JP4771877B2 - Interior materials for vehicles - Google Patents

Interior materials for vehicles Download PDF

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JP4771877B2
JP4771877B2 JP2006183784A JP2006183784A JP4771877B2 JP 4771877 B2 JP4771877 B2 JP 4771877B2 JP 2006183784 A JP2006183784 A JP 2006183784A JP 2006183784 A JP2006183784 A JP 2006183784A JP 4771877 B2 JP4771877 B2 JP 4771877B2
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interior material
sound absorbing
vehicle
absorbing material
protrusion
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JP2008012970A (en
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伸治 ▲高▼倉
勇雄 鈴木
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Sekisui Kasei Co Ltd
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Description

本発明は、車両の床面の平坦性を確保しまた吸音性能を向上させる等の目的で用いられる車両用内装材に関する。   The present invention relates to a vehicle interior material used for the purpose of ensuring the flatness of a floor surface of a vehicle and improving sound absorption performance.

車両の床面の平坦性を確保するため、吸音性能を向上させるため、車内外で発生する衝撃に対して乗員を保護するため、あるいは、軽量化するため等の目的で、車両のフロアフレーム上に、あるいはそこに存在する凹所内等に、発泡樹脂成形体からなる車両用内装材を収容配置することは知られている。また、ポリスチレン系樹脂発泡体のような発泡樹脂成形体は、一般に吸音特性が乏しく、それ自体では殆ど吸音性能を有しないので、車両の居住性向上の観点から高い吸音性能が求められる場合には、発泡樹脂成形体である内装材本体に貫通孔を形成したり、内装材の底面にフェルト等の吸音材を接着剤や粘着剤により貼り付けて車両用内装材とすることも行われる（特許文献１，２参照）。   In order to ensure the flatness of the vehicle floor, to improve sound absorption performance, to protect passengers against impacts generated inside and outside the vehicle, or to reduce weight, etc. In addition, it is known that an interior material for a vehicle made of a foamed resin molded body is accommodated in a recess or the like existing there. In addition, foamed resin moldings such as polystyrene-based resin foam generally have poor sound absorption characteristics and hardly have sound absorption performance by themselves, so when high sound absorption performance is required from the viewpoint of improving the comfort of vehicles. A through-hole is formed in the interior material body that is a foamed resin molded body, or a sound absorbing material such as felt is attached to the bottom surface of the interior material with an adhesive or an adhesive (patents). References 1 and 2).

一方、合成樹脂発泡成形品が車両構造物と擦れ合うときに、両者の間で軋み音や摩擦音などの音鳴りが生じ、乗員に不快感を与えることがあるが、前記のように、発泡樹脂成形体である内装材本体の底面にフェルト等を貼り付けることにより、そのような不快な音鳴りが生じるのを防止することもできる。
特開２００５−２８０５６０号公報 特開２００１−１０５５２１号公報 On the other hand, when a synthetic resin foam molded product rubs against a vehicle structure, a squealing noise or a frictional noise may be generated between the two, which may cause discomfort to the occupant. By attaching felt or the like to the bottom surface of the interior material body that is the body, it is possible to prevent such unpleasant noise from occurring.
JP 2005-280560 A JP 2001-105521 A

車両用内装材を製造するに当たって、合成樹脂発泡成形品である内装材本体にフェルトのような吸音材を一体化させるには、接着剤やその塗布装置を必要とするため、コスト低減を妨げる要因となっている。また、接着剤で異種材料同士を一体化しているので、車両用内装材を廃棄処理する場合に、容易に分離できない場合がある。   Factors hindering cost reduction because it requires an adhesive and its applicator to integrate a sound-absorbing material such as felt into the interior material body, which is a synthetic resin foam molded product, when manufacturing interior materials for vehicles It has become. Moreover, since dissimilar materials are integrated with an adhesive, when the vehicle interior material is discarded, it may not be easily separated.

本発明は、上記のような事情に鑑みてなされたものであり、低コストで高い吸音性能と衝撃吸収性を備えかつ音鳴りが生じるのも抑制することのできる車両用内装材を提供すること、および異種材料である各構成部材の分離分別が容易な車両用内装材を得ることを目的とする。   The present invention has been made in view of the circumstances as described above, and provides an interior material for a vehicle that has high sound absorption performance and shock absorption at low cost and can suppress the occurrence of noise. An object of the present invention is to obtain an interior material for a vehicle that can easily separate and separate constituent members that are different materials.

本発明による車両用内装材は、発泡樹脂成形体である内装材本体と吸音材とが積層され、該内装材本体は室内側に配置されるとともに吸音材は車体側に配置される車両用内装材であって、該内装材本体は、配置されるときに室内側となる表面から吸音材が積層される底面までの厚さが薄く形成された領域、および該領域には内装材本体に積層される吸音材が車体に接触するように配置される底面に達するかそれよりも低い高さの突部を有し、該突部を利用して吸音材が内装材本体に取り付けられていることを特徴とする。 An interior material for a vehicle according to the present invention includes an interior material body that is a foamed resin molding and a sound absorbing material , and the interior material body is disposed on the indoor side and the sound absorbing material is disposed on the vehicle body side. a timber, said interior material body, laminating the interior material body from the indoor side becomes a surface thickness is thinly formed region to the bottom surface of the sound absorbing material is laminated, and the region when placed The sound absorbing material has a protrusion that reaches or is lower than the bottom where the sound absorbing material is placed in contact with the vehicle body, and the sound absorbing material is attached to the interior material body using the protrusion. It is characterized by.

上記の車両用内装材は内装材本体が発泡樹脂成形体であり、軽量化と所望の圧縮強度が確保できる。また、内装材本体には吸音材が配置されており、車外からの騒音が室内に浸入するのを抑制することができる。さらに、吸音材は、内装材本体の厚さが薄くされた領域に内装材本体の底面に達するかそれよりも低い高さの突部を利用して取り付けられており、取り付けが容易であることに加え、発泡樹脂成形体である内装材本体の底面は、前記突部の部分も含めて車両構造物と直接接することはないので、発泡樹脂成形体と車両構造物とが擦れ合うときに生じがちな軋み音や摩擦音などの音鳴りが生じるのを抑制できる。   The interior material for a vehicle described above has a foamed resin molded body as the interior material body, and can secure light weight and desired compression strength. In addition, a sound absorbing material is disposed in the interior material body, and noise from the outside of the vehicle can be prevented from entering the room. Furthermore, the sound absorbing material is attached to the area where the thickness of the interior material body is reduced by using the protrusions that reach the bottom surface of the interior material body or have a height lower than that. In addition, the bottom surface of the interior material body, which is a foamed resin molded body, does not come into direct contact with the vehicle structure, including the protruding portion, and therefore occurs when the foamed resin molded body and the vehicle structure rub against each other. It is possible to suppress the occurrence of noises such as itch and friction sounds.

なお、前記内装材本体に形成される表面からの厚さが薄くされた領域の形成位置および個数は任意であり、例えば中央部近傍に１個のみでもよく、４隅にそれぞれ１個ずつ計４個等の複数個であってもよい。   In addition, the formation position and the number of the thinned regions from the surface formed on the interior material main body are arbitrary, and for example, only one may be provided near the central portion, and one in each of the four corners. A plurality of such pieces may be used.

本発明による車両用内装材において、突部に対する吸音材の取り付けはステープルのように固定具を用いて行ってもよいが、作業効率の観点から、突部に対する吸音材の取り付けが両者間の摩擦抵抗によってのみなされている態様は好ましい。より具体的には、突部に相当する箇所にスリットが入った吸音材を用意し、それをスリット内に第１の突部が入り込むようにして押し込むようにする。この態様では、車両用内装材を廃棄するとき等において、発泡樹脂成形体である内装材本体とそれとは異種の材料である吸音材とを分離分別することがきわめて容易となる。   In the vehicle interior material according to the present invention, the sound absorbing material may be attached to the protrusion using a fixing tool such as a staple. From the viewpoint of work efficiency, the sound absorbing material is attached to the protrusion by friction between them. Embodiments that are made solely by resistance are preferred. More specifically, a sound-absorbing material having a slit in a portion corresponding to the protrusion is prepared, and the sound-absorbing material is pushed in such that the first protrusion enters the slit. In this aspect, when the vehicle interior material is discarded, it is very easy to separate and separate the interior material body that is the foamed resin molded body and the sound absorbing material that is a different material.

本発明による車両用内装材の一態様において、前記表面からの厚さが薄くされた領域は内装材本体の側壁部を部分的に残すようにして内装材本体のほぼ全面に渡って形成される。この態様では、内装材本体と吸音材との間に吸音室として機能する大きな空気層が形成され、かつ残された側壁部によって音の反射が起こって音が外部に漏洩するのが抑制されるので、より高い吸音性能が得られる。   In one aspect of the vehicle interior material according to the present invention, the region having a reduced thickness from the surface is formed over substantially the entire interior material body so as to partially leave the side wall portion of the interior material body. . In this aspect, a large air layer functioning as a sound absorbing chamber is formed between the interior material main body and the sound absorbing material, and sound leakage is suppressed by the remaining side wall portion and the sound is prevented from leaking to the outside. Therefore, higher sound absorption performance can be obtained.

上記態様の車両用内装材において、好ましくは、前記表面からの厚さが薄くされた領域には内装材本体の底面に達する高さの第２の突部が形成され、該第２の突部の底面は吸音材によって覆われるようにする。第２の突部の本数は１本でもよく、複数本でもよい。車両構造物に対する第２の突部全体の接地面積を、当該車両用内装材に求められる圧縮強度を考慮して適宜設定することにより、軽量化を満足しながら、衝撃吸収性能と圧縮強度の双方を満足する車両用内装材とすることができる。   In the vehicle interior material of the above aspect, preferably, a second protrusion having a height reaching the bottom surface of the interior material main body is formed in the region where the thickness from the surface is reduced, and the second protrusion The bottom surface is covered with a sound absorbing material. The number of the second protrusions may be one or plural. Both the impact absorption performance and the compressive strength are satisfied while satisfying the weight reduction by appropriately setting the contact area of the entire second protrusion with respect to the vehicle structure in consideration of the compressive strength required for the vehicle interior material. It can be set as the interior material for vehicles satisfying.

前記した第２の突部を形成した車両用内装材において、第２の突部を利用して第２の吸音材を前記表面からの厚さが薄くされた領域の全部または一部に取り付けるようにしてもよい。この形態では、実質的に吸音材は２枚の吸音材による２重構造となるので、より高い吸音効果が得られる。この態様においも、第２の突部に対する第２の吸音材の取り付けは両者間の摩擦抵抗によってのみなされていることは好ましく、この取り付け態様を採用することにより、発泡樹脂成形体である内装材本体とそれとは異種の材料である第２の吸音材とを分離分別がきわめて容易となる。   In the vehicle interior material in which the second protrusion is formed, the second sound absorbing material is attached to all or a part of the region where the thickness from the surface is reduced by using the second protrusion. It may be. In this embodiment, since the sound absorbing material substantially has a double structure of two sound absorbing materials, a higher sound absorbing effect can be obtained. Also in this aspect, it is preferable that the second sound absorbing material is attached to the second protrusion only by the frictional resistance between the two, and by adopting this attachment aspect, the interior material which is a foamed resin molded body Separation and separation of the main body and the second sound-absorbing material, which are different materials from each other, are extremely easy.

本発明による車両用内装材において、内装材本体として表面側から底面側に貫通する貫通孔を有しているものを用いることもできる。この態様では、室内側の騒音を該貫通孔を通過させかつ吸音材に吸収させることができるので、車両用内装材の室内音に対する吸音性能が向上する。   In the vehicle interior material according to the present invention, an interior material body having a through hole penetrating from the surface side to the bottom surface side can also be used. In this aspect, since the noise on the indoor side can pass through the through-hole and be absorbed by the sound absorbing material, the sound absorbing performance with respect to the room sound of the vehicle interior material is improved.

本発明において、内装材本体は任意の発泡樹脂成形体で作ることができるが、熱可塑性樹脂ビーズの発泡成形体であることは好ましい。熱可塑性樹脂には、ポリスチレン系樹脂、ポリオレフィン系樹脂（例えばポリプロピレン系樹脂、ポリエチレン系樹脂）、ポリエステル系樹脂（例えば、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレート）、ポリカーボネート系樹脂、などが挙げられる。   In the present invention, the interior material body can be made of any foamed resin molded body, but is preferably a foamed molded body of thermoplastic resin beads. Examples of the thermoplastic resin include polystyrene resins, polyolefin resins (eg, polypropylene resins, polyethylene resins), polyester resins (eg, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate), polycarbonate resins, and the like. .

なかでも、ポリオレフィン系樹脂粒子にスチレン系単量体を含浸重合して得られるスチレン改質ポリオレフィン系樹脂、特に、スチレン改質ポリエチレン系樹脂の発泡ビーズを用いることは好ましい。その理由は、スチレン改質ポリオレフィン系樹脂の成形品は、ポリプロピレン系樹脂やポリエチレン系樹脂に比べて寸法安定性と形状保持性に優れ、ポリスチレン系樹脂に比べ擦れによる粉が出にくいことによる。また、ポリエチレン系樹脂ビーズやポリプロピレン系樹脂ビーズの発泡成形品は全体の寸法収縮率が大きく、スチレン改質ポリオレフィン系樹脂ビーズの発泡成形品と比較して寸法精度が出にくく、かつ、二次発泡力も小さいことによる。スチレン改質ポリオレフィン系樹脂を用いる場合、スチレン成分の割合は４０〜９０重量％であり、好ましくは５０〜８５重量％、さらに好ましくは５５〜７５重量％である。   Among these, it is preferable to use foamed beads of a styrene-modified polyolefin resin obtained by impregnating and polymerizing a polyolefin-based resin particle with a styrene monomer, particularly a styrene-modified polyethylene resin. The reason for this is that the molded product of the styrene-modified polyolefin resin is superior in dimensional stability and shape retention compared to the polypropylene resin and polyethylene resin, and is less likely to generate dust due to rubbing than the polystyrene resin. In addition, the expansion molding of polyethylene resin beads and polypropylene resin beads has a large dimensional shrinkage ratio, and it is difficult to obtain dimensional accuracy compared to the foam molding of styrene modified polyolefin resin beads. This is because the power is small. When the styrene-modified polyolefin resin is used, the proportion of the styrene component is 40 to 90% by weight, preferably 50 to 85% by weight, and more preferably 55 to 75% by weight.

内装材本体である発泡樹脂成形体を成形に際しては、例えば上記するスチレン改質ポリエチレン系樹脂をはじめとする熱可塑性樹脂に、発泡剤を含浸させて発泡性の熱可塑性樹脂とし、該発泡性の熱可塑性樹脂を加熱水蒸気等で３〜７０倍の範囲内で予備発泡させることで予備発泡粒子を製造する。次いで、かかる予備発泡粒子を成形型のキャビティ内に充填し、蒸気加熱等によって発泡成形すればよい。発泡成形時の発泡倍率は３〜７０倍である。発泡剤にはブタン、プロパン等を用いることができる。   When molding a foamed resin molded body that is an interior material body, for example, a thermoplastic resin such as the above-mentioned styrene-modified polyethylene resin is impregnated with a foaming agent to form a foamable thermoplastic resin. Prefoamed particles are produced by prefoaming the thermoplastic resin with heated steam or the like within a range of 3 to 70 times. Then, the pre-expanded particles are filled in the mold cavity and foam-molded by steam heating or the like. The expansion ratio at the time of foam molding is 3 to 70 times. Butane, propane or the like can be used as the blowing agent.

本発明において、２つの吸音材を構成する材料に特に制限はなく、自動車の分野で一般に使用されているものを適宜用いることができる。具体的には、フェルト（例えば、綿、化学繊維等の雑反毛をＰＥＴで固めたもの）、ポリウレタン発泡体、不織布、車両用部材のリサイクル材（ウレタン、綿、化学繊維等の粉砕品）をＰＥＴ樹脂で固めたもの、解繊繊維や動植物製繊維材料、グラスウール、アスファルト発泡体、などを挙げることができる。なかでも、フェルト、ポリウレタン発泡体または不織布は好ましく、そのなかでも、高性能中綿素材からなる不織布（シンサレート（商標名））は好ましい。２つの吸音材は同じ材料であってもよく、異なった材料であってもよい。   In the present invention, the material constituting the two sound absorbing materials is not particularly limited, and materials generally used in the field of automobiles can be appropriately used. Specifically, felt (for example, cotton, chemical fibers and other miscellaneous hairs solidified with PET), polyurethane foam, non-woven fabric, recycled materials for vehicle members (pulverized products of urethane, cotton, chemical fibers, etc.) Can be enumerated with PET resin, defibrated fibers, fiber materials made of animals and plants, glass wool, asphalt foam, and the like. Of these, felt, polyurethane foam or non-woven fabric is preferable, and among them, a non-woven fabric made of a high performance batting material (Synsalate (trade name)) is preferable. The two sound absorbing materials may be the same material or different materials.

本発明による車両用内装材の全体形状は、任意であり、特に制限はない。例えば、車両への設置時に単に水平部を形成する形状のもの、あるいは水平部の先端に乗員の足が乗る傾斜部を備える形状のもの、などが挙げられる。   The overall shape of the vehicle interior material according to the present invention is arbitrary and is not particularly limited. For example, the thing of the shape which only forms a horizontal part at the time of installation to a vehicle, or the thing of the shape provided with the inclination part which a passenger | crew's foot gets on the front-end | tip of a horizontal part is mentioned.

本発明によれば、低いコストで高い吸音性能と衝撃吸収性を備えかつ音鳴りが生じるのも抑制することのできる車両用内装材が得られる。また、異種材料である各構成部材を分離分別することが容易な車両用内装材が得られる。   ADVANTAGE OF THE INVENTION According to this invention, the interior material for vehicles provided with the high sound absorption performance and impact absorptivity at low cost, and which can also suppress that a sound noise arises is obtained. Further, it is possible to obtain an interior material for a vehicle that can easily separate and separate the constituent members that are different materials.

以下、図面を参照しながら、本発明を実施の形態に基づき説明する。図１は本発明による車両用内装材の第１の形態の組み立て前の状態を示す斜視図、図２ａはその組み立て後の状態を底面側から見て示す斜視図、図２ｂはその断面図であり、図３はそれを表面側から見た斜視図である。図４は図３に示す車両用内装材を車両のフロアフレームに配置した状態を示す断面図である。図５は本発明による車両用内装材の第２の形態を表面側から見た斜視図、図６ａは本発明による車両用内装材の第３の形態を底面側から見た斜視図、図６ｂはその断面図である。図７〜図９は本発明による車両用内装材の第４の形態を組み立て工程順に示している。   Hereinafter, the present invention will be described based on embodiments with reference to the drawings. FIG. 1 is a perspective view showing a state before assembly of a first embodiment of a vehicle interior material according to the present invention, FIG. 2a is a perspective view showing the state after assembly from the bottom side, and FIG. 2b is a sectional view thereof. FIG. 3 is a perspective view of the same as seen from the surface side. FIG. 4 is a cross-sectional view showing a state in which the vehicle interior material shown in FIG. 3 is arranged on the floor frame of the vehicle. 5 is a perspective view of the second embodiment of the vehicle interior material according to the present invention as viewed from the front surface side, FIG. 6a is a perspective view of the third embodiment of the vehicle interior material according to the present invention as viewed from the bottom surface side, and FIG. Is a cross-sectional view thereof. 7 to 9 show a fourth embodiment of the vehicle interior material according to the present invention in the order of assembly steps.

図１〜図３に示す第１の形態の車両用内装材Ａ１は、発泡樹脂成形体である内装材本体１０と吸音材２０（以下、第１の吸音材という）とで構成される。内装材本体１０はスチレン改質ポリエチレン系樹脂の予備発泡粒子を型内発泡成形して得られる平板状の発泡樹脂成形体であり、車両内に配置したときに車体側となる底面１１には、表面１２からの厚さが薄くされた領域１３が４隅に形成されている。各厚さが薄くされた領域１３には、突部１４（以下、第１の突部という）が一体成形されており、各第１の突部１４の高さは内装材本体１０の底面１１に達するか、それよりも低い高さとされている。図示の例では、図２ｂの断面図に示すように、内装材本体１０の表面１２から第１の突部１４の先端までの距離をａ、内装材本体１０の表面１２から底面１１までの距離をｂとしたときに、ｂ＞ａとなるように、第１の突部１４の高さが設定されている。   The vehicle interior material A1 according to the first embodiment shown in FIGS. 1 to 3 includes an interior material body 10 and a sound absorbing material 20 (hereinafter referred to as a first sound absorbing material) which are foamed resin molded bodies. The interior material body 10 is a flat foamed resin molded body obtained by in-mold foam molding of pre-expanded particles of styrene-modified polyethylene resin, and the bottom surface 11 on the vehicle body side when placed in a vehicle has Regions 13 having a reduced thickness from the surface 12 are formed at the four corners. Projections 14 (hereinafter referred to as first projections) are integrally formed in the regions 13 where the respective thicknesses are reduced, and the height of each first projection 14 is the bottom surface 11 of the interior material body 10. The height is reached or lower than that. In the illustrated example, as shown in the cross-sectional view of FIG. 2b, the distance from the surface 12 of the interior material body 10 to the tip of the first protrusion 14 is a, the distance from the surface 12 of the interior material body 10 to the bottom surface 11 The height of the first protrusion 14 is set so that b> a, where b is a.

第１の吸音材２０は、例えば、フェルト、ポリウレタン発泡体または不織布のような材料で形成される。第１の吸音材２０の平面形状は内装材本体１０の平面形状とほぼ同じである。そして、内装材本体１０に組み付けるときに、内装材本体１０の前記第１の突部１４に相当する箇所には、スリット２１が第１の吸音材２０の厚さ方向を貫通するようにして形成されている。   The first sound absorbing material 20 is formed of a material such as felt, polyurethane foam, or nonwoven fabric, for example. The planar shape of the first sound absorbing material 20 is substantially the same as the planar shape of the interior material body 10. And when assembling to the interior material body 10, a slit 21 is formed at a location corresponding to the first protrusion 14 of the interior material body 10 so as to penetrate the thickness direction of the first sound absorbing material 20. Has been.

組み付けに当たっては、工場で成形された内装材本体１０を、図１に示すように第１の突部１４側を上にして置く。その上に第１の吸音材２０を運び、第１の突部１４とスリット２１の位置を一致させた状態として、第１の吸音材２０のスリット２１を形成した近辺を内装材本体１０に向けて上から押し下げる。それにより、図２ａ，ｂ、図３に示すように、両者は積層状態となると共に、スリット２１内に第１の突部１４が入り込み、両者間の摩擦抵抗によって内装材本体１０と第１の吸音材２０とは容易には分離しない程度の強さで一体化された本発明でいう車両用内装材Ａ１となる。   In assembly, the interior material body 10 molded at the factory is placed with the first protrusion 14 side up as shown in FIG. The first sound-absorbing material 20 is carried thereon, and the positions of the first protrusion 14 and the slit 21 are made to coincide with each other, and the vicinity where the slit 21 of the first sound-absorbing material 20 is formed faces the interior material body 10. Press down from above. As a result, as shown in FIGS. 2a, 2b and 3, both are in a laminated state, and the first protrusion 14 enters the slit 21, and the interior material body 10 and the first The vehicle interior material A1 referred to in the present invention is integrated with a strength that does not easily separate from the sound absorbing material 20.

この状態で、車両用内装材Ａ１は、製造工場から自動車の組み立て工場等に搬出される。もし、搬出時の作業等により、第１の吸音材２０が容易に内装材本体１０から分離して作業に不都合を来すような場合には、接着剤等を用いて接合をより安定化してもよいが、車両用内装材として車両に組み込んだ状態では、第１の吸音材２０と内装材本体１０との分離は起こらないので、できるだけ接着剤等を用いないことが望ましく、それにより、車両用内装材Ａ１の廃棄時等において、異種材料である第１の吸音材２０と内装材本体１０を分離分別することも容易となる。   In this state, the vehicle interior material A1 is carried out from the manufacturing factory to an automobile assembly factory or the like. If the first sound-absorbing material 20 is easily separated from the interior material body 10 due to work at the time of unloading or the like, causing inconvenience to the work, the bonding is further stabilized using an adhesive or the like. However, since the first sound-absorbing material 20 and the interior material body 10 do not separate in the state of being incorporated in a vehicle as a vehicle interior material, it is desirable to use as little adhesive as possible. When the interior material A1 is discarded, the first sound absorbing material 20 and the interior material body 10 which are different materials can be easily separated and separated.

車両用内装材Ａ１を車両のフロアフレーム１の所要箇所に取り付け、さらにカーペット２を敷き詰めた状態を図４に示す。車両用内装材Ａ１において、内装材本体１０の室内側は平板状であり、それによりカーペット２を敷き詰めたときの、車両床面の平坦性は確保される。また、内装材本体１０の車体側には第１の吸音材２０が配置されており、所望の吸音性能が確保できる。そして、本発明による車両用内装材Ａ１では、第１の吸音材２０を取り付けるための第１の突部１４の高さは、内装材本体１０の底面１１に達するかそれよりも低い高さであり、車両用内装材Ａ１を車両のフロアフレーム１に取り付けた状態ではもちろん、車両用内装材Ａ１に上載荷重がかかり第１の吸音材２０が圧縮された状態となっても、第１の突部１４の底面がフロアフレーム１に直接接触することはない。そのために、発泡樹脂成形体である内装材本体１０が車両構造物と擦れ合って生じる音鳴りの発生を抑制することができる。   FIG. 4 shows a state in which the vehicle interior material A1 is attached to a required portion of the vehicle floor frame 1 and the carpet 2 is spread. In the vehicle interior material A1, the interior side of the interior material body 10 has a flat plate shape, thereby ensuring the flatness of the vehicle floor when the carpet 2 is laid down. In addition, the first sound absorbing material 20 is disposed on the vehicle body side of the interior material main body 10, and a desired sound absorbing performance can be ensured. And in vehicle interior material A1 by this invention, the height of the 1st protrusion 14 for attaching the 1st sound absorption material 20 reaches the bottom face 11 of the interior material main body 10, or is lower than it. Yes, not only when the vehicle interior material A1 is attached to the floor frame 1 of the vehicle, but also when the first sound absorbing material 20 is compressed due to an overload applied to the vehicle interior material A1. The bottom surface of the portion 14 does not directly contact the floor frame 1. Therefore, it is possible to suppress the generation of noise caused by the interior material body 10 that is a foamed resin molded body rubbing against the vehicle structure.

なお、図１〜図３に示した例では、内装材本体１０の４隅に表面１２からの厚さが薄くされた領域１３を形成して、そこに第１の突部１４を一体成形しているが、内装材本体１０に第１の吸音材２０が仮止めできることを条件に、４隅の１箇所または２箇所のみに、前記厚さが薄くされた領域１３および第１の突部１４を一体成形するようにしてもよい。   In the example shown in FIG. 1 to FIG. 3, regions 13 having a reduced thickness from the surface 12 are formed at the four corners of the interior material body 10, and the first protrusion 14 is integrally formed there. However, on the condition that the first sound absorbing material 20 can be temporarily fixed to the interior material main body 10, the region 13 and the first protrusion 14 having the reduced thickness are formed only at one or two of the four corners. May be integrally formed.

図５に示す第２の形態の車両用内装材Ａ２は、内装材本体１０に多数の貫通孔１５が形成されている点で、図１〜図３に示した車両用内装材Ａ１と異なっている。この車両用内装材Ａ２では、室内側の騒音が貫通孔１５を通過して第１の吸音材２０に吸収されることから、室内音に対する吸音性能も向上する。   The vehicle interior material A2 of the second embodiment shown in FIG. 5 is different from the vehicle interior material A1 shown in FIGS. 1 to 3 in that a large number of through holes 15 are formed in the interior material body 10. Yes. In the vehicle interior material A2, the noise on the indoor side passes through the through hole 15 and is absorbed by the first sound absorbing material 20, so that the sound absorbing performance with respect to the room sound is also improved.

図６に示す第３の形態の車両用内装材Ａ３では、内装材本体１０の表面１２からの厚さが薄くされた領域１３が、内装材本体１０の４隅ではなく、ほぼ中央部に形成されている点で、第１および第２の形態の車両用内装材Ａ１，Ａ２と相違する。厚さが薄くされた領域１３に形成される第１の突部１４の高さ条件は、第１および第２の形態の車両用内装材Ａ１，Ａ２の場合と同様である。図示しないが、隅部と中央部あるいはその近辺の双方に厚さが薄くされた領域１３および第１の突部１４を一体成形するようにしてもよい。   In the vehicle interior material A3 of the third form shown in FIG. 6, the region 13 in which the thickness from the surface 12 of the interior material main body 10 is reduced is formed not at the four corners of the interior material main body 10 but at substantially the center. This is different from the vehicle interior materials A1 and A2 of the first and second embodiments. The height condition of the first protrusion 14 formed in the thinned region 13 is the same as in the case of the vehicle interior materials A1 and A2 of the first and second forms. Although not shown, the region 13 and the first protrusion 14 having a reduced thickness may be integrally formed at both the corner and the center or in the vicinity thereof.

図７〜図９は本発明による車両用内装材の第４の形態を示す。この車両用内装材Ａ４において、第１の吸音材２０（図８）は、第１、第２の形態の車両用内装材Ａ１，Ａ２で用いたものと同じであるが、発泡樹脂成形体である内装材本体１０の形態が大きく異なっている。すなわち、内装材本体１０には、前記した厚さが薄くされた領域１３が内装材本体１０の４つの側壁部１６を部分的に残すようにして、内装材本体１０の底面１１側のほぼ全面に渡って形成されている。そして、前記第１の突部１４は、前記厚さが薄くされた領域１３における内装材本体１０の４隅に形成されている。さらに、図示の例では、内装材本体１０における厚さが薄くされた領域１３のほぼ全面に多数の貫通孔１５が形成されると共に、１個または複数個（図示のものでは５個）の第２の突部１７が一体成形されている。第２の突部１７の高さは、内装材本体１０の底面１１に達する高さである。なお、貫通孔１５および第２の突部１７は省略することもできる。   7 to 9 show a fourth embodiment of the vehicle interior material according to the present invention. In this vehicle interior material A4, the first sound absorbing material 20 (FIG. 8) is the same as that used in the vehicle interior materials A1 and A2 of the first and second embodiments, but is a foamed resin molded body. The form of a certain interior material body 10 is greatly different. That is, the interior material main body 10 has the thinned region 13 partially leaving the four side wall portions 16 of the interior material main body 10 so that the interior material main body 10 has a substantially entire surface on the bottom surface 11 side. It is formed over. The first protrusions 14 are formed at the four corners of the interior material body 10 in the region 13 where the thickness is reduced. Further, in the illustrated example, a large number of through-holes 15 are formed in almost the entire area 13 of the interior material body 10 where the thickness is reduced, and one or a plurality (five in the illustrated example) of first through holes 15 are formed. Two protrusions 17 are integrally formed. The height of the second protrusion 17 is a height that reaches the bottom surface 11 of the interior material body 10. Note that the through-hole 15 and the second protrusion 17 can be omitted.

図７に示すように、車両用内装材Ａ４は、必須のものではないが、第２の吸音材３０を備える。第２の吸音材３０は、前記した第１の吸音材２０と同様に、例えば、フェルト、ポリウレタン発泡体または不織布のような材料で形成される。第２の吸音材３０の大きさは、内装材本体１０の４つの側壁部１６の内側における厚さが薄くされた領域１３のほぼ全域を覆うことができる大きさであり、内装材本体１０に形成した前記第２の突部１７に対応する部位には、第２の吸音材３０の厚さ方向を貫通するようにしてスリット３１が形成されている。   As shown in FIG. 7, the vehicle interior material A <b> 4 is not essential, but includes a second sound absorbing material 30. The second sound absorbing material 30 is formed of, for example, a material such as felt, polyurethane foam, or non-woven fabric, similarly to the first sound absorbing material 20 described above. The size of the second sound absorbing material 30 is a size that can cover almost the entire region 13 in which the thickness inside the four side wall portions 16 of the interior material body 10 is reduced. A slit 31 is formed at a portion corresponding to the formed second protrusion 17 so as to penetrate the thickness direction of the second sound absorbing material 30.

組み付けに当たっては、工場で成形された内装材本体１０を、図７に示すように第１の突部１４、第２の突部１７側を上にして置く。その上に第２の吸音材３０を運び、第２の突部１７とスリット３１の位置を一致させた状態として、第２の吸音材３０を内装材本体１０に向けて上から押し下げる。それにより、図８に示すように、第２の吸音材３０は厚さが薄くされた領域１３内に入り込み、第２の突部１７と第２の吸音材３０との間の摩擦抵抗によって、第２の吸音材３０は容易には分離しない程度の強さで内装材本体１０に取り付けられる。   In assembling, the interior material body 10 molded at the factory is placed with the first protrusion 14 and the second protrusion 17 side up as shown in FIG. The second sound absorbing material 30 is carried thereon, and the second projecting portion 17 and the slit 31 are made to coincide with each other, and the second sound absorbing material 30 is pushed down toward the interior material body 10 from above. Thereby, as shown in FIG. 8, the second sound absorbing material 30 enters the thinned region 13, and the frictional resistance between the second protrusion 17 and the second sound absorbing material 30 causes The second sound absorbing material 30 is attached to the interior material main body 10 with a strength that does not easily separate.

次ぎに、図８に示すように、第２の吸音材３０を取り付けた内装材本体１０の上に、前記した第１の吸音材２０を運び、以下、図１〜図３に基づき説明した第１の形態の車両用内装材Ａ１の場合と同様にして、その取り付けを行う。それにより、図９に斜視図を示すように、第４の形態による車両用内装材Ａ４が完成する。   Next, as shown in FIG. 8, the first sound absorbing material 20 is carried on the interior material main body 10 to which the second sound absorbing material 30 is attached. The attachment is performed in the same manner as in the case of the vehicle interior material A1 of the first embodiment. Thereby, as shown in a perspective view of FIG. 9, the vehicle interior material A4 according to the fourth embodiment is completed.

この車両用内装材Ａ４も、第１の吸音材１０側を車体側として車両のフロアフレームの所要箇所に取り付けられる。車両用内装材Ａ４において、他の車両用内装材Ａ１〜Ａ３と同様、内装材本体１０の室内側は平板状であり車両床面の平坦性は確保でき、かつ、内装材本体１０の車体側には第１の吸音材２０が配置されており、所望の吸音性能が確保できる。また、車両用内装材Ａ４を車両のフロアフレームに取り付けた状態では、車両用内装材Ａ４に上載荷重がかかり第１の吸音材２０が圧縮された状態となっても、第１の突部１４の底面がフロアフレームに直接接触することはなく、そのために、発泡樹脂成形体である内装材本体１０が車両構造物と擦れ合って生じる音鳴りの発生を抑制できることも、車両用内装材Ａ１〜Ａ３と同様である。   The vehicle interior material A4 is also attached to a required portion of the vehicle floor frame with the first sound absorbing material 10 side as the vehicle body side. In the vehicle interior material A4, like the other vehicle interior materials A1 to A3, the interior side of the interior material body 10 has a flat plate shape, and the flatness of the vehicle floor surface can be ensured, and the interior side of the interior material body 10 can be secured. The first sound-absorbing material 20 is arranged in the case, and a desired sound-absorbing performance can be ensured. Further, in the state where the vehicle interior material A4 is attached to the vehicle floor frame, even if the vehicle interior material A4 is subjected to an overload and the first sound absorbing material 20 is compressed, the first protrusion 14 is provided. Therefore, the interior material main body 10 that is a foamed resin molded body can be prevented from generating noise caused by rubbing against the vehicle structure. It is the same as A3.

特に、車両用内装材Ａ４では、前記厚さが薄くされた領域１３が内装材本体１０の４つの側壁部１６を部分的に残すようにして、内装材本体１０の底面１１側のほぼ全面に渡って形成されているので、内装材本体１０と底面に配置した第１の吸音材２０との間に吸音室として機能する大きな空気層が形成される。また、残された側壁部１６によって音の反射が起こって音が外部に漏洩するのが抑制される。それにより、一層高い吸音性能が得られる。   In particular, in the vehicle interior material A4, the region 13 having the reduced thickness partially leaves the four side wall portions 16 of the interior material body 10 so as to substantially cover the entire bottom surface 11 side of the interior material body 10. Since it is formed across, a large air layer that functions as a sound absorbing chamber is formed between the interior material main body 10 and the first sound absorbing material 20 disposed on the bottom surface. In addition, the reflection of sound due to the remaining side wall 16 is prevented from leaking to the outside. Thereby, higher sound absorption performance can be obtained.

さらに、図示の車両用内装材Ａ４では、第２の突部１７を有しており、車両構造物に対する第２の突部１７全体の接地面積を適宜設定することにより、軽量化を満足しながら、衝撃吸収性能と圧縮強度の双方を満足する車両用内装材とすることができる。また、前記のように第２の吸音材３０を有しており、実質的に吸音材は第１と第２の吸音材２０、３０の２重構造となるので、より高い吸音効果が得られる。貫通孔１５も形成されており、室内側の騒音は、貫通孔１５を通過して第２の吸音材３０さらには第１の吸音材２０に吸収されることから、室内音に対する吸音性能も向上する。   Furthermore, in the illustrated vehicle interior material A4, the second protrusion 17 is provided, and by appropriately setting the ground contact area of the entire second protrusion 17 with respect to the vehicle structure, the weight reduction can be satisfied. Thus, the vehicle interior material satisfying both the impact absorbing performance and the compressive strength can be obtained. Further, as described above, the second sound absorbing material 30 is provided, and the sound absorbing material substantially has a double structure of the first and second sound absorbing materials 20 and 30, so that a higher sound absorbing effect can be obtained. . The through-hole 15 is also formed, and the noise on the indoor side passes through the through-hole 15 and is absorbed by the second sound absorbing material 30 and then the first sound absorbing material 20, so that the sound absorbing performance for room sound is also improved. To do.

第２の吸音材３０は第１の吸音材２０と同様に摩擦抵抗によってのみ内装材本体１０側に取り付けられており、発泡樹脂成形体である内装材本体１０とは異種の材料である第２の吸音材３０を分離分別することも容易である。   Similarly to the first sound absorbing material 20, the second sound absorbing material 30 is attached to the interior material body 10 only by friction resistance, and is a second material that is a different material from the interior material body 10 that is a foamed resin molded body. It is also easy to separate and separate the sound absorbing material 30.

本発明による車両用内装材の第１の形態を組み立て前の状態で示す斜視図。The perspective view which shows the 1st form of the vehicle interior material by this invention in the state before an assembly. 図２ａは第１の形態の車両用内装材の組み立て後の状態を底面側から見て示す斜視図であり、図２ｂは図２ａのｂ−ｂ線での断面図である。Fig. 2a is a perspective view showing the assembled state of the vehicle interior material according to the first embodiment as seen from the bottom side, and Fig. 2b is a cross-sectional view taken along the line bb of Fig. 2a. 第１の形態の車両用内装材を表面側から見た斜視図。The perspective view which looked at the interior material for vehicles of the 1st form from the surface side. 第１の形態の車両用内装材を車両のフロアフレームに配置した状態を示す断面図。Sectional drawing which shows the state which has arrange | positioned the vehicle interior material of a 1st form to the floor frame of a vehicle. 本発明による車両用内装材の第２の形態を表面側から見た斜視図。The perspective view which looked at the 2nd form of the interior material for vehicles by the present invention from the surface side. 図６ａは本発明による車両用内装材の第３の形態を底面側から見た斜視図であり、図６ｂはその断面図である。FIG. 6A is a perspective view of a third embodiment of the vehicle interior material according to the present invention viewed from the bottom surface side, and FIG. 6B is a cross-sectional view thereof. 本発明による車両用内装材の第４の形態を組み立て工程と共に説明する図。The figure explaining the 4th form of the interior material for vehicles by the present invention with an assembly process. 第４の形態の車両用内装材を組み立て工程と共に説明する図７に続く図。The figure following FIG. 7 explaining the interior material for vehicles of a 4th form with an assembly process. 組み立て後の第４の形態の車両用内装材を底面側から見て示す斜視図。The perspective view which shows the interior material for vehicles of the 4th form after an assembly seeing from the bottom face side.

符号の説明Explanation of symbols

Ａ１〜Ａ４…車両用内装材、１…車両のフロアフレーム、２…カーペット、１０…発泡樹脂成形体である内装材本体、１１…底面、１２…表面、１３…表面からの厚さが薄くされた領域、１４…突部（第１の突部）、１５…貫通孔、１６…内装材本体の壁部、１７…第２の突部、２０…吸音材（第１の吸音材）、２１…スリット、３０…第２の吸音材、３１…スリット   A1 to A4 ... vehicle interior material, 1 ... vehicle floor frame, 2 ... carpet, 10 ... interior material body which is a foamed resin molding, 11 ... bottom surface, 12 ... surface, 13 ... thickness from the surface is reduced. 14 ... projection (first projection), 15 ... through hole, 16 ... wall portion of interior material body, 17 ... second projection, 20 ... sound absorbing material (first sound absorbing material), 21 ... Slit, 30 ... Second sound absorbing material, 31 ... Slit

Claims (6)

発泡樹脂成形体である内装材本体と吸音材とが積層され、該内装材本体は室内側に配置されるとともに吸音材は車体側に配置される車両用内装材であって、
該内装材本体は、配置されるときに室内側となる表面から吸音材が積層される底面までの厚さが薄く形成された領域、および
該領域には内装材本体に積層される吸音材が車体に接触するように配置される底面に達するかそれよりも低い高さの突部を有し、
該突部を利用して吸音材が内装材本体に取り付けられていることを特徴とする車両用内装材。 An interior material body and a sound absorbing material, which are foamed resin molded bodies, are laminated, and the interior material body is disposed on the indoor side and the sound absorbing material is disposed on the vehicle body side ,
The interior material body, sound absorbing material thickness is thinner region from the indoor side and becomes the surface to the bottom surface of the sound absorbing material is laminated, and the region to be laminated on interior material body when placed Has a protrusion that reaches or is lower than the bottom surface that is placed in contact with the vehicle body ,
An interior material for a vehicle, wherein a sound absorbing material is attached to the interior material body using the protrusion. 前記表面からの厚さが薄く形成された領域は内装材本体の側壁部を部分的に残すようにして内装材本体のほぼ全面に渡って形成されていることを特徴とする請求項１に記載の車両用内装材。 The region formed with a small thickness from the surface is formed over substantially the entire surface of the interior material body so as to partially leave a side wall portion of the interior material body. Vehicle interior materials. 表面からの厚さが薄く形成された領域には内装材本体の底面に達する高さの第２の突部が形成されており、該第２の突部の底面は吸音材によって覆われていることを特徴とする請求項２に記載の車両用内装材。 A second protrusion having a height reaching the bottom surface of the interior material body is formed in the region where the thickness from the surface is thin, and the bottom surface of the second protrusion is covered with a sound absorbing material. The vehicle interior material according to claim 2. 第２の突部を利用して第２の吸音材が取り付けられていることを特徴とする請求項３に記載の車両用内装材。   The vehicle interior material according to claim 3, wherein the second sound absorbing material is attached using the second protrusion. 内装材本体には多数の貫通孔が形成されていることを特徴とする請求項１ないし４のいずれかに記載の車両用内装材。   The interior material for vehicles according to any one of claims 1 to 4, wherein a large number of through holes are formed in the interior material body. 吸音材が、フェルト、ポリウレタン発泡体または不織布のいずれかであることを特徴とする請求項１ないし５のいずれかに記載の車両用内装材。   The vehicle interior material according to any one of claims 1 to 5, wherein the sound absorbing material is any one of felt, polyurethane foam, and nonwoven fabric.
JP2006183784A 2006-07-03 2006-07-03 Interior materials for vehicles Expired - Fee Related JP4771877B2 (en)

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