JP6485279B2 - Head protection airbag device - Google Patents

Description

  The present invention is folded and housed on the upper edge side of the window inside the vehicle, the upper edge side is attached and fixed to the vehicle body side, the inflation gas from the inflator is allowed to flow in, and the window is projected downward. The present invention relates to a head protecting airbag device configured to include an airbag configured to be deployed and inflated so as to cover the inside of a vehicle.

  Conventionally, as a head protection airbag device, the front side of a bag body that expands and inflates so as to cover the vehicle interior side of the window is separated from other general inflatable portions by an end-side partition portion formed substantially along the vertical direction. A configuration in which an end-side inflating portion to be partitioned is disposed, the base side is coupled to the end-side partitioning portion on the vehicle outer side of the end-side inflating portion, and the tip end side is fixed to the vehicle body side at the periphery of the window There is a configuration in which the tension cloth is arranged. In this conventional head protection airbag device, the vehicle interior side of the window is widely covered with a bag body that has been inflated so that the head of an occupant moving to the vehicle exterior side can be protected even when the vehicle rolls over. It was supposed to be configured. Further, in the conventional head protection airbag device, the tension cloth has a substantially right triangle shape, and the rear edge side, which is the base portion side, is joined to the end side partitioning portion over substantially the entire upper and lower sides, It was the structure which fixes the front end side which becomes this to the body side (for example, refer patent document 1).

  In this conventional head protection airbag device, when the inflation of the airbag is completed, a tension along the front-rear direction is generated from the front end (front end side) of the tension cloth to the rear end side of the bag body. The side inflating portion is pushed out by the tension cloth so that the front end side is directed toward the inside of the vehicle, and is configured to protrude from the general inflating portion to the inside of the vehicle when the inflation of the airbag is completed. Further, in the conventional head protection airbag device, the end-side inflating portion is connected to the tension cloth only at the end-side partition portion disposed on the rear edge side, and the end-side inflating portion is in the vicinity. It was the structure attached to the member by the side of the body in the upper edge side of a window in the position which becomes a little rear upper of the edge side division part which becomes.

JP 2012-20719 A (FIGS. 9 to 11)

  However, in this conventional head protection airbag device, the attachment part for attaching the upper edge side of the part near the end-side inflating part to the body side, the attachment part for attaching the upper edge side of the other part in the bag body to the body side, Since the amount of protrusion from the bag body is substantially the same, for example, the end-side inflated portion is wider on the inside of the pillar garnish of the front pillar portion that protrudes to the inside of the vehicle than the window when the inflation of the airbag is completed. When projecting to the inside of the vehicle so as to cover the area, the projecting to the inside of the vehicle may be restricted by the mounting portion arranged in the vicinity, and the inside of the front pillar portion cannot be covered smoothly. There was a fear.

  The present invention solves the above-described problem, and when the inflation of the airbag is completed, the upper end of the end-side inflation portion that is supported on the outside of the vehicle by the tension cloth can be smoothly arranged on the inside of the pillar portion. An object is to provide a possible head protection airbag device.

A head protection airbag device according to the present invention is folded and housed on the upper edge side of a window inside a vehicle, and the upper edge side is attached and fixed to the body side of the vehicle, and allows inflation gas from an inflator to flow in. An airbag configured to expand and inflate so as to cover the inside of the window while projecting downward,
Airbag
A bag body having flexibility, inflated so as to cover the inner side of the window by flowing an inflating gas into the interior; and
A protruding piece that protrudes from the upper edge side of the bag body, is arranged at a plurality of locations along the front-rear direction, and fixes the upper edge side of the bag body to the body side of the vehicle,
It is composed of a sheet material having flexibility, the base side is coupled to one end side in the front-rear direction of the bag body, and the tip side is at the periphery of the window away from the end of the bag body A tension cloth to be fixed to the vehicle body side,
A head protection airbag device having a configuration comprising:
The bag body is configured to include an end-side inflating portion that is partitioned from the other general inflating portion by the end-side partitioning portion on the end portion in the front-rear direction that is the tension cross side when the inflation is completed,
The end-side inflating portion is configured so that the upper end side is disposed on the vehicle interior side of the pillar portion that is inclined with respect to the vertical direction on the edge side in the front-rear direction of the window when the expansion is completed,
In a state where the tension cloth is arranged so as to cover the vehicle outer side of the end side inflating part, the base part side is configured to be coupled to the end side partition part,
The mounting piece portion is configured to include an end-side mounting piece portion disposed on one end side in the front-rear direction which is the end-side expansion portion side, and a general mounting piece portion disposed on the upper edge side of the general expansion portion,
The end side mounting piece is configured to be fixed to the body side at the upper end side, and the amount of upward protrusion from the bag body in a flatly deployed state is set to be larger than that of the general mounting piece. It is characterized by being.

  In the head protection airbag device of the present invention, in the airbag, the end-side attachment piece portion disposed on one end side in the front-rear direction, which is the end-side inflating portion side, is fixed to the body side at the upper end side and flat. The amount of upward protrusion from the bag body in a state where the bag is unfolded is set to be larger than that of the general attachment piece portion that fixes the upper edge side of the general expansion portion to the upper edge side of the window. That is, in the head protection airbag device according to the present invention, the length of the end-side attachment piece for fixing the upper end of one end in the front-rear direction, which is the end-side inflating portion side, to the body side is set large. Therefore, when the airbag is deployed and inflated, the deployment behavior of the end-side inflated portion that is pushed out by the tension cloth so that the end edge in the front-rear direction is directed toward the inside of the vehicle is not hindered by the end-side mounting piece. The side inflating portion can be smoothly projected to the vehicle inner side over substantially the entire vertical direction. Even if the upper end side of the end side inflating part covers the inside of the pillar garnish of the pillar part protruding from the window to the inside of the car, the end side mounting piece is under the pillar garnish, roof head lining, etc. By extending upward through the edge, it is possible to smoothly arrange the upper end side of the end side inflating portion so as to cover the inside of the pillar portion.

  Therefore, in the head protection airbag device of the present invention, when the airbag is completely inflated, the upper end of the end-side inflatable portion that is supported on the vehicle outer side by the tension cloth can be smoothly arranged on the vehicle inner side of the pillar portion. .

  Further, in the head protection airbag device of the present invention, since the end side attachment piece portion is set to have a large length dimension, the end side attachment piece portion is assumed to be a part of the pillar portion or the pillar portion. Even if it is configured to be attached to the body side such as a portion near the boundary portion between the roof side rail portion that is the upper edge side portion of the window, this end side attachment piece portion protrudes to the inside of the vehicle at the pillar portion portion. The pillar garnish arranged to be able to be bypassed, and when the airbag has been inflated, the upper end side of the end side inflatable portion supported by the tension cloth is covered with the inner side of the pillar portion. It can be arranged without hindrance. Therefore, the occupant's head that moves toward the front side of the vehicle obliquely at the time of the oblique collision can be accurately protected by the end side inflating portion that has been inflated and supported by the pillar portion.

  Furthermore, in the head protection airbag device of the present invention, the end-side inflating portion is configured to be disposed in the region of the pillar portion that is disposed on the edge side in the front-rear direction of the window. The vehicle interior side of the window can be covered widely by the inflatable portion. Therefore, even when the vehicle rolls over, the head of the occupant who moves to the outside of the vehicle can be protected accurately by suppressing the movement to the outside of the vehicle.

  Moreover, in the head protection airbag device of the present invention, the end-side attachment piece portion is arranged at a position that is closer to the end portion side in the front-rear direction than the edge portion on the general expansion portion side in the end-side partition portion. The end-side inflatable portion is fixed to the body side at the upper end side by the end-side mounting piece, and is pushed out to the inside of the vehicle more than necessary over the entire upper and lower regions by the tension cloth when the airbag is inflated. This can be suppressed. Therefore, if the head protection airbag device is configured as described above, the airbag for the passenger seat, the airbag for the steering wheel, the airbag for the steering wheel, and the side where the inflating end side inflating portion is inflated at a position close to the vehicle interior side. It is preferable that contact with an airbag or the like can be accurately suppressed, and the end-side inflatable portion can be rapidly inflated. Further, in the head protection airbag device having the above-described configuration, the end-side inflating portion is fixed to the body side using the end-side attachment piece portion on the upper end side. Can be prevented from moving down, i.e., the upper edge side of the window directly below the pillar portion can be accurately covered, and even when the vehicle rolls over, the head of the occupant who moves to the outside of the vehicle, More accurate protection can be achieved.

  Furthermore, in the head protection airbag device having the above-described configuration, the end-side attachment piece is formed so as to extend from the tension cross, and the base side is coupled to the upper edge side of the end-side inflating portion in the bag body; In this case, the tension cloth covers the outside of the end-side inflatable portion over the upper end side using the end-side attachment piece, and the tension cloth is widened up and down when the airbag is deployed and inflated. Since the inflating portion is pushed out to the inside of the vehicle, the end-side inflating portion can be more smoothly projected to the inside of the vehicle, which is preferable.

  Furthermore, in the head protection airbag device having the above-described configuration, if the end-side attachment piece portion is arranged at a position that is closer to the end side in the front-rear direction than the end-side partition portion, It is preferable that the upper end side can be accurately prevented from projecting to the inside of the vehicle more than necessary, and the upper end side of the end side inflatable portion can be stably fixed to the vehicle body side.

  Further, in the head protection airbag device having the above-described configuration, the end-side attachment piece is a position that is substantially directly above the coupling site for coupling the tension cloth to the end-side partition, and is a general inflatable portion in the end-side partition. It may be arranged at a position closer to the end side in the front-rear direction than the edge on the side. Even in such a configuration, the end-side attachment piece portion is located on the end side when the airbag is completely inflated. The upper end of the end-side inflating part is arranged on the end side in the front-rear direction rather than the edge on the general inflating part side of the end-side partition that becomes the starting point when the inflating part is bent with respect to the general inflating part. Excessive protrusion to the inner side of the vehicle can be suppressed.

  Furthermore, in the head protection airbag device of the present invention, the end attachment piece is separated from the tension cloth and is arranged at a position closer to the end in the front-rear direction than the end partition. If the end side mounting piece is separated from the tension cloth, the amount of base material used can be reduced, which makes it possible to reduce the weight and size of the device itself. It is possible to suppress the upper end side of the inflating portion from protruding more than necessary into the vehicle interior, and it is possible to stably fix the upper end side of the end side inflating portion to the vehicle body side.

  Furthermore, in the head protection airbag device of the present invention, the end-side attachment piece is separated from the tension cloth, and is located at a position directly above the coupling site for coupling the tension cloth to the end-side partition. The end section may be arranged at a position closer to the end portion in the front-rear direction than the edge portion on the general expansion portion side in the end-side partition portion. Since the amount of material used can be reduced, it is possible to reduce the weight and the size of the device itself, and the end-side mounting piece portion is generally inflated when the airbag is completely inflated. Since it is arranged on the end part side in the front-rear direction rather than the edge part on the general inflating part side of the end side partition part that becomes the starting point when bending with respect to the part, to the vehicle inner side on the upper end side of the end side inflating part Can suppress excessive protrusion of .

  Furthermore, in the head protecting airbag device of the present invention, if the tension cloth is inserted into a slit formed on the edge side in the front-rear direction of the end-side inflating portion of the bag body, the bag body and the tension cloth When the airbag is folded together, the position of the tension cloth relative to the bag body can be fixed using the edge of the slit, and the folding workability is improved, which is preferable.

  Furthermore, in the head protection airbag device of the present invention, the end side attachment piece portion may be arranged at a position that is closer to the center side in the front-rear direction than the end side partition portion. It is preferable that the upper end side of the side attachment piece portion is fixed to the region of the roof side rail portion connected to the pillar portion on the upper edge side of the window.

  In the head protection airbag device having such a configuration, when the airbag is folded and stored on the upper edge side of the window, the end-side inflating portion is placed near the end-side partition portion from the state where the bag body is flatly deployed. If the bag is folded so that the lower edge side approaches the upper edge side while folded back to the general inflating part side, the folded bag body including the end side inflating part can be separated from the pillar part on the roof side. It can be stored only in the region of the rail portion. In other words, the folded bag body is not stored in the inclined front pillar area, but only the tension cloth is stored. Therefore, even if the internal area of the front pillar section is small, the bag body can be stored smoothly. be able to.

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 which shows the state which unfolded flat the airbag used with the head protection airbag apparatus of embodiment. FIG. 3 is a partially enlarged rear view showing an end-side inflatable portion and a tension cloth in the airbag of FIG. 2. FIG. 4 is a partial enlarged cross-sectional view of the IV-IV part in FIG. 2. It is a partial expanded sectional view of the VV site | part of FIG. FIG. 3 is a front view showing a state in which the bag body and the tension cloth in a state where the attachment piece portion is attached are arranged 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 the embodiment, it is a schematic partial enlarged cross-sectional view along the front-rear direction showing a state in which the airbag is completely inflated. In the head protection airbag device of an embodiment, it is an outline fragmentary enlarged longitudinal section along the up-and-down direction which shows the state where the airbag completed inflation. It is a partial expanded front view which shows the airbag which is other embodiment of this invention. It is the general | schematic partial enlarged front view which looked at the state which the airbag of FIG. 10 completed expansion | swelling in the vehicle mounting state from the vehicle inside. It is a partial expanded front view which shows the airbag which is further another embodiment of this invention. It is a partial expanded rear view of the airbag of FIG. It is a partial expanded front view which shows the airbag which is further another embodiment of this invention. It is a partial expanded rear view of the airbag of FIG. It is a partial expanded front view which shows the airbag which is further another embodiment of this invention. It is a partial expanded front view which shows the airbag which is further another embodiment of this invention. It is the elements on larger scale of the XVIII-XVIII part of FIG. It is a partial expanded front view which shows the airbag which is further another embodiment of this invention. FIG. 20 is a partially enlarged rear view of the airbag of FIG. 19. It is a partial expanded front view which shows the airbag which is further another embodiment of this invention. It is a partial expanded front view which shows the airbag which is further another embodiment of this invention. FIG. 23 is a schematic partial enlarged front view of the state in which the airbag of FIG. 22 is mounted on the vehicle, as viewed from the inside of the vehicle, showing the vehicle mounted state of the folded airbag and the airbag inflated state.

  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, 8, and 9, the airbag cover 9 is provided under 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. Consists of edges. 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. Further, the airbag cover 9 is pushed by the airbag 20 so as to cover the inside of the airbag 20 that is folded and stored, and to allow the airbag 20 to be protruded downward in the interior of the vehicle when deployed. It is configured to be openable to the vehicle interior side I (see FIGS. 8 and 9).

  The inflator 14 supplies inflation gas to the airbag 20, and as shown in FIG. 1, as a substantially cylindrical cylinder type, a gas discharge port (not shown) capable of discharging inflation gas is provided on the tip side. It is arranged. The inflator 14 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 an attachment bracket 16 for holding the inflator 14 and a bolt 17 for fixing the attachment bracket 16 to the inner panel 2 on the body 1 side, so that (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 is controlled when the control device detects a side collision, oblique projection, or rollover of the vehicle V. An operation signal from the apparatus is input to operate the apparatus.

  Each mounting bracket 11 is composed of two sheet metal plates, and each mounting piece 54 (general mounting piece 55, end-side mounting piece 56) and mounting portion 60, which will be described later, of the airbag 20 are provided. The mounting pieces 54 and 60 are attached to the attachment pieces 54 and 60 so as to be sandwiched from the front and back sides, and the attachment pieces 54 and 60 are attached and fixed to the inner panel 2 on the body 1 side using the bolts 12. (See FIGS. 8 and 9).

  2 to 6, the airbag 20 includes a bag body 21, an attachment piece 54 for fixing the upper edge 21 a side of the bag body 21 to the inner panel 2 on the body 1 side, and the front-rear direction of the bag body 21. A tension cloth 58 extending from one end side (in the case of the embodiment, the front end 21c side) and having the tip 58b side fixed to the inner panel 2 on the body 1 side.

  As shown in the two-dot chain line in FIG. 1 and FIG. 7, the bag body 21 allows the inflation gas from the inflator 14 to flow into the interior and unfolds it from the folded state to open the windows W1 and W2 and the center pillar portion CP. And the rear pillar portion RP so as to cover the inner side I of the pillar garnishes 6 and 7, and when the expansion is completed, the outer side of the rear pillar portion RP passes through the center pillar portion CP and the window W2 from the window W1. In order to cover the inner side of the vehicle, it is formed into a substantially rectangular plate shape whose longitudinal direction is substantially along the front-rear direction (see FIGS. 2 and 6). As shown in FIGS. 2 and 7, the bag body 21 has an upper and lower width so that the lower edge 21b when the inflation is completed is positioned below the belt line BL formed by the lower edges of the windows W1 and W2. The dimensions are 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 FIGS. 2 and 4 to 6, the bag body 21 is inflated inside so as to separate the vehicle interior side wall portion 22 a located on the vehicle interior side I and the vehicle exterior wall portion 22 b located on the vehicle exterior side O when the inflation is completed. It has a gas inflow portion 22 that expands by inflow of the working gas, and a non-inflow portion 42 that does not allow the inflating gas to flow in.

  In the case of the embodiment, the gas inflow portion 22 communicates with the main inflating portion 24 (primary inflating portion) that is inflated by inflating the inflation gas discharged from the inflator 14, and the main inflating portion 24. The front side sub-expansion part 30, the center side sub-expansion part 31, the rear side sub-expansion part 32 (secondary expansion part), and the main expansion part 24, the front side sub-expansion part 30, and the center side sub-expansion part that complete the expansion after completion of the expansion. 31 and communication portions 33, 34, 35, and 36 that allow the rear side sub-expansion portion 32 to communicate with each other. In the case of the embodiment, as shown in FIGS. 2 and 6, the bag body 21 divides a main inflating portion 24, a front side sub inflating portion 30, a center side sub inflating portion 31, and a rear side sub inflating portion 32, which will be described later. Except for a small region of the end side partition 44, the general partition 45, 46 and the thickness regulating portions 48, 49, 50, 51, 52, the expansion gas is caused to flow into the interior over substantially the entire surface so as to expand. ,It is configured.

  The main expansion part 24 includes a gas guide channel 25, a connection port part 26, a front seat protection part 27, and a rear seat protection part 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 G is 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 slightly shifted forward from the front and rear center of the gas guide channel 25 (position that is substantially the front and rear of 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. (See FIGS. 2 and 6).

  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 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.

  The front sub-inflatable portion 30 is disposed on the front end 21c side of the bag body 21 so as to be adjacent to the front side of the main inflatable portion 24 (front seat protection portion 27). This front side sub-expansion portion 30 disposed on the 21c side constitutes an end-side expansion portion 38. In the case of the embodiment, the front side sub-expansion part 30 is formed into a substantially rod shape substantially in the vertical direction, and the front seat protection part 27 adjacent to the rear side by the end side partition part 44. It is partitioned. In the case of the embodiment, the front side sub-expansion portion 30 is configured to extend below the belt line BL and to have the lower end 38b side positioned below the front seat protection portion 27 when the expansion is completed. . Further, the front side sub-expansion portion 30 is communicated with the front seat protection portion 27 by a communication portion 33 opened to the rear upper end side and a communication portion 34 opened to the rear lower end side. These communicating portions 33 and 34 are configured so that the opening width dimension is set small, and the start of the inflow of the inflation gas into the front side secondary inflation portion 30 is delayed with respect to the front seat protection portion 27. .

  In the case of the embodiment, the central side sub-inflating part 31 is located on the main inflating part 24 on the rear side of the front seat protecting part 27 and on the lower side of the gas guiding channel 25 so that the main inflating part 31 is arranged. The portion 24 is disposed adjacent to the front seat protection portion 27. In the case of the embodiment, the center side sub-inflating portion 31 communicates with the front seat protection portion 27 by a communication portion 35 that is opened to 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 the flow of the inflation gas into the central side secondary inflation portion 31 relative to the front seat protection portion 27. In the case of the embodiment, the rear side sub-expansion portion 32 is disposed so as to fill a lower region of the gas guide channel 25 between the center side sub-expansion portion 31 and the rear seat protection portion 28. The main inflating portion 24 is disposed adjacent to the rear seat protection portion 28. In the case of the embodiment, the rear sub-expansion portion 32 is communicated with the rear seat protection portion 28 by a communication portion 36 opened to the front 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 the flow of the inflation gas into the rear side sub-expansion portion 32 relative to the rear seat protection portion 28.

In the bag main body 21 of the embodiment, the front side secondary inflatable portion 30 constitutes an end side inflatable portion 38 disposed on the front end 21 c side of the bag main body 21, and the gas inflow portion 22 has portions other than the end side inflatable portion 38. The general expansion part 39 is configured. The end-side inflating portion 38 is partitioned from the front seat protecting portion 27 constituting the general inflating portion 39 by the end-side partitioning portion 44. Specifically, in the case of the embodiment, the end-side partition portion 44 is formed substantially along the vertical direction, and is configured as a bar shape that is separated from the peripheral portion 43 and substantially along the vertical direction, as will be described later. The end side inflating portion 38 is communicated with the front seat protecting portion 27 through the communicating portions 33 and 34 on the upper end 38a side and the lower end 38b side. Further, the end side inflating portion 38 is configured so that the upper end 38a substantially coincides with the upper edge of the general inflating portion 39 in the state where the bag body 21 is flattened, and when the inflating is completed, Are arranged on the vehicle interior side of the front pillar portion FP that is inclined rearwardly with respect to the vertical direction on the front edge side of the window W1. Specifically, the end-side inflating portion 38 has a vehicle inner side I in a region on the rear end side of the front pillar garnish 4 that covers the vehicle inner side of the front pillar portion FP by a portion on the upper end 38a side when the airbag 20 is inflated. It will be arranged so as to cover. Further, when the airbag 20 is completely inflated, the end-side inflating portion 38 is disposed with the lower end 38b projecting downward from the belt line BL (see FIGS. 7 and 9).

  The non-inflow part 42 includes a peripheral part 43 constituting the outer peripheral edge of the gas inflow part 22, an end side partition part 44, general partition parts 45 and 46, and a thickness regulating part 48 disposed in the region of the gas inflow part 22. , 49, 50, 51, 52.

  The peripheral edge portion 43 is disposed so as to surround the periphery of the gas inflow portion 22 over the entire circumference except for the rear end 26a side of the connection port portion 26.

  The end side partition 44 separates the upper and lower end sides from the peripheral edge 43 so as to partition the front side sub-inflatable portion 30, the front seat protecting portion 27 (the end-side inflatable portion 38 and the general inflatable portion 39). Thus, it is configured as a substantially rod shape extending substantially along the vertical direction. Moreover, the end side partition part 44 is formed so that the upper end 44a may protrude above the general partition part 46 mentioned later.

  The general partition parts 45 and 46 are disposed in the region of the general expansion part 39, and the general expansion part 39 is replaced with the gas guide channel 25, the front seat protection part 27, the rear seat protection part 28, and the central side secondary expansion. It is divided into a portion 31 and a rear side sub-inflatable portion 32. The general partitioning portion 45 is arranged in a substantially rod shape extending upward from the lower edge side portion of the peripheral edge portion 43 so as to partition the center side sub-inflating portion 31 and the rear side sub-inflating portion 32. The general partition portion 46 constitutes the lower edge side of the gas guide channel 25, and the general partition portion so as to partition the center side sub-expansion portion 31 and the rear side sub-expansion portion 32 from the gas guide channel 25. It is formed so as to extend from the upper end of 45 to the front and rear. On the front end side of the general partition section 46, the front seat protection section 27 and the center side sub-expansion section 31 are partitioned and bent while curving downward so as to regulate the thickness of this area. A curved section 46a is arranged.

  The thickness restricting portion 48 is arranged in a position near the front end of the gas guide channel 25 and behind the communicating portion 33 with the outer shape being a flat, substantially U-shape. The thickness regulating portion 48 suppresses a large amount of inflation gas from flowing to the communication portion 33 side (front side secondary inflation portion 30 side) when the main inflation portion 24 is inflated, and is integrated with the gas guide channel 25. This is arranged in order to prevent the front upper portion of the front seat protecting portion 27 that is configured to expand thickly. The thickness restricting portion 49 has a substantially inverted J shape on the lower edge side of the front seat protecting portion 27 so as to protrude forward from a portion on the lower edge side of the peripheral edge portion 43 while tilting forward. Is formed. The thickness restricting portion 50 is formed on the lower edge side of the central side sub-inflatable portion 31 so as to protrude upward from a portion on the lower edge side of the peripheral edge portion 43. The thickness regulating portion 51 is formed so as to protrude upward from a portion on the lower edge side of the peripheral portion 43 in the vicinity of the boundary portion between the rear side sub-inflating portion 32 and the rear seat protecting portion 28. The thickness regulating portion 52 has an outer shape that is a flat, substantially inverted V-shape at a position behind the general partition portion 46 in the region of the rear seat protection portion 28, and an upper end that is higher than the general partition portion 46. It is arranged so as to protrude. And in the airbag 20 of embodiment, the clearance gap between the end side division part 44 and the upper edge side of the peripheral part 43 comprises the communication part 33, and the edge part of the end side division part 44 and the peripheral part 43 has a lower edge side. The gap between them constitutes the communication part 34. Further, the gap between the curved partition part 46 a and the thickness regulating part 50 in the general partition part 46 constitutes the communication part 35, and between the portion on the rear end side of the general partition part 46 and the thickness regulating part 51. The communication gap 36 constitutes the gap.

  The attachment piece 54 is a part for attaching the upper edge 21a side of the bag body 21 to the inner panel 2 on the body 1 side of the vehicle V, and projects upward and downward from the upper edge 21a of the bag body 21. It is arranged at several places along the direction. In the case of the embodiment, as shown in FIG. 2, the attachment piece portion 54 includes an end-side attachment piece portion 56 disposed on the upper edge side on the front end side that is the end-side expansion portion 38 (front-side sub-expansion portion 30) side, And a general attachment piece portion 55 disposed on the upper edge side of the general expansion portion 39. In the case of the embodiment, four general attachment pieces 55 are arranged along the front-rear direction. This general attachment piece 55 is a part for fixing the upper edge side of the general expansion part 39 to the upper edge side of the windows W1, W2, and the amount of upward protrusion of the general attachment piece part 55 from the bag body 21 is as follows. When the inflation of the airbag 20 is completed, the general attachment piece 55 is not exposed downward from the roof head lining 5 and is set to a protruding amount so that the whole is covered with the roof head lining 5. Mounting holes 55 a and 56 a for inserting the mounting bolts 12 are formed in each of the general mounting piece portions 55 and the end side mounting piece portions 56. In the case of the embodiment, the general attachment piece 55 is formed of a woven fabric made of polyamide yarn, polyester yarn, or the like as a separate body from the bag body 21 and using a suture thread for the bag body 21. Are sewn.

  In the case of the embodiment, the end-side mounting piece 56 is formed so as to extend from the tension cloth 58 (see FIGS. 3, 4, and 6), as will be described later. It is arrange | positioned in the position which becomes ahead rather than the edge part (rear edge 44b). Specifically, the end-side attachment piece 56 is disposed on the front end side with respect to the end-side partition portion 44 and above a position that is substantially the center before and after the end-side expansion portion 38 (FIG. 2). , 3). The end-side attachment piece 56 is configured such that an attachment hole 56a is arranged on the upper end side, and in the case of the embodiment, the upper end side is fixed to the inner panel 2 at the site of the front pillar portion FP. And the end side attachment piece part 56 is a general attachment piece part by the amount of protrusion (the separation distance from the upper edge 21a of the bag body 21 to the attachment hole 56a) from the bag body 21 in a state where it is flatly developed. 55 is set to be larger than the upward protrusion amount from the bag body 21 (the separation distance from the upper edge 21a of the bag body 21 to the mounting hole 55a). In the case of the embodiment, the end-side attachment piece 56 is fixed to a portion near the upper end (rear end) of the front pillar portion FP (see FIGS. 1 and 7). As shown in FIG. 7, the end-side inflating portion 38 is disposed so as to project the upper end 38 a side from the front pillar garnish 4 and cover the inside I of the front pillar garnish 4 as shown in FIG. 7. As shown in FIG. 9, the end-side mounting piece portion 56 bypasses the lower edge side portion (airbag cover 9) of the opened front pillar garnish 4 when the airbag 20 is completely inflated. , Will be placed. And this end side attachment piece part 56 is the upper end 38a side of the end side expansion part 38, without excessively pulling the end side expansion part 38 about the protrusion amount (length dimension) from the bag main body 21 upwards. Is set to such a size that can be arranged at a position where it is supported by a portion on the upper end side of the front pillar garnish 4. In the case of the embodiment, the length dimension of the end-side attachment piece portion 56 (the separation distance from the upper edge 21a of the bag body 21 to the attachment hole 56a) is the length dimension of the general attachment piece portion 55 (the upper edge of the bag body 21). The separation distance from 21a to the mounting hole 55a) is set to about four times.

  The tension cloth 58 is made of a flexible sheet material, and in the case of the embodiment, the tension cloth 58 is made of a woven fabric made of polyamide yarn or polyester yarn. As shown in FIGS. 3 to 5, the tension cloth 58 is disposed outside the end-side inflating portion 38 (the front side inflating portion 30) when the bag body 21 is completely inflated. It is connected to the end side partition 44. In the case of the embodiment, the tension cross 58 is configured as a substantially trapezoidal shape in which the hypotenuse is positioned on the front edge side as shown in FIGS. The upper edge is substantially coincident with the lower edge, and the lower edge is arranged at a position slightly above the center of the upper and lower ends of the end-side expansion portion 38. That is, in the airbag 20 of the embodiment, the tension cloth 58 covers the vehicle outer side O in the region of the upper half of the end-side inflating portion 38 over the substantially entire surface by the support portion 59 whose outer shape is substantially trapezoidal. It is configured. Further, a substantially strip-shaped protruding piece portion 61 constituting the end-side attachment piece portion 56 is formed on the upper edge side of the tension cloth 58 so as to protrude upward. As described above, the protruding piece portion 61 constituting the end-side attachment piece portion 56 is disposed so as to protrude upward at a position approximately at the front and rear of the end-side inflating portion 38. The base portion 61a side of the piece portion 61 is sewn (coupled) to a portion on the upper edge side of the end-side expanded portion 38 in the peripheral edge portion 43 using a suture (see FIGS. 2 to 4). Further, in the tension cloth 58, an attachment portion 60 fixed to the inner panel 2 on the body 1 side at the front pillar portion FP is formed on the front end 58b side (front end side) extending forward from the lower edge. Has been. The mounting portion 60 is configured to be fixed to the inner panel 2 by using the mounting bracket 11 and the mounting bolt 12 (see FIG. 8), similarly to the mounting piece portion 54, and can be inserted through the mounting bolt 12. A hole (not shown) is provided. Further, the tension cloth 58 is sewn using a suture thread at the lower end side portion (in the embodiment, the lower half region in the embodiment) on the base portion 58a side to the end side partition portion 44 portion. Has been.

  In the airbag 20 of the embodiment, the front seat protection part 27, the rear seat protection part 28, the central side secondary inflation part 31, and the rear side secondary inflation part 32 are non-removed when inflation is completed when the vehicle is mounted. The inflated state expands so as to reduce the width dimension in the front-rear direction, and the attachment portion 60 disposed on the front end 58b side of the tension cloth 58 and the general attachment piece portion 55R disposed on the rear end side of the bag body 21. As shown in FIG. 7, a tension T substantially along the front-rear direction is generated.

  Next, mounting of the head protection airbag device M of the embodiment on the vehicle V will be described. The bag body 21 in a state in which the tension cloth 58 is sewn in advance and the vehicle inner wall portion 22a and the vehicle outer wall portion 22b are overlapped and flattened so that the lower edge 21b side approaches the upper edge 21a side, The airbag 20 is folded by folding the tension cloth 58 together. After the folding of the airbag 20 is completed, a predetermined portion of the airbag 20 is wrapped with a wrapping material (not shown) for preventing collapse.

  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 using the clamp 15, the mounting portion 60 of the tension cloth 58, the end side mounting piece portion 56, The mounting bracket 11 is fixed to the general mounting piece 55 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, 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 side collision, oblique collision, or rollover of the vehicle V, The inflating gas discharged from the inflator 14 flows into the bag body 21, and the expanding bag body 21 breaks a wrapping material (not shown), and further lower edges of the front pillar garnish 4 and the roof head lining 5. The airbag cover 9 is pushed open and protrudes downward. As shown in the two-dot chain line in FIG. 1 and in FIG. 7, the windows W1 and W2, the center pillar portion CP, and the rear pillar portion RP inside the vehicle It will expand greatly so as to cover it. In addition, when the airbag 20 is completely inflated, in the head protection airbag device M according to the embodiment, the airbag 60 is disposed on the attachment portion 60 disposed on the front end 58b side of the tension cloth 58 and on the rear end side of the bag body 21. Since the tension T is generated between the general attachment piece portion 55R, in other words, from the tension cross 58 to the general expansion portion 39 along the front-rear direction (see FIG. 7), the end-side expansion portion 38 is The tension cloth 58 is pushed out to the vehicle inner side I, and as shown in FIG. 8, the front edge 38c is inclined toward the vehicle inner side I while being inclined and arranged to protrude to the vehicle inner side I. Become.

  In the head protection airbag device M of the embodiment, in the airbag 20, the end-side attachment piece 56 disposed on the upper edge side in the vicinity of the end-side inflating portion 38 is fixed at the upper end side to the body 1 side. In addition, the amount of upward protrusion from the bag body 21 in a flatly deployed state is set to be larger than that of the general attachment piece 55 for fixing the upper edge side of the general inflating portion 39 to the upper edge side of the windows W1, W2. . That is, in the head protection airbag device M of the embodiment, the end side attachment piece 56 that fixes the upper end side of the vicinity of the end side inflating portion 38 to the body 1 side is set to have a large length dimension. Thus, when the airbag 20 is deployed and inflated, the deployment behavior of the end-side inflatable portion 38 that is pushed out by the tension cloth 58 so that the front edge 38c that is the end edge in the front-rear direction is directed toward the vehicle interior I is The end side inflating portion 38 can be smoothly projected to the inside of the vehicle over substantially the entire area in the up and down direction without being obstructed by 56. Further, even if the upper end 38a side of the end side inflating portion 38 covers the vehicle inner side of the front pillar garnish 4 of the front pillar portion FP protruding to the vehicle inner side I from the window W1, the end side mounting piece 56 Is extended upward from the attachment hole 56a side through the lower edge of the airbag cover 9 and connected to the upper end 38a side of the end-side expansion part 38, the upper end 38a side of the end-side expansion part 38 is It can arrange | position smoothly so that the vehicle inside I of the front pillar part FP (front pillar garnish 4) may be covered.

  Therefore, in the head protecting airbag device M of the embodiment, when the airbag 20 is completely inflated, the upper end 38a of the end-side inflating portion 38 that is supported by the tension cross 58 on the outer side O is used as the inner side of the front pillar portion FP. Can be arranged smoothly.

  Further, in the head protection airbag device M of the embodiment, since the end-side attachment piece 56 is set to have a large length dimension, the end-side attachment piece 56 is the body 1 at the site of the front pillar portion FP. Even if it is the structure attached to the side, this end side attachment piece part 56 can bypass the front pillar garnish 4 arrange | positioned so that it may protrude in the vehicle inside I in the site | part of the front pillar part FP, and an airbag When the expansion of 20 is completed, the upper end 38a side of the end side expansion portion 38 supported by the tension cross 58 on the vehicle outer side O is disposed without any trouble so as to cover the vehicle inner side I of the front pillar portion FP (front pillar garnish 4). (See FIG. 9). Therefore, at the time of oblique collision, the occupant's head that moves toward the front of the vehicle obliquely forward is accurately protected by the end-side expansion portion 38 that has been expanded and supported by the front pillar portion FP (front pillar garnish 4). can do. Further, the end-side inflating portion 38 is disposed so that the upper end 38a side covers the vehicle interior I of the front pillar garnish 4 and the lower end 38b side is positioned below the belt line BL when the inflation is completed. This is a configuration to be arranged (see FIGS. 7 and 9). Therefore, the end-side inflatable portion 38 can support the upper end 38a side by the front pillar garnish 4 when receiving the head of an occupant moving obliquely forward on the outside of the vehicle, and the lower end 38b side to the belt. Since it can be supported by a member such as a door trim that protrudes to the inside of the vehicle below the window W1 below the line BL, the occupant's head can be restrained accurately.

  Furthermore, in the head protection airbag device M of the embodiment, the end-side inflating portion 38 is configured to be disposed in the region of the front pillar portion FP disposed on the front edge side of the window W1. And the general inflating portion 39 can widely cover the inside of the window W1. Therefore, even when the vehicle V rolls over, the head of the occupant moving to the vehicle outer side O can be accurately protected by suppressing the movement to the vehicle outer side O.

  Furthermore, in the head protection airbag device M of the embodiment, the end-side inflating portion 38 is fixed to the body 1 side by the end-side attachment piece 56 on the upper end 38a side. At the time of expansion, the tension cloth 58 can suppress pushing out to the inside of the vehicle more than necessary over the entire upper and lower regions. Therefore, in the head protection airbag apparatus M of the embodiment, the end-side inflating portion 38 protrudes from the window W1 toward the vehicle inner side, and on the vehicle inner side of the front pillar portion FP disposed close to the instrument panel. Even in the configuration to be inflated, the inflating end side inflating portion 38 comes into contact with the airbag for the passenger seat, the airbag for the steering wheel, etc., which are inflated at a position close to the vehicle inner side I. It can suppress exactly and can expand the end side expansion part 38 rapidly. Moreover, since the end side expansion part 38 is being fixed to the body 1 side using the end side attachment piece part 56 at the upper end 38a side, when expansion is completed, it will fall below the general expansion part 39. That is, the upper edge side of the window W1 directly below the front pillar portion FP can be covered accurately. Further, as described above, the end side inflating portion 38 is supported on the upper end 38a side and the lower end 38b side by the front pillar garnish 4 and the door trim projecting from the window W1 to the inside of the vehicle. Even at the time of rollover, the head of the occupant moving to the vehicle outer side O can be more accurately protected by suppressing the movement to the vehicle outer side O.

  Further, in the head protection airbag device M of the embodiment, the end-side attachment piece portion 56 includes a protruding piece portion 61 extending from the tension cloth 58, and the base portion 61a side of the protruding piece portion 61 is connected to the bag body. 21 is coupled to the upper edge side of the end side inflating portion 38. Therefore, the tension cloth 58 covers the vehicle outer side O of the end-side inflating portion 38 toward the upper end 38a side by using the end-side attaching piece 56, and the tension cloth 58 moves up and down when the airbag 20 is deployed and inflated. Thus, the end side inflating portion 38 is pushed out to the vehicle inner side I in a wide range, and the end side inflating portion 38 can be protruded to the vehicle inner side I more smoothly. In particular, in the head protection airbag device M of the embodiment, the tension cloth 58 has a substantially trapezoidal outer shape, and the support portion 59 that covers the vehicle outer side O in the upper half region of the end-side inflatable portion 38 over substantially the entire surface. Since the airbag 20 is deployed and inflated, the upper half region of the end side inflatable portion 38 can be pushed out to the vehicle inner side I over substantially the entire surface, and the end side inflatable portion 38 can be stably stabilized. I can be projected. Note that the outer shape of the tension cloth having the end-side attachment piece portion is not limited to that of the embodiment. For example, a belt-like member that forms the end-side attachment piece portion is extended upward from a belt-like member. Thus, it may be configured to have a substantially L shape or a substantially T shape.

  Further, in the head protection airbag device M of the embodiment, the end-side attachment piece 56 is disposed at a position that is on the front end side with respect to the end-side partition portion 44, and in detail, before and after the end-side inflating portion 38. It is the structure arrange | positioned in the position used as the approximate center. Therefore, the upper end 38a side of the end side inflating portion 38 can be accurately suppressed from projecting to the vehicle inner side I more than necessary, and the upper end 38a side of the end side inflating portion 38 can be stably kept on the body 1 side of the vehicle V. Can be fixed.

  If such a point is not taken into consideration, as in the airbag 20A shown in FIG. 10, the end-side attachment piece 56A is located immediately above the coupling portion 63 that connects the tension cloth 58A to the end-side partition 44A. It is good also as a structure arrange | positioned in a position. The airbag 20A shown in FIG. 10 compares the end-side inflating portion 38A with the end-side inflating portion 38 and the end-side partitioning portion 44 of the bag body 21 described above together with the end-side partitioning portion 44A disposed on the rear side. The bag body 21A is configured so that the width dimension on the front-rear direction side is slightly increased so as to be positioned on the front side, and the tension cloth is set so that the width dimension on the front-rear direction side is reduced by the amount of movement toward the front side of the end side inflating portion 38A. 58A and an attachment piece 54A for fixing the upper edge 21a side of the bag body 21A to the inner panel 2, and the bag body 21A and the tension cloth 58A are the same as those described above except that the shape is slightly different. The bag 20 has the same configuration as that of the bag body 21 and the tension cloth 58. Therefore, the same members are denoted by “A” at the end of the same reference numerals, and detailed description thereof is omitted. Further, the attachment piece portion 54A has the same configuration as the attachment piece portion 54 in the airbag 20 described above, and “A” is appended to the end of the same reference numeral to omit detailed description. In the airbag 20A, the end-side partition portion 44A is disposed at a position substantially directly below the end-side attachment piece portion 56A. Further, unlike the airbag 20 described above, the coupling portion 63 that couples the tension cloth 58A to the end partition 44A is substantially double-lined, and is separated from the rear edge 44b of the end partition 44A in front. (In detail, a position that is approximately the center before and after the end-side partition portion 44A). Specifically, the end-side attachment piece portion 56A has a configuration in which the rear edge is arranged almost immediately above the coupling portion 63, and is more than the rear edge 44b that becomes the edge portion on the general expansion portion 39A side of the end-side partition portion 44A. It is arranged on the front end side. In the airbag 20A, the end-side partition portion 44A is disposed close to the front pillar portion FP as shown in FIG. Also in the airbag 20A having such a configuration, the end-side attachment piece 56A is an end-side section that is a starting point when the end-side inflating portion 38A is bent with respect to the general inflating portion 39A when the inflating of the airbag 20A is completed. Since it is arranged on the front end side with respect to the rear edge 44b of the portion 44A, excessive protrusion of the end side inflating portion 38A to the vehicle inner side on the upper end 38a side can be suppressed.

  In addition, if it is the structure which can suppress moderately the protrusion to the vehicle inner side by the side of the upper end 38a of the end side expansion part 38, like the airbag 20G shown in FIG. 21, the end side attachment piece part formed in the tension cross 58G If 56G (projection piece part 61G) is the end side expansion part 38 vicinity, it is good also as a structure arrange | positioned in the position which becomes a little rear side from the end side division part 44. In the airbag 20G, the end side attachment piece 56G (projection piece 61G) is not shown in detail, but, like the airbag 20H described later, a roof side rail connected to the front pillar portion on the upper edge side of the window. It is the structure fixed to the inner panel of the area | region of a part. In the airbag 20G having such a configuration, when the airbag 20G is folded and stored, for example, the end-side inflatable portion 38 is moved from the state in which the bag body 21 is flattened to a portion near the end-side partition portion 44. When the bag is folded back to the general inflating portion 39 side so that the lower edge side is brought closer to the upper edge side, the bag body 21 folded in a substantially rod shape including the end-side inflating portion 38 is separated from the front pillar portion. It can be accommodated only in the region of the roof side rail portion arranged along the direction. When the airbag 20G is folded in this manner, in other words, the folded bag body 21 is not stored in the region of the front pillar portion that is inclined with respect to the front-rear direction, and only the tension cloth 58G is stored. Therefore, even when the inner area of the front pillar portion is narrow, it can be stored smoothly. In addition, since the bag body 21 folded in a substantially rod shape can be easily stored in the region of the substantially linear roof side rail portion, the assembly work to the body side can be performed efficiently.

  Moreover, as shown in FIGS. 12 and 13, an airbag 20 </ b> B having a configuration in which the end attachment piece 56 </ b> B is separated from the tension cloth 65 may be used. In the airbag 20B, the end attachment piece 56B is configured as a separate body from the tension cloth 65 and the bag body 21B, like the other general attachment pieces 55B. The end attachment piece 56B has substantially the same configuration as the end attachment piece 56 in the airbag 20, except that it is separate from the tension cloth 65, and is formed from the upper edge 21a of the bag body 21B. The upward projecting amount and the arrangement position with respect to the end-side partition portion 44B are also set substantially the same as the end-side attachment piece portion 56 in the airbag 20 described above. The bag body 21B and the attachment piece portion 54B (general attachment piece portion 55B) have the same configuration as the bag body 21 and the attachment piece portion 54 (general attachment piece portion 55) in the airbag 20 described above, and have the same reference numerals. A detailed description is omitted by adding “B” at the end.

The tension cloth 65 is formed of a woven fabric made of polyamide yarn, polyester yarn, or the like, and is disposed outside the end-side inflatable portion 38B. The tension cloth 65 is formed as a belt shape substantially along the vertical direction on the base portion 65a side. And a belt portion 67 extending substantially along the front-rear direction so as to protrude forward from a position slightly above the center of the top and bottom of the mounting base 66. It has a letter shape (see FIG. 13). A mounting portion 68 fixed to the inner panel 2 on the body 1 side is formed on the front end side of the belt portion 67 on the tip 65b side of the tension cloth 65. The mounting base 66 on the side of the base portion 65a is a part coupled to the end side partition 44B, and in the case of the embodiment, the length dimension is set slightly smaller than the length dimension of the end side partition 44B, It is sewn to the end side partition part 44B using the suture throughout the entire upper and lower regions. The coupling portion 70 for coupling the attachment base 66 to the end side partition 44 </ b> B has an oval shape whose outer shape is substantially similar to the attachment base 66. That is, the attachment base 66 is coupled to the end side partition 44B over substantially the entire surface.

  In the airbag 20B having such a configuration, the end-side attachment piece portion 56B is separated from the tension cloth 65. Therefore, the end-side attachment piece portion 56 is connected to the tension cloth 58 as in the airbag 20 described above. Compared with the case of forming integrally, the usage-amount of a base material can be reduced, and it becomes possible to achieve weight reduction and compactness of apparatus itself. Further, also in the airbag 20B, the end-side attachment piece portion 56B is configured to be disposed at a substantially central position before and after the end-side inflating portion 38B, which is a position on the front end side with respect to the end-side partition portion 44B. is there. Therefore, when the expansion is completed, it is possible to suppress the upper end 38a side of the end side inflating portion 38B from protruding beyond the inside of the vehicle more than necessary, and the upper end 38a side of the end side inflating portion 38B can be stably stabilized. It can be fixed to one side. Further, in the airbag 20B, the tension cloth 65 is coupled to the end-side partition portion 44B over a wide range (substantially the entire area above and below the end-side partition portion 44B) of the attachment base 66 on the base portion 65a side. Thus, when the airbag 20B is deployed and inflated, the end section 44B is pulled by the belt portion 67 in a wide range up and down, and when the inflation is completed, the attachment portion 68 on the tip 65b side of the tension cloth 65, A large tension can be generated between the bag body 21B and a general attachment piece (not shown) arranged on the rear end side of the bag body 21B, and the restraining performance of the occupant's head at the time of a side collision can be further improved.

Further, a tension cloth 73 such as an airbag 20C shown in FIGS. 14 and 15 may be used as a modification of the configuration in which the end side attachment piece is separated from the tension cloth. Since the airbag 20C has the same configuration as the airbag 20B described above except for the tension cloth 73, the same members are denoted by the same reference numerals, and detailed description thereof is omitted. The tension cloth 73 is formed of a woven fabric made of polyamide yarn, polyester yarn, or the like, and is disposed outside the end-side expansion portion 38 (front side sub-expansion portion 30). The tension cloth 73 is disposed substantially along the front-rear direction. A belt portion 75 and a mounting base portion 74 that branches up and down from the base portion side of the belt portion 75 and extends so as to expand the front end side, and the outer shape is substantially Y-shaped (see FIG. 15). The tension cloth 73 is sewn (bonded) to the end portions 74a and 74b of the mounting base portion 74 on the base portion 73a side by using sutures on the upper end side and the lower end side of the end side partition portion 44B, respectively. It is supposed to be configured. An attachment portion 76 that is fixed to the inner panel 2 on the body 1 side is formed on the front end side of the belt portion 75 that is the tip 73b side of the tension cloth 73. Even when such a tension cloth 73 is used, the tension cloth 73 is located at a position where the attachment base 74 on the base portion 73a side is vertically separated (a portion between the upper end side and the lower end side of the end side partition portion 44B). Since it is coupled to the end-side partition portion 44B, when the airbag 20C is deployed and inflated, the end-side partition portion 44B is pulled by the belt portion 75 in a wide range up and down. 73, a large tension can be generated between the attachment portion 76 on the front end 73b side of the 73 and a general attachment piece portion (not shown) disposed on the rear end side of the bag body 21B. It is possible to further improve the restraining performance.

  Further, as in the airbag 20D shown in FIG. 16, the end-side attachment piece portion 56B, which is separated from the tension cloth 65D, is positioned just above the connecting portion 78 that connects the tension cloth 65D to the end-side partition portion 44A. It is good also as a structure arrange | positioned. An airbag 20D shown in FIG. 16 includes a bag body 21A, a tension cloth 65D, and an attachment piece 54B that fixes the upper edge 21a side of the bag body 21A to the inner panel 2. The bag body 21A has the same configuration as the bag body 21A in the above-described airbag 20A, and the same members are denoted by the same reference numerals and detailed description thereof is omitted. The tension cloth 65D has the same configuration as the tension cloth 65 in the airbag 20B described above, except that the width dimension on the front-rear direction side is set small by the amount of movement of the end side inflating portion 38A to the front side in the bag body 21A. The same members are denoted by “D” at the end of the same reference numerals, and detailed description thereof is omitted. Moreover, the attachment piece part 54B is the same structure as the attachment piece part 54B in the above-mentioned airbag 20B, attaches | subjects the same figure code | symbol, and abbreviate | omits detailed description. In the airbag 20D, the end-side partition portion 44A is disposed at a position substantially directly below the end-side attachment piece portion 56B. Further, unlike the coupling portion 70 of the airbag 20B described above, the coupling portion 78 that couples the tension cloth 65D to the end-side partition portion 44A has a substantially double line shape than the rear edge 44b of the end-side partition portion 44A. Is also formed at a position separated from the front side (specifically, a position that is substantially the center before and after the end-side partition portion 44A). Specifically, the end-side attachment piece portion 56B has a rear edge disposed substantially immediately above the coupling portion 78, and the rear-side attachment portion 56B has a rear edge 44b serving as an edge on the general expansion portion 39A side of the end-side partition portion 44A. Is also arranged on the front end side. Also in the airbag 20D having such a configuration, since the end-side attachment piece 56B is separated from the tension cloth 65D, the amount of the base material used can be reduced, and the weight reduction and the device itself can be achieved. It becomes possible to achieve downsizing. Further, also in the airbag 20D, the end-side attachment piece 56B has the end-side partition portion 44A serving as a starting point when the end-side inflating portion 38A is bent with respect to the general inflating portion 39A when the inflation of the airbag 20D is completed. Since it is arranged on the front end side with respect to the rear edge 44b, excessive protrusion of the end side inflating portion 38A toward the vehicle inner side on the upper end 38a side can be suppressed.

  If the end side inflating portion 38 has a structure that can moderately suppress the protrusion of the end side inflating side 38a toward the vehicle interior side, the air shown in FIG. As in the case of the bag 20 </ b> H, the end attachment piece 56 </ b> H may be disposed at a position slightly rearward of the end partition 44 as long as it is in the vicinity of the end expansion part 38. In this airbag 20H, as shown in FIG. 23B, the end-side attachment piece 56H is fixed to the inner panel 2 in the region of the roof side rail portion RR connected to the front pillar portion FP on the upper edge side of the window W1. It is. In the airbag 20H having such a configuration, the end-side inflatable portion 38 is folded back to the general inflatable portion 39 side at a portion near the end-side partition portion 44 from a state where the bag body 21 is flatly deployed when folded. In this state, the bag body 21 that can be folded so that the lower edge side approaches the upper edge side and is folded in a substantially rod shape including the end-side inflating portion 38 is, as shown in FIG. It can be accommodated only in the region of the roof side rail portion RR that is disposed along the front-rear direction away from the FP. In other words, the folded bag main body 21 is not stored in the region of the front pillar portion FP that is disposed to be inclined with respect to the front-rear direction, and only the tension cloth 65 is stored (A in FIG. 23). Reference), even when the inner area of the front pillar portion FP is narrow, it can be smoothly stored. In addition, since the bag body 21 folded in a substantially rod shape can be easily stored in the region of the substantially linear roof side rail portion RR, the assembly work on the body 1 side can also be performed efficiently.

  Furthermore, as shown in FIGS. 17 and 18, as the airbag 20 </ b> E, a tension cloth 58 is inserted into a front edge side portion (a front edge side portion of the end side inflating portion 38 </ b> E) of the peripheral edge portion 43 </ b> A in the bag body 21 </ b> E. The slit 80 may be formed, and the tension cloth 58 may be inserted into the slit 80. If the airbag 20E has such a configuration, the edge of the slit 80 is used to position the tension cloth 58 relative to the bag body 21E when the airbag 20E is folded integrally with the bag body 21E and the tension cloth 58. And can be fixed. Therefore, the folding workability of the airbag 20E is improved when the bag body 21E is folded together with the tension cloth 58 from the lower edge side.

  Furthermore, you may use the thing of the structure shown to FIG. 19, 20 as the airbag 20F. An airbag 20F shown in FIGS. 19 and 20 includes a bag main body 21 and a tension cloth 82, and the bag main body 21 has the same configuration as the bag main body 21 in the airbag 20 described above. Therefore, the same members are denoted by the same reference numerals, and detailed description thereof is omitted.

  The tension cloth 82 is formed of a woven fabric made of polyamide yarn, polyester yarn or the like, and has the same configuration except that the outer shape of the tension cloth 58 and the support portion 59 in the airbag 20 is different. The support portion 83, the attachment portion 84 formed on the tip 82b side, and the protruding piece portion 85 constituting the end side attachment piece portion 56 are provided. Similar to the tension cloth 58 in the airbag 20 described above, the base 85a side of the protruding piece 85 is sewn to a portion on the upper edge side of the end-side inflating portion 38 in the bag body 21. The tension cross 82 has a support 83 that covers the vehicle outer side O of the end-side inflating portion 38, has a substantially triangular outer shape, and has a lower end 83a that is arranged to extend downward while projecting rearward, and an end-side section. The base part 82 a coupled to the part 44 is configured to be coupled at a position near the lower end 44 c of the end-side partition part 44. In other words, the support portion 83 of the tension cloth 82 is formed so as to protrude largely downward from the attachment portion 84, and is located near the upper and lower centers where the end-side expansion portion 38 expands most thickly when expansion is completed. The vehicle outer side O of the part 38d can be supported. Therefore, in the airbag 20F using the tension cloth 82 having such a configuration, a wide area in the vertical direction of the end-side inflating portion 38 can be smoothly pushed out to the vehicle interior side I when the airbag 20F is deployed and inflated. Further, since the support portion 83 of the tension cloth 82 covers the vehicle outer side O of the portion 38d near the upper and lower centers, which is the portion that is most thickly expanded in the end side expansion portion 38 when expansion is completed, The vehicle outer side O of the end side inflating part 38 that has completed the above can be stably supported, and the head side of the occupant is more accurately protected by the end side inflating part 38 at the time of oblique collision or rollover. can do.

  In addition, in embodiment, although the air bag of the structure which arrange | positions an end side expansion part on the front-end side of a bag main body is taken as an example, the arrangement position of an end side expansion part is not restricted to embodiment. The end-side inflatable portion may be arranged on the rear end side of the bag body. In the head protection airbag device M according to the embodiment, the end-side attachment piece 56 is configured such that the upper end side is fixed to the inner panel 2 on the body 1 side in the portion of the front pillar portion FP. The fixing position of the attachment piece portion is not limited to the embodiment, and the end-side attachment piece portion is not limited as long as the end-side expansion portion is arranged so that the upper end side covers the inside of the pillar portion when the expansion is completed. It is good also as a structure fixed to the body side of the boundary site | part of a front pillar part and a roof side rail part, or the site | part of the roof side rail part near the front pillar part.

  In the head protection airbag device of the present invention, the amount of upward protrusion of the end attachment portion from the bag body (length in the vertical direction) and the length in the longitudinal direction of the tension belt are changed. By doing so, it is possible to adjust the amount of protrusion of the end side inflatable portion of the airbag at the time of completion of inflation toward the inside of the vehicle (the inclination angle of the end side inflatable portion with respect to the front-rear direction as viewed from the vertical direction side). Specifically, the inclination angle of the end-side inflatable portion in the front-rear direction when the airbag is completely inflated (the amount of protrusion of the front end side toward the inside of the vehicle) is the amount of protrusion upward of the end-side attachment portion (in the up-down direction side). If the amount of protrusion upward of the end side mounting portion is reduced, the inclination angle of the end side inflating portion with respect to the front-rear direction is also reduced, and the end side inflating portion protrudes to the vehicle interior side. The amount is also reduced. Further, if the length dimension of the tension belt on the front-rear direction side is increased, the amount of the inner side of the end-side inflated portion that is pushed by the tension cloth can be reduced. In other words, in the embodiment, the airbag at the time of completion of inflation can be obtained without changing the outer shape of the bag body by changing the amount of upward protrusion of the end side attachment portion and the length dimension of the tension belt in the front-rear direction. It is possible to adjust the amount of protrusion of the end side inflating portion toward the vehicle inner side.

  Therefore, for example, the head protection airbag device disposed on the passenger seat side and the head protection airbag device disposed on the driver seat side are connected to the end side attachment portion and the tension using the same bag body. It is good also as a structure which changes the shape (length dimension) with cloth. Usually, the airbag of the passenger seat airbag device disposed in front of the passenger seat projects farther toward the window side outside the vehicle than the airbag of the steering wheel airbag device disposed in front of the driver seat when the inflation is completed. Therefore, the amount of protrusion of the end side inflatable portion of the airbag arranged on the passenger seat side to the inside of the vehicle is determined by the vehicle in the end side inflating portion of the airbag arranged on the driver seat side. It can also be set to be smaller than the amount of protrusion to the inside. Of course, the adjustment of the amount of protrusion of the end side inflatable portion toward the inside of the vehicle can be achieved by adjusting the outer shape of the passenger seat airbag or the steering wheel airbag that is inflated at a position close to the inside of the vehicle when the inflation is completed. Accordingly, it is possible to set appropriately.

  DESCRIPTION OF SYMBOLS 1 ... Body, 2 ... Inner panel, 4 ... Front pillar garnish, 9 ... Air bag cover, 14 ... Inflator, 20, 20A, 20B, 20C, 20D, 20E, 20F, 20G, 20H ... Air bag, 21, 21A, 21B, 21E ... Bag body, 21a ... Upper edge, 21c ... Front end, 38,38A, 38B, 38E ... End-side inflating part, 39,39A ... General inflating part, 44,44A, 44B ... End-side partition part, 44b ... Rear edge, 54, 54A, 54B ... mounting piece, 55, 55B ... general mounting piece, 56, 56A, 56B, 56G, 56H ... end side mounting piece, 58, 58A ... tension cross, 58a ... base, 58b ... tip, 60 ... mounting portion, 61 ... projecting piece, 61a ... base, 63 ... coupling site, 65, 65D ... tension cross, 65a ... base, 65b ... tip, 8 ... Mounting part, 70 ... Bonding site, 73 ... Tension cross, 73a ... Base part, 73b ... Tip, 76 ... Mounting part, 78 ... Bonding part, 80 ... Slit, 82 ... Tension cross, 82a ... Base part, 82b ... Tip, 84 ... Mounting part, 85 ... Projection piece part, 85a ... Base part, FP ... Front pillar part, RR ... Roof side rail part, W1, W2 ... Window, V ... Vehicle, M ... Head protection airbag device.

Claims (10)

Folded and stored on the upper edge side of the window on the vehicle interior side, the upper edge side is attached and fixed to the vehicle body side, the inflation gas from the inflator is allowed to flow in, and the vehicle interior side of the window protrudes downward Comprising an airbag configured to be deployed and inflated to cover
The airbag is
A bag body having flexibility, inflating the inflating gas so as to cover the inside of the window by flowing the inflation gas into the interior; and
A protruding piece that protrudes from the upper edge side of the bag body and is arranged at a plurality of locations along the front-rear direction, and that fixes the upper edge side of the bag body to the body side of the vehicle;
It is composed of a sheet material having flexibility, and the base side is coupled to one end side in the front-rear direction of the bag body, and the tip side is separated from the end of the bag body. A tension cloth that is fixed to the vehicle body at the periphery of the window;
A head protection airbag device having a configuration comprising:
The bag body is configured to include an end-side inflating portion that is partitioned from the other general inflating portion by the end-side partitioning portion on the end portion in the front-rear direction that is the tension cross side when the inflation is completed,
The end-side inflating portion is configured such that, when the inflating is completed, the upper end side is disposed on the vehicle inner side of the pillar portion that is inclined with respect to the vertical direction on the edge side in the front-rear direction of the window. And, in a state where the bag body is deployed flat, the upper end is configured to substantially coincide with the upper edge of the general expansion portion,
In the state where the tension cloth is arranged so as to cover the vehicle outer side of the end side inflating part, the base part side is configured to be coupled to the end side partition part,
The attachment piece portion includes an end-side attachment piece portion disposed on one end side in the front-rear direction that is the end-side expansion portion side, and a general attachment piece portion disposed on the upper edge side of the general expansion portion. And
The end-side mounting piece is configured to be fixed to the body side at the upper end side, and the amount of upward protrusion from the bag body in a state where the end-side mounting piece is flatly expanded is larger than that of the general mounting piece. A head protection airbag device characterized by being set large.   2. The head according to claim 1, wherein the end-side attachment piece is disposed at a position on the end side in the front-rear direction with respect to the edge portion on the general expansion portion side in the end-side partition portion. Part protection airbag device.   The end side attachment piece portion is formed so as to extend from the tension cloth, and a base portion side is coupled to an upper edge side of the end side inflatable portion in the bag body. 2. The head protection airbag device according to 2.   The head protection airbag device according to claim 3, wherein the end-side attachment piece is disposed at a position that is closer to the end in the front-rear direction than the end-side partition.   The end-side attachment piece is a position that is substantially directly above a coupling site for coupling the tension cloth to the end-side partition, and is more longitudinal than the edge of the end-side partition on the side of the general expansion portion The head protection airbag device according to claim 3, wherein the head protection airbag device is disposed at a position on the end side of the head protection air bag.   The end side attachment piece is separated from the tension cloth and is disposed at a position on the end side in the front-rear direction with respect to the end side partition. The head protection airbag device according to the description.   The end-side attachment piece is a separate body from the tension cloth, and is a position that is substantially directly above a coupling site for coupling the tension cloth to the end-side partition, and the end-side partition in the end-side partition The head protection airbag device according to claim 2, wherein the head protection airbag device is arranged at a position closer to an end portion side in a front-rear direction than an edge portion on a general inflatable portion side.   The said tension cloth is set as the structure penetrated by the slit formed in the edge side of the front-back direction of the said end side expansion | swelling part in the said bag main body. The head protection airbag device described in 1.   The head protection airbag device according to claim 1, wherein the end-side attachment piece portion is disposed at a position that is closer to a center side in the front-rear direction than the end-side partition portion.   10. The head according to claim 9, wherein the end-side attachment piece is configured such that an upper end side is fixed to a region of a roof side rail portion that is continuous with the pillar portion on the upper edge side of the window. Part protection airbag device.

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