JP2019085035A - Side air-bag device - Google Patents

Abstract

To stably expand an air-bag.SOLUTION: A base member 4 of a side air-bag device 1 includes a wire frame 10. The wire frame 10 has: an outside wire frame 11 which is positioned on a longitudinal direction outer side of a vehicle body with respect to an air-bag 2; an inside wire frame 12 which is positioned on a longitudinal direction inner side of the vehicle body with respect to the air-bag 2; a rear side wire frame 13 which is positioned on a longitudinal direction rear side of a seat with respect to the air-bag 2, and connects the outside wire frame 11 and the inside wire frame 12; at least one cross-linkage part 14 which is so located as to be spaced forward from the rear side wire frame 13, and connects the outside wire frame 11 and the inside wire frame 12. In at least one of the cross-linkage parts 14, left and right outer side end parts are fixed to left and right inner side faces of the outside wire frame 11, and left and right inner side end parts are fixed to left and right outer side faces of the inside wire frame 12.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a side airbag device disposed between a vehicle body and a seat.

A side airbag device is known which is provided between a seat of a vehicle and a side wall of a vehicle and which is deployed toward the side of an occupant in the event of a side collision of the vehicle. The side airbag device has an inflator that ejects a gas for expanding the airbag. In general, the inflator integrally has a bolt, which is directed to the rear of the seat and fixed to a mounting portion of a vehicle body or a seat frame on the rear side of the inflator (see, for example, Patent Document 1).
In the side airbag device of Patent Document 1, the module case for accommodating the inflator and the airbag has an inner portion and an outer portion extending forward so as to surround the left and right sides of the inflator.

Patent No. 5408360 gazette

  However, the inner side and the outer side of the module case may spread out and be deformed to the left and right outside when the airbag is deployed, which may affect the deployment direction of the airbag.

Then, an object of the present invention is to develop an airbag stably.
Another object of the present invention is to make the side airbag device compact.

The present invention for solving the above problems is a side airbag device disposed between a vehicle body and a seat, which accommodates an airbag, an inflator for supplying gas into the airbag, an airbag and an inflator, A side airbag device includes a base member fixed to a vehicle body and a skin member covering at least the front side of the base member to form a front cabin surface.
In this side airbag device, the base member comprises a wire frame made of a metal rod.
The wire frame includes an outer side wire frame which constitutes at least a part of an outer side portion located on the outer side in the left-right direction of the vehicle with respect to the airbag, and at least a portion of an inner portion located on the inner side in the left-right direction of the vehicle , An inner wire frame which is located behind the air bag in the front-rear direction of the seat and which connects the outer wire frame and the inner wire frame, and which is spaced forward from the rear wire frame And at least one bridge connecting the outer wire frame and the inner wire frame.
And at least one of the bridge portions is fixed to the left and right inner surfaces of the outer wire frame at the left and right outer ends, and is fixed to the left and right outer surfaces of the inner wire frame at the left and right inner ends.

According to such a configuration, since the base member has the bridge portion connecting the inner wire frame and the outer wire frame, the inner portion and the outer portion are suppressed from spreading and deforming in the left and right direction. Thereby, the airbag can be deployed stably.
Then, at least one of the bridging portions is fixed to the left and right inner surfaces of the outer wire frame and at least one of the left and right inner ends is fixed to the left and right outer surfaces of the inner wire frame. The wire frame and the inner wire frame can be firmly connected in a short distance.

  In the side airbag device described above, the bridge portion may include a first bridge portion connecting the upper portion of the outer wire frame and the upper portion of the inner wire frame. Also, the bridge portion may include a second bridge portion connecting the lower portion of the outer wire frame and the lower portion of the inner wire frame.

  When the upper and lower portions of the outer wire frame and the inner wire frame are connected by the first bridge portion and the second bridge portion, deformation of the base member can be further suppressed.

  In the above-described side airbag device, the inflator has a cylindrical main body and a bolt provided to project from the main body, and the bridge is located farther from the cabin surface than the center of the main body. Is desirable.

  Thus, the airbag is less likely to be caught by the bridging portion when the airbag is deployed from the cabin surface to the vehicle compartment by positioning the bridging portion farther from the cabin surface than the center of the main body of the inflator, The airbag can be deployed stably.

  The side airbag device can further include an attachment bracket having an inflator fixing portion to which the inflator is fixed and a base member fixing portion which is disposed at a position different from the inflator fixing portion and fixed to the base member. . The inflator fixing portion preferably has an inflator fixing hole through which a bolt of the inflator passes, and the bridge portion is preferably located farther from the cabin surface than the inflator fixing hole.

  According to such a configuration, the airbag is less likely to be caught by the bridging portion when the airbag is deployed from the cabin surface into the vehicle compartment by locating the bridging portion farther from the cabin surface than the inflator fixing hole. , The airbag can be deployed stably.

  Further, it is preferable that the bridge portion be located farther from the cabin surface than the entire main body portion.

  As described above, when the bridging portion is located farther from the cabin surface than the entire main body portion, the airbag is less likely to be caught by the bridging portion when the airbag is deployed from the cabin surface to the cabin, and the airbag is Can be stably developed.

  In the above-described side airbag device, the base member includes a wire frame made of a metal rod, and the wire frame forms an outer wire frame which constitutes at least a part of the outer side, and at least a part of the inner side. The inner wire frame may be included, and the bridge portion may be configured to connect the outer wire frame and the inner wire frame.

  According to such a configuration, by configuring the base member with the wire frame, the rigidity of the base member can be easily increased, so that the side airbag device can be configured compactly.

  According to the present invention, the airbag can be deployed stably.

  Further, according to the present invention, the side airbag device can be configured to be compact.

It is the figure which looked at the vehicle in which the side airbag apparatus was provided from the vehicle interior. It is a perspective view of the side panel of the vehicle body to which a side airbag apparatus and a side airbag apparatus are fixed. It is the perspective view which looked at the side airbag apparatus from the side panel side. It is an exploded perspective view of a side air bag device. It is the perspective view which looked at the base member from the left-right inside of the vehicle body. It is the perspective view which looked at the base member from the left-right outer side of the vehicle body. It is a horizontal sectional view of a side airbag device. It is the figure which looked at the side airbag apparatus from right and left inside. (A) illustrates fixing of the outer wire frame and the inner wire frame to the bridge, (b) shows a desirable fixing range of the outer wire frame, and (c) shows a desirable fixing range of the inner wire frame is there.

  Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. As shown in FIG. 1, the side airbag device 1 is mainly applied to a rear seat of a car, and is disposed between a seat S and a side wall BS and a door BD which are a part of a vehicle body and the seat S. Be done.

  The seat S has a seat cushion S1 and a seat back S2, and the seat back S2 is pivotable so as to tilt forward with the lower end as an axis. The side airbag device 1 is fixed to the side wall BS and is not fixed to the seat back S2. For this reason, although illustration is omitted, when the seat back S2 is turned forward, the side airbag device 1 is exposed in a state where it remains on the side wall BS. The front surface of the side airbag device 1 is substantially flush with the front surface of the seat back S2, and at the time of normal use of the seat S, it is a part of the seat back S2. In the present embodiment, although the side airbag device 1 disposed on the left side of the vehicle body (left side of the seat S) will be described, the side airbag device having a symmetrical configuration may be provided on the right side of the vehicle body. it can. Further, in the present embodiment, unless otherwise noted, the inside and the outside in the left-right direction are not based on the side airbag device 1 itself but on the basis of the vehicle body. That is, the side closer to the left and right center of the vehicle body is the inside, and the side farther from the left and right center of the vehicle body is the outside. Moreover, the front-back direction is based on the sheet | seat S unless there is particular notice.

  As shown in FIG. 2, the side wall BS has a side panel 200 inside, and the side airbag device 1 is fixed to the side panel 200.

The side panel 200 has a first mounting hole 211 on the surface facing inward and leftward and a second mounting hole 212 on the surface facing forward as an attaching portion 210 for fixing the side airbag device 1. The first attachment holes 211 and the second attachment holes 212 are respectively provided two by two vertically aligned.
In addition, the side panel 200 has tool holes 215 for passing a tool for attaching the side airbag device 1 on the surfaces facing inward and leftward. Two tool holes 215 are provided side by side vertically.

  As described above, since the front side, the left and right inner side, and the upper side are exposed when the seatback S2 is folded forward, the side airbag device 1 is covered with the skin member 7 on each of these surfaces. Thus, in the side airbag device 1, the front surface compartment surface 1 </ b> A, the left and right inner side surfaces 1 </ b> B, and the top surface 1 </ b> C are configured by the skin member 7.

  In addition, as shown in FIG. 3, the skin member 7 is wound around the side airbag device 1 from the front side to the left and right outside, and extends a little to the rear side. Thereby, the skin member 7 constitutes the outside surface 1D.

As shown in FIG. 4, the side airbag device 1 is configured to include an airbag 2, an inflator 3, a base member 4, and a mounting bracket 30.
As known, the air bag 2 is a member that is filled with gas, expanded, and deployed at the time of a collision of a vehicle.

  The inflator 3 is a member that supplies a gas into the airbag 2. The inflator 3 has a cylindrical main body 3A and a bolt 3B provided so as to protrude from the main body 3A. A plurality of, in this case, two, bolts 3B are provided side by side along the axial center of the main body 3A, and each bolt 3B is fixed to the main body 3A so as to face the axial center of the main body 3A. .

  The base member 4 is a member that accommodates the airbag 2 and the inflator 3 and is fixed to the vehicle body, here, the side panel 200. Although not shown in FIG. 4, the base member 4 is covered by the cushion pad 6 (see FIG. 7), and the skin member 7 covers the outside of the cushion pad 6. That is, the skin member 7 covers at least the front side of the base member 4.

As shown in FIGS. 5 and 6, the base member 4 comprises a wire frame 10 and a guide plate 20.
The wire frame 10 is formed of a bent metal rod and includes an outer wire frame 11, an inner wire frame 12, a rear wire frame 13, and a bridge portion 14. An inner space surrounded by these portions is a housing space 51 for housing the airbag 2 and the inflator 3.

  The guide plate 20 is made of a metal plate and includes a first guide plate 21 fixed to the outer wire frame 11 and a second guide plate 22 fixed to the inner wire frame 12.

  The outer wire frame 11 has a front edge 11A extending in the vertical direction, an upper edge 11B bending and extending backward from the upper end of the front edge 11A, and a bending and extending backward from the lower end of the front edge 11A. , A lower edge 11C extending obliquely upward to the rear, a rear edge 11D bent and extended downward from the rear end of the upper edge 11B, and connected to the lower edge 11C, an upper edge 11B and a lower edge And a vertically extending skin engaging portion 11F connecting the portion 11C. The rear edge portion 11D has a step shape in which the lower portion is shifted to the front side more than the upper portion. In addition, each connection part which comprises the wire frame 10 is connected by welding.

To the outer wire frame 11, first fixing plates 15A and 15B made of a metal plate for fixing the outer wire frame 11 to the side panel 200 are fixed by welding.
The first fixing plate 15A is fixed to the upper edge 11B and the rear edge 11D by welding. The first fixing plate 15B is disposed below the first fixing plate 15A and fixed to the rear edge 11D by welding. Describing the fixation of the first fixation plates 15A and 15B in more detail, the first fixation plates 15A and 15B are each formed in a substantially rectangular shape. The outer wire frame 11 has two adjacent sides of the first fixed plate 15A, specifically, L-shaped portions 11X along the upper side and the rear side, and two adjacent sides of the first fixed plate 15B, Specifically, it has an L-shaped portion 11Y along the lower side and the rear side. The L-shaped portion 11X is fixed to the first fixing plate 15A at two welds W1 on two sides of the first fixing plate 15A. Further, the L-shaped portion 11Y is fixed to the first fixing plate 15B at two welded portions W2 on two sides of the first fixing plate 15B. Thus, by fixing the L-shaped portions 11X and 11Y to two sides of the first fixing plates 15A and 15B, respectively, the rigidity around the first fixing plates 15A and 15B can be increased. The side airbag device 1 can be firmly fixed to the vehicle body.
A nut N1 is fixed to each first fixing plate 15A, 15B inside in the left-right direction by welding. Although a code | symbol is abbreviate | omitted, the through-hole corresponding to the nut N1 is formed in 1st fixed plate 15A, 15B.
The outer wire frame 11, the first guide plate 21, and the first fixing plates 15 </ b> A and 15 </ b> B are outer portions located on the outer side in the left-right direction of the vehicle body with respect to the airbag 2. That is, the outer wire frame 11 constitutes at least a part of the outer portion. Further, the outer side portion has a nut N1 of the first fixing plate 15A, 15B as an outer fixing portion fixed to the vehicle body.

  The skin hooking portion 11F is a portion provided at the end of the skin member 7 and to which a hook 7A (see FIG. 7) as a hooking member for fixing the skin member 7 is hooked. It is located on the opposite side of the accommodation space 51 across the first guide plate 21.

  The inner wire frame 12 bends and extends rearward from the lower end of the front edge 12A, and extends from the lower end of the front edge 12A, and the upper edge 12B bends and extends backward from the upper end of the front edge 12A. A lower edge 12C extending obliquely upward to the rear, and a rear edge 12D bent downward from the rear end of the upper edge 12B and connected to the lower edge 12C.

  To the inner wire frame 12, third fixing plates 16A and 16B made of a metal plate for fixing the mounting bracket 30 are fixed by welding. The third fixing plate 16A is fixed to the rear edge 12D by welding. The third fixed plate 16B is disposed below the third fixed plate 16A and fixed to the rear edge 12D by welding. Describing the fixation of the third fixation plates 16A and 16B in more detail, the third fixation plates 16A and 16B are each formed in a substantially rectangular shape. The inner wire frame 12 is adjacent to the U-shaped portion 16X along the three sides of the third fixed plate 16A, specifically the upper side, the rear side and the lower side, and the third fixed plate 16B. It has two sides, specifically, an L-shaped portion 16Y along the upper side and the rear side. The U-shaped portion 16X is fixed to the third fixing plate 16A at three welds W3 on three sides of the third fixing plate 16A. The L-shaped portion 16Y is fixed to the third fixing plate 16B at two welds W4 on two sides of the third fixing plate 16B. In this manner, the U-shaped portion 16X is fixed to three sides of the third fixed plate 16A, and the L-shaped portion 16Y is fixed to two sides of the third fixed plate 16B, whereby the third fixed plates 16A and 16B are formed. The rigidity of the periphery of the housing can be increased, and the mounting bracket 30 can be firmly fixed to the base member 4.

A nut N2 is fixed by welding to the third fixed plates 16A and 16B on the inner side in the left-right direction. The rear edge portion 12D has a serpentine shape in which the portion to which the third fixed plates 16A and 16B are fixed protrudes rearward. Although a code | symbol is abbreviate | omitted, the through-hole corresponding to the nut N2 is formed in 3rd fixed plate 16A, 16B.
The inner wire frame 12, the second guide plate 22, and the third fixed plates 16 </ b> A and 16 </ b> B are inner portions located inside the vehicle 2 in the left-right direction with respect to the airbag 2. That is, the inner wire frame 12 constitutes at least a part of the inner portion. The base member 4 has a nut N2 as a bracket fixing portion to which the mounting bracket 30 is fixed on the lateral side.

  The rear wire frame 13 includes an upper connection frame 13A and a lower connection frame 13B.

The upper connection frame 13 A is formed of a bent metal rod, and each end is connected to the upper portion of the rear edge 11 D of the outer wire frame 11 and the upper portion of the rear edge 12 D of the inner wire frame 12. A second fixing plate 17A made of a metal plate for fixing the upper connecting frame 13A to the side panel 200 is fixed to the upper connecting frame 13A by welding.
Describing in more detail the fixation of the second fixing plate 17A, the second fixing plate 17A is formed in a substantially rectangular shape. The upper connecting frame 13A has a U-shaped portion 13X along three sides of the second fixed plate 17A, specifically the outer side, the upper side and the inner side. The U-shaped portion 13X is fixed to the second fixing plate 17A at three welds W5 on three sides of the second fixing plate 17A. In this manner, by fixing the U-shaped portion 13X to the three sides of the second fixed plate 17A, the rigidity around the second fixed plate 17A can be increased, and the side airbag device 1 is firmly fixed to the vehicle body. And can be fixed.
A nut N3 as a rear side fixing portion is fixed to the second fixing plate 17A at the front side by welding.

The lower connection frame 13 B is formed of a bent metal rod, and each end is connected to the lower portion of the rear edge 11 D of the outer wire frame 11 and the lower portion of the rear edge 12 D of the inner wire frame 12. A second fixing plate 17B made of a metal plate for fixing the lower connecting frame 13B to the side panel 200 is fixed to the lower connecting frame 13B by welding. Describing the fixation of the second fixation plate 17B in more detail, the second fixation plate 17B is formed in a substantially rectangular shape. The lower connecting frame 13B has a U-shaped portion 13Y along three sides of the second fixed plate 17B, specifically, the outer side, the upper side, and the inner side. The U-shaped portion 13Y is fixed to the second fixing plate 17B at three welds W6 on three sides of the second fixing plate 17B. In this manner, by fixing the U-shaped portion 13Y to the three sides of the second fixing plate 17B, the rigidity around the second fixing plate 17B can be increased, and the side airbag device 1 is firmly fixed to the vehicle body. And can be fixed.
A nut N3 as a rear side fixing portion is fixed to the front side by welding on the second fixing plate 17B. Although a code | symbol is abbreviate | omitted, the through-hole corresponding to the nut N3 is formed in 2nd fixed plate 17A, 17B.

The rear wire frame 13, the second fixing plates 17A and 17B, and the nut N3 correspond to the rear side portion that is located on the rear side in the front-rear direction of the seat with respect to the airbag and that connects the inner portion and the outer portion.
The nut N1 as the outer fixing portion is located closer to the cabin surface 1A than the nut N3 as the rear fixing portion.

  The bridge portion 14 is made of a metal rod and includes a first bridge portion 14A and a second bridge portion 14B.

The first bridge portion 14 A connects the upper edge 11 B at the top of the outer wire frame 11 and the upper edge 12 B at the top of the inner wire frame 12.
Specifically, as shown in FIG. 9A, the left and right outer end portions of the first bridge portion 14A are fixed to the left and right inner surfaces of the outer wire frame 11 by the weld portion W, and the first bridge portion 14A is fixed. The left and right inner end portions are fixed to the left and right outer surfaces of the inner wire frame 12 by welds W. In the present embodiment, as an example, the outermost wire frame 11 and the first cross-linked portion of the first bridge portion 14A are brought into contact with or in proximity to each other, so that the outer wire frame 11 and the first bridge are cross-linked. The part 14A is fixed. Further, the inner wire frame 12 and the first bridge portion 14A are fixed in such a manner that the left and right outer portion of the inner wire frame 12 and the innermost portion of the first bridge portion 14A are in contact with or close to each other. .

The second bridge portion 14 B connects the lower edge 11 C at the lower portion of the outer wire frame 11 and the lower edge 12 C at the lower portion of the inner wire frame 12.
Specifically, the left and right outer end portions of the second bridge portion 14B are fixed to the left and right inner surfaces of the outer wire frame 11 by the weld portion W, and the left and right inner end portions of the second bridge portion 14B are inner wire It is being fixed to the surface on the right-and-left outside of frame 12 by welding part W. In the present embodiment, as an example, the outermost wire frame 11 and the second bridge portion 14B are brought into contact with or in proximity to the innermost portion of the outer wire frame 11 and the innermost portion of the second bridge portion 14B. 14B is fixed. Further, the inner wire frame 12 and the second bridge portion 14B are fixed such that the left and right outer portions of the inner wire frame 12 and the innermost portion of the second bridge portion 14B are in contact with or close to each other.

  Here, the left and right inner surfaces of the outer wire frame 11 are surfaces on the left and right inner side of the vertical surface 11V passing through the center 11E of the outer wire frame 11, and are surfaces of portions indicated by the range A1. Further, the left and right outer surfaces of the inner wire frame 12 are surfaces on the left and right outer sides of the vertical surface 12V passing through the center 12E of the inner wire frame 12, and are surfaces of portions indicated by the range A2. In these ranges, the outer wire frame 11 is fixed by fixing the left and right outer ends of the bridge portion 14 and the inner wire frame 12 is fixed by fixing the inner left and right ends of the bridge portion 14. And the inner wire frame 12 can be firmly connected by the bridge portion 14 in a short distance.

  Note that, in order to make the bridge portion 14 connect the outer wire frame 11 and the inner wire frame 12 more firmly, the outside of the left and right inner surfaces of the outer wire frame 11 shown in FIG. Fix the surface of the part within 45 ° vertically (see range A3 in the figure) with respect to the horizontal plane 11H passing through the center 11E of the wire frame 11 and the left and right outer end of the bridge portion 14, as shown in FIG. Of the left and right outer surfaces of the inner wire frame 12, the surface of a portion within 45 ° up and down with respect to the horizontal plane 12H passing through the center 12E of the inner wire frame 12 (see range A4 in the figure) and the left and right inner end of the bridge portion 14 It is desirable to fix

  The first bridge portion 14A and the second bridge portion 14B are spaced apart forwardly with respect to the rear side.

The first guide plate 21 described above is provided to extend up and down along the front edge 11A of the outer wire frame 11 (outside portion), and is welded to the front edge 11A, the upper edge 11B and the lower edge 11C. It is fixed by. The first guide plate 21 is located on the accommodation space 51 side with respect to the front edge 11A, the upper edge 11B, and the lower edge 11C.
Further, the first guide plate 21 is provided from the upper edge 11B to the lower edge 11C, that is, from the upper end to the lower end of the outer side. An upper end portion of the first guide plate 21 is fixed by welding to the upper edge portion 11B by a welding portion 21B, and a lower end portion is fixed by welding to a lower edge portion 11C by a welding portion 21C. In addition, the first guide plate 21 is fixed by welding to the front edge 11A of the outer wire frame 11 by three welds 21D at the front edge. Three welds 21D are arranged side by side vertically. For this reason, the front edge of the first guide plate 21 is fixed along the front edge 11A of the outer wire frame 11.

  Furthermore, the first guide plate 21 has a flange 21A at the rear end portion that extends outward in the left-right direction of the vehicle body. The flange 21A is a portion for abutting against the side panel 200 and suppressing the deformation of the outer portion when the outer portion is pushed outward in the left-right direction by the deployment force of the airbag 2. In the present embodiment, as shown in FIG. 7, the airbag 2 is in contact with the side panel 200 before the airbag 2 is deployed.

The second guide plate 22 is provided to extend up and down along the front edge 12A of the inner wire frame 12 (inner part), and fixed by welding to the front edge 12A, the upper edge 12B and the lower edge 12C. It is done. The second guide plate 22 is disposed on the accommodation space 51 side with respect to the front edge 12A, the upper edge 12B, and the lower edge 12C.
The second guide plate 22 is provided from the upper edge 12B to the lower edge 12C, that is, from the upper end to the lower end of the inner portion. The upper end portion of the second guide plate 22 is fixed by welding to the upper edge portion 12B by a welding portion 22B, and the lower end portion is fixed by welding to a lower edge portion 12C by a welding portion 22C. Further, the second guide plate 22 is fixed by welding to the front edge 12A of the inner wire frame 12 by three welds 22D at the front edge. Three welds 22D are arranged side by side vertically. For this reason, the front edge of the second guide plate 22 is fixed along the front edge 12A of the inner wire frame 12.
The second guide plate 22 is disposed in parallel to the first guide plate 21. For this reason, since the first guide plate 21 and the second guide plate 22 can receive the deployment force of the airbag 2 substantially equally, the rigidity of the base member 4 can be effectively improved.

  The mounting bracket 30 is a member for mounting the inflator 3 to the base member 4 and is made of a metal plate. As shown in FIG. 4, the mounting bracket 30 includes an inflator fixing portion 31 to which the inflator 3 is fixed, and a base member fixing portion 32 which is disposed at a position different from the inflator fixing portion 31 and fixed to the base member 4; The inflator fixing portion 31 and the connecting portion 33 connecting the base member fixing portion 32 are provided. The base member fixing portion 32 is provided to extend rearward from the upper and lower portions of the connecting portion 33.

As shown in FIG. 7, the inflator fixing portion 31 and the base member fixing portion 32 have a flat plate shape extending in the front-rear direction. The inflator fixing portion 31 is located closer to the center C1 of the base member 4 in the left-right direction than the base member fixing portion 32. The center C1 of the base member 4 in the left-right direction is a plane equidistant from the front edges 11A and 12A of the base member 4 in the left-right direction.
The connecting portion 33 has a flat plate shape that obliquely connects the rear end of the inflator fixing portion 31 and the front end of each base member fixing portion 32.
The inflator fixing portion 31 is located closer to the cabin surface 1A than the base member fixing portion 32, that is, in front of the same. Further, the base member fixing portion 32 is located farther from the cabin surface 1A than the inflator 3 is.

Returning to FIG. 4, the inflator fixing portion 31 has two inflator fixing holes 31A through which a plurality of, in this case, two bolts 3B of the inflator 3 penetrate.
Further, the base member fixing portion 32 has two (plural) base member fixing holes 32A through which a plurality of fastening members, in this case, two bolts B1 respectively penetrate.

The inflator 3 is fixed to the base member 4 via the mounting bracket 30.
Specifically, as shown in FIG. 7, the inflator 3 is disposed inside the air bag 2, and the air bag 2 is surrounded by a webbing 5 that regulates the deployment direction of the air bag 2 (FIG. 5). See also). The webbing 5 has its front ends joined to the skin member 7 and functions to assist tearing of the cushion pad 6 when the air bag 2 is deployed.
The bolt 3B of the inflator 3 penetrates the air bag 2 and the webbing 5, the reinforcing plate 8 made of resin, and the inflator fixing hole 31A. The mounting bracket 30 is fixed to the inflator 3 by engaging the nut N4 with the bolt 3B. Thus, the bolt 3B is disposed so as to project from the main body 3A toward the inside in the left-right direction of the vehicle body.

The base member fixing portion 32 of the mounting bracket 30 is fixed to the third fixing plates 16A and 16B by passing the bolt B1 through the base member fixing hole 32A and engaging with the nut N2. Thus, the mounting bracket 30 is fixed to the inner side of the base member 4. In addition, the inflator 3 is fixed to the inner side together with the airbag 2.
The aforementioned tool hole 215 is disposed at a position facing the bolt B1 and the nut N2 in the left-right direction, and a tool such as a hex socket wrench can be passed through the tool hole 215 from the outside of the side panel 200 to tighten the bolt B1. It is possible.

  Here, when the inflator fixing portion 31 is closer to the center in the left-right direction of the base member 4 than the base member fixing portion 32, a gap is easily formed between the inflator fixing portion 31 and the cushion pad 6. Therefore, it is easy to arrange the nut for fixing the bolt 3B of the inflator 3 on the right side of the inflator fixing portion 31 (the opposite side of the inflator fixing portion 31 to the center C1 of the base member 4 in the left-right direction). In particular, when the cushion pad 6 is integrally formed on the base member 4, the cushion pad 6 is more likely to enter the center side of the base member 4 than the inner wire frame 12, but even in such a case, a gap is secured. It is easy to arrange the nut N4.

  The hook 7A is fixed to an end portion of the outer skin member 7 on the outer side in the left-right direction. The hook 7A is hooked to the skin hooking portion 11F. Moreover, the hook 7B is being fixed to the edge part of the skin member 7 inside the left-right direction. The skin member 7 has an end on the inner side in the left-right direction extending to the rear end of the right side surface of the cushion pad 6 and goes around the rear side of the base member 4 and is latched on the second fixing plates 17A and 17B. .

A bolt B2 passing through the first mounting hole 211 from the outside of the side panel 200 is fastened to the nut N1 of the base member 4. Thus, the nut N1 which is the outer fixing portion of the outer portion is fixed to the side panel 200.
Further, a bolt B3 passing through the second attachment hole 212 from the outside of the side panel 200 is fastened to the nut N3. Thereby, the nut N3 which is the rear side fixing portion of the rear side portion is fixed to the side panel 200.
Thus, the base member 4 is fixed to the side panel 200 by the bolt B1 as a fastening member whose axis is directed in the left-right direction and the bolt B3 as a fastening member directed in the front-rear direction. That is, since the outer fixing portion and the rear fixing portion of the base member 4 are fixed to the side panel 200 by a plurality of fastening members whose axes are different from each other, the side airbag device 1 is stable on the vehicle body. It is fixed.

  The front surface of the rear side, for example, the front surface of the second fixed plate 17A, has a portion separated from the inflator by 3 cm or more in the direction perpendicular to the cabin surface 1A. For example, the distance D1 between the position of the rearmost part of the inflator 3 and the position of the foremost part of the second fixed plate 17A is 3 cm or more. Thus, a space is provided between the front surface of the rear side and the inflator 3 so that the air bag can enter when the air bag is deployed.

  As shown in FIG. 8, the first cross-linked portion 14A and the second cross-linked portion 14B are located farther from the cabin surface 1A than the center C2 of the main body 3A of the inflator 3, that is, behind. Further, the first cross-linking portion 14A and the second cross-linking portion 14B are located farther from the cabin surface 1A than the inflator fixing hole 31A. Furthermore, the second bridge portion 14B is located farther from the cabin surface 1A, that is, behind the entire main body 3A of the inflator 3. That is, at least one of the bridging portions 14 is located farther from the cabin surface 1A than the entire main body portion 3A. In addition, it is desirable that the first bridge portion 14A is also located farther from the cabin surface 1A than the entire main body portion 3A.

Here, a method of manufacturing the side airbag device 1 will be briefly described.
First, the side airbag device 1 creates the base member 4 by welding, inserts the base member 4 into a mold, and integrally forms the cushion pad 6. Then, the inflator 3 is fixed to the mounting bracket 30 and accommodated inside the base member 4. Further, the skin member 7 is covered on the cushion pad 6, and the hook 7A is hooked on the skin hooking portion 11F, and the hook 7B is hooked on the second fixing plates 17A and 17B.
Next, the base member 4 is fixed to the side panel 200 by bolts B2 and B3. Then, the inflator 3 to which the mounting bracket 30 is fixed is fixed to the base member 4. Specifically, the mounting bracket 30 is engaged with the nut N 2 by the bolt B 1 to fix the mounting bracket 30 to the base member 4. At the time of fastening of the bolt B1, the tool is passed through the tool hole 215 as described above.

  According to such a manufacturing method, even after the base member 4 is surrounded by the cushion pad 6 by integrally molding the cushion pad 6 with the base member 4, the inflator 3 to which the mounting bracket 30 is fixed is used as the base member 4. The inflator 3 can be easily fixed to the base member 4 by attaching it to the

The operation and effects of the side airbag device 1 according to the present embodiment configured as described above will be described.
When the vehicle collides to the side and the gas is spouted from the inflator 3, the air bag 2 is filled with the gas, and the air bag 2 inflates and tears open the cushion pad 6 and the front surface of the skin member 7 Deploys from the cabin surface 1A into the cabin. At this time, the airbag 2 is restrained at a portion sandwiched between the inflator 3 and the inflator fixing portion 31 of the mounting bracket 30. At this time, the airbag 2 is likely to spread outward in the left-right direction of the vehicle body opposite to the inner portion (inflator fixing portion 31). Therefore, the airbag 2 can be easily deployed to the side of the occupant along the side wall BS and the door BD of the vehicle body.

  When the air bag 2 is deployed, the pressure in the air bag 2 may increase more than expected depending on conditions, such as when the cushion pad 6 is difficult to tear or when the gas pressure of the inflator 3 is high. However, in the side airbag device 1 of the present embodiment, since the inflator 3 is fixed to the inner side, it is easy to make a space on the rear side of the inflator 3. In particular, in the present embodiment, since the front surface of the rear side portion has a portion spaced apart from the inflator 3 by 3 cm or more, when the deployment force of the airbag 2 is large, the airbag 2 is an inflator Since it can spread to the space on the rear side of 3, it is possible to suppress that the airbag 2 is rapidly deployed forward.

  Further, in the present embodiment, when the guide plate 20 is positioned on the side of the housing space 51 with respect to the wire frame 10, for example, the outer wire frame 11 or the inner wire frame 12, The airbag 2 is difficult to catch. Therefore, the airbag 2 can be deployed stably. Further, since the guide plate 20 reinforces the front edge portions 11A and 12A of the wire frame 10, the rigidity of the base member 4 can be increased. In particular, in the present embodiment, the guide plate 20 is fixed to the front edges 11A and 12A of the wire frame 10 by welding, so that the front edge of the guide plate 20 and the front edges 11A and 12A of the wire frame 10 Can reinforce each other, so the rigidity of the front edge of the base member 4 can be increased. For this reason, when the airbag 2 is deployed, deformation of the outer side portion and the inner side portion, in particular, the front edge portions 11A and 12A can be suppressed, and the airbag 2 can be stably deployed forward.

Further, since the bridging portion 14 is located further from the cabin surface 1A than the center C1 of the main body 3A of the inflator 3, the airbag 2 is bridged when the airbag 2 is deployed from the cabin surface 1A into the cabin. Hard to get caught in part 14 Further, since the bridging portion 14 is located farther from the cabin surface 1A than the inflator fixing hole 31A, the airbag 2 is unlikely to be caught by the bridging portion 14 when the airbag 2 is deployed. Furthermore, since the second cross-linking portion 14B is positioned further from the cabin surface 1A than the entire main body 3A of the inflator 3, the airbag 2 is deployed when the airbag 2 is deployed from the cabin surface 1A into the cabin. It is hard to get caught in the bridge part 14. Therefore, the airbag 2 can be deployed stably.
Furthermore, since the bridge portion 14 connects the inner portion and the outer portion, the bridge portion 14 prevents the inner portion and the outer portion from spreading and deforming to the left and right. Thereby, the airbag 2 can be stably deployed. In particular, in the present embodiment, since the upper and lower end portions of the outer side portion and the inner side portion are connected by the first bridge portion 14A and the second bridge portion 14B, deformation of the base member 4 can be further suppressed.

  Further, in the present embodiment, the base member 4 is fixed to the side panel 200 by the nut N1 which is the outer fixing portion located at the outer side and the nut N3 which is the rear fixing portion located at the rear side. The side airbag device 1 can be fixed in a stable posture. Therefore, even when the deployment force of the airbag 2 is large, the posture of the base member 4 can be stabilized, and the airbag 2 can be deployed stably.

  In particular, the nut N1, which is the outer fixing portion, is located closer to the cabin surface 1A than the nut N3, which is the rear fixing portion, so that the side airbag device 1 can be stably fixed. It can be stably developed.

  Further, in the present embodiment, since the inflator fixing portion 31 of the mounting bracket 30 is closer to the cabin surface 1A than the base member fixing portion 32, the airbag 2 is unlikely to be caught by the base member fixing portion 32 when the airbag 2 is deployed. , Deployment of the airbag 2 is stabilized. Further, the air bag 2 is less likely to be caught by the nut N1, which is the outer fixing portion, and the deployment of the air bag 2 is stabilized. Furthermore, since the position of the inflator 3 is close to the cabin surface 1A, it is easy to secure a space on the rear side of the inflator 3, and it is possible to further suppress rapid deployment of the airbag 2 forward.

  Further, since the skin hooking portion 11F to which the hook 7A of the skin member 7 is hooked is disposed on the opposite side of the housing space 51 with the first guide plate 21 interposed therebetween, the airbag 2 is deployed when the airbag 2 is deployed. However, the airbag 2 can be stably deployed without being caught on the skin hooking portion 11F.

  Further, since the first guide plate 21 has the flange 21A extending outward in the left-right direction, the tip of the flange 21A abuts the side panel 200 when the outside portion spreads in the left-right direction at the time of deployment of the airbag 2. By contacting, it is possible to suppress the deformation of the outer part. In particular, in the present embodiment, since the flange 21A is in contact with the side panel 200 from the normal time, the outer portion is less likely to be deformed when the airbag 2 is deployed, and the airbag 2 can be deployed stably.

  In the present embodiment, the inflator 3 is fixed to the base member 4 via the mounting bracket 30. For this reason, it is possible to fix the mounting bracket 30 to the base member 4 by using the base member fixing portion 32 in a state where the inflator 3 is fixed to the mounting bracket 30 and made into a sub-assembly. It is easy to attach to the member 4. In particular, the base member fixing portion 32 is shifted to the rear side relative to the inflator 3 so that the base member fixing portion 32 can be easily accessed from the side, and the mounting bracket 30 is used as the base member 4 using the base member fixing portion 32. Easy to fix. That is, according to the side airbag apparatus 1 of this embodiment, the assemblability is good.

  Moreover, in this embodiment, the inflator 3 can be stably fixed by fixing the inflator 3 with a plurality of bolts 3B. Further, the mounting bracket 30 can be stably fixed to the base member 4 by the plurality of bolts B1.

  Furthermore, in the present embodiment, when the base member 4 includes the wire frame 10, the rigidity of the base member 4 can be easily increased. For this reason, the side airbag device 1 can be configured to be compact, and the side airbag device 1 can be mounted on a small passenger car.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. The specific configuration can be modified as appropriate without departing from the spirit of the present invention.

  For example, although the side airbag device 1 is fixed directly to the side panel 200 in the embodiment, a bracket may be fixed to the side panel 200, and the side airbag device 1 may be fixed to the bracket.

  In the embodiment, the nut N1 is welded to the first fixing plate 15A, 15B, the third fixing plates 16A, 16B, and the second fixing plates 17A, 17B. However, the bolt and the nut are not welded. The nut may be welded to the vehicle body and the bolt may be engaged with the nut. Additionally, other fastening members such as rivets may be used. In such a case, the first fixing plates 15A and 15B correspond to the outer fixing portion, and the third fixing plates 16A and 16B correspond to the rear fixing portion.

  In the above embodiment, the hook 7A is hooked to the skin hooking portion 11F provided on the wire frame 10, and the hook 7B is hooked to the second fixing plates 17A and 17B. However, each hook 7A and 7B is hooked The place to be used is not limited to these, and can be appropriately determined according to the configuration of the base member.

  In the above embodiment, an example in which the side airbag device is applied to the rear seat of a car has been described, but the invention can also be applied to the front seat.

  In the said embodiment, although the form which fixes the outer side part and rear part of a base member to a vehicle body was illustrated, the attachment structure to the vehicle body of a base member is not limited to this. For example, the base member may be fixed to the vehicle body only at the outer side, or may be fixed to the vehicle body only at the rear side.

  In addition, the elements described in the embodiment and the modifications described in this specification can be implemented in combination as appropriate.

DESCRIPTION OF SYMBOLS 1 side airbag apparatus 1A compartment surface 2 airbag 3 inflator 3A main-body part 3B bolt 4 base member 5 fabric 5 cushion pad 7 skin member 7A hook 10 wire frame 11 outer wire frame 11A front edge 11B upper edge 11C lower Edge portion 11F Skin hook portion 12 Inner wire frame 12A Front edge portion 12B Upper edge portion 12C Lower edge portion 13 Rear wire frame 13A Upper connection frame 13B Lower connection frame 14 Bridge portion 14A First bridge portion 14A Second bridge portion 20 Guide plate 21 first guide plate 21A flange 22 second guide plate 30 mounting bracket 31 inflator fixing portion 31A inflator fixing hole 32 base member fixing portion 32A base member fixing hole 33 connecting portion 200 side panel BD door BS Side wall N1 nut N2 nut N3 nut N4 nut S sheet

Claims (6)

A side airbag device disposed between a vehicle body and a seat, wherein
With an airbag,
An inflator for supplying gas into the air bag;
A base member that accommodates the airbag and the inflator and is fixed to the vehicle body;
A cover member covering at least the front side of the base member to form a front cabin surface;
The base member comprises a wire frame made of a metal rod,
The wire frame is
An outer wire frame constituting at least a part of an outer side portion located on the outer side in the left-right direction of the vehicle with respect to the airbag, and at least a part of an inner portion located on the inner side in the left-right direction of the vehicle An inner wire frame constituting the rear end of the seat, a rear wire frame positioned on the rear side of the seat in the front-rear direction of the air bag, and connecting the outer wire frame and the inner wire frame; And at least one bridge portion spaced apart forwardly and connecting the outer wire frame and the inner wire frame;
In at least one of the bridge portions, left and right outer end portions are fixed to the left and right inner surfaces of the outer wire frame, and left and right inner end portions are fixed to the left and right outer surfaces of the inner wire frame. Side air bag device that features.   The side airbag device according to claim 1, wherein the bridge portion includes a first bridge portion connecting an upper portion of the outer wire frame and an upper portion of the inner wire frame.   The side airbag device according to claim 1 or 2, wherein the bridge portion includes a second bridge portion connecting a lower portion of the outer wire frame and a lower portion of the inner wire frame. The inflator has a cylindrical main body, and a bolt provided to project from the main body,
The side air bag device according to any one of claims 1 to 3, wherein the bridge portion is located farther from the cabin surface than the center of the main body portion. The mounting bracket further includes an inflator fixing portion to which the inflator is fixed, and a base member fixing portion disposed at a position different from the inflator fixing portion and fixed to the base member.
The inflator fixing portion has an inflator fixing hole through which a bolt of the inflator passes.
The side air bag device according to any one of claims 1 to 3, wherein the bridge portion is located farther from the cabin surface than the inflator fixing hole.   The side airbag device according to any one of claims 1 to 5, wherein the bridge portion is positioned farther from the cabin surface than the entire main body portion.

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