JP6294622B2 - Curtain airbag device mounting structure - Google Patents

Description

  The present invention relates to a curtain airbag device mounting structure in which an airbag bag body is mounted along a roof side rail of a vehicle body.

  2. Description of the Related Art In recent years, a curtain airbag device that protects an occupant by inflating and deploying an airbag bag body in a curtain shape along a vehicle interior side portion in an emergency such as a side collision or rollover of the vehicle is mounted on a vehicle in recent years.

In this type of curtain airbag device, for example, a longitudinal airbag bag body extending from the front pillar to the rear portion of the roof side rail is stored in a thinly folded state, and covered from the vehicle interior side by the side edge of the roof trim. . Then, in an emergency, an inflator gas is ejected into the airbag body, the air bag body is inflated and deployed downward along the vehicle interior side while pushing the end portion of the root off trim like a curtain.

  However, this airbag bag body is bolted and fixed to the roof side rail by a plurality of mounting portions provided at intervals in the airbag bag body in a folded state, so that the airbag bag body is partially between the mounting portions. I am concerned that it will hang down.

  When the airbag bag body partially hangs down, it interferes with the work of attaching the roof trim and may hinder rapid inflation and deployment of the airbag bag body in an emergency.

  As a countermeasure, for example, Patent Document 1 discloses a structure for attaching an airbag device that prevents the airbag bag body from drooping. An outline of this mounting structure will be described with reference to FIG.

  The airbag bag body 105 folded along the roof side rail 101 is bolted and fixed to the roof side rail 101 by a plurality of attachment portions 106 provided on the airbag bag body 105. Normally, the airbag bag body 105 is folded into a roll that is thinly wound in the vertical direction, and the outer peripheral tape 107 that can be cut by inflating and deploying is wound around the outer periphery of the folded airbag bag body 105 and folded. Retained.

  Further, a support tape 103 is wound around a pair of brackets 102 provided on the roof side rail 101 that supports both ends of an assist grip (not shown) attached to the roof side rail 101, and the wound support tape 103 is wound. Furthermore, the airbag bag body 105 is suspended by the tape member 104 that can be easily broken when the airbag bag body 105 is inflated and deployed.

JP 2007-237894 A

  According to Patent Document 1, the airbag bag body 105 is bolted and fixed to the roof side rail 101 by a plurality of attachment portions 106 provided on the airbag bag body 105, and a pair of provided on the roof side rail 106. By hanging the airbag bag body 105 from the bracket 102 with the tape member 103 and the tape member 104, the airbag bag body 105 can be prevented from partially hanging down.

  However, since the airbag bag body 105 is suspended by the support tape 103 and the tape member 104 wound around the pair of brackets 102 provided on the roof side rail 101, the airbag bag body 105 is roofed by supplying high-pressure gas in an emergency. When the airbag bag 105 is inflated and deployed rapidly between the side rail 101 and the roof trim, the airbag bag body 105 may come into contact with the end portion of the bracket 102 and be caught, thereby preventing smooth deployment. In addition, there is a concern that the airbag bag body 105 that is rapidly inflated and deployed at a high pressure comes into pressure contact with the bracket 102 or is caught and damaged.

  Further, since the airbag bag body 105 is suspended from the pair of brackets 102 by holding the annular support tape 103 and further wrapping the annular bag tape 104, the airbag bag body 105 has many components. There is a concern that the work of hanging the door becomes complicated and the work cost increases.

  Accordingly, an object of the present invention made in view of such a point is to provide a highly reliable curtain airbag device mounting structure that can ensure a smooth inflation and deployment of an airbag bag body with a simple configuration.

The curtain airbag device mounting structure according to claim 1, wherein the airbag bag body in a folded state is disposed along the roof side rail of the passenger compartment, and the airbag bag body is attached to the roof. in the mounting structure of the curtain airbag device that inflates and deploys along the side rails, said Lou full side rail brackets which protrudes into the passenger compartment side, the airbag, the airbag cushion and the bracket The bracket is suspended by an annular tag having a joint portion coupled to the airbag bag body, and the bracket extends to the distal end portion and the distal end portion, and the distal end is coupled to the roof side rail. The tag includes a pair of joints that are interposed between the airbag bag body and a front end portion of the bracket and coupled to the airbag bag body, And a locking portion hanging on the legs of the bracket in annular ends are continuous to the bonding portion of the air bag body is to be pressed against the bracket by interposing the joint in inflation and deployment Features.

  According to this, the airbag bag body is provided with a tag formed in an annular shape by joining the joint portion, and the airbag bag body is good with a simple configuration in which the tag is suspended from a bracket attached to the roof side rail. The manufacturing cost can be reduced.

  On the other hand, when the airbag bag body is inflated and deployed, a tag joint is interposed between the bracket and the airbag bag body that is rapidly inflated and deployed at a high pressure, so that the airbag bag body directly contacts the bracket. Alternatively, pressure contact is not caused, and the airbag bag body is prevented from being damaged or damaged due to contact with the bracket or pressure contact, so that a smooth inflation and deployment can be ensured, and the reliability of the airbag device is improved.

In addition, according to this, the airbag bag body is provided with a simple tag having a pair of joint portions and an annular locking portion, and the airbag bag body is excellent in a simple configuration in which the tag is suspended from the leg portion of the bracket. Retained.

On the other hand, when the airbag bag body is inflated and deployed, a joint portion of a tag is interposed between the tip of the bracket and the airbag bag body that is rapidly inflated and deployed at a high pressure, so that the airbag bag body is directly No contact or pressure contact with the tip end of the bracket is avoided, and damage or damage to the airbag bag body due to contact with or contact with the tip end of the bracket is avoided, thereby ensuring a smooth inflated deployment.

Further, according to this, the airbag bag body that is inflated and deployed is pressed against the bracket via the joint portion of the tag, so that the airbag bag body does not directly contact or press contact with the bracket. The breakage and damage of the airbag bag body due to pressure contact is avoided. Further, the reaction force due to the inflation and deployment of the airbag bag body is received by the bracket, and the airbag bag body can be smoothly inflated and deployed.

The curtain airbag device mounting structure according to claim 2, wherein the airbag bag body in a folded state is arranged along the roof side rail of the passenger compartment, and the airbag bag body is arranged along the roof side rail. In the mounting structure of the curtain airbag device to be inflated and deployed, the airbag bag body is interposed between the airbag bag body and the bracket in a bracket provided on the roof side rail so as to protrude toward the vehicle interior side. The air bag body is suspended by an annular tag having a joint portion coupled thereto, and the joint portion is wound in a roll shape at the front end on the vehicle interior side.

The curtain airbag device mounting structure according to claim 3, wherein the airbag bag body in a folded state is disposed along the roof side rail of the passenger compartment, and the airbag bag body is disposed along the roof side rail. In the mounting structure of the curtain airbag device to be inflated and deployed, the airbag bag body is interposed between the airbag bag body and the bracket in a bracket provided on the roof side rail so as to protrude toward the vehicle interior side. The tag is suspended by an annular tag having a joint portion coupled to the airbag bag body, and the tag has an end-like annular shape through which the tip end portion of the bracket can be inserted, and a belt-like locking portion having a predetermined width. has, locking unit, in the installed state, the strip of one side edge located in the passenger compartment side, locked contact or engagement with the stopper portion formed along the upper edge of the front end portion of the bracket Characterized in that was.

  According to the present invention, the airbag bag body can be satisfactorily held with a simple configuration in which the tag is suspended from the bracket attached to the roof side rail. On the other hand, when the airbag bag body is inflated and deployed, the joint portion of the tag is interposed between the bracket and the airbag bag body that is inflated and deployed, thereby preventing the airbag bag body from being damaged or damaged.

It is the schematic side view which looked at the vehicle interior side part which shows the outline | summary of the attachment structure of the curtain airbag apparatus which concerns on one embodiment of this invention from the vehicle interior side. It is the II section enlarged view of FIG. FIG. 3 is an enlarged sectional view taken along line III-III in FIG. 2. FIG. 3 is an enlarged view of a part VI in FIG. 2. It is a principal part disassembled perspective view of FIG. It is a principal part enlarged view of the airbag bag body which shows the combined state of an airbag bag body and a tag. It is a principal part perspective view which shows the example which suspends an airbag bag body over several brackets. It is a principal part perspective view which shows the other example which hangs an airbag bag body on a bracket. It is a figure which shows the other example of a tag. It is a perspective view which shows the other example of a bracket. It is a principal part perspective view which shows the attachment structure of the conventional curtain airbag apparatus.

  Hereinafter, an embodiment of a curtain airbag device mounting structure according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic side view in which a roof trim is viewed from the side of a passenger compartment showing an outline of a curtain airbag device mounting structure, FIG. 2 is an enlarged view of a portion II in FIG. 1, and FIG. FIG. 4 is an enlarged view of the IV part of FIG. 2, FIG. 5 is an exploded perspective view of the main part of FIG. 4, and FIG. 6 is an airbag showing a combined state of the airbag bag body and the tag. It is a principal part enlarged view of a bag. In the figure, the arrow F indicates the vehicle front direction, and the arrow IN indicates the vehicle width direction inner side.

  As shown in FIG. 1, a front pillar 1, a center pillar 2, and a rear pillar 3 are arranged in order from the front on the side of the passenger compartment, and the upper portions of the front pillar 1, center pillar 2, and rear pillar 3 extend in the longitudinal direction of the vehicle body. Is coupled to the roof side rail 4.

  An airbag bag body 11 of the curtain airbag device 10 is attached from the front pillar 1 to the rear portion of the roof side rail 4. The airbag body 11 is made of a cloth having a substantially rectangular shape that is long in the front-rear direction when inflated and deployed, and is usually folded into a roll that is thinly wound in the up-down direction, and is folded by winding the outer peripheral tape 18 around the outer periphery. Is kept in the state.

  The airbag bag body 11 is provided with a plurality of attachment portions 13 at intervals in the front-rear direction along the upper edge thereof, and the attachment portions 13 are fastened to the side surfaces of the front pillar 1 and the roof side rail 4 with bolts 13a or the like. Provided. A gas introduction part 12 is provided at an intermediate part in the front-rear direction of the airbag bag body 11 and is connected to an inflator 14 attached to the roof side rail 4.

  In the curtain airbag device 10, high-pressure gas is jetted from the inflator 14 into the airbag bag body 11 in an emergency such as a side collision or rollover of the vehicle so that the airbag bag body 11 covers the side surface of the vehicle interior. And inflating and deploying in a curtain shape between the side of the vehicle body and the head of the occupant to protect the occupant's head. The outer peripheral tape 18 wound around the outer periphery of the airbag 11 is cut by the inflation and deployment of the airbag bag body 11 when the airbag bag body 11 is inflated and deployed.

  The airbag bag body 11 attached to the front pillar 1 and the roof side rail 4 in the folded state is covered from the vehicle interior side by a side end 5a of the front pillar trim and the roof trim 5 (not shown). When the airbag bag body 11 is inflated and deployed, the side end 5a of the front pillar trim and the roof trim 5 is pushed away by the airbag bag body 11 that is inflated and deployed, so that the front pillar and the front pillar trim, the roof side rail 4, and the roof trim 5 side. The engagement with the end 5a is easily disengaged and opened, and the inflation and deployment of the airbag bag body 11 is not hindered.

  An assist grip 6 is attached to the vehicle interior side of the roof side rail 4 so as to correspond to the side portions of the front seat and the rear seat. The front end and the rear end of the assist grip 6 are attached via a pair of front and rear brackets 20 provided at positions above the airbag bag body 11 of the roof side rail 4.

  As shown in FIGS. 2 to 5, each bracket 20 has an upper edge 21 a and a lower edge 21 b that extend in the front-rear direction, and a front end and a rear end of the upper edge 21 a and the lower edge 21 b that extend vertically. It has a substantially rectangular plate-like tip portion 21 having a front edge 21c and a rear edge 21d to be connected. A mounting hole 22 for attaching the assist grip 6 is formed at the center of the tip 21.

  The base end is coupled to the back surface of the front end portion 21 along the front edge 21c and the rear edge 21d side, which is smaller than the vertical width Wa of the front end portion 21 and slightly lower than the upper edge 21a of the front end portion 21, respectively. A pair of leg portions 23A, 23B extending in the direction, and the mounting flange portions 24A, 24B joined to the vehicle interior side surface of the roof side rail 4 are bent at the leg ends that are the ends of the leg portions 23A, 23B. It is formed. A stopper portion 25 that extends back and forth along the upper edge 21a on the back surface of the tip portion 21 protruding in a flange shape further upward than the upper edges 23a and 23b of the leg portions 23A and 23B, and prevents the tag 15 described later from falling off. Is formed. In addition, this front-end | tip part 21 and each leg part 23A, 23B can also be formed by bending a board | plate material integrally with the front-end | tip part 21. FIG.

  Each bracket 20 is disposed at a position above the airbag bag body 11 corresponding to the attachment range of the assist grip 6 with a gap in the front and rear sides of the vehicle interior side of the roof side rail 4, and the mounting flanges of the legs 23A and 23B. The parts 24A and 24B are coupled to the vehicle interior side of the roof side rail 4 by spot welding or the like. As shown in FIG. 3, when attaching the assist grip 6, the front and rear of the assist grip 6 overlapped from the vehicle interior side with the roof trim 5 overlapped with the back surface of the roof trim 5 on the front end portion 21 of each bracket 20. The end is attached and fixed to the tip 21 of each bracket 20 with a clip or the like.

  On the other hand, as shown in FIGS. 3, 4, and 5, the portions corresponding to the brackets 20 of the airbag bag body 11 are connected to the leg portions 23 </ b> A and 23 </ b> B of the bracket 20 from the vehicle interior side that is the distal end portion 21 side. A tag 15 formed in a ring shape that can be locked is attached.

  The tag 15 has a cloth band shape having a predetermined width having a front edge 15a and a rear edge 15b. The tag 15 is bridged from above to a pair of leg portions 23A and 23B of each bracket 20, and the side surfaces of the leg portions 23A and 23B from both ends, respectively. A ring-shaped locking portion 16 that can be extended downward along the line, and a substantially rectangular shape that extends from the respective end portions of the locking portion 16 toward each other, and is folded toward the vehicle interior side to extend substantially in parallel. The joint portions 17A and 17B are continuously formed. Further, the front ends 17Aa and 17Ba of the joints 17A and 17B protruding from the front edge 15a of the locking part 16 toward the vehicle interior side are wound in a roll shape and are formed in a round bar shape to be thick in the vertical direction.

  As shown in FIG. 6, the tag 15 is configured so that the distance La between the outer edges 17 </ b> Ab and 17 </ b> Bb of the joint portion 17 </ b> A and the joint portion 17 </ b> B is the front-rear width of the tip portion 21 of the bracket 20. In the state where the separation distance Lb between the inner edges 17Ac and 17Bc which are separated from each other by more than Wb and are adjacent to each other is set smaller than the front-rear width Wb of the distal end portion 21, the airbag is overlapped with the upper portion of the airbag body 11. Join. The airbag body 11 is wound in a roll shape from below and folded, and the outer peripheral tape 18 is wound around the outer periphery and maintained in a folded state.

  As described above, the airbag bag body 11 is disposed so as to extend in the front-rear direction along the roof side rail 4 from the front pillar 1, and a plurality of attachment portions 13 provided along the upper edge thereof are front pillars. 1 and the roof side rail 4 are fixed to the side of the passenger compartment by mounting bolts 13a.

  In the portion corresponding to the bracket 20 provided on the roof side rail 4, as shown in FIG. 3, the locking portion 16 of the tag 15 formed in an annular shape is connected to the upper edge 21 a from the front end portion 21 side which is the vehicle interior side. And the roof side rail 4 are inserted between the legs 23A and 23B from above, and extended downward along the legs 23A and 23B to be hung on both legs 23A and 23B. The tag 15 suspended over the leg portions 23A and 23B has its front edge 15a in contact with or locked to a stopper portion 25 formed along the upper edge 21a of the distal end portion 21 of the bracket 20. The bracket 20 is prevented from falling off and is suspended in a stable state.

On the other hand, each joint portion 17A, 17B of the tag 15 is interposed between the lower edge 21b of the tip end portion 21 of the bracket 20 and the airbag bag body 11, and in particular, the airbag bag body 11 is inflated and deployed rapidly at a high pressure. The front corner portion 21A formed by the lower edge 21b and the front edge 21c of the distal end portion 21 where local pressure contact is a concern is covered from the airbag bag body 11 side by the joined portion 17A, and the joined portion 17B is the distal end. The rear corner portion 21B formed by the lower edge 21b and the rear edge 21d of the portion 21 is covered from the airbag bag body 11 side. Further, the tips 17Aa of the joint portions 17A and 17B wound in a roll shape and formed in a round bar shape are slightly between the lower edge 21b of the tip portion 21 and the airbag bag body 11 or slightly lower than the lower edge 21b. Be placed.

According to the present embodiment configured as described above, the airbag bag body 11 is provided with a plurality of attachment portions 13, and a simple tag 15 is provided corresponding to the assist grip 6. A part of the airbag bag body 11 is easily hung and deformed with a simple structure that is suspended from an assist grip mounting bracket 20 that protrudes and is mounted on the roof side rail 4 corresponding to the assist grip 6 with a wide interval. Can be prevented and maintained well. Thereby, when attaching the roof trim 5 , the airbag bag body 11 does not become obstructive, and can attach the roof trim 5 efficiently. In addition, by using the bracket 20 for attaching the existing assist grip 6 to suspend the airbag bag body 11, there is no need to provide a dedicated member for suspending the airbag bag body 11 on the roof side rail 4. In addition, by attaching the tag 15 having an extremely simple shape to the airbag bag body 11, a simple configuration and a reduction in manufacturing cost can be obtained.

  In an emergency such as vehicle side impact or vehicle rollover, when the high-pressure gas is ejected from the inflator 14 into the airbag bag body 11 and the airbag bag body 11 is rapidly inflated and deployed at a high pressure, the tip of the bracket 20 The joint portion 17A, 17B of the tag 15 is interposed between the lower end edge 21b of the portion 21 and the airbag bag body 11 that is inflated and deployed, and the airbag bag body 11 is in pressure contact with the tip portion 21 that is the tip of the bracket 20. Thus, the airbag bag body 11 itself does not directly contact the bracket 20. In particular, when the airbag bag body 11 is inflated and deployed, the airbag bag body 11 may be damaged without directly contacting the front corner portion 21A or the rear corner portion 21B of the front end portion 21 where local strong pressure is a concern. Damage can be avoided and smooth expansion can be ensured. Further, since the airbag bag body 11 is in pressure contact with the bracket 20 via the joint portions 17A and 17B of the tag 15, the reaction force due to the inflation and deployment of the airbag bag body 11 is received by the bracket 20 and is stable. Expansion and deployment of the bag 11 can be ensured.

  Further, when the airbag bag body 11 is inflated and deployed at a high pressure suddenly, the airbag bag body 11 is inflated and deployed downward by the tips 17Aa and 17Ba of the round bar-like joint portions 17A and 17B wound in a roll shape. When the airbag bag 11 is deployed and inflated, the roof trim 5 is separated from the bracket 20. For example, the inflating and deploying force in the vehicle interior direction indicated by the arrow F in FIG. It is possible to suppress the problem of falling off 20 and scattering toward the vehicle interior.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the invention. For example, the width of the tag 15 is set to be slightly larger than the separation distance between the roof side rail 4 and the back surface of the front end portion 21 serving as the stopper 25 of the bracket 20, and the tag 15, the rear edge 15 b and the front edge 15 a are respectively set to the roof side rail. 4 and the width of the front end portion 21 are set so as to be able to come into contact with each other, and are slightly bent between the roof side rail 4 and the front end portion 21 so as to be bridged over the leg portions 23A and 23B. 15 movements can be suppressed.

  In addition, for example, in the above embodiment, the tag 15 is locked corresponding to each bracket 20, but a perspective view is shown in FIG. 7, and the bracket 20 and the tag 15 are the same as those corresponding to FIGS. Although a detailed description is omitted with reference numerals, a plurality of, for example, a pair of brackets 20 that are arranged apart from each other, the tags 15 may be suspended over the legs 15A and 23B, and the airbag 11 may be suspended. it can.

  Further, as shown in a perspective view corresponding to FIG. 6 in FIG. 8, a locking member 26 such as a clip protruding from the roof side rail 4 is provided between the leg portions 23 </ b> A and 23 </ b> B of the bracket 20. By locking the locking portion 16 of the tag 15 spanned between the portions 23A and 23B to the locking member 26, tension is applied to the tag 15 to suppress the slackness of the tag 15, so that the airbag bag body 11 partial sagging can be more reliably reduced. In addition, it is possible to suppress the slack of the tag 15 by fixing the locking portion 16 to the roof side rail 4 with a clip or the like instead of the locking member 26.

  Moreover, in the said embodiment, although joined part 17A and 17B of the tag 15 was spaced apart and formed in the airbag bag body 11, the airbag bag body 11 and the tag 15 are shown to Fig.9 (a), Further, as shown in a perspective view in a state of being suspended from the bracket 20 in FIG. 9B, an annular shape that overlaps the vicinity of both ends of the belt-like tag 15 and is engaged with the leg portions 23 </ b> A and 23 </ b> B of the bracket 20. The engagement portion 16 and the end portion of the engagement portion 16 and stitched to the airbag bag body 11 so as to be interposed between the lower edge 21b of the distal end portion 21 of the bracket 20 and the airbag bag body 11. Portions 17A and 17B can be formed.

  Furthermore, although the bracket 20 in the said embodiment showed the example provided with a pair of leg part 23A, 23B, as shown in FIG. 23A and 23B may be provided, and a leg portion 23C extending from the central portion of the upper edge 21a may be provided. In this case, a stopper portion 25 for preventing the tag 15 from dropping off is formed at the corner portions 21C and 2D on both sides of the leg portion 23C at the distal end portion 21. Similarly, the number of leg portions can be changed to one or more as required.

  The bracket 20 for attaching the assist grip 6 has been described as an example. However, the bracket 20 is not limited to the assist grip 6 and can be applied to a bracket for attaching other outfitting parts. It can also be attached to a rail.

4 Roof Side Rail 10 Curtain Airbag Device 11 Airbag Bag Body 14 Inflator 15 Tag 16 Locking Part 17A, 17B Joint Part 20 Bracket 21 Tip Part 23A, 23B Leg Part 24A, 24B Mounting Flange Part

Claims (3)

In the mounting structure of the curtain airbag device in which the airbag bag body in a folded state is arranged along the roof side rail of the passenger compartment, and the airbag bag body is inflated and deployed along the roof side rail.
On the bracket provided on the roof side rail so as to protrude toward the vehicle interior side,
The air bag body is suspended by an annular tag having a joint portion interposed between the air bag body and the bracket,
The bracket has a tip portion and a leg portion that extends to the tip portion and the tip is coupled to the roof side rail,
The tag includes a pair of joint portions that are interposed between the airbag bag body and a distal end portion of the bracket and are coupled to the airbag bag body, and an annular shape having both ends continuous with the pair of joint portions. A locking portion that is suspended from the leg portion of the bracket,
The curtain airbag device mounting structure, wherein the airbag bag body is in pressure contact with the bracket via the joining portion in the inflated and deployed state. In the mounting structure of the curtain airbag device in which the airbag bag body in a folded state is arranged along the roof side rail of the passenger compartment, and the airbag bag body is inflated and deployed along the roof side rail.
On the bracket provided on the roof side rail so as to protrude toward the vehicle interior side,
The air bag body is suspended by an annular tag having a joint portion interposed between the air bag body and the bracket,
The junction structure has a curtain airbag device mounting structure in which a front end of the vehicle interior is wound in a roll shape. A folded airbag bag body is arranged along the roof side rail of the passenger compartment,
In the mounting structure of the curtain airbag device for inflating and deploying the airbag bag body along the roof side rail,
A joint portion is coupled to the airbag bag body with the airbag bag body interposed between the airbag bag body and the bracket on a bracket provided on the roof side rail so as to protrude toward the vehicle interior side. It is hung by an annular tag ,
The tag has an end-like annular shape through which the tip of the bracket can be inserted, and a band-shaped locking portion having a predetermined width,
The locking portion is characterized in that, in the installed state, one side edge of the belt-like shape located on the vehicle interior side is in contact with or locked to a stopper portion formed along the upper edge of the tip end portion of the bracket. The curtain airbag device mounting structure.