JP2010155534A - Vehicular safety device for collision with outdoor obstacle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular safety device for a collision with an outdoor obstacle capable of mitigating an impact of the outdoor obstacle without relying on an impact mitigating effect by windshield glass by mitigating the primary impact of the outdoor obstacle by the inflation and deployment of a bag body, and mitigating a secondary impact by the deformation of a hood. <P>SOLUTION: A bag body 11 comprises a first inflation bag body 11A which is inflated and deployed downward of a front bumper 5 to receive the outdoor obstacle 9, and a second inflation bag body 11B which is inflated and deployed upward of the front bumper 5 to receive the outdoor obstacle 9. Internal pressure in the second inflation bag body 11B during the inflation and deployment is set to be lower than that of the first inflation bag body 11A during the inflation and deployment. The bag body has a hood deforming means which absorbs the impact of the outdoor obstacle 9 by crashing and deforming the hood 3 when the outdoor obstacle 9 is collided with and brought into contact with a hood 3 arranged behind the front bumper 5 in an automobile 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an out-of-vehicle obstacle collision safety device for a vehicle including a bag body that is installed on a vehicle body behind a front bumper of a vehicle and detects an out-of-vehicle obstacle in the vehicle to inflate and deploy.

For example, a configuration described in Patent Document 1 is known as a conventional vehicle exterior obstacle collision safety device of this type.
JP 2001-334895 A

  A vehicle exterior obstacle collision safety device (vehicle pedestrian protection device) described in Patent Document 1 predicts contact with an exterior vehicle obstacle (pedestrian) and receives the obstacle outside the vehicle. In order to prevent the outside obstacle from being caught between the vehicle body and the road surface when the (buffer member) is deployed forward of the front bumper (front bumper), the air for preventing entrainment that operates after the buffer member is deployed. A bag (bag) is provided, and the cushioning airbag is deployed in front of the front bumper to receive obstacles outside the vehicle, and the entanglement prevention airbag is operated so that the obstacles outside the vehicle are separated from the vehicle body. It is designed not to be caught between the road surface.

  In the conventional vehicle exterior obstacle collision safety device having such a configuration, when the vehicle detects an obstacle ahead of the vehicle, the lower part of the vehicle obstacle first comes into contact with the entanglement airbag and then cushions. The vehicle abuts against the airbag to mitigate the impact, but the vehicle at this point is not completely braked and moves forward by at least the braking distance. By dragging forward, obstacles outside the vehicle will be considerably damaged.

  Therefore, the present invention reduces the impact of the obstacle outside the vehicle by reducing the primary impact by obstructing the obstacle outside the vehicle by inflating and expanding the bag body, and by relaxing the secondary impact by deforming the hood. It is an object of the present invention to provide an out-of-vehicle obstacle collision safety device configured as described above.

  An out-of-vehicle obstacle collision safety device for a vehicle according to the present invention is disposed at a front bumper portion of a vehicle, and includes an airbag device having a bag body that detects and detects an out-of-vehicle obstacle and is disposed behind the front bumper. And a hood hood that absorbs an impact applied to the outside obstacle by crushing and deforming when the outside obstacle collides, and the airbag device is inflated and deployed below the front bumper. And a second inflating bag body that inflates and expands upward with respect to the front bumper, and the internal pressure when the second inflating bag body is inflated and deployed is set lower than the internal pressure when the first inflating bag body is inflated and deployed. It is characterized by that.

  According to the present invention, when an outside obstacle existing in front of the vehicle is detected, first, the first inflatable bag body and the second inflatable bag body are inflated and deployed to alleviate the impact of the outside obstacle. At this time, the obstacle outside the vehicle abuts against the first inflatable body having a high internal pressure and falls to the hood hood side of the vehicle while the impact is eased, and the impact is eased while collapsing the second inflatable bag body having a low internal pressure. As a result, the bonnet hood is deformed by the hood deforming means in contact with the bonnet hood, and the impact is alleviated.

  In this process, since the internal pressure of the second inflatable bag body is set low, the impact of the obstacle outside the vehicle is mitigated by the deformation of the hood hood, and the impact mitigating effect of the obstacle outside the vehicle is difficult to appear. The windshield having a shape does not bear an impact mitigating action.

  Also, the vehicle exterior obstacle collision safety device according to the present invention has front bumper moving means for moving the front bumper to the front side of the vehicle with respect to the vehicle body, and the bag is inflated and deployed by the front bumper moving means. In some cases, the gap between the front bumper and the vehicle body is enlarged so that the first inflatable bag body is inflated and deployed downward with respect to the front bumper through the gap and then inflated and deployed in front of the vehicle. The second inflatable bag body may be configured to be inflated and deployed upward with respect to the front bumper through the gap and then inflated and deployed to the front of the vehicle.

  With this configuration, when the bag body is inflated and deployed, the front bumper is moved to the front of the vehicle to widen the gap between the front bumper and the vehicle body, so that the space in the inflating and deploying direction of the first and second inflatable bag bodies is increased. It is possible to secure a wide range, and it is possible to easily develop the bag body having a larger restrained area and a large thickness in the longitudinal direction of the vehicle body.

  According to the present invention, since the internal pressure of the second inflatable bag body that inflates and deploys above the front bumper is set lower than the internal pressure of the first inflatable bag body that inflates and deploys below the front bumper, Before reaching the windshield, the impact is alleviated by the deformation of the hood.

  Next, an embodiment of a vehicle exterior obstacle collision safety device according to the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view schematically showing a front portion of an automobile adopting an embodiment of the vehicle exterior obstacle collision safety device according to the present invention, and FIG. 2 is a drawing around a front bumper and a vehicle body frame in FIG. FIG. 3 is a perspective view depicting the configuration of the main part of the vehicle exterior obstacle collision safety device in FIG. 2, FIG. 4 is a cross-sectional view taken along the line AA in FIG. 2, and FIG. FIG. 6 is a perspective view of the front side of the vehicle at the initial stage of shock mitigation by an obstacle outside the vehicle, and FIG. 7 is also an obstacle outside the vehicle. FIG. 8 is a front side perspective view of the front of the automobile in which the state of the hood is deformed due to the further progress of the impact reduction by the obstacle outside the vehicle. FIG.

  First, in FIG. 1, a vehicle, for example, an automobile 1 includes an engine room 2 in which an engine that is a prime mover of the automobile 1 is installed at a front portion thereof, and an upper opening of the engine room 2 is closed by a hood hood 3. ing. The bonnet hood 3 is configured to be able to open and close the upper opening of the engine room 2 by, for example, hinge-joining the front side to the vehicle body 4.

  At the same time, the hood hood 3 is configured such that the rear side of the automobile 1 is flipped up by a hood elevating link body 3 a as shown in FIG. 9, and the hood elevating link body 3 a is a front pillar on both the left and right sides of the automobile 1. The hood 3 is flipped up by inflating and deploying the airbag device 15 provided with the front pillar provided in 1c.

  That is, the airbag device 15 provided with the front pillar inflates the folded airbag 15d and the airbag 15d in a housing portion 15c formed by a case body 15a having an upper opening and a lid body 15b closing the upper opening. The inflator 15e to be deployed is accommodated, and when the detecting means detects the proximity of an obstacle outside the vehicle, the lid 15b is opened to open the upper portion of the case body 15a, and the airbag is driven by the gas pressure of the inflator 15e. 15d is inflated and deployed to cover the front pillar 1c.

  The lid body 15b jumps up the rear end side of the hood hood 3 by its opening operation, and the raised hood lifting / lowering link body 3a stands upright and holds the bent state. (It is configured to release the locked state of the bonnet hood 3 by the detection signal of the detection means before the rear end side of the bonnet hood 3 is flipped up).

  Further, a radiator grille 1a is installed at the center of the front portion of the automobile 1, and headlamps 1b are respectively provided on both sides of the radiator grille 1a.

  Further, a front bumper 5 is installed below the radiator grille 1a and the headlamp 1b in the front portion of the automobile 1, and the front bumper 5 has a bumper reinforcement 6 existing inside thereof.

  The bumper reinforcement 6 is installed on the cross member 7a of the vehicle body frame 7 constituting the vehicle body via a pair of cylinder devices 8 constituting front bumper moving means. When detecting means (not shown) detects that the front bumper 5 moves forward through the bumper reinforcement 6 when the detection means (not shown) detects the detection.

  A case body 10 constituting an airbag device is installed on the front surface of the cross member 7a.

  The case body 10 is formed in a substantially box shape, and the upper and lower side plates 10b are configured to be slidable to the rear side of the automobile with respect to the front plate 10a. For this reason, the upper and lower side plates 10b are fixed in a state where one end sides of the pair of wires 10c are separated from each other, and the other end sides of both the wires 10c are respectively crossed after once extending to the rear side of the automobile 1. After being folded forward by a hook ring 7b attached to the member 7a, it is fixed to the bumper reinforcement 6 via a bracket 8b in which a rod 8a of a cylinder device 8 is installed.

  Therefore, by operating the cylinder device 8, when the bumper reinforcement 6 moves together with the front bumper 5 through the rod 8a to the front of the automobile 1, the wire 10c is pulled in conjunction with this, and as a result, the case 10 The upper and lower side plates 10b of the body 10 slide to the rear of the automobile 1 to open the upper and lower surfaces of the case body 10 (see the state shown in FIG. 3).

  The case body 10 contains a folded bag body 11 and an inflator 12 for inflating and deploying the bag body 11, and the inflator 12 generates gas when the detecting means detects the presence of an obstacle 9 outside the vehicle. Then, the bag body 11 is configured to be inflated and expanded (see the state shown in FIG. 10).

  The bag body 11 is configured separately from each other. The first inflatable bag body 11A that is once deployed below the front bumper 5 and then inflated and deployed in front of the automobile 1; The inflator 12 is configured as a pair and corresponds to each of the first inflatable bag body 11A and the second inflatable bag body 11B. Yes.

  Then, the inflator 12 on the second inflatable bag body 11B side is inflated and deployed by the second inflated bag body 11B by the internal pressure when the first inflated bag body 11A is inflated and deployed, compared to the inflator 12 on the first inflated bag body 11B side. The internal pressure at the time is set to be low.

  Furthermore, in the embodiment according to the present invention, as shown in FIG. 9, the hood hood 3 is installed in the hood inner 13 to form a closed cross section on the inner surface of the front and rear ends of the automobile 1. The hood deformation | transformation means 14 which deform | transforms by the collision of the obstacle 9 outside a vehicle is formed in the front-back direction approximate center part.

  In the embodiment according to the present invention configured as described above, when a detection means (not shown) detects that an obstacle 9 outside the vehicle exists in front of the vehicle 1, first, the rod of the cylinder device 8 is used. 8a advances to advance the bumper reinforcement 6 together with the front bumper 5, and the gap between the front bumper 5 and the cross member 7a of the vehicle body frame 7 is enlarged.

  As the bumper reinforcement 6 advances, the wire 10c is pulled, and the upper and lower side plates 10b of the case body 10 are slid rearward of the automobile 1 to open the upper and lower surfaces of the case body 10 (see FIG. 3). State shown).

  After that, when both inflators 12 generate gas, the first inflatable bag body 11A is once deployed below the automobile 1 from the enlarged gap between the cross member 7a and the front bumper 5, and then in front of the automobile 1. The second inflatable bag body 11B is inflated and deployed and then inflated and deployed in front of the automobile 1 after being deployed above the automobile 1, and together with this, the lid 15 is inflated and deployed by the airbag 15d of the airbag device 15 provided with the front pillar. The body 15b opens and the rear end of the hood hood hood is flipped up (see the state shown in FIG. 5).

  Then, as shown in FIG. 6, when the vehicle outside obstacle 9 such as a road sign comes into contact with the first inflatable bag body 11A and the second inflatable bag body 11B, the first inflatable bag body 11A and the second inflatable bag The body 11B absorbs the impact of the obstacle 9 outside the vehicle.

  At this time, the automobile 1 moves forward by the braking distance, and since the internal pressure of the second expansion bag body 11B is set lower than the internal pressure of the first expansion bag body 11A, as shown in FIG. As shown in FIG. 7, the second inflated bag body 11 </ b> B is crushed more greatly than the first inflated bag body 11 </ b> A due to the collision with the outside obstacle 9. In relation to this, the upper side falls to the bonnet hood 3 side due to the moment of inertia and proceeds toward the windshield 16, and the upper side of the obstacle 9 outside the vehicle is an abbreviation of the hood 3 as shown in FIG. It will collide with the center in the front-rear direction.

  At this time, since the hood deforming means 14 is provided in the substantially central portion of the hood hood 3, the hood hood 3 is recessed toward the engine room 2 due to the collision of the obstacle 9 outside the vehicle, and the secondary impact of the obstacle 9 outside the vehicle Therefore, the obstacle 9 outside the vehicle is surely captured.

  Therefore, with this configuration, when the outside obstacle 9 existing in front of the automobile 1 is detected, first, the first inflating bag body 11A and the second inflating bag body 11B are inflated and deployed, and the impact of the outside obstacle 9 is alleviated. However, at this time, the obstacle 9 outside the vehicle comes into contact with the first inflatable body having a high internal pressure and falls to the hood side of the vehicle while mitigating the impact, and the second inflatable bag body having a low internal pressure is crushed while The primary impact is alleviated, and then contacted with the hood hood. As a result, the hood deforming means 14 causes the substantially central portion of the bonnet hood 3 to be dented toward the engine room 2 and deformed, thereby mitigating the secondary impact. Will be.

  In this process, since the internal pressure of the second inflatable bag body 11B is set low, the vehicle outside obstacle 9 does not reach the windshield 16 and the impact is mitigated by the deformation of the hood hood. .

  Further, according to the present embodiment, the front bumper 5 is moved together with the bumper reinforcement 6 to the front of the automobile 1 when the first and second inflatable bag bodies 11A and 11B constituting the bag body 11 are inflated and deployed. Since the gap between the front bumper 5 and the cross member 7a of the vehicle body frame 7 in the vehicle body 4 is enlarged, a wide space in the expansion and deployment direction of the first expansion bag body 11A and the second expansion bag body 11B can be secured. The bag body having a larger restrained area and a large thickness in the longitudinal direction of the vehicle body can be easily developed.

  As described above, the present invention is set so that the internal pressure of the second inflatable bag body inflated and deployed above the front bumper is lower than the internal pressure of the first inflatable bag body inflated and deployed below the front bumper. Since the obstacles outside the vehicle can be mitigated by deformation of the bonnet hood before reaching the windshield, it is installed on the vehicle body behind the front bumper of the vehicle and detects the obstacle outside the vehicle to expand It can be said that it is suitable for a vehicle exterior obstacle collision safety device or the like that is configured to include a deploying bag body.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view schematically illustrating a front portion of an automobile that employs an embodiment of a vehicle exterior obstacle collision safety device according to the present invention. FIG. 2 is a perspective view of the front bumper and the body frame around FIG. 1. FIG. 3 is a perspective view depicting a main configuration of the vehicle exterior obstacle collision safety device in FIG. 2. It is AA sectional drawing of FIG. It is the perspective view which drawn roughly the front part of the motor vehicle in the state which the bag body of the vehicle exterior obstacle collision safety device expanded similarly. FIG. 3 is a front side perspective view of the automobile at the initial stage of shock mitigation due to an obstacle outside the vehicle. It is a front part side perspective view of the car which similarly drawn the state where the impact relaxation by the obstacle outside a vehicle advanced. FIG. 5 is a front side perspective view of the automobile in which a state in which the impact relief by the obstacle outside the vehicle further progresses and the hood hood is deformed is depicted. It is a general | schematic fragmentary longitudinal cross-sectional view in the normal time of the motor vehicle front part provided with the hood deformation | transformation means which concerns on embodiment of this invention. It is a general | schematic fragmentary longitudinal cross-section in the motor vehicle front part which drew the time of the action | operation of the hood deformation | transformation means which concerns on embodiment of this invention.

Explanation of symbols

1 Car 3 Bonnet Hood 4 Car Body 5 Front Bumper 6 Bumper Reinforce 7 Body Frame 8 Cylinder Device (Front Bumper Moving Means)
9 Obstacle outside the vehicle 11 Bag 11A First inflatable bag 11B Second inflatable bag 14 Hood deformation means 16 Windshield

Claims (2)

  An airbag device having a bag body that is installed at a front bumper portion of a vehicle to detect and inflate and deploy an obstacle outside the vehicle, and is crushed and deformed when the obstacle outside the vehicle is disposed behind the front bumper. A hood that absorbs an impact applied to the obstacle outside the vehicle, and the airbag device includes a first inflatable bag body that inflates and deploys downward from the front bumper, and a second inflate and deploys upward from the front bumper. A vehicle exterior obstacle collision safety device having an inflatable bag body, wherein an internal pressure at the time of inflating and deploying the second inflatable bag body is set lower than an internal pressure at the time of inflating and deploying the first inflatable bag body.   Front bumper moving means for moving the front bumper to the front side of the vehicle with respect to the vehicle body is configured such that a gap between the front bumper and the vehicle body is expanded by the front bumper moving means when the bag body is inflated and deployed. Thus, the first inflatable bag body is inflated and deployed downward from the gap with respect to the front bumper, and then inflated and deployed to the front of the vehicle, and the second inflated bag body from the gap to the front bumper. The vehicle exterior obstacle collision safety device according to claim 1, wherein the vehicle is inflated and deployed upward and then inflated and deployed forward of the vehicle.