JP5207429B2 - Airbag device - Google Patents

Description

The present invention relates to Rue airbag device is installed in a vehicle such as an automobile.

  In general, an airbag device includes an airbag that catches the occupant's body, a gas generator that is accommodated in the airbag, and inflates the airbag by injecting gas. One such airbag device is seated on a seat in the passenger compartment when an impact of a predetermined value or more is applied to the body side portion of the vehicle, such as during a side collision of a vehicle such as an automobile or when the vehicle rolls over. There is a side impact airbag device that generates gas by a gas generator between an occupant and a body side portion, inflates the side impact airbag to the occupant side portion, and restrains the occupant's body (for example, a patent) Reference 1 etc.).

JP 2005-029073 A

  The airbag of the conventional side airbag device described above is configured as a bag body by stitching the peripheral portions of a plurality of base fabrics cut into a predetermined shape. However, if the airbag is configured as a bag body by stitching the base fabric in this manner, a complicated stitching process is required at the time of manufacture, which is troublesome.

An object of the present invention is to provide a Rue airbag device can be significantly reduced labor in manufacturing.

In order to achieve the above object, a first invention includes an airbag that restrains an occupant's body, and an airbag that is accommodated in the airbag and injects gas to inflate the airbag. The apparatus is provided with two supporting bolts in the gas generator, and the airbag is a single base cloth that is developed and cut into a predetermined shape so as to have a plurality of wrapped pieces . , said each of the plurality of wrapping piece has an insertion hole of the round hole shape for inserting the two bolts, the base fabric is accommodated in a folded state in the retainer, the gas generator housing space Nde write packet to be located at an end portion bent into a substantially rectangular parallelepiped shape, and inserting the plurality of packet pieces each insertion hole by overlapping the ends of said plurality of wrapped pieces on the two bolts of Do not sew at all by binding And forming a space for crucible enclosed within an end portion of one of the envelope piece of the plurality of wrapping piece portion, and wherein a folding providing a further insertion hole and the insertion hole To do.

  When an automobile or the like causes a collision or the like, the gas generator is activated to eject gas, and the ejected gas is supplied to the folded airbag, so that the airbag is inflated. Then, the lid is opened by this expansion, and the airbag inflated from the lid restrains a required part of the occupant's body.

  At this time, in the first invention of the present application, the base fabric cut into a predetermined shape is folded to wrap the gas generator, and the overlapping position of the end portion is set, for example, in the insertion hole provided at the overlapping position. By binding by inserting the supporting member to be supported, it is possible to configure an airbag that can maintain the housing space of the gas generator in a substantially sealed state. Thereby, the joint part by stitching can be greatly reduced, and the stitching process at the time of manufacture can be greatly reduced. Therefore, labor during manufacturing can be greatly reduced. As a result, the manufacturing cost can be reduced.

At this time, since the base fabric is a single sheet, a joint portion by stitching can be minimized, so that labor during manufacturing can be further reduced.

In addition, the gas generator is provided with two supporting bolts, and is a single base cloth that is expanded and cut into a predetermined shape so as to have a plurality of wrapping pieces, and each of the plurality of wrapping pieces. A round hole-shaped insertion hole for inserting two bolts is provided, and two bolts are inserted into the insertion hole and bound to form an airbag that can maintain the gas generator housing space in a substantially sealed state. be able to. Thereby, since the joint part by stitching can be greatly reduced, the labor at the time of manufacture can be greatly reduced.

  In the third invention of this application, the base fabric cut into a predetermined shape is folded to enclose the gas generator, and the overlapping position of its end is supported by the insertion hole provided at the overlapping position to support the gas generator By binding the air bag, it is possible to configure an airbag that can maintain the housing space of the gas generator in a substantially sealed state. Thereby, since the joint part by stitching can be greatly reduced, the labor at the time of manufacture can be greatly reduced.

Further, the insertion hole is processed into a round hole shape, and the inner periphery of the round hole can be strengthened by providing a circular sewing portion around the insertion hole having the round hole shape.

In addition, the end of the plurality of wrapping pieces are overlapped and bound, and partial sewing is performed to minimize the joint portion by stitching, and a substantially hermetically sealed space is formed inside, thereby accommodating the gas generator. It is possible to configure an airbag capable of maintaining the space in a substantially sealed state. Thereby, the joint part by stitching can be greatly reduced, and the stitching process at the time of manufacture can be greatly reduced. Therefore, labor during manufacturing can be greatly reduced. As a result, the manufacturing cost can be reduced.

  According to the present invention, labor during manufacturing can be greatly reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, a first embodiment in which the present invention is applied to a side airbag device will be described.

  FIG. 1A is a side view of the vicinity of a driver's seat of a vehicle showing a mounting position of a side collision airbag device SAB according to the first embodiment, and FIG. 1B is a side collision airbag. It is a side view which shows the time of the airbag expansion of apparatus SAB. 2A is a perspective view of the airbag when inflated as viewed from the fixed side, FIG. 2B is a sectional view taken along line IIb-IIb in FIG. 2A, and FIG. 3A is an inner surface of the airbag. FIG. 3B is a perspective view in the middle of assembling the airbag showing a state in which two wrapping pieces to be bent first are folded.

  The side-impact airbag device SAB shown in FIG. 1 is housed and installed in the backrest 12 of the seat 11 in the vehicle compartment shown in FIG. 1A, and an impact of a predetermined value or more is applied to the body side part of an automobile or the like. As shown in FIG. 1B, gas is generated by the gas generator 15 between the occupant M sitting on the seat 11 and the body side portion, and the airbag 14 is placed on the side of the occupant M. This is an airbag device that inflates and restrains the upper body of the occupant M.

  As shown in FIG. 1A, the airbag 14 is housed in the backrest 12 of the seat 11 in a state of being folded into the retainer 13 in a normal state. On the other hand, for example, when an automobile has a side collision, an initiator (not shown) of the gas generator 15 of the side airbag device SAB is activated by an inflator control circuit (not shown) and ignited gas generator. The gas from 15 is supplied into the airbag 14. Thereby, as shown in FIG. 1 (b), the air bag 14 supplied with the gas, for example, tears a sewing line (not shown) provided on the fabric on the lateral surface of the backrest 12 and jumps out of the seat 11, It expands along the body side part such as the passenger M seated on the seat 11.

  The airbag 14 of the side-impact airbag device SAB includes a single web (base fabric) 14A obtained by cutting the base fabric into a planar shape shown in FIG. Alternatively, the web 14A may be cut into a plurality of sheets and welded so as to have the planar shape shown in FIG. The web 14A extends vertically from the front part 141 that faces the occupant's body (in this case, the upper body) and two opposite sides of the front part 141, in this case, the upper and lower sides of the front part 141 when deployed. A first wrapping piece 142 and a second wrapping piece 143 which are folded so as to wrap the gas generator 15 inside and overlap and bind the end edges, and the remaining two sides of the front portion 141, here Then, both side openings that extend from the right side and the left side of the front portion 141 and are not closed by the first wrapping piece 142 and the second wrapping piece 143 are closed, and the first wrapping piece 142 and the second wrapping piece 142 It is the shape provided with the 3rd wrapping piece part 144 and the 4th wrapping piece part 145 which overlap and bind on the overlapping part of the wrapping piece part 143. In FIGS. 3A and 3B, reference numeral 147 indicated by a broken line indicates a folding line.

  And the 1st thru | or 4th wrapping piece parts 142-145 bend | fold the bending space 147 so that the space which accommodates the gas generator 15 may become a rectangular parallelepiped. When the third wrapping piece portion 144 is first bent and then the fourth wrapping piece portion 145 is bent, the configuration shown in FIG. 3B is obtained, and then the first wrapping piece portion 142 is bent to end the edge. Is joined to the edge of the second wrapping piece part 143 to be folded at the end, and then the folded edge is folded back to the first wrapping piece part 142 side so as to coincide with the joined edge. The insertion hole (circular hole) 146 that coincides with the insertion hole (circular hole) 146 provided in each of the third wrapping piece portion 144, the fourth wrapping piece portion 145, and the first wrapping piece portion 142 that overlaps the inside thereof. To do. That is, the insertion hole 146 has the first to fourth wrapping pieces 142 facing the front surface 141 when the first to fourth wrapping pieces 142 to 145 are bent so as to form a gas expanding space. The back surface position on the overlapping side of ˜145, provided in a state where the web 14A is opened so as to be present at a position corresponding to the two stud bolts 15a for supporting the gas generator 15 accommodated therein. It is done.

  The insertion hole 146 is processed into a round hole shape, and the opening area is set smaller than the cross-sectional area of the stud bolt 15a of the gas generator 15, and the stud bolt 15a is inserted into the insertion hole 146. At this time, it is preferable that the stud bolt 15 a is in an interference fit state with respect to the insertion hole 146. Furthermore, in order to strengthen the circumference (inner peripheral edge) of the round hole of the insertion hole 146, circular sewing may be performed.

  The gas generator 15 ignites gunpowder and causes the gas generator to react by using heat to react with the gas generating agent. The ignition control is performed by a connector (not shown) and a cable ( This is performed by a control unit (not shown) connected via a not-shown). As shown in FIG. 2B, the gas generator 15 is held by a gas generator holding member 151, and a stud bolt (support member) 15 a is projected from a side surface of the gas generator holding member 151. Yes. The stud bolt 15a is inserted into an insertion hole (circular hole) 146, and a nut 15b is tightened into the stud bolt 15a, whereby the gas generator holding member 151 is fixed to the retainer 13 (FIG. 2B). )reference).

  Accordingly, the single web 14A constituting the airbag 14 has the gas generator 15 placed horizontally on the front portion 141 (inner surface), and then the upper third wrapping piece portion 144 and the lower fourth portion. Insertion holes 146 provided in the order of the wrapping piece portion 145 and the first wrapping piece portion 142 on the right side are respectively fitted into the stud bolts 15a of the gas generator 15 (see FIG. 3 (b)). The second wrapping piece 143 is raised to the edge of the first wrapping piece 142 and the insertion hole 146 provided in the end lip is joined to align the stud bolt 15a of the gas generator 15. The first to fourth wrapping pieces 142 to 145 are bent so that the space for accommodating the gas generator 15 is a substantially rectangular parallelepiped. The first wrapping piece 142 has two pairs of two insertion holes 146 and is folded back and fitted onto the stud bolt 15a of the gas generator 15 (see FIGS. 2A and 3). Since it is not necessary to form a hem (folding line) in the web 14A, the space (gas expansion space) for accommodating the gas generator 15 is not a tight ridgeline as shown in the figure but has a roundness. It will be. By simply assembling in this way, the air bag 14 has been assembled in a state where the gas generator 15 is accommodated, and is folded in an appropriate folding manner so that it can be easily inflated by the gas rapidly ejected from the gas generator 15. (Not shown) is housed and fixed in the retainer 13 shown in FIG. 1 and is placed inside the retainer 13.

  According to the side-impact airbag device SAB having the above-described configuration, when the automobile 14 or the like collides head-on in a state where the airbag 14 is folded inside the lid, the gas generator 15 is activated. Gas is ejected, and the ejected gas vigorously flows into the space folded by the front portion and the first to fourth wrapping pieces 142 to 145.

  At this time, in the present embodiment, the gas generator 15 is folded by wrapping the web 14A cut into a predetermined shape, and the gas generator 15 is wrapped in the insertion hole 146 provided at the end position. By binding by inserting the stud bolt 15a that supports 15, it is possible to configure the airbag 14 that can maintain the accommodating space of the gas generator 15 in a substantially sealed state. Thereby, the joint part by stitching can be greatly reduced, and the stitching process at the time of manufacture can be greatly reduced. Therefore, labor during manufacturing can be greatly reduced. As a result, the manufacturing cost can be reduced.

  In the present embodiment, in particular, the airbag 14 is constituted by a single web 14A. Thereby, since the joint part by stitching can be minimized, labor at the time of manufacturing can be further reduced.

  Furthermore, according to the airbag apparatus for a side collision of this embodiment, since the airbag is formed by folding and binding flat webs, the web can be formed simply by cutting the base cloth with a press, and the configuration is simplified. it can. Even when a plurality of webs are used, stitching or welding is easy because they can be joined together in a plane rather than three-dimensionally. Furthermore, as will be described later, various variations can be adopted as the shape of the base fabric constituting the airbag, and as a result, the amount of waste that can be effectively used at the time of cutting the base fabric is reduced, and the production cost is reduced. It can be kept cheaper.

  Further, according to the airbag device for a side collision, since the airbag is formed by bending a flat web and binding it, a gap through which the gas inside the airbag appropriately flows out to the outside is formed. When the occupant is received by the air bag, it is possible to secure an internal pressure at the initial stage of deployment of the airbag and to function as a pressure adjusting means for reducing the internal pressure of a predetermined inflation space in the airbag so as to reduce a reaction force acting on the occupant. it can. As a result, the airbag does not have a cushioning property due to high pressure and bulges into a pan, and it is possible to retain a moderate cushioning property as a side impact airbag.

  The present invention is not limited to the first embodiment, and various modifications as described below are possible without departing from the spirit and scope of the technical idea.

  FIG. 4 (a) is a plan development view seen from the inner surface side of the airbag according to the airbag apparatus for side collision which is a first modified example of the airbag apparatus of the present invention, and FIG. It is a perspective view in the middle of the assembly of the airbag which shows the state which folded the one wrapping piece part folded in half.

  Although not shown, the side-impact airbag device includes a container-like retainer, an airbag, and a gas generator, as in FIG. The airbag is composed of a single web 14B obtained by cutting a base fabric into a planar shape shown in FIG.

  The web 14B mainly extends at the front side 141 'facing the occupant's body (in this case, the upper body) at the time of deployment, and extends upward and downward from the upper and lower sides of the front part 141' so that the gas generator is placed inside. A first wrapping piece portion 142 ′ and a second wrapping piece portion 143 ′ that are folded so as to be wrapped and bound by overlapping edges, and the first wrapping piece portion is extended to the right side of the front face portion 141 ′. 142 'and the second wrapping piece 143' are closed on both side openings that are not closed, and the first wrapping piece 142 'and the second wrapping piece 143' are overlapped and bound together with the binding pieces. 3 wrapping piece portions 144 '.

  In addition, the code | symbol 147 shown with a broken line in Fig.4 (a), (b) shows a bending line. Further, the web 14B may be formed by cutting into a plurality of sheets so that a half end (discarded portion) does not appear at the time of cutting, and adding them to form a planar shape shown in FIG. 4A by welding.

  When the third wrapping piece portion 144 ′ is bent by one or more turns at first, the two pairs of insertion holes 146 provided in the third wrapping piece portion 144 ′ are coincident and shown in FIG. 4B. Then, the first wrapping piece 142 ′ is folded and the end edge is joined with the end edge of the second wrapping piece 143 ′ that is folded last, and then the joined edge is connected to the first wrapping piece 142 ′. The insertion holes 146 provided at the edges of the wrapping pieces 142 'overlapped and folded together coincide with each other.

  Accordingly, the web 14B is bent by placing the gas generator on the front surface 141 ′ (inner surface) and then turning the upper third wrapping piece 144 ′ one or more turns as shown in FIG. 4B. At this time, the insertion holes 146 having two pairs in the third wrapping piece portion 144 ′ are fitted into the stud bolt 15a of the gas generator, and then the first wrapping piece portion 142 ′ on the upper side is folded and the first wrapping piece portion 142 ′ is bent. The insertion hole 146 provided in the first wrapping piece 142 ′ is fitted into the stud bolt 15a of the gas generator. Finally, the second wrapping piece 143 ′ is raised and this end edge and the right first When the edge of the wrapping piece 142 ′ is put together and the insertion hole 146 provided in the edge is aligned and fitted into the stud bolt 15a of the gas generator, the first to third wrapping pieces 142 ′, 143 ′, 144 'accommodates the gas generator 15 and becomes a substantially rectangular parallelepiped. It will form between.

  Also in the first modified example having the above-described configuration, it is possible to significantly reduce labor during manufacturing as in the first embodiment.

  FIG. 5A is a developed plan view seen from the inner surface side of an airbag according to a side-impact airbag device which is a second modification of the airbag device of the present invention, and FIG. 5B is bent first. It is a perspective view in the middle of the assembly of the airbag which shows the state which bent the two wrapped piece parts.

  Although not shown, the airbag device includes a container-like retainer, an airbag, and a gas generator, as in FIG. The airbag is composed of a single web 14C obtained by cutting the base fabric into a planar shape shown in FIG.

  The web 14C is deployed in a direction perpendicular to the longitudinal direction of the vehicle, and a front portion 141 ″ that mainly faces the occupant's body (in this case, the knee) during deployment, and the upper and lower sides of the front portion 141 ″. A first wrapping piece portion 142 ″ and a second wrapping piece portion 143 ″ that are further extended vertically and folded so as to wrap the gas generator 15 inside and overlap the edges, and the front portion 141. The first wrapping piece 142 "and the first wrapping piece 142" and the second wrapping piece 143 "are extended from the right and left sides of the right side and are not closed by the second wrapping piece 143". The shape is provided with a third wrapping piece portion 144 ″ and a fourth wrapping piece portion 145 ″ that overlap and bind with the binding piece portion of the second wrapping piece portion 143 ″. The first wrapping piece. The portion 142 "has inner winding portions 142a and 142a. But, different from the web 14A of FIG.

  In addition, the code | symbol 147 shown with a broken line in Fig.5 (a), (b) shows a fold line. Further, the web 14C may be formed by cutting into a plurality of sheets so that a half end (discarded portion) does not appear at the time of cutting, and adding them to form a planar shape shown in FIG. 5A by welding.

  First, the first wrapping piece 142 ″ is bent at a right angle, and in this state, the inner winding portions 142a and 142a are bent to surround the front portion 141 ″, and then the second wrapping piece 143 ″ is bent at a right angle. 5 (b). Subsequently, the third wrapping piece portion 144 ″ and the fourth wrapping piece portion 145 ″ are bent, and the insertion holes provided in the third and fourth wrapping piece portions are gas-filled. After fitting on the stud bolt 15a of the generator 15, the first wrapping piece 142 "is bent, and its edge is joined with the edge of the second wrapping piece 143" to be folded last, The joined edges are overlapped and folded over the first wrapping piece 142 ", and the corresponding insertion holes 146 provided in the joined edges are fitted into the stud bolts 15a of the gas generator 15 (illustrated). do not do).

  As a result, the first to fourth wrapping pieces 142 ″, 143 ″, 144 ″, 145 ″ accommodate the gas generator 15 and form a substantially rectangular parallelepiped space.

  Also in the second modified example having the above-described configuration, it is possible to significantly reduce labor during manufacturing as in the first embodiment.

  FIG. 6A is a developed plan view seen from the inner surface side of the airbag according to the airbag apparatus for side collision which is a third modification of the airbag apparatus of the present invention, and FIG. 6B is bent first. It is a perspective view in the middle of the assembly of the airbag which shows the state which bent the two wrapped piece parts.

  Although not shown, the side-impact airbag device includes a container-like retainer, an airbag, and a gas generator, as in FIG. The airbag is composed of a single web 14D obtained by cutting a base fabric into a planar shape shown in FIG.

  The web 14D mainly extends at the front side 141 "'opposed to the occupant's body (in this case, the upper body) at the time of deployment, and extends upward and downward from the upper and lower sides of the front part 141"'. First wrapping piece portion 142 "'and second wrapping piece portion 143"' which are folded so as to be wrapped inward and bound by overlapping edges, and extend from the right and left sides of the front portion 141 "'to the left and right. The first wrapping piece 142 "'and the second wrapping piece are closed by closing both side openings that are present and are not closed by the first wrapping piece 142"' and the second wrapping piece 143 "'. The third wrapping piece portion 144 "'and the fourth wrapping piece portion 145"' are overlapped with the binding piece portion of 143 "'. The third wrapping piece portion 144"' And the fourth wrapping piece portion 145 ″ ′ includes the inner winding portions 144d and 145d. The point that you are is different from the web 14A of FIG.

  In addition, the code | symbol 147 shown with a broken line in Fig.6 (a), (b) shows a fold line. Further, the web 14D may be formed by cutting into a plurality of sheets so that a half end (discarded portion) does not appear at the time of cutting, and adding them to form a planar shape shown in FIG. 6A by welding.

  First, the third wrapping piece portion 144 ″ ′ and the fourth wrapping piece portion 145 ″ ′ are bent, and the insertion hole 146 provided in the third and fourth wrapping piece portions is covered with the stud bolt 15a of the gas generator 15. When the inner winding portions 144d and 145d are bent at right angles to surround the front portion 141 "', the configuration shown in FIG. 6 (b) is obtained, and then the first wrapping piece portion 142"' is bent. The end of the second wrapping piece 143 ″ that is bent lastly with the end edge of the insertion hole 146 provided in the first wrapping piece 142 ″ ′ that has been overfitted with the stud bolt 15 a of the gas generator 15. After joining with the edge, the joined edge is overlapped with the first wrapping piece 142 ′ ′ and folded, and the insertion holes 146 provided in the joined edges are respectively connected to the gas generator 15. Fits on stud bolt 15a (not shown)

  Also in the third modified example having the above-described configuration, an effect is obtained that the labor at the time of manufacture can be greatly reduced as in the first embodiment.

  Next, a second embodiment in which the present invention is applied to a leg airbag device having an airbag that inflates in front of an occupant's leg at the time of a collision will be described with reference to the drawings.

  FIG. 7 is a cross-sectional view of the vicinity of the front portion of the vehicle seat showing the airbag of the leg airbag device when the airbag is inflated. FIG. 8A is a perspective view (plan view) from the interior panel side of the airbag. FIG. 8B is a sectional view taken along line VIIIb-VIIIb in FIG. Since the airbag of the leg airbag device is deployed, since the configuration is the same as that of the airbag of the side airbag device shown in FIGS.

  The leg airbag device NAB shown in FIG. 8 is normally folded and accommodated in the retainer 13 "", and when an impact of a predetermined value or more is applied to the body of an automobile or the like due to a collision or the like, the gas generator The airbag device restrains the occupant's body by generating gas by 15 "" and inflating the airbag 14 "" in front of the occupant's legs.

  As shown in FIG. 7, the leg airbag device NAB shown in FIG. 8 is installed on the interior panel 16 as a compartment member in front of the seat seat 11 with the longitudinal direction of the gas generator substantially horizontal.

  This leg airbag device NAB includes a container-like retainer 13 "", an airbag 14 "" that is housed in the retainer 13 "" and that inflates and restrains an occupant upon collision, and the airbag 14 "" A gas generator 15 "" for inflating the airbag 14 "" by injecting gas at the time of collision is provided. The retainer 13 ″ ″ is disposed in the opening 16 a provided in the interior panel 16. In this embodiment, the opening 16a is provided at a height equal to or lower than the height near the seat surface of the seat 11 "". In normal times, the airbag 14 "" is folded and housed in the retainer 13 "" and is mounted on the interior panel 16 with stud bolts (support members) 15a "" and nuts 15b "" that support the gas generator 15 "". A lid (not shown) is mounted on the front surface of the retainer 13 "" so as to cover the airbag 14 "". The lid is arranged so as to be substantially inside the interior panel 16 in a normal state. When the airbag 14 ″ ″ is inflated, the lid opens to the front side of the interior panel 16 with the lower end side as a supporting end. The airbag 14 "" is inflated from the opening along the front surface (occupant side surface) of the interior panel 16 from the bottom to the top when deployed.

  The leg airbag device NAB having such a configuration is arranged inside the panel with the airbag 14 "" folded in a normal state, and a lid is attached so as to cover the folded body of the airbag. It has been. When an impact of a predetermined value or more is applied to the body of an automobile or the like at the time of a collision of an automobile or the like, a gas is generated by the gas generator 15 "" and this jet gas is supplied to the airbag 14 "" As the airbag 14 "" is inflated, the lid is opened. As a result, the airbag 14 "" is allowed to inflate outside the panel and is inflated and deployed between the interior panel and the lower leg of the occupant. The lower leg of the occupant is prevented from colliding with the interior panel.

  Also in the leg airbag device according to the second embodiment of the present invention, the web 14 "" cut into a predetermined shape is folded to wrap the gas generator 15 "", and the end thereof Of the gas generator 15 "" by binding the stud bolt 15a "" supporting the gas generator 15 "" into the insertion hole 146 "" provided at the overlap position. An airbag 14 ″ ″ that can maintain the space in a substantially sealed state can be configured. Thereby, the joint part by stitching can be greatly reduced, and the stitching process at the time of manufacture can be greatly reduced. Therefore, labor during manufacturing can be greatly reduced. As a result, the manufacturing cost can be reduced.

  In the above embodiment, the case where the present invention is applied to the side airbag device and the leg airbag device has been described. However, the present invention is not limited to this. Driver airbag system that inflates and deploys to the passenger side, passenger airbag that inflates and deploys from the instrument panel to the passenger seat, and curtain air that inflates and deploys between the body side of the vehicle and the occupant during a side impact The present invention can be applied to various airbag devices for restraining the occupant's body at the time of a vehicle collision, such as a bag, a roof airbag that inflates and deploys on the occupant's head, or a rear seat airbag. Further, the airbag of the side airbag device according to the modification shown in FIGS. 4 to 6 of the first embodiment is applicable to the airbag of the leg airbag device of the second embodiment, In each of the embodiments, as in the first embodiment, it is possible to significantly reduce labor during manufacturing.

  In the above description, the airbag has been described as an example in which the sewing is not performed at all by folding the base fabric and binding the end portions. However, the airbag is not limited thereto, and the end portions are folded and partially bound. An airbag formed by sewing may be used. In this case as well, the same effect that the labor during manufacturing can be reduced is obtained.

  Furthermore, in the above, the case where the present invention is applied to an airbag apparatus using a gas generator that ejects a high-temperature gas using explosives has been described as an example. You may apply this invention with respect to the airbag apparatus using the gas generator which ejects. In this case, the same effect can be obtained.

FIG. 3 is a cross-sectional view of the vicinity of the front of the seat of the vehicle, showing the airbag of the side collision airbag device according to the first embodiment of the present invention when the airbag is inflated. It is the perspective view which looked at the airbag from the interior panel side in connection with the airbag of the airbag apparatus for side collision which concerns on the 1st Embodiment of this invention, and IIb-IIb sectional drawing in Fig.2 (a). It is the plane development view seen from the inner surface side of the airbag of the airbag apparatus for side collision, and the perspective view in the middle of the assembly of the airbag which shows the state where the two wrapping piece parts bent ahead are folded. The plane development view seen from the inner surface side of the air bag of the air bag device for side impact concerning the 1st modification of a 1st embodiment of the present invention, and the air which shows the state where one enveloping piece part bent first is bent It is a perspective view in the middle of the assembly of a bag. The plane development view seen from the inner surface side of the airbag of the side airbag device according to the second modification of the first embodiment of the present invention, and the air showing the state where the two wrapping pieces that are bent first are folded. It is a perspective view in the middle of the assembly of a bag. The plane development view seen from the inner surface side of the airbag of the side impact airbag device according to the third modification of the first embodiment of the present invention, and the air showing the folded state of the two wrapping pieces to be folded first It is a perspective view in the middle of the assembly of a bag. FIG. 6 is a cross-sectional view of the vicinity of a front portion of a vehicle seat that shows the airbag device for a leg portion according to the second embodiment of the present invention when the airbag is inflated. It is related with the airbag of the airbag apparatus for legs which concerns on the 2nd Embodiment of this invention, The perspective view which looked at the airbag from the interior panel side, and VIIIb-VIIIb sectional drawing in Fig.8 (a).

Explanation of symbols

SAB side airbag device (airbag device)
11 Seat Seat 12 Backrest 13, 13 "" Retainer 14 Airbag (Airbag)
14A-14D web (base fabric)
141, 141 "" Front part 142, 142 ', 142 ", 142"', 142 "" First wrapped piece 143, 143 ', 143 ", 143"', 143 "" Second wrapped piece 144 , 144 ′, 144 ″, 144 ″ ′, 144 ″ ″ Third wrap piece 145, 145 ″, 145 ″ ′, 145 ″ ″ Fourth wrap piece 146, 146 ″ ″ Insertion hole 15 Gas generator 15 a Stud bolt (support member)
NAB Leg Airbag Device (Airbag Device)
16 Interior panel

Claims (3)

An airbag that restrains the occupant's body;
An airbag device having a gas generator housed in the airbag and inflating the airbag by ejecting gas;
The gas generator is provided with two supporting bolts,
The airbag is
It is a single base cloth that is expanded and cut into a predetermined shape so as to have a plurality of wrapping pieces, and each of the plurality of wrapping pieces has a round hole shape through which the two bolts are inserted . has an insertion hole, said base fabric is accommodated in a folded state in the retainer, the bent into a substantially rectangular parallelepiped Nde write packet as the gas generator is located at the end of the accommodation space, the plurality of wrapping pieces By overlapping each end and inserting the respective insertion holes of the plurality of wrapping pieces into the two bolts and binding them, a space that is almost sealed without sewing is formed inside, and
The airbag apparatus according to claim 1, wherein an end portion of one of the plurality of wrapping piece portions has a folded portion in which an insertion hole different from the insertion hole is formed . The airbag apparatus according to claim 1, wherein
The airbag is
An airbag device comprising a circular sewing portion around the insertion hole having the round hole shape. In the airbag apparatus of Claim 1 or Claim 2,
An airbag device characterized in that a plurality of wrapping piece portions are overlapped and bound, and partial sewing is performed to minimize a joint portion by stitching, thereby forming a substantially sealed space inside.

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