JPH10203290A - Side air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate assembling of an air bag and an inflator by securing sealing capability and to easily attach the inflator to a body. SOLUTION: A side air bag device M1 comprises an air bag 11 folded in the door opening peripheral edge of a car inside and formed to be a bag made of cloth and developed to cover the door opening during expansion and a roughly cylindrical inflator 18 for supplying expansion gas to the air bag 11. A pressing surface part 22a of an attaching bracket 19 is disposed around the gas flow-in part 14 of the air bag 11 exterior packaged to the inflator 18 and reduced in diameter, the gas flow-in part 14 is pressure contacted to the outer peripheral surface of the inflator 18 and, by attaching the attaching part 21 of the attaching bracket 19 to a body 28, the gas flow-in part 14 and the inflator 18 are attached to the body 28.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side airbag device which is attached to the periphery of a door opening inside a vehicle body and covers the door opening when inflated and restrains the occupant's head.

[0002]

2. Description of the Related Art Conventionally, in this type of side airbag device M0, as shown in FIG. 1, an airbag 1 which is folded and attached to the periphery of a door opening W inside a vehicle body, And an inflator 7 for supplying an inflation gas for inflating the airbag 1.

[0003] The airbag 1 is formed of a flexible cloth material, and is arranged on a plurality of cushion portions 2 which are inflated when inflated. And a pipe insertion part 5 for inserting a pipe 6 for supplying an inflation gas from an inflator 7.

The cushion portion 2 is defined by a sewn portion 3 in which the inner side wall portion and the outer side wall portion of the bag-shaped airbag 1 are sewn in a substantially vertical direction from the upper edge side to the lower edge side.

When the side airbag device M0 is operated, the inflation gas from the inflator 7 passes through the pipe 6, passes through a through hole (not shown) of the pipe 6, and the airbag 1 inflates.
, Each cushion portion 2 of the airbag 1 is inflated.

[0006] When each cushion portion 2 is inflated, tension is generated in a line LL extending from the lower side of the periphery of the door opening W of the airbag 1 to the upper side diagonally upward, and this tension line L- With L, the occupant's head can be reliably restrained even if the occupant's head comes into contact with the airbag 1.

The airbag 1 is attached to a substantially L-shaped portion which is a peripheral edge of the door opening W. If no tension is exerted on the tension line LL at the time of inflation, the head of the occupant may interfere. However, the movement of the airbag 1 alone makes it impossible to properly restrain the occupant's head.

However, the conventional side airbag device M0
Then, the inflation gas from the inflator 7 is supplied to the airbag 1 using the pipe 6 inserted into the long pipe insertion portion 5 of the airbag 1, and the pipe 6 becomes long, and the airbag device The weight of M0 was increasing.

In this case, the airbag 1 and the inflator 7 can be easily assembled by providing a part for covering the inflator 7 in the airbag 1 itself and connecting the part to the inflator 7.

However, since the high-pressure inflation gas is discharged from the inflator 7, the sealing property of the airbag 1 is ensured, and the airbag 1 and the inflator 7 are inflated.
A problem arises in connecting.

The present invention has been made to solve the above-mentioned problem, and a side air which can easily assemble an airbag and an inflator while ensuring a sealing property and can easily attach an inflator to a body. It is an object to provide a bag device.

[0012]

According to the present invention, there is provided a side airbag device which is folded into the periphery of a door opening on the inside of a vehicle, and which is in the form of a cloth bag which is deployed so as to cover the door opening when inflated. A substantially cylindrical inflator for supplying an inflation gas to the airbag,
A substantially cylindrical gas inflow portion is formed in the airbag,
A side airbag device in which the gas inflow portion is connected to the exterior of the inflator, the mounting including a substantially cylindrical pressing surface portion capable of being reduced in diameter and a mounting portion capable of being mounted on a vehicle body. A bracket is used, the pressing surface portion of the mounting bracket is arranged around the gas inflow portion provided on the inflator to reduce the diameter, and the gas inflow portion is pressed against the outer peripheral surface of the inflator, and The gas inflow section and the inflator are attached to the body by attaching an attachment section to the body.

[0013]

In the side airbag device according to the present invention, a mounting bracket having a substantially cylindrical pressing surface portion that can be reduced in diameter and a mounting portion that can be mounted on a vehicle body is used. Is arranged around the substantially cylindrical gas inflow portion provided on the inflator to reduce the diameter. The gas inflow portion is pressed against the outer peripheral surface of the inflator, and the mounting portion is attached to the body. The part and the inflator will be attached to the body.

Since the pressing surface portion of the mounting bracket has a substantially cylindrical shape and is reduced in diameter, the gas inflow portion of the airbag provided in the substantially cylindrical inflator is pressed against the outer peripheral surface of the inflator with good sealing properties. It will be.

Therefore, in the side airbag device of the present invention, the airbag and the inflator can be easily assembled while securing the sealing performance. Further, since the mounting bracket itself has a mounting portion that can be mounted on the body, if the mounting portion is mounted on the body, the inflator assembled with the gas inflow portion can be easily mounted on the body.

[0016]

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

The side airbag device M1 of the embodiment is
As shown in FIGS. 2 to 5, the airbag 11 and the inflator 1 are arranged from below the front pillar around the periphery of the door opening W to the rear side of the roof side rail.
8 is provided.

The airbag 11 is folded from the front pillar above the belt line BL on the periphery of the door opening W on the inside of the vehicle (the line on the lower edge side of the window frame F in the door D) to the roof side rail and stored. ing.

As shown in FIG. 6, the airbag 11 has an inner side wall portion 12 and an outer side wall portion 13 and has a substantially square plate-like bag shape when inflated, and has an inflatable The apparatus is provided with a substantially cylindrical gas inflow section 14 through which gas flows.

The airbag 11 of the embodiment is formed of a substantially arrow-blade-shaped cloth material having a lower edge side between the vehicle inner side wall portion 12 and the vehicle outer side wall portion 13 as a substantially center line. While being folded in two, a predetermined peripheral edge is sewn with a suture thread 10 such as a polyester thread to form a bag shape, and the upper edge side of the peripheral sewn portion is a vehicle inner side wall portion 12 and a vehicle outer side wall portion 13.
And an attachment portion 15 for attachment to the body 28 having an attachment hole 15a. The cloth material of the airbag 11 is formed of a flexible woven fabric such as polyamide or polyester.

Further, as shown in FIGS. 5 and 6, the suture portion 16 forming the tension line LL in the airbag 11 when inflated is inflated toward the gas inflow portion 14 by a suture thread 10 such as a polyester thread. A projection 16a having a curved shape is provided, and a recess 16 is provided on the side opposite to the gas inflow section 14 side.
b, the inner side wall portion 12 and the outer side wall portion 13 are stitched in a closed loop shape. In the case of the embodiment, the four sewn portions 16 are arranged side by side in the front-rear direction of the vehicle at a vertically intermediate portion of the airbag 11 when inflated.

As shown in FIGS. 3 and 4, the airbag 11 is accommodated in a bellows-folded shape at the periphery of the door opening W, is covered with a garnish 30 on the front pillar side, and has a roof interior material on the roof side rail side. 32.

The garnish 30 is made of a synthetic resin such as ABS or polypropylene, and has a mounting base 30a, a base 30b,
A door portion 30d having an integral hinge 30e arranged so as to be pushed and opened by the airbag 11 when the airbag 11 is inflated is provided, and is fixed to the body 28 with a clip 24 or a bolt. Have been. The clip 24 and the like are attached to a mounting belt 26 described later.
At the same time, it also serves to attach the airbag 11 to the body 28 by passing through the predetermined attachment hole 15a of the airbag 11.

The roof interior material 32 is made of a synthetic resin such as urethane or polypropylene, and has a mounting base 32a and a base 32.
b. It is configured to include a skin 32c, is fixed to the body 28 by a clip 24 or a bolt, and locks a tip 32d to a door trim 33 connected to the body 28.
When the airbag 11 is inflated, the airbag 11
The leading end 32d comes off the door trim 33.

The folded airbag 11 is wrapped with a synthetic resin mounting belt 26 at a plurality of predetermined locations and covered with a garnish 30 and a rule interior material 32. The attachment belt 26 has a thin breakable portion 26 a that breaks when the airbag 11 is inflated, and is fastened together by a clip 24 or a bolt for attaching the airbag 11 to the body 28.

The mounting hole 1 on the rear end side of the airbag 11
5a is the body 2 without using the mounting belt 26.
8, the bolt 35 screwed into the airbag 1 is inserted.
One rear end is attached to the body 28.

At the front end side of the airbag 11, a substantially cylindrical gas inflow portion 14 surrounding an inflator 18 is provided.
The inflator 18 is pressed against the outer peripheral surface of the inflator 18 by a mounting bracket 19 mounted on the body 28, and is mounted on the body 28 using the mounting bracket 19.

As shown in FIGS. 2, 7, and 8, the inflator 18 is disposed below the front pillar and below the belt line BL, and has a gas discharge port 18b at its upper end for discharging an inflation gas. A main body 18a,
And a cylindrical sheet metal diffuser 18c pressed into the main body 18a so as to cover the periphery of the gas discharge port 18b.
And the body 2 is mounted using the mounting bracket 19.
8 attached. 18d is a lead wire for operating the inflator 18.

The mounting bracket 19 is formed of a bent sheet metal, and as shown in FIGS. 7 to 9, the cylindrical portion 2 covering the diffuser 18c with the gas inflow portion 14 interposed therebetween.
0, and a mounting portion 21 extending from the cylindrical portion 20 and having mounting holes 21a and 21a, and the inner diameter can be reduced via connecting portions 19a provided with slits 19b at both ends of the cylindrical portion 20. A substantially cylindrical holding portion 22 is formed and connected.

The inner diameter of the cylindrical portion 20 is the same as that of the inflator 1.
The outer diameter of the gas inflow portion 14 is approximately equal to or slightly larger than the outer diameter of the gas inflow portion 14 while the attachment portion 15 is bent around the diffuser 18c of No. 8.

The holding portion 22 has an end portion 22 bent to the outer peripheral side.
b and a substantially cylindrical belt-shaped pressing surface portion 2 having an end portion 22c overlapping the inside of the end portion 22b and having an inner peripheral surface as a substantially cylindrical surface.
2a and a connecting portion 22d made of sheet metal fixed so as to connect the outer peripheral surfaces of the ends 22b and 22c. The pressing portion 22a is plastically deformed so as to pinch the connecting portion 22d. The inner diameter of the inner peripheral surface is reduced. Note that, in the case of the embodiment, the end portions 22b and 22c are formed at positions facing the connecting portion 19a.

Pressing surface portion 22a before pinching connecting portion 22d
Is the inner diameter of the diffuser 1 of the inflator 18.
8c around the gas inflow portion 1 while bending the attachment portion 15
4 is slightly larger than the outer diameter when the outer portion 4 is provided, and the inner diameter when the connecting portion 22d is pinched is made to cover the gas inlet portion 14 around the diffuser 18c of the inflator 18 while bending the mounting portion 15. The length of the connecting portion 22d and the end 2
2b and 22c are set.

When the mounting bracket 19 is used, the gas inflow portion 14 is exteriorized around the diffuser 18c of the inflator 18 while bending the mounting portion 15, and the cylindrical portion 20 and the holding portion 22 of the mounting bracket 19 are further surrounded therearound.・ Put 22 in place and pinch it with pliers or the like so as to plastically deform the connecting portion 22d. Then, the pressing surface portion 22a
In order to reduce the inner diameter by reducing the diameter and maintain the inner diameter by plastic deformation of the connecting portion 22d, the gas inflow portion 14 of the airbag 11 externally mounted on the cylindrical diffuser 18c is formed by the outer peripheral surface of the diffuser 18c. It has good sealing properties and is pressed against.

After that, the mounting bolt 37 is screwed into the body 28 through each mounting hole 21a of the mounting portion 21, so that the inflator 18 with the gas inflow portion 14 attached thereto is attached to the body 28.
Can be easily attached and fixed.

Therefore, the airbag device M of the embodiment
In 1, by using the mounting bracket 19, the airbag 11 and the inflator 18 can be easily assembled while securing the sealing property, and the mounting of the inflator 18 to the body 28 becomes easy.

When the inflator 18 is attached to the body 28 together with the gas inlet portion 14 of the airbag 11 by the attachment bracket 19, the airbag 11 is folded and wrapped around each attachment belt 26, and at the same time, each Attachment belt 26 is clipped or bolted, and bolt 35 is screwed in, so that the portion of airbag 11 other than gas inflow portion 14 is attached to body 28.

Then, in the airbag device M1 of the embodiment, when the inflation gas is discharged from the gas discharge port 18b of the inflator 18, the breakable portion 2 of each mounting belt 26
6a, the door portion 30d of the garnish 30 is pushed open, and the front end 32 of the roof interior material 32 is opened.
The airbag 11 is inflated so as to close the door opening W by pushing the d side to open.

In the airbag apparatus M1 of the embodiment, the inflator 18 is illustrated in which the cylindrical diffuser 18c is press-fitted and connected to the main body 18a, but the diffuser 18c is rolled as shown in FIG. Inflator 3 attached to main body 18a
8 may be used. In this case, inflator 3
8, the irregularities 38a are formed around the diffuser 18c, and the irregularities 38a of the inflator 38 are formed.
Of the airbag 11
If the gas inflow portion 14 is press-contacted, the gas inflow portion 14 can be prevented from coming off from the inflator 38, and the assembling strength of the airbag 11 and the inflator 38 can be improved.

The inflator 18.3 of the embodiment
In FIG. 8, the main body 18a is provided with a diffuser 18c, but the main body 18a without the diffuser 18c is shown.
In the inflator consisting of only
The gas inflow portion 14 may be provided directly on the outer peripheral surface of the gasket.

Further, in the embodiment, the mounting bracket 1
9 shows an arrangement in which two pressing surface portions 22a are arranged. However, an arrangement in which only one pressing surface portion 22a is provided may be used. In addition, a mounting bracket 39 as shown in FIGS. Is also good. The mounting bracket 39 is made of sheet metal and has the same cylindrical portion 20 as the mounting bracket 19.
And a mounting part 21, and a substantially cylindrical holding part 42 is arranged at both ends of the cylindrical part 20 via a connecting part 19 a having a slit 19 b. The holding part 42 has a substantially cylindrical belt-shaped pressing surface part 42 a having an end part 42 b extending to the outer peripheral side and an end part 42 c entering the inside of the end part 42 b and having an inner peripheral surface as a substantially cylindrical surface. A connecting portion 42d made of sheet metal fixed so as to connect the portions 42b and 42c to each other. The connecting portion 42d is tilted so as to pull the end 42b side, and the pressing surface portion 42a is plastically deformed. , The inner diameter of the inner peripheral surface of the pressing surface portion 42a is reduced, and such a configuration may be adopted.

Further, in the embodiment, the airbag device M1 arranged from the front pillar inside the vehicle to the roof side rail has been described, but the airbag device M1 arranged from the quarter pillar or center pillar on the rear side of the vehicle inside the vehicle to the roof side rail can be used. A bag may be arranged, in which case, an inflator 18 is arranged below the belt line BL below the quarter pillar and the center pillar, and the gas inflow portion 14 extends to the inflator 18. The Rukoto.

[Brief description of the drawings]

FIG. 1 is a diagram showing a conventional airbag.

FIG. 2 is a diagram showing a side airbag device in which the airbag of one embodiment of the present invention is used.

FIG. 3 is a sectional view taken along a line III-III in FIG. 2;

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2;

FIG. 5 is a diagram showing a state at the time of operation of a side airbag device using the airbag of the embodiment.

FIG. 6 is a front view showing the airbag of the embodiment when inflated.

FIG. 7 is an enlarged cross-sectional view of an inflator portion of the embodiment.

FIG. 8 is a longitudinal sectional view of a portion VIII-VIII in FIG. 7;

FIG. 9 is a perspective view of a mounting bracket used in the embodiment.

FIG. 10 is an enlarged cross-sectional view of an inflator portion showing a modification of the embodiment.

FIG. 11 is a perspective view showing a mounting bracket according to another embodiment.

FIG. 12 is a longitudinal sectional view showing a use mode of the embodiment.

[Explanation of symbols]

 1.11 airbag, 14 gas inflow section, 1838 inflator, 1939 mounting bracket, 21 mounting section, 22a42a pressing surface, W door opening, M0M1 side airbag apparatus.

Continued on the front page. (72) Inventor Toshinori Tanase, 1 Ochiai, Nagahata, Kasuga-cho, Nishi-Kasugai-gun, Aichi Prefecture Inside Toyota Gosei Co., Ltd. (72) Inventor Hiroki Nakajima 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation

Claims (1)

[Claims] 1. An airbag which is folded at the periphery of a door opening on the inside of a vehicle and which is deployed so as to cover the door opening when inflated, and a substantially cylindrical airbag which supplies inflation gas to the airbag. And an inflator, wherein a substantially cylindrical gas inflow portion is formed in the airbag,
A side airbag device in which the gas inflow portion is connected to an exterior of the inflator, the mounting comprising a substantially cylindrical pressing surface portion capable of reducing the diameter and a mounting portion mountable to a vehicle body. A bracket is used, the pressing surface portion of the mounting bracket is arranged around the gas inflow portion provided on the inflator to reduce the diameter, and the gas inflow portion is pressed against the outer peripheral surface of the inflator, A side airbag device, wherein the gas inlet and the inflator are attached to the body by attaching an attachment to the body.