JPH09221000A - Automotive seat belt device - Google Patents

Abstract

(57) An object of the present invention is to provide a seat belt device for an automobile, which has a high energy absorption efficiency for head impact deceleration even if the distance between the pillar panel and the rail is small. A seatbelt anchor plate 5 supporting a seatbelt 3 and the seatbelt anchor plate 5
A seatbelt anchor 41 including a slider 7 for fixing the seat 7 and a rail 43 for supporting the slider 7 so as to be vertically movable along the pillar panel 9, and a lower end portion 13 of the rail 43 is fixed to the pillar panel 9. The upper end portion 45 of the rail 43 is a rivet 4 which can be broken by an input of a predetermined load or more to a bracket 49 fixed to the pillar panel 9.
Being supported through 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seatbelt anchor of a seatbelt device for an automobile.

[0002]

2. Description of the Related Art Conventional seatbelt anchors for automobile seatbelt devices include, for example, those shown in FIGS. 5 to 7 and those disclosed in Japanese Patent Application Laid-Open No. 7-172265.

A seatbelt anchor 1 of a vehicle seatbelt device shown in FIGS. 5 to 7 includes a seatbelt anchor plate 5 for slidably supporting a seatbelt 3, and a slider 7 for fixing the seatbelt anchor plate 5. ,
The rail 11 is embedded in the center pillar 9 as a “pillar panel” and supports the slider 7 so as to be vertically movable along the center pillar 9.

A lower end portion 13 of the rail 11 is fixed by a bolt member 15.

Reference numeral 17 denotes a displacement allowable interval, which is formed between the rail 11 and a reinforcing panel (not shown) of the center pillar 9.

An upper end portion 19 of the rail 11 temporarily exits from the hole 21 formed in the center pillar 9 toward the outside 23 of the vehicle, and again enters into the inside 27 of the vehicle through a hole 25 also formed in the center pillar 9. The crossover portion 29 has a V shape, and a hook portion 31 extending from the crossover portion 29 and hooked in the hole 25.

In such a structure, for some reason, a pressing load F1 of a predetermined value or more is applied to the slider 7 from the inside 27 side toward the outside 23 of the vehicle, so that the hook portion 31 collides with the center pillar 9, but Since the rigidity of the portion 31 is smaller than the rigidity of the transition portion 29, the upper end portion 19 of the rail 11 is deformed and the hook portion 31 is separated from the center pillar 9 as shown in FIG. 6B.

Further, depending on the tensile load F2 applied to the seatbelt anchor plate 5 via the seatbelt 3, the crossover portion 29 is attached to the center pillar 9 outside the vehicle 23.
Since it abuts from the side toward the room 27 side, it is not separated.

As shown by the solid line in FIG. 4, the eastern impact deceleration G with respect to time is a pressing load F1 of a predetermined value or more.
Therefore, the hook portion 31 of the upper end portion 19 of the rail 11
Is deformed, the head deceleration G gradually rises,
By separating from the center pillar 9 and hitting a member (not shown) of the center pillar 9, the second impact value 33 rises, the load is removed 35, and the impact energy is absorbed.

[0010]

However, according to the above-mentioned conventional example, since the hook portion 31 of the upper end portion 19 of the rail 11 is gradually deformed, it takes a long time as shown by the solid line in FIG. As the head deceleration G gradually rises, the energy absorption efficiency is poor.

In order to prevent the rail 11 from colliding with a member (not shown) of the center pillar 9, it is necessary to increase the distance between the center pillar 9 and the rail 11. , That much,
Since the lateral width of the center pillar 9 becomes large, it is necessary to improve the visibility of the exterior 23 from the inside 27 side, and the improvement is required.

If the lateral width of the vehicle outside the vehicle 23 is limited by regulations, the center pillar 9 and the rail 11 are pushed out into the room 27.
Increasing the interval width dimension between and reduces the left-right dimension of the room 27, and improvement is required.

Therefore, the present invention has been made in view of the above points, and an object of the present invention is to reduce the head impact deceleration even if the gap width dimension between the pillar panel and the rail is small. Is to provide a seat belt device for an automobile having high energy absorption efficiency.

[0014]

In order to solve the above-mentioned problems, the invention of claim 1 is directed to a seat belt anchor plate for slidably supporting a seat belt, a slider for fixing the seat belt anchor plate, and a pillar. A seatbelt anchor including a rail that supports a slider so as to be vertically movable along a panel, wherein a lower end of the rail is fixed to a pillar panel, and an upper end of the rail is fixed to the pillar panel. It is characterized in that it is supported via a rivet that can be broken by an input of a predetermined load or more.

Therefore, according to the first aspect of the invention, when the seat belt anchor plate is applied with a pressing load of a predetermined value or more from the indoor side, the rivet withstands the pressing load, so that the initial load is early. Since the rivet breaks under a certain load, the energy absorption efficiency for head impact deceleration is significantly improved.

Further, since the function of absorbing the impact energy, that is, unloading the load is performed by breaking the rivet, a large stroke is not required, so that it is possible to provide a seat belt device for an automobile in which the lateral dimension of the pillar panel is small. Become.

According to a second aspect of the invention, there is provided the vehicle seat belt device according to the first aspect, wherein the bracket is formed with a claw portion which is engaged with the rail through a penetrating portion. And

Therefore, according to the second aspect of the present invention, after the rivet is broken under a certain load, the rail penetrating portion has a rotating hinge function with respect to the bracket, so that the load can be removed without bottoming. .

[0019]

As is apparent from the above, according to the invention of claim 1, the seat belt anchor plate for slidably supporting the seat belt, the slider for fixing the seat belt anchor plate, and the pillar panel are provided. A seat belt anchor including a rail that supports the slider so that the slider can move up and down, the lower end of the rail is fixed to the pillar panel, and the upper end of the rail has a predetermined load on a bracket fixed to the pillar panel. Since it is supported via a rivet that can be broken by the above input, when a pressing load of a predetermined value or more is applied to the seat belt anchor plate from the indoor side, the rivet is pressed against the pressing load. Since the initial load increases early and the rivet breaks under a certain load, energy absorption of head impact deceleration is absorbed. The rate will be significantly better.

Further, since the function of absorbing the impact energy, that is, unloading the load is performed by breaking the rivet, a large stroke is not required, so that it is possible to provide a seat belt device for an automobile in which the lateral dimension of the pillar panel is small. Become.

[0021] According to the invention of claim 2, the bracket is formed with a claw portion which is engaged through the penetrating portion of the rail. Therefore, the effect according to claim 1 is obtained. In addition, after the rivet is broken under a certain load, the rail penetrating portion with respect to the bracket has a rotating hinge function, so that the load can be removed without bottoming.

As described above, it is possible to provide a vehicle seat belt device which has a high energy absorption efficiency for head impact deceleration even if the gap width between the pillar panel and the rail is small.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a vehicle seat belt device according to a first embodiment of the present invention.

That is, the seatbelt anchor 41 of the vehicle seatbelt device includes a seatbelt anchor plate 5 for slidably supporting the seatbelt 3, a slider 7 for fixing the seatbelt anchor plate 5, and a "pillar panel". A rail 43 embedded in the center pillar 9 and supporting the slider 7 so as to be vertically movable along the center pillar 9.

The lower end 13 of the rail 43 has a nut 9a fixed to the center pillar 9 by a bolt member 15.
It is fastened and fixed to.

A through hole 63 formed in the upper end portion 45 of the rail 43 and a through hole 65 formed in the lower end portion 57 of the bracket 49 have a rivet 47 which can be broken by an input of a predetermined load or more. Be supported.

The upper end 51 of the bracket 49 is
It is fixed by a bolt 55 fastened to a nut 53 fixed to the center pillar 9, and at a lower end portion 57,
A claw portion 61 is formed which is engaged through the penetrating portion 59 of the rail 43 and has a predetermined protruding dimension.

The rivet 47 is capable of withstanding an initial load 67 of 300 to 500 kilograms and is capable of breaking after being made of aluminum or iron. The breaking load is determined.

Because of the configuration of the first embodiment,
For some reason, a pressure load F1 of a predetermined value or more (for example, 900 kg for 200 G when the weight of the occupant's head is 4.5 kg) is applied to the seatbelt anchor plate 5 from the inside 27 toward the outside 23 of the vehicle. As a result, the seat belt anchor plate 5 slightly moves in the direction 23 outside the vehicle with the movement of the rail 43, but maintains that position until the rivet 47 breaks.

With this holding force, as shown by the broken line in FIG. 4, which shows the correlation of the head deceleration G with respect to the impact time T,
The initial load 67 increases, and thereafter, as shown in FIG. 2, the rail 43 is moved by breaking the rivet 47, and the pressing load F1 is unloaded without bottoming. The energy absorption efficiency of the shock deceleration G is remarkably improved.

Even if the rivet 47 breaks, the rail 4
3 does not perform any automatic operation, but as shown in FIG.
Will be held in the pulled position.

Further, since the function of absorbing the impact energy, that is, the function of unloading, does not require a large stroke, the right and left dimensions of the center pillar 9 can be reduced.

For some reason, a tensile load F2 of a predetermined value or more (for example, 1200 kg) is applied to the seatbelt anchor 41 from the outside 23 side toward the interior 27 via the seatbelt 3 for some reason. The plate 5 moves as the rail 43 moves.
Move slightly to the room 27 side.

However, the rail 43 is attached to the bracket 49.
Since the upper end 45 of the rivet 47 is in contact with the surface, the rivet 47 does not break and holds its position.

As described above, there is a practical effect that the seat belt device for an automobile has a high energy absorption efficiency for head impact deceleration even if the gap width between the pillar panel and the rail is small.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view of a vehicle seat belt device according to a first embodiment of the present invention.

FIG. 2 is an operation explanatory view of FIG. 1;

3 is a perspective explanatory view showing an engagement relationship between an upper end portion of the rail of FIG. 1 and a bracket.

FIG. 4 is a diagram showing a correlation between an elapsed time from an impact and a head deceleration according to a conventional example and an embodiment of the present invention.

FIG. 5 is a perspective explanatory view of a conventional seat belt device for an automobile.

FIG. 6 is an equivalent cross-sectional explanatory view taken along the line SA-SA of FIG.

FIG. 7 is an operation explanatory view of FIG. 6;

[Explanation of symbols]

 3 Seat belt 5 Seat belt anchor plate 7 Slider 9 Center pillar as a "pillar panel" 13 Lower end of rail 15 Bolt member 23 Outside the vehicle 27 Indoor 41 Seat belt anchor of automobile seat belt device 43 Rail 45 Upper end of rail 47 Rivet 49 bracket 51 upper end of bracket 57 lower end of bracket 59 rail penetration 61 claw 63 through hole formed at upper end of rail 65 through hole formed at lower end of bracket 67 initial load F1 pressing load F2 tension load

Claims (2)

[Claims] 1. A seatbelt anchor including a seatbelt anchor plate that slidably supports a seatbelt, a slider that fixes the seatbelt anchor plate, and a rail that vertically supports the slider along a pillar panel. The lower end of the rail is fixed to a pillar panel, and the upper end of the rail is supported by a bracket fixed to the pillar panel via a rivet that can be broken by an input of a predetermined load or more. Seatbelt device for automobiles characterized by: 2. The automobile seat belt device according to claim 1, wherein the bracket is formed with a claw portion that is engaged with the bracket through a penetrating portion of the rail. Belt device.