JP2008007065A - Airbag and airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a curtain airbag device for covering a window part on the side of an automobile which is capable of suppressing any bottoming feeling at a part of a pillar, and preventing an occupant from being thrown outside the automobile. <P>SOLUTION: An airbag 1 which is folded in a slender shape and stored in a roof side part 5 of a vehicle is developed along a window part 8 and a center pillar 12. A pillar covering part 44 which covers the center pillar 12 and is developed is provided on the airbag 1. A lower inflation part 45 is provided continuous to a lower part of the pillar covering part 44. A connection line part 71 for connecting base cloth parts 33, 34 to each other is provided along the pillar covering part 44. The connection line part 71 comprises a straight part 72 substantially along the center pillar 12 and an intersecting part 73 which is smoothly curved from a lower end of the straight part 72 and overlaps a part of the center pillar 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to, for example, an airbag and an airbag device that are deployed along a window on a side portion of an automobile.

  2. Description of the Related Art Conventionally, a so-called curtain airbag device that deploys along a window portion of a door on the side of a vehicle cabin is known as an airbag device including an airbag that is inflated and deployed by introducing gas. Such an airbag device is normally folded in an elongated shape and is disposed along the upper edge of the window portion on the side surface of the passenger compartment. When an impact such as a side collision or rollover (rollover) is received, gas is supplied from the inflator and the airbag is deployed, and is deployed downward along the side windows and the like. .

  In this regard, the vehicle includes a first chamber in which gas is directly introduced from the inflator and deployed, and a second chamber adjacent to the first chamber via a breathable panel. In a side collision or rollover, a configuration is known in which an occupant is prevented from coming into direct contact with a pillar or window glass or being thrown out of the vehicle (release outside the vehicle) (see, for example, Patent Document 1). Further, in this configuration, when the first chamber receives the head of the occupant and the internal pressure of the first chamber increases to a predetermined pressure or more, the gas passes through the breathable panel and flows into the second chamber. In addition, the pressure fluctuations are made gentle and the occupant's head is protected for a long time. However, in this configuration, the relationship between the configuration of the airbag and the pillar is not shown, and a feeling of bottoming may occur at the pillar portion. Further, a maintenance structure for maintaining the state in which the inflated airbag closes the window without causing a gap is not shown even when the vehicle rolls over, and such a maintenance structure is provided separately from the airbag. In addition, the airbag device becomes larger and more complicated, and the mounting work on the vehicle body becomes complicated, resulting in an increase in manufacturing cost.

In addition, for such an airbag, a configuration in which an elongated cylindrical air chamber is provided at the front and rear along the lower end portion of the airbag and an extending portion is extended from the front and rear ends of the cylindrical air chamber is known. (For example, see Patent Document 2). In this configuration, when the airbag is inflated, the front and rear extending portions are in contact with the inside of the vehicle body, so that the passenger can be effectively prevented from being released from the vehicle. However, in this configuration, the relationship between the configuration of the airbag and the pillar is not shown. Further, depending on the shape of the front and rear extending portions, the volume of the airbag becomes large, and it is necessary to enlarge the inflator.
Japanese Patent Laid-Open No. 2004-210257 JP 2005-239038 A

  Today, there is a demand for a configuration that can prevent a passenger from being released from the vehicle while maintaining a state in which the window portion is closed with a simple configuration, and suppress a feeling of bottoming at the pillar portion.

  The present invention has been made in view of such a point, and can maintain an air bag deployment position and a deployment shape that are firmly held and an opening is closed, and can suppress a feeling of bottoming at a columnar portion. An object is to provide a bag and an airbag device.

  The airbag according to claim 1 is an airbag that is deployed along a predetermined surface having an opening that can be opened and a columnar portion that is adjacent to the opening, and is deployed for opening that covers the opening. Connected to the opening, the opening for the opening and the opening for the opening, and communicated with at least the downstream of the opening for the opening. And a downstream side development part that develops in a columnar shape in a direction intersecting with the development part for the columnar part.

  In this configuration, when the gas is introduced into the airbag, the opening deployment portion and the columnar deployment portion are deployed to cover the opening and the columnar portion. Further, the gas is introduced at least from the columnar portion developing portion to the downstream developing portion, and the downstream developing portion expands in a columnar shape in a direction intersecting the columnar portion expanding portion. The column-shaped portion developing portion that covers and extends the columnar portion reduces the impact when the protected object is directed to the columnar object side, and prevents a feeling of bottoming at the columnar portion. Further, the deployment position and the deployment shape of the airbag including the deployment portion for the opening portion are formed by the deployment portion for the columnar portion that deploys in a columnar shape, and the downstream deployment portion that deploys in a columnar shape in a direction intersecting the deployment portion for the columnar portion. Is firmly held, and the state where the airbag covers and closes the opening is maintained.

  The airbag according to claim 2 is the airbag according to claim 1, wherein the opposite base fabric portions constituting the outer shell of the columnar portion deployment portion and the gas flow direction of the columnar portion deployment portion are arranged. A straight line part and a connecting line part that is curved in a direction intersecting with the straight line part and intersects with a part of the columnar part developing part and connects the base cloth parts. .

  In this configuration, the gas is guided by the linear portion of the connecting line portion, and the shape of the columnar portion developing portion is defined. Further, when the object to be protected comes into contact with the deployed airbag and receives a force by the intersecting portion that is curved in a direction intersecting with the straight portion and intersects a part of the deployment portion for the columnar portion, the straight line of the connecting line portion The airbag is restrained from bending along the portion, the deployment shape of the airbag including the deployment portion for the opening is firmly held, and the state where the airbag covers and closes the opening is maintained.

  The airbag according to claim 3 is the airbag according to claim 1 or 2, wherein the downstream deployment portion is located downstream of the communication portion communicating with the columnar deployment portion, and regulates the flow of gas. A gas regulation unit is provided.

  In this configuration, when the protected object comes into contact with the columnar portion developing portion, the gas in the columnar portion developing portion is prevented from moving to the downstream side of the downstream developing portion. The feeling of bottoming out is effectively prevented.

  According to a fourth aspect of the present invention, in the airbag according to the third aspect, the gas regulating portion blocks a gas flow.

  In this configuration, when the protected object comes into contact with the columnar portion developing portion, the gas in the columnar portion developing portion is prevented from moving to the downstream side of the downstream developing portion, and at the columnar portion portion. The feeling of bottoming out is effectively prevented.

  The airbag device according to claim 5 includes a gas introduction portion into which gas is introduced and a gas guide portion that communicates with the gas introduction portion, and the airbag device according to claim 1. And an inflator for supplying gas to the gas introduction part, and the predetermined surface is a surface part along a center pillar that is a window part and a columnar part that can be opened in a vehicle compartment of the vehicle, and the air The bag is folded and stored at a storage position along the upper edge portion of the predetermined surface, the gas guide portion is developed along the upper edge portion of the window portion, and the downstream side development portion is arranged on the window portion. The column-shaped portion developing portion is developed along the lower edge portion, and is developed in a direction substantially orthogonal to the gas guide portion and the downstream side developing portion.

  In this configuration, when the airbag is deployed, the columnar portion deployment portion suppresses the feeling of bottoming at the center pillar portion, and the columnar portion deployment portion and the downstream deployment portion reduce the airbag. The unfolded position and unfolded shape are firmly held, and release from the vehicle through the window of the passenger in the passenger compartment is prevented.

  According to the airbag of the present invention, the columnar part deploying part that covers and deploys the columnar part reduces the impact when the protected object is directed to the columnar part, and provides a feeling of bottoming at the columnar part. Can be prevented. Further, the deployment position and the deployment shape of the airbag including the deployment portion for the opening portion are formed by the deployment portion for the columnar portion that deploys in a columnar shape, and the downstream deployment portion that deploys in a columnar shape in a direction intersecting the deployment portion for the columnar portion. Is firmly held, and the airbag can be held in a closed state covering the opening.

  According to the airbag device of the present invention, the columnar portion deployment portion can suppress the feeling of bottoming at the center pillar portion while the airbag is deployed, and the columnar portion deployment portion and the downstream deployment portion. Thus, the deployment position and the deployment shape of the airbag can be firmly held, and release from the outside of the vehicle through the window of the passenger in the passenger compartment can be prevented.

  Hereinafter, an embodiment of an airbag and an airbag device of the present invention will be described with reference to the drawings.

  In FIG. 1 to FIG. 3, reference numeral 1 denotes an airbag, and an airbag device 2 provided with the airbag 1 is also called a curtain airbag device, and serves as a storage position of a compartment of a vehicle body 3 of an automobile, which is a vehicle. It is arranged on the roof side part 5. The airbag 1 is also called a curtain airbag, a side-impact airbag, an inflatable curtain, or a head protection airbag. The airbag 1 is subjected to a side impact or rollover. For example, it is developed in a plane substantially on the side of the occupant to protect the occupant as a protected object.

  The vehicle body 3 includes a front seat and a rear seat in which a passenger can sit in the vehicle interior, and forms a predetermined surface as an opening that can be opened at the top corresponding to the front seat and the rear seat. The door (not shown) provided with the window part (side window) 8 to perform is provided. Also, on both sides of the passenger compartment, from the front side (the right side in each figure), there are a front pillar 11 called A pillar, a center pillar 12 called B pillar as a pillar part, and a rear pillar 13 called C pillar. Is provided. The window 8, the door, and the pillars 11, 12, 13 constitute a predetermined surface 14 on both sides of the passenger compartment. Further, a vehicle body panel constituting a member to be attached, which is also called a roof side rail, is provided on the upper side of the pillars 11, 12, and 13, that is, the upper edge portion that is one edge portion of the window portion 8, and the vehicle body panel is provided via the vehicle body panel. The ceiling panel as a ceiling part is supported. A front glass (front windshield) is provided on the front side of the front pillars 11 on both sides, and a rear glass is provided on the rear side of the rear pillars 13 on both sides. And the roof side part 5 as a storage position is set from the edge part of the both sides of a ceiling panel to the part concerning the substantially full length of the front pillar 11 extended in the direction which intersects with this edge part. A predetermined surface 14 on which the airbag 1 is deployed is set on the inner corner side virtually constituted by the edge portion of the ceiling panel and the front pillar 11.

  The vehicle body side and the ceiling panel are covered with a part of each pillar 11, 12, 13 by a headlining (roofing) (not shown) which is a soft or deformable ceiling plate and is an interior decoration panel. ing. Each seat is provided with a seat belt, and the center pillar 12 is provided with a support portion 12a for supporting these seat belts. Further, first to third pillar garnishes, which are interior materials, are attached to the entire length of each pillar 11, 12, 13 or a part of the passenger compartment side, and these pillars 11, 12, 13 are covered. . Further, although not shown, an elastically deformable packing body made of a soft resin or the like is attached to the lower end portion of the vehicle body panel. This packing body is also called a welt or a body seal, and the upper portions of the doors come into contact with each other and come into close contact with each other.

  Here, the center pillar 12 is not a pillar at the front and rear ends but a pillar covered by the deployed airbag 1. Depending on the type of vehicle, for example, four or more pillars may be provided on one side, but the third and subsequent pillars from the front will be described as the rear pillar 13.

  The airbag device 2 is a so-called front / rear seat airbag that can protect passengers in the front and rear seats. The airbag device 2 is stored in an elongated state in a roof side portion 5 surrounded by a vehicle body panel and a head lining. A bag 1 and an inflator 25 that is housed behind or above the rear seat and supplies gas to the airbag 1 are provided. In addition, the airbag device 2 is attached along a mounting bracket formed by pressing a metal plate that attaches the airbag 1 to the vehicle body panel, or the folded airbag 1 as necessary. A protector made of resin for protecting the bag 1, a sleeve as a breakable cylindrical or string-shaped holding member for holding the shape of the folded airbag 1, a tether belt 29 connected to the front end of the airbag 1, etc. Is provided. Furthermore, in this embodiment, the assist grip 30 is attached to the attachment bracket.

  The airbag 1 is a combination of a single base fabric or a plurality of base fabrics. For example, an airbag main body formed in a flat bag shape by folding back one base fabric or stacking and joining two base fabrics. 31 and an attachment piece portion 32 constituting an attachment portion extending from a plurality of locations of the airbag main body portion 31 and the like, and is folded into an elongated shape and stored in the roof side portion 5.

  The airbag main body 31 overlaps an inner base fabric portion 33 disposed on the vehicle interior side with an outer base fabric portion 34 disposed on the outer side which is the vehicle body side, and a predetermined sewing portion which is a joint portion. A bag-like inflatable portion 35 that inflates and expands when gas flows in, a gas introduction portion 36 that is located at the upper rear end of the airbag main body 31 and communicates the inflatable portion 35 to the outside, and a gas inflow A non-inflatable portion 37 that does not inflate and expand is provided.

  Further, the inflating portion 35 is a hollow air chamber, and communicates with the gas guide portion 41 located along the upper edge portion of the airbag body portion 31 and the lower side, which is the downstream side of the gas guide portion 41. A front seat protection part 42 as a first inflating part as an opening development part and a rear seat protection part 43 as a second inflating part, and between the front seat protection part 42 and the rear seat protection part 43 The pillar covering portion 44 as a deployed portion for the columnar portion is positioned along the lower edge portion of the airbag main body 31 so as to communicate with the lower side, which is the downstream side of the protective portions 42 and 43 and the pillar covering portion 44. And a lower expansion part 45 as a downstream development part. Then, the gas guide portion 41 is developed along a substantially entire length of the upper edge portion of the airbag body portion 31, that is, in a substantially horizontal columnar shape with the front-rear direction as the axial direction which is the longitudinal direction. Further, the lower inflating portion 45 is deployed along a substantially entire length of the lower edge portion of the airbag body portion 31, that is, in a substantially horizontal columnar shape with the front-rear direction as the axial direction which is the longitudinal direction, but provided at a predetermined position. It is divided forward and backward by the gas regulating part 47. Further, the pillar covering portion 44 has a width dimension substantially equal to that of the center pillar 12 or a width dimension larger than that of the center pillar 12.

  Further, the sewing portion is configured to be substantially airtight or highly airtight by sewing, bonding, or a combination of sewing and sealing means, and an outer peripheral sewing portion 51 that is an outer peripheral connecting portion for sewing the outer periphery of the inflating portion 35, and A restricting portion 52 is provided which is located in a region surrounded by the outer peripheral sewing portion 51 and defines the protective portions 42 and 43, the pillar covering portion 44, and the like, and restricts the width of each portion when unfolded. The restricting portion 52 is located at one or a plurality of locations of the inflating portion 35 and is formed integrally with or separately from the outer peripheral sewing portion 51. Each restricting portion 52 is formed with a linear line portion 53 and an annular protection portion 54 that is located at the end of the line portion 53 or upstream of the gas and protects the line portion.

  In the present embodiment, the restricting portion 52 includes a front restricting portion 56 located in the front seat protecting portion 42, a first and second rear restricting portions 57 and 58 located in the rear seat protecting portion 43, A connecting line portion 71 formed substantially along the pillar covering portion 44 is formed. The front side restricting part 56 and the second rear side restricting part 58 are substantially U-shaped with the upper side, that is, the upstream side opened, and the first rear side restricting part 57 is formed in an annular shape and the inside thereof is not inflated. It is part 37.

  Further, in the present embodiment, the connecting line portion 71 defines a rear side portion of the pillar covering portion 44, and substantially extends along the pillar covering portion 44, that is, the center pillar 12 in a state where the airbag 1 is deployed. A vertical straight line 72 formed along the rear edge of the center pillar 12 is formed with the vertical direction, that is, the vertical direction as the longitudinal direction, and the center pillar is curved smoothly downstream to the lower end of the straight line 72. And a curved crossing portion 73 extending to a position overlapping with a part of 12, which is formed in a substantially J-shape or abbreviated-shape.

  And the lower end part of this connection line part 71 is aligned with the lower end part of each regulation part 56,57,58 substantially or correctly, and blocks the gas flow except for the part of the gas regulation part 47. The lower inflatable portion 45 formed below the restricting portions 56, 57, and 58 covers a lower end portion of the center pillar 12 in part, that is, a portion continuing to the pillar covering portion 44. It is like that.

  Further, in this embodiment, the gas regulating part 47 is formed continuously with the regulating part 52 integrally. The gas restricting portion 47 extends vertically downward from the vicinity of the rear end portion of the front restricting portion 56 and continues to the outer peripheral sewing portion 51. Therefore, the gas regulating part 47 hermetically closes the lower inflating part 45 on the downstream side of the communicating part 75 where the pillar covering part 44 communicates with the lower inflating part 45. The position of the gas restricting portion 47 is not limited to the position close to the pillar covering portion 44, and can be provided at any position where the front restricting portion 56 and the outer peripheral sewing portion 51 are connected.

  Further, between the inner base fabric portion and the outer base fabric portion, the inner pipe 77, the front side, as a means for guiding the gas or regulating the width dimension of the expansion portion during deployment, as necessary. A partition body or a rear partition body is attached by sewing or the like. Further, in this embodiment, a slight non-inflatable portion 37 is formed at each of the front end portion of the upper end portion and the lower end portion of the rear end portion of the airbag body portion 31, and the non-inflatable portion 37 is fixed to be attached to the vehicle body. A point 79 is formed.

  A plurality of attachment pieces 32 of the airbag 1 are formed at predetermined positions on the upper edge of the airbag body 31. Each attachment piece 32 is formed integrally with the base fabric portion constituting the airbag main body 31, and is formed, for example, by overlapping and sewing the inner base fabric portion 33 and the outer base fabric portion 34. ing. Each attachment piece 32 protrudes from the airbag body 31 in a tongue-like shape, and an attachment hole 32a having a circular hole shape is formed.

  Next, the assembly process of this airbag apparatus 2 and the attachment process to the vehicle body 3 are demonstrated.

  First, the airbag 1 is folded in a flat shape, the airbag body 31 is folded into a predetermined elongated shape, the folded shape is maintained using a sleeve, a protector and a mounting bracket are attached, and a rear end portion A connecting pipe 25b extending from the cylindrical main body portion 25a of the inflator 25 is connected to the gas introducing portion 36. The airbag body 31 can be folded in various ways. For example, the lower portion is folded into a roll shape to form an accumulation portion, and the upper portion is formed from both sides. It can be folded as a parasol-shaped guide for wrapping.

  Then, the airbag device (curtain airbag module) 2 is brought into the vehicle interior, and is attached to the vehicle body 3 before the interior members such as the head lining and the pillar garnish are attached. This attachment work is performed by fixing the plurality of attachment pieces 32, the fixing points 79, the attachment portions provided on the inflator 25, and the attachment brackets of the airbag 1 to the vehicle body with a fixture such as a bolt. Further, the harness led out from the inflator 25 is connected to a control device provided in the vehicle body 3. Next, the head lining is attached to the ceiling panel of the vehicle body 3, the pillar garnish is attached to each of the pillars 11, 12, and 13 to cover the airbag device 2, thereby completing the operation of attaching the airbag device 2 to the vehicle body 3. .

  Next, the deployment operation of the airbag 1 will be described.

  In the event of a side collision or rollover of the vehicle, the inflator 25 is actuated by the control device, and the gas injected from the inflator 25 is expanded from the gas introduction part 36 through the connecting pipe 25b to the inflating part 35 in the airbag body part 31. To be introduced. Then, the inflating portion 35 of the airbag main body 31 is inflated and deployed while pushing away the head lining and the front and rear pillar garnishes, and quickly inflated and deployed in a curtain shape in a predetermined direction along the predetermined surface 14. The window 8 and the center pillar 12 are covered.

  At this time, in the expansion part 35, the gas guide part 41 is rapidly deployed from the rear end part to the front end part, and from the gas guide part 41, the front seat protection part 42, the rear seat protection part 43, and the pillar covering part 44 are provided. Gas is supplied to the front seat protection section 42, the rear seat protection section 43, and the pillar covering section 44, and further, the front seat protection section 42, the rear seat protection section 43, and the pillar covering section 44 are provided below. Gas is supplied to the expansion part 45 and the lower expansion part 45 expands. That is, in this embodiment, the lower side is basically the upper side, and the front side is the downstream side rather than the rear side. However, since the lower inflating portion 45 is partitioned by the gas restricting portion 47, the portion on the front side of the gas restricting portion 47 is inflated and deployed by the gas that flows from the front portion of the front seat protecting portion 42 to the rear side. .

  And this airbag 1 can protect the passenger | crew who is a to-be-protected object which contact | abuts the part of the window part 8 by the front seat protection part 42 and the rear seat protection part 43 which are extended covering the window part 8, and is exclusive. Since the pillar covering portion 44 that covers the center pillar 12 is provided as a structure, the airbag 1 can be surely attached to the occupant that is in contact with the center pillar 12 portion of the vehicle body 3 that is inflated to the vehicle interior side than the window portion 8. It can be restrained and protected without a feeling of bottoming.

  In addition, on the downstream side of the communication part 75 where the pillar covering part 44 communicates with the lower inflating part 45, the gas regulating part 47 hermetically closes the lower inflating part 45, so that the occupant abuts on the part of the center pillar 12 In this case, the gas is prevented from moving to the downstream side, the pillar covering portion 44 and the portion of the lower inflating portion 45 that is in the vicinity of the pillar covering portion 44 are inflated and deployed, and the occupant is received with sufficient reaction force. And can be protected without a feeling of bottoming.

  Further, the pillar covering portion 44 expands in an axial shape with the up-down direction as an axial direction, and the lower inflating portion 45 continuous to the lower end portion of the pillar covering portion 44 is formed in an axial shape with the front-rear direction being the longitudinal axial direction. Further, the gas guide portion 41 continuing to the upper end portion of the pillar covering portion 44 expands in a shaft shape with the front-rear direction being the axial direction which is the longitudinal direction. Therefore, a substantially T-shaped bulging structure constituted by the pillar covering portion 44 and the lower inflating portion 45, and further, a substantially H shape constituted by the pillar covering portion 44, the lower inflating portion 45 and the gas guiding portion 41. Due to the shape of the bulging structure, the deployed shape of the airbag body 31 of the airbag 1 including the front seat protection part 42 and the rear seat protection part 43 can be firmly held. Furthermore, since the lower inflating portion 45 is provided at a position covering the center pillar 12, the lower inflating portion 45 abuts on the center pillar 12 when the vehicle rolls over, and the deployed position can be firmly held. Therefore, even when the occupant comes into contact with the airbag 1 when the vehicle rolls over, it is possible to prevent the occupant from being released from the vehicle by preventing a gap from being formed between the airbag 1 and the window portion 8.

  Further, the connecting line portion 71 that is a connecting portion that defines and forms the pillar covering portion 44 is provided with an intersecting portion 73 that is continuous with the lower end portion of the linear portion 72 and is curved so as to partially overlap the center pillar 12. Therefore, even when the occupant comes into contact with the airbag 1, the airbag 1 is prevented from being deformed so as to bend along the straight portion 72, thereby preventing the generation of a gap and effectively releasing the occupant from the vehicle. Can be prevented.

  In FIG. 1, A is a head of the front seat occupant schematically illustrated, and B is a head of the rear seat occupant schematically illustrated, which is not a normal seating position. And it was confirmed in an experiment in which the airbag 1 inflated and deployed at the positions indicated by A and B was pushed to effectively prevent the passenger from being released from the vehicle.

  Thus, according to the curtain airbag device of the present embodiment, the pillar covering portion 44 and the gas regulating portion 47 are provided, so that the vehicle body 3, particularly the center pillar 12 portion, is provided when the airbag 1 is deployed. Can prevent the feeling of bottoming out. In addition, since the portion that bulges by the pillar covering portion 44 and the lower inflating portion 45 has a T shape, the position and shape of the airbag 1 that is deployed during rollover (during rollover) are firmly held, and the occupant Can be prevented from being released outside the vehicle.

  Further, since the lower inflating part 45 is provided with a gas regulating part 47 located in the vicinity of the front of the center pillar 12, that is, on the downstream side of the gas, when the occupant comes into contact with the pillar covering part 44, the pressing force of the occupant This prevents the gas in the pillar covering portion 44 from moving further to the front inflating portion 35 via the lower inflating portion 45, and gas is supplied to the pillar covering portion 44 and the portion of the lower inflating portion 45 adjacent to the pillar covering portion 44. Can be maintained, and passenger protection performance can be improved.

  Further, the connecting line portion 71 constituting the pillar covering portion 44 is not provided entirely along the edge of the center pillar 12, but has a substantially J shape with a curved tip, and the edge of the center pillar 12 is formed. Since the pillar covering portion 44 does not bend along the center pillar 12, the gap between the airbag 1 and the window frame of the window portion 8 is prevented from being generated. Release can be reliably prevented.

  Further, the restraining performance in the vicinity of the center pillar 12 can be easily adjusted by adjusting the position of the connecting line portion 71 and the like. For example, the connecting line portion 71 is moved back and forth, and the front side, that is, the downstream dimension L1 of the connecting line portion 71 and the rear side, that is, the upstream side dimension L2 of the connecting line portion 71 are adjusted as shown in FIG. Thus, the developed shape of the C part on the front side of the connecting line part 71 and the developed shape of the D part on the rear side of the connecting line part 71 can be adjusted, or the gas flowing into the D part on the rear side of the connecting line part 71 With respect to the flow, the balance between the gas G1 flowing from the gas guide portion 41 and the gas G2 flowing from the lower expansion portion 45 can be adjusted, and the development characteristics can be adjusted.

  Further, for example, as shown in FIG. 4, the connecting line portion 71 forms a straight portion 72 substantially along the center line in the width direction of the center pillar 12, that is, the pillar covering portion 44, and the lower end portion of the straight portion 72. It is also possible to form a curved intersection 73 that is continuously curved to the upstream side that is the rear side of the vehicle and extends to a position overlapping the edge of the center pillar 12.

  In addition, in this way, with a simple configuration, it is possible to achieve both improvement in the restraining characteristics of the center pillar 12 portion and securing of the release prevention performance outside the vehicle, and a separate structure that regulates the deployment position and deployment shape of the airbag 1. There is no need to provide this, and it is not necessary to increase the capacity of the inflator 25, so that the manufacturing cost can be reduced.

  In the above embodiment, the gas regulating unit 47 is configured to completely block the gas flow. However, the present invention is not limited to this, and the gas regulating unit 47 may be allowed to pass with an appropriate resistance. Alternatively, the gas regulating unit 47 can be omitted and not provided.

  Further, the inflating portion 35, the gas introducing portion 36, and the non-inflating portion 37 of the airbag 1 can be appropriately arranged. For example, the gas introducing portion 36 is located at the center in the front-rear direction of the airbag main body portion 31. It can also be located at the top. Further, the gas guide part 41 can be formed only at a position where the front seat protection part 42 and the rear seat protection part 43 communicate with each other in addition to being formed over the entire length of the airbag main body part 31. Further, the lower inflating portion 45 can be formed in the entire length of the airbag main body portion 31, or can be formed in only a part as long as it communicates with at least the pillar covering portion 44.

  Further, the airbag 1 is not limited to a configuration in which the airbag 1 is deployed from the upper side to the lower side and covers the window portion 8 on the side of the automobile, and the airbag 1 needs to be inflated and deployed in a planar shape along a predetermined surface having a pillar. It can be applied to the airbag apparatus.

  The present invention can be applied to, for example, an airbag and an airbag device called a curtain airbag that are deployed along a side window of an automobile.

It is explanatory drawing of the state arrange | positioned in the vehicle which shows one Embodiment of the airbag of this invention, and an airbag apparatus. It is explanatory drawing of the state expanded to the planar shape of an airbag same as the above. It is explanatory drawing which expanded a part of the state arrange | positioned in the vehicle of an airbag same as the above. It is explanatory drawing which expanded a part of the state arrange | positioned in the vehicle which shows other embodiment of the airbag of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air bag 2 Air bag apparatus 5 Roof side part as a storing position 8 Window part as opening part
12 Center pillar as columnar part
14 Predetermined surface
25 inflator
33, 34 base fabric
36 Gas introduction part
41 Gas guide
42 Front seat protection part as opening part
43 Rear seat protection part as opening part
44 Pillar covering part as a development part for columnar part
45 Lower expansion part as downstream development part
47 Gas Regulatory Department
71 Connecting line
72 Straight section
73 Intersection
75 Communication part

Claims (5)

An airbag that develops along a predetermined surface having an opening that can be opened and a columnar portion adjacent to the opening,
An opening expanding portion that covers and expands the opening;
A columnar portion expanding portion that covers the columnar portion and expands into a columnar shape;
Connected to the opening part for the opening part and the development part for the columnar part, communicates at least with the downstream side of the development part for the columnar part, and develops in a columnar shape in a direction intersecting the development part for the columnar part. An air bag characterized by comprising: Opposing base fabric parts constituting the outer shell of the columnar part development part,
The base cloth portions having a straight portion along the gas flow direction of the development portion for the columnar portion and a crossing portion that is curved in a direction intersecting with the straight portion and intersects a part of the development portion for the columnar portion. The airbag according to claim 1, further comprising: a connecting line portion that connects the two. The airbag according to claim 1 or 2, wherein the downstream side deployment portion is provided with a gas regulating portion that is located downstream of the communicating portion that communicates with the columnar portion deployment portion and regulates the flow of gas. . The airbag according to claim 3, wherein the gas regulating unit blocks a gas flow. An air bag according to any one of claims 1 to 4, comprising a gas introduction part into which gas is introduced and a gas guide part communicating with the gas introduction part,
An inflator for supplying gas to the gas introduction part of the airbag,
The predetermined surface is a surface portion along the center pillar that is a window portion and a columnar portion that is an opening that can be opened in a vehicle cabin,
The airbag is folded and stored at a storage position along the upper edge of the predetermined surface,
The gas guide part extends along the upper edge of the window part,
The downstream development part develops along the lower edge part of the window part,
The columnar portion deployment portion is deployed in a direction substantially orthogonal to the gas guide portion and the downstream deployment portion.

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