JP6314889B2 - Head protection airbag device - Google Patents

Description

  The present invention relates to a head protecting airbag device including an airbag that is folded and housed on the upper edge side of the window inside the vehicle, and that expands and inflates so as to cover the vehicle interior of the window by flowing an inflating gas into the inside. In particular, the present invention relates to a suitable head protecting airbag device at the time of oblique collision in which an impact force acts obliquely forward or obliquely rearward.

  2. Description of the Related Art Conventionally, as a head protection airbag device that can protect an occupant's head at the time of an oblique collision, two vertical cell portions that are configured as a bar shape in the vertical direction are provided on the front end side when the inflation is completed. There is a configuration in which the vertical cell portions are mounted on the vehicle in a state where the vertical cell portions are folded back at a partition portion disposed between the longitudinal cell portions so as to overlap in the vehicle interior / exterior direction. In this conventional head protection airbag device, the two vertical cell portions arranged on the front end side when the inflation is completed are arranged so as to overlap in the vehicle interior / exterior direction when the airbag is completely inflated. It is supposed to be arranged so as to protrude larger on the vehicle inner side than a region arranged on the rear side of the part (see, for example, Patent Document 1).

JP 2008-1197 A

  However, in the conventional head protection airbag device, the two vertical cell portions are connected to each other over the entire upper and lower regions, and are folded back so as to be simply stacked in the vehicle interior / exterior direction (vehicle width direction). Because it is mounted on the vehicle, the vertical cell part that is arranged inside the vehicle receives the occupant's head that moves diagonally from the rear in the event of an oblique collision. In some cases, the head of the passenger could not be protected properly.

  The present invention solves the above-described problems, and provides a head protection airbag device capable of accurately protecting the head of an occupant during an oblique collision by an area disposed on the edge side in the front-rear direction when inflation is completed. The purpose is to do.

The head protection airbag device according to the present invention includes an airbag that is folded and stored on the upper edge side of the window inside the vehicle,
The airbag has an upper edge side attached and fixed to the vehicle body side, and has an inboard side wall portion located on the inner side of the vehicle and an outer side wall portion located on the outer side of the vehicle when the inflation is completed, and has an inflating gas inside. A head protection airbag device configured to include an inflating shielding part that expands and inflates so as to cover the inside of the window by flowing in,
In the expansion shield, the region on the edge side in the front-rear direction is
While arranging the coupling part constituted by combining the closed parts constituted by coupling the vehicle inner wall part and the vehicle outer wall part,
As a configuration in which the closed parts before joining of the joint parts are arranged apart from each other on the front-rear direction side, and the region between the close parts is arranged on the vehicle inner side and joined together.
When expansion is complete,
Adjacent to the coupling part, a central part that expands at a position on the central side in the front-rear direction of the expansion shielding part from the coupling part,
Adjacent to the coupling part, an edge side part that expands on the edge side in the front-rear direction than the coupling part,
In the region between the closed parts, the projecting part that is supported by the vehicle inner wall part in the center side part and the edge side part and protrudes and inflates to the vehicle inner side,
It is set as the structure provided with.

  In the head protection airbag device of the present invention, when the inflation of the airbag is completed, the region disposed on the edge side in the front-rear direction in the inflation shielding portion includes a projecting portion that projects and inflates toward the vehicle interior side. In the region of the expansion shielding portion, this projecting portion is configured such that the closed portion constituted by combining the vehicle inner wall portion and the vehicle outer wall portion is disposed on the vehicle inner side, and the region between the closed portions is disposed on the vehicle inner side. It is the structure which protrudes and arrange | positions at the vehicle inner side by combining. Then, on both the front and rear sides of the projecting part, the edge side part and the central part are disposed so as to be adjacent to each other. Thus, the protruding portion is supported. Therefore, in the head protection airbag device according to the present invention, when the airbag is completely inflated, the protruding portion is maintained in the vehicle interior side by the edge side portion and the central side portion arranged adjacent to each other in the front and rear direction. In addition, when the head of an occupant moving diagonally forward or diagonally behind the vehicle is received by the protruding part and the central part at the time of the oblique collision, the diagonally forward of the protruding part Alternatively, the vehicle rear side obliquely behind can be accurately supported by the edge side part, and the protruding part is difficult to shift back and forth, and the head of the occupant can be smoothly protected by the protruding part. Further, in the head protection airbag device of the present invention, the edge side portion that supports the vehicle outside of the protruding portion is also inflated by inflating the inflation gas into the inside, so that the cushion action of this edge side portion is also achieved. In addition, the head of the occupant can be restrained accurately.

  Therefore, in the head protecting airbag device of the present invention, the head of the occupant can be protected accurately during the oblique collision by the region arranged on the edge side in the front-rear direction when the inflation is completed.

  Further, in the head protection airbag device of the present invention, if the closing portions are each configured as a line arranged substantially along the vertical direction, the projecting portion and the end portion are each completely inflated. Sometimes it swells in a generally bar shape. Further, each of the closing portions may be configured as a substantially circular shape, and further, the linear closing portion may be configured to extend from the upper edge or the lower edge of the airbag when the inflation is completed. .

It is the schematic front view which looked at the head protection airbag apparatus which is one Embodiment of this invention from the vehicle inside. It is a front view which shows the state which unfolded flat the airbag used with the head protection airbag apparatus of embodiment. FIG. 3 is a partial enlarged cross-sectional view showing a state where the airbag of FIG. 2 is inflated alone, and shows a III-III portion of FIG. 2. FIG. 4 is a partial enlarged cross-sectional view showing a state where the airbag of FIG. 2 is inflated alone, showing the IV-IV portion of FIG. 2. FIG. 3 is a front view showing a state in which the airbag structure, the connecting member, and the attachment portion base material are arranged in the airbag of FIG. 2. In the head protection airbag device of an embodiment, it is the outline front view which looked at the state where the airbag completed inflation from the car inside. In the head protection airbag device of the embodiment, it is a schematic cross-sectional view along the front-rear direction showing a state in which the airbag is completely inflated. It is a partial expanded front view which shows the airbag of the other form of this invention, and shows the state before formation of a connection part. It is a partial expanded front view which shows the airbag of the further another form of this invention, and shows the state before formation of a connection part. It is a partial expanded front view which shows the airbag of the further another form of this invention, and shows the state before formation of a connection part. It is a partial expanded front view which shows the airbag of the further another form of this invention, and shows the state before formation of a connection part. It is a partial expanded front view which shows the airbag of the further another form of this invention, and shows the state before formation of a connection part. It is a partial expanded front view which shows the airbag of the further another form of this invention, and shows the state before formation of a connection part. It is a partial expanded front view which shows the airbag of the further another form of this invention, and shows the state before formation of a connection part. It is a partial expanded front view which shows the airbag of the further another form of this invention, and shows the state before formation of a connection part. It is a partial expanded front view which shows the airbag of the further another form of this invention, and shows the state before formation of a connection part. It is a partial expanded front view which shows the airbag of the further another form of this invention, and shows the state before formation of a coupling | bond part, and the state after formation of a coupling | bond part. It is a partial expanded front view which shows the airbag of the further another form of this invention, and shows the state before formation of a coupling | bond part, and the state after formation of a coupling | bond part.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the head protection airbag device M of the embodiment is mounted on a two-row seat type vehicle V having two windows (side windows) W1 and W2. In the embodiment, a head protection airbag device M that is mounted on the upper edge side of the windows W1, W2 on the right side (the vehicle outer side O) of the driver seat DS in the right-hand drive vehicle will be described. In the case of the embodiment, as shown in FIG. 1, the head protection airbag device M includes an airbag 20, an inflator 14, mounting brackets 11 and 16, and an airbag cover 9. As shown in FIG. 1, the airbag 20 has a rear pillar portion RP that passes from the lower edge side of the front pillar portion FP to the lower edge side of the roof side rail portion RR on the upper edge side of the windows W1 and W2 on the inner side of the vehicle V. Is folded and stored up to the area above.

  As shown in FIGS. 1 and 7, the airbag cover 9 is formed from the lower edges of the front pillar garnish 4 disposed in the front pillar portion FP and the roof head lining 5 disposed in the roof side rail portion RR. ,It is configured. The front pillar garnish 4 and the roof head lining 5 are made of synthetic resin and fixed to the vehicle inner side I of the inner panel 2 on the body 1 (vehicle body) side in the front pillar portion FP and the roof side rail portion RR, respectively. Has been. Further, the airbag cover 9 is pushed by the airbag 20 so as to cover the inside of the airbag 20 that is folded and stored, and to allow the airbag 20 to be protruded downward in the interior of the vehicle when deployed. It is configured to be openable to the inside I of the vehicle.

  The inflator 14 supplies inflation gas to the airbag 20, and as shown in FIG. 1, as a substantially cylindrical cylinder type, a gas discharge port (not shown) capable of discharging inflation gas is provided on the tip side. It is arranged. The inflator 14 is inserted into a gas inlet portion 27 (to be described later) of the airbag 20 including the vicinity of the gas discharge port, and the airbag 15 is used with a clamp 15 disposed on the outer peripheral side of the gas inlet portion 27. 20 is connected. Further, the inflator 14 uses an attachment bracket 16 for holding the inflator 14 and a bolt 17 for fixing the attachment bracket 16 to the inner panel 2 on the body 1 side, so that (See FIG. 1). The inflator 14 is electrically connected to a control device (not shown) of the vehicle V via a lead wire (not shown), and the control device detects a side collision, oblique collision, offset collision, rollover, etc. of the vehicle V. At this time, an operation signal from the control device is inputted to be operated.

  Each mounting bracket 11 is composed of two sheet metal plates, and is attached to each mounting portion 59, 62 so as to sandwich each mounting portion 59, 62 (to be described later) of the airbag 20 from the front and back. 12, each attachment portion 59, 62 is attached and fixed to the inner panel 2 on the body 1 side (see FIG. 7).

  As shown in the two-dot chain line in FIG. 1 and FIG. 6, the airbag 20 is caused to flow inflating gas from the inflator 14 and expand from the folded state to open the windows W1, W2 and the windows W1, W2. The pillar garnish 6 covering the vehicle inner side of the center pillar portion CP disposed between the two and the pillar garnish 7 covering the vehicle inner side of the rear pillar portion RP disposed on the rear side of the window W2 is expanded so as to cover the vehicle inner side. It is configured to expand. In the case of the embodiment, as shown in FIGS. 2 to 4, the airbag 20 is inflated so as to cover the vehicle inner side I of the windows W <b> 1 and W <b> 2 when inflation is completed, and the upper edge 21 a of the inflation shield 21. A plurality of mounting portions 59 disposed along the front-rear direction on the side, and a connecting member 61 disposed so as to extend from the front end 21c side of the expansion shielding portion 21, and the expansion shielding portion 21 is implemented. In the case of the form, when the expansion is completed, the expansion completion shape can be covered substantially along the longitudinal direction in the front-rear direction so that the vehicle inner side from the window W1 through the center pillar portion CP and the window W2 to the front side of the rear pillar portion RP can be covered. It is a rectangular plate. In the case of the embodiment, the expansion shielding part 21 is configured from an area of the airbag 20 excluding the attachment part 59, the gas inlet part 27, and the connecting member 61.

  In the case of the embodiment, the airbag 20 includes an airbag component 23 manufactured by bag weaving using polyamide yarn, polyester yarn, or the like, and a connecting member 61 and an attachment portion that are separate from the airbag component 23. It is comprised from the base material 66 (refer FIG. 5). As shown in FIG. 5, the airbag constituting body 23 includes a vehicle interior side wall portion 24 a located on the vehicle interior side I when the inflation is completed, and a vehicle exterior wall portion 24 b located on the vehicle exterior side O. A gas inflow portion 24 that expands by inflating an inflow gas into the interior so as to separate the vehicle outer wall portion 24b and the vehicle outer wall portion 24b from each other, and a vehicle inner wall portion 24a and a vehicle outer wall portion 24b are combined to form an expansion And a non-inflow portion (closed portion) 45 through which gas does not flow.

  In the case of the embodiment, the gas inflow portion 24 is a main inflatable portion 25 (primary inflated portion) that inflates by inflating with an inflating gas discharged from the inflator 14 so that the head of the occupant can be protected even when the vehicle V rolls over. Expansion part), the front side secondary expansion part 31, the center side secondary expansion part 36, and the rear side secondary expansion part 37 (secondary expansion part) which are communicated with the main expansion part 25 and complete the expansion after the expansion of the main expansion part 25 is completed. And communication portions 39, 40, 41, and 42 for communicating the main expansion portion 25 with the front side sub expansion portion 31, the center side sub expansion portion 36, and the rear side sub expansion portion 37, respectively. It is configured. And in the case of embodiment, as shown to FIG.2, 5, the airbag structure 23 (expansion shielding part 21) is the main expansion part 25, the front side subinflation part 31, the center side subinflation part 36, the rear side subassembly. Upper circular closing portions 48F, 48R, lower circular closing portions 49F, 49R, thickness regulating portions 56, 57, main expansion portion 25, front side sub expansion portion 31, and center side sub-portions arranged in the region of expansion portion 37 Except for a few areas of the end side partition part 51 and the central side partition part 52 that partition the expansion part 36 and the rear side sub-expansion part 37, the expansion gas is caused to flow into the interior over substantially the entire surface so as to expand. It is configured.

  The main expansion portion 25 includes a gas guide channel 26, a gas inlet portion 27, a front seat protection portion 28, and a rear seat protection portion 29.

  The gas guide channel 26 is disposed over substantially the entire region before and after the region of the main expansion portion 25 so as to extend substantially along the front-rear direction on the upper edge 21 a side of the expansion shielding portion 21. It is configured to guide the discharged inflation gas to the front seat protection section 28 and the rear seat protection section 29 disposed below the gas guide channel 26. In the case of the embodiment, the inflator 14 is located at a substantially central position before and after the gas guide channel 26 (a position shifted backward from the front and rear center in the airbag structure 23 in a flatly deployed state, see FIG. 5). Is connected to the gas guide channel 26 so as to protrude upward from the gas guide channel 26 (expansion shield 21). In the case of the embodiment, the gas inflow port portion 27 is formed so as to be inclined rearwardly with respect to the gas guide channel 26, and the rear end 27a side is opened so that the inflator 14 can be inserted. And the gas inflow port part 27 will be connected with the inflator 14 by fitting the clamp 15 in the outer peripheral side in the state which inserted the inflator 14 inside. In the airbag 20 of the embodiment, a separate inner tube (not shown) for increasing heat resistance is provided in a portion from the gas inlet portion 27 to the portion immediately below the gas inlet portion 27 in the gas guide channel 26. Is disposed (see FIG. 2).

  The front seat protection unit 28 is disposed on the side of the front seat (driver's seat DS) when the inflation is completed, and when the airbag 20 completes the inflation in a side collision, the front seat (driver's seat DS). ) Is a part for protecting the head H of the occupant P (driver) seated in the vehicle. The rear seat protection unit 29 is disposed on the side of the rear seat when the inflation is completed, and protects the head of the occupant seated in the rear seat when the airbag 20 completes the inflation in a side collision. It is a part to do.

  The front side secondary expansion part 31 is disposed on the front end 21c side of the expansion shielding part 21 so as to be adjacent to the front side of the main expansion part 25 (the front seat protection part 28). The front side sub-expansion portion 31 is partitioned from the front seat protection portion 28 adjacent to the rear side by an end side partition portion 51 described later. Further, the front side sub-inflatable portion 31 is communicated with the front seat protecting portion 28 by a communication portion 39 opened on the rear upper end side and a communication portion 40 opened on the rear lower end side. These communication portions 39 and 40 are configured so that the opening width dimension is set small, and the start of the inflow of the inflation gas into the front side sub-expansion portion 31 is delayed as compared with the front seat protection portion 28. .

  Further, as shown in FIG. 5, the front side sub-inflatable portion 31 joins the vehicle interior side wall portion 24a and the vehicle outer side wall portion 24b to an internal region away from the peripheral edge in a state where the airbag structure 23 is flatly deployed. A non-inflow portion 45 (closed portion) configured as described above is disposed. In the case of the embodiment, in the region of the front side sub-inflatable portion 31, two upper circular closing portions 48F and 48R that are spaced apart on the front and rear direction side on the upper side, and immediately below the upper circular closing portions 48F and 48R, respectively. Two lower circular closing portions 49F and 49R to be disposed are disposed. As shown in FIGS. 3 and 4, the front side sub-inflating portion 31 includes the upper circular closing portions 48F and 48R, the lower circular closing portions 49F and 49R, and the upper circular closing portions 48F and 48R, respectively. A region between the lower circular closing portions 49F and 49R is arranged on the vehicle interior side and is combined. That is, the front side sub-inflatable portion 31 has the vehicle interior side wall portion 24a and the vehicle outer side wall portion 24b overlapped with each other in the front-rear direction intermediate portion between the upper circular closed portions 48F and 48R and the lower circular closed portions 49L and 49R. In this state, the upper circular closing portions 48F and 48R, which are arranged so as to overlap each other while being pinched on the vehicle inner side I, are folded at the portion of the crease CL1 (see FIG. 5), and the upper coupling is performed by sewing. Part 64 is formed, and similarly, the lower circular closure parts 49F and 49R arranged in an overlapping manner are sewn together to form the lower joint part 65, thereby partially joining the inner region, It is configured.

  3 and 4, when the airbag 20 is completely inflated, the front side sub-inflation part 31 is adjacent to the upper coupling part 64 and the lower coupling part 65, and is connected to the upper coupling part 64 and the lower coupling part 65. The upper side coupling portion 64 is adjacent to the central side portion 32 that is inflated at a position on the center side in the front-rear direction of the expansion shielding portion 21 (front seat protection portion 28 side), the upper coupling portion 64, and the lower coupling portion 65. , An edge side portion 33 that expands on the front end side from the lower coupling portion 65, and a protruding portion 34 that is supported by the vehicle inner side wall portion 24 a in the center side portion 32 and the edge side portion 33 and protrudes toward the vehicle inner side I to expand. It is set as the structure provided with. In the state where the airbag structure 23 is flatly deployed, as shown in FIG. 5, the central portion 32 includes an upper circular closing portion 48R, a lower circular closing portion 49R arranged on the rear side, and an end partitioning portion. 51, and the edge side portion 33 is located between an upper circular closing portion 48F and a lower circular closing portion 49F arranged on the front side and a portion on the front end side of the peripheral edge portion 46 described later. The projecting portion 34 is composed of a region between the upper circular closing portions 48F and 48R and a region between the lower circular closing portions 49F and 49R. In the case of the embodiment, in the region between the upper coupling portion 64 and the lower coupling portion 65, the protruding portion 34 expands by folding the vehicle outer wall portion 24b inside (see FIG. 4). Furthermore, in the airbag 20 of the embodiment, the front side sub-inflation part 31 is inflated by mainly flowing the inflation gas into the interior from the front seat protection part 28 via the upper communication part 39. In the case of the embodiment, corresponding to the flow of the expansion gas, from the central side portion 32 arranged on the rear side (front seat protection portion 28 side), in the order of the protruding portion 34 and the edge side portion 33, Sequential expansion will occur.

  Further, in the case of the embodiment, as shown in FIG. 6, the front side sub-inflating part 31 is arranged with the upper end 31 a on the vehicle inner side I of the front pillar part FP arranged on the front edge side of the window W <b> 1 when the inflation is completed. It is configured so that. Further, the front side sub-inflation part 31 is in a state in which the steering wheel airbag 70 and the steering wheel airbag 70 mounted on the steering wheel 68 in front of the driver seat DS are completely inflated. It expand | swells so that it may overlap with (refer FIG. 6, 7). Specifically, the front side sub-expansion portion 31 is configured so that the protruding portion 34 is disposed close to the rear side on the right edge side of the ring portion 68b of the steering wheel 68 when the expansion is completed.

  As shown in FIGS. 2 and 5, the center side sub-expansion portion 36 is an area behind the front seat protection portion 28 in the main expansion portion 25 and below the gas guide channel 26. It arrange | positions adjacent to the protection part 28 for front seats so that it may be arrange | positioned. In the case of the embodiment, the center side sub-inflating portion 36 is communicated with the front seat protection portion 28 by a communication portion 41 opened to the rear end side of the front seat protection portion 28. This communication portion 41 is also set to have a small opening width dimension, and is configured to delay the start of inflow of the inflation gas into the central side sub-expansion portion 36 relative to the front seat protection portion 28. In the case of the embodiment, the rear side sub-expansion part 37 is arranged so as to fill a lower region of the gas guide channel 26 between the center side sub-expansion part 36 and the rear seat protection part 29. The main inflating portion 25 is disposed adjacent to the rear seat protecting portion 29 (see FIGS. 2 and 5). In the case of the embodiment, the rear sub-inflating portion 37 is communicated with the rear seat protection portion 29 by a communication portion 42 disposed on the front end side of the rear seat protection portion 29. The communication portion 42 is also set to have a small opening width dimension, and is configured to delay the start of the flow of the inflation gas into the rear side sub-expansion portion 37 relative to the rear seat protection portion 29.

  The non-inflow portion 45 (closed portion) includes a peripheral edge portion 46 constituting the outer peripheral edge of the gas inflow portion 24, upper circular closing portions 48F and 48R, and a lower circular closing portion 49F arranged in the region of the gas inflow portion 24. 49R, end side partition 51, center side partition 52, and thickness regulating portions 56, 57.

  The peripheral edge portion 46 is arranged so as to surround the periphery of the gas inflow portion 24 over the entire circumference except for the rear end 27a side of the gas inlet portion 27.

  As described above, the upper circular closing portions 48F and 48R and the lower circular closing portions 49F and 49R are arranged in the region of the front side sub-inflation portion 31 in the airbag structure 23 in a flatly deployed state. The shape is substantially circular, and two pieces are arranged apart from each other in the front-rear direction. The lower circular closing portions 49F and 49R are disposed at positions directly below the upper circular closing portions 48F and 48R, respectively. More specifically, the upper circular closing portions 48F and 48R and the lower circular closing portions 49F and 49R are arranged at positions that divide the front auxiliary expansion portion 31 into approximately three equal parts on the vertical direction side. Further, in the case of the embodiment, the upper circular closing portions 48F and 48R and the lower circular closing portions 49F and 49R are separated from each other by a vertical distance between the upper circular closing portions 48F and 48R and the lower circular closing portions 49F and 49R. Are arranged so as to substantially coincide with the separation distance. As described above, the upper circular closing portions 48F and 48R and the lower circular closing portions 49F and 49R have the folds CL1 in the state where the inner wall portion 24a and the outer wall portion 24b are overlapped with each other. The upper coupling portion 64 and the lower coupling portion 65 are formed in a state where the upper coupling portion 64 and the lower coupling portion 65 are formed in a state of being folded at the site and arranged on the vehicle inner side I.

  The end side partition part 51 partitions the front side sub-inflating part 31 and the front seat protection part 28. In the case of the embodiment, the upper and lower end sides are separated from the peripheral edge part 46, and the upper end side is rearward. It is configured as a substantially inverted J shape that is curved so as to face toward the surface. Moreover, in the airbag 20 of embodiment, the connection member 61 will be connected by the base part 61a side to the area | region below this end side division part 51. FIG. The end-side partition 51 is configured such that the upper end 51a side is positioned above a horizontal bar 54 described later in the center-side partition 52 (see FIG. 2).

  The central partition section 52 has a substantially T-shaped outer shape, and includes a vertical bar section 53 that partitions the central side sub-expansion section 36 and the rear side sub-expansion section 37, and a gas guide channel 26 below. And a horizontal bar portion 54 constituting the edge side. The vertical bar portion 53 has a substantially bar shape that extends upward in the vertical direction from a portion on the lower edge side of the peripheral edge portion 46. The horizontal bar portion 54 is formed in a substantially bar shape extending from the upper end of the vertical bar portion 53 to the front and rear. Are partitioned from the gas guide channel 26. On the front end side of the horizontal bar portion 54, a front seat protection portion 28 and a central side sub-expansion portion 36 are defined and projecting while curving downward so as to regulate the thickness of this region. A curved partition portion 54a is disposed.

  The thickness restricting portion 56 divides a region on the lower edge side of the front seat protecting portion 28 and the center side sub-inflating portion 36 at the boundary portion between the front seat protecting portion 28 and the center side sub inflating portion 36. , Protruding from the lower edge side portion of the peripheral edge 46 toward the front upper side. The thickness restricting portion 56 is formed so as to protrude upward from a portion on the lower edge side of the peripheral edge portion 46 in the vicinity of the boundary portion between the rear side sub-inflating portion 37 and the rear seat protecting portion 29. And in the airbag 20 of embodiment, the clearance gap between the upper end side of the end side division part 51 and the upper edge side of the peripheral part 46 comprises the communication part 39, and the lower end side and peripheral part of the end side division part 51 are comprised. A gap between the lower edge side of 46 constitutes the communicating portion 40. Further, the gap between the curved partition portion 54a and the thickness regulating portion 56 in the horizontal bar portion 54 of the central side partition portion 52 constitutes the communication portion 41, and the rear end side portion and the thickness of the horizontal bar portion 54. A gap between the restriction portion 57 and the communication portion 42 is formed.

  The attachment portion 59 is composed of the airbag constituting body 23 and a separate attachment portion base material 66. The attachment portion base material 66 shown in FIG. It is sewn using a suture thread on the edge side. A plurality of attachment portions 59 are arranged along the front-rear direction on the upper edge 21a side of the expansion shielding portion 21, and are formed at six locations in the embodiment. Each attachment portion 59 is configured to be attached to the inner panel 2 on the body 1 side using the attachment bracket 11 and the bolt 12. In the case of the embodiment, in the attachment portion 59, the front attachment portion 59F arranged in the region of the front sub-expansion portion 31 is set to have a larger upward protrusion than the other attachment portions 59. Specifically, the front attachment portion 59F is disposed in the region of the central side portion 32 in the front sub-expansion portion 31, and has a configuration in which the upper end side is fixed to the inner panel 2 in the vicinity of the upper end of the front pillar portion FP. Has been. The front attachment portion 59F has a length dimension such that when the airbag 20 is completely inflated, as shown in FIG. 6, the upper end 31a side of the front auxiliary inflation portion 31 protrudes from the front pillar garnish 4, It is set to a dimension that can be arranged so as to cover the inside I of the pillar garnish 4. In the embodiment, the attachment portion base 66 is also formed of a woven fabric made of polyamide yarn, polyester yarn, or the like.

  The connecting member 61 is formed from a woven fabric made of polyamide yarn, polyester yarn, or the like as a separate body from the airbag component 23, and is connected to the front end 21 c side of the expansion shielding portion 21. In the case of the embodiment, the connecting member 61 is sewn (coupled) with the base portion 61 a side to the vehicle outer surface of the end side partition portion 51, so that when the airbag 20 is completely inflated, It is arrange | positioned at the vehicle outer side O, and is made into the substantially fan shape made narrow by extending the external shape to the front-end | tip 51b side. Further, the connecting member 61 is fixedly attached to the inner panel 2 on the body 1 side at the front pillar portion FP at the front end 61b side using the mounting bracket 11 and the bolt 12 in the same manner as the mounting portion 59. A mounting portion 62 is provided. In the airbag 20 of the embodiment, when the inflation is completed, a tension is generated in the connecting member 61 substantially along the front-rear direction, and the front side sub-inflation part 31 is stretched and arranged in a state where the tension is generated. The vehicle exterior O is supported by the connecting member 61 (see FIG. 7). In the airbag 20 of the embodiment, when the inflation is completed, the front seat protection part 28, the rear seat protection part 29, the central side secondary inflation part 36, and the rear side secondary inflation part 37 are respectively in a non-inflated state. Since the expansion is performed so as to reduce the width dimension in the front-rear direction, a tension substantially along the front-rear direction is also generated between the end-side partition 51 and the rear-end-side attachment portion 59R.

  Further, in the vehicle V on which the head protection airbag device M of the embodiment is mounted, the steering wheel 68 disposed in front of the driver seat DS is provided with a steering wheel that operates when an impact force is applied from the front side of the vehicle V. An air bag device 69 is mounted (see FIG. 1). The airbag device 69 includes an airbag 70 that is folded and accommodated in a boss portion 68a of a steering wheel 68, and an inflator (not shown) that supplies inflation gas to the airbag 70. The airbag 70 includes: Inflating gas into the interior to cover the entire upper surface side of the ring portion 68b of the steering wheel 68 when an impact force from the front side is applied, including during an oblique collision or an offset collision. (See FIG. 7). Specifically, the airbag 70 has an inflation completed shape by coupling the outer peripheral edges of the vehicle body side wall 70b disposed on the steering wheel 68b side and the occupant side wall 70a disposed on the occupant P side when the inflation is completed. Is substantially disk-shaped so as to cover the entire upper surface side of the ring portion 68b (see FIGS. 6 and 7).

  Next, mounting of the head protection airbag device M of the embodiment on the vehicle V will be described. The airbag 20 in the state in which the upper coupling portion 64 and the lower coupling portion 65 are formed in advance is in a state where the vehicle inner side wall portion 24a and the vehicle outer side wall portion 24b are flattened, and the lower edge 21b side is set to the upper edge 21a side. The connecting member 61 is folded so as to be close to each other. In the embodiment, the airbag 20 is folded in a state in which the protruding portion 34 in the front side sub-inflatable portion 31 is folded so that the folded portion is directed forward. Then, after the folding of the airbag 20 is completed, a predetermined portion of the folded airbag 20 is wrapped with a wrapping material (not shown) that can be broken to prevent it from collapsing.

  Thereafter, the inflator 14 to which the mounting bracket 16 has been attached is connected to the gas inlet 27 of the airbag 20 using the clamp 15, and the mounting bracket 11 is fixed to the mounting portions 59 and 62, respectively. The airbag assembly is formed.

  Next, the mounting brackets 11 and 16 are arranged at predetermined positions on the inner panel 2 on the body 1 side, and are fastened with bolts 12 and 17. A lead wire (not shown) extending from a predetermined control device for operating the inflator is attached to the inflator 14. Connect the front pillar garnish 4 and roof head lining 5 to the inner panel 2 on the body 1 side, and attach the pillar garnishes 6 and 7 to the inner panel 2 on the body 1 side. It can be mounted on the vehicle V.

  After mounting the head protection airbag device M of the embodiment on the vehicle V, the inflator receives an operation signal from the control device at the time of side collision, oblique collision, offset collision, or rollover of the vehicle V. 14 is activated, the inflating gas discharged from the inflator 14 flows into the inflating shielding part 21 of the airbag 20, and the inflating inflating shielding part 21 breaks a wrapping material (not shown), As shown in the two-dot chain line in FIG. 1 and FIG. 6, the windows W <b> 1, W <b> 2, and the center are pushed while opening the airbag cover 9 composed of the lower edges of the front pillar garnish 4 and the roof head lining 5. It will be greatly expanded so as to cover the inside of the pillar portion CP and the rear pillar portion RP. In addition, at the time of oblique collision or offset collision, the steering wheel airbag device 69 mounted on the steering wheel 68 in front of the driver seat DS is also operated to inflate the airbag 70 as shown in FIG. The Rukoto.

  In the head protection airbag device M according to the embodiment, when the airbag 20 is completely inflated, the front sub-inflatable portion 31 disposed on the front end 21c side of the inflation shielding portion 21 protrudes toward the vehicle interior I and inflates. The projecting portion 34 has a closed portion (upper circular closure) configured by combining the vehicle inner side wall portion 24a and the vehicle outer side wall portion 24b in the region of the front side auxiliary expansion portion 31. 48F, 48R and the lower circular closing portions 49F, 49R) are arranged so that the regions between the upper circular closing portions 48F, 48R and the lower circular closing portions 49F, 49R are arranged in the vehicle interior I. It is the structure which protrudes and arrange | positions at the vehicle inside I by combining. And the edge side part 33 and the center side part 32 will each be expanded and arrange | positioned so that it may adjoin on both the front and back sides of the protrusion part 34 (refer FIG. 7), and these edge side parts 33 and The center side portion 32 is configured to support the protruding portion 34 by the vehicle inner wall portion 24a. Therefore, in the head protection airbag device M of the embodiment, when the airbag 20 is completely inflated, the edge side portion 33 and the center side portion 32 that are arranged adjacent to each other in the front and rear directions to the vehicle inner side I of the protruding portion 34. The head H of the occupant P, which moves obliquely forward, which is the vehicle outer side O, protrudes as shown by a two-dot chain line in FIG. When received by the portion 34 and the central portion 32, the vehicle outer side O obliquely forward of the protruding portion 34 can be accurately supported by the end portion side portion 33, and the protruding portion 34 is not easily displaced back and forth. The portion 34 can smoothly protect the head H of the occupant P. In the head protection airbag device of the embodiment, the edge side portion 33 that supports the vehicle outer side O of the projecting portion 34 is also inflated by inflating the inflation gas into the inside. Can be taken into consideration, and the head H of the occupant P can be restrained accurately.

  Therefore, in the head protection airbag device M of the embodiment, the head H of the occupant P is accurately protected at the time of the oblique collision by the region (front-side sub-inflation portion 31) arranged on the edge side in the front-rear direction when the inflation is completed. be able to.

  In particular, in the head protection airbag apparatus M of the embodiment, the airbag 20 has the connecting member 61 disposed on the vehicle exterior side of the front side sub-inflation part 31, and the front side sub-inflation is completed when the airbag 20 is completely inflated. Since the portion 31 is supported on the vehicle outer side O by the connecting member 61 arranged to generate a tension along the front-rear direction, the protruding portion 34 protects the head H of the occupant P more accurately. be able to.

  Furthermore, in the head protection airbag device M of the embodiment, when the airbag 20 is completely inflated, the protruding portion 34 is disposed close to the rear side on the right edge side of the ring portion 68b of the steering wheel 68. . In other words, when the airbag 20 is completely inflated, the protruding portion 34 is located on the vehicle interior side so as to fill a gap with the airbag 70 for the steering wheel that has been inflated, obliquely in front of the occupant P. It protrudes to I and is arranged (see FIG. 7). Therefore, even when the head H of the occupant P (driver) who moves toward the front diagonally outside the vehicle tries to enter the gap between the airbags 20 and 70 during the oblique collision, the head H protrudes. The portion 34 can be accurately received, and further movement of the head H to the outside of the vehicle can be accurately suppressed.

  Further, in the airbag 20 in the head protection airbag device M of the embodiment, the four circular upper circular closing portions 48F and 48R and the lower circular closing portions 49F and 49R are provided in the region of the front auxiliary inflating portion 31. Although it is a configuration that is spaced apart in the front-rear and left-right directions, the outer shape of the closing part arranged in the region of the front side sub-expansion part and the outer shape of the coupling part that couples the closing parts are not limited to this. It is good also as external shapes like airbag 20A, 20B, 20C, 20D, 20E, 20F, 20G, 20H, 20J, 20K, 20L illustrated below.

  In the airbag 20A shown in FIG. 8, rod-like (linear) rod-like partitioning portions 73F and 73R arranged substantially along the vertical direction are respectively separated in the front-rear direction in the region of the front auxiliary inflating portion 31A. The airbag structure 23A is folded between the rod-shaped partition portions 73F and 73R with a crease CL2, and a coupling portion 74 is formed so that the rod-shaped partition portions 73F and 73R are coupled to each other. It is the structure to do. In the airbag 20A having such a configuration, when the inflation is completed, the projecting portion 34A, the end side portion 33A, and the central side portion 32A each inflate in a substantially rod shape substantially along the vertical direction when the inflation is completed. It is preferable. Further, when the partition portion is formed in a rod shape, like the airbag 20B shown in FIG. 9, the rod-shaped partition portions 76F and 76R that are spaced apart from each other are configured to extend from the lower edge 21b of the expansion shielding portion 21B. The coupling portion 77 that couples the rod-shaped partition portions 76F and 76R may also be arranged so as to be continued from the lower edge 21b of the expansion shielding portion 21B. In the airbag 20B having such a configuration, when the inflation is completed, the protruding portion 34B, the end side portion 33B, and the center side portion 32B are substantially rod-shaped substantially along the vertical direction with the lower end side separated. Will swell. Furthermore, the bar-shaped partition portion may be formed so as to extend downward from the upper edge 21a of the expansion shielding portion 21A as indicated by a two-dot chain line in FIG.

  Further, in the case where the closed portion is formed in a rod shape, the length dimension of the rod-shaped partition portion 79F disposed on the front side is larger than the length dimension of the rod-shaped partition portion 79R disposed on the rear side as in the airbag 20C illustrated in FIG. The rod-shaped partition part 79F may be configured to be set to be large so as to extend upward from the rod-shaped partition part 79R so that the separation distance from the portion on the upper edge side of the peripheral edge part 46C is different. In the airbag 20C, the coupling portion 80 is formed over substantially the entire area above and below the rod-shaped partition portion 79R in a state where the rod-shaped partition portions 79F and 79R are overlapped with each other. In the airbag 20C having such a configuration, the rod-shaped partition portion 79F is protruded upward from the rod-shaped partition portion 79R, so that the edge-side portion 33C is compared with the case where the lengths of the rod-shaped partition portions are the same. The start of inflow of the expansion gas into the gas can be delayed, and the edge side portion 33C can be expanded slowly. Conversely, the length dimension of the front bar-shaped partition part may be set shorter than the length dimension of the rear bar-shaped partition part.

  Further, when the partition portion is formed in a rod shape, as shown in the airbag 20D shown in FIG. 11, the upper and lower end sides of the rod-shaped partition portions 82F and 82R formed by separating the upper and lower end sides from the peripheral edge portion 46D are arranged in front or rear. It is good also as a structure which arrange | positions the protrusion part 82a which protrudes toward. In the airbag 20D, the rod-shaped partition portions 82F and 82R are configured such that the protruding portion 82a faces the protruding portion 34D. That is, the front rod-shaped partition part 82F is configured so that the protruding part 82a faces the rear side, and the rear bar-shaped partition part 82R is configured so that the projecting part 82a faces the front side. In the airbag 20D, the coupling portion 83 is formed over substantially the entire area above and below the rod-shaped partition portions 82F and 82R in a state where the rod-shaped partition portions 82F and 82R overlap each other. In the airbag 20D having such a configuration, the inflow amount of the inflation gas into the protruding portion 34D can be suppressed and the completion of the expansion of the protruding portion 34D is slightly delayed as compared with the case where the protruding portion is not provided. Can do.

  Furthermore, when it is set as the structure which provides a protrusion part in the up-and-down both ends side of a rod-shaped division part, like the airbag 20E shown in FIG. 12, the rod-shaped division part 85F and 85R couple | bonded mutually in the site | part of the coupling | bond part 86 protrudes. Both portions 85a may be configured to protrude rearward, and furthermore, rod-like partition portions 88F and 88R that are coupled to each other at the portion of the coupling portion 89, such as an airbag 20F illustrated in FIG. The projecting portion 88a may be configured to project to the side separated in the front-rear direction.

  Further, as in the airbag 20G shown in FIG. 14, a substantially U-shaped partition part 91 is formed in the region of the front side sub-inflation part 31G, and the partition part 91 is disposed substantially along the vertical direction on the front side. As the structure which couple | bonds the front side part 91a and the rear side part 91b which is spaced apart from the front side part 91a and is arrange | positioned along the up-down direction on the back side mutually, and forms the coupling | bond part 92 mutually. Also good. In the airbag 20G having such a configuration, the protruding portion 34G configured by the region between the front portion 91a and the rear portion 91b has the lower end side of the partition portion 91 with the front portion 91a and the rear portion 91b. It is blocked by the connecting portion 91c that connects the lower ends to each other, and the inflation gas is allowed to flow into the inside only from the upper end side. Conversely, as in the airbag 20H shown in FIG. 15, a substantially inverted U-shaped partition part 94 is formed in the region of the front auxiliary inflating part 31H, and the front part 94a and the rear part of the partition part 94 are formed. 94b may be overlapped with each other to form the coupling portion 95. In the airbag 20H having such a configuration, the protruding portion 34H is closed at the upper end side by the connecting portion 94c of the partition portion 94, and the inflation gas flows into the inside only from the lower end side.

  Furthermore, as in the airbag 20J shown in FIG. 16, two rod-like lateral partition portions 97U and 97D arranged substantially along the front-rear direction are juxtaposed in the vertical direction side in the region of the front side sub-inflation portion 31J. A configuration may be adopted in which the front end 97a side and the rear end 97b side of each of the horizontal partition portions 97U and 97D are overlapped with each other to form substantially circular coupling portions 98U and 98D. In the airbag 20J having such a configuration, the projecting portion 34J is divided into three parts at the top and bottom by the lateral partition portions 97U and 97D, and the inflation gas is allowed to flow into the interior from both front and rear ends. It becomes.

  Furthermore, as in the airbag 20K shown in FIGS. 17A and 17B, the front end side portion (the portion where the front side secondary inflating portion 31K is disposed) of the airbag constituting body 23K in a flatly deployed state is defined as the front and rear intermediate portions. It may be bent and formed so as to incline forward and downward at a portion constituting the protruding portion 34K. In the airbag constituting body 23K, the rod-shaped partition portions 100F and 100R arranged in the region of the front side secondary inflating portion 31K are also formed to be inclined corresponding to the inclination of the portion on the front end side. The airbag 20K folds the airbag structure 23K with a crease CL3 that is inclined so that the lower end side is directed rearward with respect to the vertical direction between the rod-shaped partition portions 100F and 100R. It is formed by forming the coupling portion 101 so that the rod-shaped partition portions 100F and 100R are coupled to each other. In the airbag 20K having such a configuration, when the inflation is completed, the protruding portion 34K and the edge side portion 33K of the front sub-inflation portion 31K are inclined so that the lower end side is directed rearward with respect to the vertical direction. Will be placed. That is, in the airbag 20K having such a configuration, the projecting portion 34K is disposed substantially along the ring surface of the ring portion 68b of the steering wheel 68 that is disposed to be inclined downward and rearward with respect to the vertical direction. It becomes an aspect. Therefore, even if the protruding portion 34K cannot catch the head H of the occupant P that protrudes obliquely forward on the outside of the vehicle, the protruding portion 34K causes the head H of the occupant P to be placed on the upper surface of the ring portion 68b. The airbag 70 that is inflated so as to cover the entire surface can be guided to the side of the occupant side wall 70a, and the head H of the occupant P can be restrained by the airbag 70 for the steering wheel.

  Conversely, as in the airbag 20L shown in FIGS. 18A and 18B, the front end side portion (the portion where the front side sub-inflatable portion 31L is arranged) of the airbag constituting body 23L in a flatly deployed state is moved back and forth. It may be configured to be bent so as to incline forwardly at a portion constituting the projecting portion 34L which is the middle of the above. Also in this airbag structure 23L, the rod-shaped partition parts 103F and 103R arranged in the region of the front side sub-inflation part 31L are also formed to be inclined corresponding to the inclination of the part on the front end side. The airbag 20L folds the airbag structure 23L with a crease CL4 that is inclined so that the lower end side is directed frontward with respect to the vertical direction between the rod-shaped partition portions 103F and 103R. The rod-shaped partition portions 103F and 103R are formed by forming the coupling portion 104 so as to couple each other. In the airbag 20L having such a configuration, when the inflation is completed, the protruding portion 34L and the edge side portion 33L of the front side sub-inflation portion 31L are arranged so as to be inclined with the lower end side facing the front side with respect to the vertical direction. Will be.

  Note that, in the airbag 20 of the embodiment, the central side portion 32 disposed adjacent to the rear side of the protruding portion 34 is configured by a part of the front side sub-inflation part 31, but the central side portion is the main side portion. You may comprise from the front seat protection part itself which is an expansion | swelling part.

  Furthermore, in the embodiment, an airbag having a configuration in which the protruding portion is arranged on the front end side of the airbag is described as an example, but the arrangement position of the protruding portion is not limited to the embodiment, and the protruding portion is not limited to the embodiment. It is good also as a structure arrange | positioned at the rear-end side of an airbag.

  14 ... Inflator, 20, 20A, 20B, 20C, 20D, 20E, 20F, 20G, 20H, 20J, 20K, 20L ... Airbag, 21, 21A, 21B, 21C, 21D, 21E, 21F, 21G, 21H, 21J , 21K, 21L ... Inflatable shield part, 21c ... Front end, 23, 23A, 23B, 23C, 23D, 23E, 23F, 23G, 23H, 23J, 23K, 23L ... Air bag component, 24 ... Gas inflow part, 24a ... Car inner side wall part, 24b ... Car outer side wall part, 31, 31A, 31B, 31C, 31D, 31E, 31F, 31G, 31H, 31J, 31K, 31L ... Front side sub-inflating part, 32, 32A, 32B, 32C, 32D, 32E, 32F, 32G, 32H, 32J, 32K, 32L ... center side part, 33, 33A, 33B, 33C, 33 , 33E, 33F, 33G, 33H, 33J, 33K, 33L ... end side part, 34, 34A, 34B, 34C, 34D, 34E, 34F, 34G, 34H, 34J, 34K, 34L ... projecting part, 45 ... non-inflow Part (closed part), 48F, 48R ... upper circular closed part, 49F, 49R ... lower circular closed part, 64 ... upper coupling part, 65 ... lower coupling part, 73F, 73R ... rod-shaped partition part, 74 ... coupling part 76F, 76R ... rod-shaped partitioning part, 77 ... coupling part, 79F, 79R ... rod-shaped partitioning part, 80 ... coupling part, 82F, 82R ... rod-shaped partitioning part, 83 ... coupling part, 85F, 85R ... rod-shaped partitioning part, 86 ... Joining part, 88F, 88R ... rod-like partition part, 89 ... joining part, 91 ... partitioning part, 91a ... front part, 91b ... rear part, 92 ... joining part, 94 ... partition part, 94a ... front part, 94b ... rear Side part 95: coupling portion, 97U, 97D ... horizontal partitioning portion, 97a ... front end, 97b ... rear end, 98U, 98D ... coupling portion, 100F, 100R ... rod-shaped partitioning portion, 101 ... coupling portion, 103F, 103R ... rod-shaped partitioning portion, 104 ... coupling part, P ... passenger, H ... head, W1, W2 ... window, V ... vehicle, M ... head protection airbag device.

Claims (4)

It has an airbag that is folded and stored on the upper edge of the window inside the car,
The airbag has an upper edge side attached and fixed to the body side of the vehicle, and has an inboard side wall portion positioned on the inner side of the vehicle and an outer side wall portion positioned on the outer side of the vehicle when inflating is completed. A head protection airbag device configured to include an inflating shielding part that expands and inflates so as to cover the vehicle interior of the window by flowing in gas,
In the expansion shielding part, the region on the edge side in the front-rear direction is
While disposing a coupling portion configured by combining the closed portions configured by combining the vehicle inner wall portion and the vehicle outer wall portion,
As the configuration in which the closed parts before joining of the joint parts are arranged apart from each other on the front-rear direction side, and the region between the closed parts is arranged on the vehicle inner side and joined together.
When expansion is complete,
Adjacent to the coupling part, a central part that expands at a position on the central side in the front-rear direction of the expansion shielding part from the coupling part,
Adjacent to the coupling part, an edge side part that expands on the edge side in the front-rear direction than the coupling part,
In the region between the closed portions, a projecting portion that is supported by the vehicle inner wall portion in the center side portion and the edge side portion, and that protrudes and expands toward the vehicle inner side,
A head protection airbag device characterized by comprising:   The head protection airbag device according to claim 1, wherein each of the closing portions is configured as a linear shape arranged substantially along the vertical direction.   The head protection airbag device according to claim 1, wherein each of the closing portions is formed in a substantially circular shape.   The head protection airbag device according to claim 2, wherein the linear closing portion is configured to extend from an upper edge or a lower edge of the airbag when inflation is completed.

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