JP2019131161A - Far side airbag device - Google Patents

Abstract

To effectively suppress an occupant seated on a seat provided away from a side wall part of a vehicle from falling down toward the side wall part when impact is applied to the side wall part, from a lateral side.SOLUTION: A far side airbag device comprises an airbag 40 in a folded state fixed to a seat of a vehicle, which expands and inflates the airbag 40 forward from a rear side, between a plurality of seats lined in a width direction of the vehicle, by supplying gas for inflation to the air bag. At an occupant side of the airbag 40 which is being expanded and inflated are provided outer tethers 51 and 52 whose front end parts are joined to a front part of the airbag 40 and whose rear end parts are joined to a rear part of the airbag 40. Lengths in a longitudinal direction of the outer tethers 51 and 52 are set to lengths enough to restrict expansion and inflation from the rear side toward the front side of the airbag 40. In the airbag 40 is provided an inner tether 47, which accelerates folding-back of the airbag 40 when being expanded and inflated, to extend in a direction in which the tether crosses the outer tethers 51 and 52.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a far side airbag device.

  Some vehicles, such as vehicles, have a plurality of seats arranged in the width direction, and when an impact is applied from the side to the side wall of such a vehicle, a passenger sitting on a seat far from the side wall Try to fall into the side wall.

  For the purpose of protecting such passengers, a far side airbag device is mounted on the vehicle. The apparatus includes an airbag fixed to the vehicle in a folded state, and when an impact is applied from the side to the side wall of the vehicle, the airbag is arranged in the width direction of the vehicle through supply of inflation gas. Expand and inflate between the plurality of seats from the rear to the front.

  As a result, the occupant seated on the seat far from the side wall portion to which the impact has been applied is protected by the airbag that has been deployed and inflated as described above when attempting to fall into the side wall portion side. Specifically, the occupant seated on the seat far from the side wall where the aggression has been applied will not interfere with other occupants or vehicle interiors seated on the seat near the side wall. Is done.

  Further, in Patent Document 1, a strap is provided at a portion on the occupant side seated on a seat far from the side wall portion where the impact is applied in the airbag at the time of deployment and inflation, and at the time of deployment and inflation of the airbag. It is described that the urging force of the strap toward the occupant side is applied to the airbag.

  In this case, the airbag that is deployed and inflated is brought closer to the occupant side seated on the seat far from the side wall portion where the impact is applied by the action of the urging force by the strap. It becomes easy to suppress that a passenger | crew falls to the said side wall part side.

JP-A-2006-215868

  As shown in Patent Document 1, even if the airbag that is deployed and inflated is brought closer to the occupant side seated on the seat far from the side wall portion where the impact is applied, the occupant falls down to the side wall portion side. However, there is room for further improvement in terms of effectively suppressing the above-described collapse of the occupant.

  An object of the present invention is to provide a fur that can effectively prevent a passenger sitting on a seat far from the side wall from falling toward the side wall when an impact is applied from the side to the side wall of the vehicle. The object is to provide a side airbag device.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
A far side airbag device that solves the above problem includes an airbag that is fixed to a vehicle in a folded state. When an impact is applied from the side to the side wall of the vehicle, the apparatus deploys and inflates the airbag from the rear to the front between a plurality of seats arranged in the width direction of the vehicle through the supply of inflation gas. This protects the occupant seated on the seat far from the side wall portion where the impact is applied. A tether that extends in the front-rear direction and has a front end portion coupled to the front portion of the airbag and restricts the deployment and inflation of the airbag forward is provided on the occupant side of the airbag during deployment and inflation. . Between the rear portion of the airbag and the front portion to which the front end portion of the tether is coupled, a folding promoting portion that promotes folding of the airbag during deployment and inflation is formed.

  According to the above configuration, when an impact is applied from the side to the side wall portion of the vehicle, an occupant seated on a seat far from the side wall portion tends to fall into the side wall portion side, while the vehicle The airbag is deployed and inflated from the rear to the front through the supply of the inflation gas between the plurality of sheets arranged in the width direction. In the airbag, deployment and inflation toward the front are restricted by the occupant-side dither, and the airbag is easily folded at the folding promotion portion. Therefore, when the airbag is deployed and inflated forward, the airbag is efficiently bent to the occupant side and tries to push the occupant back. Therefore, it is effective that the occupant falls down to the side wall portion side. Can be suppressed.

  A far side airbag device that solves the above problem includes an airbag that is fixed to a vehicle in a folded state. When an impact is applied from the side to the side wall of the vehicle, the apparatus deploys and inflates the airbag from the rear to the front between a plurality of seats arranged in the width direction of the vehicle through the supply of inflation gas. This protects the occupant seated on the seat far from the side wall portion where the impact is applied. A tether that extends in the front-rear direction and has a front end portion coupled to the front portion of the airbag and a rear end portion coupled to the rear portion of the airbag is provided on the occupant side of the airbag during deployment and inflation. . The length of the tether in the front-rear direction is set to a length that restricts the rearward and forward deployment and inflation of the airbag. Between the front part to which the front end part of the tether in the airbag is joined and the rear part to which the rear end part of the tether is joined, a folding promoting part for promoting the folding of the airbag at the time of deployment and inflation is a tether. Is formed so as to extend in a direction crossing.

  According to the above configuration, when an impact is applied from the side to the side wall portion of the vehicle, an occupant seated on a seat far from the side wall portion tends to fall into the side wall portion side, while the vehicle The airbag is deployed and inflated from the rear to the front through the supply of the inflation gas between the plurality of sheets arranged in the width direction. The airbag is restricted from being expanded and inflated by the occupant-side dither and is easily bent at the folding promoting portion. When the airbag is expanded and inflated, the airbag is efficiently bent toward the occupant and pushed back. Therefore, the occupant can be effectively prevented from falling to the side wall portion side.

In addition, it is preferable that the said bending promotion part is formed so that the both ends may respectively reach the periphery of the said airbag.
According to this configuration, the folding promoting portion extends in a direction crossing the tether and both ends of the folding promoting portion reach the peripheral edge of the airbag, respectively, so that the deployment and inflation of the airbag are restricted by the tether. The airbag is more likely to bend at the folding promoting portion.

  In the far side airbag device, it is conceivable that the folding promoting section partitions the airbag into a rear expansion chamber and a front expansion chamber. As for the length of the tether in the front-rear direction, a position where the portion corresponding to the rear expansion chamber and the portion corresponding to the front expansion chamber in the airbag when deployed and inflated sandwich the bending promoting portion. It is conceivable to set the length to be in contact with each other.

  According to the above configuration, when the deployment and inflation of the airbag are restricted by the tether, the portion of the airbag corresponding to the rear inflation chamber and the portion corresponding to the front inflation chamber sandwich the folding promoting portion. The airbags bend more greatly at the folding promoting portion so as to be in contact with each other. Therefore, when the airbag is deployed and inflated, it bends greatly and tries to push the occupant back, so that the occupant can be more effectively prevented from falling.

  In the far-side airbag device, the airbag is fixed to a seat back fixing portion of a vehicle seat, and a rear end of the tether is fixed to the fixing portion together with a rear end portion of the airbag. Therefore, it is conceivable that the bending promoting portion is inclined so as to fall backward with respect to the vertical direction when the airbag is deployed and inflated.

  According to this configuration, the airbag when deployment and inflation are regulated by the tether are mutually connected at a position where the portion corresponding to the rear expansion chamber and the portion corresponding to the front expansion chamber sandwich the bending promoting portion. Bend to touch. When the airbag is deployed and inflated, the folding promoting portion is inclined so as to fall rearward with respect to the vertical direction. In other words, the airbag is in an inclined state corresponding to the inclination of the seat back with respect to the vertical direction. When the bag is bent at the bending promoting portion, the front expansion chamber of the airbag presses the occupant from the side and the front. Thereby, it is possible to more effectively suppress the occupant from falling down.

  In the far-side airbag device, the length of the tether in the front-rear direction is the seat cushion of the seat adjacent to the seat where the front end of the folding promoting portion of the airbag when deployed and inflated is provided with the fixing portion. It is conceivable that the length reaches the corresponding height position.

  According to this configuration, when the airbag is bent at the bending promoting portion, the front end of the bending promoting portion reaches a height position corresponding to the seat cushion of the seat adjacent to the seat provided with the fixing portion. The airbag repels the seat cushion and tries to push back more strongly the occupant of the seat provided with the fixing portion. Thereby, it is possible to more effectively suppress the occupant from falling down.

  In the far-side airbag device, the length of the tether in the front-rear direction is such that when the airbag is deployed and inflated, the head of the occupant who is about to fall sideways is supported from below by the front upper portion of the airbag. It is conceivable that the length is set to a certain length.

  According to this configuration, when the occupant's head is about to fall to the side due to an impact from the side with respect to the side wall of the vehicle, the head is supported from below by the front upper portion of the deployed and inflated airbag. This prevents the occupant's head from falling sideways.

  Further, in the airbag, a portion on the front side of the folding promotion portion is a front expansion chamber, while a portion on the rear side of the bending promotion portion is a rear expansion chamber, and the front side It is conceivable that the expansion chamber is made smaller than the rear expansion chamber.

  According to this configuration, since the front expansion chamber of the airbag is smaller than the rear expansion chamber, a hoop that is generated in the front expansion chamber of the airbag when deployment and expansion of the airbag toward the front is restricted by the tether. The stress can be kept small, and accordingly, the portion of the airbag forming the front expansion chamber is easily bent toward the occupant side.

  In the far-side airbag device, the portion where the front end portion of the tether in the front portion of the airbag is coupled is a dividing portion for partitioning the auxiliary expansion chamber above the front end portion of the tether in the airbag. Can be considered.

  According to this configuration, when the airbag is deployed and inflated forward, the airbag is not only bent to the occupant side and trying to push the occupant back, but the auxiliary inflation chamber is provided with a tether for the occupant. It comes to correspond to the side of the upper part (for example, a crew member's head) rather than the front end part. For this reason, the said part of a passenger | crew can be shielded with respect to a side by an auxiliary expansion chamber.

  The said far side airbag apparatus WHEREIN: The said division | segmentation part shall have the communicating path which connects the inside and outside of the said auxiliary | assistant expansion chamber in an airbag in the position which removed the front-end part and the rear-end part. Can be considered.

  According to this configuration, when the inflation gas flows into the auxiliary inflation chamber via the communication passage of the dividing portion when the airbag is deployed and inflated, the inflation gas flows forward and backward in the auxiliary inflation chamber, The auxiliary expansion chamber expands and expands evenly toward the front side and the rear side. On the other hand, when the auxiliary expansion chamber expands and expands in this way, the portion corresponding to the communication passage in the auxiliary expansion chamber is less likely to be folded toward the occupant side due to the inflow of the expansion gas, but the front end than the communication passage in the divided portion In the portions corresponding to the side and the rear end side, the bending to the occupant side is not hindered by the flow of the inflation gas. Therefore, the auxiliary expansion chamber as a whole is easily folded to the occupant side with the divided portion as a fulcrum during its expansion and expansion, and accordingly, a portion above the front end portion of the tether in the occupant is shielded from the side by the auxiliary expansion chamber. Become so.

In the far side airbag device, it is conceivable that the front end portion of the tether is coupled to a portion of the front portion of the airbag corresponding to the communication path of the divided portion.
According to this configuration, when the auxiliary expansion chamber is deployed and inflated, the portion corresponding to the communication path in the auxiliary expansion chamber is not easily folded toward the occupant side with the inflow of the inflation gas. When being regulated by the tether, the portion corresponding to the communication path in the divided portion is pulled by the tether, whereby the auxiliary expansion chamber can be easily folded toward the occupant side.

  ADVANTAGE OF THE INVENTION According to this invention, when the impact is added from the side with respect to the side wall part of a vehicle, it can suppress effectively that the passenger | crew who is seated on the sheet | seat far from the side wall part falls into the side wall part side.

The top view which shows the vehicle with which a far side airbag apparatus is applied. Sectional drawing which shows the side wall part and seat in the vehicle. The expanded plane sectional view which shows the part in which the airbag in the sheet | seat was accommodated. The schematic diagram which shows the state which looked at the seat and the passenger | crew from the side. The side view which shows the state which unfolded the cloth piece for forming an airbag. The side view which shows an airbag. Sectional drawing which shows the inner side tether vicinity in an airbag. Sectional drawing which shows the positional relationship of the airbag of the expansion | deployment in the vehicle, and the inflated state, and the vehicle seat. The side view which shows an airbag. The perspective view which shows the attachment aspect of the airbag with respect to the flame | frame of a sheet | seat. Sectional drawing which shows the positional relationship of the passenger | crew seated on the airbag and the airbag of the state which expand | deployed and expanded in the vehicle. The side view which shows an airbag. Sectional drawing which shows the positional relationship of the passenger | crew seated on the airbag and the airbag of the state which expand | deployed and expanded in the vehicle. The side view which shows the other example of an airbag.

[First Embodiment]
Hereinafter, 1st Embodiment of a far side airbag apparatus is described with reference to FIGS.

  As shown in FIGS. 1 and 2, a vehicle (vehicle) 10 is provided with side walls 11 and 12 including doors and pillars on both sides in the width direction (left and right directions in FIGS. 1 and 2). A plurality of seats 13 and 14 arranged in the width direction of the vehicle 10 are provided between the side wall portions 11 and 12. These seats 13 and 14 (FIG. 2) stand up from the seat cushion 16 on which the lower body of the occupants P1 and P2 can be placed, and the occupant P1 and the seat cushion 16 from the rear side (the back side in FIG. 2), respectively. And a seat back 17 that supports the upper body of P2.

  When an impact is applied to the side wall portion 11 or the side wall portion 12 of the vehicle 10 from the side, the passengers P1 and P2 seated on the seats 13 and 14 on the side far from the side wall portions 11 and 12 to which the impact is applied, It tries to fall into the side wall parts 11 and 12 to which the impact is applied. When an impact is applied to the side walls 11 and 12 as described above, the vehicle 10 is provided with passengers P1 and P2 seated on the seats 13 and 14 on the side far from the side walls 11 and 12 to which the impact is applied. A far side airbag device is provided for protection.

  The far-side airbag device includes an airbag 40 that is fixed to the vehicle 10 in a folded state, more specifically, to the seat back 17 (FIG. 2) of the seats 13 and 14 in the vehicle 10. The airbag 40 fixed to the seat back 17 of the seat 13 is located in the portion closest to the seat 14, and the airbag 40 fixed to the seat back 17 of the seat 14 is located in the portion closest to the seat 13. Yes. In addition, since the structure around the airbag 40 in the seat 13 and the seat 14 is the same structure except that it is symmetric (laterally symmetric) in the width direction of the vehicle 10, the airbag 40 in the seat 14 will be described below. Only the surrounding structure will be described in detail.

  FIG. 3 is an enlarged plan view showing the periphery of the airbag 40 of the seat back 17 in the seat 14. As shown in the figure, in the seat back 17 of the seat 14, the airbag 40 in a folded state is housed in a portion close to the seat 13 (the left portion in FIG. 3). An inflator 31 for supplying inflation gas to the airbag 40 is also accommodated. The inflator 31 is covered with a retainer 32. The retainer 32 is attached to the frame 18 of the seatback 17 together with the folded airbag 40 by means of bolts 33 and nuts 34 (only the upper one is shown in FIG. 3) provided in two upper and lower stages. It is fixed.

  The portion of the frame 18 where the airbag 40 is fixed by the bolt 33 and the nut 34 is a fixing portion for fixing the airbag 40 to the seats 13 and 14 of the vehicle 10 (only the seat 14 is shown in FIG. 3). Function as.

  As shown in FIG. 4, the far side airbag device includes a control device 71 that controls the supply of the inflation gas to the airbag 40 by the inflator 31. An impact sensor 72 composed of an acceleration sensor or the like provided on the side walls 11 and 12 (FIGS. 1 and 2) is connected to the control device 71. The impact sensor 72 detects an impact applied from the side to the side wall portions 11 and 12. Then, the control device 71 operates the inflator 31 based on the detection signal from the impact sensor 72 to supply the inflation gas to the airbag 40.

  When inflation gas is supplied from the inflator 31 to the airbag 40, the airbag 40 is deployed and inflated, and the portion near the inflator 31 is seated back 17 as shown by the two-dot chain line in FIGS. It jumps forward from the seat back 17 while remaining inside. Thus, the airbag 40 jumping out from the seat back 17 is deployed and inflated between the seat 13 and the seat 14 (FIGS. 1 and 2) from the rear to the front, that is, from the upper side to the lower side in FIG. To do.

  When an impact is applied to the side wall portions 11 and 12 from the side, the occupants P1 and P2 seated on the seats 13 and 14 on the side far from the side wall portions 11 and 12 to which the impact has been applied are , 12 is about to fall down as described above. However, the passengers P1, P2 at that time are protected by the airbag 40 that is deployed and inflated between the seat 13 and the seat 14 from the rear to the front. Specifically, the passengers P1 and P2 seated on the seats 13 and 14 on the side far from the side walls 11 and 12 are seated on the seats 13 and 14 on the side near the side walls 11 and 12 by the airbag 40. It is made not to interfere with other occupants P1, P2 and interior parts of the vehicle 10.

Next, the detailed structure of the airbag 40 will be described.
As shown in FIG. 5, the airbag 40 is folded in two in the direction of the arrow along the fold line L1 set at the center portion of one piece of cloth 41, and is stacked in the thickness direction. The peripheral portions of the overlapped portions are joined to each other at a position indicated by a one-dot chain line L2 to form a bag shape. FIG. 6 shows a state in which the airbag 40 formed in a bag shape is viewed from one side in the thickness direction. The airbag 40 shown in FIGS. 5 and 6 is provided on the seat 14, and the airbag 40 provided on the seat 13 is centered on the folding line L1 with respect to the airbag 40 shown in FIGS. Therefore, in the following, the airbag 40 provided on the seat 14 will be described in detail.

  As shown in FIG. 6, the portion of the peripheral edge of the bag-like airbag 40 where the cloth pieces 41 are not joined together (the portion other than the one-dot chain line L <b> 2), that is, the portion located at the lowermost end of FIG. 6. An opening 40a that communicates the inside and outside of the airbag 40 is formed in a portion around the fold line L1. Further, one of the portions of the cloth piece 41 folded in two at the fold line L1 and overlapped in the thickness direction, which is located above the opening 40a in FIG. A mounting hole 42 is formed. These attachment holes 42 are for attaching the rear end portion of the airbag 40 to the frame 18 (FIG. 3) of the seat 14.

  As shown in FIG.5 and FIG.6, in the center part containing the fold line L1 in the back surface (surface on the opposite side to the surface shown by FIG. 5) of the cloth piece 41, the cloth piece which has the same periphery shape as the center part. 43 is provided. As shown in FIG. 6, this cloth piece 43 is folded in two along the folding line L1 together with the cloth piece 41 in the thickness direction, and is joined to each other at the position of the alternate long and short dash line L2. It is connected to. An inner bag 44 having a bag shape is formed inside the airbag 40 by the cloth piece 41 and the cloth piece 43.

  The both ends of the cloth piece 43 in the direction away from the folding line L1 are coupled to the cloth piece 41 at the position indicated by the alternate long and short dash line L3, and the other portions are not coupled to the cloth piece 41. . A portion that is not coupled to the cloth piece 41 is a communication portion 45 that communicates the inside and outside of the inner bag 44 in the airbag 40. Further, a communication hole 46 is formed between the both end portions of the cloth piece 43 and the fold line L1 so as to communicate the inside and outside of the inner bag 44 in the airbag 40.

  A retainer 32 (inflator 31) can be inserted into the inner bag 44 between the cloth piece 41 and the cloth piece 43 through the opening 40a. Then, with the bolt 33 for fixing the retainer 32 to the frame 18 (FIG. 3) passed through the attachment hole 42 (FIG. 6) of the cloth piece 41, the bolt 33 and the nut 34 (FIG. 3) By fixing the retainer 32 with respect to 18, the airbag 40 is also fixed with respect to the frame 18. The airbag 40 is fixed to the frame 18 so that a portion of the airbag 40 away from the retainer 32 is positioned on the front side of the vehicle 10.

  As shown in FIGS. 5 and 6, the back surface of the cloth piece 41 (the surface opposite to the surface shown in FIG. 5) and the cloth piece 43 at a position farther from the fold line L <b> 1 than the cloth piece 43. In the vicinity, a band-shaped inner tether 47 is provided. The inner tether 47 is located corresponding to both ends of the cloth piece 43 in the direction away from the fold line L1, and reaches the periphery of the cloth piece 41 across the cloth piece 41 in a state of being lined up with the both ends. ing. And the inner side tether 47 is couple | bonded with respect to the cloth piece 41 in the position shown with the dashed-dotted line L4 over the whole longitudinal direction. The inner tethers 47 extend in parallel with the alternate long and short dash line L4 and are coupled to each other at a position indicated by an alternate long and short dash line L5.

  In this way, the inner tethers 47 are joined to each other at the position indicated by the alternate long and short dash line L <b> 5, so that the inner side of the airbag 40 includes the inner bag 44 by the inner tether 47 and the rear expansion chamber 48. It is partitioned into a front expansion chamber 49 located away from the fold line L1. In addition, a portion of the inner tethers 47 joined to each other (a portion corresponding to the alternate long and short dash line L4) does not reach the periphery of the cloth piece 41. The communication part 50 which connects the rear side expansion chamber 48 and the front side expansion chamber 49 is formed. FIG. 7 shows a cross section of the airbag 40 around the communication portion 50 (inner tether 47).

  Therefore, when the inflation gas is ejected from the inflator 31 (FIG. 6), the inflation gas is supplied into the inner bag 44 of the airbag 40 and then inside the airbag 40 through the communication portion 45 and the communication hole 46. And it flows out of the inner bag 44 in the rear side expansion chamber 48. Further, the inflation gas flows out from the rear side expansion chamber 48 to the front side expansion chamber 49 in the airbag 40 through the communication portion 50 of the inner tether 47. As described above, the airbag 40 in the folded state is expanded and inflated through the supply of the inflation gas from the inflator 31.

  As shown in FIGS. 5 and 6, outer tethers 51 and 52 are provided on the surface of the cloth piece 41 (the surface shown in FIG. 5) so as to extend substantially in the front-rear direction (the left-right direction in FIGS. 5 and 6). ing. The outer tethers 51 and 52 serve as tethers whose front end portions are coupled to the front portion of the airbag 40 and whose rear end portions are coupled to the rear portion of the airbag 40. These outer tethers 51 and 52 are on the side of the occupants P1 and P2 seated on the seats 13 and 14 on the side far from the side wall portions 11 and 12 where the impact is applied in the airbag 40 when deployed and inflated (see FIGS. 5 and 5). In the example of 6, the cloth piece 41 is provided so as to be positioned on the occupant P2 side of the seat 14.

  As for the outer tether 51, the front end portion thereof is coupled to the front side peripheral edge of the cloth piece 41 in the airbag 40 at the position indicated by the alternate long and short dash line L2, while the rear end portion is attached to the attachment hole 42 in the cloth piece 41 (FIG. 5). 6 and the upper mounting hole 42) in FIG. Specifically, a connecting hole 53 through which a bolt 33 for fixing the retainer 32 to the frame 18 (FIG. 3) is passed is formed at the rear end of the outer tether 51. And by fixing the retainer 32 to the frame 18 with the bolt 33 and the nut 34 (FIG. 3) while the bolt 33 is passed through the connection hole 53 and the attachment hole 42 of the cloth piece 41, The rear end portion of the outer tether 51 is coupled to the rear portion of the airbag 40.

  The front end of the outer tether 52 is also coupled to the front peripheral edge of the cloth piece 41 in the airbag 40 at the position indicated by the alternate long and short dash line L2, while the attachment hole 42 in the cloth piece 41 is formed at the rear end. Combined with the part. Specifically, a pair of connection holes 54 through which bolts 33 for fixing the retainer 32 to the frame 18 (FIG. 3) are passed are formed at the rear end of the outer tether 52. Then, the retainer 32 is fixed to the frame 18 with the bolt 33 and the nut 34 (FIG. 3) while the bolt 33 is passed through the connection hole 54 and the attachment hole 42 of the cloth piece 41. A rear end portion of the tether 52 is coupled to a rear portion of the airbag 40.

  The length of the outer tethers 51 and 52 is set to a length that regulates the rearward and forward deployment and inflation of the airbag 40 when supplied with the inflation gas. When the rear end portions of the outer tethers 51 and 52 are coupled to the rear end portion of the airbag 40 as described above, the inner tether 47 in the airbag 40 is connected to the front end portions and the rear ends of the outer tethers 51 and 52. Cross between the ends. In other words, in the airbag 40, it is a front side periphery which is a part to which the front end parts of the outer tethers 51 and 52 are joined, and a part (rear part) to which the rear end parts of the outer tethers 51 and 52 in the airbag 40 are joined. The inner tether 47 crosses the portion where the attachment hole 42 is formed.

  The airbag 40 is folded and stored in the seat back 17 in a state where the rear end portions of the outer tethers 51 and 52 are fixed to the frame 18 together with the rear end portion of the airbag 40. When the airbag 40 is deployed and inflated in response to the supply of the inflation gas, the deployment and inflation are regulated by the outer tethers 51 and 52. An attempt is made to bend toward the occupant P2 seated on the seat 14 provided with 40.

  Such bending of the airbag 40 is likely to occur in a portion of the airbag 40 where inhibition of the bending due to the inflation gas does not occur, that is, a portion corresponding to the inner tether 47 in the airbag 40. As can be seen from this, the inner tether 47 in the airbag 40 functions as a folding promoting portion that promotes the folding of the airbag 40 during deployment and inflation.

  Incidentally, the inner tether 47 is inclined so as to fall rearward with respect to the vertical direction when the airbag 40 is deployed and inflated. This is because the joining position of the inner tether 47 to the cloth piece 41 (the one-dot chain line L4 in FIGS. 5 and 6) is determined so that the inner tether 47 is inclined in this manner, and the joining position of the inner tethers 47 is also determined. This is because (the one-dot chain line L5 in FIGS. 5 and 6) is defined.

  Further, in the airbag 40 when deployed and inflated, a portion corresponding to the front expansion chamber 49 is a rear expansion chamber because the rear expansion chamber 48 and the front expansion chamber 49 are partitioned by the inner tether 47. The portion corresponding to 48 is bent. The airbag 40 at this time is shown by a two-dot chain line in FIG. As can be seen from the figure, the lengths of the outer tethers 51 and 52 are also set to lengths that realize the following matters (A) and (B).

  (A) The portion corresponding to the rear inflation chamber 48 and the portion corresponding to the front inflation chamber 49 in the airbag 40 when deployed and inflated are at a position sandwiching the inner tether 47 that is the bent portion of the airbag 40. Touch each other.

  (B) The front end TPf of the inner tether 47 of the airbag 40 when deployed and inflated is a sheet (sheet 13 in this example) adjacent to the sheet (sheet 14 in this example) to which the airbag 40 is fixed. The height position corresponding to the seat cushion 16 is reached.

Next, the operation of the far side airbag device will be described.
Of the side wall portions 11 and 12 of the vehicle 10 shown in FIGS. 1 and 2, for example, when an impact is applied from the side to the side wall portion 11, an occupant P2 seated on the seat 14 on the side far from the side wall portion 11. However, it tries to fall into the side wall part 11 side. At this time, the airbag 40 fixed in a folded state with respect to the seat back 17 of the seat 14 is directed from the rear to the front between the plurality of seats 13 and 14 arranged in the width direction of the vehicle 10 through the supply of the inflation gas. Expand and expand. The airbag 40 is restricted from being expanded and inflated by the outer tethers 51 and 52 (FIGS. 5 and 6) on the occupant P2 side, and is easily bent at a portion corresponding to the inner tether 47. For this reason, when the airbag 40 is deployed and inflated, as shown by a two-dot chain line in FIG. 8, the airbag 40 is efficiently bent to the occupant P2 side and tries to push the occupant P2 back. It will be effectively suppressed to fall to the side.

  When an impact is applied to the side wall 12 of the vehicle 10 from the side, the occupant P1 seated on the seat 13 far from the side wall 11 tries to fall to the side wall 12 side. The collapse is effectively suppressed by the airbag 40 of the seat 13.

According to the embodiment described in detail above, the following effects can be obtained.
(1) When an impact is applied to the side walls 11 and 12 of the vehicle 10 from the side, the occupants P1 and P2 seated on the seats 13 and 14 far from the side walls 11 and 12 are It can suppress effectively falling to the side and 12.

  (2) As shown in FIG. 7, the inner tether 47 in the airbag 40 is formed such that both ends in the longitudinal direction (upper and lower ends in FIG. 7) reach the periphery of the airbag 40. As a result, the location where the bending of the inflation gas is not hindered by the inflating gas in the airbag 40 is different from the predetermined periphery (upper side in FIG. 7) of the airbag 40 along the inner tether 47 (lower side in FIG. 7). Side rim). For this reason, the deployment and inflation of the airbag 40 are restricted by the outer tethers 51 and 52, whereby the airbag 40 is more easily bent at the portion corresponding to the inner tether 47.

  (3) The length of the inner tether 47 is set to a length that realizes the above (A). For this reason, when deployment and inflation of the airbag 40 are restricted by the outer tethers 51 and 52, as shown by a two-dot chain line in FIG. 8, a portion corresponding to the rear inflation chamber 48 in the airbag 40 and the front inflation chamber The airbag 40 is further bent at the portion corresponding to the inner tether 47 so that the portion corresponding to 49 contacts each other at a position sandwiching the inner tether 47. Therefore, when the airbag 40 is deployed and inflated, the airbag 40 is bent greatly and tries to push back the occupants P1 and P2 (occupant P2 in the example of FIG. 8), so that the occupants P1 and P2 are more effectively prevented from falling down. can do.

  (4) When the airbag 40 is deployed and inflated, the inner tether 47 that promotes the folding of the airbag 40 is inclined so as to fall backward with respect to the vertical direction, in other words, with respect to the vertical direction of the seat back 17. It will be in the state inclined according to inclination. For this reason, when the airbag 40 is bent at a portion corresponding to the inner tether 47, the front expansion chamber 49 of the airbag 40 is occupants P1, P2 (in the example of FIG. P2) is pressed from the side and front. Thereby, the fall of passenger | crew P1, P2 can be suppressed much more effectively.

  (5) The length of the inner tether 47 is set to a length that realizes the above (B). For this reason, when the airbag 40 is bent at a portion corresponding to the inner tether 47, the front end TPf of the inner tether 47 is adjacent to the seat (the seat 14 in FIG. 8) to which the airbag 40 is fixed (FIG. 8). Then, the height position corresponding to the seat cushion 16 of the seat 13) is reached. As a result, the airbag 40 repels the seat cushion 16 and tries to push the occupants P1, P2 of the seat 14 provided with the airbag 40 more strongly. Thereby, the fall of passenger | crew P1, P2 can be suppressed much more effectively.

[Second Embodiment]
Next, a second embodiment of the far side airbag device will be described with reference to FIGS. Note that in the second embodiment, the same portions as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof is omitted.

  As shown in FIG. 9, the airbag 80 of the present embodiment has two cloth pieces 41 that are folded in two along the fold line L <b> 1 and overlapped in the thickness direction (direction orthogonal to the paper surface of FIG. 9). An annular coupling portion 81 that couples the central portion is provided. And, between the cloth pieces 41 stacked in the thickness direction, the portion surrounded by the annular coupling portion 81 is not supplied with the inflation gas, and the non-expansion portion 82 that is not expanded by the inflation gas. It has become.

  In the airbag 80, the portion between the cloth pieces 41 folded in two and stacked in the thickness direction and in front of the non-inflatable portion 82 is a front-side inflating chamber 83. A portion on the rear side of the portion 82 is a rear expansion chamber 84. Specifically, the front expansion chamber 83 is located on the front side and the upper side of the non-expansion portion 82, while the rear expansion chamber 84 is located on the rear side and the lower side of the non-expansion portion 82.

  The distance X1 from the front peripheral edge of the non-inflatable portion 82 of the cloth piece 41 corresponding to the front expansion chamber 83 to the front peripheral edge of the airbag 80 is the non-expandable portion of the cloth piece 41 corresponding to the rear expansion chamber 84. The distance X2 is shorter than the distance X2 from the rear peripheral edge 82 to the rear peripheral edge of the airbag 80. Thereby, the front expansion chamber 83 is made smaller than the rear expansion chamber 84.

  Outer tethers 85, 86, 87, 88 are provided on the cloth piece 41 of the airbag 80. The outer tethers 85, 86, 87 are on the side of the occupants P1, P2 (see FIG. 9) seated on the seats 13, 14 on the side far from the side walls 11, 12 where the impact is applied in the airbag 80 when deployed and inflated. In the example, the cloth piece 41 is provided so as to be positioned on the passenger P2 side) of the seat 14. The outer tether 88 is provided at the rear end of the upper edge of the cloth piece 41.

  The outer tether 85 extends substantially in the front-rear direction and has a front end portion coupled to the front portion of the airbag 80 to serve as a tether that regulates forward deployment and inflation of the airbag 80. The front end portion of the outer tether 85 is coupled to the front peripheral edge of the cloth piece 41 in the airbag 80 at a position indicated by a one-dot chain line L2. The outer tether 86 extends substantially in the front-rear direction, and the front end portion of the outer tether 86 is coupled to the non-inflatable portion 82 of the airbag 80. Further, the outer tethers 87 and 88 extend substantially in the vertical direction, and the lower ends of the outer tethers 87 and 88 are respectively coupled to the lower rear periphery and the rear upper periphery of the cloth piece 41 in the airbag 80. .

  FIG. 10 shows the frame 18 of the seat 14 to which the airbag 80 is attached. The frame 18 includes a pair of side portions 23 and 24 extending in the vertical direction, and an upper pipe 25 extending in the left-right direction (vehicle width direction) so as to connect the upper ends of the side portions 23 and 24. Further, the frame 18 has an upper back plate 26 extending in the left-right direction so as to connect the lower part of the upper pipe 25 at the upper part of the side parts 23, 24 and the left and right so as to connect the lower part of the side parts 23, 24. A lower back plate 27 extending in the direction.

  The airbag 80 is fixed to the frame 18 (in this example, the side portion 24) by a bolt together with the retainer 32. The rear end portions of the outer tethers 85 and 86 of the airbag 80 are fixed to the upper back plate 26 at a position higher than the fixing position of the airbag 80 with respect to the side portion 24 by bolts or the like. Further, the upper end portion of the outer tether 87 of the airbag 80 is fixed to the lower back plate 27 at a position lower than the fixing position of the airbag 80 with respect to the side portion 24 by bolts or the like. The upper end portion of the outer tether 88 of the airbag 80 is fixed to the upper pipe 25 with a bolt or the like.

  The airbag 80 is fixed to the frame 18 (side portion 24) together with the retainer 32 as described above, and the outer tethers 85, 86, 87, and 88 are fixed to the frame 18 as described above. It is folded and accommodated in the seat back 17 (FIG. 11). When the airbag 80 is deployed and inflated from the rear to the front in response to the supply of the inflation gas from the inflator 31, such deployment and inflation are restricted by the outer tether 85 (FIG. 10). That is, the length in the front-rear direction of the outer tether 85 is determined so that such regulation is performed.

  As described above, when deployment and inflation of the airbag 80 toward the front are restricted by the outer tether 85, the front portion of the airbag 80 is seated on the seat 14 provided with the airbag 80 with respect to the rear portion. It tries to bend to the passenger P2 side. Such bending of the airbag 80 is likely to occur in a portion of the airbag 80 where the bending of the airbag 80 is not hindered, that is, the non-inflatable portion 82 of the airbag 80. As can be seen from the above, the non-inflatable portion 82 in the airbag 80 functions as a folding promoting portion that promotes the folding of the airbag 80 during deployment and inflation.

  When a side impact is applied to the side walls 11 and 12 of the vehicle 10, the heads of the occupants P1 and P2 seated on the seats 13 and 14 on the side far from the side walls 11 and 12 to which the impact is applied. Try to fall to the side. FIG. 11 shows a state where the head of the occupant P2 is about to fall to the side (left side in FIG. 11). The length in the front-rear direction of the outer tether 85 (FIG. 10) is such that when the airbag 80 is deployed and inflated, the head that tends to fall sideways in the occupant P2 is supported from below by the front upper portion of the airbag 80. It is also set to be as long as possible. Therefore, as shown in FIG. 11, the head of the occupant P2 is supported from below by the front upper portion of the deployed and inflated airbag 80, so that the head of the occupant P2 does not fall sideways. .

  The outer tether 86 of the airbag 80 shown in FIG. 9 is positioned in the front-rear direction of the non-inflatable portion 82 when the airbag 80 is deployed and inflated so that the airbag 80 is more easily bent at the non-inflatable portion 82. It is for fixing, and has a length in the front-rear direction that can realize such a thing. Further, the outer tethers 87 and 88 of the airbag 80 are used to pull the airbag 80 upward and downward so that the airbag 80 that is deployed and inflated forward is not displaced upward and downward. It has a length that can realize such a thing.

According to the embodiment described above in detail, in addition to the effect (1) in the first embodiment, the following effects can be obtained.
(6) When the heads of the occupants P1, P2 are to be tilted sideways by impact from the side with respect to the side wall parts 11, 12 of the vehicle 10, the heads are deployed and inflated from below by the front upper part of the airbag 80. Since it is supported, the heads of the passengers P1 and P2 can be prevented from falling sideways.

  (7) In the airbag 80, the front expansion chamber 83 is smaller than the rear expansion chamber 84. For this reason, when deployment and inflation of the airbag 80 toward the front are restricted by the outer tether 85, the hoop stress generated in the front-side inflation chamber 83 of the airbag 80 can be suppressed to a small extent. The portion that forms the front expansion chamber 83 is easily bent toward the passengers P1 and P2.

[Third Embodiment]
Next, a third embodiment of the far side airbag apparatus will be described with reference to FIGS. Note that in the third embodiment, parts that are the same as in the second embodiment are given the same reference numerals as in the second embodiment, and detailed descriptions thereof are omitted.

  As shown in FIG. 12, the outer tethers 85, 86, 87 in the airbag 80 of the present embodiment are obtained by joining two base fabrics stacked in the thickness direction along solid lines L6, L7, L8. Is formed. Thus, the strength of the outer tethers 85, 86, 87 is ensured by the two base fabrics, and the base fabrics are not shifted from each other when the airbag 80 is deployed and inflated.

  In addition, in the portion where the front end portion of the outer tether 85 in the front portion of the airbag 80 is joined, a dividing portion for partitioning the auxiliary expansion chamber 91 above the front end portion of the outer tether 85 in the airbag 80. 92 is formed. In the airbag 80, the divided portion 92 is folded in two along the fold line L1, and the cloth pieces 41 overlapped in the thickness direction (direction perpendicular to the paper surface of FIG. 12) are joined together. The airbag 80 is formed so as to extend over the entire front-rear direction (left-right direction in FIG. 12). The dividing portion 92 divides the auxiliary expansion chamber 91 and the front expansion chamber 83 in the airbag 80.

  The dividing portion 92 is located at a position where the front end portion (left end portion in FIG. 12) and rear end portion (right end portion in FIG. 12) are removed, inside and outside the auxiliary expansion chamber 91 in the airbag 80, specifically, the auxiliary expansion chamber 91. And a communication passage 93 that communicates with the front expansion chamber 83. The front end portion of the outer tether 85 is coupled to at least a portion of the front portion of the airbag 80 corresponding to the communication path 93 of the divided portion 92. At this time, the front end portion of the outer tether 85 may approach the entire portion corresponding to the communication passage 93, or the front end portion of the outer tether 85 may approach only a part of the portion corresponding to the communication passage 93. Also good.

  When the airbag 80 is deployed and inflated from the rear to the front in response to the supply of the inflation gas from the inflator 31, such deployment and inflation are restricted by the outer tether 85, so that the front portion of the airbag 80 is The rear part tends to bend toward the passenger P2 seated on the seat 14 provided with the airbag 80. Further, as shown in FIG. 13, the head of the occupant P2 is supported from below by the front upper portion of the deployed and inflated airbag 80 so that the head of the occupant P2 does not fall sideways. At this time, the auxiliary expansion chamber 91 is positioned corresponding to the side of the head of the occupant P2 (the portion of the occupant P2 above the front end of the outer tether 85 (FIG. 12)). The head of P2 is shielded from the side by the auxiliary expansion chamber 91.

According to this embodiment, in addition to the effects (6) and (7) of the second embodiment, the following effects can be obtained.
(8) When the airbag 80 is deployed and inflated forward, the airbag 80 not only bends efficiently to the occupant side and pushes back the occupant, but the auxiliary inflation chamber 91 is located outside the occupant. It comes to correspond to the side of the part (for example, a passenger | crew's head) above the front-end part of the tether 85. For this reason, the said part of a passenger | crew can be shielded with respect to the side by the auxiliary | assistant expansion chamber 91. FIG.

  (9) When the inflation gas flows into the auxiliary inflation chamber 91 via the communication passage 93 of the dividing portion 92 when the airbag 80 is deployed and inflated, the inflation gas moves forward and backward in the auxiliary inflation chamber 91. By flowing, the auxiliary expansion chamber 91 is evenly expanded and expanded toward the front side and the rear side. On the other hand, when the auxiliary expansion chamber 91 expands and expands in this way, the portion corresponding to the communication passage 93 in the auxiliary expansion chamber 91 is less likely to be folded toward the occupant side with the inflow of the expansion gas, but the communication in the dividing portion 92 is not performed. In the portions corresponding to the front end side and the rear end side with respect to the passage 93, the bending to the occupant side is not inhibited by the flow of the inflation gas. This is because the communication passage 93 is formed at a position where the front end portion and the rear end portion of the divided portion 92 are removed, and the front end portion and the rear end portion of the divided portion 92 are expanded from the front expansion chamber 83 to the auxiliary expansion chamber 91. This is because the inflow of working gas does not occur. Therefore, the auxiliary expansion chamber 91 as a whole can be easily folded to the occupant side with the dividing portion 92 as a fulcrum at the time of expansion and expansion, and accordingly, a portion above the front end portion of the outer tether 85 in the occupant side It will be shielded against.

  (10) When the auxiliary expansion chamber 91 expands and expands, the portion corresponding to the communication passage 93 in the auxiliary expansion chamber 91 is less likely to be folded toward the occupant side with the inflow of the expansion gas. However, when the deployment and inflation of the airbag 80 are restricted by the outer tether 85, the front end portion of the outer tether 85 is coupled to the portion corresponding to the communication path 93 of the divided portion 92 in the front portion of the airbag 80. Therefore, the portion is pulled by the outer tether 85, whereby the auxiliary expansion chamber 91 can be easily broken toward the occupant side.

[Other Embodiments]
In addition, each said embodiment can also be changed as follows, for example.
-In 1st Embodiment, about the inner side tether 47 in the airbag 40, when the airbag 40 is expand | deployed and inflate, along the front edge of the side part in which the airbag 40 was provided in the seat back 17 (FIG. 4). The joining position of the inner tether 47 with respect to the cloth piece 41 and the joining position of the inner tethers 47 may be determined. In this case, the portion corresponding to the front inflation chamber 49 of the airbag 40 during deployment and inflation is more easily bent than the portion corresponding to the rear inflation chamber 48.

-In 1st Embodiment, you may change the length of the front-back direction of the outer side tethers 51 and 52 suitably.
In the first embodiment, only one of the outer tether 51 and the outer tether 52 may be provided.

  -In 1st Embodiment, although the inner side tether 47 was illustrated as a bending promotion part, the inner side tether 47 was abbreviate | omitted and the cloth pieces 41 piled up in the thickness direction were shown with the dashed-dotted line L5 of FIG.5 and FIG.6. It joins directly in the position shown, and it is good also considering the junction part as a bending promotion part.

  In the first to third embodiments, the airbags 40 and 80 are fixed to strength members other than the frame 18 in the seats 13 and 14, or portions between the seat 13 and the seat 14 in the vehicle 10 (console box Etc.).

  In the second embodiment, as shown in FIG. 14, the front expansion chamber 83 may be larger than the rear expansion chamber 84. In this case, the distance X1 from the front peripheral edge of the non-inflatable portion 82 of the portion corresponding to the front expansion chamber 83 in the cloth piece 41 to the front peripheral edge of the airbag 80 is the portion corresponding to the rear expansion chamber 84 in the cloth piece 41. The distance is set to be longer than the distance X2 from the rear peripheral edge of the non-inflatable portion 82 to the rear peripheral edge of the airbag 80.

In the second and third embodiments, the outer tethers 86, 87, 88 are not necessarily provided.
-In 3rd Embodiment, you may change suitably the position of the communicating path 93 in the division part 92 in the position near the front end part in the division part 92, and the position near the rear end part.

The far side airbag device may be applied to a vehicle in which three or more seats are arranged in the width direction.
-You may apply a far side airbag apparatus to vehicles other than a vehicle, for example, an aircraft and a ship.

  DESCRIPTION OF SYMBOLS 10 ... Vehicle, 11 ... Side wall part, 12 ... Side wall part, 13 ... Seat, 14 ... Seat, 16 ... Seat cushion, 17 ... Seat back, 18 ... Frame, 31 ... Inflator, 32 ... Retainer, 33 ... Bolt, 34 ... Nuts, 40 ... airbag, 40a ... opening, 41 ... cloth piece, 42 ... mounting hole, 43 ... cloth piece, 44 ... inner bag, 45 ... communication part, 46 ... communication hole, 47 ... inner tether, 48 ... rear Side expansion chamber, 49 ... front expansion chamber, 50 ... communication portion, 51 ... outer tether, 52 ... outer tether, 53 ... connection hole, 54 ... connection hole, 71 ... impact sensor, 72 ... control device, 80 ... airbag, DESCRIPTION OF SYMBOLS 81 ... Annular coupling part, 82 ... Non-expansion part, 83 ... Front expansion chamber, 84 ... Rear expansion chamber, 85 ... Outer tether, 86 ... Outer tether, 87 ... Outer tether, 88 ... Outer tether, 91 ... Auxiliary expansion chamber 92 minutes Part, 93 ... communication passage.

In this way, the inner tethers 47 are joined to each other at the position indicated by the alternate long and short dash line L <b> 5, so that the inner side of the airbag 40 includes the inner bag 44 by the inner tether 47 and the rear expansion chamber 48. It is partitioned into a front expansion chamber 49 located away from the fold line L1. In addition, a portion of the inner tethers 47 joined to each other (a portion corresponding to the alternate long and short dash line L 5 ) does not reach the periphery of the cloth piece 41, and the airbag 40 is between the portion and the periphery of the cloth piece 41. A communication portion 50 that communicates the rear expansion chamber 48 and the front expansion chamber 49 is formed. FIG. 7 shows a cross section of the airbag 40 around the communication portion 50 (inner tether 47).

(3) The length of the outer tethers 51 and 52 is set to a length that realizes the above (A). For this reason, when deployment and inflation of the airbag 40 are restricted by the outer tethers 51 and 52, as shown by a two-dot chain line in FIG. 8, a portion corresponding to the rear inflation chamber 48 in the airbag 40 and the front inflation chamber The airbag 40 is further bent at the portion corresponding to the inner tether 47 so that the portion corresponding to 49 contacts each other at a position sandwiching the inner tether 47. Therefore, when the airbag 40 is deployed and inflated, the airbag 40 is bent greatly and tries to push back the occupants P1 and P2 (occupant P2 in the example of FIG. 8). can do.

(5) The length of the outer tethers 51 and 52 is set to a length that realizes the above (B). For this reason, when the airbag 40 is bent at a portion corresponding to the inner tether 47, the front end TPf of the inner tether 47 is adjacent to the seat (the seat 14 in FIG. 8) to which the airbag 40 is fixed (FIG. 8). Then, the height position corresponding to the seat cushion 16 of the seat 13) is reached. As a result, the airbag 40 repels the seat cushion 16 and tries to push the occupants P1, P2 of the seat 14 provided with the airbag 40 more strongly. Thereby, the fall of passenger | crew P1, P2 can be suppressed much more effectively.

Claims (11)

A plurality of airbags that are fixed to the vehicle in a folded state and that are arranged in the vehicle width direction through the supply of inflation gas when an impact is applied from the side to the side wall of the vehicle. In the far-side airbag device that protects an occupant seated on a seat far from the side wall portion to which an impact is applied by deploying and inflating between the seats from the rear to the front,
A tether that extends in the front-rear direction and has a front end portion coupled to the front portion of the airbag to restrict the deployment and inflation of the airbag forward is provided on the occupant side of the airbag during deployment and inflation. Provided,
Between the rear portion of the airbag and the front portion to which the front end portion of the tether is coupled, a folding promoting portion that promotes the folding of the airbag during deployment and inflation is formed. Far-side airbag device. A plurality of airbags that are fixed to the vehicle in a folded state and that are arranged in the vehicle width direction through the supply of inflation gas when an impact is applied from the side to the side wall of the vehicle. In the far-side airbag device that protects an occupant seated on a seat far from the side wall portion to which an impact is applied by deploying and inflating between the seats from the rear to the front,
A tether that extends in the front-rear direction and has a front end portion coupled to a front portion of the airbag and a rear end portion coupled to a rear portion of the airbag on the occupant side of the airbag when deployed and inflated Is provided,
The length in the front-rear direction of the tether is set to a length that regulates the expansion and inflation from the rear to the front of the airbag,
Bending between the front portion of the airbag to which the front end portion of the tether is coupled and the rear portion to which the rear end portion of the tether is coupled is to facilitate folding of the airbag during deployment and inflation. The far side airbag device, wherein the promotion portion is formed to extend in a direction crossing the tether.   The far-side airbag device according to claim 2, wherein the bending promoting portion is formed so that both ends thereof reach the periphery of the airbag. The bending promoting portion divides the airbag into a rear expansion chamber and a front expansion chamber,
The length of the tether in the front-rear direction is such that when the airbag is deployed and inflated, the portion corresponding to the rear expansion chamber and the portion corresponding to the front expansion chamber sandwich the folding promotion portion. The far-side airbag device according to claim 2 or 3, wherein the far-side airbag device is set to a length in contact with each other. The airbag is fixed to a fixing portion of a seat back in the seat of the vehicle,
The rear end of the tether is fixed together with the rear end portion of the airbag with respect to the fixed portion,
The far-side airbag device according to claim 4, wherein the bending promoting portion is inclined so as to fall rearward with respect to a vertical direction when the airbag is deployed and inflated.   The length in the front-rear direction of the tether is a height position at which the front end of the folding promoting portion in the airbag when deployed and inflated corresponds to a seat cushion of a seat adjacent to the seat provided with the fixing portion. The far-side airbag device according to claim 5, wherein the far-side airbag device is set to a length that reaches a maximum value.   The length of the tether in the front-rear direction is set such that when the airbag is deployed and inflated, the head of the occupant who is about to fall sideways is supported from below by the front upper portion of the airbag. The far side airbag device according to claim 1 or 2.   In the airbag, a portion on the front side of the folding promotion portion is a front expansion chamber, while a portion on the rear side of the bending promotion portion is a rear expansion chamber. The far side airbag device according to any one of claims 1, 2, and 7, wherein a chamber is made smaller than the rear expansion chamber.   In the front portion of the airbag, a portion where the front end portion of the tether is joined is formed with a dividing portion for partitioning the auxiliary expansion chamber above the front end portion of the tether in the airbag. The far side airbag apparatus as described in any one of Claims 1, 2, and 7.   The far-side airbag device according to claim 9, wherein the divided portion has a communication path that communicates the inside and outside of the auxiliary expansion chamber in the airbag at a position where the front end portion and the rear end portion are removed. .   The far side airbag device according to claim 10, wherein a front end portion of the tether is coupled to a portion of the front portion of the airbag corresponding to the communication path of the divided portion.