JP2002127868A - Mounting structure of anchor bracket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting structure of an anchor bracket simple in structure capable of easily providing positional precision and sufficiently enduring a load. SOLUTION: The mounting structure of the anchor bracket 10 of a seat S and a seat belt Sv mounted on a floor surface F of a vehicle connects one lengthy piece 11 of the L shaped cross-section anchor bracket 10 on a skeleton member 20 of a hat cross-section having an opening part above by overlapping it on one flange 21 of the skeleton member 20 and connecting the other short piece 15 of the L shaped cross-section on a vertical wall 24 continued from the other flange 22 of the skeleton member 20 by making it contact with it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of an anchor bracket for a seat or a seat belt, and more particularly, to a structure which is advantageous in terms of strength in a direction of a load applied to the anchor bracket and enables reliable positioning. The present invention relates to an anchor bracket mounting structure.

[0002]

2. Description of the Related Art A conventional anchor bracket mounting structure is as follows.
As shown in FIG. 6, a bracket 510 having a U-shaped cross section is provided on a bone member 520 having a hat cross-section, and a bone is formed so as to form a box cross-section with the bone member 520 as shown in FIG. Bracket 5 for member 520
10 is inserted, and the bone members 520 are inserted into the two U-shaped bent portions 515.
Are welded to the vertical walls 523 and 524. Specifically, the front and rear ends of the flat portion 511 of the bracket 510 are bent in the same direction (downward), and a bent portion 515 wider than the width of the flat portion 511 is formed, and the bent portion 515 is opened upward. The bracket 510 was attached to the bone member 520 by spot welding with contacting the front and rear vertical walls 523 and 524 of the bone member 520 having a hat cross section.

In the case where the bracket 510 is simply formed into a U-shape, when the bracket 510 is inserted into the bone member 620, as shown in FIG. Because of the extent to which it does, the in and out dimensions are easily out of order. As a countermeasure, as shown in FIG. 8, a folded piece 616 is provided from both of the U-shaped bent portions 615, and the folded piece 616 is overlapped with the flanges 521 and 522 of the hat section of the bone member 520, so that the bracket is formed. The insertion position of the 610 is regulated to ensure the accuracy of the in-and-out dimension.

[0004]

The bracket (reinforcement) 610 disclosed in Japanese Patent Application Laid-Open No. H11-115802 has a bottom 525 having a hat cross section.
In order to insert the bracket 610 into the bone member 520 having a wider opening, the bracket 610 is required to be formed at a negative angle, which involves many forming steps, and furthermore, the forming of the turned-back piece 616 is added, making the forming difficult. . Specifically, as shown in the developed view of FIG. 9, it is necessary to form the fold line a into a mountain fold, form a negative angle, and form the fold line B into a valley fold in the opposite direction to the fold line a. However, the molding process must be increased. Further, as is clear from FIG. 9, the punching shape also requires two L-shaped notches, which complicates the structure of the press punching die, and cannot be said to have good moldability in this aspect as well.

Therefore, as shown in FIG. 10, a bracket 710 in which the central portion of the bracket 710 has a U-shaped cross section of a negative angle and the flat portions 716 and 716 are formed on both sides thereof can be considered. In addition, there is a problem that a welding portion between the flange 715 having a U-shaped cross section and the vertical walls 523 and 524 of the bone member 520 is hidden by the flat portion 716, so that a spot welding gun is difficult to enter and welding is difficult. Therefore, the flat portion 71 of the bracket 710 is used as easy welding.
6 and the flanges 521 and 522 of the bone member 520 can be spot-welded, but the load applied to the bracket 710 is insufficient in strength because the load is applied in a direction in which the welding is peeled off, particularly at the rear welding location.

As described above, the conventional anchor bracket 51
With the mounting structure of No. 0, it was not easy to secure positioning accuracy while ensuring sufficient strength. In order to ensure this accuracy, it is necessary to provide the anchor brackets 610, 710 with flanges 616, 716 mounted on the flanges 521, 522 of the bone member 520. However, an anchor bracket 610 having flanges 616, 716,
In 710, the structure was complicated, the moldability was poor, and the cost was likely to be high.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an anchor bracket mounting structure which has a simple structure, can easily obtain positioning accuracy, and can sufficiently withstand an additional load in order to solve such a problem.

[0008]

SUMMARY OF THE INVENTION An anchor bracket mounting structure according to the present invention is an anchor bracket mounting structure for a seat or a seatbelt mounted on a vehicle floor surface, the upper structure constituting a vehicle floor surface. A bone member with a hat cross-section having an opening in the anchor bracket with an L-shaped cross-section
One long piece is overlapped and joined to one flange of a bone member, and the other short piece having an L-shaped cross section is joined by contacting a vertical wall continuous from the other flange of the bone member. And Therefore, the long piece of the L-shaped section is overlapped and joined to the flange of the bone member in front of the vehicle, and the other short piece of the L-shaped section is joined by contacting the rear vertical wall of the bone member. When a load is applied obliquely upward and forward to the anchor bracket, the long side is in the flange compression direction, and the short side is a force in the shearing direction between the short side and the vertical wall. The mounting structure can withstand the above. In addition, since the anchor bracket is formed with a simple L-shaped cross section, it can be formed regardless of a negative angle, and can be formed with a small number of steps.

Further, in the anchor bracket mounting structure according to the present invention, a notch is provided at a tip of a short piece of the anchor bracket to abut a positioning pin projecting from a reference hole formed in a vertical wall of a bone member. It is characterized by. Therefore, positioning of the short side of the anchor bracket in the height direction is determined only by the tip of the short side flange abutting on the positioning pin from above, and in the left and right direction, the notch at the end of the short side flange straddles the positioning pin. And the anchor bracket can be positioned simply by setting it from above.

In the anchor bracket mounting structure according to the present invention, a reference hole for fitting to a reference pin in a direction perpendicular to the flange is provided at a position where the long piece of the anchor bracket overlaps the flange of the bone member. It is characterized by having been provided. Therefore, the positioning of the anchor bracket in the long side in the height direction is determined only by mounting the front end of the long side on the flange on the front side of the bone member. It is determined by being inserted into the reference hole provided at the distal end on the long side, and positioning can be performed by simply setting the anchor bracket from above.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of an anchor bracket mounting structure according to the present invention will be described below with reference to the drawings. The anchor bracket mounting structure of the present embodiment is provided, for example, on a cross member of a floor. Here, FIG. 1 is a perspective view showing a bone member to which an anchor bracket is attached, and FIG. 2 is a sectional view of the bone member to which an anchor bracket is attached.

(Configuration) The configuration of an embodiment of the anchor bracket mounting structure according to the present invention will be described. FIG.
As shown in FIG. 1, a floor surface F of a vehicle includes a floor panel 1 made of a steel plate and a cross member (bone member) formed on a lower surface of the floor panel 1.
20 is formed by welding. An anchor bracket 10 is attached to a required position between the floor panel 1 and the bone member 20, that is, a position for fixing a seat belt anchor or a seat leg to which a large load is applied in an emergency, as shown in FIG. I have.

As shown in FIG. 1, the anchor bracket 10 is a steel plate having an L-shaped cross-section integrally formed with a long piece 11 and a short piece 15, and the width of the short piece 15 is the width of the long piece 11. It is larger and has overhangs 16 on both sides. At the approximate center of the long piece 11, a fastening hole 12 for fastening the seat belt anchor 50 or the seat leg 60 is provided, and an anchor nut 121 is welded to the back surface thereof. A reference hole 13 for positioning when attaching the anchor bracket 10 to the bone member 20 is formed at the tip of the long piece 11.

At the approximate center of the plate end of the short piece 15, a notch 17 for positioning when the anchor bracket 10 is attached to the bone member 20 is provided. The shape of the notch 17 may be a semicircle or a V-shaped notch.

Next, the bone member 20 to which the anchor bracket 10 is attached has flanges 21 and 22 on both sides which are spot-welded to the floor panel 1 of the vehicle floor F, and the opening between the flanges 21 and 22 is provided. It consists of a steel plate having a hat cross section composed of vertical walls 23, 24 extending downward continuously from the portion and a bottom 25 connecting the vertical walls 23, 24, and extends in the left-right direction of the vehicle. It is attached. The width of the opening between the flanges 21 and 22 is formed to be slightly wider than the width of the bottom 25.

That is, the tip of the long piece 11 of the anchor bracket 10 is overlapped and spot-welded to the flange 21 on the front side of the vehicle, and the short piece 15 of the anchor bracket 10 abuts on the vertical wall 24 on the rear side of the vehicle. The projecting portions 16 are spot-welded to the vertical wall 24.

In order to position and attach the anchor bracket 10 to the bone member 20, as shown in a sectional view of FIG. 2, a reference hole 211 formed in a front flange 21 of the bone member 20 is not shown. By inserting a reference pin 32 erected on the jig and a reference hole 13 provided at the tip of the long piece 11 of the anchor bracket 10 through the reference pin 32,
Determine the left and right positions of the anchor bracket 10 and
The side is brought into contact with the vertical wall 24 on the rear side of the bone member 20.

A reference hole 241 provided in the rear vertical wall 24 has:
Since the positioning pin 33 provided in a jig (not shown) so as to be freely inserted and protruded toward the inside of the cross section of the hat, the notch 17 provided in the short piece 15 of the anchor bracket 10 fits into the positioning pin 33. The position of the anchor bracket 10 in the height direction and the left-right direction on the short piece 15 side is determined. Thereafter, the long piece 11 of the anchor bracket 10 is pressed and fixed from above by the holding jig 31, spot welding is performed between the long piece 11 and the flange 21 on the front side of the bone member 20, and the overhang 16 of the short piece 15 is formed. The anchor bracket 10 is fixed to the bone member 20 by performing spot welding between the anchor member 10 and the rear vertical wall 24.

(Operation) Next, the operation of the embodiment of the anchor bracket mounting structure of the present invention configured as described above will be described with reference to FIGS. FIG.
FIG. 4 is a side cross-sectional view showing a state where the seat S and the seat belt Sv of the vehicle are mounted on a floor surface F, and a seat belt anchor 50 holding a buckle 52 for inserting a tongue plate 51 provided in the middle of the seat belt Sv; The seat legs 60 provided below the seat cushion Sc and holding the seat S to the vehicle are attached to the floor surface F with anchor bolts 70 via the anchor brackets 10, respectively.

In an emergency, when a sudden braking force acts on the front of the vehicle, an impact force applied to the seat belt Sv by an occupant is applied, and a force P obliquely upward and forward acts on the seat belt anchor 50. Further, due to the weight of the seat S, a turning force Q for rotating the seat leg 60 upward and forward acts on the seat leg 60.

That is, as shown in FIG. 4, the force P acting on the seat belt anchor 50 causes a force to rotate the anchor bracket 10 in the direction of arrow A, so that the length of the anchor bracket 10 is long. Piece 11 and bone member 20
A compressive force C acts on a joint between the front piece 21 and the front flange 21, and a shearing force D acts on a joint between the short piece 15 and the rear vertical wall 24.

As shown in FIG. 5, the long piece 11 of the anchor bracket 10 and the front flange 21 of the bone member 20 are caused by the force Q acting on the seat leg 60 as shown in FIG. Compression force C '
Acts, and a shearing force D ′ acts on the joint between the short piece 15 and the rear vertical wall 24.

The joints of the steel sheets have much higher resistance to the shearing forces D and D 'than the peeling force, and therefore exhibit sufficient strength against an emergency load.

As described above, the mounting structure of the anchor bracket according to the present embodiment is a mounting structure of the anchor bracket 10 of the seat S or the seat belt Sv mounted on the floor F of the vehicle. A long piece 11 of an anchor bracket 10 having an L-shaped cross section is attached to a bone member 2 having a hat cross section having an upper opening.
0 and the other short piece 15 having the L-shaped cross-section is connected to the other flange 2 of the bone member 20.
Since the mounting structure is abutted and joined to the vertical wall 24 that is continuous from 2, the anchoring bracket 10 can be sufficiently assembled while only being inserted and abutted against a reference pin or positioning pin protruding from the bone member 20 while being improved. High strength can be secured.

It should be noted that the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention. For example, in the above embodiment,
Although the example in which the anchor bracket mounting structure is applied to the floor of a vehicle has been described, the present invention is not limited to this, and it is also possible to apply the anchor bracket mounting structure of the shoulder belt of the seat belt of the pillar of the vehicle.

[0026]

The present invention relates to a mounting structure of an anchor bracket for a seat or a seat belt to be mounted on a floor of a vehicle, and to a bone member having a hat cross-section and having an upper opening, which constitutes the floor of the vehicle. , One long piece of the anchor bracket having the L-shaped cross section is overlapped and joined to one flange of the bone member, and the other short piece of the L-shaped cross section is connected to the longitudinal section which is continuous from the other flange of the bone member. Since it is configured to be in contact with the wall and joined, it can be positioned simply by setting the anchor bracket from above the bone member with a simple structure, and the front side is compressed, Since the rear side resists by shearing, sufficient strength can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a mounting structure of an anchor bracket according to one embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an anchor bracket mounting structure according to an embodiment of the present invention.

FIG. 3 shows a floor F of a vehicle seat S and a seat belt Sv.
FIG. 4 is a side cross-sectional view showing a state of attachment to the camera.

FIG. 4 is a side sectional view showing a state where the seat belt anchor of FIG. 3 is attached.

FIG. 5 is a side sectional view showing a state where the seat leg of FIG. 3 is attached.

FIG. 6 is a perspective view showing a conventional anchor bracket mounting structure.

FIG. 7 is an explanatory view showing a method of attaching the anchor bracket of FIG. 6;

FIG. 8 is a perspective view showing another conventional anchor bracket mounting structure.

FIG. 9 is a plan view showing an expanded state of the anchor bracket used for the anchor bracket mounting structure shown in FIG. 8;

FIG. 10 is a perspective view showing another conventional anchor bracket mounting structure.

[Explanation of symbols]

 Reference Signs List 10 anchor bracket 11 long piece 15 short piece 20 bone member 21, 22 flange 23, 24 vertical wall 25 bottom 50 seat belt anchor 60 seat leg

Claims (3)

[Claims] 1. An attachment structure for an anchor bracket for a seat or a seatbelt attached to a floor of a vehicle, wherein the bone member has a hat cross-section and has an opening at an upper side, the member being an L-shape. One long piece of the anchor bracket of the cross section is overlapped and joined to one flange of the bone member, and the other short piece of the L-shaped cross section is brought into contact with a vertical wall continuous from the other flange of the bone member. An anchor bracket mounting structure characterized by being joined together. 2. A mounting structure for an anchor bracket according to claim 1, wherein a notch at the tip of a short piece of said anchor bracket abuts a positioning pin projecting from a reference hole formed in a vertical wall of said bone member. The mounting structure of the anchor bracket, characterized in that the anchor bracket is provided. 3. The anchor bracket mounting structure according to claim 1, wherein a long piece of the anchor bracket is positioned at a position where the long piece of the anchor bracket overlaps the flange of the bone member, in a direction perpendicular to the flange. A mounting structure for an anchor bracket, characterized in that a reference hole for fitting to a pin is provided.