JP7418179B2 - side airbag device - Google Patents

Description

The present invention relates to a side airbag device.

Conventionally, as a side airbag device, a structure is known in which a webbing is formed into a loop shape, the entire airbag module is placed inside the loop-shaped webbing, and then the airbag module is fixed to a bracket. (Patent Document 1, Figure 2, etc.).
In this structure, holes are formed in the webbing to allow the inflator bolts to pass through. During assembly, the airbag module is inserted into the loop-shaped webbing, and the inflator bolts are inserted into the holes in the webbing. Pass the bolt exposed on the outside of the webbing through the bracket, and then tighten the nut to the bolt.

JP2014-076736A

However, the structure as disclosed in Patent Document 1 has a problem in that it is difficult to insert the airbag module into the loop-shaped webbing.
In particular, since the inflator bolt protrudes, it is difficult to insert it into the loop-shaped webbing. In addition, the work of passing the inflator bolt through the hole in the cloth is complicated.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a side airbag device that can be easily assembled.

To achieve the above object, the side airbag device of the present invention includes an airbag module having an airbag and an inflator that supplies gas into the airbag, and an airbag module having an outlet portion from which the airbag exits when the airbag is deployed. The case includes a cloth and a skin member to which the cloth is attached near the exit portion.
The webbing includes a first webbing portion and a second webbing portion, at least a portion of which is disposed at a different position from the first webbing portion in the longitudinal direction of the inflator.
The first webbing portion has a first side portion extending from the outlet portion toward one side portion of the airbag module, and a second side portion extending from the outlet portion toward the other side portion of the airbag module. The first side part and the second side part are fixed or connected to each other by a connecting member separate from the webbing. The second webbing portion is formed in a loop shape surrounding the airbag module when viewed from the longitudinal direction.

According to such a configuration, since the second webbing portion, which is a part of the longitudinal direction of the inflator, is loop-shaped, by inserting the end of the airbag module into the second welding portion, it can be attached to the case. The airbag module is easy to align and assemble. The whole of the webbing is not loop-shaped, but the first webbing part, which is the other part in the longitudinal direction, has a first side part and a second side part. Since the second side parts are fixed or connected to each other by the connecting member, in a state where the first side part and the second side part are not fixed or connected by the connecting member, the first side part and the second side part You can release it to open it. Therefore, it is easy to insert the airbag module between the first side portion and the second side portion and to insert the end portion of the airbag module into the second webbing portion. That is, the assembly work of the side airbag device can be easily performed.

In the side airbag device described above, it is desirable that the inflator has a bolt, and that the bolt is located at a position different from the second webbing portion in the longitudinal direction.

According to such a configuration, it is not necessary to pass the bolt through the second welding part, so it is easy to insert the airbag module into the second welding part.

In the side airbag device described above, the bolt may be located at a position overlapping the first webbing portion in the longitudinal direction, and may not penetrate the first webbing portion. In this case, it is desirable that the connecting member and the first welding part be arranged so as not to interfere with the bolt.

According to such a configuration, even if the bolt is located at a position overlapping the first webbing portion in the longitudinal direction of the inflator, the connecting member is arranged so as not to interfere with the bolt. It is easy to fix or connect the side part and the second side part with the connecting member.

The side airbag device described above may further include a first bracket to which the inflator is fixed with a bolt, and which is fixed to the case. In this case, the end portion of the first bracket may overlap the second webbing portion in the longitudinal direction.

According to such a configuration, after the airbag module is inserted into the second welding part, it is possible to check whether it has been assembled correctly by checking the positional relationship between the end part and the second wedging part. .

The side airbag device described above may further include a first bracket to which the inflator is fixed with a bolt, and which is fixed to the case. In this case, it is desirable that the case has a second bracket to which the first bracket is fixed, and that at least a portion of the connecting member is disposed between the first bracket and the second bracket.

According to such a configuration, the airbag is unlikely to come into contact with the connecting member.

In the side airbag device described above, one end portion of the airbag module in the longitudinal direction may be covered by a second webbing portion.

According to such a configuration, since one end portion of the airbag module in the longitudinal direction is located in the second webbing portion, it is easy to insert the airbag module into the second webbing portion.

In the side airbag device described above, it is desirable that the second webbing portion be located below the first webbing portion.

According to such a configuration, the airbag module can be assembled by inserting the lower end portion of the airbag module into the second webbing portion from above, thereby improving the ease of assembly.

In the side airbag device described above, it is desirable that the second webbing portion be shorter than the first webbing portion in the longitudinal direction.

According to such a configuration, since the length of the loop-shaped second webbing portion is short, it is easy to insert the airbag module into the second webbing portion.

In the side airbag device described above, it is desirable to further include a fixing member that fixes the edge of the second webbing portion in the longitudinal direction to the case.

According to such a configuration, since the edge of the second webbing portion is fixed to the case by the fixing member, the loop-shaped opening of the second webbing portion can be easily opened, and the airbag module can be attached to the second webbing portion. Easy to insert.

In the side airbag device described above, it is desirable that the fixing member fixes the upper edge of the second webbing portion to the case.

According to such a configuration, since the upper end edge of the second webbing portion is fixed to the case, the mouth of the second webbing portion opens upward, making it easy to insert the airbag module into the second webbing portion.

In the above-described side airbag device, it is desirable that the portion of the second webbing portion connected to the fixing member becomes wider as the distance from the fixing member increases.

According to such a configuration, since a wide range of the edge of the second webbing section can be opened, it is easy to insert the airbag module into the second webbing section.

According to the present invention, since the second webbing portion, which is a part of the longitudinal direction of the inflator, has a loop shape, by putting the end of the airbag module into the second webbing portion, the airbag can be attached to the case. Easy to position modules and easy to assemble. When the first side part and the second side part are not fixed or connected by the connecting member, the first side part and the second side part can be separated and opened. It is easy to insert the airbag module between the two side parts and to insert the end of the airbag module into the second webbing part. That is, the assembly work of the side airbag device can be facilitated.

Furthermore, since the bolts of the inflator are located at different positions from the second webbing section in the longitudinal direction, there is no need to pass the bolts through the second webbing section, so the airbag module can be attached to the second webbing section. Easy to put in.

Furthermore, even if the bolt of the inflator is located at a position overlapping the first webbing portion in the longitudinal direction of the inflator, by arranging the connecting member so as not to interfere with the bolt, the first side portion and the second It is easy to fix or connect the side parts with connecting members.

In addition, if the end of the first bracket overlaps the second webbing part in the longitudinal direction, after the airbag module is inserted into the second webbing part, the end of the first bracket and the second webbing part overlap. By looking at the positional relationship of the cloth parts, it is possible to confirm whether the airbag module has been assembled correctly.

Furthermore, since at least a portion of the connecting member is disposed between the first bracket and the second bracket, the airbag is less likely to come into contact with the connecting member.

Moreover, if one end of the airbag module in the longitudinal direction is covered by the second webbing part, it is easy to insert the airbag module into the second webbing part.

In addition, since the second webbing section is located below the first webbing section, the lower end of the airbag module can be assembled by inserting it into the second webbing section from above, making assembly easier. will improve.

Further, in the longitudinal direction, the second webbing portion is shorter than the first webbing portion, so that it is easier to insert the airbag module into the second webbing portion.

Further, since the edge of the second webbing portion is fixed to the case by the fixing member, the loop-shaped mouth of the second webbing portion can be easily opened, and the airbag module can be easily inserted into the second webbing portion.

Further, since the fixing member fixes the upper edge of the second webbing portion to the case, the opening of the second webbing portion opens upward, making it easy to insert the airbag module into the second webbing portion.

In addition, the part of the second webbing section that connects to the fixing member becomes wider as the distance from the fixing member increases, so that a wide area of the edge of the second webbing section can be opened. It is easy to insert the airbag module into the section.

1 is a diagram of a vehicle equipped with a side airbag device viewed from inside the vehicle; FIG. (a) is a view of the side panel of the vehicle body as seen from the inside of the vehicle, and (b) is a view of the striker and base bracket as seen from above. FIG. 2 is an exploded perspective view of the side airbag device. They are a cross-sectional view (a) of the side airbag device passing through the first webbing portion, and an enlarged view (b) of the vicinity of the seam portion between the welt cloth and the outer skin. FIG. 3 is a cross-sectional view of the side airbag device passing through the second webbing portion. It is a perspective view of a 1st attachment wire, a 2nd attachment wire, and a fixed wire. FIG. 3 is a view of the side airbag device viewed from the left and right outer sides. FIG. 2 is an exploded perspective view of the side airbag device viewed from the left and right outside. It is a figure explaining the process of fixing a 1st bracket to a 2nd bracket.

Next, one embodiment of the invention will be described in detail with reference to the drawings as appropriate.
As shown in FIG. 1, a side airbag device 1 according to the present embodiment is applied to a rear seat of an automobile, and is arranged between a seat S and a side wall BS of a vehicle body. Specifically, the seat S has a seat cushion S1 and a seat back S2, and the side airbag device 1 is arranged between the seat back S2 and the side wall BS.

The seat back S2 is rotatable back and forth about its lower end so that it can be folded forward. On the other hand, the side airbag device 1 is fixed to the side wall BS of the vehicle body, and is not fixed to the seat back S2. Therefore, when the seat back S2 is folded forward, the side airbag device 1 remains on the side wall BS and is exposed. When the seat back S2 is in the upright state shown in FIG. 1, the front surface of the side airbag device 1 is substantially flush with the front surface of the seat back S2. Therefore, when the seat S is normally used, the side airbag device 1 visually becomes a part of the seat back S2.

In this embodiment, a side airbag device 1 disposed on the left side of the vehicle body (left side of the seat S) will be described, but a side airbag device with a symmetrical configuration may also be provided on the right side of the vehicle body. can. Furthermore, in this embodiment, unless otherwise specified, the inside and outside in the left-right direction are based on the vehicle body, not the side airbag device 1 itself. That is, the side closest to the left-right center of the vehicle body is defined as the inside, and the side far from the left-right center of the vehicle body is defined as the outside. Further, the front and rear and top and bottom directions are based on the seat S unless otherwise specified.

In the side airbag device 1 shown in FIG. 1, a tearing portion 1C that rips and expands when the airbag 11 (see FIG. 4(a)) is deployed is provided on the front surface in a vertically long manner.

As shown in FIG. 2(a), the vehicle body has a side panel 300. The side panel 300 is made of metal and includes a side wall portion 310 that constitutes a side wall BS, a wheel house 320 that bulges inward from the side wall portion 310 in the left and right directions, and a striker installation portion 330.

The wheel house 320 is a part that accommodates the tire T. An airbag mounting bracket 340 is fixed to the wheel house 320 at a position corresponding to the upper part of the tire T by welding or the like. The airbag attachment bracket 340 is a member for attaching the side airbag device 1 to the vehicle body, and is made of a metal plate. As shown in FIG. 3, the airbag mounting bracket 340 has a hole 341 into which a bolt 93B for fixing the side airbag device 1 is inserted. Further, nuts 93N are welded to the left and right outer surfaces of the airbag mounting bracket 340.

Returning to FIG. 2A, the striker installation portion 330 is a portion that secures an installation surface for the striker 350, and is fixed to the upper part of the side panel 300 by welding or the like. As shown in FIG. 2(b), the striker 350 is a U-shaped member that protrudes inward from the side panel 300 to the left and right, and is made of metal. The seat back S2 of the seat S has a latch mechanism (not shown) that can be engaged with the striker 350, and is locked in the upright state when the latch mechanism engages with the striker 350 when raised from the forwardly folded state. be done.

The striker 350 is fixed to a striker installation portion 330 of the vehicle body via a base bracket 360. The base bracket 360 is made of a metal plate, and includes a base portion 361 that is attached to the striker installation portion 330, a connecting portion 362 that extends inward from the upper end of the base portion 361, and a connecting portion 362 that extends upward from the inner left and right ends of the connecting portion 362. It has a bag fixing part 363. A bolt 92B is fixed to the airbag fixing portion 363 by welding so as to protrude inward from the left and right. The striker 350 is fixed to the base portion 361 by welding or the like. The base bracket 360 is fixed to the striker installation part 330 with a plurality of bolts 364.

As shown in FIG. 3, the side airbag device 1 includes an airbag module 10, a case 2, a webbing 30, and a first bracket 100.

The airbag module 10 includes an airbag 11 and an inflator 12 that supplies gas into the airbag 11. The inflator 12 has two protruding bolts 12B, and is fixed to the first bracket 100 at the bolts 12B. The airbag 11 is folded so as to be inflatable by the gas pressure of the inflator 12, and is gathered around the inflator 12.

The case 2 has an airbag module 10 attached therein. The case 2 includes a second bracket 200, a wire frame 20, a pad 70 (see FIG. 4(a)), and a skin member 80 (see FIG. 4(a)).

The second bracket 200 constitutes the skeleton of the case 2 together with the wire frame 20.
The second bracket 200 has a main body portion 210 , a notch portion 220 , a first extending portion 230 , and a second extending portion 240 .

The main body part 210 is arranged from the center to the upper part of the wall inside the vehicle body of the case 2 . The cutout portion 220 is formed at the rear edge of the upper portion of the main body portion 210 . The cutout portion 220 is a portion through which the striker 350 passes.

A fixing hole 211, which is used when fixing the side airbag device 1 to the vehicle body, is formed in a portion of the main body portion 210 above the notch portion 220. Further, a fixing part 212 used for fixing the first bracket 100 is provided in a portion of the main body part 210 below the notch part 220. In the fixing part 212, a hole 218 (see FIGS. 8 and 9) is opened in the main body part 210, and a nut 91N is welded to the right side surface.

An engagement hole 213 is formed in the main body portion 210 . The engagement hole 213 has a first edge 213A extending substantially vertically on its rear side, and a second edge 213B extending substantially horizontally on its lower side.

Furthermore, a trapezoidally protruding joint 214 is formed on the front edge of the main body 210, and two trapezoidally protruding joints 215 are formed on the upper edge of the main body 210.

The first extending portion 230 extends downward from the rear portion of the lower end of the main body portion 210 . The first extending portion 230 has an inclined portion 231 extending diagonally downward from the lower end of the main body portion 210 on the left and right outer sides, and a fixing portion 232 extending downward from the lower end of the inclined portion 231. The fixing portion 232 is located outside the main body portion 210 in the left-right direction. A fixing hole 233 used when fixing the side airbag device 1 to the vehicle body and an engagement hole 234 used when fixing the first bracket 100 to the second bracket 200 are formed in the fixing part 232. There is. The fixing hole 233 is a circular hole through which the bolt 93B passes, and the engagement hole 234 is a rectangular hole into which the tongue portion 113 at the lower end of the first bracket 100 engages. The engagement hole 234 is arranged below the fixing hole 233.

The second extending portion 240 extends downward from the front portion of the lower end of the main body portion 210 . The second extending portion 240 has an extending portion 241 extending downward from the lower end of the main body portion 210 and a bracket lower end portion 242 extending outward from the lower end of the extending portion 241 to the left and right sides.

The wire frame 20 is made of metal wire. The wire frame 20 is fixed to the second bracket 200 by welding or the like. In addition, in the figures, welded joints are indicated by dotted hatches.
The wire frame 20 is constructed by joining a first wire 21, a second wire 22, and a third wire 23 by welding. Note that in this embodiment, the wire frame 20 is composed of three wires 21 to 23, but the number of wires that compose the wire frame 20 is arbitrary.

The first wire 21 connects to a frame portion 21A formed along the contours of the left and right outer sides of the front portion of the side airbag device 1 and the left and right outer contours of the upper portion, and a connecting portion 21B extending rearward from the lower end of the frame portion 21A. have. The connecting portion 21B is joined to the bracket lower end portion 242 of the second bracket 200.

The second wire 22 includes a frame portion 22A formed along the inner left and right contours of the front and upper portions of the side airbag device 1, a connecting portion 22B extending left and right outward from the upper end of the frame portion 22A, and a connecting portion 22B extending outward from the upper end of the frame portion 22A. The connecting portion 22C extends rearward from the lower end of the connecting portion 22C.
The left and right outer ends of the connecting portion 22B extend forward in a bent manner, and the forwardly extending portions are joined to the upper end portion of the frame portion 21A of the first wire 21. The connecting portion 22C is joined to the second bracket 200. Further, the frame portion 22A is joined to the distal ends of the joint portions 214 and 215 of the second bracket 200.

The third wire 23 has one end joined to the front part of the frame part 21A of the first wire 21 and the other end joined to the front part of the frame part 22A of the second wire 22, so that the first wire 21 and the second wire 22 are connected.

As shown in FIG. 4(a), in the case 2, a wire frame 20 and a second bracket 200 are insert-molded on a pad 70. A skin member 80 covers the outside of the pad 70.
The skin member 80 is a member that constitutes the outer surface of the side airbag device 1, and is made of cloth, leather, or the like. The skin member 80 covers the second bracket 200, the wire frame 20, and the pad 70 from the front side, the upper side, and the left and right inner sides. A hook 82 is attached to an end portion 81 of the skin member 80 at a portion that covers the left and right inner sides of the pad 70 . The hook 82 is hooked onto the first edge 213A (see FIG. 3) of the engagement hole 213 of the second bracket 200 from the left and right outer sides, thereby fixing the end 81 of the skin member 80 to the second bracket 200. has been done.

The pad 70 has a slit 71A for letting the airbag 11 out of the case 2 when the airbag 11 is deployed. The slit 71A extends vertically. The skin member 80 enters the slit 71A of the pad 70 and is disposed along the surface of the pad 70. The two parts of the skin member 80 that have entered the slit 71A are sewn together by a sewing part 85 that is weak to each other, as shown in FIG. 4(b).

As shown in FIG. 3, the webbing 30 is a member for regulating the deployment direction of the airbag 11 when the airbag 11 is deployed, and for opening the tearing portion 1C. The webbing 30 has a first webbing part 31 provided corresponding to a part of the airbag module 10 in the longitudinal direction of the inflator 12 (hereinafter simply referred to as "longitudinal direction"), and a first webbing part 31 in the longitudinal direction. It has a first cloth part 31 and a second cloth part 32 arranged at a different position. In this embodiment, the second webbing section 32 is entirely disposed at a different position from the first webbing section 31 in the longitudinal direction. The inflator 12 extends substantially in the vertical direction, and the second webbing section 32 is located below the first webbing section 31. Further, the second webbing portion 32 is shorter than the first webbing portion 31 in the longitudinal direction.

The first webbing portion 31 and the second webbing portion 32 have front end portions divided into left and right parts, and have an outlet portion 30A from which the airbag 11 exits when the airbag 11 is deployed between the left and right parts. The first webbing portion 31 includes a first side portion 31R extending from the outlet portion 30A toward the right side (one side) of the airbag module 10, and a first side portion 31R extending from the outlet portion 30A toward the left side (the other side) of the airbag module 10. ). The second webbing portion 32 also includes a third side portion 32R extending from the outlet portion 30A toward the right side (one side) of the airbag module 10, and a third side portion 32R extending from the outlet portion 30A toward the left side (other side) of the airbag module 10. and a fourth side portion 32L extending toward the side portion).
As shown in FIG. 4(b), the front end portions of the first webbing portion 31 (31R, 31L) and the second webbing portion 32 (32R, 32L) are connected to the skin member 80 in the vicinity of the outlet portion 30A. is attached to. Specifically, the first side portion 31R of the first webbing portion 31 and the third side portion 32R of the second webbing portion 32 are attached to the right skin member 80 by a sewn portion 86 that is stronger than the sewn portion 85. The second side portion 31L of the first cloth portion 31 and the fourth side portion 32L of the second cloth portion 32 are sewn to the left skin member 80 by a sewing portion 86 that is stronger than the sewing portion 85. ing.

Returning to FIG. 3, the first side parts 31R, 32R and the second side parts 31L, 32L of the webbing 30 are connected to the fixed wire 60 fixed to the first bracket 100 by a connecting member CN different from the webbing 30. Fixed. Details of the connecting member CN will be described later.

In the second webbing portion 32, the rear end portion of the third side portion 32R and the rear end portion of the fourth side portion 32L are sewn together along the up-down direction. Thereby, as shown in FIG. 5, the second webbing portion 32 is formed in a loop shape surrounding the airbag module 10 when viewed from the longitudinal direction. Note that the third side portion 32R and the fourth side portion 32L may be formed of a single piece of cloth instead of being connected by stitching to form a loop shape.

As shown in FIG. 3, the third side portion 32R of the second webbing portion 32 has a connecting portion 33 at the top, and a hook 35 as an example of a fixing member is fixed to the upper end of the connecting portion 33. There is. The hook 35 is hooked onto the second edge 213B of the engagement hole 213 of the second bracket 200 (see FIG. 8). Thereby, the hook 35 fixes the edge in the longitudinal direction of the second webbing portion 32 , in this embodiment the upper edge, to the case 2 . The connecting portion 33 of the second webbing portion 32 has a trapezoidal shape in which a portion connected to the hook 35 becomes wider as the distance from the hook 35 increases.

The first bracket 100 is a member to which the airbag module 10 is fixed. The first bracket 100 is fixed to the second bracket 200 with the airbag module 10 attached thereto.

The first bracket 100 has a main body part 110 to which the airbag module 10 is fixed, a fixing part 118, a first extending part 120, a second extending part 130, and a notch part 140. .

The main body portion 110 is a portion to which the airbag module 10 is fixed, and is provided with two fixing holes 111 through which the two bolts 12B of the inflator 12 are respectively inserted. The airbag module 10 is fixed to the main body part 110 by inserting a bolt 12B into the fixing hole 111 and screwing the nut 12N onto the bolt 12B. Further, a fixing wire 60 for fixing the connecting member CN is joined to the main body portion 110 by welding or the like.

A fixing portion 118 is provided at the lower end of the main body portion 110 and is positioned inwardly in the left-right direction with respect to the main body portion 110 . The fixing portion 118 is provided with a fixing hole 112 through which the bolt 93B passes when fixing the side airbag device 1 to the vehicle body. A tongue portion 113 that engages with the engagement hole 234 of the second bracket 200 when fixing the first bracket 100 to the second bracket 200 extends from the lower end of the fixing portion 118 . The tongue portion 113 is bent to the right and extends further downward. The width of the tongue portion 113 in the front-rear direction is approximately the same as the width of the engagement hole 234 in the front-rear direction.

The first extending portion 120 extends rearward from the rear end of the upper portion of the main body portion 110 . The first extending portion 120 is provided with a fixing hole 121 into which the bolt 91B is inserted when fixing the first bracket 100 to the second bracket 200.

The second extending portion 130 extends upward from the upper end of the main body portion 110 and further extends rearward. A fixing hole 131 into which a bolt 92B is inserted when fixing the side airbag device 1 to the vehicle body is provided at the rear end of the second extending portion 130.

As shown in FIG. 6, the connection member CN has a first attachment wire 40 and a second attachment wire 50.
The first attachment wire 40 is a member to which the first side portion 31R of the first webbing portion 31 is attached, and the second attachment wire 50 is a member to which the second side portion 31L is attached. Further, the fixed wire 60 is a member to which the first attachment wire 40 and the second attachment wire 50 are fixed. The first attachment wire 40, the second attachment wire 50, and the fixed wire 60 are made of metal.

The fixed wire 60 includes a wire attachment part 61 extending vertically, a pair of connection parts 62 extending forward from the upper and lower ends of the wire attachment part 61, and a pair of connection parts 62 extending up and down from the front ends of each connection part 62 so as to approach each other. It has a fixed part 63. The pair of fixed parts 63 are fixed to the first bracket 100 (see FIG. 3).
The wire attachment portion 61 has two upper and lower wire engagement portions 61A bent so that portions of the attachment wires 40, 50 that are engaged with curved portions 44, 54 (described later) are convex toward the front.

The first attachment wire 40 includes a first webbing attachment part 41 that extends vertically, a first upwardly extending part 42 that extends rearward from the upper end of the first webbing attachment part 41, and a first webbing attachment part 42 that extends rearward from the upper end of the first webbing attachment part 41. The first lower extending portion 43 is a portion extending rearward from the lower end of the portion 41 .
The first webbing attachment portion 41 is a portion to which the first side portion 31R is attached. The first side portion 31R has a ring portion R1 at the rear end, and the first attachment wire 40 is attached to the first side portion 31R by passing the first webbing attachment portion 41 through the ring portion R1. .

A first curved portion 44 is provided at the rear end portion of the first upper extending portion 42 and the first lower extending portion 43, respectively. The first curved portion 44 is a portion that engages with the wire attachment portion 61 (wire engagement portion 61A) of the fixed wire 60, and is curved so as to be convex toward the rear. Each end portion 44A of each first curved portion 44 is bent and extends vertically so as to approach each other.

Note that in this embodiment, the first lower extending portion 43 approaches the first upper extending portion 42 as it approaches the wire attachment portion 61. Thereby, the vertical length of the first webbing attachment part 41 can be ensured while making the part attached to the fixed wire 60 compact. Therefore, although the airbag is compact, the deployment direction of the airbag 11 can be well regulated by the first side portion 31R.

By the way, as shown in FIG. 3, the fixing part 118 of the first bracket 100 is shifted inward in the left-right direction with respect to the main body part 110, while the fixing part 232 of the second bracket 200 is shifted inward with respect to the main body part 210. As shown in FIG. 4(a), when the fixing part 118 of the first bracket 100 and the fixing part 232 of the second bracket 200 are aligned, the main body part 110 and the main body part A space is created between 210. A part of the first attachment wire 40, that is, a part of the connecting member CN, is arranged in the space between the first bracket 100 and the second bracket 200.

As shown in FIG. 6, the second attachment wire 50 includes a second webbing attachment portion 51 that extends vertically, and a second upper extension portion that extends inward from the upper end of the second weft attachment portion 51. 52, and a second lower extending portion 53 which is a portion extending inward from the lower end of the second webbing attachment portion 51 to the left and right.
The second webbing attachment portion 51 is a portion to which the second side portion 31L is attached. The second side portion 31L has a ring portion R2 at the rear end, and the second attachment wire 50 is attached to the second side portion 31L by passing the second webbing attachment portion 51 through the ring portion R2. .
A second curved portion 54 is provided at the left and right inner end portions of the second upper extending portion 52 and the second lower extending portion 53, respectively. The second curved portion 54 is a portion that engages with the wire attachment portion 61 (wire engagement portion 61A) of the fixed wire 60, and is curved so as to be convex inward from the left and right. Each end 54A of each second curved portion 54 is bent and extends forward, and is further bent in the vertical direction so as to approach each other. In the state where the second curved portion 54 is engaged with the wire attachment portion 61, the end portion 54A of the second curved portion 54 is engaged with the end portion 44A of the first curved portion 44. Therefore, not only the first attachment wire 40 engages with the fixed wire 60 and the second attachment wire 50 engages with the fixed wire 60, but also the second attachment wire 50 engages with the first attachment wire 40. , these three parts are designed not to be easily disengaged.

In addition, in this embodiment, the second upper extending part 52 and the second lower extending part 53 approach each other as they approach the wire attachment part 61. Thereby, the vertical length of the second webbing attachment part 51 can be ensured while making the part attached to the fixed wire 60 compact. Therefore, while being compact, the deployment direction of the airbag 11 can be well regulated by the second side portion 31L.

As shown in FIG. 7, the two bolts 12B of the inflator 12 are located at different positions from the second webbing portion 32 in the longitudinal direction. Specifically, the two bolts 12B are located above the second webbing portion 32.

Further, the two bolts 12B are located at positions overlapping the first webbing portion 31 in the longitudinal direction, and do not penetrate through the first webbing portion 31. Specifically, as shown in FIG. 4, the first side portion 31R of the first webbing portion 31 is short in the front-rear direction and does not extend to the side of the bolt 12B, that is, to the right side. It is arranged so as not to interfere with the bolt 12B. The rear end portion of the first side portion 31R and the fixed wire 60 are connected by a first attachment wire 40 that is long in the front and rear directions. A first attachment wire 40 is arranged at a portion where the inflator 12 and bolt 12B are located in the front-rear direction.
As shown in FIG. 7, the first attachment wire 40 is arranged so as not to overlap the bolt 12B when viewed from the left and right direction. That is, the connecting member CN is arranged so as not to interfere with the bolt 12B. In addition, in FIG. 7, the webbing 30 is shown by a virtual line.

A lower end portion of the airbag module 10, which is an example of one end portion in the longitudinal direction, is covered with a second webbing portion 32.

Further, the lower end of the first bracket 100 overlaps the second webbing portion 32 in the longitudinal direction. In other words, the lower end of the first bracket 100 overlaps the second webbing portion 32 when viewed from the left and right direction.

Next, an example of a method of assembling the side airbag device 1 and a method of attaching the side airbag device 1 to a vehicle body will be described.
As shown in FIG. 3, first, the second bracket 200 and the wire frame 20 are fixed by welding. Next, the second bracket 200 and the wire frame 20 are placed in a mold (not shown), and the pad 70 is integrally molded with the second bracket 200 and the wire frame 20, as shown in FIG. 4(a).

Next, the front end of the webbing 30 is coupled to the skin member 80. Then, the pad 70 is covered with the skin member 80, and the skin member 80 is fixed to the second bracket 200. Specifically, the hook 82 attached to the end 81 of the skin member 80 is hooked into the engagement hole 213 of the second bracket 200.

Next, the force cloth 30 is passed through the slit 71A of the pad 70 from the front to the back. Then, as shown in FIG. 8, the webbing 30 extends backward from the front wall of the pad 70. Then, the hook 35 attached to the second webbing portion 32 is hooked into the engagement hole 213. Thereby, the right side portion of the upper edge of the second webbing portion 32 is maintained along the second bracket 200 side, and the upper edge is kept open.

Meanwhile, as shown in FIG. 3, the airbag module 10 is attached to the first bracket 100. Specifically, the two bolts 12B are passed through the fixing holes 111 of the first bracket 100, and the nuts 12N are fastened.

Then, as shown in FIG. 8, the upper edge of the loop-shaped second webbing part 32 is opened, the first webbing part 31 is also opened left and right, and the lower end of the airbag module 10 is connected to the second webbing part 32. Insert it into the loop of 32. After the airbag module 10 is fully inserted into the second webbing section 32 until the lower end of the first bracket 100 is located at the height of the second webbing section 32, the airbag module 10 is inserted into the second webbing section 32, as shown in FIG. 1. Pull the attachment wire 40 backward through the right side of the airbag module 10 and the first bracket 100 and hook it onto the fixed wire 60. Further, the second side portion 31L and the second attachment wire 50 are passed through the left side of the airbag module 10 and pulled rearward, and hooked onto the fixed wire 60 and the first attachment wire 40.

Next, the first bracket 100 is fixed to the second bracket 200. Specifically, as shown in FIG. 9, first, the tip of the tongue 113 is inserted into the engagement hole 234. Next, the first bracket 100 is turned left and right inward around the tongue portion 113 to align the fixing hole 121 of the first bracket 100 with the nut 91N (hole 218) of the second bracket 200. Then, as shown in FIG. 3, the bolt 91B is passed through the fixing hole 121 and the hole 218 from the left and right outside, and fastened to the nut 91N.

Through the above steps, the side airbag device 1 can be manufactured. Note that the above steps may be performed by changing the order as appropriate.

When attaching the side airbag device 1 to the vehicle body, first, as shown in FIG. 2, the airbag attachment bracket 340 and the base bracket 360 to which the striker 350 is fixed are fixed to the side panel 300. Then, as shown in FIG. 3, the bolts 92B fixed to the base bracket 360 are inserted into the fixing holes 131 of the first bracket 100 and the fixing holes 211 of the second bracket 200 from the left and right outer sides.

Further, the fixing hole 233 of the second bracket 200 and the fixing hole 112 of the first bracket 100 are aligned with the hole 341 of the airbag mounting bracket 340. Then, the nut 92N is fastened to the bolt 92B of the base bracket 360, and the bolt 93B is inserted into the fixing holes 233, 112 and the hole 341 from the left and right inside, and fastened to the nut 93N of the airbag mounting bracket 340.
Through the above steps, the side airbag device 1 can be attached to the vehicle body.

The effects of the side airbag device 1 of this embodiment as described above will be explained.
Since the second webbing portion 32 has a loop shape, by inserting the lower end of the airbag module 10 into the second webbing portion 32, the airbag module 10 can be easily aligned with respect to the case 2. It is easy to assemble the airbag module 10 to 2. The whole of the webbing 30 is not loop-shaped, but only a part of the lower part is loop-shaped, and the first webbing part 31 on the upper side has the first side part 31R and the first side part 31R. Since it is divided into two side parts 31L, the first side part 31R and the second side part 31L can be separated and opened. Therefore, it is easy to insert the airbag module 10 between the first side portion 31R and the second side portion 31L and to insert the lower end portion of the airbag module 10 into the second webbing portion 32. That is, the assembly work of the side airbag device 1 can be facilitated.

After putting the lower end of the airbag module 10 into the second webbing portion 32, the first attachment wire 40 and the second attachment wire 50 are fixed to the fixed wire 60, thereby connecting the first side portion 31R and The rear end of the second side portion 31L can be fixed. Therefore, the first webbing portion 31 can be firmly fixed, and the deployment direction of the airbag 11 can be reliably regulated by the webbing 30.

Further, since the bolt 12B of the inflator 12 is located at a different position from the second welding part 32 in the longitudinal direction of the inflator 12, there is no need for the bolt 12B to pass through the second welding part 32. Therefore, it is easy to insert the airbag module 10 into the second webbing section 32.

Further, although the bolt 12B of the inflator 12 is located at a position overlapping the first webbing portion 31 in the longitudinal direction of the inflator 12, since the connecting member CN is arranged so as not to interfere with the bolt 12B, the first side It is easy to fix the 31R and the second side part 31L with the connecting member CN.

Furthermore, since the lower end of the first bracket 100 overlaps the second webbing portion 32 when viewed from the left and right, after inserting the airbag module 10 into the second webbing portion 32, the lower end of the first bracket 100 overlaps with the second webbing portion 32. By looking at the positional relationship between the lower end portion and the second webbing portion 32, it is possible to confirm whether the airbag module 10 has been correctly assembled.

Furthermore, since a part of the connecting member CN is disposed between the first bracket 100 and the second bracket 200, the airbag 11 is less likely to come into contact with the connecting member CN.

Further, since the lower end of the airbag module 10 is located in the second webbing section 32, it is easy to insert the airbag module 10 into the second webbing section 32.

Further, since the airbag module 10 can be assembled by inserting it into the loop of the second webbing section 32 from above, the assembly is easy.

Further, since the length of the second webbing portion 32 in the longitudinal direction of the inflator 12 is shorter than the first webbing portion 31, it is easy to insert the airbag module 10 into the second webbing portion 32.

Furthermore, since the edge of the second webbing portion 32 is fixed to the case 2 by the hook 35, the loop-shaped mouth of the second webbing portion 32 can be easily opened, and the airbag module 10 can be attached to the second webbing portion 32. Easy to insert. In particular, in this embodiment, since the upper edge of the second webbing section 32 is fixed to the case 2, the opening of the second webbing section 32 opens upward, and the airbag module 10 is attached to the second webbing section 32. Easy to insert.

In addition, the connecting portion 33, which is the part of the second webbing portion 32 that connects to the hook 35, becomes wider as it moves away from the hook 35, so that a wide range of the edge of the second webbing portion 32 can be opened. The airbag module 10 can be easily inserted into the second webbing portion 32.

Although one embodiment of the invention has been described above, the present invention is not limited to the embodiment described above, and can be implemented with appropriate modifications.
For example, in the embodiment, the fixed wire 60 is fixed to the first bracket 100, but it may be fixed to the case 2, for example, the second bracket 200.

Further, although the first side portion 31R and the second side portion 31L of the connecting member CN are fixed to the fixed wire 60 fixed to the first bracket 100, they may be fixed to the case 2. Furthermore, the connecting member CN may connect the first side portion 31R and the second side portion 31L to each other. For example, by connecting the first side portion 31R and the second side portion 31L with the connecting member CN, the first side portion 31R, the second side portion 31L, and the connecting member CN can be connected to the airbag when viewed from the longitudinal direction of the inflator 12. It may be configured to surround the module 10.

Further, the entire connecting member CN may be disposed between the first bracket 100 and the second bracket 200.

In the embodiment, the second webbing section 32 is entirely disposed at a different position from the first webbing section 31 in the longitudinal direction of the inflator 12, but a portion of the second webbing section 32 is disposed at a different position from the first webbing section 31 in the longitudinal direction. It may be arranged at the same position as the section 31. For example, the first webbing portion may overlap the second webbing portion so as to surround the outside of the second webbing portion.

In the embodiment described above, the second webbing part 32 is located below the first webbing part 31, and the airbag module 10 is inserted downward from the upper opening of the second webbing part 32. , the airbag module may be inserted into the second webbing portion from below. For example, the second webbing portion may be located above the first webbing portion.

In the embodiment described above, one end of the airbag module 10 in the longitudinal direction was covered with the second force cloth part 32, but the one end of the airbag module does not overlap the second force cloth part and the second force cloth part 32 covers the second force cloth part 32. It may also be configured to be inserted by penetrating the fabric portion up and down.

Further, the second webbing portion may be longer than the first webbing portion in the longitudinal direction.

Further, although the hook 35 is illustrated as the fixing member, the fixing member may be a snap button or the like. Furthermore, there is no need to provide a fixing member.

In the embodiment described above, the side airbag device 1 was fixed to the vehicle body separately from the seat back part that can be folded forward, but it is configured as a part of the seat back part that can be folded forward or backward. may have been done.

Furthermore, in the embodiment described above, an example has been described in which the side airbag device is applied to a rear seat of an automobile, but it may also be applied to, for example, a front seat of an automobile, a middle seat of a third row of seats, or the like.

Furthermore, the elements described in the embodiments and modified examples described above can be implemented in appropriate combinations.

1 Side airbag device 1C tearing part 2 case 10 airbag module 11 airbag 12 inflator 12B bolt 20 wire frame 30 webbing 30A outlet part 31 first webbing part 31R first side part 31L second side part 32 second Webbing section 33 Connection section 35 Hook 40 First attachment wire 50 Second attachment wire 60 Fixed wire 70 Pad 80 Outer skin member 86 Sewing section 100 First bracket 200 Second bracket 300 Side panel CN Connection member

Claims (9)

an airbag module having an airbag and an inflator supplying gas into the airbag;
a force cloth having an outlet portion from which the airbag exits when the airbag is deployed;
A side airbag device comprising: a case including a skin member to which the force cloth is attached near the exit portion;
The webbing includes a first webbing portion and a second wefting portion, at least a portion of which is disposed at a position different from the first webbing portion in the longitudinal direction of the inflator;
The first webbing portion includes a first side portion extending from the outlet portion toward one side portion of the airbag module, and a second side portion extending from the outlet portion toward the other side portion of the airbag module. and the first side portion and the second side portion are fixed by a connecting member different from the webbing, or are connected to each other,
The second webbing portion is formed in a loop shape surrounding the airbag module when viewed from the longitudinal direction ,
the inflator has a bolt;
The bolt is located at a different position from the second welding part in the longitudinal direction,
The bolt is located at a position overlapping the first welding part in the longitudinal direction, and does not penetrate the first welding part,
A side airbag device , wherein the connecting member and the first webbing portion are arranged so as not to interfere with the bolt . further comprising a first bracket to which the inflator is fixed at the bolt, the first bracket being fixed to the case;
The side airbag device according to claim 1 , wherein the end portion of the first bracket overlaps the second webbing portion in the longitudinal direction. further comprising a first bracket to which the inflator is fixed at the bolt, the first bracket being fixed to the case;
The case has a second bracket to which the first bracket is fixed,
The side airbag device according to claim 1 , wherein at least a portion of the connecting member is disposed between the first bracket and the second bracket. The side airbag device according to any one of claims 1 to 3 , wherein one end portion of the airbag module in the longitudinal direction is covered by the second webbing portion. The side airbag device according to any one of claims 1 to 4 , wherein the second webbing portion is located below the first webbing portion. The side airbag device according to any one of claims 1 to 5 , wherein the second webbing portion is shorter than the first welting portion in the longitudinal direction. an airbag module having an airbag and an inflator supplying gas into the airbag;
a force cloth having an outlet portion from which the airbag exits when the airbag is deployed;
A side airbag device comprising: a case including a skin member to which the force cloth is attached near the exit portion;
The webbing includes a first webbing portion and a second wefting portion, at least a portion of which is disposed at a position different from the first webbing portion in the longitudinal direction of the inflator;
The first webbing portion includes a first side portion extending from the outlet portion toward one side portion of the airbag module, and a second side portion extending from the outlet portion toward the other side portion of the airbag module. and the first side portion and the second side portion are fixed by a connecting member different from the webbing, or are connected to each other,
The second webbing portion is formed in a loop shape surrounding the airbag module when viewed from the longitudinal direction,
The side airbag device further includes a fixing member that fixes an edge of the second webbing portion in the longitudinal direction to the case. The side airbag device according to claim 7 , wherein the fixing member fixes an upper edge of the second webbing portion to the case. 9. The side airbag device according to claim 7 , wherein a portion of the second webbing portion that connects to the fixing member becomes wider as the distance from the fixing member increases.

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