JP2012240431A - Vehicle rear structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent water coming via a clearance between a back door and a rear bumper from entering a vehicle interior with the back door closed in a vehicle rear structure provided with the back door which can be opened downward with respect to a vehicle rear opening.SOLUTION: The rear bumper 1 has a vertical surface part 6 on the upper end thereof, the surface covering the upper part of a lower back panel 25 and being covered by the back door 20 when closed. On a corner part 5 in the vehicle width direction of the vertical surface part of the rear bumper, a groove 8 extended in a predetermined length is formed along a gap 30 formed between the back door and the rear bumper when the back door is closed.

Description

  The present invention relates to a rear structure of a vehicle in which a back door (trunk lid) is provided so as to be able to open downward with respect to a rear opening (loading room) of the vehicle, and in particular, when the back door is closed, the door and the rear bumper. The present invention relates to a rear structure of a vehicle that prevents water entering from a gap between the vehicle and the vehicle from entering the passenger compartment.

  In the rear structure of the vehicle in which the back door is provided so that the back door can be opened downward with respect to the rear opening of the vehicle, the front view of FIG. 3 (the back door is opened) and the sectional view of FIG. As shown in the closed state), the upper portion 50a of the rear bumper 50 is designed so that the bumper surface extends to the vicinity of the upper end of the lower back panel 52 in consideration of the appearance when the back door 51 is opened. Covered.

In addition, when the back door 51 is closed as shown in FIG. 4, a predetermined gap 54 (for example, 6 mm) is formed between the lower end of the back door 51 and the surface of the rear bumper 50. Further, it is configured to absorb the downward overstroke when the back door 51 is strongly closed.
Further, by providing the gap 54, when the back door 51 is closed, the latch mechanism (not shown) can function reliably and the back door 51 can be locked.

  However, since the gap 54 is provided as described above, when the back door 51 is closed and, for example, high pressure water is jetted to the rear bumper 50 by a high pressure washer, as shown by the arrow in FIG. The jet water passes through the gap 54 and enters the back side of the back door 51. Therefore, a weather strip 53 made of an elastic material for preventing rainwater from entering is provided at the upper edge of the lower back. When the back door 51 is closed as shown in FIG. It is made elastically in contact with the back surface of 51 and is not flooded into the room 60 (see, for example, Patent Document 1).

JP 2009-67167 A

However, when high pressure water is injected into the rear bumper 50 as described above, the high pressure water flows into the bumper upper portion 50a of the corner portion 70 shown in FIG. When the pressure applied to the weather strip 53 increases and exceeds the allowable reaction force of the weather strip 53, there is a problem that water enters the chamber 60.
Conventionally, such a problem has been dealt with by partially adding latex to the weather strip 53 to increase the reaction force of the weather strip 53 at the corner portion 70.
However, when the reaction force of the weather strip 53 is partially different, there is a problem that the closing performance of the back door 51 is lowered and the cost for adding latex is increased.

  The present invention has been made paying attention to the above points, and in a rear structure of a vehicle in which the back door is provided to be able to open downward with respect to the rear opening of the vehicle, the door is closed when the back door is closed. It is an object of the present invention to provide a rear structure of a vehicle that can prevent water entering from a gap between the vehicle and a rear bumper from entering the vehicle interior.

In order to solve the above-described problems, a vehicle rear structure according to the present invention is provided with a rear bumper that is fixed to the lower back panel and has a back door that can be opened downward with respect to the rear opening of the vehicle. The rear bumper has an upright portion that covers an upper portion of the lower back panel at an upper end of the rear bumper and is covered with the back door when the back door is closed. In the corner portion in the vehicle width direction, a groove portion extending to a predetermined length is formed along a gap generated between the back door and the rear bumper when the back door is closed. It has the feature in being.
In addition, it is preferable that the step portion formed on the upper side of the groove portion so as to form the groove portion is formed at a position covered by the back door when the back door is closed.
Further, the corner portion of the elevation surface portion is formed such that the elevation surface portion extends upward to form a corner elevation surface portion, and the groove portion includes a first groove portion formed laterally in the elevation surface portion, and It is desirable that the corner elevation surface portion has a second groove portion formed in the vertical direction, and the first groove portion and the second groove portion are connected to each other.

With this configuration, even if high-pressure water enters the corner from the gap formed between the back door and the rear bumper, the high-pressure water bounces off at the stepped portion of the groove and forms an eddy current outside the back door. It can be drained. Further, since the water pressure is dispersed by the groove portion, the amount of water reaching the weather strip and the water pressure can be greatly reduced, and the intrusion of water into the vehicle compartment can be prevented.
Further, according to this configuration, since it is not necessary to add latex to improve the reaction force of the weather strip as in the conventional case, the reaction force of the weather strip becomes uniform, and the closing performance of the back door can be improved. it can. Moreover, the cost concerning latex addition can be reduced.

Moreover, it is desirable that the first groove portion and the second groove portion are formed so that the depth of the groove gradually decreases from one end side to the other end side where they are connected.
By comprising in this way, the water which flowed into the corner part can be made to flow easily to a vehicle width center side along a groove, without collecting in a groove.

In addition, it is desirable that the inclination angle of the surface of the vertical surface portion and the inclination angle of the bottom surface of the concave portion of the groove portion are formed at the same angle.
As a result, even when the elevational surface portion and the recess bottom surface of the groove portion can be seen from the gap when the back door is closed, the reflection angle of the external light to both is the same, so that the groove portion does not affect the design surface of the vehicle. be able to.

  According to the present invention, in a rear structure of a vehicle in which a back door is provided so as to be able to open downward with respect to a rear opening of the vehicle, the vehicle interior of water entering through a gap between the door and the rear bumper in a state where the back door is closed. The rear structure of the vehicle that can prevent the vehicle from entering the vehicle can be obtained.

FIG. 1 is a perspective view showing a part of a rear bumper provided in a rear structure of a vehicle according to the present invention. When a back door that can be opened downward with respect to a rear opening (loading room) of the vehicle is closed, It is a figure containing the part (part) covered with the lower end part of a door. FIG. 2 is a cross-sectional view taken along the line AA of FIG. FIG. 3 is a front view of a conventional rear structure of a vehicle in which a back door is provided to be able to open downward with respect to the rear opening of the vehicle. FIG. 4 is a cross-sectional view of a conventional rear structure of a vehicle in which a back door is provided to be able to open downward with respect to the rear opening of the vehicle.

Embodiments of a rear structure of a vehicle according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a part of a rear bumper provided in a rear structure of a vehicle according to the present invention. When a back door that can be opened downward with respect to a rear opening (loading room) of the vehicle is closed, It is a figure containing the part (part) covered with the lower end part of a door. FIG. 2 is a cross-sectional view taken along the line AA of FIG.
In FIG. 1, only one side in the vehicle width direction is shown, but on the other side, the illustrated shape is formed symmetrically.

As shown in FIG. 1, the rear bumper 1 is erected from a vertical wall portion 2, a horizontal wall portion 3 continuously formed from the upper portion of the vertical wall portion 2, and a rear end portion of the horizontal wall portion 3. And an upright portion 4. The upright surface portion 4 is covered with the back door 20 when the back door 20 (see FIG. 2) that can be opened downward is closed.
Further, in the corner portion 5 in the vehicle width direction, as shown in FIG. 1, the lateral wall portion 3 is erected while being curved upward, and accordingly, the elevation surface portion 4 extends upward, and the corner elevation surface portion. 6 is formed.
A bolt hole 7 for fixing the rear bumper 1 to a lower back panel 25 (see FIG. 2) provided at the rear of the vehicle is provided at the upper portion of the corner elevation 6.

Further, as shown in FIG. 2, a flange 25a is formed at the upper end of the lower back panel 25, and a weather strip 26 for preventing intrusion of rainwater or the like is attached thereto.
As shown in the drawing, when the back door 20 comprising the outer panel 20a and the inner panel 20b is closed, the weather strip 26 is elastically brought into contact with the back surface (inner panel 20b) of the back door 20 so as to shut off the vehicle interior and the outside air side. It has become.

Further, in the embodiment according to the present invention, as a characteristic configuration, the corner portion 5 shown in FIG. 1 is provided with a step groove 8 (groove portion) that is loosely bent in a “U” shape. The step groove 8 includes a first groove portion 8A extending in the lateral direction (vehicle center side) at the vertical surface portion 4, and a second groove portion extending in the vertical direction (upward) at the corner vertical surface portion 6. 8B is connected.
The connecting portion, that is, the bent portion 8c is set at the end in the vehicle width direction of the vertical surface portion 4 where water such as high-pressure water or rainwater tends to concentrate in the rear bumper 1.
In the step groove 8, as shown in FIG. 2, the horizontal wall 3 is connected to the lower end side of the bottom surface 8a of the recess, and the step portion 8b having the maximum step (drop) dimension d1 is connected to the upper end side of the recess bottom surface 8a. Is formed.

  As shown in FIG. 2, the stepped portion 8 b is formed so as to be positioned at least above the gap 30 generated between the stepped portion 8 b and the lateral wall portion 3 when the backdoor 20 is closed (that is, the backdoor 20 The step portion 8b is covered by the above). The width of the recess bottom surface 8a determined by the position of the stepped portion 8b is set to a substantially constant dimension h1 from one end side to the other end side in the longitudinal direction.

  By providing the step groove 8 in the corner portion 5 in this manner, even if high-pressure water enters the corner portion 5 from the gap 30, the high-pressure water bounces off at the step portion 8 b of the step groove 8 and forms a vortex flow. 20 can be drained to the outside. Furthermore, since the water pressure is dispersed by the step groove 8, the amount of water reaching the weather strip 26 and the water pressure can be greatly reduced.

The step groove 8 (step portion 8b) is preferably formed so that the maximum step size is d1 at the bent portion 8c and the step is gradually reduced toward both ends of the groove (that is, the first groove portion 8A). And the second groove 8B are preferably formed so that the depth of the groove gradually decreases from one end side to the other end side where the second groove portion 8B is connected.
That is, in the corner part 5 where high-pressure water from rainwater or a high-pressure washing machine is likely to gather, the largest step (d1 is a large dimension) is formed so that the water that has entered the back side of the back door 20 passes over the step part 8b. Can be prevented from flowing to.
Further, by forming the step gradually smaller toward the both end sides of the groove as described above, the water flowing into the corner portion 5 can be easily flowed along the groove toward the center in the vehicle width direction without being accumulated in the groove. it can.
The width dimension h1 and the maximum step dimension d1 of the step groove 8 take into account the height dimension h2 of the gap 30 when the back door 20 is closed, the depth dimension d2 from the gap 30 to the bottom surface 8a of the recess, and the like. Can be set.

  Further, as shown in FIG. 2, the inclination angle θ of the recess bottom surface 8 a of the step groove 8 with respect to the vehicle traveling direction is the same as the inclination angle of the vertical surface portion 4. Thus, even when the upright portion 4 and the recessed portion bottom surface 8a of the step groove 8 can be seen from the gap 30 in a state where the back door 20 is closed, the reflection angle of the external light to both is the same, and the step groove 8 is the design of the vehicle. The surface can be prevented from being affected.

As described above, according to the embodiment of the present invention, in the corner portion 5 of the rear bumper 1 provided in the rear structure of the vehicle, the step groove 8 (the bottom surface 8a of the recess) is formed along the gap 30 generated when the back door 20 is closed. ) Is formed, and the step portion 8 b of the step groove 8 is formed at a position covered by the back door 20. Further, the stepped portion 8b is formed such that the stepped portion 8b has a maximum step at the bent portion 8c, and the stepped portion gradually decreases toward both ends of the groove.
With this configuration, even if high-pressure water enters the corner portion 5 from the gap 30, the high-pressure water bounces off at the step portion 8b of the step groove 8 and flows along the step groove 8 while forming a vortex. It can drain efficiently to the outside. Further, since the water pressure is dispersed by the step groove 8, the amount of water and the water pressure reaching the weather strip 26 can be greatly reduced, and the intrusion of water into the vehicle compartment can be prevented.
Further, since it is not necessary to add latex to improve the reaction force of the weather strip 26 as in the prior art, the reaction force of the weather strip 26 becomes uniform, and the closing performance of the back door 20 can be improved. Moreover, the cost concerning latex addition can be reduced.

In the above-described embodiment, the stepped portion 8b is formed to have the maximum step at the bent portion 8c, and the stepped portion gradually decreases toward both ends of the groove. It is not something.
For example, a groove region having a predetermined length in the longitudinal direction of the step groove 8 may have a maximum step size, and the bent portion 8c may be included therein.
Further, the stepped groove 8c may be configured to have a substantially constant groove depth from one end to the other end of the groove instead of forming the step gradually from the bent portion 8c toward both ends of the groove. The high-pressure water can be rebounded by the step portion 8b.

DESCRIPTION OF SYMBOLS 1 Rear bumper 2 Vertical wall part 3 Horizontal wall part 4 Elevation surface part 5 Corner part 6 Corner elevation surface part 8 Step groove 8A First groove part 8B Second groove part 8a Recess bottom face 8b Step part 8c Bending part 20 Back door 25 Lower back panel 26 Weather Strip 30 Gap

Claims (5)

A rear structure of the vehicle including a rear bumper fixed to the lower back panel, with a back door provided so as to be able to open downward with respect to the rear opening of the vehicle,
The rear bumper has an upper surface that covers an upper portion of the lower back panel at an upper end of the rear bumper and is covered with the back door when the back door is closed.
In the elevation part of the rear bumper, in the corner part in the vehicle width direction,
A rear structure of a vehicle, wherein a groove extending to a predetermined length is formed along a gap formed between the back door and the rear bumper when the back door is closed. The step part formed on the upper side of the groove part so that the groove part is formed,
The rear structure of the vehicle according to claim 1, wherein the rear structure is formed at a position covered by the back door when the back door is closed. In the corner portion of the elevation surface portion, the elevation surface portion extends upward to form a corner elevation surface portion,
The groove portion includes a first groove portion formed in the lateral direction in the elevation surface portion, and a second groove portion formed in the vertical direction in the corner elevation surface portion, and the first groove portion and the second groove portion. The rear part structure of the vehicle according to claim 1, wherein the rear part structure is connected to the groove part of the vehicle.   The first groove portion and the second groove portion are formed so that the depth of the groove gradually decreases from one end side to the other end side where they are connected. 3 is a rear structure of a vehicle.   5. The rear structure of a vehicle according to claim 1, wherein the inclination angle of the surface of the vertical surface portion and the inclination angle of the bottom surface of the concave portion of the groove portion are formed at the same angle. .

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