JP2015020652A - Air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve airtightness and strength of an opening part for storing an inflator without complicated design.SOLUTION: An inflator 20 includes a plurality of fixing bolts 36 for fixing on a vehicle by penetrating an air bag 16 for side collision protection on an approximate straight line. The air bag 16 for side collision protection includes a reinforcing cloth 25 stuck in a predetermined range including a storage position of the inflator 20. Slits 24 for storing the inflator 20 inside the air bag 16 for side collision protection are formed of a base cloth 21 and the reinforcing cloth 25 of the air bag 16 for side collision protection on opposite sides to each other across an arrangement line over a plurality of through holes 23 for making the plurality of fixing bolts 36 penetrate.

Description

  The present invention relates to an airbag device for restraining an occupant when a vehicle such as an automobile collides.

  2. Description of the Related Art An airbag device that restrains an occupant's body by inflating an airbag with an inflator at various parts around the occupant when a vehicle such as an automobile collides or the vehicle rolls over is known. For example, the side airbag device is incorporated in the seat back portion, and in the event of a side collision, the side airbag portion from the back portion to the occupant and the vehicle body is injected by the gas injected from the inflator. It expands and expands between.

  In such an airbag apparatus, in recent years, a configuration in which an inflator is accommodated in an airbag is employed for the purpose of reducing the weight of the entire apparatus, saving the volume, and reducing the cost. In this case, a retainer that accommodates the entire airbag in a folded state before inflating and deploying becomes unnecessary. However, since it is difficult to sew the base fabric with the inflator stored therein to create a bag airbag, it is necessary to provide the airbag with an opening for storing the inflator later. In this case, since the retainer is unnecessary, there is a concern that the airtightness in the opening portion is lowered and the pressure of the gas ejected from the inflator is lowered.

  Therefore, conventionally, for example, a technique described in Patent Document 1 is disclosed as a technique for suppressing such a decrease in gas pressure. In this prior art, the second opening is provided in the inner panel overlapping the first opening provided in the bag body so as not to overlap the first opening. As a result, the inflator can be easily inserted into the airbag from the outside through the two openings, and since the two openings do not overlap, the gas from the inflator does not pass through in a straight line and suppresses a decrease in gas pressure. it can.

JP 2011-168167 A

  Since tension is applied to the base fabric when the airbag is inflated and deployed, it is necessary to provide sufficient strength as a whole. However, in the above prior art, since there is no need to provide a retainer, there is a concern that stress concentrates on the first opening and the second opening. In order to avoid this, a separate complicated design was required.

  The objective of this invention is providing the airbag apparatus which can improve the airtightness and intensity | strength in the opening part for inflator accommodation, without being based on such a complicated design.

  To achieve the above object, an airbag device according to a first aspect of the present invention is an airbag that inflates and deploys between a wall portion of a vehicle body and an occupant seated on a seat, and is accommodated in the airbag and inflated and deployed. An inflator for injecting a gas for use, wherein the inflator includes a plurality of bolts that pass through the airbag and are fixed to the vehicle in a substantially linear arrangement. The bag has a reinforcing cloth that is bonded to a predetermined range including a storage position of the inflator, and a plurality of through holes that allow the plurality of bolts to pass through slits for storing the inflator inside the airbag. The base fabric of the airbag and the reinforcing fabric are provided on opposite sides with respect to the arrangement line extending over.

  In an emergency such as a side collision of the vehicle, the inflator is activated, and the airbag is inflated and deployed between the passenger and the side wall of the vehicle body by the gas ejected from the inflator. At this time, tension is applied to the base fabric of the airbag. In addition, since the inflator is configured to be stored inside the airbag, it is necessary to provide the airbag with a slit for storing the inflator from the outside. Therefore, airtightness around the slit is also required.

  On the other hand, in the first invention of the present application, the inflator includes a plurality of fixing bolts that pass through the airbag and are fixed to the vehicle in a substantially linear arrangement, and the airbag includes a predetermined position including the storage position of the inflator. A base fabric and a reinforcing fabric for an airbag with respect to an arrangement line that has a reinforcing fabric that is bonded in a range and that has a slit for accommodating an inflator inside an airbag and that extends across a plurality of through holes that allow a plurality of bolts to pass therethrough. And are provided on opposite sides.

  With such a configuration, a plurality of slits arranged on opposite sides with respect to the arrangement line become a labyrinth structure, and the airtightness around the slit is maintained high. Further, when the airbag is inflated and deployed, stress concentration on each slit can be reduced by receiving the tension of the base fabric and the reinforcing fabric of the airbag in a complementary manner. As a result, the airtightness and strength of the opening for storing the inflator can be improved without using a complicated design.

  The airbag device according to a second aspect of the invention is characterized in that, in the first aspect of the invention, the slits are provided in a substantially linear shape and in an arrangement substantially parallel to each other.

  In the second invention of the present application, the slits are all provided in a substantially linear shape and in an arrangement substantially parallel to each other. Thereby, the opening of each slit can be easily overlapped by bending the airbag, and the inflator can be easily accommodated therethrough.

  The airbag device according to a third aspect of the present invention is characterized in that, in the first or second aspect of the invention, each of the slits is disposed substantially parallel to the arrangement line and shorter than the arrangement line.

  In the third invention of the present application, all the slits are arranged substantially parallel to the arrangement line and shorter than the arrangement line. Thereby, since the balance of the tension | tensile_strength which each through-hole on an arrangement | positioning line receives becomes uniform, intensity | strength can be improved by avoiding the concentration of the stress in each slit.

  In the airbag device according to a fourth aspect of the present invention, in any one of the first to third aspects, the slit is provided in a range sandwiched between the inflator and the installation portion on the vehicle side. And

  In the fourth invention of the present application, the slit is provided within a range sandwiched between the inflator and the installation portion on the vehicle side. Thereby, each slit is closed and the base fabric and the reinforcing fabric are in close contact with each other, and the airtightness by the labyrinth structure is improved.

  The airbag device according to a fifth aspect of the present invention is the airbag device according to the first aspect, wherein the airbag includes a plurality of the reinforcing cloths, and the slits provided in the plurality of reinforcing cloths are directly attached to the base cloth or the reinforcing element. The cloths are provided on opposite sides of the arrangement line.

  In the fifth invention of the present application, the airbag includes a plurality of reinforcing cloths, and the slits provided in the plurality of reinforcing cloths are provided on the opposite sides of the arrangement line with the base cloth or the reinforcing cloth directly bonded to each other. The configuration is as follows. Thereby, the airtightness and strength in the opening for accommodating the inflator can be improved regardless of the number of reinforcing cloths and their bonding positions.

  According to the present invention, it is possible to improve the airtightness and strength of the opening for accommodating the inflator without using a complicated design.

1 is a schematic side view of a vehicle seat provided with a side-impact airbag device according to an embodiment of the present invention. It is a figure showing the whole structure of the airbag for a side collision in the state developed in the shape of a plane. FIG. 5 is a development plan view of a base fabric and a reinforcing fabric of a side-impact airbag before being sewn and joined as a bag body. It is a figure showing the whole appearance of an inflator by a perspective view. It is a figure showing the arrangement | positioning relationship at the time of assembling the base fabric of the airbag for a side collision, two reinforcement cloths, and an inflator. It is a figure showing the process of wrapping the whole side impact airbag of the folded state with a protective cover. It is a figure showing the whole external appearance and cross section of the airbag apparatus for side collision. It is a figure which expands and represents the structure of the inflator vicinity in the inside of the side airbag apparatus.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic side view of a seat of an automobile (vehicle) provided with a side-impact airbag device that is an embodiment of the airbag device of the present invention. FIG. (B) has shown the time of inflation of an airbag. The right side in the figure corresponds to the front (traveling direction) of the vehicle, the left side in the figure corresponds to the rear of the vehicle, and the vertical direction in the figure corresponds to the vertical direction as it is. Although not particularly shown in FIG. 1, the front side of the figure corresponds to the right side seen in the traveling direction of the vehicle, and the back side of the figure corresponds to the left side seen in the traveling direction of the vehicle. Hereinafter, the direction of the vehicle installation reference is illustrated as appropriate in each drawing, and description will be made based on the direction.

  In FIG. 1, an occupant 12 is seated on a seat 10. The seat 10 (vehicle seat) has a seat portion 10A, and a backrest portion 10B protrudes upward from the seat portion 10A. A headrest 10C is attached to the top of the backrest 10B.

  The seat 10 is equipped with a side impact airbag device 14 in the backrest portion 10B for restricting the movement of the upper body of the occupant 12 at the time of a side collision or a vehicle rollover due to an accident. The side-impact airbag device 14 is inflated and deployed between a side wall portion (not shown in FIG. 1, located on the front side of the paper surface in FIG. 1) and an occupant 12 seated on the seat 10. A bag 16 (airbag), a protective cover 18 that wraps the entire bag 16 in a folded state, and an inflator 20 that is accommodated in the side airbag 16 and supplies gas for inflation and deployment. (See FIG. 4 and the like described later). The inflator 20 is ignited by an inflator control circuit (not shown).

  As shown in FIG. 1A, in a normal state, the side airbag 16 is housed in the backrest portion 10 </ b> B of the seat 10 while being folded in the protective cover 18. On the other hand, for example, when the automobile has a side collision, the inflator control circuit activates the initiator of the inflator 20. As a result, the inflator 20 is ignited, and as shown in FIG. 1B, the side impact airbag 16 is inflated from the protective cover 18 and the seat 10 (in this embodiment, the fabric and the body side wall in front of the backrest portion 10B). The cloth on the side cloth on the side portion is broken out (not shown in the figure) and is developed between the side wall of the automobile body and the occupant 12. At this time, the side airbag 16 is deployed forward and upward, receives the head and chest of the occupant 12, absorbs the impact, and restricts movement toward the vehicle side.

  FIG. 2 shows a side view showing the overall structure of the side-impact airbag 16 in a state of being flatly developed. In FIG. 2, the side airbag 16 has a first panel 22A and a second panel 22B (not shown in FIG. 2; see FIG. 3 to be described later) formed in substantially the same shape. It is configured as a bag body by connecting together at the rear end of the vehicle installation standard) and by sewing and doubling along the other outer edges along the entire circumference (note that it is not necessarily double) There is no need, it can be single). The first panel 22A is disposed on one side in the vehicle width direction (for example, the side wall side of the body of the automobile), and the second panel 22B is disposed on the other side in the vehicle width direction (for example, the passenger side). FIG. 2 is a side view seen from one side in the vehicle width direction, and shows only the first panel 22A.

  The side airbag 16 is formed in a substantially key shape that extends forward and upward. A substantially circular tip chamber 16a is provided above the front side, and a substantially key-shaped connecting portion 16b is connected from the lower end on the rear side where the inflator 20 (not shown in FIG. 2) is located to the tip chamber 16a. Yes. When the side airbag 16 is inflated and deployed, the tip chamber 16a mainly restrains the head of the occupant 12, and the connecting portion 16b mainly restrains the chest of the occupant 12.

  FIG. 3 shows a developed plan view of the base fabric and the reinforcing fabric of the side airbag 16 before being sewn and joined as a bag body. The front side in the figure corresponds to the inner surface side of the side airbag 16. In the development plan view of the base fabric 21 of the side impact airbag 16 shown in FIG. 3A, the base fabric 21 of the side impact airbag 16 is formed in the substantially same shape as described above. 22A and the second panel 22B are integrally provided. The first panel 22A and the second panel 22B are integrally connected in the vicinity of the storage position of the inflator 20 (corresponding to the lower left end in FIG. 2, see the dotted line in the figure), and in the horizontal direction in the figure Are arranged symmetrically. A boundary line Lb (see the alternate long and short dash line in the figure) of this connecting portion is valley-folded with respect to the base fabric 21, and is configured as a bag body by sewing and joining along the entire outer edge portion. (See FIG. 5 described later).

  Three through holes 23 and one slit 24 are formed in the vicinity of the boundary line Lb in the second panel 22B, that is, in the portion corresponding to the storage position of the inflator 20 at the lower left end in FIG. . The three through holes 23 are holes through which three fixing bolts (bolts) of the inflator 20 to be described later are passed, and are formed so as to be arranged on a substantially straight line in the vertical direction. The slit 24 is formed as an opening for inserting and storing the inflator 20 from the outside to the inside of the side impact airbag 16 that is sewn and joined as a bag body. In the second panel 22B, the slit 24 is formed on the front side of the vehicle installation standard with respect to the arrangement line La (see the two-dot chain line in the drawing) extending over the three through holes 23.

  The side airbag 16 includes two reinforcing cloths 25 having the shape shown in FIG. 3B (only one is shown in the figure). These two reinforcing cloths 25 are for bonding to the base cloth 21 to reinforce the airtightness and strength at the storage position of the inflator 20, both of which store the inflator 20 in the base cloth 21 of FIG. It is formed in the same shape as a range including a position (a range sandwiched between broken lines in FIG. 3A; corresponding to a predetermined range). The two reinforcing cloths 25 are also formed with three through holes 23 and one slit 24, respectively. The three through holes 23 are formed so as to overlap with the second panel 22B in any of the reinforcing cloths 25. However, the slit 24 is formed on the rear side of the vehicle installation reference with respect to the arrangement line La extending over the three through holes 23 in any of the two reinforcing cloths 25.

  Each of the slits 24 formed in each of the second panel 22B and the two reinforcing cloths 25 is linear along the vertical direction, and is shorter than and parallel to the arrangement line La extending over the three through holes 23. It is formed.

  FIG. 4 is a perspective view showing the entire appearance of the inflator 20. In FIG. 4, the inflator 20 includes an inflator body 31 and a retainer 32. The inflator main body 31 has a substantially cylindrical shape as a whole, and is provided with a gas outlet 31a at an end portion on the lower side on the basis of vehicle installation. The retainer 32 is a structural member that holds the inflator body 31 and fixes the inflator body 31 to the seat 10. The retainer 32 is a substantially flat board portion 33 that is long in the vertical direction with respect to the vehicle installation reference, and a clamp portion that holds the inflator body 31. 34 and a deflecting portion 35 for deflecting the direction of gas ejection from the inflator body 31 are integrally provided. The board portion 33 is provided with three fixing bolts 36 arranged in a substantially straight line in the vertical direction on the surface facing the left in the vehicle installation reference. These fixing bolts 36 pass through the side impact airbag 16 and are fastened to structural members (installed portions) inside the seat 10 as will be described later, whereby the entire side impact airbag device 14 is fixed. . The clamp portion 34 clamps the circumferential side portion of the substantially cylindrical inflator body 31 and fixes it to the substrate portion 33. The deflecting unit 35 surrounds the jet port 31a of the inflator body 31 together with the substrate unit 33 in the rear and left and right directions, thereby deflecting the gas ejection direction forward.

  The base fabric 21, the two reinforcing fabrics 25, and the inflator 20 of the side impact airbag 16 are assembled in the arrangement relationship shown in FIG. In addition, in the figure, the 2nd panel 22B of the base fabric 21 is correctly arrange | positioned on the vehicle installation reference | standard, and the 1st panel 22A has shown the state folded at right angle by the boundary line Lb with respect to this. Two reinforcing cloths 25 are attached to the lower end portions of the first panel 22A and the second panel 22B (that is, the storage position of the inflator 20) so as to be sandwiched from the inner side and the outer side. Sewing combined. At this time, the three through holes 23 (and the arrangement line La) overlap each other with the second panel 22B and the two reinforcing cloths 25. The inflator 20 is disposed so that the fixing bolts 36 are passed through the through holes 23 from left to right. The side panel airbag 16 is configured as a bag body by superimposing the first panel 22A on the second panel 22B and sewing and joining the entire periphery along their outer edges.

  However, in the actual manufacturing operation of the side airbag 16, it is difficult to sew and join the outer edge portion with the inflator 20 housed inside. Therefore, the base fabric 21 and the reinforcing fabric 25 are first bonded and sewn together, and the first panel 22A and the second panel 22B are overlapped without sewing the inflator 20, and the outer edges are sewn and joined. The airbag 16 is produced. Thereafter, the inflator 20 is housed in the side impact airbag 16 through the three slits 24, and the three fixing bolts 36 are respectively passed through the through holes 23. Here, although the three slits 24 formed in each of the second panel 22B and the two reinforcing cloths 25 are not arranged so as to overlap each other, they are each formed in a linear shape and in parallel with each other. For this reason, the opening of the three slits 24 can be easily overlapped by bending the side impact airbag 16, and the inflator 20 can be easily accommodated (not shown).

  The side airbag 16 containing the inflator 20 is folded into a substantially rectangular shape by a predetermined folding method, and the whole is wrapped with a protective cover 18 as shown in FIG. The protective cover 18 is a cloth material formed in a substantially cross shape, and a fixing hole 26 is formed at each end. As shown in the drawing, with the back of the side-impact airbag 16 folded into a substantially rectangular shape applied to the central portion of the protective cover 18, each end is bent and the respective fixing holes are inserted into the fixing bolts 36. By doing so, the folding state of the side airbag 16 is fixed.

  In this way, the side-impact airbag device 14 has a substantially rectangular parallelepiped shape as shown in FIG. Fig.7 (a) is the rear view seen from the back side of vehicle installation reference | standard, FIG.7 (b) is a sectional side view seen in the arrow VIIb-VIIb cross section in Fig.7 (a). In this sectional view, the inflator 20 is located on the rear side, and the folded side airbag is located on the front side. The gas ejected from the inflator body 31 is ejected forward by the deflecting portion 35 of the retainer 32, and the side airbag 16 is inflated and deployed forward. Although not particularly illustrated, the protective cover 18 is provided with a perforation having a low strength in a predetermined arrangement. When the side airbag 16 is inflated and deployed, the perforation air is broken by breaking the perforation. The bag 16 jumps out.

  FIG. 8 shows an enlarged view of the configuration in the vicinity of the inflator 20 in FIG. In the drawing, illustration of the folded side airbag 16 and the protective cover 18 is omitted. In FIG. 8, in the vicinity of the storage position of the inflator 20, two reinforcing cloths 25 are bonded to the base cloth 21 of the side airbag 16 so as to be sandwiched between the inside and the outside. Further, the through hole 23 of the second panel 22B and the through hole 23 of each reinforcing cloth 25 are disposed so as to penetrate in the left-right direction. The slits 24 of the second panel 22B are located on the front side of the through holes 23 (arrangement line La), whereas the slits 24 of the two reinforcing cloths 25 are located on the rear side of the through holes 23. Yes. That is, the slit 24 of the second panel 22 </ b> B and the slit 24 of each reinforcing cloth 25 are disposed symmetrically with respect to the through hole 23 in the front-rear direction (on opposite sides). Then, the fixing bolt 36 of the retainer 32 passes through the second panel 22B and the through holes 23 of the two reinforcing cloths 25 and is fastened to a structural member in the sheet 10 (not shown), whereby the base plate portion 33 of the retainer 32 is secured. And the structural members are pressed and sandwiched so as to close the slits 24 of the second panel 22B and the two reinforcing cloths 25, respectively.

  In the configuration as described above, when gas is ejected from the inflator body 31, the three slits 24 arranged in a staggered manner have a labyrinth structure to directly reduce the gas pressure to the outside of the side airbag 16. Can be suppressed. That is, while each slit 24 is formed to have a size that allows the inflator 20 to be inserted, the airtightness around the slit 24 is kept high.

  Further, when the side airbag 16 is inflated and deployed, tension is applied to both the first panel 22A and the second panel 22B, but the second panel 22B and the two reinforcing cloths 25 are mutually connected. By receiving the tension in a complementary manner, the stress concentration on each slit 24 can be relaxed. Specifically, the tension applied to the first panel 22 </ b> A is transmitted to the second panel 22 </ b> B at the rear side of the through hole 23 and received by the fixing bolt 36. The stress concentration on the slit 24 of each reinforcing cloth 25 can be alleviated. Further, the tension applied to the second panel 22B is transmitted to the two reinforcing cloths 25 at the front side of the through hole 23 and is received by the fixing bolts 36, and therefore is positioned on the front side of the through hole 23. The stress concentration on the slit 24 of the second panel 22B can be relaxed.

  According to the side airbag device 14 of the embodiment described above, the following effects can be obtained. That is, in the present embodiment, the inflator 20 includes a plurality of fixing bolts 36 that pass through the side impact airbag 16 and are fixed to the vehicle in a substantially linear arrangement. A plurality of reinforcing bolts 25 are attached to each other within a predetermined range including the storage position of the inflator 20, and a plurality of slits 24 for storing the inflator 20 inside the side airbag 16 are passed through the plurality of fixing bolts 36. The base cloth 21 and the reinforcing cloth 25 of the side impact airbag 16 are provided on opposite sides of the arrangement line La across the through hole 23. With such a configuration, the three slits 24 arranged in a staggered manner have a labyrinth structure, and the airtightness around the slit 24 is maintained high. Further, when the side airbag 16 is inflated and deployed, tension is applied to both the first panel 22A and the second panel 22B, but the second panel 22B and the two reinforcing cloths 25 are mutually connected. By receiving the tension in a complementary manner, the stress concentration on each slit 24 can be relaxed. As a result, according to the present embodiment, the airtightness and strength of the slit 24 for housing the inflator 20 in the side airbag 16 can be improved without complicated design.

  In the present embodiment, in particular, the slits 24 of the base fabric 21 and the reinforcing fabrics 25 are both provided in a substantially linear shape and in an arrangement substantially parallel to each other. With such a configuration, the openings of the slits 24 can be easily overlapped by bending the side-impact airbag 16, and the inflator 20 can be easily accommodated therethrough.

  In the present embodiment, in particular, the slits 24 of the base fabric 21 and the reinforcing fabrics 25 are both arranged substantially parallel to the arrangement line La of the through holes 23 and shorter than the arrangement line La. With such a configuration, the balance of the tension received by each through hole 23 on the arrangement line La is equalized, so that the concentration of stress in each slit 24 can be avoided and the strength can be improved.

  In the present embodiment, in particular, the slits 24 of the base fabric 21 and the reinforcing fabrics 25 are provided in a range sandwiched between the base plate portion 33 of the inflator 20 and the installation portion on the vehicle side. With such a configuration, each slit 24 is closed and the base fabric 21 and the reinforcing fabric 25 are in close contact with each other, and the airtightness due to the labyrinth structure is improved.

  In the above-described embodiment, the two reinforcing cloths 25 are bonded and sewn together so as to sandwich the inner surface side and the outer surface side of the base fabric 21, but the present invention is not limited to this. In addition, three or more reinforcing cloths 25 may be bonded together, or a plurality of reinforcing cloths 25 may be bonded only to either the inner surface side or the outer surface side of the base fabric 21. In this case, the base cloth 21 or the reinforcing cloth 25 that are directly bonded to each other in order to obtain the above-described labyrinth structure for achieving airtightness and because the base cloth 21 and the reinforcing cloth 25 receive complementary tension. What is necessary is just to provide the slit 24 on the opposite side with respect to the arrangement line La between each other (not shown).

  Moreover, although the said embodiment demonstrated the example which applied this invention with respect to the side airbag which inflate-deploys between the body side wall part and the passenger | crew 12 from the seat | sheet 10 (namely, to the collision side with respect to the passenger | crew 12), For a side airbag (so-called far-side airbag) that inflates and deploys and restrains the occupant 12 on the opposite side of the body side wall with respect to the occupant 12 (ie, on the opposite side of the collision side with respect to the occupant 12), The present invention may be applied.

  Further, in the above embodiment, the case where the present invention is applied to a so-called seat mount type side airbag device equipped in the backrest portion 10B of the seat 10 has been described as an example. The present invention may be applied to a so-called door mount type side airbag device mounted on a door.

  Moreover, although the said embodiment demonstrated the example applied to the side impact airbag apparatus, the airbag apparatus of this invention is not restricted to this. In addition, the present invention may be applied to a knee airbag device for protecting the knees and legs of the occupant 12.

  In addition to those already described above, the methods according to the above-described embodiments and modifications may be used in appropriate combination. In addition, although not illustrated one by one, the present invention is implemented with various modifications within a range not departing from the gist thereof.

10 Seat 12 Crew 14 Side Impact Airbag Device 16 Side Impact Airbag (Airbag)
20 Inflator 21 Base cloth 22A First panel 22B Second panel 23 Through hole 24 Slit 25 Reinforcement cloth 31 Inflator body 32 Retainer 36 Fixing bolt (bolt)
La placement line

Claims (5)

An airbag that inflates and deploys between a wall of the vehicle body and an occupant seated on the seat;
An inflator that is housed in the airbag and injects a gas for inflation and deployment,
The inflator is
A plurality of bolts for passing through the airbag and fixing to the vehicle are provided in a substantially linear arrangement,
The airbag is
Having a reinforcing cloth bonded together in a predetermined range including the storage position of the inflator;
A slit for accommodating the inflator inside the airbag is arranged on the opposite side between the base cloth of the airbag and the reinforcing cloth with respect to an arrangement line extending through a plurality of through holes through which the plurality of bolts are passed. An airbag device comprising the airbag device.   2. The airbag device according to claim 1, wherein the slits are provided substantially in a straight line and in an arrangement substantially parallel to each other.   3. The airbag device according to claim 1, wherein each of the slits is disposed substantially parallel to the arrangement line and shorter than the arrangement line.   The airbag device according to any one of claims 1 to 3, wherein the slit is provided in a range sandwiched between the inflator and the installation portion on the vehicle side. The airbag includes a plurality of the reinforcing cloths, and the slits provided in the plurality of reinforcing cloths are provided on the opposite sides of the arrangement line with the base cloth or the reinforcing cloth directly bonded to each other. The airbag device according to any one of claims 1 to 4, wherein the airbag device is provided.

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