JP2010274688A - Automobile back door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automobile back door effectively suppressing a noise by efficiently improving the rigidity of the back door by using a reinforcement plate. <P>SOLUTION: A width-direction inner wall 22 of the reinforcement plate 12 and a part of an inner panel 5 overlapped with the width-direction inner wall 22 are fixed by first spot welding S1. A top wall 23 of the reinforcement plate 12 and the part of the inner panel 5 overlapping the top wall are fixed by second spot welding S2. A width-direction outer wall 21 of the reinforcement plate 12 and the part of the inner panel 5 overlapping the width-direction outer wall are fixed by third spot welding S3. The positions of the spot welding S1 to S3 are on the bottom wall 15 of a trim attachment portion 14 formed in the inner panel 5. A portion 13A extending in the vertical direction of a window opening peripheral sloped portion 13 and a second sloped wall 25 of the reinforcement plate 12 are vertically and continuously extended. A bottom wall sloped portion 27 connected to the second sloped wall 25 and sloped in the same direction is formed on the bottom wall 15 of the trim attachment portion 14. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a back door of an automobile supported by a vehicle body so as to be capable of rotating and opening between a closed position where a door opening at the rear of the vehicle body is closed and an open position where the door opening is opened.

  The back door described above is generally attached to the outer panel in a state of covering an outer panel, an inner panel fixed to the outer panel and positioned on the inner side of the outer panel, and a window opening formed in the inner panel and the outer panel. It has a fixed window glass and a door trim fixed to the inner surface of the inner panel. When a car having such a back door travels, the back door vibrates in the front-rear direction with a minute amplitude while the back door portion slightly below the window opening is bent by an external force acting on the back door, This may cause a loud noise.

  Therefore, in the conventional back door, the rigidity of the back door is fixed by fixing the reinforcing plate on the inner panel vehicle inner surface in the vicinity of each lower corner portion of the window opening formed in the inner panel so as to overlap the inner panel. This controlled the back door and suppressed the generation of noise. However, the back door cannot be damped efficiently by simply fixing the reinforcing plate to the inner panel.

  In addition, in order to improve the rigidity of the door of a motor vehicle, providing the reinforcement plate (reinforcement) in the door is described in the following patent document 1, for example.

JP 2002-29259 A

  The present invention has been made on the basis of the above-described recognition, and an object of the present invention is to provide a vehicle back that can efficiently increase the rigidity of the back door and effectively suppress the generation of noise by the reinforcing plate. To provide a door.

  The present invention is a back door that is supported by a vehicle body so as to be able to pivot open and close between a closed position in which a door opening at the rear of the vehicle body is closed and an open position in which the door opening is opened, and the outer panel and the outer panel An inner panel that is fixed and located on the inner side of the outer panel, a window glass that is fixed to the outer panel in a state of covering a window opening formed in the inner panel and the outer panel, and an inner side surface of the inner panel A fixed door trim; and a reinforcing plate fixedly disposed on the inner panel vehicle outer surface in the vicinity of the lower corner portion of the window opening formed in the inner panel so as to overlap the inner panel. The panel extends along a window opening formed in the inner panel, and the window opening is inclined so as to expand from the side of the window opening toward the front. A trim mounting portion is formed in the inner panel portion below the window opening, and the trim mounting portion is trimmed from the bottom wall recessed toward the rear and the outer periphery of the bottom wall. It is composed of a trim mounting inclined wall that is inclined in a state of being spread forward toward the outer periphery of the mounting portion, and the door trim has the outer periphery substantially coinciding with the outer periphery of the trim mounting portion. The reinforcing plate includes a width direction outer wall, a width direction inner wall located closer to the back door width direction center than the width direction outer wall, and the width direction outer wall and the width direction inner wall. A top wall located at the rear, a first inclined wall integrally connecting the top wall and the widthwise inner wall, and a second inclined wall integrally connecting the top wall and the widthwise outer wall; And the first and second inclined walls are opened forward. The inner wall portion in the width direction of the reinforcing plate and the inner panel portion overlapping the inner wall in the width direction are fixed by first spot welding so as to overlap the top wall of the reinforcing plate and the top wall. The inner panel portion is fixed by second spot welding, and the outer wall in the width direction of the reinforcing plate and the inner panel portion overlapping the outer wall in the width direction are fixed by third spot welding. The third spot weld is located on the bottom wall of the trim mounting portion formed on the inner panel, and extends substantially vertically in the inclined portion around the window opening, and the second inclined wall of the reinforcing plate And the bottom wall of the trim mounting portion formed on the inner panel extends substantially downwardly continuously to the second inclined wall, and the second Same as inclined wall A back door of an automobile in which a bottom wall inclined portion inclined in the same direction is formed is proposed.

  ADVANTAGE OF THE INVENTION According to this invention, without reducing the appearance of a back door, the rigidity of a back door can be improved efficiently and the damping effect of the back door at the time of a motor vehicle drive can be improved.

It is the figure which looked at the motor vehicle which has a back door from back. It is a figure similar to FIG. 1 which shows a mode when a back door has occupied the open position. It is the schematic which looked at the inner panel and the reinforcement plate fixed to this from the back in the state which removed the outer panel, the window glass, and the door trim. FIG. 4 is a detailed enlarged view of a portion indicated by an arrow IV in FIG. 3. Sectional drawing which cut | disconnected the back door in which all the outer panels, the window glass, and the door trim were assembled | attached along the V1-V1, V2-V2, V3-V3, and V4-V4 lines of FIG. It is. It is a figure explaining the process until it reaches the structure of the back door of this example. It is a figure explaining the process until it reaches the structure of the back door of this example. It is a figure explaining the process until it reaches the structure of the back door of this example. It is a figure explaining the process until it reaches the structure of the back door of this example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings, and the background to the adoption of the configuration according to the present invention will be clarified.

  FIG. 1 is a view of an automobile having a back door 1 according to the present invention as seen from the rear, and FIG. 2 is a view of the situation when the back door 1 occupies an open position as seen from the rear of the automobile. As can be seen from FIGS. 1 and 2, the back door 1 has a closed position shown in FIG. 1 in which the door opening 2 (FIG. 2) at the rear of the vehicle body is closed, and an opening shown in FIG. The vehicle body 3 is supported so as to be able to open and close between the positions. In the illustrated example, the upper portion of the back door 1 is supported on the vehicle body 3 so as to be able to be opened and closed via a hinge (not shown), but the widthwise side portion of the back door 1 is attached to the vehicle body 3 via the hinge. It can also be supported so that it can be rotated and opened.

  The arrow Fr in the figure indicates the forward direction of the automobile, and the arrow W indicates the vehicle width direction orthogonal to the forward direction Fr or the width direction of the back door 1. The terms “front” or “rear” in the present specification and claims mean front and rear with respect to the forward direction of the automobile, and also identify each part of the back door in the present specification and claims. All the descriptions to do are descriptions in a state where the back door 1 occupies the closed position shown in FIG. For example, the front part of the back door 1 means the front part of the back door in a state where the back door 1 occupies the closed position, and the surface of the back door 1 on the vehicle interior side means that the back door 1 is in the closed position. It means the inner surface of the back door in the occupied state.

  As shown in FIGS. 1 and 2, the back door 1 has an outer panel 4 and an inner panel 5 that is fixed to the outer panel 4 and that is positioned on the inner side of the outer panel 4 with the back door 1 closed. ing. FIG. 3 is a view in which only the inner panel 5 and a reinforcing plate, which will be described later, are taken out from each element of the back door 1 and viewed from the rear side of the automobile. FIG. 4 is indicated by an arrow IV in FIG. FIG. 5 (a), 5 (b), 5 (c) and 5 (d) show the back door provided with all the elements such as the outer panel and a door trim, which will be described later, with the V1-V1 line and the V2-V2 line in FIG. FIG. 5 is a cross-sectional view taken along lines V3-V3 and V4-V4, respectively.

  As shown in FIGS. 1 to 4 and FIGS. 5 (a) and 5 (b), the inner panel 5 and the outer panel 4 are respectively formed with window openings 6 and 7 aligned with each other. Covered by the window glass 8. As shown in FIGS. 5A and 5B, the window glass 8 is fixed to the outer surface of the outer panel 4 with an adhesive (not shown). Thus, the back door 1 has the window glass 8 fixed to the outer panel 4 in a state of covering the window openings 6 and 7 formed in the inner panel 5 and the outer panel 4.

  Further, as shown in FIGS. 2 and 5 (b), (c), and (d), a door trim 9 is fixed to the inner side surface of the inner panel 5. As shown in FIG. 3, the inner panel 5 has a working hole 10, which is covered with a door trim 9 not shown in FIG. 3. The door trim 9 is made of, for example, resin, and the outer panel 4 and the inner panel 5 are made of, for example, a highly rigid material such as a steel plate.

  As described above, when the back door 1 is closed as shown in FIG. 1 and the vehicle is driven, the back door portion slightly below the window openings 6 and 7 due to the external force acting on the back door 1. While the portion of X (FIG. 1) is bent, the back door 1 may vibrate in the front-rear direction, and there is a possibility that a large noise is generated. Therefore, in the back door 1 of this example, as shown in FIGS. 3, 4, and 5 (c), the inner portion near the lower corner portions 11, 11 of the window opening 6 formed in the inner panel 5. Reinforcing plates 12 and 12 are fixedly arranged on the outer surface of the panel wheel so as to overlap the inner panel 5. Similar to the outer panel 4 and the inner panel 5, the reinforcing plates 12 and 12 are also made of a highly rigid plate material such as a steel plate.

  Each reinforcing plate 12, 12 may extend to the inner panel portion in the vicinity of the upper corner portion 30 (FIG. 3) of the window opening 6. The reinforcing plates 12 and 12 are members that are fixedly disposed at least on the outer surface of the inner panel vehicle near the lower corners 11 and 11 of the window opening 6 formed in the inner panel 5.

  As described above, by fixing the reinforcing plates 12 and 12 to the inner panel 5, it is possible to increase the rigidity of the back door 1 and to suppress the generation of noise. However, the effect cannot be enhanced by simply fixing the reinforcing plates 12 and 12 to the inner panel 5. Therefore, in order to maximize the effect of providing the reinforcing plates 12, 12, the back door 1 of this example employs the configuration described below.

  1 and 3 indicate the center in the width direction of the back door 1, and the back door 1 of this example includes a right side portion RH and a left side portion of the width direction center CL. LH is configured symmetrically. Therefore, in the following description, only the configuration of the right portion RH of the back door 1 will be clarified.

  As shown in FIGS. 3, 4, and 5 (a) and 5 (b), the inner panel 5 has a window opening peripheral inclined portion 13 extending along the window opening 6 formed in the inner panel 5. Is formed. As is apparent from FIGS. 5A and 5B, the window opening peripheral inclined portion 13 is inclined so as to expand from the window opening 6 side toward the front. The window opening peripheral inclined portion 13 extends so as to surround the window opening 6 over the entire circumference.

  On the other hand, as shown in FIGS. 3, 4, and 5 (b), (c), and (d), the trim mounting portion 14 that is recessed rearward is formed in the inner panel portion below the window opening 6. The trim mounting portion 14 is inclined so as to expand toward the front from the outer wall 16 of the bottom wall 15 to the outer periphery 17 of the trim mounting portion 14. And a trim mounting inclined wall 18. The trim mounting inclined wall 18 extends so as to surround the bottom wall 15.

  As shown in FIGS. 2 and 5 (b), (c), and (d), the door trim 9 described above has its trim 19 mounted in a state where its outer periphery 19 substantially coincides with the outer periphery 17 of the trim mount 14. Covers the part 14. By forming the trim mounting portion 14 on the inner panel 5, when manufacturing the back door 1, an operator can easily remove the door trim 9 with a clip or the like (not shown) on the basis of the trim mounting portion 14. Can be attached to the panel 5. Thus, the trim attaching part 14 can improve workability | operativity at the time of door trim attachment.

  On the other hand, as shown in FIG. 4 and FIG. 5C, the reinforcing plate 12 has a hat-shaped cross-sectional shape, and is wider than the width-direction outer wall 21 and the width-direction outer wall 21. The width direction inner side wall 22 located on the side of the back door width direction center CL shown in FIG. 2, the top wall 23 located behind the aforementioned width direction outer side wall 21 and the width direction inner side wall 22, and the top wall 23 The first inclined wall 24 integrally connecting the widthwise inner side wall 22 and the second inclined wall 25 integrally connecting the top wall 23 and the widthwise outer side wall 21 are integrally formed. The width direction outer side wall 21 is located outside the width direction inner side wall 22 in the vehicle width direction W or the width direction of the back door 1. Moreover, the 1st and 2nd inclination walls 24 and 25 incline in the state expanded toward the front.

  As is well known, the outer panel 4 and the inner panel 5 are integrated by spot welding and peripheral hemming. However, the reinforcing plate 12 is also fixed to the inner panel 5 by spot welding as follows. ing.

  The crosses marked with reference signs S1 to S3 in FIG. 4 and FIG. 5C schematically indicate spot-welded locations. As can be seen, the inner wall 22 in the width direction of the reinforcing plate 12 and the inner panel portion overlapping the inner wall 22 in the width direction are fixed by the first spot welding S1, and the top wall 23 of the reinforcing plate 12 and the top wall 23 thereof are fixed. The inner panel portion overlapped with the wall 23 is fixed by the second spot welding S2, and the width direction outer wall 21 of the reinforcing plate 12 and the inner panel portion overlapped with the width direction outer wall 21 are the third spot. It is fixed by welding S3.

  As described above, the reinforcing plate 12 is formed in a hat cross-sectional shape including the width direction outer side wall 21, the width direction inner side wall 22, and the top wall 23, and the reinforcing plate 12 is fixed to the inner panel 4 in an overlapping manner. These rigidity becomes very large, and the rigidity of the back door 1 can be effectively increased. Moreover, the outer wall 21 in the width direction, the inner wall 22 and the top wall 23 in the width direction of the reinforcing plate 12, and the inner panel portions overlapping the respective wall portions 21, 22, 23 are respectively first to third spot welds S1. , S2 and S3, the rigidity of the reinforcing plate 12 and the inner panel portion overlapped with the reinforcing plate 12 can be further increased, and the vibration of the back door 1 can be effectively suppressed when the vehicle is running, Noise generation can be reliably reduced.

  Further, the locations of the first to third spot welds S1 to S3, that is, the spot welding points of the respective spot welds, are the trims formed on the inner panel 5 as apparent from FIG. 4 and FIG. It is located on the bottom wall 15 of the mounting portion 14. For this reason, the hit points of the first to third spot welds S1 to S3 are covered and hidden by the door trim 9, and the hit points of the spot welds S1 to S3 are not visually observed from the vehicle interior. For this reason, the appearance of the passenger compartment does not deteriorate.

  By the way, in order to improve the sealing performance in the vehicle compartment when the back door 1 is closed as shown in FIG. When the constructed weather strip 26 is attached and the back door 1 is closed, a portion called a weather line WL extending on the inner side surface of the inner panel 5 shown in FIGS. 3 and 4 presses against the weather strip 26. . The weather line WL naturally extends outside the door trim 9 or the trim mounting portion 14 thereof. On the other hand, as described above, the locations of the first to third spot welds S1 to S3, that is, the spot welding points of the respective spot welds, as can be seen from FIG. 4 and FIG. Is located on the bottom wall 15. Accordingly, the spot welding points of the spot welds S1 to S3 are not positioned on the weather line WL. For this reason, the sealing performance in the vehicle interior when the back door 1 is closed is kept high. If the hit points of the spot welds S1 to S3 are located on the weather line WL, the surface of the hit point portion is not smooth, and even if this portion is pressed against the weather strip 26, the sealing performance is lowered. I can't escape.

  Further, in FIG. 4, the portion 13 </ b> A extending substantially in the vertical direction of the above-described window opening peripheral inclined portion 13 is indicated by hatching for easy understanding of the drawing. Similarly, in order to make the drawing easy to understand, the second inclined wall 25 of the reinforcing plate 12 is given a diagonal line opposite to the above-described diagonal line. As can be seen from FIG. 4, the portion 13 </ b> A extending in the substantially vertical direction of the window opening peripheral inclined portion 13 and the second inclined wall 25 of the reinforcing plate 12 extend substantially continuously in the vertical direction. 4 and 5 (d), the bottom wall 15 of the trim mounting portion formed on the inner panel 5 extends substantially downward continuously from the second inclined wall 25, and A bottom wall inclined portion 27 that is inclined in the same direction as the second inclined wall 25 is formed. In FIG. 4, the bottom wall inclined portion 27 is provided with a double oblique line for easy understanding of the drawing. As shown in FIG. 3, the bottom wall inclined portion 27 extends downward, extends horizontally, and then extends obliquely upward.

  As described above, the portion 13A of the window opening peripheral inclined portion 13 extending in the substantially vertical direction, the second inclined wall 25, and the entire bottom wall inclined portion 27 are connected in this order, and the whole is substantially continuous in the vertical direction. Therefore, the rigidity of the reinforcing plate 12 and the inner panel portion in the vicinity thereof is particularly increased, and the generation of noise during vehicle travel can be further effectively suppressed. The rigidity of the back door 1 is most effectively increased by continuing the portion 13A of the window opening peripheral inclined portion 13 extending substantially in the vertical direction, the second inclined wall 25, and the bottom wall inclined portion 27, and the reinforcing plate 12 This function can be maximized.

  On the other hand, FIGS. 6 to 9 are diagrams clarifying the process until the present invention is completed in order to clarify the advantages of the back door of the present example. 6A to 9A are views showing only the inner panel or only the inner panel and the reinforcing plate from the rear as in FIG. 3, and FIGS. 6B to 9B are views showing the inner panel. FIG. 10 is a cross-sectional view taken along lines VI-VI, VII-VII, VIII-VIII, and IX-IX in FIG. 6A to FIG. 9A in a state where the outer panel and the door trim are assembled.

  FIG. 6A shows the inner panel 5 of the back door 1 on which no reinforcing plate is provided. Since the back door 1 shown here does not have a reinforcing plate, its rigidity is low, and the back door 1 vibrates violently during driving of the automobile, and there is a risk of generating a loud noise. 6, reference numeral 6 denotes a window opening formed in the inner panel 5, reference numeral 4 denotes an outer panel, reference numeral 9 denotes a door trim, and reference numeral 14 denotes a trim mounting portion. The same applies to FIGS. 7 to 9.

  7A and 7B show that the reinforcing plate 12 is formed on the inner panel portion near the corner portion 11 of the window opening 6 formed in the inner panel 5 by the first and second spot welds S1 and S2. The conventional example of the back door 1 to which is fixed is shown. Since the reinforcing plate 12 shown here partially overlaps the weather line WL of the inner panel 5, the third spot welding cannot be performed here, and the first and second spot weldings S <b> 1 and S <b> 2 are performed. Only the reinforcing plate 12 is fixed to the inner panel 5. For this reason, although the reinforcing plate 12 is provided, the rigidity of the back door 1 cannot be sufficiently increased, and there is an unavoidable risk that the back door 1 will vibrate and emit a loud noise when the vehicle is traveling.

  FIGS. 8A and 8B show an example in which the reinforcing plate 12 is fixed to the inner panel 5 by the first to third spot weldings S1, S2, and S3. In the back door 1 shown here, since the reinforcing plate 12 is fixed to the inner panel 5 by the first to third spot welds S1 to S3, it is expected to increase the rigidity of the back door 1 in this respect. In addition, since the hit points of the first to third spot welds S1 to S3 are located on the bottom wall 15 of the trim mounting portion 14, the hit points can be covered by the door trim 9. However, in the back door 1 shown in FIG. 8, the portion 13 </ b> A extending substantially vertically of the window opening peripheral inclined portion 13 and the second inclined wall 25 of the reinforcing plate 12 extend continuously. The inclined wall 18 is not continuous with the second inclined wall 25. For this reason, even if the reinforcing plate 12 is provided, the rigidity cannot be increased so much.

  Further, FIGS. 9A and 9B also show the back door 1 in which the reinforcing plate 12 is fixed to the inner panel 5 by the first to third spot welds S1, S2, and S3. In the back door 1 shown here, the portion 13A of the window opening peripheral inclined portion 13 that extends substantially in the vertical direction, the second inclined wall 25 of the reinforcing plate 12, and the trim mounting inclined wall 18 extend continuously. Since the hit points of the first to third spot welds S1, S2, and S3 for fixing the reinforcing plate 12 to the inner panel 5 are not located on the weather line WL, the sealing performance by the weather strip is not deteriorated. However, in the back door 1 shown here, since the third spot weld S3 is located outside the trim mounting portion 14, the dent of the spot weld S3 can be seen from the passenger compartment, and its appearance is good. Is unavoidable the disadvantages that decline.

  According to the back door of this example described above, all of the above-mentioned drawbacks of the back doors shown in FIGS. 6 to 9 can be avoided.

DESCRIPTION OF SYMBOLS 1 Back door 2 Door opening 3 Car body 4 Outer panel 5 Inner panel 6,7 Window opening 8 Window glass 9 Door trim 11 Corner part 12 Reinforcement plate 13 Window opening periphery inclination part 13A The part extended to an up-down direction 14 Trim attachment part 15 Bottom wall 16, 17, 19 outer periphery 18 trim mounting inclined wall 21 width direction outer wall 22 width direction inner wall 23 top wall 24 first inclined wall 25 second inclined wall 27 bottom wall inclined portion CL center S1 first spot welding S2 second Spot welding S3 Third spot welding

Claims (1)

  A back door that is supported by the vehicle body so as to be able to open and close between a closed position in which the door opening at the rear of the vehicle body is closed and an open position in which the door opening is opened, the outer panel being fixed to the outer panel, and An inner panel positioned on the inner side of the outer panel, a window glass fixed to the outer panel in a state of covering a window opening formed in the inner panel and the outer panel, and a door trim fixed to the inner side surface of the inner panel And an inner panel vehicle outer surface in the vicinity of the lower corner portion of the window opening formed in the inner panel, and a reinforcing plate fixedly arranged in a state of overlapping the inner panel, the inner panel includes: Inclined around the window opening that extends along the window opening formed in the inner panel and inclines forward from the side of the window opening. And a trim mounting portion is formed in the inner panel portion below the window opening. The trim mounting portion includes a bottom wall that is recessed rearward and an outer periphery of the bottom wall. It consists of a trim mounting inclined wall that is inclined in a state of being spread forward toward the outer periphery, and the door trim covers the trim mounting portion with its outer periphery substantially coinciding with the outer periphery of the trim mounting portion. The reinforcing plate is positioned on the outer side wall in the width direction, on the inner side wall in the width direction on the back door width direction side of the outer wall in the width direction, and on the rear side of the outer wall in the width direction and the inner wall in the width direction. A first inclined wall that integrally connects the top wall and the inner wall in the width direction, and a second inclined wall that integrally connects the top wall and the outer wall in the width direction, The first and second inclined walls are expanded toward the front. An inner panel that is inclined and has an inner panel that overlaps the inner wall of the reinforcing plate and the inner panel that overlaps the inner wall of the width by first spot welding. The portion is fixed by the second spot welding, and the width direction outer wall of the reinforcing plate and the inner panel portion overlapping the width direction outer wall are fixed by the third spot welding, and the first to third portions are fixed. The spot welded portion is located on the bottom wall of the trim mounting portion formed on the inner panel, and a portion extending in the substantially vertical direction of the inclined portion around the window opening, and the second inclined wall of the reinforcing plate, The bottom wall of the trim mounting portion formed on the inner panel extends substantially downward continuously from the second inclined wall, and extends substantially vertically. Tilt in the same direction An automobile back door with a slanted bottom wall slope.

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