JP5205945B2 - Resin back door reinforcement structure - Google Patents

Description

  The present invention relates to a reinforcing structure for a resin back door, and more particularly to a technology for increasing the strength of a back door made of resin.

For example, what formed the back door of the motor vehicle with resin for the purpose of weight reduction is developed (for example, described in patent document 1 etc.).
JP-A-8-13861

  When the back door is formed of resin, the weight can be reduced as compared with the metal plate, but the resin back door is inferior to the metal back door in terms of strength. In particular, the back door is required not to be easily cracked and opened by an external input from the rear of the vehicle.

  Accordingly, an object of the present invention is to provide a reinforcing structure for a resin back door that increases the strength of the resin back door so that the back door is not cracked and opened carelessly by external input.

The resin back door reinforcing structure of the present invention is provided with a first rib and a second rib formed on the inner side of the back door at positions on both sides of the door lock body, and metal on both sides of each rib. the reinforcing plate is arranged, by and viewed clamping the first rib in the first reinforcing plate and the second reinforcing plate and the third reinforcing plate and the second rib in a second reinforcing plate are fixed by respective fastening means Nde clamping, these This is a structure in which the door lock body is surrounded by the first to third reinforcing plates in the vehicle longitudinal direction and the vehicle width direction .

According to the reinforcing structure of the resin back door of the present invention, the metal reinforcing plate is disposed on both sides of the rib formed on the resin back door inner, and the rib is disposed on both sides. Since it is sandwiched and fixed, the strength of the back door inner is improved by the reinforcing plate made of a metal having higher strength than the resin. Therefore, even when an external input is generated in the back door, the back door inner is hardly broken by the metal reinforcing plate, and the back door is prevented from being opened carelessly. Moreover, according to this invention, since the door lock main body is enclosed by the 1st-3rd reinforcement board, even if there exists a collision with respect to a back door from the vehicle back, a door lock main body can be protected. Further, since the door lock body is surrounded by these reinforcing plates, it is advantageous in terms of anti-theft .

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

  FIG. 1 shows a reinforcing structure of a resin back door according to the present embodiment, and is an enlarged perspective view of a main part showing a state in which a metal reinforcing plate is fixed to a back door inner by fastening means. FIG. FIG. 3 is a perspective view showing a state before the reinforcing plate is attached to the back door inner, and FIG. 4 is an enlarged perspective view of the reinforcing plate. FIG. 5 is a cross-sectional view of the main part in a state in which the back door outer is attached to the back door inner to which the metal reinforcing plate is attached. In FIG. 3, the arrow X indicates the vehicle width direction, the arrow Y indicates the vehicle longitudinal direction, and the arrow Z indicates the vehicle height direction.

  For example, a back door for an automobile for the purpose of weight reduction includes a resin back door inner 1 and a resin back door outer 2, and the back door inner 1 is attached to the back door outer 2. Is done. The back door outer 2 is disposed on the vehicle outer side, the back door inner 1 is disposed on the vehicle inner side, and the back door including the back door inner 1 and the back door outer 2 is provided on the vehicle rear side.

  In the present embodiment, in order to increase the rigidity of the back door, the first rib 3 and the second rib 4 among the plurality of ribs formed on the back door inner 1 are sandwiched by metal reinforcing plates on both sides. A reinforcing plate 5 and a second reinforcing plate 6; a second reinforcing plate 6 and a third reinforcing plate 7; and a bolt 8 as a fastening means sandwiching the first rib 3 and the second rib 4 with these reinforcing plates; It is fixed with a nut 9.

  Specifically, the first reinforcing plate 5 and the second reinforcing plate 6 are arranged on both sides of the first rib 3, and the first rib 3 is connected to the first reinforcing plate 5 and the second reinforcing plate 6. The bolt 8 and the nut 9 are clamped and fixed. Similarly, the second reinforcing plate 6 and the third reinforcing plate 7 are arranged on both sides of the second rib 4, and the second reinforcing plate 6 and the third reinforcing plate 7 sandwich the second rib 4 between the bolts. 8 and nut 9 are fastened and fixed. Note that the numbers of the bolts 8 and the nuts 9 are omitted in FIG.

  The 1st rib 3 and the 2nd rib 4 are each provided in the position of the both sides which pinched | interposed the door lock main body 10 attached to a back door, for example, and let it be the vertical wall formed in the vehicle height direction Z. Bolt mounting holes 11 for fixing the first reinforcing plate 5 and the second reinforcing plate 6 disposed on both sides of the first rib 3 with bolts 8 and nuts 9 are formed in the first rib 3. ing. Similarly, the second rib 4 is formed with bolt mounting holes 11 for fixing the second reinforcing plate 6 and the third reinforcing plate 7 disposed on both sides of the second rib 4 with bolts 8 and nuts 9. Has been.

  The first reinforcing plate 5 is fixed to a first standing wall 12 fixed to the first rib 3, and an inner bottom surface 1 a which is provided orthogonal to the lower end of the first standing wall 12 and which is a lower part of the back door inner 1. The bottom wall 13 and the second upright wall 14 fixed to the inner wall surface 1b of the back door inner 1 are formed, and are formed by bending and integrally forming a metal plate.

  Two fixing holes 15, 15 through which the bolts 8 are inserted are formed in the first standing wall 12 in correspondence with the bolt mounting holes 11 formed in the first rib 3. These two fixing holes 15 and 15 are respectively provided on the left and right sides of a line C that bisects the width of the first upright wall 12 in the vehicle longitudinal direction Y, and are formed as steps in the vehicle height direction Z. Yes. The fixing holes 15 are provided in the vicinity of the base of the first rib 3 (the side of the inner bottom surface 1a of the back door inner 1). Fixing holes 16 and 16 for fixing the bottom wall 13 to the inner bottom surface 1 a of the back door inner 1 with bolts 8 and nuts 9 are formed in the bottom wall 13. Bolt mounting holes 17, 17 are formed in the inner bottom surface 1 a corresponding to the fixing holes 16, 16.

  The second upright wall 14 is formed to rise vertically from one side edge of the bottom wall 13, and is fixed to the inner wall surface 1 b of the back door inner 1 with bolts 8 and nuts 9. The second standing wall 14 is formed with a fixing hole 18 for fixing the second standing wall 14 to the inner wall surface 1b of the back door inner 1 with bolts 8 and nuts 9. Bolt mounting holes 19, 19 are formed in the inner wall surface 1 b corresponding to the fixing holes 18, 18.

  A reinforcing bead 20 is formed at the intersection of the first upright wall 12 and the bottom wall 13 by being pushed upward in the vehicle height direction from the contact surface side between the first rib 3 and the inner bottom surface 1a. . Similarly, a similar reinforcing bead 21 is formed at the intersection of the bottom wall 13 and the second upright wall 14.

  The second reinforcing plate 6 is fixed to a first standing wall 22 fixed to the first rib 3 and an inner bottom surface 1 a that is provided perpendicular to the lower end of the first standing wall 22 and that is a lower part of the back door inner 1. Bottom wall 23, second standing wall 24 fixed to the inner wall surface 1b of the back door inner 1, third standing wall 25 fixed to the second rib 4, and first fixed to the back door outer 2. 4 standing walls 26, which are formed by bending and integrally forming a metal plate.

  Two fixing holes 27, 27 through which the bolt 8 is inserted are formed in the first upright wall 22 in correspondence with the bolt mounting holes 11 formed in the first rib 3. These two fixing holes 27, 27 are respectively left and right across a line that bisects the width of the first standing wall 22 in the vehicle longitudinal direction Y in the same manner as the fixing holes 15, 15 formed in the first reinforcing plate 5. It is provided as a step in the vehicle height direction Z. The fixing holes 27 and 27 are provided in the vicinity of the root of the first rib 3. The bottom wall 23 is formed with a fixing hole (not shown) for fixing the bottom wall 23 to the inner bottom surface 1 a of the back door inner 1 with bolts 8 and nuts 9. Bolt mounting holes 27 are formed in the inner bottom surface 1a of the back door inner 1 corresponding to the fixing holes.

  The second standing wall 24 is formed so as to rise vertically from one side edge of the bottom wall 23, and is fixed to the inner wall surface 1 b of the back door inner 1 with bolts 8 and nuts 9. The second standing wall 24 is formed with a fixing hole (not shown) for fixing the second standing wall 24 to the inner wall surface 1b of the back door inner 1 with bolts 8 and nuts 9. Bolt mounting holes 28 are formed in the inner wall surface 1b corresponding to these fixing holes.

  The third standing wall 25 is formed with two fixing holes 29, 29 through which the bolt 8 is inserted, corresponding to the bolt mounting holes 11 formed in the second rib 4. These two fixing holes 29, 29 are respectively left and right across a line that bisects the width of the third upright wall 25 in the vehicle longitudinal direction Y, like the fixing holes 15, 15 formed in the first reinforcing plate 5. It is provided as a step in the vehicle height direction Z. The fixing holes 29 and 29 are provided in the vicinity of the root of the second rib 4.

  The fourth upright wall 26 is formed to rise vertically from the other side edge of the bottom wall 23, and is fixed to the back door outer 2 with bolts 8 and nuts 9. The fourth standing wall 26 is formed with a fixing hole 30 for fixing the fourth standing wall 26 to the back door outer 2 with bolts 8 and nuts 9. Further, the fourth standing wall 26 is formed with a ridge 31 that protrudes toward the back door outer 3 side so as to extend in the vehicle width direction at an intermediate position in the vehicle height direction. When the fourth standing wall 26 is pulled in the vehicle height direction Z, the ridge portion 31 functions as a length adjusting portion where the curved extra length portion extends.

  And it pushes up in the vehicle height direction upward from the contact surface side of the 1st rib 3 or the 2nd rib 4, and the inner bottom face 1a in the intersection of the 1st standing wall 22 or the 3rd standing wall 25, and the bottom wall 23. A reinforcing bead (not shown) is formed. Similarly, the same reinforcing bead 21 is formed at the intersection of the bottom wall 23 and the second upright wall 24 or the fourth upright wall 26.

  The third reinforcing plate 7 is fixed to a first standing wall 32 fixed to the second rib 4 and an inner bottom surface 1 a that is provided perpendicular to the lower end of the first standing wall 32 and is a lower part of the back door inner 1. The bottom wall 33 and the second standing wall 34 fixed to the inner wall surface 1b of the back door inner 1 are formed by bending and integrally forming a metal plate.

  Two fixing holes 35, 35 through which the bolts 8 are inserted are formed in the first standing wall 32 corresponding to the bolt mounting holes 11 formed in the second rib 4. These two fixing holes 35, 35 are respectively provided on the left and right sides of a line that bisects the width of the first standing wall 32 in the vehicle front-rear direction Y, and are formed as steps in the vehicle height direction Z. . The fixing holes 35 are provided in the vicinity of the base of the second rib 4 (the side of the inner bottom surface 1a of the back door inner 1). Fixing holes 36 and 36 for fixing the bottom wall 33 to the inner bottom surface 1 a of the back door inner 1 with bolts 8 and nuts 9 are formed in the bottom wall 33. Bolt mounting holes 37, 37 are formed in the inner bottom surface 1 a corresponding to the fixing holes 36, 36.

  The second standing wall 34 is formed so as to rise vertically from one side edge of the bottom wall 33, and is fixed to the inner wall surface 1 b of the back door inner 1 with bolts 8 and nuts 9. The second upright wall 34 is formed with a fixing hole 38 for fixing the second upright wall 34 to the inner wall surface 1b of the back door inner 1 with bolts 8 and nuts 9. Bolt mounting holes 39, 39 are formed in the inner wall surface 1 b corresponding to these fixing holes 38, 38.

  A reinforcing bead (not shown) is formed at the intersection of the first upright wall 32 and the bottom wall 33 by pushing upward in the vehicle height direction from the contact surface side of the second rib 4 and the inner bottom surface 1a. Is forming. Similarly, the same reinforcing bead 21 is formed at the intersection of the bottom wall 33 and the second upright wall 34.

  As described above, in the reinforcing structure of the resin back door of the present embodiment, the metal first reinforcing plate 5 and the second reinforcing member are sandwiched between the first ribs 3 formed on the resin back door inner 1. A plate 6 is disposed, the first reinforcing plate 5 and the second reinforcing plate 6 sandwich the first rib 3 and are fixed by bolts 8 and nuts 9. Similarly, the second rib 4 is sandwiched on both sides thereof. The second reinforcing plate 6 and the third reinforcing plate 7 made of metal are disposed on the second reinforcing plate 6, and the second reinforcing plate 6 and the third reinforcing plate 7 sandwich the second rib 4, and are fixed by bolts 8 and nuts 9. Therefore, the strength of the back door inner 1 can be greatly improved by the reinforcing plate made of a metal having a higher strength than the resin. Therefore, even when external input occurs in the back door, the back door inner 1 is hardly broken by the metal reinforcing plate, and the back door can be prevented from being opened carelessly.

  Particularly in this embodiment, since the door lock main body 10 is surrounded by the first reinforcing plate 5, the second reinforcing plate 6, and the third reinforcing plate 7, the door lock main body even if there is a collision with the back door from the rear of the vehicle. 10 can be protected. Moreover, in the structure of this embodiment, since the door lock main body 10 is enclosed by these reinforcing plates 5, 6, and 7, it is advantageous also in terms of anti-theft.

  In the resin back door reinforcing structure of the present embodiment, the fixing points (bolts 8 and nuts) of the first reinforcing plate 5, the second reinforcing plate 6, and the third reinforcing plate 7 with respect to the first rib 3 or the second rib 4 are used. 9 is provided in the vicinity of the root of the first rib 3 or the second rib 4, so that the first reinforcing plate 5, the second reinforcing plate 6, and the third reinforcing plate 7 are prevented from being lifted. Can do. Thereby, it becomes a structure where the attachment site | part of the door lock main body 10 does not float easily.

  Further, in the resin back door reinforcing structure of the present embodiment, the reinforcing beads 20 are provided at the intersections of the first standing wall 12 and the bottom wall 13 of the first reinforcing plate 5. The rigidity of the plate 5 can be increased. Similarly, since the reinforcement beads 20 are also provided on the second reinforcement plate 6 and the third reinforcement plate 7, the rigidity of the second reinforcement plate 6 and the third reinforcement plate 7 can be increased.

  Moreover, in the reinforcement structure of the resin back door of this embodiment, since the 2nd reinforcement board 6 is being fixed with the volt | bolt 8 and the nut 9 with respect to the back door outer 2, the rigidity improvement of the back door outer 2 can be aimed at.

  Further, in the resin back door reinforcing structure of the present embodiment, when an external input is applied to the back door from the rear of the vehicle, a downward force on the vehicle height indicated by an arrow A in FIG. 5 acts on the back door inner 1. The upward force of the vehicle height indicated by the arrow B in FIG. At this time, since the ridges 31 are formed on the second reinforcing plate 6, the ridges 31 that are extra lengths are pulled in the vehicle height direction Z, and are respectively applied to the back door inner 1 and the back door outer 2. Absorbs the acting force to prevent the back door from breaking.

  The specific embodiment to which the present invention is applied has been described above, but the present invention is not limited to the above-described embodiment.

FIG. 1 is a main part enlarged perspective view showing a reinforcing structure of a resin back door according to the present embodiment and showing a state in which a metal reinforcing plate is fixed to a back door inner by a fastening means. FIG. 2 is an enlarged perspective view of a main part showing a state before a metal reinforcing plate is fixed to the back door inner by fastening means. FIG. 3 is a perspective view showing a state before the metal reinforcing plate is attached to the back door inner. FIG. 4 is an enlarged perspective view of the reinforcing plate. FIG. 5 is a cross-sectional view of the main part in a state in which the back door outer is attached to the back door inner to which the metal reinforcing plate is attached.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Back door inner 2 ... Back door outer 3 ... 1st rib (rib)
4. Second rib (rib)
5 ... 1st reinforcement board (reinforcement board)
6 ... Second reinforcing plate (reinforcing plate)
7 ... Third reinforcing plate (reinforcing plate)
8 ... Bolt (fastening means)
9 ... Nut (fastening means)
DESCRIPTION OF SYMBOLS 10 ... Door lock main body 12, 22, 35 ... 1st standing wall 13, 23, 36 ... Bottom wall 15 ... Fixing hole 20 ... Reinforcement bead 31 ... Projection part

Claims (3)

In the reinforcing structure of the resin back door, which is provided on the rear side of the vehicle and includes a back door outer on the vehicle outer side and a back door inner on the vehicle inner side,
A first rib and a second rib formed at the position of both sides of the door lock body to the back door inner provided, arranged metal reinforcing plate on both sides of each rib, and the first reinforcing plate by fixing the second and viewed clamping the first rib in the reinforcing plate 3 reinforcing plate and each of the fastening means Nde clamping the second rib in a second reinforcing plate, a door lock body by these first to third reinforcing plate A resin back door reinforcing structure characterized by being enclosed in a vehicle longitudinal direction and a vehicle width direction . A reinforcing structure for a resin back door according to claim 1,
The resin back door reinforcing structure, wherein a fixing point of the first to third reinforcing plates with respect to the first and second ribs is provided in a vicinity of a base portion of the ribs. A reinforcing structure for a resin back door according to claim 1 or 2,
The first to third reinforcing plates are provided perpendicular to at least a first standing wall fixed to the first and second ribs and a lower end of the first standing wall, and are fixed to a lower portion of the back door. A reinforcing structure for a resin back door, comprising: a bottom wall; and a reinforcing bead provided at an intersection of the first standing wall and the bottom wall.

Images