JP6769401B2 - Head protection airbag device - Google Patents

Description

According to the present invention, the vehicle is folded and stored on the upper edge side inside the vehicle, the upper edge side is attached and fixed to the body side of the vehicle, the expansion gas from the inflator is allowed to flow in, and the inside of the window is projected downward. The present invention relates to a head protection airbag device configured to include an airbag that expands and expands so as to cover it.

Conventionally, as a head protection airbag device, a tension belt arranged on the front end side of the bag body ends on the original side around an end side expansion portion arranged on the front end side of the bag body when expansion is completed. It is configured to be coupled to the front edge side of the side expansion part, inserted into a slit arranged on the rear edge side of the end side expansion part, wound around, and the tip side fixed to the body side of the vehicle. there were. When the expansion of the airbag is completed, the end-side expansion portion is arranged in a state of being pushed out to the inside of the vehicle by a tension cloth that generates tension along the front-rear direction, and is arranged inside the vehicle. The protruding end-side expansion portion protects the head of an occupant who moves diagonally forward on the outside of the vehicle even in the event of an oblique collision or an offset collision (see, for example, Patent Document 1). ..

JP 2015-85928

However, in the conventional head protection airbag device, the tension cloth is in the shape of a wide band, and the end-side expansion portion is configured to be pushed out to the inside of the vehicle over substantially the entire upper and lower parts. When airbags for passenger seats and airbags for steering wheels that are inflated in front of seats such as the passenger seat and driver's seat are placed close to each other, the lower end part when expansion is completed is There is room for improvement in that it may interfere with such an airbag and suppresses interference with an airbag that is inflated in close proximity inside the vehicle.

The present invention solves the above-mentioned problems, can suppress interference with airbags that are inflated close to each other inside the vehicle during expansion, and can be used by an occupant even during an oblique collision or an offset collision. An object of the present invention is to provide a head protection airbag device capable of accurately protecting the head.

The head protection airbag device according to the present invention is folded and stored on the upper edge side inside the vehicle, and the upper edge side is attached and fixed to the body side of the vehicle to allow expansion gas from the inflator to flow in and downward. It is equipped with an airbag that expands and expands so as to cover the inside of the car while protruding from the window.
The airbag
It has a flexible bag shape, and the upper edge side is fixed to the vehicle body side on the upper edge side of the window at a plurality of places along the front-rear direction.
A head protection airbag device having an end-side expansion portion that is arranged on the front end side at the time of completion of expansion and is partitioned from other general expansion portions by a partition portion arranged on the rear side.
The end-side expansion portion is configured so that the upper portion arranged on the upper end side when expansion is completed protrudes inside the vehicle from the lower portion arranged on the lower end side when expansion is completed.
The upper part is arranged so as to inflate the area extending from the upper rear side of the compartment to the lower front side of the compartment, and the maintenance means is used to prevent the vehicle from protruding inward when the expansion is completed. It is a structure that is maintained
The maintenance means is configured to be able to maintain an arrangement state in which the vicinity of the front upper end of the end-side expansion portion of the airbag in a flatly deployed state is displaced downward from the inside of the vehicle.

In the head protection airbag device of the present invention, when the expansion of the airbag is completed, the end-side expansion portion arranged on the front end side causes the upper portion on the upper end side to protrude inside the vehicle from the lower portion on the lower end side. In addition, the upper portion protruding inside the vehicle is arranged so as to inflate the area extending from the upper rear side of the compartment portion to the lower front side of the compartment portion. .. Therefore, in the head protection airbag device of the present invention, when the passenger airbag and the steering wheel airbag that are inflated in front of the seat are arranged close to each other inside the vehicle, the end side is inflated. The lower part arranged on the lower end side of the portion can suppress interference with this airbag, and the upper part protruding inward of the vehicle on the upper end side is the airbag expanding in front of the seat. It can be arranged so as to fill the gap between the window and the occupant's head when the occupant's head moves diagonally forward on the outside of the vehicle in the event of an oblique collision or an offset collision. It can be received by the upper part. Further, the upper portion is arranged so as to inflate the area extending from the upper rear side of the compartment portion to the lower front side of the compartment portion, and by the maintenance means, the upper portion is moved to the inside of the vehicle when the expansion is completed. Since the configuration is such that the protruding state is maintained, the protruding state toward the inside of the vehicle can be stably maintained, and the upper part that expands widely in the front-rear direction moves diagonally forward on the outside of the vehicle. It is possible to accurately catch the head of the occupant. This maintenance means is capable of maintaining an arrangement state in which the vicinity of the front upper end of the end-side expansion portion of the airbag in a flatly deployed state is displaced downward from the inside of the vehicle, and specifically, the end-side expansion portion. By extending from the front upper end side of the airbag and connecting the tip side to the body side of the vehicle so that the airbag can be inserted, the connecting belt that connects the front end side of the airbag to the body side and the front of the end side expansion portion An example includes a connecting member that directly connects the upper end side to the rear lower region of the airbag.

Therefore, the head protection airbag device of the present invention can suppress interference with airbags that are inflated in close proximity to the inside of the vehicle when inflated, and the occupant's head even during an oblique collision or an offset collision. The part can be protected accurately.

Specifically, in the head protection airbag device of the present invention, the partition portion is vertically arranged so as to partition the end side expansion portion and the general expansion portion, and the rear of the vertical bar portion. In the configuration provided with a separation portion arranged at a position equal to or higher than the upper end of the vertical bar portion, the position becomes equal to or higher than the upper end of the vertical bar portion when the expansion of the airbag is completed. Starting from the portion near the separated portion to be arranged, the upper portion arranged on the upper end side of the end side expansion portion can be bent so as to protrude inside the vehicle, and the upper side of the upper end side of the end side expansion portion can be bent. The part can be smoothly projected to the inside of the vehicle, and by adjusting the front-rear position of this separation part, the width dimension of the upper part in the front-rear direction can be easily set. ,preferable. In particular, if the separation portion is arranged above the upper end of the vertical bar portion, when the expansion of the airbag is completed, the upper end side of the vertical bar portion arranged on the front side starts from the portion near the separation portion. It is preferable that the upper portion formed so as to gradually increase the amount of protrusion toward the inside of the vehicle can be stably formed.

Further, the partition portion includes a vertical bar portion arranged substantially along the vertical direction so as to partition the end side expansion portion and the general expansion portion, and a horizontal bar portion extending rearward from the upper end of the vertical bar portion. The tip of the horizontal bar portion may be arranged at a position equal to or higher than the upper end of the vertical bar portion. In this case, the horizontal bar portion may be connected to the vertical bar portion. , It may be configured to be separated from the vertical bar portion. Even in such a configuration, when the expansion of the airbag is completed, the end side expansion starts from the portion near the tip of the horizontal bar portion located at a position equal to or higher than the upper end of the vertical bar portion. The upper part arranged on the upper end side of the portion can be bent so as to protrude inside the vehicle, and the upper portion of the end side expansion portion can be smoothly projected inside the vehicle, and the lateral side thereof. By adjusting the front-rear position of the tip of the rod portion, the width dimension of the upper portion in the front-rear direction can be easily set. In particular, if the tip of the horizontal bar is arranged above the upper end of the vertical bar, when the expansion of the airbag is completed, the tip of the horizontal bar is arranged on the front side starting from the portion near the tip of the horizontal bar. It is preferable that the upper portion formed so as to gradually increase the amount of protrusion to the inside of the vehicle toward the upper end side of the vertical bar portion can be stably formed.

Further, the compartment may be configured to be curved and extend backward from the vicinity of the lower end of the end-side expansion portion. Even in such a configuration, the compartment is configured when the expansion of the airbag is completed. The upper part on the upper end side of the end-side expansion portion can be bent so as to project inside the vehicle, and the upper part can be smoothly projected inside the vehicle, starting from the portion near the tip of the vehicle. Further, by adjusting the front-rear position of the tip of the compartment, the width dimension of the upper portion in the front-rear direction can be easily set.

It is a schematic front view which looked at the head protection airbag device which is one Embodiment of this invention from the car inside. It is a front view which shows the state which the bag main body is expanded flat in the airbag used by the head protection airbag device of embodiment. It is a front view which shows the state which the bag body was pre-folded and the connecting member was inserted into a slit in the airbag of FIG. 2 is a schematic cross-sectional view showing the vicinity of a slit portion in a state in which the bag body is pre-folded and the vicinity of a slit portion in a state in which the bag body is inflated by itself in the airbag of FIG. FIG. 5 is a partially enlarged front view showing a state in which a bag body and a connecting member are arranged side by side in the airbag of FIG. FIG. 5 is a schematic front view of the head protection airbag device of the embodiment as viewed from the inside of the vehicle showing a state in which the airbag has completed expansion. In the head protection airbag device of the embodiment, it is a partially enlarged front view seen from the inside of the vehicle which shows the state which the airbag has completed expansion. FIG. 5 is a schematic partially enlarged vertical cross-sectional view along the vertical direction showing a state in which the airbag has completed expansion in the head protection airbag device of the embodiment. FIG. 5 is a schematic partially enlarged cross-sectional view along the front-rear direction showing a state in which the airbag has completed expansion in the head protection airbag device of the embodiment. FIG. 5 is a partially enlarged front view showing a state in which the position of the tip of the horizontal bar portion in the end side compartment portion of the airbag of the embodiment is shifted forward or backward. It is a partially enlarged front view which shows the modification of the airbag of an embodiment. It is a partially enlarged front view which shows the state which the airbag of another form of this invention is unfolded flat. It is a partially enlarged front view which shows the state which the bag main body is expanded flat in the airbag of still another form of this invention. It is a partially enlarged front view which shows the state which the bag main body is expanded flat in the airbag of still another form of this invention. It is a partially enlarged front view which shows the state which the bag main body is expanded flat in the airbag of still another form of this invention.

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 double-row seat type vehicle V having two windows (side windows) W1 and W2. In the right-hand drive vehicle, the head protection airbag device M mounted on the upper edge side of the windows W1 and W2 on the right side (outside O of the vehicle) of the driver's seat DS will be described. As shown in FIG. 1, the head protection airbag device M of 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 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 inside the vehicle V, and then passes through the lower edge side of the roof side rail portion RR to the rear pillar portion RP. It is folded and stored up to the area above.

As shown in FIGS. 1, 8 and 9, the airbag cover 9 is under each of the front pillar garnish 4 arranged on the front pillar portion FP and the roof head lining 5 arranged on the roof side rail portion RR. It is composed of edges. The front pillar garnish 4 and the roof head lining 5 are made of synthetic resin, and are attached and fixed to the inside I of the inner panel 2 on the body 1 (body) side of the front pillar portion FP and the roof side rail portion RR, respectively. Has been done. Further, the airbag cover 9 is pushed by the airbag 20 in order to cover the inside of the airbag 20 which is folded and stored and to allow the airbag 20 to protrude downward inside the vehicle when expanded and expanded. It is configured so that it can be opened inside the car I (see FIGS. 8 and 9).

The inflator 14 supplies an expansion gas to the airbag 20. As shown in FIG. 1, the inflator 14 has a substantially cylindrical cylinder type, and has a gas discharge port (not shown) capable of discharging the expansion gas on the tip side. It is arranged. The inflator 14 inserts the tip side including the vicinity of the gas discharge port into the connection port 26 described later of the airbag 20, and uses a clamp 15 arranged on the outer peripheral side of the connection port 26 to insert the inflator 14 into the airbag 20. It is connected to the other. Further, the inflator 14 uses a mounting bracket 16 for holding the inflator 14 and a bolt 17 for fixing the mounting bracket 16 to the inner panel 2 on the body 1 side, so as to be above the window W2 on the inner panel 2. It is attached to the position (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 the control device detects a side collision, an oblique collision, an offset collision, a rollover, or the like of the vehicle V. At that time, it is configured to operate by inputting an operation signal from the control device.

Each mounting bracket 11 is composed of two sheet metal plates, and is mounted on each mounting portion 62, 68 so as to sandwich the mounting portions 62, 68 described later of the airbag 20 from the front and back, and bolts. 12 is used to mount and fix the mounting portions 62 and 68 to the inner panel 2 on the body 1 side (see FIGS. 1, 7 and 9).

In the case of the embodiment, the airbag 20 includes a bag main body 21 and a connecting belt 65 extending from the front end 21c side of the bag main body 21 as shown in FIGS. 2 to 5.

The bag body 21 has a flexible bag shape, and as shown in the two-point chain line in FIG. 1 and FIG. 6, the expansion gas from the inflator 14 is allowed to flow into the bag body 21 to be unfolded from the folded state. It is configured to cover the windows W1 and W2 and the car inside I of the pillar garnishes 6 and 7 of the center pillar portion CP and the rear pillar portion RP, and the outer shape is changed from the window W1 to the center pillar portion CP when the expansion is completed. , It has a substantially rectangular plate shape with the longitudinal direction substantially along the front-rear direction so that the inside of the vehicle can be covered from the front side of the rear pillar portion RP through the window W2 (see FIG. 2). Further, in the case of the embodiment, the bag body 21 is positioned so that the lower edge 21b at the time of completion of expansion is located below the belt line BL composed of the lower edges of the windows W1 and W2, as shown in FIG. The vertical width dimension is set.

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 FIG. 2, the bag body 21 has an expansion gas flowing into the bag body 21 so as to separate the car inner side wall portion 22a located on the inner side I of the car from the outer wall portion 22b located on the outer side O of the car when expansion is completed. It has an expanding portion 22 that expands by being allowed to expand, and a non-expanding portion 45 that is formed by connecting the vehicle inner side wall portion 22a and the vehicle outer wall portion 22b to prevent the expansion gas from flowing in.

In the case of the embodiment, the expansion unit 22 is a main expansion unit 24 (primary expansion) that expands by inflowing expansion gas discharged from the inflator 14 so that the head of the occupant can be protected even when the vehicle V rolls over. The front sub-expansion portion 30, the central sub-expansion portion 31, and the rear sub-expansion portion 32 (secondary expansion portion) which are communicated with the main expansion portion 24 and complete the expansion after the expansion of the main expansion portion 24 is completed. , And also has communication portions 33, 34, 35, 36 for communicating the main expansion portion 24 with the front sub-expansion portion 30, the central sub-expansion portion 31, and the rear sub-expansion portion 32, respectively. It is said that. Then, in the case of the embodiment, as shown in FIG. 2, the bag main body 21 is an end side partition portion that partitions the main expansion portion 24, the front side sub-expansion portion 30, the central side sub-expansion portion 31, and the rear side sub-expansion portion 32. Except for a small area of 47, general compartments 53, 58, and thickness regulation 60, the expansion gas G is configured to flow into the inside over substantially the entire surface to expand.

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

The gas guide flow path 25 is arranged on the upper edge 21a side of the bag body 21 so as to extend substantially along the front-rear direction over substantially the entire front and rear of the region of the main expansion portion 24, and is discharged from the inflator 14. The expansion gas G to be expanded is configured to be guided to the front seat protection portion 27 and the rear seat protection portion 28 arranged below the gas guide flow path 25. A connection port 26 connected to the inflator 14 is communicated with the gas guide flow path 25 at substantially the center of the front and rear of the gas guide flow path 25 (a position slightly rearward of the center of the front and rear of the bag body 21). It is arranged so as to project upward from the gas guide flow path 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 flow path 25, and the rear end 26a side is opened so that the inflator 14 can be inserted. The connection port 26 is connected to the inflator 14 by fitting the clamp 15 on the outer peripheral side with the inflator 14 inserted inside. 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 26 to directly below the connection port 26 in the gas guide flow path 25. , (See FIG. 2).

The front seat protection unit 27 is arranged on the side of the front seat (driver's seat DS) when the expansion is completed, and when the airbag 20 completes the expansion at the time of a side collision, the front seat (driver's seat DS) ) Is a part for protecting the head H of the occupant P (driver). The rear seat protection unit 28 is arranged on the side of the rear seat when the expansion is completed, and protects the head of the occupant seated in the rear seat when the airbag 20 completes the expansion in the event of a side collision. It is a part to do.

The front sub-expansion portion 30 is arranged on the front end 21c side of the bag body 21 so as to be adjacent to the front side of the main expansion portion 24 (front seat protection portion 27), and is the airbag 20 (bag body) of the embodiment. In 21), the front sub-expanding portion 30 arranged on the front end 21c side constitutes the end-side expanding portion 38. The front sub-expansion portion 30 is partitioned from the front seat protection portion 27 adjacent to the rear side by an end-side partition portion 47 arranged on the rear side, and the expansion completion shape is substantially shown in the vertical direction. It is said to be roughly rod-shaped along. In the case of the embodiment, the front sub-expansion portion 30 is configured to extend downward from the belt line BL and position the lower end side below the front seat protection portion 27 when the expansion is completed. Further, the front sub-expansion portion 30 is communicated with the front seat protection portion 27 by a communication portion 33 opened on the rear upper end side and a communication portion 34 opened on the rear lower end side. These communication portions 33 and 34 are configured so that the opening width dimension is set small so that the start of inflow of expansion gas into the front side sub-expansion portion 30 is delayed as compared with the front seat protection portion 27. ..

In the case of the embodiment, the central sub-expansion portion 31 is located between the front seat protection portion 27 and the rear seat protection portion 28 in the main expansion portion 24, and is arranged in the area below the gas guide flow path 25. As a result, it is arranged adjacent to the front seat protection portion 27 in the main expansion portion 24. The central side sub-expansion portion 31 is communicated with the front seat protection portion 27 by a communication portion 35 opened on the rear end side of the front seat protection portion 27. The communication portion 35 is also set to have a small opening width dimension, and is configured to delay the start of inflow of expansion gas into the central side sub-expansion portion 31 as compared with the front seat protection portion 27. The rear side sub-expansion portion 32 is arranged in the area on the rear lower edge side of the central side sub-expansion portion 31 on the front end side of the rear seat protection portion 28, and is arranged on the rear seat protection portion 28 in the main expansion portion 24. They are placed adjacent to each other. The rear sub-expansion portion 32 is communicated with the rear seat protection portion 28 by a communication portion 36 opened on the front lower end side of the rear seat protection portion 28. The communication portion 36 is also set to have a small opening width dimension, and is configured to delay the start of inflow of expansion gas into the rear side sub-expansion portion 32 as compared with the rear seat protection portion 28.

In the bag body 21 of the embodiment, the front sub-expanding portion 30 constitutes an end-side expanding portion 38 arranged on the front end 21c side of the bag main body 21, and the end-side expanding portion 38 (front sub-expanding portion) in the expanding portion 22. A portion other than 30) constitutes the general expansion portion 43. The end-side expansion portion 38 is partitioned by the end-side partition portion 47 from the front seat protection portion 27 constituting the general expansion portion 43. In the case of the embodiment, the end-side partition portion 47 is formed separately from the peripheral edge portion 46, and substantially along the vertical direction so as to partition the end-side expansion portion 38 and the general expansion portion 43, as will be described later. The vertical bar portion 48 is arranged so as to be provided with a horizontal bar portion 49 extending rearward and upward from the upper end 48a of the vertical bar portion 48. Then, the end-side expansion portion 38 has a communication portion 33 formed between the tip end (rear end 49a) of the horizontal bar portion 49 and the peripheral edge portion 46, and a vertical bar, respectively, on the upper end 38a side and the lower end 38b side. It communicates with the front seat protection portion 27 via a communication portion 34 formed between the lower end 48b of the portion 48 and the peripheral edge portion 46.

More specifically, the end-side expansion portion 38 is arranged on the upper end 38a side and is composed of the upper region of the end-side compartment 47, and is arranged on the lower end 38b side and is the end-side compartment 47. The upper portion 39 is configured to be wider in the front-rear direction than the lower portion 40, with the lower portion 40 composed of the front region of the vertical bar portion 48 in the above. .. Then, in the embodiment, when the expansion of the bag body 21 is completed, the upper portion 39 is pulled by the connecting belt 65 as a maintenance means and is arranged so as to project toward the car inside I from the lower portion 40. .. More specifically, the end-side expansion portion 38 includes an upper portion 39 and an upper region 40a (a region arranged on the front side of the vertical bar portion 48) in the lower portion 40 on the upper end 38a side when expansion is completed. The vehicle inside protrusion 41 is configured so as to overlap the vehicles inside and outside the vehicle. The upper portion 39 arranged so as to project to the inside I of the vehicle when the expansion of the bag body 21 is completed is arranged in a region extending back and forth from the vertical bar portion 48, that is, the upper portion 39 (vehicle). When the expansion of the bag body 21 is completed, the inner protruding portion 41) is arranged so as to inflate the region extending from the upper rear side of the vertical bar portion 48 in the end side compartment 47 to the lower front side of the vertical bar portion 48. (See FIG. 7). Further, the car inside protrusion 41 is formed above the slit 51 formed in the vertical bar portion 48, which will be described later. Specifically, when the expansion of the bag body 21 is completed, the upper portion 39 is bent with respect to the lower portion 40 with the portion near the rear end (the portion of the communication portion 33) as the starting point XP, and the end side. The region above the slit 51 in the expansion portion 38 is arranged so as to project to the vehicle inside I so as to form the vehicle inside protrusion 41.

Specifically, in the airbag 20 (bag body 21) of the embodiment, as shown in FIG. 5, the distance between the rear end 49a of the horizontal bar portion 49 in the end side compartment 47 and the upper edge side portion in the peripheral portion 46 is separated. The distance D1 is set to about 1/2 of the separation distance D2 between the upper end 48a of the vertical bar portion 48 in the end side partition 47 and the upper edge side portion in the peripheral edge 46, and this separation distance D2 is the end side division. It is smaller than the separation distance D3 between the upper end 48a of the vertical bar portion 48 in the portion 47 and the front edge side portion in the peripheral portion 46, and is set to about 4/7 of this separation distance D3. Further, in the case of the embodiment, the separation distance D3 is smaller than the length dimension L on the front-rear side of the horizontal bar portion 49 in the end-side compartment portion 47, and is set to about 5/7 of this length dimension L. ..

Further, when the expansion of the airbag 20 is completed, the end side expansion portion 38 is arranged so that the lower end 38b side is projected downward from the belt line BL (see FIGS. 6 to 8). Further, in a state where the airbag 77 for the steering wheel mounted on the steering wheel 75 in front of the driver's seat DS has completed expansion, the end-side expansion portion 38 covers the lower portion 40 on the lower end 38b side. It expands so as to overlap the airbag 77 for the steering wheel on the left-right direction side (inside / outside direction side of the vehicle) (see FIGS. 6, 7 and 9).

The non-expanding portion 45 includes a peripheral edge portion 46 constituting the outer peripheral edge of the expanding portion 22, an end side partition portion 47 arranged in the region of the expanding portion 22, general compartments 53, 58, and a thickness regulating portion 60. A mounting portion 62 for mounting the upper edge 21a side of the bag body 21 to the body 1 side of the vehicle V is provided.

The peripheral edge portion 46 is arranged so as to surround the periphery of the expansion portion 22 over the entire circumference except for the rear end 26a side of the connection port portion 26.

The end-side compartment 47 partitions the front sub-expansion portion 30 and the front seat protection portion 27 (the end-side expansion portion 38 and the general expansion portion 43), and in the case of the embodiment, the upper and lower end sides are divided. , It is configured to be separated from the peripheral portion 46. As described above, the end side compartment 47 is arranged substantially along the vertical bar portion 48 and the vertical bar portion 48 so as to extend rearward and upward from the upper end 48a of the vertical bar portion 48. It is configured to include a horizontal bar portion 49. In the case of the embodiment, the vertical bar portion 48 is configured to be substantially linearly inclined with respect to the vertical direction so that the lower end 48b is located slightly in front of the upper end 48a, and the horizontal bar portion 49 is formed. It is configured to be substantially linear and inclined rearward in the front-rear direction so that the tip (rear end 49a) is located above the upper end 48a of the vertical bar portion 48. The horizontal bar portion 49 is configured so that the rear end 49a protrudes upward from the upper horizontal bar portion 56 of the general section 53. A slit 51 through which the connecting belt 65 can be inserted is formed in the vertical bar portion 48 of the end side partition portion 47. The slit 51 is formed so as to make a notch substantially along the vertical direction at a position slightly above the upper and lower centers of the bag body 21. Further, the length of the slit 51 is set so that only the main body 66 of the connecting belt 65 can be inserted, and the connecting piece 67 on the base 66a side of the main body 66 cannot be inserted.

The general compartments 53 and 58 are arranged in the area of the general expansion portion 43, and the general expansion portion 43 is divided into the gas guide flow path 25, the front seat protection portion 27, the rear seat protection portion 28, and the central side sub-expansion. It is divided into a portion 31 and a rear side sub-expansion portion 32. Specifically, the general compartment 53 extends rearward from the lower edge side portion of the peripheral edge 46 along the front-rear direction to partition the central sub-expansion portion 31 and the rear sub-expansion portion 32. 54, a vertical bar portion 55 extending upward from the rear end of the lower horizontal bar portion 54 along the vertical direction to partition the central side sub-expansion portion 31 and the rear seat protection portion 28, and the vertical bar portion 55. It is provided with an upper horizontal bar portion 56 extending forward from the upper end along the front-rear direction to partition the gas guide flow path 25 and the central side sub-expansion portion 31. In the region below the front end 56a of the upper horizontal bar portion 56, the general compartment portion 58 extends from the lower edge side portion of the peripheral edge portion 46 toward the rear and upper side, and is bent so as to have the tip directed downward to the front. The area on the lower edge side of the seat protection portion 27 and the central side sub-expansion portion 31 is partitioned.

The thickness regulating portion 60 is formed so as to project upward from the lower edge side of the peripheral edge portion 46 in the vicinity of the boundary portion between the rear side sub-expanding portion 32 and the rear seat protection portion 28. Then, in the airbag 20 of the embodiment, the gap between the rear end 49a of the horizontal bar portion 49 and the upper edge side of the peripheral edge portion 46 in the end side partition portion 47 constitutes the communication portion 33, and the end side compartment portion 47. The gap between the lower end 48b of the vertical bar portion 48 and the lower edge side of the peripheral edge portion 46 constitutes the communication portion 34. Further, the gap between the front end 56a of the upper horizontal bar portion 56 in the general section 53 and the general section 58 constitutes the communication portion 35, and the thickness is different from the rear end of the lower horizontal bar 54 in the general section 53. The gap between the regulation unit 60 and the regulation unit 60 constitutes the communication unit 36.

A plurality of mounting portions 62 are arranged along the front-rear direction on the upper edge 21a side of the bag main body 21, and are formed at four locations in the case of the embodiment. The mounting portion 62 is fixed to the inner panel 2 on the body 1 side at the portion of the roof side rail portion RR by using the mounting bracket 11 and the mounting bolt 12. Specifically, the mounting portion 62 is When the expansion of the airbag 20 is completed, the area of the end side expansion portion 38 (front side sub-expansion portion 30) is covered so as not to prevent the upper portion 39 on the upper end 38a side of the end side expansion portion 38 from protruding into the vehicle inside. , Not placed. That is, in the airbag 20 of the embodiment, the mounting portion 62 is arranged in the region of the end side partition portion 47 on the rear side of the rear end 49a of the horizontal bar portion 49. Each mounting portion 62 is formed with a mounting hole 62a for inserting the mounting bolt 12.

When the expansion of the bag body 21 is completed, the connecting belt 65 extends from the front end 21c side of the bag body 21 and is fixed to the body 1 side of the vehicle V. In the case of the embodiment, when the expansion of the bag body 21 is completed. A maintenance means for maintaining the protruding state of the upper portion 39 (car inside protrusion 41) toward the inside of the car is also configured. The connecting belt 65 is made of a flexible sheet body, and in the case of the embodiment, it is made of a woven fabric made of a polyamide thread, a polyester thread, or the like. The connecting belt 65 is arranged so that the vicinity of the front upper end of the end-side expansion portion 38 of the airbag 20 in the flatly deployed state is brought closer to the inside rear and the lower side of the vehicle, even when the expansion of the bag body 21 is completed. As a maintainable means, when the expansion of the bag body 21 is completed, a maintenance means for maintaining the protruding state of the upper portion 39 (car inside protrusion 41) toward the inside of the vehicle is configured. Specifically, the original portion side. Is connected to the bag body 21 and the tip side is fixed to the body 1 side of the vehicle V on the peripheral edge of the window W1. When the expansion of the airbag 20 is completed, the car outside O of the lower portion 40 of the end side expansion portion 38 , It is a configuration that is arranged substantially along the front-rear direction. The connecting belt 65 includes a band-shaped main body 66 inserted through the slit 51, a connecting piece 67 formed on the base 66a side of the main body 66 and coupled to the bag main body 21 side, and a tip 66b side of the main body 66. It is provided with a mounting portion 68 formed in the above. The connecting piece 67 is formed so as to be wider than the main body 66 and project vertically from the main body 66. That is, the coupling piece 67 is made wider than the slit 51 so that the slit 51 cannot be inserted. Similar to the mounting portion 62 formed on the bag body 21, the mounting portion 68 utilizes the mounting bracket 11 and the mounting bolt 12 to form an inner on the body 1 side at the front pillar portion FP portion that is the peripheral edge of the window W1. It is fixed to the panel 2 and has a mounting hole 68a through which the mounting bolt 12 can be inserted.

In the connecting belt 65, with the bag body 21 unfolded flat, as shown in FIG. 2, the connecting piece 67 is attached to the front upper corner portion 46a (upper side of the end side expansion portion 38) of the peripheral edge portion 46 of the bag body 21. The main body 66 is sewn (bonded) to the front edge 39a side of the portion 39) and is arranged so as to extend upward from the coupling piece 67 so as to extend substantially along the vertical direction. Specifically, the coupling piece 67 is superposed on the vehicle outer side O (vehicle outer wall portion 22b side) of the bag body 21. Then, as shown in A of FIGS. 3 and 4, the connecting belt 65 is folded back on the upper front edge side of the bag body 21 to the inside of the vehicle, and the main body 66 is passed through the slit 51 from the inside I of the vehicle to the outside O of the vehicle. It is inserted and folded together with the bag body 21 in a state of being arranged so as to cover the car outside O of the lower portion 40 of the end side expansion portion 38. At this time, as shown in FIG. 2, the bag main body 21 rises rearward so as to bring the region near the front upper end of the end side expansion portion 38 (the front edge 39a side of the upper portion 39) closer to the rear and lower sides inside the vehicle. It will be folded back so as to overlap the inner side wall portion 22a side of the vehicle with the folding line CL inclined to. Specifically, the upper edge side of the end-side expansion portion 38 (upper edge 46b of the peripheral edge portion 46) is arranged at a position substantially coincident with the slit 51 so as to substantially follow the slit 51 in the vertical direction. (See Fig. 3). Further, at this time, as shown in A of FIG. 4, the connecting belt 65 itself exposes the connecting piece 67 to the car inside I, and the slit 51 is a portion of the main body 66 on the base side near the connecting piece 67. The portion of the main body 66, which is arranged on the car outside O of the end-side expansion 38, is substantially aligned in the front-rear direction so that the mounting portion 68 is directed forward by being inserted into and inverted. , Will be placed. The length dimension of the connecting belt 65 (the length dimension of the main body portion 66) is such that when the expansion of the bag main body 21 is completed when the bag main body 21 is mounted on the vehicle, tension is generated substantially along the main body portion 66 and in front of the end side expansion portion 38. Maintaining the arrangement state in which the vicinity of the upper end (the front edge 39a side of the upper portion 39) is displaced downward from the inside of the vehicle, the front upper end side (front of the upper portion 39) of the end side expansion portion 38 to which the coupling piece 67 is connected is maintained. The region on the edge 39a side) is set to a dimension that allows pressure contact with the car inside surface of the lower portion 40 of the end side expansion portion 38.

When the expansion of the bag body 21 is completed, the connecting belt 65 projects the upper portion 39 on the upper end 38a side of the end-side expansion portion 38 toward the inside of the vehicle, and in the main body 66, the lower portion of the end-side expansion portion 38. The parts arranged on the outside of the vehicle 40 are arranged so as to substantially follow the front-rear direction. In the bag body 21 of the embodiment, in the end-side partition portion 47 that partitions the end-side expansion portion 38 and the general expansion portion 43, the horizontal bar portion 49 is arranged so as to be inclined rearward, and the rear end 49a is arranged. The side portion is configured so as to minimize the separation distance D1 from the peripheral edge portion 46. In other words, the portion of the end-side expansion portion 38 on the rear end side of the upper portion 39 is the narrowest. Therefore, at this time, the end-side expansion portion 38 is located near the rear end 49a of the horizontal bar portion 49 (near the communication portion 33, that is, the upper side of the end-side expansion portion 38), which is behind the folding line CL at the time of folding and storing. (Near the rear end of the portion 39) is bent with the starting point XP as the starting point XP, and the upper portion 39 is arranged so as to protrude inward of the vehicle over the entire front and rear (see FIG. 7). Further, the connecting belt 65 has a configuration in which the connecting piece 67 on the base portion side is coupled to the peripheral edge portion 46 constituting the non-expanding portion 45 in the bag main body 21, and when the expansion of the bag main body 21 is completed, the main body portion 66 Due to the tension generated along the above, the front upper corner portion 46a of the peripheral edge portion 46 connecting the coupling piece 67 is bent with respect to the end side expansion portion 38 (upper portion 39), and the vehicle of the upper portion 39 It will be folded into the outer side O and arranged (see B in FIG. 4). That is, the connecting belt 65 has a mode in which the connecting piece 67 on the original portion side is also covered with the upper portion 39 of the end side expanding portion 38 (see FIG. 7), and the connecting piece 67 is viewed from the vertical direction side. It will be arranged in a straight line substantially along the front-rear direction (see B in FIG. 4 and FIG. 9). At this time, strictly speaking, the end-side expansion portion 38 eliminates the fold of the folding line CL at the time of folding and storing, and the upper portion 39 and the upper region 40a of the lower portion 40 form a large chamber in one chamber. (See FIG. 8), the upper edge 46b of the peripheral edge portion 46 constituting the upper edge side is inverted, and the expansion region is arranged inside the vehicle, so that the car inside protrusion 41 Will be arranged so as to protrude inside the vehicle.

Further, in the vehicle V equipped with the head protection airbag device M of the embodiment, the steering wheel 75 arranged in front of the driver's seat DS is a steering wheel that operates when an impact force is applied from the front side of the vehicle V. The airbag device 76 for the vehicle is mounted (see FIG. 1). The airbag device 76 includes an airbag 77 that is folded and stored in the boss portion 75a of the steering wheel 75, and an inflator (not shown) that supplies expansion gas to the airbag 77. When an impact force is applied from the front, including at the time of an oblique collision or an offset collision, the expansion gas flows into the inside and expands so as to cover the entire upper surface side of the ring portion 75b of the steering wheel 75. (See the two-point chain line in FIGS. 6 and 7 and FIGS. 8 and 9).

Next, mounting of the head protection airbag device M of the embodiment on the vehicle V will be described. First, the bag main body 21 in a state where the car inner side wall portion 22a and the car outer wall portion 22b are flatly deployed is inserted into the slit 51 through the main body portion 66 of the connecting belt 65, and the front upper edge side of the end side expansion portion 38 ( The region of the front edge 39a side of the upper portion 39 is folded back so as to overlap the vehicle inner side wall portion 22a side at the portion of the folding line CL (see FIG. 2), in other words, the vicinity of the front upper end of the end side expansion portion 38. Arrange them so that they approach the rear and lower parts of the car, and pre-fold them as shown in FIG. Then, while maintaining this pre-folded state, the bag body 21 is folded so that the lower edge 21b side approaches the upper edge 21a side, and the airbag 20 is folded. In the embodiment, although detailed illustration is omitted, in the bag body 21, the portion of the gas guide flow path 25 on the upper edge 21a side is bellows-folded with a plurality of creases along the front-rear direction. The region below the gas guide flow path 25 is folded by roll folding so as to wind from the lower edge 21b side toward the outside of the vehicle. After the folding of the airbag 20 is completed, a predetermined portion of the folded airbag 20 is wrapped with a wrapping material for preventing collapse (not shown) that can be broken.

After that, the inflator 14 to which the mounting bracket 16 has been mounted is connected to the connection port 26 of the airbag 20 by using the clamp 15, and the mounting portion 68 of the connecting belt 65, the mounting portion 62 of the bag body 21 and the mounting portion 62 The mounting brackets 11 are fixed to each to form an airbag assembly.

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

After the head protection airbag device M of the embodiment is mounted on the vehicle V, the inflator receives an operation signal from the control device at the time of a side collision, an oblique collision, an offset collision, or a rollover of the vehicle V. When 14 is activated, the expansion gas discharged from the inflator 14 flows into the bag body 21, and the expanding bag body 21 breaks the wrapping material (not shown), and further, the front pillar garnish 4 and the roof. The airbag cover 9 composed of the lower edge of the head lining 5 is pushed open, and while projecting downward, the windows W1 and W2, the center pillar portion CP, as shown in the two-point chain line in FIG. 1 and FIGS. In addition, the rear pillar portion RP is greatly expanded so as to cover the inside of the vehicle. Further, the airbag device 76 for the steering wheel mounted on the steering wheel 75 in front of the driver's seat DS at the time of an oblique collision or an offset collision is also shown in the two-point chain lines of FIGS. 1, 6 and 7 and FIGS. 8 and 9. As described above, the airbag 77 is operated to inflate. In the embodiment, since the bag main body 21 is folded by roll folding so as to wind from the lower edge 21b side toward the outside of the vehicle, the main body portion 66 of the connecting belt 65 is not shown in detail. When the expansion of the bag body 21 is completed, the bag body 21 is arranged in a twisted state.

Then, in the head protection airbag device M of the embodiment, when the expansion of the airbag 20 is completed, the end-side expansion portion 38 arranged on the front end 21c side makes the upper portion 39 on the upper end 38a side lower than the lower end 38b side. It is arranged so as to protrude to the inside of the vehicle from the side portion 40, and the upper portion 39 projecting to the inside of the vehicle is a vertical bar from the rear upper side of the vertical bar portion 48 in the end side section 47. The configuration is such that the region to be applied to the lower front side of the portion 48 is inflated. Therefore, in the head protection airbag device M of the embodiment, the airbag 77 for the steering wheel, which is inflated in front of the driver's seat DS (seat), is close to each other inside the vehicle as shown in FIGS. The lower end 38b side portion (lower side portion 40) of the end side expansion portion 38 can be suppressed from interfering with the airbag 77, and protrudes inward of the vehicle on the upper end side 38a side. The upper portion 39 (specifically, the vehicle inner protrusion 41 composed of the upper portion 39 and the upper region 40a of the lower portion 40) is formed by the airbag 77 and the window W1 inflated in front of the driver's seat DS. It can be arranged so as to fill the gap between the spaces, and when the head H of the driver P as a occupant moves diagonally forward on the outside of the vehicle in the event of an oblique collision or an offset collision. The head H can be received by the upper portion 39. Further, the upper portion 39 (car inside protrusion 41) is arranged so as to expand a region extending from the upper rear side of the vertical bar portion 48 to the lower front side of the vertical bar portion 48, and is arranged. Since the connecting belt 65 as a maintenance means maintains the protruding state toward the car inside I when the expansion is completed, the protruding state toward the car inside I can be stably maintained, and the front and rear The wide-expanded upper portion 39 (car inside protrusion 41) can accurately catch the head H of the occupant P moving diagonally forward on the outside of the vehicle.

Specifically, in the head protection airbag device M of the embodiment, the connecting belt 65 as a maintenance means extends from the front upper end side (the front edge 39a side of the upper portion 39) of the end side expansion portion 38 and is a bag. The slit 51 formed in the end side section 47 of the main body 21 is arranged so as to cover the car outside O of the end side expansion portion 38 in a state of being inserted from the car inside I to the car outside O, and the tip side is , It is a configuration fixed to the inner panel 2 on the body side. Therefore, when the expansion of the bag body 21 is completed, the tension generated substantially along the body portion 66 of the connecting belt 65 causes the front upper end side of the end side expansion portion 38 to which the coupling piece 67 is coupled (the front edge of the upper portion 39). The region on the 39a side) is pressed against the car-inner surface of the lower portion 40 of the end-side expansion portion 38, and the upper portion 39 (car-inside protrusion 41) protrudes toward the car inside I (end-side expansion portion). The configuration is such that the front upper end side of 38 (displaced state downward inside the vehicle) can be maintained. Further, in the head protection airbag device M of this embodiment, the main body portion 66 of the connecting belt 65 is arranged on the vehicle outside O of the lower portion 40 of the end side expansion portion 38 via the slit 51. Therefore, the region on the lower end 38b side of the end-side expansion portion 38 (the region below the slit 51 in the lower portion 40) is not easily affected by the connecting belt 65, and the protrusion to the car inside I is suppressed. Become.

Therefore, in the head protection airbag device M of the embodiment, it is possible to suppress interference with the airbag 77 that is inflated close to the inside of the vehicle at the time of expansion, and also at the time of an oblique collision or an offset collision. It is possible to accurately protect the head H of the driver P as a vehicle.

Further, in the head protection airbag device M of the embodiment, since the end side expansion portion 38 is configured to position the lower end 38b side when the expansion is completed below the belt line BL, the upper end side 38a side. When the head H of the occupant P moving diagonally forward on the outside of the vehicle is received by the portion (projecting on the inside of the vehicle 41), the lower end 38b side is below the belt line BL and inside the vehicle W1. It can be supported by a member such as a door trim that is arranged so as to project from the occupant, and the head H of the occupant P can be restrained more accurately.

In the head protection airbag device M of the embodiment, the front end 21c side of the bag body 21 is set to the body 1 side of the vehicle V as a maintenance means for maintaining the projecting state of the vehicle inside projecting portion 41 toward the vehicle inside when the expansion is completed. Using the connecting belt 65 to be connected, the front upper end side (front upper edge side in the peripheral edge portion 46) of the end side expansion portion 38 is indirectly covered with the rear lower region (longitudinal end side partition portion 47) of the bag body 21. Although the structure is connected to the rod portion 48), the maintenance means is not limited to the embodiment, and the front end 21c side of the bag body 21 is on the body side as in the airbag 20A shown in FIG. A connecting belt 79 to be connected is separately arranged, and the front upper end side (front upper edge side in the peripheral edge portion 46) of the end side expansion portion 38 is directly placed in the rear lower region (vertical bar of the end side partition portion 47) in the bag body 21. By connecting (sewing) to the portion 48), the coupling portion 80 is used as a maintenance means, and a protruding state toward the inside of the vehicle when the expansion is completed (a state of being displaced downward inside the vehicle near the front upper end of the end side expansion portion 38). ) May be maintained.

Further, in the head protection airbag device M of the embodiment, the end side partition portion 47 that partitions the end side expansion portion 38 and the general expansion portion 43 partitions the end side expansion portion 38 and the general expansion portion 43. A vertical bar portion 48 that is arranged substantially along the vertical direction and a horizontal bar portion 49 that extends rearward from the upper end 48a of the vertical bar portion 48 are provided. Therefore, when the expansion of the airbag 20 is completed, the upper portion 39 of the end-side expansion portion 38 projects toward the car inside I starting from the portion near the tip (rear end 49a) of the horizontal bar portion 49 (near the communication portion 33). It is possible to smoothly project the upper end 38a side (upper side portion 39) of the end side expansion portion 38 to the inside of the vehicle. Further, in the head protection airbag device M of the embodiment, the width dimension of the vehicle inside protrusion 41 on the front-rear direction side can be easily set by adjusting the front-rear position of the rear end 49a of the horizontal bar portion 49. can do. Specifically, as shown in FIG. 10A, if the end side partition portion 47F is configured so that the rear end 49a of the horizontal bar portion 49F is shifted to the front side as compared with the horizontal bar portion 49 (horizontal bar). (If the length dimension of the portion 49F is shortened), the width dimension of the upper portion in the front-rear direction can be reduced, and conversely, as shown in B of FIG. 10, the horizontal bar portion is formed as the end side partition portion 47R. If the rear end 49a of the 49R is configured to be displaced to the rear side as compared with the horizontal bar portion 49 (if the length dimension of the horizontal bar portion 49R is lengthened), the width dimension of the upper portion in the front-rear direction can be increased. Can be made larger. Such adjustments can be made as appropriate depending on the vehicle. Further, the arrangement position, the amount of protrusion, the size, etc. of the upper portion (the protruding portion inside the vehicle) can be appropriately changed by changing the separation distance from the peripheral edge portion of the end side compartment portion. For example, if the separation distance D2 between the upper end 48a of the vertical bar portion 48 and the upper edge side portion of the peripheral edge portion 46 and the separation distance D3 between the upper end 48a of the vertical bar portion 48 and the front edge side portion of the peripheral edge portion 46 are set large, When the expansion is completed, the area on the front side of the upper portion (car inside protrusion) can be expanded thickly, and if the separation distance D1 between the rear end 49a of the horizontal bar portion 49 and the upper edge portion on the peripheral portion 46 is increased. When the expansion is completed, the area on the rear side of the upper portion (car inside protrusion) can be expanded thickly. Then, if the length dimension of the horizontal bar portion 49 on the front-rear direction side is increased, the width dimension of the upper portion (car inside protrusion) on the front-rear direction side can be increased when the expansion is completed.

In addition, if such a point is not taken into consideration, it is possible to use a structure having only a vertical bar portion and no horizontal bar portion as the end side partition portion, and in the case of such a configuration. By changing the angle of the folding line when the airbag is folded and stored, the width dimension of the upper portion in the front-rear direction when the expansion is completed can be changed as appropriate.

In particular, in the head protection airbag device M of the embodiment, the end side partition portion 47 arranges the tip end (rear end 49a) of the horizontal bar portion 49 above the upper end 48a of the vertical bar portion 48. Therefore, when the expansion of the airbag 20 is completed, the amount of protrusion toward the car inside I toward the upper end 48a side of the vertical bar portion 48 arranged on the front side is set from the portion near the rear end 49a of the horizontal bar portion 49 as the starting point XP. The upper portion 49, which is configured to be gradually increased, can be stably formed. That is, in the head protection airbag device M of the embodiment, when the expansion of the airbag 20 is completed, the vehicle inside protrusion 41 is configured to increase the amount of protrusion toward the front end side. Become. Further, with such a configuration, the upper portion 39 can be reliably bent so as to protrude inward of the vehicle from the portion near the rear end 49a of the horizontal bar portion 49 as the starting point XP. If such a point is not taken into consideration, as the end side partition portion 47', the horizontal bar portion 49' is configured to substantially follow the front-rear direction as shown in FIG. 11, and the rear end 49a is vertically arranged. It may be configured to be arranged at the same position as the upper end 48a of the rod portion 48'. Further, as shown by the alternate long and short dash line in FIG. 11, the horizontal bar portion is configured to substantially follow the front-rear direction, and only the rear end 49a is wide and protrudes upward from the upper end 48a of the vertical bar portion 48'. May be.

Further, in the airbag 20 of the embodiment, the end side partition portion 47 is configured so that the vertical bar portion 48 and the horizontal bar portion 49 are continuously connected, but the airbag 20B shown in FIG. 13 As shown above, the vertical bar portion 48B and the horizontal bar portion 49B are separated as the end side partition portion 47B, and the horizontal bar portion 49B is extended substantially along the front-rear direction so as to go from the upper side to the rear of the vertical bar portion 48B. It may be configured. In FIG. 13, the horizontal bar portion 48 is configured to be inclined toward the rear upper side, but the horizontal bar portion is aligned in the front-rear direction so that the rear end is arranged at substantially the same position as the front end. May be arranged.

Further, like the airbag 20C shown in FIG. 14, the end side partition portion 47C is arranged with the vertical bar portion 48C substantially along the vertical direction so as to partition the end side expansion portion 38C and the general expansion portion 43C. It may be configured to include a separation portion 82 arranged behind the vertical bar portion 48C. In FIG. 14, the separation portion 82 is arranged above the upper end 48a of the vertical bar portion 48C. Even when the end-side compartment 47C is configured in this way, when the expansion of the airbag 20C is completed, detailed illustration is omitted, but the upper end side of the end-side expansion portion 38C is set from the portion near the separation portion 82 as the starting point XP. Can be bent so as to project to the inside of the vehicle, and the upper end 38a side (projecting inside the vehicle 41C) of the end side expansion portion 38C can be smoothly projected to the inside of the vehicle. Further, by adjusting the front-rear position of the separation portion 82, it is possible to easily set the width dimension of the vehicle inside protrusion 41C on the front-rear direction side. The separation portion does not have to be arranged above the upper end of the vertical bar portion, and may be arranged at a position substantially equal to the upper end of the vertical bar portion.

Furthermore, like the airbag 20D shown in FIG. 15, the end-side partition 85 that partitions the end-side expansion portion 38D and the general expansion portion 43D is curved backward from the vicinity of the lower end 38b of the end-side expansion portion 38D. It may be configured to be arranged so as to extend. Specifically, in the end-side section 85, the lower end 85b is arranged at a position substantially the same as the lower end 48b of the vertical bar portion 48 in the end-side section 47, and the outer shape is formed into a substantially 1/4 arc shape. The configuration is curved so that the tip (upper end 85a) faces rearward and upward. Even when the end-side compartment 85 is configured in this way, when the expansion of the airbag 20D is completed, the upper end portion of the end-side expansion portion 38D is set to the upper end of the end-side compartment 85, although detailed illustration is omitted. It can be bent so as to project inward of the vehicle from a portion near 85a (tip) as a starting point XP, and the upper end 38a side (projecting inside the vehicle 41D) of the end side expansion portion 38D smoothly projects inward of the vehicle. Can be made to. Further, by adjusting the front-rear position of the upper end 85a (tip) of the end-side compartment 85, it is possible to easily set the width dimension of the vehicle inside protrusion 41C on the front-rear direction side.

1 ... Body, 2 ... Inner panel, 9 ... Airbag cover, 14 ... Inflator, 20, 20A, 20B, 20C, 20D ... Airbag, 21 ... Bag body, 21a ... Upper edge, 21c ... Front end, 22 ... Inflatable part , 38, 38B, 38C, 38D ... end side expansion part, 38a ... upper end, 38b ... lower end, 39 ... upper part, 40 ... lower part, 41, 41B, 41C, 41D ... car inside protrusion, 43, 43B, 43C, 43D ... General expansion part, 45 ... Non-expansion part, 47, 47B, 47C ... End side section part, 48, 48B, 48C ... Vertical bar part, 48a ... Upper end, 49, 49B ... Horizontal bar part, 49a ... Tip (Rear end), 82 ... Separation part, 65 ... Connecting belt (maintenance means), 75 ... Steering wheel, 76 ... Airbag device, 77 ... Airbag, 80 ... Coupling part (maintenance means), 85 ... End side compartment , 85b ... Tip (upper end), DS ... Driver's seat (seat), P ... Driver (occupant), H ... Head, W1, W2 ... Window, V ... Vehicle, M ... Head protection airbag device.

Claims (7)

It is folded and stored on the upper edge side of the window inside the vehicle, and the upper edge side is attached and fixed to the body side of the vehicle, and the expansion gas from the inflator is allowed to flow in to project the inside of the window downward. Equipped with an airbag that expands and expands to cover
The airbag
It has a flexible bag shape, and the upper edge side is fixed to the body side of the vehicle on the upper edge side of the window at a plurality of places along the front-rear direction.
A head protection airbag device having an end-side expansion portion that is arranged on the front end side at the time of completion of expansion and is partitioned from other general expansion portions by a partition portion arranged on the rear side.
The end-side expansion portion is configured so that the upper portion arranged on the upper end side at the completion of expansion protrudes inside the vehicle from the lower portion arranged on the lower end side at the completion of expansion.
The upper portion is arranged so as to inflate the area extending from the upper rear side of the compartment portion to the lower front side of the compartment portion, and by the maintenance means, the upper portion is moved to the inside of the vehicle when the expansion is completed. It is configured to maintain the protruding state,
The maintenance means is configured to be able to maintain an arrangement state in which the vicinity of the front upper end of the end-side expansion portion in the airbag in a flatly deployed state is displaced downward from the inside of the vehicle .
The partition portion is equal to or more than the vertical bar portion arranged in the vertical direction so as to partition the end side expansion portion and the general expansion portion and the upper end of the vertical bar portion behind the vertical bar portion. A head protection airbag device characterized in that it is configured to include a separation portion arranged at a position . The head protection airbag device according to claim 1 , wherein the separation portion is arranged above the upper end of the vertical bar portion. It is folded and stored on the upper edge side of the window inside the vehicle, and the upper edge side is attached and fixed to the body side of the vehicle, and the expansion gas from the inflator is allowed to flow in to project the inside of the window downward. Equipped with an airbag that expands and expands to cover
The airbag
It has a flexible bag shape, and the upper edge side is fixed to the body side of the vehicle on the upper edge side of the window at a plurality of places along the front-rear direction.
A head protection airbag device having an end-side expansion portion that is arranged on the front end side at the time of completion of expansion and is partitioned from other general expansion portions by a partition portion arranged on the rear side.
The end-side expansion portion is configured so that the upper portion arranged on the upper end side at the completion of expansion protrudes inside the vehicle from the lower portion arranged on the lower end side at the completion of expansion.
The upper portion is arranged so as to inflate the area extending from the upper rear side of the compartment portion to the lower front side of the compartment portion, and by the maintenance means, the upper portion is moved to the inside of the vehicle when the expansion is completed. It is configured to maintain the protruding state,
The maintenance means is configured to be able to maintain an arrangement state in which the vicinity of the front upper end of the end-side expansion portion in the airbag in a flatly deployed state is displaced downward from the inside of the vehicle .
A vertical bar portion in which the partition portion is arranged substantially along the vertical direction so as to partition the end side expansion portion and the general expansion portion, and a horizontal bar portion extending rearward from the upper end of the vertical bar portion. And, it is configured to have
A head protection airbag device characterized in that the tip of the horizontal bar portion is arranged at a position equal to or higher than the upper end of the vertical bar portion . 3. The third aspect of the present invention is that the horizontal bar portion is formed so as to extend rearward and upward from the upper end of the vertical bar portion so that the tip end thereof is positioned above the upper end of the vertical bar portion. Head protection airbag device described in. It is folded and stored on the upper edge side of the window inside the vehicle, and the upper edge side is attached and fixed to the body side of the vehicle, and the expansion gas from the inflator is allowed to flow in to project the inside of the window downward. Equipped with an airbag that expands and expands to cover
The airbag
It has a flexible bag shape, and the upper edge side is fixed to the body side of the vehicle on the upper edge side of the window at a plurality of places along the front-rear direction.
A head protection airbag device having an end-side expansion portion that is arranged on the front end side at the time of completion of expansion and is partitioned from other general expansion portions by a partition portion arranged on the rear side.
The end-side expansion portion is configured so that the upper portion arranged on the upper end side at the completion of expansion protrudes inside the vehicle from the lower portion arranged on the lower end side at the completion of expansion.
The upper portion is arranged so as to inflate the area extending from the upper rear side of the compartment portion to the lower front side of the compartment portion, and by the maintenance means, the upper portion is moved to the inside of the vehicle when the expansion is completed. It is configured to maintain the protruding state,
The maintenance means is configured to be able to maintain an arrangement state in which the vicinity of the front upper end of the end-side expansion portion in the airbag in a flatly deployed state is displaced downward from the inside of the vehicle .
A vertical bar portion in which the partition portion is arranged substantially along the vertical direction so as to partition the end-side expansion portion and the general expansion portion, and a vertical bar portion separated from the vertical bar portion from above the vertical expansion portion. It is equipped with a horizontal bar that extends substantially along the front-back direction so as to face the rear.
A head protection airbag device characterized in that the horizontal bar portion is arranged at a position where the rear end is equal to or higher than the front end . The head protection airbag device according to claim 5 , wherein the horizontal bar portion is formed so as to incline and extend from the upper side of the vertical expansion portion toward the rear upper side. It is folded and stored on the upper edge side of the window inside the vehicle, and the upper edge side is attached and fixed to the body side of the vehicle, and the expansion gas from the inflator is allowed to flow in to project the inside of the window downward. Equipped with an airbag that expands and expands to cover
The airbag
It has a flexible bag shape, and the upper edge side is fixed to the body side of the vehicle on the upper edge side of the window at a plurality of places along the front-rear direction.
A head protection airbag device having an end-side expansion portion that is arranged on the front end side at the time of completion of expansion and is partitioned from other general expansion portions by a partition portion arranged on the rear side.
The end-side expansion portion is configured so that the upper portion arranged on the upper end side at the completion of expansion protrudes inside the vehicle from the lower portion arranged on the lower end side at the completion of expansion.
The upper portion is arranged so as to inflate the area extending from the upper rear side of the compartment portion to the lower front side of the compartment portion, and by the maintenance means, the upper portion is moved to the inside of the vehicle when the expansion is completed. It is configured to maintain the protruding state,
The maintenance means is configured to be able to maintain an arrangement state in which the vicinity of the front upper end of the end-side expansion portion in the airbag in a flatly deployed state is displaced downward from the inside of the vehicle .
A head protection airbag device characterized in that the compartment is configured to be curved and extend rearward from the vicinity of the lower end of the end-side expansion portion .

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