JP6102791B2 - Front seat airbag device and front seat occupant protection device - Google Patents

Description

  The present invention is configured to include a front seat airbag that is deployed and inflated rearward from a storage portion in front of the front seat in the event of a vehicle collision. Specifically, the front seat airbag is displaced from the storage portion in the left-right direction. The present invention relates to a front-seat airbag device and a front-seat occupant protection device that are configured to be deployed and inflated rearward on the basis of the position.

  Conventionally, a front seat airbag that is stored in front of a front seat of a driver seat or a passenger seat of a vehicle and completes inflating between a driver seat airbag and a passenger seat airbag that are inflated together when deployed. 2. Description of the Related Art A front seat airbag device including a (central airbag) is known (see, for example, Patent Documents 1 and 2).

JP-A-6-24282 JP-A-6-72274

  However, in the conventional front seat airbag device, the front seat airbag is linearly deployed and inflated obliquely rearward from the passenger seat side or the driver seat side. Therefore, if the driver or passenger in the front seat moves forward so that it faces the rearward direction of the front seat airbag, the front seat airbag can be accurately received, but the reverse direction If the passenger on the side of the passenger seat or the driver moves forward, the front seat airbag hits in an oblique direction so as to intersect the front seat airbag that moves backward. It becomes impossible to accurately catch the passenger or driver who is moving forward in the direction of the driver.

  In this case, even if the storage part is displaced in the left-right direction, the operation is performed as long as it is deployed and inflated to the rear side along the front-rear direction instead of the oblique direction with reference to the position displaced from the storage part in the left-right direction. Even if both the passenger and the passenger on the front passenger seat move forward from an oblique direction, the front seat airbag can be suitably received.

  However, the front seat airbag that is deployed and inflated straight rearward from the reference position on the basis of the position shifted in the left-right direction from the storage part is, in other words, shifted in the left-right direction from the storage part and extends rearward. In addition, if the front seat airbag that expands and expands in an L shape when viewed from above is configured to inflate thickly in the vicinity of the storage site, there is a risk of interference with surrounding members.

  The present invention solves the above-described problems, and includes an airbag that suppresses interference with surrounding members in the vicinity of the storage site and can be deployed and inflated in an L shape from the storage site as viewed from above. An object is to provide a front seat airbag device and a front seat occupant protection device.

In the front seat airbag device according to the present invention, the front seat airbag folded and stored in the storage portion in front of the front seat of the vehicle is deployed and inflated from the storage portion to the rear side when inflating gas flows. A front seat airbag device having a configuration,
The front seat airbag is
A gas inflow portion that is fixedly attached to the storage portion and allows an inflating gas to flow; and
A bag main body extending from the front end to the rear side by connecting a front end to one side in the left-right direction of the gas inflow portion;
With
The gas inflow part is
Except for the connection side to the front end of the bag main body, the outer peripheral edges of the top wall and the bottom wall on the lower surface side, which have substantially the same outer shape, are coupled to each other. An inflow opening that opens to allow the inflation gas to flow into the bottom wall portion is configured, and the periphery of the inflow opening is configured as an attachment portion to the storage site,
The front end portion of the bag main body portion is inflated so that the front edge side is connected to the front edge of the gas inflow portion and the thickness dimension from the front edge side toward the rear is gradually increased. It is comprised so that it may continue to a part.

  In the front seat airbag device according to the present invention, the front seat airbag that protrudes from the storage portion and completes the deployment and expansion includes a gas inflow portion that is attached and fixed to the storage portion, and one of the gas inflow portion in the left-right direction. And a bag main body having a front end connected to the side.

  The gas inflow portion has a flat bag structure in which the outer peripheral edges of the top wall and the bottom wall on the upper surface side, which have substantially the same outer shape, are coupled to each other. The thickness dimension can be suppressed to complete the expansion, the interference with the surrounding members can be suppressed, and the inflation gas can be supplied to the bag main body side.

  In addition, the bag main body portion extending from the lateral side of the gas inflow portion to the rear side has a front end that connects the front edge side to the front edge of the gas inflow portion, and is directed rearward from the front edge side. Since the inflating shape gradually increases the thickness dimension, the inflating gas flowing from the gas inflow portion to the front end portion of the bag body portion flows from the front edge side having a small thickness dimension to the rear side increasing the thickness dimension. Therefore, the bag main body portion is inflated so that the main body inflating portion extends rearward from the front end portion by the inflating gas flowing backward in the front end portion. As a result, the front seat airbag is in a state in which the main body inflating portion of the bag main body portion extends rearward with respect to the front end portion of the bag main body portion shifted in the left-right direction from the gas inflow portion attached and fixed to the storage portion, that is, The expansion can be completed in an L shape when viewed from above.

  Furthermore, although the gas inflow portion expands with a reduced thickness dimension, the gas inflow portion is on the upstream side of the expansion gas, and therefore has a high internal pressure and expands with a shape retaining property like a rigid body. And since the front end portion of the bag main body portion is in a state in which the front side is connected to the front edge of the gas inflow portion having shape retaining property, the side surface side is in communication with the gas inflow portion. Then, the gas is held in the gas inflow portion having a high shape retaining property. For this reason, the main body inflating part connected to the rear side of the front end part of the bag main body part smoothly expands from the front end part to the rear side while suppressing swinging in the left-right direction, in other words, blurring in the left-right direction. Can inflate.

  Therefore, in the front seat airbag device according to the present invention, when activated, the front seat airbag suppresses interference with surrounding members in the vicinity of the storage portion, and is L-shaped from the storage portion when viewed from above. Can expand and expand. In the front seat airbag device according to the present invention, the bag body portion of the front seat airbag may be deployed and inflated toward the rear side along the front-rear direction from the front end portion side to the main body inflating portion side. Therefore, for example, a front seat driver such as a front seat driver or a passenger on the front passenger seat may hit the front seat airbag that has been inflated diagonally to the right front side, or vice versa. In addition, even if the vehicle is in a state where it strikes obliquely toward the left front direction, it is possible to receive those front seat occupants equally well without degrading the performance.

  In the front seat airbag device according to the present invention, the front seat airbag extends from an outer edge separated in the left-right direction from the gas inflow portion at the front end portion of the bag main body, and It is desirable to include an outer edge side tether that is fastened together with being fixed to the storage part and fixed to the storage part.

  In such a configuration, the front end portion of the bag body portion communicates with the gas inflow portion and is not only directly held on the gas inflow portion but also on the side surface away from the gas inflow portion on the outer edge side tether. Therefore, the gas inflow portion is connected to the gas inflow portion, and the gas inflow portion is more firmly held. Therefore, the main body inflating part behind the front end of the bag main body part is further prevented from swinging in the left-right direction, in other words, blurring in the left-right direction, and smoothly expands and inflates toward the rear side. be able to.

  Further, in the front seat airbag device according to the present invention, the bag body portion internally connects the vertical tether that connects the wall portions facing each other in the vertical direction when the inflation is completed, and the wall portion facing each other in the left-right direction. It is desirable that the horizontal tether is disposed.

  In such a configuration, the bag main body portion can be expanded and inflated by suppressing the random expansion in the vertical and horizontal directions during the expansion and expansion, maintaining the predetermined expansion form, and even when the expansion is completed, the predetermined expansion is achieved. The completed shape can be secured stably.

Furthermore, in the airbag device for a front seat according to the present invention, as a configuration in which a plurality of the vertical tethers are disposed at least in the front-rear direction,
The vertical tether in the front row and the vertical tether in the second row are arranged with the vertical connection distance shortened on the front row side, and the horizontal tether placed between them. It is desirable that

  In such a configuration, the shape of the bag main body portion that gradually increases the thickness dimension toward the rear side can be easily secured by suppressing the swelling in the left-right direction.

  Further, in the front seat airbag device according to the present invention, the front end portion of the bag main body portion is provided with the vertical tether on the front side in an area in the front-rear direction of the connecting portion with the gas inflow portion. It is desirable that the lateral tether is disposed on the side.

  In such a configuration, since the front end portion of the bag body portion communicated with the gas inflow portion in the front seat airbag is not the horizontal tether but the vertical tether is arranged on the front side, the front edge side is directed rearward. An expanded shape that gradually increases the thickness dimension can be easily secured.

  Furthermore, in the airbag device for a front seat according to the present invention, the bag main body portion is arranged by shifting the vertical tether and the horizontal tether in the front-rear direction, respectively, and in the last row, Desirably, one of the lateral tethers is disposed.

  In such a configuration, the bag body portion of the front seat airbag can stabilize the width dimension in the left-right direction when deployment is completed, and the driver seat airbag is adjacent to the left and right sides of the front seat airbag. When a bag or a passenger seat airbag is disposed, interference with the airbag can be suppressed.

In the front seat airbag device according to the present invention, the bag body portion of the front seat airbag is deployed and inflated from the front side to the rear side of the side of the driver seat airbag when the inflation is completed. In case of configuration,
The bag body portion includes a driver seat side recess having a support surface capable of supporting a front side and a side side approaching the front seat airbag in the driver seat airbag at a rear end when the inflation is completed. It is desirable that the configuration be arranged from the side to the side.

  In such a configuration, the bag body portion of the front seat airbag when the inflation is completed can support the front side and the side side of the driver seat airbag. Even if the vehicle moves closer to the bag, it is supported by the front seat airbag and can be prevented from moving, so that the driver can be received with good cushioning properties. Conversely, even if the front seat airbag moves to the driver seat airbag side, it is supported by the driver seat airbag and further supported by the steering wheel to prevent movement. Seat occupants can be received with good cushioning. Further, even if the driver moves forward between the driver seat airbag and the front seat airbag and moves diagonally forward away from the driver seat airbag, the front seat airbag is A support surface extending to the front side of the driver's seat airbag is provided, and the support surface enables the driver who has passed through the side of the driver's seat airbag to be accurately received.

  Further, in this case, in the front seat airbag device according to the present invention, the driver seat side recess is formed by providing a lateral tether that connects the wall portions facing each other in the left-right direction of the bag main body. Is desirable.

  In such a configuration, the driver's seat side recess can be easily provided in the front seat airbag using the lateral tether.

  Further, in this case, if a raised portion that contacts or approaches the lower side of the driver airbag is disposed on the lower side of the rear end side of the bag body, the driver seat airbag and the front Even if a driver wearing a seat belt moves in a forward-bent state between the seat airbag and the driver's airbag is going to move diagonally downward, the raised portion of the front seat airbag is not The upper body including the driver's head, shoulders, arms, or waist can be accurately received.

Furthermore, in the front seat airbag device according to the present invention,
The front seat airbag is
The bag main body portion is configured to be deployed and inflated on the side of the passenger seat airbag when inflation is completed, and the gas inflow portion is disposed toward the storage portion side of the passenger seat airbag. further,
The storage part of the front seat airbag and the storage part of the passenger seat airbag are shared, and the attachment part of the front seat airbag and the attachment part of the passenger seat airbag to the storage part May be arranged adjacent to each other in the left-right direction.

  In such a configuration, the storage part of the front seat airbag can be shared with the storage part of the passenger airbag, and the space inside the instrument panel in front of the front seat can be effectively used. Of course, the front seat airbag has a planar bag structure in which the gas inflow portion attached and fixed to the storage portion can be expanded by suppressing the thickness dimension in the vertical direction. Even if the bag is inflated by increasing the thickness dimension in the left-right direction or the up-down direction, the gas inflow part smoothly inflates toward the bag body without disturbing the form of expansion of the passenger airbag. It is possible to expand while maintaining the inflow state of the working gas.

  In this case, the front seat airbag may be provided with connecting tethers that connect the bag main body portion and the passenger seat airbag at the time of completion of inflation in at least two positions shifted vertically. desirable.

  In such a configuration, the connecting tether allows the front seat airbag and the passenger seat airbag to both expand and inflate from the storage portion without being separated from each other. The front seat occupant can be received accurately.

  When the storage part is shared with the storage part of the passenger seat airbag, the front seat airbag includes the rear end side of the bag main body when the inflation is completed and the passenger seat airbag when the inflation is completed. A cover cloth for connecting the bag body portion and the passenger seat airbag may be disposed so as to cover the rear of the recess between the rear end side.

  In such a configuration, even if a front seat occupant such as a passenger on the passenger seat attempts to enter between the front seat airbag and the passenger seat airbag when the inflation is completed, the cover cloth is used to provide a good cushioning property. The front seat occupant can be received.

  Further, when the storage part is shared with the storage part of the passenger seat airbag, the front seat airbag has an outer edge side away from the passenger seat airbag on the lower surface side of the bag main body when the inflation is completed. It is desirable to dispose a lower connecting cloth that connects the inner side of the bag main body side on the lower surface side of the passenger seat airbag when inflation is completed.

  In such a configuration, the wall portion of the front seat airbag in the middle of deployment is inflated with the wall portion on the side away from the passenger seat airbag suppressed from being separated from the passenger seat airbag. The left and right blurring is restrained by the passenger seat airbag itself and the lower connecting cloth, and the main body inflating portion that extends rearward from the front end portion is stably deployed and inflated straight toward the rear side. Can do.

  Furthermore, when the storage part is shared with the storage part of the passenger airbag, the vent hole for exhausting the inflation gas of the front seat airbag is a side away from the passenger airbag when the inflation is completed. It is desirable to arrange on the side surface in the left-right direction.

  In such a configuration, even if the front seat airbag is inflated in close proximity to the passenger seat airbag that shares the storage area, the front seat airbag is not blocked by the passenger seat airbag and is smoothly closed. In addition, surplus inflation gas can be exhausted.

In the front seat airbag device according to the present invention,
The bag body is configured in a bag shape from a plurality of bag base fabrics,
It is desirable that the ceiling wall portion and the bottom wall portion of the gas inflow portion are configured to extend from separate bag base fabrics among the plurality of bag base fabrics.

  In such a configuration, since the ceiling wall portion and the bottom wall portion of the gas inflow portion are formed to extend from the bag base fabric that constitutes the bag body portion in a bag shape, the gas inflow portion and the bag A coupling means such as sewing can be avoided as much as possible at the connection portion with the main body portion, the gas sealing property can be ensured, and the connection state between the gas inflow portion and the bag main body portion can be ensured.

In this case, the airbag fabric constituting the bag body is
An upper base fabric constituting an upper side wall portion disposed on the upper surface side of the expansion completed shape;
A lower base fabric constituting a lower wall portion disposed on the lower surface side;
An inflow side base fabric constituting an inflow side wall portion on the side continuous with the gas inflow portion on the side surface in the left-right direction;
A separation-side base fabric constituting a separation side wall portion away from the gas inflow portion on the side surface in the left-right direction;
A rear base fabric constituting the rear side wall portion of the rear surface side;
It consists of 5 pieces of
The inflow side base fabric includes a ceiling side portion constituting a ceiling wall portion of the gas inflow portion,
It is desirable that the lower base fabric includes a bottom side portion that constitutes a bottom wall portion of the gas inflow portion.

  In such a configuration, the bag body portion can be configured to have an inflated shape of a portion extending rearward from the front end portion into a substantially square pillar shape including an upper side wall portion, a lower side wall portion, an inflow side wall portion, and a separation side wall portion. Therefore, the bag body portion has a shape in which the thickness dimension (interval) in the vertical direction of the upper side wall portion and the lower side wall portion is gradually increased toward the rear side, the left and right inflow side wall portions and the separated side wall portions correspond to each other, As appropriate, a vertical tether or the like for connecting the upper side wall and the lower side wall can be provided, for example, so that it can be easily secured. Furthermore, the ceiling side part of the ceiling wall part constituting the gas inflow part is extended from the inflow side base fabric forming the inflow side wall part, and the bottom side part of the bottom wall part constituting the gas inflow part is the lower side wall part. The inflow side wall portion of the bag main body portion and the ceiling wall portion of the gas inflow portion are formed from a single continuous inflow side base fabric. Since the lower wall portion of the bag body portion and the bottom wall portion of the gas inflow portion are formed from a single continuous lower base fabric, the gas inflow portion communicates with the side of the bag body portion. However, the ceiling wall portion and the bottom wall portion of the gas inflow portion are connected to the inflow side wall portion and the lower wall portion of the bag main body portion in a row without using a coupling means such as sewing. It is possible to connect the gas inflow portion and the bag main body portion easily by ensuring gas sealing performance.

  A front-seat occupant protection device comprising a front-seat airbag device and a passenger-seat airbag device so as to share a front-seat airbag storage region and a passenger-seat airbag storage region. Then, it is desirable that the passenger seat airbag is provided with a lateral tether that connects the wall portions facing each other in the left-right direction when the inflation is completed.

  In such a configuration, the passenger seat airbag is regulated by the lateral tether disposed therein to protrude in the front seat airbag side, with the width dimension in the left-right direction being restricted during or after the inflation. It is suppressed. As a result, the passenger seat airbag is restrained from interfering with the front seat airbag, and the front seat airbag is subject to a reaction force when it is shaken in the left-right direction or with the front seat airbag. By suppressing the lateral blur of the bag itself, the front seat airbag and the passenger seat airbag can be smoothly inflated rearward and completed.

  When a lateral tether is provided in the passenger seat airbag, a plurality of lateral tethers that connect the wall portions facing each other in the left-right direction at the time of completion of the inflation are disposed in the front seat airbag. In this case, the lateral tether of the passenger seat airbag is positioned between the lateral tethers that are displaced in the front-rear direction of the front seat airbag when the passenger seat airbag is inflated. It is desirable to arrange so as to be arranged on the side of the.

  In such a configuration, even if the portion between the front and rear lateral tethers in the front seat airbag protrudes toward the passenger seat airbag during or after inflation, the passenger seat airbag remains in that position. Since the lateral tether is arranged, interference between the front seat airbag and the passenger seat airbag can be suppressed accurately. Of course, since the front seat airbag is provided with a plurality of lateral tethers displaced in the front-rear direction, the front seat airbag can be prevented from projecting toward the passenger seat airbag over a long range in the front-rear direction. . Therefore, the front seat airbag and the front passenger airbag are restrained by suppressing the lateral blur of the passenger airbag and the lateral blur of the front airbag itself that receives a reaction force when it interferes with the passenger airbag. The seat airbag can be deployed and inflated more smoothly to the rear side to complete the inflation.

1 is a schematic plan view of a front seat airbag device according to a first embodiment of the present invention. It is a schematic front view of the airbag apparatus for front seats of 1st Embodiment. It is the schematic perspective view seen from the front explaining the inflated state of the airbag for front seats of 1st Embodiment. It is the schematic perspective view seen from back explaining the inflated state of the airbag for front seats of a 1st embodiment. It is a schematic sectional drawing of the inflated state of the airbag for front seats of 1st Embodiment, and respond | corresponds to the VV site | part of FIG. It is a schematic sectional drawing of the inflated state of the airbag for front seats of 1st Embodiment, and respond | corresponds to the VI-VI site | part of FIG. It is a top view which shows the member which comprises the principal part of the airbag for front seats of 1st Embodiment. It is a top view which shows the state which has arrange | positioned the fabric piece which comprises a tether to the base fabric for airbags which comprises the surrounding wall of the airbag for front seats of 1st Embodiment. It is a schematic plan view which shows the time of the action | operation of the airbag apparatus for front seats of 1st Embodiment. It is a schematic front view explaining the action | operation time of the airbag apparatus for front seats of 1st Embodiment. It is the schematic side view seen from the driver's seat side explaining the time of the action | operation of the airbag apparatus for front seats of 1st Embodiment. It is a schematic fragmentary sectional view at the time of expansion | swelling of the airbag for front seats of 1st Embodiment, and respond | corresponds to the XII-XII site | part of FIG. It is a schematic fragmentary sectional view at the time of expansion | swelling of the airbag for front seats of 1st Embodiment, and respond | corresponds to the XIII-XIII site | part of FIG. It is a schematic fragmentary sectional view at the time of expansion | swelling of the airbag for front seats of 1st Embodiment, and respond | corresponds to the XIV-XIV site | part of FIG. It is a schematic perspective view which shows the expansion | swelling state of the passenger seat airbag which shares the storage site | part of the front seat airbag of 1st Embodiment independently. It is the schematic perspective view seen from the front side which shows the inflated state of the airbag for front seats and the airbag for front passenger seats of 1st Embodiment. It is a schematic longitudinal cross-sectional view along the left-right direction of the vehicle in the storage part which shows the inflated state of the airbag for front seats and the airbag for passenger seats of 1st Embodiment. It is a schematic plan view which shows the time of the action | operation of the airbag apparatus for front seats of 2nd Embodiment. It is a schematic front view explaining the time of the action | operation of the airbag apparatus for front seats of 2nd Embodiment. It is the schematic side view seen from the driver's seat side explaining the action | operation time of the airbag apparatus for front seats of 2nd Embodiment. FIG. 20 is a schematic partial cross-sectional view of the front seat airbag according to the second embodiment when the airbag is inflated, and corresponds to the XXI-XXI portion of FIG. 19. It is the schematic perspective view seen from the front explaining the expansion | swelling state of the airbag for front seats in the airbag apparatus for front seats of 3rd Embodiment. It is the schematic perspective view seen from the back explaining the inflated state of the airbag for front seats of 3rd Embodiment. It is a top view which shows the member which comprises the principal part of the airbag for front seats of 3rd Embodiment. It is a schematic plan view which shows the time of the action | operation of the airbag apparatus for front seats of 3rd Embodiment. It is a schematic plan view which shows the time of the action | operation of the airbag apparatus for front seats of 4th Embodiment. It is the schematic perspective view seen from the front explaining the inflated state of the airbag for front seats of 4th Embodiment. It is a schematic plan view which shows the time of the action | operation of the airbag apparatus for front seats of 5th Embodiment. It is the schematic perspective view seen from the front explaining the inflated state of the airbag for front seats of 5th Embodiment. It is a schematic plan view which shows the time of the action | operation of the airbag apparatus for front seats of 6th Embodiment. It is a schematic front view which shows the time of the action | operation of the airbag apparatus for front seats of 6th Embodiment. It is a schematic plan view which shows the time of the action | operation of the airbag apparatus for front seats of 7th Embodiment. It is a schematic front view which shows the time of the action | operation of the airbag apparatus for front seats of 7th Embodiment. FIG. 33 is a schematic partial cross-sectional view of the front seat airbag according to the seventh embodiment when inflated, and corresponds to a portion XXXIV-XXXIV in FIG. 32. It is a schematic plan view which shows the state at the time of the action | operation of the modification of a front seat passenger | crew protection device. FIG. 36 is a schematic perspective view of an inflated state seen from the front of the front seat airbag shown in FIG. 35.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. A front seat airbag device 60 according to a first embodiment includes a driver seat airbag device 20 as shown in FIGS. It is mounted on the passenger seat side portion 4 of the instrument panel (hereinafter, abbreviated as instrument panel as appropriate) 1 with the airbag device 30 for the passenger seat. In the case of the first embodiment, the front seat airbag device 60 protects the front seat occupant M of the driver DM and the passenger seat passenger PM together with the driver seat airbag device 20 and the passenger seat airbag device 30. It constitutes the front seat occupant protection device FAB, and is activated in the event of an oblique collision, offset collision, frontal collision, side collision, etc. of the vehicle V, and each airbag (front seat airbag 61, driver's seat) The airbag 21 and the passenger seat airbag 31) are deployed and inflated substantially rearward from the storage site.

  In each embodiment, the front-rear, up-down, left-right directions are the same as the front-rear, up-down, left-right directions of the vehicle V unless otherwise specified.

  Further, since the front seat airbag device 60 of the first embodiment is mounted between the driver seat airbag device 20 and the passenger seat airbag device 30, it can also be said to be a central airbag device. The front seat airbag 61 can also be said to be a central airbag.

  The driver's seat airbag device 20 is mounted on the boss portion 10 at the center of the steering wheel 9 of the steering device 8. The steering wheel 9 is disposed in front of the driver's seat 13 and steers the vehicle V by gripping the ring portion 11 and rotating it in a predetermined direction.

  The driver's seat airbag 21 is folded and housed in the boss portion 10 of the steering wheel 9, and the driver as the front seat occupant M seated on the driver's seat 13 moving forward when the driver's seat airbag device 20 is operated. An expansion gas from an inflator (not shown) is caused to flow so that the DM can be received, and is expanded and expanded rearward from the boss portion 10 of the storage site. The airbag 21 for the driver's seat has a substantially circular shape whose outer dimension is larger than that of the ring portion 11. The driver-seat airbag 21 is formed by joining the outer peripheral edges of the circular driver-seat side wall 22 and the vehicle body side wall 23 having the same shape, and when the inflation is completed, the vehicle body side wall 23 on the front side is a ring. It is set as the structure supported by the part 11. FIG.

  The passenger seat airbag device 30 is mounted on a portion (passenger seat side portion) 4 of the instrument panel 1 in front of the passenger seat 16. The passenger seat airbag 31 is folded and housed in the passenger seat side portion 4 of the instrument panel 1, and a passenger as a front seat occupant M seated on the passenger seat 16 that moves forward when the passenger seat airbag device 30 operates. The expansion gas G from the inflator 45 (45P) is introduced so that the seat occupant PM can be received, and the rear expansion is performed from the passenger seat side 4 of the instrument panel 1.

  As shown in FIGS. 9 to 11, 15, and 16, the passenger seat airbag 31 has an inflated shape, which is a substantially square pyramid shape with a substantially rectangular occupant side wall portion 32 on the rear side as a bottom wall. A part (lower surface) of the outer surface of the peripheral wall portion 33 is configured to be supported by the rear surface 4 a of the passenger seat side portion 4 of the instrument panel 1. In addition, the passenger | crew side wall part 32 is provided with the recessed part 32a dented in the front side made into the concave groove shape along an up-down direction in the center of the left-right direction.

  In addition, an inflow opening 34 that is opened in a circular shape for allowing the inflation gas to flow in is disposed on the lower surface on the front end side of the peripheral wall portion 33, and the periphery of the inflow opening 34 is attached and fixed to the case 50. This is part 35. The attachment portion 35 is provided with a through hole 35a through which each bolt 42 of a retainer 41 (see FIG. 17) for attachment to the case 50 is inserted.

  Further, a vent hole 33a for exhausting excess inflation gas G is opened on the side surface of the peripheral wall portion 33 away from the front seat airbag 61 when the inflation is completed. In addition, a lateral tether that regulates the width dimension in the left-right direction by connecting the left and right side wall portions (the left wall portion 33b and the right wall portion 33c) to each other on the inner peripheral side of the peripheral wall portion 33 in a strip shape along the left-right direction. 36 (see FIG. 15) are arranged in a predetermined number (two in the illustrated example).

  As shown in FIG. 17, the retainer 41 has a substantially quadrangular annular shape and is configured with bolts 42 extending downward at the four corners. The retainer 41 attaches the airbag 31 to an outer mounting seat 52 on the right side of the mounting base 51 of the case 50 together with the inflator 45 (45P) that inflates the airbag 31. That is, each bolt 42 is inserted into the through hole 35a, the retainer 41 is applied to the attachment portion 35 in the airbag 31, and the main body portion 46 is inserted into the case 50 from below in the flange portion 47 of the inflator 45P. The airbag 31 and the inflator 45P are attached to the case 50 by passing through each bolt 42 and fastening the nut 43 to each bolt 42.

  In the case of the first embodiment, the case 50 has a substantially rectangular box shape, and stores the folded airbag 31 for the front passenger seat and the airbag 61 for the front seat, that is, the airbags 31, 61. It is also used as a storage part for both. As described above, the mounting portion 35 of the passenger seat airbag 31 is mounted on the mounting base 51 serving as the bottom wall of the case 50 on the outer mounting seat 52 on the vehicle outer side (right side) of the vehicle V. A mounting portion 65 (described later) of the front seat airbag 61 is mounted and fixed to an inner mounting seat 53 on the vehicle inner side (left side), which is the center side in the left-right direction of the vehicle V. The seat airbag 31 and the front seat airbag 61 are respectively folded and juxtaposed side by side on the mounting base 51 in the case 50 (specifically, the passenger seat airbag 31 on the right side). And a front seat airbag 61 is disposed on the left side.

  Note that the outer mounting seat 52 and the inner mounting seat 53 of the mounting base 51 have openings 52a through which the cylindrical main body 46 of the inflator 45 (45P, 45C) for inflating the airbags 31, 61 is inserted from below. 53a and through holes (not shown) through which the bolts 42 arranged at the periphery of the openings 52a and 53a are inserted.

  The front seat airbag device 60 includes a front seat airbag (central airbag) 61 that is inflated between the inflated driver seat airbag 21 and the passenger seat airbag 31, and an inflation gas in the airbag 61. And an inflator 45 (45C) for supplying air and a case 50 for storing the folded airbag 61 and the inflator 45C. In the case of the first embodiment, as described above, the case 50 is mounted on the passenger seat side portion 4 in the instrument panel 1 in front of the passenger seat 16 in common with the airbag device 30 for the passenger seat.

  As shown in FIGS. 5 and 17, the inflator 45 </ b> C is an oblique collision, an offset collision, and a frontal collision of the vehicle V, similarly to the inflator (not shown) of the driver airbag device 20 and the inflator 45 </ b> P of the passenger airbag device 30. In addition, the airbag 61 is configured to operate in the case of a side collision, and is configured to supply the inflation gas G to the folded airbag 61 and to expand and inflate the airbag 61 during the operation. . Similarly to the inflator 45P, the inflator 45C includes a columnar main body portion 46 provided with a gas discharge port 46a in the upper portion, and a flange portion 47 protruding from the outer peripheral surface of the main body portion 46. The main body portion 46 of the inflator 45C is inserted from below into the opening 53a of the inner mounting seat 53 of the case 50, and each bolt 42 of the retainer 41 holding the mounting portion 65 of the airbag 61 is inserted into the through hole 65a ( 3) and the inner mounting seat 53, and further through the flange portion 47, and the nut 43 is fastened, whereby the inflator 45C is mounted on the inner side of the case 50 together with the mounting portion 65 of the airbag 61. It is fixed to the seat 53.

  As shown in FIGS. 3 to 6, the front seat airbag 61 is attached and fixed to the inner mounting seat 53 of the mounting base 51 of the case 50 serving as a storage part, and the gas inflow portion through which the inflation gas G flows. 62 and a bag main body 70 that is connected to one side of the gas inflow portion 62 in the left-right direction (left side in the embodiment) and extends from the front end 71 to the rear side. The front-seat airbag 61 at the time of completion of inflation is configured to be supported by bringing the front end side of the lower surface 70c of the bag body 70 into contact with the rear surface 2a of the center cluster 2 near the center in the left-right direction of the instrument panel 1. (See FIG. 11). In addition, the front seat airbag 61 at the time of completion of the inflation is provided with a rear side wall portion 78 on the rear surface side of the bag body portion 70 along a substantially vertical direction. A front seat occupant M that is disposed slightly rearward from the occupant side wall portion 32 on the rear surface side and moves to the center side in the left-right direction of the vehicle V, that is, a passenger seat occupant PM that moves forward in a diagonally left front direction It is set so that the upper body UB including the head H and shoulder S of the driver DM moving to can be received (see FIG. 9).

  The gas inflow portion 62 connects the outer peripheral edges of the top wall 66 and the bottom wall 63 on the lower surface side, which have the same outer shape, except for the connection side to the front end 71 of the bag body 70. In the case of the first embodiment, it has a substantially rectangular plate shape (substantially square plate shape). The bottom wall 63 is provided with a circular inflow opening 64 for allowing the inflating gas to flow in, and the periphery of the inflow opening 64 has a through hole 65a through which each bolt 42 of the retainer 41 passes. It is comprised as the attaching part 65 to the inner side mounting seat 53 of case 50 as a storage part.

  The bag body 70 has a front edge 71a side of the front end 71 that is linear along the left-right direction, and is continuous with the front edge 62a of the gas inflow portion 62, and has a thickness that extends from the front edge 71a toward the rear. As an expansion shape that gradually increases the size, it is configured so as to continue from the front end portion 71 to the main body expansion portion 72 on the rear side.

  As shown in FIGS. 7 and 8, the front seat airbag 61 of the first embodiment includes an upper base fabric 111, a lower base fabric 112, and an inflow side base fabric as the airbag base fabric 110 constituting the outer peripheral wall. 114, a separation-side base fabric 116, and a rear-side base fabric 117. The upper base fabric 111 constitutes the upper side wall portion 75 of the bag main body portion 70, and the lower base fabric 112 has the bottom side portion 113 constituting the bottom wall portion 63 of the gas inflow portion 62. A lower wall portion 74 of 70 is formed. The inflow side base fabric 114 has a ceiling side portion 115 that constitutes the ceiling wall portion 66 of the gas inflow portion 62, and an inflow side wall portion 76 that is a side wall portion on the gas inflow portion 62 side of the bag main body portion 70. The separation side base fabric 116 constitutes a separation side wall portion 77 which is a side wall portion on the side away from the gas inflow portion 62 of the bag main body portion 70. The rear base fabric 117 constitutes a rear side wall portion 78 of the bag main body portion 70.

  In the upper base fabric 111, the front edge 111a is sewn to the front edge 112a excluding the bottom side portion 113 of the lower base fabric 112, and the rear edge 111b is sewn to the upper edge 117a of the rear base fabric 117. . Further, the upper base fabric 111 has a left edge 111c stitched to the upper edge 116a of the separation-side base fabric 116, and a right edge 111d stitched to the upper edge 114a of the inflow side base fabric 114.

  And the stitching | suture site | parts of the front edges 111a and 112a are exposed to the outer surface side like the stitching site | part of the front edge 62a of the gas inflow part 62 mentioned later unlike the other peripheral part. .

  The lower base fabric 112 has a front edge 112a excluding the bottom side portion 113 sewn with a front edge 111a of the upper base fabric 111, and a rear edge 112b sewn with a lower edge 117b of the rear base fabric 117. The lower base fabric 112 has a left edge 112c sewn with a lower edge 116b of the separation side base fabric 116, and a right edge 112d excluding the bottom side portion 113 sewn with a lower edge 114b of the inflow side base fabric 114. Yes.

  The inflow side base fabric 114 has the upper edge 114a sewn to the right edge 111d of the upper base fabric 111, the lower edge 114b excluding the ceiling side portion 115 sewn to the right edge 112d of the lower base fabric 112, and the rear edge 114c. Is stitched to the right edge 117d of the rear base fabric 117.

  The separation-side base fabric 116 has an upper edge 116 a stitched to the left edge 111 c of the upper base fabric 111, a lower edge 116 b stitched to the left edge 112 c of the lower base fabric 112, and a rear edge 116 c to the rear base fabric 117. The left edge 117c is stitched.

  The rear base fabric 117 has an upper edge 117 a stitched to the rear edge 111 b of the upper base fabric 111, a lower edge 117 b stitched to the rear edge 112 b of the lower base fabric 112, and a left edge 117 c secured to the remote base fabric 116. The right edge 117d is sewn to the rear edge 114c of the inflow-side base fabric 114, and is sewn to the rear edge 116c.

  And the ceiling side part 115 provided in the inflow side base fabric 114 and the bottom side part 113 provided in the lower side base fabric 112 are front edge 115a, 113a mutual, rear edge 115b, 113b mutual, and right edge. 115c and 113c are stitched together. In the stitched portion at the outer peripheral edge of the gas inflow portion 62 composed of the ceiling side portion 115 and the bottom side portion 113, all seams are exposed on the outer surface side. Then, the stitched portion between the front edges 115a and 113a and the stitched portion between the front edge 111a of the upper base fabric 111 and the front edge 112a of the lower base fabric 112 expose the seam allowance to the outer surface side. It is sewn so as to be connected in a straight line in the left-right direction (surface sewing is performed).

  Moreover, these base fabrics 111, 112, 113, 114, and 115 are formed from woven fabrics, such as polyamide.

  Further, the airbag 61 includes an outer edge side tether 80 extending from an outer edge (left edge) 71 b that is separated from the gas inflow portion 62 in the front end portion 71 of the bag main body portion 70 in the left-right direction. The outer edge side tether 80 is fastened together when the mounting portion 65 is fixed to the inner mounting seat 53. Therefore, two through holes 80a through which the bolts 42a of the retainer 41 are inserted are formed in the front and rear at the tip of the outer edge side tether 80. If the airbag 61 is completely inflated in a state where the outer edge side tether 80 is attached and fixed to the left edge side of the inner mounting seat 53, the outer edge 71b side of the front end portion 71 is reversed below the lower side wall portion 74. It will be in the state pulled by the right side (refer to Drawings 9 and 17).

  Further, as shown in FIGS. 3, 4, and 6, the bag main body portion 70 has a substantially quadrangular prism-like expansion shape that gradually increases the thickness dimension in the vertical direction from the front edge 71 a to the rear side wall portion 78 when the expansion is completed. A vertical tether 82 that connects the upper side wall 75 and the lower side wall 74 that face each other in the vertical direction when the expansion is completed, and an inflow side wall 76 and a separation side wall 77 that face each other in the left and right direction so as to be maintained. A lateral tether 86 to be connected is disposed.

  And in the case of 1st Embodiment, the vertical tether 82 is comprised with the two 1st vertical tethers 83 and the 2nd vertical tether 84 which shifted | deviated back and forth as a strip | belt shape which provided the width direction in the left-right direction. . The first vertical tether 83 in the foremost row has a lower vertical connection distance between the lower wall portion 74 and the upper wall portion 75 than the second vertical tether 84 in the second row (connection distance CL1 <connection distance CL2). ), Which is disposed (see FIG. 6).

  The lateral tether 86 is configured to include four that are displaced in the front-rear direction and are respectively disposed along the left-right direction. That is, the four horizontal tethers 86 are arranged as a first horizontal tether 87, a second horizontal tether 88, a third horizontal tether 89, and a fourth horizontal tether 90 in order from the front row side.

  Although simplified in FIGS. 3 and 4, each of the tethers 83, 84, 87, 88, 89, 90 is a pair of cloth pieces 83a, 84a, 87a, 88a, 89a, 90a extending from opposing wall portions, respectively. Are connected to each other (see FIGS. 7 and 8).

  The first horizontal tether 87 is disposed between the first vertical tether 83 in the foremost row and the second vertical tether 84 in the second row. The fourth horizontal tether 90 in the last row is disposed behind the vertical tether 82 and is disposed as the last row of tethers disposed in the airbag 61.

  In the case of the first embodiment, in the front end portion 71 of the bag main body portion 70, the first vertical tether 83 is disposed on the front side in the front-rear direction area of the connection portion with the gas inflow portion 62, and on the rear side. A first horizontal tether 87 is provided.

  Furthermore, in the first embodiment, as shown in FIGS. 3, 4, 9, and 10, the bag main body 70 is deployed and inflated from the front side to the rear side on the side of the driver airbag 21 when the inflation is completed. It is configured to do. A driver-side recess 92 is disposed from the rear end 70a when the inflation is completed to the side surface 70b on the driver-seat airbag 21 side so as to accommodate the right end side of the driver-seat airbag 21 when the inflation is completed. ing. The inner peripheral surface of the driver-seat-side recess 92 is a support surface 93 that can support the driver-seat airbag 21, and this support surface 93 is the front-seat airbag 61 in the driver-seat airbag 21 when the inflation is completed. The front support portion 93a capable of supporting the front surface 21a side approaching the side and the side support portion 93b capable of supporting the side 21b side approaching the airbag 61 are provided.

  Then, the third lateral tether 89 has an inflow side wall portion 76 (inflow side base) facing in the left-right direction in the area of the lateral support portion 93b that is shifted rearward from the front support portion 93a so that the driver seat side recess 92 can be formed. The cloth 114) and the separation side wall 77 (separation side base cloth 116) are connected to each other.

  Further, in the front seat airbag 61 of the first embodiment, as shown in FIGS. 9, 10, 12, and 13, the bag body is configured to be deployed and inflated to the side of the passenger seat airbag 31 when the inflation is completed. The connecting tethers 98 and 99 that connect the portion 70 and the passenger seat airbag 31 at the completion of the inflation are disposed in at least two positions shifted vertically. The tethers 98 and 99 are also formed by connecting a pair of cloth pieces 98a and 99a (101a) connected to the bag body 70 side and the airbag 31 side.

  Further, in the airbag 61 of the first embodiment, the rear of the recess 102 between the rear end 70a side of the bag body 70 when the inflation is completed and the rear end 31a side of the passenger seat airbag 31 when the inflation is completed is provided. A cover cloth 101 that connects the bag body 70 and the passenger airbag 31 is disposed so as to be covered. In the case of the embodiment, the lower connecting tether 99 is constituted by the cover cloth 101.

  Furthermore, in the airbag 61 of the embodiment, as shown in FIGS. 9 and 14, the outer edge (left edge in the embodiment) 70d that is separated from the passenger seat airbag 31 on the lower surface 70c side of the bag main body 70 when the inflation is completed. A lower connecting cloth 103 is provided to connect the side and the inner edge (left edge in the embodiment) 31c side of the bag main body 70 side on the lower surface 31b side of the passenger seat airbag 31 at the time of completion of inflation. Yes. The lower connecting cloth 103 is located near the middle in the front-rear direction of the portion of the airbag 31, 61 at the time of completion of inflation that is separated from the rear surfaces 2 a, 4 a of the instrument panel 1 in the rearward direction, or toward the rear ends 31 a, 71 a from the middle portion. Have been placed. The lower connecting cloth 103 is formed by connecting a pair of cloth pieces 103a connected to the airbags 61 and 31, respectively.

  Further, in the front seat airbag 61, the vent hole 79 for exhausting the inflation gas is formed on the side surface in the left-right direction on the side away from the passenger seat airbag 31 when the inflation is completed, that is, the driver seat airbag. The separation side wall 77 on the 21 side is provided. Further, the vent hole 79 is disposed at a position in front of the driver seat side recess 92 so as not to be blocked by the driver seat airbag 21.

  The front seat airbag device 60 and the passenger seat airbag device 30 according to the first embodiment are mounted on the vehicle V by first causing the bolts 42 to protrude from the through-holes 65a and then the gas in the front seat airbag 61. The retainer 41 is accommodated in the inflow portion 62. Similarly, the retainers 41 are housed in the passenger seat airbag 31 by projecting the bolts 42 from the through holes 35a. The front seat airbag 61 and the passenger seat airbag 31 are folded and placed on the mounting base 51 so as to be accommodated in the case 50, and the bolts 42 of the retainers 41 are mounted on the outer mounting seat 52 and the inner seat. It protrudes from the through hole of the mounting seat 53. The front seat airbag 61 is housed in the case 50 in a state where the corresponding bolt 42 on the left edge side of the retainer 41 is passed through the two through holes 80 a at the tip of the outer edge side tether 80.

  Then, the main body 46 of the corresponding inflator 45C, 45P is inserted into the case 50 from below through the openings 53a, 52a, the bolts 42 are passed through the flanges 47, and the nuts 43 are fastened to the bolts 42. Then, the front seat airbag 61 folded together with the inflator 45C can be mounted and fixed on the inner mounting seat 53 of the mounting base 51, and the passenger seat airbag folded together with the inflator 45P on the outer mounting seat 52. 31 can be attached and fixed. When the nut 43 is fastened, the outer edge side tether 80 is fixedly attached to the inner mounting seat 53 of the case 50 with the tip thereof fastened together with the mounting portion 65.

  Thereafter, the case 50 is connected to a bracket extending from a predetermined instrument panel hose of the vehicle V, and lead wires for inputting operation signals extending from a control device (not shown) for operating the airbag devices 60 and 30 are connected to the inflators 45C and 45P. If the instrument panel 1 is assembled to the vehicle V, the front seat airbag device 60 and the passenger seat airbag device 30 can be mounted on the vehicle V. Further, separately, the steering wheel 9 assembled with the driver seat airbag device 20 is connected to the steering device 9 while connecting an operation signal input lead wire extending from a control device (not shown) to the inflator of the driver seat airbag device 20. 8, the driver seat airbag device 20 can be mounted on the vehicle V, and the driver seat airbag device 20, the passenger seat airbag device 30, and the front seat airbag device 60 are provided. The front-seat occupant protection device FAB that is provided can be mounted on the vehicle V.

  If the front seat occupant protection device FAB is activated after being mounted on the vehicle V, the driver seat airbag 21, the passenger seat airbag 31, and the front seat airbag 61 are respectively boss portions that are storage portions. It expands and expands while protruding rearward from 10a and the case 50.

  In the front seat airbag device 60 of the first embodiment, the airbag 61 into which the inflation gas G from the inflator 45C has flowed inflates and covers the instrument panel 1 that has covered the case 50 as a storage part. The provided airbag cover (not shown) is pushed open to expand and inflate rearward. That is, with respect to the front end 71 connected to the left side of the gas inflow portion 62 attached to the inner mounting seat 53 of the case 50 of the airbag 61, the main body inflating portion 72 on the rear side of the front end 71 is The bag body portion 70 is expanded and inflated, and the expansion is completed as an expansion completion shape extending rearward from the center cluster 2 of the instrument panel 1 in a substantially square shape (see FIGS. 9 and 10).

  In the airbag 61 at the time of completion of the inflation, as shown in FIGS. 3, 16, and 17, the gas inflow portion 62 includes a ceiling wall portion 66 on the upper surface side and a bottom wall portion on the lower surface side in which the outer shape is substantially square. 63, because of the planar bag structure in which the outer peripheral edges of 63 (front edge 62a (115a, 113a) mutual, rear edge 62b (115b, 113b) mutual, outer edge 62c (115c, 113c) mutual) are combined. The thickness dimension in the vertical direction can be easily suppressed and inflation can be completed easily, and interference with the lower surface 31e side and the left surface 31f side of the front end 31d of the passenger seat airbag 31 that is a surrounding member is suppressed. Thus, the inflation gas G can be supplied to the bag body 70 side.

  Further, the bag main body portion 70 extending from the left side to the rear side of the gas inflow portion 62 has a linear gas that has a front end 71 that is sewn on a plane with the front edge 71a side exposed to the outer surface side and seam allowance. Since it has an inflated shape that is connected to the front edge 62a of the inflow portion 62 in a straight line and gradually increases the thickness dimension from the front edge 71a side toward the rear, the bag main body portion 70 extends from the gas inflow portion 62. The expansion gas G flowing into the front end portion 71 flows from the front edge 71a side having a small thickness dimension to the rear side to increase the thickness dimension. Therefore, the bag main body portion 70 is inflated so that the main body inflating portion 72 extends rearward from the front end portion 71 by the inflation gas G flowing backward in the front end portion 71. As a result, the front seat airbag 61 is inflated with respect to the front end portion 71 of the bag body 70 that is shifted to the left in the left-right direction from the gas inflow portion 62 attached and fixed to the case 50. The expansion can be completed in a state where the portion 72 extends rearward, that is, in an L shape as viewed from above.

  Furthermore, although the gas inflow portion 62 expands with a reduced thickness dimension, the gas inflow portion 62 is on the upstream side of the expansion gas G, and therefore has a high internal pressure and expands with a shape retaining property like a rigid body. The front end 71 of the bag main body 70 connects the front edge 71a to the front edge 62a of the gas inflow portion 62 having shape retaining property, and the gas inflow side portion 76 side is connected to the gas inflow portion 62 side. Therefore, the gas inflow portion 62 having a high shape retaining property is held. Therefore, the main body inflating portion 72 connected to the rear side of the front end portion 71 in the bag main body portion 70 is prevented from swinging in the left-right direction, in other words, blurring in the left-right direction, from the front end portion 71 toward the rear side. Can be deployed and expanded smoothly.

  Therefore, in the front seat airbag device 60 of the first embodiment, during operation, the front seat airbag 61 suppresses interference with the surrounding passenger seat airbag 31 in the vicinity of the case 50, and from above. It can expand and expand in an L shape from the case 50 as a storage part. In the front seat airbag device 60 according to the first embodiment, the bag main body portion 70 of the front seat airbag 61 extends from the front end portion 71 side to the main body inflating portion 72 side toward the rear side along the front-rear direction. The front seat occupant M such as the front seat driver DM or the front passenger occupant PM is directed diagonally to the right front side of the front seat airbag 61 that has been inflated. Even in the state of hitting, or conversely, in the state of hitting toward the left front direction, it is possible to receive those front seat occupants M equally well without degrading the performance. .

  In the front seat airbag device 60 according to the first embodiment, the front seat airbag 61 extends from the outer edge 70d that is separated from the gas inflow portion 62 in the front end portion 71 of the bag main body portion 70 in the left-right direction. An outer edge side tether 80 that is fastened together and fixed to the case 50 when the case 50 is fixed to the inner mounting seat 53 in the portion 65 is provided.

  Therefore, in the first embodiment, the front end portion 71 of the bag main body 70 communicates with the gas inflow portion 62 and is not only directly held by the gas inflow portion 62 but also on the side of the inflow side wall 76. The side wall 77 on the side away from the inflow portion 62 is also connected to the gas inflow portion 62 by the outer edge side tether 80, and is configured to be more firmly held by the gas inflow portion 62. Therefore, the main body inflating portion 72 behind the front end portion 71 of the bag main body portion 70 is further prevented from swinging in the left-right direction, in other words, blurring in the left-right direction, and smoothly toward the rear side. Can expand and expand.

  Further, in the front seat airbag device 60 of the first embodiment, the bag body portion 70 is opposed to the vertical tether 82 that connects the wall portions 74 and 75 facing each other in the vertical direction when the inflation is completed. A horizontal tether 86 for connecting the wall portions 76 and 77 to each other is disposed.

  Therefore, in the first embodiment, the bag main body portion 70 can be expanded and inflated while maintaining a predetermined expansion form by suppressing the random expansion in the vertical and horizontal directions during expansion and expansion. A predetermined expansion completion shape can be stably secured.

  Further, in the front seat airbag device 60 of the first embodiment, the vertical tether 82 has a configuration in which at least two of the first vertical tether 83 and the second vertical tether 84 that are displaced forward and backward are disposed. As shown in FIG. 6, the first vertical tether 83 and the second vertical tether 84 in the second row shorten the front row side so that the connecting distances CL1 and CL2 in the vertical direction are CL1 <CL2. And the first lateral tether 87 of the lateral tether 86 is disposed therebetween.

  Therefore, in 1st Embodiment, the shape of the bag main-body part 70 which increases thickness dimension gradually toward the back side can be ensured easily, suppressing the swelling in the left-right direction.

  Furthermore, in the front seat airbag device 60 of the first embodiment, the front end 71 of the bag body 70 has the first vertical tether 83 on the front side in the front-rear direction area of the connection portion with the gas inflow portion 62. The first lateral tether 87 is disposed on the rear side.

  Therefore, in the first embodiment, the front end portion 71 of the bag main body portion 70 communicated with the gas inflow portion 62 in the front seat airbag 61 is not the horizontal tether 86 but the vertical tether 82 (first vertical tether 83). Since it arrange | positions in the forefront row, the expansion | swelling shape which increases gradually the thickness dimension which went to back from the front edge 71a side can be ensured easily.

  Furthermore, in the front seat airbag device 60 of the first embodiment, the bag main body 70 has a plurality of, that is, the first vertical tethers 83, by shifting the vertical tether 82 and the horizontal tether 86 in the front-rear direction. A plurality of second vertical tethers 84, first horizontal tethers 87, second horizontal tethers 88, third horizontal tethers 89, and fourth horizontal tethers 90, and one of the horizontal tethers 86 in the last row. A fourth horizontal tether 90 is provided and configured.

  Therefore, the bag main body portion 70 of the front seat airbag 61 can stabilize the width dimension in the left-right direction when deployment is completed, and the driver seat airbag 21 is adjacent to the left and right of the front seat airbag 61. When the passenger seat airbag 31 is disposed, interference with the airbags 21 and 31 can be suppressed.

  Furthermore, in the front seat airbag device 60 of the first embodiment, the bag body portion 70 of the front seat airbag 61 extends from the front side to the rear side on the right side of the driver seat airbag 21 when the inflation is completed. As a configuration in which the driver seat airbag 21 is deployed and inflated, the driver seat side recess 92 having a support surface 93 capable of supporting the front surface 21a side and the side 21b side approaching the front seat airbag 61 is completely inflated. It is arranged from the rear end 70a to the side surface 70b (see FIGS. 9 and 10).

  Therefore, in the first embodiment, the bag main body portion 70 of the front seat airbag 61 at the completion of the inflation can support the front surface 21a side and the side 21b side of the driver seat airbag 21. Even if the bag 21 moves so as to approach the front seat airbag 61, it is supported by the front seat airbag 61 and can be prevented from moving, and the driver DM can be received with good cushioning properties. On the contrary, even if the front seat airbag 61 receives the front passenger occupant PM as the front seat occupant M moving forward in the diagonally left front direction and moves to the driver seat airbag 21 side, Since it is supported by the bag 21 and further supported by the ring portion 11 of the steering wheel 9 to prevent movement, the passenger seat passenger PM as the front seat occupant M can be received with good cushioning properties. Further, even if the driver DM moves forward between the driver seat airbag 21 and the front seat airbag 61 and moves diagonally right forward away from the driver seat airbag 21, The airbag 61 includes a front support portion 93a of a support surface 93 extending toward the front surface 21a of the driver seat airbag 21, and the front support portion 93a of the support surface 93 causes the driver seat airbag 21 side. The driver DM that has passed through the direction 21b can be accurately received.

  Furthermore, in the front seat airbag device 60 of the first embodiment, as shown in FIGS. 3 and 4, the driver seat side recess 92 connects the wall portions 76 and 77 facing each other in the left-right direction of the bag body 70. The third horizontal tether 89 is provided.

  Therefore, in the first embodiment, the driver's seat side recess 92 can be easily provided in the front seat airbag 61 using the third lateral tether 89.

  Furthermore, in the front seat airbag device 60 of the first embodiment, as shown in FIGS. 9, 10, 16, and 17, the front seat airbag 61 is used for the front passenger seat when the bag body portion 70 is completely inflated. The configuration is such that the airbag 31 is deployed and inflated on the left side, and the gas inflow portion 62 is disposed toward the outer mounting seat 52 side of the case 50 as a storage portion of the passenger seat airbag 31. Further, the front seat airbag 61 shares the storage portion of the front seat airbag 61 and the storage portion of the passenger airbag 31 as one case 50, and the mounting portion 65 of the front seat airbag 61 The configuration is such that the attachment portion 35 of the passenger seat airbag 31 to the case 50 is disposed adjacently in the left-right direction.

  Therefore, in the first embodiment, the storage part of the front seat airbag 61 can be shared by the storage part of the passenger seat airbag 31 and the single case 50, and the passenger seat side portion 4 of the instrument panel 1 in front of the front seat. The space inside can be used effectively. Of course, the front seat airbag 61 has a planar bag structure in which the gas inflow portion 62 attached and fixed to the case 50 can be expanded by suppressing the thickness in the vertical direction. Even if the front end 31d of the seat airbag 31 is inflated by increasing the thickness dimension in the left-right direction and the up-down direction, the gas inflow portion 62 does not hinder the expansion form of the passenger seat airbag 31. It can be inflated while maintaining a smooth inflow state of the inflation gas G to the bag body 70 side.

  Furthermore, in the first embodiment, the front seat airbag 61 has the connecting tethers 98 and 99 that connect the bag main body portion 70 and the passenger seat airbag 31 at the time of completion of the inflation in at least two positions shifted vertically. Are arranged.

  Therefore, in the first embodiment, the connecting tethers 98 and 99 allow the front seat airbag 61 and the passenger seat airbag 31 to both expand and inflate from the case 50 without being separated from each other. The front seat occupant M of the seat occupant PM and the driver DM can be accurately received.

  Furthermore, in the first embodiment, the front seat airbag 61 is a recess between the rear end 70a side of the bag body 70 when the inflation is completed and the rear end 31a side of the passenger seat airbag 31 when the inflation is completed. A cover cloth 101 (connecting tether 99) that connects the bag main body 70 and the passenger seat airbag 31 is disposed so as to cover the rear of 102.

  Therefore, in the first embodiment, even if the passenger occupant PM of the front seat occupant M attempts to enter between the front seat airbag 61 and the passenger seat airbag 31 when the inflation is completed, the cover cloth 101 is used. Thus, the passenger seat passenger PM can be received with good cushioning properties.

  Furthermore, in the first embodiment, the front seat airbag 61 has an outer edge 70d side away from the passenger seat airbag 31 on the lower surface 70c side of the bag body 70 when the inflation is completed, and a passenger seat when the inflation is completed. A lower connecting cloth 103 that connects the inner edge 31c side on the bag body 70 side on the lower surface 31b side of the airbag 31 is disposed.

  Therefore, in the first embodiment, the separation side wall 77 on the side away from the passenger seat airbag 31 in the front seat airbag 61 is restrained from being separated from the passenger seat airbag 31, and the front seat airbag 61 is in the middle of deployment. The bag main body portion 70 of the seat airbag 61 is configured to straighten the main body inflating portion 72 that extends rearward from the front end portion 71 while the left and right blurring is suppressed by the passenger seat airbag 31 itself and the lower connecting cloth 103. It can be stably expanded and expanded toward the rear side.

  Furthermore, in the first embodiment, the vent hole 79 for exhausting the inflation gas G of the front seat airbag 61 is a separation that is a lateral side surface on the side away from the passenger seat airbag 31 when the inflation is completed. It is the side wall part 77, Comprising: It arrange | positions in the front side of the airbag 21 for driver's seats.

  Therefore, in the first embodiment, even if the front seat airbag 61 is inflated in the state of being in close proximity to the passenger seat airbag 31 sharing the case 50 as a storage part, the passenger seat airbag 31 is blocked. Therefore, the excess inflation gas G can be smoothly exhausted from the vent hole 79. Of course, the vent hole 79 can smoothly exhaust the excess inflation gas G without being blocked by the driver's seat airbag 21.

  As shown in FIGS. 15 and 16, the passenger seat airbag 31 is also provided with a vent hole 33 a on a side surface away from the front seat airbag 61, so that the front seat airbag 61 is closed. The excess inflation gas G can be smoothly exhausted from the vent hole 33a without escaping.

  Further, in the front seat airbag device 60 of the first embodiment, the bag body 70 is configured as a bag from a plurality of airbag fabrics 110 as shown in FIGS. The ceiling wall portion 66 and the bottom wall portion 63 of the inflow portion 62 extend from the inflow side base fabric 114 and the lower base fabric 112 as separate bag base fabrics among the plurality of airbag base fabrics 110. Installed and configured.

  Therefore, in the first embodiment, the ceiling wall portion 66 and the bottom wall portion 63 of the gas inflow portion 62 include the inflow side base fabric 114 and the lower side of the airbag base fabric 110 that forms the bag body portion 70 in a bag shape. Since it is formed extending from the base fabric 112, it is not necessary to use as much as possible a connecting means such as sewing at the connecting portion between the gas inflow portion 62 and the bag main body portion 70, thereby ensuring gas sealing performance. Thus, the connection state between the gas inflow portion 62 and the bag main body portion 70 can be secured.

  In particular, in the first embodiment, the airbag base fabric 110 constituting the bag main body portion 70 is disposed on the lower surface side with the upper base fabric 111 constituting the upper side wall portion 75 disposed on the upper surface side of the inflated shape. The lower base fabric 112 constituting the lower side wall portion 74, the inflow side base fabric 114 constituting the inflow side wall portion 76 on the side connected to the gas inflow portion 62 on the lateral side surface, and the gas inflow on the lateral side surface The separation side base cloth 116 constituting the separation side wall part 77 away from the part 62 and the rear side base cloth 117 constituting the rear side rear wall part 78 are configured. The inflow side base fabric 114 includes a ceiling side portion 115 constituting the ceiling wall portion 66 of the gas inflow portion 62, and the lower base fabric 112 constitutes a bottom side portion constituting the bottom wall portion 63 of the gas inflow portion 62. 113 is comprised.

  Therefore, in the first embodiment, the bag main body portion 70 is formed of an upper side wall portion 75, a lower side wall portion 74, an inflow side wall portion 76, and a separation side wall portion 77. It can be configured in a substantially square column shape. For this reason, the bag body 70 has a shape in which the vertical thickness dimension (interval) between the upper side wall 75 and the lower side wall 74 is gradually increased toward the rear side, and the left and right inflow side walls 76 and the separation side wall 77 are separated. Furthermore, it can be easily secured by providing a vertical tether 82 or the like for connecting the upper side wall portion 75 and the lower side wall portion 74 as appropriate. Further, the ceiling side portion 115 of the ceiling wall portion 66 that constitutes the gas inflow portion 62 extends from the inflow side base fabric 114 that forms the inflow side wall portion 76, and the bottom of the bottom wall portion 63 that constitutes the gas inflow portion 62. The side portion 113 is configured to extend from the lower base fabric 112 that forms the lower side wall portion 74, and the inflow side wall portion 76 of the bag main body portion 70 and the ceiling wall portion 66 of the gas inflow portion 62 are integrated with each other. The bottom wall portion 74 of the bag main body 70 and the bottom wall portion 63 of the gas inflow portion 62 are formed from the continuous bottom base fabric 112. Therefore, even if the gas inflow portion 62 is configured to communicate with the right side of the bag main body portion 70, the ceiling wall portion 66 and the bottom wall portion 63 of the gas inflow portion 62 respectively flow into the bag main body portion 70. For the side wall portion 76 and the lower side wall portion 74, a coupling means such as sewing is provided. Without use, and is configured to be connected by continuous, easily to ensure the gas sealing property, it is possible to connect the gas inlet portion 62 and the bag body portion 70.

  In the first embodiment, the outer peripheral wall of the front seat airbag 61 is composed of five airbag base fabrics 110 (111, 112, 114, 116, 117). A part or the whole is extended from one or two of the upper base fabric 111, the lower base fabric 112, the inflow side base fabric 114, the separation side base fabric 116, etc. The outer peripheral wall of the front seat airbag may be formed from the base fabric. Alternatively, in the case of a configuration in which the driver's seat side recess is small or the driver's seat side recess is not provided, the lower base fabric, the rear base fabric, and the upper base fabric are configured from one sheet, and the other inflow You may comprise the outer peripheral wall of the airbag for front seats from the base fabric for 3 airbags combined with the side base fabric or the separation side base fabric.

  However, in the case of a five-sheet airbag base fabric as in the embodiment, a driver seat side recess that is greatly recessed, in other words, a front support portion 93a having a large lateral width is secured. And the three-dimensional bag main-body part 70 which provides the vertical tether 82 and the horizontal tether 86 and increases gradually to the back side can be formed easily.

  When two upper and lower connecting tethers that are connected to the passenger airbag 31 are provided, the front seat airbag 61A of the front seat airbag device 60A according to the second embodiment shown in FIGS. May be. In the front seat airbag 61A, the upper and lower connecting tethers 98A and 99A are arranged so as to be shifted vertically by reducing the length in the vertical direction. The cover cloth 101A that closes the recess 102 between the passenger seat airbag 31 and the front seat airbag 61A may not be provided, but covers the back of the connecting tethers 98A and 99A as shown by the two-dot chain line. In addition, the length in the vertical direction may be increased. Considering this cover cloth 101A as a connection tether, in the second embodiment, a total of three connection tethers 98A, 99A, 101A are arranged, and three or more connection tethers may be arranged.

  Further, in the first embodiment, the front seat airbag 61 provided with the driver seat side recess 92 is illustrated, but the front seat airbag 60B of the front seat airbag apparatus 60B of the third embodiment shown in FIGS. Like the bag 61B, you may comprise without providing a driver's seat side recessed part.

  Note that the front seat airbag 61B has a configuration in which the driver's seat side recess is not provided as compared with the front seat airbag 61 of the first embodiment. Is formed of three first lateral tethers 87B, second lateral tethers 88B, and fourth lateral tethers 90B that are displaced in the front-rear direction, and does not include a third lateral tether 89 for providing a driver seat side recess 92. It is configured. As in the first embodiment, the vertical tether 82B includes a first vertical tether 83B and a second vertical tether 84B that are displaced forward and backward.

  Further, as the airbag base fabric 110B, the bottom wall of the upper base fabric 111B forming the upper side wall portion 75, the lower side wall portion 74 and the gas inflow portion 62 so as to narrow the width dimension of the airbag 61B in the left-right direction. A lower base fabric 112B having a bottom side portion 113 forming a portion 63, an inflow side base fabric 114B having a ceiling side portion 115 forming an inflow side wall portion 76 and a ceiling wall portion 66 of a gas inflow portion 62; It is composed of a separation-side base fabric 116B that forms the separation-side wall portion 77 and a rear-side base fabric 117B that forms the rear-side wall portion 78.

  Further, in the front seat airbag device 60 according to the first embodiment, the case where the front seat airbag 61 and the passenger seat airbag 31 are disposed in common has been described. It may be configured to be housed in the driver seat side portion 3 of the instrument panel 1 in front of the driver seat 13 like a front seat airbag device 60C of the fourth embodiment shown in FIG.

  The front seat airbag 61C of the front seat airbag device 60C uses a retainer 41 (not shown) with respect to a mounting seat 53C of a case 50C as a storage part, together with an inflator 45C and a mounting portion of a gas inflow portion 62C. 65 is fixedly attached. And the front-end part 71 of the bag main-body part 70C continues on the right side of the gas inflow part 62C. The bag main body 70C has a front end 71 that gradually increases in thickness in the vertical direction toward the rear and continues to the rear main body inflatable portion 72. The main body inflatable portion 72 is located on the rear surface side of the vehicle V. The front seat occupant M heading toward the center in the left-right direction, that is, the driver DM moving forward in the diagonally forward right direction or the passenger seat passenger PM moving forward in the diagonally forward left direction can be received. Of course, even if the front seat occupant M seated in the central seat 17 between the driver's seat 13 and the passenger seat 16 moves forward, the airbag 61C can accurately receive it.

  In the front seat airbag 61C, the gas inflow portion 62C is inflated as a planar bag structure in which the outer peripheral edges of the bottom wall portion 63 having the attachment portion 65 and the ceiling wall portion 66 are joined (sewn). It is comprised so that the thickness dimension of the up-down direction at the time of completion may be suppressed. Further, when the inflation is completed, the front end 71 of the bag body 70C is communicated with the right side of the gas inflow portion 62C, and the body inflation 72 is linearly inflated rearward with respect to the front end 71, and from above. As seen, the front seat airbag 61C is disposed in an L shape.

  Therefore, even in the front seat airbag device 60C of the fourth embodiment, during operation, the front seat airbag 61C suppresses interference with surrounding members in the vicinity of the case 50C as a storage part, and the driver seat Between the airbag 21 for the passenger and the airbag 31 for the passenger seat, it can be deployed and inflated in an L-shape from the portion of the case 50C as the storage portion as viewed from above. In the front seat airbag device 60C, the bag main body portion 70C of the front seat airbag 61C is deployed and inflated toward the rear side in the front-rear direction from the front end portion 71 side to the main body inflating portion 72 side. Therefore, the front seat occupant M including the front seat driver DM and the front passenger occupant PM strikes the front seat airbag 61C, which has been inflated, obliquely toward the right front side. Even if, on the contrary, the vehicle is in a state where it strikes diagonally to the left front direction, it is possible to satisfactorily receive the front seat occupant M without degrading the performance. Of course, even if the front seat occupant M seated in the central seat 17 moves forward, the airbag 61C can accurately receive the airbag 61C.

  Further, like the front seat airbag device 60D of the fifth embodiment shown in FIGS. 28 and 29, it is mounted on the passenger seat side portion 4 of the instrument panel 1 in front of the passenger seat 16 and is used as a passenger seat airbag device. It is good also as a structure used.

  In other words, the front seat airbag 61D of the front seat airbag device 60D uses the retainer 41 (not shown) with respect to the mounting seat 53D of the case 50D as a storage part, together with the inflator 45C and the gas inflow portion 62D. The attachment portion 65 is fixedly attached. And the front-end part 71 of bag main-body part 70D continues in the left side of gas inflow part 62D. The bag main body portion 70D has a front end portion 71 that gradually increases in thickness in the vertical direction toward the rear and continues to the rear main body inflating portion 72. The main body inflating portion 72 moves forward on the rear surface side. The passenger seat passenger PM to be received is configured to be received.

  Also in the front seat airbag 61D, the gas inflow portion 62D has a planar bag structure in which the outer peripheral edges of the bottom wall portion 63 having the attachment portion 65 and the ceiling wall portion 66 are joined (sewn), and when the inflation is completed. It is comprised so that the thickness dimension of the up-down direction may be suppressed. Further, when the expansion is completed, the front end 71 of the bag body 70D is communicated with the left side of the gas inflow portion 62D, and the body expansion 72 is linearly expanded rearward with respect to the front end 71 as viewed from above. As seen, the front seat airbag 61D is arranged in an L shape.

  Therefore, even in the front seat airbag device 60D of the fifth embodiment, during operation, the front seat airbag 61D suppresses interference with surrounding members in the vicinity of the case 50D as a storage part, and the passenger seat 16 can be expanded and inflated in an L shape from the portion of the case 50C as a storage portion as viewed from above. In the front seat airbag device 60D, the bag main body portion 70D of the front seat airbag 61D is deployed and inflated toward the rear side along the front-rear direction from the front end portion 71 side to the main body inflating portion 72 side. Therefore, it is possible to satisfactorily receive the passenger seat passenger PM moving forward.

  Further, in the case where the driver's seat side concave portion for storing the driver's seat airbag is provided in the front seat airbag, the front seat airbag of the front seat airbag device 60E of the sixth embodiment shown in FIGS. Like 61E, a raised portion 95 that contacts or approaches the lower portion 21c side of the airbag 21 for the driver's seat 21 that has been inflated on the lower portion 70e side on the driver's seat 13 side on the rear end 70a side of the bag body portion 70E. You may arrange | position so that it may protrude.

  The front seat airbag 61E is different from the first embodiment only in that a raised portion 95 is provided on the driver seat airbag 21 side of the rear end 70a of the bag body 70E. This is the same as the front seat airbag 61 and has the same effects.

  And in this 6th Embodiment, the protruding part 95 which contacts or approaches the lower part 21c side of the airbag 21 for driver seats is arrange | positioned by the lower part 70e side of the rear end 70a side of the bag main-body part 70. Thus, the driver DM wearing the seat belt BD moves between the driver's seat airbag 21 and the front seat airbag 61E in a bent state, and obliquely below the driver's seat airbag 21. Even if it tries to come off, the raised portion 95 of the front seat airbag 61E can accurately receive the upper body UB including the head H, shoulder S, arm A, or waist W of the driver DM. .

  Note that, in the front seat airbag 61E of the sixth embodiment, the passenger seat airbag 31 is also disposed on the passenger seat airbag 31 side of the lower portion of the cover cloth 101 as shown by the two-dot chain line. A raised portion 96 that contacts or approaches the end lower portion 31ab may be provided. With such a configuration, the passenger occupant PM wearing the seat belt BP moves between the passenger seat airbag 31 and the front seat airbag 61E in a forward bent state, and the cover cloth Even when trying to enter the lower side of 101, the raised portion 96 of the airbag 61E for the front seat is the upper body UB including the head H, shoulder S, arm A, or waist W of the passenger occupant PM. Can be taken accurately.

  Incidentally, when the raised portion 96 is provided, the cover cloth 101 may be omitted.

  Further, in the case of providing a connecting tether for connecting the front seat airbag and the passenger seat airbag, like the front seat airbag 61F of the front seat airbag device 60F of the seventh embodiment shown in FIGS. You may comprise. In the front seat airbag 61F, an edge 70h on the front passenger seat airbag 31 side on the upper surface 70g of the bag main body 70 when the inflation is completed, and a front seat seat on the upper surface 31g of the passenger seat airbag 31 when the inflation is completed. The connection tether 100 is disposed so as to connect the edge 31h on the airbag 61F side. Similarly to the lower connection cloth 103, the connection tether 100 is disposed in the vicinity of the middle in the front-rear direction of a portion of the airbag 61F, 31 at the time of completion of inflation that is separated from the rear surfaces 2a, 4a of the instrument panel 1. The connection tether 100 is formed by connecting a pair of cloth pieces 100a connected to the airbags 61F and 31 respectively. The front seat airbag device 60F is different from the airbag 61A of the second embodiment only in that the connecting tether 100 is provided in the front seat airbag 61F. The configuration is the same as that of the front seat airbag device 60A of the embodiment.

  And also in this 7th Embodiment, the front-seat airbag 61F and the passenger-seat airbag 31 that are in the middle of deployment and expansion are further improved by the connecting tether 100 that connects the upper surfaces 61g and 31g of the airbags 61F and 31 to each other. Further, it is possible to ensure a state of expanding and inflating from the case 50 without being separated from each other, and the front seat occupant M of the passenger seat passenger PM and the driver DM can be accurately received.

  In the front seat occupant protection device FAB including the front seat airbag device 60 and the passenger seat airbag device 30 according to the first embodiment, the passenger seat airbag 31 is connected to the left and right side wall parts (left Horizontal tethers 36 and 36 (see FIG. 15) are arranged to connect the wall portion 33b and the right wall portion 33c) and restrict the width dimension in the left-right direction.

  Therefore, in this front seat occupant protection device FAB, the width dimension in the left-right direction is regulated by the lateral tether 36 disposed inside the passenger seat airbag 31 during the inflation or when the inflation is completed. Protruding to the bag 61 side is suppressed. Therefore, interference of the front passenger airbag 31 with the front airbag 61 is suppressed, and a reaction force is received when the front airbag 61 is shaken in the left-right direction or with the front airbag 61. The front-seat airbag 61 and the passenger-seat airbag 31 can be smoothly inflated and inflated rearward, and the inflation can be completed by suppressing the lateral blur of the passenger-seat airbag 31 itself. It becomes possible.

  And when providing a horizontal tether in a passenger's seat airbag, you may comprise like front seat occupant protection device FAB1 shown in FIG. The front seat occupant protection device FAB1 shown in FIG. 35 is configured such that the front seat airbag 61G of the front seat airbag device 60G according to the eighth embodiment has the wall portions 76 and 77 that face each other in the left-right direction when the inflation is completed. A plurality of lateral tethers 86 to be connected are disposed so as to be shifted forward and backward. Then, the lateral tether 37 of the passenger seat airbag 31G of the passenger seat airbag device 30 is disposed so as to be displaced forward and backward in the front seat airbag 61G when the passenger seat airbag 31G is completely inflated. It arrange | positions so that it may arrange | position to the side (right side) between the horizontal tethers 88 and 89 which are.

  In the front seat airbag 61G, the lateral tether 86 that connects the wall portions 76 and 77 facing each other in the left-right direction when the inflation is completed is shifted in the front-rear direction as in the first embodiment. , Comprising four arranged along the left-right direction. That is, the four horizontal tethers 86 are arranged as a first horizontal tether 87, a second horizontal tether 88, a third horizontal tether 89, and a fourth horizontal tether 90 in order from the front row side.

  When the front seat airbag 61G is completely inflated, the vertical tether 82G that connects the wall portions 74 and 75 facing each other in the vertical direction is formed as a strip having a width direction in the left-right direction. The first vertical tether 83, the second vertical tether 84, and the third vertical tether 85 are provided. The first vertical tether 83 in the foremost row is disposed with a lower vertical connection distance between the lower wall portion 74 and the upper wall portion 75 than the second vertical tether 84 in the second row. The first vertical tether 83 is disposed in front of the first horizontal tether 87, and the second vertical tether 84 is disposed between the first horizontal tether 87 and the second horizontal tether 88, and the third vertical tether 85. Is disposed between the second lateral tether 88 and the third lateral tether 89.

  As described above, in the passenger seat airbag 31G, the lateral tether 37 is placed between the second lateral tether 88 and the third lateral tether 89 of the front seat airbag 61G in a state when the inflation is completed. On the side. In the passenger seat airbag 31G, a lateral tether 38 coupled to the left wall portion 33b and the right wall portion 33c facing each other in the left-right direction is disposed on the front side of the lateral tether 37. The lateral tether 38 is also disposed on the right side between the first lateral tether 87 and the second lateral tether 88.

  These tethers 37, 38 are also formed by joining the cloth pieces 37a, 38a, 85a coupled to the opposing wall portions, including the third vertical tether 85.

  Further, the front seat airbag 61G is different from the front seat airbag 61 of the first embodiment in that the front seat airbag 61G includes a third vertical tether 85, and other configurations are the same as those of the first embodiment. This is the same as the seat airbag 61. The passenger seat airbag 31G has a front seat occupant according to the first embodiment in that the mounting portion 35 has a narrow width in the left-right direction and the lateral tether 38 is disposed forward. It is only different from the passenger seat airbag 31 of the protection device FAB, and the other configuration is substantially the same as the passenger seat airbag 31 of the front seat occupant protection device FAB of the first embodiment.

  In the front seat occupant protection device FAB1 having such a configuration, a part between the front and rear horizontal tethers 87 and 88 and a part between the horizontal tethers 88 and 89 in the front seat airbag 61G are in the middle of the inflation or at the completion of the inflation. Even if the passenger seat airbag 31G protrudes toward the passenger seat airbag 31G, the lateral tethers 37 and 38 are disposed at the position of the passenger seat airbag 31G. Interference with the airbag 31G can be suppressed. Of course, since the front seat airbag 61G is provided with a plurality of lateral tethers 86 (87, 88, 89, 90) that are displaced forward and backward, the passenger seat airbag 31G of the front seat airbag 61G. The protrusion to the side can be suppressed over a long range in the front-rear direction. Therefore, the front seat airbag 31G is restrained from blurring in the left-right direction of the passenger seat airbag 31G and in the left-right direction of the front seat airbag 61G that receives a reaction force upon interference with the passenger seat airbag 31G. The bag 61G and the passenger seat airbag 31G can be expanded and inflated more smoothly to the rear side to complete the expansion.

  In the example shown in the figure, the passenger side airbag 31G is provided with the two lateral tethers 37, 38, but the rear lateral tether 37 may be provided. Of course, the passenger seat airbag 31 shown in FIG.

  Also in the passenger seat airbag 31 of the front seat occupant protection device FAB of the first embodiment, the two lateral tethers 36 are shifted to the front and rear of the front seat airbag 61 in the state when the inflation is completed. , 87, a portion between the horizontal tethers 87, 88, or a side (right side) of the portion between the horizontal tethers 89, 90.

13 ... (front seat) driver seat, 16 ... (front seat) front passenger seat, 17 ... (front seat) center seat,
21 ... Driver's seat airbag, 21a ... (front seat airbag side) front, 21b ... (front seat airbag side) side, 21c ... lower part,
31, 31G ... Passenger's seat airbag, 31a ... rear end, 31b ... lower surface, 31c ... (left edge) inner edge, 31d ... front end, 31e ... lower surface, 31f ... left surface, 33b ... left wall portion, 33c ... right wall portion , 36, 37, 38 ... horizontal tether,
50, 50C, 50D ... (storage part) case,
60, 60A, 60B, 60C, 60D, 60E, 60F, 60G ... front seat airbag device, 61, 61A, 61B, 61C, 61D, 61E, 61F, 61G ... front seat airbag, 62, 62C, 62D ... Gas inflow part, 62a ... Front edge, 63 ... Bottom wall part, 64 ... Inflow opening, 65 ... Mounting part, 66 ... Ceiling wall part, 70, 70C, 70D, 70E ... Bag body part,
70a ... rear end, 70b ... (driver's airbag side) side surface, 70c ... lower surface, 70d ... (right edge) outer edge, 70e ... lower part,
71 ... front end part, 71a ... front edge, 71b ... (left edge) outer edge, 72 ... main body expansion part,
74 ... lower side wall part, 75 ... upper side wall part, 76 ... inflow side wall part, 77 ... separated side wall part,
78 ... rear side wall, 79 ... vent hole,
80 ... Outer edge side tether, 82, 82B, 82G ... Vertical tether, 83, 83B ... First vertical tether, 84, 84B ... Second vertical tether, 85 ... Third vertical tether, 86, 86B ... Horizontal tether, 87, 87B ... 1st horizontal tether, 88, 88B ... 2nd horizontal tether, 89 ... 3rd horizontal tether, 90, 90B ... 4th horizontal tether,
92 ... Driver seat side recess, 93 ... Support surface, 95 ... (Driver seat side) raised portion,
98, 98A ... connection tether, 99, 99A ... connection tether, 101, 101A ... cover cloth, 102 ... recess (between airbags 31, 61), 103 ... lower connection cloth,
110, 110B ... Airbag base fabric, 111, 111B ... Upper base fabric, 112, 112B ... Lower base fabric, 113 ... Bottom side portion, 114, 114B ... Inflow side base fabric, 115 ... Ceiling side portion, 116, 116B: Remote base fabric, 117, 117B: Rear base fabric,
CL1 ... connection distance (for the first vertical tether), CL2 ... connection distance (for the second vertical tether),
V ... Vehicle, M ... Front seat occupant, DM ... Driver, PM ... Passenger seat passenger, FAB, FAB1 ... Front seat occupant protection device.

Claims (18)

A front seat airbag device is configured such that a front seat airbag folded and stored in a storage portion in front of a front seat of a vehicle is deployed and inflated rearward from the storage portion when inflating gas flows.
The front seat airbag is
A gas inflow portion that is fixedly attached to the storage portion and allows an inflating gas to flow; and
A bag main body extending from the front end to the rear side by connecting a front end to one side in the left-right direction of the gas inflow portion;
With
The gas inflow part is
Except for the connection side to the front end of the bag main body, the outer peripheral edges of the top wall and the bottom wall on the lower surface side, which have substantially the same outer shape, are coupled to each other. An inflow opening that opens to allow the inflation gas to flow into the bottom wall portion is configured, and the periphery of the inflow opening is configured as an attachment portion to the storage site,
The front end portion of the bag main body portion is inflated so that the front edge side is connected to the front edge of the gas inflow portion and the thickness dimension from the front edge side toward the rear is gradually increased. An airbag device for a front seat, wherein the airbag device is configured so as to be connected to a portion.   The front seat airbag extends from an outer edge separated in the left-right direction from the gas inflow portion at the front end portion of the bag main body, and is fastened together when the mounting portion is fixed to the storage portion. The front seat airbag device according to claim 1, comprising an outer edge side tether fixed to the front seat.   The bag main body is configured such that a vertical tether that connects walls facing each other in the up-down direction and a horizontal tether that connects walls facing each other in the left-right direction when the inflation is completed are arranged inside the bag body. The airbag device for a front seat according to claim 1 or 2, characterized by the above. As the configuration in which a plurality of the vertical tethers are disposed at least in the front-rear direction,
The vertical tether in the front row and the vertical tether in the second row are arranged with the vertical connection distance shortened on the front row side, and the horizontal tether placed between them. The airbag device for a front seat according to claim 3, wherein the airbag device is a front seat airbag device.   The front end portion of the bag main body portion is configured by disposing the vertical tether on the front side and the lateral tether on the rear side in an area in the front-rear direction of the connection portion with the gas inflow portion. The front seat airbag device according to claim 3 or 4, wherein the front seat airbag device is provided.   The bag body is configured by shifting the vertical tether and the horizontal tether in the front-rear direction, respectively, and arranging a plurality of the horizontal tethers in the last row. The front seat airbag device according to any one of claims 3 to 5, wherein the airbag device is a front seat airbag device. The bag body portion of the front seat airbag is,
With a configuration that expands and inflates from the front side to the rear side on the side of the driver airbag at the time of completion of the inflation,
A driver seat side recess having a support surface capable of supporting a front side and a side side approaching the front seat airbag in the driver seat airbag is disposed from a rear end to a side surface when inflation is completed. The airbag device for a front seat according to claim 1, wherein the airbag device is configured.   8. The front seat airbag device according to claim 7, wherein the driver seat side recess is formed by providing a lateral tether that connects walls facing each other in the left-right direction of the bag body. .   The raised portion that contacts or approaches the lower side of the airbag for a driver's seat is disposed on the lower side of the rear end side of the bag main body. Front seat airbag device. The front seat airbag is
The bag main body portion is configured to be deployed and inflated on the side of the passenger seat airbag when inflation is completed, and the gas inflow portion is disposed toward the storage portion side of the passenger seat airbag. further,
The storage part of the front seat airbag and the storage part of the passenger seat airbag are shared, and the attachment part of the front seat airbag and the attachment part of the passenger seat airbag to the storage part The front seat airbag device according to claim 1, wherein the front seat airbag device is disposed adjacent to each other in the left-right direction.   In the front seat airbag, connecting tethers that connect the bag main body portion and the passenger seat airbag when inflation is completed are arranged in at least two positions shifted vertically. The front seat airbag device according to claim 10.   The front bag airbag is configured to cover a rear portion of a recess between a rear end side of the bag main body when the inflation is completed and a rear end side of the passenger seat airbag when the inflation is completed. The front seat airbag device according to claim 10 or 11, wherein a cover cloth for connecting a portion and the passenger seat airbag is disposed.   The front seat airbag has an outer edge side away from the passenger seat airbag on the lower surface side of the bag body portion when the inflation is completed, and the bag body on the lower surface side of the passenger seat airbag when the inflation is completed. The front seat airbag device according to any one of claims 10 to 12, wherein a lower connecting cloth for connecting the inner edge side on the part side is disposed. The front seat airbag includes a vent hole for exhausting inflation gas;
The said vent hole is arrange | positioned in the side surface of the left-right direction of the side away from the said airbag for passenger seats at the time of completion of inflation, The any one of Claim 10 thru | or 13 characterized by the above-mentioned. Front seat airbag device. The bag body is configured in a bag shape from a plurality of bag base fabrics,
The ceiling wall portion and the bottom wall portion of the gas inflow portion are configured to extend from separate bag base fabrics among the plurality of bag base fabrics. The front seat airbag device according to any one of claims 1 to 14. The airbag base fabric constituting the bag main body part,
An upper base fabric constituting an upper side wall portion disposed on the upper surface side of the expansion completed shape;
A lower base fabric constituting a lower wall portion disposed on the lower surface side;
An inflow side base fabric constituting an inflow side wall portion on the side continuous with the gas inflow portion on the side surface in the left-right direction;
A separation side base fabric constituting a separation side wall portion away from the gas inflow portion on the side surface in the lateral direction;
A rear base fabric constituting the rear side wall portion of the rear surface side;
It consists of 5 pieces of
The inflow side base fabric includes a ceiling side portion constituting a ceiling wall portion of the gas inflow portion,
16. The front seat airbag device according to claim 15, wherein the lower base fabric includes a bottom side portion that constitutes a bottom wall portion of the gas inflow portion. 15. The front seat airbag device having the front seat airbag according to any one of claims 10 to 14, and a passenger seat airbag device having the passenger seat airbag. A front seat occupant protection device,
The front-seat occupant protection device is characterized in that the passenger-seat airbag includes a lateral tether that connects walls facing each other in the left-right direction when inflation is completed. The front seat airbag has a plurality of lateral tethers that connect the wall portions facing each other in the left-right direction at the time of completion of the inflation, shifted in the front-rear direction,
The lateral tether of the passenger seat airbag is disposed laterally between the lateral tethers, which are arranged to be displaced forward and backward in the front seat airbag when the passenger seat airbag is completely inflated. The front-seat occupant protection device according to claim 17, wherein the front-seat occupant protection device is disposed so as to be disposed at the front.

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