JP4254679B2 - Airbag device - Google Patents

Description

  The present invention provides an airbag that is attached to a storage part of a vehicle in a state in which the periphery after being folded is covered with a protective cover made of synthetic resin, and that expands and inflates when the inflation gas flows in and protrudes from the storage part. The present invention relates to an airbag device having a configuration.

Conventionally, as a head protection airbag device, a folded airbag is stored on the upper edge side of a window on the vehicle interior side of a vehicle, which is a storage part, with the periphery covered by a synthetic resin cover. There was a thing (for example, refer to patent documents 1).
JP 2002-249015 A (FIGS. 9 to 14)

  However, in the conventional head protection airbag device, the cover covering the folded airbag is for preventing the airbag from collapsing, and covers the entire area of the folded airbag. . And the cover penetrated the attachment piece part for attaching an airbag to the storage site | part side, and was integrated with the folded airbag in that state.

  That is, the conventional cover is integrated with the airbag on the premise that the predetermined portion is separated and opened so that the airbag protrudes when the airbag is deployed and inflated. It did not have to be attached to the storage part site side.

  For this reason, it is difficult to apply the above structure to a protective cover provided for preventing interference with surrounding members in the airbag that is inflated and inflated.

  Of course, as a structure in which the protective cover is attached to the housing part side separately from the airbag, it is inconvenient to handle the protective cover, the airbag, or the like until the airbag device is attached to the vehicle or at the time of attachment.

  The present invention solves the above-described problems, and even if the configuration is such that a protective cover made of a synthetic resin is disposed around a folded airbag, it can be easily integrated before mounting to a vehicle. It is an object of the present invention to provide an airbag device that is easy to handle such as transportation, can be easily attached to a vehicle, and can prevent scattering of a protective cover even during operation after attachment.

An airbag device according to the present invention includes an airbag that is folded and attached to a storage part of a vehicle, and that expands and inflates when the inflation gas flows in, and protrudes from the storage part.
The airbag protrudes from the folded airbag body, and includes an attachment piece portion having an attachment hole for attaching to the storage site,
A pair of sheet metal plates are arranged on the front and back of the mounting piece, and are attached to the mounting piece by caulking so that they are uneven.
The airbag is in a state where the folded airbag body is covered with a protective cover made of synthetic resin, and the mounting plate and the mounting piece provided in the mounting plate are mounted by placing the plate against the storage part. An airbag device configured to be attached to a storage part of a vehicle by a fixing means that passes through a hole,
Protective cover
A cover that covers the folded airbag body;
An insertion hole that is disposed in the cover portion and allows the attachment piece of the airbag to pass therethrough;
A tongue piece that extends from the periphery of the insertion hole and is disposed so as to be sandwiched between the pair of pressing plates when caulking each other between the pressing plates;
A locking protrusion protruding from the tongue piece,
Configured with
A locking hole for locking the locking projection is formed in one of the pair of contact plates.

  In the airbag device of the present invention, the cover piece of the protective cover is disposed around the folded airbag body so that the attachment piece protrudes from the insertion hole, and the tongue piece formed on the periphery of the insertion hole If the locking projections protruding from the part are inserted into the locking holes of one of the abutting plates, the abutting plates are arranged on the front and back of the mounting piece, and they are crimped so as to be uneven, At the same time that the abutment plate is attached to the attachment piece, the protective cover can be easily assembled and integrated with the airbag using the pair of abutment plates. Then, if the abutment plate is applied to the storage part and the abutment plate and the mounting piece are attached to the storage part using the fixing means, the protective cover can be easily attached to the storage part together with the airbag. it can.

  Further, in the airbag device of the present invention, the protective cover holds the tongue piece portion between the contact plates, and locks the locking protrusion protruding from the tongue piece portion into the lock hole formed in one of the contact plates. Since it is a structure, the protective cover assembled | attached to the airbag does not move so that it may shift | deviate largely with respect to an airbag or this board, but can hold | maintain an assembly | attachment state stably. Furthermore, when the airbag body is deployed and inflated, even if a force that detaches the tongue piece from the contact plate acts on the cover portion as the airbag body is inflated, Since the tongue piece portion does not come out between the pair of contact plates, it is possible to prevent the protective cover from being detached and scattered.

  Therefore, in the airbag device of the present invention, even if the protective cover made of synthetic resin is disposed around the folded airbag, it can be easily integrated before mounting on the vehicle and handled such as transportation. Can be easily attached to the vehicle, and the protective cover can be prevented from being scattered during operation after the attachment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the embodiment, a head protection airbag apparatus M as shown in FIG. 1 will be described as an example of an airbag apparatus to which the present invention can be applied. The head protection airbag device M is mounted on the vehicle V shown in FIG. 1, and is provided on the front pillar portion FP and the roof side rail portion RR on the inner edge of the vehicle, the doors W1 and W2, and the rear pillar portion RP. It is attached to the storage part P to be formed. The vehicle V is configured by disposing a center pillar portion CP that extends substantially in the vertical direction between the front pillar portion FP and the rear pillar portion RP.

  As shown in FIG. 1, the head protection airbag device M is a protection that covers the periphery of the inflator 8, the mounting brackets 9, 39, 45, the mounting bolts 10, 42, the airbag 15, and the folded airbag 15. A cover 33 is provided, and the vehicle interior is covered with the airbag cover 13 and stored in the storage portion P when mounted on the vehicle V. In the case of the embodiment, the airbag cover 13 includes a lower edge side portion of the front pillar garnish 4 that covers the vehicle inner side of the front pillar portion FP, a lower edge side portion of the roof head lining 5 that covers the vehicle inner side of the roof side rail portion RR, and Is made up of.

  The front pillar garnish 4 and the roof head lining 5 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. And these lower edge side parts are comprised so that the lower end side can be opened inside a vehicle so that the airbag 15 at the time of deployment inflation can be protruded.

  The inflator 8 has a substantially cylindrical shape, and has a structure in which a gas discharge port (not shown) capable of discharging an inflation gas is disposed on the tip (front end) side. And this inflator 8 inserts the vicinity of the tip including the vicinity of the gas discharge port into the gas inlet portion 19 of the airbag 15, and uses the clamp 11 mounted on the vicinity of the rear end of the gas inlet portion 19. The airbag 15 is connected. The inflator 8 is attached to the inner panel 2 using a mounting bracket 9 for holding the inflator 8 and a mounting bolt 10 for fixing the mounting bracket 9 to the inner panel 2 on the body 1 side. . The inflator 8 is mounted on the vehicle V as an airbag assembly in which the inflator 8 and the airbag 15 are assembled.

  The airbag 15 is a roof side rail that extends from the front pillar portion FP, which is disposed so as to extend obliquely upward in a folded state, to the position above the rear pillar portion RP beyond the center pillar portion CP. It is stored in a storage part P formed in the part RR. In the case of the embodiment, as shown in FIG. 1, the airbag 15 is provided with a protective cover 33 at a portion near the front pillar portion FP in the roof side rail portion RR and a portion on the rear side of the inflator 8. Let it be stored. The airbag 15 is configured to cover the vehicle interior sides of the windows W1 and W2, the center pillar portion CP, and the rear pillar portion RP, as shown by the two-dot chain line in FIG.

  The airbag 15 is folded into the storage part P and stored, and the airbag 15 protrudes from the folded airbag body 16 to attach the airbag 15 to the body 1 side of the vehicle V in the storage part P. In the embodiment, the airbag body 16 and the mounting piece 32 are integrally formed by bag weaving using polyester yarn, polyamide yarn, or the like. Has been.

  The airbag main body 16 includes a gas inflow portion 17 through which the inflation gas G can flow into the interior side wall portion 17a and the vehicle exterior wall portion 17b, and a non-inflow portion through which the inflation gas does not flow. 25.

  In the embodiment, the gas inflow portion 17 includes a gas supply path portion 18, a gas inflow port portion 19, and a protective expansion portion 20. The gas supply path 18 is disposed along the front-rear direction of the vehicle V on the upper edge 16 a side of the airbag body 16. The gas supply path 18 is configured to guide the expansion gas G discharged from the inflator 8 to the protective expansion section 20 disposed below the gas supply path 18. A gas inlet 19 connected to the inflator 8 is disposed at an intermediate portion in the front-rear direction of the portion 18 so as to communicate with the gas supply passage 18 and protrude upward from the airbag body 16. Yes. In the case of the embodiment, the gas inflow port portion 19 is configured by opening the rear end side.

  The protective inflating part 20 is a part that is disposed so as to cover the vehicle inner side of the windows W1 and W2 when the airbag 14 is deployed and inflated, and protects the head of the passenger. The protective inflating portion 20 is disposed so as to cover the vehicle inner side of the window W1 on the side of the front seat when the expansion is completed, and to cover the vehicle inner side of the window W2 on the side of the rear seat. Each of the front side and rear side protection parts 21 and 22 is partitioned by a partition coupling part 28, which will be described later, in the region, respectively, along the vertical direction. A plurality of vertically inflatable portions 23 arranged in parallel are arranged in the front-rear direction.

  The non-inflow portion 35 is configured by combining the vehicle inner wall portion 17a and the vehicle outer wall portion 17b. In the case of the embodiment, the non-inflow portion 35 includes a peripheral joint portion 27, a partition joint portion 28, and a plate-like portion 29. It is configured. The peripheral edge coupling portion 27 is disposed at the outer peripheral edge portion of the airbag body 16 and is disposed so as to surround the periphery of the gas inflow portion 17. Further, a connecting cloth 31 constituting the front end side of the airbag body 16 is connected to the front end of the peripheral edge coupling portion 27.

  The plate-like portion 29 is disposed in a rectangular plate shape below the gas supply path portion 18 between the front-side protection portion 21 and the rear-side protection portion 22. The partition coupling portion 28 is disposed so as to extend from the upper edge side of the peripheral coupling portion 27 and the plate-like portion 29 in the area of each of the front and rear protection portions 21 and 22. These partition coupling portions 28 are disposed to partition the front and rear protection portions 21 and 22 into a plurality of vertical inflating portions 23 and regulate the thickness dimension of the airbag 15 when inflation is completed. Yes.

  There are a plurality of attachment pieces 32 (six in the embodiment) so as to protrude upward from the upper edge side portion of the peripheral edge coupling portion 27 on the upper edge 16a side of the airbag body 16 and the upper edge side of the connecting cloth 31. It is arranged. Attachment brackets 39 and 45 for attaching the airbag 15 to the vehicle body 1 side are attached to the attachment pieces 32 (see FIGS. 1 to 5). Each mounting piece 32 is formed with a mounting hole 32a through which a mounting bolt 42 as an adhering means is inserted, and is mounted using the mounting bolt 42 with the mounting brackets 39 and 45 attached. The brackets 39 and 45 are fixed to the inner panel 2 and the mounting bracket 3 on the body 1 side of the vehicle V. And the attachment piece part 32A arrange | positioned in the site | part in which the protective cover 33 is arrange | positioned is formed so that protrusion height may be larger than the other attachment piece part 32, as shown in FIG. .

  The protective cover 33 protects at least the vehicle exterior O in a part of the folded airbag body 16, and as shown in FIG. 2, the inner panel 2 is used to fix the attachment piece 32A of the airbag 15. In order to protect the airbag 15 from a member such as a mounting bracket 3 made of sheet metal that is separated from the inner panel 2 and protrudes from the inner panel 2 to the vehicle inner side I. In the case of the embodiment, as shown in FIG. 1, the protective cover 33 is disposed at a portion in the vicinity of the front pillar portion FP in the roof side rail portion RR and a portion on the rear side of the inflator 8.

  The protective cover 33 includes a cover portion 34 that covers the folded airbag body 16, an insertion hole 35 through which the attachment piece portion 32 </ b> A of the airbag 15 is inserted, and a tongue piece portion 36 that is formed at the periphery of the insertion hole 35. It is prepared for. The cover part 34 has a substantially U-shaped cross-section and can be covered with the longitudinal direction along the front-rear direction so as to cover the vehicle outer side O of the folded airbag body 16. The insertion hole 35 is formed in a slit shape along the front-rear direction so that the attachment piece portion 32 </ b> A can be inserted in the upper wall portion 34 a disposed above the airbag body 16 in the cover portion 34.

  The tongue piece 36 is formed in a substantially rectangular plate shape that is adjacent to the vehicle inner side I that becomes the periphery of the insertion hole 35 and that extends upward from the upper wall portion 34a. It is set substantially the same as the portion 32A (mounting bracket 39). When the tongue plate portion 36 is disposed on the front and back surfaces of the attachment piece portion 32A with an outer plate portion 40 and an inner plate portion 41 (described later) of the attachment bracket 39, the caulking portion 39a is caulked with the attachment piece portion 32A. This is a portion sandwiched between the plate portion 40 and the inner plate portion 41. Further, the tongue piece portion 36 has a substantially cylindrical locking protrusion 36a that can be locked in a locking hole 41c formed in the inner side plate portion 41. Projecting toward the inner plate 41 side. In the case of the embodiment, the locking protrusion 36 a is disposed at one location near the center of the tongue piece 36.

  The mounting bracket 39 for fixing the mounting piece 32A to the body 1 side of the vehicle V is made of sheet metal. In the case of the embodiment, as shown in FIGS. 2 to 5, the outer shape is substantially the same as the mounting piece 32A. In this configuration, an outer plate 40 and an inner plate 41 are used as a pair of rectangular plates. The outer side plate portion 40 is disposed on the vehicle outer side O of the mounting piece portion 32A, and is configured to cover the vehicle outer side O of the mounting piece portion 32A over substantially the entire area except for the upper edge side. The outer side plate portion 40 is provided with a mounting hole 40a through which the mounting bolt 42 can be inserted corresponding to the mounting hole 32a, and a deformation planned portion 40b which will form a caulking portion 39a on both the left and right sides of the mounting hole 40a. 40b.

  The inner plate portion 41 is disposed on the vehicle inner side I of the attachment piece portion 32A, and includes an attachment hole 41a through which the attachment bolt 42 can be inserted, corresponding to the attachment hole 32a, and both left and right sides of the attachment hole 41a. In addition, it is configured to include the deformation planned portions 41d and 41d that will form the caulking portion 39a. Further, the inner side plate portion 41 is formed in a stepped shape projecting toward the vehicle inner side I so that the lower end side can be disposed with the tongue piece portion 36 of the protective cover 33 between the attachment piece portion 32A. Yes. And the latching hole 41c opened circularly into which the latching protrusion 36a of the tongue piece part 36 can be penetrated is formed in the site | part of this level | step-difference part 41b.

  The mounting bracket 39 has a mounting hole 32 </ b> A and a tongue piece 36 that protrude from the insertion hole 35 of the protective cover 33 between the outer plate 40 and the inner plate 41. By forming the caulking portions 39a and 39a projecting toward the vehicle interior I at the portions of the deformation planned portions 40b and 41d disposed on the left and right sides of 40a and 41a, they are attached to the attachment piece portion 32A. . At the same time, the tongue piece 36 is sandwiched by the mounting bracket 39, and the locking projection 36a is locked to the periphery of the locking hole 41c of the inner plate 41, so that the protective cover 33 is also Attached to the airbag 15 together with the mounting bracket 39.

  Although not shown in the drawing, the mounting bracket 45 disposed on the other mounting piece portion 32 has a substantially rectangular plate shape that is substantially the same as the mounting piece portion 32, and is similar to the mounting plate 39. Are provided with mounting holes 45a through which the mounting bolts 42 can be inserted at positions corresponding to the mounting holes 32a, and the left and right sides of the mounting holes 45a are caulked. It is the structure attached to the attachment piece part 32. FIG.

  Next, the mounting of the airbag apparatus M of the embodiment on the vehicle V will be described. First, the airbag 15 is folded. Specifically, the airbag main body 16 that has been flatly spread is sequentially inserted into a fold C of a mountain fold and a valley fold along the front-rear direction as shown by a two-dot chain line in FIG. The bellows is folded so that the lower edge 16b side of the main body 16 approaches the upper edge 16a side.

  Then, after folding, the airbag is folded in such a way that a predetermined portion of the airbag body 16 is wrapped with a wrapping material (not shown) for preventing collapse, and then the attachment piece 32A is projected from the insertion hole 25. A protective cover 33 is disposed around the main body 16. Next, the mounting brackets 39 and 45 are attached to the mounting pieces 32 and 26A. Further, while using the clamp 11, the inflator 8 is connected to the gas inlet 19 and then the mounting bracket 9 is attached to the periphery of the inflator 8, and the inflator 8 is assembled to the airbag 15 to form an airbag assembly. Keep it.

  Thereafter, the mounting brackets 9, 39, and 45 are arranged in the storage portion P on the vehicle body 1 side, and bolts 9 and 42 are fixed to the inner panel 2 and the mounting bracket 3, and the airbag assembly 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 8, the front pillar garnish 4 and the roof head lining 5 are attached and fixed to the body 1, and further, the rear pillar garnish 7 and the center pillar garnish. If 6 is attached to the body 1, the airbag apparatus M can be mounted on the vehicle V.

  If the inflator 8 is operated after the airbag device M is mounted on the vehicle V, the inflation gas G from the inflator 8 is supplied from the gas inlet 19 to the gas supply path as shown by the two-dot chain line in FIG. It flows in the part 18. Further, the expansion gas G flows from the gas supply path portion 18 into the protective expansion portion 20, and the protective expansion portion 20 begins to expand while eliminating the folding. Then, the airbag body 16 breaks a wrapping material (not shown), and further pushes open the airbag cover 13 constituted by the lower edges of the front pillar garnish 4 and the roof head lining 5, and moves downward from the storage portion P. While projecting, as shown by the two-dot chain line in FIG. 1, the window W <b> 1 and W <b> 2, the center pillar part CP, and the rear pillar part RP are greatly expanded so as to cover the inside of the vehicle.

  In the airbag apparatus M according to the embodiment, the cover portion 34 of the protective cover 33 is disposed around the folded airbag body 16 so that the attachment piece portion 32A protrudes from the insertion hole 35, and is inserted. A locking projection 36a projecting from a tongue piece 36 formed on the inside I of the hole 35 is inserted into the locking hole 41c of the inner plate 41 so that the outer plate If the caulking portion 39a is formed by arranging the portion 40 and the inner side plate portion 41 and caulking them so as to protrude toward the inside of the vehicle at the portions to be deformed portions 40b and 41d, the mounting bracket 39 is attached to the mounting piece portion. Simultaneously with the attachment to 32A, the protective cover 33 can be easily assembled to the airbag 15 using the attachment bracket 39 and integrated. Then, the outer plate portion 40 is applied to the mounting bracket 3 in the storage portion P, and the mounting bolt 42 as a fixing means is inserted into the insertion holes 26a, 40a, 41a and screwed into the nut 3a fixed to the mounting bracket 3. If they are combined, the mounting bracket 39 and the mounting piece 32A can be mounted on the mounting bracket 3, and the protective cover 33 can be easily mounted together with the airbag 15 on the mounting bracket 3 constituting the storage part P. Can do.

  Further, in the airbag apparatus M of the embodiment, the protective cover 33 holds the tongue piece portion 36 between the outer plate portion 40 and the inner plate portion 41, and the locking projection 36a protruding from the tongue piece portion 36 is provided. The protective cover 33 assembled to the airbag 15 moves so as to be largely displaced with respect to the airbag 15 and the mounting bracket 39 because it is configured to be engaged with the engagement hole 41c formed in the inner side plate portion 41. Without attaching, the assembled state can be stably maintained. Further, when the airbag body 16 is deployed and inflated, even if a force that causes the tongue piece portion 36 to be detached from the mounting bracket 39 acts on the cover portion 34 as the airbag body 16 is inflated, the locking projection 36a is locked to the periphery of the locking hole 41c, and the tongue piece portion 36 does not come out between the outer plate portion 40 and the inner plate portion 41 of the mounting bracket 39, so that the protective cover 33 may come off and scatter. Can be suppressed.

  Therefore, in the airbag apparatus M of the embodiment, even if the protective cover 33 made of synthetic resin is disposed around the folded airbag 15, it can be easily integrated before being attached to the vehicle V. Handling such as transportation is convenient, it can be easily attached to the vehicle V, and further, the protective cover 33 can be prevented from being scattered during operation after the attachment.

  In the embodiment, the protective cover 33 partially covers the periphery of the folded airbag body 16, but, of course, as the protective cover, covers the entire area of the folded airbag body. May be used.

  In the embodiment, the head protection airbag device is described as an example. However, the airbag device to which the present invention can be applied is not limited to this. For example, the head airbag device can be applied to a side airbag device or the like. The invention may be applied.

It is the schematic front view which looked at the head protection airbag apparatus which is one Embodiment of this invention from the vehicle inside. It is a general | schematic expanded sectional view of the II-II site | part of FIG. It is a partial expanded front view of the airbag assembly | attachment body in the head protection airbag apparatus of embodiment. It is a schematic sectional drawing of the IV-IV site | part of FIG. It is a disassembled perspective view which shows this board and a protective cover in the head protection airbag apparatus of embodiment. It is a front view showing the state where the air bag used for the head protection air bag device of an embodiment was developed flat.

Explanation of symbols

1 ... Body
2 ... Inner panel,
3 ... Mounting bracket,
8 ... Inflator,
13 ... Airbag cover,
15 ... Airbag,
16 ... airbag body,
32.32A ... Mounting piece,
32a ... mounting hole,
33 ... Protective cover
34 ... cover part,
35 ... insertion hole,
36 ... tongue part,
36a ... locking protrusion,
39.45 ... Mounting bracket,
39a ... caulking part,
40 ... Outer plate part (this plate),
40a ... mounting hole,
41 ... inner side plate part (this board),
41a ... mounting hole,
41c ... locking hole,
42 ... Mounting bolt (fixing means),
P: Storage part,
V ... Vehicle,
M: Head protection airbag device.

Claims (1)

Folded and attached to the storage part of the vehicle, equipped with an airbag that expands and inflates when the inflation gas flows in and protrudes from the storage part,
The airbag protrudes from the folded airbag body and includes an attachment piece portion having an attachment hole for attaching to the storage part,
A pair of contact plates made of sheet metal are arranged on the front and back of the attachment piece part, and attached to the attachment piece part by caulking so as to give unevenness to each other,
The airbag is in a state where the folded airbag body is covered with a protective cover made of synthetic resin, and the abutting plate is applied to the housing part, and an attachment hole provided in the abutting plate; An airbag device configured to be attached to the storage portion of the vehicle by a fixing means that is inserted through the attachment hole of the attachment piece portion,
The protective cover is
A cover portion covering the airbag body folded;
An insertion hole disposed in the cover portion, through which the attachment piece portion of the airbag is inserted;
A tongue piece that extends from the periphery of the insertion hole and is disposed so as to be sandwiched between a pair of the abutting plates when caulking the abutting plates;
A locking projection protruding from the tongue piece,
Configured with
An airbag device, wherein a locking hole for locking the locking protrusion is formed in one of the pair of the abutting plates.

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