JP2011131765A - Mounting structure of airbag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting structure of an airbag improving work efficiency of a mounting work for mounting the airbag to a vehicle body. <P>SOLUTION: The airbag 3 provided on an edge of a roof 12 of a vehicle 1 in a folded state is attached to a vehicle body 11. An airbag device 2 includes a bracket 4 disposed on a vehicle interior side of a mounting piece 31 provided on the airbag 3, a washer 5 having a lock projection 52 engaged to an engaging portion 43 formed on the bracket 4 and provided on the side close to the vehicle body 11 of the mounting piece 31, and a fastening member 6 fastened to the vehicle body 11 from the vehicle interior side via the bracket 4 and the washer 5. The fastening member 6 maintains a state where the mounting piece 31 is clasped by the bracket 4 and the washer 5 by locking the lock projection 52 to the lock portion 43 and fastens the bracket 4 to the vehicle body 11 to fix the airbag 3 to the vehicle body 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an airbag mounting structure for mounting an airbag installed in a folded state on the edge of a vehicle roof to the vehicle body side.

  2. Description of the Related Art Conventionally, a so-called curtain airbag device is known that protects a passenger's head by deploying an airbag in a curtain shape on a side surface of a vehicle interior when a vehicle collides or rolls over (for example, Patent Document 1). reference). As disclosed in Patent Document 1, an airbag of a conventional curtain airbag device is provided with attachment pieces (attachment portions) at a plurality of locations at the upper end of the airbag, and the attachment pieces are made of a pair of sheet metal materials. It is fixed to the vehicle body with bolts and nuts via a mounting bracket.

  As described in Patent Document 1, a conventional mounting bracket for mounting an airbag is caulked and fixed to an inner plate disposed on the inner side of the vehicle and formed with a caulking portion and a locking claw, and the caulking portion. It consists of two metal members having a caulking portion and an outer plate disposed on the vehicle body side with an airbag mounting piece interposed in the inner plate.

  When fixing the airbag mounting piece to the vehicle body with the mounting bracket, the caulking portion of both is clamped and fixed while sandwiching the mounting plate between the inner plate and the outer plate. The stop piece is hooked into the hole in the car body and bolted.

Japanese Patent No. 3160670 (FIGS. 1 to 6 and FIG. 8)

However, in the mounting bracket for attaching the conventional airbag as described in Patent Document 1 to the vehicle body, when the airbag is attached to the vehicle body, the inner plate and the outer plate are interposed and the caulking of both is performed. It is necessary to work by caulking and fixing the parts.
For this reason, when fixing the inner plate and the outer plate to each other, it is necessary to perform a caulking work using a dedicated tool for caulking work, so that there are many working tools and man-hours to use, and workability is poor. There was a problem.

  Then, this invention makes it a subject to provide the attachment structure of the airbag which can improve the workability | operativity of the attachment operation | work at the time of attaching an airbag to a vehicle body.

  In order to solve the above problems, the airbag mounting structure according to claim 1 is an airbag mounting structure for mounting an airbag installed in a folded state on an edge of a vehicle roof to a vehicle body. A bracket disposed on the vehicle interior side of the mounting piece provided on the airbag, and a locking projection that engages with an engaging portion formed on the bracket, and is disposed on the vehicle body side of the mounting piece. And a fastening member fastened to the vehicle body via the bracket and the washer from the inside of the vehicle, and the fastening member engages the engaging portion and the locking convex portion. Thus, the state in which the mounting piece is held between the bracket and the washer is held, the bracket is fastened to the vehicle body, and the airbag is fixed to the vehicle body.

  According to the first aspect of the present invention, the bracket is formed with the engaging portion, and the washer is formed with the locking projection that engages with the engaging portion. When the airbag is fixed to the vehicle body by the fastening member, first, an airbag mounting piece is interposed between the bracket and the washer, and the engaging portion and the locking convex portion are engaged, and the bracket and the washer. And hold the mounting piece in a sandwiched state. Thereafter, the fastening member is fastened to the vehicle body via a bracket and a washer, thereby fixing the airbag to the vehicle body. For this reason, the caulking process which crimps the brackets conventionally performed becomes unnecessary. Moreover, since the attachment piece and the washer are fixed and integrated, the bracket can be fixed to the vehicle body at a time without supporting the attachment piece and the washer. As a result, the attachment work of the airbag is simplified, and the workability of the attachment work can be improved.

  The airbag mounting structure according to claim 2 is the airbag mounting structure according to claim 1, wherein the bracket has a protrusion having the engaging portion formed on the outer surface of the vehicle. The attachment piece is formed with a through hole into which the protrusion is inserted.

  According to the second aspect of the present invention, the bracket has a projection formed on the outer surface of the vehicle on which the washer is arranged, and the through hole of the attachment piece of the airbag is inserted into the projection. The mounting piece is sandwiched between the bracket and the washer. For this reason, since a bracket and a washer can be fixed to the attachment piece of an airbag, it becomes easy to perform the attachment operation | work which attaches them to a vehicle body with a fastening member.

  The airbag mounting structure according to claim 3 is the airbag mounting structure according to claim 2, wherein a surface of the bracket outside the vehicle is engaged with a locking portion formed on the vehicle body. A locking piece for stopping is formed.

  According to the third aspect of the present invention, the bracket is formed with the locking piece for locking to the locking portion formed on the vehicle body, so that the locking piece is locked to the locking portion of the vehicle body. Thus, the fastening member can be temporarily fixed in a state where it is positioned at a position where the fastening member is fixed to the vehicle body. Further, the locking piece also serves as a detent that suppresses rotation of the bracket when the fastening member is fastened and fixed to the vehicle body. For this reason, a fastening member can be fastened to a vehicle body, without holding a bracket, a washer, and an attachment piece by hand. As a result, the working efficiency of the fastening work can be improved and the fastening work can be facilitated.

  The airbag mounting structure according to claim 4 is the airbag mounting structure according to claim 2 or claim 3, wherein the protrusion is formed in a substantially polygonal column shape, The protrusion is formed in a substantially polygonal shape, and the washer has a rotation preventing hole formed in a substantially polygonal shape in which the protrusion is engaged.

  According to the fourth aspect of the present invention, the projection of the bracket, the through hole of the airbag, and the rotation prevention hole of the washer are each formed in a substantially polygonal shape, so that the projection has the through hole and the rotation prevention hole. When fitted externally, the bracket, the airbag and the washer will not rotate relative to each other. For this reason, when rotating a fastening member and fastening to a vehicle body, it can suppress that a bracket, an airbag, and a washer rotate.

  The airbag attachment structure according to claim 5 is the airbag attachment structure according to any one of claims 1 to 4, wherein the fastening member is provided on a surface of the bracket on the vehicle inner side. A protruding portion that protrudes larger in the vehicle interior direction than the head of the vehicle is formed.

According to the fifth aspect of the present invention, the projecting portion that protrudes larger in the vehicle interior direction than the head of the fastening member is formed on the vehicle inner surface of the bracket, so that the fastening member can be an impact wrench or the like. Even when the tool engaged with the head of the fastening member comes off from the head when tightening with the tool of the tool, the tool hits the protruding portion, so that the tool is prevented from hitting the interior material etc. Can do.
In addition, the projecting portion can be easily held when the bracket is attached to the vehicle body, and also serves as a dedicated pressing portion for fixing the bracket to the vehicle body while pushing the bracket by hand. It becomes easy to perform the installation work.

  The airbag mounting structure according to claim 6 is the airbag mounting structure according to any one of claims 1 to 5, wherein the bracket is formed of resin, and the washer is In addition to being formed of metal or resin, an elastic piece that is in contact with the mounting portion of the vehicle body is integrally formed on the outer peripheral portion.

  According to the invention described in claim 6, since the bracket is made of resin, it is possible to reduce damage to the vehicle body when the bracket is fixed to the vehicle body. In addition, the washer is integrally formed with an elastic piece that contacts the mounting portion of the vehicle body on the outer peripheral portion, so that when the bracket, the airbag mounting piece and the washer are mounted on the vehicle body, the elastic piece elastically holds the vehicle body. It is fixed to the pressed state. For this reason, a bracket, an attachment piece, and a washer can be fixed to a vehicle body without rattling. As a result, the attachment piece of the airbag can be attached to the vehicle body in a stable state.

  The airbag mounting structure according to claim 7 is the airbag mounting structure according to any one of claims 1 to 6, wherein the fastening member is inserted into the bracket. A member insertion hole is formed, and a collar is provided in the fastening member insertion hole.

  According to invention of Claim 7, the bracket can improve the intensity | strength of a fastening member insertion hole by providing the collar in the fastening member insertion hole.

  The airbag mounting structure according to the present invention can improve the workability of the mounting work when mounting the airbag to the vehicle body.

It is a figure which shows the attachment structure of the airbag which concerns on embodiment of this invention, and is a schematic side view which shows the installation state of an airbag apparatus and a bracket. It is an expansion disassembled perspective view which shows the attachment state of the bracket and washer in the attachment structure of the airbag which concerns on embodiment of this invention. It is an expansion disassembled perspective view which shows the attachment state of the bracket and washer in the attachment structure of the airbag which concerns on embodiment of this invention. It is a left side expanded side view of a bracket. It is an enlarged plan view of a bracket. It is a right side enlarged side view of a bracket. It is BB expanded sectional drawing of FIG. It is an AA expanded sectional view of FIG. It is a figure which shows the modification of the attachment structure of the airbag which concerns on embodiment of this invention, and is an expansion disassembled perspective view which shows the attachment state of a bracket and a washer. It is a figure which shows the modification of the attachment structure of the airbag which concerns on embodiment of this invention, and is a principal part expanded horizontal sectional view.

Next, with reference to FIGS. 1-8, an example of the attachment structure of the airbag which concerns on embodiment of this invention is demonstrated.
Hereinafter, the description will be made assuming that the traveling direction of the vehicle is “front”, the backward direction is “rear”, and the vehicle width direction is “left” and “right”. First, before describing the airbag mounting structure, a vehicle, a vehicle body, and an airbag device provided with the airbag will be described.

≪Vehicle configuration≫
As shown in FIG. 1, the vehicle 1 includes an airbag device 2 that includes windows on the left and right sides of the vehicle body 11 and includes airbags 3 that are deployed to cover the left and right windows.
In addition, the vehicle 1 should just be a motor vehicle which has a window, and the model etc. of the vehicle 1 are not specifically limited. Hereinafter, the airbag apparatus 2 will be described by taking a passenger car as an example.
Further, the vehicle 1 on which the airbag device 2 is mounted is, for example, a car provided with a single row of seats only in the front row seats, or a vehicle provided with two rows of seats (not shown) in the front row seats and the rear row seats. It can also be used in the same way for a vehicle having three or more rows of seats, but hereinafter, the present invention will be described with reference to a vehicle 1 having three rows of seats consisting of a front row seat, a middle row seat, and a rear row seat. Embodiments of the invention will be described.

<Body structure>
As shown in FIG. 1, the vehicle body 11 includes, for example, a front pillar 13 provided on the front side of a front row seat (not shown) and a center pillar 14 provided near the center between the front row seat and the middle row seat (not shown). The upper side of the quarter pillar 15 provided between the middle row seat and the rear row seat (not shown) and the rear pillar 16 provided on the rear side of the rear row seat are connected by a roof side rail 17 and a floor (not shown) (Not shown) and the roof 12 are connected. A door opening 11a is provided between the front pillar 13 and the center pillar 14 of the vehicle body 11, and a side door on the front row seat side is disposed in the door opening 11a. Between the center pillar 14 and the quarter pillar 15 of the vehicle 1, there is a door opening 11b, and a side door for the rear row seat is disposed.

<Configuration of roof side rail>
As shown in FIG. 1, the roof side rail 17 is a frame member that forms the periphery of the upper portion 11c of the door openings 11a and 11b. The upper side is joined to the roof 12 (see FIG. 1), and the lower side is the center pillar. 14 is joined to a pillar such as a quarter pillar 15. Each of the roof side rails 17 includes an inner member (not shown), a center member, and an outer member. For example, a vehicle body fixing bracket 10 (see FIG. 2) to be described later is fixed to the roof side rail 17.

<Configuration of the body fixing bracket>
As shown in FIG. 2, the vehicle body fixing bracket 10 is a metal to which the bracket 4 and the fastening member 6 are attached via the washer 5 and the attachment piece 31 when the attachment piece 31 of the airbag 3 is fixed to the vehicle body 11. It is a thick plate member. The vehicle body fixing bracket 10 is fixed to the vehicle body 11 such as the roof side rail 17 by welding means or the like. The vehicle body fixing bracket 10 includes a fixing hole 10a into which the fastening member 6 is inserted, and locking portions 10b and 10b including substantially rectangular holes into which the pair of locking pieces 44 and 44 of the bracket 4 are inserted and locked. And a nut N that is welded and fixed to the surface of the fixing hole 10a on the vehicle body side.

<Roof configuration>
As shown in FIG. 1, the roof 12 is a member that forms a ceiling portion of the vehicle 1, and includes a not-shown interior material, an inner member, a center member, and an outer member. The lower end portion of the roof 12 and the upper end portion of the roof side rail 17 are joined by welding or the like. On the side of the roof 12, the upper end of the airbag 3 is disposed.

≪Configuration of airbag device≫
As shown in FIG. 1, the airbag device 2 is configured such that, when a side impact of the vehicle 1 is applied to the side of the vehicle 1 during a side collision or the like, the door openings 11a and 11b and the pillars 13 and 13 This is a curtain airbag device that deploys the airbag 3 disposed in the upper part 11c of the 14, 15, 16 to protect the head of the occupant and the like. The airbag device 2 is disposed along the roof side rail 17 at a portion from the front pillar 13 through the roof side rail 17 to the rear pillar 16, for example.

The airbag device 2 includes an airbag 3, a cover body 23 that is attached by fixing the cover body fixing bracket 8 to the vehicle body 11 with a fixture (not shown), and lateral directions such as side collision and rollover of the vehicle 1. A collision detection sensor (not shown) that detects the applied force, and an inflator that instantly inflates the airbag 3 by causing the ignition device to burn the gas generating agent and generate high-pressure gas by an impact signal from the collision detection sensor (not shown) 21, a metal pipe P that connects the airbag 3 and the inflator 21, and an electronic control unit (not shown) that controls the airbag device 2.
Since the airbag device 2 has the same configuration and operation on the left and right sides of the vehicle body 11 and operates in the same manner, only the device installed on the right side will be described and the device installed on the left side. The description of is omitted.

≪Airbag configuration≫
As shown in FIG. 1, the airbag 3 is a bag body that is deployed between a window glass of a side door and a seated occupant to restrain and protect the occupant from the side direction. The airbag 3 is normally folded in a long shape and stored in the cover body 23 and restrained by the binding band 22 together with the cover body 23, and the cover body 23 is fixed to the vehicle body by a fixture and a clip (not shown). It is fixed to the roof side rail 17 (vehicle body 11 side) via a bracket 10 (see FIG. 2). Further, the airbag 3 is provided with an attachment piece 31 for fixing the airbag 3 to the vehicle body 11 at the upper end of the outer peripheral portion. The airbag 3 is inflated by supplying gas from the inflator 21 at the time of a collision, breaks the binding band 22, pushes and opens interior materials (not shown) such as roof lining (not shown), and the gas is It is formed to come off and wither.

<Configuration of mounting piece>
As shown in FIG. 1, the attachment piece 31 is a projecting piece formed of a thick cloth-like belt-like member in a strap shape (see FIG. 2). A plurality of the mounting pieces 31 are installed in the airbag 3 in a state of projecting upward from the respective upper end portions of the inflating portions that are deployed toward the front seat side, the middle row seat, and the rear row seat.
As shown in FIG. 2, the attachment piece 31 has a base end portion on the lower end side fixed to the upper end of the base fabric of the airbag 3 by sewing means, and a tip end portion on the upper end side from the extraction hole 23 a of the cover body 23. Has been pulled out. A substantially rectangular through hole 31a into which the protrusion 42 (see FIG. 3) of the bracket 4 for attaching the airbag is inserted is formed at the tip of the mounting piece 31.

≪Composition of cover body≫
As shown in FIG. 1, the cover body 23 is a resin case for housing the airbag 3 in a folded state, and the extraction hole 23a (see FIG. 2) is formed on the upper surface. The cover body 23 is formed of a substantially U-shaped long member that opens downward (see FIG. 2), and extends in the front-rear direction of the vehicle body 11. The cover body 23 is installed on the inner surface of the roof side rail 17 extending from the front pillar 13 to the rear pillar 16 with the opening portion directly below, and is covered with an interior material (not shown) such as roof lining.

≪Bracket structure≫
As shown in FIGS. 2 and 3, the bracket 4 is a member for fixing the attachment piece 31 provided on the airbag 3 to the vehicle body fixing bracket 10 (vehicle body 11). In the bracket 4, a substrate portion 41, a protrusion 42, an engaging portion 43, locking pieces 44, 44, a fastening member insertion hole 45, and a protruding portion 46 are integrally formed mainly by resin. . As shown in FIGS. 4 to 6, the bracket 4 is formed in a symmetrical shape as a whole and is disposed on the vehicle inner side of the attachment piece 31.
Yes.

<Configuration of the substrate>
The substrate portion 41 is a portion that supports the vehicle body side surface of the mounting piece 31 around the through hole 31a, and is made of, for example, a substantially oval thick plate material. As shown in FIGS. 2 and 4, a fastening member insertion hole 45, a pin insertion hole 41 a formed when the engaging portion 43 is molded, and a fastening member insertion hole are formed on the inner side of the base plate portion 41. Reinforcing protrusions 41b formed radially from 45 toward the outer peripheral portion, reinforcing edge portions 41c protruding from the outer peripheral portion toward the vehicle inner side, and projecting portions connected to the reinforcing edge portions 41c 46, 46 are formed.
As shown in FIGS. 3 and 4, a fastening member insertion hole 45, a protrusion 42, an engagement portion 43, and locking pieces 44 and 44 are formed on the vehicle exterior side of the base plate portion 41.

<Structure of protrusion>
As shown in FIGS. 3, 5, and 6, the protrusion 42 is formed by fitting a substantially rectangular through hole 31 a formed in the attachment piece 31 and a substantially rectangular rotation preventing hole 51 of the washer 5. It is a part to be supported. The protrusion 42 is formed in a horizontally long rectangular prismatic shape, and protrudes from the surface of the board portion 41 outside the vehicle by a length equal to or longer than the thickness of the mounting piece 31 and the thickness of the washer 5. ing. Engaging portions 43 and 43 are formed at the upper and lower central portions of the protrusion 42, and a cylindrical fastening member insertion hole 45 is formed at the central portion.
In addition, the protrusion 42 should just be formed in the substantially polygonal column shape, and does not need to be a square in side view.

<Configuration of engaging portion>
As shown in FIG. 3, the engaging portions 43, 43 are recesses that engage with the locking convex portions 52, 52 of the washer 5, and are formed, for example, at two locations above and below the outer peripheral surface of the protrusion 42. The engaging portions 43, 43 are configured such that when the through hole 31 a and the rotation prevention hole 51 are externally fitted to the protrusion 42 and the washer 5 is pushed into the bracket 4 side, the locking convex portion 52 automatically engages. It has become.

<Configuration of locking piece>
The locking pieces 44, 44 are a pair of left and right temporarily fixing elastic locking pieces that are inserted into and locked to a locking portion 10 b 10 b provided on the vehicle body fixing bracket 10 (vehicle body 11). Projecting from the left and right ends toward the vehicle body (outside). The left and right locking pieces 44, 44 include a U-shaped support piece 44 a as viewed from the side protruding from the upper and lower end portions on the base end side toward the fastening member insertion hole 45 side, and a distal end portion. The claws 44b formed on the outside are integrally formed. The mounting piece 31 is disposed between the locking pieces 44. The locking pieces 44, 44 also have a detent function for preventing the mounting piece 31 from rotating relative to the vehicle body fixing bracket 10 when and after the bracket 4 is fixed to the vehicle body fixing bracket 10. Fulfill. Further, the locking pieces 44, 44 also have a positioning function for matching the fastening member insertion hole 45 of the bracket 4 with the fixing hole 10a of the vehicle body fixing bracket 10 (see FIG. 2).

<Configuration of fastening member insertion hole>
As shown in FIG. 2, the fastening member insertion hole 45 is a hole into which the male screw portion 61 of the fastening member 6 is inserted. The inner edge of the fastening member insertion hole 45 is reinforced by forming a thick portion in a ring shape so as to border the peripheral edge. As shown in FIG. 3, the outer edge of the fastening member insertion hole 45 is reinforced by continuously forming a square protrusion 42 on the periphery of the edge.

<Configuration of protrusion>
As shown in FIG. 2, the protrusions 46, 46 are formed so as to protrude from the upper and lower edges on the vehicle inner side of the bracket 4 to the vehicle inner side direction more than the head 62 of the fastening member 6. For this reason, the protrusions 46 and 46 prevent the other parts from coming into contact with the head 62 of the fastening member 6 or when the fastening member 6 is fastened with a tool such as an impact wrench. There is a function of preventing the tool engaged with the portion 62 from coming off the head 62 and hitting the protruding portion to damage the interior member. Further, the protruding portion 46 is formed in a shape suitable for picking and pressing with a finger when the locking piece 44 is pushed into the locking portion 10b by hand and locked.

≪Configuration of washer≫
As shown in FIG. 3, the washer 5 is a quadrangular frame-like plate member that is externally fitted to the protrusion 42, and is disposed outside the mounting piece 31. In the washer 5, a washer portion 54, a rotation prevention hole 51, a locking projection 52, and an elastic piece 53 are integrally formed of metal or resin.
The washer portion 54 is a portion that holds the attachment piece 31 in contact with the peripheral portion of the through hole 31 a of the attachment piece 31 when the bracket 4, the attachment piece 31, and the washer 5 are fixed to the vehicle body fixing bracket 10. The washer portion 54 is formed in a flat plate shape that is flat with respect to the mounting piece 31.
The rotation preventing hole 51 is a substantially rectangular hole with which the protrusion 42 is engaged, and is formed inside the washer portion 54.
The locking convex portion 52 is a convex portion that fits into the engaging portion 43, and includes a pair of claw-like protrusions that are formed to project from the upper and lower edges of the rotation prevention hole 51 toward the center.
The elastic piece 53 is a protruding piece that functions as a spring washer that comes into contact with the surface of the vehicle body fixing bracket 10 when the washer 5 is attached between the attachment piece 31 and the vehicle body fixing bracket 10. The elastic piece 53 is composed of four pieces that are formed obliquely in the front-rear and up-down directions from the outer peripheral portion of the washer portion 54 to the vehicle outer side.

≪Composition of fastening member≫
The fastening member 6 is a member for fixing the bracket 4 to the vehicle body fixing bracket 10 (vehicle body 11) with the attachment piece 31 and the washer 5 interposed therebetween, and is composed of, for example, a general-purpose bolt or a welding bolt. For example, a male screw part 61, a head part 62, a flange part 63, and a cylindrical part 64 are integrally formed on the fastening member 6. The fastening member 6 is inserted into the fastening member insertion hole 45, the through hole 31 a, the rotation prevention hole 51, and the fixing hole 10 a in this order from the inside of the vehicle and screwed into the nut N so that the attachment piece 31 is attached. It is fixed to the vehicle body 11 side.
The cylindrical portion 64 is a portion that is not threaded, and is formed in a stepped shape with a larger diameter than the male screw portion 61 so as to be fitted into the fastening member insertion hole 45, and the strength is improved.

≪Action≫
Next, with reference to FIG. 1 and FIG. 2, the effect | action of the attachment structure of the airbag which concerns on embodiment of this invention is demonstrated with the attachment piece 31 of the airbag 3 to the vehicle body 11, and the procedure.
In this case, first, as shown in FIG. 1, the airbag 3 is folded into an elongated shape and stored in the cover body 23. Then, in a state where the attachment piece 31 of the airbag 3 is pulled out from the lead-out hole 4a (see FIG. 2) of the cover body 23, a plurality of locations of the airbag 3 and the cover body 23 are held by the binding band 22, and the airbag 3 is bound so that it does not fall off from the cover body 23.

  Next, a clip (not shown) formed integrally with the cover body 23 is pushed into a locking hole (not shown) of the roof side rail 17 from the inside of the vehicle, and the cover body 23 is temporarily fixed to the vehicle body 11. . Subsequently, as shown in FIG. 3, the through holes 31 a of the attachment pieces 31 provided at a plurality of positions on the upper end portion of the airbag 3 are externally fitted to the protrusions 42 of the bracket 4, and further, the washer 5 is prevented from rotating. The hole 51 is fitted on the protrusion 42 and pushed into the vehicle interior. Then, the locking projections 52 and 52 engage with the engaging portions 43 and 43, and the attachment piece 31 is sandwiched between the bracket 4 and the washer 5.

  Next, as shown in FIG. 2, the locking pieces 44, 44 of the bracket 4 are inserted into the locking portion 10b of the vehicle body fixing bracket 10, and the protrusions 46, 46 are pressed with a finger to fix the claw 44b to the locking portion. 10b is engaged with the outer edge of the vehicle. Then, the bracket 4, the attachment piece 31, and the washer 5 can be temporarily fixed to the roof side rail 17.

  Subsequently, the male thread portion 61 of the fastening member 6 is inserted into the fastening member insertion hole 45, the through hole 31a, and the fixing hole 10a from the inside of the vehicle and screwed into the nut N, whereby the attachment piece 31 of the airbag 3 is roofed. It can be firmly fixed to the side rail 17.

When the fastening member 6 is rotated and screwed into the nut N, the bracket 4 is temporarily fixed by engaging the two locking pieces 44 and 44 with the locking portions 10 b and 10 b of the vehicle body fixing bracket 10. Therefore, since it does not rotate together even if the fastening member 6 is rotated, it is not necessary to hold it by hand. At this time, the mounting piece 31 and the washer 5 rotate because the rectangular through hole 31a and the rotation prevention hole 51 are fitted on the rectangular protrusion 42, and are thus firmly fixed to the bracket 4. There is nothing. In particular, the movement of the mounting piece 31 in the front-rear direction is restricted by the fact that the front and rear edges are disposed between the pair of locking pieces 44, 44.
As a result, the bracket 4, the attachment piece 31 and the washer 5 do not move, so that the work of screwing the fastening member 6 can be easily performed, and the work efficiency can be improved.

Further, the mounting piece 32 fixed to the vehicle body 11 has the elastic piece 53 pressed against the vehicle body fixing bracket 10 and presses the washer portion 54 against the mounting piece 31 around the through hole 31a. And the outer surface of the bracket 4 are firmly fixed to each other with no backlash.
As a result, the mounting piece 32 is configured to lock the mounting piece 31 of the airbag 3 by the locking of the bracket 4 to the vehicle body 11 by the locking pieces 44, 44, the fixing to the vehicle body by the fastening member, and the elasticity of the washer 5. The vehicle body 11 can be firmly fixed in a stable state.

  Further, the three cover body fixing brackets 8 attached to the cover body 23 are fixed to the roof side rail 17 with a fixing tool. The cover body 23 is covered with roof lining (not shown), and the bracket 4, the pipe P, the inflator 21 and the pillars are covered with pillar garnish (not shown), so that the airbag 3 and the vehicle body 11 of the airbag device 2 can be provided. Installation is complete.

  The attachment piece 31 of the airbag 3 fixed to the vehicle body fixing bracket 10 on the vehicle body 11 side in this way is prevented from rotating by the bracket 4 as described above when the vehicle 1 is not subjected to the impact in the side surface direction. Since the fastening member 6 and the washer 5 are fixed to the vehicle body 11 without rattling, the attachment piece 31 is firmly fixed without being displaced or moved due to vibration or the like during traveling of the vehicle 1.

  Further, even when an impact of a predetermined magnitude or larger is applied to the side surface of the vehicle 1 and the airbag 3 is deployed, the fastening force of the fastening member 6 is maintained. It is possible to maintain a strongly fixed state. For this reason, the bracket 4, the washer 5, and the fastening member 6 can firmly hold the airbag 3 being deployed in a suspended state so that the airbag 3 can be deployed in a predetermined state. 3 is further improved in stability of the development characteristics.

  As described above, the airbag 3 firmly fixed to the vehicle body 11 by the bracket 4, the washer 5, and the fastening member 6 is directed to the left side of the vehicle interior toward the side of the front row seat, the middle row seat, and the rear row seat (not shown). Expands downward as if a curtain was hung on. Accordingly, the airbag 3 can restrain and protect the head of the occupant and can suppress the occupant from jumping out of the vehicle.

  The airbag device 2, the bracket 4, the washer 5, and the fastening member 6 have the same configuration and action on the left side body of the vehicle 1, and an impact of a predetermined level or more is applied to the right side portion of the vehicle 1. Operates in the same way as when loaded.

≪Modification≫
The present invention is not limited to the above-described embodiment, and various modifications and changes can be made within the scope of the technical idea. The present invention extends to these modifications and changes. Of course. Hereinafter, modifications of the embodiment will be described. In addition, the already demonstrated structure attaches | subjects the same code | symbol and abbreviate | omits the description.

As shown in FIGS. 9 and 10, a metal collar 9 may be provided in the fastening member insertion hole 45 of the bracket 4 described in the embodiment. In this way, the strength inside and around the fastening member insertion hole 45 can be improved to prevent the fastening member insertion hole 45 from being damaged or deformed, and the durability is also improved. Can be made.
The collar 9 can reduce the load applied to the fastening member 6A inserted into the collar 9 and protect the fastening member 6A from external force. For this reason, the fastening member 6A makes it possible to use a general-purpose bolt with the male screw portion 61A and the cylindrical portion 64A having the same diameter.

  In this case, the collar 9 includes a cylindrical portion 91 disposed in a state of being fitted in the fastening member insertion hole 45, a first flange portion 92 formed at the inner end portion of the cylindrical portion 91, and the cylindrical portion 91. A second flange portion 93 formed at the vehicle outer end is integrally formed. The collar 9 is integrally formed by insert molding in the fastening member insertion hole 45 of the resin bracket 4, for example.

≪Other variations≫
Further, the vehicle body fixing bracket 10 may be omitted. That is, the vehicle body fixing bracket 10 only needs to be fixed to the vehicle body 11, and may be directly fixed to the vehicle body 11 such as the roof side rail 17, or may be another member fixed to the vehicle body 11. It doesn't matter.

  The vehicle 1 can be applied to any type of automobile as long as the airbag 3 can be installed on the upper portions 11c of the door openings 11a and 11b.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Airbag apparatus 3 Airbag 4 Bracket 5 Washer 6, 6A Fastening member 9 Collar 10 Car body fixing bracket (vehicle body attachment part)
10a Fixing hole 10b Locking part 11 Car body 12 Roof 31 Mounting piece 31a Through hole 42 Projection 43 Engaging part 45 Fastening member insertion hole 46 Projection part 51 Anti-rotation hole 52 Locking convex part 53 Elastic piece 62 Head

Claims (7)

An airbag mounting structure for mounting an airbag installed in a folded state on the edge of a vehicle roof to a vehicle body,
A bracket disposed on the inner side of the mounting piece provided on the airbag;
A locking projection that engages with an engaging portion formed on the bracket, and a washer disposed on the vehicle body side of the mounting piece;
A fastening member fastened to the vehicle body via the bracket and the washer from the inside of the vehicle,
The fastening member holds the mounting piece between the bracket and the washer by engaging the engaging portion and the locking projection, and fastens the bracket to the vehicle body. An airbag mounting structure, wherein the airbag is fixed to the vehicle body. The bracket is formed with a protrusion having the engaging portion on the outer surface of the vehicle,
The airbag mounting structure according to claim 1, wherein the mounting piece is formed with a through hole into which the protrusion is inserted.   The airbag mounting structure according to claim 2, wherein a locking piece that is locked to a locking portion formed on the vehicle body is formed on a surface of the bracket outside the vehicle. The protrusion is formed in a substantially polygonal column shape,
The through hole is formed in a substantially polygonal shape with which the protrusion is engaged,
The airbag mounting structure according to claim 2 or 3, wherein the washer is provided with a rotation prevention hole formed in a substantially polygonal shape with which the protrusion is engaged.   5. The protruding portion that protrudes larger in the vehicle inner direction than the head of the fastening member is formed on the vehicle inner surface of the bracket. The airbag mounting structure described in 1. The bracket is formed of resin,
6. The washer according to claim 1, wherein the washer is formed of metal or resin, and an elastic piece that is in contact with the mounting portion of the vehicle body is integrally formed on an outer peripheral portion. The mounting structure of the described airbag. The bracket has a fastening member insertion hole into which the fastening member is inserted,
The airbag mounting structure according to any one of claims 1 to 6, wherein the fastening member insertion hole is provided with a collar.

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