JP2707923B2 - Impact sensor mounting structure for side airbag device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collision sensor of a side airbag device for protecting an occupant from a secondary collision with a side wall of a vehicle cabin at the time of a side collision. The present invention relates to a structure for mounting to a side impact beam provided in a side door.

[0002]

2. Description of the Related Art An example of a conventional collision sensor for a side airbag device is described in the specification attached to Japanese Patent Application No. 3-160143. The collision sensor 1 described herein outputs a detection signal by detecting a side collision, as shown in FIGS. 6 to 8, and has a thin square pipe shape that is relatively easily deformed. Contact points 1a and 1b are formed on inner surfaces of the collision sensor 1 which are close to each other and opposed to each other. When the collision sensor 1 is crushed by a collision load, the two opposite contacts 1a and 1b conduct, a side collision is detected, and the detection signal output ignites the gas generating agent in the inflator.

Further, the collision sensor 1 includes a side door 2
Between the outer panel 3 of the side door 2 and the side impact beam 4 made of a round steel pipe provided substantially horizontally just inside the outer panel 3. It is fixedly mounted on the side with a bolt and nut 6 via a bracket 5.

[0004]

However, in the above-described mounting structure of the conventional collision sensor 1, the fastening operation to the side impact beam 4 has to be performed twice.
Further, since there is no mechanism for temporarily fixing the collision sensor 1 which is the member to be fastened to the side impact beam 4 when fastening the bolt, the impact sensor 1 is supported by one hand while the impact wrench is supported by the other hand. Has to be operated, so that the workability is poor, and there is a problem that the fastening work takes time.

[0005] Further, since the ends of the band-shaped bracket 5 are fastened by bolts on both sides of the long collision sensor 1 disposed substantially horizontally, the bracket 5 and the bolt nut 6 project vertically. Will be done. As a result, as shown in FIG. 8, when a vehicle whose bumper is at a high position has a side collision, the vehicle collides above the side impact beam 4 and the outer panel 3 is pulled toward the collision location. 3 is caught by the protruding bracket 16 and the bolt nut 6, which hinders smooth movement, which is not preferable.

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 of a collision sensor which is easy to mount and excellent in workability.

[0007]

According to the present invention, as a means for solving the above problems, a collision sensor for detecting a side collision of a vehicle faces an inner surface of an outer plate in a side door of a vehicle body. In the collision sensor mounting structure of the side airbag device which is mounted on a fixing member provided in the collision sensor, the collision sensor is provided with a latch portion on an upper side thereof and a bolt fastening portion on a lower side thereof. A hook portion for hooking the hook portion of the collision sensor,
In this latched state, a fastening substrate to be bolted together with the fastening portion is attached in advance.

Further, the collision sensor provided with the latching portion and the fastening portion, when attached to the fixing member,
The upper and lower portions of the collision sensor are housed in a fan shape exceeding 50 degrees inward from above and below the inner surface of the outer plate.

[0009]

As described above, in the collision sensor mounting structure, the collision sensor is provided with the locking portion for locking the side impact beam locking device and the fastening portion for fastening together with the fastening substrate. Since the collision sensor can be temporarily fixed to the side impact beam by locking the locking portion to the locking portion, the fastening operation of the bolt and nut using an impact wrench or the like is facilitated.

Further, if the upward and downward projections of the collision sensor fall within a fan shape exceeding 50 degrees inward from the upper and lower sides of the inner surface of the outer plate, respectively, the upward and downward projections of the collision sensor can be prevented. The smooth movement of the outer plate at the time of a side collision is ensured, and the collision is detected early.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a mounting structure of a collision sensor for a side airbag device according to the present invention will be described below with reference to FIGS.

The collision sensor 11 of the vehicle side airbag device includes a primary sensor 11a and a secondary sensor 1
The collision sensor 11 is provided in the side door 13 on the side of the vehicle body and the like, and when crushed by a collision load, one side surface of a long secondary sensor 11a that is turned on when the contact is conducted. And multiple primary sensors 1
1a are provided at predetermined intervals, and the secondary sensor 1
1b, it is crushed by a smaller force, and a collision is detected.

The collision sensor 11 configured as described above
Is mounted on a side impact beam 14 made of a round steel pipe disposed substantially horizontally in the side door 13 via a belt-shaped bracket 15 for mounting a sensor. The bracket 15 is formed by bending both ends of a steel strip bent in an inner diameter dimension in close contact with the outer periphery of the side impact beam 14 into a hook shape, and a portion of the side surface of the side impact beam 14 on the vehicle body inner side. The upper end thereof has a claw-shaped locking portion 15a formed in a substantially vertical direction, and the lower end thereof is slightly inclined from the vertical by a fastening board 15b having a bolt hole formed therein. The shaft L passing through the bolt hole is attached so as to slightly face upward in the vehicle body (to the left in FIG. 1).

The collision sensor 11 is provided with a U-shaped mounting arm 16 made of steel strip which is inserted in the secondary sensor 11b at right angles to the collision sensor 11 (see FIG. 3). Hook hole 1 formed at one end of this mounting arm 16
6a is hooked on a hook 15a on the upper end of the bracket 15. In addition, this retaining hole 16a
In FIG. 4, a rubber or plastic grommet 18 as shown in FIG.
When the holes 16a are hooked, the noise generated when the metals rub against each other due to vibration is prevented,
Prevents the generation of rust due to peeling of paint and plating.

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

As shown in FIG. 2, the collision sensor 11 has a U-shaped mounting arm 16 made of steel strip inserted in the secondary sensor 11b in a direction perpendicular thereto, and has a locking hole 16a formed at one end thereof. Is hooked on the hooking portion 15a at the upper end of the bracket 15, and the side of the fastening portion 16b where the nut is welded is placed between the side impact beam 14 and the inner surface of the outer panel 13.
Insert while rotating so as not to contact with

Then, the fastening hole 16a at the upper end of the mounting arm 16 is hooked to the hooking portion 15a, and the fastening portion 16b at the lower end is connected to the bracket 15 with the collision sensor 11 facing the inner surface of the outer panel 13. When the bolt 17 is screwed from the side of the fastening substrate 15b in a state of being brought into close contact with the fastening substrate 15b, the collision sensor 11 locks the upper and lower portions respectively to the bracket 15 and , And can be attached with its back surface in close contact. Therefore, at the time of a side collision, the outer sensor 13 is pressed by the outer panel 13 which is deformed by the collision load, and is pinched between the side impact beam 14. As a result, the contacts become conductive and a collision is detected.

Further, in this collision sensor 11, since the mounting arm 16 is formed substantially U-shaped along the outer diameter of the side impact beam 14, as shown in FIG. Are not protruded from the collision sensor 11 in the vertical direction. Therefore, when a side collision occurs, if the height of the bumper of the vehicle that has made a side collision is higher or lower than the side impact beam 14, when the outer panel 13 is pulled toward the collision point and moves, Since there is no obstacle that hinders this movement, it moves smoothly, and the outer panel 13 is pressed by the collision sensor 11 to be crushed, so that the collision can be detected early.

In this case, it is preferable that the angle θ formed between the vertical end of the collision sensor 11 and the outer panel 13 is at least about 50 degrees or more.

The fastening board 15b of the bracket 15
And the fastening portion 16b to be abutted with the bolt hole are formed so that the axial direction of the bolt hole is slightly upward from the horizontal direction, so that a bolt fastening operation performed using a tool such as an impact wrench is required. It will be easier.

In this embodiment, the case where the collision sensor 11 is mounted on the side impact beam 14 has been described. However, the present invention can be applied to a case where the collision sensor 11 is mounted on a fixing member in another side door.

[0022]

As described above, the collision sensor mounting structure of the side airbag device according to the present invention is provided with a latch portion on the upper side of the collision sensor and a bolt fastening portion on the lower side to fix the collision inside the side door. Since it is fastened to the fastening board after being hooked on the hooking portion on the member side, the bolt can be fastened with the upper portion of the collision sensor temporarily fixed, so that the mounting work becomes easy. Also, since the mounting arm on the collision sensor side is formed in a substantially U-shape to eliminate the vertical projection of the collision sensor, the collision direction at the time of a side collision at a position deviated from the height of the collision sensor is reduced. The outer panel, which is pulled to the side, smoothly moves and immediately crushes the collision sensor, so that a side collision can be detected early.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a collision sensor mounted on a side impact beam according to an embodiment of the mounting structure of the present invention.

FIG. 2 is an explanatory diagram showing a process of attaching a collision sensor to a side impact beam.

FIG. 3 is a perspective view showing a state in which a collision sensor is attached to a side impact beam.

FIG. 4 is an explanatory diagram showing a surrounding space when a collision sensor is attached to a side impact beam.

FIG. 5 is a sectional view showing an example of a grommet for soundproofing and rustproofing.

FIG. 6 is a partially cutaway perspective view of a side door showing a conventional collision sensor mounting structure.

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

FIG. 8 is an explanatory diagram showing a state of a collision sensor attached by a conventional attachment structure at the time of a side collision to a high position.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Touch sensor 12 Side door 13 Outer panel 14 Side impact beam 15 Bracket 15a Hanging part 15b Fastening board 16 Mounting arm 16a Hanging part 16b Fastening part 17 Bolt 18 Soundproof / rustproof grommet

Claims (2)

(57) [Claims] 1. A collision sensor mounting device for a side airbag device, wherein a collision sensor for detecting a side collision of a vehicle is mounted on a fixing member disposed facing an inner surface of an outer plate in a side door of a vehicle body. In the structure, the collision sensor is provided with a latching portion on an upper side thereof and a bolt fastening portion on a lower side thereof, and the fixing member is a latching portion for latching the latching portion of the collision sensor, A collision sensor mounting structure for a side airbag device, wherein a fastening board to be bolted together with the fastening portion in this hooked state is mounted in advance. 2. The collision sensor having the latch portion and the fastening portion, wherein when the collision sensor is attached to the fixing member, portions protruding upward and downward from the collision sensor inward from the inner surface of the outer plate, respectively. 2. A collision sensor mounting structure for a side airbag device according to claim 1, wherein the collision sensor is accommodated in a fan-shaped range exceeding 50 degrees.