WO2022230010A1 - Head-protecting airbag device - Google Patents

Head-protecting airbag device Download PDF

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Publication number
WO2022230010A1
WO2022230010A1 PCT/JP2021/016609 JP2021016609W WO2022230010A1 WO 2022230010 A1 WO2022230010 A1 WO 2022230010A1 JP 2021016609 W JP2021016609 W JP 2021016609W WO 2022230010 A1 WO2022230010 A1 WO 2022230010A1
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WO
WIPO (PCT)
Prior art keywords
upper chamber
airbag
gas
chamber
deployment
Prior art date
Application number
PCT/JP2021/016609
Other languages
French (fr)
Japanese (ja)
Inventor
洋平 松村
南巳 森
知久 宝達
Original Assignee
トヨタ車体株式会社
トヨタ自動車株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by トヨタ車体株式会社, トヨタ自動車株式会社 filed Critical トヨタ車体株式会社
Priority to PCT/JP2021/016609 priority Critical patent/WO2022230010A1/en
Publication of WO2022230010A1 publication Critical patent/WO2022230010A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/213—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in vehicle roof frames or pillars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/232—Curtain-type airbags deploying mainly in a vertical direction from their top edge

Definitions

  • the present disclosure relates to a head protection airbag device.
  • Patent Document 1 discloses a head protection airbag device that is arranged along the side roof inner panel of a vehicle.
  • gas for inflation and deployment is introduced into the curtain airbag from a gas supply section that operates when an impact occurs, so that the curtain airbag inflates and deploys so as to cover the side windows like a curtain. Therefore, the inflated and deployed curtain airbag can protect the occupant's head.
  • the present disclosure seeks to provide a head protection airbag device capable of increasing the deployment speed of a head protection chamber that constitutes a curtain airbag.
  • One aspect of the present disclosure is a curtain airbag that is inflatable and expandable stored in a roof side portion of a vehicle; a gas supply unit that supplies gas for inflation and deployment to the curtain airbag; with
  • the curtain airbag includes an upper chamber that inflates and deploys along the inner panel of the roof side portion by gas supply from the gas supply unit, and a lower chamber for head protection that inflates and deploys below the upper chamber.
  • the head protection airbag device wherein the upper chamber is configured to push down the lower chamber by utilizing a downward reaction force generated between the upper chamber and the interference member on the inner panel side when inflated and deployed; It is in.
  • gas for inflation and deployment is supplied from the gas supply unit to the curtain airbag when an impact occurs.
  • the upper and lower chambers of the curtain airbag are inflated and deployed.
  • the upper chamber expands and deploys along the inner panel of the roof side.
  • the lower chamber is inflated and deployed below the upper chamber to protect the occupant's head.
  • the upper chamber has the function of pushing down the lower chamber by utilizing the downward reaction force generated between it and the interference member on the inner panel side during inflation and deployment. According to this function, since the load with which the upper chamber urges the lower chamber downward increases, the deployment speed at which the lower chamber deploys toward the head protection area increases. As a result, the lower chamber can be quickly deployed in the head protection area by utilizing the reaction force that the upper chamber receives from the interfering member. Even when the curtain airbag is enlarged, it is effective in suppressing the lowering of the deployment speed of the lower chamber.
  • FIG. 1 is a side view showing a state in which the head protection airbag device of Embodiment 1 is mounted on a vehicle;
  • FIG. 2 is a cross-sectional view taken along line II-II in FIG.
  • FIG. 3 is a side view of the curtain airbag in FIG. 1 in a fully deployed state;
  • FIG. 6 is a cross-sectional view of the head protection airbag device of Embodiment 1 when the curtain airbag is in a fully deployed state;
  • FIG. 7 is a diagram corresponding to FIG. 3 of the head protection airbag device of Embodiment 2;
  • FIG. 8 is a cross-sectional view of the head protection airbag device of Embodiment 3, corresponding to FIG.
  • This head-protecting airbag device is installed in a vehicle and configured as an airbag device that protects the head of an occupant riding in the vehicle.
  • an arrow FR indicates the front of the vehicle in which the head protection airbag device is installed
  • UP indicates the upper side of the vehicle
  • an arrow indicates the inside of the vehicle.
  • IN shall be denoted by IN.
  • the arrow X indicates the vehicle length direction
  • the arrow Y indicates the vehicle width direction
  • the arrow Z indicates the vehicle height direction.
  • inflation refers to a mode in which the curtain airbag expands and becomes larger due to the supply of gas to the interior space of the curtain airbag.
  • inflating and deploying refers to a mode in which a curtain airbag that has been folded in a predetermined shape in advance expands so as to release the folded state in the process of inflating. The operation of the curtain airbag at this time can be simply called “deployment” instead of “inflation and deployment".
  • a head protection airbag device (hereinafter also simply referred to as “airbag device”) 101 of Embodiment 1 is mounted on a vehicle 1 .
  • the airbag device 101 is configured to be provided along the inner panel 3 on the roof side portions 2 on the left and right upper portions of the vehicle 1 .
  • the airbag device 101 includes a curtain airbag (hereinafter simply referred to as “airbag”) 10 and a gas supply section 20 that supplies gas for inflation and deployment to the airbag 10 .
  • airbag curtain airbag
  • gas supply section 20 that supplies gas for inflation and deployment to the airbag 10 .
  • the airbag 10 is stored in the housing space 2a of the roof side portion 2 in a pre-folded storage state C1 so as to be inflatable and deployable like a curtain.
  • the folded state of the airbag 10, which is in the stored state C1 typically adopts a roll-like or bellows-like folding mode.
  • the airbag 10 is finally in the deployment completion state C3 as a result of the gas for inflation and deployment being supplied from the gas supply section 20 .
  • the airbag 10 substantially entirely covers the side windows 6 (the front window 6a and the rear window 6b) of the vehicle 1 in the fully deployed state C3 (see the two-dot chain line in FIG. 1). cover in shape.
  • the airbag 10 in the fully deployed state C3 is configured such that the bag upper end overlaps the roof side portion 2 and the bag lower end overlaps the upper end portion of the door trim portion 5 of the vehicle 1 in the vehicle width direction Y.
  • the "deployment completion state C3" referred to here refers to a state in which the airbag 10 is deployed in a plane along a plane determined by both the vehicle length direction X and the vehicle height direction Z due to inflation.
  • the side view shape of the airbag 10 in the vehicle width direction Y in the deployment completed state C3 is the same as that of the unfolded airbag 10 in the vehicle width direction Y, except that it is thicker in the vehicle width direction Y. It roughly matches the shape.
  • the airbag 10 is typically made of a sheet-like base fabric made of a low-permeability and flexible material woven from synthetic fibers.
  • the airbag 10 is formed by overlapping a plurality of base fabrics and molding them into a bag shape using joining such as stitching or bonding.
  • the airbag 10 is accommodated and held in the case 11 in its retracted state C1.
  • the case 11 is attached to the inner panel 3 forming the roof side portion 2 .
  • the case 11 has a cross-sectional shape such that an opening 11a is formed on the compartment side.
  • the case 11 is configured so as to allow the airbag 10 to be accommodated from the passenger compartment side through the opening 11a, or to allow the airbag 10 to protrude toward the passenger compartment through the opening 11a. ing. Therefore, the user can store the airbag 10 in the case 11 from the passenger compartment side through the opening 11a. Further, the airbag 10 housed in the case 11 can protrude toward the passenger compartment through the opening 11a when deployed and inflated.
  • the case 11 is a member on the inner panel 3 side attached to the inner panel 3, and serves as an interference member that interferes with the projecting portion 14 of the upper chamber 12, which will be described later, when the airbag 10 is inflated and deployed.
  • the airbag 10 is covered from the passenger compartment side by the interior material 4 in its retracted state C1.
  • the interior material 4 is composed of a roof headlining, a garnish, and the like made of a synthetic resin material.
  • the interior material 4 is provided with a thin portion for the door portion 4a covering the lower surface of the airbag 10. As shown in FIG. It is preferable that the thin portion is formed by a split line or a hinge line formed in the interior material 4 .
  • the airbag 10 has a plurality of chambers including a front seat side chamber and a rear seat side chamber.
  • the internal space of the bag-shaped airbag 10 is partitioned into a plurality of chambers with a plurality of joining lines 10c interposed therebetween.
  • the front seat side chamber is composed of an upper chamber 12 and a lower chamber 15 .
  • the airbag 10 is constructed such that the volume of the upper chamber 12 is less than the volume of the lower chamber 15 .
  • the airbag 10 is connected to the roof side portion 2 by a plurality of straps 17 spaced apart from each other in the longitudinal direction X of the vehicle.
  • the gas supply section 20 is housed in the housing space 2a of the roof side section 2 together with the airbag 10.
  • This gas supply unit 20 has an inflator 21 as a gas generator and a diffuser 22 for distributing the gas generated by the inflator 21 .
  • the inflator 21 is configured to operate and generate the gas G when a sensor (not shown) provided in the vehicle 1 receives an impact exceeding a threshold.
  • the diffuser 22 is configured to distribute the gas G generated by the inflator 21 to the front chamber (the upper chamber 12 and the lower chamber 15) and the rear chamber.
  • the diffuser 22 has two gas introduction ports 22a and 22b. According to this diffuser 22, the gas G is introduced into the front chamber through the gas introduction port 22a, and the gas G is introduced into the rear chamber through the gas introduction port 22b. A portion of the airbag 10 corresponding to the gas introduction port 22a of the diffuser 22 serves as a gas introduction portion 10d through which the gas G is introduced into the upper chamber.
  • the upper chamber 12 is configured to be inflated and deployed along the inner panel 3 (see FIG. 2) of the roof side section 2 by gas supply from the gas supply section 20 .
  • the lower chamber 15 is configured to be inflated and deployed below the upper chamber 12 by gas supply from the gas supply section 20 .
  • This lower chamber 15 expands and deploys on the side of the head protection area H.
  • the head protection area H is set in advance as an area effective for head protection, assuming the arrangement and movement of the occupant's head T. As shown in FIG. Therefore, the lower chamber 15 becomes a substantial head protection chamber among the plurality of chambers.
  • the upper chamber 12 has a gas flow path 13 through which the gas G can flow.
  • the gas flow path 13 extends linearly in the gas flow direction D1 along the inner panel 3 as a whole. Part of the gas G introduced from the gas introduction port 22a of the diffuser 22 into the gas channel 13 of the upper chamber 12 flows through the gas channel 13 substantially linearly in the gas flow direction D1.
  • the upper chamber 12 is provided with a protruding portion 14 having a cross-sectional shape of the gas channel 13 that partially protrudes upward in the vehicle height direction Z when inflated and deployed. Therefore, when the upper chamber 12 is inflated and deployed, the protruding portion 14 forms a knob-like shape protruding upward from the main flow portion of the gas flow path 13 .
  • the upper chamber 12 is configured such that the cross-sectional area of the gas flow path 13 in the gas G-filled state is the largest at the projecting portion 14 and substantially the same at the portions other than the projecting portion 14 .
  • the channel cross section of the portion other than the projecting portion 14 has substantially the same shape.
  • the upper chamber 12 is configured such that the width of the gas flow path 13 in the vehicle height direction Z is the largest at the protruding portion 14 and substantially the same at the portions other than the protruding portion 14 .
  • the remainder of the gas G introduced into the internal space of the airbag 10 from the gas inlet 22a of the diffuser 22 is directed downward and forward through the gas flow path 16 of the lower chamber 15 toward a location corresponding to the head protection region H. It flows in flow direction D2.
  • the gas G further flows downward in the gas flow direction D3, thereby filling the lower chamber 15 with the gas G. As shown in FIG.
  • FIG. 1 the state of the inflation and deployment process of the airbag 10 will be described with reference to FIGS. 3 to 6.
  • the gas G generated when the inflator 21 is activated is introduced through the diffuser 22 into the internal space of the airbag 10 in the retracted state C1.
  • the gas G flows into the upper chamber 12 of the airbag 10 in the gas flow direction D1 with the gas flow path 13 facing forward in the vehicle length direction X.
  • the upper chamber 12 is inflated and deployed elongated in the vehicle length direction X, thus completing the inflation and deployment.
  • the gas G flows through the gas flow path 16 in the gas flow directions D2 and D3.
  • the capacity of the lower chamber 15 exceeds the capacity of the upper chamber 12
  • inflation and deployment are completed after the upper chamber 12 completes inflation and deployment.
  • the protrusion 14 of the upper chamber 12 interferes with the case 11 as an interference member on the inner panel 3 side during inflation and deployment, and the upper wall portion 11b is pushed down. Press upwards.
  • the intermediate deployment state C2 is a state before the airbag 10 is deployed and inflated from the stored state C1 and reaches the deployment completed state C3.
  • the projecting portion 14 of the upper chamber 12 receives a downward reaction force F at the contact portion with the upper wall portion 11 b of the case 11 .
  • the upper chamber 12 is pushed back downward at the protrusion 14 .
  • the upper chamber 12 can increase the load pushing down the lower chamber 15 by utilizing the downward reaction force F generated between the upper chamber 12 and the case 11 on the inner panel 3 side during inflation and deployment.
  • the internal space of the projecting portion 14 is partitioned by an upper wall 14a, a front wall 14b, and a rear wall 14c, all of which are formed by joining lines 10c.
  • the upper wall 14a extends along the gas flow direction D1.
  • the front wall 14b is provided downstream in the gas flow direction D1 continuously from the upper wall 14a, and extends so as to intersect the gas flow direction D1.
  • the rear wall 14c is provided on the upstream side of the gas flow direction D1 continuously from the upper wall 14a, and extends so as to intersect the gas flow direction D1.
  • the projecting portion 14 is selectively arranged at a position above the head protection area H when the upper chamber 12 is inflated and deployed.
  • the protruding portion 14 is positioned on an imaginary line in the vehicle height direction Z that passes through the head protection area H.
  • This position is within the gas distribution range R from the gas introduction portion 10d through which the gas G is introduced into the upper chamber 12 to the head protection region H in the vehicle length direction X.
  • the projecting portion 14 By arranging the projecting portion 14 at this position, the size of the projecting portion 14 in the vehicle length direction X can be suppressed, and the effect of the upper chamber 12 pushing down the lower chamber 15 can be pinpointed.
  • the lower chamber 15 is pushed down by the upper chamber 12, and the gas G flows downward in the space of the lower chamber 15, so that the airbag 10 is lowered as a whole to reach a deployment completion state C3. become.
  • the airbag 10 in the deployed state C3 covers the front seat window 6a from the passenger compartment side while the lower chamber 15 contacts the front seat window 6a in the head protection area H, thereby protecting the occupant's head T. Form a protective surface to protect. Therefore, the lower chamber 15 can receive the head T of the occupant in the head protection area H when the head T moves toward the front seat window 6a.
  • the protrusion 14 that is the upper end of the upper chamber 12 of the airbag 10 overlaps the case 11 on the side of the roof side portion 2
  • the lower end 15 a of the lower chamber 15 overlaps the door trim portion 5 of the vehicle 1 . Inflate and expand so that it overlaps with.
  • the airbag 10 in the fully deployed state C3 is supported by the vehicle 1 at least at two different locations in the vehicle height direction Z (the roof side portion 2 and the door trim portion 5), and movement toward the outside of the vehicle is restricted. be done. This allows the lower chamber 15 to stably receive the occupant's head T in the head protection region H.
  • the protruding portion 14 of the upper chamber 12 is configured to have the function of pushing down the lower chamber 15 during inflation and deployment, as well as the function of restricting the movement of the airbag 10 toward the outside of the vehicle.
  • This configuration is effective in simplifying the structure compared to the case where these two functions are realized by separate elements.
  • gas for inflation and deployment is supplied from the gas supply section 20 to the airbag 10 when an impact occurs.
  • the upper chamber 12 and the lower chamber 15 of the airbag 10 are inflated and deployed.
  • the upper chamber 12 inflates and deploys along the inner panel 3 of the roof side portion 2 .
  • the lower chamber 15 is inflated and deployed below the upper chamber 12 to protect the head T of the occupant.
  • the upper chamber 12 has the function of pushing down the lower chamber 15 by utilizing the downward reaction force F generated between it and the case 11 on the inner panel 3 side during inflation and deployment. According to this function, the load with which the upper chamber 12 urges the lower chamber 15 downward increases, so the deployment speed at which the lower chamber 15 deploys toward the head protection area H increases. As a result, the lower chamber 15 can be deployed in the head protection area H at an early stage by utilizing the reaction force that the upper chamber 12 receives from the case 11 . Even when the airbag 10 is enlarged, it is effective in suppressing the lowering of the deployment speed of the lower chamber 15 .
  • Embodiment 1 it is possible to provide the airbag device 101 capable of increasing the deployment speed of the head protection lower chamber 15 constituting the airbag 10 .
  • the upper chamber 12 strengthens the lower chamber 15 by a simple structural change in which the cross-sectional shape of the gas passage 13 of the upper chamber 12 is partially changed to provide the projecting portion 14. You can get the pushing effect. As a result, the desired effect can be obtained at a low cost compared to adopting an expensive structure such as an increase in the capacity of the inflator 21 side.
  • the airbag device 102 of the second embodiment differs from the airbag device 101 of the first embodiment in the shape and arrangement of the projecting portion 14A in the upper chamber 12. As shown in FIG.
  • the cross-sectional shape of the gas passage 13 of the protrusion 14A is partially upward in the vehicle height direction Z when the upper chamber 12 is inflated and deployed. It has a protruding shape.
  • the projecting portion 14A is different from the projecting portion 14A in the vehicle length direction X from the gas introduction portion 10d through which the gas G is introduced into the upper chamber 12 when the upper chamber 12 is inflated and deployed. It is shaped such that it is arranged over the entire gas flow range R up to the protection area H.
  • the length of the projecting portion 14A in the vehicle length direction X exceeds the length of the projecting portion 14 in the vehicle length direction X of the first embodiment.
  • a portion of the gas passage 13 of the upper chamber 12 corresponding to the gas flow range R is a region where the gas flow is relatively strong. It is effective in strengthening the downward reaction force F.
  • the airbag device 102 of the second embodiment compared with the airbag device 101 of the first embodiment, by increasing the length of the projecting portion 14A in the vehicle length direction X, the upper chamber 12 is expanded to the lower chamber at the projecting portion 14A.
  • the downward reaction force F received from 15 can be strengthened. Therefore, the deployment speed at which the lower chamber 15 deploys toward the head protection area H can be further increased.
  • the airbag device 103 of the third embodiment differs from the airbag device 101 of the first embodiment in the structure in which the upper chamber 12 receives the downward reaction force F to push down the lower chamber 15. is doing.
  • the portion corresponding to the projecting portion 14 of the upper chamber 12 is omitted.
  • a projecting portion 11c is provided, which projects outwardly.
  • the upper chamber 12 interferes with the protruding portion 11c of the case 11 during inflation and deployment, and receives a downward reaction force F at the contact portion with the protruding portion 11c.
  • the projecting portion 11 c may be configured by a part of the case 11 or may be configured by a separate member joined to the case 11 .
  • the structure of the upper chamber 12 of the airbag 10 is reduced by omitting the portion corresponding to the projecting portion 14 of the upper chamber 12. can be simplified, and the manufacturing cost of the airbag 10 can be reduced.
  • the upper chamber 12 is arranged such that the protruding portions 14 and 14A are arranged within the gas flow range R from the gas introduction portion 10d to the head protection region H in the vehicle length direction X when the upper chamber 12 is inflated and deployed.
  • the positions at which the protruding portions 14 and 14A are arranged are not limited to this, and can be appropriately changed as necessary.
  • the interference member with which the protrusions 14 and 14A interfere is limited to the case 11.
  • various members that are directly or indirectly attached to the inner panel 3 can be employed as this interference member.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

A head-protecting airbag device (101) comprises a curtain airbag (10) stored in a roof side part (2) of a vehicle (1) so as to be inflatable and deployable, and a gas supply part (20) that supplies gas for inflation and deployment to the curtain airbag (10). The curtain airbag (10) has an upper chamber (12) inflated and deployed along an inner panel (3) of the roof side part (2) by gas supply from the gas supply part (20), and a head-protecting lower chamber (15) that is inflated and deployed below the upper chamber (12). The upper chamber (12) is configured so as to push down on the lower chamber (15) using downward reactive force produced between the upper chamber (12) and a case (11) serving as an interference member on the inner panel (3) side during inflation and deployment.

Description

頭部保護用エアバッグ装置Airbag device for head protection
　本開示は、頭部保護用エアバッグ装置に関する。 The present disclosure relates to a head protection airbag device.
　下記の特許文献１には、車両のサイドルーフインナーパネルに沿って配置される頭部保護用エアバッグ装置が開示されている。このエアバッグ装置において、衝撃発生時に作動するガス供給部からカーテンエアバッグに膨張展開用のガスが導入されることによって、カーテンエアバッグが側方窓部をカーテン状に覆うように膨張展開する。このため、膨張展開したカーテンエアバッグによって乗員の頭部の保護を図ることが可能になる。 Patent Document 1 below discloses a head protection airbag device that is arranged along the side roof inner panel of a vehicle. In this airbag device, gas for inflation and deployment is introduced into the curtain airbag from a gas supply section that operates when an impact occurs, so that the curtain airbag inflates and deploys so as to cover the side windows like a curtain. Therefore, the inflated and deployed curtain airbag can protect the occupant's head.
特開２００６－１５８４６号公報JP-A-2006-15846
　上記の頭部保護用エアバッグ装置において、例えばカーテンエアバッグの大型化に要請に伴ってバッグ容量が増えると、カーテンエアバッグを構成する複数のチャンバーのそれぞれにガスが行き渡るまでの時間が延びる傾向がある。この場合、複数のチャンバーのうち乗員の頭部の保護を担う頭部保護用のチャンバーの展開速度が低下するという問題が生じ得る。 In the above head protection airbag device, for example, when the bag capacity is increased in accordance with the demand for larger curtain airbags, there is a tendency that the time required for gas to spread through each of the plurality of chambers that constitute the curtain airbag is extended. There is In this case, a problem may arise in that the expansion speed of the head protecting chamber responsible for protecting the occupant's head among the plurality of chambers decreases.
　そこで、この種のエアバッグ装置の設計では、頭部保護用のチャンバーをその展開速度を高めて早期に頭部保護領域で展開させるための技術が求められる。その際、装置コストが高くなるのを抑えるために、インフレータ側の機器の能力をアップする等の対策の採用を回避するのが好ましい。 Therefore, in the design of this type of airbag device, a technology is required to increase the deployment speed of the head protection chamber and quickly deploy it in the head protection area. In this case, it is preferable to avoid adopting countermeasures such as increasing the capacity of the inflator-side device in order to suppress the increase in device cost.
　本開示は、カーテンエアバッグを構成する頭部保護用のチャンバーの展開速度を高めることができる頭部保護用エアバッグ装置を提供しようとするものである。 The present disclosure seeks to provide a head protection airbag device capable of increasing the deployment speed of a head protection chamber that constitutes a curtain airbag.
　本開示の一態様は、
　車両のルーフサイド部に膨張展開可能に格納されるカーテンエアバッグと、
　上記カーテンエアバッグに膨張展開用のガスを供給するガス供給部と、
を備え、
　上記カーテンエアバッグは、上記ガス供給部からのガス供給により、上記ルーフサイド部のインナーパネルに沿って膨張展開する上部チャンバーと、上記上部チャンバーの下方で膨張展開する頭部保護用の下部チャンバーと、を有し、
　上記上部チャンバーは、膨張展開時に上記インナーパネル側の干渉部材との間で生じる下向きの反力を利用して上記下部チャンバーを押し下げるように構成されている、頭部保護用エアバッグ装置、
にある。 One aspect of the present disclosure is
a curtain airbag that is inflatable and expandable stored in a roof side portion of a vehicle;
a gas supply unit that supplies gas for inflation and deployment to the curtain airbag;
with
The curtain airbag includes an upper chamber that inflates and deploys along the inner panel of the roof side portion by gas supply from the gas supply unit, and a lower chamber for head protection that inflates and deploys below the upper chamber. , and
The head protection airbag device, wherein the upper chamber is configured to push down the lower chamber by utilizing a downward reaction force generated between the upper chamber and the interference member on the inner panel side when inflated and deployed;
It is in.
　上記態様の頭部保護用エアバッグ装置において、衝撃発生時にガス供給部からカーテンエアバッグに膨張展開用のガスが供給される。このとき、カーテンエアバッグの上部チャンバーと下部チャンバーがそれぞれ膨張展開する。上部チャンバーは、ルーフサイド部のインナーパネルに沿って膨張展開する。下部チャンバーは、上部チャンバーの下方で膨張展開して乗員の頭部の保護に供される。 In the head protection airbag device of the aspect described above, gas for inflation and deployment is supplied from the gas supply unit to the curtain airbag when an impact occurs. At this time, the upper and lower chambers of the curtain airbag are inflated and deployed. The upper chamber expands and deploys along the inner panel of the roof side. The lower chamber is inflated and deployed below the upper chamber to protect the occupant's head.
　ここで、上部チャンバーは、膨張展開時にインナーパネル側の干渉部材との間で生じる下向きの反力を利用して下部チャンバーを押し下げる機能を有する。この機能によれば、上部チャンバーが下部チャンバーを下向きに付勢する荷重が上昇するため、下部チャンバーが頭部保護領域に向けて展開する展開速度が高くなる。これにより、上部チャンバーが干渉部材から受ける反力を利用することで下部チャンバーを早期に頭部保護領域で展開させることができる。カーテンエアバッグが大型化されるような場合でも、下部チャンバーの展開速度が低下するのを抑えるのに有効である。 Here, the upper chamber has the function of pushing down the lower chamber by utilizing the downward reaction force generated between it and the interference member on the inner panel side during inflation and deployment. According to this function, since the load with which the upper chamber urges the lower chamber downward increases, the deployment speed at which the lower chamber deploys toward the head protection area increases. As a result, the lower chamber can be quickly deployed in the head protection area by utilizing the reaction force that the upper chamber receives from the interfering member. Even when the curtain airbag is enlarged, it is effective in suppressing the lowering of the deployment speed of the lower chamber.
　以上のごとく、上記態様によれば、カーテンエアバッグを構成する頭部保護用のチャンバーの展開速度を高めることができる頭部保護用エアバッグ装置を提供することができる。 As described above, according to the above aspect, it is possible to provide a head protection airbag device that can increase the deployment speed of the head protection chamber that constitutes the curtain airbag.
　なお、請求の範囲に記載した括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示すものであり、本開示の技術的範囲を限定するものではない。 It should be noted that the symbols in parentheses described in the claims indicate the correspondence with specific means described in the embodiments described later, and do not limit the technical scope of the present disclosure.
　本開示についての上記目的およびその他の目的、特徴や利点は、添付の図面を参照しながら下記の詳細な記述により、より明確になる。その図面は、
図１は、実施形態１の頭部保護用エアバッグ装置を車両に搭載された状態にて示す側面図であり、 図２は、図１のII-II線断面矢視図であり、 図３は、図１中のカーテンエアバッグが展開完了状態にあるときの側面視を示す図であり、 図４は、図２においてカーテンエアバッグが展開中間状態にあるときの断面図であり、 図５は、図３においてカーテンエアバッグが展開中間状態にあるときの下部チャンバーの側面視を示す図であり、 図６は、実施形態１の頭部保護用エアバッグ装置をカーテンエアバッグが展開完了状態にあるときの断面図であり、 図７は、実施形態２の頭部保護用エアバッグ装置について図３に対応した図であり、 図８は、実施形態３の頭部保護用エアバッグ装置について図４に対応した断面図である。 The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description with reference to the accompanying drawings. The drawing is
FIG. 1 is a side view showing a state in which the head protection airbag device of Embodiment 1 is mounted on a vehicle; FIG. 2 is a cross-sectional view taken along line II-II in FIG. FIG. 3 is a side view of the curtain airbag in FIG. 1 in a fully deployed state; FIG. 4 is a cross-sectional view of the curtain airbag in an intermediate state of deployment in FIG. 5 is a side view of the lower chamber when the curtain airbag is in an intermediate state of deployment in FIG. 3, FIG. 6 is a cross-sectional view of the head protection airbag device of Embodiment 1 when the curtain airbag is in a fully deployed state; FIG. 7 is a diagram corresponding to FIG. 3 of the head protection airbag device of Embodiment 2; FIG. 8 is a cross-sectional view of the head protection airbag device of Embodiment 3, corresponding to FIG.
　以下、頭部保護用エアバッグ装置に係る実施形態について、図面を参照しつつ説明する。この頭部保護用エアバッグ装置は、車両に搭載され、その車両に乗車する乗員の頭部の保護を行うエアバッグ装置として構成される。 An embodiment of a head protection airbag device will be described below with reference to the drawings. This head-protecting airbag device is installed in a vehicle and configured as an airbag device that protects the head of an occupant riding in the vehicle.
　なお、本明細書及び図面では、特に断わらない限り、頭部保護用エアバッグ装置が搭載される車両の前方を矢印ＦＲで示し、この車両の上方をＵＰで示し、この車両の内方を矢印ＩＮで示すものとする。また、車長方向を矢印Ｘで示し、車幅方向を矢印Ｙで示し、車高方向を矢印Ｚで示すものとする。 In the present specification and drawings, unless otherwise specified, an arrow FR indicates the front of the vehicle in which the head protection airbag device is installed, UP indicates the upper side of the vehicle, and an arrow indicates the inside of the vehicle. shall be denoted by IN. The arrow X indicates the vehicle length direction, the arrow Y indicates the vehicle width direction, and the arrow Z indicates the vehicle height direction.
　本明細書において、「膨張」とは、カーテンエアバッグの内部空間へのガス供給によって当該カーテンエアバッグが膨れて大きくなる態様をいう。また、「膨張展開」とは、予め所定の形態に折り畳まれたカーテンエアバッグが膨張する過程で折り畳まれた状態を解除するように拡張する態様をいう。このときのカーテンエアバッグの動作を、「膨張展開」に代えて、単に「展開」ということもできる。 In this specification, "inflation" refers to a mode in which the curtain airbag expands and becomes larger due to the supply of gas to the interior space of the curtain airbag. Further, "inflating and deploying" refers to a mode in which a curtain airbag that has been folded in a predetermined shape in advance expands so as to release the folded state in the process of inflating. The operation of the curtain airbag at this time can be simply called "deployment" instead of "inflation and deployment".
（実施形態１）
　図１に示されるように、実施形態１の頭部保護用エアバッグ装置（以下、単に「エアバッグ装置」ともいう。）１０１は、車両１に搭載されるものである。一例として、このエアバッグ装置１０１は、車両１の左右上部のルーフサイド部２にインナーパネル３に沿って設けられるように構成されている。 (Embodiment 1)
As shown in FIG. 1 , a head protection airbag device (hereinafter also simply referred to as “airbag device”) 101 of Embodiment 1 is mounted on a vehicle 1 . As an example, the airbag device 101 is configured to be provided along the inner panel 3 on the roof side portions 2 on the left and right upper portions of the vehicle 1 .
　エアバッグ装置１０１は、カーテンエアバッグ（以下、単に「エアバッグ」という。）１０と、エアバッグ１０に膨張展開用のガスを供給するガス供給部２０と、を備えている。
を備え、 The airbag device 101 includes a curtain airbag (hereinafter simply referred to as “airbag”) 10 and a gas supply section 20 that supplies gas for inflation and deployment to the airbag 10 .
with
　エアバッグ１０は、ルーフサイド部２の収容空間２ａに予め折り畳まれた格納状態Ｃ１でカーテン状に膨張展開可能に格納される。このとき、格納状態Ｃ１とされるエアバッグ１０の折り畳みについて、典型的には、ロール状や蛇腹状の折り畳み態様が採用される。 The airbag 10 is stored in the housing space 2a of the roof side portion 2 in a pre-folded storage state C1 so as to be inflatable and deployable like a curtain. At this time, the folded state of the airbag 10, which is in the stored state C1, typically adopts a roll-like or bellows-like folding mode.
　エアバッグ１０は、ガス供給部２０から膨張展開用のガスが供給される結果、最終的に展開完了状態Ｃ３になる。このエアバッグ１０は、その展開完了状態Ｃ３（図１中の二点鎖線を参照）において、車両１の側方窓部６（前席窓部６ａ及び後席窓部６ｂ）の概ね全体をカーテン状に覆う。このとき、展開完了状態Ｃ３のエアバッグ１０は、車幅方向Ｙについてバッグ上端部がルーフサイド部２に重なり合い、且つバッグ下端部が車両１のドアトリム部５の上端部と重なり合うように構成されている。 The airbag 10 is finally in the deployment completion state C3 as a result of the gas for inflation and deployment being supplied from the gas supply section 20 . The airbag 10 substantially entirely covers the side windows 6 (the front window 6a and the rear window 6b) of the vehicle 1 in the fully deployed state C3 (see the two-dot chain line in FIG. 1). cover in shape. At this time, the airbag 10 in the fully deployed state C3 is configured such that the bag upper end overlaps the roof side portion 2 and the bag lower end overlaps the upper end portion of the door trim portion 5 of the vehicle 1 in the vehicle width direction Y. there is
　ここでいう「展開完了状態Ｃ３」とは、エアバッグ１０が膨張により車長方向Ｘと車高方向Ｚの両方向により定まる平面に沿って平面的に展開した状態をいう。この展開完了状態Ｃ３のエアバッグ１０の車幅方向Ｙの側面視形状は、車幅方向Ｙに厚くなることを除いて、折り畳み前の未折状態のエアバッグ１０の車幅方向Ｙの側面視形状に概ね一致する。 The "deployment completion state C3" referred to here refers to a state in which the airbag 10 is deployed in a plane along a plane determined by both the vehicle length direction X and the vehicle height direction Z due to inflation. The side view shape of the airbag 10 in the vehicle width direction Y in the deployment completed state C3 is the same as that of the unfolded airbag 10 in the vehicle width direction Y, except that it is thicker in the vehicle width direction Y. It roughly matches the shape.
　エアバッグ１０は、典型的には、合成繊維を製織した低通性且つ可撓性を有する素材からなるシート状の基布によって構成されている。複数の基布を互いに重ね合わせて縫合や接着等の接合を利用して袋状に成形することによってエアバッグ１０が形成される。 The airbag 10 is typically made of a sheet-like base fabric made of a low-permeability and flexible material woven from synthetic fibers. The airbag 10 is formed by overlapping a plurality of base fabrics and molding them into a bag shape using joining such as stitching or bonding.
　図２に示されるように、エアバッグ１０は、その格納状態Ｃ１においてケース１１に収容されて保持される。ケース１１は、ルーフサイド部２を構成するインナーパネル３に取付けられている。ケース１１は、車室側に開口部１１ａが形成されるような断面形状を有している。このため、ケース１１は、開口部１１ａを通じて車室側からのエアバッグ１０の収容操作を可能とし、或いは開口部１１ａを通じて車室側へのエアバッグ１０の突出動作を可能とするように構成されている。このため、ユーザは開口部１１ａを通じて車室側からケース１１にエアバッグ１０を収容することができる。また、ケース１１に収容されたエアバッグ１０は、展開膨張時に開口部１１ａを通じて車室側へ突出することができる。このとき、ケース１１は、インナーパネル３に取付けられているインナーパネル３側の部材であって、エアバッグ１０の膨張展開時に、後述の上部チャンバー１２の突出部１４と干渉する干渉部材となる。 As shown in FIG. 2, the airbag 10 is accommodated and held in the case 11 in its retracted state C1. The case 11 is attached to the inner panel 3 forming the roof side portion 2 . The case 11 has a cross-sectional shape such that an opening 11a is formed on the compartment side. For this reason, the case 11 is configured so as to allow the airbag 10 to be accommodated from the passenger compartment side through the opening 11a, or to allow the airbag 10 to protrude toward the passenger compartment through the opening 11a. ing. Therefore, the user can store the airbag 10 in the case 11 from the passenger compartment side through the opening 11a. Further, the airbag 10 housed in the case 11 can protrude toward the passenger compartment through the opening 11a when deployed and inflated. At this time, the case 11 is a member on the inner panel 3 side attached to the inner panel 3, and serves as an interference member that interferes with the projecting portion 14 of the upper chamber 12, which will be described later, when the airbag 10 is inflated and deployed.
　エアバッグ１０は、その格納状態Ｃ１において内装材４によって車室側から覆われる。内装材４は、合成樹脂材料からなるルーフヘッドライニングやガーニッシュなどによって構成されている。この内装材４には、このエアバッグ１０の下面を覆うドア部４ａのための薄肉部が設けられているのが好ましい。薄肉部は、内装材４に形成された開裂予定線或いはヒンジ線によって構成されるのが好ましい。これにより、内装材４のドア部４ａが所定荷重を超える荷重を受けたときに薄肉部において車室側に開きやすくなり、エアバッグ１０がルーフサイド部２の収容空間２ａから突出する動作を円滑にすることができる。 The airbag 10 is covered from the passenger compartment side by the interior material 4 in its retracted state C1. The interior material 4 is composed of a roof headlining, a garnish, and the like made of a synthetic resin material. Preferably, the interior material 4 is provided with a thin portion for the door portion 4a covering the lower surface of the airbag 10. As shown in FIG. It is preferable that the thin portion is formed by a split line or a hinge line formed in the interior material 4 . As a result, when the door portion 4a of the interior material 4 receives a load exceeding a predetermined load, the thin portion of the door portion 4a is easily opened toward the passenger compartment, and the operation of projecting the airbag 10 from the accommodation space 2a of the roof side portion 2 is smooth. can be
　図３に示されるように、エアバッグ１０は、前席側チャンバーと後席側チャンバーを含む複数のチャンバーを有する。袋形状のエアバッグ１０の内部空間は、複数の接合線１０ｃを隔ててこれら複数のチャンバーに区画されている。前席側チャンバーは、上部チャンバー１２と下部チャンバー１５によって構成されている。エアバッグ１０は、上部チャンバー１２の容量が下部チャンバー１５の容量を下回るように構成されている。エアバッグ１０は、車長方向Ｘに互いに間隔を隔てて配置された複数のストラップ１７によってルーフサイド部２に連結されている。 As shown in FIG. 3, the airbag 10 has a plurality of chambers including a front seat side chamber and a rear seat side chamber. The internal space of the bag-shaped airbag 10 is partitioned into a plurality of chambers with a plurality of joining lines 10c interposed therebetween. The front seat side chamber is composed of an upper chamber 12 and a lower chamber 15 . The airbag 10 is constructed such that the volume of the upper chamber 12 is less than the volume of the lower chamber 15 . The airbag 10 is connected to the roof side portion 2 by a plurality of straps 17 spaced apart from each other in the longitudinal direction X of the vehicle.
　ガス供給部２０は、エアバッグ１０とともにルーフサイド部２の収容空間２ａに収容されている。このガス供給部２０は、ガス発生器としてのインフレータ２１と、インフレータ２１で発生したガスを分配するためのディフューザー２２と、を有する。 The gas supply section 20 is housed in the housing space 2a of the roof side section 2 together with the airbag 10. This gas supply unit 20 has an inflator 21 as a gas generator and a diffuser 22 for distributing the gas generated by the inflator 21 .
　インフレータ２１は、車両１に設けられているセンサ（図示省略）に閾値を上回る衝撃が加わると作動してガスＧを生成するように構成されている。ディフューザー２２は、インフレータ２１で生成したガスＧを前席側チャンバー（上部チャンバー１２及び下部チャンバー１５）と後席側チャンバーに分配するように構成されている。 The inflator 21 is configured to operate and generate the gas G when a sensor (not shown) provided in the vehicle 1 receives an impact exceeding a threshold. The diffuser 22 is configured to distribute the gas G generated by the inflator 21 to the front chamber (the upper chamber 12 and the lower chamber 15) and the rear chamber.
　ディフューザー２２は、２つのガス導入口２２ａ，２２ｂを有する。このディフューザー２２によれば、ガス導入口２２ａから前席側チャンバーにガスＧが導入され、ガス導入口２２ｂから後席側チャンバーにガスＧが導入される。エアバッグ１０のうちディフューザー２２のガス導入口２２ａに相当する部位は、上部チャンバーにガスＧが導入されるガス導入部１０ｄとなる。 The diffuser 22 has two gas introduction ports 22a and 22b. According to this diffuser 22, the gas G is introduced into the front chamber through the gas introduction port 22a, and the gas G is introduced into the rear chamber through the gas introduction port 22b. A portion of the airbag 10 corresponding to the gas introduction port 22a of the diffuser 22 serves as a gas introduction portion 10d through which the gas G is introduced into the upper chamber.
　上部チャンバー１２は、ガス供給部２０からのガス供給により、ルーフサイド部２のインナーパネル３（図２を参照）に沿って膨張展開するように構成されている。これに対して、下部チャンバー１５は、ガス供給部２０からのガス供給により、上部チャンバー１２の下方で膨張展開するように構成されている。この下部チャンバー１５は、頭部保護領域Ｈの側方で膨張展開する。ここで、頭部保護領域Ｈは、乗員の頭部Ｔの配置及び動きを想定して頭部保護に有効な領域として予め設定されている。このため、下部チャンバー１５が複数のチャンバーのうちの実質的な頭部保護用のチャンバーとなる。 The upper chamber 12 is configured to be inflated and deployed along the inner panel 3 (see FIG. 2) of the roof side section 2 by gas supply from the gas supply section 20 . On the other hand, the lower chamber 15 is configured to be inflated and deployed below the upper chamber 12 by gas supply from the gas supply section 20 . This lower chamber 15 expands and deploys on the side of the head protection area H. As shown in FIG. Here, the head protection area H is set in advance as an area effective for head protection, assuming the arrangement and movement of the occupant's head T. As shown in FIG. Therefore, the lower chamber 15 becomes a substantial head protection chamber among the plurality of chambers.
　上部チャンバー１２は、ガスＧの流通が可能なガス流路１３を有する。このガス流路１３は、全体としてインナーパネル３に沿ってガス流れ方向Ｄ１に直線状に延びている。ディフューザー２２のガス導入口２２ａから上部チャンバー１２のガス流路１３に導入されたガスＧの一部は、このガス流路１３をガス流れ方向Ｄ１に概ね直線的に流れる。 The upper chamber 12 has a gas flow path 13 through which the gas G can flow. The gas flow path 13 extends linearly in the gas flow direction D1 along the inner panel 3 as a whole. Part of the gas G introduced from the gas introduction port 22a of the diffuser 22 into the gas channel 13 of the upper chamber 12 flows through the gas channel 13 substantially linearly in the gas flow direction D1.
　上部チャンバー１２には、膨張展開時にガス流路１３の流路断面形状が車高方向Ｚの上方に部分的に突出するような形状をなす突出部１４が設けられている。このため、上部チャンバー１２が膨張展開するときに、突出部１４はガス流路１３の本流部分から上方に***した瘤形状をなす。このとき、上部チャンバー１２は、ガスＧの充満状態でのガス流路１３の流路断面積について突出部１４が最も大きく突出部１４以外の部位では概ね同様となるように構成されている。このときの突出部１４以外の部位の流路断面は概ね同形状となる。また、上部チャンバー１２は、ガス流路１３の車高方向Ｚの流路幅について突出部１４が最も大きく突出部１４以外の部位では概ね同様となるように構成されている。 The upper chamber 12 is provided with a protruding portion 14 having a cross-sectional shape of the gas channel 13 that partially protrudes upward in the vehicle height direction Z when inflated and deployed. Therefore, when the upper chamber 12 is inflated and deployed, the protruding portion 14 forms a knob-like shape protruding upward from the main flow portion of the gas flow path 13 . At this time, the upper chamber 12 is configured such that the cross-sectional area of the gas flow path 13 in the gas G-filled state is the largest at the projecting portion 14 and substantially the same at the portions other than the projecting portion 14 . At this time, the channel cross section of the portion other than the projecting portion 14 has substantially the same shape. In addition, the upper chamber 12 is configured such that the width of the gas flow path 13 in the vehicle height direction Z is the largest at the protruding portion 14 and substantially the same at the portions other than the protruding portion 14 .
　ディフューザー２２のガス導入口２２ａからエアバッグ１０の内部空間に導入されたガスＧの残部は、下部チャンバー１５のガス流路１６を頭部保護領域Ｈに対応する箇所に向けて前斜め下方のガス流れ方向Ｄ２に流れる。下部チャンバー１５では、更に、ガスＧが下向きのガス流れ方向Ｄ３に流れることによって、下部チャンバー１５にガスＧが充満する。 The remainder of the gas G introduced into the internal space of the airbag 10 from the gas inlet 22a of the diffuser 22 is directed downward and forward through the gas flow path 16 of the lower chamber 15 toward a location corresponding to the head protection region H. It flows in flow direction D2. In the lower chamber 15, the gas G further flows downward in the gas flow direction D3, thereby filling the lower chamber 15 with the gas G. As shown in FIG.
　ここで、図３～図６を参照しながら、エアバッグ１０の膨張展開過程の様子について説明する。 Here, the state of the inflation and deployment process of the airbag 10 will be described with reference to FIGS. 3 to 6. FIG.
　図３に示されるように、インフレータ２１の作動時に生成したガスＧは、ディフューザー２２を通じて格納状態Ｃ１のエアバッグ１０の内部空間に導入される。このとき、エアバッグ１０の上部チャンバー１２には、ガス流路１３を車長方向Ｘの前方に向けてガス流れ方向Ｄ１にガスＧが流れる。そして、ガス流路１３にガスＧが充満することによって、上部チャンバー１２は車長方向Ｘに長尺状に延びた膨張展開状態になり膨張展開を完了する。 As shown in FIG. 3, the gas G generated when the inflator 21 is activated is introduced through the diffuser 22 into the internal space of the airbag 10 in the retracted state C1. At this time, the gas G flows into the upper chamber 12 of the airbag 10 in the gas flow direction D1 with the gas flow path 13 facing forward in the vehicle length direction X. When the gas flow path 13 is filled with the gas G, the upper chamber 12 is inflated and deployed elongated in the vehicle length direction X, thus completing the inflation and deployment.
　一方で、エアバッグ１０の下部チャンバー１５には、ガス流路１６をガス流れ方向Ｄ２，Ｄ３にガスＧが流れる。このとき、下部チャンバー１５は、その容量が上部チャンバー１２の容量を上回るため、上部チャンバー１２が膨張展開を完了した後に膨張展開を完了する。 On the other hand, in the lower chamber 15 of the airbag 10, the gas G flows through the gas flow path 16 in the gas flow directions D2 and D3. At this time, since the capacity of the lower chamber 15 exceeds the capacity of the upper chamber 12, inflation and deployment are completed after the upper chamber 12 completes inflation and deployment.
　図４に示されるように、エアバッグ１０の展開中間状態Ｃ２では、上部チャンバー１２は、膨張展開時に突出部１４がインナーパネル３側の干渉部材としてのケース１１に干渉して上壁部１１ｂを上向きに押圧する。ここで、展開中間状態Ｃ２は、エアバッグ１０が格納状態Ｃ１から展開膨張して展開完了状態Ｃ３に至る前の状態をいう。このとき、ケース１１は、ルーフサイド部２側に固定されているため、上部チャンバー１２の突出部１４はケース１１の上壁部１１ｂとの接触部において下向きの反力Ｆを受ける。このため、上部チャンバー１２は突出部１４において下向きに押し返される。その結果、上部チャンバー１２は、膨張展開時にインナーパネル３側のケース１１との間で生じる下向きの反力Ｆを利用して下部チャンバー１５を押し下げる荷重を高めることができる。 As shown in FIG. 4, in the intermediate state C2 of deployment of the airbag 10, the protrusion 14 of the upper chamber 12 interferes with the case 11 as an interference member on the inner panel 3 side during inflation and deployment, and the upper wall portion 11b is pushed down. Press upwards. Here, the intermediate deployment state C2 is a state before the airbag 10 is deployed and inflated from the stored state C1 and reaches the deployment completed state C3. At this time, since the case 11 is fixed to the side of the roof side portion 2 , the projecting portion 14 of the upper chamber 12 receives a downward reaction force F at the contact portion with the upper wall portion 11 b of the case 11 . As a result, the upper chamber 12 is pushed back downward at the protrusion 14 . As a result, the upper chamber 12 can increase the load pushing down the lower chamber 15 by utilizing the downward reaction force F generated between the upper chamber 12 and the case 11 on the inner panel 3 side during inflation and deployment.
　図５に示されるように、突出部１４の内部空間は、いずれも接合線１０ｃによって構成された上壁１４ａと前壁１４ｂと後壁１４ｃによって区画されている。上壁１４ａは、ガス流れ方向Ｄ１に沿って延びている。前壁１４ｂは、上壁１４ａに連続してガス流れ方向Ｄ１の下流側に設けられており、ガス流れ方向Ｄ１と交差するように延びている。後壁１４ｃは、上壁１４ａに連続してガス流れ方向Ｄ１の上流側に設けられており、ガス流れ方向Ｄ１と交差するように延びている。 As shown in FIG. 5, the internal space of the projecting portion 14 is partitioned by an upper wall 14a, a front wall 14b, and a rear wall 14c, all of which are formed by joining lines 10c. The upper wall 14a extends along the gas flow direction D1. The front wall 14b is provided downstream in the gas flow direction D1 continuously from the upper wall 14a, and extends so as to intersect the gas flow direction D1. The rear wall 14c is provided on the upstream side of the gas flow direction D1 continuously from the upper wall 14a, and extends so as to intersect the gas flow direction D1.
　エアバッグ１０の展開中間状態Ｃ２において、上部チャンバー１２のガス流路１３を流れるガスＧが突出部１４に達したとき、その一部が分岐して突出部１４の凸状の内部空間に流入する。図５では、ガス流れ方向Ｄ１に流れるガスＧの一部が上方に分岐して突出部１４の内部空間に流入する。この内部空間に流入したガスＧは、前壁１４ｂ及び上壁１４ａ及び後壁１４ｃに沿って循環するようなガス流れを形成する。これにより、突出部１４がケース１１の上壁部１１ｂを上向きに押圧する荷重が強まり、突出部１４がケース１１の上壁部１１ｂから受ける下向きの反力Ｆが強まる。 In the intermediate deployment state C2 of the airbag 10, when the gas G flowing through the gas flow path 13 of the upper chamber 12 reaches the projecting portion 14, a portion of the gas G branches and flows into the convex internal space of the projecting portion 14. . In FIG. 5 , part of the gas G flowing in the gas flow direction D<b>1 branches upward and flows into the internal space of the projecting portion 14 . The gas G that has flowed into this internal space forms a gas flow that circulates along the front wall 14b, upper wall 14a and rear wall 14c. As a result, the load by which the projecting portion 14 presses the upper wall portion 11b of the case 11 upward increases, and the downward reaction force F that the projecting portion 14 receives from the upper wall portion 11b of the case 11 increases.
　上部チャンバー１２における突出部１４の配置について、この突出部１４は、上部チャンバー１２の膨張展開時に頭部保護領域Ｈの上方の位置に選択的に配置されるのが好ましい。このとき、突出部１４が頭部保護領域Ｈを通る車高方向Ｚの仮想線上に位置する。この位置は、車長方向Ｘについて上部チャンバー１２にガスＧが導入されるガス導入部１０ｄから頭部保護領域Ｈまでのガス流通範囲Ｒ内に属する位置である。この位置に突出部１４が配置されることによって、突出部１４の車長方向Ｘの大きさを抑えたうえで、上部チャンバー１２が下部チャンバー１５を押し下げる効果をピンポイントで得ることができる。 Regarding the arrangement of the projecting portion 14 in the upper chamber 12, it is preferable that the projecting portion 14 is selectively arranged at a position above the head protection area H when the upper chamber 12 is inflated and deployed. At this time, the protruding portion 14 is positioned on an imaginary line in the vehicle height direction Z that passes through the head protection area H. As shown in FIG. This position is within the gas distribution range R from the gas introduction portion 10d through which the gas G is introduced into the upper chamber 12 to the head protection region H in the vehicle length direction X. As shown in FIG. By arranging the projecting portion 14 at this position, the size of the projecting portion 14 in the vehicle length direction X can be suppressed, and the effect of the upper chamber 12 pushing down the lower chamber 15 can be pinpointed.
　図６に示されるように、エアバッグ１０は、下部チャンバー１５が上部チャンバー１２によって押下げられながら下部チャンバー１５の空間をガスＧが下向きに流れることによって、全体的に下降して展開完了状態Ｃ３になる。展開完了状態Ｃ３のエアバッグ１０は、下部チャンバー１５が頭部保護領域Ｈにおいて前席窓部６ａに当接しながらこの前席窓部６ａを車室側から覆うことによって、乗員の頭部Ｔを保護するための保護面を形成する。このため、下部チャンバー１５は、乗員の頭部Ｔが前席窓部６ａ側に移動したときにこの頭部Ｔを頭部保護領域Ｈにおいて受け止めることができる。 As shown in FIG. 6, the lower chamber 15 is pushed down by the upper chamber 12, and the gas G flows downward in the space of the lower chamber 15, so that the airbag 10 is lowered as a whole to reach a deployment completion state C3. become. The airbag 10 in the deployed state C3 covers the front seat window 6a from the passenger compartment side while the lower chamber 15 contacts the front seat window 6a in the head protection area H, thereby protecting the occupant's head T. Form a protective surface to protect. Therefore, the lower chamber 15 can receive the head T of the occupant in the head protection area H when the head T moves toward the front seat window 6a.
　このとき、エアバッグ１０は、車幅方向Ｙについて上部チャンバー１２の上端部である突出部１４がルーフサイド部２側のケース１１と重なり合い且つ下部チャンバー１５の下端部１５ａが車両１のドアトリム部５と重なり合うように膨張展開する。この場合、展開完了状態Ｃ３のエアバッグ１０は、少なくとも、車高方向Ｚの異なる二箇所（ルーフサイド部２及びドアトリム部５）で車両１に支持されて、車外側に向かう方向の動きが規制される。これにより、下部チャンバー１５が頭部保護領域Ｈにおいて乗員の頭部Ｔを安定して受け止めることが可能になる。 At this time, in the vehicle width direction Y, the protrusion 14 that is the upper end of the upper chamber 12 of the airbag 10 overlaps the case 11 on the side of the roof side portion 2 , and the lower end 15 a of the lower chamber 15 overlaps the door trim portion 5 of the vehicle 1 . Inflate and expand so that it overlaps with. In this case, the airbag 10 in the fully deployed state C3 is supported by the vehicle 1 at least at two different locations in the vehicle height direction Z (the roof side portion 2 and the door trim portion 5), and movement toward the outside of the vehicle is restricted. be done. This allows the lower chamber 15 to stably receive the occupant's head T in the head protection region H.
　特に、上部チャンバー１２の突出部１４は、膨張展開時に下部チャンバー１５を押し下げる機能に加えて、エアバッグ１０の車外側に向かう方向の動きを規制する機能を兼務するように構成されている。本構成によれば、これら２つの機能を別々の要素によって実現する場合に比べて構造を簡素化するのに有効である。 In particular, the protruding portion 14 of the upper chamber 12 is configured to have the function of pushing down the lower chamber 15 during inflation and deployment, as well as the function of restricting the movement of the airbag 10 toward the outside of the vehicle. This configuration is effective in simplifying the structure compared to the case where these two functions are realized by separate elements.
　上述の実施形態１によれば、以下のような作用効果が得られる。 According to the first embodiment described above, the following effects can be obtained.
　上記のエアバッグ装置１０１において、衝撃発生時にガス供給部２０からエアバッグ１０に膨張展開用のガスが供給される。このとき、エアバッグ１０の上部チャンバー１２と下部チャンバー１５がそれぞれ膨張展開する。上部チャンバー１２は、ルーフサイド部２のインナーパネル３に沿って膨張展開する。下部チャンバー１５は、上部チャンバー１２の下方で膨張展開して乗員の頭部Ｔの保護に供される。 In the airbag device 101 described above, gas for inflation and deployment is supplied from the gas supply section 20 to the airbag 10 when an impact occurs. At this time, the upper chamber 12 and the lower chamber 15 of the airbag 10 are inflated and deployed. The upper chamber 12 inflates and deploys along the inner panel 3 of the roof side portion 2 . The lower chamber 15 is inflated and deployed below the upper chamber 12 to protect the head T of the occupant.
　ここで、上部チャンバー１２は、膨張展開時にインナーパネル３側のケース１１との間で生じる下向きの反力Ｆを利用して下部チャンバー１５を押し下げる機能を有する。この機能によれば、上部チャンバー１２が下部チャンバー１５を下向きに付勢する荷重が上昇するため、下部チャンバー１５が頭部保護領域Ｈに向けて展開する展開速度が高くなる。これにより、上部チャンバー１２がケース１１から受ける反力を利用することで下部チャンバー１５を早期に頭部保護領域Ｈで展開させることができる。エアバッグ１０が大型化されるような場合でも、下部チャンバー１５の展開速度が低下するのを抑えるのに有効である。 Here, the upper chamber 12 has the function of pushing down the lower chamber 15 by utilizing the downward reaction force F generated between it and the case 11 on the inner panel 3 side during inflation and deployment. According to this function, the load with which the upper chamber 12 urges the lower chamber 15 downward increases, so the deployment speed at which the lower chamber 15 deploys toward the head protection area H increases. As a result, the lower chamber 15 can be deployed in the head protection area H at an early stage by utilizing the reaction force that the upper chamber 12 receives from the case 11 . Even when the airbag 10 is enlarged, it is effective in suppressing the lowering of the deployment speed of the lower chamber 15 .
　従って、実施形態１によれば、エアバッグ１０を構成する頭部保護用の下部チャンバー１５の展開速度を高めることができるエアバッグ装置１０１を提供することが可能になる。 Therefore, according to Embodiment 1, it is possible to provide the airbag device 101 capable of increasing the deployment speed of the head protection lower chamber 15 constituting the airbag 10 .
　上記のエアバッグ装置１０１によれば、上部チャンバー１２のガス流路１３の流路断面形状を部分的に変更して突出部１４を設けるという簡便な構造変更によって上部チャンバー１２が下部チャンバー１５を強く押し下げる効果を得ることができる。これにより、インフレータ２１側の能力アップ等の高価な構造を採用するような場合に比べて、安価なコストで所望の効果を得ることが可能になる。 According to the above-described airbag device 101, the upper chamber 12 strengthens the lower chamber 15 by a simple structural change in which the cross-sectional shape of the gas passage 13 of the upper chamber 12 is partially changed to provide the projecting portion 14. You can get the pushing effect. As a result, the desired effect can be obtained at a low cost compared to adopting an expensive structure such as an increase in the capacity of the inflator 21 side.
　以下、上述の実施形態１に関連する他の実施形態について図面を参照しつつ説明する。他の実施形態において、実施形態１の要素と同一の要素には同一の符号を付しており、当該同一の要素についての説明は省略する。 Other embodiments related to the first embodiment described above will be described below with reference to the drawings. In other embodiments, the same reference numerals are given to the same elements as those of the first embodiment, and the description of the same elements will be omitted.
（実施形態２）
　図７に示されるように、実施形態２のエアバッグ装置１０２は、上部チャンバー１２における突出部１４Ａの形状及び配置について、実施形態１のエアバッグ装置１０１のものと相違している。 (Embodiment 2)
As shown in FIG. 7, the airbag device 102 of the second embodiment differs from the airbag device 101 of the first embodiment in the shape and arrangement of the projecting portion 14A in the upper chamber 12. As shown in FIG.
　このエアバッグ装置１０２において、突出部１４Ａは、実施形態１の突出部１４と同様に、上部チャンバー１２の膨張展開時にガス流路１３の流路断面形状が車高方向Ｚの上方に部分的に突出するような形状をなす。一方で、この突出部１４Ａは、実施形態１の突出部１４とは異なり、上部チャンバー１２の膨張展開時に、車長方向Ｘについて上部チャンバー１２にガスＧが導入されるガス導入部１０ｄから頭部保護領域Ｈまでのガス流通範囲Ｒの全体にわたって配置されるような形状をなす。このとき、突出部１４Ａの車長方向Ｘの長さは、実施形態１の突出部１４の車長方向Ｘの長さを上回る。上部チャンバー１２のガス流路１３のうちガス流通範囲Ｒに相当する箇所は、ガス流れが相対的に強い領域であり、この箇所に突出部１４Ａを配置すれば、突出部１４Ａがケース１１から受ける下向きの反力Ｆを強めるのに有効である。 In this airbag device 102, similarly to the protrusion 14 of the first embodiment, the cross-sectional shape of the gas passage 13 of the protrusion 14A is partially upward in the vehicle height direction Z when the upper chamber 12 is inflated and deployed. It has a protruding shape. On the other hand, unlike the projecting portion 14 of the first embodiment, the projecting portion 14A is different from the projecting portion 14A in the vehicle length direction X from the gas introduction portion 10d through which the gas G is introduced into the upper chamber 12 when the upper chamber 12 is inflated and deployed. It is shaped such that it is arranged over the entire gas flow range R up to the protection area H. At this time, the length of the projecting portion 14A in the vehicle length direction X exceeds the length of the projecting portion 14 in the vehicle length direction X of the first embodiment. A portion of the gas passage 13 of the upper chamber 12 corresponding to the gas flow range R is a region where the gas flow is relatively strong. It is effective in strengthening the downward reaction force F.
　その他の構成は、実施形態１と同様である。 Other configurations are the same as in the first embodiment.
　実施形態２のエアバッグ装置１０２によれば、実施形態１のエアバッグ装置１０１に比べて、突出部１４Ａの車長方向Ｘの長さを増やすことによって、上部チャンバー１２が突出部１４Ａにおいて下部チャンバー１５から受ける下向きの反力Ｆを強めることが可能になる。このため、下部チャンバー１５が頭部保護領域Ｈに向けて展開する展開速度を更に高めることができる。 According to the airbag device 102 of the second embodiment, compared with the airbag device 101 of the first embodiment, by increasing the length of the projecting portion 14A in the vehicle length direction X, the upper chamber 12 is expanded to the lower chamber at the projecting portion 14A. The downward reaction force F received from 15 can be strengthened. Therefore, the deployment speed at which the lower chamber 15 deploys toward the head protection area H can be further increased.
　その他、実施形態１と同様の作用効果を奏する。 In addition, the same effects as those of the first embodiment are obtained.
（実施形態３）
　図８に示されるように、実施形態３のエアバッグ装置１０３は、上部チャンバー１２が下部チャンバー１５を押し下げるために下向き反力Ｆを受ける構造について、実施形態１のエアバッグ装置１０１のものと相違している。 (Embodiment 3)
As shown in FIG. 8, the airbag device 103 of the third embodiment differs from the airbag device 101 of the first embodiment in the structure in which the upper chamber 12 receives the downward reaction force F to push down the lower chamber 15. is doing.
　このエアバッグ装置１０３では、上部チャンバー１２の突出部１４に相当する部位が省略されており、その代わりに、ケース１１の内壁面のうち突出部１４に相当する部位に上部チャンバー１２に向けて部分的に突出した突出部１１ｃを設けている。これにより、上部チャンバー１２は、膨張展開時にケース１１の突出部１１ｃに干渉することによってこの突出部１１ｃとの接触部において下向きの反力Ｆを受ける。なお、突出部１１ｃは、ケース１１の一部によって構成されてもよいし、或いはケース１１に接合された別部材によって構成されてもよい。 In this airbag device 103, the portion corresponding to the projecting portion 14 of the upper chamber 12 is omitted. A projecting portion 11c is provided, which projects outwardly. As a result, the upper chamber 12 interferes with the protruding portion 11c of the case 11 during inflation and deployment, and receives a downward reaction force F at the contact portion with the protruding portion 11c. The projecting portion 11 c may be configured by a part of the case 11 or may be configured by a separate member joined to the case 11 .
　その他の構成は、実施形態１と同様である。 Other configurations are the same as in the first embodiment.
　実施形態３のエアバッグ装置１０３によれば、実施形態１のエアバッグ装置１０１に比べて、上部チャンバー１２の突出部１４に相当する部位を省略することで、エアバッグ１０の上部チャンバー１２の構造を簡素化することができ、エアバッグ１０の製造コストを下げることができる。 According to the airbag device 103 of Embodiment 3, compared with the airbag device 101 of Embodiment 1, the structure of the upper chamber 12 of the airbag 10 is reduced by omitting the portion corresponding to the projecting portion 14 of the upper chamber 12. can be simplified, and the manufacturing cost of the airbag 10 can be reduced.
　その他、実施形態１と同様の作用効果を奏する。 In addition, the same effects as those of the first embodiment are obtained.
　本開示は、実施例に準拠して記述されたが、本開示は当該実施例や構造に限定されるものではないと理解される。本開示は、様々な変形例や均等範囲内の変形をも包含する。加えて、様々な組み合わせや形態、さらには、それらに一要素のみ、それ以上、あるいはそれ以下、を含む他の組み合わせや形態をも、本開示の範疇や思想範囲に入るものである。 Although the present disclosure has been described with reference to examples, it is understood that the present disclosure is not limited to those examples or structures. The present disclosure also includes various modifications and modifications within the equivalent range. In addition, various combinations and configurations, as well as other combinations and configurations, including single elements, more, or less, are within the scope and spirit of this disclosure.
　上述の実施形態では、上部チャンバー１２は、その膨張展開時に、突出部１４，１４Ａが車長方向Ｘについてガス導入部１０ｄから頭部保護領域Ｈまでのガス流通範囲Ｒ内に配置されるように構成される場合について例示したが、突出部１４，１４Ａが配置される位置はこれに限定されるものではなく、必要に応じて適宜に変更が可能である。 In the above-described embodiment, the upper chamber 12 is arranged such that the protruding portions 14 and 14A are arranged within the gas flow range R from the gas introduction portion 10d to the head protection region H in the vehicle length direction X when the upper chamber 12 is inflated and deployed. Although the case of being configured is illustrated, the positions at which the protruding portions 14 and 14A are arranged are not limited to this, and can be appropriately changed as necessary.
　上述の実施形態では、上部チャンバーの膨張展開時に突出部１４，１４Ａがインナーパネル３側のケース１１に干渉する場合について例示したが、突出部１４，１４Ａが干渉する干渉部材はケース１１に限定されるものではなく、この干渉部材としてインナーパネル３に直接的或いは間接的に取り付けられる種々の部材を採用することができる。 In the above-described embodiment, the case where the protrusions 14 and 14A interfere with the case 11 on the inner panel 3 side when the upper chamber is inflated and deployed has been illustrated, but the interference member with which the protrusions 14 and 14A interfere is limited to the case 11. Instead, various members that are directly or indirectly attached to the inner panel 3 can be employed as this interference member.

Claims (4)

  1. 　車両（１）のルーフサイド部（２）に膨張展開可能に格納されるカーテンエアバッグ（１０）と、
    　上記カーテンエアバッグに膨張展開用のガスを供給するガス供給部（２０）と、
    を備え、
    　上記カーテンエアバッグは、上記ガス供給部からのガス供給により、上記ルーフサイド部のインナーパネル（３）に沿って膨張展開する上部チャンバー（１２）と、上記上部チャンバーの下方で膨張展開する頭部保護用の下部チャンバー（１５）と、を有し、
    　上記上部チャンバーは、膨張展開時に上記インナーパネル側の干渉部材（１１）との間で生じる下向きの反力（Ｆ）を利用して上記下部チャンバーを押し下げるように構成されている、頭部保護用エアバッグ装置（１０１，１０２，１０３）。     a curtain airbag (10) stored in a roof side portion (2) of a vehicle (1) so as to be inflatable and deployable;
    a gas supply unit (20) for supplying gas for inflation and deployment to the curtain airbag;
    with
    The curtain airbag includes an upper chamber (12) that inflates and deploys along the inner panel (3) of the roof side portion and a head portion that inflates and deploys below the upper chamber by gas supply from the gas supply unit. a protective lower chamber (15);
    The upper chamber is configured to push down the lower chamber by utilizing a downward reaction force (F) generated between the interference member (11) on the inner panel side when inflated and deployed. An airbag device (101, 102, 103).
  2. 　上記上部チャンバーには、膨張展開時に上記インナーパネルに沿って延びるガス流路（１３）の流路断面形状が車高方向（Ｚ）の上方に部分的に突出するような形状をなす突出部（１４，１４Ａ）が設けられており、
    　上記上部チャンバーは、膨張展開時に上記突出部が上記干渉部材を上向きに押圧することによって上記干渉部材から上記反力を受ける、請求項１に記載の頭部保護用エアバッグ装置。     In the upper chamber, a protruding portion ( 14, 14A) are provided,
    2. The head protection airbag device according to claim 1, wherein the upper chamber receives the reaction force from the interference member when the protrusion presses the interference member upward during inflation and deployment.
  3. 　上記突出部は、上記上部チャンバーの膨張展開時に、車長方向（Ｘ）について上記上部チャンバーにガス（Ｇ）が導入されるガス導入部（１０ｄ）から頭部保護領域（Ｈ）までのガス流通範囲（Ｒ）内に配置される、請求項２に記載の頭部保護用エアバッグ装置。 When the upper chamber is inflated and deployed, the protruding portion allows gas to flow from a gas introduction portion (10d) through which gas (G) is introduced into the upper chamber in the vehicle length direction (X) to the head protection area (H). 3. A head protection airbag device according to claim 2, located within the range (R).
  4. 　上記カーテンエアバッグは、車幅方向（Ｙ）について上記上部チャンバーの上記突出部が上記干渉部材と重なり合い且つ上記下部チャンバーの下端部（１５ａ）が上記車両のドアトリム部（５）と重なり合うように膨張展開する、請求項２または３に記載の頭部保護用エアバッグ装置。 The curtain airbag is inflated such that the projecting portion of the upper chamber overlaps the interference member and the lower end portion (15a) of the lower chamber overlaps the door trim portion (5) of the vehicle in the vehicle width direction (Y). 4. The head protection airbag device according to claim 2 or 3, which is deployed.
PCT/JP2021/016609 2021-04-26 2021-04-26 Head-protecting airbag device WO2022230010A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/016609 WO2022230010A1 (en) 2021-04-26 2021-04-26 Head-protecting airbag device

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Application Number Priority Date Filing Date Title
PCT/JP2021/016609 WO2022230010A1 (en) 2021-04-26 2021-04-26 Head-protecting airbag device

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WO2022230010A1 true WO2022230010A1 (en) 2022-11-03

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006117112A (en) * 2004-10-21 2006-05-11 Toyoda Gosei Co Ltd Head protective airbag
JP2006213221A (en) * 2005-02-04 2006-08-17 Nippon Plast Co Ltd Airbag device
WO2007060874A1 (en) * 2005-11-25 2007-05-31 Autoliv Development Ab Curtain airbag for vehicle
JP2008260425A (en) * 2007-04-12 2008-10-30 Toyota Motor Corp Curtain airbag device
JP2020001457A (en) * 2018-06-25 2020-01-09 豊田合成株式会社 Head protective airbag device
JP2021041862A (en) * 2019-09-12 2021-03-18 トヨタ車体株式会社 Curtain shield air bag device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006117112A (en) * 2004-10-21 2006-05-11 Toyoda Gosei Co Ltd Head protective airbag
JP2006213221A (en) * 2005-02-04 2006-08-17 Nippon Plast Co Ltd Airbag device
WO2007060874A1 (en) * 2005-11-25 2007-05-31 Autoliv Development Ab Curtain airbag for vehicle
JP2008260425A (en) * 2007-04-12 2008-10-30 Toyota Motor Corp Curtain airbag device
JP2020001457A (en) * 2018-06-25 2020-01-09 豊田合成株式会社 Head protective airbag device
JP2021041862A (en) * 2019-09-12 2021-03-18 トヨタ車体株式会社 Curtain shield air bag device

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