JP6507586B2 - Roofside reinforcement structure for vehicles equipped with curtain airbags - Google Patents

Description

  The present invention relates to a roof side reinforcing structure of a curtain airbag mounted vehicle.

  An airbag is stored in the roof side portion for the purpose of mainly protecting the head of the occupant against an impact load from the side of the vehicle, and a curtain airbag that is inflated and deployed when an impact load is detected. Devices are well known. Such a curtain air bag device comprises an elongated wound air bag, an inflator for inflating and deploying the air bag, and the like.

  On the other hand, in order to transmit the energy input by the impact load from the side of the vehicle from the center pillar to the roof cross member and to suppress the deformation of the cabin, the joint with the roof cross member at the roof side at the top of the center pillar May be provided with a reinforcement structure. Patent Document 1 discloses a roof side reinforcing structure utilizing a curtain airbag inflator mounting structure. However, since this structure also serves as the attachment portion of the inflator, it is difficult to obtain sufficient reinforcement effect due to space limitations.

JP, 2009-56874, A

  The present invention has been made in view of such a situation, and an object thereof is to provide a roof side reinforcing structure of a curtain airbag mounted vehicle capable of obtaining a sufficient reinforcing effect with a simple configuration. .

In order to solve the problems of the above-mentioned prior art, the present invention is
The roof side reinforcement structure of a vehicle equipped with a curtain airbag,
A roof panel (3) disposed at an upper portion of a cabin, a pair of left and right roof side rails (4) extending in the vehicle longitudinal direction along a side edge of the roof panel, and an upper end coupled to the roof side rail And a roof cross member (31) extending in the vehicle width direction between the left and right roof side rails above the joint portion of the center pillar;
The roof side rail (4) includes a side body outer panel (51), a rail side panel (41) disposed on the cabin side, and a roof side reinforcement (42) disposed therebetween. The upper edge (42a) of the roof side reinforcement is joined to the upper edge flange (41a) of the rail side panel, and the lower end (41b) of the rail side panel and the lower end (42b) of the roof side reinforcement Is joined with the upper end (52b) of the center pillar inner panel (52), and a closed cross section (B) is defined between the rail side panel (41) and the roof side reinforcement (42). ,
The end (31a) of the roof cross member and the side edge of the roof panel on the joint of the upper edge flange (41a) of the rail side panel and the upper edge flange (4a) of the side body outer panel (3a) is overlapped and joined to form a flange joint (34) extending in the longitudinal direction of the vehicle,
The curtain airbag (2) is disposed along the compartment side of the rail side panel in an elongated wound state (21), and inflates and deploys the airbag (21) and the inflator (22) And a deployment assisting member (8) for regulating the deployment direction of the air bag,
The deployment assisting member (8) includes a proximal end fixing portion (83) fixed to the rail side panel (41) above the center pillar (5), and the airbag from the proximal end fixing portion (83) (21) A first development assisting surface (81) directed obliquely downward toward the vehicle interior at the lower side, and the vehicle interior at the upper side of the airbag (21) from the proximal end fixing portion (83) A second expansion assisting surface (82) oriented obliquely upward toward the upper end, and an upper end fixing portion (84) fixed to the roof cross member (31) at an upper end of the second expanding assist surface;
The rail side panel (41) has a lower surface extending inward from the base of a joint (41b) with the center pillar inner panel (52), and an upper edge flange ( The proximal end fixing portion (83) is fixed to the lowermost portion of the inclined surface adjacent to the bending portion, having an inclined surface linearly and obliquely extending toward the base of 41a);
The second development assisting surface (82) is a brace (82) extending linearly across the flange joint (34) between the proximal end fixing portion (83) and the upper end fixing portion (84). also serves as a, the closed cross-section (B) triangular space adjacent to (D) are defined between said brace (82) and said rail side panel (41),
The inflator (22) is characterized in that it is disposed at the rear or front of the deployment assisting member (8) in the longitudinal direction of the vehicle.

Since the present invention is configured as described above, the following effects can be obtained.
In addition to the first deployment assisting surface that regulates the deployment direction on the lower side of the airbag, the deployment assisting member is provided with a second deployment assisting surface that regulates the deployment direction on the upper side of the airbag. Of the roof side rail and the roof cross member because the second development assisting surface also serves as a brace extending linearly between the proximal end fixing portion and the upper end fixing portion. The rigidity of the connecting portion is improved, and energy input by impact load from the side of the vehicle can be widely dispersed through the roof side rail and the roof cross member, which is advantageous in suppressing the deformation of the passenger compartment.

Further, the proximal end fixing portion (83) is disposed above the center pillar (5, 52), and rigidity of a joint portion between the upper end portion of the center pillar and the roof side rail and the roof cross member or torsion of the vehicle body. It is advantageous in improving the rigidity against

In a further preferred aspect of the present invention, the brace (82) is formed with a reinforcing bead ( 82b ) extending linearly between the proximal end fixing portion (83) and the upper end fixing portion (84). Therefore, it is advantageous in improving the bending rigidity of the brace, and improving the rigidity of the joint between the upper end of the center pillar and the roof side rail and the roof cross member and the rigidity against the torsion of the vehicle body.

It is the perspective view which looked at the roof side of a curtain airbag mounting vehicle from the room side. It is the perspective view which looked at the roof side of the curtain air bag loading vehicle provided with the reinforcement structure concerning the present invention from the indoor side in the state where the interior material was removed. It is AA sectional drawing of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, the curtain airbag 2 mainly extends from the top of the front pillar 6 to the roof side along the roof side so that the curtain airbag 2 can be deployed on the side window portion of the vehicle 1 for the purpose of protecting the occupant's head. It is stored on the back side of the 30 in an elongated wound state. When the curtain airbag 2 is inflated and deployed, the edge of the front pillar trim 60 and the edge of the roof lining 30 along the roof side are released from the joint portion of the center pillar 5 with the pillar trim 50 and the quarter pillar 7 with the quarter trim 70. Ru.

  FIG. 2 is a perspective view of the connecting portion between the upper end of the center pillar 5 and the roof side rail 4 as viewed from the indoor side with the pillar trim 50 and the roof lining 30 removed, and FIG. It is. In each drawing, a pair of left and right roof side rails 4 extending in the longitudinal direction of the vehicle are provided along the left and right side edges of the roof panel 3 disposed in the upper part of the compartment 10. A roof cross member 31 extending in the vehicle width direction is provided between the left and right roof side rails 4 above the joint with the roof side rail 4. The roof cross member 31 has its edge flange 31a superimposed on the lower surface of the side edge flange 3a of the roof panel 3 in advance and is welded and joined to the roof side rail 4 together with the roof panel 3 as described later. .

  The roof side rail 4 includes a side body outer panel 51 constituting a side surface of the vehicle body, a rail side panel 41 disposed on the cabin side, and a roof side reinforcement 42 disposed therebetween. The upper edge flange 4a of the side body outer panel 51 is overlapped and welded on the upper edge flange 41a (and the upper edge flange 42a of the roof side reinforcement 42) of the rail side panel 41, and pre-welded thereon The edge flange 31a of the roof cross member 31 joined and the side edge flange 3a of the roof panel 3 are overlapped and welded to form a flange fixing portion 34 extending in the longitudinal direction of the vehicle.

  As shown in FIG. 2, the upper edge flange 42 a of the roof side reinforcement 42 is cut away at the portion to which the end edge flange 31 a of the roof cross member 31 is welded, and the rail side panel is otherwise The upper edge flange 41a of the side body outer panel 51 and the upper edge flange 4a of the side body outer panel 51 are overlapped and welded, and the upper edge flange 41a of the rail side panel 41 is notched. The upper edge flange 4 a and the side edge flange 3 a of the roof panel 3 are overlapped and welded. The notches are offset in the longitudinal direction of the flange fixing portion 34 (the longitudinal direction of the vehicle).

  On the other hand, at the upper end portion of the center pillar 5, the lower end 41b of the rail side panel 41 and the lower end 42b of the roof side reinforcement 42 are overlapped and welded with the upper end 52b of the center pillar inner panel 52, and the rail side panel 41 and the roof side phosphorus A closed cross section B is defined between it and the force 42.

  Furthermore, the lower end 51b of the side body outer panel 51 is overlapped and welded with the lower end 42b of the roof side reinforcement 42 and the lower end 41b of the rail side panel 41 at a portion facing the front and rear door openings of the vehicle. An opening flange is formed, and a closed cross section B between the rail side panel 41 and the roof side reinforcement 42 and a closed cross section C between the side body outer panel 51 and the roof side reinforcement 42 are defined. There is.

  Further, a pillar reinforcement 53 is provided between the center pillar inner panel 52 and the side body outer panel 51 constituting the center pillar 5, and they face the front and rear door openings of the center pillar 5 in the vehicle longitudinal direction. The parts are overlapped and welded to form a door opening flange and a closed cross section is defined between them. The upper end 53 a of the pillar reinforcement 53 is welded and fixed to the roof side reinforcement 42 in advance.

  On the room 10 side of the roof side portion of the vehicle 1 configured as described above, as shown in FIG. 2, a deployment assisting member 8 is provided which regulates the deployment direction of the long and thinly wound airbag 21. An inflator 22 for inflating and deploying the air bag 21 is disposed at the rear in the vehicle longitudinal direction with respect to the deployment assisting member 8. The air bag 21 is bound in a long and thin state with a readily breakable adhesive tape or the like, and a rail side panel is provided at its end with a plurality of fixing brackets 23 provided appropriately spaced in the vehicle longitudinal direction. It is fixed to 41. In addition, the hole 41c of the rail side panel 41 is for fixing a harness.

  As shown in FIG. 3, the deployment assisting member 8 is a first deployment assisting surface directed obliquely downward toward the vehicle compartment at the lower side of the airbag 21 from the proximal end fixing portion 83 fixed to the rail side panel 41. And a second development assisting surface 82 oriented obliquely upward from the base end fixing portion 83 to the upper side of the airbag 21 and into the vehicle interior. The deployment assisting member 8 has a substantially V-shaped cross-sectional shape (or the second deployment assisting surface compared to the first deployment assisting surface 81) expanded toward the compartment 10 by the two deployment assisting surfaces 81 and 82. 82 has a long substantially L-shaped cross-sectional shape), and the cylindrically wound airbag 21 is disposed between the two development assisting surfaces 81, 82.

  The base end fixing portion 83 is fixed to the weld nut 41 n fixed to the back surface of the rail side panel 41 by fastening a bolt 83 b and is provided at the upper end of the second development assisting surface 82 extending upward from the base end fixing portion 83. The flange-like upper end fixing portion 84 is fixed by fastening a bolt 84 b to a weld nut 31 n fixed to the back surface of the roof cross member 31.

  Thereby, the second deployment assisting surface 82 of the deployment assisting member 8 constitutes a brace (82) extending linearly across the flange fixing portion 34 between the base end fixing portion 83 and the upper end fixing portion 84. A triangular space D (truss structure) is defined between the roof cross member 31 including the flange fixing portion 34 and the rail side panel 41. A reinforcing bead 82b linearly extending between the proximal end fixing portion 83 and the upper end fixing portion 84 is formed substantially in the widthwise center of the brace (the second development assisting surface 82), and sufficient bending rigidity is ensured. It is done.

  On the other hand, as shown in FIG. 2, both sides of the first deployment assisting surface 81 project slightly in the vehicle longitudinal direction with respect to the second deployment assisting surface 82 and are slightly bent in the direction away from the second deployment assisting surface 82. ing. Further, as shown in FIG. 3, the tip end 81 a of the first development assisting surface 81 is bent downward to constitute a receiving portion of the roof lining 30. The roof trim 30 is mounted on the center pillar inner panel 52 in a state where the upper end 50 a of the pillar trim 50 is overlapped on the indoor side of the end 30 a of the roof lining 30, whereby the roof lining 30 receives the first development assisting surface 81. It is mounted in a state of being in contact with the portion (81a).

  As described above, the roof lining 30 is locked by being superimposed on the back side of the edge of the adjacent interior material (pillar trim 50, front pillar trim 60, quarter trim 70) as described above, and other intermediate layers In the case, the clip is attached to the roof cross member 31 or a hole provided in the rear cross member (not shown) and attached to the ceiling portion of the vehicle compartment 10, and the airbag 21 and its fixing bracket 23, and The inflator 22 is covered by a roof lining 30.

  In the curtain airbag 2 assembled as described above, when the air bag 21 is instantaneously expanded by the gas injected from the inflator 22, the adhesive tape binding the air bag 21 in a cylindrical shape is broken, and the roof lining 30 is formed. Is pressed from the back side, the end 30a of the roof lining 30 comes off from the upper end 50a of the pillar trim 50, expands from the gap between them into the compartment 10, and expands downward like a curtain along the side of the compartment. Be done. At this time, the deployment direction of the air bag 21 is restricted from both upper and lower sides by the first deployment assisting surface 81 of the deployment assisting member 8 extending downward and the second deployment assisting surface 82 extending upward. Thus, the back surface of the roof lining 30 can be reliably pressed and developed in a desired direction.

  On the other hand, as described above, the second expansion assisting surface 82 of the expansion assisting member 8 is a brace (822) extending linearly across the flange fixing portion 34 between the base end fixing portion 83 and the upper end fixing portion 84. The roof side rail 4 and the roof cross member 31 are formed by forming a triangular truss structure between the roof cross member 31 including the flange fixing portion 34 and the rail side panel 41. The rigidity of the joint with the housing is improved, and energy input by impact load from the side of the vehicle can be widely dispersed through the roof side rail 4 and the roof cross member 31 or the center pillar 5. It is advantageous in suppressing deformation.

  As mentioned above, although one embodiment of the present invention was described, it adds that the present invention is not limited to the above-mentioned embodiment, and various modification and change are possible based on the technical thought of the present invention.

DESCRIPTION OF SYMBOLS 1 vehicle 2 curtain airbag 3 roof panel 3a side edge 4 roof side rail 4a upper edge flange 5 center pillar 8 expansion | deployment assistance member 10 compartment 21 airbag 22 inflator 23 fixing bracket 30 roof lining 31 roof cross member 31a end edge flange 34 Flange fixing portion 41 Rail side panel 41a Upper edge flange 42 Roof side reinforcement 50 Pillar trim 51 Side body outer panel 81 First deployment assisting surface 82 Second deployment assisting surface (brace)
82b Reinforcement bead 83 Base end fixing part 84 Upper end fixing part

Claims (2)

The roof side reinforcement structure of a vehicle equipped with a curtain airbag,
A roof panel disposed at an upper portion of a cabin, a pair of left and right roof side rails extending in a vehicle longitudinal direction along a side edge of the roof panel, and a center pillar having an upper end coupled to the roof side rail; A roof cross member extending in the vehicle width direction between the pair of left and right roof side rails above the coupling portion of the center pillar;
The roof side rail includes a side body outer panel, a rail side panel disposed on the vehicle compartment side, and a roof side reinforcement disposed therebetween, and the upper edge of the rail side panel The upper edge of the roof side reinforcement is joined to the flange, and the lower end of the rail side panel and the lower end of the roof side reinforcement are joined to the upper end of the center pillar inner panel, and the rail side panel and the roof side reinforcement And a closed cross-section is defined between
The end of the roof cross member and the side edge of the roof panel are overlapped and joined on the joint portion between the upper edge flange of the rail side panel and the upper edge flange of the side body outer panel, and the vehicle longitudinal direction A flange joint extending to the
The curtain airbag is disposed along the compartment side of the rail side panel in an elongated wound state, and an inflator for inflating and deploying the airbag and a deployment assisting member for regulating the deployment direction of the airbag. Equipped with
The deployment assisting member is oriented obliquely downward toward the vehicle interior at the lower side of the airbag from the base end fixing portion fixed to the rail side panel above the center pillar and the base end fixing portion. The first expansion assisting surface , the second expansion assisting surface directed obliquely upward from the base end fixing portion toward the vehicle compartment on the upper side of the airbag, and the upper end of the second expansion assist surface And an upper end fixing portion fixed to the roof cross member,
The rail side panel is straightly and obliquely toward the base of the upper edge flange from the lower surface extending inward of the vehicle from the base of the joint portion with the center pillar inner panel, and the inboard portion of the lower surface toward the base The proximal end fixing portion is fixed to the lowermost portion of the inclined surface adjacent to the bending portion, having the extending inclined surface,
The second expansion auxiliary surface, the also serves as a brace for the linearly extending astride the flange joint between the base end fixing portion and the upper fixing part, between the rail side panel and the brace A triangular space adjacent to the closed cross section is defined in
The roof side reinforcing structure of a curtain airbag-equipped vehicle, wherein the inflator is disposed rearward or forward of the deployment assisting member in the vehicle longitudinal direction.   The roof side reinforcement of a curtain airbag-equipped vehicle according to claim 1, wherein the brace is formed with a reinforcing bead extending linearly between the base end fixing portion and the upper end fixing portion. Construction.

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