JPH04208677A - Joint part structure of car body skeleton frame member - Google Patents

Abstract

PURPOSE:To facilitate the brazing work to a joint part by extending the edge part in the longitudinal direction of a roof side rail outer to a pillar side, exceeding the edge part of a roof panel, and joining the roof side rail outer with a pillar outer, and setting the joint part of both the outers at a relatively low position. CONSTITUTION:The front edge part of a roof side rail outer 2 which constitutes a roof side rail having a closed section together with a roof side rail inner 3 extends to a front pillar 8 side, exceeding the front edge part of a roof panel 4. The upper edge part of the pillar outer 9 of the front pillar 8 is joined with the extension part of the roof side rail outer 2, and the upper edge part of a pillar inner 10 is joined with the edge part of a pillar connection part 7 of a front roof rail 5. Further, an extension 16 is extended integrally with the inner 3 from the joint part between the roof side rail inner 3 and the rail connection part 6 of the roof rail 5, and the edge part of the stage part 17 of the extension 16 is joined with the vicinity of the edge part of the pillar connection part 7 of the front roof rail 5.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a joint structure of a vehicle body frame member, particularly a roof side rail which is a roof longitudinal frame member, a roof rail which is a roof frame member in a vehicle width direction, and a roof rail which is a roof frame member in a vehicle width direction. It relates to a trifurcated structure to which pillars, which are skeletal members, are connected.

BACKGROUND ART FIGS. 6 to 8 show a conventional structure, in which 1 is a roof side rail formed in a closed cross section by an outer roof side rail 2 and an inner roof side rail 3; the outer roof side rail 2. The roof side rail inner 3 has flanges 2a and 3a formed on both side edges thereof,
These flanges 2a and 3a are joined together by spot welding to form the aforementioned closed cross-sectional shape. Reference numeral 4 denotes a roof panel, and a flange 4a formed on the side edge in the vehicle width direction is connected to a flange 2 of the roof side rail 1 on the vehicle body center side.
These flanges 2 a...
3 It is integrally joined with a. Reference numeral 5 denotes a front roof rail as a roof rail, which is formed to have an inverted hat shape in cross section, and has a rail connecting portion 6 extending toward the roof side rail 1 at its end in the vehicle width direction, and a front pillar 8 as a pillar described later. The pillar connecting portion 7 is extended, and the rail connecting portion 6 is connected to the roof side rail inner 3.
It is fitted and joined to the end of the.

The front pillar 8 has a pillar outer 9 and a pillar inner 10.
It is formed into a closed cross section. These pillar outer 9. The pillar inner 10 also has flanges 9a and 1 on both side edges, respectively.
0a, and these flanges 9a and 10a are joined together by spot welding. Pillar outer 9
．． Each of the pillar inners 10 extends to the vicinity of the end of the rail connection portion 6 of the front roof rail 5, and
The upper end of the pillar inner 10 is formed into a flat plate so as to gradually become substantially flush with the flange 10a, with the oblique wall 11 as a shape changing part from near the end of the pillar connection part 7 of the front roof rail 5.

Then, the pillar connecting portion 7 of the front roof rail 5 is externally fitted and joined to the rising base of the inclined wall 11 of the front pillar inner 10, and the end of the roof side rail outer 2 is externally fitted to the upper end portion of the pillar outer 9. It is then joined. This similar structure was developed by Nissan Motor Co., Ltd. in 1985, for example.
It is shown in the ``Bluebird Maintenance Instructions'' published by Co., Ltd.

In addition, as shown in FIGS. 9 and 10, the upper end of the pillar outer 9 of the front pillar 8 is formed to have a length up to the vicinity of the rising base of the slanted wall 11 of the pillar inner 10, while the roof side rail outer 2 is There is also known a structure in which the roof side rail outer 2 extends beyond the front end of the roof panel 4 to the front pillar 8 side, and the end of the roof side rail outer 2 is fitted onto and joined to the upper end of the pillar outer 9 (1987).
New model car manual No. published by Mitsubishi Motors Corporation in October.

1038530).

Problems to be solved by the invention Roof side rail 1. When connecting the front roof rail 5 and the front pillar 8, due to the process, the roof side rail 1 is formed in advance into a closed cross section by the roof side rail outer 2 and the roof side rail inner 3.
While the roof side rail inner 3 and the rail connecting portion 6 of the front roof rail 5 are joined, the front pillar 8 is formed into a closed section by the pillar outer 9 and the pillar inner 10, and the pillar inner 10 of the front pillar 8 is formed.
is joined to the pillar connection part 7 of the front roof rail 5, and the pillar outer 9 and the roof side rail outer 2
I am trying to connect them.

Further, the joint between the pillar outer 9 and the roof side rail outer 2 is finished by brazing 12 so that the parting line does not become a step.

However, in the structure shown in FIGS. 6 to 8, the pillar outer 9. Since the upper ends of the pillar inners 10 are substantially aligned and extend to the front end of the roof panel 4, the front pillar
8 can be inserted and set relatively easily into the front roof rail 5 and the roof side rail outer 2, and the joining work can be done smoothly.
A seam between the roof side rail outer 2 and the roof side rail outer 2 is formed at the front end of the roof panel 4, and the seam is shown in FIG. As shown in the range, roof side rail 1 and roof panel 4
Since it goes all the way to the groove 13 connecting the joints, the worker must stretch up when brazing this joint, resulting in poor work efficiency.

On the other hand, in the structure shown in Fig. 9.10, the joint between the pillar outer 9 and the roof side rail outer 2 is located at the side of the front window, so the joint is located at a relatively low position. Brazing work can be easily performed. However, since the upper end of the pillar inner 10 protrudes longer than the upper end of the pillar outer 9,
Front pillar 8 and roof side rail 1. When connecting the front roof rail 5 to the assembly, the upper end of the pillar inner 8 must be inserted into the opening between the 2 ends of the roof side rail outer and the 7 ends of the pillar connection part of the front roof rail 5. The degree of interference between the panels. becomes expensive and connection work becomes very poor.

Further, even in the above-mentioned structure, the space between the upper end of the pillar inner 10 and the front roof rail 5 is open, and the pillar inner 10 and the front roof rail 5 are shaped like a bag. like,
When the drain hose 15 is inserted through the opening 14 formed in a part of the corner of the front roof rail 5 on the roof panel 4 side and passes through the closed section of the front pillar 8, the drain hose 15 is inserted into the bag-shaped pillar inner 10. The drain hose 1 gets into the gap between the front roof rails 5.
There is also a problem that easily interferes with the insertion work of No. 5.

Therefore, the present invention provides a vehicle body frame member that allows easy connection work between pillars, roof side rails, and roof rail assemblies, and also allows easy brazing work on the joint between the roof side rail outer and the pillar outer. This provides a joint structure.

Means for Solving the Problems A roof side rail is formed with a closed cross section by an outer roof side rail and an inner roof side rail, is provided on the side of the roof in the longitudinal direction, and has a roof panel joined to the center side of the vehicle body; In an upper trifurcated structure in which a pillar that is formed in a closed cross section by a pillar outer and a pillar inner and extends from the bottom of the vehicle body upward, and a roof rail that has an inverted hat-shaped cross section and extends in the vehicle width direction are combined, the front and rear ends of the roof side rail outer The part is extended to the pillar side beyond the end of the roof panel and joined to the pillar outer,
A roof side rail inner is joined to the end of the roof rail in the vehicle width direction on the roof side rail side, an extension is provided that extends from this joint to the roof side rail inner above the roof rail, and a space between the extension and the roof rail is provided. A terrace part forming a closed cross-section is formed at the roof rail, one end of the terrace part is joined to the vicinity of the pillar-side end of the roof rail, and the pillar-side end of the roof rail is joined to the pillar inner.

Function: Since the longitudinal end of the roof side rail outer extends beyond the end of the roof panel to the pillar side and is joined to the pillar outer, the joint between the roof side rail outer and the pillar outer is located at a relatively low position. Brazing work on the joint becomes easy. Further, an extension of the inner roof side rail extends upward from the joint between the inner roof side rail and the roof rail, joins the end of the roof rail on the pillar side, and connects to the end of the roof rail on the pillar side. Since the pillar inner is joined to the top of the pillar to prevent the lengths of the upper ends of the pillar outer and pillar inner from being extremely different, the fitting and connection work of the pillar to the roof side rail and roof rail assembly is greatly improved. Ru. Furthermore, since the extension is provided with a terrace, and a closed section is formed between the terrace and the roof rail, the strength and rigidity of the upper three-pronged joint part are of course increased. When inserting tubes, harnesses, etc. into the pillar from the upper three-pronged joint,
The terrace portion serves as an insertion guide, allowing tubes and the like to be inserted smoothly without getting caught.

Example Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In Figures 1 and 2, ■ is the roof side rail outer 2
The roof side rail is formed into a closed section by the roof side rail inner 3 and the roof side rail outer 2. Each of the inner roof side rails 3 has flanges 2a and 3a on both side edges, and these flanges 2a and 3a are joined together by spot welding to form the aforementioned closed cross-sectional shape.

4 is a roof panel, and a flange 4a formed on the side edge in the vehicle width direction is overlapped with the overlapping portion of the flanges 2a and 3a on the vehicle center side of the roof side rail 1, and is integrally joined to these flanges 2a and 3a. It is.

Further, the front end of the roof side rail outer 2 extends beyond the front end of the roof panel 4 toward a front pillar 8, which will be described later.

Reference numeral 5 denotes a front roof rail as a roof rail, which is formed into an inverted hat shape in cross section, and has a rail connection part 6 extending toward the roof side rail 1 side and a rail connection part extending toward the front pillar 8 side, which will be described later, at its end in the vehicle width direction. 7 is extended, and is externally fitted and joined to the end portion of the roof side rail inner 3 of the roof side rail 1 in which the rail connecting portion 6 has been previously formed in the closed cross section.

The front roof rail 5 is then connected to the roof side rail inner 3 from the joint between the roof side rail inner 3 and the rail connecting portion 6 of the front roof rail 5.
An extension 16 extending upwardly is integrally installed. This extension 16 includes a roof rail 5
The terrace part 17 forming the closed cross-section part 18 between the roof side rail inner 3 and the flanges 3a on both sides of the roof side rail inner 3 are approximately the same.
It is formed with a stepped height, and one end of this terraced portion 17 is joined to the vicinity of the end of the pillar connection portion 7 of the front roof rail 5.

Reference numeral 8 indicates a front pillar as a pillar, which is formed into a closed cross section by a pillar outer 9 and a pillar inner 10. These pillar outer 9. Each pillar inner 10 has flanges 9a, 10a on both side edges, and these flanges 9a,
10a are joined together by spot welding to form the front pillar 8 into a closed cross-sectional shape as described above. The upper end of the pillar outer 9 of this front pillar 8 is joined to the roof side rail outer 2 extending beyond the front end of the roof panel 4, and the pillar inner 10
The upper end portion of the front roof rail 5 is joined to the end of the pillar connection portion 7 of the front roof rail 5. In this embodiment, the upper end of the pillar inner 10 is formed to be slightly shorter than the upper end of the pillar outer 9, and the end of the terrace part 17 of the extension 16 is joined to the end of the pillar connecting part 7.

According to the above embodiment structure, the front end of the roof side rail outer 2 extends beyond the front end of the roof panel 2 toward the front pillar 8 and is joined to the pillar outer 9. When performing brazing on the joint between the outer 2 and the pillar outer 9, the brazing work can be performed on the side of the front window, so there is no blind spot for the worker, and work efficiency can be significantly improved. Furthermore, even if the joint between the roof side rail outer 2 and the pillar outer 9 is set at a relatively low position, the upper end of the pillar inner 1O can be shortened due to the presence of the extension 16 of the roof side rail inner 3. Therefore, the length of the roof side rail 1. can be approximately the same as that of the pillar outer 9.
When connecting the front pillar 8 to the front roof rail 5 assembly, the upper end of the front pillar 1 can be easily inserted into the opening between the roof side rail outer 2 end and the pillar connection part 7 end of the front roof rail 5. , this connection work can also be easily performed.

Further, the extension 16 includes a terrace 17 and a closed section 18 is formed between the terrace 17 and the front roof rail 5, so that the roof side rail 1. Front roof rail5. In addition to increasing the joint rigidity of the upper triangular part of the front pillar 8, when inserting the drain hose 15 through the opening 14 provided in a part of the corner of the front roof rail 5 on the roof panel 4 side, as in a car with a sunroof, There is also an advantage that the terrace portion 17 serves as an insertion guide for the drain hose 15, allowing the drain hose 15 to be inserted smoothly.

In the above embodiment, the extension 16 is integrally extended to the roof side rail inner 3, but it goes without saying that it may be molded separately.

In addition, one or more bead portions 1 are provided on the terrace portion 17 toward the front roof rail 5 side as shown in FIGS. 3 to 5.
9, and the bead portion 19 is attached to the front roof rail 5.
If the closed cross-section portions 18 are separated into a plurality of parts by joining, the joint rigidity of the upper three-pronged portion can be further increased. In this embodiment, the extension 16 is formed separately from the roof side rail inner 3, but the roof side rail inner 3 may be formed integrally. Further, it goes without saying that the present invention can be applied to the upper trifurcation at the rear of the roof, that is, the joint portion between the roof side rail 1 and a rear pillar or rear roof rail (not shown).

Note that the * and V marks in the figure indicate spot welding points.

Effects of the Invention As described above, according to the present invention, the joint between the roof side rail outer and the pillar outer can be set at a low position.
Brazing the joint can be easily performed, and the upper end of the pillar inner can be made approximately the same length as the upper end of the pillar outer, so the roof side rail,
Fitting and connecting the pillar to the roof rail assembly can be easily performed. In addition, the roof side rail inner extension has a terrace and forms a closed section between it and the roof rail.
Of course, the joint rigidity of the upper trifurcation can be further increased,
When inserting the sunroof drain hose into the interior of the pillar, this stepped portion serves as an insertion guide, which has the advantage of allowing the insertion work to be carried out smoothly.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing one embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is an exploded view equivalent to Fig. 1 showing a different example of the present invention. A perspective view, FIG. 4 is a sectional view taken along line A'-A' in FIG. 3, and FIG. 5 is a sectional view taken along line A'-A in FIG. 3.
Figure 6 is an exploded perspective view showing the conventional structure, Figures 7 and 8 are cross-sectional views taken along line B-B and line C-C in Figure 6, Figure 9 is FIG. 10 is an exploded perspective view showing a different example of the conventional structure, and is a sectional view taken along the line DD in FIG. 9. 1... Roof side rail, 2... Roof side rail outer, 3... Roof side rail inner, 4...
... Roof panel, 5... Roof rail, 8... Pillar, 9... Pillar outer, 10... Pillar inner, 16... Extension, 17... Terrace part, 1
8...Closed section. Figure 2 Figure 4 Figure 7

Claims (1)

[Claims] (1) A roof side rail that is formed into a closed cross section by an outer roof side rail and an inner roof side rail, is provided in the front-rear direction on the side of the roof, and has a roof panel joined to the center side of the vehicle body, and a pillar outer and an inner pillar. In an upper trifurcated structure in which a pillar is formed with a closed cross section and extends upward from the bottom of the vehicle body, and a roof rail with an inverted hat-shaped cross section extends in the vehicle width direction, the longitudinal ends of the roof side rail outer are connected to the roof. It extends beyond the edge of the panel to the pillar side and joins with the pillar outer, while the roof side rail inner is joined to the end of the roof rail on the roof side rail side at the end of the vehicle width direction, and from this joint, the roof side rail An extension extending above the roof rail is provided on the inner, a terrace part forming a closed section between the extension and the roof rail is formed, and one end of the terrace part is placed near the pillar side end of the roof rail. 1. A joint structure for a vehicle body frame member, characterized in that the roof rail is joined to a pillar inner end of the roof rail.