JP5652948B2 - Airbag - Google Patents

Description

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

  2. Description of the Related Art Conventionally, an airbag apparatus having an airbag that inflates and deploys by introducing inflation gas is known as a so-called curtain airbag apparatus that deploys an airbag along a window portion of a door on the side of a vehicle cabin. It has been. Normally, such an airbag is accommodated along the upper edge of the window on the side of the passenger compartment, in a compressed state so as to be folded into an elongated shape. When an impact such as a side collision or rollover (rollover) is received, the inflation gas is supplied from the inflator to deploy the airbag, and the airbag is inflated and deployed downward along the side windows. Thus, it is configured to prevent the passenger from being released from the vehicle.

  In such an airbag device, from the viewpoint of occupant protection, a configuration is conceivable in which the shape of the airbag is maintained even when the occupant collides with the deployed airbag. With respect to this point, a plurality of second cells formed in the longitudinal direction along the horizontal direction perpendicular to the vertical cells, with respect to the plurality of vertical cells as the first inflating portions formed in the longitudinal direction along the vertical direction. There is known a configuration in which a horizontal cell as an expansion part is provided and a vertical cell and a horizontal cell are connected by a connected cell. In this configuration, the vertical cells are sequentially expanded vertically downward by the supplied expansion gas, and the expansion gas is filled in the connection cells behind the vertical cells, and the expansion gas is supplied from the connection cells to the horizontal cells. Is supplied and the horizontal cells are expanded to cause each vertical cell to be curved into a bow shape protruding into the vehicle interior so that the lower part of the airbag does not come out of the vehicle (for example, , See Patent Document 1).

JP 2008-290471 A (Page 3, Fig. 2-4)

  In the case of the above conventional configuration, the expansion gas supplied from the inflator is almost filled in one vertical cell, then the expansion gas is sequentially supplied to the next adjacent vertical cell, and the connection cell is filled with the expansion gas. After that, the expansion gas is supplied to the horizontal cell. For this reason, the vertical cells or connected cells closest to the inflator are inflated under high pressure when the output of the inflator is maximized, and the pressure is concentrated, so reinforcement is necessary, and it is easy to manufacture an airbag at low cost. Not.

  The present invention has been made in view of these points, and an object of the present invention is to provide an airbag that can be manufactured at low cost, can be stably and rapidly deployed, and can effectively prevent the passenger from being released from the vehicle. .

The airbag according to claim 1 is an airbag that covers a predetermined surface of the passenger compartment and can be deployed in a planar shape so as to face an occupant of the passenger compartment, and a gas supply unit to which inflation gas is supplied, and the gas An airbag main body connected to the supply unit, and the airbag main body includes at least a first dividing line folded in an arc shape in a direction intersecting a predetermined direction. The first supply line is connected in parallel to the gas supply unit, is curved and partitioned in an arc shape by the first partition line, and can be expanded by the expanded gas flowing from the gas supply unit. An inflatable portion, a second demarcation line that intersects one of the first demarcation lines along the predetermined direction, and the second dilatation line that is demarcated along the predetermined direction; the parts across in the predetermined direction to the expansion of the first The plurality of second inflating portions arranged outside the vehicle, at least one of the first inflating portions, and any one of the second inflating portions communicate with each other and flow into the first inflating portions. And a vent for guiding a part of the inflation gas to the second inflation portion.

  According to a second aspect of the present invention, in the airbag according to the first aspect, the second inflating portions are arranged so as to be separated from each other.

  According to a third aspect of the present invention, in the airbag according to the first or second aspect, the airbag main body portion is disposed with a direction along a side portion of the vehicle compartment as a longitudinal direction, and the gas supply portion is the airbag. Located at the upper edge of the central portion in the longitudinal direction of the main body portion, the first inflating portion opens toward the gas supply portion and is disposed symmetrically with respect to the longitudinal direction of the airbag main body portion It is.

According to the airbag of the first aspect, the airbag body includes the first inflatable portion that is curved and partitioned in a bow shape by the first partition line that is folded in a bow shape in a direction intersecting a predetermined direction. The second inflating part that is disposed along the predetermined direction by the second comparting line that intersects with one of the first compiling lines along the predetermined direction, and the first inflating part in the predetermined direction It is arranged outside the airbag main body so as to cross the vehicle and communicates at least one of the first inflating part and one of the second inflating parts with a vent, thereby suppressing the peak pressure of the inflation gas. Thus, it can be manufactured at low cost without reinforcing the pressure concentration. Further, since the inflated gas is directly guided from the first inflating portion to the second inflating portion, it can be stably and rapidly deployed. Furthermore, since the bending and bending which occur at the time of expansion | deployment of a 1st expansion part are absorbed by expansion | deployment of a 2nd expansion part, a shape can be hold | maintained stably and a passenger | crew's discharge | release outside a vehicle can be prevented effectively.

  According to the airbag of the second aspect, in addition to the effect of the airbag of the first aspect, by arranging the second inflating portions apart from each other, the space between the second inflating portions becomes a non-inflating portion, Since the capacity of the airbag can be reduced, the amount of inflation gas to be supplied can be reduced.

  According to the airbag according to claim 3, in addition to the effect of the airbag according to claim 1 or 2, the gas supply part is arranged at the upper edge of the central part in the longitudinal direction of the longitudinal airbag body part, By opening the first inflating portion toward the gas supply portion, the inflating gas can be efficiently introduced into each first inflating portion and can be rapidly deployed, and the first inflating portion can be quickly deployed with respect to the longitudinal direction of the airbag body portion. By arranging the 1 inflating portion symmetrically, the tension in the longitudinal direction of the airbag main body when the first inflating portion is deployed is increased, and the passenger can be more effectively prevented from being released from the vehicle.

It is a perspective view which shows typically the deployment operation | movement of the airbag of the 1st Embodiment of this invention in order of (a) thru | or (c). It is sectional drawing of the II equivalent position of FIG.1 (b) of an airbag same as the above. It is sectional drawing of the position equivalent to II-II of FIG.1 (b) of an airbag same as the above. It is a disassembled perspective view of an airbag same as the above. It is a perspective view which shows typically the manufacturing method of an airbag same as the above in order of (a) thru | or (d). It is a side view which shows the airbag of the 2nd Embodiment of this invention. It is sectional drawing of the III-III equivalent position of FIG. 6 at the time of expansion | deployment of an airbag same as the above. It is an exploded view of an airbag same as the above. It is a side view which shows the airbag of the 3rd Embodiment of this invention. It is a side view which shows the airbag of the 4th Embodiment of this invention.

  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 12 including the airbag 10 is also called a curtain airbag device, and covers a compartment 14 of a vehicle body 13 constituting an automobile as a vehicle. It is arranged on the roof side part 15 which is an installation part. 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 collision impact or rollover. In addition, it is deployed in a substantially planar manner on the side of the occupant seated in the seat as the object to be protected to protect the occupant.

  In the following description, the direction of the vehicle width direction, the up-down direction as the first direction, the front-rear direction as the second direction, and the like are below (refer to FIG. Arrow D direction), upward (arrow U direction shown in FIG. 2 etc.), front side direction (arrow F direction shown in FIG. 1), rear side direction (arrow R direction shown in FIG. 1), outward direction (in FIG. 2) The arrow W direction) will be described.

  The vehicle body 13 includes seats such as a front seat and a rear seat in which a passenger can sit in a passenger compartment 14, and a window portion (side window) that can be opened corresponding to the front seat and the rear seat. A door with 18 is provided. A plurality of pillars are provided on the side portions on both sides of the passenger compartment 14. And the side wall part 19 which is a predetermined surface is comprised by the side part of the both sides of a vehicle interior by these window parts 18, a door, and each pillar. A ceiling panel of a ceiling portion (not shown) is supported on the upper side of these pillars, that is, the upper edge portion which is one edge portion of the window portion 18.

  The roof side portion 15 is an upper edge portion of the side portion of the passenger compartment 14 along the upper edge of the door opening of the vehicle body 13, and intersects with the edge portion from the edge portions on both sides of the ceiling panel. It is set up to almost the entire length of the foremost pillar and the rearmost pillar extending in the direction of extending, and is virtually constituted by the edge part of the ceiling panel and the frontmost pillar and the rearmost pillar. A side wall portion 19 where the airbag 10 is deployed is set inside the arc. Further, although not shown, a roof trim, which is a soft panel called roof lining or head lining, is disposed on the lower surface of the ceiling panel, that is, the vehicle compartment 14 side. The side is covered.

  The airbag device 12 is a so-called front and rear seat airbag that can protect front and rear occupants. In addition to the airbag 10 that is folded and stored along the roof side portion 15, the rear seat An inflator (not shown) which is a gas generator for supplying an inflation gas G for inflation to the airbag 10, a bracket to which the airbag 10 is attached, and a resin attached along the folded airbag 10 A cover body, a shape holding member that holds the shape of the folded airbag 10, a control device, and the like are provided to constitute a module.

  The airbag 10 includes an airbag body portion 21 formed in a flat bag shape, an inflator connection portion 22 as a gas supply portion that supplies the airbag body portion 21 with an inflation gas G from the inflator, and an airbag body The roof side portion includes a mounting portion 23 formed on the upper edge portion of the portion 21 and a tether portion (not shown) attached to the lower end portion on the front side of the airbag main body portion 21 and is folded long and narrow with the longitudinal direction as the longitudinal direction. 15 is stored. The airbag 10 includes, for example, a first main panel 25 as a first base fabric portion disposed on the side of the passenger compartment 14 and a first main panel 25 joined to one side. A second main panel 26 as a second base fabric portion, and a sub-panel 27 as a third base fabric portion joined to the other side of the second main panel 26, that is, the opposite side to the first main panel 25. Are stacked in the thickness direction. For this reason, the airbag main body 21 has a bag-like indoor-side inflatable portion 31 and an outdoor-side inflatable portion 32 that are inflated and deployed by the inflation gas G supplied from the inflator connecting portion 22 flowing in the thickness direction. It is formed in layers. That is, the airbag main body 21 has a two-layer structure on the vehicle compartment 14 side (vehicle inner side) and the vehicle outer side (vehicle body 13 side).

  The first main panel 25 is also called an occupant-side main panel or the like, and is formed in a substantially rectangular shape that is long in the front-rear direction (horizontal direction). For example, the first main panel 25 corresponds to the inflator connecting portion 22 on the upper side in the longitudinal direction. The first projecting portion 33 that projects in a bent shape toward the rear direction and has a trapezoidal shape that divides the indoor side non-inflatable portion 34 together with the second main panel 26 at the lower side in the longitudinal center portion. A notch 35 is provided. The first main panel 25 has, for example, an inner peripheral joint portion 36 that is sewn and joined to the second main panel 26 on the entire peripheral edge portion except the rear end portion of the first projecting portion 33. In addition, a plurality of first joining lines that are joined to the second main panel 26 are formed in the vicinity of the central portion in the vertical direction so as to be spaced apart from each other. As a result, the indoor-side inflating portion 31 is formed with a plurality of divided main chambers 38 as first inflating portions, and a gas passage portion that communicates with the main chamber 38 from the inflator connecting portion 22. The communication path 39 is formed.

  The inner joint portion 37 is curved, for example, by an adhesive (sealant) into an arcuate shape (arc shape) that is folded back in the front-rear direction intersecting the predetermined vertical direction. That is, the inner joint portion 37 has a linear inclined portion 41 inclined toward the inflator connecting portion 22 from one end side to the other end side, and one end connected to the lower end that is one end of the inclined portion 41 and the other end. A curved portion 42 whose side is folded back in the front-rear direction and a linear straight portion 43 that is continuous with the other end of the curved portion 42 and extends in the front-rear direction are integrally provided. Further, the inner joint portion 37 is a C-shaped first and second inner joint portion 37A that opens toward the rear upper side in order toward the front side with respect to the notch portion 35 (indoor non-expandable portion 34). , 37B are set, and the reverse C-shaped third and fourth inner joint portions 37C, 37D opened toward the front upper side in order toward the rear side with respect to the notch portion 35 (the indoor non-inflatable portion 34). Is set. Therefore, the main chamber 38 includes, for example, first to third mains in order from the inner joints 37A to 37D and the inner peripheral joint 36 to the front side with respect to the notch 35 (the indoor non-inflatable part 34). Chambers 38A, 38B, and 38C are set, and, for example, fourth to sixth main chambers 38D, 38E, and 38F are set in order toward the rear side with respect to the cutout portion 35 (indoor non-expanding portion 34).

  The main chambers 38A to 38F are configured to be substantially airtight or highly airtight. Further, the first main chamber 38A is partitioned between the first inner joint portion 37A and the inner peripheral joint portion 36 (the upper portion of the airbag main body portion 21 and the front portion of the notch portion 35). The chamber 38B is defined between the first and second inner joint portions 37A and 37B, and the third main chamber 38C includes the second inner joint portion 37B and the inner peripheral joint portion 36 (the upper portion of the airbag main body portion 21). , Front and lower). Further, the fourth main chamber 38D is partitioned between the third inner joint portion 37C and the inner peripheral joint portion 36 (the upper portion of the airbag main body portion 21 and the rear portion of the cutout portion 35), and is divided into the first main chamber. 38A, the fifth main chamber 38E is defined between the third and fourth inner joints 37C and 37D, and the sixth main chamber 38F is composed of the fourth inner joint 37D and the inner peripheral joint. 36 (the upper portion, the rear portion, and the lower portion of the airbag main body portion 21). The first to third main chambers 38 </ b> A to 38 </ b> C and the fourth to sixth main chambers 38 </ b> D to 38 </ b> F are symmetrically arranged with respect to the front-rear direction, which is the longitudinal direction of the airbag body 21. ing.

  The communication passage 39 is formed along the upper part of the first to sixth main chambers 38A to 38F and the side edge portions before and after the notch 35 (the indoor non-inflatable part 34). 22 communicates with the first to sixth main chambers 38A to 38F. That is, the first to sixth main chambers 38A to 38F are connected in parallel to the inflator connecting portion 22 through the communication passages 39, respectively.

  The second main panel 26 is also called a vehicle body side main panel or the like, and is formed in a substantially rectangular shape that is long in the front-rear direction, like the first main panel 25. Further, the second main panel 26 corresponds to the first, second, fourth and fifth main chambers 38A, 38B, 38D and 38E of the main chamber 38 in the vicinity of the central portion in the vertical direction. A plurality of round holes 45 are formed at the positions. In the second main panel 26, for example, a second protrusion 46 corresponding to the inflator connecting portion 22 is provided in a bent shape in the rearward direction on the upper side in the longitudinal direction.

  The vent 45 is also called an internal vent hole, and the first to fourth vents 45A, 45B, 45C, 45D are set in communication with the main chambers 38A, 38B, 38D, 38E. . Further, the first to fourth vent holes 45A to 45D are arranged at positions facing the curved portions 42 of the first to fourth inner joint portions 37A to 37D, respectively.

  On the other hand, the sub-panel 27 is formed in a substantially square shape, is smaller than the main panels 25 and 26, specifically, has a vertical dimension substantially equal to the main panels 25 and 26, and the main panels 25 and 26. The front-rear dimension (longitudinal dimension) is less than half the front-rear dimension. The sub-panel 27 is formed with an outer peripheral joint 51 that is sewn and joined to the second main panel 26 at the peripheral edge, and is joined to the second main panel 26. In addition, a plurality of one and other outer joint portions 52 and 53 forming a pair as the second partition line are formed. As a result, in the outdoor inflating portion 32, a sub chamber 54 as a second inflating portion divided into a plurality of parts in the front-rear direction is partitioned and formed in a linear longitudinal shape along the up-down direction. In the present embodiment, the first and second sub-panels 27A and 27B are set at the front and rear positions of the sub-panel 27 relative to the position corresponding to the notch 35 (indoor non-expanding section 34). ing.

  The outer peripheral joint 51 is common to the inner peripheral joint 36 at the outer peripheral edge of the second main panel 26. That is, the peripheral portion of the second main panel 26 of the outer peripheral joint 51 is formed by sewing the main panels 25 and 26 with the inner peripheral joint 36.

  The one and other outer joint portions 52 and 53 are each formed in a linear shape along a vertical direction that is a predetermined direction, for example, by an adhesive (sealant). In addition, the first outer joint portion 52 is provided with first and second outer joint portions 52A and 52B in order from the rear side to the front side of the first sub-panel 27A, and from the front side of the second sub-panel 27B. The third and fourth outer joint portions 52C, 52D are set in order toward the rear side. Similarly, in the other outer joint portion 53, first and second other outer joint portions 53A and 53B are set in order from the rear side to the front side of the first sub-panel 27A, and the front side of the second sub-panel 27B. In order from the rear side to the rear side, third and fourth other outer joint portions 53C and 53D are set. Therefore, the sub-chamber 54 is formed in order from the rear side to the front side of the first sub-panel 27A by the outer joint portions 52A to 52D, 53A to 53D and the outer peripheral joint portion 51 (upper and lower portions of the sub-panel 27), for example. First and second sub-chambers 54A and 54B are set, and for example, third and fourth sub-chambers 54C and 54D are set in order from the front side to the rear side of the second sub-panel 27B.

  These subchambers 54A to 54D are configured to be substantially airtight or highly airtight. These first to fourth sub-chambers 54A to 54D are arranged so as to cut through the main chamber 38, respectively, and intersect the first to sixth main chambers 38A to 38F of the main chamber 38 to the outside of the vehicle. It is piled up.

  Specifically, in the present embodiment, the first one and other outer joint portions 52A and 53A are at the positions of the inclined portion 41 and the straight portion 43 with respect to the first inner joint portion 37A (upper and lower two places), respectively. Since the first sub-chamber 54A is positioned so as to intersect, the first sub-chamber 54A is positioned so as to overlap the first main chamber 38A (and the second and third main chambers 38B and 38C). Similarly, the second one and other outer joint portions 52B and 53B are positioned so as to intersect the second inner joint portion 37B at the positions of the inclined portion 41 and the straight portion 43 (upper and lower two places), respectively. Therefore, the second sub-chamber 54B is positioned so as to overlap the second main chamber 38B (and the third main chamber 38C). Further, the third one and the other outer joint portions 52C and 53C are positioned so as to intersect with the third inner joint portion 37C at the positions of the inclined portion 41 and the straight portion 43 (upper and lower two places), respectively. The third sub-chamber 54C is positioned so as to overlap the fourth main chamber 38D (and the fifth and sixth main chambers 38E and 38F). The fourth one and the other outer joint portions 52D and 53D intersect with the fourth inner joint portion 37D at the positions of the inclined portion 41 and the straight portion 43 (upper and lower two places), respectively. The fourth sub-chamber 54D is positioned so as to overlap the fifth main chamber 38E (and the sixth main chamber 38F). The first to fourth other outer joint portions 53A to 53D may intersect the inner joint portions 37A to 37D at the curved portion 42, respectively, or may be in contact with the curved portion 42. Good. That is, the pair of one and other outer joint portions 52 and 53 may be arranged so as to intersect at least three or more with respect to the one inner joint portion 37.

  Further, the first one and other outer joint portions 52A and 53A are positioned before and after the first vent 45A, and the second one and other outer joint portions 52B and 53B are the second vent 45B. The third one and other outer joints 52C, 53C are located before and after the third vent 45C, and the fourth one and other outer joints 52D, 53D are the fourth Located before and after the vent 45D. The first to fourth sub-chambers 54A to 54D and the first, second, fourth, and fifth main chambers 38A, 38B, 38D, and 38E are connected to each other by the first to fourth vent holes 45A to 45D. Are in direct communication with each other.

  Furthermore, between the first outer joint 52A and the second other outer joint 53B, and between the third other outer joint 53C and the fourth outer joint 52D. The first and second outdoor non-expanding portions 55A and 55B are longitudinally inflatable along the vertical direction. That is, the sub-chambers 54 (first to fourth sub-chambers 54A to 54D) are spaced apart from each other in the front-rear direction and are disposed intermittently.

  For example, a plurality of attachment portions 23 of the airbag 10 are formed on the upper edge portion of the airbag main body portion 21. Each attachment portion 23 is formed integrally with at least one of the panels 25, 26, 27 constituting the airbag main body portion 21, for example.

  Further, the tether portion is for fixing the airbag 10 to the passenger compartment 14, and is also called a hanging string, a tether, a tether belt, or a strap. For example, in the present embodiment, the tether portion is located below the front portion of the airbag 10.

  Further, the cover body is also called a garnish or a pillar garnish, and is arranged almost the entire length of the frontmost pillar and the rearmost pillar of the roof side part 15, covering the tether part and a part of the folded airbag 10. To cover. The cover body is partially bent when the airbag 10 is deployed, so that the airbag 10 can be inflated and deployed.

  On the other hand, the inflator includes a cylindrical inflator main body, and the inflator main body has a combustion type (pyro technique type) for burning the medicine, a storage type (storage type) for storing the expansion gas G at high pressure, or these combustion A gas generating means such as a hybrid type combining a formula and a storage type is incorporated. The inflator main body is provided with a gas injection part for injecting the inflation gas G, and the gas injection part is connected to the inflator connection part 22 of the airbag 10 by a connecting pipe. The inflator body is provided with a connector portion to which an electric wire called a harness is connected.

  Furthermore, the control device is electrically connected to the inflator.

  In addition, the shape holding member is a member that holds the shape of the airbag 10 folded into a predetermined shape to prevent the airbag 10 from collapsing, and includes a tubular member provided with a breakable slit, a breakable adhesive tape, and the like. Used. The airbag 10 can be folded in various shapes. For example, the airbag 10 can be folded in a roll shape from the lower side, and the upper communication path 39 can be folded in a bellows shape. .

  Next, a method for manufacturing the airbag 10 will be described.

  First, as shown in FIG. 5 (a), a first main panel 25 and a second main panel 26, which are respectively formed in a predetermined shape in advance, are overlapped with each other, and as shown in FIG. The main panels 25 and 26 are joined by the joint portion 37 (first to fourth inner joint portions 37A to 37D).

  Next, as shown in FIG. 5C, the sub-panel 27 (first and second sub-panels 27A and 27B) is superimposed on the second main panel 26 on the side opposite to the first main panel 25, As shown in FIG. 5D, one outer joint portion 52 (first to fourth first outer joint portions 52A to 52D) and another outer joint portion 53 (first to fourth other outer joint portions). 53A to 53D) these second main panel 26 and sub panel 27 (first and second sub panels 27A and 27B) are joined.

  Thereafter, the outer peripheries of the main panels 25 and 26 and the sub-panel 27 are sewn to form the peripheral joints 36 and 51, so that the main chamber 38 (first to sixth main chambers) is formed as shown in FIG. 38A to 38F) and the subchamber 54 (first to fourth subchambers 54A to 54D) are formed, and the inflator connecting portion 22 is formed by the first and second protrusions 33 and 46. To complete the airbag 10.

  Next, an operation for attaching the airbag device 12 to the vehicle body 13 will be described.

  In this mounting operation, first, the module of the airbag device 12 is brought into the vehicle compartment 14, the airbag 10 is arranged while being bent along the roof side portion 15, and the mounting portion 23 is fixed using a fixture via a bracket. Fix to the upper fixing point of the roof side 15.

  Then, the tether portion of the airbag 10 is placed along the foremost pillar, and this tether portion is attached to the pillar with a bolt or the like (not shown). Further, the inflator is attached to the vehicle body 13 using a retainer (not shown), and the harness led out from the inflator is connected to a control device provided in the vehicle body 13.

  Further, a cover body is attached to each pillar of the roof side portion 15, and a roof trim is attached to a ceiling panel of the vehicle body 13, and the airbag device 12 is covered with the cover body and the roof trim, whereby the vehicle body 13 of the airbag device 12 is covered. The installation work to the roof side portion 15 is completed.

  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 is operated by the control device. When the inflation gas G injected from the inflator is introduced into the airbag main body 21 from the inflator connecting portion 22 as shown in FIG. 1A, first, the inflation gas G is introduced into the communication passage 39. Then, the communication passage 39 is expanded, the shape maintaining member is cleaved, the roof trim is pushed downward, and the airbag main body portion 21 of the airbag 10 quickly protrudes downward from the roof side portion 15. Next, as shown in FIG. 1B, the main chamber 38 (first to sixth main chambers 38A to 38F) is developed almost simultaneously by the expansion gas G introduced through the communication passage 39, and FIG. As shown in c), the expanded gas G introduced into the first, second, fourth and fifth main chambers 38A, 38B, 38D, 38E is supplied to the first to fourth vents 45A of the vent 45. To 45D (first to fourth subchambers 54A to 54D) are sequentially and sequentially guided through -45D, and the subchamber 54 is developed in accordance with the development of the main chamber 38. As a result, as shown in FIG. 2, the airbag 10 quickly inflates and deploys in a curtain shape covering the side wall portion 19 including the window portion 18. The airbag 10 is deployed instantaneously after the inflation gas G is introduced, and the operations shown in FIGS. 1 (a) to 1 (c) are performed simultaneously with almost no time difference.

  When the occupant comes into contact with the airbag 10 at the time of a side collision of the vehicle, for example, the impact is absorbed by the main chamber 38 deployed on the occupant side (the side opposite to the vehicle body of the side wall 19) and intermittently on the vehicle exterior. The provided subchamber 54 maintains the shape of the airbag 10 and prevents the airbag 10 from slipping out of the window.

In this way, the main chamber 38 partitioned by the inner joint portion 37 folded back in the direction ( front-rear direction) intersecting the predetermined direction (vertical direction) is disposed on the vehicle compartment 14 side of the airbag main body 21, A sub-chamber 54 defined by outer joints 52 and 53 that intersects one of the inner joints 37 along a predetermined direction (vertical direction) is disposed outside the airbag body 21, and at least one of the main chambers 38 is disposed. By communicating the heel and any of the sub-chambers 54 with the vent 45, the peak pressure of the inflation gas G can be suppressed and the airbag 10 can be manufactured at low cost without reinforcing the pressure concentration.

  Further, since the inflation gas G is directly guided from the main chamber 38 to the sub chamber 54, the airbag 10 can be stably and rapidly deployed.

  Further, since the deflection and bending generated when the main chamber 38 is deployed are absorbed by the deployment of the sub-chamber 54, the shape can be stably maintained, and the passenger can be effectively prevented from being released from the vehicle. That is, by expanding the main chamber 38 into a bow shape, the main chamber 38 (inner joint portion 37) and the sub-chamber 54 (outer joint portions 52, 53) intersect at three or more points. Since each chamber 38, 54 can be received by the tension surface instead of the tension line when the air bag 10 comes into contact with the air bag 10, the deflection of the air bag 10 can be more effectively suppressed, and the passenger's release from the vehicle is more stable. Can be prevented.

  In addition, since the airbag 10 can be configured by three types of panels 25, 26, and 27, the airbag 10 can be produced at a lower cost than the conventional multilayer airbag configured by four or more types of panels. By providing the subchamber 54 intermittently, the space between the subchambers 54 becomes a non-inflatable portion (outdoor non-inflatable portions 55A and 55B), and the capacity of the entire airbag 10 can be reduced. Therefore, the inflation gas G supplied from the inflator As a result, the size of the inflator can be reduced and the cost can be reduced.

  Further, the inflator connecting portion 22 is disposed on the upper edge of the longitudinal central portion of the longitudinal airbag main body portion 21 and the main chamber 38 is opened toward the inflator connecting portion 22 so that each main chamber 38 is opened. Thus, the inflation gas G is efficiently introduced, and the airbag 10 can be deployed more quickly. Further, by arranging the arc-shaped main chambers 38 in line symmetry with respect to the longitudinal direction of the airbag main body 21, the one end side (front side) and the other end side (rear side) of the airbag main body portion 21 are arranged. The main chamber 38 is formed in a substantially reverse shape. For this reason, the tension in the longitudinal direction of the airbag main body portion 21 at the time of deployment increases, and the passenger can be more effectively prevented from being released from the vehicle.

  Since the inner joint portion 37 is formed by folding back and forth in the front-rear direction, the expansion gas G introduced into the main chambers 38 from the communication passage 39 flows along the inclined portion 41 and the straight portion 43 of the inner joint portion 37. Guided to the curved portion 42. Therefore, by arranging the vent 45 (first to fourth vents 45A to 45D) at a position facing the curved portion 42 of the inner joint portion 37, the expansion gas G introduced into the main chamber 38 is This can lead to the sub chamber 54 more effectively.

  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, first to sixth inner joint portions 61A, 61B, 61C, 61D, 61E, 61F are set in the inner joint portion 37 of the first embodiment. is there.

  The inner joint portion 37 has a linear upper inclined portion 63 inclined toward the inflator connecting portion 22 from one end side to the other end side, and one end is continuous with the lower end that is one end of the upper inclined portion 63, and the other end side is It integrally has a curved portion 64 folded back in the front-rear direction, and a linear lower inclined portion 65 that is continuous with the other end of the curved portion 64 and is inclined downward as the distance from the curved portion 64 increases. ing. That is, the first to third inner joint portions 61A, 61B, 61C set in order toward the front side with respect to the cutout portion 35 (the indoor non-inflatable portion 34) are formed in a square shape that opens toward the rear upper side. The fourth to sixth inner joint portions 61D, 61E, 61F that are formed in this manner and are set in order toward the rear side with respect to the notch portion 35 (the indoor non-inflatable portion 34) are reversely opened toward the front upper side. It is formed in a square shape. Therefore, the main chamber 38 includes, for example, first to fourth mains in order from the notch 35 (the indoor non-inflatable part 34) to the front side by the inner joints 61A to 61F and the inner peripheral joint 36. Chambers 66A, 66B, 66C, and 66D are set, and for example, fifth to eighth main chambers 66E, 66F, 66G, and 66H are set in order toward the rear side with respect to the cutout portion 35 (the indoor non-expandable portion 34). Has been.

  These main chambers 66A to 66H are configured to be substantially airtight or highly airtight. The first main chamber 66A is partitioned between the first inner joint portion 61A and the inner peripheral joint portion 36 (the upper portion of the airbag main body portion 21 and the front portion of the notch portion 35). The chamber 66B is partitioned between the first and second inner joints 61A and 61B, and the third main chamber 66C is partitioned between the second and third inner joints 61B and 61C, and the fourth main The chamber 66D is partitioned between the third inner joint portion 61C and the inner peripheral joint portion 36 (the upper portion, the front portion, and the lower portion of the airbag main body portion 21). Further, the fifth main chamber 66E is partitioned between the fourth inner joint portion 61D and the inner peripheral joint portion 36 (the upper portion of the airbag main body portion 21 and the rear portion of the cutout portion 35), and is divided into the first main chamber. 66A, the sixth main chamber 66F is partitioned between the fourth and fifth inner joints 61D and 61E, and the seventh main chamber 66G is composed of the fifth and sixth inner joints 61E and 61F. The eighth main chamber 66H is partitioned between the sixth inner joint portion 61F and the inner peripheral joint portion 36 (the upper portion, the rear portion, and the lower portion of the airbag main body portion 21). The first to fourth main chambers 66 </ b> A to 66 </ b> D and the fifth to eighth main chambers 66 </ b> E to 66 </ b> H are arranged line-symmetrically with respect to the front-rear direction, which is the longitudinal direction of the airbag body 21. ing.

  In addition, the sub-panel 27 is formed in a rectangular shape (rectangular shape) that is long in the vertical direction, and is smaller than each main panel 25, 26, specifically, with a vertical dimension substantially equal to each main panel 25, 26. In addition, each of the main panels 25 and 26 has a front-rear dimension that is less than 1/6 of the front-rear dimension (longitudinal dimension). In addition, the upper and lower edges of the sub-panel 27 are integrally sewn together with the first main panel 25 by the inner peripheral joint 36 with respect to the second main panel 26, and both the front and rear sides are joined. One and other outer joint portions 52 and 53 are joined to the second main panel 26. In the present embodiment, the first to third sub-panels 68A, 68B, 68C are sequentially set to the front side of the sub-panel 27 in front of the position corresponding to the notch 35 (indoor non-expanding portion 34). The fourth to sixth sub-panels 68D, 68E, and 68F are sequentially set to the rear side behind the position corresponding to the notch 35 (the indoor non-inflatable portion 34).

  In addition, the first and other outer joint portions 52 and 53 are provided with the first one and other outer joint portions 71A and 72A before and after the first sub-panel 68A, and the first and other outer joint portions 52 and 53 are disposed before and after the second sub-panel 68B. Two one and other outer joints 71B and 72B are set, and the third one and other outer joints 71C and 72C are set before and after the third sub-panel 68C, and the first and other outer joints 71B and 72B are set before and after the fourth sub-panel 68D. Four one and other outer joints 71D and 72D are set, and the fifth one and other outer joints 71E and 72E are set before and after the fifth sub-panel 68E, and the first and other outer joints 71D and 72D are set before and after the sixth sub-panel 68F. One and other outer joints 71F and 72F of 6 are set. Therefore, the sub-chamber 54 corresponds to the cutout portion 35 (the indoor non-inflatable portion 34) by the outer joint portions 71A to 71F, 72A to 72F and the inner peripheral joint portion 36 (upper and lower portions of the sub panels 68A to 68F). For example, first to third sub-chambers 73A, 73B, 73C are set in order from the position to the front side, and for example, in order from the position corresponding to the cutout portion 35 (indoor non-expanding portion 34) to the rear side, for example, 4th to 6th sub-chambers 73D, 73E, and 73F are set.

  These subchambers 73A to 73F are configured to be substantially airtight or highly airtight. These first to sixth sub-chambers 73A to 73F are arranged so as to cut through the main chamber 38, respectively, and intersect the first to eighth main chambers 66A to 66H of the main chamber 38 to the outside of the vehicle. It is piled up.

  Specifically, in the present embodiment, the first one and the other outer joints 71A, 72A are at the positions of the inclined parts 63, 65 with respect to the first inner joint 61A (upper and lower two places), respectively. Since the first sub-chamber 73A is positioned so as to intersect, the first sub-chamber 73A is positioned so as to overlap the first main chamber 66A (and the second main chamber 66B). Similarly, the second one and the other outer joints 71B and 72B are positioned so as to intersect with the second inner joint 61B at the positions of the inclined parts 63 and 65 (two places on the upper and lower sides), respectively. Therefore, the second sub-chamber 73B is positioned so as to overlap the second main chamber 66B (and the third main chamber 66C). Further, the third one and the other outer joints 71C and 72C are positioned so as to intersect with the third inner joint 61C at the positions of the inclined parts 63 and 65 (two places on the upper and lower sides), respectively. The third sub-chamber 73C is positioned so as to overlap the third main chamber 66C (and the fourth main chamber 66D).

  In addition, the fourth one and other outer joints 71D and 72D are positioned so as to intersect with the fourth inner joint 61D at the positions of the inclined parts 63 and 65 (two places on the upper and lower sides), respectively. The fourth sub chamber 73D is positioned so as to overlap the fifth main chamber 66E (and the sixth main chamber 66F). Further, the fifth one and the other outer joints 71E and 72E are located so as to intersect with the fifth inner joint 61E at the positions of the inclined parts 63 and 65 (two places on the upper and lower sides), respectively. The fifth sub-chamber 73E is positioned so as to overlap the sixth main chamber 66F (and the seventh main chamber 66G). In addition, the sixth one and other outer joints 71F and 72F are positioned so as to intersect with the sixth inner joint 61F at the positions of the inclined parts 63 and 65 (two locations on the upper and lower sides), respectively. The sixth sub-chamber 73F is positioned so as to overlap the seventh main chamber 66G (and the eighth main chamber 66H).

  The first to sixth other outer joint portions 72A to 72F may intersect with the first to sixth inner joint portions 61A to 61F, respectively, at the curved portion 64, or to the curved portion 64. You may touch. That is, the pair of one and other outer joint portions 52 and 53 may be arranged so as to intersect at least three or more with respect to the one inner joint portion 37.

  Further, between the first outer joint portion 71A and the second other outer joint portion 72B, between the second outer joint portion 71B and the third other outer joint portion 72C, the third Between the one outer joint 71C and the inner peripheral joint 36, between the fourth other outer joint 72D and the fifth first outer joint 71E, and the fifth other outer joint 72E. Between the sixth outer joint portion 71F and between the sixth other outer joint portion 72F and the inner peripheral joint portion 36, the first to sixth portions that do not expand in the vertical direction are formed. The non-expandable portions 77A, 77B, 77C, 77D, 77E, and 77F. That is, the sub-chamber 54 (first to sixth sub-chambers 73A to 73F), in other words, the sub-panel 27 (first to sixth sub-panels 68A to 68F) are spaced apart from each other in the front-rear direction and intermittently. Has been placed.

  The first to third and fifth to seventh main chambers 66A to 66C, 66E to 66G and the first to sixth sub-chambers 73A to 73F are in direct communication with each other through the vent hole 45. . In the present embodiment, the vent 45 communicates with the main chambers 66A to 66C and 66E to 66G, and the first to sixth vents 78A, 78B, 78C, 78D, 78E, and 78F are set.

  The first one and other outer joints 71A and 72A are positioned before and after the first vent 78A, and the second one and other outer joints 71B and 72B are the second vent 78B. The third one and other outer joints 71C, 72C are located before and after the third vent 78C, and the fourth one and other outer joints 71D, 72D are the fourth The fifth one and other outer joints 71E and 72E are located before and after the fifth vent 78D, and the sixth one and other outer joints 71F and 72F are located before and after the fifth vent 78E. Are located in front of and behind the sixth vent 78F. Further, the first to sixth vent holes 78A to 78F are arranged at positions facing the curved portion 64 of the first to sixth inner joint portions 61A to 61F, respectively.

  Then, similarly to the first embodiment, the first main panel 25 and the second main panel 26, which are respectively formed in a predetermined shape, are connected to the inner joint portion 37 (first to sixth inner sides). The sub-panels 27 (first to sixth sub-panels 68A to 68F) are connected to the second main panel 26 on the opposite side to the first main panel 25, and are joined to the second main panel 26 by one outer side. Each main panel 25 is joined by a joint portion 52 (first to sixth outer joint portions 71A to 71F) and another outer joint portion 53 (first to sixth other outer joint portions 72A to 72F). , 26 and the outer periphery of the sub-panel 27 to form the inner peripheral joint 36, the main chamber 38 (first to eighth main chambers 66A to 66H) and the sub-chamber 54 (first to sixth sub-panels) are formed. The air bag body 21 formed with the chambers 73A to 73F) is formed. As well as, by the first and second projecting portions 33, 46 forming the inflator connection portion 22 to complete the air bag 10.

  When the inflation gas G injected from the inflator that has been activated in the event of a side collision or rollover of the vehicle is introduced into the airbag body 21 from the inflator connecting portion 22, the inflation gas G is first introduced into the communication passage 39. Then, the communication passage 39 is expanded, the shape maintaining member is cleaved, the roof trim is pushed downward, and the airbag main body portion 21 of the airbag 10 quickly protrudes downward from the roof side portion 15. Next, the main chamber 38 (first to eighth main chambers 66A to 66H) is developed almost simultaneously by the expansion gas G introduced through the communication passage 39, and the first to third, fifth to seventh mains are developed. The expansion gas G introduced into the chambers 66A to 66C and 66E to 66G is supplied to the sub chamber 54 (first to sixth sub chambers 73A to 73F) via the first to sixth vent holes 78A to 78F. Directly and sequentially, the sub-chamber 54 expands according to the expansion of the main chamber 38. As a result, the airbag 10 quickly inflates and deploys in a curtain shape covering the side wall portion 19 including the window portion 18.

In this way, the main chamber 38 partitioned by the inner joint portion 37 folded back in the direction ( front-rear direction) intersecting the predetermined direction (vertical direction) is disposed on the vehicle compartment 14 side of the airbag main body 21, A sub-chamber 54 defined by outer joints 52 and 53 that intersects one of the inner joints 37 along a predetermined direction (vertical direction) is disposed outside the airbag body 21, and at least one of the main chambers 38 is disposed. By having a configuration similar to that of the first embodiment, such as communication between the car and any one of the sub-chambers 54 through the vent 45, the same effects as those of the first embodiment can be achieved.

  Further, by dividing the sub-panel 27 into sub-chambers 54, it is possible to reduce the amount of base fabric that forms the sub-panel 27 and to sew the sub-panel 27 separately from the second main panel 26. And the manufacturability becomes better.

  In the second embodiment, the same effect can be obtained even if the inflator connecting portion 22 is provided on the rear upper side of the airbag main body 21 as in the third embodiment shown in FIG. it can. Further, the expansion gas G supplied from the inflator connecting portion 22 is in the front side, that is, the first to fourth main chambers 66A to 66D side and the rear side, that is, the fifth to fifth portions, at the position of the notch 35 (indoor non-expanding portion 34). The fifth to eighth main chambers 66E to 66H, which are branched almost equally to the eighth main chambers 66E to 66H and relatively close to the inflator connecting portion 22, are expanded relative to the inflator connecting portion 22. The front side and the rear side of the airbag main body 21 are deployed almost uniformly without being too early than the deployment of the first to fourth main chambers 66A to 66D, which are relatively distant from each other. The longitudinal airbag 10 can be deployed in a more balanced manner.

  In the third embodiment, the fourth to sixth inner joint portions 61D to 61F are replaced with the first to third inner joint portions 61A to 61F, as in the fourth embodiment shown in FIG. The first to eighth main chambers 66A to 66H may be configured so as to open toward the inflator connecting portion 22 as a bow shape having a square shape that is in the same direction as 61C. In this case, the inflation gas G supplied from the inflator connecting portion 22 is more easily introduced into the main chambers 66A to 66H, and the airbag 10 can be deployed more quickly.

  Furthermore, the configurations of the third and fourth embodiments can be applied to the first embodiment.

  Further, in each of the above-described embodiments, the inner joint portion 37 can have any shape as long as at least a part thereof is folded back in a predetermined direction along which the outer joint portions 52 and 53 are aligned. . In this case, the outer joint portions 52 and 53 can be arranged so as to intersect with the inner joint portion 37 at three or more locations, thereby achieving the same operational effects as those of the above embodiments.

  Further, the shape and size of the vent 45 can be arbitrarily changed as long as the main chamber 38 and the sub-chamber 54 can be directly communicated with each other. In particular, the main chamber 38 and the sub-chamber 54 may be configured to directly communicate with each other through a plurality of vent holes.

  Further, any number of main chambers 38 and sub chambers 54 can be provided.

  And, the airbag 10 is not limited to a configuration that extends from the upper side to the lower side and covers the side window 18 of the automobile, for example, a so-called door mount airbag that expands from the upper part of the door toward the upper side, Alternatively, the present invention can be applied to an appropriate airbag device that needs to be inflated and deployed in a planar shape along a predetermined surface, such as a so-called side airbag that is deployed from the back side of the seat toward the front side.

  INDUSTRIAL APPLICABILITY The present invention can be applied to an airbag that protects an occupant by being attached and deployed along a window portion on the side of an automobile.

10 airbag
14 compartment
19 Side wall that is a predetermined surface
21 Airbag body
22 Inflator connection as gas supply
37 Inner joint that is the first lane marking
38 Main chamber as first inflatable part
45 Vent
52 One outer joint which is the second lane marking
53 Other outer joint that is the second lane marking
54 Subchamber as second expansion part G Expansion gas

Claims (3)

An airbag that covers a predetermined surface of the passenger compartment and that can be deployed in a plane facing the passenger in the passenger compartment,
A gas supply unit to which the expansion gas is supplied;
An airbag main body connected to the gas supply unit;
The airbag body is
A first partition line folded in an arcuate shape at least partially in a direction intersecting a predetermined direction;
A plurality of first expansions connected in parallel to the gas supply unit , curved in a bow shape by the first partition line, and each expandable by an expansion gas flowing in from the gas supply unit And
A second lane marking that intersects any of the first lane markings along the predetermined direction;
A plurality of second portions that are partitioned along the predetermined direction by the second partition line and are arranged outside the vehicle so as to cross the first inflating portion in the predetermined direction and overlap the first inflating portion. An inflatable portion of
A vent opening that communicates at least one of the first inflatable portions with one of the second inflatable portions and guides a part of the inflated gas flowing into each of the first inflatable portions to the second inflatable portion. An air bag characterized by comprising: The airbag according to claim 1, wherein the second inflatable portions are arranged to be separated from each other. The airbag body is disposed with the direction along the side of the passenger compartment as the longitudinal direction,
The gas supply part is located at the upper edge of the central part in the longitudinal direction of the airbag body part,
The airbag according to claim 1 or 2, wherein the first inflatable part opens toward the gas supply part and is arranged symmetrically with respect to the longitudinal direction of the airbag main body part.

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