JPH0129160Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a structure for attaching a seat belt anchor to an automobile.

The mounting structure of this type of seatbelt anchor is a nut plate with a nut fixed to the back.
There is a known structure in which the seat belt is fixed to the inner surface of the inner plate, and the inner plate is welded and fixed to the outer plate, and the tip of the seat belt is bolted to the nut. When a load is applied to the seatbelt, this load is applied to the inner plate via the nut plate, so the load is applied to the spot weld between the inner plate and the outer plate in the direction of separation, resulting in a collision. When a high load is applied in the event of an accident, the inner plate may peel off from the outer plate.

In order to eliminate the above-mentioned disadvantages, a nut plate having a U-shaped cross section and having side pieces on both sides of the base is provided, and the length of the side pieces is made larger than the length of the base so as to protrude in the axial direction, This protrusion is fixed to the inner surface of the outer plate by spot welding, and the inner plate is fixed to the outer plate, so that the load applied to the seat belt is applied to the inner plate via the nut plate. At the same time, Jikosho developed a system in which the action was distributed to the outer plate, which has a large rigidity.
No. 54-25768.

The object of this invention is to provide a seatbelt anchor attachment structure for an automobile that is more robust than the seatbelt anchor attachment structure disclosed in the above-mentioned Japanese Utility Model Publication No. 54-25768.

Embodiments of this invention will be described below with reference to the drawings.

In FIG. 1, 1 is an inner panel, 2 is an outer panel, and these two panels 1 and 2 are joined to each other by spot welding or the like to constitute a column member 3 having a closed cross section.

Reference numeral 4 indicates a stiffener, and the stiffener 4 is a long one having a substantially U-shaped cross section as shown in FIG.
It is fixed to both sides 2a and 2b by spot welding or the like.

5 indicates a nut plate. This nut plate 5 is formed into a substantially U-shaped cross section, and has a through hole 7 bored in the center of its base 6, and a nut 8 is fixed to the back surface of the base 6 in correspondence with the through hole 7 by welding or the like. has been done. Both sides 6a and 6b are provided extending from both ends of the base 6 substantially perpendicularly to the base 6, and the lengths of these side parts 6a and 6b in the vertical direction are longer than the length of the base 6 in the vertical direction. In addition to providing enlarged protrusions 6a ₁ , 6a ₂ , 6b ₁ , and 6b ₂ , oblique side portions 9a and 9b extending diagonally at both ends of the base 6 in the vertical direction and base 6 and the tips of these oblique side portions 9a and 9b are provided. A leg portion 9 is formed of fixed portions 9a ₁ and 9b ₁ extending in parallel.

The nut plate 5 has both sides 6a, 6
The protruding portions 6a ₁ , 6a ₂ , 6b ₁ , 6b ₂ of the stiffener 4 are fixed to the inner surfaces of the both sides 4 a , 4 b by spot welding or the like, and the fixing portions 9 _{a 1} , 9 of the leg portion 9 are
_b1 is fixed to the inner surface of the ceiling portion 4c of the stiffener 4 by spot welding or the like, forming a box-shaped cross section as shown in FIG. In the figure, reference numeral 10 indicates a through hole drilled in the inner panel, and the through hole 7 of the nut plate 5 is
It is compatible with Natsuto 8.

In the above configuration, a seat belt (not shown)
The load that acts on the stiffener 4 and nut plate 5 that form a box-shaped cross section, and the inner panel 1 and outer panel 2 that form a closed cross section, is applied to the protrusions 6 on both sides 6a and 6b of the nut plate 5.
a ₁ , 6a ₂ , 6b ₁ , 6b ₂ and the fixing parts 9a ₁ , 9 of the leg part 9
b ₁ and the stiffener 4 to the outer panel 2 having high rigidity.

Therefore, inner panel 1 and outer panel 2
In addition, the nut plate 5 can prevent peeling from the welding point with the protruding parts 6a ₁ , 6
The legs 9a ₁ and 9b ₁ are welded together with _{a 2} , 6b 1 and 6b ₂ to the stiffener 4 to form a box-shaped cross section _, so it is extremely strong. That is, the column member 3 has a double closed cross section by welding the stiffener 4 to the outer panel 2 within the closed cross section,
This increases the rigidity of the column member.

Further, since the nut plate 5 is welded to the stiffener 4, and this stiffener 4 is welded to the outer panel 2 as described above, the nut plate 5
The load applied to the outer panel 2 is distributed to the outer panel 2 via the stiffener 4, and as a result, the welded portion between the outer panel 2 and the inner panel 1 is prevented from peeling off.

Furthermore, the box-shaped cross section formed by the nut plate 5 and the stiffener 4 is formed by welding not only the side parts 6a and 6b of the nut plate 5 but also the leg 9 to the stiffener 4, so that The section modulus is extremely high, and the rigidity of the column member 3 against the component forces in all directions of the load applied to the nut plate 5 can be significantly improved.

In addition, since the legs 9 of the nut plate 5 are welded to the ceiling of the stiffener 4, no welding marks are left on the outer surface of the outer panel 2.

In the above embodiment, a center pillar is shown as the column member 3 having a closed cross section, but the present invention can also be applied to an upper side rail or a floor anchor attachment part.

As explained above, according to this invention, both sides of the nut plate are welded to both sides of the stiffener provided between the inner panel and the outer panel, and the legs formed in the longitudinal direction of the nut plate are attached to the ceiling of the stiffener. Since the nut plate and the stiffener are welded to each other to form a box-shaped cross section, it is possible to provide an extremely strong structure for attaching the seat belt anchor of an automobile.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a structure for attaching a seat belt anchor for an automobile according to this invention, FIG. 2 is a cross-sectional view taken along the line A--A in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line B--B in FIG. 1... Inner panel, 2... Outer panel, 3
...Column member, 4...Stiffener, 4a, 4b...
Both sides, 4c...Ceiling, 5...Nut plate,
6a, 6b...both sides, 9...legs.

Claims (1)

[Scope of utility model registration request] A stiffener is provided in the internal space of a column member with a closed cross section formed by joining an inner panel and an outer panel, and has a substantially U-shaped cross section that opens toward the inner panel and is elongated in the longitudinal direction of the column member. Both sides of are welded to the above outer panel,
Between the stiffener and the inner panel, there is a base to which a nut is attached, both sides extending from both ends of the base toward the outer panel and extending vertically, and both sides extending from both longitudinal ends of the base toward the outer panel. and a pair of legs provided between the nut plates, both sides of the nut plate are welded to both sides of the stiffener, and the pair of legs are welded to the ceiling of the stiffener, A seat belt anchor attachment structure for an automobile, characterized in that a box-shaped cross section is formed inside the pillar member by a nut plate and a stiffener.