JP2016179719A - Airbag body for vehicle and airbag device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an airbag body for a vehicle which can homogenize a folding operation or a folded state without depending on visual confirmation, and by which an airbag can be manufactured by proper folding, and an airbag device for a vehicle.SOLUTION: A side airbag 1 include: a folded region F which is folded; an accommodation region G for accommodating the folded region therein; and a boundary line L which is located at a boundary between the folded region and the accommodation region, and appears as a crest part when the folding region is folded into a trough shape, and is pushed into a depth side of the accommodation region. A temporarily-stitched portion 5 which is fractural by the inflation of the side airbag, and connected by stitching is formed at the folded region, and the temporarily-stitched portion becomes a tip of the folded region progressing to the depth side of the accommodation region when the folded region is accommodated in the accommodation region, and is located at the deepest part of the accommodation region. A push-in depth of the folded region which is pushed into the accommodation region is regulated by a separation distance between the temporarily-stitched portion and the boundary line.SELECTED DRAWING: Figure 4

Description

  The present invention can be applied to any airbag, and can be folded or homogenized without relying on visual observation, and the airbag can be manufactured with proper folding. Therefore, it is possible to prevent the folding portion from interfering with the inflator at the place where the vehicle is mounted and also to ensure proper expansion and expansion of the airbag, and it is easy to configure with a very simple structure. The present invention relates to a vehicle airbag body and a vehicle airbag apparatus.

  With respect to a vehicle airbag body or a vehicle airbag device, for example, as disclosed in Patent Documents 1 to 3, it is known that various improvements are made by folding the airbag or performing temporary sewing. The “side impact airbag” of Patent Document 1 is formed by forming a bag from a main body at a portion facing the occupant's abdomen and an upper bulging portion at a portion facing the occupant's chest, and the length of the upper bulging portion. When the bag is deployed by deleting the direction tip and shortening the joint part of the gas introduction part to the inflator, thereby shortening the length of the upper bulge part compared to the length of the main body The width of the upper bulge is narrower than the width of the main body, reducing the impact on the chest of the occupant when the bag is deployed, and the seating position of the body and the occupant without excessively impacting the occupant The bag is surely deployed in a narrow gap between the two. In Patent Document 1, it is also possible to jointly sew the upper edge of the main body of the portion where the upper bulging portion is folded inside the main body by sewing to be joined as a sewing portion (separated by a predetermined pressure or more). As a result of joining the upper edge of the main body, the upward diffusion of the gas ejected from the inflator when the bag is deployed is suppressed, and the gas ejected from the inflator is ejected toward the main body portion on the front side. ing.

  In the “airbag device” of Patent Document 2, in order to fold an airbag, an outer region of a triangular line segment is first folded into the airbag to form a triangular primary folded body. Next, a region outside the three line segments of the triangular primary fold is folded inward of the primary fold to form a hexagonal secondary fold. The hexagonal secondary folds are folded inward from the six vertices in the vicinity of the six apexes to form a dodecagonal tertiary fold. The tertiary folded body is attached to a retainer together with a gas generator, covered with a module cover, and the module cover is attached to the retainer to form an airbag device. In Patent Document 2, the folded portion is sewn to the airbag with a tear seam. This tear seam is intended for temporary fastening having a strength enough to cut when the airbag is inflated.

  In “Side air bag unit and manufacturing method thereof / Seitengassackeinheit und Verfahren zu ihrer Herstellung” of Patent Document 3, a temporary sewing portion is formed so that a folded portion does not approach an inflator accommodating region too much.

Japanese Patent Laid-Open No. 9-272397 JP 2002-370598 A German Patent Application Publication No. 10 2013 001 337 A1

  In the folding operation of the airbag, the folding line is displayed on the airbag with a marker or the like so that the standard of folding can be easily understood visually. However, if the folding line indicated by the marker is folded into a position where it is difficult to see due to the folding, it will no longer be possible to continue folding, and the folded state of the manufactured airbag will vary, providing a uniform performance airbag Sometimes it was difficult to do.

  When such an airbag is mounted on a vehicle, it is conceivable that the deployment and inflating action of the airbag cannot be ensured properly if a folded portion of the airbag interferes with an unintended vehicle body.

  An inflator is housed inside the airbag. If the folding part may interfere with the inflator in a positional manner, it is conceivable that the airbag inflating and inflating action cannot be properly secured as described above.

  The present invention was devised in view of the above-described conventional problems, and can be applied to any airbag, so that the folding operation or the folding state can be homogenized without relying on visual observation. Thus, the airbag can be manufactured with proper folding, and therefore, the folding portion can be prevented from interfering with the place where the vehicle is mounted and also with respect to the inflator, and the airbag can be properly deployed and inflated. It is an object of the present invention to provide a vehicle airbag body and a vehicle airbag device that can be easily secured with an extremely simple structure.

  The airbag body for a vehicle according to the present invention includes a folding region in which an airbag that is deployed and inflated by an inflator gas is folded, a storage region for storing the folded folding region therein, and these folding regions. And a boundary line that appears as a mountain fold when the folding region is folded into a valley and pushed into the inner side of the storage region, and the airbag is inflated in the folding region. A temporary stitching portion is formed by joining a pair of bag surfaces that are sometimes spaced apart by sewing that can be broken by the expansion, and the temporary stitching portion is stored in the storage region when the folding region is stored in the storage region. It becomes the tip of the convolution area that goes to the inside of the storage area, is located at the deepest part of the storage area, and the separation distance between the temporary stitching portion and the boundary line Wherein the indentation depth of the convolution region pushed into pay area is defined.

  When the folding area is stored in the storage area, it is preferable that the folding area has a convex shape toward the inside of the storage area, and the temporary stitching portion is located at the tip of the convex shape. It is desirable that the pair of bag surfaces have a positional relationship facing each other when the airbag is deployed and inflated.

  The temporary stitching portion is preferably formed in a straight line substantially parallel to the boundary line. When the folding area is stored in the storage area, it is preferable that the folding area is positioned outside an inflator installation area set in the airbag.

  A vehicle airbag device according to the present invention is a side airbag in which the above-described vehicle airbag body is accommodated in a seat and is deployed and inflated from the seat side toward the vehicle front side between the occupant and the vehicle. It is characterized by that.

  In the vehicle airbag device according to the present invention, the above-described vehicle airbag body is mounted and supported near the roof side rail, and is deployed and inflated from the roof side rail side to the vehicle lower side between the occupant and the vehicle. It is a curtain airbag to be used.

  The vehicle airbag body and the vehicle airbag device according to the present invention can be applied to any airbag and homogenize the folding operation or the folding state without relying on visual observation. The airbag can be manufactured with proper folding, and the folding part can be prevented from interfering with the inflator at the place where the vehicle is mounted, and the airbag can be deployed and inflated properly. In addition, it can be easily configured with a very simple structure.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view illustrating a preferred embodiment of a vehicle airbag body and a vehicle airbag device according to the present invention. It is a schematic perspective view which shows the stage of the convolution operation initial stage with respect to the airbag body for vehicles shown in FIG. FIG. 3 is a schematic perspective view showing a convolution operation for a vehicle airbag body subsequent to FIG. 2 and an initial stage of a storing operation parallel to the folding operation. FIG. 4 is a schematic perspective view illustrating a stage of completion of the storage operation of the vehicle airbag body subsequent to FIG. 3. It is explanatory drawing explaining the form at the time of mounting the airbag body for vehicles shown in FIG. 1 on a vehicle. FIG. 6A is a diagram for explaining a modification of the vehicle airbag body and the vehicle airbag device according to the present invention, and FIG. 6A is a side view showing the entire curtain airbag before the folding operation, and FIG. FIG. 6A is an enlarged view of a portion X in FIG. 6A, and FIG. 6C is a side view showing the entire curtain airbag when the storage operation is completed.

  Hereinafter, a preferred embodiment of a vehicle airbag body and a vehicle airbag device according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an explanatory view for explaining a vehicle airbag body and a vehicle airbag apparatus according to the present embodiment, in which FIG. 1 (A) is a front view and FIG. 1 (B) is in FIG. 1 (A). FIG. 2 is a schematic perspective view showing the initial stage of the folding operation for the vehicle airbag body shown in FIG. 1, and FIG. 3 is a view for the vehicle airbag body continued from FIG. FIG. 4 is a schematic perspective view showing the stage of the folding operation and the initial stage of the storing operation parallel to this, FIG. 4 is a schematic perspective view showing the stage of the storing operation completion of the vehicle airbag body following FIG. 3, and FIG. It is explanatory drawing explaining the form at the time of mounting the shown vehicle airbag body to a vehicle, Comprising: FIG. 5 (A) is a front view, FIG.5 (B) is FIG. It is arrow sectional drawing.

  As is well known, an airbag for protecting an occupant mounted on a vehicle is inflated by introducing inflator gas therein. In the present embodiment, a side airbag will be described as an example. As is well known, the side airbag is housed inside the seat back of the seat, and between the occupant sitting on the seat and the vehicle part such as the door and side window located on the side of the occupant, The vehicle is deployed and inflated from the seat back side toward the front in the vehicle front-rear direction.

  As shown in FIG. 1, the side airbag 1 is formed by joining two identically shaped base fabrics by sewing or the like along the outer peripheral edge, or folding back a single base fabric as illustrated. Are joined together by sewing S1 or the like along the overlapping peripheral edges to form a hollow bag having front and back surfaces. The base fabric forms a pair of front and back bag surfaces 1 a of the side airbag 1.

  The base fabric is formed of a flexible material, and the side airbag 1 itself can be folded and folded freely. A vent hole 2 is formed in the side airbag 1. An inflator installation region 3 occupied by an inflator that injects inflator gas is set inside the side airbag 1.

  In order to form the vehicle airbag body and the side airbag 1 of the vehicle airbag device according to the present embodiment into a form when mounted on a vehicle, a folded region F that is folded and a folded region F that is folded are used. Is configured to include a storage region G for storing the inside.

  Specifically, referring to the front view shown in FIG. 1, the upper portion of the side airbag 1 (not necessarily the upper portion in the vertical direction of the vehicle) is a convolution region F, and the lower portion of the side airbag 1 ( The storage area G is not necessarily the lower part in the vertical direction of the vehicle.

  Specifically, the storage area G separates the pair of front and back bag surfaces 1a of the side airbag 1 (see the alternate long and short dash line in FIG. Storage by so-called tuck-in, which is used for storage by pushing into the storage area G, is enabled.

  The convolution area F may be set to any size and range as long as it can be accommodated in the storage area G. The storage area G may be set to any size and range as long as the convolution area F can be stored inside. As shown in FIG. 4, the storage area G appears on the front side of the side airbag 1, and the convolution area F is hidden behind the storage area G.

  The side airbag 1 is located at the boundary between the convolution region F and the storage region G, and includes a boundary line L (denoted by-●-in the drawing) that divides them. The boundary line L need not be marked with a marker. As described above, since the storage area G appears on the front side of the side airbag 1 and the convolution area F is hidden behind the storage area G, the boundary line L is visible from the front side of the side airbag 1. is there.

  In addition, since the folding region F is pushed into the storage region G and stored in a tuck-in manner, the boundary line L appears as a mountain fold on the front side of the side airbag 1. Thereby, the convolution area | region F is made into the valley fold which goes into the storage area G inside.

  In the folding region F, a pair of front and back bag surfaces 1a that are spaced apart when the side airbag 1 is inflated are joined together by sewing to form a temporary stitching portion 5 that is a main portion 4 of the folding operation. The temporary stitching portion 5 is formed with a strength that can be broken by the inflation of the side airbag 1.

  Specifically, the temporary stitching portion 5 joins a pair of front and back bag surfaces 1a facing each other in a state in which the side airbag 1 is extended flat, and the pair of front and back bag surfaces 1a are side airbags. At the time of 1 expansion | swelling expansion | swelling, it is set as the positional relationship which mutually faces. Thereby, when the side airbag 1 is inflated, the shape of the side airbag 1 is not distorted, and the temporary stitching portion 5 is broken efficiently.

  The main portion 4 formed by the temporary stitching portion 5 is a portion where all the folding lines of the folding are gathered during the folding operation. In other words, as long as all of the fold lines start from the main part 4 (the temporary stitching part 5), the fold line may be set in any way and folded in any way. In FIG. 1 (A) and FIG. 5 (A), an example of a folding line when the folding region F is folded is indicated by the notation “− ◯ −”.

  As shown in FIG. 5, when the folding area F is stored in the storage area G, the main part 4 (temporary stitching part 5) where the fold lines are concentrated is located at the tip of the folding area F toward the inner back of the storage area G. It is pushed into the storage area G so as to be positioned, and the main part 4 (temporary stitching part 5) is positioned at the deepest part of the storage area G. In the present embodiment, when the folding area F is stored in the storage area G, the folding area F is convex toward the inner side of the storage area G due to the setting of the folding line.

  In the illustrated example, the convex shape is downward and has a substantially triangular shape, and the main portion 4 (temporary stitching portion 5) is located at the tip which becomes the apex angle portion. In other words, the convolution region F is stored in the storage region G in a tapered manner downward.

  Further, the separation distance D (see FIG. 1) between the main portion 4 (the temporary stitching portion 5) and the boundary line L defines and limits the pushing depth of the folding region F pushed into the storage region G. That is, if the formation position of the main part 4 (temporary stitching part 5) and the setting position of the boundary line L are determined, the separation distance D between the two is determined in the side airbag 1, and the main part has a depth exceeding the separation distance D. 4 (temporary stitching portion 5) is prevented from being pushed deeply into the storage area G.

  Accordingly, when the operation of storing the folding region F in the storage region G is performed, the position where the main portion 4 (temporary stitching portion 5) cannot be pushed is reached, so that the structure of the side airbag 1 in the present embodiment is reduced. It is known that the necessary operation has been completed. Thereby, in the side airbag 1, the range occupied by the convolution region F in the storage region G is restricted.

  Therefore, a situation in which the convolution region F interferes with an unintended vehicle body part or positionally interferes with the inflator can be avoided. In other words, the convolution region F is positioned outside the inflator installation region 3 when stored in the storage region G. The same applies to the vent hole 2.

  In this embodiment, the temporary stitching portion 5 is formed in a straight line substantially parallel to the mountain fold boundary line L. By forming in this way, the convolution region F that is convoluted starting from the main portion 4 (temporary stitching portion 5) is pushed into the storage region G divided by the boundary line L in an orderly manner. The length dimension of the temporary stitching portion 5 is appropriately set according to the size and form of the folding region F so as to be suitable for the folding operation and storage in the storage region G.

  The folding region F can be stored in the storage region G depending on the position of the boundary line L and the position and length of the main portion 4 (temporary stitching portion 5) with respect to the outer dimensions of the side airbag 1 when flattened. It is possible to position it outside the installation region 3 of the inflator when it is stored in the housing. As described above, if the convolution region F is a tapered shape, the inflator installation region 3 is more appropriately secured.

  In the illustrated example, a fold line is shown at the lower end portion of the side airbag 1 so that the lower end portion is tucked in and folded between the pair of bag surfaces 1a.

  Next, how the vehicle airbag body according to this embodiment is folded will be described with reference to the drawings. FIG. 1 shows the side airbag 1 before the folding operation and the storing operation. A convolution region F and a storage region G are separated by a boundary line L. In addition, a main portion 4 is formed by a temporary stitching portion 5 in the folding region F.

  As shown in FIG. 2, when the convolution operation is started, convolution mainly starting from the main portion 4 (temporary stitching portion 5) is performed in the initial stage. In conjunction with the folding operation, an operation of pulling apart the pair of front and back bag surfaces 1a of the side airbag 1 is performed, and a portion of the folding region F in the vicinity of the boundary line L starts to be pushed into the storage region G by tuck-in.

  Subsequently, as shown in FIG. 3, the convolution operation is further advanced, and in parallel with this, pushing of the convolution region F into the storage region G by tuck-in is advanced. After that, as shown in FIG. 4, the boundary line L is folded in a mountain, and the entire folding area F is stored in the storage area G by valley folding by tuck-in.

  FIG. 5 shows a form when the folding operation and the storing operation are completed and the vehicle airbag body is mounted on the vehicle. As described above, when the convolution region F is stored in the storage region G, the main portion 4 (temporary stitching portion 5) becomes the front end of the convolution region F toward the inside of the storage region G, and is the deepest part of the storage region G. Located in. The separation distance D between the main portion 4 (temporary stitching portion 5) and the boundary line L defines the pushing depth of the convolution region F pushed into the storage region G.

  When the convolution region F is stored in the storage region G, the convolution region F has a convex shape toward the inside of the storage region G, and the main portion 4 (temporary stitching portion 5) is located at the tip of the convex shape. The folding region F is positioned outside the inflator installation region 3 set in the side airbag 1 when stored in the storage region G.

  When the side airbag 1 is deployed and inflated, the temporary stitching portion 5 is broken, and the occupant can be protected by a normal deployment and expansion action without the temporary stitching portion 5.

  In the vehicle airbag body and the vehicle airbag apparatus according to the present embodiment described above, the side airbag 1 that is deployed and inflated by the inflator gas includes the folding region F that is folded and the folding that is folded. When the folding area F is valley-folded and pushed into the interior of the storage area G, the mountain-folding is performed. The folding line F includes a boundary line L that appears as a pair of bag surfaces 1a that are spaced apart when the side airbag 1 is inflated, and is joined by sewing that can be broken by the inflation. 4 is formed. When the folding region F is stored in the storage region G, the main portion 4 (temporary stitching portion 5) is folded toward the inner side of the storage region G. Depth of the folding region F that is located at the tip of the folding region F and is located at the deepest part of the storage region G, and the separation distance D between the main portion 4 (temporary stitching portion 5) and the boundary line L is pushed into the storage region G Since the main portion 4 (temporary stitching portion 5) is formed with respect to the boundary line L, the folding operation or the folding state can be homogenized without relying on visual observation. The bag 1 can be manufactured with proper folding, and the folding area F can be prevented from interfering with the inflator at the place where the vehicle is mounted, and thus the folding and position of the folding area F are stable. As a result, the expansion and expansion action of the side airbag 1 can be properly and stabilized, and the above-described effects can be achieved easily with an extremely simple structure. Rukoto can. Moreover, a high expansion | swelling expansion speed can be ensured by the part folded in by tack-in.

  Since the separation distance D between the main portion 4 (temporary stitching portion 5) and the boundary line L limits the pushing depth of the convolution region F pushed into the storage region G, the main portion 4 has a depth exceeding the separation distance D. It is possible to prevent the (temporary stitching portion 5) from being pushed deep into the storage region G. Accordingly, when the operation of storing the folding region F into the storage region G is performed, the necessary operation from the structure of the side airbag 1 is reached by reaching the position where the main portion 4 (temporary stitching portion 5) cannot be pushed. Can be known to have completed. That is, the convolution region F can be accurately set with respect to the storage region G.

  In particular, since the convolution region F is pushed deep inside the storage region G, the convolved convolution region F can be stored in an appropriate position / range in the storage region G even in a situation where it cannot be seen. As described above, in the side airbag 1, the position and range occupied by the convolution region F in the storage region G can be regulated, so that the convolution region F interferes with an unintended vehicle body part or is positioned with the inflator. You can avoid the situation that interferes. Moreover, the work time of folding the side airbag 1 can be shortened.

  When the convolution region F is stored in the storage region G, it is convex toward the inner side of the storage region G, the convex shape is downward, is substantially triangular, and is a major portion at the tip that becomes the apex portion. 4 (temporary stitching portion 5) is positioned, so that the convolution region F can be tapered downward, narrowing the area occupied by the storage region G, and interfering with the inflator installation region 3 and the like. Can be prevented appropriately.

  Since the pair of front and back bag surfaces 1a are in a positional relationship facing each other when the side airbag 1 is deployed and inflated, the shape of the side airbag 1 at the time of inflation is not distorted, and the temporary stitching portion is efficient. 5 can be broken and the side airbag 1 can function appropriately.

  Since the temporary stitching portion 5 forming the main portion 4 is formed in a straight line substantially parallel to the boundary line L, the convolution region F that is folded starting from the main portion 4 (temporary stitching portion 5) is defined as the boundary line L. Can be pushed into the storage area G sorted in order.

  In the above embodiment, the side airbag 1 has been described as an example. However, the vehicle airbag body according to the present invention can be applied to any airbag, such as a curtain airbag or a front airbag. The present invention can also be applied to such a vehicle airbag device.

  FIG. 6 shows a modification of the above embodiment. In this modification, the vehicle airbag body is a curtain airbag, and the above configuration is applied to a chamber located at the rear of the curtain airbag in the vehicle front-rear direction. 6A is a side view showing the entire curtain airbag before the folding operation, FIG. 6B is an enlarged view of a portion X in FIG. 6A, and FIG. 6C is when the storing operation is completed. It is a side view which shows the whole curtain airbag.

  For the chamber portion 6b of the curtain airbag 6 that protrudes rearward in the vehicle front-rear direction, the folding region F, the storage region G for storing the folding region F therein, and these folding regions F and A boundary line L that appears as a mountain fold is set when the folding region F is valley-folded and pushed into the inner side of the storage region G, and is positioned at the boundary of the storage region G. When a pair of bag surfaces 6a that are spaced apart when 6 is inflated are joined together by sewing that can be broken by the expansion, a temporary stitching portion 5 is formed. When the folding region F is stored in the storage region G , Which becomes the tip of the convolution region F toward the inner side of the storage region G, is located at the deepest part of the storage region G, and the storage region G is separated by the separation distance D between the temporary stitching portion 5 and the boundary line L. Indentation depth of depressed are convolution region F is defined.

  Other configurations can be provided in the same manner as in the above embodiment, and can be preferably applied to the curtain airbag 6 as well. Even in such a modification, it is a matter of course that the same operational effects as those of the above-described embodiment can be obtained.

  The vehicle airbag body and the vehicle airbag device described above are preferable examples of the present invention, and other exemplary embodiments can be implemented or performed by various methods. In particular, the present invention is not limited to the detailed shape, size, configuration, and the like of the components shown in the accompanying drawings unless otherwise stated in the present specification. In addition, expressions and terms used in the present specification are for the purpose of explanation, and are not limited thereto unless otherwise specified.

DESCRIPTION OF SYMBOLS 1 Side airbag 1a Bag surface 3 Inflator installation area 5 Temporary stitching part 6 Curtain airbag 6a Bag surface D Separation distance of important part (temporary stitching part) and boundary line F Convolution area G Storage area L Boundary line

Claims (7)

An airbag that is inflated and inflated by an inflator gas is located at a boundary between a folding region to be folded, a storage region for storing the folded folding region therein, and the folding region and the storage region. A boundary line that appears as a mountain fold when the area is folded and pushed into the interior of the storage area,
In the folding region, a pair of bag surfaces that are spaced apart when the airbag is inflated are formed with a temporary stitching portion that is joined by sewing that can be broken by the inflation,
When the folding region is stored in the storage region, the temporary stitching portion becomes the tip of the folding region toward the inner depth of the storage region, and is positioned at the deepest part of the storage region,
The vehicle airbag body according to claim 1, wherein a push-in depth of the folding region pushed into the storage region is defined by a separation distance between the temporary stitching portion and the boundary line.   2. The folding region, when stored in the storage region, has a convex shape toward the inside of the storage region, and the temporary stitching portion is positioned at a tip of the convex shape. An air bag body for vehicles as described in 1.   The vehicle airbag body according to claim 1, wherein the pair of bag surfaces are in a positional relationship facing each other when the airbag is deployed and inflated.   The vehicle airbag body according to any one of claims 1 to 3, wherein the temporary stitching portion is formed in a straight line substantially parallel to the boundary line.   5. The vehicle according to claim 1, wherein the convolution region is positioned outside an installation region of an inflator set in the airbag when stored in the storage region. Airbag body.   The vehicle airbag body according to any one of claims 1 to 5 is a side airbag that is accommodated in a seat and that is deployed and inflated from the seat side toward the vehicle front side between the occupant and the vehicle. An air bag device for vehicles.   The vehicle airbag body according to any one of claims 1 to 5 is attached and supported near the roof side rail, and is deployed and inflated from the roof side rail side toward the vehicle lower side between the occupant and the vehicle. A vehicle airbag device, characterized in that it is a curtain airbag.

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