JP4380313B2 - Airbag device - Google Patents

Description

E The present invention relates to airbags apparatus for protecting an occupant in a vehicle collision or the like, in particular, having a left airbag section and the right airbag inflated, respectively, in the passenger of the front left and right The present invention relates to an airbag device.

  As airbags for protecting the occupant in the event of a vehicle collision, etc., there are a left half airbag and a right half airbag that are inflated on the left and right sides in front of the occupant, respectively, and these are inflated by a common inflator A configured airbag is described in Japanese Patent Laid-Open No. 4-292239. In the airbag of the same publication, the front end portions of the left half airbag and the right half airbag are connected by a tie panel.

  The airbag is folded and accommodated in a case, and is covered with a cover. When the inflator (gas generator) performs a gas ejection operation at the time of a vehicle collision, the airbag expands forward of the occupant while pushing the cover open.

  The inflator is disposed inside or outside the base end side of the airbag. In an airbag device having a structure in which the inflator is arranged outside the base end side of the airbag, the gas blown out of the inflator passes through the gas inlet port provided on the base end side of the airbag. To be supplied.

When the inflator is disposed inside the base end side of the airbag, the entire inflator may be disposed in the airbag, or a part of the inflator may be disposed in the airbag. An example of the latter is a configuration in which a pair of slit-like openings are provided in the airbag, rod-like inflators are passed through these slit-like openings, and both end sides of the inflator are projected outside the airbag.
Japanese Patent Laid-Open No. 4-292239

  I. In the airbag disclosed in the above Japanese Patent Laid-Open No. 4-292239, since the tip portions of the left half airbag and the right half airbag are connected by a tie panel, the tie panel is used when the airbag is inflated. Will receive the center of the occupant's body in the left-right direction.

  In the present invention, the inflated left half airbag receives the left chest of the occupant, the right half airbag receives the right chest, and the space portion of the inflated airbag is opposed to the center of the occupant's chest in the left-right direction. An object of the present invention is to provide an airbag apparatus configured to do so.

  II. In the airbag disclosed in Japanese Patent Laid-Open No. 4-292239, when the left half airbag and the right half airbag are inflated, a large amount of gas from the inflator flows into one of these airbags. As a result, the inflation of the other airbag may be delayed from that of the one airbag.

  In the airbag of the same publication, since the left half airbag and the right half airbag are connected by a tie panel, even if the inflation of one of these airbags is delayed, the airbag is preceded. It can be expected that the inflated airbag pulls the inflated airbag through the tie panel in the inflating direction and promotes the inflation. However, since the tie panel connects the front end portions of the left half airbag and the right half airbag, the inflation of the airbag that has started inflating in advance is inflated until the leading end is inflated. The airbag cannot be pulled sufficiently through the tie panel.

  In one aspect of the present invention, an object of the present invention is to provide an airbag apparatus in which both the left half airbag and the right half airbag are inflated smoothly and substantially uniformly from the initial stage of inflation.

III. In an airbag having a left half airbag and a right half airbag as in the above Japanese Patent Application Laid-Open No. 4-292239, when the volume of the left half airbag and the right half airbag during expansion is large, the airbag It is necessary to employ a large inflator as an inflator in order to inflate the air at an early stage. The invention, in yet another aspect, an object of the left airbag section and the right airbag even when the capacity of the inflator is relatively small to provide an expansion to Rue airbag device sufficiently early .

An airbag device of the present invention (Claim 1) includes a folded airbag and an inflator that inflates the airbag, and the airbag is ejected from the inflator disposed on the base end side of the airbag. An airbag device in which the distal end side is inflated away from the base end side, and as the airbag, a left half airbag that is inflated on the left side in front of the occupant and a right half side airbag that is inflated on the right side in front of the occupant In the airbag device having a bag, the left half airbag and the right half airbag have their distal end portions disconnected from each other, and thereby the left half airbag in an inflated state. And a space that opens toward the occupant is formed between the front end portions of the right-half airbag and the right-half airbag. Bags are respectively elongated primary folded bodies in the vertical direction by being primary folded, then, are the final folded body by being secondary folded so as to reduce the vertical width, the primary At least a part of the fold is a roll fold, the roll fold of the left half airbag is clockwise when viewed from above, and the roll fold of the right half airbag is counterclockwise when viewed from above Yes, the middle part in the inflating direction and the middle part in the vertical direction among the facing parts of the left half airbag and the right half airbag are connected by a tongue-like, panel-like, string-like or net-like connecting part. When the primary fold is performed, the leading end side of the left half airbag and the right half airbag is separated from each other along a folding line A in the vertical direction along the connecting portion. The fold line A of the left half airbag and the right half airbag is more proximal than the fold line A, and the fold line C in the vertical direction in the middle between the connecting portion and the base end side, The folding line C is folded along the folding line B in the vertical direction between the folding line C and the base end side so that the folding lines C are separated from each other, whereby the left half airbag and the right half side The base end side of the fold line A of the airbag is folded along the fold line C in a direction in which the portions between the fold lines C and A approach each other, and the fold line A portion between the fold lines B and C is folded along the line B in a direction away from each other, whereby the fold lines A and B of the left half airbag are overlapped with each other, and the left half A portion of the side airbag from the fold line A to the tip side, the fold A portion between the fold lines B and C and a portion between the fold lines C and A are overlapped to form a front end side overlapped body, and the fold lines A and B of the right half airbag are overlapped. And the portion of the right half side airbag from the fold line A to the tip side, the portion between the fold lines B and C, and the portion between the fold lines C and A are overlapped to form a tip side overlapped body, The overlapped body on the front end side of the half airbag is roll-folded from the fold line C toward the fold lines A and B, and the overlapped body on the front end side of the right half airbag is the fold line. The roll-folding is performed from the C side toward the folding lines A and B, and the base end side of the folding line B is bellows-folded .

An airbag device of the present invention ( Claim 2) includes a folded airbag and an inflator that inflates the airbag, and the airbag is ejected from the inflator disposed on the base end side of the airbag. An airbag device in which the distal end side is inflated away from the base end side, and as the airbag, a left half airbag that is inflated on the left side in front of the occupant and a right half side airbag that is inflated on the right side in front of the occupant In the airbag device having a bag, the left half airbag and the right half airbag have their distal end portions disconnected from each other, and thereby the left half airbag in an inflated state. And a space that opens toward the occupant is formed between the front end portions of the right-half airbag and the right-half airbag. Bags are respectively elongated primary folded bodies in the vertical direction by being primary folded, then, are the final folded body by being secondary folded so as to reduce the vertical width, the primary folding bellows-like folded der is, and when folding bellows the left airbag section and the right airbag, primary folded body and are left airbag and the most advanced right airbag when the The airbag device is folded so as to be directed in directions away from each other .
According to a third aspect of the present invention, the airbag device according to the second aspect is characterized in that the middle part in the inflating direction and the middle part in the vertical direction are in the form of tongues in the facing part of the left half airbag and the right half airbag. They are connected by a panel-like, string-like or net-like connecting part.

  The airbag device according to claim 4 is the airbag device according to any one of claims 1 to 3, wherein the secondary folding is performed by separately folding the upper half side and the lower half side of the primary folded body. It is what.

  The airbag device according to claim 5 is characterized in that, in claim 4, the amount on the upper half side is larger than the amount on the lower half side.

The airbag device according to claim 6 is the airbag device according to any one of claims 1 to 5, wherein the left-side airbag and the left-side airbag are connected to each other at the base end sides thereof. And the right-half airbag is inflated by a common inflator .

Airbag apparatus 請 Motomeko 7, in any one of claims 1 to 6, wherein in order to regulate the respective lateral widths during inflation of the left airbag section and the right airbag A hanging strap is constructed between the panels of the left half airbag and the right half airbag themselves.

Airbag apparatus according to claim 8, in claim 7, connecting member and facing portion between a middle portion of the expansion direction of the left airbag section and the right airbag section extends to the connecting direction of the two The hanging strap and the connecting body are arranged in a straight line in a state where the airbag is inflated.

The airbag device according to claim 9 is the airbag device according to claim 8 , wherein the connection body is in a panel shape, the suspension strap is in a belt shape, and the panel surface of the connection body and the belt of the suspension strap in a state where the airbag is inflated. The surface is provided so as to be flush with the vertical direction .

In the airbag apparatus according to the present invention, when the inflator is activated and the airbag is inflated, the left half airbag receives the occupant's left chest and the right half airbag receives the occupant's right chest. There are hard and strong ribs on the left and right chests. The airbag receives and absorbs the impact of the occupant through the ribs. In the inflated state, this airbag has a space portion between the tip portions of the left half airbag and the right half airbag, and the vicinity of the sternum at the center of the chest of the occupant faces the space portion. Accordingly, when the occupant's body rushes into the airbag, the area around the sternum of the chest is not subjected to such a large reaction force from the airbag, and the burden around the sternum is reduced.

  In the present invention, in the state where the airbag is inflated, if the distance between the leading edges of the left half airbag and the right half airbag is 150 to 450 mm, the inflated left half airbag is centered on the left chest. The right airbag on the right side faces the vicinity of the center of the right breast, and the vicinity of the ribs on the upper body of the occupant is received by the airbag very firmly.

  In the airbag device according to the present invention, the airbag is formed into a vertically folded primary folded body, and then the secondary folded body is used as a final folded body. When the inflator is actuated, the left half airbag and the right half airbag are inflated relatively quickly, and then inflated toward the occupant. For this reason, the size (first contact area) of the first contact surface with the occupant is wide.

An airbag apparatus 請 Motomeko 1, at least a portion of the primary folded is a folding roll, is folded the roll of the left half airbag is clockwise when viewed from above, the right airbag The roll fold is counterclockwise as viewed from above. When this airbag is inflated, the left half airbag approaches the left chest so as to wrap the left chest from the left front of the occupant's left chest, and the right half airbag wraps the right chest from the right front of the occupant's right chest. Get closer. As a result, the occupant's head is also received by the airbag so as to be sandwiched from the left and right fronts.

In claim 2, the primary folding Ru der folding bellows. By it was according primary folded, so inflated Both the left half airbag and the right airbag to receive the left breast and the right breast of the passenger from the front direction.

  In the present invention, it is preferable to perform the secondary folding so that the upper half side and the lower half side of the primary folded body are separately folded. Thereby, it becomes possible to arbitrarily adjust the amount of the upper half of the airbag folded and the amount of the lower half. Then, for example, by performing secondary folding so that the amount on the upper half side is larger than the amount on the lower half side (Claim 5), the left half airbag and the right half airbag in the initial stage of airbag inflation. The upper half side of the bag expands more than the lower half side. As a result, the occupant-facing surfaces of the left half airbag and the right half airbag become relatively vertical and approach the occupant, so that the first contact area is increased.

  In the present invention, the left half airbag and the right half airbag may be inflated by gas from a common inflator (Claim 6), and in this way, the number of inflators is reduced. Manufacturing cost can be reduced.

請 In Motomeko 1,3, and has a connecting portion and the expansion direction of the midsections is coupled out of the facing portions of the left airbag and the right airbag section.

  In this way, when the intermediate portions are connected to each other, even if one of these is delayed in inflation when the airbag is inflated, the airbag that has been inflated in advance is delayed in inflation. The one airbag is pulled to promote its expansion. Moreover, since the middle portions of the left half airbag and the right half airbag in the inflating direction are connected to each other, the other bag that has started to inflate in advance is inflated to the middle portion. At this stage, the one airbag that is delayed in inflation is started to be pulled in the inflation direction. Thus, both the left half airbag and the right half airbag are inflated smoothly and substantially evenly from the initial stage of inflation.

In 請 Motomeko 1, when primary folded, the distal end side than the connecting portion of the left airbag section and the right airbag along fold lines A along the connecting portion, in a direction away from each other Folded, the base end side of the fold line A is along the fold line C between the connecting portion and the base end side of the left half airbag and the right half airbag, and the left half air bag The fold line C of the bag and the right half side airbag is folded away from each other, the fold line B on the base end side with respect to the fold line C is overlapped with the fold line A, and the front end side with respect to the fold line B is is folded the roll are overlapped with each other, the base end side than the folding line B that is bellows-folded.

  Since this primary folded body is accordion-folded on the base end side relative to the fold line C, when the airbag is inflated, the base-end side folded bellows is quickly inflated, and then the tip-end side that is roll-folded is the occupant. It expands so that it is sandwiched and wrapped from the left and right.

As the air bag equipment according to claim 7, by providing the belt strap, since the lateral widths during expansion is restricted, the left half be employed having a small capacity inflator airbag and the right half The side airbag is inflated sufficiently early. By adjusting the length of the hanging strap, the width of the inflated left and right airbags can be set to a desired value .

In the airbag equipment in 請 Motomeko 8, since facing portions between the left airbag section and the right airbag are connected by a connecting member extending in the connecting direction of the two, expanded The distance between the left half airbag and the right half airbag can be regulated by the length of the connecting body.

Furthermore, in the airbag equipment in this claim 8, since the hanging strap and the connecting member are arranged in a straight line, the expanded configuration of the left half airbag and the right airbag stability Will be.

As the air bag equipment of claim 9, the hanging strap is belt-shaped, and when the belt surface is the hanging strap are provided such that the vertical direction in the time of airbag inflation, the belt surface horizontal Compared to the case where the direction is set, the stress generated in the joint portion between the strap and each bag when the airbag is inflated is reduced.

As the air bag equipment of claim 9, the connecting body is panel-like, compared with the case that the panel surface when such a vertical direction in the time of airbag inflation, in which the panel surface and a horizontal direction And the stress which arises in the joint part of a connection body and each bag at the time of airbag expansion | swelling is reduced.

  Further, when the panel surface and the belt surface of the hanging strap are flush with each other, folding is facilitated by folding the airbag along these surfaces when the airbag is primarily folded.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 (a) is a perspective view of an airbag according to an embodiment of the present invention in an inflated state, FIG. 1 (b) is a sectional view taken along line BB in FIG. 1 (a), and FIG. Is a sectional view taken along the line II-II in FIG. 1 (b), FIG. 3 (a) is an exploded perspective view of the airbag, and FIG. 3 (b) is an enlarged view of portion B in FIG. is there. 4 to 11 are perspective views showing a procedure for folding the airbag. 12 to 14 are explanatory views of the inflation operation of the airbag. FIG. 14 (a) shows the case where the front end side of the left half airbag and the right half airbag hits an occupant, and FIG. 14 (b) shows that the left half airbag and the right half airbag are The time when the expansion is completed is shown.

  The airbag 10 includes a right half airbag 12 inflated on the right side in front of the occupant, a left half airbag 14 inflated on the left side in front of the occupant, the right half airbag 12 and the left half airbag 14. And a communication portion 16 that communicates one end side of each other. The communication part 16 is the base end side of the airbag 10. Therefore, the right half airbag 12 and the left half airbag 14 are inflated in a direction away from the communication portion 16.

  When the airbag 10 is inflated, there is no bridge member such as a tie panel between the front end portions of the right half airbag 12 and the left half airbag 14, and both the bags 12, 14 The space 13 formed between the front end portions of the two is open toward the occupant (that is, upward in FIG. 1B).

  In a state where the airbag 10 has been inflated, the distance W between the most distal end 12t of the right half airbag 12 and the most distal end 14t of the left half airbag 14 is 150 to 450 mm, particularly 170 to 430 mm. Is preferred.

  In the airbag 10, the middle portion in the inflating direction of the right half airbag 12 and the middle portion in the inflating direction of the left half airbag 14 are joined by a seam 52 to form a connecting portion 70.

  In this embodiment, the airbag 10 is formed by stitching the panels 18, 20, 22, 24, 26, and 28. Below, the stitching | suture structure of each panel is demonstrated in detail.

  As shown in FIG. 3 (a), the panel 18 (rear inner panel) is connected to the rear end surface of the right half airbag 12 and the left half airbag 14 in the inflating direction, and to the communication portion. 16 airbag central side surfaces. The panel 20 (rear outer panel) constitutes a surface (airbag outer surface) opposite to the rear inner panel 18.

  The panels 22 and 24 (front inner panels) are the front surface side of the right half airbag 12 and the left half airbag 14 in the inflating direction of the right half airbag 12 and the left half airbag 14 (the right half airbag 12). And the left half airbag 14).

  The panels 26 and 28 (front outer panel) constitute a surface opposite to the front inner panels 22 and 24 (airbag outer surface).

  Reference numeral 30 denotes a seam (sewing thread) obtained by sewing the rear inner panel 18 and the rear outer panel 20, and reference numerals 32 and 34 denote seams obtained by sewing the rear inner panel 18 and the front inner panels 22 and 24, respectively. Reference numerals 36 and 38 denote seams obtained by stitching the rear outer panel 20 and the front outer panels 26 and 28 together.

  Reference numeral 28 a denotes a vent hole for the left half airbag provided in the front outer panel 28. The front outer panel 26 is also provided with a vent hole 26a for the right half side airbag similar to the above (see FIG. 4).

  As shown in FIG. 1 (a), the stitching allowances (joint allowances) 44, 46 between the rear inner panel 18 and the front inner panels 22, 24 are respectively the right half airbag 12 and the left half of the airbag product. It arrange | positions so that the outer surface of the side airbag 14 may be exposed. As shown in FIGS. 1 and 2, tongue-like coupling allowances 48 and 50 (only the coupling allowance 48 is shown in FIG. 2) project from the stitching allowances 44 and 46. As shown clearly in FIG. 1, particularly FIG. 1 (b), the connecting portions 48 and 50 are stitched together by the seam 52 to form the connecting portion 70.

  Thus, the right half airbag 12 and the left half airbag 14 are in the inflating direction of the facing portions of the rear inner panel 18 and the front inner panels 22 and 24 through the stitching allowances 44 and 46. The middle parts of are connected.

  In this embodiment, the distance from the rear end 10e of the inflated airbag to the connecting portion 70 is preferably 30 to 70%, particularly about 40 to 55% of the length L in the front-rear direction of the inflated airbag 10.

  The rear outer panel 20 constituting the outer surface of the communication portion 16 is provided with a pair of slits 54 and 54 for inserting an inflator. In this embodiment, as shown in FIGS. 1 (a) and 1 (b), a rod-shaped inflator 56 is used. The rod-like inflator 56 is inserted into the slits 54 and 54 so as to penetrate the communication portion 16 in the vehicle width direction, and both end portions of the inflator 56 are disposed outside the airbag 10.

  The airbag 10 is installed in an airbag device for protecting an occupant in the event of a vehicle collision. This airbag device has a case 2 having a lidless box shape for accommodating the airbag 10, and the airbag 10 is connected to the case 2 (see FIGS. 4 to 11). Reference numeral 58 in FIG. 1B denotes a hole through which a fixing tool (not shown) such as a bolt for connecting the airbag 10 to the case 2 is inserted. Both ends of the inflator 56 are also attached in this case.

  The airbag 10 is folded and accommodated in the case 2, and a cover (not shown) such as a lid is attached to the case 2 so as to cover the folded body of the airbag 10, thereby configuring an airbag device. . The lid is torn by the pressing force from the airbag 10 when the airbag 10 is inflated.

  This airbag apparatus is installed on the upper surface of the instrument panel 1 in front of the passenger seat of an automobile (see FIGS. 12 to 14).

  Hereinafter, the folding procedure of the airbag 10 will be described with reference to FIGS. In order to make the drawings easier to see, FIGS. 8 to 11 are shown at a scale of about 1.2 times that of FIGS. 4 to 7.

  As shown in FIG. 4, the airbag 10 is first flat so that the opposing surfaces of the right half airbag 12 and the left half airbag 14 (surfaces connected by the connecting portion 70) overlap each other. To be spread. Then, the leading end side of the right half airbag 12 and the left half airbag 14 is separated from each other along the fold line A along the connecting portion 70 as shown in FIG. Folded.

  Next, the base end side of the airbag 10 relative to the fold line A is halfway between the connecting portion 70 and the base end side of the right half airbag 12 and the left half airbag 14 as shown in FIG. And the fold lines C of the right half airbag 12 and the left half airbag 14 are folded apart from each other.

  That is, the right-half airbag 12 and the left-half airbag 14 are formed such that the portions between the fold lines B and C are mutually aligned along the fold line B between the fold line C and the base end side. While being folded away, the folding line C is folded along the folding line C so that the portions between the folding lines C and A approach each other. The distance from the rear end 10e of the airbag 10 to the fold line B is preferably about 20 to 40% of the distance from the rear end 10e to the connecting portion 70. The fold line C is located in the vicinity of the middle between the fold line B and the fold line A (the connecting portion 70).

  By this folding, as shown in FIG. 7, the fold lines A and B of the right half airbag 12 are overlapped, and similarly, the fold lines A and B of the left half airbag 14 are overlapped. . In addition, the portion between the fold lines B and C and the portion between the fold lines C and A of the right half airbag 12 and the left half airbag 14 are overlapped.

  Next, as shown in FIG. 8 and FIG. 9, the leading end side overlapping bodies of the right half airbag 12 and the left half airbag 14 are directed from the fold line C to the fold lines A and B, respectively. And rolled. At this time, the front end-side stacked body is roll-folded so that the surfaces facing the base end sides of the right half airbag 12 and the left half airbag 14 are wound inside. That is, as shown in FIG. 12, the front end-side overlap body of the right half airbag 12 is roll-folded counterclockwise as viewed from above, and the front end-side overlap body of the left half airbag 14 is Rolled clockwise when viewed from the top.

  Then, as shown in FIGS. 9 and 10, the fold line B and the rear end 10e (see FIGS. 9 and 10) are located on the proximal side from the fold line B of the right half airbag 12 and the left half airbag 14, respectively. Is folded along the folding lines D and E in the middle of the case (not shown) and overlapped with the front opening 2 a of the case 2.

  In this way, the primary folded body 10A of the airbag 10 elongated in the vertical direction (substantially left-right direction in FIG. 11) as shown in FIG. 11 is formed.

  The primary folded body 10A is made the final folded body by being secondarily folded so that the size in the vertical direction decreases from the upper end and the lower end toward the opening 2a of the case 2, respectively. Thereafter, the final folded body is accommodated in the case 2 through the opening 2a, and the lid is attached to the case 2 so as to close the opening 2a.

  In the secondary folding, the upper and lower ends of the primary folded body 10A may be roll-folded or bellows-folded.

  In this airbag device, the gas is ejected from the inflator 56 into the communicating portion 16 when the vehicle collides. The gas from the inflator 56 flows into the right half airbag 12 and the left half airbag 14 from the communication portion 16, and the right half airbag 12 and the left half airbag 14 are respectively occupant by the gas. Inflate on the front right and left sides.

  In the airbag 10, as described above, the primary folded body 10 </ b> A is first elongated vertically, and then the secondary folded body is used as the final folded body. Therefore, the inflator 56 is actuated to operate the final folded body. When the gas is supplied to the body, the secondary folding is released, and the right half airbag 12 and the left half airbag 14 are inflated relatively early and then inflated toward the occupant. For this reason, the size (first contact area) of the first contact surface with the occupant is wide.

  In this embodiment, the leading end side of the right half airbag 12 and the left half airbag 14 is roll-folded in the primary folding of the airbag 10, and the roll folding of the right half airbag 12 is viewed from above. Thus, the left half airbag is folded clockwise when viewed from above. Therefore, when the airbag 10 is inflated, as shown in FIGS. 12 and 13, the right half airbag 12 approaches the right chest so as to wrap the right chest from the right front of the occupant's right chest, The airbag 14 approaches from the left front of the left chest of the occupant so as to wrap the left chest. As a result, as shown in FIGS. 14 (a) and 14 (b), the head of the occupant is also received by the airbag 10 so as to be sandwiched from the left and right fronts.

  In this embodiment, since the airbag 10 is folded bellows from the folding line B in the primary folding, the airbag 10 is inflated quickly when the airbag 10 is inflated. Then, the front end sides of the right half airbag 12 and the left half airbag 14 that are rolled are inflated so as to wrap the occupant from the left and right front of the occupant.

  In the airbag 10, when the right half airbag 12 and the left half airbag 14 are inflated from the folded state at the time of housing, either one of the airbags 12 or 14 is Even if the inflation of the other airbag 14 or 12 is delayed in advance, the right half airbag 12 and the left half airbag 14 are connected to each other. The bag pulls the other airbag, which is delayed in inflation, to promote its inflation. In addition, since the right half side airbag 12 and the left half side airbag 14 are connected to each other in the middle of the inflating direction by the connecting portion 70, one of the airbags that has started inflating in advance is After the start of inflation, the other airbag, which is delayed in inflation at a relatively early stage, starts to be pulled in the inflation direction. Accordingly, both the right half airbag 12 and the left half airbag 14 are inflated smoothly and substantially equally from the initial stage of inflation.

  In a state where the airbag 10 has been inflated, a space portion 13 is formed between the front end portions of the right half airbag 12 and the left half airbag 14, and the space portion 13 is open toward the occupant. . The expanded right half airbag 12 receives the right chest of the occupant, the expanded left half airbag 14 receives the left breast, and the vicinity of the sternum faces the space portion 13. For this reason, the reaction force applied to the vicinity of the sternum when the airbag is received is small.

  The airbag 10 is manufactured by the following procedure.

  First, as shown in FIG. 3 (a), the rear inner panel 18 and the front inner panels 22 and 24 are stitched together by the seams 32 and 34, and the rear outer panel 20 and the front outer panels 26 and 28 are stitched together by the seams 36 and 38. To do. At this time, stitching allowances 44 and 46 between the rear inner panel 18 and the front inner panels 22 and 24 are arranged on the side exposed to the outside of the airbag in the airbag product.

  In this embodiment, in the stitching allowance 44 between the rear inner panel 18 and the front inner panel 22, as shown in FIG. 3 (b), the rear inner panel 18 and the front inner panel 22 Only the both ends of the seam allowance 44 are sewn by seams 32 (32a, 32b), and an opening 60 for inverting the airbag is formed between the seams 32a, 32b.

  Next, the rear inner panel 18 and the front inner panels 22 and 24 are sewn together, and the rear outer panel 20 and the front outer panels 26 and 28 so that the surfaces exposed to the outside of the airbag face each other in the state of the airbag product. Are stitched together by seams 30, 40, and 42 so as to go around the periphery. Thereby, an inverted airbag product intermediate is produced.

  Next, the airbag product intermediate body is turned upside down through the opening 60 formed in the seam allowance 44. Thereafter, the joints 48 and 50 of the stitching allowances 44 and 46 are stitched together by the seam 52, whereby the airbag 10 product is completed.

  Note that the opening 60 is closed by the seam 52 when the coupling margins 48 and 50 are stitched together.

  By configuring the airbag 10 from a plurality of panels as described above, the outer surface of the airbag 10 having a large area and a complicated shape can be manufactured without waste from a relatively small area panel.

  In this embodiment, the right half airbag 12 and the left half airbag 14 are connected by substantially connecting the seam allowances 44 and 46 between the rear inner panel 18 and the front inner panels 22 and 24. This eliminates the need to use a tie panel that connects the right half airbag 12 and the left half airbag 14 separately from the panels 18, 22, 24, etc., and reduces the construction cost of the airbag 10. .

  In this embodiment, a pair of slits 54, 54 are provided as inflator openings in the rear outer panel 20 of the communication portion 16, and rod-like inflators 56 are inserted into these slits 54, 54 so that the inflator 56 is connected to the communication portion 16. It is placed inside. Thus, when the opening for inflators is made into a slit shape, the connection strength of the inflator 56 to the airbag 10 is high.

  In this embodiment, since the airbag product reversing opening 60 is provided in the seam allowance 44 as described above in the air bag manufacturing process, it is difficult to reverse the air bag product intermediate from the vent hole or inflator opening. Even in this case, particularly when the inflator opening has a slit shape as in this embodiment, the airbag product intermediate can be easily reversed through the opening 60.

  Since the opening 60 is closed by the seam 52 when the coupling allowances 48 and 50 are stitched together, the gas introduced from the inflator 56 into the right half airbag 12 and the left half airbag 14 is the opening 60. Will not leak out.

  15 to 17 are explanatory views of the airbag inflating operation of the airbag apparatus according to another embodiment. FIG. 17 (a) shows a case where the front end portions of the left half airbag and the right half airbag hit the occupant, and FIG. 17 (b) shows the left half airbag and the right half airbag. Shows when the expansion is completed.

  In this embodiment, in the primary folding of the airbag 10, instead of roll-folding the front end side of each of the right half airbag 12 and the left half airbag 14, the right half airbag 12 and the left half The side airbag 14 is bellows folded from the base end side to the tip end side to form a primary folded body that is elongated in the vertical direction. When the right-half airbag 12 and the left-half airbag 14 are accordion-folded, as shown in FIG. 15, when the airbag 10 is a primary folded body, , 14t are folded so as to be directed in directions away from each other.

  The airbag 10 that has been primarily folded in this manner is further folded into a final folded body in the same manner as in the embodiment shown in FIGS. 1 to 11, and then accommodated in the case 2 of the airbag apparatus. Is done. The other structure of this airbag apparatus is the same as that of the airbag apparatus of FIGS. 1-11, and the same code | symbol as FIGS. 1-11 has shown the same part in FIGS. 15-17.

  Also in this embodiment, the airbag device is installed on the upper surface of the instrument panel 1.

  Even in this airbag apparatus, the airbag 10 is first formed into a folded body elongated in the up-down direction, and then the second folded body is used as the final folded body. When the gas is supplied to the vehicle, the secondary folding is released, and the right half airbag 12 and the left half airbag 14 are inflated relatively quickly, and then inflated toward the occupant. For this reason, the first contact area where the occupant is first contacted is wide.

  In this embodiment, since the right half airbag 12 and the left half airbag 14 are bellows folded from the distal end side to the proximal end side to form a primary folded body, the right half airbag The 12 and left half airbags 14 are inflated so as to receive the right and left chests of the occupant from the front, respectively, when the secondary folding is released and inflated toward the occupant.

  In this embodiment, the right-half airbag 12 and the left-half airbag 14 are folded so that the leading ends 12t and 14t are directed away from each other when the primary folded body is used. It is. Therefore, as shown in FIG. 17 (a), the right half airbag 12 and the left half airbag 14 are inflated to the final stage (stage where the leading edge 12t and 14t are inflated). When reaching, the leading ends 12t and 14t of the right half airbag 12 and the left half airbag 14 are inflated so as to approach the occupant's head from the left and right front, respectively. As a result, the head of the occupant is received by the airbag 10 so as to be sandwiched from the left and right fronts.

  In the present invention, the secondary folding may be performed so that the upper half side and the lower half side of the airbag primary folded body are separately folded. Thereby, it becomes possible to arbitrarily adjust the amount of the upper half of the airbag folded and the amount of the lower half. Then, for example, the primary folding is performed such that the amount of the upper half side is larger than the amount of the lower half side as in the primary folding body 10B of FIG. 18, and then the upper half side and the lower side of the primary folding body are made. By performing secondary folding so that the half side is folded separately, the upper half side of the left half airbag and the right half airbag is expanded more than the lower half side in the initial stage of airbag inflation. . As a result, the occupant-facing surfaces of the left half airbag and the right half airbag become relatively vertical and approach the occupant, so that the first contact area is increased.

  Of course, in the present invention, depending on the arrangement conditions of the airbag device, the folding may be performed so that the amount of the lower half of the airbag folded body is larger than the amount of the upper half. Folding may be performed so that the amount on the lower half is equal to that on the lower half.

  When the primary folding body is folded so that the amount on the upper half side of the primary folding body is larger than the amount on the lower half side, the primary folding is first performed as in the final folding body 10C of FIG. It is preferable that the lower half side of the folded body is folded and then the upper half side is folded, and the folded body on the upper half side is arranged above the folded body on the lower half side. In this case, when the airbag is inflated, the lower half side is inflated to push the upper half side upward, and the upper half side is inflated.

  FIG. 18 (a) is a perspective view of the airbag primary folded body 10B folded so that the amount on the upper half side is larger than the amount on the lower half side, and FIG. It is BB sectional drawing of the same (a). FIG. 19 is a cross-sectional view showing the final folded body 10C that has been secondarily folded so that the upper half folded body is disposed above the lower half folded body of the primary folded body 10B.

  Also in the airbag apparatus of FIGS. 18 and 19, the airbag 10 has an inflator 56 disposed in the communication portion 16 on the base end side as shown in the figure, and the rear end portion of the communication portion 16 is the It is connected to the case 2 together with the inflator 56.

  In this embodiment, the right-half airbag 12 and the left-half airbag 14 are bellows folded from the distal end side to the proximal end side in a state where the right and left side surfaces are spread flat so that the left and right side surfaces overlap each other. As a result, a primary folded body 10B elongated in the up-down direction (substantially left-right direction in FIG. 18) is formed. In this primary folding body, the amount of the upper half side 10a of the primary folding body 10B (the amount used for secondary folding after the primary folding) is larger than the amount of the lower half side 10b. In addition, the case 2 is arranged at a position close to the lower end from the middle in the vertical direction of the primary folded body 10B.

  The amount of the upper half side 10a of the primary folded body 10B is preferably about 1.5 to 2.5 times the amount of the lower half side 10b.

  In this primary folding, the right half airbag 12 and the left half airbag 14 are oriented in the direction in which the respective leading ends 12t and 14t are separated from each other when the primary folded body 10B is used. It is folded in.

  In the secondary folding, the lower half side 10b of the primary folded body 10B is first roll-folded, and then the upper half side 10a is roll-folded, and the folded body of the upper half side 10a is folded into the folded body of the lower half side 10b. It is set as the final folding body 10C by arrange | positioning above.

  In this secondary folding, the lower half side 10b of the primary folded body 10C is roll-folded so that the rear surface (surface on the case 2 side) is wound inside. Moreover, the upper half side 10a is roll-folded so that the front surface (surface opposite to the surface on the case 2 side) is wound inside. In this way, when the airbag is inflated, the lower half side 10b is inflated so as to press the lower half side 10b itself against the folded body of the upper half side 10a. Further, the upper half side 10a expands smoothly without being caught by vehicle body components such as a windshield (not shown).

  Also in this embodiment, the final folded body 10C is accommodated in the case 2, and the front opening 2a of the case 2 is closed by a cover such as a lid (not shown) to constitute an airbag device. .

  The other structure of this airbag apparatus is the same as that of the said airbag apparatus of FIGS. 1-3, and the same code | symbol as FIGS. 1-3 is shown the same part in FIGS.

  Even in this airbag device, the airbag 10 is first formed into a primary folded body 10B that is elongated in the vertical direction, and then is folded into a final folded body 10C, so that the inflator 56 performs gas ejection operation. When the gas is supplied to the final folded body 10C, the secondary folding is released, and the right half airbag 12 and the left half airbag 14 are inflated in a vertical direction relatively early, and then toward the occupant. Expands. For this reason, the first contact area where the occupant is first contacted is wide.

  In this airbag apparatus, when gas is supplied into the final folded body 10C and the upper half side 10a and the lower half side 10b of the airbag 10 are inflated, the airbag apparatus is disposed below the upper half side 10a. Since the folding of the lower half side 10b expands while pushing up the upper half side 10a, the upper half side 10a is promoted to expand.

  Further, in this airbag device, in the secondary folding of the airbag 10, the amount of the upper half side 10a is folded so as to be larger than the amount of the lower half side 10b. The upper half side 10a expands more than the lower half side 10b. As a result, the occupant-facing surfaces of the right half airbag 12 and the left half airbag 14 approach the occupant as a surface that is relatively close to the vertical, so that the first contact area is further widened.

  In this embodiment, since the right half airbag 12 and the left half airbag 14 are bellows folded from the distal end side to the proximal end side to form a primary folded body, the right half airbag The 12 and left half airbags 14 are inflated so as to receive the right and left chests of the occupant from the front, respectively, when the secondary folding is released and inflated toward the occupant.

  In this embodiment, the right half airbag 12 and the left half airbag 14 are folded so that the leading edges 12t and 14t are directed away from each other when the primary folded body is used. Therefore, when the inflation of the right half airbag 12 and the left half airbag 14 reaches the final stage, the leading ends 12t and 14t of the right half airbag 12 and the left half airbag 14 are respectively left and right. It expand | swells so that it may approach a passenger | crew's head from the front of a passenger | crew, and comes to catch a passenger | crew's head so that it may be pinched | wrapped from the front of right and left.

  In addition, how to fold the primary fold so that the amount on the upper half side is larger than the amount on the lower half side, and the upper half side and the lower half side of the primary folded body thus folded Each of the folding methods may be different from those described above.

  The above embodiment shows an example of the present invention, and the present invention is not limited to the illustrated embodiment. For example, in the above-described embodiment, the right half airbag 12 and the left half airbag 14 are continuous on the base end side, but the two bags may be separated. The right half airbag and the left half airbag may be configured to be inflated by separate inflators. The middle portions of the right half airbag and the left half airbag may be connected by a panel, string, net, or the like.

  In the present invention, the right half airbag and the left half airbag may be symmetric or asymmetric. Moreover, the volume of the right half airbag and the left half airbag may be the same or different.

  In the present invention, as shown in FIG. 20, the upper portion of the bag is arranged so that the side bag (the right airbag 12A in FIG. 20) arranged on the A pillar side does not contact the A pillar, the windshield, or the side window as much as possible. You may comprise so that may be inclined in a vehicle interior.

  In the present invention, as shown in FIG. 21, the airbags (the right half airbag 12A and the left half airbag 14B) may have an inflated shape in which the left-right width decreases toward the top.

  An airbag 10 ′ according to another embodiment will be described with reference to FIGS. 22 and 23. 22 (a) is a perspective view of the airbag 10 ′ in an inflated state, FIG. 22 (b) is a sectional view taken along the line BB of FIG. 22 (a), and FIG. 23 is FIG. It is sectional drawing which follows the XXIII-XXIII line of figure (b).

  In the airbag 10 ', the right half airbag 12 and the left half airbag 14 are respectively provided in the width direction as width regulating means for regulating the width in the left-right direction during inflation. An extended hanging strap 80 is provided. The hanging strap 80 is a front inner panel that constitutes the left and right side surfaces of the right half airbag 12 and the left half airbag 14 inside the right half airbag 12 and the left half airbag 14, respectively. 22 and 24 and front outer panels 26 and 28 are connected, respectively. Both ends of the hanging strap 80 are joined to the panels 22 to 28 by seams 82.

  In the airbag 10 ′, the facing portions of the right half airbag 12 and the left half airbag 14 are connected to each other by a connecting belt 88 as a panel-like connecting body. Both ends of the connecting belt 88 are sewn to the bags 12 and 14.

  In this embodiment, the connecting belt 88 and the hanging straps 80, 80 in the bags 12, 14 are arranged in a straight line in a state where the airbag 10 'is inflated. For this reason, the expansion shape of the bags 12 and 14 is not distorted, and each bag 12 and 14 is reliably expanded to the target shape.

  In this embodiment, the tongue-like connection allowances 48 and 50 shown in FIGS. 1B and 2 are omitted, and the bags 12 and 14 are not connected in the vicinity of the seams 32 and 34. Other configurations of the airbag 10 'are the same as those of the airbag 10 shown in FIGS. 1 to 3, and the same reference numerals denote the same parts.

  The connecting belt 88 is disposed in such a manner that the airbag device for the passenger seat having the airbag 10 ′ is installed on the upper surface of an instrument panel (hereinafter abbreviated as instrument panel) of the automobile, and the airbag 10 ′ is completely inflated. In such a state (but not in contact with the occupant), it is preferably a position that is separated by 200 to 230 mm as a horizontal distance from the rear end of the instrument panel (the rearmost part in the vehicle longitudinal direction) to the rear of the vehicle. Further, the vertical position is preferably within 500 mm from the seat surface of the passenger seat, for example, about 400 to 500 mm, in the above-described expanded state.

  The vertical width of the connecting belt 88 and the hanging strap 80 is preferably about 100 to 140 mm, for example, about 120 mm. When the connecting belt 88 and the hanging strap 80 are sewn to the bags 12 and 14, the distance from the highest stitch to the lowest stitch is preferably about 90 mm.

  The connecting belt 88 and the hanging strap 80 are provided so that the belt surfaces are in the vertical direction in FIGS. In this way, compared with the case where the belt surface is horizontal, the stress generated in the sewn portions of the bags 12, 14 and the connecting belt 88 and the hanging strap 80 in the initial stage of inflation of the airbag 10 'is reduced.

  The reason for this will be described with reference to FIG. FIG. 24 is a perspective view of the sewn portion between the hanging strap 80 and the panel 28, (a) shows an example of the present invention in which the belt surface is substantially vertical, and (b) is a substantially horizontal belt surface. A comparative example with direction is shown.

  The hanging strap 80 includes a main body portion 80a and a sewing margin 80b on the distal end side, and the sewing margin 80b is sewn to the panel 28 by a suture thread 82 (82a, 82b, 82c). The threads 82a to 82c are perforated lines extending in a direction parallel to the belt surface of the hanging strap main body 80a. The thread 82a is farthest from the main body 80a, the thread 82c is closest to the main body 80a, and the thread 82b is located between the two.

  In general, when the airbag 10 'is inflated, the airbag 10' starts to inflate from the base end side which is the inflator side. At the moment when the hanging straps 80 in the bags 12 and 14 are taut as the bags are inflated, the moving inertia force to the side of the panel 28 is applied to the sewn portion of the hanging strap 80 and the panel 28 at a time. At this moment, a remarkably large force Force acts on the sewn portion.

  When the belt surface is horizontal as shown in FIG. 24 (b), the force Force is first applied to the vicinity of the edge 80R on the bag proximal end side among the yarns 82a to 82c. The force Force acts near the edge 80T. At the moment when the force Force acts in the vicinity of 80R, the force Force acts locally only on the R side of the seam allowance 80b, so that the 80R side of the seam allowance 80b tends to turn in the direction of the arrow θ. For this reason, in order to sufficiently counter this local stress, it is necessary to make the sewing on the 80R side strict.

  On the other hand, in FIG. 24 (a) in which the belt surface is substantially vertical, the yarn 82c and further the yarns 82a and 82b are applied even when the force Force is applied to the hanging strap main body 80a when the bag is inflated. This force will counter this force. Since the stress is dispersed in this way, the sewing of the threads 82a to 82c is simpler than that shown in FIG. 24 (b).

  FIG. 24 relates to the relationship between the hanging strap 80 and the panel 28, but the same applies to the case of the hanging strap 80 and the other panels 22, 24, 26, and the case of the connecting belt 88 and the panels 22, 24. .

  Thus, simplification of the sewing work of the hanging strap 80 and the connecting belt 88 is realized by setting the belt surface in the vertical direction.

  When the belt surfaces of the hanging strap 80 and the connecting belt 88 are set in the vertical direction, when the bags 12 and 14 are folded along the folding line A as shown in FIG. Can be set along the line and can be easily folded. That is, the bags 12 and 14 can be easily folded along the belt surface, and the folding position is also accurate.

  Next, the procedure for folding the airbag 10 'will be described with reference to FIGS. The primary folding of the airbag 10 'is as shown in FIGS.

  FIG. 25 is a perspective view of a primary folded body of the airbag 10 '. As shown in FIG. 25, the distance between the lower end of the connecting belt 88 and the passenger side 2j of the case 2 is preferably about 50 mm (for example, 40 to 60 mm).

  As shown in FIGS. 25 to 26, the passenger side of the primary folded body is folded back to the windshield side along the case passenger side 2j. Next, as shown in FIGS. 26 to 27, the occupant side of the primary folded body is roll-folded three times along the folding lines F, F, F to form a roll portion 10'r.

  Next, as shown in FIGS. 27 to 28, the windshield side of the primary folded body is folded back to the occupant side along the folding line G passing through the center of the connecting belt 88. Further, as shown in FIGS. 28 to 29, the case 2 is folded back along the folding line H along the occupant side 2j of the case 2.

  Next, as shown in FIGS. 29 to 30, the windshield side of the primary folding body is rolled three times to the occupant side along the folding line I, and then housed in the case 2 as shown in FIG. . Thereafter, the lid is attached to the case 2. The folded body of the airbag 10 'folded in this way is symmetrical.

  The folding procedure shown in FIGS. 25 to 31 is an example, and other procedures may be used.

It is a lineblock diagram of an airbag concerning an embodiment of the invention. It is sectional drawing which follows the II-II line of FIG. It is a disassembled perspective view and the principal part enlarged view of the airbag of FIG. It is a perspective view which shows the folding procedure of the airbag of FIG. It is a perspective view which shows the folding procedure of the airbag of FIG. It is a perspective view which shows the folding procedure of the airbag of FIG. It is a perspective view which shows the folding procedure of the airbag of FIG. It is a perspective view which shows the folding procedure of the airbag of FIG. It is a perspective view which shows the folding procedure of the airbag of FIG. It is a perspective view which shows the folding procedure of the airbag of FIG. It is a perspective view which shows the folding procedure of the airbag of FIG. It is a top view which shows the expansion action | operation of the airbag of FIG. It is a top view which shows the expansion action | operation of the airbag of FIG. It is a top view which shows the expansion action | operation of the airbag of FIG. It is a top view which shows the inflation operation | movement of the airbag of the airbag apparatus which concerns on another embodiment. It is a top view which shows the inflation operation | movement of the airbag of the airbag apparatus which concerns on another embodiment. It is a top view which shows the inflation operation | movement of the airbag of the airbag apparatus which concerns on another embodiment. It is a block diagram of the airbag primary folding body of the airbag apparatus which concerns on another embodiment. It is sectional drawing which shows the airbag final folding body of the airbag apparatus of FIG. It is an airbag shape explanatory drawing of the airbag apparatus which concerns on different embodiment. Furthermore, it is an airbag shape explanatory drawing of the airbag apparatus which concerns on different embodiment. It is the perspective view and horizontal sectional view of the airbag which concern on another embodiment. It is a cross-sectional perspective view which follows the XXIII-XXIII line of FIG. It is stress distribution explanatory drawing of the hanging strap sewing part in the airbag of FIG. It is explanatory drawing of the folding procedure of airbag 10 '. It is explanatory drawing of the folding procedure of airbag 10 '. It is explanatory drawing of the folding procedure of airbag 10 '. It is explanatory drawing of the folding procedure of airbag 10 '. It is explanatory drawing of the folding procedure of airbag 10 '. It is explanatory drawing of the folding procedure of airbag 10 '. It is explanatory drawing of the folding procedure of airbag 10 '.

A, B, C, D, E Folding line 1 Instrument panel 2 Case 10, 10 'Airbag 10e Airbag rear end 12, 12A, 12B Right half airbag 12t The most advanced 13 space of right half airbag 14, 14 </ b> A, 14 </ b> B Left-half airbag 14 t Front-end of left-half airbag 16 Communication portion 18 Rear inner panel 20 Rear outer panel 22, 24 Front inner panel 26, 28 Front outer panel 44, 46 Stitch allowance 48, 50 Connection Price 52 Seam 56 Inflator 70 Connecting part 80 Hanging strap 88 Connecting belt

Claims (9)

The airbag includes a folded airbag and an inflator that inflates the airbag, and the airbag inflates in a direction in which the distal end side is away from the proximal end side by the gas ejected from the inflator disposed on the proximal end side of the airbag. An airbag device,
As the airbag, in an airbag device having a left half airbag that expands on the left side in front of the occupant and a right half airbag that expands on the right side in front of the occupant,
The left half airbag and the right half airbag have their distal ends disconnected from each other, so that the distal ends of the left half airbag and the right half airbag in an inflated state. Between each other, it is configured to form a space that opens toward the occupant,
The left half airbag and the right half airbag are each folded into a primary folded body that is elongated in the vertical direction by being primarily folded, and then secondarily folded to reduce the vertical width. It is the final folded body,
At least a portion of the primary fold is a roll fold,
The roll fold of the left half airbag is clockwise when viewed from above,
The roll folding of the right-half airbag is counterclockwise when viewed from above,
Among the facing parts of the left half airbag and the right half airbag, the middle part in the inflating direction and the middle part in the vertical direction are connected by a tongue-like, panel-like, string-like or net-like connecting part. ,
During the primary folding,
The front end side of the connecting portion of the left half airbag and the right half airbag is folded in a direction away from each other along a folding line A in the vertical direction along the connecting portion.
The base end side of the left half airbag and the right half airbag with respect to the fold line A is a vertical fold line C in the middle between the connecting portion and the base end side, and each fold line C. Are folded along the folding line B in the vertical direction on the way to the base end side so that the folding lines C are separated from each other,
Accordingly, the base end side of the left half airbag and the right half airbag with respect to the fold line A is along the fold line C so that the portions between the fold lines C and A are mutually connected. Folded in the approaching direction, and folded along the fold line B in a direction in which the portions between the fold lines B and C are separated from each other.
Thereby, the fold lines A and B of the left half airbag are overlapped with each other, and the portion of the left half airbag from the fold line A to the tip side, the portion between the fold lines B and C, and the fold A portion between the lines C and A is overlapped to form a front end-side overlap body, and the fold lines A and B of the right half airbag are overlapped with each other, and from the fold line A of the right half airbag. The tip side part, the part between the fold lines B and C, and the part between the fold lines C and A are overlapped to form a tip side overlapped body,
The front end side overlapped body of the left half side airbag is roll-folded from the fold line C toward the fold lines A and B, and the front end side overlapped body of the right half side airbag is folded. The roll is folded from the line C side toward the folding lines A and B,
An airbag device, wherein a base end side of the fold line B is bellows-folded . The airbag includes a folded airbag and an inflator that inflates the airbag, and the airbag inflates in a direction in which the distal end side is away from the proximal end side by the gas ejected from the inflator disposed on the proximal end side of the airbag. An airbag device,
As the airbag, in an airbag device having a left half airbag that expands on the left side in front of the occupant and a right half airbag that expands on the right side in front of the occupant,
The left half airbag and the right half airbag have their distal ends disconnected from each other, so that the distal ends of the left half airbag and the right half airbag in an inflated state. Between each other, it is configured to form a space that opens toward the occupant,
The left half airbag and the right half airbag are each folded into a primary folded body that is elongated in the vertical direction by being primarily folded, and then secondarily folded to reduce the vertical width. It is considered as the final folding body
The primary folding Ri accordion folded der, and when folding bellows the left airbag section and the right airbag, left airbag and the right airbag when it is the primary folded bodies The airbag apparatus is folded so that the leading edges of the two are oriented in directions away from each other . In Claim 2, the middle part of the said expansion direction and the middle parts of an up-down direction among the facing parts of this left half side airbag and this right half side airbag are tongue piece shape, panel shape, string shape, or net shape. The airbag device is connected by a connecting portion.   The airbag device according to any one of claims 1 to 3, wherein the secondary folding is performed by separately folding the upper half side and the lower half side of the primary folded body.   5. The airbag device according to claim 4, wherein the amount on the upper half side is larger than the amount on the lower half side.   In any one of Claims 1 thru | or 5, the base end sides of this left half side airbag and right half side airbag are connected, and these left half side airbag and right half side airbag are common. An airbag device that is inflated by an inflator. In any one of Claims 1 thru | or 6 ,
A suspension strap is installed between the panels of the left half airbag and the right half airbag to restrict the width in the left-right direction when the left half airbag and the right half airbag are inflated. An airbag device characterized by being provided. In claim 7 ,
And facing portion between a middle portion of the expansion direction of the left airbag section and the right airbag section are connected by a connecting member extending in the connecting direction of the two,
The airbag device, wherein the hanging strap and the connecting body are arranged in a straight line when the airbag is inflated. 9. The connecting body according to claim 8 , wherein the connecting body has a panel shape, the hanging strap has a belt shape, and the panel surface of the connecting body and the belt surface of the hanging strap are flush with each other when the airbag is inflated. An airbag device is provided as described above.

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