JPS5824608Y2 - Automobile seat belt mounting structure - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a mounting structure in which a pillar supporting the upper end of a shoulder belt in a three-point seat belt installed in an automobile is reinforced.

Automobile seat belts are required to restrain occupants against impact during a collision.

However, since the pillar that supports the upper end of the three-point seat belt (the upper end of the shoulder belt) is made by joining and fixing an inner panel and an outer panel made of thin plates, it is not possible to leave the seat belt anchor as is. If it is fixed to the inner panel of the pillar, the inner panel may be torn and destroyed by the shock at the time of a collision, and the supporting function may be lost.

Therefore, conventionally, as shown in FIG. 5, for example, a reinforcement B having a rising portion A formed on its periphery is spot welded to the outer surface of the inner panel (the surface facing the outer panel), and is also welded to the reinforcement B. Drill an insertion hole in the inner panel that overlaps with the threaded hole of the nut C, and place a belt anchor in contact with the outer surface of the panel (the surface exposed to the passenger compartment), and then tighten the bolt inserted through this anchor into the nut. The anchor was fixed in place.

In this type of conventional attachment structure, the tension of the seat belt is diffused through the reinforcement, so the inner panel can be reinforced to some extent, but if the collision energy becomes extremely large, the inner panel A large shearing force acts between the support part of the reinforcement and other parts of the panel, causing the inner panel to break or the spot on the flange that joins the inner panel to the outer panel to peel off, causing the support function to be lost. I had something to lose.

This idea was made in view of the actual situation,
The purpose is to significantly increase the support strength of the seatbelt by simply changing the shape of the reinforcement without adding any special parts, thereby increasing the reliability of the seatbelt.

Hereinafter, this invention will be explained in detail based on an embodiment shown in FIGS. 1 to 4.

In the figure, reference numeral 1 denotes an automobile pillar, in which an inner panel 2 and an outer panel 3 are joined at a flange portion and fixed by spot welding, as in the conventional case.

Reference numeral 4 denotes a reinforcement fixed to the inner surface of the inner panel 2 (the surface facing the outer panel 3) by spot welding, and is formed into a horizontal trapezoid shape with a leading edge sufficiently wider than a trailing edge. has been done.

A rising portion 5 rising toward the outer panel 3 is formed on the entire periphery of this reinforcement 4, but the height of the rising portion 5 on the front edge formed wide as described above is different from that of the other It is formed lower than the rising portions 5 of the upper and lower edges and the rear edge.

Therefore, the vicinity of the front edge of the reinforcement 4 has lower rigidity than other parts.

Further, a nut 6 is welded and fixed to a substantially central portion of the reinforcement 4 so that a screw hole is aligned with an insertion hole (not shown) drilled in the inner panel 2, and a nut 6 is welded and fixed to a substantially central portion of the reinforcement 4. By bending the reinforcing member 4 in a direction parallel to the inner panel 2, the overall rigidity of the reinforcement 4 is increased, but the vicinity of its front edge is still formed to be weaker than other parts.

Pillar 1 to which reinforcement 4 of such a configuration is fixed
Place an anchor (not shown) in contact with the outer surface (surface exposed to the passenger compartment) of the inner panel 2, and tighten the tightening bolt (not shown).
is screwed into the nut 6 in the same manner as before, the anchor is tightened and fixed, and the upper end of the shoulder belt is fixed to this anchor.

The load applied to the anchor installed in this manner is transmitted to the inner panel 2 via the reinforcement 4.

At this time, since the leading edge of the reinforcement 4, that is, the end in the direction in which the load at the time of a collision acts as a compressive force, is formed wider than the width of the opposite edge, the load is more dispersed and the inner panel 2 can be conveyed.

Therefore, even when the reinforcement 4 is installed close to the joint between the inner panel 2 and the outer panel 3, the unit stress for the spot welding that joins and fixes both panels 2 and 3 can be reduced. Not only can peeling be prevented, but also damage and deformation of the inner panel 2 can be prevented.

In addition, the height of the rising portion 5 on the leading edge of the reinforcement 4 is lower than the height of the rising portion 5 on other parts to reduce the rigidity, so that the concentration of stress at the leading edge portion of the reinforcement 4 is reduced. Since the load can be prevented and the load can be further dispersed, deformation of the inner panel 2 and the joint portion between the inner panel 2 and the outer panel 3 can be more reliably prevented.

As explained above, according to this invention, the reinforcement that reinforces the inner panel of the pillar is formed into a horizontal trapezoid shape, and a rising part toward the outer panel of the pillar is provided on the entire periphery of the reinforcement. The height of the rising part of the widened leading edge is lower than the height of the rising parts of other parts, so the load transmitted from the seat belt can be sufficiently distributed and transmitted to the inner panel, thereby preventing collisions. Even when a large impact force is applied, the seat belt can be stably supported, improving the stability of the occupant.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an automobile equipped with an embodiment of this invention;
Figure 2 is a perspective view of the main parts of Figure 1, Figure 3 is a perspective view of the same reinforcement, Figure 4 is a sectional view taken along IV-IV in Figure 3, and Figure 5 is a conventional reinforcement. It is a perspective view showing an example. 1... Pillar, 2... Inner panel,
4...Reinforcement, 5...
Rising part, 6... Narato.

Claims (1)

[Scope of utility model registration request] A reinforcement with a nut fixed to it is fixed to the inner surface of an inner panel that constitutes a part of the pillar, and a bolt inserted through a seatbelt anchor is screwed into the nut through an insertion hole drilled in the inner panel to secure the anchor. In an automobile in which the reinforcement is tightened and fixed to the inner surface of the pillar, a rising portion toward the outer panel of the pillar is provided on the entire periphery of the reinforcement, and the width of the front edge of the reinforcement is made wider than the width of the rear edge. Also, an attachment structure for an automobile seat belt, characterized in that the height of the rising portion at the front edge of the reinforcement is lower than the height of the rising portion at other portions.