JP2005145356A - Floor underlay for automobile - Google Patents

Floor underlay for automobile Download PDF

Info

Publication number
JP2005145356A
JP2005145356A JP2003388684A JP2003388684A JP2005145356A JP 2005145356 A JP2005145356 A JP 2005145356A JP 2003388684 A JP2003388684 A JP 2003388684A JP 2003388684 A JP2003388684 A JP 2003388684A JP 2005145356 A JP2005145356 A JP 2005145356A
Authority
JP
Japan
Prior art keywords
floor
shock absorber
automobile
carpet
laying body
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
Application number
JP2003388684A
Other languages
Japanese (ja)
Other versions
JP4437662B2 (en
Inventor
Takahiko Taniguchi
貴彦 谷口
Toshiki Araga
俊貴 荒賀
Toranosuke Kajiwara
虎之介 梶原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hayashi Engineering Inc
Original Assignee
Hayashi Engineering Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hayashi Engineering Inc filed Critical Hayashi Engineering Inc
Priority to JP2003388684A priority Critical patent/JP4437662B2/en
Priority to EP04818884A priority patent/EP1693255A4/en
Priority to US10/579,398 priority patent/US20070080562A1/en
Priority to PCT/JP2004/016950 priority patent/WO2005049386A1/en
Publication of JP2005145356A publication Critical patent/JP2005145356A/en
Application granted granted Critical
Publication of JP4437662B2 publication Critical patent/JP4437662B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Landscapes

  • Passenger Equipment (AREA)
  • Carpets (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Laminated Bodies (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor underlay for an automobile where a carpet is to be laid, capable of enhancing the sound absorbing/shutoff characteristics of a shock absorbing element (tibia pad) which is laid in lamination to the rear surface of the carpet. <P>SOLUTION: The floor underlay for the automobile is composed of the floor carpet to be laid on the floor panel of the automobile and the shock absorbing element to be laid in lamination to the rear surface of the carpet, wherein the shock absorbing element is formed from a number of cylindrical soft resin particles which are put together and molded. The inner surface of each cylindrical resin particle is roughened, and/or the inside diameter of the particle is flattened to an elliptical ratio of 10-70 %, and a majority of the particles are oriented in inclination in the thickness direction of the floor underlay. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、自動車のフロアパネル上に敷設されるフロア敷設体に関する。   The present invention relates to a floor laying body laid on a floor panel of an automobile.

従来から、乗用車等の自動車のフロア部は、フロアパネルの上に内装材としてカーペットを敷設することで意匠性を確保するようにしている。この種のフロアカーペットには、裏面に熱可塑性樹脂の裏打ちをほどこしたタフトカーペットやニードルパンチカーペットが多く用いられる。フロアカーペット裏面の裏打ちを加熱、可塑化させることで賦形性を発現させ、プレス成形によりおよそフロアパネルに沿う形状に立体的に成形してフロアパネル上に敷設するものである。   Conventionally, a floor portion of an automobile such as a passenger car has been designed to ensure design by laying a carpet as an interior material on a floor panel. For this type of floor carpet, tuft carpets and needle punch carpets having a thermoplastic resin backing on the back side are often used. Heating and plasticizing the backing of the back surface of the floor carpet expresses the shapeability, and three-dimensionally forms a shape approximately along the floor panel by press molding and lays on the floor panel.

フロアカーペットを自動車のフロアパネル上に敷設する際、フロアカーペットとフロアパネルの間には、各種の嵩上材を介在、配設することが一般的である（しばしば嵩上材はフロアカーペットの裏面に貼着される）。嵩上材を配設する目的としては、嵩上材がフロアパネルの細かな凹凸を覆ってフロアの平滑性を確保すること、嵩上材にフロアパネル方向から騒音を吸音させることなどがある。これらの目的のために嵩上材の素材は自動車ごとに合わせて各種選択されるが、特に吸音性のためには、多孔質で、適度のクッション性を有する素材が適することから、各種の繊維フェルト類や、樹脂の発泡体が多く用いられている。   When laying a floor carpet on the floor panel of an automobile, it is common to place and arrange various bulking materials between the floor carpet and the floor panel (often the bulking material is the back of the floor carpet). Affixed to). The purpose of disposing the bulking material includes ensuring the smoothness of the floor by covering the fine irregularities of the floor panel, and causing the bulking material to absorb noise from the direction of the floor panel. For these purposes, various materials for the bulk material are selected for each automobile, but for sound absorption, a porous material with appropriate cushioning properties is suitable. Many felts and resin foams are used.

一方で、近年、自動車の衝突事故によって前席乗員が足下から受ける衝撃荷重に対して、この衝撃エネルギの一部を乗員室内にあるフロアカーペットに積層した衝撃吸収体（ティビアパッド）で吸収し、より安全性を高める研究が進められている。
この種の衝撃吸収体は、たとえば、特開平１０−３２９７６２号（特願平９−１３８９１３号）に開示されるように、車体の前席乗員が足を載せる足元部分の、フロアカーペットとフロアパネルの間に介在させるものである。衝撃吸収体は、エネルギ吸収性の素材からなり、嵩上材と並列して配設されることが一般的である。 On the other hand, in recent years, a part of this impact energy is absorbed by the impact absorber (tibia pad) laminated on the floor carpet in the passenger compartment for the impact load that the front seat occupant receives from the feet due to a car crash. Research to improve safety is ongoing.
For example, as disclosed in Japanese Patent Application Laid-Open No. 10-329762 (Japanese Patent Application No. 9-138913), this type of shock absorber includes a floor carpet and a floor panel at a foot portion on which a front seat occupant of the vehicle body places his / her foot. Between the two. The shock absorber is generally made of an energy-absorbing material and is arranged in parallel with the bulking material.

衝撃吸収体としての機能のためには、衝撃吸収体の素材は嵩上材よりも耐圧縮荷重が大きい材料を用いる必要があり、特開平６−１８３２９３号や、特開平９−２２６４３０号に開示されるような いわゆるビーズ発泡成形体を用いる例が多い。
ビーズ発泡成形体は、ポリスチレン樹脂やポリプロピン樹脂の粒子に発泡剤を配合し、所要のキャビティを有する成形型に充填して、蒸気加熱等により個々の粒子を発泡させ、相互に融着させて、成形されるものであり、密度０．０２〜０．０６ｇ／ｃｍ３、圧縮歪み率５０％時の圧縮強度が０．１〜１．５ＭＰａ程度のものが用いられる。
特開平１０−３２９７６２号公報（特願平９−１３８９１３） 特開平６−１８３２９３号公報（特願平３−７３５７９） 特開平９−２２６４３０号公報（特願平８−６１６６４） In order to function as a shock absorber, it is necessary to use a material having a higher compression load than the bulk material as the material of the shock absorber, which is disclosed in JP-A-6-183293 and JP-A-9-226430. There are many examples of using so-called bead foam moldings.
The bead foam molded body is made by blending a foaming agent with polystyrene resin or polypropyne resin particles, filling a mold having a required cavity, foaming individual particles by steam heating, etc., and fusing them together. It is molded and has a density of 0.02 to 0.06 g / cm 3 and a compressive strength of about 0.1 to 1.5 MPa when the compressive strain rate is 50%.
Japanese Patent Laid-Open No. 10-329762 (Japanese Patent Application No. 9-138913) JP-A-6-183293 (Japanese Patent Application No. 3-73579) Japanese Patent Application Laid-Open No. 9-226430 (Japanese Patent Application No. 8-61664)

上記のように、フロアカーペットの裏面の一部に、衝撃吸収体を配設した場合、一般にビーズ発泡成形体からなる衝撃吸収体の部分は並列する他の嵩上材と比較して音波の吸音性に劣る構成になり、結果、フロアパネル方向から入射してくるロードノイズや、ダッシュパネル方向から入射してくるエンジンノイズが衝撃吸収体を配した部位から乗員室内に侵入する比率が高く、乗員室内の静粛性の確保に関する課題となっている。
本発明は、この課題を解決するものであり、吸、遮音性にすぐれた衝撃吸収体（ティビアパッド）の構造を提供する。 As described above, when the shock absorber is disposed on a part of the back surface of the floor carpet, the shock absorber generally made of a foamed bead is generally sound-absorbing compared to other bulky materials in parallel. As a result, the ratio of road noise entering from the floor panel direction and engine noise entering from the dash panel direction to the passenger compartment from the part where the shock absorber is arranged is high. This is a problem related to ensuring quietness in the room.
The present invention solves this problem and provides a structure of an impact absorber (tibia pad) excellent in absorption and sound insulation.

課題を解決する本発明の手段は、自動車のフロアパネル上に敷設されるフロアカーペットと、フロアカーペットの裏面に積層配設される衝撃吸収体とからなる自動車用フロア敷設体であって、前記衝撃吸収体が、多数の筒状軟質樹脂粒子を集合成形してなるものであることを特徴とする、自動車用フロア敷設体による。   The means of the present invention for solving the problem is an automobile floor laying body comprising a floor carpet laid on a floor panel of an automobile, and an impact absorber laminated on the back surface of the floor carpet, According to an automobile floor laying body, wherein the absorbent body is formed by collectively molding a large number of cylindrical soft resin particles.

本発明では、衝撃吸収体が多数の筒状軟質樹脂粒子を集合成形してなることにより、全体として多孔質に形成することができ、ロードノイズやエンジンノイズ等の侵入音波を内側に取り込んで乱反射させ、エネルギーを吸収する性能（吸音性能）にすぐれるものである。また、衝撃吸収体としての緩衝性能は従来の衝撃吸収体と同等に維持することが可能である。   In the present invention, the shock absorber is formed by collectively molding a large number of cylindrical soft resin particles, so that it can be formed to be porous as a whole, and intrusion sound waves such as road noise and engine noise are taken inwardly and diffusely reflected. It has excellent performance for absorbing energy (sound absorption performance). Further, the shock absorbing performance as the shock absorber can be maintained equivalent to that of the conventional shock absorber.

以下、図面を参照して本発明の好適の実施の形態を説明する。   Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

図１は、前後の座席を有する乗用自動車のフロアのうち、前席乗員の足下部を示した模式断面図である。前席乗員の足下部では、フロアパネルＰは、平坦部 Ｐ０からエンジンルームとの境界に立壁部 Ｐ１が立ち上る構成になっている。この部位では、フロアパネルの平坦部 Ｐ０からは、ロードノイズＮ０が多く侵入し、フロアパネルの立壁部 Ｐ１からは、エンジンノイズＮ１が多く侵入する傾向があり、また、自動車の前方からの衝突事故では、フロアパネルの平坦部 Ｐ０と立壁部 Ｐ１の境界近傍が、斜め上後方に突き上げられ、乗員Ｍの足下に強い衝撃が作用する可能性がある。 FIG. 1 is a schematic cross-sectional view showing a lower leg portion of a front seat occupant in a passenger car floor having front and rear seats. The foot bottom of the front seat occupants, floor panel P is made from the flat portion P 0 in the boundary wall part P 1 is rises the structure of the engine room. In this portion, there is a tendency that a lot of road noise N 0 enters from the flat portion P 0 of the floor panel, and a lot of engine noise N 1 enters from the standing wall portion P 1 of the floor panel. In the collision accident from, the vicinity of the boundary between the flat part P 0 and the standing wall part P 1 of the floor panel is pushed up diagonally upward and rearward, and a strong impact may be applied to the foot of the occupant M.

本発明では、フロアパネルの平坦部 Ｐ０から立壁部 Ｐ１にわたって内装材として意匠性のフロアカーペット１０を敷設して室内を装飾し、また、フロアカーペット１０の裏面に衝撃吸収体２０と吸音性の嵩上材３０とを隣接して配置したフロア敷設体１としている。 特にフロアパネルの平坦部 Ｐ０と立壁部 Ｐ１の境界部近傍から前方には衝撃吸収体２０を、その他の部位には吸音性の嵩上材３０（フェルト類）を配設するものである。 In the present invention, a floor carpet 10 having a design property is laid as an interior material from the flat portion P 0 to the standing wall portion P 1 of the floor panel to decorate the interior, and the shock absorber 20 and the sound absorbing property are provided on the back surface of the floor carpet 10. The floor laying body 1 is disposed adjacent to the bulk material 30. In particular, the shock absorber 20 is disposed forward from the vicinity of the boundary between the flat portion P 0 and the standing wall portion P 1 of the floor panel, and the sound-absorbing bulk material 30 (felts) is disposed in other portions. .

フロアカーペット１０は、基布に立毛パイルを組織したタフトカーペットや、不織ウェブをニードリングして繊維相互を絡め形成したニードルパンチカーペット等である。フロアカーペット１０の裏面には低密度ポリエチレン、エチレン酢酸ビニル等の低融点の熱可塑性樹脂からなる薄いシートを裏打ちしてなり、裏打ち１０ａを加熱、可塑化させた状態で所要の形状にプレス成形することで、自動車のフロアパネルＰに沿う形状に賦形されるものである。裏打ち１０ａはまた、フロアカーペット１０の裏面に衝撃吸収体２０や嵩上材３０を積層する際に、これを貼着する接着剤の役割も果たす。   The floor carpet 10 is a tufted carpet in which napped piles are organized on a base fabric, a needle punched carpet formed by interlacing fibers by needling a nonwoven web. The back surface of the floor carpet 10 is backed with a thin sheet made of a low-melting-point thermoplastic resin such as low-density polyethylene or ethylene vinyl acetate, and the backing 10a is heated and plasticized to be pressed into a required shape. Thus, it is shaped into a shape along the floor panel P of the automobile. The backing 10 a also serves as an adhesive for adhering the impact absorber 20 and the bulk material 30 on the back surface of the floor carpet 10.

嵩上材３０は、多孔質で高吸音性のものであり、各種の繊維フェルトが最も適する。好ましい例としては、繊維径が１〜５ｄ、繊維長が２０〜７０ｍｍのポリエステル繊維を集積し、部分的に繊維相互を融着して密度０．０４〜０．１ｇ／ｃｍ３に形成した合繊フェルトがある。 衝撃吸収体２０と嵩上材３０は、ともにフロアカーペット１０の裏面にフロアカーペットの裏打ち１０ａを介して貼着されていることが適する。この際、衝撃吸収体２０と嵩上材３０の間の隙間が小さいことが好ましく、隙間からの音の侵入を防止することができる。
The bulk material 30 is porous and has a high sound absorption property, and various types of fiber felt are most suitable. As a preferable example, a synthetic fiber in which polyester fibers having a fiber diameter of 1 to 5d and a fiber length of 20 to 70 mm are collected and partially fused to form a density of 0.04 to 0.1 g / cm 3. There is a felt. Both the impact absorber 20 and the bulk material 30 are suitably attached to the back surface of the floor carpet 10 via a floor carpet backing 10a. At this time, it is preferable that the gap between the shock absorber 20 and the bulking material 30 is small, and sound can be prevented from entering through the gap.

本発明に用いる衝撃吸収体２０は、多数の筒状軟質樹脂粒子２１（図２）を集合成形してなるものである。個々の筒状軟質樹脂粒子２１は、熱可塑性のポリプロピレン樹脂や、ポリスチレン樹脂に発泡剤を含ませた状態で、微小な筒状に形成してなるもので、内径ｄが２．０〜４．０ｍｍ、外径Ｄが４〜６ｍｍ、長さＬが３〜６ｍｍ程のものである。代表的な製品名としては、株式会社ジェイ エス ピー 製のポーラスＥＰＰがある。   The shock absorber 20 used in the present invention is formed by collectively molding a large number of cylindrical soft resin particles 21 (FIG. 2). The individual cylindrical soft resin particles 21 are formed in a minute cylindrical shape in a state where a foaming agent is included in a thermoplastic polypropylene resin or polystyrene resin, and an inner diameter d is 2.0-4. 0 mm, outer diameter D is 4 to 6 mm, and length L is about 3 to 6 mm. As a typical product name, there is a porous EPP manufactured by JSP Co., Ltd.

上記の筒状軟質樹脂発泡粒子２１を多数、所要のキャビティを有する成形型に充填し、蒸気等により加熱することで、その表面を微溶融状態において粒子相互を融着させることで、集合成形することができる。得られた成形体の密度は、０．０３〜０．０５ｇ／ｃｍ３であり、適度の柔軟性を有し、ティビアパッドとして適した衝撃吸収性能が得られる。本発明において個々の筒状軟質樹脂粒子は、以下の特徴づけをおこなうことが好ましい。 A large number of the above-mentioned cylindrical soft resin expanded particles 21 are filled in a mold having a required cavity, and heated by steam or the like, whereby the surfaces are fused together in a micro-molten state to perform collective molding. be able to. The density of the obtained molded body is 0.03 to 0.05 g / cm 3 , has moderate flexibility, and provides an impact absorbing performance suitable as a tibia pad. In the present invention, the individual cylindrical soft resin particles are preferably characterized as follows.

（１）筒内側の粗面化
図２に示すように、筒状軟質樹脂粒子２１の筒内側に凹凸模様２１ａを形成するなどして、筒内側を粗面化しておくと、吸音性が高まり好ましいこと（乱反射の増加効果）を実験により確認した。 (1) Roughening of the inner side of the cylinder As shown in FIG. 2, if the inner surface of the cylinder is roughened by forming an uneven pattern 21 a on the inner side of the cylindrical soft resin particle 21, the sound absorbing property is increased. What was preferable (the effect of increasing diffuse reflection) was confirmed by experiments.

ポリプロピレン樹脂製の筒状軟質樹脂（外径Ｄ＝６．０ｍｍ、内径ｄ＝４．０ｍｍ、長さＬ＝４．０ｍｍ）の内側に、半径０．１ｍｍの凹凸模様を均一に形成して筒内側を粗面化した粒子の成形体（厚さ２０ｍｍ、密度０．０４ｇ／ｃｍ３、通気度は４４ｃｃ／ｃｍ２／ｓ）を実施例吸音体とし、比較例として、実施例と同じ樹脂、サイズの粒子の筒状軟質樹脂粒子の筒内側を平滑にした粒子の成形体（厚さ２０ｍｍ、密度０．０４ｇ／ｃｍ３、通気度は４１ｃｃ／ｃｍ２／ｓ）を比較例吸音体として、垂直入射吸音率のちがいを測定評価した。結果、図３に示すように、実施例のように筒内側を粗面化して、通気抵抗を高めた筒状軟質樹脂粒子で成形した吸音体の吸音率が各周波数域で、比較例を上回り筒内側の粗面化による吸音性の向上効果が確認できた。 A cylindrical soft resin made of polypropylene resin (outer diameter D = 6.0 mm, inner diameter d = 4.0 mm, length L = 4.0 mm) is uniformly formed with an uneven pattern with a radius of 0.1 mm inside the cylinder. The molded body (thickness 20 mm, density 0.04 g / cm 3 , air permeability 44 cc / cm 2 / s) having a roughened inner surface was used as an example sound absorber, and as a comparative example, the same resin as the example, A molded article of particles (thickness 20 mm, density 0.04 g / cm 3 , air permeability 41 cc / cm 2 / s) obtained by smoothing the inside of cylindrical soft resin particles of size particles as a comparative sound absorber, The difference in normal sound absorption coefficient was measured and evaluated. As a result, as shown in FIG. 3, the sound absorption coefficient of the sound absorber formed by cylindrical soft resin particles with a roughened cylinder inner surface and increased airflow resistance as in the example exceeds the comparative example in each frequency range. The sound absorption improvement effect by the roughening inside the cylinder was confirmed.

（２）筒内径の偏平化
図２に示すように、筒状軟質樹脂粒子２１の筒内径を偏平化 （楕円率＝（長径ｄ１−短径ｄ２）／長径ｄ１）することにより、吸音性が高まり好ましいこと（通気抵抗を高める効果）を実験により確認した。 (2) Flattening of the cylindrical inner diameter As shown in FIG. 2, by flattening the cylindrical inner diameter of the cylindrical soft resin particles 21 (ellipticity = (major axis d 1 −minor axis d 2 ) / major axis d 1 ), It was confirmed by experiments that sound absorption is increased and preferable (effect of increasing ventilation resistance).

ポリプロピレン樹脂製の筒状軟質樹脂（外径Ｄ＝６．０ｍｍ、内径ｄ１＝４．０ｍｍ、長さＬ＝４．０ｍｍ）を偏平化し、内径の（長径ｄ１−短径ｄ２）／長径ｄ１で定義される楕円率を １００％未満に偏平化した各粒子を用いて、各実施例吸音体（厚さ２０ｍｍ、密度０．０４ｇ／ｃｍ３、通気度は４０〜５０ｃｃ／ｃｍ２／ｓ）を成形し、垂直入射吸音率（１０００〜６３００Ｈｚ平均）のちがいを測定評価した。 結果、図４に示すように、楕円率を１０〜７０％、程度にすることにより楕円率が０％の粒子を成形するのと比較して吸音率が高められる効果が確認できた。 A cylindrical soft resin made of polypropylene resin (outer diameter D = 6.0 mm, inner diameter d 1 = 4.0 mm, length L = 4.0 mm) is flattened, and the inner diameter (major axis d 1 -minor axis d 2 ) / Using each particle having an ellipticity defined by the major axis d 1 flattened to less than 100%, each example sound absorber (thickness 20 mm, density 0.04 g / cm 3 , air permeability 40 to 50 cc / cm 2) / S) was molded, and the difference in normal incident sound absorption coefficient (1000 to 6300 Hz average) was measured and evaluated. As a result, as shown in FIG. 4, the effect of increasing the sound absorption rate was confirmed by setting the ellipticity to about 10 to 70%, compared to molding particles with an ellipticity of 0%.

（３）筒状軟質粒子の傾斜配列
ポリプロピレン樹脂製の筒状軟質樹脂（外径Ｄ＝６．０ｍｍ、内径ｄ＝４．０ｍｍ、長さＬ＝４．０ｍｍ）を、図５に示すように、衝撃吸収体内において配列して、実施例、および比較例１、２の衝撃吸収体（厚さ２０ｍｍ、密度０．０４ｇ／ｃｍ３）を成形し、垂直入射吸音率のちがいを測定評価した。
このうち、実施例は、各筒状軟質樹脂粒子の過半がフロア敷設体の厚さ方向に対して傾斜して配列している例であり、傾斜角度はランダムに０度以上、９０度未満（平均傾斜角度４５度）においている。これに対して比較例１は、各筒状軟質樹脂粒子の過半をフロア敷設体の厚さ方向に対して平行に揃えて配列している例であり、比較例２は、逆に各筒状軟質粒子の過半をフロア敷設体の厚さ方向に対して垂直に揃えて配列している例である。
結果、図６に示すように、実施例の配列が最も吸音率が高められ、ついで比較例１、比較例２の順に吸音率が低下することが確認できた。比較例２の配列では筒状軟質樹脂粒子内に音波を取り込み難いために吸音率が低下する。また、比較例１の配列では音波が筒状軟質樹脂粒子の内壁に反射する比率が少なくなるため、吸音率が低下すると考えられる。 (3) Inclined arrangement of cylindrical soft particles A cylindrical soft resin (outer diameter D = 6.0 mm, inner diameter d = 4.0 mm, length L = 4.0 mm) made of polypropylene resin is shown in FIG. The impact absorbers of Example and Comparative Examples 1 and 2 (thickness 20 mm, density 0.04 g / cm 3 ) were molded in an impact absorber, and the difference in normal incident sound absorption coefficient was measured and evaluated.
Among these, the example is an example in which a majority of each cylindrical soft resin particle is arranged to be inclined with respect to the thickness direction of the floor laying body, and the inclination angle is randomly 0 degree or more and less than 90 degrees ( The average inclination angle is 45 degrees). On the other hand, Comparative Example 1 is an example in which a majority of each cylindrical soft resin particle is arranged in parallel with the thickness direction of the floor laying body, and Comparative Example 2 is conversely each cylindrical. This is an example in which a majority of soft particles are aligned perpendicular to the thickness direction of the floor laying body.
As a result, as shown in FIG. 6, it was confirmed that the arrangement of the example had the highest sound absorption rate, and then the sound absorption rate decreased in the order of Comparative Example 1 and Comparative Example 2. In the arrangement of Comparative Example 2, it is difficult to capture sound waves into the cylindrical soft resin particles, so that the sound absorption rate is lowered. Moreover, in the arrangement | sequence of the comparative example 1, since the ratio which a sound wave reflects on the inner wall of a cylindrical soft resin particle decreases, it is thought that a sound absorption factor falls.

図７には、上記（１）〜（３）に記載の、「筒内側の粗面化」、「筒内径の偏平化」、「傾斜配列」をすべておこなったポリプロピレン樹脂製の筒状軟質樹脂（外径Ｄ＝６．０ｍｍ、内径ｄ１＝４．０ｍｍ、楕円率３０％、長さＬ＝４．０ｍｍ、）の成形体（厚さ２０ｍｍ、密度０．０４ｇ／ｃｍ３）を実施例として、垂直入射吸音率を測定評価した。
この実施例では、複合効果により上記（１）〜（３）の各実施例を上回る最もすぐれた吸音率を観測した。なお、同図中の比較例は、形状が筒状でなく、球形に近い軟質樹脂粒子からなる衝撃吸収体として、実施例と同形状、同密度に成形して同じく垂直入射吸音率を測定したものであり、音波の吸収性が非常に劣ることが示される。 In FIG. 7, a cylindrical soft resin made of polypropylene resin that has been subjected to all of the “roughening of the inner surface of the cylinder”, “flattening of the inner diameter of the cylinder”, and “inclined arrangement” described in (1) to (3) above. Example (Outer diameter D = 6.0 mm, inner diameter d 1 = 4.0 mm, ellipticity 30%, length L = 4.0 mm) (thickness 20 mm, density 0.04 g / cm 3 ) The normal incident sound absorption coefficient was measured and evaluated.
In this example, the best sound absorption rate over each of the above examples (1) to (3) was observed due to the combined effect. In the comparative example in the figure, the shape of the shock absorber made of soft resin particles close to a spherical shape is not cylindrical. It is shown that the sound wave absorbency is very inferior.

以上の吸音率の測定をとおして、衝撃吸収体２０に高い吸音性を発現させるためには２．０ｃｃ／ｃｍ２／ｓ以上の通気度があることが好ましいことがわかった。 一方、この衝撃吸収体をフロアカーペットの裏面に積層配設した状態での通気度は、小さいことが好ましく、０〜９０ｃｃ／ｃｍ２／ｓ未満であることが適する。これは、遮音における古典的な二重壁理論により説明される効果が発現し、すなわち、自動車のフロアパネル方向からの騒音の入射に対して、フロアパネルが第１の遮音壁となり、衝撃吸収体を介して所定の距離を確保したフロアカーペットの裏面が第２の遮音壁となり、すぐれた遮音性を発現するためである。 Through the above measurement of the sound absorption coefficient, it was found that the air permeability of 2.0 cc / cm 2 / s or more is preferable in order for the shock absorber 20 to exhibit high sound absorption. On the other hand, the air permeability in a state where the shock absorber is laminated on the back surface of the floor carpet is preferably small, and is preferably less than 0 to 90 cc / cm 2 / s. This produces the effect explained by the classical double wall theory in sound insulation, that is, the floor panel becomes the first sound insulation wall against the incidence of noise from the direction of the automobile floor panel, and the shock absorber is This is because the back surface of the floor carpet that secures a predetermined distance through the second wall becomes the second sound insulation wall, and exhibits excellent sound insulation.

（試験車両、評価方法）
試験車両として、エンジン排気量１０００ｃｃのセダン型乗用自動車を用い、以下の実施例および比較例のフロア敷設材を敷設し、シャシーダイナモ装置を用いて試験車両の実車走行状態（スムース路、１００ｋｍ／ｈ 定速走行状態）を再現し、この際に試験車両の乗員室内で観測される騒音レベルを測定することによって、実施例および比較例フロア敷設材の遮音性能を比較評価した。 (Test vehicle, evaluation method)
As a test vehicle, a sedan type passenger car with an engine displacement of 1000 cc is used, and floor laying materials of the following examples and comparative examples are laid, and the test vehicle is in a running state (smooth road, 100 km / h) using a chassis dynamo device. The sound insulation performance of the Example and Comparative Example floor laying materials was comparatively evaluated by measuring the noise level observed in the passenger compartment of the test vehicle.

（フロア敷設材構成）
フロアカーペットは、基布にＰＥＴ繊維のパイルをタフト組織して形成されたタフテッドカーペット（単位面積重量６５０ｇ／ｍ２）を用い、裏面にポリエチレン樹脂のシート状に裏打ち（２００ｇ／ｍ２）をほどこし、略試験車両のフロアパネルに沿う形状に賦形した。このフロアカーペットの通気度は、０ｃｃ／ｃｍ２／ｓである。フロアカーペットの裏面には、平面部から立壁部にわたって、厚さ３０ｍｍの衝撃吸収体を、投影面積０．１５ｍ２に配設し、実施例および比較例の衝撃吸収体は、上記図７の垂直入射吸音率の測定に用いた衝撃吸収体に相当するものとした。また、この衝撃吸収体に隙間なく隣接して後方の平坦部には厚さ２０ｍｍの合繊フェルト（ＰＥＴ繊維製、繊維径３〜６ｄ、平均繊維長２０〜７０ｍｍ）を投影面積０．５０ｍ２に配設した。 (Floor laying material composition)
The floor carpet uses a tufted carpet (unit area weight 650 g / m 2 ) formed by tufting a pile of PET fibers on the base fabric, and a back surface (200 g / m 2 ) in the form of a polyethylene resin sheet. The shape was roughly shaped along the floor panel of the test vehicle. The air permeability of this floor carpet is 0 cc / cm 2 / s. On the back surface of the floor carpet, a shock absorber having a thickness of 30 mm is disposed in a projected area of 0.15 m 2 from the flat surface portion to the standing wall portion. It corresponded to the impact absorber used for the measurement of incident sound absorption coefficient. Further, a synthetic felt of 20 mm thickness (made of PET fiber, fiber diameter of 3 to 6 d, average fiber length of 20 to 70 mm) is adjacent to the shock absorber without any gap and on the rear flat part to a projected area of 0.50 m 2 . Arranged.

上記試験車両での測定の結果、会話明瞭度を示すＡＩ値（Articulation Index）として比較評価した結果、エンジンノイズに対して実施例が比較例を０．８ポイント上回り、ロードノイズに対して実施例が比較例に対して１．９ポイント上回ることが確認された。   As a result of the measurement with the test vehicle, as a result of comparative evaluation as an AI value (Articulation Index) indicating conversation intelligibility, the example exceeded 0.8 points for the engine noise and the example for road noise. It was confirmed that exceeded 1.9 points with respect to the comparative example.

図８は、図１におけるフロア敷設材の衝撃吸収体積層部の拡大図であり、本発明の別の実施態様を示す。この例では、衝撃吸収体２０’ のフロアパネルに面する裏面２０ａ’ を粗面化している。衝撃吸収体の裏面を（深さ数ミリに）粗面化することにより 衝撃吸収体内への音波の進入面積を増やすとともに、衝撃吸収体とフロアパネルの接触面積を低下させて、こすれ音の発生を抑止する効果もある。 粗面化の手法としては、衝撃吸収体２０’ の成形時に型形状によって形成する方法が好ましい。   FIG. 8 is an enlarged view of the shock absorber laminated portion of the floor laying material in FIG. 1 and shows another embodiment of the present invention. In this example, the back surface 20a 'facing the floor panel of the shock absorber 20' is roughened. By roughening the back surface of the shock absorber (to a depth of several millimeters), the area of sound waves entering the shock absorber is increased and the contact area between the shock absorber and the floor panel is reduced to generate rubbing noise. It also has the effect of deterring. As a roughening method, a method of forming by a mold shape when the shock absorber 20 'is formed is preferable.

図９は、図１におけるフロア敷設材の衝撃吸収体積層部の拡大図であり、本発明のまた別の実施態様を示す。この例では、衝撃吸収体２０” のフロアパネルに面する裏面２０ａ” を凹凸形状に形成し、さらにこの凹凸形状を埋める形にフェルト２２を積層重畳している。
この構造の場合、まず、衝撃吸収体を凹凸形状とすることで、衝撃吸収体の表面積が増加し、音波の進入面積の増加につながるので吸音性が向上する。衝撃吸収体の表面積を増すためには、凹凸形状の凸部を台形形状にすることがさらに好ましい。
この構造ではさらに、衝撃吸収体２０”とフェルト２２の吸音特性が組み合わされて、高い吸音性が発現する。また、衝撃吸収体とフロアパネル間のこすれ音も完全に無くすことができる。
衝撃吸収体２０” とフェルト２２は接着剤や熱融着により接着することが可能であり、また衝撃吸収体２０” の成形時にフェルト２２ を一体化することも可能である。 FIG. 9 is an enlarged view of the shock absorber laminated portion of the floor laying material in FIG. 1 and shows another embodiment of the present invention. In this example, the back surface 20a "facing the floor panel of the shock absorber 20" is formed in a concavo-convex shape, and the felt 22 is laminated and superimposed so as to fill the concavo-convex shape.
In the case of this structure, first, by making the shock absorber uneven, the surface area of the shock absorber is increased, leading to an increase in the sound wave entry area, so that sound absorption is improved. In order to increase the surface area of the shock absorber, it is more preferable that the concavo-convex convex portion is trapezoidal.
In this structure, the sound absorbing characteristics of the shock absorber 20 ″ and the felt 22 are combined to achieve high sound absorption. Further, the rubbing sound between the shock absorber and the floor panel can be completely eliminated.
The shock absorber 20 "and the felt 22 can be bonded by an adhesive or heat fusion, and the felt 22 can be integrated when the shock absorber 20" is molded.

本発明のフロア敷設体を自動車のフロアパネル上に敷設した状態を示す模式断面図を示す。The schematic cross section which shows the state which laid the floor laying body of this invention on the floor panel of the motor vehicle is shown. 筒状軟質樹脂粒子の外観図を示す。The external view of a cylindrical soft resin particle is shown. 筒状軟質樹脂粒子の筒内側の粗面化による吸音率の変化を確認する実験結果を示すグラフを示す。The graph which shows the experimental result which confirms the change of the sound absorption rate by the roughening of the cylinder inner side of a cylindrical soft resin particle is shown. 筒状軟質樹脂粒子の筒内径の楕円化による吸音率の変化を確認する実験結果を示すグラフを示す。The graph which shows the experimental result which confirms the change of the sound absorption rate by ovalization of the cylinder internal diameter of a cylindrical soft resin particle is shown. 衝撃吸収体内における筒状軟質樹脂粒子の配列状態の模式図を示す。The schematic diagram of the arrangement | sequence state of the cylindrical soft resin particle in a shock absorber is shown. 筒状軟質樹脂粒子の配列による吸音率の変化を確認する実験結果を示すグラフを示す。The graph which shows the experimental result which confirms the change of the sound absorption rate by the arrangement | sequence of a cylindrical soft resin particle is shown. 効果を複合した、衝撃吸収体による吸音率の測定結果を示す。The measurement result of the sound absorption coefficient by the impact absorber which combined the effect is shown. 衝撃吸収体積層部の拡大図−別の実施態様を示す。Enlarged view of impact absorber laminate-shows another embodiment. 衝撃吸収体積層部の拡大図−また別の実施態様を示す。An enlarged view of the shock absorber laminate-shows another embodiment.

符号の説明Explanation of symbols

１ フロア敷設体
１０ フロアカーペット
１０ａ 裏打ち
２０ 衝撃吸収体（ティビアパッド）
２１ 筒状軟質樹脂粒子
Ｄ：外径、ｄ：内径、Ｌ：長さ
３０ 嵩上材（フェルト）
Ｐ フロアパネル
Ｐ０ 平坦部
Ｐ１ 立壁部
Ｍ 前席乗員
Ｎ、ｎ 音波（ノイズ）の進行方向、大きさを示す
Ｎ０ ロードノイズ等の騒音
Ｎ１ エンジンノイズ等の騒音 1 Floor laying body 10 Floor carpet 10a Backing 20 Shock absorber (Tibia pad)
21 cylindrical soft resin particles D: outer diameter, d: inner diameter, L: length 30 Bulk material (felt)
P Floor panel P 0 Flat part P 1 Standing wall part M Front seat occupant N, n Noise direction such as N 0 road noise indicating the direction and magnitude of sound waves (noise) N 1 Noise such as engine noise

Claims (8)

自動車のフロアパネル上に敷設されるフロアカーペットと、フロアカーペットの裏面に積層配設される衝撃吸収体とからなる自動車用フロア敷設体であって、前記衝撃吸収体が、多数の筒状軟質樹脂粒子を集合成形してなるものであることを特徴とする、自動車用フロア敷設体。   An automotive floor laying body comprising a floor carpet laid on a floor panel of an automobile and a shock absorber laminated on the back surface of the floor carpet, wherein the shock absorber comprises a number of cylindrical soft resins. A floor laying body for automobiles, characterized in that it is formed by collectively molding particles. 前記筒状軟質樹脂粒子の筒内側が、粗面化されていることを特徴とする、請求項１に記載の自動車用フロア敷設体。   The floor laying body for automobiles according to claim 1, wherein the cylinder inner side of said cylindrical soft resin particles is roughened. 前記筒状軟質樹脂粒子の筒内径が、１０〜７０％の楕円率に偏平化されていることを特徴とする、請求項１に記載の自動車用フロア敷設体。   2. The automobile floor laying body according to claim 1, wherein the cylindrical inner diameter of the cylindrical soft resin particles is flattened to an ellipticity of 10 to 70%. 前記衝撃吸収体の筒状軟質樹脂粒子の過半が、フロア敷設体の厚さ方向に傾斜して配列していることを特徴とする、請求項１に記載の自動車用フロア敷設体。   2. The automotive floor laying body according to claim 1, wherein a majority of the cylindrical soft resin particles of the shock absorber are arranged to be inclined in the thickness direction of the floor laying body. 前記衝撃吸収体が２．０ｃｃ／ｃｍ２／ｓ以上の通気度を有することを特徴とする、請求項１〜４に記載の自動車用フロア敷設体。 The automobile floor laying body according to claim 1, wherein the shock absorber has an air permeability of 2.0 cc / cm 2 / s or more. 前記衝撃吸収体と、前記フロアカーペットの積層の通気度が、０〜９０ｃｃ／ｃｍ２／ｓ未満であることを特徴とする、請求項１に記載の自動車用フロア敷設材。 2. The automobile floor laying material according to claim 1, wherein an air permeability of the impact absorber and the floor carpet is 0 to less than 90 cc / cm 2 / s. 前記衝撃吸収体のフロアパネルに面する裏面を粗面に形成したことを特徴とする、請求項１に記載の自動車用フロア敷設体。   The automobile floor laying body according to claim 1, wherein a rear surface of the shock absorber facing the floor panel is formed into a rough surface. 前記衝撃吸収体のフロアパネルに面する裏面を凹凸状に形成し、フェルトを積層重畳することを特徴とする、請求項１に記載の自動車用フロア敷設体。   2. The automobile floor laying body according to claim 1, wherein a rear surface of the shock absorber facing the floor panel is formed in a concavo-convex shape, and felt is laminated and superimposed.
JP2003388684A 2003-11-19 2003-11-19 Automotive floor laying body Expired - Lifetime JP4437662B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2003388684A JP4437662B2 (en) 2003-11-19 2003-11-19 Automotive floor laying body
EP04818884A EP1693255A4 (en) 2003-11-19 2004-11-15 Impact absorbing body
US10/579,398 US20070080562A1 (en) 2003-11-19 2004-11-15 Impact absorbing body
PCT/JP2004/016950 WO2005049386A1 (en) 2003-11-19 2004-11-15 Impact absorbing body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003388684A JP4437662B2 (en) 2003-11-19 2003-11-19 Automotive floor laying body

Publications (2)

Publication Number Publication Date
JP2005145356A true JP2005145356A (en) 2005-06-09
JP4437662B2 JP4437662B2 (en) 2010-03-24

Family

ID=34695642

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003388684A Expired - Lifetime JP4437662B2 (en) 2003-11-19 2003-11-19 Automotive floor laying body

Country Status (1)

Country Link
JP (1) JP4437662B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006088737A (en) * 2004-09-21 2006-04-06 Hayashi Telempu Co Ltd Shock absorbing structure and its manufacturing method
JP2010116152A (en) * 2009-12-18 2010-05-27 Sekisui Plastics Co Ltd Vehicular floor spacer
WO2023181566A1 (en) * 2022-03-22 2023-09-28 林テレンプ株式会社 Vehicle floor carpet

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48105214U (en) * 1972-03-13 1973-12-07
JPS61235278A (en) * 1984-11-26 1986-10-20 Ikeda Bussan Co Ltd Floor structure for vehicle, and the like
JPS62184947A (en) * 1986-02-10 1987-08-13 Eiji Adachi Laminated interior trim
JPH0512268U (en) * 1991-07-31 1993-02-19 日産車体株式会社 Front floor structure in the passenger compartment
JPH06183293A (en) * 1991-01-17 1994-07-05 Hayashi Gijutsu Kenkyusho:Kk Floor carpet for automobile
JPH0924757A (en) * 1995-07-10 1997-01-28 Hayashi Gijutsu Kenkyusho:Kk Floor carpet cushioning material for automobile
JPH10329762A (en) * 1997-05-28 1998-12-15 Honda Motor Co Ltd Body structure for automobile
JPH11348699A (en) * 1998-06-12 1999-12-21 Toyota Motor Corp Impact absorbing structure of interior trim part for vehicle
JP2001026246A (en) * 1999-07-12 2001-01-30 Sekisui Plastics Co Ltd Interior material for automobile
JP2001080439A (en) * 1999-09-17 2001-03-27 Mitsubishi Motors Corp Energy absorbing member
JP2002331895A (en) * 2001-05-10 2002-11-19 Toyota Motor Corp Car body structure of automobile
JP2003127796A (en) * 2001-10-26 2003-05-08 Hitachi Chem Co Ltd Shock absorbing floor spacer for automobile

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48105214U (en) * 1972-03-13 1973-12-07
JPS61235278A (en) * 1984-11-26 1986-10-20 Ikeda Bussan Co Ltd Floor structure for vehicle, and the like
JPS62184947A (en) * 1986-02-10 1987-08-13 Eiji Adachi Laminated interior trim
JPH06183293A (en) * 1991-01-17 1994-07-05 Hayashi Gijutsu Kenkyusho:Kk Floor carpet for automobile
JPH0512268U (en) * 1991-07-31 1993-02-19 日産車体株式会社 Front floor structure in the passenger compartment
JPH0924757A (en) * 1995-07-10 1997-01-28 Hayashi Gijutsu Kenkyusho:Kk Floor carpet cushioning material for automobile
JPH10329762A (en) * 1997-05-28 1998-12-15 Honda Motor Co Ltd Body structure for automobile
JPH11348699A (en) * 1998-06-12 1999-12-21 Toyota Motor Corp Impact absorbing structure of interior trim part for vehicle
JP2001026246A (en) * 1999-07-12 2001-01-30 Sekisui Plastics Co Ltd Interior material for automobile
JP2001080439A (en) * 1999-09-17 2001-03-27 Mitsubishi Motors Corp Energy absorbing member
JP2002331895A (en) * 2001-05-10 2002-11-19 Toyota Motor Corp Car body structure of automobile
JP2003127796A (en) * 2001-10-26 2003-05-08 Hitachi Chem Co Ltd Shock absorbing floor spacer for automobile

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006088737A (en) * 2004-09-21 2006-04-06 Hayashi Telempu Co Ltd Shock absorbing structure and its manufacturing method
JP4533709B2 (en) * 2004-09-21 2010-09-01 林テレンプ株式会社 Shock absorbing structure and manufacturing method of shock absorbing structure
JP2010116152A (en) * 2009-12-18 2010-05-27 Sekisui Plastics Co Ltd Vehicular floor spacer
WO2023181566A1 (en) * 2022-03-22 2023-09-28 林テレンプ株式会社 Vehicle floor carpet

Also Published As

Publication number Publication date
JP4437662B2 (en) 2010-03-24

Similar Documents

Publication Publication Date Title
JP4302725B2 (en) Vehicle floor spacer
KR101087008B1 (en) Forming-laid interior material for automobile
JP6426707B2 (en) Automotive silencer
US20060289231A1 (en) Acoustic absorber/barrier composite
US7380858B2 (en) Sun visor for automobile and sound absorbing structure for an automobile
US20030124940A1 (en) Tunable or adjustable liner for selectively absorbing sound energy and related methods
AU2002343969B2 (en) Floor laying material, piece mat, and arranging structure thereof
KR102551613B1 (en) Method for manufacturing sound absorbing sound insulation elements, and sound absorbing sound insulation automotive trim elements
JP4359177B2 (en) Lower limb shock absorbing pad for vehicles with soundproofing
JP4437662B2 (en) Automotive floor laying body
US20070080562A1 (en) Impact absorbing body
KR101209866B1 (en) Carpet for vehicles and manufacture method thereof
JP2006160177A (en) Sound absorbing structure of automobile running on road
JP2005014718A (en) Formed laying material
JP4533709B2 (en) Shock absorbing structure and manufacturing method of shock absorbing structure
JP4147146B2 (en) Sound absorption floor
JP2007001373A (en) Shock absorber
JP3727308B2 (en) Sound-absorbing and water-insulating mat
JP2008012970A (en) Interior trim material for vehicle
JP2010120471A (en) Shock absorbing structure
JP2006273165A (en) Lower limb part impact absorbing pad for vehicle
JP2009227128A (en) Needle punch carpet
TW201716268A (en) Multilayer acoustic trim part for noise attenuation and use thereof
JP2006069256A (en) Interior material for automobile
JP2007246042A (en) Vehicular structure for absorbing shock to be applied to leg

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20061013

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20091222

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20091224

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130115

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Ref document number: 4437662

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130115

Year of fee payment: 3

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313113

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term