JP2015186987A - Pedestrian protection airbag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pedestrian protection airbag device capable of promptly and stably deploying an airbag along a front pillar.SOLUTION: A pedestrian protection airbag device 10 comprises: an airbag 12 folded back and stored in a vehicle body in front of a lower portion of a front pillar 18 and inflating and deploying to outside of a vehicle in response to the supply of gas for inflation; a pillar garnish 14 provided to cover an outer surface of the front pillar 18 and including a planned breakage portion 40 formed along a longitudinal direction of the front pillar 18; and a wire 16 whose one end is fixed to an upper portion of the front pillar 18 and whose other end is fixed to the vehicle body, a portion between one end and the other end being disposed inside the pillar garnish 14 and passed through a guide portion 28 provided on the airbag 12, the planned breakage portion 40 being broken in response to inflation and deployment of the airbag 12, and the wire 16 protruding to outside of the pillar garnish 14 to guide the deployment of the airbag 12.

Description

  The present invention relates to a pedestrian protection airbag device used in a vehicle.

  An outer surface deployable airbag device for a vehicle is disclosed (see Patent Document 1). In this airbag device, a guide rod extending in the vertical direction along the outer surface of the front pillar (A pillar) is fixed to the front pillar at the upper and lower ends thereof. A loop-shaped connecting band that connects the bag side portion and the guide rod is attached to the upper end of the bag side portion corresponding to the front pillar. The front pillar is covered with a pillar garnish (resin cover) in which a tear line extends on the front windshield side. When the airbag device is operated, the bag side portion is guided along the guide rod through the connection band while the resin cover is cleaved by the connection band, and is developed along the outer surface of the front pillar.

JP 2004-338676 A

  However, in the above-described conventional example, since the connecting band is in a loop shape, it is considered difficult to cleave the pillar garnish.

  In view of the above fact, an object of the present invention is to quickly and stably deploy an airbag along a front pillar in a pedestrian protection airbag apparatus.

  According to a first aspect of the present invention, there is provided a pedestrian protection airbag device that is folded and housed in a vehicle body in front of a lower portion of a front pillar, inflated and deployed to the outside of the vehicle by receiving inflation gas, and an outer surface of the front pillar A resinous pillar garnish provided to cover and having a portion to be broken along the longitudinal direction of the front pillar, and one end fixed to the upper part of the front pillar and the other end fixed to the vehicle body, A portion between the one end and the other end is disposed inside the pillar garnish and is passed through a guide portion provided in the airbag, and the expected breakage portion is broken along with the inflation and deployment of the airbag, A wire that projects outside the pillar garnish and guides the deployment of the airbag.

  In this airbag device for pedestrian protection, when the airbag is inflated and deployed, the wire arranged inside the resin pillar garnish is pulled up by the airbag that is inflated and deployed outside the vehicle, and the planned rupture portion of the pillar garnish is broken. Let Then, the wire projects outside the pillar garnish through the broken part of the pillar garnish. Since the wire is passed through the guide part of the airbag, the airbag is inflated and deployed while being guided by the wire. Since one end of the wire is fixed to the upper portion of the front pillar, the airbag can be inflated and deployed quickly and stably along the front pillar.

  According to a second aspect of the present invention, in the pedestrian protecting airbag device according to the first aspect, the wire is provided with an extra length portion.

  In this pedestrian protection airbag device, since the extra length portion is provided in the wire, the wire projects in an arc shape outside the pillar garnish when the airbag is inflated and deployed. When the airbag is inflated and guided by the wire, it hardly interferes with the pillar garnish. For this reason, the airbag can be inflated and deployed more quickly and stably.

  According to a third aspect of the present invention, in the pedestrian protection airbag device according to the first or second aspect, the planned rupture portion is ruptured from the planned rupture portion of the pillar garnish to the outside in the vehicle width direction. The pillar garnish has an impact absorbing structure when the flap part is not deployed and an angle that limits the upper limit of the deployment angle when the flap part is deployed. A limiting member is provided.

  In this pedestrian protection airbag device, when the planned rupture portion of the pillar garnish is broken by the wire when the airbag is inflated and deployed, the flap portion is deployed outward in the vehicle width direction. The upper limit of the deployment angle of the flap portion is limited by the angle limiting member. By this flap portion, a reaction force surface when a load from a pedestrian is input to the airbag can be formed. Further, when the flap portion is not deployed, the impact absorbing structure of the pillar garnish can absorb the impact when the load from the pedestrian is input to the front pillar. For this reason, pedestrian protection performance can be ensured irrespective of the presence or absence of the inflation and deployment of the airbag.

  The invention of claim 4 is the airbag device for pedestrian protection according to claim 3, wherein the shock absorbing structure is a structure in which the angle limiting member elastically supports the pillar garnish inside the pillar garnish. is there.

  In this pedestrian protection airbag device, the pillar garnish is elastically supported by the angle limiting member, so that it is possible to ensure shock absorption when the airbag is not deployed without adding a shock absorber. .

  According to a fifth aspect of the present invention, in the pedestrian protecting airbag device according to the third or fourth aspect, the planned rupture portion is formed on the inner side in the vehicle width direction than the center portion in the vehicle width direction of the pillar garnish. ing.

  In this pedestrian protection airbag device, the planned break portion is formed on the inner side in the vehicle width direction than the center portion in the vehicle width direction of the pillar garnish, so that the flap portion can be enlarged. Therefore, the reaction force surface with respect to the airbag becomes larger. For this reason, the load from a pedestrian can be stably received with an airbag.

  According to a sixth aspect of the present invention, in the pedestrian protecting airbag device according to any one of the first to fifth aspects, the wire is disposed along the planned breaking portion.

  In this pedestrian protection airbag device, since the wire is disposed along the planned breakage portion, the planned breakage portion can be efficiently broken by the wire when the airbag is inflated and deployed.

  According to a seventh aspect of the present invention, in the pedestrian protecting airbag device according to any one of the first to fifth aspects, the wire is disposed on the outer side in the vehicle width direction from the planned breaking portion.

  In this pedestrian protection airbag device, the wire is disposed on the outer side in the vehicle width direction from the planned breaking portion, so that when the airbag is inflated and deployed, the flap portion is deployed while the planned breaking portion is broken by the wire. Can do.

  The invention of claim 8 is the pedestrian protection airbag device according to any one of claims 1 to 7, wherein the guide portion is provided at an interval along a sewing portion of the airbag. The airbag is spread flat so that the tabs are aligned in one direction at the center, and each of the tabs is folded bellows with each tab positioned at the top of a mountain fold. The sheet is shrunk in one direction, further folded in half in a V shape with the tab at the center, shrunk in a direction crossing the one direction, and stored in the module case.

  In this pedestrian protection airbag device, the wire is less likely to be entangled when the airbag is stored in the module case, the airbag can be stored compactly, and the deployment behavior of the airbag can be stabilized.

  According to a ninth aspect of the present invention, in the pedestrian protecting airbag device according to the eighth aspect, the airbag is further folded in two in a V shape with the tab at the center and is contracted in a direction intersecting the one direction. And stored in the module case.

  According to this airbag device for protecting pedestrians, the airbag can be stored compactly in a narrow module case.

  As described above, according to the airbag device for protecting a pedestrian according to claim 1, an excellent effect that the airbag can be rapidly and stably deployed along the front pillar is obtained. It is done.

  According to the airbag device for protecting a pedestrian according to claim 2, an excellent effect that the airbag can be inflated and deployed more quickly and stably can be obtained.

  According to the airbag device for protecting a pedestrian according to the third aspect, it is possible to obtain an excellent effect that the pedestrian protection performance can be ensured regardless of whether the airbag is inflated or deployed.

  According to the airbag device for protecting a pedestrian according to claim 4, an excellent effect is obtained that it is possible to ensure the shock absorbability when the airbag is not deployed without separately adding a shock absorber. It is done.

  According to the airbag device for protecting a pedestrian according to the fifth aspect, an excellent effect is obtained that the load from the pedestrian can be stably received by the airbag.

  According to the airbag device for protecting a pedestrian according to the sixth aspect of the present invention, an excellent effect can be obtained in that, when the airbag is inflated and deployed, the planned fracture portion can be efficiently broken by the wire.

  According to the airbag device for protecting a pedestrian according to claim 7, an excellent effect is obtained that the flap portion can be deployed while the planned fracture portion is broken by the wire when the airbag is inflated and deployed. .

  According to the airbag device for protecting a pedestrian according to claim 8, the wire is difficult to be entangled when the airbag is stored in the module case, the airbag can be stored compactly, and the deployment behavior of the airbag is stabilized. The excellent effect of being able to be obtained is obtained.

  According to the airbag device for protecting a pedestrian according to the ninth aspect, it is possible to obtain an excellent effect that the airbag can be stored compactly in a narrow module case.

It is a side view which shows the vehicle provided with the airbag apparatus for pedestrian protection. It is a perspective view which shows an airbag module. It is sectional drawing which shows the internal structure of an airbag module. It is a front view which shows the airbag module seen from the vehicle front side. It is sectional drawing which shows the airbag passed through the inflated airbag and the guide part of the airbag. (A) is an expanded sectional view which shows the state in which the lower case and the nail | claw part of an upper cover are fitting in a module case. (B) is an enlarged sectional view showing a state where the fitting of the claw portion has become stronger due to the inflation pressure of the airbag. It is a 7-7 arrow expanded sectional view in FIG. 1 which shows the internal structure of a pillar garnish. It is a disassembled perspective view which shows the fastening part at the upper end of a pillar garnish, and the cover for plugging up a work hole. It is an expansion perspective view which shows the fracture | rupture plan part, notch, and wire in a pillar garnish. It is sectional drawing which shows the state which the flap part of the pillar garnish developed. It is a perspective view which shows the state which the flap part of the pillar garnish developed. It is a perspective view which shows the state which the flap part expand | deployed and was guided by the wire which protruded from the pillar garnish, and the airbag was inflate-deployed. It is a front view which shows the state which the center parts of the base fabric of the airbag were pulled apart right and left, and this airbag was spread. It is a front view which shows the airbag spread flatly so that a tab may be located in one direction in the center. (A) is a front view which shows the airbag by which the bellows was folded. (B) is a side view of (A) showing a state where the tab is positioned at the top of the mountain fold. It is a front view which shows the airbag folded in half in V shape centering a tab.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. A pedestrian protection airbag device 10 according to the present embodiment includes an airbag 12 (FIGS. 3 and 5), a resin pillar garnish 14 (FIGS. 1 and 7), and a wire 16 (FIG. 3). Have.

  The airbag 12 is a bag body that is folded and accommodated in a vehicle body in front of the lower portion of the front pillar 18 and inflated and deployed to the outside of the vehicle when supplied with inflation gas. As shown in FIG. 3, the airbag 12 is housed in a module case 20 together with an inflator 22 that is a source of inflation gas in a folded state. A gas ejection part 22 </ b> A of the inflator 22 is connected to an opening 12 </ b> A (FIG. 5) provided in the lower part of the airbag 12. An airbag module 30 is configured by the airbag 12, the inflator 22, and the module case 20.

  As shown in FIGS. 3 and 5, a plurality of guide portions 28 are provided on the side of the airbag 12. The guide portion 28 is, for example, a circular annular member, and is arranged at a predetermined interval along the longitudinal direction of the airbag 12. Specifically, the guide portion 28 is provided on each of a plurality of tabs 29 provided at intervals along the sewing portion 13 of the airbag 12. In the illustrated example, three tabs 29 and three guide portions 28 are provided. The wires 16 are passed through the guide portions 28, respectively. The guide portion 28 is not limited to a circular annular member, and may be an oval or D-shaped annular member. Further, the guide portion 28 may be provided with a cut or an opening / closing structure (not shown) so that the wire 16 can be passed through the guide portion 28 from the side of the guide portion 28.

  For example, the airbag 12 is folded as follows. As shown in FIGS. 13 and 14, the airbag 12 is spread flat so that the tabs 29 are arranged in one direction (for example, the vertical direction) at the center. Next, as shown in FIGS. 15 (A) and 15 (B), the airbag 12 is folded in a bellows with each tab 29 positioned at the top of the mountain fold, and is in one direction (for example, up and down direction). To be shortened. Then, as shown in FIG. 16, the airbag 12 is further folded in half in a V shape with the tab 29 at the center, and is contracted in a direction intersecting with the one direction (for example, the left-right direction), and the module case 20 ( 3).

  As a result, the wire is unlikely to be entangled when the airbag 12 is stored in the module case 20, and the airbag 12 can be stored compactly. By folding the airbag 12 in a V shape, the airbag 12 can be stored in a compact module case 20 in a compact manner. In addition, when the width | variety of the module case 20 has room with respect to the airbag 12 folded bellows, this airbag 12 does not need to be folded in V shape.

  As shown in FIGS. 2 and 4, the module case 20 includes, for example, a lower case 24 that opens upward and an upper lid 26 that opens downward. As shown in FIGS. 2 and 3, a tear line 26 </ b> T, which is a planned break portion, is continuously formed at the center in the vehicle width direction of the front surface 26 </ b> A, the upper surface 26 </ b> B, and the rear surface 26 </ b> C of the upper lid 26.

  The tear line 26T extends in the vehicle vertical direction on the front surface 26A and the rear surface 26C (FIG. 3), and extends in the vehicle front-rear direction on the upper surface 26B. The tear line 26T is broken by the inflation pressure of the airbag 12 and the upper lid 26 is opened so that the airbag 12 bulges out from the inside of the module case 20 to the outside. A through hole 26E is formed on the tear line 26T of the front surface 26A of the upper lid 26. The wire 16 extends from the inside of the module case 20 to the outside through the through hole 26E.

  As shown in FIG. 3, the inflator 22 is configured in a cylindrical shape, for example. The inflator 22 is vertically disposed in, for example, a cylindrical storage portion 24A provided in the lower case 24 with the gas ejection portion 22A facing the vehicle upper side. The stud bolt 22B of the inflator 22 penetrates the lower case 24 and protrudes laterally (FIG. 4). A lead wire 22 </ b> C for supplying an ignition current to the inflator 22 extends through the lower case 24 to the outside of the module case 20.

  As shown in FIG. 3 and FIG. 6A, the lower case 24 and the upper lid 26 have a structure that is closed by nail fitting. In FIG. 6A, the upper edge 24U of the lower case 24 is provided with a claw portion 34 having a shape folded back to the vehicle outer side and the vehicle lower side, that is, a bowl-shaped cross section. On the other hand, the lower edge 26L of the upper lid 26 is provided with a claw portion 36 having a shape that is folded back to the vehicle inner side and the vehicle upper side, that is, a cross-sectional hook shape. Since the lower case 24 and the upper lid 26 are both resin molded products having elasticity and the shapes of the claw portions 34 and 36 are the same, the claw portions 34 and 36 can be fitted to each other while being appropriately deformed. Can do.

  In the fitted claw portions 34 and 36, the inner and outer facing surfaces 34A and 36A of the lower case 24 are inclined with respect to the vehicle vertical direction (arrow UP and LW directions), respectively. This inclination direction is a direction toward the outside of the case as it goes toward the vehicle upper side. Thereby, the width | variety of the nail | claw parts 34 and 36 is increasing gradually as it goes to each front-end | tip. A claw portion 38 that engages with the upper edge 24U is provided on the inner surface of the upper lid 26 near the vehicle upper side of the upper edge 24U of the lower case 24. The claw portion 38 is a portion that prevents the claw portions 34 and 36 from coming off due to the upper lid 26 being excessively overlapped with the lower case 24.

  In the module case 20, the upper edge 24 </ b> U of the lower case 24 is covered with an upper lid 26. Further, the claw portion 34 provided on the upper edge 24U has a shape folded back to the vehicle outer side and the vehicle lower side. Accordingly, rain and dust are prevented from entering the airbag module 30 from above and below the vehicle.

  As shown in FIG. 1, the airbag module 30 uses, for example, stud bolts 22 </ b> B (FIG. 4) of an inflator 22 on the side of the apron upper member (not shown) on the fender cover 32 side of the vehicle body. Fastened and fixed. The fixing of the airbag module 30 to the vehicle body is not limited to fastening using the stud bolt 22B.

  In FIG. 7, the pillar garnish 14 is provided so as to cover the outer surface of the front pillar 18. The pillar garnish 14 has a hollow structure having an inner portion 14A and an outer portion 14B. The inner portion 14A and the outer portion 14B are each formed, for example, in an arc shape in cross section. The curvature of the outer portion 14B is larger than the curvature of the inner portion 14A, and a space 14C is formed between the inner portion 14A and the outer portion 14B.

  A clip 42 is fitted into the front pillar 18, and a mounting bracket 44 is attached to the clip 42. The pillar garnish 14 is attached to the mounting bracket 44. Specifically, the inner portion 14 </ b> A of the pillar garnish 14 is attached to the mounting bracket 44.

  FIG. 8 shows a fastening portion 50 for attaching the upper end of the pillar garnish 14 to the attachment bracket 44 (FIG. 7). For example, a screw 46 is used to attach the pillar garnish 14. In the fastening portion 50, one end of the wire 16 is also fastened using the screw 46. That is, the pillar garnish 14 and one end of the wire 16 are fastened together with the mounting bracket 44 (FIG. 7) by the screw 46.

  A work hole 48 is formed at the upper end of the pillar garnish 14 so that the fastening portion 50 is exposed when the pillar garnish 14 is attached. The working hole 48 is normally closed by, for example, a claw fitting type cover 52. The cover 52 is provided with a claw portion 52A, and the pillar garnish 14 is provided with an engaging portion 54. When the claw portion 52 </ b> A engages with the engaging portion 54, the cover 52 is attached to the pillar garnish 14 and the work hole 48 is closed.

  7 and 9, the pillar garnish 14 is formed with a planned fracture portion 40 along the longitudinal direction of the front pillar 18. The planned fracture portion 40 is formed on the inner side in the vehicle width direction of the pillar garnish 14 in the vehicle width direction, for example, on the end portion on the front windshield 56 side. The planned fracture portion 40 is, for example, a thin wall portion. As shown in FIG. 9, for example, a V-shaped notch 14 </ b> K serving as a break starting point may be provided at the lower end of the planned break portion 40. The width of the notch 14K is preferably slightly larger than the diameter of the wire 16.

  As shown in FIG. 7, in the outer portion 14B of the pillar garnish 14, the flap portion 14F that expands outward in the vehicle width direction when the planned break portion 40 breaks from the planned break portion 40 to the vehicle width direction outer side. Is provided. The flap portion 14F corresponds to a portion from the planned fracture portion 40 to the hinge portion 14H in the outer side portion 14B. The hinge portion 14H is formed over the entire length of the pillar garnish 14 at a position near the outer end in the vehicle width direction of the outer portion 14B. Note that the hinge portion 14H may not be provided as long as the flap portion 14F can be deployed when the planned break portion 40 is broken.

  In FIG. 7, the pillar garnish 14 is provided with an impact absorbing structure S when the flap portion 14F is not deployed, and an angle limiting member 58 that limits the upper limit of the deployment angle when the flap portion 14F is deployed. The shock absorbing structure S is a structure in which the angle limiting member 58 elastically supports, for example, the outer portion 14 </ b> B of the pillar garnish 14 inside the pillar garnish 14. The angle limiting member 58 is, for example, a resin plate, and is arranged in the pillar garnish 14 by being bent a plurality of times. Further, the angle limiting member 58 is provided at a plurality of locations in the longitudinal direction of the pillar garnish 14, for example, at three locations (FIG. 11).

  An end portion 58A on the outer side in the vehicle width direction of the angle limiting member 58 is fixed to the inner portion 14A of the pillar garnish 14 by adhesion, welding, or the like. Further, an end 58B of the angle limiting member 58 on the inner side in the vehicle width direction is fixed to the outer side 14B of the pillar garnish 14 by adhesion, welding, or the like. The angle limiting member 58 is bent, for example, four times between the end portions 58A, 58B, and four bent portions 58D, 58E, 58G, 58H are formed on the outer side portion 14B and the inner side portion 14A of the pillar garnish 14. Abuts alternately.

  Concave portions (concave portions 14D, 14E, 14G, and a hinge portion 14H) are formed in the contact portions of the bent portions, respectively. The bent portion 58D corresponds to the concave portion 14D, the bent portion 58E corresponds to the concave portion 14E, the bent portion 58G corresponds to the concave portion 14G, and the bent portion 58H corresponds to the hinge portion 14H. Since the bent portions 58D, 58E, 58G, and 58H are locked in the corresponding concave portions, the movement of the bent portions 58D, 58E, 58G, and 58H is caused when the flap portion 14F absorbs an impact when the flap portion 14F is not deployed. By being suppressed, shock absorption is secured.

  One end of the wire 16 is fixed to the upper portion of the front pillar 18 and the other end is fixed to the vehicle body. A portion between one end and the other end of the wire 16 is arranged inside the pillar garnish 14 as shown in FIG. 7, and a guide provided in the airbag 12 as shown in FIG. Part 28 is passed through. The wire 16 is disposed along the planned fracture portion 40 as indicated by a solid line in FIG. Note that, as indicated by a two-dot chain line in FIG. 7, the wire 16 may be disposed on the outer side in the vehicle width direction from the planned fracture portion 40, for example, near the end portion 58 </ b> B of the angle limiting member 58.

  As described above, one end of the wire 16 is fastened and fixed to, for example, the mounting bracket 44 at the upper portion of the front pillar 18 (FIG. 7) using the screw 46 for attaching the pillar garnish 14 (FIG. 8). Further, the other end of the wire 16 is locked to a stud bolt 22B of the inflator 22, for example, and is fastened and fixed to the vehicle body together with the airbag module 30 (FIG. 3).

  The wire 16 is a guide wire that breaks the planned fracture portion 40 in accordance with the inflation and deployment of the airbag 12 and projects outside the pillar garnish 14 to guide the deployment of the airbag 12 as shown in FIGS. is there. As shown in FIG. 3, the wire 16 is provided with a surplus length portion 16 </ b> A. In order to break the planned fracture portion 40 with the wire 16, the wire 16 needs to be lifted and extended to the outside of the pillar garnish 14 by the airbag 12 that is inflated and deployed. The extra length portion 16A is provided in order to increase the overhang amount of the wire 16.

  Specifically, in the module case 20, the wire 16 is passed from the other end fastened to the vehicle body together with the airbag module 30 to the rear side of the airbag 12 and further to the upper side of the airbag 12. Has been passed. The wire 16 is pulled out from the through hole 26E of the front surface 26A of the upper lid 26 to the outside of the module case 20, drawn from there to the vehicle rear side (not shown), and passed through the inside of the pillar garnish 14. Yes. In this manner, the extra length portion 16A is secured by reciprocating the wire 16 in the vehicle front-rear direction.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 3, in the pedestrian protection airbag apparatus 10 according to the present embodiment, the airbag 12 is inflated and deployed upon receiving supply of inflation gas from the inflator 22. Due to the inflation pressure of the airbag 12, the tear line 26T of the upper lid 26 in the module case 20 is broken. As a result, the airbag 12 inflates to the outside of the module case 20 through the broken portion of the upper lid 26, further deforms the fender cover 32, and expands and deploys outside the vehicle (FIG. 12).

  As shown in FIG. 6B, when the airbag 12 (FIG. 3) is inflated and deployed, if the inflation pressure of the airbag 12 acts in the direction of arrow P from the inside to the outside of the module case 20, the claw portion 34 and 36 proceed in opposite directions to each other in the vehicle vertical direction. Specifically, the claw portion 34 of the lower case 24 advances downward in the vehicle (arrow LW direction), and the claw portion 36 of the upper lid 26 advances in the vehicle upward direction (arrow UP direction). At this time, the claw portion 36 of the upper lid 26 is sandwiched between the lower case 24 and the claw portion 34, and the claw portion 34 is sandwiched between the upper lid 26 and the claw portion 36. The opposing surfaces 34A, 36A of the lower case 24 in the claw portions 34, 36 are inclined in the same direction, so that the claw portions 34, 36 are not easily disengaged. That is, when the airbag 12 (FIG. 3) is inflated and deployed, the fitting of the claws 34 and 36 becomes stronger. When the airbag 12 is inflated and deployed, it is difficult for the upper lid 26 to be detached from the lower case 24. Therefore, the inflation pressure acts on the tear line 26T of the upper lid 26, and the tear line 26T is stably cleaved.

  As shown in FIG. 7, when the airbag 12 is inflated and deployed, the wire 16 disposed inside the resin-made pillar garnish 14 is pulled up by the airbag 12 that is inflated and deployed outside the vehicle, and the pillar garnish 14 is scheduled to break. The part 40 is broken. As shown in FIG. 9, when the notch 14 </ b> K serving as a break starting point is provided at the lower end of the planned fracture portion 40, the planned fracture portion 40 is easily broken from the lower end. In the present embodiment, as shown in FIG. 7 by a solid line and as shown in FIG. 9, since the wire 16 is disposed along the planned breaking portion 40, it is broken by the wire 16 when the airbag 12 is inflated and deployed. The planned portion 40 can be efficiently broken.

  10 and 11, since the wire 16 is passed through the guide portion 28 of the airbag 12, the wire 16 is pulled up by the airbag 12 and stretched to the outside of the pillar garnish 14 through the broken portion of the pillar garnish 14. put out. Specifically, the wire 16 is provided with an extra length portion 16A (FIG. 3), and one end of the wire 16 is fixed to the upper portion of the front pillar 18 (FIG. 8). Therefore, when the airbag 12 is inflated and deployed, the wire 16 projects in an arc shape outside the pillar garnish 14 (the vehicle upper side) (FIGS. 11 and 12). The airbag 12 is guided by the wire 16 in the guide portion 28 and is inflated and deployed along the front pillar 18. At this time, as described above, the wire 16 protrudes in an arc shape on the outer side (the vehicle upper side) of the pillar garnish 14, so that the airbag 12 hardly interferes with the pillar garnish 14. Further, since the guide portion 28 provided on the tab 29 is positioned at the top of the mountain fold in the folded state of the airbag 12, the deployment behavior of the airbag 12 can be stabilized.

  Further, when the air bag 12 is inflated and deployed, when the planned breakage portion 40 of the pillar garnish 14 is broken by the wire 16, the flap portion 14F is deployed outward in the vehicle width direction with the hinge portion 14H as the center. In particular, as shown by a two-dot chain line in FIG. 7, if the wire 16 is disposed on the outer side in the vehicle width direction than the planned breaking portion 40, a moment acts on the flap portion 14 </ b> F. However, it becomes easy to expand the flap portion 14F. 10 and 11, the upper limit of the deployment angle of the flap portion 14 </ b> F is limited by the angle limiting member 58. Therefore, the flap portion 14F forms a reaction force surface when a load from a pedestrian (not shown) is input to the airbag 12, and can hold the airbag 12 at the position of the front pillar 18. it can.

  In the present embodiment, the planned fracture portion 40 is formed on the inner side in the vehicle width direction (on the front windshield 56 side) of the pillar garnish 14 in the vehicle width direction, so that the flap portion 14F can be enlarged. Therefore, the reaction force surface with respect to the airbag 12 becomes larger. For this reason, the load from a pedestrian can be stably received by the airbag 12.

  On the other hand, in FIG. 7, when the flap portion 14F is not deployed, the impact absorption structure S of the pillar garnish 14 can absorb an impact when a load from a pedestrian is input to the front pillar 18. Specifically, by elastically supporting the pillar garnish 14 with the angle limiting member 58, it is possible to ensure shock absorption when the airbag 12 is not deployed without adding a separate shock absorber.

  As described above, in this embodiment, pedestrian protection performance can be ensured regardless of whether the airbag 12 is inflated or deployed.

[Other Embodiments]
As mentioned above, although an example of embodiment of this invention was demonstrated, embodiment of this invention is not limited above, In addition to the above, in a range which does not deviate from the main point, it can implement variously. Of course there is.

  For example, the extra length portion 16A is provided on the wire 16, but the extra length portion 16A may not be provided as long as the wire 16 protrudes outside the pillar garnish. For example, if the distance between both ends of the wire 16 is reduced when the airbag 12 is inflated and deployed, the wire 16 can be slackened, so that the wire 16 can be projected in an arc.

  Moreover, although the flap part 14F shall be provided in the pillar garnish 14, the structure which the pillar garnish 14 does not expand | deploy may be sufficient as long as the wire 16 can project outside the pillar garnish 14.

  The pillar garnish 14 is provided with the shock absorbing structure S and the angle limiting member 58, but these may not be provided. Further, as the shock absorbing structure S, a structure in which the angle limiting member 58 elastically supports the pillar garnish 14 on the upper side of the pillar garnish 14 is described. However, the shock absorbing structure S is not limited to this, for example, a shock absorbing material (see FIG. (Not shown) may be separately arranged in the pillar garnish 14.

  Although the planned fracture portion 40 is formed closer to the front windshield 56 than the central portion in the vehicle width direction of the pillar garnish 14, the position of the planned fracture portion 40 is not limited to this.

DESCRIPTION OF SYMBOLS 10 Pedestrian protection airbag apparatus 12 Airbag 13 Sewing part 14 Pillar garnish 14F Flap part 16 Wire 16A Extra length part 18 Front pillar 20 Module case 28 Guide part 29 Tab 40 Breaking planned part 58 Angle limiting member S Shock absorption structure

Claims (9)

An airbag that is folded and housed in the vehicle body in front of the lower part of the front pillar, and inflated and deployed to the outside of the vehicle by receiving supply of inflation gas
A resinous pillar garnish provided so as to cover the outer surface of the front pillar, and a portion to be broken is formed along the longitudinal direction of the front pillar,
One end is fixed to the upper portion of the front pillar and the other end is fixed to the vehicle body, and a portion between the one end and the other end is disposed inside the pillar garnish and provided in the airbag. A wire that is passed through the guide portion, breaks the portion to be broken as the airbag is inflated and deployed, and projects outside the pillar garnish to guide the deployment of the airbag;
A pedestrian protection airbag device having   The pedestrian protection airbag device according to claim 1, wherein an extra length portion is provided on the wire. On the outer side in the vehicle width direction from the planned breaking portion of the pillar garnish, a flap portion is provided that expands outward in the vehicle width direction by breaking the planned breaking portion.
The pillar garnish is provided with an impact absorbing structure when the flap portion is not deployed, and an angle limiting member that limits an upper limit of a deployment angle when the flap portion is deployed. The airbag apparatus for pedestrian protection as described.   The pedestrian protection airbag device according to claim 3, wherein the shock absorbing structure is a structure in which the angle limiting member elastically supports the pillar garnish inside the pillar garnish.   5. The pedestrian protecting airbag device according to claim 3, wherein the planned fracture portion is formed on the inner side in the vehicle width direction than the center portion in the vehicle width direction of the pillar garnish.   The pedestrian protection airbag device according to any one of claims 1 to 5, wherein the wire is disposed along the planned fracture portion.   The pedestrian protection airbag device according to any one of claims 1 to 5, wherein the wire is disposed on the outer side in the vehicle width direction than the planned breaking portion. The guide portion is provided on each of a plurality of tabs provided at intervals along the sewing portion of the airbag,
The airbag is flattened so that the tabs are aligned in one direction at the center, and each of the tabs is positioned at the top of a mountain fold, and is accordion folded and contracted in the one direction. The airbag device for protecting a pedestrian according to any one of claims 1 to 7, which is accommodated in the pedestrian.   9. The pedestrian protection airbag according to claim 8, wherein the airbag is further folded in two in a V shape with the tab at the center and contracted in a direction crossing the one direction, and stored in the module case. apparatus.

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