JP2008162464A - Knee protecting airbag device - Google Patents

Knee protecting airbag device Download PDF

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Publication number
JP2008162464A
JP2008162464A JP2006355514A JP2006355514A JP2008162464A JP 2008162464 A JP2008162464 A JP 2008162464A JP 2006355514 A JP2006355514 A JP 2006355514A JP 2006355514 A JP2006355514 A JP 2006355514A JP 2008162464 A JP2008162464 A JP 2008162464A
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Prior art keywords
airbag
occupant
slip cloth
knees
right direction
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JP2006355514A
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Japanese (ja)
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Yuichi Adachi
裕一 足立
Kazuaki Bito
和彰 尾藤
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Toyota Motor Corp
Toyoda Gosei Co Ltd
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Toyota Motor Corp
Toyoda Gosei Co Ltd
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Application filed by Toyota Motor Corp, Toyoda Gosei Co Ltd filed Critical Toyota Motor Corp
Priority to JP2006355514A priority Critical patent/JP2008162464A/en
Priority to US11/979,752 priority patent/US20080116669A1/en
Priority to DE102007054061A priority patent/DE102007054061A1/en
Publication of JP2008162464A publication Critical patent/JP2008162464A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a knee protecting airbag device capable of completing deployment toward right and left sides without opening both of right and left knees even when an airbag contacts both of right and left knees of an occupant at the time of inflation. <P>SOLUTION: An airbag 46 of a knee protecting airbag device M1 is housed in a front side area between both of left and right knees KL, KR of a driver D by folding both edges in a rightward and leftward direction at the time of completion of deployment in such a manner that rightward and leftward width dimension becomes narrower. The airbag 46 comprises an airbag body 47 and a slip cloth 53. The surface 53f side of the slip cloth 53 is applied to the right and left knees KR, KL of the driver D to block a space between the knees KL and KR on the driver D side of the airbag body 47 projecting from a housing portion, and the airbag body 47 is slid on the rear surface 53g side, so as to guide deployment of the airbag body 47 toward both the right and left sides. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、車両衝突時に着座した乗員(運転者や助手席搭乗者等)の左右両膝を膨張したエアバッグによって保護する膝保護用エアバッグ装置に関し、特に、エアバッグが、展開膨張完了時より左右方向の幅寸法を狭くするように、左右方向の両縁側を中央側に接近させるように折り畳まれて、乗員の左右両膝の間における前方側のエリアに配置された収納部位に、折り畳まれて収納される膝保護用エアバッグ装置に関する。   The present invention relates to a knee protection airbag device that protects both left and right knees of a passenger (driver, passenger in a passenger seat, etc.) seated at the time of a vehicle collision with an inflated airbag, and in particular, when the airbag is fully deployed and inflated. It is folded so that both sides in the left and right direction are closer to the center so that the width dimension in the left and right direction is narrower, and is folded into the storage part arranged in the front area between the left and right knees of the occupant. The present invention relates to an airbag device for knee protection that is stored.

従来、膝保護用エアバッグ装置では、折り畳まれたエアバッグが、着座した乗員の左右両膝の間の前方側に接近して収納され、作動時、エアバッグに膨張用ガスが供給されて、エアバッグが、展開膨張しつつ、乗員の左右両膝の前方側に配置されるように、収納部位から突出する構成としていた(例えば、特許文献1参照)。   Conventionally, in a knee protection airbag device, a folded airbag is stored close to the front side between the left and right knees of a seated occupant, and when activated, inflation gas is supplied to the airbag. The airbag is configured to protrude from the storage portion so as to be disposed on the front side of the left and right knees of the occupant while deploying and inflating (see, for example, Patent Document 1).

従来の膝保護用エアバッグ装置では、作動時、エアバッグ内に配置させたインフレーターが、膨張用ガスを左右両側の斜め下方向に向けて吐出させ、エアバッグが、収納部位としてのコラムカバーの略中心から放射状に展開膨張し、そして、膨張するエアバッグにより、乗員(運転者)の両膝を広げるようにして、コラムカバーから運転者の膝を保護するように作動していた。
特開2002−37003号公報
In the conventional knee protection airbag device, the inflator disposed in the airbag discharges the inflation gas in an obliquely downward direction on both the left and right sides when the airbag is in operation, and the airbag functions as a storage portion of the column cover. The airbag was deployed and inflated radially from the approximate center, and the knees of the occupant (driver) were spread by the inflating airbag, and the driver's knee was protected from the column cover.
JP 2002-37003 A

しかし、エアバッグが、左右方向の保護エリアを広く確保できるように、左右方向両側へ広く展開しようとする構成の場合には、乗員の左右両膝の間に進入するエアバッグの構成では、展開膨張初期に、エアバッグが乗員の膝と接触し易く、かつ、エアバッグは、接触した後に左右方向へ広く展開し難くなって、前進移動する膝に正対するように、配置されない虞れが生ずる。   However, when the airbag is configured to be deployed widely on both sides in the left-right direction so that a large protection area in the left-right direction can be secured, the airbag configuration that enters between the left and right knees of the occupant is deployed. In the initial stage of inflation, the airbag is likely to come into contact with the occupant's knee, and after the contact, the airbag becomes difficult to expand widely in the left-right direction, and there is a possibility that the airbag will not be placed so as to face the knee that moves forward. .

本発明は、上記の課題を解決するもので、エアバッグが、展開膨張初期に乗員の左右両膝に接触しても、左右両膝を広げることなく、左右両側への展開を完了させて、クッション作用を確保して円滑に前進移動する左右両膝を受け止めることができる膝保護用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 problems, and even if the airbag contacts the left and right knees of the occupant in the initial stage of inflation, the left and right knees are not expanded, and the deployment to the left and right sides is completed. It is an object of the present invention to provide a knee protection airbag device that can catch both left and right knees that move forward smoothly while ensuring a cushioning action.

本発明に係る膝保護用エアバッグ装置は、膨張用ガスを供給されて展開膨張を完了させた際、着座した乗員の左右の膝の前方側に配置されるエアバッグを備え、
エアバッグが、膨張完了時の左右方向の両縁側を中央側に接近させて膨張完了時より左右方向の幅寸法を狭くするように折り畳んで、乗員の左右両膝の間における前方側のエリアに配置された収納部位に、収納される膝保護用エアバッグ装置であって、
エアバッグが、
膨張完了時に乗員側に配置される乗員側壁部と車体側に配置される車体側壁部とを備えて板状に膨張するエアバッグ本体と、
展開膨張時のエアバッグ本体の乗員側に配置される可撓性を有したスリップ布と、
を備えて構成され、
スリップ布が、
エアバッグの展開膨張時、収納部位から突出するエアバッグ本体の乗員側において、表面側を乗員の左右の膝に当てて乗員の左右両膝の間を塞ぐとともに、裏面側でエアバッグ本体を滑らせて、エアバッグ本体の左右方向両側への展開を案内可能に、
左右方向の長さを狭めるようにスリップ布だけで折られた弛み部を設けるとともに、折り畳まれたエアバッグ本体の乗員側の面から少なくとも左右両側面を覆って、エアバッグ本体とともに収納部位に収納されるとともに、
平らに展開した左右方向の長さ寸法を、エアバッグの展開膨張時、収納部位から突出するエアバッグ本体の乗員側において、表面側を乗員の左右の膝に当てて乗員の左右両膝の間を塞ぎ可能な寸法に、設定されていることを特徴とする。
The airbag device for knee protection according to the present invention includes an airbag that is disposed on the front side of the left and right knees of a seated occupant when inflation gas is supplied to complete deployment and inflation,
The airbag is folded in such a way that both sides in the left and right direction when the inflation is completed are closer to the center side and the width dimension in the left and right direction is narrower than when the inflation is completed. A knee protection airbag device to be stored in the storage portion disposed,
Airbag
An airbag main body that includes an occupant side wall portion that is disposed on the occupant side and a vehicle body side wall portion that is disposed on the vehicle body side when the inflation is completed;
A flexible slip cloth disposed on the occupant side of the airbag body during deployment and inflation;
Configured with
Slip cloth,
When the airbag is deployed and inflated, on the occupant side of the airbag body that protrudes from the storage area, the front side is applied to the left and right knees of the occupant to close the space between the left and right knees of the occupant, and the airbag body is slid on the back side. Let it be possible to guide the deployment of the airbag body on both sides in the left-right direction.
In addition to providing a slack part that is folded only with a slip cloth so as to narrow the length in the left-right direction, it covers at least the left and right side surfaces from the passenger side of the folded airbag body and stores it in the storage area together with the airbag body As
When the airbag is deployed and inflated, the length of the left and right sides that are flatly deployed is on the occupant side of the airbag body that protrudes from the storage area. It is set to a dimension that can be closed.

本発明に係る膝保護用エアバッグ装置では、作動時、エアバッグのエアバッグ本体が膨張用ガスを供給されて収納部位から突出する。その際、エアバッグ本体が、左右両側へ広く展開する前に、乗員の左右両膝に接触しつつ左右両膝の間に進入しようとしても、スリップ布が、エアバッグ本体の折り畳み収納時、折り畳まれたエアバッグ本体の乗員側の面から少なくとも左右両側面を覆っており、迅速に弛み部を延ばしつつ、エアバッグ本体の乗員側において、表面側を乗員の左右の膝に当てて乗員の左右の膝の間を塞ぐ。そして、スリップ布は、裏面側でエアバッグ本体を滑らせて、エアバッグ本体の左右方向への展開を案内することから、エアバッグ本体は、乗員の左右両膝の間に進入することなく、左右両膝に正対するように、左右両側に展開膨張することとなる。   In the knee protection airbag device according to the present invention, the airbag main body of the airbag protrudes from the storage portion when supplied with the inflation gas during operation. At that time, even if the airbag body tries to enter between the left and right knees while being in contact with the left and right knees before the airbag body is widely deployed on both the left and right sides, the slip cloth is folded when the airbag body is folded and stored. The air bag body covers at least the left and right side surfaces from the occupant side surface of the airbag body. Block between the knees. And since the slip cloth slides the airbag body on the back side and guides the deployment of the airbag body in the left-right direction, the airbag body does not enter between the left and right knees of the occupant, It expands and expands on both the left and right sides so that it faces the left and right knees.

したがって、本発明に係る膝保護用エアバッグ装置では、エアバッグが展開膨張初期に乗員の左右両膝に接触しても、スリップ布が左右両膝に接触しつつ左右両膝の間を塞ぐことから、エアバッグ本体が、左右両膝を広げることなく、左右両側への展開を完了させて、クッション作用を確保して円滑に前進移動する左右両膝を受け止めることができる。   Therefore, in the knee protection airbag device according to the present invention, even if the airbag contacts the left and right knees of the occupant in the initial stage of deployment, the slip cloth closes the left and right knees while contacting the left and right knees. Thus, the airbag body can complete the deployment to the left and right sides without spreading the left and right knees, and can receive both the left and right knees moving forward smoothly with a cushioning action.

なお、スリップ布の平らに展開した左右方向の長さ寸法は、エアバッグの展開膨張時、収納部位から突出するエアバッグ本体の乗員側において、表面側を乗員の左右の膝に当てて乗員の左右両膝の間を塞ぎ可能であれば、少なくとも、着座した乗員の左右両膝をともに前方側から十分に覆える左右方向の幅寸法以上として、平らに展開したエアバッグ本体の左右方向の長さ寸法より若干短い寸法を含めた同等以上の寸法であればよい。すなわち、エアバッグ本体自体は、展開膨張を完了させた状態で、乗員の左右両膝を保護可能な左右方向の長さ寸法を確保されて設定されており、その膨張時の左右方向の長さ寸法より、エアバッグ本体は、非膨張の平らに展開させた状態の左右方向の長さ寸法が長くなる。そしてさらに、その平らに展開したエアバッグ本体の左右方向の長さ寸法と同等以上の寸法に、スリップ布における平らに展開した状態での左右方向の長さ寸法が設定されていれば、スリップ布は、エアバッグの展開膨張時に、確実に乗員の左右両膝に当てる状態を、確保できることとなる。   Note that the length of the slip cloth in the left and right direction when it is deployed flatly is such that when the airbag is deployed and inflated, the front side of the airbag body that protrudes from the storage area is placed on the left and right knees of the occupant. If the left and right knees can be closed, at least the left and right knees of the seated occupant should be at least as wide as the width in the left and right direction so that they can be covered sufficiently from the front side. Any dimension that is equal to or greater than that including a dimension slightly shorter than the dimension may be used. That is, the airbag body itself is set with a length dimension in the left-right direction that can protect both the left and right knees of the occupant in a state in which the deployment and inflation are completed. From the dimensions, the airbag body has a longer length in the left-right direction in a state where the airbag body is unflattened and flattened. Furthermore, if the length dimension in the left and right direction in the flatly deployed state of the slip cloth is set to a dimension equal to or greater than the length dimension in the left and right direction of the flatly deployed airbag body, the slip cloth Therefore, it is possible to ensure that the airbag is reliably applied to the left and right knees of the occupant when the airbag is deployed and inflated.

そして、スリップ布は、エアバッグ本体の乗員側壁部に、対応する左右方向の両縁相互を重ねた状態で、エアバッグ本体のそれぞれの左右両縁における左右方向の中央側へ接近させるように折り畳む折り畳み部位に、それぞれ、スリップ布の左右両縁側の一部だけを、巻き込ませた巻き込み部位を形成して、エアバッグ本体とともに、収納部位に収納することが望ましい。   Then, the slip cloth is folded so as to approach the center side in the left-right direction at each of the left and right edges of the airbag body with the corresponding left and right edges overlapped with the passenger side wall portion of the airbag body. It is desirable to form a entanglement site in which only a part of the left and right edges of the slip cloth is entrained in the folded region, and store it in the storage region together with the airbag body.

このような構成では、スリップ布の左右両縁側が、巻き込み部位を利用して、エアバッグ本体の折り畳み部位に保持された状態となり、エアバッグ本体の膨張初期に、スリップ布における乗員の左右両膝に接触する接触部位が、それぞれ、移動軌跡を安定させることができ、乗員の左右両膝に対して、的確に接触し、かつ、左右両膝から支持されることができて、スリップ布の裏面側でのエアバッグ本体の展開案内を確実に行うことができる。なお、このスリップ布は、弛み部を設けて、スリップ布の左右両縁側の巻き込み部位を、エアバッグ本体の折り畳み部位に巻き込ませているだけであって、エアバッグ本体の左右方向への展開時におけるスリップ布の裏面側を滑る相対移動は、規制されることなく、スリップ布が弛み部の長さ分の余裕により、自由に行なわれる。   In such a configuration, the left and right edges of the slip cloth are held in the folded portion of the airbag body using the entanglement portion, and the left and right knees of the occupant in the slip cloth are in the initial stage of inflation of the airbag body. Each of the contact parts that come into contact with each other can stabilize the movement trajectory, accurately contact the left and right knees of the occupant, and be supported from both the left and right knees, and the back surface of the slip cloth. The airbag body can be reliably guided on the side. In addition, this slip cloth is provided with a slack portion, and only the wrapping part on both the left and right edges of the slip cloth is entangled in the folding part of the airbag body, and when the airbag body is deployed in the left-right direction. The relative movement of the slip cloth on the back side of the slip cloth is not restricted, and the slip cloth is freely performed with a margin of the length of the slack portion.

そして、このスリップ布は、エアバッグ本体の展開途中の案内を行えれば、エアバッグ本体の膨張完了後には、不要となることから、必ずしも、エアバッグ本体と結合させていなくとも良い。但し、スリップ布の左右方向の中央部位をエアバッグ本体の乗員側壁部の左右方向の中央部位に、結合させたり、あるいは、スリップ布の左右方向の縁の少なくとも一方を、対応するエアバッグ本体の左右方向の縁に、結合させて、スリップ布をエアバッグ本体の一部に結合させておけば、エアバッグ本体の展開途中に、エアバッグ本体の乗員側からスリップ布が外れる虞れが無くなり、一層、安定したエアバッグ本体の左右方向への展開を確保でき、また、乗員側へのスリップ布の飛散も防止できる。   And if this slip cloth can perform guidance in the middle of deployment of an air bag body, it will not be necessary after air bag main body completion of expansion, and therefore does not necessarily need to be combined with an air bag body. However, the center part in the left-right direction of the slip cloth is joined to the center part in the left-right direction of the occupant side wall of the airbag body, or at least one of the edges in the left-right direction of the slip cloth is connected to the corresponding airbag body. If the slip cloth is joined to the edge of the left and right direction, and the slip cloth is joined to a part of the airbag body, there is no possibility that the slip cloth will come off from the passenger side of the airbag body during the deployment of the airbag body. Further, it is possible to secure a stable deployment of the airbag body in the left-right direction, and it is possible to prevent the slip cloth from scattering to the passenger side.

そして、スリップ布の左右方向の中央部位をエアバッグ本体の乗員側壁部の左右方向の中央部位に、結合させる場合には、スリップ布の左右両縁が、エアバッグ本体に結合されていないことから、エアバッグ本体の左右両縁付近の折りの解消時、左右方向への展開が、スリップ布の抵抗を受けず、バランス良く迅速に行われる。一方、スリップ布の左右方向の縁の少なくとも一方を、対応するエアバッグ本体の左右方向の縁に、結合させる場合には、エアバッグ本体のスリップ布と結合されている縁付近では、スリップ布から展開時の抵抗を受けるものの、展開完了時まで、確実に、エアバッグ本体の乗員側にスリップ布を配置させておくことができて、エアバッグ本体が、スリップ布に結合された左右方向の縁までの全域にわたり、スリップ布の裏面側によって円滑に展開を案内されることとなる。   And when connecting the left and right center part of the slip cloth to the right and left center part of the occupant side wall portion of the airbag body, the left and right edges of the slip cloth are not connected to the airbag body. When the folding in the vicinity of both the left and right edges of the airbag body is resolved, the lateral development is performed quickly with good balance without receiving the resistance of the slip cloth. On the other hand, when at least one of the left and right edges of the slip cloth is coupled to the corresponding left and right edges of the airbag body, the slip cloth is separated from the slip cloth in the vicinity of the edge that is coupled to the slip cloth of the airbag body. Although it receives resistance at the time of deployment, the slip cloth can be surely placed on the passenger side of the airbag body until the deployment is completed, and the airbag body is connected to the slip cloth in the left and right edges. Through the entire area up to this point, the development is smoothly guided by the back side of the slip cloth.

さらに、本発明に係る膝保護用エアバッグ装置では、作動時、収納されたエアバッグを、収納部位から下方に突出させるとともに左右両側に展開させて膨張させるように、インストルメントパネルから後方へ突出するステアリングコラムを覆うコラムカバーの下部側に、搭載させて、ステアリングコラム付けの膝保護用エアバッグ装置として構成することが望ましい。   Furthermore, in the knee protection airbag device according to the present invention, when activated, the stored airbag protrudes rearward from the instrument panel so as to protrude downward from the storage portion and expand and expand to the left and right sides. It is desirable to mount it on the lower side of the column cover that covers the steering column to be configured as a knee protection airbag device with a steering column.

すなわち、ステアリングコラム付けの場合には、乗員としての運転者の左右両膝とコラムカバーの収納部位との距離が短く、展開膨張するエアバッグが、運転者の左右両膝の間へ進入する虞れが大きくなるものの、本発明の膝保護用エアバッグ装置では、膝を保護可能なエアバッグ本体を、左右両膝の間に進入させることなく、安定して左右両側へ展開膨張させることが可能となって、好適に使用することができる。   That is, when the steering column is attached, the distance between the left and right knees of the driver as the occupant and the storage part of the column cover is short, and the airbag that is inflated and inflated may enter between the left and right knees of the driver. However, in the knee protection airbag device of the present invention, the airbag body capable of protecting the knee can be stably deployed and inflated to the left and right without entering between the left and right knees. Thus, it can be suitably used.

この場合、エアバッグ本体内に、膨張用ガスを供給するインフレーターを収納させるとともに、展開膨張完了時のエアバッグ本体の左右両縁側における左右方向へ接近させる折り畳み部位の少なくとも一部を、それぞれ、インフレーターの下方で左右方向に並設させるように、隣接して配設させて、エアバッグを収納部位に収納してもよい。   In this case, an inflator for supplying an inflating gas is housed in the airbag body, and at least a part of the folded portion that is made to approach in the left-right direction on the left and right edges of the airbag body at the time of deployment and inflation is respectively inflated. The airbag may be stored adjacent to the storage portion so as to be juxtaposed in the left-right direction below.

このような構成では、折り畳んだエアバッグとインフレーターとの左右方向の幅寸法を小さくすることができて、搭載スペースに制限のあるステアリングコラム付けの膝保護用エアバッグ装置として、一層、好適に使用することができる。   With such a configuration, the width of the folded airbag and inflator in the left-right direction can be reduced, and it can be used more favorably as a knee protection airbag device with a steering column that has a limited mounting space. can do.

以下、本発明の一実施形態を図面に基づいて説明すると、第1実施形態の膝保護用エアバッグ装置M1は、図1,2に示すように、ステアリングコラム3に取り付けられるステアリングコラム付けのものであり、そして、図2,3に示すように、折り畳んだエアバッグ46をコラムカバー16内の下部16a側に収納させて構成されている。この膝保護用エアバッグ装置M1は、折り畳まれたエアバッグ46と、エアバッグ46に膨張用ガスを供給するインフレーター37と、エアバッグ46とインフレーター37とを収納する収納部位としてのケース32と、を備えて構成され、膨張時のエアバッグ46が、コラムカバー16に設けた扉部26を押し開いて、着座した乗員としての運転者Dの両膝K(左膝KL,右膝KR)の前方側に配置されるように、ケース32から運転者Dの両膝KL,KR側となる下方若しくは後方(詳しくは、斜め後下方向)に突出するように、構成されている(図1,7参照)。   DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. A knee protection airbag device M1 according to a first embodiment has a steering column attached to a steering column 3 as shown in FIGS. As shown in FIGS. 2 and 3, the folded airbag 46 is accommodated on the lower portion 16 a side in the column cover 16. The knee protecting airbag device M1 includes a folded airbag 46, an inflator 37 that supplies inflation gas to the airbag 46, a case 32 as a storage part that stores the airbag 46 and the inflator 37, The airbag 46 when inflated pushes and opens the door portion 26 provided on the column cover 16, so that both knees K (left knee KL, right knee KR) of the driver D as a seated passenger It is configured so as to protrude from the case 32 downward or rearward (specifically, diagonally rearward downward) from the case 32 so as to be disposed on the front side (see FIG. 1, FIG. 1). 7).

なお、本明細書では、前後・左右・上下の方向は、特に断らない限り、直進操舵時の車両の前後・左右・上下の方向と一致するものである。   In this specification, the front / rear, left / right, and up / down directions are the same as the front / rear, left / right, up / down directions of the vehicle during straight steering unless otherwise specified.

コラムカバー16は、図1〜3に示すように、インストルメントパネル(以下、インパネとする)7から後方へ突出するステアリングコラム3を覆うような略四角筒形状の合成樹脂製として、図示しない部位でステアリングコラム3のコラムチューブ5に取り付けられ、インパネ7の収納用開口10から後方側へ突出するとともに、ステアリングコラム3の軸方向O1(図2参照)に沿うように前端側を下方に位置させて後端側を上方に位置させるように傾斜させて、着座した運転者Dの前方に配設されている。なお、ステアリングコラム3は、メインシャフト4とその周囲に配置されるコラムチューブ5とを備えて構成され、メインシャフト4には、ステアリングホイール1が接続されている。インパネ7は、上部側のアッパパネル8と下部側のロアパネル9とから構成されている。   As shown in FIGS. 1 to 3, the column cover 16 is made of a synthetic resin having a substantially rectangular tube shape so as to cover the steering column 3 protruding rearward from the instrument panel (hereinafter referred to as instrument panel) 7. Is attached to the column tube 5 of the steering column 3 and protrudes rearward from the storage opening 10 of the instrument panel 7, and the front end side is positioned downward along the axial direction O1 (see FIG. 2) of the steering column 3. The rear end side is inclined so as to be positioned upward, and is disposed in front of the seated driver D. The steering column 3 includes a main shaft 4 and a column tube 5 disposed around the main shaft 4, and the steering wheel 1 is connected to the main shaft 4. The instrument panel 7 includes an upper panel 8 on the upper side and a lower panel 9 on the lower side.

また、コラムカバー16には、図1,2,6に示すように、外周面18の下面18a側から左側面18bと右側面18cとにわたるエリアに、エアバッグ46の突出時における一つの突出用開口22を形成可能に、エアバッグ46に押されて開く扉部26が配設されている。扉部26は、コラムカバー16の周壁17における下壁17aに配置される下前ドア部27及び下後ドア部28と(図2参照)、周壁17の左側壁17bに配置される左ドア部29と、周壁17の右側壁17cに配置される右ドア部30と、から構成されている(図3,6参照)。下前ドア部27は、前縁側に配置されたヒンジ部27aを回転中心として前方側に開き、下後ドア部28は、後縁側に配置されたヒンジ部28aを回転中心として後方側に開き、左ドア部29と右ドア部30とは、それぞれ、上縁側に配置されたヒンジ部29a,30aを回転中心として上方側に開くように、構成されている。これらの下前ドア部27、下後ドア部28、左ドア部29、及び、右ドア部30は、インテグラルヒンジからなるヒンジ部27a,28a,29a,30aの部位を除いて、周囲に、膨張するエアバッグ46に押圧された際に破断可能に薄肉とした破断予定部24を配設させて構成されている。   As shown in FIGS. 1, 2, and 6, the column cover 16 is provided with one protrusion when the airbag 46 protrudes in an area extending from the lower surface 18a side of the outer peripheral surface 18 to the left side surface 18b and the right side surface 18c. A door portion 26 that is pushed and opened by the airbag 46 is disposed so that the opening 22 can be formed. The door portion 26 includes a lower front door portion 27 and a lower rear door portion 28 disposed on the lower wall 17a of the peripheral wall 17 of the column cover 16 (see FIG. 2), and a left door portion disposed on the left side wall 17b of the peripheral wall 17. 29 and the right door part 30 arrange | positioned at the right side wall 17c of the surrounding wall 17 (refer FIG.3, 6). The lower front door portion 27 opens to the front side with the hinge portion 27a arranged on the front edge side as the rotation center, and the lower rear door portion 28 opens to the rear side with the hinge portion 28a arranged on the rear edge side as the rotation center, The left door portion 29 and the right door portion 30 are configured to open upward with the hinge portions 29a and 30a disposed on the upper edge side as rotation centers. The lower front door portion 27, the lower rear door portion 28, the left door portion 29, and the right door portion 30 are provided around the hinge portions 27a, 28a, 29a, and 30a made of an integral hinge. When the airbag 46 is inflated, the to-be-breakable portion 24 is disposed so as to be thin so that it can be broken.

また、コラムカバー16内には、図2に示すように、突出用開口22を形成するエリアの前後の縁に、それぞれ、下壁17aから上方に延びる側壁19,20が形成されている。側壁19,20は、コラムカバー16内において、ケース32とともに、折り畳まれたエアバッグ46とインフレーター37との収納スペースSを区画して規定するものである。さらに、これらの側壁19,20は、ケース32の取付壁の役目も果たしており、ケース32の各係止片34a,35aを挿入させて、周縁を係止片34a,35aに係止させる複数の係止孔19a,20aが形成されている。   Further, as shown in FIG. 2, side walls 19 and 20 extending upward from the lower wall 17 a are formed in the column cover 16 at the front and rear edges of the area where the projection opening 22 is formed. The side walls 19 and 20 define the storage space S for the folded airbag 46 and inflator 37 together with the case 32 in the column cover 16. Further, these side walls 19 and 20 also serve as mounting walls of the case 32, and a plurality of locking pieces 34a and 35a of the case 32 are inserted and the peripheral edges are locked to the locking pieces 34a and 35a. Locking holes 19a and 20a are formed.

なお、コラムカバー16内の折り畳まれたエアバッグ46とインフレーター37との収納スペースSは、左右両側が、扉部26の左ドア部29と右ドア部30とに囲まれ、前後両側が、ケース32の前後の側壁34,35に囲まれ、上方側がケース32の天井壁33に囲まれ、下方側が下前ドア部27と下後ドア部28とに囲まれて、設定されている。   The storage space S for the folded airbag 46 and the inflator 37 in the column cover 16 is surrounded by the left door portion 29 and the right door portion 30 of the door portion 26 on both the left and right sides, and the front and rear sides are the case. 32, the upper side is surrounded by the ceiling wall 33 of the case 32, and the lower side is surrounded by the lower front door portion 27 and the lower rear door portion 28.

ケース32は、図2に示すように、断面逆U字形とした板金製として、天井壁33と、天井壁33の前後の縁から下方に延びる側壁34,35とを備えて構成されており、各側壁34,35には、コラムカバー16の側壁19,20に設けた各係止孔19a,20aに挿入されて、側壁19,20と連結される複数の断面J字形の係止片34a,35aが形成されている。天井壁33には、インフレーター37の各ボルト40を貫通させる複数(実施形態で二つ)の貫通孔33aが形成されている。   As shown in FIG. 2, the case 32 is made of a sheet metal having an inverted U-shaped cross section, and includes a ceiling wall 33 and side walls 34 and 35 extending downward from front and rear edges of the ceiling wall 33. A plurality of J-shaped locking pieces 34a, which are inserted into the locking holes 19a, 20a provided in the side walls 19, 20 of the column cover 16 and are connected to the side walls 19, 20, respectively. 35a is formed. The ceiling wall 33 is formed with a plurality (two in the embodiment) of through-holes 33a through which the bolts 40 of the inflator 37 are passed.

ケース32は、インフレーター37とエアバッグ46とを収納保持する収納部位を構成し、ステアリングコラム3のコラムチューブ5に取付固定されることとなる。このケース32は、運転者Dの左右両膝KL,KRの離隔距離WK(図6のB参照)より狭い左右方向の幅寸法SH(図3参照)として、第1実施形態の場合には、両膝KL,KRの間の中央における前方側のエリアに配置され(図6参照)、そして、ケース32は、図3に示すように、エアバッグ46をケース32に取付固定するインフレーター37のボルト40をナット41止めして、コラムチューブ5のブラケット5aに取付固定される構成としている。   The case 32 constitutes a storage portion for storing and holding the inflator 37 and the airbag 46, and is attached and fixed to the column tube 5 of the steering column 3. In the case of the first embodiment, the case 32 has a lateral width SH (see FIG. 3) narrower than the separation distance WK (see B in FIG. 6) between the left and right knees KL and KR of the driver D. The case 32 is disposed in a front area in the center between the knees KL and KR (see FIG. 6), and the case 32 is a bolt of an inflator 37 that attaches and fixes the airbag 46 to the case 32 as shown in FIG. 40 is fixed to the bracket 5a of the column tube 5 by fixing the nut 41 to the nut 41.

インフレーター37は、図2,3に示すように、膨張用ガスを吐出させる複数のガス吐出口38aを有したシリンダタイプの円柱状の本体38と、本体38を保持して、エアバッグ46をケース32に取付固定する板金製のリテーナ39と、から構成されている。本体38は、車両搭載時に、左右方向に軸方向O2(図3参照)を配置させて、左右方向の中央に複数のガス吐出口38aを配置させる構成としている。リテーナ39は、本体38の軸方向O2と一致する左右方向に沿った軸方向O2を備えた略円筒状として、上方に延びて左右方向に沿って並設される複数(実施形態では2本)のボルト40を備えている。リテーナ39の左右両端は、ガス吐出口38aから吐出された膨張用ガスを左右両側外方へ流すための開口39aとなり、下面側を半割り円筒状とするように切り欠かれて構成されている。また、リテーナ39の左右方向の中央付近には、本体38を挿入させた際に保持可能に、縮径された挟持部39bが形成されている。   As shown in FIGS. 2 and 3, the inflator 37 includes a cylinder-type columnar main body 38 having a plurality of gas discharge ports 38a for discharging inflation gas, a main body 38, and an airbag 46 as a case. A retainer 39 made of sheet metal that is fixedly attached to 32. The main body 38 is configured such that when the vehicle is mounted, the axial direction O2 (see FIG. 3) is disposed in the left-right direction, and a plurality of gas discharge ports 38a are disposed in the center in the left-right direction. The retainer 39 has a plurality of (two in the embodiment) that extend upward and are arranged in parallel in the left-right direction as a substantially cylindrical shape having an axial direction O2 along the left-right direction that coincides with the axial direction O2 of the main body 38. Bolt 40 is provided. The left and right ends of the retainer 39 are openings 39a for allowing the inflation gas discharged from the gas discharge ports 38a to flow outwardly on both the left and right sides, and the lower surface side is notched so as to have a half-cylindrical shape. . Further, in the vicinity of the center in the left-right direction of the retainer 39, a pinched portion 39b having a reduced diameter is formed so as to be able to be held when the main body 38 is inserted.

なお、第1実施形態の場合、リテーナ39の各ボルト40は、既述したように、インフレーター37とエアバッグ本体47とをケース32に取り付けるとともに、ケース32自体を、ステアリングコラム3のコラムチューブ5のブラケット5aにナット41止めして取り付ける役目を果たしている。   In the case of the first embodiment, each bolt 40 of the retainer 39 attaches the inflator 37 and the airbag main body 47 to the case 32 as described above, and the case 32 itself is attached to the column tube 5 of the steering column 3. It plays the role of attaching the nut 41 to the bracket 5a.

エアバッグ46は、図4に示すように、エアバッグ本体47とスリップ布53とから構成されている。エアバッグ本体47は、膨張完了時に運転者D側(乗員側)に配置される乗員側壁部48と車体側のコラムカバー16側に配置される車体側壁部49とを備えて(図7参照)、左右方向に延びた略長方形の板状に膨張する形状としている。乗員側壁部48と車体側壁部49とは、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なり、略長方形の同形状として裁断され、外周縁相互を縫合して、平面エアバッグタイプのエアバッグ本体47を形成している。   As shown in FIG. 4, the airbag 46 includes an airbag body 47 and a slip cloth 53. The airbag main body 47 includes an occupant side wall portion 48 disposed on the driver D side (occupant side) and a vehicle body side wall portion 49 disposed on the vehicle body side column cover 16 side when the inflation is completed (see FIG. 7). The shape is such that it expands into a substantially rectangular plate extending in the left-right direction. The occupant side wall portion 48 and the vehicle body side wall portion 49 are made of a flexible woven fabric such as polyester or polyamide, and are cut into a substantially rectangular shape, and the outer peripheral edges are sewn together to form a plane airbag type. An airbag main body 47 is formed.

また、エアバッグ本体47の車体側壁部49には、図3,4に示すように、前後左右の中央に、インフレーター37のボルト40を挿通させる二つの取付孔51が左右方向に沿って並設されている。そして、実施形態の場合、エアバッグ本体47がインフレーター37を利用してケース32に、そしてさらに、コラムチューブ5に取り付けられることから、取付孔51,51の周囲のインフレーター37の配置領域が、ボルト40のナット41止め時にケース32の天井壁33とインフレーター37のリテーナ39とで挟持されて、ケース32に取り付けられる取付部50となる。そのため、実施形態の場合、取付部50は、車体側壁部49の前後左右の中央で、インフレーター37の外形形状に対応する左右方向に延びた略長方形の領域となる。   Further, as shown in FIGS. 3 and 4, two attachment holes 51 through which the bolts 40 of the inflator 37 are inserted side by side in the vehicle body side wall portion 49 of the airbag main body 47, as shown in FIGS. Has been. In the case of the embodiment, since the airbag main body 47 is attached to the case 32 using the inflator 37 and further to the column tube 5, the arrangement region of the inflator 37 around the attachment holes 51 and 51 is a bolt. When the 40 nut 41 is fixed, the mounting portion 50 is attached to the case 32 by being sandwiched between the ceiling wall 33 of the case 32 and the retainer 39 of the inflator 37. Therefore, in the case of the embodiment, the attachment portion 50 is a substantially rectangular region extending in the left-right direction corresponding to the outer shape of the inflator 37 at the front-rear and left-right centers of the vehicle body side wall portion 49.

なお、エアバッグ本体47は、車体側壁部49と乗員側壁部48とを連結して、膨張時の厚さを規制して、膨張完了時に略長方形板状を維持可能なテザーを内部に配設させている。   In addition, the airbag body 47 connects the vehicle body side wall portion 49 and the occupant side wall portion 48, regulates the thickness at the time of inflation, and arranges a tether that can maintain a substantially rectangular plate shape when the inflation is completed. I am letting.

また勿論、このエアバッグ本体47は、展開膨張完了時、運転者Dの左右の左膝KLと右膝KRに対して、インパネ7から後方へ突出したコラムカバー16の下面18a側と、インパネ7における収納用開口10の下縁側周縁11となる後面7aを覆い可能な前後左右の寸法を確保して、構成されている(図7参照)。   Of course, the airbag main body 47 has a lower surface 18a side of the column cover 16 protruding rearward from the instrument panel 7 with respect to the left and right left knees KL and right knees KR of the driver D, and the instrument panel 7 when the deployment and inflation are completed. The front and rear, right and left dimensions capable of covering the rear surface 7a which becomes the lower edge side periphery 11 of the storage opening 10 are secured (see FIG. 7).

また、第1実施形態の場合、エアバッグ本体47は、乗員側壁部48と車体側壁部49とを別体とした二枚から構成したが、前後の周縁の一部で連結された一枚の布材を、二つ折りして、外周縁を縫合して形成してもよい。   Further, in the case of the first embodiment, the airbag main body 47 is composed of two pieces in which the occupant side wall portion 48 and the vehicle body side wall portion 49 are separated from each other. The cloth material may be formed by folding in half and sewing the outer peripheral edge.

スリップ布53は、図4に示すように、展開膨張時のエアバッグ本体47の運転者D側の面(乗員側壁部48側)に配置される可撓性を有して左右方向に延びた帯状としている。スリップ布53は、平らに展開した左右方向の長さ寸法LHを、運転者Dの左右両膝KL,KRの離隔距離WKより長くし、さらに、平らに展開させたエアバッグ本体の左右方向の長さ寸法DH以上として、第1実施形態の場合、長さ寸法DHより長くして、すなわち、左縁53cや右縁53dを平らに展開したエアバッグ本体47の左右の左縁47cや右縁47dから突出させる長さ寸法とし、前後方向の長さ寸法LVを、運転者Dの両膝KL,KRの上下の領域をカバーできる長さ寸法を確保して、第1実施形態の場合、前縁53aや後縁53bを平らに展開したエアバッグ本体47の前後の前縁47aや後縁47bより内側に配置させる長さ寸法としている。   As shown in FIG. 4, the slip cloth 53 extends in the left-right direction with flexibility so as to be disposed on the surface on the driver D side (occupant side wall 48 side) of the airbag main body 47 when deployed and inflated. It is striped. In the slip cloth 53, the length LH in the left-right direction deployed flat is longer than the separation distance WK between the left and right knees KL, KR of the driver D. In the case of the first embodiment, the length dimension DH is equal to or longer than the length dimension DH, that is, the left and right left edges 47c and right edges of the airbag body 47 in which the left edge 53c and the right edge 53d are flatly deployed. In the case of the first embodiment, the length dimension LV is projected from 47d, the length dimension LV in the front-rear direction is secured to cover the upper and lower areas of both knees KL and KR of the driver D, The edge 53a and the rear edge 53b have a length dimension that is arranged inside the front and rear front edges 47a and 47b of the airbag body 47 in which the airbag 53 is flatly developed.

さらに、スリップ布53も、エアバッグ本体47と同様に、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。なお、スリップ布53は、乗員側壁部48側となる裏面53g側のエアバッグ本体47に対する滑りを良好とするように、裏面53g側に、乗員側壁部48自体より滑りの良い布材を使用したり、あるいは、別途、滑剤を塗布するように構成してもよい。また、スリップ布53の運転者Dの左右両膝KL,KR側となる表面53f側は、左右両膝KL,KRと接触した際に、安定して支持されるように、重量の増加を抑えて滑りを防止する布材を使用したり、あるいは、滑り防止剤を塗布するように構成してもよい。   Further, the slip cloth 53 is also formed of a flexible woven cloth such as polyester or polyamide like the airbag main body 47. The slip cloth 53 is made of a cloth material that is more slippery than the occupant side wall 48 itself on the back surface 53g side so that the slip against the airbag body 47 on the back surface 53g side that is the occupant side wall part 48 side is good. Alternatively, a lubricant may be applied separately. Further, the surface 53f side, which is the left and right knees KL and KR of the driver D of the slip cloth 53, suppresses an increase in weight so that it is stably supported when contacting the left and right knees KL and KR. A cloth material that prevents slipping may be used, or an anti-slip agent may be applied.

そして、このスリップ布53は、エアバッグ46の展開膨張時、図6に示すように、収納部位としてのケース32から突出するエアバッグ本体47の乗員側(実施形態では下面47e側)において、表面53f側(実施形態では下面側)を運転者Dの左右両膝KL,KRに当てて運転者Dの左右両膝KL,KRの間を塞ぐとともに、裏面53g側(実施形態では上面側)でエアバッグ本体47を滑らせて、エアバッグ本体47の左右方向両側への展開を案内可能に、配設されるものである。そして、このスリップ布53は、第1実施形態の場合、左右方向の長さを狭めるようにスリップ布53だけで折られた弛み部55a、55aを設けるとともに、折り畳まれたエアバッグ本体47の乗員側の面(下面)60aから少なくとも左右両側の左側面60bと右側面60cとを覆って、エアバッグ本体47とともに、収納部位としてのケース32に収納されている(図3参照)。   When the airbag 46 is deployed and inflated, the slip cloth 53 has a surface on the passenger side (in the embodiment, the lower surface 47e side) of the airbag main body 47 that protrudes from the case 32 as a storage part, as shown in FIG. The 53f side (the lower surface side in the embodiment) is applied to the left and right knees KL, KR of the driver D to close the space between the left and right knees KL, KR of the driver D, and the back surface 53g side (the upper surface side in the embodiment). The airbag body 47 is slid so as to be able to guide the deployment of the airbag body 47 on both sides in the left-right direction. In the case of the first embodiment, the slip cloth 53 is provided with slack portions 55a and 55a that are folded only by the slip cloth 53 so as to narrow the length in the left-right direction, and the occupant of the folded airbag body 47. The side surface (lower surface) 60a covers at least the left side surface 60b and the right side surface 60c on both left and right sides, and is stored together with the airbag body 47 in a case 32 as a storage part (see FIG. 3).

さらに具体的には、第1実施形態の場合、スリップ布53は、左右方向の中央部位53eを、エアバッグ本体47の乗員側壁部48の前後左右の中央部位48aに、縫製や接着等により、結合させ、そして、一部(巻き込み部位)54をエアバッグ本体47と一体的に折り畳んで、他部(離脱部位55)に弛み部55aを持たせつつ、離脱部位55によって、折り畳んだエアバッグ本体47における取付部50付近を除く少なくとも左右方向の外周面を包むように、配設されている。なお、第1実施形態では、スリップ布53は、縫合糸52を使用した縫合により、エアバッグ本体47に結合されている。   More specifically, in the case of the first embodiment, the slip cloth 53 has a central portion 53e in the left-right direction and a central portion 48a on the front, rear, left and right of the occupant side wall portion 48 of the airbag main body 47 by sewing, bonding, etc. Then, the airbag body is folded by the detachment portion 55 while the other portion (detachment portion 55) is provided with the slack portion 55a while the portion (retraction portion) 54 is folded integrally with the airbag body 47. 47 is disposed so as to wrap around at least the outer peripheral surface in the left-right direction excluding the vicinity of the attachment portion 50. In the first embodiment, the slip cloth 53 is coupled to the airbag main body 47 by stitching using the suture thread 52.

第1実施形態のエアバッグ46の折り畳みを説明する。なお、折り畳み前には、予め、各ボルト40を車体側壁部49の取付孔51から突出させて、エアバッグ本体47の製造途中にインフレーター37を収納しておき、そして、エアバッグ46内にインフレーター37を収納させた状態で、エアバッグ46の折り畳みを行なう。   The folding of the airbag 46 of the first embodiment will be described. Before folding, the bolts 40 are protruded from the mounting holes 51 of the vehicle body side wall portion 49 in advance, and the inflator 37 is stored in the middle of manufacturing the airbag main body 47, and the inflator is stored in the airbag 46. The airbag 46 is folded in a state where the air bag 37 is stored.

そして、実施形態の場合、まず、図5のAに示すように、スリップ布53とともに、エアバッグ本体47の車体側壁部49と乗員側壁部48とを平らに展開させて重ねた後、図5のBに示すように、エアバッグ46(エアバッグ本体47)の前後方向の幅寸法BVを収納スペースS(ケース32)の前後方向の幅寸法SV(図2参照)に対応させるように(収納可能な寸法にするように)、エアバッグ本体47の前縁47a側と後縁47b側とを、前後方向の中央側に接近させるように折り畳む。実施形態の場合には、前縁47a側と後縁47b側とを、車体側壁部49の側で蛇腹折りしている。また、この時の前後方向の幅寸法BVは、スリップ布53の前後方向の長さ寸法LVより短くする。   In the case of the embodiment, first, as shown in A of FIG. 5, the vehicle body side wall portion 49 and the occupant side wall portion 48 of the airbag main body 47 are flatly deployed together with the slip cloth 53 and then overlapped. As shown in FIG. 2B, the width dimension BV in the front-rear direction of the airbag 46 (airbag body 47) is made to correspond to the width dimension SV (refer to FIG. 2) in the front-rear direction of the storage space S (case 32). The airbag body 47 is folded so that the front edge 47a side and the rear edge 47b side of the airbag main body 47 are close to the center side in the front-rear direction. In the case of the embodiment, the front edge 47a side and the rear edge 47b side are accordion folded at the vehicle body side wall 49 side. Further, the width dimension BV in the front-rear direction at this time is shorter than the length dimension LV in the front-rear direction of the slip cloth 53.

ついで、図5のB〜Eに示すように、エアバッグ46(エアバッグ本体47)の左右方向の幅寸法BHを収納スペースSの左右方向の幅寸法SH(図3参照)に対応させるように(収納可能な寸法にするように)、エアバッグ本体47の左縁47c側と右縁47d側とを、左右方向の中央側に接近させるように折り畳む。実施形態の場合には、まず、図5のB,Cに示すように、スリップ布53の左右両縁の左縁53cと右縁53dを、乗員側壁部48側において、対応するエアバッグ本体47の左右両縁の左縁47cと右縁47dとに重ね、一体的に、車体側壁部49の側に巻くようにロール折りして、ロール折りした折り畳み部位59を形成する。この左右両側の折り畳み部位59には、それぞれ、スリップ布53の左縁53cと右縁53dとの端側の一部が巻き込まれ、スリップ布53に折り畳み部位59に巻き込まれた巻き込み部位54が、形成されることとなる。   Next, as shown in FIGS. 5B to 5E, the lateral width BH of the airbag 46 (airbag body 47) is made to correspond to the lateral width SH of the storage space S (see FIG. 3). The airbag body 47 is folded so that the left edge 47c side and the right edge 47d side of the airbag main body 47 are close to the center side in the left-right direction. In the case of the embodiment, first, as shown in FIGS. 5B and 5C, the left and right edges 53 c and 53 d of the left and right edges of the slip cloth 53 are arranged on the side of the occupant side wall 48 and the corresponding airbag body 47. The left and right edges 47c and 47d of the left and right edges of the left and right edges of the left and right edges 47d and 47d are integrally folded and rolled around the vehicle body side wall 49 to form a folded portion 59 that is rolled. A part of the end side of the left edge 53c and the right edge 53d of the slip cloth 53 is respectively wound on the folding parts 59 on both the left and right sides, and a winding part 54 wound on the folding part 59 on the slip cloth 53, Will be formed.

その後、図5のC,Dに示すように、左右の折り畳み部位59,59を乗員側壁部48側に載せる。この時、スリップ布53は、折り畳み部位59に巻き込まれた巻き込み部位54から中央部位53e側に延びる部位を、折り畳み部位59と一体化させずに、折り畳み部位59から離脱させて、中央部位53eの左右両側に、離脱部位55,55を形成しておく。   Thereafter, as shown in C and D of FIG. 5, the left and right folded portions 59 and 59 are placed on the occupant side wall 48 side. At this time, the slip cloth 53 does not integrate the part extending from the winding part 54 wound around the folding part 59 toward the central part 53e side from the folding part 59 without being integrated with the folding part 59. Separation sites 55 and 55 are formed on both the left and right sides.

そして、これらの離脱部位55は、図5のD,Eに示すように、エアバッグ本体47の乗員側壁部48の側から車体側壁部49の取付部50側に引っ張るように、巻き付け、エアバッグ本体47の折り畳み完了体60の運転者(乗員)D側の面(車両搭載時には下面となる)60aから左右の左側面60bと右側面60cとにわたるように、スリップ布53の離脱部位55の下面カバー部56と側面カバー部57とを折り畳み完了体60に巻き付ければ、エアバッグ46の折り畳みが完了する。この時、左右の離脱部位55,55には、それぞれ、スリップ布53だけを蛇腹折り状に折り重ねて、車体側壁部49の取付部50付近まで延びる弛み部55aが、形成されることとなる。なお、スリップ布53の前縁53a側と後縁53bとは、折り畳み完了体60の運転者D側の面60aの前後に位置する前面60dと後面60eとを覆うように、曲げて配設する(図2参照)。   These separation parts 55 are wound around the airbag body so as to be pulled from the passenger side wall 48 side of the airbag main body 47 to the mounting part 50 side of the vehicle body side wall 49 as shown in FIGS. The lower surface of the separation portion 55 of the slip cloth 53 so as to extend from the driver (occupant) D side surface 60a of the folding completion body 60 of the main body 47 to the left and right left surfaces 60b and 60c. When the cover part 56 and the side cover part 57 are wound around the folding completion body 60, the folding of the airbag 46 is completed. At this time, a slack portion 55a that extends to the vicinity of the attachment portion 50 of the vehicle body side wall portion 49 by folding only the slip cloth 53 into a bellows fold shape is formed in the left and right separation portions 55, 55, respectively. . It should be noted that the front edge 53a side and the rear edge 53b of the slip cloth 53 are bent and disposed so as to cover the front surface 60d and the rear surface 60e located in front of and behind the surface 60a on the driver D side of the folded body 60. (See FIG. 2).

そして、エアバッグ46の折り畳みが完了したならば、折り崩れしないように、所定の図示しない折り崩れ防止用のラッピング材で、エアバッグ46を包む。ついで、インフレーター37のボルト40を貫通孔33aに貫通させつつ、折り畳んだエアバッグ46とインフレーター37とを天井壁33の下面側のケース32の側壁34,35間に収納し、各ボルト40に図示しないスプリングナットを取り付けて、ケース32にエアバッグ46とインフレーター37とを組み付けてエアバッグ組立体SA(図2参照)を形成する。   When the folding of the airbag 46 is completed, the airbag 46 is wrapped with a predetermined wrapping preventing wrapping material (not shown) so as not to collapse. Next, the folded airbag 46 and the inflator 37 are accommodated between the side walls 34 and 35 of the case 32 on the lower surface side of the ceiling wall 33 while the bolts 40 of the inflator 37 are passed through the through holes 33a. A spring nut is attached, and the airbag 46 and the inflator 37 are assembled to the case 32 to form the airbag assembly SA (see FIG. 2).

そして、このように組み立てたエアバッグ組立体SAを、各ボルト40をナット41止めして、ステアリングコラム3のコラムチューブ5のブラケット5aに取付固定し、エアバッグ作動回路から延びる図示しないリード線をインフレーター37の本体38に結線して、係止片34a,35aを係止孔19a,20aに挿入させて側壁19,20に係止させつつ、コラムカバー16を、ステアリングコラム3に取り付ければ、膝保護用エアバッグ装置M1を車両に搭載することができる。   The airbag assembly SA assembled in this way is fastened to the bracket 5a of the column tube 5 of the steering column 3 by fixing each bolt 40 to the nut 41, and leads (not shown) extending from the airbag operation circuit are fixed. If the column cover 16 is attached to the steering column 3 while being connected to the main body 38 of the inflator 37 and the locking pieces 34a and 35a are inserted into the locking holes 19a and 20a and locked to the side walls 19 and 20, The protective airbag device M1 can be mounted on a vehicle.

そして、車両への搭載後、第1実施形態の膝保護用エアバッグ装置M1が作動すると、インフレーター37の本体38がガス吐出口38aから膨張用ガスGを吐出させて、膨張用ガスGが、リテーナ39の左右両端の開口39aからエアバッグ46のエアバッグ本体47に供給される。そして、エアバッグ本体47に膨張用ガスGが供給されれば、エアバッグ本体47は、扉部26の下前ドア部27、下後ドア部28、左ドア部29、及び、右ドア部30を押し開き、開口させた突出用開口22から下方へ突出して展開膨張しようとする(図2の二点鎖線参照)。   When the knee protection airbag device M1 according to the first embodiment is activated after being mounted on the vehicle, the main body 38 of the inflator 37 discharges the inflation gas G from the gas discharge port 38a, and the inflation gas G The air is supplied to the airbag main body 47 of the airbag 46 from the openings 39a at both the left and right ends of the retainer 39. When the inflation gas G is supplied to the airbag body 47, the airbag body 47 has the lower front door portion 27, the lower rear door portion 28, the left door portion 29, and the right door portion 30. Is pushed open to project downward from the projecting opening 22 that is opened (see the two-dot chain line in FIG. 2).

その際、エアバッグ本体47が、図6のA,Bに示すように、左右両側へ広く展開する前に、運転者Dの左右両膝KL,KRに接触しつつ左右両膝KL,KRの間に進入しようとしても、スリップ布53が、エアバッグ本体47の折り畳み収納時、折り畳まれたエアバッグ本体47の運転者D側の面60aから少なくとも左右両側の左側面60bと右側面60cとを覆っており、迅速に弛み部55a,55aを延ばしつつ、エアバッグ本体47の運転者D側において、表面53f側を運転者Dの左右両膝KL,KRに当てて運転者Dの左膝KLと右膝KRとの間を塞ぐ。そして、スリップ布53は、図6のBと図7のAに示すように、裏面53g側でエアバッグ本体47を滑らせて、エアバッグ本体47の左右方向への展開を案内することから、エアバッグ本体47は、運転者Dの左右両膝KL,KRの間に進入することなく、左右両膝KL,KRに正対するように、左右両側に展開膨張することとなる(図7のB参照)。   At that time, as shown in FIGS. 6A and 6B, before the airbag body 47 is widely deployed to the left and right sides, the left and right knees KL and KR are in contact with the left and right knees KL and KR of the driver D. When the airbag 53 is folded and stored, the slip cloth 53 moves at least between the left side 60b and the right side 60c on the left and right sides from the driver 60 side surface 60a of the folded airbag body 47. While covering and quickly extending the slack portions 55a, 55a, on the driver D side of the airbag body 47, the surface 53f side is applied to both the left and right knees KL, KR of the driver D and the left knee KL of the driver D And the space between the right knee KR. Then, as shown in FIG. 6B and FIG. 7A, the slip cloth 53 slides the airbag body 47 on the back surface 53g side and guides the deployment of the airbag body 47 in the left-right direction. The airbag body 47 expands and inflates on both the left and right sides so as to face the left and right knees KL and KR without entering between the left and right knees KL and KR of the driver D (B in FIG. 7). reference).

したがって、第1実施形態の膝保護用エアバッグ装置M1では、エアバッグ46が展開膨張初期に運転者Dの左右両膝KL,KRに接触しても、その接触がスリップ布53だけの直接接触であって、スリップ布53が左右両膝KL,KRに接触しつつ左右両膝KL,KRの間を塞ぐことから、エアバッグ本体47が、左右両膝KL,KRを広げることなく、左右両側への展開を完了させて、クッション作用を確保して円滑に前進移動する左右両膝KL,KRを受け止めることができる。   Therefore, in the knee protecting airbag device M1 of the first embodiment, even if the airbag 46 contacts the left and right knees KL and KR of the driver D in the initial stage of deployment, the contact is only direct contact with the slip cloth 53. Since the slip cloth 53 is in contact with the left and right knees KL and KR and closes the space between the left and right knees KL and KR, the airbag main body 47 does not widen the left and right knees KL and KR. The left and right knees KL and KR that smoothly move forward with a cushioning action can be received.

なお、図7のBに示すように、コラムカバー16に接近していない状態で十分離れて着座していた運転者D0に対しては、エアバッグ本体47が、運転者DOの左右両膝KL,KR(一点鎖線参照)に、直接接触は勿論のこと、スリップ布53を介在させた間接接触もしない状態で、運転者D0の左右両膝KL,KRに正対するように、左右両側に展開膨張することもできる。   As shown in FIG. 7B, for the driver D0 who is seated sufficiently away without approaching the column cover 16, the airbag body 47 is connected to the left and right knees KL of the driver DO. , KR (refer to the alternate long and short dash line), in addition to direct contact, as well as indirect contact with the slip cloth 53 interposed, the right and left knees KL, KR of the driver D0 is faced to the right and left to expand It can also expand.

そして、第1実施形態の場合、スリップ布53は、エアバッグ本体47の乗員側壁部48に、対応する左右方向の左縁53c,47c相互と右縁53d、47d相互とを、それぞれ、重ねた状態で、エアバッグ本体47のそれぞれの左右の左縁47cと右縁47dとを左右方向の中央側へ接近させるように折り畳む折り畳み部位59に、それぞれ、スリップ布53の左右両縁の左縁53c側と右縁53d側の端末の一部だけを、巻き込ませた巻き込み部位54を形成して、エアバッグ本体47とともに、ケース32に収納されている(図5,3参照)。   In the case of the first embodiment, the slip cloth 53 overlaps the corresponding left and right left edges 53c and 47c and the right edges 53d and 47d on the occupant side wall 48 of the airbag body 47, respectively. In the state, the left and right left edges 53c of the slip cloth 53 are respectively connected to the folding portions 59 that fold the left and right left edges 47c and 47d of the airbag main body 47 so as to approach the center in the left-right direction. Only a part of the terminal on the side of the side and the right edge 53d is formed to form a winding portion 54 and is housed in the case 32 together with the airbag main body 47 (see FIGS. 5 and 3).

そのため、スリップ布53の左右両縁の左縁53c側と右縁53d側とが、巻き込み部位54を利用して、エアバッグ本体47の折り畳み部位59に保持された状態となり、エアバッグ本体47の膨張初期に、スリップ布53における運転者Dの左右両膝KL,KRに接触する接触部位55b,55b(図6のA参照)が、それぞれ、移動軌跡を安定させることができ、運転者Dの乗員の左右両膝KL,KRに対して、的確に接触し、かつ、左右両膝KL,KRから支持されることができて、スリップ布53の裏面53g側でのエアバッグ本体47の展開案内を確実に行うことができる。なお、このスリップ布53は、弛み部55a,55aを設けて、スリップ布53の左右両縁側の巻き込み部位54,54を、エアバッグ本体47の折り畳み部位59,59に巻き込ませているだけであって、エアバッグ本体47の左右方向への展開時におけるスリップ布53の裏面53g側を滑る相対移動は、規制されることなく、スリップ布53が弛み部55aの長さ分の余裕により、自由に行なわれる。   Therefore, the left edge 53c side and the right edge 53d side of the left and right edges of the slip cloth 53 are held in the folded portion 59 of the airbag body 47 using the winding portion 54, and the airbag body 47 In the initial stage of inflation, the contact portions 55b and 55b (see A in FIG. 6) of the slip cloth 53 that contact the left and right knees KL and KR of the driver D can stabilize the movement trajectory, respectively. Deployment guide of the airbag main body 47 on the back surface 53g side of the slip cloth 53, which can accurately contact the left and right knees KL and KR of the occupant and can be supported from the left and right knees KL and KR. Can be performed reliably. The slip cloth 53 is provided only with the slack portions 55a and 55a so that the winding portions 54 and 54 on the left and right edges of the slip cloth 53 are wound around the folding portions 59 and 59 of the airbag main body 47. Thus, the relative movement of sliding on the back surface 53g side of the slip cloth 53 when the airbag main body 47 is deployed in the left-right direction is not restricted, and the slip cloth 53 can be freely adjusted by the margin of the slack portion 55a. Done.

また、スリップ布53の平らに展開した左右方向の長さ寸法LHは、エアバッグ46の展開膨張時、収納部位としてのケース32から突出するエアバッグ本体47の乗員側において、表面53f側を運転者Dの左右両膝KL,KRに当てて運転者Dの左右両膝KL,KRの間を塞ぎ可能であれば、少なくとも、着座した運転者Dの左右両膝KL,KRをともに前方側から十分に覆える左右方向の幅寸法WKL(図7のB参照)以上として、平らに展開したエアバッグ本体47の左右方向の長さ寸法DHより若干短い寸法としてもよい。すなわち、エアバッグ本体47自体は、展開膨張を完了させた状態で、運転者D・D0の左右両膝KL,KRを保護可能な左右方向の長さ寸法を確保されて設定されており、その膨張時の左右方向の長さ寸法より、エアバッグ本体47は、非膨張の平らに展開させた状態の左右方向の長さ寸法DHが長くなる。そしてさらに、その平らに展開したエアバッグ本体47の左右方向の長さ寸法DHより若干短い寸法を含めた同等以上に、スリップ布53における平らに展開した状態での左右方向の長さ寸法LHが設定されていれば、スリップ布53は、エアバッグ46の展開膨張時に、確実に運転者Dの左右両膝KL,KRに当てる状態を、確保できることとなる。   Further, the length dimension LH in the left-right direction in which the slip cloth 53 is deployed flatly operates on the surface 53f side on the passenger side of the airbag main body 47 protruding from the case 32 as a storage part when the airbag 46 is deployed and inflated. If the left and right knees KL and KR of the driver D can be closed against the left and right knees KL and KR of the driver D, at least both the left and right knees KL and KR of the driver D seated from the front side The width dimension WKL in the left-right direction that can be sufficiently covered (see B in FIG. 7) or more may be slightly shorter than the length dimension DH in the left-right direction of the airbag body 47 that is flatly deployed. In other words, the airbag main body 47 itself is set in such a manner that a length dimension in the left and right direction capable of protecting the left and right knees KL and KR of the driver D / D0 is secured in a state where the deployment and inflation are completed. The airbag body 47 has a length dimension DH in the left-right direction in a state in which the airbag body 47 is unflattened and flattened is longer than the length dimension in the left-right direction at the time of inflation. Further, the length dimension LH in the lateral direction of the slip cloth 53 in the flatly deployed state is equal to or greater than that including a dimension slightly shorter than the length dimension DH in the lateral direction of the airbag body 47 that is flatly deployed. If it is set, the slip cloth 53 can be surely secured to the driver D on both the left and right knees KL and KR when the airbag 46 is deployed and inflated.

また、このスリップ布53は、エアバッグ本体47の展開途中の案内を行えれば、エアバッグ本体47の膨張完了後には、不要となることから、必ずしも、エアバッグ本体47と結合させていなくとも良い。   Further, if the slip cloth 53 can guide the airbag body 47 in the middle of its deployment, the slip cloth 53 becomes unnecessary after the airbag body 47 is completely inflated. good.

但し、第1実施形態のように、スリップ布53の左右方向の中央部位53eをエアバッグ本体47の乗員側壁部48の左右方向の中央部位48aに、結合させたり、あるいは、図8〜10に示す第2実施形態の膝保護用エアバッグ装置M2のエアバッグ46Aや図11〜13に示す第3実施形態の膝保護用エアバッグ装置M3のエアバッグ46Bのように、スリップ布53A,53Bの左右方向の左縁53cと右縁53dとの少なくとも一方を、対応するエアバッグ本体47A,47Bの左右方向の左縁47cや右縁47dに、結合させて、スリップ布53,53A,53Bをエアバッグ本体47,47A,47Bの一部に結合させておけば、エアバッグ本体47,47A,47Bの展開途中に、エアバッグ本体47,47A,47Bの運転者D側からスリップ布53が外れる虞れが無くなり、一層、安定したエアバッグ本体47,47A,47Bの左右方向への展開を確保でき、また、運転者D側へのスリップ布53.53A,53Bの飛散も防止できる。   However, as in the first embodiment, the center part 53e in the left-right direction of the slip cloth 53 is joined to the center part 48a in the left-right direction of the occupant side wall 48 of the airbag body 47, or as shown in FIGS. As shown in the airbag 46A of the knee protection airbag device M2 of the second embodiment shown and the airbag 46B of the knee protection airbag device M3 of the third embodiment shown in FIGS. At least one of the left edge 53c and the right edge 53d in the left-right direction is coupled to the left edge 47c and the right edge 47d in the left-right direction of the corresponding airbag main body 47A, 47B, so that the slip cloths 53, 53A, 53B are If the airbag body 47, 47A, 47B is coupled to a part of the airbag body 47, 47A, 47B, the airbag body 47, 47A, 47B is operated during the deployment of the airbag body 47, 47A, 47B. There is no possibility that the slip cloth 53 will come off from the D side, and further stable deployment of the airbag main bodies 47, 47A, 47B in the left-right direction can be secured, and the slip cloth 53.53A, 53B toward the driver D side can be secured. Can also be prevented.

そして、第1実施形態のように、スリップ布53の左右方向の中央部位53eをエアバッグ本体47の乗員側壁部48の左右方向の中央部位48eに、結合させる場合には、スリップ布53の左右両縁の左縁53cと右縁53dとが、エアバッグ本体47に結合されていないことから、エアバッグ本体47の左右両縁の左縁47c付近と右縁47d付近の折りの解消時、左右方向への展開が、図6のB,図7のAに示すように、スリップ布53の抵抗を受けず、バランス良く迅速に行われる。   Then, as in the first embodiment, when the left and right central portion 53e of the slip cloth 53 is coupled to the left and right central portion 48e of the occupant side wall 48 of the airbag body 47, Since the left edge 53c and the right edge 53d of both edges are not coupled to the airbag main body 47, the left and right edges of the airbag main body 47 near the left edge 47c and the right edge 47d are unfolded when the folding is eliminated. As shown in FIG. 6B and FIG. 7A, the development in the direction is performed quickly with good balance without receiving the resistance of the slip cloth 53.

一方、図11〜13に示す第3実施形態のエアバッグ46Bのように、スリップ布53Bの左右方向の縁の少なくとも一方の左縁53cを、対応するエアバッグ本体47Bの左右方向の左縁47cに、結合させる場合には、エアバッグ46Bの展開膨張時、エアバッグ本体47Bのスリップ布53Bと結合されている左縁47c付近では、スリップ布53Bから展開時の抵抗を受けるものの、図13に示すように、展開完了時まで、確実に、エアバッグ本体47Bの運転者D側にスリップ布53Bを配置させておくことができて、エアバッグ本体47Bが、中央部位48a付近からスリップ布53Bに結合された左右方向の左縁47cまでの全域にわたり、スリップ布53Bの裏面53g側によって円滑に展開を案内されることとなる。   On the other hand, like the airbag 46B of the third embodiment shown in FIGS. 11 to 13, the left edge 53c of at least one of the edges in the left-right direction of the slip cloth 53B is connected to the left edge 47c in the left-right direction of the corresponding airbag body 47B. When the airbag 46B is deployed and inflated, a resistance at the time of deployment is received from the slip cloth 53B in the vicinity of the left edge 47c coupled to the slip cloth 53B of the airbag body 47B. As shown, the slip cloth 53B can be reliably placed on the driver D side of the airbag main body 47B until the deployment is completed, and the airbag main body 47B is moved from the vicinity of the central portion 48a to the slip cloth 53B. Development is smoothly guided by the back surface 53g side of the slip cloth 53B over the entire region up to the combined left and right left edge 47c.

勿論、図8〜10に示す第2実施形態の膝保護用エアバッグ装置M2のエアバッグ46Aのように、スリップ布53Aの左右両縁の左縁53cと右縁53dとを、対応するエアバッグ本体47Aの左縁47cと右縁47dとに、結合させる場合には、エアバッグ46Aの展開膨張時、エアバッグ本体47Aのスリップ布53Aと結合されている左縁47c付近と右縁47d付近では、スリップ布53Aから展開時の抵抗を受けるものの、図10に示すように、展開完了時まで、確実に、エアバッグ本体47Aの運転者D側にスリップ布53Aを配置させておくことができて、エアバッグ本体47Aが、スリップ布53Aに結合される左右方向の左縁47cから右縁47dまでの全域にわたり、スリップ布53Aの裏面53g側によって円滑に展開を案内されることとなる。   Of course, like the airbag 46A of the knee protecting airbag device M2 of the second embodiment shown in FIGS. 8 to 10, the left and right edges 53c and 53d of the left and right edges of the slip cloth 53A are associated with corresponding airbags. When connecting the left edge 47c and the right edge 47d of the main body 47A, when the airbag 46A is deployed and inflated, in the vicinity of the left edge 47c and the right edge 47d connected to the slip cloth 53A of the airbag main body 47A. Although the resistance at the time of deployment is received from the slip cloth 53A, as shown in FIG. 10, the slip cloth 53A can be surely arranged on the driver D side of the airbag main body 47A until the deployment is completed. The air bag body 47A is smoothly moved by the back surface 53g side of the slip cloth 53A over the entire region from the left edge 47c in the left-right direction to the right edge 47d coupled to the slip cloth 53A. So that the guided open.

なお、第2,3実施形態の膝保護用エアバッグ装置M2,M3は、エアバッグ46A,46Bのエアバッグ本体47A,47Bに対するスリップ布53A,53Bの結合箇所が相違するだけで、他の構成は第1実施形態と同様であり、また、第1実施形態と同様に車両に搭載することから、説明を省略する。   Note that the knee protection airbag devices M2 and M3 of the second and third embodiments have other configurations except that the slip cloths 53A and 53B are connected to the airbag bodies 47A and 47B of the airbags 46A and 46B. Is the same as that of the first embodiment, and since it is mounted on the vehicle as in the first embodiment, description thereof is omitted.

さらに、第1実施形態では、第2,3実施形態も同様であるが、作動時、収納されたエアバッグ46を、収納部位としてのケース32から下方に突出させるとともに左右両側に展開させて膨張させるように、インパネ7から後方へ突出するステアリングコラム3を覆うコラムカバー16の下部16a側に、搭載させて、ステアリングコラム付けの膝保護用エアバッグ装置M1として構成されている。このステアリングコラム付けの構成では、乗員としての運転者Dの左右両膝KL,KRとコラムカバー16に配置させる収納部位としてのケース32との距離が短く、展開膨張するエアバッグ46が、運転者Dの左右両膝KL,KRの間へ進入する虞れが大きい。しかし、第1実施形態では、左右両膝KL,KRを保護可能なエアバッグ本体47を、スリップ布53を利用して、左右両膝KL,KRの間に進入させることなく、安定して左右両側へ展開膨張させることが可能となって、好適に使用することができる。   Furthermore, in the first embodiment, the same applies to the second and third embodiments, but during operation, the stored airbag 46 protrudes downward from the case 32 as a storage part and is expanded to the left and right sides to inflate. In this manner, the knee protection airbag device M1 with a steering column is mounted on the lower portion 16a side of the column cover 16 that covers the steering column 3 protruding rearward from the instrument panel 7. In this steering column mounting configuration, the distance between the left and right knees KL, KR of the driver D as the occupant and the case 32 as the storage portion to be disposed on the column cover 16 is short, and the airbag 46 that is deployed and inflated is used by the driver. There is a high possibility of entering between the left and right knees KL and KR of D. However, in the first embodiment, the airbag main body 47 that can protect the left and right knees KL and KR can be stably left and right without using the slip cloth 53 to enter between the left and right knees KL and KR. It can be expanded and expanded on both sides, and can be suitably used.

さらに、第1実施形態の場合(第2,3実施形態も同様である)、エアバッグ本体47内に、膨張用ガスGを供給するインフレーター37を収納させるとともに、展開膨張完了時のエアバッグ本体47の左右両縁の左縁47c側や右縁47d側における左右方向へ接近させる折り畳み部位59,59の少なくとも一部59aを、図3に示すように、それぞれ、インフレーター37の下方で左右方向に並設させるように、隣接して配設させて、エアバッグ46がケース32に収納されている。すなわち、図6のC〜Eに示すように、スリップ布53の巻き込み部位54とともに、エアバッグ本体47の左右の折り畳み部位59,59を乗員側壁部48側に載せて折り畳んでいる。このような構成では、折り畳んだエアバッグ46とインフレーター37との左右方向の幅寸法BHを小さくすることができて、搭載スペースに制限のあるステアリングコラム3付けの膝保護用エアバッグ装置M1として、一層、好適に使用することができる。   Further, in the case of the first embodiment (the same applies to the second and third embodiments), an inflator 37 for supplying the inflation gas G is housed in the airbag body 47, and the airbag body at the time of completion of deployment and inflation is stored. As shown in FIG. 3, at least a part 59a of the folding portions 59, 59 that are made to approach in the left-right direction on the left edge 47c side and the right edge 47d side of the left and right edges of the left and right edges 47 respectively in the left-right direction below the inflator 37 The airbag 46 is accommodated in the case 32 so as to be arranged adjacent to each other. That is, as shown in C to E of FIG. 6, the left and right folding portions 59, 59 of the airbag main body 47 are folded on the occupant side wall 48 side together with the winding portion 54 of the slip cloth 53. In such a configuration, the width dimension BH in the left-right direction between the folded airbag 46 and the inflator 37 can be reduced, and as a knee protection airbag device M1 with a steering column 3 with a limited mounting space, Further, it can be suitably used.

勿論、本発明に係る膝保護用エアバッグ装置としては、インパネ7におけるコラムカバー16の下方のロアパネル9の部位に搭載したり、あるいは、助手席の前方のインパネ7の部位に搭載してもよい。   Of course, the knee protection airbag device according to the present invention may be mounted on the lower panel 9 of the instrument panel 7 below the column cover 16 or may be mounted on the instrument panel 7 in front of the passenger seat. .

本発明に係る第1実施形態の膝保護用エアバッグ装置が搭載されたコラムカバー付近の概略側面図である。1 is a schematic side view of the vicinity of a column cover on which a knee protecting airbag device according to a first embodiment of the present invention is mounted. 第1実施形態の膝保護用エアバッグ装置が搭載されているコラムカバー付近の前後方向に沿った概略拡大縦断面図である。It is a general | schematic expanded longitudinal cross-sectional view along the front-back direction of the column cover vicinity in which the airbag apparatus for knee protection of 1st Embodiment is mounted. 第1実施形態の膝保護用エアバッグ装置が搭載されているコラムカバー付近の左右方向に沿った概略拡大縦断面図である。It is a general | schematic expanded longitudinal cross-sectional view along the left-right direction of the column cover vicinity in which the airbag apparatus for knee protection of 1st Embodiment is mounted. 第1実施形態の膝保護用エアバッグ装置に使用するエアバッグとエアバッグの構成材料を示す平面図である。It is a top view which shows the constituent material of the airbag used for the airbag apparatus for knee protection of 1st Embodiment, and an airbag. 第1実施形態の膝保護用エアバッグ装置に使用するエアバッグの折り畳み工程を説明する図である。It is a figure explaining the folding process of the airbag used for the airbag apparatus for knee protection of 1st Embodiment. 第1実施形態の膝保護用エアバッグ装置の作動時を順に示す概略縦断面図である。It is a schematic longitudinal cross-sectional view which shows the time of the action | operation of the knee protection airbag apparatus of 1st Embodiment in order. 第1実施形態の膝保護用エアバッグ装置の作動時を順に示す概略縦断面図であり、図6の後の状態を示す。It is a schematic longitudinal cross-sectional view which shows the time of the action | operation of the knee protection airbag apparatus of 1st Embodiment in order, and shows the state after FIG. 第2実施形態の膝保護用エアバッグ装置が搭載されているコラムカバー付近の左右方向に沿った概略拡大縦断面図である。It is a general | schematic expanded longitudinal cross-sectional view along the left-right direction of the column cover vicinity in which the airbag apparatus for knee protection of 2nd Embodiment is mounted. 第2実施形態の膝保護用エアバッグ装置の作動時を順に示す概略縦断面図である。It is a schematic longitudinal cross-sectional view which shows in order the action | operation time of the airbag apparatus for knee protection of 2nd Embodiment. 第2実施形態の膝保護用エアバッグ装置の作動時を順に示す概略縦断面図であり、図9の後の状態を示す。It is a schematic longitudinal cross-sectional view which shows the time of the action | operation of the knee protection airbag apparatus of 2nd Embodiment in order, and shows the state after FIG. 第3実施形態の膝保護用エアバッグ装置が搭載されているコラムカバー付近の左右方向に沿った概略拡大縦断面図である。It is a general | schematic expanded longitudinal cross-sectional view along the left-right direction of the column cover vicinity in which the airbag apparatus for knee protection of 3rd Embodiment is mounted. 第3実施形態の膝保護用エアバッグ装置の作動時を順に示す概略縦断面図である。It is a schematic longitudinal cross-sectional view which shows the time of the action | operation of the airbag apparatus for knee protection of 3rd Embodiment in order. 第3実施形態の膝保護用エアバッグ装置の作動時を順に示す概略縦断面図であり、図12の後の状態を示す。It is a schematic longitudinal cross-sectional view which shows at the time of the action | operation of the airbag apparatus for knee protection of 3rd Embodiment in order, and shows the state after FIG.

符号の説明Explanation of symbols

3…ステアリングコラム、
16…コラムカバー、
16a…(コラムカバーの)下部、
32…(収納部位)ケース、
37…インフレーター、
46・46A・46B…エアバッグ、
47・47A・47B…エアバッグ本体、
48…運転者側壁部、
49…コラム側壁部、
53…スリップ布、
53f…(スリップ布の)表面、
53g…(スリップ布の)裏面、
54…巻き込み部位、
55a…弛み部、
59…折り畳み部位、
D…(乗員)運転者、
K(KL・KR)…膝(KL…左膝、KR…右膝)、
M1・M2・M3…膝保護用エアバッグ装置。
3 ... Steering column,
16 ... Column cover,
16a ... the lower part of the column cover,
32 ... (storage part) case,
37 ... Inflator,
46 ・ 46A ・ 46B… Airbag,
47 · 47A · 47B… Airbag body,
48 ... Driver side wall,
49 ... Column side wall,
53 ... slip cloth,
53f ... surface (of slip cloth),
53g ... back side of slip cloth,
54 ... entrainment site,
55a ... Loose part,
59 ... Folding part,
D ... (Crew) Driver,
K (KL · KR) ... knee (KL ... left knee, KR ... right knee),
M1, M2, M3 ... Knee protecting airbag devices.

Claims (6)

膨張用ガスを供給されて展開膨張を完了させた際、着座した乗員の左右の膝の前方側に配置されるエアバッグを備え、
該エアバッグが、膨張完了時の左右方向の両縁側を中央側に接近させて膨張完了時より左右方向の幅寸法を狭くするように折り畳んで、乗員の左右両膝の間における前方側のエリアに配置された収納部位に、収納される膝保護用エアバッグ装置であって、
前記エアバッグが、
膨張完了時に乗員側に配置される乗員側壁部と車体側に配置される車体側壁部とを備えて板状に膨張するエアバッグ本体と、
展開膨張時の前記エアバッグ本体の乗員側に配置される可撓性を有したスリップ布と、
を備えて構成され、
前記スリップ布が、
前記エアバッグの展開膨張時、前記収納部位から突出する前記エアバッグ本体の前記乗員側において、表面側を前記乗員の左右の膝に当てて前記乗員の左右両膝の間を塞ぐとともに、裏面側で前記エアバッグ本体を滑らせて、前記エアバッグ本体の左右方向両側への展開を案内可能に、
左右方向の長さを狭めるように前記スリップ布だけで折られた弛み部を設けるとともに、折り畳まれた前記エアバッグ本体の乗員側の面から少なくとも左右両側面を覆って、前記エアバッグ本体とともに前記収納部位に収納されるとともに、
平らに展開した左右方向の長さ寸法を、前記エアバッグの展開膨張時、前記収納部位から突出する前記エアバッグ本体の前記乗員側において、表面側を前記乗員の左右の膝に当てて前記乗員の左右両膝の間を塞ぎ可能な寸法に、設定されていることを特徴とする膝保護用エアバッグ装置。
When the inflation gas is supplied to complete the deployment and inflation, the airbag is disposed on the front side of the left and right knees of the seated occupant,
The front side area between the left and right knees of the occupant when the airbag is folded so that both side edges in the left and right direction when the inflation is completed approach the center side and the width dimension in the left and right direction is narrower than when the inflation is completed A knee protection airbag device to be stored in the storage portion disposed in
The airbag is
An airbag main body that includes an occupant side wall portion that is disposed on the occupant side and a vehicle body side wall portion that is disposed on the vehicle body side when the inflation is completed;
A flexible slip cloth disposed on the occupant side of the airbag body during deployment and inflation;
Configured with
The slip cloth is
When the airbag is deployed and inflated, on the occupant side of the airbag body projecting from the storage part, the front side is applied to the left and right knees of the occupant to close the space between the left and right knees of the occupant, and the back side The airbag body can be slid to guide the deployment of the airbag body on both sides in the left-right direction.
Provided with a slack portion folded only by the slip cloth so as to narrow the length in the left-right direction, covering at least the left and right side surfaces from the occupant side surface of the folded airbag body, together with the airbag body While being stored in the storage part,
When the airbag is deployed and inflated, when the airbag is deployed and inflated, the occupant side of the airbag body protrudes from the storage portion so that the surface side is applied to the left and right knees of the occupant. An air bag device for protecting a knee, characterized in that it is set to a size capable of closing between the left and right knees.
前記スリップ布が、前記エアバッグ本体の乗員側壁部に、対応する左右方向の両縁相互を重ねた状態で、前記エアバッグ本体のそれぞれの左右両縁における左右方向の中央側へ接近させるように折り畳む折り畳み部位に、それぞれ、前記スリップ布の左右両縁側の一部だけを、巻き込ませた巻き込み部位を形成して、前記エアバッグ本体とともに、前記収納部位に収納されていることを特徴とする請求項1に記載の膝保護用エアバッグ装置。   The slip cloth is made to approach the center side in the left-right direction at each of the left and right edges of the airbag body, with the corresponding left and right edges overlapping each other on the passenger side wall of the airbag body. Each of the folding parts to be folded is formed in a part where only the left and right edges of the slip cloth are involved, and is housed in the housing part together with the airbag body. Item 2. The knee protection airbag device according to Item 1. 前記スリップ布が、左右方向の中央部位を前記エアバッグ本体の乗員側壁部の左右方向の中央部位に、結合させて配設されていることを特徴とする請求項2に記載の膝保護用エアバッグ装置。   3. The knee protection air according to claim 2, wherein the slip cloth is disposed by connecting a central portion in the left-right direction to a central portion in the left-right direction of an occupant side wall portion of the airbag body. Bag device. 前記スリップ布が、左右方向の縁の少なくとも一方を、対応する前記エアバッグ本体の左右方向の縁に、結合させて配設されていることを特徴とする請求項2に記載の膝保護用エアバッグ装置。   3. The knee protection air according to claim 2, wherein the slip cloth is disposed by connecting at least one of the left and right edges to the corresponding left and right edges of the airbag body. Bag device. 作動時、収納された前記エアバッグを、収納部位から下方に突出させるとともに左右両側に展開させて膨張させるように、インストルメントパネルから後方へ突出するステアリングコラムを覆うコラムカバーの下部側に、搭載されていることを特徴とする請求項1乃至請求項4のいずれか1項に記載の膝保護用エアバッグ装置。   Mounted on the lower side of the column cover that covers the steering column that protrudes backward from the instrument panel so that the stored airbag protrudes downward from the storage part and expands and expands to the left and right sides during operation. The knee protection airbag device according to any one of claims 1 to 4, wherein the knee protection airbag device is provided. 前記エアバッグ本体内に、膨張用ガスを供給するインフレーターが収納され、
展開膨張完了時の前記エアバッグ本体の左右両縁側における左右方向の中央側へ接近させる折り畳み部位の少なくとも一部が、それぞれ、前記インフレーターの下方で左右方向に並設させるように、隣接して配設されて、
前記エアバッグが前記収納部位に収納されていることを特徴とする請求項5に記載の膝保護用エアバッグ装置。
An inflator that supplies inflation gas is housed in the airbag body,
At least a part of the folded part that approaches the center side in the left-right direction on both the left and right edges of the airbag body when deployment and inflation are completed is arranged adjacently so as to be juxtaposed in the left-right direction below the inflator. Established
The knee protection airbag device according to claim 5, wherein the airbag is stored in the storage portion.
JP2006355514A 2006-11-14 2006-12-28 Knee protecting airbag device Withdrawn JP2008162464A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2006355514A JP2008162464A (en) 2006-12-28 2006-12-28 Knee protecting airbag device
US11/979,752 US20080116669A1 (en) 2006-11-14 2007-11-08 Knee-protecting airbag device
DE102007054061A DE102007054061A1 (en) 2006-11-14 2007-11-13 Knee-protecting airbag device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006355514A JP2008162464A (en) 2006-12-28 2006-12-28 Knee protecting airbag device

Publications (1)

Publication Number Publication Date
JP2008162464A true JP2008162464A (en) 2008-07-17

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Country Status (1)

Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010064357A1 (en) * 2008-12-01 2010-06-10 オートリブ ディベロップメント エービー Airbag device
US10272893B2 (en) 2014-06-04 2019-04-30 Robert Bosch Gmbh Sensor device for an electromechanical brake booster, and method for ascertaining a torque loss of an electromechanical brake booster of a braking system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010064357A1 (en) * 2008-12-01 2010-06-10 オートリブ ディベロップメント エービー Airbag device
EP2353948A1 (en) * 2008-12-01 2011-08-10 Autoliv Development AB Airbag device
JPWO2010064357A1 (en) * 2008-12-01 2012-05-10 オートリブ ディベロップメント エービー Airbag device
EP2353948A4 (en) * 2008-12-01 2012-12-05 Autoliv Dev Airbag device
KR101331977B1 (en) 2008-12-01 2013-11-25 오토리브 디벨로프먼트 에이비 Airbag device
US8602447B2 (en) 2008-12-01 2013-12-10 Autoliv Development Ab Airbag device
US10272893B2 (en) 2014-06-04 2019-04-30 Robert Bosch Gmbh Sensor device for an electromechanical brake booster, and method for ascertaining a torque loss of an electromechanical brake booster of a braking system

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