JP2008239082A - Curtain airbag device for vehicle, and garnish member used therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten the deployment completion time of an airbag while ensuring the mounting stability of a garnish member. <P>SOLUTION: The garnish member 10 for a curtain airbag device, attached and fixed from the inside of a cabin to a rail 5 on the side of a roof on the periphery of the opening of a door, is provided with: a cover part 21 covering the airbag 11 from the inside of the cabin; an upper fixing part 23 arranged in the vicinity of the upper end of the cover part 21 and fixed to a vehicle body 6; a lower fixing part 25 arranged in the vicinity of the lower end of the cover part 21 and fixed to the vehicle body 6; and a tear line 27 formed in the vicinity of a boundary between the cover part 21 and the lower fixing part 25. When the airbag 11 is inflated upon collision of a vehicle, the airbag is ruptured along the tear line 27, thereby opens the cover part 21 like a door with the side of the upper fixing part 23 as a turning center, and the airbag 11 to be inflated is deployed toward the inside of the cabin. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle curtain airbag device for protecting a passenger's head in the event of a vehicle collision.

  The curtain airbag device for a vehicle is attached to a rule side rail, and protects the occupant's head by deploying the airbag downward when a side collision occurs.

  A curtain airbag device disclosed in Patent Document 1 is configured to include an airbag and an inflator, and is attached from the vehicle interior side to the folded airbag and the inflator, and hides the airbag and the inflator. A garnish (garnish member) and a pillar garnish (garnish member).

  In this curtain airbag device, the upper end of the pillar garnish is attached to the vehicle body with a fastener or a retaining metal fitting, while the lower end of the pillar garnish is placed on the flange portion of the door weather strip attached to the vehicle body. It is supported in the state.

When the airbag is inflated at the time of a collision, the lower end of the pillar garnish falls off the flange portion of the door weather strip due to the inflation force of the airbag, and the pillar garnish opens in a door shape with the upper end side of the pillar garnish as a pivotal fulcrum. The airbag is deployed toward the passenger compartment.
JP-A-11-32477

  However, in such a prior art, since the lower end of the pillar garnish is simply placed on the flange of the door weather strip, there is a concern about the mounting stability of the lower end of the pillar garnish. Here, in order to support the pillar garnish stably with the door weather strip, if the overlap margin between the pillar garnish and the door weather strip is increased, the pillar garnish will come out of the door weather strip when the airbag is deployed. The required force (deployment resistance) for the airbag increases, and the airbag deployment completion time may become longer.

  The present invention has been made by paying attention to such a conventional technique, and has an object of shortening the airbag deployment completion time while ensuring the attachment stability of the lower end of the garnish member of the curtain airbag device. .

  The invention according to claim 1 is for a vehicle including an airbag, an inflator that inflates the airbag by injecting gas at the time of a collision, and a garnish member that covers the airbag and the inflator from the vehicle interior side. In the curtain airbag device, the garnish member includes a cover portion that covers the airbag from the vehicle interior side, an upper fixing portion that is provided near an upper end of the cover portion and is fixed to a vehicle body, and a lower end of the cover portion A lower fixing portion provided in the vicinity and fixed to the vehicle body, and a tear line formed in the vicinity of the boundary between the cover portion and the lower fixing portion, and when the airbag is inflated at the time of a vehicle collision, When the garnish member is broken along the tear line, the cover portion of the garnish member is door-shaped with the upper fixed portion side as a rotation center. Characterized in that the open.

  Invention of Claim 2 is a curtain airbag apparatus for vehicles of Claim 1, Comprising: As for the said garnish member, an upper fixing | fixed part is via the attachment piece of the U-shaped cross section opened below, It is fixed to the vehicle body.

  A third aspect of the present invention is the curtain airbag device for a vehicle according to the first or second aspect, wherein the lower fixing portion is fixed to the vehicle body via a fixing bracket.

  The invention according to claim 4 is a garnish member for a curtain airbag device, wherein the garnish member is provided in the vicinity of an upper end of the cover portion and a cover portion that covers the airbag from the vehicle interior side, and is fixed to the vehicle body. An upper fixed portion, a lower fixed portion provided near the lower end of the cover portion and fixed to the vehicle body, and a tear line formed near the boundary between the cover portion and the lower fixed portion. When the airbag is inflated at the time of a vehicle collision, it breaks along a tear line formed in the vicinity of the lower fixing part, thereby separating the lower fixing part and opening the door around the upper fixing part side. It is characterized by opening to.

  According to the first aspect of the present invention, since the upper end side and the lower end side of the garnish member are respectively fixed to the vehicle body, the mounting stability of the garnish member can be ensured. When the airbag is deployed, the tear line formed near the boundary between the cover portion of the garnish member and the lower fixing portion is broken, so that the cover portion of the garnish member opens in a door shape with the upper fixing portion side as the center of rotation. Even if the lower end side of the garnish member is firmly fixed, the airbag deployment completion time can be shortened by opening the cover portion of the garnish member in a door shape with a relatively small force.

  According to the second aspect of the present invention, since the upper fixed portion of the garnish member is fixed to the vehicle body via the U-shaped cross-section mounting piece, the deployment stroke of the cover portion of the garnish member is increased, and the airbag The gap that allows the vehicle to expand toward the vehicle interior side becomes larger. As a result, the airbag is smoothly deployed in the passenger compartment, and the airbag deployment completion time can be further shortened.

  According to the third aspect of the present invention, since the lower fixing portion of the garnish member is fixed to the vehicle body via the fixing bracket, the mounting stability of the lower fixing portion of the garnish member is further improved.

  According to the invention described in claim 4, the same effect as in claim 1 can be obtained.

  Embodiments of the present invention will be described below with reference to the drawings.

  1-8 is a figure which shows one Embodiment of this invention. First, an outline of the curtain airbag device will be described with reference to FIGS.

  1 and 2 show a schematic structure of a curtain airbag device. FIG. 1 shows a state before the airbag is deployed, and FIG. 2 shows a state after the airbag is deployed.

  As shown in FIGS. 1 and 2, the curtain airbag device 10 is attached to the roof side rail 5. 1 and 2, reference numeral 2 denotes a front pillar, reference numeral 3 denotes a center pillar, and reference numeral 4 denotes a rear pillar. A roof side rail 5 is formed above the pillars 2, 3, and 4.

  The curtain airbag device 10 includes an airbag 11, an inflator 13 that inflates the airbag 11 by injecting gas at the time of a collision, and a garnish member that covers the airbag 11 and the inflator 13 from the vehicle interior side (not shown in FIGS. 1 and 2). ).

  The airbag 11 is formed by a bag that is long in the vehicle front-rear direction, and in a folded state, a rectangular tab 12 formed at the upper end thereof is made of metal brackets 30 and 40 (not shown in FIGS. 1 and 2). It is being fixed to the roof side rail 5 via.

  A gas inlet 15 is formed at the rear end of the airbag 11, and an inflator 13 is connected thereto. A strap 17 is connected to the front end of the airbag 11, and the front end of the strap 17 is fixed to a fixing point 19 of the front pillar 2.

  The airbag 11, the inflator 13, and the strap 17 are covered with garnish members (roof side garnish, rear pillar garnish, front pillar garnish) (not shown) from the vehicle interior side.

  When the automobile is caused by a side collision, the inflator 13 is activated, gas is injected from the inflator 13 into the airbag 11, and the airbag 11 is inflated. Then, the unillustrated garnish member is broken by the inflating force of the airbag 11, and the airbag 11 is deployed therefrom as shown in FIG. At this time, the strap 17 prevents the front end of the airbag 11 from moving backward.

  Next, the structure of the curtain airbag device 10 of the present embodiment will be described in detail with reference to FIGS.

  As shown in FIG. 3, the curtain airbag device 10 of the present embodiment includes an airbag 11, a garnish member 20, a first bracket 30, a second bracket 40, a cover member 50, and a fixing bracket. After the clip 60 is modularized, it is attached to the vehicle body (in this example, the inner panel 6 of the roof side rail 5).

  The first bracket 30 is formed of a metal member, and is fastened to the vehicle body 6 with a screw S1 as fastening means. The first bracket 30 is attached along the extending direction of the roof side rail 5. The first bracket 30 is integrally provided with a base 31 fixed to the vehicle body 6 and a plate-like main body 35 that is spaced apart from the base 31 via a curved portion 33 and extends in parallel with the base 31. The base 31 of the first bracket 30 is fastened to the vehicle body 6 by a screw S1 as fastening means. Further, the second bracket 40 is fastened to the plate-like main body 35 of the first bracket 30 with a screw S2 as a fastening means.

  The second bracket 40 is made of a metal member, and extends in the shape of a long plate in the vehicle longitudinal direction. The second bracket 40 protrudes from the upper end of the plate-like main body 41 and opens downward. And a mounting piece 43 formed in a U-shape. The airbag 11 and the cover member 50 are also fastened to the plate-like main body portion 41 of the second bracket 40 by a screw S2 for fastening and fixing the second bracket 40 to the first bracket 30 together. On the other hand, the upper fixing part 23 of the garnish member 20 is fastened to the mounting piece 43 of the second bracket 40 by screws S3 as fastening means.

  The airbag 11 folded in a columnar shape is covered with an outer periphery by a cylindrical wrap member and is kept in a folded state, and includes a plurality of tabs 12 in the longitudinal direction. When the airbag 11 is inflated, the wrap member is broken and the airbag 11 is deployed.

  The cover member 50 includes a long plate-like main body portion 51 that is formed in an L-shaped cross section and extends in the vehicle front-rear direction, and a rectangular tab 53 that protrudes upward from the upper wall portion 51 b of the main body portion 51. Configured. A slot 55 is formed through the upper wall portion 51 b of the main body 51 at a position adjacent to the base of the tab 53.

  As shown in FIG. 6, the cover member 50 and the airbag 11 formed as described above are configured such that the tab 12 of the airbag 11 is inserted into the slot 55 of the cover member 50 and the tab 12 and the cover member 50 of the airbag 11 are inserted. In a state where the tab 53 is overlapped, the plate-like main body portion 41 of the second bracket 40 and the plate-like main body portion 35 of the first bracket 30 are fastened together with screws S3 as shown in FIG.

  As shown in FIGS. 3 to 5, the garnish member 20 protrudes from a cover portion 21 that covers the airbag 11 from the vehicle interior side, an upper fixing portion 23 that protrudes from the upper end of the cover portion 21, and a lower end of the cover portion 21. And a lower fixing portion 25 provided. The upper fixing part 23 of the garnish member 20 is fixed to the vehicle body 6 via brackets 30 and 40, while the lower fixing part 25 of the garnish member 20 is fixed to the vehicle body 6 via a clip 60 as a fixing metal fitting. (See FIG. 3). The garnish member 20 includes a tear line 27 formed as a V-shaped groove near the boundary between the cover portion 21 and the lower fixing portion 25.

  The cover portion 21 of the garnish member 20 is formed in a substantially U-shaped cross section, and has an upper wall portion 21a extending in the horizontal direction in the vehicle width direction, and an inner side in the vehicle width direction (vehicle interior side) of the upper wall portion 21a. And a lower wall portion 21d extending in the horizontal direction in the vehicle width direction through an arc portion 21c curved in an arc shape from the vertical wall portion 21b. Has been. The cover portion 21 is located on the vehicle interior side of the airbag 11 folded in a columnar shape and covers the airbag 11.

  A vertical wall portion 21e protrudes upward from a terminal on the vehicle width direction outer side (vehicle compartment outer side) of the upper wall portion 21a of the cover portion 21, and a rectangular tab-shaped upper fixing portion 23 projects from the tip. Yes. By fixing the upper fixing portion 23 to the vehicle body 6 via the brackets 30 and 40, the upper end side of the garnish member 20 is fixed to the vehicle body 6.

  On the other hand, the lower fixing portion 25 of the garnish member 20 is configured as a protruding piece protruding from the lower end of the cover portion 21 as shown in FIGS. 4 and 5, and includes a first wall portion 25 a and a first wall. And a second wall portion 25b projecting in an orthogonal direction from a substantially middle portion of the portion 25a and having a T-shaped cross section. As shown in FIG. 3, the lower fixing portion 25 of the garnish member 20 is fixed to the vehicle body 6 via a clip 60 serving as a fixing bracket. As shown in FIGS. 3 and 7, the clip 60 is inserted into a through hole 6 a formed in the vehicle body 6 in a state of being covered with the second wall portion 25 b of the lower fixing portion 25 of the garnish member 20. The second wall portion 25b of the lower fixing portion 25 is prevented from escaping from the through hole 6a of the vehicle body 6.

  The structure of the clip 60 will be described more specifically. As shown in FIGS. 7 and 8, the clip 60 includes a main body portion 61 having a U-shaped cross section and a first projecting toward the inside of the main body portion 61. The locking piece 63 is configured to include a second locking piece 65 having a square cross section and projecting toward the outside of the main body 61. In a state where the main body portion 61 having a U-shaped cross section is put on the second wall portion 25 b of the lower fixing portion 25 of the garnish member 20, the first locking piece 63 has the clip 60 connected to the second fixing portion 25. The inner wall of the through-hole 26 formed in the second wall portion 25b is hooked and locked so as to prevent the wall portion 25b from falling off, and the second locking piece 65 is The insertion into the through hole 6a formed in the vehicle body 6 is allowed and the movement from the inserted state to the opposite side in the insertion direction is prevented.

  Next, the attachment process of the curtain airbag device 10 of this embodiment will be described.

  First, as shown in FIG. 4, the airbag 11, the garnish member 20, the first bracket 30, the second bracket 40, the cover member 50, and the clip 60 are combined into a module.

  Next, the curtain airbag device 10 thus modularized is attached to the vehicle body 6 as shown in FIG. When attaching to the vehicle body 6, the first bracket 30 is screwed to the vehicle body 6 and the lower fixing portion 25 of the garnish member 20 is fixed through the clip 60, so that the upper end side and the lower end of the curtain airbag device 10 are fixed. The side is fixed to the vehicle body 6, and the installation of the curtain airbag device 10 is completed.

  When fixing the lower end side of the curtain airbag device 10, first, the lower fixing portion 25 of the garnish member 20 is bent approximately 90 degrees with respect to the cover portion 21 along the tear line 27, and in this state, The second wall portion 25 b of the lower fixing portion 25 covered with the clip 60 is inserted into the through hole 6 a of the vehicle body 6. When the clip 60 is inserted into the through hole 6a of the vehicle body 6 and the second locking piece 65 of the clip 60 finally passes through the through hole 6a of the vehicle body 6, the second locking piece 65 is The clip 60 is engaged with the periphery of the through hole 6 a of the vehicle body 6 and is prevented from moving to the opposite side in the insertion direction, and the lower end side of the curtain airbag device 10 is fixed to the vehicle body 6.

  Next, the operation of the curtain airbag device 10 of the present embodiment will be described.

  When a side collision occurs, the inflator 13 of the curtain airbag device 10 is activated and the airbag 11 is inflated. When the airbag 11 is inflated, the garnish member 20 is broken along the tear line 27 by the inflating force, and the cover portion 21 of the garnish member 20 is a door with the U-shaped attachment piece 43 on the upper fixed portion 23 side as a rotation center. (See the virtual line in FIG. 3). Thereby, the airbag 11 which expand | swells expand | deploys from the clearance gap of the fracture | rupture part of the garnish member 20 to the vehicle interior side (refer FIG. 2).

  At this time, the force necessary to rotate the cover portion 21 into a door shape is a force necessary to break the tear line 27, so that the lower fixing portion 25 on the lower end side of the cover portion 21 is securely and securely attached. Even if the cover is fixed, the cover portion 21 is opened like a door with a relatively small force compared to the conventional structure (for example, Patent Document 1), so that the airbag deployment completion time is shortened.

  Moreover, since the rotation center of the cover part 21 of the garnish member 20 is the U-shaped attachment piece 43, the door opening stroke of the cover part 21 of the garnish member 20 is increased (that is, the gap generated at the fractured part is increased). Therefore, the airbag 11 is smoothly deployed in the vehicle interior, and the deployment completion time of the airbag 11 is further shortened.

  Next, the effects of this embodiment will be listed.

  (1) In the present embodiment, the garnish member 10 for the curtain airbag device attached and fixed to the roof side rail 5 around the door opening periphery from the vehicle interior side includes a cover portion 21 that covers the airbag 11 from the vehicle interior side; An upper fixing portion 23 provided near the upper end of the cover portion 21 and fixed to the vehicle body 6, a lower fixing portion 25 provided near the lower end of the cover portion 21 and fixed to the vehicle body 6, and the cover portion 21 and the lower fixing portion 25. And a tear line 27 formed in the vicinity of the boundary, and when the airbag 11 is inflated at the time of a vehicle collision, the cover part 21 is turned along the upper fixed part 23 side by breaking along the tear line 27 It opens in the shape of a door as the center and allows the inflated airbag to be deployed toward the vehicle interior side.

  Therefore, since the upper end side and the lower end side of the garnish member 20 are each fixed to the vehicle body 6, the attachment stability of the garnish member 20 is ensured. Further, when the airbag is deployed, the tear line 27 formed in the vicinity of the boundary between the cover portion 21 and the lower fixing portion 25 of the garnish member 20 is broken, so that the cover portion 21 of the garnish member 20 is connected to the upper fixing portion 23 side. It will open like a door as the pivot center. Therefore, the force necessary to rotate the cover portion 21 into a door shape becomes the force necessary to break the tear line 27, and the lower fixing portion 25 on the lower end side of the cover portion 21 is firmly and securely fixed. However, the cover portion 21 can be opened like a door with a relatively small force compared to the conventional structure (for example, Patent Document 1), and the airbag deployment completion time can be shortened.

  That is, according to the present embodiment, the deployment completion time of the airbag 11 can be shortened while securing the attachment stability of the garnish member 20.

  (2) Moreover, in this embodiment, the upper part fixing part 23 is being fixed to the vehicle body 6 via the attachment piece 42 of the U-shaped cross section opened downward. Therefore, the door opening stroke of the cover part 21 of the garnish member 20 can be increased, and the gap generated at the fractured portion is increased. Therefore, the airbag 11 is smoothly deployed in the vehicle interior, and the deployment completion time of the airbag 11 can be further shortened.

  (3) In the present embodiment, the lower fixing portion 25 is fixed to the vehicle body 6 via the fixing bracket 60. Therefore, the attachment stability of the lower fixing portion 25 of the garnish member 20 is further improved.

  (4) In the embodiment, the fixing bracket 60 is inserted into the through-hole 6a formed in the vehicle body 6 while being covered with the lower fixing portion 25 of the garnish member 20, so that the lower fixing portion 25 is connected to the vehicle body 6. It is comprised as a clip 60 which prevents escape from the through-hole 6a. Therefore, the work of attaching the lower fixing portion 25 to the vehicle body 6 is simplified.

  The present invention should not be construed as limited to the above-described embodiments, and various other modifications can be made within the scope of the technical idea of the present invention.

It is the schematic which shows the example of arrangement | positioning of the curtain airbag apparatus of one Embodiment of this invention, Comprising: The figure which shows the state before airbag deployment. The figure which shows the state after the airbag deployment of the curtain airbag apparatus of FIG. Sectional drawing of the curtain airbag apparatus. The figure which shows the modularized state before the vehicle body attachment of the curtain airbag apparatus. The disassembled perspective view of a part of the curtain airbag device. The disassembled perspective view for demonstrating the combined state of the airbag and cover member of the curtain airbag apparatus. The expanded sectional view of the attachment state of the clip of the curtain airbag device. The expansion perspective view of the clip of the curtain airbag device.

Explanation of symbols

6 ... Roof side rail inner panel (vehicle body)
DESCRIPTION OF SYMBOLS 10 ... Curtain airbag apparatus 11 ... Air bag 13 ... Inflator 20 ... Garnish member 21 ... Cover part 23 ... Upper fixing part 25 ... Lower fixing part 27 ... Tier line 30 ... 1st bracket 40 ... 2nd bracket 41 ... Plate Main body 43 ... U-shaped mounting piece 60 ... Clip (fixing bracket)

Claims (4)

A curtain airbag device for a vehicle that is attached and fixed to the door opening periphery from the vehicle interior side,
An airbag, an inflator that inflates the airbag by injecting gas at the time of a collision, and a garnish member that covers the folded airbag from the vehicle interior side,
The garnish member includes a cover portion that covers the airbag from the vehicle interior side, an upper fixing portion that is provided near the upper end of the cover portion and is fixed to the vehicle body, and is provided near the lower end of the cover portion and is fixed to the vehicle body. A lower fixing portion, and a tear line formed near the boundary between the cover portion and the lower fixing portion, and when the airbag is inflated at the time of a vehicle collision, it breaks along the tear line. A curtain airbag device for a vehicle, wherein the cover portion opens in a door shape with the upper fixed portion side as a rotation center. The vehicle curtain airbag device according to claim 1,
A curtain airbag device for a vehicle, wherein the garnish member has an upper fixing portion fixed to a vehicle body via a mounting piece having a U-shaped cross section opened downward. The vehicle curtain airbag device according to claim 1 or 2,
The lower curtain fixing part is fixed to the vehicle body via a fixing bracket. A garnish member for a curtain airbag device that is attached and fixed to the door opening periphery from the vehicle interior side,
A cover portion for covering the folded airbag from the vehicle interior side, an upper fixing portion provided near the upper end of the cover portion and fixed to the vehicle body, and a lower fixing provided near the lower end of the cover portion and fixed to the vehicle body And a tear line formed in the vicinity of the boundary between the cover part and the lower fixing part, and the cover part by breaking along the tear line when an airbag is inflated at the time of a vehicle collision A garnish member for a curtain airbag device for a vehicle, wherein the garnish member opens in a door shape with the upper fixed portion side as a rotation center.

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