JP2007283786A - Air bag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air bag device capable of preventing untying of a joining part caused by a vent hole with a high degree of freedom in a disposing position of the vent hole. <P>SOLUTION: In this air bag device, the vent hole 48 is disposed in an air bag 13 formed into a bag shape by joining peripheral edges of a plurality of sheets of base clothes 37 by peripheral edge joining parts 39A to 39N and joining the inside by inside joining parts 43N, 43O, 43P and 43Q to discharge gas in the air bag 13. The vent hole 48 is provided at a position surrounded by the inside joining parts 43N, 43O, 43P and 43Q. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an airbag device that deploys an airbag in an emergency of a vehicle.

There is an airbag device that inflates and deploys an airbag to protect an occupant in an emergency of a vehicle. In the airbag of such an airbag device, a peripheral portion of a plurality of base fabrics and the inside thereof are interwoven and formed into a bag shape, and a vent hole that discharges gas in the airbag for adjusting internal pressure or the like is provided. There is one formed by the interrupting portion of the peripheral weaving (for example, see Patent Document 1).
JP 11-91492 A

  However, if the vent hole is formed at the interrupting portion of the peripheral weaving as described above, the arrangement position of the vent hole is limited to the peripheral edge, and the degree of freedom is limited. In addition, when the vent hole is formed at the interrupting portion of the peripheral weaving, there is a possibility that the weaving may be released from the vent hole when a load is applied. Therefore, it is conceivable to form a vent hole by weaving in a bent shape, but an extra base fabric is required around the bent portion.

  Therefore, an object of the present invention is to provide an airbag device that has a high degree of freedom in the vent hole arrangement position and can prevent the joint from being unraveled due to the vent hole.

  In order to achieve the above object, the invention according to claim 1 is characterized in that the peripheral edges of a plurality of base fabrics (for example, the base fabric 37 in the embodiment) are joined by peripheral joint portions (for example, the peripheral joint portions 39A to 39N in the embodiment). In addition, the airbag is joined to the airbag (for example, the airbag 13 in the embodiment) which is formed into a bag shape by being joined at the inner joint portions (for example, the inner joint portions 43N, 43O, 43P, and 43Q in the embodiment). An air bag apparatus in which a vent hole (for example, vent hole 48 in the embodiment) for discharging gas inside is disposed, and the vent hole is provided at a position where the inner joint portion is arranged around the vent hole. It is characterized by having.

  The invention according to claim 2 is the invention according to claim 1, wherein the inner joint portion around the vent hole has an internal opening (for example, the internal opening 45 in the embodiment). The end portions of the inner joint portion to be formed (for example, the end portions 43Pb and 43Qb in the embodiment) are bent toward the vent hole side.

  The invention according to claim 3 is the invention according to claim 2, characterized in that the internal opening is directed to the vent hole.

  According to the first aspect of the present invention, the vent hole for discharging the gas is disposed in the bag-shaped airbag having the peripheral edge joined at the peripheral joint and the inner joint joined at the inner joint, and the inner joint is disposed around the bag-shaped airbag. Since it is provided at the position where it is disposed, it can be disposed other than the peripheral edge, and the degree of freedom of the disposed position is increased. Moreover, since the vent hole is not provided in the peripheral joint portion, it is possible to prevent the joint portion from being unraveled due to the vent hole. Furthermore, there is a possibility that the vent hole may be deformed along with the outer shape of the airbag due to contact with the occupant when the airbag is inflated. The effect on the vent hole due to deformation of the bag can be reduced, and stable gas discharge can be achieved.

  According to the invention of claim 2, since the inner joint around the vent hole has the internal opening, gas is discharged from the vent hole through the internal opening, and the vent is opened by the internal opening. The flow rate of gas to the hall can be defined and adjusted. Since gas is discharged from the vent hole through the internal opening, the load on the vent hole can be reduced. Since the end of the inner joint that forms the internal opening is bent toward the vent hole, the strength of the joint that forms the internal opening can be improved.

  According to the invention of claim 3, since the internal opening is directed to the vent hole, the gas smoothly flows toward the vent hole.

An airbag apparatus according to an embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 schematically shows an attachment state of the airbag device 11 of the present embodiment to a vehicle body 12, and shows a bag-like airbag 13 constituting the airbag device 11 in a deployed state.

  As shown in FIG. 1, a roof side rail 15 that forms a side end portion of the roof of the vehicle body 12 along a vehicle front-rear direction includes a front pillar 16, a center pillar 17, a rear quarter pillar 18, and the like in order from the vehicle front side. The rear pillar 19 is connected so as to extend downward. In the vehicle body 12, a front side window 25 at the top of the front door is disposed between the front pillar 16 and the center pillar 17, and a rear side window 26 at the top of the rear door is disposed between the center pillar 17 and the rear quarter pillar 18. A rear quarter window 27 is disposed between the rear quarter pillar 18 and the rear pillar 19.

  And in the airbag apparatus 11 of this embodiment, the one airbag 13 is attached to the vehicle interior side of the above-mentioned roof side rail 15 so that this roof side rail 15 may be followed.

  The airbag 13 is attached to the front side window 25, the center pillar 17, the rear side window 26, the rear quarter pillar 18 and the rear quarter window 27 along the roof side rail 15, and the front side window 25, the rear quarter window 18 and the rear quarter window 27 are used for inflating and deploying. The side window 25, the center pillar 17, the rear side window 26, the rear quarter pillar 18, and the rear quarter window 27 are deployed in the form of a curtain along these. That is, the airbag 13 covers the side of the passenger seated in the first row seat not shown, the passenger seated in the second row seat not shown, and the passenger seated in the third row seat not shown.

  In the airbag 13, a connection port 31 that opens rearward on the front side and a connection port 32 that opens frontward on the rear side so as to face the connection port 31 are formed slightly rearward of the upper middle portion. Yes.

  The airbag device 11 is attached to the rear quarter pillar 18 and connected to a front connection port 31 of the airbag 13 so as to introduce gas from an intermediate portion of the airbag 13 toward the front portion. An inflator 34 that is attached to the quarter pillar 18 and is connected to the connecting port 32 on the rear side of the airbag 13 and introduces gas toward the rear portion of the airbag 13 is provided.

  The airbag 13 has a bag shape in which the peripheral edges of a plurality of base fabrics 37 (only one on the front side in FIG. 1) are joined by linear peripheral joint portions 39A to 39N by sewing, weaving, bonding, or the like. There is no.

  That is, the airbag 13 includes a peripheral joint 39A along the rear edge, and a peripheral joint extending from the upper end of the peripheral joint 39A to the upper edge of the rear connection port 32 along the upper edge of the rear portion of the airbag 13. 39B, a peripheral joint portion 39C extending along the middle portion of the airbag 13 and the upper edge of the front portion from the upper edge of the connecting port 31 on the front side of the airbag 13, and the front end of the peripheral joint portion 39C extending downward from the front side. Peripheral joint 39D, and a peripheral joint 39E extending further forward and downward from the front end of the peripheral joint 39D. The lower end 39Ea of the peripheral joint 39E is centered on the upper side. It has a semicircular shape and extends forward.

  The airbag 13 extends from the lower end of the peripheral joint portion 39A to the intermediate predetermined position along the lower edge of the rear portion of the airbag 13 and extends substantially vertically upward from the front end of the peripheral joint portion 39F. A peripheral joint 39G to be ejected, a peripheral joint 39H that is folded semicircularly from the upper end of the peripheral joint 39G, a peripheral joint 39I that extends substantially vertically downward from the front end of the peripheral joint 39H, and the peripheral The peripheral joint 39J extending forward from the lower end of the joint 39I, the peripheral joint 39K extending forward with an arc shape centered on the lower side from the front end of the peripheral joint 39J, and the peripheral joint The peripheral joint portion 39L extends forward from the front end of the portion 39K, and the peripheral joint portion 39M extends forward from the front end of the peripheral joint portion 39L. The front end portion of the peripheral joint portion 39M 9Ma is extended forward to form a semicircular shape having a center on the lower side.

  Furthermore, the airbag 13 has a peripheral joint 39N that connects the lower edge of the front connection port 31 and the lower edge of the rear connection port 32 to the lower side.

  As described above, the airbag 13 includes the upper connecting ports 31 and 32, and the lower end portion 39Ea of the peripheral joint portion 39E and the front vent hole 41 between the front end portions 39Ma of the peripheral joint portion 39M. It is an opening that is formed by ˜39N and communicates the inside and outside of the airbag 13. Therefore, when gas is introduced into the airbag 13 from the inflators 33 and 34 through the upper connection ports 31 and 32, the inner side of the plurality of base fabrics 37 joined at the peripheral joints 39 </ b> A to 39 </ b> N. Will be inflated into a bag shape so as to be separated from each other, and part of the gas will be discharged from the vent hole 41 in order to adjust the internal pressure in the airbag 13.

  The airbag 13 has inner joint portions 43A to 43Q formed by sewing, weaving, bonding, or the like inside the peripheral joint portions 39A to 39N of the plurality of base fabrics 37 so that the airbag 13 is inflated in the form of a plate at the time of inflation. It is joined with.

  That is, the airbag 13 includes a linear inner joint portion 43A that extends rearward from an intermediate position of the peripheral edge joint portion 39E on the front end side thereof and then extends upwardly to the front side of the peripheral edge joint portion 39D. An annular inner joint 43B formed at the end of 43A on the peripheral joint 39D side, a linear inner joint 43C that is substantially U-shaped between the inner joint 43A and the peripheral joint 39I, and an inner side Inner joint portions 43D and 43E that form an annular shape at both ends of the joint portion 43C are provided.

  The airbag 13 includes a linear inner joint 43F extending forward from the lower side of the connection ports 31 and 32, inner joints 43G and 43H each having an annular shape at both ends of the inner joint 43F, and an inner joint. 43G has a linear inner joint 43I extending slightly downward from the inner joint 43I, and an inner joint 43J having an annular shape at the end opposite to the inner joint 43G of the inner joint 43I. .

  Further, the airbag 13 includes a linear inner joint 43K extending in the front-rear direction between the peripheral joint 39B and the peripheral joint 39F, and inner joints 43L and 43M each having an annular shape at both ends of the inner joint 43K. A linear inner joint 43N extending forward from the peripheral joint 39A side of the peripheral joint 39F to the lower side of the inner joint 43K, and an inner joint 43O forming a ring at the front end of the inner joint 43N And have.

  Further, as shown in FIG. 2, the airbag 13 has a linear main portion 43Pa extending downward from the inner joint portion 43O, and an abbreviated shape that curves backward from the lower end of the main portion 43Pa and has an upper center. An inner joint 43P composed of a linear end portion 43Pb extending in an arc shape and a substantially arc shape centered on the front side from the middle of the inner joint portion 43N are extended downward and then extended forward. It has a linear main portion 43Qa and an inner joint portion 43Q composed of an end portion 43Qb that curves upward from the front end of the main portion 43Qa and extends in a substantially arc shape having a center on the rear side.

  Here, the end portion 43Pb of the inner joint portion 43P and the end portion 43Qb of the inner joint portion 43Q are opposed to each other with a gap, and the inner joint portions 43P and 43Q and the inner joint portions 43N and 43O are end portions. The portions 43Pb and 43Qb are connected in a circular shape except that there is a gap between them. As a result, the bag interior space 46 that opens at the internal opening 45 between the end portions 43Pb and 43Qb to the other portions in the airbag 13 by the plurality of base fabrics 37 and the inner joint portions 43N, 43O, 43P, and 43Q. Is formed.

  Then, on the base fabric 37 on the outside of the passenger compartment, the bag inner space portion 46 is disposed outside the inner joint portions 43N, 43O, 43P, and 43Q at positions inside the inner joint portions 43N, 43O, 43P, and 43Q. A vent hole 48 is formed to be opened. The vent hole 48 discharges the gas in the airbag 13 introduced into the bag interior space 46 through the internal opening 45 to the outside. In other words, the vent hole 48 is provided at a position where the inner joint portions 43N, 43O, 43P, and 43Q are arranged around the vent hole 48. Further, the inner joint portions 43N, 43O, 43P, and 43Q around the vent hole 48 have an internal opening 45 that opens to other portions in the airbag 13, and forms the internal opening 45. End portions 43Pb and 43Qb of the inner joint portions 43P and 43Q are bent toward the vent hole 48 side. Further, the inner opening 45 is directed to the vent hole 48. That is, the center lines of the end portions 43Pb and 43Qb of the inner joint portions 43P and 43Q forming the inner opening 45 are directed to the vent hole 48. The vent hole 48 is formed by punching out the base cloth 37, for example, and the surrounding base cloth 37 is reinforced by sewing or the like as necessary. The vent hole 48 may be provided with a cover for controlling the gas discharge direction and timing.

  Such an air bag 13 is attached along the roof side rail 15 in a folded and elongated state, and gas is supplied from the inflators 33 and 34 that are driven when appropriate deployment conditions are met. While the interior material (not shown) is pushed open, the front side window 25, the center pillar 17, the rear side window 26, the rear quarter pillar 18 and the rear quarter window 27 swell to the vehicle interior side. At that time, the base fabric 37 expands in a bag shape with the peripheral joint portions 39A to 39N as the peripheral portion, but the expansion is partially restricted by the inner joint portions 43A to 43Q, so that the board as a whole It expands into a shape. In order to adjust the internal pressure, the internal gas is appropriately discharged from the vent hole 41 and is also appropriately discharged from the vent hole 48 through the internal opening 45. In the above embodiment, one internal opening 45 is provided for the vent hole 48. However, the number of the internal openings 45 is not limited to one, and a plurality of internal openings 45 may be provided.

  According to the airbag device 11 of the present embodiment described above, the gas is discharged to the bag-shaped airbag 13 whose peripheral edge is joined by the peripheral joint portions 39A to 39N and the inner side is joined by the inner joint portions 43A to 43Q. Since the vent hole 48 is provided at a position where the inner joint portions 43N, 43O, 43P, and 43Q are disposed around the vent hole 48, the vent hole 48 can be disposed at a position other than the periphery, and the degree of freedom of the disposed position is increased. Further, since the vent holes 48 are not provided in the peripheral joint portions 39A to 39N, it is possible to prevent the joint portions from being unraveled due to the vent holes 48. Further, the vent hole 48 may be deformed together with the outer shape of the airbag 13 due to contact with the occupant when the airbag 13 is inflated, but the inner joint portions 43N, 43O, which can suppress deformation around the vent hole 48. Since 43P and 43Q are arranged, the influence on the vent hole 48 due to the deformation of the airbag 13 can be reduced, and stable gas discharge becomes possible.

  Further, since the inner joint portions 43N, 43O, 43P, and 43Q around the vent hole 48 have the internal opening 45, gas is discharged from the vent hole 48 through the internal opening 45, and the internal opening The flow rate of the gas to the vent hole 48 can be defined and adjusted by the portion 45. In addition, since the gas is discharged from the vent hole 48 through the internal opening 45, the load on the vent hole 48 can be reduced. Furthermore, since the end portions 43Pb and 43Qb of the inner joint portions 43P and 43Q that form the inner opening 45 are bent toward the vent hole 48, the strength of the joint portion that forms the inner opening 45 can be improved.

  Furthermore, since the internal opening 45 is directed to the vent hole 48, the gas flows smoothly toward the vent hole 48, and smooth internal pressure control becomes possible.

  In the above embodiment, the airbag 13 is deployed in a curtain shape along the front side window 25, the center pillar 17, the rear side window 26, the rear quarter pillar 18 and the rear quarter window 27, so-called curtain airbag apparatus. However, the present invention can be applied to other various airbag devices.

1 is a side view schematically showing a state in which an airbag is deployed in an airbag apparatus according to an embodiment of the present invention. It is a side view which shows the principal part of the airbag in the airbag apparatus of one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Airbag apparatus 13 Airbag 37 Base fabric 39A-39N Peripheral junction part 43N, 43O, 43P, 43Q Inner junction part 43Pb, 43Qb End part 45 Internal opening part 48 Vent hole

Claims (3)

A vent hole for discharging the gas in the airbag is provided in an airbag formed in a bag shape with the periphery of a plurality of base fabrics joined at the periphery joining portion and the inside joined at the inside joining portion. An airbag device comprising:
The airbag apparatus according to claim 1, wherein the vent hole is provided at a position where the inner joint portion is disposed around the vent hole.   The inner joint around the vent hole has an internal opening, and an end of the inner joint that forms the internal opening is bent toward the vent hole. Item 2. The airbag device according to Item 1. The airbag device according to claim 2, wherein the internal opening is directed to the vent hole.

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