JP2006273139A - Air bag device for pedestrian - Google Patents

Air bag device for pedestrian Download PDF

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Publication number
JP2006273139A
JP2006273139A JP2005095883A JP2005095883A JP2006273139A JP 2006273139 A JP2006273139 A JP 2006273139A JP 2005095883 A JP2005095883 A JP 2005095883A JP 2005095883 A JP2005095883 A JP 2005095883A JP 2006273139 A JP2006273139 A JP 2006273139A
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Japan
Prior art keywords
airbag
case
pedestrian
cover
road
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JP2005095883A
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Japanese (ja)
Inventor
Hajime Kitte
Atsushi Nagata
切手  肇
篤 永田
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Toyoda Gosei Co Ltd
豊田合成株式会社
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Priority to JP2005095883A priority Critical patent/JP2006273139A/en
Publication of JP2006273139A publication Critical patent/JP2006273139A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an airbag device for a pedestrian capable of preventing leakage of gas from an airbag in completion of expansion, storing the airbag compact and restraining increase of manufacturing man-hours and manufacturing cost. <P>SOLUTION: This airbag device for the pedestrian is constituted to expand the airbag 36 so as to block a part between a lower surface of a front end part of a car body and a road surface in working. This airbag device is furnished with a case 14 to store and hold the airbag 36 and a cover 28 arranged to block an opening 14a for projection below the case 14 and free to open in expansion of the airbag 36. The cover 28 is constituted to ground the side of a lower surface 28a on the road surface GL when the cover 28 is pushed by the airbag 36 to expand and opened. The airbag 36 is arranged to block a clearance between an upper surface 28b of the cover 28 grounded on the road surface GL and a lower surface of a front end part of a car body in completion of expansion. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention provides a pedestrian air provided with an airbag that is disposed on a lower surface side of a vehicle body on the front side of a front wheel of a vehicle and that can be inflated to prevent entrainment from the front side of the pedestrian during operation. The present invention relates to a bag device.

2. Description of the Related Art Conventionally, there has been a pedestrian airbag device mounted on a vehicle having a configuration in which an inflated airbag is disposed between a lower surface of a vehicle body on the rear wheel side and a road surface (for example, see Patent Document 1).
JP 7-277114 A

  Usually, in the pedestrian airbag device disposed on the lower surface side of the vehicle body on the front side of the front wheel of the vehicle, in order to prevent the pedestrian from getting into the lower surface side of the front end portion of the vehicle body at the time of interference with the pedestrian. As in the conventional airbag device, the airbag is preferably configured to complete the inflation so that the lower surface side is in contact with the road surface. However, in the pedestrian airbag apparatus configured as described above, when the vehicle is moving forward with the airbag completed inflating, the contact portion with the road surface on the lower surface side of the airbag is in contact with the road surface. There is a risk of being damaged by rubbing and causing gas leakage. For this measure, it can be considered to increase the wear resistance by increasing the thickness of the base fabric itself, but with such a measure, the airbag cannot be folded in a compact manner. This causes problems in storage and increases the number of manufacturing steps and costs of the airbag.

  The present invention solves the above-described problems, and can prevent gas leakage from the airbag when inflation is completed, can store the airbag in a compact manner, and suppress an increase in the number of manufacturing steps and costs of the airbag. An object of the present invention is to provide a pedestrian airbag device that can be used.

A pedestrian airbag device according to the present invention is configured to include an airbag that is accommodated in an inflatable manner on the lower surface side of a vehicle body on the front side of a front wheel of a vehicle. A pedestrian airbag device configured to inflate so that the airbag is closed between the lower surface of the front end of the vehicle body and the road surface,
A case that houses and holds the airbag and has a protruding opening for projecting the airbag on the lower side, and is disposed so as to close the protruding opening of the case and can be opened when the airbag is inflated. And a cover,
When the cover is pushed and opened by the inflating airbag, the lower surface side is configured to contact the road surface,
The airbag is arranged to close a gap between the upper surface of the cover that is grounded to the road surface and the lower surface of the front end portion of the vehicle body when the inflation is completed.

  In the pedestrian airbag apparatus of the present invention, the airbag is disposed so that the lower surface side is brought into contact with the upper surface of the cover that is opened and the lower surface side is grounded to the road surface when the inflation is completed. That is, in the airbag device for pedestrians of the present invention, the airbag is not in contact with the road surface when the inflation is completed because the inflation is completed by preventing the lower surface side from directly contacting the road surface. . Therefore, since it is not necessary to deal with the base fabric of the airbag itself to be thick, the airbag can be stored in a compact manner, and an increase in manufacturing steps and costs of the airbag can be suppressed.

  Therefore, in the pedestrian airbag device of the present invention, it is possible to prevent gas leakage from the airbag when inflation is completed, the airbag can be stored in a compact manner, and the increase in manufacturing steps and costs of the airbag can be suppressed. Can do.

  Further, in the pedestrian airbag device of the present invention, when the inflation of the airbag is completed, the cover disposed on the lower surface side of the airbag is disposed so that the lower surface side contacts the road surface. Even if the pedestrian interferes with the airbag that has been inflated, of course, the intrusion between the pedestrian's road surface and the cover can be suppressed, and the pedestrian's front end lower surface of the vehicle body Entrainment on the (front wheel) side can be prevented.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, the pedestrian airbag apparatus S1 according to the first embodiment of the present invention will be described. The pedestrian airbag apparatus S1 is mounted on a truck V as a vehicle as shown in FIGS. It is disposed on the lower surface side of the front end portion 1a of the vehicle body (body) 1 on the front side of the front wheels 4, 4. These front wheels 4 and 4 are arranged so as to be brakeable and steerable. 1 and 2 is a front bumper, and a member 6 is a spoiler. These members are attached to the frame 2 on the body 1 side using a bracket (not shown). . In the embodiment, the frame 2 is disposed substantially along the front-rear direction, and is disposed in parallel at two locations along the left-right direction.

  Further, the front-rear, up-down, left-right directions in the present 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. .

  1 to 7, the pedestrian airbag device S1 includes an airbag 36, an inflator 33 that supplies inflation gas to the airbag 36, and a case 14 that stores and holds the folded airbag 36 and the inflator 33. And a cover 28 that covers the lower surface side of the folded airbag 36.

  The pedestrian airbag device S1 has a sensor (not shown) for detecting the approach of a pedestrian disposed at a predetermined position of the bumper 5, and a control device (not shown) that receives a signal from the sensor is connected to the pedestrian. When a collision with the vehicle V is predicted, the inflator 33 is operated to supply the inflation gas to the airbag 36.

  In the embodiment, a plurality (five in the embodiment) of inflators 33 are disposed along the left-right direction. Each inflator 33 includes a columnar main body portion 33a having a plurality of gas discharge ports 33b on the lower end side, and a substantially square plate-like flange portion 33c projects from the outer peripheral surface of the main body portion 33a. An attachment hole 33d for inserting the bolt 8a of the retainer 8 for fixing the inflator 33 to the ceiling wall portion 15 of the case 14 is formed in the flange portion 33c together with the opening peripheral edge 39 formed in the airbag 36.

  The case 14 is made of a box-shaped sheet metal having an opening at the bottom, a ceiling wall portion 15 disposed along a substantially horizontal direction, and a cylindrical side wall extending downward from the entire circumference of the outer peripheral edge of the ceiling wall portion 15. And a section 25. In the case of the embodiment, the case 14 is set to have a width dimension in the left-right direction so that the left and right ends are positioned on the front side of the front wheels 4. At a position near the center in the left-right direction of the ceiling wall portion 15, a plurality of (in the case of the embodiment, five) insertion holes 16 that are opened in a circular shape are arranged in parallel along the left-right direction. A cylindrical main body 33a of the inflator 33 is inserted into each insertion hole 16 from above. In the case of the embodiment, when the case 14 is fixed to the frame 2, the insertion holes 16A and 16B disposed on the left and right ends are arranged adjacent to each other so that the inflator 33 and the frame 2 do not interfere with each other. It is disposed at a position away from 16. At the periphery of each insertion hole 16, four mounting holes 17 are vertically penetrated. Each inflator 33 is attached to these attachment holes 17 from the upper surface side of the ceiling wall 15, and the peripheral edge 39 of the opening 38 corresponding to each inflator 33 provided in the airbag 36 is provided on the lower surface of the ceiling wall 16. The bolts 8a of the retainer 8 that are attached from the side and prevent leakage of the inflation gas from the peripheral edge 39 are inserted.

  Each retainer 8 is configured as a substantially square ring having a hole through which the main body 33a of the inflator 33 can be inserted, and is provided with bolts 8a extending upward at the four corners. The retainer 8 serves to fix the peripheral edge of the opening of the airbag 36 and the inflator 33 to the ceiling wall portion 15 using the bolt 8a and the nut 9 fastened to the bolt 8a.

  Furthermore, on the front edge side of the ceiling wall portion 15, a plurality of attachment holes 18 for fixing the attachment reinforcing portion 42 disposed on the front side from the opening 38 of the airbag 36 to the lower surface side of the ceiling wall portion 15, Is formed. The bolts 11 are inserted into the mounting holes 18 together with the mounting holes 42a of the mounting reinforcing portions 42, and the nuts 12 are fastened to the bolts 11, whereby the mounting reinforcing portions 42 of the airbag 36 are connected to the ceiling wall. It will be fixed to the part 15.

  Further, as shown in FIG. 7, mounting holes 19 for fixing the case 14 to the frame 2 are formed in the ceiling wall portion 15 between the insertion holes 16 </ b> A and 16 </ b> B and the adjacent insertion holes 16. However, it is formed at two places on the front and rear edges. Bolts 20 are inserted into the mounting holes 19, and the bolts 20 are fastened to nuts 2 a fixed to the frame 2, whereby the case 14 is fixed to the frame 2 on the body 1 side.

  Furthermore, attachment holes 21 for fixing a strap 30 (described later) to the lower surface side of the ceiling wall portion 15 are formed in the vicinity of the front edges on the left and right ends of the ceiling wall portion 15. The strap 30 is disposed to connect the case 14 and the cover 28 when the cover 28 is opened. Bolts 22 penetrated in the vicinity of the end portions 30a of the respective straps 30 are inserted into the respective mounting holes 21, and the nuts 23 are fastened to the bolts 22 so that the end portions 30a of the straps 30 are connected to the ceiling wall portion. 15 (see FIG. 6).

  A flange portion 25a extending outward in a substantially horizontal direction is formed at the lower end of the side wall portion 25 of the case 14, and a cover 28 is connected to the flange portion 25a using a clip 29 described later. Has been. The cover 28 is formed from a synthetic resin such as an olefin-based thermoplastic elastomer, and is disposed so as to cover the projecting opening 14 a surrounded by the side wall portion 25 on the lower end side of the case 14. A plurality of clips 29 are disposed on the entire periphery of the cover 28 so as to protrude upward (case 14 side). Each clip 29 is integrally formed with the cover 28 and has a shaft portion 29a that protrudes upward (case 14 side), and a locking leg portion that protrudes so as to expand from the distal end side to the base portion side of the shaft portion 29a. 29b. The locking leg portion 29b is engaged with the periphery of the engagement hole 25c of the case flange portion 25a. When the airbag 36 is deployed and inflated, the engagement leg portion 29b is engaged with the engagement hole when pressed downward by the inflating airbag 36. The case 14 and the cover 28 can be released from each other so that the connection state between the case 14 and the cover 28 can be released.

  Further, as shown in FIG. 6, straps 30 are respectively connected to the upper surface side of the portion of the cover 28 that is in the vicinity of the rear edges of the left and right ends of the projecting opening 14 a using rivets 31. The strap 30 is formed into a flexible strip shape made of aramid fibers or the like. The strap 30 is for connecting the case 14 and the cover 28 when the cover 28 is opened, and the end 30a side is connected to the lower surface side of the case ceiling wall 15 using the bolt 22 and the nut 23. The end 30 b side is connected to the upper surface side of the cover 28 using the rivet 31. 10 and 11, the strap 30 does not prevent the airbag 36 from being expanded and inflated, and when the airbag 36 is completely inflated, the cover 28 contacts the lower surface 28a with the road surface GL. The dimensions are set to be possible. In the pedestrian airbag apparatus S1 according to the embodiment, the strap 30 has the end portion 30a connected to the case 14 at the front side as shown in FIG. The end portion 30b to be connected is disposed so as to be inclined substantially along the front-rear direction so as to be positioned on the rear side.

  As shown in FIGS. 8 and 9, the airbag 36 is composed of a woven fabric woven using polyester yarn, polyamide yarn, or the like. In the embodiment, the airbag 36 includes an upper fabric 36a and a lower fabric 36b having substantially the same shape. The outer peripheral edge is formed by joining using stitching or adhesion. In the airbag 36 of the embodiment, the upper fabric 36a and the lower fabric 36b are both formed by joining two base fabrics C so as to overlap (see FIG. 9). The airbag 36 includes a body 37 that inflates into a rod shape by inflating an inflation gas, and a peripheral portion 41 that serves as a coupling allowance between the upper and lower fabrics 36a and 36b. Yes. In the case of the embodiment, the portion 41a on the front edge side of the peripheral edge portion 41 constitutes the attachment reinforcing portion 42, and the attachment reinforcing portion 42 can be attached to the case ceiling wall portion 15 as described above. A mounting hole 42a through which the bolt 11 is inserted is formed.

  In addition, five circular gas inflow openings 38 for inserting the inflators 33 are formed in the upper cloth 36a near the center in the left-right direction. The openings 38 correspond to the insertion holes 16 formed in the case ceiling wall portion 15 so that the openings 38A and 38B disposed on the left and right ends are disposed slightly away from the adjacent openings 38. Is formed. A mounting hole 40 through which the bolt 8a of each retainer 8 is inserted is formed in the peripheral edge 39 of each opening 38. Further, the positions of the openings 38 are not close to the center position in the front-rear direction of the upper cloth 36a, but are arranged so as to approach the front edge 41a side.

  In the case of the embodiment, the main body portion 37 has a cylindrical shape with the axial direction approximately parallel to the left-right direction when the expansion is completed, and the width dimension in the left-right direction is on the front side of the front wheels 4, 4. It is set to be approximately equal to the width dimension of the vehicle V in the left-right direction so as to be positioned. Further, the main body 37 has a width dimension in the vertical direction at the time of completion of the expansion so that the lower surface 28a side of the cover 28 is in contact with the road surface GL while the lower surface 37a side is in contact with the cover 28. The dimension is set so that it can be pressed toward. Further, in the airbag 36 of the embodiment, the rectifying cloth 44 is disposed inside the main body portion 37 so that the inflation gas can be quickly supplied to the left and right ends of the main body portion 37 when the inflation is completed. The rectifying cloth 44 is formed of a cloth material similar to that of the airbag 36, has a substantially cylindrical shape with both left and right sides opened, and has an opening 44a having the same shape at a position corresponding to the opening 38 and the mounting hole 40. And a through-hole 44b.

  In the case of the embodiment, the airbag main body 37 maintains the contact state with the road surface GL of the front wheels 4 and 4 so that the braking and steering of the front wheels 4 and 4 can be performed when the inflation is completed in the vehicle mounted state. It is the structure which completes expansion | swelling so that a pedestrian's entrainment can be prevented. Specifically, the main body 37 is brought into contact with the upper surface 28b of the cover 28 with the lower surface 37a open so as to block the space between the road surface GL and the front end 1a of the vehicle body 1 on the front side of the front wheels 4 and 4. The cover 28 is pressed to the road surface GL side while the lower surface 28a side is grounded to the road surface GL, thereby completing the expansion.

  In the pedestrian airbag device S1 of this embodiment, when a collision with the pedestrian of the vehicle V is predicted, a control device (not shown) outputs an operation signal to the inflator 33, so that the gas discharge port 33b of the inflator 33 is provided. An expansion gas is discharged from the nozzle. Therefore, the airbag 36 stored in the case 14 protrudes from the protrusion opening 14a so as to press the cover 28 downward. Then, the locking leg portion 29b of the clip 29 disposed on the cover 28 comes out of the engagement hole 25c of the case flange portion 25a, and the cover 28 is released from the connection with the case 14 and pressed against the airbag 36. Accordingly, the airbag 36 projecting from the projecting opening 14a is brought into contact with the road surface GL, and the airbag 36 projecting from the projecting opening 14a is connected to the road surface GL and the front wheels 4.4 as shown in FIGS. The expansion is completed by closing the space between the front side of the front end portion of the vehicle body 1 on the front side of the vehicle body and bringing the lower surface 37a into contact with the cover 28 while pressing the cover 28 toward the road surface GL.

  And in airbag apparatus S1 for pedestrians of embodiment, the airbag 36 is made to contact the upper surface 28a of the cover 28 which opened the lower surface 37a side and grounded the lower surface 28a side to the road surface GL at the time of completion of inflation. Are disposed (see FIG. 10). In other words, in the pedestrian airbag apparatus S1 of the embodiment, the airbag 36 completes the inflation by preventing the lower surface 37a side from being in direct contact with the road surface GL, so that the contact with the road surface GL is completed when the inflation is completed. Not damaged by. Therefore, there is no need to deal with a thick base fabric of the airbag 36, and in the pedestrian airbag apparatus S1 of the embodiment, the lower fabric 36b disposed on the lower side when the inflation is completed is replaced with the upper fabric 36a. In the same manner as above, two base fabrics C are joined to be overlapped. As a result, in the pedestrian airbag apparatus S1 of the embodiment, the airbag 36 can be stored in a compact manner, and an increase in the number of manufacturing steps and costs of the airbag 36 can be suppressed.

  Therefore, in the pedestrian airbag device S1 according to the embodiment, it is possible to prevent gas leakage from the airbag 36 when the inflation is completed, the airbag 36 can be stored in a compact manner, and the manufacturing man-hour and cost of the airbag 36 can be reduced. The increase can be suppressed.

  In the pedestrian airbag device S1 of the embodiment, when the airbag 36 is completely inflated, the cover 28 disposed on the lower surface 37a side of the airbag 36 causes the lower surface 28a side to contact the road surface GL. Therefore, even if the pedestrian interferes with the airbag 36 that has been inflated, of course, the intrusion between the pedestrian's road surface GL and the cover 28 can be suppressed. Thus, it is possible to prevent the pedestrian from being caught on the lower surface (front wheel 4) side of the front end portion 1a of the vehicle body.

  In the pedestrian airbag device S1 of the embodiment, the cover 28 and the case 14 at the time of opening are configured to be connected by the straps 30 and 30, so that the cover 28 is separated from the case 14. Even if the cover is opened, the cover 28 can be reliably disposed on the lower surface 37a side of the airbag 36 when the inflation is completed. In particular, in the pedestrian airbag apparatus S1 of the embodiment, the strap 30 that connects the case 14 and the cover 28 has a lower end 30b that is connected to the cover 28 side on the case 14 side when the airbag 36 is completely inflated. Since it is disposed along the front-rear direction so as to be located behind the upper end 30a to be connected, it is opened even if the vehicle moves forward with the airbag 36 inflated. The cover 28 can be prevented from moving so as to be pulled rearward due to the frictional resistance generated between the cover 28 and the road surface GL. The cover 28 grounded to the road surface GL is displaced, and the lower surface 37a side of the airbag 36 is on the road surface. Contact with GL can be reliably prevented.

  Further, in the pedestrian airbag device S1 of the first embodiment, the cover 28 that is opened so as to be separated from the case 14 is configured to be in contact with the road surface GL, but for the pedestrian of the second embodiment. As shown in the airbag device S2, the door portion 51 with the cover 50 opened may be configured to contact the road surface GL.

  As shown in FIG. 12, the pedestrian airbag device S2 of the second embodiment is also mounted on a truck V as a vehicle, similar to the airbag device S1 described above, on the front side of the front wheels 4 and 4. This is a configuration arranged on the lower surface side of the front end 1a of the vehicle body (body) 1. The pedestrian airbag device S2 is configured to project and expand and inflate the airbag 36A from the case 14A moved downward during operation. As shown in FIGS. 12 to 14, the airbag 36A, the inflator 33, and the airbag An operation signal is sent to the case 14A for storing and holding the 36A and the inflator 33, the cover 50 covering the lower surface side of the folded airbag 36A, the case moving mechanism 58 for moving the case 14A downward, and the case moving mechanism 58 and the inflator 33. And a control device 48 for outputting.

  The pedestrian airbag device S2 of the second embodiment has a configuration in which three inflators 33 are provided. And each inflator 33 is the structure similar to the inflator 33 of the above-mentioned airbag apparatus S1 for pedestrians, attaches | subjects the same figure code and abbreviate | omits description. The inflator 33 is connected to a lead wire for inputting an operation signal (not shown) extending from the control device 48. Further, the airbag 36A and the case 14A have substantially the same configuration as the airbag 36 and the case 14 used in the pedestrian airbag apparatus S1 of the first embodiment, and the same members are denoted by the same reference numerals. The description is omitted.

  In the case 14A, three insertion holes 16 for inserting the main body 33a of the inflator 33 are formed. A plurality of connecting holes 25 b are formed in the left and right ends of the flange portion 25 a in the case side wall portion 25. The connecting hole 25b is for connecting the case 14A to the case moving mechanism 58 together with the cover 50, and is configured to be fixed to fixed frames 60 and 60 (to be described later) of the case moving mechanism 58 using the bolt 26. (See FIGS. 13 and 14).

  The cover 50 is formed of a synthetic resin such as an olefin-based thermoplastic elastomer, and includes a door portion 51 disposed so as to close the protruding opening 14a surrounded by the side wall portion 25 on the lower end side of the case 14A, and a door portion. 51, and a peripheral edge portion 55 that is disposed on the peripheral edge of 51 to fix the cover 50 to the case 14A. The peripheral portion 55 is fixed to the fixed frames 60 and 60 of the case moving mechanism 58 using the bolt 26 together with the flange portion 25a of the case 14A at the left and right end portions, and at the remaining front and rear end portions, It is fixed to the flange portion 25a of the case 14A using a clip or the like (not shown), and is fixed to the flange portion 25a of the case 14A over substantially the entire circumference.

  The door portion 51 is provided with a hinge portion 53 serving as a rotation center at the time of opening on the rear edge side, and a thin-walled planned break portion 52 that can be broken when the airbag 36A is deployed and inflated on the front edge side and the left and right edges. When the airbag 36A is deployed and inflated, the rear end is opened so that the front end 51a faces downward. Further, a bent portion 54 is continuously disposed along the left-right direction at a substantially intermediate portion in the front-rear direction of the door portion 51, and the door portion 51 is bent at the portion of the bent portion 54 after opening. It is configured to be possible. When the bent portion 54 is actuated, the case moving mechanism 58 causes the case 14A to move downward so that the rear end 14b side is positioned downward, and the airbag 36A is deployed and inflated. However, when opening the front end 51a so as to face downward, the door 51 is disposed in the vicinity of the road surface GL so that the door 51 is disposed along the road surface GL. As shown in FIG. 18, the bent portion 54 is bent so that the front portion 51b of the bent portion 54 is grounded to the road surface GL. And the part 51b of the front part side of the bending part 54 in the door part 51 will be interposed between the airbag 36A and the road surface GL at the completion of the inflation of the airbag 36A.

  The airbag 36A has a width dimension L2 in the front-rear direction and a width dimension L1 in the front-rear direction of the airbag 36 so that the volume when the inflation is completed is smaller than the airbag 36 of the pedestrian airbag apparatus S1. It is configured to be smaller than that (see FIGS. 8 and 15). Moreover, three openings 38 for inserting the inflator 33 are formed in the upper cloth 36a of the airbag 36A. Also in the airbag 36A of the second embodiment, the main body 37 has the lower surface 37a on the front side of the door 51 so as to close the space between the road surface GL and the front end 1a of the vehicle body 1 on the front side of the front wheels 4 and 4. Expansion is completed by making it contact with the part side part 51b and pressing the front part side part 51b of the door part 51 to the road surface GL side.

  The case moving mechanism 58 includes a case fixing portion 59 for fixing the case 14A, a link portion 62 disposed on the rear end side of the case fixing portion 59, and a drive mechanism 66 for driving the link portion 62. Has been.

  The case fixing portion 59 is a circuit that is arranged so as to connect the two fixed frames 60 and 60 disposed along the front-rear direction on the left and right ends of the case 14A and the front end 60a of the fixed frame 60. And a moving shaft portion 61. Each fixed frame 60 is formed in a long pipe shape with the axial direction extending in the front-rear direction as a substantially rectangular tube shape, and is configured by fixing a plurality of nuts 60c therein. The case 14A and the cover 50 are fixed using the left and right ends by fastening the bolts 26 penetrating the peripheral portion 55 of the cover 50 and the flange portion 25a of the case 14A to the nut 60c. The configuration is fixed to the frame 60. The rotation shaft portion 61 is disposed substantially along the left-right direction, and is connected and held to the frame 2A by a bracket 69 disposed at a position corresponding to the frame 2A. That is, the case fixing portion 59 of the embodiment is configured to be connected to the frame 2A on the body 1 side so as to be rotatable in the vertical direction around the rotation shaft portion 61 pivotally supported by the bracket 69. is there.

  The link portion 62 includes a pair of left and right link pieces 63 and 64 arranged on the rear end 60b side of each fixed frame 60, and a turn arranged along the left and right direction so as to connect the link pieces 64 and 64 to each other. The moving shaft portion 65 and the connecting shaft portion 67 disposed along the left-right direction so as to connect the connecting portions of the link pieces 63 and 64 are configured. The rotating shaft portion 65 is connected to the drive mechanism 66 and connected and held to the frame 2A by a bracket 70 disposed at a position corresponding to the frame 2A. The drive mechanism 66 includes a worm gear 66a and a drive motor 66b electrically connected to the control device 48. When the drive motor 66b is driven, the drive mechanism 66 drives the gear 66a to rotate the rotating shaft portion 65. It is configured to be movable.

  In the case moving mechanism 58 of the embodiment, the control device 48 (see FIG. 12) disposed at a predetermined position of the vehicle V inputs a signal from a sensor (not shown) disposed at a predetermined position of the bumper 5. Thus, at the time of the contact prediction when the contact of the pedestrian to the vehicle V is predicted, the drive mechanism 66 is driven to move the link pieces 63 and 64 of the link portion 62, and the fixed frame 60 is moved to the rotation shaft portion 61. As the rotation center, the rear end 60b side is rotated and moved downward, and the case 14A is moved downward so that the rear end 14b side is positioned downward and tilted. Further, the case moving mechanism 58 determines that the control device 48 does not shift to the contact prediction after the approach prediction, and that there is no contact between the vehicle V and the pedestrian from the distance and the vehicle speed between the pedestrian and the vehicle V. In some cases, the operation signal from the control device 48 is received and the position of the case 14A is returned to the state before the operation.

  In the pedestrian airbag device S2 of the second embodiment, when the control device 48 predicts the approach of the pedestrian to the vehicle V, the case moving mechanism 58 is activated, so that the case 14A is as shown in FIG. Then, the rear end 14b is moved downward so as to be inclined. Thereafter, at the time of the contact prediction when the contact with the vehicle V with the pedestrian is predicted, the control device 48 inputs the operation signal to the inflator 33, and the inflator 33 discharges the inflation gas. Then, the air bag 36A stored in the case 14A is inflated, breaks the surrounding break planned portion 52, pushes the door portion 51 open, and projects downward from the projection opening 14a of the case 14A. As shown by the two-dot chain line 12 and the solid line in FIG. 18, the expansion is completed so as to close the space between the road surface GL and the lower surface of the front end 1 a of the vehicle body 1 on the front side of the front wheels 4.

  Also in the pedestrian airbag device S2 of the second embodiment, when the airbag 36A is inflated, the lower surface 37a side is opened and the lower surface 51d side is grounded to the road surface GL. It will be arrange | positioned so that it may contact with the upper surface 51e of the front part 51b (refer FIG. 18). That is, also in the pedestrian airbag device S2 of the second embodiment, the airbag 36A completes the inflation so that the lower surface 37a is not in direct contact with the road surface GL. Not damaged by contact with Therefore, it is not necessary to deal with the base fabric itself of the airbag 36A to be thick, and the airbag 36A is the same as the airbag 36 in the airbag apparatus S1 of the first embodiment in the pedestrian airbag apparatus S2. The lower cloth 36b disposed on the lower side when the expansion is completed is formed by joining the two base cloths C in a manner similar to the upper cloth 36a (see FIG. 16). As a result, also in the pedestrian airbag device S2 of the second embodiment, the airbag 36A can be stored in a compact manner, and an increase in the number of manufacturing steps and costs of the airbag 36A can be suppressed.

  Therefore, also in the pedestrian airbag device S2 of the second embodiment, it is possible to prevent gas leakage from the airbag 36A when the inflation is completed, the airbag 36A can be stored in a compact manner, and the manufacturing steps of the airbag 36A can be reduced.・ The increase in cost can be suppressed.

  Further, in the pedestrian airbag device S2 of the second embodiment, the airbag 36A completes the inflation so as to close the gap between the case 14A moved downward by the case moving mechanism 58 and the road surface GL. It becomes. Therefore, in the pedestrian airbag device S2 of the second embodiment, the volume of the airbag 36A when the inflation is completed is the amount by which the case 14A moves downward as compared with the pedestrian airbag device S1 of the first embodiment. Can be reduced. Therefore, the number of inflators 33 can be reduced as compared with the pedestrian airbag apparatus S1 of the first embodiment.

  In the pedestrian airbag apparatus S2 of the second embodiment, the airbag 36A is set to have a smaller volume than the airbag 36 in the airbag apparatus S1 described above, but the airbag 36A that has been completely inflated is While being moved downward, the case 14A is held by the case moving mechanism 58, and the rear portion is supported by the rear portion 51b of the bent portion 54 of the door portion 51. The rear part 51b of the door part 51 has the bent part 54 side (lower end side) positioned in front of the hinge part 53 side (upper end side) when opened, and the upper and lower ends thereof are located on the case 14A and the road surface GL. Since the air bag 36A is disposed on the rear side of the airbag 36A when the inflation is completed, the pedestrian can be stabilized even if the pedestrian interferes with the airbag 36A that has completed the inflation. And can prevent the pedestrian from entering between the road surface GL and the airbag 36A, and the pedestrian's vehicle body front end 1a lower surface (front wheel 4) side can be caught, Can be prevented.

  Furthermore, in the pedestrian airbag device S2 of the second embodiment, if the contact between the vehicle V and the pedestrian is avoided after the case 14A is moved downward, the inflator 33 is not operated and is moved downward. The case 14A is configured to automatically return to the state before the operation by the case moving mechanism 58. Therefore, it is preferable that the airbag device S2 can be maintained so that the airbag 36A can be inflated until the next contact with the pedestrian.

  In the pedestrian airbag device S1 of the first embodiment, the opened cover 28 is connected to the case 14 and the strap 30 when the inflation of the airbag 36 is completed, and the pedestrian air bag of the second embodiment. In the bag device S2, the cover 51 is configured to open the door portion 51 in a state in which the connection state with the case 14A is maintained. For example, the cover is not directly connected to the airbag that has been inflated but the case. Then, the lower surface may be arranged so as to be grounded to the road surface.

1 is a schematic partial side view of a vehicle on which a pedestrian airbag apparatus according to a first embodiment of the present invention is mounted. It is a general | schematic fragmentary 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. In the airbag apparatus for pedestrians of the embodiment, it is a schematic longitudinal cross-sectional view which shows the edge part vicinity of the left-right direction of a case. It is a general | schematic disassembled perspective view of the flame | frame, case, inflator, and retainer which are used for the airbag apparatus for pedestrians of the embodiment. It is a top view of 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. In the airbag apparatus for pedestrians of the embodiment, it is a schematic longitudinal cross-sectional view which shows the inflation completion state of an airbag. In the airbag apparatus for pedestrians of the embodiment, it is a schematic partial front view which shows the expansion completion state of an airbag. It is a general | schematic partial side view of the vehicle by which the airbag apparatus for pedestrians which is 2nd Embodiment of this invention is mounted. It is a schematic longitudinal cross-sectional view of the airbag apparatus for pedestrians of the embodiment. It is a schematic exploded perspective view of a frame, a case, an inflator, a retainer, and a case moving mechanism used for the pedestrian airbag device of the embodiment. It is a top view of 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 XVI-XVI site | part of FIG. It is a schematic longitudinal cross-sectional view which shows the state which moved the case downward in the airbag apparatus for pedestrians of the embodiment. In the airbag apparatus for pedestrians of the embodiment, it is a schematic longitudinal cross-sectional view which shows the inflation completion state of an airbag.

Explanation of symbols

1 ... the body
1a ... front end,
4 ... Front wheels,
14.14A ... Case,
14a ... opening for protrusion,
28.50 ... cover,
33 ... Inflator,
36.36A ... Airbag,
GL ... road surface,
V ... Vehicle,
S1, S2 ... Pedestrian airbag devices.

Claims (1)

  1. The airbag is configured to include an airbag that is stored in an inflatable manner 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 a pedestrian during operation. A airbag device for a pedestrian configured to be inflated so as to block between the lower surface of the front end portion and the road surface,
    A case having a protruding opening for storing and holding the airbag and protruding the airbag on the lower side, and a case that is disposed so as to close the protruding opening of the case and opens when the airbag is inflated And a cover made possible,
    When the cover is pushed and opened by the inflating airbag, the lower surface side is configured to contact the road surface,
    The airbag device for a pedestrian is disposed so as to close a gap between an upper surface of a cover grounded to the road surface and a lower surface of a front end portion of the vehicle body when the inflation is completed. .
JP2005095883A 2005-03-29 2005-03-29 Air bag device for pedestrian Withdrawn JP2006273139A (en)

Priority Applications (1)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011121724A1 (en) * 2011-12-20 2013-06-20 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Airbag for a personal protection device
DE102012006534A1 (en) * 2012-03-29 2013-10-02 Gm Global Technology Operations, Llc Vehicle has carriage, front- and rear wheels and body lowered from rest position in blocking position by drive element coupled to accident detector, where body is lowered in intermediate space between front- and rear wheels
US20150008065A1 (en) * 2013-07-04 2015-01-08 Toyota Jidosha Kabushiki Kaisha Vehicle behavior control apparatus
US9327676B1 (en) * 2015-01-13 2016-05-03 Hon Hai Precision Industry Co., Ltd. Safety mechanism of vehicle and deployment method thereof
JP2017502874A (en) * 2013-12-30 2017-01-26 ティーケー ホールディングス インク.Tk Holdings Inc. Active knee protection system
WO2019059146A1 (en) * 2017-09-19 2019-03-28 いすゞ自動車株式会社 Pedestrian protection device for vehicle
AU2019271893B1 (en) * 2018-12-20 2020-05-14 Bombardier Transportation Gmbh Personal protection device for fixing on the underside of a rail vehicle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07277114A (en) * 1994-04-14 1995-10-24 Hino Motors Ltd Entry preventing device for impacting object
JPH09164906A (en) * 1995-12-15 1997-06-24 Akio Otani Emergency air-bag device for automobile
JP2001001848A (en) * 1999-06-22 2001-01-09 Toyota Central Res & Dev Lab Inc Pedestrian crash protection device for vehicle
JP2001334895A (en) * 2000-05-26 2001-12-04 Mazda Motor Corp Pedestrian protection device for vehicle
JP2002542110A (en) * 1999-04-22 2002-12-10 バイエル アクチェンゲゼルシャフト Safety shock absorber comprising an energy-absorbing element controlled by an impact sensor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07277114A (en) * 1994-04-14 1995-10-24 Hino Motors Ltd Entry preventing device for impacting object
JPH09164906A (en) * 1995-12-15 1997-06-24 Akio Otani Emergency air-bag device for automobile
JP2002542110A (en) * 1999-04-22 2002-12-10 バイエル アクチェンゲゼルシャフト Safety shock absorber comprising an energy-absorbing element controlled by an impact sensor
JP2001001848A (en) * 1999-06-22 2001-01-09 Toyota Central Res & Dev Lab Inc Pedestrian crash protection device for vehicle
JP2001334895A (en) * 2000-05-26 2001-12-04 Mazda Motor Corp Pedestrian protection device for vehicle

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011121724A1 (en) * 2011-12-20 2013-06-20 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Airbag for a personal protection device
US9221411B2 (en) 2011-12-20 2015-12-29 GM Global Technology Operations LLC Gasbag for a personal protection device
DE102012006534A1 (en) * 2012-03-29 2013-10-02 Gm Global Technology Operations, Llc Vehicle has carriage, front- and rear wheels and body lowered from rest position in blocking position by drive element coupled to accident detector, where body is lowered in intermediate space between front- and rear wheels
US20150008065A1 (en) * 2013-07-04 2015-01-08 Toyota Jidosha Kabushiki Kaisha Vehicle behavior control apparatus
US9156420B2 (en) * 2013-07-04 2015-10-13 Toyota Jidosha Kabushiki Kaisha Vehicle behavior control apparatus
JP2017502874A (en) * 2013-12-30 2017-01-26 ティーケー ホールディングス インク.Tk Holdings Inc. Active knee protection system
US9327676B1 (en) * 2015-01-13 2016-05-03 Hon Hai Precision Industry Co., Ltd. Safety mechanism of vehicle and deployment method thereof
WO2019059146A1 (en) * 2017-09-19 2019-03-28 いすゞ自動車株式会社 Pedestrian protection device for vehicle
AU2019271893B1 (en) * 2018-12-20 2020-05-14 Bombardier Transportation Gmbh Personal protection device for fixing on the underside of a rail vehicle

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