JP2008296645A - Arrangement structure of head protecting airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To smoothly deploy an head protecting airbag body into a vehicle room even when the width of a roof rail garnish is relatively small. <P>SOLUTION: The roof rail garnish 14 as an interior member in a region ranging from a terminal 12A of a ceiling material 12 to the outside of a vehicle in the cross direction is locked to the side of a roof side rail 16. It is isolated from the side of the roof side rail 16 and deployed to the inside of the vehicle room by the developing pressure of the airbag body 10. The terminal 12A of the ceiling material 12 is deformed to the inside of the vehicle room with the deployment of the roof rail garnish 14 and put into the condition of being deployed to the inside of the vehicle room together with the roof rail garnish 14. At this time, the roof rail garnish 14 which is connected to a reverse face 12F (a peripheral site) of the ceiling material 12 via a flexible band body 48 is deployed to the inside of the vehicle room together with the terminal 12A of the ceiling material 12. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an arrangement structure of a head protection airbag device.

As a conventional head protection airbag device, an airbag module is stored in a roof rail garnish that covers a terminal of a ceiling material (roof head lining), and when an inflator is activated, an attachment portion (connection portion) of the roof rail garnish is A configuration is disclosed in which a portion of the hinge portion provided on the outside of the vehicle opens to the vehicle lower side around the hinge portion due to the deployment pressure of the airbag, and the airbag is deployed to the inside of the vehicle (Patent Document). 1).
JP-A-2005-75321

  However, when the width dimension of the roof rail garnish is relatively small, it is difficult to secure a sufficient range for the roof rail garnish to open when the airbag bag body is deployed. It was difficult.

  In view of the above-described facts, an object of the present invention is to enable a head protection airbag bag body to be smoothly deployed in a vehicle compartment even when the width dimension of a roof rail garnish is relatively small.

  According to the first aspect of the present invention, the airbag bag for protecting the head is arranged in a folded state along the roof side rail and is configured to be deployed in a curtain shape into the vehicle interior when supplied with an inflation gas. And a terminal part in the vehicle width direction is configured to be deformable to the vehicle interior side by the deployment pressure of the airbag bag body. The ceiling member is disposed as an interior member with respect to a region on the outer side in the vehicle width direction from the terminal portion of the ceiling member in a state where the ceiling member is connected to a peripheral portion by a flexible belt-like body, and is connected to the roof side rail side. And a roof rail garnish configured to be detached from the roof side rail side by a deployment pressure of the airbag bag body.

  In the arrangement structure of the head protection airbag device according to claim 1, when the folded airbag bag body starts to inflate and deploy when supplied with the inflation gas, the deployment pressure thereof is increased to the roof rail garnish and the ceiling. Acts on the end of the material. Here, the roof rail garnish is locked to the roof side rail side as an interior member for the region outside in the vehicle width direction from the end portion of the ceiling material, but from the roof side rail side by the deployment pressure of the airbag bag body. Detach and unfold into the passenger compartment. Moreover, since the terminal part of the ceiling material is configured to be deformable toward the vehicle interior side by the deployment pressure of the airbag bag body, it is deformed and deployed toward the vehicle interior side with the deployment of the roof rail garnish. At this time, since the roof rail garnish is connected to the peripheral portion by a flexible belt-like body, the roof rail garnish is held in the vicinity of the terminal portion of the ceiling material, and is deployed to the vehicle interior side together with the terminal portion.

  Thus, in the arrangement structure of the head protection airbag device according to the first aspect, a large opening can be secured for the airbag bag body to bulge toward the vehicle interior side. For this reason, even when the width dimension of the roof rail garnish is relatively small, the airbag bag body for protecting the head can be smoothly deployed into the vehicle interior.

  According to a second aspect of the present invention, in the arrangement structure of the head protecting airbag device according to the first aspect, the peripheral portion is a back surface of the ceiling material.

  In the arrangement structure of the head protection airbag device according to claim 2, since the peripheral part to which the belt-like body is connected is the back surface of the ceiling material, when the ceiling material and the roof rail garnish are assembled to the vehicle, the roof rail The assembling work can be performed in a state where the garnish and the ceiling material are connected in advance by a belt-like body.

  According to a third aspect of the present invention, in the arrangement structure of the head protection airbag device according to the first or second aspect, the belt-like body is an assist grip with respect to a mounting bracket provided on the roof side rail. It is characterized by being fastened and fixed together.

  In the arrangement structure of the head protection airbag device according to claim 3, the belt-like body is fastened and fixed together with the assist grip to the mounting bracket provided on the roof side rail. The fixed state is stronger. For this reason, it is possible to further enhance the holding effect of the roof rail garnish by the belt-like body when the airbag bag body is deployed.

  According to a fourth aspect of the present invention, in the arrangement structure of the head protecting airbag device according to the first aspect, the peripheral portion is a mounting bracket provided on the roof side rail to fix the assist grip. It is characterized by.

  In the arrangement structure of the head protection airbag device according to claim 4, since the peripheral portion to which the belt-like body is connected is a mounting bracket provided on the roof side rail to fix the assist grip, the roof rail garnish After the frame is connected to the mounting bracket by a belt-like body, the ceiling material is assembled. For this reason, a ceiling material and a roof rail garnish can be assembled | attached separately, and workability | operativity is favorable.

  According to a fifth aspect of the present invention, in the arrangement structure of the head protecting airbag device according to the first or fourth aspect, the belt-like body is locked to a mounting bracket provided on the roof side rail. The mounting bracket is fastened and fixed together with the assist grip.

  In the arrangement structure of the head protection airbag device according to claim 5, the belt-like body is locked to the mounting bracket provided on the roof side rail and fastened and fixed together with the assist grip to the mounting bracket. Therefore, the fixed state of the belt-shaped body with respect to the mounting bracket is stronger. For this reason, it is possible to further enhance the holding effect of the roof rail garnish by the belt-like body when the airbag bag body is deployed.

  According to a sixth aspect of the present invention, in the arrangement structure of the head protecting airbag device according to any one of the first to fifth aspects, the roof rail garnish is arranged in a vehicle width direction when the ceiling member is assembled to a vehicle. It has the temporary holding means for temporarily holding | maintaining so that rotation is possible.

  In the arrangement structure of the head protecting airbag device according to claim 6, the roof rail garnish is provided for temporarily holding the roof rail garnish in a vehicle width direction when the ceiling member is assembled to the vehicle. The roof rail garnish has a degree of freedom to rotate in the vehicle width direction when temporarily held by the temporary holding means. For this reason, when the ceiling material is assembled to the vehicle, the roof rail garnish can be prevented from being caught on the vehicle side, and the ceiling material can be prevented from being caught on the roof rail garnish. For this reason, the workability | operativity at the time of the assembly | attachment of a ceiling material can be improved.

  According to a seventh aspect of the present invention, in the arrangement structure of the head protecting airbag device according to the sixth aspect, the terminal portion of the ceiling member is provided with a through hole, and the temporary holding means is It is provided at the end edge of the roof rail garnish, and is characterized in that it is a convex portion that can be engaged with the through hole when the end edge is inserted into the through hole.

  In the arrangement structure of the head protection airbag device according to claim 7, the temporary holding means is a convex portion provided at an edge of the roof rail garnish, and is provided in a through hole provided in a terminal portion of the ceiling material. The roof rail garnish can be temporarily held by inserting the end edge and engaging the protrusion with the through hole. For this reason, when a ceiling material is assembled | attached to a vehicle, it can suppress that a roof rail garnish is caught on the vehicle side.

  According to an eighth aspect of the present invention, in the arrangement structure of the head protection airbag device according to the sixth aspect, the temporary holding means protrudes from the outer edge of the roof rail garnish in the vehicle width direction toward the roof side rail. A convex portion having a head with a circular cross section in the vehicle width direction at the tip, and the convex portion can be locked to the roof side rail side during temporary holding of the roof rail garnish and during normal operation. The bag bag body is configured to be detachable from the roof side rail side by the deployment pressure when the bag bag body is deployed.

  In the arrangement structure of the head protection airbag device according to claim 8, the temporary holding means is provided to project from the outer edge of the roof rail garnish in the vehicle width direction to the roof side rail side, and at the tip in the vehicle width direction. The roof rail garnish can be brought into a temporary holding state and a normal use state by engaging the convex portion with the roof side rail side. For this reason, when the ceiling material is assembled to the vehicle, the ceiling material can be prevented from being caught by the roof rail garnish. Further, when the airbag bag body is deployed, the convex portion is separated from the roof side rail side by the deployment pressure, so that the roof rail garnish can be deployed to the vehicle interior side.

  As described above, according to the arrangement structure of the head protection airbag device according to claim 1 of the present invention, even when the width dimension of the roof rail garnish is relatively small, the head protection airbag is provided. It is possible to obtain an excellent effect that the bag body can be smoothly deployed into the vehicle interior.

  According to the arrangement structure of the head protection airbag device according to claim 2, when the ceiling material and the roof rail garnish are assembled to the vehicle, the roof rail garnish and the ceiling material are preliminarily connected by the belt-like body. An excellent effect that the attaching work can be performed is obtained.

  According to the arrangement structure of the head protecting airbag device according to claim 3, an excellent effect is obtained that the holding effect of the roof rail garnish by the belt-like body when the airbag bag body is deployed can be further enhanced. .

  According to the arrangement structure of the head protecting airbag device according to the fourth aspect, the ceiling material and the roof rail garnish can be assembled separately, and an excellent effect of improving workability can be obtained.

  According to the arrangement structure of the head protecting airbag device according to claim 5, an excellent effect is obtained that the effect of holding the roof rail garnish by the belt-like body when the airbag bag body is deployed can be further enhanced. .

  According to the arrangement structure of the head protection airbag device according to the sixth aspect, it is possible to obtain an excellent effect that workability at the time of assembling the ceiling material can be improved.

  According to the arrangement structure of the head protection airbag device according to claim 7, when the ceiling material is assembled to the vehicle, an excellent effect is obtained that the roof rail garnish can be suppressed from being caught on the vehicle side. It is done.

  According to the arrangement structure of the head protecting airbag device according to claim 8, when the ceiling material is assembled to the vehicle, the excellent effect that the ceiling material can be prevented from being caught by the roof rail garnish. can get.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
In FIG. 1, the head protection airbag device arrangement structure S <b> 1 according to the present embodiment includes a head protection airbag bag body 10, a ceiling material 12, and a roof rail garnish 14 (FIG. 2). Have.

  The airbag bag body 10 is arranged in a folded state along the roof side rail 16 and is configured to be deployable in a curtain shape into the vehicle compartment 18 when supplied with an inflation gas. Specifically, as shown in FIG. 1, the airbag bag body 10 is arranged in a folded state along the roof side rail 16 across, for example, the A pillar 20, the B pillar 22, the C pillar 24, and the D pillar 26. It is installed. For example, an inflator 28 is provided at a position adjacent to the airbag bag body 10 above the C-pillar 24 to supply an inflation gas to the airbag bag body 10 when the vehicle side impacts or rolls over. Has been. The inflator 28 is connected to, for example, a fin-like connection portion 30 that communicates with the airbag bag body 10.

  Here, in FIG. 2, the roof side rail 16 is configured by joining an inner panel 32 and an outer panel 34, and is a vehicle skeleton member that extends in the vehicle front-rear direction on both sides in the vehicle width direction at the top of the vehicle body. . Specifically, the roof side rail 16 is configured by joining the inner panel 32 and the outer panel 34 at least at the joint portion 36 on the inner side in the vehicle width direction. A reinforcement 38 is sandwiched between the inner panel 32 and the outer panel 34 and joined together at a joint 36. In the non-pillar portion, the inner panel 32, the outer panel 34, and the reinforcement 38 are joined at the joint portion 40 on the outer side in the vehicle width direction, whereby the roof side rail 16 is configured in a closed cross section.

  Although illustration is omitted, in the pillar portion, the lower part of the outer panel 34 in the roof side rail 16 is connected to the pillar outer panel, and the lower part of the inner panel 32 in the roof side rail 16 is connected to the pillar inner panel.

  As shown in FIG. 1, attachment pieces 42 are formed at arbitrary intervals on the upper edge of the airbag bag body 10. These attachment pieces 42 are fastened and fixed to the inner panel 32 (FIG. 2) of the roof side rail 16 with bolts and nuts (not shown), whereby the airbag bag body 10 is fixed to the body side. In addition, the airbag body 10 includes a front inflatable portion 10F that inflates on the side of an occupant's head (not shown) seated on the first row seat 51 and an occupant's head seated on the second row seat 52. A central inflatable portion 10M that inflates laterally (not shown) and a rear inflatable portion 10R that inflates laterally of the head (not shown) of the occupant seated on the third row seat 53. is doing.

  The inflator 28 is configured to operate in response to an operating current from an airbag ECU (not shown) and supply an inflation gas to the airbag bag body 10. The airbag ECU is configured to flow an operating current to the inflator 28 when a side collision or rollover of the vehicle is determined based on signals from a side collision sensor and a rollover sensor (not shown). The position where the inflator 28 is connected to the airbag bag body 10 is not limited to the illustrated example, and may be, for example, the front end portion or the rear end portion of the airbag bag body 10.

  In FIG. 2, the ceiling material 12 is a so-called roof head lining disposed as an interior member in a region from the ceiling portion 44 of the passenger compartment 18 to the roof side rail 16, and the terminal portion 12 </ b> A in the vehicle width direction is an airbag. The bag body 10 is configured to be deformable to the vehicle interior side by the deployment pressure of the bag body 10. The ceiling material 12 is configured, for example, by covering a side surface of a passenger compartment of a synthetic resin base material with a skin (not shown). Further, the ceiling member 12 has a general surface 12B along the ceiling portion 44 of the passenger compartment 18, and an inclined surface 12C extending obliquely downward toward the outer side in the vehicle width direction, for example, at both ends of the general surface 12B in the vehicle width direction. ing. As shown in FIG. 3, the inclined surface 12C is provided with a through hole 12G into which the insertion portion 46A is inserted when the assist grip 46 is assembled.

  The terminal portion 12A of the ceiling material 12 extends, for example, substantially horizontally to the outside in the vehicle width direction of the inclined surface 12C, and is, for example, between the joint portion 40 of the roof side rail 16 at the vehicle lower position of the airbag bag body 10, for example. The terminal is terminated with a predetermined gap 50 therebetween. A step portion 12D corresponding to the plate thickness of the roof rail garnish 14 is formed in a part of the terminal portion 12A. In a normal state, that is, in the fully assembled state of the roof rail garnish 14, the surface from the ceiling material 12 to the roof rail garnish 14 is substantially flushed by the roof rail garnish 14 being superimposed on the stepped portion 12D. A through hole 12E for temporarily holding the roof rail garnish 14 when the ceiling member 12 is assembled to a vehicle is provided in, for example, a step portion 12D in the terminal portion 12A of the ceiling member 12.

  In FIG. 2, the roof rail garnish 14 is connected to the rear surface 12F of the ceiling member 12 as an example of the peripheral portion by a flexible band 48 and is located on the outer side in the vehicle width direction from the terminal portion 12A of the ceiling member 12. It is arranged as an interior member for the region, is locked to the roof side rail 16 side, and can be detached from the roof side rail 16 side by the deployment pressure of the airbag body 10. The roof rail garnish 14 is configured, for example, by covering a side surface of a passenger compartment of a synthetic resin base material with a skin (not shown). Further, the roof rail garnish 14 extends in the vehicle front-rear direction along the terminal portion 12A of the ceiling material 12, and is an area outside the vehicle width direction from the terminal portion 12A of the ceiling material 12, that is, between the terminal portion 12A and the roof side rail 16. It arrange | positions so that the predetermined clearance gap 50 (FIG. 3) between the junction parts 40 may be filled up.

  A convex portion 14 </ b> B is provided on the inner edge 14 </ b> A in the vehicle width direction of the roof rail garnish 14. This convex portion 14B is an example of a temporary holding means for temporarily holding the roof rail garnish 14 so as to be rotatable in the vehicle width direction when the ceiling material 12 is assembled to a vehicle. In consideration of appearance during normal use, For example, it is provided on the back surface 14F of the roof rail garnish 14. As shown in FIG. 3, the convex portion 14B engages with the through hole 12E when the end edge 14A of the roof rail garnish 14 is inserted into the through hole 12E in the end portion 12A of the ceiling member 12, and is shown in FIG. As shown, when the assembly of the roof rail garnish 14 is completed, it is configured to enter the through hole 12E. In order to allow the roof rail garnish 14 to turn in the vehicle width direction when the roof rail garnish 14 is temporarily held, the size of the through-hole 12E in the terminal portion 12A of the ceiling material 12 is set to the end of the roof rail garnish 14. It is desirable to make it larger than the thickness of the edge 14A. On the other hand, a claw portion 14 </ b> C is provided at the outer end in the vehicle width direction on the back surface 14 </ b> F of the roof rail garnish 14.

  Here, a first bracket 61, which is an example of a mounting bracket, is disposed outside the airbag bag body 10 in the vehicle width direction, and the first bracket 61 corresponds to the position where the belt-shaped body 48 is disposed. The base 61A is fixed to, for example, the inner panel 32 of the roof side rail 16 by welding, for example. The first bracket 61 extends downward from the base 61A and terminates at a mounting portion 61B that extends outward in the vehicle width direction along the back surface of the roof rail garnish 14.

  As shown in FIG. 3, the attachment portion 61 </ b> B is provided with a through hole 61 </ b> C into which the claw portion 14 </ b> C of the roof rail garnish 14 is engaged when the roof rail garnish 14 is fully assembled. The claw portion 14C is configured to be detached from the through hole 61C when the deployment pressure of the airbag bag body 10 acts on the roof rail garnish 14. In consideration of replacement of the roof rail garnish 14, inspection of the airbag bag body 10 and the like, the claw portion 14C can be detached from the through hole 61C not only when the airbag bag body 10 is deployed but also at normal times. You may comprise as follows. The shape of the claw portion 14C is not limited to that shown in the drawing.

  In FIG. 2, the roof rail garnish 14 is connected to the back surface 12 </ b> F of the ceiling member 12 by a flexible band 48. As shown in FIG. 4, one end 48 </ b> A is fixed to the back surface 12 </ b> F using, for example, an adhesive 54, and the other end 48 </ b> B is fixed to the back surface 14 </ b> F of the roof rail garnish 14 using, for example, an adhesive 56. Has been. The belt-like body 48 has a tensile strength that does not break when the roof rail garnish 14 and the terminal portion 12 </ b> A of the ceiling material 12 are deployed by the deployment pressure of the airbag bag body 10. Similarly, the adhesives 54 and 56 have such adhesive strength that they do not peel off when the roof rail garnish 14 and the end portion 12A of the ceiling material 12 are deployed.

  Of the belt-like body 48, the length of the central portion 48C that is not fixed by the adhesives 54 and 56 is such that the roof rail garnish 14 is in the fully assembled state (see FIG. 2) and temporarily held (see FIG. 3). It is set in consideration of changing posture. That is, the posture of the roof rail garnish 14 is along the terminal portion 12A of the ceiling member 12 in the assembled state, and the end edge 14A on the inner side in the vehicle width direction is inserted into the through hole 12E in the terminal portion 12A of the ceiling member 12 in the temporarily held state. The terminal unit 12A is suspended. Considering the stroke when inserting and removing the end edge 14A of the roof rail garnish 14 into the through-hole 12E and the protruding amount of the end edge 14A and the end portion 12A of the ceiling member 12 in the temporary holding state, the central portion 48C of the band 48 The length needs to be secured in excess of the length required at the time of this assembly.

  As shown in FIG. 2, the band 48 is fastened and fixed together with the assist grip 46 to a second bracket 62 that is an example of a mounting bracket provided on the roof side rail 16. Specifically, one end 48 </ b> A of the belt-like body 48 extends to the inner side in the vehicle width direction from the through hole 12 </ b> G into which the insertion portion 46 </ b> A of the assist grip 46 is inserted, and the ceiling member 12 is inclined when the assist grip 46 is assembled. It is sandwiched between the surface 12C and the second bracket 62. As shown in FIG. 1, the belt-like bodies 48 are disposed at a plurality of locations in the vehicle front-rear direction, but it is not necessary to fasten and fix all the belt-like bodies 48 together with the assist grips 46. In the illustrated example, the belt-like bodies 48 are fastened and fixed together at the vehicle front side portions of the three assist grips 46.

  Here, the second bracket 62 is disposed corresponding to the assembly position of the assist grip 46. Specifically, the second bracket 62 is joined to, for example, the inner panel 32 of the roof side rail 16 at the base portion 62A, extends from the base portion 62A toward the inclined surface 12C of the ceiling member 12, and extends along the inclined surface 12C. It terminates at the extending attachment portion 62B. The attachment portion 62B is provided with a through hole 62C into which the insertion portion 46A of the assist grip 46 is fitted and engaged (see FIG. 3). The insertion portion 46A of the assist grip 46 is formed in, for example, a claw shape. However, the means for fastening and fixing the assist grip 46 to the second bracket 62 is not limited to this, and a fastening means such as a screw is used. It may be used.

  In FIG. 2, in the case of a sashless type window structure, a weather strip 58 is attached along the joint 40 of the roof side rail 16, and when the side window 60 is closed, the weather strip 58 is placed on the side window 60. Water tightness and airtightness are secured by the close contact of the edges. Note that the window structure is not limited to the sashless type, and the side window 60 is not limited to be openable and closable.

  In the present embodiment, the adhesives 54 and 56 are used as means for fixing the strip 48 to the ceiling material 12 and the roof rail garnish 14, but the fixing means for the strip 48 is not limited to this. A means such as welding may be used.

  Moreover, although the convex part 14B was mentioned as an example of a temporary holding means, a temporary holding means is not restricted to this. For example, the through hole 12E in the end portion 12A of the ceiling member 12 is configured to be slightly smaller than the end edge 14A of the roof rail garnish 14, and the roof rail is caused by the frictional force when the end edge 14A is fitted into the through hole 12E. The garnish 14 may be temporarily held on the ceiling material 12.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. First, the assembly of the ceiling material 12 and the roof rail garnish 14 will be described with reference to FIG. In the arrangement structure S1 of the head protecting airbag device, one end 48A of the belt-like body 48 is fixed to the back surface 12F of the ceiling material 12, and the other end 48B is fixed to the back surface 14F of the roof rail garnish 14. On the other hand, the roof rail garnish 14 is connected in advance, and assembly work can be performed in this connected state.

  Specifically, in the present embodiment, the roof rail garnish 14 is provided on the end edge 14A of the roof rail garnish 14 as temporary holding means for temporarily holding the roof rail garnish 14 so as to be rotatable in the vehicle width direction when the ceiling member 12 is assembled to the vehicle. Since the through-hole 12E for temporarily holding the roof rail garnish 14 is provided in the step portion 12D of the terminal portion 12A of the ceiling member 12, the edge of the roof rail garnish 14 is provided. The roof rail garnish 14 can be temporarily held by inserting 14A into the through hole 12E of the ceiling member 12 and engaging the convex portion 14B with the through hole 12E.

  At this time, as shown in the drawing, the roof rail garnish 14 is suspended from the terminal portion 12A of the ceiling member 12, and the terminal portion 12A and the vehicle body side portion are separated from each other. In addition to this, the roof rail garnish 14 is temporarily held by the terminal portion 12A of the ceiling material 12 and has a degree of freedom to rotate in the vehicle width direction. When assembled to 44, the roof rail garnish 14 can be restrained from being caught on the vehicle side. For this reason, the workability at the time of the assembly | attachment of the ceiling material 12 can be improved with the simple structure which can temporarily hold | maintain the roof rail garnish 14 to the terminal part 12A of the ceiling material 12 by the convex part 14B.

  Subsequently, as shown in FIG. 2, a claw-like insertion portion 46 </ b> A of the assist grip 46 is inserted from a through hole 12 </ b> G (FIG. 3) provided in the inclined surface 12 </ b> C of the ceiling material 12, and one end 48 </ b> A of the belt-shaped body 48 is inserted. When it is penetrated and engaged with the through hole 62 </ b> C (FIG. 3) of the second bracket 62, the one end 48 </ b> A is fastened together with the assist grip 46. Thereby, the assembly of the ceiling material 12 is completed.

  When the assembly of the ceiling material 12 is completed, the end edge 14A of the roof rail garnish 14 is pulled out from the through hole 12E in the terminal portion 12A of the ceiling material 12. Then, as shown in FIG. 2, the convex portion 14B of the roof rail garnish 14 is inserted into the through hole 12E for positioning, and the claw portion 14C of the roof rail garnish 14 is covered while the gap 50 is covered by the roof rail garnish 14. Is engaged with the through-hole 61C of the first bracket 61, the roof rail garnish 14 is in a fully assembled state. At this time, the convex portions 14B and the claw portions 14C of the roof rail garnish 14 are not visible from the passenger compartment 18 side, so that the appearance during normal use is good.

  Next, the operation when the airbag bag body 10 is deployed will be described. In FIG. 1, in the arrangement structure S1 of the head protection airbag device, when the airbag ECU determines the occurrence of a side collision or rollover of the vehicle based on signals from the side collision sensor and the rollover sensor, An ignition current is supplied from the bag ECU to the inflator 28. The inflator 28 is activated by the ignition current to generate a large amount of gas. By supplying this gas to the airbag bag body 10, the airbag bag body 10 is inflated and deployed so as to have a curtain shape, and thereby the heads of the occupants seated on the first row seats 51 (see FIG. The front inflatable portion 10F is inflated on the side of the seat (not shown) and the central inflatable portion 10M is inflated on the side of the head (not shown) of the occupant seated on the second row seat 52. The rear inflatable portion 10R is inflated at the side of the head (not shown) of the occupant seated on 53.

  Here, the action when the airbag bag body 10 is deployed will be described in more detail. As shown in FIG. 4, when the airbag bag body 10 in a folded state receives inflating gas supply from the inflator 28 and starts to inflate and deploy, the deployment pressure is applied to the end portions of the roof rail garnish 14 and the ceiling member 12. Acts on 12A. Here, the roof rail garnish 14 is locked to the roof side rail 16 side, specifically, the first bracket 61 as an interior member for the region on the outer side in the vehicle width direction from the terminal portion 12A of the ceiling material 12, The claw portion 14 </ b> C of the roof rail garnish 14 is separated from the through hole 61 </ b> C of the first bracket 61 by the deployment pressure of the airbag bag body 10, and is deployed toward the vehicle interior side.

  Further, the terminal portion 12A of the ceiling member 12 is in a state of being deformed and deployed toward the vehicle interior side by the deployment pressure as the airbag bag body 10 is deployed. At this time, the roof rail garnish 14 is connected to the back surface 12F of the ceiling member 12 by a flexible band 48 and is held in the vicinity of the terminal portion 12A of the ceiling member 12. Expand inward.

  Thus, in the arrangement structure S1 of the head protecting airbag device, it is possible to secure a large opening 66 for the airbag bag body 10 to bulge toward the vehicle interior side. For this reason, even when the width dimension of the roof rail garnish 14 is relatively small, the airbag bag body 10 for protecting the head can be smoothly deployed into the vehicle compartment 18.

  In addition, since the one end 48A of the band 48 is fastened and fixed together with the assist grip 46 to the second bracket 62, the fixed state of the band 48 with respect to the second bracket 62 is stronger. For this reason, it is possible to further enhance the holding effect of the roof rail garnish 14 by the belt-like body 48 when the airbag bag body 10 is deployed.

[Second Embodiment]
In FIG. 5, in the head protection airbag device arrangement structure S <b> 2 according to the present embodiment, a peripheral portion to which the belt-like body 48 is connected is provided on the roof side rail 16 in order to fix the assist grip 46. A mounting bracket, that is, a second bracket 62 is provided. Specifically, one end 48A of the belt-like body 48 is overlapped on the inner surface in the vehicle width direction of the mounting portion 62B of the second bracket 62 and hooked on a locking portion 62D provided on the vehicle upper side of the mounting portion 62B. Is locked. The locking portion 62D is formed by cutting and raising a part of the second bracket 62, for example. One end 48 </ b> A of the band 48 is fastened and fixed together with the assist grip 46 as the assist grip 46 is assembled.

  The roof rail garnish 64 is configured, for example, by covering a side surface of a passenger compartment of a synthetic resin base material with a skin (not shown). The roof rail garnish 64 extends in the vehicle front-rear direction along the terminal portion 12A of the ceiling material 12, and is a region outside the vehicle width direction from the terminal portion 12A of the ceiling material 12, that is, between the terminal portion 12A and the roof side rail 16. It arrange | positions so that the predetermined clearance gap 50 (FIG. 6) between the junction parts 40 may be filled up.

  The other end 48B of the strip 48 is fixed to the back surface 64F of the roof rail garnish 64 by using, for example, an adhesive 56, whereby the roof rail garnish 64 and the second bracket 62 are connected. As described above, the roof rail garnish 64 is disposed as an interior member for the region on the outer side in the vehicle width direction from the terminal portion 12A of the ceiling member 12 in a state where the roof rail garnish 64 is connected to the second bracket 62 by the strip 48. For example, it is locked to the first bracket 61 on the 16 side and can be detached from the first bracket 61 side by the deployment pressure of the airbag bag body 10.

  Of the belt-like body 48, the length of the central portion 48C that is not fastened and fixed together with the assist grip 46 and is not fixed by the adhesive 56 is the same as that of the assembled state (see FIG. 5) of the roof rail garnish 64. It is set taking into consideration that the posture changes depending on the state (see FIG. 6). That is, the posture of the roof rail garnish 64 follows the end portion 12A of the ceiling member 12 in the assembled state, and rotates in the vehicle width direction around the convex portion 64E locked to the first bracket 61 by, for example, its own weight in the temporary holding state. For example, the vehicle is inclined downward toward the vehicle toward the edge 64A on the inner side in the vehicle width direction. As described above, the roof rail garnish 64 is rotated and retracted outward in the vehicle width direction, so that the ceiling material 12 and the roof rail garnish 64 are prevented from being caught when the ceiling material 12 is assembled. For this reason, the length of the central portion 48C of the belt-like body 48 is ensured to be more than the length required at the time of the assembling so that the roof rail garnish 64 can be sufficiently retracted to the outside in the vehicle width direction. It is necessary to keep.

  In the present embodiment, the temporary holding means for temporarily holding the roof rail garnish 64 when the ceiling member 12 is assembled to the ceiling portion 44 of the vehicle is provided on the roof side rail from the edge 64D on the outer side in the vehicle width direction of the roof rail garnish 64. A convex portion 64E is provided so as to protrude toward the 16th side and has a head 64H having a circular cross section in the vehicle width direction at the tip. The convex portion 64E can be locked to the first bracket 61 at the time of temporarily holding the roof rail garnish 64 and at a normal time, and can be detached from the first bracket 61 by the deployment pressure when the airbag body 10 is deployed. Has been.

  Specifically, the head 64H having a circular cross section in the convex portion 64E is configured to be slightly larger than the through hole 61C of the first bracket 61, and when the convex portion 64E is fitted into the through hole 61C, The head 64H is configured to pass through the through hole 61C while being elastically deformed, for example. When the head portion 64H passes through the through hole 61C, the convex portion 64E is locked to the first bracket 61, whereby the roof rail garnish 64 is temporarily held (see FIG. 6) or in a normal state (see FIG. 5). Can be done.

  In the convex portion 64E, the head portion 64H is provided at the tip of the neck portion 64N that is narrower in the vehicle width direction than the head portion 64H. From the viewpoint of securing the degree of freedom of rotation of the roof rail garnish 64 in the vehicle width direction in the temporary holding state, the length of the neck portion 64N is set larger than the plate thickness of the mounting portion 61B of the first bracket 61. In the example shown in FIG. 5, the length of the neck portion 64 </ b> N is set to be larger than the sum of the plate thickness of the attachment portion 61 </ b> B, the thickness of the other end 48 </ b> B of the strip 48, and the thickness of the adhesive 56.

  Thus, in this embodiment, the head 64H of the convex portion 64E is circular in cross section in the vehicle width direction, and the length of the neck portion 64N is set to be large, whereby the roof rail garnish 64 is attached to the first bracket 61. Thus, it is possible to ensure a degree of freedom in which the roof rail garnish 64 rotates in the vehicle width direction.

  The head portion 64H of the convex portion 64E is circular in cross section in the vehicle width direction, and thus may be spherical in appearance, or may be a columnar shape or an elliptical column shape extending in the vehicle front-rear direction. The head 64H does not necessarily have a circular cross-section as a whole. When the roof rail garnish 64 in the temporary holding state of the head 64H rotates in the vehicle width direction, the first bracket 61 penetrates. The area | region which contacts the edge part of the hole 61C should just be a cross-sectional arc shape. In this regard, a spherical seat may be provided at the edge of the through hole 61C of the first bracket 61. This is because the rotation of the roof rail garnish 64 becomes smoother by receiving the head portion 64H of the convex portion 64E with the spherical seat.

  As shown in FIG. 5, a claw portion 64 </ b> C is provided on an edge 64 </ b> A on the inner side in the vehicle width direction on the back surface 64 </ b> F of the roof rail garnish 64. The claw portion 64C is configured to be engageable with a through hole 12E provided in the step portion 12D in the terminal portion 12A of the ceiling material 12. As shown in FIG. 6, the claw portion 64C is not engaged with the through hole 12E in the temporary holding state of the roof rail garnish 64, and is engaged with the through hole 12E as shown in FIG. By doing so, the roof rail garnish 64 is in a fully assembled state. In a normal state, that is, in the fully assembled state of the roof rail garnish 64, the surface from the ceiling material 12 to the roof rail garnish 64 is substantially flush with the roof rail garnish 64 being overlaid on the step portion 12D of the terminal portion 12A of the ceiling material 12. It has become.

  Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. First, the assembly of the ceiling material 12 and the roof rail garnish 64 will be described with reference to FIG. In the arrangement structure S2 of the head protection airbag device, the roof rail garnish 64 is temporarily held prior to the assembly of the ceiling material 12. Specifically, one end 48A of the band 48 fixed to the back surface 64F of the roof rail garnish 64 at the other end 48B is hooked and locked to the locking portion 62D of the second bracket 62, and the convexity of the roof rail garnish 64 is also fixed. The portion 64E is fitted into the through hole 61C of the first bracket 61, and the head portion 64H of the convex portion 64E is engaged with the through hole 61C. Thereby, the roof rail garnish 64 can be temporarily held.

  At this time, the roof rail garnish 64 is rotated outwardly in the vehicle width direction around the convex portion 64E until, for example, due to its own weight, the central portion 48C of the belt-like body 48 is not loosened, toward the inner edge 64A in the vehicle width direction. The vehicle is tilted downward. That is, the roof rail garnish 64 is retracted to the outside in the vehicle width direction. Thereby, when the ceiling material 12 is assembled to the ceiling portion 44 of the vehicle, the ceiling material 12 can be suppressed from being caught by the roof rail garnish 64.

  Subsequently, as shown in FIG. 5, a claw-like insertion portion 46 </ b> A of the assist grip 46 is inserted from the through hole 12 </ b> G (FIG. 6) provided in the inclined surface 12 </ b> C of the ceiling material 12, and one end 48 </ b> A of the belt-shaped body 48 is inserted. When it is penetrated and engaged with the through hole 62 </ b> C (FIG. 6) of the second bracket 62, the one end 48 </ b> A is fastened together with the assist grip 46. Thereby, the assembly of the ceiling material 12 is completed.

  When the assembling of the ceiling material 12 is completed, the edge 64A of the roof rail garnish 64 is lifted and rotated clockwise around the convex portion 64E to penetrate the claw portion 64C through the end portion 12A of the ceiling material 12. When engaged with the hole 12E, the roof rail garnish 64 is in a fully assembled state. At this time, the convex portions 64E and the claw portions 64C of the roof rail garnish 64 are not visible from the passenger compartment 18 side, so that the appearance during normal use is good. As described above, in the head protection airbag device arrangement structure S2, the roof rail garnish 64 is temporarily held by the first bracket 61 on the roof side rail 16 side, and then the ceiling member 12 is assembled to the ceiling portion 44 of the vehicle. Then, the roof rail garnish 64 can be engaged with the terminal portion 12A of the ceiling member 12 and finally assembled.

  Next, the operation when the airbag bag body 10 is deployed will be described. In FIG. 7, when the airbag bag body 10 in a folded state receives inflating gas from the inflator 28 (see FIG. 1) and starts to inflate and deploy, the deployment pressure is applied to the roof rail garnish 64 and the end of the ceiling member 12. It acts on the part 12A. Here, the roof rail garnish 64 is locked to the roof side rail 16 side, specifically, the first bracket 61, as an interior member for the region outside the end portion 12A of the ceiling member 12 in the vehicle width direction. The convex portion 64E of the roof rail garnish 64 is detached from the through hole 61C of the first bracket 61 by the deployment pressure of the airbag bag body 10 and is deployed to the vehicle interior side.

  Further, since the terminal portion 12A of the ceiling member 12 is configured to be deformable toward the vehicle interior side by the deployment pressure of the airbag bag body 10, the terminal portion 12A is deformed and deployed toward the vehicle interior side as the roof rail garnish 64 is deployed. Become. At this time, the roof rail garnish 64 is connected to the second bracket 62 by a flexible band 48 and is held near the terminal portion 12A of the ceiling member 12, and therefore, the roof rail garnish 64 is deployed to the vehicle interior side together with the terminal portion 12A. To do. In the example shown in the figure, the claw portion 64C of the roof rail garnish 64 is detached from the through hole 12E in the terminal portion 12A of the ceiling material 12. However, the present invention is not limited to this, and the claw portion 64C and the through hole 12E are engaged. It may be left as it is.

  Thus, in the arrangement structure S1 of the head protecting airbag device, it is possible to secure a large opening 66 for the airbag bag body 10 to bulge toward the vehicle interior side. For this reason, even when the width dimension of the roof rail garnish 64 is relatively small, the airbag bag body 10 for protecting the head can be smoothly deployed into the vehicle compartment 18.

  In addition, since the one end 48A of the band 48 is fastened and fixed together with the assist grip 46 to the second bracket 62, the fixed state of the band 48 with respect to the second bracket 62 is stronger. For this reason, it is possible to further enhance the holding effect of the roof rail garnish 64 by the belt-like body 48 when the airbag bag body 10 is deployed.

  4 and 7, the airbag bag body 10 is drawn so as to be rolled inward in the vehicle width direction, but the method of folding the airbag bag body 10 is limited to this. Instead, the roll may be folded outward in the vehicle width direction. Rather, in order to deploy the airbag bag body 10 along the side of the vehicle body, it is preferable to roll-fold toward the outside in the vehicle width direction. Moreover, the folding method by bellows folding may be sufficient, and the folding method which combined roll folding and bellows folding may be sufficient.

  Further, as the peripheral portion to which the one end 48A of the belt-like body 48 is fixed, the back surface 12F of the ceiling material 12 is cited in the first embodiment, and the second bracket 62 is cited in the second embodiment, but the peripheral portion is limited to these. Any other suitable part may be used as the fixing part of the one end 48A.

FIGS. 1 to 4 relate to the first embodiment, and FIG. 1 is a side view of a vehicle to which the arrangement structure of the head protection airbag device is applied as viewed from the vehicle interior side. FIG. 2 is an enlarged cross-sectional view taken along arrow 2-2 in FIG. 1, showing an arrangement structure of the head protection airbag device. It is an expanded sectional view which shows the state by which the roof rail garnish was temporarily hold | maintained at the terminal part of the ceiling material. In FIG. 2, it is an expanded sectional view which shows the state which the airbag bag body expand | deployed. FIGS. 5 to 7 relate to the second embodiment, and FIG. 5 is an enlarged cross-sectional view showing an arrangement structure of the head protection airbag device. It is an expanded sectional view showing the state where a beltlike body was connected with the 2nd bracket, and the roof rail garnish was temporarily held by the 1st bracket. In FIG. 5, it is an expanded sectional view which shows the state which the airbag bag body expand | deployed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Air bag body 12 Ceiling material 12A Terminal part 12F Back surface (peripheral region)
14 roof rail garnish 14A vehicle width direction inner edge 14B convex part (temporary holding means)
16 Roof side rail 18 Car compartment 44 Ceiling part 46 Assist grip 48 Strip body 62 Second bracket (peripheral part, mounting bracket)
64 Roof rail garnish 64A End edge on the inner side in the vehicle width direction 64D End edge on the outer side in the vehicle width direction 64E Convex part (temporary holding means)
S1 Head Protection Airbag Device Arrangement Structure S2 Head Protection Airbag Device Arrangement Structure

Claims (8)

An airbag bag body for protecting the head, which is arranged in a folded state along the roof side rail and is configured to be deployed in a curtain shape into the vehicle interior when receiving the supply of inflation gas;
A ceiling material arranged as an interior member in a region from the ceiling portion of the vehicle compartment to the roof side rail, and configured such that a terminal portion in the vehicle width direction can be deformed toward the vehicle interior side by the deployment pressure of the airbag bag body. When,
It is disposed as an interior member for a region on the outer side in the vehicle width direction from the terminal portion of the ceiling member in a state of being connected to a peripheral portion by a flexible belt-like body, and is locked to the roof side rail side and A roof rail garnish configured to be removable from the roof side rail side by the deployment pressure of the airbag body,
An arrangement structure of a head protecting airbag device, comprising:   The arrangement structure of the head protection airbag device according to claim 1, wherein the peripheral portion is a back surface of the ceiling member.   3. The head protection airbag device according to claim 1, wherein the belt-like body is fastened and fixed together with an assist grip to a mounting bracket provided on the roof side rail. Construction structure.   The arrangement structure of the head protection airbag device according to claim 1, wherein the peripheral portion is a mounting bracket provided on the roof side rail to fix the assist grip.   The said strip | belt-shaped body is fastened and fixed with the said assist grip with respect to this attachment bracket while being latched by the attachment bracket provided in the said roof side rail. An arrangement structure of the head protection airbag device according to the description.   The temporary holding means for temporarily holding the roof rail garnish so as to be rotatable in the vehicle width direction when the ceiling material is assembled to a vehicle. 6. Arrangement structure of the head protection airbag device. A through hole is provided in the terminal portion of the ceiling material,
The temporary holding means is a convex portion that is provided at an inner edge in the vehicle width direction of the roof rail garnish, and is engageable with the through hole when the end edge is inserted into the through hole. The arrangement structure of the head protection airbag apparatus according to claim 6. The temporary holding means is a convex portion provided to protrude from the edge of the roof rail garnish on the outer side in the vehicle width direction toward the roof side rail, and having a circular head at the tip in the vehicle width direction.
The convex portion can be locked to the roof side rail side during temporary holding of the roof rail garnish and during normal operation, and can be detached from the roof side rail side by the deployment pressure when the airbag bag body is deployed. The arrangement structure of the head protection airbag device according to claim 6.

Images