JP6433397B2 - Curtain airbag device - Google Patents

Description

  The present invention relates to a curtain airbag device that protects the head of an occupant and prevents it from being released outside the vehicle by, for example, an airbag deployed in a curtain shape along a side window when the automobile is collided from the side. Is. In particular, the present invention relates to a curtain airbag device for an automobile provided with three or more rows of seats in the front-rear direction.

  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.

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

  The curtain airbag device is attached to a roof side rail from a front pillar of an automobile, 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, in the case of an automobile having three rows of seats in the front-rear direction, as shown in FIG. 5A, the airbag 1 of the curtain airbag device is also a first row seat, a second row seat, An inflatable chamber is provided at a position corresponding to the third row of sheets.

  The chamber at the position corresponding to the first row sheet is the chamber 2 at the first row, the chamber at the position corresponding to the second row sheet is the chamber at the position corresponding to the second row chamber 3, and the third row sheet. The chamber is called chamber 4 in the third row.

  In the automobile provided with the three rows of seats, the seat of the third row, which is the last row, may be flipped up along the side of the interior of the automobile. In the folded-up storage state, the height of the upper edge of the third row of seats at the seating position is increased. Therefore, when the airbag is deployed, the third row chamber portion of the airbag is in the stored state in the third row. It can happen that it is caught on the upper edge of the sheet.

  In this case, the internal pressure of the airbag rises, and as shown in FIG. 5 (b), the airbag 1 is deployed on the vehicle interior side and the heads of the passengers seated on the first and second rows of seats There is a possibility that protection or release to the outside of the vehicle cannot be prevented. In FIG. 5B, reference numeral 5 denotes a third-row seat, 5a denotes an upper edge of the third-row seat 5 in the stored state, and 6 denotes a side surface portion on the inner side of the vehicle.

  In order to solve this problem, the shape of the seats in the third row and the height of the seating position in the raised state are changed, or the first row, the second row, and the third row are dealt with. To deal with as a separate curtain airbag.

  However, when the shape of the seats in the third row and the height of the seating position in the folded-up storage state are changed, the structure of the seats becomes complicated. In addition, when the curtain air bag device in the first row and the second row and the third row are separated, the number of components of the curtain airbag device is increased. There is a high possibility that the unfolding behavior in the normal state where the eye sheet is not stored is deteriorated.

  On the other hand, a curtain airbag device for a three-row seat has been disclosed that suppresses the movement of the airbag from the intended position in the front-rear direction of the automobile when deployed (for example, paragraphs 0034 and 0035 of Patent Document 1). (See FIG. 9).

  However, because it is difficult to find a range that does not affect the head protection of the passengers seated in the first row and second row seats and the ability to prevent release to the outside of the vehicle, the shape of the chamber and the deployment direction of the airbag There is nothing to deal with by managing.

Japanese Patent Laid-Open No. 2003-231453

  The problem to be solved by the present invention is that when the airbag at the time of deployment is caught on the upper edge of the seat in the last row of the storage state that is flipped up along the side of the interior of the automobile, the desired deployment performance can be obtained. However, there is no conventional method for dealing with it with a simple structure.

  The present invention has a simple structure with a small number of components, and protects the head of an occupant seated on a seat other than the last row and releases it to the outside of the vehicle even when the seat is caught on the upper edge of the seat in the last row in the folded state. The purpose is to prevent the prevention performance from being affected.

In order to achieve the above object, the curtain airbag device of the present invention provides:
An inflator,
An insertion portion of the inflator, a chamber developed by gas injected from the inflator, and an airbag having a duct connecting the chamber and the insertion portion;
With
The airbag has a plurality of chambers corresponding to a seating position of each row of an automobile having three or more rows in a vehicle front-rear direction, and a seating position of a seat in the last row and a seat in front of the last row. A non-inflatable portion extending upward from the lower end is formed between the corresponding chambers, and an air bag at the time of deployment is formed on the non-inflatable portion at the upper edge of the seat in the last row of the storage state that is flipped up along the side surface of the vehicle interior. Provide one or more fragile parts that break when hooked, so as to extend upward from the lower end of the airbag ,
Covering the fragile portion with a cloth material having a smaller tensile strength than the non-expanded portion provided with the fragile portion,
Most preferably, the cloth material is attached to the non-inflatable part by a sewing part formed in parallel with the fragile part on both sides of the fragile part in the longitudinal direction of the vehicle. Features.

  In the present invention, for example, when the airbag at the time of deployment is caught on the upper edge of the seat of the last row in the folded-up state, the fragile portion is broken, so that the passenger seated on each seat other than the last row There is no impact on head protection and release prevention performance outside the vehicle.

  The structure of the fragile portion is not particularly limited as long as it breaks when the airbag at the time of deployment is caught on the upper edge of the seat in the rearmost row in the stored state that is flipped up along the side surface of the vehicle interior. Should be adopted.

Further, in the present invention, the so fragile portion does not break during normal deployment, the fragile portion, and covers the fragile part is provided with non-inflatable portion tensile strength of less fabric material than, for example, a nonwoven fabric.

Further, in the present invention, the cloth material is attached to the non-inflatable portion by a sewing portion formed in parallel with the fragile portion on both sides of the fragile portion in the longitudinal direction of the vehicle. It is .

  In the present invention, when the airbag at the time of deployment is caught on the upper edge of the last row of seats in the folded-up state, the weakened portion or the tether breaks, so that the head of the occupant seated on the seat other than the last row There is no effect on the protection of parts and the release prevention performance outside the vehicle.

  Since the airbag according to the present invention is integrated except for the last row and the last row, the number of parts can be reduced by half compared to the case where the airbag other than the last row and the last row is a separate airbag. Further, since the airbags other than the last row and the last row are integrated, it is possible to easily create a cushion roll when attaching to the automobile.

It is a figure explaining the principal part of the curtain airbag apparatus of 1st this invention. It is a figure explaining the principal part of the curtain airbag apparatus of 2nd this invention. It is a figure explaining the principal part of the curtain airbag apparatus of 3rd this invention. FIG. 2 is a view of the deployed state of the curtain airbag device of the present invention as viewed from the rear of the vehicle, where (a) is a normal case where the last row of seats is not flipped up, and (b) is the last row of seats flipped up. This is the case of the stored state. It is a figure explaining the conventional curtain airbag apparatus, (a) is a figure explaining the principal part, (b) looked at the expansion | deployment state in the storage state where the sheet | seat of the last row was flipped up from the back of the vehicle. FIG.

  The present invention protects the head of an occupant seated on a seat other than the last row and prevents it from being released to the outside of the vehicle even when the airbag at the time of deployment is caught on the upper edge of the last row of seats in the folded-up storage state. The purpose is to prevent the influence on the

  For the purpose, the airbag at the time of deployment is caught on the upper edge of the seat in the stowed last row between the chamber corresponding to the seating position of the seat in the last row and the seat in the previous row. It was realized by providing weak parts that sometimes break or by connecting the chambers with a tether.

  Hereinafter, the curtain airbag device of the present invention mounted on an automobile having three rows of seats in the front-rear direction will be described with reference to FIGS.

  The curtain airbag device of the present invention is deployed in a curtain shape along the side window 6 by the gas ejected from the inflator 7 to protect the head of the seated occupant and prevent the occupant from being released outside the vehicle. An airbag 1 is provided.

  The airbag 1 is installed on a front pillar and a roof side rail of a passenger compartment together with the inflator 7 in a long state folded in a roll shape, for example, in a substantially vertical direction.

  When a high load of a predetermined value or more is applied to the side of the vehicle body due to a side collision or the like, the gas ejected from the inflator 7 inserted into the insertion portion 8 in response to a signal from the sensor passes through the duct 9. The air bag 1 is supplied to the chambers 2 to 4 and deployed in a curtain shape.

  In the present invention, even when the airbag 1 at the time of deployment is caught on the upper edge of the third row seat in the last row in the folded state, the seats in the first row and the second row other than the last row It is intended to prevent the seated occupant from having an influence on the head protection and the release prevention performance to the outside of the vehicle.

  For example, in the embodiment shown in FIG. 1, between the chambers 4 and 3 corresponding to the seating positions of the third row seat in the last row and the second row seat immediately before the last row of the airbag 1, A non-inflatable portion 10 extending upward from the lower end is formed.

  For example, the non-expandable portion 10 does not form the base fabric in a bag shape like the chambers 2 to 4 but the base fabric itself. The non-inflatable portion 10 is provided with one fragile portion 11 so as to extend upward from the lower end of the airbag 1.

  The fragile portion 11 may be any one that breaks when the airbag 1 at the time of deployment is caught on the upper edge of the third row of seats in the last row in the stored state that is flipped up along the side of the vehicle interior. Perforated.

Further, the fragile portion 11 is provided at a position corresponding to the vicinity of the frontmost portion of the third row of seats in the vehicle front-rear direction. More preferably, it is provided at a position in front of the vehicle with respect to the frontmost part of the third row of seats in the vehicle longitudinal direction.

  By providing the fragile portion 11 at such a position, a force for tearing the fragile portion 11 works conveniently when the airbag 1 is deployed. On the other hand, when the third row of seats is used by the occupant, the fragile portion 11 does not tear, and the fragile portion 11 does not break even when the entire airbag 1 is deployed in the vehicle front-rear direction and a tension acts. Will not break.

  In the embodiment shown in FIG. 2, the fragile portion 11 in the embodiment shown in FIG. 1 is covered with a cloth material having a tensile strength smaller than that of the non-expandable portion 10, for example, a nonwoven fabric 12. It is intended not to break. The nonwoven fabric 12 is attached to the non-expanded portion 10 by, for example, sewing in parallel with the fragile portion 11. Note that reference numeral 13 in FIG. 2 denotes a sewing portion that is sewn to attach the nonwoven fabric 12 to the non-inflatable portion 10.

  Further, in the embodiment shown in FIG. 3, the non-inflatable portion 10 is a space 14, and the weak portion 11 is connected between the chambers 3 and 4 corresponding to the seating positions of the third row seat and the second row seat. It is set to 15.

  In the present invention described above, when a high load of a predetermined value or more is applied to the side of the vehicle body in a normal state where the third row of seats 5 is not flipped up, the airbag 1 is It expands in a curtain shape along the window 6 (see FIG. 4A).

  On the other hand, when a high load of a predetermined value or more is applied to the side of the vehicle body in the storage state in which the third row of seats 5 is flipped up, the upper edge 5a of the third row of seats 5 in the retracted storage state is applied. When the airbag 1 in the middle of deployment is caught, the fragile portion 11 or the tether 15 is broken.

  Therefore, as shown in FIG. 4 (b), the chambers 4 in the third row are deployed on the vehicle interior side, but the chambers 2 and 3 in the first and second rows are curtained along the side window 6. Expand to.

  That is, in the curtain airbag device of the present invention, the seat 5 is seated on the seat even in the storage state in which the third row of seats 5 is raised as well as the normal state in which the third row of seats 5 is not raised. It can protect the head of the passenger and prevent it from being released outside the vehicle with the expected performance.

  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 3 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 embodiment shown in FIGS. 1 and 2, one weak portion 11 is provided, but a plurality of weak portions 11 may be provided.

  Moreover, in the Example of FIG.1 and FIG.2, although the weak part 11 is made into the perforation, as long as there exists the same effect | action, you may arrange | position the cloth material with weak tensile strength.

  Further, in FIG. 2, the nonwoven fabric 12 is attached to the non-expanded portion 10 by sewing in parallel with the fragile portion 11, but the same direction as the fragile portion 11 is not necessarily parallel to the fragile portion 11. (Parallel) is sufficient.

  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 Air bag 2 1st row chamber 3 2nd row chamber 4 3rd row chamber 5 3rd row seat 5a Upper edge 7 Inflator 8 Insertion part 9 Duct 10 Non-inflatable part 11 Fragile part (perforation)
12 Nonwoven fabric 13 Sewing part 14 Space 15 Tether

Claims (3)

An inflator,
An insertion portion of the inflator, a chamber developed by gas injected from the inflator, and an airbag having a duct connecting the chamber and the insertion portion;
With
The airbag has a plurality of chambers corresponding to a seating position of each row of an automobile having three or more rows in a vehicle front-rear direction, and a seating position of a seat in the last row and a seat in front of the last row. A non-inflatable portion extending upward from the lower end is formed between the corresponding chambers, and an air bag at the time of deployment is formed on the non-inflatable portion at the upper edge of the seat in the last row of the storage state that is flipped up along the side surface of the vehicle interior. Provide one or more fragile parts that break when hooked, so as to extend upward from the lower end of the airbag,
Covering the fragile portion with a cloth material having a smaller tensile strength than the non-expanded portion provided with the fragile portion,
The cloth material is attached to the non-inflatable part by a sewing part formed in parallel with the fragile part and spaced from the fragile part on both sides of the fragile part in the longitudinal direction of the vehicle. Curtain airbag device.   The curtain airbag device according to claim 1, wherein the fragile portion is a perforation.   The curtain airbag device according to claim 1, wherein the cloth material is a non-woven fabric.

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