JP4906551B2

JP4906551B2 - Airbag door structure

Info

Publication number: JP4906551B2
Application number: JP2007072658A
Authority: JP
Inventors: 睦雄藤井
Original assignee: Daikyo Nishikawa Corp
Current assignee: Daikyo Nishikawa Corp
Priority date: 2007-03-20
Filing date: 2007-03-20
Publication date: 2012-03-28
Anticipated expiration: 2027-03-20
Also published as: JP2008230394A

Description

この発明は、自動車の衝突時にエアバッグ装置の作動で破断予定部が破断して開くエアバッグドア部の構造に関するものである。 The present invention relates to a structure of an airbag door portion that is opened by breaking an expected breakage portion by an operation of an airbag device in a collision of an automobile.

特許文献１には、基材と表皮との２層構造のエアバッグドア部の構造が開示されている。このエアバッグドア部では、開作動時の支点となるヒンジ部が基材の所定幅に亘る薄肉部で帯状に形成されている。この特許文献１では、ヒンジ機能を担保するために、エアバッグドア部の基材全体を靱性に優れた可撓性樹脂材である熱可塑性エラストマー材で成形している。
特開２００１−２３３１６５号公報（第４頁、図１,３） Patent Document 1 discloses a structure of an airbag door portion having a two-layer structure of a base material and a skin. In this airbag door part, the hinge part used as the fulcrum at the time of opening operation is formed in the strip | belt shape by the thin part over the predetermined width | variety of a base material. In this patent document 1, in order to ensure the hinge function, the entire base material of the airbag door portion is molded with a thermoplastic elastomer material which is a flexible resin material having excellent toughness.
JP 2001-233165 A (4th page, FIGS. 1 and 3)

しかし、エアバッグドア部には、エアバッグの大きな展開圧力が瞬間に作用することから、上記の特許文献１のように基材が可撓性樹脂材である場合には、強度及び剛性を十分に確保することができない。さりとて、基材を剛性樹脂材で形成すると、ヒンジ機能が低下することになる。また、一般に、熱可塑性エラストマー材は汎用樹脂材に比べて高価であるため、これで基材を成形すると単価が高騰する。 However, since a large deployment pressure of the airbag acts instantaneously on the airbag door portion, when the base material is a flexible resin material as in Patent Document 1, the strength and rigidity are sufficient. Can not be secured. When the base material is formed of a rigid resin material, the hinge function is lowered. In general, since a thermoplastic elastomer material is more expensive than a general-purpose resin material, the unit price increases when the base material is molded.

この発明はかかる点に鑑みてなされたものであり、その目的とするところは、エアバッグドア部の強度及び剛性確保とヒンジ機能の確保との両立を図るとともに、安価なエアバッグドア部を提供することである。 The present invention has been made in view of the above points, and an object of the present invention is to provide an inexpensive airbag door portion while ensuring the strength and rigidity of the airbag door portion and securing the hinge function. It is to be.

上記の目的を達成するため、この発明は、基材及び表皮の素材を選定するとともにヒンジ部の構造を工夫したことを特徴とする。 In order to achieve the above object, the present invention is characterized in that the base material and the skin material are selected and the structure of the hinge portion is devised.

具体的には、この発明は、剛性樹脂材からなる基材の表面側に可撓性樹脂材からなる表皮が一体に接着された内装パネルに形成され、エアバッグ装置の作動で開く自動車のエアバッグドア部の構造を対象とし、次のような解決手段を講じた。 Specifically, the present invention relates to an automobile air bag which is formed on an interior panel in which a skin made of a flexible resin material is integrally bonded to a surface side of a base material made of a rigid resin material, and is opened by the operation of an airbag device. The following solution was taken for the structure of the bag door.

すなわち、請求項１に記載の発明は、略矩形状に形成されたドア部本体と、該ドア部本体の少なくとも一辺側から該一辺に沿って一体に連続して延出するヒンジ部とからなり、上記基材には、基材破断予定部が上記ドア部本体を囲むように略矩形状に形成され、上記表皮には、上記ドア部本体のヒンジ部側の辺を除く辺に対応する第１表皮破断予定部と、上記ドア部本体のヒンジ部側の辺と直交する両側の第１表皮破断予定部からそれぞれヒンジ部側に延出する一対の第２表皮破断予定部とが形成され、上記ドア部本体は、上記基材破断予定部及び第１表皮破断予定部の内方領域の基材及び表皮で構成され、上記ヒンジ部は、上記一対の第２表皮破断予定部で挟まれて該第２表皮破断予定部の延出量に相当する幅を有するように帯状に形成された表皮で構成され、上記ヒンジ部と該ヒンジ部に対応する基材との接着力は、他の箇所における表皮と基材との接着力よりも弱く設定され、自動車の衝突時にエアバッグ装置の作動で上記基材破断予定部と第１及び第２表皮破断予定部とが破断することにより、上記ドア部本体がヒンジ部を支点に内装パネルの表側に回動するとともに、上記ヒンジ部が基材から剥離して内装パネルの表側に湾曲変形するように構成されていることを特徴とする。 That is, the invention according to claim 1 includes a door portion main body formed in a substantially rectangular shape, and a hinge portion that continuously and integrally extends along at least one side of the door portion main body along the one side. The base material is formed in a substantially rectangular shape so that the base material breakage scheduled portion surrounds the door portion main body, and the skin has a second portion corresponding to the side excluding the side on the hinge portion side of the door portion main body. And a pair of second skin rupture portions that extend from the first skin rupture portion on both sides orthogonal to the hinge portion side of the door portion main body to the hinge portion side, respectively, The door part main body is composed of a base material and a skin in an inner region of the base material planned break part and the first skin target part, and the hinge part is sandwiched between the pair of second skin target parts. It is formed in a strip shape having a width corresponding to the amount of extension of the second skin rupture planned portion. The adhesive force between the hinge part and the base material corresponding to the hinge part is set to be weaker than the adhesive force between the skin part and the base material in other locations, and the airbag device is By the operation, the base material breakage scheduled portion and the first and second skin breakage planned portions are broken, so that the door portion body rotates to the front side of the interior panel with the hinge portion as a fulcrum, and the hinge portion is based on the hinge portion. It is configured to peel from the material and bend and deform to the front side of the interior panel.

請求項２に記載の発明は、請求項１に記載の発明において、基材はポリオレフィン系樹脂材からなり、基材及び表皮の少なくとも一方の接着面には、ヒンジ部対応箇所を除いて接着性改良処理が施されていることを特徴とする。 The invention according to claim 2 is the invention according to claim 1, wherein the substrate is made of a polyolefin resin material, and at least one of the bonding surfaces of the substrate and the skin is adhesive except for a portion corresponding to the hinge portion. It is characterized by being improved.

請求項３に記載の発明は、請求項１に記載の発明において、ヒンジ部に対応する基材の表皮接着面には、片面に離型処理が施されたテープ材を離型処理面がヒンジ部側に向くようにして貼り付けていることを特徴とする。 According to a third aspect of the present invention, in the first aspect of the present invention, a tape material that has been subjected to a release treatment on one side is applied to the skin adhesion surface of the base material corresponding to the hinge portion, and the release treatment surface is a hinge. It is characterized by being attached so as to face the part side.

請求項４に記載の発明は、請求項１乃至３のいずれか１項に記載の発明において、ヒンジ部に対応する基材裏面には、エアバッグ装置の取付部が一体に形成されている。 The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the attachment portion of the airbag device is integrally formed on the back surface of the base material corresponding to the hinge portion.

請求項１に係る発明によれば、エアバッグ装置が作動していない通常時には、剛性樹脂材からなる基材でエアバッグドア部全体の強度及び剛性を確保することができる。一方、エアバッグ装置の作動時には、帯状表皮からなるヒンジ部がエアバッグの展開圧力で基材から剥離して内装パネルの表側に容易に湾曲変形するため、ヒンジ機能が十分に発揮してエアバッグドア部をスムーズに開けることができる。これにより、エアバッグドア部の強度及び剛性確保とヒンジ機能の確保との両立を図ることができる。 According to the first aspect of the present invention, the strength and rigidity of the entire airbag door portion can be ensured by the base material made of the rigid resin material at the normal time when the airbag apparatus is not operating. On the other hand, when the airbag device is in operation, the hinge portion made of a belt-like skin peels off from the base material due to the deployment pressure of the airbag and easily bends and deforms to the front side of the interior panel. The door can be opened smoothly. Thereby, coexistence with ensuring of the intensity | strength and rigidity of an airbag door part, and ensuring of a hinge function can be aimed at.

また、ヒンジ部を表皮だけで構成しているため、特許文献１の如き基材にヒンジ機能を持たせる必要がなく、よって、基材を熱可塑性エラストマー材に比べて安価な汎用樹脂材で成形することができ、製作費を低減することができる。 In addition, since the hinge portion is composed only of the skin, it is not necessary to give the base material a hinge function as in Patent Document 1, and therefore, the base material is molded from a general-purpose resin material that is less expensive than a thermoplastic elastomer material. Manufacturing costs can be reduced.

請求項２に係る発明によれば、基材及び表皮の少なくとも一方の接着面にヒンジ部対応箇所を除いて接着性改良処理を施すだけで、ヒンジ部の基材との接着力を他の箇所に比べて容易に弱く設定することができる。 According to the second aspect of the present invention, the adhesive strength of the hinge part to the base material can be increased to the other part only by applying the adhesiveness improving process to the adhesive surface of at least one of the base material and the skin except the corresponding part of the hinge part. It can be easily set weaker than

請求項３に係る発明によれば、ヒンジ部をテープ材の離型処理面に剥離に支障なき程度の若干の粘り付きを持った状態で接着することができ、しかも、ヒンジ部の基材との接着力を大幅に変動することなく安定させることができる。 According to the invention of claim 3, the hinge portion can be bonded to the release treatment surface of the tape material with a slight stickiness that does not interfere with peeling, and the hinge portion base material and It is possible to stabilize the adhesive force without greatly fluctuating.

請求項４に係る発明によれば、ヒンジ部に対応する基材をエアバッグドア部の開動作及びヒンジ部の起き上がり動作に影響されることなく定位置に固定でき、基材破断予定部や第１及び第２表皮破断予定部を速やかに破断するとともに、ヒンジ部の基材からの剥離を促進してエアバッグドア部の開作動性能を高めることができる。 According to the fourth aspect of the invention, the base material corresponding to the hinge portion can be fixed at a fixed position without being affected by the opening operation of the airbag door portion and the raising operation of the hinge portion. The first and second skin rupture scheduled portions can be quickly broken, and the peeling of the hinge portion from the base material can be promoted to improve the opening operation performance of the airbag door portion.

以下、この発明の実施形態について図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

（実施形態１）
図１及び図２は自動車の内装パネルとしてのインストルメントパネルにおけるアッパパネルの右側半分を構成するパネル構成部材１を示す。このパネル構成部材１は、左ハンドル車用のもので運転席右隣の助手席側に配置され、剛性樹脂材からなる基材３の表面側に可撓性樹脂材からなる表皮５が一体に接着された２層構造である。上記基材３を構成する剛性樹脂材としては、例えば、ポリプロピレン（ＰＰ）やガラス繊維が入ったポリプロピレン（ＧＦＰＰ）等の汎用樹脂材からなるポリオレフィン系樹脂材、アクリロニトリル・ブタジエン・スチレン（ＡＢＳ）、ポリカーボネート、ポリカＡＢＳ等であるが、ここでは、ポリオレフィン系樹脂材を使用している。上記表皮５を構成する可撓性樹脂材としては、例えば、低温特性の良いウレタン系熱可塑性エラストマー（ＴＰＵ）、オレフィン系熱可塑性エラストマー（ＴＰＯ）、スチレン系熱可塑性エラストマー（ＴＰＳ）、ポリエステル系熱可塑性エラストマー（ＴＰＥＥ）、熱硬化性ウレタン（ＰＵ）等である。一般に、これら可撓性樹脂材は上記汎用性樹脂材に比べて高価である。この実施形態１で使用する表皮５を構成する可撓性樹脂材は、ポリオレフィン系樹脂材に対して親和性の乏しいＴＰＵ、ＴＰＥＥ、ＰＵ等である。 (Embodiment 1)
FIG.1 and FIG.2 shows the panel structural member 1 which comprises the right half of the upper panel in the instrument panel as an interior panel of a motor vehicle. This panel component 1 is for a left-hand drive vehicle and is disposed on the passenger seat side adjacent to the right side of the driver's seat, and a skin 5 made of a flexible resin material is integrally formed on the surface side of a base material 3 made of a rigid resin material. Adhered two-layer structure. As the rigid resin material constituting the substrate 3, for example, a polyolefin resin material made of a general-purpose resin material such as polypropylene (PP) or polypropylene (GFPP) containing glass fiber, acrylonitrile / butadiene / styrene (ABS), Polycarbonate, polycarbonate ABS, etc. are used, but here, a polyolefin resin material is used. Examples of the flexible resin material constituting the skin 5 include urethane-based thermoplastic elastomer (TPU), olefin-based thermoplastic elastomer (TPO), styrene-based thermoplastic elastomer (TPS), and polyester-based heat having good low-temperature characteristics. Plastic elastomer (TPEE), thermosetting urethane (PU) and the like. Generally, these flexible resin materials are more expensive than the general-purpose resin materials. The flexible resin material constituting the skin 5 used in the first embodiment is TPU, TPEE, PU or the like having a poor affinity for the polyolefin resin material.

上記パネル構成部材１の助手席対応箇所には、この実施形態に係るエアバッグドア部構造が適用されたエアバッグドア部７が一体に形成されている。該エアバッグドア部７は、略矩形状に形成されたドア部本体９と、該ドア部本体９の車体前方側の一辺側に該一辺に沿って一体に連続して延出するヒンジ部１１（図１の網目領域）とからなる片開きタイプである。 An airbag door portion 7 to which the airbag door portion structure according to this embodiment is applied is integrally formed at a position corresponding to the passenger seat of the panel component 1. The airbag door portion 7 includes a door portion main body 9 formed in a substantially rectangular shape, and a hinge portion 11 that continuously and integrally extends along one side of the door portion main body 9 on one side of the vehicle body front side. (A mesh area in FIG. 1).

上記基材３には、基材破断予定部１３が上記ドア部本体９を囲むように略矩形状に形成されている。一方、上記表皮５には、上記ドア部本体９のヒンジ部１１側の辺を除く三辺（車体後方側の一辺、車体側方側の二辺）に対応するドア部本体９側の略コ字状の第１表皮破断予定部１５ａと、上記ドア部本体９のヒンジ部１１側の辺と直交する両側の第１表皮破断予定部１５ａからそれぞれヒンジ部１１側（車体前方側）に延出する一対の第２表皮破断予定部１５ｂとが形成され、上記ドア部本体９は上記基材破断予定部１３及び第１表皮破断予定部１５ａの内方領域の基材３及び表皮５で構成されている。上記ヒンジ部１１は、上記一対の第２表皮破断予定部１５ｂで挟まれて該第２表皮破断予定部１５ｂの延出量に相当する幅を有するように帯状に形成された表皮５で構成されている。 In the base material 3, a base material breakage scheduled portion 13 is formed in a substantially rectangular shape so as to surround the door portion main body 9. On the other hand, the outer skin 5 is provided with a substantially coin on the side of the door body 9 corresponding to three sides (one side on the rear side of the vehicle body and two sides on the side of the vehicle body) excluding the side on the hinge portion 11 side of the door portion body 9. Extending from the first skin-scheduled part 15a in the shape of a letter and the first skin-skinned part 15a on both sides orthogonal to the hinge part 11 side of the door body 9 to the hinge part 11 side (vehicle body front side). A pair of second skin rupture scheduled portions 15b are formed, and the door body 9 is composed of the base material 3 and the skin 5 in the inner region of the base material rupture scheduled portion 13 and the first skin rupture scheduled portion 15a. ing. The hinge portion 11 is composed of a skin 5 formed in a band shape so as to have a width corresponding to the extension amount of the second skin rupture scheduled portion 15b sandwiched between the pair of second skin rupture scheduled portions 15b. ing.

上記基材破断予定部１３、第１表皮破断予定部１５ａ及び第２表皮破断予定部１５ｂは、図４（ａ）及び図５（ａ）に拡大して示すように、基材３及び表皮５の裏面に表面に達しないように型成形により形成された破断溝部３ａ，５ａに対応して薄肉に形成され、エアバッグドア部７がパネル構成部材１の表面から識別できない，いわゆるシームレスタイプの平面視略矩形状のエアバッグドア部７がパネル構成部材１に一体に形成されている。なお、上記基材３の破断溝部３ａは断面略Ｖ字形状に、上記表皮５の破断溝部５ａは断面略台形状にそれぞれ形成されているが、これに限らない。また、エアバッグドア部７は、基材破断予定部１３、第１表皮破断予定部１５ａ及び第２表皮破断予定部１５ｂがパネル構成部材１の表面から識別できるタイプであってもよい。 As shown in FIGS. 4 (a) and 5 (a) in an enlarged manner, the base material scheduled break portion 13, the first skin break planned portion 15a, and the second skin break planned portion 15b are shown in FIG. A so-called seamless type plane in which the airbag door portion 7 cannot be distinguished from the surface of the panel component 1 and is formed thin so as to correspond to the fractured groove portions 3a and 5a formed by molding so as not to reach the surface on the back surface A substantially rectangular airbag door portion 7 is formed integrally with the panel constituent member 1. In addition, although the fracture | rupture groove part 3a of the said base material 3 is formed in the cross-sectional substantially V shape, and the fracture | rupture groove part 5a of the said skin 5 is each formed in the cross-sectional substantially trapezoid shape, it is not restricted to this. Further, the airbag door portion 7 may be of a type in which the base material planned break portion 13, the first skin break planned portion 15 a and the second skin break planned portion 15 b can be identified from the surface of the panel constituent member 1.

上記基材破断予定部１３と第１表皮破断予定部１５ａとは、平面視で完全に重合しているのではなく、第１表皮破断予定部１５ａが基材破断予定部１３よりも若干外側に位置ずれしている。このような位置関係は、上記破断溝部３ａ，５ａの大きさ及び形成位置によるものであり、基材３の破断溝部３ａの線状底部３ｂが表皮５の破断溝部５ａの一側壁５ｂに接近している。このようなエアバッグドア部７（パネル構成部材１）を成形するには、予め射出成形しておいた基材３を成形型にセットしてキャビティ内に溶融樹脂を射出して表皮５を基材３に一体に成形すればよい。これによると、図４（ｂ）及び図５（ｂ）に拡大して示すように、基材３の破断溝部３ａの線状底部３ｂに対応する基材破断予定部１３が後述するエアバッグ装置２１のエアバッグの展開圧力で破断すると、この破断力が表皮５の破断溝部５ａの一側壁５ｂに波及し、当該一側壁５ｂが剥離しながら表皮５の第１及び第２表皮破断予定部１５ａ，１５ｂが破断することになる。 The base material break planned portion 13 and the first skin break planned portion 15a are not completely polymerized in a plan view, but the first skin break planned portion 15a is slightly outside the base material planned break portion 13. Misaligned. Such a positional relationship depends on the size and formation position of the breaking groove portions 3a and 5a, and the linear bottom portion 3b of the breaking groove portion 3a of the base material 3 approaches one side wall 5b of the breaking groove portion 5a of the skin 5. ing. In order to mold such an air bag door portion 7 (panel constituent member 1), the base material 3 that has been injection molded in advance is set in a molding die, molten resin is injected into the cavity, and the skin 5 is formed. What is necessary is just to shape | mold to the material 3 integrally. According to this, as shown in an enlarged view in FIGS. 4B and 5B, an airbag device in which a base material breakage planned portion 13 corresponding to the linear bottom portion 3b of the break groove portion 3a of the base material 3 is described later. When the airbag 21 is broken by the deployment pressure of the airbag 21, the breaking force is applied to the one side wall 5b of the breaking groove 5a of the skin 5, and the first and second skin breaking scheduled portions 15a of the skin 5 are peeled off while the one side wall 5b is peeled off. 15b will break.

上記ドア部本体９の車体前方側（ヒンジ部１１）、車体後方側及び車体側方側に対応する基材３裏面には、図３にも示すように、ネジ穴１７ａを有する複数個のボス状取付部１７が複数個の補強リブ部１９で補強された状態で間隔をあけて一体に突設されている。 As shown in FIG. 3, a plurality of bosses having screw holes 17a are formed on the back surface of the base material 3 corresponding to the vehicle body front side (hinge portion 11), the vehicle body rear side, and the vehicle body side side of the door body 9. The shape mounting portion 17 is integrally projected at intervals with the plurality of reinforcing rib portions 19 being reinforced.

上記エアバッグドア部７裏面には、折り畳まれたエアバッグ（図示せず）やインフレータ（図示せず）等を収容してなるエアバッグ装置２１が配置され、該エアバッグ装置２１の底面には第１ブラケット２３が溶接されている。一方、車幅方向に延びてインストルメントパネルを支持するインパネレインフォースメント２５には第２ブラケット２７の一端が溶接され、該第２ブラケット２７の他端は、上記第１ブラケット２３にボルト２９とナット３１とで締結されている。これにより、上記エアバッグ装置２１がエアバッグドア部７に対応するようにインパネレインフォースメント２５に第１及び第２ブラケット２３，２７を介して連結支持されている。 On the back surface of the airbag door portion 7 is disposed an airbag device 21 that accommodates a folded airbag (not shown), an inflator (not shown), and the like. The first bracket 23 is welded. On the other hand, one end of the second bracket 27 is welded to the instrument panel reinforcement 25 that extends in the vehicle width direction and supports the instrument panel, and the other end of the second bracket 27 is connected to the first bracket 23 with a bolt 29. Fastened with a nut 31. Thus, the airbag device 21 is connected and supported by the instrument panel reinforcement 25 via the first and second brackets 23 and 27 so as to correspond to the airbag door portion 7.

上記エアバッグ装置２１の略上半部分には、平面視略矩形状の金属製枠体３３が外嵌合されて固定されている。該枠体３３は、車幅方向に延びる前壁部３５及び後壁部３７と、これら前壁部３５及び後壁部３７の両端同士を連結する車体前後方向に延びる両側壁部３９とで構成されている。上記枠体３３の前壁部３５、後壁部３７及び両側壁部３９の上端は、上記ドア部本体９の四辺に接近するか、又はその周縁に当接しており、パネル構成部材１の表側より作用する押圧力に対して上記基材破断予定部１３、第１表皮破断予定部１５ａ及び第２表皮破断予定部１５ｂを構成する破断溝部３ａ，５ａ周縁を支持し、該破断溝部３ａ，５ａが不用意に破断しないようにしている。また、上記前壁部３５、後壁部３７及び両側壁部３９の上端には、ネジ挿通孔（図示せず）を有する取付片部４１が上記各取付部１７に対応するようにそれぞれ下方に折曲形成され、これら取付片部４１は、上記各取付部１７下端にあてがわれてネジ４３をネジ挿通孔を経て各取付部１７のネジ穴１７ａにねじ込むことにより締結されている。これにより、上記エアバッグ装置２１がエアバッグドア部７に対応するように枠体３３を介して複数個の取付部１７に取り付けられている。 A metal frame 33 having a substantially rectangular shape in plan view is fitted and fixed to a substantially upper half portion of the airbag device 21. The frame 33 includes a front wall portion 35 and a rear wall portion 37 that extend in the vehicle width direction, and both side wall portions 39 that extend in the vehicle body front-rear direction connecting both ends of the front wall portion 35 and the rear wall portion 37. Has been. The upper ends of the front wall portion 35, the rear wall portion 37, and both side wall portions 39 of the frame body 33 are close to the four sides of the door portion main body 9 or are in contact with the peripheral edges thereof, and the front side of the panel component 1 Supporting the peripheral edges of the fracture groove portions 3a, 5a constituting the base material planned fracture portion 13, the first skin fracture planned portion 15a and the second skin fracture planned portion 15b with respect to the pressing force acting more, the fracture groove portions 3a, 5a Is to prevent inadvertent breakage. In addition, attachment pieces 41 having screw insertion holes (not shown) are provided below upper ends of the front wall portion 35, the rear wall portion 37, and the side wall portions 39 so as to correspond to the attachment portions 17, respectively. The attachment pieces 41 are bent and fastened by being screwed into the screw holes 17a of the attachment portions 17 through the screw insertion holes, applied to the lower ends of the attachment portions 17 described above. Thus, the airbag device 21 is attached to the plurality of attachment portions 17 via the frame body 33 so as to correspond to the airbag door portion 7.

この発明の特徴として、上記ヒンジ部１１と該ヒンジ部１１に対応する基材３との接着力は、他の箇所における表皮５と基材３との接着力よりも弱く設定されている。その手法は、ヒンジ部１１を除く基材３表面である表皮５との接着面に、例えばガスの炎であぶるフレーム処理、プラズマ処理、コロナ放電処理、イトロ処理等の接着性改良処理を施す手法である。これら接着性改良処理は、例えばＰＰ等のポリオレフィン材は表面の濡れが悪く、相手材との接着性が劣ることから、表面性状を改質する観点から一般に良く採用されている手法であり、この手法を特定箇所に施さないか、もくしは完全に施さないようにして部分的に接着力を弱くするようにする。これにより、基材３のフレーム処理等が施された箇所では表皮５が基材３に強固に接着されるが、基材３のフレーム処理等が施されていないヒンジ部１１対応箇所では表皮５の基材３に対する接着力が接着性改良処理箇所に比べて弱くなっている。図３〜５において、接着性改良処理箇所にハッチングと符号Ｓを付して表す。 As a feature of the present invention, the adhesive force between the hinge portion 11 and the base material 3 corresponding to the hinge portion 11 is set to be weaker than the adhesive force between the skin 5 and the base material 3 at other locations. The technique is a technique in which an adhesion improving process such as a flame process, a plasma process, a corona discharge process, an itro process or the like is performed on the surface of the base material 3 excluding the hinge portion 11 which is the surface of the base material 3. It is. These adhesion improvement treatments are generally adopted from the viewpoint of modifying the surface properties because, for example, polyolefin materials such as PP have poor surface wettability and poor adhesion to the counterpart material. Do not apply the method to a specific place, or do not apply the comb completely, so that the adhesive strength is partially weakened. As a result, the skin 5 is firmly bonded to the base 3 at the place where the base 3 is subjected to the frame treatment or the like, but at the place corresponding to the hinge portion 11 where the base 3 is not subjected to the frame or the like, the skin 5 is attached. The adhesive force to the base material 3 is weaker than that of the adhesion improving treatment portion. 3 to 5, hatching and symbol S are given to the adhesion improvement processing portions.

上記フレーム処理等の接着性改良処理を施さない箇所の領域、つまりヒンジ部１１の幅は、エアバッグドア部７が開作動した際にヒンジ部１１が基材３から剥離してパネル構成部材１の表側に湾曲変形した曲面の長さＬであり、表皮５の厚さをｔ、エアバッグドア部７の開角度をθとすると、Ｌ＝（θ／３６０）×２πｔで表せる。例えば、ｔ＝３ｍｍ、θ＝９０°と仮定すると、Ｌ≒４．７ｍｍであり、ヒンジ部１１の幅は少なくともこれくらいに設定すればよい。なお、θ＝９０°と仮定したのは、θ＞９０°は慣性力でエアバッグドア部７が開くからである。 The region where the adhesiveness improvement processing such as the frame processing is not performed, that is, the width of the hinge portion 11 is the same as the width of the hinge portion 11 when the airbag door portion 7 is opened. Is the length L of the curved surface that is curved and deformed to the front side, where t is the thickness of the skin 5 and θ is the opening angle of the airbag door portion 7, L = (θ / 360) × 2πt. For example, assuming that t = 3 mm and θ = 90 °, L≈4.7 mm, and the width of the hinge portion 11 may be set to at least about this. Note that θ = 90 ° is assumed because the airbag door portion 7 is opened by inertia force when θ> 90 °.

上述の如く構成されたエアバッグドア部７を備えたパネル構成部材１では、自動車が衝突すると、エアバッグ装置２１のエアバッグがインフレータの作動によって膨張して枠体３３に案内されながら展開し、その展開圧力でエアバッグドア部７（ドア部本体９）が上方に押圧されて基材破断予定部１３と第１及び第２表皮破断予定部１５ａ,１５ｂとが破断することにより、上記ドア部本体９がヒンジ部１１を支点にパネル構成部材１の表側に回動するとともに、上記ヒンジ部１１が基材３から剥離してパネル構成部材１の表側に湾曲変形し、エアバッグドア部７が車体前方上向きに開く。これにより、展開したエアバッグで助手席の乗員を車体前後方向の衝撃から保護するようになっている。 In the panel constituent member 1 including the airbag door portion 7 configured as described above, when the automobile collides, the airbag of the airbag device 21 is inflated by the operation of the inflator and deployed while being guided by the frame body 33, The airbag door portion 7 (door portion main body 9) is pressed upward by the deployment pressure, and the base material breakage scheduled portion 13 and the first and second skin breakage planned portions 15a and 15b are broken, thereby the door portion. The main body 9 pivots to the front side of the panel constituent member 1 with the hinge portion 11 as a fulcrum, and the hinge portion 11 peels off from the base material 3 and is bent and deformed to the front side of the panel constituent member 1. Open the vehicle forward and upward. Thereby, the passenger in the passenger seat is protected from the impact in the longitudinal direction of the vehicle body by the deployed airbag.

このように、この実施形態１では、エアバッグ装置２１が作動していない通常時には、エアバッグドア部７全体の強度及び剛性確保を剛性樹脂材からなる基材３で図ることができる。一方、エアバッグ装置２１の作動時には、帯状表皮からなるヒンジ部１１がエアバッグの展開圧力で基材３から剥離することで容易に湾曲変形させてそのヒンジ機能を十分に発揮させ、エアバッグドア部７のスムーズな開作動を行うことができる。これにより、エアバッグドア部７の強度及び剛性確保とヒンジ機能の確保とを共に図ることができる。 As described above, in the first embodiment, when the airbag device 21 is not operating normally, the strength and rigidity of the entire airbag door portion 7 can be ensured by the base material 3 made of the rigid resin material. On the other hand, when the airbag device 21 is operated, the hinge portion 11 made of a belt-like skin is easily bent and deformed by peeling from the base material 3 by the deployment pressure of the airbag, and the hinge function is sufficiently exerted. Smooth opening operation of the part 7 can be performed. Thereby, the strength and rigidity of the airbag door portion 7 and the hinge function can be ensured together.

また、この実施形態１では、エアバッグドア部７の主体をなす基材３を高価な熱可塑性エラストマー材を用いることなく安価な汎用樹脂材であるポリオレフィン系樹脂材で成形する一方、エアバッグドア部７に占める割合が基材３に比べて極めて少ない表皮５を汎用樹脂材（ポリオレフィン系樹脂材）よりも高価な熱可塑性エラストマー材等で成形しているので、全体としてエアバッグドア部７はそれほどコストアップを招来せず、廉価なものにすることができる。また、ヒンジ機能を担う表皮５は靱性を有しかつ低温特性の良い熱可塑性エラストマー材等で成形されているため、冬季や寒冷地帯等のように気温が非常に低い環境の下であっても劣化せず、破断することなくヒンジ機能を十分に発揮させかつエアバッグドア部７の飛散を防止することができる。 In the first embodiment, the base material 3 that forms the main body of the airbag door portion 7 is molded from a polyolefin resin material that is an inexpensive general-purpose resin material without using an expensive thermoplastic elastomer material. Since the skin 5 occupying an extremely small proportion in the portion 7 is formed of a thermoplastic elastomer material or the like that is more expensive than a general-purpose resin material (polyolefin resin material), the airbag door portion 7 as a whole It does not cause much cost increase and can be made inexpensive. In addition, since the skin 5 responsible for the hinge function is formed of a thermoplastic elastomer material having toughness and good low-temperature characteristics, it can be used even in an environment where the temperature is very low, such as in winter or cold regions. Without being deteriorated, the hinge function can be sufficiently exerted without breaking, and scattering of the airbag door portion 7 can be prevented.

さらに、この実施形態１では、ヒンジ部１１対応箇所を除く基材３の接着面にフレーム処理等の接着性改良処理を施す際、基材３のヒンジ部１１対応箇所をマスキングするだけでよいので、ヒンジ部１１の基材３との接着力を他の箇所に比べて容易に弱く設定することができる。 Furthermore, in this Embodiment 1, when performing adhesiveness improvement processing, such as a frame process, on the adhesion surface of the base material 3 excluding the location corresponding to the hinge portion 11, it is only necessary to mask the location corresponding to the hinge portion 11 of the base material 3. In addition, the adhesive force of the hinge part 11 to the base material 3 can be easily set to be weak compared to other parts.

加えて、この実施形態１では、ヒンジ部１１に対応する基材３をエアバッグ装置２１の取付部１７、枠体３３及びエアバッグ装置２１を介してインパネレインフォースメント２５に支持しているので、ヒンジ部１１に対応する基材３をエアバッグドア部７の開動作及びヒンジ部１１の起き上がり動作に影響されることなく定位置に固定でき、基材破断予定部１３や第１及び第２表皮破断予定部１５ａ,１５ｂを速やかに破断するとともに、ヒンジ部１１の基材３からの剥離を促進してエアバッグドア部７の開作動性能を高めることができる。 In addition, in the first embodiment, the base material 3 corresponding to the hinge portion 11 is supported by the instrument panel reinforcement 25 via the attachment portion 17 of the airbag device 21, the frame 33, and the airbag device 21. The base material 3 corresponding to the hinge portion 11 can be fixed at a fixed position without being affected by the opening operation of the airbag door portion 7 and the raising operation of the hinge portion 11, and the base material breakage scheduled portion 13 and the first and second base portions 3 The skin breaking scheduled portions 15a and 15b can be quickly broken, and the peeling of the hinge portion 11 from the base material 3 can be promoted to improve the opening operation performance of the airbag door portion 7.

（実施形態２）
図６は実施形態２の図３相当図を示す。この実施形態２では、接着性改良処理が実施形態１と異なるほかは実施形態１と同様に構成されているので、ここでは異なる構成のみを説明し、図３と同一構成箇所には同一の符号を付すとともに、パネル構成部材１の全体構成は図１及び図２を代用することとして説明を省略する。 (Embodiment 2)
FIG. 6 shows a diagram corresponding to FIG. In the second embodiment, except that the adhesion improving process is different from that of the first embodiment, the configuration is the same as that of the first embodiment. Therefore, only the different configuration will be described here, and the same components as those in FIG. In addition, the entire configuration of the panel constituent member 1 will be described with reference to FIGS.

この実施形態２では、２段構えの接着性改良処理を施している。つまり、実施形態１と同様のフレーム処理等による接着性改良処理を基材３表面の全体に施し、さらに、別の接着性改良処理として、片面に離型処理が施されたテープ材４５を離型処理面がヒンジ部１１側に向くようにして該ヒンジ部１１に対応する基材３の表皮接着面に貼り付けている。 In the second embodiment, a two-stage adhesion improving process is performed. That is, an adhesive improvement process such as a frame process similar to that of the first embodiment is applied to the entire surface of the base material 3, and as another adhesive improvement process, the tape material 45 that has been subjected to a release process on one side is separated. The mold processing surface is attached to the skin adhesion surface of the base material 3 corresponding to the hinge portion 11 so that the mold processing surface faces the hinge portion 11 side.

したがって、この実施形態２では、ヒンジ部１１をテープ材４５の離型処理面に剥離に支障なき程度の若干の粘り付きを持った状態で接着することができ、しかも、テープ材４５の離型処理を変えることでヒンジ部１１の基材３との接着力を通常使用時の接着は保ちつつ、エアバッグドア部７の開作動時には剥離するよう容易に調整できる。また、この実施形態２では、基材３表面の全体にフレーム処理等の接着性改良処理を施した後、テープ材４５をヒンジ部１１に対応する基材３に貼り付けるだけでよく、実施形態１の如き接着性改良処理に際してのマスキングが不要で、作業性を向上させることができる。そのほかは実施形態１と同様の効果を奏することができる。 Therefore, in the second embodiment, the hinge portion 11 can be adhered to the release treatment surface of the tape material 45 with a slight stickiness that does not hinder the peeling, and the release of the tape material 45 is also possible. By changing the process, the adhesive force of the hinge portion 11 to the base material 3 can be easily adjusted so as to be peeled off when the airbag door portion 7 is opened while maintaining the adhesion during normal use. In the second embodiment, the entire surface of the base material 3 is subjected to an adhesive improvement process such as a frame process, and then the tape material 45 is simply attached to the base material 3 corresponding to the hinge portion 11. Masking at the time of the adhesive improvement treatment as in No. 1 is unnecessary, and workability can be improved. Other than that, the same effects as in the first embodiment can be obtained.

（実施形態３）
図７は実施形態３の図３相当図を示す。この実施形態３では、実施形態１と同様にフレーム処理等による接着性改良処理をヒンジ部１１を除く基材３に施している。また、ヒンジ部１１の厚さを他の箇所の表皮５の厚さの略２倍に設定しているとともに、ヒンジ部１１基端にリベット状の球頭状の突起部４７を一体に突設して該突起部４７を基材３の嵌合孔４９に嵌合させてしている。そのほかは実施形態１と同様に構成されているので、図３と同一構成箇所には同一の符号を付すとともに、パネル構成部材１の全体構成は図１及び図２を代用することとして説明を省略する。 (Embodiment 3)
FIG. 7 is a diagram corresponding to FIG. In the third embodiment, similarly to the first embodiment, the base material 3 excluding the hinge portion 11 is subjected to an adhesion improving process by a frame process or the like. In addition, the thickness of the hinge portion 11 is set to be approximately twice the thickness of the skin 5 at other locations, and a rivet-like projection 47 having a rivet shape is integrally provided at the base end of the hinge portion 11. Thus, the projection 47 is fitted in the fitting hole 49 of the base material 3. Since the rest of the configuration is the same as that of the first embodiment, the same components as those in FIG. 3 are denoted by the same reference numerals, and the overall configuration of the panel component member 1 is omitted as an alternative to FIGS. 1 and 2. To do.

したがって、実施形態１と同様の効果を奏することができることに加えて、厚肉のヒンジ部１１により該ヒンジ部１１がエアバッグドア部７開作動時の衝撃で引き千切れ難くすることができるとともに、ヒンジ部１１基端の突起部４７を基材３の嵌合孔４９に嵌合させることでそれ以上ヒンジ部１１が捲れないようにすることができる。 Therefore, in addition to having the same effect as in the first embodiment, the thick-walled hinge portion 11 can make the hinge portion 11 difficult to tear off due to an impact when the airbag door portion 7 is opened. By fitting the projection 47 at the base end of the hinge part 11 into the fitting hole 49 of the base material 3, the hinge part 11 can be prevented from further bending.

（実施形態４）
図８は実施形態４の図２相当図を示す。この実施形態４では、実施形態１と同様にフレーム処理等による接着性改良処理をヒンジ部１１を除く基材３に施している。しかし、実施形態１では枠体３３がパネル構成部材１と別体であったが、実施形態４ではパネル構成部材１と一体にしている。 (Embodiment 4)
FIG. 8 shows a diagram corresponding to FIG. In the fourth embodiment, as in the first embodiment, the base material 3 excluding the hinge portion 11 is subjected to an adhesion improving process such as a frame process. However, the frame 33 is separate from the panel component 1 in the first embodiment, but is integrated with the panel component 1 in the fourth embodiment.

つまり、前壁部５１、後壁部５３及び両側壁部５５からなる枠体部５７を基材３裏面に一体に突設し、エアバッグ装置２１の車体前面及び車体後面にそれぞれ固着した複数個（図８では１個のみ現れる）のフック５９を上記前壁部５１及び後壁部５３にそれぞれ形成した複数個（図８では１個のみ現れる）の係合孔５１ａ,５３ａに係合させている。そして、エアバッグの展開圧力がエアバッグドア部７に作用した際、エアバッグドア部７の車体前方端縁側のパネル構成部材１が押出方向に撓むことで上記各フック５９が各係合孔５１ａ,５３ａ下縁に押し付けられ、パネル構成部材１が押出方向に動くのを規制している。 That is, a plurality of frame portions 57 each including a front wall portion 51, a rear wall portion 53, and both side wall portions 55 are integrally projected on the back surface of the base material 3, and are respectively fixed to the front surface and the rear surface of the vehicle body of the airbag device 21. A hook 59 (only one appears in FIG. 8) is engaged with a plurality (only one appears in FIG. 8) of engagement holes 51a and 53a formed in the front wall portion 51 and the rear wall portion 53, respectively. Yes. When the deployment pressure of the airbag acts on the airbag door portion 7, the panel constituent member 1 on the vehicle body front edge side of the airbag door portion 7 bends in the pushing direction, so that each hook 59 is engaged with each engagement hole. 51a and 53a are pressed against the lower edges to restrict the panel component 1 from moving in the extrusion direction.

さらに、実施形態１のボス状の取付部１７の代わりに三角形の板状リブからなる取付部６１を上記枠体部５７の前壁部５１及び後壁部５３上端と基材３裏面とに跨るように一体に形成し、そのうち、前壁部５１側の取付部６１がヒンジ部１１に対応している。 Further, instead of the boss-shaped mounting portion 17 of the first embodiment, the mounting portion 61 formed of a triangular plate-shaped rib straddles the upper ends of the front wall portion 51 and the rear wall portion 53 of the frame body portion 57 and the back surface of the base material 3. The mounting portion 61 on the front wall portion 51 side corresponds to the hinge portion 11.

そのほかは実施形態１と同様に構成されているので、図３と同一構成箇所には同一の符号を付すとともに、パネル構成部材１の全体構成は図１及び図２を代用することとして説明を省略する。 Since the rest of the configuration is the same as that of the first embodiment, the same components as those in FIG. 3 are denoted by the same reference numerals, and the overall configuration of the panel component member 1 is omitted as an alternative to FIGS. 1 and 2. To do.

したがって、実施形態１と同様の効果を奏することができることに加えて、枠体部５７が基材３と一体である分、構造がシンプルになる。 Therefore, in addition to being able to achieve the same effects as those of the first embodiment, the structure is simplified because the frame body portion 57 is integrated with the base material 3.

なお、上記の各実施形態では、ヒンジ部１１形成領域を除く基材３の接着面に接着性改良処理を施したが、表皮５側にのみ施してもよく、さらには基材３及び表皮５の両方に施してもよい。 In each of the above embodiments, the adhesion improving process is performed on the bonding surface of the base material 3 excluding the region where the hinge portion 11 is formed. However, it may be applied only to the skin 5 side, and further, the base material 3 and the skin 5 may be applied. May be applied to both.

また、上記の実施形態２では、フレーム処理等による接着性改良処理に加えて、テープ材４５のヒンジ部１１形成箇所への貼付けを行ったが、基材３と表皮５とが親和性のある樹脂材である場合には、フレーム処理等による接着性改良処理をせずに、テープ材４５のヒンジ部１１形成箇所への貼付けだけを行ってもよい。 Moreover, in Embodiment 2 described above, in addition to the adhesion improving process by the frame process or the like, the tape material 45 is attached to the hinge part 11 forming portion, but the base material 3 and the skin 5 have affinity. In the case of a resin material, the tape material 45 may be attached only to the position where the hinge portion 11 is formed without performing an adhesion improvement process such as a frame process.

さらに、上記の各実施形態では、基材３を成形した後、該基材３を成形型にセットして溶融樹脂をキャビティ内に充填することで表皮５を基材３に接着するようにしたが、基材３及び表皮５をそれぞれ別々に成形した後、真空接着やプレス接着により両者を接着するようにしてもよい。この場合、基材３のヒンジ部１１対応箇所をマスキングした状態で、基材３及び表皮５の少なくとも一方に接着剤を塗布する。接着剤としては、ゴム系、オレフィン系、ウレタン系、アクリル系等の接着剤を基材３及び表皮５の材質に応じて適宜選択すればよい。そして、両者を接着した後にレーザーや熱刃等で後加工により切り込みを入れて基材破断予定部１３、第１表皮破断予定部１５ａ及び第２表皮破断予定部１５ｂを形成する。 Furthermore, in each of the above-described embodiments, after the base material 3 is molded, the base material 3 is set in a molding die and the molten resin is filled in the cavity to adhere the skin 5 to the base material 3. However, after forming the base material 3 and the skin 5 separately, they may be bonded together by vacuum bonding or press bonding. In this case, an adhesive is applied to at least one of the base material 3 and the skin 5 in a state where the portion corresponding to the hinge portion 11 of the base material 3 is masked. As the adhesive, a rubber-based, olefin-based, urethane-based, acrylic-based adhesive or the like may be appropriately selected according to the material of the base material 3 and the skin 5. And after bonding both, it cuts by post-processing with a laser, a hot blade, etc., and forms the base material fracture plan part 13, the 1st skin fracture plan part 15a, and the 2nd skin fracture plan part 15b.

さらにまた、上記の各実施形態では、基材破断予定部１３及び第１及び第２表皮破断予定部１５ａ,１５ｂを型成形により破断溝部３ａ，５ａを形成することで薄肉化して破断し易くしたが、レーザーや熱刃等で後加工により破断し易くしてもよい。なお、基材破断予定部１３、第１表皮破断予定部１５ａ及び第２表皮破断予定部１５ｂをレーザーや熱刃等を用い後加工で形成する場合、基材３の裏側から表皮５の表面に達しない不連続に連なった穴または短い溝で形成してもよい。 Furthermore, in each of the above-described embodiments, the base material planned fracture portion 13 and the first and second skin fracture planned portions 15a and 15b are formed by forming the fracture groove portions 3a and 5a by mold forming so that the fracture is easy. However, it may be easily broken by post-processing with a laser or a hot blade. In addition, when forming the base material planned break portion 13, the first skin break planned portion 15a, and the second skin break planned portion 15b by post-processing using a laser, a hot blade or the like, the back surface of the base material 3 is applied to the surface of the skin 5 It may be formed by discontinuous holes or short grooves that do not reach.

加えて、上記の各実施形態では、エアバッグドア部７をパネル構成部材１と一体に形成したが、パネル構成部材１に開口部を形成し、この開口部に別途成形したエアバッグドア部を有するパネル材を嵌め込んで、エアバッグドア部をパネル構成部材と別体に構成してもよい。 In addition, in each of the above-described embodiments, the airbag door portion 7 is formed integrally with the panel constituent member 1, but an opening portion is formed in the panel constituent member 1, and an airbag door portion separately formed in the opening portion is provided. The airbag door portion may be configured separately from the panel constituent member by fitting the panel member having the same.

さらに、上記の各実施形態では、エアバッグドア部７が片開きタイプである場合を例示したが、エアバッグドア部が、前側ドア部と後側ドア部とで構成されて車体前後方向上向きに開く観音開きタイプにも適用することができる。この場合、ヒンジ部１１をドア部本体９の車体前方辺及び車体後方辺の二辺に沿って一体に連続して形成することになる。 Furthermore, in each said embodiment, although the case where the airbag door part 7 was a single opening type was illustrated, an airbag door part is comprised by the front side door part and the rear side door part, and is vehicle body front-back direction upwards It can also be applied to the double door opening type. In this case, the hinge part 11 is integrally and continuously formed along two sides of the door part main body 9 on the front side of the vehicle body and the rear side of the vehicle body.

さらにまた、上記の各実施形態では、内装パネルがインストルメントパネルのパネル構成部材１である場合を示したが、エアバッグドア部付きセンタピラーガーニッシュやエアバッグドア部付きドアトリム等であってもよい。 Furthermore, in each of the above-described embodiments, the case where the interior panel is the panel component 1 of the instrument panel is shown, but a center pillar garnish with an airbag door portion, a door trim with an airbag door portion, or the like may be used. .

この発明は、自動車のインストルメントパネル等、衝突時に乗員を保護する必要がある内装パネルに設けられたエアバッグドア部の構造として有用である。 The present invention is useful as a structure of an airbag door portion provided in an interior panel that needs to protect an occupant in the event of a collision, such as an instrument panel of an automobile.

実施形態１においてエアバッグドア部が閉じた状態で、かつ基材破断予定部を二点鎖線で、第１及び第２表皮破断予定部を一点鎖線で、ヒンジ部を網目を付して、取付部を破線でそれぞれ示すパネル構成部材の平面図である。In the first embodiment, the airbag door portion is closed, the base material planned breakage portion is indicated by a two-dot chain line, the first and second skin breakage planned portions are indicated by a one-dot chain line, and the hinge portion is attached with a mesh. It is a top view of the panel structural member which shows a part with a broken line, respectively. 図１のII−II線における断面図である。It is sectional drawing in the II-II line of FIG. （ａ）は図１のIII −III 線に相当する断面図、（ｂ）は図３（ａ）においてエアバッグドア部が開いた状態を示す。(A) is sectional drawing equivalent to the III-III line of FIG. 1, (b) shows the state which the airbag door part opened in FIG. 3 (a). （ａ）は図１のIV−IV線に相当する断面図、（ｂ）は図４（ａ）において基材破断予定部及び第１表皮破断予定部が破断した状態を示す。(A) is sectional drawing equivalent to the IV-IV line | wire of FIG. 1, (b) shows the state which the base-material fracture | rupture plan part and the 1st skin fracture | rupture plan part fractured | ruptured in FIG. 4 (a). （ａ）は図１のＶ−Ｖ線に相当する断面図、（ｂ）は図５（ａ）において第２表皮破断予定部が破断した状態を示す。(A) is sectional drawing equivalent to the VV line | wire of FIG. 1, (b) shows the state which the 2nd skin fracture | rupture scheduled part fractured | ruptured in Fig.5 (a). 実施形態２の図３相当図であるFIG. 3 is a diagram corresponding to FIG. 3 of the second embodiment. 実施形態３の図３相当図であるFIG. 3 is a diagram corresponding to FIG. 3 of the third embodiment. 実施形態４の図２相当図である。FIG. 6 is a view corresponding to FIG. 2 of the fourth embodiment.

符号の説明Explanation of symbols

１パネル構成部材（内装パネル）
３基材
５表皮
７エアバッグドア部
９ドア部本体
１１ヒンジ部
１３基材破断予定部
１５ａ第１表皮破断予定部
１５ｂ第２表皮破断予定部
１７，６１取付部
２１エアバッグ装置
４５テープ材 1 Panel component (interior panel)
3 Base material 5 Skin 7 Airbag door part 9 Door part main body 11 Hinge part 13 Base material scheduled break part 15a First skin break scheduled part 15b Second skin break scheduled part 17, 61 Attachment part 21 Airbag device 45 Tape material

Claims

剛性樹脂材からなる基材の表面側に可撓性樹脂材からなる表皮が一体に接着された内装パネルに形成され、エアバッグ装置の作動で開く自動車のエアバッグドア部の構造であって、
略矩形状に形成されたドア部本体と、該ドア部本体の少なくとも一辺側から該一辺に沿って一体に連続して延出するヒンジ部とからなり、
上記基材には、基材破断予定部が上記ドア部本体を囲むように略矩形状に形成され、
上記表皮には、上記ドア部本体のヒンジ部側の辺を除く辺に対応する第１表皮破断予定部と、上記ドア部本体のヒンジ部側の辺と直交する両側の第１表皮破断予定部からそれぞれヒンジ部側に延出する一対の第２表皮破断予定部とが形成され、
上記ドア部本体は、上記基材破断予定部及び第１表皮破断予定部の内方領域の基材及び表皮で構成され、
上記ヒンジ部は、上記一対の第２表皮破断予定部で挟まれて該第２表皮破断予定部の延出量に相当する幅を有するように帯状に形成された表皮で構成され、
上記ヒンジ部と該ヒンジ部に対応する基材との接着力は、他の箇所における表皮と基材との接着力よりも弱く設定され、
自動車の衝突時にエアバッグ装置の作動で上記基材破断予定部と第１及び第２表皮破断予定部とが破断することにより、上記ドア部本体がヒンジ部を支点に内装パネルの表側に回動するとともに、上記ヒンジ部が基材から剥離して内装パネルの表側に湾曲変形するように構成されていることを特徴とするエアバッグドア部構造。 A structure of an automobile airbag door part formed on an interior panel in which a skin made of a flexible resin material is integrally bonded to a surface side of a base material made of a rigid resin material, and opened by operation of an airbag device,
The door portion main body formed in a substantially rectangular shape, and a hinge portion extending integrally and continuously along the one side from at least one side of the door portion main body,
The base material is formed in a substantially rectangular shape so that the base material break planned part surrounds the door part main body,
The skin includes a first skin rupture scheduled portion corresponding to a side excluding a side on the hinge portion side of the door portion main body, and a first skin rupture scheduled portion on both sides orthogonal to the side on the hinge portion side of the door portion main body. A pair of second skin rupture scheduled portions extending from the respective hinge portions to the hinge portion side,
The door part body is composed of a base material and a skin in an inner region of the base material planned break part and the first skin target part.
The hinge portion is composed of a skin formed in a band shape so as to have a width corresponding to the extension amount of the second skin rupture planned portion sandwiched between the pair of second skin rupture planned portions.
The adhesive force between the hinge part and the base material corresponding to the hinge part is set to be weaker than the adhesive force between the skin and the base material in other places,
When the airbag device is activated during an automobile collision, the base material breakage planned portion and the first and second skin breakage planned portions break, so that the door body rotates to the front side of the interior panel with the hinge as a fulcrum. In addition, the airbag door portion structure is configured such that the hinge portion is peeled off from the base material and bent to the front side of the interior panel.

請求項１に記載のエアバッグドア部構造において、
基材はポリオレフィン系樹脂材からなり、
基材及び表皮の少なくとも一方の接着面には、ヒンジ部対応箇所を除いて接着性改良処理が施されていることを特徴とするエアバッグドア部構造。 In the airbag door part structure according to claim 1,
The base material is made of polyolefin resin,
An airbag door portion structure characterized in that at least one bonding surface of the base material and the skin is subjected to an adhesion improving process except for a portion corresponding to the hinge portion.

請求項１に記載のエアバッグドア部構造において、
ヒンジ部に対応する基材の表皮接着面には、片面に離型処理が施されたテープ材を離型処理面がヒンジ部側に向くようにして貼り付けられていることを特徴とするエアバッグドア部構造。 In the airbag door part structure according to claim 1,
An air characterized in that a tape material having a release treatment applied to one surface is attached to the skin adhesion surface of the base material corresponding to the hinge portion so that the release treatment surface faces the hinge portion side. Bag door structure.

請求項１乃至３のいずれか１項に記載のエアバッグドア部構造において、
ヒンジ部に対応する基材裏面には、エアバッグ装置の取付部が一体に形成されていることを特徴とするエアバッグドア部構造。 In the airbag door part structure according to any one of claims 1 to 3,
An airbag door portion structure in which an attachment portion of an airbag device is integrally formed on the back surface of the base material corresponding to the hinge portion.