JP2015202856A - Hollow weave air bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hollow weave air bag configured so that a small hole is not generated on a surface of the hollow weave air bag even by rupture of a joined yarn during impact absorption.SOLUTION: The hollow weave air bag comprises a bag part 10 which is inflated by gas inflow and a closing part 20 closing the bag part at an outer periphery of the bag part 10. The bag part 10 has double woven parts 11 woven into two separable layers and a quadruply woven part 12 woven into four separable layers. The double woven parts 11 have LA layers and LB layers as fabric layers, and the quadruply woven part 12 has a LAlayer and LAlayer woven further into double layers using yarn constituting the LA layers and a LBlayer and LBlayer woven further into double layers using yarn constituting the LB layers. The quadruply woven part 12 has the LAlayer, the LAlayer, the LBlayer and the LBlayer provided in this order and has a connection part at which the LAlayer and the LBlayer are joined.

Description

  The present invention relates to a bag-woven airbag, and more particularly, to a bag-woven airbag that is formed by a bag-woven structure and that mitigates the impact on the object to be protected by inflation.

2. Description of the Related Art Conventionally, an airbag that is inflated with gas and is interposed between an occupant and a vehicle body at the time of a collision and the like to protect the occupant is known. This type of airbag is normally stored in a small fold and is instantly deployed and inflated when necessary. Therefore, during deployment and expansion, a high pressure gas is formed and ejected by an inflator, and the gas is introduced into the airbag. The airbag is required to have a structure that can withstand the high-pressure gas and is not damaged.
As countermeasures against the impact pressure caused by gas when such an airbag is deployed and inflated, techniques of Patent Document 1 and Patent Document 2 below are known.

JP 2009-073219 A JP 2001-106006 A

In the above-mentioned Patent Document 1, in a bag-woven airbag comprising: a bag portion that is expanded and inflated by a jet gas from an inflator; and a partition portion that partitions the bag portion and restricts the shape and thickness at the time of inflation. There is disclosed a bag-woven airbag in which a surface layer and a back layer of a bag part are bound by a binding yarn in the vicinity. In this bag-woven airbag, it is shown that the impact energy due to the jet gas can be absorbed by breaking the binding yarn.
On the other hand, in Patent Document 2, two opposing fabric layers are integrally woven with at least one warp and / or weft to form a sacrificial yarn in which the yarn breaks in an object-constrained state. A woven airbag is disclosed. Even in this bag-woven airbag, it has been shown that the sacrificial yarn can be broken when the pressure in the airbag increases, allowing the gas to overflow into the adjacent chamber.
These airbags are designed so that layers opposed to each other by bag weaving can be bound with a binding yarn, and the binding yarn can be broken when necessary to perform impact absorption. However, in all of these airbags, since the original yarn (component yarn) of each layer is used as the binding yarn, a small hole is generated on the surface of the airbag when the binding yarn is broken by the impact absorption. There is a problem of end up.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a bag-woven airbag that does not generate a small hole on the surface of the bag-woven airbag even when the binding yarn breaks during shock absorption.

In order to solve the above problems, the bag-woven airbag according to claim 1 includes a bag portion that is inflated by gas inflow, and a closed portion that closes the bag portion on the outer periphery of the bag portion,
The bag portion includes a double woven portion woven into two layers that can be separated, and a four woven portion woven into four layers that can be separated.
The double woven portion has an LA layer and an LB layer which are woven layers,
The quadruple woven portion includes an LA1 layer and an LA2 layer woven into two layers using the constituent yarns of the LA layer, and an LB1 layer and an LB2 layer woven into two layers using the constituent yarns of the LB layer. And having
The quadruple woven portion includes the LA1 layer, the LA2 layer, the LB2 layer, and the LB1 layer in this order, and has a connecting portion in which the LA2 layer and the LB2 layer are connected. To do.
The bag woven airbag according to claim 2 is characterized in that, in the bag woven airbag according to claim 1, the double woven portion is surrounded by the double woven portion around the entire circumference.
The bag woven airbag according to claim 3 is the bag woven airbag according to claim 2, characterized in that the quadruple woven portion is arranged along the closed portion.
The bag woven airbag according to claim 4 is the bag woven airbag according to any one of claims 1 to 3, wherein the connecting portion is one of constituent yarns constituting the LA ₂ layer. Alternatively, the gist is that one or two of the constituent yarns constituting the LB ₂ layer are interwoven.
The bag woven airbag according to claim 5 is the curtain woven airbag according to any one of claims 1 to 4, wherein the bag woven airbag is a curtain shield airbag.

In the bag-woven airbag according to claim 1, the bag portion has a double woven portion and a quadruple woven portion. The double woven portion has an LA layer and an LB layer as a fabric layer. The quadruple woven portion has an LA ₁ layer and an LA ₂ layer in which the LA layer is further woven into two layers, and an LB ₁ layer and an LB ₂ layer in which the LB layer is further woven into _two layers. Yes. Further, the LA ₁ layer, the LA ₂ layer, the LB ₂ layer, and the LB ₁ layer are provided in this order, and have a connection portion where the LA ₂ layer and the LB ₂ layer are connected.
With this configuration, only the inner two layers of the four layers arranged in the order of LA ₁ layer, LA ₂ layer, LB ₂ layer, and LB ₁ layer can be connected. Therefore, even when the connecting portion is broken, the influence can be kept on the inner two layers, and the outer layer LA ₁ layer and LB ₁ layer are not affected. it can. That is, for example, even if a small hole is formed in the LA ₂ layer and / or LB ₂ layer which is the inner layer due to breakage, a small hole is formed in the LA ₁ layer and LB ₁ layer constituting the surface layer of the bag-woven airbag. It does not occur.

The bag-woven airbag according to claim 2 has a configuration in which the entire circumference of the quadruple woven portion is surrounded by the double woven portion.
With this configuration, the airtightness of the bag portion other than the connecting portion can be maintained high. In addition, since the closed portion is normally formed in a single weave, the tissue can be arranged by interposing the double weave without interposing the single weave and the quadruple weave. Thereby, the strength of the tissue in the vicinity of the boundary between the closed portion and the bag portion can be maintained high.

The bag-woven airbag according to claim 3 has a configuration in which the four-woven portion is arranged along the closed portion in addition to the configuration in which the entire circumference of the four-woven portion is surrounded by the double-woven portion. .
With this configuration, it is possible to effectively absorb an impact on the vicinity of the boundary between the closed portion and the bag portion. That is, since the small holes due to breakage at the time of impact absorption are not generated by connecting with the quadruple woven portion, the connecting portion can be disposed in the vicinity of the closed portion. In addition, since the entire circumference of the quadruple woven part is surrounded by the double woven part, the closed part and the connecting part are prevented from becoming adjacent structures, and the closed part and the bag part are doubled. The cloth is separated by the woven portion, and the strength of the cloth in the vicinity of the boundary between the closed portion and the bag portion can be maintained high.

In the bag-woven airbag according to claim 4, one or two of the constituent yarns in which the connecting portion constitutes the LA ₂ layer is one or two of the constituent yarns in which the LB ₂ layer is constituted. It is the composition which weaved. In other words, the structure is connected by any one of one 1/1 organization, one 1/2 organization, one 2/1 organization, and one 2/2 organization.
With this configuration, it is possible to obtain a more appropriate bonding strength, and it is possible to form a suitable structure that is not easily broken and is not easily broken.

The present invention will be further described in the following detailed description with reference to the drawings referred to, with reference to non-limiting examples of exemplary embodiments according to the present invention. Similar parts are shown through several figures.
It is explanatory drawing which shows the cross section of an example of this bag-woven airbag typically. It is explanatory drawing which shows typically the planar shape of an example of this bag-woven airbag. It is explanatory drawing which shows an example of the positional relationship of a double woven part and a quadruple woven part. It is explanatory drawing which shows the other examples of the positional relationship of a double woven part and a quadruple woven part. It is explanatory drawing explaining an example of a connection part. It is explanatory drawing explaining the variation of a connection part. It is explanatory drawing explaining the variation of a connection part. It is explanatory drawing explaining the variation of a connection part.

  The items shown here are exemplary and illustrative of the embodiments of the present invention, and are the most effective and easy-to-understand explanations of the principles and conceptual features of the present invention. It is stated for the purpose of providing what seems to be. In this respect, it is not intended to illustrate the structural details of the present invention beyond what is necessary for a fundamental understanding of the present invention. It will be clear to those skilled in the art how it is actually implemented.

[1] Bag Woven Airbag The bag woven airbag (1) of the present invention includes a bag portion (10) that is inflated by gas inflow, and a closed portion that closes the bag portion (10) on the outer periphery of the bag portion (10) ( 20). Furthermore, the bag part (10) has a double woven part (11) woven into two layers that can be separated and a four woven part (12) woven into four layers that can be separated. The double woven portion (11) has an LA layer (LA) and an LB layer (LB) which are fabric layers. In addition, the quadruple woven portion (12) includes LA ₁ layer (LA ₁ ) and LA ₂ layer (LA ₂ ), and LB layer (LB) further woven into two layers using the constituent yarns of the LA layer (LA). LB ₁ layer (LB ₁ ) and LB ₂ layer (LB ₂ ) which are further woven into two layers using the constituent yarns. The quadruple woven portion (12) includes an LA ₁ layer (LA ₁ ), an LA ₂ layer (LA ₂ ), an LB ₂ layer (LB ₂ ), and an LB ₁ layer (LB ₁ ) in this order, and an LA ₂ layer (LA ₂ ) and the LB ₂ layer (LB ₂ ) are connected to each other (30).

  The “bag part (10)” is a part that is expanded by the inflow of gas. Normally, the gas generated by the inflator is expanded by being filled inside. Further, since the bag-woven airbag is usually stored in a folded state, it is deployed while being inflated as the gas flows in. And the cushioning effect | action to a protection object by the passenger | crew etc. which the expanded bag part 10 is protection object, and the protection object (for example, passenger | crew) interposed between collision objects (for example, inner wall of a motor vehicle) Can be demonstrated.

The bag portion 10 includes a double woven portion 11 and a quadruple woven portion 12. Accordingly, the bag portion 10 includes at least two or more separable fabric layers on the entire surface thereof. That is, the double woven portion 11 includes two layers of an LA layer and an LB layer, and the quadruple woven portion 12 includes four layers of an LA ₁ layer and an LA ₂ layer, and an LB ₁ layer and an LB ₂ layer. . And in the double woven part 11, the bag part 10 is expanded when gas enters between the layers of the LA layer and the LB layer. In the quadruple woven portion 12, gas may flow between any layers, but normally, the bag portion 10 is inflated when gas enters between the LA ₂ layer and the LB ₂ layer.

The LA ₁ layer and the LA ₂ layer in the quadruple woven portion 12 are formed using the LA layer of the double woven portion 11.
Here, regarding the warp that constitutes the LA layer, LA ₁ layer, and LA ₂ layer, how many of the LA layer warps are distributed to the LA ₁ layer warp, and how many are distributed to the LA ₂ layer warp May be. That is, the number of warps in the LA ₁ layer and the LA ₂ layer may be the same or different.
When the number of warps is the same, LA ₁ layer warp number: LA ₂ layer warp number = 1: 1, so 1/2 of LA layer warp (usually 3 or more) is distributed to LA ₁ layer warp. The other half of the LA layer warp (usually 3 or more) can be distributed to the LA _two layer warp.
When the number of warps is different, LA ₁ layer warp number: LA ₂ layer warp number = 4: 3, LA ₁ layer warp number: LA ₂ layer warp number = 5: 3, LA ₁ layer warp number: LA ₂ layer warp Number = 6: 3 or the like. These structures may use only 1 type and may use 2 or more types together.

Similarly, for the wefts constituting the LA layer, LA ₁ layer and LA ₂ layer, any number of LA layer wefts can be distributed to LA ₁ layer wefts, and how many can be distributed to LA ₂ layer wefts. Good. That is, the number of wefts in the LA ₁ layer and the LA ₂ layer may be the same or different.
When the number of wefts is the same, LA _1- layer weft number: LA _2- layer weft number = 1: 1, so 1/2 of LA layer wefts (usually 3 or more) are distributed to LA _1- layer wefts. The other half (usually 3 or more) of LA layer wefts can be distributed to LA ₂ layer wefts.
When the number of wefts is different, LA _1- layer weft number: LA _2- layer weft number = 4: 3, LA _1- layer weft number: LA _2- layer weft number = 5: 3, LA _1- layer weft number: LA _2- layer weft Number = 6: 3 or the like. These structures may use only 1 type and may use 2 or more types together.

Further, the same applies to the LB layer of the double woven portion 11 and the LB ₁ layer and LB ₂ layer of the quadruple woven portion, and the LB ₁ layer and the LB ₂ layer are formed using the LB layer.
Here, regarding the warp constituting the LB layer, the LB ₁ layer and the LB ₂ layer, how many of the LB layer warps are distributed to the LB ₁ layer warp, and how many are distributed to the LB ₂ layer warp. May be. That is, the number of warps of the LB ₁ layer and the LB ₂ layer may be the same or different.
When the number of warps is the same, LB ₁ layer warp number: LB ₂ layer warp number = 1: 1, so 1/2 of LB layer warp (usually 3 or more) is distributed to LB ₁ layer warp The other half (usually three or more) of the LB layer warp can be distributed to the LB _two layer warp.
When the number of warps is different, LB ₁ layer warp number: LB ₂ layer warp number = 4: 3, LB ₁ layer warp number: LB ₂ layer warp number = 5: 3, LB ₁ layer warp number: LB ₂ layer warp Number = 6: 3 or the like. These structures may use only 1 type and may use 2 or more types together.

Similarly, for the wefts constituting the LB layer, the LB ₁ layer, and the LB ₂ layer, no matter how many of the LB layer wefts are allocated to the LB ₁ layer weft, and how many are allocated to the LB ₂ layer wefts. Good. That is, the number of wefts in the LB ₁ layer and the LB ₂ layer may be the same or different.
When the number of wefts is the same, LB _1- layer weft number: LB _2- layer weft number = 1: 1, so 1/2 of LB layer wefts (usually 3 or more) are distributed to LB _1- layer wefts. The other half (usually 3 or more) of the LB layer wefts can be distributed to the LB _two- layer wefts.
When the number of wefts is different, LB _1- layer weft number: LB _2- layer weft number = 4: 3, LB _1- layer weft number: LB _2- layer weft number = 5: 3, LB _1- layer weft number: LB _2- layer weft Number = 6: 3 or the like. These structures may use only 1 type and may use 2 or more types together.

Further, usually, there are three or more warps and wefts in each of the LA ₂ layer and LB ₂ layer forming the quadruple woven portion 12. That is, there are three or more LA _two- layer warps, LA _two- layer wefts, LB _two- layer warps, and LB _two- layer wefts. By using three or more layers, the LA ₂ layer and the LB ₂ layer can be connected to each other by using these constituent yarns as binding yarns.
The number of yarns (the number of each of the LA ₂ layer warp, LA ₂ layer weft, LB ₂ layer warp, and LB ₂ layer weft) is 3 or more, and usually 18 or less. Furthermore, 3 or more and 12 or less are preferable, and 3 or more and 6 or less are more preferable.
The number of LA _two- layer warp yarns and LA _two- layer weft yarns may be different but are preferably the same. Similarly, the number of LB _two- layer warps and LB _two- layer wefts may be different, but is preferably the same.

Further, the LA ₂ layer and the LB ₂ layer constituting the quadruple woven portion 12 are connected, and the main bag woven airbag 1 has a connecting portion 30 in the quadruple woven portion 12.
Binding yarn 31 to knotting and LA ₂ layer and LB ₂ layer may be a yarn constituting the LA ₂ layer or LB ₂ layer, it may be a yarn the other, in the present invention LA _The constituent yarns constituting the _two layers or the LB _two layers are preferable. By using the constituent yarn constituting the LA ₂ layer or the LB ₂ layer as the binding yarn 31, the complexity in the production process can be reduced, and the main bag woven airbag can be produced more easily.
As the binding yarn 31, any one of LA _two- layer warp, LA _two- layer weft, LB _two- layer warp, and LB _two- layer weft may be used. For example, when the LA ₂ layer warp (LA ₂ layer warp) is used as the binding yarn 31, the LB ₂ layer weft (LB ₂ layer weft) can be connected to form the connecting portion 30. Similarly, when the LA ₂ layer weft (LA ₂ layer weft) is used as the binding yarn 31, the LB ₂ layer warp (LB ₂ layer warp) can be connected to form the connecting portion 30.

Although the structure structure of the other connection part 30 is not specifically limited, In this bag-woven airbag 1, one or two of the constituent yarns constituting the LA ₂ layer are the constituent yarns constituting the LB ₂ layer. It is preferable to woven one or two of these.
Specifically, a form in which one LB _two- layer weft and one LA _two- layer warp are connected (see FIG. 5), one LB _two- layer weft and _two LA _two- layer warps are connected. (See FIG. 6), _two LB _two- layer wefts and one LA _two- layer warp (see FIG. 7), _two LB _two- layer wefts and two LA _two- layer warps Form of connection (see FIG. 8), form of LB ₂ layer warp and 1 LA ₂ layer weft, connection of 1 LB ₂ layer warp and ₂ LA ₂ layer weft A form in which _two LB _two- layer warps and one LA _two- layer weft are joined, and a form in which _two LB _two- layer warps and two LA _two- layer wefts are joined.
Among these, the connecting portion 30 in which one constituent yarn of the LB _two layers and one constituent yarn of the LA _two layers are connected is particularly preferable. That is, it is preferable when one LB _two- layer warp and one LB _two- layer weft are bound, or when one LB _two- layer weft and one LB _two- layer warp are bound. .

Further, two or more connecting portions 30 may be included in one quadruple woven portion 12, but it is preferable that only one location is provided. That is, it is preferable that only one connecting portion 30 is included in one quadruple woven portion 12.
More specifically, even if the number of the connecting portions 30 existing per total constituent yarn constituting the quadruple woven portion 12 is the same, only one portion is provided for one quadruple woven portion having a smaller constituent yarn number. It is preferable to have the connecting part 30.
For example, the quadruple weave portion 12 is formed from a total of twelve constituent yarns of three LA _two- layer warps, three LA _two- layer wefts, three LB _two- layer warps, and three LB _two- layer wefts. In the case where the quadruple woven portion 12 is provided with only one connecting portion 30, the structure is “one connecting portion / twelve structure yarns”. Similarly, the number of connecting portions relative to the number of constituent yarns is the same even in the “structure of two connecting portions / 24 constituent yarns”. However, in the main bag woven airbag 1, it is preferably “a structure consisting of one connecting portion / 12 constituent yarns” rather than “a structure consisting of two connecting portions / 24 constituent yarns”. .

In addition, it is preferable that the quadruple woven part 12 is surrounded by the double woven part 11 on the entire circumference (see FIG. 3). That is, for example, the quadruple woven portion 12 may be adjacent to the closed portion 20 without using the double woven portion 11 (see FIG. 4), but the quadruple woven portion 12 is closed via the double woven portion 11. (See FIG. 3).
When the entire circumference of the quadruple woven part 12 is surrounded by the double woven part 11, it may be surrounded to any extent, but specifically, the double woven part 11 containing two or more warps, or It is preferably surrounded by a double woven portion 11 including two or more wefts. The number of warp yarns or weft yarns of the double woven portion 11 surrounding the four woven portion 12 is not particularly limited, but is preferably 2 or more, more preferably 3 or more as described above.

Further, the quadruple woven portion 12 may be disposed at any position in the bag portion 10 of the bag woven airbag 1, but is preferably disposed along the closed portion 20 (see FIG. 2). ). In the case of being arranged along the closed portion 20, the impact applied to the closed portion 20 can be reduced by breaking the connecting portion 30 in the quadruple woven portion 12.
Further, when the quadruple woven portion 12 is disposed along the closed portion 20, the quadruple woven portion 12 and the closed portion 20 are preferably disposed via the double woven portion 11 as described above. (See FIG. 3). When the double woven portion 11 is provided between the quadruple woven portion 12 and the closed portion 20, the double woven portion 11 including two or more warps or the double woven portion 11 including two or more wefts is provided. It is preferable to interpose between the heavy weave portion 12 and the closed portion 20. The number of warp yarns or weft yarns of the double woven portion 11 interposed between the quadruple woven portion 12 and the closed portion 20 is not particularly limited, but is preferably 3 or more.

The “closed portion (20)” is a portion that is adjacent to the outer periphery of the bag portion 10 and closes the bag portion 10. Usually, it is a woven portion in which all constituent yarns are woven into one layer. Examples of the woven structure include plain weave, twill weave and satin weave. These woven structures may use only 1 type and may use 2 or more types together. More specifically, for example, 1/1 plain weave texture, 2/2 plain weave texture, 3/3 plain weave texture, 4/4 plain weave texture, 2/1 twill texture, 2/2 twill texture, 2/3 twill texture, Examples of the woven structure include a 3/3 twill weave structure, a 3/4 twill weave structure, and a 4/4 twill weave structure. These woven structures may use only 1 type and may use 2 or more types together.
Moreover, the kind of thread | yarn utilized for the closed part 20 is not specifically limited, Naturally, the thread | yarn quoted in description of the above-mentioned bag part 10 can be utilized.
The width of the closed portion 20 is not particularly limited, but it is usually preferable that the width includes 2 to 30 constituent yarns in either the warp or the weft direction in a direction away from the double woven portion 11. Further, the width is more preferably 3 to 20, and particularly preferably 4 to 15.

  The kind of thread | yarn utilized for this bag-woven airbag 1 is not specifically limited, Each suitable thread | yarn can be used. Although the material which comprises a thread | yarn is not limited, Usually, a synthetic resin fiber is used. Synthetic resins constituting the synthetic resin fiber include polyamide resins such as nylon 6 and nylon 66, polyester resins such as polyethylene terephthalate, polybutylene terephthalate and polytrimethylene terephthalate, polyolefin resins such as polyacrylic resin and polypropylene. Etc. These may use only 1 type and may use 2 or more types together. Of these, polyamide resins and polyester resins are particularly preferable, and polyamide resins are more preferable.

Further, the fineness of the yarn is not particularly limited, but a yarn of 235 to 700 dtex is preferable, and a yarn of 350 to 470 dtex is preferable.
The yarn may be a multifilament, a monofilament, or a combination thereof. Of these, multifilament is preferred.
When using a multifilament, the number of constituent filaments constituting the multifilament is not limited and can be appropriately set depending on the fineness and the like, preferably 10 to 500, more preferably 30 to 250, and particularly preferably 70 to 150. .
Further, when a multifilament is used, a modified cross-section yarn (for example, a triangular cross section, a hexagonal step surface, etc.) can be used as the constituent filament. When a modified cross-section yarn is used, the gap between constituent filaments can be reduced.

  In the bag-woven airbag 1, at least a part (or the entire surface) of the outer surface of the bag portion 10 can be coated with a resin. Similarly, at least a part (or the entire surface) of the closed portion 20 can be coated with a resin. The type of resin used for coating is not particularly limited, but a silicone resin is preferable from the viewpoints of airtightness, permeability, flexibility, fire resistance, heat resistance, and the like.

  The main bag woven airbag 1 can be used as an airbag for various applications. That is, in various vehicles, the vehicle is stored around the occupant, and when a vehicle or the like collides, the vehicle is inflated and expanded by the gas supplied from the inflator, and is interposed in the gap between the occupant and the component member such as the vehicle. Can be used. Specific examples include curtain shield airbags, driver seat airbags, passenger seat airbags, side airbags, knee airbags, and ITS head airbags. Among these, the main bag woven airbag 1 is particularly suitable as a curtain shield airbag.

Hereinafter, the present invention will be described specifically by way of examples.
(1) Production of bag-woven airbag Using a multifilament having a fineness of 555 dtex composed of 182 filaments made of polyester, a curtain shield airbag 1 having a rectangular planar shape was manufactured as shown in FIG. The product dimensions are 1800 mm in the horizontal direction and 400 mm in the vertical direction (not including convex portions such as the gas inlet 15).

As shown in FIG. 1, the bag-woven airbag 1 is arranged in the order of a closing portion 20 and a bag portion 10 from the end side toward the center side (from the left side to the right side in FIG. 1) (see FIG. 1). 1 corresponds to AA ′ in FIG. 2).
Of these, the closed portion 20 is formed of a 3/3 plain weave structure.
Moreover, the bag part 10 has the double woven part 11 woven by the LA layer and LB layer which are 2 layers which can be separated, and the LA ₁ layer, LA ₂ layer, LB ₂ layer and LB ₁ which are 4 layers which can be separated. A quadruple woven portion 12 woven into layers.
As shown in FIG. 1, the double woven portion 11 and the quadruple woven portion 12 are disposed between the closed portion 20 and the quadruple woven portion 12 with the double woven portion 11 interposed therebetween. The double woven portion 11 interposed between the closed portion 20 and the quadruple woven portion 12 is formed into a 1/1 plain weave structure using six warps (three LA layers and three LB layers).

Further, as shown in FIG. 1, the quadruple weave portion 12 has an LA ₁ layer, an LA ₂ layer, an LB ₂ layer, and an LB from the front side to the back side (from the upper side to the lower side in FIG. 1). It is formed in the order of _one layer. Further, the quadruple weave portion 12 includes 12 warps (3 LA ₁ layers, 3 LA ₂ layers, 3 LB ₂ layers and 3 LB ₁ layers), 12 wefts (3 LA ₁ layers, LA _2). 3 layers, 3 LB ₂ layers, and 3 LB ₁ layers), each having a 1/1 plain weave structure.
That is, the quadruple woven portion 12 is surrounded by the double woven portion 11 as shown in FIG. Further, as shown in FIG. 2, the quadruple woven portion 12 is disposed along the closed portion 20, and a plurality thereof are disposed.

  Further, as shown in FIG. 1, the double woven portion disposed on the central side of the bag portion 10 with respect to the quadruple woven portion 12 from the end side toward the central side (from the left side to the right side in FIG. 1). 11 is formed of a 1/1 plain weave structure.

And the quadruple woven part 12 of this bag-woven airbag 1 has the connection part 30 as shown in FIG. The binding portion 30 is composed of one LB _two- layer weft (constituent yarn) of the quadruple woven portion 12 and one LA _two- layer warp (constituent yarn) of the quadruple woven portion 12 as a binding yarn 31. / 1.
Furthermore, the entire outer surface of the bag-woven airbag 1 is coated with a silicone resin.

The bag-woven airbag 1 has only the _two inner layers (LA ₂ layer and LB ₂ layer) arranged in the order of LA ₁ layer, LA ₂ layer, LB ₂ layer, and LB ₁ layer in the above-described configuration. The connecting portion 30 is formed by connecting. For this reason, even when the binding yarn 31 of the binding portion 30 is broken, the influence can be kept on the inner two layers (LA ₂ layer and LB ₂ layer), and LA ₁ which is the outer layer. The layer and the LB ₁ layer are not affected. That is, when the binding yarn 31 is broken, even if a small hole is formed in the LA ₂ layer and / or the LB ₂ layer as the inner layer, the LA ₁ layer constituting the surface layer of the bag-woven airbag 1 In addition, small holes are not generated in the LB ₁ layer.

  Further, the bag-woven airbag 1 has a configuration in which the entire circumference of the quadruple woven portion 12 is surrounded by the double woven portion 11. Therefore, the airtightness of the bag part 10 other than the connecting part 30 can be maintained high. In addition, since the closed portion 10 is formed in a single weave, the double weave structure (double weave portion) is formed without adjoining the single weave structure (closed portion 20) and the quadruple weave structure (four double weave portion 12). 11) can be used to interpose the tissue. Thereby, the strength of the tissue near the boundary between the closed portion 20 and the bag portion 10 can be maintained high.

  In addition to the configuration in which the entire circumference of the quadruple woven portion 12 is surrounded by the double woven portion 11, the bag woven airbag 1 has a configuration in which the quadruple woven portion 12 is arranged along the closed portion 20. Yes. With this configuration, it is possible to effectively absorb an impact on the vicinity of the boundary between the closed portion 20 and the bag portion 10. That is, by connecting with the quadruple woven portion 12, a small hole due to fracture at the time of impact absorption is not generated, so that the connecting portion 30 can be disposed in the vicinity of the closed portion 20. And since it is the structure by which the perimeter of the quadruple woven part 12 was enclosed by the double woven part 11, it prevents that the closed part 20 and the connection part 30 become a structure | tissue which adjoined, and the closed part 20 and a bag By separating the part 10 from the double woven part 11, the strength of the cloth in the vicinity of the boundary between the closed part 20 and the bag part 10 can be maintained high.

Further, the bag-woven airbag 1 has a configuration in which the connecting portion 30 is connected to one of the constituent yarns constituting the LA ₂ layer and one of the constituent yarns constituting the LB ₂ layer. It has become. That is, it has a configuration in which one 1/1 structure is formed and connected. With this configuration, it is possible to obtain a more appropriate bonding strength, and it is possible to form a suitable structure that is not easily broken and is not easily broken.

  The foregoing examples are for illustrative purposes only and are not to be construed as limiting the invention. Although the invention has been described with reference to exemplary embodiments, it is to be understood that the language used in the description and illustration of the invention is illustrative and exemplary rather than limiting. As detailed herein, changes may be made in its form within the scope of the appended claims without departing from the scope or spirit of the invention. Although specific structures, materials and examples have been referred to in the detailed description of the invention herein, it is not intended to limit the invention to the disclosure herein, but rather, the invention is claimed. It covers all functionally equivalent structures, methods and uses within the scope.

  The present invention is widely used in the technical field of airbags. In particular, it can be used as an airbag in various vehicles, and is particularly preferably used as a curtain shield airbag for automobiles.

1; bag-woven airbag (curtain shield airbag),
10; bag part, 11; double woven part, 12; quadruple woven part, 15; gas inlet,
20; closed part,
30; binding portion, 31; binding yarn,
LA; LA layer, LA ₁ ; LA ₁ layer, LA ₂ ; LA ₂ layer,
LB; LB layer, LB ₁ ; LB ₁ layer, LB ₂ ; LB ₂ layer,
Warp; 41, weft; 42.

Claims (5)

A bag portion that is inflated by gas inflow, and a closed portion that closes the bag portion on the outer periphery of the bag portion,
The bag portion includes a double woven portion woven into two layers that can be separated, and a four woven portion woven into four layers that can be separated.
The double woven portion has an LA layer and an LB layer which are woven layers,
The quadruple woven portion includes an LA ₁ layer and an LA ₂ layer woven into two layers using the constituent yarns of the LA layer, and an LB _one layer woven into two layers using the constituent yarns of the LB layer. And LB ₂ layers,
The quadruple woven portion includes the LA ₁ layer, the LA ₂ layer, the LB ₂ layer, and the LB ₁ layer in this order, and the connecting portion in which the LA ₂ layer and the LB ₂ layer are connected. A bag-woven airbag, comprising:   The bag-woven airbag according to claim 1, wherein the four-fold woven portion is surrounded by the double-woven portion around the entire circumference.   The bag-woven airbag according to claim 2, wherein the quadruple woven portion is disposed along the closed portion. 2. The connecting portion is formed by weaving one or two of the constituent yarns constituting the LA ₂ layer into one or two of the constituent yarns constituting the LB ₂ layer. The bag-woven airbag according to any one of 1 to 3.   The bag-woven airbag according to any one of claims 1 to 4, which is a curtain shield airbag.

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