JP2013014315A - Airbag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a structure for totally covering a folded airbag with a sheet-like member by more simple joining work.SOLUTION: An airbag device 20 is built into an airbag built-in panel (such as an instrument panel 10) having a lid 12 which can be split and opened. The airbag device includes: an inflator 22; an airbag 30 that is folded to be able to be disposed on the inner side of the lid 12 and can be inflated and expanded into a bag-like shape by a gas introduced from the inflator 22; and an outer bag 40 for covering the folded airbag 30. The outer bag 40 is formed with a sheet-like member 42 having an inflator mounting hole 43 formed therein. The sheet-like member 42 is formed into a tube-like shape in such a manner that both ends thereof are overlapped with each other and is formed into a bag-like shape by joining both side parts of the sheet-like member 42 together to close both tube-like shaped end openings.

Description

  The present invention relates to an airbag device that inflates and deploys to protect an occupant when a vehicle collides.

  The airbag device for the passenger seat is disposed in the instrument panel in a normal state. In the event of a vehicle collision or the like, the airbag protects the occupant by opening the lid provided on the instrument panel to inflate and deploy.

  In the airbag apparatus as described above, the airbag is surrounded by a plate made of resin or metal so that the airbag is inflated and deployed in the instrument panel in the direction of splitting the lid. For this reason, the airbag device tends to increase in weight.

  Therefore, Patent Documents 1 to 3 disclose a configuration in which a plate surrounding the folded airbag is omitted or reduced in weight by covering a part or the whole of the folded airbag with a cloth or the like. Yes.

JP 2011-93446 A Special table 2008-544920 International Publication No. 2009/008221

  By the way, in order to cover the folded airbag with a cloth, it is necessary to sew the cloth into a bag shape. However, in the configurations disclosed in Patent Documents 1 to 3, since it is necessary to sew adjacent side wall portions at a large number of locations, the sewing work is troublesome.

  Moreover, it is preferable to cover the airbag more completely depending on how the airbag is folded. In the configurations disclosed in Patent Documents 1 to 3, in order to cover the folded airbag more completely, it is necessary to sew more places.

  Then, an object of this invention is to enable it to obtain the structure which entirely covers the airbag folded by the sheet-like member by simpler joining operation | work.

  In order to solve the above-described problem, a first aspect is an airbag device incorporated in an airbag assembly panel having a lid that can be split open, and an inflator capable of generating gas inside the lid, and the lid An air bag that is folded into a state in which it can be disposed inside and can be inflated and deployed in a bag shape by gas introduced from the inflator, and a sheet-like member in which an inflator mounting hole is formed. Is formed in a cylindrical shape so that both ends thereof are overlapped, and both side portions of the sheet-like member are joined so as to close the opening portions of the cylindrical ends, and the inflator is attached to the peripheral portion of the inflator mounting hole An outer bag that covers the airbag folded in an attached state and has a breakable line that is easily broken at a position inside the lid. Equipped with a.

  A 2nd aspect is an airbag apparatus which concerns on a 1st aspect, Comprising: One end part of the said sheet-like member is a bottom part which has the said inflator attachment hole, The other end part of the said sheet-like member is the said sheet-like member The other end portion of the sheet-like member is fixed to a fixed portion between the peripheral portion of the inflator mounting hole and the inflator.

  A 3rd aspect is an airbag apparatus which concerns on a 1st or 2nd aspect, Comprising: The extending direction of the junction part of the both sides of the said sheet-like member is the said airbag which expands and expands by opening the said lid The break line is formed between the end portions where the joint portions on both side portions of the sheet-like member reach the lid side.

  A 4th aspect is an airbag apparatus which concerns on any one 1st-3rd aspect, Comprising: The said outer bag is folded so that a rectangular parallelepiped box shape may be made.

  A 5th aspect is an airbag apparatus which concerns on any one 1st-4th aspect, Comprising: The said fracture | rupture line is formed in the position facing the said inflator attachment hole.

  A sixth aspect is the airbag device according to any one of the first to fifth aspects, wherein a part of the outer bag stands on the outer periphery of the airbag being inflated and deployed and the lid. It is arrange | positioned so that it can pinch | interpose between the provided lid side surrounding wall parts.

  A seventh aspect is an airbag device according to any one of the first to sixth aspects, wherein the outer bag is attached to both side portions of the sheet-like member and attached to the airbag. Further, the folded airbag is covered by being inverted so as to cover the folded airbag in a state where the inflator is disposed at the peripheral portion of the inflator mounting hole.

  An eighth aspect is the airbag device according to any one of the first to seventh aspects, further comprising an inflator fixing member fixed to the inflator and fixable to a vehicle body side member, and the inflator fixing member Is fixed to the vehicle body side member, so that the inflator is fixed at a fixed position inside the lid.

  A ninth aspect is the airbag device according to any one of the first to eighth aspects, covers the airbag folded inside the outer bag, and breaks when the airbag is inflated and deployed. Further possible auxiliary wrap members are provided.

  A 10th aspect is an airbag apparatus which concerns on any one 1st-9th aspect, Comprising: The said outer bag is attached to the said airbag.

  An eleventh aspect is the airbag device according to the tenth aspect, wherein the outer bag is attached to the airbag around the inflator attachment hole.

  A twelfth aspect is the airbag device according to the eleventh aspect, wherein the outer bag is attached to the airbag via a circular joining portion surrounding the inflator attachment hole.

  A thirteenth aspect is an airbag device according to the eleventh aspect, wherein the outer bag is folded so as to form a rectangular parallelepiped box shape, and the surface on which the inflator mounting hole is formed in the outer bag. The outer bag is attached to the airbag via rectangular joints along the four sides around the bag.

  A fourteenth aspect is an airbag device according to any one of the first to thirteenth aspects, and is connected to the inflator and a lid-side peripheral wall portion erected on the outer periphery of the lid, The apparatus further includes a belt that holds the inflator at a fixed position inside the lid.

  A fifteenth aspect is an airbag apparatus according to the fourteenth aspect, wherein one end of the belt is joined to an inflator, and the other end of the belt passes through an attachment hole formed in the lid side peripheral wall. Are joined to the outer bag.

  A sixteenth aspect is the airbag device according to the fourteenth aspect, wherein a longitudinal intermediate portion of the belt is passed through an attachment hole formed in the lid side peripheral wall portion, and both end portions of the belt are the inflator. It is joined to.

  A seventeenth aspect is an airbag apparatus according to the fourteenth aspect, wherein one end of the belt is joined to the inflator, and the other end of the belt is engaged with the lid side peripheral wall part via a hook part. It is fixed.

  An eighteenth aspect is the airbag device according to any one of the first to seventeenth aspects, wherein the outer bag breaks the fracture line after the airbag to be inflated and deployed splits the lid. It is formed in a possible size.

  A nineteenth aspect is the airbag device according to the eighteenth aspect, wherein the length of both portions of the outer bag reaching the inflator from both sides of the breaking line is a distance between the inflator and the lid. Bigger than.

  A twentieth aspect is the airbag device according to the eighteenth or nineteenth aspect, wherein a portion including the formation portion of the breaking line is folded on the folded airbag. ing.

  A twenty-first aspect is an airbag device according to any one of the first to twentieth aspects, wherein the outer bag can extend beyond an opening formed by splitting the lid. In addition, an auxiliary slit is formed along the direction intersecting the edge of the opening formed by splitting the lid.

  A twenty-second aspect is the airbag device according to any one of the first to twenty-first aspects, wherein a length of the outer bag reaching the inflator from one side of the breaking line is the outer bag. Is longer than the length reaching the inflator from the other side of the break line.

  A twenty-third aspect is the airbag device according to the twenty-second aspect, wherein a tack portion for shortening the length of the outer bag is formed in a portion reaching the inflator from the other side of the breaking line. Has been.

  A twenty-fourth aspect is an airbag device according to the twenty-second or twenty-third aspect, wherein an auxiliary break line is formed from the break line toward one side of the break line.

  According to the airbag device of the first aspect, the sheet-like member is formed in a cylindrical shape so as to overlap both ends thereof, and both sides of the sheet-like member are closed so as to close both ends of the cylindrical shape. The outer bag is formed by joining the parts. Such an outer bag can cover the folded airbag as a whole. Therefore, the structure which entirely covers the airbag folded by the sheet-like member can be obtained by a relatively simple joining operation of joining both side portions of the sheet-like member.

  According to the second aspect, since the both sides of the sheet-like member are superposed through the inflator mounting structure, the state in which the outer bag covers the folded airbag is more reliably maintained. The

  According to the third aspect, the extending direction of the joint portion on both side portions of the sheet-like member is a direction along the main inflating and deploying direction of the airbag that inflates and deploys the lid, and the sheet-like member Since the rupture line is formed between the terminal ends where the joint portions on both sides of the member reach the lid side, the opening of the outer bag formed by breaking the rupture line when the airbag is inflated and deployed. The portion can extend toward the direction of inflation and deployment of the airbag. Thereby, it can suppress that an airbag spreads in the radial direction.

  According to the 4th aspect, the folded airbag and the outer bag which wraps it can make a rectangular parallelepiped external appearance.

  According to the fifth aspect, the airbag can be inflated and deployed to the opposite side of the inflator.

  According to the sixth aspect, a part of the outer bag is sandwiched between the airbag being inflated and deployed and the lid side peripheral wall portion, and the state surrounding the airbag is maintained. For this reason, it can suppress more reliably that an airbag spreads in a radial direction.

  According to the 7th aspect, the folded airbag can be covered easily, inverting an outer bag.

  According to the eighth aspect, the fixing structure between the inflator and the airbag built-in panel can be simplified or omitted.

  According to the 9th aspect, since the form of the folded airbag can be maintained more reliably, the outer bag covering operation can be easily performed.

  According to the 10th aspect, since the said outer bag is attached to the said airbag, an outer bag and an airbag can be handled as an integral component in the middle of manufacture of an airbag apparatus.

  According to the eleventh aspect, since the outer bag is attached to the airbag at the periphery of the inflator attachment hole, it is easy to process the outer bag after attachment. Further, since the airbag is attached to the outer bag around the inflator attachment hole, the airbag is stably inflated and deployed.

  According to the twelfth aspect, since the outer bag is attached to the airbag via the circular joining portion surrounding the inflator attaching hole, the force applied to the joining portion during the inflation and deployment of the airbag is dispersed. The outer bag and the airbag are difficult to come off.

  According to the 13th aspect, an outer bag becomes easy to maintain a rectangular parallelepiped box shape.

  According to the fourteenth aspect, the inflator can be held at a fixed position inside the lid by a lightweight configuration using a belt.

  According to the fifteenth aspect, since the other end of the belt is joined to the outer bag through an attachment hole formed in the lid side peripheral wall, the outer bag is inflated and deployed on the lid side. It becomes difficult to pull out from between the peripheral walls. Thereby, it can suppress more reliably that an airbag spreads in a radial direction.

  According to the 16th aspect, since the both ends of a belt should just be joined to an inflator, the joining structure can be simplified.

  According to the seventeenth aspect, the other end portion of the belt can be easily locked and fixed to the lid-side peripheral wall portion via the hook portion.

  According to the eighteenth aspect, after the lid is split open, the breaking line of the outer bag is broken, so that the outer bag has an opening peripheral edge formed by splitting the lid and the airbag being inflated and deployed. And the airbag can be more reliably suppressed from spreading in the radial direction.

  According to the nineteenth aspect, after the lid is split open, the breaking line of the outer bag is broken, so the outer bag is formed by splitting the lid, the peripheral edge of the opening, and the airbag being inflated and deployed. And the airbag can be more reliably suppressed from spreading in the radial direction.

  According to the twentieth aspect, the airbag to be inflated and deployed easily breaks the lid and then breaks the break line while deploying the folded portion of the outer bag. For this reason, an outer bag is pinched | interposed between the peripheral part of the opening formed by splitting a lid, and the airbag in inflate-deployed, and can suppress more reliably that an airbag spreads in the radial direction.

  According to the twenty-first aspect, a portion of the outer bag that can extend beyond the opening formed by splitting the lid is cracked by the auxiliary slit, and the lid of the airbag built-in panel is split. It becomes easy to spread in the outer periphery part of the opening formed by this. Thereby, an outer bag is pinched | interposed between the outer peripheral edge part of the said opening, and the airbag in inflate-deployed, and the state in which an outer bag surrounds the inflated-deployed airbag can be maintained more reliably.

  According to the twenty-second aspect, the direction of inflation and deployment of the airbag can be controlled.

  According to the twenty-third aspect, by forming the tack portion, the portion of the outer bag that reaches the inflator from the other side of the breaking line can be easily shortened.

  According to the twenty-fourth aspect, since the outer bag is broken at the breaking line and the auxiliary breaking line, the airbag is smoothly inflated and deployed outward from the opening of the outer bag while regulating the inflation and deployment direction of the airbag. Can be made.

It is sectional drawing which shows the whole airbag apparatus structure which concerns on embodiment. It is a perspective view which shows the state which covered the folded airbag with the outer bag. It is explanatory drawing which shows the manufacturing process of an outer bag. It is explanatory drawing which shows the manufacturing procedure of an outer bag. It is explanatory drawing which shows the manufacturing procedure of an outer bag. It is explanatory drawing which shows the manufacturing procedure of an outer bag. It is explanatory drawing which shows the manufacturing procedure of an outer bag. It is explanatory drawing which shows the process of accommodating an airbag in an outer bag. It is explanatory drawing which shows the process of accommodating an airbag in an outer bag. It is explanatory drawing which shows the process of accommodating an airbag in an outer bag. It is explanatory drawing which shows the process of accommodating an airbag in an outer bag. It is explanatory drawing which shows the process of accommodating an airbag in an outer bag. It is explanatory drawing which shows the process of accommodating an airbag in an outer bag. It is explanatory drawing which shows operation | movement of an airbag apparatus. It is explanatory drawing which shows operation | movement of an airbag apparatus. It is explanatory drawing which shows operation | movement of an airbag apparatus. It is explanatory drawing which shows operation | movement of an airbag apparatus. It is a perspective view which shows the modification of an airbag apparatus. It is explanatory drawing which shows the other modification of an airbag apparatus. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on a modification same as the above. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on a modification same as the above. It is a perspective view which shows an auxiliary | assistant wrap member. It is a perspective view which shows the modification incorporating an auxiliary | assistant wrap member. It is a figure which shows the modification which attached the outer bag and the airbag directly. It is a figure which shows the other modification which attached the outer bag and the airbag directly. It is sectional drawing which shows the modification which assembled | attached the airbag apparatus to the lid panel. It is a perspective view which shows the state which covered the folded airbag in the modification same as the above with the outer bag. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on a modification same as the above. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on a modification same as the above. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on a modification same as the above. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on another modification. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on another modification. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on another modification. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on another modification. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on another modification. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on another modification. It is explanatory drawing which shows the sheet-like member which concerns on the modification which extended the outer bag. It is explanatory drawing which shows the airbag apparatus which concerns on a modification same as the above. It is explanatory drawing which shows the airbag apparatus which concerns on a modification same as the above. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on a modification same as the above. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on a modification same as the above. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on a modification same as the above. It is a schematic perspective view which shows the airbag apparatus which concerns on the modification which formed the auxiliary | assistant slit. It is explanatory drawing which shows the airbag apparatus which concerns on a modification same as the above. It is explanatory drawing which shows the manufacturing process of the outer bag which concerns on a modification same as the above. It is explanatory drawing which shows the manufacturing process of the outer bag which concerns on a modification same as the above. It is explanatory drawing which shows operation | movement of the outer bag which concerns on a modification same as the above. It is a schematic perspective view which shows the airbag apparatus which concerns on the modification which shifted the position of the fracture | rupture line. It is explanatory drawing which shows the manufacturing process of the outer bag which concerns on a modification same as the above. It is explanatory drawing which shows the manufacturing process of the outer bag which concerns on a modification same as the above. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on a modification same as the above. It is explanatory drawing which shows other operation | movement of the airbag apparatus which concerns on a modification same as the above. It is a schematic perspective view which shows the airbag apparatus which concerns on the other modification which shifted the position of the fracture | rupture line. It is explanatory drawing which shows the manufacturing process of the outer bag which concerns on a modification same as the above. It is explanatory drawing which shows the manufacturing process of the outer bag which concerns on a modification same as the above. It is a schematic perspective view which shows the airbag apparatus which concerns on the further another modification which shifted the position of the fracture | rupture line. It is explanatory drawing which shows the manufacturing process of the outer bag which concerns on a modification same as the above. It is explanatory drawing which shows the manufacturing process of the outer bag which concerns on a modification same as the above. It is explanatory drawing which shows the manufacturing process of the outer bag which concerns on a modification same as the above. It is explanatory drawing which shows the manufacturing process of the outer bag which concerns on a modification same as the above. It is explanatory drawing which shows the manufacturing process of the outer bag which concerns on a modification same as the above. It is explanatory drawing which shows the manufacturing process of the outer bag which concerns on a modification same as the above. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on a modification same as the above. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on a modification same as the above. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on a modification same as the above. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on a modification same as the above. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on a modification same as the above. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on a modification same as the above. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on a modification same as the above. It is explanatory drawing which shows operation | movement of the airbag apparatus which concerns on a modification same as the above.

  Hereinafter, the airbag apparatus according to the embodiment will be described. FIG. 1 is a cross-sectional view showing an overall configuration of an airbag apparatus 20 according to the present embodiment. In addition, in FIG. 1, the state which integrated the airbag apparatus 20 in the instrument panel 10 is shown. FIG. 1 shows a cross section in a plane along the longitudinal direction of the vehicle.

  The airbag device 20 is incorporated in the instrument panel 10 in front of the passenger seat of the vehicle, and inflates and deploys in front of the passenger seat occupant when the vehicle collides, etc., and receives the passenger seat occupant and absorbs the impact. It is configured.

  That is, the instrument panel 10 is disposed as an airbag built-in panel in front of the passenger seat of the vehicle. The instrument panel 10 has a lid 12 that can be split open. Here, the instrument panel 10 is formed of resin. Further, a groove-like tear line 13 is formed on the inner peripheral surface of the instrument panel 10 so as to surround the substantially rectangular region from three sides (here, the rear and both sides of the vehicle). A region surrounded by 13 is a lid 12. The airbag device 20 is incorporated inside the lid 12. When the airbag device 20 is operated, the instrument panel 10 is torn along the tear line 13 so that the lid 12 is opened and an opening is formed. The formation example of the tear line 13 is not limited to the above example. For example, tear lines may be formed in an H-shape or a radial shape on the instrument panel, and the instrument panel may be divided into a plurality of portions and split open. In short, the tear line only needs to be formed in such a manner that an opening for airbag deployment can be formed when the airbag device 20 is operated.

  A vehicle body side member 18 that is a member fixed to the body of the vehicle is disposed inside the instrument panel 10. Here, it is assumed that the vehicle body side member 18 is a member fixed to the body and disposed along the vehicle width direction in the instrument panel 10 (a so-called lean hose member). The instrument panel 10 is fixed to the vehicle body by a mounting structure including a well-known structure, and the main body side member is also fixed to the vehicle body. Therefore, the instrument panel 10 and the vehicle body side member 18 are fixed. The positional relationship is maintained. Therefore, by attaching the airbag device 20 to the vehicle body side member 18, the airbag device 20 is also disposed at a fixed position with respect to the instrument panel 10.

  The airbag device 20 is incorporated in the instrument panel 10 as described above. Here, that the airbag device 20 is incorporated into the instrument panel 10 includes a case where the airbag device 20 is disposed at a position where the airbag device 20 can be inflated and deployed from the instrument panel 10. It is not essential to be physically and mechanically fixed to the ment panel 10.

  The airbag device 20 includes an inflator 22, an airbag 30, and an outer bag 40.

  The inflator 22 includes an ignition device, a gas generating agent, and the like, and is disposed inside the lid 12. The inflator 22 is configured to receive an ignition command signal from an impact detection unit or the like installed in the vehicle itself and burn the gas generating agent by the ignition device, thereby generating gas. Here, the inflator 22 is formed in a short cylindrical shape, and a collar portion 24 is formed on the outer periphery thereof with a metal plate or the like. Here, the collar portion 24 is formed in a square shape. Further, a screw portion 25 is projected from one main surface of the collar portion 24, and the inflator 22, the airbag 30, the outer bag 40, and the like are attached using the screw portion 25.

  The airbag 30 is formed in a bag shape having a gas inlet with cloth or the like. The inflator 22 is attached to the airbag 30 at a position and posture where gas can be introduced into the airbag 30 through the gas inlet. In a normal state, the airbag 30 is folded and disposed inside the lid 12, here, between the lid 12 and the inflator 22. The folding configuration of the airbag 30 may be a configuration that is folded along a predetermined folding line or a configuration that is folded so as to be crumpled. But it is preferable that the airbag 30 is folded so that it may form a rectangular parallelepiped shape. When the vehicle is inflated and deployed at the time of a vehicle collision or the like, the airbag 30 is inflated so as to open the lid 12 and project outward from the instrument panel 10 by the gas introduced from the inflator 22 through the gas inlet. Then, it expands and expands in a bag shape toward the passenger seat passenger side, which is the vehicle interior side.

  FIG. 2 is a perspective view showing a state in which the folded airbag 30 is covered with the outer bag 40. As shown in FIGS. 1 and 2, the outer bag 40 is configured by sewing a foldable and joinable flexible sheet-like member 42 (cloth or resin sheet or the like). Joining is preferably performed by sewing, and here also will be described with an example of sewing, but this is not essential.

  The outer bag 40 is formed by sewing the sheet-like member 42 so that both end portions thereof are overlapped with each other and the both end portions of the sheet-like member 42 are sewn so as to close the both end openings of the tubular shape. It is formed in a bag shape. An inflator attachment hole 43 is formed in the sheet-like member 42, and the outer bag 40 is folded in a state where the inflator 22 is attached to the peripheral portion of the inflator attachment hole 43 as will be described in detail later. The airbag 30 is covered. Further, a break line 45 that is easy to break is formed at a position inside the lid 12 in the outer bag 40, and the airbag 30 can be inflated and deployed by breaking the break line 45.

  The outer bag 40 will be described more specifically.

  In assembling the outer bag 40, first, a sheet-like member 42 shown in FIG. 3 is prepared. The sheet-like member 42 is formed in a rectangular shape. An inflator mounting hole 43 is formed at one longitudinal end of the sheet-like member 42, and fixing holes 43 a (four in this case) are formed at the peripheral edge of the inflator mounting hole 43. In addition, an inflator fitting recess 44 having a partial shape of the inflator mounting hole 43 (here, a slightly smaller concave shape than a semicircle) is formed at the other longitudinal end of the sheet-like member 42, and the inflator is fitted. A fixing hole 44 a is formed at the peripheral edge of the recess 44. In addition, a break line 45 is formed along the width direction of the sheet-like member 42 in the middle in the longitudinal direction. The break line 45 is a line that can be broken by the inflating and deploying force of the airbag 30. Here, the cut line 45 has a structure in which straight cut portions are formed intermittently in a straight line. In addition, it is not essential that the break line 45 has the above-described configuration, and any configuration that can form an opening that allows the airbag 30 to be inflated and deployed by breakage may be used.

  FIG. 4 shows a stitching line 42a (indicated by a dotted line in FIG. 4) and a folding line 42b (indicated by a two-dot chain line in FIG. 4) of the sheet-like member 42, while folding the sheet-like member 42 at a folding line 42b. The outer bag 40 is formed by sewing at the stitching line 42a.

  That is, first, the other end side of the sheet-like member 42 is folded along an arbitrary straight line L1 (see FIG. 4) along its width direction. Here, the sheet-like member 42 is folded along a straight line L <b> 1 along the breaking line 45. The straight line L <b> 1 is also a line parallel to the straight line L <b> 2 (see FIG. 5) that crosses the center of the inflator mounting hole 43 in the width direction of the sheet-like member 42. Then, as shown in FIG. 5, the inflator fitting recess 44 is overlapped with the inflator mounting hole 43.

  Next, the sheet-like member 42 is folded back along a straight line L2 (see FIG. 5) parallel to the straight line L1. Here, one end of the sheet-like member 42 is folded back along a straight line L <b> 2 that crosses the center of the inflator attachment hole 43 in the width direction of the sheet-like member 42. As a result, as shown in FIG. 6, the sheet-like member 42 is folded into a cylindrical shape so that both end portions thereof are overlapped. That is, the other end portion of the sheet-like member 42 is overlapped with one end portion of the sheet-like member 42 constituting the bottom portion 40a of the outer bag 40 described later.

  The positions of the straight lines L1 and L2 that fold the sheet-like member 42 are not limited to the above example. In order to easily perform sewing described later, it is preferable that the straight lines L1 and L2 are formed on the opposing surfaces in a state where the outer bag 40 is formed in a rectangular parallelepiped shape. Note that one end of the sheet-like member 42 may be folded before the other end.

  Next, as shown in FIG. 7, the sheet-like member 42 is sewn along the stitching lines 42 a perpendicular to the straight lines L <b> 1 and L <b> 2 at both side portions that are the opening portions on both ends of the cylindrical shape. Then, the sheet-like member 42 is formed in a bag shape that can cover the folded airbag 30 as a whole. In addition, the outer bag 40 may be overlapped with a plurality of cloths or the like entirely or partially according to the need for strength or the like. In addition, there may be a supplemental stitching portion or the like that is not related to the formation of the bag. In addition, the height adjustment of the outer bag 40 (peripheral wall part 40b) can also be easily performed by adjusting the shape of the sheet-like member 42, a folding line, etc. suitably.

  Here, the airbag 30 is accommodated in the outer bag 40 as follows.

  That is, as shown in FIG. 8, the sheet-like member 42 sewn as described above is turned over so that one end of the sheet-like member 42 faces the back side. And as shown in FIG. 9, the one end part of the sheet-like member 42 is pulled out so that the whole inflator attachment hole 43 may be exposed to the surface. A part of the inflator 22 is disposed in the inflator mounting hole 43 in a state in which the screw portion 25 protruding from the flange portion 24 of the inflator 22 is inserted into the fixing hole 43 a at the peripheral edge of the inflator mounting hole 43 of the outer bag 40. Established. The screw portion 25 projecting from the flange portion 24 of the inflator 22 is inserted into a fixing hole formed in the peripheral portion of the gas introduction port of the airbag 30 and is attached (temporary) to the airbag 30. Fixed).

  Then, as shown in FIG. 10, the inflator 22 and the folded airbag 30 are arranged on one main surface side (the outer surface side in the state shown in FIG. 10) of the portion having the inflator mounting hole 43 in the sheet-like member 42. Arranged. 10 to 12, (a) is a view from the inflated and deployed direction of the folded airbag 30, (b) is a view from the side of the folded airbag 30, and (c) is The figure from the bottom part (inflator 22) side of the folded-up airbag 30 is shown.

  Next, as shown in FIG. 11, the sheet-like member 42 is inverted so that the other end of the sheet-like member 42 (the end on the inflator fitting recess 44 side) is placed on the folded airbag 30. Let

  Furthermore, as shown in FIG. 12, the other end of the sheet-like member 42 (the end on the inflator fitting recess 44 side) is pulled to one end of the sheet-like member 42 (the end on the inflator mounting hole 43 side). When the sheet-like member 42 is completely inverted so that the inflator fitting recess 44 is overlapped with the inflator attachment hole 43, the airbag 30 in which the outer bag 40 is folded is entirely covered.

  In this state, the screw portion 25 of the inflator 22 is also inserted into the fixing hole 44 a of the inflator fitting recess 44. For this reason, the other end portion of the sheet-like member 42 is fixed to the fixing portion between the peripheral portion of the inflator mounting hole 43 and the inflator 22.

  In this state, the outer bag 40 is formed in a substantially rectangular parallelepiped container shape. More specifically, the outer bag 40 has a bottom portion 40a which is a substantially rectangular portion (a portion where the inflator mounting hole 43 is formed) to which the inflator 22 is fixed, and one main surface side of the bottom portion 40a is formed in a substantially rectangular ring shape. It has the surrounding wall part 40b which surrounds, and the ceiling part 40c which block | closes the opening of the said surrounding wall part 40b in the position facing the said bottom part 40a. When the sheet-like member 42 is folded into a substantially square shape, cone-shaped bag-shaped portions remain on both side portions of the bottom portion 40a and both side portions of the ceiling portion 40c. The bag-like portion is formed in the ear portion 40d by being folded into a triangular shape. The ear portion 40d may be folded outside the peripheral wall portion 40b, or may be folded between the peripheral wall portion 40b and the folded airbag 30. Thereby, the outer bag 40 is folded so that it may form a rectangular parallelepiped box shape.

  Further, the extending direction of the stitching line 42a, which is a joint portion on both sides of the sheet-like member 42, is a direction along the main inflating and deploying direction of the airbag 30 (that is, the direction toward the lid 12). The break line 45 is formed at a position facing the inflator attachment hole 43 (that is, the inflator 22). More specifically, the break line 45 is formed in the ceiling portion 40c between the end points of the stitching line 42a reaching the lid 12 side. Therefore, when the outer bag 40 is broken at the breaking line 45, the outer bag 40 has a portion where the breaking line 45 is broken as an opening, and a portion surrounded by the pair of stitching lines 42a in the sheet-like member 42. It is formed in the cylindrical shape used as a surrounding surface.

  Finally, the fixing bracket 28 is overlapped with the collar portion 24 of the inflator 22 from the outside of the outer bag 40. A hole corresponding to the screw portion 25 is formed in the fixing bracket 28, and a nut 29 is screwed and fastened to the screw portion 25 protruding from the hole. Thereby, between the collar part 24 and the fixing bracket 28, the peripheral part of the gas introduction port of the airbag 30 and the peripheral part of the inflator mounting hole 43 and the inflator fitting recessed part 44 of the outer bag 40 are sandwiched and fixed. The

  An inflator fixing member 46 is fixed to the inflator 22. The inflator fixing member 46 is a member formed of a metal plate or the like, and is here formed in a shape that bends in a substantially L shape. Here, the nut 29 is screwed and fastened to the screw portion 25 in a state where the screw portion 25 is inserted into the one end portion of the inflator fixing member 46, so that one end portion of the inflator fixing member 46 is connected to the fixing bracket 28. The inflator fixing member 46 is fixed to the inflator 22 by tightening and fixing between the outer surface of the nut and the nut 29. The other end of the inflator fixing member 46 is formed in a shape that can be fixed to the vehicle body side member 18. Here, the fixing bolt 18 </ b> B protruding from the vehicle body side member 18 is connected to the inflator fixing member 46. The inflator fixing member 46 is fixed to the vehicle body side member 18 by inserting the other end portion and screwing and fastening the nut 18N to the fixing bolt 18B. The inflator 22 is fixed at a fixed position inside the lid 12 by fixing the inflator fixing member 46 to the vehicle body side member 18.

  In this fixed state, the distance between the peripheral wall portion 40b of the outer bag 40 and the lid 12 is such that when the outer bag 40 is deployed in a cylindrical shape, the ceiling portion 40c and the ear portions 40d on both sides thereof are located more than the peripheral wall portion 40b. The length is preferably smaller than the length of extension (see FIG. 16).

  The fixing of the inflator fixing member 46 to the inflator 22 or the vehicle body side member 18 is not limited to the above example, and caulking, welding, a fitting structure, or a composite configuration thereof may be used.

  14-16 is explanatory drawing which shows the expansion | deployment operation | movement of the said airbag apparatus 20, FIG. 17 is explanatory drawing which shows the state of the outer bag 40 in the expansion | deployment state of the airbag 30. As shown in FIG.

  First, in a state before the deployment operation, as shown in FIG. 14, the folded airbag 30 is disposed inside the lid 12. Moreover, the peripheral wall part 40b of the outer bag 40 covers the folded airbag 30 from four sides, and the ceiling part 40c covers the upper part of the folded airbag 30.

  In this state, when the gas generated from the inflator 22 is introduced into the airbag 30, the airbag 30 starts to expand inside the lid 12, as shown in FIG.

  Then, the breaking line 45 of the outer bag 40 is broken by the force that the airbag 30 tries to inflate and deploy. As a result, the outer bag 40 can be deployed in a cylindrical shape with the breaking line 45 as an opening, and the airbag 30 attempts to inflate and deploy outward through the opening.

  At this time, in the main inflating and deploying direction of the airbag 30 (the direction from the inflator 22 toward the lid 12), the inflator 22 is fixed at a position away from the lid 12 by the inflator fixing member 46. For this reason, the airbag 30 that has started to inflate comes into contact with the inner surface of the lid 12, and the inflating and deploying force in the protruding direction of the airbag 30 acts as a force that divides the tear line 13 of the lid 12. Thereby, the lid 12 is split open and an opening is formed in the instrument panel 10.

  When an opening is formed in the instrument panel 10, the airbag 30 attempts to inflate and deploy outwardly from the instrument panel 10 through the opening. At this time, the ceiling portion 40c of the outer bag 40 and the ear portions 40d on both sides of the ceiling portion 40c can surround the airbag 30 on the inflating and deploying direction side of the airbag 30 relative to the peripheral wall portion 40b (FIG. 17). reference). That is, as the airbag 30 is inflated and deployed, the ceiling portion 40 c and the ear portions 40 d on both sides of the ceiling portion 40 c of the outer bag 40 are pushed outward through the opening of the instrument panel 10. When the airbag 30 protrudes outward through the opening of the instrument panel 10, the ceiling portion 40 c and the ear portions 40 d on both sides of the ceiling portion 40 c of the outer bag 40 are inflated with the opening of the instrument panel 10. It is sandwiched between the airbag 30 being deployed. Thereby, during the inflation and deployment of the airbag 30, the state in which the outer bag 40 surrounds the periphery of the airbag 30 inside the instrument panel 10 is more reliably maintained. And the part which exists inside the instrument panel 10 among the outer bags 40 receives the part located inside the instrument panel 10 among the airbags 30 inflated and deployed, and the airbag 30 Is prevented from spreading in the radial direction inside the instrument panel 10.

  The airbag 30 is inflated and deployed between the instrument panel 10 and the passenger seat occupant, thereby receiving the passenger occupant and absorbing the impact.

  According to the airbag device 20 configured as described above, the sheet-like member 42 is formed in a cylindrical shape so that both ends thereof are overlapped, and the sheet-like member 42 is closed so as to close both cylindrical opening portions. The outer bag 40 which covers the folded airbag 30 as a whole is formed by sewing both sides of the bag. For this reason, the structure which covers the airbag 30 folded by the sheet-like member 42 entirely by the comparatively simple joining operation | work of joining the both sides of the sheet-like member 42 can be obtained.

  In particular, in this embodiment, since the outer bag 40 can be obtained by the operation of stitching both sides of the sheet-like member 42 linearly, the outer bag 40 can be manufactured more easily.

  Moreover, since the sheet-like member 42 is formed in a substantially rectangular shape, waste is hardly generated when the sheet-like member 42 is cut out from the large sheet-like member 42, and the yield can be increased.

  Further, the other end portion of the sheet-like member 42 is overlapped with the bottom portion 40 a of the sheet-like member 42, and the other end portion of the sheet-like member 42 is fixed to a fixed portion between the peripheral portion of the inflator mounting hole 43 and the inflator 22. Therefore, the overlapping state of both side portions of the sheet-like member 42 is maintained through the attachment structure of the inflator 22, and the state in which the outer bag 40 covers the folded airbag 30 is more reliably maintained. The However, it is not essential that the overlapping portion of the sheet-like member 42 is an attachment location of the inflator 22.

  The extending direction of the stitching line 42a on both sides of the sheet-like member 42 is a direction along the main inflation and deployment direction of the airbag 30 that opens and inflates the lid 12 and both sides of the sheet-like member 42. A break line 45 is formed between the terminal ends of the stitching line 42a reaching the lid 12 side. For this reason, when the airbag 30 is inflated and deployed, the opening portion of the outer bag 40 formed by being broken by the breaking line 45 can extend in the direction of inflation and deployment of the airbag 30. Thereby, it can suppress that an airbag spreads in the radial direction.

  In particular, in this embodiment, when the outer bag 40 breaks the break line 45 formed in the ceiling portion 40c and opens in a cylindrical shape, the ceiling portion 40c and the ear portions 40d on both sides thereof are instrumented from the peripheral wall portion 40b. It can extend toward the opening of the panel 10 and can be further disposed on the opening outer portion of the instrument panel 10. And between the opening peripheral part of the instrument panel 10, and the airbag 30 which inflate-deploys, the ceiling part 40c and the ear | edge part 40d of the both sides can be arrange | positioned. For this reason, the state which surrounds the circumference | surroundings of the airbag 30 which the outer bag 40 tends to inflate inside the lid 12 is maintained more reliably, the radial expansion | deployment of the airbag 30 is suppressed, and a passenger seat passenger side It can be surely inflated and deployed.

  Thereby, in order to suppress that the airbag 30 expand | swells in a radial direction, installing a metal housing etc. around the folded airbag 30 can be omitted. Weight reduction and cost reduction are possible. In addition, since it is not necessary to form a housing mounting shape on the instrument panel 10 side, the configuration can be simplified.

  However, such a metal housing may be provided. Even when a housing is provided, it is possible to use a thin one and a low one, so that the weight can be reduced. Further, the connecting operation between the housing and the lid is not necessary, and the assembling operation of the airbag device is facilitated.

  Further, there is an advantage that it is not necessary to provide a lid side peripheral wall portion inside the lid 12. The lid 12 may have a lid-side peripheral wall portion, and an example of that case will be described later.

  Moreover, since the outer bag 40 is suppressing that the airbag 30 expand | deploys in a radial direction also in the opening peripheral part of the instrument panel 10, it can suppress the crack in the opening peripheral part of the instrument panel 10. it can.

  The outer bag 40 also plays a role of suppressing direct contact between the opening peripheral edge of the instrument panel 10 and the airbag 30 when the airbag 30 is inflated and deployed.

  Moreover, since the outer bag 40 is folded so as to form a rectangular parallelepiped box shape, the folded airbag 30 and the outer bag 40 that wraps the airbag 30 can have a rectangular parallelepiped appearance. As a result, it is easy to stabilize the shapes of the folded airbag 30 and outer bag 40 and facilitate the storing operation.

  Further, since the break line 45 is formed at a position where the inflator 22 and the inflator mounting hole 43 are opposed to each other, the airbag 30 can be effectively inflated and deployed to the opposite side of the inflator 22.

  Moreover, since the airbag 30 folded in the outer bag 40 is wrapped while the outer bag 40 is reversed, the reversing work of the outer bag 40 and the work of wrapping the airbag 30 by the outer bag 40 are performed. There is an advantage that it can be done at the same time. However, it is not essential that the outer bag 40 is inverted.

  Further, since the inflator 22 is fixed to the vehicle body side member 18 via the inflator fixing member 46, the fixing structure between the inflator 22 and the instrument panel 10 can be simplified or omitted.

  In the above-described embodiment, it is not essential that the fracture line 45 and the inflator 22 and the inflator attachment hole 43 are in a positional relationship facing each other. For example, like the airbag device 20B according to the modified example shown in FIG. 18, the inflator mounting hole 43 is formed in a portion constituting one surface of the peripheral wall portion 40Bb corresponding to the peripheral wall portion 40b in the outer bag 40B corresponding to the outer bag 40. A corresponding inflator attachment hole 43B may be formed and the inflator 22 may be attached. Even in this case, it is preferable that the stitching line 42 a is formed along the main inflation and deployment direction of the airbag 30 so that the outer bag 40 </ b> B can control the inflation and deployment mode of the airbag 30.

  Further, as shown in FIG. 19, a lid-side peripheral wall portion 14 may be formed on the back surface side of the instrument panel 10 so as to surround the lid 12. In this case, when the airbag 30 is inflated and deployed, as shown in FIG. 20, the outer bag 40 is sandwiched between the lid-side circumferential wall portion 14 and the airbag 30 being inflated and deployed inside the lid-side circumferential wall portion 14. It is. Finally, as shown in FIG. 21, the airbag 30 projects greatly outward through the opening of the instrument panel 10.

  In this case, since the outer bag 40 is sandwiched between the lid-side peripheral wall portion 14 and the airbag 30 being inflated and deployed, the outer bag 40 is inflated and deployed inside the instrument panel 10. The surrounding state is more reliably maintained. For this reason, it can suppress more reliably that the airbag 30 expand | deploys in the radial direction inside the instrument panel 10. FIG.

  Even when the lid-side peripheral wall portion 14 is provided in this manner, the outer bag 40 prevents the airbag 30 from being deployed in the radial direction, so that the height of the lid-side peripheral wall portion 14 is reduced, or Can be reduced in weight by reducing its thickness.

  As shown in FIGS. 22 and 23, the airbag device 20 may include an auxiliary wrap member (wrapping cloth) 60 that covers the airbag 30 folded inside the outer bag 40. Here, the auxiliary wrap member 60 is formed in a rectangular shape, and inflator insertion recesses 62 that are recessed in an arc shape are formed at both ends thereof, and the screw portion 25 is inserted into the peripheral portion of the inflator insertion recess 62. A possible mounting hole 62a is formed. Further, a break line 64 that can be broken by the inflation and deployment of the airbag 30 is formed in the middle portion in the longitudinal direction. Here, the breaking line 64 has a configuration in which straight cutting lines are intermittently formed, similarly to the breaking line 45.

  The auxiliary wrap member 60 is mounted so as to cover the folded airbag 30, and both end portions thereof are pulled out to the inflator 22. The screw portion 25 of the inflator 22 is inserted into the attachment hole 62a, and the auxiliary wrap member 60 is attached and fixed to the inflator 22 using the attachment structure portion of the inflator 22, the airbag 30, and the outer bag 40. Yes.

  By this auxiliary wrap member 60, the airbag 30 is maintained in a more reliably folded form. In particular, before the folded airbag 30 is put into the outer bag 40, the auxiliary wrap member 60 is attached to keep the airbag 30 folded, and the folded airbag. By making it difficult for the inflator 22 to separate from the airbag 30, the airbag 30 can be easily put into the outer bag 40.

  The auxiliary wrap member 60 is not limited to the above shape. For example, the auxiliary wrap member 60 may be formed in a cross shape extending along four side portions from the ceiling portion of the folded airbag 30.

  In addition, as shown in FIGS. 24 and 25, the outer bag 40 may be directly attached to the airbag 30.

  In the example shown in FIGS. 24 and 25, the outer bag 40 is directly attached to the airbag 30 around the inflator attachment hole 43. More specifically, in the example shown in FIG. 24, the outer bag 40 is directly fixed to the airbag 30 via a circular stitching portion 70 as a circular joint portion surrounding the inflator mounting hole 43. . Moreover, in the example shown in FIG. 25, the outer bag 40 is attached to the airbag 30 via the square stitching | suture part 72 as a square junction part along four sides around the bottom part 40a.

  The stitching of the outer bag 40 to the airbag 30 may be performed either before or after the airbag 30 is sewn into a bag shape, or may be performed before or after the outer bag 40 is sewn into a bag shape.

  According to the modification shown in FIGS. 24 and 25, since the outer bag 40 is directly attached to the airbag 30, the airbag 30 (or the molding for the molding thereof) is in the middle of manufacturing before the inflator 22 is attached. The sheet-like member) and the outer bag 40 (or the sheet-like member for molding thereof) can be handled as an integral component, which is convenient in the work process.

  In particular, since the bottom 40a of the outer bag 40 is attached to the airbag 30, the outer bag 40 can be easily processed after the attachment. Further, since the airbag 30 is attached to the outer bag 40 around the inflator attachment hole 43, the airbag 30 can be stably inflated and deployed with the periphery of the inflator 22 as a fixed portion.

  In the example shown in FIG. 24, since the airbag 30 is directly fixed to the outer bag 40 via the circular stitching portion 70, the inflation and deployment force of the airbag 30 is applied to the circular stitching portion 70. When acting, the force is distributed in the extending direction with respect to the circular suture portion 70. For this reason, it becomes difficult for the outer bag 40 and the airbag 30 to come off.

  Moreover, in the example shown in FIG. 25, since the outer bag 40 and the airbag 30 are stitched | sutured via the square stitching part 72, the bottom part 40a of the outer bag 40 is easy to maintain a square shape. For this reason, it becomes easy for the outer bag 40 to maintain a rectangular parallelepiped box shape.

  Further, the airbag device 20 may be connected and fixed to a lid side peripheral wall portion standing on the outer periphery of the lid 12. In this case, as in the modification shown in FIG. 26, the lid panel 110 </ b> B assembled in the instrument panel 110 and the airbag device 120 corresponding to the airbag device 20 may be connected and fixed.

  That is, the instrument panel 110 includes an instrument panel main body 110A that is fixed to the vehicle body, and a lid panel 110B that is attached to the instrument panel main body 110A. An opening (here, a substantially rectangular opening) is formed in the instrument panel body 110A, and the lid panel 110B is fitted and fixed in the opening. The lid panel 110B is fixed by, for example, engaging an engaging portion 110Ba formed on the lid panel 110B with an engaged portion (not shown) formed on the instrument panel main body 110A.

  The lid panel 110B is formed of resin or the like, and is used as an airbag built-in panel in which the airbag device 120 is incorporated. A lid 112 similar to the lid 12 is formed on the lid panel 110B. A tear line 13 is formed around the lid 112.

  On the inner surface of the lid panel 110 </ b> B, a lid-side peripheral wall portion 114 that is erected around the outer periphery of the lid 112 is formed. The lid side peripheral wall portion 114 surrounds the lid 112 over the entire outer periphery. However, the lid-side peripheral wall portion 114 is inclined with respect to the main surface of the lid panel 110B, and extends so as to face substantially downward when the lid panel 110B is attached to the instrument panel main body 110A. In this state, the lower end of one side wall 114A (left side in FIG. 26) located on the front side of the lid-side peripheral wall 114 is the other side wall 114B (on FIG. 26) located on the rear side of the vehicle. It is located above the lower end of (right side). Further, mounting holes 114Ah and 114Bh for connecting belts 170 and 172, which will be described later, are formed in the side wall portions 114A and 114B.

  The airbag device 120 includes an inflator 22, an airbag 30, and an outer bag 40, and further includes belts 170 and 172.

  FIG. 27 is a perspective view showing the outer bag 40 and the belts 170 and 172 in the middle of assembly. As shown in FIGS. 26 and 27, the belts 170 and 172 are members that are connected to the inflator 22 and the lid-side peripheral wall 114 and hold the inflator 22 at a fixed position inside the lid 112. Here, one end portions of the belts 170 and 172 are joined to the inflator 22, and the other end portions of the belts 170 and 172 are joined to the peripheral wall portion 40b through attachment holes 114Ah and 114Bh formed in the lid-side peripheral wall portion 114. An example will be described.

  That is, a pair of belts 170 are joined to one side surface portion of the peripheral wall portion 40b of the outer bag 40, and a pair of other side surface portions facing the one side surface portion of the peripheral wall portion 40b of the outer bag 40 are paired. The belt 172 is joined.

  The pair of belts 170 are integrated at the base end portion, separated at a middle portion in the longitudinal direction through a hole (in this case, a shape gradually narrowing from the base end side toward the tip end side), and cut at the tip end portion. It is set as the structure isolate | separated by etc. Further, the tip portions of the pair of belts 170 have an arcuate concave edge corresponding to the outer peripheral shape of the inflator 22, and are formed around the gas inlet of the airbag 30 on the outer periphery of the concave edge. Mounting holes are formed at locations corresponding to the mounting holes. The base end portions of the pair of belts 170 are joined to the outer surface of one side surface portion of the peripheral wall portion 40b by sewing or the like, and in a state before attachment to the lid side peripheral wall portion 114 (see FIG. 27), the peripheral wall portion 40b. It extends upward from one side surface portion.

  The pair of belts 172 has substantially the same configuration as the pair of belts 170 except that the length dimension is different from that of the pair of belts 170. The base end portions of the pair of belts 172 are joined to the outer surface of the other side surface portion of the peripheral wall portion 40b by sewing or the like, and in a state before attachment to the lid side peripheral wall portion 114 (see FIG. 26), It extends upward from the other side portion.

  A configuration for attaching the integrated structure of the inflator 22, the airbag 30, and the outer bag 40 to the lid panel 110B will be described.

  First, the folded airbag 30 and the outer bag that wraps the pair of belts 170 and the pair of belts 172 are passed through the attachment holes 114Ah and 114Bh of the side wall portions 114A and 114B of the lid side peripheral wall portion 114 from the inside. 40 is pushed into the lid side peripheral wall 114.

  Thereafter, the pair of belts 170 and the pair of belts 172 are folded back from the outer surface of the lid-side peripheral wall 114 toward the periphery of the inflator 22. Then, the screw portion 25 of the inflator 22 is passed through the attachment holes on the distal end side of the pair of belts 170 and the pair of belts 172. Then, the nut 29 is screwed and fastened to the screw portion 25 in a state where the fixing bracket 28 is superimposed on the flange portion 24 of the inflator 22. Until this state is reached, the nut 29 may be loosely fastened to the threaded portion 25, and the nut 29 may be removed as necessary. As a result, the inflator 22 is held at a position away from the lid 112 by a certain distance.

  As described above, when the lid panel 110B to which the inflator 22, the airbag 30, and the outer bag 40 are attached is fitted into the opening of the instrument panel main body 110A from the outside, the airbag device 120 is installed in the instrument panel body 110A. It will be incorporated into the ment panel 110. At this time, since the rigid fixing structure between the airbag device 120 and the vehicle body side member 18 is not necessary, the airbag device 120 can be assembled relatively easily.

  28-30 is explanatory drawing which shows the expansion | deployment operation | movement of the said airbag apparatus 120. FIG. In these drawings, for convenience of explanation, the side wall 114A and the side wall 114B of the lid side peripheral wall 114 are simplified, for example, at substantially the same height.

  First, in the normal state before the deployment operation, the folded airbag 30 is disposed between the lid 112 and the inflator 22 as shown in FIG. In this state, the lid-side peripheral wall portion 114 surrounds the upper end portion of the folded airbag 30 from four sides. Moreover, the peripheral wall part 40b of the outer bag 40 surrounds the folded airbag 30 from four surroundings.

  When the gas from the inflator 22 is introduced into the airbag 30 in this state, the airbag 30 is in a space surrounded by the lid 112, the lid side peripheral wall portion 114, and the inflator 22, as shown in FIG. Start expansion.

  At this time, in the main inflation and deployment direction of the airbag 30 (the direction from the inflator 22 toward the lid 112), the inflator 22 is held at a certain distance from the lid 112 by the belts 170 and 172. The expansion and deployment force in the protruding direction of the bag 30 acts as a force for the lid 112 to open.

  At this time, as in the case of the above-described embodiment, the airbag 30 tends to be inflated and deployed also in the radial direction toward the periphery with the main inflation and deployment direction (direction from the inflator 22 toward the lid 112) as the center. In the portion where the lid-side peripheral wall portion 114 is present, the airbag 30 to be inflated and deployed is pressed against the inner surface of the lid-side peripheral wall portion 114, so that the air bag 30 and the lid-side peripheral wall portion 114 are It is hold | maintained so that the surrounding wall part 40b may be pinched | interposed. Further, a portion of the peripheral wall portion 40b interposed between the lid-side peripheral wall portion 114 and the inflator 22 receives the entire vicinity of the inflator 22 in the airbag 30 to be inflated and deployed. The airbag 30 can be prevented from inflating and deploying outward so as to spread in the radial direction between the lid-side peripheral wall portion 114 and the inflator 22.

  When the lid 112 is split open, the airbag 30 is inflated and deployed outward through the opening of the instrument panel 110 as shown in FIG. Even in this state, the peripheral wall portion 40b is partially overlapped with the lid-side peripheral wall portion 114 by the configuration sandwiched between the peripheral wall portion 40b airbag 30 and the lid-side peripheral wall portion 114. Thus, as described above, the portion of the peripheral wall portion 40b that is interposed between the lid-side peripheral wall portion 114 and the inflator 22 receives the entire vicinity of the inflator 22 in the airbag 30 that is inflated and deployed. Thus, the airbag 30 is prevented from spreading in the radial direction between the lid-side peripheral wall 114 and the inflator 22.

  The airbag 30 is inflated and deployed between the instrument panel 110 and the passenger seat occupant to receive the passenger occupant and absorb the impact.

  According to the airbag device 120 configured as described above, the airbag 30 is prevented from spreading in the radial direction between the lid-side peripheral wall portion 114 and the inflator 22 as much as possible, as in the above embodiment. The effect that it can be reduced in weight can be acquired.

  In addition, since the inflator 22 is held at a fixed position inside the lid 112 mainly by the belts 170 and 172, the holding configuration of the inflator 22 can be further reduced in weight.

  In addition, since the base end portions of the belts 170 and 172 are joined to the peripheral wall portion 40b through the mounting holes 114Ah and 114Bh, the peripheral wall portion 40b is located between the airbag 30 and the lid-side peripheral wall portion 114 during inflation and deployment. It becomes difficult to pull out from. Thereby, the surrounding wall part 40b is more reliably maintained between the lid side surrounding wall part 114 and the inflator 22, and the spread of the airbag 30 in the radial direction at the intermediate part can be more reliably suppressed.

  Further, since the inflator 22 is fixed at a fixed position inside the lid 112 by the belts 170 and 172, the fixing structure between the inflator 22 and the vehicle body side member can be simplified or omitted. Thereby, for example, since the lid panel 110B to which the inflator 22, the airbag 30 and the like are attached may be attached to the instrument panel main body 110A, the assembly work of the airbag device 120 to the instrument panel 110 is easy. It becomes.

  The main function of the belts 170 and 172 itself is to keep the position of the inflator 22 relative to the lid 112 constant. For this reason, the belts 170 and 172 do not exist continuously around the entire outer periphery of the airbag 30, but intermittently around at least two locations (here, four locations around the airbag 30). ).

  Moreover, the structure which connects a belt to a lid side surrounding wall part is not restricted to the said example.

  For example, as shown in FIG. 31, the longitudinal intermediate portions of the belts 270 and 272 are passed through the mounting holes 114Ah and 114Bh formed in the side wall portions 114A and 114B of the lid side peripheral wall portion 114, and both end portions of the belts 270 and 272 May be configured to be joined to the inflator 22.

  Also in this case, as shown in FIGS. 32 and 33, the belts 270 and 272 hold the inflator 22 at a fixed position from the lid 112 when the airbag 30 is inflated and deployed, as in the above case. Therefore, as in the case described above, there is an effect that the weight of the airbag 30 can be reduced as much as possible while suppressing the airbag 30 from spreading in the radial direction between the lid-side peripheral wall 114 and the inflator 22. be able to.

  Further, since both end portions of the belts 270 and 272 may be joined to the inflator 22, the work of joining the outer bag by stitching or the like becomes unnecessary, and the joining structure can be simplified.

  Further, for example, as shown in FIG. 34, the base end portions of the belts 370 and 372 are joined to the inflator 22, and the other end portions of the belts 370 and 372 are formed on the side wall portions 114A and 114B via the hooks 374. The fixing holes 114Ah and 114Bh may be locked and fixed. As the hook 374, for example, a member obtained by bending a metal plate material into a substantially U shape can be used. As a joining structure between the other end portions of the belts 370 and 372 and the hook 374, a sandwiching structure by sewing, caulking, or the like A configuration using other clip members or the like can be employed. Here, the hook 374 is locked to the mounting holes 114Ah and 114Bh from the outer surfaces of the side wall portions 114A and 114B.

  Even in this modification, as shown in FIGS. 35 and 36, the belts 370 and 372 hold the inflator 22 from the lid 112 at a fixed position when the airbag 30 is inflated and deployed, as in the above case. Therefore, as in the case described above, there is an effect that the weight of the airbag 30 can be reduced as much as possible while suppressing the airbag 30 from spreading in the radial direction between the lid-side peripheral wall 114 and the inflator 22. be able to.

  Further, the hooks 374 at both ends of the belts 370 and 372 can be relatively easily locked and joined so as to be hooked on the inflator 22 in the mounting holes 114Ah and 114Bh formed in the side walls 114A and 114B.

  Further, for example, if a belt length adjusting mechanism is incorporated in the belts 370 and 372, the hooks 374 can be easily hooked in the mounting holes 114Ah and 114Bh while the belts 370 and 372 are relatively long. If the lengths of the belts 370 and 372 are shortened, the inflator 22 can be held at a fixed position.

  Further, when the airbag 30 is inflated, the airbag 30 and the lid side peripheral wall portion 114 are inflated outward, so that the belts 370 and 372 are inflated so as to be bent outward, so that the mounting holes 114Ah and 114Bh are removed. The base end portion of the hook 374 locked from the side is displaced outward, and the tip end portion of the hook 374 strongly bites into the inner surface of the lid side peripheral wall portion 114 at the peripheral edge portions of the mounting holes 114Ah and 114Bh. This more reliably prevents the hook 374 from falling off.

  In the modification shown in FIG. 37, the sheet-like member 242 corresponding to the sheet-like member 42 is folded in a rectangular parallelepiped box shape, and the portion surrounding the folded airbag 30 is elongated. doing. Thereby, the outer bag 240 corresponding to the outer bag 40 is formed in such a size that the breaking line 45 can be broken after the airbag 30 to be inflated and deployed splits the lid 12 (see FIGS. 40 to 42). . Specifically, the length dimensions M1 and M2 (see FIG. 37) of both portions of the sheet-like member 242 forming the outer bag 240 reaching the inflator 22 from both sides of the breaking line 45 are the inflator 22 and the outer bag 240. It is preferable that it is set to be larger than the distance N (see FIG. 38) between the attachment portion and the lid 12. More preferably, in a state where the sheet-like member 242 is folded in a rectangular parallelepiped box shape, the height-wise dimensions M3 and M4 of the portion surrounding the folded airbag 30 are set to be larger than the distance N. .

  In a state where the airbag 30 folded by the outer bag 240 is covered, a part of the outer bag 240 in the height direction remains. As shown in FIG. 38, the surplus portion may be left on the folded airbag 30 or may be left at the peripheral side portion. Further, as shown in FIG. 39, a surplus portion of the outer bag 240, that is, a ceiling portion including a portion where the breaking line 45 is formed may be folded on the folded airbag 30.

  The airbag device 220 configured as described above is inflated and deployed as follows.

  That is, in the state before the deployment operation, as shown in FIG. 38 or FIG. 39, the folded airbag 30 is disposed inside the lid 12. Moreover, the peripheral wall part 40b of the outer bag 240 covers the folded airbag 30 from the surrounding four sides, and the ceiling part 40c covers the upper part of the folded airbag 30.

  In this state, when the gas generated from the inflator 22 is introduced into the airbag 30, the airbag 30 starts to expand inside the lid 12 and within the outer bag 240 as shown in FIG.

  At this time, in the main inflating and deploying direction of the airbag 30 (the direction from the inflator 22 toward the lid 12), the inflator 22 is fixed at a position away from the lid 12 by the inflator fixing member 46. For this reason, the airbag 30 that has started to inflate comes into contact with the inner surface of the lid 12 via the outer bag 240, and the inflating and deploying force in the protruding direction of the airbag 30 acts as a force for dividing the tear line 13 of the lid 12. . Thereby, as shown in FIG. 41, the lid 12 is split open, and an opening is formed in the instrument panel 10.

  When the airbag 30 is further inflated and deployed, the size of the airbag 30 becomes larger than the inner space of the outer bag 240. Then, the breaking line 45 of the outer bag 240 is broken by the force with which the airbag 30 is further inflated and deployed. As a result, the outer bag 240 can be deployed in a cylindrical shape with the breaking line 45 as an opening, and the airbag 30 tends to be inflated and deployed further outward through the opening.

  Then, as shown in FIG. 42, the airbag 30 is greatly inflated and deployed outward of the instrument panel 10 through the opening of the instrument panel 10 and the opening of the outer bag 240. At this time, the ceiling portion 40c of the outer bag 240 and the ear portions 40d on both sides of the ceiling portion 40c can surround the airbag 30 on the inflated and deployed direction side of the airbag 30 relative to the peripheral wall portion 40b (FIG. 42). reference). That is, due to the inflation and deployment of the airbag 30, the ceiling portion 40 c and the ear portions 40 d on both sides of the ceiling portion 40 c of the outer bag 240 are pushed outward through the opening of the instrument panel 10. When the airbag 30 protrudes outward through the opening of the instrument panel 10, the ceiling portion 40 c and the ear portions 40 d on both sides of the ceiling portion 40 c of the outer bag 240 are inflated with the opening of the instrument panel 10. It is sandwiched between the airbag 30 being deployed. In particular, since the outer bag 240 is broken at the breaking line 45 after the lid 12 is split open, the ceiling portion 40c of the outer bag 240 and the ear portions 40d on both sides of the ceiling portion 40c are formed on the instrument panel 10. It is more reliably pushed outward through the opening. Thereby, during the inflation and deployment of the airbag 30, the state in which the outer bag 240 surrounds the periphery of the airbag 30 inside the instrument panel 10 is more reliably maintained. And the part which exists in the inner side of the instrument panel 10 among the outer bags 240 receives the part located inside the instrument panel 10 among the airbags 30 inflated and deployed, and the airbag 30 Is prevented from spreading in the radial direction inside the instrument panel 10.

  The airbag 30 is inflated and deployed between the instrument panel 10 and the passenger seat occupant, thereby receiving the passenger occupant and absorbing the impact.

  According to this modification, since the break line 45 of the outer bag 240 is broken after the lid 12 is split open, the outer bag 240 is being inflated with the peripheral edge of the opening formed by splitting the lid 12. Between the airbag 30 and the airbag 30. Further, the peripheral portion of the breaking line 45 in the outer bag 240 is more reliably pushed out of the opening and covers the periphery of the lid 12. Thereby, it can suppress more reliably that the airbag 30 spreads in the radial direction. Further, the friction between the airbag 30 and the outer bag 240 is great, and the amount of protrusion of the airbag 30 can be suppressed. Furthermore, in the initial deployment of the airbag 30, the airbag 30 is wrapped by the outer bag 240, and sudden expansion is suppressed so that the airbag 30 does not widen greatly. Therefore, the occupant is located near the instrument panel 10 or the like. It is effective as a posture countermeasure.

  In particular, the lengths M1 and M2 of both portions of the sheet-like member 242 forming the outer bag 240 reaching the inflator 22 from both sides of the fracture line 45 are determined by the attachment locations of the inflator 22 and the outer bag 240, the lid 12 and the like. Since the distance N is set to be greater than the distance N, the above state is more reliably realized.

  The airbag 30 that is inflated and deployed is configured such that the remaining portion of the outer bag 240 that covers the folded airbag 30 is folded on the folded airbag 30. The lid 12 is split while being unfolded so that the folded portion of 240 is pressed against the lid 12, and then the breaking line 45 is broken. For this reason, the outer bag 240 is reliably spread by the peripheral edge of the opening formed by splitting the lid 12 and the outer periphery thereof, and is securely sandwiched between the peripheral edge of the opening and the airbag 30 that is inflated and deployed. . Thereby, it can suppress more reliably that the airbag 30 expand | deploys in the radial direction.

  43 and 44, the airbag device 320 according to the modified example splits the lid 12 into a portion 340B of the outer bag 340 that can extend beyond the opening formed by splitting the lid 12. Auxiliary slits 345A are formed along the direction intersecting the edge of the opening formed.

  45 shows a sheet-like member 342 for forming the outer bag 340, and FIG. 46 shows a state in the middle of forming the outer bag 340 using the sheet-like member 342.

  The difference between the sheet-like member 342 and the sheet-like member 42 is that an auxiliary slit 345 </ b> A that intersects (in this case, orthogonal) the break line 45 is formed in the middle of the break line 45. Here, in a state where the sheet-like member 342 is folded in a rectangular parallelepiped box shape, auxiliary slits 345A are formed in a direction along the side of the ceiling portion. The auxiliary slit 345A may be a line that has been cut in advance along the entire longitudinal direction thereof, or may be a line that is partially cut into a perforation and is broken back and forth when the breaking line 45 breaks. Also good.

  The auxiliary slit 345 </ b> A reaches the opening from the whole of the extended portion 340 </ b> B, in other words, the breaking line 45 in a state where the outer bag 340 extends beyond the opening formed by splitting the lid 12. Although it is preferable to form in the whole part, it is not necessarily required. It may be formed only in the vicinity of the breaking line 45. Moreover, you may form in the part which does not exceed the opening formed by splitting the lid 12 among the outer bags 340.

  According to the airbag device 320, the portion exceeding the opening formed by splitting the lid 12 as shown in FIG. 340B is cracked by the auxiliary slit 345A and covers the surrounding four sides of the opening. Accordingly, the portion 340B of the outer bag 340 is surely spread by the outer periphery of the opening formed by splitting the lid 12, and is securely sandwiched between the opening peripheral edge and the airbag 30 that is inflated and deployed. Thereby, the state in which the outer bag 340 surrounds the airbag 30 being inflated and deployed can be more reliably maintained, and the airbag 30 can be more reliably suppressed from deploying in the radial direction.

  In the above example, the auxiliary slit 345A is formed at a position that intersects the corner portion of the opening formed by splitting the lid 12, but for other positions, for example, the straight portion of the opening. And may be formed at a crossing position. Further, at least one auxiliary slit 345A may be formed.

  In the airbag device 420 according to the modification shown in FIGS. 48 to 50, the length P <b> 1 reaching the inflator 22 from one side of the breaking line 445 in the outer bag 440 is the other side of the breaking line 45 in the outer bag 440. It is set to be larger than the length P2 reaching the inflator 22 from one side.

  Here, as shown in FIG. 49, of the sheet-like member 442 for forming the outer bag 440, the sheet-like member 242 is folded in a rectangular parallelepiped box shape along the long side on one side of the ceiling surface. The broken line 445 is formed at the position. The break line 445 is a line that can be broken by the inflating and deploying force of the airbag 30 in the same manner as the break line 45, and here, a straight cut portion is intermittently formed in a straight line. .

  Further, here, auxiliary break lines 445B directed to one side of the break line 445 are formed on both sides of the break line 445. Here, the auxiliary breaking line 445B is formed along one fold portion forming the ear portion 40d in a state where the outer bag 440 is folded in a rectangular parallelepiped box shape. The auxiliary breaking line 445B breaks together when the airbag 30 breaks the outer bag 440 along the breaking line 445, and thus has a role of greatly expanding the opening for expanding and deploying the airbag 30 relative to the outer bag 440. End. Further, the auxiliary breaking line 445B is formed so as to cross the opening in the extended portion in a state where the outer bag 440 extends beyond the opening formed by splitting the lid 12. It also plays the same role as the auxiliary slit 345A. The auxiliary breaking line 445B may be a portion where a linear cut portion is continuously formed, or may be a portion formed intermittently.

  According to this modification, as shown in FIGS. 51 and 52, it plays the role of controlling the inflating and deploying direction of the airbag 30.

  That is, when the airbag device 420 is assembled into the instrument panel 10, the fracture line 445 is positioned on the upper side as shown in FIG. Then, since the airbag 30 is inflated and deployed through the breaking line 445 on the upper side, the airbag 30 is easily inflated and deployed in an obliquely upward direction.

  On the contrary, when the airbag device 420 is assembled into the instrument panel 10, as shown in FIG. 52, the fracture line 445 is positioned on the lower side. Then, since the airbag 30 is inflated and deployed through the fracture line 445 on the lower side, the airbag 30 is easily inflated and deployed in an obliquely downward direction.

  Therefore, the airbag 30 can be controlled to be inflated and deployed in an appropriate direction according to the shape, size, installation position of the instrument panel 10, the position of the occupant with respect to these, and the like. For example, by inflating and deploying in the direction of escaping from the occupant, it can be used as a measure against the occupant's irregular posture. Note that the timing at which the lid 12 is split open may be any time before or after the fracture of the fracture line 445.

  Further, the auxiliary break line 445B allows the outer bag 440 to be opened larger, and the airbag 30 can be smoothly inflated and deployed outward from the opening of the outer bag 440. However, the auxiliary break line 445B may be omitted.

  In the airbag apparatus 520 according to the modification shown in FIGS. 53 to 55, another auxiliary fracture line 545C is further formed in the modification shown in FIGS.

  That is, an auxiliary breaking line 545C that faces the other side of the middle portion of the breaking line 445 is formed in a portion of the outer bag 540 that covers the folded airbag 30. More specifically, in the sheet-like member 542 forming the outer bag 540, an intermediate portion (here) of the break line 445 is formed in a portion surrounding the airbag 30 folded in a rectangular box shape. Then, an auxiliary fracture line 545C is formed so as to face the inflator 22 from the central portion. The auxiliary breaking line 545 </ b> C is formed to have such a length that the folded airbag 30 of the outer bag 540 reaches the middle of the processing peripheral portion. The auxiliary breaking line 545C may be a portion in which linear cut portions are continuously formed, or may be a portion formed intermittently.

  Here, as in the modified example shown in FIG. 37, a part surrounding the periphery of the folded airbag 30 is elongated in a state in which the sheet-like member 542 is folded in a rectangular parallelepiped box shape. doing.

  According to this modified example, in addition to the operational effects provided by the modified example shown in FIG. 37 and the modified examples shown in FIGS. 48 to 50, the outer bag 540 is provided by the auxiliary breaking line 545C when the airbag 30 is inflated and deployed. Can be opened larger. For this reason, there exists an effect that the airbag 30 can be inflated and deployed out of the outer bag 540 more smoothly.

  56, the length reaching the inflator 22 from one side of the breaking line 45 in the outer bag 640 is the inflator 22 from the other side of the breaking line 45 in the outer bag 640. It is set to be larger than the length to reach.

  In this modification, as shown in FIGS. 57 to 62, a tack portion 641 for shortening the length of the outer bag 640 is formed in a portion reaching the inflator 22 from the other side of the breaking line 45. .

  That is, as shown in FIGS. 57 and 58, the outer bag 640 is formed in a rectangular parallelepiped box shape as in the above embodiment.

  Then, as shown in FIGS. 59 and 80, the outer wall 640 is a peripheral wall portion that surrounds the folded airbag 30, and the other side portion of the breaking line 45 is partially pushed up and down. The tucked portion 641 is formed by folding the portion into two and sewing the two portions. Thereby, the part which reaches the inflator 22 from the other side of the fracture | rupture line 45 among the outer bags 640 can be shortened.

  As shown in FIGS. 61 and 62, by forming the tack portions 641 at two locations, the portion of the outer bag 640 that reaches the inflator 22 from the other side of the breaking line 45 can be made shorter.

  The tack portion 641 may be formed before the outer bag 640 is formed in a rectangular parallelepiped box shape.

  According to the airbag device 620, the inflating and deploying direction of the airbag 30 can be controlled as shown in FIGS.

  That is, when the airbag 30 is inflated from the initial state shown in FIGS. 63 and 67, as shown in FIGS. 64 and 68, the airbag 30 splits the lid 12 in a state wrapped with the outer bag 640, Inflate and deploy outward.

  At this time, if the tack portion 641 is formed in the upper portion in the assembled state of the outer bag 640, the outer bag 640 has an upper margin because the upper portion has a short dimension and the lower portion has a long length. Inflates toward. That is, the airbag 30 is inflated and deployed upward while being wrapped in the outer bag 640.

  Eventually, as shown in FIGS. 65 and 69, the airbag 30 breaks the breaking line 45 of the outer bag 640 and expands outward from the outer bag 640, and as shown in FIGS. 66 and 70, the instrument panel 10. And inflated between the passenger and the passenger.

  Thus, since the airbag 30 can be inflated and deployed while facing upward, the deployment direction of the airbag 30 can be controlled. For this reason, by forming the tack portion 641 at an appropriate position, the airbag 30 is inflated and deployed in an appropriate direction according to the shape, size, installation position of the instrument panel 10, the position of the occupant with respect to these, and the like. Can be controlled.

{Modification}
In the above-described embodiment, the example in which the airbag device is incorporated in the instrument panel for the passenger seat has been described, but the application target is not limited thereto. For example, the present invention can be applied to various airbags that are incorporated into some attachment panel such as a driver's seat, a side airbag, etc., and that are inflated by opening a lid.

  In addition, each structure demonstrated in the said embodiment and each modification can be suitably combined unless it mutually contradicts.

  As described above, the present invention has been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10,110 Instrument panel 12,112 Lid 13 Tier line 14,114 Lid side peripheral wall part 18 Car body side member 20,20B, 120,220,320,420,520,620 Airbag apparatus 22 Inflator 30 Airbag 40, 40B , 240, 340, 440, 540, 640 Outer bag 40a Bottom 40b, 40Bb Peripheral wall 40c Ceiling 42, 242, 342, 442, 542 Sheet-like member 42a Sewing line 43, 43B Inflator mounting hole 43a Fixing hole 45445 Breaking line 46 Inflator fixing member 60 Auxiliary wrap member 64 Break line 70 Circular stitching portion 72 Square stitching portion 110B Lid panel 114A, 114B Side wall portion 114Ah, 114Bh Mounting holes 170, 172, 270 272,370,372 belt 374 hooks 345A auxiliary slit 445B auxiliary breaking line 545C auxiliary breaking line 641 tuck

Claims (24)

An airbag device incorporated into an airbag assembly panel having a lid that can be split open,
An inflator capable of generating gas inside the lid;
An airbag that is folded into a state that can be disposed inside the lid and is inflatable and deployable in a bag shape by a gas introduced from the inflator;
The sheet-like member is formed by a sheet-like member in which an inflator mounting hole is formed, and the sheet-like member is formed in a cylindrical shape so that both ends thereof are overlapped, and the both-end opening portions of the cylindrical shape are closed. The airbag is folded with the inflator being attached to the peripheral portion of the inflator attachment hole, and an easily breakable break line is formed at a position inside the lid. An outer bag,
An airbag device comprising: The airbag device according to claim 1,
One end of the sheet-like member is a bottom having the inflator mounting hole,
The other end portion of the sheet-like member is overlapped with the bottom portion of the sheet-like member, and the other end portion of the sheet-like member is fixed to a fixed portion between the peripheral portion of the inflator mounting hole and the inflator. Bag device. The airbag device according to claim 1 or 2,
The extending direction of the joint portions on both side portions of the sheet-like member is a direction along the main inflating and deploying direction of the airbag that opens and inflates the lid, and the joint portions on both side portions of the sheet-like member. An airbag device in which the breaking line is formed between the terminal ends of the lid reaching the lid side. The airbag device according to any one of claims 1 to 3,
The outer bag is an airbag device that is folded so as to form a rectangular parallelepiped box. It is an airbag apparatus as described in any one of Claims 1-4, Comprising:
The airbag device, wherein the breaking line is formed at a position facing the inflator mounting hole. It is an airbag apparatus as described in any one of Claims 1-5, Comprising:
An airbag device in which a part of the outer bag is disposed so as to be sandwiched between the airbag being inflated and deployed and a lid side peripheral wall portion standing on the outer periphery of the lid. The airbag device according to any one of claims 1 to 6,
The outer bag is folded in a state where both side portions of the sheet-like member are joined and the inflator to which the airbag is attached is disposed at a peripheral portion of the inflator mounting hole. An airbag device that covers the folded airbag by being inverted so as to cover the airbag. It is an airbag apparatus as described in any one of Claims 1-7,
An inflator fixing member fixed to the inflator and fixable to the vehicle body side member;
An airbag device in which the inflator is fixed to a fixed position inside the lid by fixing the inflator fixing member to the vehicle body side member. It is an airbag apparatus as described in any one of Claims 1-8,
An airbag device further comprising an auxiliary wrap member that covers the airbag folded inside the outer bag and that can be broken when the airbag is inflated and deployed. It is an airbag apparatus as described in any one of Claims 1-9, Comprising:
An airbag device in which the outer bag is attached to the airbag. The airbag device according to claim 10,
An airbag device in which the outer bag is attached to the airbag around the inflator attachment hole. The airbag device according to claim 11,
The airbag apparatus with which the said outer bag is attached to the said airbag via the circular junction part surrounding the said inflator attachment hole. The airbag device according to claim 11,
The outer bag is folded to form a rectangular parallelepiped box,
The airbag apparatus with which the said outer bag is attached to the said airbag via the square-shaped joining part along four sides around the surface in which the said inflator attachment hole was formed among the said outer bags. The airbag device according to any one of claims 1 to 13,
An airbag device further comprising a belt that is connected to the inflator and a lid-side peripheral wall portion standing on the outer periphery of the lid and holds the inflator at a fixed position inside the lid. The airbag device according to claim 14,
An airbag device in which one end of the belt is joined to an inflator, and the other end of the belt is joined to the outer bag through an attachment hole formed in the lid side peripheral wall. The airbag device according to claim 14,
An airbag device in which a longitudinal intermediate portion of the belt is passed through an attachment hole formed in the lid side peripheral wall portion, and both end portions of the belt are joined to the inflator. The airbag device according to claim 14,
An airbag device in which one end portion of the belt is joined to the inflator, and the other end portion of the belt is locked and fixed to the lid side peripheral wall portion via a hook portion. The airbag device according to any one of claims 1 to 17,
The said outer bag is an airbag apparatus currently formed in the magnitude | size which can fracture | rupture the said fracture | rupture line, after the said airbag which expand | deploys and expands opens the said lid. The airbag device according to claim 18, wherein
The airbag device, wherein a length of both portions of the outer bag reaching the inflator from both sides of the breaking line is larger than a distance between the inflator and the lid. The airbag device according to claim 18 or 19, wherein
The airbag apparatus by which the part including the formation location of the said fracture | rupture line among the said outer bags is folded on the folded said airbag. The airbag device according to any one of claims 1 to 20,
An auxiliary slit along the direction intersecting the edge of the opening formed by splitting the lid is formed in a portion of the outer bag that can extend beyond the opening formed by splitting the lid. An air bag device is formed. The airbag device according to any one of claims 1 to 21,
The airbag device, wherein a length of the outer bag reaching the inflator from one side of the break line is larger than a length of the outer bag reaching the inflator from the other side of the break line. The airbag device according to claim 22,
The airbag apparatus by which the tack part which shortens the length dimension is formed in the part which reaches the said inflator from the other side of the said fracture | rupture line among the said outer bags. The airbag device according to claim 22 or claim 23,
The airbag apparatus in which the auxiliary | assistant breaking line which goes to the one side of the said breaking line from the said breaking line is formed.

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