JP4736639B2 - Car body rear structure - Google Patents

Description

  The present invention relates to a vehicle body rear structure at an upper portion of a back door opening.

  As a conventional vehicle body rear structure at the upper part of a conventional back door opening, one disclosed in Patent Document 1 is known.

  In the vehicle body rear structure disclosed in Patent Document 1, a rail member extends in the vehicle width direction at the upper edge of the back door opening.

  In addition, the flanges of the side panel and the inner panel are joined together to form a closed cross section at the upper and rear end of the vehicle body side, and a reinforcing member (reinforce) is provided in the closed cross section. ing.

  And the vehicle width direction edge part of a rail member and the reinforcement member (and inner panel) are connected.

With such a structure, the rigidity of the corner portion at the upper part of the back door opening can be enhanced by a relatively lightweight structure. Such a structure is applied, for example, to a vehicle body rear structure such as a wagon car.
JP 2000-335443 A

  By the way, in the above-described conventional vehicle body rear structure, another member (hereinafter referred to as a rear roof rail upper panel) extending in the vehicle width direction is provided on the rail member, and the two members of the rail member and the rear roof rail upper panel are used. In some cases, a rear roof rail having a closed cross section is formed (in this case, the rail member can be referred to as a rear roof rail lower panel).

  In this case, the end portion in the vehicle width direction of the rear roof rail upper panel is connected to the upper wall portion of the reinforcing member.

  Here, the rear end portion and the side end portion of the roof panel are fixed to the upper wall portion and the side panel of the reinforcing member. However, in the configuration in which the rear roof rail upper panel is provided, the rear end portion and the side end of the roof panel are provided. The position where the portion is fixed to the upper wall portion and the side panel of the reinforcing member and the position where the end portion in the vehicle width direction of the rear roof rail upper panel is connected to the upper wall portion of the reinforcing member are arranged close to each other. There are many cases.

  Then, when a large bending force is applied to the rear roof rail or the rear pillar connected to the rear roof rail, the position in the vehicle width direction end of the rear roof rail upper panel is connected to the upper wall of the reinforcing member, and thus the roof panel There is a problem in that the stress at the position where the rear end portion and the side end portion are fixed to the upper wall portion and the side panel of the reinforcing member is increased, and the roof panel is easily detached.

  Therefore, an object of the present invention is to obtain a vehicle body rear structure in which a roof panel is more difficult to come off.

In the present invention, a rear roof rail lower panel that extends in the vehicle width direction at the upper edge of the back door opening, and a rear roof rail upper panel that is disposed adjacent to the upper side of the rear roof rail lower panel along the rear roof rail lower panel. And a body side inner panel and a body side outer that are joined to each other to form a closed cross section at least at the upper part and the rear end of the vehicle body side part, and a connection position between the rear roof rail upper panel and the body side outer Is set to the inner side in the vehicle width direction from the fixed position for fixing the rear end portion and the side end portion of the roof panel to the body side outer, and the vehicle is set from the connection position between the rear roof rail upper panel and the body side outer. Vehicle width of the body side inner panel and the body side outer on the inner side in the width direction With the inner end portions are connected, said body side inner panel and closed plane formed by the body side outer, vehicle width direction outer side from the connection position between the body side outer and the rear roof rail upper panel and, The main feature is that a reinforcement for reinforcing the closed cross section is provided at a position on the inner side in the vehicle width direction from a fixing position for fixing a rear end portion and a side end portion of the roof panel to the body side outer. .

According to the present invention, the connection position between the rear roof rail upper panel and the body side outer is set on the inner side in the vehicle width direction from the fixing position for fixing the roof panel to the body side outer, and the connection position and the fixing position are set. Even if the stress at the connection position increases due to the bending force generated on the rear roof rail upper panel or the rear pillar connected to the rear roof rail because of the separation, the roof panel is prevented from coming off the body side outer. Can do.
According to the present invention, the body side inner panel and the body side inner end of the body side drain force are joined to each other on the inner side in the vehicle width direction from the connection position between the rear roof rail upper panel and the body side drain force. In the closed cross section formed by the body side inner panel and the body side drain force, an inner reinforcement that reinforces the closed cross section is provided at a position on the outer side in the vehicle width direction from the connection position and on the inner side in the vehicle width direction from the fixed position. Therefore, a closed cross section surrounded by the body side inner panel, the body side drain force, and the inner reinforcement can be formed below the connection position, and the rigidity of the rear roof rail can be further increased .

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a perspective view of a vehicle body rear structure according to the present embodiment, FIG. 2 is an exploded perspective view of the vehicle body rear structure, and FIG. FIG. 4 is a cross-sectional view of the rear structure of the vehicle body, and is a cross-sectional view at S2 in FIG. In the figure, FR indicates the front in the vehicle longitudinal direction, IN indicates the inner side in the vehicle width direction, and UP indicates the upper side of the vehicle.

  In the vehicle body rear part structure according to the present embodiment, a body side inner panel 1 and a body side drain force 2 are provided as members constituting the upper part and the rear part of the vehicle body side part. In the present embodiment, the body side drain force 2 forms a body side outer together with a side outer panel (not shown) disposed on the outer side in the vehicle width direction than the body side drain force 2.

  At the corners of the upper end and rear end of the vehicle side, starting from the corner, along the three sides of the roof rear edge (upper edge of the back door opening), the roof side edge, and the back door opening side edge, respectively The body side inner panel 1 and the body side drain force 2 are flange-bonded to each other in a substantially Y-shaped section of a predetermined length, and at least in the Y-shaped section, the body side inner panel 1 and the body A substantially rectangular closed cross section is formed by the side drain force 2.

  On the other hand, the rear roof rail lower panel 3 and the rear roof rail upper panel 4 extend along the vehicle width direction at the upper edge of the back door opening.

  The rear roof rail lower panel 3 includes a vertical wall portion 3a extending substantially upward in the vehicle and a lower wall portion 3b extending substantially rearward in the vehicle front-rear direction, and has a substantially L-shaped cross section (substantially L-shaped in a side view). Has been. Note that through holes 3c for inserting bolts are formed in the flat portions at both ends in the vehicle width direction.

  On the other hand, the rear roof rail upper panel 4 has a vertical wall portion 4a extending substantially upward in the vehicle and a lower wall portion 4b extending substantially rearward in the vehicle front-rear direction, and is substantially L-shaped in cross section (substantially L-shaped in side view). ). The vertical wall portion 4a is formed with a plurality (three in this embodiment) of ridge portions (beads) 4c extending in the vehicle width direction so as to improve bending rigidity. A through hole 4d for inserting a bolt is formed in the flat part at both ends in the vehicle width direction.

  Then, with the lower wall portion 4b of the rear roof rail upper panel 4 placed on the lower wall portion 3b of the rear roof rail lower panel 3, the lower wall portions 3b, 4b are joined to each other by welding or the like.

  At this time, in the present embodiment, the vertical wall portion 3a of the rear roof rail lower panel 3 and the vertical wall portion 4a of the rear roof rail upper panel 4 are arranged at a predetermined interval to improve bending rigidity and torsional rigidity in the rear roof rail. I am trying. The rear roof rail upper panel 4 corresponds to a reinforcing member (reinforce) in the rear roof rail.

  In the S1 cross section closer to the rear edge (cross section perpendicular to the vehicle longitudinal direction), as shown in FIG. 3, the body side drain force 2 has a bulging portion 2a bulging upward at the vehicle width direction end portion. And a lower extending portion 2b extending along the roof rail (upper edge of the back door opening) at a position on the inner side in the vehicle width direction from the bulging portion 2a and lower than the bulging portion 2a.

  Then, at both ends of the rear roof rail lower panel 3 and the rear roof rail upper panel 4, a lower extending portion 2b of the body side drain force 2, a lower wall portion 3b of the rear roof rail lower panel 3, and a lower wall portion 4b of the rear roof rail upper panel 4 are provided. The lower extending portion 2b, the lower wall portion 3b, and the lower wall portion 4b are connected to each other in this order from the bottom to the top.

  Further, the base portion 6a of the hinge 6 of the back door is superimposed on this portion, and the base portion 6a of the hinge 6 and the rear roof rail upper are fastened by fasteners (bolts and nuts) 7 for fixing the hinge 6. The lower wall portion 4b of the panel 4, the lower wall portion 3b of the rear roof rail lower panel 3, and the lower extending portion 2b of the body side drain force 2 are fixed together. That is, in the present embodiment, the fastening position Q of the fastener 7 is the connection position between the rear roof rail upper panel 4 and the body side drain force 2.

  At this time, it is preferable that the lower wall portions 3b, 4b and the lower extending portion 2b are joined to each other by welding or the like in advance (before being fastened by the fastener 7). The joining position is also a connection position.

  Here, in the present embodiment, the vehicle width direction inner ends of the body side inner panel 1 and the body side drain force 2 are the lower wall portion 4b of the rear roof rail upper panel 4 and the lower wall portion 3b of the rear roof rail lower panel 3. , And the body side drain force 2 (further, the base portion 6a of the hinge 6).

  Further, a relatively flat space (hollow part) is formed between the body side inner panel 1 and the body side drain force 2, and a connection position (fastening) between the rear roof rail upper panel 4 and the body side drain force 2 is formed. An inner reinforcement 5 having a substantially U-shaped cross section is provided at a position on the outer side in the vehicle width direction from the fastening position Q) of the tool 7, and the body side inner is provided below the connection position (fastening position Q). A substantially rectangular closed cross section is formed by the side extending portion 1a of the panel 1, the lower extending portion 2b of the body side drain force 2, and the inner reinforcement 5 (the wall portion on the vehicle interior side). Thereby, the rigidity at the connection position (fastening position Q) is improved.

  In this embodiment, the fixing position P for fixing the rear end portion and the side end portion of the roof panel 8 (FIGS. 3 and 4) to the bulging portion 2 a of the body side drain force 2 is the same as that of the rear roof rail upper panel 4. It is set outside the passenger compartment from the connection position (fastening position Q) with the body side drain force 2. That is, the fixed position P and the connection position (fastening position Q) are spaced apart in the vehicle width direction.

  On the other hand, the S2 cross section in front of the vehicle front-rear direction from the S1 cross-section (the cross-section perpendicular to the vehicle front-rear direction and ahead of the rear roof rail upper panel 4 in the vehicle front-rear direction, in other words, As shown in FIG. 4, the body side drain force 2 is directed from the bulging portion 2a toward the inside in the vehicle width direction in the section between the portion 4a and the vertical wall portion 3a of the rear roof rail lower panel 3). An upper extending portion 2c is provided.

  The upper extending portion 2c is disposed at a position above the vehicle from the lower extending portion 2b and at substantially the same height as the bulging portion 2a. An inclined portion that gradually rises forward in the front-rear direction of the vehicle is formed from the lower extending portion 2b to the upper extending portion 2c.

  Then, as the height of the space between the side extending portion 1a of the body side inner panel 1 and the upper extending portion 2c of the body side drain force 2 is increased, the height of the inner reinforcement 5 is also increased. ing.

  According to the present embodiment described above, the connection position (fastening position Q) between the rear roof rail upper panel 4 and the body side drain force 2 as the body side outer is the fixed position where the roof panel 8 is fixed to the body side drain force 2. Since the connection position (fastening position Q) and the fixed position P are set apart from each other in the vehicle width direction from P in the vehicle width direction, the bending force generated in the rear roof rail upper panel 4 causes the connection position at the connection position. Even when the stress becomes high, the roof panel 8 can be prevented from coming off the body side drain force 2.

  According to the present embodiment, at least the vertical wall portion 4a and the lower wall portion are provided on the lower wall portion 3b of the rear roof rail lower panel 3 having a substantially L-shaped cross section having at least the vertical wall portion 3a and the lower wall portion 3b. The lower wall portion 4b of the rear roof rail upper panel 4 having a substantially L-shaped cross section having 4b is placed, the lower wall portions 3b and 4b are joined together, and the rear roof rail lower panel and rear Manufacturing effort, such as reducing the number of joints by increasing the rigidity of the rear roof rail with the open cross-section, without forming a substantially rectangular closed cross-section extended in the vehicle width direction by the roof rail upper panel And the manufacturing cost can be reduced.

  In particular, by providing the vertical wall portions 3a, 4a of the rear roof rail upper panel 4 and the rear roof rail lower panel 3 with an appropriate space in the vehicle front-rear direction, the bending rigidity of the rear roof rail is improved and the torsional rigidity is improved. Can also be planned.

  Moreover, the rigidity of a rear roof rail can be further improved by providing the vertical wall part 3a and the vertical wall part 4a with the protrusion (bead) extended in a vehicle width direction suitably.

  Further, according to the present embodiment, the vehicle side direction of the body side inner panel 1 and the body side drain force 2 on the inner side in the vehicle width direction from the connection position (fastening position Q) between the rear roof rail upper panel 4 and the body side drain force 2. The inner ends are joined to each other, and in the closed cross section formed by the body side inner panel 1 and the body side drain force 2, the vehicle width direction outside the connection position (fastening position Q) and the fixed position. Since the inner reinforcement 5 that reinforces the closed cross section is provided at the inner position, the body side inner panel 1, the body side drain force 2, and the inner reinforcement 5 are provided below the connection position (fastening position Q). The enclosed closed section can be configured, and the rigidity of the rear roof rail can be further increased. .

  Further, according to the present embodiment, the base portion 6 a of the hinge 6 of the back door, the lower wall portion 4 b of the rear roof rail upper panel 4, and the lower side as an end region on the inner side in the vehicle width direction of the body side drain force 2. The extending portion 2b is superposed vertically, and the base portion 6a, the lower wall portion 4b of the rear roof rail upper panel 4 and the lower extending portion 2b as the end region are connected to each other, so that the base portion 6a of the hinge is connected. As a result, the rigidity of the rear roof rail at the connection position (fastening position Q) can be further increased.

  Furthermore, according to this embodiment, since the lower wall portion 3b of the rear roof rail lower panel 3 is further overlapped and joined to the connection position (fastening position Q), the rigidity of the rear roof rail at the connection position can be further enhanced. it can.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made.

  For example, the shape of the body side inner panel and the body side outer may be any shape as long as it has a substantially rectangular closed cross section at least in the corner portion at the upper part of the back door opening. The shape shown is not limited. For example, the same effect can be obtained when the above-described structure is constructed using the side outer panel instead of the body side drain force as the body side outer.

  Further, the shapes of the rear roof rail lower panel 3 and the rear roof rail upper panel 4 are not limited to the above embodiment. For example, the rear roof rail lower panel 3 may be provided with a ridge (bead) that extends in the vehicle width direction. In addition, it is preferable that the vertical wall portions 3a and 4a and the lower wall portions 3b and 4b are appropriately formed with uneven shapes to improve the rigidity.

The perspective view of the vehicle body rear part structure concerning embodiment of this invention. The disassembled perspective view of the vehicle body rear part structure concerning embodiment of this invention. It is sectional drawing of the vehicle body rear part structure concerning embodiment of this invention, Comprising: Sectional drawing in S1 of FIG. It is sectional drawing of the vehicle body rear part structure concerning embodiment of this invention, Comprising: Sectional drawing in S2 of FIG.

Explanation of symbols

1 Body side inner panel 2 Body side drain force (Body side outer)
2b Lower extension part (end area)
3 Rear roof rail lower panel 3a Vertical wall portion 3b Lower wall portion 4 Rear roof rail upper panel 4a Vertical wall portion 4b Lower wall portion 5 Inner Reinforce (Rainforce)
6 Hinge 6a Base P Fixed position Q Fastening position (connection position)

Claims (4)

A rear roof rail lower panel extending in the vehicle width direction at the upper edge of the back door opening;
A rear roof rail upper panel disposed adjacent to the upper side of the rear roof rail lower panel along the rear roof rail lower panel;
A body side inner panel and a body side outer that are joined together to form a closed cross section at least at the top and rear end of the side of the vehicle body;
Including
The connection position of the rear roof rail upper panel and the body side outer is set on the inner side in the vehicle width direction from the fixed position for fixing the rear end portion and the side end portion of the roof panel to the body side outer, and the rear The ends on the vehicle width direction inner side of the body side inner panel and the body side outer are connected to each other on the inner side in the vehicle width direction from the connection position of the roof rail upper panel and the body side outer ,
In the closed cross section formed by the body side inner panel and the body side outer, outside the vehicle width direction from the connection position of the rear roof rail upper panel and the body side outer, and the rear end and side end of the roof panel A vehicle body rear structure , wherein a reinforcement for reinforcing the closed cross section is provided at a position on the inner side in the vehicle width direction from a fixing position for fixing the body side outer to the body side outer . The rear roof rail upper panel is formed in a substantially L-shaped cross section having a vertical wall portion extending substantially upward in the vehicle and a lower wall portion extending substantially rearward in the vehicle front-rear direction.
The rear roof rail lower panel is formed in a substantially L-shaped cross section having a vertical wall portion extending substantially upward in the vehicle and a lower wall portion extending substantially rearward in the vehicle front-rear direction.
The vehicle body rear structure according to claim 1, wherein lower wall portions of the rear roof rail upper panel and the rear roof rail lower panel are joined to each other. The base part of the hinge of the back door, the lower wall part of the rear roof rail upper panel, and the end part region on the inner side in the vehicle width direction of the body side outer are vertically overlapped, and the base part and the rear roof rail upper panel The rear body structure according to claim 1 or 2 , wherein a lower wall portion and an end region of the vehicle body are connected to each other. The base portion of the hinge of the back door, the lower wall portion of the rear roof rail upper panel, the lower wall portion of the rear roof rail lower panel, and the end region of the body side outer in the vehicle width direction are overlapped vertically. 4. The vehicle body rear structure according to claim 3 , wherein the base portion, the lower wall portion of the rear roof rail upper panel and the rear roof rail lower panel, and the end region are connected to each other.

Images