JP5920124B2 - Manufacturing method of airbag device and airbag device - Google Patents

Manufacturing method of airbag device and airbag device Download PDF

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JP5920124B2
JP5920124B2 JP2012193459A JP2012193459A JP5920124B2 JP 5920124 B2 JP5920124 B2 JP 5920124B2 JP 2012193459 A JP2012193459 A JP 2012193459A JP 2012193459 A JP2012193459 A JP 2012193459A JP 5920124 B2 JP5920124 B2 JP 5920124B2
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wall portion
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claw
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健一 袋野
健一 袋野
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Toyoda Gosei Co Ltd
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本発明は、エアバッグとインフレーターとを収納するケースが、合成樹脂製とし、かつ、エアバッグカバーを係止して連結する構成のエアバッグ装置の製造方法とエアバッグ装置に関する。 The present invention relates to a method for manufacturing an airbag device and an airbag device in which a case for housing an airbag and an inflator is made of a synthetic resin, and an airbag cover is locked and connected.

従来のエアバッグ装置、例えば、助手席用エアバッグ装置では、エアバッグとインフレーターとを収納するケースが、組付を簡便に行えるように、エアバッグカバーを係止する複数の係止爪を備えて構成されるとともに、軽量化を図れるように合成樹脂製とするものが知られている(例えば、特許文献1,2参照)。   In a conventional airbag device, for example, a passenger seat airbag device, a case for storing an airbag and an inflator includes a plurality of locking claws for locking an airbag cover so that the assembly can be easily performed. And made of synthetic resin so that the weight can be reduced (for example, see Patent Documents 1 and 2).

これらのエアバッグ装置では、ケースが、底壁部と、底壁部の外周縁から上方に延びる四角筒形状の周壁部と、を有して上方を開口させた略直方体形状とし、インフレーター及び折り畳まれたエアバッグを底壁部に保持させていた。エアバッグカバーは、合成樹脂製とし、収納されたエアバッグを覆って、膨張時のエアバッグに押されて開く扉部を有した天井壁部と、扉部の周囲から下方に延びてケースの周壁部の外周側に配置されるとともに周壁部に連結される略四角筒形状の連結壁部と、を備えて構成されていた。ケースの周壁部の対向する一対の対向壁部は、それぞれ、連結壁部を係止可能に、外方へ突出する複数の係止爪を備えていた。エアバッグカバーの連結壁部は、係止爪に係止可能に、係止爪を挿入させるための貫通した複数の係止孔を備えて構成されていた。   In these airbag apparatuses, the case has a substantially rectangular parallelepiped shape having a bottom wall portion and a rectangular cylindrical peripheral wall portion extending upward from the outer peripheral edge of the bottom wall portion, and opening the upper portion. The air bag was held on the bottom wall. The airbag cover is made of synthetic resin, covers the stored airbag, has a ceiling wall portion having a door portion that is pushed by the airbag when inflated and opens, and extends downward from the periphery of the door portion. And a connecting wall portion having a substantially rectangular tube shape that is disposed on the outer peripheral side of the peripheral wall portion and connected to the peripheral wall portion. Each of the pair of opposing wall portions facing each other of the peripheral wall portion of the case includes a plurality of locking claws protruding outward so that the connection wall portion can be locked. The connecting wall portion of the airbag cover is configured to include a plurality of through-holes through which the engaging claws are inserted so as to be engageable with the engaging claws.

そして、各係止爪は、組付時、ケースの周壁部の外周側にエアバッグカバーの連結壁部を配置させ、かつ、連結壁部の係止孔に挿入し易いように、ケース側に押し下げる連結壁部の下端を拡開させるように係止爪の外周側に滑らせて案内可能に、傾斜した案内面を外表面に備えていた。   Each of the locking claws is arranged on the case side so that the connecting wall portion of the airbag cover is arranged on the outer peripheral side of the peripheral wall portion of the case and can be easily inserted into the locking hole of the connecting wall portion when assembled. An inclined guide surface is provided on the outer surface so that the lower end of the connecting wall portion to be pushed down can be guided by sliding to the outer peripheral side of the locking claw.

特開2000−326813号公報JP 2000-326813 A 特開2001−270412号公報JP 2001-270412 A

しかし、従来の合成樹脂製のケースの係止爪は、周壁部の上端から下方に向けて外開きに傾斜するように、案内面を配置させており、上端を周壁部自体の上端と一致(特許文献1参照)、あるいは、案内面の上端を周壁部自体の上端から離れた下方側に配置させていた。そのため、案内面に連結壁部の下端を当てる際、ケースの周壁部自体の上端の全周にわたる外周側に、エアバッグカバーの連結壁部の下端の内周側の全周を配置させる必要があり、組付時に連結壁部がずれて、係止爪の近傍の周壁部の上端に連結壁部の下端が当たれば、案内面に連結壁部の下端を当てることができなくなり、位置合わせに手間がかかることとなって、組付性に課題があった。特に、エアバッグカバーの天井壁部が、大きなインストルメントパネルから構成されていれば、天井壁部に邪魔されて、案内面や連結壁部の下端が目視し難く、既述の組付性の課題を助長してしまう。   However, the conventional claw of the synthetic resin case has a guide surface arranged so as to incline outward from the upper end of the peripheral wall portion, and the upper end coincides with the upper end of the peripheral wall portion itself ( In other words, the upper end of the guide surface is arranged on the lower side away from the upper end of the peripheral wall portion itself. Therefore, when the lower end of the connecting wall portion is applied to the guide surface, it is necessary to arrange the entire inner circumference side of the lower end of the connecting wall portion of the airbag cover on the outer peripheral side over the entire upper end of the peripheral wall portion of the case itself. Yes, if the connecting wall part is displaced during assembly and the lower end of the connecting wall part hits the upper end of the peripheral wall part near the locking claw, the lower end of the connecting wall part cannot be applied to the guide surface. It took time and effort, and there was a problem in assembling. In particular, if the ceiling wall part of the airbag cover is composed of a large instrument panel, it will be obstructed by the ceiling wall part, and it will be difficult to see the lower end of the guide surface and the connecting wall part. It encourages challenges.

また、係止爪には、エアバッグの膨張時、エアバッグカバーが扉部を開かせる際、上方への強い引張力が作用することから、インフレーターの出力が大きくなる等すれば、合成樹脂製の係止爪では、変形する虞れが発生する。   In addition, when the airbag cover is opened, when the airbag cover opens the door part, a strong tensile force acts on the latching claw. In this locking claw, there is a risk of deformation.

本発明は、上述の課題を解決するものであり、合成樹脂製のケースとエアバッグカバーとの組付性の向上とケースの係止爪の強度向上とを簡便な構成で容易に達成できるエアバッグ装置の製造方法とエアバッグ装置を提供することを目的とする。 The present invention solves the above-described problems, and an air that can be easily achieved with a simple configuration to improve the assembly of the synthetic resin case and the airbag cover and to improve the strength of the locking claws of the case. It is an object of the present invention to provide a method for manufacturing a bag device and an airbag device .

発明に係るエアバッグ装置の製造方法は、エアバッグ装置が、エアバッグと、該エアバッグに膨張用ガスを供給するインフレーターと、底壁部及び該底壁部の外周縁から上方に延びる略四角筒形状の周壁部を有して上方を開口させた略直方体形状とし、前記インフレーター及び折り畳まれた前記エアバッグを収納して保持するケースと、膨張時の前記エアバッグを突出可能として収納した前記エアバッグを覆う合成樹脂製のエアバッグカバーと、を備えて構成されるとともに、
前記エアバッグカバーが、収納された前記エアバッグを覆って、膨張時の前記エアバッグに押されて開く扉部を有した天井壁部と、前記扉部の周囲から下方に延びて前記ケースの前記周壁部の外周側に配置されるとともに前記周壁部に連結される略四角筒形状の連結壁部と、を備え、
前記周壁部の対向する一対の対向壁部が、それぞれ、前記連結壁部を係止可能に、外方へ突出する複数の係止爪を備え、
前記エアバッグカバーの前記連結壁部が、前記係止爪に係止可能に、前記係止爪を挿入させる複数の係止孔を備えて構成され
前記ケースと前記エアバッグカバーとの組付時、前記ケースの前記周壁部に対し、上方から前記エアバッグカバーの前記連結壁部を下方に押し下げて、前記エアバッグカバーの前記連結壁部を前記ケースの周壁部の外周側に配置させて、前記係止孔に挿入された前記係止爪に前記連結壁部を係止させるように組み付けて製造するエアバッグ装置の製造方法であって、
前記ケースが、合成樹脂製として構成され、
前記係止爪が、
前記対向壁部の上端から外方に延びて、係止時の前記係止孔の内周側に配置される首部と、
該首部の先端から下方に延びて、前記係止爪の前記係止孔からの外れを規制する係止片部と、
を備え、
前記係止爪の上面側に、前記対向壁部の対向方向に沿って延びる板状として、前記首部の上方への曲げを規制可能とし、かつ、前記エアバッグカバーの連結壁部を前記ケースの周壁部の外周側に配置させる組付時に、前記連結壁部の下端を前記係止爪における係止片部の外周側に案内可能な案内面を上面に設けた爪補強リブが、前記周壁部の上端より上方へ突出し、かつ、前記周壁部の内縁まで延びるように、配設されていることを特徴とする。
Substantially method of manufacturing an airbag apparatus according to the present invention, an airbag apparatus, extending the air bag, and the inflator supplies inflation gas to the airbag, from the outer peripheral edge of the bottom wall and the bottom wall portion upwardly It has a rectangular parallelepiped shape that has a rectangular cylindrical peripheral wall and opens upward, and stores and holds the inflator and the folded airbag, and stores the airbag when inflated so that it can protrude. And a synthetic resin airbag cover that covers the airbag ,
The airbag cover covers the stored airbag, and has a ceiling wall portion having a door portion that is pushed and opened by the airbag when inflated, and extends downward from the periphery of the door portion to extend the case. A substantially rectangular tube-shaped connecting wall portion disposed on the outer peripheral side of the peripheral wall portion and connected to the peripheral wall portion,
A pair of opposing wall portions opposed to the peripheral wall portion each include a plurality of locking claws protruding outward so as to be able to lock the connecting wall portion,
The connecting wall portion of the airbag cover is configured to include a plurality of locking holes for inserting the locking claws so as to be locked to the locking claws ,
When assembling the case and the airbag cover, the connecting wall portion of the airbag cover is pushed downward from above with respect to the peripheral wall portion of the case, and the connecting wall portion of the airbag cover is A method of manufacturing an airbag device that is disposed on the outer peripheral side of a peripheral wall portion of a case and is assembled and manufactured so as to lock the connecting wall portion to the locking claw inserted into the locking hole ;
The case is configured as a synthetic resin,
The locking claw is
A neck that extends outward from the upper end of the opposing wall and is disposed on the inner peripheral side of the locking hole at the time of locking;
A locking piece that extends downward from the tip of the neck and restricts the locking claw from coming off from the locking hole;
With
On the upper surface of the locking claw, as the opposing walls plate extending along the opposing direction of, and can restrict bending upward the neck, and a connecting wall portion of the airbag cover of the case A claw reinforcing rib provided with a guide surface on the top surface capable of guiding the lower end of the connecting wall portion to the outer peripheral side of the locking piece portion of the locking claw when assembled to be arranged on the outer peripheral side of the peripheral wall portion, It is arranged so as to protrude upward from the upper end of the wall and extend to the inner edge of the peripheral wall portion.

本発明に係るエアバッグ装置の製造方法では、ケースとエアバッグカバーとの組付時、ケースの周壁部に対して、上方からエアバッグカバーの連結壁部を下方に押し下げる。すると、連結壁部は、周壁部自体の上端より上方に突出した爪補強リブの案内面に対して、周壁部の上端に当たる前に、下端を当接させることとなって、さらに押し下げられれば、案内面に押し広げられて、下端を係止片部の外周側に配置させ、そして、係止孔内に係止片部と首部とを順次挿入させ、さらに、係止片部を連結壁部の外周側の係止孔周縁に配置させて、組付作業を完了させることができる。すなわち、エアバッグカバーのケースへの組付時、連結壁部の下端が案内面に当たり易いことから、組付性が良好となる。 In the method for manufacturing an airbag device according to the present invention, when the case and the airbag cover are assembled, the connecting wall portion of the airbag cover is pushed downward from above with respect to the peripheral wall portion of the case. Then, the connection wall part comes into contact with the lower end of the guide wall of the claw reinforcing rib protruding upward from the upper end of the peripheral wall part itself before it hits the upper end of the peripheral wall part. The lower end is arranged on the outer peripheral side of the locking piece portion, and is pushed into the guide surface, and the locking piece portion and the neck portion are sequentially inserted into the locking hole, and the locking piece portion is further connected to the connecting wall portion. As a result, the assembling operation can be completed. That is, when assembling the airbag cover to the case, the lower end of the connecting wall portion easily hits the guide surface, so that the assembling property is improved.

また、エアバッグの膨張時には、エアバッグが、天井壁部を上方へ向かって押圧して扉部を開かせることから、天井壁部とともに連結壁部も上方へ強く引っ張られて、係止孔の内周側に位置する係止爪の首部に、上方へ強い押圧力が作用する。しかし、爪補強リブが、周壁部の内縁まで延びるように配設されているため、首部の曲げ剛性が大きく、係止爪が首部の曲げを規制できるように強度を向上させている。そのため、係止爪は、首部に大きな上方への押圧力が作用しても、変形が抑制され、係止片部の係止孔からの外れを防止して、安定してエアバッグカバーを係止しておくことができる。   Further, when the airbag is inflated, the airbag presses the ceiling wall portion upward to open the door portion, so that the connection wall portion is also pulled upward together with the ceiling wall portion, and the locking hole A strong pressing force acts upward on the neck portion of the locking claw located on the inner peripheral side. However, since the claw reinforcing ribs are arranged so as to extend to the inner edge of the peripheral wall portion, the bending rigidity of the neck portion is large, and the strength is improved so that the locking claw can regulate the bending of the neck portion. Therefore, even if a large upward pressing force acts on the neck, the latching claw is restrained from being deformed, preventing the latching piece from coming off from the latching hole, and stably engaging the airbag cover. You can stop.

そして、本発明では、これらの組付性向上と係止爪の強度向上とを、係止爪の上面に設ける爪補強リブによって、容易に達成している。   And in this invention, these assembly | attachment improvement and the improvement of the intensity | strength of a latching claw are easily achieved by the nail | claw reinforcement rib provided in the upper surface of a latching claw.

したがって、本発明に係るエアバッグ装置の製造方法は、合成樹脂製のケースとエアバッグカバーとの組付性の向上とケースの係止爪の強度向上とを、所定の爪補強リブを設ける簡便な構成で、容易に達成することができる。
この製造方法に好適なエアバッグ装置としては、爪補強リブを、首部よりケースの内側方向にずれて配設された上端から、外方側に向かって、下がる傾斜とした上面、を設けて、周壁部の上端より上方へ突出し、かつ、周壁部の内縁まで延びるように、配設すれば、爪補強リブの上面における上端から外方に下がって傾斜する部位を、組付時の案内面として、好適に使用することができる。
Therefore, the manufacturing method of the airbag apparatus according to the present invention is a simple method of providing a predetermined nail reinforcing rib for improving the assembly of the synthetic resin case and the airbag cover and improving the strength of the locking claw of the case. This can be easily achieved with a simple configuration.
As an air bag device suitable for this manufacturing method, a claw reinforcing rib is provided with an upper surface that is inclined downward from the upper end arranged to be shifted inward of the case from the neck portion toward the outer side, If it is arranged so that it protrudes upward from the upper end of the peripheral wall part and extends to the inner edge of the peripheral wall part, a part inclined downward from the upper end on the upper surface of the claw reinforcing rib is used as a guide surface during assembly. Can be preferably used.

発明に係るエアバッグ装置の製造方法とエアバッグ装置では、前記係止爪が、一対の前記対向壁部の対向位置に、対応して配設され、
前記爪補強リブと平行に配置される帯状のケース補強リブが、前記ケースの曲げを規制可能に、対向して配置される一対の前記係止爪の配置位置相互を連結するように、前記ケースの周壁部と底壁部との外表面に、突設されていることが望ましい。
In the airbag device manufacturing method and the airbag device according to the present invention, the locking claws are disposed corresponding to the opposed positions of the pair of opposed wall portions,
The case in which the band-shaped case reinforcing ribs arranged in parallel with the claw reinforcing ribs connect the arrangement positions of the pair of engaging claws arranged opposite to each other so that bending of the case can be restricted. It is desirable to project from the outer surface of the peripheral wall portion and the bottom wall portion.

このような構成では、ケース補強リブが、周壁部の外表面側であるものの、爪補強リブに連なるように、配設されている。そのため、エアバッグの膨張時、係止爪の首部が、上方に強い引張力を受けて、周壁部を曲げようとしても、ケース補強リブが、その曲げ変形に対抗して、変形を防止でき、その結果、係止爪を変位させるような周壁部の曲げ変形も的確に防止できて、係止片部の係止孔からの外れを、一層、安定して防止することができる。   In such a configuration, the case reinforcing rib is disposed so as to be continuous with the claw reinforcing rib, although it is on the outer surface side of the peripheral wall portion. Therefore, when the airbag is inflated, the neck portion of the locking claw receives a strong tensile force upward, and even if it tries to bend the peripheral wall portion, the case reinforcing rib can resist the bending deformation and prevent the deformation, As a result, the bending deformation of the peripheral wall portion that displaces the locking claw can be accurately prevented, and the detachment of the locking piece portion from the locking hole can be prevented more stably.

発明に係るエアバッグ装置の製造方法とエアバッグ装置では、前記ケース補強リブが、一対の前記係止爪の配置位置相互を連結する爪延長方向リブの他に、該爪延長方向リブと直交する方向に配置される複数の爪直交方向リブを備えて構成されていることが望ましい。 In the airbag apparatus manufacturing method and the airbag apparatus according to the present invention, the case reinforcing rib is orthogonal to the claw extension direction rib in addition to the claw extension direction rib connecting the arrangement positions of the pair of locking claws. It is desirable to be provided with a plurality of claw orthogonal direction ribs arranged in the direction.

このような構成では、ケースの周壁部や底壁部が、格子状に配置されるケース補強リブの複数の爪延長方向リブと爪直交方向リブとにより、一層の剛性を確保でき、その結果、エアバッグの膨張時におけるケース自体の変形を的確に防止できて、係止爪を変位させるような周壁部や底壁部の曲げ変形を的確に防止でき、係止片部の係止孔からの抜けを、一層、安定して防止することができる。   In such a configuration, the peripheral wall portion and the bottom wall portion of the case can secure further rigidity by the plurality of claw extension direction ribs and the claw orthogonal direction ribs of the case reinforcing ribs arranged in a lattice shape, and as a result, It is possible to accurately prevent deformation of the case itself when the airbag is inflated, and to accurately prevent bending deformation of the peripheral wall portion and the bottom wall portion that displace the locking claws, and from the locking hole of the locking piece portion. Detachment can be prevented more stably.

発明に係るエアバッグ装置の製造方法とエアバッグ装置では、前記ケースの周壁部が、前記底壁部の上面側に連なる本体部と、前記本体部の上端における外周側の全周に配置される外側壁部と、前記本体部の外周側と前記外側壁部の内周側とを連結する連結リブと、を備えて構成され、
前記連結リブが、前記本体部と前記外側壁部との間を塞ぐように前記外側壁部の上下方向の中間付近に配置される横板部と、前記横板部の上下面で前記本体部から帯状に外方に延びて前記外側壁部に連なる上縦板部及び下縦板部を有してなる縦板部と、を備えて構成され、
前記連結リブの前記下縦板部が、前記爪延長方向リブ及び前記爪直交方向リブの上端部から形成され、
前記連結リブの前記上縦板部が、それぞれ、前記下縦板部の上方に重なるように配置されて、
前記爪補強リブが、前記上縦板部の上部から延設されて配設されていることが望ましい。
In the airbag apparatus manufacturing method and the airbag apparatus according to the present invention, the peripheral wall portion of the case is disposed on the entire periphery on the outer peripheral side at the upper end side of the main body portion and the main body portion connected to the upper surface side of the bottom wall portion. An outer wall part, and a connecting rib that connects the outer peripheral side of the main body part and the inner peripheral side of the outer wall part,
A horizontal plate portion disposed near the middle of the outer wall portion in the vertical direction so as to block the connection rib between the main body portion and the outer wall portion, and the main body portion at the upper and lower surfaces of the horizontal plate portion. A vertical plate portion having an upper vertical plate portion and a lower vertical plate portion extending outwardly in a band shape and continuing to the outer wall portion.
The lower vertical plate portion of the connecting rib is formed from upper ends of the claw extension direction rib and the claw orthogonal direction rib,
The upper vertical plate portions of the connecting ribs are respectively arranged so as to overlap above the lower vertical plate portions,
It is desirable that the claw reinforcing rib is disposed so as to extend from an upper portion of the upper vertical plate portion.

このような構成では、周壁部の上端が、連結リブにより連結された本体部の上端と外側壁部とから構成されており、連結リブが、横板部と縦板部とから構成されている。換言すれば、横板部の上下の縦板部の間が、肉盗み用凹部となって、ケースの軽量化を一層図ることができる。   In such a configuration, the upper end of the peripheral wall portion is constituted by the upper end of the main body portion and the outer wall portion connected by the connecting rib, and the connecting rib is constituted by the horizontal plate portion and the vertical plate portion. . In other words, the space between the upper and lower vertical plate portions of the horizontal plate portion becomes a meat stealing concave portion, and the case can be further reduced in weight.

勿論、このような肉盗み用凹部が設けられていても、連結リブの下縦板部が、爪延長方向リブ及び爪直交方向リブの上端部から形成され、連結リブの上縦板部が、それぞれ、下縦板部の上方に重なるように配置されて、さらに、爪補強リブが、上縦板部の上部から延設されて配設されているため、それぞれのリブが、格子状に連なって一致するように配設されることとなって、係止爪を含めたケースの全体の曲げ剛性が確保されることとなる。   Of course, even if such a meat stealing recess is provided, the lower vertical plate portion of the connecting rib is formed from the upper ends of the claw extension direction rib and the claw orthogonal direction rib, and the upper vertical plate portion of the connecting rib is Each of the ribs is arranged so as to overlap with the lower vertical plate part, and the claw reinforcing ribs are arranged so as to extend from the upper part of the upper vertical plate part. Therefore, the bending rigidity of the entire case including the locking claws is ensured.

発明に係るエアバッグ装置の製造方法とエアバッグ装置では、前記ケースの周壁部における前記一対の対向壁部の対向方向と直交方向で対向する側壁部相互に、前記エアバッグカバーと固着手段により連結可能に上下方向に貫通する連結孔を有したブラケット部が、外方に突設され、
該ブラケット部が、下面側の両縁に、それぞれ、前記爪直交方向リブから連なる帯状の支持補強リブを設けて、配設されていることが望ましい。
In the method of manufacturing an airbag device and the airbag device according to the present invention, the airbag cover and the fixing means are disposed between the side wall portions of the peripheral wall portion of the case facing each other in the direction orthogonal to the opposing direction of the pair of opposing wall portions. A bracket portion having a connecting hole penetrating in the vertical direction so as to be connectable is projected outward,
It is desirable that the bracket portion is provided with band-like support reinforcing ribs that are continuous from the ribs in the claw orthogonal direction on both edges on the lower surface side.

このような構成では、エアバッグカバーが、係止爪の係止による一対の対向壁部との連結の他に、ケースの側壁部から延びるブラケット部にも、固着手段を利用して、連結され、その結果、エアバッグカバーの天井壁部が、連結壁部を介在させる等して、扉部の周囲の四方を、係止爪や固着手段により、ケースの略四角筒形状の周壁部に連結されることとなり、エアバッグカバーの扉部が開く際、扉部の周囲の天井壁部が、上方へ移動し難くなって、扉部の開きを迅速に行うことができる。   In such a configuration, the airbag cover is connected to the bracket portion extending from the side wall portion of the case using the fixing means, in addition to the connection to the pair of opposing wall portions by the locking claws. As a result, the ceiling wall part of the airbag cover is connected to the peripheral wall part of the substantially rectangular tube shape of the case by the locking claw and the fixing means by interposing the connecting wall part. Thus, when the door portion of the airbag cover is opened, the ceiling wall portion around the door portion becomes difficult to move upward, and the door portion can be quickly opened.

勿論、ブラケット部は、ケースの周壁部や底壁部に配置される爪直交方向リブから連なる支持補強リブにより、補強されており、重量増加を招くことなく、強度が確保されている。   Of course, the bracket portion is reinforced by the support reinforcing ribs that are connected to the ribs in the claw orthogonal direction arranged on the peripheral wall portion and the bottom wall portion of the case, and the strength is ensured without increasing the weight.

本発明に係る一実施形態のエアバッグ装置の使用状態を示す車両の前後方向に沿った縦断面図である。1 is a longitudinal sectional view along the front-rear direction of a vehicle showing a use state of an airbag device according to an embodiment of the present invention. 実施形態のエアバッグ装置の使用状態を示す車両の左右方向に沿った縦断面図である。It is a longitudinal cross-sectional view along the left-right direction of the vehicle which shows the use condition of the airbag apparatus of embodiment. 実施形態のエアバッグ装置の構成部品を示す斜視図である。It is a perspective view which shows the component of the airbag apparatus of embodiment. 実施形態のエアバッグ装置に使用するケースの斜視図である。It is a perspective view of the case used for the airbag apparatus of embodiment. 実施形態のエアバッグ装置に使用するケースの正面図である。It is a front view of the case used for the airbag apparatus of an embodiment. 実施形態のエアバッグ装置に使用するケースの平面図である。It is a top view of the case used for the airbag apparatus of an embodiment. 実施形態のエアバッグ装置に使用するケースの底面図である。It is a bottom view of the case used for the airbag apparatus of an embodiment. 実施形態のエアバッグ装置に使用するケースの側面図である。It is a side view of the case used for the airbag apparatus of an embodiment. 実施形態のエアバッグ装置に使用するケースの部分縦断面図であり、それぞれ、図6のIXA−IXA部位、IXB−IXB部位、及び、IXC−IXC部位に対応する。It is a fragmentary longitudinal cross-sectional view of the case used for the airbag apparatus of embodiment, and respond | corresponds to the IXA-IXA site | part of FIG. 6, the IXB-IXB site | part, and the IXC-IXC site | part, respectively. 実施形態のエアバッグ装置におけるケースにエアバッグカバーを組み付ける状態を示す部分縦断面図である。It is a fragmentary longitudinal cross-section which shows the state which attaches an airbag cover to the case in the airbag apparatus of embodiment. 実施形態のエアバッグ装置におけるケースにエアバッグカバーを組み付ける状態を示す部分縦断面図であり、図10の後の状態を示す。It is a fragmentary longitudinal cross-sectional view which shows the state which attaches an airbag cover to the case in the airbag apparatus of embodiment, and shows the state after FIG.

以下、本発明の一実施形態を図面に基づいて説明すると、実施形態のエアバッグ装置Mは、図1,2に示すように、助手席前方のインストルメントパネル(以下、インパネと略す)1に配置される助手席用エアバッグ装置であり、折り畳まれたエアバッグ10と、エアバッグ10に膨張用ガスを供給するインフレーター18と、エアバッグ10及びインフレーター18を収納して保持するケース21と、エアバッグ10及びインフレーター18をケース21に取り付けるためのリテーナ13と、折り畳まれたエアバッグ10を覆うエアバッグカバー52と、エアバッグ装置Mを車両に固定するための取付ブラケット65と、を備えて構成されている。   DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, an airbag apparatus M according to an embodiment is attached to an instrument panel (hereinafter abbreviated as an instrument panel) 1 in front of a passenger seat. An airbag device for a passenger seat to be disposed; a folded airbag 10; an inflator 18 for supplying an inflation gas to the airbag 10; a case 21 for storing and holding the airbag 10 and the inflator 18; A retainer 13 for attaching the airbag 10 and the inflator 18 to the case 21, an airbag cover 52 for covering the folded airbag 10, and an attachment bracket 65 for fixing the airbag device M to the vehicle. It is configured.

なお、実施形態の場合、エアバッグカバー52は、インパネ1と一体的に形成されているが、インパネ1に所定の組付孔を開口させて、その開口部位に、インパネ1と別体としたエアバッグカバーを配設させてもよい。   In the case of the embodiment, the airbag cover 52 is formed integrally with the instrument panel 1, but a predetermined assembly hole is opened in the instrument panel 1, and the instrument panel 1 is separated from the opening part. An airbag cover may be provided.

また、本発明の上下の方向の基準は、エアバッグ装置Mのケース21を基準とし、後述する底壁部22の上下の方向と一致する。また、明細書での前後左右の方向は、エアバッグ装置Mを搭載する車両に対応して、後述する周壁部24の対向壁部25(25F,25B)の対向方向を前後方向として、対向壁部25Fを前側、対向壁部25Rを後側とし、周壁部24の側壁部26(26L,26R)の対向方向を左右方向として、側壁部26Lを左側、側壁部26Rを右側とするものである。   Moreover, the reference | standard of the up-down direction of this invention is based on the case 21 of the airbag apparatus M, and corresponds with the up-down direction of the bottom wall part 22 mentioned later. Further, the front-rear and left-right directions in the specification correspond to the vehicle on which the airbag apparatus M is mounted, and the opposite direction of the opposite wall 25 (25F, 25B) of the peripheral wall 24 described later is the opposite wall. The portion 25F is the front side, the opposing wall portion 25R is the rear side, the opposing direction of the side wall portions 26 (26L, 26R) of the peripheral wall portion 24 is the left-right direction, the side wall portion 26L is the left side, and the side wall portion 26R is the right side. .

エアバッグ10は、図1,2に示すように、下部に膨張用ガスを流入させる円形の開口10aを備えた袋状として、ポリエステルやポリアミド等の可撓性を有した織布から形成されている。開口10aの周縁11は、略四角環状のリテーナ13に押圧される部位となり、開口周縁11には、エアバッグ10をケース21の底壁部22に取り付けるための複数(実施形態では4個)の取付孔11aが形成されている。   As shown in FIGS. 1 and 2, the airbag 10 is formed from a flexible woven fabric such as polyester or polyamide as a bag shape having a circular opening 10 a for allowing inflation gas to flow into the lower portion thereof. Yes. A peripheral edge 11 of the opening 10a is a portion pressed by a substantially square annular retainer 13, and a plurality of (four in the embodiment) for attaching the airbag 10 to the bottom wall portion 22 of the case 21 are provided on the peripheral edge 11 of the opening. A mounting hole 11a is formed.

エアバッグ10をケース21に取り付けるリテーナ13は、板金製として、図1〜3に示すように、略四角環状の本体14を備えて構成されている。本体14は、中央に円形の開口を設けた略正方形板状の底壁部14aと、底壁部14aの縁から上方に延びる4つの縦壁部14bと、を備えるとともに、底壁部14aの四隅付近から下方にボルト15を突設させて構成されている。   The retainer 13 that attaches the airbag 10 to the case 21 is made of sheet metal and includes a substantially square annular main body 14 as shown in FIGS. The main body 14 includes a substantially square plate-like bottom wall portion 14a having a circular opening at the center, and four vertical wall portions 14b extending upward from the edge of the bottom wall portion 14a. Bolts 15 are provided so as to protrude downward from the vicinity of the four corners.

そして、リテーナ13は、各ボルト15をエアバッグ10の取付孔11aから突出させるようにエアバッグ10内に配置させて、各ボルト15をケース21の後述する貫通孔23aと、インフレーター18の後述するフランジ部20の取付孔20aと、さらに、取付ブラケット65の後述する貫通孔66aに挿通させ、各ボルト15にナット16を螺合させることにより、リテーナ13の底壁部14aが、エアバッグ10の開口周縁11、インフレーター18のフランジ部20、及び、取付ブラケット65、を、ケース21の底壁部22に取付固定している。   And the retainer 13 arrange | positions each bolt 15 in the airbag 10 so that it may protrude from the attachment hole 11a of the airbag 10, and each bolt 15 is mentioned later in the through-hole 23a of the case 21, and the inflator 18 mentions later. The bottom wall portion 14a of the retainer 13 is attached to the airbag 10 by inserting the nut 16 into each bolt 15 by inserting it into the mounting hole 20a of the flange portion 20 and a through-hole 66a to be described later of the mounting bracket 65. The opening periphery 11, the flange portion 20 of the inflator 18, and the mounting bracket 65 are fixedly attached to the bottom wall portion 22 of the case 21.

取付ブラケット65は、左右対称的な支持座66(66L,66R)と、左右の支持座66L,66Rを連結するU字状の支持アーム67と、を備えた板金製として、支持アーム67の中央にナット68を固着させて構成されている。取付ブラケット65は、インパネリインホース3から延びるブラケット5に対し、ナット68に螺合するボルト7を利用して、固定されるものであり、この固定により、エアバッグ装置Mが、車両に搭載されることとなる。   The mounting bracket 65 is made of sheet metal and includes a symmetrical support seat 66 (66L, 66R) and a U-shaped support arm 67 that connects the left and right support seats 66L, 66R. The nut 68 is fixed to the head. The mounting bracket 65 is fixed to the bracket 5 extending from the instrument panel hose 3 by using a bolt 7 screwed to the nut 68. By this fixing, the airbag device M is mounted on the vehicle. The Rukoto.

インフレーター18は、上部側にガス吐出口19aを設けた円柱状の本体部19と、本体部19の外周面に配設されたフランジ部20と、を備えて構成されている。フランジ部20には、ボルト15を挿通させる取付孔20aが配設されている。   The inflator 18 includes a columnar main body portion 19 provided with a gas discharge port 19 a on the upper side, and a flange portion 20 disposed on the outer peripheral surface of the main body portion 19. The flange portion 20 is provided with an attachment hole 20a through which the bolt 15 is inserted.

エアバッグカバー52は、ポリオレフィン系やポリエステル系の熱可塑性エラストマー等から形成され、実施形態の場合、インパネ1と一体的に形成されている。エアバッグカバー52は、ケース21に収納されたエアバッグ10を覆って、膨張時のエアバッグ10に押されて開く扉部54(54F,54B)を有した天井壁部53と、扉部54の周囲から下方に延びてケース21の後述する周壁部24の外周側に配置されるとともに周壁部24に連結される略四角筒形状の連結壁部58と、を備えて構成されている。   The airbag cover 52 is formed of a polyolefin-based or polyester-based thermoplastic elastomer or the like, and is integrally formed with the instrument panel 1 in the case of the embodiment. The airbag cover 52 covers the airbag 10 accommodated in the case 21 and has a ceiling wall portion 53 having a door portion 54 (54F, 54B) that is pushed and opened by the airbag 10 when inflated, and a door portion 54. And a connecting wall portion 58 having a substantially rectangular tube shape that is disposed on the outer peripheral side of the peripheral wall portion 24 described later of the case 21 and is connected to the peripheral wall portion 24.

扉部54F,54Bは、略長方形板状として、前後に配設され、前側の扉部54Fが、前縁側にヒンジ部55を配設させ、後側の扉部54Bが、後縁側にヒンジ部55を配設させ、さらに、それぞれ、周囲に、ヒンジ部55の部位を除いて、薄肉の破断予定部56を設けて配設されている。そのため、扉部54F,54Bは、膨張するエアバッグ10に押された際、破断予定部56を破断させて、それぞれ、前方と後方との両側に別れて開くこととなる。   The door portions 54F and 54B are substantially rectangular plate-like shapes, and are disposed on the front and rear sides, the front door portion 54F has a hinge portion 55 disposed on the front edge side, and the rear door portion 54B has a hinge portion on the rear edge side. 55, and a thin portion to be broken 56 is provided around the periphery of the hinge portion 55 except for the portion of the hinge portion 55. Therefore, when the door portions 54F and 54B are pushed by the inflating airbag 10, the planned breaking portion 56 is broken and opened separately on both the front and rear sides.

連結壁部58は、前後方向で対向する被係止壁部59(59F,59B)が、ケース21の後述する係止爪41に係止可能に、係止爪41を挿入させる複数の係止孔59aを備えて構成されている。各係止孔59aは、長方形の開口として前後方向に貫通され、前後の被係止壁部59F,59Bに、それぞれ、6個ずつ、左右方向に沿って並設されている。   The connecting wall portion 58 has a plurality of latches for inserting the latching claws 41 so that the latched wall portions 59 (59F, 59B) opposed in the front-rear direction can be latched to the latching claws 41 described later of the case 21. A hole 59a is provided. Each of the locking holes 59a penetrates in the front-rear direction as a rectangular opening, and is provided in parallel along the left-right direction by six on each of the front and rear locked wall portions 59F, 59B.

連結壁部58の左右方向で対向する部位は、固着壁部61(61L,61B)として、ケース21の後述するブラケット部48に固着される部位としている。左右の固着壁部61L,61Rには、それぞれ、左右方向から見てU字状とした帯状の締結座62が配設され、各締結座62の底壁62aには、固着手段としてのねじ(タッピングねじ)70を螺着させる締結孔62bが、上下方向に沿って貫通されている。   The part which opposes the connection wall part 58 in the left-right direction is a part fixed to a bracket part 48 described later of the case 21 as a fixing wall part 61 (61L, 61B). The left and right fixing wall portions 61L and 61R are respectively provided with belt-like fastening seats 62 that are U-shaped when viewed from the left-right direction, and screws (fixing means) are provided on the bottom wall 62a of each fastening seat 62. A fastening hole 62b for screwing a tapping screw 70 is penetrated along the vertical direction.

ケース21は、フィラー入りのポリプロピレンやポリアミド等の合成樹脂製として、射出成形により一体的に形成されており、図1〜4に示すように、左右方向に長い略長方形板状の底壁部22と、底壁部22の外周縁から上方に延びる略四角筒形状の周壁部24と、を有し、上方を開口させた略直方体形状として、インフレーター18と折り畳まれたエアバッグ10とを収納して保持している。   The case 21 is integrally formed by injection molding as a synthetic resin such as polypropylene or polyamide containing filler, and as shown in FIGS. 1 to 4, the bottom wall portion 22 has a substantially rectangular plate shape that is long in the left-right direction. And a substantially rectangular tube-shaped peripheral wall portion 24 that extends upward from the outer peripheral edge of the bottom wall portion 22 and accommodates the inflator 18 and the folded airbag 10 as a substantially rectangular parallelepiped shape that opens upward. Hold.

底壁部22は、図1,2,4,6,7に示すように、インフレーター18の本体部19を下方から挿入可能な円形に開口した挿通孔22aを備え、挿通孔22aの周縁を、エアバッグ10とインフレーター18とを保持するための取付座23として、この取付座23にリテーナ13のボルト15を貫通させる貫通孔23aを配設させている。   As shown in FIGS. 1, 2, 4, 6, and 7, the bottom wall portion 22 includes an insertion hole 22a that is opened in a circular shape into which the main body portion 19 of the inflator 18 can be inserted from below, and the periphery of the insertion hole 22a is As a mounting seat 23 for holding the airbag 10 and the inflator 18, a through hole 23 a through which the bolt 15 of the retainer 13 passes is provided in the mounting seat 23.

周壁部24は、図1,2,4〜9に示すように、前後方向で対向する一対の対向壁部25(25F,25B)と、左右方向で対向する一対の側壁部26(26L,26R)と、から構成されている。実施形態の場合、対向壁部25は、上下方向に沿って延びる平面部位が大きく、側壁部26は、下縁26b付近が底壁部22の左右の縁22b,22c付近ととともに、外方に向かって曲線状に徐々に立ち上がるように形成されて、上端26a付近で、上下方向に沿って配設されるように構成されている。   As shown in FIGS. 1, 2, 4 to 9, the peripheral wall portion 24 includes a pair of opposed wall portions 25 (25F, 25B) opposed in the front-rear direction and a pair of side wall portions 26 (26L, 26R) opposed in the left-right direction. ) And. In the case of the embodiment, the opposing wall portion 25 has a large planar portion extending along the vertical direction, and the side wall portion 26 has the lower edge 26b and the left and right edges 22b and 22c of the bottom wall portion 22 in the outward direction. It is formed so as to gradually rise in a curved shape, and is arranged along the vertical direction in the vicinity of the upper end 26a.

そのため、ケース21は、上方から見れば、略直方体形状とした上方の開口21bが左右方向に長い長方形状とし、正面視では、図2,5に示すように、底壁部22から大きなR形状の曲線状に側壁部26が立ち上がり、側面視では、図1,8,9に示すように、底壁部22の前後の縁22d,22eと下端25bとを小さなR形状で連ならせて、対向壁部25が上方へ平面状に立ち上がって、略直方体形状としている。   Therefore, when viewed from above, the case 21 has a substantially rectangular parallelepiped upper opening 21b having a long rectangular shape in the left-right direction. In front view, the case 21 has a large R shape from the bottom wall 22 as shown in FIGS. As shown in FIGS. 1, 8, and 9, the side walls 26 rise in a curved shape, and the front and rear edges 22 d and 22 e and the lower end 25 b of the bottom wall 22 are connected in a small R shape, as shown in FIGS. The opposing wall portion 25 rises upward in a planar shape to have a substantially rectangular parallelepiped shape.

そして、前後の対向壁部25(25F,25B)は、エアバッグカバー52の連結壁部58を係止可能に、外方へ突出する複数の係止爪41を備えて構成される。係止爪41は、各対向壁部25に6個ずつ形成され、それぞれ、対向壁部25F,25Bの対向方向、すなわち、前後方向で一致する位置に配設されている。各係止爪41は、対向壁部25の上端25aから前後方向に沿った外方に延びて、係止時の係止孔59aの内周側に配置される首部42と、首部42の先端から下方に延びて、係止爪41の係止孔59aからの外れを規制する係止片部43と、を備えて構成されている。   The front and rear opposing wall portions 25 (25F, 25B) are configured to include a plurality of locking claws 41 protruding outward so that the connecting wall portion 58 of the airbag cover 52 can be locked. Six locking claws 41 are formed on each opposing wall portion 25, and are arranged at positions that coincide with each other in the opposing direction of the opposing wall portions 25F and 25B, that is, in the front-rear direction. Each locking claw 41 extends outward from the upper end 25a of the opposing wall portion 25 in the front-rear direction, and is arranged on the inner peripheral side of the locking hole 59a at the time of locking, and the tip of the neck portion 42 And a locking piece 43 that extends downward from the locking claw 41 and restricts the locking claw 41 from coming off from the locking hole 59a.

そして、各係止爪41には、上面41a側の左右方向の中央に、対向壁部25の対向方向である前後方向に沿って延びる板状の爪補強リブ45が突設されている。爪補強リブ45は、首部42の上方への曲げを規制可能な厚さ寸法t(図6参照)として、外縁(周壁部24から離れる先端側の縁)45aを係止片部43の上端外周面43at側に連ならせ、内縁(周壁部24側となる元部側の縁)45bを周壁部24(対向壁部25)の内縁(上端内周面)24b側に連ならせて、周壁部24の上端24aより上方へ突出する略三角板形状としている(図8参照)。   Each latching claw 41 is provided with a plate-like claw reinforcing rib 45 extending in the front-rear direction, which is the opposing direction of the opposing wall portion 25, at the center in the left-right direction on the upper surface 41a side. The claw reinforcing rib 45 has a thickness dimension t (see FIG. 6) that can restrict the bending of the neck portion 42 upward, and an outer edge (edge on the front end side away from the peripheral wall portion 24) 45a. It is connected to the surface 43at side, and an inner edge (an edge on the original side that is the peripheral wall portion 24 side) 45b is connected to an inner edge (upper end inner peripheral surface) 24b side of the peripheral wall portion 24 (opposing wall portion 25), It has a substantially triangular plate shape that protrudes upward from the upper end 24a of the portion 24 (see FIG. 8).

これらの爪補強リブ45は、エアバッグカバー52の連結壁部58を周壁部24の外周側に配置させる組付時に、連結壁部58の被係止壁部59の下端59cを、係止片部43の外周面43a側に案内可能な案内面46bを、上面46に設けている。案内面46bは、外方に向かって下がる傾斜として、爪補強リブ45の上面46における上端(略三角板形状の頂部)46aから外方側に向かうエリアに配設されており、円弧状の上端46aは、首部42よりケース21の内側方向にずれて配設されている。   These claw reinforcing ribs 45 are provided on the lower end 59c of the locked wall portion 59 of the connecting wall portion 58 when the connecting wall portion 58 of the airbag cover 52 is disposed on the outer peripheral side of the peripheral wall portion 24. A guide surface 46 b that can be guided to the outer peripheral surface 43 a side of the portion 43 is provided on the upper surface 46. The guide surface 46b is disposed in an area extending outward from the upper end (substantially triangular plate-shaped top portion) 46a of the upper surface 46 of the claw reinforcing rib 45 as an inclination descending outward, and has an arcuate upper end 46a. Is arranged so as to be displaced from the neck portion 42 toward the inside of the case 21.

さらに、実施形態の場合、ケース21の外表面21a側には、図5〜7に示すように、ケース21の剛性を高めるように、複数のケース補強リブ37が形成されている。ケース補強リブ37は、前後方向に沿って、換言すれば、帯状の爪補強リブ45と平行に配置される爪延長方向リブ38と、左右方向に沿って、換言すれば、爪延長方向リブ38や爪補強リブ45と直交する方向に配置される爪直交方向リブ39と、を備えて構成されている。なお、実施形態の場合、爪延長方向リブ38は、前後方向に沿って6つ(6列)分、形成され、爪直交方向リブ39は、左右方向に沿って4つ(4列)分、形成されている。   Furthermore, in the case of the embodiment, as shown in FIGS. 5 to 7, a plurality of case reinforcing ribs 37 are formed on the outer surface 21 a side of the case 21 so as to increase the rigidity of the case 21. The case reinforcing ribs 37 are arranged along the front-rear direction, in other words, the claw extending direction ribs 38 arranged in parallel with the belt-like claw reinforcing ribs 45, and in other words, the claw extending direction ribs 38 along the left and right direction. And a claw orthogonal direction rib 39 arranged in a direction orthogonal to the claw reinforcing rib 45. In the case of the embodiment, the claw extending direction ribs 38 are formed in six (6 rows) along the front-rear direction, and the claw orthogonal direction ribs 39 are formed in four (4 rows) along the left-right direction. Is formed.

そして、実施形態の場合、爪延長方向リブ38は、対向して配置される一対の係止爪41の配置位置相互を連結するように、ケース21の周壁部24と底壁部22との外表面21aに、突設されている。   In the case of the embodiment, the claw extension direction ribs 38 are arranged on the outer sides of the peripheral wall portion 24 and the bottom wall portion 22 of the case 21 so as to connect the arrangement positions of the pair of locking claws 41 arranged opposite to each other. It protrudes from the surface 21a.

さらに、ケース21の周壁部24が、底壁部22の上面22fに連なる本体部28と、本体部28の上端28aにおける外周側の全周に配置される外側壁部29と、本体部28の外周側と外側壁部29の内周側とを連結する連結リブ31と、を備えて構成されている。   Further, the peripheral wall portion 24 of the case 21 includes a main body portion 28 that is continuous with the upper surface 22 f of the bottom wall portion 22, an outer wall portion 29 that is disposed on the entire outer periphery of the upper end 28 a of the main body portion 28, and the main body portion 28. The connecting rib 31 is configured to connect the outer peripheral side and the inner peripheral side of the outer wall portion 29.

連結リブ31は、本体部28と外側壁部29との間を塞ぐように外側壁部29の上下方向の中間付近に配置される横板部32と、横板部32の上下面で本体部28から帯状に外方に延びて外側壁部29に連なる上縦板部34及び下縦板部35とを有してなる縦板部33と、を備えて構成されている。実施形態の場合、横板部32は、底壁部22と略平行に配設されている。   The connecting rib 31 includes a horizontal plate portion 32 disposed near the middle in the vertical direction of the outer wall portion 29 so as to block between the main body portion 28 and the outer wall portion 29, and the main body portion on the upper and lower surfaces of the horizontal plate portion 32. A vertical plate portion 33 having an upper vertical plate portion 34 and a lower vertical plate portion 35 that extend outward from the belt 28 in a belt shape and continue to the outer wall portion 29. In the case of the embodiment, the horizontal plate portion 32 is disposed substantially parallel to the bottom wall portion 22.

そして、連結リブ31の下縦板部35が、爪延長方向リブ38と爪直交方向リブ39との上端部38a,39aから形成されている。   The lower vertical plate portion 35 of the connecting rib 31 is formed from upper end portions 38 a and 39 a of the claw extension direction rib 38 and the claw orthogonal direction rib 39.

また、連結リブ31の上縦板部34が、それぞれ、下縦板部35の上方に重なるように配置されている。すなわち、各上縦板部34は、ケース21の平面視で、下縦板部35と上下方向で重なるように配置されている。そして、爪補強リブ45は、各上縦板部34の上部から延設されて配設されている。   Further, the upper vertical plate portion 34 of the connecting rib 31 is disposed so as to overlap the lower vertical plate portion 35, respectively. That is, each upper vertical plate portion 34 is disposed so as to overlap with the lower vertical plate portion 35 in the vertical direction in a plan view of the case 21. And the nail | claw reinforcement rib 45 is extendedly provided from the upper part of each upper vertical board part 34, and is arrange | positioned.

さらに、ケース21の周壁部24における左右方向で対向する側壁部26相互には、上下方向に貫通する連結孔49aを有したブラケット部48が、外方に突設されている。ブラケット部48は、側壁部26の上端26aと面一として(図4,5参照)、左右方向の外方へ外側壁部29から突出する略長方形板状の固着片部49を備えて構成され、固着片部49は、エアバッグカバー52の連結壁部58の固着壁部61に対し、固着手段としてのねじ(タッピングねじ)70により連結されるものであり(図2参照)、ねじ70を挿通させる上下方向に貫通した連結孔49aを備えて構成されている。   Further, a bracket portion 48 having a connecting hole 49a penetrating in the up-down direction is provided projecting outward from the side wall portions 26 facing each other in the left-right direction in the peripheral wall portion 24 of the case 21. The bracket portion 48 is configured to have a substantially rectangular plate-shaped fixing piece portion 49 that is flush with the upper end 26a of the side wall portion 26 (see FIGS. 4 and 5) and protrudes from the outer wall portion 29 outward in the left-right direction. The fixing piece portion 49 is connected to the fixing wall portion 61 of the connecting wall portion 58 of the airbag cover 52 by a screw (tapping screw) 70 as fixing means (see FIG. 2). The connecting hole 49a penetrates in the vertical direction to be inserted.

固着片部49は、図5,7に示すように、下面側の前後の両縁に、それぞれ、帯状の支持補強リブ50を設けて、配設されている。これらの支持補強リブ50,50は、中央側で相互に隣接する2つの爪直交方向リブ39から連なって、構成されている。   As shown in FIGS. 5 and 7, the fixing piece portion 49 is provided with a belt-like support reinforcing rib 50 on each of the front and rear edges on the lower surface side. These support reinforcing ribs 50, 50 are formed by connecting two claw orthogonal direction ribs 39 adjacent to each other on the center side.

実施形態のエアバッグ装置Mの組み立ては、まず、各取付孔11aからボルト15を突出させるように、内部にリテーナ13を配設させた状態で、エアバッグ10を折り畳み、さらに、折り崩れしないように、折り畳んだエアバッグ10を、破断可能なラッピングシート9でくるんでおく(図3参照)。   In assembling the airbag apparatus M of the embodiment, first, the airbag 10 is folded with the retainer 13 disposed therein so that the bolts 15 protrude from the mounting holes 11a, and further, the airbag apparatus M is not collapsed. The folded airbag 10 is wrapped with a wrapping wrapping sheet 9 (see FIG. 3).

そして、各ボルト15を貫通孔23aから突出させつつ、折り畳んだエアバッグ10をケース21の底壁部22上に収納するとともに、インフレーター18の本体部19を、下方から挿通孔22aを経てケース21内に挿入させつつ、フランジ部20の各取付孔20aに底壁部22から突出している各ボルト15を挿通させ、さらに、取付ブラケット65の支持座66における貫通孔66aに、各ボルト15を挿通させ、そして、各ボルト15にナット16を締結すれば、ケース21に、エアバッグ10、インフレーター18、及び、取付ブラケット65を取付固定することができる。   The folded airbag 10 is housed on the bottom wall portion 22 of the case 21 with each bolt 15 protruding from the through-hole 23a, and the body portion 19 of the inflator 18 is passed through the insertion hole 22a from below to the case 21. The bolts 15 protruding from the bottom wall portion 22 are inserted into the mounting holes 20a of the flange portion 20 while being inserted into the flange portions 20, and the bolts 15 are inserted into the through holes 66a of the support seat 66 of the mounting bracket 65. If the nuts 16 are fastened to the respective bolts 15, the airbag 10, the inflator 18, and the mounting bracket 65 can be attached and fixed to the case 21.

その後、ケース21の周壁部24に対して、上方からエアバッグカバー52の連結壁部58を下方に押し下げ、連結壁部58の係止孔周縁59bを係止爪41に係止させて、ケース21にエアバッグカバー52を組み付ける。   Thereafter, the connecting wall portion 58 of the airbag cover 52 is pushed downward from above with respect to the peripheral wall portion 24 of the case 21, and the locking hole peripheral edge 59 b of the connecting wall portion 58 is locked to the locking claw 41. The airbag cover 52 is assembled to 21.

この時、図10に示すように、ケース21の周壁部24に対して、上方からエアバッグカバー52の連結壁部58を下方に押し下げる際、連結壁部58の被係止壁部59F,59Bは、周壁部24自体の上端24aより上方に突出した爪補強リブ45の案内面46bに対して、周壁部24の上端24aに当たる前に、下端59cを当接させることとなる。そのため、連結壁部58の被係止壁部59F,59Bは、さらに押し下げられれば、図11のAに示すように、案内面46bに押し広げられて、下端59cを係止片部43の外周面43a側に配置させ、そして、係止孔59a内に係止片部43と首部42とを順次挿入させ、さらに、図11のBに示すように、係止片部43を被係止壁部59F,59Bの外周側の係止孔周縁59bに配置させて、組付作業を完了させることができる。   At this time, as shown in FIG. 10, when the connecting wall portion 58 of the airbag cover 52 is pushed downward from above the peripheral wall portion 24 of the case 21, the locked wall portions 59 </ b> F and 59 </ b> B of the connecting wall portion 58. The lower end 59c is brought into contact with the guide surface 46b of the claw reinforcing rib 45 protruding upward from the upper end 24a of the peripheral wall portion 24 itself before it hits the upper end 24a of the peripheral wall portion 24. Therefore, if the locked wall portions 59F and 59B of the connecting wall portion 58 are further pushed down, they are pushed and spread on the guide surface 46b as shown in FIG. The locking piece portion 43 and the neck portion 42 are sequentially inserted into the locking hole 59a, and the locking piece portion 43 is inserted into the locked wall as shown in FIG. 11B. The assembling operation can be completed by disposing the portions 59F and 59B on the peripheral edge 59b on the outer peripheral side.

すなわち、実施形態の場合、エアバッグカバー52のケース21への組付時、連結壁部58における被係止壁部59F,59Bの下端59cが案内面46bに当たり易いことから、組付性が良好となる。   That is, in the case of the embodiment, when the airbag cover 52 is assembled to the case 21, the lower end 59c of the locked wall portions 59F and 59B in the connecting wall portion 58 is likely to hit the guide surface 46b, so that the assemblability is good. It becomes.

ついで、ねじ70を、連結孔49aを経て、締結孔62bに螺着させ、エアバッグカバー52の左右の締結座62をケース21の左右の各ブラケット部48に固着させれば、エアバッグ装置Mを組み立てることができる。   Next, if the screw 70 is screwed into the fastening hole 62b through the connecting hole 49a and the left and right fastening seats 62 of the airbag cover 52 are fixed to the left and right bracket portions 48 of the case 21, the airbag device M is secured. Can be assembled.

その後、取付ブラケット65のナット68にボルト7を螺合させて、インパネリインホース3からのブラケット5に取付ブラケット65を取付固定すれば、エアバッグ装置Mを車両に搭載することができる。   After that, if the bolt 7 is screwed into the nut 68 of the mounting bracket 65 and the mounting bracket 65 is mounted and fixed to the bracket 5 from the instrument panel in-hose 3, the airbag apparatus M can be mounted on the vehicle.

なお、この時、インパネ1の図示しない部位も、車体側の所定部位にボルトやクリップ等の固着手段を利用して、固定することとなる。   At this time, a part (not shown) of the instrument panel 1 is also fixed to a predetermined part on the vehicle body side by using fixing means such as a bolt or a clip.

また、上記の説明では、インパネ1からなるエアバッグカバー52をケース21に組み付けてから、エアバッグ装置Mを車両に搭載する場合を説明したが、ケース21にエアバッグ10、インフレーター18、及び、取付ブラケット65を取付固定してエアバッグ装置本体を組み立てておき、取付ブラケット65をボルト7止めして車体側に取り付ける際、ケース21にインパネ1からなるエアバッグカバー52を組み付けて、インパネ1の図示しない部位を車体側に組み付けて、エアバッグ装置Mの組み立てと略同時に、エアバッグ装置Mの車両への搭載作業を完了させるようにしてもよい。   In the above description, the case where the airbag device M is mounted on the vehicle after the airbag cover 52 made of the instrument panel 1 is assembled to the case 21 has been described. However, the airbag 10, the inflator 18, and When the mounting bracket 65 is mounted and fixed, the airbag apparatus main body is assembled, and when the mounting bracket 65 is fixed to the vehicle body side with the bolts 7 fixed, the airbag cover 52 including the instrument panel 1 is assembled to the case 21, and the instrument panel 1 A part (not shown) may be assembled on the vehicle body side, and the mounting operation of the airbag device M on the vehicle may be completed substantially simultaneously with the assembly of the airbag device M.

さらに、予め、車体側に取り付けておいたインパネ1のエアバッグカバー52を、エアバッグ装置本体のケース21に組み付けつつ、エアバッグ装置本体の取付ブラケット65を車両にボルト7止めしてもよい。なお、この場合は、ケース21の周壁部24を連結壁部58内に挿入させるように上昇させることとなり、エアバッグカバー52は、ケース21に対して、相対的な下方移動によって、係止されることとなる。   Further, the mounting bracket 65 of the airbag apparatus main body may be bolted to the vehicle with the bolt 7 while the airbag cover 52 of the instrument panel 1 previously attached to the vehicle body side is assembled to the case 21 of the airbag apparatus main body. In this case, the peripheral wall portion 24 of the case 21 is raised so as to be inserted into the connecting wall portion 58, and the airbag cover 52 is locked by the relative downward movement with respect to the case 21. The Rukoto.

車両へのエアバッグ装置Mの搭載完了後、インフレーター18のガス吐出口19aから膨張用ガスが吐出されれば、エアバッグ10が、膨張して、連結壁部58で囲まれた天井壁部53の部位を上方へ向かって押圧し、破断予定部56を破断させて、扉部54F,54Bを開かせ、助手席搭乗者の前方側へ大きく展開しつつ膨張し、そして、膨張を完了させることとなる。この時、エアバッグカバー52は、天井壁部53とともに連結壁部58も上方へ強く引っ張られて、係止孔59aの内周側に位置する各係止爪41の首部42に、上方へ強い押圧力F(図1,11参照)が作用する。しかし、各爪補強リブ45が、周壁部24の内縁24bまで延びるように配設されているため、首部42の曲げ剛性が大きく、係止爪41が首部42の曲げを規制できるように強度を向上させている。そのため、係止爪41は、首部42に大きな上方への押圧力Fが作用しても、変形が抑制され、係止片部43の係止孔59aからの外れを防止して、安定してエアバッグカバー52を係止しておくことができる。   If the inflation gas is discharged from the gas discharge port 19a of the inflator 18 after the installation of the airbag apparatus M to the vehicle is completed, the airbag 10 expands and the ceiling wall portion 53 surrounded by the connecting wall portion 58 is obtained. The upper part is pushed upward, the expected breakage part 56 is broken, the door parts 54F and 54B are opened, the front passenger's occupant is expanded while being expanded forward, and the expansion is completed. It becomes. At this time, the airbag cover 52 is strongly pulled upward together with the ceiling wall portion 53 and the connection wall portion 58 so that the airbag cover 52 is strong against the neck portion 42 of each locking claw 41 located on the inner peripheral side of the locking hole 59a. A pressing force F (see FIGS. 1 and 11) acts. However, since each claw reinforcing rib 45 is disposed so as to extend to the inner edge 24b of the peripheral wall portion 24, the neck portion 42 has a large bending rigidity, and the locking claw 41 has a strength so that the bending of the neck portion 42 can be restricted. It is improving. For this reason, the locking claw 41 is stably deformed even when a large upward pressing force F acts on the neck portion 42, preventing the locking piece portion 43 from coming off from the locking hole 59 a. The airbag cover 52 can be locked.

そして、実施形態では、エアバッグカバー52のケース21への組付性向上と係止爪41の強度向上とを、係止爪41の上面41aに設ける爪補強リブ45によって、容易に達成している。   In the embodiment, the assembly of the airbag cover 52 to the case 21 and the strength of the locking claw 41 are easily achieved by the claw reinforcing rib 45 provided on the upper surface 41a of the locking claw 41. Yes.

したがって、実施形態のエアバッグ装置Mは、合成樹脂製のケース21とエアバッグカバー52との組付性の向上とケース21の係止爪41の強度向上とを、所定の爪補強リブ45を設ける簡便な構成で、容易に達成することができる。   Therefore, the airbag apparatus M according to the embodiment improves the assembling property between the case 21 made of synthetic resin and the airbag cover 52 and improves the strength of the locking claw 41 of the case 21 with a predetermined claw reinforcing rib 45. This can be easily achieved with a simple configuration.

そして、実施形態では、係止爪41が、一対の対向壁部25F,25Bの前後の対向位置に、対応して配設されている。また、爪補強リブ45と平行に配置される帯状のケース補強リブ37の爪延長方向リブ38が、ケース21の曲げを規制可能に、対向して配置される一対の係止爪41の配置位置相互を連結するように、ケース21の周壁部24と底壁部22との外表面21aに、突設されている。なお、実施形態の場合、爪延長方向リブ38は、既述したように、6個の係止爪41の数に対応して、前後方向に延びるように、6つ形成されている。   And in embodiment, the latching claw 41 is arrange | positioned corresponding to the opposing position before and behind a pair of opposing wall part 25F, 25B. Further, the claw extending direction ribs 38 of the band-like case reinforcing ribs 37 arranged in parallel with the claw reinforcing ribs 45 are arranged so that the bending of the case 21 can be restricted, and the paired locking claws 41 are arranged to face each other. Projecting is provided on the outer surface 21 a of the peripheral wall portion 24 and the bottom wall portion 22 of the case 21 so as to connect each other. In the case of the embodiment, as described above, six claw extending direction ribs 38 are formed so as to extend in the front-rear direction corresponding to the number of the six locking claws 41.

すなわち、実施形態では、ケース補強リブ37の爪延長方向リブ38が、周壁部24の外表面側であるものの、爪補強リブ45に連なるように、配設されている。そのため、エアバッグ10の膨張時、係止爪41の首部42が、上方に強い引張力(押圧力)Fを受けて、周壁部24の対向壁部25を曲げようとしても、ケース補強リブ37の爪延長方向リブ38が、その曲げ変形に対抗して、変形を防止でき、その結果、係止爪41を変位させるような周壁部24の対向壁部25の曲げ変形も的確に防止できて、係止片部43の係止孔59aからの外れを、一層、安定して防止することができる。   That is, in the embodiment, the claw extending direction rib 38 of the case reinforcing rib 37 is disposed so as to be continuous with the claw reinforcing rib 45 although it is on the outer surface side of the peripheral wall portion 24. Therefore, when the airbag 10 is inflated, the neck portion 42 of the locking claw 41 receives a strong tensile force (pressing force) F upward and bends the opposing wall portion 25 of the peripheral wall portion 24. The claw extension direction rib 38 can prevent the deformation against the bending deformation, and as a result, the bending deformation of the opposing wall portion 25 of the peripheral wall portion 24 that displaces the locking claw 41 can be prevented appropriately. The detachment of the locking piece 43 from the locking hole 59a can be prevented more stably.

さらに、実施形態のエアバッグ装置Mでは、ケース補強リブ37が、一対の係止爪41の配置位置相互を連結する爪延長方向リブ38の他に、爪延長方向リブ38と直交する方向に配置される複数(実施形態では4つ)の爪直交方向リブ39を備えて構成されている。   Furthermore, in the airbag apparatus M of the embodiment, the case reinforcing rib 37 is arranged in a direction orthogonal to the claw extension direction rib 38 in addition to the claw extension direction rib 38 that connects the arrangement positions of the pair of locking claws 41. A plurality of (four in the embodiment) nail orthogonal direction ribs 39 are provided.

そのため、実施形態では、ケース21の周壁部24や底壁部22が、格子状に配置されるケース補強リブ37の複数の爪延長方向リブ38と爪直交方向リブ39とにより、一層の剛性を確保でき、その結果、エアバッグ10の膨張時におけるケース21自体の変形を的確に防止できて、係止爪41を変位させるような周壁部24や底壁部22の曲げ変形を的確に防止でき、係止片部43の係止孔59aからの抜けを、一層、安定して防止することができる。   Therefore, in the embodiment, the peripheral wall portion 24 and the bottom wall portion 22 of the case 21 are provided with further rigidity by the plurality of claw extension direction ribs 38 and the claw orthogonal direction ribs 39 of the case reinforcing ribs 37 arranged in a lattice shape. As a result, deformation of the case 21 itself when the airbag 10 is inflated can be accurately prevented, and bending deformation of the peripheral wall portion 24 and the bottom wall portion 22 that can displace the locking claws 41 can be prevented accurately. Further, it is possible to more stably prevent the locking piece 43 from coming off from the locking hole 59a.

さらにまた、実施形態では、ケース21の周壁部24が、底壁部22の上面22fに連なる本体部28と、本体部28の上端28aにおける外周側の全周に配置される外側壁部29と、本体部28の外周側と外側壁部29の内周側とを連結する連結リブ31と、を備えて構成されている。連結リブ31は、本体部28と外側壁部29との間を塞ぐように外側壁部29の上下方向の中間付近に配置される横板部32と、横板部32の上下面で本体部28から帯状に外方に延びて外側壁部29に連なる上縦板部34及び下縦板部35を有してなる縦板部33と、を備えて構成される。そして、連結リブ31の下縦板部35が、爪延長方向リブ38及び爪直交方向リブ39の上端部38a,39aから形成され、連結リブ31の上縦板部34が、それぞれ、下縦板部35の上方に重なるように配置されていて、爪補強リブ45が、上縦板部34の上部から延設されて配設されている。   Furthermore, in the embodiment, the peripheral wall portion 24 of the case 21 includes a main body portion 28 that is continuous with the upper surface 22f of the bottom wall portion 22, and an outer wall portion 29 that is disposed on the entire outer periphery of the upper end 28a of the main body portion 28. The connecting rib 31 is configured to connect the outer peripheral side of the main body 28 and the inner peripheral side of the outer wall portion 29. The connecting rib 31 includes a horizontal plate portion 32 disposed near the middle in the vertical direction of the outer wall portion 29 so as to block between the main body portion 28 and the outer wall portion 29, and the main body portion on the upper and lower surfaces of the horizontal plate portion 32. A vertical plate portion 33 having an upper vertical plate portion 34 and a lower vertical plate portion 35 extending outward from the belt 28 in a band shape and continuing to the outer wall portion 29. And the lower vertical board part 35 of the connection rib 31 is formed from the upper end parts 38a and 39a of the nail extension direction rib 38 and the nail orthogonal direction rib 39, and the upper vertical board part 34 of the connection rib 31 is a lower vertical board, respectively. The claw reinforcing ribs 45 are disposed so as to overlap above the portion 35, and are extended from the upper portion of the upper vertical plate portion 34.

そのため、実施形態では、周壁部24の上端24aが、連結リブ31により連結された本体部28の上端28aと外側壁部29とから構成されており、連結リブ31が、横板部32と縦板部33とから構成されている。換言すれば、横板部32の上下の縦板部33の間が、肉盗み用凹部36(36U,36D)(図4〜7参照)となって、ケース21の軽量化を一層図ることができる。   Therefore, in the embodiment, the upper end 24 a of the peripheral wall portion 24 is configured by the upper end 28 a of the main body portion 28 connected by the connecting rib 31 and the outer wall portion 29, and the connecting rib 31 is vertically connected to the horizontal plate portion 32. It is comprised from the board part 33. FIG. In other words, the portion between the upper and lower vertical plate portions 33 of the horizontal plate portion 32 becomes the meat stealing recess 36 (36U, 36D) (see FIGS. 4 to 7), and the weight of the case 21 can be further reduced. it can.

勿論、このような肉盗み用凹部36が設けられていても、連結リブ31の下縦板部35が、爪延長方向リブ38及び爪直交方向リブ39の上端部38a,39aから形成され、連結リブ31の上縦板部34が、それぞれ、下縦板部35の上方に重なるように配置されて、さらに、爪補強リブ45が、上縦板部34の上部から延設されて配設されているため、それぞれのリブ38,39,34,35,45が、格子状に連なって一致するように配設されることとなって、係止爪41を含めたケース21の全体の曲げ剛性が確保されることとなる。   Of course, even if such a meat stealing recess 36 is provided, the lower vertical plate portion 35 of the connecting rib 31 is formed from the upper end portions 38a, 39a of the claw extending direction rib 38 and the claw orthogonal direction rib 39, and connected. The upper vertical plate portion 34 of the rib 31 is disposed so as to overlap the upper portion of the lower vertical plate portion 35, and the claw reinforcing rib 45 is disposed so as to extend from the upper portion of the upper vertical plate portion 34. Therefore, the ribs 38, 39, 34, 35, 45 are arranged so as to be aligned in a lattice shape, and the entire bending rigidity of the case 21 including the locking claws 41 is arranged. Will be secured.

さらに、実施形態では、ケース21の周壁部24における一対の対向壁部25の対向方向と直交方向で対向する側壁部26相互に、エアバッグカバー52の連結壁部58の固着壁部61と、ねじ70により連結可能に上下方向に貫通する連結孔49aを有したブラケット部48が、外方に突設され、ブラケット部48が、下面側の両縁に、それぞれ、爪直交方向リブ39,39から連なる帯状の支持補強リブ50を設けて、配設されている。   Furthermore, in the embodiment, the fixing wall portion 61 of the connecting wall portion 58 of the airbag cover 52, the side wall portions 26 facing each other in the direction orthogonal to the opposing direction of the pair of opposing wall portions 25 in the peripheral wall portion 24 of the case 21, A bracket portion 48 having a connecting hole 49a penetrating in the vertical direction so as to be connectable by a screw 70 is provided to project outward, and the bracket portion 48 is provided on both edges on the lower surface side of the claw orthogonal direction ribs 39, 39, respectively. A belt-like support reinforcing rib 50 is provided and arranged.

そのため、実施形態では、エアバッグカバー52が、係止爪41の係止による一対の対向壁部25との連結の他に、ケース21の側壁部26から延びるブラケット部48にも、固着手段としてのねじ70を利用して、連結され、その結果、エアバッグカバー52の天井壁部53が、連結壁部58の被係止壁部59や固着壁部61を介在させて、扉部54の周囲の四方を、係止爪41や固着手段としてのねじ70により、ケース21の略四角筒形状の周壁部24に連結されることとなり、エアバッグカバー52の扉部54が開く際、扉部54の周囲の天井壁部53が、上方へ移動し難くなって、破断予定部56を破断させて開く扉部54の開きを迅速に行うことができる。   Therefore, in the embodiment, the airbag cover 52 is also connected to the bracket portion 48 extending from the side wall portion 26 of the case 21 as a fixing means in addition to the connection with the pair of opposing wall portions 25 by the locking claw 41 locking. As a result, the ceiling wall portion 53 of the airbag cover 52 is connected to the door portion 54 with the locked wall portion 59 and the fixing wall portion 61 of the connecting wall portion 58 interposed therebetween. The surrounding four sides are connected to the substantially square cylindrical peripheral wall portion 24 of the case 21 by the locking claw 41 and the screw 70 as the fixing means, and the door portion is opened when the door portion 54 of the airbag cover 52 is opened. The ceiling wall 53 around 54 becomes difficult to move upward, and the door 54 can be opened quickly by breaking the planned break portion 56.

勿論、ブラケット部48は、ケース21の周壁部24や底壁部22に配置される爪直交方向リブ39から連なる支持補強リブ50により、補強されており、重量増加を招くことなく、強度が確保されている。   Of course, the bracket portion 48 is reinforced by the supporting and reinforcing ribs 50 connected to the claw orthogonal direction ribs 39 arranged on the peripheral wall portion 24 and the bottom wall portion 22 of the case 21, and the strength is ensured without increasing the weight. Has been.

なお、実施形態では、ブラケット部48に固着されるエアバッグカバー52の締結座62が、エアバッグカバー52に連結壁部58における左右方向の部位を固着壁部61として、それらの固着壁部61L,61Rに配設される場合について説明したが、連結壁部58から離れた天井壁部53から延びるように、締結座62を設けてもよい。   In the embodiment, the fastening seat 62 of the airbag cover 52 that is fixed to the bracket portion 48 uses the fixing wall portion 61 as a fixing wall portion 61 in the left and right portions of the connecting wall portion 58 of the airbag cover 52. However, the fastening seat 62 may be provided so as to extend from the ceiling wall portion 53 away from the connecting wall portion 58.

また、実施形態では、扉部54のヒンジ部55の配置される側を前後の縁側に対応させて、ケース21の前後方向で対向する対向壁部25に、係止爪41を配設する場合を示したが、扉部54のヒンジ部55の配置される側が、扉部54の左右方向の縁側とする場合には、エアバッグカバー52側の係止孔59aを設ける被係止壁部59を対応させて、左右方向で対向する部位の対向壁部相互に、係止爪41を配設することが望ましい。勿論、ヒンジ部の配置される方向に無関係に、係止爪を設ける対向壁部を設定してもよい。   Further, in the embodiment, when the locking claw 41 is disposed on the opposing wall portion 25 facing in the front-rear direction of the case 21 with the side where the hinge portion 55 of the door portion 54 is disposed corresponding to the front-rear edge side. However, when the side of the door portion 54 on which the hinge portion 55 is disposed is the edge side in the left-right direction of the door portion 54, the locked wall portion 59 provided with the locking hole 59 a on the airbag cover 52 side. It is desirable to dispose the locking claws 41 between the opposing wall portions of the portions facing each other in the left-right direction. Of course, you may set the opposing wall part which provides a latching claw irrespective of the direction where a hinge part is arrange | positioned.

さらに、ブラケット部48を設けない場合には、略四角筒形状の周壁部24の例えば前後左右で対向する二対の壁部に、それぞれ、係止爪を配置させて、エアバッグカバー52側の略四角筒形状の連結壁部58に、係止爪に対向する係止孔を設けてもよい。ちなみに、この場合には、組付時に、連結壁部58の対向する壁部相互が、爪補強リブ45の案内面46bに案内されて、四方に拡開し易いように、隣接する壁部間にスリット等を設けることが望ましい。   Further, when the bracket portion 48 is not provided, locking claws are respectively disposed on, for example, two pairs of wall portions facing the front, rear, left, and right of the substantially square cylindrical peripheral wall portion 24 so that the airbag cover 52 side is provided. A locking hole facing the locking claw may be provided in the connection wall portion 58 having a substantially rectangular tube shape. Incidentally, in this case, at the time of assembly, the opposing wall portions of the connecting wall portion 58 are guided by the guide surface 46b of the claw reinforcing rib 45 so that they are easily expanded in four directions. It is desirable to provide a slit or the like.

また、実施形態では、助手席用のエアバッグ装置Mについて説明したが、本発明は、助手席用のエアバッグ装置に限定されるものでなく、合成樹脂製のケースに、ケース側に設けた係止爪を利用して、合成樹脂製のエアバッグカバーを係止させて組み付ける構成のエアバッグ装置であれば、運転席用のエアバッグ装置等に本発明を適用してもよい。   Further, in the embodiment, the airbag device M for the passenger seat has been described. However, the present invention is not limited to the airbag device for the passenger seat, and is provided on the case side in a synthetic resin case. The present invention may be applied to an air bag device for a driver's seat or the like as long as the air bag device is configured to lock and assemble an air bag cover made of synthetic resin by using the locking claws.

10…エアバッグ、18…インフレーター、
21…ケース、21a…外表面、21b…開口、22…底壁部、24…周壁部、25(25F,25B)…対向壁部、26(26L,26R)…側壁部、28…本体部、29…外側壁部、31…連結リブ、32…横板部、33…縦板部、34…上縦板部、35…下縦板部、36(36U,36D)…肉盗み用凹部、37…ケース補強リブ、38…爪延長方向リブ、38a…上端部、39…爪直交方向リブ、39a…上端部、
41…係止爪、41a…上面、42…首部、43…係止片部、43a…外周面、43at…上端外周面、
45…爪補強リブ、45a…外縁、45b…内縁、46…上面、46b…案内面、
48…ブラケット部、49a…連結孔、50…支持補強リブ、
52…エアバッグカバー、53…天井壁部、54(54F,54B)…扉部、58…連結壁部、59a…係止孔、59c…下端、
70…(固着手段・タッピングねじ)ねじ、
M…(助手席用)エアバッグ装置。
10 ... Airbag, 18 ... Inflator,
21 ... Case, 21a ... Outer surface, 21b ... Opening, 22 ... Bottom wall part, 24 ... Peripheral wall part, 25 (25F, 25B) ... Opposite wall part, 26 (26L, 26R) ... Side wall part, 28 ... Main body part, 29 ... Outer wall portion, 31 ... Connecting rib, 32 ... Horizontal plate portion, 33 ... Vertical plate portion, 34 ... Upper vertical plate portion, 35 ... Lower vertical plate portion, 36 (36U, 36D) ... Meat stealing recess, 37 ... case reinforcing rib, 38 ... claw extension direction rib, 38a ... upper end, 39 ... claw orthogonal direction rib, 39a ... upper end,
41 ... locking claw, 41a ... upper surface, 42 ... neck, 43 ... locking piece, 43a ... outer peripheral surface, 43at ... upper end outer peripheral surface,
45 ... nail reinforcement ribs, 45a ... outer edge, 45b ... inner edge, 46 ... upper surface, 46b ... guide surface,
48 ... Bracket part, 49a ... Connection hole, 50 ... Supporting reinforcement rib,
52 ... Airbag cover, 53 ... Ceiling wall part, 54 (54F, 54B) ... Door part, 58 ... Connecting wall part, 59a ... Locking hole, 59c ... Lower end,
70 ... (fixing means / tapping screw) screw,
M ... (for passenger seat) Airbag device.

Claims (10)

エアバッグ装置が、エアバッグと、該エアバッグに膨張用ガスを供給するインフレーターと、底壁部及び該底壁部の外周縁から上方に延びる略四角筒形状の周壁部を有して上方を開口させた略直方体形状とし、前記インフレーター及び折り畳まれた前記エアバッグを収納して保持するケースと、膨張時の前記エアバッグを突出可能として収納した前記エアバッグを覆う合成樹脂製のエアバッグカバーと、を備えて構成されるとともに、
前記エアバッグカバーが、収納された前記エアバッグを覆って、膨張時の前記エアバッグに押されて開く扉部を有した天井壁部と、前記扉部の周囲から下方に延びて前記ケースの前記周壁部の外周側に配置されるとともに前記周壁部に連結される略四角筒形状の連結壁部と、を備え、
前記周壁部の対向する一対の対向壁部が、それぞれ、前記連結壁部を係止可能に、外方へ突出する複数の係止爪を備え、
前記エアバッグカバーの前記連結壁部が、前記係止爪に係止可能に、前記係止爪を挿入させる複数の係止孔を備えて構成され
前記ケースと前記エアバッグカバーとの組付時、前記ケースの前記周壁部に対し、上方から前記エアバッグカバーの前記連結壁部を下方に押し下げて、前記エアバッグカバーの前記連結壁部を前記ケースの周壁部の外周側に配置させて、前記係止孔に挿入された前記係止爪に前記連結壁部を係止させるように組み付けて製造するエアバッグ装置の製造方法であって、
前記ケースが、合成樹脂製として構成され、
前記係止爪が、
前記対向壁部の上端から外方に延びて、係止時の前記係止孔の内周側に配置される首部と、
該首部の先端から下方に延びて、前記係止爪の前記係止孔からの外れを規制する係止片部と、
を備え、
前記係止爪の上面側に、前記対向壁部の対向方向に沿って延びる板状として、前記首部の上方への曲げを規制可能とし、かつ、前記エアバッグカバーの連結壁部を前記ケースの周壁部の外周側に配置させる組付時に、前記連結壁部の下端を前記係止爪における係止片部の外周側に案内可能な案内面を上面に設けた爪補強リブが、前記周壁部の上端より上方へ突出し、かつ、前記周壁部の内縁まで延びるように、配設されていることを特徴とするエアバッグ装置の製造方法。
An airbag device has an airbag, an inflator that supplies inflation gas to the airbag, a bottom wall portion, and a substantially square cylindrical peripheral wall portion that extends upward from the outer peripheral edge of the bottom wall portion. A case that holds and holds the inflator and the folded airbag, and a synthetic resin airbag cover that covers the airbag that is capable of projecting the airbag when inflated. And configured with,
The airbag cover covers the stored airbag, and has a ceiling wall portion having a door portion that is pushed and opened by the airbag when inflated, and extends downward from the periphery of the door portion to extend the case. A substantially rectangular tube-shaped connecting wall portion disposed on the outer peripheral side of the peripheral wall portion and connected to the peripheral wall portion,
A pair of opposing wall portions opposed to the peripheral wall portion each include a plurality of locking claws protruding outward so as to be able to lock the connecting wall portion,
The connecting wall portion of the airbag cover is configured to include a plurality of locking holes for inserting the locking claws so as to be locked to the locking claws ,
When assembling the case and the airbag cover, the connecting wall portion of the airbag cover is pushed downward from above with respect to the peripheral wall portion of the case, and the connecting wall portion of the airbag cover is A method of manufacturing an airbag device that is disposed on the outer peripheral side of a peripheral wall portion of a case and is assembled and manufactured so as to lock the connecting wall portion to the locking claw inserted into the locking hole ;
The case is configured as a synthetic resin,
The locking claw is
A neck that extends outward from the upper end of the opposing wall and is disposed on the inner peripheral side of the locking hole at the time of locking;
A locking piece that extends downward from the tip of the neck and restricts the locking claw from coming off from the locking hole;
With
On the upper surface of the locking claw, as the opposing walls plate extending along the opposing direction of, and can restrict bending upward the neck, and a connecting wall portion of the airbag cover of the case A claw reinforcing rib provided with a guide surface on the top surface capable of guiding the lower end of the connecting wall portion to the outer peripheral side of the locking piece portion of the locking claw when assembled to be arranged on the outer peripheral side of the peripheral wall portion, A method for manufacturing an airbag device , wherein the airbag device is disposed so as to protrude upward from an upper end of the airbag and extend to an inner edge of the peripheral wall portion .
前記係止爪が、一対の前記対向壁部の対向位置に、対応して配設され、
前記爪補強リブと平行に配置される帯状のケース補強リブが、前記ケースの曲げを規制可能に、対向して配置される一対の前記係止爪の配置位置相互を連結するように、前記ケースの周壁部と底壁部との外表面に、突設されていることを特徴とする請求項1に記載のエアバッグ装置の製造方法
The locking claws are disposed corresponding to the opposing positions of the pair of opposing wall portions,
The case in which the band-shaped case reinforcing ribs arranged in parallel with the claw reinforcing ribs connect the arrangement positions of the pair of engaging claws arranged opposite to each other so that bending of the case can be restricted. The method for manufacturing an airbag device according to claim 1, wherein the airbag device is protruded from outer surfaces of the peripheral wall portion and the bottom wall portion.
前記ケース補強リブが、一対の前記係止爪の配置位置相互を連結する爪延長方向リブの他に、該爪延長方向リブと直交する方向に配置される複数の爪直交方向リブを備えて構成されていることを特徴とする請求項2に記載のエアバッグ装置の製造方法The case reinforcing rib includes a plurality of claw orthogonal ribs arranged in a direction orthogonal to the claw extending direction rib in addition to the claw extending direction rib connecting the arrangement positions of the pair of locking claws. The manufacturing method of the airbag apparatus of Claim 2 characterized by the above-mentioned. 前記ケースの周壁部が、前記底壁部の上面側に連なる本体部と、前記本体部の上端における外周側の全周に配置される外側壁部と、前記本体部の外周側と前記外側壁部の内周側とを連結する連結リブと、を備えて構成され、
前記連結リブが、前記本体部と前記外側壁部との間を塞ぐように前記外側壁部の上下方向の中間付近に配置される横板部と、前記横板部の上下面で前記本体部から帯状に外方に延びて前記外側壁部に連なる上縦板部及び下縦板部を有してなる縦板部と、を備えて構成され、
前記連結リブの前記下縦板部が、前記爪延長方向リブ及び前記爪直交方向リブの上端部から形成され、
前記連結リブの前記上縦板部が、それぞれ、前記下縦板部の上方に重なるように配置されて、
前記爪補強リブが、前記上縦板部の上部から延設されて配設されていることを特徴とする請求項3に記載のエアバッグ装置の製造方法
A peripheral wall portion of the case includes a main body portion that is continuous with the upper surface side of the bottom wall portion, an outer wall portion that is disposed on the entire outer periphery of the upper end of the main body portion, an outer peripheral side of the main body portion, and the outer wall. A connecting rib that connects the inner peripheral side of the part,
A horizontal plate portion disposed near the middle of the outer wall portion in the vertical direction so as to block the connection rib between the main body portion and the outer wall portion, and the main body portion at the upper and lower surfaces of the horizontal plate portion. A vertical plate portion having an upper vertical plate portion and a lower vertical plate portion extending outwardly in a band shape and continuing to the outer wall portion.
The lower vertical plate portion of the connecting rib is formed from upper ends of the claw extension direction rib and the claw orthogonal direction rib,
The upper vertical plate portions of the connecting ribs are respectively arranged so as to overlap above the lower vertical plate portions,
The method for manufacturing an airbag device according to claim 3, wherein the claw reinforcing rib is provided so as to extend from an upper portion of the upper vertical plate portion.
前記ケースの周壁部における前記一対の対向壁部の対向方向と直交方向で対向する側壁部相互に、前記エアバッグカバーと固着手段により連結可能に上下方向に貫通する連結孔を有したブラケット部が、外方に突設され、
該ブラケット部が、下面側の両縁に、それぞれ、前記爪直交方向リブから連なる帯状の支持補強リブを設けて、配設されていることを特徴とする請求項3若しくは請求項4に記載のエアバッグ装置の製造方法
A bracket portion having a connecting hole penetrating in a vertical direction so as to be connectable by the air bag cover and the fixing means between the side wall portions facing each other in the direction orthogonal to the opposing direction of the pair of opposing wall portions in the peripheral wall portion of the case. , Projecting outward,
5. The bracket according to claim 3, wherein the bracket portion is provided on both edges on the lower surface side by providing band-like support reinforcing ribs continuous from the ribs in the claw orthogonal direction. Manufacturing method of airbag apparatus.
エアバッグと、該エアバッグに膨張用ガスを供給するインフレーターと、底壁部及び該底壁部の外周縁から上方に延びる略四角筒形状の周壁部を有して上方を開口させた略直方体形状とし、前記インフレーター及び折り畳まれた前記エアバッグを収納して保持するケースと、膨張時の前記エアバッグを突出可能として収納した前記エアバッグを覆う合成樹脂製のエアバッグカバーと、を備え、
前記エアバッグカバーが、収納された前記エアバッグを覆って、膨張時の前記エアバッグに押されて開く扉部を有した天井壁部と、前記扉部の周囲から下方に延びて前記ケースの前記周壁部の外周側に配置されるとともに前記周壁部に連結される略四角筒形状の連結壁部と、を備え、
前記周壁部の対向する一対の対向壁部が、それぞれ、前記連結壁部を係止可能に、外方へ突出する複数の係止爪を備え、
前記エアバッグカバーの前記連結壁部が、前記係止爪に係止可能に、前記係止爪を挿入させる複数の係止孔を備えて構成されるエアバッグ装置であって、
前記ケースが、合成樹脂製として構成され、
前記係止爪が、
前記対向壁部の上端から外方に延びて、係止時の前記係止孔の内周側に配置される首部と、
該首部の先端から下方に延びて、前記係止爪の前記係止孔からの外れを規制する係止片部と、
を備え、
上面側に、前記対向壁部の対向方向に沿って延びる板状として、前記首部の上方への曲げを規制可能な爪補強リブを、配設させ、
爪補強リブが、前記首部より前記ケースの内側方向にずれて配設された上端から、外方側に向かって、下がる傾斜とした上面、を設けて、前記周壁部の上端より上方へ突出し、かつ、前記周壁部の内縁まで延びるように、配設されていることを特徴とするエアバッグ装置。
A substantially rectangular parallelepiped having an airbag, an inflator for supplying inflation gas to the airbag, a bottom wall portion and a substantially square cylindrical peripheral wall portion extending upward from an outer peripheral edge of the bottom wall portion, and having an upward opening A shape, a case for storing and holding the inflator and the folded airbag, and a synthetic resin airbag cover for covering the airbag storing the airbag at the time of inflation,
The airbag cover covers the stored airbag, and has a ceiling wall portion having a door portion that is pushed and opened by the airbag when inflated, and extends downward from the periphery of the door portion to extend the case. A substantially rectangular tube-shaped connecting wall portion disposed on the outer peripheral side of the peripheral wall portion and connected to the peripheral wall portion,
A pair of opposing wall portions opposed to the peripheral wall portion each include a plurality of locking claws protruding outward so as to be able to lock the connecting wall portion,
The airbag device, wherein the connecting wall portion of the airbag cover includes a plurality of locking holes into which the locking claws are inserted so as to be locked to the locking claws,
The case is configured as a synthetic resin,
The locking claw is
A neck that extends outward from the upper end of the opposing wall and is disposed on the inner peripheral side of the locking hole at the time of locking;
A locking piece that extends downward from the tip of the neck and restricts the locking claw from coming off from the locking hole;
With
On the upper surface side, the as opposing walls plate extending along the opposing direction of the regulation can be nails reinforcing ribs bending upward the neck, it is provided,
The pawl reinforcing ribs protrude from the displaced inwardly disposed the upper end of the casing from the neck portion toward the outer side, down inclined the upper surface, the is provided, upwardly from the upper end of the peripheral wall portion And the airbag apparatus is arrange | positioned so that it may extend to the inner edge of the said surrounding wall part.
前記係止爪が、一対の前記対向壁部の対向位置に、対応して配設され、
前記爪補強リブと平行に配置される帯状のケース補強リブが、前記ケースの曲げを規制可能に、対向して配置される一対の前記係止爪の配置位置相互を連結するように、前記ケースの周壁部と底壁部との外表面に、突設されていることを特徴とする請求項6に記載のエアバッグ装置。
The locking claws are disposed corresponding to the opposing positions of the pair of opposing wall portions,
The case in which the band-shaped case reinforcing ribs arranged in parallel with the claw reinforcing ribs connect the arrangement positions of the pair of engaging claws arranged opposite to each other so that bending of the case can be restricted. The airbag device according to claim 6 , wherein the airbag device is protruded from the outer surface of the peripheral wall portion and the bottom wall portion.
前記ケース補強リブが、一対の前記係止爪の配置位置相互を連結する爪延長方向リブの他に、該爪延長方向リブと直交する方向に配置される複数の爪直交方向リブを備えて構成されていることを特徴とする請求項7に記載のエアバッグ装置。 The case reinforcing rib includes a plurality of claw orthogonal ribs arranged in a direction orthogonal to the claw extending direction rib in addition to the claw extending direction rib connecting the arrangement positions of the pair of locking claws. The airbag device according to claim 7 , wherein the airbag device is provided. 前記ケースの周壁部が、前記底壁部の上面側に連なる本体部と、前記本体部の上端における外周側の全周に配置される外側壁部と、前記本体部の外周側と前記外側壁部の内周側とを連結する連結リブと、を備えて構成され、
前記連結リブが、前記本体部と前記外側壁部との間を塞ぐように前記外側壁部の上下方向の中間付近に配置される横板部と、前記横板部の上下面で前記本体部から帯状に外方に延びて前記外側壁部に連なる上縦板部及び下縦板部を有してなる縦板部と、を備えて構成され、
前記連結リブの前記下縦板部が、前記爪延長方向リブ及び前記爪直交方向リブの上端部から形成され、
前記連結リブの前記上縦板部が、それぞれ、前記下縦板部の上方に重なるように配置されて、
前記爪補強リブが、前記上縦板部の上部から延設されて配設されていることを特徴とする請求項8に記載のエアバッグ装置。
A peripheral wall portion of the case includes a main body portion that is continuous with the upper surface side of the bottom wall portion, an outer wall portion that is disposed on the entire outer periphery of the upper end of the main body portion, an outer peripheral side of the main body portion, and the outer wall. A connecting rib that connects the inner peripheral side of the part,
A horizontal plate portion disposed near the middle of the outer wall portion in the vertical direction so as to block the connection rib between the main body portion and the outer wall portion, and the main body portion at the upper and lower surfaces of the horizontal plate portion. A vertical plate portion having an upper vertical plate portion and a lower vertical plate portion extending outwardly in a band shape and continuing to the outer wall portion.
The lower vertical plate portion of the connecting rib is formed from upper ends of the claw extension direction rib and the claw orthogonal direction rib,
The upper vertical plate portions of the connecting ribs are respectively arranged so as to overlap above the lower vertical plate portions,
The airbag device according to claim 8 , wherein the claw reinforcing rib is provided so as to extend from an upper portion of the upper vertical plate portion.
前記ケースの周壁部における前記一対の対向壁部の対向方向と直交方向で対向する側壁部相互に、前記エアバッグカバーと固着手段により連結可能に上下方向に貫通する連結孔を有したブラケット部が、外方に突設され、
該ブラケット部が、下面側の両縁に、それぞれ、前記爪直交方向リブから連なる帯状の支持補強リブを設けて、配設されていることを特徴とする請求項8若しくは請求項9に記載のエアバッグ装置。
A bracket portion having a connecting hole penetrating in a vertical direction so as to be connectable by the air bag cover and the fixing means between the side wall portions facing each other in the direction orthogonal to the opposing direction of the pair of opposing wall portions in the peripheral wall portion of the case. , Projecting outward,
10. The bracket according to claim 8 , wherein the bracket portion is provided with band-like support reinforcing ribs that are continuous with the ribs in the claw orthogonal direction on both edges on the lower surface side. Airbag device.
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