JPH0565078A - Car body skeleton member joining structure - Google Patents

Abstract

PURPOSE:To accomplish a joint structure which is free from generation of surface unevenness in the joining part of a joint material with a skeleton member such as front pillar. CONSTITUTION:A joint front pillar upper 12 is formed by casting, and steps 40, 50, 60 are formed at the joint edges with car body skeleton members 18, 20, 22. The level differences of these steps are made equal to the thicknesses of the skeleton members 18, 20, 22, so that no surface unevenness is generated in the joining parts of the front pillar upper 12 with the skeleton members 18, 20, 22 if the steps 40, 50, 60 of the front pillat upper 12 are inserted to the inside of the members 18, 20, 22 assuming a closed section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for a vehicle body frame member in which the ends of an extruded vehicle body frame member are joined.

[0002]

2. Description of the Related Art In a vehicle body frame, as shown in FIG. 2, ends of a front pillar upper 18, a roof side rail 20, a roof head rail 22 and the like are connected via a joint 50. ..

Conventionally, these front pillar uppers 1
8, roof side rail 20, roof head rail 22
The joint 50 and the joint 50 are formed by extrusion into a member having a closed cross section or an open cross section.

However, in the extrusion process, since it is not easy to form the end portions of the member intricately, for example, to form a stepped portion, normally, for example, as shown in a partially enlarged view of FIG. Skeleton members such as, and joint 5
The joint portion with 0 was joined by butt welding or lap welding. However, in such lap welding or the like, the bonding strength is weak and irregularities are generated, so that the aerodynamic characteristics cannot be improved.

[0005]

SUMMARY OF THE INVENTION In consideration of the facts described above, the present invention provides a joint structure for a vehicle body skeleton member that does not cause unevenness at the joint portion between the skeleton member such as the front pillar and the joint material. To aim.

[0006]

A joint structure for a vehicle body skeletal member according to the present invention has a step corresponding to a member thickness of the vehicle body skeletal member at a joint edge of a joint material formed by casting with the vehicle body skeletal member. The feature is that a step is formed.

[0007]

In the joint structure of the vehicle body frame member having the above structure, since the joint material is formed by casting, the step portion is easily formed at the joint edge of the joint material. The step difference of this step portion is made equal to the member thickness of the skeleton member. Therefore, when the step portion of the joint material is inserted and joined to the inside of the skeleton member which is generally configured to have a closed cross section, the outer surfaces of the skeleton member and the joint material are flush with each other, which causes unevenness at the joining portion. And the bond strength is increased.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The vehicle body frame member joining structure according to the present invention can be applied to the joint cowl side 10, the joint front pillar upper 12, the joint quarter pillar upper 14 and the joint package tray 16 shown in FIG.

Here, the joint front pillar upper 12 will be described as an example. The end portions of the front pillar upper 18, the roof side rail 20, and the roof head rail 22 are joined to the joint front pillar upper 12.

As shown in FIG. 1, the roof head rail 22 joined to the left end of the joint front pillar upper 12 is formed with side walls 26 and 28 which are formed by stepwise bending both ends of the board 24 in the width direction. It is an open section. A flange portion 36 extends upward at the tip of the side wall 28 so as to hook the hooking portion 34 of the roof 32. A rib 30 is erected from the bent portion of the side wall 28, and in combination with the flange portion 36, a mounting groove 38 into which a dam kit to which the windshield glass is mounted is fitted is formed. This joint front pillar upper 1
2 is Y-shaped when seen in a plan view, with the central axis as a boundary,
One is an open section and the other is a closed section. Further, the joint edge of the joint front pillar upper 12 joined to the roof head rail 22 has the same shape as the joint edge of the roof head rail 22, and the board 24 and the side wall 26 are further provided at the ends of the joint edge. , 28 is formed into the opening 40. As shown in FIG. 3, the step h of the step 40 is equal to the member thickness t of the roof head rail 22 so that the outer surface of the joint does not become uneven. Also, as shown in FIG.
The joint front pillar upper 12 is also formed with a rib 42 that abuts against the rib 36 of the roof head rail 22, and forms a mounting groove 44 that is continuous with the mounting groove 38.

The front pillar upper 18 has a closed cross-sectional shape, and ribs 46 and 48 are erected upward in the longitudinal direction. On the other hand, this front pillar upper 1
The joint edge of the joint front pillar upper 12 joined to 8 has the same shape as the joint edge of the front pillar upper 18, and at the end of the joint edge, a stepped portion 50 inserted into the closed cross section is formed. Are formed.

The roof side rail 20 has side walls 54 which are opposed to each other by bending both ends of the board 52 in the width direction in a stepwise manner.
56 is an open cross section. The hook portion 34 of the roof 32 is hooked on the flange portion 58 at the tip of the side wall 56. On the other hand, the joint edge of the joint front pillar upper 12 joined to the roof side rail 20 has the same shape as the joint edge of the roof side rail 20, and at the end of the joint edge, the board 52 and the side wall. A step portion 60 is formed to be inserted into the opening formed by 54 and 56.

Next, the operation of this embodiment will be described. The joint edges of the joint front pillar upper 12 according to this embodiment are joined to the ends of the front pillar upper 18, the roof side rail 20, and the roof head rail 22, respectively. This joining is performed with the step portions 40, 50, 60 formed at the joining edges of the joint front pillar upper 12 inserted into the inner space of the front pillar upper 18, the roof side rail 20, and the roof head rail 22, respectively. As a result, unevenness does not occur on the outer surface of the joining portion, and the joining strength can be improved.

[0014]

EFFECTS OF THE INVENTION Since the joint structure of the vehicle body frame member according to the present invention has the above-described structure, the joint portion between the frame member such as the front pillar and the joint material is not uneven, and the joint strength is improved. Planned.

[Brief description of drawings]

FIG. 1 is a partial perspective view showing a structure of a skeleton member to which a joint structure for a vehicle body skeleton member according to the present invention is applied.

FIG. 2 is a partial perspective view showing a joint portion of the joint structure for a vehicle body frame member according to the present invention.

FIG. 3 is a partial cross-sectional view showing a joint state of joint edges of a joint material and a skeleton member to which a joint structure for a vehicle body skeletal member according to the present invention is applied.

FIG. 4 is a partial cross-sectional view showing a joining state of a joining edge portion of a conventional joint material and a skeleton member.

[Explanation of symbols]

12 Joint front pillar upper (joint material) 40 steps 50 steps 60 steps

Claims (1)

[Claims] 1. A joint structure for a vehicle body skeletal member, characterized in that a step portion having a step corresponding to a member thickness of the vehicle body skeletal member is formed at a joint edge of the joint material formed by casting with the vehicle skeletal member. ..