JPH08258667A - Hood air bag device - Google Patents

Abstract

PURPOSE: To prevent a pedestrian from falling off from a hood, when the vehicle collides with the person and the shock is buffered by an air bag installed on the hood. CONSTITUTION: A netting 18 is provided to be actuated in a certain lag from the spread of a hood air bag 16, and when a vehicle collides with a pedestrian, the pedestrian is buffered by the air bag 16, positioned on a hood 14, covered from above, and held on the hood 14, and thus the pedestrian is protected against shock caused by dropping onto the road surface and also touching an other vehicle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when a running vehicle collides with a pedestrian, deploys an airbag on the hood of the vehicle and absorbs the impact of the secondary collision with the hood. The present invention relates to a hood airbag device that is relaxed to protect pedestrians.

[0002]

2. Description of the Related Art It is known that when a running vehicle collides with a pedestrian, the collided pedestrian is secondarily collided with the lower half of the body by the front portion of the vehicle body and the upper surface of the hood at the front portion of the vehicle body. . Therefore, for example, in Japanese Utility Model Laid-Open No. 6-74533, an airbag is deployed on a hood at the front of the vehicle,
This airbag describes the pedestrian protection airbag device that absorbs the impact at the time of the secondary collision and prevents the pedestrian who has collided the secondary collision from falling on the hood. This will be described with reference to FIGS.

This pedestrian protection airbag device includes a windshield 2 near the lower part, which is a highly rigid portion on the front surface of the vehicle body of the vehicle 1, and left and right fenders 3, 3 above the straddle tower. Airbag 4 in 3 places
An airbag module including the inflator 5 and the inflator 5 is housed. Then, when the contact detection sensor 7 provided on the front bumper 6 at the front part of the vehicle body detects the contact with the pedestrian H and outputs a detection signal, each of the airbags 4 stored at the three locations is inflated. The pedestrian H is deployed to mitigate the impact of a secondary collision between the pedestrian H and a highly rigid portion on the front surface of the vehicle body. But,
It is configured to prevent falling from the front of the vehicle body such as the hood 8.

[0004]

However, according to the conventional pedestrian protection airbag device described above, the pedestrian H
However, in the case of a secondary collision on the hood at the front of the vehicle body, the hood 8 having a relatively low rigidity is deformed to absorb the impact. However, if the hood 8 is not deformed well, it may not be sufficiently buffered, and the fall prevention is insufficient only with the two airbags 4 and 4 of the left and right fenders 3 and 3. It was

The present invention has been made in view of the above circumstances, and reliably absorbs the impact of a secondary collision with the hood 8 when a running vehicle collides with a pedestrian, and at the same time, the hood 8
It is an object of the present invention to provide a hood airbag device provided with means for surely preventing a pedestrian from falling from above.

[0006]

As a means for solving the above problems, the present invention provides a hood on the front hood of a vehicle body or the like when receiving a signal output when a collision with a pedestrian is detected. In a hood airbag device that deploys an airbag and absorbs the impact when the pedestrian makes a secondary collision with the hood or the like by the hood airbag, the hood airbag operates later than the deployment of the hood airbag, It is characterized by being provided with a fall prevention means for covering the upper pedestrian from above and holding it on the hood.

[0007]

When the hood airbag is inflated by receiving a signal output by detecting a collision with a pedestrian, the fall prevention means operates after the deployment of the hood airbag, and the fall prevention means operates the hood airbag. A pedestrian who is buffered by a bag and positioned on a hood or the like is covered from above and held on the hood or the like to prevent the pedestrian from falling to the road surface.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a hood airbag device according to the present invention will be described below with reference to FIGS.

1 to 4 show a first embodiment of a hood airbag device according to the present invention. The front side of a front bumper 12 provided at a front end portion of a vehicle body 11 covers the entire area in the vehicle width direction. The pedestrian collision detection sensor 13 is embedded. The pedestrian collision detection sensor 13 is a touch sensor whose contacts are made conductive by being compressed by a collision load input from the front, and is capable of detecting a collision with a pedestrian when the vehicle is traveling. There is.

The hood 14 at the front of the vehicle body is formed with a storage recess 15 which is openably and closably closed by a lid 14a. Inside the storage recess 15, a folded airbag 16 and the air bag 16 are provided. An inflator (not shown) for inflating the bag 16 is stored. And
When the pedestrian collision detection sensor 13 detects a collision with a pedestrian, an ignition current flows through the inflator, the gas generating agent in the inflator is ignited to generate gas, and the generated gas is filled to the airbag. 16 is inflated, pushes the lid 14a open, bulges out from the storage recess 15, and is deployed on the hood 14.

A storage part 1 for storing a fall prevention net 18 in a folded state at the front end of the roof 17 of the vehicle body 11.
9 is provided, and the opening portion of the storage portion 19 has a roof 17
Is opened in a substantially rectangular shape over the entire width thereof, and is openably and closably closed by a lid 17a.

The fall prevention net 18 is a coarse net 18a stretched between two wires 20 and 20. One end of each wire 20 on the rear side is on the left and right sides inside the accommodating portion. Is fastened to the wire anchors 21 installed at the front ends of the winding devices 23 and 23 installed at the front ends of the left and right fenders 22 and 22, respectively.
It is connected so that it can be wound up. Then, in a state in which the fall prevention net 18 and the rear portion of each wire 20 are accommodated in the accommodating portion 19, between the fall prevention net 18 on the front side of each wire 20 and the winding device 23. Are locked to the front surfaces of the left and right A pillars 24, 24 of the vehicle body 11 and the upper surfaces of the fenders 22, 22, respectively, and are arranged in a non-tensioned state (see FIG. 4).

Next, the operation of this embodiment configured as described above will be described.

When a running vehicle collides with a pedestrian, the pedestrian collision detection sensor 1 mounted on the front bumper 12
3 is compressed by the collision load and becomes conductive, and an ignition current is supplied to the inflator. Then, the gas generated by the inflator is filled and the airbag 16 is inflated and deployed so as to cover the hood 14, and a pedestrian (not shown) colliding with the airbag 16 collides with the airbag 16 so that the hood The shock of the secondary collision with 14 and the like is absorbed and protected, and the stoppers of the pretensioners of the winding devices 23 and 23 come off slightly later than the inflation and deployment of the airbag 16.
The wires 20, 20 are wound at once. At this time, the wires 20 and 20 are respectively applied with tension,
The front surface of the A-pillar 24 and the upper surface of the fender 22 are unlocked, and the tension is provided between the front ends of the left and right fenders 22 and the front end of the roof 17, which is located on the rear side and at a higher position on the same side. .

As a result, the storage portion 19 at the front end of the roof 17 is provided.
The fall prevention net 18 stored in the lid 17a
The pedestrian that is opened and pulled out and expanded so as to cover the pedestrian on the hood 14 from above, and the pedestrian buffered by the airbag 16 on the hood 14 is pressed onto the hood 14 by the fall prevention net 18, It is possible to prevent the pedestrian from colliding from falling onto the road surface and to avoid a pedestrian who collides with the road surface from coming into contact with another vehicle after the fall.

In this embodiment, the case where the fall prevention net 18 is used as the fall prevention means has been described, but instead of the fall prevention net 18, as shown in FIG. 5, two wires 20, A substantially rectangular sheet 25a is stretched between 20 to form the fall prevention sheet 25, or a plurality of ropes 26a are stretched at equal intervals between the two wires 20 and 20, as shown in FIG. With the fall prevention cord 26, almost the same operational effect can be obtained.

FIGS. 7 and 8 show a second embodiment of the present invention. The first embodiment is a means for pulling out the fall prevention net stored in the storage portion 19 at the front end of the roof 17 onto the hood 14. In the example, two wires and a winding device for winding the wires are provided, whereas in this embodiment, two arms and an arm driving device for driving the arms are provided. The same components as those in the first embodiment are designated by the same reference numerals and will be described below with reference to the drawings.

The hood 14 in the front part of the vehicle body 31 is formed with a storage recess 15 which is openably and closably closed by a lid 14a. In the storage recess 15, a folded airbag and the airbag are provided. And an inflator (both not shown) for inflating. When the pedestrian collision detection sensor 13 provided on the front bumper 12 at the tip of the vehicle body 31 detects a collision with a pedestrian, an ignition current flows through the inflator and the gas generated by the inflator is filled to the airbag. Is inflated, pushes the lid 14a open, swells from the storage recess 15, and is deployed on the hood 14.

A storage portion 1 for storing a fall prevention net 38 at the front end portion of the roof 17 of the vehicle body 31 by folding it.
9 is provided, and the opening portion of the storage portion 19 has a roof 17
Is opened in a substantially rectangular shape over the entire width thereof, and is openably and closably closed by a lid 17a.

Further, the fall prevention net 38 has two adjacent corners of a substantially rectangular net 38a in anchors 39, 39 provided on both left and right sides in the storage section 19, respectively.
Each is locked through a wire and the remaining 2
One corner is connected to the upper ends of the two arms 30 and 30, and the lower ends of the arms 30 and 30 are respectively installed at the lower ends of the left and right A pillars 24 and 24 of the vehicle body 31, respectively. It is connected to 33.

Next, the operation of this embodiment configured as described above will be described.

When a running vehicle collides with a pedestrian, the pedestrian collision detection sensor 13 is used as in the case of the first embodiment.
Detects a collision and sends an ignition current to the inflator. Then, the airbag inflated by the gas generated by the inflator is deployed so as to cover the hood 14. Therefore, the pedestrian (not shown) having collided is protected by absorbing the impact at the time of the secondary collision with the hood 14 and the like, and at the same time, slightly behind the inflation and deployment of the airbag 16, the arm drive devices 33, 33. Are activated, and both arms 30, 30
Is rotated forward (to the left in FIG. 7) about the lower ends of the left and right A pillars 24, 24 as a fulcrum, so that both arms 30, 30
The fall prevention net 38 locked to the upper end of each of the
The lid 17a is opened and pulled out and expanded so as to cover the pedestrian on the hood 14 from above, and the pedestrian buffered by the airbag on the hood 14 is pressed onto the hood 14 by the fall prevention net 38 to Since it is prevented from falling onto the road surface from above 14, it is possible to avoid a pedestrian who has collided from falling onto the road surface and contact with another vehicle after the fall, as in the case of the above-described embodiment.

Further, FIGS. 9 to 11 show a third embodiment of the present invention. In both of the embodiments, the storage portion for the fall prevention net is provided at the front end of the roof 17, whereas In the embodiment, the accommodating portion 44 is formed in the cowl portion 43 below the windshield 42 of the vehicle body 41, and the same components as those in the second embodiment are designated by the same reference numerals and the drawings will be described below. It will be explained based on.

A storage recess 15 that is openably and closably closed by a lid 14a is formed near the center of the hood 14 at the front of the vehicle body 41. Inside the storage recess 15, a folded airbag and An inflator (both not shown) for inflating the airbag is housed. When the pedestrian collision detection sensor 13 provided on the front bumper 12 at the tip of the vehicle body 41 detects a collision with a pedestrian, an ignition current flows through the inflator, and the gas generated in the inflator is filled to the airbag. Is inflated, pushes the lid 14a open, swells from the storage recess 15, and is deployed on the hood 14.

The cowl portion 43 below the windshield 42, which is also behind the hood 14, is provided with a storage portion 44 for folding and storing the fall prevention net 48. The opening portion of the storage portion 44 has a cowl portion. It has an opening of substantially the same length as 43 and is closed by a lid 44a so that it can be opened and closed.

The fall prevention net 48 has two adjacent corners of a substantially rectangular net 48a locked to anchors 49, 49 provided on the left and right sides inside the storage portion 44, and the remaining corners. Two corners are connected to respective tips of the two arms 40, 40, and respective base ends of the arms 40 are installed in left and right fenders near the front of the vehicle body and are connected to arm drive devices 45, 45. There is.

Next, the operation of this embodiment configured as described above will be described.

When a running vehicle collides with a pedestrian, as in the case of the second embodiment, the airbag is deployed on the hood 14 to absorb the impact of the secondary collision with the hood 14. In addition to being protected, the arm drive devices 45, 45 are actuated slightly later than the inflation and deployment of the airbag, and both arms 4 with the arm drive devices 45, 45 as a fulcrum.
0, 40 are rotated forward (to the left in FIG. 9), and the fall prevention nets 48 locked to the respective tips of both arms 40, 40 are moved to the lid, as in the case of the second embodiment. The fall prevention net 48 is provided to open the pedestrian 44a opened and extended to cover the pedestrian on the hood 14 from above and to cushion the pedestrian on the hood 14 by the airbag.
It prevents the pedestrian from falling onto the hood 14 and falling from the hood 14 onto the road surface. It can be avoided.

[0029]

As described above, the hood airbag device of the present invention reduces the impact when a pedestrian who collides by deploying the hood airbag on the hood or the like makes a secondary collision with the hood or the like. Since the pedestrian buffered by the airbag is pushed onto the hood by the fall prevention means that operates later than the deployment of the hood airbag, it is ensured that the pedestrian falls from the top of the hood or the like to the road surface. Therefore, it is possible to prevent the impact from being dropped on the road surface and the contact with other vehicles.

[Brief description of drawings]

FIG. 1 is a perspective view of a front portion of a vehicle body showing a developed state of a fall prevention net of a first embodiment of a hood airbag device equipped with fall prevention means of the present invention.

FIG. 2 is a side view of FIG. 1 showing a non-collision state of a vehicle equipped with the hood airbag device of the first embodiment.

FIG. 3 is an enlarged cross-sectional side view of a main part of FIG. 2, showing a stored state of the fall prevention net.

4 is a plan view of FIG. 2 with the lid removed.

FIG. 5 is a perspective view showing an application example of the first embodiment.

FIG. 6 is a perspective view showing another application example of the first embodiment.

FIG. 7 is a side view of the front portion of the vehicle body showing a developed state of the fall prevention net of the second embodiment of the hood airbag device equipped with the fall prevention means of the present invention.

FIG. 8 is a plan view of the airbag of FIG. 7 when not deployed.

FIG. 9 is a perspective view of the front portion of the vehicle body showing a developed state of the fall prevention net of the third embodiment of the hood airbag device equipped with the fall prevention means of the present invention.

FIG. 10 is an enlarged cross-sectional side view of a main part of FIG. 9 showing a stored state of the fall prevention net.

FIG. 11 is a plan view of the airbag of FIG. 9 when not deployed.

FIG. 12 is a perspective view of a vehicle equipped with a conventional airbag device having a fall prevention function.

FIG. 13 is an explanatory diagram showing a deployed state of the airbag.

[Explanation of symbols]

 11 Vehicle Body 14 Hood 16 Hood Airbag 17 Roof 18 Fall Prevention Net 19 Storage Section 20 Wire 23 Winding Device 24 A Pillar 25 Seat 26a Rope 30 Arm 33 Arm Drive Device 38 Fall Prevention Net 40 Arm 43 Cowl Section 44 Storage Section 45 Arm Drive device 48 Fall prevention net

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[Procedure amendment]

[Submission date] June 29, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

[Title of the Invention] Fudoeaba' grayed apparatus

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazuki Uzuki, 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (72) Inventor, Hiroki Ohara 2-1-1 Asahi Town, Kariya City, Aichi Aisin Seiki Co., Ltd. (72) Inventor Michio Inoue No. 1 Nagahata, Ochiai, Kasuga-cho, Nishikasugai-gun, Aichi Toyota Gosei Co., Ltd.

Claims (1)

[Claims] 1. When a signal output when a collision with a pedestrian is detected is received, a hood airbag is deployed on a hood or the like in the front part of the vehicle body, and the pedestrian turns the pedestrian into the hood or the like. In a hood airbag device that absorbs the impact of a secondary collision, the hood airbag operates later than the deployment of the hood airbag, covers a pedestrian on the hood or the like from above, and holds the pedestrian on the hood. A hood airbag device comprising means.