JP2006298123A - Air bag and air bag device - Google Patents

Air bag and air bag device Download PDF

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JP2006298123A
JP2006298123A JP2005121915A JP2005121915A JP2006298123A JP 2006298123 A JP2006298123 A JP 2006298123A JP 2005121915 A JP2005121915 A JP 2005121915A JP 2005121915 A JP2005121915 A JP 2005121915A JP 2006298123 A JP2006298123 A JP 2006298123A
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airbag
occupant
air bag
protection part
gas
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JP5053520B2 (en
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Juichi Umehara
寿一 梅原
Minoru Oda
実 尾田
Hiroyuki Iwamoto
寛行 岩本
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Nihon Plast Co Ltd
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Nihon Plast Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an air bag and an air bag device effectively protecting an occupant while reducing a manufacturing cost. <P>SOLUTION: The air bag 1 is expanded and deployed from the air bag device 2 provided on a panel of a vehicular room 4 to oppose to a lower limb of an occupant A. The air bag 1 is provided with partition walls over the whole length in a width direction on the inside of an air bag main body portion 30, and structures a lower protecting portion 41, a middle protecting portion 42, and an upper protecting portion 43. A circulating portion 45 is formed on each partition wall 31, 32. The lower part protecting portion 41 prevents the occupant A from getting into a lower part. The upper protecting portion 43 prevents the movement of the occupant A by restraining knee portion A2. The middle protecting portion 42 is set to have smaller volume at the time of deployment that the other protecting portions 41, 43, and reduces pressure to a shin portion A3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、例えば、自動車の乗員の下肢部に対向して展開するエアバッグ及びエアバッグ装置に関する。   The present invention relates to an airbag and an airbag apparatus that are deployed to face a lower limb portion of an occupant of an automobile, for example.

従来、自動車の座席に着座した乗員の膝部などに対向してエアバッグを展開する膝保護用エアバッグ装置であるいわゆるニーエアバッグ装置が知られている。このニーエアバッグ装置は、例えば、インストルメントパネルの、運転席前方のステアリングホイールの下方、あるいは、助手席前方のグローブボックスの下方などに配置され、制御装置が車両の前方衝突などの衝撃を検出した際に、折り畳んで収納したエアバッグをインストルメントパネルと乗員の膝部との間に展開し、乗員の膝部などを拘束して保護するようになっている（例えば、特許文献１参照。）。そして、このエアバッグは、１枚の織布を折り返し、周縁部を縫合して袋状とするとともに、エアバッグの内側に複数枚の帯状のテザーを縫着し、エアバッグが展開した際の厚さ寸法を規制している。
特開２００３−２０５８１６号公報 （第４−５頁、図５−図６） 2. Description of the Related Art Conventionally, a so-called knee airbag device, which is a knee protection airbag device that deploys an airbag facing an occupant's knee or the like seated on an automobile seat, is known. This knee airbag device is disposed, for example, below the steering wheel in front of the driver's seat or below the glove box in front of the passenger seat on the instrument panel, and the control device detects an impact such as a frontal collision of the vehicle. When the airbag is folded, the airbag stored in a folded state is deployed between the instrument panel and the occupant's knee, and the occupant's knee is restrained and protected (see, for example, Patent Document 1). ). Then, this airbag has a bag-like shape by folding one sheet of woven fabric and stitching the periphery, and a plurality of strip-shaped tethers are sewn inside the airbag so that the airbag is deployed. The thickness dimension is regulated.
JP 2003-205816 A (Page 4-5, FIG. 5 to FIG. 6)

上記従来の構成では、テザーにより展開時の厚さ寸法は規制されるものの、エアバッグの内側は一個の気室となるため、展開したエアバッグに膝部が強い力で当接すると、膝部が底付き、すなわちインストルメントパネルに当接する可能性がある。そこで、エアバッグの体積を大きくすることが考えられるが、エアバッグの取付位置やエアバッグの展開時における座席や内装部材などのレイアウトにより、エアバッグの大型化は制約を受ける場合があるとともに、エアバッグが大型化すると、エアバッグにガスを供給するインフレータの出力を大きくする必要があり、装置が大型化するとともに製造コストが上昇する問題を有している。   In the above conventional configuration, although the thickness dimension at the time of deployment is regulated by the tether, since the inside of the airbag becomes one air chamber, when the knee comes into contact with the deployed airbag with a strong force, the knee May bottom, i.e. abut against the instrument panel. Therefore, it is conceivable to increase the volume of the airbag, but the enlargement of the airbag may be restricted depending on the mounting position of the airbag and the layout of the seat and interior members when the airbag is deployed, When the size of the airbag is increased, it is necessary to increase the output of the inflator that supplies gas to the airbag, which increases the size of the device and increases the manufacturing cost.

本発明は、このような点に鑑みなされたもので、乗員を効果的に保護できるエアバッグ及びエアバッグ装置を提供することを目的とする。   This invention is made in view of such a point, and it aims at providing the airbag and airbag apparatus which can protect a passenger | crew effectively.

請求項１記載のエアバッグは、ガスを供給され取付面部と着席した乗員の下肢部との間に展開するエアバッグとを備え、このエアバッグは、乗員の膝部に対向して展開する上部保護部と、この上部保護部の下側に位置して展開する下部保護部と、これら保護部同士の間を前記エアバッグの全幅にわたり区画するとともに前記ガスが挿通可能な通気部を設けた隔壁部とを備えるものである。   The airbag according to claim 1 includes an airbag that is supplied with gas and is deployed between a mounting surface portion and a lower limb portion of a seated occupant, and the airbag is an upper portion that is deployed to face the knee portion of the occupant. A partition provided with a protective part, a lower protective part which is positioned below the upper protective part and deploys, and a ventilation part which partitions between the protective parts over the entire width of the airbag and through which the gas can be inserted Part.

そして、この構成では、エアバッグが展開した状態で、上部保護部により着席した乗員の膝部を拘束し、乗員の移動を抑制するとともに、下部保護部により、乗員が上部保護部の下側に潜り込むように移動することが防止される。上部保護部には、慣性による乗員の荷重の多くが加わるが、エアバッグの内側は隔壁部により区画され、保護部同士の間でのガスの流通が規制されるため、上部保護部の過度に早い収縮が抑制され、乗員が安定して支持される。このため、エアバッグの体積を必要以上に大きくする必要がなく、製造コストが低減される。   In this configuration, the knee of the occupant seated by the upper protection part is restrained with the airbag deployed, and the movement of the occupant is suppressed, and the occupant is placed below the upper protection part by the lower protection part. It is prevented from moving so as to sink. Although much of the passenger's load due to inertia is applied to the upper protective part, the inside of the airbag is partitioned by a partition part, and the flow of gas between the protective parts is restricted, so the upper protective part is excessive Fast contraction is suppressed and the occupant is stably supported. For this reason, it is not necessary to increase the volume of the airbag more than necessary, and the manufacturing cost is reduced.

請求項２記載のエアバッグは、請求項１記載のエアバッグにおいて、エアバッグは、上部保護部と下部保護部との間に位置しこれら上部保護部及び下部保護部よりも展開時の体積が小さい中間保護部と、前記中間保護部と前記上部保護部との間及び前記中間保護部と前記下部保護部との間を区画する隔壁部とを備えるものである。   The airbag according to claim 2 is the airbag according to claim 1, wherein the airbag is located between the upper protection portion and the lower protection portion and has a volume at the time of deployment that is larger than those of the upper protection portion and the lower protection portion. A small intermediate protection part, and a partition part partitioning between the intermediate protection part and the upper protection part and between the intermediate protection part and the lower protection part are provided.

そして、この構成では、上部保護部及び下部保護部よりも展開時の体積が小さい中間保護部を設けたため、乗員のすね部に対する圧迫が容易に抑制される。   And in this structure, since the intermediate | middle protection part whose volume at the time of expansion | deployment is smaller than an upper protection part and a lower protection part was provided, the compression with respect to a passenger | crew's shin part is suppressed easily.

請求項３記載のエアバッグは、請求項２記載のエアバッグにおいて、供給されるガスは、下部保護部から中間保護部を介して上部保護部に供給されるものである。   According to a third aspect of the present invention, in the airbag according to the second aspect, the supplied gas is supplied from the lower protective part to the upper protective part via the intermediate protective part.

そして、この構成では、上部保護部に対して大きな体積が必要となる下部保護部を迅速に展開させることが可能になる。また、上部保護部をガスを供給する部材側に連結する必要がなく、乗員の動きに追随して上部保護部を移動可能とすることが可能になる。   And in this structure, it becomes possible to expand | deploy rapidly the lower protective part which requires a big volume with respect to an upper protective part. In addition, it is not necessary to connect the upper protection part to the gas supply member side, and the upper protection part can be moved following the movement of the occupant.

請求項４記載のエアバッグ装置は、請求項１ないし３いずれか一記載のエアバッグと、このエアバッグにガスを供給するインフレータとを具備し、取付面部は、車体のインストルメントパネルを構成するものである。   An airbag device according to a fourth aspect includes the airbag according to any one of the first to third aspects and an inflator that supplies gas to the airbag, and the mounting surface portion constitutes an instrument panel of the vehicle body. Is.

そして、この構成では、請求項１ないし３いずれか一記載のエアバッグを備えたため、車体のインストルメントパネルと着座した乗員との間の小さい空間に展開して着座した乗員を効果的に保護できるエアバッグ装置が提供される。   In this configuration, since the airbag according to any one of claims 1 to 3 is provided, the seated occupant can be effectively protected in a small space between the instrument panel of the vehicle body and the seated occupant. An airbag device is provided.

本発明によれば、エアバッグが展開した状態で、上部保護部により着席した乗員の膝部を拘束し、乗員の移動を抑制できるとともに、下部保護部により、乗員が上部保護部の下側に潜り込むように移動することを防止できる。上部保護部の過度に早い収縮が抑制され、乗員を安定して支持できる。このため、エアバッグの体積を必要以上に大きくする必要がなく、製造コストを低減できる。   According to the present invention, in the state where the airbag is deployed, the occupant's knees seated by the upper protection part can be restrained and the movement of the occupant can be suppressed, and the occupant can be placed below the upper protection part by the lower protection part. It is possible to prevent moving so as to sink. An excessively fast contraction of the upper protection part is suppressed, and the passenger can be supported stably. For this reason, it is not necessary to increase the volume of the airbag more than necessary, and the manufacturing cost can be reduced.

以下、本発明のエアバッグ及びエアバッグ装置の一実施の形態を図面を参照して説明する。   Hereinafter, an embodiment of an airbag and an airbag device of the present invention will be described with reference to the drawings.

図１ないし図３において、１はエアバッグで、このエアバッグ１を備えたエアバッグ装置２は、図１に示すように、被取付部材としての車両である自動車の車体の車室４に面した取付面部としてのパネル５に配置されている。そして、このエアバッグ装置２は、ニーエアバッグ装置とも呼ばれるもので、前面衝突などの衝撃を受けた際に、図１にダミーで示す乗員Ａの足元すなわち下肢部Ａ1に対向して展開し、乗員Ａの下肢部Ａ1を拘束して乗員Ａを保護するようになっている。なお、以下、前後方向などの方向は、車体の直進方向を基準とし、すなわち、反乗員方向としての前方Ｆ、この前方Ｆの反対側であり乗員方向である後方Ｂ、上方Ｕ、下方Ｄ、及び、幅方向Ｗとして説明する。   1 to 3, reference numeral 1 denotes an airbag. As shown in FIG. 1, an airbag device 2 provided with the airbag 1 faces a compartment 4 of a vehicle body of a vehicle as a mounted member. It is arrange | positioned at the panel 5 as a mounting surface part. And this airbag apparatus 2 is also called a knee airbag apparatus, and when subjected to an impact such as a frontal collision, the airbag apparatus 2 is deployed so as to face the feet of the occupant A shown by a dummy in FIG. The lower limb A1 of the occupant A is restrained to protect the occupant A. Hereinafter, the direction such as the front-rear direction is based on the straight direction of the vehicle body, that is, the front F as the anti-occupant direction, the rear B, the upper U, the lower D, opposite to the front F and the occupant direction. And it demonstrates as the width direction W.

そして、この車体は、車室４内に乗員Ａが着座可能な両側一対の座席６を備えているとともに、これら座席６の前方Ｆには、フロントガラスとインストルメントパネル12とが配置されている。さらに、このインストルメントパネル12の下方Ｄの下部あるいは中段部には、インストルメントパネル12を構成するダッシュパネルなどとも呼ばれるパネル５が配置され、このパネル５に、各座席６に対向して、エアバッグ装置２が取り付けられている。また、図示しない一方の座席は、運転席であり、インストルメントパネル12とパネル５との間には、ステアリングホイールが配置されている。また他方の座席６は、助手席であり、インストルメントパネル12とパネル５との間には、グローブボックスなどが配置されている。なお、上記のエアバッグ装置２の他に、この車室４には、ステアリングホイール、インストルメントパネル12、座席６の側部、ルーフサイドレールなどに、図示しないエアバッグ装置が備えられている。   The vehicle body includes a pair of seats 6 on both sides in which a passenger A can be seated in a passenger compartment 4, and a windshield and an instrument panel 12 are disposed in front F of the seats 6. . Further, a panel 5 called a dash panel or the like constituting the instrument panel 12 is disposed at a lower part or a middle part of the lower part D of the instrument panel 12. A bag device 2 is attached. One of the seats (not shown) is a driver's seat, and a steering wheel is disposed between the instrument panel 12 and the panel 5. The other seat 6 is a passenger seat, and a glove box or the like is disposed between the instrument panel 12 and the panel 5. In addition to the airbag device 2 described above, the vehicle compartment 4 is provided with an airbag device (not shown) on the steering wheel, the instrument panel 12, the side of the seat 6, the roof side rail, and the like.

そして、エアバッグ装置２は、取付手段であるケース体21と、このケース体21に取り付けられるインフレータ22、リテーナ24、エアバッグ１、及びカバー体26などを備えている。そして、ケース体21は、ハウジングなどとも呼ばれるもので、後面を開口部とした略箱状をなす本体部を備えている。また、この本体部には、車体に固定されるブラケットが取り付けられているとともに、上下の面には、複数の取付片部が設けられている。また、インフレータは、略円柱状をなし、一端部近傍にガス噴射部が設けられているとともに、他端部に接続部が設けられている。そして、このインフレータ22は、接続部に接続されるハーネスを介して制御装置に接続され、このハーネスを介して制御装置から供給される起動信号に基づき、ガス噴射部からガスを噴射する。また、リテーナ24は、略円筒状をなすリテーナ本体と、このリテーナ本体に溶接などして固定された一対の取付ボルトとを備えており、これら取付ボルトに螺合するナットにより、リテーナ24がケース体21に取り付けられている。また、リテーナ本体には、ガスが通過するガス通孔が形成されている。さらに、カバー体26は、リッドなどとも呼ばれるもので、例えば合成樹脂にて一体に形成され、表板部と、この表板部の裏面側すなわち前面側から前側に突設された取付板部とを備えている。そして、表板部には、他の部分より脆弱な破断部であるテアラインが例えば略Ｈ字状などに形成されている。また、取付板部は角筒状をなすとともに、上下の面には、取付片部に対応して、角孔状の取付受部が複数形成されている。そこで、取付板部をケース体21の本体部の外側に嵌合し、取付片部を取付受部に係合した状態で、表板部が開口部を覆うようにして、ケース体21にカバー体26が取り付けられている。   The airbag device 2 includes a case body 21 serving as attachment means, an inflator 22 attached to the case body 21, a retainer 24, the airbag 1, a cover body 26, and the like. The case body 21 is also referred to as a housing or the like, and includes a main body having a substantially box shape with the rear surface as an opening. In addition, a bracket fixed to the vehicle body is attached to the main body, and a plurality of attachment pieces are provided on the upper and lower surfaces. Further, the inflator has a substantially cylindrical shape, a gas injection part is provided in the vicinity of one end part, and a connection part is provided in the other end part. The inflator 22 is connected to the control device via a harness connected to the connection portion, and injects gas from the gas injection portion based on an activation signal supplied from the control device via the harness. The retainer 24 includes a substantially cylindrical retainer main body and a pair of mounting bolts fixed to the retainer main body by welding or the like, and the retainer 24 is attached to the case by nuts screwed to the mounting bolts. It is attached to the body 21. The retainer body is formed with a gas through hole through which gas passes. Further, the cover body 26 is also called a lid or the like, and is integrally formed of, for example, a synthetic resin, and includes a front plate portion and a mounting plate portion protruding from the back side of the front plate portion, that is, from the front side to the front side. It has. And the tear line which is a fracture | rupture part weaker than another part is formed in the front-plate part in the substantially H shape etc., for example. The mounting plate portion has a rectangular tube shape, and a plurality of square hole-shaped mounting receiving portions are formed on the upper and lower surfaces corresponding to the mounting piece portions. Therefore, the mounting plate portion is fitted to the outside of the main body portion of the case body 21, and the case plate 21 is covered so that the front plate portion covers the opening portion with the mounting piece portion engaged with the mounting receiving portion. A body 26 is attached.

また、エアバッグ１は、１枚の基布を縫い合わせあるいは複数枚の基布を縫い合わせて袋状に形成され、所定の形状に折り畳まれてケース体21に収納されている。そして、本実施の形態では、エアバッグ１は、袋状の外殻を構成するエアバッグ本体部30と、このエアバッグ本体部30の内側に配置される隔壁部としての第１の隔壁31及び第２の隔壁32と、エアバッグ本体部30の内側に配置される補強布34とを互いに縫い合わせて構成されている。   The airbag 1 is formed into a bag shape by stitching together one base fabric or a plurality of base fabrics, and is folded into a predetermined shape and stored in a case body 21. In the present embodiment, the airbag 1 includes an airbag main body 30 constituting a bag-shaped outer shell, a first partition 31 as a partition wall disposed inside the airbag main body 30, and The second partition wall 32 and the reinforcing cloth 34 disposed inside the airbag main body 30 are sewn together.

そして、エアバッグ本体部30は、図２及び図３に示すように、所定の形状に切断した１枚の基布を幅方向Ｗに沿った折り線36で折り返して前部基布部30a及び後部基布部30bを構成し、これら基布部30a，30bの両側部を側部縫合線37，37で縫い合わせ、上端部となる折り線36と反対側の下端部に開口部38を設け、図３に示すように開口部38近傍を折り返した状態で、内部を気室39とした袋状に構成されている。また、このエアバッグ本体部30は、図２に示すように平面上に広げた状態で、折り線36の近傍に最も幅寸法の大きい部分があり、開口部38に向かって幅寸法が小さくなるように構成されている。   As shown in FIGS. 2 and 3, the airbag main body 30 folds one base fabric cut into a predetermined shape at a fold line 36 along the width direction W so that the front base fabric portion 30 a and A rear base fabric portion 30b is configured, and both side portions of the base fabric portions 30a and 30b are sewn together by side suture lines 37 and 37, and an opening 38 is provided at the lower end portion opposite to the folding line 36 serving as the upper end portion. As shown in FIG. 3, it is configured in a bag shape with the inside as an air chamber 39 with the vicinity of the opening 38 folded back. Further, the airbag main body 30 has a portion having the largest width dimension in the vicinity of the folding line 36 in a state where the airbag body section 30 is spread on a plane as shown in FIG. 2, and the width dimension decreases toward the opening 38. It is configured as follows.

また、第１の隔壁31及び第２の隔壁32は、それぞれ帯状の基布で構成され、第１の隔壁31の折り線36側に第２の隔壁32が配置され、エアバッグ本体部30の内部の気室39を、下部保護部（下側チャンバー）41、中間保護部（中間チャンバー）42、及び上部保護部（上側チャンバー）43の３個の気室に区画するように配置されている。すなわち、第１の隔壁31及び第２の隔壁32は、エアバッグ本体部30少なくとも気室39の幅方向Ｗの全長を区画する長さ寸法を有し、長手方向に沿った両側縁をそれぞれ縫合線44でエアバッグ本体部30の前後の基布部30a，30bに略気密に縫い合わせて接合されているとともに、長手方向の両端部は側部縫合線37で略気密に縫い合わせて接合されている。また、各隔壁31，32には、それぞれ所定の間隔で、ガスが流通可能な通気部としての流通部45が形成されている。そして、各流通部45は、例えば所定の直径寸法の円孔状で、第１の隔壁31の各流通部45と、第２の隔壁32の各流通部45とは、直線上に連通せず、上下方向すなわち保護部41，42，43の並び方向すなわちガスの流通方向に対して、位置がずれるように互い違いに配置されている。   The first partition wall 31 and the second partition wall 32 are each composed of a belt-like base fabric, and the second partition wall 32 is disposed on the folding line 36 side of the first partition wall 31, so The internal air chamber 39 is arranged to be divided into three air chambers: a lower protection part (lower chamber) 41, an intermediate protection part (intermediate chamber) 42, and an upper protection part (upper chamber) 43. . That is, the first partition wall 31 and the second partition wall 32 have a length dimension that defines at least the entire length of the airbag body 30 in the width direction W of the air chamber 39, and both side edges along the longitudinal direction are sewn together. The wire 44 is stitched and joined to the base fabric portions 30a and 30b before and after the airbag main body 30 in a substantially airtight manner, and both end portions in the longitudinal direction are joined in a substantially airtight manner with side suture lines 37. . Each partition wall 31 and 32 is formed with a circulation part 45 as a ventilation part through which gas can circulate at a predetermined interval. Each circulation part 45 has, for example, a circular shape with a predetermined diameter, and each circulation part 45 of the first partition wall 31 and each circulation part 45 of the second partition wall 32 do not communicate in a straight line. Further, they are alternately arranged so that their positions are deviated with respect to the vertical direction, that is, the arrangement direction of the protection parts 41, 42, 43, that is, the gas flow direction.

すなわち、これら隔壁31，32により区画形成された３個の保護部41，42，43については、下部保護部41の上側に中間保護部42が配置され、この中間保護部42の上側に上部保護部43が配置されるとともに、互いに隣接する保護部41，42，43、すなわち、下部保護部41と中間保護部42、及び、中間保護部42と上部保護部43とは、各隔壁31，32で左右方向すなわち幅方向Ｗの全幅にわたって区画され、流通部45のみで連通するように構成されている。また、展開した状態で、中間保護部42の体積は、他の下部保護部41及び上部保護部43の体積よりも小さくなるように設定されている。また、下部保護部41は、インフレータ22が配置されるガス導入部が設定されている。   That is, for the three protection portions 41, 42, 43 partitioned by the partition walls 31, 32, the intermediate protection portion 42 is disposed above the lower protection portion 41, and the upper protection is provided above the intermediate protection portion 42. The part 43 is disposed, and the protection parts 41, 42, 43 adjacent to each other, that is, the lower protection part 41 and the intermediate protection part 42, and the intermediate protection part 42 and the upper protection part 43 are respectively included in the partition walls 31, 32. In the left-right direction, that is, the entire width in the width direction W, the communication section 45 is configured to communicate with each other. Further, in the expanded state, the volume of the intermediate protection part 42 is set to be smaller than the volumes of the other lower protection part 41 and the upper protection part 43. Further, the lower protective part 41 is set with a gas introduction part in which the inflator 22 is arranged.

さらに、補強布34は、防炎布などとも呼ばれるもので、ガス導入部などについて、エアバッグ本体部30を構成する基布に重ねて縫合されている。また、このガス導入部には、エアバッグ本体部30を構成する基布と防炎布とを貫通して、円孔状の取付孔47a，47bが複数形成されている。そして、上側すなわち開口部38から離間した側の取付孔47aは、前側の基布部30aのみに形成され、下側すなわち開口部38側の取付孔47bは、前後の基布部30a，30bを貫通して形成されている。   Further, the reinforcing cloth 34 is also called a flameproof cloth or the like, and the gas introducing portion and the like are stitched on the base fabric constituting the airbag main body 30 so as to overlap. In addition, a plurality of circular mounting holes 47a and 47b are formed in the gas introduction portion so as to penetrate the base fabric and the flameproof fabric constituting the airbag main body portion 30. The mounting hole 47a on the upper side, that is, the side away from the opening 38 is formed only in the front base fabric portion 30a, and the mounting hole 47b on the lower side, that is, the opening 38 side, has the front and rear base fabric portions 30a, 30b. It is formed through.

次に、このエアバッグ装置２の組み立て工程を説明する。   Next, the assembly process of this airbag apparatus 2 is demonstrated.

まず、エアバッグ１、インフレータ22、及びリテーナ24などを組み合わせて、組立体を構成する。この工程は、まず、インフレータ22を取り付けたリテーナ24を、開口部38からエアバッグ１の内側に挿入し、リテーナ24の取付ボルトを取付孔47aから引き出す。そして、エアバッグ１の下端部を折り返しながら、リテーナ24の取付ボルトを取付孔47bから引き出す。次いで、図３に実線で示すようにエアバッグ１を平面状に広げるように形を整えた状態から、ロール状あるいは蛇腹状などに折り、所定の形状に折り畳む。そして、必要に応じてエアバッグ１に図示しないラッピングを被せ、エアバッグ１を所定の形状に折り畳んだ状態で保持し組立体を構成する。   First, an assembly is configured by combining the airbag 1, the inflator 22, the retainer 24, and the like. In this step, first, the retainer 24 to which the inflator 22 is attached is inserted into the airbag 1 from the opening 38, and the attachment bolt of the retainer 24 is pulled out from the attachment hole 47a. Then, with the lower end of the airbag 1 folded back, the mounting bolt of the retainer 24 is pulled out from the mounting hole 47b. Next, as shown by a solid line in FIG. 3, the airbag 1 is folded into a roll shape or an accordion shape from a state in which the shape is adjusted so as to be flattened, and is folded into a predetermined shape. Then, if necessary, the airbag 1 is covered with a wrapping (not shown), and the airbag 1 is held in a folded state to constitute an assembly.

次いで、この組立体を開口部を介してケース体21に挿入し、ケース体21に形成された図示しない取付孔にリテーナ24の取付ボルトを貫通させ、ケース体21の外側から取付ボルトに図示しないナットを螺合して、組立体すなわちエアバッグ１、インフレータ22、及びリテーナ24などをケース体21に固定する。次いで、表板部が開口部すなわちエアバッグ１を覆うようにして、ケース体21にカバー体26を取り付けることにより、エアバッグ装置２が構成される。   Next, this assembly is inserted into the case body 21 through the opening, and the mounting bolts of the retainer 24 are passed through the mounting holes (not shown) formed in the case body 21, and the mounting bolts are not shown from the outside of the case body 21. The nuts are screwed together to fix the assembly, that is, the airbag 1, the inflator 22, the retainer 24, and the like to the case body 21. Next, the airbag apparatus 2 is configured by attaching the cover body 26 to the case body 21 so that the front plate portion covers the opening, that is, the airbag 1.

そして、ケース体21に設けたブラケットを車体側の部品に連結し、カバー体26の表板部がパネル５と面一になるようにエアバッグ装置２を車体に取り付けるとともに、インフレータ22に接続したハーネスを制御手段に電気的に連結し、エアバッグ装置２が車体に設置される。   Then, the bracket provided on the case body 21 is connected to the parts on the vehicle body side, and the airbag device 2 is attached to the vehicle body and connected to the inflator 22 so that the front plate portion of the cover body 26 is flush with the panel 5. The airbag device 2 is installed on the vehicle body by electrically connecting the harness to the control means.

次に、このエアバッグ装置２の動作を説明する。   Next, the operation of the airbag device 2 will be described.

制御装置が自動車の正面衝突などの衝撃を検出すると、この制御装置はハーネスを通じて起動信号である電力を供給し、インフレータ22を作動させる。そして、インフレータ22からエアバッグ１内にガスが供給されると、エアバッグ１は、ケース体21の内側で膨張し、まず、ラッピングを破断し、ついで、カバー体26をテアラインで破断して、エアバッグ１を突出させる。そして、エアバッグ１は、まず、ガスが最初に導入される下部保護部41が膨張展開する。この下部保護部41は、パネル５下方の比較的広い空間に展開し、乗員Ａの足首側を拘束し、乗員Ａの下方への滑り込みを防止する。次いで、第１の隔壁31の流通部45を介してガスを供給し、中間保護部42を展開させる。次いで、この中間保護部42から、第２の隔壁32の流通部45を介してガスを供給し、上部保護部43を展開させる。そして、この上部保護部43は、慣性で前方Ｆに移動してくる乗員Ａの膝部Ａ2に対向して膨張展開し、乗員Ａの膝部Ａ2を拘束して保護するとともに、結果的に乗員Ａの腰部の移動を抑制して、乗員Ａの車体に対する相対的な移動を効果的に抑制し、パネル５や車室４に進入してくる床面などに直接当接することなどを抑制して保護する。そして、エアバッグ１は、最終的に、図１、あるいは図３に２点鎖線で示す形状に膨張展開する。   When the control device detects an impact such as a frontal collision of the automobile, the control device supplies electric power as an activation signal through the harness and operates the inflator 22. Then, when gas is supplied from the inflator 22 into the airbag 1, the airbag 1 is inflated inside the case body 21, first ruptures the wrapping, and then breaks the cover body 26 at the tear line, The airbag 1 is protruded. In the airbag 1, first, the lower protective part 41 into which gas is first introduced is inflated and deployed. The lower protective part 41 is deployed in a relatively wide space below the panel 5 and restrains the ankle side of the occupant A to prevent the occupant A from slipping downward. Next, gas is supplied through the flow part 45 of the first partition wall 31 to expand the intermediate protection part 42. Next, gas is supplied from the intermediate protection part 42 via the circulation part 45 of the second partition wall 32 to expand the upper protection part 43. The upper protection portion 43 inflates and deploys against the knee portion A2 of the occupant A moving forward F due to inertia, restrains and protects the knee portion A2 of the occupant A, and as a result, the occupant By suppressing the movement of the waist of A, the relative movement of the occupant A with respect to the vehicle body is effectively suppressed, and direct contact with the floor surface entering the panel 5 or the passenger compartment 4 is suppressed. Protect. Then, the airbag 1 is finally inflated and deployed in a shape indicated by a two-dot chain line in FIG. 1 or FIG.

このように、本実施の形態によれば、乗員Ａの膝部Ａ2を保護可能なエアバッグ装置２について、エアバッグ１の単に幅方向Ｗの一部のみを縫い合わせるのではなく、エアバッグ１の内側を幅方向Ｗの全幅にわたる各隔壁31，32により下部保護部41、中間保護部42、及び上部保護部43の３個の保護部41，42，43に区画したため、各隔壁31，32に設けた流通部45のみを介して、インフレータ22から供給したガスが下部保護部41、中間保護部42、上部保護部43の順に充填され、各保護部41，42，43を順次確実に展開させることができる。   As described above, according to the present embodiment, the airbag device 2 that can protect the knee portion A2 of the occupant A is not simply stitched in a part of the airbag 1 in the width direction W. Since the inner side is partitioned into three protective parts 41, 42, 43 of the lower protective part 41, the intermediate protective part 42, and the upper protective part 43 by the respective bulkheads 31, 32 extending over the entire width in the width direction W. The gas supplied from the inflator 22 is filled in the order of the lower protective part 41, the intermediate protective part 42, and the upper protective part 43 through only the circulation part 45 provided, and the protective parts 41, 42, and 43 are sequentially and reliably deployed. be able to.

そして、下部保護部41は、このエアバッグ装置２が展開して保護する領域のうち、周辺の内装部材とのレイアウトの関係で広い空間に展開するものであるが、エアバッグ１の下側に位置して水平状に設けた下部保護部41にインフレータ22からガスを直接的に供給し、この下部保護部41を第１に展開させることにより、広い空間に迅速確実にエアバッグ１を展開させ、乗員Ａの下方への滑り込み、いわゆるサブマリン現象を確実に防止することができる。   And the lower protection part 41 is developed in a wide space in relation to the layout with the surrounding interior members in the area that the airbag device 2 deploys and protects. The gas is directly supplied from the inflator 22 to the lower protective part 41 that is positioned and provided horizontally, and the lower protective part 41 is deployed first, so that the airbag 1 can be deployed quickly and reliably in a wide space. Thus, it is possible to reliably prevent the occupant A from slipping downward, the so-called submarine phenomenon.

また、上部保護部43は、このエアバッグ装置２が展開して保護する領域のうち、周辺の空間が小さい空間に展開するものであるとともに、慣性により乗員Ａの体重の多くが膝部からエアバッグ１に加わる場合がある。この点、上部保護部43は、第２の隔壁32により他の保護部41，42と区画され、流通部45のみを介して中間保護部42に連通するため、上部保護部43は力が加わった際にも急速に縮小することが抑制され、乗員Ａの特に腰部の前方への移動を規制し、いわゆる底付することなく乗員Ａを安定して支持して保護できる。そこで、エアバッグ１の体積を必要以上に大きくする必要がないとともに、インフレータ22の出力も大きくする必要がなく、製造コストを低減できるとともに、エアバッグ装置２を小型化することができる。   In addition, the upper protection portion 43 is a portion where the surrounding space is deployed in a small space in the region that the airbag device 2 is deployed and protected, and much of the weight of the occupant A is aired from the knee due to inertia. May join the bag 1. In this respect, the upper protection part 43 is partitioned from the other protection parts 41 and 42 by the second partition wall 32 and communicates with the intermediate protection part 42 only through the circulation part 45, so that the upper protection part 43 is applied with force. In this case, the rapid contraction of the occupant A is suppressed, and the movement of the occupant A, in particular, to the front of the waist is restricted. Therefore, it is not necessary to increase the volume of the airbag 1 more than necessary, and it is not necessary to increase the output of the inflator 22, so that the manufacturing cost can be reduced and the airbag device 2 can be downsized.

さらに、下部保護部41と上部保護部43との間に中間保護部42を設けたため、下部保護部41と上部保護部43とについて好ましい展開挙動を容易に実現できる。すなわち、下部保護部41と上部保護部43とはそれぞれ保護対象が異なり、下部保護部41は広い空間の全体という定位置で展開することが求められ、リテーナ24などにより強固に固定される一方、上部保護部43は、限られた空間に膨張展開して乗員Ａの体重を支えるため、若干移動可能とする構成が望ましい。そこで、上部保護部43は、固定された下部保護部41に対して、中間保護部42を介して接続したため、乗員Ａから加わる力に応じて上部保護部43がフレキシブルに可撓して移動し、乗員Ａを効果的に保護できる。   Furthermore, since the intermediate protective part 42 is provided between the lower protective part 41 and the upper protective part 43, a preferable unfolding behavior can be easily realized for the lower protective part 41 and the upper protective part 43. That is, the lower protection part 41 and the upper protection part 43 have different protection targets, and the lower protection part 41 is required to be deployed at a fixed position of the entire wide space, while being firmly fixed by the retainer 24 or the like, Since the upper protection part 43 is inflated and deployed in a limited space to support the weight of the occupant A, it is desirable that the upper protection part 43 be slightly movable. Therefore, since the upper protection part 43 is connected to the fixed lower protection part 41 via the intermediate protection part 42, the upper protection part 43 moves flexibly and flexibly according to the force applied from the occupant A. The passenger A can be effectively protected.

また、中間保護部42は、膨張時の体積を下部保護部41及び上部保護部43よりも小さく設定したため、上部保護部43が撓んで移動しやすくなるとともに、乗員Ａのすね部Ａ3に対する圧力を容易に軽減できる。   In addition, since the intermediate protection part 42 is set to have a volume at the time of expansion smaller than that of the lower protection part 41 and the upper protection part 43, the upper protection part 43 is bent and easily moved, and the pressure on the shin part A3 of the passenger A Can be easily reduced.

また、図２に示すように、第１の隔壁31の各流通部45と、第２の隔壁32の各流通部45とは、直線上に連通せず、いわばガスの流路が互いに違いになるように構成されているため、エアバッグ１の展開時には、インフレータ22から供給されたガスが下側から上側に各保護部41，42，43を充満させつつ供給され、エアバッグを安定して展開させることができる。   In addition, as shown in FIG. 2, each flow part 45 of the first partition wall 31 and each flow part 45 of the second partition wall 32 do not communicate with each other in a straight line, so that the gas flow paths are different from each other. Therefore, when the airbag 1 is deployed, the gas supplied from the inflator 22 is supplied from the lower side to the upper side while filling the protective portions 41, 42, and 43, so that the airbag is stabilized. Can be deployed.

また、これら流通部45の形状、大きさなどを調整することにより、エアバッグ１の展開特性を容易に調整することができる。   Further, the deployment characteristics of the airbag 1 can be easily adjusted by adjusting the shape, size, and the like of these circulation portions 45.

なお、上記の実施の形態では、２個の隔壁31，32により３個の気室である保護部41，42，43を構成したが、この構成に限られず、１個あるいは３個以上の隔壁を設け、２個の保護部あるいは４個以上の複数の保護部を設けることもできる。   In the above embodiment, the protection portions 41, 42, 43, which are three air chambers, are configured by the two partition walls 31, 32. However, the present invention is not limited to this configuration, and one or more than three partition walls are provided. It is also possible to provide two protective parts or a plurality of four or more protective parts.

本発明は、車両に備えられるエアバッグ及びエアバッグ装置の他、車両以外の移動体に備えることもできる。   The present invention can be provided not only in an airbag and an airbag device provided in a vehicle but also in a moving body other than the vehicle.

本発明のエアバッグ装置の一実施の形態を示すエアバッグの展開時の説明図である。It is explanatory drawing at the time of expansion | deployment of the airbag which shows one Embodiment of the airbag apparatus of this invention. 同上エアバッグを平面上に広げた状態の説明図である。It is explanatory drawing of the state which spread the airbag same as the above on the plane. 同上エアバッグ装置の図２のＩ−Ｉ断面相当位置の説明図である。It is explanatory drawing of the II cross section equivalent position of FIG. 2 of an airbag apparatus same as the above.

符号の説明Explanation of symbols

１ エアバッグ
２ エアバッグ装置
５ 取付面部としてのパネル
12 インストルメントパネル
22 インフレータ
31 隔壁部としての第１の隔壁
32 隔壁部としての第２の隔壁
41 下部保護部
42 中間保護部
43 上部保護部
45 通気部としての流通部
Ａ 乗員
Ａ1 下肢部
Ａ2 膝部 DESCRIPTION OF SYMBOLS 1 Air bag 2 Air bag apparatus 5 Panel as attachment surface part
12 Instrument panel
22 Inflator
31 1st partition as partition
32 Second partition as partition
41 Lower protection
42 Intermediate protection
43 Upper protection
45 Distribution Department as Ventilation A A Crew A1 Lower limb A2 Knee

Claims (4)

ガスを供給され取付面部と着席した乗員の下肢部との間に展開するエアバッグであって、
乗員の膝部に対向して展開する上部保護部と、
この上部保護部の下側に位置して展開する下部保護部と、
これら保護部同士の間を前記エアバッグの全幅にわたり区画するとともに前記ガスが挿通可能な通気部を設けた隔壁部とを備える
ことを特徴とするエアバッグ。 An airbag that is supplied between a mounting surface portion and a lower limb portion of a seated occupant that is supplied with gas,
An upper protective part that deploys facing the knee of the occupant;
A lower protective part that is located under the upper protective part and expands;
An air bag comprising: a partition portion provided with a ventilation portion through which the gas can be inserted while partitioning between the protective portions over the entire width of the airbag. エアバッグは、上部保護部と下部保護部との間に位置しこれら上部保護部及び下部保護部よりも展開時の体積が小さい中間保護部と、
前記中間保護部と前記上部保護部との間及び前記中間保護部と前記下部保護部との間を区画する隔壁部とを備える
ことを特徴とする請求項１記載のエアバッグ。 The airbag is located between the upper protective part and the lower protective part, and the intermediate protective part having a smaller volume when deployed than the upper protective part and the lower protective part,
The airbag according to claim 1, further comprising: a partition wall that partitions between the intermediate protection part and the upper protection part and between the intermediate protection part and the lower protection part. 供給されるガスは、下部保護部から中間保護部を介して上部保護部に供給される
ことを特徴とする請求項２記載のエアバッグ。 The airbag according to claim 2, wherein the supplied gas is supplied from the lower protection part to the upper protection part via the intermediate protection part. 請求項１ないし３いずれか一記載のエアバッグと、
このエアバッグにガスを供給するインフレータとを具備し、
取付面部は、車体のインストルメントパネルを構成する
ことを特徴とするエアバッグ装置。 An airbag according to any one of claims 1 to 3;
An inflator for supplying gas to the airbag,
An air bag apparatus, wherein the mounting surface portion constitutes an instrument panel of a vehicle body.
JP2005121915A 2005-04-20 2005-04-20 Airbag Active JP5053520B2 (en)

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JP2009107579A (en) * 2007-10-31 2009-05-21 Nippon Plast Co Ltd Airbag and airbag device
KR100946938B1 (en) * 2008-02-20 2010-03-09 델파이코리아 유한회사 Air Bag For Vehicle
WO2013041406A1 (en) * 2011-09-22 2013-03-28 Autoliv Development Ab Knee airbag having a shaping inner inflation tube
JP2019084945A (en) * 2017-11-07 2019-06-06 Ｊｏｙｓｏｎ Ｓａｆｅｔｙ Ｓｙｓｔｅｍｓ Ｊａｐａｎ株式会社 Knee airbag and knee airbag device

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JP2009107579A (en) * 2007-10-31 2009-05-21 Nippon Plast Co Ltd Airbag and airbag device
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WO2013041406A1 (en) * 2011-09-22 2013-03-28 Autoliv Development Ab Knee airbag having a shaping inner inflation tube
JP2019084945A (en) * 2017-11-07 2019-06-06 Ｊｏｙｓｏｎ Ｓａｆｅｔｙ Ｓｙｓｔｅｍｓ Ｊａｐａｎ株式会社 Knee airbag and knee airbag device

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