JP2017149347A - Air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air bag device capable of being inflated without hindrance even when there is an interference part (bolt or the like) on a vehicle body side.SOLUTION: A head protection air bag device 40 comprises an air bag body 42 for protecting a head, a case 41 for protecting the air bag body 42, and a protection member 43. The protection member 43 is fixed with the folded air bag body 42 and the case 41 by a tape material 47 so that, the protection member is coupled to an upper side of the case 41 and is arranged in an in-car-side of the air bag body 42. When the air bag is inflated, the protection member 43 can move to an upward of the vehicle independently from the air bag body 42, and can cover an interference part (bolt 64, 68) on a vehicle body side, and the air bag body 42 can be inflated and expanded to a side part in the car, for surely protecting an occupant.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an airbag device that can be inflated without hindrance even when there is an interference component (such as a bolt) on the vehicle body side.

  Conventionally, the head protection airbag device is attached to a roof side rail inner, and when the inflator is activated, the ceiling material is pushed open and inflated and deployed downward along the side of the vehicle interior. On the other hand, as a structure of the vehicle body, a roof panel center reinforcement and a connecting bracket connected to a sunroof reinforcement are fastened with a roof side rail inner and a bolt (Patent Document 1). However, when the bolt is close to the head protection airbag device described above, there is a possibility that the airbag may come into contact with the airbag when the airbag is inflated. As a countermeasure, for example, it is conceivable to apply an airbag integrally formed with a biting prevention piece as in Patent Document 2.

JP 2005-59649 A JP 2002-67859 A

However, in the configuration as in Patent Document 2, there is a problem that the airbag package when folded is large, and the entire package of the airbag device including the case is large. This is particularly noticeable when it is necessary to enlarge the biting prevention piece, such as when the distance between the bolt and the head protection airbag device is slightly apart.

  The present invention solves the above-described problems, and provides an airbag device that can reliably inflate and deploy regardless of the vehicle body structure to protect an occupant and can maintain the size of the package mounted on the vehicle as before. For the purpose.

The present invention
An airbag device (40) that deploys and inflates downward from the top of the vehicle (1) when a collision with the vehicle (1) is detected or predicted,
The airbag device (40)
An airbag body (42) for protecting an occupant;
A protective member (43) comprising a case (41) covering the airbag main body (42) and being joined at the upper part of the case (41) or integrally formed at the upper part of the case (41); When the airbag main body (42) is inflated, the airbag main body (42) is movable upward from the vehicle independently of the airbag main body (42);
Features.

As a preferred embodiment,
The airbag device (40) includes an airbag folded body (42A) obtained by folding the airbag body (42), the case (41), and a fold holding member (47) that holds the protection member (43). ),
It is preferable to have a configuration comprising

In a preferred embodiment, the protective member (43) is preferably arranged on the inner side of the airbag body (42).

According to the airbag device of the first aspect of the present invention, when the airbag main body 42 is inflated, the protection member 43 is movable upward independently of the airbag main body 42. Therefore, the protective member 43 reliably covers the peripheral parts (bolts) and the like of the vehicle body 12, and the airbag main body 42 does not come into contact with the peripheral parts (bolts) and the like and can be inflated and deployed reliably, thereby restraining the occupant. it can. Further, the protective member 43 is joined or integrally formed on the upper side of the case 41, so that the folded airbag body 42 does not become large. Therefore, the size of the package of the airbag device mounted on the vehicle can be maintained as usual.

According to the airbag device of the second aspect of the present invention, the case 41, the airbag folded body 42A, and the protection member 43 are held by the tape material 47 (fold holding material), and can be easily transported. Become.

According to the airbag device of the third aspect of the present invention, the airbag main body 42 can be disposed on the side surface of the vehicle body (the vehicle outer side) and can be inflated and deployed along the side surface of the vehicle body.

It is the perspective view which looked at the automobile concerning one embodiment of the present invention from the slanting front. It is the disassembled perspective view which looked at the vehicle body structure of the motor vehicle concerning one embodiment of the present invention from the vehicle body slant front outside. 1 is an overall view showing a mounting structure of a head protection airbag device according to an embodiment of the present invention. It is the figure which added the ceiling material in the schematic sectional drawing of 4-4 of FIG. 1, or sectional drawing of the IV-IV site | part of FIG. In FIG. 4, it is a figure when an airbag main body expand | swells. It is the perspective view which looked at the modification of the motor vehicle concerning one Embodiment of this invention from diagonally forward.

  Even when the airbag device and the interference parts (bolts, etc.) of the vehicle body are close to each other, an airbag device that can be inflated without hindrance and that can maintain the size of the package is realized with a simple configuration.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In the figure, the arrow FR indicates the vehicle body front direction, the arrow UP indicates the vehicle body upward direction, and the arrow IN indicates the vehicle width inside direction.

  As shown in FIG. 1, the roof panel center reinforcement 10 is arranged in the longitudinal direction of the roof panel 14 in the vehicle width direction, that is, in the vehicle width direction, at a substantially central part in the vehicle body longitudinal direction of the roof panel 14 of the vehicle body 12. Has been.

As shown in FIG. 2, the roof panel center reinforcement 10 has a cross-sectional shape viewed from the vehicle width direction as a hat shape with the opening facing the vehicle body upward, and at the center in the front-rear direction of the bottom 10 </ b> A, A convex portion 10B that bulges upward is formed along the vehicle width direction. A pair of front and rear through holes 18 are formed on both ends 10C in the vehicle width direction of the bottom portion 10A with the convex portion 10B interposed therebetween. A weld nut is coaxially formed with the through holes 18 on the upper surface of the bottom portion 10A. 20 is arranged.
The shape of the entire roof panel center reinforcement 10 viewed from the front of the vehicle body is an upwardly curved curved shape.

  As shown in FIGS. 4 and 5, a welding spot groove 26 between the flange 14 </ b> A of the roof panel 14 and the flange 24 </ b> A of the cylinder outer 24 is formed along the vehicle longitudinal direction on the outer edge of the roof panel 14 in the vehicle width direction. ing. The flange 10D of the roof panel center reinforcement 10 is welded between the flange 14A of the roof panel 14 and the flange 24A of the cylinder outer 24. Further, the outer cylinder 24 forms a roof side rail outer 24 </ b> B and a center pillar outer 24 </ b> C that constitutes a vehicle body outer side portion of the center pillar 25.

  The upper end edge 28A of the center pillar inner 28 is welded to the lower end edge 30A of the roof side rail inner 30 disposed along the longitudinal direction of the vehicle body, and the upper end edge 30B of the roof side rail inner 30 is It is welded to the lower surface side of 24 flanges 24A. Further, a roof side rail reinforcement 32 is disposed along the roof side rail inner 30 on the outside of the vehicle body of the roof side rail inner 30, and an upper end edge portion 32 </ b> A of the roof side rail reinforcement 32 is a cylinder outer 24. The flange 24 </ b> A is welded to the upper edge 30 </ b> B of the roof side rail inner 30.

Further, the lower end edge portion 32B of the roof side rail reinforcement 32 is welded to the outer surface in the vehicle width direction of the lower end edge portion 30A of the roof side rail inner 30 so that the roof side rail inner 30 and the roof side rail reinforcement 32 Thus, a closed cross-sectional structure 34 extending in the longitudinal direction of the vehicle body is formed.

As shown in FIG. 2, the roof side rail inner 30 has a through hole 50 formed in a portion 30 </ b> C near the upper edge 30 </ b> B. The roof side rail inner 30 is coaxial with the through hole 50 on the upper surface. A weld nut 52 is disposed on the surface.
As shown in FIG. 1, a connection bracket 60 as a reinforcing member is disposed below the welding spot groove 26.

  As shown in FIG. 2, the connecting bracket 60 has a U-shaped cross-section viewed from the vehicle width direction with the opening facing the lower side of the vehicle body. A convex portion 60B that bulges downward is formed along the vehicle width direction. Further, a pair of front and rear through holes 62 are formed in the vehicle width direction inner end portion 60C of the upper wall portion 60A, and bolts 64 inserted into the through holes 62 from the vehicle body lower side are roof panel center reinforcements. The through-hole 18 formed in the ment 10 is inserted into the weld nut 20 and fastened.

On the other hand, a through-hole 66 is formed in the vehicle width direction outer side end portion 60D of the upper wall portion 60A of the connection bracket 60 in the center portion in the front-rear direction, and a bolt 68 inserted into the through-hole 66 from the lower side of the vehicle body. The through hole 50 formed in the roof side rail inner 30 is inserted and fastened to the weld nut 52.

  Accordingly, in the connection bracket 60, the inner end 60 </ b> C in the vehicle width direction of the upper wall portion 60 </ b> A is coupled to the roof panel center reinforcement 10 on the inner side in the vehicle width direction of the welding spot groove 26, The outer end 60D in the vehicle width direction of the upper wall portion 60A is coupled to the roof side rail inner 30 on the outside.

The head protection airbag device 40 is inflated and deployed inside the vehicle 1 when a collision determination device (not shown) detects or predicts a collision with the vehicle 1.
As shown in FIGS. 3 and 4, the head protection airbag device 40 is disposed between the roof side rail inner 30 and the outer edge 38 </ b> A of the ceiling member 38 in the vehicle width direction. A center pillar garnish 39 is provided on the vehicle interior side of the center pillar inner 28.

As shown in FIG. 3, the head protection airbag device 40 is attached to the upper side of the vehicle 1 (the roof side rail inner 30). The head protection airbag device 40 includes an airbag main body 42 that can be deployed at the time of a car collision, an inflator 44 that allows gas to be inflated by inflating the airbag main body 42, and a resin case 41 that covers the airbag main body 42. And a fixture 46 for attaching the case 41 and the airbag main body 42 to the vehicle body 12 (the roof side rail inner 30), and a mounting bracket 45 for fixing the inflator 44 to the airbag main body 42. The airbag main body 42 is covered with a case 41 and mounted on a vehicle in the state of an airbag folded body 42A in which the upper side is folded in a bellows and the lower side is rolled, and the head protection airbag device 40 is installed in an airbag. And a tape material 47 (fold holding material) for holding the bag folding body 42A.

As shown in FIG. 4, the protective member 43 is fixed to the case 41 by inserting the mounting hole 43a of the protective member 43 into the retaining portion 41a formed on the upper side of the case 41 and melting the retaining portion 41a. Has been. The protective member 43 is disposed inside the folded airbag body 42 and attached to the case 41 together with the airbag body 42 by a tape material 47. The protection member 43 of the present embodiment is made of the same material as the airbag body 42. The method of fixing the protection member 43 and the case 41 is not limited to the above, and a method of engaging the protection member 43 with the retaining portion 41a may be used. Further, the protective member 43 may be integrally formed from the vehicle inner upper side of the case 41.

FIG. 5 is a view when the airbag main body 42 is inflated. When the inflator 44 is actuated, the airbag main body 42 pushes open the vehicle width direction outer side edge portion 38A of the ceiling material 38, and is inflated and deployed downward along the vehicle interior side portion. When the airbag main body 42 is inflated and deployed, the protective member 43 moves upward of the vehicle independently of the airbag main body 42 and can cover the bolts 64 and 68.

The head protection airbag device 40 configured as described above operates as follows to achieve the effects of the present invention.
When a collision with the vehicle 1 is detected or predicted based on a collision determination device (not shown), the inflator 44 is operated and the airbag body 42 is inflated and deployed on the side of the vehicle interior of the vehicle 1.

  As shown in FIG. 5, as the airbag body 42 is inflated and deployed, the protection member 43 moves upward of the vehicle independently of the airbag body 42 and can cover the bolts 64 and 68. Therefore, the airbag main body 42 does not come into contact with the bolts 64 and 68 of the vehicle body 12 and can be inflated and deployed reliably to protect the occupant.

  As shown in FIG. 4, since the protective member 43 is arranged extending from the upper side of the case 41, the package of the airbag folded body 42A obtained by folding the airbag main body 42 is not enlarged. The package of the head protection airbag device 40 including 41 can also maintain the same size as before.

  FIG. 6 is a perspective view of a modified example of the automobile according to the embodiment of the present invention viewed obliquely from the front. As shown in FIG. 6, in the vehicle body 82 equipped with the sunroof 80, the connecting bracket 60 as a reinforcing member is shared with a bracket for fastening the sunroof reinforcement 84 to the roof side rail inner 30. The head protection airbag device 40 may be assembled to the type of automobile shown in FIG.

  In the embodiment, the head protection airbag device is described as an example. However, for example, the rear impact airbag device deployed at the rear end of the vehicle according to the present invention and the airbag device that protects an occupant from the ceiling in the vehicle are also described. Applicable.

1 Vehicle 40 Head Protection Airbag Device (Airbag Device)
41 Case 42 Airbag body 42A Airbag folded body 43 Protection member 47 Tape material (folding holding material)

Claims (3)

An airbag device (40) that deploys and inflates downward from the top of the vehicle (1) when a collision with the vehicle (1) is detected or predicted,
The airbag device (40)
An airbag body (42) for protecting an occupant;
A protective member (43) comprising a case (41) covering the airbag main body (42) and joined to the upper part of the case (41) or integrally formed with the upper part of the case (41). When the airbag main body (42) is inflated, the airbag main body (42) is movable upward from the vehicle independently of the airbag main body (42);
An airbag device characterized by the above.   The airbag device (40) includes an airbag folded body (42A) obtained by folding the airbag body (42), the case (41), and a fold holding member (47) that holds the protection member (43). The airbag device according to claim 1, further comprising:   The airbag device according to claim 1 or 2, wherein the protection member (43) is disposed on the inner side of the airbag main body (42).

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