JPH04353047A - Air bag device for assistant's seat - Google Patents

Abstract

PURPOSE:To provide an air bag device for assistant's seat facilitating the mounting work of an air bag. CONSTITUTION:An inflator is fixed to the lower part of a case 10, and the terminal part 31 of an air bag 30 is mounted on the circumferential wall 11 of the case 10 by utilizing a retainer 20. The retainer 20 has a fixing part 22, a bottom wall part 24, and a side wall part 25. In the terminal part 31 of the air bag 30, a thick part 32 enclosing a bar material 5 is inserted up to the bottom wall part 24 of a U-shaped groove 21, and the body side cloth part 33 and turn-up side cloth part 34 of the air bag 30 are disposed separately from the U-shaped groove 21. The end part of the circumferential wall 11 is inserted in the U-shaped groove 21 to press the thick part 32, and the fixing part 22 of the retainer 20 is fixed onto the circumferential wall 11 of the case 10 by a rivet 6. The opening width (b) of the U-shaped groove 21 is nearly equal to the thickness dimension obtained by adding the body side cloth part 33, the turn-up side cloth part 34, and the circumferential wall 11 of the case 10.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to a passenger airbag device disposed on the passenger side of an automobile.
This invention relates to an air bag device for a passenger seat that allows easy installation of the air bag.

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] To explain the case of attaching an airbag to a case using a conventional retainer, first, when using a retainer with a plurality of bolts fixed, each bolt should be inserted into a mounting hole formed at the end of the airbag. In this state, insert the bolts into the case from the inner circumference side, screw the nuts onto each bolt protruding from the outer circumference side of the case, fix the retainer to the case with the nuts, and then attach the air bag to the retainer and the case. It was attached to the case so that it was sandwiched between the two.

[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, when using a conventional 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. Difficult to do,
It was not easy to install the air bag. especially,
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. Become.

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

[0007]

[Means for Solving the Problems] An airbag device for a passenger seat according to the present invention is provided with a retainer for attaching an end portion of an airbag to a peripheral wall of a case in which an inflator is fixed to the lower part of the case. An air bag device for use in airbags, wherein the retainer includes a fixing portion fixed to the peripheral wall, and a U-shaped groove formed by the fixing portion.
The air bag has a bottom wall portion and a side wall portion, and at the end portion of the air bag, a thick wall portion enclosing a rod is inserted up to the bottom wall portion of the U-shaped groove, and a portion of the air bag extending from the thick wall portion is inserted into the U-shaped groove. The main body side cloth portion and the folded side cloth portion are separated from the U-shaped groove, and the end of the peripheral wall of the case presses the thick portion of the airbag inserted up to the bottom wall of the U-shaped groove. The fixing portion of the retainer is inserted into the U-shaped groove while contacting the fixing portion, and the fixing portion of the retainer is inserted into the U-shaped groove while contacting the fixing portion.
is fixed to the peripheral wall of the case, and the opening width of the U-shaped groove is
The air bag device for a passenger seat is characterized in that the total thickness of the main body side fabric portion, the folded side fabric portion, and the peripheral wall of the case is substantially equal to each other.

[0008]

Effects and Effects of the Invention In the airbag device for a passenger seat according to the present invention, the terminal portion of the airbag is disposed in the opening of the U-shaped groove of the retainer, and the bar is disposed with the terminal portion interposed. Insert the bar together with the end into the U-shaped groove so as to wrap it around the end, and while forming a thick part at the end of the air bag, push the thick part into the bottom wall of the U-shaped groove.

At the same time, the main body side cloth part and the folded side cloth part of the air bag extending from the thick part are separated from the U-shaped groove, and the end of the peripheral wall of the case is brought into contact with the fixed part of the retainer. The thick part of the air bag is pressed into the U-shaped groove, and the fixed part of the retainer is fixed to the peripheral wall of the case using fixing means such as rivets.

[0010] Then, the opening width of the U-shaped groove is approximately equal to the thickness of the main body side cloth portion of the airbag, the folded side cloth portion, and the peripheral wall of the case, and the end face of the peripheral wall of the case However, since the thick portion of the air bag is pressed without coming off or shifting from the U-shaped groove, the air bag can be reliably attached to the peripheral wall of the case.

Therefore, in the air bag device for a passenger seat according to the present invention, a thick part is formed at the end of the air bag using a rod, and the thick part is connected to the U-shape of the retainer by the end of the case. The air bag can be attached to the case by fixing the retainer to the peripheral wall of the case while preventing it from coming off in the groove.

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

Furthermore, in the airbag device for a passenger seat according to the present invention, when the retainer and the peripheral wall of the case are fixed together, it is not necessary to intervene the end portion of the airbag, and the rigid bodies are fixed to each other, which is different from the conventional method. The fastening force of the fixing means can be improved compared to the case where the retainer is fixed to the case by interposing an air bag.

[0014]

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

As shown in FIG. 6, the passenger seat air bag device M of the embodiment is arranged above a grab box (not shown) in an instrument panel P on the passenger seat side of an automobile.

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 tube 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 3.

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 has a total of four retainers 20A, 20B, 20C, and 20D in two types of shapes.
It consists of Each retainer 20 includes a fixing part 22 fixed to each side wall 11 of the case 10, and a bottom wall part 24 and a side wall part 25 for forming a U-shaped groove 21 with the fixing part 22. The side wall portion 25 has its tip connected to the fixed portion 22.
It is configured so as not to cover a mounting hole 23, which will be described later.

The opening width b of this U-shaped groove 21 is determined by the thickness dimension of the main body side fabric portion 33 of the airbag 30, the folded side fabric portion 34, and each side wall 11 of the case 10, which will be described later.
They are approximately equal.

[0022] Furthermore, the fixed portion 22 of each retainer 20 includes:
A mounting hole 23 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.

[0023] The air bag 30 has flexibility and
The inflator 1 is made of a cloth material that does not permeate the gas supplied from the inflator 1, and has an open bottom side.
It is formed so that it expands into a substantially spherical shape by the gas supplied from. Further, the air bag 30 has terminal portions 31 (31A, 31B, 31C, and 31D) on the opening side that are separated from each other and have a generally rectangular cylindrical shape. Each terminal section 31A/3
The lengths of 1B, 31C, and 31D are for each retainer 20A and 2.
The length is approximately equal to that of 0B, 20C, and 20D.

[0024] Straight bars 5 (5A, 5B, 5C, 5D) made of metal or the like are disposed in these terminal parts 31 in order to form a thick wall part 32 in each terminal part 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 21 of the retainer 20 is arranged at the terminal part 31 of the retainer 20, and the corresponding bar 5 is arranged at the opening part with the terminal part 31 interposed therebetween.

Then, insert the bar 5 together with the end portion 31 into the U-shaped groove 21 so that the end portion 31 wraps the bar 5, and
A thick wall portion 32 is formed on the end portion 31 of the air bag 30, and the thick wall portion 32 is pushed into the bottom wall portion 24 of the U-shaped groove 21.

At the same time, as shown in FIG.
While bringing the corresponding side wall 11 into contact with the fixed portion 22 of the retainer 20 in such a manner that the main body side cloth portion 33 and the folded side cloth portion 34 of the air bag 30 extending from the thick portion 32 are separated from the U-shaped groove 21. , the air bag 30 is inserted into the U-shaped groove 21 so as to press the thick part 32 of the air bag 30.

Then, as shown in FIG. 1, the fixing portions 22 of each retainer 20 are aligned so that the mounting holes 14 and 23 are aligned with each other.
and fix the side wall 11 of the case 10 with rivets 6.

[0030] 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.

[0031] Then, the opening width b of each U-shaped groove 21 is made approximately equal to the thickness dimension including the main body side cloth part 33 of the airbag 30, the folded side cloth part 34, and the side wall 11 of the case 10. , since the end surfaces of each side wall 11 of the case 10 press the thick portion 32 of the air bag 30 without coming off or shifting from the U-shaped groove 21, the air bag 3
0 will be securely attached to the side wall 11 of the case 10.

Therefore, in the airbag device M for a passenger seat according to the embodiment, a thick wall portion 32 is formed at each end portion 31 of the air bag 30 using the rod 5, and the thick wall portion 32 is connected to the case 10. The air bag 30 can be attached to the case 10 by fixing the retainer 20 to each side wall 11 of the case 10 while preventing the retainer 20 from coming off within the U-shaped groove 21 of each side wall 11 at the end of each side wall 11. It is.

Therefore, the rigid retainer 20 and the side wall 1 of the case 10 do not have to match the mounting holes of the flexible air bag with the mounting holes of the case as in the conventional case.
Since the mounting holes 14 and 23 of the air bag 30 can be aligned with the mounting holes 14 and 23 of the air bag 30, the mounting work of the air bag 30 can be easily carried out.

Furthermore, in the passenger seat air bag device M of this embodiment, when each retainer 20 is fixed to each side wall 11 of the case 10, the end portion 31 of the air bag 30 does not need to be interposed, and the rigid bodies are connected to each other. Since it is in a fixed state, the fastening force of the rivet 6, which is the fixing means, can be improved compared to the conventional case where the retainer is fixed to the case with an intervening air bag.

The airbag 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 FIGS. The air bag 30 may be attached using a single cylindrical retainer 200.

This retainer 200 is provided with a notch 201 around its periphery and is bent to form a fixed portion 22.
A bottom wall portion 24 and a side wall portion 25, which together constitute the U-shaped groove 21, are formed.

Further, in the embodiment, a case is shown in which four rods 5 are used, but the rods 5 may be formed in a square ring shape along the peripheral wall 11 of the case 10, or the rods 5 may be formed in a square ring shape along the peripheral wall 11 of the case 10. It is also possible to use a bar that is divided into two parts, such as an L-shape.

Further, in the embodiment, the case is shown in which the rivet 6 is used as a means for fixing the retainer 20 and the side wall 11 of the case 10, but bolts or nuts may also be used. , retainer 20 and side wall 1
A bolt or the like may be fixed to 1 in advance.

[Brief explanation of drawings]

FIG. 1 is a partial 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 air bag.

FIG. 4 is an exploded perspective view of the same embodiment.

FIG. 5 is a perspective view of the same embodiment.

FIG. 6 is a diagram showing the same embodiment installed in a car.

FIG. 7 is a perspective view showing another embodiment.

FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 7;

[Explanation of symbols]

1...Inflator, 5... Bar material, 6... (fixing means) rivets, 11... (peripheral wall) side wall, 14...Mounting hole, 20・200...retainer, 21...U-shaped groove, 22...Fixed part, 23...Mounting hole, 24...Bottom wall part, 25...side wall part, 30...Airbag, 31...terminal section, 32...thick part, 33...Main body side cloth part, 34...Folded side cloth part, b...Aperture width, M...Air bag device for passenger seat.

Claims (1)

[Claims] 1. An airbag device for a passenger seat, wherein a retainer for attaching an end portion of the airbag to a peripheral wall of a case with an inflator fixed to the lower part is fixed by fixing means, the retainer being fixed to the circumferential wall. and a bottom wall part and a side wall part for forming a U-shaped groove with the fixed part, and at the end part of the air bag, the thick part surrounding the bar material forms a U-shaped groove. The air bag is inserted up to the bottom wall of the groove, and the main body side fabric part and folded side fabric part extending from the thick wall part are removed from the U-shaped groove, and the end of the peripheral wall of the case is inserted into the U-shaped groove. The fixing section of the retainer is inserted into the U-shaped groove while contacting the fixing section so as to press the thick part of the air bag that has been inserted up to the bottom wall of the groove, and the fixing section of the retainer is pressed by the fixing means. The U-shaped groove is fixed to the peripheral wall of the case, and the opening width of the U-shaped groove is approximately equal to the thickness dimension including the main body side cloth portion of the air bag, the folded side cloth portion, and the peripheral wall of the case. An airbag device for the passenger seat featuring: