JP6328820B2 - Side airbag device - Google Patents

Description

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

  Conventionally, as a side airbag device, an inflator for injecting gas into an airbag, a resin cover that covers the airbag and the inflator from the front side, and a metal box for attaching the inflator to the cover It is known (see Patent Document 1). Specifically, in this technique, when an airbag is inflated with an inflator, the airbag destroys the thin portion of the resin cover and inflates and deploys the airbag.

JP 2009-40328 A

  By the way, in the side airbag apparatus as described above, it is conceivable to adopt a configuration in which the airbag is inflated and deployed by breaking the sewing portion of the skin material with the airbag. In such a structure, one end of the baffle is fixed near the sewing portion of the skin material, and the other end of the baffle is held by a member on the inflator side, so that the bundling of the sewn portion is expanded when the airbag is inflated and deployed. It is conceivable to break from a fixed part. However, in this case, since a large force is applied to the other end portion of the webbing by the deployment pressure of the airbag, it is desired that the training be held more firmly.

  Then, an object of this invention is to provide the side airbag apparatus which can hold | maintain the edge part by the side of the inflator of a buff (regulation member) firmly.

  Another object of the present invention is to improve the degree of freedom of arrangement of the engaging member provided at the end portion of the bundling, improve the maintainability of the side airbag device, and improve the attachment rigidity of the inflator. And

The present invention relates to a side air bag device provided between the vehicle body and the seat, to case defining an inflator injecting gas into the air bag, the external shape of the side air bag device to solve the above An inflator fixing member having a wall fixed to the rear side of the case and disposed on the rear side of the inflator, an attachment member for fixing the inflator to the inflator fixing member, and a skin covering the case Between the inflator and the inflator fixing member, and a fixing member that is fixed around the sewing portion of the material and the skin material, and is provided at a restriction member for restricting a deployment direction of the airbag, and an end portion of the restriction member. comprising an engaging member which is held, a portion where an end portion of the regulating member of the engaging member is attached, is disposed in front of the wall, viewed from the longitudinal direction Characterized in that overlap the wall.

  According to this configuration, the end of the restricting member can be firmly held on the inflator side by sandwiching the engaging member between the inflator and the inflator fixing member.

Further, in the above-described configuration, the attachment member includes a male screw portion provided in the inflator, and the inflator fixing member is formed with a bulging portion that protrudes in a direction opposite to a direction in which the male screw portion protrudes. And the said engagement member and the said bulging part may be arrange | positioned in order of the said engagement member and the said bulging part toward the direction where the said external thread part protrudes.

Moreover, in the above-described configuration, the restriction member may overlap the inflator fixing member when viewed from the left-right direction.

Moreover, in the above-described configuration, the engaging member and the inflator fixing member may be disposed behind the axis of the inflator.

In the above-described configuration, the inflator fixing member may be provided with a convex portion that protrudes toward the inflator, and the convex portion may be fixed to the inflator by the attachment member.

In the above-described configuration, the attachment member may include a plurality of male screw portions provided on the inflator, and a plurality of the convex portions may be provided corresponding to the plurality of male screw portions.

In the above-described configuration, the attachment member includes a male screw portion provided in the inflator and a nut screwed into the male screw portion, and the male screw portion is provided in the inflator fixing member. It may protrude from the inflator fixing member through the perforated hole.

Moreover, the above-mentioned structure WHEREIN : The said inflator fixing member may have the flange part extended toward the front from the right-and-left both ends of the said wall.

In the above-described configuration, the engagement member includes an engagement portion that engages with a hole formed in the inflator, and a flange portion that extends in the vertical and horizontal directions from the rear end portion of the engagement portion. It may be.

  According to the present invention, the end of the restricting member can be firmly held on the inflator side by sandwiching the engaging member between the inflator and the inflator fixing member.

It is a perspective view which shows the side airbag apparatus which concerns on this embodiment. It is sectional drawing which shows a side airbag apparatus. It is a disassembled perspective view which shows the structure around an inflator. It is a figure which shows the position of the clip with respect to the axis line of an inflator. It is sectional drawing which shows the modification 1 of a side airbag apparatus. It is a figure which shows the position of the clip in the modification 1. It is a figure which shows the modification 2 which changed the position of the clip. It is sectional drawing which shows the modification 3 of a side airbag apparatus. It is sectional drawing which shows the modification 4 of a side airbag apparatus. They are the perspective view (a) which shows the modification 5 of a side airbag apparatus, and sectional drawing (b).

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the side airbag device SA is formed in a long shape extending in the vertical direction, and is provided between the vehicle body C and the rear seat S. In the present invention, front and rear, left and right, and top and bottom are based on a passenger sitting on the rear seat S. Since the left and right side airbag devices SA have a symmetrical structure, the right side airbag device SA will be described below as a representative, and the left side airbag device SA will be described. Omitted.

  As shown in FIG. 2, the side airbag apparatus SA includes a case 10, an airbag unit 20 accommodated in the case 10, a fixing plate 30 as an example of an inflator fixing member, and a cushion member made of urethane foam or the like. 41 and a skin material 42 made of synthetic leather or fabric.

  The case 10 is a resin member that defines the external shape of the side airbag device SA, and is formed in a long shape extending in the vertical direction. The case 10 has a front wall portion 11 and a concave shape portion 12 formed so as to be recessed backward from the front wall portion 11.

  A cushion member 41 and a skin material 42 are attached to the front wall portion 11 so as to cover from the front side. The skin material 42 is sewn with a thread or the like at a position facing the concave portion 12 in the front-rear direction. As shown in FIG. 1, the sewing portion 42 </ b> A in which the end portions of the skin material 42 are sewn together with a thread or the like extends in the vertical direction from the lower end side of the side airbag device SA and then inward in the left-right direction. It is formed to extend to.

  Then, in the vicinity of the sewing portion 42A, specifically, in the vicinity of a part of the sewing portion 42A formed in an elongated shape in the substantially vertical direction, as shown in FIG. An end portion of a webbing 51 as an example of a regulating member for fixing is fixed. In the present embodiment, the webbing 51 is a long cloth that is harder to extend than the skin material 42, and is formed with a width substantially the same as the width of the clip 52 described later.

  The concave portion 12 includes a bottom wall 13 as an example of a mounting wall, and a side wall 14 extending from the periphery of the bottom wall 13 to the front side (the side opposite to the fixed plate 30). As shown in FIG. 3, the bottom wall 13 is formed in a rectangular plate shape that is orthogonal to the front-rear direction and is elongated in the up-down direction, and at two places as an example of the first opening, A mounting hole 13A is formed. Each attachment hole 13A is a circular hole for attaching the airbag unit 20 and the fixing plate 30 to the bottom wall 13, and has a shape and a size such that two convex portions 33 of the fixing plate 30 to be described later can be fitted.・ It is formed in position.

  The side wall 14 is formed in a rectangular cylindrical shape, and penetrates as an example of a second opening for passing the webbing 51 from the inside of the recessed portion 12 to the outside on the left side (the inner side in the left-right direction). A hole 14A is formed.

  As shown in FIG. 2, the airbag unit 20 is provided in the recessed portion 12 of the case 10, and mainly includes an airbag 21 and an inflator 22 that injects gas into the airbag 21. Yes. The inflator 22 is provided in the airbag 21 and includes a substantially cylindrical gas generator 23 and a retainer 24 that holds the gas generator 23 as shown in FIG.

  The retainer 24 is configured by forming a sheet metal into a substantially rectangular cylindrical shape, and holds the gas generator 23 therein. A rear surface 24A, which is a contact surface with the bottom wall 13 of the retainer 24, is a plane parallel to the front surface 13B of the bottom wall 13, and two male screw portions 24B as an example of an attachment member are located at the rear side. Are integrally provided so as to protrude. Specifically, the two male screw portions 24B are provided side by side with a space in the vertical direction (the axial direction of the inflator 22). Each male screw portion 24 </ b> B protrudes out of the airbag 21 through a hole (not shown) formed in the airbag 21.

The fixing plate 30 is a sheet metal provided on the rear side (opposite to the inflator 22) of the bottom wall 13 of the concave shaped portion 12, and includes a rectangular main body portion 31 as an example of a wall, And a flange portion 32 extending forward. The main body 31 is orthogonal to the front-rear direction and is elongated in the up-down direction. Two bottomed cylindrical convex portions 33 projecting forward are formed at appropriate positions of the main body portion 31.

  Each convex portion 33 is formed so as to be recessed toward the inflator 22 by press working, and protrudes toward the retainer 24 through each attachment hole 13 </ b> A of the bottom wall 13 of the concave shape portion 12. One insertion hole 33 </ b> A for inserting each male screw portion 24 </ b> B of the retainer 24 is formed at the tip of each convex portion 33. That is, each insertion hole 33A is formed at a position / size corresponding to each male screw portion 24B.

  Then, a nut N as an example of an attachment member is screwed into each male screw portion 24B that is inserted into each insertion hole 33A and protrudes rearward from the fixing plate 30, so that the retainer 24 and the fixing plate 30 are connected. In a state where the bottom wall 13 is sandwiched, the retainer 24 and each convex portion 33 of the fixing plate 30 are fastened with the very thin airbag 21 interposed therebetween. Thus, since the retainer 24 and each convex part 33 of the fixing plate 30 are fastened through the very thin airbag 21, the substantially metals are directly fastened. Therefore, the retainer 24 and the fixing plate 30 Can be firmly fixed, and the mounting rigidity of the inflator 22 with the bottom wall 13 can be improved.

  In addition, the front end surface of each convex portion 33 is located at a position slightly retracted rearward from the front surface 13B of the bottom wall 13 in a state where the main body portion 31 of the fixed plate 30 is in contact with the bottom wall 13 of the concave shape portion 12. It is desirable that they are arranged. According to this, when the retainer 24 and the fixing plate 30 are fastened, the bottom wall 13 can be firmly held between the retainer 24 and the fixing plate 30, so that the inflator 22 is firmly attached to the bottom wall 13. Can be attached.

  Moreover, the diameter of each convex part 33 is formed in the substantially same magnitude | size as the diameter of each attachment hole 13A of the bottom wall 13 of the concave-shaped part 12. FIG. Thereby, the positioning of the fixing plate 30 with respect to the bottom wall 13 can be performed by fitting the convex portions 33 into the mounting holes 13 </ b> A of the bottom wall 13 of the concave shape portion 12.

  The flange portion 32 is bent forward from both ends in the left-right direction of the main body portion 31, thereby increasing the rigidity of the main body portion 31. In addition, each flange portion 32 is formed at a position that can be engaged with the outer surface of the concave portion 12, and thereby the positioning of the fixing plate 30 in the left-right direction with respect to the bottom wall 13 is also performed by each flange portion 32. It is possible.

  An appropriate position of the main body 31, specifically, a position between the convex portions 33 in the vertical direction and a position shifted to the left side of the convex portions 33 is fixed to the end portion of the webbing 51. An engagement hole 31A is formed in which a clip 52 as an example of an engagement member is engaged. The clip 52 is a substantially T-shaped member made of resin and has an engagement portion 52A that engages with the engagement hole 31A, and a flange portion 52B that extends in the vertical and horizontal directions from the front end of the engagement portion 52A. Have.

  And the site | part around the engaging hole 31A of the main-body part 31 is the concave accommodating part 31B for accommodating the flange part 52B. Accordingly, as shown in FIG. 2, the bottom wall 13 is sandwiched between the retainer 24 and the main body 31, and the flange portion 52B of the clip 52 is sandwiched between the bottom wall 13 and the accommodating portion 31B. It is possible.

  That is, the clip 52 is sandwiched between the inflator 22 and the fixed plate 30 together with the bottom wall 13. Thus, the clip 52 is sandwiched between the inflator 22 and the fixing plate 30, so that the end portion of the bundling 51 can be firmly held on the inflator 22 side.

  Further, the clip 52 is attached to the engaging hole 31A arranged at the above-described position, so that as shown in FIG. 4, from the front-rear direction (the direction in which the bottom wall 13 is sandwiched between the inflator 22 and the fixing plate 30). It is arranged so as not to overlap with the axis AL of the inflator 22 when viewed. In other words, the clip 52 is disposed so as not to overlap a straight line connecting the two male screw portions 24B when viewed from the fastening direction of the male screw portion 24B and the nut N. In FIG. 4, for convenience, the case 10 is omitted and the inflator 22 is indicated by a two-dot chain line.

  Thus, by arranging the clip 52 so as not to overlap the axis AL of the inflator 22 when viewed from the fastening direction of the male screw portion 24B or the like, the clip 52 can be attached regardless of the attachment of the inflator 22, The maintainability of the airbag device SA can be improved.

  Specifically, the clip 52 is provided at a position avoiding each convex portion 33. As a result, the clip 52 can be stably supported by the portion of the main body 31 that is not the convex portion 33.

  The clip 52 is provided between the two male screw portions 24B in the vertical direction. As a result, the clip 52 and the bottom wall 13 can be firmly clamped at the portion of the retainer 24 and the fixing plate 30 that is difficult to bend between the male screw portions 24B. It can be held more firmly.

As described above, according to the present embodiment, in addition to the effects described above, the following effects can be achieved.
By making the rear surface 24A of the retainer 24 a plane parallel to the front surface 13B of the bottom wall 13, the range in which the fastening force of the male screw portion 24B and the nut N affects can be widened. Can be improved.

  By forming the through-hole 14A for passing the bundling 51 in the side wall 14, the rigidity of the bottom wall 13 can be increased as compared with, for example, a structure in which a through-hole is formed in the bottom wall. The portion can be held more firmly on the inflator 22 side.

  Since the convex portion 33 for directly fastening the metal fixing plate 30 and the metal retainer 24 is provided integrally with the fixing plate 30, for example, a metal cylindrical collar is insert-molded in the case, and the color Compared to the structure in which the retainer and the fixing plate are fastened via the hood, the number of parts can be reduced and the case 10 can be easily formed.

  Although the embodiments of the present invention have been described above, the present invention can be implemented with appropriate modifications as shown in other embodiments below. In the following description, the same reference numerals are given to members having substantially the same structure as in the above embodiment, and the description thereof is omitted.

  In the above-described embodiment, the clip 52 is sandwiched between the case 10 and the fixed plate 30, but the present invention is not limited to this. For example, as shown in FIG. 5, the clip is inserted between the inflator 22 and the fixed plate 30. 52 may be sandwiched. In FIG. 5, for the sake of convenience, the male screw portion 24 </ b> B and the like that should be visible on the back side of the clip 52 are omitted.

  Specifically, in the form of FIG. 5, a hole 13 </ b> C is formed at a position facing the inflator 22 in the bottom wall 13 of the case 10, and protrudes toward the inflator 22 at a position corresponding to the hole 13 </ b> C of the fixed plate 30. By forming the bulging portion 34, the fixing plate 30 can be brought close to the inflator 22, and the clip 52 can be sandwiched between them.

  Specifically, the hole 13C is provided between the two mounting holes 13A described above, and the bulging part 34 is provided between the two convex parts 33 described above. As described above, the clip 52 can be held more firmly by sandwiching the clip 52 directly between the inflator 22 and the fixing plate 30, so that the end portion of the baffle 51 is more firmly attached to the inflator 22 side. Can be held in.

  In the form of FIG. 5, as shown in FIG. 6, the clip 52 is disposed so as to overlap the axis AL of the inflator 22 when viewed from the fastening direction of the male screw portion 24 </ b> B and the like. According to this, since the clip 52 can be clamped between the inflator 22 and the fixing plate 30 in a balanced manner, the end portion of the webbing 51 can be more firmly held on the inflator 22 side.

  The clip 52 may be provided on the outer side in the axial direction than the two male screw portions 24B, for example, as shown in FIG. In this case, the position of the accommodating portion 31B and the engagement hole 31A (not shown) in the above embodiment may be arranged on the outer side in the axial direction than the two male screw portions 24B.

  In the above-described embodiment, the clip 52 is engaged with the fixing plate 30, but the present invention is not limited to this. For example, as shown in FIG. 8, the clip 52 is engaged with the hole 15 formed in the case 10. Also good. Specifically, in the form of FIG. 8, the hole 15 is formed in the case 10 instead of providing the engagement hole 31 </ b> A in the above embodiment. Even in this configuration, the clip 52 can be indirectly sandwiched between the inflator 22 and the fixed plate 30 via the bottom wall 13.

  Further, as shown in FIG. 9, the clip 52 may be engaged with a hole 24 </ b> C formed in the retainer 24. Specifically, in the form of FIG. 9, an extension 24D extending along the bottom wall 13 is formed in a part of the retainer 24, and a hole 24C is formed in the extension 24D. Further, the hole 16 is formed in the bottom wall 13, and the bulging portion 35 protruding toward the retainer 24 is formed at a position corresponding to the hole 16 of the fixing plate 30, thereby bringing the fixing plate 30 closer to the retainer 24. The clip 52 can be held between them. Even in this configuration, the clip 52 can be sandwiched between the inflator 22 and the fixed plate 30.

  In the above-described embodiment, the clip 52 is exemplified as the engaging member. However, the present invention is not limited to this. For example, a metal plate 53 as shown in FIGS. 10A and 10B is used as the engaging member. You may attach to the edge part of the cloth 51. FIG. Specifically, in the form of FIG. 10, the plate 53 is formed with a slit 53A for attaching the webbing 51 and an engagement hole 53B that engages with the male screw portion 24B penetrating.

  The convex portion 33 formed on the fixed plate 30 is formed lower by the thickness of the plate 53. In this embodiment, the male screw portion 24B is passed through the engagement hole 53B of the plate 53 in this order and the insertion hole 33A of the convex portion 33 in this order, and then the nut N is screwed into the male screw portion 24B, thereby fixing the inflator 22 to the inflator 22. The plate 53 can be sandwiched between the plate 30.

  In the above embodiment, the bottom wall 13 of the concave portion 12 is exemplified as the mounting wall, but the present invention is not limited to this, for example, when the stepped portion is retracted from the front wall of the case to the rear side. A wall that is lowered by one step on the rear side of the stepped portion may be used as the mounting wall.

  In the embodiment, the plate-like fixing plate 30 is exemplified as the inflator fixing member, but the present invention is not limited to this, and a thick member that is not plate-like may be used as the inflator fixing member.

  In the above embodiment, the male screw part 24B integrally formed on the retainer 24 and the nut N screwed to the male screw part 24B are exemplified as the attachment member. However, the present invention is not limited to this, for example It may be another fastening member constituted by the formed female screw portion and a screw screwed into the female screw portion, a clip that engages with the retainer and the fixing plate, and holds these.

  In the above embodiment, the convex portion 33 is formed by press working. However, the present invention is not limited to this. For example, when the fixing plate is formed by casting, the portion formed thicker than other portions is convex. It is good also as a part.

  In the embodiment, the first opening is a hole (attachment hole 13A), but the present invention is not limited to this, and may be, for example, a notch that opens to one end of the attachment wall. Further, the second opening is not limited to the hole (through hole 14A) as in the above embodiment, and may be a notch that opens to one end of the side wall, for example.

  In the said embodiment, although the buff 51 of the width substantially the same as the width | variety of the clip 52 was illustrated as a control member, this invention is not limited to this, For example, a buff wider than a clip may be sufficient. In this case, a plurality of clips may be provided at the end portion of one blanket, and these clips may be sandwiched between the inflator and the inflator fixing member. The number of regulating members may be plural.

  In the embodiment, two pairs of mounting members (male screw portion 24B and nut N) are provided. However, the present invention is not limited to this, and three or more pairs may be provided.

10 Case 21 Airbag 22 Inflator 24B Male thread part 30 Fixing plate
31 body part 42 skin material 42A sewing part 51 force cloth 52 clip C vehicle body N nut S rear seat SA side airbag device

Claims (9)

A side airbag device provided between a vehicle body and a seat ,
An inflator for injecting gas into the airbag;
And to case which defines the external shape of the side air bag device,
An inflator fixing member fixed to the rear side of the case and having a wall disposed on the rear side of the inflator;
An attachment member for fixing the inflator to the inflator fixing member;
A skin covering the case;
A regulating member that is fixed around the sewing portion of the skin material and regulates the deployment direction of the airbag;
An engagement member provided at an end of the restriction member and sandwiched between the inflator and the inflator fixing member ,
The side airbag device characterized in that a portion of the engaging member to which the end of the regulating member is attached is disposed on the front side of the wall and overlaps the wall when viewed from the front-rear direction . The mounting member includes a male screw portion provided in the inflator,
The inflator fixing member is formed with a bulging portion that protrudes in a direction opposite to the direction in which the male screw portion protrudes,
  2. The side according to claim 1, wherein the engaging member and the bulging portion are arranged in the order of the engaging member and the bulging portion in a direction in which the male screw portion protrudes. Airbag device. The side airbag device according to claim 1, wherein the restriction member overlaps the inflator fixing member when viewed from the left-right direction. The side airbag device according to any one of claims 1 to 3, wherein the engagement member and the inflator fixing member are disposed rearward of the axis of the inflator. The inflator fixing member is provided with a convex portion protruding toward the inflator,
  The side airbag device according to any one of claims 1 to 4, wherein the convex portion is fixed to the inflator by the mounting member. The mounting member includes a plurality of male screw portions provided on the inflator,
6. The side airbag device according to claim 5, wherein a plurality of the convex portions are provided corresponding to the plurality of male screw portions. The mounting member includes a male screw part provided in the inflator, and a nut screwed into the male screw part,
  The side airbag device according to any one of claims 1 to 8, wherein the male screw portion projects from the inflator fixing member through a hole provided in the inflator fixing member. The side airbag device according to any one of claims 1 to 7, wherein the inflator fixing member has a flange portion extending forward from left and right ends of the wall. The said engaging member has an engaging part engaged with the hole formed in the said inflator, and a flange part extended in the up-down-and-left-right direction from the rear-end part of the said engaging part. The side airbag device according to any one of claims 8 to 9.

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