JP2002274299A - Frame tip structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a frame tip structure capable of easily deforming to absorb a shock energy in the case of a slight collision at a speed of 15 km p.h. or less and easily replacing a deformed bumper member. SOLUTION: This frame tip structure has the bumper member capable of absorbing a shock in case of a collision. The bumper member is provided with a bumper beam 7, a bumper face is fitted to the bumper beam through a shock absorbing member 16 for absorbing shock energy, and the bumper beam 7 is removably fitted to a frame end part by an attaching and detaching means 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame end structure capable of improving pedestrian protection performance when a vehicle collides with a pedestrian, and particularly to a light collision at a speed of 15 km / h or less. The present invention relates to a frame distal end structure that can be easily deformed to absorb collision energy at the time and can easily replace the deformed bumper member.

[0002]

2. Description of the Related Art Conventionally, a shock absorbing member is provided between a vehicle body and a front bumper or a rear bumper of a vehicle to absorb a collision load by compressive deformation of the shock absorbing member during a frontal collision of the vehicle. (Japanese Unexamined Patent Publication No. 9-9518)
No. 9). Referring to FIG. 4, a conventional frame end structure described in the above publication is described. A pair of left and right front side members 101 provided at the front of the vehicle body and extending in the front-rear direction (FIG. Shown) is the general part 11
1 has a shape that gradually projects downward from the front end 112, and the front end 112 is open. An impact absorbing member 102 having a closed cross-sectional structure extending the general portion 111 of the front side member 101 projects forward from an opening at the front end 112 of the pair of left and right front side members 101. Reference numeral 122 denotes a crash bead.

The front end 121 of the pair of right and left shock absorbing members 102 is provided with a bumper reinforcement 3 extending in the vehicle width direction. The bumper reinforcement 103 has a cross section that opens a metal plate toward the rear of the vehicle. The shape is a hat shape. The bumper reinforcement 3 has a mountain-like curved shape in a plan view that protrudes a central portion in the longitudinal direction (vehicle width direction). Further, a plurality of beads 132 having a cross-section unevenness are formed on a front surface 131 of the bumper reinforcement 103. Are provided in the longitudinal direction. The above bumper reinforcement 103
Are the front ends 1 of the left and right shock absorbing members 102 inside the opening.
21 are arranged so as to hold each of them, and are erected in the vehicle width direction.
1 and the front end face of the shock absorbing member 102 are fastened and connected. Further, a front bumper 104 made of a synthetic resin is fastened and fixed to the outside of the bumper reinforcement 103 so as to cover the bumper reinforcement 103. With the frame end structure having the above-described configuration, the stroke of the compressive deformation of the shock absorbing member 102 due to the collision load becomes longer at the time of a frontal collision of the vehicle, and the amount of the collision energy absorbed by the shock absorbing member 102 can be increased.

[0004]

However, in the above-described frame end structure, since the shock absorbing member 102 and the front side member 101 are firmly fixed by welding or the like, a low speed of about 15 km / h is required. If the impact absorbing member 102 is deformed and the impact absorbing member 102 is deformed, the impact absorbing member 10
There is no other way but to cut and remove the front side member 2 from the front side member 101, and there is a problem that a large amount of work time and cost are required for repair.

[0005] Therefore, the present invention provides a bumper member comprising a shock absorbing member and a bumper face to a vehicle body frame by bolts.
An object of the present invention is to provide a frame end structure which can be easily attached and detached by attaching and detaching means such as a nut, and to solve the above-mentioned problems. According to the present invention, at the time of a light collision, even if the bumper member is deformed, the bumper member can be easily removed by the attaching / detaching means provided between the frame and the bumper member, and the bumper member can be easily replaced with a used or new bumper member. The time and cost required for repair work can be greatly reduced.

[0006]

SUMMARY OF THE INVENTION Accordingly, the object of the present invention is to provide a frame end structure having a bumper member capable of absorbing an impact at the time of a collision,
The bumper member includes a bumper beam, a bumper face is attached to the bumper beam via a shock absorbing member that absorbs collision energy, and the bumper beam is detachably attached to a frame end by attaching / detaching means. This is a feature of the frame tip portion. Further, the shock absorbing member has a structure that is easily deformed at the time of collision, and is a frame end structure.
The impact absorbing member is formed by sheet metal processing, and has a frame end structure. The beam attachment / detachment means may be a bolt / nut. Further, a shock absorbing member for protecting a pedestrian is attached to an outer surface of the beam. According to the present invention having the above-described solution, the energy at the time of a light collision at a speed of 15 km / h or less is absorbed only by the shock absorbing member, and safety can be ensured.
The deformed shock absorbing member can be easily removed from the frame for each bumper member by the attaching / detaching means and can be replaced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram of an assembly of a front frame and a bumper member, and FIG. 2 is an explanatory diagram of an assembly of a bumper beam and a shock absorbing member. FIG. 3 and FIG. 3 are side views showing a state in which a bumper beam having a shock absorbing member is attached to a front frame. In this embodiment, the structure of the front end of the front frame will be described as an example. However, it is obvious that the present invention can be applied to a rear frame, a side frame, and the like.

In FIG. 1, reference numeral 1R denotes a right front side frame, and 1L denotes a left front side frame, both of which have a closed cross-section. These frames have appropriate brackets 2 for fixing a vehicle body, a suspension and the like. 3 are attached by welding or the like. Further, a bumper beam mounting bracket 4 is mounted on the front end of each frame by welding or the like, and the beam mounting bracket 4 has a vertically extended shape as shown in FIG. Are formed with bolt insertion holes 5 and 6. The shape of the beam mounting bracket 4 and the bolt insertion holes 5 and 6 formed therein are not limited to this example, and other shapes and positions can be appropriately set.

The bumper beam 7 is formed as a box-shaped closed section and has a predetermined length in the vehicle left-right direction. The bumper beam 7 is formed by welding a member formed by, for example, a sheet metal press or the like by welding or the like. I have. Fixing brackets 8 and 9 are welded to the bumper beam 7 at positions corresponding to the above-described beam mounting brackets 4. Holes 10 and 11 formed in the fixing brackets 8 and 9 and holes formed by the beam mounting bracket 4 are provided. The structure is such that both can be detachably fixed by bolts and nuts 12 in a state where 5 and 6 are combined.

Further, shock absorbers 13, 14, 15 for protecting pedestrians having a bumper beam surface shape are attached to the front surface of the bumper beam 7 as shown in the figure. The shock absorbing member 16 is attached by appropriate fixing means such as welding. The pedestrian protection shock absorbing members 13, 14, 15 are made of an energy absorbing material made of synthetic resin or the like.

The shock absorbing member 16 has left and right members 16a and 16 formed with a bead 17 as shown in FIG. 2 (only one side is shown) so as to be easily deformed when subjected to a shock.
b is welded to form a box-shaped closed cross section, forming a so-called bellows-shaped shock absorbing member. With such a shape, the shock absorbing member can be easily formed by a press or the like. A bumper face (not shown) is attached to an end of the shock absorbing member 16 on the side opposite to the beam attachment side by appropriate means. The bumper beam 7 and the shock absorbing member 16 are integrally assembled by welding or the like, and a bumper face (not shown) is attached to the shock absorbing member 16 by a suitable fixing means.

The bumper member constructed as described above is shown in FIG.
As shown in the figure, the fixing bracket 8 of the bumper beam 7 and the beam mounting bracket 4 of the side frame 1 can be attached to and detached from the frame 1 by bolts and nuts 12. In the present invention, the bumper face, the shock absorbing member, and the bumper member integrated with the bumper beam are configured so that they can be easily attached to and detached from the frame by bolts and nuts.
Even if the shock absorbing member is deformed, it can be easily replaced with a used or new bumper member, thereby improving repairability.

Although the above embodiment has been described with reference to the front bumper structure, it is needless to say that the embodiment can also be applied to a rear bumper structure. Also, as the attaching / detaching means for joining the bumper beam and the side flaw, another attaching / detaching means having the same function can be used. Furthermore, the present invention may be embodied in various other forms without departing from its spirit or essential characteristics. Therefore, the above-described embodiments are merely examples, and should not be construed as limiting. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

[0014]

As described in detail above, according to the present invention,
Energy during a light collision at a speed of 15 km / h or less can be absorbed by the shock absorbing member to ensure safety, and the deformed shock absorbing member can be easily removed and replaced from the side frame for each bumper beam by attaching and detaching means. Therefore, unique effects such as extremely excellent repairability can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory view for assembling a front frame and a bumper member according to the present embodiment.

FIG. 2 is an explanatory view for assembling the front frame and a shock absorbing member.

FIG. 3 is a side view showing a state where a shock absorbing member is attached to the front frame.

FIG. 4 is an explanatory view for assembling a conventional front frame and a bumper member.

[Explanation of symbols]

 1L, 1R Left and right front side frames 2, 3 Brackets 4 Bumper beam mounting brackets 5, 6 Bolt insertion holes 7 Bumper beams 8, 9 Fixing brackets 10, 11 Bolt insertion holes 12 Bolts and nuts 13-15 Impact for pedestrian protection Absorbing member 16 Shock absorbing member 17 Bead

Claims (5)

[Claims] 1. A frame end structure having a bumper member capable of absorbing a shock at the time of a collision, wherein the bumper member includes a bumper beam, and the bumper beam is provided via a shock absorbing member that absorbs collision energy. A frame end structure, wherein a face is attached, and the bumper beam is detachably attached to an end of the frame by attaching / detaching means. 2. The frame end structure according to claim 1, wherein said shock absorbing member has a structure which is easily deformed at the time of collision. 3. The frame tip structure according to claim 2, wherein said shock absorbing member is formed by sheet metal processing. 4. The frame tip structure according to claim 1, wherein said beam attaching / detaching means is a bolt / nut. 5. The pedestrian protection shock absorbing member is attached to an outer surface of the beam.
The frame tip structure according to claim 4.