JP2016101881A - Head protection airbag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head protection airbag device which successfully ensures airtightness of a bag body at the time of inflating and can suppress strong interference between the bag body and a vehicle body side member even when the bag body is configured to be arranged adjacent to the vehicle body side member at the time of inflating.SOLUTION: In an air bag 20, a bag body 21 configured to be inflated by flowing an inflation gas into the inside thereof has a proximity inflation region 39 which is positioned on an upstream side of the flow of the inflation gas and is arranged adjacent to a vehicle body side member 2 at the completion of the inflation. In addition, the air bag 20 includes a cover member 60 for covering an interference side of the proximity inflation region 39 of the bag body 21 with the vehicle body side member 2. The cover member 60 is connected to the bag body 21 by connecting a side of an upper edge 60a and a side of a lower edge 60b with a region of a non-flowing part 41 where the inflation gas is prevented from flowing in the bag body 21.SELECTED DRAWING: Figure 7

Description

  The present invention provides an airbag that is folded and stored on the upper edge side of a window on the vehicle interior side of a vehicle so that the width dimension on the vertical direction side can be reduced so that the lower edge side when the inflation is completed approaches the upper edge side. The present invention relates to a head protection airbag device having a configuration.

  Conventionally, as a head protection airbag device, an inflation gas discharged from an inflator disposed on the upper edge side of a window is caused to flow into the interior, and the airbag is moved downward from a storage part on the upper edge side of the window. As a configuration for expanding while inflating, there is a configuration in which an airbag includes a bag main body that inflates by inflating an inflating gas and a cover member that covers an outer peripheral side of a predetermined portion of the bag main body (for example, And Patent Documents 1 and 2).

JP 2011-98658 A U.S. Pat. No. 8,851,507

  However, in each of the head protection airbag devices described in Patent Documents 1 and 2, the cover member is sewn to the inflated portion of the bag main body through which the inflating gas is introduced using a suture. Therefore, in the suturing operation, a fine hole is formed in the inflated portion of the bag body, and it is inevitable that the inflation gas escapes from this hole, and the air tightness of the bag body is reduced. There was room for improvement in terms of securing.

  The present invention solves the above-mentioned problems, can ensure good airtightness of the bag body at the time of inflation, and has a configuration in which the bag body is arranged close to the vehicle body side member at the time of inflation. Another object of the present invention is to provide a head protecting airbag device capable of suppressing strong interference between the bag body and the vehicle body side member.

The head protection airbag device according to the present invention is folded on the upper edge side of the window inside the vehicle so that the width dimension on the vertical direction side can be reduced so that the lower edge side when the inflation is completed approaches the upper edge side. And an airbag configured to be deployed and inflated so as to cover the inside of the window while projecting downward while allowing the inflation gas from the inflator to flow in and to be inflated. A head protection airbag device having a configuration,
Airbag
It is configured to expand by inflating an inflow gas into the inside, and is provided with a close expansion portion that is located upstream of the flow of the expansion gas and is disposed close to the vehicle body side member when the expansion is completed. The bag body,
A cover member covering the interference side with the vehicle body side member of the proximity expansion part;
And is configured to include
The cover member is connected to the bag body by joining the upper edge side and the lower edge side to a portion of the bag body where the inflating gas does not flow into the non-inflow portion.

  In the head protection airbag device of the present invention, the bag body is positioned upstream of the flow of the inflation gas and includes a proximity inflation portion that is disposed in proximity to the vehicle body side member when inflation is completed. However, the interference side with the vehicle body side member of this close expansion part is configured to be covered by the cover member. The cover member is connected to the bag body by joining the upper edge side and the lower edge side to the bag body. Therefore, in the head protection airbag device of the present invention, when the airbag is deployed and inflated, the vehicle body side member side of the proximity inflated portion is covered with the cover member, and the cover member includes the upper edge side and the lower edge side. Since it is coupled to the bag body, even when it comes into contact with the vehicle body side member, it can be prevented from turning up, and the vehicle body side member side of the proximity expansion portion can be reliably covered. As a result, it is possible to suppress the proximity expansion portion from strongly interfering with the vehicle body side member, and the bag main body can be expanded quickly and stably. In the head protection airbag device of the present invention, since the cover member is coupled to the non-inflow portion where the inflation gas does not flow in the bag body, the cover member is temporarily sewn using a suture thread. Even if it is a structure, it can also suppress that the gas for inflation leaks from the coupling | bond part to a bag main body, and can also ensure the airtightness of a bag main body.

  Therefore, in the head protection airbag device of the present invention, the airtightness of the bag body at the time of inflation can be secured satisfactorily, and the bag body can be arranged close to the vehicle body side member at the time of inflation. The strong interference between the bag body and the vehicle body side member can be suppressed.

  Further, in the head protection airbag device of the present invention, if the cover member extends from the member constituting the bag body and is formed integrally with the bag body, the cover member is connected to the bag body. The work is simple and preferable.

Furthermore, in the head protection airbag device having the above-described configuration, a primary inflating portion that inflates by inflating an inflating gas discharged from an inflator so that the bag body can protect the occupant's head when the vehicle rolls over, A secondary inflatable portion that communicates with the primary inflatable portion and inflates later than the primary inflatable portion; and
Suppresses the inflow of inflation gas to the secondary inflation part at the early stage of expansion of the bag body in the vicinity of the communicating part that connects the primary and secondary inflation parts to the non-inflow part that joins the lower edge of the cover member It is preferable to adopt a configuration in which it is arranged at a position on the primary protection unit side.

  In the head protection airbag device having the above-described configuration, the part in the vicinity of the communicating part that communicates the primary inflating part and the secondary inflating part is covered with the cover member on the vehicle body side member side. Strong interference with the vehicle body side member can be accurately suppressed. Further, since the non-inflow portion that joins the lower edge side of the cover member is configured to be able to suppress the inflow of the inflation gas to the secondary inflatable portion side in the early stage of expansion of the bag body, the bag body In the initial stage of the expansion, the secondary expansion part can be suppressed from expanding and the primary expansion part can be rapidly expanded, and the occupant's head can be quickly protected by the primary expansion part. In addition, since the strong interference with the vehicle body side member in the vicinity of the communication portion is suppressed by the cover member, the airtightness of the portion in the vicinity of the connecting portion can be secured, and the secondary expansion portion that expands later than the primary expansion portion. The internal pressure of the vehicle can be maintained for a long time, and the passenger's head can be protected accurately even when the vehicle is rolled over.

  Furthermore, in the head protection airbag device having the above-described configuration, a mark for wrapping a tape material for preventing collapse that is wound around a folded body formed by folding the airbag is formed on the upper edge side of the cover member. When the tape material is wound around the folding completion body, the winding position can be easily observed, and the tape material can be easily wound around the folding completion body at the cover member placement position. Become. In addition, since the tape material is wound around the cover member arrangement position, the upper and lower intermediate parts of the cover member can be prevented from bumping against the bag body, and the airbag can be transported when the folding is completed. In this case, even if the intermediate part of the raising of the cover member interferes with the interference, it does not collide, and the bag body including the cover member can be maintained in a beautiful folded shape, which is preferable.

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 partially enlarged rear view showing the vicinity of a portion where a cover member is arranged in the airbag of FIG. 2. It is sectional drawing of the IV-IV site | part of FIG. FIG. 3 is a partially enlarged plan view showing a state in which the bag body and the cover member are deployed flat in the airbag of FIG. 2. In the head protection airbag device of an embodiment, it is the outline front view which looked at the state where the airbag completed inflation from the car inside. In the head protection airbag device of an embodiment, it is an outline partial expansion longitudinal section showing the state where an airbag completed inflation.

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

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

  The inflator 14 supplies inflation gas to the airbag 20, and as shown in FIG. 1, a gas cylinder (not shown) capable of discharging inflation gas to the tip side as a cylinder type whose outer shape is substantially cylindrical. A discharge port is provided. The inflator 14 inserts the distal end side including the vicinity of the gas discharge port into a connection port portion 26 described later of the airbag 20, and uses the clamp 15 disposed on the outer peripheral side of the connection port portion 26, to the airbag 20. Are connected to each other. Further, the inflator 14 uses the mounting bracket 16 that holds the inflator 14 and the bolt 17 for fixing the mounting bracket 16 to the inner panel 2 on the body 1 side, and the upper edge side of the window W2 in the inner panel 2. (See FIG. 1). The inflator 14 is electrically connected to a control device (not shown) of the vehicle V via a lead wire (not shown), and when the control device detects a side collision or rollover of the vehicle V, the inflator 14 It is configured to operate by inputting an operation signal.

  Each mounting bracket 11 is composed of two sheet metal plates, and is attached to each mounting portion 46 so as to sandwich a mounting portion 46, which will be described later, of the airbag 20 from the front and back. The mounting portions 46 are fixedly attached to the inner panel 2 on the body 1 side.

  As shown in FIGS. 2 to 4, the airbag 20 includes a bag main body 21 and a cover member 60 that is disposed so as to cover the outer surface side of the bag main body 21.

  As shown in the two-dot chain line in FIG. 1 and FIG. 6, the bag main body 21 flows inflating gas from the inflator 14 and expands it from the folded state, so that the windows W1, W2 and the windows W1, It is set as the structure expand | swelled so that the vehicle inside of the center pillar garnish 6 of the center pillar part CP arrange | positioned between W2 may be covered.

  In the case of the embodiment, the bag body 21 is manufactured by bag weaving using polyamide yarn, polyester yarn or the like. As shown in FIGS. 2 to 4, the bag main body 21 has an inflating gas inside so as to separate the vehicle inner wall portion 22 a located on the vehicle inner side I and the vehicle outer wall portion 22 b located on the vehicle outer side O when the inflation is completed. The gas inflow part 22 expand | swells by making G flow inflow, and the non-inflow part 41 which does not flow in the gas for expansion | swelling are comprised.

  Further, the bag body 21 is configured to be able to protect the occupant's head even when the vehicle V is rolled over. Specifically, in the case of the embodiment, the gas inflow portion 22 communicates with the main expansion portion 24 and a main expansion portion 24 (primary expansion portion) that expands by inflating the expansion gas discharged from the inflator 14. The sub-expansion portion 30 (secondary expansion portion) that expands later than the main expansion portion 24 and communication portions 35, 36, and 37 that connect the main expansion portion 24 and the sub-expansion portion 30 are configured. .

  The main expansion portion 24 as a primary expansion portion includes a gas guide channel 25, a connection port portion 26, a front seat protection portion 27, and a rear seat protection portion 28.

  The gas guide channel 25 is disposed over substantially the entire region before and after the region of the main inflating portion 24 so as to extend substantially along the front-rear direction on the upper edge 21 a side of the bag body 21, and is discharged from the inflator 14. The inflating gas is configured to be guided to the front seat protection part 27 and the rear seat protection part 28 disposed below the gas guide channel 25. In the case of the embodiment, the connection port portion 26 connected to the inflator 14 is a gas at a position that is substantially the center before and after the gas guide channel 25 (a position slightly shifted from the center before and after the bag body 21). It communicates with the guide channel 25 and is disposed so as to protrude upward from the gas guide channel 25. In the case of the embodiment, the connection 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 connection port part 26 will be connected with the inflator 14 by fitting the clamp 15 in the outer peripheral side in the state which inserted the inflator 14 inside. Note that, in the airbag 20 of the embodiment, a separate inner tube (not shown in the figure) for increasing heat resistance is provided at a portion from the connection port portion 26 directly below the connection port portion 26 in the gas guide channel 25. It is arranged (see FIG. 2).

  The front seat protection unit 27 is disposed on the side of the front seat when the inflation is completed, and protects the head of the occupant seated in the front seat when the airbag 20 completes the inflation in a side collision. It is a part to do. The front seat protection portion 27 is configured with a front side sub-expansion portion 31 adjacent to the front side, and the front seat protection portion 27 is connected to the front upper end side by a communication portion 35 described later. 31 is communicated. In the airbag 20 of the embodiment, in the front seat protecting portion 27 that is the main inflating portion (primary inflating portion) 24, the front upper end portion that is in the vicinity of the communicating portion 35 is on the upstream side of the flow of the inflating gas G. The proximity expansion part 39 which is located and is arranged close to the vehicle body side member when the expansion is completed is configured.

  The rear seat protection portion 28 is disposed on the side of the rear seat when the inflation is completed, and protects the head of the passenger seated in the rear seat when the airbag 20 completes the inflation in a side collision. It is a part to do.

  In the case of the embodiment, the secondary inflating portion 30 as the secondary inflating portion is adjacent to the front side secondary inflating portion 31 disposed adjacent to the front side of the front seat protecting portion 27 and the rear side of the front seat protecting portion 27. And a rear side secondary expansion part 33 arranged adjacent to the front side of the rear seat protection part 28.

  The front sub-inflatable portion 31 is disposed on the front end side of the bag body 21 so as to be adjacent to the front side of the main inflatable portion 24 (front seat protecting portion 27). The front sub-inflatable portion 31 is communicated with the front seat protecting portion 27 by a communicating portion 35 that is opened to the rear upper end side. The communication portion 35 is configured to have a small opening width dimension so as to delay the start of inflow of the inflation gas into the front side sub-expansion portion 31 with respect to the front seat protection portion 27.

  In the case of the embodiment, the center side sub-inflating part 32 is the rear side of the front seat protecting part 27 and in the region below the gas guide channel 25, the main inflating part 24 (front seat protecting part 27). It is arranged adjacent to. The center side sub-inflatable portion 32 is communicated with the front seat protection portion 27 by a communication portion 36 opened to the rear end side of the front seat protection portion 27. The communication portion 36 is also set to have a small opening width dimension, and is configured to delay the start of the flow of the inflation gas into the central side secondary inflation portion 32 relative to the front seat protection portion 27.

  In the case of the embodiment, the rear side sub-expansion portion 33 is arranged so as to fill the region below the gas guide channel 25 between the center side sub-expansion portion 32 and the rear seat protection portion 28. It is arranged adjacent to the main inflating part 24 (rear seat protection part 28). The rear sub-inflating portion 33 is communicated with the rear seat protection portion 28 by a communication portion 37 that is opened to the front lower end side of the rear seat protection portion 28. The communication portion 37 is also set to have a small opening width dimension, and is configured to delay the start of the flow of the inflation gas into the rear side sub-expansion portion 33 with respect to the rear seat protection portion 28.

  In the airbag 20 of the embodiment, when the inflation is completed, the front side sub-inflation part 31, the rear side sub-inflation part 33, and the rear seat protection part 28 project the lower end side downward from the belt line BL. The front seat protection part 27 and the center side auxiliary expansion part 32 are arranged at positions above the belt line BL (see FIG. 6).

  The non-inflow portion 41 includes a peripheral portion 42, a mounting portion 46, partition portions 48, 49, 50, thickness regulating portions 53, 54, and connecting belts 56, 57.

  The peripheral edge portion 42 constitutes the outer peripheral edge of the gas inflow portion 22, and is arranged so as to surround the periphery of the gas inflow portion 22 over the entire circumference except for the rear end 26 a side of the connection port portion 26. In the peripheral part 42, the convex part 44 and the recessed part 45 are intermittently formed in the upper edge side site | part 43 which becomes the upper edge 21a side of the bag main body 21 over the substantially front and back whole area (refer FIG. 2). Although not shown in the drawings, the convex portions 44 and the concave portions 45 are tape materials for preventing folding, which are wound around a folded body formed by folding the airbag 20 when the airbag 20 is folded. Will be wound. The convex portion 44 is formed to protrude upward in a substantially rectangular shape from the edge of the upper edge side portion 43, and constitutes a mark for winding the tape material. A tape material (not shown) having an adhesive layer over the entire surface and capable of being bonded to the folded body is wound. The concave portion 45 is formed wider than the convex portion 44 in the front-rear direction, and the end edge of the upper edge side portion 43 is formed in a substantially trapezoidal shape, and a non-woven adhesive layer is formed on the concave portion 45. A tape material (not shown) that is not provided is wound.

  The attachment part 46 is a part for attaching the airbag 20 to the inner panel 2 on the body 1 side, and as shown in FIG. 2, from the upper edge side part 43 of the peripheral part 42 on the upper edge 21 a side of the bag body 21. A plurality are arranged along the front-rear direction so as to protrude upward. In the case of the embodiment, five attachment portions 46 are arranged, and the front attachment portion 46F arranged on the front end side of the bag body 21 is attached to the front pillar portion FP as shown in FIGS. It is arranged at a position that is one step lower than the other mounting portions 46. Each mounting portion 46 is formed with a mounting hole (not shown) through which the mounting bolt 12 can be inserted.

  The partition portion 48 is disposed in the region of the gas inflow portion 22 and extends upward from the region on the lower edge side of the peripheral portion 42 so as to partition the front side sub-expansion portion 31 and the front seat protection portion 27. It is comprised as such a substantially rod shape. This partition part 48 is formed so that the terminal part 48a on the upper end side protrudes above a horizontal bar part 51 of the partition part 50 described later. The partition portion 49 is disposed as a substantially rod-like shape extending upward from the region on the lower edge side of the peripheral edge portion 42 so as to partition the center side sub-expansion portion 32 and the rear side sub-expansion portion 33. The partition part 50 constitutes the lower edge side of the gas guide flow path 25, and partitions the center side sub-expansion part 32 and the rear side sub-expansion part 33 from the gas guide flow path 25, and the rear side sub-expansion part. 33 and the rear seat protection section 28 are partitioned. The partition portion 50 includes a horizontal bar portion 51 formed so as to extend forward and backward from the upper end of the partition portion 49, and an inclined portion 52 that extends while inclining from the rear end of the horizontal bar portion 51 rearward and downward. Yes. The horizontal bar portion 51 constitutes the lower edge side of the gas guide channel 25, and divides the center side sub-expansion portion 32 and the rear side sub-expansion portion 33 from the gas guide channel 25. The inclined part 52 partitions the rear side sub-inflating part 33 and the rear seat protecting part 28. In the front end side of the horizontal bar portion 51 in the partition portion 50, the front seat protection portion 27 and the central side sub-inflatable portion 32 are inclined toward the front lower side, and the thickness of this region is regulated. Thus, the terminal part 51a made into a substantially circular shape is arranged.

  The thickness restricting portion 53 has a substantially circular outer shape, and is disposed in the vicinity of the front end of the gas guide channel 25 and at the front seat protecting portion 27 side behind the communicating portion 35. . Specifically, as shown in FIGS. 2 and 3, the thickness restricting portion 53 is located at a position about 1/3 of the length before and after the front seat protecting portion 27 from the front end of the front seat protecting portion 27. In addition, it is disposed so as to protrude above the terminal portion 48a of the partition portion 48 while providing a slight gap between the peripheral edge portion 42 and the upper edge side portion 43. The thickness regulating portion 53 suppresses the expansion of the front side sub-expansion portion 31 due to a large amount of inflation gas flowing to the communication portion 35 side (front side sub-expansion portion 31 side) when the main expansion portion 24 is expanded, And it arrange | positions in order to suppress that the site | part of the front upper side of the front seat protection part 27 comprised integrally with the gas guide flow path 25 expand | swells thickly. The thickness restricting portion 54 is formed on the lower edge side of the central side sub-inflatable portion 32 so as to protrude upward from a portion on the lower edge side of the peripheral edge portion 42.

  And in the bag main body 21 of embodiment, as shown in FIG. 2, the clearance gap between the terminal part 48a of the partition part 48 and the upper edge part 43 of the peripheral part 42 comprises the communication part 35, and the partition part 50 The gap between the terminal portion 51a and the thickness regulating portion 54 forms a communicating portion 36. In addition, a gap between the inclined portion 52 in the partition portion 50 and the lower edge side portion in the peripheral portion 42 constitutes the communication portion 37.

  In the case of the embodiment, the connecting belts 56 and 57 are arranged separately from the bag body 21 so as to extend substantially along the front-rear direction on the front end side and the rear end side of the bag body 21, respectively. The connecting belt 56 disposed on the front side is formed so as to extend forward from a position slightly above the upper and lower centers of the bag body 21. An attachment portion 56a attached to the inner panel 2 in the front pillar portion FP is formed on the front end (front end) side of the connecting belt 56. The connection belt 57 disposed on the rear side is formed to extend rearward from the rear end of the bag body 21 at a position above the front connection belt 56. An attachment portion 57 a that is attached to the inner panel 2 in the rear pillar portion RP is formed on the front end (rear end) side of the connecting belt 57.

  In the bag main body 21 of the embodiment, a portion on the upper edge side of the front seat protection portion 27 and a portion near the thickness regulating portion 53 is an inner panel as a vehicle body side member when the inflation is completed, as shown in FIG. 2, the cover member 60 covers the vehicle outer side O on the inner panel 2 side of the proximity expansion portion 39 as shown in FIGS. 2 to 4. Is arranged.

  In the case of the embodiment, as shown in FIG. 5, the cover member 60 is configured integrally with the bag body 21 so as to extend upward from the upper edge 21 a side of the bag body 21 when the bag body 21 is woven. It is arranged so as to be folded back and cover the outer side O of the bag body 21 (see FIGS. 2 to 4). Specifically, the cover member 60 has an outer shape that is a substantially rectangular shape with a wide front-rear direction side, and has a thickness restricting portion 53 and a thickness restricting portion 53 at a portion on the upper edge side of the front seat protecting portion 27. It is comprised so that the vehicle outer side O of the area | region between the attaching part 46 arrange | positioned in the rear side may be covered (refer FIG.2, 3). On the upper edge side of the cover member 60 near the front end and the vicinity of the rear end, convex portions 61, 61 for winding the tape material are arranged corresponding to the convex portion 44 formed on the upper edge 21a side of the bag body 21. The cover member 60 is formed so as to continue from the bag body 21 at the upper end portion of the convex portion 61 (see FIG. 5). Then, the cover member 60 is folded back so as to cover the vehicle outer side O of the bag main body 21, and the stitched portion 62 is formed on the upper edge 60 a side in the upper edge side portion 43 of the peripheral edge 42 over substantially the entire front and rear. In this way, the suture is sewn (coupled) using the suture, and the lower edge 60b side is sewn (coupled) using the suture so as to form the stitched portion 63 on the thickness regulating portion 53. The bag body 21 is connected.

  Next, mounting of the head protection airbag device M of the embodiment on the vehicle V will be described. First, the bag body 21 in a state where the vehicle interior side wall portion 22a and the vehicle exterior wall portion 22b are overlapped and flattened together with the cover member 60, the lower edge 21b side approaches the upper edge 21a side, and the upper and lower width dimensions. The airbag 20 is folded so as to be contracted to form a folded body (not shown). After the folding of the airbag 20 is completed, a tape material (not shown) that can be broken and is not shown is wound around the folded body.

  Thereafter, the inflator 14 to which the mounting bracket 16 has been attached is connected to the connection port portion 26 of the airbag 20 by using the clamp 15, and the mounting bracket 11 is fixed to each mounting portion 46 of the airbag 20. A bag assembly is formed.

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

  After the head protection airbag device M is mounted on the vehicle V, if the inflator 14 is activated in response to an operation signal from the control device at the time of a side collision or rollover of the vehicle V, the inflator 14 is discharged. The inflating gas flows into the bag main body 21 and the inflating bag main body 21 breaks a tape material (not shown), and further includes lower edges of the front pillar garnish 4 and the roof head lining 5. As shown in the two-dot chain line of FIG. 1 and FIG. 6, the airbag cover 9 is pushed open and expanded downward so as to cover the windows W1 and W2 and the inner side of the center pillar portion CP. . In the embodiment, in the bag body 21 of the airbag 20, first, the main inflating portion 24 (the front seat protecting portion 27, the rear seat protecting portion 28) completes the inflating, and then the sub inflating portion 30 ( The front side sub-expansion portion 31, the center side sub-expansion portion 32, and the rear side sub-expansion portion 33) complete the expansion.

  In the head protection airbag device M of the embodiment, the bag body 21 is located upstream of the flow of the inflation gas G and is disposed close to the vehicle body side member such as the inner panel 2 when the inflation is completed. Even in the configuration including the adjacent expansion portion 39, the vehicle exterior O on the interference side with the inner panel 2 of the proximity expansion portion 39 is configured to be covered by the cover member 60. The cover member 60 is coupled to the bag body 21 by joining (sewing) the upper edge 60a side and the lower edge 60b side to the bag body 21. Therefore, in the head protection airbag apparatus M of the embodiment, the vehicle exterior O on the vehicle body side member side of the proximity inflation portion 39 is covered by the cover member 60 when the airbag 20 is deployed and inflated. Since the upper edge 60a side and the lower edge 60b side are coupled to the bag body 21, the cover member 60 is prevented from turning up even when it comes into contact with the inner panel 2 that is the vehicle body side member. The vehicle body side member side (vehicle outer side O) of the close expansion part 39 can be reliably covered (see FIG. 7). As a result, it is possible to suppress the close expansion portion 39 from strongly interfering with the inner panel 2 as the vehicle body side member, and the bag main body 21 can be rapidly and stably expanded. In the head protecting airbag device M of the embodiment, the cover member 60 includes the upper edge side portion 43 and the thickness regulating portion 53 of the peripheral portion 42 that is the non-inflow portion 41 that does not allow the inflation gas to flow in the bag body 21. In addition, since it is sewn (coupled), it is possible to suppress the inflation gas from leaking from the sewn sites 62 and 63 to the bag body 21 even if the construction is sewn using a suture thread. Moreover, the airtightness of the bag body 21 can be ensured.

  Therefore, in the head protection airbag device M of the embodiment, the airtightness of the bag body 21 at the time of inflation can be ensured well, and the bag body 21 is arranged close to the vehicle body side member at the time of inflation. Even if it exists, the strong interference with the bag main body 21 and the vehicle body side member can be suppressed.

  In the head protection airbag device M of the embodiment, the cover member 60 is formed integrally with the bag body 21 by extending from the member constituting the bag body 21 when the bag body 21 is woven. Therefore, the connection work of the cover member 60 to the bag body 21 is simplified. Of course, if such a point is not taken into consideration, the cover member may be configured separately from the bag body.

  Furthermore, in the head protection airbag device M of the embodiment, the bag body 21 is configured to be able to protect the occupant's head even when the vehicle is rolled over. Specifically, the bag body 21 is communicated with the main inflating portion 24 as a primary inflating portion that inflates by inflating the inflation gas discharged from the inflator 14, and is delayed from the main inflating portion 24. And a secondary inflating portion 30 as a secondary inflating portion that inflates, and a thickness regulating portion 53 as a non-inflow portion 41 that joins the lower edge 60b side of the cover member 60 is a main inflating portion 24. In the vicinity of the communication portion 35 that allows a certain front seat protection portion 27 to communicate with the front side sub-expansion portion 31 that is the sub-expansion portion 30, the expansion gas to the front side sub-expansion portion 31 side in the early stage of expansion of the bag body 21 It is arranged at a position on the front seat protection part 27 side so that inflow can be suppressed. Therefore, in the head protection airbag device M of the embodiment, the vehicle outer side in which the portion in the vicinity of the communication portion 35 that communicates the front seat protection portion 27 and the front side sub-inflation portion 31 is on the inner panel 2 side by the cover member 60. O will be covered, and strong interference with the inner panel 2 in the vicinity of the communication portion 35 can be accurately suppressed. In addition, the thickness regulating portion 53 that joins the lower edge 60b side of the cover member 60 is configured to be able to suppress the inflow of the inflation gas to the front side secondary inflation portion 31 in the early stage of inflation of the bag body 21. Therefore, in the early stage of expansion of the bag body 21, the front sub-inflating portion 31 can be suppressed from being inflated, and the front seat protecting portion 27 can be quickly inflated. The head of the occupant can be protected quickly. Further, since the cover member 60 suppresses strong interference with the vehicle body side member in the vicinity of the communication portion 35, the airtightness of the portion in the vicinity of the communication portion 35 can be secured and is delayed from the front seat protection portion 27. The internal pressure of the inflating front side sub-inflatable portion 31 can be maintained for a long time, and the head of the occupant can be accurately protected even when the vehicle is rolled over. If such a point is not taken into consideration, an airbag having a configuration capable of protecting the head of the occupant only at the time of a side collision may be used.

  Furthermore, in the head protection airbag device M of the embodiment, a tape material for preventing collapse is wound around the completed folding body formed by folding the airbag 20 on the upper edge 21a side of the bag body 21. A convex portion 44 and a concave portion 45 are formed as marks for winding, and a convex portion 61 is disposed on the upper edge 60 a side of the cover member 60 corresponding to the convex portion 44. Therefore, when the tape material is wound around the folding completion body, the winding position can be easily observed, and the tape material can be easily wound around the folding completion body at the position where the cover member 60 is disposed. Further, since the tape material is wound around the arrangement position of the cover member 60, the upper and lower intermediate portions of the cover member 60 can be prevented from bumping against the bag body 21, and the airbag 20 at the time of folding is completed. Even when the intermediate portion of the cover member 60 raised interferes with an interference object during transportation, the bag body 21 including the cover member 60 can be maintained in a beautiful folded shape without colliding. Of course, if such a point is not taken into consideration, the mark for winding the tape material is not provided on the upper edge side of the cover member, and the tape material does not have to be wound around the portion of the cover member. It is not necessary to form a mark for winding the tape material on the upper edge side.

  In the embodiment, the cover member 60 is disposed so as to cover the vehicle outer side O of the proximity expansion portion 39 of the bag body 21 in order to suppress contact between the proximity expansion portion 39 and the inner panel 2 as the vehicle body side member. However, the cover member is not limited to the configuration that covers the outside of the bag body. For example, when an assist grip or the like as a vehicle body side member is disposed close to the vehicle inner side (the vehicle inner side of the region covered by the airbag cover) of the upstream portion of the inflating bag body, the cover member In order to suppress contact between the expansion portion and the assist grip, a configuration may be adopted in which the vehicle interior side of the close expansion portion is covered. In the embodiment, the cover member 60 is disposed on the front seat protection portion 27 side. However, a portion that is disposed in the expansion region of the rear seat protection portion in the vicinity of the vehicle body side member when the expansion is completed. If it exists, it is good also as a structure which arrange | positions a cover member in the area | region of the protection part for rear seats so that this site | part may be covered.

  DESCRIPTION OF SYMBOLS 1 ... Body, 2 ... Inner panel (vehicle body side member), 9 ... Air bag cover, 14 ... Inflator, 20 ... Air bag, 21 ... Bag main body, 22 ... Gas inflow part, 24 ... Main expansion part (primary expansion part) 27 ... Front seat protection part, 30 ... Sub-expansion part (secondary expansion part), 31 ... Front side sub-expansion part, 35 ... Communication part, 39 ... Proximal expansion part, 41 ... Non-inflow part, 42 ... Peripheral part, 43 ... upper edge side part, 44 ... convex part, 53 ... thickness regulating part, 60 ... cover member, 60a ... upper edge, 60b ... lower edge, 61 ... convex part, G ... expansion gas, W1, W2 ... window, V ... Vehicle, M ... Head protection airbag device.

Claims (4)

Folded and stored on the upper edge side of the window inside the vehicle so that the width of the vertical direction side can be reduced so that the lower edge side when the expansion is completed approaches the upper edge side, the upper edge side is the body of the vehicle. The head protection airbag device is configured to include an airbag that is mounted and fixed to the side, inflated so as to cover the inner side of the window while inflating the inflation gas from the inflator and projecting downward. And
The airbag is
It is configured to inflate by inflating an inflating gas therein, and is located on the upstream side of the flow of the inflating gas, and a close expansion portion that is disposed in close proximity to the vehicle body side member when the expansion is completed, A bag body comprising,
A cover member that covers an interference side of the proximity expansion portion with the vehicle body side member;
And is configured to include
The head is characterized in that the cover member is connected to the bag body by connecting the upper edge side and the lower edge side to a portion of the bag body where the inflating gas does not flow into the non-inflow portion. Part protection airbag device.   The head protection airbag device according to claim 1, wherein the cover member is extended from a member constituting the bag main body and formed integrally with the bag main body. A primary inflating part that inflates by inflating an inflating gas discharged from the inflator so that the bag body can protect an occupant's head when the vehicle rolls over, and the primary inflating part that communicates with the primary inflating part. And a secondary inflating part that inflates later than the inflating part.
The non-inflow portion that joins the lower edge side of the cover member is inflated toward the secondary inflatable portion in the initial stage of inflation of the bag body in the vicinity of the communicating portion that communicates the primary inflatable portion with the secondary inflatable portion. The head protection airbag device according to claim 1, wherein the head protection airbag device is disposed at a position on the primary protection portion side so that inflow of the working gas can be suppressed.   A mark for wrapping a tape material for preventing collapse that is wound around a folded body formed by folding the airbag is disposed on an upper edge side of the cover member. Item 4. The head protection airbag device according to any one of Items 1 to 3.

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