JPH0352212Y2 - - Google Patents
Info
- Publication number
- JPH0352212Y2 JPH0352212Y2 JP1985129751U JP12975185U JPH0352212Y2 JP H0352212 Y2 JPH0352212 Y2 JP H0352212Y2 JP 1985129751 U JP1985129751 U JP 1985129751U JP 12975185 U JP12975185 U JP 12975185U JP H0352212 Y2 JPH0352212 Y2 JP H0352212Y2
- Authority
- JP
- Japan
- Prior art keywords
- porous
- sound absorbing
- sound
- engine room
- absorbing material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000011358 absorbing material Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 6
- 239000005871 repellent Substances 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 4
- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- 239000011737 fluorine Substances 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 239000011491 glass wool Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000011888 foil Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001846 repelling effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は内燃機関の騒音を吸音するためのエン
ジンルーム用吸音構造に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a sound absorption structure for an engine room for absorbing noise from an internal combustion engine.
従来このような技術の分野に属するものとし
て、本出願人が先に出願した実開昭56−63823号
公報記載の如きものがある。
As a conventional technique belonging to this field, there is a technique described in Japanese Utility Model Application Publication No. 56-63823, which was previously filed by the present applicant.
第２図ａは該従来のエンジンルーム用の吸音構
造を示す一部切欠断面図である。図に示すとおり
従来の吸音構造は、基板１上にグラスウール等の
多数の小孔２ａを有する多孔質性吸音材２をアル
ミニユーム箔３で覆つた構造となつている。 FIG. 2a is a partially cutaway sectional view showing the conventional sound absorbing structure for an engine room. As shown in the figure, the conventional sound absorbing structure has a structure in which a porous sound absorbing material 2, such as glass wool, having a large number of small holes 2a on a substrate 1 is covered with an aluminum foil 3.
しかしながら上記従来例においては、エンジン
ルーム内の火災発生防止のため、燃料を吸収し易
い多孔質性の吸音材をアルミニユーム箔で被覆し
なければならず、該無孔質のアルミニユーム箔で
吸音材を覆うことにより、吸音材の吸音効果を低
下させるという問題点があつた。第２図ｂはその
吸音率特性を示す図で、図示するように吸音率は
特定の周波数点P0を中心にピークを示すが、そ
の前後は吸音率が降下し、全体として吸音効果が
あまり向上しないという欠点がある。
However, in the above conventional example, in order to prevent a fire from occurring in the engine room, the porous sound-absorbing material that easily absorbs fuel must be covered with aluminum foil, and the sound-absorbing material is covered with aluminum foil, which is non-porous. There was a problem in that the covering reduced the sound absorbing effect of the sound absorbing material. Figure 2b is a diagram showing its sound absorption coefficient characteristics.As shown in the figure, the sound absorption coefficient peaks around a specific frequency point P0 , but before and after that the sound absorption coefficient decreases, and the sound absorption effect as a whole becomes less effective. The drawback is that it does not improve.
上記問題点を解決するため本考案は、基板上に
グラスウール等の多孔質性吸音材を配設し、該多
孔質性吸音材の外周表面をフツソ系樹脂等の材質
により構成された多孔質性フイルム材からなる撥
水性、防水性を備えた表面被膜で覆つたエンジン
ルーム用吸音構造にした。
In order to solve the above problems, the present invention provides a porous sound absorbing material such as glass wool on a substrate, and the outer peripheral surface of the porous sound absorbing material is made of a porous material such as a fluorine resin. It has a sound-absorbing structure for the engine room covered with a water-repellent and waterproof surface coating made of film material.
エンジンルーム用吸音構造を上記の如く構成す
ることにより、多孔質性吸音材を撥水性の高い多
孔質のフイルムで被覆するから、吸音率特性が大
幅に向上する。また、吸音材を被覆するフイルム
は撥水性を有するから、外部から侵入する燃料等
の液体を排除するのでエンジンルームの火災等の
点でも優れたものとなる。
By configuring the engine room sound absorbing structure as described above, the porous sound absorbing material is covered with a highly water-repellent porous film, so that the sound absorption coefficient characteristics are significantly improved. Furthermore, since the film covering the sound absorbing material has water repellency, it eliminates liquids such as fuel that enter from the outside, making it excellent in terms of fires in the engine room, etc.
以下、本考案に係るエンジンルーム用吸音構造
について図面に基づいて説明する。
Hereinafter, the sound absorbing structure for an engine room according to the present invention will be explained based on the drawings.
第１図ａは本考案に係るエンジンルーム用吸音
構造を示す一部切欠断面図、第３図は本考案に係
るエンジンルーム用吸音構造に用いる撥水性及び
多孔質性フイルム４の部分拡大図である。 FIG. 1a is a partially cutaway sectional view showing the sound absorbing structure for an engine room according to the present invention, and FIG. 3 is a partially enlarged view of the water-repellent and porous film 4 used in the sound absorbing structure for the engine room according to the present invention. be.
尚、第２図と同一部分には同一符号を付し、そ
の説明は省略する。図に示すとおり、本考案に係
るエンジンルーム用吸音構造は、基板１上の前記
多孔質性吸音材２の外表面を後述する多孔質性フ
イルム４でラミネートして構成されるものであ
る。かかる多孔質性フイルム４は、略100％のフ
ツ素系樹脂を素材に膜状に形成したもので、該他
孔質性フイルム４には１cm2あたり直径略0.6ミク
ロン程の孔４ａが無数に（例えば数億個）形成さ
れている。フツ素系樹脂は固体物質の中でも耐熱
性、耐火性に優れ、さらに極めて高い撥水性を持
ち、水、燃料等の液体５を玉状にして弾くので、
これらの液体５が前記多孔質性吸音材２内に侵入
することを防止する。尚、JIS規格の測定法によ
ると2000mm以上という高耐水度をもつことが知ら
れている。 Note that the same parts as in FIG. 2 are given the same reference numerals, and the explanation thereof will be omitted. As shown in the figure, the sound absorbing structure for an engine room according to the present invention is constructed by laminating the outer surface of the porous sound absorbing material 2 on the substrate 1 with a porous film 4, which will be described later. This porous film 4 is formed into a film shape using approximately 100% fluororesin as a material, and the porous film 4 has countless pores 4a with a diameter of approximately 0.6 microns per cm 2 . (For example, hundreds of millions of pieces) are formed. Fluorine-based resins have excellent heat resistance and fire resistance among solid substances, and also have extremely high water repellency, repelling liquids such as water and fuel in the form of beads.
These liquids 5 are prevented from entering the porous sound absorbing material 2. Furthermore, it is known to have a high water resistance of 2000 mm or more according to the JIS standard measurement method.
従つて、該撥水性及び多孔質性を有するフイル
ム４で多孔質性吸音材２を被覆すると、フイルム
４の撥水作用により多孔質吸音材２に水、燃料等
が侵入せず、しかもフイルム４も多孔質であるか
ら該多孔質性吸音材２の高い吸音率特性を常に一
定に維持させることができることとなる。第１図
ｂはその吸音率特性を示す図で、ある特定の周波
数点P1までは通常の吸音率の向上を示し、以後
広い周波数範囲において高い吸音率特性を維持す
る。 Therefore, when the porous sound-absorbing material 2 is covered with the water-repellent and porous film 4, water, fuel, etc. will not enter the porous sound-absorbing material 2 due to the water-repellent action of the film 4; Since the porous sound absorbing material 2 is also porous, the high sound absorption coefficient characteristics of the porous sound absorbing material 2 can always be maintained constant. FIG. 1b is a diagram showing its sound absorption coefficient characteristics, showing normal improvement in sound absorption coefficient up to a certain frequency point P1 , and thereafter maintaining high sound absorption coefficient characteristics over a wide frequency range.
以上詳細に説明したとおり、本考案に係るエン
ジンルーム用の吸音構造によれば、多孔質性吸音
材の外周表面をフツソ系樹脂等の材質により構成
された多孔質性フイルム材からなる撥水性、防水
性を備えた表面被膜で覆つたので、吸音率特性が
大幅に向上する。しかも該被膜が防水、多孔質で
あることから、外部からの水や燃料等の侵入も防
止することができるという優れた効果を有する。
As explained in detail above, according to the sound absorbing structure for an engine room according to the present invention, the outer peripheral surface of the porous sound absorbing material is made of a porous film material made of a material such as a fluorine-based resin, and has water repellency. Since it is covered with a waterproof surface film, its sound absorption properties are greatly improved. Moreover, since the film is waterproof and porous, it has the excellent effect of preventing water, fuel, etc. from entering from the outside.
第１図ａは本考案に係るエンジンルーム用吸音
構造を示す一部切欠断面図、同図ｂは本考案に係
るエンジンルーム用吸音構造を適用した場合の吸
音率特性を示す図、第２図ａは従来のエンジンル
ーム用の吸音構造を示す一部切欠断面図、第２図
ｂは従来の吸音構造を適用した場合の吸音率特性
を示す図、第３図は本考案に係る多孔質性フイル
ムの部分拡大斜視図である。
図中、１……基板、２……多孔質性吸音材、３
……アルミニユーム箔、４……多孔質性フイル
ム、４ａ……孔。
Fig. 1a is a partially cutaway sectional view showing the sound absorption structure for an engine room according to the present invention, Fig. 1b is a diagram showing the sound absorption coefficient characteristics when the sound absorption structure for an engine room according to the invention is applied, Fig. 2 Figure 2a is a partially cutaway sectional view showing a conventional sound absorption structure for an engine room, Figure 2b is a diagram showing the sound absorption coefficient characteristics when the conventional sound absorption structure is applied, and Figure 3 is a diagram showing the porous structure according to the present invention. FIG. 3 is a partially enlarged perspective view of the film. In the figure, 1...Substrate, 2...Porous sound absorbing material, 3
... Aluminum foil, 4 ... Porous film, 4a ... Hole.
Claims (1)
設したエンジンルーム用吸音構造において、 該多孔質性吸音材の外周表面をフツソ系樹脂等
の材質により構成された多孔質性フイルム材から
なる撥水性、防水性を備えた表面被膜で覆つたこ
とを特徴とするエンジンルーム用吸音構造。[Scope of Claim for Utility Model Registration] In a sound absorbing structure for an engine room in which a porous sound absorbing material such as glass wool is disposed on a substrate, the outer peripheral surface of the porous sound absorbing material is made of a material such as a fluorine-based resin. A sound-absorbing structure for an engine room characterized by being covered with a water-repellent and waterproof surface film made of porous film material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985129751U JPH0352212Y2 (en) | 1985-08-26 | 1985-08-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985129751U JPH0352212Y2 (en) | 1985-08-26 | 1985-08-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6237556U JPS6237556U (en) | 1987-03-05 |
| JPH0352212Y2 true JPH0352212Y2 (en) | 1991-11-12 |
Family
ID=31026604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985129751U Expired JPH0352212Y2 (en) | 1985-08-26 | 1985-08-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0352212Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006240408A (en) * | 2005-03-02 | 2006-09-14 | Hirotani:Kk | Light/sound-absorbing under-cover for automobile |
| JP6474977B2 (en) | 2013-08-30 | 2019-02-27 | 日東電工株式会社 | Waterproof ventilation membrane, waterproof ventilation member, waterproof ventilation structure and waterproof sound-permeable membrane including the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS578729A (en) * | 1980-06-17 | 1982-01-18 | Youda Seisakusho Kk | Apparatus for preparing water added flour |
| JPS58101847A (en) * | 1981-12-10 | 1983-06-17 | Kasai Kogyo Co Ltd | Engine room insulator |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51158035U (en) * | 1975-06-10 | 1976-12-16 | ||
| JPS55139939U (en) * | 1979-03-27 | 1980-10-06 | ||
| JPS5879476U (en) * | 1981-11-25 | 1983-05-28 | トヨタ自動車株式会社 | hood insulator |
-
1985
- 1985-08-26 JP JP1985129751U patent/JPH0352212Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS578729A (en) * | 1980-06-17 | 1982-01-18 | Youda Seisakusho Kk | Apparatus for preparing water added flour |
| JPS58101847A (en) * | 1981-12-10 | 1983-06-17 | Kasai Kogyo Co Ltd | Engine room insulator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6237556U (en) | 1987-03-05 |
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