JP2019156173A - Side airbag device - Google Patents

Abstract

To improve assembly rigidity of a base member which stores an airbag module and a retainer member.SOLUTION: A side airbag device 1 includes: an airbag module 10 having an inflatable airbag 11 and an inflator 12 which supplies gas to an interior of the airbag 11; a base member 20 having a recessed airbag storage part 21 which stores the airbag module 10 and attached to a space between a vehicle body door D and a seat S; and a retainer member 50 which retains the airbag storage part 21 from a vehicle body rear side. The base member 20 has: a base member body part 20A provided with the airbag storage part 21; and a lower protruding part 20B protruding downward from the base member body part 20A. The retainer member 50 has a retainer attachment part 60 which is disposed facing a lower protruding part 20B. The retainer attachment part 60 has: a first fastening part 61 fastened to the base member 20; and a second fastening part 62 fastened to a vehicle body B.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a side airbag device, and more particularly to a side airbag device provided in a vehicle seat.

  2. Description of the Related Art A vehicle seat including a side airbag device that inflates and deploys an airbag provided on a side portion of a vehicle seat at the time of a side collision of the vehicle to protect an occupant is known (for example, the following patent document) 1).

  The side airbag device described in Patent Literature 1 includes a base member in which a storage portion that stores an airbag is formed, and a bracket (retainer member) that holds the storage portion from the rear.

International Publication No. 2012/035619

  In the above-described conventional side airbag device, the base member and the retainer member are fastened by an inflator bolt, and the retainer member is fastened to the vehicle body at the lower end. As described above, in the side airbag device described in Patent Document 1, since the fastening point between the retainer member and the base member and the fastening point between the retainer member and the vehicle body are separated, the attachment of the retainer member and the base member is performed. The rigidity was not enough.

  The present invention has been made in view of the above problems, and an object of the present invention is to improve the assembly rigidity of the base member that stores the airbag module and the retainer member that holds the base member from the rear. The object is to provide an airbag device.

According to the side airbag device of the present invention, the above-described problem is a side airbag device provided between a vehicle body and a seat, the airbag being inflatable, and supplying gas into the airbag An air bag module having an inflator, a concave air bag housing portion for housing the air bag module, a base member attached between a vehicle body door and the seat, and the air bag housing portion for the vehicle body. A retainer member that is retained from the rear side, and the base member has a base member main body portion on which the airbag storage portion is provided, and a downward projecting portion that projects downward from the base member main body portion, The retainer member has a retainer mounting portion disposed to face the downward projecting portion, and the retainer mounting portion is fastened to the base member. When, is solved by having the second fastening portion to be fastened to the vehicle body.
According to said side airbag apparatus, the 1st fastening part as a fastening point of a retainer member and a base member, and the 2nd fastening part as a fastening point of a retainer member and a vehicle body are provided under a base member. be able to. Thereby, a 1st fastening part and a 2nd fastening part can be provided close. Therefore, it is possible to improve the assembly rigidity of the base member that stores the airbag module and the retainer member that holds the base member from the rear.

In the above-described side airbag device, the first fastening portion and the second fastening portion may be provided separately from each other.
By doing so, the workability of mounting the base member and the retainer member can be improved.

Said side airbag apparatus WHEREIN: The said 1st fastening part is good to be provided above the said 2nd fastening part.
By doing so, the retainer member can be attached to the vehicle body after the base member is attached to the retainer member. Thereby, the workability | operativity of the assembly | attachment of a side airbag apparatus can be improved.

Said side airbag apparatus WHEREIN: The said retainer member is good to have a bending part formed between a said 1st fastening part and a said 2nd fastening part.
By doing so, the first fastening portion and the second fastening portion can be fastened from different angles. Thereby, the workability | operativity of the assembly | attachment of a side airbag apparatus can be improved further.

Said side airbag apparatus WHEREIN: The said retainer member is good to have a circumferential bead part formed in the position surrounding the said 1st fastening part.
By doing so, it is possible to improve the rigidity of the retainer member where the load is applied when the airbag is deployed. Thereby, stability of deployment of an air bag can be improved.

Said side airbag apparatus WHEREIN: The said bending part is good to be provided in the position which overlaps with the said circumferential bead part.
By doing so, the rigidity of the bent portion can be improved by the circumferential bead portion.

In the above-described side airbag device, the retainer member includes a retainer main body portion that holds the airbag storage portion, and the retainer mounting portion, and the retainer mounting portion extends below the retainer main body portion. The retainer mounting portion may include a main surface portion on which the first fastening portion and the second fastening portion are formed, and a side surface portion provided on both sides of the main surface portion and rising from the main surface portion.
By doing so, the rigidity in the vicinity of the first fastening portion and the second fastening portion to which a large load is applied when the airbag is deployed can be improved.

In the above-described side airbag device, the airbag storage portion has a bottom portion and a side wall portion extending forward from the bottom portion, and the retainer main body portion faces the bottom portion of the airbag storage portion. A retainer rear wall portion, and a retainer side wall portion facing the side wall portion of the airbag storage portion, and is recessed forward of the seat at a corner portion connecting the retainer rear wall portion and the retainer side wall portion. A recess may be formed.
By carrying out like this, it can suppress that the side wall part of an airbag storage part spreads right and left by the impact at the time of airbag deployment.

In the side airbag device, the retainer member may include a third fastening portion fastened to the base member, and the third fastening portion may be provided above the first fastening portion.
By doing so, the retainer member and the base member can be fastened at a plurality of fastening points separated in the vertical direction with respect to the retainer member. Thereby, the attachment rigidity of a retainer member and a base member can be improved.

In the side airbag device, the inflator may be disposed between the first fastening portion and the third fastening portion.
By doing so, it is possible to improve the holding stability of the inflator by providing fastening points on the top and bottom of the inflator. Thereby, stability of deployment of an air bag can be improved.

ADVANTAGE OF THE INVENTION According to this invention, the assembly | attachment rigidity of the base member which stores an airbag module, and the retainer member which hold | maintains a base member from back can be improved.
According to the present invention, the workability of mounting the base member and the retainer member can be improved.
According to the present invention, the retainer member can be attached to the vehicle body after the base member is attached to the retainer member.
According to the present invention, the first fastening portion and the second fastening portion can be fastened from different angles.
According to the present invention, in the retainer member, it is possible to improve the rigidity of a portion to which a load is applied when the airbag is deployed.
According to the present invention, the rigidity of the bent portion can be improved by the circumferential bead portion.
According to the present invention, the rigidity in the vicinity of the first fastening portion and the second fastening portion to which a large load is applied when the airbag is deployed can be improved.
ADVANTAGE OF THE INVENTION According to this invention, it can suppress that the side wall part of an airbag storage part spreads right and left by the impact at the time of airbag deployment.
According to the present invention, the retainer member and the base member can be fastened at a plurality of fastening points separated in the vertical direction with respect to the retainer member.
According to the present invention, the stability of holding the inflator can be improved.

It is explanatory drawing which shows arrangement | positioning of the side airbag apparatus of this embodiment. It is II-II sectional drawing of FIG. It is a figure which shows the attachment structure of the 1st force cloth and the 2nd force cloth with respect to a fracture | rupture part. It is the figure which looked at the side airbag apparatus from diagonally backward. It is a disassembled perspective view of a side airbag apparatus. It is a figure which shows the attachment state of a base member and a retainer member. It is a rear view of a side airbag device. It is VIII-VIII sectional drawing of FIG. It is the elements on larger scale of a retainer member. It is a figure which shows the whole structure of a retainer member. It is the elements on larger scale of a retainer member. It is a rear view of a base member. It is XIII-XIII sectional drawing of FIG. It is a figure which shows the whole structure of a baffle bracket. It is a side view of a baffle bracket. It is a top view of the bundling bracket in the state where the first bundling and the second bundling are attached.

Hereinafter, a side airbag device 1 according to an embodiment of the present invention (hereinafter, this embodiment) will be described with reference to FIGS. 1 to 16.
The side airbag device 1 according to the present embodiment is provided between a seat S provided behind a driver's seat of a vehicle such as an automobile and a vehicle body door D constituting a part of the vehicle body B.
The embodiment described below is merely an example for facilitating the understanding of the present invention, and does not limit the present invention. That is, the shape, dimensions, arrangement, and the like of the members described below can be changed and improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents thereof.

In the following description, the “front-rear direction” means the front-rear direction when viewed from the seated person of the seat S, and is the direction that matches the traveling direction of the vehicle.
The “seat width direction” means the lateral width direction of the seat S, and coincides with the left-right direction when viewed from the seated person of the seat S. The outer side in the seat width direction is the direction toward the vehicle body door D on the side closer to the side airbag device 1, and the inner side in the seat width direction is the opposite direction.
The “vertical direction” means the height direction of the seat S, and coincides with the vertical direction when the seat S is viewed from the front.

<Configuration of Side Airbag Device 1>
The side airbag device 1 of the present embodiment is a device for alleviating an impact applied to a seated person from the side of the vehicle body. As shown in FIG. 1, the side airbag device 1 is disposed between a seat back S1 serving as a backrest portion of the seat S and a vehicle body door D of the vehicle body B in the vehicle body width direction.
In the present embodiment, one side airbag device 1 is arranged on each of the left and right outer sides of the seat S in the vehicle body width direction.

As shown in FIGS. 2 and 5, the side airbag device 1 includes an airbag module 10, a base member 20, and a retainer member 50 as main components.
In FIG. 5, the airbag 11 of the airbag module 10 is omitted.

The airbag module 10 includes an airbag 11 as a bag body that can be inflated and an inflator 12 that supplies gas into the airbag 11 as main components.
As shown in FIGS. 5 and 7, the inflator 12 is a long and substantially cylindrical gas generator, and is arranged to be long in the vertical direction.
Two bolts 13 are attached to the inflator 12 so as to protrude outward from the inflator 12. Although details will be described later, each of the two bolts 13 is passed through the opening 28 of the base member 20, the bolt insertion hole 49 of the baffle bracket 40, and the bolt insertion hole 51 Ca of the retainer member 50, and fastened with the nut 16. . Thereby, the inflator 12, the baffle bracket 40, and the retainer member 50 can each be fastened.

  Note that the airbag 11 is folded during normal operation, that is, when the airbag module 10 is not operating. When an operation signal (ignition power) is input to the inflator 12 via the harness 14, the inflator 12 generates gas and injects the gas into the airbag 11 to inflate the airbag 11. .

Here, the airbag 11 is surrounded by the first force cloth 31 and the second force cloth 32 on the left and right sides in the seat width direction, respectively. The first blanket 31 is also referred to as an inner blanket because it is disposed on the inner side in the seat width direction with respect to the airbag 11. Further, since the second webbing 32 is arranged on the outer side in the seat width direction with respect to the airbag 11, it is also referred to as an outer webbing.
The first webbing 31 and the second webbing 32 are collectively referred to as a webbing 30, and the webbing 30 is a member that guides the deployment direction of the airbag 11 toward the breaking portion 70.

As shown in FIGS. 2 and 3, the first baffle 31 has a first loop-shaped end portion 31 </ b> A as a rear end attached to the baffle bracket 40 and a front end attached to the breaking portion 70 as a tear line. The first stitching portion 31C. Here, the first loop-shaped end portion 31A of the first force cloth 31 is an end portion configured in a loop shape by sewing two pieces of cloth together in the first loop sewing portion 31B.
Similarly, the second baffle 32 includes a second loop-shaped end portion 32A as a rear end attached to the baffle bracket 40 and a second stitching portion 32C as a front end attached to the breaking portion 70 as a tear line. Have. The second loop-shaped end portion 32A of the second force cloth 32 is an end portion configured in a loop shape by sewing two pieces of cloth together at the second loop sewing portion 32B.

The first stitching portion 31C of the first webbing 31 and the second stitching unit 32C of the second webbing 32 are sewn to the breaking portion 70 provided on the skin material 71 that covers the front surface of the airbag module 10. Attached. Specifically, as shown in FIG. 2, the fracture portion 70 of the skin material 71 is attached between the first force cloth 31 and the second force cloth 32.
When the airbag 11 is inflated and deployed, the airbag 11 pulls the first stitched portion 31C of the first force cloth 31 and the second stitched portion 32C of the second force cloth 32 in the direction in which they are separated from each other. The break portion 70 is broken, and the airbag 11 is thereby ejected from the break portion 70. By so doing, when a certain level of impact is applied to the vehicle, the airbag 11 bulges from the break portion 70 between the seat back S1 and the vehicle body door D, thereby reducing the impact applied to the occupant. It becomes possible to do.

  As shown in FIG. 3, the first stitched portion 31 </ b> C of the first blanket 31 and the second stitched portion 32 </ b> C of the second blanket 32 have different vertical lengths. Specifically, the second suture portion 32C is longer than the first suture portion 31C. By doing so, when the airbag 11 is deployed, it is possible to first break the vicinity of the center of the breaking portion 70 and then to bulge and deploy the airbag 11 upward from the vicinity of the center. Moreover, the amount of scattering of the pad 72 as a cushioning material for the seat can be reduced by inflating the airbag 11 from the vicinity of the center of the breaking portion 70.

<Composition of forcebench bracket 40>
Next, the configuration of the webbing bracket 40 that holds the rear ends of the first webbing 31 and the second webbing 32 will be described with reference to FIGS.

The baffle bracket 40 is a metal member having a first extension portion 41, a second extension portion 42, and an attachment portion 43.
A bolt insertion hole 49 through which the bolt 13 of the inflator 12 is inserted is formed in the mounting portion 43, and is fastened to the inflator 12 and the retainer member 50 in a state where the bolt 13 of the inflator 12 is inserted.
As shown in FIG. 2, the attachment portion 43 is arranged in a direction extending in the front-rear direction in the state where the baffle bracket 40 is attached to the base member 20 and the retainer member 50. In this case, the first extension portion 41 is located on the front side of the attachment portion 43, and the second extension portion 42 is located on the rear side of the attachment portion 43.
That is, the first extension portion 41 is a portion that extends from the front end of the attachment portion 43 toward the outside in the sheet width direction. And the 2nd extension part 42 is a part extended toward the sheet | seat width direction inner side from the rear end of the attaching part 43. As shown in FIG.

A first slit portion 45 is formed in the baffle bracket 40 from the attachment portion 43 to the first extension portion 41. Specifically, the first slit portion 45 includes a first opening 45A, a first bent portion 45B, and a first bedding holding portion 45C.
The first opening 45A is a slit region formed from the first end 40A of the mounting portion 43 toward the second end 40B.
The first bent portion 45B is a slit region extending from the end of the first opening 45A opposite to the first end portion 40A toward the first extension portion 41.
The first baffle holding portion 45C is a slit region that is connected to the first bent portion 45B and extends along the longitudinal direction of the first extension portion 41.
It should be noted that the first bent portion 45B is connected to the first bedding holding portion 45C between the longitudinal ends of the first bedding holding portion 45C.

When attaching the first webbing 31 to the webbing bracket 40, the first loop end 31A of the first webbing 31 is connected to the first webbing holding part 45C through the first opening 45A and the first bent part 45B. Pass through. By doing so, as shown in FIG. 16, the first loop-shaped end portion 31A of the first webbing 31 is held by the first webbing holding part 45C.
As described above, since the first bent portion 45B is connected between the longitudinal ends of the first baffle holding portion 45C, the first loop shape held by the first baffle holding portion 45C. The end portion 31A is difficult to come off from the first bedding holding portion 45C.

  Then, after passing the first loop end 31A of the first baffle 31 through the first baffle holding portion 45C, the bolt 13 of the inflator 12 is passed through the bolt insertion hole 49 of the mounting portion 43, and the baffle bracket 40 and the inflator 12 are fixed. Here, since the two bolt insertion holes 49 are formed so as to straddle the first bent portion 45B, the first bent portion 45B of the first slit portion 45 is attached after the inflator 12 is attached to the baffle bracket 40. Is closed by the inflator 12. For this reason, it is possible to suppress the first loop-shaped end portion 31A of the first webbing 31 from coming out of the webbing bracket 40 through the first bent portion 45B.

  Further, a convex portion 41A that protrudes forward is formed around the first webbing holding portion 45C. By forming the convex portion 41A in this way, a gap can be formed in front of the first bedding holding portion 45C. Therefore, it can suppress that the 1st force cloth 31 hold | maintained at the 1st force cloth holding part 45C is pinched | interposed strongly between the force cloth bracket 40 and another member (for example, airbag 11).

  Moreover, the recessed part 47 is formed in the both sides of the 1st bedding holding part 45C in the 1st extension part 41. As shown in FIG. By forming the recess 47 in this way, a gap can be formed behind the first bedding holding portion 45C. For this reason, it is possible to suppress the first webbing 31 held by the first webbing holding part 45C from being strongly sandwiched between the webbing bracket 40 and another member (for example, the first side wall part 23A).

In addition, a second slit portion 46 is formed in the baffle bracket 40 from the attachment portion 43 to the second extension portion 42. Specifically, the second slit portion 46 includes a second opening 46A, a second bent portion 46B, and a second bedding holding portion 46C.
The second opening 46A is a slit region formed from the second end 40B of the attachment portion 43 toward the first end 40A.
The second bent portion 46B is a slit region extending from the end of the second opening 46A opposite to the second end 40B toward the second extending portion 42.
The second webbing holding portion 46 </ b> C is a slit region that is connected to the second bent portion 46 </ b> B and extends along the longitudinal direction of the second extending portion 42.
In addition, between the both ends of the longitudinal direction of the 2nd webbing holding part 46C, the 2nd bending part 46B is connected to the 2nd webbing holding part 46C.

When attaching the second webbing 32 to the webbing bracket 40, the second loop end 32A of the second webbing 32 is connected to the second webbing holding part 46C through the second opening 46A and the second bent part 46B. Pass through. By doing so, as shown in FIG. 16, the second loop-shaped end portion 32A of the second baffle 32 is held by the second baffle holding portion 46C.
As described above, since the second bent portion 46B is connected between both longitudinal ends of the second baffle holding portion 46C, the second loop shape held by the second baffle holding portion 46C. The end portion 32A is difficult to come off from the second bedding holding portion 46C.

  In addition, convex portions 48 are formed on both sides of the second bedding holding portion 46C in the second extending portion 42. Thus, the convex part 48 is formed, and a space | gap can be formed ahead of the 2nd bedding holding part 46C. Therefore, it is possible to suppress the second webbing 32 held by the second webbing holding part 46C from being strongly sandwiched between the webbing bracket 40 and another member (for example, the airbag 11).

  The bedding bracket 40 is formed with a bead portion 44 across the first extension portion 41, the attachment portion 43, and the second extension portion 42. The bead portion 44 has a convex shape on the airbag 11 side. As described above, by providing the bead portion 44 on the baffle bracket 40, the rigidity of the portion pulled to the opposite side by the first baffle 31 and the second baffle 32 can be improved. Thereby, the stability of holding of the first and second webbings 31 and 32 by the webbing bracket 40 can be improved.

Then, as shown in FIGS. 2, 6, and 8, at least a part of the baffle bracket 40 is attached in a state where it overlaps the opening 28 formed in the base member 20.
Specifically, a part of the attachment portion 43 of the baffle bracket 40 and the second extension portion 42 are attached so as to overlap the opening 28.

<Configuration of base member 20>
Next, the configuration of the base member 20 will be described.
The base member 20 is made of a resin plate-like member that serves as a substrate of the side airbag device 1, and stores the airbag module 10 as shown in FIG.
As shown in FIG. 12, the base member 20 includes a base member main body portion 20A in which a concave airbag storage portion 21 for storing the airbag module 10 is formed, and a downward protrusion protruding downward from the base member main body portion 20A. Part 20B.

The base member main body portion 20A includes, as main components, a front surface portion 20Aa that forms an outer side in the sheet width direction than the hanging groove 20Ab provided in a substantially central portion in the sheet width direction, and a hanging groove 20Ab. And an airbag storage portion 21 provided on the inner side in the seat width direction.
The front surface portion 20Aa is provided at a position continuous with the front surface of the seat back S1 of the seat S. The airbag storage unit 21 is provided with a pad 72 in front of the airbag module 10 after storing the airbag module 10. Then, the pad 72 and the front surface portion 20 </ b> Aa are covered with the skin material 71.
Here, as described above, the hanging groove 20 </ b> Ab extending in the vertical direction is formed in the boundary portion between the front surface portion 20 </ b> Aa and the airbag storage portion 21. A plurality of skin hanging slits 27 are formed in the hanging groove 20Ab at predetermined intervals. In other words, the skin suspending slit 27 is formed in a region of the base member 20 adjacent to the airbag storage portion 21.
The end portion of the skin material 71 is passed through the skin suspension slit 27 so that the skin material 71 can be suspended and fixed.
The end portion of the skin material 71 is passed through the skin hanging slit 27 and then the side opposite to the side where the airbag storage portion 21 for storing the airbag module 10 is formed (that is, for skin hanging) It is pulled and fixed from the slit 27 outward in the sheet width direction.

Next, the detail of the structure of the airbag storage part 21 is demonstrated.
The airbag storage portion 21 is formed as a portion having a substantially U-shaped cross section that is recessed rearward of the seat with respect to the front surface portion 20Aa. Specifically, the airbag storage portion 21 includes a bottom portion 22 as a wall portion behind the seat, and a side wall portion 23 extending from the left and right of the bottom portion 22 to the front of the seat.
Of the side walls 23, the side provided on the inner side in the sheet width direction is referred to as a first side wall portion 23 </ b> A, and the side provided on the outer side in the sheet width direction is referred to as a second side wall portion 23 </ b> B.

A first through hole 24 is formed in the bottom portion 22. The first through hole 24 is a round hole, and a flange 25 protruding rearward is formed around the first through hole 24. Specifically, the inner peripheral surface 25 </ b> A of the flange 25 is continuous with the first through hole 24. The flange 25 is inserted into a second through hole 52 of the retainer member 50 described later, whereby the first through hole 24 of the base member 20 and the second through hole 52 of the retainer member 50 face each other ( In detail, it will be arranged at the overlapping position).
As shown in FIG. 4, the harness 14 connected to the inflator 12 is passed through the first through hole 24 and the second through hole 52. Thus, the harness 14 of the airbag module 10 disposed in front of the base member 20 can be passed through the rear side of the base member 20 and the retainer member 50 without bypassing the outside of the base member 20.

Here, the position of the first through hole 24 will be described. As shown in FIG. 7, the first through hole 24 is provided above the upper end 12 </ b> A of the inflator 12.
In FIG. 7, after removing the inflator 12 from the side airbag device 1, the inflator 12 is shown to correspond to the mounting position in the vertical direction.
The first through hole 24 is provided above the opening 28 in the vertical direction.
Further, the first through hole 24 is provided at a position aligned vertically with the boss portion 26 in the vertical direction. Specifically, the first through hole 24 is provided below the boss portion 26.
Further, as shown in FIG. 2, the first through hole 24 is closer to the seat S than the break portion 70 to which the front ends of the first force cloth 31 and the second force cloth 32 are attached in the seat width direction. Provided in position.

  In the base member 20, an opening 28 is formed from the bottom 22 to the first side wall 23A. Specifically, the opening 28 is formed by die-cutting a part of the bottom part 22 and a part of the first side wall part 23A. Thus, by forming the continuous opening 28 in the bottom portion 22 and the first side wall portion 23A, compared with the case where the opening is formed only in either the bottom portion 22 or the first side wall portion 23A, the die cutting is performed. Since there are a plurality of directions, it is easy to perform die cutting.

The opening 28 is formed below the first through hole 24 and at a position where at least a part of the opening 28 and the first through hole 24 overlap in the sheet width direction.
In addition, at least a part of the baffle bracket 40 is disposed with respect to the opening 28.
Specifically, as shown in FIG. 2, the second extending portion 42 and the attachment portion 43 of the baffle bracket 40 are arranged at positions where they overlap the opening 28.

  As shown in FIG. 8, the attachment portion 43 of the baffle bracket 40 is disposed in contact with the first side wall portion 23 </ b> A as the inner surface of the airbag storage portion 21. The upper end 28A of the opening 28 has a semicircular upper edge so that the bolt 13 can be passed therethrough.

  Further, as shown in FIG. 2, the side wall portion front end 23Aa, which is the tip of the first side wall portion 23A, is bent in a U shape. And the outer end part 41B located in the sheet | seat width direction outer side of the 1st extension part 41 of the baffle bracket 40 is provided so that it may wrap around with respect to side wall part front end 23Aa.

  Further, a boss portion 26 protruding rearward is provided above the first through hole 24 in the airbag storage portion 21. The boss portion 26 is formed in a hollow columnar shape, and is passed through the boss portion insertion through-hole 53 of the retainer member 50.

  A bolt insertion hole 29 through which the bolt 15 provided at the upper end of the airbag module 10 is passed is formed above the boss portion 26 in the airbag storage portion 21. The bolt insertion hole 29 is provided at a position facing the upper through hole 58 of the retainer member 50. And the upper part of the airbag module 10, the base member 20, and the retainer member 50 is fastened by the volt | bolt 15, respectively.

A downward projecting portion 20B is provided below the front surface portion 20Aa. A through hole 20Ba is formed in the downward projecting portion 20B. The base member 20 and the retainer member 50 are fixed by fastening the bolts to the through holes 20Ba of the base member 20 and the first fastening portions 61 of the retainer member 50 through bolts.
More specifically, the downward projecting portion 20B of the base member 20 and the retainer mounting portion 60 of the retainer member 50 are fixed.

<Configuration of retainer member 50>
Next, the configuration of the retainer member 50 will be described.
The retainer member 50 is a metal holding member that holds the airbag storage portion 21 of the base member 20 from the rear side of the vehicle body.
As shown in FIGS. 5 and 10, the retainer member 50 includes a retainer main body 51 that holds the airbag storage portion 21, and a retainer mounting portion 60 that is provided below the retainer main body 51.

  The retainer body 51 is formed in a substantially U-shaped cross section. Specifically, the retainer main body 51 extends forward of the seat from the rear wall 51A of the retainer that is disposed to face the bottom 22 of the airbag housing 21 and both ends of the retainer rear wall 51A in the vehicle body width direction. The first retainer side wall 51B and the second retainer side wall 51C are provided.

  A third fastening portion 57, a boss portion insertion through hole 53, a second through hole 52, and a bead portion 56 are formed in the retainer rear wall portion 51A in order from the top to the bottom.

The third fastening portion 57 is a hole formed at a position facing the bolt insertion hole 29 of the base member 20, and is fastened using the bolt 15.
The boss portion insertion through hole 53 is a hole through which the boss portion 26 of the base member 20 is passed, and the boss portion insertion through hole 53 is slightly larger in size than the cross section of the boss portion 26 as shown in FIG. 7. Formed.
The second through hole 52 is a hole formed at a position facing the first through hole 24 and the flange 25 of the base member 20. As shown in FIG. 7, the second through hole 52 is formed to have a size slightly larger than the cross section of the flange 25.
The harness 14 of the airbag module 10 is passed through the second through hole 52 and the first through hole 24 from the front side to the rear side of the side airbag device 1.
The second through hole 52 and the boss portion insertion through hole 53 are formed at positions aligned in the vertical direction. In other words, the second through hole 52 and the boss portion insertion through hole 53 are arranged at a position where at least a part thereof overlaps in the sheet width direction.

  In the retainer rear wall 51A, a bead portion 56 extending in the vertical direction is formed below the second through hole 52. The bead portion 56 is a portion processed so as to be convex rearward of the seat, and as shown in FIG. 7, the bead portion 56 overlaps the inflator 12 attached to the airbag storage portion 21 in the vertical direction. Is provided.

And the 1st retainer side wall part 51B of the retainer main-body part 51 comprises the side wall of a sheet | seat width direction outer side, and the 2nd retainer side wall part 51C comprises the side wall of a sheet | seat width direction inner side.
As shown in FIGS. 5, 7, and 10, a plurality of recesses 55 arranged in the vertical direction are formed at the corners connecting the retainer rear wall 51 </ b> A and the first retainer side wall 51 </ b> B. Yes. The recess 55 is a portion that is recessed forward of the seat.
Similarly, a plurality of recesses 55 are formed at the corners connecting the retainer rear wall 51A and the second retainer side wall 51C.
By forming the recess 55 as described above, deformation of the first retainer side wall 51B and the second retainer side wall 51C with respect to the retainer rear wall 51A can be suppressed. Thereby, it can suppress that the 1st retainer side wall part 51B and the 2nd retainer side wall part 51C spread to right and left with respect to the retainer rear wall part 51A.

In addition, as shown in FIGS. 5, 7, and 10, the first retainer side wall 51 </ b> B is provided with a harness attachment portion 54 that holds a metal fitting attached to the harness 14.
The harness attachment portion 54 may be an opening or may include a metal fitting attached to the opening.
The harness attachment portion 54 is provided at a position higher than the second through hole 52 in the vertical direction. Specifically, the harness attachment portion 54 is provided at substantially the same height as the boss portion insertion through-hole 53 in the vertical direction.
And since the harness attachment part 54 is provided in the position higher than the 2nd through-hole 52, the harness 14 which let the 2nd through-hole 52 pass will be hold | maintained in the state bent upwards.

  A retainer mounting portion 60 that extends downward is provided on the lower end portion 59 of the main body 51 of the retainer main body 51. In the present embodiment, the retainer mounting portion 60 is joined to the lower end portion 59 of the main body by welding, but is not limited thereto. For example, the retainer main body 51 and the retainer mounting portion 60 may be joined using a fastener such as a bolt and a nut, or the retainer main body 51 and the retainer mounting portion 60 may be integrally formed.

The retainer mounting portion 60 is a metal plate-like member that extends downward while curving from the inner side to the outer side in the sheet width direction.
As shown in FIG. 10, the retainer mounting portion 60 has a main surface portion 60 </ b> A that constitutes a surface, and a side surface portion 60 </ b> B in which both ends of the main surface portion 60 </ b> A are bent. In other words, the side surface portion 60B is a wall portion that rises vertically from both end portions of the main surface portion 60A.

60 A of main surface parts are formed so that a width | variety may become narrow toward the downward direction from upper direction, and the circumferential bead part 63 is provided in the position which surrounds the 1st fastening part 61 in the approximate center part of an up-down direction. The circumferential bead portion 63 is formed in a slightly convex shape toward the front of the seat.
Further, a bent portion 64 is formed near the lower end portion of the retainer mounting portion 60 so as to cross the circumferential bead portion 63. Specifically, the retainer mounting portion 60 is bent toward the front of the seat at the bent portion 64. The bent portion 64 is formed in a state inclined downward from the inner side to the outer side in the sheet width direction.

  Moreover, the 1st fastening part 61 and the 2nd fastening part 62 are formed in the lower end part vicinity of 60 A of main surface parts. Specifically, the first fastening portion 61 and the second fastening portion 62 are provided below the curved portion 60Aa in which the main surface portion 60A is curved in the sheet width direction.

The first fastening portion 61 is a hole provided at a position facing the through hole 20Ba of the downward projecting portion 20B of the base member 20. Specifically, the retainer member 50 (retainer mounting portion 60) and the base member 20 are fixed by inserting a bolt into the first fastening portion 61 and the through hole 20Ba and fastening with a nut.
The first fastening portion 61 is formed inside the circumferential bead portion 63 and above the bent portion 64.

Further, the second fastening portion 62 is formed below the circumferential bead portion 63 in the main surface portion 60A.
The second fastening part 62 is a part fastened to the vehicle body B (for example, a seat frame of the seat S, a tire house, or the like). Specifically, the second fastening portion 62 is a through-hole formed in the retainer mounting portion 60, and the retainer member 50 ( A retainer mounting portion 60) is fixed to the vehicle body B.
As described above, both the first fastening portion 61 and the second fastening portion 62 are provided at positions separated from each other in the vicinity of the lower end portion of the retainer member 50.
Since the first fastening portion 61 is provided above the bent portion 64 and the second fastening portion 62 is provided below the bent portion 64, the fastening operation between the first fastening portion 61 and the second fastening portion 62 is performed. Can be done at different angles.
Moreover, since the 1st fastening part 61 is formed in the inside of the circumferential bead part 63, the attachment rigidity of the retainer member 50 and the base member 20 can be improved.

  In addition, as shown in FIG. 11, at the lower end of the retainer mounting portion 60, a folded portion 60Ba is formed at the upper end of the side surface portion 60B. The folded portion 60Ba is a portion where the upper end of the side surface portion 60B is folded downward, thereby improving the rigidity of the side surface portion 60B. Therefore, the mounting rigidity between the retainer member 50 and the vehicle body B can be improved.

<Summary>
The main features of the side airbag device 1 according to the present embodiment described above are as follows.

[1] The side airbag device 1 is provided between the vehicle body B and the seat S. The side airbag device 1 includes an airbag module 10 having an inflatable airbag 11, an inflator 12 that supplies gas to the interior of the airbag 11, and a concave airbag storage for storing the airbag module 10. The base member 20 which has the part 21 and is attached between the vehicle body door D and the seat S, and the retainer member 50 which hold | maintains the airbag storage part 21 from the vehicle body rear side are provided. The base member 20 includes a base member main body 20A in which the airbag storage portion 21 is provided, and a downward projecting portion 20B that projects downward from the base member main body 20A. The retainer member 50 includes a retainer mounting portion 60 that is disposed to face the downward projecting portion 20B. The retainer mounting portion 60 has a first fastening portion 61 fastened to the base member 20 and a second fastening portion 62 fastened to the vehicle body B.
According to the side airbag device 1 described above, the first fastening portion 61 as a fastening point between the retainer member 50 and the base member 20 and the second fastening portion 62 as a fastening point between the retainer member 50 and the vehicle body B are provided. It can be provided below the base member 20. Thereby, the 1st fastening part 61 and the 2nd fastening part 62 can be provided close. Therefore, the assembly rigidity of the retainer member 50 and the base member 20 can be improved.

[2] In the side airbag device 1 described above, the first fastening portion 61 and the second fastening portion 62 are provided apart from each other.
By doing so, the workability of attaching the retainer member 50 and the base member 20 can be improved.

[3] In the side airbag device 1 described above, the first fastening portion 61 is provided above the second fastening portion 62.
By doing so, the retainer member 50 can be attached to the vehicle body B after the base member 20 is attached to the retainer member 50. Thereby, the workability | operativity of the assembly | attachment of the side airbag apparatus 1 can be improved.

[4] In the side airbag device 1 described above, the retainer member 50 includes the bent portion 64 formed between the first fastening portion 61 and the second fastening portion 62.
By doing so, the first fastening portion 61 and the second fastening portion 62 can be fastened from different angles. Thereby, the workability | operativity of the assembly | attachment of the side airbag apparatus 1 can be improved further.

[5] In the side airbag device 1 described above, the retainer member 50 has the circumferential bead portion 63 formed at a position surrounding the first fastening portion 61.
By doing so, it is possible to improve the rigidity of the retainer member 50 where the load is applied when the airbag is deployed. Thereby, stability of deployment of air bag 11 can be improved.

[6] In the side airbag device 1 described above, the bent portion 64 is provided at a position overlapping the circumferential bead portion 63.
By doing so, the rigidity of the bent portion 64 can be improved by the circumferential bead portion 63.

[7] In the side airbag device 1 described above, the retainer member 50 includes a retainer main body 51 that holds the airbag storage portion 21 and a retainer mounting portion 60. The retainer mounting portion 60 extends below the retainer body 51, and the retainer mounting portion 60 is provided on the main surface portion 60A on which the first fastening portion 61 and the second fastening portion 62 are formed, and on both sides of the main surface portion 60A. And a side surface portion 60B rising from the main surface portion 60A.
By doing so, the rigidity in the vicinity of the first fastening portion 61 and the second fastening portion 62 to which a large load is applied when the airbag is deployed can be improved.

[8] In the side airbag device 1 described above, the airbag storage portion 21 includes the bottom portion 22 and the side wall portion 23 extending forward from the bottom portion 22. The retainer body 51 includes a retainer rear wall 51A that faces the bottom 22 of the airbag storage 21 and a retainer sidewall that faces the side wall 23 of the airbag storage 21 (first retainer sidewall 51B, second retainer). Side wall 51C). A concave portion 55 that is recessed forward of the seat is formed at a corner portion that connects the retainer rear wall portion 51A and the retainer side wall portion.
By carrying out like this, it can suppress that the side wall part 23 of the airbag storage part 21 spreads right and left by the impact at the time of airbag deployment.

[9] In the side airbag device 1 described above, the retainer member 50 includes the third fastening portion 57 fastened to the base member 20, and the third fastening portion 57 is provided above the first fastening portion 61. It is done.
By doing so, the retainer member 50 and the base member 20 can be fastened at a plurality of fastening points separated in the vertical direction with respect to the retainer member 50. Thereby, the attachment rigidity of the retainer member 50 and the base member 20 can be improved.

[10] In the side airbag device 1 described above, the inflator 12 is disposed between the first fastening portion 61 and the third fastening portion 57.
In this way, by providing fastening points on the top and bottom of the inflator 12, the stability of holding the inflator 12 can be improved. Thereby, stability of deployment of air bag 11 can be improved.

<Other embodiments>
The present invention is not limited to the above embodiment.
For example, in the above-described embodiment, the example in which the side airbag device 1 is provided in the rear seat of the vehicle has been described. However, the side airbag device 1 may be provided for the front seat and the second and subsequent rear seats. .
Further, the side airbag device 1 is not limited to an automobile, and can be applied to vehicles such as electronics, buses, airplanes, and ships.

B body D body door S seat S1 seat back 1 side airbag device 10 airbag module 11 airbag 12 inflator 12A upper end 13 bolt 14 harness 15 bolt 16 nut 20 base member 20A base member main body 20Aa front surface 20Ab hanging groove 20B downward projecting part 20Ba through hole 21 airbag housing part 22 bottom 23 side wall part 23A first side wall part 23Aa side wall part front end 23B second side wall part 24 first through hole 25 flange 25A inner peripheral surface 26 boss part 27 Slit 28 Opening portion 28A Upper end of opening portion 29 Bolt insertion hole 30 Force cloth 31 First force cloth 31A First loop end (rear end)
31B 1st loop sewing part 31C 1st sewing part (front end)
32 2nd force cloth 32A 2nd loop-shaped edge part (rear edge)
32B Second loop sewing portion 32C Second stitching portion (front end)
40 forcebench bracket 40A first end portion 40B second end portion 41 first extension portion 41A convex portion 41B outer end portion 42 second extension portion 43 attachment portion 44 bead portion 45 first slit portion 45A first opening portion 45B 1st bending part 45C 1st bedding holding part 46 2nd slit part 46A 2nd opening 46B 2nd bending part 46C 2nd bedding holding part 47 Recessed part 48 Convex part 49 Bolt insertion hole 50 Retainer member 51 Retainer main part 51A Retainer rear wall 51B First retainer side wall (retainer side wall)
51C Second retainer side wall (retainer side wall)
51Ca Bolt insertion hole 52 Second through hole 53 Through hole for insertion of boss part 54 Harness attachment part 55 Concave part 56 Bead part 57 Third fastening part 58 Upper through hole 59 Lower end part of main body 60 Retainer attachment part 60A Main surface part 60Aa Curved part 60B Side surface Part 60Ba Folding part 61 First fastening part 62 Second fastening part 63 Circumferential bead part 64 Bending part 70 Breaking part 71 Skin material 72 Pad

Claims (10)

A side airbag device provided between a vehicle body and a seat,
An airbag module comprising: an inflatable airbag; and an inflator for supplying gas into the airbag;
A base member that has a concave airbag storage for storing the airbag module, and is attached between a vehicle body door and the seat;
A retainer member for holding the airbag storage portion from the rear side of the vehicle body,
The base member is
A base member main body provided with the airbag storage;
A downward projecting portion projecting downward from the base member main body,
The retainer member is
A retainer mounting portion disposed to face the downward projecting portion;
The retainer mounting portion is
A first fastening portion fastened to the base member;
A side airbag device comprising: a second fastening portion fastened to the vehicle body.   The side airbag device according to claim 1, wherein the first fastening portion and the second fastening portion are provided apart from each other.   The side airbag device according to claim 2, wherein the first fastening portion is provided above the second fastening portion.   The side airbag device according to any one of claims 1 to 3, wherein the retainer member has a bent portion formed between the first fastening portion and the second fastening portion.   The side airbag device according to claim 4, wherein the retainer member has a circumferential bead portion formed at a position surrounding the first fastening portion.   The side airbag device according to claim 5, wherein the bent portion is provided at a position overlapping the circumferential bead portion. The retainer member is
A retainer main body for holding the airbag storage;
The retainer mounting portion,
The retainer mounting portion extends below the retainer body portion,
The retainer mounting portion is
A main surface portion on which the first fastening portion and the second fastening portion are formed;
The side airbag device according to any one of claims 1 to 6, further comprising a side surface portion provided on both sides of the main surface portion and rising from the main surface portion. The airbag storage part has a bottom part, and a side wall part extending forward from the bottom part,
The retainer body is
A retainer rear wall facing the bottom of the airbag storage;
A retainer side wall portion facing the side wall portion of the airbag storage portion,
The side airbag device according to claim 7, wherein a concave portion recessed in front of the seat is formed at a corner portion connecting the rear wall portion of the retainer and the side wall portion of the retainer. The retainer member has a third fastening portion fastened to the base member,
The side airbag device according to any one of claims 1 to 8, wherein the third fastening portion is provided above the first fastening portion. The side airbag device according to claim 9, wherein the inflator is disposed between the first fastening portion and the third fastening portion.

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