JPH07277110A - Bumper stay installation structure - Google Patents

Abstract

PURPOSE:To provide a bumper stay installation structure by which no special nut and no special tool are required and remarkable improvement in installation workability can be expected. CONSTITUTION:A bumper stay installation structure consists of a bumper reinforcement 1, in which at least two through holes 10, 11 for fastening apparatuses 6, 7 are arranged in the direction crossing with a shaft center, and a bumper stay 2, in which an end face 5 on one side is fixed and supported in a vehicle body. On the other end face 9 of the bumper stay 2, at least two fastening apparatuses 6, 7 passing through the through holes 10, 11 for the fastening apparatuses 6, 7 are welded and flanges 3, 4 are arranged, and the flanges 3, 4 are brought into tight contact with the bumper reinforcement l so as to be clamped when the two fastening apparatuses 6, 7 are passed through and engaged with the two fastening apparatus through-holes 10, 11 in the bumper reinforcement 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bumper stay mounting structure for connecting a vehicle bumper reinforcement to a vehicle body, and more particularly to a bumper stay mounting structure suitable for a lightweight vehicle in which the bumper reinforcement is made of aluminum.

[0002]

2. Description of the Related Art Conventionally, a bumper stay mounting structure of this type has a side surface of a bumper reinforcement 1 and end surfaces 29, 30 of a bumper stay 22 as shown in FIGS. 4 (A), 4 (B) and 4 (C). Abut the bolt 2 as shown in Fig. 4 (B).
4 and the nut 23 or the nut 25 of FIG. 4 (C). To assemble them, in the example of FIG. 4 (B), the nut 23 welded to the end surface of the bumper stay 22 and the working hole 26 provided on the surface of the bumper reinforcement 1 facing the side surface are used. It is fastened with bolts 24 from the bumper reinforcement 1 side using a special tool. In the example shown in FIG. 4C, the hollow beam members 14 and 15 of the bumper reinforcement 1 are used.
A special nut 25 is fixed to the inner wall, and the bumper stay 2
The mounting structure is such that the bolts 24 are fastened and fixed from the side of the second end surface 28.

[0003]

However, as shown in FIG.
In the conventional example shown in (B), since the bumper reinforcement 1 is made of aluminum, it is difficult to weld and fix a general-purpose steel nut, and the end faces 29, 3 of the steel bumper stay 22 are fixed.
It is necessary to weld the nut 23 to the 0 side, and therefore, the work hole 26 is provided in the bumper reinforcement 1 as shown in FIG. 4 (B), and the tool for holding the bolt is inserted from the work hole 26. I was screwing it in. Therefore, there is a problem that a special tool is required. In the case of a general tool, the bolt 24 is not reliably held, and there is a problem that it may drop into the space of the hollow beam members 14 and 15 of the bumper reinforcement 1 and workability is poor. Further, in the mounting structure shown in FIG. 4 (C), it is necessary to fix the nut 25 to the inner wall of the space of the hollow beam members 14 and 15 of the bumper reinforcement 1, and since it is made of aluminum, it is difficult to weld and fix the nut 25. Was needed. An example of the special nut is a pop nut, which is a trade name. This had the disadvantage of rising costs.

The present invention has been made in view of such a problem, and provides a bumper stay mounting structure which sufficiently achieves the conventional effects, does not require a special nut or a special tool, and is expected to have an extremely improved mounting workability. With the goal.

[0005]

The present invention achieves the above object, and a bumper reinforcement having at least two through holes for fasteners in a direction intersecting with a shaft core, and one end surface of the bumper reinforcement. A bumper stay fixedly supported on the vehicle body; at least two fasteners penetrating through the through holes of the two fasteners are welded to the other end surface of the bumper stay; A bumper stay mounting structure, wherein the flange is configured to be capable of being closely clamped to the bumper reinforcement when the two fasteners are inserted through the two fastener through holes of the bumper reinforcement. Is. Further, the bumper reinforcement is formed with a corner having curvature at both ends, and at this corner, at least two through holes of the fasteners are provided in a direction intersecting with the axial center of the bumper reinforcement. A trapezoidal shape, the other end surface of the trapezoidal shape being formed so as to be able to closely clamp the bumper reinforcement, and at least 2
It is characterized in that it is formed into a body having one surface, and the fastener is welded to either of the two surfaces of the other end surface. Further, a flange provided on the other end surface of the bumper stay is formed in a U-shaped cross-section so that the bumper reinforcement can be held.

[0006]

When the two fasteners welded to the other end surface of the bumper stay penetrate through the through holes of the bumper reinforcement, the flange of the bumper stay closely holds the bumper reinforcement. Thus tighten the fasteners to secure the bumper reinforcement to the bumper stay.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A bumper stay mounting structure of the present invention will be described below with reference to the drawings. First, FIG. 1 will be described. It comprises a bumper reinforcement 1 having at least two through holes for fasteners in a direction intersecting with the shaft center, and a bumper stay 2 whose one end surface 5 is fixedly supported on the vehicle body. The bumper reinforcement 1 is formed of at least two hollow beam members 14 and 15 divided by a partition wall 16, and the hollow beam members 14 and 15 are formed so as to share a common partition wall 16. The hollow beam members 14 and 15 are provided with through holes 10 and 11 penetrating both side walls 18 and 18 of the hollow beam members 14 and 15 so that the fasteners 6 and 7 can penetrate therethrough. The other end surface 9 of the bumper stay 2 is provided with flanges 3 and 4 having at least two bending members 17 and 27 each having an L-shaped end surface on both side surfaces, and is welded to the other end surface 9. At least two fasteners 6 and 7 to which one ends 12 and 13 of the members are fixed are fixed.

Next, a method of assembling this device will be described.
One end surface 5 of the bumper stay 2 is fastened to the vehicle body side member by a fastener using a flange of the bumper stay 2. The fasteners 6 and 7 such as bolts provided on the other end surface 9 of the bumper stay 2 are made to face the through holes 10 and 11 provided in the bumper reinforcement 1, and the penetration of the bumper reinforcement 1 is performed. Hole 1
The fasteners 6 and 7 fixed to the bumper stay 2 are inserted through the fasteners 0 and 11, and the fasteners 6 and 7 are used as guides to insert the bumper reinforcement 1 into the flanges 3 and 4. The parts are brought into contact with each other and sandwiched, and fastened and fixed by the fastener 8. Thereby, the L-shaped bending members 17 and 2
The corner portion of the bumper reinforcement 1 is sandwiched between the flanges 3 and 4 provided with 7. That is, the bumper reinforcement 1 is vertically positioned by the flanges 3 and 4 while being engaged along the fastening members 6 and 7, and is fastened and fixed by the fastening member 8 to finish the attachment.

Therefore, there is no difficult process in the mounting work process, unlike the conventional mounting, the fastening tool does not fall off due to a mounting mistake at the time of fastening, there is no need for a special tool, and a special tool is not used. There is no need to use various parts, and the mounting structure has good productivity. The bumper reinforcement 1 receives a load due to the tightening force when tightened using the fastener 8, and the flanges 3 and 4
Is a support structure that receives a reaction force as a free support end. Further, mechanically, the fastening device applies a concentrated load (pulling) to the center, and the flange takes the form of a free supporting end.

Since this device has such a structure, it is mechanically located near the center of the flanges 3 and 4 forming a beam with the positions of the fasteners 6 and 7 on the free support end face 9 of the bumper stay 2 as the fulcrum. Of course, the same stress as when a load is applied is generated, and since the stress can be dispersed compared to the fixed support end, weight can be reduced. In the present invention, the hollow beam members 14 and 15 have been described as having two pieces, but it is needless to say that the same mounting structure can be obtained when there are three or more. Further, in order to further improve workability, a collar (hollow tube) may be fixed in advance to the through holes 10 and 11.

Referring to FIG. The bumper reinforcement 1 is formed with a corner having curvatures at both ends, and at least two through holes 10 of the fastener 6 are provided in this corner in a direction intersecting with the axis of the corner. The bumper stay 2 has a trapezoidal planar cross-sectional shape, and the other end surface 21 of the trapezoid is formed.
Is formed so as to be able to be closely clamped to the bumper reinforcement 1 and has a body having at least two surfaces, and the fasteners 6, 6 are welded to either of the two surfaces of the other end surface 21. Configure. The mounting position of the bumper stay 2 on the vehicle body side is deviated to the center of the vehicle body, and the other end surface 21 of the bumper stay 2 has two surfaces 19 and 20.
The end of the fastener 6 is fixed to the surface 20 by welding and the other end is projected along the axis of the bumper stay 2. The fastener 6 is inserted into and engaged with a through hole 10 provided at a corner of the bumper reinforcement 1 and fastened and fixed by the fastener 8. In this embodiment, the case where there is one hollow beam member has been described, but the same applies to the case where there are two or more hollow beam members.

FIG. 3 shows a part of the structure of the bumper stay 2. This FIG. 3 illustrates the case where the bumper reinforcement 1 has one hollow beam member. There is only one fastener 6, but when there are two or more fasteners 6,
Are fixed to the other end surface by welding or the like. The flanges 3 and 4 are U-shaped in cross section by the bending members 17 and 27, and are formed so that the bumper reinforcement 1 can be held.

[0013]

According to the present invention, the end of the fastener is fixed to the center of the other end face of the bumper stay, the other end is projected along the axis of the bumper stay, and both ends are provided. The provided flange having a U-shaped cross section is formed so as to be able to hold the bumper reinforcement, and the bumper reinforcement is provided with a through hole through which the fastener is penetrated. The fastener is used as a guide to be inserted into the through hole provided in the bumper reinforcement so as to be brought into contact with the other end face, and the corner portion of the bumper reinforcement is brought into contact with the other end face. At this time, the flange provided on the bumper stay is formed so as to sandwich the bumper reinforcement. With this configuration, the corner portion of the bumper reinforcement is pressed against and supported by both ends of the other end surface of the bumper stay, that is, the flange, and the axial force due to the fastening of the fastening device acts as a concentrated load. . This is because stress is dispersed when both ends are supported by fixed ends and a concentrated load acts on the center of both ends in the case where both ends are supported by free ends and a concentrated load acts on the center, It is advantageous from the viewpoint of stress and has an excellent effect of enabling weight reduction. Further, when the fastener provided on the bumper stay is inserted into the through hole and guides and abuts the bumper reinforcement, the flange provided on the other end face is clamped,
Workability is extremely good because it is fastened and fixed by the fastener.
Further, since there is no fear that the fastening tool will come off, there is an excellent effect that productivity at the time of mounting is extremely good.

[Brief description of drawings]

FIG. 1A is a perspective view of a bumper stay mounting structure according to an embodiment of the present invention, and FIG.
(C) is a vertical sectional view of other portions.

FIG. 2 is a plan view of another embodiment of a bumper stay mounting structure according to another embodiment of the present invention.

FIG. 3 is a perspective view of a bumper stay according to still another embodiment of the present invention.

4A is a perspective view of a bumper stay mounting structure of a conventional example, FIG. 4B is a vertical sectional view of a main portion thereof, and FIG. 4C is a vertical sectional view of other portions. .

[Explanation of symbols] 1 bumper reinforcement 2 bumper stay 3 flange 4 flange 5 end face 6 fastening device 7 fastening device 8 fastening device 9 other end face 10 through hole 11 through hole 12 end part 13 end part 14 Hollow beam member 15 Hollow beam member 16 Wall 17 Bending member 21 Other end face 27 Bending member

Claims (3)

[Claims] 1. A bumper reinforcement having at least two through holes for fasteners in a direction intersecting with an axis, and a bumper stay whose one end surface is fixedly supported by a vehicle body. The other end surface of the bumper reinforcement is welded with at least two fasteners penetrating through the through holes of the two fasteners, and a flange is provided. A bumper stay mounting structure, wherein the flange is configured to be capable of closely sandwiching the bumper reinforcement when the individual fasteners are engaged through. 2. A bumper reinforcement is formed with corners having curvatures at both ends, and at least two through holes of fasteners are provided in the corners in a direction intersecting with the axis of the bumper reinforcement. The planar cross-sectional shape is a trapezoid, and the other end face of the trapezoid is formed so as to be able to be held in close contact with the bumper reinforcement, and at least two faces are formed into a body, and one of the two faces of the other end face. The bumper stay mounting structure according to claim 1, wherein the fasteners are welded to each other. 3. The bumper stay mounting structure according to claim 1, wherein a flange provided on the other end surface of the bumper stay is formed in a U-shaped cross section so that the bumper reinforcement can be held. .