JP4664875B2 - Vehicle rear door structure - Google Patents

Description

  The present invention relates to a rear door structure of a vehicle, and more particularly to a flip-up type rear door structure that is hinged to an upper edge of a vehicle tailgate opening.

Conventionally, as a rear-up type rear door structure, a pair of connected reinforcements composed of separate parts are formed in a V shape from the lower part of the frame part toward both sides in a frame part that is shaped along the outer shape of the rear door. The lower part of each connected reinforcement is connected via a lock reinforcement attached at the center of the lower part of the frame, and the upper part of each connected reinforcement is connected via a corner reinforcement attached to the left and right of the frame. Each is connected. Thus, by providing each reinforcement which becomes another component, the rigidity of a rear door is raised (for example, refer to patent documents 1).
JP-A-8-258568 (FIG. 1)

  However, in such a conventional rear door structure, although the rigidity of the rear door can be increased, there is a problem that the weight due to reinforcement increases. Moreover, since it is necessary to connect each reinforcement with welding, there also exists a problem that a manufacturing process increases.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a vehicle rear door structure capable of simplifying a work process during manufacturing while ensuring sufficient rigidity.

The invention according to claim 1 is a rear door structure of a vehicle having an inner panel disposed on the inner side of the vehicle and an outer panel disposed on the outer side of the vehicle, wherein the inner panel has a shape along the outer shape of the rear door. A frame portion, a pair of reinforcement portions that are integrally formed with the frame portion and that extend in a substantially V shape from the lower side of the frame portion toward both side portions, and an opening surrounded by the frame portion and the reinforcement portion The inner panel is formed smoothly and continuously on the edge of the opening from the side of the frame to the reinforcement, and extends in the direction along the opening and closing direction of the rear door. has a face, after bending from the tip of the face portion in a direction intersecting with the opening direction, the step portion which is bent in the direction along the opening and closing direction is made form continuously along the extending direction, the frame portion Between the side portions and the reinforcing portion A separate transverse beam attached so as to extend across, and an end portion of the transverse beam is formed to extend in a direction along the opening / closing direction and extends in a direction along the opening / closing direction of the stepped portion. It is characterized by being connected to a surface .

According to this, in the configuration in which the V-shaped reinforcing portion is integrally formed on the inner panel and the frame portion and the reinforcing portion are formed smoothly and continuously, by forming the step portion, Since the bending rigidity can be increased, the rigidity of the rear door can be increased. In addition, since the reinforcing portion is formed integrally with the frame portion, it is not necessary to connect the reinforcing portion by welding or the like, and the work process during manufacturing can be simplified. Further, the rigidity of the rear door can be further increased by coupling the transverse beam at the stepped portion. In addition, since the surface portion is formed to extend in the direction along the opening / closing direction of the rear door, it is possible to ensure high rigidity with respect to the load when the rear door is opened / closed. Further, by forming the end portion of the transverse beam in a direction along the opening / closing direction of the rear door, it is possible to secure a higher rigidity against the load when the rear door is opened / closed.

According to a second aspect of the present invention, the stepped portion is bent in a direction along the opening / closing direction after being bent in a direction intersecting the opening / closing direction from the tip of the surface portion, and the lateral beam the surface of the opening side of the end portion, and the opening side of the stepped portion characterized in that it is joined on the opposite side.

  The invention according to claim 3 is characterized in that a corner stiffener provided across the inner panel is provided at an end of the transverse beam, and the corner stiffener is coupled to the stepped portion. According to this, the rigidity of the rear door can be further increased by providing the corner stiffener. The corner stiffener may be integrated with the transverse beam.

In the invention according to claim 4 , the surface portion, the end portion of the transverse beam coupled to the stepped portion, and the coupling portion of the corner stiffener are formed to extend in a direction along the opening / closing direction of the rear door. It is characterized by. According to this, even higher rigidity can be ensured with respect to the load when the rear door is opened and closed.

  ADVANTAGE OF THE INVENTION According to this invention, the rear part door structure of the vehicle which can simplify the work process at the time of manufacture can be provided, ensuring sufficient rigidity.

(First embodiment)
Next, the rear door structure of the vehicle according to the first embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a partial perspective view of a vehicle to which a rear door structure according to the first embodiment is applied. FIG. 2 is a perspective view showing an inner panel constituting the rear door structure according to the first embodiment as viewed from the outside of the vehicle. 3 is a cross-sectional view taken along the line AA of FIG. 2, and FIG. 4 is a side view of the inner panel in the first embodiment.

  As shown in FIG. 1, the rear door structure of the vehicle V according to the first embodiment is applied to a rear door 2 that opens and closes an opening 3 provided at the rear of the vehicle V. Incidentally, the rear door 2 is configured such that a side edge portion on the upper end side and a side edge portion on the upper end side of the opening portion 3 are rotatably connected by a pair of hinges 4, 4. It has a flip-up structure that opens and closes as a fulcrum. A locking device (not shown) is disposed at the center of the lower portion of the rear door 2, and the rear door 2 is locked to the vehicle body V1 side by this locking device.

  The rear door 2 includes an outer panel 5 that is disposed outside the vehicle and forms the outer surface of the vehicle V, and an inner panel (also referred to as an inner frame) 6 that is disposed inside the outer panel 5. A rear window 7 and lamps are attached to the outer panel 5.

  As shown in FIG. 1, the inner panel 6 includes a frame portion 9 having a shape that follows the outer shape of the rear door 2, and a pair of reinforcing portions 10 a and 10 b that are integrally formed with the frame portion 9.

  The frame portion 9 is obtained by press-molding a metal plate. As shown in FIG. 2, the frame portion 9 is formed so that the outer contour thereof is substantially rectangular. On the inner side, a substantially rectangular opening 12 is formed in plan view.

  The reinforcing portions 10a and 10b are elongated and have a predetermined width. From the lower portion 9c of the frame portion 9, specifically, from the central portion in the vehicle width direction of the lower portion 9c, toward the side portions 9a and 9b of the frame portion 9. Extends substantially in a V shape. The inner panel 6 has a substantially home-base-shaped opening 12 surrounded by the frame portion 9 positioned on the upper side and the reinforcing portions 10a and 10b, and an approximate shape surrounded by the frame portion 9 positioned on the lower side and the reinforcing portion 10a. A triangular opening 13 and a substantially triangular opening 14 surrounded by the lower frame portion 9 and the reinforcing portion 10b are formed. Incidentally, in the present embodiment, the position where the reinforcing portions 10a and 10b are connected to the both side portions 9a and 9b of the frame portion 9 is set to a height position near the lower edge portion of the rear window 7 (see FIG. 1). Yes.

  As shown in FIG. 2, the inner panel 6 has a surface portion 16 a formed on the edge of the opening 12 smoothly and continuously from the side portions 9 a and 9 b of the frame portion 9 to the reinforcing portions 10 a and 10 b. 16b. Further, the surface portions 16a and 16b protrude and stand in a direction toward the outer panel 5 (see FIG. 1) with respect to the frame portion 9, that is, a direction toward the vehicle outer side, and follow the opening / closing direction of the rear door 2. It extends in a direction (see FIGS. 3 and 4).

  Step portions 17a and 17b are formed at the tips of the surface portions 16a and 16b along the extending directions Ea and Eb of the surface portions 16a and 16b. The stepped portions 17a and 17b are formed to have a stepped shape having an L-shaped cross section so as to be located inside the opening 12 with respect to the surface portions 16a and 16b (see FIG. 3).

As shown in FIG. 3, the width (projection length) W1 of the surface portion 16a and the width (step) W2 of the step portion 17a are formed to be substantially constant along the extending direction Ea (see FIG. 2 ) . Has been. Further, the surface portion 16b is formed with a substantially constant width (W1, W2) in the same manner as described above along the extending direction Eb (see FIG. 2 ).

  Further, as shown in FIG. 2, the reinforcing portion 10 a is formed with a cut-and-raised portion 18 a at the edge of the opening 13 so as to protrude in the direction toward the outer panel 5 (see FIG. 1), that is, the vehicle outer side. ing. In the reinforcing portion 10a, a cut-and-raised portion 19a is formed at the edge of the opening 12 so as to protrude in the same direction as the cut-and-raised portion 18a. In the reinforcing portion 10b, similarly to the reinforcing portion 10a, a cut-and-raised portion 18b is formed at the edge of the opening 14, and a cut-and-raised portion 19b is formed at the edge of the opening 12. The tips of the cut-and-raised portions 18a, 18b, 19a, and 19b are joined to the outer panel 5 (see FIG. 1).

Next, the effect of the rear door structure of the vehicle V according to the first embodiment will be described.
In the rear door structure according to the first embodiment, as described above, by forming the stepped portions 17a and 17b on the surface portions 16a and 16b, compared to the case of the rear door structure in which the stepped portions 17a and 17b are not provided. Since the bending rigidity at the surface portions 16a and 16b is increased, the rigidity of the inner panel 6 (rear door 2) can be increased.

  Furthermore, in the rear door structure according to the first embodiment, since the frame portion 9 and the reinforcing portions 10a and 10b are integrally formed by press molding or the like, unlike the conventional rear door structure, a plurality of reinforcements are used. It is not necessary to reinforce. This eliminates the need for welding for connecting the reinforcements, thereby simplifying the manufacturing process during manufacturing.

  Furthermore, in the rear door structure according to the first embodiment, as shown in FIG. 3, the surface portion 16a (16b) is formed to extend in a direction along the opening / closing direction of the rear door 2 (see FIG. 4). The direction in which the surface of the surface portion 16a (16b) extends (the direction resistant to stress) is set to be equal to the direction of the load F acting on the rear door 2 when the rear door 2 is opened and closed (see FIGS. 3 and 4). Yes. Thereby, the rigidity of the inner panel 6 can be kept high with respect to the load F received by the rear door 2, and the rigidity of the rear door 2 can be secured high. Note that the direction of the load F shown in FIG. 4 is an example, and the direction changes with the direction in which the surface of the surface portion 16a (16b) extends, although the direction changes when the rear door 2 is opened and closed and at a position in the middle of opening and closing. The rigidity of the rear door 2 can always be ensured high.

(Second Embodiment)
Next, a rear door structure of the vehicle V according to the second embodiment of the present invention will be described in detail with reference to FIGS. FIG. 5 is a perspective view showing a state in which an inner panel constituting the rear door structure according to the second embodiment is viewed from the vehicle outer side. 6 is an exploded view of the transverse beam and the corner stiffener, FIG. 7 is a cross-sectional view taken along the line BB of FIG. 5, and FIG. 8 is a side view of the inner panel in the second embodiment. The rear door structure according to the second embodiment is configured in the same manner as the first embodiment except that the rear door structure according to the first embodiment is different from the inner panel. In addition, the inner panel will be described, and the same components as those in the first embodiment will be denoted by the same reference numerals, and detailed description thereof will be omitted.

  As shown in FIG. 5, the rear door structure of the vehicle V according to the second embodiment has a configuration in which a lateral beam 20 and a pair of corner stiffeners 30 a and 30 b are added to the inner panel 6. In addition, since the part except the horizontal beam 20 and the corner stiffeners 30a and 30b is the same as that of the inner panel 6 demonstrated in 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  The lateral beam 20 is formed separately from the inner panel 6 (the frame portion 9 and the reinforcing portions 10a and 10b), and the connecting portion Sa between the side portions 9a and 9b of the frame portion 9 and the reinforcing portions 10a and 10b. , Sb are attached so as to extend in the vehicle width direction. Further, the transverse beam 20 is formed in an arc shape so as to protrude in the direction toward the vehicle outer side (rear side), and the outer surface (outer panel 5 (see FIG. 1)) of the rear door 2 (see FIG. 1). It is formed to be curved along the outer surface. Further, the lateral beam 20 is configured to be disposed along the lower edge of the rear window 7 (see FIG. 1).

As shown in FIG. 6, the lateral beam 20 is formed to gradually widen from the center in the vehicle width direction to both sides, and both end portions 21a and 21b are stepped portions 17a and 17b (surface portions 16a and 16b). 16b) is formed to be bent toward the vehicle interior with a substantially constant width along the extending directions Ea and Eb (see FIG. 2 ). Further, as shown in FIG. 7, the end portions 21a and 21b are formed to extend in a direction along the opening / closing direction of the rear door 2 (see FIG. 8). The end portion 21a is attached to the stepped portion 17a. At this time, the inner surface of the end portion 21a (the right side surface in FIG. 7) and the outer surface of the stepped portion 17a (the left side surface in FIG. 7) are contacted. It is designed to be joined in contact.

As shown in FIG. 5, the corner stiffeners 30a and 30b are so-called reinforcing members, and straddle the inner panel 6 at the connecting portions Sa and Sb between the side portions 9a and 9b of the frame portion 9 and the reinforcing portions 10a and 10b. It is provided as such. Further, the corner stiffeners 30a and 30b are formed of a flat plate-like member, and extend in the extending directions Ea and Eb (see FIG. 2 ) of the stepped portions 17a and 17b (surface portions 16a and 16b) at the edge on the opening 12 side . The connecting portions 31a and 31b are formed so as to be bent to the outside of the vehicle with substantially the same width as the step portions 17a and 17b. In addition, when attaching the coupling | bond part 31a to the level | step-difference part 17a, as shown in FIG. 7, the coupling | bond part 31a is couple | bonded so that it may overlap with the edge part 21a of the horizontal beam 20 couple | bonded with the level | step-difference part 17a.

  In addition, the actual attachment procedure of the transverse beam 20 and the corner stiffeners 30a and 30b is performed after the end portions 21a and 21b of the transverse beam 20 and the joint portions 31a and 31b of the corner stiffeners 30a and 30b are joined by welding or the like. The end portions 21a and 21b and the coupling portions 31a and 31b coupled to each other are coupled to the step portions 17a and 17b by welding or the like. Further, the portions other than the coupling portions 31a and 31b of the corner stiffeners 30a and 30b are coupled to the side portions 9a and 9b of the frame portion 9 and the reinforcing portions 10a and 10b by welding or the like.

Next, the effect of the rear door structure of the vehicle V according to the second embodiment will be described.
In the rear door structure according to the second embodiment, the bending rigidity at the surface portions 16a and 16b is increased by forming the step portions 17a and 17b on the surface portions 16a and 16b, as in the operation and effect of the first embodiment. Therefore, the rigidity of the inner panel 6 (rear door 2) can be increased.

  Furthermore, in the rear door structure according to the second embodiment, the end portions 21a and 21b of the lateral beam 20 are coupled to the stepped portions 17a and 17b, that is, coupled to the portion having the highly rigid surface portions 16a and 16b. The rigidity of the inner panel 6 (rear door 2) is further increased.

  Furthermore, in the rear door structure according to the second embodiment, since the corner stiffeners 30a and 30b are provided, the rigidity at the joint portion between the inner panel 6 and the lateral beam 20 is increased, and the inner panel 6 (the rear door 2) is increased. ) Is further enhanced.

  Further, in the rear door structure according to the second embodiment, as shown in FIG. 7, the surface portion 16 a (16 b), the end portion 21 a (21 b) of the transverse beam 20 coupled to the stepped portion 17 a (17 b), and the corner stiffener Since all of the coupling portions 31a (31b) of 30a (30b) are formed so as to extend in the direction along the opening / closing direction (direction of FIG. 8) of the rear door 2, the rear portion with respect to the load F received by the rear door 2 The rigidity of the door 2 can be secured high.

  Furthermore, in the rear door structure according to the second embodiment, the number of component setting steps can be reduced by integrating the horizontal beam 20 and the corner stiffeners 30a and 30b in advance.

  In addition, this invention is implemented in various forms, without being limited to each said embodiment. For example, in the second embodiment, the lateral beam 20 and the corner stiffeners 30a and 30b are separately described. However, as shown in FIG. 9, the lateral beam 40 and the corner stiffeners 50a and 50b are integrated. It may be configured. In this case, fixing portions 40a and 40b are formed at the boundary portions between the corner stiffeners 50a and 50b and the lateral beam 40 so as to extend along the extending direction of the step portions 17a and 17b (surface portions 16a and 16b). The fixed portions 40a and 40b are portions corresponding to the end portions 21a and 21b of the transverse beam 20 and the coupling portions 31a and 31b of the corner stiffeners 30a and 30b.

  In the embodiment shown in FIG. 9, as shown in FIG. 10, the surface portion 16 a (16 b) and the fixing portion 40 a (40 b) are formed so as to extend in the direction along the opening / closing direction of the rear door 2. It is possible to ensure high rigidity. Further, since the transverse beam 40 and the corner stiffeners 50a and 50b are integrally formed, the number of times of welding can be reduced as compared with the second embodiment, and the work process can be simplified.

  In the second embodiment, the horizontal beam 20 and the corner stiffeners 30a and 30b are provided. However, only the horizontal beam 20 may be used.

1 is a partial perspective view of a vehicle to which a rear door structure according to a first embodiment is applied. It is a perspective view which shows a mode that the inner panel which comprises the rear door structure which concerns on 1st Embodiment was seen from the vehicle outer side. It is AA sectional drawing of FIG. It is a side view of the inner panel in 1st Embodiment. It is a perspective view which shows a mode that the inner panel which comprises the rear door structure which concerns on 2nd Embodiment was seen from the vehicle outer side. It is an exploded view of a transverse beam and a corner stiffener. It is BB sectional drawing of FIG. It is a side view of the inner panel in 2nd Embodiment. It is a perspective view which shows the modification of the reinforcement member in 2nd Embodiment. It is CC sectional drawing of FIG.

Explanation of symbols

2 Rear door 5 Outer panel 6 Inner panel 9 Frame portion 10a, 10b Reinforcement portion 16a, 16b Surface portion 17a, 17b Stepped portion 20 Horizontal beam 21a, 21b End portion 30a, 30b Corner stiffener 31a, 31b Joint portion V vehicle

Claims (4)

A vehicle rear door structure having an inner panel disposed on the inner side of the vehicle and an outer panel disposed on the outer side of the vehicle,
The inner panel has a frame portion having a shape along the outer shape of the rear door;
A pair of reinforcing portions that are integrally formed with the frame portion and extend in a substantially V shape from the lower side of the frame portion toward both side portions;
An opening surrounded by the frame portion and the reinforcing portion ,
The inner panel has a surface portion that is formed smoothly and continuously from the side of the frame portion to the reinforcing portion at the edge portion of the opening portion and extends in a direction along the opening / closing direction of the rear door ,
After bent in a direction intersecting the opening and closing direction from a distal end of the surface portion, the stepped portion which is bent in the direction along the opening and closing direction is made form continuously along the extending direction,
A separate transverse beam attached so as to extend between the connecting portions of the side portion of the frame portion and the reinforcing portion;
An end portion of the transverse beam is formed to extend in a direction along the opening / closing direction, and is coupled to a surface of the stepped portion extending in a direction along the opening / closing direction .   The stepped portion is bent in a direction along the opening / closing direction after being bent in a direction intersecting the opening / closing direction and the opening side from the tip of the surface portion,
  The vehicle rear door structure according to claim 1, wherein a surface of the end portion of the transverse beam on the opening portion side is joined to a surface of the stepped portion on a side opposite to the opening portion side. . The end of the transverse beam, the corner stiffener provided across the inner panel is provided, the corner stiffener is claimed in claim 1 or claim 2, characterized in that it is coupled to the stepped portion Vehicle rear door structure.   The said surface part, the edge part of the said horizontal beam couple | bonded with the said level | step-difference part, and the coupling | bond part of the said corner stiffener are extended and formed in the direction in alignment with the opening-and-closing direction of the said rear door. Rear door structure of the described vehicle.

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