JP2007196826A - Rear door structure of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rear door structure of a vehicle which has a sufficient rigidity while reducing the weight, and can reduce working steps in manufacturing, and the manufacturing cost. <P>SOLUTION: The rear door structure 1a of the vehicle V has an inner panel 6a disposed in a cabin inside, and an outer panel 5 disposed in a cabin outside. The inner panel 6a is equipped with a frame part 9 having the shape along the outline of the rear door 2, and a pair of reinforcing parts 10a, 10b which are integrally molded with the frame part 9 and extend in appropriately V shape from the lower part side of the frame part 9 toward both side part sides. <P>COPYRIGHT: (C)2007,JPO&INPIT

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 flip-up type rear door structure, a structure having an inner panel in which a horizontal frame portion is integrally formed so as to partition the frame portion in a vertical direction is known on a frame portion having a shape along the outer shape of the rear door. (For example, refer to Patent Document 1). Here, FIG. 7 is a schematic diagram for explaining the configuration of the conventional rear door structure, and is a view seen from the rear side of the vehicle. As shown in FIG. 7, the rear door structure 101 of the vehicle V includes an inner panel 106 including a frame portion 109 and a horizontal frame portion 118, and the frame portion 109 and the horizontal frame portion 118 above the horizontal frame portion 118. The window glass 107 is attached to the opening 112a that is defined by A pair of connection reinforcements 100a is disposed in the opening 112b where the frame portion 109 and the horizontal frame portion 118 are partitioned below the horizontal frame portion 118. The lower end side of each connection reinforcement 100a is welded to the frame portion 109 via a lock reinforcement 100b attached to the lower center of the frame portion 109, and each of the connection reinforcement 100a has an opening 112b. It extends in a V shape toward the upper corners of the. And the upper end side of each connection reinforcement 100a is welded to the frame part 109 and the horizontal frame part 118 via the corner reinforcement 100c attached to the upper corner part of the opening 112b.
In this rear door structure 101, the rigidity of the inner panel 106 is enhanced by arranging a pair of connection reinforcements 100a in the opening 112b.
JP-A-8-258568 (paragraphs 0010 to 0015, FIG. 1)

  However, in this rear door structure 101, a separate connection reinforcement 100a is attached to the frame portion 109 and the lateral frame portion 118 by welding, and for this attachment, the lock reinforcement 100b and the corner reinforcement 100c are used. A separate member is required. Therefore, the rear door structure 101 has a problem that the manufacturing cost increases and the weight increases. Moreover, since welding is required, there also arises a problem that the work process increases.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a rear door structure of a vehicle that has sufficient rigidity while being reduced in weight, and that can reduce work processes and manufacturing costs during manufacturing.

  The present invention for solving the above-mentioned problems is a vehicle rear door structure having an inner panel arranged on the inner side of the vehicle and an outer panel arranged on the outer side of the vehicle, and the inner panel has a shape along the outer shape of the rear door. And a pair of reinforcing portions that are integrally formed with the frame portion and extend substantially V-shaped from the lower side of the frame portion toward both side portions.

In this rear door structure, the inner panel is formed such that the pair of reinforcing portions extend substantially V-shaped from the lower side of the frame portion having a shape along the outer shape of the rear door toward both side portions. In other words, in this rear door structure, the inner panel can have a large hole as much as possible by the frame portion and the reinforcing portion, thereby reducing the weight and increasing the rigidity.
Further, in this rear door structure, since the frame portion and the reinforcing portion are integrally formed, unlike the conventional rear door structure (for example, see Patent Document 1), a plurality of reinforcements are not required, so that it is lightweight. And the manufacturing cost is reduced.
Further, unlike the conventional rear door structure (see, for example, Patent Document 1), this rear door structure eliminates the need for a plurality of reinforcements, which eliminates the need for welding and reduces the manufacturing process. .

In such a rear door structure, it is desirable that the inner panel has a surface portion that is formed smoothly and continuously from the side of the frame portion to the reinforcing portion.
In this rear door structure, since there is no bent portion where stress tends to concentrate from the side portion side of the frame portion to the reinforcing portion, and a surface portion formed smoothly and continuously is formed, the rigidity can be further increased. .

Further, in such a rear door structure, the pair of reinforcing portions are formed on the lower side of the frame portion, and are configured to extend in a substantially V shape from the lock portion to which the locking means is attached toward both side portions. May be.
In this rear door structure, the reinforcing portion extends substantially V-shaped from the lock portion, so that the rigidity is further enhanced.

Further, in such a rear door structure, it is preferable that a cut-and-raised portion protruding toward the outer panel is integrally formed on the inner panel, and the cut-and-raised portion is connected to the outer panel. .
In this rear door structure, since the cut-and-raised portion formed in the inner panel is connected to the outer panel, the rigidity can be further increased. Further, since the cut-and-raised portion is formed by being cut and raised when integrally formed, this rear door structure can easily form the cut-and-raised portion having an optimum shape at a desired position.

Further, in such a rear door structure, the first opening portion defined by the reinforcement portions and the frame portion on the upper side of the reinforcement portion, and the reinforcement portion and the lower side of one of the reinforcement portions. It is desirable that a second opening section defined by the frame section and a third opening section defined by the reinforcing section and the frame section be formed below the other reinforcing section.
In this rear door structure, by forming the first opening, the second opening, and the third opening in the inner panel, it is possible to form as large a hole as possible in the inner panel. As a result, the rear door structure can achieve weight reduction while exhibiting rigidity.

Further, in such a rear door structure, the inner panel further includes an integral lateral beam attached so as to extend between the side portions of the frame portion and the connecting portions of the reinforcing portion, You may be comprised so that it may be integrally molded by press molding.
The rear door structure is further improved in rigidity by being attached so that the transverse beam extends between the connecting portions of the frame portion and the reinforcing portion. Further, since the transverse beam is integrally formed with the frame portion and the reinforcing portion, the manufacturing process of the rear door structure (inner panel) is simplified.

Further, in such a rear door structure, the inner panel is integrally formed by press molding and attached so as to extend between the side portions of the frame portion and the connecting portions of the reinforcing portion. It is desirable to further provide a separate transverse beam.
In this rear door structure, by providing the transverse beam separately from the frame portion and the reinforcing portion, the inner panel can be easily press-molded, and the degree of freedom of press molding is increased, resulting in a larger hole. Can be secured in the inner panel.

Further, in such a rear door structure, the transverse beam is formed to be curved in an arc shape so as to protrude outward from the vehicle, and the cross-sectional shape increases from the center to both ends. It is desirable that the length gradually decreases.
In this rear door structure, the lateral beam is formed to be curved in an arc shape so as to protrude outward from the vehicle, and is formed to be curved along the outer surface of the rear door. When a heavy object such as a wiper motor is attached to the central portion of the transverse beam, a large stress is generated in the central portion. In this rear door structure, even if the size of the cross-sectional shape of the central part is increased so that a heavy object can be supported by the central part of the horizontal beam, the cross-sectional shape increases from the central part of the horizontal beam to both ends Since the size of is gradually reduced, its weight can be reduced.

In such a rear door structure, it is desirable that the lateral beam is arranged so that the extending direction substantially orthogonal to the extending direction is along the opening / closing direction of the rear door.
In this rear door structure, particularly when the rear door is closed, the transverse beam can exhibit sufficient rigidity against an applied load.

Further, in such a rear door structure, it is preferable that the attachment portions of the transverse beams in the connection portions are respectively arranged on the same plane defined in the vehicle width direction.
In this rear door structure, especially when the rear door is closed, the lateral beam can transmit the applied load evenly to each mounting portion, so that the load on the lateral beam mounting portion can be evenly distributed. .
Further, in this rear door structure, since the horizontal beam is mounted on the same plane, the alignment with the connecting portion is facilitated, and the mounting workability of the horizontal beam is improved.

  The rear door structure of the vehicle according to the present invention can reduce the weight and exhibit sufficient rigidity, and can reduce the work process and the manufacturing cost.

(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 the drawings as appropriate. In the drawings to be referred to, 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 a state in which the inner panel constituting the rear door structure according to the first embodiment is viewed from the vehicle outer side. FIG. 3 is a partial perspective view showing a state in which the state from the side of the frame portion to the reinforcing portion in the inner panel is viewed from the vehicle inner side, and is a view showing a portion indicated by an arrow C in FIG.

  As shown in FIG. 1, the rear door structure 1 a is applied to a rear door 2 that opens and closes a tailgate opening 3 of a vehicle V. Incidentally, the rear door 2 is pivoted around the hinges 4, 4 by connecting the upper edge of the rear door 2 and the upper edge of the tailgate opening 3 with a pair of hinges 4, 4. It has the structure of the formula. A locking device (not shown) is arranged at the center of the lower portion of the rear door 2, and this locking device locks the rear door 2 in the closed position to the vehicle body side.

  The rear door structure 1 a includes an outer panel 5 that is disposed outside the rear door 2 and forms an outer surface, and an inner panel 6 a that is disposed inside the outer panel 5. The rear door structure 1 a further includes a window portion 7 formed by fitting a glass plate on the upper side of the rear door 2 and a wiper 8 disposed on the lower side of the window portion 7.

As shown in FIG. 1, the inner panel 6 a includes a frame portion 9 having a shape along the outer shape of the rear door 2 and a pair of reinforcing portions 10 a and 10 b integrally formed with the frame portion (hereinafter, when the reinforcing portion is not specified). Is simply referred to as “reinforcing portion 10”.
As shown in FIG. 2, the frame portion 9 in the present embodiment is obtained by press-molding a metal plate, and is formed so that the outer contour thereof is substantially rectangular. A substantially rectangular opening is formed inside the portion 9 in plan view.
A lock attachment portion 11 to which the above-described lock device (not shown) is attached is formed at the center of the lower portion of the frame portion 9.

As shown in FIG. 2, the reinforcing portions 10 a and 10 b extend in a substantially V shape from the lower portion of the frame portion 9, specifically, from the lock attachment portion 11 side toward both side portions of the frame portion 9. Incidentally, in the present embodiment, both side portions of the frame portion 9 to which the reinforcing portions 10a and 10b are connected correspond to positions on both lower corner portions of the window portion 7 (see FIG. 1).
And the reinforcement parts 10a and 10b partition the opening formed inside the frame part 9, and are divided by the reinforcement parts 10a and 10b and the frame part 9 above the reinforcement parts 10a and 10b. A second opening 13 defined by the reinforcing portion 10a and the frame portion 9 below the one reinforcing portion 10a, and the reinforcing portion 10b and the frame portion 9 below the other reinforcing portion 10b. And a third opening 14 is formed. Incidentally, the first opening 12 in the present embodiment has a pentagonal shape in plan view, and the second opening 13 and the third opening 14 have a triangular shape.

As shown in FIG. 2, the inner panel 6a has a plurality of cut-and-raised portions 15 on the first opening 12, the second opening 13, and the third opening 14 side. The cut-and-raised portion 15 is formed so as to protrude in a direction toward the outer panel 5 (see FIG. 1), that is, a direction D toward the vehicle outer side. The cut-and-raised portion 15 is formed on the first opening 12 side so as to rise from each of the frame portion 9 and the reinforcing portions 10a and 10b so as to surround the first opening 12. The second opening 13 and the cut-and-raised portion 15 on the third opening 14 side are formed so as to rise from the frame portion 9. The tips of these cut-and-raised portions 15 are connected to the outer panel 5 (see FIG. 1).
Further, as shown in FIG. 3, the inner panel 6a has a curved surface portion 16 that is formed smoothly and continuously from the side of the frame portion 9 to the reinforcing portion 10a. The curved surface portion 16 corresponds to a “surface portion” in the claims. Further, even from the side of the frame portion 9 shown in FIG. 2 to the reinforcing portion 10b, a curved surface portion that is smoothly and continuously formed is formed in the same manner as the curved surface portion 16 shown in FIG.
Incidentally, the inner panel 6a in the rear door structure 1a according to the present embodiment is also used as the inner panel 6a in the rear door structure 1b (see FIG. 4) according to the second embodiment described later. A transverse beam attaching portion 19 to which the beam 18 (see FIG. 4) is attached is formed. The transverse beam attachment portion 19 corresponds to a “lateral beam attachment portion” in the claims. As shown in FIG. 3, the lateral beam mounting portion 19 is formed in the connecting portion 17 between the frame portion 9 and the reinforcing portion 10, and specifically, on the direction D side (the vehicle outer side) of the curved surface portion 16. It is formed to rise from the edge toward the first opening 12 side.

Next, the effect of the rear door structure 1a according to this embodiment will be described.
In the rear door structure 1a, as described above, the pair of reinforcing portions 10a and 10b extend substantially V-shaped from the lower side of the frame portion 9 shaped along the outer shape of the rear door 2 toward both side portions. By forming the inner panel 6a, a hole made of the first opening 12, the second opening 13, and the third opening 14 is formed in the inner panel 6a (see FIG. 1). That is, in the rear door structure 1a, the frame portion 9 and the reinforcing portions 10a and 10b secure as much holes as possible in the inner panel 6a to reduce the weight and increase the rigidity.

  Further, in the rear door structure 1a, the frame portion 9 and the reinforcing portions 10a and 10b are integrally formed by press molding or the like, so that a plurality of reinforcements are different from the conventional rear door structure 101 (see FIG. 7). Is not necessary, so that the weight can be reduced and the manufacturing cost can be reduced.

  Further, in this rear door structure 1a, unlike the conventional rear door structure 101 (see FIG. 7), a plurality of reinforcements are not required, so that welding is not required and the work process during manufacturing is reduced.

  Further, in the rear door structure 1a, there is no bent portion where stress is likely to concentrate from the side of the frame portion 9 to the reinforcing portions 10a and 10b, and the curved surface portion 16 is formed smoothly and continuously (see FIG. 3). As a result, the rigidity can be further increased.

  Further, in the rear door structure 1a, a cut-and-raised portion 15 formed in the inner panel 6a on the first opening 12, the second opening 13, and the third opening 14 side is connected to the outer panel 5 (see FIG. 1). Therefore, it is possible to further increase the rigidity while securing the largest possible hole in the inner panel 6a to reduce the weight. Further, the cut-and-raised portion 15 is cut and raised toward the first opening 12, the second opening 13, and the third opening 14. Therefore, in the rear door structure 1a, the first opening 12 and the second opening 13 and the third opening 14 can be formed simultaneously with the cut-and-raised portion 15, and the cut-and-raised portion 15 having an optimum shape can be easily formed at a desired position.

(Second Embodiment)
Next, a vehicle rear door structure according to a second embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the drawings to be referred to, FIG. 4 is a perspective view showing a state in which the inner panel constituting the rear door structure according to the second embodiment is viewed from the vehicle outer side. FIG. 5 is a cross-sectional view taken along the line XX of FIG. FIG. 6 is a side view of the inner panel in the second embodiment. FIG. 6 shows a state in which the hinge is attached to the inner panel, and the vehicle body to which the inner panel is attached is indicated by a virtual line. Further, the rear door structure according to the present 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. While describing an inner panel, the same code | symbol is attached | subjected about the component same as 1st Embodiment, and the detailed description is abbreviate | omitted.

As shown in FIG. 4, a lateral beam 18 is attached to the inner panel 6a so as to extend between the connecting portions 17 and 17 of the side portion of the frame portion 9 and the reinforcing portions 10a and 10b. . The lateral beam 18 is formed in an arc shape so as to be convex in the direction D toward the outside of the vehicle, and extends along the outer surface of the rear door 2 (see FIG. 1) (the outer surface of the outer panel 5 (see FIG. 1)). It will be formed to be curved. Such a transverse beam 18 is separate from the frame portion 9 and the reinforcing portions 10a and 10b. And each of the both ends of the horizontal beam attachment part 19 will be attached to the horizontal beam attachment part 19 (refer FIG. 3) by spot welding etc., for example. At this time, the transverse beam 18 is attached to the transverse beam attachment portion 19 from the outside of the vehicle. The lateral beam 18 may be attached from the inside of the vehicle. As shown in FIG. 5, the transverse beam 18 in the present embodiment gradually increases in size in cross-sectional shape from the both end portions toward the central portion. That is, the lateral beam 18 gradually increases in thickness in the direction of projecting to the vehicle outer side as it goes from both ends to the center (thinner gradually becomes thinner from the center toward both ends). A heavy object such as a motor (not shown) of the wiper 8 is attached to the central portion of the horizontal beam 18. And the horizontal beam attaching part 19 in the connection part 17 is each arrange | positioned on the same plane F prescribed | regulated in a vehicle width direction.
Further, as shown in FIG. 6, the lateral beam 18 is arranged such that the extending direction H substantially orthogonal to the extending direction G (see FIG. 5) is along the opening / closing direction J of the rear door 2.

Next, the effect of the rear door structure 1b according to this embodiment will be described.
In this rear door structure 1b, by providing the lateral beam 18 separately from the frame portion 9 and the reinforcing portions 10a and 10b, the inner panel 6a can be easily press-formed and the degree of freedom of press forming is increased. By increasing, a larger hole (first opening 12) can be secured.

  Further, in the rear door structure 1b, the transverse beam 18 is curved in an arc shape, and the size of the cross-sectional shape is gradually increased from the both end portions toward the central portion (see FIG. 5). Even if a heavy stress such as, for example, a motor (not shown) of the wiper 8 is attached to the center of the beam 18, the lateral beam 18 exhibits sufficient rigidity. In other words, since the cross-sectional shape of the transverse beam 18 gradually decreases from the central portion toward both ends, the weight of the transverse beam 18 can be reduced.

  Further, in such a rear door structure 1b, the lateral beam 18 is arranged so that the extending direction H (see FIG. 6) substantially orthogonal to the extending direction G is along the opening / closing direction J of the rear door 2. In particular, when the rear door 2 is closed, the lateral beam 18 can exhibit sufficient rigidity against the applied load.

  Further, in such a rear door structure 1b, the transverse beam mounting portions 19 and 19 (see FIG. 5) of the transverse beam 18 are respectively arranged on the same plane F (see FIG. 5) defined in the vehicle width direction. Therefore, particularly when the rear door 2 is closed, the lateral beam 18 can transmit the applied load evenly to the lateral beam mounting portions 19, 19, and the load on the lateral beam mounting portions 19, 19 is evenly distributed. Can be dispersed. Moreover, in this rear door structure 1b, since the horizontal beam 18 is mounted on the same plane F, the alignment with the connecting portion 17 is facilitated, and the mounting workability of the horizontal beam 18 is improved.

In addition, this invention is implemented in various forms, without being limited to the said embodiment.
In the first embodiment and the second embodiment, the cut-and-raised portion 15 of the inner panel 6a is formed in all of the first opening 12, the second opening 13, and the third opening 14, In the present invention, the cut-and-raised portion 15 may be formed in at least one of the first opening 12, the second opening 13, and the third opening 14.

Moreover, in the said 2nd Embodiment, although the horizontal beam 18 is attached to the inner panel 6a as a different body, this invention is not limited to this. Here, FIG. 7 is a perspective view showing a state in which an inner panel constituting a rear door structure according to another embodiment is viewed from the outside of the vehicle.
As shown in FIG. 7, in the inner panel 6b constituting the rear door structure 1c, a lateral beam 18 extending between the connecting portions 17 and 17 is integrally formed with the inner panel 6b by press molding.
In such a rear door structure 1c, since the transverse beam 18 is integrally formed with the frame portion 9 and the reinforcing portion 10 (10a, 10b), the rigidity is improved and the rear door structure 1c (inner panel 6b) is manufactured. The process is simplified.
Moreover, in the said embodiment, although the reinforcement parts 10a and 10b are extended substantially linearly, as for this invention, the reinforcement parts 10a and 10b may be curving and extended in the range which does not inhibit the objective (issue) of this invention. .

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 a fragmentary perspective view which shows a mode that the mode from the side part side of a frame part in an inner panel to a reinforcement part was seen from the vehicle inside, and is a figure which shows the location shown by the arrow C of FIG. 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 XX sectional drawing of FIG. It is a side view of the inner panel in 2nd Embodiment. It is a perspective view which shows a mode that the inner panel which comprises the rear door structure which concerns on other embodiment was seen from the vehicle outer side. It is a mimetic diagram explaining the composition of the conventional rear door structure, and is the figure seen from the back side of vehicles.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a Rear door structure 1b Rear door structure 1c Rear door structure 2 Rear door 5 Outer panel 6a Inner panel 6b Inner panel 9 Frame part 10a Reinforcement part 10b Reinforcement part 12 1st opening part 13 2nd opening part 14 3rd opening part 16 Curved surface part 17 connecting portion 18 transverse beam 19 transverse beam mounting portion V vehicle

Claims (10)

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 rear door structure for a vehicle, comprising: a pair of reinforcing portions that are integrally formed with the frame portion and that extend substantially V-shaped from the lower side of the frame portion toward both side portions.   The vehicle rear door structure according to claim 1, wherein the inner panel has a surface portion that is formed smoothly and continuously from the side of the frame portion to the reinforcing portion.   The pair of reinforcing portions are formed on a lower side of the frame portion, and extend substantially V-shaped from a lock portion to which a lock unit is attached toward both side portions. Rear door structure.   The cut-and-raised part which protrudes toward the said outer panel side is integrally formed in the said inner panel, The said raised-and-raised part is connected to the said outer panel, The Claim 1 to Claim 3 characterized by the above-mentioned. The rear door structure of the vehicle according to any one of the preceding claims. A first opening defined by the reinforcing portions and the frame portion on the upper side of the reinforcing portions;
A second opening defined by the reinforcing portion and the frame portion below the one reinforcing portion;
A third opening defined by the reinforcing portion and the frame portion below the other reinforcing portion;
The rear door structure of the vehicle according to any one of claims 1 to 4, wherein the rear door structure is formed.   The inner panel further includes an integral lateral beam attached so as to extend between the side portion of the frame portion and the connecting portion of the reinforcing portion, and is integrally formed by press molding. The rear door structure of the vehicle according to any one of claims 1 to 4.   The inner panel is integrally formed by press molding, and further includes a separate transverse beam attached so as to extend between the side portion of the frame portion and the connecting portion of the reinforcing portion. The rear door structure of the vehicle according to any one of claims 1 to 5.   The transverse beam is formed to be curved in an arc shape so as to protrude outward from the vehicle, and the size of the cross-sectional shape gradually decreases from the center to both ends. The rear door structure of a vehicle according to claim 7.   9. The rear door structure of a vehicle according to claim 7, wherein the lateral beam is disposed such that an extending direction substantially orthogonal to an extending direction thereof is along an opening / closing direction of the rear door.   10. The attachment portion according to claim 7, wherein each of the attachment portions of the transverse beam in each of the connection portions is formed on the same plane defined in the vehicle width direction. The rear door structure of the vehicle according to claim 1.

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