JP3172867B2 - Instrument panel structure for airbag - Google Patents
Instrument panel structure for airbagInfo
- Publication number
- JP3172867B2 JP3172867B2 JP03902197A JP3902197A JP3172867B2 JP 3172867 B2 JP3172867 B2 JP 3172867B2 JP 03902197 A JP03902197 A JP 03902197A JP 3902197 A JP3902197 A JP 3902197A JP 3172867 B2 JP3172867 B2 JP 3172867B2
- Authority
- JP
- Japan
- Prior art keywords
- instrument panel
- door
- airbag
- door member
- thermal expansion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000463 material Substances 0.000 claims description 96
- 238000003776 cleavage reaction Methods 0.000 claims description 16
- 230000007017 scission Effects 0.000 claims description 16
- 239000006260 foam Substances 0.000 claims description 8
- 238000005187 foaming Methods 0.000 claims description 8
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 230000008602 contraction Effects 0.000 description 19
- 238000001816 cooling Methods 0.000 description 19
- 238000010438 heat treatment Methods 0.000 description 11
- 238000010521 absorption reaction Methods 0.000 description 7
- 239000000470 constituent Substances 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 239000004800 polyvinyl chloride Substances 0.000 description 4
- 229920000915 polyvinyl chloride Polymers 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000001595 contractor effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000006261 foam material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- 241000287463 Phalacrocorax Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Landscapes
- Air Bags (AREA)
- Instrument Panels (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、自動車用エアバッ
グのうち特に助手席用エアバッグを折り畳み状態で内側
に収納しており、緊急時のエアバッグの膨張に伴って該
エアバッグを乗員の前方に展開させるように開裂するエ
アバッグ用インストルメントパネル構造に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag for a vehicle, in particular, an airbag for a passenger seat is housed inside in a folded state. The present invention relates to an instrument panel structure for an airbag that is split so as to be deployed forward.
【０００２】[0002]
【従来の技術】この種のエアバッグ用インストルメント
パネルは、一般に、図７に示すように、エアバッグの展
開部に対応する箇所に凹溝やレリーフから平面視Ｈ型形
状や、直線状部分とその直線状部分の長手方向の両端部
からそれぞれＶ字状に分岐拡開させて接続された一対の
傾斜部分とにより平面視略ＷＹ型形状等に形成される開
裂部１１を有しＰＶＣ（ポリ塩化ビニル）やＴＰＯ（ス
チレン系またはオレフィン系熱可塑性エストラマー）で
成形された表皮材１２と、これの内側に対向させて取付
け用基材１５に固定された樹脂板あるいはアルミなどの
金属板からなるドア材１３との間にポリウレタン等の発
泡原料を注入し発泡させて上記表皮材１２、ドア材１３
及び発泡層１４を一体化して構成されるものである。2. Description of the Related Art As shown in FIG. 7 , an instrument panel for an airbag of this type generally has an H-shape in a plan view or a linear portion at a position corresponding to a deployed portion of the airbag from a groove or a relief. and has a longitudinal cleavage 11 which is formed in a planar view substantially WY shape or the like by a pair of inclined portions from both ends connected by branches diverging in a V-shape each of the linear portion PVC ( A skin material 12 formed of polyvinyl chloride) or TPO (styrene-based or olefin-based thermoplastic elastomer), and attached to the inside thereof so as to face each other.
A foaming material such as polyurethane is injected and foamed between a resin material or a door material 13 made of a metal plate such as aluminum fixed to the base material 15 for foaming to form the skin material 12 and the door material 13.
And the foam layer 14 are integrated.
【０００３】上記のようなエアバッグ用インストルメン
トパネルでは、上記表皮材１２及び発泡層１４の構成材
料とドア材１３の構成材料との熱膨張係数が異なるため
に、太陽光線などの照射に伴う加熱時の熱膨張力や車内
冷房などに伴う冷却時の熱収縮力によってインストルメ
ントパネル全体が変形して、平常時における外観を損な
うとか、エアバッグの膨張時における開裂性能に悪影響
を及ぼすという問題がある。このような熱膨張、熱収縮
に伴うインストルメントパネルの変形を防ぐための対応
策として、従来、ドア材１３の構成材料として熱膨張
係数が表皮材１２等の熱膨張係数に近似した小さいもの
を使用する、図７に示しているように、ドア材１３を
分割し、その分割ドア材部１３ａ，１３ｂの間に熱膨張
を吸収するに足りる隙間Ｓを設ける、といった手段が採
用されていた。In the instrument panel for an airbag as described above, the constituent materials of the skin material 12 and the foam layer 14 and the constituent material of the door material 13 have different coefficients of thermal expansion. The problem is that the entire instrument panel is deformed by the thermal expansion force at the time of heating or the thermal contraction force at the time of cooling caused by air conditioning inside the car, impairing the appearance at normal times or adversely affecting the tearing performance when the airbag is inflated. There is. As a countermeasure for preventing the instrument panel from being deformed due to such thermal expansion and thermal contraction, conventionally, as a constituent material of the door material 13, a material whose thermal expansion coefficient is close to the thermal expansion coefficient of the skin material 12 or the like is used. As shown in FIG. 7 , a means has been adopted in which the door member 13 is divided and a gap S sufficient to absorb thermal expansion is provided between the divided door members 13a and 13b.
【０００４】[0004]
【発明が解決しようとする課題】しかし、上記のごとき
熱膨張吸収手段のうち、の場合は、ドア材１３として
要求される強度面や性能面からみて不必要に高価な構成
材料を使用するために、インストルメントパネル全体の
コストアップを招きやすい。またの場合は、上記発泡
層１４を形成するポリウレタン等の発泡原料の注入発泡
時に該発泡原料が上記隙間Ｓから漏れ出さないようにす
るために、分割ドア材部１３ａ，１３ｂの裏面間に亘っ
て隙間Ｓを塞ぐ漏止め用テープｔを貼付したり、成形型
（図示省略する）により隙間Ｓをシールするなど費用及
び工数のかかる処理を要するだけでなく、表皮材１２と
ドア材１３との間に注入される発泡原料の一部が上記隙
間Ｓに入り込んで発泡されることで、インストルメント
パネルの表面の一部に凹部が現われるなどの成形不良の
原因になり易いという問題があった。However, in the case of the thermal expansion absorbing means as described above, use is made of an unnecessarily expensive component material in view of strength and performance required for the door material 13. In addition, the cost of the entire instrument panel is likely to increase. In this case, in order to prevent the foaming material from leaking from the gap S when the foaming material such as polyurethane for forming the foam layer 14 is injected and foamed, the foaming material extends between the back surfaces of the divided door members 13a and 13b. Not only is it necessary to apply a costly and man-hour process such as attaching a sealing tape t for closing the gap S by means of a seal, or sealing the gap S with a molding die (not shown). When a part of the foaming raw material injected into the gap enters the gap S and foams, there is a problem that a molding defect such as a concave portion appears on a part of the surface of the instrument panel is likely to occur.
【０００５】本発明は上記のような実情に鑑みてなされ
たもので、ドア材の形状や取付け形状を工夫することに
より、不必要に高価な材料や漏止め用テープなどを使用
しなくても、熱膨張、熱収縮を適正に吸収させて外観損
失などの問題を克服することができるエアバッグ用イン
ストルメントパネル構造を提供することを目的としてい
る。[0005] The present invention has been made in view of the above circumstances, and by devising the shape and mounting shape of the door material, it is possible to eliminate the need for unnecessary expensive materials and sealing tapes. It is an object of the present invention to provide an instrument panel structure for an airbag which can appropriately absorb thermal expansion and thermal contraction to overcome problems such as appearance loss.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明に係るエアバッグ用インストルメントパネル
構造は、エアバッグの展開部に対応する箇所に開裂部を
有する表皮材とこれに対向するドア材との間に発泡原料
を注入し発泡させて上記表皮材、ドア材及び発泡層を一
体化してなるエアバッグ用インストルメントパネル構造
において、上記ドア材側で上記表皮材における開裂部に
対向する箇所には上記表皮材側に向けて凹部が一体に突
出形成されており、この凹部の頂部分の肉厚を他の部分
の肉厚よりも薄肉にし、この薄肉頂部分により上記ドア
材側に熱変形吸収部を形成していることを特徴とするも
のである。In order to achieve the above object, an instrument panel structure for an airbag according to the present invention comprises a skin material having a cleavage portion at a location corresponding to a deployment portion of an airbag, and a skin material facing the same. In the instrument panel structure for an airbag in which the foam material is injected and foamed between the door material and the foam material, and the skin material, the door material and the foam layer are integrated with each other, at the door material side , the cleaved portion in the skin material is formed.
At the opposing part, a concave part protrudes integrally toward the skin material side.
The thickness of the top part of this concave part is
Of the thinner than the thickness, by the thin top portion and is characterized in that it forms the shape of the thermal deformation absorbers in the door material side.
【０００７】上記のような構成の本発明によれば、太陽
光線などの照射に伴う加熱時の熱膨張力や車内冷房など
に伴う冷却時の熱収縮力をドア材側に一体に突出形成さ
れている凹部の薄肉頂部分での屈曲変形という熱変形吸
収部のスムーズな伸縮作用により吸収し緩和してインス
トルメントパネルの熱変形防止性能を適正確実に発揮さ
せることが可能であるから、ドア材の構成材料としては
該ドア材として要求される強度面や性能面を満足するの
に必要かつ十分な安価な材料を使用すればよく、またド
ア材全体を一体形状にすることも可能で、これを分割す
る場合に必要となる漏止め用テープや特殊な成形型の使
用およびそれらの使用に伴う成形不良の発生を防止する
ことができる。According to the present invention having the above-described structure, the thermal expansion force at the time of heating accompanying irradiation with sunlight or the like and the thermal contraction force at the time of cooling accompanying cooling inside the vehicle are integrally formed so as to protrude toward the door member. Instrumental absorption relaxed to a smooth expansion and contraction action of heat deformation absorbing portion of the bending deformation of a thin top portion of the recess being
Properly and reliably demonstrates the thermal deformation prevention performance of the torque panel
Since it is possible not Rukoto and as the material of the door member may be used necessary and sufficient inexpensive material to satisfy the strength plane and performance aspects required as the door member, also the whole door member Can be formed into an integral shape, and it is possible to prevent the use of a sealing tape and a special molding die necessary for dividing the molding and the occurrence of molding defects due to the use thereof.
【０００８】その上、熱変形吸収部となる凹部の薄肉頂
部分を上記表皮材における開裂部に対向させて形成する
ことにより、熱膨張吸収機能のために表皮材側に向けて
突出形成した凹部をもってエアバッグの膨張時における
ドア材側の破裂部に兼用させてドア材側に熱変形吸収部
とは別に破裂部を形成するものに比べてインストルメン
トパネル全体の製作を容易にすることが可能になるとと
もに、熱膨縮状態においてもその凹部（破裂部）の運動
軌跡と表皮材側の開裂部との位置ずれを無くする、ある
いは、非常に少なくしてインストルメントパネル全体の
開裂性能の向上も図ることが可能である。[0008] Moreover, the thin top portion of the recess as a heat deformation absorbing portion by forming to face the cleavage in the skin material, recess which projects formed toward the skin material side due to thermal expansion absorption function It can also be used as a rupture part on the door material side when the airbag is inflated, making it easier to manufacture the entire instrument panel compared to a rupture part formed separately from the thermal deformation absorbing part on the door material side In addition, in the thermal expansion and contraction state, the positional deviation between the movement trajectory of the concave portion (rupture portion) and the tear portion on the skin material side is eliminated, or the difference is extremely reduced to improve the tear performance of the entire instrument panel. It is also possible to aim.
【０００９】上記本発明に係るエアバッグ用インストル
メントパネル構造において、請求項２に記載のように、
上記ドア材側にそれの取付け用基材の端縁部に係合可能
な係合片を一体形成し、この係合片と上記基材の端縁部
との係合部にも熱膨張吸収用隙間を設けることによっ
て、太陽光線などの照射に伴う加熱時の熱膨張や車内冷
房などに伴う冷却時の熱収縮によりドア材に働く伸縮力
を、上記凹部の薄肉頂部分よりなる熱変形吸収部の伸縮
作用とドア材側に一体形成した係合片と該ドア材の取付
け用基材の端縁部との係合部に設けられた隙間とで吸収
し緩和することが可能であるから、ドア材の端縁部を取
付け用基材にボルト・ナットを用いて固定する場合に比
べてボルト・ナットの使用を省いて部品および組付けコ
ストの低減を図れるのはもちろん、インストルメントパ
ネルの加熱、冷却に伴う熱変形防止性能を適正確実に発
揮させることが可能である。In the above-mentioned instrument panel structure for an airbag according to the present invention ,
An engaging piece engageable with an edge of the mounting base material is integrally formed on the door material side, and a thermal expansion absorbing part is also provided at an engaging portion between the engaging piece and the edge of the base material. By providing a gap for use, the expansion and contraction force acting on the door material due to thermal expansion during heating due to irradiation with sun rays and thermal contraction during cooling due to cooling inside the car, absorbs thermal deformation consisting of the thin top portion of the recess. Part expansion and contraction
Since it is possible to mitigate absorbed by the clearance provided in engagement with the edge portion of the mounting base engaging piece and the door member which is integrally formed on the working and the door member side, the door member The use of bolts and nuts eliminates the use of bolts and nuts to secure the edges of the mounting base to the mounting base material, thereby reducing the cost of parts and assembly, as well as heating and cooling the instrument panel. Therefore, it is possible to properly and reliably exhibit the thermal deformation prevention performance associated with the above.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施の形態を図面
にもとづいて説明する。図１は本発明の第１の実施形態
によるエアバッグ用インストルメントパネル構造を示す
要部の縦断面図であり、このインストルメントパネル１
は、下部に助手席用エアバッグ（図示省略）を折り畳み
状態に収納しているエアバッグケース２を内蔵し、この
エアバッグケース２の前面開口部を被覆するものであっ
て、該インストルメントパネル１は、上記エアバッグの
展開部に対応する箇所に平面視Ｈ型形状や既述のような
平面視略ＷＹ型形状などの開裂部３を有し、ＰＶＣ（ポ
リ塩化ビニル）やＴＰＯ（スチレン系またはオレフィン
系熱可塑性エストラマー）で成形された表皮材４と、こ
れに対向させて端縁部が取付け用基材５に固定された樹
脂板あるいは金属板からなるドア材６と、それら表皮材
４及びドア材６間の空間にポリウレタン樹脂などの発泡
原料を注入し発泡させて形成される発泡層７とを重合さ
せて一体化してなる。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a main part showing an instrument panel structure for an airbag according to a first embodiment of the present invention.
The instrument panel has a built-in airbag case 2 in which a passenger seat airbag (not shown) is stored in a folded state at a lower portion, and covers a front opening of the airbag case 2. 1 has a cleavage portion 3 such as an H-shaped shape in plan view or a substantially WY-shaped shape in plan view as described above at a location corresponding to the deployment portion of the airbag, and is made of PVC (polyvinyl chloride) or TPO (styrene). Material formed of a thermoplastic or olefin-based thermoplastic elastomer), a door material 6 made of a resin plate or a metal plate having an edge fixed to a mounting base 5 facing the material, and a skin material thereof A foaming material such as a polyurethane resin is injected into the space between the door material 4 and the door member 6 and foamed.
【００１１】上記のような基本構成をもつインストルメ
ントパネル１において、上記表皮材４の開裂部３は、図
２に拡大して示すように、該表皮材４の裏面側に形成し
た凹溝８からなり、一方、上記ドア材６側で上記表皮材
４の開裂部３となる凹溝８に対向する箇所には上記表皮
材４側に向けて平面視Ｈ型形状や既述のような平面視略
ＷＹ型形状など上記開裂部３と同様な平面形状をもつ凹
部９が一体に突出形成されている。In the instrument panel 1 having the above-described basic configuration, the cleavage portion 3 of the skin material 4 has a groove 8 formed on the back side of the skin material 4 as shown in an enlarged view in FIG. On the other hand, a portion facing the concave groove 8 which becomes the cleaved portion 3 of the skin material 4 on the door material 6 side has an H-shape in plan view toward the skin material 4 side or a flat surface as described above. A concave portion 9 having a planar shape similar to the above-described cleavage portion 3 such as a substantially WY-shaped shape is integrally formed so as to protrude.
【００１２】そして、上記ドア材６側における凹部９の
頂部分９ａの肉厚ｔ１を該凹部９の他の部分の肉厚ｔ０
よりも薄肉にし、この薄肉頂部分９ａにより上記ドア材
６側の熱変形吸収部を形成させたものである。The thickness t1 of the top portion 9a of the concave portion 9 on the door member 6 side is changed to the thickness t0 of the other portion of the concave portion 9.
The heat deformation absorbing portion on the door member 6 side is formed by the thin top portion 9a.
【００１３】上記のように構成されたエアバッグ用イン
スルメントパネル構造においては、表皮材４に対向する
ドア材６側に上記薄肉頂部分９ａからなる熱変形吸収部
が形成されているので、太陽光線などの照射に伴う加熱
や車内冷房などに伴う冷却によってドア材６に熱膨張力
や熱収縮力が作用した場合、それら熱膨張力や熱収縮力
をドア材６側に一体に形成されている凹部９の薄肉頂部
分９ａでの屈曲変形による伸縮作用により吸収し緩和す
ることが可能である。これによって、ドア材６の構成材
料として、表皮材４および発泡層７の構成材料よりも熱
膨張係数が大きく、ドア材６として要求される強度面や
性能面を満足するのに必要かつ十分な安価な材料を使用
し、ドア材６全体を分割することなく一体形状に成形し
ながら、インストルメントパネル１全体の熱変形による
外観損失などの問題を解消することができる。In the airbag instrument panel structure configured as described above, the thermal deformation absorbing portion composed of the thin top portion 9a is formed on the door material 6 side facing the skin material 4, so that the sun When a thermal expansion force or a heat contraction force acts on the door member 6 due to heating accompanying irradiation with light rays or cooling accompanying vehicle interior cooling, the thermal expansion force or the heat contraction force is integrally formed on the door member 6 side. It can be absorbed and relaxed by the expansion and contraction effect of the thin top portion 9a of the concave portion 9 due to the bending deformation. As a result, the constituent material of the door member 6 has a larger coefficient of thermal expansion than the constituent materials of the skin member 4 and the foam layer 7, and is necessary and sufficient to satisfy the strength and performance required for the door member 6. While using an inexpensive material and forming the entire door member 6 into an integral shape without dividing it, it is possible to eliminate problems such as loss of appearance due to thermal deformation of the entire instrument panel 1.
【００１４】また、この第１の実施形態の場合は、上記
のような熱膨張吸収機能を発揮させるためにドア材６側
から表皮材４側の開裂部３に向けて突出形成した凹部９
を常に表皮材４側の開裂部３に対向する位置に保ちつつ
所定の熱膨張吸収機能を発揮させることが可能であるか
ら、この凹部９をエアバッグの膨張時におけるドア材６
側の破裂部に兼用させてインストルメントパネル１全体
の製作を容易にすることができるとともに、エアバッグ
の膨張時には上記凹部９の薄肉頂部分９ａを破裂させ、
その破裂した端縁部の運動軌跡と表皮材４側の開裂部３
との位置ずれを無くする、あるいは、非常に少なくして
インストルメントパネル１全体の開裂性能の向上も図る
ことができる。In the case of the first embodiment, the recess 9 is formed so as to protrude from the door member 6 toward the cleaved portion 3 on the skin member 4 side so as to exhibit the above-described thermal expansion absorbing function.
It is possible to exhibit a predetermined thermal expansion absorbing function while always maintaining the position facing the cleavage portion 3 on the skin material 4 side.
The thin ridge 9a of the recess 9 is ruptured when the airbag is inflated.
The motion trajectory of the ruptured edge and the cleavage portion 3 on the skin material 4 side
In addition, it is possible to improve the tearing performance of the entire instrument panel 1 by eliminating or extremely reducing the positional deviation.
【００１５】図３は本発明の第２の実施形態によるエア
バッグ用インストルメントパネル構造の要部の拡大縦断
面図であり、この第２の実施形態では、上記ドア材６に
おける表皮材４側の開裂部３に対向する箇所から、その
開裂部３に向けて一体に突出形成した凹部９の頂部分９
ａにドア材６側に凹んだ凹溝１０を形成することで、そ
の頂部分９ａの肉厚を薄肉化し、この薄肉頂部分９ａを
もって上記ドア材６側の熱変形吸収部を形成させたもの
である。その他の構成は上記第１の実施形態と同一であ
るため、該当部分に同一の符号を付してそれらの説明を
省略する。FIG. 3 is an enlarged longitudinal sectional view of a main part of an instrument panel structure for an airbag according to a second embodiment of the present invention. A top portion 9 of a concave portion 9 integrally formed so as to protrude toward a cleavage portion 3 from a portion facing the cleavage portion 3
a, the thickness of the top portion 9a is reduced by forming a concave groove 10 recessed on the door material 6 side, and the heat deformation absorbing portion on the door material 6 side is formed with the thin top portion 9a. It is. Since other configurations are the same as those of the first embodiment, the corresponding portions are denoted by the same reference numerals and description thereof will be omitted.
【００１６】この第２の実施形態によるエアバッグ用イ
ンストルメントパネル１においても上記第１の実施形態
の場合と同様に、太陽光線などの照射に伴う加熱や車内
冷房などに伴う冷却によってドア材６に作用する熱膨張
力や熱収縮力をドア材６側に一体に形成されている凹部
９の薄肉頂部分９ａでの屈曲変形による伸縮作用により
吸収し緩和してインストルメントパネル１全体の熱変形
を防ぐとともに、凹部９をエアバッグの膨張時における
ドア材６側の破裂部に兼用させてインストルメントパネ
ル１全体の開裂性能の向上も図ることができる。In the instrument panel 1 for an airbag according to the second embodiment, similarly to the case of the first embodiment, the door member 6 is heated by irradiation with sunlight or the like or cooled by cooling inside the vehicle. The thermal expansion force and heat contraction force acting on the instrument panel 1 are absorbed and relaxed by the expansion and contraction effect of the thin top portion 9a of the concave portion 9 formed integrally with the door member 6 side, and the thermal deformation of the entire instrument panel 1 is achieved. In addition, the concave portion 9 is also used as a rupture portion on the door member 6 side when the airbag is inflated, so that the tearing performance of the entire instrument panel 1 can be improved.
【００１７】図４は本発明の第３の実施形態によるエア
バッグ用インストルメントパネル構造の要部の拡大縦断
面図であり、この第３の実施形態では、上記ドア材６に
おける表皮材４側の開裂部３に対向する箇所から、その
開裂部３に向けて頂部分９ａを薄肉にして一体に突出形
成した破裂部兼用の凹部９の両側基端部に上記表皮材４
側とは反対側に向けて上記凹部９よりも小さい突出代の
凹部１１，１１を一体に形成させ、これら凹部９の薄肉
頂部分９ａと両側凹部１１，１１とにより上記ドア材６
側の熱変形吸収部を形成させたものである。その他の構
成は上記第１の実施形態と同一であるため、該当部分に
同一の符号を付してそれらの説明を省略する。FIG. 4 is an enlarged vertical sectional view of a main part of an instrument panel structure for an airbag according to a third embodiment of the present invention. open from the point opposite the cleft 3, the skin material 4 a top fraction 9a toward its cleavage site 3 on each side base end portion of the recess 9 for rupture portion and formed integrally projects in the thin
The side is formed integrally with the recess 11, 11 of the small projecting margin than the recess 9 toward the opposite side, the door member by a thin top fraction 9a both sides recesses 11, 11 of the recesses 9 6
The thermal deformation absorbing portion on the side is formed. Since other configurations are the same as those of the first embodiment, the corresponding portions are denoted by the same reference numerals and description thereof will be omitted.
【００１８】この第３の実施形態によるエアバッグ用イ
ンストルメントパネル１においては、太陽光線などの照
射に伴う加熱や車内冷房などに伴う冷却によってドア材
６に作用する熱膨張力や熱収縮力をドア材６側に一体に
形成されている凹部９の薄肉頂部分９ａとその両側の凹
部１１，１１での屈曲変形による伸縮作用により吸収し
緩和してインストルメントパネル１全体の熱変形を防ぐ
一方、エアバッグの膨張時には、ドア材６側の凹部９の
薄肉頂部分９ａで破裂させてインストルメントパネル１
全体の開裂性能を所定どおりに確保させることができ
る。In the instrument panel 1 for an airbag according to the third embodiment, the heat expansion force and the heat contraction force acting on the door member 6 due to the heating caused by the irradiation of sunlight or the like and the cooling caused by the cooling in the vehicle and the like. while preventing the instrument panel 1 overall thermal deformation absorbing relaxed by expansion and contraction action of the bending deformation of a thin top fraction 9a and recesses 11, 11 on both sides of the recess 9 that is formed integrally with the door member 6 side , during inflation of the airbag, the instrument panel 1 by rupture at the thin top fraction 9a of recess 9 of the door member 6 side
The entire cleavage performance can be ensured as predetermined.
【００１９】図５は本発明の第４の実施形態によるエア
バッグ用インストルメントパネル構造の要部の縦断面
図、図６は図５の要部の拡大斜視図であり、この第４の
実施形態では、上記した凹部９の薄肉頂部分９ａからな
る熱変形吸収部のほかに、ドア材６の全周辺部もしくは
三つの周片部近くの位置に上記取付け用基材５の端縁部
５ａに係合可能なほぼ逆Ｌ字状の係合片１３を一体形成
し、これら係合片１３と上記取付け用基材５の端縁部５
ａとの係合部に熱膨張吸収用隙間１４Ａを構成してドア
材６を上記取付け用基材５に対して上記隙間１４Ａの範
囲で自由移動可能に支持させている。[0019] FIG 5 is a fourth longitudinal section view of a main part of the instrument panel for an airbag according to the embodiment of FIG. 6 is an enlarged perspective view of a main part of FIG. 5 of the present invention, the implementation of the fourth In the form, it is formed from the thin top portion 9a of the concave portion 9 described above.
In addition to the heat deformation absorbing portion, a substantially inverted L-shaped engagement that can be engaged with the edge 5a of the mounting base material 5 at the entire peripheral portion of the door member 6 or at a position near three peripheral pieces. Pieces 13 are integrally formed, and these engaging pieces 13 and the edge 5
A gap 14A for absorbing thermal expansion is formed in the engagement portion with the member a, and the door member 6 is supported on the mounting base 5 so as to be freely movable within the range of the gap 14A.
【００２０】一方、上記ドア材６側にはエアバッグケー
ス２の開口周縁部の外側に配置される壁部材１５が一体
に設けられており、この壁部材１５に適当間隔を隔てて
ロの字形の貫通孔１６…が形成されているとともに、上
記エアバッグケース２側からは上記貫通孔１６…に挿通
させることで上記壁部材１５の外側に突出可能なコの字
形の係合部１７…が設けられている。そして、これらコ
の字形の係合部１７…それぞれを上記壁部材１５のロの
字形の貫通孔１６…に挿通させて外側に突出させた状態
で、それら係合部１７…の突出部に亘って閂状の固定部
材１８を挿通させることにより上記ドア材６をエアバッ
グケース２に固定連結させている。On the other hand, on the door member 6 side, a wall member 15 disposed outside the peripheral edge of the opening of the airbag case 2 is integrally provided. Are formed, and from the airbag case 2 side, U-shaped engaging portions 17 that can protrude to the outside of the wall member 15 by being inserted into the through holes 16 are formed. Is provided. Each of the U-shaped engaging portions 17 is inserted through the square-shaped through-holes 16 of the wall member 15 so as to protrude outward, and extends over the protruding portions of the engaging portions 17. The door member 6 is fixedly connected to the airbag case 2 by inserting a bar-shaped fixing member 18 into the airbag case 2.
【００２１】上記構成の第４の実施形態によるインスト
ルメントパネル構造においては、太陽光線などの照射に
伴う加熱や車内冷房などに伴う冷却によってドア材６に
熱膨張力や熱収縮力が作用した場合、それら熱膨張力や
熱収縮力を凹部９の薄肉頂部分９ａからなる熱変形吸収
部とドア材６側の係合片１３と取付け用基材５の端縁部
５ａとの係合部に構成されている熱膨張吸収用隙間１４
Ａとで吸収し緩和することが可能であり、ドア材６の端
縁部を取付け用基材５にボルト・ナットを用いて固定す
る場合に比べてボルト・ナットの使用を省いて部品およ
び組付けコストの低減を図れるのはもちろん、インスト
ルメントパネル１全体の加熱、冷却に伴う熱変形防止性
能を適正確実に発揮させることが可能である。In the instrument panel structure according to the fourth embodiment having the above-described structure, when a thermal expansion force or a thermal contraction force acts on the door member 6 due to heating accompanying irradiation with sunlight or cooling due to cooling in the vehicle, etc. The thermal expansion force and the heat contraction force are absorbed by the heat deformation absorption formed by the thin top portion 9a of the concave portion 9.
Parts and the door member 6 side of the engaging piece 13 and the mounting edge portion 5a and the gap for thermal expansion absorbing is configured with the engaging portion of the substrate 5 14
A and can be absorbed and relaxed, and the use of bolts and nuts is omitted as compared with the case where the edge of the door material 6 is fixed to the mounting base material 5 using bolts and nuts. Not only can the mounting cost be reduced, but also the performance of preventing heat deformation accompanying heating and cooling of the entire instrument panel 1 can be properly and reliably exhibited.
【００２２】また、この第４の実施形態では、上記のよ
うにドア材６側の係合片１３と取付け用基材５の端縁部
５ａとの係合部に熱膨張吸収用隙間１４Ａが形成されて
いてドア材６が取付け用基材５に固定されていないこと
から、エアバッグの膨張展開時には上記ドア材６が外れ
る、あるいは脱落する可能性があるが、ここで、上記ド
ア材６がエアバッグケース２に閂状の固定部材１８を介
して固定連結されているので、エアバッグの膨張展開時
におけるドア材６の外れ、あるいは脱落が確実に防止さ
れるとともに、固定手段として閂構造を採用することに
より、全体の組付け作業の容易化を図ることが可能であ
るIn the fourth embodiment, as described above, the thermal expansion absorbing gap 14A is provided at the engaging portion between the engaging piece 13 on the door member 6 and the edge 5a of the mounting base material 5. Since the door member 6 is formed and the door member 6 is not fixed to the mounting base material 5, the door member 6 may come off or fall off when the airbag is inflated and deployed. Is fixedly connected to the airbag case 2 via a bar-shaped fixing member 18, so that the door member 6 is securely prevented from coming off or falling off when the airbag is inflated and deployed. By adopting, it is possible to facilitate the entire assembly work
【００２３】[0023]
【発明の効果】以上のように、請求項１，２に記載され
た本発明によれば、ドア材の構成材料として該ドア材と
して要求される強度面や性能面を満足するのに必要かつ
十分な材料を用い、またドア材は分割する必要がなく全
体を一体形状としながら、太陽光線などの照射に伴う加
熱時の熱膨張力や車内冷房などに伴う冷却時の熱収縮力
をドア材側に形成された凹部の薄肉頂部分からなる熱変
形吸収部またはその熱変形吸収部と熱膨張吸収用隙間の
伸縮作用により吸収し緩和することが可能であるから、
不必要に高価な材料や漏止め用テープなどの使用を省い
てインストルメントパネル全体を容易安価に製作できる
とともに、凹みなどの成形不良の発生も防止しつつ、熱
膨張、熱収縮を適正に吸収させてインストルメントパネ
ルの熱変形に伴う外観損失などの問題を確実に克服する
ことができる。 As described above, according to the first and second aspects ,
According to the present invention, as the constituent material of the door material, a material necessary and sufficient to satisfy the strength and performance required for the door material is used, and the door material does not need to be divided and the whole is integrated. While having a shape, the thermal expansion force at the time of heating due to irradiation with sunlight or the heat shrinkage force at the time of cooling due to cooling inside the vehicle, etc., is a thermal deformation absorbing portion consisting of a thin top portion of a concave portion formed on the door material side or its heat Because it is possible to absorb and relax by the expansion and contraction action of the deformation absorption part and the thermal expansion absorption gap ,
The entire instrument panel can be easily and inexpensively manufactured by eliminating the use of unnecessarily expensive materials and sealing tapes, and it also absorbs thermal expansion and thermal shrinkage while preventing molding defects such as dents. by Ru can be reliably overcome problems such as appearance losses due to thermal deformation of the instrument panel.
【００２４】しかも、熱変形吸収部となる薄肉頂部分の
凹部を表皮材における開裂部に対向させて形成すること
により、熱膨張吸収機能のために表皮材側に向けて突出
形成した凹部をもってエアバッグの膨張時におけるドア
材側の破裂部に兼用させてドア材側に熱変形吸収部とは
別に破裂部を形成するものに比べてインストルメントパ
ネル全体の製作を一層容易にすることができるととも
に、熱膨張、熱収縮状態においてもその凹部（破裂部）
の運動軌跡と表皮材側の開裂部との位置ずれを無くす
る、あるいは、非常に少なくしてインストルメントパネ
ル全体の開裂性能の向上も図ることができるという効果
を奏する。[0024] Moreover, the air recesses thin top fraction comprising the heat deformation absorbing portion by forming to face the cleavage of the skin material, with a recess which is protruded toward the skin material side due to thermal expansion absorption function In addition to forming a rupture portion on the door material side separately from the thermal deformation absorbing portion on the door material side when the bag is inflated, the manufacture of the entire instrument panel can be further facilitated. Depression (burst) even in thermal expansion and thermal contraction
Effect of eliminating the displacement between the movement trajectory of the skin and the cleavage part on the skin material side, or improving the tearing performance of the entire instrument panel with extremely small displacement
To play .
【００２５】また、請求項２に記載の発明によれば、太
陽光線などの照射に伴う加熱時の熱膨張や車内冷房など
に伴う冷却時の熱収縮によりドア材に働く伸縮力を、ド
ア材側と該ドア材の取付け用基材との取付け部に形成さ
れた隙間でも吸収し緩和することが可能であるから、ド
ア材の端縁部を取付け用基材にボルト・ナットを用いて
固定する場合に比べてボルト・ナットの使用を省いて部
品および組付けコストの低減を図ることができるのはも
ちろん、インストルメントパネルの加熱、冷却に伴う熱
変形防止性能を適正確実に発揮させることができるとい
う効果も奏する。According to the second aspect of the present invention, the expansion and contraction force acting on the door member due to thermal expansion during heating due to irradiation of sunlight or the like and thermal contraction during cooling due to cooling inside the vehicle, etc. since it is possible to absorb relaxed in the gap formed in the mounting portion of the mounting substrate side and the door member, using the bolts and nuts to the base for attaching the edge portion of the door member In addition to reducing the use of bolts and nuts compared to the case of fixing, it is possible to reduce the cost of parts and assembling, as well as properly demonstrate the performance of preventing heat deformation due to heating and cooling of the instrument panel. also to do so have <br/> cormorants effect that the Ru can.
【図１】本発明の第１の実施形態によるエアバッグ用イ
ンストルメントパネル構造を示す要部の縦断面図であ
る。FIG. 1 is a longitudinal sectional view of a main part showing an instrument panel structure for an airbag according to a first embodiment of the present invention.
【図２】図１の要部の拡大図である。FIG. 2 is an enlarged view of a main part of FIG.
【図３】本発明の第２の実施形態によるエアバッグ用イ
ンストルメントパネル構造を示す要部の拡大縦断面図で
ある。FIG. 3 is an enlarged vertical sectional view of a main part showing an instrument panel structure for an airbag according to a second embodiment of the present invention.
【図４】本発明の第３の実施形態によるエアバッグ用イ
ンストルメントパネル構造を示す要部の拡大縦断面図で
ある。FIG. 4 is an enlarged vertical sectional view of a main part showing an instrument panel structure for an airbag according to a third embodiment of the present invention.
【図５】本発明の第４の実施形態によるエアバッグ用イ
ンストルメントパネル構造を示す要部の縦断面図であ
る。It is a longitudinal sectional view of a main part showing a main instrument panel for an airbag according to a fourth embodiment of the present invention; FIG.
【図６】図５の要部の拡大斜視図である。6 is an enlarged perspective view of a main part of FIG.
【図７】従来のエアバッグ用インストルメントパネル構
造の要部の縦断面図である。FIG. 7 is a longitudinal sectional view of a main part of a conventional instrument panel structure for an airbag.
１ インストルメントパネル ２ エアバッグケース ３ 開裂部 ４ 表皮材 ５ 取付け用基材 ５ａ 取付け用基材５の端縁部 ６ ドア材 ７ 発泡層 ９ 凹部 ９ａ 凹部９の薄肉頂部分（熱変形吸収部） １１ 凹部（熱変形吸収部） １３ 係合片 １４ 熱膨張吸収用隙間 DESCRIPTION OF SYMBOLS 1 Instrument panel 2 Airbag case 3 Cleavage part 4 Skin material 5 Mounting base material 5a Edge part of mounting base material 5 Door material 7 Foam layer 9 Concave part 9a Thin top part of concave part 9 (thermal deformation absorption part ) 11 recess (thermal deformation absorbing portion ) 13 engaging piece 14 gap for absorbing thermal expansion
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｂ２９Ｌ 31:58 (72)発明者 柳原 雅彦 愛知県豊田市トヨタ町１番地 トヨタ自 動車株式会社内 (56)参考文献 特開 平７−179161（ＪＰ，Ａ) 特開 平９−20202（ＪＰ，Ａ) 特開 平９−315251（ＪＰ，Ａ) 登録実用新案3023297（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B60R 21/16 - 21/32 Continuation of the front page (51) Int.Cl. 7 Identification symbol FIB29L 31:58 (72) Inventor Masahiko Yanagihara 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (56) References JP-A-7- 179161 (JP, A) JP-A-9-20202 (JP, A) JP-A-9-315251 (JP, A) Registered utility model 3023297 (JP, U) (58) Fields investigated (Int. Cl. 7 , (DB name) B60R 21/16-21/32
Claims (2)
裂部を有する表皮材とこれに対向するドア材との間に発
泡原料を注入し発泡させて上記表皮材、ドア材及び発泡
層を一体化してなるエアバッグ用インストルメントパネ
ル構造において、 上記ドア材側で上記表皮材における開裂部に対向する箇
所には上記表皮材側に向けて凹部が一体に突出形成され
ており、この凹部の頂部分の肉厚を他の部分の肉厚より
も薄肉にし、この薄肉頂部分により上記ドア材側に熱変
形吸収部を形成していることを特徴とするエアバッグ用
インストルメントパネル構造。1. A foaming material is injected and foamed between a skin material having a cleaved portion at a position corresponding to a deployment portion of an airbag and a door material facing the same, and the skin material, the door material and the foam layer are formed. In the integrated instrument panel structure for an airbag, the door material side faces a cleavage portion of the skin material.
A recess is integrally formed at the place to project toward the skin material side.
The thickness of the top part of this recess is larger than the thickness of the other parts.
Also thin, instrument panel structure for an air bag, characterized in that it forms the shape of the thermal deformation absorbers in the door member side by the thin top portion.
端縁部に係合可能な係合片が一体形成され、この係合片
と上記取付け用基材の端縁部との係合部にも熱膨張吸収
用隙間が設けられている請求項１に記載のエアバッグ用
インストルメントパネル構造。2. An engaging piece engageable with an edge of the mounting base material is integrally formed on the door material side, and the engaging piece and the edge of the mounting base material are formed integrally with each other. instrument panel for an air bag according to claim 1, crevice thermal expansion absorbing in the engaging portion is provided.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03902197A JP3172867B2 (en) | 1997-02-24 | 1997-02-24 | Instrument panel structure for airbag |
| AU53924/98A AU731598B2 (en) | 1997-02-17 | 1998-02-13 | Instrument panel for air bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03902197A JP3172867B2 (en) | 1997-02-24 | 1997-02-24 | Instrument panel structure for airbag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10236263A JPH10236263A (en) | 1998-09-08 |
| JP3172867B2 true JP3172867B2 (en) | 2001-06-04 |
Family
ID=12541466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03902197A Expired - Fee Related JP3172867B2 (en) | 1997-02-17 | 1997-02-24 | Instrument panel structure for airbag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3172867B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009107587A (en) * | 2007-10-31 | 2009-05-21 | Takata Corp | Interior part and airbag device of vehicle |
| JP2013047087A (en) * | 2011-08-29 | 2013-03-07 | Autoliv Development Ab | Airbag cover |
| US20140217708A1 (en) * | 2013-02-07 | 2014-08-07 | GM Global Technology Operations LLC | Outer cover having reinforcing fibers for an instrument panel airbag door |
| KR102205969B1 (en) * | 2014-08-13 | 2021-01-21 | 현대모비스 주식회사 | Air bag module |
-
1997
- 1997-02-24 JP JP03902197A patent/JP3172867B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10236263A (en) | 1998-09-08 |
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