JP3691992B2 - Back door striker mounting body structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a body structure of a back door striker mounting portion, and more particularly to a body structure of a back door striker mounting portion in a vehicle such as an automobile.
[0002]
[Prior art]
Conventionally, as a body structure of a back door striker mounting portion of a vehicle such as an automobile, a structure as shown in FIG. 3 is known.
[0003]
As shown in FIG. 3, in the body structure of the back door striker mounting portion, an L-shaped cross member inner panel 70 disposed in the vehicle width direction and the vehicle rear side of the cross member inner panel 70 are arranged. A cross member 74 having an opening facing upward is formed by the cross member outer panel 72 disposed on the side. The upper opening of the cross member 74 is closed by a rear floor panel 76. Further, a striker reinforcement 78 having an L-shape in a side view is disposed on the inner peripheral portion of the cross member 74. The striker reinforcement 78 is formed on the lower wall portion 74A and the rear wall portion 74B of the cross member 74. It is arranged along. On the rear surface side of the rear wall portion 74B of the cross member 74, a mounting portion 80A of the strike basin 80 is fixed by a bolt 82. The bolt 82 is a vertical wall of the rear wall portion 74B of the cross member 74 and the strike reinforcement 78. The weld nut 86 is screwed into a weld nut 86 fixed to a strike retainer 84 disposed with the wall 78A interposed therebetween.
[0004]
[Problems to be solved by the invention]
However, in the body structure of the back door striker attachment portion, the lock striker 88 is fixed to the end portion 80B opposite to the attachment portion 80A in the striker base 80 bent in an L shape in a side view. As a result, the input to the lock striker 88 (relative to the arrow F in FIG. 3) has a structure in which the attachment point P1 of the striker base 80 is offset upward of the vehicle body. For this reason, due to the input to the lock striker 88, a force in the peeling direction (in the direction indicated by the arrow M in FIG. 3) acts on the attachment point P1 of the striker base 80, resulting in a disadvantageous structure. Therefore, in order to compensate for this and to improve the support rigidity of the lock striker 88, it is necessary to increase the thickness of the striker base 80, striker reinforcement 78, striker retainer 84, etc., which greatly increases cost and weight. As a related prior art, there is Japanese Utility Model Publication No. 62-22119.
[0005]
An object of the present invention is to obtain a body structure of a back door striker mounting portion capable of suppressing an increase in cost and weight and improving a support rigidity of a lock striker in consideration of the above facts.
[0006]
[Means for Solving the Problems]
The present invention according to claim 1 is a closed cross-sectional structure formed by a cross member;
A strike retainer disposed in a skewered state with respect to the closed cross-sectional structure;
A lock striker fixed to the striker retainer;
A flat plate portion formed in the strike striker and extending linearly with respect to the input direction to the lock striker ;
Formed in the flat plate portion, and a joint portion with the closed cross-sectional structure that receives an input to the lock striker in a shear direction ;
A mounting portion of the lock striker formed on the flat plate portion ;
It is characterized by having .
[0007]
Therefore, the input to the lock striker is transmitted from the lock striker to the closed cross-sectional structure via the striker retainer. At this time, the striker retainer is disposed in a skewered state with respect to the closed cross-sectional structure. A flat plate portion linearly extending with respect to the input direction of the lock striker is formed, and a joint portion with a closed cross-sectional structure that receives input to the lock striker in a shear direction and an attachment portion of the lock striker are formed on the flat plate portion. Therefore, the input to the lock striker can be received in the shear direction of the joint surface at the joint surface between the flat plate portion of the strike striker and the closed cross-sectional structure. As a result, the structure is advantageous in terms of strength, and it is possible to increase the support rigidity of the lock striker without increasing the cost and weight without increasing the thickness of the striker retainer and the members constituting the closed section structure.
[0008]
According to a second aspect of the present invention, in the body structure of the back door striker mounting portion according to the first aspect, the closed cross-sectional structure includes a cross member outer panel, a cross member inner panel, and strike strike reinforcement, and one of the flat plate portions is provided. An end portion is fixed to the inner peripheral portion of the closed cross-sectional structure, an intermediate portion of the flat plate portion is sandwiched by a joint portion between the cross member outer panel and the strike reinforcement, and the other end of the flat plate portion The lock striker is fixed to the portion.
[0009]
Therefore, in addition to the content of Claim 1, the striker retainer can be disposed in a skewered state with respect to the cross member having a closed cross-sectional structure with a simple configuration. As a result, the assembly workability is improved.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
One embodiment of the body structure of the back door striker mounting portion of the present invention will be described with reference to FIGS.
[0011]
In the figure, the arrow FR indicates the vehicle forward direction, and the arrow UP indicates the vehicle upward direction.
[0012]
As shown in FIG. 2, in the present embodiment, a cross member inner panel 10 having an L shape in side view disposed along the vehicle width direction at the rear of the vehicle body, and the cross member inner panel 10 disposed on the vehicle rear side. A cross member 14 having an opening facing upward is formed by the provided cross member outer panel 12.
[0013]
A flange 10B is formed on the upper end portion of the vertical wall portion 10A of the cross member inner panel 10 toward the front. The lower wall portion 10C of the cross member inner panel 10 is inclined obliquely downward and rearward of the vehicle, and a flange 10D is formed downward at the rear end portion. On the other hand, the cross member outer panel 12 has a flange 12B formed rearwardly at the upper end portion of the vertical wall portion 12A having a plate shape extending substantially in the vertical direction. The flange 10D of the member inner panel 10 is joined.
[0014]
The upper opening of the cross member 14 is closed by a rear floor panel 16, and the flange 10B of the cross member inner panel 10 and the flange 12B of the cross member outer panel 12 are joined to the lower surface 16A of the rear floor panel 16, respectively. A lock striker 20 is attached via a strike retainer 22 to the center of the cross member 14 in the vehicle width direction.
[0015]
As shown in FIG. 1, a flange 12D is formed at the lower end portion of the vertical wall portion 12A of the cross member outer panel 12 at the center in the vehicle width direction of the cross member 14 so as to extend obliquely rearward, and the cross member outer panel. 12, a strike reinforcement 24 is disposed below the vertical wall portion 12 </ b> A. In the strike reinforcement 24, a flange 24B is formed on the upper end portion of the vertical wall portion 24A that is formed in a plate shape extending substantially in the vertical direction, obliquely rearward and upward, and on the front surface of the lower end edge portion 24C of the vertical wall portion 24A. The flange 10D of the cross member inner panel 10 is joined.
[0016]
As shown in FIG. 2, the strike retainer 22 has a flat plate portion 22A at the center in the vehicle width direction, and triangular reinforcing portions 22B are provided on both sides in the vehicle width direction across the flat plate portion 22A. Is formed. Further, the front and rear direction center portions of the flat plate portion 22A and the reinforcing portion 22B of the striker retainer 22 are joined by the three members while being sandwiched between the flange 12D of the cross member outer panel 12 and the flange 24B of the striker reinforcement 24, respectively. Yes.
[0017]
Therefore, as shown in FIG. 1, a closed cross-section structure 29 is formed by the cross member inner panel 10, the cross member outer panel 12, the rear floor panel 16, and the strike reinforcement 24 at the center in the vehicle width direction of the cross member 14. The closed cross-section structure 29 has a structure in which the flat plate portion 22A of the striker retainer 22 is skewered. A flange 22C is formed at the front end edge of the flat plate portion 22A of the strike retainer 22.
[0018]
As shown in FIG. 2, the flange 22 </ b> C of the striker retainer 22 extends from the front end edges of the left and right reinforcing portions 22 </ b> B and has a U-shape in plan view, and the flange 22 </ b> C is the bottom of the cross member inner panel 10. It is joined to the upper surface of the wall 10C.
[0019]
As shown in FIG. 1, the lock striker 20 is fixed to the upper surface of the rear end portion of the flat plate portion 22A in the striker retainer 22 by two right and left screws 25, and these screws 25 are connected to the back surface of the flat plate portion 22A. The threaded portion 30A of the strike cassette retainer 30 disposed on the (lower surface) side is screwed.
[0020]
A known latch member 40 indicated by a two-dot chain line is disposed on the door inner panel 32 </ b> A side of the back door 32. The latch member 40 engages with the lock striker 20 as the back door 32 is closed and rotated. It is supposed to be. Further, the input at this time acts in the direction of arrow F in FIG. 1, and the flat plate portion 22A of the striker retainer 22 is linear with respect to the input direction of the lock striker 20 (the direction of arrow F in FIG. 1). It is extended to.
[0021]
1, reference numeral 42 denotes a finish blade, reference numeral 44 denotes a floor mat, reference numeral 46 denotes a clip, reference numeral 48 denotes a resin bumper, reference numeral 50 denotes a door trim, reference numeral 52 denotes a weather strip, and reference numeral 54 denotes a reinforcement. Is shown.
[0022]
Next, the operation of this embodiment will be described.
[0023]
In this embodiment, the input to the lock striker 20 is transmitted from the lock striker 20 to the closed cross-sectional structure 29 via the striker retainer 22. At this time, the striker retainer 22 is skewered with respect to the closed cross-sectional structure 29. The striker retainer 22 has a flat plate portion 22A extending linearly with respect to the input direction to the lock striker 20 (the direction of arrow F in FIG. 1), and the flat plate portion 22A is joined to the cross member 14. And a mounting portion of the lock striker 20 are formed. That is, the three members are joined in a state where the center portion of the flat plate portion 22A in the striker retainer 22 is sandwiched between the flange 12D of the cross member outer panel 12 and the flange 24B of the striker reinforcement 24, and the flange of the striker retainer 22 is joined. 22C is joined to the upper surface of the lower wall portion 10C of the cross member inner panel 10, and the lock striker 20 is fixed to the rear end portion of the flat plate portion 22A of the striker retainer 22.
[0024]
As a result, the input to the lock striker 20 can be received in the shearing direction of the joint surface at the joint surface between the flat plate portion 22A of the striker retainer 22 and the flange 12D of the cross member outer panel 12 and the flange 24B of the striker reinforcement 24. At the same time, the joint surface between the flange 22C of the strike retainer 22 and the lower wall portion 10C of the cross member inner panel 10 can be received in the shear direction of the substantially joint surface. As a result, the structure is advantageous in terms of strength, and without increasing the thickness of the cross member outer panel 12, strike strike reinforcement 24, etc. constituting the strike retainer 22 and the closed cross section 29, that is, suppressing an increase in cost and weight. In addition, the support rigidity of the lock striker 20 can be improved.
[0025]
Further, in the present embodiment, the three members are joined in a state where the central portion of the flat plate portion 22A in the striker retainer 22 is sandwiched between the flange 12D of the cross member outer panel 12 and the flange 24B of the striker reinforcement 24, and the striker retainer is joined. Since the 22 flanges 22C are joined to the upper surface of the lower wall portion 10C of the cross member inner panel 10, the striker retainer 22 can be arranged in a skewered state with respect to the closed sectional structure 29 with a simple configuration. As a result, the assembly workability is improved.
[0026]
In addition, since the member corresponding to the strike reinforcement 78 in the conventional structure shown in FIG. 3 can be eliminated, the bolt 82 and the weld nut 86 can also be eliminated. Attachment workability can be improved.
[0027]
Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art. For example, the member forming the closed cross-sectional structure 29 and the cross-sectional shape thereof are not limited to the present embodiment. Further, in this embodiment, the triangular reinforcing portions 22B are formed on both sides in the vehicle width direction with the flat plate portion 22A of the striker retainer 22 interposed therebetween, but the shape of the striker retainer 22 is not limited to this and may be other shapes. The flat plate portion 22 </ b> A alone may not have the reinforcing portion 22 </ b> B.
[0028]
【The invention's effect】
According to the first aspect of the present invention, there is provided a closed cross-sectional structure formed by a cross member, a striker retainer disposed in a skewed state with respect to the closed cross-sectional structure, a lock striker fixed to the striker retainer , and a striker retainer . A flat plate portion that is formed and extends linearly with respect to the input direction to the lock striker, and a flat plate portion that is formed on the flat plate portion and receives the input to the lock striker in the shear direction, and formed on the flat plate portion. because having a mounting portion of the lock striker has, has an excellent effect of and suppressing an increase in cost and weight can improve the support rigidity of the lock striker.
[0029]
According to a second aspect of the present invention, in the body structure of the back door striker mounting portion according to the first aspect, the closed cross-sectional structure includes a cross member outer panel and a cross member inner panel, and one end of the flat plate portion is a closed cross section. It is fixed to the inner peripheral part of the structure, the middle part of the flat plate part is sandwiched by the joint part between the cross member outer panel and the cross member inner panel, and the lock striker is fixed to the other end part of the flat plate part Therefore, in addition to the effect of the first aspect, the structure is simplified and the assemblability is improved.
[Brief description of the drawings]
FIG. 1 is an enlarged cross-sectional view taken along line 1-1 of FIG.
FIG. 2 is a perspective view showing the body structure of the back door striker mounting portion according to the embodiment of the present invention as seen from the obliquely rearward side of the vehicle.
FIG. 3 is a side sectional view showing a body structure of a conventional back door striker mounting portion.
[Explanation of symbols]
10 Cross member inner panel 10C Lower wall portion 12 of cross member inner panel 12 Cross member outer panel 12D Flange 14 of cross member outer panel Cross member 16 Rear floor panel 20 Lock striker 22 Strike retainer 22A Strike retainer flat plate portion 22C Strike retainer flange 24 Strike reinforcement 24B Strike reinforcement flange 29 Closed section structure 30 Strike cassette retainer

Claims (2)

A closed cross-sectional structure formed by a cross member;
A strike retainer disposed in a skewered state with respect to the closed cross-sectional structure;
A lock striker fixed to the striker retainer;
A flat plate portion formed in the strike striker and extending linearly with respect to the input direction to the lock striker ;
Formed in the flat plate portion, and a joint portion with the closed cross-sectional structure that receives an input to the lock striker in a shear direction ;
A mounting portion of the lock striker formed on the flat plate portion ;
The body structure of the back door striker attachment part characterized by having .   The closed cross-sectional structure includes a cross member outer panel, a cross member inner panel, and strike reinforcement, and one end of the flat plate portion is fixed to an inner peripheral portion of the closed cross sectional structure, and an intermediate portion of the flat plate portion is 2. The back door striker according to claim 1, wherein the back striker is sandwiched between joint portions of the cross member outer panel and the strike reinforcement, and the lock striker is fixed to the other end portion of the flat plate portion. Body structure of the mounting part.

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