JP2013023029A - Airbag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a step and a time for sewing a fixed cloth while increasing the strength of a fixed cloth of an airbag.SOLUTION: An airbag 20 has a fixed cloth 30 fixed to a vehicle body. The fixed cloth 30 has a coupling sewing part 37 and a reinforcement sewing part 38. The fixed cloth 30 is coupled to the airbag 20 with the coupling sewing part 37. The reinforcement sewing part 38 reinforces the fixed cloth 30. The coupling sewing part 37 and reinforcement sewing part 38 are formed successively. The fixed cloth 30 is sewn with the coupling sewing part 37 and reinforcement sewing part 38, and fixed to the vehicle body.

Description

  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. On the other hand, 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 of the fixed cloth are attached to the airbag by sewing. The fixed cloth is fixed to the vehicle body and maintains the position of the airbag that is 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 relates to an airbag device including an airbag having a fixed cloth fixed to a vehicle body, wherein the fixed cloth joins the fixed cloth to the airbag, and a reinforcing sewing section reinforces the fixed cloth. The combined sewing part and the reinforcement sewing part are the airbag apparatus formed continuously.

  According to the present invention, the strength of the fixed fabric of the airbag 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 an airbag and a fixed cloth. It is a figure which shows the sewing pattern of a fixed 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 fixed cloth of other embodiment. It is a figure which shows the sewing pattern of the fixed cloth shown to FIG. 8B. It is a figure which shows the sewing pattern of the fixed 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 invention, 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, 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 </ b> 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 the connecting belt 3, the gas supply unit 23, 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 23. The front end of the airbag 20 is connected to the front pillar 93 by the connecting belt 3. The tip of the connecting belt 3 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 24. The outer edge joint portion 24 partitions the airbag 20 and forms an inflatable portion 25 between the base fabrics 21 and 22. The inflating part 25 is inflated by the gas generated by the inflator 2. The outer edge joint portion 24 defines the outer edge shape of the inflating portion 25. The base fabrics 21 and 22 are joined by sewing and adhesion at the outer edge joint portion 24. That is, the base fabrics 21 and 22 are sewn one or more times along the outer edge joint portion 24, 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 24. The base fabrics 21 and 22 may be joined only by sewing at the outer edge joint portion 24.

  In the airbag 20, a front inflating portion 25 </ b> A, a rear inflating portion 25 </ b> B, and a connected inflating portion 25 </ b> C are formed by the outer edge joint portion 24. The inflating portions 25A to 25C each have a rectangular shape, and constitute the inflating portion 25 of the airbag 20 as a whole. The front inflating portion 25 </ b> A is disposed forward in the airbag 20. The rear inflating portion 25 </ b> B is disposed rearward within the airbag 20. The connecting expansion portion 25C connects the front expansion portion 25A and the rear expansion portion 25B. A non-expanding portion 26 is provided between the three expanding portions 25A to 25C.

  The airbag 20 has a plurality (four in FIG. 2) of internal joint portions 27 in the inflatable portion 25. The base fabrics 21 and 22 are joined at the inner joint portion 27 in the same manner as the outer edge joint portion 24. The tip of the internal joint portion 27 is joined in an annular shape within the expansion portion 25. The plurality of internal joint portions 27 are arranged apart from each other in the front-rear direction, and form a gas circulation portion and an air chamber in the expansion portion 25.

  The gas supply unit 23 is an opening for supplying gas into the airbag 20. The gas supply unit 23 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 23. The edge portions of the base fabrics 21 and 22 are continuously joined from the outer edge joint portion 24 except for the insertion port 23A at the tip. Thereby, the gas supply part 23 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 23 is connected to the outside of the airbag 20 through the insertion port 23A at one end, and is connected to the inside of the inflating unit 25 at the other end. The inflator 2 is inserted into the gas supply unit 23 from the insertion port 23 </ b> A and is disposed in the airbag 20. The gas supply unit 23 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 23 and supplies the gas into the airbag 20. The inflatable portion 25 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 25A and is supplied from the connection expansion part 25C to the rear expansion part 25B. 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. The fixed cloth 30 is integrally formed on the upper edge portion of the airbag 20. The fixed cloth 30 is fixed to each part of the vehicle body by the fixing member 10 (see FIG. 1). 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 along the outer surface of the airbag 20. The fixing member 10 is disposed around the airbag 20 and holds 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 (not shown). At that time, the attachment portion 11 is attached to the vehicle body by, for example, a bolt inserted into the attachment hole 12.

  As illustrated in FIG. 3B, the fixed cloth 30 includes a rectangular protrusion 31 and a base 32. 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 linear slit and penetrates the fixed cloth 30. The insertion portion 33 is formed along the upper edge portion of the airbag 20. The length of the insertion portion 33 is longer than the width of the attachment portion 11.

  As shown in FIG. 4, the attachment portion 11 of the fixing member 10 is inserted into an insertion portion 33 provided on the fixed cloth 30 and penetrates the fixed cloth 30. Thereafter, the fixing member 10 is disposed on the outer surface of the airbag 20. The protruding portion 31 of the fixed cloth 30 is bent by the movement of the mounting portion 11 and is disposed along the fixed 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 fixing 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 airbag 20 and the fixed cloth 30.
The airbag 20 includes a coupling portion 28 to which the fixed cloth 30 is coupled as illustrated. The coupling portion 28 is a predetermined portion located in the edge portion of the airbag 20. The base portion 32 of the fixed cloth 30 is overlapped with the coupling portion 28. The airbag 20 has one recess 28 </ b> A and two through holes 29 in the coupling portion 28. The recess 28 </ b> A is formed at the center of the coupling portion 28. The two through holes 29 are formed on both sides of the recess 28A. The fixed cloth 30 is coupled to the coupling portion 28 of the airbag 20 by sewing.

  The fixed cloth 30 is made of one or a plurality of cloths separate from the airbag 20. The fixed cloth 30 is formed of a base cloth. Further, the fixed cloth 30 has two concave portions 35 and two through holes 36. The recess 35 and the through hole 36 are formed in the base 32 on both sides of the protrusion 31. The fixed cloth 30 is superimposed on the airbag 20 (the coupling portion 28), and is sewn to the airbag 20 at a predetermined location. At that time, the airbag 20 and the fixed cloth 30 are accurately overlapped by aligning the positions of the through holes 29 and 36. The insertion portion 33 and the concave portion 35 of the fixed cloth 30 are disposed in the recess 28 </ b> A of the coupling portion 28. The fixed cloth 30 is integrated with the airbag 20 by sewing.

  In the present embodiment, the fixed cloth 30 is made of cloths having the same shape and overlapping each other. The fixed cloth 30 is composed of a plurality of cloths, and the strength of the fixed cloth 30 is increased. Further, the two fixed cloths 30 are formed so as to be connected by the protruding portion 31 and are folded at the boundary of the protruding portion 31. The airbag 20 is disposed between a plurality of folded fixed cloths 30 and is sandwiched between the fixed cloths 30. The fixed cloth 30 is superimposed on the airbag 20 and sewn, and the fixed cloth 30 and the airbag 20 are joined.

FIG. 6 is a diagram illustrating a sewing pattern of the fixed cloth 30. 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.
The fixed cloth 30 has two types of sewing parts 37 and 38 as shown in the figure. The sewing parts 37 and 38 include a joint sewing part 37 that couples the fixed cloth 30 to the airbag 20 and a reinforcing sewing part 38 that reinforces the fixed cloth 30. The fixed cloth 30 is sewn with one combined sewing portion 37 and one reinforcing sewing portion 38. The fixed cloth 30 and the airbag 20 are overlapped and stitched together at the joint sewing portion 37. The combined sewing portion 37 is formed by sewing the fixed cloth 30 on the airbag 20. The fixed cloth 30 and the airbag 20 are joined by the joint sewing portion 37 to form the fixed cloth 30 on the airbag 20.

  The combined sewing portion 37 is an attachment sewing portion for attaching the fixed cloth 30 to the airbag 20. The combined sewing portion 37 is formed on the fixed cloth 30 by sewing across the base portion 32 of the fixed cloth 30. The whole base portion 32 is sewn by the linear joint sewing portion 37. The combined sewing portion 37 is formed on the base 32 of the fixed cloth 30 and is formed outside the fixed cloth 30. The fixed cloth 30 is sewn to the airbag 20 by the joint sewing portion 37 and attached to the airbag 20 by sewing.

  The reinforcement sewing portion 38 is formed by sewing the fixed cloth 30. The fixed cloth 30 is sewed by the reinforcing sewing portion 38 and reinforced by sewing. Further, the reinforcing sewing portion 38 is formed around (the peripheral portion) around the insertion portion 33 and reinforces the insertion portion 33 of the fixed cloth 30. The reinforcing sewing portion 38 is formed on the fixed cloth 30 by sewing the fixed cloth 30 along the insertion portion 33. The reinforcing sewing portion 38 is formed in an annular shape (rectangular shape in FIG. 8) surrounding the insertion portion 33 of the fixed cloth 30. The fixed cloth 30 is sewn into a rectangular shape at the reinforcement sewing portion 38. The fixed cloth 30 is reinforced by integrating a plurality of cloths by the reinforcing sewing portion 38. 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 portions 37 and 38 are not formed separately on the fixed cloth 30 but are formed integrally. That is, the joint sewing part 37 and the reinforcement sewing part 38 are connected and formed continuously by one sewing. The fixed cloth 30 is sewn only once. Therefore, the whole shape of the sewing parts 37 and 38 is set to a shape that can be written with a single stroke. The combined sewing portion 37 and the reinforcing sewing portion 38 have a contact portion or an overlapping portion.

  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 reinforcing sewing portion 38 is formed so as to overlap the intermediate portion of the combined 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 combined sewing portion 37 (see FIG. 6B). When the combined sewing portion 37 is formed to a predetermined position, the sewing direction is changed, and the portion to be sewn is changed from the combined sewing portion 37 to the reinforced 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 sewing machine 37 is sewn to the other end, and the sewing is finished.

  In this way, after the combined sewing portion 37 is formed partway, the entire reinforcing sewing portion 38 is formed. Subsequently, the remaining portion of the combined sewing portion 37 is formed. On the fixed cloth 30, a linear joint sewing portion 37 and a rectangular reinforcement sewing portion 38 are continuously formed by one sewing. Thereby, the fixed cloth 30 and the airbag 20 are stitched together, and the fixed cloth 30 is attached to the airbag 20. The reinforcing sewing portion 38 is formed around the insertion portion 33 and reinforces the fixed cloth 30 around the insertion portion 33. 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 fixed cloth 30 is fixed to the vehicle body by the fixing member 10 after being attached to the airbag 20.

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 portions 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.

  Since the fixed cloth 30 is coupled to the airbag 20 by sewing, the fixed cloth 30 can be easily coupled to the airbag 20. The fixed cloth 30 and the airbag 20 can be combined with high strength. Since the fixed cloth 30 is reinforced by the reinforcing sewing portion 38, the strength of the fixed cloth 30 can be increased. 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. When the reinforcing sewing portion 38 is formed so as to surround the insertion portion 33, the entire area around the insertion portion 33 can be reinforced. When the joint sewing portion 37 is formed on the base portion 32 of the fixed cloth 30, the fixed cloth 30 can be firmly attached to the airbag 20 at the base portion 32. Further, the force applied to the fixed cloth 30 acts on the base portion 32 of the fixed cloth 30. 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.

  In addition, in the fixed cloth 30, the bottom of the recessed part 35 is a part where load is easily applied, and the joint sewing part 37 needs to be formed across the lower part of the bottom of at least two recessed parts 35. In other words, the combined sewing portion 37 only needs to be formed between the lower portions of the bottom of the recess 35, and may not be formed outside the lower portion of the bottom of the recess 35. However, the combined sewing portion 37 is preferably formed as described above in order to reliably cope with the load on the fixed cloth 30.

  The concave portion 35 of the fixed cloth 30 is provided to facilitate bending of the protruding portion 31 when the protruding portion 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. Further, the insertion portion 33 may be disposed outside the recess 28A (see FIG. 5) of the coupling portion 28. When the fixing cloth 30 has no recess 35 and the insertion portion 33 is disposed outside the recess 28A, the recess 28A is not necessary. Therefore, the recess 28 </ b> A does not need to be formed in the coupling portion 28.

  The fixed cloth 30 may be composed of one cloth superimposed on the airbag 20 or may be composed of a plurality of cloths. The same number of the fixing cloths 30 may be arranged on both sides of the airbag 20 or may be arranged so that the number of the fixing cloths 30 is different on each side of the airbag 20. The fixed cloth 30 may be disposed only on one surface of the airbag 20. The joint 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 fixed fabric according to another embodiment will be described.

FIG. 8 is a diagram illustrating fixed fabrics 50 to 52 according to another embodiment.
In the fixed cloth 50 shown in FIG. 8A, only the shape of the insertion portion 33 is different from the fixed cloth 30 described above. The insertion portion 33 of the fixed cloth 50 is formed of a slit having a predetermined width. The fixed cloth 50 is superimposed on the airbag 20 and is sewn by the sewing portions 37 and 38.

  A fixed cloth 51 shown in FIG. 8B has an insertion portion 39 formed of a circular hole instead of the slit-shaped insertion portion 33. The fixed cloth 51 is configured in the same manner as the fixed cloth 30 described above except for the insertion portion 39. The insertion portion 39 of the fixing cloth 51 is a fixing hole into which a fixing member (not shown) such as a bolt is inserted. After the fixing cloth 51 is sewn, the fixing cloth 51 is fixed to the vehicle body by a fixing member inserted into the insertion portion 39.

  The fixed cloth 52 shown in FIG. 8C does not have the recess 35 and the through hole 36. The fixed cloth 52 is configured in the same manner as the fixed cloth 51 shown in FIG. 8B except for the concave portion 35 and the through hole 36. The fixed cloth 52 and the airbag 20 are overlaid with their edges aligned. The fixed cloth 52 is sewn at the sewing portions 37 and 38.

9 and 10 are diagrams illustrating two sewing patterns of the fixed cloth 51. FIG.
In the sewing pattern shown in FIG. 9, similarly to the fixed cloth 30 (see FIG. 6), the combined sewing portion 53 </ b> A and the reinforcing sewing portion 54 </ b> A are continuously connected and formed continuously by one sewing. The fixed cloth 51 is continuously sewn by the joint sewing portion 53A and the reinforcement sewing portion 54A. At that time, sewing (see FIG. 9A) is started from one end of the combined sewing portion 53A. After the combined 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 </ b> 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 combined sewing portion 53A, and the sewing is finished. The combined sewing portion 53 </ b> A is formed in the fixed cloth 51 without traversing the base portion 32.

  Also in the sewing pattern shown in FIG. 10, the joint sewing portion 53B and the reinforcing sewing portion 54B are formed continuously. 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> 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> B reinforces a part around the insertion portion 39. Like this reinforcement sewing part 54B, the reinforcement sewing part of a fixed cloth is formed in various shapes and positions according to the part which should be reinforced of a fixed cloth.

  DESCRIPTION OF SYMBOLS 1 ... Airbag apparatus, 2 ... Inflator, 2A ... Spout, 3 ... Connection belt, 10 ... Fixing member, 11 ... Mounting part, 12 ... Mounting hole, 20 ... Airbag, 21 ... Front base fabric, 22 ... Back base fabric, 23 ... Gas supply part, 24 ... Outer edge joint part, 25 ... Inflatable part, 26 ... Non Expansion part, 27 ... Internal joint part, 28 ... Coupling part, 28A ... Depression, 29 ... Through-hole, 30 ... Fixed cloth, 31 ... Projection part, 32 ... Base part 33 ... Insertion part, 35 ... Recess, 36 ... Through hole, 37 ... Combined sewing part, 38 ... Reinforcement sewing part, 39 ... Insertion part, 50-52 ... Fixed cloth, 53 ... Combined sewing part, 54 ... Reinforcement sewing part, 90 ... Vehicle, 91 ... Side wall, 92 ... Roof rail, 93 ... Front pin Over, 94 ... center pillar, 95 ... front door, 96 ... rear door, 97 and 98 ... window.

Claims (6)

An airbag device including an airbag having a fixed cloth fixed to a vehicle body,
The fixed cloth has a combined sewing part that couples the fixed cloth to the airbag, and a reinforcing sewing part that reinforces the fixed cloth,
An airbag device in which a combined sewing portion and a reinforcing 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 fixed cloth has a protrusion protruding from the edge of the airbag and a base in the edge of the airbag;
An airbag device in which a combined sewing portion is formed on a base portion of a fixed cloth. In the airbag apparatus as described in any one of Claim 1 thru | or 3,
The airbag apparatus which has a part which a joint sewing part and a reinforcement sewing part contact | connect, 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.

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