JP2003300446A - Airbag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce likelihood of delay in inflation of an airbag caused by leakage of an inflator from a joint portion of the airbag, by enlarging an area of receiving face receiving an occupant, in the airbag. <P>SOLUTION: A first base cloth 1, a second base cloth 2 and a receiving base cloth 3 are provided, an edge of the first base cloth 1 is connected with an edge of the second base cloth 2, an edge of the receiving base cloth 3 is connected with edges of the first base cloth 1 and second base cloth 2 to provide the airbag in a developed state. A rear edge 1b of the first base cloth 1 is joined with a lower edge 3b of the receiving base cloth 3, a rear edge 2b of the second base cloth 2 is joined with an upper edge 3a of the receiving base cloth 3, the other edges 1c, 1d, 2c, 2d, 3c, 3d of the first base cloth 1, second base cloth 2 and receiving base cloth 3 are joined together to form the airbag in a shape of bag. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a passenger vehicle, a commercial vehicle,
In vehicles such as buses, it is placed in front of the seat (in the center of the steering wheel in the case of the front seat, in the instrument panel, in the case of the rear seat, in the seat back of the front seat, etc.). In regard to the airbag device, the invention relates to the configuration of the airbag.

[0002]

2. Description of the Related Art Generally, an airbag as described above is formed by cutting a base cloth having a predetermined shape from a cloth body and joining the base cloth into a bag shape (sewing by sewing, bonding by adhesive, high frequency wave, ultrasonic wave, heat welding). Etc.). Instead of simply inflating the airbag with a round shape, as disclosed in, for example, Patent Document 1, the receiving surface for receiving the occupant in the airbag is formed into a flat shape instead of a spherical shape inflated toward the occupant. It is required to inflate the airbag. This is because when the airbag is inflated, the occupant is received by the flat receiving surface so that the load when the occupant is received is not concentrated on a part of the occupant but is dispersed.

[0003]

[Patent Document 1] Japanese Patent Laid-Open No. 2001-260788 (FIGS. 3, 4, and 6)

[0004]

According to the structure of Patent Document 1, the receiving surface for receiving the occupant in the airbag (26 (18) in FIG. 6 of Patent Document 1) is flat, but the receiving surface is Has a triangular shape when viewed from the occupant (see FIG. 6 of Patent Document 1), there is room for improvement in terms of increasing the area of the receiving surface. Further, according to the structure of Patent Literature 1, when the airbag is inflated, the joint portion where the base cloth and the base cloth are joined (13 and 14 in FIG. 4 and FIG. 6 of Patent Literature 1) is inflated air. It is located in the center of the top of the bag. In this case, the gas of the inflator (located at 23 in FIGS. 4 and 6 of Patent Document 1) flows into the airbag, and when the airbag is inflated, the gas of the inflator hits the center of the upper portion of the airbag and lifts it. It becomes like this. As a result, if a situation occurs in which gas from the inflator leaks at the central joint at the top of the airbag, the situation may lead to a situation in which inflation of the airbag is delayed.

In the case of making the receiving surface of the airbag flat, it is necessary to inflate the airbag in a direction slightly different from the direction of the inflator, such as an airbag for a passenger seat, or the inflator. The distance from the passenger to the passenger may be relatively long. Furthermore, in order to inflate the airbag so that the receiving surface is flat, it has been proposed that an auxiliary cloth that regulates the shape of the airbag when inflated is placed inside the airbag. The base cloth is joined in a bag shape with the auxiliary cloth arranged. In this case, the addition of the auxiliary cloth to the base cloth may increase the entire joint length when the airbag is formed into a bag shape, and there is room for improvement in terms of reduction in production cost.

According to the present invention, in the airbag, the area of the receiving surface for receiving the occupant is increased, and the gas of the inflator leaks from the joint portion of the airbag, which may lead to a situation in which the inflation of the airbag is delayed. The purpose of this is to suppress the air bag, and when the air bag needs to be inflated in a direction slightly different from the direction of the inflator, or the distance from the inflator to the occupant may be relatively long, When an auxiliary cloth that regulates the shape of the airbag is provided, it is intended to prevent the overall joint length from increasing.

[0007]

[I] According to the features of claim 1 (claim 2), in the deployed state (the state before joining), the airbag is provided with the first base cloth, the second base cloth and the receiving member. It is in the form of a sheet or sheet having a base cloth (and an auxiliary base cloth) (one side portion of the first and second base cloths is connected (for example, see A1 in FIGS. 1 and 11). ), One side of the receiving base fabric is connected to the side of the first and second base fabrics (see, for example, A2 and A3 in FIGS. 1 and 11).
(In addition, the auxiliary base fabric is connected to the upper side or the lower side of the receiving base fabric (see, for example, A4 and B2 in FIG. 1)).

According to the feature of claim 1 (claim 2), in the airbag in the above-mentioned state, as shown in, for example, FIG. 1 and FIG. 2 (a), the rear side portion 1b of the first base cloth 1 And the lower side portion 3b of the receiving base cloth 3 are joined together, the rear side portion 2b of the second base cloth 2 and the upper side portion 3a of the receiving base cloth 3 are joined together,
Second, the other side portions 1c, 1 of the receiving base fabrics 1, 2, 3
By joining d, 2c, 2d, 3c, 3d (and joining the front side portions 1a, 2a of the first and second base cloths 1, 2 and the end portions 4a, 5a of the auxiliary base cloths 4, 5). Therefore, the airbag can be configured in a bag shape.

[II] According to the features of claim 1 (claim 2), the gas of the inflator 6 flows into the airbag to inflate the airbag, as shown in FIG. (B) As shown in (b), the gas of the inflator 6 flows toward the receiving base cloth 3 while lifting the second base cloth 2, and the first and second base cloths 1 and 2 (and the auxiliary base cloths 4 and 4). 5) is in a state of being extended to the rear of the vehicle body (rightward on the paper surface of FIGS. 4A and 4B). The rear side portion 2b of the second base cloth 2 and the upper side portion 3a of the receiving base cloth 3 are lifted, and the receiving base cloth 3 is in a state of being extended above the vehicle body (above the paper surface of FIGS. 4A and 4B). .

Thus, according to the features of claim 1 (claim 2), when the gas of the inflator flows into the airbag and the airbag is inflated, the first base cloth and the second cloth are lifted up. Between the rear side of the first and second base cloths, the base cloth is in a state of being extended to the rear of the vehicle body, and the receiving base cloth is provided with upper and lower sides and one and the other side sides. The surface of the receiving base cloth in 1 is likely to be rectangular (for example, rectangular) instead of circular when viewed from the occupant.

According to the second aspect of the invention, since the auxiliary base cloth is connected to the upper side or the lower side of the receiving base cloth, the auxiliary base cloth suppresses the state where the central portion of the receiving base cloth tends to expand. Therefore, the lateral side portion of the receiving base cloth to which the auxiliary base cloth is not connected is easily expanded. As a result, the state in which the central portion of the receiving base cloth expands and the receiving base cloth becomes spherical toward the occupant is suppressed, and the surface of the receiving base cloth easily becomes flat.

In this case, according to the feature of claim 2, when the gas of the inflator 6 flows toward the receiving base cloth 3 as shown in FIG.
When the auxiliary base cloth 4 is positioned between the receiving base cloth 3 and the receiving base cloth 3, the gas of the inflator 6 is transferred to the auxiliary base cloth 4
It becomes difficult to flow to the central portion side of the receiving base cloth 3 due to the obstacles, and it becomes easy to flow to the lateral side portion of the receiving base cloth 3. As a result, the expansion of the central portion of the receiving base cloth 3 tends to be delayed with respect to the expansion of the lateral side portion of the receiving base cloth 3, and the surface of the receiving base cloth 3 tends to be flat, so that the surface of the receiving base cloth 3 tends to be flat. It is possible to suppress a state in which the central portion side is rapidly expanded and the surface of the receiving base fabric 3 is spherical toward the occupant.

[III] According to the features of claim 1 (claim 2), as described in [II], when the gas of the inflator flows into the airbag and the airbag is inflated,
Since the direction in which the airbag is inflated is substantially determined by the first and second base fabrics because the first and second base fabrics are extended rearward of the vehicle body while the second base fabric is being lifted. Even if the direction of the inflator is slightly different from the direction in which the airbag is desired to be inflated, by properly setting the first and second base fabrics, the airbag can be appropriately inflated in the desired direction.

In this case, according to the features of claim 1 (claim 2), if the distance from the inflator to the occupant is relatively long, the first and second base cloths can be made long accordingly. The position of the receiving base fabric when the airbag is inflated can be set to an appropriate position for the occupant by adjusting the lengths of the first and second base fabrics.

[IV] According to the features of claim 1 (claim 2), the center of the second base cloth is the center of the upper part of the airbag (see FIG. 4B). In this case, as described in the above item [I], one side portion of the first and second base cloths is connected, and the other side portion of the first and second base cloths is configured to be joined. Therefore, the second base cloth is not in a state in which the joint portion exists in the center thereof.

Thus, according to the features of claim 1 (claim 2), when the gas of the inflator flows into the airbag and the airbag is inflated, the gas of the inflator is located at the center of the upper portion of the airbag (second group). Since there is no joint part in the center of the upper part of the airbag (the center of the second base cloth) even when the upper part of the airbag is lifted by hitting the center of the cloth, as in Patent Document 1, the center of the upper part of the airbag is There is no possibility that gas from the inflator will leak at the joint.

[V] According to the feature of claim 2, when the airbag is formed into a bag shape as described in [I], the outer peripheral portions (front and rear side portions of the first and second base cloth, The airbag can be formed into a bag by only joining the side portions), and since one side portion of the first and second base fabrics is connected in advance, the first and second The point that it is not necessary to join all of the outer peripheral portions (front and rear side portions, side portions) of the base cloth,
Also, when joining the outer peripheral portions (front and rear side portions, side portions) of the first and second base cloth, the upper and lower side portions of the receiving base cloth,
Since the end portions of the auxiliary base cloth can be joined together, the overall joining length when the airbag is formed into a bag shape can be suppressed to a short joining length.

[VI] According to the characteristics of claim 3, the "action" described in [I] to [V] is the same as in claim 2.
In addition to this, the following "action" is provided. According to the feature of claim 3, when the first base cloth is provided with the attachment portion to be attached to the inflator, the auxiliary base cloth is provided with the attachment portion to be attached to the inflator together with the attachment portion of the first base cloth. Thus, according to the feature of claim 3, since the mounting portions of the first base cloth and the auxiliary base cloth are mounted on the inflator, the inflator of the airbag is compared with the case where only the mounting portion of the first base cloth is mounted on the inflator. It is possible to increase the attachment strength to the.

[VII] According to the characteristics of claim 4 (claim 5), the same as the case of any one of claims 1 to 3 (similar to the case of claim 2 or 3), I] ~
It has the function of [VI] and additionally has the following "function". According to the feature of claim 4, the first base cloth, the second base cloth and the receiving base cloth are integrally configured by one cloth body, and according to the feature of claim 5,
The base cloth, the second base cloth, the receiving base cloth, and the auxiliary base cloth are integrally configured by one cloth body. Thereby, according to the feature of claim 4 (claim 5), the first base cloth, the second base cloth and the receiving base cloth (and the auxiliary base cloth) are separately prepared and joined by sewing machine sewing, etc. It is not necessary to do something like obtaining an airbag in a deployed state (state before joining) as described in [I].

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION [1] FIG. 1 shows a state in which an airbag is inflated (a state before joining). The first base cloth 1, the second base cloth 2, the receiving base cloth 3, and the first auxiliary base cloth. 4 and a second auxiliary base cloth 5, and the first base cloth 1, the second base cloth 2, the receiving base cloth 3, the first and second auxiliary base cloths 4 and 5 are one cloth body 10
(See FIG. 6) is integrally cut.

As shown in FIG. 1, the first base cloth 1 has a hexagonal shape (first mountain fold line portion A1 and second mountain fold line portion A).
2), the front side portion 1a corresponding to the front side of the vehicle body when inflated,
A rear side portion 1b corresponding to the rear side of the vehicle body when inflated, a first side edge portion 1c and a second side edge portion 1d corresponding to one of the right side and the left side of the vehicle body when inflated are provided, and an inflator 6 described later is provided. An opening 1e for mounting the is provided near the front side 1a. In the first base cloth 1, the side portion corresponding to the other of the right side and the left side of the vehicle body when inflated, the second base cloth 2 and the receiving portion via the first and second mountain fold line portions A1 and A2. Base cloth 3
Connected to.

As shown in FIG. 1, the second base cloth 2 has a hexagonal shape having the same shape and the same size as the first base cloth 1 (the first mountain fold line portion A1 and the third mountain fold line A1). (See section A3), the front side portion 2a corresponding to the front side of the vehicle body when inflated, the rear side portion 2b corresponding to the rear side of the vehicle body when inflated, and the first side corresponding to one of the right side and the left side of the vehicle body when inflated. Side portion 2c and second side portion 2d
Is provided. In the second base cloth 2, the side portion corresponding to the other of the right side and the left side of the vehicle body when inflated, the first base cloth 1 and the receiving portion via the first and third mountain fold line portions A1 and A3. It is connected to the base cloth 3.

As shown in FIG. 1, the receiving base cloth 3 has an elongated hexagonal shape (second and third mountain fold line portions A2, A2).
(See A3), and the first valley fold line portion B1 is set in the center. An upper side portion 3a corresponding to an upper side of the vehicle body when inflated, a lower side portion 3b corresponding to a lower side of the vehicle body when inflated, a first side portion 3c and a second side portion corresponding to one of a right side and a left side of the vehicle body when inflated. The side edge portion 3d is provided on the receiving base cloth 3. In the receiving base fabric 3, the side portions corresponding to the other of the right side and the left side of the vehicle body when inflated are the second and third mountain fold line portions A2, A.
It is connected to the first and second base fabrics 1 and 2 via 3.

As shown in FIG. 1, the first auxiliary base cloth 4 has a rectangular shape (see the second valley fold line portion B2), and the upper side of the receiving base cloth 3 is interposed via the second valley fold line portion B2. It is connected to the central portion of the portion 3a. In the first auxiliary base cloth 4, an opening 4b for attaching an inflator 6 described later has an end 4a.
Is provided in the vicinity of, and a through hole 4c is provided between the opening 4b and the second valley fold line portion B2.

As shown in FIG. 1, the second auxiliary base fabric 5 is the first
It has the same shape and the same rectangular shape as the auxiliary base cloth 4 (see the fourth mountain fold line portion A4), and the fourth mountain fold line portion A4.
It is connected to the central portion of the lower side portion 3b of the receiving base cloth 3 via. In the second auxiliary base cloth 5, an opening 5b for attaching an inflator 6 described later is provided near the end 5a. In this case, the first auxiliary base cloth 4 is set to be slightly longer than the second auxiliary base cloth 5.

[2] Next, the step of joining the airbag in the expanded state (state before joining) as described in the above item [1] into a bag shape will be described. In the airbag in the deployed state (state before joining) shown in FIG. 1, as shown in FIG. 2A, the first, second, and third mountain fold line portions A1, A2, A3
Is folded and the first and second base cloths 1 and 2 are overlapped. The first valley fold line B1 is valley-folded to fold the receiving base cloth 3 in two, and the receiving base cloth 3 is sandwiched between the first and second base cloths 1 and 2. As shown in FIG. 2B, the fourth mountain fold line portion A4 is mountain-folded, the second valley fold line portion B2 is valley-folded, and the first and second auxiliary base fabrics 4 and 5 are superposed on each other. , The first and second auxiliary base fabrics 4 and 5 are superposed on the first base fabric 1 (on the side opposite to the second base fabric 2).

As a result, FIG. 2 (a) (b) and FIG.
As shown in (a), the rear side 1b of the first base cloth 1, the lower side 3b of the receiving base cloth 3, the first side 1c of the first base cloth 1 and the first side of the receiving base cloth 3. The portion 3c, the rear side 2b of the second base cloth 2, the upper side 3a of the receiving base cloth 3, and the first side of the second base cloth 2
The side portion 2c and the second side portion 3d of the receiving base cloth 3 are put together. The second side 1d of the first base cloth 1, the second side 2d of the second base cloth 2, the front side 1a of the first base cloth 1 and the front side 2a of the second base cloth 2 are combined. It The front side portions 1a, 2a of the first and second base cloths 1, 2 and the end portions 4a, 5a of the first and second auxiliary base cloths 4, 5 and the opening 1e of the first base cloth 1 and the first and second The openings 4b and 5b of the auxiliary base fabrics 4 and 5 are fitted together.

As shown in FIGS. 2A and 2B and FIG. 3A, the rear side portion 1b of the first base cloth 1, the lower side portion 3b of the receiving base cloth 3 and the first base cloth 1 Side part 1c and receiving base cloth 3
1st side part 3c of this is joined by sewing machine sewing.
The rear side 2b of the second base cloth 2 and the upper side 3 of the receiving base cloth 3
a, the first side portion 2c of the second base cloth 2 and the second side portion 3d of the receiving base cloth 3 are joined by sewing. First
The second side portion 1d of the base cloth 1 and the second side portion 2 of the second base cloth 2
d, the front side 1a of the first base cloth 1 and the front side 2a of the second base cloth 2
And are joined by sewing. The front side portions 1a, 2a of the first and second base cloths 1, 2 and the first and second auxiliary base cloths 4,
The end portions 4a and 5a of 5 are joined by sewing.

After joining as described above, FIG.
As shown in (a) (b) to FIG. 3 (c), the first and second base cloths 1, 2 and the first and second auxiliary base cloths 4, 5 are 180 ° apart.
Invert. Thereby, the front side portions 1a and 2a of the first and second base cloths 1 and 2 and the end portions 4 of the first and second auxiliary base cloths 4 and 5 are formed.
a and 5a change from the outward direction (see FIG. 3 (a) and (b)) to the inward direction (see FIG. 3 (c)), and the first base cloth 1 and the first and second auxiliary base cloths 4, 5 The second base cloth 2 is positioned between and.

Next, as shown in FIGS. 3 (c) to 3 (d), the second base cloth 2, the first and second openings 1e of the first base cloth 1 are provided.
The auxiliary base cloths 4 and 5 are put in and the whole is turned over.
As a result, as shown in FIG. 4A, the first and second
Front side portions 1a, 2a, rear side portions 1b, 2b, first and second side side portions 1c, 2c, 1d, 2d of the base fabrics 1, 2, upper side portions 3a, lower side portions 3b, 3rd 1 and 2 side part 3
c, 3d, end portions 4a, 5 of the first and second auxiliary base fabrics 4, 5
a becomes inward.

[3] The airbag obtained as described in the above [1] and [2] is for a passenger seat, and as shown in FIG. Second auxiliary base cloth 4, 5
The inflator 6 and the upper holding plate 7 are inserted into the openings 1e, 4b, 5b of the first base cloth 1, the first and second auxiliary base cloths 4, 5 by the upper and lower holding plates 7, 8. Opening 1
Insert the peripheral parts of e, 4b, 5b and tighten them with bolts.

As a result, the inflator 6 is attached to the airbag, and the airbag and the inflator 6 are arranged inside the upper portion of the instrument panel 9 as shown in FIG. In this case, the inflator 6 is directed toward the upper side of the vehicle body or slightly obliquely rearward and toward the upper side of the vehicle body.
When the base cloth 2 is covered (see FIG. 4 (A)), the inflator 6 is attached to the front side portions 1a, 2 of the first and second base cloths 1, 2.
In the vicinity of a, the end portions 4a, 5 of the first and second auxiliary base fabrics 4, 5
It is located in the vicinity of a.

In the above state, when the air bag is inflated by the gas of the inflator 6, FIG. 4B and FIG.
As shown in (b), the gas of the inflator 6 flows toward the receiving base cloth 3 while lifting the second base cloth 2, and the first and second base cloths 1, 2 and the first and second auxiliary bases are formed. The cloths 4 and 5 are stretched to the rear of the vehicle body. The rear side portion 2b of the second base cloth 2 and the first auxiliary base cloth 4 are lifted, the upper side portion 3a of the receiving base cloth 3 is lifted, and the receiving base cloth 3 folded in two is extended above the vehicle body. It will be in a state where The vicinity of the first and second side portions 3c, 3d of the receiving base cloth 3 and the vicinity of the other side portion of the receiving base cloth 3 are bent toward the rear of the vehicle body, and the receiving base cloth 3 has a rectangular shape when viewed from an occupant.

In this case, when the gas of the inflator 6 flows toward the receiving base cloth 3, the first auxiliary base cloth 4 is positioned between the inflator 6 and the receiving base cloth 3 as shown in FIG. 4B. As a result, the gas of the inflator 6 is obstructed by the first auxiliary base cloth 4 and becomes difficult to flow to the central portion of the receiving base cloth 3, and the first and second side portions 3c, 3d of the receiving base cloth 3 are It becomes easier to flow to the other side portion. As a result, the expansion of the central portion of the receiving base fabric 3 tends to be delayed with respect to the expansion of the lateral side portions of the receiving base fabric 3, and the receiving base fabric 3
Is likely to be flat, and the state in which the central portion of the receiving base cloth 3 is rapidly expanded and the receiving base cloth 3 is spherical toward the occupant is suppressed.

As shown in FIGS. 1 and 4B, since the first and second auxiliary base cloths 4 and 5 are connected to the central portions of the upper side portion 3a and the lower side portion 3b of the receiving base cloth 3, The state in which the central portion of the receiving base cloth 3 is about to expand is suppressed, and the lateral side portion of the receiving base cloth 3 is in an easily expandable state. As a result, the state in which the central portion of the receiving base cloth 3 expands and the receiving base cloth 3 is spherical toward the occupant is suppressed, and the receiving base cloth 3 is likely to be flat.

[First Embodiment of the Invention] In the above-described [Embodiment of the Invention], when a plurality of airbags in a deployed state are integrally cut from one cloth body 10,
As shown in FIG. 6, the airbags are arranged alternately in opposite directions so that the first auxiliary base cloths 4 of the adjacent airbags are arranged side by side and the second auxiliary base cloths 5 of the adjacent airbags are arranged side by side. To do.

When constructed as described above, one cloth body 10 is formed.
In the above, the portion other than the airbag to be cut can be reduced and the yield can be improved. In this case, since the directions of the airbags cut into one fabric body 10 are opposite to each other, the directionality of the airbags with respect to one fabric body 10 becomes uniform, so that the performance of the airbags varies. Less sticky.

[Second Embodiment of the Invention] In the above-mentioned [Embodiment of the Invention] and [First Embodiment of the Invention],
In the airbag, the upper and lower sides 3 of the receiving base fabric 3
Although the first and second auxiliary base fabrics 4 and 5 are connected at right angles to a and 3b, the first and second auxiliary base fabrics 4 and 5 are connected to the upper and lower sides 3a and 3b of the receiving base fabric 3 as shown in FIG. 2 The auxiliary base fabrics 4 and 5 may be inclined and connected along the first and second base fabrics 1 and 2.

With the above construction, when a plurality of airbags in a deployed state as shown in FIG. 7 are integrally cut from one cloth body 10, the airbags are alternately turned in opposite directions. While lining up, the first of the adjacent air bags
Auxiliary base cloth 4 should be lined up, and the second airbag
When the auxiliary base fabrics 5 are arranged side by side, the airbags that are turned upside down can be approached in the vertical direction of the paper surface of FIG. 7.

As a result, [first alternative embodiment of the invention].
The width W of one cloth body 10 can be made smaller than that (see FIG. 6). In this case, similarly to [First Embodiment of the Invention], the directions of the airbags cut on one fabric body 10 are opposite to each other. Since the directionality is uniform, there is less variation in the performance of the airbag.

As described above, the first and second auxiliary base cloths 4 and 5 are inclined with respect to the upper and lower side portions 3a and 3b of the receiving base cloth 3 so as to be along the first and second base cloths 1 and 2. When configured so that they are connected to each other, as shown in FIGS. 2A and 2B, the first and second base cloths 1 and 2 are connected to the front side portions 1a and 2a
When joining the end portions 4a and 5a of the second auxiliary base cloths 4 and 5 by sewing with the sewing machine, the first and second auxiliary base cloths 4 and 5 connected to the upper and lower side portions 3a and 3b of the receiving base cloth 3. 8 may be bent obliquely with respect to the upper and lower sides 3a and 3b of the receiving base fabric 3 as shown in FIG.

[Third Embodiment of the Invention] In the above-mentioned [Embodiment of the Invention] and [First Embodiment of the Invention], the opening 1e of the first base cloth 1 (for mounting the inflator 6) 9) when the reinforcing base cloth 11 is provided in the vicinity of
It may be configured as shown in.

As shown in FIG. 9, in a state in which a plurality of airbags in a deployed state are integrally cut from one cloth body 10, the airbags are arranged adjacent to each other while the directions of the airbags are alternately reversed. When the first auxiliary base cloths 4 of the airbag are arranged side by side and the second auxiliary base cloths 5 of the adjacent airbags are arranged side by side, between the first and second base cloths 1 and 2 of the adjacent airbags. Reinforcement base cloth 1 with the portion as reinforcement base cloth 11
1 is cut while being connected to the first base cloth 1. As a result, as shown in FIGS. 10A and 10B, after the airbag is cut, the reinforcing base cloth 11 is folded back at the portion where the first base cloth 1 and the reinforcing base cloth 11 are connected to each other. 1 overlaid, 1st
The opening 11e of the reinforcing base cloth 11 is aligned with the opening 1e of the base cloth 1, and the reinforcing base cloth 11 is joined to the first base cloth 1 by sewing.

With this structure, when the reinforcing base cloth 11 is provided in the vicinity of the opening 1e of the first base cloth 1 in the air bag, the portion other than the air bag to be cut is reduced in one cloth body 10. Therefore, the yield can be improved. In this case, similarly to [First Embodiment of the Invention], the directions of the airbags cut on one fabric body 10 are opposite to each other. Since the directionality is uniform, there is less variation in the performance of the airbag.

[Fourth Embodiment of the Invention] In the above-described [Embodiment of the Invention] to [Third Embodiment of the Invention], the first and second auxiliary base cloths 4, 4 are formed on the receiving base cloth 3. 5 is integrally cut from one cloth body 10, but the first and second auxiliary base cloths 4 and 5 are cut separately from the receiving base cloth 3 to form the receiving base cloth 3. You may comprise so that the 1st and 2nd auxiliary | assistant base fabrics 4 and 5 may be joined to the center part of the upper and lower side parts 3a and 3b. In addition, without providing both the first and second auxiliary base fabrics 4 and 5, only the first auxiliary base fabric 4 is provided and the second auxiliary base fabric 5 is abolished, or the first auxiliary base fabric 4 is abolished. It is also possible to provide only the second auxiliary base cloth 5 or not include both the first and second auxiliary base cloths 1 and 2.

As a result, when a plurality of airbags in a deployed state are integrally cut from one cloth body 10, as shown in FIG. 11, the airbags are arranged alternately in opposite directions. It suffices that a portion of the single cloth body 10 other than the airbag to be cut is cut as a reinforcing base cloth or the like. With the above-described structure, the portion of the cloth body 10 other than the airbag to be cut can be reduced, and the yield can be improved. In this case, as in the case of the first alternative embodiment of the present invention, the directions of the airbags cut on one sheet of cloth 10 are merely opposite to each other, and one sheet of cloth 1
Since the directionality of the airbag with respect to 0 becomes uniform, variations in the performance of the airbag are reduced.

[Fifth Embodiment of the Invention] In the above-described [Embodiment of the Invention] to [Fourth Embodiment of the Invention], the sewing is performed by sewing. Various types of bonding can be adopted depending on the material of the airbag, such as bonding by sound waves and heat welding. As the material of the airbag, not only a woven fabric made of knitted synthetic fibers but also a resin sheet made up can be adopted. These are collectively referred to as the first and second base fabrics 1, 2, The receiving base cloth 3 and the first and second auxiliary base cloths 4 and 5 are used.

In the above-mentioned [Embodiment of the Invention] to [Fourth Embodiment of the Invention], the first and second auxiliary base fabrics are provided on the upper and lower sides 3a and 3b of the receiving base fabric 3. 4, 5 are located on the upper and lower sides 3a of the receiving base cloth 3,
In 3b, the first and second side portions 3c, 3d are offset from the first and second side portions, respectively.
The auxiliary base fabrics 4 and 5 may be located. The airbag of the present invention can be used not only for the passenger seat, but also for the driver's seat and for the rear seat.

[0049]

According to the features of claim 1 (claim 2),
When the airbag is inflated, the surface of the receiving base cloth that receives the occupant can be configured so that it tends to have a rectangular shape (for example, a rectangular shape) instead of a circular shape when viewed from the occupant. Since the inflated airbag can be made larger, the load when the occupant is received by the inflated airbag is dispersed without being concentrated on a part of the occupant.

According to the feature of claim 2, by providing the auxiliary base cloth, when the airbag is inflated, the central side of the receiving base cloth is inflated so that the receiving base cloth is spherical toward the occupant. It is possible to make it easier to make the surface of the receiving base fabric flat, and it is advantageous in that the load when receiving the occupant by the inflated airbag is dispersed without concentrating on a part of the occupant It became a thing.

According to the feature of claim 1 (claim 2), by appropriately setting the first and second base fabrics, the airbag is properly inflated in the desired direction, and the receiving base fabric when inflated. The position can be set to an appropriate position for the occupant, and it has become easy to manufacture airbags suitable for various vehicles.

According to the feature of claim 1 (claim 2), since there is no joint portion at the center of the upper part of the airbag (center of the second base cloth), the gas of the inflator flows into the airbag and the airbag is inflated. When the inflator expands, even if the inflator gas hits the center of the upper part of the airbag (center of the second base cloth) and is lifted, the inflator gas leaks at the joint part in the center of the upper part of the airbag. Since no situation occurs, it is possible to suppress the possibility that the inflation of the airbag will be delayed.

According to the second aspect of the present invention, when the above-mentioned auxiliary base cloth is provided, the overall joining length when the airbag is formed into a bag shape can be suppressed to a short one. As described above, the auxiliary base cloth can improve the performance of the airbag and reduce the production cost.

According to the feature of claim 3, as in the case of claim 2, the "effect of the invention" of the above-mentioned claim 2 is provided. In addition to the "effect of the invention", the following "invention" is provided. It has the effect of. According to the feature of claim 3, the attachment portions of the first base cloth and the auxiliary base cloth are attached to the inflator, the attachment strength of the airbag to the inflator can be made high, and the reliability of the operation of the airbag is ensured. Was able to increase.

According to the characteristics of claim 4 (claim 5), the same as in any one of claims 1 to 3 (similar to the case of claim 2 or 3), the above-mentioned claim 1 To 3 (claim 2 or 3), the "effect of the invention" is provided, and in addition to the "effect of the invention", the following "effect of the invention" is provided. According to the features of claim 4 (claim 5), the first base cloth, the second base cloth, and the receiving base cloth (and the auxiliary base cloth).
Since it is not necessary to separately prepare and join them by sewing with a sewing machine to obtain an airbag in a deployed state (state before joining), it is advantageous in terms of production cost reduction It became a thing.

[Brief description of drawings]

FIG. 1 is a plan view showing a state where an airbag is deployed (a state before joining).

FIG. 2 is a perspective view showing a state in which the first and second base cloths, the receiving base cloths, and the first and second auxiliary base cloths are superposed and joined from the state shown in FIG.

FIG. 3 shows a state in which the first and second base cloths and the first and second auxiliary base cloths are reversed by 180 ° from the state shown in FIG. 2, and the second base cloth, the first and second auxiliary cloths are provided in the openings of the first base cloth. Sectional view showing a state in which the base cloth is inserted and turned over

FIG. 4 shows a state in which an airbag is attached to the inflator,
And sectional view showing a state where the airbag is inflated

FIG. 5 is a side view of the vicinity of the instrument panel showing a state where the airbag is inflated.

FIG. 6 is a plan view showing a state in which only a plurality of airbags in a deployed state are integrally cut from one cloth body in the first another embodiment of the invention.

FIG. 7 is a plan view showing a state in which only a plurality of airbags in a deployed state are integrally cut from one cloth body in a second alternative embodiment of the invention.

FIG. 8 is a front view showing a state in which the first and second base cloths, the receiving base cloths, and the first and second auxiliary base cloths are overlapped and joined to each other in the second alternative embodiment of the invention.

FIG. 9 is a plan view showing a state in which only a plurality of airbags in a deployed state are integrally cut from a single fabric body in a third alternative embodiment of the invention.

FIG. 10 is a plan view showing a state in which a reinforcing base fabric is overlaid and joined to the first base fabric in the third alternative embodiment of the invention.

FIG. 11 is a plan view showing a state in which only a plurality of airbags in a deployed state are integrally cut from one cloth body in a fourth another embodiment of the invention.

[Explanation of symbols]

1st base cloth 1a Front part of the first base cloth 1b Rear part of the first base cloth 1c, 1d Side part of the first base cloth e Mounting part of the first base cloth 2 Second base cloth 2a Front side of the second base cloth 2b Rear part of the second base cloth 2c, 2d Side part of the second base cloth 3 receiving base cloth 3a Upper side of receiving base cloth 3b Lower side of receiving base cloth 3c, 3d Side portions of the receiving base cloth 4,5 auxiliary fabric 4b, 5b Auxiliary base cloth attachment part 6 inflator

Claims (5)

[Claims] 1. A front side portion corresponding to the front side of the vehicle body when inflated, a rear side portion corresponding to the rear side of the vehicle body when inflated, and one and the other of which correspond to the right side and the left side of the vehicle body when inflated. A first base cloth having a side portion and an inflator mounting portion, a front side portion corresponding to a front side of the vehicle body when inflated, a rear side portion corresponding to a rear side of the vehicle body when inflated, and a vehicle body when inflated A second base fabric having one and the other side portions corresponding to the right side and the left side, an upper side portion corresponding to the upper side of the vehicle body when inflated, and a lower side portion corresponding to the lower side of the vehicle body when inflated An occupant receiving base cloth having one side and the other side corresponding to the right and left sides of the vehicle body when inflated, and connecting one side of the first and second base cloths. The one side portion of the receiving base cloth is connected to the side portions of the first and second base cloths, and the rear side portion of the first base cloth and the receiving side cloth are connected to each other. The lower side of the base cloth can be joined, the rear side of the second base cloth and the upper side of the receiving base cloth can be joined, and the other side of the first, second and receiving base cloths can be connected. An airbag that can be joined. 2. A front side portion corresponding to the front side of the vehicle body when inflated, a rear side portion corresponding to the rear side of the vehicle body when inflated, and one and the other of which correspond to the right side and the left side of the vehicle body when inflated. A first base cloth having a side portion and an inflator mounting portion, a front side portion corresponding to a front side of the vehicle body when inflated, a rear side portion corresponding to a rear side of the vehicle body when inflated, and a vehicle body when inflated A second base fabric having one and the other side portions corresponding to the right side and the left side, an upper side portion corresponding to the upper side of the vehicle body when inflated, and a lower side portion corresponding to the lower side of the vehicle body when inflated An occupant receiving base cloth having one side and the other side corresponding to the right and left sides of the vehicle body when inflated, and connecting one side of the first and second base cloths. Then, one side of the receiving base cloth is connected to the side of the first and second base cloths to supplement the upper side or the lower side of the receiving base cloth. While connecting the auxiliary base cloth, the rear side of the first base cloth and the lower side of the receiving base cloth can be joined together, and the rear side of the second base cloth and the upper side of the receiving base cloth can be joined together. Yes, the first side, the second side, and the other side of the receiving base cloth can be joined, and the front side of the first and second base cloth and the end of the auxiliary base cloth can be joined. An airbag. 3. The airbag according to claim 2, wherein the auxiliary base cloth is provided with a mounting portion that is mounted on the inflator together with the mounting portion of the first base cloth. 4. The first base cloth, the second base cloth, and the receiving base cloth are integrally formed of one cloth body.
The airbag according to any one of 3. 5. The airbag according to claim 2, wherein the first base cloth, the second base cloth, the receiving base cloth, and the auxiliary base cloth are integrally formed by one cloth body.