JPH02220943A - Air bag in air bag device - Google Patents

Abstract

PURPOSE:To remarkably reduce man-hour by making an air bag of hollow woven textiles, at least a part of a selvedge of which is made of single web. CONSTITUTION:The base cloth 5 of an air bag is woven in a cylinder like form, a specified part 6 of which is made of single woven fabric. This single woven fabric part 6 is provided in conformity with the shape of the air bag. Cutting of the base cloth 5 along the line A-A on the single woven fabric part 6 forms trapezoidal air bags. Therefore, this process eliminates sewing work of a plurality of constitution members with the selvedge sections thereof put in order, resulting in remarkable reduction of man-hour. This also allows the introduction of mechanization.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an airbag device for protecting occupants by absorbing the impact generated during a vehicle collision, and particularly relates to an airbag device that is inflated by high pressure gas from an inflator during a vehicle collision. The present invention relates to an airbag in an airbag device for catching and stopping an occupant advancing forward.

[Prior art] Airbag device #9 installed on a fixed part of the car body in front of the seats of an automobile In an emergency such as a vehicle collision, airbag device #9 is released from an airbag fixed to a fixed part of the car body such as the steering wheel or the lower part of the instrument panel. It instantly expands due to the pressure of the reactant gas and plays an important role in protecting the occupants from injury caused by collision with the vehicle body.

As shown in FIG. 7, such an airbag device 01 uses a collision signal from a collision detection sensor to detonate a gas generating agent and release gas when the deceleration of the vehicle exceeds a certain level, for example. It consists of an inflator 02 that ejects water, and an airbag 03 that is inflated by the gas ejected from the inflator 02, the base of which is fixed to the inflator 02. This airbag device o1 is attached to a fixed part of the vehicle body, such as the center of the steering wheel 04 or the lower part of the instrument panel 05, with the airbag 03 folded and stored in a pad.

Then, as shown in FIG. 7, the gas generating agent in the inflator 02 reacts during a vehicle collision, and the airbag 03 is instantaneously inflated and deployed by the generated gas. As a result, the airbag 03 is moved forward by the occupant M due to inertia.
It is designed to protect occupant M from collision with the vehicle body.

[Problems to be Solved by the Invention] By the way, among the airbags 03 in such an airbag device 01, the airbag 03 for occupants other than the driver is composed of one sheet, for example, as shown in FIG. 8(A). The bag main body part 03a and the pair of side parts 03b and 03c that the passenger touches are cut from the base fabric into a predetermined shape, and these are cut into a predetermined shape (
It is formed by aligning and suturing the ears as shown in B).

However, in this way, a plurality of constituent members (03a, 03b) of the airbag 03 are made from one base fabric.

If 03C) were to be cut and sewn together, a large number of man-hours would be required.

Moreover, it is difficult to mechanize the cutting work of the base fabric and the sewing work of aligning and sewing the edges, so not only do most of the work have to be done by hand, but there are many maw places.
It takes a lot of time and effort.

For these reasons, the productivity of airbags has not been very good in the past, and the present invention has been made in view of these circumstances, and its purpose is to reduce manufacturing man-hours and to An object of the present invention is to provide an airbag in an airbag device that can be mechanized and improve productivity.

[Means for Solving the Problem] In order to solve this problem, the present invention provides an airbag with:
It is characterized in that at least a portion of the selvage portion is formed from a single-ply bag weave fabric.

[Function] According to the airbag of the present invention having such a configuration, since the airbag is formed from a bag-woven fabric,
The airbag can be manufactured by pre-forming the base fabric of an airbag made of bag weave fabric woven in a single weave at a predetermined portion, and simply cutting this base fabric at the single weave part. Become. In this case, the bag weave in which a predetermined portion is woven in a single layer while other portions are woven into a cylindrical shape can be easily performed by a machine, so that the base fabric as described above can be easily formed.

This eliminates the conventional work of cutting multiple airbag components into a predetermined shape and sewing work of aligning the ears of the cut components and sewing them together, which not only greatly reduces the number of work steps. This will enable mechanization in airbag manufacturing.

Therefore, the productivity of airbags is greatly improved.

[Example code] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of an airbag according to the present invention.

As shown in FIG. 1, the airbag 1 is formed by a bag weave in which the ear portion 2 is a single weave portion of the side cloth a and the cloth. In addition, the airbag 1 has an opening 3 formed at its upper end, and a bottom 4 which is approximately rectangular, and when inflated, the airbag 1 has a truncated pyramid shape (a truncated cone, a truncated pyramid, or any of these). mixture). An inflator (not shown) is inserted into the airbag 1 through the opening 3, and the opening 3 is fixed to the inflator.

FIG. 2 shows the base fabric used to manufacture this airbag 1, and is a diagram illustrating the manufacturing process of the airbag 1. As shown in FIG.

As shown in FIG. 2(A), the base fabric 5 of the airbag 1 is
Tubular Woven Tag As is clear from the same figure (B), it is formed from a bag weave fabric in which a predetermined portion is made into a single weave portion 6. This heavy weave portion 6 is provided in accordance with the shape of the airbag to be manufactured.

As shown in FIG.
(a) By cutting the base fabric 5 along the line (
An airbag cutting member 7 as shown in C) is formed.

Then, cut the airbag cutting member 7 along line (b)-(b) shown in FIG. By joining 8 by an appropriate method such as adhesion, welding, etc., an airbag member 9 having a substantially rectangular bottom as shown in FIG. 3(D) is formed. By turning over this airbag member 9, the airbag 1 shown in FIG. 1 is formed. In that case, parts c and d may be partially cut.

In such an airbag 1, the air bag 1 can be made by simply cutting the base fabric 5 of bag weave, which is single-woven in a predetermined portion, into a predetermined shape at the single-ply weave portion, and performing joining 8 to adjust the shape of the airbag. Bag 1 can now be manufactured.

In that case, the joining process 8 is different from the conventional case of sewing together multiple structural members cut into a predetermined shape with their edges aligned, and is simply joined at a predetermined position, so it is less troublesome. Such a situation does not occur, and therefore, the number of man-hours for manufacturing the airbag 1 is reduced, and the airbag 1 can be manufactured in a short time and at low cost.

Furthermore, since the conventional work of cutting into a plurality of airbag constituent members and aligning the ears and sewing them together is eliminated, mechanization in airbag manufacturing becomes possible.

In addition, as an airbag especially for occupants other than the driver, the part e is sewn as shown in Fig. 3 (A) and (B).
The passenger airbag 1 of the top mount type has the opening 3 and the bottom 4 arranged at a predetermined angle as shown in FIG. can be formed.

FIG. 4 is a diagram showing a modification of the base fabric 5. Note that in the following modified examples and other embodiments, the same constituent members are given the same reference numerals, and detailed explanations thereof will be omitted.

In FIG. 4, the bag weave base fabric 5 has a predetermined portion as a single weave portion 6, similar to the base fabric shown in FIG. In this case, it is approximately trapezoidal in shape. By forming in this way, it is possible to increase the strength of the part (the lower part in the figure) where the opening for the inflator is formed and which becomes the inflator attachment part.

Further, in the above embodiment, the opening 3 into which the inflator is inserted is formed by cutting along the line (B)-(B) in FIG. 2(C). ,
For example, it may be formed at any other suitable position as shown by the two-dot chain line in the figure.

FIG. 5 is a diagram showing another embodiment of the present invention.

As shown in FIGS. 5(A) to 5(C), the tubular portion 9 (that is, the portion other than the heavy woven portion 6) of the hollow-woven base fabric 5 has a substantially circular side surface shape. Then, the cylindrical portion 9 is cut so as to form an ear portion 2 of a predetermined width along the side surface shape, thereby forming an airbag member 10 as shown in FIG. After forming the opening 3 in a predetermined position of the member 10, the member 10 is turned over to form a substantially circular airbag. This airbag is used as an airbag for the driver.

FIG. 6 is a diagram showing a modification of the airbag shown in FIG. 5.

In the airbag member 11 of this modification, a single-woven ear portion 2 is formed over the entire circumference of a circular cylindrical portion 9. In this embodiment as well, an airbag is formed by drilling an opening 3 for inserting an inflator at a predetermined position and then turning it over.

In the airbags of the embodiments shown in FIGS. 5 and 6, since there is no sewing process, the number of manufacturing steps can be further reduced, and the airbags can be manufactured more easily. In addition, it will be easier to mechanize manufacturing.

[Effects of the Invention] As is clear from the above description, according to the airbag of the present invention, at least a portion of the ear portion of the airbag is formed from a single-layer bag weave fabric, which is different from the conventional one. It is no longer necessary to cut out a plurality of structural members having a predetermined shape and to sew these plurality of structural members so that their ears are aligned, and the number of work steps can be significantly reduced.

Moreover, the elimination of these operations that make mechanization difficult allows mechanization for the production of airbags.

Therefore, the airbag of the present invention has significantly improved productivity compared to conventional airbags, and the airbag can be manufactured at low cost.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of an airbag in an airbag device according to the present invention, and FIG. 2 is a diagram showing the manufacturing process of this airbag. (B) is a sectional view taken along line IIB-IIB in FIG. 2; (C) is a diagram showing an airbag cutting member obtained by cutting the base fabric into a predetermined shape;
(D) is a diagram showing a shaped air valve member, and FIG. 3 is a diagram showing a modification of the airbag in FIG.
(A) is a diagram similar to Figure 1 (D), (B) is a diagram similar to Figure 3 (
A) is a sectional view taken along line IIIB-IIIB, (C) is a side view of this airbag when it is inflated, FIG. 4 is a diagram similar to FIG. 2 (A) showing a modification of the base fabric, and FIG. The figures are views showing other embodiments of the present invention, (A) is a view similar to FIG. C) is vc-vc in the same figure (A)
5 (D) is a view similar to FIG. 2 (C) showing the airbag cutting member; FIG. 6 is a cross-sectional view taken along the line; FIG. A diagram similar to D),
Fig. 7 shows a general airbag device installed in a car, Fig. 8 shows a conventional airbag, (A) shows the constituent members of this airbag, and (B) shows these. FIG. 1...Airbag, 2...Ear part 3...Opening Buddha
5...Base fabric, 6...- Heavy weaving department patent applicant Takata Co., Ltd. Representative Patent Attorney Kenji Aoki (5 others) Male 1 Figure 2 Figure 4 Co M3 (A) (B) Figure 5 (A) (B) (C) (D) Figure 6 Figure 8 (A) 3a

Claims (1)

[Claims] In an airbag in an airbag device that is inflated by high-pressure gas from an inflator activated in an emergency, at least a portion of the ear portion is formed from a single-layer bag weave fabric. Features an airbag.