JPS631224B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a front pillar structure for an automobile.

The conventional front pillar structure of an automobile is composed of a member separate from the side sill structural member, and there have been problems in terms of assembly work, the strength and precision of the vehicle body structure around the door, and aesthetics.

Furthermore, in order to increase the strength of the vehicle body structure around the door, Japanese Utility Model Application Publication No. 54-15916 made the outer panel part of the side sill a double panel structure, one panel was extended upward to form a pillar outer, and the other panel was made into a double panel structure. Bend the panel inward to the vehicle interior at the top of the side sill with the bend horizontal, extend it slightly upwardly and inclinedly by a width approximately equal to the thickness of the pillar, and extend upward from the end to form the pillar inner, A structure has been proposed in which the pillar outer and pillar inner form a closed cross section. In this structure, the closed cross-sectional structure of the pillar and the closed cross-sectional structure of the side sill are separated by a bent portion of the pillar inner, that is, a step-down partition, and the strength of the vehicle body structure around the door is increased to some extent. However, the partitions are arranged horizontally and are not designed to increase the strength of the car body structure in the vertical direction. It has not been designed to have any strong effect on force.

The present invention has been made in view of the above-mentioned problems regarding conventional pillar structures of automobiles, and includes a structure in which a part of the constituent members of the front pillar part and a part of the constituent members of the side sill part are made of an integral member. The purpose of the present invention is to provide an automobile front pillar structure that is easy to assemble and has excellent strength.

The present invention also provides strength against vibrations in a vertical plane including the running direction of the vehicle body by providing a partition surface extending in the vertical direction at the joint between the closed cross-sectional structure of the front pillar portion and the closed cross-sectional structure of the side sill portion. ,
Another object of the present invention is to provide a front pillar structure for an automobile in which the strength of the side sill itself, particularly the front end of the side sill, is increased.

In order to achieve these objects, the present invention has a closed cross section formed by a front pillar inner that extends the front end of an outer member of a side sill upward, and a front pillar outer that is overlapped with the front pillar inner from the outside. The side sill portion of the front pillar inner is formed with a vertical wall-like step-down surface that slopes inwardly toward the front, and the step-down surface partitions the side sill internal space and the front pillar internal space. The front pillar structure of an automobile is characterized by:

Embodiments of the present invention will be described below based on the drawings. As shown in FIG. 1, a cab side frame outer 1 including a front pillar structure according to the present invention is integrally constructed including a side sill portion 2, a front pillar portion 3, a rear fender portion 4, a rain rail outer portion 5, etc. be done. The front pillar part 3 includes a front pillar inner part 3a extending upward from the lower side sill part 2, and a front pillar outer part 3b connected to the rain rail outer part 5 at the lower part.
The front pillar inner part 3 a and the front pillar outer part 3 b above the front pillar inner part 3 a are connected via a step-down surface 14 .

Side sill part 2 and front pillar inner part 3a
As shown in FIG. 2, the front pillar has a step-down surface 6 in the middle thereof, and a door hinge mounting hole 7 is provided in the lower part of the front pillar outer part 3b.

The front pillar outer 8, which is superimposed on the front pillar inner part 3a from the outside, has mounting holes 9 and 10 for upper and lower door hinges, as shown in FIG. It has a welding flange 12 to the dash panel upper. The x mark shown on the welding flange 12 is the planned spot welding position.

As shown in FIG. 4, the assembly of the front pillar inner part 3a and the front pillar outer 8 is such that the lower part of the front pillar outer 8 embraces the step-down surface 6, and the door mounting hole 7 and the upper door mounting hole 9 are assembled. are placed so that they match and spot welded. A door hinge reinforcement 13 is disposed inside the front pillar outer 8 near the lower door attachment hole 10, and the door hinge reinforcement 13 is spot welded to the front pillar inner portion 3a.

The front pillar outer part 3b forming the upper part of the front pillar forms a closed cross section with the upper inner member 15 overlapped from the inside. The upper inner member 15 has an extension 15a at the front, and is welded to the front pillar outer 8 at the extension 15a. The cab side frame outer 1 is formed by being lowered at the lower part of the front pillar part 3 and between the front pillar inner part 3a and the front pillar outer part 3b, and serves as an inner member between these lowered parts. There is.

As described above, the present invention has a closed cross section formed by a front pillar inner in which the front end of the outer member of the side sill is extended upward, and a front pillar outer superimposed on the front pillar inner from the outside. The side sill portion of the front pillar inner is formed with a vertical wall-like step-down surface that slopes inwardly toward the front, and the step-down surface partitions the side sill internal space and the front pillar internal space. Because this is the front pillar structure of an automobile, the cab side frame outer consisting of the side sill part, front pillar inner part, rear fender part, rain rail outer part, etc. can be integrally formed, making it easy to process and assemble. , can bring great advantages in terms of strength and aesthetics of the vehicle body structure.

Further, according to the present invention, at the joint portion between the closed cross-section structure of the side sill portion and the closed cross-section structure of the front pillar portion,
It is possible to form nodes partitioned by vertical wall-like step-down surfaces. Therefore, even if a bending force in a vertical plane including the traveling direction of the automobile is applied to the joint between the side sill part and the front pillar part, the vertical wall-like step-down surface will not bend the side sill part and the front pillar part in the vertical plane. This acts to prevent angular displacement between the side sill portion and the side sill portion, thereby increasing the strength of the vehicle body structure around the door.Furthermore, the strength of the front end portion of the side sill portion itself can be increased.

Furthermore, the present invention allows the front pillar outer of the hinge pillar portion to which the door hinge is attached to be formed of a member thicker than the side sill member, and this structure also has the effect of further increasing the strength of the vehicle body structure. have

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the cab side frame outer according to the embodiment of the present invention, Fig. 2 is an enlarged view of the front pillar inner part of Fig. 1, Fig. 3 is a perspective view of the pillar outer, and Fig. 4 is the above It is an assembly diagram of a front pillar inner part and a pillar outer part. 1... Cab side frame outer, 2... Side sill part, 3... Front pillar part, 3a...
Front pillar inner part, 3b...Front pillar outer part, 4...Rear fender part, 5...Rain rail outer part, 6...Step lowering surface, 7...Door mounting hole, 8...Front pillar outer part, 9... ...Upper door mounting hole, 10...Lower door mounting hole, 11, 12
...Welding flange, 13...Door hinge reinforcement.

Claims (1)

[Claims] 1 A closed cross section is formed by a front pillar inner that extends the front end of the outer member of the side sill upward, and a front pillar outer that is overlapped with the front pillar inner from the outside, and the side sill part of the front pillar inner is 1. A front pillar structure for an automobile, characterized in that a step-down surface in the form of a vertical wall that slopes inwardly toward the front is formed, and the step-down surface partitions a side sill internal space and a front pillar internal space.