JPH0323908Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a back fire wall structure located on the rear fender side of a vehicle body.

(Prior Art) As shown in FIGS. 5 to 7, a conventional fireproof wall structure includes a top back panel 5, which has been assembled in the main body assembly process, Each side strainer package tray 3 and center floor pan 1
The partition panel 2 is attached to the cross member 7 so as to close the space surrounded by the cross member 7.
0 is fixed with a plurality of bolts 21.
In this way, attach the partition panel 20 with bolts 2
The reason why the structure in which the partition panel 20 is fixed by means 1 is adopted is that it is difficult to weld the partition panel 20 in the main body assembly process and to ensure the accuracy of the assembly.

(Problems to be Solved by the Invention) In the above-mentioned conventional high-speed firewall structure, as shown in FIGS. 6 and 7, the high-speed back panel 5 and the strainer package tray 3 are
and a welding nut 22 fixed in advance to the center floor cross member 7 of the center floor pan 1;
The bolt insertion holes formed in the partition panel 20 may be misaligned due to variations in dimensional accuracy. This results in a portion where the bolt 21 and weld nut 22 cannot be tightened. In addition to this, bolt 21 and welding nut 22
Basically, if the partition panel 20 is tightened with the partition panel 20, it is not possible to expect high adhesion between the partition panel 20 and its counterpart. Problems also arise when the rigidity of the back subassembly is insufficient.

(Means for Solving the Problems) As is clear from FIGS. 1 and 2, the high back fire wall structure of the vehicle body according to the present invention includes a high back panel 5 and a center floor pan 1 of the vehicle body.
and the strainer package tray 3 on both sides.
It has a closed configuration.

In this configuration, a reinforcement 8 is provided between the strainer package trays 3 on both sides and forms a space with a closed cross section that is continuous in the vehicle width direction with the partition panel 10. Both strainer package trays 3 are connected by this reinforcement 8 and a partition panel 10. Further, the reinforcement panel 5 and the partition panel 10 are joined at the upper part of the reinforcement 8, and the reinforcement 8 is provided with a receiving portion 9 capable of receiving this joined portion. Moreover, this joint, the partition panel 10, and both strainer package trays 3 are joined by butt welding of integrally formed flanges. Furthermore, this partition panel 10 and the center floor pan 1
are joined by overlap welding.

(Function) According to the above configuration, the partition panel 1
0 can be assembled by spot welding or the like in the main body assembly process. Moreover, by joining the partition panels 10 by welding,
This solves the problem of parts that cannot be tightened due to mutual positional deviation when connecting bolts and weld nuts, and at the same time increases the rigidity of the attachment back subassembly. The adhesion of this partition panel 10 will also be improved.

Moreover, since both the strainer package trays 3 are connected by the reinforcement 8 and the partition panel 10, which constitute a space with a closed cross section continuous in the vehicle width direction, the torsional rigidity between these strainer package trays is reduced. It increases. Furthermore, since the reinforcement panel 5 and the partition panel 10 are joined at the upper part of the reinforcement 8, these two panels 5,
Ten joints are eliminated from the front side of the firewall structure.

(Example) Hereinafter, an example of the present invention will be specifically described based on FIGS. 1 to 4.

In FIG. 1, which is a perspective view of a part of the upper back firewall structure located on the rear fender side, and FIG. 2, which is a side cross-section thereof, the center floor pan 1 and A floor member subassembly consisting of the center floor cross member 7, etc., and a side member subassembly consisting of the wheel house inner panel 2, strainer package tray 3, bracket package tray 4, etc. that have already been welded together in the side member assembly process. What is
During the main body assembly process, each subassembly is joined to each other by welding at the necessary locations.

In this main body assembly process, the rear fender upper back 6 and the upper back panel 5 are assembled.
are assembled respectively. That is, this rear fender lifter bag 6 is welded and connected between the bracket package trays 4 located on both sides. The rear edge of the upper back panel 5 is placed on the upper surface of the rear fender upper back 6 as shown in FIG. The rear fender upper bag 6 and the receiving surface 4a of the bracket package tray 4 are assembled so as to be placed on the receiving surface 4a of the bracket package tray 4.
They are joined together by lap welding.

Now, in the main body assembly process, in addition to the above-mentioned assembly work, the joint between the strainer package trays 3 on both sides and the above-mentioned upper back panel 5 and the partition panel 10 described later is The reinforcement 8 is assembled along the That is, both ends of this reinforcement 8 are welded to each strainer package tray 3 on both sides, thereby strengthening the joint strength of the side member subassembly.

Furthermore, in this main body assembly process, the upper back panel 5 and the center floor pan 1 are
A partition panel 10 is assembled to close the space surrounded by the strainer package tray 3 and the strainer package tray 3 on both sides. In this partition panel 10, a groove 11 and a flange 12 are continuously formed on the outer peripheral edge other than the lower edge portion 10a. Concave grooves 13 and 15 and flanges 14 and 16 are also formed at the edges of the upper back panel 5 and the strainer package trays 3 on both sides to be joined to the flange 12 of the partition panel 10, respectively.

Therefore, in order to assemble the above-mentioned partition panel 10 in the main body assembly process, the flange 12 is connected to the flange 14 of the upper back panel 5 and to the strainer package trays 3 on both sides.
and the flanges 16 of each. At this time, the joint between the uppour back panel 5 and the partition panel 10 is formed as shown in FIG. Accepted and Partition Panel 1 as shown
A state set to 0 is stable. and,
As is clear from FIGS. 2 and 4, the flange 12 of the partition panel 10 and the flanges 14 and 16 that abut against it are connected to the groove 11 of the partition panel 10 and the upper back panel 5 or Each strainer package tray 3
The grooves 13 and 15 are located between the grooves 13 and 15. Therefore, when joining these flanges 12, 14, 16 by spot welding or the like, the welding gun can be easily introduced from one direction, and the spot welding operation can be easily performed.

In addition, the lower edge portion 1 of the partition panel 10
0a is the center floor cross member 7 with respect to the center floor pan 1, as is clear from FIG.
They are joined together by lap welding with a part of them interposed.

(Effect of the invention) In this way, the present invention combines both strainer package trays by the reinforcement and partition panel, which constitute a space with a closed cross section that continues in the vehicle width direction. The torsional rigidity between the trays is increased, and since the up-back panel and the partition panel are joined at the top of the reinforcement, the joint between these two panels can be removed from the front side of the firewall structure. , fire protection;
Soundproofing function and rigidity are improved.

[Brief explanation of drawings]

1 to 4 show embodiments of the present invention.
The figure is a perspective view showing a part of the firewall structure of the vehicle body, Figure 2 is a right sectional view of Figure 1, and Figure 3
The drawings are also an enlarged sectional view taken along the - line in FIG. 1, and FIG. 4 is an enlarged sectional view taken along the - line in FIG. 1. FIG. 5 is a perspective view of a conventional firewall structure corresponding to FIG. 1, FIG. 6 is an enlarged sectional view taken along the - line in FIG. 5, and FIG.
It is a line enlarged sectional view. 1... Center floor pan, 3... Strainer package tray, 5... Hot back panel, 8...
... Reinforcement, 9 ... Receiving portion formed on reinforcement, 10 ... Partition panel, 12 ... Flange of partition panel, 14 ... Flange of hot back panel, 1
6... Flange of strainer package tray.

Claims (1)

[Scope of Claim for Utility Model Registration] In the structure of a high-rise firewall for a vehicle body in which a space surrounded by a high-rise back panel and a center floor pan of the vehicle body, and a strainer package tray on both sides is closed by a partition panel, A reinforcement is provided between the strainer package trays on both sides, and forms a space with a closed cross section that is continuous in the vehicle width direction with the partition panel. In addition to joining the strainer package tray, the reinforcement panel and the partition panel are joined at the upper part of the reinforcement, and the reinforcement is provided with a receiving part capable of receiving this joined part, and The joint portion, the partition panel, and both strainer package trays are joined by butt welding of flanges integrally formed on each, and the partition panel and the center floor pan are joined by overlap welding. The car body features a fireproof wall structure.