078A (en) * | 2011-06-30 | 2011-12-07 | 天津雷沃动力股份有限公司 | Laminated noise reduction structure of gear chamber |
| WO2019044460A1 (en) * | 2017-08-28 | 2019-03-07 | ニチアス株式会社 | Heat-insulating sound-absorbing material for transportation equipment |
| CN110580894A (en) * | 2019-09-24 | 2019-12-17 | 哈尔滨工程大学 | Sound baffle composite structure for underwater detection equipment |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104876162B (en) * | 2015-04-22 | 2017-03-01 | 江苏高精机电装备有限公司 | A kind of connecting elements device for suppressing low-frequency noise |
-
1998
- 1998-05-08 JP JP10142353A patent/JP3117951B2/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6619425B2 (en) | 2001-07-11 | 2003-09-16 | Tokai Rubber Industries, Ltd. | Soundproof cover |
| JP2007003157A (en) * | 2005-06-27 | 2007-01-11 | Daiken Trade & Ind Co Ltd | Sound-insulating ventilation fan hood |
| JP4741889B2 (en) * | 2005-06-27 | 2011-08-10 | 大建工業株式会社 | Soundproof ventilation fan hood |
| US7684726B2 (en) | 2006-05-26 | 2010-03-23 | Canon Kabushiki Kaisha | Image forming apparatus having the outer cover including acoustic insulation and heat conductive layers |
| JP2009208009A (en) * | 2008-03-04 | 2009-09-17 | Ishikawa Gasket Co Ltd | Insulator for internal-combustion engine and its manufacturing method |
| CN102269078A (en) * | 2011-06-30 | 2011-12-07 | 天津雷沃动力股份有限公司 | Laminated noise reduction structure of gear chamber |
| WO2019044460A1 (en) * | 2017-08-28 | 2019-03-07 | ニチアス株式会社 | Heat-insulating sound-absorbing material for transportation equipment |
| JP2019038478A (en) * | 2017-08-28 | 2019-03-14 | ニチアス株式会社 | Heat-insulating sound-absorbing material for transport equipment |
| CN110580894A (en) * | 2019-09-24 | 2019-12-17 | 哈尔滨工程大学 | Sound baffle composite structure for underwater detection equipment |
| CN110580894B (en) * | 2019-09-24 | 2024-04-19 | 哈尔滨工程大学 | Acoustic baffle composite structure for underwater detection equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3117951B2 (en) | 2000-12-18 |
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