JP2948849B2 - Gas bag cover - Google Patents
Gas bag coverInfo
- Publication number
- JP2948849B2 JP2948849B2 JP2029342A JP2934290A JP2948849B2 JP 2948849 B2 JP2948849 B2 JP 2948849B2 JP 2029342 A JP2029342 A JP 2029342A JP 2934290 A JP2934290 A JP 2934290A JP 2948849 B2 JP2948849 B2 JP 2948849B2
- Authority
- JP
- Japan
- Prior art keywords
- gas bag
- cover
- skin material
- cover body
- reinforcing
- 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
- 230000003014 reinforcing effect Effects 0.000 claims description 54
- 239000000463 material Substances 0.000 claims description 40
- 229920003002 synthetic resin Polymers 0.000 claims description 10
- 239000000057 synthetic resin Substances 0.000 claims description 10
- 238000000465 moulding Methods 0.000 description 6
- 230000002787 reinforcement Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000015541 sensory perception of touch Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
- B60R21/2165—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member characterised by a tear line for defining a deployment opening
- B60R2021/21652—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member characterised by a tear line for defining a deployment opening the tearing being done or assisted by cutters
Landscapes
- Air Bags (AREA)
- Laminated Bodies (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、自動車等において、乗員を衝突等の衝撃か
ら保護するガスバッグのカバー体に関する。Description: TECHNICAL FIELD The present invention relates to a cover body of a gas bag for protecting an occupant from an impact such as a collision in an automobile or the like.
（従来の技術） 自動車において、乗員を衝突等の衝撃から保護するガ
スバッグ装置が知られている。(Prior Art) In an automobile, a gas bag device for protecting an occupant from an impact such as a collision is known.
このガスバッグ装置は、たとえば実開昭63−201862号
公報に示されているように、ステアリングホイールの中
央のボス部において、通常時は、折畳まれた状態のガス
バッグ（袋体）を軟質合成樹脂から成るカバー体（ケー
シング）で覆っておき、衝突等の際には、衝撃により、
ガス発生器（インフレータ）からガスを発生させ、この
ガスをガスバッグに流入させて膨張させ、この膨張の途
中で、ガスバッグの圧力により、カバー体を破断させる
ことによって、ガスバッグをカバー体から突出させ、こ
のガスバッグの突出によって、乗員がステアリングホイ
ールのリム部や前方のガラス等に衝突するのを防止する
とともに、衝撃を吸収する働きをするものである。In this gas bag device, as shown in, for example, Japanese Utility Model Application Laid-Open No. 63-201862, a normally folded gas bag (bag) is usually used at the center boss of a steering wheel. It is covered with a cover made of synthetic resin (casing).
A gas is generated from a gas generator (inflator), and the gas flows into a gas bag to be inflated. During the inflation, the cover is broken by the pressure of the gas bag, whereby the gas bag is removed from the cover. The projection of the gas bag prevents the occupant from colliding with the rim portion of the steering wheel, the front glass, and the like, and functions to absorb the impact.
そして、上記カバー体（ケーシング）には溝をＨ字状
に設けることにより、ガスバッグの膨張によって破断さ
れる薄肉部から成るＨ字状の破断ラインを形成し、この
Ｈ字状の破断ラインのうち中央部を通る左右方向の破断
ラインの上下両側部をガスバッグの膨張によって扉状に
開くようにしてある。By providing an H-shaped groove in the cover body (casing), an H-shaped break line composed of a thin portion that is broken by inflation of the gas bag is formed. The upper and lower sides of the left and right breaking lines passing through the center are opened like doors by inflating the gas bag.
しかしながら、このような構造では、カバー体（ケー
シング）の肉厚の５〜10mmに対して薄肉部の肉厚を0.5
〜2mm程度にするため、折畳まれて圧縮されたガスバッ
グ（袋体）からカバー体が圧力を受けることにより、通
常時に、カバー体の破断ライン部分が溝による薄肉部を
中心に盛上がるという問題があり、とくに、中央部を通
る左右方向の破断ラインに沿った盛上がりが強く現われ
るため、視覚的に見苦しく、触覚的にも違和感を与える
という問題もあり、これをごまかすために、意匠的な処
理等を行なう必要があった。However, in such a structure, the thickness of the thin portion is set to 0.5 to 5 to 10 mm of the thickness of the cover body (casing).
Due to the pressure applied to the cover from the folded and compressed gas bag (up to about 2 mm), the break line portion of the cover usually rises up around the thin part due to the groove at normal times. In particular, there is a strong bulge along the horizontal breaking line passing through the central part, which is visually unsightly and has a problem of giving a tactile sense of incongruity. And so on.
また、たとえば特開昭63−182115号公報に示されてい
るように、このようなカバー体（パッド）では、中央部
を通る左右方向の破断ラインの両側部にネット等のシー
ト状の補強体を埋設しておき、カバー体の破断時に、破
断ライン以外の部分に破断が生じるのを防止するととも
に、カバー体が細かく破断されて飛散するのを防止して
いる。Further, as shown in, for example, JP-A-63-182115, in such a cover (pad), a sheet-like reinforcing member such as a net is provided on both sides of a horizontal breaking line passing through a central portion. Is buried to prevent breakage of portions other than the breaking line when the cover body is broken, and to prevent the cover body from being finely broken and flying.
そして、このネット等のシート状の補強体の埋設に当
たっては、カバー体（パッド）を成形する金型の内面に
突設した複数の突起に補強体の遊端部を引掛けることに
より、補強体を所定の位置に張設しておき、この状態
で、金型に軟質合成樹脂を注入してカバー体（パッド）
を成形するようにしている。When embedding the sheet-like reinforcing member such as a net, the free ends of the reinforcing member are hooked on a plurality of protrusions protruding from the inner surface of a mold for forming a cover body (pad). Is stretched at a predetermined position, and in this state, a soft synthetic resin is injected into a mold to cover the pad (pad).
Is to be molded.
しかしながら、このようなネット等のシート状の補強
体は、可撓性及び柔軟性を有するため、その遊端部を複
数の突起に引掛けて所定の位置に張設する作業が面倒
で、補強体の位置がずれたり弛んだりし易く、樹脂の注
入時に突起から補強体が外れることもあるため、ネット
等のシート状の補強体がカバー体の表面に露出すること
があり、破断ライン以外の部分が破断する心配もある。However, since such a sheet-like reinforcing member such as a net has flexibility and flexibility, it is troublesome to hook the free end of the reinforcing member at a plurality of protrusions and to stretch it at a predetermined position. Since the position of the body is easily shifted or loosened, and the reinforcing body may come off from the projections when the resin is injected, the sheet-like reinforcing body such as a net may be exposed on the surface of the cover body. There is a concern that the part may break.
（発明が解決しようとする課題） 上述したように、従来のガスバッグのカバー体では、
折畳まれて圧縮されたガスバッグからカバー体が圧力を
受けることにより、通常時に、カバー体の破断ライン部
分が溝による薄肉部を中心に盛上がるという問題があ
る。(Problems to be Solved by the Invention) As described above, in the conventional gas bag cover body,
When the cover is subjected to pressure from the folded and compressed gas bag, there is a problem that the break line portion of the cover rises around a thin portion formed by the groove in a normal state.
また、従来のガスバッグのカバー体では、その成形に
際して、金型の複数の突起にシート状の補強体の遊端部
を引掛けて所定の位置に張設する作業が面倒で、補強体
の位置がずれたり弛んだりし易く、樹脂の注入時に突起
から補強体が外れることもあるため、ネット等のシート
状の補強体がカバー体の表面に露出することがあり、破
断ライン以外の部分が破断する心配もある。Further, in the conventional gas bag cover body, when molding, it is troublesome to hook the free ends of the sheet-shaped reinforcing member to a plurality of projections of the mold and stretch the sheet-shaped reinforcing member at a predetermined position. It is easy to shift or loosen the position, and the reinforcing body may come off from the projections when the resin is injected.Therefore, the sheet-like reinforcing body such as a net may be exposed on the surface of the cover body, and parts other than the breaking line may be exposed. There is also a fear of breaking.
本発明は、このような点に鑑みなされたもので、ガス
バッグのカバー体に破断ラインに沿った強い盛上がりが
現われるのを阻止すること、及び、補強体を確実に所定
の位置に埋設することを目的とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is intended to prevent a strong bulge along a break line from appearing on a cover body of a gas bag, and to bury a reinforcing body at a predetermined position without fail. It is intended for.
（課題を解決するための手段） 請求項１記載のガスバッグのカバー体は、ガスの流入
により展開して膨張するように折畳まれたガスバッグを
覆う覆部と、この覆部に形成され上記ガスバッグの膨張
により破断される破断ラインとを備えたカバー体であっ
て、上記覆部は、軟質合成樹脂の表皮材と、この表皮材
に上記破断ラインに沿って埋設された破断枠とを備え、
この破断枠は、上記表皮材が剥離可能に密着した剥離面
を備え、この剥離面は、上記覆部の肉厚方向に沿って形
成され、この破断枠の表面側の端縁部と上記カバー体の
表面との間が、上記覆部の他の部分より表皮材の肉厚の
薄い薄肉部となるものである。(Means for Solving the Problems) The cover body of the gas bag according to claim 1 is formed with a cover portion that covers the gas bag that is folded so as to be expanded and inflated by the inflow of gas, and the cover portion. A cover body having a rupture line that is ruptured by inflation of the gas bag, wherein the cover portion is made of a soft synthetic resin skin material, and a rupture frame embedded in the skin material along the rupture line. With
The breaking frame has a peeling surface on which the skin material is peelably adhered, and the peeling surface is formed along the thickness direction of the cover portion. A portion between the surface of the body and a thin portion of the skin material is thinner than the other portion of the cover portion.
請求項２記載のガスバッグのカバー体は、請求項１記
載のガスバッグのカバー体において、破断枠は、少なく
とも一部が表皮材の裏面側に露出するものである。According to a second aspect of the present invention, in the cover body of the gas bag according to the first aspect, at least a part of the fracture frame is exposed on the back surface side of the skin material.
請求項３記載のガスバッグのカバー体は、請求項１ま
たは２記載のガスバッグのカバー体において、カバー体
の破断ライン以外の部分を補強する補強体を破断枠に連
続して設け、この補強体を表皮材に埋設したものであ
る。According to a third aspect of the present invention, there is provided a cover for a gas bag according to the first or second aspect, wherein a reinforcing member for reinforcing a portion other than a breaking line of the cover is provided continuously to the breaking frame, and the reinforcing member is provided. The body is buried in the skin material.
（作用） 請求項１記載のガスバッグのカバー体では、カバー体
の覆部の破断ラインを、表皮材の肉厚の薄い薄肉部と、
この表皮材に埋設された破断枠とにより形成したので、
覆部の肉厚を破断ラインに沿って薄く形成する必要がな
く、通常時に、折畳まれて圧縮されているガスバッグか
らカバー体が圧力を受けても、破断ラインが変形しにく
くなり、外観が向上する。また、ガスバッグの膨脹時に
は、覆部の肉厚方向に沿って圧力が加わり、覆部の肉厚
方向に沿って形成された破断枠の剥離面が表皮材から剥
離するとともに、表皮材の薄肉部が破断することによっ
て、カバー体が確実に破断ラインに沿って破断する。(Operation) In the cover body of the gas bag according to the first aspect, the breaking line of the cover portion of the cover body is defined by a thin portion of the skin material having a thin thickness.
Since it was formed by the rupture frame embedded in this skin material,
It is not necessary to make the thickness of the cover part thin along the breaking line, and even if the cover body receives pressure from the folded and compressed gas bag during normal times, the breaking line is less likely to deform, Is improved. In addition, when the gas bag is inflated, pressure is applied along the thickness direction of the covering portion, and the peeling surface of the fracture frame formed along the thickness direction of the covering portion is peeled off from the skin material, and the thickness of the skin material is reduced. When the portion breaks, the cover body reliably breaks along the break line.
請求項２記載のガスバッグのカバー体では、請求項１
記載の作用に加え、破断枠は、少なくとも一部が表皮材
の裏面側に露出するので、成形用の金型内で所定の位置
に容易に固定される。In the cover body of the gas bag according to the second aspect, the first aspect.
In addition to the operation described above, at least a part of the fracture frame is exposed on the back surface side of the skin material, so that the fracture frame is easily fixed at a predetermined position in the molding die.
請求項３記載のガスバッグのカバー体では、請求項１
または２記載の作用に加え、カバー体の破断ライン以外
の部分を補強する補強体を破断枠に連続して設け、この
補強体を表皮材に埋設したので、成形用の金型内で補強
体は破断枠を介して所定の位置に固定されるので、補強
体がカバー体の表面に露出することがなく、ガスバッグ
の膨脹時に破断ライン以外の部分が破断する心配もな
い。In the cover body of the gas bag according to the third aspect, the first aspect.
Or In addition to the operation described in 2, the reinforcing body for reinforcing the portion other than the breaking line of the cover body is provided continuously to the breaking frame, and the reinforcing body is embedded in the skin material. Is fixed at a predetermined position via the rupture frame, so that the reinforcing member is not exposed on the surface of the cover body, and there is no fear that a portion other than the rupture line is broken when the gas bag is inflated.
（実施例） 本発明のガスバッグのカバー体の実施例を図面を参照
して説明する。(Example) An example of the cover body of the gas bag of the present invention will be described with reference to the drawings.
第５図は自動車のステアリングホイールを示し、この
ステアリングホイールは、円環状のリム部１の中央部に
複数のスポーク部２を介してボス部３を設けたもので、
ボス部３は、第１図に示すように、図示しない自動車の
ステアリングシャフトに嵌着して固定される金属製の円
筒状のボス４を有し、このボス４の上部に金属製のボス
プレート５が溶接によって固着されている。FIG. 5 shows a steering wheel of an automobile. This steering wheel is provided with a boss portion 3 via a plurality of spoke portions 2 at a central portion of an annular rim portion 1.
As shown in FIG. 1, the boss portion 3 has a metal cylindrical boss 4 fitted and fixed to a steering shaft of an automobile (not shown), and a metal boss plate is provided above the boss 4. 5 is fixed by welding.
そして、上記ボス部３の上部にはガスバッグ装置10が
配設されている。このガスバッグ装置10では、上記ボス
プレート５の上に図示しない取付手段を介してベースプ
レート11を取付け、このベースプレート11の円形の開口
部12の周辺部の上にガスバッグ13の円形の開口部14の周
辺部を円環状の固定板15及び複数のリベット、ねじなど
の固定具16によって固定してある。A gas bag device 10 is provided above the boss 3. In the gas bag device 10, a base plate 11 is mounted on the boss plate 5 via mounting means (not shown), and a circular opening 14 of a gas bag 13 is mounted on a peripheral portion of the circular opening 12 of the base plate 11. Is fixed by an annular fixing plate 15 and fixing tools 16 such as a plurality of rivets and screws.
また、このガスバッグ装置10では、上記ベースプレー
ト11の開口部12にガス発生器20を配設し、このガス発生
器20の外周のフランジ部21を上記ベースプレート11の開
口部12の周辺部の下に上記固定具16によって固定してあ
る。Further, in this gas bag device 10, a gas generator 20 is disposed in the opening 12 of the base plate 11, and the flange 21 on the outer periphery of the gas generator 20 is located below the peripheral portion of the opening 12 of the base plate 11. Is fixed by the fixture 16.
なお、ガスバッグ13は折畳まれた状態で配設されてお
り、このガスバッグ13の内部に位置するガス発生器20の
上側部分にはガスを吹出する複数の吹出口22が設けられ
ている。The gas bag 13 is disposed in a folded state, and a plurality of outlets 22 for blowing out gas are provided in an upper portion of the gas generator 20 located inside the gas bag 13. .
さらに、このガスバッグ装置10では、上記ベースプレ
ート11の外周縁部に上記ガスバッグ13を覆うカバー体25
が固定されている。このカバー体25は、ベースプレート
11に固定された短い筒部26と、この筒部26の上部を閉塞
した覆部としての平板部27とを、たとえば発泡ウレタン
等の比較的に虚弱で弾性を有する軟質合成樹脂により一
体に成形したものである。Further, in the gas bag device 10, the cover 25 covers the gas bag 13 on the outer peripheral edge of the base plate 11.
Has been fixed. This cover body 25 is a base plate
A short cylindrical portion 26 fixed to 11 and a flat plate portion 27 as a cover closing the upper portion of the cylindrical portion 26 are integrally formed of a relatively weak and elastic soft synthetic resin such as urethane foam. It was done.
そして、このカバー体25には、上記発泡ウレタン等の
軟質合成樹脂を表皮材30として、上下一対の補強体とし
ての補強板31,32とこの補強板31,32の周囲に一体に形成
された破断枠33,34が埋設されている。In the cover body 25, a soft synthetic resin such as the urethane foam is used as a skin material 30, and reinforcing plates 31, 32 as a pair of upper and lower reinforcing members are integrally formed around the reinforcing plates 31, 32. Break frames 33 and 34 are buried.
この補強板31,32と破断枠33,34は、第２図に示すよう
に、比較的に強靭で抗張力の高いポリプロピレンやナイ
ロン等の合成樹脂で一体成形され、補強板31,32には表
皮材30の軟質合成樹脂が入込む通孔35が多数形成され、
破断枠33,34は、カバー体25の平板部27にガスバッグ13
の膨張によって破断される第５図に示すＨ字状の破断ラ
イン36を構成するように、補強板31,32の周囲に垂直状
のリブとして形成されている。As shown in FIG. 2, the reinforcing plates 31 and 32 and the fracture frames 33 and 34 are integrally formed of a relatively tough and high tensile strength synthetic resin such as polypropylene or nylon. A large number of through holes 35 into which the soft synthetic resin of the material 30 enters are formed,
The break frames 33 and 34 are attached to the flat plate portion 27 of the cover body 25 by the gas bag 13.
5 are formed as vertical ribs around the reinforcing plates 31 and 32 so as to form an H-shaped breaking line 36 shown in FIG.
そして、破断枠33,34は、補強板31,32の周囲に垂直状
のリブとして形成されているので、第３図に示すよう
に、その端縁部とカバー体25の表面の間に表皮材30の薄
肉部37を形成し、その外面は表皮材30の軟質合成樹脂に
対する剥離面38となっている。Since the fracture frames 33 and 34 are formed as vertical ribs around the reinforcing plates 31 and 32, a skin is provided between the edge and the surface of the cover body 25 as shown in FIG. A thin portion 37 of the material 30 is formed, and an outer surface thereof is a release surface 38 of the skin material 30 from the soft synthetic resin.
ここで、破断枠33,34の剥離面38は、破断枠33,34及び
補強板31,32全体を表皮材30に対する接着力が少ないも
ので形成したり、破断枠33,34及び補強板31,32全体ない
しは剥離面38だけにふっ素その他の離型剤をコーティン
グして表皮材30に対する接着力を無くすことで形成する
ことができる。Here, the peeling surfaces 38 of the fracture frames 33, 34 are formed by forming the entire fracture frames 33, 34 and the reinforcing plates 31, 32 with a small adhesive force to the skin material 30, or by forming the fracture frames 33, 34 and the reinforcing plates 31. , 32 or only the release surface 38 is coated with fluorine or other release agent to eliminate the adhesive force to the skin material 30.
なお、上下一対の破断枠33,34のうちの一方、ここで
は下側の破断枠34においては、上側の破断枠33に対向す
る水平部分34aの高さを低くし、これによって、この破
断枠34の水平部分34aの上部の表皮材30はとくに薄肉部3
7となっておらず、対向した上側の破断枠33の水平部分3
3aだけで表皮材30の薄肉部37を形成してあり、これとと
もに、この下側の破断枠34の水平部分34aの外面はとく
に剥離面38とする必要はない。In addition, in one of the pair of upper and lower breaking frames 33, 34, here, in the lower breaking frame 34, the height of the horizontal portion 34a facing the upper breaking frame 33 is reduced, whereby The skin material 30 above the horizontal portion 34a of the 34 is particularly thin
The horizontal part 3 of the upper breaking frame 33 that is not facing 7
The thin portion 37 of the skin material 30 is formed only by 3a, and the outer surface of the horizontal portion 34a of the lower breaking frame 34 does not need to be the peeling surface 38 in particular.
このような構成により、自動車の衝突事故等によっ
て、図示しない衝撃感知センサが作動して、ガス発生器
20からガスバッグ13の内部にガスを急激に放出し、この
ガスにより、ガスバッグ13が急速に展開して膨張し、こ
の膨張途中に、その膨張圧力によって第４図に示すよう
に、カバー体25の破断枠33,34の剥離面38と表皮材30が
剥離し、最終的に、この剥離面38の上側の薄肉部37が破
断し、これによって、カバー体25が破断ライン36に沿っ
て破断し、Ｈ字状の破断ライン36のうちの中央部の左右
方向の水平部分36aの上下両側部が扉状に開き、ガスバ
ッグ13がカバー体25から突出して運転者に向かって展開
し、この展開したガスバッグ13によって、運転者がステ
アリングホイールのリム部１や前方のガラスに衝突する
のを防止するとともに、衝突の際の衝撃を吸収する。With such a configuration, an impact sensor (not shown) is activated in the event of an automobile collision or the like, and the gas generator is activated.
The gas is rapidly released from the gas bag 20 into the gas bag 13, and the gas rapidly expands and inflates the gas bag 13. During this inflation, the cover body is inflated by the inflation pressure as shown in FIG. The peeling surface 38 of the 25 fracture frames 33 and 34 and the skin material 30 are peeled off, and finally, the thin portion 37 on the upper side of the peeling surface 38 is broken, whereby the cover body 25 is moved along the breaking line 36. The upper and lower sides of the horizontal portion 36a in the horizontal direction at the center of the H-shaped breaking line 36 open like a door, and the gas bag 13 protrudes from the cover body 25 and deploys toward the driver, The deployed gas bag 13 prevents the driver from colliding with the rim portion 1 of the steering wheel and the front glass, and absorbs the impact at the time of the collision.
そして、このガスバッグ13の展開の際、補強板31,32
がカバー体25の破断ライン36以外の部分に埋設されてい
るため、破断ライン36以外の箇所に破断が生じるのを確
実に防止でき、破断時における破片の飛散をも確実に防
止することができる。When the gas bag 13 is deployed, the reinforcing plates 31, 32
Is buried in a portion other than the rupture line 36 of the cover body 25, so that it is possible to reliably prevent the rupture from occurring in a portion other than the rupture line 36, and also to surely prevent the fragments from scattering at the time of the rupture. .
また、通常の状態では、カバー体25は、折畳まれて圧
縮されているガスバッグ13からの圧力を受けるが、ここ
では、従来の溝に相当する部分を破断枠33,34が隙間な
く埋めている構造となっていて、この破断枠33,34が潰
れ難いため、破断ライン36が盛上がることがない。In a normal state, the cover body 25 receives pressure from the gas bag 13 which is folded and compressed, but here, the portions corresponding to the conventional grooves are filled without gaps by the fracture frames 33 and 34. Since the fracture frames 33 and 34 are not easily crushed, the fracture line 36 does not rise.
そして、このカバー体25の製造に際しては、予め一体
成形しておいた補強板31,32及び破断枠33,34を表皮材30
を成形する金型内に装着し、この金型内に表皮材30の軟
質合成樹脂を注入するが、金型内で破断枠33,34を介し
て補強板31,32を所定の位置に固定できるので、金型内
で補強板31,32の位置がずれたりすることがなく、した
がって、補強板31,32を表皮材30の所定位置に確実に埋
設することができるので、補強板31,32がカバー体25の
表面に露出することがなく、ガスバッグ13の膨脹時に破
断ライン36以外の部分が破断する心配もない。When the cover body 25 is manufactured, the reinforcing plates 31 and 32 and the break frames 33 and
Is mounted in a mold for molding, and the soft synthetic resin of the skin material 30 is injected into the mold, but the reinforcing plates 31, 32 are fixed at predetermined positions in the mold via the fracture frames 33, 34. Since the positions of the reinforcing plates 31 and 32 do not shift in the mold, the reinforcing plates 31 and 32 can be securely embedded at predetermined positions of the skin material 30. 32 is not exposed on the surface of the cover body 25, and there is no fear that the portion other than the breaking line 36 is broken when the gas bag 13 is inflated.
なお、この実施例では、補強体として補強板31,32を
用い、この補強板31,32を破断枠33,34と一体に形成した
が、第６図に示すように、補強体としてシート状の補強
ネット41,42を用い、この補強ネット41,42を破断枠33,3
4に複数のリベット43等の連結部材で取付けるようにし
ても、同様の効果を奏する。In this embodiment, the reinforcing plates 31 and 32 were used as the reinforcing members, and the reinforcing plates 31 and 32 were formed integrally with the fracture frames 33 and 34. However, as shown in FIG. Using the reinforcing nets 41 and 42, the reinforcing nets 41 and 42 are
The same effect can be obtained even if the mounting member 4 is attached to the connecting member such as a plurality of rivets 43.
そして、とくに、柔軟性がある補強ネット41,42を用
いる場合にも、この補強ネット41,42を事前に破断枠33,
34に確実に取付けて所定の状態に張設しておくことがで
きるので、表皮材30を成形する金型内で破断枠33,34を
介して補強ネット41,42を所定の位置に固定でき、この
ため、金型内で補強ネット41,42の位置がずれたり弛ん
だりすることがなく、樹脂の注入時に破断枠33,34から
補強ネット41,42が外れる心配もないため、補強ネット4
1,42を表皮材30の所定位置に確実に埋設することがで
き、したがって、補強ネット41,42がカバー体の表面に
露出することがなく、ガスバッグ13の膨脹時に破断ライ
ン36以外の部分が破断する心配もない。And especially, when using the flexible reinforcement nets 41 and 42, these reinforcement nets 41 and 42 are
34, the reinforcing nets 41, 42 can be fixed at predetermined positions via the fracture frames 33, 34 in the mold for forming the skin material 30, since the reinforcing nets 41, 42 can be fixed at predetermined positions. Therefore, the positions of the reinforcing nets 41 and 42 do not shift or become loose in the mold, and there is no fear that the reinforcing nets 41 and 42 come off from the fracture frames 33 and 34 during resin injection.
1, 42 can be reliably embedded in the predetermined position of the skin material 30, so that the reinforcing nets 41, 42 are not exposed on the surface of the cover body, and when the gas bag 13 is inflated, portions other than the break line 36 are inflated. There is no fear of breaking.
なお、表皮材30を成形する金型内で破断枠33,34を所
定の位置に固定する方法としては、第７図に示すよう
に、上下一対の破断枠33,34の複数箇所を連結部51で連
結し、この複数の連結部51及び必要に応じて破断枠33,3
4の他の部分にそれぞれ係止突起52を形成し、この係止
突起52を金型53の所定位置に形成した係止孔54に係止し
たり、第８図に示すように、上下一対の破断枠33,34の
複数箇所を連結した連結部51及び必要に応じて破断枠3
3,34の他の部分にそれぞれ係止孔55を形成し、この係止
孔55を金型53の所定位置に形成した係止突起56に係止し
たりする方法がある。As a method of fixing the fracture frames 33, 34 at predetermined positions in the mold for molding the skin material 30, as shown in FIG. 51, and the plurality of connecting portions 51 and, if necessary, the fracture frames 33, 3
4, a locking projection 52 is formed on each of the other portions, and the locking projection 52 is locked in a locking hole 54 formed at a predetermined position of the mold 53, or as shown in FIG. Connection part 51 connecting a plurality of locations of the fracture frames 33 and 34, and, if necessary, the fracture frame 3
There is a method in which a locking hole 55 is formed in each of the other portions of the molds 3 and 34, and the locking hole 55 is locked to a locking projection 56 formed at a predetermined position of the mold 53.
なお、上述した実施例は、ステアリングホイールのボ
ス部３にガスバッグ装置10を設けた例であるが、インス
トルメントパネルにガスバッグ装置を設けるものに適用
することもできる。Although the above-described embodiment is an example in which the gas bag device 10 is provided on the boss 3 of the steering wheel, the present invention can also be applied to a device in which the gas bag device is provided on the instrument panel.
（発明の効果） 請求項１記載のガスバッグのカバー体によれば、カバ
ー体の覆部の破断ラインを、表皮材の肉厚の薄い薄肉部
と、この表皮材に埋設された破断枠とにより形成したた
め、覆部の肉厚を破断ラインに沿って薄く形成する必要
がなく、通常時に、折畳まれて圧縮されているガスバッ
グからカバー体が圧力を受けても、破断ラインが変形し
にくくなり、外観を向上できる。また、ガスバッグの膨
脹時には、覆部の肉厚方向に沿って圧力が加わり、覆部
の肉厚方向に沿って形成された破断枠の剥離面が表皮材
から剥離するとともに、表皮材の薄肉部が破断すること
によって、カバー体を確実に破断ラインに沿って破断で
きる。(Effects of the Invention) According to the cover body of the gas bag according to the first aspect, the breaking line of the covering portion of the cover body is formed by a thin portion having a thin thickness of the skin material and a breaking frame embedded in the skin material. It is not necessary to make the thickness of the cover part thin along the breaking line, and the breaking line is deformed even if the cover body receives pressure from the folded and compressed gas bag during normal times. And the appearance can be improved. Further, when the gas bag is inflated, pressure is applied along the thickness direction of the cover portion, and the peeling surface of the fracture frame formed along the thickness direction of the cover portion peels off from the skin material, and the skin material has a thin thickness. By breaking the portion, the cover body can be reliably broken along the breaking line.
請求項２記載のガスバッグのカバー体によれば、請求
項１記載の効果に加え、破断枠は、少なくとも一部が表
皮材の裏面側に露出するため、成形用の金型内で所定の
位置に容易に固定できる。According to the cover of the gas bag according to the second aspect, in addition to the effect of the first aspect, at least a part of the fracture frame is exposed on the back surface side of the skin material, so that a predetermined amount is provided within the molding die. Can be easily fixed in position.
請求項３記載のガスバッグのカバー体によれば、請求
項１または２記載の効果に加え、カバー体の破断ライン
以外の部分を補強する補強体を破断枠に連続して設け、
この補強体を表皮材に埋設したため、成形用の金型内で
補強体を破断枠を介して所定の位置に固定でき、とく
に、柔軟性があるネット等のシート状の補強体を用いる
場合にも、この補強体を事前に破断枠に確実に取付けて
おくことができるので、金型内で補強体の位置がずれた
り弛んだりすることがなく、樹脂の注入時に破断枠から
補強体が外れる心配もないため、補強体がカバー体の表
面に露出することがなく、ガスバッグの膨脹時に破断ラ
イン以外の部分が破断する心配もない。According to the cover body of the gas bag according to the third aspect, in addition to the effect of the first or second aspect, a reinforcing body that reinforces a portion other than the break line of the cover body is provided continuously to the fracture frame,
Since this reinforcing member is embedded in the skin material, the reinforcing member can be fixed at a predetermined position in the molding die via a break frame, particularly when a sheet-like reinforcing member such as a flexible net is used. Also, since the reinforcing body can be securely attached to the breaking frame in advance, the reinforcing body does not shift or loosen in the mold, and the reinforcing body comes off from the breaking frame when the resin is injected. Since there is no worry, the reinforcing body is not exposed on the surface of the cover body, and there is no fear that a portion other than the breaking line is broken when the gas bag is inflated.
第１図ないし第５図は本発明のガスバッグのカバー体の
一実施例を示し、第１図はステアリングホイールのガス
バッグ部分の断面図、第２図はそのカバー体の破断枠の
斜視図、第３図はそのカバー体の一部の断面図、第４図
は破断した状態のカバー体の一部の断面図、第５図はス
テアリングホイールの平面図であり、第６図は他の実施
例を示すカバー体の一部の断面図、第７図及び第８図は
それぞれ他の実施例を示す破断枠の斜視図である。 13……ガスバッグ、25……カバー体、27……覆部として
の平板部、30……表皮材、31,32……補強体としての補
強板、33,34……破断枠、36……破断ライン、37……薄
肉部、38……剥離面、41,42……補強体としての補強ネ
ット。1 to 5 show an embodiment of a cover body of a gas bag according to the present invention. FIG. 1 is a sectional view of a gas bag portion of a steering wheel, and FIG. 2 is a perspective view of a broken frame of the cover body. 3 is a cross-sectional view of a part of the cover body, FIG. 4 is a cross-sectional view of a part of the cover body in a broken state, FIG. 5 is a plan view of a steering wheel, and FIG. FIG. 7 and FIG. 8 are partial cross-sectional views of a cover body showing an embodiment, and FIG. 7 and FIG. 13 ... gas bag, 25 ... cover body, 27 ... flat plate as cover, 30 ... skin material, 31, 32 ... reinforcing plate as reinforcement, 33, 34 ... break frame, 36 ... ... break line, 37 ... thin part, 38 ... peeling surface, 41, 42 ... reinforcement net as reinforcement.
Claims (3)
折畳まれたガスバッグを覆う覆部と、この覆部に形成さ
れ上記ガスバッグの膨張により破断される破断ラインと
を備えたカバー体であって、 上記覆部は、軟質合成樹脂の表皮材と、この表皮材に上
記破断ラインに沿って埋設された破断枠とを備え、 この破断枠は、上記表皮材が剥離可能に密着した剥離面
を備え、 この剥離面は、上記覆部の肉厚方向に沿って形成され、 この破断枠の表面側の端縁部と上記カバー体の表面との
間が、上記覆部の他の部分より表皮材の肉厚の薄い薄肉
部となる ことを特徴とするガスバッグのカバー体。1. A cover comprising: a cover for covering a gas bag folded so as to be expanded and inflated by the inflow of gas; and a break line formed in the cover and broken by the inflation of the gas bag. The cover comprises a skin material of a soft synthetic resin, and a break frame embedded in the skin material along the break line, and the break frame is in close contact with the skin material so that the skin material can be peeled off. The peeling surface is formed along the thickness direction of the cover, and the gap between the surface side edge of the fracture frame and the surface of the cover body is other than the cover. A cover body for a gas bag, characterized in that the thickness of the skin material is thinner than that of the portion.
側に露出する ことを特徴とする請求項１記載のガスバッグのカバー
体。2. The gas bag cover according to claim 1, wherein at least a part of the fracture frame is exposed on the back side of the skin material.
る補強体を破断枠に連続して設け、この補強体を表皮材
に埋設したことを特徴とする請求項１または２記載のガ
スバッグのカバー体。3. The gas bag according to claim 1, wherein a reinforcing body for reinforcing a portion other than the breaking line of the cover body is provided continuously to the breaking frame, and the reinforcing body is embedded in a skin material. Cover body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2029342A JP2948849B2 (en) | 1990-02-08 | 1990-02-08 | Gas bag cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2029342A JP2948849B2 (en) | 1990-02-08 | 1990-02-08 | Gas bag cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03235738A JPH03235738A (en) | 1991-10-21 |
| JP2948849B2 true JP2948849B2 (en) | 1999-09-13 |
Family
ID=12273561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2029342A Expired - Fee Related JP2948849B2 (en) | 1990-02-08 | 1990-02-08 | Gas bag cover |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2948849B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101758636B1 (en) | 2015-12-14 | 2017-07-17 | 주식회사 우성플라텍 | Protection Cover for Carrying Gas Insulated Switchgear |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0450053A (en) * | 1990-06-18 | 1992-02-19 | Takata Kk | Module cover for air bag device |
| US5378014A (en) * | 1992-11-13 | 1995-01-03 | Davidson Textron Inc. | Dual door arrangement for air bag deployment |
| US5306040A (en) * | 1993-03-17 | 1994-04-26 | Morton International, Inc. | Cover for airbag |
| DE29605386U1 (en) * | 1996-03-22 | 1996-07-18 | Trw Occupant Restraint Systems Gmbh, 73551 Alfdorf | Vehicle steering wheel for fitting with an integrated gas bag restraint system |
| DE102004045757A1 (en) * | 2004-09-21 | 2006-04-06 | Trw Automotive Safety Systems Gmbh | Method for producing a vehicle interior trim part, and vehicle interior trim part |
| DE102008034383B4 (en) * | 2008-07-23 | 2018-04-12 | Autoliv Development Ab | Airbag cover and airbag module with an airbag cover |
| JP2013047049A (en) * | 2011-08-29 | 2013-03-07 | Sekisui Chem Co Ltd | Airbag storage structure for vehicle |
| CN206644778U (en) * | 2017-03-20 | 2017-11-17 | 魔玛智能科技（上海）有限公司 | Gas bag constructional device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8713154U1 (en) * | 1987-09-30 | 1987-11-12 | TRW Repa GmbH, 7077 Alfdorf | Covering a driver-side gas bag impact protection device in motor vehicles |
-
1990
- 1990-02-08 JP JP2029342A patent/JP2948849B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101758636B1 (en) | 2015-12-14 | 2017-07-17 | 주식회사 우성플라텍 | Protection Cover for Carrying Gas Insulated Switchgear |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03235738A (en) | 1991-10-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3201243B2 (en) | Automotive interior parts with lid for airbag | |
| US3640546A (en) | Safety apparatus | |
| US5810389A (en) | Side air bag device | |
| US3756617A (en) | Safety apparatus | |
| JPH1059107A (en) | Instrument panel with airbag door | |
| JPH05147489A (en) | Instrument panel provided with hidden air bag developing door | |
| JPH0885408A (en) | Vehicle door and frame of interior panel and manufacture thereof | |
| EP0710591B1 (en) | Seamless door for air bag module | |
| JP2948849B2 (en) | Gas bag cover | |
| US6045153A (en) | Instrument panel cover arrangement and method of making | |
| US5906390A (en) | Vehicle occupant protection apparatus | |
| RU2404073C1 (en) | Gas bag shroud | |
| JPH07300058A (en) | Hidden door assembly for air bag type restraint safety device | |
| US20040051280A1 (en) | Air bag door | |
| JPH04197849A (en) | Structure of automobile air bag expansion opening part and manufacture thereof | |
| JPH092180A (en) | Air bag cover | |
| JP2006096267A (en) | Cover of airbag apparatus | |
| JPS6144708B2 (en) | ||
| JPH04151348A (en) | Air bag stowage cover | |
| JP2000071926A (en) | Manufacture of interior member for on-vehicle air bag device | |
| JP3111855B2 (en) | Interior parts for airbag devices | |
| JP2509335B2 (en) | Airbag device | |
| JPH05170044A (en) | Air bag cover body | |
| JPH01109146A (en) | Structure for linking air bag cover to retainer | |
| JP3254973B2 (en) | Airbag cover |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |