JP2016107882A - Airbag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an airbag which can make an airbag main body part effectively intrude into a clearance between a head of an occupant and a widow part, and can secure protection performance.SOLUTION: An airbag main body part 33 comprises a second expansion part 55 which expands at a position opposing a center pillar 22. The airbag main body part 33 comprises a third expansion part 56 which expands at a position opposing a widow part 18. The airbag main body part 33 comprises a third partition joining part 63 which partitions the expansion parts 55, 56 by joining base fabrics, and regulates an expansion amount of an upper part 56a of the third expansion part 56 into a cabin to a value smaller than that of a lower part 56b. The vicinity of the third partition joining part 63 is regulated in the expansion of the airbag main body part 33, and can effectively intrude into a clearance between a head of an occupant and the window part from a folded state. In the third expansion part 56, the lower part 56b whose expansion amount into the cabin is relatively large abuts on the center pillar 22 in an initial stage, tension is thus generated, and protection performance can be secured.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an airbag including an airbag main body that is deployed along a predetermined surface in a vehicle compartment including a pillar portion and a window portion.

  2. Description of the Related Art Conventionally, an airbag device having an airbag that is inflated and deployed by introducing gas, a so-called curtain that deploys the airbag along a predetermined surface including a pillar portion of a side portion of a vehicle compartment and a window portion of a door. Airbag devices are known. The airbag of such an airbag device is normally folded long and is arranged along the roof side portion of the upper edge portion of the window portion. When an impact such as a side collision or rollover occurs, gas is supplied from the inflator and the airbag is inflated and deployed downward along the side window glass to restrain the occupant. Protect your head.

  In such an airbag device, for example, even in a so-called head-on-glass state (HOG state) in which the head of the occupant is in contact with the glass of the window, the airbag is inserted between the occupant's head and the glass. It is required to expand the cell. Therefore, for example, a configuration corresponding to the HOG state is known by providing a deployment guide cloth on the inner side of the airbag and deploying the deployment guide cloth so as to enter between the head of the occupant and the glass. (For example, refer to Patent Document 1).

JP 2000-62562 A (page 4-7, Fig. 1-3)

  However, in the case of the above-mentioned structure, depending on the size of the glass of the window part, it may be necessary to set a large deployment guide cloth. Therefore, it is desired to further reduce the cost and weight while improving the degree of freedom of layout while supporting the HOG state.

  On the other hand, it is also required to satisfy the occupant emission reduction performance as defined in, for example, US Law (FMVSS) 226. In this case, a sufficient amount of inflation is required for the airbag at a position facing the pillar portion such as the center pillar and the rear pillar, and it is not easy to satisfy the performance corresponding to the above HOG state.

  The present invention has been made in view of the above points, and provides an airbag that can effectively insert an airbag main body portion between an occupant's head and a window portion and can ensure protection performance. The purpose is to do.

  The airbag according to claim 1 is formed in a bag shape by a base cloth, and is supplied with gas from a folded state, and extends in a vertical direction in the passenger compartment, and a window positioned in front of the pillar portion An airbag including an airbag main body that expands downward along a predetermined surface including a portion, wherein the airbag main body is inflated to a position opposite to the pillar, A window portion expansion portion that expands to a position facing the window portion; and the base cloth is joined to partition between the pillar portion expansion portion and the window expansion portion; and the pillar portion expansion portion. And a partition portion for restricting the amount of expansion toward the interior of the vehicle compartment to be smaller than that of the lower portion.

  The airbag according to claim 2 is the airbag according to claim 1, wherein the partition section partitions a lower part of the pillar part inflating part and a lower part of the window part inflating part and extends along the vertical direction. And a protruding portion that continues to the upper portion of the partition portion main body and protrudes rearward at the position of the upper portion of the expansion portion for the pillar portion, continues to the protruding portion, and is folded back from the protruding portion to the front. And a folded portion positioned on the upper portion of the window expansion portion.

  According to a third aspect of the present invention, in the airbag according to the second aspect, the airbag includes a gas introduction portion that is provided at an upper portion of the airbag main body portion and introduces gas into the airbag main body portion. A stacking portion in which the lower region below the protruding portion and the folded portion is wound outwardly of the passenger compartment in the folded state, and the protruding portion and the folded portion so that the protruding portion and the folded portion are outward of the passenger compartment. The upper region including the portion includes an overlapping portion superimposed on the accumulation portion.

  According to the airbag of the first aspect, since the expansion of the airbag main body is restricted in the vicinity of the partition portion where the base fabric is joined, it is effective between the occupant's head and the window from the folded state. In addition, the expansion portion for the pillar portion of the expansion portion for the pillar portion is more restricted in the amount of expansion toward the vehicle interior than the lower portion. It is in contact with the part and has a tension, so that the protection performance can be secured.

  According to the airbag of the second aspect, in addition to the effect of the airbag of the first aspect, the partition part is continuous with the upper part of the partition part main body and is moved backward at the position of the upper part of the inflating part for the pillar part. An upper portion of the inflating portion for the pillar portion is provided with a projecting portion that protrudes, and a folded portion that is continuous with the projecting portion and is folded forward from the projecting portion and positioned on the upper portion of the inflating portion for the window portion. The partition part which regulates the amount of expansion toward the vehicle interior to be smaller than the lower part can be easily configured.

  According to the airbag of the third aspect, in addition to the effect of the airbag of the second aspect, the vicinity of the protruding portion and the folded portion can be deployed along the window portion. The airbag main body can be more effectively inserted between the two.

It is a side view which shows the expansion | deployment state of 1st Embodiment of the airbag of this invention from the compartment side. It is sectional drawing in the II equivalent position of an airbag same as the above. It is sectional drawing of the accommodation state in the II equivalent position of an airbag same as the above. A part of expansion | deployment operation | movement of the airbag main-body part of an airbag same as the above is shown typically, (a) is a front view, (b) is a top view. It is a side view which shows the deployment state of 2nd Embodiment of the airbag of this invention from the vehicle interior side. It is a top view which shows typically a part of deployment operation | movement of the airbag main-body part of an airbag same as the above.

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

  1 to 4, reference numeral 10 denotes an airbag, and an airbag device 11 including the airbag 10 is also called a curtain airbag device, and is used as a storage position of a compartment 14 of a vehicle body of a vehicle that is a vehicle. Arranged on the roof side 15. The airbag 10 is also called a curtain airbag, a side-impact airbag, an inflatable curtain, or a head protection airbag. The airbag 10 is subjected to a side impact or rollover. For example, the head H of the occupant A and the like are protected by being developed in a plane substantially downward in a predetermined direction on the side of the occupant as the object to be protected.

  In the following description, the front-rear direction, the vehicle width direction, the both-side direction, the up-down direction, and the like are based on the straight direction of the vehicle, and the front direction (arrow F direction), rear direction (arrow R direction), and upward (arrow U direction), the lower side (arrow D direction), the outside of the vehicle compartment 14 (arrow W direction), the inside of the vehicle compartment 14 (arrow C direction), and the like will be described.

  The vehicle body includes a front seat and a rear seat in which passengers can sit in the passenger compartment 14 and is covered with glass 18a and 19a that can be opened at the top corresponding to the front seat and the rear seat, respectively. A door (not shown) provided with (first and second) window portions (side windows) 18 and 19 is provided. Further, on both sides of the passenger compartment 14, in order from the front side, a front pillar 21 as a (first) columnar body also called a A pillar, and a (first) pillar as a (second) columnar body also called a B pillar. The center pillar 22 that is a part and the rear pillar 23 that is a (second) pillar part called a (third) columnar body, also called a C pillar, are provided behind the front pillar 21 and in front of the center pillar 22 The window 18 (glass 18a) is located, and the window 19 (glass 18a) is located behind the center pillar 22 and in front of the rear pillar 23. The windows 18 and 19 (glasses 18a and 19a), the doors, and the pillars 21, 22, and 23 form predetermined surfaces 24 on both sides of the passenger compartment 14. In addition, a vehicle body panel 25 that constitutes a member to be attached, which is also called a roof side rail, is provided on the upper side of the pillars 21, 22, and 23, that is, the upper edge portion that is one edge portion of the window portions 18 and 19. A ceiling panel as a ceiling portion is supported via the panel 25. A front glass (front windshield) is provided on the front side of the front pillars 21 on both sides, and a rear glass is provided on the rear side of the rear pillars 23 on both sides. And the roof side part 15 as a storage position is set from the edge part on both sides of the ceiling panel to the part covering almost the entire length of the front pillar 21 and the rear pillar 23 extending in a direction intersecting with this edge part. A predetermined surface 24 on which the airbag 10 is deployed is set inside an arc virtually formed by the edge portion of the ceiling panel and the front pillar 21 and the rear pillar 23.

  Here, the center pillar 22 indicates not a pillar portion at the front and rear ends but a pillar portion covered with the deployed airbag 10. Depending on the type of vehicle, for example, four or more pillar portions may be provided on one side, but the third and subsequent pillar portions from the front will be described as the rear pillar 23.

  The airbag device 11 is a so-called front and rear seat airbag that can protect passengers in the front and rear seats, and serves as an interior material that continues from the upper end of the vehicle body panel 25 and the pillars 21, 22, and 23 to the ceiling. The roof side 15 surrounded by the head lining 26 that is a ceiling covering member, that is, the airbag 10 that is folded and stored along the upper edge of the door opening of the vehicle body, and stored behind or above the rear seat. An inflator 27 that is a gas generator for supplying gas to the airbag 10 is provided. The airbag device 11 includes a bracket (not shown) formed by pressing a metal plate for attaching the airbag 10 to the vehicle body panel, and a breakable cylinder or string that holds the shape of the folded airbag 10. And a tether belt 29 as a tether portion connected to the front end portion of the airbag 10. Further, the interior side of each passenger compartment 14 of each pillar 21, 22, 23 is covered by a pillar garnish 30 which is a cover body as a structure, that is, a covering interior material.

  The airbag 10 includes a gas introduction part 32 as an inflator connection part into which an inflator 27 is inserted and connected to introduce gas, and an airbag main body part 33 formed in a flat bag shape, and includes a plurality of attachment parts. A plurality of upper edge portions are attached to the vehicle body via 34, and are stored in a longitudinal shape along the front-rear direction in the roof side portion 15 above the center pillar 22 in a state of being elongated and folded. In the present embodiment, the airbag 10 is of a so-called center mount type, and the gas introduction part 32 is provided at the center of the upper part of the airbag main body part 33 in the front-rear direction, for example. In the present embodiment, the reinforcing member 36 is disposed inside the airbag 10.

  The gas introduction part 32 and the airbag main body part 33 may be one or a plurality, for example, a first base cloth 41 that is a base cloth located on the indoor side of the vehicle compartment 14 in the present embodiment, and the outdoor side of the vehicle compartment 14. And a second base cloth 42 which is a base cloth located on a certain vehicle body side. And the 1st and 2nd base fabrics 41 and 42 are joined to the airbag 10 with the gas introduction part 32 and the airbag main-body part 33 by joining the outer edge part by the airbag joining part 45 which is a main division line. Is set. The airbag joint portion 45 is continuous over the front end portion, the lower end portion and the rear end portion of the first and second base fabrics 41 and 42 along the longitudinal direction of the airbag main body portion 33, and from the upper end portion. The gas introduction part 32 is continuous over both front and rear ends. For this reason, the rear end portion (upper end portion) of the gas introduction portion 32 is an insertion opening 43 into which the inflator 27 is inserted.

  The reinforcing member 36 reinforces the gas introduction part 32 against the pressure of the gas and distributes the gas to the front and rear in the airbag main body part 33. The first and second base cloths 41 are provided. , 42 and is integrally fixed to the first and second base fabrics 41, 42. The reinforcing member 36 is formed by folding one or a plurality of reinforcing base fabrics 47 so as to be overlapped in a cylindrical shape and joined by the reinforcing member joining portion 48, so that the reinforcing member 36 is vertically moved along the inside of the gas introduction portion 32. A cylindrical projecting reinforcing portion 36a located at the bottom, and a tubular vent portion 36b that communicates with the lower end portion of the projecting reinforcing portion 36a and branches and extends in the front-rear direction in the airbag main body 33. Is done. The reinforcing member 36 is not shown in FIG. 2 for the sake of clarity.

  Each of the joint portions 45 and 48 is configured to be substantially airtight or highly airtight, for example, by sewing, bonding, or a combination of sewing and sealing means.

  The airbag main body portion 33 is configured by overlapping the first and second base fabrics 41 and 42 and joining them at the airbag joining portion 45, and is formed so as to be inflated and deployed by the inflowing gas. The airbag main body portion 33 is an air chamber that is a hollow portion, and is divided into a plurality of inflatable portions (cells) 52 by a main body joint portion 51 that is a plurality of dividing division lines. The inflatable portion 52 of the airbag main body 33 communicates directly with the gas introducing portion 32 via the reinforcing member 36, and the gas supplied from the inflator 27 is introduced into the gas via the vent portion 36b of the reinforcing member 36. It is supplied directly from the section 32.

  Here, in the present embodiment, first to fifth inflating portions 54, 55, 56, 57, and 58 are set in the inflating portion 52.

  The first inflatable portion 54 is located at the front end of the airbag body 33 and is located at the front side of the front seat, that is, at the position facing the front pillar 21 and the compartment 14 side of the window 18 (glass 18a). It is a front end inflating part that inflates and expands, and is formed in a longitudinal shape in the vertical direction. The upper part of the first inflating part 54 is inclined forward and downward.

  The second inflating portion 55 is located adjacent to the rear portion of the first inflating portion 54 and is located on the rear side of the front seat, that is, in front of the center pillar 22, in the casing of the window portion 18 (glass 18 a). This is a (first) inflating portion for a window portion that inflates and deploys at a position facing the 14 side, and is a portion facing the head H of the passenger A in the front seat. The second inflating portion 55 has an upper portion 55a in direct communication with the front end portion of the ventilation portion 36b of the reinforcing member 36. Further, the second inflating portion 55 is formed such that the front side portion protrudes downward with respect to the rear side portion, and the lower end portion of the front side portion is substantially equal to the lower end portion of the first inflating portion 54. Is in position. Accordingly, the lower portion 55b of the second inflating portion 55 is formed such that the lower end portion is stepped downward from the rear side portion to the front side portion.

  The third inflating part 56 is located adjacent to the rear part of the second inflating part 55 and inflated to the side between the front seat and the rear seat, that is, the position facing the compartment 14 side of the center pillar 22. This is a (first) expansion portion for a pillar portion, which is formed in a longitudinal shape along the vertical direction, and the upper portion 56a is located opposite to the lower end portion of the gas introduction portion 32. That is, a part of the reinforcing member 36, in this embodiment, a portion where the protruding reinforcing portion 36a and the ventilation portion 36b of the reinforcing member 36 are continuous, that is, the lower end portion of the protruding reinforcing portion 36a is located on the upper portion 56a. ing. Further, the third expansion portion 56 is inclined toward the front lower side from the upper portion 56a to the lower portion 56b corresponding to the shape of the center pillar 22.

  The fourth inflating portion 57 is located adjacent to the rear portion of the third inflating portion 56, and is located on the side of the front side of the rear seat, that is, behind the center pillar 22, in the casing 14 of the window portion 19 (glass 19a). It is an inflating part that inflates and deploys at a position facing the side, and is formed in a longitudinal shape along the front-rear direction at the position of the lower end part of the airbag body part 33. In addition, a communication passage 59 that communicates the third expansion portion 56 and the fifth expansion portion 58 is formed in the upper part of the fourth expansion portion 57 along the front-rear direction. The communication path 59 is in direct communication with the rear part of the ventilation part 36 b of the reinforcing member 36, that is, the upper part 56 a of the third expansion part 56.

  The fifth inflating portion 58 is a rear end inflating portion that inflates and expands to the side of the rear side of the rear seat, that is, the window portion 19 (glass 19a) and the rear pillar 23 facing the compartment 14 side. Is formed in a longitudinal shape. The fifth inflating part 58 has an upper part 58 a communicating with the communication path 59 and a lower part 58 b adjacent to the rear part of the fourth inflating part 57.

  The main body joint portion 51 is configured by joining the first and second base fabrics 41 and 42 in the vehicle width direction. In the present embodiment, the main body joint portion 51 is provided with first to fourth partition joint portions 61, 62, 63, 64 from the front side to the rear side. The main body joint portion 51 is configured to be substantially airtight or highly airtight, for example, by sewing, bonding, or a combination of sewing and sealing means.

  The first partition joint portion 61 partitions the first inflatable portion 54 and the second inflatable portion 55 forward and backward, and a window portion 18 (glass 18a) that is a position closer to the front side of the airbag joint portion 45. The lower end on the front end side is spaced upward with respect to the lower end portion of the airbag joining portion 45. ing. Accordingly, a communication port 66 that communicates the first inflatable portion 54 and the second inflatable portion 55 is formed between the front end (lower end) of the first partition joint portion 61 and the airbag joint portion 45. Has been. Further, the first partition joint portion 61 is located in front of the ventilation portion 36b of the reinforcing member 36.

  The second partition joint section 62 controls the gas flow by partitioning the inside of the second inflatable section 55 back and forth, and is behind the first partition joint section 61 and the airbag joint section 45. From the lower end of the position facing the window 18 (glass 18a), which is a position closer to the front side, is formed to extend in a short shape toward the upper side.

  The third partition joint portion 63 is a (first) partition portion that divides the second expansion portion 55 and the third expansion portion 56 in the front-rear direction, and behind the second partition joint portion 62. And, from the lower end of the position facing the window 18 (glass 18a) which is a position near the front end of the airbag joint 45, it extends in a straight longitudinal direction along the vertical direction toward the upper rear side (first ) A straight portion 63a that is a partition body, a (first) protrusion 63b that is continuous with the upper end of the straight portion 63a, and a (first) folded portion 63c that is continuous with the protrusion 63b. Yes. The projecting portion 63b extends from the upper end portion of the linear portion 63a toward the rear upper side, that is, toward the lower end portion of the gas introduction portion 32, to a position below the ventilation portion 36b of the reinforcing member 36. Further, the folded portion 63c is curved and folded in a circular arc shape forward with respect to the protruding portion 63b, and is positioned along the lower portion of the reinforcing member 36. Therefore, a communication port 67 that communicates the second inflatable portion 55 and the third inflatable portion 56 is formed between the folded-back portion 63c and the airbag joining portion 45. The third partition joint 63 suppresses the amount of expansion of the upper part 55a of the second inflating part 55 and the upper part 56a of the third inflating part 56 toward the vehicle compartment 14 side. Accordingly, the second and third inflating portions 55 and 56 are inflated in the interior of the vehicle compartment 14 in the upper portions 55a and 56a by the third partition joint portion 63. It is set to be smaller than the expansion amount.

  These first to third partition joint portions 61, 62, and 63 are positions behind the front pillar 21 and in front of the center pillar 22, that is, the vehicle compartment 14 side of the window 18 (glass 18a). It is arrange | positioned in the position facing.

  The fourth partition joint portion 64 partitions the third expansion portion 56 and the fourth expansion portion 57 and partitions the fourth expansion portion 57, the fifth expansion portion 58, and the communication path 59. From the lower end of the position facing the window 19 (glass 19a), which is closer to the rear end of the airbag joint 45, the first longitudinally extending in the vertical direction toward the upper front side. A base end portion 64a that divides the fourth inflatable portion 57 and the fifth inflatable portion 58 in the front-rear direction, and extends in a linear longitudinal shape that is continuous with the upper end portion of the base end portion 64a and is inclined toward the upper front side. 59 and a fourth inflating portion 57, an intermediate portion 64b that vertically divides, and a third inflating portion 56 that extends in a straight longitudinal direction that is continuous with the front end portion of the intermediate portion 64b and is inclined toward the front lower side. And a distal end portion 64c that divides the fourth expansion portion 57 in the front-rear direction. The distal end (lower end) of the distal end portion 64c is positioned so as to be spaced above the lower end portion of the airbag joining portion 45. For this reason, a communication port 68 is formed at the lower end of the distal end portion 64c between the airbag connecting portion 45 and the third inflating portion 56 and the fourth inflating portion 57. The intermediate portion 64b is located above the protruding portion 63b of the third partition joint portion 63 and below the folded portion 63c. In other words, the upper side of the protruding portion 63b of the third partition joint portion 63 and the folded portion 63c are located above the fourth partition joint portion 64.

  The attachment portion 34 is, for example, an attachment piece for attaching the vehicle body, and a plurality of attachment portions 34 are formed at predetermined positions on the upper edge portion of the airbag main body portion 33. The attachment portion 34 is integrally formed with the first and second base fabrics 41 and 42 constituting the airbag main body portion 33. For example, the first and second base fabrics 41 and 42 are overlapped and sewn. Is formed.

  The head lining 26 is formed of, for example, a synthetic resin having a skin body, and is disposed from substantially the entire length of the front pillar 21 and the rear pillar 23 of the roof side portion 15 to the ceiling portion, and includes the folded airbag 10. The interior side of the compartment 14 of the bag device 11 is covered. A lower end portion of the head lining 26 is engaged with the pillar garnish 30. Then, the head lining 26 is separated from the upper end of the pillar garnish 30 by being deformed so that the lower end portion is bent at the roof side portion 15 when the airbag 10 is deployed, and the airbag 10 is moved into the passenger compartment 14. Inflatable deployment is possible.

  The inflator 27 is formed in an elongated cylindrical shape. This inflator 27 has a built-in gas generating means such as a combustion type (pyro technique type) that burns chemicals, a storage type that stores gas at high pressure (storage type), or a hybrid type that combines these combustion types and storage types. Has been. The inflator 27 is provided with a gas injection part 71 for injecting gas at one end in the longitudinal direction. The gas injection part 71 is inserted into the gas introduction part 32 from the insertion opening 43 of the airbag 10, that is, from the rear. And it is inserted and fixed. Further, the other end portion of the inflator 27 is provided with a connector portion (not shown) to which an electric wire called a harness is connected. This connector portion is located outside the gas introduction portion 32 in a state where the inflator 27 is inserted into the gas introduction portion 32. The inflator 27 is electrically connected to a control device (not shown) via this connector portion, and the operation of the inflator 27 is controlled by an electric signal from the control device.

  The tether belt 29 is for connecting the airbag 10 to the vehicle compartment 14 at the position of the front pillar 21, for example, and is also called a hanging string, a tether, or a strap. For example, in the present embodiment, the tether belt 29 is positioned in front of the first inflatable portion 54 on the lower side of the front portion of the airbag 10 (the airbag main body portion 33).

  The pillar garnish 30 forms a part of the predetermined surface 24, and is formed in a longitudinal shape along the vertical direction by, for example, a synthetic resin having a skin, and is provided in the compartment 14 of each pillar 21, 22, 23. It is arranged so as to cover the inner side, and covers the tether belt 29 at the position of the front pillar 21.

  The sleeve keeps the shape of the airbag 10 folded into a predetermined shape to prevent collapse, and a tubular member provided with a breakable slit, a breakable adhesive tape, or the like is used.

  Next, the folding process and folding shape of the airbag 10 will be described.

  In the present embodiment, the airbag 10 first inserts one end side of the inflator 27, that is, the gas injection part 71 side, into the insertion opening 43 of the gas introduction part 32 from a state where the airbag main body part 33 is flattened. Then, the inflator 27 is integrally fixed in a state of being exposed from the airbag 10 to the outside.

  The airbag body 33 is moved from the lower end of the first to fifth inflated portions 54, 55, 56, 57, 58 from the lower side of the vehicle body, that is, to the predetermined surface 24 side (second base fabric 42 side). 3 is rolled up to an extent including the straight line portion 63a of the partition joint portion 63, folded into a so-called outer roll shape to form the accumulation portion 73, and the upper portions 55a, 56a of the second and third inflating portions 55, 56 and the communication path A guide portion 74 as an overlapping portion folded in a parasol shape is overlapped so that 59 is overlapped in a zigzag manner on both sides in the upper portion of the stacking portion 73. That is, the stacking portion 73 includes a lower portion of the first inflating portion 54, a lower portion 55b of the second inflating portion 55, a third portion located below the protruding portion 63b and the folded portion 63c of the third partition joint portion 63. A lower portion 56b of the inflatable portion 56, a fourth inflatable portion 57, and a lower portion 58b of the fifth inflatable portion 58 (lower region B1 of the airbag main body portion 33) are disposed. The upper part of the first inflating part 54, the upper part 55a of the second inflating part 55, the upper part 56a of the third inflating part 56, the communication path 59 and the fifth part located above the protruding part 63b and the folded part 63c of the joint part 63. The upper portion 58a of the inflatable portion 58 (the upper region B2 of the airbag main body portion 33) is disposed. In particular, the protruding portion 63b and the turned-up portion 63c of the third partition joint portion 63 are arranged at the lower end position P (FIG. 3) on the vehicle exterior side that is continuous with the accumulation portion 73 in the guide portion 74. As a result, the airbag 10 is folded into a predetermined elongated shape. Thereafter, the folded shape is held using a sleeve or the like so that the coupling 10 can be released or broken by the pressure when the airbag 10 is deployed. In this manner, the airbag 10 is folded into an elongated shape and the folded shape is maintained, and the airbag apparatus 11 serving as a curtain airbag module is configured.

  Then, the airbag device 11 including the airbag 10 folded as described above is brought into the vehicle compartment 14, and the attachment work to the vehicle body is performed before the interior materials such as the head lining 26 and the pillar garnish 30 are attached. This attaching operation is performed by attaching and fixing the plurality of attaching portions 34 and the tether belt 29 of the airbag 10 to the vehicle body using a fixing tool such as a bolt (not shown). At this time, the inflator 27 is fixed at a position corresponding to the center pillar 22. Further, the harness derived from the inflator 27 is connected to a control device provided in the vehicle body. Next, the headlining 26 is attached to the ceiling panel of the vehicle body to cover the airbag device 11, and the pillar garnish 30 is attached to each of the pillars 21, 22, and 23 to complete the operation of attaching the airbag device 11 to the vehicle body. . In this attached state, the airbag device 11 is isolated from the interior of the passenger compartment 14 by the head lining 26 and the pillar garnish 30, and the inflator 27 inserted into the gas introduction part 32 and the airbag body part folded in a roll shape 33 is held at a position above the pillar garnish 30.

  Next, a deployment operation of the airbag 10 will be described.

  In the event of a side collision or rollover of the vehicle, the inflator 27 is actuated by the control device, and the gas injected from the gas injection part 71 of the inflator 27 inflates the gas introduction part 32, and then the airbag body part 33 The air bag body 33 is introduced into the inside, and is inflated and deployed in a planar shape downward along the predetermined surface 24 on the side of the vehicle compartment 14 to protect the occupant A.

  More specifically, when gas is supplied to the airbag 10 at the gas introduction part 32, the gas is introduced from the gas introduction part 32 by the expansion of a part of the guide part 74 of the airbag main body part 33. The accumulated portion 73 is deformed so as to push the lower end portion of the head lining 26 toward the interior side of the passenger compartment 14, and protrudes into the passenger compartment 14 from an opening 76 formed away from the upper end portion of the pillar garnish 30. .

  The airbag main body 33 protruding into the passenger compartment 14 has a guide portion 74 that guides the accumulating portion 73 to the outside of the vehicle, while the guide portion 74 has the first and second base fabrics 41 and 42 mutually connected. The positions of the projecting portion 63b and the folded portion 63c of the third partition joint portion 63 that are joined do not expand, and the second and the second portions that are positioned before and after the projecting portion 63b and the folded portion 63c of the third partition joint portion 63 are not expanded. The upper portions 55a and 56a of the third expansion portions 55 and 56 expand. Therefore, for example, when the head H of the passenger A in the front seat is in a so-called head-on-glass state (hereinafter referred to as the HOG state) in contact with the glass 18a of the window 18, the front located near the front of the center pillar 22 Since the inflation of the airbag main body 33 is restricted in the vicinity of the position of the protrusion 63b and the turn-up portion 63c of the third partition joint 63 that faces the position of the head H of the passenger A in the seat, The outer end of the vehicle enters the head A of the occupant A and the glass 18a of the window 18 (FIGS. 4 (a) and 4 (b)), and the accumulation portion 73 is inflated and expanded by gas. To do. As a result, the deployment behavior of the airbag main body 33 is stabilized, and the head H of the occupant A is protected by the second inflating portion 55 deployed between the head H of the occupant A in the HOG state and the glass 18a. . Further, in the third inflating portion 56, the lower 56b has a relatively larger amount of expansion toward the vehicle compartment 14 than the upper portion 56a. Contacting at an early stage (FIG. 2) provides tension, firmly supports the occupant A, can ensure the protection performance, and in particular, can realize the off-vehicle emission reduction performance defined in US Law (FMVSS) 226. Therefore, compatibility with the HOG state and the protection performance of the passenger A can be achieved. In addition, about the passenger | crew of a backseat, a head etc. are protected by the 4th expansion part 57 and the 5th expansion part 58 which were expand | deployed facing the glass 19a of the window part 19. FIG.

  In particular, the third partition joint 63 includes a protrusion 63b that continues to the upper part of the straight part 63a and protrudes rearward at the position of the upper part 56a of the third expansion part 56. Since the folded portion 63c is continuously folded back from the projecting portion 63b and positioned at the upper portion 55a of the second inflating portion 55, the inside of the upper portion 56a of the third inflating portion 56 is inward of the vehicle compartment 14. It is possible to easily configure the third partition joint portion 63 that restricts the amount of expansion of the lower than the lower portion.

  And, since the passenger protection performance can be satisfied only by tuning the inflation amount of the airbag main body 33 in this way, the increase in the inflation amount of the airbag main body 33, the hooking of the airbag main body 33 on the door trim, or the airbag It is not necessary to take measures such as tension at the pillars 21, 22, and 23 of the main body 33 and an increase in internal pressure.

  In addition, a gas introduction part 32 is provided on the upper part of the airbag main body 33, and the airbag main body 33 is in a folded state so that the lower region B1 below the protruding part 63b and the folded part 63c is located outside the vehicle compartment 14, that is, The stacking portion 73 is formed by rolling up the outside of the vehicle, and the upper region B2 including the protruding portion 63b and the folded portion 63c is overlapped on the collecting portion 73 so that the protruding portion 63b and the folded portion 63c are outside the vehicle compartment 14. Since the guide portion 74 is formed, the vicinity of the protruding portion 63b and the folded portion 63c can be developed along the window portion 18 (glass 18a), and the head H of the occupant A and the window portion 18 (glass 18a) The airbag main body 33 can be more effectively inserted between the two.

  Next, a second embodiment will be described with reference to FIGS. In addition, about the structure and effect | action similar to the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the second embodiment, in addition to the first embodiment described above, the fifth inflating portion 58 of the airbag main body portion 33 of the airbag 10 is a vehicle compartment of the window portion 19 (window glass 19a). A fifth front inflating portion 81 that is a (second) inflating portion for a window portion that faces the 14 side, and a (second) pillar portion that faces the compartment 14 side of the rear pillar 23. It is divided into a fifth rear inflating portion 82, which is an inflating portion, fore and aft.

  The fifth front expansion portion 81 is a portion facing the head H of the occupant A in the rear seat, is formed in a longitudinal shape along the vertical direction, and the upper portion 81a communicates directly with the rear end portion of the communication passage 59. doing.

  The fifth rear inflating part 82 is located adjacent to the rear part of the fifth front inflating part 81 and inflates and expands to the side of the rear part of the rear seat, that is, the position facing the compartment 14 side of the rear pillar 23. The upper part 82a is in communication with the rear end part of the communication passage 59 directly.

  In addition to the first to fourth partition joints 61, 62, 63, and 64, the main body joint 51 includes a fifth partition joint 84 that is a partition. Similarly to the third partition joint portion 63, the fifth partition joint portion 84 is a window located behind the fourth partition joint portion 64 and near the rear end portion of the airbag joint portion 45. From the lower end of the position facing the portion 19 (glass 19a), it extends in a straight longitudinal direction along the up-down direction in an expanded manner toward the rear upper side, that is, with respect to the base end portion 64a of the fourth partition joint portion 64. A linear portion 84a which is a (second) partition body, a (second) protruding portion 84b continuous with the upper end portion of the linear portion 84a, and a (second) folded portion 84c continuous with the protruding portion 84b. And. And the protrusion part 84b protrudes toward the back upper side from the upper end part of the linear part 84a. Further, the folded portion 84c is folded and bent in an arc shape forward with respect to the protruding portion 84b. Accordingly, a communication port 86 that communicates the communication path 59, the fifth front inflatable portion 81, and the fifth rear inflatable portion 82 is formed at the upper portion of the folded portion 84c. Has been. The fifth partition joint 84 suppresses the amount of expansion of the upper part 81a of the fifth front expansion part 81 and the upper part 82a of the fifth rear expansion part 82 toward the vehicle compartment 14 side. Therefore, the expansion portions 81 and 82 have an expansion amount of the upper portions 81a and 82a in the interior of the vehicle compartment 14 greater than an expansion amount of the lower portions 81b and 82b inward of the vehicle interior 14 due to the fifth partition joint portion 84. It is set small.

  When the airbag 10 is folded, the stacking unit 73 and the guide unit 74 are formed as in the first embodiment. The accumulation portion 73 includes a lower portion of the first inflatable portion 54 and a second inflatable portion located below the projecting portions 63b and 84b and the folded portions 63c and 84c of the third and fifth partition joint portions 63 and 84. A lower part 55b of the fifth front part 81, which is a lower part 58b of the lower part 55b of the third expansion part 56, a lower part 58b of the fourth expansion part 57 and a fifth expansion part 58, and a fifth rear part expansion. The lower part 82b of the part 82 (the lower region B1 of the airbag main body part 33) is arranged, and the guide part 74 has projections 63b, 84b and folded parts 63c of the third and fifth partition joint parts 63, 84, The upper part of the first inflating part 54 located above 84c, the upper part 55a of the second inflating part 55, the upper part 56a of the third inflating part 56, the communication path 59 and the upper part 58a of the fifth inflating part 58. An upper portion 81a of the fifth front inflatable portion 81 and an upper portion 82a of the fifth rear inflatable portion 82 (the upper region B2 of the airbag main body portion 33) are disposed. In particular, the protrusions 63b and 84b and the turn-back portions 63c and 84c of the third and fifth partition joint portions 63 and 84 are positioned at the lower end position P (FIG. 3) of the guide portion 74 that is continuous with the accumulation portion 73. ).

  When the airbag 10 is deployed, the airbag 10 is sequentially deployed from the stored state as in the first embodiment, but the first and second base fabrics 41 and 42 are joined together. The positions of the projecting portion 84b and the folded portion 84c of the partition joint portion 84 are not expanded, and the upper portions 81a and 82a of the expanded portions 81 and 82 located before and after the projecting portion 84b and the folded portion 84c of the fifth partition joint portion 84. (FIG. 6), for example, when the head H of the occupant A in the rear seat is in the HOG state in contact with the glass 19a of the window 19, the rear occupant A located near the front of the rear pillar 23 The positions of the projecting portion 84b and the turn-back portion 84c of the fifth partition joint portion 84 facing the position of the head H are not expanded, and the end portion on the vehicle outer side of the guide portion 74 is the head H and the window portion of the occupant A. It easily enters between the 18 glasses 18a.

  Thus, the configuration of the first embodiment described above can be applied to the rear seat, and the same operational effects can be achieved.

  In each of the above embodiments, the number of base fabrics constituting the airbag body 33 is not limited to two, and may be one or three or more.

  The inflatable portion 52 of the airbag main body 33 includes a pillar portion inflating portion and a window portion inflating portion facing the inside of the center pillar 22 or the rear pillar 23 and the window portion 18 or the window portion 19 located in front of the center pillar 22 or the rear pillar 23. If provided, in addition to the configuration for setting the first to fifth inflating portions 54, 55, 56, 57, 58, for example, a configuration for setting six or more inflating portions or an inflating portion for two to four or less It is good also as a structure to set.

  The present invention can be applied to, for example, an airbag and an airbag apparatus that protects an occupant by being attached and deployed along a side window of an automobile.

10 airbag
14 compartment
18, 19 Window
22 Center pillar, the pillar part
23 Rear pillar which is a pillar part
24 Predetermined surface
32 Gas introduction part
33 Airbag body
41 The first base fabric that is the base fabric
42 Second base fabric, which is a base fabric
55 The second inflating part which is an inflating part for windows
55a, 56a, 82a upper part
55b, 56b, 82b Bottom
56 A third inflating part which is an inflating part for the pillar part
63 3rd division junction which is a division part
63a, 84a Straight section that is the main section
63b, 84b Projection
63c, 84c folded part
73 Stacking unit
74 Guide section as overlapping section
81 Fifth front inflating part which is an inflating part for windows
82 Fifth rear expansion part which is an expansion part for pillar part
84 Fifth section joint which is a section B1 Lower area B2 Upper area

Claims (3)

It is formed in a bag shape by a base fabric, supplied with gas from a folded state, and downward along a predetermined surface including a pillar portion extending along the vertical direction in the passenger compartment and a window portion located in front of the pillar portion. An airbag having an airbag main body that is deployed to
The airbag body is
An inflating portion for the pillar portion that inflates to a position facing the pillar portion;
An inflating portion for a window portion that inflates to a position facing the window portion;
The base cloth is joined to partition between the pillar portion inflating portion and the window portion inflating portion, and the amount of expansion of the pillar portion inflating portion toward the vehicle interior is restricted to be smaller than the lower portion. An air bag characterized by comprising a partitioning section. The compartment is
A partition main body that divides a lower portion of the expansion portion for the pillar portion and a lower portion of the expansion portion for the window portion and extends in the vertical direction;
Continuing on the upper part of the partition part main body, a protruding part protruding backward at the position of the upper part of the expansion part for the pillar part,
2. The airbag according to claim 1, further comprising a folded portion that is continuous with the projecting portion and is folded forward from the projecting portion and positioned at an upper portion of the inflatable portion for the window portion. Provided at the upper part of the airbag body part, comprising a gas introduction part for introducing gas into the airbag body part,
The airbag main body portion is in a folded state so that a lower region below the protruding portion and the folded portion is wound up outward from the passenger compartment, and the protruding portion and the folded portion are outward from the passenger compartment. The airbag according to claim 2, wherein an upper region including the protruding portion and the folded portion includes an overlapping portion that is overlapped with the stacking portion.

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