JPH061189A - Air bag inflator mounting structure - Google Patents

Abstract

PURPOSE:To omit a holing process in an air bag, simplify coupling and rationalize processes in a structure for coupling an air bag opening with an inflator. CONSTITUTION:An inflator 1 is provided on the peripheral wall surface with a step or groove. An air bag opening cloth 4a covers the inflator 1 from the opening 4 to the step or groove. While a partially notched ring member 5 having a diameter to be fitted to the step or groove is fitted from the outside, leaving a part of distal end cloth, the left distal end cloth is folded back outward to overlap the opening cloth 4a. A ring 7 with a stopper opposed to the ring member 5 is fitted from the outside so that the opening cloth 4a is pinched by the ring member 5 and the ring 7 with the stopper.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for an inflator in an opening of an airbag.

[0002]

2. Description of the Related Art In recent years, the use of airbag devices has been rapidly promoted for the purpose of protecting occupants of vehicles, especially automobiles. Conventionally, in this type of airbag, the gas generated from the inflator has a high temperature (500 ° C. or higher). Therefore, heat resistance is required, and a base cloth (10) obtained by coating a woven cloth using synthetic fibers such as nylon 6, nylon 66, polyester, etc. with synthetic rubber such as silicon, chloroprene, etc. is used for the face contact side (12). And inflator mounting side (11)
And cut into two cloths (11), as shown in FIG.
It is formed by sewing (12) into a bag shape and disposing a pair of regulating members (13). (For example, the actual Kaihei 2-1
Then, in such an airbag, the inflator (14) having a plurality of gas ejection holes (15) is housed in an opening provided in the inflator-attachment-side base cloth (11) to form an inflator-attachment-side base. Opening edge of the cloth (11) is sandwiched between the holding metal fitting (17) attached to the flange (16) on the outer periphery of the inflator and the ring plate (18), and the peripheral edge of the opening of the inflator mounting side base cloth (11) is sandwiched. It is airtightly coupled by inserting and fastening a bolt or a rivet (19) through a hole provided in the holding metal fitting (17) and an engaging hole provided in the ring plate (18).

[0003]

However, when attaching the inflator with the above bolts or the like, it is necessary to form an insertion hole for the bolt or the like at the peripheral edge of the opening portion of the inflator attachment side base cloth, and of course a drilling step is required. . Moreover, this drilling process is not limited to drilling, it is necessary to attach a patch or sew to reinforce the periphery of the hole, and tightening with bolts requires much time and labor. It was

The present invention copes with the above situation, and the air bag opening is connected to the inflator without forming a bolt insertion hole for connecting the air bag base cloth to the inflator in particular. The purpose of this process is to omit the step of making holes and to simplify the process of attaching the inflator and to streamline the process.

[0005]

That is, the feature of the mounting structure of the present invention that meets the above object is that a step portion or a groove is provided on the peripheral wall surface of the inflator, and an airbag opening cloth is provided in the inflator from the opening portion to the step. Part or groove so as to cover the part or groove, and leave a part of the tip cloth from the outside thereof, and fit a partially cut-out ring member having a diameter that fits in the step or groove, and leave the left tip cloth outward. Fold back and polymerize on the opening cloth,
The point is that a ring with a stopper is fitted to face the ring member from the outside and the opening cloth is sandwiched between the ring member and the ring with a stopper.

[0006]

When the inflator is attached and coupled to the airbag by the above-described mounting structure of the present invention, only the ring members are fitted and sandwiched by the ring members. Therefore, it is necessary to provide the airbag base fabric with a separate insertion hole such as a bolt. Instead, the time-consuming drilling process is unnecessary. Moreover, the conventional holding metal fittings, bolts, and rivets are not required, which rationalizes the process and enhances the economical efficiency. In particular, since the opening cloth of the air bag is folded and polymerized, it retains its strength without any special reinforcement.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a structure of an inflator mounting part according to the present invention. In the figure, (1) is an inflator, (2) is a base fabric for an inflator mounting side of an airbag, and the inflator (1) has a large diameter part whose outer shape is an upper part ( 1
It is formed in a shape having a step portion consisting of a) and a lower small diameter portion (1b), and a plurality of gas ejection holes (3) are provided on the peripheral wall of the upper large diameter portion (1a).

In the case of FIG. 1, the inflator (1) has a stepped portion as described above, but it is needless to say that a recessed groove may be provided instead of the stepped portion without the stepped portion shape. It is the same. On the other hand, an opening portion (4) is provided at a substantially central portion of the base fabric (2) on the inflator mounting side of the airbag so that the inflator (1) can be fitted when mounting the inflator.

Thus, when the inflator is attached to the airbag, the cloth (4a) of the opening (4) of the inflator-mounting side base cloth (2) is covered on the inflator (1), and the stepped small diameter portion of the inflator (1) is covered. As shown in FIG. 2 (a), which has a diameter obtained by adding the cloth thickness to the diameter of the small diameter portion so as to match the small diameter portion (1b) of the stepped portion from the outer side thereof until the (1b) is covered. Notch (6)
The ring member (5) having the above is fitted with the cloth (4a) for the opening part left, and the cloth for the opening part left afterwards is fitted on the ring part (5).
It folds outward and polymerizes. Then, as shown in FIG.
An opening formed by folding back the ring member (5) and the fastener as shown in (c), that is, either the tightening screw (8) or the ring (7), (7 ') to which the fastener (8') is attached. The cloth (4a) is fitted into the ring member (5) from the outside, and the cloth (4a) at the opening is sandwiched between the ring member (5) and the ring (7) or (7 ') with a stopper. Attach and bond airtightly. In the above coupling structure, the ring member (5) having a partial cutout (6) preferably has a circular cross-section, and the ring with a stopper (7),
It is preferable that the cross section of (7 ′) has a concave arc surface corresponding to the ring member (5). in this case,
The radius of the arc is preferably larger than the radius of the circular cross section of the ring member (5). Of course, the rings of the stopper rings (7) and (7 ') may have a circular cross section, but in that case, the ring members (5) are not fitted to the ring members (5). Fit it on the upper side of the so that it is clamped between the top and bottom and tightened.

Although the mounting structure of the present invention has been described above, the present invention is not limited to the above structure, and the opening cloth of the airbag is wound around the ring members inside and outside. It goes without saying that appropriate changes can be made without departing from the object of the present invention in which the objects are sandwiched and joined without using bolts or rivets as in the conventional case.

[0011]

As described above, according to the present invention, the inflator and the air bag are connected to each other by providing the inflator with the step or groove, and sandwiching the air bag opening with the step or the groove and the ring member. Since it is not necessary to use bolts or rivets like the above, it is not necessary to make holes for tightening bolts, etc. in the opening of the airbag, and therefore, it is possible to omit the step of drilling the airbag base cloth, which took a lot of time and labor. This makes it possible to streamline the process, and also makes it easier to attach the inflator to the airbag without having to additionally attach or sew patches that were attached for reinforcement when tightening the bolts. You can have a special effect.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts showing an example of a structure for attaching an inflator according to the present invention to an airbag opening.

FIG. 2 is a ring member used in the mounting structure of the present invention, (a)
Shows a partially notched ring member, and (b) and (c) show a ring with a stopper.

FIG. 3 is a sectional view showing an example of a conventional inflator mounting structure.

[Explanation of symbols]

 (1) Inflator (2) Airbag inflator mounting side base cloth (3) Gas ejection hole (4) Opening (4a) Opening cloth (5) Ring member (6) Notch (7) Ring with stopper (7 ') Ring with stopper (8) Stopper (8') Stopper

Claims (1)

[Claims] 1. When attaching an inflator to an airbag opening, a step or a groove is provided on a peripheral wall surface of the inflator, and an airbag opening cloth is covered on the inflator so as to cover the step or the groove from the opening. While leaving a part of the tip cloth from the outside, a partially cutout ring member having a diameter that fits into the stepped portion or groove is fitted, and the left tip cloth is folded back outward to be superposed on the opening cloth. An inflator mounting structure for an airbag, characterized in that a ring with a stopper is fitted so as to face the ring member from the outside and the opening cloth is sandwiched between the ring member and the ring with a stopper.