JP3218268B2 - Resin rear bumper structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention reduces the cost and improves the appearance by directly attaching a bumper body to a body and forming a front extending portion mounted and fixed on a horizontal plane at the rear end of the body. It relates to a resin rear bumper structure.

[0002]

2. Description of the Related Art A conventional rear bumper structure has a rigid structure in which one side is fixed to a rear end of a body B by a bolt, as shown in FIG. The other side of the high substantially L-shaped reinforcement R and the bracket K integrally formed with the bumper C are fixed by bolts.

In the conventional rear bumper structure, a gap G is formed between the rear end of the body B and the front end of the bumper C in order to prevent interference with the body B, as shown in FIG. .

[0004]

The above-mentioned conventional rear bumper structure requires a large reinforcement R for securing strength and bumper installation quality, and a bolt for fixing the reinforcement R to the body B, which increases the cost. There was a problem.

In the conventional rear bumper structure, it is necessary to provide a certain clearance G between the rear bumper structure and the body B in order to prevent interference with the body B. For this reason, there was a problem that the body color was seen from the gap between the bumper C and the back door, and the appearance was poor.

Accordingly, the present inventor has focused on the technical idea of the present invention of directly attaching the bumper body to the body, and as a result of further research and development, has eliminated the need for a large reinforcement and a bolt to reduce the cost. At the same time, the present invention has achieved the object of improving the appearance.

[0007]

According to a first aspect of the present invention, there is provided a resin rear bumper structure having a substantially U-shaped cross section including an upper surface, a rear surface, and a lower surface.
Extending forwardly from the upper surface portion of said bumper body, and the front extending portion which is location placing the body rear horizontal plane is projected in the vertical direction on the inner surface of the bumper body, the front end within the body rear vertical plane equivalent a plurality of reinforcing ribs is caused to contact, it is formed integrally with the front end of the reinforcing rib, and has a hook that is engaged with the engaging hole provided in the body rear vertical surface.

The resin rear bumper structure according to the present invention (the second invention according to the second aspect) is characterized in that, in the first invention, the upper surface of the bumper main body has an inclined surface that is inclined upward as it goes rearward, Further, the front extending portion is formed one step higher than the upper surface portion.

The resin rear bumper structure of the present invention (the third invention according to claim 3) is the resin rear bumper structure according to the second invention, wherein water is formed in a concave portion formed by the upper surface portion and the front extension portion of the bumper main body. A hole is provided.

In the resin rear bumper structure of the present invention (the fourth invention of the fourth aspect), in the second invention, only the center of the front extending portion is substantially the same as or larger than the upper surface portion of the bumper main body. It is formed low, and a cutout is provided in this portion to prevent interference with a striker fixed to the body side.

[0011]

[Action] resin rear bumper structure of the first invention having the above construction, the load acting on the bumper cover, the front extension portion extending forwardly from the upper surface portion of said bumper body mounting location
It said body rear horizontal being, acts on the engaging hole provided in the body rear vertical surface on which the hooks are integrally formed is engaged with the front end of the reinforcing rib.

In the resin rear bumper structure according to the second invention having the above-mentioned structure, the upper surface of the bumper main body is formed as an inclined surface which is inclined upward as it goes rearward, and the front extension portion is one step higher than the upper surface portion. Since the bumper body is formed to be high, a concave portion is eventually formed by the upper surface portion of the bumper main body and the front extension portion.

[0013] In the resin rear bumper structure according to the third aspect of the present invention, the drainage holes formed in the concave portion formed by the upper surface portion and the front extending portion of the bumper main body accumulate in the concave portion. It drains water.

In the resin rear bumper structure according to a fourth aspect of the present invention, the notch is provided only at the center of the front extending portion at a portion substantially equal to or lower than the upper surface of the bumper main body. To prevent interference with the striker fixed to the body side.

[0015]

The resin rear bumper structure according to the first aspect of the present invention, which has the above-mentioned effects, is characterized in that the load applied to the bumper cover is transferred to the horizontal plane at the rear end of the body and to the engaging hole provided at the vertical surface at the rear end of the body. Since they act, large-sized reinforcements and bolts are not required, thereby reducing costs and improving the appearance.

The resin rear bumper structure according to the second aspect of the present invention having the above-mentioned effects has the same effect as the first aspect of the invention, and also makes the bumper body look large because the upper surface of the bumper body is inclined. And the appearance is good, and the front extending portion is formed one step higher than the upper surface portion, so that the body color can be more invisible from the gap between the bumper body and the back door.

The resin rear bumper structure according to the third aspect of the present invention having the above-described effects has the same effects as the second aspect of the invention, and is provided in a recess formed by the upper surface portion and the front extending portion of the bumper main body. The water drain hole provided has an effect that water collected in the concave portion can be drained.

The resin rear bumper structure according to the fourth aspect of the present invention having the above-described effects has the same effects as the second aspect of the present invention, and has a portion substantially equal to or lower than the upper surface of the central portion of the front extending portion. Providing the cutouts has an effect of preventing interference with a striker fixed to the body side.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) As shown in FIGS. 1 to 5, a resin rear bumper structure according to a first embodiment has an upper surface portion 11 extending in the front-rear direction of a vehicle.
A rear surface portion 12 extending below the upper surface portion 11 in the height direction of the vehicle, and a lower surface portion 13 extending forward of the vehicle below the rear surface portion 12 and extending in the width direction of the vehicle. A bumper main body 1 having a substantially U-shaped cross section, a front extending portion 2 extending forward from an upper surface portion 11 of the bumper main body 1 and placed on front and rear surfaces of a body rear end, and an inner surface of the bumper main body 1 A predetermined gap is formed therebetween and extends in the up-down direction and the front-rear direction. The front end is brought into contact with the upper and lower surfaces of the rear end of the body, and is formed integrally with the front end. a hook 31 which is engaged in 41, is made of a plurality of reinforcing ribs 3 which includes a fixing portion 32 which is secured to at least the body rear face by one place in the right and left.

As shown in FIGS. 1 and 3, the upper surface 11 of the bumper main body 1 has an inclined surface that is inclined upward as it goes rearward, and the front extension 2 is one step higher than the upper surface 11. A substantially V-shaped concave portion 14 formed by the upper surface portion 11 of the bumper main body 1 and the front extending portion 2 is formed over substantially the entire length in the left-right direction of the vehicle.

As shown in FIG. 1 and FIG. 3, holes 15 for drainage are formed at the left and right ends of the V-shaped recess 14 at right and left ends thereof. It is configured such that accumulated water can be drained through the hole 15.

As shown in FIGS. 1 and 3, the front extending portion 2 is located on the rear end upper surface of the body B from the upper surface portion 11 except for the central portion where the striker 45 for the back door D is disposed. Along the front of the vehicle, and is placed so as to cover the upper surface of the rear end of the body.

As shown in FIGS. 3 and 5, a step is lowered at a central portion of the front extending portion 2 corresponding to the position where the striker 45 and the spare tire carrier 46 for the back door D are disposed. The step 21 is formed, and is fixed to the upper surface of the rear end of the body B by bolts through bolt holes at the left and right ends.

As shown in FIGS. 3 and 5, the central portion of the front extending portion 2 in the step portion 21 is cut out so that the notch portion 2 is formed.
2, a gap 23 is formed between the body 2 and the rear end of the body, and water is drained through the gap 23.

A trapezoidal concave portion 24 is formed at the rear end of the step portion 21 formed at the center of the front extending portion 2 corresponding to the striker 45 for the back door. It is configured to avoid interference with the lock device provided and to supply the water accumulated in the concave portion 14 to the step portion 21.

The reinforcing rib 3 is a member for supporting a vertical load acting on the bumper body 1, and as shown in FIG. 1 and FIG.
A lower surface portion 3 integrally formed at the lower end of the lower portion 2 so as to extend rearward;
The three members 30 are formed on the inside of the bumper main body 1 on the left and right sides of the vehicle.

As shown in FIGS. 1 and 4, the reinforcing ribs 3 are formed integrally with the upper ends of the left and right portions 302 on the lower surface of the upper surface portion 11 and at the rear end of the body B. The hook 31 that engages with the engaging hole 41 is formed integrally with the left and right portions 302.

Further, as shown in FIGS. 1 and 3, each of the reinforcing ribs 3 disposed at the left and right ends of the vehicle is provided with bolts for fixing to the lower surface of the rear end of the body B by bolts to prevent backlash. The fixing portion 3 having a bolt hole formed at the tip.
2 are formed integrally with the lower surface portion 303.

As shown in FIG. 3, both ends of the bumper main body 1 are fixed to the body B at three places by bolts on the rear side wall of the vehicle.

The resin rear bumper structure of the first embodiment having the above-described structure acts on the bumper main body 1 as if a worker steps on the upper surface of the bumper main body 1 when loading or unloading luggage. The load is applied to the upper surface of the rear end of the body on which the front extending portion 2 extending forward from the upper surface portion 11 is mounted and the hook 31 of the reinforcing rib 3 disposed on the inner surface of the bumper body 1. And acts on the engaging portion 41 at the rear end of the body.

Further, in the resin rear bumper structure of the first embodiment, when a load acts on the bumper main body 1, a moment about the upper surface of the rear end of the body on which the front extending portion 2 is placed as a fulcrum is generated. 1, and mainly acts on the engaging portion 41 at the rear end of the body B via a hook 31 formed integrally with the reinforcing rib 3 provided on the inner surface of the bumper main body 1.

Further, in the resin rear bumper structure of the first embodiment, the water accumulated in the recess 14 formed in the upper surface portion 11 in the left-right direction of the vehicle is removed from the drain hole 15 formed in the recess 14. It's something to pull out.

Further, the resin-made rear bumper structure of the first embodiment removes water collected at the center of the front extending portion 2.
A step 21 formed at a position where the striker for the back door D is disposed via the trapezoidal recess 24, and the gap 23 between the notch 22 formed in the step 21 and the body B. It is something that goes beyond.

The resin-made rear bumper structure of the first embodiment having the above-described operation is characterized in that the load applied to the bumper main body 1 is reduced by the plurality of reinforcing ribs 3 arranged on the inner surface of the bumper main body 1.
Since the body B is divided into and acts on the engaging portions 41 through the hooks 31 formed integrally with the body B, the load acting on the engaging portions 41 of the body B can be reduced.
It is possible for an operator to ride on the bumper cover 4 while holding the luggage, thereby eliminating the need for a conventional highly rigid reinforcement and bolts, thereby reducing costs and reducing the number of assembly steps. .

In the resin rear bumper structure of the first embodiment, the body color of the body B is provided between the back door D and the bumper body 1 by covering the upper surface of the rear end of the body with the front extending portion 2. Is not exposed, so that the appearance is improved.

Further, in the resin rear bumper structure of the first embodiment, most of the load and the moment acting on the bumper main body 1 are transferred to the body B through the hooks 31 of the reinforcing ribs 3. Since it acts on the portion 41, it has the effect of making the gap between the back door D and the bumper body 1 constant, and the load hardly acts on the fixing portion 32 to the body B. Since the fixing portion 32 is fixed for preventing the backlash, the fixing mode of the fixing portion 32 can be made simpler and easier.

Further, in the resin rear bumper structure of the first embodiment, the water accumulated in the concave portion 14 formed on the upper surface portion 11 is drained from the drain hole 15 formed in the concave portion 14. As a result, water can be drained without deteriorating the appearance as in the related art.

Further, in the resin rear bumper structure of the first embodiment, the notch 22 is formed in the step formed in the center of the front extension 2 corresponding to the striker 45 for the back door and the spare tire carrier 46. As a result, there is an effect that interference with the striker 45 for the back door is prevented.

The above-described embodiments have been described by way of example only, and the present invention is not limited to these embodiments. Those skilled in the art will recognize from the claims, the detailed description of the invention, and the drawings. Modifications and additions are possible without departing from the technical idea of the present invention.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along the line AA of FIG. 3 showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line BB of FIG. 3 showing a central portion of the first embodiment.

FIG. 3 is a perspective view showing a right half of the bumper body of the first embodiment.

FIG. 4 is a perspective view showing a reinforcing rib of the first embodiment.

FIG. 5 is a partial plan view showing a central portion of the first embodiment.

FIG. 6 is a sectional view showing a conventional rear bumper structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bumper main body 2 Front extension part 3 Reinforcement rib 11 Upper surface part 12 Rear surface part 13 Lower surface part 31 Hook 32 Fixing part 41 Engagement hole

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60R 19/03 B60R 19/24

Claims (4)

(57) [Claims] 1. A top portion, and the bumper body of a substantially U-shaped comprising a rear surface portion and lower surface portion, extending forwardly from the upper surface portion of said bumper body, the front extending portion which is location placing the body rear horizontal surface A plurality of reinforcing ribs projecting vertically from the inner surface of the bumper main body and having a front end abutting against a body rear end vertical surface, and integrally formed at a front end of each reinforcing rib, and a body rear end vertical surface resin rear bumper structure, characterized in that it comprises a hook which is engaged with the engaging hole provided in. 2. The bumper body according to claim 1, wherein the upper surface of the bumper main body has an inclined surface that is inclined upward toward the rear, and the front extending portion is formed one step higher than the upper surface. Features a resin rear bumper structure. 3. The resin rear bumper structure according to claim 2, wherein a drainage hole is provided in a concave portion formed by the upper surface portion and the front extending portion of the bumper main body. 4. The bumper according to claim 2, wherein only the center of the front extending portion is formed to be substantially the same as or lower than the upper surface portion of the bumper main body, and further prevents interference with a striker fixed to the body side at this portion. The rear bumper structure made of resin characterized by the notch for the use.