WO2013035648A1 - Airbag device - Google Patents

Airbag device Download PDF

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Publication number
WO2013035648A1
WO2013035648A1 PCT/JP2012/072240 JP2012072240W WO2013035648A1 WO 2013035648 A1 WO2013035648 A1 WO 2013035648A1 JP 2012072240 W JP2012072240 W JP 2012072240W WO 2013035648 A1 WO2013035648 A1 WO 2013035648A1
Authority
WO
WIPO (PCT)
Prior art keywords
airbag
assist grip
gas
proximity
air chambers
Prior art date
Application number
PCT/JP2012/072240
Other languages
French (fr)
Japanese (ja)
Inventor
昭大 舞田
小西　修平
智樹 橋爪
Original Assignee
芦森工業株式会社
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.)
Filing date
Publication date
Application filed by 芦森工業株式会社 filed Critical 芦森工業株式会社
Publication of WO2013035648A1 publication Critical patent/WO2013035648A1/en

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Classifications

    • 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
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N3/00—Arrangements or adaptations of other passenger fittings, not otherwise provided for
    • B60N3/02—Arrangements or adaptations of other passenger fittings, not otherwise provided for of hand grips or straps
    • B60N3/026—Arrangements or adaptations of other passenger fittings, not otherwise provided for of hand grips or straps characterised by the fixing means
    • 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 invention relates to an airbag device that inflates and deploys an airbag in a passenger compartment and protects an occupant with the airbag.
  • an airbag device for a side wall equipped with an airbag In order to protect occupants in the event of a vehicle emergency or collision, an airbag device for a side wall equipped with an airbag is used. In a folded state, the airbag is attached along the upper part of the passenger compartment to which an assist grip for assisting the occupant is attached, and is disposed close to the assist grip. The airbag device inflates and deploys the airbag in a curtain shape. The occupant is received and protected by the airbag, but the assist grip may be damaged by the airbag that is inflated and deployed.
  • FIG. 6 is a cross-sectional view showing an example of a conventional airbag device and an assist grip.
  • FIG. 6A is a view before the airbag is inflated.
  • FIG. 6B is a view after the airbag is inflated.
  • the folded airbag 101 is attached to the vehicle body 99 in the headlining 92A.
  • a fixing member 88 fixed to the vehicle body 99 is disposed in the headlining 92A.
  • the assist grip 80 includes an attachment portion 81 attached to the vehicle body 99 and a grip portion 82 that is gripped by the occupant.
  • the attachment portion 81 is inserted into the insertion hole 92B of the headlining 92A and attached to the fixing member 88, whereby the assist grip 80 is attached to the vehicle body 99 at a position close to the airbag 101.
  • the airbag 101 When the airbag 101 is inflated and deployed, as shown in FIG. 6B, the airbag 101 pushes and opens the headlining 92A and deploys in the vehicle interior S.
  • the head lining 92A is greatly deformed by being pushed by the inflating airbag 101.
  • the attachment portion 81 of the assist grip 80 is deformed by the force received from the headlining 92A. As a result, the attachment portion 81 may be greatly damaged.
  • the assist grip 80 may be damaged as the airbag 101 is inflated and deployed.
  • the airbag apparatus which prevented the assist grip receiving a big damage conventionally is known (refer patent document 1).
  • the connection port portion to which the inflator is connected is disposed in the vicinity of the assist grip. Further, the upper end in the airbag is shifted downward in the vicinity of the assist grip, and the gas is diverted downward in the vicinity of the assist grip, thereby preventing the assist grip from being damaged greatly.
  • the upper portion of the airbag is first inflated in the vicinity of the assist grip. Further, since the upper part of the airbag is quickly and greatly inflated in the headlining, the upper part of the inflating airbag may press the assist grip, and the assist grip may be damaged. The upper part of the airbag may greatly deform the headlining, and the assist grip may be damaged. Therefore, from the viewpoint of preventing breakage of the assist grip, it is required to reduce the damage received by the assist grip.
  • the present invention has been made in view of the above-described conventional problems, and an object of the present invention is to reduce damage received by the assist grip and prevent breakage of the assist grip when the airbag adjacent to the assist grip is inflated and deployed. That is.
  • the present invention relates to an airbag device mounted on a vehicle in which an assist grip mounting portion is attached to an upper part of a vehicle interior, and includes a proximity air chamber that inflates at a position close to the assist grip, and an upper part of the vehicle interior. And an inflator that generates gas to inflate and deploy the airbag downward, and the proximity air chamber has a gas inlet at the lower end of the proximity air chamber,
  • This is an airbag device that inflates when gas flows in only from the gas inlet.
  • the assist grip it is possible to reduce damage to the assist grip when the airbag adjacent to the assist grip is inflated and deployed. Further, the assist grip can be prevented from being damaged.
  • FIG. 2 is a cross-sectional view of the airbag and the vehicle as viewed in the direction of arrows X1-X1 in FIG.
  • FIG. 3 is a cross-sectional view of the airbag and the vehicle as viewed in the direction of arrows X2-X2 in FIG. It is a figure which shows the airbag expanded on the plane. It is a figure which shows the airbag expanded and deployed in the vehicle. It is sectional drawing which shows the example of the conventional airbag apparatus and an assist grip.
  • the airbag apparatus is a curtain airbag apparatus (hereinafter simply referred to as an airbag apparatus) that deploys an airbag in a curtain shape in a vehicle.
  • the airbag device is mounted on a vehicle and receives and protects an occupant with an airbag that is inflated and deployed.
  • FIG. 1 is a view showing an airbag apparatus according to the present embodiment.
  • the airbag apparatus 1 mounted in the vehicle 90 is shown as viewed from the passenger compartment.
  • the side wall 91 and the airbag device 1 of the vehicle 90 are schematically shown as viewed from the width direction of the vehicle 90 with the rear side of the vehicle 90 omitted.
  • the airbag device 1 is shown through the inner surface of the vehicle 90.
  • the front and rear in the vehicle 90 are simply referred to as front and rear
  • the front-rear direction in the vehicle 90 is simply referred to as front-rear direction.
  • the upper and lower portions in the vehicle 90 are simply referred to as upper and lower portions
  • the vertical direction in the vehicle 90 is simply referred to as the vertical direction.
  • the vehicle 90 has an upper roof rail 92, a front front pillar (A pillar) 93, a center pillar (B pillar) 94, and a rear rear pillar (C pillar) (see FIG. Not shown). Further, the vehicle 90 includes a front door 95, a rear door 96, and windows 97 and 98 of the doors 95 and 96 on the side wall 91. Within the side wall 91, the glass of the windows 97 and 98 opens and closes. A front pillar trim 93A and a part of the head lining 92A are attached to the side wall 91. The front pillar trim 93 ⁇ / b> A is provided on the front pillar 93. The headlining 92A covers the roof (not shown) and the roof rail 92.
  • the vehicle 90 includes an assist grip 80 (indicated by a two-dot chain line in FIG. 1) disposed in the vehicle interior.
  • the attachment part 81 of the assist grip 80 is attached to the upper part of the vehicle interior.
  • the assist grip 80 is provided above the front door 95 and above the side wall 91.
  • the attachment portion 81 is attached to the upper portion (roof rail 92) of the side wall 91.
  • the airbag device 1 includes an airbag (curtain airbag) 10 and a tubular inflator 2.
  • the airbag 10 is folded and attached to the vehicle 90 so as to be inflated and deployed. At that time, for example, the airbag 10 is folded in a bellows shape from a lower edge (referred to as a lower edge) toward an upper edge (referred to as an upper edge).
  • the airbag 10 is rolled and folded from the lower edge portion toward the upper edge portion and wound on the side wall 91 side.
  • the airbag 10 is folded by a composite fold combining a bellows-like fold and a roll fold. By these folding, the airbag 10 is deployed along the side wall 91 (windows 97 and 98) when the airbag apparatus 1 is operated.
  • the airbag 10 is inflated and deployed between the occupant and the side wall 91.
  • the airbag 10 is disposed on the upper portion of the side wall 91 in the passenger compartment in a state where the airbag 10 is folded into an elongated shape.
  • the airbag 10 is attached to the roof rail 92 along the front-rear direction.
  • the airbag 10 is disposed from the rear pillar to the front pillar 93.
  • the folded airbag 10 is disposed in the front pillar trim 93A and the headlining 92A.
  • the airbag 10 is fixed to the vehicle body 99 by fixing means (not shown).
  • the front pillar trim 93 ⁇ / b> A and the head lining 92 ⁇ / b> A are attached to the vehicle body 99 and cover the airbag 10.
  • the front portion 11 of the airbag 10 is attached to the vehicle body 99 in the front pillar trim 93A.
  • the folded airbag 10 has a portion 12 that is disposed in the vicinity of the assist grip 80. A part of the airbag 10 is disposed along the assist grip 80.
  • the assist grip 80 and the attachment portion 81 are attached to the vehicle body 99 in the vicinity of the folded airbag 10.
  • the inflator 2 is a cylinder type gas generator and is inserted into the airbag 10 to generate gas in the airbag 10.
  • the inflator 2 has a plurality of gas ejection openings 2 ⁇ / b> A at one end in the longitudinal direction, is disposed above the center pillar 94, and is attached to the roof rail 92.
  • the inflator 2 is fixed to the vehicle body 99 in the headlining 92A by a fixing means (not shown).
  • the inflator 2 In the event of a vehicle emergency or impact detection, the inflator 2 generates gas from the plurality of jet outlets 2A and supplies the gas to the airbag 10. With this gas, the airbag 10 is inflated and deployed downward from the top of the side wall 91.
  • the airbag 10 is inflated and deployed in a curtain shape along the side wall 91, and a part of the airbag 10 is deployed downward from a position near the assist grip 80.
  • FIG. 2 is a cross-sectional view of the airbag 10 and the vehicle 90 as seen in the direction of arrows X1-X1 in FIG.
  • the assist grip 80 is shown in a cross-sectional view including the attachment portion 81.
  • FIG. 3 is a cross-sectional view of the airbag 10 and the vehicle 90 as seen in the direction of arrows X2-X2 in FIG.
  • the airbag 10 is indicated by a dotted line.
  • the assist grip 80 has a pair of attachment portions 81 and a grip portion 82 that is held by a passenger.
  • the pair of attachment portions 81 are formed at the ends of the grip portion 82 and project from the grip portion 82 in the same direction.
  • An annular protrusion 81 ⁇ / b> A is formed at the tip of the attachment portion 81.
  • the vehicle 90 includes a pair of fixing members 88 fixed to the vehicle body 99 (roof rail 92).
  • the fixing member 88 is a bracket to which the assist grip 80 is attached, and is disposed in the headlining 92A.
  • the attachment portion 81 of the assist grip 80 is inserted into the insertion hole 92B of the headlining 92A and pushed into the attachment hole 89 of the fixing member 88.
  • the protrusion 81 ⁇ / b> A of the attachment portion 81 is pushed into the attachment hole 89 and is fixed to the fixing member 88, whereby the pair of attachment portions 81 are attached to the pair of fixing members 88.
  • the assist grip 80 is attached to the vehicle body 99 at a position close to the folded airbag 10.
  • the folded airbag 10 is disposed in the headlining 92A at the position where the assist grip 80 is attached. A part of the airbag 10 is close to the lower side or the side of the assist grip 80 and the fixing member 88. At the time of inflation and deployment, the airbag 10 pushes the front pillar trim 93 ⁇ / b> A and the headlining 92 ⁇ / b> A open and deploys in the vehicle interior S. At the periphery of the assist grip 80, the airbag 10 is deployed in the passenger compartment S with the headlining 92A deformed downward.
  • FIG. 4 is a view showing the airbag 10 spread on a plane.
  • the gas flow in the airbag 10 is indicated by arrows.
  • the assist grip 80 is shown with the dashed-two dotted line.
  • the airbag 10 is a bag body that is long in the front-rear direction, and is manufactured, for example, from a base fabric made of a cloth coated with a resin.
  • the airbag 10 includes a front base fabric (front panel) 13 on the passenger side and a back base fabric (back panel) 14 on the side wall 91 side.
  • the airbag 10 includes a connecting belt 20, a plurality (six in FIG. 4) of fixed cloths 21 to 26, and a cylindrical gas supply unit 27.
  • Inflator 2 (not shown in FIG. 4) is inserted into gas supply unit 27.
  • the front end of the airbag 10 is connected to the front pillar 93 by the connecting belt 20.
  • the plurality of fixed fabrics 21 to 26 are integrally formed on the upper edge portion of the airbag 10.
  • the connecting belt 20 and the fixing cloths 21 to 26 are fixed to the front pillar 93 and the roof rail 92 by fixing means (not shown) made of bolts or the like.
  • the airbag 10 is attached to the vehicle body 99 by fixed fabrics 21 to 26.
  • the front base fabric 13 and the back base fabric 14 are formed in the same shape, overlapped, and joined by the outer edge joint portion 15.
  • the base fabrics 13 and 14 are arranged to face each other and form an inflating portion 30 between them.
  • the inflatable portion 30 is defined by the outer edge joint portion 15, is formed between the facing fabrics (base fabrics 13 and 14) of the airbag 10, and is inflated by the gas generated by the inflator 2.
  • the outer edge joint portion 15 defines the outer edge shape of the inflating portion 30.
  • the base fabrics 13 and 14 are joined at the outer edge joint portion 15 by sewing and adhesion. That is, the base fabrics 13 and 14 are sewn one or more times along the outer edge joint portion 15, and the sewn portions are sealed with an adhesive. Thereby, the base fabrics 13 and 14 are joined in an airtight manner.
  • a front inflating portion 31, a rear inflating portion 32, and a connected inflating portion 33 are formed by the outer edge joint portion 15.
  • the inflating parts 31 to 33 constitute the inflating part 30 of the airbag 10 as a whole.
  • the front inflating portion 31 is disposed forward in the airbag 10 and inflates at the side of the window 97 of the front door 95 and the center pillar 94 to mainly receive the front seat occupant.
  • the rear inflating portion 32 is disposed rearward in the airbag 10 and inflates above the rear door 96 to mainly receive the rear seat occupant.
  • the connection expansion part 33 connects the front expansion part 31 and the rear expansion part 32.
  • a non-expandable portion 34 is formed between the three expandable portions 31 to 33, and the non-expandable portion 34 is provided outside the expandable portion 30.
  • the gas supply unit 27 is an opening for supplying gas into the airbag 10, is formed in the middle of the airbag 10 in the front-rear direction, and opens at the rear end of the front inflating unit 31.
  • the base fabrics 13 and 14 protrude obliquely upward from the upper edge of the airbag 10 in the gas supply unit 27.
  • the edges of the base fabrics 13 and 14 are joined continuously from the outer edge joint 15 except for the insertion port 27A at the tip.
  • the gas supply part 27 is formed in the cylinder shape which both ends opened, and is provided in the upper edge part of the airbag 10 integrally.
  • the inside of the gas supply unit 27 is connected to the outside of the airbag 10 through an insertion port 27A at one end and is connected to the inside of the inflating unit 30 at the other end.
  • the inflator 2 is inserted into the gas supply unit 27 through the insertion port 27A and disposed in the airbag 10, and is inserted into the gas supply unit 27 provided with, for example, a diffuser that rectifies the gas.
  • the gas supply unit 27 is fastened with a band (not shown) and fixed to the inflator 2 in an airtight manner.
  • the inflator 2 generates gas in the gas supply unit 27.
  • the gas supply unit 27 supplies the gas generated by the inflator 2 into the airbag 10.
  • the gas is supplied from the gas supply unit 27 to the inflating unit 30 of the airbag 10, supplied to the front inflating unit 31, and supplied from the connected inflating unit 33 to the rear inflating unit 32. Thereby, the airbag 10 is inflated and deployed.
  • the airbag 10 has a plurality of internal joint portions (first to fourth internal joint portions 16 to 19) located in the outer edge joint portion 15 (inflatable portion 30).
  • the internal joint portions 16 to 19 are joint portions in which the opposing base fabrics 13 and 14 are joined within the inflatable portion 30.
  • the base fabrics 13 and 14 are joined at the inner joint portions 16 to 19 in the same manner as the outer edge joint portion 15.
  • the inner joint parts 16 to 19 are formed in the inflatable part 30 so as to extend from the outer edge joint part 15 into the inflatable part 30, respectively, and their tips are joined in an annular shape in the inflatable part 30.
  • the annular portions 16A to 19A of the inner joint portions 16 to 19 are formed apart from the outer edge joint portion 15.
  • the plurality of internal joints 16 to 19 are arranged apart from each other in the front-rear direction, and form a gas circulation part and an air chamber in the expansion part 30. That is, the internal joint portions 16 to 19 are partition joint portions that partition the inflatable portion 30, and join the cloths (base fabrics 13 and 14) facing the airbag 10 to partition the inflatable portion 30.
  • the internal joint portions 16 to 19 form first to fifth air chambers 35 to 39 in the expansion portion 30.
  • First to third air chambers 35 to 37 are formed in the front expansion portion 31 by the first to third internal joint portions 16 to 18.
  • the first to third air chambers 35 to 37 are arranged side by side in the front-rear direction. In the air chambers 35 to 37, the upper part and the side part are closed, and only the lower part is open. The gas flows into the first to third air chambers 35 to 37 only from below.
  • the first to third air chambers 35 to 37 are formed in the airbag 10 from the upper end portion to the middle portion in the vertical direction, and the first air chamber 35 is provided in the forefront portion in the airbag 10. It is done.
  • the first air chamber 35 is disposed in the front pillar trim 93 ⁇ / b> A when the airbag 10 is attached to the vehicle 90.
  • the first air chamber 35 is deployed from the front pillar trim 93 ⁇ / b> A into the vehicle compartment S when the airbag 10 is inflated and deployed.
  • the second and third air chambers 36 and 37 are provided behind the first air chamber 35, and are disposed in the headlining 92A when the airbag 10 is attached to the vehicle 90, so that the airbag 10 is inflated and deployed. Occasionally, it develops from the headlining 92A into the passenger compartment S.
  • the first to third air chambers 35 to 37 are close air chambers 40A to 40C that expand at positions close to the assist grip 80.
  • the proximity air chambers 40A to 40C have gas inlets 41A to 41C.
  • the gas inlets 41A to 41C are formed of non-joined portions of the airbag 10 provided at the lower ends of the proximity air chambers 40A to 40C, and the airbags are opened so that only one gas inlet 41A to 41C is opened. 10 inflatable portions 30 are formed.
  • the outer edges of the adjacent air chambers 40A to 40C other than the gas inlet ports 41A to 41C are closed.
  • the gas inlets 41A to 41C allow gas to flow into the adjacent air chambers 40A to 40C from below.
  • the proximity air chambers 40A to 40C expand when gas flows in only from the gas inlet ports 41A to 41C.
  • the airbag 10 has a plurality (three in this case) of proximity air chambers 40A to 40C disposed in the inflating portion 30 in the vicinity of the assist grip 80.
  • the proximity air chambers 40A to 40C are provided in the proximity portion 28 close to the assist grip 80 of the airbag 10 that is inflated and deployed.
  • the proximity portion 28 of the airbag 10 includes proximity air chambers 40A to 40C.
  • the portion (proximity expansion portion) of the expansion portion 30 that is close to the assist grip 80 is also composed of the proximity air chambers 40A to 40C.
  • the plurality of proximity air chambers 40A to 40C are disposed in proximity to the plurality of attachment portions 81 of the assist grip 80.
  • One proximity air chamber 40C is adjacent to one attachment portion 81 (attachment portion 81 on the inflator 2 side), and a plurality (two in this case) of proximity air chambers 40A and 40B are adjacent to the other attachment portion 81. Proximity.
  • the first and second internal joint portions 16 and 17 form the proximity air chambers 40A to 40C and are disposed in proximity to the assist grip 80.
  • the upper end portion of the first internal joint portion 16 is formed at a position close to the other mounting portion 81 described above.
  • An upper end portion of the second internal joint portion 17 is formed at a position between the two attachment portions 81.
  • the airbag 10 includes a plurality of proximity air chambers 40A and 40B disposed in the vicinity of one mounting portion 81 and the first internal joint portion 16 disposed in the vicinity of the mounting portion 81. .
  • the intermediate expansion part 42 and the flow part 43 are formed in the front expansion part 31.
  • the intermediate inflating part 42 is an air chamber that inflates between the gas supply part 27 and the circulation part 43, and is arranged at the center part in the front-rear direction of the airbag 10.
  • the intermediate expansion portion 42 is formed from the gas supply portion 27 downward by the third internal joint portion 18 at the rear end of the front expansion portion 31.
  • the circulation part 43 is a gas passage provided below the proximity air chambers 40A to 40C, and is provided at the lower end in the airbag 10.
  • the circulation part 43 is located between the proximity air chambers 40A to 40C and the outer edge joint part 15, and is formed along the lower edge part of the airbag 10.
  • the lower part (gas inlets 41A to 41C) of ⁇ 40C is communicated.
  • the gas flows from the intermediate expansion portion 42 to the proximity air chambers 40A to 40C through the flow portion 43.
  • the circulation part 43 circulates the gas along the lower edge of the airbag 10 to the plurality of gas inflow ports 41A to 41C.
  • the gas flows from the circulation part 43 into the gas inlets 41A to 41C of the proximity air chambers 40A to 40C.
  • the proximity air chambers 40A to 40C are expanded above the circulation part 43 by only the gas flowing in from the circulation part 43.
  • the gas generated by the inflator 2 is supplied from the gas supply unit 27 to the intermediate expansion unit 42.
  • the intermediate inflating part 42 starts to inflate first.
  • the gas flows from the intermediate expansion part 42 to the circulation part 43.
  • the circulation part 43 expands from the intermediate expansion part 42 toward the first air chamber 35.
  • the gas flows into the adjacent air chambers 40C and 40B (the third and second air chambers 37 and 36) while passing through the circulation part 43. Further, the gas flows through the circulation part 43 and flows into the close air chamber 40A (first air chamber 35).
  • the near-air chambers 40A to 40C start to expand following the flow part 43, expand in order with the expansion of the flow part 43, and expand at different timings from the rear to the front.
  • 4th and 5th air chambers 38 and 39 are formed in the rear inflating portion 32 by the fourth internal joint portion 19.
  • the gas generated by the inflator 2 passes through the connected expansion portion 33 and the fourth air chamber 38 and flows into the fifth air chamber 39 from the lower part.
  • the fourth and fifth air chambers 38 and 39 expand in order in the rear expansion portion 32.
  • the air bag device 1 operates the inflator 2 when it receives an operation signal after being mounted on the vehicle 90.
  • the inflator 2 generates gas and supplies the gas to the inflating unit 30 to inflate and deploy the airbag 10.
  • the airbag 10 is deployed in a curtain shape while eliminating the folded shape.
  • the airbag 10 is inflated and deployed between the occupant and the side wall 91, receives the occupant in the front seat and the rear seat, and protects the occupant's head around the head.
  • FIG. 5 is a view showing the airbag 10 inflated and deployed in the vehicle 90.
  • FIG. 5 shows the side wall 91 of the vehicle 90 and the airbag device 1 corresponding to FIG.
  • the assist grip 80 is schematically shown by a two-dot chain line.
  • the airbag 10 is inflated and deployed along the side wall 91 so as to cover the side wall 91.
  • the airbag 10 is deployed to the positions of the doors 95 and 96 and closes the windows 97 and 98.
  • the front inflating portion 31 of the airbag 10 is inflated and deployed in an area from the front pillar 93 to the center pillar 94 (an area in front of the side wall 91).
  • the intermediate inflating portion 42 first expands and expands in the passenger compartment S.
  • the intermediate expansion part 42 develops from the upper side to the lower side.
  • the airbag 10 is pulled downward by the deploying intermediate inflatable portion 42, whereby the intermediate portion of the airbag 10 including the intermediate inflating portion 42 is pulled out from the headlining 92 ⁇ / b> A and deployed in the vehicle interior S.
  • the proximity air chambers 40A to 40C gradually expand into the vehicle interior S due to the pulling of the intermediate expansion portion.
  • the flow part 43 starts to expand by the gas flowing in from the intermediate expansion part 42.
  • the gas in the circulation part 43 flows into the adjacent air chambers 40A to 40C from the gas inlets 41A to 41C.
  • the gas inlets 41A to 41C are provided at the lower ends of the proximity air chambers 40A to 40C.
  • the proximity air chambers 40A to 40C are expanded from below to above by the gas flowing in from below. After the gas reaches the lower side in the airbag 10 and a part of the airbag 10 is drawn into the vehicle compartment S, expansion of the proximity air chambers 40A to 40C starts.
  • the gas flows through the gas inflow ports 41A to 41C and flows into the adjacent air chambers 40A to 40C while inflating each part of the airbag 10. Further, the inflow of gas into the proximity air chambers 40A to 40C is suppressed until the gas inflow ports 41A to 41C are drawn into the passenger compartment S and deployed.
  • the proximity air chambers 40A to 40C start inflating with a delay in the airbag 10.
  • the proximity air chambers 40A to 40C are pulled out from the head lining 92A in a thin state, and are deployed in the vehicle interior S without largely opening the head lining 92A.
  • the proximity air chambers 40A to 40C start to expand from a position (downward) away from the assist grip 80. Further, since the gas momentum decreases while flowing in the proximity air chambers 40A to 40C, in the vicinity of the assist grip 80, the expansion speed of the proximity air chambers 40A to 40C becomes slow. As a result, the airbag 10 is restrained from being inflated quickly and greatly at a position close to the assist grip 80. The airbag 10 is inflated without strongly or directly interfering with (or colliding with) the assist grip 80, thereby preventing the assist grip 80 from being pushed directly or indirectly on the airbag 10. Further, the airbag 10 is prevented from applying an impact to the assist grip 80, and damage to the assist grip 80 is also suppressed.
  • the airbag 10 when the airbag 10 is inflated and deployed, damage to the assist grip 80 can be reduced, damage to the assist grip 80 can be prevented, and the assist grip 80 can be taken from the vehicle body 99. Can also be prevented.
  • the proximity air chambers 40A to 40C close to the attachment portion 81 of the assist grip 80, the attachment portion 81 that is easily damaged can be protected. As a result, damage to the assist grip 80 can be prevented more reliably.
  • the airbag 10 and the proximity air chambers 40A to 40C are rapidly deployed in the vehicle interior S by the intermediate inflating portion 42. Thereby, expansion of the proximity air chambers 40A to 40C can be suppressed at a position close to the assist grip 80.
  • the deformation of the headlining 92A is also smaller. Due to the intermediate expansion part 42 and the flow part 43, the gas reaches the gas inlets 41A to 41C later. Further, in the vicinity of the assist grip 80, the gas momentum is further reduced and the expansion speed of the proximity air chambers 40A to 40C is further decreased. Therefore, damage to the assist grip 80 can be reliably prevented.
  • the proximity air chambers 40A to 40C before being inflated are strongly pulled by the lower part of the airbag 10 that has been inflated first.
  • the proximity air chambers 40A to 40C are deployed in the passenger compartment S more quickly.
  • the inflated airbag 10 can be thinned by the internal joints 16 and 17 close to the assist grip 80. Since the thickness of the airbag 10 decreases at a position close to the assist grip 80, damage to the assist grip 80 can be further reduced. Since the first internal joint portion 16 is disposed in the vicinity of the attachment portion 81 of the assist grip 80, the attachment portion 81 can be protected, so that the assist grip 80 can be effectively prevented from being damaged.
  • One or two proximity air chambers may be arranged in proximity to the assist grip 80.
  • Four or more close air chambers may be arranged in close proximity to the assist grip 80.
  • a plurality of proximity air chambers may be brought close to the plurality of attachment portions 81 of the assist grip 80, respectively.
  • the airbag 10 may be formed by joining the base fabrics 13 and 14 only by sewing at the outer edge joint portion 15.
  • the airbag 10 may be formed of jacquard weave.
  • the inflatable portion 30 is formed between the jacquard woven fabrics of the airbag 10.
  • the fabrics facing each other of the airbag 10 form an inflatable portion 30 therebetween.
  • a close air chamber is formed in the inflatable portion 30 by the internal joint portion where the opposing fabrics are joined.

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

Abstract

An airbag device is configured so that damage to an assist grip during the inflation and expansion of the airbag is reduced to prevent the breakage of the assist grip. An airbag device (1) is installed in a vehicle (90) configured in such a manner that a mounting section (81) for mounting an assist grip (80) thereon is mounted in the upper part of the vehicle interior. The airbag device (1) is provided with an airbag (10) and an inflator (2). The airbag (10) has adjacent gas chambers (40A-40C) inflated at positions close to the assist grip (80) and is disposed in the upper part of the vehicle interior. The inflator (2) generates gas and inflates and expands downward the airbag (10). The adjacent gas chambers (40A-40C) have gas inflow openings (41A-41C) located at the lower ends of the adjacent gas chambers (40A-40C), and gas flows into the adjacent gas chambers (40A-40C) only from the gas inflow openings (41A-41C) and inflates the adjacent gas chambers (40A-40C).

Description

エアバッグ装置Airbag device
　本発明は、車室内でエアバッグを膨張展開させて、エアバッグにより乗員を保護するエアバッグ装置に関する。 The present invention relates to an airbag device that inflates and deploys an airbag in a passenger compartment and protects an occupant with the airbag.
　車両の緊急時や衝突時に乗員を保護するため、エアバッグを備えた側壁用のエアバッグ装置が使用されている。エアバッグは、折り畳まれた状態で、乗員を補助するためのアシストグリップが取り付けられた車室内の上部に沿って取り付けられ、アシストグリップに近接して配置される。エアバッグ装置は、エアバッグをカーテン状に膨張展開させる。乗員は、エアバッグにより受け止められて保護されるが、その際、膨張展開するエアバッグにより、アシストグリップが破損することがある。 In order to protect occupants in the event of a vehicle emergency or collision, an airbag device for a side wall equipped with an airbag is used. In a folded state, the airbag is attached along the upper part of the passenger compartment to which an assist grip for assisting the occupant is attached, and is disposed close to the assist grip. The airbag device inflates and deploys the airbag in a curtain shape. The occupant is received and protected by the airbag, but the assist grip may be damaged by the airbag that is inflated and deployed.
　図６は、従来のエアバッグ装置とアシストグリップの例を示す断面図である。図６Ａは、エアバッグが膨張する前の図である。図６Ｂは、エアバッグが膨張した後の図である。
　従来のエアバッグ装置１００では、図６Ａに示すように、折り畳まれたエアバッグ１０１が、ヘッドライニング９２Ａ内で車体９９に取り付けられる。ヘッドライニング９２Ａ内には、車体９９に固定された固定部材８８が配置されている。アシストグリップ８０は、車体９９に取り付けられる取付部８１と、乗員が掴む掴み部８２を有する。取付部８１は、ヘッドライニング９２Ａの挿入孔９２Ｂに挿入されて、固定部材８８に取り付けられ、これにより、アシストグリップ８０が、エアバッグ１０１に近接する位置で、車体９９に取り付けられる。 FIG. 6 is a cross-sectional view showing an example of a conventional airbag device and an assist grip. FIG. 6A is a view before the airbag is inflated. FIG. 6B is a view after the airbag is inflated.
In the conventional airbag apparatus 100, as shown in FIG. 6A, the folded airbag 101 is attached to the vehicle body 99 in the headlining 92A. A fixing member 88 fixed to the vehicle body 99 is disposed in the headlining 92A. The assist grip 80 includes an attachment portion 81 attached to the vehicle body 99 and a grip portion 82 that is gripped by the occupant. The attachment portion 81 is inserted into the insertion hole 92B of the headlining 92A and attached to the fixing member 88, whereby the assist grip 80 is attached to the vehicle body 99 at a position close to the airbag 101.
　エアバッグ１０１の膨張展開時には、図６Ｂに示すように、エアバッグ１０１が、ヘッドライニング９２Ａを押し開いて車室Ｓ内に展開する。ヘッドライニング９２Ａは、膨張するエアバッグ１０１により押されて大きく変形する。アシストグリップ８０の取付部８１は、ヘッドライニング９２Ａから受ける力により変形する。その結果、取付部８１が大きなダメージを受けることがある。このように、従来のエアバッグ装置１００では、エアバッグ１０１の膨張展開に伴い、アシストグリップ８０が破損する虞がある。 When the airbag 101 is inflated and deployed, as shown in FIG. 6B, the airbag 101 pushes and opens the headlining 92A and deploys in the vehicle interior S. The head lining 92A is greatly deformed by being pushed by the inflating airbag 101. The attachment portion 81 of the assist grip 80 is deformed by the force received from the headlining 92A. As a result, the attachment portion 81 may be greatly damaged. Thus, in the conventional airbag apparatus 100, the assist grip 80 may be damaged as the airbag 101 is inflated and deployed.
　これに対し、従来、アシストグリップが大きなダメージを受けるのを防止したエアバッグ装置が知られている（特許文献１参照）。
　従来のエアバッグ装置では、インフレータが接続される接続口部を、アシストグリップの近傍に配置する。また、エアバッグ内の上端をアシストグリップの近傍で下方にずらせて、ガスをアシストグリップの近傍で下方に迂回させ、これにより、アシストグリップが大きなダメージを受けるのを防止する。 On the other hand, the airbag apparatus which prevented the assist grip receiving a big damage conventionally is known (refer patent document 1).
In the conventional airbag apparatus, the connection port portion to which the inflator is connected is disposed in the vicinity of the assist grip. Further, the upper end in the airbag is shifted downward in the vicinity of the assist grip, and the gas is diverted downward in the vicinity of the assist grip, thereby preventing the assist grip from being damaged greatly.
　しかしながら、従来のエアバッグ装置では、エアバッグの上部が、最初に、アシストグリップの近傍で膨張する。また、エアバッグの上部は、ヘッドライニング内で、素早く、かつ、大きく膨張するため、膨張するエアバッグの上部がアシストグリップを押して、アシストグリップがダメージを受ける虞がある。エアバッグの上部がヘッドライニングを大きく変形させて、アシストグリップが破損する虞もある。従って、アシストグリップの破損を防止する観点から、アシストグリップが受けるダメージを低減することが求められている。 However, in the conventional airbag device, the upper portion of the airbag is first inflated in the vicinity of the assist grip. Further, since the upper part of the airbag is quickly and greatly inflated in the headlining, the upper part of the inflating airbag may press the assist grip, and the assist grip may be damaged. The upper part of the airbag may greatly deform the headlining, and the assist grip may be damaged. Therefore, from the viewpoint of preventing breakage of the assist grip, it is required to reduce the damage received by the assist grip.
特開２０１１－１０４２号公報JP 2011-1042 A
　本発明は、前記従来の問題に鑑みなされたもので、その目的は、アシストグリップに近接するエアバッグが膨張展開するときに、アシストグリップが受けるダメージを低減して、アシストグリップの破損を防止することである。 The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to reduce damage received by the assist grip and prevent breakage of the assist grip when the airbag adjacent to the assist grip is inflated and deployed. That is.
　本発明は、車室内の上部にアシストグリップの取付部が取り付けられた車両に搭載されるエアバッグ装置であって、アシストグリップに近接する位置で膨張する近接気室を有し、車室内の上部に配置されるエアバッグと、ガスを発生してエアバッグを下方に向かって膨張展開させるインフレータと、を備え、近接気室が、近接気室の下方の端部にガス流入口を有し、ガス流入口のみからガスが流入して膨張するエアバッグ装置である。 The present invention relates to an airbag device mounted on a vehicle in which an assist grip mounting portion is attached to an upper part of a vehicle interior, and includes a proximity air chamber that inflates at a position close to the assist grip, and an upper part of the vehicle interior. And an inflator that generates gas to inflate and deploy the airbag downward, and the proximity air chamber has a gas inlet at the lower end of the proximity air chamber, This is an airbag device that inflates when gas flows in only from the gas inlet.
　本発明によれば、アシストグリップに近接するエアバッグが膨張展開するときに、アシストグリップが受けるダメージを低減できる。また、アシストグリップの破損を防止することができる。 According to the present invention, it is possible to reduce damage to the assist grip when the airbag adjacent to the assist grip is inflated and deployed. Further, the assist grip can be prevented from being damaged.
本実施形態のエアバッグ装置を示す図である。It is a figure which shows the airbag apparatus of this embodiment. 図１の矢視Ｘ１－Ｘ１線で見たエアバッグと車両の断面図である。FIG. 2 is a cross-sectional view of the airbag and the vehicle as viewed in the direction of arrows X1-X1 in FIG. 図２の矢視Ｘ２－Ｘ２線で見たエアバッグと車両の断面図である。FIG. 3 is a cross-sectional view of the airbag and the vehicle as viewed in the direction of arrows X2-X2 in FIG. 平面上に拡げたエアバッグを示す図である。It is a figure which shows the airbag expanded on the plane. 車両内で膨張展開したエアバッグを示す図である。It is a figure which shows the airbag expanded and deployed in the vehicle. 従来のエアバッグ装置とアシストグリップの例を示す断面図である。It is sectional drawing which shows the example of the conventional airbag apparatus and an assist grip.
　本発明のエアバッグ装置の一実施形態について図面を参照して説明する。
　本実施形態のエアバッグ装置は、車両内でエアバッグをカーテン状に展開させるカーテンエアバッグ装置（以下、単にエアバッグ装置という）である。エアバッグ装置は、車両に搭載されて、膨張展開するエアバッグにより乗員を受け止めて保護する。 An embodiment of an airbag device of the present invention will be described with reference to the drawings.
The airbag apparatus according to the present embodiment is a curtain airbag apparatus (hereinafter simply referred to as an airbag apparatus) that deploys an airbag in a curtain shape in a vehicle. The airbag device is mounted on a vehicle and receives and protects an occupant with an airbag that is inflated and deployed.
　図１は、本実施形態のエアバッグ装置を示す図である。図１では、車両９０に搭載したエアバッグ装置１を車室内から見て示している。また、車両９０の側壁９１とエアバッグ装置１を、車両９０の後方側を省略して、かつ、車両９０の幅方向から見て模式的に示している。エアバッグ装置１は、車両９０の内面を透視して示している。
　なお、本発明では、車両９０における前方と後方を単に前方と後方といい、車両９０における前後方向を単に前後方向という。また、車両９０における上方と下方を単に上方と下方といい、車両９０における上下方向を単に上下方向という。 FIG. 1 is a view showing an airbag apparatus according to the present embodiment. In FIG. 1, the airbag apparatus 1 mounted in the vehicle 90 is shown as viewed from the passenger compartment. Further, the side wall 91 and the airbag device 1 of the vehicle 90 are schematically shown as viewed from the width direction of the vehicle 90 with the rear side of the vehicle 90 omitted. The airbag device 1 is shown through the inner surface of the vehicle 90.
In the present invention, the front and rear in the vehicle 90 are simply referred to as front and rear, and the front-rear direction in the vehicle 90 is simply referred to as front-rear direction. In addition, the upper and lower portions in the vehicle 90 are simply referred to as upper and lower portions, and the vertical direction in the vehicle 90 is simply referred to as the vertical direction.
　車両９０は、図示のように、車室内の側壁９１に、上方のルーフレール９２、前方のフロントピラー（Ａピラー）９３、センターピラー（Ｂピラー）９４、及び、後方のリアピラー（Ｃピラー）（図示せず）を備えている。また、車両９０は、側壁９１に、前部ドア９５、後部ドア９６、及び、ドア９５、９６の窓９７、９８を備えている。側壁９１内で、窓９７、９８のガラスが開閉する。側壁９１には、フロントピラートリム９３Ａと、ヘッドライニング９２Ａの一部が取り付けられている。フロントピラートリム９３Ａは、フロントピラー９３に設けられる。ヘッドライニング９２Ａは、ルーフ（図示せず）とルーフレール９２を覆う。 As shown, the vehicle 90 has an upper roof rail 92, a front front pillar (A pillar) 93, a center pillar (B pillar) 94, and a rear rear pillar (C pillar) (see FIG. Not shown). Further, the vehicle 90 includes a front door 95, a rear door 96, and windows 97 and 98 of the doors 95 and 96 on the side wall 91. Within the side wall 91, the glass of the windows 97 and 98 opens and closes. A front pillar trim 93A and a part of the head lining 92A are attached to the side wall 91. The front pillar trim 93 </ b> A is provided on the front pillar 93. The headlining 92A covers the roof (not shown) and the roof rail 92.
　車両９０は、車室内に配置されたアシストグリップ８０（図１では二点鎖線で示す）を備えている。アシストグリップ８０の取付部８１は、車室内の上部に取り付けられている。ここでは、アシストグリップ８０は、前部ドア９５の上方に、かつ、側壁９１の上部に設けられる。取付部８１は、側壁９１の上部（ルーフレール９２）に取り付けられる。 The vehicle 90 includes an assist grip 80 (indicated by a two-dot chain line in FIG. 1) disposed in the vehicle interior. The attachment part 81 of the assist grip 80 is attached to the upper part of the vehicle interior. Here, the assist grip 80 is provided above the front door 95 and above the side wall 91. The attachment portion 81 is attached to the upper portion (roof rail 92) of the side wall 91.
　エアバッグ装置１は、エアバッグ（カーテンエアバッグ）１０と、筒状のインフレータ２を備えている。エアバッグ１０は、膨張展開できるように折り畳まれて、車両９０内に取り付けられる。その際、エアバッグ１０は、例えば、下方の縁部（下縁部という）から上方の縁部（上縁部という）に向かって蛇腹状に折り畳まれる。又は、エアバッグ１０は、下縁部から上縁部に向けて、かつ、側壁９１側に巻かれてロール折りされる。或いは、エアバッグ１０は、蛇腹状の折りとロール折りを複合した複合折りにより折り畳まれる。これらの折り畳みにより、エアバッグ装置１の作動時に、エアバッグ１０が、側壁９１（窓９７、９８）に沿って展開する。エアバッグ１０は、乗員と側壁９１の間で膨張展開する。エアバッグ１０は、細長く折り畳まれた状態で、車室内の側壁９１の上部に配置される。エアバッグ１０は、前後方向に沿ってルーフレール９２に取り付けられる。エアバッグ１０は、リアピラーからフロントピラー９３まで配置される。 The airbag device 1 includes an airbag (curtain airbag) 10 and a tubular inflator 2. The airbag 10 is folded and attached to the vehicle 90 so as to be inflated and deployed. At that time, for example, the airbag 10 is folded in a bellows shape from a lower edge (referred to as a lower edge) toward an upper edge (referred to as an upper edge). Alternatively, the airbag 10 is rolled and folded from the lower edge portion toward the upper edge portion and wound on the side wall 91 side. Alternatively, the airbag 10 is folded by a composite fold combining a bellows-like fold and a roll fold. By these folding, the airbag 10 is deployed along the side wall 91 (windows 97 and 98) when the airbag apparatus 1 is operated. The airbag 10 is inflated and deployed between the occupant and the side wall 91. The airbag 10 is disposed on the upper portion of the side wall 91 in the passenger compartment in a state where the airbag 10 is folded into an elongated shape. The airbag 10 is attached to the roof rail 92 along the front-rear direction. The airbag 10 is disposed from the rear pillar to the front pillar 93.
　折り畳まれたエアバッグ１０は、フロントピラートリム９３Ａとヘッドライニング９２Ａ内に配置される。エアバッグ１０は、固定手段（図示せず）により車体９９に固定される。フロントピラートリム９３Ａとヘッドライニング９２Ａは、車体９９に取り付けられて、エアバッグ１０を覆う。エアバッグ１０の前方部１１は、フロントピラートリム９３Ａ内で、車体９９に取り付けられる。また、折り畳まれたエアバッグ１０は、アシストグリップ８０に近接して配置される部分１２を有する。エアバッグ１０の一部が、アシストグリップ８０に沿って配置される。アシストグリップ８０及び取付部８１は、折り畳まれたエアバッグ１０の近傍で車体９９に取り付けられる。 The folded airbag 10 is disposed in the front pillar trim 93A and the headlining 92A. The airbag 10 is fixed to the vehicle body 99 by fixing means (not shown). The front pillar trim 93 </ b> A and the head lining 92 </ b> A are attached to the vehicle body 99 and cover the airbag 10. The front portion 11 of the airbag 10 is attached to the vehicle body 99 in the front pillar trim 93A. Further, the folded airbag 10 has a portion 12 that is disposed in the vicinity of the assist grip 80. A part of the airbag 10 is disposed along the assist grip 80. The assist grip 80 and the attachment portion 81 are attached to the vehicle body 99 in the vicinity of the folded airbag 10.
　インフレータ２は、シリンダタイプのガス発生装置であり、エアバッグ１０内に挿入されて、エアバッグ１０内でガスを発生する。インフレータ２は、長手方向の一端部に、複数のガスの噴出口２Ａを有し、センターピラー９４の上方に配置されて、ルーフレール９２に取り付けられる。インフレータ２は、固定手段（図示せず）により、ヘッドライニング９２Ａ内で車体９９に固定される。車両緊急時や衝撃検知時に、インフレータ２は、複数の噴出口２Ａからガスを発生し、エアバッグ１０にガスを供給する。このガスにより、エアバッグ１０を、側壁９１の上部から下方に向かって膨張展開させる。エアバッグ１０は、側壁９１に沿ってカーテン状に膨張展開し、その一部は、アシストグリップ８０の近接位置から下方に展開する。 The inflator 2 is a cylinder type gas generator and is inserted into the airbag 10 to generate gas in the airbag 10. The inflator 2 has a plurality of gas ejection openings 2 </ b> A at one end in the longitudinal direction, is disposed above the center pillar 94, and is attached to the roof rail 92. The inflator 2 is fixed to the vehicle body 99 in the headlining 92A by a fixing means (not shown). In the event of a vehicle emergency or impact detection, the inflator 2 generates gas from the plurality of jet outlets 2A and supplies the gas to the airbag 10. With this gas, the airbag 10 is inflated and deployed downward from the top of the side wall 91. The airbag 10 is inflated and deployed in a curtain shape along the side wall 91, and a part of the airbag 10 is deployed downward from a position near the assist grip 80.
　図２は、図１の矢視Ｘ１－Ｘ１線で見たエアバッグ１０と車両９０の断面図である。図２では、アシストグリップ８０を、取付部８１を含む断面図で示している。図３は、図２の矢視Ｘ２－Ｘ２線で見たエアバッグ１０と車両９０の断面図である。図３では、エアバッグ１０を点線で示している。
　アシストグリップ８０は、図示のように、一対の取付部８１と、乗員が掴む掴み部８２を有する。一対の取付部８１は、それぞれ掴み部８２の端部に形成され、掴み部８２から同じ方向に突出する。取付部８１の先端には、環状の突起８１Ａが形成されている。 FIG. 2 is a cross-sectional view of the airbag 10 and the vehicle 90 as seen in the direction of arrows X1-X1 in FIG. In FIG. 2, the assist grip 80 is shown in a cross-sectional view including the attachment portion 81. FIG. 3 is a cross-sectional view of the airbag 10 and the vehicle 90 as seen in the direction of arrows X2-X2 in FIG. In FIG. 3, the airbag 10 is indicated by a dotted line.
As shown in the figure, the assist grip 80 has a pair of attachment portions 81 and a grip portion 82 that is held by a passenger. The pair of attachment portions 81 are formed at the ends of the grip portion 82 and project from the grip portion 82 in the same direction. An annular protrusion 81 </ b> A is formed at the tip of the attachment portion 81.
　車両９０は、車体９９(ルーフレール９２)に固定された一対の固定部材８８を備えている。固定部材８８は、アシストグリップ８０が取り付けられるブラケットであり、ヘッドライニング９２Ａ内に配置される。アシストグリップ８０の取付部８１は、ヘッドライニング９２Ａの挿入孔９２Ｂに挿入されて、固定部材８８の取付孔８９に押し込まれる。取付部８１の突起８１Ａが、取付孔８９に押し込まれて、固定部材８８に固定され、これにより、一対の取付部８１が、一対の固定部材８８に取り付けられる。アシストグリップ８０は、折り畳まれたエアバッグ１０に近接する位置で車体９９に取り付けられる。 The vehicle 90 includes a pair of fixing members 88 fixed to the vehicle body 99 (roof rail 92). The fixing member 88 is a bracket to which the assist grip 80 is attached, and is disposed in the headlining 92A. The attachment portion 81 of the assist grip 80 is inserted into the insertion hole 92B of the headlining 92A and pushed into the attachment hole 89 of the fixing member 88. The protrusion 81 </ b> A of the attachment portion 81 is pushed into the attachment hole 89 and is fixed to the fixing member 88, whereby the pair of attachment portions 81 are attached to the pair of fixing members 88. The assist grip 80 is attached to the vehicle body 99 at a position close to the folded airbag 10.
　折り畳まれたエアバッグ１０は、アシストグリップ８０が取り付けられた位置のヘッドライニング９２Ａ内に配置される。エアバッグ１０の一部は、アシストグリップ８０と固定部材８８の下方又は側方に近接する。膨張展開時に、エアバッグ１０は、フロントピラートリム９３Ａとヘッドライニング９２Ａを押し開いて、車室Ｓ内に展開する。アシストグリップ８０の周辺部では、エアバッグ１０が、ヘッドライニング９２Ａを下方に変形させて車室Ｓ内に展開する。 The folded airbag 10 is disposed in the headlining 92A at the position where the assist grip 80 is attached. A part of the airbag 10 is close to the lower side or the side of the assist grip 80 and the fixing member 88. At the time of inflation and deployment, the airbag 10 pushes the front pillar trim 93 </ b> A and the headlining 92 </ b> A open and deploys in the vehicle interior S. At the periphery of the assist grip 80, the airbag 10 is deployed in the passenger compartment S with the headlining 92A deformed downward.
　図４は、平面上に拡げたエアバッグ１０を示す図である。図４では、エアバッグ１０内のガスの流れを矢印で示している。また、図４には、アシストグリップ８０を二点鎖線で示している。
　エアバッグ１０は、図示のように、前後方向に長い袋体であり、例えば、樹脂を被覆した布からなる基布により製造される。ここでは、エアバッグ１０は、乗員側の表基布（表パネル）１３と、側壁９１側の裏基布（裏パネル）１４とを有する。また、エアバッグ１０は、連結ベルト２０と、複数（図４では、６つ）の固定布２１～２６と、筒状のガス供給部２７を有する。ガス供給部２７内には、インフレータ２（図４では図示せず）が挿入される。 FIG. 4 is a view showing the airbag 10 spread on a plane. In FIG. 4, the gas flow in the airbag 10 is indicated by arrows. Moreover, in FIG. 4, the assist grip 80 is shown with the dashed-two dotted line.
As shown in the figure, the airbag 10 is a bag body that is long in the front-rear direction, and is manufactured, for example, from a base fabric made of a cloth coated with a resin. Here, the airbag 10 includes a front base fabric (front panel) 13 on the passenger side and a back base fabric (back panel) 14 on the side wall 91 side. The airbag 10 includes a connecting belt 20, a plurality (six in FIG. 4) of fixed cloths 21 to 26, and a cylindrical gas supply unit 27. Inflator 2 (not shown in FIG. 4) is inserted into gas supply unit 27.
　エアバッグ１０の前方端は、連結ベルト２０によりフロントピラー９３に連結される。複数の固定布２１～２６は、エアバッグ１０の上縁部に一体に形成されている。連結ベルト２０と固定布２１～２６は、ボルト等からなる固定手段（図示せず）により、フロントピラー９３とルーフレール９２に固定される。エアバッグ１０は、固定布２１～２６により車体９９に取り付けられる。 The front end of the airbag 10 is connected to the front pillar 93 by the connecting belt 20. The plurality of fixed fabrics 21 to 26 are integrally formed on the upper edge portion of the airbag 10. The connecting belt 20 and the fixing cloths 21 to 26 are fixed to the front pillar 93 and the roof rail 92 by fixing means (not shown) made of bolts or the like. The airbag 10 is attached to the vehicle body 99 by fixed fabrics 21 to 26.
　表基布１３と裏基布１４は、同じ形状に形成され、重ね合わせて、外縁接合部１５で接合される。基布１３、１４は、対向して配置されて、互いの間に膨張部３０を形成する。膨張部３０は、外縁接合部１５により区画されて、エアバッグ１０の対向する布（基布１３、１４）の間に形成され、インフレータ２が発生するガスにより膨張する。外縁接合部１５は、膨張部３０の外縁形状を規定する。基布１３、１４は、外縁接合部１５で、縫製及び接着により接合される。即ち、基布１３、１４は、外縁接合部１５に沿って、１周又は複数周縫製されるとともに、縫製した部分が接着剤によりシールされる。これにより、基布１３、１４は、気密状に接合される。 The front base fabric 13 and the back base fabric 14 are formed in the same shape, overlapped, and joined by the outer edge joint portion 15. The base fabrics 13 and 14 are arranged to face each other and form an inflating portion 30 between them. The inflatable portion 30 is defined by the outer edge joint portion 15, is formed between the facing fabrics (base fabrics 13 and 14) of the airbag 10, and is inflated by the gas generated by the inflator 2. The outer edge joint portion 15 defines the outer edge shape of the inflating portion 30. The base fabrics 13 and 14 are joined at the outer edge joint portion 15 by sewing and adhesion. That is, the base fabrics 13 and 14 are sewn one or more times along the outer edge joint portion 15, and the sewn portions are sealed with an adhesive. Thereby, the base fabrics 13 and 14 are joined in an airtight manner.
　エアバッグ１０には、外縁接合部１５により、前膨張部３１、後膨張部３２、及び、連結膨張部３３が形成される。膨張部３１～３３は、全体としてエアバッグ１０の膨張部３０を構成する。前膨張部３１は、エアバッグ１０内で前方に配置され、前部ドア９５の窓９７とセンターピラー９４の側方で膨張して、主に前席の乗員を受け止める。後膨張部３２は、エアバッグ１０内で後方に配置され、後部ドア９６の上方で膨張して、主に後席の乗員を受け止める。連結膨張部３３は、前膨張部３１と後膨張部３２を連結する。３つの膨張部３１～３３の間には、非膨張部３４が形成されており、非膨張部３４は、膨張部３０の外に設けられる。 In the airbag 10, a front inflating portion 31, a rear inflating portion 32, and a connected inflating portion 33 are formed by the outer edge joint portion 15. The inflating parts 31 to 33 constitute the inflating part 30 of the airbag 10 as a whole. The front inflating portion 31 is disposed forward in the airbag 10 and inflates at the side of the window 97 of the front door 95 and the center pillar 94 to mainly receive the front seat occupant. The rear inflating portion 32 is disposed rearward in the airbag 10 and inflates above the rear door 96 to mainly receive the rear seat occupant. The connection expansion part 33 connects the front expansion part 31 and the rear expansion part 32. A non-expandable portion 34 is formed between the three expandable portions 31 to 33, and the non-expandable portion 34 is provided outside the expandable portion 30.
　ガス供給部２７は、エアバッグ１０内にガスを供給するための開口部であり、エアバッグ１０の前後方向の中間に形成され、前膨張部３１の後方端に開口する。基布１３、１４は、ガス供給部２７において、エアバッグ１０の上縁部から斜め上方に突出する。基布１３、１４の縁部は、先端の挿入口２７Ａを除いて、外縁接合部１５から連続して接合される。これにより、ガス供給部２７は、両端が開口した筒状に形成され、エアバッグ１０の上縁部に一体に設けられる。ガス供給部２７の内部は、一端の挿入口２７Ａでエアバッグ１０の外部に繋がり、他端で膨張部３０の内部と繋がる。 The gas supply unit 27 is an opening for supplying gas into the airbag 10, is formed in the middle of the airbag 10 in the front-rear direction, and opens at the rear end of the front inflating unit 31. The base fabrics 13 and 14 protrude obliquely upward from the upper edge of the airbag 10 in the gas supply unit 27. The edges of the base fabrics 13 and 14 are joined continuously from the outer edge joint 15 except for the insertion port 27A at the tip. Thereby, the gas supply part 27 is formed in the cylinder shape which both ends opened, and is provided in the upper edge part of the airbag 10 integrally. The inside of the gas supply unit 27 is connected to the outside of the airbag 10 through an insertion port 27A at one end and is connected to the inside of the inflating unit 30 at the other end.
　インフレータ２は、挿入口２７Ａからガス供給部２７に挿入されて、エアバッグ１０内に配置され、例えば、ガスを整流するディフューザを設けたガス供給部２７内に挿入される。ガス供給部２７は、バンド（図示せず）で締め付けられて、インフレータ２に気密状に固定される。インフレータ２は、ガス供給部２７内でガスを発生する。ガス供給部２７は、インフレータ２が発生するガスをエアバッグ１０内へ供給する。ガスは、ガス供給部２７からエアバッグ１０の膨張部３０へ供給され、前膨張部３１へ供給されるとともに、連結膨張部３３から後膨張部３２へ供給される。これにより、エアバッグ１０が膨張展開する。 The inflator 2 is inserted into the gas supply unit 27 through the insertion port 27A and disposed in the airbag 10, and is inserted into the gas supply unit 27 provided with, for example, a diffuser that rectifies the gas. The gas supply unit 27 is fastened with a band (not shown) and fixed to the inflator 2 in an airtight manner. The inflator 2 generates gas in the gas supply unit 27. The gas supply unit 27 supplies the gas generated by the inflator 2 into the airbag 10. The gas is supplied from the gas supply unit 27 to the inflating unit 30 of the airbag 10, supplied to the front inflating unit 31, and supplied from the connected inflating unit 33 to the rear inflating unit 32. Thereby, the airbag 10 is inflated and deployed.
　エアバッグ１０は、外縁接合部１５（膨張部３０）内に位置する複数の内部接合部（第１～第４の内部接合部１６～１９）を有する。内部接合部１６～１９は、膨張部３０内で、対向する基布１３、１４が接合された接合部である。基布１３、１４は、内部接合部１６～１９で、外縁接合部１５と同様に接合される。内部接合部１６～１９は、それぞれ外縁接合部１５から膨張部３０内へ向かって延びるように膨張部３０内に形成され、その先端は、膨張部３０内で環状に接合される。内部接合部１６～１９の環状部１６Ａ～１９Ａは、外縁接合部１５から離して形成される。 The airbag 10 has a plurality of internal joint portions (first to fourth internal joint portions 16 to 19) located in the outer edge joint portion 15 (inflatable portion 30). The internal joint portions 16 to 19 are joint portions in which the opposing base fabrics 13 and 14 are joined within the inflatable portion 30. The base fabrics 13 and 14 are joined at the inner joint portions 16 to 19 in the same manner as the outer edge joint portion 15. The inner joint parts 16 to 19 are formed in the inflatable part 30 so as to extend from the outer edge joint part 15 into the inflatable part 30, respectively, and their tips are joined in an annular shape in the inflatable part 30. The annular portions 16A to 19A of the inner joint portions 16 to 19 are formed apart from the outer edge joint portion 15.
　複数の内部接合部１６～１９は、前後方向に離して配置され、膨張部３０内にガスの流通部と気室を形成する。即ち、内部接合部１６～１９は、膨張部３０を区画する区画用接合部であり、エアバッグ１０の対向する布（基布１３、１４）を接合して、膨張部３０を区画する。内部接合部１６～１９は、膨張部３０に第１～第５の気室３５～３９を形成する。第１～第３の内部接合部１６～１８により、第１～第３の気室３５～３７が、前膨張部３１に形成される。第１～第３の気室３５～３７は、前後方向に並べて配置され、これら気室３５～３７では、上部と側部が閉鎖されて、下部のみが開放している。ガスは、第１～第３の気室３５～３７に下方のみから流入する。 The plurality of internal joints 16 to 19 are arranged apart from each other in the front-rear direction, and form a gas circulation part and an air chamber in the expansion part 30. That is, the internal joint portions 16 to 19 are partition joint portions that partition the inflatable portion 30, and join the cloths (base fabrics 13 and 14) facing the airbag 10 to partition the inflatable portion 30. The internal joint portions 16 to 19 form first to fifth air chambers 35 to 39 in the expansion portion 30. First to third air chambers 35 to 37 are formed in the front expansion portion 31 by the first to third internal joint portions 16 to 18. The first to third air chambers 35 to 37 are arranged side by side in the front-rear direction. In the air chambers 35 to 37, the upper part and the side part are closed, and only the lower part is open. The gas flows into the first to third air chambers 35 to 37 only from below.
　第１～第３の気室３５～３７は、エアバッグ１０内で上方の端部から上下方向の中間部まで形成され、第１の気室３５は、エアバッグ１０内の最前方部に設けられる。第１の気室３５は、エアバッグ１０を車両９０に取り付けるときに、フロントピラートリム９３Ａ内に配置される。第１の気室３５は、エアバッグ１０の膨張展開時に、フロントピラートリム９３Ａ内から車室Ｓ内に展開する。第２と第３の気室３６、３７は、第１の気室３５の後方に設けられ、エアバッグ１０を車両９０に取り付けるときに、ヘッドライニング９２Ａ内に配置され、エアバッグ１０の膨張展開時に、ヘッドライニング９２Ａ内から車室Ｓ内に展開する。 The first to third air chambers 35 to 37 are formed in the airbag 10 from the upper end portion to the middle portion in the vertical direction, and the first air chamber 35 is provided in the forefront portion in the airbag 10. It is done. The first air chamber 35 is disposed in the front pillar trim 93 </ b> A when the airbag 10 is attached to the vehicle 90. The first air chamber 35 is deployed from the front pillar trim 93 </ b> A into the vehicle compartment S when the airbag 10 is inflated and deployed. The second and third air chambers 36 and 37 are provided behind the first air chamber 35, and are disposed in the headlining 92A when the airbag 10 is attached to the vehicle 90, so that the airbag 10 is inflated and deployed. Occasionally, it develops from the headlining 92A into the passenger compartment S.
　第１～第３の気室３５～３７は、アシストグリップ８０に近接する位置で膨張する近接気室４０Ａ～４０Ｃである。近接気室４０Ａ～４０Ｃは、ガス流入口４１Ａ～４１Ｃを有する。ガス流入口４１Ａ～４１Ｃは、近接気室４０Ａ～４０Ｃの下方の端部に設けられたエアバッグ１０の非接合部からなり、それぞれ１つのガス流入口４１Ａ～４１Ｃのみが開口するようにエアバッグ１０の膨張部３０に形成される。近接気室４０Ａ～４０Ｃのガス流入口４１Ａ～４１Ｃ以外の外縁は、閉鎖されている。ガス流入口４１Ａ～４１Ｃは、近接気室４０Ａ～４０Ｃに下方からガスを流入させる。近接気室４０Ａ～４０Ｃは、ガス流入口４１Ａ～４１Ｃのみからガスが流入して膨張する。 The first to third air chambers 35 to 37 are close air chambers 40A to 40C that expand at positions close to the assist grip 80. The proximity air chambers 40A to 40C have gas inlets 41A to 41C. The gas inlets 41A to 41C are formed of non-joined portions of the airbag 10 provided at the lower ends of the proximity air chambers 40A to 40C, and the airbags are opened so that only one gas inlet 41A to 41C is opened. 10 inflatable portions 30 are formed. The outer edges of the adjacent air chambers 40A to 40C other than the gas inlet ports 41A to 41C are closed. The gas inlets 41A to 41C allow gas to flow into the adjacent air chambers 40A to 40C from below. The proximity air chambers 40A to 40C expand when gas flows in only from the gas inlet ports 41A to 41C.
　エアバッグ１０は、膨張部３０に、アシストグリップ８０に近接して配置される複数（ここでは３つ）の近接気室４０Ａ～４０Ｃを有する。近接気室４０Ａ～４０Ｃは、膨張展開するエアバッグ１０のアシストグリップ８０に近接する近接部２８に設けられる。エアバッグ１０の近接部２８は、近接気室４０Ａ～４０Ｃからなる。また、膨張部３０のアシストグリップ８０に近接する部分（近接膨張部）も、近接気室４０Ａ～４０Ｃからなる。複数の近接気室４０Ａ～４０Ｃは、アシストグリップ８０の複数の取付部８１に近接して配置される。一方の取付部８１（インフレータ２側の取付部８１）には、１つの近接気室４０Ｃが近接し、他方の取付部８１には、複数（ここでは２つ）の近接気室４０Ａ、４０Ｂが近接する。 The airbag 10 has a plurality (three in this case) of proximity air chambers 40A to 40C disposed in the inflating portion 30 in the vicinity of the assist grip 80. The proximity air chambers 40A to 40C are provided in the proximity portion 28 close to the assist grip 80 of the airbag 10 that is inflated and deployed. The proximity portion 28 of the airbag 10 includes proximity air chambers 40A to 40C. Further, the portion (proximity expansion portion) of the expansion portion 30 that is close to the assist grip 80 is also composed of the proximity air chambers 40A to 40C. The plurality of proximity air chambers 40A to 40C are disposed in proximity to the plurality of attachment portions 81 of the assist grip 80. One proximity air chamber 40C is adjacent to one attachment portion 81 (attachment portion 81 on the inflator 2 side), and a plurality (two in this case) of proximity air chambers 40A and 40B are adjacent to the other attachment portion 81. Proximity.
　第１と第２の内部接合部１６、１７は、近接気室４０Ａ～４０Ｃを形成するとともに、アシストグリップ８０に近接して配置される。第１の内部接合部１６の上方の端部は、上記した他方の取付部８１に近接する位置に形成される。第２の内部接合部１７の上方の端部は、２つの取付部８１の間の位置に形成される。このように、エアバッグ１０は、１つの取付部８１に近接して配置される複数の近接気室４０Ａ、４０Ｂと、取付部８１に近接して配置される第１の内部接合部１６を有する。 The first and second internal joint portions 16 and 17 form the proximity air chambers 40A to 40C and are disposed in proximity to the assist grip 80. The upper end portion of the first internal joint portion 16 is formed at a position close to the other mounting portion 81 described above. An upper end portion of the second internal joint portion 17 is formed at a position between the two attachment portions 81. As described above, the airbag 10 includes a plurality of proximity air chambers 40A and 40B disposed in the vicinity of one mounting portion 81 and the first internal joint portion 16 disposed in the vicinity of the mounting portion 81. .
　前膨張部３１には、中間膨張部４２と流通部４３が形成される。中間膨張部４２は、ガス供給部２７と流通部４３の間で膨張する気室であり、エアバッグ１０の前後方向の中央部に配置されている。中間膨張部４２は、第３の内部接合部１８により、前膨張部３１の後方端で、ガス供給部２７から下方に向かって形成される。 The intermediate expansion part 42 and the flow part 43 are formed in the front expansion part 31. The intermediate inflating part 42 is an air chamber that inflates between the gas supply part 27 and the circulation part 43, and is arranged at the center part in the front-rear direction of the airbag 10. The intermediate expansion portion 42 is formed from the gas supply portion 27 downward by the third internal joint portion 18 at the rear end of the front expansion portion 31.
　流通部４３は、近接気室４０Ａ～４０Ｃの下方に設けられたガスの通路であり、エアバッグ１０内の下方の端部に設けられている。流通部４３は、近接気室４０Ａ～４０Ｃと外縁接合部１５の間に位置し、エアバッグ１０の下縁部に沿って形成されており、中間膨張部４２の下部と複数の近接気室４０Ａ～４０Ｃの下部（ガス流入口４１Ａ～４１Ｃ）とを連通させる。ガスは、流通部４３を通って、中間膨張部４２から近接気室４０Ａ～４０Ｃまで流通する。流通部４３は、ガスをエアバッグ１０の下縁部に沿って、複数のガス流入口４１Ａ～４１Ｃまで流通させる。ガスは、流通部４３から、近接気室４０Ａ～４０Ｃのガス流入口４１Ａ～４１Ｃに流入する。近接気室４０Ａ～４０Ｃは、流通部４３から流入するガスのみにより流通部４３の上方で膨張する。 The circulation part 43 is a gas passage provided below the proximity air chambers 40A to 40C, and is provided at the lower end in the airbag 10. The circulation part 43 is located between the proximity air chambers 40A to 40C and the outer edge joint part 15, and is formed along the lower edge part of the airbag 10. The lower part of the intermediate inflating part 42 and the plurality of proximity air chambers 40A. The lower part (gas inlets 41A to 41C) of ˜40C is communicated. The gas flows from the intermediate expansion portion 42 to the proximity air chambers 40A to 40C through the flow portion 43. The circulation part 43 circulates the gas along the lower edge of the airbag 10 to the plurality of gas inflow ports 41A to 41C. The gas flows from the circulation part 43 into the gas inlets 41A to 41C of the proximity air chambers 40A to 40C. The proximity air chambers 40A to 40C are expanded above the circulation part 43 by only the gas flowing in from the circulation part 43.
　インフレータ２が発生するガスは、ガス供給部２７から中間膨張部４２へ供給される。中間膨張部４２は、最初に膨張を開始する。前膨張部３１内で、ガスは、中間膨張部４２から流通部４３へ流れる。流通部４３は、中間膨張部４２から第１の気室３５へ向かって膨張する。ガスは、流通部４３を通過する間に、近接気室４０Ｃ、４０Ｂ（第３と第２の気室３７、３６）に流入する。また、ガスは、流通部４３を通って近接気室４０Ａ（第１の気室３５）に流入する。近接気室４０Ａ～４０Ｃは、流通部４３に続いて膨張を開始して、流通部４３の膨張に伴い順に膨張し、後方から前方の順に、タイミングをずらして膨張する。 The gas generated by the inflator 2 is supplied from the gas supply unit 27 to the intermediate expansion unit 42. The intermediate inflating part 42 starts to inflate first. In the front expansion part 31, the gas flows from the intermediate expansion part 42 to the circulation part 43. The circulation part 43 expands from the intermediate expansion part 42 toward the first air chamber 35. The gas flows into the adjacent air chambers 40C and 40B (the third and second air chambers 37 and 36) while passing through the circulation part 43. Further, the gas flows through the circulation part 43 and flows into the close air chamber 40A (first air chamber 35). The near-air chambers 40A to 40C start to expand following the flow part 43, expand in order with the expansion of the flow part 43, and expand at different timings from the rear to the front.
　後膨張部３２には、第４の内部接合部１９により、第４と第５の気室３８、３９が形成される。インフレータ２が発生するガスは、連結膨張部３３及び第４の気室３８を通過して、第５の気室３９に下部から流入する。第４と第５の気室３８、３９は、後膨張部３２内で順に膨張する。 4th and 5th air chambers 38 and 39 are formed in the rear inflating portion 32 by the fourth internal joint portion 19. The gas generated by the inflator 2 passes through the connected expansion portion 33 and the fourth air chamber 38 and flows into the fifth air chamber 39 from the lower part. The fourth and fifth air chambers 38 and 39 expand in order in the rear expansion portion 32.
　エアバッグ装置１は、車両９０に搭載された後、作動信号を受信したときにインフレータ２を作動させる。インフレータ２は、ガスを発生し、ガスを膨張部３０へ供給して、エアバッグ１０を膨張展開させる。エアバッグ１０は、折り畳み形状を解消しつつカーテン状に展開する。エアバッグ１０は、乗員と側壁９１との間で膨張展開して、前席と後席の乗員を受け止めて乗員の頭部を中心に保護する。 The air bag device 1 operates the inflator 2 when it receives an operation signal after being mounted on the vehicle 90. The inflator 2 generates gas and supplies the gas to the inflating unit 30 to inflate and deploy the airbag 10. The airbag 10 is deployed in a curtain shape while eliminating the folded shape. The airbag 10 is inflated and deployed between the occupant and the side wall 91, receives the occupant in the front seat and the rear seat, and protects the occupant's head around the head.
　図５は、車両９０内で膨張展開したエアバッグ１０を示す図である。図５は、車両９０の側壁９１とエアバッグ装置１を、図１に対応させて示している。図５には、アシストグリップ８０を二点鎖線で模式的に示している。
　エアバッグ１０は、図示のように、側壁９１を覆うように、側壁９１に沿って膨張展開する。エアバッグ１０は、ドア９５、９６の位置まで展開して、窓９７、９８を塞ぐ。 FIG. 5 is a view showing the airbag 10 inflated and deployed in the vehicle 90. FIG. 5 shows the side wall 91 of the vehicle 90 and the airbag device 1 corresponding to FIG. In FIG. 5, the assist grip 80 is schematically shown by a two-dot chain line.
As illustrated, the airbag 10 is inflated and deployed along the side wall 91 so as to cover the side wall 91. The airbag 10 is deployed to the positions of the doors 95 and 96 and closes the windows 97 and 98.
　エアバッグ１０の前膨張部３１は、フロントピラー９３からセンターピラー９４までの領域（側壁９１の前方領域）で膨張展開する。その際、中間膨張部４２が、最初に膨張を開始して車室Ｓ内に展開する。中間膨張部４２は、上方から下方に向かって展開する。エアバッグ１０は、展開する中間膨張部４２により下方に引っ張られ、これにより、中間膨張部４２を含むエアバッグ１０の中間部分が、ヘッドライニング９２Ａ内から引き出されて車室Ｓ内に展開する。近接気室４０Ａ～４０Ｃは、中間膨張部４２の引っ張りにより次第に車室Ｓ内に展開する。続いて、中間膨張部４２から流入するガスにより、流通部４３が膨張を開始する。流通部４３内のガスは、近接気室４０Ａ～４０Ｃにガス流入口４１Ａ～４１Ｃから流入する。 The front inflating portion 31 of the airbag 10 is inflated and deployed in an area from the front pillar 93 to the center pillar 94 (an area in front of the side wall 91). At that time, the intermediate inflating portion 42 first expands and expands in the passenger compartment S. The intermediate expansion part 42 develops from the upper side to the lower side. The airbag 10 is pulled downward by the deploying intermediate inflatable portion 42, whereby the intermediate portion of the airbag 10 including the intermediate inflating portion 42 is pulled out from the headlining 92 </ b> A and deployed in the vehicle interior S. The proximity air chambers 40A to 40C gradually expand into the vehicle interior S due to the pulling of the intermediate expansion portion. Subsequently, the flow part 43 starts to expand by the gas flowing in from the intermediate expansion part 42. The gas in the circulation part 43 flows into the adjacent air chambers 40A to 40C from the gas inlets 41A to 41C.
　ガス流入口４１Ａ～４１Ｃは、近接気室４０Ａ～４０Ｃの下方の端部に設けられている。近接気室４０Ａ～４０Ｃは、下方から流入するガスにより、下方から上方に向かって膨張する。ガスがエアバッグ１０内で下方に達して、エアバッグ１０の一部が車室Ｓ内に引き出された後に、近接気室４０Ａ～４０Ｃの膨張が開始する。ガスは、エアバッグ１０の各部を膨張させつつ、ガス流入口４１Ａ～４１Ｃまで流通して近接気室４０Ａ～４０Ｃに流入する。また、近接気室４０Ａ～４０Ｃへのガスの流入は、ガス流入口４１Ａ～４１Ｃが車室Ｓ内に引き出されて展開するまで抑制される。そのため、近接気室４０Ａ～４０Ｃは、エアバッグ１０内で遅れて膨張を開始する。近接気室４０Ａ～４０Ｃは、薄い状態でヘッドライニング９２Ａから引き出され、ヘッドライニング９２Ａを大きく押し開くことなく、車室Ｓ内に展開する。 The gas inlets 41A to 41C are provided at the lower ends of the proximity air chambers 40A to 40C. The proximity air chambers 40A to 40C are expanded from below to above by the gas flowing in from below. After the gas reaches the lower side in the airbag 10 and a part of the airbag 10 is drawn into the vehicle compartment S, expansion of the proximity air chambers 40A to 40C starts. The gas flows through the gas inflow ports 41A to 41C and flows into the adjacent air chambers 40A to 40C while inflating each part of the airbag 10. Further, the inflow of gas into the proximity air chambers 40A to 40C is suppressed until the gas inflow ports 41A to 41C are drawn into the passenger compartment S and deployed. Therefore, the proximity air chambers 40A to 40C start inflating with a delay in the airbag 10. The proximity air chambers 40A to 40C are pulled out from the head lining 92A in a thin state, and are deployed in the vehicle interior S without largely opening the head lining 92A.
　近接気室４０Ａ～４０Ｃは、アシストグリップ８０から離れた位置（下方）から膨張を開始する。また、ガスの勢いは近接気室４０Ａ～４０Ｃ内を流れる間に低下するため、アシストグリップ８０の近傍では、近接気室４０Ａ～４０Ｃの膨張速度が遅くなる。その結果、アシストグリップ８０に近接する位置で、エアバッグ１０が、素早く、かつ、大きく膨張するのが抑制される。エアバッグ１０は、アシストグリップ８０に直接又は間接的に強く干渉（又は衝突）することなく膨張し、これにより、アシストグリップ８０がエアバッグ１０に直接又は間接的に押されるのを防止する。また、エアバッグ１０がアシストグリップ８０に衝撃を加えるのを防止し、アシストグリップ８０にダメージを与えるのも抑制する。アシストグリップ８０の取付部８１の周辺では、ヘッドライニング９２Ａの変形が小さくなるため、取付部８１がヘッドライニング９２Ａから受ける力が小さくなる。取付部８１の変形も抑制される。そのため、取付部８１のダメージが小さくなる。 The proximity air chambers 40A to 40C start to expand from a position (downward) away from the assist grip 80. Further, since the gas momentum decreases while flowing in the proximity air chambers 40A to 40C, in the vicinity of the assist grip 80, the expansion speed of the proximity air chambers 40A to 40C becomes slow. As a result, the airbag 10 is restrained from being inflated quickly and greatly at a position close to the assist grip 80. The airbag 10 is inflated without strongly or directly interfering with (or colliding with) the assist grip 80, thereby preventing the assist grip 80 from being pushed directly or indirectly on the airbag 10. Further, the airbag 10 is prevented from applying an impact to the assist grip 80, and damage to the assist grip 80 is also suppressed. In the vicinity of the attachment portion 81 of the assist grip 80, since the deformation of the head lining 92A is small, the force received by the attachment portion 81 from the head lining 92A is small. The deformation of the attachment portion 81 is also suppressed. Therefore, damage to the attachment portion 81 is reduced.
　以上説明したように、本実施形態によれば、エアバッグ１０が膨張展開するときに、アシストグリップ８０が受けるダメージを低減でき、アシストグリップ８０の破損を防止でき、アシストグリップ８０が車体９９から取れるのも防止できる。近接気室４０Ａ～４０Ｃをアシストグリップ８０の取付部８１に近接して配置することで、破損し易い取付部８１を保護できる。その結果、アシストグリップ８０の破損を、より確実に防止できる。 As described above, according to this embodiment, when the airbag 10 is inflated and deployed, damage to the assist grip 80 can be reduced, damage to the assist grip 80 can be prevented, and the assist grip 80 can be taken from the vehicle body 99. Can also be prevented. By disposing the proximity air chambers 40A to 40C close to the attachment portion 81 of the assist grip 80, the attachment portion 81 that is easily damaged can be protected. As a result, damage to the assist grip 80 can be prevented more reliably.
　中間膨張部４２により、エアバッグ１０と近接気室４０Ａ～４０Ｃが車室Ｓ内に迅速に展開する。これにより、アシストグリップ８０に近接する位置で、近接気室４０Ａ～４０Ｃの膨張を抑制できる。ヘッドライニング９２Ａの変形も、より小さくなる。中間膨張部４２と流通部４３により、ガスがガス流入口４１Ａ～４１Ｃまで達するのが遅くなる。また、アシストグリップ８０の近傍で、ガスの勢いが、より低下するとともに、近接気室４０Ａ～４０Ｃの膨張速度が更に遅くなる。従って、アシストグリップ８０の破損を確実に防止できる。流通部４３をエアバッグ１０内の下方の端部に設けるときには、先に膨張するエアバッグ１０の下部により、膨張前の近接気室４０Ａ～４０Ｃが強く引っ張られる。近接気室４０Ａ～４０Ｃは、より迅速に車室Ｓ内に展開する。 The airbag 10 and the proximity air chambers 40A to 40C are rapidly deployed in the vehicle interior S by the intermediate inflating portion 42. Thereby, expansion of the proximity air chambers 40A to 40C can be suppressed at a position close to the assist grip 80. The deformation of the headlining 92A is also smaller. Due to the intermediate expansion part 42 and the flow part 43, the gas reaches the gas inlets 41A to 41C later. Further, in the vicinity of the assist grip 80, the gas momentum is further reduced and the expansion speed of the proximity air chambers 40A to 40C is further decreased. Therefore, damage to the assist grip 80 can be reliably prevented. When the circulation part 43 is provided at the lower end of the airbag 10, the proximity air chambers 40A to 40C before being inflated are strongly pulled by the lower part of the airbag 10 that has been inflated first. The proximity air chambers 40A to 40C are deployed in the passenger compartment S more quickly.
　アシストグリップ８０に近接する内部接合部１６、１７により、膨張後のエアバッグ１０を薄くすることができる。アシストグリップ８０に近接する位置で、エアバッグ１０の厚さが減少するため、アシストグリップ８０が受けるダメージを、より低減できる。第１の内部接合部１６が、アシストグリップ８０の取付部８１に近接して配置されることにより、取付部８１を保護できるため、アシストグリップ８０の破損を効果的に防止できる。 The inflated airbag 10 can be thinned by the internal joints 16 and 17 close to the assist grip 80. Since the thickness of the airbag 10 decreases at a position close to the assist grip 80, damage to the assist grip 80 can be further reduced. Since the first internal joint portion 16 is disposed in the vicinity of the attachment portion 81 of the assist grip 80, the attachment portion 81 can be protected, so that the assist grip 80 can be effectively prevented from being damaged.
　なお、近接気室４０Ａ～４０Ｃ内に、基布１３、１４を接合した接合部を設けるようにしてもよい。その際、接合部を、近接気室４０Ａ～４０Ｃのアシストグリップ８０に近接する部分に設けることで、アシストグリップ８０に近接するエアバッグ１０の膨張を抑制できる。１つ又は２つの近接気室を、アシストグリップ８０に近接して配置するようにしてもよい。４つ以上の近接気室を、アシストグリップ８０に近接して配置してもよい。アシストグリップ８０の複数の取付部８１に、それぞれ複数の近接気室を近接させてもよい。 In addition, you may make it provide the junction part which joined the base fabrics 13 and 14 in the proximity | contact air chambers 40A-40C. At this time, by providing the joint portion in the proximity air chambers 40A to 40C close to the assist grip 80, the inflation of the airbag 10 close to the assist grip 80 can be suppressed. One or two proximity air chambers may be arranged in proximity to the assist grip 80. Four or more close air chambers may be arranged in close proximity to the assist grip 80. A plurality of proximity air chambers may be brought close to the plurality of attachment portions 81 of the assist grip 80, respectively.
　基布１３、１４を外縁接合部１５で縫製のみにより接合して、エアバッグ１０を形成してもよい。エアバッグ１０は、ジャカード織により形成してもよい。ジャカード織でエアバッグ１０を形成するときには、膨張部３０は、エアバッグ１０のジャカード織りした布の間に形成される。エアバッグ１０の対向する布が、互いの間に膨張部３０を形成する。対向する布が接合された内部接合部により、近接気室が膨張部３０に形成される。 The airbag 10 may be formed by joining the base fabrics 13 and 14 only by sewing at the outer edge joint portion 15. The airbag 10 may be formed of jacquard weave. When the airbag 10 is formed by jacquard weaving, the inflatable portion 30 is formed between the jacquard woven fabrics of the airbag 10. The fabrics facing each other of the airbag 10 form an inflatable portion 30 therebetween. A close air chamber is formed in the inflatable portion 30 by the internal joint portion where the opposing fabrics are joined.
　１・・・エアバッグ装置、２・・・インフレータ、２Ａ・・・噴出口、１０・・・エアバッグ、１１・・・前方部、１３・・・表基布、１４・・・裏基布、１５・・・外縁接合部、１６～１９・・・内部接合部、２０・・・連結ベルト、２１～２６・・・固定布、２７・・・ガス供給部、２８・・・近接部、３０・・・膨張部、３１・・・前膨張部、３２・・・後膨張部、３３・・・連結膨張部、３４・・・非膨張部、３５～３９・・・気室、４０Ａ～４０Ｃ・・・近接気室、４１Ａ～４１Ｃ・・・ガス流入口、４２・・・中間膨張部、４３・・・流通部、８０・・・アシストグリップ、８１・・・取付部、８１Ａ・・・突起、８２・・・掴み部、８８・・・固定部材、９０・・・車両、９１・・・側壁、９２・・・ルーフレール、９２Ａ・・・ヘッドライニング、９３・・・フロントピラー、９３Ａ・・・フロントピラートリム、９４・・・センターピラー、９５・・・前部ドア、９６・・・後部ドア、９７、９８・・・窓、９９・・・車体、Ｓ・・・車室。 DESCRIPTION OF SYMBOLS 1 ... Airbag apparatus, 2 ... Inflator, 2A ... Spout, 10 ... Airbag, 11 ... Front part, 13 ... Front base fabric, 14 ... Back base fabric 15 ... outer edge joints, 16-19 ... internal joints, 20 ... connection belt, 21-26 ... fixed cloth, 27 ... gas supply part, 28 ... proximity part, 30 ... Inflating part, 31 ... Front inflating part, 32 ... Rear inflating part, 33 ... Connected inflating part, 34 ... Non-inflating part, 35-39 ... Air chamber, 40A ~ 40C: proximity air chamber, 41A to 41C ... gas inlet, 42 ... intermediate expansion part, 43 ... circulation part, 80 ... assist grip, 81 ... attachment part, 81A ...・ Protrusions 82... Grabbing part 88... Fixing member 90 .. vehicle 91 .. side wall 92 .. roof rail 92A ..Head lining, 93 ... Front pillar, 93A ... Front pillar trim, 94 ... Center pillar, 95 ... Front door, 96 ... Rear door, 97, 98 ... Window, 99 ... body, S ... cab.

Claims (8)

  1. 　車室内の上部にアシストグリップの取付部が取り付けられた車両に搭載されるエアバッグ装置であって、
    　アシストグリップに近接する位置で膨張する近接気室を有し、車室内の上部に配置されるエアバッグと、
    　ガスを発生してエアバッグを下方に向かって膨張展開させるインフレータと、を備え、
    　近接気室が、近接気室の下方の端部にガス流入口を有し、ガス流入口のみからガスが流入して膨張するエアバッグ装置。     An airbag device mounted on a vehicle having an assist grip mounting portion attached to an upper portion of a vehicle interior,
    An air bag that has a close air chamber that is inflated at a position close to the assist grip, and is disposed at an upper portion of the vehicle interior;
    An inflator that generates gas to inflate and deploy the airbag downward,
    An airbag device in which a near air chamber has a gas inlet at a lower end of the near air chamber, and gas is introduced only from the gas inlet and is expanded.
  2. 　請求項１に記載されたエアバッグ装置において、
    　エアバッグが、インフレータが発生するガスをエアバッグ内へ供給するガス供給部と、近接気室の下方に設けられてガス流入口までガスを流通させる流通部と、ガス供給部と流通部の間で膨張する中間膨張部とを有するエアバッグ装置。     In the airbag apparatus described in Claim 1,
    A gas supply part that supplies the gas generated by the inflator into the airbag, a circulation part that is provided below the proximity air chamber and distributes the gas to the gas inlet, and between the gas supply part and the circulation part An airbag device having an intermediate inflatable portion that is inflated with the air bag.
  3. 　請求項２に記載されたエアバッグ装置において、
    　流通部が、エアバッグ内の下方の端部に設けられたエアバッグ装置。     In the airbag apparatus described in Claim 2,
    An airbag apparatus in which a circulation part is provided at a lower end portion in an airbag.
  4. 　請求項１ないし３のいずれかに記載されたエアバッグ装置において、
    　近接気室が、アシストグリップの取付部に近接して配置されるエアバッグ装置。     In the airbag apparatus as described in any one of Claim 1 thru | or 3,
    An airbag device in which the proximity air chamber is disposed in proximity to the mounting portion of the assist grip.
  5. 　請求項１ないし４のいずれかに記載されたエアバッグ装置において、
    　エアバッグが、アシストグリップに近接して配置される複数の近接気室を有するエアバッグ装置。     In the airbag apparatus as described in any one of Claim 1 thru | or 4,
    An airbag device having a plurality of proximity air chambers in which an airbag is disposed in proximity to an assist grip.
  6. 　請求項５に記載されたエアバッグ装置において、
    　複数の近接気室が、アシストグリップの１つの取付部に近接して配置されるエアバッグ装置。     In the airbag apparatus described in Claim 5,
    An airbag device in which a plurality of proximity air chambers are arranged in proximity to one mounting portion of the assist grip.
  7. 　請求項１ないし６のいずれかに記載されたエアバッグ装置において、
    　エアバッグが、互いの間に膨張部を形成する対向する布と、対向する布を接合して膨張部に近接気室を形成する接合部とを有し、
    　接合部が、アシストグリップに近接して配置されるエアバッグ装置。     In the airbag apparatus described in any one of Claims 1 thru | or 6,
    The airbag has opposing fabrics that form an inflating portion between each other, and a joining portion that joins the opposing fabrics to form a near air chamber in the inflating portion,
    An airbag device in which the joint portion is disposed in proximity to the assist grip.
  8. 　請求項７に記載されたエアバッグ装置において、
    　接合部が、アシストグリップの取付部に近接して配置されるエアバッグ装置。     In the airbag apparatus described in Claim 7,
    An airbag device in which a joint portion is disposed close to an attachment portion of an assist grip.
PCT/JP2012/072240 2011-09-09 2012-08-31 Airbag device WO2013035648A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-197448 2011-09-09
JP2011197448A JP5792006B2 (en) 2011-09-09 2011-09-09 Curtain airbag device

Publications (1)

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WO2013035648A1 true WO2013035648A1 (en) 2013-03-14

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002029360A (en) * 2000-07-19 2002-01-29 Toyoda Gosei Co Ltd Air bag for air bag device for protecting head part
JP2010201998A (en) * 2009-03-02 2010-09-16 Ashimori Ind Co Ltd Airbag device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5201089B2 (en) * 2009-06-22 2013-06-05 豊田合成株式会社 Head protection airbag device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002029360A (en) * 2000-07-19 2002-01-29 Toyoda Gosei Co Ltd Air bag for air bag device for protecting head part
JP2010201998A (en) * 2009-03-02 2010-09-16 Ashimori Ind Co Ltd Airbag device

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JP5792006B2 (en) 2015-10-07

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