JP2006069291A - Folding method of airbag and protection device for non-occupant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To quickly move a front hood of an automobile by an airbag. <P>SOLUTION: The folded airbag 21 is stored under the rear end of the hood 3. The airbag 21 is provided with a first air chamber 41 having a hood pressing part pressing up the hood 3, and a second air chamber 42 having a pillar covering part 46 covering an A pillar. The second air chamber 42 is wound and folded after being folded at the folding line along the longitudinal direction of the A pillar. The first air chamber 41 is folded so as to enfold the second air chamber 42. When a vehicle body 1 collides with a pedestrian, an inflator 22 is started to supply gas to the first air chamber 41 of the airbag 21. The gas stays in the first air chamber 41 at the initial stage of the deployment to deploy the first air chamber. The rear end part of the hood 3 is pushed up by a predetermined dimension with the pressure of the deployment to secure the space where the hood 3 is deformed. Afterward, the gas is supplied to the second air chamber 42 and the pillar covering part 46 of the second air chamber 42 is deployed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a non-occupant protection airbag folding method and a non-occupant protection device that protects a colliding non-occupant when a collision between a non-occupant such as a pedestrian and a vehicle is unavoidable.

2. Description of the Related Art Conventionally, there has been proposed a pedestrian protection device including a so-called pedestrian protection airbag that reduces a shock to a pedestrian when a collision between a vehicle and a pedestrian is unavoidable. This pedestrian protection device supports the rear end portion of the hood at the front of the vehicle body so as to be lifted, and stores a bag-like airbag folded under the rear end of the hood. And when this pedestrian protection device detects a collision between a vehicle and a pedestrian, the gas is supplied to deploy the airbag, the rear end of the hood is lifted by this airbag, and the walking When the person collides with the hood, the space where the hood deforms is secured to improve shock absorption characteristics. The airbag covers the pillars on both sides of the windshield, and the pedestrian's head is pillared. The impact is reduced when it collides with the part. The airbag has a portion that lifts the hood with a deploying force and protrudes upward to cover the pillar portion, and is formed in a substantially U-shaped bag shape when viewed from the front (for example, a patent) Reference 1).
JP 2000-264146 A (first page, FIG. 3-4)

  In the pedestrian protection device described above, in order to secure a space for deformation of the hood and to smoothly and quickly deploy it from the gap between the hood and the cowl portion where the portion covering the pillar portion of the airbag is lifted, a predetermined hood is used. It is necessary to lift it quickly by a distance of 5 mm and to hold it stably at the lifted position. However, the mass of the hood is not small, and in order to quickly lift the hood, there is a problem that it is necessary to increase the capacity of the inflator that supplies gas to the airbag.

  This invention is made in view of such a point, and it aims at providing the folding method and non-occupant protection apparatus of the airbag which can move a hood rapidly with an airbag.

  The airbag folding method according to claim 1 includes a hood provided at a front portion of a vehicle, a windshield positioned behind the hood, and a pair of pillar portions that support both side portions of the windshield. A first air chamber that is folded and stored in the rear lower part of the hood of the vehicle provided, is supplied with gas, expands, and moves upward by pressing the hood, and gas is supplied from the first air chamber. An airbag folding method comprising: a second air chamber that is deployed and covers at least a portion of the pillar portion, wherein the second air chamber is disposed in both directions along a predetermined fold line. And the folded portion is accumulated on the first air chamber side.

  And in this structure, when a non-occupant collides with a vehicle, gas will be supplied to the 1st air chamber of an airbag, this 1st air chamber will expand | deploy, and a hood will be pushed and moved upwards. Next, gas is supplied from the first air chamber to the second air chamber, and the second air chamber expands to cover at least a part of the pillar portion. When a non-occupant who has collided with the front of the vehicle and collided with the hood further collides with the hood, a space required for the deformation of the hood is secured, and the shock absorption characteristics are improved. In addition, at least a part of the pillar portion is covered with the airbag, and the impact when the non-occupant collides with the pillar portion is reduced. The second air chamber of the airbag is folded back toward the inside in both sides along a predetermined fold line, and the folded portion is further accumulated and folded on the first air chamber side. Therefore, the supply of the gas supplied to the first air chamber at the initial stage of deployment is suppressed to the second air chamber, the first air chamber is rapidly deployed at the initial stage of deployment, and the hood is quickly brought to a predetermined position. By moving it, the shock absorption characteristics due to deformation of the hood are easily improved, and non-occupants are effectively protected. Further, since the second air chamber of the airbag is folded inward in the both side directions along a predetermined fold line, the second air chamber is folded in a small dimension in both side directions, and the first air chamber is sufficiently In the state where the hood is moved to a predetermined position after being unfolded, it can be smoothly unfolded from the gap below the rear end of the hood to the rear and further outward without interfering with other members. Protected.

The airbag folding method according to claim 2 is the airbag folding method according to claim 1, wherein the second air chamber is deployed along the longitudinal direction of the pillar portion, and the predetermined folding line is: It is set along the longitudinal direction of the pillar portion.

  In this configuration, the airbag can be smoothly deployed along the pillar portion, and can be folded with small dimensions in both side directions.

  The method for folding an airbag according to claim 3 is the method for folding an airbag according to claim 1 or 2, wherein the second air chamber is folded back toward the inside in both sides along a predetermined fold line. After that, the folded portion is wound from the front end side and accumulated on the first air chamber side.

  In this configuration, by winding and accumulating from the front end side, the supply of gas to the second air chamber is effectively suppressed at the initial stage of deployment of the airbag, and the first air chamber is rapidly deployed. .

  The airbag folding method according to claim 4 is the airbag folding method according to claim 3, wherein the second air chamber is configured by winding the folded portion from the tip side to the pillar portion side and accumulating. It is.

  In this configuration, when the second air chamber is deployed, it is easy to deploy the second air chamber along the pillar portion.

The non-occupant protection device according to claim 5 includes a deformable hood provided at a front portion of the vehicle, a windshield positioned behind the hood, and a pair of pillar portions that support both side portions of the windshield. The airbag according to any one of claims 1 to 4, wherein the airbag is folded and stored below a rear portion of the hood of the vehicle.
An inflator that supplies gas to the airbag, a control unit that detects a collision with a non-occupant and operates the inflator, and a support unit that supports a rear portion of the hood so as to be movable upward. .

  In this configuration, since the airbag according to any one of claims 1 to 4 is used, when a non-occupant collides with the vehicle, the hood is quickly moved to a predetermined position, and the airbag smoothly The non-occupant who covers the part and collides with the vehicle is effectively protected by the deformation of the hood and the airbag covering the pillar part.

  According to the present invention, when a non-occupant collides with a vehicle, the hood is quickly moved to a predetermined position, and the pillar portion is smoothly covered with the airbag, and the non-occupant colliding with the vehicle can It can protect effectively with the airbag which covers a part.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of an airbag folding method and a non-occupant protection device according to the present invention will be described with reference to the drawings.

  In FIGS. 1 and 2, reference numeral 1 denotes a vehicle body of a car, which is a vehicle. The vehicle body 1 includes a hood 3 that covers a front engine room 2, and a windshield that covers a vehicle room 4 located behind the engine room 2. And a cowl top cover 8 that covers the cowl portion 7 between the engine room 2 and the vehicle compartment 4 are attached to the windshield 5. A pedestrian protection device 10 which is an occupant protection device is provided. Hereinafter, directions such as forward (arrow F direction), upward (arrow U direction), and both side directions (arrow W direction) will be described with reference to the straight traveling direction of the vehicle body 1.

  The hood 3 is also called a bonnet hood or a front hood, and is provided at the front of the vehicle body 1 and formed of one or more metal plates, and constitutes a so-called pedestrian injury reducing body. And when a pedestrian collides, it is easily deformed to absorb the impact. In addition, the hood 3 is provided so as to be able to be opened and closed with a pair of support portions 12 which are hinge mechanisms provided on both side portions near the rear end portion as fulcrums, that is, rotating shafts, and during operation of the pedestrian protection device 10, Each support portion 12 supports the rear end portion of the hood 3 so as to be raised by a predetermined distance.

  The windshield 5 is supported on both sides by A pillars 14 as pillar portions, and the lower surface near the front end is supported by a cowl top panel 16 via a seal portion 15.

  Further, the cowl portion 7 is also called an air box or the like, and is provided in a bowl shape with an upper opening between the cowl top panel 16 and the vehicle body panel 17 positioned in front of the cowl top panel 16. A cowl top cover 8 is attached to cover. The cowl unit 7 is provided with a motor for driving a wiper and the like, and is connected to an air intake unit of an air conditioner. Further, the cowl top cover 8 is supported by being fitted to the windshield 5 at the rear end portion, and is supported on a support base portion 18 provided on the vehicle body panel 17.

  The pedestrian protection device 10 is a so-called pedestrian protection airbag device, and includes a bag-like airbag 21 that is folded and stored in a cowl portion 7 below the rear end portion of the hood 3 on the front side of the vehicle body 1. ing. Then, by supplying gas to the airbag 21 and deploying it, the rear end of the hood 3 is lifted to secure a deformation area below the hood 3, improving the shock absorption characteristics of the hood 3 and deploying. The airbag 21 covers at least a part of the upper surface of the cowl portion 7 and the front surface of the A pillar 14. That is, the pedestrian protection device 10 includes an airbag 21, an inflator 22 that supplies gas to the airbag 21, a retainer 24 that fixes the airbag 21 and the inflator 22, and a case 25 that houses these members. And a control device (not shown).

  As shown in FIGS. 1 to 5, the airbag 21 is formed in a bag shape having outer shells formed by stitching the outer peripheral portions of two base fabrics together with an outer peripheral suture line 31. The extending base portion 33 and the projecting portion 34 projecting from both ends of the base portion 33 form a substantially U shape. Further, inside the outer shell, along the longitudinal direction of the base portion 33, a partition wall portion 36 formed by the base fabric is sewn to each base fabric constituting the outer shell by an inner suture line 37. Further, in the vicinity of both end portions of the partition wall portion 36, a communication portion 38 which is a ventilation portion having a circular hole shape or the like is formed. The partition wall 36 allows the base 33 inside the airbag 21 in the present embodiment to be substantially airtight to the first air chamber 41 and the second air chamber 42 except for the communication portion 38. It is partitioned. In other words, the first air chamber 41 and the second air chamber 42 are formed to communicate with each other only through the communication portion 38.

  The first air chamber 41 is a front air chamber that is at least partially positioned below the hood 3 when deployed, and a hood pushing portion 43 that pushes up the hood 3 and a hood pushing portion 43 behind the hood pushing portion 43. The first air chamber 41 accommodates the inflator 22 and the retainer 24 in pairs on both sides. Further, the first air chamber 41 as a whole is formed so that the dimension in the front-rear direction is substantially constant and the both side directions are in the longitudinal direction. It is formed as an inclined surface 45 that expands toward the surface. That is, as shown in FIG. 2, in the portion where the gas G flows from the first air chamber 41 to the second air chamber 42, the angle θ formed between the front side of the first air chamber 41 and the inclined surface 45 , Larger than the right angle (θ> 90). That is, the dimension in both directions is expanded from the hood pushing portion 43 toward the cowl covering portion 44, and the width dimension of the cowl covering portion 44 of the first air chamber 41 is formed larger than the hood pushing portion 43. Yes. Further, the inclined surface 45 is smoothly continuous with both sides of the second air chamber 42 so that the width dimension of the second air chamber 42 is larger than the cowl covering portion 44 of the first air chamber 41. Is formed. The second air chamber 42 is a rear air chamber located on the rear side of the first air chamber 41, and includes a pillar covering portion 46 constituted by each projecting portion 34 and an upper portion of the base portion 33. And a cowl covering portion 47. Moreover, although not shown in figure, the reinforcement cloth called a flameproof cloth etc. is piled up and sewed on these base fabrics as needed.

  Each inflator 22 is a gas generator, and as shown in FIG. 2, includes a substantially cylindrical main body 22a and a gas injection part 22b on one end side of the main body 22a. The inflator 22 is supplied with an ignition signal to a connector (not shown) to react the propellant filled inside, or to release the gas stored in the internal cylinder, etc. Gas is injected from a plurality of holes provided on the peripheral surface. In this embodiment, the two inflators 22 are arranged so that the gas injection portions 22b face opposite sides.

  The retainer 24 is an inflator fixture including a retainer main body 49 formed by bending a metal plate and a bolt 50 fixed to the retainer main body 49. The retainer main body 49 fixes the inflator 22 and guides the gas injected from the gas injection unit 22b. As shown in FIG. 1, a nut 51 is screwed onto the bolt 50.

  Further, the case 25 includes a case main body portion 54 that has a groove shape with an upper opening, and a lid portion 55 that covers the upper opening of the case main body portion 54. In the present embodiment, the case main body 54 is formed integrally with the cowl top cover 8. On the other hand, the lid portion 55 is separate from the cowl top cover 8 and has a tear line 56 as a breakable breakable portion that is a weak portion along the longitudinal direction.

  Further, the connector of each inflator 22 is connected to a control device (not shown) via a harness. The control device includes a CPU and the like, and includes a plurality of sensors as detection means, detects a collision between the pedestrian and the vehicle body 1, and operates each inflator 22.

  Further, the support portion 12 is located on both sides of the case 25, that is, on both sides of the airbag 21 that is folded and stored, and connects the vehicle body panel 17 side and the vicinity of the rear end portion of the hood 3. And each support part 12, for example, while connecting one end of the link shaft of two elongate metal plates so that rotation is possible at a shaft part, the other end of one link shaft is connected to the body panel 17 side, The other end of the other link shaft is connected to the hood 3 side. When the normal hood 3 is opened and closed, the shaft portion of the support portion 12 serves as a rotation shaft, and the front end portion of the hood 3 rotates upward. On the other hand, when the pedestrian protection device 10 is activated and an upward force is applied to the rear end portion of the hood 3, the shaft portion rotates and the other end of each link shaft rotates as a rotation shaft, The rear end portion of the hood 3 is moved upward by a predetermined dimension, for example, about 5 cm, and can be rotated about the front end side as a fulcrum.

  Then, the assembly process of the pedestrian protection device 10 is performed by inserting an assembly in which the inflator 22 and the retainer 24 are combined into the first air chamber 41 of the airbag 21 and attaching the bolt 50 of the retainer 24 to the airbag 21. After being pulled out, the airbag 21 is folded into a predetermined shape as will be described later. Then, the folded airbag 21 is inserted into the case main body 54, and the bolt 50 is passed through the cowl top cover 8 and the support base 18 of the vehicle body panel 17, so that the nut 51 extends from the lower side of the support base 18 to the bolt 50. Screw in and tighten. Then, the retainer 24 fixes the front end of the airbag 21 and the inflator 22 together with the cowl top cover 8 to the support base portion 18 of the vehicle body panel 17. Then, the upper opening of the case body 54 is covered, the lid 55 is attached, and the inflator 22 and the control device are electrically connected by a harness, thereby protecting the pedestrian as shown in FIG. A device 10 is configured.

  Next, the folded state and folding process of the airbag 21 will be described.

  In the folded state, as shown in FIGS. 1 (a) and 5, the airbag 21 basically has a first air chamber 41 and a second air chamber 42 folded separately, After the first air chamber 41 is expanded, the second air chamber 42 is expanded. Then, in the folding step of the second air chamber 42, first, as shown in FIGS. 3A and 3B, the pillar covering portions 46 on both sides are removed from the state in which the airbag 21 is spread on a plane. It folds once along the predetermined folding line A inward in the both-side direction W. Here, the predetermined fold line A is a line along the longitudinal direction of the A pillar 14 at the time of deployment, and further, in the present embodiment, is a line along substantially the center of the pillar covering portion 46 in the width direction. The inclined line is slightly expanded toward the upper side with respect to both side directions W. Then, the folded portions of the pillar covering portions 46 on both sides are wound, and the second air chamber 42 is folded as a roll-shaped accumulation portion 57 as shown in FIGS. 3 (b) and 3 (c). In addition, the winding direction is a direction in which the tip portion which is the upper end portion is wound around the A pillar 14 side, that is, the lower side, and the A pillar 14 is rubbed when the stacking portion 57 is rewound during deployment. It is in a direction to rotate. Next, as shown in FIG. 5, the upper and lower arms 58 and 59 are formed by simply expanding the first air chamber 41 so that the bag is flattened, and the arms 58 and 59 are placed along the stacking portion 57. Fold it in a so-called alligator shape. In other words, the first air chamber 41 is folded with a small expansion resistance with respect to the second air chamber 42, and the first air chamber 41 is folded so as to be rapidly deployable from the second air chamber 42. ing. And in the state folded in this way, shape is hold | maintained with the wrapping member etc. which are not shown in figure, and a folding process is complete | finished.

  Next, the operation of the pedestrian protection device 10 will be described.

  First, as shown in FIG. 1A, when the control device detects a collision between the front portion of the vehicle body 1 and a pedestrian in a state where the folded airbag 21 is stored in the case 25, the control device Electric power is supplied to activate the inflator 22. Then, the inflator 22 supplies the gas G from the gas injection unit 22b to the first air chamber 41. At this time, the airbag 21 is folded so that the first air chamber 41 can be quickly deployed from the second air chamber 42, and the first air chamber 41 and the second air chamber 42 are separated by the partition wall 36. The first air chamber 41 and the second air chamber 42 communicate with each other only through the communication portion 38 having a large ventilation resistance. As shown in (b), the gas G supplied from the inflator 22 stays in the first air chamber 41, and the first air chamber 41 is developed quickly and reliably. Then, the rear end portion of the hood 3 is pushed up by a predetermined dimension by the pressure of the development. In this state, a gap is secured between the hood 3 and the member in the engine room 2 by the hood pushing portion 43 of the first air chamber 41, and the cowl covering portion 44 of the first air chamber 41 is used for the cowl. Part of the part 7 is covered.

  Further, in a state where the first air chamber 41 is sufficiently expanded, the gas G is supplied from the first air chamber 41 to the second air chamber 42 through the communication portions 38 provided in the vicinity of both end portions in both sides. As shown in FIGS. 1B and 1C, the accumulating portion 57 is unwound while rotating so as to rub the A-pillar 14, and further expanded outward from the fold line A, so that the second air The pillar covering portion 46 and the cowl covering portion 47 of the chamber 42 are developed. The pillar covering portion 46 covers part or all of the A pillar 14, and the cowl covering portion 47 covers the wiper of the cowl portion 7, the lower end portion of the windshield 5, and the like.

  That is, in the airbag 21, the hood pushing portion 43 of the first air chamber 41 is positioned between the support portions 12 on both sides, and the cowl covering portion 44 and the second air chamber 42 of the first air chamber 41 are located. Is deployed behind the first air chamber 41 and bulges laterally from the support portion 12.

  In this state, when a pedestrian who is lifted up collides with the hood 3, the hood 3 is deformed with a sufficient stroke, exhibits a predetermined shock absorption characteristic, and alleviates the impact on the pedestrian. Further, the A pillar 14 and the uneven members of the cowl portion 7 are covered by the second air chamber 42, so that collision between these members and the pedestrian is avoided, and the pedestrian is protected.

  Thus, according to the present embodiment, in the so-called pedestrian protection airbag (pedestrian airbag) disposed in the cowl portion 7 of the automobile, the folding method of the airbag 21 that is folded and stored is as follows. First, the pillar covering portion 46 of the second air chamber 42 located on the rear side is folded back toward the inside of the vehicle body 1 along a predetermined fold line A so as to reduce the width, and thereafter, from the front end portion of the pillar covering portion 46 The first hood 41 is wound up to the upper end portion of the hood pushing portion 43 and folded, and the hood pushing portion 43 has a folding shape that has a smaller deployment resistance than the pillar covering portion 46 and is easy to deploy. Therefore, by supplying gas from the inflator 22 to the hood pushing portion 43, the movement toward the rear and outside in the initial stage of deployment is suppressed, and the pressure at the initial stage of deployment is applied to the hood pushing section 43 adapted to the width of the hood 3. The hood pusher 43 can be quickly deployed and the hood 3 can be quickly lifted by the airbag 21 with sufficient pressure.

  Further, a plurality of air chambers are provided by providing a partition without forming the inside of the airbag 21 as a single air chamber. In the present embodiment, a partition wall 36 is provided inside the air bag 21, and the hood 3 is provided. Since the first air chamber 41 to be lifted and the second air chamber 42 covering the cowl portion 7 including the A pillar 14 and the lower end portion of the windshield 5 are partitioned, the air bag 21 quickly removes the hood 3 with sufficient pressure. As the air is lifted, the gas is less likely to return from the second air chamber 42 to the first air chamber 41, and the position of the lifted hood 3 can be stably held by the airbag 21 that holds the pressure. Bounce can be suppressed.

  Furthermore, since the hood 3 can be lifted quickly and stably, a stable gap can be secured between the rear end of the hood 3 and the cowl top cover 8 below the hood 3, that is, the hood 3 can be lifted sufficiently. The pillar covering portion 46 of the second air chamber 42 is rapidly and smoothly expanded from the gap below the formed hood 3 without interfering with surrounding members, and the lower ends of the A pillar 14 and the windshield 5 The cowl part 7 containing can be covered.

  Further, the pillar covering portion 46 of the second air chamber 42 can be folded at a small dimension in the both-side direction W by folding back from the fold line A along the longitudinal direction of the A pillar 14 and winding from the front end side. The A pillar 14 can be unfolded so as to roll back along the longitudinal direction. Further, the pillar covering portion 46 of the second air chamber 42 is wound so that the tip portion, which is the upper end portion, is wound around the A pillar 14 side, that is, the lower side, so that the A pillar 14 and the front are rubbed. It can be developed very close to the glass 5.

  Further, the hood pushing portion 43 of the first air chamber 41 is developed in a space having a relatively small dimension in the both-side direction W between the support portions 12 on both sides, and the cowl covering portion 44 of the first air chamber 41. The second air chamber 42 is developed in a space having a dimension in the both-side direction W larger than that of the hood pushing portion 43, but the side portion of the first air chamber 41 is inclined to expand outward toward the rear. Since the surface 45 is used, the gas smoothly flows in the first air chamber 41 and from the first air chamber 41 to the second air chamber 42, and the support portion 12 does not interfere with the deployment of the airbag 21. The part outside 12 can be smoothly and quickly deployed.

  In the above embodiment, the hood pushing portion 43 of the first air chamber 41 is folded in a so-called alligator shape, but is not limited to this configuration, and can be folded in a bellows shape, for example. For example, as shown in FIG. 6, the hood pushing portion 43 is folded in a bellows shape and placed on the hood pushing portion 43 so that the pillar covering portion 46 of the second air chamber 42 folded in a roll shape is formed. Can be arranged.

  Further, in the above-described embodiment, the pillar covering portion 46 of the second air chamber 42 is folded once along the predetermined fold line A along the longitudinal direction of the A pillar 14, but along the plurality of fold lines. Folding, the width dimension can be reduced, or the development resistance can be increased. For example, as shown in FIG. 7, a first fold line A1 and a second fold line A2 are respectively set on the pillar covering portions 46 on both sides, and as shown in FIGS. 7 (a) and (b), After folding back along the first folding line A1, as shown in FIGS. 7B and 7C, the folded portion can be folded outward. Then, from the state shown in FIG. 7C, the pillar covering portion 46 can be folded into a roll shape or the like as in the above embodiment.

  In addition to setting the folding line A along the longitudinal direction of the A pillar 14, the folding line A can also be set by shifting the position. Further, for example, as shown in FIG. 8, the folding line B can be set at the inner side of the pillar covering portion 46 of the second air chamber 42, that is, the protruding portion 34.

  Further, in the above embodiment, the pillar covering portion 46 of the second air chamber 42 is wound so that the tip portion which is the upper end portion is wound around the A pillar 14 side, that is, the lower side. It is also possible to wind the tip portion so that it is wound from the anti-A pillar 14 side, that is, from the upper side to the front side. In this configuration, the pillar covering portion 46 can be rapidly deployed so as to roll on the A pillar 14.

  Further, in the above-described embodiment, each protruding portion 34, that is, each pillar covering portion 46 is inclined in the direction in which the distal end side is expanded in a state where the airbag 21 is spread on a plane. However, it is not limited to this, and it may be arranged substantially perpendicular to the base portion 41, or may be inclined in a direction in which the tip sides are slightly closer to each other. Further, in the present embodiment, the communication portion 38 is configured by a plurality of circular holes formed in the partition wall portion 36, and each of the circular holes is directed to the pillar covering portion 46 and the other is directed to the cowl covering portion 47. However, other shapes such as a slit shape can be adopted.

  Further, in the above embodiment, the partition wall portion 36 is basically configured by arranging a single base fabric over the entire length along the side direction W at the intermediate position in the front-rear direction of the base portion 33. The configuration is not limited to the above, and a plurality of base fabrics may be used, or partition walls 36 may be provided at boundary portions between the base portion 33 and the plurality of projecting portions 34, respectively. Moreover, the partition part 36 between the 1st air chamber 41 and the 2nd air chamber can also be abbreviate | omitted. Furthermore, a gas guiding means for guiding the gas flow can be provided in the air chamber in the airbag 21, so that desired deployment characteristics can be realized.

  The present invention can be applied to a vehicle having a hood at the front.

It is explanatory drawing which shows one Embodiment of the non-occupant protection apparatus of this invention, (a) is before deployment of an airbag, (b) is the deployment initial stage of an airbag, (c) is in the state following (b). is there. It is explanatory drawing of a non-occupant protection apparatus same as the above. It is explanatory drawing of the folding method of an airbag same as the above. It is explanatory drawing of the II equivalent position of FIG. 3 of a non-occupant protection apparatus same as the above. It is explanatory drawing of a non-occupant protection apparatus same as the above. It is explanatory drawing which shows other embodiment of the non-occupant protection apparatus of this invention. It is explanatory drawing which shows other embodiment of the folding method of the airbag of this invention. It is explanatory drawing which shows other embodiment of the folding method of the airbag of this invention.

Explanation of symbols

3 Hood 5 Windshield as windshield
10 Pedestrian protection device as non-occupant protection device
12 Support section
14 A-pillar as pillar
21 airbag
22 Inflator
41 First air chamber
42 Second air chamber A Fold line

Claims (5)

A hood provided at the front of the vehicle, a windshield positioned behind the hood, and a pair of pillars that support both sides of the windshield are folded and stored below the rear of the hood of the vehicle. A first air chamber that is supplied with gas and expands, presses the hood and moves upward, and a gas is supplied from the first air chamber to expand, and at least a part of the pillar portion is expanded. An airbag folding method comprising a second air chamber covering,
The airbag folding method, wherein the second air chamber is folded inward in both sides along a predetermined folding line, and the folded portion is accumulated on the first air chamber side. . 2. The airbag folding according to claim 1, wherein the second air chamber is deployed along the longitudinal direction of the pillar portion, and the predetermined fold line is set along the longitudinal direction of the pillar portion. Method. The second air chamber is folded back inward in both directions along a predetermined fold line, and then the folded portion is wound from the tip side and accumulated on the first air chamber side. The airbag folding method according to claim 1 or 2. The airbag folding method according to claim 3, wherein the second air chamber is configured by winding and folding the folded portion from the tip side to the pillar portion side. Below the rear of the hood of the vehicle, comprising a deformable hood provided at the front of the vehicle, a windshield positioned behind the hood, and a pair of pillars supporting both sides of the windshield The airbag according to any one of claims 1 to 4, wherein the airbag is folded and stored;
An inflator for supplying gas to the airbag;
Control means for detecting a collision with a non-occupant and operating the inflator;
A non-occupant protection device comprising: a support portion that supports a rear portion of the hood so as to be movable upward.

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