JPH04353048A - Air bag mounting method of air bag device for assistant's seat - Google Patents

Abstract

PURPOSE:To provide a method for mounting an air bag facilitating the mounting work of the air bag in an air bag device for assistant's seat. CONSTITUTION:A method for mounting the terminal part 31 of an air bag 30 to the circumferential wall 11 of a case 10 having an inflator fixed to the lower part by utilizing a retainer 20 is provided. The retainer 20 has a fixing part 21 fixed to the circumferential part 11 of the case 10 and a curved part 23 curved at one end of the fixing part 21. In mounting, a thick part 32 is first formed by surrounding a bar material 5 on the terminal part 31 of the air bag 30. The thick part 32 is disposed on the curved part 23 of the retainer 20, and the curved part 23 is curved, and fixed to nip the thick part 32. The fixing part 21 is fixed onto the circumferential surface 11 of the case 10.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for attaching an airbag to a passenger airbag device disposed on the passenger side of an automobile, which allows the airbag to be easily attached.

0002

[Prior Art and Problems] Conventionally, in this type of air bag device for a passenger seat, the air bag was attached to the case using a retainer to which bolts or nuts were fixed, similar to the air bag placed in the steering wheel. (See US Pat. No. 4,846,368).

[0003] Then, to explain how to attach the air bag to the case using a retainer, first, when using a retainer to which multiple bolts are fixed,
Insert each bolt into the mounting hole formed at the end of the airbag, then insert the bolt into the case from the inner circumference side, screw the nut onto each bolt protruding from the outer circumference side of the case, and attach the retainer to the case. Make sure to fasten the nut to
The airbag was attached to the case so as to be sandwiched between the retainer and the case.

[0004] Furthermore, when using a retainer with a plurality of nuts fixed to it, the mounting holes of the air bag and each nut of the retainer are made to correspond to the mounting holes formed in the case, and the nuts are attached to the inner circumferential side of the case. Place the air bag in the case, insert it into each mounting hole from the outer circumference of the case, screw the bolt into the nut of the retainer, bolt the retainer to the case, and attach the air bag to the case so that it is sandwiched between the retainer and the case. was.

However, in the conventional mounting method using a retainer, the bolts and nuts of the retainer must be positioned in the mounting holes formed at the end of the air bag, and since the air bag is flexible, the positioning is difficult. It was difficult to install the air bag, and the air bag could not be installed easily. In particular, the airbag on the passenger side has a larger shape when inflated than the airbag placed on the steering wheel on the driver's side, so it is heavier and takes more time to locate the airbag's mounting holes. becomes.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method for attaching an air bag in an air bag device for a passenger seat, which facilitates the air bag attaching operation.

[0007]

[Means for Solving the Problems] An air bag mounting method according to the present invention is an air bag mounting method for an air bag device for a passenger seat, in which the terminal portion of the air bag is mounted on the peripheral wall of a case with an inflator fixed to the lower part thereof using a retainer. In the method, the retainer includes a fixed part fixed to the peripheral wall of the case and a bent part bent at one end of the fixed part, and a rod is wrapped around the end part of the air bag. A thick part is formed, the thick part is arranged on the bent part of the retainer, the bent part is bent and the thick part is fixed to the retainer so as to sandwich the thick part, and the fixed part is attached to the case. It is characterized by being fixed to the surrounding wall.

[0008]

[Operations and Effects of the Invention] In the airbag attachment method according to the present invention, a thick part is formed by wrapping a rod around the end of the airbag in advance, and then the bent part is bent to form the thick part into a fixed part. The air bag is fixed to a retainer so as to be sandwiched between the air bag and the bent portion, and the fixed portion of the fixed retainer is fixed to the peripheral wall of the case, and the terminal portion of the air bag is attached to the peripheral wall of the case.

Therefore, instead of aligning the mounting holes of the flexible air bag with the mounting holes of the case as in the conventional case, it is possible to mount the retainer by aligning the mounting holes of the rigid retainer and the peripheral wall of the case. Since the work can be carried out, the air bag installation work can be carried out easily.

Furthermore, in the air bag mounting method according to the present invention, there is no need to interpose the end portion of the air bag between the retainer and the peripheral wall of the case, and the rigid bodies are fixed to each other, so that it is not necessary to interpose the conventional air bag. The fastening force of the fixing means can be improved compared to the case where the retainer is fixed to the case.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

[0012] The air bag device M for the passenger seat to which the air bag 30 is attached in the embodiment is arranged above a grab box (not shown) in the instrument panel P on the passenger seat side of the automobile, as shown in FIG. It is something.

As shown in FIGS. 4 to 6, this air bag device M includes an inflator 1, a case 10, four retainers 20, and an air bag 30.

The case 1 has a bottomed rectangular cylinder shape made of sheet metal, and has four side walls 11A, 11B, 11C, and
11D is the peripheral wall 11, and the outer shape of the bottom part is semi-cylindrical. Attachment holes 12 and 13 for fixing the inflator 1 are formed in the lower portions of the side walls 11A and 11B, respectively. Furthermore, a plurality of attachment holes 14 for fixing the retainer 20 are formed in the upper part of each side wall 11.

Note that the mounting hole 12 has a larger diameter than the mounting hole 13. To explain how to fix the inflator 1 using these mounting holes 12 and 13, the bolt part 3 side of the inflator 1 is inserted into the case 10 from the mounting hole 12 side, and the flange part 2 of the inflator 1 is inserted into the case 10 from the mounting hole 12 side. The inflator 1 is fixed to the case 10 by making the bolt part 3 project from the mounting hole 13 and screwing the nut 4 into the bolt part 13.

Although omitted in FIGS. 4 and 5, case 1
A bracket 15 for bolting the air bag device M to the vehicle body B is fixed to the lower outer peripheral surface of the vehicle body B (see FIG. 6).

Each retainer 20 is made of sheet metal, has a length corresponding to the length of each side wall 11, and is composed of a total of four retainers 20A, 20B, 20C, and 20D of two types of shapes. Each retainer 20 includes a fixing portion 21 that is fixed to each side wall 11, and a bent portion 23 that forms a U-shaped groove 24 with the fixing portion 21 in a state before the air bag 30 is fixed (see FIG.・See 2).

The opening width b of this U-shaped groove 24 is made approximately equal to the thickness dimension of a thick portion 32 of an air bag 30, which will be described later.

Furthermore, the fixed portion 21 of each retainer 20 includes:
A mounting hole 22 is formed at a position corresponding to the mounting hole 14 of the case 10 into which a rivet 6 as a fixing means is inserted.

[0020] The air bag 30 has flexibility and
Inflator 1
It is formed so that it expands into a substantially spherical shape by the gas supplied from. Further, the air bag 30 has a substantially rectangular cylindrical shape in which the opening side end portions 31 (31A, 31B, 31C, and 31D) are separated from each other. Each terminal part 31A/31
The lengths of B, 31C, and 31D are 20A and 20 for each retainer.
The length is approximately equal to that of B, 20C, and 20D.

[0021] Straight bars 5 (5A, 5B, 5C, 5D) made of metal or the like are disposed on these end portions 31 in order to form a thick wall portion 32 in each end portion 31. becomes. The length of each bar 5A, 5B, 5C, and 5D is approximately equal to the length of each retainer 20A, 20B, 20C, and 20D.

Next, this air bag 30 is attached to the case 10.
This section explains the work to install it.

First, as shown in FIG.
The opening of the U-shaped groove 24 of the corresponding retainer 20 is arranged in the terminal part 31 of the retainer 20, and the terminal part 3
A corresponding bar 5 is placed with the bar 1 interposed therebetween.

Then, as shown by the two-dot chain line in FIG. 2, using the pushing jig 7, insert the bar 5 together with the end portion 31 into the U-shaped groove 24 so that the end portion 31 wraps the bar 5. Let me,
While forming a thick wall portion 32 on the end portion 31 of the air bag 30, the thick wall portion 32 is pushed in and disposed on the bottom wall of the U-shaped groove 24.

Thereafter, as shown in FIG. 3, the bent portion 23 is bent by press working, and the thick portion 32 is fixed to the retainer 20 so as to be sandwiched between the fixed portion 21 and the bent portion 23.

[0026] The above work is carried out at each end portion 31 of the air bag 30.
This will be done for A, 31B, 31C, and 31D.

Then, by aligning the mounting holes 14 and 22 with each other and fixing the fixed portion 21 of each retainer 20 and each side wall 11 of the case 10 with rivets 6, the air bag 30 is attached to the case 10 as shown in FIG. It can be attached to the peripheral wall 11 of.

In this embodiment, the air bag 3 is
0 can be attached to the peripheral wall 11 of the case 10, and the rigid retainer 20 and the peripheral wall of the case 10 can be attached to the peripheral wall 11 of the case 10 without having to align the mounting holes of the flexible air bag with the mounting holes of the case as in the conventional case. Since the mounting holes 22 and 14 of the air bag 11 can be aligned with each other, the air bag 30 can be easily mounted.

Furthermore, in this embodiment, there is no need to interpose the end portion 31 of the air bag 30 between the retainer 20 and the peripheral wall 11 of the case 10, and the rigid bodies are fixed to each other, so that it is not necessary to interpose the conventional air bag. Compared to the case where the retainer is fixed to the case by
The fastening force can be improved.

Furthermore, in the embodiment, the U-shaped groove 2 is formed in advance in the retainer 20 which is separated from the case 10.
4, insert the terminal part 31 of the air bag 30 into the bent part 2.
3 is bent to connect the air bag 30 and the retainer 20. That is, if the U-shaped groove is directly provided in the case 10 and the bent portion is bent to connect the terminal portion 31 of the air bag 30, it will be difficult to perform these operations on the bottom wall of the case 10 or the like. On the other hand, in the embodiment, since the connection work is first performed on the retainer 20 which is separate from the case 10, there is no problem in the arrangement of the terminal portion 31 of the air bag 30 or the bending work of the bending portion 23.

The air bag 30 may be folded after being attached to the case 10, or may be attached to the case 10 in a pre-folded state.

After the air bag 30 is attached to the case 10 and folded, the air bag device M is attached to the vehicle body B using the bracket 15 and used.

In the embodiment, four retainers 20 are used, but the side walls 11A and 1 of the case 10
1B, 11C, and 11D in which two or three retainers 20 are integrated in advance, or as shown in FIG. Using one retainer 200 of
An air bag 30 may also be attached.

[0034] This retainer 200 has a mounting hole 2
2, and four bent parts 23 that form a U-shaped groove 24 with each of the fixed parts 21 before the air bag 30 is attached.
The cross-sectional shapes of these fixed portions 21, bent portions 23, U-shaped grooves 24, etc. are the same as shown in FIGS. 1 to 3).

Note that when using the retainer 200, each bent portion 23 and each terminal portion 31 of the air bag 30 are
In order to avoid interference with the adjacent bent portion 23 and terminal portion 31,
Countermeasures have been taken, such as cutting out both side edges.

When using this retainer 200, the bar 5 may be formed into a square ring shape along the peripheral wall 11 of the case 10, or the square ring shape may be divided into two parts such as an L-shape. You may also use a bar that has been prepared.

Further, in the embodiment, the shape of the bent portion 23 of the retainer 20 was shown to form a U-shaped groove 24 with the fixed portion 22 before the air bag 30 was attached. If it is easy to arrange the thick part 32 of the air bag 30, the shape of the bent part 2 is such that it forms an L-shape with the fixed part 22, as shown by the two-dot chain line in FIG.
Even 30 is fine.

Furthermore, in the embodiment, rivets 6 are used as means for fixing the retainer 20 and the side wall 11 of the case 10.
Although a case is shown in which a bolt or a nut is used, a bolt or a nut may also be used, and in that case, the bolt or the like may be fixed to the retainer 20 or the side wall 11 in advance.

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional view showing an attached state of an air bag according to an embodiment of the present invention.

FIG. 2 is a partial sectional view at the beginning of the work of installing the air bag of the same embodiment.

FIG. 3 is a partial cross-sectional view of the same embodiment during the installation work of the airbag.

FIG. 4 is an exploded perspective view of the air bag device assembled in the same embodiment.

FIG. 5 is a perspective view of the air bag device assembled in the same embodiment.

FIG. 6 is a diagram showing the air bag device assembled in the same embodiment installed in an automobile.

FIG. 7 is a perspective view of an air bag device assembled in another embodiment.

[Explanation of symbols] 1...Inflator, 5... Bar material, 6... (fixing means) rivets, 10...Case, 11... (peripheral wall) side wall, 14...Mounting hole, 20・200...retainer, 21...Fixed part, 22...Mounting hole, 23・230...Bending part, 30...Airbag, 31...terminal section, 32...thick part, M...Air bag device for passenger seat.

Claims (1)

[Claims] 1. An air bag mounting method for an air bag device for a passenger seat, in which an end portion of an air bag is attached to a peripheral wall of a case with an inflator fixed to a lower part thereof, using a retainer, the retainer being attached to a peripheral wall of the case. a fixed portion fixed to the retainer; and a bent portion bent at one end of the fixed portion; for a passenger seat, wherein the bent part is bent and fixed to the retainer so as to sandwich the thick part, and the fixed part is fixed to the peripheral wall of the case. How to install an air bag in an air bag device.