JPH04201757A - Air bag mounting structure for air bag device - Google Patents

Abstract

PURPOSE:To facilitate work for fixing an air bag while increasing rigidity of a gas introducing port peripheral part by forming a synthetic resin-made molded part in the peripheral edge part of a gas introducing port of the air bag. CONSTITUTION:An air bag 16 is provided with an accepting port 18 for accepting a point end side of an inflator 14, and a peripheral edge part of this accepting port 18 of the air bag is held between itself and a peripheral edge part of a mounting port 12 by a retaining ring 20. Here by arranging a ring-shaped reinforcing cloth 17 in the inflator accepting port 18 of the air bag 16, a thin synthetic resin-made ring-shaped sheet 26 is formed by injection molding in both obverse/reverse surfaces in a peripheral edge part of the reinforcing cloth. A plurality of protrusions 30 are each provided in this ring-shaped sheet 26. After inserting the protrusions 30 to openings 36, 38 while stud bolts 28 to bolt holes 34B, 34C, the inflator is mounted to a retainer 10 by utilizing the stud bolts 28.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to the structure of mounting an airbag in an airbag device that deploys to protect occupants during a vehicle collision.

[Prior Art] In an emergency such as a vehicle collision, an airbag device installed on a fixed part of the vehicle body in front of the seats of a car is instantly activated by the pressure of reaction gas released from a gas generator fixed to the steering wheel or dash board. Inflate (deploy) the airbag
This is to protect the occupants.

FIG. 9 is a sectional view showing an example of a conventional airbag device, and FIG. 10 is an enlarged sectional view of section A in FIG.

In these figures, lO is a member for attaching an airbag called a retainer, and an inflator 14 is fitted into an inflator attachment opening 12 at the center of the retainer 10.

The airbag 16 includes a receiving port 18 for receiving the distal end side of the inflator 14, and this receiving port 18 is arranged at the peripheral edge of the mounting port 12. This intake port 18 is also a gas introduction port for introducing gas released from the inflator 14 into the airbag 16. This airbag intake port 1
The peripheral edge of the airbag 8 is held between the peripheral edge of the attachment port 12 by a retaining ring 20, thereby fixing the airbag 16 to the retainer 10.

The airbag 16 is in a folded state so that it can be deployed, and is covered with a module cover 22. This module cover 22 is designed so that the airbag 16 is connected to the inflator 1.
4, the airbag 16 is ruptured by the inflation pressure of the airbag 16.

Conventionally, the retaining ring 20 is attached to the retainer 1 using a rivet (particularly a blind rivet) 24 or a screw (not shown).
It is fixed at o.

In some cases, a stud bolt is fixed to the retaining ring 20, and the stud bolt is inserted into a bolt insertion hole of the retainer 10 and protrudes downward in FIG. 9. This bolt is used when attaching the inflator to the retainer.

[Problems to be Solved by the Invention] In the airbag mounting structure of the conventional airbag device described above, the airbag is provided with an opening for inserting a fastener such as a rivet, screw, or bolt, and the retainer is An opening for insertion of the fastener is provided at a position that coincides with this opening.

When assembling an airbag device, it is necessary to align the opening for the fixing device of the airbag with the opening for the fixing device of the retainer, and then insert bolts, screws, rivets, etc. into these openings. It is not easy to match the opening exactly with the opening in the retainer. That is, the edge of the opening for the fixing device of the airbag made of cloth tends to protrude into the opening of the retainer. For this reason, in the conventional airbag mounting structure of the airbag device, the workability of assembling the airbag device was poor.

[Means for Solving the Problems] The airbag mounting structure of the airbag device according to claim (1) of the present invention allows the airbag, which is inflated by gas from the inflator, to be mounted at the periphery of the gas inlet of the airbag. The airbag mounting structure of the airbag device to be fixed is characterized in that a synthetic resin molded part is formed at the peripheral edge of the gas inlet of the airbag.

In the airbag mounting structure of the airbag device according to claim (2) of the present invention, the peripheral part of the inflator receiving port of the airbag is arranged at the peripheral part of the inflator mounting port of the retainer, and the peripheral part of the airbag is attached to the retainer. In the airbag mounting structure for an airbag device to which an airbag is fixed, a synthetic resin sheet is formed on the peripheral edge of the airbag.

In the airbag mounting structure of the airbag device according to claim (3), the peripheral edge of the inflator receiving port of the airbag is arranged at the peripheral edge of the inflator mounting port of the retainer, and the peripheral edge of the inflator receiving port of the airbag is arranged between the retainer ring and the retainer. An airbag mounting structure for an airbag device in which a peripheral edge is sandwiched and a retainer ring is fixed to a retainer with a bolt, characterized in that a synthetic resin sheet is formed on the peripheral edge of the airbag. be.

In the airbag mounting structure for an airbag device according to claim (4), in the airbag mounting structure for an airbag device according to claim (3), a protrusion is provided on the sheet, and the retainer ring and the retainer are small. This is characterized in that the protrusion is engaged with an engaging portion provided on one side.

The airbag mounting structure for the airbag device according to claim (5) is the airbag mounting structure for the airbag device according to any one of claims (2) to 4). Sheets are arranged on both the front and back sides of the peripheral edge, and a through hole is provided at the peripheral edge of the inflator receiving port of the airbag, and the sheets on both the front and back sides are integrated by synthetic resin that has penetrated into the inside of this hole. It is characterized by the presence of

The airbag mounting structure of the airbag device according to claim (6) is the airbag mounting structure of the airbag device according to claim (5), wherein a reinforcing member is inserted into the seat inside the airbag. It is characterized by this.

The airbag mounting structure for an airbag device according to claim (7) is characterized in that, in the airbag mounting structure for an airbag device according to claim [6], the reinforcing member is provided with a bolt. .

The airbag mounting structure for the airbag device according to claim (8) is the airbag mounting structure for the airbag device according to claim (1), wherein a bolt for fixing the airbag is inserted into the synthetic resin molded part. It is characterized by this.

The airbag mounting structure for the airbag device according to claim (9) is the airbag mounting structure for the airbag device according to claim (1), wherein a seam is provided at the peripheral edge of the airbag, and the seam is The eye is characterized by protruding from the fabric surface of the surrounding airbag.

The airbag mounting structure for the airbag device according to claim (10) is the airbag mounting structure for the airbag device according to any one of claims (2) to 7). It is characterized by a reinforcing cloth layered on top.

[Function] In the airbag mounting structure of the airbag device of the present invention, a molded part made of synthetic resin is formed at the periphery of the gas inlet of the airbag, so that the airbag at the periphery of the gas inlet has rigidity. This makes it easier to fix the airbag.

In addition, in the airbag mounting structure of the airbag device of the present invention, since a synthetic resin sheet is formed by resin molding on the periphery of the inflator receiving port of the airbag, the airbag at the periphery of the receiving port has rigidity. now have
The airbag is prevented from protruding into the retainer opening. As a result, the airbag device can be assembled quickly.

Furthermore, in the airbag mounting structure of the airbag device of the present invention, since the periphery of the inflator receiving port of the airbag is reinforced with a synthetic resin sheet, the periphery of the airbag such as bottles, bolts, screws, etc. The peripheral edge of the airbag is firmly fixed by the inserted member. That is, for example, in the airbag mounting structure of the airbag device according to claim (3), when the peripheral edge of the inflator receiving port of the airbag is deployed, the force that tends to pull the seat out from between the retainer ring and the retainer causes the seat to be pulled out. As a result, the peripheral edge of the airbag is reliably prevented from coming off. Of course, the peripheral edge portion is also reinforced.

In the airbag mounting structure of the airbag device according to claim (4), the sheet is provided with a protrusion. This protrusion counteracts the force by which the peripheral edge of the inflator receiving port of the airbag tries to be pulled out from between the retainer ring and the retainer during deployment. Therefore, by providing a large number of these protrusions, it is possible to reliably prevent the peripheral edge of the airbag from coming off when the airbag is deployed.

In the airbag mounting structure of the airbag device according to claim (5), sheets are arranged on both the front and back sides of the peripheral edge of the inflator receiving port of the airbag, and the sheets also intrude into the open part of the airbag. They are integrated through synthetic resin. Therefore, the bond between the seat and the airbag base material is extremely strong.

In the airbag mounting structure of the airbag device according to claim (6), the strength of the sheet is extremely high because a reinforcing material is inserted into the sheet inside the airbag in the structure according to claim (5).

In the airbag mounting structure of the airbag device according to claims (7) and (8), bolts are provided on the seat or the synthetic resin molded part, and the bolts are used to fix the airbag to the retainer. , the inflator can be attached to the retainer.

In the airbag mounting structure of the airbag device according to claim (9), since the seam protrudes from the surface of the fabric of the airbag, the synthetic resin molded part is caught in the seam. Therefore, when an external force is applied at the interface between the airbag and the molded portion in the direction along the interface during the deployment of the airbag, the seam functions to prevent slippage between the two.

In the airbag mounting structure of the airbag device according to claim (10), since the reinforcing cloth is provided, the strength of the inflator receiving opening portion of the airbag is high.

This reinforcing fabric can be combined with the airbag fabric without stitching if the synthetic resin has penetrated into the fabric during sheet formation. Furthermore, when the reinforcing fabric is sewn to the airbag fabric, the effect of claim (9) can be obtained by making the stitches protrude from the surface of the fabric.

[Example] Examples will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view showing an airbag mounting structure of an airbag device according to an embodiment of the present invention, and FIG.
FIG. 2 is a cross-sectional view of a portion taken along line 2-2 in the figure.

In this embodiment, a ring-shaped reinforcing cloth 17 is arranged around the periphery of the inflator receiving port 18 of the airbag 16, that is, the gas inlet. A thin ring-shaped sheet 26 made of synthetic resin is formed on both the front and back sides of this peripheral portion by injection molding. Each ring-shaped sheet 26 is provided with eight protrusions 30. The airbag 16 and the reinforcing cloth 17 have through holes 32 at positions corresponding to the protrusions 30.
33 is provided, and synthetic resin is injection molded inside the through holes 32 and 33, so that a pair of ring-shaped sheets 26 are integrally provided with the airbag 16 in between.

A stud bolt 28 is provided on the holding ring 20. Four stud bolts 28 are provided in this embodiment.

Ring-shaped sheet 26, airbag 16 and retainer 10
Four bolt holes 34B and 34C are bored through which the stud bolts 28 are inserted. The retainer 10 and the holding ring 20 are each provided with eight openings 36 and 38 as engaging portions into which the eight projections 30 engage.

The airbag 16 with the ring-shaped seat 26 is arranged on the retainer 10 so that the inflator receiving port 18 is concentric with the inflator mounting port 12 of the retainer 10, and the retainer ring 20 is superimposed on the retainer 10 from above.

Then, insert the stud bolt 28 into the bolt holes 34B and 34C.
and insert the protrusion 30 into the opening 36.38.

Thereafter, the inflator is attached to the retainer 10 using the stud bolts 28. The inflator is firmly attached to the retainer 10 by sufficiently tightening the nut 28N for fixing the inflator to the stud bolt 28, and the retainer ring 20 and retainer l are also firmly attached to the retainer 10.
The airbag 16 is held between the

When installing the airbag 16, since the peripheral edge of the inflator receiving port 18 of the airbag 16 is made of synthetic resin and has high rigidity, the openings 34B, 34
C can be easily and accurately positioned, and assembly workability is good.

Further, in this airbag mounting structure, the airbag 16
A ring-shaped sheet 26 is injection molded on the periphery of the airbag 16 to reinforce the periphery of the inflator (large mouth 18) and to prevent the force in the removal direction applied to the periphery of the airbag 16 from being applied to the periphery of the periphery. Since it is dispersed throughout, it reliably prevents the airbag from falling out or being damaged.

Furthermore, as is clear from FIG. 1.2, blind rivets are not used in this embodiment, and the number of riveting operations is omitted, improving productivity and reducing the cost of rivet materials.

Of course, since the protrusion 30 is engaged with the engaging portion (opening) 36.38, as described above, even if the airbag 16 attempts to be pulled out from between the retainer ring 20 and the retainer lO when the airbag 16 is deployed, the airbag 16, this protrusion 30 also opposes this force in the direction of removal, and the airbag is reliably prevented from being removed.

3 to 8 are diagrams showing different embodiments of the present invention.

In FIG. 3, a reinforcing member (in this embodiment, an iron ring) is attached to a ring-shaped sheet 26 arranged inside the airbag 16.
50 is inserted, and this ring-shaped sheet 26
Its strength and rigidity are increased.

Further, in this embodiment, the retaining ring 20 is omitted, and the bolts 28 are inserted into the ring-shaped sheet 26 together with the reinforcing member 50, so that the bolts 28 can be inserted into the openings 34C together when the airbag 16 is attached to the retainer 10. I have to. In this way, the number of assembly operations is reduced and the number of parts is also reduced.

In FIG. 4, the head of a bolt 52 is inserted into a ring-shaped seat 26 arranged outside the airbag 16. This bolt 52 has a plate-shaped head 52a as shown in FIG. 5, and has high insert strength. Also in the configuration shown in FIG. 4, the presser ring 20 is not required.

In FIG. 6, the reinforcing cloth 17 is omitted. That is, since the strength of the peripheral edge of the inflator receiving port 18 of the airbag 16 is high, the reinforcing cloth 17 can be omitted as shown in FIG. 6.

In FIG. 7, a reinforcing cloth 17 is used, and the free piece of this reinforcing cloth 17 is sewn to the airbag 16. 54 is a seam.

In FIG. 8, a reinforcing cloth 17 is used, and the reinforcing cloth 17 is sewn to the airbag 16 through a seam 56 on the inner circumferential side of the bolt insertion opening 34B and seams 58 and 60 on the outer circumferential side thereof. ing.

These seams 56-60 are arranged to project from the surface of the fabric, so that this protrusion of the seams 56, 60 cuts into the injection-molded ring-shaped sheet 26. Therefore, when the airbag 16 is deployed, the airbag 16
Even when an external force is applied to the ring-shaped sheet 26 as shown by the arrow S in FIG. On the other hand, it catches and counteracts this shear stress. Thereby, the bonding force between the ring-shaped sheet 26 and the airbag 16 or the reinforcing portion 17 becomes extremely high.

Although the reinforcing cloth 17 is used in FIG. 8, the reinforcing cloth 1
7 may be omitted and only the stitches 56 to 60 may be provided. Further, the number of seams may be one, two, or four or more. This seam may be provided only on the inner peripheral side of the bolt insertion opening 34B.

In FIGS. 3 to 8, the same parts as in FIG. 2 are designated by the same reference numerals. The embodiments shown in FIGS. 3 to 8 can also provide the same effects as the embodiments described above.

In the above embodiments, the retainer ring 20 is fastened to the retainer 10 without using any blind rivets, but a small number of rivets or screws may be used in combination.

In the above embodiment, the openings 36 and 38 are formed as the engaging portions, but in the present invention, a recess formed by deep drawing or the like may be employed as the engaging portions.

In the above embodiments, injection molding was used as the method for molding the synthetic resin, but the molding method is not limited to injection molding, and other molding methods may be used.

[Effects of the Invention] As described above, in the airbag mounting structure of the airbag device of the present invention, the synthetic resin molded part is provided on the airbag, which not only reinforces the airbag but also strengthens the airbag. High mounting strength.

Furthermore, the present invention requires only a very small number of rivets, screws, etc. for attaching the airbag to the retainer.
Not only can productivity be improved, but also the cost of materials such as rivets and screws can be reduced. Furthermore, it is possible to eliminate or simplify the sewing work for the peripheral edge of the gas inlet of the airbag, thereby saving labor and automating the airbag manufacturing process.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the structure of an embodiment of the present invention, FIG. 2 is a cross-sectional view of a portion taken along line 2-2 in FIG. 1, and FIGS.
Each figure is a main part configuration diagram showing a different embodiment. 9th
The figure is a longitudinal sectional view of a conventional airbag device, and Figure 10 is a
FIG. 2 is an enlarged cross-sectional view of the main part of the figure. 10... Retainer, 12... Inflator installation port, 14... Inflator, 16... Air bag, 17
... Reinforcement cloth, 18... Inflator intake port (gas inlet), 20.
... Presser ring, 26 ... Ring-shaped sheet, 30
...Protrusion, 36.38...Opening (engaging part), 56.58.60...Seam. Agent Patent Attorney Tsuyoshi Shigeno Figure 1 Figure 4 Figure 5 Figure 6 Figure 7

Claims (10)

[Claims] (1) In an airbag mounting structure of an airbag device in which an airbag inflated by gas from an inflator is fixed at a peripheral edge of a gas inlet of the airbag, the airbag is attached to a peripheral edge of the gas inlet of the airbag. An airbag mounting structure for an airbag device characterized by forming a resin molded part. (2) In an airbag mounting structure of an airbag device in which a peripheral part of an inflator receiving port of an airbag is arranged at a peripheral part of an inflator mounting port of a retainer, and the peripheral part of the airbag is fixed to the retainer, An airbag mounting structure for an airbag device, characterized in that a synthetic resin sheet is formed on the peripheral edge of the bag. (3) The peripheral edge of the inflator receiving port of the airbag is arranged around the peripheral edge of the inflator mounting port of the retainer, and the peripheral edge of the airbag is sandwiched between the retainer ring and the retainer, and the retainer ring is attached to the retainer by bolts. An airbag mounting structure for an airbag device fixed to an airbag device, characterized in that a synthetic resin sheet is formed on the peripheral edge of the airbag. (4) In the airbag mounting structure of the airbag device according to claim (3), a protrusion is provided on the seat, and
An airbag mounting structure for an airbag device, characterized in that the protrusion is engaged with an engaging portion provided on at least one of the retaining ring and the retainer. (5) In the airbag mounting structure for an airbag device according to any one of claims (2) to (4), sheets are arranged on both the front and back sides of the peripheral edge of the inflator receiving port of the airbag, and Airbag installation of an airbag device characterized in that a throughhole is provided at the periphery of the inflator receiving port of the airbag, and the sheets on both the front and back sides are integrated with a synthetic resin that has penetrated into the inside of the throughhole. structure. (6) The airbag mounting structure for an airbag device according to claim (5), wherein a reinforcing member is inserted into one of the seats on the inside of the airbag. (7) The airbag mounting structure for an airbag device according to claim (6), wherein the reinforcing member is provided with a bolt. (8) An airbag mounting structure for an airbag device according to claim (1), characterized in that a bolt for fixing the airbag is inserted into a synthetic resin molded part. . (9) In the airbag mounting structure for the airbag device according to claim (1), a seam is provided at the peripheral edge of the airbag, and the seam protrudes from the fabric surface of the airbag around the seam. An airbag mounting structure for an airbag device characterized by: (10) The airbag mounting structure for the airbag device according to any one of claims (2) to (7), characterized in that a reinforcing cloth is overlaid on the periphery of the inflator receiving port of the airbag. Airbag mounting structure of airbag device.