JPH088916Y2 - Front body structure of vehicle with airbag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention considers the entire body structure of a vehicle with an air bag, in particular, the arrangement of an impact detection sensor for determining whether or not to inflate the airbag in the case of a vehicle front collision. The present invention relates to a partial vehicle body structure.

2. Description of the Related Art Some automobiles are equipped with an airbag for protecting an occupant in the event of a frontal collision of a vehicle body.

This airbag protects an occupant by expanding an explosive powder or the like by an output signal of the airbag when the impact detection sensor for detecting a collision detects a predetermined impact or more.

An example of disposing the impact detection sensor will be described with reference to FIG. 6. Reference numeral 1 denotes a front side member, which is a vehicle body skeletal member disposed at a lower side portion of a front portion of the vehicle body.

Reference numeral 2 denotes a radiator core support upper, and a radiator support 3 of a bumper (not shown) is supported on the radiator core support upper 2.

An impact detection sensor 4 is attached near the tip of the front side member 1.

An example of this type of technology is disclosed in Japanese Utility Model Laid-Open No. 64-7053.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above-described conventional vehicle body structure, when the barrier 5 collides with the entire front surface of the vehicle body in the vehicle width direction as indicated by the hatched portion in FIG. The airbag can be appropriately actuated to detect the collision, but it is possible to detect this when the front side member 1 is not impacted as shown by the chain line, for example, when the collision occurs with the pole 6. Can not.

Further, since the front side member 1 is located below the vehicle body, the airbag cannot be properly operated even when an impact force is applied only to the upper portion of the front surface of the vehicle body such as a collision with the rear cargo bed of the truck. .

Therefore, the present invention provides a front vehicle body structure of a vehicle with an air bag, in which the impact detection sensor can function reliably regardless of the situation of a frontal collision of the vehicle.

Means for Solving the Problems An impact detection sensor is provided in each vehicle body frame member arranged in the front-rear direction on the lower side of the front portion of the vehicle body, and another is provided at the substantially central portion of the lateral member arranged above the vehicle body. The impact detection sensor is provided, and a reinforcement for transmitting the impact at the time of a vehicle collision to the rear is arranged between the bumper and the lateral member.

The impact detection sensor provided on the vehicle body frame member detects this on both sides or the lower portion of the front surface of the vehicle body, and the impact detection sensor of the lateral member detects this on the vehicle body central portion or upper portion.

With respect to the impact detection sensor of the lateral member, the impact load applied to the bumper is rapidly transmitted through the reinforcement, and the impact detection sensor can be tuned as a structure in which the reinforcement is deformed by the impact force. .

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 5, a hood ridge panel 7 forming both side walls is provided at a front portion of a vehicle body, and a radiator core support upper panel 8 as a lateral member is provided on an upper edge of the hood ridge panel 7 in the vehicle width direction. Is attached.

A front side member 9 as a vehicle body skeleton member arranged in the front-rear direction is arranged below the hood ridge panel 7.

The radiator core support upper panel 8 is provided with a mounting portion 10 sandwiching the mounting portion of the hood lock, and a fascia support as a bumper of the bumper fascia 11 is provided here.
Twelve are supported.

A well-known impact detection sensor 13 is arranged on the front side member 9.

The impact detection sensor 13 outputs a signal when it detects an impact of a certain level or more, explodes explosive powder, and inflates an airbag (not shown).

As shown in FIG. 3, a bracket is joined to the radiator core support upper panel 8 at a substantially central portion on the back side thereof.
Other impact detection sensor 13 through 14 is bolt 15, natch 16
It is fixed by.

A reinforcement 17 is disposed between the radiator core support upper panel 8 and the fascia support 12 to transmit the impact force acting on the fascia support 12 to the rear during a vehicle frontal collision.

As shown in FIG. 1, the reinforcement 17 is provided with a mounting flange 18 for the fascia support 12 at the front end portion, and at the rear portion, a hat-shaped cross section fixed to the mounting hole 19 of the radiator core support upper panel 8 with bolts 20 and nuts 21. Two leg portions 22 having a shape are provided, and a curved portion 24 is provided from the general portion 23 to the leg portion 22.

A bead in the front-rear direction on the general portion 23 of the reinforcement 17.
25, holes 26 are formed on both sides of the bead 25,
The sensitivity of the impact detection sensor 13 can be tuned depending on the degree of bending of 24, the depth of the bead 25, and the size of the hole 26.

That is, for example, the degree of bending of the bending portion 24 is small,
When the bead 25 is deep and the hole 26 is small, the sensitivity of the impact force detection sensor 13 is enhanced even with a slight impact force.

Here, the details of the attachment part of the above-mentioned reinforcement 17 are
It will be explained with reference to FIGS.

Fig. 4 shows the mounting flange at the front end of the reinforcement 17.
The mounting details of 18 and facia support 12 are shown.

A bumper fascia 11 covering the fascia support 12 is attached to the fascia support 12 by a retainer 27, and a bolt 28 protruding rearward is attached to the retainer 27.

On the other hand, a resin outer plate member 30 that is aligned with the hood panel 29 is attached to the outside of the front end portion of the reinforcement 17,
The bolt 28 is inserted into the nut 32 by penetrating the front end 31 of the outer plate member 30 and the mounting flange 18 of the reinforcement 17.
It has been tightened in.

Incidentally, 33 is a bush, and 34 is a seat on the reinforcement 17 side.

On the other hand, FIG. 5 shows the mounting details of the leg portion 22 of the reinforcement 17 and the radiator core support upper panel 8, and the leg portion 22 of the reinforcement 17 is attached to the mounting hole 19 of the radiator core support upper panel 8 with bolts 20 and nuts. The impact load acting on the reinforcement 17 is tightened at 21, and is transmitted from the leg portion 22 to the bracket 14 and the impact detection sensor 13 via the radiator core support upper panel 8.

 Reference numeral 30 denotes an outer plate member.

According to the structure of the above-described embodiment, even if the central portion of the vehicle front portion collides with the pole 35 and no impact force acts on the front side member 9 as shown in FIG. The air bag functions reliably because it is transmitted from 12 to the radiator core support upper panel 8 through the reinforcement 17 and acts on the impact detection sensor 13 quickly.

Further, as shown by the chain line, even if the impact force is not transmitted to the front side member 9 due to a collision with the barrier 36 having a large ground clearance such as a truck bed, which extends over the entire vehicle width direction, the reinforcement 17 Since the impact detection sensor 13 at the center detects this via the, the airbag also functions normally.

Then, the bending degree of the bending portion 24 of the reinforcement 17 and the hole 26.
The sensitivity of the impact detection sensor 13 (at the central portion) can be changed by changing the size of, the depth of the bead 25, and the like.

Further, since the reinforcement 17 is attached between the fascia support 12 and the radiator core support upper panel 8, the rigidity of the front portion of the vehicle body can be improved.

The impact detection sensor 13 provided on the front side member 9 allows the airbag to quickly function in a normal vehicle frontal collision, as in the conventional case.

As described above, according to the present invention, even in the case of a collision with a pole, for example, when a shock does not act on a vehicle body skeletal member arranged in the front and rear direction on the lower side of the front portion of the vehicle body. This impact force can be transmitted from the bumper to the impact detection sensor via the reinforcement and the seed direction member, so that the airbag can be quickly and reliably operated.

Further, since the sensitivity of the impact detection sensor can be adjusted by changing the shape of the reinforcement, there is an effect that the degree of freedom in sensitivity tuning can be increased.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention, FIG. 1 is an exploded perspective view, FIG. 2 is a plan view, FIG. 3 is an enlarged divided perspective view of an essential part, and FIG. 4 is IV of FIG. Fig. 5 is a sectional view taken along line -IV, Fig. 5 is a sectional view taken along line VV in Fig. 2, and Fig. 6 is a plan view of the prior art. 8 ... Radiator core support upper panel (lateral member), 9 ... Front side member (body frame member), 12
… Facia support (bumper), 13… Impact detection sensor, 17… Reinforce.

Claims (1)

[Scope of utility model registration request] 1. An impact detection sensor is provided on each vehicle body frame member arranged in the front-rear direction on the lower side of the front portion of the vehicle body, and another impact detection sensor is provided at a substantially central portion of a lateral member arranged on the upper portion of the vehicle body. A front body structure of a vehicle with an airbag, wherein a sensor is provided, and a reinforcement for transmitting an impact at the time of a vehicle collision to the rear is arranged between the bumper and the lateral member.