JPH0132613Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to the structure of the upper part of a back door opening in an automobile body, and relates to a structure in which rigidity is increased without deteriorating the appearance from the passenger compartment or complicating the welding process.

[Conventional technology]

The upper part of the back door opening on the body of a car with a back door serves as a support frame for the rear edge of the roof.
Since it plays the role of a back door support frame, a certain degree of rigidity is required. The structure of the conventional general back door opening is as follows:
As shown in FIG. 5, on the inside of the rear edge of roof panel a, inner panel b and outer panel c
Atsupa frame d, which has a box cross section, is formed by polymerizing and welding both the front and rear edges, and roof panel a is attached to this.
The rear edge of the was welded. and roof panel a
A reinforcement g
is provided. This structure is derived from the roof side support structure, and the inner panel b and the outer panel c are welded to the roof rail inner panel and the roof rail outer panel through a quarter panel at the rear corner of the roof, respectively.

[Problem that the invention attempts to solve]

By the way, in the above-mentioned conventional structure of the upper part of the back door opening, an upper frame d having a box-shaped cross section consisting of an inner panel b and an outer panel c is further arranged inside the roof panel a, so that the rear edge of the roof is 3 It has a complex structure with heavy panels.
The welding process is complicated and increases the weight of the vehicle. Furthermore, since the Atsupah frame d protrudes into the vehicle interior, there is also the problem that it compresses the upper space at the rear of the vehicle interior. Furthermore, due to the formation of the Atsupah frame d, it is inevitable that the flange-like joint h between the inner panel b and the outer panel c protrudes into the vehicle interior. It is necessary to add a trim to cover part h, which increases the number of parts and makes the structure of this part more complicated. This idea was devised under the circumstances mentioned above, and was designed to reduce the weight of the car body, simplify the assembly and welding process, and expand the upper space at the rear of the cabin compared to conventional structures. The object of the present invention is to provide a new structure for the upper part of a back door opening which has a simple structure and can maintain the same rigidity as the conventional one.

[Means to solve the problem]

In order to solve the above problem, the present invention takes the following technical measures. That is, the roof is formed by overlappingly welding the side edges of the main roof panel that forms the center of the roof to the inner edges of the sub-roof panels that form the side parts of the roof, while the inner edges of the sub-roof panels that form the side parts of the roof are welded together to form a roof. Position the inner edge of the roof side rail inner panel so that it roughly corresponds to the inner edge of the roof side rail, and overlap-weld the side edge of the Atsupa frame that overlaps the lower side of the rear edge of the roof to the inner edge of this roof side rail inner panel. In the structure of the upper part of the back door opening of the vehicle body in which the rear edge of the upper frame is welded to the rear edge of the roof, the main roof panel and the secondary roof panel overlap in the space between the roof and the upper frame. The upper part is overlapped and welded to the welded part,
In addition, a reinforcing partition plate is provided, the lower part of which is overlapped and welded to the welded portion of the roof side rail inner panel and Atsupa frame.

[Effect]

The trailing edge of the roof is usually stepped down to provide a back door hinge, so the moment of inertia of this roof trailing edge with respect to the horizontal neutral plane is quite large; An Atsupa frame whose rear edge is welded to the rear edge of the roof is placed inside the section, so if the inner edge of this Atsupa frame is raised up in an L-shape, for example, the Atsupa frame including this Atsupa frame can be The moment of inertia of the trailing edge of the roof becomes even larger. Moreover, in the present invention, a reinforcing partition plate is provided in the space between the rear edge of the roof and the Atsupa frame, and the upper and lower sides are connected to the roof and Atsupa frame, respectively, so that the roof and Atsupa frame are different from those in the conventional case. Although it does not form a closed box cross-sectional structure like
The mutual positional relationship between the two in the vertical direction is defined by the reinforcing partition plate. Therefore, the rigidity of the structure of the upper part of the back door opening, which is composed of the rear edge of the roof and the upper frame as a whole, is further improved. In addition, the partition reinforcing plate is welded at the upper part using the overlapping welding part of the main roof panel and the sub-roof panel, and the lower part is welded together using the welding part between the roof side rail inner panel and the Atsupa frame. Since it is provided by overlap welding, there is no need to set new spot welding points for welding this partition reinforcing plate. Furthermore, in the structure of the upper part of the back door opening of the present invention, unlike the conventional structure in which an atspa frame is further provided on the inner surface of the roof with a box cross-section formed by an inner panel and an outer panel, the inner surface of the roof has a predetermined cross-section. Since only a plate-shaped upper frame is provided, the amount of bulge of the upper frame into the interior of the vehicle can be kept small, which increases the cabin space and reduces the weight of the vehicle. Furthermore, since the end can be processed by bending the inner edge of the Atsupa frame, the appearance of the vehicle interior will not deteriorate even if no trim is attached.

【effect】

From the above, the structure of the upper part of the back door opening of the present invention is simplified, and while maintaining sufficient rigidity, it simultaneously achieves weight reduction, simplification of the assembly process, and expansion of vehicle interior space. be able to.

[Explanation of Examples]

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 4. Fig. 1 is a rear perspective view of an automobile in which the structure of the present invention is adopted, Fig. 2 is a partially cutaway enlarged sectional perspective view of the area circled in Fig.
FIG. 4 is a sectional view taken along the line - in FIG. 3; FIG. 4 is a sectional view taken along the line - in FIG. The roof 1 has an inner edge 31 of a sub-roof panel 3 that curves and extends from the quarter 2 to the roof side.
The left and right edges 41 of the main roof panel 4 constituting the central portion of the roof are formed by welding together. The rear edge 1 of the roof 1 thus formed
As clearly shown in FIG. 3, a is a back door 5 that continues rearward flush with the general surface 1b of the roof.
In order to attach a hinge 6 for supporting the holder so that it can be opened and closed up and down, it extends rearward by being slightly stepped down from the general surface 1b. A channel portion 7 that opens upward is further bent and formed on the rear edge portion 1a of the roof, and a rear standing wall 7a of the channel portion 7 is provided for tightly contacting the back door inner 51 and sealing the door opening 8. A weather strip 9 is attached. As shown in FIG. 4, the overlapping welded part 10 between the sub-roof panel 3 and the main roof panel 4 extends in the front-rear direction by stepping down the edges 31 and 41 of both roof panels. Concave groove 1
It will be formed within 1. In this way, spot dents in the polymerized welded portion 10 are difficult to visually recognize from the outside. Normally, a molding 12 is further fitted into this groove 11 to give the roof its appearance. However, the standing wall portion 1c or the rear edge portion 1a for stepping down the rear edge portion 1a of the roof.
are not exposed to the outside when the back door 5 is closed, so they are simply attached to the sub roof panel 3 and the main roof panel 4.
The edges are simply welded together. On the other hand, on the inside of the auxiliary roof panel 3, as clearly shown in FIG. 4, there is located a quarter inner panel 13 that constitutes the rear inner wall of the passenger compartment or a roof side rail inner panel 13' that continues forward from this, Inner edge 1 near the back door opening of this
3a extends to a position that substantially corresponds to the inner edge 31 of the secondary roof panel 3, and its rear edge is polymerized and welded to the rear edge 32 of the secondary roof panel 3 on the lower surface of the channel portion 7. There is. As shown in FIG. 3, on the inner edge 13a of the roof side rail inner panel, a rising portion 14a is formed at a predetermined distance from the standing wall portion 1c of the roof 1, and is inclined slightly downward. Channel part 7 at the rear edge of the roof
Both end portions 14b of the upper frame 14, which has a substantially horizontal J-shaped cross-sectional shape extending to the lower surface of the upper frame 14, are welded together. Note that the rear edge portion 14c of this Atsupa frame 14 is connected to the channel portion 7 of the roof rear edge, similar to the roof side rail inner panel 13'.
is welded to the bottom surface of the In this way, as shown in FIG. 3, the upper part of the back door opening has a stepped roof 1 having three step sections: the general surface 1b, the vertical wall section 1c, and the lower surface of the channel section 7. The upper frame 14 extending from the front rising portion 14a of the standing wall portion 1c to the lower surface of the channel portion 7 forms a substantially closed box cross-sectional structure portion A. Furthermore, in the present invention, the upper part 15a is overlap-welded to the back side of the overlapping welded part 10 of the sub-roof panel 3 and the main roof panel 4 of the roof 1, and the roof side rail inner panel 13' and the upper frame 14 are welded together. The polymerization weld 16 of the lower part 15
A partition reinforcing plate 15 to which b is overlap welded is provided. In the case of this example, the partition reinforcing plate 15 has an intermediate portion 15c that is vertical in the front-rear direction, and a flange-shaped upper portion 1 that is bent outward at the upper portion of the intermediate portion 15c.
5a, and a flange-shaped lower part 15b bent inward at the lower part of the intermediate part 15c, and these upper part 15a and lower part 15b are overlap-welded to the overlapping weld parts 10 and 16, respectively. In addition,
In this example, this partition reinforcing plate 15 partitions only the lower part of the general surface 1b of the roof 1, and the lower part of the stepped part 1a is not partitioned, but of course, this partition reinforcing plate 15 can be seen in FIG. It is also possible to configure almost the entire box cross-sectional structure part A to be partitioned off. Further, reference numeral 17 denotes a hinge reinforcement welded to connect the hinge attachment portion of the roof rear edge portion 1a and the upper frame 14. As is clear from the above, the partition reinforcing plate 15
Since the roof 1 and the upper frame 14 are firmly connected on both sides thereof, the strength of the hinge attachment portion B (phantom line in FIG. 2) for the back door 5, which particularly requires rigidity, is further improved. Moreover, this partition reinforcing plate 15 is fixed by welding using the overlap welding part 10 between the main roof panel 4 and the sub-roof panel 3 and the overlap welding part 16 between the roof side rail inner panel 13 and the Atsupa frame 14. Therefore, there is no need to set a separate welding point,
The welding process does not become complicated. Moreover, with the structure of the back door opening of the present invention,
Since the atsupah frame 14 is only disposed on the back surface of the roof 1 relatively close to the roof, the rear upper part of the vehicle interior is wider than before. Further, by providing the rising portion 14a at the front part of the upper frame 14, the edge of the upper frame 14 is not exposed, and a sufficiently good appearance can be ensured without the need for setting a particular trim.

[Brief explanation of drawings]

Fig. 1 is a rear perspective view of an automobile in which the structure of the present invention is adopted, Fig. 2 is a partially cutaway enlarged cross-sectional perspective view of the area circled in Fig.
FIG. 4 is a cross-sectional view taken along the line - in FIG. 3, and FIG. 5 is a schematic cross-sectional view showing a conventional example. 1...Roof, 3...Subroof panel, 31...
...Inner edge, 4...Main roof panel, 41...Side edge, 5...Back door, 10...Polymerized welding part,
13'...Roof side rail inner panel, 1
3a...Inner edge, 14...Atsupa frame, 14
b...Side edge portion, 14c...Rear edge portion.

Claims (1)

[Scope of utility model registration request] The roof is formed by overlappingly welding the side edges of the main roof panel that makes up the center of the roof to the inner edges of the sub-roof panels that make up the side parts of the roof. The inner edge of the roof side rail inner panel is positioned in a corresponding manner, and the side edge of the upper frame that overlaps the lower side of the roof rear edge is overlap-welded to the inner edge of the roof side rail inner panel, and
In the structure of the upper part of the back door opening of the vehicle body formed by welding the rear edge of the Atsupa frame to the rear edge of the roof, a main roof panel and a sub-roof panel are provided in the space between the roof and the Atsupa frame. An upper part of a back door opening in a vehicle body, characterized in that a reinforcing partition plate is provided, the upper part of which is overlap welded to the overlap weld of the roof side rail inner panel and the upper frame, and the lower part of which is overlap welded to the overlap weld of the roof side rail inner panel and the upper frame. structure.