JP5472647B2 - Backdoor opening reinforcement structure - Google Patents

Description

  The present invention relates to a reinforcing structure for a back door opening, and more particularly to a reinforcing structure for a back door opening having a rear pillar formed by an inner panel and an outer panel and a rounded region formed at a corner portion.

Conventionally, a reinforcement structure of a back door opening for reinforcing a back door opening formed at the rear part of the vehicle has been proposed.
For example, as shown in FIG. 11, Patent Document 1 discloses a conventional reinforcing structure that reinforces a back door opening formed at the rear of a vehicle. As shown in FIG. 11, an arcuate curved portion 90 is provided in the lower corner 88 of the back door opening 86 of the vehicle, a brace 94 is provided in the rear end cross member 92, and the upper end of the brace 94 is The lower end 98 is joined to the vehicle center side from the upper end 100. As described above, since the brace 94 is provided so as to be inclined toward the vehicle center side from the radius stop portion 96, the rear end cross member 92 at the lower end 98 in which the stress applied to the radius stop portion 96 is shifted from the radius stop portion 96 toward the vehicle center side. There is known a structure that can be dispersed in the joint portion.

JP 2010-234975 A

  However, in the above-described conventional structure for reinforcing the back door opening, the brace 94 provided in the rear end cross member 92 reinforces the radius stop 96 from the lower end of the rear end cross member 92, so that the back door opening 86 is enlarged. When the radius is further reduced, if the load input from the road surface is concentrated on the corner 90 of the corner of the back door opening 86, the round portion 90 may be deformed. There was a problem that it was not enough.

  Therefore, the present invention has been made to solve the problems of the prior art, and even when the radius (= curvature radius) of the radius portion of the radius shape region formed in the corner portion is reduced, the radius shape region. It is an object of the present invention to provide a reinforcing structure for a back door opening that can ensure the necessary rigidity.

In order to achieve the above object, the present invention provides a rear pillar inner panel provided at a side edge of a back door opening of a vehicle, and a vehicle rear side provided at a side edge of the back door opening outside the inner panel of the vehicle. A rear pillar outer panel connected to the inner side of the outer panel formed on the inner side of the outer panel, and a rear pillar formed by at least a part of the rear pillar. The rounded region has a rounded portion forming a rounded corner, a side edge extending from the rounded portion along the side edge of the back door opening, and a back door opening from the rounded portion. and a lateral portion extending along the lateral edge parts, further reinforcing the radius-shaped region between the rear pillar inner panel and the outer panel Has a strong member, together with the reinforcing member is provided from the side edge portion of the radius-shaped region to the lateral edge through the rounded portion, side edges and radius of the inner side edge and an outer edge radius-shaped region of the reinforcing member It is characterized by being welded to the rear pillar outer panel at the part .
In the thus constructed present invention, between the reinforcing member rear pillars inner panel and the outer panel, Rutotomoni provided from the side edge portion of the radius-shaped region to the lateral edge through the rounded portion, the inner edge of the reinforcing member And the outer edge is welded to the rear pillar outer panel at the side edge and the rounded portion of the rounded region to reinforce the rounded region, so that the rounded portion of the rounded region formed at the corner of the back door opening is reduced. Even in this case, it is possible to ensure the necessary rigidity that is unlikely to cause deformation in this rounded region.

In the present invention, preferably, the rounded region is formed in a corner portion at the upper part of the back door opening, and the reinforcing member is a damper rain of a damper that absorbs vibration when the back door is opened and closed. .
In the present invention thus configured, the damper rain forms a reinforcing member in the rounded region at the corner portion at the upper part of the back door opening, so that the number of parts used for reinforcement is prevented from increasing, and It is possible to secure necessary rigidity that is difficult to cause deformation in the shape region.

In the present invention, preferably, the reinforcing member has three plate-like members, which are a rear pillar outer panel, a rear pillar inner panel, and a reinforcing member, welded together at an inner edge thereof, and an outer panel, a rear pillar outer panel, and a reinforcing member at an outer edge thereof. The three plate-like members of the members are welded together.
In the present invention configured as described above, the reinforcing member is welded in such a manner that the inner edge of the rear pillar outer panel and the three plate members of the reinforcing member and the rear pillar inner panel are welded together in the round shape region, and the outer edge is the outer panel, Since the three plate-like members of the rear pillar outer panel and the reinforcing member are welded together , a three-layer structure is formed in the rounded region, and the rounded region can be reinforced, and the required rigidity is unlikely to cause deformation in the rounded region. Can be secured.

  According to the reinforcing structure of the back door opening of the present invention, even when the radius of the radius portion of the radius region formed in the corner portion is reduced, the rigidity required for the radius region can be ensured.

It is a perspective view showing the structure of the exterior of the vehicle body rear part of the vehicle by the embodiment of the present invention. It is a perspective view which shows the state which removed the roof panel, back door, and outer panel of the vehicle body rear part of the vehicle of FIG. FIG. 3 is a perspective view showing a state where a right half of a roof header at the rear of the vehicle body of FIG. 2 is removed. FIG. 4 is a perspective view showing the structure of the rear part of the vehicle body with the left half of the roof header, the rear pillar outer and the reinforcing member removed from the rear part of the vehicle body shown in FIG. 3. It is the perspective view seen from the vehicle interior of the state which removed the rear pillar inner panel of the vehicle body rear part of the vehicle by the embodiment of the present invention. FIG. 3 is a partially enlarged perspective view showing a structure around an upper corner portion on the right side of the vehicle in a state where an outer panel of a reinforcing structure of a back door opening shown in FIG. 2 is removed. FIG. 3 is a partially enlarged perspective view showing a structure around an upper corner portion on the right side of the vehicle in a state where a rear pillar outer panel having a reinforcing structure for a back door opening shown in FIG. 2 is removed. It is sectional drawing seen along the VIII-VIII line of FIG. It is sectional drawing seen along the IX-IX line of FIG. It is a partial expansion perspective view which shows the structure of the upper corner part periphery of the vehicle right side in the state which removed the outer panel of the reinforcement structure of the back door opening of the vehicle by the modification of embodiment of this invention. It is sectional drawing which shows the reinforcement structure of the conventional back door opening.

Hereinafter, the reinforcing structure of the back door opening according to the embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a perspective view mainly showing the exterior structure of a rear part of a vehicle body according to an embodiment of the present invention, and FIG. 2 shows a state where a roof panel, a back door, and an outer panel of the rear part of the vehicle of FIG. 3 is a perspective view showing a state in which the right half of the roof header at the rear of the vehicle body of FIG. 2 is removed. FIG. 4 is a perspective view of the left side of the roof header from the rear of the vehicle body of FIG. It is a perspective view which shows the structure of the vehicle body rear part of the vehicle of the state which removed the half, rear pillar outer, and the reinforcement member.

  As shown in FIG. 1, reference numeral 1 denotes a vehicle. The vehicle 1 includes a roof panel 2 that covers a ceiling portion of a vehicle compartment, an outer panel 4 that forms left and right side surfaces of the vehicle, and a vehicle compartment. And a back door 6 covering the rear part.

As shown in FIG. 2, the vehicle 1 includes a reinforcing structure 10 that reinforces a back door opening 8 that opens in a quadrilateral shape toward the passenger compartment when the back door 6 is opened. The reinforcement structure 10 of the vehicle 1 includes a pair of left and right upper corner portions 16 that form an upper corner that bends from a vertical side edge 12 of the back door opening 8 to a horizontal upper horizontal edge 14, and a back door opening. A pair of left and right lower corner portions 20 forming a lower corner that bends from a vertical side edge 12 to a horizontal lower horizontal edge 18 is formed.
The reinforcing structure 10 includes a roof header 22 extending in the vehicle width direction above the back door opening 8, a pair of left and right rear pillars 24 extending from the side edge 12 of the back door opening 8 toward the upper corner portion 16, And a rear end panel 26 extending in the vehicle width direction from the lower side of the rear pillar 24 so as to partition the vehicle compartment and the outside at the rearmost side.
The upper corner portion 16 of the reinforcing structure 10 is provided with a damper 28 that absorbs vibration when the back door is opened and closed, and a roof side rail 30 extending in the vehicle front-rear direction is connected to the vehicle side upper portion. In addition, in FIG. 1 thru | or FIG. 10 (except FIG.2 and FIG.7), illustration of the damper 28 is abbreviate | omitted.

  FIG. 3 shows a closed cross-sectional structure of the roof header 22 of the reinforcing structure 10 in a state where the roof header 22 is cut at the center portion in the vehicle front-rear direction and the right half of the roof header is removed. A cross section of the roof header 22 in the vehicle front-rear direction is formed in a closed cross-sectional structure 32. The roof header 22 has high rigidity with respect to bending load, torsional load and the like due to the closed cross-sectional structure 32, and the rigidity of the peripheral portion of the back door opening 8 is enhanced by connecting the closed cross-sectional structure 32 and other members. And forms part of the reinforcing structure.

Next, as shown in FIGS. 3 and 4, the rear pillar 24 includes a rear pillar outer panel 34 formed on the rear outer side of the rear pillar 24, a rear pillar rain 36 formed on the inner side of the rear pillar outer panel 34, and A rear pillar inner panel 38 formed inside the vehicle body of the rear pillar rain 36 is provided.
The rear pillar outer panel 34 of the rear pillar 24 extends from the side edge 12 of the back door opening 8 to the upper corner portion 16 of the back door opening 8.
The rear pillar rain 36 of the rear pillar 24 extends from the side edge 12 of the back door opening 8 toward the roof side rail 30 on the side of the vehicle body and on the front upper side. The upper front end 36a of the rear pillar rain 36 The rail 30 is connected.
The rear pillar inner panel 38 of the rear pillar 24 extends from the side edge 12 of the back door opening 8 through the upper corner portion 16 to the upper lateral edge 14 of the back door opening 8 inside the rear pillar rain 36, and further to the front of the vehicle. It extends toward the roof side rail 30 on the upper side.

FIG. 5 is a perspective view as seen from the passenger compartment with the rear pillar inner panel at the rear of the vehicle body according to the embodiment of the present invention removed. As shown in FIG. 5, the rear end panel 26 is provided on the lower outer side of the vehicle body, is connected to the rear pillar outer panel 34 at the upper end, extends vertically below the rear pillar outer panel 34, and is side edges of the back door opening 8. 12, the lower corner portion 20 is curved inward in the vehicle width direction and extends substantially horizontally to form a lower lateral edge 18 of the back door opening 8.
A lower rear pillar rain 40 is formed inside the rear end panel 26 in the vehicle compartment direction, and a rear pillar inner panel 38 is formed inside the rear end panel 26 in the vehicle compartment direction. A wheel house 42 is formed on the front side of the rear end panel 26 and outside the rear pillar inner panel 38 in the vehicle width direction. The wheel house 42 has an upper surface extending in an arch shape in a side view. A rear suspension 44 that receives a load input from the road surface is attached to an upper center portion of the wheel house 42.

6 is a partially enlarged perspective view showing a structure around the upper corner portion on the right side of the vehicle in a state where the outer panel of the reinforcing structure of the back door opening shown in FIG. 2 is removed. As shown in FIG. 6, the upper end portion 34a of the rear pillar outer panel 34 is provided to be separated from the closed cross-sectional structure 32 of the roof header 22 of the reinforcing structure 10 by the length of W1.
The upper upper end portion 36b of the rear pillar rain 36 is provided so as to be separated from the closed sectional structure 32 of the roof header 22 of the reinforcing structure 10 by a length W2.

The rear pillar outer panel 34 of the rear pillar 24 and the rear pillar rain 36 of the rear pillar are directions of an arrow A from the lower part of the rear pillar outer panel 34 toward the upper roof side rail 30, that is, a direction in which a load is transmitted toward the roof side rail 30. It is welded by spot welding at a plurality of locations arranged along the vehicle side upward direction.
The welded portion by spot welding between the rear pillar rain 36 of the rear pillar 24 and the rear pillar inner panel 38 of the rear pillar 24 transmits a load toward the roof side rail 30 on the front side of the upper corner portion 16, that is, toward the roof side rail 30. Are welded by spot welding at a plurality of positions aligned along the vehicle side upward direction. For example, the welding at a plurality of places is performed by welding at a plurality of places arranged in a line.

Next, as shown in FIGS. 5 and 6, the reinforcing structure 10 of the vehicle 1 includes an upper round-shaped region 46 set to cover the upper corner portion 16 and a lower corner portion 20 of the reinforcing structure 10. A lower round-shaped region 48 set so as to cover is provided.
The upper rounded region 46 includes an upper rounded portion 50 in which a rounded corner (= arc-shaped portion) is formed, and a side edge extending from the upper rounded portion 50 along the side edge 12 of the back door opening 8. 52 and an upper lateral edge 54 extending from the upper rounded portion 50 along the upper lateral edge 14 of the back door opening 8.
The upper rounded portion 50 of the upper rounded region 46 extends with a predetermined width from the position L1 to the position L2 along the rounded corner of the upper corner portion 16. The side edge portion 52 of the upper rounded region 46 extends substantially linearly with a predetermined width from the position L1 of the upper rounded portion 50 along the side edge 12 of the back door opening 8 to the lower position L3. The upper lateral edge portion 54 of the upper rounded region 46 extends substantially linearly with a predetermined width from the position L2 of the upper rounded portion 50 to the position L4 in the vehicle width direction along the upper lateral edge 14 of the back door opening 8. Yes.

The lower round shape region 48 includes a lower round portion 56 in which a round portion of the lower corner portion 20 is formed, and a lower side edge portion 58 extending from the lower round portion 56 along the side edge 12 of the back door opening 8. The lower lateral edge portion 60 extends along the lower lateral edge 18 of the back door opening 8 from the lower rounded portion 56.
The lower rounded portion 56 of the lower rounded region 48 extends in a curved manner along the rounded corner of the lower corner portion 20 from the position L5 to the position L6. The lower side edge 58 of the lower rounded region 48 extends substantially linearly from the position L6 of the lower rounded portion 56 to the upper position L7 along the side edge 12 of the back door opening 8. The lower lateral edge 60 of the lower rounded region 48 extends substantially linearly from the position L5 of the lower rounded portion 56 to the position L8 in the vehicle width direction along the lower lateral edge 18 of the back door opening 8.

  The size of the radius (= curvature radius) of the upper radius portion 50 of the upper radius region 46 is formed to be about 10% smaller than the size of the radius before the opening area of the back door opening 8 is enlarged. The radius of the lower radius 56 of the lower radius region 48 is formed to be approximately 30% smaller than the size of the radius before the opening area of the back door opening 8 is enlarged. The sum of the radius of 50 and the radius of the lower radius 56 is about 20% smaller than the sum of the radius before the opening area of the back door opening 8 is enlarged. ing.

FIG. 7 is a partially enlarged perspective view showing a structure around the upper corner portion on the right side of the vehicle in a state in which the rear pillar outer panel of the back door opening reinforcing structure shown in FIG. 2 is removed.
As shown in FIG. 7, the upper corner portion 16 of the back door opening 8 is provided with a damper rain 62 in which a straight portion including both ends of the upper corner portion 16 and extending from the upper corner portion 16 is formed. More specifically, in the damper rain 62, a vertical straight portion and a horizontal straight portion extending from both ends of the arc-shaped round portion along the upper corner portion 16 are integrally formed. The damper rain 62 is connected to a damper 28 that absorbs vibration when the back door is opened and closed. The damper rain 62 also functions as a damper support member that supports the damper 28, and is a plate-like member having a thickness necessary to ensure durability enough to receive a load from the damper 28.

The damper rain upper horizontal edge portion 64 of the damper rain 62 extends into the upper horizontal edge portion 54 of the upper round-shaped region 46, and is formed in a flat plate shape having a predetermined width substantially in the vehicle width direction. The tip of the damper rain upper lateral edge 64 is extended to a position overlapping vertically below the closed cross-sectional structure 32 of the roof header 22.
The damper rain upper round portion 66 of the damper rain 62 extends in a curved manner so as to cover the upper round portion 50 of the upper round shape region 46.
The damper rain side edge 68 of the damper rain 62 extends into the side edge 52 of the upper round-shaped region 46, and is formed in a flat plate shape that extends substantially vertically downward. Thus, the damper rain 62 extends from the upper lateral edge 54 of the upper rounded region 46 to the side edge 52 through the upper rounded portion 50, that is, from the upper lateral edge 14 of the back door opening 8 of the vehicle 1. It extends over the side edge 12 through the corner portion 16 and is connected to these portions.
The damper rain 62 is integrally formed from the damper rain upper lateral edge portion 64 through the damper rain upper round portion 66 to the damper rain side edge portion 68, but each part or part of the damper rain 62 is formed as a separate body. Also good.

Next, the connection relationship between the damper rain 62 and other members will be described.
FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 3, where the right-hand direction in the drawing indicates the vehicle side, and the upward direction in the drawing indicates the front direction of the vehicle.
As shown in FIG. 8, an outer panel 4, a rear pillar outer panel 34, a damper rain 62, a rear pillar rain 36, and a rear pillar inner panel 38 are disposed in the vehicle body 1 in order from the outside of the vehicle body 1.
As shown in the lower left part of FIG. 8, at the side edge 52 of the upper rounded region 46, the rear pillar outer panel 34, the damper rain 62, the rear pillar inner, in order from the outside of the vehicle body along the side edge 12 of the back door opening 8. A panel 38 is disposed, and these three plate-like members are combined into a three-layer structure and welded by spot welding at a plurality of locations. The outer panel 4, in order from the outside of the vehicle body, along the outer end portion 70 of the damper rain 62 formed from the side edge 12 of the back door opening 8 to the vehicle width outer side at the side edge 52 of the upper round-shaped region 46. The rear pillar outer panel 34 and the damper rain 62 are disposed, and these three plate-like members are combined into a three-layer structure and welded by spot welding at a plurality of locations.

In the upper rounded portion 50 of the upper rounded region 46, a rear pillar outer panel 34, a damper rain 62, and a rear pillar inner panel 38 are arranged in order from the outside of the vehicle body along the edge of the upper corner portion 16 of the back door opening 8. Three plate-like members are combined into a three-layer structure and welded by spot welding at a predetermined location. The outer panel 4 and the rear pillar outer panel 34 are arranged in this order from the outside of the vehicle body along the outer end portion 70 of the damper rain 62 formed in the upper rounded portion 50 of the upper rounded region 46 from the upper rounded portion 50 in the vehicle width outward direction. The damper rain 62 is arranged, and these three plate-like members are combined into a three-layer structure and welded by spot welding at a predetermined location.
In the upper lateral edge portion 54 of the upper round-shaped region 46, the damper rain 62 is disposed on the rear pillar inner panel 38 and is welded to the rear pillar inner panel 38 by spot welding at a predetermined location. In a portion where the damper rain 62 is not formed, the rear pillar inner panel 38 and the roof header 22 are welded by spot welding.

Next, as shown in FIG. 5, the lower corner portion 20 of the back door opening 8 has a vertical straight portion and a horizontal straight portion extending on both sides of the arc-shaped round portion along the lower corner portion 20. A lower round-shaped region reinforcing member 74 is provided.
The reinforcing member side edge portion 76 of the lower round-shaped region reinforcing member 74 extends into the lower side edge portion 58 of the lower round-shaped region 48 and is formed substantially vertically upward.
The reinforcing member lower round portion 78 of the lower round shape region reinforcing member 74 is curved and extends so as to cover the lower round portion 56 of the lower round shape region 48.
The reinforcing member lower lateral edge portion 80 of the lower round-shaped region reinforcing member 74 is extended by a predetermined length within the lower lateral edge portion 60 of the lower round-shaped region 48 and is formed as a separate body substantially in the vehicle width direction. Has been.
The lower round-shaped region reinforcing member 74 extends from the lower side edge 58 to the lower rounded portion 56 of the lower round-shaped region 48, that is, from the side edge 12 of the back door opening 8 of the vehicle 1 to the lower corner portion 20. ing.
As described above, the lower round-shaped region reinforcing member 74 is integrally formed from the lower side edge 58 of the lower round-shaped region 48 through the lower rounded portion 56 to the lower lateral edge 60. In addition, each part or part of the lower round shape area | region reinforcement member 74 may be formed as a different body.

9 is a cross-sectional view taken along line IX-IX in FIG.
As shown in FIG. 9, a rear end panel 26, a lower rear pillar rain 40, a lower round shape region reinforcing member 74, and a rear pillar inner panel 38 are arranged in the vehicle body 1 in order from the outside of the vehicle body 1.
The lower round shape region reinforcing member 74 is welded to the rear pillar inner panel 38 by spot welding between the lower rear pillar rain 40 and the rear pillar inner panel 38 at a plurality of locations.
A lower rear pillar rain 40 is welded to the rear pillar inner panel 38 at an upper portion thereof, and a rear end panel 26, a lower rear pillar rain 40, and a rear pillar inner panel 38 are joined to the lower portion of the rear pillar inner panel 38 in order from the outside of the vehicle body. However, these three plate-like members are combined into a three-layer structure and are welded by spot welding at predetermined locations.

Next, the effect of the reinforcing structure for the back door opening according to the embodiment of the present invention described above will be described.
According to the reinforcing structure of the back door opening according to the embodiment of the present invention, the rounded region 46 is formed in the upper corner portion 16 and the lower corner portion 20 of the back door opening 8. A reinforcing member 62 for the upper rounded region 46 is provided between the rear pillar inner panel 38 and the rear pillar outer panel 34 from the side edge 52 of the upper rounded region 46 to the upper lateral edge 54 through the upper rounded portion 50, Since the upper round-shaped region 46 is reinforced, even if the upper round-shaped portion 50 of the upper round-shaped region 46 has a small rounded shape, the upper round-shaped region 46 has a necessary rigidity that is difficult to be deformed. Can be secured.
Furthermore, according to the reinforcing structure of the back door opening according to the embodiment of the present invention, the lower round-shaped region reinforcing member 74 of the lower round-shaped region 48 is disposed between the rear pillar inner panel 38 and the rear end panel 26. Since the lower round-shaped region 48 is reinforced from the lower side edge 58 to the lower lateral edge 60 through the lower round-shaped portion 56, the lower round-shaped portion 48 of the lower round-shaped region 48 is reduced. The lower round-shaped region 48 can secure the necessary rigidity that is less likely to be deformed in the lower round-shaped region 48.

  Further, according to the reinforcing structure of the back door opening according to the embodiment of the present invention, the damper rain 62 formed in the upper corner portion 16 of the back door opening 8 is formed into the upper round shape of the upper corner portion 16 of the back door opening 8. Since the reinforcing member of the region 46 is formed, the damper member 62 of the damper 28 that absorbs vibration when the back door 6 is opened and closed is used as the reinforcing member, thereby preventing the work and additional cost of newly increasing the number of parts used for reinforcement. At the same time, the upper round-shaped region 46 can secure the necessary rigidity that is difficult to deform in the upper round-shaped region 46.

  Further, according to the reinforcing structure of the back door opening according to the embodiment of the present invention, the lower side edge 58 of the rounded region 48 formed in the lower part of the back door opening 8 where the load input of the rear suspension 44 of the vehicle 1 is easily applied. Since the lower rounded portion 56 is at least reinforced, the lower side edge portion 58 and the lower rounded portion 56 of the rounded region 48 are moved toward the interior of the interior of the back door opening 8 by the load input of the rear suspension 44. It is possible to suppress deformation of the rounded region such as falling and twisting occurring in the lower rounded region 48.

  Further, according to the reinforcing structure of the back door opening according to the embodiment of the present invention, the three plate-shaped members of the rear pillar outer panel 34, the damper rain 62, and the rear pillar inner panel 38 are welded together in the upper round-shaped region 46. A three-layer structure is formed in the upper round-shaped region 46, so that the upper round-shaped region 46 can be reinforced and necessary rigidity can be ensured that the upper round-shaped region 46 is hardly deformed.

  Further, according to the reinforcing structure of the back door opening according to the embodiment of the present invention, the upper side upper end portion 36b of the rear pillar rain 36 and the closed section of the roof header 22 are sufficiently strengthened when the back door opening 8 is enlarged. Since the structure 32 is provided apart from the structure 32, the load transmitted to the rear pillar rain 36 out of the input load from the road surface during traveling tends to flow upward on the side of the vehicle. Therefore, it is possible to prevent the input load from the road surface during traveling from flowing in a concentrated manner in the upper round-shaped region 46 toward the roof header 22.

  Further, according to the reinforcing structure of the back door opening according to the embodiment of the present invention, the closed cross-sectional structure 32 of the upper end portion 34a of the rear pillar outer panel 34 and the roof header 22 is sufficiently strengthened when the back door opening 8 is enlarged. Are separated from each other, so that the load transmitted to the rear pillar outer panel 34 and the rear pillar rain 36 out of the input load from the road surface during traveling travels along the rear pillar rain extending upward in the vehicle lateral direction. Easy to flow into. Therefore, it is possible to prevent the input load from the road surface during traveling from flowing in a concentrated manner in the upper round-shaped region 46 toward the roof header 22.

  Further, according to the reinforcing structure of the back door opening according to the embodiment of the present invention, the rounded region reinforcing member 62 reinforces the upper rounded region 46 of the upper corner portion 16 of the back door opening 8. While ensuring sufficient reinforcement of the upper corner portion 16 when 8 is enlarged, the upper round-shaped region 46 is secured with sufficient rigidity to prevent deformation, and an input load from the road surface during traveling is directed toward the roof header 22. Thus, it is possible to prevent the concentrated flow in the upper rounded region 46, to prevent spot welding peeling in the upper rounded region 46 due to the concentrated flow of the load, and to improve the durability. can do.

  Further, according to the reinforcing structure of the back door opening according to the embodiment of the present invention, the rounded region reinforcing member 62 is disposed between the rear pillar inner panel 38 and the rear pillar outer panel 34 from the side edge portion 52 of the upper rounded region 46. Since the upper round-shaped region 46 is provided through the portion 50 to the upper lateral edge 54 and reinforces the upper round-shaped region 46, the upper round-shaped region 46 is formed in the upper round-shaped region 46. It is possible to secure the necessary rigidity that is difficult to cause deformation in the upper rounded region 46 and to prevent the input load from the road surface during traveling from concentrating on the upper rounded region 46 toward the roof header 22. . Further, it is possible to prevent peeling of spot welding in the upper round shape region 46 due to the concentrated flow of the load, and the durability can be improved.

  In addition, according to the reinforcing structure of the back door opening according to the embodiment of the present invention, the damper rain 62 forms the round shape region reinforcing member, and thus the damper that absorbs vibration when the back door is opened and closed by the round shape region reinforcing member. By using 28 damper rain, it is possible to prevent the number of parts used for reinforcement from increasing, and it is possible to ensure the necessary rigidity that the upper round-shaped region 46 is unlikely to deform in the upper round-shaped region 46.

  Further, according to the reinforcing structure of the back door opening according to the embodiment of the present invention, the rear pillar rain 36, the rear pillar outer panel 34 and / or the rear pillar inner panel 38 are provided at a plurality of locations along the vehicle side upward direction which is the load transmission direction. Therefore, the input load from the road surface during traveling tends to flow in the load transmission direction indicated by the arrow A on the vehicle side upper side. Therefore, it is possible to prevent the input load from the road surface during traveling from flowing in a concentrated manner in the upper round-shaped region 46 toward the roof header 22.

Next, with reference to FIG. 10, a reinforcing structure of the back door opening in a state in which the rear pillar outer panel is connected to the roof header according to a modification of the embodiment of the present invention will be described.
FIG. 10 is a partially enlarged perspective view showing the structure around the upper corner portion on the right side of the vehicle with the outer panel of the reinforcing structure of the back door opening at the rear of the vehicle body according to a modification of the embodiment of the present invention removed.
Here, in the reinforcing structure of the back door opening in a state where the rear pillar outer panel according to the embodiment of the present invention shown in FIG. 10 is connected to the roof header, the above-described back door opening in a state where the rear pillar outer panel is not connected to the roof header is shown. The same parts as those of the reinforcing structure are denoted by the same reference numerals, description thereof will be omitted, and different parts will be described.

As shown in FIG. 10, the vehicle 81 includes a reinforcing structure 10 that reinforces the back door opening 8 that is opened in a quadrilateral shape toward the passenger compartment when the back door is opened. The reinforcing structure 10 of the vehicle 81 is formed with a pair of left and right upper corner portions 16 that form the upper corner of the back door opening 8.
The reinforcing structure 10 includes a roof header 22 that extends in the vehicle width direction above the back door opening 8, and a pair of left and right rear pillars 82 that extend from the side edge 12 of the back door opening 8 toward the upper corner portion 16. . A roof side rail 30 that extends in the vehicle front-rear direction at the upper side of the vehicle is connected to the upper corner portion 16 of the reinforcing structure 10.

Next, a rear pillar 82 according to a modification of the embodiment of the present invention will be described.
The rear pillar 82 includes a rear pillar outer panel 84 formed on the rear rear outer side of the rear pillar 82, a rear pillar rain 36 formed on the inner side of the rear pillar outer panel 84, and a rear pillar inner panel formed on the inner side of the rear pillar rain 36. 38.
The rear pillar outer panel 84 of the rear pillar 82 extends from the side edge 12 of the back door opening 8 to the vicinity of the upper end of the rear pillar inner panel 38 above the back door opening 8. An upper end portion 84 a of the rear pillar outer panel 84 extends further inward in the vehicle width direction from the damper rain upper lateral edge portion 64 of the damper rain 62. An upper end portion 84 a of the rear pillar outer panel 84 is connected to the closed cross-sectional structure 32 of the roof header 22 of the reinforcing structure 10. At the upper end portion 84a of the rear pillar outer panel 84, the rear pillar outer panel 84, the roof header 22, and the rear pillar inner panel 38 are arranged in this order from the outside of the vehicle body, and are welded by spot welding at predetermined positions. The upper upper end portion 36b of the rear pillar rain 36 is provided so as to be separated from the closed sectional structure 32 of the roof header 22 of the reinforcing structure 10.

  Further, according to the reinforcing structure of the back door opening according to the modification of the embodiment of the present invention, the upper end portion 84a of the rear pillar outer panel 84 is connected to the closed sectional structure 32 of the roof header 22, so that the rear pillar outer panel 84 and the closed section are closed. It is possible to transmit the load to the structure 32 and to further enhance the reinforcement when the back door opening 8 is enlarged, and the closed upper cross-section structure 32 of the upper pillar portion 36b of the rear pillar rain 36 and the roof header 22 is closed. Since the rear pillar rain 36 extends to the vehicle side upper side, the load transmitted to the rear pillar rain 36 out of the input load from the road surface during traveling tends to flow to the vehicle side. Therefore, it is possible to prevent the input load from the road surface during traveling from flowing in a concentrated manner in the upper round-shaped region 46 toward the roof header 22.

DESCRIPTION OF SYMBOLS 1, 81 Vehicle 6 Back door 8 Back door opening part 10 Reinforcement structure 12 Side edge 16 Upper corner part 20 Lower corner part 22 Roof header 24, 82 Rear pillar 28 Damper 32 Closed section structure 34, 84 Rear pillar outer panel 34a, 84a Upper end part 36 Rear pillar rain 36a Upper front end 36b Upper upper end 38 Rear pillar inner panel 44 Rear suspension 46 Upper round shape region 48 Lower round shape region 50 Upper round portion 52 Side edge portion 54 Upper lateral edge portion 56 Lower round portion 58 Lower side edge Part 60 lower side edge part 62 damper rain (reinforcement member, round shape region reinforcement member)
74 Lower round shape region reinforcing member (reinforcing member)

Claims (3)

A rear pillar inner panel provided on a side edge of the back door opening of the vehicle, is connected to the inside of the outer panel formed and the rear of the vehicle provided on a side edge of the back door opening in the vehicle outer side of the rear pillar inner panel A rear pillar outer panel, and a back door opening reinforcing structure in which a rounded region is formed at a corner portion of the back door opening formed by at least a part of the rear pillar,
The rounded region includes a rounded portion forming a rounded corner, a side edge extending from the rounded portion along a side edge of the back door opening, and the back door opening from the rounded portion. A lateral edge extending along the lateral edge of the
And a reinforcing member for reinforcing the rounded region between the rear pillar inner panel and the outer panel, and the reinforcing member extends from the side edge of the rounded region to the lateral edge through the rounded portion. A reinforcing structure for a back door opening, characterized in that an inner edge and an outer edge of the reinforcing member are welded to the rear pillar outer panel at the side edge and the rounded portion of the rounded region .   2. The back door opening according to claim 1, wherein the rounded region is formed in the corner portion at an upper portion of the back door opening, and the reinforcing member is a damper rain of a damper that absorbs vibration when the back door is opened and closed. Reinforcement structure. In the reinforcing member, three plate-like members of the rear pillar outer panel, the rear pillar inner panel, and the reinforcing member are welded together at the inner edge, and the outer panel, the rear pillar outer panel, and the reinforcing member are welded together at the outer edge. The reinforcing structure of the back door opening according to claim 1, wherein the three plate-like members are welded together.

Images