JP3964114B2

JP3964114B2 - Airbag device for vehicle

Info

Publication number: JP3964114B2
Application number: JP2000268473A
Authority: JP
Inventors: 幸久藤田
Original assignee: Calsonic Kansei Corp
Current assignee: Calsonic Kansei Corp
Priority date: 2000-09-05
Filing date: 2000-09-05
Publication date: 2007-08-22
Anticipated expiration: 2020-09-05
Also published as: JP2002067858A

Description

【０００１】
【発明の属する技術分野】
この発明は、自動車等の車両に取付けられる車両用エアバッグ装置に関するものである。
【０００２】
【従来の技術】
自動車等の車両には、緊急時の安全手段としてエアバッグ装置を備えたものがある。上記エアバッグ装置は、以下のようなものである。
【０００３】
即ち、自動車等の車両における車室の前部には図６に示すようなインストルメントパネル１が設けられている。このインストルメントパネル１にはエアバッグ膨出用開口２が形成されている。そして、このインストルメントパネル１に対し、エアバッグ膨出用開口２を塞ぐエアバッグリッド部３と、エアバッグモジュール４とからなるエアバッグ装置５が取付けられる。
【０００４】
上記エアバッグモジュール４は、圧力気体を噴出するインフレータと、インフレータからの圧力気体によって展開するエアバッグ本体とをモジュール容器に収納したものである。エアバッグモジュール４は、その上部（開口端側）を芯材８から突設されたボルトに固定され、その下部（開口端側とは反対側）をステアリングサポートメンバ等の車体側メンバへ固定される。
【０００５】
上記インストルメントパネル１は、例えば、表面に適宜絞加工を施した芯材のみからなるハードパネルとなっている。
【０００６】
上記エアバッグリッド部３は、上記インストルメントパネル１の助手席側略半分の領域を覆う大きさを有する、インストルメントパネル１とは別体の弾性部分パットとされており、図７に示すように、表皮６（表皮材）と発泡層７と芯材８とを有する三層構造を備えている。この三層構造のエアバッグリッド部３は、予めエアバッグリッド部３の形状に成形された表皮６と芯材８とを発泡型へ入れて表皮６と芯材８との間に発泡剤を注入することによって形成される。芯材８は金属製となっているが、樹脂製としてもよい。エアバッグリッド部３はインストルメントパネル１のエアバッグ膨出用開口２の周囲に形成された段差部分に、インストルメントパネル１に対して略面一となるように取付けられている。
【０００７】
そして、エアバッグリッド部３裏面の芯材８における上記エアバッグ膨出用開口２と対応する位置に、図８に示すように、エアバッグ本体が膨出する開口部と、この開口部を塞ぐドア部１４，１５とを一度に画成するスリット１２を形成する。このスリット１２は、例えば、上記エアバッグ膨出用開口２に略対応する大きさの平面視略Ｈ字形状とし、芯材８が金属製である場合にはプレスによる打抜き加工等によって構成する。この際、スリット１２の縁部１３を、芯材８表面側へ折り返してドア部１４，１５の強度アップを計ってもよい。スリット１２部分の発泡層７や表皮６層等には、必要に応じて、後工程で開裂溝が入れられる。なお、スリット１２を平面視略Ｈ字形状とした場合には、ドア部１４，１５は二枚形成されることとなる。そして、ドア部１４，１５と開口部とのつなぎ部分（境界部分）に沿ってヒンジ部１６を構成する。
【０００８】
かかる構成によれば、車体に所定値以上の衝撃力が加わることによってエアバッグモジュール４内部に設けられたインフレータが作動すると、このインフレータから圧力気体が噴出され、エアバッグモジュール４内に折り畳んで収納されたエアバッグ本体内へと圧力気体が導入される。
【０００９】
エアバッグ本体は、この圧力気体の導入に伴って膨張し、この膨張の圧力により先ずエアバッグリッド部３のドア部１４，１５の部分が平面視略Ｈ字形状のスリット１２に沿って開裂されて膨出開口が形成されると同時に、この膨出開口からエアバッグ本体が、車体斜め後方（車室内乗員側）へ向かって膨出する。これによって、エアバッグ本体は定位置に着座している助手席側の乗員の頭部等を受け止め、頭部等がインストルメントパネル１等に当接しないように保護する。
【００１０】
【発明が解決しようとする課題】
しかしながら、このような従来の車両用エアバッグ装置では、平面視略Ｈ字形状のスリット１２を、金属製等の芯材８をプレスによる打抜き加工することよって構成していたため、プレスによる打抜き加工時に、プレス加工が裏面側から表面側へ向けて行われることにより、例えば、図８に仮想線で示すようにドア部１４，１５が上方へ曲げ変形されてしまうことがある。このような場合、例えば、発泡型で表皮６と芯材８との間に発泡剤を注入する際に、曲げ変形されたドア部１４，１５周辺の発泡剤の圧力が高くなるため部分的に圧縮状態となった発泡層７が形成されることとなるので、脱型後に発泡層７の上記圧縮部分が復元することにより、エアバッグリッド部３は表皮６の上記部分が膨らんだ外観品質の悪いものとなってしまう。
【００１１】
そこで、本発明の目的は、上記の問題点を解消し、プレスによるドア部の変形をなくして外観品質のよいエアバッグリッド部を得ることのできる車両用エアバッグ装置を提供することにある。
【００１２】
【課題を解決するための手段】
上記課題を解決するために、請求項１に記載された発明では、少なくとも表皮材と芯材とを有する複層構造のエアバッグリッド部を備え、前記芯材が、１本の横開裂部と、該横開裂部の両端を通る２本の縦開裂部とからなる平面視略Ｈ字形状の開裂部によって略中央部分に二枚のドア部を形成された車両用エアバッグ装置において、前記芯材を前記縦開裂部の端部の位置で前記横開裂部と略平行な分割線に沿い分割して、前記横開裂部に沿う一方のドア部及び該ドア部の両側に位置しかつ前記縦開裂部に沿って分割線まで延びる一対の腕部を含む分割線よりも一方の側の外周部分を有する平面視略凹型の芯材片と、前記横開裂部に沿う他方のドア部及び分割線よりも他方の側の外周部分を有する平面視略凸型の芯材片との２部品で構成し、前記平面視略凹型の芯材片における前記一方のドア部に前記芯材の一面側へ向かう面外曲げを付与形成し、前記平面視略凹型の芯材片における前記一対の腕部の他面側に前記平面視略凸型の芯材片を当接係止すると共に、前記一方のドア部を前記面外曲げに抗して前記芯材の他面側へ撓めた状態で他方のドア部の他面側に係止させることにより、前記平面視略凹型の芯材片と前記平面視略凸型の芯材片とを相互拘束させたことを特徴としている。
【００１３】
このように構成された請求項１にかかる発明によれば、前記平面視略凹型の芯材片における前記一対の腕部の他面側に前記平面視略凸型の芯材片を当接係止すると共に、前記一方のドア部を前記面外曲げに抗して前記芯材の他面側へ撓めた状態で他方のドア部の他面側に係止させることにより、前記平面視略凹型の芯材片と前記平面視略凸型の芯材片とを相互拘束させることによって、芯材をプレスで加工する時のドア部の変形を吸収することができる。そのため、外観品質のよいエアバッグリッド部を得ることができるようになる。また、２つのドア部の開裂部を形成する開放端縁部が重なっているので、開裂部の表皮材等がドア部の開放端縁部に沿って真直ぐに切れ、また、これにより表皮材等の飛散も少なくなる効果がある。
【００１４】
請求項２に記載された発明では、前記平面視略凸型の芯材片が、前記平面視略凹型の芯材片の他面側における前記一対の腕部の先端に当接係止されることを特徴としている。
【００１５】
このように構成された請求項２にかかる発明によれば、前記平面視略凸型の芯材片を、前記平面視略凹型の芯材片の他面側における前記一対の腕部の先端に当接係止させることにより、前記平面視略凹型の芯材片と前記平面視略凸型の芯材片との間の相互拘束力を得ることができる。また、相互拘束部分により、成形の際のシール性を確保することができるようになる。
【００１６】
請求項３に記載された発明では、前記平面視略凸型の芯材片が、前記平面視略凹型の芯材片の他面側における前記一対の腕部の前記縦開裂部に沿った側面に当接係止されるしている。
【００１７】
このように構成された請求項３にかかる発明によれば、前記平面視略凸型の芯材片が、前記平面視略凹型の芯材片の他面側における前記一対の腕部の前記縦開裂部に沿った側面に当接係止させることにより、前記平面視略凹型の芯材片と前記平面視略凸型の芯材片との間の相互拘束力を得ることができる。また、相互拘束部分により、成形の際のシール性を確保することができるようになる。
【００１８】
【発明の実施の形態１】
以下、本発明の具体的な実施の形態１について、図示例と共に説明する。
【００１９】
図１〜図５は、この発明の実施の形態１を示すものである。なお、前記従来例と同一ないし均等な部分については、同一の符号を付すことにより説明を省略する。
【００２０】
先ず、構成を説明すると、この実施の形態１のものでは、図２に示すように、１本の横開裂部２２と、この横開裂部２２の両端を通る２本の縦開裂部２４とからなる平面視略Ｈ字形状の開裂部２５によって略中央部分に二枚のドア部１４，１５を形成された芯材８を、縦開裂部２４の乗員側の端部２６の位置で、横開裂部２２と略平行な分割線２７に沿い分割して、凹型芯材片２８と凸型芯材片２９との２部品構成とする。なお、図２では、横開裂部２２は車幅方向２１へ延び、縦開裂部２４は車両前後方向２３へ延びるようになっているが、必ずしもこの方向に限るものではなく、例えば、横開裂部２２を車両前後方向２３へ延び、縦開裂部２４を車幅方向２１へ延びるようにしても、これ以外の方向としてもよい。
【００２１】
凹型芯材片２８は、図３に示すように、その分割部分（分割線２７に沿った部分）に、反乗員側のドア部１４と、縦開裂部２４を介してこのドア部１４の両側に位置しかつ縦開裂部２４に沿って分割線２７まで延びる一対の腕部３０を含む、分割線２７よりも一方の側の外周部分とを有する平面視略凹型となる。
【００２２】
また、凸型芯材片２９は、図４に示すように、その分割部分（分割線２７に沿った部分）に、乗員側のドア部１５、及び、分割線２７よりも他方の側の外周部分を有する平面視略凸型となる。
【００２３】
そして、凹型芯材片２８の分割部分と、凸型芯材片２９の分割部分との間に相互に重なる複数の重複部３１〜３６を形成する。この重複部３１〜３６には、横開裂部２２に対応する重複部３１，３２、縦開裂部２４に対応する重複部３３，３４、これら以外の分割線２７に沿った重複部３５，３６の３つの種類がある。そして、重複部３１，３３，３５は凹型芯材片２８側に設けられ、重複部３２，３４，３６は凸型芯材片２９側に設けられている。特に、重複部３１はドア部１４における横開裂部２２に対応する端縁部に設けられ、重複部３２はドア部１５における横開裂部２２に対応する端縁部に設けられている。また、重複部３３は腕部３０における縦開裂部２４の凸型芯材片２９側略１／２部に対応する側縁部に設けられ、重複部３４はドア部１５における縦開裂部２４の凸型芯材片２９側略１／２部に対応する側縁部に設けられている。重複部３５は腕部３０における端縁部に設けられ、重複部３６は凸型芯材片２９における分割線２７に沿った分割部分に設けられている。
【００２４】
更に、凹型芯材片２８のドア部１４に、予め芯材８の裏面側（表面側としてもよい。この場合には、以降の表裏の関係が逆となる。以下、裏面側とした場合について説明する）へ向かう所要量の曲げ加工を施す。この裏面側への面外曲げＡは、凹型芯材片２８をプレス加工する際に同時に形成するのがよい。この裏面側への面外曲げＡの屈曲中心は、ドア部１４のヒンジ部１６の位置とするのがよい。ちなみに、プレス加工は、裏面側から表面側へ向けて行われることを想定しているが、表面側から裏面側へ向けて行われるようにしてもよい。
【００２５】
そして、平面視略凹型の芯材片２８における一対の腕部３０の表面側に平面視略凸型の芯材片２９を当接係止すると共に、面外曲げＡが形成された一方のドア部１４を芯材８の表面側へ撓めて他方のドア部１５の表面側に係止させることにより、平面視略凹型の芯材片２８と平面視略凸型の芯材片２９とを相互拘束させる。
【００２６】
より具体的には、凹型芯材片２８の重複部３３，３５の表面側に凸型芯材片２９の重複部３４，３６を当接係止すると共に、凹型芯材片２８におけるドア部１４を面外曲げＡに抗して表面側へ撓めた状態でドア部１４の重複部３１を凸型芯材片２９におけるドア部１５の重複部３２の表面側に係止させる。
【００２７】
最後に、凹型芯材片２８と凸型芯材片２９とを相互拘束状態で組合せた後に、両者をスポット溶接にて一体化する。ここで、相互拘束とは、凹型芯材片２８と凸型芯材片２９との一方を持って他方を離した場合に、他方が落下しないように互いに拘束し合っている状態をいう。
【００２８】
また、少なくとも、凹型芯材片２８における、縦開裂部２４の反凸型芯材片２９側部分にシールテープ４０を貼着する。必要に応じて、重複部３１，３２の間、重複部３３，３４の間、重複部３５，３６の間にも、同様のシールテープ４１，４２を貼着してもよい。このシールテープ４０〜４２は、紙製でもウレタンやスポンジ等の樹脂製でもよい。
【００２９】
次に、この実施の形態１の作用について説明する。
【００３０】
エアバッグ装置５の作動する過程については図６〜図８の場合と同様なので説明を省略する。
【００３１】
この実施の形態１では、芯材８を、凹型芯材片２８と凸型芯材片２９との２部品構成とすると共に、分割線２７に沿った凹型芯材片２８の分割部分と凸型芯材片２９の分割部分との間に複数の重複部３１〜３６を形成し、凹型芯材片２８のドア部１４に裏面側への面外曲げＡを形成して、凸型芯材片２９の重複部３４，３６を凹型芯材片２８の重複部３３，３５の表面側に当接係止し、凹型芯材片２８におけるドア部１４を面外曲げＡに抗して表面側へ撓めた状態でドア部１４の重複部３１を凸型芯材片２９におけるドア部１５の重複部３２の表面側に係止させることにより、平面視略凹型の芯材片２８と平面視略凸型の芯材片２９とが相互拘束された状態となる。
【００３２】
このように、凹型芯材片２８と凸型芯材片２９とを相互に拘束・矯正させ合うことによって、芯材８をプレスで加工する時のドア部１４，１５の変形を吸収することができる。そのため、外観品質のよいエアバッグリッド部３を得ることができるようになる。
【００３３】
例えば、表皮６と発泡層７と芯材８とを有する３層構造のエアバッグリッド部３の場合、表皮６と芯材８との間に発泡剤を注入して発泡層７を形成する発泡成形の際の、芯材８の変形による発泡層７の部分的な圧縮を防止して、脱型後に外観品質のよいエアバッグリッド部３を得ることができるようになる。
【００３４】
そして、２つのドア部１４，１５の開裂部２５を形成する開放端縁部が重なっているので（重複部３１〜３４）、開裂部２５の表皮６や発泡層７がドア部１４，１５の開放端縁部に沿って真直ぐに切れる。また、これにより発泡層７の飛散も少なくなる効果がある。
【００３５】
また、少なくとも、凹型芯材片２８における、縦開裂部２４の反凸型芯材片２９側部分にシールテープ４０を貼着することにより、発泡型で表皮６と芯材８との間に発泡剤を注入する際に、縦開裂部２４の反凸型芯材片２９側１／２部にできる隙間から発泡剤が漏れるのを防止することができる。
【００３６】
また、横開裂部２２に対応する重複部３１，３２、縦開裂部２４の凸型芯材片２９側略１／２部に対応する重複部３３，３４、その他の重複部３５，３６を設けることにより、発泡剤が漏れる隙間をなくすことができ、シールテープ４０を貼着する手間をなくすことができる。しかも、重複部３１〜３６にシールテープ４１，４２を貼着することも可能であり、このようにすることにより、発泡成形の際の発泡剤の漏れを一層確実に防止することができる。
【００３７】
以上、この発明の実施の形態を図面により詳述してきたが、具体的な構成はこの実施の形態に限らず、この発明の要旨を逸脱しない範囲の設計の変更等があってもこの発明に含まれる。
【００３８】
例えば、芯材８は、縦開裂部２４の反乗員側の端部の位置で、凹型芯材片と凸型芯材片とに分割してもよい。
【００３９】
また、この実施の形態の技術が適用されるエアバッグリッド部３は、表皮６と発泡層７と芯材８とを有する３層構造のものに限られるものではなく、表皮６と芯材８とを有する２層構造のものや、４層構造以上のものに対しても適用が可能である。また、表皮６には、多層ラミネートシート等の表皮材を用いてもよい。この多層ラミネートシートは、例えば、表皮層や発泡材層やバリア層等を適宜積層したものである。
【００４０】
【発明の効果】
以上説明してきたように、請求項１の発明によれば、平面視略凹型の芯材片における一対の腕部の他面側に平面視略凸型の芯材片を当接係止すると共に、前記一方のドア部を前記面外曲げに抗して前記芯材の他面側へ撓めた状態で他方のドア部の他面側に係止させることにより、平面視略凹型の芯材片と平面視略凸型の芯材片とを相互拘束させることによって、芯材をプレスで加工する時のドア部の変形を吸収することができる。そのため、外観品質のよいエアバッグリッド部を得ることができるようになる。また、２つのドア部の開裂部を形成する開放端縁部が重なっているので、開裂部の表皮材等がドア部の開放端縁部に沿って真直ぐに切れ、また、これにより表皮材等の飛散も少なくなる効果がある。
【００４１】
請求項２の発明によれば、平面視略凸型の芯材片を、平面視略凹型の芯材片の他面側における一対の腕部の先端に当接係止させることにより、平面視略凹型の芯材片と平面視略凸型の芯材片との間の相互拘束力を得ることができる。また、相互拘束部分により、成形の際のシール性を確保することができるようになる。
【００４２】
請求項３の発明によれば、平面視略凸型の芯材片が、平面視略凹型の芯材片の他面側における一対の腕部の縦開裂部に沿った側面に当接係止させることにより、平面視略凹型の芯材片と平面視略凸型の芯材片との間の相互拘束力を得ることができる。また、相互拘束部分により、成形の際のシール性を確保することができるようになる、という実用上有益な効果を発揮し得る。
【図面の簡単な説明】
【図１】本発明の実施の形態１にかかるエアバッグリッド部の側方断面図である。
【図２】図１の芯材を分割した状態を示す斜視図である。
【図３】図２の反乗員側芯材片の平面図である。
【図４】図２の乗員側芯材片平面図である。
【図５】図２の芯材の部分拡大斜視図である。
【図６】従来例を説明するインストルメントパネル部分の分解斜視図である。
【図７】図６のエアバッグリッド部の側方断面図である。
【図８】図７の芯材の平面図である。
３エアバッグリッド部
６表皮
７発泡層
８芯材
１４ドア部
１５ドア部
２１車幅方向
２２横開裂部
２３車両前後方向
２４縦開裂部
２５開裂部
２６端部
２７分割線
２８凹側芯材片
２９凸側芯材片
３０腕部
３１重複部
３２重複部
３３重複部
３４重複部
３５重複部
３６重複部
Ａ面外曲げ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle airbag device attached to a vehicle such as an automobile.
[0002]
[Prior art]
Some vehicles such as automobiles have an airbag device as a safety means in an emergency. The airbag device is as follows.
[0003]
That is, an instrument panel 1 as shown in FIG. 6 is provided in the front part of the passenger compartment in a vehicle such as an automobile. An air bag inflation opening 2 is formed in the instrument panel 1. And the airbag apparatus 5 which consists of the airbag grid part 3 and the airbag module 4 which block | close the opening 2 for airbag inflation with respect to this instrument panel 1 is attached.
[0004]
The airbag module 4 is a module container in which an inflator that ejects pressurized gas and an airbag body that is deployed by pressurized gas from the inflator are accommodated. The airbag module 4 has an upper portion (opening end side) fixed to a bolt projecting from the core member 8 and a lower portion (opposite the opening end side) fixed to a vehicle body side member such as a steering support member. The
[0005]
The instrument panel 1 is, for example, a hard panel made only of a core material whose surface is appropriately drawn.
[0006]
The airbag grid portion 3 is an elastic partial pad that is separate from the instrument panel 1 and has a size that covers a substantially half region of the instrument panel 1 on the passenger seat side, as shown in FIG. And a three-layer structure having a skin 6 (skin material), a foam layer 7 and a core material 8. In the air bag grid part 3 having the three-layer structure, the skin 6 and the core material 8 which are previously formed into the shape of the air bag grid part 3 are put into a foaming mold, and a foaming agent is injected between the skin 6 and the core material 8. Formed by. The core material 8 is made of metal, but may be made of resin. The airbag grid part 3 is attached to a step portion formed around the airbag inflation opening 2 of the instrument panel 1 so as to be substantially flush with the instrument panel 1.
[0007]
Then, as shown in FIG. 8, at the position corresponding to the airbag inflating opening 2 in the core member 8 on the back surface of the airbag grid part 3, as shown in FIG. 8, an opening for inflating the airbag main body, and a door for closing the opening. The slits 12 that define the portions 14 and 15 at a time are formed. The slit 12 has, for example, a substantially H-shape in a plan view having a size substantially corresponding to the airbag inflation opening 2, and is configured by punching by a press or the like when the core member 8 is made of metal. At this time, the edge portion 13 of the slit 12 may be folded back to the surface side of the core member 8 to increase the strength of the door portions 14 and 15. In the foam layer 7 and the skin 6 layer of the slit 12 portion, a cleavage groove is formed in a later step as necessary. In addition, when the slit 12 is substantially H-shaped in a plan view, two door portions 14 and 15 are formed. And the hinge part 16 is comprised along the connection part (boundary part) of the door parts 14 and 15 and an opening part.
[0008]
According to this configuration, when an inflator provided inside the airbag module 4 is actuated by applying an impact force of a predetermined value or more to the vehicle body, the pressure gas is ejected from the inflator and folded into the airbag module 4 and stored. A pressure gas is introduced into the airbag main body.
[0009]
The airbag main body is inflated with the introduction of the pressure gas, and the pressure of the inflation first causes the door portions 14 and 15 of the airbag grid portion 3 to be cleaved along the slits 12 that are substantially H-shaped in plan view. At the same time as the bulge opening is formed, the airbag body bulges from the bulge opening toward the rear of the vehicle body (in the passenger compartment). As a result, the airbag body receives the passenger's head on the passenger seat seated at a fixed position and protects the head from being in contact with the instrument panel 1 or the like.
[0010]
[Problems to be solved by the invention]
However, in such a conventional vehicle airbag device, the slit 12 having a substantially H shape in plan view is configured by punching a core material 8 made of metal or the like with a press. When the pressing process is performed from the back surface side to the front surface side, for example, the door portions 14 and 15 may be bent and deformed upward as indicated by a virtual line in FIG. In such a case, for example, when the foaming agent is injected between the skin 6 and the core material 8 in a foaming mold, the pressure of the foaming agent around the door parts 14 and 15 that are bent and deformed is increased, so that it is partially Since the compressed foam layer 7 is formed, the compressed portion of the foam layer 7 is restored after demolding. As a result, the air bag grid portion 3 has the above-mentioned portion of the skin 6 swelled and the appearance quality is poor. It becomes a thing.
[0011]
SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle airbag device capable of solving the above-described problems and obtaining an airbag grid portion having a good appearance quality by eliminating deformation of a door portion caused by a press.
[0012]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the invention described in claim 1, the air bag grid portion having a multilayer structure having at least a skin material and a core material is provided, and the core material has one lateral cleavage portion, In the vehicle airbag apparatus, in which two door portions are formed in a substantially central portion by a substantially H-shaped cleavage portion in plan view comprising two longitudinal cleavage portions passing through both ends of the lateral cleavage portion, the core member Is divided along a dividing line substantially parallel to the lateral cleavage portion at the position of the end of the longitudinal cleavage portion, and is located on one door portion along the lateral cleavage portion and on both sides of the door portion, and the longitudinal cleavage. A substantially concave core piece in plan view having an outer peripheral portion on one side of a parting line including a pair of arms extending to the parting line along the part, and the other door part and the parting line along the lateral cleavage part also composed of two parts in plan view substantially convex core piece having an outer peripheral portion of the other side, before An out-of-plane bending toward the one surface side of the core material is imparted to the one door portion of the substantially concave core material piece in plan view, and the other surface side of the pair of arms in the substantially concave core material piece in plan view And the other door portion in a state where the one door portion is bent to the other surface side against the out-of-plane bending. By engaging with the other surface side, the core member piece having a substantially concave shape in plan view and the core member piece having a substantially convex shape in plan view are mutually constrained.
[0013]
According to the invention according to claim 1 configured as described above, the substantially convex core member in plan view is brought into contact with the other surface side of the pair of arms in the substantially concave core member in plan view. The one door portion is bent to the other surface side of the core member against the out-of-plane bending, and is locked to the other surface side of the other door portion. By mutually constraining the concave core piece and the substantially convex core piece in plan view, it is possible to absorb the deformation of the door when the core is processed by a press. Therefore, an air bag grid part with good appearance quality can be obtained. In addition, since the open end edges that form the cleaved portions of the two door portions overlap, the skin material of the cleaved portion cuts straight along the open end edge of the door portion, and thereby the skin material, etc. This has the effect of reducing the amount of scattering.
[0014]
In the invention described in claim 2, the core material piece having a substantially convex shape in plan view is abutted and locked to the distal ends of the pair of arm portions on the other surface side of the core material piece having a substantially concave shape in plan view. It is characterized by that.
[0015]
According to the invention concerning Claim 2 comprised in this way, the said planar view substantially convex core material piece is made into the front-end | tip of a pair of arm part in the other surface side of the said planar view substantially concave core material piece. By abutting and locking, a mutual restraining force between the substantially concave core member in plan view and the substantially convex core member in plan view can be obtained. Moreover, the sealing property at the time of shaping | molding can be ensured now by a mutual restraint part.
[0016]
In the invention described in claim 3, the core member piece having a substantially convex shape in plan view is a side surface along the longitudinally split portion of the pair of arm portions on the other surface side of the core member piece having a substantially concave shape in plan view. It is contacted and locked to.
[0017]
According to the invention according to claim 3 configured as described above, the core member piece having a substantially convex shape in a plan view is the vertical portion of the pair of arms on the other surface side of the core member piece having a substantially concave shape in a plan view. By abutting and engaging with the side surface along the cleavage portion, it is possible to obtain a mutual restraining force between the core member piece that is substantially concave in plan view and the core member piece that is substantially convex in plan view. Moreover, the sealing property at the time of shaping | molding can be ensured now by a mutual restraint part.
[0018]
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1
Hereinafter, a specific first exemplary embodiment of the present invention will be described together with illustrated examples.
[0019]
1 to 5 show a first embodiment of the present invention. Note that the same or equivalent parts as those in the conventional example are denoted by the same reference numerals and the description thereof is omitted.
[0020]
First, the configuration will be described. In the first embodiment, as shown in FIG. 2, from one lateral cleavage portion 22 and two longitudinal cleavage portions 24 passing through both ends of the lateral cleavage portion 22. The core material 8 having the two door portions 14 and 15 formed at the substantially central portion by the substantially H-shaped cleavage portion 25 in plan view is laterally cleaved at the position of the end portion 26 on the passenger side of the longitudinal cleavage portion 24. It is divided along a dividing line 27 substantially parallel to the portion 22 to form a two-part configuration of a concave core piece 28 and a convex core piece 29. In FIG. 2, the laterally cleaved portion 22 extends in the vehicle width direction 21 and the longitudinally cleaved portion 24 extends in the vehicle front-rear direction 23, but is not necessarily limited to this direction. 22 may extend in the vehicle front-rear direction 23, and the longitudinally cleaved portion 24 may extend in the vehicle width direction 21, or other directions may be used.
[0021]
As shown in FIG. 3, the concave core piece 28 is divided into a divided portion (a portion along the dividing line 27) on both sides of the door portion 14 via a door portion 14 on the side opposite to the occupant and a longitudinally cleaved portion 24. And a pair of arm portions 30 extending to the dividing line 27 along the longitudinally cleaved portion 24 and having an outer peripheral portion on one side of the dividing line 27 .
[0022]
Further, as shown in FIG. 4, the convex core piece 29 has a divided portion (a portion along the dividing line 27), an occupant side door portion 15 , and an outer periphery on the other side of the dividing line 27. It becomes a substantially convex shape in plan view having a portion .
[0023]
A plurality of overlapping portions 31 to 36 that overlap each other are formed between the divided portion of the concave core piece 28 and the divided portion of the convex core piece 29. The overlapping portions 31 to 36 include overlapping portions 31 and 32 corresponding to the lateral cleavage portion 22, overlapping portions 33 and 34 corresponding to the longitudinal cleavage portion 24, and overlapping portions 35 and 36 along the dividing line 27 other than these. There are three types. The overlapping portions 31, 33, and 35 are provided on the concave core piece 28 side, and the overlapping portions 32, 34, and 36 are provided on the convex core piece 29 side. In particular, the overlapping portion 31 is provided at an end edge portion corresponding to the lateral cleavage portion 22 in the door portion 14, and the overlapping portion 32 is provided at an edge portion corresponding to the lateral cleavage portion 22 in the door portion 15. In addition, the overlapping portion 33 is provided on a side edge portion of the arm portion 30 corresponding to the substantially half portion of the longitudinally cleaved portion 24 on the convex core material piece 29 side, and the overlapping portion 34 is provided on the door portion 15. It is provided on the side edge corresponding to approximately 1/2 part on the convex core piece 29 side. The overlapping portion 35 is provided at an edge portion of the arm portion 30, and the overlapping portion 36 is provided at a divided portion along the dividing line 27 in the convex core piece 29.
[0024]
Furthermore, the door portion 14 of the concave core piece 28 may be preliminarily provided on the back surface side (the front surface side of the core material 8. In this case, the relationship between the front and back is reversed. Apply the required amount of bending toward (explain). This out-of-plane bending A toward the back surface is preferably formed at the same time when the concave core piece 28 is pressed. The center of bending of the out-of-plane bending A toward the back side is preferably the position of the hinge portion 16 of the door portion 14. Incidentally, although it is assumed that the press work is performed from the back surface side to the front surface side, it may be performed from the front surface side to the back surface side.
[0025]
One door in which an out-of-plane bend A is formed while the substantially convex core member 29 in a plan view is brought into contact with and locked to the surface side of the pair of arms 30 in the core member 28 in a substantially concave shape in a plan view. By bending the portion 14 toward the surface side of the core member 8 and locking it to the surface side of the other door portion 15, a core member piece 28 having a substantially concave shape in plan view and a core member piece 29 having a substantially convex shape in plan view. Mutually constrain.
[0026]
More specifically, the overlapping portions 34 and 36 of the convex core piece 29 are brought into contact with and locked to the surface side of the overlapping portions 33 and 35 of the concave core piece 28, and the door portion 14 in the concave core piece 28 is also secured. The overlapping portion 31 of the door portion 14 is locked to the surface side of the overlapping portion 32 of the door portion 15 in the convex core member piece 29 in a state where it is bent to the surface side against the out-of-plane bending A.
[0027]
Finally, after combining the concave core piece 28 and the convex core piece 29 in a mutually constrained state, they are integrated by spot welding. Here, the mutual restraint refers to a state in which when one of the concave core piece 28 and the convex core piece 29 is held and the other is separated, the other is restrained so that the other does not fall.
[0028]
In addition, the seal tape 40 is attached to at least a part of the concave core piece 28 on the side of the longitudinally cleaved portion 24 on the side of the anticonvex core piece 29. Similar seal tapes 41 and 42 may be attached between the overlapping portions 31 and 32, between the overlapping portions 33 and 34, and between the overlapping portions 35 and 36, if necessary. The seal tapes 40 to 42 may be made of paper or resin such as urethane or sponge.
[0029]
Next, the operation of the first embodiment will be described.
[0030]
The process of operating the airbag device 5 is the same as in the case of FIGS.
[0031]
In the first embodiment, the core material 8 has a two-part configuration including a concave core piece 28 and a convex core piece 29, and a divided portion of the concave core piece 28 along the dividing line 27 and a convex shape. A plurality of overlapping portions 31 to 36 are formed between the divided portions of the core piece 29, an out-of-plane bend A toward the back side is formed on the door portion 14 of the concave core piece 28, and the convex core piece The overlapping portions 34 and 36 of 29 are contacted and locked to the surface side of the overlapping portions 33 and 35 of the concave core piece 28, and the door portion 14 in the concave core piece 28 is moved to the surface side against the out-of-plane bending A. When the overlapping portion 31 of the door portion 14 is locked to the surface side of the overlapping portion 32 of the door portion 15 in the convex core piece 29 in the bent state, the substantially concave core piece 28 in plan view and the plan view substantially omitted. The convex core piece 29 is in a mutually restrained state.
[0032]
In this way, by constraining and correcting the concave core piece 28 and the convex core piece 29 to each other, it is possible to absorb the deformation of the door portions 14 and 15 when the core material 8 is processed by a press. it can. Therefore, it is possible to obtain the air bag grid portion 3 with good appearance quality.
[0033]
For example, in the case of a three-layer airbag grid part 3 having an outer skin 6, a foam layer 7 and a core material 8, foam molding is performed by injecting a foaming agent between the skin 6 and the core material 8 to form the foam layer 7. In this case, partial compression of the foamed layer 7 due to deformation of the core material 8 can be prevented, and the air bag grid portion 3 with good appearance quality can be obtained after demolding.
[0034]
And since the open edge part which forms the cleaving part 25 of the two door parts 14 and 15 has overlapped (overlapping part 31-34), the skin 6 and the foaming layer 7 of the cleaving part 25 are the door parts 14 and 15's. Cut straight along the open edge. This also has the effect of reducing the scattering of the foam layer 7.
[0035]
Further, at least in the concave core piece 28, foaming is performed between the skin 6 and the core material 8 with a foaming mold by sticking the seal tape 40 to the anti-convex type core material 29 side portion of the longitudinally cleaved portion 24. When the agent is injected, it is possible to prevent the foaming agent from leaking from the gap formed in the ½ portion on the side of the anti-convex core member 29 of the longitudinally cleaved portion 24.
[0036]
In addition, overlapping portions 31 and 32 corresponding to the laterally splitting portion 22, overlapping portions 33 and 34 corresponding to approximately half of the longitudinally splitting portion 24 on the convex core piece 29 side, and other overlapping portions 35 and 36 are provided. As a result, the gap through which the foaming agent leaks can be eliminated, and the trouble of sticking the seal tape 40 can be eliminated. And it is also possible to stick the sealing tapes 41 and 42 to the overlapping parts 31-36, and by doing in this way, the leakage of the foaming agent at the time of foam molding can be prevented more reliably.
[0037]
The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and the present invention can be changed even if there is a design change or the like without departing from the gist of the present invention. included.
[0038]
For example, the core material 8 may be divided into a concave core piece and a convex core piece at the position of the end portion on the side opposite to the occupant of the longitudinally cleaved portion 24.
[0039]
Further, the air bag grid portion 3 to which the technology of this embodiment is applied is not limited to a three-layer structure having the skin 6, the foam layer 7, and the core material 8, but the skin 6 and the core material 8 The present invention can also be applied to a two-layer structure having a four-layer structure or more. The skin 6 may be a skin material such as a multilayer laminate sheet. This multilayer laminate sheet is obtained by appropriately laminating a skin layer, a foam material layer, a barrier layer, and the like, for example.
[0040]
【The invention's effect】
As described above, according to the first aspect of the present invention, the substantially convex core member in plan view is abutted and locked to the other surface side of the pair of arms in the substantially concave core member in plan view. The one door part is locked to the other surface side of the other door part in a state where it is bent to the other surface side of the core material against the out-of-plane bending, so that the core material is substantially concave in a plan view. By mutually constraining the piece and the substantially convex core member in plan view, it is possible to absorb the deformation of the door portion when the core member is processed by a press. Therefore, an air bag grid part with good appearance quality can be obtained. In addition, since the open end edges that form the cleaving portions of the two door portions overlap, the skin material of the cleaving portion cuts straight along the open end edge portions of the door portions, and thereby the skin material, etc. This has the effect of reducing the amount of scattering.
[0041]
According to the second aspect of the present invention, the substantially convex core member in plan view is brought into contact with and locked to the distal ends of the pair of arms on the other surface side of the substantially concave core member in plan view. A mutual restraint force between the substantially concave core member piece and the substantially convex core member piece in plan view can be obtained. Moreover, the sealing property at the time of shaping | molding can be ensured now by a mutual restraint part.
[0042]
According to the invention of claim 3, the substantially convex core member in plan view is abutted and locked to the side surfaces along the longitudinally split portions of the pair of arms on the other surface side of the substantially concave core member in plan view. By doing so, it is possible to obtain a mutual restraining force between the core member piece that is substantially concave in plan view and the core member piece that is substantially convex in plan view. In addition, a practically beneficial effect that the sealing property during molding can be ensured by the mutual restraint portion can be exhibited.
[Brief description of the drawings]
FIG. 1 is a side cross-sectional view of an airbag grid section according to a first embodiment of the present invention.
FIG. 2 is a perspective view showing a state in which the core material of FIG. 1 is divided.
FIG. 3 is a plan view of the non-occupant side core member piece of FIG. 2;
4 is a plan view of the occupant-side core material piece of FIG. 2. FIG.
FIG. 5 is a partially enlarged perspective view of the core member of FIG. 2;
FIG. 6 is an exploded perspective view of an instrument panel portion for explaining a conventional example.
7 is a side sectional view of the air bag grid portion of FIG. 6;
8 is a plan view of the core material of FIG. 7;
DESCRIPTION OF SYMBOLS 3 Airbag grid part 6 Skin 7 Foam layer 8 Core material 14 Door part 15 Door part 21 Vehicle width direction 22 Lateral cleaving part 23 Vehicle front-back direction 24 Longitudinal cleaving part 25 Cleaving part 26 End part 27 Dividing line 28 Concave side core material piece 29 Convex-side core piece 30 Arm portion 31 Overlap portion 32 Overlap portion 33 Overlap portion 34 Overlap portion 35 Overlap portion 36 Overlap portion A Out-of-plane bending

Claims

少なくとも表皮材と芯材とを有する複層構造のエアバッグリッド部を備え、
前記芯材が、１本の横開裂部と、該横開裂部の両端を通る２本の縦開裂部とからなる平面視略Ｈ字形状の開裂部によって略中央部分に二枚のドア部を形成された車両用エアバッグ装置において、
前記芯材を前記縦開裂部の端部の位置で前記横開裂部と略平行な分割線に沿い分割して、
前記横開裂部に沿う一方のドア部及び該ドア部の両側に位置しかつ前記縦開裂部に沿って分割線まで延びる一対の腕部を含む分割線よりも一方の側の外周部分を有する平面視略凹型の芯材片と、
前記横開裂部に沿う他方のドア部及び分割線よりも他方の側の外周部分を有する平面視略凸型の芯材片との２部品で構成し、
前記平面視略凹型の芯材片における前記一方のドア部に前記芯材の一面側へ向かう面外曲げを付与形成し、
前記平面視略凹型の芯材片における前記一対の腕部の他面側に前記平面視略凸型の芯材片を当接係止すると共に、
前記一方のドア部を前記面外曲げに抗して前記芯材の他面側へ撓めた状態で他方のドア部の他面側に係止させることにより、
前記平面視略凹型の芯材片と前記平面視略凸型の芯材片とを相互拘束させたことを特徴とする車両用エアバッグ装置。Provided with an airgrid portion having a multilayer structure having at least a skin material and a core material,
The core member has two door portions at a substantially central portion by a substantially H-shaped cleavage portion in plan view, which is composed of one lateral cleavage portion and two longitudinal cleavage portions passing through both ends of the lateral cleavage portion. In the formed vehicle airbag device,
The core material is divided along a dividing line substantially parallel to the lateral cleavage part at the position of the end of the longitudinal cleavage part,
A plane having an outer peripheral portion on one side of a dividing line including one door portion along the lateral cleavage portion and a pair of arm portions located on both sides of the door portion and extending to the dividing line along the vertical cleavage portion. A generally concave core piece,
Consists of two parts, a core member piece having a substantially convex shape in plan view and having an outer peripheral portion on the other side of the other door portion and the dividing line along the lateral cleavage portion ,
An out-of-plane bending toward the one surface side of the core material is imparted to the one door portion of the core material piece having a substantially concave shape in plan view,
While abutting and locking the substantially convex core member in plan view on the other surface side of the pair of arms in the substantially concave core member in plan view,
By locking the one door part to the other surface side of the other door part in a state where it is bent to the other surface side of the core material against the out-of-plane bending ,
A vehicular airbag device characterized in that the substantially concave core member in plan view and the substantially convex core member in plan view are mutually constrained.

前記平面視略凸型の芯材片が、前記平面視略凹型の芯材片の他面側における前記一対の腕部の先端に当接係止されることを特徴とする請求項１記載の車両用エアバッグ装置。 The core member piece having a substantially convex shape in plan view is abutted and locked to the distal ends of the pair of arm portions on the other surface side of the core member piece having a substantially concave shape in plan view. Vehicle airbag device.

前記平面視略凸型の芯材片が、前記平面視略凹型の芯材片の他面側における前記一対の腕部の前記縦開裂部に沿った側面に当接係止されることを特徴とする請求項１記載の車両用エアバッグ装置。 The core member piece having a substantially convex shape in a plan view is abutted and locked to a side surface of the pair of arm portions on the other side of the core member piece having a substantially concave shape in a plan view. The vehicle airbag device according to claim 1.