WO2012176733A1

WO2012176733A1 - Airbag device

Info

Publication number: WO2012176733A1
Application number: PCT/JP2012/065504
Authority: WO
Inventors: 雄太南; 美和松岡; 了悟本田
Original assignee: 芦森工業株式会社
Priority date: 2011-06-24
Filing date: 2012-06-18
Publication date: 2012-12-27
Also published as: JP2013006540A

Abstract

This airbag device reduces the time and steps involved in sewing a fixed cloth of the airbag device while increasing the strength of the fixed cloth. This airbag device (20) has a fixed cloth (30) fixed to the vehicle body. The fixed cloth (30) is provided with a main body cloth (34), a reinforcing cloth (40), an attaching sewn portion (37), and a reinforcing sewn portion (38). The main body cloth (34) is integrally formed with the airbag device (20), and the reinforcing cloth (40) is sewn overlapping the main body cloth (34). The attaching sewn portion (37) attaches the reinforcing cloth (40) to the main body cloth (34), and the reinforcing sewn portion (38) reinforces the fixed cloth (30). The attaching sewn portion (37) and the reinforcing sewn portion (38) are formed continuously.

Description

Airbag device

The present invention relates to an airbag device that inflates and deploys an airbag in a vehicle and protects an occupant with the airbag.

¡Airbag devices are used to protect passengers in the event of a vehicle emergency or collision. The airbag device receives an occupant by an inflated and deployed airbag. At that time, in order to protect the occupant with certainty, the airbag needs to be fixed to the vehicle body and deployed within a predetermined range in the vehicle. In relation to this, an airbag apparatus in which a fixed cloth (fixed portion) fixed to a vehicle body is conventionally provided in an airbag is known (see Patent Document 1).

In a conventional airbag device, a fixed cloth is sewn, and two lower portions thereof are respectively attached to an airbag by sewing and fixed to a vehicle body to maintain the position of the airbag deployed in the vehicle.
However, in the conventional airbag apparatus, since the fixed cloth is sewn separately at a plurality of locations, the number of sewing steps increases. Since the sewing time of the fixed cloth also becomes long, the working efficiency of sewing tends to be low. In addition, the fixed cloth may be subjected to a large force due to a pull accompanying the deployment of the airbag or an impact received by the occupant. For this reason, it is also required to increase the strength of the fixed cloth so that the fixed cloth can withstand external force.

JP 2000-33846 A

The present invention has been made in view of the above-described conventional problems, and its purpose is to increase the strength of the fixed fabric of the airbag, while reducing the steps and time for sewing the fixed fabric, and to improve the sewing work efficiency. It is to improve.

The present invention is an airbag device including an airbag having a fixed cloth fixed to a vehicle body, and the fixed cloth is sewn in an overlapping manner with a main body cloth formed integrally with the airbag. The airbag device includes a reinforcing cloth, an attachment sewing part for attaching the reinforcing cloth to the main body cloth, and a reinforcement sewing part for reinforcing the fixed cloth, and the attachment sewing part and the reinforcing sewing part are continuously formed.

According to the present invention, the strength of the airbag fixing cloth can be increased. Further, it is possible to improve the sewing work efficiency by reducing the process and time for sewing the fixed cloth.

It is a figure which shows the airbag apparatus of this embodiment. It is a figure which shows the airbag expanded on the plane. It is a figure which shows the fixing member and the fixing cloth of an airbag. It is a figure which shows the fixing member attached to the airbag. It is a figure which decomposes | disassembles and shows the fixed cloth of an airbag. It is a figure which shows the sewing pattern of a main body cloth and a reinforcement cloth. It is a figure which shows the example of the fixed cloth formed by separating two sewing parts. It is a figure which shows the reinforcement cloth of other embodiment. It is a figure which shows the sewing pattern of the reinforcement cloth shown to FIG. 8B. It is a figure which shows the sewing pattern of the reinforcement cloth shown to FIG. 8B.

An embodiment of an airbag device of the present invention will be described with reference to the drawings.
In the present embodiment, a curtain airbag device (hereinafter simply referred to as an airbag device) that deploys an airbag in a curtain shape in a vehicle will be described as an example. The airbag device is mounted in a vehicle and receives and protects an occupant with an airbag that is inflated and deployed.

FIG. 1 is a view showing an airbag apparatus according to the present embodiment. In FIG. 1, the airbag apparatus 1 mounted in the vehicle 90 is shown as viewed from the passenger compartment. Further, the side wall 91 and the airbag device 1 of the vehicle 90 are schematically shown as viewed from the width direction of the vehicle 90 with the rear side of the vehicle 90 omitted. The airbag device 1 is shown through the inner surface of the vehicle 90.
In the present embodiment, the front and rear in the vehicle 90 are simply referred to as front and rear, and the front-rear direction in the vehicle 90 is simply referred to as front-rear direction. In addition, the upper and lower portions in the vehicle 90 are simply referred to as upper and lower portions, and the vertical direction in the vehicle 90 is simply referred to as the vertical direction.

As shown in the figure, the vehicle 90 has an upper roof rail 92, a front front pillar (A pillar) 93, a center pillar (B pillar) 94, and a rear rear pillar (C pillar) (see FIG. Not shown). The vehicle 90 includes a front door 95, a rear door 96, and

window portions

97 and 98 provided in the

doors

95 and 96.

The airbag device 1 includes a cylindrical inflator 2, a fixing member 10, and an airbag (curtain airbag) 20. The airbag device 1 is disposed inside a trim and a head lining (not shown) attached to the vehicle body. The airbag 20 is folded and attached to the vehicle 90 so as to be inflated and deployed. In addition, the airbag 20 is elongated and is disposed along the upper portion of the side wall 91. The airbag 20 is attached to the roof rail 92 along the front-rear direction, and is disposed from the rear pillar to the front pillar 93. The folded airbag 20 is fixed to the vehicle body by a plurality of fixing members 10. The fixing member 10 fixes a plurality of fixed cloths 30 included in the airbag 20 to the vehicle body.

The inflator 2 is a cylinder type gas generator. The inflator 2 is inserted into the airbag 20 and generates gas in the airbag 20. The inflator 2 is disposed above the center pillar 94 and attached to the roof rail 92. The inflator 2 is fixed to the vehicle body by fixing means (not shown). In the event of a vehicle emergency or impact detection, the inflator 2 generates gas from a plurality of gas outlets 2 A and supplies the gas to the airbag 20. With this gas, the airbag 20 is inflated and deployed in a curtain shape from the upper part of the side wall 91 downward.

FIG. 2 is a view showing the airbag 20 expanded on a plane.
As shown in the figure, the airbag 20 is a rectangular bag, and is manufactured, for example, from a base cloth made of a resin-coated cloth. Here, the airbag 20 includes a front base fabric (front panel) 21 on the passenger side and a back base fabric (back panel) 22 on the side wall 91 side. The airbag 20 includes a connection belt 23, a gas supply unit 24, and a plurality (six in FIG. 2) of fixed cloths 30. An inflator 2 (not shown in FIG. 2) is inserted into the gas supply unit 24. The front end of the airbag 20 is connected to the front pillar 93 by the connecting belt 23. The tip of the connecting belt 23 is fixed to the vehicle body.

The front base fabric 21 and the back base fabric 22 are formed in the same shape, overlapped, and joined along the outer edge joint portion 25. The outer edge joint portion 25 divides the airbag 20 and forms an inflatable portion 26 between the

base fabrics

21 and 22. The inflating part 26 is inflated by the gas generated by the inflator 2. The outer edge joint portion 25 defines the outer edge shape of the inflating portion 26. The

base fabrics

21 and 22 are joined by sewing and adhesion at the outer edge joint portion 25. That is, the

base fabrics

21 and 22 are sewn one or more times along the outer edge joint portion 25, and the sewn portions are sealed with an adhesive. Thereby, the

base fabrics

21 and 22 are joined in an airtight manner at the outer edge joint portion 25. The

base fabrics

21 and 22 may be joined only by sewing at the outer edge joint portion 25.

In the airbag 20, a front inflating portion 26A, a rear inflating portion 26B, and a connecting inflating portion 26C are formed by the outer edge joint portion 25. The inflating portions 26A to 26C each have a rectangular shape, and constitute the inflating portion 26 of the airbag 20 as a whole. The front inflating portion 26 A is disposed forward in the airbag 20. The rear inflating part 26 B is disposed rearward in the airbag 20. The connecting expansion part 26C connects the front expansion part 26A and the rear expansion part 26B. A non-expanding portion 27 is provided between the three expanding portions 26A to 26C.

The airbag 20 has a plurality (four in FIG. 2) of internal joint portions 28 in the inflatable portion 26. The

base fabrics

21 and 22 are joined at the inner joint portion 28 in the same manner as the outer edge joint portion 25. The tip of the internal joint portion 28 is joined in an annular shape within the expansion portion 26. The plurality of internal joints 28 are arranged apart from each other in the front-rear direction, and form a gas circulation part and an air chamber in the expansion part 26.

The gas supply unit 24 is an opening for supplying gas into the airbag 20. The gas supply unit 24 is formed in the middle of the airbag 20 in the front-rear direction. The

base fabrics

21 and 22 protrude obliquely upward from an upper edge (referred to as an upper edge) of the airbag 20 in the gas supply unit 24. The edge portions of the

base fabrics

21 and 22 are continuously joined from the outer edge joint portion 25 except for the insertion port 24A at the tip. Thereby, the gas supply part 24 is formed in the cylinder shape which both ends opened, and is provided in the upper edge part of the airbag 20 integrally. The inside of the gas supply unit 24 is connected to the outside of the airbag 20 through the insertion port 24A at one end, and is connected to the inside of the inflating unit 26 at the other end. The inflator 2 is inserted into the gas supply unit 24 from the insertion port 24 A and is disposed in the airbag 20. The gas supply unit 24 is fastened with a band (not shown) and fixed to the inflator 2 in an airtight manner.

The inflator 2 generates gas in the gas supply unit 24 and supplies the gas into the airbag 20. The inflatable portion 26 is inflated by the gas, and the airbag 20 is deployed in a curtain shape while eliminating the folded shape. The gas is supplied to the front expansion part 26A and is supplied from the connection expansion part 26C to the rear expansion part 26B. Thereby, the airbag 20 is inflated and deployed so as to cover the side wall 91 and closes the

windows

97 and 98. The airbag 20 receives the front and rear occupants and protects the occupant's head.

The airbag 20 is attached to the vehicle body by a plurality of fixed cloths 30. The fixed cloth 30 is a portion (fixed portion) fixed to the vehicle body of the airbag 20, and is integrally formed on the upper edge portion of the airbag 20, and is fixed to each portion of the vehicle body by the fixing member 10 (see FIG. 1). Fixed. Hereinafter, the fixing member 10 and the fixing cloth 30 will be described.

FIG. 3 is a view showing the fixing member 10 and the fixing cloth 30 of the airbag 20. FIG. 3A is a perspective view of the fixing member 10. FIG. 3B is a view showing the fixed cloth 30 of the airbag 20. The fixed cloth 30 shown in FIG. 3B is sewn by sewing portions 37 and 38 (shown by broken lines) as described later.
FIG. 4 is a view showing the fixing member 10 attached to the airbag 20. FIG. 4A is a perspective view of the fixing member 10. 4B is a side view of the fixing member 10 and the airbag 20 as viewed from the direction of the arrow X in FIG. 4A. The airbag 20 is attached to the vehicle body in the folded shape shown in FIG.

The fixing member 10 is a bracket for attaching the folded airbag 20 to the vehicle body. As shown in FIG. 3A, the fixing member 10 is composed of a plate-like member bent at a plurality of locations. The fixing member 10 (see FIG. 4) is disposed around the airbag 20 along the outer surface of the airbag 20 to hold the airbag 20. In addition, the fixing member 10 includes an attachment portion 11 that protrudes upward, and an attachment hole 12 that is formed in the attachment portion 11. The attachment portion 11 is attached to the vehicle body by attachment means, for example, a bolt (not shown) inserted into the attachment hole 12.

The fixed cloth 30 includes a rectangular protrusion 31 and a base 32 as shown in FIG. 3B. The protruding portion 31 protrudes from the edge of the airbag 20 (upper edge in FIG. 3B). The base portion 32 is a portion located around the protruding portion 31 in the edge portion of the airbag 20. The fixed cloth 30 has an insertion portion 33 into which the fixing member 10 is inserted. The insertion portion 33 is formed of a straight slit and is formed along the upper edge portion of the airbag 20, and the length thereof is longer than the width of the attachment portion 11.

The attachment part 11 of the fixing member 10 is inserted into the insertion part 33 provided in the fixing cloth 30 and penetrates the fixing cloth 30. Thereafter, the fixing member 10 is tilted and placed on the outer surface of the airbag 20 as shown in FIG. The protruding portion 31 of the fixing cloth 30 is bent along the insertion portion 33 of the attachment portion 11 when the fixing member 10 is tilted, and is arranged along the fixing member 10. Thereby, the fixing member 10 is attached to the fixing cloth 30 and the airbag 20. By attaching the attachment portion 11 to the vehicle body, the fixed cloth 30 is fixed to the vehicle body by the fixing member 10 inserted into the insertion portion 33. Next, the fixed cloth 30 will be described in detail.

FIG. 5 is an exploded view of the fixed cloth 30.
The fixed cloth 30 includes a main body cloth 34 and a reinforcing cloth 40 which are integrated by sewing as shown in the figure. The main body cloth 34 is an integral cloth integrally formed with the airbag 20, and has rectangular cloths respectively formed on the

base cloths

21 and 22 of the airbag 20. The fixed cloth 30 has two main body cloths 34 that overlap each other. As with the fixed cloth 30, the main body cloth 34 includes a protruding portion 31A, a base portion 32A, an insertion portion 33A, two concave portions 35A, and two through holes 36A. The concave portion 35A and the through hole 36A are formed in the base portion 32A on both sides of the protruding portion 31A.

The reinforcing cloth 40 is made of one or a plurality of cloths separate from the airbag 20. The reinforcing cloth 40 is formed in the same shape as the main body cloth 34 by the base cloth, and has the protruding portion 31B, the base portion 32B, the insertion portion 33B, the concave portion 35B, and the through hole 36B, as with the main body cloth 34. The reinforcing cloth 40 is superimposed on the main body cloth 34 and is sewn to the main body cloth 34 at a predetermined position. At that time, the main body cloth 34 and the reinforcing cloth 40 are accurately overlapped by aligning the positions of the

recesses

35A and 35B and the through

holes

36A and 36B. The insertion portions 33 A and 33 B are disposed at the same position and penetrate the main body cloth 34 and the reinforcing cloth 40. The reinforcing cloth 40 is coupled to the main body cloth 34 by sewing. The reinforcing cloth 40 reinforces the main body cloth 34 and increases the strength of the fixed cloth 30. The recesses 35 (35A, 35B) are provided to facilitate bending of the protrusion 31 when the protrusion 31 of the fixed cloth 30 is bent by the fixing member 10. Accordingly, when the ease of bending the protruding portion 31 does not matter, the recessed portion 35 may not be provided in the fixed cloth 30. In this case, for example, the corner between the protruding portion 31 and the base portion 32 is formed in a curved shape, and the protruding portion 31 and the base portion 32 are connected by the curved portion.

In the present embodiment, the reinforcing cloth 40 is made of a plurality of overlapping cloths having the same shape. Moreover, the two reinforcing cloths 40 are formed so as to be connected by the protruding portion 31B, and are folded at the boundary of the protruding portion 31B. The main body cloth 34 is disposed between the plurality of folded reinforcing cloths 40. The two main body cloths 34 are sandwiched between the reinforcing cloths 40. The fixed cloth 30 is composed of a plurality of cloths including two main body cloths 34 and a plurality of reinforcing cloths 40. The reinforcing cloth 40 is overlapped with the main body cloth 34 and sewn, and the main body cloth 34 and the reinforcing cloth 40 are joined.

FIG. 6 is a diagram illustrating a sewing pattern of the main body cloth 34 and the reinforcing cloth 40. FIG. 6A is a diagram illustrating the fixed cloth 30 after sewing. 6B and 6C are diagrams illustrating a sewing process of the fixed cloth 30. FIG.
As shown in the figure, the fixed cloth 30 has two kinds of

sewing parts

37 and 38, that is, an attaching sewing part 37 for attaching the reinforcing cloth 40 to the main body cloth 34 and a reinforcing sewing part 38 for reinforcing the fixing cloth 30. Sewing is performed by the attachment sewing portion 37 and one reinforcing sewing portion 38.
The main body cloth 34 and the reinforcing cloth 40 are overlapped and sewn together at the

sewing portions

37 and 38, whereby the main body cloth 34 and the reinforcing cloth 40 are joined to form the fixed cloth 30 on the airbag 20.

The attachment sewing portion 37 is formed linearly across the base portion 32 of the fixed cloth 30, whereby the entire base portion 32 is sewn. The attachment sewing portion 37 is formed on the base cloth 32 and the base portion 32 of the reinforcement cloth 40 and is formed to the outside of the reinforcement cloth 40, and the reinforcement cloth 40 is attached to the main body cloth 34 by sewing at the attachment sewing section 37. . In addition, in the fixed cloth 30, the bottom of the recessed part 35 is a part where load is easily applied, and the attachment sewing part 37 needs to be formed across the lower part of the bottom of the at least two recessed parts 35. That is, the attachment sewing portion 37 may be formed across the lower portion of the bottom of the concave portion 35, and may not be formed outside the lower portion of the bottom of the concave portion 35. However, the attachment sewing portion 37 is preferably formed as described above in order to reliably cope with the load on the fixed cloth 30.

The reinforcing sewing portion 38 is formed on the fixed fabric 30 by sewing the fixed fabric 30 along the insertion portion 33, and is formed in an annular shape (rectangular shape in FIG. 6) surrounding the insertion portion 33 of the fixed fabric 30. The insertion part 33 of the cloth 30 is reinforced. The reinforcing cloth 40 and the main body cloth 34 are sewn into a rectangular shape by the reinforcing sewing portion 38. That is, the fixed cloth 30 is reinforced by the reinforcing sewing portion 38 by integrating the reinforcing cloth 40 and the main body cloth 34. The reinforcement sewing portion 38 reinforces the peripheral portion of the insertion portion 33 and increases the strength around the insertion portion 33.

The two

sewing parts

37 and 38 are not formed separately on the fixed cloth 30, but are formed integrally. That is, the attachment sewing part 37 and the reinforcement sewing part 38 are connected and formed continuously by one sewing. Since the fixed cloth 30 is joined by one sewing, the entire shape of the

sewing portions

37 and 38 is set to a shape that can be written with one stroke. The attachment sewing part 37 and the reinforcement sewing part 38 have a contact part or an overlapping part.

In the sewing pattern shown in FIG. 6, the linear portions of the

sewing portions

37 and 38 are provided at the same position on the base portion 32. The reinforcement sewing portion 38 is formed so as to overlap the intermediate portion of the attachment sewing portion 37. When the fixed cloth 30 is sewn, the entire sewn

portions

37 and 38 are sewn continuously as in a single stroke. At that time, first, sewing is started from one end of the attachment sewing portion 37 (see FIG. 6B), and when the attachment sewing portion 37 is formed to a predetermined position, the sewing direction is changed and the portion to be sewn is attached to the sewing The portion 37 is changed to the reinforcement sewing portion 38. Further, the fixed cloth 30 is sewn in a rectangular shape so as to surround the insertion portion 33, thereby forming a reinforcing sewing portion 38 (see FIG. 6C). Subsequently, the other end of the attachment sewing portion 37 is sewn, and the sewing is finished.

Thus, after forming the attachment sewing portion 37 partway, the entire reinforcement sewing portion 38 is formed, and subsequently, the remaining portion of the attachment sewing portion 37 is formed. That is, a linear attachment sewing portion 37 and a rectangular reinforcement sewing portion 38 are continuously formed on the fixed cloth 30 by one sewing. Thereby, the main body cloth 34 and the reinforcing cloth 40 are sewn together, and the reinforcing cloth 40 is attached to the main body cloth 34. Further, the fixed cloth 30 is formed by a plurality of combined cloths and provided on the airbag 20. Thereafter, the fixing member 10 (see FIG. 4) is attached to the fixing cloth 30. The reinforcing cloth 40 is fixed to the vehicle body together with the main body cloth 34 by the fixing member 10 after being attached to the main body cloth 34.

FIG. 7 is a diagram illustrating an example of the fixed cloth 30 formed by separating the two

sewing portions

37 and 38.
As shown in the figure, when the

sewing portions

37 and 38 are separately formed on the fixed cloth 30, two steps are required for sewing the fixed cloth 30. On the other hand, in this embodiment (refer FIG. 6), the two

sewing parts

37 and 38 are formed continuously. Therefore, the sewing of the

sewing parts

37 and 38 can be performed in one step without being interrupted. Since the process and time for sewing the fixed cloth 30 can be reduced, the work efficiency of sewing can be improved.

According to the present embodiment, since the reinforcing cloth 40 is overlapped and sewn on the main body cloth 34, the strength of the fixed cloth 30 can be increased. In addition, the reinforcing cloth 40 is attached to the main body cloth 34 by the attachment sewing portion 37, and the fixed cloth 30 is reinforced by the reinforcing sewing portion 38. Therefore, the reinforcing cloth 40 and the main body cloth 34 can be coupled with high strength. The strength of the fixed cloth 30 can be further increased by reinforcing the reinforcement sewing portion 38. The plurality of cloths of the fixed cloth 30 receive external force jointly without receiving external force alone. As a result, the fixed cloth 30 has high strength against external force and is not easily torn.

When the insertion portion 33 is reinforced by the reinforcing sewing portion 38 formed around the insertion portion 33, the strength of the peripheral portion of the insertion portion 33 can be increased. Thereby, since the fixed cloth 30 is difficult to be broken around the insertion portion 33, it is possible to prevent the fixed cloth 30 from being detached from the fixed member 10. By forming the reinforcement sewing portion 38 so as to surround the insertion portion 33, the entire periphery of the insertion portion 33 can be reinforced. When the attachment sewing portion 37 is formed on the base cloth 32 and the base portion 32 of the reinforcing cloth 40, the reinforcing cloth 40 can be firmly attached to the main body cloth 34 at the base portion 32. Further, the force applied to the fixed cloth 30 acts on the base 32 where the main body cloth 34 and the reinforcing cloth 40 are sewn. Therefore, it is possible to prevent the protruding portion 31 of the fixed cloth 30 or the base of the protruding portion 31 from being damaged by an external force.

Note that the reinforcing cloth 40 may be composed of a single cloth superposed on the main body cloth 34, or may be composed of a plurality of cloths. Further, the same number of reinforcing cloths 40 may be arranged on both surfaces of the main body cloth 34, or different numbers may be arranged on each surface of the main body cloth 34. The main body cloth 34 may be disposed on one surface of the reinforcing cloth 40 without being disposed between the reinforcing cloths 40. The attachment sewing portion 37 may be formed in a shape other than a straight shape (for example, a curved shape or a wave shape). The reinforcing sewing portion 38 may be formed in a shape other than a rectangular shape (for example, a circular shape or a polygonal shape). Next, a reinforcing fabric according to another embodiment will be described.

FIG. 8 is a diagram showing reinforcing cloths 50 to 52 according to another embodiment.
In the reinforcing cloth 50 shown in FIG. 8A, only the shape of the insertion portion 33B is different from the reinforcing cloth 40 described above. The insertion portion 33B of the reinforcing cloth 50 is formed of a slit having a predetermined width. The insertion portion 33A of the main body cloth 34 is formed in the same shape as the insertion portion 33B of the reinforcing cloth 50. The reinforcing cloth 50 and the main body cloth 34 are overlapped and sewn by the

sewing portions

37 and 38.

8B has a insertion portion 39 made of a circular hole instead of the slit-shaped insertion portion 33B. The reinforcing cloth 51 is configured in the same manner as the above-described reinforcing cloth 40 except for the insertion portion 39. The insertion portion 39 of the reinforcing cloth 51 is a fixing hole into which a fixing member (not shown) such as a bolt is inserted. An insertion portion (fixed hole) having the same shape as the insertion portion 39 is formed in the main body cloth 34 in place of the insertion portion 33A. After the reinforcement cloth 51 and the main body cloth 34 are sewn, the fixing cloth 30 is fixed to the vehicle body by a fixing member inserted into the insertion portion 39.

8C does not have the recess 35B and the through hole 36B. The reinforcing cloth 52 is configured in the same manner as the reinforcing cloth 51 shown in FIG. 8B except for the recess 35B and the through hole 36B. The reinforcing cloth 52 and the main body cloth 34 are overlapped with their edges aligned, and are sewn by the

sewing portions

37 and 38.

9 and 10 are diagrams showing two sewing patterns of the reinforcing cloth 51. FIG.
In the sewing pattern shown in FIG. 9, as in the case of the reinforcing cloth 40 (see FIG. 6), the attachment sewing portion 53 A and the reinforcing sewing portion 54 A are continuously connected and formed continuously by one sewing. The reinforcing cloth 51 and the main body cloth 34 are continuously sewn by the attachment sewing portion 53A and the reinforcing sewing portion 54A. In that case, sewing (refer FIG. 9A) is started from the end of the attachment sewing part 53A. After the attachment sewing portion 53A is formed to a predetermined position, the entire insertion portion 39 is surrounded and sewn. As a result, an annular reinforcing sewing portion 54 A (see FIG. 9B) is formed around the insertion portion 39 so as to surround the insertion portion 39. Subsequently, sewing is performed to the other end of the attachment sewing portion 53A, and the sewing is finished. The attachment sewing portion 53A is formed in the reinforcing cloth 51 without traversing the base portion 32B.

In the sewing pattern shown in FIG. 10, the attachment sewing portion 53B and the reinforcement sewing portion 54B are continuously formed. However, the reinforcing sewing portion 54B is formed around the insertion portion 39 so as to surround a part of the insertion portion 39 (here, the lower half). The reinforcing sewing part 54 B is formed along a part of the insertion part 39 and surrounds a part of the insertion part 39. The reinforcement sewing portion 54 B reinforces a part around the insertion portion 39. Like the reinforcement sewing portion 54B, the reinforcement sewing portion of the fixed cloth 30 is formed in various shapes and positions according to the portion of the fixed cloth 30 to be reinforced.

DESCRIPTION OF SYMBOLS 1 ... Airbag apparatus, 2 ... Inflator, 2A ... Spout, 10 ... Fixing member, 11 ... Mounting part, 12 ... Mounting hole, 20 ... Airbag, 21 ... front base fabric, 22 ... back base fabric, 23 ... connection belt, 24 ... gas supply part, 25 ... outer edge joint part, 26 ... expansion part, 27 ... non Expansion part 28 ... Internal joint part 30 ... Fixed cloth 31 ... Projection part 32 ... Base part 33 ... Insertion part 34 ... Body cloth 35 ... Concave part , 36... Through hole, 37... Attachment sewing portion, 38 .. reinforcement sewing portion, 39 .. insertion portion, 40 .. reinforcement cloth, 50 to 52 .. reinforcement cloth, 53.・ Attachment sewing part, 54 ・・・ Reinforcement sewing part, 90 ・・・ Vehicle, 91 ・・・ Side wall, 92 ・・・ Roof rail, 93 ・・・ Front pillar, 94 ・・The center pillar, 95 ... front door, 96 ... rear door, 97 and 98 ... window.

Claims

An airbag device including an airbag having a fixed cloth fixed to a vehicle body,
A fixed cloth is integrally formed with the airbag. Have
An airbag device in which an attachment sewing portion and a reinforcement sewing portion are continuously formed.
In the airbag apparatus described in Claim 1,
An insertion portion provided in the fixed cloth, and a fixing member that is inserted into the insertion portion and fixes the fixed cloth to the vehicle body,
An airbag device in which a reinforcing sewing portion is formed around an insertion portion to reinforce the insertion portion of the fixed cloth.
In the airbag apparatus described in Claim 1 or 2,
The main body cloth and the reinforcing cloth have a protrusion protruding from the edge of the airbag, and a base in the edge of the airbag,
An airbag device in which an attachment sewing part is formed on a base part of a main body cloth and a reinforcing cloth.
In the airbag apparatus as described in any one of Claim 1 thru | or 3,
The airbag apparatus which has a part which an attachment sewing part and a reinforcement sewing part contact, or an overlapping part.
In the airbag apparatus as described in any one of Claim 2 thru | or 4,
An airbag device in which a reinforcing sewing portion is formed surrounding the insertion portion.
In the airbag apparatus as described in any one of Claim 2 thru | or 4,
The airbag apparatus in which the reinforcement sewing part was formed along a part of insertion part.