JP2014091407A - Vehicle curtain air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle curtain air bag device capable of achieving both CSA development performance and head shock absorption performance without disposing any shock absorbing member separately from a resin case.SOLUTION: A vehicle curtain air bag device 10 includes a resin case 30 holding a CSA body 20 and fitted to a vehicle sheet metal body 50. The resin case 30 includes an abutment shape part 36 integrally formed so as to abut on a body sheet metal component 60 fixed to the sheet metal body 50. The abutment shape part 36 is formed into a penetrating structure 38 penetrated in a direction crossing the abutting direction on the body sheet metal component 60. The body sheet metal component 60 is an assist grip bracket 60. The inclusion of the resin case 30 improves CSA development performance. The abutment shape part 36 has the penetrating structure 38. Thus, when an occupant's head contacts a vehicle interior component, the abutment shape part 36 is distorted to lower a head shock value.

Description

  The present invention relates to a vehicle curtain airbag device having a resin case. In particular, the present invention relates to a curtain airbag device for a vehicle that achieves both a curtain airbag deployment performance and a head impact absorption performance of a resin case. Hereinafter, the curtain airbag is also referred to as “CSA”. CSA is an abbreviation for Curtain Shield Airbag.

  Patent document 1 is disclosing the CSA apparatus for vehicles which provided the resin case holding CSA folded with respect to CSA. The resin case improves the CSA deployment performance and prevents the CSA from bursting against the sharp edge of the vehicle sheet metal body or body sheet metal part.

  Patent Document 2 discloses a vehicle interior material in which a head impact value at the time of a secondary collision is reduced by providing a soft impact absorbing member that is separate from the resin case and protrudes further toward the vehicle interior side than the resin case. The structure is disclosed.

Japanese Patent No. 04343062

JP 2002-225658 A

  However, when the resin case is added as in Patent Document 1, the CSA deployment performance is improved, but the rigidity of the contact portion of the resin case with the body sheet metal part is high, so the head of the passenger hits the vehicle interior part. There is a trade-off that the head impact value increases due to the reaction force from the body sheet metal parts.

  In addition, when a soft impact absorbing member separate from the resin case is added as in Patent Document 2, a space for arranging the impact absorbing member must be secured, and the impact absorbing member is separate from the resin case. Problems such as increased costs due to body parts arise.

  An object of the present invention is a curtain air bag device for a vehicle provided with a resin case, which achieves both CSA deployment performance and head impact absorption performance without providing a separate shock absorbing member from the resin case. An object of the present invention is to provide a curtain airbag device for a vehicle.

The curtain airbag device for a vehicle of the present invention that achieves the above object takes the following modes.
A curtain airbag device for a vehicle according to a first aspect of the present invention includes a resin case that holds a folded curtain airbag main body and is attached to a sheet metal body of the vehicle. The resin case is integrally provided with a contact shape portion that can come into contact with a body sheet metal part fixed to the sheet metal body. The contact shape portion has a penetrating structure that penetrates in a direction intersecting (for example, orthogonal to) the contact direction with the body sheet metal part.

  In the curtain airbag device for a vehicle according to the second aspect of the present invention, in the curtain airbag device for a vehicle according to the first aspect, the body sheet metal part is an assist grip bracket.

  According to the curtain airbag device for a vehicle according to the first aspect of the present invention, the CSA body is deployed and inflated between the occupant head and the passenger compartment side at the time of a vehicle side collision or rollover, and the occupant's head Protect parts.

  Further, since the resin case is provided, the CSA main body is prevented from bursting against the sharp edge of the sheet metal body. Further, since the resin case is provided with a contact shape portion capable of coming into contact with the body sheet metal part fixed to the sheet metal body, it is possible to prevent the CSA body from bursting against the sharp edge of the body sheet metal part. In addition, excessive movement of the CSA body in the direction of the body sheet metal part is restricted by the contact shape part, and scattering of the body peripheral interior parts supported by the body sheet metal part by the expanding and expanding CSA body is prevented. These improve the deployment performance of the CSA body.

Further, since the abutting shape part has a through structure that penetrates in the direction intersecting with the contact direction with the body sheet metal part, the abutting shape part bends and impact energy is generated when the head of the occupant hits the vehicle interior part. It can absorb and reduce the head impact value due to the reaction force from the body sheet metal part.
As a result, both CSA deployment performance and head impact absorption performance can be achieved.

  Moreover, since the contact shape part is integrally set to the resin case, it is not necessary to provide a shock absorber separate from the resin case as in Patent Document 2. As a result, it is not necessary to secure a space for installing a separate shock absorber, and the cost can be reduced.

  According to the curtain airbag device for a vehicle according to the second aspect of the present invention, since the body sheet metal part is the assist grip bracket, the contact shape portion abuts on the assist grip bracket when the CSA is deployed and moves toward the assist grip bracket. Excessive movement of the CSA body is restricted. Thus, when the CSA body is inflated and deployed, the body peripheral interior parts supported by the assist grip bracket, that is, the assist grip, is prevented from being scattered by the CSA body.

It is the side view which removed the roof head lining of the site | part vicinity of an assist grip bracket in the state which attached the curtain airbag apparatus for vehicles which concerns on one Example of this invention to the sheet-metal body of the vehicle, and was seen from the vehicle interior side. FIG. 2 is an enlarged cross-sectional view taken along line 2-2 in FIG. It is a perspective view of the assist grip bracket vicinity site | part of the curtain airbag apparatus for vehicles among FIG. It is the side view seen from the compartment side of the curtain airbag device among FIG. It is sectional drawing which follows the 5-5 line of FIG. It is sectional drawing which follows the 6-6 line of FIG.

  A curtain airbag device for a vehicle according to an embodiment of the present invention will be described with reference to FIGS. In the figure, FR indicates the front in the vehicle front-rear direction, UP indicates the vehicle upper direction, and OUT indicates the vehicle width direction outer side.

  As shown in FIG. 1, a curtain airbag device 10 for a vehicle according to an embodiment of the present invention includes a CSA body 20 and a resin case 30 and is attached to a sheet metal body 50 of the vehicle. The body 50 is a sheet metal body that is press-punched and press-molded, and the edges are sharp edges that can be formed when the stamping is performed.

  The CSA body 20 includes a case of being made of cloth and resin-coated. The CSA body 20 has an inflating part and a non-inflating part. The CSA body 20 is folded along a non-expanded state, arranged along a roof side rail 52 that is a part of the sheet metal body 50, and attached to the roof side rail 52. The CSA body 20 may be folded in a bellows shape, or may be folded in a winding shape. 2 and 3 show a case where the CSA body 20 is folded in a winding shape. The CSA body 20 is inflated and deployed by an inflation gas supplied from an inflator (not shown) at the time of a side collision and rollover of the vehicle, and pushes the vehicle lateral end 82 of the roof head lining 80 toward the passenger compartment. Open and inflated between the occupant head and the vehicle side wall to protect the occupant head.

  In FIG. 2, the roof side rail 52 includes an inner panel 54, an outer panel 56, and a reinforcement 58. The roof head lining 80 is provided below the inner panel 54. The CSA body 20 and the resin case 30 are arranged in a space between the inner panel 54 and the roof head lining 80. On the inner panel 54, a body sheet metal part 60, for example, an assist grip bracket (because it is the same as the body sheet metal part, reference numeral 60) is fixed by spot welding or the like. The CSA body 20 and the resin case 30 are located obliquely below the body sheet metal part 60 so that the CSA body 20 can be deployed.

  The resin case 30 is made of an elastic resin material. The resin case 30 is provided to prevent the CSA body 20 from bursting against the sharp edges of the sheet metal body 50 and the body sheet metal part 60 fixed thereto when the CSA body 20 is inflated and deployed.

  The resin case 30 is provided by being divided into a plurality along the longitudinal direction of the CSA body 20. As shown in FIG. 2, the resin case 30 covers a part of the periphery of the cross section of the CSA body 20 from the side of the sheet metal body 50 and the body sheet metal part 60 in the circumferential direction of the cross section of the CSA body 20. The expansion and deployment direction is regulated to the side opposite to the sheet metal body 50 and the body sheet metal part 60.

  As shown in FIG. 1, the front portion 22 (the portion from the expansion gas introduction portion 22b to the front closest portion 22a of the front assist grip bracket 60A) of the expansion gas introduction direction from the inflator of the CSA body 20 is the expansion gas. It is a part that is prone to rampage by the introduced gas during introduction. In order to suppress this rampage, the resin case 30 has an expansion gas introduction direction front portion 22 on the outer periphery of the cross section of the CSA main body 20 in the resin case portion 32 corresponding to the expansion gas introduction direction front portion 22 of the CSA body. The sheet metal body 50 and the body sheet metal part 60 are covered over almost a half circumference.

  A tape 26 is wound around a part of the CSA body 20 in the longitudinal direction of the CSA body 20. In addition, a tape 28 is wound around the CSA body 20 and the resin case 30 covering the CSA body 20 and the resin case 30 around the CSA body 20 and the resin case 30. The CSA body 20 and the resin case 30 are assembled in advance, and are assembled to the vehicle in this state. When the CSA body 20 is inflated and deployed, the tapes 26 and 28 are broken at predetermined portions, and the CSA body 20 is not hindered from being inflated and deployed.

At a plurality of locations in the longitudinal direction of the CSA body 20, the CSA body 20 and the resin case 30 are both fixed to the sheet metal body 50 with a CSA attachment clip 70.
As shown in FIGS. 1 and 3, the front portion 22 of the CSA body 20 in the direction of gas introduction and the resin case portion 32 corresponding thereto (from the resin case portion corresponding to the portion 22 a of the CSA body 20 to the portion 22 b of the CSA body 20). The portion between the resin case portion corresponding to 1) is fixed to the sheet metal body 50 by the CSA attachment clip 70 in order to suppress the movement of the CSA body 20 when the expansion gas is introduced.

  The CSA body 20 and the resin case 30 are fixed by the CSA attachment clip 70 as follows. A tongue-like CSA tab 24 that protrudes in a direction perpendicular to the longitudinal direction of the CSA body 20 is provided at the end of the CSA body 20 in the folding direction. The resin case 30 is also formed with a resin case mounting portion 34 that protrudes in a direction perpendicular to the longitudinal direction of the resin case 30 at a position corresponding to the CSA tab 24. The resin case mounting portion 34 extends in parallel with the sheet metal body 50 and faces the sheet metal body 50, and a side wall portion 34 b that is bent from both ends in the width direction of the body facing portion 34 a and extends away from the sheet metal body 50. Have

  The CSA tab 24 and the resin case attachment portion 34 are provided with a clip insertion hole at the center thereof. The sheet metal body 50 is also provided with clip insertion holes at positions corresponding to the clip insertion holes of the CSA tab 24 and the resin case mounting portion 34. The CSA attachment clip 70 has a head portion and a leg portion. The leg portion is inserted into the clip insertion hole of the CSA tab 24 and the resin case attachment portion 34, and is further pushed into the clip insertion hole of the sheet metal body 50. The clip leg portion is provided with an elastic claw. When the elastic claw passes through the clip insertion hole of the sheet metal body 50, the elastic claw retracts. When the elastic claw passes through, the elastic claw returns to the original position and cannot be removed. 50. In this state, the CSA tab 24 and the resin case mounting portion 34 are sandwiched between the clip head and the sheet metal body 50 and are fixed to the sheet metal body 50.

  As shown in FIG. 1, the body sheet metal part 60, for example, the assist grip bracket 60 is fixed to the sheet metal body 50 with the expansion gas introduction direction front portion 22 and the resin case portion 32 corresponding to the expansion gas introduction direction front portion 22. It is located in the vicinity of the part, that is, in the vicinity of the CSA tab 24 and the resin case attachment part 34. However, the position of the body sheet metal part 60 and the positions of the CSA tab 24 and the resin case mounting portion 34 are shifted from each other in the vehicle longitudinal direction so as not to interfere with each other. Hereinafter, a case where the body sheet metal part 60 is the assist grip bracket 60 will be described as an example.

  As shown in FIG. 2, an assist grip 66 extending between a pair of brackets 60 is attached to an assist grip bracket (hereinafter also simply referred to as “bracket”) 60. The assist grip 66 can be rotated around an assist grip rotation center 68, for example. When used, it is taken out to the position indicated by a two-dot chain line in FIG. 2, and is spring-biased and stored in the recess 84 of the roof head lining 80 when not in use. A known structure can be used as the structure of the assist grip 66.

  The assist grip bracket 60 is a sheet metal part that is stamped and molded by a press. The bracket 60 is fixed to a vehicle body, for example, the inner panel 54 of the roof side rail 52 by spot welding. The assist grip bracket 60 has a bracket side wall 62 and a bracket bottom wall 64. The bracket side wall 62 is in a plane extending in the left-right direction of the vehicle, and extends in the vehicle up-down direction across the inner panel 54 of the roof side rail 52 and the inner surface of the recess 84 of the roof head lining 80. An outer end surface 62a in the vehicle left-right direction of the bracket side wall 62 is a press punched surface, and a corner in the thickness direction of the bracket side wall 62 is a sharp edge.

  The resin case 30 is integrally provided with an abutting shape portion 36 that can be brought into contact with the bracket 60 when the CSA body is inflated and deployed at a portion facing the bracket 60 diagonally in the left-right direction in the vehicle width direction cross section in the resin case longitudinal direction. Is set to The material of the abutting shape portion 36 is the same as the material of the resin case 30 and is a resin material having elasticity. The contact shape portion 36 protrudes toward the bracket 60 from the side surface opposite to the contact side surface of the resin case 30 with the CSA body 20. The abutting shape portion 36 is opposed to or in contact with the vehicle lateral direction outer side end surface 62a of the bracket side wall 62 at the front end portion in the protruding direction of the abutting shape portion 36.

  The abutting shape portion 36 has a penetrating structure (also referred to as a penetrating portion) 38 penetrating in a direction intersecting (for example, orthogonal to) the contact direction with the bracket 60. In FIG. 1 to FIG. 3, a penetrating structure 38 that penetrates in a direction parallel to a direction intersecting (for example, orthogonal to) the longitudinal direction of the resin case 30 is formed.

  As shown in FIGS. 1 and 2, the abutting shape portion 36 includes a rising wall 36 a rising from the outer surface of the resin case portion 32 corresponding to the front portion of the CSA body in the expansion gas introduction direction of the resin case 30 to the bracket 60 side. The bracket facing wall 36b is connected to the leading end of the rising wall 36a and extends in the longitudinal direction of the resin case 30. The outer surface of the bracket facing wall 36b is opposed to or in contact with the vehicle left-right direction outer end surface 62a (FIG. 2) of the bracket side wall 62 with a gap. When pressed from the occupant's head or from the CSA body when the CSA body is deployed, the abutting shape portion 36 is pressed against the assist grip bracket 60 by the bracket facing wall 36b. The wall thickness of the rising wall 36a and the bracket facing wall 36b is approximately the same as the wall thickness of the CSA contact portion of the resin case 30 in terms of molding.

In the example shown in FIGS. 1 and 3, of the pair of assist grip brackets 60 provided for the assist grip 66, the front abutting shape portion 36 </ b> A facing the front bracket 60 </ b> A provided on the front side in the vehicle front-rear direction and the rear side in the vehicle front-rear direction. The rear abutting shape portion 36B facing the rear bracket 60B provided on the side is different from the structure seen in the vehicle left-right direction.
However, the structure of the rear contact shape portion 36B may be the same as that of the front contact shape portion 36A.

  When the structures of the front contact shape portion 36A and the rear contact shape portion 36B are different, the front contact shape portion 36A has a pair of rising walls 36a. The pair of rising walls 36a, the bracket facing wall 36b, and the bracket facing wall facing portion 30a of the resin case 30 facing the bracket facing wall 36b have corners having a right angle or a substantially right angle when viewed in the vehicle left-right direction. It constitutes a quadrilateral wall. The inside of the quadrilateral wall is a through structure 38 cut out in a direction parallel to a direction intersecting (for example, orthogonal to) the longitudinal direction of the resin case 30.

  Due to the penetrating structure 38, the box-shaped contact shape portion 36 having a quadrilateral wall does not have a box bottom plate or a bottom rib extending in the vehicle front-rear direction that closes the inner space of the box shape. Therefore, the rigidity of the direction D intersecting (for example, orthogonal to) the penetration structure penetration direction C in the abutting shape portion 36 of the present invention having the penetration structure 38 cut out of the box bottom plate is the bottom plate extending in the D direction within the penetration structure 38. Or it falls compared with the box-type contact shape part with a bottom which has a bottom rib (henceforth a comparative example). As a result, the impact when the occupant's head hits the roof head lining 80 and pushes the resin case 30 in the assist grip bracket 60 direction D in a state where the CSA is not deployed is absorbed by the elastic deformation of the abutting shape portion 36, and the assist grip bracket The impact value on the passenger's head due to the reaction force from 60 is lower than in the comparative example.

  However, if the rigidity of the abutting shape portion 36 in the direction D intersecting (for example, orthogonal to) the penetration structure penetration direction C is excessively lowered, the resin case 30 is subjected to the reaction force of the CSA body 20 when the CSA body 20 is deployed. It moves too much in the assist grip bracket 60 direction. In this state, if the CSA body 20 is inflated and deployed toward the assist grip 66 (in the same direction as the direction C in FIG. 2), the deployed CSA body 20 may hit the assist grip 66 and cause the assist grip 66 to be scattered toward the passenger compartment. is there. In order to eliminate the possibility of the assist grip 66 being scattered, it is necessary to leave a predetermined amount of rigidity in the D direction of the abutting shape portion 36 so that the CSA body 20 does not approach the assist grip bracket 60 too much. For this purpose, the abutting shape portion 36 has no bottom plate or bottom rib, but leaves a quadrilateral wall including a pair of rising walls 36a and leaves a predetermined amount of rigidity in the D direction by the pair of rising walls 36a.

  1 and 3 show a case where the structure of the rear contact shape portion 36B is different from the structure of the front contact shape portion 36A. In that case, the rear abutting shape portion 36B includes one rising wall 36a, a bracket facing wall 36b that extends from the rising wall 36a to the rear of the vehicle and that faces the assist grip bracket 60 in a direction orthogonal to the direction, a bracket facing wall 36b, and a resin. A connecting wall 36c bent in a stepped manner for connecting the side wall 34b of the case mounting portion 34, a bracket facing wall 36b, a resin case portion 30b facing the connecting wall 36c, and a side wall 34b of the resin case mounting portion 34. Including. A space surrounded by the rising wall 36a, the bracket facing wall 36b, the connecting wall 36c, the resin case portion 30b, and the side wall 34b is cut out in a direction parallel to a direction intersecting (for example, orthogonal to) the longitudinal direction of the resin case 30. The through structure 38 is formed.

  The connecting wall 36c bent in a stepped shape rises from the end of the bracket facing wall 36b on the side of the resin case mounting portion side wall 34b to the side opposite to the resin case portion 30b, and then bends to the side wall 34b of the resin case mounting portion 34. It has a stepped shape extending to the side wall 34b of the resin case mounting portion 34. By providing the connecting wall 36c bent in a stepped manner, the rigidity of the rear abutting shape portion 36B in the direction D intersecting (for example, orthogonal to) the penetrating structure 38 penetrating direction is reduced as compared with the comparative example, Even when compared with the rigidity in the direction D of the front contact shape portion 36A, it slightly decreases. However, the rigidity remains such that the resin case 30 is not moved excessively toward the assist grip bracket 60 when the CSA body 20 is deployed.

FIG. 1 shows the case where the inflation gas is introduced into the CSA body 20 above the B pillar 53 and the front portion 22 of the inflation gas introduction direction is located on the side of the front seat of the vehicle. The position of the direction front portion 22 is not limited to this. That is, in the case of a two-row seat, the expansion gas introduction direction front portion 22 may be on the rear seat side. It may be on the side of the seat.
Further, although the assist grip bracket 60 is taken as an example of the body sheet metal part 60, the body sheet metal part 60 may be a body sheet metal part other than the assist grip bracket 60.

Next, operations and effects of the vehicle curtain airbag device 10 will be described.
At the time of a vehicle side collision or rollover, the CSA body 20 is inflated and deployed by being supplied with an inflation gas from the inflator. At the time of a vehicle side collision, the CSA body 20 on the collision side in the vehicle left-right direction is inflated and deployed, and at the time of rollover, the CSA body 20 on both sides in the vehicle left-right direction is inflated and deployed. The CSA body 20 is deployed between the occupant head and the passenger compartment side to protect the occupant's head.

  Since the resin case 30 is provided on the sheet metal body 50 side of the CSA body 20, the CSA body 20 moves to the sheet metal body 50 side in response to the reaction force of the expansion and deployment of the CSA body 20 when the CSA body 20 is expanded and deployed. It is possible to prevent burst from hitting the sharp edge at the end of the sheet metal body 50.

  Further, since the resin case 30 is provided with a contact shape portion 36 that can come into contact with a body sheet metal part 60 fixed to the sheet metal body 50, for example, the assist grip bracket 60, the CSA body 20 is expanded when the CSA body 20 is inflated and deployed. It is also possible to prevent 20 from hitting the sharp edge of the body sheet metal part 60 and bursting.

  By providing the abutting shape portion 36, excessive movement of the CSA body 20 in the D direction and in the body sheet metal part 60 direction is restricted. As a result, when the CSA body 20 expands and deploys at a position where it moves excessively in the direction of the body sheet metal part 60, it hits the body peripheral interior part 66 supported by the body sheet metal part 60, and the body peripheral interior part 66 is scattered in the vehicle interior direction. Is prevented. As a result, the deployment performance of the CSA body 20 is improved.

  The abutting shape portion 36 has a penetrating structure 38 penetrating in the direction C perpendicular to the contact direction D with the body sheet metal part 60, for example, in a direction parallel to the longitudinal direction of the CSA body 20 (for example, orthogonal). Therefore, the rigidity decreases in the contact direction D with the body sheet metal part 60. Therefore, when the occupant's head hits a vehicle interior part, for example, the roof head lining 80, the abutting shape portion 36 is elastically deformed, and the impact due to the reaction force from the body sheet metal part 60 to the head is also reduced. Reduce the impact value. As a result, both CSA deployment performance and head impact absorption performance can be achieved.

  Since the abutting shape portion 36 is integrally set in the resin case 30, it is not necessary to provide a shock absorber separate from the resin case described in Patent Document 2. As a result, it is not necessary to secure a space for installing a separate shock absorber, and the cost can be reduced.

  When the body sheet metal part 60 is the assist grip bracket 60, the contact shape portion 36 abuts on the assist grip bracket 60 when the CSA is deployed, and excessive movement of the CSA body 20 in the direction of the assist grip bracket 60 is restricted. As a result, when the CSA body 20 is inflated and deployed in an excessively moved state, the body peripheral interior parts supported by the assist grip bracket 60, that is, the assist grip 66, are scattered into the vehicle interior by hitting the CSA body 20. Is prevented.

  The resin case portion 32 corresponding to the front portion 22 of the CSA main body in the expansion gas introduction direction is provided with the resin case attachment portion 34 and the abutting shape portion 36. It is possible to suppress the rampage of the front portion 22 in the gas introduction direction, and to prevent the body sheet metal part 60 from being scattered.

  Since the front abutting shape portion 36A is a quadrilateral box-type structure without a bottom plate or bottom rib, the rigidity in the D direction can be easily reduced as compared with a box-type structure with a bottom plate, and it has a rising wall 36a. Excessive movement of the CSA body 20 in the direction of the assist grip bracket 60 can be suppressed. As a result, both CSA deployment performance and head impact absorption performance are obtained.

  When the rear abutting shape portion 36B includes the connecting portion 36c, it is possible to provide rigidity lower than that of the front abutting shape portion 36A. However, the rear contact shape portion 36B may have the same configuration as the front contact shape portion 36A.

10. Vehicle curtain airbag device (vehicle CSA device)
20 CSA body 22 CSA body inflating gas introduction direction front part 30 Resin case 36 Abutting shape part 38 Penetration structure 50 Sheet metal body 60 Body sheet metal part (for example, assist grip bracket)
66 Assist grip

Claims (2)

In a curtain air bag device for a vehicle having a resin case that holds a folded curtain airbag body and attaches to a sheet metal body of the vehicle,
In the resin case, integrally set a contact shape portion that can contact the body sheet metal parts fixed to the sheet metal body,
Correspondingly, the shape portion has a penetrating structure in a direction intersecting the contact direction with the body sheet metal part.   The vehicle curtain airbag device according to claim 1, wherein the body sheet metal part is an assist grip bracket.

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