JP4770778B2 - Curtain airbag device - Google Patents

Description

  The present invention relates to a curtain airbag device in which a gas is ejected from an inflator at the time of a side collision or rollover of an automobile, and an airbag is deployed in a curtain shape from a pillar portion along a roof side portion by this gas.

  2. Description of the Related Art In recent years, a curtain airbag that deploys an airbag in the form of a curtain below a roof side portion has been mounted as an occupant protection auxiliary device for an automobile at the time of a side collision or rollover. Further, a curtain airbag device that can be deployed between the head of an occupant seated in an automobile seat and the side of the vehicle body to protect the occupant's head has already been known.

Here, Patent Documents 1 and 2 below disclose this type of curtain airbag device. Briefly, in these curtain airbag devices, depending on how the airbag is folded, when the airbag is deployed, the airbag is deployed toward the inner side of the vehicle interior so that it catches on the upper end of the B pillar garnish. Is preventing.
Japanese Patent No. 3329277 JP 2005-510390 A

  However, in the curtain airbag device, the folded shape of the airbag extends over the entire length of the airbag, and the airbag catches on the upper end of the B-pillar garnish or C-pillar garnish (hereinafter simply referred to as the pillar garnish) when the airbag is deployed. If it is shaped so as to be separated from the side surface of the passenger compartment so as to be difficult, the airbag will be easily caught on the A pillar garnish opened from the lower side along the side surface of the passenger compartment, and it will be difficult to deploy outside the passenger's head. Airbag deployment completion time is delayed.

  On the other hand, if the folded shape of the airbag is a shape that extends downward along the side of the passenger compartment where the airbag does not easily catch on the A-pillar garnish when the airbag is deployed, the airbag is formed of the pillar garnish. It becomes easy to get caught in the upper end. As a countermeasure, it is conceivable that the airbag is less likely to be caught on the upper end of the pillar garnish by setting a jump stand on the roof side rail or by setting the upper end of the pillar garnish downward. However, when the jump stand is set on the roof side rail, it is necessary to provide the jump stand with a deployment guide cloth or the like for guiding the airbag to be deployed to the vehicle interior side, which increases the number of parts. Also, if the upper end of the pillar garnish is set downward, the shape of the molded ceiling becomes complicated, the efficiency of creating the molded ceiling is poor, design restrictions are increased, and the mounting portion provided on the upper end of the pillar garnish is It interferes with the seat belt shoulder anchor adjuster slide plate.

  In consideration of the above facts, the present invention improves the deployment performance of the airbag in the portion covered by the front pillar garnish, and the airbag in the middle of deployment is located at the upper end of the pillar garnish of the rear pillar located behind the front pillar. An object of the present invention is to obtain a curtain airbag device that can be prevented from being caught.

  According to a first aspect of the present invention, there is provided a curtain airbag device according to the present invention, wherein each pillar includes a front pillar and a gas supplied through a gas introduction path provided between a rear pillar located on the rear side of the vehicle from the front pillar and a roof side. An airbag that extends in a curtain shape across the roof side, a front pillar garnish that constitutes a vehicle interior side portion of the front pillar, and a vehicle interior side portion of the rear pillar, the upper end portion of which is in a retracted state The rear pillar garnish located in the deployment direction of the airbag below the airbag deployment direction side, and a portion covered with the front pillar garnish in the gas introduction path, the gas introduction path It is offset upward with respect to other parts, and it is placed inside the folded airbag. That the front pillar gas introducing passage has a, characterized in that arranged in the vehicle exterior side of the folded airbag the other portions of the gas introducing path.

  When the airbag is deployed, the airbag is curtained over each pillar and roof side by the gas supplied through the front pillar and the gas introduction path provided between the rear pillar located behind the front pillar and the roof side. Expands into a shape. At this time, the part covered by the front pillar garnish in the gas introduction path of the folded airbag is a front pillar gas introduction path that is offset upward with respect to other parts, and this front pillar gas introduction path is It is arrange | positioned at the vehicle interior side of the folded airbag. For this reason, in the part of the airbag covered with the front pillar garnish when the airbag is deployed, the folded airbag is expanded and deployed on the cabin side of the airbag where the front pillar gas introduction path is folded. It is pushed outward and is smoothly pushed into the passenger compartment through a gap formed outside the passenger compartment at the lower end of the front pillar garnish.

  On the other hand, the other part of the gas introduction path including the part of the gas introduction path stored above the rear pillar garnish is disposed on the vehicle interior side of the folded airbag. For this reason, at the part of the airbag stored upward in the rear pillar garnish when the airbag is deployed, the rear pillar gas introduction path is inflated and deployed outside the airbag compartment so that the folded airbag Extruded in the direction. As a result, the portion of the airbag stored above the rear pillar garnish extends beyond the upper end portion of the rear pillar garnish and is deployed in the vehicle interior so as not to be caught by the upper end portion of the rear pillar garnish.

According to a second aspect of the present invention, there is provided a curtain airbag device according to the present invention, wherein each pillar includes a front pillar and a gas supplied through a gas introduction passage provided between a rear pillar located on the rear side of the vehicle from the front pillar and a roof side. An airbag that extends in a curtain shape across the roof side, a front pillar garnish that constitutes a vehicle interior side portion of the front pillar, and a vehicle interior side portion of the rear pillar, the upper end portion of which is in a retracted state The rear pillar garnish located in the deployment direction of the airbag below the airbag deployment direction side, and a portion covered with the front pillar garnish in the gas introduction path, the gas introduction path It is offset upward with respect to other parts, and it is placed inside the folded airbag. The front pillar gas introduction path and the part stored above the rear pillar garnish in the gas introduction path, which are offset downward with respect to other parts of the gas introduction path, and are folded And a rear pillar gas introduction path disposed outside the passenger compartment of the airbag.

  When the airbag is deployed, the airbag is curtained over each pillar and roof side by the gas supplied through the front pillar and the gas introduction path provided between the rear pillar located behind the front pillar and the roof side. Expands into a shape. At this time, the portion of the airbag gas introduction path covered by the pillar garnish of the front pillar is a front pillar gas introduction path that is offset upward with respect to other parts, and this front pillar gas introduction path is folded. The air bag is disposed on the vehicle interior side. For this reason, at the part of the airbag covered with the front pillar garnish when the airbag is deployed, the front pillar gas introduction path is inflated and deployed on the interior side of the interior of the airbag, so that the folded airbag is directed toward the exterior of the interior of the interior. It is pushed out and smoothly pushed out into the passenger compartment through a gap formed outside the passenger compartment at the lower end of the front pillar garnish.

  On the other hand, the part stored above the rear pillar garnish in the gas introduction path of the airbag is a rear pillar gas introduction path that is offset downward with respect to other parts, and this rear pillar gas introduction path is folded. It is arranged outside the passenger compartment of the airbag. For this reason, when the airbag is deployed, the airbag portion stored in the upper direction of the rear pillar garnish is inflated and deployed on the outer side of the airbag cabin so that the airbag is pushed out toward the interior of the cabin. Thus, the portion of the airbag stored above the rear pillar garnish extends into the vehicle interior so as not to be caught by the upper end of the rear pillar garnish beyond the upper end of the rear pillar garnish.

In the curtain airbag device of the present invention according to claim 1 or 2 , the deployment performance of the airbag in the portion covered by the front pillar garnish is improved, and the airbag in the middle of deployment is at the upper end of the rear pillar garnish. It can be suppressed from being caught.

  A curtain airbag device according to a first embodiment of the present invention will be described with reference to FIGS.

  In the figure, the arrow FR indicates the vehicle front direction, the arrow UP indicates the vehicle upward direction, and the arrow IN indicates the vehicle width direction inner side.

  FIG. 2 shows a side view of the air bag storage state of the curtain airbag device of the present embodiment as viewed from the vehicle interior side. In FIG. 2, the roof head lining and the front pillar garnish are omitted, and the airbag is shown in a two-dot chain line.

  As shown in FIG. 2, the airbag 20 of the curtain airbag device 10 of the present embodiment extends along the roof side rail 18 between the front pillar (A pillar) 12, the B pillar 14, the C pillar 16, and the D pillar 17. Are arranged in a folded state. Further, the inflator 22 of the curtain airbag device 10 has a substantially cylindrical shape, and is disposed and connected to the rear end of the airbag 20 in the longitudinal direction, and operates at the time of a side collision (or at the time of a side collision or rollover). Gas is spouted out.

  Attachment pieces 24 are formed at appropriate intervals on the upper edge 20F of the airbag 20, and these attachment pieces 24 are fastened to the roof side rail inner panel 41 of the roof side rail 18 by fastening members 25 such as bolts and weld nuts. By fixing, the airbag 20 is fixed to the body side.

  FIG. 6 shows a perspective view of the folded state of the airbag in the curtain airbag device of the present embodiment as viewed from the front outside the vehicle compartment.

  As shown in FIG. 6, the airbag 20 is wound on an outer roll (winding direction from the vehicle compartment side toward the vehicle compartment outer side in the upper portion of the airbag 20 as shown in FIG. 5). Further, the airbag 20 folded into a roll shape is formed in a folded state by partial wrapping by a wrap material 21 that is easily broken or by partial temporary fixing using a tape-shaped hook-and-loop fastener (not shown). Is retained. 6 indicates the perforation 21A formed in the wrap material 21, and the wrap material 21 is easily broken by the perforation 21A when the airbag is deployed.

  As shown in FIG. 2, the airbag 20 is inflated and deployed on the side of the head of the occupant seated on the front seat in the deployed state as shown by the two-dot chain line, and on the rear seat. A rear inflatable portion 20B that inflates and deploys on the side of the head of the seated occupant. Further, the inflator 22 for inflating and deploying the airbag 20 is fixed to the inner panel of the D pillar 17 by a bracket 23 by fastening members 27 such as bolts and weld nuts. Further, a gas ejection portion 22A of the inflator 22 is connected to the rear end portion 20C of the airbag 20.

  The inflator 22 is connected to an unillustrated airbag ECU (control means) disposed below the console box and the like, and a not-shown side collision detection sensor (means) disposed below the B pillar 14 and the like. Alternatively, when a side collision state or a rollover state is detected by a rollover detection sensor (means) (not shown) disposed in the airbag ECU or the like, it is energized and activated to generate gas.

  FIG. 5 is an enlarged cross-sectional view showing the airbag storage state of the portion along the 5-5 cross-sectional line in FIG.

  As shown in FIG. 5, the airbag 20 of the curtain airbag device 10 is covered on the vehicle interior side by the terminal portion 34 </ b> A of the roof head lining 34. That is, the terminal portion 34A in the vehicle width direction of the roof head lining 34 is bent downward from the general portion 34B to the vehicle lower side, and is elongated along the vehicle front-rear direction outside the vehicle compartment of the terminal portion 34A of the roof head lining 34. The airbag 20 folded into a shape is covered.

  FIG. 3 is an enlarged cross-sectional view showing a state in which the airbag is stored in the region along the line 3-3 in FIG.

  As shown in FIG. 3, in the retracted state (the state after assembly), the upper end portion (upper edge) 36A of the B pillar garnish 36 is overlapped from the vehicle interior side on the end edge of the terminal portion 34A of the roof head lining 34. Arranged in a state. Further, the upper end portion (upper edge) 36A of the B pillar garnish 36 is below the deployment direction side portion 20D of the airbag 20 in the retracted state and in the deployment direction of the airbag 20 (the direction of arrow Y in FIG. 3). positioned.

  The B pillar 14 is mainly composed of a B pillar inner panel 38 disposed on the vehicle interior side, and a B pillar portion 40A of a cylinder outer 40 that forms a closed cross-sectional structure with the B pillar inner panel 38. Further, the roof side rail 18 extends along the vehicle front-rear direction on the vehicle interior side of the roof side rail portion 40B of the cylinder outer 40.

  The roof side rail 18 is a closed side that extends in the vehicle front-rear direction by a roof side rail inner panel 41 that constitutes the vehicle interior side portion of the roof side rail 18 and a roof side rail outer panel 43 that constitutes the vehicle exterior side portion of the roof side rail 18. The upper end portion 38A of the B pillar inner panel 38 is joined to the side surface of the vehicle interior of the lower portion 41A of the roof side rail inner panel 41 by spot welding or the like.

  Further, on the upper surface of the coupling flange 18A formed at the upper part of the roof side rail 18, an outer edge in the vehicle width direction of the roof panel 45 is sandwiched by an inner edge 40C in the vehicle width direction of the roof side rail portion 40B in the outer outer 40. 45A is coupled by spot welding or the like.

  The B pillar garnish 36 is provided on the vehicle interior side of the B pillar inner panel 38 along the vehicle vertical direction. In this embodiment, the B pillar garnish 36 is made of resin, but the B pillar garnish 36 is made of a resin base material and a skin covering the surface of the base material on the vehicle interior side. Also good.

  The principal part of the curtain airbag device of this embodiment is shown in FIG. 7 in a perspective view as seen from the vehicle interior diagonally forward.

  As shown in FIG. 7, the B pillar garnish 36 has a substantially U-shaped flat cross-sectional shape, and a main wall portion 36B along the side surface of the vehicle interior and a vehicle width direction from the front edge of the main wall portion 36B. The front wall portion 36C is bent outward and the rear wall portion 36D is bent outward from the rear edge of the main wall portion 36B in the vehicle width direction.

  A mounting piece 36E is formed at the vehicle longitudinal direction central portion in the vicinity of the upper end of the main wall portion 36B toward the vehicle compartment outside. The attachment piece 36E has a flat plate shape, and an attachment portion 36F is formed at the outer end in the vehicle width direction toward the vehicle lower side.

  As shown in FIG. 3, a mounting hole 42 is formed in the mounting portion 36 </ b> F of the B pillar garnish 36, and a mounting hole 44 is formed in the upper portion 38 </ b> B of the B pillar inner panel 38. A clip 48 is inserted into the mounting hole 42 of the B-pillar garnish 36 and the mounting hole 44 of the B-pillar inner panel 38 from the vehicle interior side direction toward the vehicle exterior side direction. 36F is fixed to the upper part 38B of the B pillar inner panel 38 by a clip 48.

  As shown in FIG. 2, a shoulder anchor adjuster 51 is provided on the upper portion of the B pillar garnish 36, and the shoulder anchor 54 of the seat belt 52 can be moved in the vehicle vertical direction by the shoulder anchor adjuster 51. . A slide plate 56 of a shoulder anchor adjuster 51 is provided on the outer side surface of the main wall portion 36B of the B pillar garnish 36.

  As shown in FIG. 7, the slide plate 56 is formed of a belt-like plate material whose longitudinal direction is the vehicle vertical direction, and the upper end 56 </ b> A is located near the lower part of the attachment piece 36 </ b> E of the B pillar garnish 36. Further, the slide plate 56 is movable upward (in the direction of arrow A in FIG. 7) and downward (in the direction of arrow B in FIG. 7) with respect to the B pillar garnish 36, and to the highest position above the vehicle. Even when the slide plate 56 moves, the upper end 56A of the slide plate 56 does not interfere with the mounting piece 36E of the B pillar garnish 36.

  As shown in FIG. 3, an upper wall portion 36 </ b> G is formed from the middle in the vehicle width direction of the attachment piece 36 </ b> E of the B pillar garnish 36 toward the vehicle interior side upward. Further, a guide wall portion 36H as an air bag guide means (jump base) is formed from the upper end of the upper wall portion 36G obliquely upward to the outside of the vehicle compartment, and an airbag is formed on the vehicle interior side of the guide wall portion 36H. 20 is arranged. The airbag 20 and the guide wall portion 36H may be in contact with each other or separated from each other.

  The guide wall portion 36H extends from the vehicle width outer side upper side toward the vehicle interior side lower side, and guides the airbag 20 to be deployed to the vehicle interior side.

  As shown in FIG. 7, the front end 36J of the guide wall 36H is at the same position as the front end 36K of the mounting piece 36E, and the rear end 36L of the guide wall 36H is at the same position as the rear end 36M of the mounting piece 36E. ing. The front end 36J of the guide wall portion 36H is located on the vehicle rear side from the upper end of the front wall portion 36C of the B pillar garnish 36, and the rear end 36L of the guide wall portion 36H is formed on the rear wall portion 36D of the B pillar garnish 36. It is located on the vehicle front side from the upper end.

  FIG. 1 is a plan view showing an airbag before folding in the curtain airbag device of the present embodiment. In FIG. 1, in order to show the positional relationship between the airbag 20 and the side surface on the vehicle interior side, the corresponding position of each pillar is indicated by a two-dot chain line.

  As shown in FIG. 1, a gas introduction path 50 is provided in the upper part of the airbag 20 across the front pillar 12, the B pillar 14, the C pillar 16, the D pillar 17, and the roof side rail 18, and the inflator 22. The gas from (refer to FIG. 2) is supplied to the front expansion part 20A and the rear expansion part 20B through the gas introduction path 50.

  A portion of the gas introduction path 50 that is stored in the upper part of the front pillar 12 is a front pillar gas introduction path 62. The central axis L1 of the front pillar gas introduction path 62 is in the airbag 20 with respect to the central axis L2 of the other part 50A in the gas introduction path 50 of the airbag 20 (part on the vehicle rear side from the front pillar gas introduction path 62). Is offset upward. That is, when the airbag 20 is manufactured, an inclined gas introduction path 64 that is inclined toward the upper edge 20F side obliquely forward is formed in the front portion of the gas introduction path 50, and from the front end of the inclined gas introduction path 64 A front pillar gas introduction path 62 is formed toward the front of the vehicle.

  The central axis of the gas introduction path 50 is a line along the center in the vertical direction of the gas introduction path 50 in the airbag 20 before folding shown in FIG.

  In addition, the inclination angle α1 of the inclined gas introduction path 64 is set to a predetermined angle or less so as not to reduce the gas flow in the gas introduction path 50.

  FIG. 4 is an enlarged cross-sectional view showing a state in which the airbag is housed along a 4-4 cross-sectional line in FIG.

  As shown in FIG. 4, the front pillar 12 includes a front pillar inner panel 70 that forms a side part of the vehicle interior, and a front of the cylinder outer 40 that forms a closed cross-sectional structure with the front pillar inner panel 70 that forms the outside part of the vehicle interior. The pillar part 40D and the front pillar reinforcement 72 arranged in the closed cross-sectional structure are configured as main parts.

  A front pillar garnish 74 is provided on the vehicle interior side of the front pillar inner panel 70. The front pillar garnish 74 is front-mounted by a clip 76 provided on a top 74C of a mounting seat 74B standing on the vehicle exterior side surface 74A. It is attached to the pillar inner panel 70. In this embodiment, the front pillar garnish 74 is made of a resin, but the front pillar garnish 74 is made of a resin base material and a skin covering the surface of the base material on the vehicle interior side. Also good.

  When the airbag 20 is deployed, the lower end portion 74D of the front pillar garnish 74 is disengaged from the weather strip 78 provided on the front pillar 12 by the deployment force of the airbag 20, and is shown by a two-dot chain line in FIG. It pushes and opens in the vehicle interior side direction (arrow E direction in FIG. 4). At this time, the airbag 20 is folded so as to be deployed obliquely outward and downward (in the direction of arrow F in FIG. 4) as indicated by a two-dot chain line in FIG.

  On the other hand, the portion of the airbag 20 where the front pillar gas introduction passage 62 is formed is disposed on the vehicle interior side 20E of the airbag 20 that is largely folded into a roll shape. The front pillar gas introduction path 62 includes a folded portion 62A from above to below and a folded portion 62B from below to above.

  Note that most of the portion 20H of the airbag 20 where the front pillar gas introduction path 62 is not formed is disposed on the outer side 20G of the airbag 20 folded in a roll shape.

  That is, the upper part of the airbag 20 in which the gas introduction path 50 is formed is folded twice by the folding lines P1 and P2 shown in FIG. 1, and the airbag 20 is uniform over the entire length (after the roll folding, the folding is performed twice. ).

  Therefore, at the initial stage of airbag deployment, the folded-back portions 62A and 62B provided on the vehicle interior side 20E of the airbag 20 folded in a roll shape are inflated and deployed, so that the airbag 20 is in the direction toward the exterior of the vehicle interior (see FIG. 4). It is pushed out in the direction of arrow F). For this reason, the airbag 20 at the initial stage of deployment easily passes through the opening 80 formed on the outer side of the passenger compartment at the lower end 74D of the front pillar garnish 74 and is deployed in the passenger compartment.

  As shown in FIG. 1, the portion of the gas introduction path 50 that is stored above the B pillar 14 is a B pillar gas introduction path 82, and the central axis L <b> 3 of the B pillar gas introduction path 82 is the gas introduction of the airbag 20. This coincides with the central axis L2 of the other part 50A in the path 50.

  As shown in FIG. 3, the portion of the airbag 20 where the B pillar gas introduction path 82 is formed is disposed on the vehicle interior outside 20G of the airbag 20 folded in a roll shape, and the B pillar gas introduction path is formed. 82 forms a folded portion 82A from above to below and a folded portion 82B from below to above. Note that most of the portion 20L of the airbag 20 where the B pillar gas introduction path 82 is not formed is disposed on the vehicle interior side 20E of the airbag 20 folded in a roll shape.

  Therefore, at the initial stage of airbag deployment, the folded portions 82A and 82B provided on the outer side 20G of the airbag 20 folded in a roll shape are inflated and deployed, so that the folded airbag 20 is in the direction toward the interior of the vehicle ( It is pushed out in the direction of arrow J in FIG. For this reason, the airbag 20 at the initial stage of deployment easily passes above the upper end portion 36A of the B pillar garnish 36 as shown by a two-dot chain line in FIG.

  When the airbag 20 is deployed, the terminal portion 34A of the roof head lining 34 is pushed and opened in the vehicle interior direction (the direction of arrow K in FIG. 3) by the deployment force of the airbag 20. At this time, since the upper end portion 36A of the B pillar garnish 36 is disposed on the terminal portion 34A of the roof head lining 34 so as to overlap from the vehicle interior side, the upper end portion 36A of the B pillar garnish 36 is also pressed toward the vehicle interior side. However, since the attachment portion 36F of the B pillar garnish 36 is fixed to the upper portion 38B of the B pillar inner panel 38 by the clip 48, the end portion 34A of the roof head lining 34 is fixed to the upper end of the B pillar garnish 36. It deviates from the part 36A and expands in the vehicle interior side direction (arrow K direction in FIG. 3).

  As shown in FIG. 1, a portion of the gas introduction path 50 that is stored above the C pillar 16 is a C pillar gas introduction path 86. The central axis L4 of the C pillar gas introduction path 86 coincides with the central axis L2 of the other part 50A in the gas introduction path 50 of the airbag 20.

  Although not shown, the C pillar gas introduction path 86 is also stored in a folded state in the same manner as the B pillar gas introduction path 82.

  Next, the operation of this embodiment will be described.

  In the present embodiment, when a side collision or rollover is detected by the sensor, the inflator 22 is activated and a predetermined amount of gas is ejected from the inflator 22. As a result, the airbag 20 starts to be deployed, and the deployed airbag 20 can open and close the terminal portion 34A of the roof head lining 34 toward the vehicle interior side as shown by a two-dot chain line in FIG. 18 is expanded and deployed in a curtain shape from the rear side of the vehicle toward the front side of the vehicle.

  Further, as shown by a two-dot chain line in FIG. 4, the airbag 20 to be deployed pushes and opens the front pillar garnish 74 in the vehicle interior side direction (the direction of arrow F in FIG. 4), and the vehicle rear side below the front pillar 12. It expands and deploys in the form of a curtain from the vehicle front side.

  At this time, as shown in FIG. 1, a portion of the gas introduction path 50 of the airbag 20 that is stored in the upper part of the front pillar 12 is a front pillar gas introduction path 62, and the central axis of the front pillar gas introduction path 62 L1 is offset above the airbag 20 with respect to the central axis L2 of the other part 50A in the gas introduction path 50 of the airbag 20. Further, as shown in FIG. 4, the front pillar gas introduction path 62 is disposed on the vehicle interior side 20E of the airbag 20 which is mostly folded in a roll shape.

  For this reason, in the initial stage of airbag deployment, the folded-back portions 62A and 62B provided on the vehicle interior side 20E of the airbag 20 folded in a roll shape are inflated and deployed, so that the airbag 20 is in the direction toward the vehicle compartment outer side (FIG. 4). In the direction of arrow F). As a result, the airbag 20 in the initial stage of deployment easily passes through the opening 80 formed outside the passenger compartment at the lower end 74D of the front pillar garnish 74 and deploys into the passenger compartment, so that the lower end of the front pillar garnish 74 is Without being caught by the portion 74D, the vehicle can be smoothly deployed into the vehicle compartment along the vehicle interior side surface of the upper portion of the front side door 13 (see FIG. 2).

  On the other hand, as shown in FIG. 1, the B pillar gas introduction path 82, which is a part of the gas introduction path 50 of the airbag 20 that is stored above the B pillar 14, has the gas introduction path 50 except for the front pillar gas introduction path 62. As shown in FIG. 3, most of the other portions are arranged on the outer side 20G of the airbag 20 folded in a roll shape, and the B pillar gas introduction path 82 is a folded portion 82A from the upper side to the lower side. And a folded portion 82B from below to above.

  For this reason, in the initial stage of deployment of the airbag, the folded portions 82A and 82B provided on the outer side 20G of the airbag 20 folded in a roll shape are inflated and deployed, so that the airbag 20 is in the direction toward the interior of the vehicle (FIG. 3). Is pushed in the direction of arrow J). As a result, the airbag 20 at the initial stage of deployment easily passes above the upper end portion 36A of the B pillar garnish 36 as shown by a two-dot chain line in FIG. That is, since the airbag 20 is not in contact with or caught on the upper end portion 36A of the B pillar garnish 36, it is possible to prevent problems such as the airbag 20 not being reliably deployed in the vehicle interior direction or the deployment timing being delayed. .

  Note that the same effect as above the B pillar 14 can be obtained above the C pillar 16.

  Therefore, in the present embodiment, the central axis L1 of the front pillar gas introduction path 62 is defined as the central axis L2 of the other part 50A in the gas introduction path 50 of the airbag 20 (the part on the vehicle rear side from the front pillar gas introduction path 62). Since the air bag 20 is offset upward with respect to the air bag 20, the front pillar gas introduction path 62 is folded into a roll shape even if the air bag 20 is folded uniformly over the entire length (after the roll is folded twice). It becomes the vehicle interior side 20E of the bag 20, and the B pillar gas introduction passage 82 and the C pillar gas introduction passage 86 are outside the compartment of the airbag 20 folded in a roll shape. For this reason, the deployment performance of the airbag 20 in the portion covered with the front pillar garnish 74 is improved, and the airbag 20 in the middle of deployment is the upper end portion 36A of the B pillar garnish 36 or the upper end portion of the pillar garnish 36 of the C pillar 16. It can be restrained from being caught on.

  Further, in the present embodiment, it is not necessary to provide a deployment guide cloth or the like for guiding the airbag 20 deployed on the guide wall portion 36H to the vehicle interior side, so that an increase in the number of components can be prevented. In the present embodiment, it is not necessary to set the upper end portion 36A of the B pillar garnish 36 downward. For this reason, the shape of the roof head lining 34 is simplified, the formation efficiency of the molded ceiling is good, the design restrictions are reduced, and the attachment piece 36E provided on the upper end portion 36A of the B pillar garnish 36 is provided with the shoulder anchor adjuster 51. There is no interference with the slide plate 56.

Next, a curtain airbag device according to a second embodiment as a reference example which is not the present invention will be described with reference to FIG.

  In addition, the same member as 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits the description.

  FIG. 8 is a plan view showing the airbag before folding in the curtain airbag device of the present embodiment. In FIG. 8, in order to show the positional relationship between the airbag 20 and the side surface on the vehicle interior side, the corresponding position of each pillar is indicated by a two-dot chain line.

  As shown in FIG. 8, in the present embodiment, the central axis L3 of the B pillar gas introduction path 82 which is a part stored above the B pillar 14 in the gas introduction path 50 is the other in the gas introduction path 50 of the airbag 20. This is offset downward of the airbag 20 with respect to the central axis L2 of the part 50A. That is, when the airbag 20 is manufactured, the inclined gas introduction path 88 that is inclined from the upper edge 20F side to the lower side of the airbag 20 at the both ends in the front-rear direction of the B pillar gas introduction path 82 in the gas introduction path 50 is provided. The B pillar gas introduction path 82 is formed between these inclined gas introduction paths 64 along the vehicle longitudinal direction.

  The inclination angle α2 of the inclined gas introduction path 88 is set to a predetermined angle or less so as not to reduce the gas flow in the gas introduction path 50.

  Further, in the state where the airbag 20 is folded as in the first embodiment, the portion of the airbag 20 where the B pillar gas introduction path 82 is formed is a vehicle compartment of the airbag 20 in which most of the portion is folded into a roll shape. Arranged on the outer side 20G.

  The C pillar gas introduction path 86, which is a part of the gas introduction path 50 that is stored above the C pillar 16, has the same configuration as the B pillar gas introduction path 82.

  On the other hand, the central axis L1 of the front pillar gas introduction path 62, which is a part stored in the upper part of the front pillar 12 in the gas introduction path 50, is equal to the central axis L2 of the other part 50A in the gas introduction path 50 of the airbag 20. I'm doing it.

  As in the first embodiment, when the airbag 20 is folded, the portion of the airbag 20 where the front pillar gas introduction path 62 is formed is a vehicle of the airbag 20 that is mostly folded in a roll shape. It arrange | positions at the indoor side 20E.

  Therefore, also in this embodiment, the same effect as the first embodiment can be obtained.

  Next, a third embodiment of the curtain airbag device of the present invention will be described with reference to FIG.

  In addition, the same member as 1st Embodiment or 2nd Embodiment attaches | subjects the same code | symbol, and abbreviate | omits the description.

  As shown in FIG. 9, in the present embodiment, the central axis L <b> 1 of the front pillar gas introduction path 62, which is a part stored in the upper part of the front pillar 12 in the gas introduction path 50, is in the gas introduction path 50 of the airbag 20. It is offset above the airbag 20 with respect to the central axis L2 of the other portion 50A (excluding the B pillar gas introduction passage 82 and the C pillar gas introduction passage 86).

  In addition, in the state which folded the airbag 20 similarly to 1st Embodiment or 2nd Embodiment, most the site | parts in which the front pillar gas introduction path 62 of the airbag 20 was formed were folded in roll shape. The air bag 20 is disposed on the vehicle interior side 20E.

  On the other hand, the central axis L3 of the B pillar gas introduction path 82, which is a part of the gas introduction path 50 that is stored above the B pillar 14, is another part 50A (front pillar gas introduction path 62) of the gas introduction path 50 of the airbag 20. Is offset downward of the airbag 20 with respect to the central axis L2.

  In addition, in the state which folded the airbag 20 similarly to 1st Embodiment or 2nd Embodiment, the site | part in which the B-pillar gas introduction path 82 of the airbag 20 was formed is mostly the air folded by roll shape. The bag 20 is disposed outside the vehicle compartment 20G.

  The C pillar gas introduction path 86, which is a part of the gas introduction path 50 that is stored above the C pillar 16, has the same configuration as the B pillar gas introduction path 82.

  Therefore, also in this embodiment, the same effect as the first embodiment can be obtained.

  In the above, the present invention has been described in detail for specific embodiments. However, the present invention is not limited to the above-described embodiments, and various other embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art. For example, in each of the embodiments described above, the airbag 20 is folded in the outer roll winding, but the airbag 20 may be folded in another folding manner such as reverse rotation inner roll winding or bellows folding.

  In each of the above embodiments, the front end 36J of the guide wall portion 36H is positioned on the vehicle rear side from the upper end of the front wall portion 36C of the B pillar garnish 36, and the rear end 36L of the guide wall portion 36H is positioned behind the B pillar garnish 36. Instead of this, the front end 36J of the guide wall 36H is positioned on the front side of the vehicle from the upper end of the front wall 36C of the B pillar garnish 36. The rear end 36L of the wall portion 36H may be positioned on the vehicle rear side from the upper end of the rear wall portion 36D of the B pillar garnish 36.

  Moreover, in each said embodiment, although the type with which the inflator 22 is arrange | positioned at the front-back direction rear-end part of the airbag 20 is employ | adopted, the inflator 22 is the front-back direction front end part of the airbag 20, the front-back direction center part, etc. It is good also as a structure arrange | positioned in another position.

It is a top view which shows the airbag before folding of the curtain airbag apparatus which concerns on 1st Embodiment of this invention. It is the side view seen from the vehicle interior side which shows the storing state of the airbag of the curtain airbag apparatus which concerns on 1st Embodiment of this invention. It is an expanded sectional view which shows the airbag accommodation state of the site | part along the 3-3 sectional line of FIG. FIG. 4 is an enlarged cross-sectional view showing a state in which the airbag is stored in a region along the 4-4 cross-sectional line in FIG. 2. FIG. 5 is an enlarged cross-sectional view showing a state in which the airbag is stored in a region along a 5-5 cross-sectional line in FIG. 2. It is the perspective view seen from the vehicle compartment outer side front which shows the folding state of the airbag of the curtain airbag device concerning a 1st embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a main part of a curtain airbag device according to a first embodiment of the present invention from an obliquely forward inner side of a vehicle. It is a top view which shows the airbag before folding of the curtain airbag apparatus which concerns on 2nd Embodiment as a reference example which is not this invention. It is a top view which shows the airbag before folding of the curtain airbag apparatus which concerns on 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Curtain airbag apparatus 12 Front pillar 14 B pillar 16 C pillar 18 Roof side rail 20 Air bag 22 Inflator 36 B pillar garnish 36A Upper end part of B pillar garnish 50 Air bag gas introduction path 50A Other parts of gas introduction path 62 Front pillar gas introduction path 62A Front pillar gas introduction path folded part 62B Front pillar gas introduction path folded part 64 Inclined gas introduction path 74 Front pillar garnish 82 B pillar gas introduction path 82A B pillar gas introduction path folded part 86 C pillar gas introduction path 88 Inclined gas inlet

Claims (2)

A front pillar and an airbag that is deployed in a curtain shape over each pillar and the roof side by a gas supplied through a gas introduction path that is provided between the rear pillar and the roof side located behind the front pillar. ,
A front pillar garnish constituting a vehicle interior side portion of the front pillar;
A rear pillar garnish that constitutes a vehicle interior side portion of the rear pillar, and that is located in the deployment direction of the airbag below the airbag deployment direction side portion in the retracted state.
A portion of the gas introduction path that is covered with the front pillar garnish, is offset upward with respect to other parts of the gas introduction path, and is disposed on the vehicle interior side of the folded airbag A pillar gas introduction path;
A curtain airbag device characterized in that the other portion of the gas introduction path is disposed outside the folded airbag compartment. A front pillar and an airbag that is deployed in a curtain shape over each pillar and the roof side by a gas supplied through a gas introduction path that is provided between the rear pillar and the roof side located behind the front pillar. ,
A front pillar garnish constituting a vehicle interior side portion of the front pillar;
A rear pillar garnish that constitutes a vehicle interior side portion of the rear pillar, and that is located in the deployment direction of the airbag below the airbag deployment direction side portion in the retracted state.
A portion of the gas introduction path that is covered with the front pillar garnish, is offset upward with respect to other parts of the gas introduction path, and is disposed on the vehicle interior side of the folded airbag A pillar gas introduction path;
The part of the gas introduction path that is stored above the rear pillar garnish, is offset downward with respect to the other part of the gas introduction path, and is disposed outside the casing of the folded airbag. A rear pillar gas introduction path,
A curtain airbag device comprising:

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