JP2018176925A - Back door opening part structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent twist deformation of a back door opening part by concentrating loading weight providing an effect on deformation of the back door opening part to a ridgeline part of an inner panel reinforced with a reinforce.SOLUTION: There is provided a back door opening part structure of a vehicle, in which a back door opening part 1 is formed with a vehicle body panel comprising an inner panel 3 having a projecting part 30 projecting inside of a vehicular room, and a convex shape ridgeline 30A formed on the inner panel 3 extends from an upper part to a lower part of the back door opening part 1. A reinforce 7 is provided along the ridgeline 30A on backside of the inner panel 3 on which the projecting part 30 is provided within an area of an upper curve part 1a where the ridgeline 30A shifts from vehicle vertical direction to vehicle width direction. The reinforce 7 comprises a joint part 7a for the inner panel 3 at a site overlapping with the ridgeline 30A.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a back door opening structure of a vehicle.

The back of the hatchback type vehicle is provided with a back door opening which is opened and closed by a back door. Since such a back door opening is formed of a vehicle body panel arranged to surround the back door having a large area, the rigidity around the back door opening is reduced. Therefore, for the back door opening structure of the vehicle, it is required to prevent the deformation of the back door opening.
By the way, as a load that affects the deformation of the back door opening, there is a road surface load based on the vibration transmitted from the road surface via the rear wheel. Generally, the back door opening is located rearward of the rear wheel than the vehicle. Therefore, when analyzing and simulating the state of deformation of the back door opening affected by the road load applied from the front side of the vehicle (inside the vehicle compartment), among the closed cross sections formed by the outer panel and the inner panel, the inner panel It is confirmed that the load is concentrated on the convex surface (in particular, the R-shaped portion transitioning from the vertical direction to the horizontal direction), and the reinforcement of this portion is effective for preventing the deformation of the back door opening.

However, particularly at the upper part of the back door opening, a large-sized reinforcing member is provided between the outer panel and the inner panel in order to make the exterior design complicated and to ensure the vehicle interior length and the vehicle interior width. It is becoming difficult.
Therefore, among conventional vehicles, there is a car body structure that secures a necessary rigidity against road load by forming a ridge line across the back door opening side and the upper side corner. (See, for example, Patent Document 1).

JP, 2012-91638, A

  However, in the above-described conventional vehicle body structure, since the ridgeline portion is not reinforced, there is a problem that the torsional deformation of the back door opening can not be prevented when the road load is concentrated.

  The present invention has been made in view of such a situation, and the purpose thereof is to concentrate the load affecting the deformation of the back door opening on the ridge line portion of the reinforcement reinforced inner panel. An object of the present invention is to provide a back door opening structure of a vehicle capable of preventing torsional deformation of the back door opening.

  In order to solve the problems of the above-mentioned prior art, according to the present invention, a back door opening is formed by a vehicle body panel provided with an inner panel having a convex portion projecting toward the vehicle interior, and the convex formed in the inner panel In the back door opening structure of a vehicle in which the ridge line extends from the upper portion to the lower portion of the back door opening portion, the convex portion within the range of the curved portion where the ridge line shifts from the vehicle vertical direction to the vehicle width direction A reinforcement is provided along the ridgeline on the back surface side of the inner panel where is located, and the reinforcement has a joint with the inner panel at a location straddling the ridgeline.

As described above, in the back door opening structure of the vehicle according to the present invention, the back door opening is formed by the vehicle body panel provided with the inner panel having the convex portion protruding toward the vehicle interior, and the back door opening is formed in the inner panel A convex ridge line extends from the upper portion to the lower portion of the back door opening, and the convex portion is located within the range of a curved portion where the ridge line shifts from the vehicle vertical direction to the vehicle width direction. On the back surface side, reinforcement is provided along the ridgeline, and the reinforcement has a junction with the inner panel at a location straddling the ridgeline.
Therefore, in the back door opening structure of the vehicle according to the present invention, the load load affecting the deformation of the back door opening is concentrated on the ridge line portion of the inner panel, and the ridge line portion carries the load load together. Therefore, by providing reinforcement at the corresponding portion of the ridge line portion of the inner panel and reinforcing it with pinpoints, it is possible to effectively prevent the collapse and spread of the ridge line portion and to prevent the torsional deformation of the back door opening.

FIG. 1 is a front view of a back door opening of a vehicle to which a structure according to an embodiment of the present invention is applied, as viewed from the vehicle front side in a vehicle compartment. It is a perspective view which expands and shows the inner panel of the Z section in FIG. 1, and its peripheral part. FIG. 3 is a perspective view showing a state in which reinforcement is provided by removing a part of the inner panel in FIG. 2; It is the sectional view on the AA line in FIG. FIG. 3 is a perspective view of a state where reinforcement is attached by removing a part of the inner panel in FIG. 2 as viewed from the side of the vehicle. It is sectional drawing which shows the reinforcement in FIG. 5, and its peripheral part.

Hereinafter, the present invention will be described in detail based on the illustrated embodiments.
1 to 6 show a back door opening structure of a vehicle according to an embodiment of the present invention. In the drawings, the arrow X direction indicates the vehicle vertical direction, and the arrow Y direction indicates the vehicle width direction.

The vehicle to which the back door opening structure according to the embodiment of the present invention is applied is a hatchback type automobile provided with a back door (not shown), and the vehicle rear is shown in FIGS. 1 to 3. As such, a back door opening 1 is provided which is opened and closed by a back door (not shown). The back door opening 1 includes a side body outer panel 2 provided outside the vehicle, an inner panel 3 provided inside the vehicle, a back door hinge reinforcement 4, a roof back member 5, a tail end member 6, etc. A portion is formed by a body panel joined by welding or the like.
Among such vehicle body panels, the inner panel 3 is located on the left and right sides of the back door opening 1, and is a quarter inner upper extension 31, a quarter inner upper panel 32, and a quarter inner lower panel disposed along the vehicle vertical direction. It has 33. Quarter inner upper extension 31 is disposed at upper curved portion 1 a located at the upper corner portion of back door opening 1, and quarter inner lower panel 33 is disposed at lower curved portion 1 b located at the lower corner portion of back door opening 1. It is done. Further, the back door hinge reinforcement 4 and the roof back member 5 are located at the upper part of the back door opening 1 and arranged along the vehicle width direction. Furthermore, the tail end member 6 is located below the back door opening 1 and is disposed along the vehicle width direction.

  The inner panel 3 according to the present embodiment, as shown in FIGS. 1 to 6, has a convex portion 30 projecting to the vehicle interior side, and the convex portion 30 corresponds to an intermediate portion in the vehicle width direction of the inner panel 3. By being bent to the side opposite to the side body outer panel 2, it is formed along the side of the back door opening 1 which is the longitudinal direction of the inner panel 3. Further, on the inner panel 3, convex ridges 30 </ b> A smoothly formed at positions corresponding to the tops of the convex portions 30 are continuously disposed while extending from the upper portion to the lower portion of the back door opening 1.

  Within the range of the upper curved portion 1a where the ridgeline 30A of the inner panel 3 of the present embodiment is shifted in the vehicle width direction from the vehicle vertical direction, on the back side of the inner panel 3 (quarter inner upper extension 31) As shown in FIG. 3, FIG. 4 and FIG. 6, reinforcement 7 having a predetermined length and width is provided along the ridgeline 30A, and the reinforcement 7 has a curve corresponding to the ridgeline 30A as a whole. It is formed in shape. The reinforcement 7 is a member for reinforcing the portion of the ridge line 30A of the inner panel 3 and concentrates the load, which affects the deformation of the back door opening 1, on the portion of the ridge line 30A of the inner panel 3. It is provided in order to be able to

The reinforcement 7 of the present embodiment, as shown in FIGS. 4 and 6, has joints 7a with the inner panel 3 at the left and right sides across the ridgeline 30A, and these joints 7a The reinforcement 7 is fixed to the back surface of the inner panel 3 by joining the panel 3 by welding or the like. These joint portions 7 a are provided along the longitudinal direction on the left and right sides of the widthwise middle portion of the reinforcement 7 and are bent in a flange shape so as to be superimposed on the back surface of the inner panel 3. Moreover, the reinforcement 7 is provided to bridge the ridges 30A across the ridgeline 30A, and is joined in the vicinity of the curved end of the ridgeline 30A, and linearly supported across the ridgeline 30A. It is configured to Therefore, the reinforcement 7 has a width that allows the entire ridge 30 to be bridged across the ridge 30A, and has a width that allows the joint 7a to be joined to the inner panel 3. doing.
Further, the portion located behind the ridgeline 30A and where the reinforcement 7 is joined to the inner panel 3 is formed in a strong closed cross-sectional shape, and this closed cross-sectional shape corresponds to the convex portion 30 of the inner panel 3 and the phosphorus The widthwise middle portion of the force 7 has a substantially triangular shape.

  Furthermore, as shown in FIG. 2 and FIG. 3, at least one piece which does not extend to the ridgeline 30A is a surface 30B of the inner panel 3 facing the vehicle rear from the ridgeline 30A and does not overlap the ridgeline 30A. In the embodiment, two through holes 8 are provided at an interval in the vehicle vertical direction. The through hole 8 reduces the surface bearing the load load from the road surface and the like in the ridge line 30A formed smoothly and connected, reduces the load load on the ridge line 30A, and reinforces the reinforcement 7 It is provided for maximum performance.

On the other hand, as shown in FIG. 6, at a side portion of the longitudinal end of reinforcement 7, it is joined with a back door hinge reinforcement 4 (or roof back member 5) which is a vehicle body configuration panel different from the inner panel 3. A junction 9 is provided. By thus making the reinforcement 7 and the junction point 9 close to each other, the load applied from another vehicle body construction panel is also concentrated on the inner panel 3 and the reinforcement 7, and the reinforcement effect of the reinforcement 7 is maximized. Can be used to
The joint point 9 between the inner panel 3 and the back door hinge reinforcement 4 may be provided only on one side of the longitudinal end of the reinforcement 7 or may be provided on both sides. In addition, the junction point 9 may be a junction point not only with one vehicle body configuration panel but also with a plurality of vehicle body configuration panels (for example, the back door hinge reinforcement 4 and the roof back member 5). In the vicinity of the upper curved portion 1a, the load is concentrated on the smoothly formed ridge 30A including the load received by the vehicle body configuration panel.
The inner panel 3 and the back door hinge reinforcement 4 are joined to a member connected to the roof at an upper portion of the back door opening 1. Therefore, the joint point 9 may be a joint by welding or a joint by fastening of a bolt and a nut, and the same effect can be obtained.

As described above, in the back door opening structure of the vehicle according to the embodiment of the present invention, the back door opening 1 is formed by the vehicle body panel provided with the inner panel 3 having the convex portion 30 projecting to the vehicle interior side. A convex ridge 30 </ b> A formed on the panel 3 extends from the top to the bottom of the back door opening 1. Moreover, of the curved portions 1a and 1b where the ridge line 30A shifts in the vehicle width direction from the vehicle vertical direction, the ridge line 30A is on the back surface side of the inner panel 3 where the convex portion 30 is located within the range of the upper curved portion 1a. A reinforcement 7 is provided along the length, and the reinforcement 7 has a joint 7a with the inner panel 3 at a location straddling the ridgeline 30A.
Therefore, in the back door opening structure of the present embodiment, the load from the road surface or the like affecting the torsional deformation of the back door opening 1 concentrates on the ridge 30A of the inner panel 3 and the ridge 30A Since the load is to be carried together, the reinforcements 7 reinforced with pinpoints are provided behind the projections 30 corresponding to the ridges 30A of the inner panel 3 so that the ridges 30A are crushed or spread. Can be prevented, and torsional deformation of the back door opening 1 can be effectively prevented.

  Further, in the back door opening structure of the present embodiment, the reinforcement 7 is provided so as to bridge the ridges 30 with the ridgeline 30A interposed therebetween, and is joined near the curved end of the ridgeline 30A As a result, a strong closed cross section consisting of the inner panel 3 and the reinforcement 7 is formed behind the ridgeline 30A, and the twist deformation prevention of the back door opening 1 can be further strengthened. Since a part of the ridgeline 30A collapses or spreads, it leads to a torsional deformation of the back door opening 1, so a structure that provides reinforcement 7 as small as possible on the back side of the ridgeline 30A and linearly supporting sandwiching the ridgeline 30A is provided. The

Furthermore, in the back door opening structure according to the present embodiment, since the through holes 8 are provided on the surface 30B of the inner panel 3 facing the vehicle rear from the ridge line 30A and not overlapping the ridge line 30A, the ridge line In 30A and its vicinity, the surface bearing the load from the road surface can be reduced, load concentration on the convex part 30 and ridgeline 30A can easily occur, and the reinforcement effect of the reinforcement 7 can be maximized. it can.
By the way, there is considered a method of preventing torsional deformation in which the load is dispersed due to the presence of the surface. However, the back door opening structure of the present embodiment is an optimal reinforcement even in the case where there is a design limitation on the exterior of the back door opening 1 and it is difficult for the inner panel 3 to expand indoors as well. Since the method is assumed, it is necessary to disperse the load due to the presence of a surface, and to prevent the origin of deformation from being created in another part. Therefore, by reducing the surface, it is easy to concentrate the load from the road surface etc. on ridge line 30A formed smoothly, the reinforcement effect of reinforcement 7 is maximized, and the back door opening that suppresses the deformation of the peripheral part It is considered as the twist deformation prevention structure of 1.

  Further, in the back door opening structure of the present embodiment, a junction point 9 joined to the back door hinge reinforcement 4 which is a vehicle body constituting panel different from the inner panel 3 at a side location of the longitudinal direction end of the reinforcement 7. As a result, the load applied from another vehicle body construction panel can be concentrated on the inner panel 3 and the reinforcement 7, and the reinforcement effect by the reinforcement 7 can be maximally exhibited.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications and changes are possible based on the technical idea of the present invention.

  For example, in the back door opening structure of the vehicle in the embodiment described above, the convex portion 30 is positioned within the range of the upper curved portion 1a where the ridge line 30A of the inner panel 3 is shifted from the vehicle vertical direction to the vehicle width direction. The reinforcement 7 is provided along the ridgeline 30A on the back surface side of the inner panel 3, but within the range of the lower curved portion 1b where the ridgeline 30A of the inner panel 3 shifts in the vehicle width direction from the vehicle vertical direction Even if reinforcement 7 is provided along the ridgeline 30A on the back surface side of the inner panel 3 (quarter inner lower panel 33) where 30 is located, the same effect can be obtained. However, due to the construction of the body panel, the upper part of the back door opening 1 is required to have a complex shape and a sharp shape in terms of exterior design, and the interior of the vehicle interior needs to have a large indoor space. There is a demand to avoid the problem, and it has become a difficult place to arrange a large reinforcing member between the inner panel 3 and the vehicle body configuration panel such as the back door hinge reinforcement 4 or the like. Therefore, it is more preferable to apply the back door opening structure in embodiment as stated above to the upper part of the back door opening 1. As shown in FIG.

Reference Signs List 1 back door opening 1a upper curved portion 1b lower curved portion 2 side body outer panel 3 inner panel 4 back door hinge reinforcement 5 roof back member 6 tail end member 7 reinforcement 7 a joint 8 through hole 9 joint 30 convex 30A ridge 30B Vehicle Rear Face 31 Quarter Inner Upper Extension 32 Quarter Inner Upper Panel 33 Quarter Inner Lower Panel

Claims (4)

A back door opening is formed by a vehicle body panel provided with an inner panel having a convex portion projecting to the vehicle interior side, and a convex ridge formed on the inner panel extends from the top to the bottom of the back door opening. In the back door opening structure of the
A reinforcement is provided along the ridgeline on the back surface side of the inner panel where the convex portion is located within a range of a curved portion where the ridgeline shifts in the vehicle width direction from the vertical direction of the vehicle.
The back door opening structure of a vehicle, wherein the reinforcement has a joint with the inner panel at a location straddling the ridge line.   The vehicle according to claim 1, wherein the reinforcement is provided so as to bridge the ridges with the ridge line interposed therebetween, and is joined in the vicinity of the curved end of the ridge line. Back door opening structure.   The back door of the vehicle according to claim 1 or 2, wherein a through hole is provided in a surface of the inner panel facing the rear of the vehicle from the ridge line and not overlapping the ridge line. Opening structure.   The vehicle according to any one of claims 1 to 3, wherein a junction point joined to a vehicle body configuration panel other than the inner panel is provided at a side portion of a longitudinal end of the reinforcement. Back door opening structure.

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