JP2014054955A - Air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air bag device which has a simple structure, and which can appropriately protect a remote side occupant by an expanded air bag.SOLUTION: An air bag device is mounted on a vehicle in which a plurality of seats are arranged in parallel. The air bag device is configured to be capable of protecting a remote side occupant seated at a remote side seat DS far from an impact force action side when the impact force is applied from one side in the direction of parallel arrangement of the seats. The air bag device includes an air bag 22 which is folded and stored in a backrest part 2 of the remote side seat. The air bag 22 comprises: an occupant protective part 23 which protrudes from a lateral face of the backrest part 2 in the impact force action side and inflates to cover the impact force action side of the remote side occupant; an attachment inflation part 28 which is arranged along a width direction of the backrest part 2 and attached to a seat frame 3 of the seat; and a communication curvature part 31 which is curved and arranged in the state that a curved tube shape is maintained to communicate between the occupant protective part 23 and the attachment inflation part 28.

Description

  The present invention is mounted on a vehicle configured by arranging a plurality of seats side by side and seated on a remote side seat far from the impact force acting side when an impact force is applied from one side of the seats in the juxtaposed direction. The present invention relates to an airbag device capable of protecting a side occupant.

  Conventionally, as an airbag device for protecting the occupant on the separation side, an airbag that is folded and stored in a backrest portion of a seat has been provided. By inflating, the side portion (side support portion) on the side of the impact force acting side in the backrest portion is bulged forward, and the side support portion bulged forward to the impact force acting side of the remote occupant There is one that prevents the movement of (see, for example, Patent Document 1).

  In addition, as an airbag device for protecting the occupant on the separated side, an airbag that is folded and housed in the backrest part of the detachable side seat is caused to inflate inflation gas into the interior during operation to The airbag is inflated so as to cover the force acting side, and when the airbag is deployed and inflated, the support plate housed in the backrest portion is extended, and the impact force acting side of the airbag that has been inflated is supported by the supporting plate. As a result, there is a thing that prevents the occupant on the separated side from moving to the impact force acting side. The support plate is connected by an airbag and a tether, and is configured to be extended in conjunction with the protrusion from the backrest portion of the airbag (for example, Patent Document 2).

JP 2010-76641 A JP 2011-178189 A

  However, in the airbag device described in Patent Document 1, the airbag is configured not to inflate so as to protrude from the backrest portion but to complete inflating in the backrest portion, and when the airbag is completely inflated, the airbag is inflated forward. Since it is configured to prevent the separation side occupant from moving to the impact force acting side only by the side support part that is protruding, during the operation, the impact force acting side of the separation side occupant is widely covered to accurately identify the separation side occupant There was room for improvement in terms of protection.

  Further, in the airbag device described in Patent Document 2, the impact force acting side of the separated occupant can be widely covered by the airbag that inflates so as to protrude from the backrest portion. Since a support plate separate from the bag is used, there is room for improvement in that the number of parts increases, the configuration is simplified, and the cost is reduced.

  The present invention solves the above-described problems, and an object of the present invention is to provide an airbag device that has a simple configuration and can accurately protect a occupant on the separated side with an inflated airbag.

An airbag device according to the present invention is mounted on a vehicle configured by arranging a plurality of seats side by side, and when an impact force is applied from one side of the seats in the side-by-side direction, the remote side is far from the impact force application side. An airbag device configured to protect an isolated occupant seated on a seat and including an airbag that is folded and stored in a backrest portion of the isolated seat,
Airbag
An occupant protection part that flows into the interior, protrudes from the side of the impact force acting side of the backrest, and expands to cover the impact force acting side of the separated occupant;
A mounting expansion part that is arranged so as to be substantially along the width direction of the backrest part, is attached to the seat frame of the seat, and inflates by inflating the inflation gas into the interior;
A communication bending portion that is bent and arranged in a state in which the bent cylinder shape is maintained so as to communicate the occupant protection portion and the mounting expansion portion,
It is characterized by comprising.

  In the airbag device of the present invention, the airbag is disposed so as to substantially extend in the width direction of the backrest portion and the occupant protection portion that covers the impact force acting side of the separated occupant by projecting from the backrest portion. And an inflating portion attached to the seat frame, and the occupant protection portion is communicated with the inflating portion by a communication bending portion. And this communication bending part is comprised so that it may be bent in the state which maintained the curved cylinder shape. That is, in the airbag device of the present invention, the airbag at the time of completion of inflation is arranged in a substantially L shape so that the occupant protection portion and the attachment inflation portion are substantially orthogonal to each other. Since the communication bending part which has connected the part is bent in the state which maintained the curved cylinder shape, it becomes a mode which has rigidity. Therefore, when the airbag is completely inflated, when the separated occupant is received by the occupant protecting portion, the communication bending portion connected to the mounting inflated portion attached to the seat frame is connected to the occupant protecting portion when the separated occupant is received. Due to this, a force that stretches the twisted or bent state acts, but the continuous bent part that expands to become a rigid body while maintaining the bent cylindrical shape does not deform against the twisted or elongated, The occupant protection part can be prevented from moving away from the backrest part along the impact force acting direction, and the remote occupant can be accurately received. As a result, in the airbag device of the present invention, the separated side occupant can be accurately received only by the airbag that has been inflated, so that the configuration can be simplified and the number of parts does not increase. Also, an increase in manufacturing cost can be suppressed.

  Therefore, in the airbag device of the present invention, the occupant on the separation side can be protected accurately with a simple configuration and with the inflated airbag.

  Further, in the airbag device of the present invention, the occupant protection portion includes an attachment piece portion that is attached to a portion on the side surface side of the seat frame, and is seated on the remote side seat rather than the attachment piece portion when the inflation is completed. If it is configured to have a protruding portion that protrudes in the direction toward the front of the separated occupant, the occupant protection portion is configured to be attached to the side portion of the seat frame by the mounting piece portion, so that the mounting expansion The lower end of the occupant protection part away from the part can be fixed to the side of the backrest part without making it a free end, and when the occupant protection part is received, Therefore, it is possible to further prevent the movement away from the backrest portion along the backrest portion, and it is possible to protect the remote occupant more accurately, which is preferable.

  Furthermore, in the airbag device having the above-described configuration, the airbag is provided with a separation-side inflation portion that communicates with the mounting inflation portion and that inflates so as to cover the separation side far from the impact force acting side of the separation-side occupant. With this configuration, it is possible to cover the remote side of the remote occupant with a single airbag, and even when the impact force is applied, the remote occupant may move toward the remote side. The separation-side occupant can be received by the separation-side expansion portion, which is preferable.

1 is a side view of a seat on which an airbag device according to an embodiment of the present invention is mounted. FIG. 2 is a partially enlarged plan view of the seat of FIG. 1. It is a partial expanded sectional view of the III-III site | part of FIG. FIG. 4 is a partial enlarged cross-sectional view of the IV-IV part in FIG. 2. FIG. 2 is a partially enlarged schematic cross-sectional view showing an inflator placement site in the seat of FIG. 1. It is a top view of the state where the air bag used for the air bag device of an embodiment was developed flat. In the airbag apparatus of embodiment, it is a side view which shows the state which the airbag completed inflation. In the airbag device of an embodiment, it is a schematic perspective view of a seat which shows the state where the airbag completed inflation. It is a top view which shows the state which the airbag completed the expansion | swelling in the airbag apparatus of embodiment. In the airbag apparatus of embodiment, it is the schematic seen from the vehicle front side which shows the state which the airbag completed the expansion | swelling. It is a schematic perspective view of the seat which shows the state which mounted the airbag of another form and completed the airbag. FIG. 12 is a plan view of a state where the airbag of FIG. 11 is flatly deployed.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the embodiment, the front-rear, up-down, left-right directions coincide with the front-rear, up-down, left-right directions of the vehicle unless otherwise specified.

  In the embodiment, as shown in FIG. 10, in a vehicle V including a driver seat DS and a passenger seat PS arranged side by side in the left-right direction, a case where a side collision occurs from the left LW (passenger seat PS side) Take an example and explain. That is, in the embodiment, the driver's seat DS positioned on the right RW is a separate seat far from the collision side (impact force acting side), and the passenger seat PS positioned on the left LW is the collision side (impact force acting side). An example of an airbag device M that protects the driver DP seated in the driver seat DS as a close-side occupant as a close-side passenger seat will be described.

  As shown in FIGS. 1 and 2, the driver seat DS on which the airbag apparatus M is mounted includes a seat portion 1, a backrest portion 2 extending upward from the rear end side of the seat portion 1, and an upper end side of the backrest portion 2. The headrest 10 protrudes upward from the vicinity of the left and right centers.

  As shown in FIG. 10, the backrest 2 is configured to include a seat frame 3 made of a sheet metal material and having a substantially inverted U shape, and a cushion 8 arranged so as to cover the periphery of the seat frame 3. . The seat frame 3 connects the left frame portion 4 and the right frame portion 5 disposed over substantially the entire upper and lower sides in the vicinity of the left and right edges of the backrest portion 2 and the upper ends of the left frame portion 4 and the right frame portion 5. And an upper frame portion 6 disposed in the vicinity of the upper end of the backrest portion 2 (see FIG. 10). The left frame portion 4 and the right frame portion 5 are configured as strips that substantially extend the width direction in the front-rear direction. The upper frame portion 6 is arranged substantially along the left-right direction. In the case of the embodiment, as shown in FIG. 4, the horizontal wall portion 6a arranged substantially along the horizontal direction and the rear end of the horizontal wall portion 6a. A vertical wall portion 6b extending downward from the side, and having a substantially L-shaped cross section. In the case of the embodiment, as shown in FIGS. 3 and 4, the airbag 22 is folded and stored in a gap between the seat frame 3 and the cushion 8 in the backrest 2. Note that a skin (not shown) is disposed on the outer surface side of the cushion 8 of the backrest 2, but this skin is broken when the airbag 22 is deployed and inflated. As shown in FIGS. 1 and 4, the headrest 10 is configured to be attached to the lateral wall portion 6 a of the upper frame portion 6 of the seat frame 3 so that the height position can be adjusted using a stay 11 extending downward. Therefore, two stays 11 are arranged side by side along the left-right direction (see FIG. 2).

  As shown in FIGS. 1 to 5, the airbag apparatus M includes an airbag 22 that is folded and stored in the backrest portion 2 of the driver seat DS, an inflator 14 that supplies inflation gas to the airbag 22, an airbag And mounting brackets 18 for mounting mounting pieces 24 and 34 (described later) of the bag 22 to the seat frame 3.

  4 and 5, in the case of the embodiment, the inflator 14 includes a cylinder-type main body 15 whose outer shape is a substantially cylindrical shape, and a diffuser 16 that covers the outer peripheral side of the main body 15. It arrange | positions so that a direction may be followed to the left-right direction. A plurality of gas discharge ports 15 a are formed on one end side (left end side in the case of the embodiment) of the main body 15. An operation signal input lead wire (not shown) is connected to the other end side of the main body 15 and connected to the airbag operation circuit. As shown in FIG. 5, the diffuser 16 is formed in a substantially half-cylindrical shape that can cover an area of the front half of the main body 15, and a holding cylinder portion 16 a that holds the main body 15, and the holding cylinder portion 16 a. A substantially semi-cylindrical cover portion 16b configured to cover the rear side in the vicinity of the gas discharge port 15a of the main body 15 and a plurality of (two in the embodiment) bolts 16c protruding from the holding cylinder portion 16a. . In the inflator 14 of the embodiment, the expansion gas G discharged from the gas discharge port 15a of the main body 15 is guided by the cover portion 16b, and inside the mounting expansion portion 28 on both the left and right sides as shown in FIG. It will flow towards. The inflator 14 is accommodated in the mounting inflating portion 28 of the airbag 22 so that the bolt 16c of the diffuser 16 protrudes, and the bolt 16c of the diffuser 16 protruding from the mounting inflating portion 28 is The frame 3 is attached to the upper frame portion 6 together with the mounting and inflating portion 28 of the airbag 22 by fastening a nut near the left and right center of the vertical wall portion 6b of the upper frame portion 6 (see FIGS. 4 and 5). ).

  The mounting bracket 18 for mounting the mounting pieces 24 and 34 of the airbag 22 to the seat frame 3 (the left frame portion 4 and the right frame portion 5) is composed of two sheet metal plates. The parts 24 and 34 are attached to the attachment pieces 24 and 34 so as to be sandwiched from the front and back sides, and the attachment pieces 24 and 34 are attached and fixed to the seat frame 3 using the bolts 19 (see FIG. 3).

  In the embodiment, when the inflation is completed, the airbag 22 widely covers the left side LW (impact force acting side) of the driver DP seated in the driver's seat DS and the right side RW (separation) as shown in FIGS. Side) is also configured to cover. In detail, the airbag 22 is mounted on the upper frame portion 6 of the seat frame 3 and the occupant protection portion 23 that is inflated so as to cover the left side LW of the driver DP when the inflation is completed. The mounting inflating portion 28, the communication bending portion 31 that connects the occupant protection portion 23 and the mounting inflating portion 28, the separation side inflating portion 33 that inflates to cover the right side RW of the driver DP when the inflation is completed, and the separation side And a second communication bending portion 35 that allows the expansion portion 33 and the attachment expansion portion 28 to communicate with each other. The airbag 22 has attachment pieces 24 and 34 on the rear lower end sides of the occupant protection portion 23 and the separation-side inflation portion 33 when the inflation is completed, and the attachment pieces 24 and 34 are attached to the airbag 22. The bracket 18 and the bolt 19 are used to attach and fix to the left frame portion 4 and the right frame portion 5 of the seat frame 3, respectively. In the case of the embodiment, as shown in FIG. 6, the airbag 22 has substantially the same outer shape, and when the inflation is completed, the airbag 22 has an inner wall portion 22 a disposed on the inner side and an outer side. The outer peripheral wall portion 22b disposed on the outer periphery of the outer wall portion 22b is joined to each other to form a bag shape. In the airbag 22 of the embodiment, as will be described later, the outer wall portion 22b is longer than the inner wall portion 22a in the areas of the communication bending portion 31 and the second communication bending portion 35 by the tacks 32 and 36. It is configured to increase the dimensions. Specifically, in the case of the embodiment, the airbag 22 includes an inner wall portion 22a made of a coated cloth obtained by applying a coating agent such as silicon on the surface of a flexible woven cloth made of polyamide yarn, polyester yarn or the like. The outer peripheral edges of the outer wall portion 22b are sewn together using a suture thread, and are configured in a bag shape.

  In the embodiment, the occupant protection unit 23 is configured to expand so as to cover the region of the chest DB of the driver DP on the left side LW of the driver DP. The occupant protection part 23 is folded and stored on the left side surface of the backrest part 2. When the inflator 14 is operated, the occupant protection part 23 allows the inflation gas to flow into the front part from the left side surface side of the backrest part 2. It is comprised so that it may protrude toward. The occupant protection part 23 has an attachment piece 24, and the attachment piece 24 is attached to the left frame part 4, which is a part on the side surface side of the seat frame 3, using the attachment bracket 18 and the bolt 19. It is set as the structure fixed by attachment (refer FIG. 7). In the case of the embodiment, the attachment piece portion 24 is disposed at a position on the rear lower end side when the inflation is completed in the occupant protection portion 23. In other words, the occupant protection portion 23 includes a protruding portion 23a that protrudes forward from the mounting piece portion 24 when the inflation is completed (see FIGS. 6, 7, and 9). Further, in the airbag 22 of the embodiment, the head protection unit 25 configured to cover the left side LW of the region of the head DH of the driver DP when the inflation is completed, on the upper side of the passenger protection unit 23 when the inflation is completed. Is disposed (see FIGS. 7, 8 and 10). The head protection part 25 is arranged on the upper side of the occupant protection part 23 at the completion of the inflation so as to be continuous with the occupant protection part 23. In the case of the embodiment, the head protection part 25 and the occupant protection part 23 are arranged. A partition portion 26 configured by sewing the inner wall portion 22a and the outer wall portion 22b so as to partially partition the head protection portion 25 and the passenger protection portion 23 is disposed between (See FIG. 7). In the case of the embodiment, three partition portions 26 are arranged in parallel along the front-rear direction as a substantially rod shape along the vertical direction.

  The mounting expansion part 28 is disposed in the vicinity of the upper end of the backrest part 2, and the expansion completion shape is substantially cylindrical with the axial direction being substantially along the left-right direction so as to be substantially along the width direction of the backrest part 2. (See FIGS. 8 and 9). The attachment inflating portion 28 is attached to the vertical wall portion 6b of the upper frame portion 6 together with the inflator 14 by attaching the inflator 14 disposed therein to the vertical wall portion 6b of the upper frame portion 6 of the seat frame 3. Therefore, a mounting hole 28a through which the bolt 16c of the diffuser 16 can be inserted is provided in the region of the inner wall portion 22a near the center in the left-right direction (see FIG. 6). And this attachment expansion part 28 will be arrange | positioned substantially along the rear surface side of the vertical wall part 6b at the time of completion of expansion. In the case of the embodiment, the attachment inflating portion 28 is disposed in the cushion 8 without protruding from the backrest portion 2 to the outer peripheral side (rear side) when the airbag 22 is completely inflated. Further, as shown in FIG. 6, the mounting inflating portion 28 is configured to include an extending portion 29 made of a non-inflating portion that does not allow the inflating gas to flow inside, on the leading edge side. Two insertion holes 29a through which the stays 11 of the headrest 10 can be inserted are provided. In the airbag 22 of the embodiment, the extending portion 29 is arranged so as to cover the upper surface side of the lateral wall portion 6a in the upper frame portion 6 of the seat frame 3, and each stay 11 is inserted into the insertion hole 29a. By attaching the headrest 10 to the upper frame portion 6 as described above, the attachment expansion portion 28 is attached to the seat frame 3 using the stay 11 (see FIG. 4).

  As shown in FIG. 9, the communication bending portion 31 includes an attachment inflating portion 28 disposed so as to cover the rear surface side of the upper frame portion 6 of the seat frame 3 in the airbag 22 at the time of completion of inflation, It is a portion that is bent and arranged so as to communicate with the occupant protection portion 23 that is arranged so as to cover the left surface side of the left frame portion 4. As shown in FIG. 6, the communication bent portion 31 is formed so as to be connected to the mounting inflating portion 28 with the width dimension substantially the same as that of the mounting inflating portion 28 in a state where the airbag 22 is flatly deployed. . That is, the communication bending portion 31 is configured such that the outer diameter size at the time of completion of expansion substantially coincides with the mounting expansion portion 28 without partially reducing the outer diameter size. In addition, the communication bending portion 31 is provided with a tack 32 over the entire width direction (front-rear direction) at a portion of the outer wall portion 22b that is disposed outside when the expansion is completed (see FIG. 6). The length dimension in the vertical direction is made larger than the vertical dimension of the inner wall portion 22a. That is, when the expansion gas flows into the interior and expands, the outer wall portion 22b extends the tack 32 so that the film length on the vertical side is larger than the inner wall portion 22a. The communication bending portion 31 is easily bent at the portion of the tack 32 when the airbag 22 is inflated due to the film length difference between the outer wall portion 22b and the inner wall portion 22a. When the expansion of 22 is completed, it will be bent and arranged in a state of maintaining a bent cylindrical shape exhibiting rigidity.

  In the case of the embodiment, as shown in FIGS. 8 to 10, the separation side inflating portion 33 is configured to expand so as to cover the region of the chest DB of the driver DP on the right side RW (separation side) of the driver DP. Has been. In the case of the embodiment, as shown in FIG. 6, the separation-side expansion portion 33 is configured so that the outer shape of the flattened state is substantially the same as the outer shape of the occupant protection portion 23 in the flattened state. Yes. The separation-side expansion portion 33 is folded and housed on the right side surface side of the backrest portion 2. When the inflator 14 is operated, the separation side expansion portion 33 is caused to flow expansion gas into the interior and from the right side surface side of the backrest portion 2. It is comprised so that it may protrude toward the front. Further, the separation-side expansion portion 33 is also not shown in detail, but has a configuration in which an attachment piece portion 34 disposed at a position on the rear lower end side when expansion is completed is attached and fixed to the right frame portion 5 of the seat frame 3. Has been. That is, the separation-side inflating portion 33 is also configured to include a protruding portion 33a that protrudes forward from the attachment piece portion 34 when the inflating is completed, like the occupant protection portion 23 (see FIGS. 6 and 9).

  The second communication bent portion 35 includes an attachment inflating portion 28 disposed so as to cover the rear surface side of the upper frame portion 6 of the seat frame 3 and the right frame portion 5 of the seat frame 3 in the airbag 22 when inflation is completed. It is a site | part arrange | positioned so that it may communicate with the separation side expansion part 33 arrange | positioned so that the right surface side may be covered (refer FIG. 9). Similar to the above-described communication bending portion 31, the second communication bending portion 35 has a width dimension substantially the same as that of the attachment inflating portion 28 in a state where the airbag 22 is flatly deployed, and is connected to the attachment inflating portion 28. (See FIG. 6). Further, the second communication bent portion 35 is also provided with a tack 36 over the entire region in the width direction (front-rear direction) at the portion of the outer wall portion 22b that is disposed outside when the expansion is completed (see FIG. 6). The length dimension of the wall part 22b in the vertical direction is made larger than the vertical dimension of the inner wall part 22a. In other words, the second communication bent portion 35 is also bent and arranged while maintaining the bent tube shape when the airbag 22 is inflated.

  In the airbag apparatus M according to the embodiment, the inflator 14 is activated in response to an actuation signal from the airbag actuation circuit at the time of a side collision in which a collision object (not shown) collides from the left side LW of the vehicle V, and the airbag 22 is activated. However, as shown in FIGS. 7 to 10, the occupant protection part 23 and the separation side expansion part 33 are connected to the left side LW (collision force acting side) and the right side of the driver DP. Expansion is completed so as to cover the RW (remote side).

  And in the airbag apparatus M of embodiment, the airbag 22 expand | swells so that it may protrude from the backrest part 2, and the passenger | crew protection part 23 which covers the impact force action side (left side LW) of driver | operator DP as a separation side passenger | crew is covered. And a mounting inflating portion 28 that is arranged so as to be substantially along the width direction of the backrest portion 2 and is attached to the upper frame portion 6 of the seat frame 3, and the occupant protection portion 23 is formed by the communication bending portion 31. The mounting expansion part 28 is communicated. And this communication bending part 31 is comprised so that it may be bent in the state which maintained the curved cylinder shape. That is, in the airbag apparatus M according to the embodiment, the airbag 22 at the time of completion of inflation is arranged so that the mounting inflation portion 28 and the occupant protection portion 23 are substantially orthogonal, with the communication bending portion 31 in between, and the vertical direction side. As shown in FIG. 9, the communication bending portion 31 that connects the mounting expansion portion 28 and the occupant protection portion 23 is continuous from the mounting expansion portion 28. The outer diameter dimension at the time of completion of expansion is substantially matched with the mounting expansion portion 28 without being partially narrowed, and is bent while maintaining the curved cylindrical shape. It becomes an aspect which has rigidity. Therefore, when the airbag 22 is completely inflated, when the driver DP is received by the occupant protection portion 23, the driver is connected to the communication bent portion 31 connected to the mounting inflating portion 28 attached to the upper frame portion 6 of the seat frame 3. Due to the behavior of the occupant protection part 23 at the time of DP reception, a force that stretches the twisted or bent state acts, but the communication bending part 31 that expands to become a rigid body while maintaining a curved cylindrical shape, The occupant protection part 23 can be prevented from moving away from the backrest part 2 along the left-right direction without being deformed against the twist and elongation, and the driver DP can be accurately received. As a result, in the airbag apparatus M of the embodiment, the driver DP can be accurately received only by the airbag 22 that has been inflated, so that the configuration can be simplified and the number of parts can be increased. The increase in manufacturing cost can also be suppressed without inviting.

  Therefore, in the airbag device according to the embodiment, the driver DP as the separation-side occupant can be accurately protected with a simple configuration and the inflated airbag 22.

  Further, in the airbag device M of the embodiment, the occupant protection part 23 includes the attachment piece part 24 attached to the left frame part 4 of the seat frame 3, and the driver's seat DS rather than the attachment piece part 24 when the inflation is completed. Is provided with a protruding portion 23a that protrudes toward the front of the driver DP seated on the vehicle. That is, in the airbag apparatus M of the embodiment, the occupant protection portion 23 is attached to the left frame portion 4 of the seat frame 3 by the attachment piece portion 24, so that the occupant protection portion separated from the attachment inflating portion 28. The lower end side of 23 can be fixed to the side surface of the backrest part 2 without making it a free end, and when the driver DP is received, the occupant protection part 23 moves from the backrest part 2 along the left-right direction. Moving away can be further prevented, and the driver DP can be more appropriately protected. In particular, in the airbag apparatus M of the embodiment, the attachment piece 24 is arranged on the rear lower end side of the occupant protection part 23 when the inflation is completed. Therefore, in the airbag apparatus M of the embodiment, the occupant protection portion 23 has the head protection portion 25 that extends upward when the inflation is completed, and is configured to expand widely up and down, but the communication bending portion 31 and the attachment piece The upper and lower ends of the occupant protection part 23 when the inflation of the occupant protection part 23 is completed can be supported by the part 24. When the driver DP is received, the occupant protection part 23 and the head protection part 25 are It can suppress moving away from 2, and can protect exactly from the chest DB of the driver DP to the head DH. In addition, in embodiment, although the attachment piece part 24 is arrange | positioned only in one place on the back lower end side, the number and arrangement position of an attachment piece part are not restricted to this, You may arrange multiple. Moreover, you may arrange | position in the position used as an up-and-down intermediate part. Further, in the embodiment, the mounting inflating portion 28 is attached to the seat frame 3 using the inflator 14, but the occupant protection portion is attached to the seat frame together with the inflator as a configuration in which the inflator is disposed at the site of the occupant protection portion. The part attached to the seat frame together with the inflator in the occupant protection part may be an attachment piece part.

  If the above points are not taken into consideration, the airbag 38 may be configured as shown in FIGS. The airbag 38 shown in FIGS. 11 and 12 includes an occupant protection part 39, an attachment inflating part 40, and a communication bending part 41 that communicates the occupant protection part 39 and the attachment inflating part 40. The occupant protection unit 39 is also configured to have a substantially cylindrical expansion completion shape. In detail, the airbag 38 shown in FIG. 12 is obtained by sewing (joining) the peripheral edges of two airbag base fabrics cut into a substantially L-shaped belt shape using sutures. The expansion completion shape is configured as a rod-like body bent into a substantially L-shape, and the occupant protection part 39 has a width dimension (outer diameter dimension at the completion of the expansion) in a state of being flattened, and the mounting expansion part 40. It is set larger. Then, as shown in FIG. 11, the occupant protection part 39 is attached from the mounting inflating part 40 attached so as to be along the left-right direction on the back side of the seat frame at a position slightly below the upper end of the backrest part 2. The configuration is arranged so as to protrude forward and upward so as to be substantially orthogonal to the mounting inflating portion 40 and to be substantially orthogonal to the left frame portion of the seat frame via the communication bending portion 41. Also in the airbag 38, the communication bent portion 41 is configured to be bent while maintaining a bent tube shape. Also in the airbag 38 having such a configuration, the airbag 38 at the time of completion of inflation is arranged in a substantially L shape, and the communication bending portion 41 that connects the mounting inflation portion 40 and the occupant protection portion 39. Since it is bent in a state in which the bent tube shape is maintained, it becomes a mode having rigidity. Therefore, when the inflation of the airbag 38 is completed, when the driver (separate side occupant) is received by the occupant protection unit 39, the communication bend portion 41 connected to the mounting inflating portion 40 attached to the seat frame is received by the driver. Depending on the behavior of the occupant protection part 39, a force that stretches the twisted or bent state acts, but the communication bent part 41 that expands to become a rigid body while maintaining the bent cylindrical shape is The occupant protection part 39 can be prevented from moving away from the backrest part 2 along the left-right direction without being deformed against the elongation, and the driver can be accurately received. As a result, even in the airbag 38 having such a configuration, the driver can be accurately received only by the airbag 38 that has been inflated.

  Furthermore, in the airbag apparatus M of the embodiment, the airbag 22 is in communication with the mounting and inflating portion 28 and is inflated so as to cover the remote side (right RW) far from the impact force acting side of the driver DP. An inflating part 33 is provided. That is, in the airbag apparatus M of the embodiment, the right side RW of the driver DP can be covered with one airbag 22, so that the driver DP is directed toward the right side RW at the time of a side collision from the left side LW. The driver DP can be received by the distant side inflating portion 33 even if the driver DP is moved. Of course, if such a point is not taken into consideration, an airbag having a configuration not including the separation side inflating portion may be used.

  In the airbag apparatus M of the embodiment, the separation-side inflating part 33 formed in the airbag 22 has an outer shape substantially the same as the occupant protection part 23, and can protect the chest DB of the driver DP. Since the size is set, it is possible to inflate the airbag 22 so as to protect the chest DB of the driver DP in the event of a side collision from the right side RW. . Furthermore, in the airbag apparatus M of the embodiment, the separation-side inflation portion 33 is also communicated with the attachment inflation portion 28 via the second communication bending portion 35, so the attachment inflation portion 28 and the separation-side inflation portion 33. Are arranged in a substantially L shape when viewed from the vertical direction side so as to be substantially orthogonal to each other with the second communication bent portion 35 interposed therebetween, and the mounting expansion portion 28 and the separation side expansion The second communication bent portion 35 connecting the portion 33 is also formed so as to continue from the mounting expansion portion 28, and the outer diameter size at the completion of expansion is attached without partially reducing the outer diameter size. Since it is bent substantially in the same manner as the inflatable portion 28 while maintaining the bent tube shape, it has an aspect that has rigidity. Therefore, when the air bag 22 is completely inflated, the second communication bent portion 35 maintains the bent state in the same manner as the above-described communication bent portion 31 when the separation side inflatable portion 33 receives the driver DP. Thus, it is possible to suppress the separation-side expansion portion 33 from moving away from the backrest portion 2 along the left-right direction, and the driver DP can be accurately received. Further, the separation-side expansion portion 33 is configured to be attached to the right frame portion 5 of the seat frame 3 by the attachment piece portion 34 at the rear lower end side when the expansion is completed, so when receiving the driver DP, It is possible to further prevent the separation-side expansion part 33 from moving away from the backrest part 2 and to protect the driver DP more accurately.

  In the embodiment, the airbags 22 and 38 are flat bags in which the peripheral edges of two base fabrics having substantially the same outer shape are connected to each other. However, the airbags are limited to the flat bags. For example, a three-dimensional bag formed in a three-dimensional manner by sewing the peripheral edges of a predetermined-shaped base fabric, a resin bag made of synthetic resin, or the like may be used.

  In the embodiment, the airbag device that protects the driver seated in the driver's seat as the separation side seat as a separation side occupant at the time of a side collision from the side (left side) of the passenger seat has been described as an example. Of course, the present invention may be applied to a device that protects an occupant seated in a passenger seat as a separated side seat as a separated side occupant during a side collision from the side (right side) of the driver's seat. Furthermore, the airbag device of the present invention is not limited to a device that protects an occupant seated in the front seat of the vehicle, and may be configured to protect an occupant seated in the back seat of the vehicle. The present invention can also be applied to a vehicle including seats arranged side by side in the front-rear direction.

2 ... backrest,
3 ... seat frame,
14 ... Inflator,
22 ... Airbag,
23 ... Occupant protection department,
23a ... protruding part,
24 ... Mounting piece,
28 ... mounting expansion part,
31 ... Communication bending part,
33 ... remote side expansion part,
38 ... Airbag,
39 ... Occupant protection department,
40 ... mounting expansion part,
41 ... Communication bending part,
DP ... Driver (distant passenger),
DS ... Driver seat (separate seat),
LW ... left side (impact force acting side),
RW ... Right side (remote side),
V ... Vehicle,
M: Airbag device.

Claims (3)

A remote-side occupant mounted on a vehicle configured by arranging a plurality of seats and seated on a remote-side seat far from the impact force application side when an impact force is applied from one side in the side-by-side direction of the seats. An airbag device configured to include a airbag which is configured to be protected and is folded and stored in a backrest portion of the remote seat,
The airbag is
An occupant protection part that flows in the inside and protrudes from the side of the impact force acting side of the backrest part and inflates so as to cover the impact force acting side of the separated occupant;
An attachment inflating part that is arranged so as to be substantially along the width direction of the backrest part and is attached to the seat frame of the seat, and inflates by inflating with an inflating gas;
A communicating bent portion that is bent and arranged in a state where the bent cylinder shape is maintained so as to communicate the occupant protection portion and the mounting expansion portion,
An air bag apparatus comprising:   The occupant protection portion includes an attachment piece portion that is attached to a portion on the side surface side of the seat frame, and at the time of completion of expansion, the occupant protection portion is located in front of the separation side occupant seated on the separation side seat rather than the attachment piece portion. The airbag device according to claim 1, wherein the airbag device is provided with a protruding portion that protrudes in a direction that becomes. The said airbag is provided with the separation side expansion | swelling part which expand | swells so that the separation side far from the impact force action side of the said separation side passenger | crew may be communicated with the said attachment expansion part. The airbag apparatus according to 1 or 2.

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