JPH1029499A - Mounting structure of collision sensor for automobile - Google Patents

Abstract

(57) [Problem] To provide a collision sensor mounting device capable of detecting a collision with high accuracy without impairing the reinforcing strength of a vehicle body by a floor frame. SOLUTION: A floor frame 3 made of a channel material having an open upper surface and extending in the front-rear direction is fixed to a lower surface of a floor panel 2 to form a closed cross section. A collision sensor 5 is inserted into the closed section through an opening 4 provided near the front end of the floor panel 2.
And the opening 4 is covered with the cover plate 6 so that the floor frame 3
In this case, water or foreign matter is prevented from entering the closed section, which is the mounting space for the collision sensor 5, while preventing the strength from being lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a collision sensor for an automobile, and more particularly to a mounting structure capable of obtaining high detection accuracy without impairing the strength of a vehicle body.

[0002]

2. Description of the Related Art As a conventional example of a mounting structure of an automobile collision sensor, as disclosed in Japanese Patent Application Laid-Open No. 5-139241, an opening or a concave portion is provided at a front end of a front frame, and through the opening or the concave portion. There is one in which part or all of a collision sensor is incorporated inside a front frame.

However, when an opening or a recess is provided at the front end of the front frame to partially or entirely incorporate the collision sensor in the front frame, the accuracy of detection by the collision sensor can be improved. However, if an opening or a recess is provided for mounting the collision sensor, the rigidity of the front frame is reduced by the opening or the recess, so that there is a problem that the reinforcing effect of the front frame is reduced and the strength of the vehicle body is impaired.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a mounting structure for a collision sensor capable of obtaining high detection accuracy without impairing the strength of a vehicle body. And

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a vehicle equipped with a collision sensor for detecting an impact applied to a vehicle body. The frame is fixed to the lower surface of the floor panel to form a closed section, and a collision sensor is incorporated into the closed section from an opening provided near the front end of the floor panel, and the opening is covered with a cover plate. .

When the collision sensor is incorporated in a closed section of the floor frame, the collision sensor is fixed to the bottom wall of the floor frame, or mounting legs projecting from the left and right sides of the collision sensor are provided on the floor frame. It is possible to adopt various modes such as fixing to a flange formed on the edge or attaching a collision sensor to the lower surface of the cover plate, and attaching a stiffener to the front end of the floor frame to couple with the front cross member. There is an advantage that the detection accuracy of the collision sensor can be further increased by reinforcing the portion and incorporating the collision sensor in each of the above-described modes in the portion reinforced by the stiffener.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic perspective view showing a first embodiment of a mounting structure of an automobile collision sensor according to the present invention,
FIG. 2 is an enlarged perspective view of a main part of FIG.

In these figures, a floor frame 3 is fixed to the lower surface of a floor panel 2 of a cab 1 of a cab-over type vehicle along a vehicle longitudinal direction. The floor frame 3 is made of a channel material having an open upper surface, and is fixed along the front-rear direction by welding and fixing an outward flange 3a provided at an upper edge of the floor frame 3 to a lower surface of the floor panel 2. This is to strengthen the floor panel 2 by forming a closed cross section. Usually, the floor frame 3 is fixed at a symmetrical position with respect to the center of the vehicle body to provide a well-balanced reinforcement.

An opening 4 is provided near the front end of the floor panel 2 so that the closed section communicates with the passenger compartment. A mounting leg 5a projecting in the front-rear direction of the vehicle from the bottom of the collision sensor 5 installed in the closed cross section from the opening 4 is fastened and fixed to the bottom wall 3b of the floor frame 3 by a screw (not shown).

Further, a cover plate 6 covering the opening 4 is fastened and fixed to the upper surface of the floor panel 2 with screws (not shown). The cover plate 6 is provided with a hole 6a for penetrating a harness (not shown) connected to the collision sensor 5. In addition, a gap between the hole 6a and the harness is sealed with a grommet (not shown), and a packing (not shown) is sandwiched between the floor panel 2 and the cover plate 6 to prevent foreign matter from entering the closed cross section from the vehicle compartment side. I try to avoid it. 7 is a front panel, 8 is a dash panel, 9 is a front cross member, and 10 is a front pillar.

In the mounting structure of the vehicle collision sensor configured as described above, the impact applied to the front cross member 9 is transmitted to various parts of the vehicle body via the floor frame 3, and the magnitude of the impact at this time is reduced. A corresponding signal is supplied from the collision sensor 5 to a controller (not shown). The controller determines the level of the impact based on the signal supplied from the collision sensor 5, and activates a protection device such as an airbag when it determines that the impact has reached a danger level greater than a predetermined value. To ensure the safety of the occupants.

The floor panel 2 and the floor frame 3
When the collision sensor 5 is mounted in the closed cross section formed by the above, the opening 4 for incorporating the collision sensor 5 is provided in the floor panel 2 in the present invention. Accordingly, the reinforcing effect of the floor frame 3 is improved as compared with the conventional example in which an opening with a decrease in strength is provided in the floor frame, so that a decrease in body strength is prevented.

Since the opening 4 provided in the floor panel 2 for incorporating the collision sensor 5 is covered with the cover plate 6, the washing water or foreign matter in the vehicle interior is a closed cross section in which the collision sensor 5 is mounted. No intrusion. Furthermore, the mounting leg 5a provided in the collision sensor 5 in the front-rear direction of the vehicle as in the above embodiment is attached to the floor frame 3
In this case, since the impact inputted to the floor frame 3 is directly and efficiently transmitted to the collision sensor 5, the detection accuracy of the collision by the collision sensor 5 is higher. There are advantages that can be.

FIG. 3 is an exploded perspective view of a main part showing a schematic configuration of a second embodiment of the mounting structure of the vehicle collision sensor according to the present invention, and FIG. 4 is a sectional view showing a fixed state of the collision sensor. In this embodiment, mounting legs 5a are provided on both sides of the upper end of the collision sensor 5 so as to protrude outward. Then, the mounting leg 5a is tightened and fixed to the flange 3a formed on the upper edge of the floor frame 3 with the screw 5b, so that the mounting workability of the collision sensor 5 is increased without impairing the fixing strength. In FIG. 4, reference numeral 6b denotes a packing sandwiched between the floor panel 2 and the cover plate 6.

FIG. 5 is a schematic perspective view showing a third embodiment of the mounting structure of the vehicle collision sensor according to the present invention. In the present embodiment, the collision sensor 5 is attached to the lower surface of the cover plate 6. The collision sensor 5 is attached using a fastening means such as a screw (not shown), or
Arbitrary means such as welding the mounting leg 5a to the cover plate 6 can be adopted.

Therefore, in the case of the third embodiment shown in FIG. 5, the collision sensor 5 is fixed to the lower surface of the cover plate 6, and then the cover plate is attached to the opening 4 of the floor panel 2 to attach the collision sensor 5 to the floor panel 2. Since it is sufficient to store the collision sensor 5 in a closed section by the floor frame 3, the mounting workability of the collision sensor 5 is further improved. Reference numeral 6c denotes a grommet for sealing a gap between the hole 6a provided in the cover plate 6 and the harness 5c of the collision sensor 5.

FIG. 6 is a plan view showing a fourth embodiment of the mounting structure for an automobile collision sensor according to the present invention, and FIG.
FIG. 8 is a sectional view taken along line BB of FIG. 7. In the present embodiment, a stiffener 11 is superposed and fixed on the front end surface of the floor frame 3 to reinforce the joint with the front cross member 9. A mounting leg 5a protruding from the upper part of the collision sensor 5 in the front-rear direction of the vehicle body is fastened and fixed to a lower surface of the cover plate 6 with a screw 5b, and the cover plate 6 is provided on an upper edge of the stiffener 11 by a flange 11a. The opening 4 is closed by tightening and fixing screws 6 d to the floor frame 3 reinforced with the stiffener 11.
The collision sensor 5 is mounted in the front end of the vehicle.

Therefore, in the case of the present embodiment, the rigidity between the front cross member 9 which is the input point of the impact and the mounting position of the collision sensor 5 can be increased to prevent the deformation of the floor frame 3 due to the impact. Therefore, the detection accuracy of the collision sensor 5 is further increased. When the collision sensor 5 is provided with mounting legs 5a projecting in the front-rear direction of the vehicle body as shown in the present embodiment, and the mounting legs 5a are fastened and fixed to the lower surface of the cover plate 6 with screws 5b. , First
While increasing the impact detection accuracy as in the case of the embodiment,
As in the case of the third embodiment, the mounting workability of the collision sensor 5 can be improved.

[0019]

As apparent from the above description, according to the present invention, the collision sensor is incorporated into the closed section formed by the floor panel and the floor frame from the opening provided in the floor panel, and the opening is formed by the cover plate. The collision sensor can be accurately mounted on the floor frame without impairing the reinforcing effect of the floor frame, and the collision detection accuracy can be increased. Water or foreign matter can be accurately prevented.

Further, when the collision sensor is fixed to the bottom wall of the floor frame as in the second aspect of the invention, since the impact applied to the floor frame is directly transmitted to the collision sensor, There is an advantage that the detection accuracy of can be increased.

Further, in the case where the mounting legs projecting from the left and right sides of the collision sensor are fixed to the flange formed on the upper edge of the floor frame as in the third aspect of the present invention,
Alternatively, when a collision sensor is mounted on the lower surface of the cover plate as in the invention described in claim 4, the mounting workability can be further improved without impairing the impact detection accuracy of the collision sensor.

Furthermore, a stiffener is attached to the front end of the floor frame to reinforce the joint with the front cross member, as in the fifth aspect of the invention.
If the collision sensor is incorporated into the portion reinforced by the stiffener, the rigidity between the front cross member, which is the point of impact input, and the mounting position of the collision sensor can be increased. There is an advantage that the detection accuracy can be further increased.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a first embodiment of a mounting structure for an automobile collision sensor according to the present invention.

FIG. 2 is an enlarged perspective view of a main part of FIG. 1;

FIG. 3 is an exploded perspective view of a main part showing a schematic configuration of a second embodiment of the mounting structure for an automobile collision sensor according to the present invention.

FIG. 4 is a sectional view showing a fixed state of the collision sensor having the mounting structure shown in FIG. 3;

FIG. 5 is a schematic perspective view showing a third embodiment of the mounting structure for a vehicle collision sensor according to the present invention.

FIG. 6 is a plan view showing a fourth embodiment of the mounting structure for an automobile collision sensor according to the present invention.

FIG. 7 is a sectional view taken along line AA of FIG. 6;

FIG. 8 is a sectional view taken along the line BB of FIG. 7;

[Explanation of symbols]

 Reference Signs List 1 cab 2 floor panel 3 floor frame 3a flange 3b bottom wall 4 opening 5 collision sensor 5a mounting leg 5b screw 5c harness 6 cover plate 6a hole 6b packing 6c grommet 7 front panel 8 dash panel 9 front cross member 10 front pillar 11 stiffener Flange

Claims (5)

[Claims] In a vehicle equipped with a collision sensor for detecting an impact applied to a vehicle body, a closed frame is formed by fixing a floor frame made of a channel material having an open upper surface and extending in a front-rear direction to a lower surface of a floor panel. With
A collision sensor mounting structure for an automobile, wherein a collision sensor is incorporated into the closed section from an opening provided near a front end of the floor panel, and the opening is covered with a cover plate. 2. The mounting structure for an automobile collision sensor according to claim 1, wherein the collision sensor is fixed to a bottom wall of the floor frame. 3. The mounting structure for a vehicle collision sensor according to claim 1, wherein mounting legs projecting from both sides of the collision sensor are fixed to flanges formed on an upper edge of the floor frame. 4. The mounting structure for a vehicle collision sensor according to claim 1, wherein a collision sensor is mounted on a lower surface of the cover plate. 5. The stiffener according to claim 1, wherein a stiffener is attached to a front end of the floor frame to reinforce a joint with the front cross member, and a collision sensor is incorporated in a portion reinforced by the stiffener. Or 1
14. A mounting structure for a vehicle collision sensor according to any one of the preceding items.