JP2001171552A - Body structure - Google Patents

Abstract

(57) [Problem] To provide a vehicle body structure with good workability and less waste of material, while minimizing the occurrence of positioning errors and distortion during connection. SOLUTION: A rear pillar portion 2 forming a door opening 4 is provided.
And the roof rail part 3 are integrally formed.
Of the door opening 4 is extended to a position where the front corner 12 of the door opening 4 is formed, and is connected to the front pillar 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body structure in which a front pillar portion and a rear pillar portion are connected by a roof rail portion, and more particularly to a cab-over type vehicle body structure.

[0002]

2. Description of the Related Art In a cab-over type vehicle body structure in which a cab provided with a driver's seat is provided on a chassis frame, a front pillar portion and a rear pillar portion are respectively connected to the floor from the front-rear direction of the floor. There is a so-called front-back type in which a roof rail is connected to an upper part of a roof pillar part, a front pillar part, and a rear pillar part. In such a front-back type, generally, both ends of a roof rail portion are respectively connected to a front pillar portion and a rear pillar portion to form a door opening, and brazing is performed to cover a joint appearing at each connection portion, The attachment is polished and finished.

[0003]

In the vehicle body structure of the front back type, the lower portions of the front pillar portion and the rear pillar portion are joined to the floor by welding from the front and rear directions, so that positioning on the floor side in the front and rear direction is performed. Accuracy is relatively easy to obtain. However, on the roof side, since the upper part of the front pillar part and the upper part of the rear pillar part are connected by the roof rail part, connecting parts are formed at the front and rear ends of the roof rail part, respectively, and the connecting part on the roof side is two.
It will be a place. For this reason, errors and distortions due to misalignment in the front-rear direction at the joint between the upper part of the front pillar part and the front end of the roof rail part and the joint part between the upper part of the rear pillar part and the rear end of the roof rail part are directly reflected in the door opening part. Appears as accuracy. In order to connect these pillars with high accuracy, positioning for connecting the pillars and a facility for positioning the roof rail portion are required.

In addition, since the joint between each pillar portion and the roof rail is brazed and processed by brazing, a process for brazing or polishing and correction for removing distortion generated in the joint due to brazing. As the number of processes and the like increases, brazing equipment and the like are also required, which requires labor and cost.

If the front pillar, the roof rail, and the rear pillar are integrally formed in a gate shape, only the connecting portion with the floor is required, so that the door opening can be accurately formed with few welding portions. However, if the three members are integrally formed in a gate shape in this way, there is a problem that waste occurs in material removal and the press die becomes large. Further, since the press-formed product itself is larger than the molded product in which the front pillar portion, the roof rail portion, and the rear pillar portion are individually formed, there is a problem in terms of storage that it is difficult to place them. SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle body structure with good workability and less waste of materials to be used, while reducing the occurrence of positioning errors and distortion at the time of connection.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, a rear pillar portion forming a door opening and a roof rail portion are integrally formed, and the roof rail portion is connected to the front pillar portion. The end is extended to the position to form the front corner of the door opening and joined to the front pillar part, reducing the joint part between the roof rail part and other members and allowing for positional deviation in the front and rear direction By disposing the connecting portion, displacement and distortion in the front-rear direction at the time of connecting are reduced. Also, if the front pillar is the member that connects the roof rail integrally molded with the rear pillar, the front pillar is thin to ensure visibility,
The area of the seam that appears at the joint is small and inconspicuous.

According to the second aspect of the present invention, a body sealer is applied to the joint between the roof rail portion and the front pillar portion, and the number of work steps and costs are reduced as compared with the case of brazing.

In a vehicle body structure in which a front pillar portion and a rear pillar portion are connected via a roof rail portion to form a door opening, the front pillar portion and the roof rail portion are integrally formed, and the rear pillar of the roof rail portion is formed. The connecting end of the roof rail is extended to the position forming the rear corner of the door opening and is connected to the rear pillar, and the front and rear positional deviation is reduced while reducing the connecting portion between the roof rail and other members. You may arrange | position the connection part of a structure in an unacceptable part, and it may be made to reduce displacement and distortion in the front-back direction at the time of connection.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 shows a cab mounted on a chassis frame (not shown) of the vehicle. This cab forms a door opening 4 by connecting a front pillar portion 1 and a rear pillar portion 2 via a roof rail portion 3.
A door 5 is attached to the door opening 4 so as to be openable and closable about the front pillar 1 side. Front panels and rear panels (not shown) are coupled to the front pillar 1 and the rear pillar 2 in the vehicle width direction. A roof panel 6 is coupled to upper portions of the front pillar portion 1, the rear pillar portion 2, and the roof rail portion 3. The method of connecting the front pillar portion 1 and the rear pillar portion 2 with the roof rail portion 3 in this manner is called a so-called front back method.

As shown in FIG. 6, the front pillar portion 1 has a closed cross-sectional structure in which a press-formed front pillar outer 1a and a front pillar inner 1b are integrated with each other by spot welding.

As shown in FIG. 1, a lower end 1B of a front pillar portion 1 and a lower end 2A of a rear pillar portion 2 are mounted on mounts 9 and 10, and a front-rear direction (hereinafter, referred to as "G") of a vehicle indicated by a reference character G. Front end 7A and rear end 7B of floor panel 7 located in front-rear direction G ") are joined from front-rear direction G, respectively, and are joined by spot welding. The rear pillar 2 and the roof rail 3 are spot-welded to each other by press-forming a common outer panel 2a into a substantially L-shape as shown in FIG. 1 and an inner panel 2b as shown in FIGS. Are formed so as to have a continuous integral closed cross-sectional structure. That is, the rear pillar portion 2 and the roof rail portion 3 are integrally formed in a range indicated by reference numeral L in FIG. 1, and the outer panel 2 a between the rear pillar portion 2 and the roof rail portion 3 has no joint. The width W1 of the front pillar 1 in the front-rear direction G is smaller than the width W of the rear pillar 2, and the cross-sectional area of the front pillar 1 is smaller than that of the rear pillar 2 as shown in FIGS.

The front end of the roof rail portion 3 forms a connection end 2B with the front pillar portion 1, as shown in FIG. The roof rail portion 3 extends to a position forming a front upper corner 12 of the door opening portion 4, and after this corner 12, is joined to the inclined upper end 1 A of the front pillar portion 1 and spot-welded. Are joined by that. As shown in FIG. 2, a body sealer 13 is applied to the joint portion 11 so as to eliminate a seam, and the application portion of the body sealer 13 is blurred by rubbing with a brush (not shown) after the application.

According to the vehicle body structure having such a configuration, since the roof rail portion 3 for connecting the front pillar portion 1 and the rear pillar portion 2 is integrally formed with the rear pillar portion 2, the number of connecting portions is smaller than that of the conventional vehicle body structure. It is possible to reduce displacement and distortion in the front-back direction G at the joint. In addition, since the connecting portion 11 with the front pillar portion 1 is provided on the inclined portion passing through the corner 12 of the front pillar portion 1 whose position is regulated by the floor 7 with respect to the front-back direction G, the connecting portion 11 moves in the front-back direction G at the time of connection. Can be further reduced, and the range of the seam can be reduced, making the seam less noticeable. In this embodiment, the joints of the joints 11 are erased by applying a low-priced body sealer 13 instead of brazing as in the prior art. Therefore, the number of steps and costs can be reduced.

[0014] By reducing the distortion and misalignment at the time of connecting the pillars, the accuracy of the door opening 4 can be easily controlled, the gap between the door opening 4 and the door 5 can be made substantially uniform, and the appearance can be improved. Get better. Since the positional accuracy of the front pillar 1 is determined by the joint with the floor 7 and the positional accuracy of the rear pillar 2 is determined by the joint with the floor 7, the accuracy of the molded article in which the rear pillar 2 and the roof rail 3 are integrally formed. , The accuracy of the entire cab can be easily managed. Also, by improving the accuracy of the entire cab,
The accuracy of assembling the inner member mounted inside the cab is improved, and system management can be easily performed.

In the above-described embodiment, the rear pillar 2 and the roof rail 3 are integrally formed. However, the roof rail 3 may be integrally formed with the front pillar 1 and connected to the rear pillar. In this case, the connection end 1 </ b> C of the roof rail portion 3 with the rear pillar portion 2 may be extended to a position where the rear upper corner 14 of the door opening 4 is formed and coupled to the rear pillar portion 2. Even in such a case, the connecting portion 15 can be disposed at a position where the positional deviation between the front and the rear cannot be tolerated while reducing the connecting portion between the roof rail portion 3 and the rear pillar portion 2, and the displacement and the distortion in the front and rear direction G at the time of the coupling can be reduced. Can be reduced.

The vicinity of the connecting portion 15 is often located near the mounting portion of a seat belt anchor (not shown), and high strength is often required. For this reason, the connecting portion 15
It is preferable to braze the body sealer 13 (see FIG. 2) rather than apply it. Thus, even when brazing is performed on the coupling portion 15, the number of coupling portions can be reduced as compared with the conventional one, so that positional displacement and distortion in the front-rear direction G at the time of coupling can be reduced.

In the embodiment shown in FIG. 1, the joint 11 is coated with a body sealer 13 to make the joint inconspicuous at low cost. However, the joint 11 may be subjected to a brazing process. In this case, since the cross-sectional area of the front pillar portion 1 is smaller than the cross-sectional area of the roof rail portion 3 as shown in FIGS. 5 and 6, the range of brazing is small and distortion is small.

[0018]

According to the present invention, since the number of joints is reduced, the joints are less noticeable while reducing the displacement and distortion in the front-rear direction at the time of joining, thereby improving workability and reducing costs. According to the present invention, the number of work steps and cost can be reduced as compared with the case of brazing.

[Brief description of the drawings]

FIG. 1 is a main part configuration diagram of a vehicle body structure showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line E-E of FIG. 1, which is a cross-section of a joint between a front pillar portion and a roof rail portion.

FIG. 3 is a side view of a front-back type cab to which the present invention is applied.

FIG. 4 is a cross-sectional view taken along the line CC in FIG. 3, which is a cross-section of a rear pillar portion.

FIG. 5 is a sectional view taken along line 3B-B of FIG. 3, which is a section of the roof rail portion.

FIG. 6 is a cross-sectional view taken along the line AA of FIG. 3, which is a cross section of the front pillar portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front pillar part 2 Rear pillar part 2A Connection end of roof rail part 3 Roof rail part 4 Door opening 11 Joint part 12 Front corner 13 Body sealer

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tetsuya Inaba 5-33-8 Shiba, Minato-ku, Tokyo F-term in Mitsubishi Motors Corporation (reference) 3D003 AA11 AA12 BB09 CA33 CA35 CA40 DA17

Claims (2)

[Claims] In a vehicle body structure in which a front pillar portion and a rear pillar portion are coupled via a roof rail portion to form a door opening, the rear pillar portion and the roof rail portion are integrally formed, and the roof rail portion has A vehicle body structure in which a connection end with a front pillar portion extends to a position forming a front corner of the door opening and is connected to the front pillar portion. 2. The vehicle body structure according to claim 1, wherein a body sealer is applied to a joint between said roof rail portion and said front pillar portion.