JP2006096288A - Airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an airbag device allowing improvement of connecting strength, even if the device is made to have a structure for connecting a connecting port part of an airbag and an inflator by utilizing a clamp. <P>SOLUTION: In this airbag device, the inflator 10 inserted into the connecting port part 26 of the airbag 20 is connected to the connecting port part 26 by utilizing the clamp 16. The airbag 20 is provided with an airbag main body 21 and reinforcing cloth 36. The reinforcing cloth 36 is provided with both end parts 36a and 36g arranged at facing positions along an extracting direction from the inflator 10 at the connecting port part 26 externally fitted in the inflator 10. In the reinforcing cloth 36, the one end part 36a side and the other end part 36g side are disposed as a connecting mounting part 37 connected to a non-flow part 28 at a peripheral edge of the connecting port part 26 of the airbag main body 21 and an assembling mounting part 38 assembled and fixed to the inflator 10, respectively. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an airbag apparatus including an airbag that protrudes from a storage portion of a vehicle and expands and inflates with an inflation gas supplied from an inflator.

  Conventionally, in an airbag device equipped with an airbag and an inflator mounted on a vehicle, the airbag is configured with a cylindrical connection port for allowing the inflation gas from the inflator to flow in ( For example, see Patent Document 1).

And this connection port part was connected to the inflator by being packaged by the inflator and being tightened by a clamp.
JP 2003-11768 A

  However, in the connection structure between the connection port portion and the inflator using only such a clamp, for example, if the output of the inflator increases with an increase in the volume of the airbag, the connection port There is a possibility that the part may come off from the inflator, and there is room for improvement in terms of improving the connection strength.

  This invention solves the above-mentioned subject, and provides the airbag apparatus which can improve connection intensity | strength also as a structure which connects the connection opening part and inflator of an airbag using a clamp. For the purpose.

An airbag device according to the present invention is folded and stored in a storage part of a vehicle, inflated with an inflating gas, and inflated to expand and inflate from the storing part, and an inflator for supplying the inflating gas to the airbag And comprising
An airbag device configured to include a cylindrical connection port portion connected to the inflator by being mounted on the inflator and tightened by a clamp so that the inflation gas flows in from the inflator. Because
The airbag has a connection port portion, and an airbag main body that expands and inflates by introducing an inflation gas, and a flexible reinforcing cloth for improving the connection strength between the connection port portion and the inflator Configured with
The air bag body includes a gas inflow portion that inflates so as to separate the opposing wall portions when the inflating gas flows in, and a non-inflow portion that does not allow the inflating gas to flow by connecting the opposing wall portions to each other,
The reinforcing cloth is provided with both end portions arranged at positions facing along the direction from the inflator in the connecting port portion that is sheathed by the inflator, and the one end portion side is not at the peripheral edge of the connecting port portion of the airbag body. It is characterized by being provided as a coupling attachment portion coupled to the inflow portion, and the other end side as an assembly attachment portion assembled and fixed to the inflator.

  In the airbag device according to the present invention, in the connection structure between the connection port portion of the airbag and the inflator, the connection port portion externally mounted on the inflator is tightened by the clamp, and the reinforcing cloth for improving the connection strength Is attached and connected to the inflator.

  The reinforcing cloth includes a coupling mounting portion that is coupled to a non-inflow portion on the airbag body side, and an assembly mounting portion that is assembled and fixed to the inflator. Are opposed to each other along the direction in which the connection port portion is removed from the inflator, and can be opposed to the connection port portion from being removed from the inflator, thereby improving the connection strength of the connection port portion to the inflator. be able to.

  Since the reinforcing cloth has flexibility if the coupling attachment portion is coupled to the airbag body in advance, it can be folded together with the airbag body, resulting in trouble in handling the airbag. I won't let you. Of course, since the coupling attachment portion is coupled to the non-inflow portion that does not allow the inflation gas to flow into the airbag body, gas leakage from the airbag body during inflation does not occur.

  In addition, if the coupling attachment part is joined to the airbag body, after folding the reinforcing cloth with the airbag body, the assembly attachment part is fixed to the inflator side at the same time as the clamp is tightened when connecting to the inflator. Therefore, an increase in the number of assembling steps for the airbag device can be suppressed.

  Therefore, in the airbag device according to the present invention, even if the connection port portion of the airbag and the inflator are connected using a clamp, the airbag device is not hindered and the assembly of the airbag device is not caused. Connection strength can be improved by suppressing an increase in man-hours.

  The reinforcing cloth assembly mounting portion may have a configuration in which fixing holes are provided in the reinforcing cloth and the inflator, and fixing means such as rivets, clips, bolts, etc. are inserted into these fixing holes and attached to the inflator. Alternatively, as long as the coupling attachment portion side can be stopped so as not to move in the direction in which the connection port portion is removed, it may be attached to the inflator by wrapping around the corresponding engagement portion of the inflator. Further, when the inflator is attached to the vehicle, it may be fastened together and attached to the inflator.

  In addition, the coupling attachment portion of the reinforcing cloth can be coupled to the airbag body by stitching using a suture thread, adhesion using an adhesive, or the like.

  The air bag is housed on the upper edge side of the window of the vehicle, with the opposite wall portion of the gas inflow portion as the vehicle inner wall portion located on the inner side of the vehicle and the vehicle outer side wall portion located on the outer side of the vehicle when deployment is completed. It is configured as a head protection airbag that protrudes downward so as to cover the inside of the window when deployed and inflated, and one of the front and rear directions of the airbag body that is deployed and inflated so that the connection port covers the window In the case where it is arranged at the end, it may be configured as follows. In other words, the reinforcing cloth is placed over the non-inflow part from both sides sandwiching the inner and outer walls of the airbag body during deployment and inflating, and the overlapping reinforcing cloth and the non-inflow part are shared. A joint attachment part is formed by sewing.

  In this way, if the joint attachment portion of the reinforcing cloth is configured by two-ply, the connection strength can be further improved, and the connection port portion is arranged at one end of the airbag body that is long in the front-rear direction. It can be suitably used for such a head protection airbag. That is, in the head protection airbag that is long in the front-rear direction, the inflation gas flowing in from the connection port portion flows into the airbag body along the axial direction of the connection port portion, and its capacity is large. This is because the portion can be more easily removed from the inflator, but it can be firmly countered by the double-layered reinforcing cloth.

  Further, as the airbag, the non-inflow portion includes a peripheral portion disposed at the outer peripheral edge of the airbag main body, and a thickness regulating portion disposed in the inflating region of the airbag main body that is on the inner side from the peripheral portion. If configured, the coupling attachment portion is formed by coupling to the thickness regulating portion, and the reinforcing cloth covers the expansion region of the airbag body from the vicinity of the connection opening portion to the vicinity of the thickness regulating portion coupled. It is desirable to arrange in this way.

  In such a configuration, when the inflation gas flows into the airbag body from the connection port portion, the opposing wall portions near the airbag body thickness regulation portion at the periphery of the connection port portion both suddenly outward. Although it swells, if the reinforcing cloth is disposed outside the both wall portions in the vicinity of the thickness restricting portion, it is possible to protect at the time of interference with peripheral parts in both wall portions of the area.

  Furthermore, in a head protection airbag in which a connection port is disposed at one end of an airbag body that is long in the front-rear direction, a tension along the front-rear direction is usually generated on the lower edge side when deployment is completed. Thus, even if it interferes with an occupant moving to the outside of the vehicle, it is configured to ensure restraint performance for restraining the occupant to the inside of the vehicle. Then, such a head protection airbag is provided with a reinforcing cloth having an assembly mounting portion that is attached to the inflator away from the connection port portion, and the reinforcing cloth has a thickness of an inflating region of the airbag body. If the coupling part of the coupling mounting part is arranged in the restricting part, the fixing point of the connecting body side of the airbag body to the vehicle body side is substantially fixed to the inflator by the mounting part of the reinforcing cloth. And the reinforcing cloth pulls the thickness regulating portion located below the airbag body from the upper edge side of the airbag body to the inflator side by the coupling attachment portion. Further, it becomes easier to generate a large tension pulling toward the inflator near the lower edge side of the airbag body, and the occupant restraining performance in the head protection airbag can be improved.

  In addition, if the joint attachment part has a joint part to the airbag body not only in the thickness regulating part but also in the peripheral part, the attachment strength is improved, and even if the reinforcing cloth generates a large tension, The reinforcing cloth can be stably attached to the airbag body.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, an airbag apparatus M according to an embodiment opens windows (side windows) W1, W2, and W3 of a vehicle V when deployment and inflation are completed. This is a head protection airbag device M configured to include a coverable head protection airbag 20. The airbag 20 is folded and accommodated in a range from the front pillar portion FP to the vicinity of the upper portion of the rear pillar portion RP of the roof side rail portion RR, with the upper edge side of the windows W1, W2, and W3 being the storage portion U. The vehicle V has two intermediate pillar portions P1 and P2 disposed substantially along the vertical direction between the front pillar portion FP and the rear pillar portion RP, and each window W1, W2, It is configured as a three-row seat type in which seats are provided on the inner side of the vehicle W3, and the airbag 20 at the time of completion of deployment is a vehicle with pillar garnishes 5 and 6 in the pillar portions P1 and P2, together with the windows W1, W2, and W3 The inside is also configured to cover.

  As shown in FIG. 1, the head protecting airbag device M includes an airbag 20, an inflator 10 that supplies inflation gas to the airbag 20, mounting brackets 14, 17, mounting bolts 13, 15, 18, and clamps 16. The folded airbag 20 and the inflator 10 are housed and covered with the airbag cover 8 when the vehicle is mounted on the vehicle V. In the case of the embodiment, the airbag cover 8 includes a lower edge 3a of the front pillar garnish 3 that covers the inside of the front pillar portion FP, a lower edge 4a of the roof head lining 4 that covers the inside of the roof side rail portion RR, It is composed of

  The front pillar garnish 3 and the roof head lining 4 are made of synthetic resin and are attached to the inner side of the inner panel 2 that is a member on the body 1 side of the front pillar portion FP and the roof side rail portion RR by attachment means (not shown). ing. The airbag cover 8 composed of the lower edges 3a and 4a is pushed by the airbag 20 so that the airbag 20 can be protruded when deployed and inflated so that the lower ends 3a and 4a are opened to the inside of the vehicle. It is configured.

  As shown in FIGS. 1 and 3, the inflator 10 includes a substantially cylindrical main body 10a and a diffuser 10b formed of a bent metal pipe joined to the tip (upper end) of the main body 10a. The expansion gas generated in 10a is discharged from the tip 10c of the diffuser 10b. And this inflator 10 inserts the front-end | tip 10c extended to the front side of the diffuser 10b in the connection port part 26 of the airbag 20, and clamp | tightens the clamp 16 mounted | worn near the rear end of the connection port part 26, and air bag 20 connection ports 26 (see FIG. 6). The inflator 10 has a main body 10 a held by a mounting bracket 14, and the mounting bracket 14 is fixed to the inner panel 2 on the body 1 side in the rear pillar portion RP using mounting bolts 15. Further, the diffuser 10b side includes a flat plate-like assembly portion 11 that protrudes upward in the vicinity of the tip 10c, and a bolt 13 is inserted into a mounting hole 11b provided in the assembly portion 11, and the bolt 13 is connected to the rear pillar. It is fixed to the inner panel 2 on the body 1 side by being fastened to the inner panel 2 on the body 1 side near the upper portion of the part RP.

  The assembling portion 11 is a portion for fixing the assembling attachment portion 38 of the reinforcing cloth 36. In addition to the attachment hole 11b, the rivet 12 for fixing the assembling attachment portion 38 to the assembling portion 11 is penetrated. The fixing hole 11a is provided (see FIG. 7).

  The inflator 10 is mounted on the vehicle V as an airbag assembly in which the inflator 10 and the airbag 20 are assembled.

  As shown in FIGS. 2 to 5, the airbag 20 is formed by bag weaving using polyamide yarn, polyester yarn or the like, and is sewn to the airbag body 21 so that it can be similar to the body 21. And two reinforcing cloths 36 made of a flexible cloth material.

  The airbag main body 21 includes a gas inflow portion 22 that inflates so as to separate the wall portions 22a and 22b facing the vehicle inner side and the vehicle outer side by allowing the inflation gas G to flow in, and the vehicle inner and vehicle outer wall portions 22a. 22b, and a non-inflow portion 28 through which the gas G does not flow. The gas inflow portion 22 includes a protective expansion portion 23, a gas supply path portion 25, and a connection port portion 26, and the non-inflow portion 28 includes a peripheral edge portion 29, an attachment portion 30, and plate-like portions 31 and 32. -33 and the thickness control part 34 are comprised.

  The protective inflating portion 23 of the gas inflow portion 22 is inflated to cover the inflating area 23a covering the side window W1 of the front seat and the side window W2 of the second row of seats when the airbag body 21 is completely deployed. An area 23b and an expansion area 23c covering the side window W3 of the third row of seats are provided. The gas supply path 25 extends along the front-rear direction on the upper edge 21a side of the airbag main body 21, and is arranged so as to communicate with the upper portions of the inflated areas 23a, 23b, and 23c.

  Further, the connection port portion 26 extends outward from one end in the front-rear direction on the upper edge 21a side of the airbag body 21, so that the inflation gas G from the inflator 10 can flow into the gas supply passage portion 25. In the case of the embodiment, it is arranged so as to extend rearward from the rear end of the main body 21, and is formed in a cylindrical shape having an open rear end so that it can be externally mounted on the front end 10c of the diffuser 10b of the inflator 10. . And the connection port part 26 is clamp | tightened by the clamp 16 in the state by which the exterior was carried out to the diffuser 10b, and is connected to the front-end | tip 10c of the diffuser 10b. As shown in FIGS. 3 and 6, the clamp 16 includes a cylindrical main body 10 a in which flange portions 10 b and 10 b are arranged at both ends in the circumferential direction, and the flange portions 10 b and 10 b are brought close to each other. By tightening the nut 10d to the bolt 10c inserted through the flange portions 10b and 10b and reducing the diameter of the inner peripheral side of the cylindrical main body 16a, the connection port portion 26 is brought into pressure contact with the outer peripheral surface of the diffuser tip 10c, And it is made to connect with the diffuser front-end | tip 10c.

  Further, in the inflating areas 23a, 23b, and 23c of the protective inflating portion 23, the airbag main body 21 at the time of inflating can maintain the plate shape extending in the front-rear direction while narrowing the width dimension in the front-rear direction. As shown in FIG. 2, a plurality of cells 24 partitioned by a thickness regulating portion 34 and plate-like portions 31 and 32 and arranged in parallel in the front-rear direction are arranged. Each cell 24 is arranged so that its upper end communicates with the gas supply passage 25 and extends in a bar shape in the vertical direction. In the case of the embodiment, the cells 24 communicate with each other also on the lower end side.

  The peripheral edge 29 of the non-inflow portion 28 is disposed on the outer peripheral edge of the gas inflow portion 22. The plate-like portions 31 and 32 are positioned between the expansion areas 23 a, 23 b, and 23 c below the gas supply passage portion 25, and are substantially rectangular plate-shaped, and the plate-like portion 33 is the airbag body 21. It is made into the triangular plate shape arrange | positioned at the front-end side. These plate-like portions 31, 32, and 33 secure the overall shape of the airbag main body 21 and reduce the volume of the portion through which the inflation gas G flows, so that the airbag main body 21 is inflated before the inflation is completed. It is arranged to make the time as short as possible.

  The thickness restricting portion 34 disposed between the cells 24 includes a substantially I-shaped thickness restricting portion 34a, an inverted L-shaped thickness restricting portion 34b, or the vicinity of the rear end of the airbag body 21. The thickness regulating portions 34c and 34d that are continuously formed from the lower edge portion 29c and the edge side edge portion 29b of the peripheral edge portion 37 are disposed.

  A plurality of mounting portions 30 are arranged on the upper edge 21a side of the airbag body 21 including the plate-shaped portion 33 so as to protrude upward, and the airbag body 21 is fastened to the inner panel 2 with bolts 18. The mounting hole 30a for carrying out is comprised. Each mounting portion 30 is attached with a mounting bracket 17 as a contact plate, and is bolted to the inner panel 2 with the bracket 17 together with the bracket 17.

  Then, as shown in FIGS. 2 to 7, the two reinforcing cloths 36 and 36 are sewn and arranged with respect to the non-inflow portion 28 at the periphery of the connection port portion 26 in the vicinity of the rear end of the airbag body 21. It is installed. As shown in FIGS. 2 and 3, the reinforcing cloth 36 has a substantially rectangular front part 36 a and a trapezoidal rear part 36 f with the lower edge side raised upward from the front part 36 a, and The substantially rectangular front part 36a is configured as a coupling mounting part (sewing mounting part) 37, and the upper end part 37g of the rear part 37f is configured as an assembly mounting part 38.

  These attachment portions 37 and 38 are respectively provided at both end portions of the connection port portion 26 connected to the tip 10c of the diffuser 10b at positions facing each other along the direction in which the diffuser tip 10c is removed from the diffuser tip 10c (the front-rear direction in the embodiment). Have been placed.

  And the coupling attachment part 37 is arrange | positioned in the area | region from the front side of the connection port part 23 to the front lower side, and the part 36b * 36c * 36d * of the edge | side (edge) of the upper and lower sides of the substantially rectangular front part 36a. 36e is applied to the upper edge 29b and the rear edge 29b of the peripheral edge 29 in the non-inflow portion 38 of the airbag body 21 or the thickness regulating portions 34b and 34d using the suture 40, respectively. , Stitched and formed.

  On the other hand, the assembly attaching part 38 is arranged at the upper end part 37g of the rear part 36f which is a region slightly shifted upward on the rear side of the connection port part 23, and is provided with a fixing hole 38a.

  The fixing hole 38a is disposed at a position where the connecting body portion 26 is connected to the inflator 10 using the clamp 16 in a state where the coupling attachment portion 37 is stitched to the airbag body 21 that is flatly deployed. With this state as a reference, the position coincides with the fixing hole 11a of the assembly portion 11 provided in the diffuser 10b.

  Further, in the case of the embodiment, as shown in FIGS. 4 to 7, two reinforcing cloths 36 are used, and these two reinforcing cloths 36, 36 are the vehicle interior / vehicle exterior wall portions of the airbag body 21. From both sides of the outer sides of 22a and 22b, a predetermined non-inflow portion 28 is sewn and arranged so as to sandwich the wall portions 22a and 22b.

  The outline of the process of mounting the head protection airbag device M on the vehicle V will be described in advance. The joint mounting portion 37 of the two reinforcing cloths 36 and 36 is previously connected to the predetermined non-inflow portion 28 of the airbag body 21. The airbag 20 is formed by attaching the joint attachment portions 37 of the reinforcing cloths 36 and 36 to the airbag main body 21 together with the suture thread 40 between the parts. Then, from the flatly deployed state of the airbag 20 in a non-inflated state, a fold C (see FIG. 2) parallel to the upper edge 21a is attached together with the reinforcing cloths 36 and 36, and the lower edge 21b side is the upper edge 21a side. The wrapping material (not shown) that can be broken is wound around the airbag 20 by folding the bellows by folding the bellows in a substantially vertical direction so as to approach the vehicle. Further, each mounting portion 30 is pulled out and a predetermined mounting bracket 17 is attached, and the tip 10c of the diffuser 10b in the inflator 10 in which the main body 10a is already attached to the connection bracket portion 26 is inserted into the connection port portion 26. The connection port 26 and the inflator 10 are connected by the clamp 16. Further, the rivet 12 as the fixing means is inserted into the fixing hole 38a of each reinforcing cloth 36 and the fixing hole 11a of the assembling portion 11 to fix the rivet 12, and the assembling mounting portion 38 of each reinforcing cloth 36 is fixed to the inflator 10. To form an airbag assembly. And if each mounting bracket 14 * 17 and the assembly | attachment part 11 are arrange | positioned in the position of the predetermined inner panel 2, and bolt 13,15 * 18 is stopped, an airbag assembly | attachment body will be mounted in the vehicle V. FIG. Can do.

  Thereafter, the lead wire 9 extending from the control device for operating the inflator is connected to the inflator 10, and the front pillar garnish 3 and the roof head lining 4 are attached to the inner panel 2 on the body 1 side, and further, the pillar garnish 5.6 If the rear pillar garnish 7 is attached to the inner panel 2 on the body 1 side, the head protection airbag device M can be mounted on the vehicle V.

  If the inflator 10 is actuated after the head protection airbag device M of the embodiment is mounted on the vehicle V, the inflation gas generated in the main body 10a of the inflator 10 passes through the diffuser 10b and the head protection airbag 20 Since the airbag 20 is supplied to the connection port 26 side, the airbag 20 causes the inflation gas G to flow from the connection port 26 into the gas supply path unit 25 and the plurality of cells 24 to push open the airbag cover 8. As shown by the two-dot chain line in FIG. 1, the expansion and expansion are completed so as to cover the windows W1, W2, and W3 and the inner sides of the pillar portions P1 and P2.

  In the airbag device M according to the embodiment, in the connection structure between the connection port portion 26 of the airbag 20 and the inflator 10, the connection port portion 26 that is sheathed on the diffuser tip 10 c of the inflator 10 is tightened by the clamp 16. Further, a reinforcing cloth 36 for improving the connection strength is attached and connected to the inflator 10.

  The reinforcing cloth 36 includes a coupling attachment portion 37 that is sewn to the non-inflow portion 28 on the airbag body 21 side, an assembly attachment portion 38 that is assembled and fixed to the inflator 10 using the rivet 12, The coupling attachment portion 37 and the assembly attachment portion 38 are opposed to each other in the front-rear direction, which is the direction in which the connection port portion 26 is removed from the inflator 10, and the connection port portion 26 is prevented from coming out of the inflator 10. Thus, the connection strength of the connection port portion 26 to the inflator 10 can be improved.

  The reinforcing cloth 36 has the coupling attachment portion 37 sewn to the airbag main body 21 in advance and has flexibility, so that it can be folded together with the airbag main body 21 and the airbag. There is no problem in handling the airbag 20 when forming an assembly. Of course, since the coupling attachment portion 37 is sewn to the non-inflow portion 28 that does not allow the inflation gas G in the airbag body 21 to flow in, it may cause gas leakage from the airbag body 21 during inflation. Absent.

  In addition, if the coupling attachment portion 37 is sewn to the airbag main body 21, after the reinforcing cloth 36 is folded together with the airbag main body 21, the attachment attachment portion 38 is simultaneously tightened with the clamp 16 when connected to the inflator 10. Therefore, the airbag 20 provided with the reinforcing cloth 36 and the inflator 10 should be assembled in advance as an airbag assembly before being mounted on the vehicle V. Thus, an increase in the number of assembling steps of the airbag apparatus M can be suppressed.

  Therefore, in the airbag apparatus M of the embodiment, even if the connection port portion 26 of the airbag 20 and the inflator 10 are connected using the clamp 16, the handling of the airbag 20 is not hindered, and The increase in the number of assembling steps for the airbag device M can be suppressed, and the connection strength can be improved.

  In the embodiment, the reinforcing cloths 36 and 36 are disposed so as to overlap the non-inflow portion 28 from both sides sandwiching the vehicle interior / vehicle exterior wall portions 22a and 22b of the airbag main body 21 when deployed and inflated. The joint attachment portion 37 is formed by sewing the overlapped reinforcing cloths 36 and 36 and the non-inflow portion 28 together. Thus, if the joint attachment part 37 of the reinforcing cloths 36 and 36 is constituted by two layers, the connection strength can be further improved, and a connection port is formed at one end of the airbag body 21 that is long in the front-rear direction. It can be suitably used for the head protection airbag 20 in which the portion 26 is disposed.

  That is, as in the embodiment, in the head protection airbag 20 that is long in the front-rear direction so as to be mounted on the three-row seat type vehicle V, the inflation gas G flowing from the connection port 26 is connected to the connection port 26. Since the capacity of the air bag body 21 flows into the airbag main body 21 along its axial direction and the capacity thereof is large, the connection port portion 26 is more easily removed from the inflator 10. This is because it can be firmly countered.

  In the embodiment, the non-inflow portion 28 has a peripheral portion 29 disposed on the outer peripheral edge of the airbag main body 21 and a thickness restriction disposed in the inflated region of the airbag main body 21 positioned on the inner side of the peripheral portion 29. 34, and the coupling attachment portion 37 has a stitching site (joint site) as a thickness not only for the upper and rear edge portions 29 a and 29 b of the peripheral portion 29 but also the portions 36 b and 36 e. The front portion 36a of the reinforcing cloth 36 is also disposed in the portions 36d and 36c of the restricting portions 34b and 34d so that the front portion 36a of the reinforcing cloth 36 extends from the vicinity of the connection port portion 26 to the vicinity of the thickness restricting portions 34b and 34d. In the case of the embodiment, it is arranged so as to cover substantially the entire rear upper side of the rear side expansion area 23c.

  In such a configuration, when the inflation gas G flows into the airbag main body 21 from the connection port portion 26, the vicinity of the thickness regulating portions 34b and 34d of the airbag main body 21 at the periphery of the connection port portion 26, that is, the expansion area Although the wall portions 22a and 22b facing each other on the upper side of 23c suddenly bulge outward, the reinforcing cloth 36 is disposed outside the both wall portions 22a and 22b in the vicinity of the thickness regulating portions 34b and 34d. Then, it is possible to protect the two wall portions 22a and 22b in the area at the time of interference with peripheral components.

  Furthermore, in the head protection airbag 20 in which the connection port portion 26 is disposed at one end portion (rear end portion in the embodiment) of the airbag body 21 that is long in the front-rear direction, the airbag main body 21 is normally in a state where the deployment and inflation are completed. A plurality of cells are provided in the front-rear direction so as to ensure restraint performance that restrains the occupant to the inside of the vehicle even if it interferes with the occupant moving to the outside of the vehicle by generating a tension along the front-rear direction on the lower edge 21b side. 24, and the attachment portion 30F (see FIG. 1) on one end side (front end side in the embodiment) in the front-rear direction of the airbag body 21 is attached near the lower portion of the pillar portion FP. It is configured.

  And in embodiment, the assembly | attachment attachment part 38 of the reinforcement cloth 36 is attached to the attachment part 11 of the inflator 10 in the back side of the direction away from the attachment part 30F in the connection port part 26, The reinforcement cloth 36 itself is The coupling attachment portion 37 is disposed on the thickness regulating portions 34b and 34d of the expansion region 23c. That is, in the case of the embodiment, the fixing point to the body 1 side of the vehicle V on the connection port portion 26 side in the airbag main body 21 is substantially set by using the assembly attachment portion 38 of the reinforcing cloth 36. The airbag body 21 itself can be shifted from the attachment portion 30B (see FIG. 1) on the body 1 side to the rear portion 38 on the inflator 10 side, and the reinforcing cloth 36 is a stitched portion of the joint attachment portion 37. When the thickness regulating portions 34b and 34d positioned on the lower side inside the airbag body 21 are pulled from the upper edge 21a side of the airbag body 21 to the rear side on the inflator 10 side by 36d and 36c, In the vicinity of the lower edge 21b of the airbag main body 21, a large tension that pulls toward the rear side of the inflator 10 can be generated. It is possible to above.

  In the case of the embodiment, the coupling attachment portion 37 is not only the suture portions 36d and 36c to the thickness regulating portions 34b and 34d but also the suture portion to the peripheral portion 29 as the suture portion to the airbag body 21. Since 36b and 36e are also provided, the attachment strength is improved, and the reinforcing cloth 36 can be stably attached to the airbag body 21 even if the reinforcing cloth 36 generates a large tension.

  In the embodiment, the reinforcing cloth 36 and the inflator 10 are provided with fixing holes 38a and 11a, the rivets 12 are inserted into these fixing holes 38a and 11a, and the mounting attachment portion 38 is attached to the mounting portion of the inflator 10. 11, in addition to the rivet 12, the assembly mounting portion 38 may be configured to be attached to the inflator 10 by inserting fixing means such as a clip or a bolt into the fixing holes 38 a and 11 a, or coupled mounting If the part 37 side can be stopped so as not to move in the direction in which the connection port part 26 is removed, the part 37 may be attached to the inflator 10 by wrapping around the corresponding engaging part of the inflator 10.

  By the way, the reinforcing cloth 36A shown in FIGS. 8 and 9 is obtained by continuing the double-layered reinforcing cloths 36A and 36A on the rear side, and attaching the continuous part as a locking part constituting the attaching part 38A. The assembly attachment portion 38A is attached to the inflator 10 by being wound around the portion 11A.

  Further, the assembly attachment portion 38 of the reinforcing cloth 36 may be attached to the inflator 10 by fastening together with the bolt 13 when the assembly portion 11 is fixed to the bolt 13 when the inflator 10 is attached to the vehicle V.

  Furthermore, in the embodiment, the case where the coupling attachment portion 37 of the reinforcing cloth 36 is coupled to the airbag main body 21 by stitching using the suture thread 40 has been shown. The coupling attachment portion 37 may be attached to 21.

  In addition, in embodiment, although the connection port part 26 of the airbag main body 21 of the head protection airbag 20 was arrange | positioned in the rear end side of the airbag main body 21 corresponding to the arrangement position of the inflator 10, an inflator is In the case of being arranged on the front side of the vehicle, the reinforcing cloth 36 and the like may be exchanged in the front and rear in accordance with the arrangement.

  Moreover, although the case where the reinforcement cloth 36 was arrange | positioned in the vehicle interior / exterior direction both sides of the airbag main body 21 was shown in embodiment, you may arrange | position only in the vehicle inner side or the vehicle outer side.

  Furthermore, as long as the airbag is equipped with a connection port portion that is externally attached to the inflator and connected to the inflator using a clamp, not only the head protection airbag, but also an airbag such as a knee protection airbag device, The present invention can be used, and is not limited to the airbag in which the connection port portion is disposed only on one end side such as the rear end of the airbag body. The present invention can be used for an airbag in which a connection port portion is disposed at an intermediate portion in the vertical direction.

It is the figure seen from the vehicle inner side which shows the mounting state to the vehicle of the head protection airbag apparatus in one Embodiment of this invention. It is an expanded view of the airbag main body and reinforcement cloth used by embodiment. It is a partial front view which shows the attachment state of the airbag main body used in embodiment, a reinforcing cloth, and an inflator. It is a schematic sectional drawing of the IV-IV site | part of FIG. It is a schematic sectional drawing of the VV site | part of FIG. It is a schematic sectional drawing of the VI-VI site | part of FIG. It is a schematic sectional drawing of the VII-VII site | part of FIG. It is a partial front view which shows the attachment state of the airbag main body of another embodiment, a reinforcement cloth, and an inflator. It is a schematic sectional drawing of the IX-IX site | part of FIG.

Explanation of symbols

10 ... Inflator,
11a: fixing hole,
12 ... (fixing means) rivets,
16 ... clamp,
20 ... (head protection) airbag,
21 ... Airbag body,
22: Gas inflow part,
23 (Protective area) Protective expansion part,
26: Connection port,
28 ... non-inflow part,
29 ... peripheral part,
34 (34b, 34d) ... thickness regulating part,
36 / 36A ... Reinforcing cloth,
37 ... coupling attachment part,
38 ... Assembly mounting part,
38a ... fixing hole,
U ... Storage part W1, W2, W3 ... Window,
V ... Vehicle,
M: Head protection airbag device.

Claims (4)

An airbag that is folded and stored in a storage part of a vehicle, flows in inflation gas, protrudes from the storage part, and is inflated and inflated, and an inflator that supplies the inflation gas to the airbag. ,
The airbag is configured to include a cylindrical connection port portion connected to the inflator by being externally mounted on the inflator and tightened by a clamp in order to allow the inflation gas from the inflator to flow in. An airbag device comprising:
The airbag has the connection port portion, and has flexibility for improving the connection strength between the airbag main body that is expanded and inflated by flowing the inflation gas, and the connection port portion and the inflator. A reinforcing cloth, and
The airbag body includes a gas inflow portion that inflates so as to separate the opposing wall portions when inflating gas flows in, and a non-inflow portion that does not allow the inflating gas to flow by connecting the opposing wall portions to each other. ,
The reinforcing cloth includes both end portions arranged at positions facing along the direction of removal from the inflator in the connection port portion sheathed on the inflator, and one end side is connected to the connection port of the airbag body. An air that is disposed as a coupling mounting portion that is coupled to the non-inflow portion at the periphery of the portion, and the other end portion is disposed as an assembly mounting portion that is assembled and fixed to the inflator. Bag device. The air bag is housed on the upper edge side of a vehicle window, with the opposite wall portions of the gas inflow portion being a vehicle inner side wall portion located on the inner side of the vehicle and a vehicle outer side wall portion located on the outer side of the vehicle when deployment is completed. , Configured as a head protection airbag that protrudes downward so as to cover the inside of the window when deployed and inflated,
The connection port is disposed at one end in the front-rear direction of the airbag body that expands and inflates so as to cover the window,
The reinforcing cloth is placed on both sides of the non-inflow portion so as to sandwich the vehicle inside / outside wall portions of the airbag main body when deployed and inflated. The airbag apparatus according to claim 1, wherein the joint attaching portion is formed by sewing together. The non-inflow portion includes a peripheral portion disposed on the outer peripheral edge of the airbag body, and a thickness restricting portion disposed in an inflating region of the airbag body that is on the inner side of the peripheral portion. ,
The coupling attachment portion is formed by being coupled to the thickness regulating portion,
The said reinforcing cloth is arrange | positioned so that the expansion | swelling area | region of the said airbag main body from the vicinity of the said connection port part to the said thickness control part vicinity may be covered. 2. The airbag device according to 2.   2. The assembly attachment portion is attached to the inflator using an adhering means that is inserted into a fixing hole provided in the reinforcing cloth and the inflator and fixes both. The airbag apparatus of any one of thru | or 3 thru | or 3.

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