JP6544265B2 - Air bag device - Google Patents

Description

  The present invention relates to an air bag apparatus equipped with an air bag which is mounted on a vehicle and in which inflation gas from a substantially columnar inflator is introduced to inflate.

  Conventionally, as an airbag for connecting a substantially cylindrical inflator, an airbag body and a flexible reinforcing sheet (reinforcement cloth) disposed in the airbag body are provided (for example, Patent Document 1). The air bag body is connected to the inflator such that the inflation gas from the inflator flows into the main body inflation portion, and the main body inflation portion inflates the inflation gas so as to inflate the front side wall portion and the back side wall portion apart. And a cylindrical connection port. The connection port portion is connected to the main body side cylindrical portion connected to be substantially orthogonal to the main body expansion portion side and to be substantially orthogonal to the main body side cylindrical portion, and the insertion side cylinder to be connected with the inflator by inserting the inflator. It was set as the structure mounted in a vehicle as the state bent in L shape which has a part and. The reinforcing sheet is disposed so as to cover the outer periphery of the inflator on the inner peripheral side of the connection port of the air bag main body in order to improve the heat resistance. Then, the conventional reinforcing sheet is folded in half into a sheet material made of plain weave or the like so that the inflation gas can be used as a main body so that it can be manufactured inexpensively as compared with the one with bag weave (see, for example, Patent Document 2) It is formed by sewing a predetermined peripheral edge so as to guide the expansion portion side.

JP, 2011-20518, A ([0041], Drawing 14, 18) JP, 2006-117109, A

  However, in the conventional air bag device, the reinforcing sheet folds the plain weave cloth material on the upper edge side of the insertion side tube portion in the connection port portion away from the main body expansion portion and folds it in two, A suture site was provided in the vicinity of the front edge side away from the inflator in the case of

  Then, the inflation gas from the inflator, which is supplied from the insertion-side tubular portion in the connection port portion to the main body expansion portion through the main-body-side tubular portion flows in the axial direction of the insertion-side tubular portion, and the main body of the connection port portion It flowed so that the front edge of the side cylinder part might be hit, and then it flowed to the main body expansion part side along the axial direction of the main body side cylinder part. However, in the conventional air bag, the sutured portion of the reinforcing sheet is to be disposed on the front edge side of the main body side cylindrical portion on which the inflation gas hits.

  Therefore, if the seamed portion of the reinforcing sheet hits the expansion gas at a higher temperature, there is a possibility that damage may occur, and there is a problem in improving the heat resistance of the reinforcing sheet.

  The present invention is intended to solve the above-mentioned problems, and it is an object of the present invention to provide an airbag device capable of easily improving the heat resistance of a reinforcing sheet disposed in the connection port of the airbag.

  The airbag apparatus according to the present invention is configured to include an airbag that inflates inflating gas and inflates, and a substantially cylindrical inflator that supplies the inflating gas discharged from the tip side to the airbag. . The air bag includes an air bag body and a flexible reinforcing sheet disposed on the inner peripheral side of the air bag body. The air bag main body is configured to allow the inflating gas to flow in and separate the front side wall portion and the back side wall portion from each other, and the inflating gas from the inflator to flow into the main body inflating portion. And a cylindrical connection port connected to the inflator. The reinforcing sheet is disposed on the inner circumferential side of the connection port so as to cover the outer circumferential side of the inflator.

  The reinforcing sheet includes a first cover portion and a second cover portion. The first cover portion is folded in half by providing a cross direction side fold in a direction crossing the axial direction of the inflator in a direction away from the tip end side of the inflator along the axial direction of the inflator. It is disposed on both sides of the direction-side fold and at both ends away from the cross-direction-side fold, the tip side of the inflator is wrapped. The second cover portion is provided with an axial fold along the axial direction of the inflator on the separation edge side away from the main body expansion portion, folded in half, and is disposed so as to wrap the distal end side of the inflator.

  The first cover portion and the second cover portion are disposed in an overlapping manner so as to connect the cross direction side fold and the axial direction side fold at a portion separated from the tip of the inflator. While being provided, the opening part which opens the said main body expansion part side of the said airbag main body is provided, and it arrange | positions.

  In the air bag device according to the present invention, the inflation gas discharged from the tip end side of the inflator in operation flows through the inside of the connection port of the air bag body to the body expansion side. At that time, the expansion gas flowing inside the reinforcing sheet flows from the connection port through the opening to the main expansion section side, but before flowing to the main expansion section, the cross direction side of the first cover section of the reinforcing sheet Hit the site of the fold. However, the fold portion is a fold portion in which the front side and the back side of the first cover portion are continuously formed, and the front side and the back side of the first cover portion Since it is not a portion formed by sewing with the side, heat resistance can be improved as compared to the conventional reinforcing sheet. In addition, the inflation gas discharged from the tip end side of the inflator hits the separation edge side away from the opening in the reinforcing sheet, and at that site, the axial side fold of the second cover portion is disposed, The portion of the fold is also a portion of the fold in which the front side and the back side of the second cover portion are continuously formed, and the front side and the back side of the second cover portion It is heat resistant because it is not a site formed by suturing and. And since a reinforcement sheet can be formed only by overlapping and arranging a 1st cover part and a 2nd cover part so that these cross direction side folds and an axial direction side fold may be in a row, heat resistance is possible. The reinforcing sheet having the can be easily manufactured.

  Therefore, in the airbag device according to the present invention, the heat resistance of the reinforcing sheet disposed at the connection port of the airbag can be easily improved.

  And in the airbag apparatus which concerns on this invention, it is desirable for the said 2nd cover part of the said reinforcement sheet to be arrange | positioned inside the said 1st cover part.

  In such a configuration, the second cover portion having the axial side fold is disposed on the inner side approaching the inflator, and the inflation gas discharged from the tip end side of the inflator is the second expansion portion of the reinforcing sheet. (I) The first cover is brought into contact with the axial side fold of the second cover approaching the inflator prior to the first cover from the axial side fold of the second cover within the connection port of the air bag body. It will be guided to the cross direction side fold part of a cover part, will flow to the main part expansion part side, and a reinforcement sheet can exhibit heat resistance more suitably in the upper stream side of gas for expansion.

  In this case, it is desirable that an edge side of the second cover portion which is apart from the tip of the inflator along the axial direction of the inflator is sewn to the first cover portion.

  In such a configuration, it is possible to prevent the edge side of the second cover portion away from the tip of the inflator along the axial direction of the inflator from being turned away from the first cover portion. Therefore, it is possible to prevent the inflation gas from entering the periphery of the second cover portion and the inner periphery of the first cover portion around the edge of the second cover portion. Therefore, for example, the inflation gas strikes the crosswise side fold portion of the first cover portion and bounces, and thereafter, the edge of the second cover portion also moves toward the axial side fold side of the second cover portion Since it is difficult to come in, it is difficult to enter the outer circumference side of the axial side fold, and even if there is a stitched part such as the first cover part on the outer peripheral side of the axial side fold of the second cover part It is possible to prevent damage by the inflation gas at the site.

  Further, in the airbag device according to the present invention, the first cover portion of the reinforcing sheet has an angle such that the crossing direction fold is expanded from the direction perpendicular to the axis of the inflator toward the opening. It is desirable to arrange them so as to be inclined.

  In such a configuration, the inflation gas discharged from the tip end side of the inflator is guided to the opening side by the inclination angle of the cross direction side fold after hitting the cross direction side fold site. Since it flows, the pressure rise near the cross direction side fold is suppressed, and the inflation gas near the cross direction side fold smoothly passes through the opening of the reinforcing sheet, and the main body inflation portion of the airbag main body It can flow to the side.

  Furthermore, in the air bag device according to the present invention, it is desirable that the first cover portion of the reinforcing sheet stitch together the separable edges away from the main body expansion portion continued from the cross direction side fold.

  In such a configuration, the first cover portion is disposed in the connection port portion because the separation edges separated from the openings of the front side portion and the back side portion of the first cover portion of the reinforcing sheet are sewn together. In this case, the front side portion and the back side portion of the first cover portion do not easily shift, and the first cover portion of the reinforcing sheet can be easily disposed at a predetermined position in the connection port portion.

  Further, in the airbag device according to the present invention, the second cover portion of the reinforcing sheet is separated from the axial fold and is continuous with the opening, and the opening for inserting the inflator of the connection port is inserted. It is desirable that the side edges be sewn together.

  In such a configuration, when the second cover portion of the reinforcing sheet is disposed in the connection port, the front side portion and the back side portion of the second cover portion do not easily shift, and the second cover portion of the reinforcing sheet is It can be easily disposed at a predetermined position in the unit.

  Further, in the airbag device according to the present invention, the first cover portion and the second cover portion are separated from the axial-side fold and connected to the opening portion, and the inflator of the connection port portion is It is desirable that the edges on the opening side to be inserted be stacked together and stitched together.

  In such a configuration, the first cover portion and the second cover portion, including the front side portion and the back side portion thereof, do not easily shift from each other, and the reinforcing sheet is fixed at a predetermined position in the connection port portion. It can be easily arranged.

  Furthermore, in the airbag apparatus according to the present invention, it is preferable that the first cover portion and the second cover portion be formed of a single reinforcing sheet material connected to each other.

  In such a configuration, since the first cover portion and the second cover portion are connected in advance, handling becomes easy, and an operation of connecting the first cover portion and the second cover portion is performed, It can be reduced.

  Furthermore, in the airbag device according to the present invention, the first cover portion may be configured to include a reinforcing portion having a plurality of layers in the vicinity of the cross direction side fold, or the second cover portion may be The reinforcing portion may have a plurality of layers in the vicinity of the axial side folds.

  In such a configuration, the first cover portion and the second cover portion can have a plurality of layers near the cross direction side fold or near the axial direction side fold by the reinforcing portion, and the reinforcement sheet can be further enhanced. Heat resistance can be improved.

  Further, in the air bag device according to the present invention, at least one of the first cover portion and the second cover portion, the side approaching the outer peripheral surface of the inflator is heat resistant to the inner side surface in contact with the inflator. It is desirable that the coating layer having the above be disposed.

  In such a configuration, the heat resistance of the reinforcing sheet can be improved.

  Furthermore, in the air bag device according to the present invention, heat resistance is provided to the surface where both the first cover portion and the second cover portion are exposed to the inflation gas while facing the outer peripheral surface side of the inflator. It is desirable that the coating layer having the above be disposed.

  With such a configuration, the heat resistance of the reinforcing sheet can be further improved.

  Then, as described above, if the side close to the outer peripheral surface of the inflator in the first cover portion and the second cover portion is configured by providing a heat-resistant coating layer, The side close to the outer peripheral surface of the inflator in the first cover portion and the second cover portion is the opening side of the connection port portion into which the inflator is inserted, so as to face the inflator in between. It is desirable to provide a tongue portion which is extended, and to attach the tip end of the two opposite tongue portions to the outer surface side of the connection port by folding it back to the outer surface side of the connection port.

  In such a configuration, the heat-resistant coating layer is generally made of a coating agent such as a silicone resin, so it is hard to slip and it is difficult to insert the inflator. However, if the end face side of the opening of the connection port is covered with the tongue part which is folded back from the inner peripheral surface side to the outer peripheral surface side, the tongue part is held to hold the inflator and the inner periphery of the reinforcing sheet of the connection port. It can be pushed to the side, and the insertion work to the connection port of the inflator can be easily performed. In addition, since the end face side of the reinforcing sheet and the connection opening of the air bag main body is covered by the tongue portion, the inflator is disposed between the outer peripheral surface side of the reinforcing sheet and the inner peripheral surface of the connection opening of the air bag main body. It is also possible to eliminate the incorrect assembly that inserts the.

  In the air bag device according to the present invention, the air bag is disposed in the connection opening portion of the air bag main body and the inside of the main body expansion portion in the vicinity of the connection opening portion, and the reinforcement is performed on the inner circumferential side. A connection cylindrical portion including a flexible flow straightening sheet on which the sheet is disposed, the flow straightening sheet being disposed in the connection port and having the distal end side of the inflator inserted therein for connection to the inflator And at least two streams that can extend out from the connecting tubular portion to the main body expanding portion side and allow the inflation gas from the inflator that has flowed in via the connecting tubular portion to branch out on both ends and flow out. And an outlet port having an outlet.

  In such a configuration, the straightening sheet whose heat resistance is improved by the reinforcing sheet causes the inflation gas for the inflator to flow to the outlet through the connecting cylinder and from the outlet on at least both sides of the outlet, It can be made to branch off smoothly to the main body expansion part side of an air bag main body, and to flow out.

  In this case, the flow straightening sheet is formed of a sheet of flexible sheet material, and is provided with a fold on the side of the outlet and folded in two, and the overlapping outer peripheral edges are sewn together It is desirable that it is formed.

  In such a configuration, the expansion gas flows through the opening of the reinforcing sheet to the outlet of the straightening sheet, and when it flows out from the outlets on both sides, it strikes the fold of the outlet. The portion is a fold portion in which the front side and the back side of the straightening sheet are continuously formed, and formed by stitching the front side and the back side of the straightening sheet The heat resistance is improved because it is not a site where Therefore, in the configuration as described above, a heat-resistant rectifying sheet can be easily formed.

  In this case, the straightening sheet may be provided with an intermediate outlet through which the expansion gas can flow out between the outlets on both sides of the outlet portion.

  As described above, if the straightening sheet is configured by providing the middle outlet in addition to the outlets on both sides at the outlet portion, the flow rate of the expansion gas to be discharged from each outlet of the straightening sheet Various settings can be made in accordance with the plurality of inflation portions provided in the bag body, and the performance of the airbag can be improved.

In the air bag device according to the present invention, the straightening sheet is provided with a bent portion which is bent in a substantially L shape from the outlet to the connecting cylindrical portion at the seamed portion between the stacked outer peripheral edges. Let it be configured
A flexible patch is disposed on the inner peripheral side of at least the vicinity of the bent portion in the flow straightening sheet,
The patch cloth is sewn along the bending portion to the portions on both sides of the fold line in the straightening sheet, in the vicinity of the bending portion separated from the stitching portion of the bending portion. Preferably, they are integrated with the flow straightening sheet, and are sewn together with the flow straightening sheet, with the edges overlapping each other at the stitching portion of the bending portion.

  In such a configuration, when the flow straightening sheet inflates the outlet port side from the connection cylindrical portion on the inner circumferential side of the airbag main body and on the outer circumferential side of the reinforcing sheet, a tensile force by the pressure of the inflation gas , Stress concentrates at the suture site near the bend. However, in the straightening sheet, the suture site at the bending portion is reinforced by suturing a patch. That is, the portions on both sides of the folded fold in the straightening sheet are reinforced so as to increase the thickness by stitching the patch cloth prior to the stitching portion of the bent portion. Therefore, the suture site in the vicinity of the bent portion of the straightening sheet is not easily damaged by the pressure of the expansion gas, and the expansion gas can smoothly flow out from the outlet without breakage.

  In this case, as long as the backing cloth is composed of one sheet connected on the inner circumferential side of the straightening sheet, it is sufficient to dispose one backing cloth for one straightening sheet, Handling and management of the applied cloth becomes easy.

BRIEF DESCRIPTION OF THE DRAWINGS It is the front view seen from the vehicle inside of the vehicle carrying the head protection airbag apparatus of one Embodiment which concerns on this invention. FIG. 6 is a schematic partial enlarged front view of the vicinity of the inflator at the time of operation of the airbag device of the embodiment. It is a schematic sectional drawing of the airbag apparatus of embodiment, and respond | corresponds to the III-III site | part of FIG. It is a schematic sectional drawing of the airbag apparatus of embodiment, and respond | corresponds to the IV-IV site | part of FIG. It is a front view of the airbag used for the airbag apparatus of embodiment. It is a front view which shows the structural member of the airbag of embodiment. It is a front view of a reinforcement sheet material which forms a reinforcement sheet used for an air bag of an embodiment. It is a figure which illustrates in order the process of forming the reinforcement sheet used for the airbag of embodiment. It is a figure which illustrates in order the process of forming the reinforcement sheet used for the airbag of embodiment, and shows the process of the back of FIG. It is a figure which illustrates in order the process of forming the reinforcement sheet used for the airbag of embodiment, and shows the process after FIG. It is a figure which shows the state in which the reinforcement sheet of embodiment was formed. It is a figure which illustrates in order the process of forming the inner tube used for the airbag of embodiment. It is a figure explaining the process of manufacturing the airbag of embodiment. It is a figure explaining the process of manufacturing the airbag of embodiment, and shows the process of the back of FIG. It is a front view which shows the modification of the sheet material for reinforcement of embodiment. It is a front view which shows the other modification of the reinforcement sheet material of embodiment. It is an enlarged front view which shows the connection opening part vicinity formed by the bag weave of the modification of the airbag of embodiment. It is a schematic longitudinal cross-sectional view of the XVIII-XVIII site | part of FIG. It is a figure which illustrates in order the process of forming the 2nd cover part of the reinforcement sheet arrange | positioned in the connection port part shown in FIG. It is a figure which illustrates in order the process of forming the 1st cover part of the reinforcement sheet arrange | positioned in the connection port part shown in FIG. It is a figure explaining the process of forming the inner tube arrange | positioned in the connection port part shown in FIG. It is a figure explaining the process of forming the reinforcement sheet assembly which provided the reinforcement sheet in the inner tube arrange | positioned in the connection port part shown in FIG. It is a front view of the airbag used for the head protection airbag apparatus of other embodiment. FIG. 24 is an enlarged front view of the vicinity of the connection port of the airbag shown in FIG. 23; FIG. 25 is a schematic longitudinal cross-sectional view of the airbag in a state in which the inflator is connected, corresponding to a portion XXV-XXV in FIG. 24. FIG. 25 is a schematic cross-sectional view of the airbag with the inflator connected, corresponding to the XXVI-XXVI portion of FIG. 24. FIG. 25 is a schematic longitudinal cross-sectional view of the airbag at the time of inflation, corresponding to the XXVII-XXVII portion of FIG. 24. It is a front view which shows the structural member of the airbag of FIG. It is a figure explaining the process of forming the 2nd cover part of the reinforcement sheet used for the air bag of FIG. It is a figure explaining the process of forming the reinforcement sheet of the airbag of FIG. It is a figure explaining the process of forming the reinforcement sheet of the airbag of FIG. 23, and shows the process after FIG. It is a figure explaining the process of forming the reinforcement sheet of the airbag of FIG. 23, and shows the process after FIG. It is a figure explaining the process of forming the inner tube used for the airbag of FIG. It is a figure explaining the process of assembling the inner tube and reinforcement sheet of the air bag of FIG. It is a figure explaining the process of assembling | attaching the inner tube and reinforcement sheet | seat of the airbag of FIG. 23, and shows the process after FIG. It is a figure explaining the process of manufacturing the airbag of FIG. It is a figure explaining the process of manufacturing the airbag of FIG. 23, and shows the process after FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the airbag apparatus of the embodiment is a head protection airbag apparatus S, and a head protection airbag (a curtain airbag is also included). Hereinafter, this is simply referred to as an air bag) 30, an inflator 20 for discharging an inflation gas, an air bag cover 11, and a mounting bracket 13. The air bag 30 is provided from the lower edge side of the front pillar FP on the upper edge WU side of the windows (side windows) W1 and W2 juxtaposed back and forth on the side of the front and rear seats inside the vehicle V It is folded and stored in the range from the upper side of the intermediate pillar portion CP to the upper side of the rear pillar portion RP.

  As shown in FIGS. 2 to 4, the inflator 20 is inserted as a substantially cylindrical cylinder type into a connection port 33 (to be described later) for causing the inflation gas G in the air bag 30 to flow, and is connected to the air bag 30. Be done. The inflator 20 is built with a built-in medicine, an igniter, etc. that burns to generate the inflation gas G, and the cylindrical main body 21 and a small diameter cylindrical gas discharge provided at the tip of the main body 21 And a unit 22. The gas discharge portion 22 is provided with a plurality of gas discharge ports 22a, and the inflator 20 discharges the inflation gas G from the gas discharge ports 22a when operating.

  In the inflator 20, the mounting bracket 24 is attached to the base side of the outer peripheral surface 21a of the main body 21, that is, the base outer peripheral surface 21c, so as to sandwich the main body 21. The mounting bracket 24 is bolted 26 Thus, the lower edge 5a of the roof head lining 5 is covered and fixed to the inner panel 2 of the roof side rail portion RR near the upper side of the intermediate pillar portion CP (see FIG. 1). In addition, the inflator 20 is inserted from the distal end side 20a including the gas discharge portion 22 into an insertion-side cylindrical portion 35 described later of the connection port 33, and the insertion-side cylindrical portion 35 is clamped by the clamp 28 as connection means. It is connected to the insertion side cylindrical portion 35 by pressing so as to be held on the inflator 20 side.

  Further, the inflator 20 is operated by a predetermined control device that detects a side collision of the vehicle V or an oblique collision including an offset collision.

  As shown in FIG. 1, each mounting bracket 13 mounts and fixes a mounting portion 60 to be described later of the air bag 30 to the inner panel 2 by a mounting bolt 14. Each mounting bolt 14 is fastened to a screw hole provided with a nut or the like in the inner panel 2.

  As shown in FIG. 1, the airbag cover 11 has a lower edge 4 a side of the front pillar garnish 4 disposed in the front pillar portion FP and a lower edge 5 a side of the roof head lining 5 disposed in the roof side rail portion RR. And consists of.

  As shown in FIGS. 1 and 5, the air bag 30 includes an air bag main body 31 that expands so as to cover the windows W1 and W2, and a flexible straightening sheet disposed in the air bag main body 31 In the case of the form, it is configured to include an inner tube 63 as a straightening cloth and a reinforcing sheet (also referred to as a reinforcing cloth in the case of the embodiment) 70 having flexibility to improve heat resistance.

  The air bag body 31 allows the inflating gas G from the inflator 20 to flow in and expands from the folded state to expand and inflate the windows W1 and W2, the intermediate pillar portion CP, and the rear pillar portion RP so as to cover the inside of the vehicle. Do. As shown in FIGS. 2 to 5, the air bag main body 31 separates the vehicle inner side wall 32a as a front side wall facing the inflow of the inflation gas G and the outer side wall 32b as a rear side wall. And the non-inflow portion 45 which does not allow the expansion gas G to flow in such a state that the inner side wall portion 32a and the outer side wall portion 32b are combined.

  The gas inflow portion 32 is configured to allow the inflation gas G from the inflator 20 to flow into the main body inflating portion 37 and the main body inflating portion 37 covering the vehicle inner side of the windows W1 and W2, the intermediate pillar portion CP, and the rear pillar portion RP. And the cylindrical connection port part 33 connected with the inflator 20, and it is comprised.

  The connection port 33 is disposed so as to project upward from near the center of the main body expansion portion 37 in the front-rear direction. The connection port 33 is connected to the main body side tubular portion 34 connected with the main body inflation portion 37 so as to project upward substantially perpendicularly from the main body inflation portion 37 side, and the upper end of the main body side cylindrical portion 34 An insertion side cylindrical portion 35 connected to the main body side cylindrical portion 34 so as to project rearward substantially orthogonally from the side cylindrical portion 34 and inserting the inflator 20 from the opening 35 c at the rear end to be connected to the inflator 20; It is configured as having an L-shape, and is mounted on the vehicle V as a bent state.

  Further, the main body expansion portion 37 is provided with a front side expansion portion 39 disposed to cover the vehicle inside of the window W1 when the inflation is completed, and a rear side expansion portion 40 disposed to cover the vehicle inside of the window W2. And a supply passage portion 38 disposed in a cylindrical shape along the front-rear direction on the side of the upper edge 31 a of the air bag body 31. The supply passage portion 38 is connected to the connection port 33 at an intermediate portion in the front-rear direction, and the inflation gas G from the connection port 33 is utilized with the inner tube 63 and the front inflating portion 39 and the rear inflating It becomes a part supplied to the part 40.

  Furthermore, in the case of the embodiment, the air bag body 31 is a connecting member that constitutes the mounting portion 60 of the non-inflow portion 45 described later and the vehicle inner side wall 32a and the vehicle outer wall 32b of the connection port 33 as constituent members. The cloth material 52 (see FIGS. 3, 4, 6, and 13) and the woven and woven part 47 which constitutes the part of the main body expansion part 37 and is formed of a woven cloth are composed of three kinds of members. The sack weave portion 47 is formed by sack weave from yarn of polyamide, polyester or the like, and constitutes the gas inflow portion 32 which is inflated so as to allow the inflating gas G to flow to separate the in-vehicle side wall portion 32a and the vehicle outer side wall portion 32b. And a closing portion 49 disposed around the gas inflow portion 32. As shown in FIG. Further, the reinforcing sheet material 90 for forming the reinforcing sheet 70, the tube sheet material 68 for forming the inner tube 63, and the below-mentioned A guide cloth (also referred to as a guide sheet) 94 is formed of a flexible sheet material, for example, a cloth material obtained by plain-weaving a yarn such as polyamide.

  The non-inflow portion 45 is configured of a peripheral portion 46 and a mounting portion 60. The peripheral portion 46 is formed so as to surround the periphery of the gas inflow portion 32, and the upper edge 46 a located on the upper edge 31 a side of the airbag body 31 is a closed portion 49 of the woven portion 47 And a bag forming suture portion 55 formed by stitching integrally with the connection opening cloth material 52 or the like.

  The closing portion 49 includes an upper front closing portion 49a and an upper rear closing portion 49b on the upper edge 31a side of the airbag main body 31, and the divided portion 50 as an opening is disposed between the two. There is. As shown in FIGS. 3, 5 and 13, in the inner side wall 32a and the outer side wall 32b of the periphery of the divided portion 50, the extended portion on the lower edge side of the connection opening cloth 52 (52I, 52O) Each 52 c is sutured by the connecting suture portion 57.

  The connection opening cloths 52I and 52O, as shown in FIGS. 3 to 6 and 13, form the inner side wall 32a and the outer side wall 32b of the connection opening 33, and each of them is a main body side cylinder Body side 52a forming the portion 34, insertion side 52b forming the insertion side tube portion 35, and an extending portion 52c to be sewn to the body expanding portion 37 side, in other words, the dividing portion 50 side; Have.

  Then, the inner side wall portion 32a and the outer side wall portion 32b in the divided portion 50 and the connection port portion 33 are sewn together by the front edge side stitching portion 55a and the rear edge side stitching portion 55b of the bag forming stitching portion 55. ing. The front edge side suture portion 55a extends rearward from the upper front closing portion 49a, passes through the dividing portion 50, and from the front edge 34a of the main body side tubular portion 34 of the connection port 33 to the inner side wall of the upper edge 35a of the insertion side tubular portion 35. The portion 32a and the outer wall 32b are sewn together (see FIGS. 5 and 14). The rear edge side suture portion 55b extends forward from the upper rear closing portion 49b, passes through the dividing portion 50, and from the rear edge 34b of the main body side cylindrical portion 34 of the connection port 33 to the inner side wall of the lower edge 35b of the insertion side cylindrical portion 35 The portion 32a and the outer wall 32b are sewn together (see FIGS. 5 and 14).

  In the case of the embodiment, the front edge side suture portion 55a of the bag forming suture portion 55 also co-stitches the inner tube 63 and the reinforcing sheet 70 together with the inner wall portion 32a and the outer wall portion 32b. The rear edge side suture portion 55b similarly sutures the inner tube 63 and the reinforcing sheet 70 together with the inner wall portion 32a and the outer wall portion 32b, and the inner tube 63 and the suture portions 75 and 85 described later of the reinforcing sheet 70 also It is sewing together.

  As shown in FIG. 5, a plurality of (six in the embodiment) mounting portions 60 are formed so as to project upward from the upper edge 46 a of the peripheral edge 46 on the upper edge 31 a side of the airbag body 31. Each mounting portion 60 is formed with a mounting hole 60 a through which the mounting bolt 14 is inserted. As described above, the mounting bracket 13 for mounting to the inner panel 2 on the body 1 side is fixed to each mounting portion 60, and the mounting bolt 14 passing through each mounting hole 60a is a screw of the inner panel 2 The respective mounting portions 60 are fixed to the inner panel 2 by being fastened to the holes.

  The mounting portion 60F at the front end is formed of a separate cloth material formed of a woven fabric such as polyamide, and is formed by being sewn to the front edge 46c of the peripheral portion 46 formed of a bag weave of the air bag body 31. It is done. The mounting portion 60F is fixed near the lower portion of the front pillar portion FP, and the lower edge 31b side of the airbag 30, specifically, the mounting portion 60F and the front pillar portion FP, when the inflation of the airbag 30 is completed. A strong tension is exerted on a line connecting the mounting portion 60 (60B, see FIG. 1) apart from the above, and the air bag 30 is configured to have a favorable restraint on the indoor side of the occupant.

  The second mounting portion 60S from the front is disposed by being sewn to the cloth material of the mounting portion 60F.

  The inner tube 63 as the straightening sheet is disposed so as to extend from the inside of the connection port 33 of the air bag main body 31 into the inside of the supply passage 38 in the vicinity of the connection port 33 as shown in FIGS. . That is, the inner tube 63 is disposed in the connection port portion 33, and the connection tube portion 64 to be connected to the inflator 20 by inserting the distal end side 20a of the inflator 20, and the connection tube portion 64 to the airbag main body 31. The outlet portion 65 extends to the supply passage portion 38 on the main body expansion portion 37 side, and causes the inflation gas G from the inflator 20 to branch out from the outlets 65a and 65b on both ends at the end portion side. . An insertion port 64a for inserting the inflator 20 is opened at the rear end of the connection cylindrical portion 64, and the outflow portion 65 flows so as to face the front and rear ends on the lower edge 63c side of the inner tube 63 in the front and rear direction. The outlets 65a and 65b are opened.

  The inner tube 63 is formed of a single flexible tube sheet 68, as shown in FIGS. As described above, the tube sheet material 68 is formed of a woven fabric such as polyamide, folded at the center along the fold line 68a along the front-rear direction, and folded at portions of the insertion port 64a and the outflow ports 65a and 65b. Except for this, it is formed by sewing the folded outer peripheral edge. That is, in the inner tube 63, the inboard portion 63a as the front side and the outboard portion 63b as the back side extend upward from the fold line 68a, excluding the insertion port 64a and the outlets 65a and 65b. The outer peripheral edges of the inboard portion 63a and the outboard portion 63b are formed by being sewn together. In other words, the inner tube 63 is disposed with the fold line 68a down and the suture parts 66a, 66b and 66c on the upper edge side.

  The reinforcing sheet 70 is disposed inside the inner tube 63 disposed in the connection port 33, as shown in FIGS. Specifically, the reinforcing sheet 70 is disposed in the inner tube 63 and in the vicinity of the upper portions of the connection cylindrical portion 64 and the outflow portion 65. In other words, the reinforcing sheet 70 is disposed across the inside of the connection cylinder 64 and the inside of the outlet 65 of the area not reaching the supply path 38. The reinforcing sheet 70 is disposed so as to cover the periphery of the distal end 20 a of the inflator 20 and a portion (a portion of the space in front of the distal end 20 a) separated from the inflator 20 along the axial direction ID of the inflator 20. A first cover 71 and a second cover 81 are provided to cover these parts.

  As shown in FIG. 2, the first cover portion 71 is a direction away from the tip end 20 a of the inflator 20 along the axial direction ID of the inflator 20, in other words, the distal end of the inflator 20 in the axial direction ID of the inflator 20. A cross direction fold line 72 in a direction crossing the axial direction ID of the inflator 20 so as to cover the tip side 20a of the inflator 20 at the opposing edge (opposite edge) side, in the embodiment, the front edge 70a of the reinforcing sheet 70 And folded in two, by both ends away from the fold 72 of the inboard portion 73 as the front side located on both sides of the cross direction side fold 72 and the outboard portion 74 as the back side, The tip end side 20a of the inflator 20 is wrapped around and disposed. The first cover portion 71 covers the circumference of the gas discharge portion 22 of the inflator 20 from the cylindrical wrap portion 71a wound around the tip outer peripheral surface 21b side of the main body portion 21 of the inflator 20 and the cylindrical wrap portion 71a And a gas flow passage portion 71b at a portion up to the side fold 72.

  The second cover portion 81 has an axial-side fold 82 along the axial direction ID of the inflator 20 on the separation edge side away from the main body expansion portion 37 of the air bag body 31, in the embodiment, on the upper edge 70b side of the reinforcing sheet 70. It is provided and folded in two, and is disposed so as to wrap the tip side 20a of the inflator 20 by the inboard portion 83 as the front side extending from the axial side fold 82 and the outboard portion 84 as the back side. There is. The second cover portion 81 covers the periphery of the gas discharge portion 22 of the inflator 20 from the cylindrical wrap portion 81a which is wound around the tip outer peripheral surface 21b of the main body portion 21 of the inflator 20 and the cylindrical wrap portion 81a. And a gas flow passage portion 81b of a portion directed to the front edge 70a side of the 70.

  The first cover portion 71 and the second cover portion 81 are arranged such that the cross direction side fold 72 and the axial direction side fold 82 are continuous at a position apart from the gas discharge portion 22 of the tip of the inflator 20. As well as being arranged in duplicate (in duplicate), openings 71c and 81c for opening the outlet 65 side of the inner tube 63 as a flow straightening sheet are provided on the lower end side and arranged. Furthermore, in the case of the embodiment, the second cover portion 81 is disposed inside the first cover portion 71.

  In the embodiment, in the case of the embodiment, the heat resistance of the connection port 33 and the heat resistance of the inner tube 63 as a flow straightening sheet with respect to the inflation gas G discharged from the gas discharge portion 22 of the inflator 20. Are provided to improve the Further, in the case of the embodiment, the reinforcing sheet 70 is a portion in which the cross direction side fold line 72 of the first cover portion 71 and the second cover portion 81 and the axial direction side fold line 82 are connected to each other. So that the inflation gas G discharged from the gas discharge portion 22 does not directly hit the suture portion 66a of the upper front edge of the connection cylindrical portion 64 and the outlet portion 65 of the inner tube 63, from the inside of the suture portion 66a. Covering.

  In the embodiment, as shown in FIG. 11, the first cover portion 71 spreads the cross-direction-side fold 72 toward the opening 71 c from the axial orthogonal direction VD of the inflator 20 (see FIG. 11). In the embodiment, about 45 °) is provided and disposed to be inclined.

  Furthermore, in the embodiment, in the first cover portion 71, the reinforcing portion 77 for improving the heat resistance is disposed on the inner peripheral side of the gas flow path portion 71b including the portion of the cross direction side fold 72, and the second cover In the portion 81, a reinforcing portion 86 that enhances the heat resistance is disposed on the outer peripheral side of the gas flow passage portion 81b including the portion of the axial side fold 82.

  And the 1st cover part 71 and the 2nd cover part 81 of an embodiment are formed from sheet sheet 90 for reinforcement of a sheet of textiles, such as polyamide mentioned above, as shown in FIGS. There is. The reinforcing sheet member 90 is configured by connecting a first cover component 91 forming the first cover 71 and a second cover component 92 forming the second cover 81 by the connector 93. There is.

  The first cover configuration portion 91 is configured to include a main body portion 91a and a lamination reinforcing portion 91b. The main body portion 91a is configured to extend the inboard portion 73 and the outboard portion 74 from the arrangement position of the cross direction side fold 72, and the inward crossing portion of the inboard portion 73 and the outboard portion 74 A substantially trapezoidal portion in the vicinity of 72 is made to face in the vehicle inside and outside direction to form a flow path side construction portion 91ab (see the hatched portion in FIG. 7) forming the gas flow path portion 71b and adjacent to the flow path side construction portion 91ab The substantially rectangular shaped portions are opposed in the vehicle interior and exterior direction to form a cylindrical side portion 91 aa forming the cylindrical wrap portion 71 a. The stacking reinforcing portion 91b is disposed to extend from the edge of the flow path-side component 91ab of the vehicle outside portion 74, and is provided with a fold 91c at the edge and folded at the main body portion 91a. The Rukoto. In the case of the embodiment, the main body portion 91a and the reinforcing portion are formed by the stitching portion 91d (see B in FIG. 9) sewn in a substantially U-shape after stacking so that the reinforcing portion 91b does not shift from the main body portion 91a. 91b will be sewn.

  The second cover component 92 includes a main body 92 a and a lamination reinforcing part 92 b. The main body portion 92 a is configured to extend the inboard portion 83 and the outboard portion 84 from the arrangement position of the axial side folds 82, and the axial direction fold of the inboard portion 83 and the outboard portion 84 thereof From the channel side component 92ab to the channel side component 92ab (see the hatched portion in FIG. 7) forming the gas channel part 81b by opposing the substantially rectangular shaped part having a width dimension from 82 in the vehicle inside-outside direction. A substantially rectangular portion narrowing the width dimension from the axial side fold 82 along the axial side fold 82 is opposed in the vehicle interior and exterior direction to form a cylindrical wrap portion 81a. And The reinforcing portion 92b for lamination is disposed to extend from an edge of the flow path side component 92ab of the inboard portion 83 and the outboard portion 84 away from the cylinder side component 92aa, and a fold is formed at the edge 92c are attached and folded on the side of the main body 92a. In the case of the embodiment, the main body portion 92a and the reinforcing portion 92b are formed by the stitched portion 92d (see A in FIG. 9) sewn in a substantially rectangular shape after overlapping so as not to shift the reinforcing portion 92b from the main body portion 92a. And will be sewn.

  Furthermore, in the embodiment, the outer peripheral surface 21a of the inflator 20 can be easily inserted into the reinforcing sheet 70 through the insertion opening 70e of the reinforcing sheet 70 when the sutured portion 92d is formed. A substantially rectangular plate-like guide cloth 94 is co-stitched on the main body 92 a of the second cover component 92 so as to allow direct contact and guidance. The guide cloth 94 is folded at a fold that coincides with the axial fold 82, and is formed in a substantially cylindrical shape so as to be able to slide on the outer peripheral surface 21b of the main body 21 of the inflator 20. The guide cloth 94 is provided with grip portions 94a protruding from the insertion opening 70e, and the tip end side 20a of the inflator 20 can be inserted into the insertion portion 70d while gripping these grip portions 94a. The insertion operation to 70 d can be made easy.

  First, as shown in A and B of FIG. 8, the guide cloth 94 is disposed at a predetermined position on the inner peripheral side of the main body 92 a of the second cover forming part 92. A fold 92c is formed, and the lamination reinforcing portion 92b is folded on the side opposite to the arrangement side of the guide cloth 94 in the main body 92a (the outer peripheral side of the main body 92a) as shown in B of FIG. As shown in FIG. 5, a suture thread 92 made of polyamide or the like is used to form a suture portion 92 d to form a reinforcement portion 86. Next, as shown in A and B of FIG. 9, a fold 91 c is provided, and the lamination reinforcing portion 91 b is folded on the inner peripheral side of the main portion 91 a of the first cover configuration portion 91, and the suture thread 95 is used. The suture portion 91d is provided to form the reinforcing portion 77.

  After that, as shown in B of FIG. 9 and A of FIG. 10, a fold is made to the portion of the connecting portion 93, and the second cover forming portion 92 is placed on the inner side of the first cover forming portion 91. The second cover component 92 is folded along with the guide cloth 94 by placing an axial fold 82 on the second cover component 92 as shown in A and B of FIG. At this time, the outer shape of the second cover portion 81 is formed.

  Thereafter, as shown in B and C of FIG. 10, the cross direction side fold 72 is provided, and the first cover component 91 is placed on the inboard portion 73 of the first cover component 91 while the second cover portion 81 is placed. If the inboard portion 73 of the cover configuration portion 91 is placed on the outboard portion 74, the outer shape of the first cover portion 71 is also formed, and the reinforcing sheet 70 is formed.

  In the embodiment, as shown in FIG. 10C and FIG. 11, the displacement between the first cover 71 and the second cover 81 is prevented, and the in-vehicle portion 73 of the first cover 71 and the car are further prevented. Sutures 75, 76, 85 are sutured using suture 95 to prevent misalignment with the outer portion 74.

  The suture portion 75 is a portion on the lower edge side of the periphery of the insertion portion 70d into which the distal end side 20a of the reinforcing sheet 70 is inserted, and the lower edge of the inboard portion 73 and the outboard portion 74 of the first cover portion 71. It is formed by sewing the back side mutually. The suture portion 76 is a portion of the upper edge 70 b of the reinforcing sheet 70, and the overlapping outer peripheral edges of the inboard portion 73 and the outboard portion 74 extending rearward from the cross direction fold 72 of the first cover portion 71. Suture is formed. The suture portion 85 is a portion on the lower edge side of the peripheral edge of the insertion portion 70d into which the distal end side 20a of the reinforcing sheet 70 is inserted, and the lower edge of the inboard portion 83 and the outboard portion 84 of the second cover portion 81. It is formed by sewing the back side mutually.

  In the embodiment, the stitching portions 75 and 85 are formed by co-sewing the inboard portions 73 and 83 and the outboard portions 74 and 84 of the first cover portion 71 and the second cover portion 81, The same suture site but with different reference numerals.

  The reinforcing sheet 70 thus formed is, as shown in FIG. 11, a cylindrical insertion portion 70d in which an insertion port 70e is provided on the rear end side, the front end 20a of the inflator 20 can be inserted forwardly. And, on the lower edge 70c side of the front edge 70a side, a discharge portion 70f is formed in which the discharge port 70g for flowing out the expansion gas G is disposed. The release portion 70f receives the inflation gas G discharged from the gas discharge port 22a of the gas discharge portion 22 of the inflator 20, and the discharge port 70g, in other words, the first cover portion 71 and the second cover portion 81. It will be discharged from the openings 71c and 81c. Further, in the embodiment, the portion of the release portion 70 f is configured by the gas flow path portions 71 b and 81 b of the first cover portion 71 and the second cover portion 81.

  The reinforcing sheet 70 thus formed is placed on the tube sheet material 68 before being folded as shown in A to C in FIG. Sutures 95 are used to sew predetermined outer peripheries other than the insertion port 64 a and the outlets 65 a and 65 b with 63 b. That is, in the embodiment, a suture portion 66b on the outer peripheral edge between the insertion opening 64a on the rear edge side of the inner tube 63 and the outflow port 65b is formed, and the inboard portion 63a is branched from the suture portion 66b. A suture portion 66c is formed to suture with the vehicle outer side portion 63b in an L shape.

  The sutured portion 66 b and the sutured portion 66 c are partially sewn with the reinforcing sheet 70. Therefore, at this time, while the shape of the inner tube 63 is formed, the reinforcing sheet 70 is also fastened to the inner tube 63, and the inner tube 63 provided with the reinforcing sheet 70, in other words, the reinforcing sheet assembly 97, It will be formed.

  In the case of the embodiment, the portion (upper front edge) of the outer peripheral edge between the outlet 65a at the front edge of the inner tube 63 and the insertion port 64a is the front edge side suture portion of the connection port 33 in the case of the embodiment. When the inner tube 63 is formed, the inboard portion 63a of the upper front edge and the outboard portion 63b are mutually sewn to form a suture portion 66a. You may leave it.

  Thereafter, the reinforcing sheet assembly 97 provided with the reinforcing sheet 70 on the inner tube 63 is assembled to the air bag main body 31. At that time, in the air bag main body 31, as shown in A and B of FIG. 13, the cloth material for the connection opening portion is made in advance to the inner side wall 32a and the outer side wall 32b of the divided portion 50 of the sack woven portion 47. 52I and 52O are sewn together by providing a connection suture portion 57 using a suture thread 95. Next, as shown in FIGS. 14A and 14B, the reinforcing sheet assembly 97 is disposed between the open connection opening cloths 52I and 52O. Then, the front edge side suture portion 55a and the rear edge side suture portion 55b of the bag forming suture portion 55 using the suture thread 95 are provided, and the connection opening cloths 52I and 52O, the reinforcing sheet 70, and the inner tube 63 are provided. , And the connection port 33 can be formed, and the reinforcing sheet assembly 97 in which the reinforcing sheet 70 is provided on the inner tube 63 can be disposed and fixed in the connection port 33. The portions to be stitched together with the connection opening cloths 52I and 52O by the front edge side suture portion 55a are the upper front edge 66a of the inner tube 63 and the upper edge of the reinforcing sheet 70 on the upper side of the axial fold 82 70b (see FIG. 11). The portions to be stitched together with the connection opening portion cloth materials 52I and 52O by the rear edge side suture portion 55b overlap the suture portions 75 and 85 of the reinforcing sheet 70, and the insertion side cylindrical portion 35 of the inner tube 63 and the reinforcing sheet 70. On the lower edge side of the In other words, the leading edge side suture portion 55a does not stitch the portion of the axial side fold 82.

  Then, the attachment portion 60 is sewn to a predetermined portion, whereby the airbag 30 can be formed.

  Thereafter, the air bag 30 is folded so that the lower edge 31b side approaches the upper edge 31a side, and a tearable tape (not shown) for preventing breakage is wound, and the mounting bracket 13 is attached to the mounting portion 60. Insert the distal end side 20a of the inflator 20 into the insertion portion 70d of the reinforcing sheet 70 in the connection cylindrical portion 64 of the inner tube 63 from the opening 35c side of the insertion side cylindrical portion 35 of the portion 33 through the insertion port 70e The airbag assembly 99 can be assembled by fastening the clamp 28 so as to press the clamp 28 toward the inflator 20 from the outer peripheral side of the insertion side cylindrical portion 35 and connecting the inflator 20 to the insertion side cylindrical portion 35.

  Then, the airbag assembly 99 assembled in this manner arranges the mounting portions 60 assembled with the mounting bracket 13 at the corresponding mounting sites of the inner panel 2 on the body 1 side, and inserts them into the mounting holes 60a. Then, the mounting bolt 14 is fastened to the screw hole, and further, the mounting bracket 24 is fastened with the bolt 26 to fix the inflator 20 to the inner panel 2, and the airbag assembly 99 is mounted to the body 1. Next, a lead wire (not shown) extending from a predetermined control device for operating the inflator is connected to the inflator 20, the front pillar garnish 4 and the roof head lining 5 are attached to the body 1, and the intermediate pillar garnish 7 and the rear pillar garnish 8 are further attached. If attached to the body 1, the head protection airbag device S can be mounted on the vehicle V.

  After the head protection airbag device S is mounted on the vehicle V, when the inflator 20 is activated, the inflation gas G is discharged from the gas discharge port 22a of the gas discharge portion 22 of the inflator 20, and the air bag 30 is connected. It flows from the mouth 33 to the main body expansion portion 37 side. Specifically, as shown in FIGS. 2 to 4, the inflation gas G flows out from the gas discharge port 22 a of the gas discharge unit 22 to the discharge portion 70 f of the reinforcing sheet 70, and the inner tube 63 from the discharge port 70 g of the discharge portion 70 f The solution flows out to the upper portion of the outlet 65, reaches the lower edge 63c of the inner tube 63, branches to both the front and rear, and from the outlets 65a and 65b at the front and rear both ends of the outlet 65 The air bag 30 pushes the air bag cover 11 open as it flows through the supply passage 38 in the inflating portion 37 to the front inflating portion 39 and the rear inflating portion 40 of the main body inflating portion 37 as shown in FIG. As indicated by the dot-and-dash line, the windows W1 and W2, the intermediate pillar portion CP, and the rear pillar portion RP are expanded and expanded so as to cover the inner side of the vehicle.

  Then, in the head protection airbag device S of the embodiment, as shown in FIGS. 2 to 4 when in operation, the inflation gas G discharged from the tip end side 20a of the inflator 20 is a connection port portion of the airbag main body 31. Inside 33, it flows along the insertion side cylinder part 35, and it bends from the insertion side cylinder part 35, flows into the main body side cylinder part 34, and flows into the main body expansion part 37 side. At that time, in the inside of the reinforcing sheet 70, the inflation gas G which is bent from the insertion-side cylindrical portion 35 and flows to the main-body-side cylindrical portion 34 passes through the openings 71c and 81c and the outlet 65 of the inner tube 63 as a straightening sheet. It flows to the side, but in front of that, it strikes the portion (front edge 70 a) of the cross direction fold line 72 of the first cover portion 71 of the reinforcing sheet 70. However, as shown in FIGS. 2 and 4, in the region of the fold line 72, the inboard portion (front side portion) 73 of the first cover portion 71 and the outboard portion (rear side portion) 74 are continuously connected. (Not shown), and the conventional reinforcing sheet (a cloth material such as plain weave or the like is not formed because it is not a portion formed by stitching the inboard portion 73 and the outboard portion 74 of the first cover portion 71. The heat resistance can be improved as compared with the reinforcing cloth). Also, the inflation gas G discharged from the gas discharge port 22a on the tip end side 20a of the inflator 20 hits the opposite separation edge 70b side away from the openings 71c and 81c in the reinforcing sheet 70, but the location is shown in FIG. As shown in FIGS. 2 and 3, the portion of the axial side fold 82 of the second cover portion 81 is disposed, and the portion of the fold 82 also corresponds to the inner side (front side) 83 of the second cover 81. And a vehicle outer side portion (rear side portion) 84 are continuously formed in a continuous line, and formed by sewing the vehicle inner side portion 83 of the second cover portion 81 and the vehicle outer side portion 84 It is heat resistant because it is not a site where And the reinforcement sheet 70 is formed only by overlappingly arranging the first cover portion 71 and the second cover portion 81 so that the cross direction side fold line 72 and the axial direction side fold line 82 are connected. Since it can do, the reinforcement sheet 70 which had heat resistance can be manufactured simply.

  Therefore, in the airbag device S of the embodiment, the heat resistance of the reinforcing sheet 70 disposed in the connection port 33 of the airbag 30 can be easily improved.

  And, of course, in the reinforcing sheet 70 according to the embodiment, the gas of the inflator 20 is provided by the portion where the cross direction fold line 72 of the first cover part 71 and the second cover part 81 and the axial direction fold line 82 are connected. The expansion gas G discharged from the discharge portion 22 is not directly hit on the connecting cylindrical portion 64 of the inner tube 63 or the suture portion 66 a of the upper front edge of the outlet 65, and the heat resistance of the inner tube 63 Improve.

  In the embodiment, the air bag 30 is disposed inside the main body expansion portion 37 in the vicinity of the connection port 33 and the connection port 33 of the air bag main body 31, and the reinforcing sheet 70 is disposed on the inner peripheral side. The inner tube 63 is provided with the connection tube portion 64 and the outlet portion 65, and the inner tube 63 is provided with a flexible straightening sheet having flexibility. The connection cylindrical portion 64 is disposed in the connection port portion 33 and is inserted into the distal end side 20 a of the inflator 20 to be connected to the inflator 20 with the reinforcing sheet 70 interposed therebetween. The outlet portion 65 extends from the connection cylindrical portion 64 to the main body expansion portion 37 side, and at the end portion side (lower edge 63c side), the inflation gas G from the inflator 20 which has flowed in through the connection cylindrical portion 64 It is configured to have at least two outlet ports 65a and 65b which can be branched and discharged to both sides.

  Therefore, in the embodiment, the inner tube 63 as a flow straightening sheet whose heat resistance is improved by the reinforcing sheet 70 causes the inflation gas G of the inflator 20 to flow to the outlet port 65 through the connection cylindrical portion 64 and flowed. From the outlets 65a and 65b of at least the front and rear sides of the outlet portion 65, the front inflating portion 39 and the rear inflating portion 40 on the side of the main body inflating portion 37 of the airbag body 31 can be smoothly branched and flowed out.

  Then, in the airbag device S of the embodiment, the inner tube 63 as the straightening sheet is formed of a single flexible tube sheet 68, and the fold 68a is formed on the outlet 65 side. It is provided and folded in two, and the overlapped outer peripheral edges are sewn together and formed.

  Therefore, in the embodiment, the expansion gas G flows through the openings 71 c and 81 c of the reinforcing sheet 70 to the outlet 65 of the inner tube 63 and flows out from the outlets 65 a and 65 b on both sides. It hits the part of the fold line 68a of the exit part 65, but the part is formed by continuously connecting the inboard part 63a as the front side part of the inner tube 63 and the outboard part 63b as the back side part The heat resistance is improved because it is not the site of the fold line 68a but the area formed by sewing the inboard portion 63a and the outboard portion 63b of the inner tube 63 together. Therefore, in the above configuration, the heat-resistant inner tube 63 can be easily formed.

  Of course, if the above points are not taken into consideration, the portion of the upper front edge 66a of the inner tube 63 is used as a fold, and the sheet for the tube is used such that it is folded in half. The lower edge 63c and the rear inner peripheral edge (the disposed edge of the suture portion 66b) may be sewn to form an inner tube as a straightening sheet.

  Further, in the airbag device S of the embodiment, the second cover portion 81 of the reinforcing sheet 70 is disposed inside the first cover portion 71.

  Therefore, in the embodiment, the second cover portion 81 having the axial side fold 82 is disposed on the inside approaching the inflator 20, and the inflation gas G discharged from the distal end side 20a of the inflator 20. The second cover 81 is in contact with the portion of the axial direction fold 82 of the second cover portion 81 closer to the inflator 20 than the first cover portion 71 of the reinforcing sheet 70, and the second cover It is guided by the cross direction side fold line 72 of the first cover part 71 from the portion of the axial side fold line 82 of the part 81 and flows toward the main body expansion part 37 side. That is, the inflation gas G discharged from the distal end side 20 a of the inflator 20 flows smoothly from the insertion side tubular portion 35 of the connection port 33 toward the main body side tubular portion 34, and the upstream side of the inflation gas G The reinforcing sheet 70 can exhibit heat resistance more suitably.

  Of course, if this point is not taken into consideration, the first cover portion 71 may be disposed inside the second cover portion 81. For example, if the second cover portion 81 is formed long in the front and rear direction, and the upper end of the cross direction side fold 72 is placed in a position shifted rearward from the front end of the axial side fold 82 The first cover portion 71 can be disposed inside the second cover portion 81 in a state in which the direction side fold 72 and the axial side fold 82 are linked.

  Further, in the airbag device S of the embodiment, the first cover portion 71 of the reinforcing sheet 70 is inclined such that the cross direction side fold 72 is expanded from the direction perpendicular to the axis of the inflator 20 toward the opening 71c. An angle θ (about 45 ° in the embodiment) is provided and disposed to be inclined (see FIG. 11).

  Therefore, in the embodiment, after the inflation gas G discharged from the gas discharge port 22a on the tip side 20a of the inflator 20 hits the cross direction side fold 72 portion, the cross direction side fold 72 position Since the flow is guided by the inclination angle θ so as to be guided to the opening 71c side, the pressure rise near the cross direction side fold 72 is suppressed, and the expansion gas G near the cross direction side fold 72 is smoothed. Can flow through the openings 71 c and 81 c of the reinforcing sheet 70 to the outflow port 65 side of the inner tube 63 as the flow straightening sheet and the main body expansion portion 37 side.

  If this point is not considered, the cross direction side fold 72 may be provided so as to be orthogonal to the axial direction ID of the inflator 20 without providing the inclination angle θ.

  In the embodiment, although the inclination angle θ is 45 °, the inclination angle θ is 15 to 75 in order to secure a compact arrangement space of the fold 72 and to ensure smooth gas guidance. It is preferably in the range of °, and more preferably in the range of 30 to 60 °. Incidentally, if the inclination angle θ is smaller, the dimension of the reinforcing sheet 70 in the front-rear direction can be reduced along with the reduction in the cross-direction side fold 72 in the front-rear direction, so that the reinforcing sheet 70 can be configured compactly. Therefore, if the strength of the reinforcing sheet material 90 of the reinforcing sheet 70 is large, the reinforcing sheet 70 may be configured compactly with the inclination angle θ set to less than 15 °, for example, in the range of 0 to 5 °.

  Furthermore, in the airbag apparatus S of the embodiment, the separable portion 70 is provided between the separation edges 70b of the first cover portion 71 of the reinforcing sheet 70 which is separated from the main body expansion portion 37 continued from the cross fold side 72 I am sewing it.

  Therefore, in the embodiment, the separation edges 70b separated from the opening 71c of the inboard portion (front side) 73 and the outboard portion (rear side) 74 of the first cover portion 71 of the reinforcing sheet 70 are sewn together Therefore, when the first cover 71 is disposed in the inner tube 63 (in the connection port 33) as a straightening sheet, the inboard portion 73 and the outboard portion 74 of the first cover portion 71 are displaced. It is difficult to easily arrange the first cover 71 of the reinforcing sheet 70 at a predetermined position in the inner tube 63 (in the connection port 33).

  Of course, since the first cover portion 71 is fastened together with the inner tube 63 to the distal end side outer peripheral surface 21b of the inflator 20 at the time of connection with the inflator 20, the inner tube 63 and the connection port The suture portion 76 may be omitted because the portion 33 is finally arranged without shifting. Furthermore, in the embodiment, the inner tube 63 and the first cover portion 71 are also sewn together by the front edge side suture portion 55a and the rear edge side suture portion 55b forming the connection port 33, so the suture portion 76 can be saved. It may be

  Further, in the airbag device S of the embodiment, the second cover portion 81 of the reinforcing sheet 70 is separated from the portion of the axial fold 82, and an opening (insertion opening) 70e for inserting the opening 81c and the inflator 20. The edge 70c adjacent to the side is sewn by providing a suture portion 85.

  Therefore, in the embodiment, when the second cover portion 81 of the reinforcing sheet 70 is disposed in the inner tube 63 (in the connection port 33), the inboard portion 83 and the outboard portion 84 of the second cover portion 81 are provided. The second cover portion 81 of the reinforcing sheet 70 can be easily disposed at a predetermined position in the inner tube 63 (in the connection port portion 33).

  Of course, since the second cover portion 81 is also fastened together with the inner tube 63 to the distal end side outer peripheral surface 21b of the inflator 20 at the time of connection with the inflator 20, the inner tube 63 and the connection port The suture portion 85 may be omitted because the portion 33 is finally disposed without shifting. Furthermore, in the embodiment, the inner tube 63 and the second cover portion 81 are also sewn together by the rear edge side suture portion 55b forming the connection port 33, so the suture portion 85 may be omitted.

  Further, in the airbag device S of the embodiment, the first cover portion 71 and the second cover portion 81 are separated from the axial fold 82 and connected to the openings 71c and 81c, and an opening for inserting the inflator 20. The lower edge sides of the (insertion port) 70 e are overlapped with each other, and are sewn together as suture portions 75 and 85.

  Therefore, in the embodiment, the first cover portion 71 and the second cover portion 81, including the inboard portions 73 and 83 and the outboard portions 74 and 84, do not easily shift from each other, and the inner tube 63 The reinforcing sheet 70 can be easily disposed at a predetermined position in the connection port 33).

  Of course, since the suture portions 75 and 85 are sewn by the rear edge side suture portion 55b with respect to the inner tube 63 and the connection port 33, if the above point is not taken into consideration, the formation of the reinforcing sheet 70 It is not necessary to provide the sewn parts 75 and 85 to be sewn. Alternatively, the suture portions 75 and 85 may be disposed at mutually offset positions.

  Furthermore, in the airbag apparatus S of the embodiment, the first cover portion 71 and the second cover portion 81 are formed of a single reinforcing sheet material 90 connected to each other.

  Therefore, in the embodiment, since the first cover portion 71 and the second cover portion 81 are connected in advance using the connecting portion 93, handling becomes easy, and the first cover portion 71 and The work of connecting the second cover portion 81 can be reduced.

  Of course, the first cover portion 71 and the second cover portion 81 are fastened to the outer peripheral surface 21b of the tip end side of the inflator 20 by the clamps 28 and are mutually connected or at the time of joint sewing of the suture portions 75 and 85. As shown in FIG. 15, the first cover portion is connected to each other when forming the reinforcing sheet 70, when forming the inner tube 63, and when forming the connection port 33. The first cover component 91 forming the part 71 and the second cover component 92 forming the second cover part 81 may be separated from each other.

  Furthermore, in the airbag device S of the embodiment, the first cover portion 71 is configured to include the reinforcing portion 77 in which the vicinity of the cross direction side fold 72 has a two-layer structure. Similarly, the second cover portion 81 is configured to include a reinforcing portion 86 having a two-layer structure in the vicinity of the axial side fold 82.

  Therefore, in the embodiment, the first cover portion 71 and the second cover portion 81 further improve the heat resistance near the cross direction side fold 72 and near the axial side fold 82 by the reinforcing portions 77 and 86. Can.

  Further, in the embodiment, the reinforcing portions 77 and 86 can be disposed so as to be folded on the first cover forming portion 91 of the reinforcing sheet material 90 and the main body portions 91 a and 92 a of the second cover forming portion 92. The stacking reinforcing portions 91b and 92b are disposed continuously from the main body portions 91a and 92a, so that they can be easily handled and the reinforcing portions 77 and 86 can be easily disposed.

  Of course, depending on the output of the inflator 20, one of the reinforcing portions 77 and 86 may be saved, or both may be omitted. For example, as in the reinforcing sheet material 90A shown in FIG. 16, the first cover constituting portion 91A and the second cover constituting portion 92A may be configured without providing the laminating reinforcing portions 91b and 92b. Conversely, in the case of further reinforcing, the additional layer reinforcing portions 91b and 92b are extended from the main body portions 91a and 92a, or from the layer reinforcing portions 91b and 92b extended from the main body portions 91a and 92a. You may extend further.

  Of course, the reinforcing portions 77 and 86 may be separately sewn and disposed corresponding to the number of reinforcing layers to be provided.

  In the embodiment, the guide cloth 94 is provided on the inner peripheral side of the insertion portion 70d of the reinforcing sheet 70, and the distal end 20a of the inflator 20 can be easily inserted into the insertion portion 70d while gripping the grip portion 94a. Is configured as. Of course, if this point is not taken into consideration, the guide cloth 94 may not be provided.

  In the embodiment, the connection port 33 of the air bag 30 is formed by using the connection port fabric 52 (52O, 52I) to be sewn to the bag weave portion 47, but FIG. As shown in 18, a reinforcing sheet assembly in which a reinforcing sheet 70B is provided on an inner tube 63B as a flow straightening sheet at a connection port 33B of an air bag main body 31B formed by bag weaving with a polyamide yarn or the like of the air bag 30B. You may arrange 97B. The connection port 33B includes a main body side cylindrical portion 34B extending upward from the main body expansion portion 37B of the airbag 30, and an insertion side cylindrical portion 35B bent backward from the main body side cylindrical portion 34B. An opening 35c for inserting the inflator 20 is provided at the rear end of 35B. The main body side cylindrical portion 34B of the connection port portion 33B is in communication with the supply path portion 38 on the upper side of the main body expansion portion 37B. Of course, the supply passage 38 and the connection port 33B are formed so as to be integrated by means of a sack weave without being stitched.

  The inner tube 63B is formed of a woven fabric such as polyamide yarn as in the case of the inner tube 63 shown in A to C of FIG. 12 as shown in A and B of FIGS. 17 and 21 to A and B of FIG. A fold line 68a is provided at a portion on the lower edge 63c side of the outlet portion 65B of the inner tube 63B, and the folded tube sheet material 68B is folded in half and overlapped with the inboard portion 63a and the outboard portion 63b. Suture portions 66a, 66b and 66c are provided on a predetermined outer peripheral edge. The suture portion 66a is a portion obtained by suturing the front upper edge connected to the insertion port 64a of the connection cylindrical portion 64 to which the inflator 20 of the inner tube 63B is connected and the outflow port 65a on the front side. The sutured portion 66c is a portion obtained by suturing the inner peripheral edge connected to the rear side outlet 65b, and the sutured portion 66c is an L-shaped portion branched from the sutured portion 66b. The stitching portion 66c is co-stitched with the reinforcing sheet 70B, and the stitching portion 66b is partially sewn with the reinforcing sheet 70B.

  The inner tube 63B is provided at the lower edge 81d of the opening 81c of the second cover portion 81B in the reinforcing sheet 70B so as to prevent flapping between the inboard portion 63a and the outboard portion 63b of the outlet portion 65B. , And the suture portion 81f. The lower edge 81d of the inner side 63a and the outer side 63b of the inner tube 63B before the tube sheet member 68B of the inner tube 63B is folded so that the sutured portion 81f is not exposed to the inner peripheral side of the connection port 33B. And sewn from the seam 81g (see FIGS. 18 and 21B).

  In the reinforcing sheet 70B, as shown in FIGS. 17 and 19A to 20C, the first cover constituting portion 91B constituting the first cover portion 71B and the second cover constituting portion 92B constituting the second cover portion 81B are separated. Is configured. Of course, also in this reinforcing sheet 70B, the axial direction of the inflator 20 is on the front edge 70a side of the reinforcing sheet 70B in the direction in which the first cover portion 71B is separated from the tip 20a of the inflator 20 along the axial direction ID of the inflator 20. An inboard portion 73 as a front side and an outboard portion as a back side disposed on both sides of the cross direction fold 72 by providing a cross direction side fold 72 in a direction crossing the ID and being folded in half The tip end side 20a of the inflator 20 is disposed at both ends away from the fold point 72 and 74. The first cover portion 71B covers the periphery of the gas discharge portion 22 of the inflator 20 from the cylindrical wrap portion 71a wound around the tip outer peripheral surface 21b side of the main body portion 21 of the inflator 20 and the cylindrical wrap portion 71a And a gas flow passage portion 71b at a portion up to the side fold 72. The second cover portion 81B has an axial side fold 82 along the axial direction ID of the inflator 20 on the separation edge side away from the main body expansion portion 37B of the airbag body 31B, in the embodiment, on the upper edge 70b side of the reinforcing sheet 70B. It is provided and folded in two, and is disposed so as to wrap the tip side 20a of the inflator 20 by the inboard portion 83 as the front side extending from the axial side fold 82 and the outboard portion 84 as the back side. There is. The second cover portion 81B covers the periphery of the gas discharge portion 22 of the inflator 20 from the cylindrical wrap portion 81a which is wound around the tip outer peripheral surface 21b of the main body portion 21 of the inflator 20 and the cylindrical wrap portion 81a. And a gas flow passage portion 81b of a portion directed to the front edge 70a side of 70B.

  The first cover portion 71B and the second cover portion 81B, like the reinforcing sheet 70, at the distal end of the inflator 20, at a location apart from the gas discharge portion 22, the cross direction side fold 72 and the axial direction side fold In order to connect with 82, while being arranged in piles, the opening parts 71c and 81c which open the outflow port part 65B side of the inner tube 63B are provided and arranged. Furthermore, a second cover portion 81B is disposed inside the first cover portion 71B.

  Of course, even in this reinforcing sheet 70B, the portion where the cross direction side fold line 72 and the axial direction side fold line 82 cover the inner peripheral side of the suture portion 66a on the upper front edge side of the inner tube 63B, The expansion gas G discharged from the gas discharge portion 22 is disposed so as to improve the heat resistance of the inner tube 63B without directly contacting the stitched portion 66a.

  Also in this first cover portion 71B, as shown in B of FIG. 22, the inclination angle θ is such that the cross direction side fold 72 is expanded from the axial orthogonal direction VD of the inflator 20 toward the opening 71c. (In the embodiment, about 45 °) is provided and disposed to be inclined.

  Furthermore, also in the first cover portion 71B, the reinforcing portion 77 for enhancing the heat resistance is disposed on the inner peripheral side of the gas flow path portion 71b including the portion of the cross direction side fold 72, and even in the second cover portion 81, A reinforcing portion 86 that enhances heat resistance is disposed on the outer peripheral side of the gas flow passage portion 81 b including the portion of the axial side fold 82.

  First, as shown in A and B of FIG. 19, the guide cloth 94 is disposed at a predetermined position on the inner peripheral side of the main portion 92a of the second cover configuration portion 92B. Further, a fold 92c is provided, and the lamination reinforcing portion 92b is folded on the side opposite to the arrangement side of the guide cloth 94 in the main body portion 92a (the outer peripheral side of the main body portion 92a), as shown in FIG. As such, suture 95 is used to suture suture 92d. Then, as shown by the two-dot chain line in A of FIG. 21, lower edges 81 d and 81 d that become the end edges of the flow path side component 92 ab are sewn at 81 g at predetermined positions of the tube sheet 68 B before being folded in two. With the suture facing outwards, suture 95 is used to form a suture portion 81 f.

  Next, as shown in B of FIG. 21 (see C of FIG. 19), the second cover constituting portion 92B is provided with an axial fold 82 to fold the second cover constituting portion 92 together with the guide cloth 94. , The tube sheet material 68B is folded in half with a fold 68a. At this time, the outer shape (folded shape) of the second cover portion 81B and the inner tube 63B is formed.

  At the same time, as shown in FIGS. 20A and 20B, the connecting portion 91c between the main body portion 91a and the laminating reinforcing portion 91b in the first cover configuration portion 91B is creased to place the laminating reinforcing portion 91b on the main body portion 91a. Then, the seaming portion 91d is provided so that the stacking reinforcing portion 91b is not shifted, and both are seamed. Then, as shown in C of FIG. 20, if the inboard portion 73 of the first cover configuration portion 91B is placed on the outboard portion 74 with the cross direction side fold line 72, the first cover portion 71B An outer shape (folded shape) is formed.

  Then, as shown in A and B of FIG. 22, the first cover portion 71B is put in a predetermined position on the inner side of the inner tube 63B which is sewing the second cover portion 81B from the opened upper front edge side, If the inner tube 63B is provided with the suture sections 66a, 66b, 66c, the reinforcing sheet assembly 97B can be formed. The sutured portion 66a at the upper front edge of the inner tube 63B extends from the cross direction fold line 72 of the first cover portion 71B as an arrangement position spaced upward from the axial direction fold line 82 of the second cover portion 81B. The upper edge suture portion 76 is formed by overlapping and sewing together (see FIG. 22A). Further, as described above, the sewn portion 66c is co-stitched with the reinforcing sheet 70B, and a part of the sewn portion 66b is co-stitched with the reinforcing sheet 70B.

  The reinforcing sheet assembly 97B thus formed is inserted from the opening 35c of the connection port 33B, and the outlet portion 65B of the inner tube 63B and the connection port of the air bag main body 31B together with the release portion 70f of the reinforcing sheet 70B. The connection cylinder portion 64 of the inner tube 63B is disposed along the insertion port 70d of the reinforcing sheet 70B with the connection port portion 33B of the airbag main body 31B, along with the insertion portion 70d of the reinforcing sheet 70B. The air bag 30B can be formed by being disposed in the insertion side cylindrical portion 35B, and may be mounted on the vehicle V in the same manner as the air bag 30 described above.

  Then, in the reinforcing sheet assembly 97B in which the reinforcing sheet 70 is assembled to the inner tube 63B having the configuration as illustrated, the inner tube 63B and the reinforcing sheet 70B can be easily inserted in the connection port 33B woven with a bag. It can be arranged. Of course, such a reinforcing sheet assembly 97B can be used also for the connection port 33 to be sewn.

  Then, as shown in the example of the figure, as the reinforcing sheet 70B, the second cover portion 81B and the first cover portion 71B may be separately assembled to the inner tube 63B to form the reinforcing sheet 70B.

  Furthermore, as in the illustrated example, even if the lower edge 81d side of the opening 81c of the second cover portion 81B extends long downward so as to enter the region of the supply passage portion 38, the lower edge 81d The side is sutured to the inner tube 63B by the suture portion 81f, and does not flutter or shift in the inner tube 63B. Therefore, the inner tube 63B can smoothly exhibit a rectifying function of branching out from the outlets 65a and 65b on the front and rear sides of the outlet portion 65B and causing the expansion gas G to flow out. Furthermore, the seamed portion 81f on the lower edge 81d side is seamed so that the seam margin 81g side is inverted and brought into direct contact with the inboard portion 63a and the outboard portion 63b of the inner tube 63B. Is covered with the inboard portion 83 and the outboard portion 84 with respect to the inner peripheral side of the flowing second cover portion 81B and is not exposed to the inflation gas G and has heat resistance (see FIG. 18). ). Therefore, the second cover portion 81B can smoothly flow the inflation gas G from the opening 81c on the lower edge 81d side, which does not shift, to the outlet 65B side of the inner tube 63B.

  In addition, as an air bag used for the head protection air bag device, it may be configured as shown in FIG.

  Like the airbag 30 shown in FIGS. 2 to 6, in the airbag 30C, as shown in FIGS. 23 to 28, the airbag main body 31C includes a plurality of attachment portions 60, a bag weave portion 47, and a connection port portion. A cloth material 52 is composed. However, the major differences are as follows.

  That is, as shown in FIGS. 25 and 26, the first cover portion 71C and the second cover portion 81C of the reinforcing sheet 70C face the tip outer circumferential surface 21b of the inflator 20 separately to improve heat resistance. On the surface exposed to the expansion gas G, a coating layer CL made of a silicone resin or the like for enhancing the heat resistance is disposed.

  Further, the second cover portion 81C is disposed inside the first cover portion 71C, and is sewn to the first cover portion 71C so as not to be scooped by the inflation gas G. Specifically, as shown in FIGS. 25, 26, 30 and 32, the second cover portion 81 </ b> C has a front edge 81 h separated from the tip of the inflator 20 along the axial direction ID of the inflator 20 in the second cover portion 81 </ b> C. The side is sutured to the first cover 71C by the sutures 78 and 79 with the suture thread 95.

  Furthermore, as shown in FIGS. 26, 29 and 37, the reinforcing sheet 70C does not have the guide cloth 94 provided on the reinforcing sheet 70, and the second cover portion 81C on the inner peripheral side , And has a tongue portion 88 (88I, 88O) that protrudes and folds back the tip 88a. The tongue portions 88 (88I, 88O) are provided on the first cover 71C arranged around the second cover 81C, the inner tube 63C as a straightening sheet, and the connection opening cloth 52 It is welded to a portion of the second cover portion 81C which penetrates the through hole 87 and contacts the outer peripheral surface 21b of the inflator 20. That is, with the welded portions 89, the tongue portions 88I and 88O are folded back from the inner peripheral surface side of the reinforcing sheet 70C to the outer peripheral surface side of the connection port 33C, and the first cover portion 71C and the straightening sheet The end surface of the inner tube 63 </ b> C as the second embodiment and the opening 35 c (insertion openings 64 a and 70 e) in the connection opening cloth 52 is covered.

  Furthermore, as shown in FIGS. 23 and 24, the inner tube 63C as the straightening sheet has the fold 68a side corresponding to the air bag main body 31C in addition to the front and rear outlets 65a, 65b at the outlet 65C. An intermediate outlet 65 c is provided at a portion between the front and rear outlets 65 a and 65 b on the lower edge 63 c side, which becomes the above.

  The air bag body 31C is provided with an opening 38a on the lower edge side of the supply passage portion 38, through which the inflation gas G flowing out of the intermediate outlet 65c passes. The main inflating portion 37C of the air bag main body 31C has the pressure adjusting chamber 39b in which the front inflating portion 39 on the front side of the rear inflating portion 40 communicates with the opening 38a and the main chamber 39a in front of the pressure adjusting chamber 39b. It is configured to be equipped. In the airbag main body 31C, the front side inflating portion 39 can suppress the excessive pressure increase of the main chamber 39a at the initial stage of the expansion by causing the inflation gas G to flow into the pressure control chamber 39b.

  Furthermore, as shown in FIGS. 25 to 28 and 33, the inner tube 63C is made to suture the cloth 69 on the inner circumferential side to improve heat resistance and to suppress damage due to stress concentration at the time of expansion. Is configured. That is, the patch 69 is sewn on the inner peripheral surface side of the inner tube 63C in the tube sheet material 68C forming the inner tube 63C by the suture portions 69a, 69b, 69c using the suture thread 95. The suture portion 69c is a suture site on the periphery of the intermediate outlet 65c, and the outer periphery of the tube sheet 68C folded in half at a fold line 68a so that the suture portions 69a and 69b disperse stress concentration. It arrange | positions along the mutual suture part 66b. That is, the suture portion 66b is a suture site of the bending portion 67 which bends in a substantially L shape from the outlet port 65C of the inner tube 63C to the connection cylindrical portion 64 (see FIG. 35). , In the vicinity of the bending portion 67 away from the suture portion 66b of the bending portion 67, along the bending portion 67, the inboard portion 63a and the outboard side which are the portions on both sides of the folded fold 68a in the tube sheet 68C. A patch 69 is sewn to the portion 63b.

  In the airbag 30C, as shown in FIG. 28, the first cover component 91C forming the connection opening cloth 52, the tube sheet 68C, the backing cloth 69, and the first cover 71C as constituent members, The second cover component 92C forming the second cover portion 81C is made of a flexible sheet material, for example, a cloth material obtained by plain-weaving a yarn of polyamide or the like with heat resistance such as silicone resin. A coating layer CL coated with an enhancing coating agent is provided, and the surface on the coating layer CL side is disposed so as to be exposed to the expansion gas G or approach the expansion gas G side. In addition, the cloth material 52 for connection opening part, the sheet material 68C for tubes, the backing cloth 69, the first cover component 91C forming the first cover 71C, and the second cover component forming the second cover 81C. At 92 C, positioning holes (not shown) for positioning at the time of stitching are opened at the periphery.

  In this airbag 30C, capital letters C are appropriately attached to parts / members greatly different from the airbag 30, and reference numerals attached to the airbag 30 are attached to parts / members similar to or similar to the airbag 30. The description will be omitted as appropriate.

  The manufacture of the airbag 30C will be described. First, the manufacturing process of the reinforcing sheet 70C will be described. As shown in A and B of FIG. 29, folds 92c are provided, and the reinforcing part 92b for lamination is provided on the outer peripheral side of the main part 92a Are folded, and a suture thread 92 made of polyamide or the like is used to form a suture portion 92 d to form a reinforcement portion 86.

  After that, as shown in A and B of FIG. 30, the second cover component 92C is disposed on the inner peripheral side of the first cover component 91C, and the stitching portion 78 is provided to stitch the first cover component 91C. Do. The seaming portion 78 is formed in a substantially rectangular ring shape so as to stitch together the inboard portions 73 and 83 of the first cover portion 71C and the second cover portion 81C, and as much as possible, the front of the second cover portion 81C. It is disposed so as to extend from the vicinity of the axial side fold 82 on the edge 81 h side to the lower edge 81 d side. However, since the first cover portion 71C and the vehicle outer side portions 74 and 84 of the second cover portion 81C are also sewn by the stitching portion 79 (see FIG. 32), the thickness dimension of the reinforcing sheet 70C is reduced. The suture portion 78 is disposed in the area of the upper half of the gas flow passage portion 81 b in the vicinity of the axial fold 82 so as not to overlap with the suture portion 79.

  Thereafter, as shown in B of FIG. 30 and A of FIG. 31, the second cover component 92 C is folded in two to form a second cover portion 81 C, with the axial side fold 82 added, and further, as shown in FIG. As shown in A and B of 31, with the cross direction side crease 72 added, the first cover component 91 C is folded in two, and the second cover portion 81 C is disposed inside, the first cover portion Form 71C.

  In addition, the cross direction side fold 72 of the first cover portion 71C is provided with an inclination angle θ (about 60 ° in the illustrated example) so as to expand from the orthogonal direction VD of the inflator 20 toward the opening 71c. Are arranged to be inclined (see FIG. 32).

  Furthermore, as shown in B of FIG. 31 and A of FIG. 32, the first cover portion 71C and the second cover portion 81C are covered by the inboard portions 73 and 83 of the first cover portion 71C and the second cover portion 81C. The vehicle outer side portions 74 and 84 are sewn together by the suture portion 79. The suture portion 79 is formed in a substantially rectangular ring shape, and is disposed on the lower edge 81 d side as far as the front edge 81 h side of the second cover portion 81 C so as not to overlap the suture portion 78 in the vehicle interior and exterior direction There is. And as shown to B of FIG. 32, the shift | offset | difference of the 1st cover part 71C and the 2nd cover part 81C is prevented, and also the shift | offset | difference of the vehicle inner side 73 of the 1st cover part 71 and the vehicle outer side 74 is By using the suture thread 95 to prevent the sutures 75 and 85, the reinforcing sheet 70C is formed. And also in this reinforcing sheet 70C, the cross direction side fold line 72 and the axial direction side fold line 82 are arranged in an overlapping manner so as to be continuous with each other.

  In the embodiment, the stitching portions 75 and 85 are formed by co-sewing the inboard portions 73 and 83 and the outboard portions 74 and 84 of the first cover portion 71C and the second cover portion 81C, The same suture site but with different reference numerals.

  The reinforcing sheet 70C formed in this manner is, as shown in FIG. 32B, a cylindrical insertion portion 70d in which an insertion port 70e is provided on the rear end side, with the tip end 20a of the inflator 20 facing forward. And the discharge | release part 70f which arrange | positioned the discharge port 70g which makes the gas G for expansion flow out is formed in the lower edge side by the side of the front edge 70a (refer FIGS. 24-26). The release portion 70f receives the inflation gas G discharged from the gas discharge port 22a of the gas discharge portion 22 of the inflator 20, and the discharge port 70g, in other words, the first cover portion 71C and the second cover portion 81C. It will be discharged from the openings 71c and 81c. Further, similarly to the reinforcing sheet 70, the portion of the discharge portion 70f is configured by the gas flow path portions 71b and 81b of the first cover portion 71C and the second cover portion 81C.

  As shown in FIGS. 34 and 35, the reinforcing sheet 70C formed in this manner is placed on the tube sheet material 68C before folding, folded at the fold line 68a, and overlapping the inboard portion 63a and the outboard portion 63b. The outer peripheries of the predetermined outer peripheries other than the insertion opening 64a and the outflow openings 65a and 65b are sewn using the suture thread 95. That is, a suture portion 66a on the outer peripheral edge between the outlet 65a on the front edge side of the inner tube 63C and the insertion opening 64a, and a suture portion 66b on the outer peripheral edge between the insertion port 64a on the rear edge side and the outlet 65b Once formed, the inner tube 63C is formed. The suture portion 66b is bent in a substantially L shape disposed at a rear edge 64b on the insertion port 64a side of the connection cylindrical portion 64 and an upper edge 65d on the rear side of the connection cylindrical portion 64 of the outflow portion 65C. As a suture site of the bending portion 67.

  In the case of the air bag 30C, the stitched portion 66a is not stitched together with the reinforcing sheet 70C, but the stitched portion 66b is partially stitched together with the reinforcing sheet 70C. Therefore, while the shape of the inner tube 63C is formed by the stitching portions 66a and 66b, the reinforcing sheet 70C is also fastened to the inner tube 63C by the stitching portion 66b, and the inner tube 63C provided with the reinforcing sheet 70C, in other words , And the reinforcing sheet assembly 97C is formed.

  Further, as shown in A and B of FIG. 33, a backing cloth 69 is sewn on the inner peripheral side of the tube sheet material 68C before being folded in half at the fold line 68a. The patch 69 is disposed on the front side of the connection cylindrical portion 64 of the inner tube 63C, and at the central portion excluding the peripheral edge of the outlets 65a and 65b in the outlet portion 65C. Then, the patch cloth 69 is sutured to the inner peripheral side of the tube sheet material 68C by the suture portions 69a, 69b, 69c by the suture thread 95.

  As shown in FIGS. 27 and 35, the suture portion 69a is on the inner peripheral surface side of the inner tube 63C separated from the suture portion 66b in the vicinity of the suture portion 66b of the bent portion 67 of the inner tube 63C. It is a site | part which sutures the patch 69 at the vehicle inner side 63a of the inner tube 63C so that it may be followed. The suture portion 69b is on the inner circumferential surface side of the inner tube 63C separated from the suture portion 66b in the vicinity of the suture portion 66b of the bent portion 67 of the inner tube 63C, and along the suture portion 66b, a car of the inner tube 63C. It is a site | part which sutures the patch 69 to the outer side part 63b. The end portions (upper ends) 69at and 69bt of the sewn portions 69a and 69b, which are separated from each other, linearly extend so as to be orthogonal to the fold 68a, as shown in FIG.

  The suture portion 69c is a portion at which the patch 69 is sutured to the tube sheet material 68C at the periphery of the intermediate outlet 65c.

  Thereafter, when the reinforcing sheet assembly 97C provided with the reinforcing sheet 70C on the inner tube 63C is assembled to the air bag main body 31C, in the air bag main body 31C, A and B in FIG. As shown in FIG. 5, the connection stitch portion using the suture thread 95 in advance with the connection opening cloths 52I and 52O for the inner wall portion 32a and the outer wall portion 32b of the divided portion 50 of the woven and woven portion 47. Provide 57 and sew. Next, as shown in A and B of FIG. 37, a reinforcing sheet assembly 97C is disposed between the open connection opening cloths 52I and 52O. Then, the front edge side suture portion 55a and the rear edge side suture portion 55b of the bag forming suture portion 55 using the suture thread 95 are provided, and the connection opening cloths 52I and 52O, the reinforcing sheet 70C, and the inner tube 63C. , And the connection port 33C can be formed, and the reinforcing sheet assembly 97C provided with the reinforcing sheet 70C on the inner tube 63C can be disposed and fixed in the connection port 33C. The portions to be stitched together with the connection opening cloths 52I and 52O by the front edge side suture portion 55a are the upper front edge of the inner tube 63C and the upper edge 70b at the upper side of the axial fold 82 in the reinforcing sheet 70C. (See FIG. 24). The portions to be stitched together with the connection opening portion cloth materials 52I and 52O by the rear edge side suture portion 55b are disposed on the rear side of the suture portions 75 and 85 of the reinforcing sheet 70C, and the inner tube 63C and the reinforcing sheet 70C This is a portion on the lower edge side of the insertion side tubular portion 35. In other words, the leading edge side suture portion 55a does not sew the cross-directional fold 72 or the axial fold 82.

  In the connection port 33C, the tip 88a side of the tongue portion 88 (88I, 88O) protruding from the insertion port 70e of the reinforcing sheet 70C in the vehicle inside-outward direction is folded back to surround the second cover 81C. Of the second cover portion 81C that contacts the outer peripheral surface 21b of the inflator 20 through the through holes 87 provided in the first cover portion 71C, the inner tube 63C, and the connection opening cloth material 52 disposed in the It welds to a part and it attaches to the outer peripheral surface side of the insertion side cylinder part 35C of the connection port 33C in the periphery of the opening 35c (refer FIG. 24, 26).

  Then, the attachment portion 60 is sewn to a predetermined portion, whereby the airbag 30C can be formed.

  Thereafter, the airbag 30C is folded so that the lower edge 31b side approaches the upper edge 31a side, and a tearable tape (not shown) for preventing breakage is wound, and the mounting bracket 13 (see FIG. 1) Through the insertion opening 70e into the insertion portion 70d of the reinforcing sheet 70C in the connection cylindrical portion 64 of the inner tube 63C from the opening 35c side of the insertion side cylindrical portion 35C of the connection port 33C. 20a is inserted, and the clamp 28 is fastened so that the clamp 28 is pressed from the outer peripheral side of the insertion side cylindrical portion 35 to the inflator 20 side, and the inflator 20 is connected to the insertion side cylindrical portion 35. It can be assembled.

  Then, as shown in FIG. 1, the air bag assembly 99 assembled in this manner arranges the mounting portions 60 assembled with the mounting bracket 13 at the corresponding mounting site of the inner panel 2 on the body 1 side, The mounting bolt 14 is fastened to the screw hole by inserting the mounting hole 60a or the like, and the mounting bracket 24 is further bolted to fix the inflator 20 to the inner panel 2, and the airbag assembly 99 is fixed. Attach to body 1 Next, a lead wire (not shown) extending from a predetermined control device for operating the inflator is connected to the inflator 20, the front pillar garnish 4 and the roof head lining 5 are attached to the body 1, and the intermediate pillar garnish 7 and the rear pillar garnish 8 are further attached. If attached to the body 1, the head protection airbag device S can be mounted on the vehicle V.

  By using such an airbag 30C, even with the airbag device S, the same operation and effect as the airbag device S using the airbag 30 can be obtained at the time of operation. Furthermore, the following operation and effects can be obtained by the configuration of the airbag 30C.

  That is, in the airbag 30C, as shown in FIGS. 24 to 26, the front edge 81h side away from the tip of the inflator 20 along the axial direction ID of the inflator 20 in the second cover portion 81C of the reinforcing sheet 70C The first cover portion 71C is sewn by 78 and 79.

Therefore, in the airbag 30C, it is possible to prevent the front edge 81h side of the second cover portion 81C from turning away from the first cover portion 71C. Then, it is possible to prevent the inflation gas G from entrapping the front edge 81 h of the second cover portion 81 C and entering between the outer peripheral side of the second cover portion 81 C and the inner peripheral side of the first cover portion 71 C. . Therefore, for example, the inflation gas G is located on the front side of the front edge 81 h of the second cover portion 81 C (that is, away from the tip of the inflator 20 along the axial direction ID of the inflator 20 in the second cover portion 81 C From the edge 81 h, it strikes at the location of the cross direction side fold 72 of the first cover portion 71C ( which is located in the direction separating away along the axial direction ID of the inflator 20) , and then the axial side fold 82 of the second cover portion 81C. As the front edge 81h of the second cover portion 81C is less likely to bend toward the side of the second cover portion 81C, it becomes difficult to enter the outer circumferential side of the axial side fold 82, and the axial direction fold 82 of the second cover portion 81C Even if there is a suture site (suture portion) 55a for stitching the first cover portion 71C, the inner tube 63C, etc. on the outer peripheral side, the inflation gas G in the suture portion 55a is present. That damage can be prevented.

  In addition, the structure which stitch | sutures the 1st cover part 71C over the front edge 81h side of the 2nd cover part 81C up and down so that the 2nd cover part 81C may be prevented is applied to the reinforcement sheet 70 shown in FIG. May be

  Further, in the airbag 30C, as shown in FIGS. 25 and 26, the side approaching the outer peripheral surface 21b of at least one of the first cover portion 71C and the second cover portion 81C (in the illustrated example, The second cover portion 81C side is configured by arranging a heat-resistant coating layer CL on the inner side surface in contact with the inflator 20.

  Therefore, in such a configuration, the heat resistance of the reinforcing sheet 70C can be improved.

  In particular, in the airbag 30C, the first cover portion 71C and the second cover portion 81C both have heat resistance on the surfaces facing the outer peripheral surface 21b of the inflator 20 and exposed to the inflation gas G. Since the coating layer CL thus formed is disposed, the heat resistance of the reinforcing sheet 70C can be further improved.

  In the airbag 30C, the first cover portion 71C and the second cover portion 81C are configured of the separate first cover component 91C and the second cover component 92C, so that the outer periphery of the inflator 20 can be easily obtained. The coating layer CL side of the first cover portion 71C and the second cover portion 81C can be disposed on the surface side facing the surface 21b and exposed to the expansion gas G.

  Incidentally, in the reinforcing sheet 70 formed of the single sheet of reinforcing sheet material 90, as shown in FIGS. 8 to 10, the inner peripheral surface side of the first cover portion 71 and the second cover portion 81 is the sheet material 90. The front and back sides of the reinforcing sheet material 90 are arranged so that the coating layer CL is disposed on the inner peripheral surface side of the second cover portion 81 close to the inflator 20, as different It may be provided on the coating layer CL.

  Also, in the second cover 81B and the first cover 71B shown in FIGS. 19 and 20, the inner tube 63B (the same applies to the inner tube 63 in FIG. 3) is also included in the surface exposed to the inflation gas G. It is desirable to provide a heat-resistant coating layer.

  In the airbag 30C, the side closer to the outer peripheral surface 21b of the inflator 20 in the first cover portion 71C and the second cover portion 81C is configured by disposing the coating layer CL having heat resistance. Even if the first cover 71C and the second cover 81C are close to the outer peripheral surface 21b of the inflator 20, in the case of the illustrated example, the second cover 81C is configured as follows. It is done. That is, on the side of the second cover portion 81C, on the opening 35c side where the inflator 20 of the connection port 33C is inserted, a tongue portion 88 (88I, 88O) is provided so as to face the inflator 20 therebetween. The tips 88a of the two opposite tongues 88I and 88O are folded back to the outer surface side of the connection port 33C as shown in FIG. 26, and attached to the outer surface side of the connection port 33C using the weld 89 ing.

  Therefore, in the airbag 30C, the heat-resistant coating layer CL is generally made of a coating agent such as silicone resin, so that it is difficult to slip, and the inflator 20 is difficult to insert. However, if the end face side of the opening 35c of the connection port 33C is covered with the tongue portion 88 (88I, 88O) folded back from the inner circumferential surface side to the outer circumferential surface side, the tongue portion 88I, 88O is held and the inflator is held. 20 can be pushed into the inner peripheral side of the reinforcing sheet 70C of the connection port 33C, and the insertion work of the inflator 20 into the connection port 33C can be easily performed. Further, since the end face sides of the reinforcing sheet 70C and the connection port 33C of the air bag main body 31C are covered by the tongue portions 88I and 88O, the outer peripheral surface side of the reinforcing sheet 70C and the connection port 33C of the air bag main body 31C It is also possible to eliminate the erroneous assembly which inserts the inflator 20 between the peripheral surface side.

  Further, in the air bag 30C, the middle tube outlet 63C can flow out the inflation gas G to the fold 68a side (lower edge 63c side) between the outlets 65a and 65b on both sides of the outlet portion 65C. It has 65c.

  Therefore, the inner tube 63C is configured by providing the middle outlet 65c at the outlet 65C in addition to the outlets 65a and 65b on both sides, and the outlet from each outlet 65a, 65b, 65c of the inner tube 63C. The flow rate of the inflation gas G to be caused can be set variously in accordance with the plurality of inflation portions 39a, 39b, 40 provided in the airbag main body 31C, and the performance of the airbag 30C can be improved. Incidentally, in the airbag main body 31C, the front side inflating portion 39 can suppress the excessive pressure rise of the main chamber 39a at the initial stage of the expansion by causing the inflation gas G to flow into the pressure control chamber 39b. When the occupant's head is disposed in the vicinity of the upper portion, the pressure on the head can be suppressed.

  Furthermore, in the airbag 30C, the inner tube 63C is formed by folding the tube sheet material 68C in half at the fold line 68a and stitching the stacked outer peripheral edges with the stitching sections 66a and 66b. . Further, a bending portion 67 that bends in a substantially L shape from the outflow port 65C toward the connection cylindrical portion 64 is disposed at the site of the stitching portion 66b. In the airbag 30C, a flexible patch cloth 69 is disposed on the inner peripheral side at least in the vicinity of the bent portion 67 of the inner tube 63C. The patch 69 is disposed near the inward portion 63a and the outboard portion 63b, which are portions on both sides of the fold 68a of the inner tube 63C, in the vicinity of the inflected portion 67 apart from the sutured portion 66b of the inflected portion 67. Are respectively sewn along the bending portion 67 and integrated with the inner tube 63C, and the end edges 69d and 69e are overlapped with each other at the stitching portion 66b of the bending portion 67 and are sutured together with the inner tube 63C. There is.

  Therefore, when the inner tube 63C inflates the outlet portion 65C side from the connection cylindrical portion 64 on the inner peripheral side of the airbag main body 31C and on the outer peripheral side of the reinforcing sheet 70C, the tension by the pressure of the expansion gas G The stress T concentrates on the suture portion 66 b near the bending portion 67 by the force T. However, as shown in FIGS. 24 and 27, in the inner tube 63C, the sutured portion 66b of the bent portion 67 is reinforced by stitching the patch 69. That is, the inboard portion 63a and the outboard portion 63b on both sides of the fold 68a in the inner tube 63C are applied with the stitching portions 69a and 69b in front of the stitching portion 66b of the bending portion 67, respectively. The sutures 69 are integrated and reinforced so as to increase the thickness. Therefore, the sutured portion 66b in the vicinity of the bent portion 67 of the inner tube 63C is unlikely to be damaged by the pressure of the expansion gas G, and smoothly discharges the expansion gas from the outlet 65a, 65b, 65c without breakage. It can be done.

  In the illustrated example, the suture portions 69a and 69b are L-shaped on the rear edge side with a large curvature (J-shape (J) in the suture portions 66a and 66b of the outer peripheral edge of the inner tube 63C from the connecting cylinder 64 to the outlet 65C If it is easy to cause damage at the time of expansion, the side of the suture part 66a on the front side is also disposed near the suture part 66b. A suture site may be provided.

  Incidentally, in the case of the illustrated example, as shown in FIGS. 33 and 35, although the sutured part 66a side is separated from the sutured part 66b, the curvature is smaller than the sutured part 66b side, and further, by the sutured parts 69a and 69b. By integrating the backing cloth 69 into the sheet material 68C, the area around the suture portion 66a is also integrated so as to increase the thickness, and it is configured so as not to be easily damaged by expansion. In particular, in the case of the illustrated example, the sutures 69a and 69b have the end of the sheet 68C away from the fold line 68a, that is, the ends 69at and 69bt extending to the upper edge 64c side of the connecting cylinder 64. There is. Therefore, the seamed portion 66a side is reinforced by integration of the patch 69 on the sheet material 68C at the portion of the peripheral wall of the connection cylindrical portion 64 by the end portions 69at and 69bt, and the end portions 69at and 69bt Also by the suture site, the suture portion 66a is prevented from being damaged during expansion.

  Therefore, in the case where the patch cloth 69 is sewn and integrated with the sheet material 68C (inner tube 63C) so as to increase the thickness of the sheet material 68C (inner tube 63C), at least the front and rear sutures 66a, 66b. Between the outer peripheral edge of the connecting cylindrical portion 64 of the inner tube 63C, and stitching the patch 69 to the sheet 68C until the area exceeding the large bending portion 67 of the outlet 65C. It is good to do.

  Furthermore, if there is a sutured portion 66b having a bent portion with a curvature larger than that of the sutured portion 66a, the curvature of the intersection portion of the outer peripheral edge of the connecting cylindrical portion 64 and the outflow portion 65C as shown in the example. And the lower end 69ab of the end side is extended substantially linearly from the outer peripheral edge (upper edge 64c side) of the connection cylindrical portion 64 of the inner tube 63C to the lower bent side 67 side of the inner tube 63C. The 69bb side is bent along the bent portion 67 and along the rear upper edge 65d which is a stitched portion of the outer peripheral edge of the outlet 65C, the suture portions 69a and 69b are applied and the edge of the cloth 69 in the front-rear direction It is desirable to provide up to 69 g (rear edge).

  The end portions 69at and 69bt of the suture portions 69a and 69b may be extended to the upper edge 64c side of the connection cylindrical portion 64 as in the example shown in the figure, and even if the upper edge 64 of the connection cylindrical portion 64 is not connected, It may be disposed so as to intersect the front edge side of the tubular portion 64, that is, the suture portion 66a.

  Further, in the case of the illustrated example, the pad cloth 69 is constituted by a single sheet connected on the inner peripheral side of the inner tube 63C as the flow straightening sheet, and the tube sheet 68C for tube which constitutes one inner tube 63C. On the other hand, it is only necessary to dispose one backing cloth 69, and handling and management of the backing cloth 69 become easy.

  If this point is not taken into consideration, for the inner and outer side portions 63a and 63b on the front side of the sutured portion 66b of the bending portion 67, two sheets stitched from the vicinity of the respective sutured portions 69a and 69b to the sutured portion 66b A patch may be configured.

  In the embodiment, in the airbags 30, 30B, and 30C, the inner tubes (rectifying sheets) 63, 63B, and 63C are provided. However, as the airbag having a configuration in which the inner tubes are not provided, the insertion side cylindrical portion The configuration may be such that the reinforcing sheets 70, 70B, 70C are simply disposed in the connection ports 33, 33B, 33C provided with 35, 35B, 35C and the main body side cylindrical portions 34, 34B, 34C. Even in this case, the reinforcing sheets 70, 70B, 70C can improve the heat resistance of the front edge 34a and the upper edge 35a of the connection ports 33, 33B, 33C, and in particular, the front edge side suture portion 55a is disposed. In the case of the connection port 33, 33C, it is preferable.

  In the embodiment, the head protection airbag device S is exemplified, but the connection opening portion is L-shaped when mounted on a vehicle, as the air bag has a configuration in which the connection opening portion protrudes from the main body expansion portion. The present invention can be practiced as long as the reinforcing sheet is disposed in the inside by being bent, and the present invention is applied to, for example, a pedestrian protection air bag, not a curtain air bag. You may

  Further, the connection port of the air bag according to the present invention simply projects in a straight line from the main body expansion part and is bent in an L shape when mounted on a vehicle to form the main body side cylinder and the insertion side cylinder. It may be a configuration.

20: Inflator, 30, 30B, 30C: (curtain) Airbag 31, 31, 31B, 31C: Airbag body, 32a: (front side wall) car inner side wall, 32b: (back side wall) car outer side wall, 33 , 33B, 33C ... connection port, 34, 34B ... main body side cylindrical portion, 35, 35B ... insertion side cylindrical portion, 37, 37B, 37C ... main body expansion portion,
63, 63B, 63C ... (Rectification sheet) Inner tube, 64 ... Connection tube, 65, 65B, 65C ... Outflow port, 65a, 65b ... Outflow port, 65c ... Middle outflow port, 66b ... Sections 67: bent portion 68, 68B, 68C: sheet material for tube 68a: fold, 69: patch cloth 69a, 69b: sutured portion along the bent portion
70, 70B, 70C ... Reinforcing sheet, 70b ... Separated edge, 71, 71B, 71C ... 1st cover part, 71c ... Opening part, 72 ... Cross direction side fold, 75 ... (Joint stitching) Suture part, 76 ... ( Separating portion (for separating edge and upper edge), 77: reinforcement portion, 78, 79 ... (for the first cover portion and the second cover portion), stitching portion 81, 81B, 81C ... second cover portion, 81c ... opening portion , 81 h ... (from the tip of the inflator along the axial direction of the inflator) edge 82 ... axial side fold, 85 ... (co-stitching) stitching portion 86 ... reinforcement portion 88 ... tongue portion
90, 90A: Sheet material for reinforcement, 91, 91A, 91B: First cover component, 91C: First cover component, 91b: Reinforcement for lamination, 92, 92A, 92B: Second cover component, 92C ... Second cover component, 92b ... Reinforcement part for lamination, 93 ... Coupling part, CL ... Coating layer,
V: vehicle, ID: axial direction (of the inflator), G: inflation gas, S: head protection airbag device.

Claims (19)

The airbag includes: an air bag that inflates an inflation gas, and a substantially cylindrical inflator that supplies the inflation gas discharged from the tip side to the air bag.
The air bag includes an air bag body and a flexible reinforcing sheet disposed on an inner peripheral side of the air bag body.
The air bag main body inflates the inflating gas to inflate the front side wall portion and the back side wall portion apart, and the inflating gas from the inflator flows into the main body inflating portion. And a cylindrical connection port connected to the inflator;
The airbag device according to claim 1, wherein the reinforcing sheet is disposed on the inner peripheral side of the connection port so as to cover the outer periphery of the inflator.
The reinforcing sheet is
A cross direction side fold in a direction intersecting with the axial direction of the inflator is provided at a position separated from the tip end side of the inflator along the axial direction of the inflator, and is folded in half. A first cover portion disposed so as to wrap the tip end side of the inflator at both ends away from the cross direction side fold at the portion of
An axial fold along the axial direction of the inflator is provided on the separation edge side away from the main body expansion part and folded in half, and the tip side of the inflator is wrapped by the portions on both sides of the axial fold and distributed. A second cover portion to be provided;
As well as being configured with
The first cover portion and the second cover portion;
The cross-fold fold and the fold along the axial direction are arranged to be continuous with each other at a location away from the tip of the inflator, and the main body inflation portion side of the airbag main body is Provided with an opening for opening , and
An airbag device characterized in that it is formed of a single reinforcing sheet material connected to each other .   The airbag apparatus according to claim 1, wherein the second cover portion of the reinforcing sheet is disposed inside the first cover portion.   The airbag device according to claim 2, wherein an edge side of the second cover portion which is apart from the tip of the inflator along the axial direction of the inflator is sewn with the first cover portion.   The first cover portion of the reinforcing sheet is disposed so as to incline at an angle at which the cross direction side fold extends from the direction perpendicular to the axis of the inflator toward the opening side. The airbag apparatus according to any one of claims 1 to 3, characterized in that:   The first cover portion of the reinforcing sheet is configured to sew separate edges away from the main body expansion portion continued from the cross direction side fold line. The airbag apparatus of 1 item.   The second cover portion of the reinforcing sheet is separated from the axial fold and is continuous with the opening, and the opening side edges of the connection opening into which the inflator is inserted are sewn together. The airbag apparatus according to any one of claims 1 to 5, characterized in that   The first cover portion and the second cover portion are separated from the axial-side fold and are continuous with the opening, and the opening side edges of the connection port into which the inflator is inserted are overlapped, The airbag apparatus according to any one of claims 1 to 6, which is sewn together. The air according to any one of claims 1 to 7 , wherein the first cover portion is configured to include a reinforcing portion having a plurality of layers in the vicinity of the cross direction side fold. Bag equipment. The air according to any one of claims 1 to 8 , wherein the second cover portion is configured to include a reinforcing portion having a plurality of layers in the vicinity of the axial side fold. Bag equipment. A heat-resistant coating layer is disposed on the inner side surface of the first cover portion and the second cover portion that is in close proximity to the outer peripheral surface of at least one of the inflators and in contact with the inflator. The airbag apparatus according to any one of claims 1 to 9 , which is configured. A heat-resistant coating layer is disposed on a surface where both the first cover portion and the second cover portion face the outer peripheral surface side of the inflator and are exposed to the inflation gas. The airbag apparatus according to any one of claims 1 to 9 , which is configured. The side of the first cover portion and the second cover portion approaching the outer peripheral surface of the inflator is the opening side of the connection port portion through which the inflator is inserted, and extends so as to face the inflator. Equipped with a tongue part,
11. The apparatus according to claim 11, wherein the two opposing tongues are disposed such that their tips are folded back to the outer surface side of the connection port and attached to the outer surface side of the connection port. Or the airbag apparatus of Claim 11 . The airbag includes: an air bag that inflates an inflation gas, and a substantially cylindrical inflator that supplies the inflation gas discharged from the tip side to the air bag.
The air bag includes an air bag body and a flexible reinforcing sheet disposed on an inner peripheral side of the air bag body.
The air bag main body inflates the inflating gas to inflate the front side wall portion and the back side wall portion apart, and the inflating gas from the inflator flows into the main body inflating portion. And a cylindrical connection port connected to the inflator;
The airbag device according to claim 1, wherein the reinforcing sheet is disposed on the inner peripheral side of the connection port so as to cover the outer periphery of the inflator.
The reinforcing sheet is
A cross direction side fold in a direction intersecting with the axial direction of the inflator is provided at a position separated from the tip end side of the inflator along the axial direction of the inflator, and is folded in half. A first cover portion disposed so as to wrap the tip end side of the inflator at both ends away from the cross direction side fold at the portion of
An axial fold along the axial direction of the inflator is provided on the separation edge side away from the main body expansion part and folded in half, and the tip side of the inflator is wrapped by the portions on both sides of the axial fold and distributed. A second cover portion to be provided;
As well as being configured with
The first cover portion and the second cover portion;
The cross-fold fold and the fold along the axial direction are arranged to be continuous with each other at a location away from the tip of the inflator, and the main body inflation portion side of the airbag main body is Provided with an opening for opening , and
The air bag is disposed inside the connection opening portion of the air bag main body and the main body expansion portion in the vicinity of the connection opening portion, and has flexibility provided with the reinforcing sheet on the inner peripheral side. Equipped with a straightening sheet
The rectifying sheet is
A connection tube portion disposed in the connection port portion and inserted into the distal end side of the inflator to be connected to the inflator;
The expansion gas from the inflator, which has flowed in from the connecting cylindrical portion and extends through the connecting cylindrical portion, is branched to both sides at least at two outlet ports which can flow out at the end side. An air bag device comprising: an outlet port portion having: The flow straightening sheet is formed of a sheet of flexible sheet material, and is provided with a fold on the side of the outlet and folded in half to stitch the overlapped outer peripheral edges to each other. The air bag device according to claim 13 , characterized in that: 15. The air bag according to claim 14 , wherein the straightening sheet comprises an intermediate outlet through which the expansion gas can flow out, between the outlets on both sides of the outlet portion. apparatus. The flow straightening sheet is configured by arranging a bending portion that bends in a substantially L shape from the outflow port toward the connection cylindrical portion at a stitched portion of the stacked outer peripheral edges.
A flexible patch is disposed on the inner peripheral side of at least the vicinity of the bent portion in the flow straightening sheet,
The patch cloth is sewn along the bending portion to the portions on both sides of the fold line in the straightening sheet, in the vicinity of the bending portion separated from the stitching portion of the bending portion. The device according to claim 14 or 15 , wherein it is integrated with the flow straightening sheet, and the end portions are overlapped with each other at the stitched portion of the bending portion, and stitched together with the flow straightening sheet. Air bag equipment. The airbag apparatus according to claim 16 , wherein the patch is formed of a single sheet connected on the inner circumferential side of the flow straightening sheet. The airbag includes: an air bag that inflates an inflation gas, and a substantially cylindrical inflator that supplies the inflation gas discharged from the tip side to the air bag.
The air bag includes an air bag body and a flexible reinforcing sheet disposed on an inner peripheral side of the air bag body.
The air bag main body inflates the inflating gas to inflate the front side wall portion and the back side wall portion apart, and the inflating gas from the inflator flows into the main body inflating portion. And a cylindrical connection port connected to the inflator;
The airbag device according to claim 1, wherein the reinforcing sheet is disposed on the inner peripheral side of the connection port so as to cover the outer periphery of the inflator.
The reinforcing sheet is
A cross direction side fold in a direction intersecting with the axial direction of the inflator is provided at a position separated from the tip end side of the inflator along the axial direction of the inflator, and is folded in half. A first cover portion disposed so as to wrap the tip end side of the inflator at both ends away from the cross direction side fold at the portion of
An axial fold along the axial direction of the inflator is provided on the separation edge side away from the main body expansion part and folded in half, and the tip side of the inflator is wrapped by the portions on both sides of the axial fold and distributed. A second cover portion to be provided;
As well as being configured with
The first cover portion and the second cover portion;
The cross-fold fold and the fold along the axial direction are arranged to be continuous with each other at a location away from the tip of the inflator, and the main body inflation portion side of the airbag main body is Provided with an opening to be opened ,
The second cover portion of the reinforcing sheet is disposed inside the first cover portion ;
The first cover portion of the reinforcing sheet has the cross direction side fold;
The inflator is disposed so as to be inclined by providing an angle expanding from the direction perpendicular to the axis of the inflator toward the opening.
The airbag apparatus is characterized in that the second cover portion is disposed in the direction away from the end of the inflator in the axial direction from the edge side away from the tip of the inflator along the axial direction of the inflator. . The airbag device according to claim 18, wherein an edge side of the second cover portion which is apart from the tip of the inflator along the axial direction of the inflator is sewn to the first cover portion.

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