JPS6238428Y2 - - Google Patents

Description

[Detailed Description of the Invention] The disclosed technology belongs to the technical field of a structure for attaching a resin bumper reinforcement to a chassis arm of a vehicle such as an automobile.

This idea is based on a bumper reinforcement made of resin such as FRP that is fitted with an elastic bumper made of urethane foam, etc., and a bumper reinforcement made of resin such as FRP, through contact between opposing surfaces of both and hook engagement. This is a device that relates to a combination structure of a bumper reinforcement and an arm that are mechanically connected.In particular, ribs are formed on the upper and lower ends of the bumper reinforcement, and mounting holes for preventing lateral slippage are provided on the opposing surface. ,
On the other hand, hooks for engaging the rib and hooks via screws for fastening and fixing are provided on the top and bottom of the tip of the arm,
Further, this invention relates to a combination structure of a bumper reinforcement and a seat of a vehicle, in which a protrusion that fits into the assembly hole is provided from the arm to prevent lateral displacement and to be fixed.

As is well known, bumpers are one of the safety equipment of vehicles such as automobiles, and recently elastic bumpers with a urethane foam core covered with a urethane elastomer skin have been used as shock absorbing bumpers. For the reinforcement that attaches the elastic bumper to the chassis extension arm, metal reinforcements with a closed cross-section shape have been used, but resin bumpers such as FRP have been adopted from the viewpoint of reducing weight and improving fuel efficiency. It is becoming more and more like this.

As mentioned above, in the case of a metal reinforcement, since both arms are metal, they are integrated by welding, but since the resin reinforcement and the metal arm are made of different materials, the following problems arise.

That is, as shown in FIG. 1, an elastic bumper 3 consisting of a urethane foam core material 1 and a urethane elastomer skin 2 is fixed to an FRP bumper reinforcement 4 via a flange 5 with bolts 6. The bumper reinforcement 4 must be assembled to a pair of left and right arms 7 extending to a chassis (not shown), but since the bumper reinforcement 4 is a pultruded product, the opposing surfaces 8 and 9 of both are attached with an adhesive. 10 to prevent horizontal displacement and peeling. Vertical displacement was prevented by sandwiching flanges 11 and 12 formed at the top and bottom of the tip of the arm 7.

However, this type of adhesive-based means has the disadvantage that it cannot be said to be sufficient in terms of reliability, and also requires a certain amount of time to fasten with a clamping jig until sufficient adhesive strength is obtained during assembly. However, there were drawbacks such as cumbersomeness and poor workability, and there were also problems that had to be managed to prevent sideways slipping during that time.

This idea was developed in view of the problems with arm assembly of resin bumper reinforcements based on the conventional technology mentioned above, and instead of using adhesive on the opposing surfaces, the ribs are clamped using taper hooks so that the clamping surfaces come into contact. To provide an excellent combination structure of a bumper reinforcement and an arm for a vehicle, which prevents vertical displacement, and can be assembled with a single touch by fitting holes and protrusions to center and prevent lateral displacement.

The structure of this invention in accordance with the above-mentioned purpose is to engage one rib on the opposing surface of the resin bumper reinforcement with the opposing hook of the arm, and to fit the protrusion of the latter into the assembly hole of the former for positioning and centering. By overhanging the corresponding hook over the other rib and tightening the bolts, both opposing surfaces are crimped together through the pressure of the hook and rib, and vertical displacement is prevented by the rib and hook. The gist of this is that the hole protrusion prevents lateral displacement and allows for one-touch assembly.

Next, an embodiment of this invention will be described below based on the drawings from FIG. 2 onwards. Note that the same parts as those in FIG. 1 will be described with the same reference numerals.

In the embodiment shown in FIGS. 2 and 3, the elastic bumper 3 is the same as a conventional product in which a urethane foam core material 1 is covered with a urethane elastomer skin 2. Bolts 6, 6 to the bumper reinforcement 4'
It is designed to be fixed with...

Therefore, the bumper reinforcement 4' is
For example, it is an FRP pultrusion product in which 50-80wt% of glass fibers are mainly made into unidirectional glass roving, and unsaturated polyester, vinyl ester resin, etc. are generally used as the matrix resin, and the cross section is Japanese-shaped. The left and right arms 7' are horizontally straight or curved.
Upper and lower assembly holes 13, 13 are bored in the opposing surface 8' of the part opposite to 7' so as to have vertical long axes,
Further, ribs 14, 14 are provided projecting from the upper and lower ends.

On the other hand, 7' is an arm, which extends from the chassis (not shown) in pairs on the left and right, and is generally a closed-section molded product formed by pressing an iron plate. protrusions 15 that have some degree of freedom and fit tightly on the left and right sides;
15 are integrally formed.

A hook 16 that engages with the rib 14 is integrally formed at the lower end of the arm 7'.
Further, a trapezoidal hook 19 is screwed onto the upper part through a bolt 6, and is press-fitted by forming a tapered surface 18 having a set angle with respect to the rib 14 and the stepped portion 17 of the arm 7'.

In the above structure, when assembling the FRP bumper reinforcement 4' to the arm 7', the hook 19 of the arm 7' is loosened, and the lower end rib of the opposing surface 8' of the bumper reinforcement 4' is loosened. 14 is first hooked onto 16 of arm 7', and the opposing surfaces 8' and 9'
While facing each other, insert protrusion 1 into assembly holes 13, 13.
Insert and fit 5 and 15, center and position,
When both opposing surfaces 8' and 9' are brought into contact and the bolt 6 is finally tightened, the tapered surfaces 18 and 18 of the hook 19 will be brought into contact with the stepped portion 17 of the arm 7' and the upper end rib 14 of the bumper reinforcement 4'. As a result, the bumper reinforcement 4' is crimped and fastened to the arm 7' with one touch.

Even if a load is applied to the bumper 3 and applied to the bumper reinforcement 4', it will be locked in the hooks 16, 19 of the ribs 14, 14 in the vertical direction, and in the assembly holes 13, 13 in the horizontal direction. protrusion 1 against
This is prevented by the fitting and locking of Nos. 5 and 15.

Next, in the embodiment shown in FIGS. 4 and 5, the protrusions 15'', 15'' of the arm 7'' are bent to protrude from the side of the opposing surface, so that the bumper reinforcement 4'' The assembly holes 13'', 13'' are also bored at corresponding positions, and there is no substantial difference in operation and effect from the above-mentioned embodiment.

Further, in the embodiment shown in FIGS. 6 and 7, a cylindrical projection 1 which is burred is provided on the opposing surface 9' of the arm 7.
5 and 15 are formed, and the bumper reinforcement 4 is provided with corresponding circular assembly holes 13 and 13, and its operation and effect are the same as those of the above two embodiments.

It goes without saying that the embodiments of this invention are not limited to the above-mentioned embodiments. For example, when assembling, adhesive may be applied to at least one of both opposing surfaces, or adhesive may be applied to both the upper and lower surfaces. Various aspects can be adopted, such as making the hooks both fastenable.

As mentioned above, according to this invention, in a combination structure in which a bumper reinforcement such as FRP is assembled to a metal arm, an assembly hole is drilled on the opposing surface of the bumper reinforcement, and By providing a fitting protrusion, it is possible to not only position the bumper during assembly, but also to prevent displacement during the assembly process. An excellent effect is achieved in that sideways displacement is prevented.

In addition, since hooks and screw fastening hooks are provided on the upper and lower molded ribs of the bumper reinforcement, it can be assembled with one touch, and
Fastening is performed reliably and vertical displacement is prevented, no crimping jig or curing time is required, and assembly work is shortened, increasing efficiency. This produces an excellent effect of improving product accuracy over time.

In addition, there is no need for adhesives, which makes the work easier and has the advantage of reducing work management.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of arm assembly of a bumper reinforcement based on the prior art, Fig. 2 and the following are explanatory diagrams of embodiments of this invention, and Fig. 2 is an explanatory longitudinal cross-sectional diagram of one embodiment; Figure 3 is an explanatory view of the second figure,
The figure is an explanatory view corresponding to FIG. 3 of another embodiment, FIG. It is. 3... Elastic bumper, 4', 4", 4... Bumper reinforcement, 7', 7", 7... Arm, 16, 19... Hook, 8'... Opposing surface, 1
4... Rib, 13, 13'', 13... Assembly hole,
9'... Opposing surface, 6... Screw, 15, 15'', 15
……protrusion.

Claims (1)

[Scope of utility model registration request] In a combination structure in which a resin bumper reinforcement to which an elastic bumper is attached and a chassis extension arm make surface contact and are attached via a hook, ribs are provided at the upper and lower ends of the opposing surface of the bumper reinforcement. At the same time, an assembly hole is drilled in the opposing surface, and a hook for engaging the rib and a screw fastening hook are provided at the upper and lower ends of the opposing surface of the arm, and a hook is provided from the arm into the assembly hole. A combination structure of a vehicle bumper reinforcement and an arm, characterized in that a mating protrusion is formed.