JPH04176751A - Air bag device for vehicle - Google Patents

Abstract

PURPOSE:To ease the shock received by a passenger by attaching a reinforcement member along the peripheral part of the gas inlet port of an air bag body formed of a fabric using a welf and a warp, inserting a band expansion regulating member through a locking piece, and fixing both the end parts of the expansion regulating member to the reinforcement member. CONSTITUTION:At the time of a collision of a vehicle, an ignition device built in an inflator is operated to send a high pressure gas into an air bag body 1 through a gas inlet port 1a, and the air bag body 1 is expanded and extended. The excessive expansion of the air bag 1 is regulated by an expansion regulating member 15 mounted between a locking piece 13 and a reinforcement member 11 to make the expanded form of the air bag 1 constant. Although, a shocking tension is added to the expansion regulating member 15 when the air bag 1 is expanded, such a tension is absorbed by the weave slippage between a warp 19a and a welf 19b situated near the locking piece 13. Thus, the shock received by the passenger at the time of the collision of the vehicle can be eased.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is arranged in an instrument panel of an automobile or in a center pad of a steering wheel.
The present invention relates to an airbag device that cushions the impact on an occupant when a sudden decrease in acceleration occurs, such as during a vehicle collision.

Conventional Technology Conventionally, when the impact force at the time of a vehicle collision exceeds a predetermined value, the detonator is ignited to start the gas container, and the gas container is folded into the instrument panel or the center pad of the steering wheel. 2. Description of the Related Art An airbag device is known that inflates and deploys an airbag body stored in a closed state to soften the impact on an instrument panel or a front wind panel of an occupant.

As an example of the structure of such an airbag, for example,
4-90841 discloses the configuration shown in FIG. 5. 1 in the figure is an airbag body, and the illustrated example shows the airbag body 1 in an inflated and deployed state. Reinforcement patches 3a, 3b are provided around the gas inlet 1a and the gas collision portion 1b of the airbag body 1.
are firmly fixed, and band-shaped bulge regulating members 5a, 5b, 5c, and 5d are attached between the reinforcing patches 3a and 3b. Both ends of the bulge regulating members 5a, 5b, 5c, 5d and the reinforcing patches 3a, 3b are usually sewn at sewing parts 7, 7, . . . , respectively.

According to such an airbag device, when a vehicle collides, an input signal from a collision detection sensor activates a detonator built in the inflator (not shown), and air is released from the gas inlet 1a as shown by arrow A. When high-pressure gas is fed into the bag body 1 and the airbag body 1 is inflated and deployed, the expansion regulating members 5a, 5b, 5c, and 5d make the airbag body 1 approximately spherical, preventing excessive expansion. It is possible to prevent secondary collisions caused by this to the occupants.

Problems to be Solved by the Invention However, in the case of such a conventional vehicle airbag device, both ends of the expansion regulating members 5a, 5b, 5c, and 5d are sewn by the sewing portions 7 to prevent gas flow from the surrounding area of the gas inlet 1a and the gas inflow port 1a. Since it was fixed to the periphery of the collision part 1b, complicated processes such as sewing were required when manufacturing the airbag body 1, and
A reinforcing patch 3 is separately provided to maintain the strength of the sewn portion 7.
Since it is necessary to prepare a and 3b, there is a problem in that the cost increases.

Furthermore, the sewn parts 7, 7... are likely to break due to the impact force caused by the rapid inflation of the airbag main body 1, and if such breakage occurs, the airbag main body 1 at the time of inflation tends to break.
This includes the problem that the shape of the image is not constant.

Therefore, the present invention solves the problems of conventional vehicle airbag devices, simplifies the manufacturing process, and makes it possible to keep the shape of the airbag body constant when inflated. The purpose of this invention is to provide an airbag device that can

Means for Solving the Problems In order to achieve the above object, the present invention comprises an inflator that generates high pressure gas, an airbag body stored in a folded state, and a control means for starting the inflator. In a vehicle airbag device in which an airbag body is inflated and deployed toward a vehicle interior based on a signal, first, according to claim 1, the airbag body is
Mainly composed of a woven fabric using warp and weft yarns, a reinforcing member is attached to a portion along the periphery of the gas inlet of the airbag body, and the portion is inside the airbag body and faces the gas inlet. A locking piece is formed by separating a plurality of warps or wefts of the fabric constituting the airbag body by a predetermined length toward the inside of the airbag body, and forming a locking piece that stands up in a loop shape. A band-shaped bulge regulating member is inserted through the bulge regulating member, and both ends of the bulge regulating member are fixed to the reinforcing member. It is thicker than the warp or weft used in general parts.

Further, according to a third aspect of the present invention, the locking pieces are formed at a plurality of locations inside the airbag body, and according to a fourth aspect of the present invention, there is provided a vehicle airbag device in which a rising portion of the locking piece is formed in an arc shape. This is the composition.

Function: According to the configuration of the airbag device, the detonator built into the inflator is activated in the event of a vehicle collision, etc.
High-pressure gas is sent into the airbag body from the gas inlet, and the airbag body inflates and deploys. At this time, the expansion restriction member installed between the locking piece and the reinforcing member prevents the airbag body Excessive expansion is controlled and the expanded shape of the airbag body remains constant.

When the airbag body inflates, an impactful tension is applied to the expansion regulating member, but this tension is absorbed by the misalignment of the fabric located near the locking piece. There is no risk of the bulge regulating member being broken.

Furthermore, the strength of the locking piece itself is improved by forming the warp or weft threads constituting the locking piece to be thicker than threads used in other general parts.

Furthermore, by forming the locking pieces at multiple locations within the airbag body, it is possible to appropriately select the locking piece through which the expansion regulating member is inserted from among the plurality of locking pieces. The degree of freedom in the shape of the airbag body can be increased.

In addition, by forming the rising part of the locking piece in an arc shape, a uniform force is applied to the warp or weft that makes up the locking piece when the airbag body is inflated, so the strength of the locking piece itself is stabilized. Effect can be obtained.

Embodiment Hereinafter, an embodiment of a vehicle airbag device according to the present invention will be described in detail with reference to the drawings, with the same reference numerals attached to the same components as in the conventional structure.

Figure 1 is an overall external view of the airbag body 1 to which this embodiment is applied, and Figure 2 is a partially cutaway view of the same.The airbag body 1 is mainly made of jacquard fabric woven with warp and weft. It is configured.

Reference numeral 1a denotes a gas inlet opening in a substantially circular shape on one surface of the airbag body 1, and the airbag body 1 along the periphery of the gas inlet 1a has a large number of holes 9, 9
... is opened, and an annular reinforcing member 11 is disposed inside the airbag body 1 along the periphery of the gas inlet 1a, and is opened along the annular portion of the reinforcing member 11. The holes 12, 12, . . . are fixed to the holes 9, 9, . . . of the airbag body 1 using fasteners not shown.

On the other hand, a plurality of warps 19b or wefts 19a of the fabric constituting the airbag body 1 are inserted into the airbag body 1 by a predetermined length at a portion facing the gas inlet 1a inside the airbag body 1. A locking piece 13 is formed that separates toward the direction and stands up in a loop shape, and this locking piece 13
A band-shaped bulge regulating member 15 is inserted through the bulge regulating member 15, and both ends of the bulging regulating member 15 are fixed to opposing positions of the reinforcing member 11 using fixtures 17 and 17.

In the illustrated example, for a plurality of wefts 19a, 19a... in the fabric constituting the airbag body 1, the wefts 19a,
Warp threads 19b, 19b woven into 19a...
The locking piece 13 is constructed by separating every other weft thread from the weft threads 19a, 19a'' and raising it up inward of the airbag body 1 by a certain length in a loop shape.

The warps 19b, 19b, . . . may be made to stand up every few warps, and the locking piece 13 may be constructed by making the weft 19a stand up in the same way instead of the warp 19b.

The total length of the locking piece 13 is approximately 40 mm to 5 Q mm, and the width is approximately 6 mm.
Although 0 mm is appropriate, these dimensions can be changed as appropriate depending on the strength required of the airbag body 1. Furthermore, if the rising portion of the locking piece 13 is fixed using an adhesive, it is possible to further increase the strength of the locking piece 13.

The locking piece 13 can be easily manufactured by programming during the weaving process procedure when manufacturing the airbag body 1, and the warp 19b or weft 19a constituting the locking piece 13 can be easily manufactured by It can also be made thicker than threads used in other general parts.

According to this configuration of the airbag body 1, in the event of a vehicle collision, the detonator built in the inflator (not shown) is activated by the input signal from the collision detection sensor, and gas is injected into the airbag body 1 from the gas inlet 1a. High-pressure gas is fed into the airbag body 1 and the airbag body 1 is inflated and deployed. The bulging shape of the airbag body 1 can be made constant by regulating the airbag body 1.

When the airbag body 1 described above is inflated, the expansion regulating member 1
5 is subjected to an impactful tension, but such tension is caused by misalignment of the fabric located in the vicinity 21 of the locking piece 13, especially along the longitudinal direction of the warp 19b, as shown in FIG. This can be absorbed by positional misalignment, and therefore there is no risk that the bulge regulating member 15 will be broken by the above-mentioned impact force.

In addition, the warp 19b or the weft 19 constituting the locking piece 13
By forming the thread a to be thicker than the threads used in other general parts, the strength of the locking piece 13 itself is improved.

Therefore, according to the above embodiment, the bulge regulating member 1
It becomes possible to increase the fixing strength between 5 and the locking piece 13.

In the above embodiment, the locking piece 13 is attached to the airbag body 1.
Although an example is shown in which the locking piece 13 is formed in one place within the locking piece 13,
is not limited to one location, but may be formed at a plurality of appropriate locations. When the locking pieces 13 are provided at a plurality of locations, the locking piece through which the expansion regulating member 15 is inserted can be appropriately selected from among the plurality of locking pieces 13, and the airbag/socket body can be It is possible to increase the degree of freedom in the shape of the structure during expansion.

FIG. 4 shows a modification of the present invention, in which the warp 19b, which is separated from the wefts 19a, 19g,...
A feature is that the rising portions of 19b... are formed into circular arc shapes 23.

By forming such an arc shape 23 at the rising portion of the warp threads 19b, 19b, a uniform force is applied to the warp threads 19b forming the locking piece 13, so that the strength of the locking piece 13 itself is stabilized. is obtained.

Furthermore, if adhesive is applied to the rising portion of the locking piece 13 as described above, friction will not occur between the warp threads 19a and the weft threads 19b due to the impact force when the airbag body 1 is rapidly inflated. The thread breakage phenomenon caused by this friction is eliminated, and the strength of the locking piece 13 can be further increased.

Effects of the Invention As explained in detail above, according to the vehicle airbag device according to the present invention, the formation process of the locking piece can be easily programmed during the weaving process when manufacturing the airbag body. In addition, complicated processes such as sewing are not required, thereby simplifying the process and reducing costs.

Furthermore, even if an impactful tension is applied to the expansion regulating member when the airbag body is inflated, this tension is absorbed by the misalignment of the fabric located near the locking piece. There is no risk of the expansion regulating member being broken by the impact force of
It is possible to eliminate variations in the impact mitigation force that occupants receive when a vehicle crashes.

The strength of the locking piece itself is improved by making the warp or weft that constitutes the locking piece thicker than threads used in other general parts, and furthermore, the locking piece can be inserted into the airbag body. By forming the airbag at multiple locations, it is possible to appropriately select the locking piece through which the expansion regulating member is inserted from among the plurality of locking pieces, allowing freedom in the shape of the airbag body when inflated. This has the effect of expanding the degree.

Furthermore, by forming the rising part of the locking piece in an arc shape, it is possible to apply a uniform force to the warp or weft threads that make up the locking piece when the airbag body is inflated, thereby stabilizing the strength of the locking piece itself. The effect of doing so is demonstrated.

[Brief explanation of drawings]

Fig. 1 is an external view showing an embodiment of an airbag device according to the present invention, Fig. 2 is a partially cutaway view of Fig. 1, Fig. 3 is a partially enlarged view of Fig. 2, and Fig. 4 is a partially cutaway view of Fig. 1. FIG. 5 is a schematic diagram showing an example of a conventional airbag device. 1...Airbag body, 1a...Gas inlet, 11
...Reinforcing member, 13...Locking piece, 15...Bulge regulating member, 17...Fixing tool, 19a...Weft, 19b
...warp. Gland area IIL Nido Peng 1 - →

Claims (4)

[Claims] (1) Consisting of an inflator that generates high-pressure gas and an airbag body stored in a folded state, based on a signal from a control means that starts the inflator,
In a vehicle airbag device in which the airbag body is inflated and deployed in the direction of the vehicle interior, the airbag body is mainly composed of a woven fabric using warp and weft yarns, and a gas inlet of the airbag body is A reinforcing member is attached to a portion along the periphery of the airbag, and a plurality of warps or wefts of the fabric constituting the airbag body are attached to a predetermined length inside the airbag body and at a portion facing the gas inlet. A locking piece is formed that separates inward from the main body and stands up in a loop shape, and a band-shaped bulge-regulating member is inserted through this locking piece, and both ends of the bulge-regulating member are attached to the reinforcing member. A vehicle airbag device characterized by being fixed. (2) The vehicle airbag device according to claim 1, wherein the warp or weft forming the locking piece is thicker than the warp or weft used in other general parts. (3) The vehicle airbag device according to claim 1, wherein the locking pieces are formed at a plurality of locations inside the airbag body. (4) The vehicle airbag device according to claim 1, wherein the rising portion of the locking piece is formed in an arc shape.