JP2016078626A - Installation structure of curtain airbag device to vehicle, and airbag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To install an airbag enlarging a chamber on a front side in the inside of a front pillar, without a restriction on a layout and the breakage of a front pillar garnish.SOLUTION: An installation structure of a curtain airbag device 11 to a front pillar 3 is provided. An airbag 12 is provided with a duct 12b for introducing gas generated by an inflator 13 into a plurality of chambers 12a, over generally the whole length in a fore-and-aft direction of a vehicle. A front pillar garnish 1 is provided with a pedestal 16 which has a reaction force surface 16a projecting out to the front pillar, around a pin 15 inserted in an installation hole 3a to fix the front pillar garnish 1 to the front pillar 3. The airbag 12 is disposed so as to push the reaction force surface 16a by the duct 12b bulging in a direction extracting the pin 15 from the installation hole 3a at a deployment early stage, when the airbag 12 is deployed.SELECTED DRAWING: Figure 1

Description

  The present invention provides, for example, a structure in which a curtain airbag device that protects the head of an occupant by an airbag deployed in a curtain shape is installed in the automobile when the automobile is collided from the side, and an airbag suitable for the installation structure. It is about.

  Hereinafter, in the present application, “upper” and “upper” mean the ceiling side of the automobile, and “lower” and “lower” mean the floor side of the automobile. Further, “front” and “front” mean the forward direction side of the automobile, and “rear” and “rear” mean the backward direction side of the automobile.

  For example, when a high load such as a collision is applied to the side of an automobile, the curtain airbag device generates gas by operating an inflator. It is something to be developed.

  The curtain airbag device is installed along the roof side rail from a front pillar of an automobile, for example, and is covered with a front pillar garnish or a room head lining and stored outside the vehicle compartment.

  For example, when a car is collided from the side, the airbag is deployed by the gas generated by the inflator, and the front pillar garnish and the room head lining are pushed toward the vehicle interior to engage the front pillar and the roof side rail. Comes off.

  After the disengagement, the airbag is deployed in a curtain shape in the vehicle interior from the opening formed by the front pillar garnish and the room head lining disengaged from the front end side of the vehicle interior.

  By the way, for example, when a car is collided from the side, in order to prevent the occupant from jumping out of the vehicle by the deployed airbag, the chamber located on the vehicle front side of the airbag may be enlarged.

  When the curtain airbag device having such an airbag is installed in an automobile, the enlarged chamber is located inside the front pillar. In this case, when the airbag is deployed, the amount of front pillar garnish that is spread by the chamber located inside the front pillar increases, and the front pillar garnish may be damaged.

  Therefore, Patent Document 1 discloses a structure in which a surrounding member that surrounds an airbag together with the front pillar and the front pillar garnish and guides the development of the airbag is installed between the front pillar and the front pillar garnish.

  In the structure of this Patent Document 1, since the front pillar garnish and the surrounding member are simultaneously spread when the airbag is deployed, it is possible to suppress the amount of front pillar garnish being spread and to prevent the front pillar garnish from being damaged. .

  However, the surrounding member has a high rigidity and is configured to rotate around the bent portion on the attachment portion side when the airbag is deployed. Therefore, it is necessary to give the strength sufficient to prevent deformation due to the deploying force of the airbag, and an excessive enclosure member is required, resulting in layout restrictions.

  Further, in order to prevent the front pillar garnish from being damaged, Patent Document 2 discloses a technique in which the front pillar garnish 1 is fixed to the front pillar 3 with a clip 2 as shown in FIG.

  In the structure of this Patent Document 2, the corrugated part 4 and the movement restricting part 5 are provided on the front pillar garnish side of the clip 2. When the airbag 6 is deployed, the front pillar garnish 1 generated when the airbag 6 is deployed by moving the mounting opening 7a of the clip mount 7 provided on the front pillar garnish 1 while interfering with the wavy portion 4. Relieves the impact of lifting. In addition, 8 in FIG. 6 shows a windshield, 9 shows a front side window glass.

  However, in the structure of Patent Document 2, it is necessary to provide strength so that the clip does not come off from the mounting opening of the clip mounting base when a normal use force acts on the front pillar garnish.

  In this case, the clip is difficult to come off even when the airbag is deployed, so the deployed airbag will force the front pillar garnish tip side into the vehicle interior, and external force is applied to the front pillar garnish tip. There is a risk of damage.

JP 2010-137753 A JP 2013-52788 A

  The problem to be solved by the present invention is that the technique of Patent Document 1 for preventing the damage of the front pillar garnish when deploying an airbag having a larger front side of the vehicle requires an excessive enclosure member, This is a limitation.

  In addition, the technology of Patent Document 2 prevents the front pillar garnish from being damaged when the front pillar garnish is strong enough to prevent the clip from detaching from the mounting opening of the clip mounting base when normal operating force is applied to the front pillar garnish. Is that you can't.

  The present invention makes it possible to install an airbag device having a larger front chamber of a vehicle inside the front pillar without causing restrictions on the layout and without damaging the front end portion of the front pillar garnish. It is intended.

  As a premise of the present invention, as shown in FIG. 7, a case is considered in which the clip 2 is held by a U-shaped receiving member 10 so that the front pillar garnish 1 can move downward with respect to the clip 2. However, in the structure in which the clip 2 is held by the U-shaped receiving member 10, it is assumed that the front pillar garnish 1 is detached from the front pillar 3 during normal use.

  In view of this, the inventors have considered removing the front pillar garnish from the front pillar before the airbag emerges from the opening formed by pushing the front side of the front pillar garnish toward the vehicle interior side.

  In order to remove the front pillar garnish from the front pillar at the early timing of the airbag deployment start, it is effective to push, for example, the vicinity of the clip of the front pillar garnish in the direction opposite to the insertion direction of the clip.

  However, as a result of testing by the inventors, even when the airbag installed in the conventional manner is deployed, a downward load acts on the clip portion, and the vicinity of the clip is defined as the insertion direction of the clip. It turned out that it could not be pushed in the opposite direction.

  Therefore, the inventors believe that in order to push the vicinity of the clip of the front pillar garnish in the direction opposite to the insertion direction of the clip, a surface for pushing the front pillar garnish is necessary in the vicinity. Finally, the following present invention has been established.

That is, the present invention
A curtain airbag device including an airbag that is disposed outside a vehicle interior of a vehicle front pillar garnish and a roof head lining, and in an emergency, deploys the vehicle interior in a curtain shape along a side window by gas generated by an inflator. The installation structure to the front pillar,
The airbag is provided with a duct for introducing the gas generated by the inflator into a plurality of chambers over substantially the entire length in the front-rear direction of the vehicle,
The front pillar garnish has a pin that is inserted into a mounting hole provided in the front pillar on the outer side of the passenger compartment facing the front pillar to fix the front pillar garnish to the front pillar, and a reaction surface that protrudes in the front pillar direction. Provide a pedestal around the pin,
The most important feature is that when the airbag is deployed, the airbag is arranged such that the duct that inflates in the initial stage of the deployment pushes the reaction surface in the direction of pulling out the pin from the mounting hole.

  The present invention provides a pedestal having a reaction surface projecting in the direction of the front pillar around a pin for mounting to the front pillar provided in the front pillar garnish, and ducts in the direction of pulling out the pin at the initial stage of airbag deployment. The airbag is arranged so as to press the reaction force surface.

  Therefore, at the initial stage of deployment of the airbag, the duct inflates and pushes the reaction surface of the pedestal to separate the front pillar garnish from the front pillar, and the front pillar garnish pin is pulled out from the mounting hole provided in the front pillar. After the front pillar garnish is removed from the front pillar, air is introduced into the chamber and the airbag is deployed in a curtain shape in the passenger compartment. The reaction force surface of the pedestal may be provided in at least one of the vehicle longitudinal directions.

  In the case of the installation structure of the present invention, it is desirable to adopt an airbag having an expansion part in a duct. In this case, the enlarged expansion part of the airbag is installed so as to be positioned at a portion where the reaction force surface of the pedestal is pressed at the initial stage of deployment.

  In the present invention, the airbag is deployed after the front pillar garnish is removed from the front pillar. Therefore, even if an airbag with a larger chamber on the front side of the vehicle is installed on the front pillar, the front pillar garnish tip is not damaged when the airbag is deployed.

  In addition, since a base having a reaction force surface is provided around the mounting pin, and the airbag is only arranged so that the duct pushes the reaction force surface in the direction of pulling out the pin at the initial stage of deployment of the airbag, There are no restrictions on layout.

BRIEF DESCRIPTION OF THE DRAWINGS It is the figure which showed 1st Example of the installation structure of the curtain airbag apparatus provided with the airbag of this invention, (a) is the figure which showed the unfolded state and front pillar garnish of the airbag of this invention, (b) FIG. 5 is a perspective view showing an attachment portion of the front pillar garnish to the front pillar when the airbag is installed. It is the figure which showed the attachment part to the front pillar of the front pillar garnish at the time of the installation state of the airbag in 1st Example of this invention, (a) is a perspective view, (b) is AA cross section of (a). FIG. FIG. 3 is a view similar to FIG. 2 when the airbag is initially deployed in the first embodiment of the present invention. It is the same figure as FIG. 2 which showed the state which the front pillar garnish removed from the front pillar by deployment of the airbag in 1st Example of this invention. It is a figure similar to FIG. 2 in 2nd Example of this invention. Sectional drawing which showed the attachment part to the front pillar of the front pillar garnish in the installation structure of patent document 2, (a) is the time of the installation state of an airbag, (b) is the figure which showed the time of deployment of an airbag It is. It is sectional drawing which showed the attachment part to the front pillar of the front pillar garnish which shows an example of the structure considered in the process leading to this invention.

  An object of the present invention is to make it possible to install an airbag having a large chamber on the front side of a vehicle inside a front pillar without any restrictions on layout and without damaging the front pillar garnish. .

  For this purpose, a pedestal having a reaction force surface projecting in the direction of the front pillar is provided around the pin provided on the front pillar garnish, and the duct moves in the direction in which the pin is pulled out at the initial stage of deployment of the airbag. This was achieved by placing the airbag to push the surface.

  Hereinafter, a first embodiment of the installation structure of a curtain airbag device using the airbag of the present invention will be described with reference to FIGS.

  A curtain airbag device 11 includes an airbag 12 and an inflator 13. Among these, as shown in FIG. 1, the airbag 12 includes a plurality of chambers 12a for protecting the occupant's head during deployment, and a duct 12b for introducing the gas generated by the inflator 13 into the plurality of chambers 12a. have. In FIG. 1, an airbag 12 is shown in which a strap 12 c that is locked to the front pillar 3 is provided at the front portion.

  And the airbag 12 of this invention has provided the duct 12b over substantially the full length of the vehicle front-back direction. In addition, when the vehicle front side portion of the airbag 12 is installed on the front pillar 3, an enlarged inflating portion 12 d is provided in the duct 12 b portion arranged in the vicinity of the attachment position of the front pillar garnish 1 to the front pillar 3. Yes.

  The present invention is a structure for installing, for example, a front side portion of a curtain airbag device 11 disposed outside a passenger compartment of a front pillar garnish 1 and a roof head lining 14 of an automobile on a front pillar 3 as follows. Is adopted.

  That is, the present invention has a structure in which the front pillar garnish 1 is attached to the front pillar 3 by inserting the pins 15 provided on the front pillar garnish 1 into the attachment holes 3 a provided in the front pillar 3.

  At that time, a pedestal 16 is provided around the pin 15 to be inserted into the mounting hole 3a in the vicinity of the enlarged expansion portion 12d of the duct 12b, and a reaction force surface 16a protruding in the front pillar direction is formed on the pedestal 16. . Although the reaction force surface 16a is provided in both the front and rear directions of the vehicle in FIG. 1, it may be provided only in the front direction of the vehicle or only in the rear direction of the vehicle.

  The installation structure of the curtain airbag device 11 of the present invention has the above-described configuration. Hereinafter, the change in the relative position of the front pillar garnish 1 with respect to the front pillar 3 when the airbag 12 is deployed will be described with reference to FIGS. Will be explained.

  FIG. 2 shows a state in which the airbag 12 is installed on the front pillar 3. For example, the expanded inflated portion 12 d of the duct 12 b in the airbag 12 in the wound state is a reaction force of the pedestal 16 provided around the pin 15. It is installed so as to face the surface 16a.

  In the installation state shown in FIG. 2, for example, when an impact is applied from the side of the automobile, the expanded portion 12 d of the duct 11 b of the airbag 12 that inflates in the initial direction pulls the pin 15 from the mounting hole 3 a of the front pillar 3. Then, the reaction force surface 16a of the base 16 is pushed (see FIG. 3). As a result, the front pillar garnish 1 is detached from the front pillar 3.

  After the front pillar garnish 1 is detached from the front pillar 3, the chamber 12a is inflated and the airbag is deployed vertically downward from the opening of the front pillar garnish 1 and the front pillar 3 (see FIG. 4).

  In the present invention, since the airbag 12 is deployed after the front pillar garnish 1 is detached from the front pillar 3, the front pillar garnish 1 is damaged even when the airbag 12 is enlarged in the front chamber 12 a. There is nothing.

  Further, since only the base 16 having the reaction surface 16a is provided around the pin 15 to be inserted into the mounting hole 3a in the vicinity of the enlarged expansion portion 12d of the duct 12b, there is no layout restriction.

  The present invention is not limited to the above examples, and it goes without saying that the embodiments may be appropriately changed as long as they are included in the scope of the technical idea described in each claim.

  That is, the embodiments described with reference to FIGS. 1 to 4 are preferable examples of the present invention, and other embodiments can be implemented or performed by various methods. In particular, the present invention is not limited to the detailed shape, size, configuration, and the like of the components shown in the accompanying drawings unless otherwise specified in the present specification. In addition, expressions and terms used in the present specification are for the purpose of explanation, and are not limited thereto unless specifically limited.

  For example, in the first embodiment shown in FIGS. 1 to 4, the reaction force surface 16 a formed on the pedestal 16 is formed in a direction perpendicular to the protruding direction of the pin 15. However, as shown in FIG. 5, the space 17 between the front pillar garnish 1 and the front pillar 3 may be inclined from the upper side to the lower side so as to expand.

  In this case, as shown in FIG. 5, if the duct 12b portion of the airbag 12 is arranged so as to be sandwiched between the reaction force surface 16a and the front pillar 3, the enlarged expansion portion 12d is formed in the duct 12b as in the first embodiment. May not be formed.

  However, when the duct 12b portion of the airbag 12 is sandwiched between the reaction force surface 16a and the front pillar 3, the reaction force surface 16a of the base 16 and the reaction force surface 16a are continuous to prevent the airbag 12 from being damaged. It is desirable to connect the lower surface 16b on the lower side with the convex curved surface 16c.

  The curtain airbag device of the present invention can be installed not only in an automobile but also in a side window portion of an aircraft, a ship, etc., and the same effect is exhibited.

DESCRIPTION OF SYMBOLS 1 Front pillar garnish 3 Front pillar 11 Curtain airbag apparatus 12 Air bag 12a Chamber 12b Duct 12d Expansion part 13 Inflator 14 Roof head lining 15 Pin 16 Base 16a Reaction force surface 16b Lower surface 16c Convex curved surface 17 Space

Claims (6)

A curtain airbag device including an airbag that is disposed outside a vehicle interior of a vehicle front pillar garnish and a roof head lining, and in an emergency, deploys the vehicle interior in a curtain shape along a side window by gas generated by an inflator. The installation structure to the front pillar,
The airbag is provided with a duct for introducing the gas generated by the inflator into a plurality of chambers over substantially the entire length in the front-rear direction of the vehicle,
The front pillar garnish has a pin that is inserted into a mounting hole provided in the front pillar on the outer side of the passenger compartment facing the front pillar to fix the front pillar garnish to the front pillar, and a reaction surface that protrudes in the front pillar direction. Provide a pedestal around the pin,
The curtain airbag device according to claim 1, wherein the airbag is arranged so that the duct that inflates in the initial stage of the deployment pushes the reaction surface in a direction in which the pin is pulled out from the mounting hole when the airbag is deployed. Installation structure.   The installation structure of the curtain airbag device according to claim 1, wherein the reaction force surface of the pedestal is provided at least in any one of the vehicle longitudinal directions.   The curtain according to claim 1 or 2, wherein the reaction surface of the pedestal is inclined so that a space between the front pillar garnish and the front pillar is widened from the vehicle upper side toward the vehicle lower side. Installation structure of the airbag device.   The installation structure of the curtain airbag device according to claim 3, wherein a reaction force surface of the pedestal and a lower surface on the vehicle lower side continuous with the reaction force surface are connected by a convex curved surface. An airbag used for the installation structure according to any one of claims 1 to 4,
In order to introduce a plurality of chambers and a gas generated by an inflator into the plurality of chambers, a duct provided over substantially the entire length in the front-rear direction of the vehicle,
An airbag having an enlarged inflating portion in the duct.   6. An installation structure for a curtain airbag device, wherein the expansion part of the airbag according to claim 5 is installed so as to be positioned at a portion that pushes the reaction force surface in the initial stage of deployment.

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