JP2006273133A - Air bag device for pedestrian - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air bag device for a pedestrian capable of reducing the capacity of an air bag in completion of expansion and preventing the intrusion of the pedestrian to the lower surface side of the air bag in completion of expansion. <P>SOLUTION: The air bag 10 is stored on the lower surface side of a car body 1 on the front side of a front wheel 6 of a vehicle V, projected from a storage portion 32 free to prevent dragging-in of the pedestrian from the front side when gas G for expansion flows in and expands so as to block a part between a lower surface of a front end part 1a of a car body 1 and a road surface GL by making the side of lower ends 17b, 18b contact with the road surface GL on this air bag device S for the pedestrian. A bag type peripheral wall 12 of the air bag 10 is furnished with a front wall part 17 and a rear wall part 18 so as to be separated from each other in the longitudinal direction. The front wall part 17 and the rear wall part 18 are connected to each other by a tether 20 free to regulate thickness dimensions L1 in the longitudinal direction in completion of expansion of the air bag 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is mounted on the lower surface side of the vehicle body on the front side of the front wheel of the vehicle and accommodates an inflatable airbag so that it can be prevented from being caught from the front side of the pedestrian during operation. It is related with the airbag apparatus for pedestrians of the structure which arrange | positions the inflated airbag between.

  Conventionally, in a pedestrian airbag device mounted on a vehicle, the airbag is folded and stored in a bumper or the like at the front end of the vehicle body, and when in operation, an inflation gas is caused to flow into the airbag to store the airbag. It is made to protrude from the front side of the vehicle body (see, for example, Patent Documents 1 and 2).

In some cases, an inflated airbag is disposed between the vehicle body and the road surface (see, for example, Patent Document 3).
JP-A-6-239198 JP-A-9-164906 JP 7-277114 A

  However, in the conventional pedestrian airbag device in which the inflated airbag is disposed on the front side of the vehicle body, the inflated airbag is separated from the road surface so that the lower surface of the inflated airbag is lifted, and there is a gap between the airbag and the road surface. If this occurs, there is a risk that a pedestrian who has fallen may enter the vehicle body from the gap. Therefore, in order to prevent the pedestrian from getting caught on the lower surface side (front wheel side) of the front end of the vehicle body, There was room.

  In order to deal with this problem, as described in Patent Document 3, it is conceivable that a configuration in which an inflated airbag is disposed between the vehicle body lower surface on the rear wheel side and the road surface is made to correspond to the front wheel side.

  However, even if it is configured such that an inflated airbag is disposed between the lower surface of the front end portion of the vehicle body and the road surface, the gap between the front end portion of the vehicle body and the road surface is large in a truck or the like equipped with a large tire. The volume of the airbag for closing the gap is inevitably large, and it is necessary to use a large output as an inflator for supplying inflation gas to the airbag. Will increase the weight and cost.

  In addition, when using a large-sized airbag so as to block a large gap between the front end of the vehicle body and the road surface, the longitudinal cross-sectional shape of the airbag in the front-rear direction when the inflation is completed becomes a large, substantially circular shape. A triangular space that expands to the front side is generated between the lower end portion on the front side of the airbag and the road surface so as to be tangent to the circular airbag. And, even if the lower end of the inflated airbag is in contact with the road surface, the triangular space is between the lower surface side near the front end of the airbag and the road surface if the airbag is substantially circular with a large diameter. It grows big. And from the triangular space, a pedestrian may invade into the lower surface side of the airbag and may approach the front wheel side.

  The present invention solves the above-described problems, and can reduce the volume of the airbag when inflation is completed, and can prevent a pedestrian from entering the lower surface of the airbag when inflation is completed. An object is to provide an apparatus.

In the airbag device for a walking vehicle according to the present invention, the airbag is stored on the lower surface side of the vehicle body on the front side of the front wheel of the vehicle, and can be prevented from being caught from the front side of the pedestrian when inflating gas flows. An airbag device that protrudes from the airbag and inflates so as to close the space between the lower surface of the front end of the vehicle body and the road surface, with the lower end side in contact with the road surface,
The airbag-shaped peripheral wall of the airbag is configured to include a front wall portion and a rear wall portion that swell away from each other in the front-rear direction,
The front wall portion and the rear wall portion are connected by connecting means so that the thickness dimension in the front-rear direction when the airbag is completely inflated can be regulated.

  In the pedestrian airbag device according to the present invention, when the airbag protrudes from the storage portion and completes the inflation when activated, the airbag is moved in the front-rear direction between the front wall portion and the rear wall portion by the connecting means. Since the thickness dimension is regulated and the lower end side is brought into contact with the road surface, in the longitudinal section in the front-rear direction, the vicinity of the front and rear edges on the lower end side has an arc shape, but it expands into a substantially rectangular shape. . Therefore, in the longitudinal section in the front-rear direction, the front wall portion of the airbag swells in a substantially semicircular arc shape in the absence of the connecting means, but in the airbag of the present invention, the lower surface side near the front end portion ( The front edge side of the lower end in contact with the road surface of the airbag becomes an arc shape of about a quarter of a circle with a small diameter, and a triangular space between the lower surface near the front end of the airbag and the road surface is formed. Even if a pedestrian tries to enter the lower surface side of the airbag, it can be made as small as possible, and the triangular space is small and walking on the lower end side of the front wall portion of the airbag arranged in a substantially vertical direction. It becomes possible to prevent an intruder from entering.

  In the airbag according to the present invention, since the thickness dimension in the front-rear direction of the front wall portion and the rear wall portion is regulated by the connecting means, and the volume can be reduced, the inflator for supplying the inflation gas As a result, it is not necessary to use a device with a large output, and conversely, even if a small output inflator is used, the internal pressure of the airbag can be increased, and a pedestrian with a large kinetic energy can Even if it is going to invade from the lower surface side, the airbag can catch the pedestrian and prevent it from being caught on the front wheel side without moving to the rear side.

  Therefore, in the pedestrian airbag device according to the present invention, the volume of the airbag when inflation is completed can be reduced, and pedestrians can be prevented from entering the lower surface of the airbag when inflation is completed. it can.

  Furthermore, in the airbag according to the present invention, the thickness of the front wall portion and the rear wall portion in the front-rear direction is regulated by the connecting means, so that the front wall portion of the airbag when the inflation is completed is directed to the front side. Since the amount of protrusion can be reduced, even if the airbag device is mounted on the lower surface of the front edge of the front end of the vehicle body as much as possible, the front wall portion of the airbag at the completion of inflation unnecessarily protrudes forward from the vehicle body. Can be prevented.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. A pedestrian airbag apparatus S according to the embodiment is mounted on a truck V as a vehicle, as shown in FIGS. It is mounted on the lower surface side of the front end 1a of the vehicle body (body) 1 on the front side of the front wheels 6,6. These front wheels 6 and 6 are disposed so that they can be braked and steered. 1 and 2 are a front bumper, and a member 8 is a spoiler. These members are attached to the frame 2 on the body 1 side using a bracket (not shown). .

  Further, the front-rear, up-down, left-right directions in this specification are made to correspond to the front-rear, up-down, left-right directions of the vehicle V, with the straight direction of the vehicle V being the forward direction. Yes.

  1 to 7, the pedestrian airbag device S includes an airbag 10, an inflator 42 that supplies inflation gas to the airbag 10, and a case 32 that stores and holds the folded airbag 10 and the inflator 42. And the cover 40 which covers the lower surface side of the folded airbag 10 is comprised.

  Note that the frame 2 of the vehicle V is formed of two parallel rigid metal members disposed along the front-rear direction at the connection portion of the airbag apparatus S, and each of the cases of the airbag apparatus S. 32 is fixed to the bolt 4 and the nut 3 to fix the airbag device S.

  The pedestrian airbag device S has a sensor (not shown) for detecting the approach of the pedestrian disposed at a predetermined position of the bumper 7, and a control device (not shown) to which a signal from the sensor is input is provided by the pedestrian. When a collision with the vehicle V is predicted, the inflator 42 is operated to supply the inflation gas to the airbag 10.

  In the case of the embodiment, a plurality (three in the embodiment) of inflators 42 are used and arranged along the left-right direction. Each inflator 42 includes a columnar main body portion 42a having a plurality of gas discharge ports 42b on the lower end side, and a substantially square plate-like flange portion 42c projects from the outer peripheral surface of the main body portion 42a. Each flange portion 42c is formed with an attachment hole 42d through which each bolt 26a of the retainer 26 is inserted at each of the four corners.

  The case 32 is made of a box-shaped sheet metal having an opening at the bottom, a ceiling wall portion 33 disposed substantially in the horizontal direction, and a cylindrical side wall extending downward from the entire outer periphery of the ceiling wall portion 33. And a unit 38. The opening on the lower surface side of the case 32 surrounded by the side wall portion 38 is a projecting opening 32a from which the airbag 10 is inflated.

  The planar shape of the ceiling wall 33 includes a rectangular central portion 33a extending in the left-right direction, and rectangular left and right side portions 33b and 33c extending diagonally rearward from the left and right sides of the central portion 33a. It is prepared for. A connecting hole 37 penetrating in the vertical direction is disposed in front of and behind the boundary between the left and right side portions 33b and 33c in the central portion 33a. Bolts 4 for connecting and fixing the case 32 to the frame 2 are inserted through these connection holes 37.

  In addition, a plurality of (three in the case of the embodiment) insertion holes 34 that are opened in a circular shape are arranged in the center portion 33a of the ceiling wall portion 33 along the left-right direction. A cylindrical main body 42a of the inflator 42 is inserted into each insertion hole 34 from above. At the periphery of each insertion hole 34, four mounting holes 35 are vertically penetrated. Each inflator 42 is attached to these attachment holes 35 from the upper surface side of the ceiling wall portion 33, and the attachment wall portion 13 of the airbag 10 having the opening 14 is attached from the lower surface side of the ceiling wall portion 33. Each bolt 26a of the retainer 26 is inserted.

  Each retainer 26 is configured as a substantially square ring having a hole through which the main body 42a of the inflator 42 can be inserted, and is provided with bolts 26a extending upward at the four corners. And the retainer 26 fixes the mounting wall part 13 and the inflator 42 of the airbag 10 to the ceiling wall part 33 as mentioned above using the volt | bolt 26a and the nut 27 fastened to the volt | bolt 26a. Playing a role.

  Further, a plurality of attachment holes 36 for fixing the attachment reinforcing portion 16 of the airbag 10 to the lower surface side of the ceiling wall portion 33 are formed on the front edge side of the ceiling wall portion 33. Bolts 29 are inserted into the respective mounting holes 36 together with the respective mounting holes 16a of the mounting reinforcing portion 16, and the nuts 30 are fastened to the bolts 29, so that the mounting reinforcing portion 16 of the airbag 10 becomes the airbag. It is attached and fixed to the ceiling wall 33 in a state of being arranged at a position on the front side from the attachment hole 15F on the front edge side of the ten openings 14.

  The reason why the attachment reinforcing portion 16 of the airbag 10 is attached and fixed to the ceiling wall portion 33 in a state where the attachment reinforcing portion 16 is arranged at a position on the front side from the attachment hole 15F on the front edge side of each opening 14 of the airbag 10 is as follows. This is to prevent gas leakage from the periphery of the opening 14 when the airbag device S is in operation. That is, as shown in FIG. 10, when the airbag 10 that has been inflated has its lower ends 17b and 18b in contact with the road surface GL and the track V is moving forward in this state, the airbag 10 Due to the frictional resistance with GL, the lower ends 17b and 18b are pulled rearward. At this time, if there is no attachment reinforcing portion 16 as an attachment portion to the ceiling wall portion 33, a tensile force T toward the rear side of the airbag 10 is obtained. (Refer to FIG. 10) directly acts on the peripheral portion of the mounting hole 15F on the front edge side of the opening 14 of the mounting wall 13 and breaks or stretches the portion to cause gas leakage from the vicinity of the mounting hole 15F. There is a risk of causing it. However, if the attachment portion to the ceiling wall portion 33 of the airbag 10, that is, the attachment reinforcing portion 16 is disposed on the front side of each attachment hole 15 </ b> F, the rear side due to the frictional resistance with the road surface GL in the airbag 10. The attachment reinforcing portion 16 secured by the bolt 29 can counter the tensile force T to the side, and gas leakage from the vicinity of the attachment hole 15F can be prevented. Of course, the attachment reinforcing portion 16 itself is not a part that inflates when inflating gas is introduced, so that no gas leakage occurs even if the peripheral edge of the attachment hole 16a extends or breaks.

  Incidentally, such a tensile force T that pulls the front edge side of the opening 14 of the airbag 10 rearward also interferes with a pedestrian after the airbag 10 is completely inflated, even when the front wall portion 17 of the airbag 10 is engaged. This can occur because tension is generated on the surface of the film.

  Further, a flange portion 38a that extends outward in a substantially horizontal direction is formed at the lower end of the side wall portion 38 of the case 32, and a fixing means such as a clip or a bolt (not shown) is used for the flange portion 38a. The cover 40 is fixed.

  The cover 40 is formed of a synthetic resin or the like, and is disposed so as to cover the projecting opening 32a surrounded by the side wall portion 38 on the lower end side of the case 32, and the airbag 10 accommodated in the case 32 is disposed below. In order to be able to expand and protrude toward the road surface GL side, the airbag 10 is pushed and broken, and is disposed so as to open on both sides in the front-rear direction. In addition, you may comprise the cover 40 so that it may be opened by one opening not only on both sides but on the back side or the front side.

  As shown in FIGS. 7 to 10, the airbag 10 includes a main body 11 that inflates when inflated, and a tether 20 as a connecting means disposed in the main body 11.

  The bag-like peripheral wall 12 of the main body 11 covers the front side of the left and right front wheels 6 and 6 of the track V when expansion is completed, and closes the region from the lower surface side of the vehicle body front end 1a to the road surface GL. It is configured as a substantially quadrangular prism shape extending substantially along the direction. More specifically, when the airbag 10 at the completion of the inflation is viewed from above, the main body 11 has a slightly larger outer shape than the ceiling wall 33 of the case 32 so as to be substantially similar to the ceiling wall 33. The central portion 11a extends in the left-right direction, and the left and right side portions 11b and 11c extend diagonally rearward from the left and right sides of the central portion 11a (see FIG. 4).

  And the surrounding wall 12 of the main-body part 11 is made into the longitudinal cross-sectional shape along the front-back direction at the time of expansion completion, the attachment wall part 13 attached to the lower surface side of the ceiling wall part 33 of the case 32, and the front edge side of the attachment wall part 13 A front wall portion 17 extending downward from the rear wall portion 18 and a rear wall portion 18 extending downward from the rear edge side of the mounting wall portion 13 so that the lower ends 17b and 18b of the front and rear wall portions 17 and 18 are in contact with the road surface GL. And are connected to each other.

  A plurality (three in the embodiment) of gas inflow openings 14 are formed in the mounting wall 13 so that the main body 42a of each inflator 42 can be inserted, and each retainer is provided at the periphery of each opening 14. Four mounting holes 15 through which the 26 bolts 26a are inserted are vertically penetrated. Further, on the front edge side of the mounting wall portion 13, there is disposed a mounting reinforcing portion 16 that protrudes forward and extends along the left-right direction and has a plurality of mounting holes 16 a.

  The airbag 10 according to the embodiment is a coupling type airbag that is formed by joining the outer peripheral edges of a predetermined cloth material using sewing or the like, and further, the coupling portion does not contact the road surface GL. ,It is configured. That is, the constituent material of the bag-shaped peripheral wall 12 of the main body 11 is formed of two cloth materials 12a and 12b woven using polyester yarn, polyamide yarn or the like. These cloth materials 12a and 12b are arranged in an up-and-down shape in substantially the same shape, and the outer peripheral edges of the upper cloth material 12a and the lower cloth material 12b are joined using stitching or adhesion, etc. Part 11 is formed. And the part 12d of the front edge side of the peripheral part 12c used as the mutual allowance for the upper and lower fabrics 12a and 12b constitutes the attachment reinforcing part 16, and the attachment reinforcing part 16 has the same as described above. An attachment hole 16a through which the bolt 29 is inserted is formed so as to be attached to the case ceiling wall portion 33. And the opening for gas inflow which inserts the main-body part 42a of each inflator 42 toward the front edge part 12d side of the upper cloth 12a so that the rear edge side of the peripheral part 12c may not contact the road surface GL when the expansion is completed. 14 is formed, and a mounting hole 15 is formed around the opening 14.

  The tether 20 as the connecting means has a thickness L1 in the front-rear direction of both the front wall portion 17 and the rear wall portion 18 when the inflation of the airbag 10 is completed. The front and rear wall portions 17 and 18 are partially connected substantially along the front-rear direction so as to have a shorter distance than the length L0. In the case of the embodiment, it is arranged at a plurality of locations along the left-right direction of the main body 11 (in the case of the embodiment, six locations as viewed from above). Each tether 20 has a belt-like shape formed by connecting two cloth materials 21 and 22 woven from polyester yarn, polyamide yarn or the like. Then, the tether 20 joins the cloth materials 21 and 22 to the upper cloth 12a and the lower cloth 12b in advance by using stitching, adhesion, etc. When the bag-like main body portion 11 is formed by bonding the peripheral edges, the cloth materials 21 and 22 are bonded to each other using sewing, adhesion, or the like.

  The tethers 20 disposed near the left and right ends of the main body 11 are respectively arranged with the upper and lower ends 17a and 18a and the lower ends 17b and 18b of the front and upper wall portions 17 and 18 with the band-like width direction arranged in the vertical direction. The tethers 20 are arranged one by one at a substantially central portion between the upper and lower ends 17a of the front and upper wall portions 17 and 18, with the width direction of the belts arranged in the horizontal direction. Two upper and lower stages are arranged in the vicinity of the approximate middle between 18a, 17b and 18b.

  Further, the connecting positions of the tethers 20 to the front and rear wall parts 17 and 18 and the regulating distances in the front-rear direction (thickness direction) of the wall parts 17 and 18 are the lower end 17b of the front and rear wall parts 17 and 18. When the airbag 10 completes inflating so that the air pressure 18b is brought into pressure contact with the road surface GL, the internal pressure of the airbag 10 (main body portion 11) does not affect the operation of steering and braking of the front wheels 6 and 6. It is set to be.

  In the pedestrian airbag device S of this embodiment, when a collision with the pedestrian on the track V is predicted, a control device (not shown) outputs an operation signal to the inflator 42, and thus the gas discharge port 42 b of the inflator 42. The expansion gas G is discharged from Therefore, the airbag 10 accommodated in the case 32 is inflated as shown by the two-dot chain line in FIGS. 1, 2, 4 and 5 and the solid line in FIG. It protrudes downward from the opening 32a, completes expansion, closes the space between the road surface GL and the lower surface of the front end 1a of the vehicle body 1 on the front side of the front wheels 6 and 6, and presses the lower ends 17b and 18b to the road surface GL. Will be allowed to.

  In the pedestrian airbag device S of the embodiment, the airbag 10 that has been inflated is regulated by the tether 20 in the thickness dimension L1 in the front-rear direction between the front wall portion 17 and the rear wall portion 18. Since the lower ends 17b and 18b are brought into contact with the road surface GL, in the longitudinal section in the front-rear direction, the vicinity of the front and rear edges on the lower ends 17b and 18b is formed in an arc shape, but it expands into a substantially rectangular shape. . Therefore, in the longitudinal section in the front-rear direction, in the state where the tether 20 is not present, the front wall portion 17 of the airbag 10 swells in a substantially semicircular arc as shown by the two-dot chain line in FIGS. In the airbag 10 of the embodiment, the lower surface side in the vicinity of the front end portion 11d (the front edge side 17c of the lower end 17b that contacts the road surface GL of the airbag 10) is a substantially arc shape of a quarter of a circle having a small diameter D1. Thus, the triangular space TS1 between the lower surface side 17c near the front end 11d of the airbag 10 and the road surface GL can be made as small as possible compared to the triangular space TS0 without the tether 20. Even if a pedestrian tries to enter the lower surface 10a side of the airbag 10 (the lower end side 17b of the main body 11), the triangular space TS1 is small and the front wall portion 17 of the airbag 10 arranged in a substantially vertical direction. In the lower end 17b side itself, we are possible to prevent the pedestrian intrusion.

  Moreover, in the airbag 10 of the embodiment, the thickness L1 in the front-rear direction of the front wall portion 17 and the rear wall portion 18 is regulated by the tether 20, and the volume can be reduced. As the inflator 42 for supplying air, it is not necessary to use a large output, and conversely, even if a small output inflator 42 is used, the internal pressure of the airbag 10 (main body part 11) can be increased. Even if a pedestrian with high kinetic energy tries to enter from the lower surface 10 a side of the airbag 10, the airbag 10 does not move to the rear side, but catches the pedestrian and entangles the front wheels 6 and 6. Can be prevented.

  Therefore, in the airbag device S for pedestrians of the embodiment, the volume of the airbag 10 when the inflation is completed can be reduced, and pedestrians can be prevented from entering the lower surface 10a of the airbag 10 when the inflation is completed. can do.

  Furthermore, in the airbag 10 according to the embodiment, the thickness L1 in the front-rear direction between the front wall portion 17 and the rear wall portion 18 is regulated by the tether 20, and the front wall portion 17 of the airbag 10 when the inflation is completed. Therefore, even if the airbag device S is mounted on the lower surface side of the front edge 1b side of the vehicle body front end 1a as much as possible, the front wall of the airbag 10 when the inflation is completed It is possible to prevent the portion 17 from protruding forward from the vehicle body V unnecessarily.

  In the embodiment, the tether 20 is exemplified as the connecting means for connecting the front wall portion 17 and the rear wall portion 18 of the airbag 10, but the front wall portion 17 and the rear wall are used as connecting means such as stitching or adhesion. The part 18 may be directly connected.

  The number and arrangement of connecting means such as the tether 20 for connecting the front wall portion and the rear wall portion of the airbag are determined by the thickness dimension in the front-rear direction between the front wall portion and the rear wall portion of the airbag when the inflation is completed. However, as long as it is shorter than the case where there is no connection means, it can be set as appropriate.For example, as a single connection point, in the middle in the vertical direction, in a long state along the left-right direction. The front and rear wall portions may be connected to each other.

  Furthermore, the connecting position of the connecting means between the front wall portion and the rear wall portion can be determined by adjusting the thickness dimension in the front-rear direction between the front wall portion and the rear wall portion. The downward height position from the upper end of the wall portion does not have to coincide.

  And, for example, like the airbag 10A shown in FIGS. 11 and 12, the front end 20a of the tether 20A connected to the front wall portion 17 is more than the rear end 20b of the tether 20A connected to the rear wall portion 18 to the road surface GL. The film length LB from the rear end 20b of the tether 20A connected to the rear wall 18 to the mounting position 18a of the rear wall 18 so that the front end 20a of the tether 20A connected to the front wall 17 is increased. May be set to be longer than the film length LF from the mounting position 17a of the front wall 17 to the mounting position 17a.

  In the airbag 10A having such a configuration, when the inflation is completed, in the upper part of the tether 20A, the film length LB in the vertical direction on the rear wall 18 side becomes longer than the film length LF on the front wall 17 side. The portion 17d of the front wall portion 17 connected to the front end 20a of 20A is arranged to be shifted forward compared to the case where the front and rear ends of the tether are connected to the front and rear wall portions at the same height. Then, the portion 17e of the lower front wall portion 17 swells from the connecting position 17d located on the front side. Therefore, the lower end 17b of the front wall portion 17 can be arranged as far as possible on the front side, and the region up to the road surface GL side can be closed on the front side of the lower surface side of the vehicle body front end portion 1a.

1 is a schematic partial side view of a vehicle on which a pedestrian airbag device according to an embodiment of the present invention is mounted. It is a schematic front view of the vehicle by which the airbag apparatus for pedestrians of the embodiment is mounted. It is a general | schematic fragmentary top view of the vehicle by which the airbag apparatus for pedestrians of the embodiment is mounted. It is a general | schematic partial bottom view of the vehicle by which the airbag apparatus for pedestrians of the embodiment is mounted. It is a schematic longitudinal cross-sectional view of the airbag apparatus for pedestrians of the embodiment, and respond | corresponds to the VV site | part of FIG. It is a general | schematic disassembled perspective view of the flame | frame, case, inflator, and retainer utilized for the airbag apparatus for pedestrians of the embodiment. It is the top view which inflated the airbag used for the airbag apparatus for pedestrians of the embodiment. It is the front view which expanded the airbag used for the airbag apparatus for pedestrians of the embodiment. It is a longitudinal cross-sectional view of the airbag used for the airbag apparatus for pedestrians of the embodiment, and respond | corresponds to the IX-IX site | part of FIG. It is a schematic longitudinal cross-sectional view which shows the time of the action | operation of the airbag apparatus for pedestrians of the embodiment. It is the front view which expanded the airbag of other embodiments. It is a longitudinal cross-sectional view of the airbag shown in FIG. 11, and respond | corresponds to the XII-XII site | part of FIG.

Explanation of symbols

1 ... (Body) Body,
1a ... front end,
6 ... Front wheels,
10.10A ... Airbag,
12 ...
17 ... Front wall,
17b, 18b ... lower end,
18 ... rear wall,
20.20A (connecting means) tether,
32 ... (storage part) case,
L1: thickness dimension,
V ... Vehicle,
GL ... road surface,
S: Air bag device for pedestrians.

Claims (1)

It is stored on the lower surface side of the vehicle body on the front side of the front wheel of the vehicle, and when the inflation gas flows in, it can be prevented from being caught from the front side of the pedestrian, protrudes from the storage part, and the lower end side is brought into contact with the road surface, A pedestrian airbag apparatus configured to include an airbag that inflates so as to block between a lower surface of a front end portion of the vehicle body and a road surface,
The airbag-shaped peripheral wall of the airbag is configured to include a front wall portion and a rear wall portion that swell away from each other in the front-rear direction,
The front wall portion and the rear wall portion are connected by a connecting means so as to be able to regulate the thickness dimension in the front-rear direction when the airbag is completely inflated. .

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