JP2022124050A - Reinforcement structure of back door opening - Google Patents

Abstract

To provide a reinforcement structure which can prevent or reduce deformation of a back door opening caused by resonance without causing significant increase of the weight.SOLUTION: In a reinforcement structure of a back door opening, a rear header 110 includes a roof panel 20 and an outer reinforcement 31 and an inner panel 34, which are combined in a closed cross section shape below the roof panel 20, and is located above a back door opening 1. In the rear header 110, the outer reinforcement 31 includes a shelf part 312 and a cross section hat part 32 which is continuous with a front end of the shelf part 312. A back door hinge 210 is provided at a portion, which is joined to the shelf part 312 in an overlapping manner, of the roof panel 20. The reinforcement structure of the back door opening is provided with a reinforcement member 50 having at least a portion 51 which spans a space between a lower surface of the shelf part 312 located near the back door hinge 210 and a joint part 35 between the outer reinforcement 31 and the inner panel 34 located at the front relative to the lower surface and which closes a lower opening 322 of the cross section hat part 32.SELECTED DRAWING: Figure 5

Description

The present invention relates to a reinforcing structure for a back door opening in a vehicle.

The back door opening of a wagon-type vehicle has a large vertical dimension, and the upper part extends to the vicinity of the roof. Therefore, it is difficult to ensure rigidity against deformation without causing an increase in weight.

For example, Patent Literature 1 discloses a reinforcement structure for a back door opening provided with a reinforcement member having an extension extending over a roof side, a rear pillar, and a rear header.

However, simply providing the reinforcing member as disclosed in Patent Document 1 causes the rear header to sway in the vehicle width direction with respect to the lower portion of the back door opening when it is desired to make the back door opening larger when viewed from the rear of the vehicle. It has been difficult to adequately deal with deformation caused by resonance that occurs during running.

JP 2019-147491 A

SUMMARY OF THE INVENTION It is an object of the present invention to provide a reinforcing structure capable of preventing or reducing deformation of a back door opening due to resonance without causing a significant increase in weight. do.

In order to solve the above problems, the present invention employs the following technical means.

That is, the back door opening reinforcement structure provided by the present invention includes a roof panel, and an outer reinforcement and an inner panel combined in a closed cross-section below the roof panel, and above the back door opening. In the rear header located, the outer reinforcement includes a ledge and a cross-sectional hat portion connected to the front end of the ledge, and a back door hinge is provided at a portion of the roof panel overlapped and joined to the ledge. and spans between the lower surface of the shelf portion located near the back door hinge and the joint portion of the outer reinforcement and the inner panel located forward of the lower surface, and the cross-sectional hat portion A reinforcing member is provided that has at least a portion that closes the lower opening of the.

When the rear header at the upper portion of the back door opening is deformed to swing in the vehicle width direction due to resonance, the cross-sectional hat portion of the outer reinforcement behaves such that the lower opening expands and contracts. In the reinforcing structure for the back door opening having the configuration described above, since the reinforcing member having the portion that closes the opening of the cross-sectional hat portion is provided, it is possible to prevent the lower opening of the cross-sectional hat portion from expanding and contracting. contributes to prevention or reduction of deformation of the back door opening.

In addition, the reinforcing member is connected to the lower surface of the ledge near the back door hinge. The part where the back door hinge is provided is the part where the roof panel and the outer reinforcement are overlapped, and the outer reinforcement rises up to the cross-sectional hat part. It is possible to further enhance the effect of preventing the lower opening from expanding and contracting.

Other features and advantages of the invention will become more apparent from the detailed description that follows with reference to the drawings.

FIG. 2 is a perspective view of the rear part of the vehicle body of the vehicle to which the present invention is applied, viewed obliquely from the rear right, omitting the illustration of the back door; FIG. 2 is a view corresponding to FIG. 1 with the illustration of the roof panel omitted; It is the figure which abbreviate|omitted illustration of the outer reinforcement from FIG. 2 is a cross-sectional view taken along line IV-IV of FIG. 1; FIG. 2 is a cross-sectional view taken along line VV of FIG. 1; FIG.

Preferred embodiments of the present invention will be specifically described below with reference to the drawings. In these figures, fr indicates the front, rr indicates the rear, lh indicates the left side in the vehicle width direction, and rh indicates the right side in the vehicle width direction.

FIG. 1 is a perspective view of the rear part of the vehicle body of a vehicle to which the reinforcement structure A1 for the back door opening according to the present invention is applied, as seen obliquely from the rear right, omitting the illustration of the back door. FIG. 2 is a view corresponding to FIG. 1 with the roof panel 20 omitted. FIG. 3 is a diagram in which illustration of the outer reinforcement 31 is further omitted from FIG. FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. FIG. 5 is a cross-sectional view along line VV of FIG.

As shown in FIGS. 1 to 3, the upper corner portion of the back door opening 1 is surrounded by a portion called a rear header 110 extending in the vehicle width direction and a portion called a rear pillar 120 extending downward from the end of the rear header 110. ing. Furthermore, the end of the rear header 110 is connected to a portion called a roof side 130 extending forward. Therefore, the rear header 110 , the rear pillar 120 and the roof side 130 are connected in a trifurcated shape near the upper corner of the back door opening 1 .

The roof panel 20 constitutes the exterior design of the vehicle. The roof panel 20 is supported by the structural member 3 located inside. The structural member 3 is generally constructed by combining panels into a closed cross-section.

As for the rear header 110, as shown in FIGS. 4 and 5, the structural member 3 is constructed by combining an outer reinforcement 31 and an inner panel 34 in a closed cross section. More specifically, the outer reinforcement 31 has a rear vertical wall portion 311, a shelf portion 312 extending substantially horizontally from the upper end of the rear vertical wall portion 311, and a sectional hat portion 32 connected to the front end of the shelf portion 312. ing. A flange portion 313 is formed at the lower end of the rear vertical wall portion 311, and a front end 321 of the cross-sectional hat portion 32 has a flange shape. The inner panel 34 is concavely curved upward in cross section, and has flanges 341 and 342 at its front and rear ends, respectively. At the rear ends of the outer reinforcement 31 and the inner panel 34, the flanges 313 and 342 are superimposed and joined by, for example, spot welding, and at the front ends thereof, the front end 321 of the sectional hat portion 32 and the flange 341 of the inner panel 34 are joined. are lap-joined by, for example, spot welding.

As shown in FIGS. 4 and 5, the roof panel 20 has a shape along the outer reinforcement 31 in cross section. More specifically, the roof panel 20 includes a flange portion 201 overlapped and joined to the joint portion 36 between the rear end of the outer reinforcement 31 and the rear end of the inner panel 34 , and a vertical wall portion 311 along the rear vertical wall portion 311 of the outer reinforcement 31 . a wall portion 202, a shelf portion 203 (see FIG. 5) that extends substantially horizontally from the upper end of the vertical wall portion 202 and is overlapped and joined to the shelf portion 312 of the outer reinforcement 31, and upward from the front end of the shelf portion 203 It has an extending standing wall portion 204 and a roof appearance design portion 205 extending forward from the upper end of the standing wall portion 204 .

A back door hinge 210 is fixed by welding or a fastening means (not shown) to the overlapping joint between the shelf 203 of the roof panel 20 and the shelf 312 of the outer reinforcement 31 (see FIG. 4). In the illustrated embodiment, a reinforcing member 220 extending in the front-rear direction in a strip shape corresponds to the position of the back door hinge 210 in the vehicle width direction, and the rear end thereof is spot-welded to the lower surface of the shelf 312 of the outer reinforcement 31 or the like. The front end is sandwiched between the front end 321 of the outer reinforcement 31 and the flange portion 341 of the inner panel 34 and joined together.

In the structural member 3 of the rear header 110 having the above configuration, the cross-sectional hat portion 32 is provided on the outer reinforcement 31, thereby increasing the rigidity against the load in the vertical direction. It is possible to maintain the strength that can withstand the load to be applied.

As shown in FIG. 2, the outer reinforcement 31 that constitutes the structural member 3 at the upper corner of the back door opening 1 is formed in a trifurcated shape that branches off from the rear header 110 and integrally extends along the rear pillar 120 and the roof side 130. In this embodiment, the inner panel 34 is also formed in a trifurcated shape corresponding to the outer reinforcement 31, as shown in FIG. Three ends of the trifurcated outer reinforcement 31 are appropriately connected to an outer panel 111 along the rear header 110, an outer panel 121 along the rear pillar 120, and an outer panel 131 along the roof side 130. Furthermore, the three ends of the trifurcated inner panel 34 are also appropriately connected to the inner panel 112 along the rear header 110, the inner panel 122 along the rear pillar 120, and the inner panel 132 along the roof side 130. .

Now, in the present invention, as shown in FIG. and a reinforcing member 50 having at least a portion 51 bridging between the . The portion 51 of the reinforcing member 50 closes the lower opening 322 of the cross-sectional hat 32 portion of the outer reinforcement 31 and is formed of a sheet metal member. The rear end of the reinforcing member 50 is joined to the lower surface of the shelf portion 312 of the outer reinforcement 31 by spot welding or the like. The front end of the reinforcing member 50 is sandwiched and joined between the front end 321 of the outer reinforcement 31 and the flange portion 341 of the inner panel 34 . In this embodiment, as shown in FIGS. 4 and 5, the front-rear direction width of the lower opening 322 of the cross-sectional hat portion 32 of the outer reinforcement 31 increases outward in the vehicle width direction. Correspondingly, as shown in FIG. 2, the reinforcing member 50 has a substantially fan-like shape whose width in the front-rear direction increases toward the outer side in the vehicle width direction. The reinforcing member 50 may be configured to have the portion 51 described above, and may also have a portion (not shown) extending along the rear pillar 120 and a portion (not shown) extending along the roof side 130 .

Next, the operation of the reinforcing structure A1 for the back door opening having the above configuration will be described.

When the rear header 110 at the upper portion of the back door opening 1 is deformed to swing in the vehicle width direction due to resonance during driving, the cross-sectional hat portion 32 of the outer reinforcement 31 expands or contracts the width of the lower opening 322 in the front-rear direction. behavior. In the reinforcing structure A1 for the back door opening having the above configuration, the reinforcing member 50 having the portion 51 that closes the lower opening 322 of the cross-sectional hat portion 32 of the outer reinforcement 31 is provided, so that the lower opening 322 of the cross-sectional hat portion 32 is The expanding and contracting behavior can be prevented, and this can prevent or reduce the deformation of the rear header 110 above the back door opening 1, such as swinging in the vehicle width direction.

In addition, the reinforcing member 50 is connected to the lower surface of the shelf 312 of the outer reinforcement 31 near the back door hinge 210 . The portion where the back door hinge 210 is provided is a portion where the roof panel 20 and the outer reinforcement 31 are overlapped, and the portion where the outer reinforcement 31 rises up from the cross-sectional hat portion 32. Since it is an extremely rigid portion, the reinforcing member 50 is not necessary. The effect of preventing the expansion and contraction behavior of the lower opening 322 of the cross-sectional hat portion 32 can be further enhanced.

Of course, the scope of the present invention is not limited to the above-described embodiments, and all design changes within the scope of matters described in the claims are included in the scope of the present invention.

A1 Backdoor opening reinforcement structure 1 Backdoor opening 110 Rear header 111 Outer panel (of rear header)
112 Inner panel (of rear header)
120 Rear pillar 121 Outer panel (of rear pillar)
122 Inner panel (of rear pillar)
130 Roof side 131 Outer panel (on roof side)
132 Inner panel (roof side)
20 roof panel 201 flange (rear end of roof panel)
202 Vertical wall portion 203 Shelf portion 204 Standing wall portion 205 Roof appearance design portion 210 Back door hinge 220 Reinforcing member (for back door hinge)
3 Structural member 31 Outer reinforcement 311 Rear vertical wall 312 Shelf 313 Flange (at the rear end of the outer reinforcement)
32 cross-section hat portion 321 front end (of cross-section hat portion)
322 lower opening (of cross section hat)
34 Inner panel 341 flange (front end of inner panel)
342 Flange (inner panel rear end)
35 Joint (outer reinforcement front edge and inner panel front edge)
36 Joint (outer reinforcement rear end and inner panel rear end)
50 reinforcing member 51 portion

Claims (1)

In a rear header that includes a roof panel, and an outer reinforcement and an inner panel that are combined to form a closed cross-section below the roof panel, and located above the back door opening,
The outer reinforcement includes a ledge and a sectional hat portion connected to the front end of the ledge,
A back door hinge is provided at the portion of the roof panel overlapped and joined to the shelf,
A lower opening of the cross-sectional hat portion spans between the lower surface of the shelf portion located near the back door hinge and the joint portion of the outer reinforcement and the inner panel located forward of the lower surface, and a lower opening of the cross-sectional hat portion. A reinforcing structure for a back door opening, comprising a reinforcing member having at least a closing portion.

Images