JPH0659164U - Mounting structure for bag for airbag device - Google Patents

Abstract

(57) [Summary] [Purpose] To shorten the bag manufacturing process and minimize the amount of base material used. [Structure] An outer peripheral portion of a mounting opening 16 formed in the bag body 10 is in contact with a base plate 26 to which an inflator 18 is fixed. The outer peripheral portion of the mounting port 16 is held between the base plate 26 and the mounting ring 42. A holding plate 30 is arranged on the occupant side of the base plate 26 (direction of arrow A). A through hole 32 is formed in the holding plate 30 so that the cylindrical portion 18A of the inflator 18 penetrates therethrough. Holding board 3
0, a plurality of claws are arranged on the outer periphery of the through hole 32.
A holding plate 38 having claws of the same shape and having a through hole 40 is disposed so as to face the holding plate 30.
0 and the holding plate 38 hold the outer peripheral portion of the mounting opening 16 of the lower cloth 14. An insertion hole through which a claw penetrates is formed in the outer peripheral portion of the mounting opening 16 of the lower cloth 14. The holding plates 30 and 38 are provided with recesses, and when the outer peripheral portion of the mounting opening 16 is held, the claws are fitted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bag body attachment structure for an airbag device.

[0002]

[Prior art]

 As shown in FIG. 12, the bag body 60 used in the airbag device attached to the steering wheel is formed by stitching the outer peripheries of the upper cloth 62 and the lower cloth 64. The upper cloth 62 is arranged on the occupant side, and a circular mounting opening 66 provided at the center of the lower cloth 64 is inserted into the cylindrical portion 68A of the inflator 68.

In such an airbag device, gas is generated from the inflator 68 having a gas generating substance at the time of a vehicle collision, and the bag body 60 accommodated in the folded state is inflated and expanded by the gas, which is shown in the drawing. Not present Between the steering wheel and the occupant to protect the occupant. At that time, the inner periphery of the mounting opening 66 of the lower cloth 64 may be deteriorated by the hot air of the gas ejected from the inflator 68.

Therefore, conventionally, the peripheral portion of the mounting opening 66 of the lower cloth 64 is reinforced by the following method. That is, as shown in FIG. 13, two reinforcing cloths 70 are provided on the front side and one reinforcing cloth 72 is provided on the back side of the central portion of the lower cloth 64 which is cut into a circular shape along the solid line portion indicated by the arrow A. The stitches are sewn and cut in a circular shape along the chain line portion indicated by the arrow B to form the attachment port 66. Next, as shown in FIGS. 14 and 15, the reinforcing cloth 70 sewn on the front side is folded back in the direction of arrow C 1. Next, as shown in FIG. 16, the reinforcing cloth 70 folded back in this manner is bent together with the edge portion of the mounting opening 66, and is sewn to the lower cloth 64 together with the reinforcing cloth 72 sewn on the back side. In addition, the threads are coated with silicone to protect them.

[0005]

[Problems to be solved by the device]

 However, the sewing process of sewing the reinforcing cloths 70 and 72 is complicated, and the coating / drying process of applying silicon to the sewn threads and drying the same takes time, resulting in a high manufacturing cost. Further, as shown in FIG. 17, not only the upper cloth 62 and the lower cloth 64 but also the reinforcing cloths 70 and 72 must be cut from one piece of the base cloth material 74, so that a predetermined cutting interval (D1 ) Is required, a waste is generated in the base cloth material 74 in which the heat resistant elastomer is coated on the woven cloth, and the material cost is increased. The reinforcing cloth 76 reinforces the vent hole that limits the expansion of the bag body 60.

In consideration of the above facts, the present invention is an air that can shorten the bag manufacturing process and minimize the amount of base cloth material used while maintaining the strength required for the bag mounting port. An object of the present invention is to provide a mounting structure for a bag device bag.

[0007]

[Means for Solving the Problems]

 According to the attachment structure of the bag body for an airbag device according to claim 1, an inflator for injecting gas, which is fixed to a base plate, is inserted into an inside from an attachment opening formed in the bag body, and In a mounting structure of a bag body for an airbag device in which an outer peripheral portion is held by the base plate and a ring plate and attached to the base plate, an outer peripheral portion of the mounting port is held by first and second holding plates. Further, in this state, the first and second holding plates are held and fixed by the base plate and the ring plate.

According to a second aspect of the present invention, there is provided a bag body mounting structure for an airbag apparatus, wherein an outer peripheral portion of a mounting port of the bag body is provided on a surface where the first holding plate and the second holding plate face each other. It is characterized by forming a claw and a recess that penetrate through the hole and can be fitted to each other.

According to a third aspect of the present invention, there is provided a bag body mounting structure for an airbag device, wherein a heat-resistant sheet material is disposed inside the bag body at an outer peripheral portion of a mounting port of the bag body, It is characterized in that a convex portion and a concave portion which can be fitted to each other while holding the sheet material and the bag body are formed on a surface where the first holding plate and the second holding plate face each other.

[0010]

[Action]

 According to the attachment structure of the airbag device according to the first aspect of the invention, the base plate and the ring plate hold and fix the first and second holding plates. These first and second holding plates reinforce while holding the outer peripheral portion of the mounting opening formed in the bag body. Therefore, the strength required for this mounting port is maintained without the use of reinforcing cloth. Therefore, it is not necessary to sew a reinforcing cloth to the peripheral portion of the mounting opening, the manufacturing process of the bag body can be shortened, the amount of the base cloth material used can be minimized, and the manufacturing cost / material cost can be reduced. it can.

Further, according to the attachment structure of the bag body for an airbag device according to the second aspect, the claws and the recesses are provided on the surfaces of the first holding plate and the second holding plate that face each other. There is. These claws and recesses penetrate the outer periphery of the mounting port and are fitted together. For this reason, the reaction force generated by the impact force when the air bag is inflated and deployed disperses and acts on the bag body through the claws. Therefore, the attachment port of the bag body is less likely to be broken.

According to the attachment structure of the bag body for an airbag device according to the third aspect, the operation is performed as follows.

A heat-resistant sheet material is disposed inside the bag body at the outer peripheral portion of the attachment port of the bag body, and the opposing surfaces of the first holding plate and the second holding plate include: A convex portion and a concave portion are provided. The convex portion and the concave portion are fitted to each other while holding the sheet material and the bag body. Therefore, the reaction force generated by the impact force when the airbag is inflated and deployed disperses and acts on the bag body through the convex portion and the concave portion. Therefore, the attachment port of the bag body is less likely to be broken.

[0014]

【Example】

 1 and 2 show a mounting structure of a bag body for an airbag device according to a first embodiment of the present invention. The bag 10 has a bag-like shape in which the outer peripheral portions of a circular upper cloth 12 and a lower cloth 14 (see FIG. 3) are sewn with a thread 10A and inverted. As the upper cloth 12 and the lower cloth 14, woven cloth coated with a heat-resistant elastomer is used. A circular mounting port 16 is cut out at the center of the lower cloth 14. The cylindrical portion 18A of the inflator 18 is inserted into the mounting opening 16, and the cylindrical portion 18A is included in the bag body 10. Further, as shown in FIG. 4, a bolt hole 14A and an insertion hole 14B are circumferentially formed in the outer peripheral portion of the mounting port 16.

A disk-shaped flange 24 is formed at an axially intermediate portion of the inflator 18 so as to expand in the radial direction of the inflator 18. The flange 24 is fixed to the lower surface of the base plate 26, and the cylindrical portion 18A of the inflator 18 is projected into the bag body 10 through a through hole 28 formed in the central portion of the base plate 26. A bolt hole 24A is formed on the outer periphery of the flange 24, and a bolt hole 26A is formed on the outer periphery of the through hole 28. The base plate 26 is supported substantially parallel to a hub of a steering wheel (not shown).

On the occupant side of the base plate 26 (direction of arrow A), a disc-shaped holding plate 30 made of resin is arranged. A through hole 32 is formed in the center of the holding plate 30 so that the cylindrical portion 18A of the inflator 18 passes therethrough. Further, as shown in FIG. 2, the holding plate 30 is provided with a plurality of conical claws 34 each having a sharp tip at the outer periphery of the through hole 32. A holding plate 38 having a claw 36 having the same shape as the claw 34 and facing the holding plate 30 and having a through hole 40 in the center is disposed. The holding plate 30 and the holding plate 38 form a lower cloth 14 The outer peripheral portion of the mounting port 16 is held. As shown in FIG. 4, an insertion hole 14B through which the claws 34, 36 penetrate is formed in the outer peripheral portion of the mounting opening 16 of the lower cloth 14. On the other hand, the holding plate 38 is provided with a concave portion 38B so that when the holding plate 30 and the holding plate 38 hold the outer peripheral portion of the mounting port 16, the claw 34 is fitted. Further, the holding plate 30 is also provided with a concave portion 30B so that the claw 36 can be fitted therein (see FIG. 2). A bolt hole 30A is formed on the outer periphery of the through hole 32, and a bolt hole 38A is formed on the outer periphery of the through hole 40. A bolt hole 14A is also formed on the outer periphery of the mounting port 16.

A disc-shaped mounting ring 42 having an outer diameter smaller than that of the holding plate 38 is disposed on the inside of the bag body 10 of the holding plate 38. A through hole 44 is provided in the center of the attachment ring 42, and the cylindrical portion 18A of the inflator 18 is inserted therein. In addition, bolt holes 42A are formed at a plurality of locations on the outer periphery of the attachment ring 42. These bolt holes 42A, 38A, 14A, 30A, 26A, 24A are coaxially positioned and the bolt 48 is inserted. The tip of the bolt 48 projects from the flange 24, and a nut 54 is attached to the tip to fasten each member.

The operation of the present embodiment will be described below through the assembling work of the bag body 10. As shown in FIG. 3, the upper cloth 12, the lower cloth 14, and the reinforcing cloth 52 for the vent holes are cut from the base cloth material 50. A mounting port 16 is formed in the center of the lower cloth 14, and a reinforcing fabric 52 is sewn around the mounting port 16 to form a vent hole. Therefore, it is not necessary to cut the reinforcing cloths 70 and 72 of the mounting opening from the base cloth material 74 as in the conventional case, so that the cutting interval is reduced from the conventional D1 (see FIG. 17) to D2, and the work-in-progress area is reduced. Can be reduced, the material cost can be suppressed, and the process can be shortened. Next, the outer peripheral portions of the upper cloth 12 and the lower cloth 14 are sewn together with the thread 10A, and the upper cloth 12 is pulled out from the mounting opening 16 and inverted to form the bag body 10 (see FIG. 1).

Next, the bag body 10 is folded so that it can be housed in a pad cover (not shown), and the mounting ring 42 and the holding plate 38 are installed inside the bag body 10 with the bolts 48 inserted through the bolt holes 42A. Next, the claws 34 of the holding plate 30 are inserted into the insertion holes 14B, and the inside and outside of the outer peripheral portion of the attachment port 16 are held by the holding plate 30 and the holding plate 38. At that time, the claw 36 fits into the recess 30B of the holding plate 30, and the claw 34 fits into the recess 38B of the holding plate 38. Next, with the outer peripheral portion of the mounting opening 16 being held by the holding plate 30 and the holding plate 38, the bolt holes 30A, 14A, 38A drilled in each member are coaxially positioned and inserted into the mounting ring 42. Inserting bolts 48 into these bolt holes 30A, 14A, 38.

Next, the base plate 26 is attached to the holding plate 30, and the bolt 48 is inserted into the bolt hole 26A. Next, the cylindrical portion 18A of the inflator 18 is inserted into the bag body 10, and the bolt 48 is inserted into the bolt hole 24A of the flange 24. Next, the nuts 54 are attached to the tips of the bolts 48 protruding from the bolt holes 24A of the flange 24 to fasten each member. Thereafter, the unitized bag body 10 and the inflator 18 are attached to a steering wheel (not shown).

As a result, the reinforcing cloth is sewn to the peripheral portion of the mounting portion 16 as in the conventional case, and the reinforcing cloth is folded back and further sewn to the bag body. The coating / drying step of coating and drying silicon can be omitted.

In addition, when the vehicle collides with the airbag device, the starter is activated, gas is ejected from the inflator 18 having the built-in gas generator into the bag body 10, and the bag body 10 is filled with the gas. Although it is in a state and expands and deploys, at this time, as shown in FIG. 4, an impact force P1 acts in the direction of the arrow near the attachment opening 16 of the lower cloth 14. Further, the reaction force P2 acts on the bolt hole 14A of the lower cloth 14 in the direction opposite to P1. Similarly, a reaction force P3 is generated in each of the insertion holes 14B. In this way, the reaction forces P2 and P3 generated by the impact force P1 are dispersed and act on the bolt holes 14A and the insertion holes 14B, so that the impact force P1 does not concentrate on one place and the lower cloth 14 The bolt hole 14A is not broken.

Further, since the holding plate 38 larger than the outer diameter of the mounting ring 42 is attached, the bag body 10 can be protected from the hot air generated when gas is ejected from the inflator 18.

Next, a mounting structure of a bag body for an airbag device according to a second embodiment of the present invention is shown in FIGS. 5 to 9, and the present embodiment will be described based on these drawings. The same members as those described in the first embodiment are designated by the same reference numerals, and the duplicate description will be omitted.

As shown in FIGS. 5 and 6, a quadrangular plate-shaped flange 124 protruding in the radial direction of the inflator 18 is formed at an axially intermediate portion of the inflator 18. The flange 124 is fixed to the lower surface of the base plate 126, and the cylindrical portion 18A of the inflator 18 projects into the bag body 10 through a through hole 28 formed in the central portion of the base plate 126. Further, four bolt holes 124A are formed on the outer periphery of the flange 124, and four bolt holes 126A are similarly formed on the outer periphery of the through hole 28. The base plate 126 is supported substantially parallel to the hub of a steering wheel (not shown).

On the occupant side (the direction of arrow A) of the base plate 126, a holding plate 130 made of resin and having a rectangular shape and having substantially the same size as the base plate 126 is arranged. A through hole 32 is formed in the center of the holding plate 130, and a cylindrical portion 18A of the inflator 18 penetrates therethrough.

Further, as shown in FIGS. 7 and 9, in the holding plate 130, a convex portion 134 protruding so that the cross section shown in FIG. 9 has a semicircular shape is formed along the outer periphery of the through hole 32. A plurality of them are installed. As shown in FIGS. 5 and 6, a through hole 40 is formed in the center of the holding plate 130 so as to face the holding plate 130, and a holding plate 138 having the same size as the holding plate 130 is provided. .

The lower cloth 14 is located between the pair of holding plates 130 and 138, and further, between the lower cloth 14 and the holding plate 138 in order to protect the bag body 10 from the hot air at the time of a vehicle collision. A rubber sheet 112, which is a sheet material having heat resistance, is provided. The rubber sheet 112 is formed in a disk shape having an outer shape larger than the holding plates 130 and 138. A through hole 114 is bored in the center of the rubber sheet 112, and four holes are provided near the outer circumference. A bolt hole 112A is formed.

Therefore, the pair of holding plates 130 and 138 hold the outer peripheral portion of the mounting port 16 of the lower cloth 14 and the outer peripheral portion of the through hole 114 of the rubber sheet 112. Unlike the first embodiment, the outer peripheral portion of the attachment opening 16 of the lower cloth 14 is not provided with an insertion hole through which the convex portion 134 penetrates.

Further, in the holding plate 138, a plurality of concave portions 139 that are depressed in a semicircular shape corresponding to the convex portions 134 are arranged in an annular shape along the outer periphery of the through hole 40, and the holding plate 130 and the holding plate 138 are provided. When the outer peripheral portion of the mounting port 16 and the outer peripheral portion of the through hole 114 of the rubber sheet 112 are clamped, the convex portion 134 and the concave portion 139 are fitted together.

It should be noted that four bolt holes 130 A are formed on the outer periphery of the through hole 32, and four bolt holes 138 A are also formed on the outer periphery of the through hole 40. Further, four bolt holes 14A are also formed on the outer periphery of the mounting opening 16.

Further, along the same circumference as the convex portion 134 and the concave portion 139 annularly provided on the holding plates 130 and 138, eight rivet holes 130B and 138B into which the pop rivets 120 are inserted are provided. The holding plates 130 and 138 are provided with holes, and the lower cloth 14 and the rubber sheet 112 are also provided with rivet holes 14B and 112B, respectively.

The holding plate 138 located on the inner side of the bag body 10 is provided with a mounting ring 142 having a rectangular shape having substantially the same size as the base plate 126. A through hole 44 is provided in the center of the attachment ring 142, and the cylindrical portion 18A of the inflator 18 is inserted therein. Further, four bolt holes 142 A are formed on the outer circumference of the mounting ring 142. The mounting ring 142 and the base plate 126 are also provided with rivet holes 142B and 126B corresponding to the rivet holes 130B and 138B of the holding plates 130 and 138, respectively.

From the above, the bolt holes 142A, 138A, 112A, 14A, 130A, 126A, 124A are coaxially positioned and the bolt 48 is inserted. The tip of the bolt 48 projects from the flange 124, and a nut 54 is attached to the tip to fasten each member. Further, the rivet holes 142B, 138B, 112B, 14B, 130B and 126B are coaxially positioned, and the pop rivet 120 is inserted therethrough. Therefore, each member is fastened by the pop rivet 120.

Next, the assembling work of the bag body 10 according to the embodiment will be described. Similar to the first embodiment, the bag body 10 is folded and the mounting ring 142, the holding plate 138 and the rubber sheet 112 are installed inside the bag body 10 with the bolts 48 inserted through the bolt holes 142A. Then, the outer peripheral portion of the mounting port 16 and the outer peripheral portion of the through hole 114 of the rubber sheet 112 are held by the holding plate 130 and the holding plate 138.

At that time, while the lower cloth 14 and the rubber sheet 112 are being held, the projections 134 of the holding plate 130 are fitted in the recesses 139 of the holding plate 138, and in this state, the bolts inserted in the mounting ring 142. Insert 48 into these bolt holes 130A, 14A, 112A, 138A.

Further, similar to the first embodiment, the base plate 126 is attached to the holding plate 130, the cylindrical portion 18A of the inflator 18 is inserted into the bag body 10, and the bolt protruding from the bolt hole 124A of the flange 124 is inserted. A nut 54 is attached to the tip of 48 to fasten each member.

On the other hand, at the time of a vehicle collision, it operates as follows. At the time of a vehicle collision, the bag body 10 of the airbag device is inflated and deployed as in the first embodiment. At this time, as shown in FIG. The force P1 acts. Further, the reaction force P2 acts on the bolt hole 14A of the lower cloth 14 in the opposite direction of the impact force P1, and the reaction force P4 acts on the rivet hole 14B of the lower cloth 14. Similarly, a reaction force P5 is generated at the fitting portion between the convex portion 134 and the concave portion 139, respectively.

In this way, the reaction forces P2, P4, and P5 generated by the impact force P1 are dispersed and act on the bolt hole 14A, the rivet hole 14B, and the pinched portion between the convex portion 134 and the concave portion 139, so that there is only one place. The impact force P1 does not act on the lower cloth 14 and the bolt hole 14A of the lower cloth 14 is not broken.

Further, since the rubber sheet 112 that is larger than the outer shape of the mounting ring 142 is mounted, the bag body 10 can be protected from the hot air generated when the gas is ejected from the inflator 18, and the mounting ring 142 is small in size. Will be realized. Also, according to this embodiment, as in the first embodiment, the laborious sewing process and the coating / drying process of coating and drying silicon can be omitted.

Next, FIG. 10 shows an attachment structure of a bag body for an airbag device according to a third embodiment of the present invention, and this embodiment will be described based on this drawing. The same members as those described in the first and second embodiments are designated by the same reference numerals, and duplicated description will be omitted.

As shown in FIG. 10 showing the holding plate 130 as an example, in this embodiment, the lower cloth 14, the base plate 126, the holding plates 130 and 138, the rubber sheet 112, the mounting ring 142 and the like are fastened with the pop rivets 120. It is stopped and only tightened with the bolt 48 and the nut 54.

As a result, although the reaction force P4 is not generated, if the protrusion 134 and the recess 139 are sufficiently clamped to each other, reaction forces P2 and P5 generated at the time of a vehicle collision cause the bolt hole 14A of the lower cloth 14. Will not be broken.

Furthermore, according to this embodiment, the pop rivet 120 and the rivet hole corresponding to the pop rivet 120 are not required, and the manufacturing cost of the airbag device can be reduced.

In addition, in the second and third embodiments, the convex portion 134 protruding in a semicircular shape and the concave portion 139 concave in a semicircular shape are used, respectively, but in the present invention, as shown in FIG. It is also possible to adopt a modified example in place of the convex portion 134 and the concave portion 139.

That is, as shown in FIG. 11A, a convex portion 134A and a concave portion 139A each having an acute cross section are used, and as shown in FIG. 11B, a triangular convex portion whose cross section is obtuse is formed. 134B and the concave portion 139B may be used, or as shown in FIG. 11C, the convex portion 134C and the concave portion 139C having a wedge-shaped cross section may be used, and in this case, the same as in the second and third embodiments. It goes without saying that it has an effect.

Further, in the second and third embodiments, the convex portion 134 is provided on the holding plate 130, and the concave portion 139 is provided on the holding plate 138. On the contrary, the convex portion 134 is provided on the holding plate 138. The recesses 139 may be provided on the holding plates 130, or the projections 134 and the recesses 139 may be mixed and provided on the holding plates 130 and 138, respectively.

[0048]

[Effect of device]

 As described above, since the structure for mounting the bag body for the airbag device according to the present invention has the above-described configuration, the bag body manufacturing process can be shortened while maintaining the strength required for the bag body mounting port. It has an excellent effect that the amount of base fabric material used can be minimized.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a bag body to which a structure for mounting a bag body for an airbag device according to a first embodiment of the present invention is applied.

FIG. 2 is an explanatory diagram showing a state in which the holding plate applied to the first embodiment of the present invention is holding the bag body.

FIG. 3 is an explanatory view showing a method of cutting an upper cloth, a lower cloth and the like from a base cloth material.

FIG. 4 is an explanatory view showing a state in which an impact force is applied to an inflator attachment portion of the attachment structure for the airbag device bag body according to the first embodiment of the present invention.

FIG. 5 is an exploded perspective view of a mounting structure for a bag body for an airbag device according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a bag body to which an air bag device bag body mounting structure according to a second embodiment of the present invention is applied.

FIG. 7 is a plan view showing a sandwiching plate applied to a structure for attaching a bag body for an airbag device according to a second embodiment of the present invention.

FIG. 8 is an explanatory view showing a state in which an impact force is applied to an inflator attachment portion of the attachment structure of the airbag device bag body according to the second embodiment of the present invention.

FIG. 9 is an explanatory diagram showing a state in which the holding plate applied to the second embodiment of the present invention is holding the bag body.

FIG. 10 is a plan view showing a holding plate applied to a bag body attachment structure for an airbag device according to a third embodiment of the present invention.

FIG. 11 is a cross-sectional view showing another example of the convex portion and the concave portion applied to the attachment structure for the airbag device bag according to the second and third embodiments of the present invention.

FIG. 12 is a cross-sectional view showing an inflator mounting portion of a conventional bag body.

FIG. 13 is a step diagram of a conventional method for reinforcing the peripheral edge of the inflator mounting portion of the bag.

FIG. 14 is a process drawing of a conventional method for reinforcing the peripheral edge of the inflator mounting portion of the bag body.

FIG. 15 is a process drawing of a conventional method for reinforcing the peripheral edge of the inflator mounting portion of the bag body.

FIG. 16 is a step diagram of a conventional method for reinforcing the peripheral edge of the inflator mounting portion of the bag.

FIG. 17 is an explanatory diagram showing a conventional cutting method.

[Explanation of symbols]

 10 Bag Body 16 Mounting Port 18 Inflator 26 Base Plate (Base Plate) 30 Holding Plate (Second Holding Plate) 30B Recess 34 Claw 36 Claw 38 Holding Plate (First Holding Plate) 38B Recess 42 Mounting Ring (Ring Plate) 112 Rubber sheet (sheet material) 126 Base plate (base plate) 130 Holding plate (second holding plate) 134 Convex portion 138 Holding plate (first holding plate) 139 Recessed portion 142 Mounting ring (ring plate)

Claims (3)

[Scope of utility model registration request] 1. An inflator for ejecting gas, which is fixed to a base plate, is inserted into an inside from an attachment opening formed in a bag body, and an outer peripheral portion of the attachment opening of the bag body is held by the base plate and a ring plate. In the attachment structure of the bag body for an airbag device attached to the base plate, the outer peripheral portion of the attachment opening is held by the first and second holding plates, and in this state, the first and second holding members are held. A structure for mounting a bag body for an airbag device, wherein the plate is sandwiched and fixed by the base plate and the ring plate. 2. A claw and a recess, which penetrate the outer peripheral portion of the mounting opening of the bag body and can be fitted to each other, are formed on a surface where the first holding plate and the second holding plate face each other. The mounting structure for a bag body for an airbag device according to claim 1, characterized in that. 3. A heat-resistant sheet material is disposed inside the bag body at an outer peripheral portion of an attachment port of the bag body, and the first holding plate and the second holding plate face each other. The mounting structure for the airbag apparatus bag body according to claim 1, wherein a convex portion and a concave portion capable of being fitted to each other while sandwiching the sheet material and the bag body are formed on the surface.