JP3386926B2 - Structure of airbag door of automobile and its manufacturing method - Google Patents
Structure of airbag door of automobile and its manufacturing methodInfo
- Publication number
- JP3386926B2 JP3386926B2 JP12962495A JP12962495A JP3386926B2 JP 3386926 B2 JP3386926 B2 JP 3386926B2 JP 12962495 A JP12962495 A JP 12962495A JP 12962495 A JP12962495 A JP 12962495A JP 3386926 B2 JP3386926 B2 JP 3386926B2
- Authority
- JP
- Japan
- Prior art keywords
- skin
- bent
- acute
- airbag
- flat
- 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
- 238000004519 manufacturing process Methods 0.000 title description 8
- 229920003002 synthetic resin Polymers 0.000 claims description 24
- 239000000057 synthetic resin Substances 0.000 claims description 24
- 239000011324 bead Substances 0.000 claims description 17
- 239000006260 foam Substances 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 13
- 230000001154 acute effect Effects 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 239000006261 foam material Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 1
- 210000003491 skin Anatomy 0.000 description 84
- 238000000465 moulding Methods 0.000 description 15
- 239000011162 core material Substances 0.000 description 8
- 238000010097 foam moulding Methods 0.000 description 7
- 230000006866 deterioration Effects 0.000 description 5
- 238000005187 foaming Methods 0.000 description 5
- 210000002615 epidermis Anatomy 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920002397 thermoplastic olefin Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Landscapes
- Air Bags (AREA)
- Instrument Panels (AREA)
- Moulding By Coating Moulds (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は自動車のエアバッグ装
置に関連し、特にはそのエアバッグドア部の構造および
その製法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile air bag device, and more particularly to a structure of an air bag door portion and a manufacturing method thereof.
【０００２】[0002]
【従来の技術】例えば自動車の助手席側に設けられるエ
アバッグ装置は、添付の図面の図１８に示すように、折
り畳まれたエアバッグＡがエアバッグ収容容器Ｃ内にエ
アバッグ作動装置Ｉとともに収容されて助手席前面のイ
ンストルメントパネルＰ内側に格納されている。エアバ
ッグ収容容器Ｃの上部は、エアバッグＡが車室内に展開
するための開口部Ｏとして構成されており、この開口部
ＯはインストルメントパネルＰに一体に形成されたエア
バッグドア部Ｄによって覆われている。このエアバッグ
装置は、一旦自動車が大きな衝撃を受けた時には前記作
動装置Ｉが作動し、図２０に示すように、膨張したエア
バッグＡがインストルメントパネルＰに一体に形成され
たエアバッグドア部Ｄを内側から押し開いて車室内に展
開するようになっている。2. Description of the Related Art For example, as shown in FIG. 18 of the accompanying drawings, a folded airbag A has a folded airbag A inside an airbag container C together with an airbag operating device I as shown in FIG. 18 of the accompanying drawings. It is housed and stored inside the instrument panel P in front of the passenger seat. An upper portion of the airbag accommodating container C is configured as an opening O through which the airbag A is deployed in the vehicle compartment. The opening O is formed by an airbag door D formed integrally with the instrument panel P. Is covered. In this airbag device, the operating device I is actuated once the vehicle receives a large impact, and the inflated airbag A is integrally formed on the instrument panel P as shown in FIG. It is designed so that D can be pushed open from the inside and deployed in the passenger compartment.
【０００３】インストルメントパネルＰは図のように合
成樹脂発泡層７１上面に表皮７２を一体に有し、該表皮
７２のエアバッグ展開開口部Ｏに対応する所定位置には
エアバッグドア部Ｄを画定する薄肉の破断予定部７３が
形成されている。図中符号７４はインストルメントパネ
ルＰの裏面に設けられた芯材、７５はエアバッグドア用
芯材、７６はエアバッグ収容容器Ｃと芯材７４（および
エアバッグドア用芯材７５）とを固定する取付部材、Ｔ
はインストルメントパネルＰの破断予定部である。As shown in the figure, the instrument panel P integrally has an outer skin 72 on the upper surface of the synthetic resin foam layer 71, and an airbag door portion D is provided at a predetermined position of the outer skin 72 corresponding to the airbag deployment opening O. A thin breakable portion 73 that demarcates is formed. In the figure, reference numeral 74 is a core material provided on the back surface of the instrument panel P, 75 is a core material for an airbag door, 76 is an airbag container C and the core material 74 (and a core material 75 for an airbag door). Mounting member to be fixed, T
Is a planned breakage portion of the instrument panel P.
【０００４】ところで、インストルメントパネルＰの表
皮７２は一般に塩化ビニール等の軟質プラスチックのパ
ウダースラッシュ成形あるいは真空成形等によって所定
の表皮形状に成形される。そして、エアバッグドア部Ｄ
を画定する前記薄肉の破断予定部７３は、エアバッグＡ
が膨張する際に確実に破断することができるように、表
皮７２の一般部分の厚みが約０．８ｍｍから１．２ｍｍ
である場合、概ね０．３ｍｍ以下、好ましくは０．１ｍ
ｍ以下の厚みに形成されることが望ましい。By the way, the skin 72 of the instrument panel P is generally molded into a predetermined skin shape by powder slush molding or vacuum molding of soft plastic such as vinyl chloride. And the airbag door part D
The thin-walled to-be-ruptured portion 73 that defines the
The thickness of the general portion of the skin 72 is about 0.8 mm to 1.2 mm so that it can be reliably broken when it expands.
If it is, it is approximately 0.3 mm or less, preferably 0.1 m
It is desirable to be formed to a thickness of m or less.
【０００５】しかるに、この表皮７２における破断予定
部７３の厚みが極めて薄くなるために、表皮成形の脱型
時に当該破断予定部７３が破れるおそれがある。また、
インストルメントパネルＰの表皮７２は、車室内に照射
される太陽光線やそれに起因する熱履歴によって経時的
に劣化し収縮することが知られている。このような場合
において、強度が低い薄肉の破断予定部７３でこの劣
化、収縮の影響が大となり、その結果、表皮７２の破断
予定部７３に亀裂が生じたり内側の合成樹脂発泡体層７
１が露出するなどの外観不良を生じやすいという問題が
指摘されている。However, since the thickness of the breakable portion 73 of the skin 72 is extremely thin, there is a possibility that the breakable portion 73 is broken when the skin is removed from the mold. Also,
It is known that the skin 72 of the instrument panel P deteriorates and shrinks over time due to the sunlight rays radiated into the vehicle compartment and the heat history resulting therefrom. In such a case, the influence of this deterioration and shrinkage becomes great in the thin-walled to-be-ruptured portion 73 having low strength, and as a result, the to-be-broken portion 73 of the skin 72 is cracked or the inner synthetic resin foam layer 7 is cracked.
It has been pointed out that there is a problem in that a defective appearance such as 1 being exposed is likely to occur.
【０００６】一方、当該破断予定部における表皮の厚み
を、劣化による亀裂を生じにくくなるまで大きくする
と、今度はエアバッグＡの膨張時に該破断予定部７３が
スムーズに破断しなくなるおそれもある。On the other hand, if the thickness of the skin at the portion to be broken is increased to such a degree that cracks due to deterioration are less likely to occur, then the portion to be broken 73 may not smoothly break when the airbag A is inflated.
【０００７】[0007]
【発明が解決しようとする課題】この発明は、薄肉の破
断予定部に表皮の劣化、収縮による亀裂などの外観不良
の発生を防ぎ、しかもエアバッグの膨張時には確実に破
断させることができるインストルメントパネルのエアバ
ッグドア部の構造を提供しようとするものである。そし
て、表皮の成形の際には、薄肉の破断予定部を効率よく
かつ破れなどを生じることなく形成することができるイ
ンストルメントパネルのエアバッグドア部の製法を提供
しようとするものである。SUMMARY OF THE INVENTION The present invention is an instrument capable of preventing the appearance of defects such as cracks due to deterioration of the skin and shrinkage at a thin portion to be broken and reliably breaking the airbag when inflated. It is intended to provide the structure of the airbag part of the panel. Further, it is an object of the present invention to provide a method of manufacturing an airbag door portion of an instrument panel, which can efficiently form a thin portion to be broken at the time of forming the skin, without causing breakage.
【０００８】[0008]
【課題を解決するための手段】すなわち、請求項１の発
明は、合成樹脂発泡層上面にエアバッグドア部を画定す
る破断予定部が形成された表皮を一体に有するエアバッ
グドア部において、前記表皮は前記破断予定部に沿って
その裏面側に折り曲げられたフランジ部の合接部を有す
るとともに、前記フランジ部の合接部先端の折り曲げ部
に鋭角状薄肉部が平坦状一般部と交互に形成されている
ことを特徴とする自動車のエアバッグドア部の構造に係
る。That is, the invention of claim 1 provides an airbag door portion integrally having a skin having a breaking portion for defining the airbag door portion formed on the upper surface of the synthetic resin foam layer. The skin has a joint portion of the flange portion that is bent on the back surface side along the portion to be broken, and an acute-angled thin portion alternates with a flat general portion at the bent portion at the tip of the joint portion of the flange portion. The present invention relates to the structure of the airbag door portion of an automobile, which is characterized by being formed.
【０００９】また、請求項２の発明は、請求項１におい
て、前記裏面側に折り曲げられたフランジ部の合接部の
長さが４ないし１０ｍｍで、前記折り曲げ部の鋭角状薄
肉部の肉厚が０．１ｍｍ以下でかつ平坦状一般部の肉厚
が０．２ないし０．４ｍｍである自動車のエアバッグド
ア部の構造に係る。According to the invention of claim 2, in claim 1, the joint portion of the flange portion bent to the back surface side has a length of 4 to 10 mm, and the thickness of the acute-angled thin portion of the bent portion is large. Is 0.1 mm or less and the thickness of the flat general portion is 0.2 to 0.4 mm.
【００１０】請求項３の発明は、請求項１または２にお
いて、交互に形成された鋭角状薄肉部の長さが３ないし
５ｍｍで、平坦な一般部の長さが１０ないし２０ｍｍで
ある自動車のエアバッグドア部の構造に係る。According to a third aspect of the present invention, in the automobile according to the first or second aspect, the alternately formed acute-angled thin-walled portions have a length of 3 to 5 mm and the flat general portion has a length of 10 to 20 mm. It relates to the structure of the airbag door.
【００１１】請求項４の発明は、請求項１ないし３のい
ずれかにおいて、前記鋭角状薄肉部および平坦な一般部
の幅折り曲げ部の交互形成部分が最初に破断される破断
予定部にのみ形成され、他の破断予定部は平坦状一般部
によって形成された自動車のエアバッグドア部の構造に
係る。According to a fourth aspect of the present invention, in any one of the first to third aspects, the alternate-formed portions of the sharp-angled thin-walled portion and the flat-width general-width folded portion are formed only at a portion to be fractured first. The other part to be broken is related to the structure of the airbag part of the automobile formed by the flat general part.
【００１２】請求項５の発明は、表皮のパウダースラッ
シュ成形型の表皮破断予定部に、厚み０．８ないし１．
０ｍｍで高さ４ないし１０ｍｍのビード部を突設すると
ともに、前記ビード部先端を鋭角状にした鋭角部と平坦
な一般部とを交互に形成し、これに表皮用樹脂材料を導
入して、破断予定部に沿ってその裏面側に折り曲げられ
たフランジ部と前記フランジ部先端の折り曲げ部に鋭角
状薄肉部と平坦状一般部が交互に形成された表皮を得る
工程と、前記工程で得られた表皮裏面側に合成樹脂発泡
材料を注入し合成樹脂発泡層を形成して、破断予定部に
沿ってその裏面側に折り曲げられたフランジ部の合接部
を有するとともに、前記フランジ部の合接部先端の折り
曲げ部に鋭角状薄肉部が平坦状一般部と交互に形成され
た表皮を有するエアバッグドア部を得る工程とを含むこ
とを特徴とする自動車のエアバッグドア部の製法に係
る。According to a fifth aspect of the present invention, a thickness of 0.8 to 1.
A bead portion having a height of 0 to 4 mm and a height of 4 to 10 mm is projected, and an acute-angled portion having a sharp-edged bead tip and a flat general portion are alternately formed, and a resin material for a skin is introduced into the bead portion. A step of obtaining a skin in which an acute-angled thin-walled portion and a flat-shaped general portion are alternately formed in the bent portion of the flange portion bent to the back surface side along the planned breaking portion and the flange portion tip, and obtained in the above step A synthetic resin foam material is injected into the back surface of the skin to form a synthetic resin foam layer, and the joint portion of the flange portion is bent along the planned breakage portion on the back surface side, and the joint portion of the flange portion is joined. And a step of obtaining an airbag door portion having a skin in which sharp-angled thin portions are alternately formed with flat general portions at the bent portion at the tip of the portion, the method of manufacturing an airbag door portion of an automobile.
【００１３】[0013]
【実施例】以下添付の図面に従ってこの発明を詳細に説
明する。図１はこの発明構造の一実施例を示す自動車の
インストルメントパネルの概略斜視図、図２はそのエア
バッグ装置が取り付けられた部分の断面図、図３は図２
の矢印３部分の拡大断面図、図４はこの発明構造のエア
バッグドア部が開口した状態を示す断面図、図５はこの
発明構造のインストルメントパネルの表皮フランジ部の
合接部に沿って切断した拡大断面図、図６は図５の６Ａ
−６Ａ線および６Ｂ−６Ｂ線で切断した断面図、図７は
この発明構造に係る表皮を裏面側から見た要部の斜視
図、図８はこの発明構造の表皮の他の例を示す要部の拡
大断面図、図９は同じく表皮の他の例を示す拡大断面図
である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. 1 is a schematic perspective view of an instrument panel of an automobile showing one embodiment of the structure of the present invention, FIG. 2 is a sectional view of a portion to which the airbag device is attached, and FIG. 3 is FIG.
3 is an enlarged sectional view of a portion indicated by an arrow 3 in FIG. 4, FIG. 4 is a sectional view showing a state in which the airbag door portion of the invention structure is opened, and FIG. 5 is a view showing a joint portion of a skin flange portion of the instrument panel of the invention structure. FIG. 6A of FIG. 5 is an enlarged sectional view cut.
-6A and 6B-6B line cross-sectional views, FIG. 7 is a perspective view of a main part of the skin according to the invention structure seen from the back side, and FIG. 8 is a schematic view showing another example of the skin of the invention structure. 9 is an enlarged cross-sectional view showing another example of the skin.
【００１４】また、図１０ないし図１７はこの発明のエ
アバッグドア部の製法に関するものであって、図１０は
表皮の成形に用いられるパウダースラッシュ成形型を示
す断面図、図１１はそのビード部を示す要部の斜視図、
図１２は前記パウダースラッシュ成形型によって表皮を
成形する状態を示す断面図、図１３はビード部における
表皮成形状態を示す断面図、図１４は表皮の裏面側に合
成樹脂発泡材料を注入する状態を示す断面図、図１５は
その発泡成形状態を示す断面図、図１６は発泡成形前に
おける表皮フランジ部の状態を示す断面図、図１７は発
泡成形時における表皮フランジ部の状態を示す断面図で
ある。10 to 17 relate to a method of manufacturing an airbag door portion according to the present invention. FIG. 10 is a sectional view showing a powder slush molding die used for molding a skin, and FIG. 11 is a bead portion thereof. Is a perspective view of the main part showing
FIG. 12 is a cross-sectional view showing a state in which a skin is molded by the powder slush molding die, FIG. 13 is a cross-sectional view showing a skin-molded state in a bead portion, and FIG. 14 is a state in which a synthetic resin foam material is injected on the back surface side of the skin. FIG. 15 is a cross-sectional view showing the foam-molded state thereof, FIG. 16 is a cross-sectional view showing the state of the skin flange portion before foam-molding, and FIG. 17 is a cross-sectional view showing the state of the skin flange portion at the time of foam-molding. is there.
【００１５】図１ないし図４に示したように、この発明
は、例えば前記したようなインストルメントパネル１０
に係り、特に合成樹脂発泡層１１上面にエアバッグドア
部Ｄを画定する破断予定部１４が形成された表皮１２を
一体に有するものに係る。なお、図示したエアバッグ装
置は先の従来技術の項で説明したものと同様の構造を有
し、符号Ａはエアバッグ、Ｉは前記エアバッグＡの作動
装置、Ｃはエアバッグ収容容器、Ｏはエアバッグの展開
開口部、Ｔはインストルメントパネルの開裂（予定）
部、２０はインストルメントパネルの芯材、２１はエア
バッグ展開開口部上方に配置されたエアバッグドア用芯
材、２２，２３は前記インストルメントパネル１０にエ
アバッグ収容容器Ｃを固定する取付部材である。As shown in FIGS. 1 to 4, the present invention provides an instrument panel 10 as described above, for example.
In particular, the present invention relates to one having an outer skin 12 integrally formed with an expected breaking portion 14 defining an airbag door portion D on the upper surface of the synthetic resin foam layer 11. The illustrated airbag device has a structure similar to that described in the section of the prior art, reference numeral A is an airbag, I is an operating device of the airbag A, C is an airbag container, and O is a container. Is the deployment opening of the airbag, T is the tearing of the instrument panel (planned)
Reference numeral 20 denotes a core material of an instrument panel, 21 denotes a core material for an airbag door disposed above an airbag deployment opening, and 22 and 23 denote attachment members for fixing the air bag accommodating container C to the instrument panel 10. Is.
【００１６】インストルメントパネル１０は所定の形状
に形成されたもので、発泡ポリウレタンなどからなる合
成樹脂発泡層１１の上面が表皮１２によって覆われてい
る。この表皮１２は公知のパウダースラッシュ成形など
によって成形され、その材質としては一般的に軟質ＰＶ
Ｃ、ＰＶＣ−ウレタン共重合体または熱可塑性ポリオレ
フィンエラストマーなどが使用される。The instrument panel 10 is formed in a predetermined shape, and an upper surface of a synthetic resin foam layer 11 made of polyurethane foam or the like is covered with a skin 12. The skin 12 is formed by known powder slush molding, etc., and its material is generally soft PV.
C, PVC-urethane copolymer, thermoplastic polyolefin elastomer or the like is used.
【００１７】そして、この表皮１２には、表皮１２の破
断予定部１４に沿って裏面側に折り曲げられることによ
るフランジ部１３，１３の合接部１３Ｊが形成されてい
る。図７にその表皮を裏面側から見た図を示す。この表
皮フランジ部の合接部１３Ｊは合成樹脂発泡層１１内で
密に合接されている。この合接部１３Ｊの折り曲げ長さ
は４ないし１０ｍｍ程度が好ましい。そして、このフラ
ンジ部１３，１３の合接部１３Ｊはその先端の折り曲げ
部１５が他の一般部分よりも薄肉に形成されることによ
って、エアバッグＡの膨張によってエアバッグドア部Ｄ
が内側から押圧された際に破断する。The outer skin 12 is formed with an abutting portion 13J of the flange portions 13 and 13 which is formed by bending the outer skin 12 along the planned breaking portion 14 toward the back surface. FIG. 7 shows a view of the epidermis viewed from the back side. The joint portion 13J of the skin flange portion is closely joined in the synthetic resin foam layer 11. The bending length of the contact portion 13J is preferably about 4 to 10 mm. The joint portion 13J of the flange portions 13 and 13 has a bent portion 15 at the tip thereof formed thinner than other general portions, so that the airbag A is inflated due to the expansion of the airbag A.
Breaks when pressed from the inside.
【００１８】前記フランジ部１３，１３の合接部１３Ｊ
の先端の折り曲げ部１５には、図５ないし図７に図示し
たように、鋭角状薄肉部１６と平坦状一般部１７とが交
互に形成されている。これは、表皮１２の破断予定部１
４となる折り曲げ部１５の強度を調整するもので、エア
バッグ作動膨張時においてエアバッグドア部Ｄを速やか
にかつ確実に破断させるものである。A joint portion 13J of the flange portions 13 and 13
As shown in FIGS. 5 to 7, sharp bent thin portions 16 and flat general portions 17 are alternately formed in the bent portion 15 at the tip of the. This is the expected breakage part 1 of the skin 12.
This is to adjust the strength of the bent portion 15 to be 4, and to rupture the airbag door portion D promptly and reliably when the airbag is inflated.
【００１９】鋭角状薄肉部１６は、図５および図６に示
すように、前記折り曲げ部１５を平坦状一般部１７より
も薄肉とするとともに、合成樹脂発泡層１１に向かって
尖る鋭角状とすることにより構成されている。それによ
り、表皮１２における前記破断予定部１４の位置が確実
に定められ、かつエアバッグの膨張圧力で容易に破断す
る強度が付与される。また、平坦状一般部１７は、破断
予定部１４の位置を画定しその破断しやすさを保ちなが
ら、表皮１２の強度を保持するためのもので、折り曲げ
部１５先端を平坦な形状としかつ前記鋭角状薄肉部１６
よりも肉厚で、その他の一般部分よりは薄肉な構成とさ
れている。As shown in FIGS. 5 and 6, the acute-angled thin portion 16 has a thinner bent portion 15 than the flat general portion 17 and has an acute-angled shape that is sharpened toward the synthetic resin foam layer 11. It is composed of As a result, the position of the breakable portion 14 in the outer skin 12 is reliably determined, and strength that easily breaks due to the inflation pressure of the airbag is imparted. The flat general portion 17 defines the position of the scheduled breaking portion 14 and maintains the strength of the outer skin 12 while maintaining the easiness of breaking, and the tip of the bent portion 15 has a flat shape. Acute-angled thin-walled part 16
It is thicker than the other general parts.
【００２０】前記鋭角状薄肉部１６および平坦状一般部
１７の肉厚と長さは以下のように形成することが好まし
い。すなわち、表皮１２におけるフランジ部以外の一般
部分の厚みｔが０．８から１．２ｍｍである場合、前記
折り曲げ部１５先端の鋭角状薄肉部１６の肉厚ｔ１は
０．１ｍｍ以下、平坦状一般部１７の肉厚ｔ２は０．２
から０．４ｍｍとするのが好ましい。また、交互に形成
される鋭角状薄肉部１６の長さｗ１は約３ないし５ｍｍ
とし、平坦状一般部１７の長さｗ２は約１０ないし２０
ｍｍとするのが好ましい。The thickness and length of the acute-angled thin portion 16 and the flat general portion 17 are preferably formed as follows. That is, when the thickness t of the general portion of the skin 12 other than the flange portion is 0.8 to 1.2 mm, the thickness t1 of the acute-angled thin portion 16 at the tip of the bent portion 15 is 0.1 mm or less, and the flat portion is generally flat. The thickness t2 of the portion 17 is 0.2
To 0.4 mm is preferable. Further, the length w1 of the acute-angled thin portions 16 formed alternately is about 3 to 5 mm.
And the length w2 of the flat general portion 17 is about 10 to 20.
It is preferably mm.
【００２１】鋭角状薄肉部１６と平坦状一般部１７との
肉厚が上記範囲より大きくなった場合、エアバッグ膨張
の際に破断予定部１４が確実かつ速やかに破断しないお
それがある。また、前記鋭角状薄肉部１６の一つの長さ
を５ｍｍより大きくすると、表皮成形時の脱型の際に、
前記鋭角状薄肉部１６において破れやすくなる上、当該
破断予定部１４が必要以上に脆弱となる。一方、鋭角状
薄肉部１６の一つの長さが３ｍｍより小さい場合では、
折り曲げ部１５の強度と破断しやすさのバランスがとり
にくくなる。さらに、破断予定部１４における各鋭角状
薄肉部１６間の間隔（平坦状一般部１７の長さ）が１０
ｍｍ以下でも、表皮成形の際の脱型が困難で鋭角状薄肉
部１６が破れるおそれがあり、また前記破断予定部１４
の強度が充分ではなくなる。さらにまた、各鋭角状薄肉
部１６間の間隔が２０ｍｍより長くなると、鋭角状薄肉
部１６が効果的に作用しない。If the wall thickness of the acute-angled thin portion 16 and the flat general portion 17 is larger than the above range, there is a possibility that the portion 14 to be fractured may not be surely and promptly fractured when the airbag is inflated. If the length of one of the acute-angled thin-walled portions 16 is made larger than 5 mm, when the mold is removed during skin forming,
The sharp-angled thin portion 16 is likely to be torn, and the to-be-broken portion 14 is unnecessarily fragile. On the other hand, when one length of the acute-angled thin portion 16 is smaller than 3 mm,
It becomes difficult to balance the strength of the bent portion 15 with the easiness of breaking. Further, the interval (length of the flat general portion 17) between the thin acute-angle portions 16 in the portion 14 to be broken is 10
Even if the thickness is less than or equal to mm, it is difficult to remove the mold at the time of forming the skin, and the sharp-edged thin portion 16 may be broken.
Is not strong enough. Furthermore, when the distance between the acute-angled thin portions 16 is longer than 20 mm, the acute-angled thin portions 16 do not act effectively.
【００２２】なお、前記鋭角状薄肉部１６および平坦状
一般部１７の肉厚ｔ１，ｔ２および長さｗ１，ｗ２は前
記した範囲内で、形成されるインストルメントパネルの
種類や材質などによって適宜に設定することができる。
また、前記鋭角状薄肉部１６は、表皮１２の破断予定部
１４において最初に破断されるべき部分のみに形成して
もよい。すなわち、図１ではエアバッグドア部Ｄのドア
コーナー部Ｄ１などである。それによって、エアバッグ
Ａの膨張の際のエアバッグドア部Ｄの開放を速やかに行
なうことができる。The wall thicknesses t1 and t2 and the lengths w1 and w2 of the acute-angled thin portion 16 and the flat general portion 17 are within the ranges described above, and are appropriately selected depending on the type and material of the instrument panel to be formed. Can be set.
Further, the acute-angle thin portion 16 may be formed only in the portion to be broken first in the portion 14 to be broken of the skin 12. That is, in FIG. 1, it is a door corner portion D1 of the airbag door portion D and the like. As a result, the airbag door portion D can be quickly opened when the airbag A is inflated.
【００２３】さらに、前記フランジ部１３の先端折り曲
げ部１５に、鋭角状薄肉部１６および平坦状一般部１７
を交互に形成したことにより、特に強度の低い部分が、
前記破断予定部１４上にミシン目状に形成される。それ
によって、エアバッグＡが膨張しエアバッグドア部Ｄを
裏面から押圧した際には、その押圧力が、折り曲げ部１
５の鋭角状薄肉部１６に集中し、図４に示されるよう
に、この部分で表皮１２を確実に破断させることができ
る。特に、エアバッグの展開時には、破断予定部の周囲
の表皮に亀裂が生じるのを防ぎ、当該破断部分の破片な
どが飛散することが減少される。また、表皮成形時にお
ける脱型の際には、鋭角状薄肉部１６部分が破れにくく
なるので、当該表皮の成形を効率的に行なうことができ
る。Further, at the tip bent portion 15 of the flange portion 13, an acute angle thin portion 16 and a flat general portion 17 are provided.
By forming alternately, especially low strength part,
Perforations are formed on the breakable portion 14. As a result, when the airbag A inflates and presses the airbag door portion D from the back surface, the pressing force is applied to the bending portion 1
5 concentrates on the acute-angled thin portion 16, and as shown in FIG. 4, the skin 12 can be reliably broken at this portion. In particular, at the time of deployment of the airbag, it is possible to prevent cracks from being generated in the skin around the portion to be broken, and to reduce scattering of fragments and the like at the broken portion. Moreover, since the acute-angled thin-walled portion 16 is less likely to be broken at the time of demolding at the time of forming the outer skin, the outer skin can be efficiently formed.
【００２４】加えて、前記鋭角状薄肉部１６と平坦状一
般部１７とは、表皮裏面側に折り曲げられたフランジ部
１３の先端の折り曲げ部１５に設けられ、しかも合成樹
脂発泡層１１によってそのフランジ部１３が互いに合接
されているので、前記破断予定部１４がインストルメン
トパネル１０の表面上に目立たず、外観が極めて良好で
ある。さらに、太陽光線等の影響を受けにくくなるの
で、経時的な劣化および収縮などで前記破断予定部に亀
裂などが発生するのを抑えることができる。In addition, the sharp-edged thin-walled portion 16 and the flat-shaped general portion 17 are provided at the bent portion 15 at the tip of the flange portion 13 bent to the back surface side of the skin, and the flange is formed by the synthetic resin foam layer 11. Since the parts 13 are in contact with each other, the breakable part 14 is not conspicuous on the surface of the instrument panel 10, and the appearance is very good. Furthermore, since it is less likely to be affected by sunlight or the like, it is possible to suppress the occurrence of cracks or the like at the portion to be broken due to deterioration or shrinkage over time.
【００２５】図８はこの発明構造の表皮の他の例を示す
ものである。この表皮２４においては、裏面側に凹陥す
る側壁２６，２６を介して凹溝部２５が設けられ、一の
側壁２６を表皮裏面側にさらに延ばすことにより、凹溝
部２５の一側にフランジ部２７，２７を形成したもので
ある。符号２８は折り曲げ部、２９は鋭角状薄肉部であ
る。この構造によれば、インストルメントパネルのデザ
イン上の自由度が大となる。FIG. 8 shows another example of the skin of the structure of the present invention. In this skin 24, a recessed groove portion 25 is provided via side walls 26, 26 which are recessed on the back surface side, and by extending one side wall 26 further to the back surface side of the skin, a flange portion 27 on one side of the recessed groove portion 25, 27 is formed. Reference numeral 28 is a bent portion, and 29 is an acute-angled thin portion. According to this structure, the degree of freedom in designing the instrument panel is great.
【００２６】また、図９は前記図８に図示の構造におい
て、フランジ部３７，３７を凹溝部３５の底面略中央に
設けた例である。符号３４は表皮、３６は側壁、３８は
折り曲げ部、３９は鋭角状薄肉部である。FIG. 9 shows an example in which the flange portions 37, 37 are provided substantially in the center of the bottom surface of the concave groove portion 35 in the structure shown in FIG. Reference numeral 34 is a skin, 36 is a side wall, 38 is a bent portion, and 39 is an acute-angled thin portion.
【００２７】次に、図１０ないし図１７に従って、この
発明構造に係るエアバッグドア部の製法について説明す
る。ここに提案されるエアバッグドア部の製法は、鋭角
状薄肉部と平坦状一般部とが交互に形成された表皮を得
る工程と、前記表皮裏面側に合成樹脂発泡層を一体に形
成する工程とを含む。Next, the manufacturing method of the airbag door portion according to the structure of the present invention will be described with reference to FIGS. The manufacturing method of the airbag door portion proposed here is a step of obtaining a skin in which sharp-angled thin portions and flat general portions are alternately formed, and a step of integrally forming a synthetic resin foam layer on the back surface side of the skin. Including and
【００２８】まず表皮の形成工程について説明すると、
図１０に示すように、表皮の成形は、公知のパウダース
ラッシュ成形型４０によってなされる。このパウダース
ラッシュ成形型４０はバケット４１と成形型４３とから
なり、前記バケット４１のパウダー収容部４２には、軟
質ＰＶＣパウダーなどの熱可塑性合成樹脂パウダーから
なる表皮用樹脂材料５０が収容される。First, the skin forming process will be described.
As shown in FIG. 10, the skin is formed by a known powder slush mold 40. The powder slush molding die 40 is composed of a bucket 41 and a molding die 43, and a powder containing portion 42 of the bucket 41 contains a resin material 50 for the skin made of thermoplastic synthetic resin powder such as soft PVC powder.
【００２９】前記成形型４３の型面４４において、前記
破断予定部１４となるフランジ部１３を形成する部分に
は、ビード部３０が設けられている。このビード部３０
は表皮の裏面に、折り曲げられたフランジ部を形成する
ためのもので、前記破断予定部１４の形状に沿って突設
される。前記ビード部３０は、成形される表皮のフラン
ジ部を前記した所定の長さとするため、厚み０．８ない
し１．０ｍｍで高さ４ないし１０ｍｍに形成される。A bead portion 30 is provided on a portion of the molding surface 44 of the molding die 43 where the flange portion 13 to be the breakable portion 14 is formed. This bead part 30
Is for forming a bent flange portion on the back surface of the skin, and is provided so as to protrude along the shape of the portion 14 to be broken. The bead portion 30 has a thickness of 0.8 to 1.0 mm and a height of 4 to 10 mm so that the flange portion of the molded skin has the predetermined length.
【００３０】前記ビード部３０の先端には先を鋭角とし
た鋭角部３１と平坦な一般部３２とが交互に形成されて
いる。図１１に示されるように、鋭角部３１は、表皮の
フランジ部の折り曲げ部に鋭角状薄肉部を形成するため
のものである。また、一般部３２は表皮に平坦状一般部
を形成するためのもので、前記鋭角部３１より０．５か
ら１．０ｍｍ程度高さを下げてその先端面を平坦として
いる。なお、鋭角部３１と一般部３２は、前記した表皮
の鋭角状薄肉部１６と平坦状一般部１７との長さｗ１，
ｗ２間隔となるように配設される。At the tip of the bead portion 30, an acute angle portion 31 having a sharp tip and a flat general portion 32 are alternately formed. As shown in FIG. 11, the acute-angled portion 31 is for forming an acute-angled thin-walled portion at the bent portion of the flange portion of the skin. Further, the general portion 32 is for forming a flat general portion on the skin, and the height thereof is lowered from the acute angle portion 31 by about 0.5 to 1.0 mm to make the tip end surface flat. The acute angle portion 31 and the general portion 32 have a length w1 of the acute angle thin portion 16 and the flat general portion 17 of the above-mentioned skin.
It is arranged so as to have a w2 interval.
【００３１】そして、熱媒循環パイプ５５，５５，…に
加熱オイル等の熱媒を供給し、前記成形型４３を適当な
温度まで加熱する。バケット４１と前記成形型４３とを
クランプして矢印ａのように所定回数回転させると、図
１２に示すように、バケット４１内の表皮用樹脂材料５
０が成形型４３内に移動してその型面４４に接触する。
前記表皮用樹脂材料５０は前記型面４４の熱により溶融
し該型面４４に所定厚みで層状に付着して、表皮５１が
形成される。Then, a heat medium such as heating oil is supplied to the heat medium circulation pipes 55, 55, ... And the molding die 43 is heated to an appropriate temperature. When the bucket 41 and the molding die 43 are clamped and rotated a predetermined number of times as indicated by the arrow a, as shown in FIG.
0 moves into the mold 43 and contacts the mold surface 44.
The outer skin resin material 50 is melted by the heat of the mold surface 44 and adheres to the mold surface 44 in a layer having a predetermined thickness to form a skin 51.
【００３２】この表皮成形時において、図１３に示すよ
うに、型面４４のビード部３０に接触した前記表皮用樹
脂材料５０は、鋭角部３１では薄肉となり一般部３２で
は上面が平坦であるので、鋭角部３１よりも多く付着し
て厚肉となる。At the time of forming the skin, as shown in FIG. 13, the skin resin material 50 contacting the bead portion 30 of the mold surface 44 has a thin portion at the acute angle portion 31 and a flat upper surface at the general portion 32. , More than the acute-angled portion 31, and becomes thicker.
【００３３】しかる後、前記成形型４０を冷却して、型
面に付着した表皮用樹脂材料５０を固化させてから脱型
し表皮５１を得る。得られた表皮５１には、前記ビード
部３０により、その破断予定部に沿って裏面側に折り曲
げられたフランジ部５２、およびその先端に鋭角状薄肉
部５６および平坦状一般部５７が交互に設けられてい
る。Thereafter, the molding die 40 is cooled to solidify the resin material 50 for the skin adhered to the mold surface, and then the mold is removed to obtain the skin 51. On the obtained skin 51, the bead portion 30 is provided with the flange portion 52 bent to the back surface side along the portion to be broken, and the sharp thin portion 56 and the flat general portion 57 are alternately provided at the tip thereof. Has been.
【００３４】次いで、図１４および図１５に示したよう
に、前記表皮５１の裏面側に合成樹脂発泡層が一体に形
成される。すなわち、発泡成形型６０の下型６１の型面
６３に、フランジ部５２が形成されている表皮の裏面側
が型内側となるようにして前記表皮５１を配置する。こ
のとき、フランジ部５２，５２は互いに近接するように
配置することが好ましい。一方、前記発泡成形型６０の
上型６２の型面６４には、インストルメントパネル用芯
材５３およびエアバッグドア部用芯材５４が適宜手段で
保持されて配置される。Next, as shown in FIGS. 14 and 15, a synthetic resin foam layer is integrally formed on the back surface side of the outer skin 51. That is, the outer skin 51 is arranged on the mold surface 63 of the lower mold 61 of the foam molding die 60 such that the back surface side of the outer skin on which the flange portion 52 is formed is the inner side of the mold. At this time, it is preferable to arrange the flange portions 52, 52 so as to be close to each other. On the other hand, on the mold surface 64 of the upper mold 62 of the foam molding mold 60, the instrument panel core member 53 and the airbag door core member 54 are appropriately held and arranged.
【００３５】そして、前記下型６１に配置された表皮５
１の裏面側に、注入機６５よりポリウレタン原料などの
合成樹脂発泡原料６６が所定量注入された後、前記上型
６２を閉じて発泡成形を行なう。Then, the epidermis 5 placed on the lower mold 61.
A predetermined amount of synthetic resin foam raw material 66 such as polyurethane raw material is injected from the pouring machine 65 to the back surface of No. 1 and then the upper mold 62 is closed to perform foam molding.
【００３６】その際、図１６および図１７から理解され
るように、前記フランジ部５２，５２は合成樹脂発泡原
料６６の発泡圧により合接する。特に、鋭角状先端部
は、薄肉かつ鋭角となっているので発泡圧を受けて曲が
りやすく、フランジ部が強固に密着する。合成樹脂発泡
原料６６は発泡硬化して表皮５１裏面に一体に合成樹脂
発泡層６７を形成し、上面側（型内では下面側）にエア
バッグドア部Ｄを画定する破断予定部５６を備えた表皮
５１を有するインストルメントパネル６８が得られる。At this time, as understood from FIGS. 16 and 17, the flange portions 52, 52 are brought into contact with each other by the foaming pressure of the synthetic resin foaming raw material 66. In particular, since the acute-angled tip portion is thin and has an acute angle, it easily bends under the foaming pressure, and the flange portion firmly adheres. The synthetic resin foaming raw material 66 is foamed and hardened to integrally form a synthetic resin foaming layer 67 on the back surface of the skin 51, and a breaking portion 56 that defines the airbag door portion D is provided on the upper surface side (the lower surface side in the mold). An instrument panel 68 having a skin 51 is obtained.
【００３７】[0037]
【発明の効果】以上図示し説明したように、この発明の
エアバッグドア部の構造によれば、表皮の破断予定部に
は、表皮裏面側へ折り曲げられてなるフランジ部の先端
に交互に設けられた鋭角状薄肉部と平坦状一般部とを有
しているので、平時には必要な強度が付与され、しかも
エアバッグの膨張時には確実かつ速やかに破断される。
さらに、合接したフランジ部の先端に設けられているの
で、前記破断予定部はエアバッグドア部の表面側に現れ
ず、外観が良好となるだけでなく、太陽光線や温度など
による劣化、収縮で亀裂などを生じるのを防ぐことがで
きる。As shown and described above, according to the structure of the airbag door portion of the present invention, the breakage portion of the skin is alternately provided at the tip of the flange portion bent to the back surface side of the skin. Since it has the sharp-edged thin-walled portion and the flat-shaped general portion, the necessary strength is imparted in the flat state, and the airbag is surely and quickly broken when the airbag is inflated.
Further, since it is provided at the tip of the joined flange portion, the portion to be broken does not appear on the surface side of the airbag door portion, and not only does it have a good appearance, but also deterioration and shrinkage due to sunlight or temperature. It is possible to prevent the occurrence of cracks and the like.
【００３８】また、本発明の製法によれば、パウダース
ラッシュ成形型に鋭角部と一般部とを交互に有するビー
ド部を設けているので、鋭角状薄肉部と平坦状一般部と
が交互に設けられたフランジ部が裏面に一体に形成され
た表皮を簡単かつ確実に成形することができる。したが
って、前記表皮を用いれば、合成樹脂発泡層の上面にエ
アバッグドア部を簡単かつ容易にしかも確実に得ること
ができる。According to the manufacturing method of the present invention, the powder slush mold is provided with the bead portion having the acute angle portion and the general portion alternately. Therefore, the acute angle thin portion and the flat general portion are alternately provided. It is possible to easily and surely form a skin in which the formed flange portion is integrally formed on the back surface. Therefore, by using the outer skin, the airbag door portion can be easily, easily and surely obtained on the upper surface of the synthetic resin foam layer.
【図１】この発明構造の一実施例を示す自動車のインス
トルメントパネルの概略斜視図である。FIG. 1 is a schematic perspective view of an automobile instrument panel showing an embodiment of the structure of the present invention.
【図２】そのエアバッグ装置が取り付けられた部分の断
面図である。FIG. 2 is a cross-sectional view of a portion to which the airbag device is attached.
【図３】図２の矢印３部分の拡大断面図である。FIG. 3 is an enlarged sectional view of a portion indicated by an arrow 3 in FIG.
【図４】この発明構造のエアバッグドア部が開口した状
態を示す断面図である。FIG. 4 is a cross-sectional view showing a state in which the airbag door portion of the present invention structure is opened.
【図５】この発明構造のインストルメントパネルの表皮
フランジ部の合接部に沿って切断した拡大断面図であ
る。FIG. 5 is an enlarged cross-sectional view taken along a joint portion of a skin flange portion of the instrument panel having the structure of the present invention.
【図６】図５の６Ａ−６Ａ線および６Ｂ−６Ｂ線で切断
した断面図である。6 is a sectional view taken along line 6A-6A and line 6B-6B in FIG.
【図７】この発明構造に係る表皮を裏面側から見た要部
の斜視図である。FIG. 7 is a perspective view of a main part of the outer skin according to the structure of the present invention viewed from the back surface side.
【図８】この発明構造の表皮の他の例を示す要部の拡大
断面図である。FIG. 8 is an enlarged cross-sectional view of a main part showing another example of the skin of the present invention structure.
【図９】同じく表皮の他の例を示す拡大断面図である。FIG. 9 is an enlarged cross-sectional view showing another example of the epidermis.
【図１０】表皮の成形に用いられるパウダースラッシュ
成形型を示す断面図である。FIG. 10 is a cross-sectional view showing a powder slush molding die used for molding a skin.
【図１１】そのビード部を示す要部の斜視図である。FIG. 11 is a perspective view of a main portion showing the bead portion.
【図１２】前記パウダースラッシュ成形型によって表皮
を成形する状態を示す断面図である。FIG. 12 is a cross-sectional view showing a state where an outer skin is formed by the powder slush mold.
【図１３】ビード部における表皮成形状態を示す断面図
である。FIG. 13 is a cross-sectional view showing a skin forming state in a bead portion.
【図１４】表皮の裏面側に合成樹脂発泡材料を注入する
状態を示す断面図である。FIG. 14 is a cross-sectional view showing a state in which a synthetic resin foam material is injected into the back surface side of the skin.
【図１５】その発泡成形状態を示す断面図である。FIG. 15 is a sectional view showing the foam-molded state.
【図１６】発泡成形前における表皮フランジ部の状態を
示す断面図である。FIG. 16 is a cross-sectional view showing a state of a skin flange portion before foam molding.
【図１７】発泡成形時における表皮フランジ部の状態を
示す断面図である。FIG. 17 is a cross-sectional view showing a state of a skin flange portion during foam molding.
【図１８】従来のエアバッグドア部を有するインストル
メントパネルの構造を示す断面図である。FIG. 18 is a cross-sectional view showing the structure of a conventional instrument panel having an airbag door portion.
【図１９】図１８の矢印１９部分の拡大断面図である。FIG. 19 is an enlarged cross-sectional view of a portion indicated by arrow 19 in FIG.
【図２０】図１８に示したエアバッグドア部の展開状態
を示す断面図である。20 is a cross-sectional view showing a developed state of the airbag door portion shown in FIG.
１０ インストルメントパネル １１ 合成樹脂発泡層 １２ 表皮 １３ フランジ部 １４ 破断予定部 １５ 折り曲げ部 １６ 鋭角状薄肉部 １７ 平坦状一般部 ３０ ビード部 ３１ 鋭角部 ３２ 一般部 Ｄ エアバッグドア部 10 Instrument panel 11 Synthetic resin foam layer 12 epidermis 13 Flange 14 Planned break 15 Bent section 16 Sharp thin-walled part 17 Flat general part 30 bead 31 sharp corner 32 General Department D Airbag door
───────────────────────────────────────────────────── フロントページの続き (72)発明者 八木 丈夫 愛知県豊田市トヨタ町１番地トヨタ自動 車株式会社内 (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８−26061（ＪＰ，Ａ) 特開 平６−285876（ＪＰ，Ａ) 特開 平８−253087（ＪＰ，Ａ) 特開 平７−309188（ＪＰ，Ａ) 特開 平７−329681（ＪＰ，Ａ) 特開 平５−162599（ＪＰ，Ａ) 特開 平４−27634（ＪＰ，Ａ) 実開 平６−35057（ＪＰ，Ｕ) 特表 平６−504503（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B60R 21/20 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeo Yagi 1st Toyota-cho, Toyota-shi, Aichi Toyota Motor Co., Ltd. (72) Inventor Masahiko Yanagihara 1st Toyota-cho, Toyota-shi, Aichi Toyota Motor Co., Ltd. ( 56) References JP-A-8-26061 (JP, A) JP-A-6-285876 (JP, A) JP-A-8-253087 (JP, A) JP-A-7-309188 (JP, A) JP Flat 7-329681 (JP, A) JP 5-162599 (JP, A) JP 4-27634 (JP, A) Actual flat 6-35057 (JP, U) Special table 6-504503 (JP , A) (58) Fields investigated (Int.Cl. 7 , DB name) B60R 21/20
Claims (5)
を画定する破断予定部が形成された表皮を一体に有する
エアバッグドア部において、 前記表皮は前記破断予定部に沿ってその裏面側に折り曲
げられたフランジ部の合接部を有するとともに、前記フ
ランジ部の合接部先端の折り曲げ部に鋭角状薄肉部が平
坦状一般部と交互に形成されていることを特徴とする自
動車のエアバッグドア部の構造。1. An airbag door part integrally having an outer skin on which a rupturable part defining an airbag door part is formed on an upper surface of a synthetic resin foam layer, wherein the outer lining is on the back surface side along the rupturable part. An air bag for an automobile, which has a joint portion of a bent flange portion, and an acute-angled thin portion is alternately formed with a flat general portion at the bent portion at the tip of the joint portion of the flange portion. Door structure.
げられたフランジ部の合接部の長さが４ないし１０ｍｍ
で、前記折り曲げ部の鋭角状薄肉部の肉厚が０．１ｍｍ
以下でかつ平坦状一般部の肉厚が０．２ないし０．４ｍ
ｍである自動車のエアバッグドア部の構造。2. The length of the joint portion of the flange portion bent to the back surface side is 4 to 10 mm according to claim 1.
And, the thickness of the acute-angled thin portion of the bent portion is 0.1 mm.
Below, and the thickness of the flat general part is 0.2 to 0.4 m
The structure of the air bag door part of the car which is m.
された鋭角状薄肉部の長さが３ないし５ｍｍで、平坦な
一般部の長さが１０ないし２０ｍｍである自動車のエア
バッグドア部の構造。3. The airbag part of an automobile according to claim 1, wherein the alternately formed acute-angled thin-walled portions have a length of 3 to 5 mm, and the flat general portion has a length of 10 to 20 mm. Construction.
前記鋭角状薄肉部および平坦な一般部の幅折り曲げ部の
交互形成部分が最初に破断される破断予定部にのみ形成
され、他の破断予定部は平坦状一般部によって形成され
た自動車のエアバッグドア部の構造。4. The method according to any one of claims 1 to 3,
The air bag of the automobile in which the alternate-formed portion of the width-bent portion of the acute-angled thin portion and the flat general portion is formed only in the breakable portion to be broken first, and the other breakable portions are formed by the flat general portion. Door structure.
破断予定部に、厚み０．８ないし１．０ｍｍで高さ４な
いし１０ｍｍのビード部を突設するとともに、前記ビー
ド部先端を鋭角状にした鋭角部と平坦な一般部とを交互
に形成し、これに表皮用樹脂材料を導入して、破断予定
部に沿ってその裏面側に折り曲げられたフランジ部と前
記フランジ部先端の折り曲げ部に鋭角状薄肉部と平坦状
一般部が交互に形成された表皮を得る工程と、 前記工程で得られた表皮裏面側に合成樹脂発泡材料を注
入し合成樹脂発泡層を形成して、破断予定部に沿ってそ
の裏面側に折り曲げられたフランジ部の合接部を有する
とともに、前記フランジ部の合接部先端の折り曲げ部に
鋭角状薄肉部が平坦状一般部と交互に形成された表皮を
有するエアバッグドア部を得る工程とを含むことを特徴
とする自動車のエアバッグドア部の製法。5. A bead portion having a thickness of 0.8 to 1.0 mm and a height of 4 to 10 mm is projectingly provided on a portion of the powder slush mold of the skin to be broken, and the tip of the bead portion is formed into an acute angle. An acute angle portion and a flat general portion are alternately formed, and a resin material for the skin is introduced into this, and a sharp angle is formed in the bent portion of the flange portion and the tip of the flange portion that is bent to the back surface side along the portion to be broken. A step of obtaining a skin in which flat thin parts and flat general parts are alternately formed, and a synthetic resin foam material is formed by injecting a synthetic resin foam material on the back surface side of the skin obtained in the above step, and a portion to be broken is planned. Along with a joint portion of the flange portion that is bent to the back surface side thereof, an air having a skin in which an acute-angled thin portion is alternately formed with a flat general portion at the bent portion at the tip of the joint portion of the flange portion. The bag door That process and preparation of the air bag door portion of an automobile, which comprises a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12962495A JP3386926B2 (en) | 1995-04-28 | 1995-04-28 | Structure of airbag door of automobile and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12962495A JP3386926B2 (en) | 1995-04-28 | 1995-04-28 | Structure of airbag door of automobile and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08301053A JPH08301053A (en) | 1996-11-19 |
| JP3386926B2 true JP3386926B2 (en) | 2003-03-17 |
Family
ID=15014090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12962495A Expired - Fee Related JP3386926B2 (en) | 1995-04-28 | 1995-04-28 | Structure of airbag door of automobile and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3386926B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19653797A1 (en) * | 1996-12-21 | 1998-06-25 | Mst Automotive Gmbh | Cover for an airbag module |
| EP0893224B1 (en) * | 1997-07-24 | 2004-12-29 | Benecke-Kaliko Aktiengesellschaft | Slush moulding of airbag cover with a tear line |
-
1995
- 1995-04-28 JP JP12962495A patent/JP3386926B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08301053A (en) | 1996-11-19 |
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