JPH0930370A - Reinforcing structure for seat belt anchor retainer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reinforce the seat belt anchor retainer fixing a seat belt anchor. SOLUTION: In a vehicle where a closed cross sectional structure 2 is formed at the lower surface side of a floor panel 70 in the occupant room of a vehicle, and swivel anchor brackets 50 and 51 holding both ends of a swivel anchor 4 provided for one end of a torsion bar for a suspension, are fixed, a seat belt anchor retainer 1 to be fixed to the lower surface of the floor panel 70 is formed integrally with one 51 out of the swivel anchor brackets 50 and 51. Downward load acting on the swivel anchor bracket 51 is so designed as to be balanced with upward load acting on the seat belt anchor retainer 1 by a seat belt 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seatbelt anchor retainer for a seatbelt of a vehicle front seat, and more particularly to a reinforcing structure for a vehicle seatbelt anchorage adopting a torsion bar for a front suspension.

[0002]

2. Description of the Related Art A large load is applied to a seat belt anchor for fixing the base end of a seat belt of a vehicle by pulling the seat belt in an emergency. So in general,
The seatbelt anchors are fixed to the high-strength closed section structure of the floor panel. For example, in a vehicle having a torsion bar type front suspension, there is one in which the front suspension is fixed to a closed cross-section structure portion that locks a swivel anchor at the tip of the torsion bar.

As shown in FIG. 2, in the vicinity of the rear end of the torsion bar 3 which is connected to the swing arm F1 of the front suspension F and extends toward the rear of the vehicle, a closed cross-section structure portion having a closed cross-section structure is formed on the lower surface of the floor panel 70. 2 is formed. FIG. 4 shows the closed cross-section structure portion 2. The closed cross-section structure portion 2 includes the stepped portion 72 at the rear end of the front floor panel 70.
The header panel 21 facing the stepped portion 72 is fixed to a joint portion between the edge of the rear floor panel 71 and the front edge of the rear floor panel 71, and has a closed cross-sectional structure extending in the vehicle width direction.

A swivel anchor bracket (hereinafter referred to as a bracket) 5 for fixing a swivel anchor 4 (FIG. 3) provided at the rear end of the torsion bar 3 is fixed to the closed cross-section structure portion 2. The bracket 5 is composed of first and second brackets 50 and 51 that are thick plate members that are fixed to opposite side surfaces of the closed cross-section structure portion 2 so as to face each other. Opposing semi-arcuate locking holes 52, 53 are formed. Then, the torsion bar 3 has a swivel anchor 4 at the rear end thereof.
As shown in FIG. 4 (C),
By fixing both ends to the locking holes 52 and 53 of No. 1, it is fixed to the closed section structure part 2.

On the other hand, in the closed cross-section structure portion 2, the second
A seat belt anchor retainer (hereinafter referred to as a retainer) 1A of a thick plate is fixed along the inner surface of the front floor panel 70 so as to be adjacent to the bracket 51.
A mounting hole 73 that penetrates the front floor panel 70 and the retainer 1A is formed in the step 72 of the front floor panel 70. A weld nut 9 is provided in the mounting hole 73, and a seat belt anchor (hereinafter referred to as a belt anchor) 61 is tightened and fixed in the mounting hole 73 by a screw member 8 (FIG. 4 (B)).

[0006]

The belt anchor 61 of the seat belt is pulled upward by a large load of an occupant in an emergency. On the other hand, the swivel anchor 4 of the torsion bar 3 has an arrow T of the torsion bar 3 according to the weight of the vehicle body and the behavior of the swing arm F1 of the suspension.
Twisting in the directions (FIGS. 2 and 3) pulls downward. The closed cross-section structure portion 2 has high rigidity because the header panel 21 is thick against a load pulled downward, but the front floor panel 7 has a high rigidity against a load applied upward.
Since 0 is thin, it may be deformed. Further, in order to prevent this, measures such as increasing the plate thickness of the retainer 1A or enlarging its area to increase the welding surface can be taken.
Increases weight and cost.

Therefore, the present invention has been made to provide a seat belt anchorage retainer having a high strength capable of withstanding the input load of the belt anchor and the swivel anchor, and to solve the problem of eliminating the deformation of the vehicle body against the input load. is there.

[0008]

The present invention is shown in FIGS. 1 and 2.
As shown in FIG. 3, in the reinforcing structure of the seat belt anchorage 1 that is fixed to the lower surface of the passenger compartment floor panel 70 of the vehicle and fixes one end of the seat belt 6, the closed cross section of the closed cross section structure on the lower surface side of the front floor panel 70. Structure 2
And the swivel anchor 4 at the tip of the torsion bar 3 that forms the front suspension F in the closed cross-section structure portion 2.
The swivel anchor bracket 5 that locks the bracket is fixed, and the bracket 5 and the retainer 1 are integrally formed (claim 1).

The closed cross section structure 2 having the above closed cross section is formed by a step 72 at the rear end of the front floor panel 70 and the step 72.
Header panel 2 with a substantially L-shaped cross section secured to the lower surface of the
And 1. The bracket 5 constitutes the closed cross section structure section 2 and the first bracket 50 which is fixed to the side surface of the header panel 21 constituting the closed cross section structure section 2 to lock one end of the swivel anchor 4. The second bracket 51 is fixed to the side surface of the stepped portion 72 of the front floor panel 70 and locks the other end of the swivel anchor 4. Then, one end of the second bracket 51 is extended to form the retainer 1 by the extending portion (claim 2).

By integrally molding the retainer 1 and the bracket 5, the upward load applied to the belt anchor 61 and the downward load applied to the swivel anchor 4 cancel each other out, and the load on the vehicle body is reduced. be able to.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 2, a torsion bar 3 which is connected to a swing arm F1 of a front suspension F and works in conjunction with the swing arm F1 extends rearward of a vehicle, and its rear end is below a rear end of a front seat S. It has been placed in. A closed cross-section structure portion 2 having a closed cross-section structure is formed on the lower surface of the rear end of the front floor panel 70 on which the front seat S is placed. As shown in FIG. 1 (A), a rear end of the front floor panel 70 has a vertical step portion 72 having a substantially inverted L-shaped cross section, and a rear edge of the vertical floor portion 72 is overlapped with a front edge of the rear floor panel 71 by welding. is there. At the rear end of the front floor panel 70, a header panel 2 made of a thick plate having a substantially L-shaped cross section facing the lower surface is provided.
1 is stuck. The front end edge of the header panel 21 is welded to the lower surface of the upper step of the front floor panel 70, and the rear end edge is overlapped and welded to the joint portion of the front panel 70 and the rear floor panel 71. As described above, the closed cross-section structure portion 2 includes the front floor panel 70.
The rear end portion and the header panel 21 have a closed cross-section structure with high strength.

As shown in FIGS. 1A and 1B, a thick first bracket 50 is fixed to the outer surface of the vertical portion of the header panel 21 along the same. Then, a semicircular first locking hole 52 penetrating this and the header panel 21 is formed. On the other hand, front floor panel 7
A second bracket 51 is fixed to the step portion 72 of 0 along the inner side surface thereof at a position facing the first bracket 50. The second bracket 51 is made of a thick plate, and the central portion thereof projects to the inside of the closed cross-section structure portion 2, and the semicircular second bracket 51 that opposes the first locking hole 52 is provided on the projecting portion.
Locking holes 53 are formed.

On the other hand, the step portion 7 of the front floor panel 70
A mounting hole 73 is formed at a position above the second locking hole 53 on the inclined surface at the upper end of the second mounting hole 73. An extension portion is formed at one end of the second bracket 51 and extends to the position of the mounting hole 73 on the inclined surface, and the extension portion constitutes the retainer 1. The retainer 1 is welded to the inner surface of the inclined surface of the front floor panel 70. A hole common to the mounting hole 73 is made to penetrate through the retainer 1, and a weld nut 9 is provided at the opening edge of the inner surface thereof. The seatbelt anchor 61 provided at the base end of the inner buckle 60 at one end of the seatbelt 6 is tightened and fixed by the screw member 8 in the attachment hole 73 provided on the inclined surface of the front floor panel 70.

As shown in FIGS. 2 and 3, the swivel anchor 4 has a half-cylindrical swivel 40 and an anchor bolt 4 at the tip of the torsion bar 3 extending in the vehicle front-rear direction.
1 is passed through, and the base end of the anchor bolt 41 is locked via an anchor arm 42 protruding from the tip of the torsion bar 3. Then, as shown in FIG. 1 (B), the swivel anchor 4 has an anchor bolt 4
1 is passed through the hole 22 formed in the bottom surface of the header panel 2, and the swivel 40 is swung into the engaging holes 52 and 53 of the first and second brackets 50 and 51.
The both ends of 0 are fixed to the closed cross-section structure 2 by locking both ends. A service hole 74 is formed in the front floor panel 70 directly above the swivel anchor 4.

According to the present embodiment, the retainer 1 and the second bracket 51 are integrally formed, so that the swivel anchor 4 can be prevented from being pulled upward by a large occupant load applied to the belt anchor 61 in an emergency. The downward tensile load due to the torsion of the torsion bar 3 in the direction of the arrow T (FIGS. 2 and 3) accompanying the operation of the suspension is applied, and the two loads cancel each other. Therefore, the load burden on the front floor panel 70 is reduced, and deformation does not occur.

[0016]

According to the present invention, the seatbelt anchor retainer, on which the load is applied upward by the seatbelt, is formed integrally with the swivel anchor bracket on which the load is applied downward by the swivel anchor, and the load in the vertical direction is increased. By making the balance, it is possible to eliminate the deformation of the vehicle body by providing a structure having high strength capable of withstanding the input load of the seat belt anchor and the swivel anchor.

[Brief description of drawings]

FIG. 1 (A) is a perspective view of a main part of a reinforcing structure of a seat belt anchorage of the present invention, and FIG. 1 (B) is FIG. 1 (A).
FIG. 6 is a cross-sectional view taken along the line IB-IB in FIG.

FIG. 2 is a perspective view showing a suspension and a seat belt to which the present invention is applied.

FIG. 3 is a perspective view showing a swivel anchor used in the present invention.

FIG. 4A is a perspective view of a main part of a structure of a conventional seatbelt anchor retainer corresponding to FIG.
4B is a sectional view taken along a line IVB-IVB in FIG. 4A, and FIG. 4C is a sectional view taken along a line IVC-IVC in FIG. 4A.

[Explanation of symbols]

 1 seatbelt anchor retainer 2 closed section structure 21 header panel 3 torsion bar 4 swivel anchor 5 swivel anchor bracket 50 first swivel anchor bracket 51 second swivel anchor bracket 6 seatbelt 70 floor panel (front floor panel) 72 front Floor panel step F Front suspension

Claims (2)

[Claims] 1. A reinforcing structure of a seat belt anchorage retainer fixed to a lower surface of a passenger compartment floor panel of a vehicle and fixing one end of a seat belt, wherein a closed cross-section structure portion is formed on a lower surface side of a front floor panel, A swivel anchor bracket that locks a swivel anchor at the tip of a torsion bar that constitutes a front suspension is fixed to the cross-section structure portion, and the bracket and the seatbelt anchor retainer are formed integrally with each other. Reinforced structure. 2. The closed cross-section structure portion is composed of a step portion at the rear end of the front floor panel having an almost inverted L-shaped cross section, and a header panel having an approximately L-shaped cross section fixed to the lower surface side of the step portion. A first swivel anchor bracket for fixing a swivel anchor bracket to one side surface of the closed cross-section structure part and locking one end of the swivel anchor, and a swivel anchor fixed to the other side surface of the closed cross-section structure part. The seatbelt anchor retainer according to claim 1, wherein the seatbelt anchor retainer is formed by a second swivel anchor bracket that locks the other end of the anchor, one end of the second swivel anchor bracket is extended, and the extending portion forms the seatbelt anchor retainer. Reinforced structure for seat belt anchorage.