JP2012245897A - Head-protecting airbag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head-protecting airbag device, in which an airbag completing the inflation accurately suppresses positional displacement in a forward and backward with respect to an intermediate pillar.SOLUTION: A head-protecting airbag M is mounted in a vehicle V having an intermediate pillar CP with side windows W1, W2 arranged at front or rear thereof. Airbags 19 folded to an upper edge sides of the side windows W1, W2 to be accommodated therein, are coupled to a front pillar FP side at a position where the front edge side in the completion of inflation is situated below the upper edges of the side windows W1, W2. Each of the airbags 19 includes: a shield inflation part 21; and support inflation parts 22F, 22B arranged on both sides at the front and rear of the intermediate pillar part CP by being inflated to project to the outside of the vehicle from the shield inflation part 21 when completing the inflation. The positions of the support inflation parts 22F, 22B are restricted in the intermediate pillar part CP to be control the displacement in a longitudinal direction with respect to the intermediate pillar part CP of the shield inflation part 21 when completing the inflation.

Description

  The present invention is mounted on a vehicle having an intermediate pillar portion in which side windows are arranged on the front and rear sides, is folded and stored on the upper edge side of the side window, and the body side of the vehicle is located on the upper edge side of the side window. Head protection with an airbag that is fixedly attached to the member and that expands and inflates so as to cover the inside of the side window, including the inside of the intermediate pillar, by allowing inflation gas from the inflator to flow The present invention relates to an airbag device.

  Conventionally, as a head protection airbag device having the above-described configuration, an airbag that inflates so as to cover the inside of the side window including the intermediate pillar portion has a substantially plate-like shape, and the inflation is completed. In some cases, the portion covering the vehicle inner side of the intermediate pillar portion is configured not to allow the inflation gas to flow inside. This conventional head protection airbag device has a configuration in which the intermediate pillar portion is sandwiched between the expansion portions before and after the portion covering the inside of the intermediate pillar portion (see, for example, Patent Documents 1 and 2).

JP 2003-63345 A Special table 2001-518860 gazette

  However, in the conventional head protection airbag device, the portion that covers the inner side of the intermediate pillar portion when the inflation is completed is configured so that the inflation gas does not flow inside, and the portion that is disposed before and after the intermediate pillar portion Is made up of an expansion portion into which the expansion gas is allowed to flow, so that the difference in thickness between the two is small. Further, in the conventional head protection airbag device, in any case, the inflated portions arranged before and after the intermediate pillar portion are regions on the upper end side arranged on the vehicle inner side of the intermediate pillar portion, and the inflating gas is contained therein. Since they are communicated with each other so as to flow in, when the inflation of the airbag is completed, the inflated portions arranged before and after the intermediate pillar portion are easily lifted to the inside of the vehicle. There was a case where the position was shifted back and forth.

  The present invention solves the above-described problems, and provides a head protection airbag device capable of accurately suppressing the displacement of an airbag that has been inflated from front to back with respect to an intermediate pillar portion. For the purpose.

A head protection airbag device according to the present invention is mounted on a vehicle having an intermediate pillar portion in which side windows are arranged on the front and rear sides, is folded and stored on the upper edge side of the side window, and the upper edge side is extended in the front-rear direction. A plurality of mounting portions are mounted and fixed to the vehicle body side member located on the upper edge side of the side window, and the inflating gas from the inflator is caused to flow into the interior of the intermediate pillar portion. Including a head protection airbag device having an airbag that expands and inflates so as to cover the inside of the side window.
Airbag
The front edge side at the time of completion of expansion is connected to the front pillar portion side disposed on the front side of the front side window at a position below the upper edge side of the side window, and
When the expansion is completed, a shielding expansion part that covers the vehicle interior of the side window and the expansion completion shape is substantially plate-shaped
When the expansion is completed, at the position above the belt line that forms the lower edge side of the side window, it expands so as to protrude from the shield expansion part to the outside of the vehicle, and is arranged on both the front and rear sides of the intermediate pillar part, and the expansion is completed A support expansion part whose position is regulated by the intermediate pillar part so that the displacement in the front-rear direction with respect to the intermediate pillar part of the shielding expansion part at the time can be suppressed;
It is set as the structure provided with.

  In the head protection airbag device of the present invention, in the airbag, the support inflation arranged on both the front and rear sides of the intermediate pillar portion so as to suppress the displacement of the shielding inflation portion in the front and rear direction with respect to the intermediate pillar portion when the inflation is completed Since the portion is arranged so as to protrude from the plate-shaped shield inflating portion to the outside of the vehicle, the protruding amount of the support inflating portion from the shielding inflating portion is larger than that of the conventional head protection airbag device. Can be secured. In other words, in the head protection airbag device of the present invention, in the support inflating portion, a large area is overlapped with the intermediate pillar portion projecting from the side window to the vehicle inner side on the vehicle interior / external direction (vehicle width direction) side. Therefore, even if the shield expansion part at the time of completion of expansion moves so as to float inside the vehicle, the support expansion part can be prevented from floating away from the intermediate pillar part, and the support expansion part can be The position can be regulated by the part.

  In the head protection airbag device of the present invention, the airbag (shielding inflating portion) is fixedly attached to the vehicle body side member by a plurality of mounting portions arranged along the front-rear direction on the upper edge side, Since the front edge side when the expansion is completed is connected to the front pillar portion side at a position below the upper edge side of the side window, the shield pillar and the expansion portion when the expansion is completed is connected to the front pillar portion. A tension substantially along the front-rear direction can be generated from the connecting portion to the attachment portion on the rear edge side of the upper edge, and the shield expansion part can be prevented from loosening on the front-rear direction side. Therefore, in the head protection airbag device of the present invention, the head of the occupant seated in the seat arranged in front of the intermediate pillar portion strongly presses the shielding inflating portion toward the outside of the vehicle when the inflation of the airbag is completed. Even if it is to be done, the support expansion part arranged on the rear side of the intermediate pillar part is supported by the intermediate pillar part on the front side, and the entire shield expansion part is greatly displaced forward. In addition, it is possible to suppress the movement of the entire shield expansion part to the vehicle exterior side. On the contrary, even if the head of the occupant seated in the seat disposed behind the intermediate pillar portion strongly presses the shielding expansion portion toward the outside of the vehicle, it is disposed on the front side of the intermediate pillar portion. The support expansion part is supported by the intermediate pillar part on the rear surface side, so that the entire shield expansion part can be prevented from being greatly displaced rearward, and the entire shield expansion part can also be moved to the outside of the vehicle. Can be suppressed. As a result, the movement of the occupant's head to the outside of the vehicle can be accurately suppressed.

  Therefore, in the head protection airbag device of the present invention, it is possible to accurately suppress the airbag that has been inflated from being displaced forward and backward relative to the intermediate pillar portion.

  Further, in the head protection airbag device of the present invention, if the support inflating part is configured to complete the inflation after the inflating of the shielding inflating part, the operation of the inflator for supplying the inflation gas into the airbag starts. Even during a rollover after a predetermined time has elapsed, it is possible to ensure a certain level of the internal pressure of the support expansion portion. For this reason, the support inflating part that maintains a high internal pressure can be supported by the intermediate pillar part even at the time of rollover after the inflation of the airbag is completed. This is preferable because it can be prevented from being displaced forward and backward.

Specifically, in the head protection airbag device of the present invention, the airbag is
A bag body in which the support inflating portion and the shielding inflating portion are integrally configured so that the support inflating portion protrudes downward from the lower edge side of the shielding inflating portion in a flatly deployed state;
Extending from the support inflatable portion side, coupled to the upper side of the support inflatable portion in the shield inflatable portion, and capable of holding the support inflatable portion to be lifted from the lower side of the shield inflatable portion to the vehicle exterior when the bag body is inflated With tether,
It is preferable to set it as the structure provided with.

  In the head protection airbag device having the above-described configuration, since the support inflating portion is configured integrally with the shielding inflating portion, the supporting inflating portion is formed separately from the shielding inflating portion and attached separately to the shielding inflating portion side. Compared to the case, manufacturing man-hours and costs can be reduced.

  In addition, if the airbag is configured so that the support inflating portion is disposed so as to overlap the outside of the shielding inflating portion and the inflating gas is allowed to flow into the inside of the shielding inflating portion, the tether can be used. Good.

  Further, in the head protection airbag device having the above-described configuration, if the resistance imparting layer that improves the frictional force against the intermediate pillar portion is disposed on the outer surface side of the support inflating portion, the supporting inflating portion is in the middle. This is preferable because it is difficult to be displaced from the pillar portion, and the support expansion portion can be more accurately supported by the intermediate pillar portion.

It is the schematic front view which looked at the head protection airbag apparatus which is one Embodiment of this invention from the vehicle inside. It is a front view of the state where the air bag used with the head protection air bag device of an embodiment was developed flat. FIG. 3 is a front view showing a state in which the airbag of FIG. 2 is folded back so that the support inflating portion is positioned on the vehicle exterior side of the shielding inflating portion and flattened. In the head protection airbag device of an embodiment, it is the outline front view which looked at the state where the airbag completed inflation from the car inside. In the head protection airbag device of an embodiment, it is a schematic longitudinal cross-sectional view along the left-right direction (vehicle width direction) which shows the state where the support inflation part expanded after the expansion of the shield inflation part. In the head protection airbag device of the embodiment, it is a schematic cross-sectional view along the front-rear direction showing a state in which a support inflating portion is inflated after the shielding inflating portion is inflated. It is a front view which shows the state which expand | deployed flat the airbag of the other form of this invention. FIG. 8 is a schematic front view of the head protection airbag device using the airbag of FIG. 7 as seen from the inside of the vehicle when the airbag is completely inflated. FIG. 8 is a schematic longitudinal sectional view along the left-right direction showing a state in which the support inflating portion is inflated after the shielding inflating portion is inflated in the head protecting airbag device using the airbag of FIG. 7. In the airbag of this invention, it is a schematic perspective view which shows the adsorption layer which can be stuck on the outer surface side of a support expansion part.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the head protection airbag device M of the embodiment is a two-row seat type in which two windows (side windows) W <b> 1 and W <b> 2 are arranged before and after a center pillar portion CP as an intermediate pillar portion. It is mounted on the vehicle V. In the vehicle V equipped with the head protection airbag device M of the embodiment, the pillar garnish 6 that covers the inner side of the inner panel 2 that constitutes the center pillar portion CP protrudes toward the inner side I of the front and rear windows W1, W2. Are arranged (see FIG. 6).

  The head protection airbag device M according to the embodiment includes an airbag 19, an inflator 14, mounting brackets 11 and 15, and an airbag cover 9. As shown in FIG. 1, the airbag 19 passes from the lower edge side of the front pillar portion FP to the lower edge side of the roof side rail portion RR on the upper edge side of the windows (side windows) W1 and W2 on the inner side of the vehicle V. The folded portion is stored up to the region above the rear pillar portion RP.

  As shown in FIGS. 1 and 5, the airbag cover 9 is formed from the lower edges of the front pillar garnish 4 disposed in the front pillar portion FP and the roof head lining 5 disposed in the roof side rail portion RR. ,It is configured. The front pillar garnish 4 and the roof head lining 5 are made of synthetic resin and attached to the inner side of the inner panel 2 (body side member) on the body 1 side at the front pillar portion FP and the roof side rail portion RR, respectively. It is fixed. The airbag cover 9 is disposed so as to cover the inside of the airbag 19 that is folded and accommodated, and in order to allow the airbag 19 to be protruded downward in the interior of the vehicle when being inflated. It is configured to be pushed by the bag 19 and open to the inside of the vehicle.

  The inflator 14 supplies inflation gas to the airbag 19, and as shown in FIG. 1, as a substantially cylindrical cylinder type, a gas discharge port (not shown) capable of discharging inflation gas is provided on the tip side. It is arranged. The inflator 14 has a distal end side including the vicinity of the gas discharge port inserted into a gas inlet portion 26 described later of the airbag 19, and the periphery of the gas inlet portion 26 is divided in the front and rear in the case of the embodiment. The front portion of the bracket 15 is used to connect to the airbag 19. Further, the inflator 14 uses the mounting bracket 15 for holding the inflator 14 and the bolt 16 for fixing the mounting bracket 15 to the inner panel 2 (body side member) on the body 1 side in the inner panel 2. , Are attached to a position above the window W2. The inflator 14 is electrically connected to a control device (not shown) of the vehicle via a lead wire (not shown), and when the control device detects a side collision of the vehicle V, it inputs an operation signal from the control device. And is configured to operate.

  Each mounting bracket 11 is composed of two sheet metal plates. Each mounting bracket 11 is attached to each mounting portion 40 so as to sandwich each mounting portion 40 to be described later of the airbag 19 from the front and back. Each attachment portion 40 is fixedly attached to the inner panel 2 as a body side member.

  As shown in FIG. 4, the airbag 19 is inflated from the inflator 14 and expanded from the folded state, and is disposed between the windows W1 and W2 and the windows W1 and W2. The pillar garnish 6 of the CP and the pillar garnish 7 of the rear pillar portion RP disposed on the rear side of the window W2 are configured to expand and expand so as to cover the inside of the vehicle. As shown in FIGS. 5 and 6, the airbag 19 has a substantially inflated shape as a substantially plate-like shape, and includes a shield inflating portion 21 that covers the vehicle inner side from the window W 1 to the window W 2, and Two support expansion portions 22F and 22B are provided so as to protrude so as to be disposed on both front and rear sides of the center pillar portion CP. The support inflating portions 22F and 22B are disposed at positions above the belt line BL constituting the lower edge side of the windows W1 and W2 (see FIG. 4). The shield inflating portion 21 has a substantially plate-like shape when the expansion is completed by disposing partition portions 41, 42, 43, and 44, which will be described later, in an internal region. Further, in the airbag 19 of the embodiment, in the shielding and inflating portion 21, the portions arranged in front and rear of the support inflating portions 22F and 22B respectively have the lower edge below the belt line BL when the inflating is completed. It is configured to be positioned (see FIG. 4).

  Further, the airbag 19 of the embodiment includes a bag body 20 and a tether 45. As shown in FIG. 2, the bag body 20 is configured so that the shield inflating portion 21 and the support inflating portions 22F and 22B are integrally formed and arranged so as to be connected vertically in a state where the bag main body 20 is flatly deployed. ,It is configured. That is, the support inflating portions 22F and 22B are formed so as to partially protrude downward from the lower edge side of the shielding inflating portion 21 in a state where the bag body 20 is flatly developed. In the case of the embodiment, the bag body 20 is manufactured by bag weaving using polyamide yarn, polyester yarn or the like.

  As shown in FIG. 2, the bag body 20 contains the inflation gas from the inflator 14 so that the vehicle interior side wall 24 a located on the vehicle interior side and the vehicle exterior wall portion 24 b located on the vehicle exterior side are separated when the inflation is completed. The gas inflow part 24 expand | swells by making it flow in, and the non-inflow part 38 which does not flow in the gas for expansion | swelling is comprised.

  In the embodiment, the gas inflow portion 24 includes the gas guide channel 25, the gas inlet portion 26, the protective expansion portion 28, the support expansion portions 22F and 22B, the support expansion portion 22 and the shield expansion portion in the shield expansion portion 21. The communication path part 36 which connects 21 is comprised. The support inflating portion 22 is arranged in a state of being folded back to the vehicle outer side O with respect to the shield inflating portion 21 so as to be positioned on the vehicle outer side O of the shield inflating portion 21 when the bag body 20 is inflated. Therefore, when the inflation of the airbag 19 is completed, the wall portion arranged so as to continue from the vehicle interior side wall portion 24a in the shield inflating portion 21 is directed outward or downward from the vehicle, and is continued from the vehicle exterior wall portion 24b in the shield inflating portion 21. Thus, it will be comprised so that the wall part arrange | positioned in this way may face a vehicle inner side or upper direction (refer FIG. 5).

  As shown in FIG. 2, the gas guide channel 25 is disposed over substantially the entire front and rear sides so as to extend substantially along the front-rear direction on the upper edge 21 a side of the shield inflating portion 21. In this configuration, the discharged expansion gas G is guided to the area of the protective expansion portion 28 disposed below the gas guide channel 25. In the case of the embodiment, a gas inlet 26 connected to the inflator 14 is disposed at a position slightly shifted forward from the front and rear center in the gas guide channel 25 and above a vertical cell 30A described later. It communicates with the channel 25 and is disposed so as to protrude upward from the gas guide channel 25. In the case of the embodiment, the gas inflow port portion 26 is formed so as to be inclined rearward with respect to the gas guide channel 25, and the rear end 26a side is opened so that the inflator 14 can be inserted. And the gas inflow port part 26 will be connected with the inflator 14 using the site | part of the front side of the attachment bracket 15 divided | segmented before and after in the state coat | covered by the inflator 14. FIG.

  As shown in FIG. 2, the protective inflating portion 28 includes two head restraining portions 29A and 29B for restraining the heads of the occupants seated on the seats disposed on the sides of the windows W1 and W2, and the head restraining portion. And an auxiliary expansion part 32 that is arranged between 29A and 29B and expands after the expansion of the head restraint parts 29A and 29B is completed.

  The head restraint portions 29A and 29B are inflated by causing the inflation gas G discharged from the inflator 14 to flow into the interior via the gas guide channel 25 and to expand when the vehicle V undergoes a side collision. It is a part that protects the head, and is disposed at two locations along the front-rear direction corresponding to the windows W1, W2.

  The head restraint portion 29A disposed on the side of the front seat has a front side portion 29a configured to extend to the lower side of the belt line BL on the front side and a lower edge on the rear side above the belt line BL. In the region of the rear portion 29b, two vertical cells 30A and 30B that are substantially along the vertical direction are arranged side by side in the front-rear direction. The front portion 29a is configured such that the upper end side is communicated with the gas guide flow path 25 and the inflation gas flows into the inside from the upper end side. The vertical cells 30 </ b> A and 30 </ b> B constituting the rear side portion 29 b are closed at the upper end side with respect to the gas guide flow path 25 by a partition portion 41 described later. The front vertical cell 30A is configured such that the lower end side is communicated with the front portion 29a and the inflation gas flows into the inside from the lower end side, and the rear vertical cell 30B has the upper end on the front vertical cell 30A. The expansion gas is introduced into the inside from the upper end side. The rear side portion 29b is a portion that covers the inside of the center pillar portion CP when expansion is completed. The head restraint portion 29B disposed on the side of the rear seat is configured to have a substantially rectangular expansion shape.

  The auxiliary inflating portion 32 is disposed between the head restraint portions 29A and 29B so as to fill a gap between the head restraint portions 29A and 29B. More specifically, the auxiliary inflating portion 32 communicates the upper end side with the vicinity of the upper end of the vertical cell 30B in the front head restraint portion 29A and is inclined rearwardly downward so that the lower end side is the rear head. It is comprised so that it may be located under the part restraining part 29B. Further, the auxiliary inflating portion 32 is configured such that the lower edge is positioned below the belt line BL when the airbag 19 is completely inflated. And this auxiliary expansion part 32 is set as the structure which flows in the gas for expansion into the inside from the communicating path part 33 of the upper end side connected with the vertical cell 30B. The auxiliary inflating portion 32 is a portion that is inflated in order to suppress occupant release from the vehicle during a rollover of the vehicle V that occurs after a side collision, and is configured to delay the start of inflation from the head restraint portions 29A and 29B. Has been. Specifically, the auxiliary expansion part 32 is used for expansion more than the head restraint parts 29A and 29B by reducing the opening width dimension (opening area) of the communication path part 33 communicating with the vicinity of the upper end of the vertical cell 30B. It is configured to delay the start of inflow of the gas G. Specifically, each head restraint portion 29A, 29B completes expansion in about 20 ms from the detection of the side collision of the vehicle V, whereas the auxiliary expansion unit 32 extends from detection of the side collision of the vehicle V to 20 ms. The opening width dimension (opening area) of the communication passage portion 33 is set so that the expansion gas G does not flow into the interior, and the expansion gas G flows within 30 ms to 100 ms after the side collision detection of the vehicle V. Is set.

  The support inflating portions 22F and 22B are formed so as to protrude downward from the lower edge 21b side of the shielding inflating portion 21 in a state where the bag body 20 is flatly developed. Specifically, the support inflating portions 22F and 22B are arranged on the inner side of the pillar garnish 6 so as to be positioned on both front and rear sides of the pillar garnish 6 covering the inner side of the center pillar portion CP when the inflation of the airbag 19 is completed. The lower portion near the rear end of the front portion 29a located in front of the rear portion 29b of the head restraint portion 29A and the lower portion near the front end of the auxiliary expansion portion 32 located behind the rear portion 29b, Each is arranged. Further, in the case of the embodiment, the positions of the support expansion portions 22F and 22B are restricted by the center pillar portion CP (pillar garnish 6) so that the displacement in the front-rear direction with respect to the center pillar portion CP can be restricted at the completion of the expansion. In addition, the outer shape of the bag body 20 in a flat developed state is a substantially rectangular shape with a slightly wider front and rear direction side.

  The support inflating portions 22F and 22B are communicated with the shielding inflating portion 21 through communication passage portions 36F and 36B arranged on the upper end side in a state where the bag body 20 is flatly deployed. Specifically, the front side support expansion part 22F is connected with the front side part 29a of the head restraint part 29A by the communicating path part 36F. The rear support expansion portion 22B communicates with the auxiliary expansion portion 32 through the communication passage portion 36B. And in the case of embodiment, each support expansion part 22F and 22B is comprised so that an expansion may be completed after the expansion of the shield expansion part 21 is completed. Since the support inflating portion 22B communicates with the auxiliary inflating portion 32 that starts to be inflated later than the head restraint portions 29A and 29B, the expansion can be completed after the head restraint portions 29A and 29B are completely inflated. it can. Similarly to the auxiliary inflatable part 32, the support inflating part 22F reduces the opening width dimension (opening area) of the communication path part 36F communicated with the head restraint part 29A, and the vehicle at the part of the communication path part 36F. By being folded outward, the start of inflow of the inflation gas G is delayed more than the head restraint portion 29A. More specifically, the support inflating portion 22F, like the auxiliary inflating portion 32, does not allow the inflating gas G to flow into the interior until 20 ms from the side collision detection of the vehicle V, and from 30 ms to 100 ms from the side collision detection of the vehicle V. The opening width dimension (opening area) of the communication path portion 36F is set so that the expansion gas G flows in between.

  As shown in FIG. 2, the non-inflow portion 38 includes a peripheral portion 39 that forms the peripheral portion of the bag body 20, a mounting portion 40 that attaches the airbag 19 to the inner panel 2 as a body side member, and a protective inflating portion 28. Partition sections 41, 42, 43, and 44 arranged in the region.

  The peripheral edge portion 39 is disposed so as to surround the periphery of the gas inflow portion 24 over the entire circumference except for the rear end 26a side of the gas inlet portion 26. The attachment part 40 is a part for attaching and fixing the upper edge 21a side of the shield expansion part 21 to the inner panel 2 as a body side member of the vehicle V. The attachment part 40 faces upward from the upper edge 21a side of the shield expansion part 21. And a plurality (seven in the embodiment) are formed along the front-rear direction. Each attachment portion 40 is formed with an attachment hole (not shown) through which the bolt 12 can be inserted. The partition portion 41 extends obliquely forward and upward from the region on the lower edge side in the peripheral edge portion 39, and partitions the head restraint portion 29B and the auxiliary inflation portion 32, while rear portions of the auxiliary inflation portion 32 and the head restraint portion 29A. 29b is configured to extend forward and to extend obliquely forward and downward so as to partition the front portion 29a and the rear portion 29b of the head restraint portion 29A. The partition portion 42 is formed to extend upward from the region on the lower edge side in the peripheral edge portion 39 so as to partition the vertical cells 30A and 30B. The partition part 43 is formed so as to extend upward from the region on the lower edge side in the peripheral part 39 so as to partition the vertical cell 30B and the auxiliary expansion part 32. The partitioning portion 44 extends forward from the rear edge side region of the peripheral edge portion 39 so as to partition the rear side region of the head restraint portion 29B and the gas guide channel 25, and the front end is directed downward. The shape is generally L-shaped. The ends of the partition portions 41, 42, 43, 44 are configured so as to expand gently and have a substantially arcuate periphery so as not to cause stress concentration when the airbag 19 is inflated. And the clearance gap between the terminal of the partition part 43 and the partition part 41 comprises the communicating path part 33 which flows in the gas for expansion | swelling in the auxiliary expansion part 32. FIG.

  The tether 45 is disposed at two locations as a belt-like shape extending from the lower edge side of each of the support inflating portions 22F and 22B in a state where the bag body 20 is flatly deployed. The side is connected to the upper edge 21a side of the shield inflating portion 21 and restricts the support inflating portions 22F and 22B to protrude from the shielding inflating portion to the vehicle outer side O when the expansion of the bag body 20 is completed. Specifically, in the case of the embodiment, the tether 45 is a separate body from the bag body 20 and, like the bag body 20, has a belt-like shape made of a woven fabric made of polyamide yarn or polyester yarn. The base portion 45a side is sewn to the peripheral portion 39 constituting the lower edge side of the support expansion portions 22F and 22B, and the tip 45b side is attached together with the mounting portion 40 protruding from the upper edge 21a of the shield expansion portion 21. The mounting bracket 11 and the bolt 12 are used to connect to the inner panel 2 as a body side member located on the upper edge 21a side of the shield inflating portion 21. An insertion hole (not shown) through which the bolt 12 can be inserted is formed on the tip 45b side of each tether 45. The tether 45 has a length dimension that is substantially in the horizontal plane so that the support inflating portions 22F and 22B are pulled up from the lower side of the shielding inflating portion 21 to the vehicle outer side O when the inflation of the airbag 19 is completed. It is set to a dimension that can be arranged by protruding from O. In the case of the embodiment, each of the tethers 45 folds the support expansion portions 22F and 22B to the outside of the vehicle at the communication passage portions 36F and 36B and extends upward, and the tip 45b is attached to the corresponding attachment portion 40. It is comprised so that it may protrude slightly upwards (refer FIG. 3).

  In the airbag 19 of the embodiment, a connecting belt 47 that is separate from the bag body 20 is disposed on the front edge side of the shield inflating portion 21. Similar to the bag body 20, the connecting belt 47 is formed from a woven fabric made of polyamide yarn, polyester yarn, or the like, and has a base portion in front of a region slightly below the upper and lower centers of the shield inflating portion 21. It is arranged so that it is sewn to the edge side and protrudes forward. When the inflation of the airbag 19 is completed, the connecting belt 47 is disposed substantially along the front-rear direction. The front end 47a side of the connecting belt 47 uses the mounting bracket 11 and the bolt 12 in the same manner as the mounting portion 40. Then, it is attached and fixed to the part of the front pillar portion FP in the inner panel 2. That is, in the embodiment, the airbag 19 has a position where the front edge 21c side at the time of completion of inflation in the shield inflating part 21 is located below the upper edge side of the windows W1, W2 by the connecting belt 47 (below the attachment part 40). Is connected to the front pillar portion FP side.

  Next, mounting of the head protection airbag device M of the embodiment on the vehicle V will be described. The bag body 20 in which the connecting belt 47 and the tether 45 are sewn in advance is folded from the state in which the vehicle inner wall portion 24a and the vehicle outer wall portion 24b are flatly developed. First, in the bag body 20 in a flatly unfolded state, the support inflating portions 22F and 22B are folded outward along the front-rear direction at the communication passage portions 36F and 36B (see FIG. 3). The tethers 45, 45 are arranged on the vehicle exterior side of the bag body 20 so that the tip 45b side is directed upward. Thereafter, the bag body 20 is folded together with the tethers 45, 45 so as to reduce the width in the vertical direction. Specifically, in the case of the embodiment, the region of the gas guide channel 25 is bellows folded with a plurality of folds along the front-rear direction, and the region of the protective expansion portion 28 below the gas guide channel 25 is defined. Then, folding is performed so that the lower edge 21b is wound toward the outside of the vehicle, and the folding of the bag body 20 is completed. After the folding of the airbag 19 is completed, a predetermined portion is wrapped with a wrapping material (not shown) for preventing collapse. Next, the attachment bracket 11 is attached to each attachment portion 40 and the tether 45 and the tip of the connecting belt 47. Further, the mounting bracket 15 is attached around the inflator 14 inserted into the gas inlet portion 26, and the inflator 14 is connected to the gas inlet portion 26 to form an airbag assembly.

  Thereafter, the mounting brackets 11 and 15 are arranged at predetermined positions on the inner panel 2 and fixed to the inner panel 2 using the bolts 12 and 16, and control for operating a predetermined inflator mounted on the vehicle V is performed. A lead wire (not shown) extending from the apparatus is connected to the inflator 14. After that, if the front pillar garnish 4 and the roof head lining 5 constituting the airbag cover 9 are attached to the inner panel 2 on the body 1 side, and the pillar garnishes 6 and 7 are attached to the inner panel 2 on the body 1 side, The protective airbag device M can be mounted on the vehicle V.

  Then, after the head protection airbag device M is mounted on the vehicle V, if the inflator 14 is actuated in response to an actuation signal from the control device at the time of a side collision of the vehicle V, the inflator 14 is inflated. The gas G breaks the wrapping material (not shown), pushes open the airbag cover 9 composed of the lower edges of the front pillar garnish 4 and the roof head lining 5, and protrudes downward. As shown in the chain line and FIGS. 4 to 6, the windows W1 and W2, the center pillar portion CP, and the rear pillar portion RP are greatly expanded so as to cover the inside of the vehicle.

  In the head protection airbag device M of the embodiment, in the shielding and inflating portion 21 of the airbag 19, the gas guide channel 25 and the head restraint portions 29A and 29B first complete the inflation. After the expansion of the gas guide channel 25 and the head restraint portions 29A and 29B is completed, the auxiliary expansion portion 32 in the protective expansion portion 28 and the support expansion portions 22F and 22B expand by inflating the expansion gas G into the inside. Will be.

  In the head protection airbag device M of the embodiment, the center of the airbag 19 is controlled so as to suppress the displacement in the front-rear direction with respect to the center pillar portion CP (intermediate pillar portion) of the shield inflation portion 21 when the inflation is completed. Since the support expansion portions 22F and 22B disposed on the front and rear sides of the pillar portion CP are disposed so as to protrude from the plate-shaped shield expansion portion 21 to the vehicle outer side O (see FIGS. 4 and 5), Compared with the head protecting airbag device, it is possible to ensure a large amount of protrusion of the support inflating portions 22F and 22B from the shielding inflating portion 21. In other words, in the head protection airbag device M of the embodiment, the pillar garnish 6 of the center pillar portion CP protruding from the windows W1, W2 as side windows to the vehicle inner side I and the vehicle in the support inflating portions 22F, 22B. Since it is possible to secure a large overlapping region on the inner and outer direction sides, even if the shielding / expanding portion 21 at the time of completion of the expansion moves so as to float up to the vehicle interior side I, the support expansion portions 22F and 22B are separated from the center pillar portion CP. It is possible to prevent the support inflating portions 22 </ b> F and 22 </ b> B from being lifted away from each other, and the position of the support inflating portions 22 </ b> F and 22 </ b> B can be regulated by the center pillar portion CP (the pillar garnish 6).

  Further, in the head protection airbag device M of the embodiment, the airbag 19 (the shielding inflating portion 21) is configured such that the body side member of the vehicle V is attached to the upper edge 21a side by a plurality of mounting portions 40 arranged along the front-rear direction. The front edge 21c side when the expansion is completed is connected to the front pillar portion FP side at a position lower than the upper edge side of the windows W1, W2 by the connecting belt 47. Therefore, the shield inflating portion 21 at the time of completion of the expansion is approximately in the front-rear direction from the connecting portion with the front pillar portion FP (the tip 47a of the connecting belt 47) to the mounting portion 40B on the rear end side of the upper edge. It is possible to generate the tension T along (see FIG. 4), and it is possible to accurately prevent the shield expansion portion 21 from being loosened in the front-rear direction.

  Therefore, in the head protection airbag device M according to the embodiment, the head of the occupant seated in the seat arranged in front of the center pillar portion CP causes the head restraint portion 29A to be removed when the airbag 19 is completely inflated. Even if the shielding expansion portion 21 is strongly pressed to the vehicle outer side O so as to be pressed against the vehicle outer side O, the support expansion portion 22B disposed on the rear side of the center pillar portion CP has the front side facing the center pillar. It will be supported by the pillar garnish 6 that covers the inside I of the part CP, so that the entire shield inflating part 21 can be prevented from being largely displaced forward, and the whole shield inflating part 21 can be moved to the outside of the car. Can also be suppressed. Conversely, the head of the occupant seated in the seat arranged behind the center pillar CP presses the head restraint 29B against the vehicle outer side O, so that the shield inflating unit 21 is placed on the vehicle outer side. Even when strongly pressed to O, the support expansion portion 22F disposed on the front side of the center pillar portion CP is supported by the pillar garnish 6 that covers the vehicle inner side I of the center pillar portion CP on the rear surface side. Thus, it is possible to prevent the entire shield inflating portion 21 from being greatly displaced rearward, and it is also possible to suppress the movement of the entire shield inflating portion 21 to the outside of the vehicle. As a result, the movement of the head of the occupant toward the vehicle exterior O can be accurately suppressed.

  Therefore, in the head protection airbag device M of the embodiment, the airbag 19 that has been inflated can be accurately prevented from being displaced forward and backward with respect to the center pillar portion CP as the intermediate pillar portion.

  In the head protection airbag device M of the embodiment, the support inflating portions 22F and 22B are configured to complete the inflating after the head restraining portions 29A and 29B in the shielding inflating portion 21 are completely inflated. Even during a rollover after a predetermined time has elapsed from the start of the operation of the inflator 14 that supplies the inflation gas to the inside of the bag 19, the internal pressures of the support inflation portions 22F and 22B can be secured to some extent. Therefore, even when the airbag 19 is rolled over after the inflation is completed, the support inflation portions 22F and 22B that are kept at a high internal pressure can be supported by the center pillar portion CP. However, even if the shielding expansion part 21 is strongly pressed to the vehicle outer side O, it is possible to prevent the shielding expansion part 21 from being displaced forward and backward with respect to the center pillar part CP. That is, in the head protection airbag apparatus M according to the embodiment, the portion of the shielding inflating portion 21 that restrains the occupant's head largely protrudes toward the vehicle outer side O during a rollover after a side collision. Since this can be prevented accurately, large movement of the occupant's head to the outside of the vehicle can be suppressed, and the occupant can be restrained and protected on the inside of the vehicle.

  In the head protection airbag device M of the embodiment, the airbag 19 is shielded and inflated with the support inflating portions 22F and 22B so that the airbag 19 protrudes the supporting inflating portions 22F and 22B downward from the lower edge side of the shielding inflating portion 21. The bag body 20 is formed integrally with the portion 21. The support inflating portions 22F and 22B extend from the support inflating portions 22F and 22B and are connected to the upper edge 21a of the shielding inflating portion 21. When the expansion of the bag body 20 is completed by the tether 45, the bag body 20 is pulled up from the shield inflating portion 21 to the vehicle outer side O and is arranged so as to protrude to the vehicle outer side O. Therefore, in the head protection airbag device M of the embodiment, since the support inflating portions 22F and 22B are configured integrally with the shielding inflating portion 21, the supporting inflating portion is formed separately from the shielding inflating portion, Compared with the case where it attaches to the shielding expansion part side separately, a manufacturing man-hour and cost can be reduced. In the embodiment, the length of the tether 45 is set to a dimension that allows the support inflatable portions 22F and 22B to be arranged along a substantially horizontal plane when the expansion of the bag body 20 is completed. The dimensions are not limited to this, and the support inflating portion may be arranged so that the tip is directed upward on the outside of the vehicle. Further, in the embodiment, the tip 45b side of the tether 45 is connected to the upper edge 21a side of the shielding / expanding portion 21, but the connection position of the tether to the shielding / expanding portion side is not limited to this, and the support expansion As long as the part can be lifted from the lower side of the shielding / expanding part to the vehicle exterior side, the structure may be connected to a position below the upper edge of the shielding / expanding part.

  Further, as in the airbag 19A shown in FIGS. 7 to 9, the support inflating portions 22FA and 22BA are arranged separately from the shielding inflating portion 21 so as to overlap the vehicle outer side O of the shielding inflating portion 21, A configuration may be adopted in which the peripheral portions of the communication passage portions 36FA and 36BA are connected to the shielding expansion portion 21 and communicated with the shielding expansion portion 21. If the airbag 19A has such a configuration, a tether need not be used. The airbag 19A shown in FIGS. 7 to 9 has the same configuration as the airbag 19 described above except for the shape and connection mode of the support inflating portions 22FA and 22BA. Reference numerals are assigned and detailed description is omitted.

  Moreover, it is good also as a structure which arrange | positions the resistance provision layer which improves the frictional force with respect to the center pillar part CP (pillar garnish 6) in the outer surface side of the support expansion parts 22F and 22B in the airbag 19. FIG. Specifically, an adsorption layer 50 as shown in FIG. 10 is formed as a resistance-imparting layer on at least the outer surface side of the front and rear center side portions of the support expansion portions 22F and 22B on the center pillar portion CP side. May be. The adsorption layer 50 includes a foam layer 51 made of a polymer elastic body such as urethane resin, acrylic resin, silicone rubber, styrene-butadiene rubber, and nitrile rubber. The foam layer 51 is formed on the surface side. Adsorption performance is achieved by, for example, reducing the pressure in the bubbles 51a compared to atmospheric pressure by pressing the surface side provided with the opened bubbles 51a against the pillar garnish 6 and having a large number of opened bubbles 51a. To demonstrate. The adsorption layer 50 is formed by forming a foam layer 51 on a base 52 made of a synthetic resin sheet material such as polyester, polyimide, polyvinyl chloride, polyethylene, polypropylene, etc. As shown in FIG. These are attached to predetermined positions on the vehicle interior side wall portion 24a and the vehicle exterior wall portion 24b constituting the support expansion portions 22F and 22B through an adhesive layer (not shown). Thus, if the adsorption layer 50 as a resistance imparting layer is formed on the outer surfaces of the support inflating portions 22F and 22B, the support inflating portions 22F and 22B come into contact with the pillar garnish 6 disposed inside the center pillar portion CP. After that, it is difficult to shift from the pillar garnish 6, and the support expansion portions 22F and 22B can be more accurately supported by the pillar garnish 6 (center pillar portion CP).

  In the embodiment, a two-row seat type vehicle including one intermediate pillar portion (center pillar portion CP) is described as an example, but a vehicle to which the head protection airbag device of the present invention is applicable is described. The present invention is not limited to this, and the present invention may be applied to a three-row seat type vehicle including three side windows and two intermediate pillars. When the head protection airbag device of the present invention is applied to a three-row seat type vehicle, the support inflating portions may be arranged before and after each intermediate pillar portion, respectively, and either one of the intermediate pillars It is good also as a structure arrange | positioned only before and behind a part. In the embodiment, in the airbags 19 and 19A, a portion covering the vehicle inner side of the center pillar portion CP (a portion between the support inflating portions 22F and 22B) is configured by the rear portion 29b of the head restraint portion 29A. The expansion gas is allowed to flow inside to expand, but this portion may be configured from a non-inflow portion where the expansion gas does not flow inside.

  Further, in the embodiment, the inflating shielding portions 21 and 21A in the airbags 19 and 19A include a portion that projects downward from the belt line BL when the inflating is completed. However, in the present invention, the entire inflating shielding portion is inflated. The present invention can also be applied to a type of airbag that is arranged above the belt line when completed, and even an airbag having such a configuration can accurately suppress the movement of the occupant to the outside of the eastern part of the vehicle. .

1 ... Body
2 ... Inner panel (body side member),
6 ... Center pillar garnish,
14 ... Inflator,
19, 19A ... Airbag,
20, 20A ... bag body,
21, 21 </ b> A ... expansion shield,
21a ... upper edge,
21c ... leading edge,
22F, 22B, 22FA, 22FB ... support expansion part,
45 ... Tether,
47. Connecting belt,
50 ... Adsorption layer (resistance imparting layer),
BL ... Belt line,
FP ... Front pillar part,
CP ... Center pillar part (intermediate pillar part),
V ... Vehicle,
W1, W2 ... Windows (side windows),
M: Head protection airbag device.

Claims (5)

It is mounted on a vehicle having an intermediate pillar portion in which side windows are arranged on the front and rear sides, is folded and stored on the upper edge side of the side window, and a plurality of upper edge sides are arranged along the front and rear direction at the portion of the attachment portion. It is fixedly attached to the vehicle body side member located on the upper edge side of the side window, and the inflating gas from the inflator is caused to flow into the inside of the side window including the inside of the intermediate pillar portion. A head protecting airbag device having an airbag that expands and inflates so as to cover
The airbag is
The front edge side at the time of completion of expansion is connected to the front pillar portion side disposed on the front side of the front side window at a position below the upper edge side of the side window, and
A shielded inflating portion that covers the inside of the side window at the time of completion of expansion and has a substantially plate-shaped expansion completion shape;
At the position above the belt line constituting the lower edge side of the side window at the completion of the expansion, the expansion is performed so as to protrude from the shielding expansion portion to the vehicle outer side, and is disposed on both front and rear sides of the intermediate pillar portion. A support expansion part that is position-regulated by the intermediate pillar part so as to suppress a displacement in the front-rear direction with respect to the intermediate pillar part of the shield expansion part when the expansion is completed;
A head protection airbag device characterized by comprising:   The head protection airbag device according to claim 1, wherein the support inflating part is configured to complete the inflating after the inflating of the shielding inflating part is completed. The airbag is
A bag body in which the support inflating part and the shielding inflating part are integrally configured so that the supporting inflating part protrudes downward from the lower edge side of the shielding inflating part in a flatly deployed state;
The support inflating portion extends from the side of the support inflating portion, and is connected to the upper side of the support inflating portion of the shield inflating portion. A tether that can be held to lift,
The head protection airbag device according to claim 1, wherein the head protection airbag device is provided.   The support expansion part is disposed so as to overlap the outside of the shielding expansion part and communicates with the shielding expansion part so that an expansion gas can flow into the inside. The head protection airbag device described in 1.   The head according to any one of claims 1 to 4, wherein the support inflating portion is configured by disposing a resistance imparting layer on the outer surface side so as to improve a frictional force with respect to the intermediate pillar portion. Protective airbag device.

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