JP6115428B2 - Airbag device - Google Patents

Description

  The present invention relates to an airbag apparatus equipped with an airbag that is mounted on a vehicle and inflates by inflating gas for expansion from a substantially cylindrical inflator.

  Conventionally, as an airbag to which a substantially cylindrical inflator is connected, an airbag main body and a reinforcing cloth disposed in the airbag main body have been provided (for example, see Patent Document 1). The airbag main body is connected to the inflator so as to allow the inflation gas to flow into the main body inflating portion and the main body inflating portion to inflate the inflating gas so as to separate the front side wall portion and the rear side wall portion. A cylindrical connection port portion. The connection port portion is connected so as to be substantially orthogonal to the main body inflating portion side, and connected to the inflator by inserting the inflator while being connected to be substantially orthogonal to the vertical cylinder portion, It was set as the structure mounted in a vehicle as the state bent in the L-shape which has. The reinforcing cloth was disposed so as to cover the outer periphery of the inflator between the front side wall portion and the rear side wall portion on the inner peripheral side of the connection port portion. The reinforcing cloth is formed by folding a sheet-like reinforcing cloth material in two and stitching a predetermined peripheral edge so as to guide the expansion gas to the main body expansion portion side.

Japanese Patent Laying-Open No. 2011-201518 ([0041], FIGS. 14 and 18)

  However, in the conventional airbag device, the reinforcing fabric of the airbag folds the sheet-like reinforcing fabric material in a folded manner on the upper edge side away from the main body inflating portion in the horizontal tube portion of the connection port portion. A suture site was provided in the vicinity of the front edge side away from the inflator of the vertical cylinder portion.

  Then, the inflation gas from the inflator supplied from the horizontal cylinder part of the connection port part to the main body expansion part via the vertical cylinder part flows along the axial direction of the horizontal cylinder part so as to hit the front edge of the vertical cylinder part Then, it flowed to the main body inflating part side along the axial direction of the vertical cylinder part. However, in the conventional airbag, a stitched portion of the reinforcing cloth is disposed on the edge side of the vertical cylinder portion that is in contact with the inflation gas.

  For this reason, there is a possibility that the stitched portion of the reinforcing cloth is damaged due to the damage of the high-temperature inflation gas, and there is a problem in the heat resistance of the reinforcing cloth.

  This invention solves the above-mentioned subject, and it aims at providing the airbag apparatus which can improve the heat resistance of the reinforcement cloth arrange | positioned in the connection port part of an airbag simply.

With the airbag apparatus according to the present invention is an air bag device to obtain Bei the inflator substantially cylindrical supply and the air bag, the inflation gas to the airbag to be inflated by flowing inflation gas,
The inflator has a configuration for supplying the inflation gas to the airbag by causing the inflation portion gas to flow out along the axial direction of the inflator from a tip portion having a gas discharge port,
The airbag includes an airbag body and a reinforcing cloth disposed in the airbag body,
The airbag body is
A main body expanding portion formed Nde膨Ra and away the front side wall portion and the rear side wall portion of the air bag body by flowing inflation gas,
A cylindrical connection port connected to the inflator so as to allow the inflation gas from the inflator to flow into the main body expansion part;
With
The connection port is
A vertical cylindrical portion connected so as to be substantially orthogonal to the main body expansion portion side;
A horizontal cylinder part connected to the inflator by connecting the tip part of the inflator to the inner peripheral side while being continuous substantially perpendicular to the vertical cylinder part,
I have a,
Said reinforcing fabric, on the side of the inner periphery of the joint port, not covering the outer periphery of the tip portion of at least the inflator and the inflation gas is discharged from the inflator, by changing the flow, the air bag a outflow direction end to Rue airbag device to the main inflatable part of the main body,
The reinforcing cloth is
A sheet-like reinforcing cloth member is formed by at least two fold,
The fold obtained by folding the reinforcing cloth material becomes a fold for reinforcement, and is on the edge side away from the inflator in the vertical cylindrical portion of the connection port portion and substantially along the axial direction of the vertical cylindrical portion. Arranged , and
A front side portion and a back side portion extending from the reinforcing fold to both sides are respectively disposed on the inner peripheral sides of the front side wall portion and the rear side wall portion of the connection port portion , and
Out of the side edges extending from the reinforcing folds in the front side part and the back side part, the front side part and the back side can flow out the expansion gas to the main body side edge on the main body expansion part side. separation unit to be possible to separate the parts are arranged, furthermore,
Wherein among the side edges extending from the reinforcing fold in the front side and the rear side, spaced apart side edges remote from the main expansion portion side, by Rukoto coupled to each other,
It is arrange | positioned so that the outer periphery of the said inflator may be covered by the inner peripheral side of the said connection port part.

  In the airbag device according to the present invention, the reinforcing fold for folding the reinforcing cloth material in half is on the edge side away from the inflator in the vertical cylindrical portion of the connection port portion, and substantially along the axial direction of the vertical cylindrical portion. The reinforcing cloth is formed and disposed in the connection port portion. That is, the expansion gas discharged from the inflator flows along the axial direction of the horizontal cylinder portion in the connection port portion, and even if it hits the reinforcing cloth, there is only a reinforcing fold at that portion, and the stitching is performed. Since there is no part, the suture part does not break itself, the flow can be changed smoothly, the separation gas can be passed through the separation part, and the inflation gas can flow to the main part expansion part. Can be improved.

  In addition, the reinforcing cloth is connected to each other by using stitches or the like, with the separation side edges separated from the main body inflating part side extending from the reinforcing folds in the front side part and the back side part, but the part In the fold for reinforcement, the expansion gas does not hit perpendicularly, and further, the expansion gas flows from the fold for reinforcement to the main body expansion portion side through the separation portion, Since the discharge pressure is hardly affected, damage caused by the high-temperature expansion gas is reduced.

  In addition, the reinforcing cloth can be easily constructed by simply arranging the reinforcing folds of the reinforcing cloth material at predetermined positions without using a separate member for improving heat resistance.

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

Then, in the airbag device according to the present invention, the reinforcing cloth member is clamshell with folds perpendicular substantially with the reinforcing fold, two-ply body is formed,
It is desirable that the reinforcing cloth is formed by providing the reinforcing fold on the two-layered body and folding it in half .

  In such a configuration, since the reinforcing cloth is configured as a double-layered body of reinforcing cloth materials, even if the reinforcing cloth material on the inner peripheral side is damaged by the expansion gas, the reinforcing cloth material on the outer peripheral side thereof. However, the front side wall part and the rear side wall part on the airbag main body side can be protected from the inflation gas, and the heat resistance of the reinforcing cloth can be further improved.

Further, in the airbag device according to the present invention, the reinforcing fabric,
A horizontal cylinder cover portion disposed in the horizontal cylinder portion of the connection port;
A vertical cylinder cover portion disposed in the vertical cylinder portion of the connection port portion;
An extending portion arranged to extend from the vertical cylinder cover portion on the main body expansion portion side of the horizontal cylinder cover portion;
Between the horizontal cylinder cover part and the extension part, a slit disposed so as to extend from an edge away from the reinforcing fold to the vicinity of the vertical cylinder cover part,
Equipped with a,
The connection port portion is formed by sewing the outer peripheral edges of the connection port portion fabric material forming the front side wall portion and the connection port portion cloth material forming the back side wall portion,
The front side portion of the reinforcing cloth is a stitched portion between the outer peripheral edges of the connecting port portion cloth material forming the front side wall portion and the connecting port portion cloth material forming the back side wall portion in the connecting port portion. It is preferable that the reinforcing cloth is disposed in the connection port portion by sewing together the separation side edges of the back side portion and the back edge portion and the slit periphery.

  In such a configuration, the reinforcing cloth constituting the reinforcing cloth is separated from the front side portion and the rear side portion when the outer peripheral edges of the front side wall portion and the rear side wall portion forming the connection port portion are stitched together. Since the edges and the edges of the slits are stitched together and disposed in the connection port portion, displacement of the reinforcing cloth is prevented.

  Since the reinforcing cloth has a predetermined slit, when the inflater is inserted into the horizontal cylinder portion at the connection port portion, the horizontal cylinder cover portion of the reinforcing cloth is expanded by the slit so that the extending portion is sewn. It is possible to move away from the section side, and to smoothly perform the connection work with the connection opening of the inflator, including the assembly work of connection means such as a clamp for connecting the inflator to the connection opening.

Furthermore, in the airbag device according to the present invention, the inflation gas flowing from the vertical tube portion side of the connection port portion to the main body inflating portion side is interposed between the reinforcing cloth and the airbag main body. An inner tube is arranged to be guided so as to be branched into two hands opposite to each other substantially perpendicular to the axial direction of the cylindrical portion,
The inner tube is
It is formed by folding at least two sheet-like tube cloth materials,
Fold folding said tube cloth material, become fold tube is arranged on the veranda remote from the connecting opening portion in the flow path which is branched inflation gas into the second-hand in the inner tube, also,
A front side portion and a rear side portion that extend from the tube fold to both sides are disposed on the outer peripheral side of the reinforcing cloth, and each of the front side wall portion and the rear side wall portion of the airbag body. by Rukoto disposed circumferentially side,
It is desirable that the reinforcing cloth and the airbag main body are disposed.

  In such a configuration, even if the main body inflating portion of the airbag body is inflated by supplying an inflating gas back and forth, the inner tube can smoothly inflate the main body inflating portion by flowing the inflating gas. it can. And the inner tube itself is a tube that forms the inner tube without providing a stitched portion at the portion that receives the expansion gas from the vertical cylindrical portion of the connection port portion, that is, at the edge side away from the connection port portion. It is the structure which arrange | positions the fold for tubes which folded the fabric material, and can improve the heat resistance of an inner tube by simple structure only arrange | positioning the fold for tubes in a predetermined position.

Further, when such an inner tube is used, the inner tube is branched into a bifurcated shape from an inlet side portion disposed in the connection port portion and an end portion of the inlet side portion. Two exit sides arranged at the position of the eye,
At least one of said outlet side, extended cylinder portion for guiding the inflating gas is being sewn,
The tube cloth material is folded in two at a fold substantially orthogonal to the tube fold, and a two-layered body formed as a two-layer structure is formed,
The inner tube is formed by forming the tube fold in the two-layered body,
The extending tube portion is stitched to the inner peripheral side of the outer peripheral portion located on the outer peripheral side of the two-layered body in the at least one outlet side portion, and the stitched portion is positioned on the inner peripheral side of the two-layered body It is desirable that the inner peripheral portion is covered .

  When the extended tube portion is connected to the outlet side portion of the inner tube by sewing, in the configuration as described above, the suture portion is covered with the inner peripheral portion of the two-layered tube cloth material. Heat resistance can be improved.

  Of course, the inner tube itself is composed of a double-layered body of tube cloth material from the inlet side portion to the outlet side portion, so that further improvement in heat resistance can be ensured.

It is the front view seen from the vehicle inner side of the vehicle carrying the head protection airbag device of one embodiment concerning the present invention. It is a general | schematic partial enlarged front view of the inflator vicinity at the time of the action | operation of the airbag apparatus of 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 figure explaining the process of forming the reinforcement cloth used for the airbag of embodiment. It is a figure explaining the process of forming the inner tube used for the airbag of an embodiment. It is a figure explaining the process of manufacturing the airbag of an embodiment. It is a figure explaining the process of manufacturing the airbag of an embodiment, and shows the back of Drawing 9. It is a figure explaining the process of connecting the inflator etc. to the airbag of embodiment, and forming the airbag assembly | attachment body which can be mounted in a vehicle.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The airbag device of the embodiment is a head protection airbag device S as shown in FIG. In the following description, the air bag 30 is simply referred to as an airbag 30, the inflator 20 that discharges the inflation gas, the airbag cover 11, and the mounting bracket 13. The airbag 30 is arranged from the lower edge side of the front pillar portion FP on the upper edge WU side of the windows (side windows) W1 and W2 arranged side by side on the side of the front seat and the rear seat inside the vehicle V. It is folded and stored in a range from above the intermediate pillar portion CP to above the rear pillar portion RP.

As shown in FIGS. 2 to 4, the inflator 20 is connected to the airbag 30 by being inserted into a connection port 33 (described later) for allowing the inflation gas G to flow into the airbag 30 as a substantially cylindrical cylinder type. Is done. The inflator 20 includes a main body 21 containing a chemical that burns and generates an expansion gas G and an ignition device, and a diffuser 22 made of sheet metal. The main body 21 is sandwiched by the diffuser 22 on the base portion 21a side. A plurality of gas discharge ports 21c for discharging expansion gas are provided at the small-diameter tip portion 21b. The diffuser 22 is configured to allow the expansion gas G from the gas discharge port 21c to flow out from the outflow port 22a on the end surface on the tip end portion 21b side and the lower outflow port 22b. An attachment bracket portion 22c for attaching the inflator 20 to the inner panel 2 on the body 1 side of the vehicle V is provided. That is, the inflator 20 is configured to cause the inflation gas G to flow out from the tip portion 21b having the gas discharge port 21c through the outlet port 22a and away from the inflator 20 along the axial direction of the inflator 20. . An attachment hole 22d for inserting a bolt 24 attached to the inner panel 2 is formed in the attachment bracket portion 22c. The inflator 20 is covered with the lower edge 5a of the roof head lining 5 with respect to the inner panel 2 of the roof side rail portion RR in the vicinity of the upper portion of the intermediate pillar portion CP by fixing the mounting bracket portion 22c with the bolt 24. And fixed (see FIG. 1). Further, the inflator 20 is inserted into a later-described horizontal tube portion 35 of the connection port portion 33 and pressed so that the horizontal tube portion 35 is clamped to the inflator 20 side by a clamp 26 as a connecting means. Connected to.

  The inflator 20 is operated by a predetermined control device that detects a side collision of the vehicle V.

  Each mounting bracket 13 fixes a mounting portion 60 (described later) of the airbag 30 to the inner panel 2 by mounting bolts 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 includes a lower edge 4a side of the front pillar garnish 4 disposed on the front pillar portion FP and a lower edge 5a side of the roof head lining 5 disposed on the roof side rail portion RR. And is composed of.

  As shown in FIGS. 1 and 5, the airbag 30 includes an airbag body 31 that is inflated so as to cover the windows W1 and W2, an inner tube 63 and a reinforcing cloth 81 that are disposed in the airbag body 31. It is prepared for.

  As shown in FIGS. 1, 5, and 11, the airbag main body 31 flows in the inflation gas G from the inflator 20 and expands from the folded state, so that the windows W <b> 1 and W <b> 2, the intermediate pillar portion CP, and the rear pillar It expands and expands so as to cover the inside of the part RP. As shown in FIGS. 2 to 5, the airbag main body 31 allows the inflation gas G to flow in to separate the vehicle interior side wall portion 32 a as the front side wall portion and the vehicle exterior side wall portion 32 b as the back side wall portion. And a non-inflow portion 45 that does not allow the expansion gas G to flow in such a state that the inner wall portion 32a and the outer wall portion 32b of the vehicle are combined.

  The gas inflow portion 32 flows the main body inflating portion 37 covering the windows W1 and W2, the intermediate pillar portion CP, and the rear pillar portion RP inside the vehicle, and the inflating gas G from the inflator 20 into the main body inflating portion 37. And a cylindrical connection port 33 connected to the inflator 20.

  The connection port portion 33 is disposed so as to protrude upward from the vicinity of the center in the front-rear direction of the main body expansion portion 37. The connection port portion 33 is connected to the main body inflating portion 37 so as to protrude substantially orthogonally upward from the main body inflating portion 37 side, and at the upper end of the vertical cylinder portion 34, the vertical cylinder portion. A horizontal cylinder portion 35 that is connected to the inflator 20 by inserting the inflator 20 through the opening 35c at the rear end of the horizontal cylinder portion 35, and is connected to the vertical cylinder portion 34 so as to protrude rearward substantially orthogonally from 34. It is configured as an L-shape, and is mounted on the vehicle V as its bent state.

  Further, the main body inflating portion 37 has a front inflating portion 39 disposed so as to cover the vehicle inner side of the window W1 and a rear inflating portion 40 disposed so as to cover the inner side of the window W2 when the expansion is completed. And a supply path portion 38 disposed in a cylindrical shape along the front-rear direction on the upper edge 31a side of the airbag body 31. The supply path portion 38 is connected to the connection port portion 33 at an intermediate portion in the front-rear direction, and the expansion gas G from the connection port portion 33 is expanded to the front side expansion portion 39 and the rear side expansion using the inner tube 63. It becomes a part supplied to part 40.

  Further, in the case of the embodiment, the airbag main body 31 includes, as constituent members, a mounting portion 60 to be described later of the non-inflow portion 45, and a connection port portion that configures the vehicle interior side wall portion 32a and the vehicle exterior wall portion 32b of the connection port portion 33. The cloth material 52 (see FIGS. 2, 3, 6, and 10 A and B) and the bag weaving portion 47 that forms the main body inflatable portion 37 and is formed by bag weaving, and is composed of three types of members. Has been. The bag weaving portion 47 is formed by bag weaving from a yarn such as polyamide or polyester, and constitutes a gas inflow portion 32 that is inflated so that the inflating gas G flows in and separates the vehicle inner side wall portion 32a and the vehicle outer side wall portion 32b. The bag main body portion 48 and the closing portion 49 disposed around the gas inflow portion 32 are configured. The connection port portion fabric material 52 (52I, 52O) and the attachment portion 60, and the reinforcing fabric material 90, tube fabric material 70, and extended tube portion fabric material 78, which will be described later, are woven fabrics such as polyamide. Formed from.

  The non-inflow portion 45 includes a peripheral edge portion 46 and an attachment portion 60. The peripheral edge portion 46 is formed so as to surround the gas inflow portion 32, and an upper edge 46 a located on the upper edge 31 a side of the airbag body 31 is formed by bag weaving, and a closing portion 49 of the bag weaving portion 47. And a bag forming stitching portion 55 formed by stitching integrally with the connection port portion cloth material 52 and 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 body 31, and a dividing portion 50 serving as an opening is disposed between the two. Yes. As shown in FIGS. 3 and 9, the extension part 52 c of the connection port portion cloth material 52 (52 I, 52 O) is provided on the inner wall part 32 a and the outer wall part 32 b at the periphery of the dividing part 50, respectively. It is stitched by the connecting stitching portion 57.

  As shown in FIGS. 2, 3, and 9, the connection port portion cloth materials 52 </ b> I and 52 </ b> O form a vehicle inner wall portion 32 a and a vehicle outer wall portion 32 b of the connection port portion 33. 34 for forming the vertical cylinder part, the horizontal cylinder part 52b for forming the horizontal cylinder part 35, the extension part 52c sewn to the main body inflating part 37 side, in other words, the dividing part 50 side, It is equipped with. A slit 52d extending forward is formed between the horizontal cylinder part 52b and the extended part 52c on the opening 35c side of the horizontal cylinder part 35b.

  Then, the inner side wall portion 32a and the outer side wall portion 32b of the dividing portion 50 and the connection port portion 33 are stitched together by the front edge side stitching portion 55a and the rear edge side stitching portion 55b of the bag forming stitching portion 55. Yes. The front edge side stitching portion 55a extends rearward from the upper front closing portion 49a, passes through the divided portion 50, and passes through the front edge 34a of the vertical tube portion 34 of the connection port portion 33 to the inner side wall portion 32a of the upper edge 35a of the horizontal tube portion 35. And the vehicle exterior wall 32b are stitched together (see FIG. 5). The rear edge side stitching portion 55b extends forward from the upper rear closing portion 49b, passes through the dividing portion 50, and passes from the rear edge 34b of the vertical tube portion 34 of the connection port portion 33 to the lower edge 35b of the horizontal tube portion 35 (in other words, The vehicle inner side wall portion 32a and the vehicle outer side wall portion 32b at the periphery of the slit 52d are stitched together (see FIG. 9).

  In the case of the embodiment, the front edge side suture portion 55a and the rear edge side suture portion 55b of the bag forming suture portion 55 are also sewn together with the reinforcing cloth 81 and the inner tube 63.

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

  The front end attaching portion 60F is formed by sewing a separate cloth material made of woven fabric such as polyamide to the front edge 46c of the peripheral edge portion 46 formed by bag weaving of the airbag body 31. ing. Further, the attachment portion 60F is fixed near the lower portion of the front pillar portion FP, and when the airbag 30 is inflated, the lower edge 31b side of the airbag 30, specifically, the attachment portion 60F and the front pillar portion FP. It is configured to exert a strong tension on a line connecting the mounting portion 60 (60B, see FIG. 1) away from the vehicle to improve the restraint of the airbag 30 on the passenger's interior side.

  Note that the second attachment portion 60S from the front is sewn to the cloth material of the attachment portion 60F.

The reinforcing cloth 81 is disposed so as to cover the outer periphery of the inflator 20 between the vehicle inner wall portion 32a and the vehicle outer wall portion 32b made of the connection port portion cloth materials 52I and 52O on the inner peripheral side of the connection port portion 33. Is done. Specifically, the reinforcing cloth 81 changes the flow of the expansion gas G that covers at least the outer periphery of the tip portion 21b of the inflator 20 and flows out of the inflator 20 on the inner peripheral side of the connection port portion 33. The airbag main body 31 is disposed so as to be able to flow out to the main body inflating portion 37 side .

  As shown in FIGS. 6 and 7, this reinforcing cloth 81 uses a two-layered body 92 in which two sheets of reinforcing cloth material 90 in a sheet-like substantially rectangular plate shape are stacked, and the two-layered body 92 is folded in two. Is formed. And, as shown in FIGS. 2 and 5, the fold obtained by folding the two-layered body 92 as a reinforcing fold 91, on the edge side away from the inflator 20 in the vertical cylindrical portion 34 of the connection port portion 33, It is arranged along the vertical direction which is the front edge 34a side and which is the axial direction VD of the vertical cylindrical portion 34. As shown in FIGS. 7A and 7B, the double-layered body 92 has a horizontally long substantially rectangular plate shape, and a large substantially rectangular plate-like reinforcing cloth material 90 is overlapped perpendicularly to the reinforcing fold 91. The fold 93 is provided and is formed by being folded in half. In the case of the embodiment, as shown in FIGS. 7A to 7C, the reinforcing cloth 81 is formed by providing the folding fold 93 and the reinforcing fold 91 and folding the reinforcing cloth material 90 in four. Has been.

  As shown in FIGS. 2, 3, and 7, the reinforcing cloth 81 has a portion extending on both sides from the reinforcing fold 91 as a front side wall portion of the connecting port portion 33 a as a front side wall portion 32 a (connecting port portion cloth material). 52I) and the vehicle interior side 81a as the front side and the vehicle as the back side disposed on the inner peripheral side of the vehicle exterior wall 32b (connection port fabric 52O) as the back side wall. The outer portion 81b is used.

  Further, the reinforcing cloth 81 is supplied with the expansion gas G on the main body side edge (lower edge) 81c on the main body inflating portion 37 side extending from the reinforcing fold 91 in the inboard side portion 81a and the outboard side portion 81b. A separation portion 81d that separates to the side of 37 is arranged. Furthermore, the separation side edge (upper edge) 81e that is separated from the main body expansion portion 37 side extending from the reinforcing fold 91 in the vehicle inner side portion 81a and the vehicle outer side portion 81b is formed as the upper edge of the horizontal cylindrical portion 35 of the connection port portion 33. On the 35a side, an upper edge side stitching portion 87 is provided and stitched together. In the case of the embodiment, the upper edge side stitching portion 87 is configured as a front edge side stitching portion 55a for stitching the connection port portion cloth materials 52I and 52O, and the reinforcing cloth 81 is formed by separating the separation side edge (upper edge) 81e from each other. It is sewed together with the connecting port portion fabric materials 52I and 52O.

  Further, in the case of the embodiment, the vehicle inner side portion 81a and the vehicle outer side portion 81b of the reinforcing cloth 81 are formed in a substantially rectangular plate shape and extend to the main body expansion portion 37 side beyond the vertical cylindrical portion 34 together with the reinforcing fold 91. Arranged. The reinforcing cloth 81 includes a horizontal cylinder cover portion 84 arranged in the horizontal cylinder portion 35 of the connection port portion 33, a vertical cylinder cover portion 83 arranged in the vertical cylinder portion 34 of the connection port portion 33, and a main body expansion portion. And an extending portion 85 disposed on the 37 side. A slit 86 extending forward from an end edge (rear edge) 81 f away from the reinforcing fold 91 is formed between the horizontal cylinder cover portion 84 and the extending portion 85. The slit 86 is disposed so as to extend to the vicinity of the rear edge 34 b of the vertical cylinder portion 34 in the vertical cylinder cover portion 83.

  The vehicle interior portion 81a and the vehicle exterior portion 81b around the slit 86 are sewn together by providing a trailing edge side stitching portion 88. In the case of the embodiment, the trailing edge side stitching portion 88 is configured as a trailing edge side stitching portion 55b that stitches the connection port portion fabric materials 52I and 52O together, and the reinforcing fabric 81 has the periphery of the slit 86 mutually connected to the connection port portion. The cloth materials 52I and 52O are sewn together.

  That is, as already described, when the outer peripheral edges of the connection port portion fabric material 52I as the vehicle inner side wall portion 32a and the connection port portion cloth material 52O as the vehicle outer side wall portion 32b are stitched together in the connection port portion 33 ( When the bag forming stitching portion 55 is stitched), the reinforcing cloth 81 is sewn together with the separation edge 81e of the inner side 81a and the outer side 81b of the reinforcing cloth 81 and the periphery of the slit 86, thereby reinforcing the reinforcing cloth 81. Is disposed in the connection port 33.

  2-5, the inner tube 63 is arrange | positioned between the reinforcement cloth 81 and the airbag main body 31, and flows in from the vertical cylinder part 34 side of the connection port part 33 to the main body expansion part 37 side. A gas G for expansion is guided to be branched into two opposite front and rear sides substantially perpendicular to the axial direction VD of the vertical cylinder portion 34 and supplied to the front expansion portion 39 and the rear expansion portion 40. It is.

  As shown in FIGS. 5, 6, and 8, the inner tube 63 is formed by folding a double-layered body 74 in which two tube cloth materials 70 are stacked into two by providing a tube fold 75. The tube fold 75 is arranged on the lower edge 63c side away from the connection port portion 33 in the flow path in which the expansion gas G in the inner tube 63 is bifurcated. The inner tube 63 has portions extending from the tube fold 75 on both sides on the outer peripheral side of the reinforcing cloth 81, so that the inner side wall portion 32 a and the outer side wall portion 32 b of the airbag body 31 are respectively connected to the inner tube 63. It is comprised as the vehicle inside part 63a as a front side part arrange | positioned at the circumference side, and the vehicle outside part 63b as a back side part.

  This inner tube 63 branches into a bifurcated front and rear from the inlet side portion 64 disposed in the connection port portion 33 and the lower end 64a of the inlet side portion 64, in other words, at the position of the tube fold 75. For example, two outlet side portions 65 and 66 are arranged at the position of the supply path portion 38.

  In the inner tube 63 of the embodiment, as shown in FIG. 8, a strip-shaped tube cloth material 70 that is long in the front-rear direction is folded in two with a folding fold 73 extending vertically in the center in the front-rear direction, A double-sheeted body 74 is formed, and is further formed by being folded in two with a tube fold 75 extending forward and backward at the center in the vertical direction. Therefore, the inner tube 63 of the embodiment is disposed on the outer peripheral side of the inner peripheral portion 71 and the inner peripheral portion 71 disposed on the inner peripheral side of the inner tube 63 when the tube is folded in two with the folds 75 for tubes. It is comprised from the two-layered body 74 with the outer peripheral part 72 which is.

  Note that when the tube cloth material 70 is formed in the inner tube 63, a vertical cylinder portion having an outer shape corresponding to the vertical cylinder portion 34 or the horizontal cylinder portion 35 of the connection port portion 33 in which the inlet side portion 64 is disposed. 70a, a side cylinder portion 70b, a supply path portion portion 70c having an outer shape corresponding to the supply path portion 38 where the outlet side portions 65 and 66 are disposed, and a slit 70d corresponding to the slits 52d and 86. Yes.

  In addition, in the case of the embodiment, an extended cylindrical portion 77 that guides the inflation gas G backward is stitched to the outlet side portion 66 of the inner tube 63.

  The extended cylinder part 77 is formed by folding a rectangular plate-like extended cylinder part cloth material 78 into two at a fold 79 along the front-rear direction at the center in the vertical direction. The suture part 78a on the front edge side of the material 78 is placed on the inner circumference side of the suture part 72a on the rear edge side of the outer peripheral part 72 before forming the two-layered body 74 of the inner tube 63, and the suture parts 72a and 78a are mutually connected. Is formed by stitching. When the tube cloth material 70 forms the double-folded body 74 with the tube cloth material 70 forming the double-layered body 74, the inner peripheral side of the suture portion 78 a of the extended cylindrical portion 77 is covered with the inner peripheral portion 71.

  If the inner tube 63 is folded in two at the tube fold 75 in a state where the extended cylindrical portion 77 is stitched, the portions extending from the tube fold 75 to both sides are the vehicle inner side portion 63a and the vehicle outer side portion 63b. The vehicle inner side portion 63a and the vehicle outer side portion 63b are connected to each other by using the front edge side stitching portion 55a and the rear edge side stitching portion 55b of the bag forming stitching portion 55. The cloth material 52 is sewn together.

  Next, the manufacture of the airbag 30 of the embodiment will be described. The bag weaving portion 47 is formed in advance, and as shown in FIGS. 32b and the connection port portion fabric materials 52I and 52O are sewn by providing a connecting stitching portion 57 using a suture 95.

  Next, as shown in FIGS. 8A to 8D, the extended tube portion cloth material 78 is stitched to the tube cloth material 70, and a predetermined folding fold 73 and a tube fold 75 are attached and folded. The inner tube 63 and the extended cylindrical portion 77 are prepared, and as shown in FIG. 9B and FIG. 10A, the portions of the supply passage portion 28 and the connection port portion 33 in the airbag main body 31 are provided. The inner tube 63 and the extended cylindrical portion 77 are disposed.

  Further, as shown in FIGS. 7A to 7C, a reinforcing cloth 81 formed by folding a reinforcing cloth material 90 with a predetermined folding fold 93 and a reinforcing fold 91 into four is prepared. As shown in FIGS. 10A and 10B, a reinforcing cloth 81 is disposed from a portion of the connection port 33 in the airbag main body 31 to a portion of the main body inflating portion 37 in the vicinity thereof. Then, a front edge side stitching portion 55a and a rear edge side stitching portion 55b of the bag forming stitching portion 55 using the suture thread 95 are provided, and the connection port portion cloth materials 52I and 52O, the reinforcing cloth 81, the inner tube 63, and The extended cylindrical portion 77 is sewn together.

  And as shown to B and C of FIG. 10, if the attaching part 60 is stitched | sutured to a predetermined site | part, the airbag 30 can be formed.

  Thereafter, as shown in FIGS. 11A and 11B, the airbag 30 is folded, and a breakable tape 97 for preventing collapse is wound, and the mounting bracket 13 is mounted on the mounting portion 60. Further, as shown in C and D of FIG. 11, the inflator 20 is connected to the inner peripheral side of the horizontal cylinder cover portion 84 of the reinforcing cloth 81 in the horizontal cylinder portion 35 from the opening 35 c of the horizontal cylinder portion 35 of the connection port portion 33. If the clamp 26 is fastened so as to be pressed from the outer peripheral side of the horizontal cylinder part 35 to the inflator 20 side and the inflator 20 is connected to the horizontal cylinder part 35, the airbag assembly 99 can be assembled. it can.

  And the airbag assembly | attachment body 99 assembled in this way arrange | positions each attachment part 60 which attached the attachment bracket 13 in the corresponding attachment site | part of the inner panel 2 by the side of the body 1, and is penetrated to each attachment hole 60a. The mounting bolt 14 is fastened to the screw hole, the mounting bracket portion 22c is fastened to the bolt 24, the inflator 20 is fixed to the inner panel 2, and the airbag assembly 99 is attached to the body 1. Next, a lead wire (not shown) extending from a predetermined control device for inflator operation 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.

  If the inflator 20 is operated after the head protection airbag device S is mounted on the vehicle V, the inflation gas G is discharged from the gas discharge port 21c of the main body 21 of the inflator 20, and the outlet 22a, 22b flows into the connection port 33 and flows to the main body expansion portion 37 side. Specifically, as shown in FIGS. 2 to 4, the expansion gas G flows out from the outlets 22 a and 22 b of the diffuser 22 to the inner peripheral side of the reinforcing cloth 81, and further passes through the separation portion 81 d of the reinforcing cloth 81. The airbag 30 flows to the outlet side portions 65 and 66 of the inner tube 63 and the extending cylinder portion 77 and flows to the front side inflating portion 39 and the rear side inflating portion 40 of the main body inflating portion 37. 11 is opened and expanded as shown by the two-dot chain line in FIG. 1 so as to cover the vehicle interior sides of the windows W1 and W2, the intermediate pillar portion CP, and the rear pillar portion RP.

At this time, in the head protection airbag device S of the embodiment, as shown in FIGS. 2 to 4, the reinforcing fold 91 that folds the reinforcing cloth material 90 is provided in the vertical cylindrical portion 34 of the connection port portion 33. A reinforcing cloth 81 is provided in the connection port portion 33, which is formed on the front edge 34 a side away from the inflator 20 and in the vertical direction substantially along the axial direction VD of the vertical cylinder portion 34. That is, in such a configuration, the inflation gas G discharged from the inflator 20 flows out in the direction away from the inflator 20 along the axial direction of the inflator 20 through the outlet 22a, and the connection port 33 In this case, even if it flows forward along the axial direction LD of the horizontal tube portion 35 and hits the reinforcing cloth 81, there is only a reinforcing fold 91 and there is no stitched portion. The flow itself can be changed smoothly and the expansion gas G can flow to the main body expansion portion 37 side through the separation portion 81d, and as a result, the heat resistance of the reinforcing cloth 81 is improved. be able to.

  The reinforcing cloth 81 has a separation side edge (upper edge) separated from the main body inflating portion 37 extending from the reinforcing fold 91 in the vehicle inner side portion 81a as the front side portion and the vehicle outer side portion 81b as the back side portion. 81e are connected to each other by using the leading edge side stitching portion 55a, but the expansion gas G does not hit the orthogonal portion like the reinforcing fold 91, and further expands. Since the working gas G flows from the reinforcing fold 91 through the separating portion 81d to the main body expanding portion 37 side, and the discharge pressure does not act greatly, damage due to the high temperature expanding gas G is reduced. ing.

  In addition, the reinforcing cloth 81 can be dealt with without using a member for improving heat resistance separately by simply arranging the reinforcing fold 91 of the reinforcing cloth material 90 on the front edge 81g, and has a simple structure. it can.

  Therefore, in the head protection airbag device S of the embodiment, the heat resistance of the reinforcing cloth 81 disposed in the connection port portion 33 of the airbag 30 can be easily improved.

  And in head protection airbag device S of an embodiment, as shown in AC of Drawing 7, reinforcing cloth 81 is a folding fold 93 for which reinforcing cloth material 90 is almost perpendicular to reinforcing fold 91. The two-layered body 92 is previously folded in half, and a reinforcing fold 91 is provided on the two-layered body 92.

  Therefore, in the embodiment, since the reinforcing cloth 81 is configured as a two-layered body 92 of the reinforcing cloth material 90, the inner reinforcing cloth material 90A (see FIG. 3) is damaged by the expansion gas G. Further, the reinforcing cloth material 90B on the outer peripheral side can protect the vehicle interior side wall portion 32a as the front side wall portion on the airbag body 31 side and the vehicle outer side wall portion 32b as the back side wall portion from the inflation gas G, and the reinforcing fabric 81 The heat resistance of can be further improved.

  Further, in the head protection airbag device S of the embodiment, the vehicle inner side portion 81a and the vehicle outer side portion 81b of the reinforcing cloth 81 are formed in a substantially rectangular plate shape, together with the reinforcing fold 91, and the main body that exceeds the vertical cylindrical portion 34. It extends to the inflating part 37 side and is arranged. The vehicle inner side portion 81 a and the vehicle outer side portion 81 b include a horizontal cylinder cover portion 84 arranged in the horizontal cylinder portion 35 of the connection port portion 33 and a vertical cylinder cover arranged in the vertical cylinder portion 34 of the connection port portion 33. From an end edge (rear edge) 81f that is separated from the reinforcing fold 91 between the portion 83, the extending portion 85 disposed on the main body expanding portion 37 side, and the horizontal tube cover portion 84 and the extending portion 85. And a slit 86 disposed so as to extend to the vicinity of the vertical cylinder cover portion 83. Further, the connection port portion 33 is formed between the outer peripheral edges of the vehicle inner side wall portion 32a (connection port portion cloth material 52I) as the front side wall portion and the vehicle outer side wall portion 32b (connection port portion cloth material 52O) as the rear side wall portion. Are formed, and the side edges of the inner side 81a and the outer side 81b of the reinforcing cloth 81 are separated when the outer peripheral edges of the inner side wall 32a and the outer side wall 32b are stitched together. (Upper edge) 81e and the periphery of the slit 86 are sewn together, and the reinforcing cloth 81 is disposed in the connection port 33.

  Therefore, in the embodiment, when the reinforcing cloth material 90 constituting the reinforcing cloth 81 is stitched between the outer peripheral edges of the vehicle inner wall portion 32a and the vehicle outer wall portion 32b forming the connection port portion 33, the vehicle inner portion 81a Since the separation side edge 81e with the vehicle outer side portion 81b and the periphery of the slit 86 are mutually stitched and disposed in the connection port portion 33, the displacement of the reinforcing cloth 81 is prevented. The

  Since the reinforcing cloth 81 is provided with a predetermined slit 86, the horizontal cylinder cover portion 84 of the reinforcing cloth 81 is extended by the slit 86 when inserted into the horizontal cylinder portion 35 in the connection port portion 33 of the inflator 20. The connection port portion of the inflator 20 including the assembling work of the connecting means such as the clamp 26 for connecting the inflator 20 to the connection port portion 33, which can move away from the main body expansion portion 37 side to be sewn of the installation portion 85. The connection work with 33 can be performed smoothly.

  Further, in the head protection airbag device S of the embodiment, the inflation gas G flows between the reinforcing cloth 81 and the airbag body 31 from the vertical tube portion 34 side of the connection port portion 33 to the body expansion portion 37 side. The inner tube 63 is arranged so as to be branched to the opposite two front and rear sides substantially perpendicular to the axial direction VD of the vertical cylindrical portion 34. As shown in FIGS. 5 and 8, the inner tube 63 is formed by folding a sheet-like tube cloth material 70 into two with a tube fold 75. The inner tube 63 has a tube fold 75 that folds the tube cloth material 70, and the connection port 33 in the flow path (supply path portion) 38 that branches the expansion gas G in the inner tube 63 in two directions. A portion extending from the tube fold 75 to both sides is disposed on the lower edge 63c side, and is disposed on the outer peripheral side of the reinforcing cloth 81, so that the vehicle interior side wall portion 32a and the vehicle exterior wall portion 32b of the airbag body 31 It is comprised as the vehicle inner side part 63a and the vehicle outer side part 63b arrange | positioned by each inner peripheral side.

  Therefore, in the head protection airbag device S of the embodiment, the main body inflating portion 37 of the air bag main body 31 is inflated by supplying the inflation gas G to the front and rear front inflating portions 39 and the rear inflating portion 40. Even so, the inner tube 63 allows the expansion gas G to flow smoothly through the front expansion portion 39 and the rear expansion portion 40, thereby expanding the main body expansion portion 37. Further, the inner tube 63 itself is not provided with a stitching portion at a portion for receiving the expansion gas G from the vertical cylinder portion 34 of the connection port portion 33, that is, on the lower edge 63 c side away from the connection port portion 33. The tube folds 75 obtained by folding the tube cloth material 70 forming the inner tube 63 are arranged, and the inner tube 63 has a simple configuration in which the tube folds 75 are arranged on the lower edge 63c. The heat resistance of can be improved.

  Furthermore, in the embodiment, the inner tube 63 branches into a bifurcated shape from a cylindrical inlet side portion 64 disposed in the connection port portion 33 and an end portion (lower end) 64a of the inlet side portion 64. Two cylindrical outlet side portions 65 and 66 arranged at the position of the tube fold 75, and a cylindrical extending cylindrical portion 77 for guiding the inflation gas G to the rear side on the outlet side portion 66. Is configured to be sutured. The inner tube 63 includes a tube cloth material 70 as a double-layered body 74 of an inner peripheral portion 71 disposed on the inner peripheral side of the inner tube 63 and an outer peripheral portion 72 disposed on the outer peripheral side of the inner peripheral portion 71. The extending cylindrical portion 77 is stitched with the outer peripheral portion 72, and the stitched portions 72a and 78a are covered with the inner peripheral portion 71.

  Therefore, even if the inner tube 63 is configured to sew and connect the extended cylindrical portion 77 to the outlet side portion 66, the stitched portions 72 a and 78 a cover the inner peripheral portion 71 of the two-layered tube cloth 70. Therefore, the heat resistance of the sutured parts 72a and 78a can be improved.

  Of course, the inner tube 63 itself is composed of the double-layered body 74 of the tube cloth material 70 extending from the inlet side portion 64 to the outlet side portions 65 and 66, so that a further improvement in heat resistance can be secured. .

  In the inner tube 63 of the embodiment, the extended cylindrical part 77 is sewn to the rear outlet side part 66, but the extended cylindrical part 77 is sewn only to the front outlet side part 65 due to the arrangement of the inflated part. Alternatively, the extended cylindrical portion 77 may be sewn and connected to the front and rear outlet side portions 65 and 66.

  Further, when the extended tube portion is provided on the outlet side portion of the inner tube, the tube cloth material 70 is formed of a coated cloth having a coating layer for improving heat resistance, and the extended tube portion cloth material 78 is not coated. You may comprise from cloth.

  Furthermore, in the embodiment, the configuration in which the airbag 30 is provided with the inner tube 63 is illustrated. However, the inner tube 63 is not provided in the connection port 33, and the reinforcing cloth 81 is provided. The present invention may be applied to the airbag.

  Furthermore, in the embodiment, the head protection airbag device S is exemplified, but the airbag has a configuration in which the connection port portion protrudes from the main body inflating portion, and the connection port portion is L-shaped when mounted on the vehicle. As long as the airbag is bent in an L shape so as to form a vertical tube portion and a horizontal tube portion, the present invention can be implemented. The present invention may be applied to a pedestrian protection airbag or the like.

  Furthermore, the connection port portion of the airbag of the present invention simply protrudes linearly from the main body inflating portion and is bent into an L shape when mounted on a vehicle to form a vertical cylindrical portion and a horizontal cylindrical portion. There may be.

  Further, in the embodiment, the case where the periphery of the slit 86 in the vehicle inner side portion 81a and the vehicle outer side portion 81b of the reinforcing cloth 81 is sewn together with the airbag body 31 as the rear edge side stitching portions 55b and 88 is shown. The width of the vertical cylinder cover 83 in the front-rear direction is the dimension from the reinforcing fold 91 to the vicinity of the rear edge 34b of the vertical cylinder 34, and the rear edge of the vertical cylinder cover 83 away from the reinforcing fold 91. The 81 f side may not be sewn to the airbag body 31.

DESCRIPTION OF SYMBOLS 20 ... Inflator, 30 ... (Curtain) airbag, 31 ... Airbag main body, 32a ... (Front side wall part) Car interior side wall part, 32b ... (Back side wall part) Car outer side wall part, 33 ... Connection port part, 34 ... Vertical Cylinder part, 35 ... horizontal cylinder part, 37 ... main body expansion part,
63 ... Inner tube, 63a ... (front side portion) vehicle inner side portion, 63b ... (back side portion) vehicle outer side portion, 63c ... (edge away from connection port portion) lower edge, 64 ... inlet side portion, 65 ... ( Front) Exit side part, 66 ... (Rear) Exit side part, 70 ... Tube cloth material, 71 ... Inner peripheral part, 72 ... Outer peripheral part, 72a, 78a ... Suture part, 74 ... Double-layered body, 75 ... For tube Fold, 77 ... extended cylinder part,
81 ... Reinforcing cloth, 81a ... (front side) vehicle inner side, 81b ... (back side) outer side, 81c ... (lower edge) main body side edge, 81d ... separation part, 81e ... (upper edge) remote side Edge, 81f ... (rear edge) edge, 81g ... front edge, 83 ... vertical cylinder cover part, 84 ... horizontal cylinder cover part, 85 ... extension part, 86 ... slit, 90 ... reinforcing cloth material, 91 ... reinforcement Fold, 92 ... two-ply body, 93 ... fold fold,
V ... vehicle, G ... inflation gas, S ... head protection airbag device.

Claims (8)

An air bag which is inflated by inflow of inflation gas, with an air bag device to obtain Bei a substantially a cylindrical inflator for supplying inflation gas to the airbag,
The inflator has a configuration for supplying the inflation gas to the airbag by causing the inflation portion gas to flow out along the axial direction of the inflator from a tip portion having a gas discharge port,
The airbag includes an airbag body and a reinforcing cloth disposed in the airbag body,
The airbag body is
A main body expanding portion formed Nde膨Ra and away the front side wall portion and the rear side wall portion of the air bag body by flowing inflation gas,
A cylindrical connection port connected to the inflator so as to allow the inflation gas from the inflator to flow into the main body expansion part;
With
The connection port is
A vertical cylindrical portion connected so as to be substantially orthogonal to the main body expansion portion side;
A horizontal cylinder part connected to the inflator by connecting the tip part of the inflator to the inner peripheral side while being continuous substantially perpendicular to the vertical cylinder part,
I have a,
Said reinforcing fabric, on the side of the inner periphery of the joint port, not covering the outer periphery of the tip portion of at least the inflator and the inflation gas is discharged from the inflator, by changing the flow, the air bag a outflow direction end to Rue airbag device to the main inflatable part of the main body,
The reinforcing cloth is
A sheet-like reinforcing cloth member is formed by at least two fold,
The fold obtained by folding the reinforcing cloth material becomes a fold for reinforcement, and is on the edge side away from the inflator in the vertical cylindrical portion of the connection port portion and substantially along the axial direction of the vertical cylindrical portion. Arranged , and
A front side portion and a back side portion extending from the reinforcing fold to both sides are respectively disposed on the inner peripheral sides of the front side wall portion and the rear side wall portion of the connection port portion , and
Out of the side edges extending from the reinforcing folds in the front side part and the back side part, the front side part and the back side can flow out the expansion gas to the main body side edge on the main body expansion part side. separation unit to be possible to separate the parts are arranged, furthermore,
Wherein among the side edges extending from the reinforcing fold in the front side and the rear side, spaced apart side edges remote from the main expansion portion side, by Rukoto coupled to each other,
In the inner circumferential side of the connection port portion, so as to cover the outer periphery of the inflator, an airbag apparatus characterized by being arranged. The reinforcing cloth material is folded in two at a fold substantially orthogonal to the reinforcing fold, and a two-layered body is formed,
2. The airbag device according to claim 1, wherein the reinforcing cloth is formed by providing the reinforcing fold on the two-layered body and folding the reinforcing cloth into two. The reinforcing cloth is
A horizontal cylinder cover portion disposed in the horizontal cylinder portion of the connection port;
A vertical cylinder cover portion disposed in the vertical cylinder portion of the connection port portion;
An extending portion arranged to extend from the vertical cylinder cover portion on the main body expansion portion side of the horizontal cylinder cover portion;
Between the horizontal cylinder cover part and the extension part, a slit disposed so as to extend from an edge away from the reinforcing fold to the vicinity of the vertical cylinder cover part,
Equipped with a,
The connection port portion is formed by sewing the outer peripheral edges of the connection port portion fabric material forming the front side wall portion and the connection port portion cloth material forming the back side wall portion,
The front side portion of the reinforcing cloth is a stitched portion between the outer peripheral edges of the connecting port portion cloth material forming the front side wall portion and the connecting port portion cloth material forming the back side wall portion in the connecting port portion. 2. The reinforcing cloth is disposed in the connection port portion by sewing together the separation side edges of the back surface side portion and the slit peripheral edge together. Or the airbag apparatus of Claim 2. Between the reinforcing cloth and the airbag body, the inflation gas flowing from the vertical tube portion side of the connection port portion to the main body inflating portion side is substantially orthogonal to the axial direction of the vertical tube portion. An inner tube is arranged to guide the two branches on the opposite side.
The inner tube is
It is formed by folding at least two sheet-like tube cloth materials,
Fold folding said tube cloth material, become fold tube is arranged on the veranda remote from the connecting opening portion in the flow path which is branched inflation gas into the second-hand in the inner tube, also,
A front side portion and a rear side portion that extend from the tube fold to both sides are disposed on the outer peripheral side of the reinforcing cloth, and each of the front side wall portion and the rear side wall portion of the airbag body. by Rukoto disposed circumferentially side,
The airbag device according to any one of claims 1 to 3, wherein the airbag device is disposed between the reinforcing cloth and the airbag body. The inner tube has an inlet side portion disposed in the connection port portion, and two outlet side portions that are bifurcated from the end portion of the inlet side portion and are arranged at the position of the tube fold. And comprising
At least one of the outlet side portions is sewed with an extended tube portion that guides the inflation gas,
The tube cloth material is folded in two at a fold substantially orthogonal to the tube fold, and a two-layered body formed as a two-layer structure is formed,
The inner tube is formed by forming the tube fold in the two-layered body,
The extending tube portion is stitched to the inner peripheral side of the outer peripheral portion located on the outer peripheral side of the two-layered body in the at least one outlet side portion, and the stitched portion is positioned on the inner peripheral side of the two-layered body The airbag device according to claim 4, wherein the airbag device is covered with an inner peripheral portion. An air bag which is inflated by inflow of inflation gas, with an air bag device to obtain Bei a substantially a cylindrical inflator for supplying inflation gas to the airbag,
The inflator has a configuration for supplying the inflation gas to the airbag by causing the inflation portion gas to flow out along the axial direction of the inflator from a tip portion having a gas discharge port,
The airbag includes an airbag body and a reinforcing cloth disposed in the airbag body,
The airbag body is
A main body expanding portion formed Nde膨Ra to release the and the front side wall and the rear side wall portion of the air bag body by flowing inflation gas,
As a shape protruding from the main body inflating portion, a cylindrical connection port portion connected to the inflator so as to allow the inflating gas from the inflator to flow into the main body inflating portion,
With
Said reinforcing fabric, on the side of the inner periphery of the joint port, not covering the outer periphery of the tip portion of at least the inflator and the inflation gas is discharged from the inflator, by changing the flow, the air bag a outflow direction end to Rue airbag device to the main inflatable part of the main body,
The reinforcing cloth is
A horizontal cylinder cover portion that is disposed on the inner peripheral side of the connection port portion and into which the tip portion of the inflator is inserted;
A vertical cylinder cover part disposed on the inner peripheral side of the connection port part and bent from the horizontal cylinder cover part to the main body expansion part side;
An extending portion arranged to extend from the vertical cylinder cover portion on the main body expansion portion side of the horizontal cylinder cover portion;
While being formed with,
A sheet-like reinforcing cloth member is formed by at least two fold,
Said reinforcing cloth material broke folds, becomes reinforcing crease is disposed in the edge remote from the inflator, also,
A front side portion and a back side portion extending from the reinforcing fold to both sides are respectively disposed on the inner peripheral sides of the front side wall portion and the rear side wall portion of the connection port portion , and
Out of the side edges extending from the reinforcing folds in the front side part and the back side part, the front side part and the back side can flow out the expansion gas to the main body side edge on the main body expansion part side. A separating part separating the parts , and further ,
Wherein among the side edges extending from the reinforcing fold in the front side and the rear side, spaced apart side edges remote from the main expansion portion side, by Rukoto coupled to each other,
It is disposed on the inner peripheral side of the connection port portion so as to cover the outer periphery of the inflator and to allow the inflation gas flowing out from the inflator to flow out to the main body inflating portion side of the airbag body. A featured airbag device. The connection port portion is formed by sewing the outer peripheral edges of the connection port portion fabric material forming the front side wall portion and the connection port portion cloth material forming the back side wall portion,
A stitched portion between the outer peripheral edges of the connection port portion fabric material constituting the front side wall portion and the back side wall portion constituting the front side wall portion in the connection port portion is the front surface of the reinforcing cloth. The airbag apparatus according to claim 6, wherein the separated side edges of the side part and the back side part are joined together by sewing together.   Covering the distal end portion of the inflator with the gas discharge port on the inner peripheral side of the stitching portion of the separation side edge of the front side portion and the back side portion of the reinforcing cloth, the separation side The protective means for protecting the expansion gas discharged from the gas discharge port from being directly applied to the mutual stitched portions of the edges is provided. The airbag apparatus as described.

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