JP2011235693A - Airbag device for motorcycle - Google Patents

Airbag device for motorcycle Download PDF

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JP2011235693A
JP2011235693A JP2010107184A JP2010107184A JP2011235693A JP 2011235693 A JP2011235693 A JP 2011235693A JP 2010107184 A JP2010107184 A JP 2010107184A JP 2010107184 A JP2010107184 A JP 2010107184A JP 2011235693 A JP2011235693 A JP 2011235693A
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airbag
width dimension
right direction
support member
support material
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JP5518564B2 (en
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Kenji Hayakawa
健次 早川
Shigeyuki Suzuki
滋幸 鈴木
Motoaki Deguchi
基明 出口
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Toyoda Gosei Co Ltd
Yamaha Motor Co Ltd
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Toyoda Gosei Co Ltd
Yamaha Motor Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an airbag device for motorcycles capable of easily suppressing lateral shift of the airbag when a passenger is received and stopped.SOLUTION: The airbag device M for motorcycles includes: an airbag 21 which expands upward from an accommodation part 14 provided in a seat of the motorcycle when inflation gas flows in, and which completes expansion so that the passenger moving forward may be received and stopped; and a support material 70 for supporting a front face 21c side of the airbag, when expansion is completed. The airbag 21 connects a connection belt 42 which is connected to an upper edge 70a of the support material, as a driving source for pulling up the support material 70, at the center of an upper edge 21t side of a front face 21c, when expansion is completed. The connection belt 42 connects a tip 45 to almost all areas of a width direction of the upper edge 70a of the support material, and a width dimension W2 of a lateral direction of a main part edge 43 to be connected to the airbag, is within 70 to 90% of a width dimension W1 of a lateral direction of the upper edge of the support material.

Description

本発明は、自動二輪車に搭載されて、衝突時の乗員を保護するためのエアバッグを備えて構成される自動二輪車用エアバッグ装置に関する。   The present invention relates to an airbag apparatus for a motorcycle that is mounted on a motorcycle and includes an airbag for protecting an occupant during a collision.

従来、自動二輪車用エアバッグ装置としては、膨張用ガスの流入時、シートに着座した乗員の左右の脚部の間付近に設けられた収納部位から、上方側へ展開膨張して、前方側へ移動する乗員を受け止め可能に膨張を完了させるエアバッグと、膨張完了時のエアバッグの前面側を支持可能に、エアバッグの前方側に配置される支持材と、を備えて構成されるものがあった(例えば、特許文献1,2参照)。そして、このエアバッグは、支持材を引き上げる駆動源として構成されて、膨張時に支持材を収納部位から引き上げ可能に、支持材の上端に連結される可撓性を有した連結ベルトを、膨張完了時の前面の上端側における左右方向の中央に、縫合して結合させていた。   Conventionally, as an airbag device for a motorcycle, when an inflating gas flows in, the airbag is deployed and inflated upward from a storage portion provided near the left and right legs of an occupant seated on a seat, and then forwarded. What is configured to include an airbag that can receive the moving occupant and complete the inflation, and a support member that is disposed on the front side of the airbag so as to support the front side of the airbag when the inflation is completed. (For example, see Patent Documents 1 and 2). The airbag is configured as a drive source for pulling up the support material, and the flexible connecting belt connected to the upper end of the support material is fully inflated so that the support material can be lifted from the storage part during inflation. At the upper end of the front of the time, it was sewn and joined to the center in the left-right direction.

特開2007−1409号公報JP 2007-1409 A 特開2009−166571号公報JP 2009-166571 A

しかし、従来の自動二輪車用エアバッグ装置では、エアバッグ自体が、支持材を上昇させる駆動源を構成しており、エアバッグには、引き上げた支持材より上方に、連結ベルトの元部端を結合させたエアバッグの上端側を含めて、膨張する部位が、配設される構成となっていた。そのため、自動二輪車が他の車両等に斜め衝突(所謂、斜突)して、エアバッグ装置が作動され、膨張完了時のエアバッグの上端側に対して、乗員が斜め方向から当たれば、エアバッグの上端側が回転するように左右の一方側にずれる事態を招き易い。なお、自動二輪車の衝突では、衝突により自動二輪車が斜め方向に向けば、乗員は衝突前の自動二輪車の進行方向に移動することから、自動二輪車に搭載されて膨張を完了させたエアバッグに対して、乗員は斜め方向から当たることとなって、上記のエアバッグのずれが発生し易い。   However, in the conventional airbag apparatus for a motorcycle, the airbag itself constitutes a drive source for raising the support material, and the base end of the connecting belt is provided above the raised support material on the airbag. The part which expand | swells including the upper end side of the combined airbag was comprised. Therefore, if the motorcycle obliquely collides with another vehicle or the like (so-called oblique projection) and the airbag device is activated and the occupant hits the upper end side of the airbag when the inflation is completed, It is easy to invite a situation where the upper end side of the bag is shifted to one of the left and right sides so as to rotate. In the case of a motorcycle collision, if the motorcycle turns in an oblique direction due to the collision, the occupant moves in the traveling direction of the motorcycle before the collision. Thus, the occupant hits from an oblique direction, and the above-described airbag is likely to be displaced.

そして、乗員を受け止めた際の上記のエアバッグの左右へのずれ量が大きくなれば、膨張を完了させたエアバッグは、乗員に接触してから乗員を受け止めるまでに、時間がかかって、迅速に乗員を受け止め難くなってしまう。   And if the amount of displacement of the airbag to the left and right when the occupant is received increases, the airbag that has been inflated takes time to contact the occupant and receive the occupant quickly. It becomes difficult to receive the crew.

この場合、乗員受止時に、エアバッグが左右にずれないように、エアバッグの前面側を支持する支持材の左右方向の幅寸法を、大きくすることが考えられるが、支持材は、シートに着座した乗員の左右の脚部の間から引き上げられるものであって、幅寸法を広くする点に、制限があり、そして既に、支持材が許容される最大の幅寸法として設定されていれば、支持材は、その幅寸法をさらに大きくすることができない。   In this case, it is conceivable to increase the width in the left-right direction of the support material that supports the front side of the airbag so that the airbag does not shift from side to side when the occupant is received. If it is lifted from between the left and right legs of the seated occupant, there is a limitation in widening the width dimension, and if the support material is already set as the maximum allowable width dimension, The width of the support material cannot be further increased.

本発明は、上述の課題を解決するものであり、簡便に、乗員受止時のエアバッグの左右へのずれを抑制できる自動二輪車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-described problems, and an object of the present invention is to provide a motorcycle airbag device that can easily suppress the lateral displacement of the airbag when a passenger is received.

本発明に係る自動二輪用エアバッグ装置は、膨張用ガスの流入時、シートに着座した乗員の左右の脚部の間付近に設けられた収納部位から上方側へ展開膨張して、前方側へ移動する乗員を受け止め可能に膨張を完了させるエアバッグと、
膨張完了時のエアバッグの前面側を支持可能に、エアバッグの前方側に配置される支持材と、
を備えて構成されるとともに、
エアバッグが、支持材を引き上げる駆動源として、支持材を収納部位から引き上げ可能に、支持材の上端に連結される可撓性を有した帯状の連結ベルトを、膨張完了時の前面の上端側における左右方向の中央に結合させている構成の自動二輪車用エアバッグ装置であって、
連結ベルトが、先端を支持材の上端の幅方向の略全域に連結させるとともに、エアバッグと結合される元部端の左右方向の幅寸法を、支持材の上端の左右方向の幅寸法の7〜9割の範囲内として、構成されていることを特徴とする。
The airbag apparatus for a motorcycle according to the present invention expands and inflates upward from a storage portion provided between the left and right legs of an occupant seated on a seat when inflating gas flows in, and moves forward. An airbag that completes inflation so as to receive a moving occupant; and
A support member disposed on the front side of the airbag so as to be able to support the front side of the airbag when the inflation is completed;
And configured with
As a drive source for the airbag to pull up the support material, a flexible belt-like connecting belt connected to the upper end of the support material is connected to the upper end side of the front surface when the inflation is completed. An airbag device for a motorcycle configured to be coupled to the center in the left-right direction in
The connecting belt connects the front end to substantially the entire width direction of the upper end of the support member, and the width dimension in the left-right direction of the base end coupled to the airbag is set to 7 in the width direction in the left-right direction of the upper end of the support member. It is characterized by being configured in a range of ˜90%.

本発明に係る自動二輪車用エアバッグ装置では、作動時、エアバッグが、連結ベルトを引っ張りつつ上方へ膨張することから、支持材を引き上げ完了位置(エアバッグの支持位置)まで引き上げて、膨張を完了させる。そして、自動二輪車が斜突して、乗員が斜め方向からエアバッグの上端側に当接しても、エアバッグの上端側には、支持材の上端に連結された幅広の連結ベルトの元部端が結合されている。そのため、支持材の上端に連結された連結ベルトが、エアバッグの上端側の左右方向に回転するようなずれを抑制する。特に、エアバッグの上端に連結された連結ベルトは、その元部端の左右方向の幅寸法を、支持材の上端の左右方向の幅寸法の7割以上として、広くしていることから、エアバッグの上端側の左右方向へのずれを抑制できる。   In the airbag apparatus for a motorcycle according to the present invention, during operation, the airbag expands upward while pulling the connecting belt. Therefore, the support member is pulled up to the completion position (support position of the airbag) to expand the airbag. Complete. And even if the motorcycle protrudes obliquely and the occupant comes into contact with the upper end side of the airbag from an oblique direction, the upper end side of the airbag has the base end of the wide connecting belt connected to the upper end of the support material. Are combined. For this reason, the connecting belt connected to the upper end of the support member is prevented from shifting in the left-right direction on the upper end side of the airbag. In particular, since the connecting belt connected to the upper end of the airbag has a width in the left-right direction at the base end thereof that is 70% or more of the width in the left-right direction at the upper end of the support member, A shift in the left-right direction on the upper end side of the bag can be suppressed.

勿論、連結ベルトは、その元部端の幅寸法を、支持材の上端の左右方向の幅寸法の9割を超えないように、構成しており、支持材の迅速な引き上げを阻害することも無い。ちなみに、連結ベルトの元部端が、支持材の上端の幅寸法と同等、あるいは、支持材の上端の幅寸法より大きければ、支持材の迅速な引き上げを阻害してしまう。すなわち、エアバッグの膨張時における支持材の引き上げ初期、連結ベルトの元部端付近では、連結ベルトを介在させて、エアバッグの上端が支持材の上端上に乗り上げ易く、その乗り上げた部位が、前方に大きく膨らめば、瞬間的に、下方への押圧力を作用させて、支持材の上昇を抑制してしまう。そして、連結ベルトの元部端が、支持材の上端の幅寸法と同等以上としていれば、その幅広の連結ベルトの元部端を介在させて、エアバッグの上端における支持材の上端より左右に延びた部位も、支持材の上方で前方側に膨らんで、支持材を下方へ押圧するような作用を生じさせることとなって、支持材の迅速な引き上げを阻害してしまう。そのため、連結ベルトの元部端が、支持材の上端の幅寸法の9割以下であれば、膨張時のエアバッグにおける支持材の上端への乗り上げ部位が、少なくなって、支持材への下方への押圧力を作用させ難くなり、エアバッグは、支持材を迅速に引き上げることができる。   Of course, the connecting belt is configured so that the width dimension of the base end thereof does not exceed 90% of the width dimension in the left-right direction of the upper end of the support material, which may hinder rapid lifting of the support material. No. Incidentally, if the base end of the connecting belt is equal to the width dimension of the upper end of the support material or larger than the width dimension of the upper end of the support material, rapid lifting of the support material is hindered. That is, at the initial stage of pulling up the support material when the airbag is inflated, in the vicinity of the base end of the connection belt, the upper end of the airbag is easy to ride on the upper end of the support material with the connection belt interposed, If it swells greatly forward, a downward pressing force is instantaneously applied to suppress the rise of the support material. If the base end of the connecting belt is equal to or greater than the width of the upper end of the support member, the base end of the wide connecting belt is interposed between the upper end of the support member at the left and right of the upper end of the airbag. The extended portion also swells to the front side above the support material, causing an action that presses the support material downward, and hinders rapid lifting of the support material. For this reason, if the base end of the connecting belt is 90% or less of the width of the upper end of the support material, the number of parts that ride on the upper end of the support material in the airbag during expansion is reduced, and the lower part to the support material It becomes difficult to apply a pressing force to the airbag, and the airbag can quickly lift the support material.

したがって、本発明に係る自動二輪用エアバッグ装置では、連結ベルトの元部端の幅寸法を所定範囲に設定するだけで、エアバッグによる迅速な支持材の引き上げを阻害すること無く、簡便に、乗員受止時のエアバッグの左右へのずれを抑制することができる。   Therefore, in the motorcycle airbag device according to the present invention, simply by setting the width dimension of the base end of the connecting belt to a predetermined range, without hindering the quick lifting of the support material by the airbag, The shift of the airbag to the left and right when the occupant is received can be suppressed.

そして、本発明に係る自動二輪車用エアバッグ装置では、エアバッグは、支持材の後方で折り畳まれて収納される左右方向の幅寸法を、連結ベルトの元部端の左右方向の幅寸法より大きく、かつ、支持材の上端の左右方向の幅寸法より小さく設定して、配設することが望ましい。このような構成では、支持材の上端側を収納する収納部位の幅寸法内に収納される範囲内で、かつ、エアバッグの上端側に結合される連結ベルトの元部端を折り畳まない状態で、エアバッグを折り畳むことができ、エアバッグの折り畳みを円滑に行うことができる。すなわち、エアバッグの折り畳み時の左右方向の幅寸法を、連結ベルトの元部端の幅寸法より小さくする場合には、連結ベルトの元部端も折り畳むこととなって、嵩張り、また、リバウンドするような折り崩れも発生し易くなって、エアバッグをコンパクトに折り畳むことが困難となってしまう。さらに、エアバッグ装置の支持材等の収納部位は、省スペースの観点から、剛性を有した支持材に合わせて、左右方向の幅寸法が設定されており、エアバッグが、折り畳んだ幅寸法を、支持材の上端の左右方向の幅寸法より小さくしていれば、折り畳んだエアバッグは、確実に、収納部位より幅寸法を小さくできて、容易に、収納部位に収納することができる。   In the airbag apparatus for a motorcycle according to the present invention, the airbag has a width dimension in the left-right direction that is folded and stored behind the support member, and is larger than a width dimension in the left-right direction at the base end of the connecting belt. In addition, it is desirable that the width of the upper end of the support material be set smaller than the width in the left-right direction. In such a configuration, the base end of the connecting belt coupled to the upper end side of the airbag is not folded within a range stored within the width dimension of the storage portion storing the upper end side of the support member. The airbag can be folded, and the airbag can be folded smoothly. That is, when the width dimension in the left-right direction when the airbag is folded is made smaller than the width dimension of the base end of the connecting belt, the base end of the connecting belt is also folded, which is bulky and rebounded. Such a collapse tends to occur, and it is difficult to fold the airbag in a compact manner. In addition, the storage area of the airbag device, such as a support member, has a width dimension in the left-right direction according to the rigid support member from the viewpoint of space saving, and the airbag has a folded width dimension. If the width of the upper end of the support member is smaller than the width dimension in the left-right direction, the folded airbag can be surely made smaller in width than the storage part and can be easily stored in the storage part.

本発明に係る実施形態の自動二輪車用エアバッグ装置を搭載した自動二輪車の側面図である。1 is a side view of a motorcycle equipped with a motorcycle airbag device according to an embodiment of the present invention. 実施形態のエアバッグ装置の前後方向に沿った概略部分縦断面図である。It is a schematic partial longitudinal cross-sectional view along the front-back direction of the airbag apparatus of embodiment. 実施形態のエアバッグ装置の前方から見た概略正面図である。It is the schematic front view seen from the front of the airbag apparatus of embodiment. 実施形態のエアバッグ装置の上方から見た概略平面図である。It is the schematic plan view seen from the upper part of the airbag apparatus of embodiment. 実施形態のエアバッグ装置に使用するエアバッグを、リテーナを設けた状態で単独で膨張させた状態を示す斜視図である。It is a perspective view showing the state where the airbag used for the airbag device of an embodiment was inflated independently in the state where the retainer was provided. 実施形態のエアバッグや連結ベルト等に使用する構成材料を示す平面図である。It is a top view which shows the constituent material used for the airbag of an embodiment, a connection belt, etc. FIG. 実施形態の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 of an embodiment. 実施形態のエアバッグ装置の作動当初を説明する図であり、前後方向に沿った概略拡大縦断面図である。It is a figure explaining the operation | movement initial stage of the airbag apparatus of embodiment, and is a general | schematic expanded longitudinal cross-sectional view along the front-back direction. 実施形態のエアバッグ装置の作動時を説明する図であり、図8の後の状態を示す。It is a figure explaining the action | operation time of the airbag apparatus of embodiment, and shows the state after FIG. 実施形態のエアバッグ装置の作動時を説明する図であり、図9の後の状態を示す。It is a figure explaining the action | operation time of the airbag apparatus of embodiment, and shows the state after FIG. 実施形態のエアバッグ装置の作動完了時の概略縦断面図である。It is a schematic longitudinal cross-sectional view at the time of completion of operation of an air bag device of an embodiment. 実施形態のエアバッグ装置の作動完了時の概略平面図である。It is a schematic plan view when the operation of the airbag apparatus of the embodiment is completed.

以下、本発明の一実施形態を図面に基づいて説明すると、実施形態の自動二輪車用エアバッグ装置(以下、単にエアバッグ装置とする)Mは、図1に示すように、スクータ型の自動二輪車(以下、単に二輪車という)1に搭載されるものであり、この二輪車1は、乗員Dの着座するシート12とシート12の前方のハンドル10との間に、乗員Dの足部Fを載せるステップ7が配設され、エアバッグ装置Mは、シート12の前端付近に配設されている。   DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. An airbag apparatus for a motorcycle (hereinafter simply referred to as an airbag apparatus) M of the embodiment is a scooter type motorcycle as shown in FIG. (Hereinafter simply referred to as a two-wheeled vehicle) 1. The two-wheeled vehicle 1 is a step of placing a foot F of the occupant D between a seat 12 on which the occupant D is seated and a handle 10 in front of the seat 12. 7 is disposed, and the airbag apparatus M is disposed near the front end of the seat 12.

なお、本願の明細書等での前後左右の方向は、前進時の二輪車1を基準としており、二輪車1に着座した乗員Dの前後左右の方向と一致するものである。   Note that the front-rear and left-right directions in the specification and the like of the present application are based on the two-wheeled vehicle 1 at the time of forward movement, and coincide with the front-rear, left-right directions of the occupant D seated on the two-wheeled vehicle 1.

エアバッグ装置Mは、図1〜4に示すように、エアバッグ21、エアバッグ21に膨張用ガスを供給するインフレーター62、折り畳まれたエアバッグ21を収納して保持するとともにインフレーター62を保持するケース64、膨張したエアバッグ21の前面21c側を後面70b側で支持する支持材70、及び、シート12の前端の収納部位14に収納されたエアバッグ21と支持材70との上方側を覆うカバー16、を備えて構成されている。さらに、エアバッグ装置Mは、支持材70を引き上げるための連結ベルト42と、エアバッグ21の後面21d側の下部に配置される規制ベルト55と、を備えて構成されている。   1-4, the airbag apparatus M stores and holds the airbag 21, the inflator 62 that supplies the inflation gas to the airbag 21, and the folded airbag 21, and also holds the inflator 62. The case 64, the support member 70 that supports the front surface 21c side of the inflated airbag 21 on the rear surface 70b side, and the upper side of the airbag 21 and the support member 70 that are stored in the storage portion 14 at the front end of the seat 12 are covered. A cover 16 is provided. Further, the airbag device M is configured to include a connecting belt 42 for pulling up the support member 70 and a regulation belt 55 disposed at a lower portion on the rear surface 21d side of the airbag 21.

カバー16は、オレフィン系熱可塑性エラストマー等の合成樹脂から形成され、エアバッグ21と支持材70との上方を覆う長方形板状の天井壁部17と、天井壁部17の周縁から下方に延びる略四角筒形状の周壁部19と、を備えて構成され、周壁部19の下端付近が、自動二輪車1のボディ(車体)2側のフレーム3から延びるブラケット4等と結合された取付ベース5に、取り付けられている。天井壁部17は、周囲を薄肉の破断予定部17aに囲まれた長方形板状の扉部18を備え、扉部18は、膨張するエアバッグ21に押された際に、破断予定部17aを破断させて、前縁側のインテグラルヒンジからなるヒンジ部18aを回転中心として、前方側に回転するように開くこととなる(図2参照)。   The cover 16 is formed of a synthetic resin such as an olefin-based thermoplastic elastomer, and has a rectangular plate-like ceiling wall portion 17 that covers the upper side of the airbag 21 and the support member 70, and substantially extends downward from the periphery of the ceiling wall portion 17. A peripheral wall portion 19 having a square cylindrical shape, and a mounting base 5 in which the vicinity of the lower end of the peripheral wall portion 19 is coupled to a bracket 4 or the like extending from the frame 3 on the body (vehicle body) 2 side of the motorcycle 1. It is attached. The ceiling wall portion 17 includes a rectangular plate-shaped door portion 18 that is surrounded by a thin-walled planned breaking portion 17a, and the door portion 18 has the broken breaking portion 17a when it is pushed by the inflating airbag 21. It is made to break and is opened so as to rotate forward with the hinge portion 18a formed of an integral hinge on the front edge side as the center of rotation (see FIG. 2).

なお、実施形態の場合、シート12の前端付近におけるエアバッグ装置Mの収納部位14は、折り畳まれたエアバッグ21を収納したケース64と、支持材70の上端70a付近と、を収納する部位であって、取付ベース5上のカバー16で囲まれた部位としている。そして、この収納部位14は、シート12の前端付近における着座した乗員Dの左右の脚部K間付近に配置されている(図12参照)。   In the case of the embodiment, the storing portion 14 of the airbag apparatus M near the front end of the seat 12 is a portion storing the case 64 storing the folded airbag 21 and the vicinity of the upper end 70a of the support member 70. Thus, the portion is surrounded by the cover 16 on the mounting base 5. And this storage part 14 is arrange | positioned in the vicinity of the passenger | crew D who seated in the vicinity of the front end of the sheet | seat 12, and between the leg parts K (refer FIG. 12).

ケース64は、折り畳まれたエアバッグ21を収納するように、上方を開口させた箱形状の板金製として、長方形板状の底壁部65と、底壁部65の外周縁付近から上方に延びる略四角筒形状の周壁部66と、を備えて構成されている。底壁部65には、インフレーター62が、下方から挿通され、リテーナ59を利用して取り付けられている。なお、ケース64は、フレーム3から延びるブラケット4や取付ベース5に連結固定されている。   The case 64 is made of a box-shaped sheet metal that opens upward so as to accommodate the folded airbag 21, and extends upward from the rectangular plate-like bottom wall portion 65 and the vicinity of the outer peripheral edge of the bottom wall portion 65. And a peripheral wall portion 66 having a substantially rectangular tube shape. An inflator 62 is inserted into the bottom wall portion 65 from below and is attached using a retainer 59. The case 64 is connected and fixed to the bracket 4 and the mounting base 5 extending from the frame 3.

また、底壁部65には、周壁部66より後方に突出した部位の上面側に、規制ベルト55の下端55bを固定する固定杆68が配設されている(図2参照)。   In addition, a fixing rod 68 for fixing the lower end 55b of the regulating belt 55 is disposed on the bottom wall portion 65 on the upper surface side of a portion protruding rearward from the peripheral wall portion 66 (see FIG. 2).

インフレーター62は、図2に示すように、ケース64内に挿入される上部側に複数のガス吐出口62aを備えた円柱状としている。また、インフレーター62は、外周側に突出するフランジ部62bを備え、フランジ部62bが、リテーナ59を利用して、ケース64の底壁部65の下面側に固定されている。   As shown in FIG. 2, the inflator 62 has a cylindrical shape including a plurality of gas discharge ports 62 a on the upper side inserted into the case 64. The inflator 62 includes a flange portion 62 b that protrudes to the outer peripheral side, and the flange portion 62 b is fixed to the lower surface side of the bottom wall portion 65 of the case 64 using the retainer 59.

なお、エアバッグ21の後述する流入用開口24aの周縁には、四隅にボルト59aを備えた略四角環状のリテーナ59が配置されている。そして、リテーナ59のボルト59aを、エアバッグ21の流入用開口24aの周縁、ケース64の底壁部65、及び、フランジ部62bに貫通させて、ナット60止めすることにより、インフレーター62のフランジ部62bが、エアバッグ21とともに、ケース64の底壁部65に対して、固定されている。   A substantially square annular retainer 59 having bolts 59a at four corners is disposed on the periphery of an inflow opening 24a, which will be described later, of the airbag 21. Then, the bolt 59a of the retainer 59 is passed through the peripheral edge of the inflow opening 24a of the airbag 21, the bottom wall portion 65 of the case 64, and the flange portion 62b, and is fastened with the nut 60, thereby fixing the flange portion of the inflator 62. 62 b is fixed to the bottom wall portion 65 of the case 64 together with the airbag 21.

また、インフレーター62は、図示しないリード線によって、二輪車1に搭載された図示しない制御回路に電気的に接続され、二輪車1に衝撃が作用した際、制御回路が、衝撃を検知した所定の検知センサからの信号を入力して、インフレーター62に作動信号を出力することとなる。   The inflator 62 is electrically connected to a control circuit (not shown) mounted on the two-wheeled vehicle 1 by a lead wire (not shown), and when the shock is applied to the two-wheeled vehicle 1, the control circuit detects a predetermined detection sensor. The operation signal is output to the inflator 62.

支持材70は、チタン等の軽量な金属製として、図2,3に示すように、ケース64の前方側に配設されて、上下方向に延びる1本の四角筒形状の縦部材71と、縦部材71の上端で、縦部材71の軸直交方向の左右方向に延びる横部材72と、を備えて構成されている。縦部材71は、摺動しつつ上昇可能に、取付ベース5等に支持された案内部材80に保持されている。横部材72は、外形形状を円柱状とするように、円筒のパイプ材から形成され、左右方向に延びる軸心を、縦部材71の軸心より、若干、後方にオフセットさせて、縦部材71の上端71aに固着されている。また、横部材72は、縦部材71の上端71aに結合させた中央部72cから、左右対称的に左右両側に延びる左側部72aと右側部72bとを備えて、構成されている。左側部72aと右側部72bとには、前面73a側に、前後方向に貫通するねじ孔からなる締結孔74が、配設されている。各締結孔74には、連結ベルト42の先端45を横部材72の左側部72aと右側部72bとに固着させるためのボルト53が、締結される。   As shown in FIGS. 2 and 3, the support member 70 is made of a lightweight metal such as titanium, and is disposed on the front side of the case 64 and has a single rectangular tube-shaped vertical member 71 extending in the vertical direction. A horizontal member 72 extending in the left-right direction in the direction orthogonal to the axis of the vertical member 71 at the upper end of the vertical member 71 is configured. The vertical member 71 is held by a guide member 80 supported by the mounting base 5 or the like so as to be able to rise while sliding. The horizontal member 72 is formed of a cylindrical pipe material so that the outer shape is a columnar shape, and an axial center extending in the left-right direction is slightly offset rearward from the axial center of the vertical member 71, thereby Is fixed to the upper end 71a. The lateral member 72 includes a left side portion 72a and a right side portion 72b that extend symmetrically from the central portion 72c coupled to the upper end 71a of the vertical member 71 to the left and right sides. A fastening hole 74 made of a screw hole penetrating in the front-rear direction is disposed on the front surface 73a side on the left side portion 72a and the right side portion 72b. In each fastening hole 74, a bolt 53 for fastening the tip 45 of the connecting belt 42 to the left side 72a and the right side 72b of the transverse member 72 is fastened.

なお、支持材70の縦部材71と横部材72とには、強度を確保できる範囲で、一層の軽量化を図れるように、適宜、複数の肉盗み孔を設けてもよい。   It should be noted that the vertical member 71 and the horizontal member 72 of the support member 70 may be appropriately provided with a plurality of meat stealing holes so that the weight can be further reduced as long as the strength can be ensured.

さらに、支持材70は、左右方向の幅寸法W1を、収納位置WPから、乗員Dの左右の脚部K間を経て、上方に突出可能に、構成されて、支持材70における上方への突出を完了させたエアバッグ21の支持位置(引き上げ完了位置)SPへの配置時、上端70a側の配置位置を、膨張を完了させたエアバッグ21の上部21aの前面21c側を支持でき、かつ、後面70b側が上部21aによって覆われる位置、としている。   Further, the support member 70 is configured so that the width dimension W1 in the left-right direction can protrude upward from the storage position WP through the left and right legs K of the occupant D, and the support member 70 protrudes upward. When the airbag 21 that has been completed is disposed at the support position (lifting completion position) SP, the arrangement position on the upper end 70a side can be supported on the front surface 21c side of the upper portion 21a of the airbag 21 that has been inflated, and The rear surface 70b side is a position covered by the upper portion 21a.

なお、支持材70には、支持位置SPに配置された際の位置決めを行うように、フレーム3や案内部材80等に当接して位置規制される図示しないストッパが、配設されている。   In addition, the support member 70 is provided with a stopper (not shown) whose position is restricted by contacting the frame 3 and the guide member 80 so as to perform positioning when the support member 70 is disposed at the support position SP.

エアバッグ21は、図1〜5に示すように、袋状の周壁23を、略正方形の底壁部24と、底壁部24の外周縁から上方に延びる略四角筒形状の周壁本体部25と、から構成している。周壁本体部25は、エアバッグ21の前面21c側の前壁部26と、エアバッグ21の後面21d側の後壁部27と、底壁部24の上方で底壁部24と対向するように配置される天井壁部28と、を備えて構成され、前壁部26と後壁部27とが左右両縁で結合され、天井壁部28の外周縁が、前壁部26と後壁部27との上縁に結合されて構成されている。さらに具体的に説明すると、このエアバッグ21は、膨張完了時の形状として、前方側から見た形状を、下部21b側より上部21a側の左右方向の幅寸法を大きくする上広がりの略台形形状とするとともに、乗員Dの上半身Uを受け止める後面21dを拘束面36として、側方から見た形状を、下部21b側から上部21a側に向かうにつれて、前後方向の厚さ寸法を増大させるテーパ形状として、構成されている。なお、エアバッグ21は、単体での膨張完了時、左右方向の幅寸法BWを約510mm、前後方向の厚さ寸法BLを約320mmとしている。   As shown in FIGS. 1 to 5, the airbag 21 includes a bag-shaped peripheral wall 23 having a substantially square bottom wall portion 24 and a substantially rectangular tube-shaped peripheral wall main body portion 25 extending upward from the outer peripheral edge of the bottom wall portion 24. And consists of. The peripheral wall main body 25 faces the front wall portion 26 on the front surface 21 c side of the airbag 21, the rear wall portion 27 on the rear surface 21 d side of the airbag 21, and the bottom wall portion 24 above the bottom wall portion 24. The ceiling wall portion 28 is arranged, the front wall portion 26 and the rear wall portion 27 are joined at both left and right edges, and the outer peripheral edge of the ceiling wall portion 28 is the front wall portion 26 and the rear wall portion. 27 is coupled to the upper edge. More specifically, the airbag 21 has a substantially trapezoidal shape that expands from the lower side 21b side to the upper side 21a in the left-right direction as the shape when the inflation is completed. In addition, the rear surface 21d that catches the upper body U of the occupant D is used as a restraint surface 36, and the shape seen from the side is a tapered shape that increases the thickness dimension in the front-rear direction from the lower 21b side toward the upper portion 21a side. ,It is configured. The airbag 21 has a width dimension BW in the left-right direction of about 510 mm and a thickness dimension BL in the front-rear direction of about 320 mm when the inflation of the single body is completed.

そして、エアバッグ21は、実施形態の場合、周壁23を構成するアウタバッグとしての二次膨張バッグ部34と、二次膨張バッグ部34内に配設されるインナバッグとしての一次膨張バッグ部29と、を備えて構成されている。一次膨張バッグ部29と二次膨張バッグ部34とは、底壁部24を共用するように、相互に重ねられている。一次膨張バッグ部29は、底壁部24から上方に袋状に延びる周壁30の前側壁30aを、二次膨張バッグ部34の周壁35の前壁部、すなわち、エアバッグ21の周壁23の前壁部26、に結合させて配設されている。実施形態の場合、周壁30の前側壁30aと前壁部26とは、一次膨張バッグ部29の左右両縁付近で、上下方向に沿う縫合部位26aを設けて(図5参照)、縫合されている。   In the embodiment, the airbag 21 includes a secondary inflation bag portion 34 as an outer bag that constitutes the peripheral wall 23, and a primary inflation bag portion 29 as an inner bag disposed in the secondary inflation bag portion 34. And is configured. The primary inflatable bag portion 29 and the secondary inflatable bag portion 34 are overlapped with each other so as to share the bottom wall portion 24. The primary inflatable bag portion 29 has a front side wall 30a of the peripheral wall 30 extending upward in a bag shape from the bottom wall portion 24, a front wall portion of the peripheral wall 35 of the secondary inflatable bag portion 34, that is, in front of the peripheral wall 23 of the airbag 21. The wall portion 26 is coupled to the wall portion 26. In the case of the embodiment, the front side wall 30a and the front wall portion 26 of the peripheral wall 30 are sewn by providing stitched portions 26a along the vertical direction near the left and right edges of the primary inflatable bag portion 29 (see FIG. 5). Yes.

エアバッグ21の底壁部24には、膨張用ガスを流入させるための円形の流入用開口24aが形成されて、流入用開口24aの周縁には、リテーナ59の各ボルト59aを挿通させる取付孔24b(図5,6参照)が、形成されている。この流入用開口24aの周縁は、リテーナ59に押えられて、ケース64の底壁部65に取り付けられる(図2参照)。   The bottom wall 24 of the airbag 21 is formed with a circular inflow opening 24a for allowing the inflating gas to flow in. A mounting hole through which each bolt 59a of the retainer 59 is inserted in the periphery of the inflow opening 24a. 24b (see FIGS. 5 and 6) is formed. The peripheral edge of the inflow opening 24a is pressed by the retainer 59 and attached to the bottom wall portion 65 of the case 64 (see FIG. 2).

また、エアバッグ21は、前面21cの左右方向の中央の上端21t側、すなわち、天井壁部28の左右方向の中央の前縁28a、に、連結ベルト42の元部端43を連結させている。   Further, the airbag 21 has the base end 43 of the connecting belt 42 connected to the center upper end 21t side in the left-right direction of the front surface 21c, that is, the front edge 28a in the center in the left-right direction of the ceiling wall portion 28. .

そして、実施形態の場合、エアバッグ21の一次膨張バッグ部29が、実質的に、支持材70を引き上げるための駆動源を構成するものであり、その周壁30の前側壁30aを、既述したように、前壁部26に縫合させ、そして、周壁30の後側壁30bには、エアバッグ21の膨張完了時における一次膨張バッグ部29の上端側から下方に下がった左右方向の中央位置に、円形に開口する供給口31が配設されている。この一次膨張バッグ部29では、供給口31の上方のスペースが、支持材70を引き上げるために膨張用ガスGを貯留するガス溜り部32、を形成することとなる。   In the case of the embodiment, the primary inflating bag portion 29 of the airbag 21 substantially constitutes a drive source for pulling up the support member 70, and the front side wall 30a of the peripheral wall 30 has already been described. Thus, the front wall portion 26 is sewn, and the rear side wall 30b of the peripheral wall 30 is located at the center position in the left-right direction that is lowered downward from the upper end side of the primary inflation bag portion 29 when the airbag 21 is inflated. A supply port 31 opening in a circular shape is provided. In the primary inflatable bag portion 29, the space above the supply port 31 forms a gas reservoir portion 32 for storing the inflating gas G in order to pull up the support material 70.

二次膨張バッグ部34は、エアバッグ21の外周壁を構成することから、その周壁35が、エアバッグ21の周壁23と一致することとなる。   Since the secondary inflation bag portion 34 constitutes the outer peripheral wall of the airbag 21, the peripheral wall 35 thereof coincides with the peripheral wall 23 of the airbag 21.

エアバッグ21の後面21dの左右方向の中央の下端付近には、規制ベルト55の元部端55aが連結されている。規制ベルト55は、先端(下端)55b側を、ケース64の固定杆68に連結させており、エアバッグ21の膨張完了後、後面21d側の拘束面36によって前進移動する乗員Dの上半身Uを受け止めた際、エアバッグ21の流入用開口24aの周縁の後縁側が、捲れるように前方移動して、破損しないように、拘束面36の上方移動を規制するために、配設されている。   A base end 55a of the regulation belt 55 is connected to the vicinity of the lower end of the center of the rear surface 21d of the airbag 21 in the left-right direction. The restriction belt 55 has a front end (lower end) 55b side connected to a fixing rod 68 of the case 64, and after the inflation of the airbag 21 is completed, the upper body U of the occupant D that moves forward by the restraining surface 36 on the rear surface 21d side. The rear edge side of the peripheral edge of the inflow opening 24a of the airbag 21 is disposed in order to restrict the upward movement of the restraint surface 36 so that it does not break when it is received. .

そして、エアバッグ21の前面21cの上端21t側(天井壁部28の前縁28a側)に結合される連結ベルト42は、エアバッグ21に結合される略長方形板状の元部端43と、元部端43から左右方向に広がりつつ先端45側に延びる台形板状の中間部44と、支持材70の上端70aの横部材72に連結される先端45と、を備えて構成されている。元部端43は、天井壁部28の外表面側の前縁28aに対し、縫合部位43aを設けて、縫合して結合されている。先端45は、下端側の端縁から中間部44側に凹むような凹部45aを設けて、中間部44から左右に二又状に延びる分岐部46,46、を備えて構成されている(図5参照)。分岐部46は、それぞれ、先端側の取付部48と中間部44側の巻き付け部47とを備えて構成されている。取付部48には、ボルト53を挿通させる取付孔48aが、左右方向の中央に配設されている。   And the connection belt 42 couple | bonded with the upper end 21t side (front edge 28a side of the ceiling wall part 28) of the front surface 21c of the airbag 21 has the substantially rectangular plate-shaped base part end 43 couple | bonded with the airbag 21, A trapezoidal plate-like intermediate portion 44 that extends from the base end 43 in the left-right direction and extends toward the tip 45, and a tip 45 that is connected to the lateral member 72 of the upper end 70 a of the support member 70 are configured. The base portion end 43 is joined to the front edge 28a on the outer surface side of the ceiling wall portion 28 by providing a stitched portion 43a. The tip 45 is provided with a recess 45a that is recessed from the edge on the lower end side toward the intermediate portion 44, and includes branch portions 46 and 46 that extend from the intermediate portion 44 to the left and right. 5). Each of the branch portions 46 includes an attachment portion 48 on the distal end side and a winding portion 47 on the intermediate portion 44 side. A mounting hole 48a through which the bolt 53 is inserted is disposed in the mounting portion 48 at the center in the left-right direction.

左右の取付部48は、それぞれ、板金製の当板52を利用して、支持材70の横部材72における左側部72aと右側部72bとに取り付けられている。この取付状態は、左右の各巻き付け部47が、左側部72aや右側部72bの後方から下面73b側に配置されて、そして、各取付部48が、前面73aに配置され、さらに、板金製の当板52が前方から各取付部48に当てられ、各取付孔48aや当板52の挿通孔52aを経て、ボルト53が、横部材72の締結孔74に締め付けられることにより、連結ベルト42の先端45が、横部材72に固着されている。   The left and right attachment portions 48 are respectively attached to the left side portion 72a and the right side portion 72b of the transverse member 72 of the support member 70 using a sheet metal contact plate 52. In this attached state, the left and right winding portions 47 are disposed on the lower surface 73b side from the rear of the left side portion 72a and the right side portion 72b, and the respective attachment portions 48 are disposed on the front surface 73a. The contact plate 52 is applied to each mounting portion 48 from the front, and the bolt 53 is fastened to the fastening hole 74 of the transverse member 72 through each mounting hole 48a and the insertion hole 52a of the contact plate 52, so The tip 45 is fixed to the transverse member 72.

そして、連結ベルト42の先端45は、二又状に左右に分岐された分岐部46,46を、支持材70の上端70a、すなわち、横部材72、の左右方向の幅寸法W1の略全域に連結させている。   And the front-end | tip 45 of the connection belt 42 is bifurcated into the right and left bifurcated portions 46, 46 at the upper end 70a of the support member 70, that is, substantially the entire width dimension W1 of the horizontal member 72 in the left-right direction. It is connected.

なお、連結ベルト42の先端45では、エアバッグ21の膨張完了時における支持材70の支持位置SPへの配置時、横部材72の左側部72aや右側部72bの外周面73において、左右の巻き付け部47が、中間部44とともに、後面73cに圧接されることとなる(図2の二点鎖線参照)。   It should be noted that at the front end 45 of the connecting belt 42, when the support member 70 is disposed at the support position SP when the inflation of the airbag 21 is completed, the left and right wraps around the outer peripheral surface 73 of the left side portion 72a and the right side portion 72b of the lateral member 72. The part 47 is pressed against the rear surface 73c together with the intermediate part 44 (see the two-dot chain line in FIG. 2).

勿論、連結ベルト42では、元部端43から巻き付け部47までの中間部44付近が、エアバッグ21の一次膨張バッグ部29の膨張完了時に、略直線状に張る状態となり、そして、連結ベルト42の全体の上下方向の長さ寸法は、一次膨張バッグ部29の膨張に伴って、支持材70を支持位置SPまで引き上げることができるように、設定されている。   Of course, in the connection belt 42, the vicinity of the intermediate portion 44 from the base end 43 to the winding portion 47 is stretched substantially linearly when the primary inflation bag portion 29 of the airbag 21 is completely inflated, and the connection belt 42. The overall length in the vertical direction is set so that the support member 70 can be pulled up to the support position SP as the primary inflatable bag portion 29 expands.

また、連結ベルト42では、エアバッグ21における天井壁部28の前縁28aと結合される元部端43の左右方向の幅寸法W2、実施形態の場合、実質的な結合部位である左右両縁の前後方向に沿って延びた縫合部位43a,43a間の幅寸法W2が、支持材70の上端70aの左右方向の幅寸法W1の7〜9割の範囲内として、設定されている。   Further, in the connecting belt 42, the width dimension W2 in the left-right direction of the base end 43 that is coupled to the front edge 28a of the ceiling wall portion 28 in the airbag 21, in the case of the embodiment, the left and right edges that are substantial coupling sites. The width dimension W2 between the stitched portions 43a and 43a extending in the front-rear direction is set within a range of 70 to 90% of the width dimension W1 in the left-right direction of the upper end 70a of the support member 70.

実施形態の場合、支持材70の上端70a(横部材72)の左右方向の幅寸法W1は、160mm、連結ベルト42の元部端43の左右方向の幅寸法W2は、幅寸法W1の7.5割とした120mm、に設定されている。   In the case of the embodiment, the lateral width W1 of the upper end 70a (lateral member 72) of the support member 70 is 160 mm, and the lateral width W2 of the base end 43 of the connecting belt 42 is 7. It is set to 120 mm, which is 50%.

なお、実施形態のエアバッグ21は、図6に示すように、第1基布38、第2基布39、及び、第3基布40、から構成されている。第1基布38は、アウタバッグとしての二次膨張バッグ部34の底壁部24、前壁部26、及び、後壁部27を形成しており、底壁部24から前後両側に延びるように前壁部26と後壁部27とを配設させて、略鼓形状に形成されている。第2基布39は、略楕円板形状として、二次膨張バッグ部34の天井壁部28を形成している。第3基布40は、インナバッグとしての一次膨張バッグ部29を形成しており、底壁部24から前後両側に延びるように前側壁30aと後側壁30bとを配設させた帯状に形成されている。   In addition, the airbag 21 of embodiment is comprised from the 1st base fabric 38, the 2nd base fabric 39, and the 3rd base fabric 40, as shown in FIG. The first base fabric 38 forms a bottom wall portion 24, a front wall portion 26, and a rear wall portion 27 of a secondary inflatable bag portion 34 as an outer bag, and extends from the bottom wall portion 24 to the front and rear sides. The front wall portion 26 and the rear wall portion 27 are disposed on the front wall portion 26 to form a substantially drum shape. The second base fabric 39 has a substantially elliptical plate shape and forms the ceiling wall portion 28 of the secondary inflatable bag portion 34. The third base fabric 40 forms a primary inflatable bag portion 29 as an inner bag, and is formed in a belt shape in which a front side wall 30a and a rear side wall 30b are disposed so as to extend from the bottom wall portion 24 to both front and rear sides. ing.

なお、規制ベルト55は、規制ベルト用布57を二つ折りして、形成されている。また、連結ベルト42は、連結ベルト用布50を、二枚重ねとして、相互に縫合して、形成されている。   The regulation belt 55 is formed by folding the regulation belt cloth 57 in half. In addition, the connecting belt 42 is formed by stitching the connecting belt fabrics 50 in a stacked manner.

第1基布38、第2基布39、第3基布40、連結ベルト用布50、及び、規制ベルト用布57は、可撓性を有したポリアミドやポリエステル等の織布から形成されている。また、第1基布38や第3基布40の流入用開口24aの周縁には、補強のために、円環状の補強布(図符号省略)を設けてもよい。   The first base fabric 38, the second base fabric 39, the third base fabric 40, the connecting belt fabric 50, and the regulation belt fabric 57 are formed of a flexible woven fabric such as polyamide or polyester. Yes. Further, an annular reinforcing cloth (not shown) may be provided on the periphery of the inflow opening 24a of the first base cloth 38 or the third base cloth 40 for reinforcement.

エアバッグ21の製造は、まず、第1基布38や第3基布40に、予め、流入用開口24aと取付孔24bとを設け、さらに、予め形成しておいた連結ベルト42と規制ベルト55との元部端43,55aを、第2基布39や第1基布38の所定位置に縫合しておく。そして、第3基布40における一次膨張バッグ部29の前側壁30aを、縫合により、第1基布38におけるエアバッグ21の内周面側となる二次膨張バッグ部34の前壁部26に、縫合部位26a,26aを設けて、結合させ、ついで、第3基布40における一次膨張バッグ部29の前側壁30aと後側壁30bとの外周縁相互を重ねて縫合し、一次膨張バッグ部29を形成しておく。   In manufacturing the airbag 21, first, the inflow opening 24a and the mounting hole 24b are provided in the first base fabric 38 and the third base fabric 40 in advance, and the connection belt 42 and the regulation belt formed in advance are provided. The base ends 43 and 55a with 55 are sewn to predetermined positions of the second base cloth 39 and the first base cloth 38. Then, the front side wall 30a of the primary inflatable bag portion 29 in the third base fabric 40 is stitched to the front wall portion 26 of the secondary inflatable bag portion 34 on the inner peripheral surface side of the airbag 21 in the first base fabric 38. Then, the stitched portions 26a, 26a are provided and joined, and then the outer peripheral edges of the front side wall 30a and the rear side wall 30b of the primary inflatable bag portion 29 of the third base fabric 40 are overlapped and stitched, and the primary inflatable bag portion 29 Is formed.

ついで、第1基布38の前壁部26と後壁部27とを重ねるように、底壁部24の部位で第1基布38を折って、重ねた左右の縁25a,25b相互を縫合するとともに、第2基布39の外周縁を、対応する第1基布38の上縁に縫合し、エアバッグ21を袋状に形成する。そして、縫合代がエアバッグ21の外周側に露出しないように、二次膨張バッグ部34の流入用開口24aを利用して、一次膨張バッグ部29を内部に入れながら、二次膨張バッグ部34を裏返せば、エアバッグ21を得ることができる。   Next, the first base fabric 38 is folded at the bottom wall portion 24 so that the front wall portion 26 and the rear wall portion 27 of the first base fabric 38 are overlapped, and the left and right edges 25a and 25b are sewn together. At the same time, the outer peripheral edge of the second base fabric 39 is stitched to the upper edge of the corresponding first base fabric 38 to form the airbag 21 in a bag shape. Then, the secondary inflatable bag portion 34 is inserted into the primary inflatable bag portion 29 using the inflow opening 24a of the secondary inflatable bag portion 34 so that the stitching margin is not exposed to the outer peripheral side of the airbag 21. Is turned over, the airbag 21 can be obtained.

そして、エアバッグ装置Mの二輪車1への搭載の概略を述べると、先ず、ボルト59aを取付孔24bからエアバッグ21外に突出させるように、リテーナ59をエアバッグ21内にいれて、エアバッグ21を折り畳む。この折り畳みでは、ケース64の左右方向や前後方向の寸法に対応するように、エアバッグ21を折り畳む。   The outline of mounting the airbag apparatus M on the two-wheeled vehicle 1 will be described. First, the retainer 59 is placed in the airbag 21 so that the bolt 59a protrudes from the mounting hole 24b to the outside of the airbag 21. Fold 21. In this folding, the airbag 21 is folded so as to correspond to the dimensions of the case 64 in the left-right direction and the front-rear direction.

すなわち、図7のAに示すように、まず、天井壁部28を平らに展開させつつ後壁部27上に載せて、前壁部26と後壁部27とを重ねる。ついで、図7のBに示すように、連結ベルト42の元部端43を折り畳まないように、左右の縁25a,25b側から、天井壁部28側で、巻くようにロール折りして、エアバッグ21を折り畳む。その後、図7のCに示すように、エアバッグ21を蛇腹折りして、連結ベルト42の元部端43側を、底壁部24の流入用開口24aの上方に重ねれば、エアバッグ21の折り畳みを完了させることができる。   That is, as shown in FIG. 7A, first, the ceiling wall portion 28 is placed on the rear wall portion 27 while being flattened, and the front wall portion 26 and the rear wall portion 27 are overlapped. Next, as shown in FIG. 7B, the base end 43 of the connecting belt 42 is folded from the left and right edges 25a, 25b to the ceiling wall 28 so as not to be folded. The bag 21 is folded. Thereafter, as shown in FIG. 7C, the airbag 21 is folded in a bellows shape, and the base end 43 side of the connecting belt 42 is overlaid on the inflow opening 24 a of the bottom wall portion 24. Can be folded.

この時、実施形態では、折り畳まれたエアバッグ21の左右方向の幅寸法W3は、収納部位14内に円滑に収納されるように、支持材70の上端70aの左右方向の幅寸法W1より小さくしている。また、折り畳まれたエアバッグ21の左右方向の幅寸法W3は、連結ベルト42の元部端43を折り畳まないことから、連結ベルト42の元部端43の左右方向の幅寸法W2より大きく、設定されている(W2<W3<W1)。具体的には、実施形態の場合、幅寸法W3は、150mmとして、120mmの元部端43の幅寸法W2より大きく、160mmの支持材70の幅寸法W1より小さく設定されている。   At this time, in the embodiment, the width dimension W3 in the left-right direction of the folded airbag 21 is smaller than the width dimension W1 in the left-right direction of the upper end 70a of the support member 70 so as to be smoothly stored in the storage portion 14. is doing. Further, the width dimension W3 of the folded airbag 21 in the left-right direction is larger than the width dimension W2 in the left-right direction of the base end 43 of the connection belt 42 because the base end 43 of the connection belt 42 is not folded. (W2 <W3 <W1). Specifically, in the case of the embodiment, the width dimension W3 is set to 150 mm, which is larger than the width dimension W2 of the base end 43 of 120 mm and smaller than the width dimension W1 of the support member 70 of 160 mm.

なお、実施形態の場合、収納部位14の左右方向の幅寸法W0は、166mmとしている。ちなみに、この166mmの数値の部位は、円滑に、支持材70が収納部位14から突出するように、支持材70の上方に配置された扉部18の開いた際の開口17bの部位の数値であり、収納部位14の内部空間の左右方向の幅寸法W0H(図3参照)は、さらに大きな寸法の約178mmとしている。   In the case of the embodiment, the width dimension W0 of the storage portion 14 in the left-right direction is 166 mm. By the way, this numerical value part of 166 mm is a numerical value of the part of the opening 17 b when the door portion 18 arranged above the support material 70 is opened so that the support material 70 protrudes smoothly from the storage part 14. In addition, the width dimension W0H (see FIG. 3) in the left-right direction of the internal space of the storage portion 14 is about 178 mm, which is a larger dimension.

そして、折り畳みを完了したエアバッグ21は、折り崩れしないように、破断可能な図示しないラッピング材で包んでおく。ちなみに、連結ベルト42や規制ベルト55は、先端45,55b側を、ラッピング材から突出させるとともに、リテーナ59の各ボルト59aも、ラッピング材から突出させておき、さらに、エアバッグ21の流入用開口24aも、インフレーター62を挿入可能となるように、開口させておく。   The airbag 21 that has been folded is wrapped with a wrapping material (not shown) that can be broken so as not to collapse. Incidentally, the connecting belt 42 and the regulation belt 55 have the ends 45 and 55b protruding from the wrapping material, and the bolts 59a of the retainer 59 are also protruded from the wrapping material. 24a is also opened so that the inflator 62 can be inserted.

ついで、折り畳みを完了したエアバッグ21は、各ボルト59aを底壁部65から突出させるようにして、ケース64内に収納し、各ボルト59aをフランジ部62bに挿通させつつ、ケース64の底壁部65の下方から、インフレーター62を、ケース64内に挿入させ、各ボルト59aにナット60を締結する。   Next, the airbag 21 that has been folded is accommodated in the case 64 so that each bolt 59a protrudes from the bottom wall 65, and the bottom wall of the case 64 is inserted while the bolt 59a is inserted into the flange portion 62b. The inflator 62 is inserted into the case 64 from below the portion 65, and the nut 60 is fastened to each bolt 59a.

その後、規制ベルト55のループ状の下端(先端)55bを固定杆68に連結させるとともに、ケース64を、ブラケット4や取付ベース5に取り付け、さらに、連結ベルト42の先端45の左右の各取付部48を、フレーム3側に取り付け済みの支持材70の横部材72における左側部72aや右側部72bに対して、下面73b側から前面73a側に巻き付ける。さらに、各取付部48に当板52,52を当て、ボルト53を、挿通孔52aや取付孔48aを経て、締結孔74に締結して、各取付部48を左側部72aや右側部72bに取り付ければ、連結ベルト42の先端45を、支持材70に固着することができる。   Thereafter, the loop-like lower end (tip) 55b of the regulation belt 55 is connected to the fixing rod 68, the case 64 is attached to the bracket 4 and the mounting base 5, and the left and right attachment portions of the tip 45 of the connection belt 42 are also attached. 48 is wound from the lower surface 73b side to the front surface 73a side on the left side portion 72a and the right side portion 72b of the transverse member 72 of the support member 70 already attached to the frame 3 side. Further, the abutment plates 52 and 52 are applied to the respective attachment portions 48, the bolts 53 are fastened to the fastening holes 74 through the insertion holes 52a and the attachment holes 48a, and the respective attachment portions 48 are attached to the left side portion 72a and the right side portion 72b. When attached, the tip 45 of the connecting belt 42 can be fixed to the support member 70.

その後、インフレーター62に、所定の作動信号を入力させるリード線を結線するとともに、シート12やカバー16を装着すれば、エアバッグ装置Mを二輪車1に搭載することができる。   Thereafter, a lead wire for inputting a predetermined operation signal is connected to the inflator 62, and the airbag apparatus M can be mounted on the two-wheeled vehicle 1 by attaching the seat 12 and the cover 16.

そして、実施形態の二輪車1では、走行時に四輪自動車等と衝突して、エアバッグ装置Mが作動すれば、エアバッグ21の流入用開口24aに挿入されたインフレーター62が、各ガス吐出口62aから膨張用ガスGを吐出させることから、膨張用ガスGを流入させたエアバッグ21は、図8〜12に示すように、カバー16の扉部18を押し開きつつ、シート12に着座した乗員Dの左右の脚部K間付近の収納部位14から、上方側へ展開膨張して、前方側へ移動する乗員Dの上半身Uを拘束可能な形状に膨張を完了させる。   And in the two-wheeled vehicle 1 of embodiment, if it collides with a four-wheeled motor vehicle etc. at the time of driving | running | working and the airbag apparatus M act | operates, the inflator 62 inserted in the opening 24a for inflow of the airbag 21 will each gas discharge port 62a. Since the inflation gas G is discharged from the air bag 21, the airbag 21 into which the inflation gas G has flowed in is occupant seated on the seat 12 while pushing the door 18 of the cover 16 open, as shown in FIGS. From the storage portion 14 in the vicinity of the left and right legs K of D, the inflating is expanded to the upper side, and the expansion is completed to a shape that can restrain the upper body U of the occupant D moving to the front side.

その際、エアバッグ21の一次膨張バッグ部29が、膨張用ガスGを流入させて膨張すれば、図8〜10に示すように、供給口31より上方部位にガス溜り部32を形成し、ガス溜り部32の上昇に伴い、収納部位14から上方へ突出しつつ、連結ベルト42によって連結させた支持材70を、引き上げることとなる。
すなわち、エアバッグ21は、連結ベルト42を引っ張りつつ上方へ膨張することから、支持材70を引き上げ完了位置(エアバッグ21の支持位置)SPまで引き上げて、膨張を完了させることとなる。そして、膨張を完了させたエアバッグ21が乗員Dの上半身Uを受け止めることとなっても、図11に示すように、エアバッグ21の前面21c側には支持材70が配置されており、エアバッグ21は、前方移動せず、クッション性良く、乗員Dの上半身Uを受け止めることができる。
At that time, if the primary inflating bag portion 29 of the airbag 21 is inflated by flowing the inflating gas G, as shown in FIGS. As the gas reservoir 32 rises, the support member 70 connected by the connection belt 42 is pulled up while protruding upward from the storage portion 14.
That is, since the airbag 21 is expanded upward while pulling the connecting belt 42, the support member 70 is pulled up to the lifting completion position (supporting position of the airbag 21) SP to complete the expansion. And even if the airbag 21 which completed the inflation receives the upper body U of the passenger | crew D, as shown in FIG. 11, the support material 70 is arrange | positioned at the front surface 21c side of the airbag 21, The bag 21 does not move forward and can receive the upper body U of the occupant D with good cushioning properties.

この時、図12に示すように、二輪車1が斜突して、乗員Dが斜め方向からエアバッグ21の上端21t側に当接しても、エアバッグ21の上端21t側には、支持材70の上端70aに連結された幅広の連結ベルト42の元部端43が結合されている。そのため、支持材70の上端70aの横部材72に連結された連結ベルト42が、エアバッグ21の上端21t側の左右方向へのずれを抑制する。特に、エアバッグ21の上端21tに連結された連結ベルト42は、その元部端43の左右方向の幅寸法W2を、支持材70の上端70aの左右方向の幅寸法W1の7割以上として、広くしていることから、エアバッグ21の上端21t側の左右方向へ回転するようなずれを抑制できる。ちなみに、元部端43の左右方向の幅寸法W2が、支持材70の上端70tの左右方向の幅寸法W1の5〜6割程度と小さければ、図12の二点鎖線に示す実施形態のエアバッグ21と相違して、図12の一点鎖線に示す比較例のエアバッグ21のように、乗員Dの受止時に、左右方向に大きく回転するようにずれて、乗員Dがエアバッグに接触して受け止められるまでに、時間がかかってしまう。   At this time, as shown in FIG. 12, even if the two-wheeled vehicle 1 protrudes obliquely and the occupant D contacts the upper end 21 t side of the airbag 21 from an oblique direction, the support material 70 is placed on the upper end 21 t side of the airbag 21. The base end 43 of the wide connecting belt 42 connected to the upper end 70a is coupled. Therefore, the connecting belt 42 connected to the lateral member 72 at the upper end 70 a of the support member 70 suppresses the shift in the left-right direction on the upper end 21 t side of the airbag 21. In particular, the connecting belt 42 connected to the upper end 21t of the airbag 21 has a width W2 in the left-right direction of the base end 43 set to 70% or more of the width W1 in the left-right direction of the upper end 70a of the support member 70. Since it is wide, the shift | offset | difference which rotates to the left-right direction at the upper end 21t side of the airbag 21 can be suppressed. Incidentally, if the width dimension W2 in the left-right direction of the base end 43 is as small as about 50-60% of the width dimension W1 in the left-right direction of the upper end 70t of the support member 70, the air of the embodiment shown by the two-dot chain line in FIG. Unlike the bag 21, like the comparative example airbag 21 shown by the one-dot chain line in FIG. 12, when the occupant D is received, the occupant D is displaced so as to rotate greatly in the left-right direction, and the occupant D comes into contact with the airbag. It takes time to be accepted.

さらに、実施形態では、連結ベルト42が、元部端43の幅寸法W2を、支持材70の上端70aの左右方向の幅寸法W1の9割を超えないように、構成しており、支持材70の迅速な引き上げを阻害することも無い。ちなみに、連結ベルト42の元部端43が、支持材70の上端70aの幅寸法W1と同等、あるいは、支持材70の上端70aの幅寸法W1より大きければ、支持材70の迅速な引き上げを阻害してしまう。すなわち、エアバッグ21の膨張時における支持材70の引き上げ初期、連結ベルト42の元部端43付近では、連結ベルト42を介在させて、エアバッグ21の上端21tが支持材70の上端70a上に乗り上げ易く、図9,10の一点鎖線に示す比較例のように、その乗り上げた部位21uが、前方に大きく膨らめば、瞬間的に、下方への押圧力を作用させて、支持材70の上昇を抑制してしまう。そして、連結ベルト42の元部端43が、支持材70の上端70aの幅寸法W1と同等以上としていれば、その幅広の連結ベルト42の元部端43を介在させて、エアバッグ21の上端21tにおける支持材70の上端70aより左右に延びた部位も、支持材70の上方で前方側に膨らんで、図9,10の一点鎖線に示す比較例のように、乗り上げ部位21uとともに、支持材70を下方へ押圧するような作用を生じさせることとなって、支持材70の迅速な引き上げを阻害してしまう。そのため、連結ベルト42の元部端43が、実施形態のように、支持材70の上端70aの幅寸法W1の9割以下であれば、膨張時のエアバッグ21における支持材70の上端70aへの乗り上げ部位21v(図9の二点鎖線参照)が、少なくなって、支持材70への下方への押圧力を作用させ難くなり、エアバッグ21は、支持材70の迅速な引き上げを阻害しない。   Furthermore, in the embodiment, the connecting belt 42 is configured such that the width dimension W2 of the base end 43 does not exceed 90% of the width dimension W1 in the left-right direction of the upper end 70a of the support material 70. There is no hindrance to the rapid pulling of 70. Incidentally, if the base end 43 of the connecting belt 42 is equal to the width dimension W1 of the upper end 70a of the support member 70 or larger than the width dimension W1 of the upper end 70a of the support member 70, the rapid lifting of the support member 70 is hindered. Resulting in. That is, at the initial stage of pulling up the support member 70 when the airbag 21 is inflated, the upper end 21 t of the airbag 21 is placed on the upper end 70 a of the support member 70 in the vicinity of the base end 43 of the connection belt 42. As shown in the comparative example shown in the one-dot chain line in FIGS. 9 and 10, if the portion 21 u that has been swelled greatly expands forward, a downward pressing force is instantaneously applied to the support material 70. Will suppress the rise. If the base end 43 of the connection belt 42 is equal to or greater than the width dimension W1 of the upper end 70a of the support member 70, the base end 43 of the wide connection belt 42 is interposed, and the upper end of the airbag 21 is interposed. The part extending to the left and right from the upper end 70a of the support member 70 at 21t also swells forward above the support member 70, together with the riding part 21u, as in the comparative example shown by the one-dot chain line in FIGS. This causes an action of pressing the 70 downward, thereby hindering the quick lifting of the support material 70. Therefore, if the base part end 43 of the connection belt 42 is 90% or less of the width dimension W1 of the upper end 70a of the support member 70 as in the embodiment, the upper end 70a of the support member 70 in the airbag 21 at the time of inflation. The ride-on portion 21v (see the two-dot chain line in FIG. 9) is reduced, making it difficult to apply a downward pressing force to the support member 70, and the airbag 21 does not hinder the rapid pull-up of the support member 70. .

したがって、実施形態のエアバッグ装置Mでは、連結ベルト42の元部端43の幅寸法W2を所定範囲に設定するだけで、エアバッグ21による迅速な支持材70の引き上げを阻害すること無く、簡便に、乗員受止時のエアバッグ21の左右へのずれを抑制することができる。   Therefore, in the airbag apparatus M according to the embodiment, simply by setting the width dimension W2 of the base end 43 of the connecting belt 42 within a predetermined range, the airbag 21 can be easily lifted up without hindering the rapid lifting of the support material 70. Furthermore, the shift of the airbag 21 to the left and right when the occupant is received can be suppressed.

また、実施形態のエアバッグ装置Mのエアバッグ21では、支持材70の後方で折り畳まれて収納される左右方向の幅寸法W3(実施形態では150mm)が、連結ベルト42の元部端43の左右方向の幅寸法W2(実施形態では120mm)より大きく、かつ、支持材70の上端70aの左右方向の幅寸法W1(実施形態では160mm)より小さく設定されている。このような構成では、支持材70の上端70a側を収納する収納部位14の幅寸法W0(実施形態では1660mm)内に収納される範囲内で、かつ、エアバッグ21の上端21t側に結合される連結ベルト42の元部端43を折り畳まない状態で、エアバッグ21を折り畳むことができ、エアバッグ21の折り畳みを円滑に行うことができる。すなわち、エアバッグ21の折り畳み時の左右方向の幅寸法W3を、連結ベルト42の元部端43の幅寸法W2より小さくする場合には、連結ベルト42の元部端43も折り畳むこととなって、嵩張り、また、リバウンドするような折り崩れも発生し易くなって、エアバッグ21をコンパクトに折り畳むことが困難となってしまう。さらに、エアバッグ装置Mの支持材70等の収納部位14は、省スペースの観点から、剛性を有した支持材70に合わせて、左右方向の幅寸法W0が設定されており、エアバッグ21が、折り畳んだ幅寸法W3を、支持材70の上端70aの左右方向の幅寸法W1より小さくしていれば、折り畳んだエアバッグ21は、確実に、収納部位14より幅寸法W3を小さくできて、容易に、収納部位14に収納することができる。   Moreover, in the airbag 21 of the airbag apparatus M of the embodiment, the width dimension W3 (150 mm in the embodiment) in the left-right direction that is folded and stored behind the support member 70 is the width of the base end 43 of the connecting belt 42. It is set to be larger than the width dimension W2 in the left-right direction (120 mm in the embodiment) and smaller than the width dimension W1 in the left-right direction of the upper end 70a of the support member 70 (160 mm in the embodiment). In such a configuration, the support member 70 is coupled to the upper end 21t side of the airbag 21 within the range accommodated in the width W0 (1660 mm in the embodiment) of the storage portion 14 that stores the upper end 70a side. The airbag 21 can be folded in a state where the base end 43 of the connecting belt 42 is not folded, and the airbag 21 can be folded smoothly. That is, when the width dimension W3 in the left-right direction when the airbag 21 is folded is made smaller than the width dimension W2 of the base end 43 of the connecting belt 42, the base end 43 of the connecting belt 42 is also folded. In addition, the air bag 21 is easily bulky and rebounds, so that it is difficult to fold the airbag 21 in a compact manner. Further, the storage portion 14 such as the support member 70 of the airbag device M has a width dimension W0 in the left-right direction set in accordance with the rigid support member 70 from the viewpoint of space saving. If the folded width dimension W3 is smaller than the width dimension W1 in the left-right direction of the upper end 70a of the support member 70, the folded airbag 21 can surely have a smaller width dimension W3 than the storage part 14, It can be easily stored in the storage part 14.

なお、実施形態では、膨張完了時のエアバッグ21を支持する支持材70として、縦部材71と横部材72とを備えたT字形状のものを例示したが、支持材としては、左右に分離した二本の縦部材と、二本の縦部材の上端相互を連結する横部材と、を備えた逆U字状に構成したもの、あるいは、厚さ方向を前後方向に沿って配置させた長方形等の板状に構成したもの、等を利用しても良い。   In the embodiment, the support member 70 that supports the airbag 21 when the inflation is completed is exemplified as a T-shaped member including the vertical member 71 and the horizontal member 72. However, the support member is separated into right and left. Two vertical members and a transverse member that connects the upper ends of the two vertical members, or a rectangular shape having a thickness direction arranged in the front-rear direction. You may utilize what was comprised in plate shape, such as.

また、実施形態では、エアバッグ21内に、インナバッグのような一次膨張バッグ部29を設けた場合を示したが、膨張時のエアバッグが、支持材70を円滑に引き上げることができれば、エアバッグ内には、インナバッグのような一次膨張バッグ部29を設けなくとも良い。   Further, in the embodiment, the case where the primary inflating bag portion 29 such as the inner bag is provided in the air bag 21 is shown. However, if the air bag at the time of inflating can lift the support material 70 smoothly, the air bag It is not necessary to provide the primary inflating bag portion 29 such as an inner bag in the bag.

さらに、実施形態では、エアバッグ装置Mを、スクータ型の二輪車1に搭載した場合を示したが、他のスポーツバイクタイプ等の自動二輪車に、本発明のエアバッグ装置を搭載してもよい。   Furthermore, although the case where the airbag apparatus M was mounted in the scooter type motorcycle 1 was shown in the embodiment, the airbag apparatus of the present invention may be mounted on a motorcycle such as another sports bike type.

1…(自動)二輪車、
12…シート、
14…収納部位、
21…エアバッグ、
21c…前面、
21t…上端、
42…連結ベルト、
43…元部端、
45…先端、
70…支持材、
70a…上端、
70b…後面、
63c…下面、
G…膨張用ガス、
D…乗員、
K…脚部、
W1…(支持材の上端の左右方向の)幅寸法、
W2…(連結ベルトの元部端の左右方向の)幅寸法、
W3…(折り畳んだエアバッグの左右方向の)幅寸法。
1 ... (auto) motorcycles,
12 ... sheet,
14 ... storage part,
21 ... Airbag,
21c ... front,
21t ... upper end,
42 ... connecting belt,
43.
45 ... tip,
70 ... support material,
70a ... upper end,
70b ... rear side,
63c ... lower surface,
G ... expansion gas,
D ... Crew,
K ... Legs,
W1 ... width dimension (in the left-right direction of the upper end of the support material),
W2... Width dimension (in the left-right direction of the base end of the connecting belt),
W3 (width dimension of the folded airbag).

Claims (2)

膨張用ガスの流入時、シートに着座した乗員の左右の脚部の間付近に設けられた収納部位から上方側へ展開膨張して、前方側へ移動する乗員を受け止め可能に膨張を完了させるエアバッグと、
膨張完了時の前記エアバッグの前面側を支持可能に、前記エアバッグの前方側に配置される支持材と、
を備えて構成されるとともに、
前記エアバッグが、前記支持材を引き上げる駆動源として、前記支持材を前記収納部位から引き上げ可能に、前記支持材の上端に連結される可撓性を有した帯状の連結ベルトを、膨張完了時の前面の上端側における左右方向の中央に結合させている構成の自動二輪車用エアバッグ装置であって、
前記連結ベルトが、先端を前記支持材の上端の幅方向の略全域に連結させるとともに、前記エアバッグと結合される元部端の左右方向の幅寸法を、前記支持材の上端の左右方向の幅寸法の7〜9割の範囲内として、構成されていることを特徴とする自動二輪車用エアバッグ装置。
When inflating gas flows in, the air that expands and expands upward from the storage portion provided between the left and right legs of the occupant seated on the seat, and completes the expansion so as to receive the occupant moving forward With a bag,
A support member disposed on the front side of the airbag so as to be able to support the front side of the airbag when the inflation is completed;
And configured with
When the inflation is completed, a flexible belt-like connecting belt connected to the upper end of the support material is connected to the airbag so that the support material can be pulled up from the storage site as a drive source for lifting the support material. An airbag device for a motorcycle configured to be coupled to the center in the left-right direction on the upper end side of the front surface of the motorcycle,
The connecting belt connects the tip to substantially the entire width direction of the upper end of the support member, and the width dimension in the left-right direction of the base end coupled to the airbag is set in the left-right direction of the upper end of the support member. An airbag apparatus for a motorcycle, characterized in that the airbag apparatus is configured within a range of 70 to 90% of a width dimension.
前記エアバッグが、前記支持材の後方で折り畳まれて収納されて、折り畳まれた左右方向の幅寸法を、前記連結ベルトの元部端の左右方向の幅寸法より大きく、かつ、前記支持材の上端の左右方向の幅寸法より小さく設定して、配設されていることを特徴とする請求項1に記載の自動二輪車用エアバッグ装置。
The airbag is folded and stored behind the support member, and the width dimension in the left-right direction is larger than the width dimension in the left-right direction at the base end of the connection belt, and The airbag apparatus for a motorcycle according to claim 1, wherein the airbag apparatus is set to be smaller than a width dimension in a left-right direction at an upper end.
JP2010107184A 2010-05-07 2010-05-07 Airbag device for motorcycle Active JP5518564B2 (en)

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JP2011230733A (en) * 2010-04-30 2011-11-17 Toyoda Gosei Co Ltd Airbag device for motorcycle

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