JP3589057B2 - Back door hinge mounting structure - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a structure for mounting a hinge for a back door.
[0002]
[Prior art]
The back door of the vehicle is supported by a hinge attached to the upper end of the rear opening of the vehicle body, and is openable and pivotable about the hinge (see Japanese Utility Model Application Laid-Open No. 63-74377). The upper end of the rear opening of the vehicle body is formed of a roof flange formed stepped down from the rear end of the roof, an upper flange formed stepped down from the rear end of the rear roof rail upper, and a lower flange formed at the rear end of the rear roof rail lower. The joint flange is formed of a single piece, and a hinge is attached to an upper portion of the joint flange. In the hinge mounting region of the joint flange, an embossed portion for increasing the rigidity of the hinge is appropriately formed at a part of the flange constituting the joint flange.
[0003]
[Problems to be solved by the invention]
However, in such a conventional technique, although an embossed portion is appropriately formed on a joining flange forming an upper end of a rear opening of a vehicle body, the hinge is not sufficiently attached, so that the hinge is not attached to the joining flange. It swings around the point in the front-back direction. For this reason, there is a possibility that the back door causes a membrane vibration due to the vibration at the time of running of the vehicle, and a “muffled sound” is generated in the vehicle interior. In addition, since the gap between the upper end of the back door and the rear end of the roof fluctuates, it is difficult to control the size of the gap, and the work of mounting the back door (gap adjustment work) is troublesome. Therefore, as a countermeasure, it is necessary to increase the thickness of each panel constituting the joining flange to increase the rigidity of the joining flange itself, and to increase the attachment rigidity of the hinge attached thereto. Deteriorates press formability.
[0004]
The present invention has been made by paying attention to such a conventional technology, and provides a back door hinge mounting structure capable of improving the hinge mounting rigidity without increasing the thickness of a component panel. is there.
[0005]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a roof flange formed stepwise at a rear end of a roof via a vertical wall, and a vertical wall at a rear end of a rear roof rail upper extending in a vehicle width direction below the rear portion of the roof. A lower flange formed at the rear end of a lower rear roof rail lower extending in the vehicle width direction below the rear roof rail upper to form a joining flange protruding rearward. A hinge for rotatably supporting an upper end of the back door is mounted on an upper portion of the joining flange, wherein an embossed portion is formed at a position where the hinge, which is a position closer to the rear of the upper flange, is attached, and the embossed portion is formed forward from the embossed portion. A plurality of beads along the front-rear direction are arranged side by side in the vehicle width direction, and a reinforcing plate is interposed between the embossed portion and the lower flange.
[0006]
According to the first aspect of the present invention, a plurality of bead portions extending in the front-rear direction from the embossed portion formed at the position where the hinge is located at the rearward position of the upper flange to the front vertical wall are formed in the vehicle width direction. Since they are juxtaposed, the rigidity of the upper flange is improved in front of the embossed portion. That is, in front of the embossed portion, the number of vertical surfaces formed on the side surface of the bead portion is twice as many as that of the bead portion, so that the rigidity of the portion is improved. Further, since the reinforcing plate is provided on the embossed portion on the rear side of the upper flange, the rigidity of this portion is also improved. Therefore, since the rigidity of the upper flange at the portion where the hinge is attached is entirely improved, the attachment rigidity of the hinge attached thereto is improved.
[0007]
According to a second aspect of the present invention, there is provided a roof flange formed stepwise at a rear end of a roof via a vertical wall, and a vertical wall at a rear end of a rear roof rail upper extending in a vehicle width direction below the rear portion of the roof. A lower flange formed at the rear end of a lower rear roof rail lower extending in the vehicle width direction below the rear roof rail upper to form a joining flange protruding rearward. A hinge for rotatably supporting an upper end portion of the back door is mounted on an upper portion of the joining flange, and a portion of the upper flange to which the hinge is attached has at least a length substantially corresponding to a front-rear width of the upper flange. A plurality of beads along the front-rear direction are arranged side by side in the vehicle width direction.
[0008]
According to the second aspect of the present invention, the embossed portion is not formed on the upper flange, and instead, a plurality of bead portions along the front-rear direction having at least a length substantially corresponding to the front-rear width of the upper flange are formed in the vehicle width. The rigidity of the portion where the hinge of the upper flange is attached is entirely improved, and the attachment rigidity of the hinge attached thereto is also improved. Since the reinforcing plate described in the preceding section becomes unnecessary, the number of parts can be reduced.
[0009]
According to a third aspect of the present invention, in addition to the first or second aspect, the bead portion is formed continuously up to the upper end of the vertical wall.
[0010]
According to the third aspect of the present invention, since the bead portion is formed continuously to the upper end of the vertical wall, the rigidity of the upper flange is further improved, and the rigidity of the hinge is accordingly improved.
[0011]
According to a fourth aspect of the present invention, in addition to any one of the first to third aspects, a spot welding point with respect to the lower flange is set in a region sandwiched between the bead portions.
[0012]
According to the invention as set forth in claim 4, since the spot welding point with respect to the lower flange is set in the region sandwiched by the bead portions, the joining strength between the upper flange and the lower flange is increased, the rigidity of the entire joining flange is improved, and the The mounting rigidity is further improved.
[0013]
According to a fifth aspect of the present invention, in addition to the first aspect of the present invention, a reinforcing bracket is joined to a portion of the rear roof rail upper where the hinge is to be attached , from below.
[0014]
According to the fifth aspect of the present invention, since the reinforcing bracket is joined to the portion of the rear roof rail upper corresponding to the hinge from below, the peripheral rigidity of the hinge mounting portion is improved, and the hinge mounting rigidity is further improved. I do.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
[0016]
1 to 5 are views showing a first embodiment of the present invention. FIG. 1 is a diagram showing a rear portion of an automobile, and 1 is a back door. The back door 1 can be freely opened upward, and luggage and the like can be put in and out of a luggage room formed behind the vehicle body. The upper end of the back door 1 is rotatably attached to a hinge 2 attached to the upper end of the rear opening of the vehicle body. The hinge 2 is attached to the upper surface of a joint flange 3 formed rearward at the upper end of the rear opening of the vehicle body. A slight gap S is formed between the upper end of the attached back door 1 and the rear end of the roof 4.
[0017]
A rear roof rail 5 having a closed cross section is formed along the vehicle width direction above the rear opening of the vehicle body, and both left and right ends thereof are welded to the upper end of a rear pillar inner 6. The rear end of the member 7 constituting the side roof rail is also welded to the upper end of the rear pillar inner 6.
[0018]
The rear roof rail 5 includes a rear roof rail upper 8 extending below the rear portion of the roof 4 in the vehicle width direction, and a rear roof rail lower 9 extending below the rear roof rail upper 8 in the vehicle width direction. Inside the rear roof rail 5 having the closed cross section, a reinforcing bracket 10 having an inverted hat-shaped cross section is welded in advance to the lower surface of the rear roof rail upper 8 corresponding to the hinge 2. An upper flange 12 is formed at the rear end of the rear roof rail upper 8 via a vertical wall 11 so as to be lowered. A lower flange 13 is formed at the rear end of the lower roof rail lower 9 and is welded to the upper flange 12. The roof 4 located above the rear roof rail 5 also has a roof flange 15 stepped down at the rear end via a vertical wall 14, and the roof flange 15 is further placed above the joint between the upper flange 12 and the lower flange 13. The joining flange 3 is formed by welding.
[0019]
A weather strip 16 is attached to the end of the roof flange 15 that forms the uppermost portion of the joining flange 3, and a roof trim 17 that abuts the rear end of the weather strip 16 below the joining flange 3. It is attached by clip means (not shown).
[0020]
Next, the structure of the joining flange 3 will be described in detail. Embossed portions 18, 19, 20 are formed on the roof flange 15, the upper flange 12, and the lower flange 13 at portions where the hinge 2 is attached. The embossed portion 18 of the roof flange 15 is formed over the front-rear width of the roof flange 15, and the embossed portions 19 and 20 of the upper flange 12 and the lower flange 13 are formed at rearward positions, respectively. Each of the embossed portions 18, 19, and 20 has a mounting hole 21 for mounting the hinge 2.
[0021]
From the embossed portion 19 of the upper flange 12, two bead portions 22 having the same upper surface as the embossed portion 19 are formed from both right and left sides of the embossed portion 19 toward the front side. The bead portion 22 is formed continuously up to the upper surface of the rear roof rail upper 8 via the vertical wall 11. A spot welding point P for joining the upper flange 12 and the lower flange 13 is provided in a region between the right and left bead portions 22.
[0022]
Further, a plurality of other bead portions 23 are formed at predetermined intervals on the inner side in the vehicle width direction of the embossed portion 19. The bead portion 23 is formed continuously from a position in the middle of the upper flange 12 to the upper surface of the rear roof rail upper 8 via the vertical wall 11. The other bead portion 23 is formed in the vehicle width direction in order to increase the overall rigidity of the upper flange 12.
[0023]
A rectangular reinforcing plate 24 is interposed between the embossed portion 19 of the upper flange 12 and the embossed portion 20 of the lower flange 13, and a mounting hole 21 similar to the embossed portion 19 is formed. The reinforcing plate 24 is welded together when joining the upper flange 12 and the lower flange 13.
[0024]
A welding nut 25 is previously attached to the lower surface of the embossed portion 20 of the lower flange 13, and a bolt 26 passed from the hinge 2 placed on the upper surface of the embossed portion 18 of the roof flange 15 is screwed into the weld nut 25. The hinge 2 is brought into a mounted state by fastening the bolt 26 with a tool (not shown).
[0025]
According to this embodiment, the embossed portion 19 is formed at a position near the rear of the upper flange 12, and the reinforcing plate 24 is provided at a portion corresponding to the embossed portion 19. Is improved. Also, since two bead portions 22 are formed on the front side of the upper flange 12 in the front-rear direction, the number of the vertical surfaces 22 a formed on the side surfaces of the bead portion 22 is twice the number of the bead portions 22. Because of the presence, the rigidity of the front side of the embossed portion 19 is also improved. Therefore, since the rigidity of the portion of the upper flange 12 corresponding to the hinge 2 ( the portion where the hinge is attached) is entirely improved, the attachment rigidity of the hinge 2 attached thereto is improved. In particular, since the bead portion 22 is formed to have a length extending from the vertical wall 11 to the upper surface of the rear roof rail upper 8, peripheral rigidity of a portion where the hinge 2 is attached to the upper flange 12 is improved as a whole. Further, since the spot welding point P with respect to the lower flange 13 is set in a region sandwiched between the bead portions 22, the joining strength between the upper flange 12 and the lower flange 13 is increased, the rigidity of the entire joining flange 3 is improved, and the hinge 2 is mounted. The rigidity is further improved. Further, since the reinforcing bracket 10 is joined to the portion corresponding to the hinge 2 of the rear roof rail upper 8 from below, the rigidity around the portion where the hinge 2 is mounted is improved, and the mounting rigidity of the hinge 2 is further improved. Therefore, the hinge 2 does not swing in the front-rear direction around the mounting point by the bolt 26, and the back door 1 does not cause film vibration even if it is subjected to vibration during traveling of the vehicle. Does not occur. Further, since the gap S between the upper end of the back door 1 and the rear end of the roof 4 is constant, the dimensional control of the gap S is easy, and the workability of mounting the back door 1 is improved.
[0026]
6 and 7 are views showing a second embodiment of the present invention. It is to be noted that the same parts as those in the above embodiment are denoted by the same reference numerals, and redundant description will be omitted. In this embodiment, instead of forming an “embossed portion” on the upper flange 27, the portion where the hinge of the upper flange 27 is attached not only corresponds to the front-rear width of the upper flange 27 but also passes through the rear roof rail via the vertical wall 28 as it is. Three bead portions 30 reaching the upper surface of the upper 29 are juxtaposed in the vehicle width direction. Also, the “reinforcement plate” of the previous embodiment is omitted. A mounting hole 21 and a spot welding point P are provided in a region between the beads 30.
[0027]
According to this embodiment, since the bead portion 30 is formed over the front-rear width of the upper flange 27, the vertical surface 30a of the bead portion 30 exists even at a position closer to the rear of the upper flange 27, and the "embossed portion" ), The rigidity of the portion where the hinge is attached is improved entirely. Therefore, the attachment rigidity of the hinge attached thereto is improved. Further, since the "reinforcement plate" as described in the above embodiment is not required, the number of parts can be reduced.
[0028]
【The invention's effect】
According to the present invention, a plurality of bead portions extending in the front-rear direction are arranged side by side in the vehicle width direction from the embossed portion formed at the position where the hinge, which is the rearward position of the upper flange , is attached to the front vertical wall. Therefore, the rigidity of the upper flange is improved in front of the embossed portion. That is, in front of the embossed portion, the number of vertical surfaces formed on the side surface of the bead portion is twice as many as that of the bead portion, so that the rigidity of the portion is improved. Further, since the reinforcing plate is provided on the embossed portion on the rear side of the upper flange, the rigidity of this portion is also improved. Therefore, since the rigidity of the upper flange at the portion where the hinge is attached is entirely improved, the attachment rigidity of the hinge attached thereto is improved.
[0029]
According to another invention, an embossed portion is not formed in the upper flange, and instead, a plurality of bead portions along the front-rear direction having at least a length substantially corresponding to the front-rear width of the upper flange are arranged in the vehicle width direction. With this arrangement, the rigidity of the portion of the upper flange to which the hinge is attached is entirely improved, and the attachment rigidity of the hinge attached thereto is also improved. Since the reinforcing plate described in the preceding section becomes unnecessary, the number of parts can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view of a rear portion of an automobile showing a back door according to a first embodiment of the present invention.
FIG. 2 is a sectional view taken along the line SA-SA shown in FIG.
FIG. 3 is an exploded perspective view showing a mounting structure of the back door.
FIG. 4 is a plan view showing a mounting portion of a hinge.
FIG. 5 is a sectional view taken along the line SB-SB shown in FIG. 4;
FIG. 6 is a perspective view showing an upper flange and a lower flange according to a second embodiment of the present invention.
FIG. 7 is a sectional view taken along the line SC-SC shown in FIG. 6;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Back door 2 Hinge 3 Joining flange 4 Roof 5 Rear roof rail 8, 29 Rear roof rail upper 9 Rear roof rail lower 10 Reinforcement bracket 11, 14, 28 Vertical wall 12, 27 Upper flange 13 Lower flange 15 Roof flange 18, 19, 20 Embossed part 22, 30 Bead portion 22a, 30a Vertical surface 24 Reinforcement plate S Gap P Spot welding point

Claims (5)

A roof flange formed stepwise through a vertical wall at the rear end of the roof, and an upper flange formed stepwise through the vertical wall at the rear end of a rear roof rail upper extending below the roof rear portion in the vehicle width direction. And a lower flange formed at a rear end of a lower rear roof rail extending in a vehicle width direction below the rear roof rail upper to form a bonding flange protruding rearward. A structure for attaching a hinge for rotatably supporting the upper end portion,
An embossed portion is formed at a position where the hinge, which is a rearward position of the upper flange, is attached , and a plurality of beads extending along the front-rear direction from the embossed portion to the front vertical wall are arranged side by side in the vehicle width direction. A mounting structure for a hinge for a back door, wherein a reinforcing plate is interposed between the lower flange and the lower flange. A roof flange formed stepwise through a vertical wall at the rear end of the roof, and an upper flange formed stepwise through the vertical wall at the rear end of a rear roof rail upper extending below the roof rear portion in the vehicle width direction. And a lower flange formed at a rear end of a lower rear roof rail extending in a vehicle width direction below the rear roof rail upper to form a bonding flange protruding rearward. A structure for attaching a hinge for rotatably supporting the upper end portion,
A plurality of bead portions along the front-rear direction having at least a length substantially corresponding to the front-rear width of the upper flange are provided side by side in the vehicle width direction at a portion where the hinge of the upper flange is attached . Hinge mounting structure. 3. The mounting structure for a hinge for a back door according to claim 1, wherein the bead portion is formed continuously to the upper end of the vertical wall. The hinge mounting structure for a back door according to any one of claims 1 to 3, wherein a spot welding point with respect to the lower flange is set in a region sandwiched between the bead portions. The mounting structure for a hinge for a back door according to any one of claims 1 to 4, wherein a reinforcing bracket is joined to a portion corresponding to the hinge of the rear roof rail upper from below.

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