JP4839997B2 - Air bag apparatus and manufacturing method thereof - Google Patents

Description

  The present invention relates to an airbag device used in a state where an inflator serving as a gas generation source is wrapped by an airbag made of an integral base fabric, and a method for manufacturing the airbag device.

  2. Description of the Related Art Conventionally, in an airbag apparatus in which an inflator is provided in the airbag as described above, an opening is formed through which a harness serving as a drive signal transmission wiring for the inflator is inserted and led out of the airbag. Need to be formed. As an example of such an opening, for example, the one employed in the airbag device described in Patent Document 1 is known. The opening illustrated here is formed as an insertion hole having a diameter slightly larger than that of the harness in the base fabric of the airbag, and the harness is led out of the airbag from the insertion hole.

  On the other hand, as such a harness lead-out structure, for example, the one shown in FIG. 6 is also conceivable. As shown in FIG. 6, in this lead-out structure, an opening 250 extending in the same direction as the mounting direction of the inflator 210 is formed in the base end portion 230 of the airbag 220 in which the inflator 210 is wrapped. And the harness 240 is extended from the cylinder lower side of the inflator 210, and this extended harness 240 is derived | led-out through the said opening part 250 outside.

In such a harness lead-out structure, gas is ejected from the inflator 210 upon detection of an impact on the vehicle, and the ejected gas flows into the airbag 220 and the airbag 220 starts to inflate. At this time, the opening 250 also functions as a vent hole for releasing the gas filled in the airbag 220 to the outside.
JP 2001-30865 A

  As described above, by using the opening 250 for leading out the harness 240 of the inflator 210 as a vent hole, a rapid increase in internal pressure of the airbag 220 can be suppressed. However, the level of the internal pressure required for the air bag should be determined according to the structure of the vehicle on which the air bag is mounted, and depending on the vehicle, it is required to maintain the internal pressure of the air bag at a high level. There are many cases. Therefore, in order to meet such a requirement, it is conceivable to close the opening 250 by sewing the portion where the opening 250 is formed together with the airbag 220 with a sewing machine. If it is to be completely closed, due to the structure of the sewing machine, it is not easy to cope with it, for example, the plate portion that fixes the object to be sewn interferes with the harness.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to facilitate adjustment of the opening degree of the opening for leading out the harness formed in the airbag while having a simple structure. It is in providing the airbag apparatus which can suppress suitably the fall of this, and its manufacturing method.

In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that an inflator serving as a gas generation source is wrapped along a folded portion of an airbag in which an integral base fabric is folded in two and stitched, and the folded portion In the airbag device in which the harness connected to the inflator is led out through the opening formed along the opening, the harness is led out from the end of the opening near the inflator and the rest of the opening the parts, Ri Na blocked by stitched cloth pieces to the base fabric so as to cover it, the fabric piece, the ends of the inflator side of the said opening which said harness is derived, The gist of the invention is that the base fabric is sewn in such a manner as to cover at least a part thereof .

  According to this configuration, since the portion of the opening other than the portion from which the harness is led out is covered with the cloth piece, the outflow of gas from the opening during inflation of the airbag is suppressed. Become. That is, it is a simple structure that does not need to sew the base fabrics to the vicinity of the harness in order to close the remaining portion of the opening, but closes the opening for the harness formed in the airbag to reduce the internal pressure of the airbag. The reduction can be suitably suppressed.

Further, according to the configuration, the cloth piece is sewn to the base cloth in a mode of covering at least part of the end portion of the opening portion near the inflator from which the harness is led out. The gap between the piece and the harness can be further reduced. For this reason, the suppression effect of the fall of the internal pressure at the time of an airbag expansion | swelling comes to be further promoted.
According to the second aspect of the present invention, an inflator serving as a gas generation source is wrapped along a folded portion of an airbag in which an integral base fabric is folded and stitched, and an opening formed along the folded portion. In the airbag device in which the harness connected to the inflator is led out via the air bag, the harness is led out from the end of the opening close to the inflator, and the remaining part of the opening covers the same And the length of the opening along the bent portion is set to the length of the cloth piece in the direction of the bent portion. The gist is that it is equal to the added length.

  According to a third aspect of the present invention, in the airbag device according to the first or second aspect, the cloth piece is previously extended from the base fabric to the side where the opening is formed as a part of the base fabric. The gist is that the partial distribution is folded and stitched to the base fabric.

  According to this configuration, it is not necessary to prepare the cloth piece separately by effectively using the integral base cloth. That is, by reducing the number of parts, simplification of parts management and simplification of the structure of the airbag device itself can be achieved.

In the invention according to claim 4, an inflator serving as a gas generation source is wrapped along a folded portion of an airbag in which an integral base fabric is folded and stitched, and an opening formed along the folded portion. In the airbag device in which the harness connected to the inflator is led out via the air bag, the harness is led out from the end of the opening close to the inflator, and the remaining part of the opening covers the same The cloth piece is closed by a cloth piece sewn to the base cloth, and the cloth piece is formed in advance as a part of the base cloth so as to extend from the base cloth to the side where the opening is formed. The distribution is folded and stitched to the base fabric, and the distribution of the portion is symmetrical with respect to the extension line of the bent portion in one of the extending directions of the bent portion of the base fabric. Extending in a rectangular shape The base fabric is formed along a boundary line with one side of the bent portion of the distribution of the portion and a bent portion on the side where the same portion distribution is provided from the boundary line. A L-shaped cut is provided along the harness, and the harness connected to the inflator is led out using the cut provided along the bent portion as the opening, and the base fabric is folded in two and remains. The gist is that the distribution is sequentially folded on the base fabric side to form the cloth pieces.

  According to this configuration, the opening degree of the opening can be adjusted by adjusting the cut length of the cut provided along the bent portion of the base fabric and the extended length of the portion distribution formed to extend in the rectangular shape. It becomes. Therefore, it is possible to easily adjust the internal pressure when the airbag is inflated while having a simple and efficient structure that effectively uses a single base fabric.

  According to a fifth aspect of the present invention, in the airbag device according to the third or fourth aspect, the stitches of the part distribution with respect to the base cloth are commonly stitched with the stitches of the outer peripheral edge of the base cloth. To do.

  According to this configuration, since the part distribution is fixed to the airbag (base cloth) at the same time when the base fabrics are stitched together, the process of closing the remaining part of the opening is simplified, and the manufacture thereof is performed. The efficiency can be further improved.

  In order to solve the above-mentioned problem, the invention according to claim 6 is a rectangular shape having line symmetry with respect to the extension line of the bent portion on one side of the extending direction of the bent portion of one base fabric folded in half. A step of cutting a base fabric to be used as an airbag so as to have a convex shape as a whole, and the bent portion of the partial distribution with respect to the base fabric cut into the convex shape as a boundary A step of providing an L-shaped notch along a boundary line with the one side and a bent portion on the side where the distribution of the same part is provided from the boundary line, and along the bent portion of the base fabric A step of deriving a harness connected to the inflator from an end of the opening close to the inflator with an incision on the side provided along the bent portion as an opening, and an inflator serving as a gas generation source; installed The step of folding the base fabric in half so as to wrap the inflator, the step of sequentially folding the base fabric so as to wrap the base fabric by the partial distribution remaining by folding the base fabric, and the folded portion distribution, And a step of sewing the outer peripheral edge of the base fabric.

  According to such a manufacturing method, an airbag capable of suppressing a decrease in internal pressure can be easily and inexpensively manufactured by an extremely efficient method using a single base fabric effectively. . In addition, in this manufacturing method, the opening portion is opened by the balance between the incision length of the notch provided on the side of the base fabric along the bent portion of the base fabric and the extension length of the portion distribution extending in the rectangular shape. It is easy to adjust the degree, that is, to adjust the internal pressure when the airbag is inflated.

  According to a seventh aspect of the present invention, in the airbag manufacturing method according to the sixth aspect of the present invention, the incision length of the notch on the side provided along the bent portion of the base fabric serving as the opening is the rectangular shape. The gist is to make the length obtained by adding the diameter of the harness to be derived to the extension length of the part distribution to be extended.

  In such a manufacturing method, as described above, when the airbag is inflated through the balance between the incision length of the notch on the side provided along the bent portion of the base fabric serving as the opening and the extension length of the portion distribution extending in the rectangular shape. In particular, as in the above manufacturing method, the incision length is set to a length obtained by adding the diameter of the harness to the extension length of the portion distribution extending in the rectangular shape. A decrease in internal pressure during expansion can be suitably suppressed.

  According to an eighth aspect of the present invention, in the airbag manufacturing method according to the sixth aspect, an incision length of a notch on a side provided along the bent portion of the base fabric serving as the opening is the rectangular shape. The gist is to make the length corresponding to the extension length of the part distribution to be extended.

  According to such a manufacturing method, when the partial distribution is turned back at the above-described boundary line, the end portion located on the harness side of the partial distribution covers a part of the harness together. Therefore, by manufacturing the airbag in this way, it is possible to further reduce the gap between the portion distribution and the harness, and further promote the effect of suppressing the decrease in internal pressure when the airbag is inflated. .

  According to the airbag apparatus and the manufacturing method thereof of the present invention, it is easy to adjust the opening degree of the opening for leading out the harness formed in the airbag while having a simple structure, and it is preferable to reduce the internal pressure of the airbag. It becomes possible to suppress.

  Hereinafter, an embodiment in which an airbag device according to the present invention is embodied as a side airbag device will be described with reference to FIGS. In the following description, the forward direction of the vehicle will be described as the front (front of the vehicle), and the reverse direction of the vehicle will be described as the rear (rear of the vehicle). Further, in the following description, the vertical direction is the vertical direction of the vehicle, and the horizontal direction is the vehicle width direction of the vehicle, which coincides with the horizontal direction during forward movement.

  FIG. 1 is a side view showing a state in which an airbag of a side airbag device is inflated and deployed in a vehicle compartment together with a seat and a passenger seated on the seat. FIG. 2 is a perspective view showing the airbag in a deployed state.

  As shown in FIG. 1, a seat 10 and a backrest portion 11 are provided in the vehicle interior, and a side airbag device 20 is housed and installed on the side of the backrest portion 11. The side airbag device 20 is seated on the seat 10 by injecting gas from the inflator 21 into the airbag 22 when the impact detection sensor (not shown) detects an impact on the side (not shown) of the vehicle. The airbag 22 is configured to be inflated and deployed between a passenger C and a side wall (not shown) of the vehicle. By inflating and deploying the airbag 22 in such a manner, the contact between the occupant P and the side wall portion is suppressed, and the impact on the occupant P is also reduced. Hereinafter, a specific configuration of the side airbag device 20 will be described.

  As shown in FIG. 2, in the side airbag device 20, the airbag 22 is composed of a single base fabric 22 a, and the base fabric 22 a is folded in two at a folding portion 23 and formed into a bag shape. Yes. That is, the base fabric 22a of the airbag 22 is line symmetric with respect to the bent portion 23 as an axis of symmetry. And the base fabric 22a of the airbag 22 is sewn along the outer periphery in the state folded in half.

  In addition, an inflator 21 serving as a gas generation source is provided inside the airbag 22 thus formed in a bag shape so as to be wrapped along the bent portion 23. As is well known, the inflator 21 is made of a cylindrical member and contains a gas generating agent therein. The gas generating agent contained therein generates high-pressure gas based on ignition of a spark plug (not shown). The generated gas is ejected from the inflator 21 into the airbag 22. Further, a pair of fixing bolts 21b are provided on the side surface 21a of the cylindrical body of the inflator 21, respectively. The fixing bolt 21b is fastened by a nut at a predetermined position in the backrest portion 11 while being inserted into a bolt hole 22c formed at a corresponding position of the airbag 22.

  On the other hand, a harness 24 serving as a drive signal transmission wiring for operating the spark plug is extended from the end of the cylindrical body of the inflator 21, and the harness 24 extends along the bent portion 23 of the airbag 22. The air bag 22 is led out from a predetermined position of the formed opening 25. This predetermined position is an end portion of the opening portion 25 near the inflator 21, and the remaining portion of the opening portion 25 is closed by a cloth piece 26 sewn together with the base cloth 22a so as to cover the end portion. And in this embodiment, this cloth piece 26 consists of part distribution previously extended and formed as a part of base fabric 22a, and the end part 26a located in the harness 24 side was derived | led-out from the opening part 25. It is provided in a manner that matches the side surface of The cloth piece 26 is stitched together with the base cloth 22a by a fixing seam 27 formed along the outer peripheral edge of the base cloth 22a folded in half. By providing the cloth piece 26 in this manner, the outflow of gas from the opening 25 can be suppressed, and the decrease in the internal pressure when the airbag 22 is inflated can be suitably suppressed. Become. Incidentally, the fixing seam 27 is also used as a seam for sewing the outer peripheral edges of the folded base fabric 22a.

  Next, an example of a method for manufacturing such an airbag device will be described with reference to FIG. 3A to 3D show the manufacturing process of the airbag device in the order of the steps.

  When manufacturing such an airbag device, first, as shown in FIG. 3 (a), an extension line of the folded portion 23 is formed on one side in the extending direction of the folded portion 23 of one base cloth 22a to be folded in two. The base cloth 22a serving as the airbag 22 is cut out so as to provide a part distribution of the cloth piece 26 extending in a rectangular shape having a line symmetry with respect to the axis 23a. Next, along the boundary line 28 with one side of the extension line 23a of the bent part 23 of the part distribution as the cloth piece 26 with respect to the base cloth 22a cut into a convex shape in this way, and An L-shaped notch 29 is provided along the bent portion 23 on the side where the portion distribution from the boundary line 28 to the cloth piece 26 is provided. In this example, the notch length L1 of the portion 29a along the bent portion 23 of the notch 29 is set to the extension length L2 of the portion distribution of the cloth piece 26 extending in a rectangular shape. The length is the sum of the diameter.

  After that, the inflator 21 serving as a gas generation source is installed along the bent portion 23 of the base fabric 22a, and the portion 29a of the cut 29 provided along the bent portion 23 is used as the opening 25. The harness 24 connected to the inflator 21 is led out from the end of the portion 25 near the inflator 21. Then, in this state, the base fabric 22a on the side where the inflator 21 is not installed is bent around the bent portion 23, and folded in such a manner as to wrap the inflator 21, so that the state shown in FIG.

  After the state shown in FIG. 3 (b) is obtained, the base cloth 22a is wrapped by the distribution of the cloth pieces 26 left by folding the base cloth 22a, and the base cloth 22a is further wrapped. Are sequentially folded in the manner shown in FIG.

3 (d), the outer peripheral edge of the base fabric 22a is stitched together with the fixing seam 27 together with the part distribution.
By manufacturing the airbag device through such steps, the airbag 22 can be easily suppressed as described above by a highly efficient method using the single base fabric 22a effectively. In addition, it can be manufactured at low cost. In addition, in this manufacturing method, the cut length L1 of the portion 29a of the cut 29 on the side provided along the bent portion 23 of the base fabric 22a serving as the opening 25 and the extension length of the portion distribution extended as the cloth piece 26 are provided. It is easy to adjust the opening of the opening 25 by balancing with L2, that is, to adjust the internal pressure when the airbag 22 is inflated.

As described above, according to the side airbag device and the manufacturing method thereof according to the present embodiment, the following effects can be obtained.
(1) The harness 24 is led out from the end of the opening 25 near the inflator 21, and the remaining portion of the opening 25 is closed with a cloth piece 26 stitched to the base fabric 22a so as to cover the harness 25. It was decided. For this reason, it is not necessary to sew the base fabrics 22a to the vicinity of the harness 24 in order to close the opening 25, and the reduction of the internal pressure of the airbag 22 can be suitably suppressed with a simple structure.

  (2) The cloth piece 26 is formed in advance as a part of the base cloth 22a from the base cloth 22a to the side where the opening 25 is formed, and is folded back and stitched to the base cloth 22a. did. By effectively using the single base fabric 22a in this way, simplification of parts management and simplification of the structure of the airbag 22 are achieved.

  (3) When the single base fabric 22a is effectively used, the manufacturing method illustrated in FIG. 3 is adopted. This makes it possible to easily and inexpensively manufacture the airbag 22 capable of suppressing a decrease in internal pressure by an extremely efficient method.

  (4) Moreover, according to the manufacturing method illustrated in FIG. 3, the cut length L1 of the portion 29a of the cut 29 on the side provided along the bent portion 23 of the base fabric 22a serving as the opening 25 is extended in a rectangular shape. Therefore, it is easy to adjust the opening of the opening 25 by balancing with the extended length L2 of the portion distribution of the cloth piece 26, that is, adjusting the internal pressure when the airbag 22 is inflated.

  (5) As illustrated in FIG. 3, the base cloth 22 a having a part distribution as the cloth piece 26 is stitched with the fixing seam 27 common to the stitching of the outer peripheral edges of the base cloth 22 a. This simplifies the process of fixing the cloth piece 26 (part distribution), and further improves the manufacturing efficiency when a single base cloth is effectively used.

In addition, the said embodiment can also be implemented with the following forms which changed this suitably.
In the above embodiment, the cloth piece 26 is stitched to the base cloth 22a by the fixing seam 27 common to the outer peripheral edges of the base cloth 22a. The following may be used.

  For example, as shown in FIG. 4A, first, a base fabric 22a processed into a shape similar to that of the above embodiment is bent around the bent portion 23, and its outer peripheral edge is stitched. Next, a hand is inserted from the portion 29a of the notch 29 on the side provided along the bent portion 23 of the base fabric 22a having the stitched base fabric 22a as the opening 25, and the inflator 21 is formed in a bag shape from the same portion 29a. It inserts in the obtained base fabric 22a, and it is set as the state shown in FIG.4 (b). In this state, the seam 27a for sewing the outer peripheral edge of the base fabric 22a is formed on a line indicated by a two-dot chain line in the figure, but is not visible from the table because it is located on the back side of the base fabric 22a. ing. After the state shown in FIG. 4 (b) is obtained, the base cloth 22a is wrapped around by the distribution of the cloth pieces 26 left by folding the base cloth 22a, and the base cloth 22a is further wrapped. Are sequentially folded in the manner shown in FIG. Then, after the partial distribution to be the cloth piece 26 is folded in the manner shown in FIG. 4D, the partial distribution is stitched to the base fabric 22a by the fixing seam 27b. Incidentally, the fixing seam 27b is provided in such a manner that it overlaps or intersects with the seam 27a for sewing the outer peripheral edge of the base fabric 22a.

  A manufacturing method as shown in FIG. 5 is also possible. That is, as shown in FIG. 5A, first, an inflator 21 serving as a gas generation source is installed along the bent portion 23 of the base fabric 22a processed into the same shape as that of the above embodiment. Next, the harness 24 connected to the inflator 21 is led out from the end portion of the opening 25 near the inflator 21 with the portion 29a of the cut 29 on the side provided along the bent portion 23 as the opening 25. In this state, the base fabric 22a on the side where the inflator 21 is not installed is folded in such a manner that the inflator 21 is wrapped around the folding portion 23, and the outer peripheral edge of the base fabric 22a is stitched with a seam 27a. After the state shown in FIG. 5 (b) is obtained, the base cloth 22a is wrapped by the distribution of the cloth pieces 26 left by folding the base cloth 22a. Are sequentially folded in the manner shown in FIG. And after folding the part distribution used as the said cloth piece 26 in the aspect shown in FIG.5 (d), this part distribution is stitch | sutured with respect to the base fabric 22a by the fixing seam 27b. Incidentally, the fixing seam 27b is provided in such a manner that it overlaps or intersects with the seam 27a for sewing the outer peripheral edge of the base fabric 22a. In this case, the inflator 21 may be inserted through the bag-shaped base cloth 22a after first sewing the outer peripheral edge of the base cloth 22a.

  Therefore, in these examples, a seam 27a for stitching the outer peripheral edge of the base fabric 22a and a fixing seam 27b different from the seam 27a for fixing the distribution of the cloth pieces 26 are used. Also, the effects according to the above (1) to (4) can be achieved.

-The aspect of the cut 29 formed in the base fabric 22a is not limited to that of the above embodiment, and may be, for example, an inverted L shape.
In the above-described embodiment, the distribution of the portion distribution in which the cut length L1 of the portion 29a of the cut 29 on the side provided along the bent portion 23 of the base fabric 22a serving as the opening 25 is a rectangular piece of cloth 26 is provided. Although the length obtained by adding the diameter of the harness 24 to the extension length L2, the length L1 may be set to be equal to the extension length L2 of the partial distribution, for example. This makes it possible to further reduce the gap between the opening 25 and the harness 24 when the portion distribution of the cloth piece 26 is stitched to the base fabric 22a, and thus the internal pressure when the airbag 22 is inflated is reduced. This can further enhance the suppression effect. However, as shown in the effect (4) above, it is easy to adjust the internal pressure when the airbag 22 is inflated through the balance of the lengths L1 and L2, and this is practically required depending on the structure of the vehicle. These relationships may be set according to the internal pressure level of the airbag to be used.

  -In the said embodiment, although it was decided to employ | adopt the part distribution extended and formed from the base fabric 22a as the cloth piece 26, it replaces with this and prepares a cloth piece separate from a base cloth, and this is used. It is good also as a structure stitch | sutured with respect to a base fabric so that the said opening part 25 may be covered.

  In the above embodiment, a single cloth is used as the base cloth 22a constituting the airbag 22. However, it is also possible to use a cloth obtained by integrally stitching a pair of base cloths having the same shape. In this case, a portion where each of the pair of base fabrics is not sewn can be used as the opening 25.

  In the above-described embodiment, an example in which the airbag device according to the present invention is embodied as a side airbag device has been described. However, the scope of application is arbitrary, and for example, a knee that reduces the impact on the occupant's knees. This can also be embodied as an airbag device or the like.

The side view which shows the expansion | deployment aspect of the airbag in a vehicle interior about one Embodiment which actualized the airbag apparatus concerning this invention in the side airbag apparatus. The perspective view which shows the perspective structure in the airbag deployment state of the airbag apparatus of the embodiment. (A)-(d) is a top view which shows the manufacture procedure of the airbag apparatus of the embodiment. (A)-(d) is a top view which shows the modification of the manufacturing procedure of an airbag apparatus. (A)-(d) is a top view which shows the modification of the manufacturing procedure of an airbag apparatus. The perspective view which shows the perspective structure in the airbag deployment state of the conventional airbag apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 21 ... Inflator, 22 ... Air bag, 22a ... Base fabric, 23 ... Bending part, 24 ... Harness, 25 ... Opening part, 26 ... Cloth piece (part distribution), 28 ... Borderline, 29 ... Cutting.

Claims (8)

A harness connected to the inflator through an opening formed along the bent portion of the airbag, in which an inflator serving as a gas generation source is wrapped along the folded portion of the airbag that is folded and sewn together. In the airbag device from which is derived,
Together with the harness is derived from the end of the inflator side of the said opening, the remaining portion of the opening, Ri Na blocked by stitched cloth pieces to the base fabric so as to cover the ,
The airbag device , wherein the cloth piece is stitched to the base fabric in such a manner as to cover at least part of the end portion of the opening close to the inflator from which the harness is led out . A harness connected to the inflator through an opening formed along the bent portion of the airbag, in which an inflator serving as a gas generation source is wrapped along the folded portion of the airbag that is folded and sewn together. In the airbag device from which is derived,
The harness is led out from the end of the opening near the inflator, and the remaining part of the opening is closed by a piece of cloth sewn against the base cloth so as to cover the opening,
The length of the opening along the bent portion is equal to the length of the cloth piece in the bent portion direction plus the diameter of the harness.
An airbag device characterized by that . The cloth piece has a part distribution which is previously extended from the base cloth to the side where the opening is formed as a part of the base cloth, and the part distribution is folded and stitched to the base cloth. The airbag apparatus according to claim 1 or 2. A harness connected to the inflator through an opening formed along the bent portion of the airbag, in which an inflator serving as a gas generation source is wrapped along the folded portion of the airbag that is folded and sewn together. In the airbag device from which is derived,
The harness is led out from the end of the opening near the inflator, and the remaining part of the opening is closed by a piece of cloth sewn against the base cloth so as to cover the opening,
The cloth piece is made of a part distribution that extends in advance from the base cloth to the side where the opening is formed as a part of the base cloth, and the part distribution is folded and stitched to the base cloth. ,
The part distribution is formed to extend in one of the extending directions of the bent part of the base fabric into a rectangular shape that is symmetrical with respect to the extension line of the bent part, and the base cloth has this part distribution. An L-shaped incision is provided along a boundary line with one side of the bent part and a bent part on the side where the distribution of the same part is provided from the boundary line. A harness connected to the inflator with the cuts provided along the part as the opening is led out, and the distribution of the part that is left after the base fabric is folded in two is sequentially folded into the base fabric side and the cloth piece. Be done
An airbag device characterized by that . The airbag apparatus according to claim 3 or 4, wherein stitching of the portion distribution with respect to the base fabric is performed in common with stitching of an outer peripheral edge of the base fabric. A part distribution extending in a rectangular shape that is symmetrical with respect to the extension line of the bent portion is provided on one side in the extending direction of the bent portion of the sheet of fabric that is folded in half so that the whole becomes a convex shape. Cutting out a base fabric to be used as an airbag;
With respect to the base fabric cut out in this convex shape, along the boundary line with one side of the bent portion of the portion distribution as a boundary, and on the bent portion on the side where the same portion distribution is provided from the boundary line Providing an L-shaped notch along,
An inflator serving as a gas generation source is installed along the bent portion of the base fabric, and a notch on the side provided along the bent portion is used as an opening to connect to the inflator from an end of the opening close to the inflator A step of deriving the harness that has been made,
Folding the base fabric in half so as to wrap the installed inflator;
A step of successively folding the base fabric so as to wrap the base fabric by the partial distribution remaining by folding the base fabric in half;
With the folded part distribution, the step of sewing the outer peripheral edge of the base fabric,
An airbag manufacturing method comprising: The cut length of the cut provided on the side of the base fabric along the bent portion as the opening is a length obtained by adding the diameter of the harness to be derived to the extension length of the portion distribution extending in the rectangular shape. The manufacturing method of the airbag of Claim 6. The air according to claim 6, wherein an incision length of an incision on a side provided along the bent portion of the base fabric serving as the opening is a length corresponding to an extension length of a portion distribution extending in the rectangular shape. Bag manufacturing method.

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