JP2011245926A - Cover of airbag device - Google Patents

Cover of airbag device Download PDF

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JP2011245926A
JP2011245926A JP2010119287A JP2010119287A JP2011245926A JP 2011245926 A JP2011245926 A JP 2011245926A JP 2010119287 A JP2010119287 A JP 2010119287A JP 2010119287 A JP2010119287 A JP 2010119287A JP 2011245926 A JP2011245926 A JP 2011245926A
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cover
main body
tear line
door
line
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JP5606154B2 (en
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Takahiro Yamauchi
貴裕 山内
Umi Urata
海 浦田
Kenichiro Fujita
健一郎 藤田
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Nihon Plast Co Ltd
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Nihon Plast Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a cover of an airbag device for reducing the cost of development by designing a structure that hardly distorts on the surface of the cover.SOLUTION: The cover 5 for an airbag device 3 comprises a planar cover body 6 having a prescribed area and a side wall 7 for mounting, the wall drooping from the back face 6a of the cover body 6, in which a tear line 11 (8) formed along the side wall 7 for mounting can function as a door part 4 by breaking by expansion force of the airbag. The back face 4a of the cover body 6 functioning as the door part 4 has a shallow groove 9 formed therein that does not tear along the tear line 11 (8).

Description

本発明は、車両衝突時に、ステアリングホイールやインストルメントパネル等に乗員が二次衝突から保護するエアバッグ装置に用いるカバーに係るものであり、特にエアバッグの展開時にカバーがティアラインに沿って正確に破断するようにしたエアバッグ装置のカバーに関する。   The present invention relates to a cover used for an air bag apparatus that protects a steering wheel, an instrument panel, and the like from a secondary collision in the event of a vehicle collision. The present invention relates to a cover for an air bag device that is torn.

従来のエアバッグ装置のカバーとしては、例えば、乗員に対向した位置に配されるカバー本体と、取付用側壁とを備え、該取付用側壁近傍にエアバッグの展開時に正確にカバー本体が破断するように、該カバー本体の裏面にティアラインが形成されていて、エアバッグの展開時にカバーがティアラインに沿って正確に破断するように構成されてなる（先行技術文献１）のものが、従来技術として知られている。   As a cover of a conventional airbag device, for example, a cover main body disposed at a position facing an occupant and a mounting side wall are provided, and the cover main body is accurately broken in the vicinity of the mounting side wall when the airbag is deployed. As described above, there is a conventional structure in which a tear line is formed on the back surface of the cover body and the cover is accurately broken along the tear line when the airbag is deployed (prior art document 1). Known as technology.

特開平１０−０８１１８４号公報Japanese Patent Laid-Open No. 10-081184

しかしながら、かかる従来技術は、平板状の面積が大きいカバー本体の裏面側から直角状且つ長い取付用側壁が形成されてなり、しかも、該取付用側壁に沿ってティアラインが形成されることで、カバー本体の成形時に、キャビティー内を流れる溶融樹脂は、取付用側壁によって溶融樹脂の下流側への移動が遅くなる。特に、取付用側壁に近接するティアラインの板厚が極めて薄いため、成形型のこの部分が局部的に発熱し、カバー本体の表面に歪みが生ずるおそれがある。かかる歪みを見えにくくするために、カバー本体の表面に凹凸（しぼとも言う。）を設ければ、成形型の高騰を招くことになる。また、歪みが生じにくいカバー本体の材質を様々に試みると、開発費の高騰を招くことになる。更に、カバー本体に塗装仕上げを施すと原価高騰の一原因になる。   However, such a prior art is formed by forming a right and long mounting side wall from the back side of the cover body having a large flat area, and further, a tear line is formed along the mounting side wall. When the cover main body is molded, the molten resin flowing in the cavity is slow to move to the downstream side of the molten resin due to the mounting side wall. In particular, since the plate thickness of the tear line adjacent to the mounting side wall is extremely thin, this portion of the mold may generate heat locally, and distortion may occur on the surface of the cover body. If the surface of the cover body is provided with irregularities (also referred to as wrinkles) in order to make the distortion difficult to see, the mold will rise. In addition, if various materials are used for the cover main body that is less likely to be distorted, the development cost will increase. Furthermore, if the cover body is painted, it will cause a rise in cost.

上記の課題を解決するために、本発明は、カバー本体の表面に歪みが生じにくい構造とすることで、開発費の低減を図るエアバッグ装置のカバーを提供するものである。   In order to solve the above-described problems, the present invention provides a cover for an airbag device that reduces the development cost by adopting a structure in which the surface of the cover main body is not easily distorted.

上記の課題を解決するために、本発明の請求項１記載のエアバッグ装置のカバーは、所定の面積を有する平板状のカバー本体と該カバー本体の裏面側から垂下されてなる取付用側壁とより形成されてなり、該取付用側壁に沿って形成されてなるティアラインがエアバッグ本体の膨張力により破断して扉部となることが可能なるエアバッグ装置のカバーであって、前記扉部となるカバー本体の裏面には、前記ティアラインに沿って開裂しない淺溝部を形成してなることを特徴とする。   In order to solve the above-mentioned problems, a cover of an airbag device according to claim 1 of the present invention includes a flat cover body having a predetermined area, and a mounting side wall suspended from the back side of the cover body. A cover of an airbag device, wherein a tear line formed along the side wall for mounting is broken by an inflation force of the airbag body to become a door portion, and the door portion In the back surface of the cover main body, a groove portion that is not cleaved along the tear line is formed.

また、本発明の請求項２記載のエアバッグ装置のカバーは、請求項１記載の前記ティアラインは、車両の略水平方向に延在されてなる第１ティアラインと、該第１ティアラインの端部それぞれから直角方向に延在されてなる第２ティアラインとより形成されてなり、前記淺溝部は、前記扉部側の第１ティアライン及び前記第２ティアラインに沿って形成されてなることを特徴とする。   The cover of the airbag device according to claim 2 of the present invention is characterized in that the tear line according to claim 1 includes a first tear line extending in a substantially horizontal direction of the vehicle, and the first tear line. A second tier line extending in a direction perpendicular to each of the end portions, and the ridge groove portion is formed along the first tier line and the second tier line on the door portion side. It is characterized by that.

また、本発明の請求項３記載のエアバッグ装置のカバーは、請求項１又は請求項２記載の前記カバー本体は、車体に固定される本体部と、該本体部に囲まれて形成されてなる前記扉部とよりなり且つ前記本体部の板厚より前記扉部の板厚が厚くなるようにし、前記淺溝部の板厚は前記本体部の板厚とほぼ同一であることを特徴とする。   According to a third aspect of the present invention, there is provided a cover for an airbag device, wherein the cover main body according to the first or second aspect is formed by being surrounded by a main body portion fixed to a vehicle body and the main body portion. The door portion is thicker than the thickness of the main body portion, and the thickness of the groove portion is substantially the same as the thickness of the main body portion. .

請求項１記載の発明によれば、前記扉部となるカバー本体の裏面には、前記ティアラインに沿って開裂しない淺溝部を形成してなるため、前記ティアラインが裏面に形成されてなるカバー本体から、前記淺溝部が裏面に形成されてなるカバー本体までが遠浅状になり、前記ティアラインと前記淺溝部との間に、平均的板厚の扉部を介在していることで、ティアライン成形部にて加圧、加熱状態にある溶融樹脂の圧力と熱が解放され、淺溝部によって、溶融樹脂の扉部の内周側への移動を一旦せき止めることにより、溶融樹脂を成形型面へ確実に押圧することが出来る。従って、カバー本体の表面に歪みが生じにくいことになる。また、形状が安定することで、開発費の低減を図ることができる、という効果を奏する。   According to the first aspect of the present invention, since a groove portion that does not tear along the tear line is formed on the back surface of the cover main body that becomes the door portion, the cover in which the tear line is formed on the back surface. From the main body to the cover main body in which the ridge groove portion is formed on the back surface is a shallow shape, and a door portion having an average plate thickness is interposed between the tier line and the ridge groove portion. The pressure and heat of the molten resin in the pressurized and heated state is released in the line molding section, and the molten resin is temporarily blocked by the ridge groove section to move the molten resin to the inner peripheral side. Can be pressed reliably. Therefore, the surface of the cover main body is hardly distorted. In addition, since the shape is stabilized, the development cost can be reduced.

また、請求項２記載の発明によれば、前記ティアラインは、車両の略水平方向に延在されてなる第１ティアラインと、該第１ティアラインの端部それぞれから直角方向に延在されてなる第２ティアラインとより形成されてなり、前記淺溝部は、前記扉部側の第１ティアライン及び前記第２ティアラインに沿って形成されてなるため、扉部に充填される溶融樹脂の流れを整えることができ、成形性が向上する、という効果を奏する。   According to a second aspect of the present invention, the tear line extends in a direction perpendicular to each of a first tear line extending in a substantially horizontal direction of the vehicle and an end portion of the first tear line. And the groove portion is formed along the first tier line and the second tier line on the door portion side, so that the molten resin filled in the door portion is formed. As a result, it is possible to arrange the flow of the material and to improve the moldability.

また、請求項３記載の発明によれば、前記カバー本体は、車体に固定される本体部と、該本体部に囲まれて形成されてなる前記扉部とよりなり且つ前記本体部の板厚より前記扉部の板厚が厚くなるようにし、前記淺溝部の板厚は前記本体部の板厚とほぼ同一であるため、成形時の歪みが小さく、平滑なカバー本体が得られる、という効果を奏する。   According to a third aspect of the present invention, the cover main body includes a main body portion fixed to a vehicle body and the door portion formed by being surrounded by the main body portion, and the plate thickness of the main body portion. Further, the thickness of the door portion is made thicker, and the thickness of the groove portion is almost the same as the thickness of the main body portion, so that the distortion at the time of molding is small and a smooth cover body can be obtained. Play.

本発明の実施例１に係るカバー本体を備えたインストルメントパネルの斜視図。The perspective view of the instrument panel provided with the cover main body which concerns on Example 1 of this invention. 図１のカバー本体の表面を示す上面図。The top view which shows the surface of the cover main body of FIG. 図１のカバー本体の裏面を示す上面図。The top view which shows the back surface of the cover main body of FIG. 図３のＳＡ−ＳＡ線に沿った断面図。Sectional drawing along the SA-SA line of FIG. 図４のＢ部の拡大断面図。The expanded sectional view of the B section of FIG. 図４の成形収縮を示す図５相当断面図。FIG. 5 is a cross-sectional view corresponding to FIG. 本発明の実施例２に係る図３相当上面図。The top view equivalent to FIG. 3 concerning Example 2 of this invention.

以下、本発明の実施の形態について、詳細に説明する。本発明において、カバー本体の表面に歪みが生じにくい構造とすることで、開発費の低減を図るエアバッグ装置のカバーを提供するという目的を、所定の面積を有する平板状のカバー本体と該カバー本体の裏面側から垂下されてなる取付用側壁とより形成されてなり、該取付用側壁に沿って形成されてなるティアラインがエアバッグの膨張力により破断して扉部となることが可能なるエアバッグ装置のカバーであって、前記扉部となるカバー本体の裏面には、前記ティアラインに沿って開裂しない淺溝部を形成してなることで、実現した。以下、本発明の実施例を図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described in detail. In the present invention, a flat cover body having a predetermined area and the cover are provided for the purpose of providing a cover of an airbag device that reduces the development cost by adopting a structure in which the surface of the cover body is not easily distorted. It is formed from a mounting side wall hanging down from the back side of the main body, and a tear line formed along the mounting side wall can be broken by the inflating force of the airbag to become a door part. This is a cover of an airbag device, and is realized by forming a groove portion that does not tear along the tear line on the back surface of the cover body that is the door portion. Embodiments of the present invention will be described below with reference to the drawings.

本発明の実施例１に係る構造を、図１〜図６を用いて説明する。自動車のインストルメントパネル１のグローブボックス２の上側に配される助手席着座乗員（図示省略）用のエアバッグ装置３は、自車が衝突したか、衝突するおそれがある状態であることを検知することで信号を発信するセンサー（図示省略）と、該センサーの発信によりガス等を噴出するインフレータ（図示省略）と、該インフレータが噴出したガス等により膨張して乗員の二次衝突エネルギーを緩和するエアバッグ本体（図示省略）と、該エアバッグ本体が膨張することにより開裂する扉部４を有するカバー５とより構成されてなる。前記センサー、インフレータ、エアバッグ本体は、それぞれ周知の技術につき、詳細な説明は割愛する。符号２０は、前記インストルメントパネル１に支持されたメータ、同２１は、前記インストルメントパネル１の中央に支持された中央噴き出し口、同２２は、前記インストルメントパネル１の左右端部に支持された側部噴き出し口である。   A structure according to the first embodiment of the present invention will be described with reference to FIGS. An airbag device 3 for a passenger seated passenger (not shown) disposed on the upper side of a glove box 2 of an instrument panel 1 of an automobile detects that the own vehicle has collided or is in a state of being in danger of colliding. By doing so, a sensor (not shown) that emits a signal, an inflator (not shown) that ejects gas or the like by the transmission of the sensor, and a secondary collision energy of the occupant that is inflated by the gas or the like that is ejected by the inflator An airbag main body (not shown) to be performed, and a cover 5 having a door portion 4 that is torn when the airbag main body is inflated. The sensor, the inflator, and the airbag main body are well-known technologies, and detailed descriptions thereof are omitted. Reference numeral 20 denotes a meter supported by the instrument panel 1, 21 denotes a central outlet supported at the center of the instrument panel 1, and 22 denotes a left and right end portion of the instrument panel 1. Side spout.

前記カバー５は、所定の面積を有し、平均板厚３mmの平板状のカバー本体６と、該カバー本体６の裏面６ａの左右側から垂下され且つ平均板厚４mmの取付用側壁７，７とより形成されてなる。該取付用側壁７，７の内側（扉部４側）に沿ってティアライン８，８が形成されてなり、前記エアバッグ本体（図示省略）の膨張力により破断して前後方向に開く扉部４，４となることが可能である。前記扉部４，４となるカバー本体６の裏面６ａには、前記ティアライン８に沿って開裂しない淺溝部９を形成してなる。前記取付用側壁７，７は、図示しない周知の手段により、前記インストルメントパネル１に支持されていると共にエアバッグ装置３を吊り下げている。前記カバー本体６の裏面６ａには、図３に示すように、格子状にリブ２４が形成されてなる。符号２３は、該リブ２４の間に残った溶融樹脂を流し込むゲート跡である。   The cover 5 has a predetermined area, a flat cover body 6 having an average plate thickness of 3 mm, and mounting side walls 7 and 7 that are suspended from the left and right sides of the back surface 6a of the cover body 6 and have an average plate thickness of 4 mm. And more formed. The tear lines 8 and 8 are formed along the inside (the door part 4 side) of the mounting side walls 7 and 7, and the door part is broken by the inflating force of the airbag body (not shown) and opened in the front-rear direction. Can be 4,4. On the back surface 6a of the cover main body 6 serving as the door portions 4 and 4, a groove portion 9 that is not cleaved along the tear line 8 is formed. The mounting side walls 7 and 7 are supported by the instrument panel 1 and suspend the airbag device 3 by well-known means (not shown). As shown in FIG. 3, ribs 24 are formed on the back surface 6a of the cover body 6 in a lattice shape. Reference numeral 23 denotes a gate mark into which the molten resin remaining between the ribs 24 is poured.

また、前記ティアライン８は、車両の左右方向（図３の左右方向）且つ略水平方向に延在形成されてなる第１ティアライン１０と、該第１ティアライン１０の端部１０ａ，１０ａそれぞれから直角方向、つまり、車両の前後方向（図３の上下方向）に延在形成されてなる第２ティアライン１１，１１とより上面視略Ｈ字状に形成されてなる。該第２ティアライン１１の端部１１ａ、つまり、前記端部１０ａと反対の方向には、Ｊ字状に巻き込まれて形成され、扉部４形成の際、破断がそれ以上進まないようにすることで、扉部４がカバー本体６からちぎれないようにしている。前記淺溝部９は、図３に示すように、前記扉部４，４側の第１ティアライン１０及び前記第２ティアライン１１，１１の内側に沿った略Ｌ字状に形成されてなる。図３の上側の扉部４に形成されている前記ティアライン８は、前記淺溝部９に沿った長さと前記第１ティアライン１０に沿った長さとがほぼ等しいが、この淺溝部９もこの明細書では「略Ｌ字状」の範疇である。前記第１ティアライン１０及び前記第２ティアライン１１，１１は、エアバッグ本体の膨張により開裂可能なる板厚が、０．５mmから１mmである。   The tier line 8 includes a first tier line 10 extending in the left-right direction (left-right direction in FIG. 3) and a substantially horizontal direction of the vehicle, and ends 10a, 10a of the first tier line 10, respectively. The second tier lines 11 and 11 are formed so as to extend in the direction perpendicular to the vehicle, that is, in the vehicle front-rear direction (vertical direction in FIG. 3), and are formed in a substantially H shape in a top view. In the direction opposite to the end portion 11a of the second tier line 11, that is, the end portion 10a, the second tier line 11 is formed by being wound in a J-shape so that the breakage does not proceed further when the door portion 4 is formed. This prevents the door 4 from being broken from the cover body 6. As shown in FIG. 3, the groove 9 is formed in a substantially L shape along the inside of the first tier line 10 and the second tier lines 11, 11 on the door 4, 4 side. The tear line 8 formed on the upper door portion 4 in FIG. 3 has a length along the groove 9 that is substantially equal to a length along the first tear line 10. In the specification, it is a category of “substantially L-shaped”. The first tier line 10 and the second tier lines 11 and 11 have a plate thickness that can be cleaved by inflation of the airbag body from 0.5 mm to 1 mm.

また、前記カバー本体６は、車体に固定される本体部１２と、該本体部１２に囲まれて形成されてなる前記扉部４，４とよりなり且つ前記本体部１２の板厚である３mmより前記扉部４の板厚が４mmと１mm分厚くなるようにし、前記淺溝部９の板厚は３mmであって、前記本体部１２の板厚とほぼ同一である。つまり、淺溝部９の深さは、１mmである。前記第１ティアライン１０及び前記第２ティアライン１１，１１と淺溝部９との間の一般部４ａは、幅寸法が５mmである。   The cover main body 6 includes a main body portion 12 fixed to the vehicle body, and the door portions 4 and 4 formed so as to be surrounded by the main body portion 12, and has a plate thickness of 3 mm. Further, the thickness of the door portion 4 is increased to 4 mm and 1 mm, and the thickness of the groove portion 9 is 3 mm, which is substantially the same as the thickness of the main body portion 12. That is, the depth of the groove portion 9 is 1 mm. The general portion 4a between the first tier line 10 and the second tier lines 11, 11 and the groove portion 9 has a width dimension of 5 mm.

従って、本実施例１によれば、前記カバー本体６の裏面６ａとなる扉部４，４には、前記第１ティアライン１０及び前記第２ティアライン１１，１１の内側に沿って略Ｌ字状の開裂しない淺溝部９を形成してなるため、前記第１ティアライン１０及び前記第２ティアライン１１，１１が裏面６ａに形成されてなるカバー本体６から、前記淺溝部９が裏面６ａに形成されてなるカバー本体６までが図５に示すように遠浅状になり、前記第１ティアライン１０及び前記第２ティアライン１１，１１と前記淺溝部９との間に、平均的板厚の扉部４，４を介在していることで、第１ティアライン１０及び前記第２ティアライン１１，１１の成形型にて加圧、加熱状態にある溶融樹脂の圧力と熱が解放され、淺溝部９によって、溶融樹脂の扉部４，４の内周側への移動を一旦せき止めることにより、溶融樹脂を成形型（図示省略）面へ確実に押圧することが出来る。従って、成形後、図６に示すように、収縮しても淺溝部９によりひけによる段差が浅くなり、カバー本体６の表面６ｂに歪みが生じにくいことになる。また、形状が安定することで、開発費の低減を図ることができる、という効果を奏する。つまり、表面剛性のための基本板厚などの他の性能を維持しつつ、表面の見映えが向上するばかりか、カバー本体６の形状が安定することで、何度も試みることが不用になり、開発費の低減を図ることができる、という効果を奏する。艶ムラの発生を防止できるから、カバー本体６に塗装仕上げを施す必要もないことになる。   Therefore, according to the first embodiment, the door portions 4, 4 that are the back surface 6 a of the cover body 6 are substantially L-shaped along the inside of the first tier line 10 and the second tier lines 11, 11. From the cover main body 6 in which the first tear line 10 and the second tear lines 11, 11 are formed on the back surface 6a, the groove portion 9 is formed on the back surface 6a. As shown in FIG. 5, the formed cover main body 6 is shallow, and an average plate thickness is formed between the first tier line 10 and the second tier lines 11, 11 and the groove portion 9. By interposing the door portions 4, 4, the pressure and heat of the molten resin in the pressurized and heated state are released by the molds of the first tier line 10 and the second tier lines 11, 11, By the groove portion 9, the door portions 4 and 4 of the molten resin By damming once the movement of the circumferential side, it is possible to reliably press the molten resin into the mold (not shown) face. Therefore, as shown in FIG. 6 after the molding, even if contracted, the stepped portion due to sink marks becomes shallow due to the groove portion 9, and the surface 6b of the cover body 6 is less likely to be distorted. In addition, since the shape is stabilized, the development cost can be reduced. In other words, while maintaining other performance such as the basic plate thickness for surface rigidity, the appearance of the surface is improved, and the shape of the cover body 6 is stabilized, so it is unnecessary to try again and again. The development cost can be reduced. Since the occurrence of gloss unevenness can be prevented, there is no need to paint the cover body 6.

出願人において、図示しない成形型に部分樹脂型を貼り付けて板厚１mmと１．５mmとの２種類の淺溝部９を作成した（淺溝部９の溝深さが１mmと１．５mmとなる２種類のカバー本体６を成形した、と言う意味。）ところ、淺溝部９の溝深さが１mmの方がカバー本体６の表面６ｂのひけが少ないことを確認した。   The applicant has attached a partial resin mold to a mold (not shown) to create two types of groove portions 9 having a plate thickness of 1 mm and 1.5 mm (the groove depth of the groove portion 9 is 1 mm and 1.5 mm). It means that two types of cover main bodies 6 were formed.) However, it was confirmed that the sink depth of the surface 6b of the cover main body 6 was less when the groove depth of the ridge groove portion 9 was 1 mm.

また、前記カバー本体６は、車両の左右方向且つ略水平方向に延在されてなる第１ティアライン１０と、該第１ティアライン１０の端部１０ａ，１０ａそれぞれから前後方向に直角に延在されてなる第２ティアライン１１、１１とより上面視略Ｈ字状に形成されてなり、前記淺溝部９は、前記扉部４，４側の第１ティアライン１０及び前記第２ティアライン１１に沿った略Ｌ字状に形成されてなるため、扉部４，４に充填される溶融樹脂の流れを整えることができ、成形性が向上する、という効果を奏する。   The cover body 6 extends at right angles in the front-rear direction from the first tier line 10 extending in the left-right direction and substantially horizontal direction of the vehicle, and from the end portions 10a, 10a of the first tier line 10, respectively. The second tier lines 11, 11 are formed in a substantially H-shape when viewed from the top, and the ridge groove portion 9 includes the first tier line 10 and the second tier line 11 on the door portions 4, 4 side. Therefore, the flow of the molten resin filled in the door portions 4 and 4 can be adjusted, and the moldability is improved.

また、前記カバー本体６は、車体に固定される本体部１２と、該本体部１２に囲まれて形成されてなる前記扉部４，４とよりなり且つ前記本体部１２の板厚３mmより前記扉部４の板厚が１mm厚くなるようにし、前記扉部４に形成される淺溝部９の板厚は前記本体部１２の板厚とほぼ同一の３mmであるため、設計上における表面が図６の破線で示す面であるのに対し、表面４ｂ及び６ｂの面が約０．５mmしか歪まない。つまり、図６の実線で示すように、表面４ｂ及び６ｂの面の成形時の歪みが小さく、扉部４とカバー本体６との表面４ｂ及び６ｂが得られる、という効果を奏する。   The cover body 6 includes a body portion 12 fixed to a vehicle body, the door portions 4 and 4 formed so as to be surrounded by the body portion 12, and the thickness of the body portion 12 is 3 mm. The plate thickness of the door portion 4 is set to be 1 mm thick, and the plate thickness of the groove portion 9 formed in the door portion 4 is 3 mm, which is substantially the same as the plate thickness of the main body portion 12, so that the design surface is illustrated. In contrast to the surface indicated by the broken line 6, the surfaces 4 b and 6 b are only distorted by about 0.5 mm. That is, as shown by the solid line in FIG. 6, there is an effect that the distortion at the time of molding the surfaces 4 b and 6 b is small and the surfaces 4 b and 6 b between the door portion 4 and the cover body 6 are obtained.

また、前記淺溝部９は、幅寸法が５mmであり、第１ティアライン１０及び前記第２ティアライン１１の裏面６ａからの寸法も５mmである。   The groove 9 has a width of 5 mm, and the first tear line 10 and the second tear line 11 have a dimension of 5 mm from the back surface 6a.

本発明の実施例２に係る構造を、図７を用いて説明する。符号１３は、本発明の実施例２に係る淺溝部であって、第２ティアライン１１、１１のみに沿っている。樹脂の配合、成形型の温度等によっては、こうしたＩ字状であっても、遠淺状になり、歪みが歪みとして認識し得ないことになる。   A structure according to Embodiment 2 of the present invention will be described with reference to FIG. Reference numeral 13 denotes a groove portion according to the second embodiment of the present invention, which is only along the second tier lines 11 and 11. Depending on the composition of the resin, the temperature of the mold, etc., even such an I-shape will be a distant shape, and the distortion cannot be recognized as a distortion.

前記実施例１〜２では、自動車のインストルメントパネル１に設置されるエアバッグ装置３のカバー５を例にして説明したが、自動車に限定せず、飛行機や船舶、車両、等でも良い。また、インストルメントパネルを例にして説明したが、インストルメントパネルに限定せず、ステアリングホイールのパッドでも良い。   In the first and second embodiments, the cover 5 of the airbag apparatus 3 installed on the instrument panel 1 of the automobile has been described as an example. However, the cover 5 is not limited to the automobile, and may be an airplane, a ship, a vehicle, or the like. Further, although the instrument panel has been described as an example, the present invention is not limited to the instrument panel, and a steering wheel pad may be used.

前記実施例１〜２では、前記淺溝部９は、図３に示すように、前記扉部４，４側の第１ティアライン１０及び前記第２ティアライン１１，１１の内側に沿った略Ｌ字状に形成されてなるものを例にして説明したが、これに限らず、第２ティアライン１１，１１の外側に沿ったＩ字状を設けたものでも良い。また、前記扉部４，４の一方のみに前記淺溝部９を設けても良い。更に、前記扉部４，４側の第１ティアライン１０の端部から一方のみ直角方向に延在形成してなる第２ティアライン１１により上面視略逆Ｕ字状に形成し、前記淺溝部９を前記扉部４の角部の第１ティアライン１０及び第２ティアライン１１の外側に沿った略Ｌ字状に設けても良い。   In the said Example 1-2, the said groove part 9 is substantially L along the inner side of the 1st tear line 10 and the said 2nd tear lines 11 and 11 by the side of the said door part 4 and 4, as shown in FIG. Although the description has been given by taking the shape formed in a letter shape as an example, the present invention is not limited to this, and an I shape along the outside of the second tier lines 11 and 11 may be provided. Moreover, you may provide the said groove part 9 only in one side of the said door parts 4 and 4. FIG. Furthermore, it is formed in a substantially inverted U shape in top view by a second tier line 11 formed by extending only one side from the end of the first tier line 10 on the side of the doors 4 and 4 in a right angle direction, and the groove portion 9 may be provided in a substantially L shape along the outside of the first tier line 10 and the second tier line 11 at the corners of the door portion 4.

１ 自動車のインストルメントパネル
３ エアバッグ装置
４ 扉部
５ カバー
６ カバー本体
６ａ カバー本体の裏面
６ｂ カバー本体の表面
７ 取付用側壁
８ ティアライン
９、１３ 淺溝部
１０ ティアラインの第１ティアライン
１０ａ 第１ティアラインの端部
１１ 第２ティアライン
１２ 本体部 DESCRIPTION OF SYMBOLS 1 Automotive instrument panel 3 Airbag apparatus 4 Door part 5 Cover 6 Cover main body 6a The back surface of a cover main body 6b The surface of a cover main body 7 Side wall for attachment 8 Tier line 9, 13 Groove part 10 First tear line of a tear line 10a First End of 1 tier line 11 2nd tier line 12 Body

Claims (3)

所定の面積を有する平板状のカバー本体と該カバー本体の裏面側から垂下されてなる取付用側壁とより形成されてなり、該取付用側壁に沿って形成されてなるティアラインがエアバッグ本体の膨張力により破断して扉部となることが可能なるエアバッグ装置のカバーであって、
前記扉部となるカバー本体の裏面には、前記ティアラインに沿って開裂しない淺溝部を形成してなることを特徴とするエアバッグ装置のカバー。 A flat cover body having a predetermined area and a mounting side wall hanging from the back side of the cover body are formed, and a tear line formed along the mounting side wall is formed on the airbag body. A cover of an airbag device that can be broken by an inflating force to become a door part,
The cover of the airbag apparatus characterized by forming in the back surface of the cover main body used as the said door part the ridge groove part which is not cleaved along the said tear line. 請求項１記載のエアバッグ装置のカバーであって、
前記ティアラインは、車両の略水平方向に延在されてなる第１ティアラインと、該第１ティアラインの端部それぞれから直角方向に延在されてなる第２ティアラインとより形成されてなり、
前記淺溝部は、前記扉部側の第１ティアライン及び前記第２ティアラインに沿って形成されてなることを特徴とするエアバッグ装置のカバー。 It is a cover of the airbag apparatus of Claim 1, Comprising:
The tear line is formed by a first tear line extending in a substantially horizontal direction of the vehicle and a second tear line extending in a direction perpendicular to each end of the first tear line. ,
The cover of the airbag device, wherein the groove portion is formed along the first tier line and the second tier line on the door portion side. 請求項１又は請求項２記載のエアバッグ装置のカバーであって、
前記カバー本体は、車体に固定される本体部と、該本体部に囲まれて形成されてなる前記扉部とよりなり且つ前記本体部の板厚より前記扉部の板厚が厚くなるようにし、前記淺溝部の板厚は前記本体部の板厚とほぼ同一であることを特徴とするエアバッグ装置のカバー。 A cover of the airbag device according to claim 1 or 2,
The cover main body includes a main body portion fixed to the vehicle body and the door portion formed by being surrounded by the main body portion, and the thickness of the door portion is larger than the thickness of the main body portion. The cover of the airbag device is characterized in that the plate thickness of the groove portion is substantially the same as the plate thickness of the main body portion.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015202746A (en) * 2014-04-11 2015-11-16 ダイキョーニシカワ株式会社 Vehicular interior article having airbag door part
US11279313B2 (en) 2019-10-15 2022-03-22 Toyoda Gosei Co., Ltd. Airbag door structure

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08169291A (en) * 1994-12-16 1996-07-02 Nippon Plast Co Ltd Air bag device
JP2008517826A (en) * 2004-10-29 2008-05-29 フォールシア インネンラオム システム ゲーエムベーハー Airbag flap system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08169291A (en) * 1994-12-16 1996-07-02 Nippon Plast Co Ltd Air bag device
JP2008517826A (en) * 2004-10-29 2008-05-29 フォールシア インネンラオム システム ゲーエムベーハー Airbag flap system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015202746A (en) * 2014-04-11 2015-11-16 ダイキョーニシカワ株式会社 Vehicular interior article having airbag door part
US11279313B2 (en) 2019-10-15 2022-03-22 Toyoda Gosei Co., Ltd. Airbag door structure

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